define(["@jupyter-widgets/base"], (__WEBPACK_EXTERNAL_MODULE__2055__) => { return /******/ (() => { // webpackBootstrap
/******/ 	var __webpack_modules__ = ({

/***/ 4733:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'align-justify';
var width = 448;
var height = 512;
var ligatures = [];
var unicode = 'f039';
var svgPathData = 'M432 416H16a16 16 0 0 0-16 16v32a16 16 0 0 0 16 16h416a16 16 0 0 0 16-16v-32a16 16 0 0 0-16-16zm0-128H16a16 16 0 0 0-16 16v32a16 16 0 0 0 16 16h416a16 16 0 0 0 16-16v-32a16 16 0 0 0-16-16zm0-128H16a16 16 0 0 0-16 16v32a16 16 0 0 0 16 16h416a16 16 0 0 0 16-16v-32a16 16 0 0 0-16-16zm0-128H16A16 16 0 0 0 0 48v32a16 16 0 0 0 16 16h416a16 16 0 0 0 16-16V48a16 16 0 0 0-16-16z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.Ti = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 4383:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'chart-bar';
var width = 512;
var height = 512;
var ligatures = [];
var unicode = 'f080';
var svgPathData = 'M332.8 320h38.4c6.4 0 12.8-6.4 12.8-12.8V172.8c0-6.4-6.4-12.8-12.8-12.8h-38.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h38.4c6.4 0 12.8-6.4 12.8-12.8V76.8c0-6.4-6.4-12.8-12.8-12.8h-38.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-288 0h38.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-38.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h38.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-38.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zM496 384H64V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-32c0-8.84-7.16-16-16-16z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.$F = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 2888:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'check';
var width = 512;
var height = 512;
var ligatures = [];
var unicode = 'f00c';
var svgPathData = 'M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.e6 = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 2174:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'edit';
var width = 576;
var height = 512;
var ligatures = [];
var unicode = 'f044';
var svgPathData = 'M402.6 83.2l90.2 90.2c3.8 3.8 3.8 10 0 13.8L274.4 405.6l-92.8 10.3c-12.4 1.4-22.9-9.1-21.5-21.5l10.3-92.8L388.8 83.2c3.8-3.8 10-3.8 13.8 0zm162-22.9l-48.8-48.8c-15.2-15.2-39.9-15.2-55.2 0l-35.4 35.4c-3.8 3.8-3.8 10 0 13.8l90.2 90.2c3.8 3.8 10 3.8 13.8 0l35.4-35.4c15.2-15.3 15.2-40 0-55.2zM384 346.2V448H64V128h229.8c3.2 0 6.2-1.3 8.5-3.5l40-40c7.6-7.6 2.2-20.5-8.5-20.5H48C21.5 64 0 85.5 0 112v352c0 26.5 21.5 48 48 48h352c26.5 0 48-21.5 48-48V306.2c0-10.7-12.9-16-20.5-8.5l-40 40c-2.2 2.3-3.5 5.3-3.5 8.5z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.MT = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 6705:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'image';
var width = 512;
var height = 512;
var ligatures = [];
var unicode = 'f03e';
var svgPathData = 'M464 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h416c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM112 120c-30.928 0-56 25.072-56 56s25.072 56 56 56 56-25.072 56-56-25.072-56-56-56zM64 384h384V272l-87.515-87.515c-4.686-4.686-12.284-4.686-16.971 0L208 320l-55.515-55.515c-4.686-4.686-12.284-4.686-16.971 0L64 336v48z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.jb = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 9718:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'layer-group';
var width = 512;
var height = 512;
var ligatures = [];
var unicode = 'f5fd';
var svgPathData = 'M12.41 148.02l232.94 105.67c6.8 3.09 14.49 3.09 21.29 0l232.94-105.67c16.55-7.51 16.55-32.52 0-40.03L266.65 2.31a25.607 25.607 0 0 0-21.29 0L12.41 107.98c-16.55 7.51-16.55 32.53 0 40.04zm487.18 88.28l-58.09-26.33-161.64 73.27c-7.56 3.43-15.59 5.17-23.86 5.17s-16.29-1.74-23.86-5.17L70.51 209.97l-58.1 26.33c-16.55 7.5-16.55 32.5 0 40l232.94 105.59c6.8 3.08 14.49 3.08 21.29 0L499.59 276.3c16.55-7.5 16.55-32.5 0-40zm0 127.8l-57.87-26.23-161.86 73.37c-7.56 3.43-15.59 5.17-23.86 5.17s-16.29-1.74-23.86-5.17L70.29 337.87 12.41 364.1c-16.55 7.5-16.55 32.5 0 40l232.94 105.59c6.8 3.08 14.49 3.08 21.29 0L499.59 404.1c16.55-7.5 16.55-32.5 0-40z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.qI = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 3801:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'list-ol';
var width = 512;
var height = 512;
var ligatures = [];
var unicode = 'f0cb';
var svgPathData = 'M61.77 401l17.5-20.15a19.92 19.92 0 0 0 5.07-14.19v-3.31C84.34 356 80.5 352 73 352H16a8 8 0 0 0-8 8v16a8 8 0 0 0 8 8h22.83a157.41 157.41 0 0 0-11 12.31l-5.61 7c-4 5.07-5.25 10.13-2.8 14.88l1.05 1.93c3 5.76 6.29 7.88 12.25 7.88h4.73c10.33 0 15.94 2.44 15.94 9.09 0 4.72-4.2 8.22-14.36 8.22a41.54 41.54 0 0 1-15.47-3.12c-6.49-3.88-11.74-3.5-15.6 3.12l-5.59 9.31c-3.72 6.13-3.19 11.72 2.63 15.94 7.71 4.69 20.38 9.44 37 9.44 34.16 0 48.5-22.75 48.5-44.12-.03-14.38-9.12-29.76-28.73-34.88zM496 224H176a16 16 0 0 0-16 16v32a16 16 0 0 0 16 16h320a16 16 0 0 0 16-16v-32a16 16 0 0 0-16-16zm0-160H176a16 16 0 0 0-16 16v32a16 16 0 0 0 16 16h320a16 16 0 0 0 16-16V80a16 16 0 0 0-16-16zm0 320H176a16 16 0 0 0-16 16v32a16 16 0 0 0 16 16h320a16 16 0 0 0 16-16v-32a16 16 0 0 0-16-16zM16 160h64a8 8 0 0 0 8-8v-16a8 8 0 0 0-8-8H64V40a8 8 0 0 0-8-8H32a8 8 0 0 0-7.14 4.42l-8 16A8 8 0 0 0 24 64h8v64H16a8 8 0 0 0-8 8v16a8 8 0 0 0 8 8zm-3.91 160H80a8 8 0 0 0 8-8v-16a8 8 0 0 0-8-8H41.32c3.29-10.29 48.34-18.68 48.34-56.44 0-29.06-25-39.56-44.47-39.56-21.36 0-33.8 10-40.46 18.75-4.37 5.59-3 10.84 2.8 15.37l8.58 6.88c5.61 4.56 11 2.47 16.12-2.44a13.44 13.44 0 0 1 9.46-3.84c3.33 0 9.28 1.56 9.28 8.75C51 248.19 0 257.31 0 304.59v4C0 316 5.08 320 12.09 320z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.Ts = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 2162:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'pause';
var width = 448;
var height = 512;
var ligatures = [];
var unicode = 'f04c';
var svgPathData = 'M144 479H48c-26.5 0-48-21.5-48-48V79c0-26.5 21.5-48 48-48h96c26.5 0 48 21.5 48 48v352c0 26.5-21.5 48-48 48zm304-48V79c0-26.5-21.5-48-48-48h-96c-26.5 0-48 21.5-48 48v352c0 26.5 21.5 48 48 48h96c26.5 0 48-21.5 48-48z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.G1 = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 3852:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'play';
var width = 448;
var height = 512;
var ligatures = [];
var unicode = 'f04b';
var svgPathData = 'M424.4 214.7L72.4 6.6C43.8-10.3 0 6.1 0 47.9V464c0 37.5 40.7 60.1 72.4 41.3l352-208c31.4-18.5 31.5-64.1 0-82.6z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.ij = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 3430:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'question-circle';
var width = 512;
var height = 512;
var ligatures = [];
var unicode = 'f059';
var svgPathData = 'M504 256c0 136.997-111.043 248-248 248S8 392.997 8 256C8 119.083 119.043 8 256 8s248 111.083 248 248zM262.655 90c-54.497 0-89.255 22.957-116.549 63.758-3.536 5.286-2.353 12.415 2.715 16.258l34.699 26.31c5.205 3.947 12.621 3.008 16.665-2.122 17.864-22.658 30.113-35.797 57.303-35.797 20.429 0 45.698 13.148 45.698 32.958 0 14.976-12.363 22.667-32.534 33.976C247.128 238.528 216 254.941 216 296v4c0 6.627 5.373 12 12 12h56c6.627 0 12-5.373 12-12v-1.333c0-28.462 83.186-29.647 83.186-106.667 0-58.002-60.165-102-116.531-102zM256 338c-25.365 0-46 20.635-46 46 0 25.364 20.635 46 46 46s46-20.636 46-46c0-25.365-20.635-46-46-46z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.wR = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 7184:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'table';
var width = 512;
var height = 512;
var ligatures = [];
var unicode = 'f0ce';
var svgPathData = 'M464 32H48C21.49 32 0 53.49 0 80v352c0 26.51 21.49 48 48 48h416c26.51 0 48-21.49 48-48V80c0-26.51-21.49-48-48-48zM224 416H64v-96h160v96zm0-160H64v-96h160v96zm224 160H288v-96h160v96zm0-160H288v-96h160v96z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.w9 = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 7882:
/***/ ((__unused_webpack_module, exports) => {

"use strict";
var __webpack_unused_export__;

__webpack_unused_export__ = ({ value: true });
var prefix = 'fas';
var iconName = 'times';
var width = 352;
var height = 512;
var ligatures = [];
var unicode = 'f00d';
var svgPathData = 'M242.72 256l100.07-100.07c12.28-12.28 12.28-32.19 0-44.48l-22.24-22.24c-12.28-12.28-32.19-12.28-44.48 0L176 189.28 75.93 89.21c-12.28-12.28-32.19-12.28-44.48 0L9.21 111.45c-12.28 12.28-12.28 32.19 0 44.48L109.28 256 9.21 356.07c-12.28 12.28-12.28 32.19 0 44.48l22.24 22.24c12.28 12.28 32.2 12.28 44.48 0L176 322.72l100.07 100.07c12.28 12.28 32.2 12.28 44.48 0l22.24-22.24c12.28-12.28 12.28-32.19 0-44.48L242.72 256z';

exports.mw = {
  prefix: prefix,
  iconName: iconName,
  icon: [
    width,
    height,
    ligatures,
    unicode,
    svgPathData
  ]};

exports.GR = exports.mw;
__webpack_unused_export__ = prefix;
__webpack_unused_export__ = iconName;
__webpack_unused_export__ = width;
__webpack_unused_export__ = height;
__webpack_unused_export__ = ligatures;
__webpack_unused_export__ = unicode;
__webpack_unused_export__ = svgPathData;

/***/ }),

/***/ 9704:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.ActivityMonitor = void 0;
const signaling_1 = __webpack_require__(3992);
/**
 * A class that monitors activity on a signal.
 */
class ActivityMonitor {
    /**
     * Construct a new activity monitor.
     */
    constructor(options) {
        this._timer = -1;
        this._timeout = -1;
        this._isDisposed = false;
        this._activityStopped = new signaling_1.Signal(this);
        options.signal.connect(this._onSignalFired, this);
        this._timeout = options.timeout || 1000;
    }
    /**
     * A signal emitted when activity has ceased.
     */
    get activityStopped() {
        return this._activityStopped;
    }
    /**
     * The timeout associated with the monitor, in milliseconds.
     */
    get timeout() {
        return this._timeout;
    }
    set timeout(value) {
        this._timeout = value;
    }
    /**
     * Test whether the monitor has been disposed.
     *
     * #### Notes
     * This is a read-only property.
     */
    get isDisposed() {
        return this._isDisposed;
    }
    /**
     * Dispose of the resources used by the activity monitor.
     */
    dispose() {
        if (this._isDisposed) {
            return;
        }
        this._isDisposed = true;
        signaling_1.Signal.clearData(this);
    }
    /**
     * A signal handler for the monitored signal.
     */
    _onSignalFired(sender, args) {
        clearTimeout(this._timer);
        this._sender = sender;
        this._args = args;
        this._timer = setTimeout(() => {
            this._activityStopped.emit({
                sender: this._sender,
                args: this._args
            });
        }, this._timeout);
    }
}
exports.ActivityMonitor = ActivityMonitor;
//# sourceMappingURL=activitymonitor.js.map

/***/ }),

/***/ 8925:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/**
 * @packageDocumentation
 * @module coreutils
 */
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __exportStar = (this && this.__exportStar) || function(m, exports) {
    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
__exportStar(__webpack_require__(9704), exports);
__exportStar(__webpack_require__(9269), exports);
__exportStar(__webpack_require__(1232), exports);
__exportStar(__webpack_require__(9547), exports);
__exportStar(__webpack_require__(5964), exports);
__exportStar(__webpack_require__(9830), exports);
__exportStar(__webpack_require__(7361), exports);
__exportStar(__webpack_require__(8126), exports);
__exportStar(__webpack_require__(1796), exports);
__exportStar(__webpack_require__(1692), exports);
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 9269:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
//# sourceMappingURL=interfaces.js.map

/***/ }),

/***/ 1232:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.LruCache = void 0;
const DEFAULT_MAX_SIZE = 128;
/** A least-recently-used cache. */
class LruCache {
    constructor(options = {}) {
        this._map = new Map();
        this._maxSize = (options === null || options === void 0 ? void 0 : options.maxSize) || DEFAULT_MAX_SIZE;
    }
    /**
     * Return the current size of the cache.
     */
    get size() {
        return this._map.size;
    }
    /**
     * Clear the values in the cache.
     */
    clear() {
        this._map.clear();
    }
    /**
     * Get a value (or null) from the cache, pushing the item to the front of the cache.
     */
    get(key) {
        const item = this._map.get(key) || null;
        if (item != null) {
            this._map.delete(key);
            this._map.set(key, item);
        }
        return item;
    }
    /**
     * Set a value in the cache, potentially evicting an old item.
     */
    set(key, value) {
        if (this._map.size >= this._maxSize) {
            this._map.delete(this._map.keys().next().value);
        }
        this._map.set(key, value);
    }
}
exports.LruCache = LruCache;
//# sourceMappingURL=lru.js.map

/***/ }),

/***/ 9547:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.MarkdownCodeBlocks = void 0;
/**
 * The namespace for code block functions which help
 * in extract code from markdown text
 */
var MarkdownCodeBlocks;
(function (MarkdownCodeBlocks) {
    MarkdownCodeBlocks.CODE_BLOCK_MARKER = '```';
    const markdownExtensions = [
        '.markdown',
        '.mdown',
        '.mkdn',
        '.md',
        '.mkd',
        '.mdwn',
        '.mdtxt',
        '.mdtext',
        '.text',
        '.txt',
        '.Rmd'
    ];
    class MarkdownCodeBlock {
        constructor(startLine) {
            this.startLine = startLine;
            this.code = '';
            this.endLine = -1;
        }
    }
    MarkdownCodeBlocks.MarkdownCodeBlock = MarkdownCodeBlock;
    /**
     * Check whether the given file extension is a markdown extension
     * @param extension - A file extension
     *
     * @returns true/false depending on whether this is a supported markdown extension
     */
    function isMarkdown(extension) {
        return markdownExtensions.indexOf(extension) > -1;
    }
    MarkdownCodeBlocks.isMarkdown = isMarkdown;
    /**
     * Construct all code snippets from current text
     * (this could be potentially optimized if we can cache and detect differences)
     * @param text - A string to parse codeblocks from
     *
     * @returns An array of MarkdownCodeBlocks.
     */
    function findMarkdownCodeBlocks(text) {
        if (!text || text === '') {
            return [];
        }
        const lines = text.split('\n');
        const codeBlocks = [];
        let currentBlock = null;
        for (let lineIndex = 0; lineIndex < lines.length; lineIndex++) {
            const line = lines[lineIndex];
            const lineContainsMarker = line.indexOf(MarkdownCodeBlocks.CODE_BLOCK_MARKER) === 0;
            const constructingBlock = currentBlock != null;
            // Skip this line if it is not part of any code block and doesn't contain a marker.
            if (!lineContainsMarker && !constructingBlock) {
                continue;
            }
            // Check if we are already constructing a code block.
            if (!constructingBlock) {
                // Start constructing a new code block.
                currentBlock = new MarkdownCodeBlock(lineIndex);
                // Check whether this is a single line code block of the form ```a = 10```.
                const firstIndex = line.indexOf(MarkdownCodeBlocks.CODE_BLOCK_MARKER);
                const lastIndex = line.lastIndexOf(MarkdownCodeBlocks.CODE_BLOCK_MARKER);
                const isSingleLine = firstIndex !== lastIndex;
                if (isSingleLine) {
                    currentBlock.code = line.substring(firstIndex + MarkdownCodeBlocks.CODE_BLOCK_MARKER.length, lastIndex);
                    currentBlock.endLine = lineIndex;
                    codeBlocks.push(currentBlock);
                    currentBlock = null;
                }
            }
            else if (currentBlock) {
                if (lineContainsMarker) {
                    // End of block, finish it up.
                    currentBlock.endLine = lineIndex - 1;
                    codeBlocks.push(currentBlock);
                    currentBlock = null;
                }
                else {
                    // Append the current line.
                    currentBlock.code += line + '\n';
                }
            }
        }
        return codeBlocks;
    }
    MarkdownCodeBlocks.findMarkdownCodeBlocks = findMarkdownCodeBlocks;
})(MarkdownCodeBlocks || (exports.MarkdownCodeBlocks = MarkdownCodeBlocks = {}));
//# sourceMappingURL=markdowncodeblocks.js.map

/***/ }),

/***/ 5964:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.PageConfig = void 0;
const coreutils_1 = __webpack_require__(5764);
const minimist_1 = __importDefault(__webpack_require__(9600));
const url_1 = __webpack_require__(1692);
/**
 * The namespace for `PageConfig` functions.
 */
var PageConfig;
(function (PageConfig) {
    /**
     * Get global configuration data for the Jupyter application.
     *
     * @param name - The name of the configuration option.
     *
     * @returns The config value or an empty string if not found.
     *
     * #### Notes
     * All values are treated as strings.
     * For browser based applications, it is assumed that the page HTML
     * includes a script tag with the id `jupyter-config-data` containing the
     * configuration as valid JSON.  In order to support the classic Notebook,
     * we fall back on checking for `body` data of the given `name`.
     *
     * For node applications, it is assumed that the process was launched
     * with a `--jupyter-config-data` option pointing to a JSON settings
     * file.
     */
    function getOption(name) {
        if (configData) {
            return configData[name] || getBodyData(name);
        }
        configData = Object.create(null);
        let found = false;
        // Use script tag if available.
        if (typeof document !== 'undefined' && document) {
            const el = document.getElementById('jupyter-config-data');
            if (el) {
                configData = JSON.parse(el.textContent || '');
                found = true;
            }
        }
        // Otherwise use CLI if given.
        if (!found && typeof process !== 'undefined' && process.argv) {
            try {
                const cli = (0, minimist_1.default)(process.argv.slice(2));
                const path = __webpack_require__(9942);
                let fullPath = '';
                if ('jupyter-config-data' in cli) {
                    fullPath = path.resolve(cli['jupyter-config-data']);
                }
                else if ('JUPYTER_CONFIG_DATA' in process.env) {
                    fullPath = path.resolve(process.env['JUPYTER_CONFIG_DATA']);
                }
                if (fullPath) {
                    // Force Webpack to ignore this require.
                    // eslint-disable-next-line
                    configData = eval('require')(fullPath);
                }
            }
            catch (e) {
                console.error(e);
            }
        }
        if (!coreutils_1.JSONExt.isObject(configData)) {
            configData = Object.create(null);
        }
        else {
            for (const key in configData) {
                // PageConfig expects strings
                if (typeof configData[key] !== 'string') {
                    configData[key] = JSON.stringify(configData[key]);
                }
            }
        }
        return configData[name] || getBodyData(name);
    }
    PageConfig.getOption = getOption;
    /**
     * Set global configuration data for the Jupyter application.
     *
     * @param name - The name of the configuration option.
     * @param value - The value to set the option to.
     *
     * @returns The last config value or an empty string if it doesn't exist.
     */
    function setOption(name, value) {
        const last = getOption(name);
        configData[name] = value;
        return last;
    }
    PageConfig.setOption = setOption;
    /**
     * Get the base url for a Jupyter application, or the base url of the page.
     */
    function getBaseUrl() {
        return url_1.URLExt.normalize(getOption('baseUrl') || '/');
    }
    PageConfig.getBaseUrl = getBaseUrl;
    /**
     * Get the tree url for a JupyterLab application.
     */
    function getTreeUrl() {
        return url_1.URLExt.join(getBaseUrl(), getOption('treeUrl'));
    }
    PageConfig.getTreeUrl = getTreeUrl;
    /**
     * Get the base url for sharing links (usually baseUrl)
     */
    function getShareUrl() {
        return url_1.URLExt.normalize(getOption('shareUrl') || getBaseUrl());
    }
    PageConfig.getShareUrl = getShareUrl;
    /**
     * Get the tree url for shareable links.
     * Usually the same as treeUrl,
     * but overridable e.g. when sharing with JupyterHub.
     */
    function getTreeShareUrl() {
        return url_1.URLExt.normalize(url_1.URLExt.join(getShareUrl(), getOption('treeUrl')));
    }
    PageConfig.getTreeShareUrl = getTreeShareUrl;
    /**
     * Create a new URL given an optional mode and tree path.
     *
     * This is used to create URLS when the mode or tree path change as the user
     * changes mode or the current document in the main area. If fields in
     * options are omitted, the value in PageConfig will be used.
     *
     * @param options - IGetUrlOptions for the new path.
     */
    function getUrl(options) {
        var _a, _b, _c, _d;
        let path = options.toShare ? getShareUrl() : getBaseUrl();
        const mode = (_a = options.mode) !== null && _a !== void 0 ? _a : getOption('mode');
        const workspace = (_b = options.workspace) !== null && _b !== void 0 ? _b : getOption('workspace');
        const labOrDoc = mode === 'single-document' ? 'doc' : 'lab';
        path = url_1.URLExt.join(path, labOrDoc);
        if (workspace !== PageConfig.defaultWorkspace) {
            path = url_1.URLExt.join(path, 'workspaces', encodeURIComponent((_c = getOption('workspace')) !== null && _c !== void 0 ? _c : PageConfig.defaultWorkspace));
        }
        const treePath = (_d = options.treePath) !== null && _d !== void 0 ? _d : getOption('treePath');
        if (treePath) {
            path = url_1.URLExt.join(path, 'tree', url_1.URLExt.encodeParts(treePath));
        }
        return path;
    }
    PageConfig.getUrl = getUrl;
    PageConfig.defaultWorkspace = 'default';
    /**
     * Get the base websocket url for a Jupyter application, or an empty string.
     */
    function getWsUrl(baseUrl) {
        let wsUrl = getOption('wsUrl');
        if (!wsUrl) {
            baseUrl = baseUrl ? url_1.URLExt.normalize(baseUrl) : getBaseUrl();
            if (baseUrl.indexOf('http') !== 0) {
                return '';
            }
            wsUrl = 'ws' + baseUrl.slice(4);
        }
        return url_1.URLExt.normalize(wsUrl);
    }
    PageConfig.getWsUrl = getWsUrl;
    /**
     * Returns the URL converting this notebook to a certain
     * format with nbconvert.
     */
    function getNBConvertURL({ path, format, download }) {
        const notebookPath = url_1.URLExt.encodeParts(path);
        const url = url_1.URLExt.join(getBaseUrl(), 'nbconvert', format, notebookPath);
        if (download) {
            return url + '?download=true';
        }
        return url;
    }
    PageConfig.getNBConvertURL = getNBConvertURL;
    /**
     * Get the authorization token for a Jupyter application.
     */
    function getToken() {
        return getOption('token') || getBodyData('jupyterApiToken');
    }
    PageConfig.getToken = getToken;
    /**
     * Get the Notebook version info [major, minor, patch].
     */
    function getNotebookVersion() {
        const notebookVersion = getOption('notebookVersion');
        if (notebookVersion === '') {
            return [0, 0, 0];
        }
        return JSON.parse(notebookVersion);
    }
    PageConfig.getNotebookVersion = getNotebookVersion;
    /**
     * Private page config data for the Jupyter application.
     */
    let configData = null;
    /**
     * Get a url-encoded item from `body.data` and decode it
     * We should never have any encoded URLs anywhere else in code
     * until we are building an actual request.
     */
    function getBodyData(key) {
        if (typeof document === 'undefined' || !document.body) {
            return '';
        }
        const val = document.body.dataset[key];
        if (typeof val === 'undefined') {
            return '';
        }
        return decodeURIComponent(val);
    }
    /**
     * The namespace for page config `Extension` functions.
     */
    let Extension;
    (function (Extension) {
        /**
         * Populate an array from page config.
         *
         * @param key - The page config key (e.g., `deferredExtensions`).
         *
         * #### Notes
         * This is intended for `deferredExtensions` and `disabledExtensions`.
         */
        function populate(key) {
            try {
                const raw = getOption(key);
                if (raw) {
                    return JSON.parse(raw);
                }
            }
            catch (error) {
                console.warn(`Unable to parse ${key}.`, error);
            }
            return [];
        }
        /**
         * The collection of deferred extensions in page config.
         */
        Extension.deferred = populate('deferredExtensions');
        /**
         * The collection of disabled extensions in page config.
         */
        Extension.disabled = populate('disabledExtensions');
        /**
         * Returns whether a plugin is deferred.
         *
         * @param id - The plugin ID.
         */
        function isDeferred(id) {
            // Check for either a full plugin id match or an extension
            // name match.
            const separatorIndex = id.indexOf(':');
            let extName = '';
            if (separatorIndex !== -1) {
                extName = id.slice(0, separatorIndex);
            }
            return Extension.deferred.some(val => val === id || (extName && val === extName));
        }
        Extension.isDeferred = isDeferred;
        /**
         * Returns whether a plugin is disabled.
         *
         * @param id - The plugin ID.
         */
        function isDisabled(id) {
            // Check for either a full plugin id match or an extension
            // name match.
            const separatorIndex = id.indexOf(':');
            let extName = '';
            if (separatorIndex !== -1) {
                extName = id.slice(0, separatorIndex);
            }
            return Extension.disabled.some(val => val === id || (extName && val === extName));
        }
        Extension.isDisabled = isDisabled;
    })(Extension = PageConfig.Extension || (PageConfig.Extension = {}));
})(PageConfig || (exports.PageConfig = PageConfig = {}));
//# sourceMappingURL=pageconfig.js.map

/***/ }),

/***/ 9830:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.PathExt = void 0;
const path_1 = __webpack_require__(9942);
/**
 * The namespace for path-related functions.
 *
 * Note that Jupyter server paths do not start with a leading slash.
 */
var PathExt;
(function (PathExt) {
    /**
     * Join all arguments together and normalize the resulting path.
     * Arguments must be strings. In v0.8, non-string arguments were silently ignored. In v0.10 and up, an exception is thrown.
     *
     * @param paths - The string paths to join.
     */
    function join(...paths) {
        const path = path_1.posix.join(...paths);
        return path === '.' ? '' : removeSlash(path);
    }
    PathExt.join = join;
    /**
     * Join all arguments together and normalize the resulting path and preserve the leading slash.
     *
     * @param paths - The string paths to join.
     */
    function joinWithLeadingSlash(...paths) {
        const path = path_1.posix.join(...paths);
        return path === '.' ? '' : path;
    }
    PathExt.joinWithLeadingSlash = joinWithLeadingSlash;
    /**
     * Return the last portion of a path. Similar to the Unix basename command.
     * Often used to extract the file name from a fully qualified path.
     *
     * @param path - The path to evaluate.
     *
     * @param ext - An extension to remove from the result.
     */
    function basename(path, ext) {
        return path_1.posix.basename(path, ext);
    }
    PathExt.basename = basename;
    /**
     * Get the directory name of a path, similar to the Unix dirname command.
     * When an empty path is given, returns the root path.
     *
     * @param path - The file path.
     */
    function dirname(path) {
        const dir = removeSlash(path_1.posix.dirname(path));
        return dir === '.' ? '' : dir;
    }
    PathExt.dirname = dirname;
    /**
     * Get the extension of the path.
     *
     * @param path - The file path.
     *
     * @returns the extension of the file.
     *
     * #### Notes
     * The extension is the string from the last occurrence of the `.`
     * character to end of string in the last portion of the path, inclusive.
     * If there is no `.` in the last portion of the path, or if the first
     * character of the basename of path [[basename]] is `.`, then an
     * empty string is returned.
     */
    function extname(path) {
        return path_1.posix.extname(path);
    }
    PathExt.extname = extname;
    /**
     * Normalize a string path, reducing '..' and '.' parts.
     * When multiple slashes are found, they're replaced by a single one; when the path contains a trailing slash, it is preserved. On Windows backslashes are used.
     * When an empty path is given, returns the root path.
     *
     * @param path - The string path to normalize.
     */
    function normalize(path) {
        if (path === '') {
            return '';
        }
        return removeSlash(path_1.posix.normalize(path));
    }
    PathExt.normalize = normalize;
    /**
     * Resolve a sequence of paths or path segments into an absolute path.
     * The root path in the application has no leading slash, so it is removed.
     *
     * @param parts - The paths to join.
     *
     * #### Notes
     * The right-most parameter is considered \{to\}.  Other parameters are considered an array of \{from\}.
     *
     * Starting from leftmost \{from\} parameter, resolves \{to\} to an absolute path.
     *
     * If \{to\} isn't already absolute, \{from\} arguments are prepended in right to left order, until an absolute path is found. If after using all \{from\} paths still no absolute path is found, the current working directory is used as well. The resulting path is normalized, and trailing slashes are removed unless the path gets resolved to the root directory.
     */
    function resolve(...parts) {
        return removeSlash(path_1.posix.resolve(...parts));
    }
    PathExt.resolve = resolve;
    /**
     * Solve the relative path from \{from\} to \{to\}.
     *
     * @param from - The source path.
     *
     * @param to - The target path.
     *
     * #### Notes
     * If from and to each resolve to the same path (after calling
     * path.resolve() on each), a zero-length string is returned.
     * If a zero-length string is passed as from or to, `/`
     * will be used instead of the zero-length strings.
     */
    function relative(from, to) {
        return removeSlash(path_1.posix.relative(from, to));
    }
    PathExt.relative = relative;
    /**
     * Normalize a file extension to be of the type `'.foo'`.
     *
     * @param extension - the file extension.
     *
     * #### Notes
     * Adds a leading dot if not present and converts to lower case.
     */
    function normalizeExtension(extension) {
        if (extension.length > 0 && extension.indexOf('.') !== 0) {
            extension = `.${extension}`;
        }
        return extension;
    }
    PathExt.normalizeExtension = normalizeExtension;
    /**
     * Remove the leading slash from a path.
     *
     * @param path the path from which to remove a leading slash.
     */
    function removeSlash(path) {
        if (path.indexOf('/') === 0) {
            path = path.slice(1);
        }
        return path;
    }
    PathExt.removeSlash = removeSlash;
})(PathExt || (exports.PathExt = PathExt = {}));
//# sourceMappingURL=path.js.map

/***/ }),

/***/ 7361:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

/*
 * Copyright (c) Jupyter Development Team.
 * Distributed under the terms of the Modified BSD License.
 */
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.signalToPromise = void 0;
const coreutils_1 = __webpack_require__(5764);
/**
 * Convert a signal into a promise for the first emitted value.
 *
 * @param signal - The signal we are listening to.
 * @param timeout - Timeout to wait for signal in ms (not timeout if not defined or 0)
 *
 * @returns a Promise that resolves with a `(sender, args)` pair.
 */
function signalToPromise(signal, timeout) {
    const waitForSignal = new coreutils_1.PromiseDelegate();
    function cleanup() {
        signal.disconnect(slot);
    }
    function slot(sender, args) {
        cleanup();
        waitForSignal.resolve([sender, args]);
    }
    signal.connect(slot);
    if ((timeout !== null && timeout !== void 0 ? timeout : 0) > 0) {
        setTimeout(() => {
            cleanup();
            waitForSignal.reject(`Signal not emitted within ${timeout} ms.`);
        }, timeout);
    }
    return waitForSignal.promise;
}
exports.signalToPromise = signalToPromise;
//# sourceMappingURL=signal.js.map

/***/ }),

/***/ 8126:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.Text = void 0;
/**
 * The namespace for text-related functions.
 */
var Text;
(function (Text) {
    // javascript stores text as utf16 and string indices use "code units",
    // which stores high-codepoint characters as "surrogate pairs",
    // which occupy two indices in the javascript string.
    // We need to translate cursor_pos in the Jupyter protocol (in characters)
    // to js offset (with surrogate pairs taking two spots).
    const HAS_SURROGATES = '𝐚'.length > 1;
    /**
     * Convert a javascript string index into a unicode character offset
     *
     * @param jsIdx - The javascript string index (counting surrogate pairs)
     *
     * @param text - The text in which the offset is calculated
     *
     * @returns The unicode character offset
     */
    function jsIndexToCharIndex(jsIdx, text) {
        if (HAS_SURROGATES) {
            // not using surrogates, nothing to do
            return jsIdx;
        }
        let charIdx = jsIdx;
        for (let i = 0; i + 1 < text.length && i < jsIdx; i++) {
            const charCode = text.charCodeAt(i);
            // check for surrogate pair
            if (charCode >= 0xd800 && charCode <= 0xdbff) {
                const nextCharCode = text.charCodeAt(i + 1);
                if (nextCharCode >= 0xdc00 && nextCharCode <= 0xdfff) {
                    charIdx--;
                    i++;
                }
            }
        }
        return charIdx;
    }
    Text.jsIndexToCharIndex = jsIndexToCharIndex;
    /**
     * Convert a unicode character offset to a javascript string index.
     *
     * @param charIdx - The index in unicode characters
     *
     * @param text - The text in which the offset is calculated
     *
     * @returns The js-native index
     */
    function charIndexToJsIndex(charIdx, text) {
        if (HAS_SURROGATES) {
            // not using surrogates, nothing to do
            return charIdx;
        }
        let jsIdx = charIdx;
        for (let i = 0; i + 1 < text.length && i < jsIdx; i++) {
            const charCode = text.charCodeAt(i);
            // check for surrogate pair
            if (charCode >= 0xd800 && charCode <= 0xdbff) {
                const nextCharCode = text.charCodeAt(i + 1);
                if (nextCharCode >= 0xdc00 && nextCharCode <= 0xdfff) {
                    jsIdx++;
                    i++;
                }
            }
        }
        return jsIdx;
    }
    Text.charIndexToJsIndex = charIndexToJsIndex;
    /**
     * Given a 'snake-case', 'snake_case', 'snake:case', or
     * 'snake case' string, will return the camel case version: 'snakeCase'.
     *
     * @param str the snake-case input string.
     *
     * @param upper default = false. If true, the first letter of the
     * returned string will be capitalized.
     *
     * @returns the camel case version of the input string.
     */
    function camelCase(str, upper = false) {
        return str.replace(/^(\w)|[\s-_:]+(\w)/g, function (match, p1, p2) {
            if (p2) {
                return p2.toUpperCase();
            }
            else {
                return upper ? p1.toUpperCase() : p1.toLowerCase();
            }
        });
    }
    Text.camelCase = camelCase;
    /**
     * Given a string, title case the words in the string.
     *
     * @param str the string to title case.
     *
     * @returns the same string, but with each word capitalized.
     */
    function titleCase(str) {
        return (str || '')
            .toLowerCase()
            .split(' ')
            .map(word => word.charAt(0).toUpperCase() + word.slice(1))
            .join(' ');
    }
    Text.titleCase = titleCase;
})(Text || (exports.Text = Text = {}));
//# sourceMappingURL=text.js.map

/***/ }),

/***/ 1796:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.Time = void 0;
/**
 * A list of time units with their associated value in milliseconds.
 */
const UNITS = [
    { name: 'years', milliseconds: 365 * 24 * 60 * 60 * 1000 },
    { name: 'months', milliseconds: 30 * 24 * 60 * 60 * 1000 },
    { name: 'days', milliseconds: 24 * 60 * 60 * 1000 },
    { name: 'hours', milliseconds: 60 * 60 * 1000 },
    { name: 'minutes', milliseconds: 60 * 1000 },
    { name: 'seconds', milliseconds: 1000 }
];
/**
 * The namespace for date functions.
 */
var Time;
(function (Time) {
    /**
     * Convert a timestring to a human readable string (e.g. 'two minutes ago').
     *
     * @param value - The date timestring or date object.
     *
     * @returns A formatted date.
     */
    function formatHuman(value, format = 'long') {
        const lang = document.documentElement.lang || 'en';
        const formatter = new Intl.RelativeTimeFormat(lang, {
            numeric: 'auto',
            style: format
        });
        const delta = new Date(value).getTime() - Date.now();
        for (let unit of UNITS) {
            const amount = Math.ceil(delta / unit.milliseconds);
            if (amount === 0) {
                continue;
            }
            return formatter.format(amount, unit.name);
        }
        return formatter.format(0, 'seconds');
    }
    Time.formatHuman = formatHuman;
    /**
     * Convenient helper to convert a timestring to a date format.
     *
     * @param value - The date timestring or date object.
     *
     * @returns A formatted date.
     */
    function format(value) {
        const lang = document.documentElement.lang || 'en';
        const formatter = new Intl.DateTimeFormat(lang, {
            dateStyle: 'short',
            timeStyle: 'short'
        });
        return formatter.format(new Date(value));
    }
    Time.format = format;
})(Time || (exports.Time = Time = {}));
//# sourceMappingURL=time.js.map

/***/ }),

/***/ 1692:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.URLExt = void 0;
const path_1 = __webpack_require__(9942);
const url_parse_1 = __importDefault(__webpack_require__(2225));
/**
 * The namespace for URL-related functions.
 */
var URLExt;
(function (URLExt) {
    /**
     * Parse a url into a URL object.
     *
     * @param url - The URL string to parse.
     *
     * @returns A URL object.
     */
    function parse(url) {
        if (typeof document !== 'undefined' && document) {
            const a = document.createElement('a');
            a.href = url;
            return a;
        }
        return (0, url_parse_1.default)(url);
    }
    URLExt.parse = parse;
    /**
     * Parse URL and retrieve hostname
     *
     * @param url - The URL string to parse
     *
     * @returns a hostname string value
     */
    function getHostName(url) {
        return (0, url_parse_1.default)(url).hostname;
    }
    URLExt.getHostName = getHostName;
    function normalize(url) {
        return url && parse(url).toString();
    }
    URLExt.normalize = normalize;
    /**
     * Join a sequence of url components and normalizes as in node `path.join`.
     *
     * @param parts - The url components.
     *
     * @returns the joined url.
     */
    function join(...parts) {
        let u = (0, url_parse_1.default)(parts[0], {});
        // Schema-less URL can be only parsed as relative to a base URL
        // see https://github.com/unshiftio/url-parse/issues/219#issuecomment-1002219326
        const isSchemaLess = u.protocol === '' && u.slashes;
        if (isSchemaLess) {
            u = (0, url_parse_1.default)(parts[0], 'https:' + parts[0]);
        }
        const prefix = `${isSchemaLess ? '' : u.protocol}${u.slashes ? '//' : ''}${u.auth}${u.auth ? '@' : ''}${u.host}`;
        // If there was a prefix, then the first path must start at the root.
        const path = path_1.posix.join(`${!!prefix && u.pathname[0] !== '/' ? '/' : ''}${u.pathname}`, ...parts.slice(1));
        return `${prefix}${path === '.' ? '' : path}`;
    }
    URLExt.join = join;
    /**
     * Encode the components of a multi-segment url.
     *
     * @param url - The url to encode.
     *
     * @returns the encoded url.
     *
     * #### Notes
     * Preserves the `'/'` separators.
     * Should not include the base url, since all parts are escaped.
     */
    function encodeParts(url) {
        return join(...url.split('/').map(encodeURIComponent));
    }
    URLExt.encodeParts = encodeParts;
    /**
     * Return a serialized object string suitable for a query.
     *
     * @param value The source object.
     *
     * @returns an encoded url query.
     *
     * #### Notes
     * Modified version of [stackoverflow](http://stackoverflow.com/a/30707423).
     */
    function objectToQueryString(value) {
        const keys = Object.keys(value).filter(key => key.length > 0);
        if (!keys.length) {
            return '';
        }
        return ('?' +
            keys
                .map(key => {
                const content = encodeURIComponent(String(value[key]));
                return key + (content ? '=' + content : '');
            })
                .join('&'));
    }
    URLExt.objectToQueryString = objectToQueryString;
    /**
     * Return a parsed object that represents the values in a query string.
     */
    function queryStringToObject(value) {
        return value
            .replace(/^\?/, '')
            .split('&')
            .reduce((acc, val) => {
            const [key, value] = val.split('=');
            if (key.length > 0) {
                acc[key] = decodeURIComponent(value || '');
            }
            return acc;
        }, {});
    }
    URLExt.queryStringToObject = queryStringToObject;
    /**
     * Test whether the url is a local url.
     *
     * @param allowRoot - Whether the paths starting at Unix-style filesystem root (`/`) are permitted.
     *
     * #### Notes
     * This function returns `false` for any fully qualified url, including
     * `data:`, `file:`, and `//` protocol URLs.
     */
    function isLocal(url, allowRoot = false) {
        const { protocol } = parse(url);
        return ((!protocol || url.toLowerCase().indexOf(protocol) !== 0) &&
            (allowRoot ? url.indexOf('//') !== 0 : url.indexOf('/') !== 0));
    }
    URLExt.isLocal = isLocal;
})(URLExt || (exports.URLExt = URLExt = {}));
//# sourceMappingURL=url.js.map

/***/ }),

/***/ 3867:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.BaseManager = void 0;
const signaling_1 = __webpack_require__(3992);
const serverconnection_1 = __webpack_require__(2920);
class BaseManager {
    constructor(options) {
        var _a;
        this._isDisposed = false;
        this._disposed = new signaling_1.Signal(this);
        this.serverSettings =
            (_a = options.serverSettings) !== null && _a !== void 0 ? _a : serverconnection_1.ServerConnection.makeSettings();
    }
    /**
     * A signal emitted when the delegate is disposed.
     */
    get disposed() {
        return this._disposed;
    }
    /**
     * Test whether the delegate has been disposed.
     */
    get isDisposed() {
        return this._isDisposed;
    }
    /**
     * Whether the manager is active.
     */
    get isActive() {
        return true;
    }
    /**
     * Dispose of the delegate and invoke the callback function.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._isDisposed = true;
        this._disposed.emit(undefined);
        signaling_1.Signal.clearData(this);
    }
}
exports.BaseManager = BaseManager;
//# sourceMappingURL=basemanager.js.map

/***/ }),

/***/ 4219:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.BuildManager = void 0;
const coreutils_1 = __webpack_require__(8925);
const serverconnection_1 = __webpack_require__(2920);
/**
 * The url for the lab build service.
 */
const BUILD_SETTINGS_URL = 'api/build';
/**
 * The build API service manager.
 */
class BuildManager {
    /**
     * Create a new setting manager.
     */
    constructor(options = {}) {
        var _a;
        this._url = '';
        this.serverSettings =
            (_a = options.serverSettings) !== null && _a !== void 0 ? _a : serverconnection_1.ServerConnection.makeSettings();
        const { baseUrl, appUrl } = this.serverSettings;
        this._url = coreutils_1.URLExt.join(baseUrl, appUrl, BUILD_SETTINGS_URL);
    }
    /**
     * Test whether the build service is available.
     */
    get isAvailable() {
        return coreutils_1.PageConfig.getOption('buildAvailable').toLowerCase() === 'true';
    }
    /**
     * Test whether to check build status automatically.
     */
    get shouldCheck() {
        return coreutils_1.PageConfig.getOption('buildCheck').toLowerCase() === 'true';
    }
    /**
     * Get whether the application should be built.
     */
    getStatus() {
        const { _url, serverSettings } = this;
        const promise = serverconnection_1.ServerConnection.makeRequest(_url, {}, serverSettings);
        return promise
            .then(response => {
            if (response.status !== 200) {
                throw new serverconnection_1.ServerConnection.ResponseError(response);
            }
            return response.json();
        })
            .then(data => {
            if (typeof data.status !== 'string') {
                throw new Error('Invalid data');
            }
            if (typeof data.message !== 'string') {
                throw new Error('Invalid data');
            }
            return data;
        });
    }
    /**
     * Build the application.
     */
    build() {
        const { _url, serverSettings } = this;
        const init = { method: 'POST' };
        const promise = serverconnection_1.ServerConnection.makeRequest(_url, init, serverSettings);
        return promise.then(response => {
            if (response.status === 400) {
                throw new serverconnection_1.ServerConnection.ResponseError(response, 'Build aborted');
            }
            if (response.status !== 200) {
                const message = `Build failed with ${response.status}.

        If you are experiencing the build failure after installing an extension (or trying to include previously installed extension after updating JupyterLab) please check the extension repository for new installation instructions as many extensions migrated to the prebuilt extensions system which no longer requires rebuilding JupyterLab (but uses a different installation procedure, typically involving a package manager such as 'pip' or 'conda').

        If you specifically intended to install a source extension, please run 'jupyter lab build' on the server for full output.`;
                throw new serverconnection_1.ServerConnection.ResponseError(response, message);
            }
        });
    }
    /**
     * Cancel an active build.
     */
    cancel() {
        const { _url, serverSettings } = this;
        const init = { method: 'DELETE' };
        const promise = serverconnection_1.ServerConnection.makeRequest(_url, init, serverSettings);
        return promise.then(response => {
            if (response.status !== 204) {
                throw new serverconnection_1.ServerConnection.ResponseError(response);
            }
        });
    }
}
exports.BuildManager = BuildManager;
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 2170:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.ConfigWithDefaults = exports.ConfigSection = void 0;
const coreutils_1 = __webpack_require__(8925);
const __1 = __webpack_require__(7883);
/**
 * The url for the config service.
 */
const SERVICE_CONFIG_URL = 'api/config';
/**
 * The namespace for ConfigSection statics.
 */
var ConfigSection;
(function (ConfigSection) {
    /**
     * Create a config section.
     *
     * @returns A Promise that is fulfilled with the config section is loaded.
     */
    function create(options) {
        const section = new DefaultConfigSection(options);
        return section.load().then(() => {
            return section;
        });
    }
    ConfigSection.create = create;
})(ConfigSection || (exports.ConfigSection = ConfigSection = {}));
/**
 * Implementation of the Configurable data section.
 */
class DefaultConfigSection {
    /**
     * Construct a new config section.
     */
    constructor(options) {
        var _a;
        this._url = 'unknown';
        const settings = (this.serverSettings =
            (_a = options.serverSettings) !== null && _a !== void 0 ? _a : __1.ServerConnection.makeSettings());
        this._url = coreutils_1.URLExt.join(settings.baseUrl, SERVICE_CONFIG_URL, encodeURIComponent(options.name));
    }
    /**
     * Get the data for this section.
     */
    get data() {
        return this._data;
    }
    /**
     * Load the initial data for this section.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/config).
     *
     * The promise is fulfilled on a valid response and rejected otherwise.
     */
    async load() {
        const response = await __1.ServerConnection.makeRequest(this._url, {}, this.serverSettings);
        if (response.status !== 200) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        this._data = await response.json();
    }
    /**
     * Modify the stored config values.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/config).
     *
     * The promise is fulfilled on a valid response and rejected otherwise.
     *
     * Updates the local data immediately, sends the change to the server,
     * and updates the local data with the response, and fulfils the promise
     * with that data.
     */
    async update(newdata) {
        this._data = { ...this._data, ...newdata };
        const init = {
            method: 'PATCH',
            body: JSON.stringify(newdata)
        };
        const response = await __1.ServerConnection.makeRequest(this._url, init, this.serverSettings);
        if (response.status !== 200) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        this._data = await response.json();
        return this._data;
    }
}
/**
 * Configurable object with defaults.
 */
class ConfigWithDefaults {
    /**
     * Create a new config with defaults.
     */
    constructor(options) {
        var _a, _b;
        this._className = '';
        this._section = options.section;
        this._defaults = (_a = options.defaults) !== null && _a !== void 0 ? _a : {};
        this._className = (_b = options.className) !== null && _b !== void 0 ? _b : '';
    }
    /**
     * Get data from the config section or fall back to defaults.
     */
    get(key) {
        const data = this._classData();
        return key in data ? data[key] : this._defaults[key];
    }
    /**
     * Set a config value.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/config).
     *
     * The promise is fulfilled on a valid response and rejected otherwise.
     *
     * Sends the update to the server, and changes our local copy of the data
     * immediately.
     */
    set(key, value) {
        const d = {};
        d[key] = value;
        if (this._className) {
            const d2 = {};
            d2[this._className] = d;
            return this._section.update(d2);
        }
        else {
            return this._section.update(d);
        }
    }
    /**
     * Get data from the Section with our classname, if available.
     *
     * #### Notes
     * If we have no classname, get all of the data in the Section
     */
    _classData() {
        const data = this._section.data;
        if (this._className && this._className in data) {
            return data[this._className];
        }
        return data;
    }
}
exports.ConfigWithDefaults = ConfigWithDefaults;
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 8790:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.Drive = exports.ContentsManager = exports.Contents = void 0;
const coreutils_1 = __webpack_require__(8925);
const signaling_1 = __webpack_require__(3992);
const __1 = __webpack_require__(7883);
const validate = __importStar(__webpack_require__(2706));
/**
 * The url for the default drive service.
 */
const SERVICE_DRIVE_URL = 'api/contents';
/**
 * The url for the file access.
 */
const FILES_URL = 'files';
/**
 * A namespace for contents interfaces.
 */
var Contents;
(function (Contents) {
    /**
     * Validates an IModel, throwing an error if it does not pass.
     */
    function validateContentsModel(contents) {
        validate.validateContentsModel(contents);
    }
    Contents.validateContentsModel = validateContentsModel;
    /**
     * Validates an ICheckpointModel, throwing an error if it does not pass.
     */
    function validateCheckpointModel(checkpoint) {
        validate.validateCheckpointModel(checkpoint);
    }
    Contents.validateCheckpointModel = validateCheckpointModel;
})(Contents || (exports.Contents = Contents = {}));
/**
 * A contents manager that passes file operations to the server.
 * Multiple servers implementing the `IDrive` interface can be
 * attached to the contents manager, so that the same session can
 * perform file operations on multiple backends.
 *
 * This includes checkpointing with the normal file operations.
 */
class ContentsManager {
    /**
     * Construct a new contents manager object.
     *
     * @param options - The options used to initialize the object.
     */
    constructor(options = {}) {
        var _a, _b;
        this._isDisposed = false;
        this._additionalDrives = new Map();
        this._fileChanged = new signaling_1.Signal(this);
        const serverSettings = (this.serverSettings =
            (_a = options.serverSettings) !== null && _a !== void 0 ? _a : __1.ServerConnection.makeSettings());
        this._defaultDrive = (_b = options.defaultDrive) !== null && _b !== void 0 ? _b : new Drive({ serverSettings });
        this._defaultDrive.fileChanged.connect(this._onFileChanged, this);
    }
    /**
     * A signal emitted when a file operation takes place.
     */
    get fileChanged() {
        return this._fileChanged;
    }
    /**
     * Test whether the manager has been disposed.
     */
    get isDisposed() {
        return this._isDisposed;
    }
    /**
     * Dispose of the resources held by the manager.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._isDisposed = true;
        signaling_1.Signal.clearData(this);
    }
    /**
     * Add an `IDrive` to the manager.
     */
    addDrive(drive) {
        this._additionalDrives.set(drive.name, drive);
        drive.fileChanged.connect(this._onFileChanged, this);
    }
    /**
     * Given a path, get a shared model factory from the
     * relevant backend. Returns `null` if the backend
     * does not provide one.
     */
    getSharedModelFactory(path) {
        var _a;
        const [drive] = this._driveForPath(path);
        return (_a = drive === null || drive === void 0 ? void 0 : drive.sharedModelFactory) !== null && _a !== void 0 ? _a : null;
    }
    /**
     * Given a path of the form `drive:local/portion/of/it.txt`
     * get the local part of it.
     *
     * @param path the path.
     *
     * @returns The local part of the path.
     */
    localPath(path) {
        const parts = path.split('/');
        const firstParts = parts[0].split(':');
        if (firstParts.length === 1 || !this._additionalDrives.has(firstParts[0])) {
            return coreutils_1.PathExt.removeSlash(path);
        }
        return coreutils_1.PathExt.join(firstParts.slice(1).join(':'), ...parts.slice(1));
    }
    /**
     * Normalize a global path. Reduces '..' and '.' parts, and removes
     * leading slashes from the local part of the path, while retaining
     * the drive name if it exists.
     *
     * @param path the path.
     *
     * @returns The normalized path.
     */
    normalize(path) {
        const parts = path.split(':');
        if (parts.length === 1) {
            return coreutils_1.PathExt.normalize(path);
        }
        return `${parts[0]}:${coreutils_1.PathExt.normalize(parts.slice(1).join(':'))}`;
    }
    /**
     * Resolve a global path, starting from the root path. Behaves like
     * posix-path.resolve, with 3 differences:
     *  - will never prepend cwd
     *  - if root has a drive name, the result is prefixed with "<drive>:"
     *  - before adding drive name, leading slashes are removed
     *
     * @param path the path.
     *
     * @returns The normalized path.
     */
    resolvePath(root, path) {
        const driveName = this.driveName(root);
        const localPath = this.localPath(root);
        const resolved = coreutils_1.PathExt.resolve('/', localPath, path);
        return driveName ? `${driveName}:${resolved}` : resolved;
    }
    /**
     * Given a path of the form `drive:local/portion/of/it.txt`
     * get the name of the drive. If the path is missing
     * a drive portion, returns an empty string.
     *
     * @param path the path.
     *
     * @returns The drive name for the path, or the empty string.
     */
    driveName(path) {
        const parts = path.split('/');
        const firstParts = parts[0].split(':');
        if (firstParts.length === 1) {
            return '';
        }
        if (this._additionalDrives.has(firstParts[0])) {
            return firstParts[0];
        }
        return '';
    }
    /**
     * Get a file or directory.
     *
     * @param path The path to the file.
     *
     * @param options The options used to fetch the file.
     *
     * @returns A promise which resolves with the file content.
     */
    get(path, options) {
        const [drive, localPath] = this._driveForPath(path);
        return drive.get(localPath, options).then(contentsModel => {
            const listing = [];
            if (contentsModel.type === 'directory' && contentsModel.content) {
                for (const item of contentsModel.content) {
                    listing.push({ ...item, path: this._toGlobalPath(drive, item.path) });
                }
                return {
                    ...contentsModel,
                    path: this._toGlobalPath(drive, localPath),
                    content: listing,
                    serverPath: contentsModel.path
                };
            }
            else {
                return {
                    ...contentsModel,
                    path: this._toGlobalPath(drive, localPath),
                    serverPath: contentsModel.path
                };
            }
        });
    }
    /**
     * Get an encoded download url given a file path.
     *
     * @param path - An absolute POSIX file path on the server.
     *
     * #### Notes
     * It is expected that the path contains no relative paths.
     *
     * The returned URL may include a query parameter.
     */
    getDownloadUrl(path) {
        const [drive, localPath] = this._driveForPath(path);
        return drive.getDownloadUrl(localPath);
    }
    /**
     * Create a new untitled file or directory in the specified directory path.
     *
     * @param options The options used to create the file.
     *
     * @returns A promise which resolves with the created file content when the
     *    file is created.
     */
    newUntitled(options = {}) {
        if (options.path) {
            const globalPath = this.normalize(options.path);
            const [drive, localPath] = this._driveForPath(globalPath);
            return drive
                .newUntitled({ ...options, path: localPath })
                .then(contentsModel => {
                return {
                    ...contentsModel,
                    path: coreutils_1.PathExt.join(globalPath, contentsModel.name),
                    serverPath: contentsModel.path
                };
            });
        }
        else {
            return this._defaultDrive.newUntitled(options);
        }
    }
    /**
     * Delete a file.
     *
     * @param path - The path to the file.
     *
     * @returns A promise which resolves when the file is deleted.
     */
    delete(path) {
        const [drive, localPath] = this._driveForPath(path);
        return drive.delete(localPath);
    }
    /**
     * Rename a file or directory.
     *
     * @param path - The original file path.
     *
     * @param newPath - The new file path.
     *
     * @returns A promise which resolves with the new file contents model when
     *   the file is renamed.
     */
    rename(path, newPath) {
        const [drive1, path1] = this._driveForPath(path);
        const [drive2, path2] = this._driveForPath(newPath);
        if (drive1 !== drive2) {
            throw Error('ContentsManager: renaming files must occur within a Drive');
        }
        return drive1.rename(path1, path2).then(contentsModel => {
            return {
                ...contentsModel,
                path: this._toGlobalPath(drive1, path2),
                serverPath: contentsModel.path
            };
        });
    }
    /**
     * Save a file.
     *
     * @param path - The desired file path.
     *
     * @param options - Optional overrides to the model.
     *
     * @returns A promise which resolves with the file content model when the
     *   file is saved.
     *
     * #### Notes
     * Ensure that `model.content` is populated for the file.
     */
    save(path, options = {}) {
        const globalPath = this.normalize(path);
        const [drive, localPath] = this._driveForPath(path);
        return drive
            .save(localPath, { ...options, path: localPath })
            .then(contentsModel => {
            return {
                ...contentsModel,
                path: globalPath,
                serverPath: contentsModel.path
            };
        });
    }
    /**
     * Copy a file into a given directory.
     *
     * @param path - The original file path.
     *
     * @param toDir - The destination directory path.
     *
     * @returns A promise which resolves with the new contents model when the
     *  file is copied.
     *
     * #### Notes
     * The server will select the name of the copied file.
     */
    copy(fromFile, toDir) {
        const [drive1, path1] = this._driveForPath(fromFile);
        const [drive2, path2] = this._driveForPath(toDir);
        if (drive1 === drive2) {
            return drive1.copy(path1, path2).then(contentsModel => {
                return {
                    ...contentsModel,
                    path: this._toGlobalPath(drive1, contentsModel.path),
                    serverPath: contentsModel.path
                };
            });
        }
        else {
            throw Error('Copying files between drives is not currently implemented');
        }
    }
    /**
     * Create a checkpoint for a file.
     *
     * @param path - The path of the file.
     *
     * @returns A promise which resolves with the new checkpoint model when the
     *   checkpoint is created.
     */
    createCheckpoint(path) {
        const [drive, localPath] = this._driveForPath(path);
        return drive.createCheckpoint(localPath);
    }
    /**
     * List available checkpoints for a file.
     *
     * @param path - The path of the file.
     *
     * @returns A promise which resolves with a list of checkpoint models for
     *    the file.
     */
    listCheckpoints(path) {
        const [drive, localPath] = this._driveForPath(path);
        return drive.listCheckpoints(localPath);
    }
    /**
     * Restore a file to a known checkpoint state.
     *
     * @param path - The path of the file.
     *
     * @param checkpointID - The id of the checkpoint to restore.
     *
     * @returns A promise which resolves when the checkpoint is restored.
     */
    restoreCheckpoint(path, checkpointID) {
        const [drive, localPath] = this._driveForPath(path);
        return drive.restoreCheckpoint(localPath, checkpointID);
    }
    /**
     * Delete a checkpoint for a file.
     *
     * @param path - The path of the file.
     *
     * @param checkpointID - The id of the checkpoint to delete.
     *
     * @returns A promise which resolves when the checkpoint is deleted.
     */
    deleteCheckpoint(path, checkpointID) {
        const [drive, localPath] = this._driveForPath(path);
        return drive.deleteCheckpoint(localPath, checkpointID);
    }
    /**
     * Given a drive and a local path, construct a fully qualified
     * path. The inverse of `_driveForPath`.
     *
     * @param drive an `IDrive`.
     *
     * @param localPath the local path on the drive.
     *
     * @returns the fully qualified path.
     */
    _toGlobalPath(drive, localPath) {
        if (drive === this._defaultDrive) {
            return coreutils_1.PathExt.removeSlash(localPath);
        }
        else {
            return `${drive.name}:${coreutils_1.PathExt.removeSlash(localPath)}`;
        }
    }
    /**
     * Given a path, get the `IDrive to which it refers,
     * where the path satisfies the pattern
     * `'driveName:path/to/file'`. If there is no `driveName`
     * prepended to the path, it returns the default drive.
     *
     * @param path a path to a file.
     *
     * @returns A tuple containing an `IDrive` object for the path,
     * and a local path for that drive.
     */
    _driveForPath(path) {
        const driveName = this.driveName(path);
        const localPath = this.localPath(path);
        if (driveName) {
            return [this._additionalDrives.get(driveName), localPath];
        }
        else {
            return [this._defaultDrive, localPath];
        }
    }
    /**
     * Respond to fileChanged signals from the drives attached to
     * the manager. This prepends the drive name to the path if necessary,
     * and then forwards the signal.
     */
    _onFileChanged(sender, args) {
        var _a, _b;
        if (sender === this._defaultDrive) {
            this._fileChanged.emit(args);
        }
        else {
            let newValue = null;
            let oldValue = null;
            if ((_a = args.newValue) === null || _a === void 0 ? void 0 : _a.path) {
                newValue = {
                    ...args.newValue,
                    path: this._toGlobalPath(sender, args.newValue.path)
                };
            }
            if ((_b = args.oldValue) === null || _b === void 0 ? void 0 : _b.path) {
                oldValue = {
                    ...args.oldValue,
                    path: this._toGlobalPath(sender, args.oldValue.path)
                };
            }
            this._fileChanged.emit({
                type: args.type,
                newValue,
                oldValue
            });
        }
    }
}
exports.ContentsManager = ContentsManager;
/**
 * A default implementation for an `IDrive`, talking to the
 * server using the Jupyter REST API.
 */
class Drive {
    /**
     * Construct a new contents manager object.
     *
     * @param options - The options used to initialize the object.
     */
    constructor(options = {}) {
        var _a, _b, _c;
        this._isDisposed = false;
        this._fileChanged = new signaling_1.Signal(this);
        this.name = (_a = options.name) !== null && _a !== void 0 ? _a : 'Default';
        this._apiEndpoint = (_b = options.apiEndpoint) !== null && _b !== void 0 ? _b : SERVICE_DRIVE_URL;
        this.serverSettings =
            (_c = options.serverSettings) !== null && _c !== void 0 ? _c : __1.ServerConnection.makeSettings();
    }
    /**
     * A signal emitted when a file operation takes place.
     */
    get fileChanged() {
        return this._fileChanged;
    }
    /**
     * Test whether the manager has been disposed.
     */
    get isDisposed() {
        return this._isDisposed;
    }
    /**
     * Dispose of the resources held by the manager.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._isDisposed = true;
        signaling_1.Signal.clearData(this);
    }
    /**
     * Get a file or directory.
     *
     * @param localPath The path to the file.
     *
     * @param options The options used to fetch the file.
     *
     * @returns A promise which resolves with the file content.
     *
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/contents) and validates the response model.
     */
    async get(localPath, options) {
        let url = this._getUrl(localPath);
        if (options) {
            // The notebook type cannot take an format option.
            if (options.type === 'notebook') {
                delete options['format'];
            }
            const content = options.content ? '1' : '0';
            const hash = options.hash ? '1' : '0';
            const params = { ...options, content, hash };
            url += coreutils_1.URLExt.objectToQueryString(params);
        }
        const settings = this.serverSettings;
        const response = await __1.ServerConnection.makeRequest(url, {}, settings);
        if (response.status !== 200) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        const data = await response.json();
        validate.validateContentsModel(data);
        return data;
    }
    /**
     * Get an encoded download url given a file path.
     *
     * @param localPath - An absolute POSIX file path on the server.
     *
     * #### Notes
     * It is expected that the path contains no relative paths.
     *
     * The returned URL may include a query parameter.
     */
    getDownloadUrl(localPath) {
        const baseUrl = this.serverSettings.baseUrl;
        let url = coreutils_1.URLExt.join(baseUrl, FILES_URL, coreutils_1.URLExt.encodeParts(localPath));
        let cookie = '';
        try {
            cookie = document.cookie;
        }
        catch (e) {
            // e.g. SecurityError in case of CSP Sandbox
        }
        const xsrfTokenMatch = cookie.match('\\b_xsrf=([^;]*)\\b');
        if (xsrfTokenMatch) {
            const fullUrl = new URL(url);
            fullUrl.searchParams.append('_xsrf', xsrfTokenMatch[1]);
            url = fullUrl.toString();
        }
        return Promise.resolve(url);
    }
    /**
     * Create a new untitled file or directory in the specified directory path.
     *
     * @param options The options used to create the file.
     *
     * @returns A promise which resolves with the created file content when the
     *    file is created.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/contents) and validates the response model.
     */
    async newUntitled(options = {}) {
        var _a;
        let body = '{}';
        if (options) {
            if (options.ext) {
                options.ext = Private.normalizeExtension(options.ext);
            }
            body = JSON.stringify(options);
        }
        const settings = this.serverSettings;
        const url = this._getUrl((_a = options.path) !== null && _a !== void 0 ? _a : '');
        const init = {
            method: 'POST',
            body
        };
        const response = await __1.ServerConnection.makeRequest(url, init, settings);
        if (response.status !== 201) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        const data = await response.json();
        validate.validateContentsModel(data);
        this._fileChanged.emit({
            type: 'new',
            oldValue: null,
            newValue: data
        });
        return data;
    }
    /**
     * Delete a file.
     *
     * @param localPath - The path to the file.
     *
     * @returns A promise which resolves when the file is deleted.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/contents).
     */
    async delete(localPath) {
        const url = this._getUrl(localPath);
        const settings = this.serverSettings;
        const init = { method: 'DELETE' };
        const response = await __1.ServerConnection.makeRequest(url, init, settings);
        // TODO: update IPEP27 to specify errors more precisely, so
        // that error types can be detected here with certainty.
        if (response.status !== 204) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        this._fileChanged.emit({
            type: 'delete',
            oldValue: { path: localPath },
            newValue: null
        });
    }
    /**
     * Rename a file or directory.
     *
     * @param oldLocalPath - The original file path.
     *
     * @param newLocalPath - The new file path.
     *
     * @returns A promise which resolves with the new file contents model when
     *   the file is renamed.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/contents) and validates the response model.
     */
    async rename(oldLocalPath, newLocalPath) {
        const settings = this.serverSettings;
        const url = this._getUrl(oldLocalPath);
        const init = {
            method: 'PATCH',
            body: JSON.stringify({ path: newLocalPath })
        };
        const response = await __1.ServerConnection.makeRequest(url, init, settings);
        if (response.status !== 200) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        const data = await response.json();
        validate.validateContentsModel(data);
        this._fileChanged.emit({
            type: 'rename',
            oldValue: { path: oldLocalPath },
            newValue: data
        });
        return data;
    }
    /**
     * Save a file.
     *
     * @param localPath - The desired file path.
     *
     * @param options - Optional overrides to the model.
     *
     * @returns A promise which resolves with the file content model when the
     *   file is saved.
     *
     * #### Notes
     * Ensure that `model.content` is populated for the file.
     *
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/contents) and validates the response model.
     */
    async save(localPath, options = {}) {
        const settings = this.serverSettings;
        const url = this._getUrl(localPath);
        const init = {
            method: 'PUT',
            body: JSON.stringify(options)
        };
        const response = await __1.ServerConnection.makeRequest(url, init, settings);
        // will return 200 for an existing file and 201 for a new file
        if (response.status !== 200 && response.status !== 201) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        const data = await response.json();
        validate.validateContentsModel(data);
        this._fileChanged.emit({
            type: 'save',
            oldValue: null,
            newValue: data
        });
        return data;
    }
    /**
     * Copy a file into a given directory.
     *
     * @param localPath - The original file path.
     *
     * @param toDir - The destination directory path.
     *
     * @returns A promise which resolves with the new contents model when the
     *  file is copied.
     *
     * #### Notes
     * The server will select the name of the copied file.
     *
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/contents) and validates the response model.
     */
    async copy(fromFile, toDir) {
        const settings = this.serverSettings;
        const url = this._getUrl(toDir);
        const init = {
            method: 'POST',
            body: JSON.stringify({ copy_from: fromFile })
        };
        const response = await __1.ServerConnection.makeRequest(url, init, settings);
        if (response.status !== 201) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        const data = await response.json();
        validate.validateContentsModel(data);
        this._fileChanged.emit({
            type: 'new',
            oldValue: null,
            newValue: data
        });
        return data;
    }
    /**
     * Create a checkpoint for a file.
     *
     * @param localPath - The path of the file.
     *
     * @returns A promise which resolves with the new checkpoint model when the
     *   checkpoint is created.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/contents) and validates the response model.
     */
    async createCheckpoint(localPath) {
        const url = this._getUrl(localPath, 'checkpoints');
        const init = { method: 'POST' };
        const response = await __1.ServerConnection.makeRequest(url, init, this.serverSettings);
        if (response.status !== 201) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        const data = await response.json();
        validate.validateCheckpointModel(data);
        return data;
    }
    /**
     * List available checkpoints for a file.
     *
     * @param localPath - The path of the file.
     *
     * @returns A promise which resolves with a list of checkpoint models for
     *    the file.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/contents) and validates the response model.
     */
    async listCheckpoints(localPath) {
        const url = this._getUrl(localPath, 'checkpoints');
        const response = await __1.ServerConnection.makeRequest(url, {}, this.serverSettings);
        if (response.status !== 200) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        const data = await response.json();
        if (!Array.isArray(data)) {
            throw new Error('Invalid Checkpoint list');
        }
        for (let i = 0; i < data.length; i++) {
            validate.validateCheckpointModel(data[i]);
        }
        return data;
    }
    /**
     * Restore a file to a known checkpoint state.
     *
     * @param localPath - The path of the file.
     *
     * @param checkpointID - The id of the checkpoint to restore.
     *
     * @returns A promise which resolves when the checkpoint is restored.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/contents).
     */
    async restoreCheckpoint(localPath, checkpointID) {
        const url = this._getUrl(localPath, 'checkpoints', checkpointID);
        const init = { method: 'POST' };
        const response = await __1.ServerConnection.makeRequest(url, init, this.serverSettings);
        if (response.status !== 204) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
    }
    /**
     * Delete a checkpoint for a file.
     *
     * @param localPath - The path of the file.
     *
     * @param checkpointID - The id of the checkpoint to delete.
     *
     * @returns A promise which resolves when the checkpoint is deleted.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/contents).
     */
    async deleteCheckpoint(localPath, checkpointID) {
        const url = this._getUrl(localPath, 'checkpoints', checkpointID);
        const init = { method: 'DELETE' };
        const response = await __1.ServerConnection.makeRequest(url, init, this.serverSettings);
        if (response.status !== 204) {
            const err = await __1.ServerConnection.ResponseError.create(response);
            throw err;
        }
    }
    /**
     * Get a REST url for a file given a path.
     */
    _getUrl(...args) {
        const parts = args.map(path => coreutils_1.URLExt.encodeParts(path));
        const baseUrl = this.serverSettings.baseUrl;
        return coreutils_1.URLExt.join(baseUrl, this._apiEndpoint, ...parts);
    }
}
exports.Drive = Drive;
/**
 * A namespace for module private data.
 */
var Private;
(function (Private) {
    /**
     * Normalize a file extension to be of the type `'.foo'`.
     *
     * Adds a leading dot if not present and converts to lower case.
     */
    function normalizeExtension(extension) {
        if (extension.length > 0 && extension.indexOf('.') !== 0) {
            extension = `.${extension}`;
        }
        return extension;
    }
    Private.normalizeExtension = normalizeExtension;
})(Private || (Private = {}));
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 2706:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.validateCheckpointModel = exports.validateContentsModel = void 0;
const validate_1 = __webpack_require__(7441);
/**
 * Validate an `Contents.IModel` object.
 */
function validateContentsModel(model) {
    (0, validate_1.validateProperty)(model, 'name', 'string');
    (0, validate_1.validateProperty)(model, 'path', 'string');
    (0, validate_1.validateProperty)(model, 'type', 'string');
    (0, validate_1.validateProperty)(model, 'created', 'string');
    (0, validate_1.validateProperty)(model, 'last_modified', 'string');
    (0, validate_1.validateProperty)(model, 'mimetype', 'object');
    (0, validate_1.validateProperty)(model, 'content', 'object');
    (0, validate_1.validateProperty)(model, 'format', 'object');
}
exports.validateContentsModel = validateContentsModel;
/**
 * Validate an `Contents.ICheckpointModel` object.
 */
function validateCheckpointModel(model) {
    (0, validate_1.validateProperty)(model, 'id', 'string');
    (0, validate_1.validateProperty)(model, 'last_modified', 'string');
}
exports.validateCheckpointModel = validateCheckpointModel;
//# sourceMappingURL=validate.js.map

/***/ }),

/***/ 9480:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.EventManager = void 0;
const coreutils_1 = __webpack_require__(8925);
const polling_1 = __webpack_require__(6049);
const signaling_1 = __webpack_require__(3992);
const serverconnection_1 = __webpack_require__(2920);
/**
 * The url for the jupyter-server events service.
 */
const SERVICE_EVENTS_URL = 'api/events';
/**
 * The events API service manager.
 */
class EventManager {
    /**
     * Create a new event manager.
     */
    constructor(options = {}) {
        var _a;
        this._socket = null;
        this.serverSettings =
            (_a = options.serverSettings) !== null && _a !== void 0 ? _a : serverconnection_1.ServerConnection.makeSettings();
        // If subscription fails, the poll attempts to reconnect and backs off.
        this._poll = new polling_1.Poll({ factory: () => this._subscribe() });
        this._stream = new signaling_1.Stream(this);
        // Subscribe to the events socket.
        void this._poll.start();
    }
    /**
     * Whether the event manager is disposed.
     */
    get isDisposed() {
        return this._poll.isDisposed;
    }
    /**
     * An event stream that emits and yields each new event.
     */
    get stream() {
        return this._stream;
    }
    /**
     * Dispose the event manager.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        // Clean up poll.
        this._poll.dispose();
        // Clean up socket.
        const socket = this._socket;
        if (socket) {
            this._socket = null;
            socket.onopen = () => undefined;
            socket.onerror = () => undefined;
            socket.onmessage = () => undefined;
            socket.onclose = () => undefined;
            socket.close();
        }
        // Clean up stream.
        signaling_1.Signal.clearData(this);
        this._stream.stop();
    }
    /**
     * Post an event request to be emitted by the event bus.
     */
    async emit(event) {
        const { serverSettings } = this;
        const { baseUrl } = serverSettings;
        const { makeRequest, ResponseError } = serverconnection_1.ServerConnection;
        const url = coreutils_1.URLExt.join(baseUrl, SERVICE_EVENTS_URL);
        const init = { body: JSON.stringify(event), method: 'POST' };
        const response = await makeRequest(url, init, serverSettings);
        if (response.status !== 204) {
            throw new ResponseError(response);
        }
    }
    /**
     * Subscribe to event bus emissions.
     */
    _subscribe() {
        return new Promise((_, reject) => {
            if (this.isDisposed) {
                return;
            }
            const { appendToken, token, WebSocket, wsUrl } = this.serverSettings;
            let url = coreutils_1.URLExt.join(wsUrl, SERVICE_EVENTS_URL, 'subscribe');
            if (appendToken && token !== '') {
                url += `?token=${encodeURIComponent(token)}`;
            }
            const socket = (this._socket = new WebSocket(url));
            const stream = this._stream;
            socket.onclose = () => reject(new Error('EventManager socket closed'));
            socket.onmessage = msg => msg.data && stream.emit(JSON.parse(msg.data));
        });
    }
}
exports.EventManager = EventManager;
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 7883:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/**
 * @packageDocumentation
 * @module services
 */
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__exportStar(__webpack_require__(8683), exports);
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 7489:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
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    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
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    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.CommHandler = void 0;
const disposable_1 = __webpack_require__(7556);
const KernelMessage = __importStar(__webpack_require__(9909));
/**
 * Comm channel handler.
 */
class CommHandler extends disposable_1.DisposableDelegate {
    /**
     * Construct a new comm channel.
     */
    constructor(target, id, kernel, disposeCb) {
        super(disposeCb);
        this._target = '';
        this._id = '';
        this._id = id;
        this._target = target;
        this._kernel = kernel;
    }
    /**
     * The unique id for the comm channel.
     */
    get commId() {
        return this._id;
    }
    /**
     * The target name for the comm channel.
     */
    get targetName() {
        return this._target;
    }
    /**
     * Get the callback for a comm close event.
     *
     * #### Notes
     * This is called when the comm is closed from either the server or client.
     *
     * **See also:** [[ICommClose]], [[close]]
     */
    get onClose() {
        return this._onClose;
    }
    /**
     * Set the callback for a comm close event.
     *
     * #### Notes
     * This is called when the comm is closed from either the server or client. If
     * the function returns a promise, and the kernel was closed from the server,
     * kernel message processing will pause until the returned promise is
     * fulfilled.
     *
     * **See also:** [[close]]
     */
    set onClose(cb) {
        this._onClose = cb;
    }
    /**
     * Get the callback for a comm message received event.
     */
    get onMsg() {
        return this._onMsg;
    }
    /**
     * Set the callback for a comm message received event.
     *
     * #### Notes
     * This is called when a comm message is received. If the function returns a
     * promise, kernel message processing will pause until it is fulfilled.
     */
    set onMsg(cb) {
        this._onMsg = cb;
    }
    /**
     * Open a comm with optional data and metadata.
     *
     * #### Notes
     * This sends a `comm_open` message to the server.
     *
     * **See also:** [[ICommOpen]]
     */
    open(data, metadata, buffers = []) {
        if (this.isDisposed || this._kernel.isDisposed) {
            throw new Error('Cannot open');
        }
        const msg = KernelMessage.createMessage({
            msgType: 'comm_open',
            channel: 'shell',
            username: this._kernel.username,
            session: this._kernel.clientId,
            content: {
                comm_id: this._id,
                target_name: this._target,
                data: data !== null && data !== void 0 ? data : {}
            },
            metadata,
            buffers
        });
        return this._kernel.sendShellMessage(msg, false, true);
    }
    /**
     * Send a `comm_msg` message to the kernel.
     *
     * #### Notes
     * This is a no-op if the comm has been closed.
     *
     * **See also:** [[ICommMsg]]
     */
    send(data, metadata, buffers = [], disposeOnDone = true) {
        if (this.isDisposed || this._kernel.isDisposed) {
            throw new Error('Cannot send');
        }
        const msg = KernelMessage.createMessage({
            msgType: 'comm_msg',
            channel: 'shell',
            username: this._kernel.username,
            session: this._kernel.clientId,
            content: {
                comm_id: this._id,
                data: data
            },
            metadata,
            buffers
        });
        return this._kernel.sendShellMessage(msg, false, disposeOnDone);
    }
    /**
     * Close the comm.
     *
     * #### Notes
     * This will send a `comm_close` message to the kernel, and call the
     * `onClose` callback if set.
     *
     * This is a no-op if the comm is already closed.
     *
     * **See also:** [[ICommClose]], [[onClose]]
     */
    close(data, metadata, buffers = []) {
        if (this.isDisposed || this._kernel.isDisposed) {
            throw new Error('Cannot close');
        }
        const msg = KernelMessage.createMessage({
            msgType: 'comm_close',
            channel: 'shell',
            username: this._kernel.username,
            session: this._kernel.clientId,
            content: {
                comm_id: this._id,
                data: data !== null && data !== void 0 ? data : {}
            },
            metadata,
            buffers
        });
        const future = this._kernel.sendShellMessage(msg, false, true);
        const onClose = this._onClose;
        if (onClose) {
            const ioMsg = KernelMessage.createMessage({
                msgType: 'comm_close',
                channel: 'iopub',
                username: this._kernel.username,
                session: this._kernel.clientId,
                content: {
                    comm_id: this._id,
                    data: data !== null && data !== void 0 ? data : {}
                },
                metadata,
                buffers
            });
            // In the future, we may want to communicate back to the user the possible
            // promise returned from onClose.
            void onClose(ioMsg);
        }
        this.dispose();
        return future;
    }
}
exports.CommHandler = CommHandler;
//# sourceMappingURL=comm.js.map

/***/ }),

/***/ 2456:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
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      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
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    o[k2] = m[k];
}));
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}) : function(o, v) {
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});
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    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.KernelConnection = void 0;
const coreutils_1 = __webpack_require__(8925);
const coreutils_2 = __webpack_require__(5764);
const signaling_1 = __webpack_require__(3992);
const __1 = __webpack_require__(7883);
const comm_1 = __webpack_require__(7489);
const KernelMessage = __importStar(__webpack_require__(9909));
const future_1 = __webpack_require__(134);
const validate = __importStar(__webpack_require__(5855));
const kernelspec_1 = __webpack_require__(2946);
const restapi = __importStar(__webpack_require__(8235));
const KERNEL_INFO_TIMEOUT = 3000;
const RESTARTING_KERNEL_SESSION = '_RESTARTING_';
const STARTING_KERNEL_SESSION = '';
/**
 * Implementation of the Kernel object.
 *
 * #### Notes
 * Messages from the server are handled in the order they were received and
 * asynchronously. Any message handler can return a promise, and message
 * handling will pause until the promise is fulfilled.
 */
class KernelConnection {
    /**
     * Construct a kernel object.
     */
    constructor(options) {
        var _a, _b, _c, _d;
        /**
         * Create the kernel websocket connection and add socket status handlers.
         */
        this._createSocket = (useProtocols = true) => {
            this._errorIfDisposed();
            // Make sure the socket is clear
            this._clearSocket();
            // Update the connection status to reflect opening a new connection.
            this._updateConnectionStatus('connecting');
            const settings = this.serverSettings;
            const partialUrl = coreutils_1.URLExt.join(settings.wsUrl, restapi.KERNEL_SERVICE_URL, encodeURIComponent(this._id));
            // Strip any authentication from the display string.
            const display = partialUrl.replace(/^((?:\w+:)?\/\/)(?:[^@\/]+@)/, '$1');
            console.debug(`Starting WebSocket: ${display}`);
            let url = coreutils_1.URLExt.join(partialUrl, 'channels?session_id=' + encodeURIComponent(this._clientId));
            // If token authentication is in use.
            const token = settings.token;
            if (settings.appendToken && token !== '') {
                url = url + `&token=${encodeURIComponent(token)}`;
            }
            // Try opening the websocket with our list of subprotocols.
            // If the server doesn't handle subprotocols,
            // the accepted protocol will be ''.
            // But we cannot send '' as a subprotocol, so if connection fails,
            // reconnect without subprotocols.
            const supportedProtocols = useProtocols ? this._supportedProtocols : [];
            this._ws = new settings.WebSocket(url, supportedProtocols);
            // Ensure incoming binary messages are not Blobs
            this._ws.binaryType = 'arraybuffer';
            let alreadyCalledOnclose = false;
            const getKernelModel = async (evt) => {
                var _a, _b;
                if (this._isDisposed) {
                    return;
                }
                this._reason = '';
                this._model = undefined;
                try {
                    const model = await restapi.getKernelModel(this._id, settings);
                    this._model = model;
                    if ((model === null || model === void 0 ? void 0 : model.execution_state) === 'dead') {
                        this._updateStatus('dead');
                    }
                    else {
                        this._onWSClose(evt);
                    }
                }
                catch (err) {
                    // Try again, if there is a network failure
                    // Handle network errors, as well as cases where we are on a
                    // JupyterHub and the server is not running. JupyterHub returns a
                    // 503 (<2.0) or 424 (>2.0) in that case.
                    if (err instanceof __1.ServerConnection.NetworkError ||
                        ((_a = err.response) === null || _a === void 0 ? void 0 : _a.status) === 503 ||
                        ((_b = err.response) === null || _b === void 0 ? void 0 : _b.status) === 424) {
                        const timeout = Private.getRandomIntInclusive(10, 30) * 1e3;
                        setTimeout(getKernelModel, timeout, evt);
                    }
                    else {
                        this._reason = 'Kernel died unexpectedly';
                        this._updateStatus('dead');
                    }
                }
                return;
            };
            const earlyClose = async (evt) => {
                // If the websocket was closed early, that could mean
                // that the kernel is actually dead. Try getting
                // information about the kernel from the API call,
                // if that fails, then assume the kernel is dead,
                // otherwise just follow the typical websocket closed
                // protocol.
                if (alreadyCalledOnclose) {
                    return;
                }
                alreadyCalledOnclose = true;
                await getKernelModel(evt);
                return;
            };
            this._ws.onmessage = this._onWSMessage;
            this._ws.onopen = this._onWSOpen;
            this._ws.onclose = earlyClose;
            this._ws.onerror = earlyClose;
        };
        // Make websocket callbacks arrow functions so they bind `this`.
        /**
         * Handle a websocket open event.
         */
        this._onWSOpen = (evt) => {
            if (this._ws.protocol !== '' &&
                !this._supportedProtocols.includes(this._ws.protocol)) {
                console.log('Server selected unknown kernel wire protocol:', this._ws.protocol);
                this._updateStatus('dead');
                throw new Error(`Unknown kernel wire protocol:  ${this._ws.protocol}`);
            }
            // Remember the kernel wire protocol selected by the server.
            this._selectedProtocol = this._ws.protocol;
            this._ws.onclose = this._onWSClose;
            this._ws.onerror = this._onWSClose;
            this._updateConnectionStatus('connected');
        };
        /**
         * Handle a websocket message, validating and routing appropriately.
         */
        this._onWSMessage = (evt) => {
            // Notify immediately if there is an error with the message.
            let msg;
            try {
                msg = this.serverSettings.serializer.deserialize(evt.data, this._ws.protocol);
                validate.validateMessage(msg);
            }
            catch (error) {
                error.message = `Kernel message validation error: ${error.message}`;
                // We throw the error so that it bubbles up to the top, and displays the right stack.
                throw error;
            }
            // Update the current kernel session id
            this._kernelSession = msg.header.session;
            // Handle the message asynchronously, in the order received.
            this._msgChain = this._msgChain
                .then(() => {
                // Return so that any promises from handling a message are fulfilled
                // before proceeding to the next message.
                return this._handleMessage(msg);
            })
                .catch(error => {
                // Log any errors in handling the message, thus resetting the _msgChain
                // promise so we can process more messages.
                // Ignore the "Canceled" errors that are thrown during kernel dispose.
                if (error.message.startsWith('Canceled future for ')) {
                    console.error(error);
                }
            });
            // Emit the message receive signal
            this._anyMessage.emit({ msg, direction: 'recv' });
        };
        /**
         * Handle a websocket close event.
         */
        this._onWSClose = (evt) => {
            if (!this.isDisposed) {
                this._reconnect();
            }
        };
        this._id = '';
        this._name = '';
        this._status = 'unknown';
        this._connectionStatus = 'connecting';
        this._kernelSession = '';
        this._isDisposed = false;
        /**
         * Websocket to communicate with kernel.
         */
        this._ws = null;
        this._username = '';
        this._reconnectLimit = 7;
        this._reconnectAttempt = 0;
        this._reconnectTimeout = null;
        this._supportedProtocols = Object.values(KernelMessage.supportedKernelWebSocketProtocols);
        this._selectedProtocol = '';
        this._futures = new Map();
        this._comms = new Map();
        this._targetRegistry = Object.create(null);
        this._info = new coreutils_2.PromiseDelegate();
        this._pendingMessages = [];
        this._statusChanged = new signaling_1.Signal(this);
        this._connectionStatusChanged = new signaling_1.Signal(this);
        this._disposed = new signaling_1.Signal(this);
        this._iopubMessage = new signaling_1.Signal(this);
        this._anyMessage = new signaling_1.Signal(this);
        this._pendingInput = new signaling_1.Signal(this);
        this._unhandledMessage = new signaling_1.Signal(this);
        this._displayIdToParentIds = new Map();
        this._msgIdToDisplayIds = new Map();
        this._msgChain = Promise.resolve();
        this._hasPendingInput = false;
        this._reason = '';
        this._noOp = () => {
            /* no-op */
        };
        this._name = options.model.name;
        this._id = options.model.id;
        this.serverSettings =
            (_a = options.serverSettings) !== null && _a !== void 0 ? _a : __1.ServerConnection.makeSettings();
        this._clientId = (_b = options.clientId) !== null && _b !== void 0 ? _b : coreutils_2.UUID.uuid4();
        this._username = (_c = options.username) !== null && _c !== void 0 ? _c : '';
        this.handleComms = (_d = options.handleComms) !== null && _d !== void 0 ? _d : true;
        this._createSocket();
    }
    get disposed() {
        return this._disposed;
    }
    /**
     * A signal emitted when the kernel status changes.
     */
    get statusChanged() {
        return this._statusChanged;
    }
    /**
     * A signal emitted when the kernel status changes.
     */
    get connectionStatusChanged() {
        return this._connectionStatusChanged;
    }
    /**
     * A signal emitted for iopub kernel messages.
     *
     * #### Notes
     * This signal is emitted after the iopub message is handled asynchronously.
     */
    get iopubMessage() {
        return this._iopubMessage;
    }
    /**
     * A signal emitted for unhandled kernel message.
     *
     * #### Notes
     * This signal is emitted for a message that was not handled. It is emitted
     * during the asynchronous message handling code.
     */
    get unhandledMessage() {
        return this._unhandledMessage;
    }
    /**
     * The kernel model
     */
    get model() {
        return (this._model || {
            id: this.id,
            name: this.name,
            reason: this._reason
        });
    }
    /**
     * A signal emitted for any kernel message.
     *
     * #### Notes
     * This signal is emitted when a message is received, before it is handled
     * asynchronously.
     *
     * This message is emitted when a message is queued for sending (either in
     * the websocket buffer, or our own pending message buffer). The message may
     * actually be sent across the wire at a later time.
     *
     * The message emitted in this signal should not be modified in any way.
     */
    get anyMessage() {
        return this._anyMessage;
    }
    /**
     * A signal emitted when a kernel has pending inputs from the user.
     */
    get pendingInput() {
        return this._pendingInput;
    }
    /**
     * The id of the server-side kernel.
     */
    get id() {
        return this._id;
    }
    /**
     * The name of the server-side kernel.
     */
    get name() {
        return this._name;
    }
    /**
     * The client username.
     */
    get username() {
        return this._username;
    }
    /**
     * The client unique id.
     */
    get clientId() {
        return this._clientId;
    }
    /**
     * The current status of the kernel.
     */
    get status() {
        return this._status;
    }
    /**
     * The current connection status of the kernel connection.
     */
    get connectionStatus() {
        return this._connectionStatus;
    }
    /**
     * Test whether the kernel has been disposed.
     */
    get isDisposed() {
        return this._isDisposed;
    }
    /**
     * The cached kernel info.
     *
     * @returns A promise that resolves to the kernel info.
     */
    get info() {
        return this._info.promise;
    }
    /**
     * The kernel spec.
     *
     * @returns A promise that resolves to the kernel spec.
     */
    get spec() {
        if (this._specPromise) {
            return this._specPromise;
        }
        this._specPromise = kernelspec_1.KernelSpecAPI.getSpecs(this.serverSettings).then(specs => {
            return specs.kernelspecs[this._name];
        });
        return this._specPromise;
    }
    /**
     * Clone the current kernel with a new clientId.
     */
    clone(options = {}) {
        return new KernelConnection({
            model: this.model,
            username: this.username,
            serverSettings: this.serverSettings,
            // handleComms defaults to false since that is safer
            handleComms: false,
            ...options
        });
    }
    /**
     * Dispose of the resources held by the kernel.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._isDisposed = true;
        this._disposed.emit();
        this._updateConnectionStatus('disconnected');
        this._clearKernelState();
        this._pendingMessages = [];
        this._clearSocket();
        // Clear Lumino signals
        signaling_1.Signal.clearData(this);
    }
    /**
     * Send a shell message to the kernel.
     *
     * #### Notes
     * Send a message to the kernel's shell channel, yielding a future object
     * for accepting replies.
     *
     * If `expectReply` is given and `true`, the future is disposed when both a
     * shell reply and an idle status message are received. If `expectReply`
     * is not given or is `false`, the future is resolved when an idle status
     * message is received.
     * If `disposeOnDone` is not given or is `true`, the Future is disposed at this point.
     * If `disposeOnDone` is given and `false`, it is up to the caller to dispose of the Future.
     *
     * All replies are validated as valid kernel messages.
     *
     * If the kernel status is `dead`, this will throw an error.
     */
    sendShellMessage(msg, expectReply = false, disposeOnDone = true) {
        return this._sendKernelShellControl(future_1.KernelShellFutureHandler, msg, expectReply, disposeOnDone);
    }
    /**
     * Send a control message to the kernel.
     *
     * #### Notes
     * Send a message to the kernel's control channel, yielding a future object
     * for accepting replies.
     *
     * If `expectReply` is given and `true`, the future is disposed when both a
     * control reply and an idle status message are received. If `expectReply`
     * is not given or is `false`, the future is resolved when an idle status
     * message is received.
     * If `disposeOnDone` is not given or is `true`, the Future is disposed at this point.
     * If `disposeOnDone` is given and `false`, it is up to the caller to dispose of the Future.
     *
     * All replies are validated as valid kernel messages.
     *
     * If the kernel status is `dead`, this will throw an error.
     */
    sendControlMessage(msg, expectReply = false, disposeOnDone = true) {
        return this._sendKernelShellControl(future_1.KernelControlFutureHandler, msg, expectReply, disposeOnDone);
    }
    _sendKernelShellControl(ctor, msg, expectReply = false, disposeOnDone = true) {
        this._sendMessage(msg);
        this._anyMessage.emit({ msg, direction: 'send' });
        const future = new ctor(() => {
            const msgId = msg.header.msg_id;
            this._futures.delete(msgId);
            // Remove stored display id information.
            const displayIds = this._msgIdToDisplayIds.get(msgId);
            if (!displayIds) {
                return;
            }
            displayIds.forEach(displayId => {
                const msgIds = this._displayIdToParentIds.get(displayId);
                if (msgIds) {
                    const idx = msgIds.indexOf(msgId);
                    if (idx === -1) {
                        return;
                    }
                    if (msgIds.length === 1) {
                        this._displayIdToParentIds.delete(displayId);
                    }
                    else {
                        msgIds.splice(idx, 1);
                        this._displayIdToParentIds.set(displayId, msgIds);
                    }
                }
            });
            this._msgIdToDisplayIds.delete(msgId);
        }, msg, expectReply, disposeOnDone, this);
        this._futures.set(msg.header.msg_id, future);
        return future;
    }
    /**
     * Send a message on the websocket.
     *
     * If queue is true, queue the message for later sending if we cannot send
     * now. Otherwise throw an error.
     *
     * #### Notes
     * As an exception to the queueing, if we are sending a kernel_info_request
     * message while we think the kernel is restarting, we send the message
     * immediately without queueing. This is so that we can trigger a message
     * back, which will then clear the kernel restarting state.
     */
    _sendMessage(msg, queue = true) {
        if (this.status === 'dead') {
            throw new Error('Kernel is dead');
        }
        // If we have a kernel_info_request and we are starting or restarting, send the
        // kernel_info_request immediately if we can, and if not throw an error so
        // we can retry later. On restarting we do this because we must get at least one message
        // from the kernel to reset the kernel session (thus clearing the restart
        // status sentinel).
        if ((this._kernelSession === STARTING_KERNEL_SESSION ||
            this._kernelSession === RESTARTING_KERNEL_SESSION) &&
            KernelMessage.isInfoRequestMsg(msg)) {
            if (this.connectionStatus === 'connected') {
                this._ws.send(this.serverSettings.serializer.serialize(msg, this._ws.protocol));
                return;
            }
            else {
                throw new Error('Could not send message: status is not connected');
            }
        }
        // If there are pending messages, add to the queue so we keep messages in order
        if (queue && this._pendingMessages.length > 0) {
            this._pendingMessages.push(msg);
            return;
        }
        // Send if the ws allows it, otherwise queue the message.
        if (this.connectionStatus === 'connected' &&
            this._kernelSession !== RESTARTING_KERNEL_SESSION) {
            this._ws.send(this.serverSettings.serializer.serialize(msg, this._ws.protocol));
        }
        else if (queue) {
            this._pendingMessages.push(msg);
        }
        else {
            throw new Error('Could not send message');
        }
    }
    /**
     * Interrupt a kernel.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/kernels).
     *
     * The promise is fulfilled on a valid response and rejected otherwise.
     *
     * It is assumed that the API call does not mutate the kernel id or name.
     *
     * The promise will be rejected if the kernel status is `Dead` or if the
     * request fails or the response is invalid.
     */
    async interrupt() {
        this.hasPendingInput = false;
        if (this.status === 'dead') {
            throw new Error('Kernel is dead');
        }
        return restapi.interruptKernel(this.id, this.serverSettings);
    }
    /**
     * Request a kernel restart.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/kernels)
     * and validates the response model.
     *
     * Any existing Future or Comm objects are cleared once the kernel has
     * actually be restarted.
     *
     * The promise is fulfilled on a valid server response (after the kernel restarts)
     * and rejected otherwise.
     *
     * It is assumed that the API call does not mutate the kernel id or name.
     *
     * The promise will be rejected if the request fails or the response is
     * invalid.
     */
    async restart() {
        if (this.status === 'dead') {
            throw new Error('Kernel is dead');
        }
        this._updateStatus('restarting');
        this._clearKernelState();
        this._kernelSession = RESTARTING_KERNEL_SESSION;
        await restapi.restartKernel(this.id, this.serverSettings);
        // Reconnect to the kernel to address cases where kernel ports
        // have changed during the restart.
        await this.reconnect();
        this.hasPendingInput = false;
    }
    /**
     * Reconnect to a kernel.
     *
     * #### Notes
     * This may try multiple times to reconnect to a kernel, and will sever any
     * existing connection.
     */
    reconnect() {
        this._errorIfDisposed();
        const result = new coreutils_2.PromiseDelegate();
        // Set up a listener for the connection status changing, which accepts or
        // rejects after the retries are done.
        const fulfill = (sender, status) => {
            if (status === 'connected') {
                result.resolve();
                this.connectionStatusChanged.disconnect(fulfill, this);
            }
            else if (status === 'disconnected') {
                result.reject(new Error('Kernel connection disconnected'));
                this.connectionStatusChanged.disconnect(fulfill, this);
            }
        };
        this.connectionStatusChanged.connect(fulfill, this);
        // Reset the reconnect limit so we start the connection attempts fresh
        this._reconnectAttempt = 0;
        // Start the reconnection process, which will also clear any existing
        // connection.
        this._reconnect();
        // Return the promise that should resolve on connection or reject if the
        // retries don't work.
        return result.promise;
    }
    /**
     * Shutdown a kernel.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/kernels).
     *
     * The promise is fulfilled on a valid response and rejected otherwise.
     *
     * On a valid response, disposes this kernel connection.
     *
     * If the kernel is already `dead`, disposes this kernel connection without
     * a server request.
     */
    async shutdown() {
        if (this.status !== 'dead') {
            await restapi.shutdownKernel(this.id, this.serverSettings);
        }
        this.handleShutdown();
    }
    /**
     * Handles a kernel shutdown.
     *
     * #### Notes
     * This method should be called if we know from outside information that a
     * kernel is dead (for example, we cannot find the kernel model on the
     * server).
     */
    handleShutdown() {
        this._updateStatus('dead');
        this.dispose();
    }
    /**
     * Send a `kernel_info_request` message.
     *
     * #### Notes
     * See [Messaging in Jupyter](https://jupyter-client.readthedocs.io/en/latest/messaging.html#kernel-info).
     *
     * Fulfills with the `kernel_info_response` content when the shell reply is
     * received and validated.
     */
    async requestKernelInfo() {
        const msg = KernelMessage.createMessage({
            msgType: 'kernel_info_request',
            channel: 'shell',
            username: this._username,
            session: this._clientId,
            content: {}
        });
        let reply;
        try {
            reply = (await Private.handleShellMessage(this, msg));
        }
        catch (e) {
            // If we rejected because the future was disposed, ignore and return.
            if (this.isDisposed) {
                return;
            }
            else {
                throw e;
            }
        }
        this._errorIfDisposed();
        if (!reply) {
            return;
        }
        // Kernels sometimes do not include a status field on kernel_info_reply
        // messages, so set a default for now.
        // See https://github.com/jupyterlab/jupyterlab/issues/6760
        if (reply.content.status === undefined) {
            reply.content.status = 'ok';
        }
        if (reply.content.status !== 'ok') {
            this._info.reject('Kernel info reply errored');
            return reply;
        }
        this._info.resolve(reply.content);
        this._kernelSession = reply.header.session;
        return reply;
    }
    /**
     * Send a `complete_request` message.
     *
     * #### Notes
     * See [Messaging in Jupyter](https://jupyter-client.readthedocs.io/en/latest/messaging.html#completion).
     *
     * Fulfills with the `complete_reply` content when the shell reply is
     * received and validated.
     */
    requestComplete(content) {
        const msg = KernelMessage.createMessage({
            msgType: 'complete_request',
            channel: 'shell',
            username: this._username,
            session: this._clientId,
            content
        });
        return Private.handleShellMessage(this, msg);
    }
    /**
     * Send an `inspect_request` message.
     *
     * #### Notes
     * See [Messaging in Jupyter](https://jupyter-client.readthedocs.io/en/latest/messaging.html#introspection).
     *
     * Fulfills with the `inspect_reply` content when the shell reply is
     * received and validated.
     */
    requestInspect(content) {
        const msg = KernelMessage.createMessage({
            msgType: 'inspect_request',
            channel: 'shell',
            username: this._username,
            session: this._clientId,
            content: content
        });
        return Private.handleShellMessage(this, msg);
    }
    /**
     * Send a `history_request` message.
     *
     * #### Notes
     * See [Messaging in Jupyter](https://jupyter-client.readthedocs.io/en/latest/messaging.html#history).
     *
     * Fulfills with the `history_reply` content when the shell reply is
     * received and validated.
     */
    requestHistory(content) {
        const msg = KernelMessage.createMessage({
            msgType: 'history_request',
            channel: 'shell',
            username: this._username,
            session: this._clientId,
            content
        });
        return Private.handleShellMessage(this, msg);
    }
    /**
     * Send an `execute_request` message.
     *
     * #### Notes
     * See [Messaging in Jupyter](https://jupyter-client.readthedocs.io/en/latest/messaging.html#execute).
     *
     * Future `onReply` is called with the `execute_reply` content when the
     * shell reply is received and validated. The future will resolve when
     * this message is received and the `idle` iopub status is received.
     * The future will also be disposed at this point unless `disposeOnDone`
     * is specified and `false`, in which case it is up to the caller to dispose
     * of the future.
     *
     * **See also:** [[IExecuteReply]]
     */
    requestExecute(content, disposeOnDone = true, metadata) {
        const defaults = {
            silent: false,
            store_history: true,
            user_expressions: {},
            allow_stdin: true,
            stop_on_error: false
        };
        const msg = KernelMessage.createMessage({
            msgType: 'execute_request',
            channel: 'shell',
            username: this._username,
            session: this._clientId,
            content: { ...defaults, ...content },
            metadata
        });
        return this.sendShellMessage(msg, true, disposeOnDone);
    }
    /**
     * Send an experimental `debug_request` message.
     *
     * @hidden
     *
     * #### Notes
     * Debug messages are experimental messages that are not in the official
     * kernel message specification. As such, this function is *NOT* considered
     * part of the public API, and may change without notice.
     */
    requestDebug(content, disposeOnDone = true) {
        const msg = KernelMessage.createMessage({
            msgType: 'debug_request',
            channel: 'control',
            username: this._username,
            session: this._clientId,
            content
        });
        return this.sendControlMessage(msg, true, disposeOnDone);
    }
    /**
     * Send an `is_complete_request` message.
     *
     * #### Notes
     * See [Messaging in Jupyter](https://jupyter-client.readthedocs.io/en/latest/messaging.html#code-completeness).
     *
     * Fulfills with the `is_complete_response` content when the shell reply is
     * received and validated.
     */
    requestIsComplete(content) {
        const msg = KernelMessage.createMessage({
            msgType: 'is_complete_request',
            channel: 'shell',
            username: this._username,
            session: this._clientId,
            content
        });
        return Private.handleShellMessage(this, msg);
    }
    /**
     * Send a `comm_info_request` message.
     *
     * #### Notes
     * Fulfills with the `comm_info_reply` content when the shell reply is
     * received and validated.
     */
    requestCommInfo(content) {
        const msg = KernelMessage.createMessage({
            msgType: 'comm_info_request',
            channel: 'shell',
            username: this._username,
            session: this._clientId,
            content
        });
        return Private.handleShellMessage(this, msg);
    }
    /**
     * Send an `input_reply` message.
     *
     * #### Notes
     * See [Messaging in Jupyter](https://jupyter-client.readthedocs.io/en/latest/messaging.html#messages-on-the-stdin-router-dealer-sockets).
     */
    sendInputReply(content, parent_header) {
        const msg = KernelMessage.createMessage({
            msgType: 'input_reply',
            channel: 'stdin',
            username: this._username,
            session: this._clientId,
            content
        });
        msg.parent_header = parent_header;
        this._sendMessage(msg);
        this._anyMessage.emit({ msg, direction: 'send' });
        this.hasPendingInput = false;
    }
    /**
     * Create a new comm.
     *
     * #### Notes
     * If a client-side comm already exists with the given commId, an error is thrown.
     * If the kernel does not handle comms, an error is thrown.
     */
    createComm(targetName, commId = coreutils_2.UUID.uuid4()) {
        if (!this.handleComms) {
            throw new Error('Comms are disabled on this kernel connection');
        }
        if (this._comms.has(commId)) {
            throw new Error('Comm is already created');
        }
        const comm = new comm_1.CommHandler(targetName, commId, this, () => {
            this._unregisterComm(commId);
        });
        this._comms.set(commId, comm);
        return comm;
    }
    /**
     * Check if a comm exists.
     */
    hasComm(commId) {
        return this._comms.has(commId);
    }
    /**
     * Register a comm target handler.
     *
     * @param targetName - The name of the comm target.
     *
     * @param callback - The callback invoked for a comm open message.
     *
     * @returns A disposable used to unregister the comm target.
     *
     * #### Notes
     * Only one comm target can be registered to a target name at a time, an
     * existing callback for the same target name will be overridden.  A registered
     * comm target handler will take precedence over a comm which specifies a
     * `target_module`.
     *
     * If the callback returns a promise, kernel message processing will pause
     * until the returned promise is fulfilled.
     */
    registerCommTarget(targetName, callback) {
        if (!this.handleComms) {
            return;
        }
        this._targetRegistry[targetName] = callback;
    }
    /**
     * Remove a comm target handler.
     *
     * @param targetName - The name of the comm target to remove.
     *
     * @param callback - The callback to remove.
     *
     * #### Notes
     * The comm target is only removed if the callback argument matches.
     */
    removeCommTarget(targetName, callback) {
        if (!this.handleComms) {
            return;
        }
        if (!this.isDisposed && this._targetRegistry[targetName] === callback) {
            delete this._targetRegistry[targetName];
        }
    }
    /**
     * Register an IOPub message hook.
     *
     * @param msg_id - The parent_header message id the hook will intercept.
     *
     * @param hook - The callback invoked for the message.
     *
     * #### Notes
     * The IOPub hook system allows you to preempt the handlers for IOPub
     * messages that are responses to a given message id.
     *
     * The most recently registered hook is run first. A hook can return a
     * boolean or a promise to a boolean, in which case all kernel message
     * processing pauses until the promise is fulfilled. If a hook return value
     * resolves to false, any later hooks will not run and the function will
     * return a promise resolving to false. If a hook throws an error, the error
     * is logged to the console and the next hook is run. If a hook is
     * registered during the hook processing, it will not run until the next
     * message. If a hook is removed during the hook processing, it will be
     * deactivated immediately.
     *
     * See also [[IFuture.registerMessageHook]].
     */
    registerMessageHook(msgId, hook) {
        var _a;
        const future = (_a = this._futures) === null || _a === void 0 ? void 0 : _a.get(msgId);
        if (future) {
            future.registerMessageHook(hook);
        }
    }
    /**
     * Remove an IOPub message hook.
     *
     * @param msg_id - The parent_header message id the hook intercepted.
     *
     * @param hook - The callback invoked for the message.
     *
     */
    removeMessageHook(msgId, hook) {
        var _a;
        const future = (_a = this._futures) === null || _a === void 0 ? void 0 : _a.get(msgId);
        if (future) {
            future.removeMessageHook(hook);
        }
    }
    /**
     * Remove the input guard, if any.
     */
    removeInputGuard() {
        this.hasPendingInput = false;
    }
    /**
     * Handle a message with a display id.
     *
     * @returns Whether the message was handled.
     */
    async _handleDisplayId(displayId, msg) {
        var _a, _b;
        const msgId = msg.parent_header.msg_id;
        let parentIds = this._displayIdToParentIds.get(displayId);
        if (parentIds) {
            // We've seen it before, update existing outputs with same display_id
            // by handling display_data as update_display_data.
            const updateMsg = {
                header: coreutils_2.JSONExt.deepCopy(msg.header),
                parent_header: coreutils_2.JSONExt.deepCopy(msg.parent_header),
                metadata: coreutils_2.JSONExt.deepCopy(msg.metadata),
                content: coreutils_2.JSONExt.deepCopy(msg.content),
                channel: msg.channel,
                buffers: msg.buffers ? msg.buffers.slice() : []
            };
            updateMsg.header.msg_type = 'update_display_data';
            await Promise.all(parentIds.map(async (parentId) => {
                const future = this._futures && this._futures.get(parentId);
                if (future) {
                    await future.handleMsg(updateMsg);
                }
            }));
        }
        // We're done here if it's update_display.
        if (msg.header.msg_type === 'update_display_data') {
            // It's an update, don't proceed to the normal display.
            return true;
        }
        // Regular display_data with id, record it for future updating
        // in _displayIdToParentIds for future lookup.
        parentIds = (_a = this._displayIdToParentIds.get(displayId)) !== null && _a !== void 0 ? _a : [];
        if (parentIds.indexOf(msgId) === -1) {
            parentIds.push(msgId);
        }
        this._displayIdToParentIds.set(displayId, parentIds);
        // Add to our map of display ids for this message.
        const displayIds = (_b = this._msgIdToDisplayIds.get(msgId)) !== null && _b !== void 0 ? _b : [];
        if (displayIds.indexOf(msgId) === -1) {
            displayIds.push(msgId);
        }
        this._msgIdToDisplayIds.set(msgId, displayIds);
        // Let the message propagate to the intended recipient.
        return false;
    }
    /**
     * Forcefully clear the socket state.
     *
     * #### Notes
     * This will clear all socket state without calling any handlers and will
     * not update the connection status. If you call this method, you are
     * responsible for updating the connection status as needed and recreating
     * the socket if you plan to reconnect.
     */
    _clearSocket() {
        if (this._ws !== null) {
            // Clear the websocket event handlers and the socket itself.
            this._ws.onopen = this._noOp;
            this._ws.onclose = this._noOp;
            this._ws.onerror = this._noOp;
            this._ws.onmessage = this._noOp;
            this._ws.close();
            this._ws = null;
        }
    }
    /**
     * Handle status iopub messages from the kernel.
     */
    _updateStatus(status) {
        if (this._status === status || this._status === 'dead') {
            return;
        }
        this._status = status;
        Private.logKernelStatus(this);
        this._statusChanged.emit(status);
        if (status === 'dead') {
            this.dispose();
        }
    }
    /**
     * Send pending messages to the kernel.
     */
    _sendPending() {
        // We check to make sure we are still connected each time. For
        // example, if a websocket buffer overflows, it may close, so we should
        // stop sending messages.
        while (this.connectionStatus === 'connected' &&
            this._kernelSession !== RESTARTING_KERNEL_SESSION &&
            this._pendingMessages.length > 0) {
            this._sendMessage(this._pendingMessages[0], false);
            // We shift the message off the queue after the message is sent so that
            // if there is an exception, the message is still pending.
            this._pendingMessages.shift();
        }
    }
    /**
     * Clear the internal state.
     */
    _clearKernelState() {
        this._kernelSession = '';
        this._pendingMessages = [];
        this._futures.forEach(future => {
            future.dispose();
        });
        this._comms.forEach(comm => {
            comm.dispose();
        });
        this._msgChain = Promise.resolve();
        this._futures = new Map();
        this._comms = new Map();
        this._displayIdToParentIds.clear();
        this._msgIdToDisplayIds.clear();
    }
    /**
     * Check to make sure it is okay to proceed to handle a message.
     *
     * #### Notes
     * Because we handle messages asynchronously, before a message is handled the
     * kernel might be disposed or restarted (and have a different session id).
     * This function throws an error in each of these cases. This is meant to be
     * called at the start of an asynchronous message handler to cancel message
     * processing if the message no longer is valid.
     */
    _assertCurrentMessage(msg) {
        this._errorIfDisposed();
        if (msg.header.session !== this._kernelSession) {
            throw new Error(`Canceling handling of old message: ${msg.header.msg_type}`);
        }
    }
    /**
     * Handle a `comm_open` kernel message.
     */
    async _handleCommOpen(msg) {
        this._assertCurrentMessage(msg);
        const content = msg.content;
        const comm = new comm_1.CommHandler(content.target_name, content.comm_id, this, () => {
            this._unregisterComm(content.comm_id);
        });
        this._comms.set(content.comm_id, comm);
        try {
            const target = await Private.loadObject(content.target_name, content.target_module, this._targetRegistry);
            await target(comm, msg);
        }
        catch (e) {
            // Close the comm asynchronously. We cannot block message processing on
            // kernel messages to wait for another kernel message.
            comm.close();
            console.error('Exception opening new comm');
            throw e;
        }
    }
    /**
     * Handle 'comm_close' kernel message.
     */
    async _handleCommClose(msg) {
        this._assertCurrentMessage(msg);
        const content = msg.content;
        const comm = this._comms.get(content.comm_id);
        if (!comm) {
            console.error('Comm not found for comm id ' + content.comm_id);
            return;
        }
        this._unregisterComm(comm.commId);
        const onClose = comm.onClose;
        if (onClose) {
            // tslint:disable-next-line:await-promise
            await onClose(msg);
        }
        comm.dispose();
    }
    /**
     * Handle a 'comm_msg' kernel message.
     */
    async _handleCommMsg(msg) {
        this._assertCurrentMessage(msg);
        const content = msg.content;
        const comm = this._comms.get(content.comm_id);
        if (!comm) {
            return;
        }
        const onMsg = comm.onMsg;
        if (onMsg) {
            // tslint:disable-next-line:await-promise
            await onMsg(msg);
        }
    }
    /**
     * Unregister a comm instance.
     */
    _unregisterComm(commId) {
        this._comms.delete(commId);
    }
    /**
     * Handle connection status changes.
     */
    _updateConnectionStatus(connectionStatus) {
        if (this._connectionStatus === connectionStatus) {
            return;
        }
        this._connectionStatus = connectionStatus;
        // If we are not 'connecting', reset any reconnection attempts.
        if (connectionStatus !== 'connecting') {
            this._reconnectAttempt = 0;
            clearTimeout(this._reconnectTimeout);
        }
        if (this.status !== 'dead') {
            if (connectionStatus === 'connected') {
                let restarting = this._kernelSession === RESTARTING_KERNEL_SESSION;
                // Send a kernel info request to make sure we send at least one
                // message to get kernel status back. Always request kernel info
                // first, to get kernel status back and ensure iopub is fully
                // established. If we are restarting, this message will skip the queue
                // and be sent immediately.
                let p = this.requestKernelInfo();
                // Send any pending messages after the kernelInfo resolves, or after a
                // timeout as a failsafe.
                let sendPendingCalled = false;
                let sendPendingOnce = () => {
                    if (sendPendingCalled) {
                        return;
                    }
                    sendPendingCalled = true;
                    if (restarting && this._kernelSession === RESTARTING_KERNEL_SESSION) {
                        // We were restarting and a message didn't arrive to set the
                        // session, but we just assume the restart succeeded and send any
                        // pending messages.
                        // FIXME: it would be better to retry the kernel_info_request here
                        this._kernelSession = '';
                    }
                    clearTimeout(timeoutHandle);
                    if (this._pendingMessages.length > 0) {
                        this._sendPending();
                    }
                };
                void p.then(sendPendingOnce);
                // FIXME: if sent while zmq subscriptions are not established,
                // kernelInfo may not resolve, so use a timeout to ensure we don't hang forever.
                // It may be preferable to retry kernelInfo rather than give up after one timeout.
                let timeoutHandle = setTimeout(sendPendingOnce, KERNEL_INFO_TIMEOUT);
            }
            else {
                // If the connection is down, then we do not know what is happening
                // with the kernel, so set the status to unknown.
                this._updateStatus('unknown');
            }
        }
        // Notify others that the connection status changed.
        this._connectionStatusChanged.emit(connectionStatus);
    }
    async _handleMessage(msg) {
        var _a, _b;
        let handled = false;
        // Check to see if we have a display_id we need to reroute.
        if (msg.parent_header &&
            msg.channel === 'iopub' &&
            (KernelMessage.isDisplayDataMsg(msg) ||
                KernelMessage.isUpdateDisplayDataMsg(msg) ||
                KernelMessage.isExecuteResultMsg(msg))) {
            // display_data messages may re-route based on their display_id.
            const transient = ((_a = msg.content.transient) !== null && _a !== void 0 ? _a : {});
            const displayId = transient['display_id'];
            if (displayId) {
                handled = await this._handleDisplayId(displayId, msg);
                // The await above may make this message out of date, so check again.
                this._assertCurrentMessage(msg);
            }
        }
        if (!handled && msg.parent_header) {
            const parentHeader = msg.parent_header;
            const future = (_b = this._futures) === null || _b === void 0 ? void 0 : _b.get(parentHeader.msg_id);
            if (future) {
                await future.handleMsg(msg);
                this._assertCurrentMessage(msg);
            }
            else {
                // If the message was sent by us and was not iopub, it is orphaned.
                const owned = parentHeader.session === this.clientId;
                if (msg.channel !== 'iopub' && owned) {
                    this._unhandledMessage.emit(msg);
                }
            }
        }
        if (msg.channel === 'iopub') {
            switch (msg.header.msg_type) {
                case 'status': {
                    // Updating the status is synchronous, and we call no async user code
                    const executionState = msg.content
                        .execution_state;
                    if (executionState === 'restarting') {
                        // The kernel has been auto-restarted by the server. After
                        // processing for this message is completely done, we want to
                        // handle this restart, so we don't await, but instead schedule
                        // the work as a microtask (i.e., in a promise resolution). We
                        // schedule this here so that it comes before any microtasks that
                        // might be scheduled in the status signal emission below.
                        void Promise.resolve().then(async () => {
                            this._updateStatus('autorestarting');
                            this._clearKernelState();
                            // We must reconnect since the kernel connection information may have
                            // changed, and the server only refreshes its zmq connection when a new
                            // websocket is opened.
                            await this.reconnect();
                        });
                    }
                    this._updateStatus(executionState);
                    break;
                }
                case 'comm_open':
                    if (this.handleComms) {
                        await this._handleCommOpen(msg);
                    }
                    break;
                case 'comm_msg':
                    if (this.handleComms) {
                        await this._handleCommMsg(msg);
                    }
                    break;
                case 'comm_close':
                    if (this.handleComms) {
                        await this._handleCommClose(msg);
                    }
                    break;
                default:
                    break;
            }
            // If the message was a status dead message, we might have disposed ourselves.
            if (!this.isDisposed) {
                this._assertCurrentMessage(msg);
                // the message wouldn't be emitted if we were disposed anyway.
                this._iopubMessage.emit(msg);
            }
        }
    }
    /**
     * Attempt a connection if we have not exhausted connection attempts.
     */
    _reconnect() {
        this._errorIfDisposed();
        // Clear any existing reconnection attempt
        clearTimeout(this._reconnectTimeout);
        // Update the connection status and schedule a possible reconnection.
        if (this._reconnectAttempt < this._reconnectLimit) {
            this._updateConnectionStatus('connecting');
            // The first reconnect attempt should happen immediately, and subsequent
            // attempts should pick a random number in a growing range so that we
            // don't overload the server with synchronized reconnection attempts
            // across multiple kernels.
            const timeout = Private.getRandomIntInclusive(0, 1e3 * (Math.pow(2, this._reconnectAttempt) - 1));
            console.warn(`Connection lost, reconnecting in ${Math.floor(timeout / 1000)} seconds.`);
            // Try reconnection with subprotocols if the server had supported them.
            // Otherwise, try reconnection without subprotocols.
            const useProtocols = this._selectedProtocol !== '' ? true : false;
            this._reconnectTimeout = setTimeout(this._createSocket, timeout, useProtocols);
            this._reconnectAttempt += 1;
        }
        else {
            this._updateConnectionStatus('disconnected');
        }
        // Clear the websocket event handlers and the socket itself.
        this._clearSocket();
    }
    /**
     * Utility function to throw an error if this instance is disposed.
     */
    _errorIfDisposed() {
        if (this.isDisposed) {
            throw new Error('Kernel connection is disposed');
        }
    }
    get hasPendingInput() {
        return this._hasPendingInput;
    }
    set hasPendingInput(value) {
        this._hasPendingInput = value;
        this._pendingInput.emit(value);
    }
}
exports.KernelConnection = KernelConnection;
/**
 * A private namespace for the Kernel.
 */
var Private;
(function (Private) {
    /**
     * Log the current kernel status.
     */
    function logKernelStatus(kernel) {
        switch (kernel.status) {
            case 'idle':
            case 'busy':
            case 'unknown':
                return;
            default:
                console.debug(`Kernel: ${kernel.status} (${kernel.id})`);
                break;
        }
    }
    Private.logKernelStatus = logKernelStatus;
    /**
     * Send a kernel message to the kernel and resolve the reply message.
     */
    async function handleShellMessage(kernel, msg) {
        const future = kernel.sendShellMessage(msg, true);
        return future.done;
    }
    Private.handleShellMessage = handleShellMessage;
    /**
     * Try to load an object from a module or a registry.
     *
     * Try to load an object from a module asynchronously if a module
     * is specified, otherwise tries to load an object from the global
     * registry, if the global registry is provided.
     *
     * #### Notes
     * Loading a module uses requirejs.
     */
    function loadObject(name, moduleName, registry) {
        return new Promise((resolve, reject) => {
            // Try loading the module using require.js
            if (moduleName) {
                if (typeof requirejs === 'undefined') {
                    throw new Error('requirejs not found');
                }
                requirejs([moduleName], (mod) => {
                    if (mod[name] === void 0) {
                        const msg = `Object '${name}' not found in module '${moduleName}'`;
                        reject(new Error(msg));
                    }
                    else {
                        resolve(mod[name]);
                    }
                }, reject);
            }
            else {
                if (registry === null || registry === void 0 ? void 0 : registry[name]) {
                    resolve(registry[name]);
                }
                else {
                    reject(new Error(`Object '${name}' not found in registry`));
                }
            }
        });
    }
    Private.loadObject = loadObject;
    /**
     * Get a random integer between min and max, inclusive of both.
     *
     * #### Notes
     * From
     * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random#Getting_a_random_integer_between_two_values_inclusive
     *
     * From the MDN page: It might be tempting to use Math.round() to accomplish
     * that, but doing so would cause your random numbers to follow a non-uniform
     * distribution, which may not be acceptable for your needs.
     */
    function getRandomIntInclusive(min, max) {
        min = Math.ceil(min);
        max = Math.floor(max);
        return Math.floor(Math.random() * (max - min + 1)) + min;
    }
    Private.getRandomIntInclusive = getRandomIntInclusive;
})(Private || (Private = {}));
//# sourceMappingURL=default.js.map

/***/ }),

/***/ 134:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.KernelShellFutureHandler = exports.KernelControlFutureHandler = exports.KernelFutureHandler = void 0;
const coreutils_1 = __webpack_require__(5764);
const disposable_1 = __webpack_require__(7556);
const KernelMessage = __importStar(__webpack_require__(9909));
/**
 * Implementation of a kernel future.
 *
 * If a reply is expected, the Future is considered done when both a `reply`
 * message and an `idle` iopub status message have been received.  Otherwise, it
 * is considered done when the `idle` status is received.
 *
 */
class KernelFutureHandler extends disposable_1.DisposableDelegate {
    /**
     * Construct a new KernelFutureHandler.
     */
    constructor(cb, msg, expectReply, disposeOnDone, kernel) {
        super(cb);
        this._status = 0;
        this._stdin = Private.noOp;
        this._iopub = Private.noOp;
        this._reply = Private.noOp;
        this._done = new coreutils_1.PromiseDelegate();
        this._hooks = new Private.HookList();
        this._disposeOnDone = true;
        this._msg = msg;
        if (!expectReply) {
            this._setFlag(Private.KernelFutureFlag.GotReply);
        }
        this._disposeOnDone = disposeOnDone;
        this._kernel = kernel;
    }
    /**
     * Get the original outgoing message.
     */
    get msg() {
        return this._msg;
    }
    /**
     * A promise that resolves when the future is done.
     */
    get done() {
        return this._done.promise;
    }
    /**
     * Get the reply handler.
     */
    get onReply() {
        return this._reply;
    }
    /**
     * Set the reply handler.
     */
    set onReply(cb) {
        this._reply = cb;
    }
    /**
     * Get the iopub handler.
     */
    get onIOPub() {
        return this._iopub;
    }
    /**
     * Set the iopub handler.
     */
    set onIOPub(cb) {
        this._iopub = cb;
    }
    /**
     * Get the stdin handler.
     */
    get onStdin() {
        return this._stdin;
    }
    /**
     * Set the stdin handler.
     */
    set onStdin(cb) {
        this._stdin = cb;
    }
    /**
     * Register hook for IOPub messages.
     *
     * @param hook - The callback invoked for an IOPub message.
     *
     * #### Notes
     * The IOPub hook system allows you to preempt the handlers for IOPub
     * messages handled by the future.
     *
     * The most recently registered hook is run first. A hook can return a
     * boolean or a promise to a boolean, in which case all kernel message
     * processing pauses until the promise is fulfilled. If a hook return value
     * resolves to false, any later hooks will not run and the function will
     * return a promise resolving to false. If a hook throws an error, the error
     * is logged to the console and the next hook is run. If a hook is
     * registered during the hook processing, it will not run until the next
     * message. If a hook is removed during the hook processing, it will be
     * deactivated immediately.
     */
    registerMessageHook(hook) {
        if (this.isDisposed) {
            throw new Error('Kernel future is disposed');
        }
        this._hooks.add(hook);
    }
    /**
     * Remove a hook for IOPub messages.
     *
     * @param hook - The hook to remove.
     *
     * #### Notes
     * If a hook is removed during the hook processing, it will be deactivated immediately.
     */
    removeMessageHook(hook) {
        if (this.isDisposed) {
            return;
        }
        this._hooks.remove(hook);
    }
    /**
     * Send an `input_reply` message.
     */
    sendInputReply(content, parent_header) {
        this._kernel.sendInputReply(content, parent_header);
    }
    /**
     * Dispose and unregister the future.
     */
    dispose() {
        this._stdin = Private.noOp;
        this._iopub = Private.noOp;
        this._reply = Private.noOp;
        this._hooks = null;
        if (!this._testFlag(Private.KernelFutureFlag.IsDone)) {
            // TODO: Uncomment the following logging code, and check for any tests that trigger it.
            // let status = [];
            // if (!this._testFlag(Private.KernelFutureFlag.GotIdle)) {
            //   status.push('idle');
            // }
            // if (!this._testFlag(Private.KernelFutureFlag.GotReply)) {
            //   status.push('reply');
            // }
            // console.warn(
            //   `*************** DISPOSED BEFORE DONE: K${this._kernel.id.slice(
            //     0,
            //     6
            //   )} M${this._msg.header.msg_id.slice(0, 6)} missing ${status.join(' ')}`
            // );
            // Reject the `done` promise, but catch its error here in case no one else
            // is waiting for the promise to resolve. This prevents the error from
            // being displayed in the console, but does not prevent it from being
            // caught by a client who is waiting for it.
            // Note: any `.then` and `.finally` attached to the `done` promise
            // will cause the error to be thrown as uncaught anyways.
            this._done.promise.catch(() => {
                /* no-op */
            });
            this._done.reject(new Error(`Canceled future for ${this.msg.header.msg_type} message before replies were done`));
        }
        super.dispose();
    }
    /**
     * Handle an incoming kernel message.
     */
    async handleMsg(msg) {
        switch (msg.channel) {
            case 'control':
            case 'shell':
                if (msg.channel === this.msg.channel &&
                    msg.parent_header.msg_id === this.msg.header.msg_id) {
                    await this._handleReply(msg);
                }
                break;
            case 'stdin':
                await this._handleStdin(msg);
                break;
            case 'iopub':
                await this._handleIOPub(msg);
                break;
            default:
                break;
        }
    }
    async _handleReply(msg) {
        const reply = this._reply;
        if (reply) {
            // tslint:disable-next-line:await-promise
            await reply(msg);
        }
        this._replyMsg = msg;
        this._setFlag(Private.KernelFutureFlag.GotReply);
        if (this._testFlag(Private.KernelFutureFlag.GotIdle)) {
            this._handleDone();
        }
    }
    async _handleStdin(msg) {
        this._kernel.hasPendingInput = true;
        const stdin = this._stdin;
        if (stdin) {
            // tslint:disable-next-line:await-promise
            await stdin(msg);
        }
    }
    async _handleIOPub(msg) {
        const process = await this._hooks.process(msg);
        const iopub = this._iopub;
        if (process && iopub) {
            // tslint:disable-next-line:await-promise
            await iopub(msg);
        }
        if (KernelMessage.isStatusMsg(msg) &&
            msg.content.execution_state === 'idle') {
            this._setFlag(Private.KernelFutureFlag.GotIdle);
            if (this._testFlag(Private.KernelFutureFlag.GotReply)) {
                this._handleDone();
            }
        }
    }
    _handleDone() {
        if (this._testFlag(Private.KernelFutureFlag.IsDone)) {
            return;
        }
        this._setFlag(Private.KernelFutureFlag.IsDone);
        this._done.resolve(this._replyMsg);
        if (this._disposeOnDone) {
            this.dispose();
        }
    }
    /**
     * Test whether the given future flag is set.
     */
    _testFlag(flag) {
        // tslint:disable-next-line
        return (this._status & flag) !== 0;
    }
    /**
     * Set the given future flag.
     */
    _setFlag(flag) {
        // tslint:disable-next-line
        this._status |= flag;
    }
}
exports.KernelFutureHandler = KernelFutureHandler;
class KernelControlFutureHandler extends KernelFutureHandler {
}
exports.KernelControlFutureHandler = KernelControlFutureHandler;
class KernelShellFutureHandler extends KernelFutureHandler {
}
exports.KernelShellFutureHandler = KernelShellFutureHandler;
var Private;
(function (Private) {
    /**
     * A no-op function.
     */
    Private.noOp = () => {
        /* no-op */
    };
    /**
     * Defer a computation.
     *
     * #### NOTES
     * We can't just use requestAnimationFrame since it is not available in node.
     * This implementation is from Phosphor:
     * https://github.com/phosphorjs/phosphor/blob/e88e4321289bb1198f3098e7bda40736501f2ed8/tests/test-messaging/src/index.spec.ts#L63
     */
    const defer = (() => {
        const ok = typeof requestAnimationFrame === 'function';
        return ok ? requestAnimationFrame : setImmediate;
    })();
    class HookList {
        constructor() {
            this._hooks = [];
        }
        /**
         * Register a hook.
         *
         * @param hook - The callback to register.
         */
        add(hook) {
            this.remove(hook);
            this._hooks.push(hook);
        }
        /**
         * Remove a hook, if it exists in the hook list.
         *
         * @param hook - The callback to remove.
         */
        remove(hook) {
            const index = this._hooks.indexOf(hook);
            if (index >= 0) {
                this._hooks[index] = null;
                this._scheduleCompact();
            }
        }
        /**
         * Process a message through the hooks.
         *
         * @returns a promise resolving to false if any hook resolved as false,
         * otherwise true
         *
         * #### Notes
         * The most recently registered hook is run first. A hook can return a
         * boolean or a promise to a boolean, in which case processing pauses until
         * the promise is fulfilled. If a hook return value resolves to false, any
         * later hooks will not run and the function will return a promise resolving
         * to false. If a hook throws an error, the error is logged to the console
         * and the next hook is run. If a hook is registered during the hook
         * processing, it will not run until the next message. If a hook is removed
         * during the hook processing, it will be deactivated immediately.
         */
        async process(msg) {
            // Wait until we can start a new process run.
            await this._processing;
            // Start the next process run.
            const processing = new coreutils_1.PromiseDelegate();
            this._processing = processing.promise;
            let continueHandling;
            // Call the end hook (most recently-added) first. Starting at the end also
            // guarantees that hooks added during the processing will not be run in
            // this process run.
            for (let i = this._hooks.length - 1; i >= 0; i--) {
                const hook = this._hooks[i];
                // If the hook has been removed, continue to the next one.
                if (hook === null) {
                    continue;
                }
                // Execute the hook and log any errors.
                try {
                    // tslint:disable-next-line:await-promise
                    continueHandling = await hook(msg);
                }
                catch (err) {
                    continueHandling = true;
                    console.error(err);
                }
                // If the hook resolved to false, stop processing and return.
                if (continueHandling === false) {
                    processing.resolve(undefined);
                    return false;
                }
            }
            // All hooks returned true (or errored out), so return true.
            processing.resolve(undefined);
            return true;
        }
        /**
         * Schedule a cleanup of the list, removing any hooks that have been nulled out.
         */
        _scheduleCompact() {
            if (!this._compactScheduled) {
                this._compactScheduled = true;
                // Schedule a compaction in between processing runs. We do the
                // scheduling in an animation frame to rate-limit our compactions. If we
                // need to compact more frequently, we can change this to directly
                // schedule the compaction.
                defer(() => {
                    this._processing = this._processing.then(() => {
                        this._compactScheduled = false;
                        this._compact();
                    });
                });
            }
        }
        /**
         * Compact the list, removing any nulls.
         */
        _compact() {
            let numNulls = 0;
            for (let i = 0, len = this._hooks.length; i < len; i++) {
                const hook = this._hooks[i];
                if (this._hooks[i] === null) {
                    numNulls++;
                }
                else {
                    this._hooks[i - numNulls] = hook;
                }
            }
            this._hooks.length -= numNulls;
        }
    }
    Private.HookList = HookList;
    /**
     * Bit flags for the kernel future state.
     */
    let KernelFutureFlag;
    (function (KernelFutureFlag) {
        KernelFutureFlag[KernelFutureFlag["GotReply"] = 1] = "GotReply";
        KernelFutureFlag[KernelFutureFlag["GotIdle"] = 2] = "GotIdle";
        KernelFutureFlag[KernelFutureFlag["IsDone"] = 4] = "IsDone";
        KernelFutureFlag[KernelFutureFlag["DisposeOnDone"] = 8] = "DisposeOnDone";
    })(KernelFutureFlag = Private.KernelFutureFlag || (Private.KernelFutureFlag = {}));
})(Private || (Private = {}));
//# sourceMappingURL=future.js.map

/***/ }),

/***/ 973:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
var __exportStar = (this && this.__exportStar) || function(m, exports) {
    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.KernelConnection = exports.KernelAPI = exports.KernelMessage = exports.Kernel = void 0;
// Namespace some of our modules for convenience and backwards compatibility.
const Kernel = __importStar(__webpack_require__(2956));
exports.Kernel = Kernel;
const KernelMessage = __importStar(__webpack_require__(9909));
exports.KernelMessage = KernelMessage;
const KernelAPI = __importStar(__webpack_require__(8235));
exports.KernelAPI = KernelAPI;
const default_1 = __webpack_require__(2456);
Object.defineProperty(exports, "KernelConnection", ({ enumerable: true, get: function () { return default_1.KernelConnection; } }));
__exportStar(__webpack_require__(5198), exports);
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 2956:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
//# sourceMappingURL=kernel.js.map

/***/ }),

/***/ 5198:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.KernelManager = void 0;
const polling_1 = __webpack_require__(6049);
const signaling_1 = __webpack_require__(3992);
const __1 = __webpack_require__(7883);
const basemanager_1 = __webpack_require__(3867);
const restapi_1 = __webpack_require__(8235);
const default_1 = __webpack_require__(2456);
/**
 * An implementation of a kernel manager.
 */
class KernelManager extends basemanager_1.BaseManager {
    /**
     * Construct a new kernel manager.
     *
     * @param options - The default options for kernel.
     */
    constructor(options = {}) {
        var _a;
        super(options);
        this._isReady = false;
        this._kernelConnections = new Set();
        this._models = new Map();
        this._runningChanged = new signaling_1.Signal(this);
        this._connectionFailure = new signaling_1.Signal(this);
        // Start model and specs polling with exponential backoff.
        this._pollModels = new polling_1.Poll({
            auto: false,
            factory: () => this.requestRunning(),
            frequency: {
                interval: 10 * 1000,
                backoff: true,
                max: 300 * 1000
            },
            name: `@jupyterlab/services:KernelManager#models`,
            standby: (_a = options.standby) !== null && _a !== void 0 ? _a : 'when-hidden'
        });
        // Initialize internal data.
        this._ready = (async () => {
            await this._pollModels.start();
            await this._pollModels.tick;
            this._isReady = true;
        })();
    }
    /**
     * Test whether the manager is ready.
     */
    get isReady() {
        return this._isReady;
    }
    /**
     * A promise that fulfills when the manager is ready.
     */
    get ready() {
        return this._ready;
    }
    /**
     * A signal emitted when the running kernels change.
     */
    get runningChanged() {
        return this._runningChanged;
    }
    /**
     * A signal emitted when there is a connection failure.
     */
    get connectionFailure() {
        return this._connectionFailure;
    }
    /**
     * Dispose of the resources used by the manager.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._models.clear();
        this._kernelConnections.forEach(x => x.dispose());
        this._pollModels.dispose();
        super.dispose();
    }
    /**
     * Connect to an existing kernel.
     *
     * @returns The new kernel connection.
     *
     * #### Notes
     * This will use the manager's server settings and ignore any server
     * settings passed in the options.
     */
    connectTo(options) {
        var _a;
        const { id } = options.model;
        let handleComms = (_a = options.handleComms) !== null && _a !== void 0 ? _a : true;
        // By default, handle comms only if no other kernel connection is.
        if (options.handleComms === undefined) {
            for (const kc of this._kernelConnections) {
                if (kc.id === id && kc.handleComms) {
                    handleComms = false;
                    break;
                }
            }
        }
        const kernelConnection = new default_1.KernelConnection({
            handleComms,
            ...options,
            serverSettings: this.serverSettings
        });
        this._onStarted(kernelConnection);
        if (!this._models.has(id)) {
            // We trust the user to connect to an existing kernel, but we verify
            // asynchronously.
            void this.refreshRunning().catch(() => {
                /* no-op */
            });
        }
        return kernelConnection;
    }
    /**
     * Create an iterator over the most recent running kernels.
     *
     * @returns A new iterator over the running kernels.
     */
    running() {
        return this._models.values();
    }
    /**
     * The number of running kernels.
     */
    get runningCount() {
        return this._models.size;
    }
    /**
     * Force a refresh of the running kernels.
     *
     * @returns A promise that resolves when the running list has been refreshed.
     *
     * #### Notes
     * This is not typically meant to be called by the user, since the
     * manager maintains its own internal state.
     */
    async refreshRunning() {
        await this._pollModels.refresh();
        await this._pollModels.tick;
    }
    /**
     * Start a new kernel.
     *
     * @param createOptions - The kernel creation options
     *
     * @param connectOptions - The kernel connection options
     *
     * @returns A promise that resolves with the kernel connection.
     *
     * #### Notes
     * The manager `serverSettings` will be always be used.
     */
    async startNew(createOptions = {}, connectOptions = {}) {
        const model = await (0, restapi_1.startNew)(createOptions, this.serverSettings);
        return this.connectTo({
            ...connectOptions,
            model
        });
    }
    /**
     * Shut down a kernel by id.
     *
     * @param id - The id of the target kernel.
     *
     * @returns A promise that resolves when the operation is complete.
     */
    async shutdown(id) {
        await (0, restapi_1.shutdownKernel)(id, this.serverSettings);
        await this.refreshRunning();
    }
    /**
     * Shut down all kernels.
     *
     * @returns A promise that resolves when all of the kernels are shut down.
     */
    async shutdownAll() {
        // Update the list of models to make sure our list is current.
        await this.refreshRunning();
        // Shut down all models.
        await Promise.all([...this._models.keys()].map(id => (0, restapi_1.shutdownKernel)(id, this.serverSettings)));
        // Update the list of models to clear out our state.
        await this.refreshRunning();
    }
    /**
     * Find a kernel by id.
     *
     * @param id - The id of the target kernel.
     *
     * @returns A promise that resolves with the kernel's model.
     */
    async findById(id) {
        if (this._models.has(id)) {
            return this._models.get(id);
        }
        await this.refreshRunning();
        return this._models.get(id);
    }
    /**
     * Execute a request to the server to poll running kernels and update state.
     */
    async requestRunning() {
        var _a, _b;
        let models;
        try {
            models = await (0, restapi_1.listRunning)(this.serverSettings);
        }
        catch (err) {
            // Handle network errors, as well as cases where we are on a
            // JupyterHub and the server is not running. JupyterHub returns a
            // 503 (<2.0) or 424 (>2.0) in that case.
            if (err instanceof __1.ServerConnection.NetworkError ||
                ((_a = err.response) === null || _a === void 0 ? void 0 : _a.status) === 503 ||
                ((_b = err.response) === null || _b === void 0 ? void 0 : _b.status) === 424) {
                this._connectionFailure.emit(err);
            }
            throw err;
        }
        if (this.isDisposed) {
            return;
        }
        if (this._models.size === models.length &&
            models.every(model => {
                const existing = this._models.get(model.id);
                if (!existing) {
                    return false;
                }
                return (existing.connections === model.connections &&
                    existing.execution_state === model.execution_state &&
                    existing.last_activity === model.last_activity &&
                    existing.name === model.name &&
                    existing.reason === model.reason &&
                    existing.traceback === model.traceback);
            })) {
            // Identical models list (presuming models does not contain duplicate
            // ids), so just return
            return;
        }
        this._models = new Map(models.map(x => [x.id, x]));
        // For any kernel connection to a kernel that doesn't exist, notify it of
        // the shutdown.
        this._kernelConnections.forEach(kc => {
            if (!this._models.has(kc.id)) {
                kc.handleShutdown();
            }
        });
        this._runningChanged.emit(models);
    }
    /**
     * Handle a kernel starting.
     */
    _onStarted(kernelConnection) {
        this._kernelConnections.add(kernelConnection);
        kernelConnection.statusChanged.connect(this._onStatusChanged, this);
        kernelConnection.disposed.connect(this._onDisposed, this);
    }
    _onDisposed(kernelConnection) {
        this._kernelConnections.delete(kernelConnection);
        // A dispose emission could mean the server session is deleted, or that
        // the kernel JS object is disposed and the kernel still exists on the
        // server, so we refresh from the server to make sure we reflect the
        // server state.
        void this.refreshRunning().catch(() => {
            /* no-op */
        });
    }
    _onStatusChanged(kernelConnection, status) {
        if (status === 'dead') {
            // We asynchronously update our list of kernels, which asynchronously
            // will dispose them. We do not want to immediately dispose them because
            // there may be other signal handlers that want to be called.
            void this.refreshRunning().catch(() => {
                /* no-op */
            });
        }
    }
}
exports.KernelManager = KernelManager;
/**
 * The namespace for `KernelManager` class statics.
 */
(function (KernelManager) {
    /**
     * A no-op kernel manager to be used when starting kernels.
     */
    class NoopManager extends KernelManager {
        constructor() {
            super(...arguments);
            this._readyPromise = new Promise(() => {
                /* no-op */
            });
        }
        /**
         * Whether the manager is active.
         */
        get isActive() {
            return false;
        }
        /**
         * Used for testing.
         */
        get parentReady() {
            return super.ready;
        }
        /**
         * Start a new kernel - throws an error since it is not supported.
         */
        async startNew(createOptions = {}, connectOptions = {}) {
            return Promise.reject(new Error('Not implemented in no-op Kernel Manager'));
        }
        /**
         * Connect to an existing kernel - throws an error since it is not supported.
         */
        connectTo(options) {
            throw new Error('Not implemented in no-op Kernel Manager');
        }
        /**
         * Shut down a kernel by id - throws an error since it is not supported.
         */
        async shutdown(id) {
            return Promise.reject(new Error('Not implemented in no-op Kernel Manager'));
        }
        /**
         * A promise that fulfills when the manager is ready (never).
         */
        get ready() {
            return this.parentReady.then(() => this._readyPromise);
        }
        /**
         * Execute a request to the server to poll running kernels and update state.
         */
        async requestRunning() {
            return Promise.resolve();
        }
    }
    KernelManager.NoopManager = NoopManager;
})(KernelManager || (exports.KernelManager = KernelManager = {}));
//# sourceMappingURL=manager.js.map

/***/ }),

/***/ 9909:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.supportedKernelWebSocketProtocols = exports.isInputReplyMsg = exports.isInputRequestMsg = exports.isDebugReplyMsg = exports.isDebugRequestMsg = exports.isExecuteReplyMsg = exports.isInfoRequestMsg = exports.isCommMsgMsg = exports.isCommCloseMsg = exports.isCommOpenMsg = exports.isDebugEventMsg = exports.isClearOutputMsg = exports.isStatusMsg = exports.isErrorMsg = exports.isExecuteResultMsg = exports.isExecuteInputMsg = exports.isUpdateDisplayDataMsg = exports.isDisplayDataMsg = exports.isStreamMsg = exports.createMessage = void 0;
const coreutils_1 = __webpack_require__(5764);
function createMessage(options) {
    var _a, _b, _c, _d, _e;
    return {
        buffers: (_a = options.buffers) !== null && _a !== void 0 ? _a : [],
        channel: options.channel,
        content: options.content,
        header: {
            date: new Date().toISOString(),
            msg_id: (_b = options.msgId) !== null && _b !== void 0 ? _b : coreutils_1.UUID.uuid4(),
            msg_type: options.msgType,
            session: options.session,
            username: (_c = options.username) !== null && _c !== void 0 ? _c : '',
            version: '5.2'
        },
        metadata: (_d = options.metadata) !== null && _d !== void 0 ? _d : {},
        parent_header: (_e = options.parentHeader) !== null && _e !== void 0 ? _e : {}
    };
}
exports.createMessage = createMessage;
/**
 * Test whether a kernel message is a `'stream'` message.
 */
function isStreamMsg(msg) {
    return msg.header.msg_type === 'stream';
}
exports.isStreamMsg = isStreamMsg;
/**
 * Test whether a kernel message is an `'display_data'` message.
 */
function isDisplayDataMsg(msg) {
    return msg.header.msg_type === 'display_data';
}
exports.isDisplayDataMsg = isDisplayDataMsg;
/**
 * Test whether a kernel message is an `'update_display_data'` message.
 */
function isUpdateDisplayDataMsg(msg) {
    return msg.header.msg_type === 'update_display_data';
}
exports.isUpdateDisplayDataMsg = isUpdateDisplayDataMsg;
/**
 * Test whether a kernel message is an `'execute_input'` message.
 */
function isExecuteInputMsg(msg) {
    return msg.header.msg_type === 'execute_input';
}
exports.isExecuteInputMsg = isExecuteInputMsg;
/**
 * Test whether a kernel message is an `'execute_result'` message.
 */
function isExecuteResultMsg(msg) {
    return msg.header.msg_type === 'execute_result';
}
exports.isExecuteResultMsg = isExecuteResultMsg;
/**
 * Test whether a kernel message is an `'error'` message.
 */
function isErrorMsg(msg) {
    return msg.header.msg_type === 'error';
}
exports.isErrorMsg = isErrorMsg;
/**
 * Test whether a kernel message is a `'status'` message.
 */
function isStatusMsg(msg) {
    return msg.header.msg_type === 'status';
}
exports.isStatusMsg = isStatusMsg;
/**
 * Test whether a kernel message is a `'clear_output'` message.
 */
function isClearOutputMsg(msg) {
    return msg.header.msg_type === 'clear_output';
}
exports.isClearOutputMsg = isClearOutputMsg;
/**
 * Test whether a kernel message is an experimental `'debug_event'` message.
 *
 * @hidden
 *
 * #### Notes
 * Debug messages are experimental messages that are not in the official
 * kernel message specification. As such, this is *NOT* considered
 * part of the public API, and may change without notice.
 */
function isDebugEventMsg(msg) {
    return msg.header.msg_type === 'debug_event';
}
exports.isDebugEventMsg = isDebugEventMsg;
/**
 * Test whether a kernel message is a `'comm_open'` message.
 */
function isCommOpenMsg(msg) {
    return msg.header.msg_type === 'comm_open';
}
exports.isCommOpenMsg = isCommOpenMsg;
/**
 * Test whether a kernel message is a `'comm_close'` message.
 */
function isCommCloseMsg(msg) {
    return msg.header.msg_type === 'comm_close';
}
exports.isCommCloseMsg = isCommCloseMsg;
/**
 * Test whether a kernel message is a `'comm_msg'` message.
 */
function isCommMsgMsg(msg) {
    return msg.header.msg_type === 'comm_msg';
}
exports.isCommMsgMsg = isCommMsgMsg;
/**
 * Test whether a kernel message is a `'kernel_info_request'` message.
 */
function isInfoRequestMsg(msg) {
    return msg.header.msg_type === 'kernel_info_request';
}
exports.isInfoRequestMsg = isInfoRequestMsg;
/**
 * Test whether a kernel message is an `'execute_reply'` message.
 */
function isExecuteReplyMsg(msg) {
    return msg.header.msg_type === 'execute_reply';
}
exports.isExecuteReplyMsg = isExecuteReplyMsg;
/**
 * Test whether a kernel message is an experimental `'debug_request'` message.
 *
 * @hidden
 *
 * #### Notes
 * Debug messages are experimental messages that are not in the official
 * kernel message specification. As such, this is *NOT* considered
 * part of the public API, and may change without notice.
 */
function isDebugRequestMsg(msg) {
    return msg.header.msg_type === 'debug_request';
}
exports.isDebugRequestMsg = isDebugRequestMsg;
/**
 * Test whether a kernel message is an experimental `'debug_reply'` message.
 *
 * @hidden
 *
 * #### Notes
 * Debug messages are experimental messages that are not in the official
 * kernel message specification. As such, this is *NOT* considered
 * part of the public API, and may change without notice.
 */
function isDebugReplyMsg(msg) {
    return msg.header.msg_type === 'debug_reply';
}
exports.isDebugReplyMsg = isDebugReplyMsg;
/**
 * Test whether a kernel message is an `'input_request'` message.
 */
function isInputRequestMsg(msg) {
    return msg.header.msg_type === 'input_request';
}
exports.isInputRequestMsg = isInputRequestMsg;
/**
 * Test whether a kernel message is an `'input_reply'` message.
 */
function isInputReplyMsg(msg) {
    return msg.header.msg_type === 'input_reply';
}
exports.isInputReplyMsg = isInputReplyMsg;
// ///////////////////////////////////////////////
// Message (de)serialization
// ///////////////////////////////////////////////
/**
 * The list of supported kernel wire protocols over websocket.
 */
var supportedKernelWebSocketProtocols;
(function (supportedKernelWebSocketProtocols) {
    supportedKernelWebSocketProtocols["v1KernelWebsocketJupyterOrg"] = "v1.kernel.websocket.jupyter.org";
})(supportedKernelWebSocketProtocols || (exports.supportedKernelWebSocketProtocols = supportedKernelWebSocketProtocols = {}));
//# sourceMappingURL=messages.js.map

/***/ }),

/***/ 8235:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.getKernelModel = exports.shutdownKernel = exports.interruptKernel = exports.restartKernel = exports.startNew = exports.listRunning = exports.KERNEL_SERVICE_URL = void 0;
const serverconnection_1 = __webpack_require__(2920);
const coreutils_1 = __webpack_require__(8925);
const validate_1 = __webpack_require__(5855);
/**
 * The url for the kernel service.
 */
exports.KERNEL_SERVICE_URL = 'api/kernels';
/**
 * Fetch the running kernels.
 *
 * @param settings - The optional server settings.
 *
 * @returns A promise that resolves with the list of running kernels.
 *
 * #### Notes
 * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/kernels) and validates the response model.
 *
 * The promise is fulfilled on a valid response and rejected otherwise.
 */
async function listRunning(settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = coreutils_1.URLExt.join(settings.baseUrl, exports.KERNEL_SERVICE_URL);
    const response = await serverconnection_1.ServerConnection.makeRequest(url, {}, settings);
    if (response.status !== 200) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    (0, validate_1.validateModels)(data);
    return data;
}
exports.listRunning = listRunning;
/**
 * Start a new kernel.
 *
 * @param options - The options used to create the kernel.
 *
 * @returns A promise that resolves with a kernel connection object.
 *
 * #### Notes
 * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/kernels) and validates the response model.
 *
 * The promise is fulfilled on a valid response and rejected otherwise.
 */
async function startNew(options = {}, settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = coreutils_1.URLExt.join(settings.baseUrl, exports.KERNEL_SERVICE_URL);
    const init = {
        method: 'POST',
        body: JSON.stringify(options)
    };
    const response = await serverconnection_1.ServerConnection.makeRequest(url, init, settings);
    if (response.status !== 201) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    (0, validate_1.validateModel)(data);
    return data;
}
exports.startNew = startNew;
/**
 * Restart a kernel.
 *
 * #### Notes
 * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/kernels) and validates the response model.
 *
 * The promise is fulfilled on a valid response (and thus after a restart) and rejected otherwise.
 */
async function restartKernel(id, settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = coreutils_1.URLExt.join(settings.baseUrl, exports.KERNEL_SERVICE_URL, encodeURIComponent(id), 'restart');
    const init = { method: 'POST' };
    const response = await serverconnection_1.ServerConnection.makeRequest(url, init, settings);
    if (response.status !== 200) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    (0, validate_1.validateModel)(data);
}
exports.restartKernel = restartKernel;
/**
 * Interrupt a kernel.
 *
 * #### Notes
 * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/kernels) and validates the response model.
 *
 * The promise is fulfilled on a valid response and rejected otherwise.
 */
async function interruptKernel(id, settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = coreutils_1.URLExt.join(settings.baseUrl, exports.KERNEL_SERVICE_URL, encodeURIComponent(id), 'interrupt');
    const init = { method: 'POST' };
    const response = await serverconnection_1.ServerConnection.makeRequest(url, init, settings);
    if (response.status !== 204) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
}
exports.interruptKernel = interruptKernel;
/**
 * Shut down a kernel.
 *
 * @param id - The id of the running kernel.
 *
 * @param settings - The server settings for the request.
 *
 * @returns A promise that resolves when the kernel is shut down.
 *
 *
 * #### Notes
 * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/kernels) and validates the response model.
 *
 * The promise is fulfilled on a valid response and rejected otherwise.
 */
async function shutdownKernel(id, settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = coreutils_1.URLExt.join(settings.baseUrl, exports.KERNEL_SERVICE_URL, encodeURIComponent(id));
    const init = { method: 'DELETE' };
    const response = await serverconnection_1.ServerConnection.makeRequest(url, init, settings);
    if (response.status === 404) {
        const msg = `The kernel "${id}" does not exist on the server`;
        console.warn(msg);
    }
    else if (response.status !== 204) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
}
exports.shutdownKernel = shutdownKernel;
/**
 * Get a full kernel model from the server by kernel id string.
 *
 * #### Notes
 * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/kernels) and validates the response model.
 *
 * The promise is fulfilled on a valid response and rejected otherwise.
 */
async function getKernelModel(id, settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = coreutils_1.URLExt.join(settings.baseUrl, exports.KERNEL_SERVICE_URL, encodeURIComponent(id));
    const response = await serverconnection_1.ServerConnection.makeRequest(url, {}, settings);
    if (response.status === 404) {
        return undefined;
    }
    else if (response.status !== 200) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    (0, validate_1.validateModel)(data);
    return data;
}
exports.getKernelModel = getKernelModel;
//# sourceMappingURL=restapi.js.map

/***/ }),

/***/ 7179:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.deserialize = exports.serialize = void 0;
const KernelMessage = __importStar(__webpack_require__(9909));
/**
 * Serialize a kernel message for transport.
 */
function serialize(msg, protocol = '') {
    switch (protocol) {
        case KernelMessage.supportedKernelWebSocketProtocols
            .v1KernelWebsocketJupyterOrg:
            return Private.serializeV1KernelWebsocketJupyterOrg(msg);
        default:
            return Private.serializeDefault(msg);
    }
}
exports.serialize = serialize;
/**
 * Deserialize and return the unpacked message.
 */
function deserialize(data, protocol = '') {
    switch (protocol) {
        case KernelMessage.supportedKernelWebSocketProtocols
            .v1KernelWebsocketJupyterOrg:
            return Private.deserializeV1KernelWebsocketJupyterOrg(data);
        default:
            return Private.deserializeDefault(data);
    }
}
exports.deserialize = deserialize;
var Private;
(function (Private) {
    /**
     * Deserialize and return the unpacked message.
     * Protocol `v1.kernel.websocket.jupyter.org`
     */
    function deserializeV1KernelWebsocketJupyterOrg(binMsg) {
        let msg;
        const data = new DataView(binMsg);
        const offsetNumber = Number(data.getBigUint64(0, true /* littleEndian */));
        let offsets = [];
        for (let i = 0; i < offsetNumber; i++) {
            // WARNING: we cast our 64-bit unsigned int to a number!
            // so offsets cannot index up to 2**64 bytes
            offsets.push(Number(data.getBigUint64(8 * (i + 1), true /* littleEndian */)));
        }
        const decoder = new TextDecoder('utf8');
        const channel = decoder.decode(binMsg.slice(offsets[0], offsets[1]));
        const header = JSON.parse(decoder.decode(binMsg.slice(offsets[1], offsets[2])));
        const parent_header = JSON.parse(decoder.decode(binMsg.slice(offsets[2], offsets[3])));
        const metadata = JSON.parse(decoder.decode(binMsg.slice(offsets[3], offsets[4])));
        const content = JSON.parse(decoder.decode(binMsg.slice(offsets[4], offsets[5])));
        let buffers = [];
        for (let i = 5; i < offsets.length - 1; i++) {
            buffers.push(new DataView(binMsg.slice(offsets[i], offsets[i + 1])));
        }
        msg = {
            channel,
            header,
            parent_header,
            metadata,
            content,
            buffers
        };
        return msg;
    }
    Private.deserializeV1KernelWebsocketJupyterOrg = deserializeV1KernelWebsocketJupyterOrg;
    /**
     * Serialize a kernel message for transport.
     * Protocol `v1.kernel.websocket.jupyter.org`
     */
    function serializeV1KernelWebsocketJupyterOrg(msg) {
        const header = JSON.stringify(msg.header);
        const parentHeader = msg.parent_header == null ? '{}' : JSON.stringify(msg.parent_header);
        const metadata = JSON.stringify(msg.metadata);
        const content = JSON.stringify(msg.content);
        const buffers = msg.buffers !== undefined ? msg.buffers : [];
        const offsetNumber = 1 + 4 + buffers.length + 1;
        let offsets = [];
        offsets.push(8 * (1 + offsetNumber));
        offsets.push(msg.channel.length + offsets[offsets.length - 1]);
        const encoder = new TextEncoder();
        const channelEncoded = encoder.encode(msg.channel);
        const headerEncoded = encoder.encode(header);
        const parentHeaderEncoded = encoder.encode(parentHeader);
        const metadataEncoded = encoder.encode(metadata);
        const contentEncoded = encoder.encode(content);
        const binMsgNoBuff = new Uint8Array(channelEncoded.length +
            headerEncoded.length +
            parentHeaderEncoded.length +
            metadataEncoded.length +
            contentEncoded.length);
        binMsgNoBuff.set(channelEncoded);
        binMsgNoBuff.set(headerEncoded, channelEncoded.length);
        binMsgNoBuff.set(parentHeaderEncoded, channelEncoded.length + headerEncoded.length);
        binMsgNoBuff.set(metadataEncoded, channelEncoded.length + headerEncoded.length + parentHeaderEncoded.length);
        binMsgNoBuff.set(contentEncoded, channelEncoded.length +
            headerEncoded.length +
            parentHeaderEncoded.length +
            metadataEncoded.length);
        for (let length of [
            headerEncoded.length,
            parentHeaderEncoded.length,
            metadataEncoded.length,
            contentEncoded.length
        ]) {
            offsets.push(length + offsets[offsets.length - 1]);
        }
        let buffersByteLength = 0;
        for (let buffer of buffers) {
            let length = buffer.byteLength;
            offsets.push(length + offsets[offsets.length - 1]);
            buffersByteLength += length;
        }
        const binMsg = new Uint8Array(8 * (1 + offsetNumber) + binMsgNoBuff.byteLength + buffersByteLength);
        const word = new ArrayBuffer(8);
        const data = new DataView(word);
        data.setBigUint64(0, BigInt(offsetNumber), true /* littleEndian */);
        binMsg.set(new Uint8Array(word), 0);
        for (let i = 0; i < offsets.length; i++) {
            data.setBigUint64(0, BigInt(offsets[i]), true /* littleEndian */);
            binMsg.set(new Uint8Array(word), 8 * (i + 1));
        }
        binMsg.set(binMsgNoBuff, offsets[0]);
        for (let i = 0; i < buffers.length; i++) {
            const buffer = buffers[i];
            binMsg.set(new Uint8Array(ArrayBuffer.isView(buffer) ? buffer.buffer : buffer), offsets[5 + i]);
        }
        return binMsg.buffer;
    }
    Private.serializeV1KernelWebsocketJupyterOrg = serializeV1KernelWebsocketJupyterOrg;
    /**
     * Deserialize and return the unpacked message.
     * Default protocol
     *
     * #### Notes
     * Handles JSON blob strings and binary messages.
     */
    function deserializeDefault(data) {
        let value;
        if (typeof data === 'string') {
            value = JSON.parse(data);
        }
        else {
            value = deserializeBinary(data);
        }
        return value;
    }
    Private.deserializeDefault = deserializeDefault;
    /**
     * Serialize a kernel message for transport.
     * Default protocol
     *
     * #### Notes
     * If there is binary content, an `ArrayBuffer` is returned,
     * otherwise the message is converted to a JSON string.
     */
    function serializeDefault(msg) {
        var _a;
        let value;
        if ((_a = msg.buffers) === null || _a === void 0 ? void 0 : _a.length) {
            value = serializeBinary(msg);
        }
        else {
            value = JSON.stringify(msg);
        }
        return value;
    }
    Private.serializeDefault = serializeDefault;
    /**
     * Deserialize a binary message to a Kernel Message.
     */
    function deserializeBinary(buf) {
        const data = new DataView(buf);
        // read the header: 1 + nbufs 32b integers
        const nbufs = data.getUint32(0);
        const offsets = [];
        if (nbufs < 2) {
            throw new Error('Invalid incoming Kernel Message');
        }
        for (let i = 1; i <= nbufs; i++) {
            offsets.push(data.getUint32(i * 4));
        }
        const jsonBytes = new Uint8Array(buf.slice(offsets[0], offsets[1]));
        const msg = JSON.parse(new TextDecoder('utf8').decode(jsonBytes));
        // the remaining chunks are stored as DataViews in msg.buffers
        msg.buffers = [];
        for (let i = 1; i < nbufs; i++) {
            const start = offsets[i];
            const stop = offsets[i + 1] || buf.byteLength;
            msg.buffers.push(new DataView(buf.slice(start, stop)));
        }
        return msg;
    }
    /**
     * Implement the binary serialization protocol.
     *
     * Serialize Kernel message to ArrayBuffer.
     */
    function serializeBinary(msg) {
        const offsets = [];
        const buffers = [];
        const encoder = new TextEncoder();
        let origBuffers = [];
        if (msg.buffers !== undefined) {
            origBuffers = msg.buffers;
            delete msg['buffers'];
        }
        const jsonUtf8 = encoder.encode(JSON.stringify(msg));
        buffers.push(jsonUtf8.buffer);
        for (let i = 0; i < origBuffers.length; i++) {
            // msg.buffers elements could be either views or ArrayBuffers
            // buffers elements are ArrayBuffers
            const b = origBuffers[i];
            buffers.push(ArrayBuffer.isView(b) ? b.buffer : b);
        }
        const nbufs = buffers.length;
        offsets.push(4 * (nbufs + 1));
        for (let i = 0; i + 1 < buffers.length; i++) {
            offsets.push(offsets[offsets.length - 1] + buffers[i].byteLength);
        }
        const msgBuf = new Uint8Array(offsets[offsets.length - 1] + buffers[buffers.length - 1].byteLength);
        // use DataView.setUint32 for network byte-order
        const view = new DataView(msgBuf.buffer);
        // write nbufs to first 4 bytes
        view.setUint32(0, nbufs);
        // write offsets to next 4 * nbufs bytes
        for (let i = 0; i < offsets.length; i++) {
            view.setUint32(4 * (i + 1), offsets[i]);
        }
        // write all the buffers at their respective offsets
        for (let i = 0; i < buffers.length; i++) {
            msgBuf.set(new Uint8Array(buffers[i]), offsets[i]);
        }
        return msgBuf.buffer;
    }
})(Private || (Private = {}));
//# sourceMappingURL=serialize.js.map

/***/ }),

/***/ 5855:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.validateModels = exports.validateModel = exports.validateMessage = void 0;
const validate_1 = __webpack_require__(7441);
/**
 * Required fields for `IKernelHeader`.
 */
const HEADER_FIELDS = ['username', 'version', 'session', 'msg_id', 'msg_type'];
/**
 * Required fields and types for contents of various types of `kernel.IMessage`
 * messages on the iopub channel.
 */
const IOPUB_CONTENT_FIELDS = {
    stream: { name: 'string', text: 'string' },
    display_data: { data: 'object', metadata: 'object' },
    execute_input: { code: 'string', execution_count: 'number' },
    execute_result: {
        execution_count: 'number',
        data: 'object',
        metadata: 'object'
    },
    error: { ename: 'string', evalue: 'string', traceback: 'object' },
    status: {
        execution_state: [
            'string',
            ['starting', 'idle', 'busy', 'restarting', 'dead']
        ]
    },
    clear_output: { wait: 'boolean' },
    comm_open: { comm_id: 'string', target_name: 'string', data: 'object' },
    comm_msg: { comm_id: 'string', data: 'object' },
    comm_close: { comm_id: 'string' },
    shutdown_reply: { restart: 'boolean' } // Emitted by the IPython kernel.
};
/**
 * Validate the header of a kernel message.
 */
function validateHeader(header) {
    for (let i = 0; i < HEADER_FIELDS.length; i++) {
        (0, validate_1.validateProperty)(header, HEADER_FIELDS[i], 'string');
    }
}
/**
 * Validate a kernel message object.
 */
function validateMessage(msg) {
    (0, validate_1.validateProperty)(msg, 'metadata', 'object');
    (0, validate_1.validateProperty)(msg, 'content', 'object');
    (0, validate_1.validateProperty)(msg, 'channel', 'string');
    validateHeader(msg.header);
    if (msg.channel === 'iopub') {
        validateIOPubContent(msg);
    }
}
exports.validateMessage = validateMessage;
/**
 * Validate content an kernel message on the iopub channel.
 */
function validateIOPubContent(msg) {
    if (msg.channel === 'iopub') {
        const fields = IOPUB_CONTENT_FIELDS[msg.header.msg_type];
        // Check for unknown message type.
        if (fields === undefined) {
            return;
        }
        const names = Object.keys(fields);
        const content = msg.content;
        for (let i = 0; i < names.length; i++) {
            let args = fields[names[i]];
            if (!Array.isArray(args)) {
                args = [args];
            }
            (0, validate_1.validateProperty)(content, names[i], ...args);
        }
    }
}
/**
 * Validate a `Kernel.IModel` object.
 */
function validateModel(model) {
    (0, validate_1.validateProperty)(model, 'name', 'string');
    (0, validate_1.validateProperty)(model, 'id', 'string');
}
exports.validateModel = validateModel;
/**
 * Validate an array of `IModel` objects.
 */
function validateModels(models) {
    if (!Array.isArray(models)) {
        throw new Error('Invalid kernel list');
    }
    models.forEach(d => validateModel(d));
}
exports.validateModels = validateModels;
//# sourceMappingURL=validate.js.map

/***/ }),

/***/ 2946:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
var __exportStar = (this && this.__exportStar) || function(m, exports) {
    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.KernelSpecAPI = exports.KernelSpec = void 0;
const KernelSpec = __importStar(__webpack_require__(4806));
exports.KernelSpec = KernelSpec;
const KernelSpecAPI = __importStar(__webpack_require__(6492));
exports.KernelSpecAPI = KernelSpecAPI;
__exportStar(__webpack_require__(733), exports);
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 4806:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
//# sourceMappingURL=kernelspec.js.map

/***/ }),

/***/ 733:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.KernelSpecManager = void 0;
const coreutils_1 = __webpack_require__(5764);
const polling_1 = __webpack_require__(6049);
const signaling_1 = __webpack_require__(3992);
const restapi = __importStar(__webpack_require__(6492));
const basemanager_1 = __webpack_require__(3867);
/**
 * An implementation of a kernel spec manager.
 */
class KernelSpecManager extends basemanager_1.BaseManager {
    /**
     * Construct a new kernel spec manager.
     *
     * @param options - The default options for kernel.
     */
    constructor(options = {}) {
        var _a;
        super(options);
        this._isReady = false;
        this._connectionFailure = new signaling_1.Signal(this);
        this._specs = null;
        this._specsChanged = new signaling_1.Signal(this);
        // Initialize internal data.
        this._ready = Promise.all([this.requestSpecs()])
            .then(_ => undefined)
            .catch(_ => undefined)
            .then(() => {
            if (this.isDisposed) {
                return;
            }
            this._isReady = true;
        });
        this._pollSpecs = new polling_1.Poll({
            auto: false,
            factory: () => this.requestSpecs(),
            frequency: {
                interval: 61 * 1000,
                backoff: true,
                max: 300 * 1000
            },
            name: `@jupyterlab/services:KernelSpecManager#specs`,
            standby: (_a = options.standby) !== null && _a !== void 0 ? _a : 'when-hidden'
        });
        void this.ready.then(() => {
            void this._pollSpecs.start();
        });
    }
    /**
     * Test whether the manager is ready.
     */
    get isReady() {
        return this._isReady;
    }
    /**
     * A promise that fulfills when the manager is ready.
     */
    get ready() {
        return this._ready;
    }
    /**
     * Get the most recently fetched kernel specs.
     */
    get specs() {
        return this._specs;
    }
    /**
     * A signal emitted when the specs change.
     */
    get specsChanged() {
        return this._specsChanged;
    }
    /**
     * A signal emitted when there is a connection failure.
     */
    get connectionFailure() {
        return this._connectionFailure;
    }
    /**
     * Dispose of the resources used by the manager.
     */
    dispose() {
        this._pollSpecs.dispose();
        super.dispose();
    }
    /**
     * Force a refresh of the specs from the server.
     *
     * @returns A promise that resolves when the specs are fetched.
     *
     * #### Notes
     * This is intended to be called only in response to a user action,
     * since the manager maintains its internal state.
     */
    async refreshSpecs() {
        await this._pollSpecs.refresh();
        await this._pollSpecs.tick;
    }
    /**
     * Execute a request to the server to poll specs and update state.
     */
    async requestSpecs() {
        const specs = await restapi.getSpecs(this.serverSettings);
        if (this.isDisposed) {
            return;
        }
        if (!coreutils_1.JSONExt.deepEqual(specs, this._specs)) {
            this._specs = specs;
            this._specsChanged.emit(specs);
        }
    }
}
exports.KernelSpecManager = KernelSpecManager;
//# sourceMappingURL=manager.js.map

/***/ }),

/***/ 6492:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.getSpecs = void 0;
const serverconnection_1 = __webpack_require__(2920);
const validate_1 = __webpack_require__(2598);
const coreutils_1 = __webpack_require__(8925);
/**
 * The url for the kernelspec service.
 */
const KERNELSPEC_SERVICE_URL = 'api/kernelspecs';
/**
 * Fetch all of the kernel specs.
 *
 * @param settings - The optional server settings.
 * @param useCache - Whether to use the cache. If false, always request.
 *
 * @returns A promise that resolves with the kernel specs.
 *
 * #### Notes
 * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/kernelspecs).
 */
async function getSpecs(settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = coreutils_1.URLExt.join(settings.baseUrl, KERNELSPEC_SERVICE_URL);
    const response = await serverconnection_1.ServerConnection.makeRequest(url, {}, settings);
    if (response.status !== 200) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    return (0, validate_1.validateSpecModels)(data);
}
exports.getSpecs = getSpecs;
//# sourceMappingURL=restapi.js.map

/***/ }),

/***/ 2598:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.validateSpecModels = exports.validateSpecModel = void 0;
const validate_1 = __webpack_require__(7441);
/**
 * Validate a server kernelspec model to a client side model.
 */
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
function validateSpecModel(data) {
    const spec = data.spec;
    if (!spec) {
        throw new Error('Invalid kernel spec');
    }
    (0, validate_1.validateProperty)(data, 'name', 'string');
    (0, validate_1.validateProperty)(data, 'resources', 'object');
    (0, validate_1.validateProperty)(spec, 'language', 'string');
    (0, validate_1.validateProperty)(spec, 'display_name', 'string');
    (0, validate_1.validateProperty)(spec, 'argv', 'array');
    let metadata = null;
    if (spec.hasOwnProperty('metadata')) {
        (0, validate_1.validateProperty)(spec, 'metadata', 'object');
        metadata = spec.metadata;
    }
    let env = null;
    if (spec.hasOwnProperty('env')) {
        (0, validate_1.validateProperty)(spec, 'env', 'object');
        env = spec.env;
    }
    return {
        name: data.name,
        resources: data.resources,
        language: spec.language,
        display_name: spec.display_name,
        argv: spec.argv,
        metadata,
        env
    };
}
exports.validateSpecModel = validateSpecModel;
/**
 * Validate a `Kernel.ISpecModels` object.
 */
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
function validateSpecModels(data) {
    if (!data.hasOwnProperty('kernelspecs')) {
        throw new Error('No kernelspecs found');
    }
    let keys = Object.keys(data.kernelspecs);
    const kernelspecs = Object.create(null);
    let defaultSpec = data.default;
    for (let i = 0; i < keys.length; i++) {
        const ks = data.kernelspecs[keys[i]];
        try {
            kernelspecs[keys[i]] = validateSpecModel(ks);
        }
        catch (err) {
            // Remove the errant kernel spec.
            console.warn(`Removing errant kernel spec: ${keys[i]}`);
        }
    }
    keys = Object.keys(kernelspecs);
    if (!keys.length) {
        throw new Error('No valid kernelspecs found');
    }
    if (!defaultSpec ||
        typeof defaultSpec !== 'string' ||
        !(defaultSpec in kernelspecs)) {
        defaultSpec = keys[0];
        console.warn(`Default kernel not found, using '${keys[0]}'`);
    }
    return {
        default: defaultSpec,
        kernelspecs
    };
}
exports.validateSpecModels = validateSpecModels;
//# sourceMappingURL=validate.js.map

/***/ }),

/***/ 9740:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.ServiceManager = void 0;
const signaling_1 = __webpack_require__(3992);
const builder_1 = __webpack_require__(4219);
const contents_1 = __webpack_require__(8790);
const event_1 = __webpack_require__(9480);
const kernel_1 = __webpack_require__(973);
const kernelspec_1 = __webpack_require__(2946);
const nbconvert_1 = __webpack_require__(8683);
const serverconnection_1 = __webpack_require__(2920);
const session_1 = __webpack_require__(7668);
const setting_1 = __webpack_require__(7780);
const terminal_1 = __webpack_require__(9040);
const user_1 = __webpack_require__(9191);
const workspace_1 = __webpack_require__(8053);
/**
 * A Jupyter services manager.
 */
class ServiceManager {
    /**
     * Construct a new services provider.
     */
    constructor(options = {}) {
        var _a, _b;
        this._isDisposed = false;
        this._connectionFailure = new signaling_1.Signal(this);
        this._isReady = false;
        const defaultDrive = options.defaultDrive;
        const serverSettings = (_a = options.serverSettings) !== null && _a !== void 0 ? _a : serverconnection_1.ServerConnection.makeSettings();
        const standby = (_b = options.standby) !== null && _b !== void 0 ? _b : 'when-hidden';
        const normalized = { defaultDrive, serverSettings, standby };
        this.serverSettings = serverSettings;
        this.contents = options.contents || new contents_1.ContentsManager(normalized);
        this.events = options.events || new event_1.EventManager(normalized);
        this.kernels = options.kernels || new kernel_1.KernelManager(normalized);
        this.sessions =
            options.sessions ||
                new session_1.SessionManager({
                    ...normalized,
                    kernelManager: this.kernels
                });
        this.settings = options.settings || new setting_1.SettingManager(normalized);
        this.terminals = options.terminals || new terminal_1.TerminalManager(normalized);
        this.builder = options.builder || new builder_1.BuildManager(normalized);
        this.workspaces = options.workspaces || new workspace_1.WorkspaceManager(normalized);
        this.nbconvert = options.nbconvert || new nbconvert_1.NbConvertManager(normalized);
        this.kernelspecs = options.kernelspecs || new kernelspec_1.KernelSpecManager(normalized);
        this.user = options.user || new user_1.UserManager(normalized);
        // Proxy all connection failures from the individual service managers.
        this.kernelspecs.connectionFailure.connect(this._onConnectionFailure, this);
        this.sessions.connectionFailure.connect(this._onConnectionFailure, this);
        this.terminals.connectionFailure.connect(this._onConnectionFailure, this);
        // Define promises that need to be resolved before service manager is ready.
        const readyList = [this.sessions.ready, this.kernelspecs.ready];
        if (this.terminals.isAvailable()) {
            readyList.push(this.terminals.ready);
        }
        this._readyPromise = Promise.all(readyList).then(() => {
            this._isReady = true;
        });
    }
    /**
     * A signal emitted when there is a connection failure with the kernel.
     */
    get connectionFailure() {
        return this._connectionFailure;
    }
    /**
     * Test whether the service manager is disposed.
     */
    get isDisposed() {
        return this._isDisposed;
    }
    /**
     * Dispose of the resources used by the manager.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._isDisposed = true;
        signaling_1.Signal.clearData(this);
        this.contents.dispose();
        this.events.dispose();
        this.sessions.dispose();
        this.terminals.dispose();
    }
    /**
     * Test whether the manager is ready.
     */
    get isReady() {
        return this._isReady;
    }
    /**
     * A promise that fulfills when the manager is ready.
     */
    get ready() {
        return this._readyPromise;
    }
    _onConnectionFailure(sender, err) {
        this._connectionFailure.emit(err);
    }
}
exports.ServiceManager = ServiceManager;
//# sourceMappingURL=manager.js.map

/***/ }),

/***/ 8683:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.NbConvertManager = void 0;
const coreutils_1 = __webpack_require__(8925);
const serverconnection_1 = __webpack_require__(2920);
const coreutils_2 = __webpack_require__(5764);
/**
 * The url for the lab nbconvert service.
 */
const NBCONVERT_SETTINGS_URL = 'api/nbconvert';
/**
 * The nbconvert API service manager.
 */
class NbConvertManager {
    /**
     * Create a new nbconvert manager.
     */
    constructor(options = {}) {
        var _a;
        this._exportFormats = null;
        this.serverSettings =
            (_a = options.serverSettings) !== null && _a !== void 0 ? _a : serverconnection_1.ServerConnection.makeSettings();
    }
    /**
     * Fetch and cache the export formats from the expensive nbconvert handler.
     */
    async fetchExportFormats() {
        this._requestingFormats = new coreutils_2.PromiseDelegate();
        this._exportFormats = null;
        const base = this.serverSettings.baseUrl;
        const url = coreutils_1.URLExt.join(base, NBCONVERT_SETTINGS_URL);
        const { serverSettings } = this;
        const response = await serverconnection_1.ServerConnection.makeRequest(url, {}, serverSettings);
        if (response.status !== 200) {
            const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
            throw err;
        }
        const data = await response.json();
        const exportList = {};
        const keys = Object.keys(data);
        keys.forEach(function (key) {
            const mimeType = data[key].output_mimetype;
            exportList[key] = { output_mimetype: mimeType };
        });
        this._exportFormats = exportList;
        this._requestingFormats.resolve(exportList);
        return exportList;
    }
    /**
     * Get the list of export formats, preferring pre-cached ones.
     */
    async getExportFormats(force = true) {
        if (this._requestingFormats) {
            return this._requestingFormats.promise;
        }
        if (force || !this._exportFormats) {
            return await this.fetchExportFormats();
        }
        return this._exportFormats;
    }
}
exports.NbConvertManager = NbConvertManager;
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 2920:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.ServerConnection = void 0;
const coreutils_1 = __webpack_require__(8925);
const serialize_1 = __webpack_require__(7179);
let WEBSOCKET;
if (typeof window === 'undefined') {
    // Mangle the require statements so it does not get picked up in the
    // browser assets.
    WEBSOCKET = __webpack_require__(7251);
}
else {
    WEBSOCKET = WebSocket;
}
/**
 * The namespace for ServerConnection functions.
 *
 * #### Notes
 * This is only intended to manage communication with the Jupyter server.
 *
 * The default values can be used in a JupyterLab or Jupyter Notebook context.
 *
 * We use `token` authentication if available, falling back on an XSRF
 * cookie if one has been provided on the `document`.
 *
 * A content type of `'application/json'` is added when using authentication
 * and there is no body data to allow the server to prevent malicious forms.
 */
var ServerConnection;
(function (ServerConnection) {
    /**
     * Create a settings object given a subset of options.
     *
     * @param options - An optional partial set of options.
     *
     * @returns The full settings object.
     */
    function makeSettings(options) {
        return Private.makeSettings(options);
    }
    ServerConnection.makeSettings = makeSettings;
    /**
     * Make an request to the notebook server.
     *
     * @param url - The url for the request.
     *
     * @param init - The initialization options for the request.
     *
     * @param settings - The server settings to apply to the request.
     *
     * @returns a Promise that resolves with the response.
     *
     * @throws If the url of the request is not a notebook server url.
     *
     * #### Notes
     * The `url` must start with `settings.baseUrl`.  The `init` settings are
     * merged with `settings.init`, with `init` taking precedence.
     * The headers in the two objects are not merged.
     * If there is no body data, we set the content type to `application/json`
     * because it is required by the Notebook server.
     */
    function makeRequest(url, init, settings) {
        return Private.handleRequest(url, init, settings);
    }
    ServerConnection.makeRequest = makeRequest;
    /**
     * A wrapped error for a fetch response.
     */
    class ResponseError extends Error {
        /**
         * Create a ResponseError from a response, handling the traceback and message
         * as appropriate.
         *
         * @param response The response object.
         *
         * @returns A promise that resolves with a `ResponseError` object.
         */
        static async create(response) {
            try {
                const data = await response.json();
                const { message, traceback } = data;
                if (traceback) {
                    console.error(traceback);
                }
                return new ResponseError(response, message !== null && message !== void 0 ? message : ResponseError._defaultMessage(response), traceback !== null && traceback !== void 0 ? traceback : '');
            }
            catch (e) {
                console.debug(e);
                return new ResponseError(response);
            }
        }
        /**
         * Create a new response error.
         */
        constructor(response, message = ResponseError._defaultMessage(response), traceback = '') {
            super(message);
            this.response = response;
            this.traceback = traceback;
        }
        static _defaultMessage(response) {
            return `Invalid response: ${response.status} ${response.statusText}`;
        }
    }
    ServerConnection.ResponseError = ResponseError;
    /**
     * A wrapped error for a network error.
     */
    class NetworkError extends TypeError {
        /**
         * Create a new network error.
         */
        constructor(original) {
            super(original.message);
            this.stack = original.stack;
        }
    }
    ServerConnection.NetworkError = NetworkError;
})(ServerConnection || (exports.ServerConnection = ServerConnection = {}));
/**
 * The namespace for module private data.
 */
var Private;
(function (Private) {
    /**
     * Handle the server connection settings, returning a new value.
     */
    function makeSettings(options = {}) {
        var _a;
        const pageBaseUrl = coreutils_1.PageConfig.getBaseUrl();
        const pageWsUrl = coreutils_1.PageConfig.getWsUrl();
        const baseUrl = coreutils_1.URLExt.normalize(options.baseUrl) || pageBaseUrl;
        let wsUrl = options.wsUrl;
        // Prefer the default wsUrl if we are using the default baseUrl.
        if (!wsUrl && baseUrl === pageBaseUrl) {
            wsUrl = pageWsUrl;
        }
        // Otherwise convert the baseUrl to a wsUrl if possible.
        if (!wsUrl && baseUrl.indexOf('http') === 0) {
            wsUrl = 'ws' + baseUrl.slice(4);
        }
        // Otherwise fall back on the default wsUrl.
        wsUrl = wsUrl !== null && wsUrl !== void 0 ? wsUrl : pageWsUrl;
        const appendTokenConfig = coreutils_1.PageConfig.getOption('appendToken').toLowerCase();
        let appendToken;
        if (appendTokenConfig === '') {
            appendToken =
                typeof window === 'undefined' ||
                    (typeof process !== 'undefined' &&
                        ((_a = process === null || process === void 0 ? void 0 : process.env) === null || _a === void 0 ? void 0 : _a.JEST_WORKER_ID) !== undefined) ||
                    coreutils_1.URLExt.getHostName(pageBaseUrl) !== coreutils_1.URLExt.getHostName(wsUrl);
        }
        else {
            appendToken = appendTokenConfig === 'true';
        }
        return {
            init: { cache: 'no-store', credentials: 'same-origin' },
            fetch,
            Headers,
            Request,
            WebSocket: WEBSOCKET,
            token: coreutils_1.PageConfig.getToken(),
            appUrl: coreutils_1.PageConfig.getOption('appUrl'),
            appendToken,
            serializer: { serialize: serialize_1.serialize, deserialize: serialize_1.deserialize },
            ...options,
            baseUrl,
            wsUrl
        };
    }
    Private.makeSettings = makeSettings;
    /**
     * Handle a request.
     *
     * @param url - The url for the request.
     *
     * @param init - The overrides for the request init.
     *
     * @param settings - The settings object for the request.
     *
     * #### Notes
     * The `url` must start with `settings.baseUrl`.  The `init` settings
     * take precedence over `settings.init`.
     */
    function handleRequest(url, init, settings) {
        var _a;
        // Handle notebook server requests.
        if (url.indexOf(settings.baseUrl) !== 0) {
            throw new Error('Can only be used for notebook server requests');
        }
        // Use explicit cache buster when `no-store` is set since
        // not all browsers use it properly.
        const cache = (_a = init.cache) !== null && _a !== void 0 ? _a : settings.init.cache;
        if (cache === 'no-store') {
            // https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest#Bypassing_the_cache
            url += (/\?/.test(url) ? '&' : '?') + new Date().getTime();
        }
        const request = new settings.Request(url, { ...settings.init, ...init });
        // Handle authentication. Authentication can be overdetermined by
        // settings token and XSRF token.
        let authenticated = false;
        if (settings.token) {
            authenticated = true;
            request.headers.append('Authorization', `token ${settings.token}`);
        }
        if (typeof document !== 'undefined') {
            const xsrfToken = getCookie('_xsrf');
            if (xsrfToken !== undefined) {
                authenticated = true;
                request.headers.append('X-XSRFToken', xsrfToken);
            }
        }
        // Set the content type if there is no given data and we are
        // using an authenticated connection.
        if (!request.headers.has('Content-Type') && authenticated) {
            request.headers.set('Content-Type', 'application/json');
        }
        // Use `call` to avoid a `TypeError` in the browser.
        return settings.fetch.call(null, request).catch((e) => {
            // Convert the TypeError into a more specific error.
            throw new ServerConnection.NetworkError(e);
        });
        // TODO: *this* is probably where we need a system-wide connectionFailure
        // signal we can hook into.
    }
    Private.handleRequest = handleRequest;
    /**
     * Get a cookie from the document.
     */
    function getCookie(name) {
        // From http://www.tornadoweb.org/en/stable/guide/security.html
        let cookie = '';
        try {
            cookie = document.cookie;
        }
        catch (e) {
            // e.g. SecurityError in case of CSP Sandbox
            return;
        }
        const matches = cookie.match('\\b' + name + '=([^;]*)\\b');
        return matches === null || matches === void 0 ? void 0 : matches[1];
    }
})(Private || (Private = {}));
//# sourceMappingURL=serverconnection.js.map

/***/ }),

/***/ 5341:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.SessionConnection = void 0;
const signaling_1 = __webpack_require__(3992);
const __1 = __webpack_require__(7883);
const restapi_1 = __webpack_require__(7570);
const coreutils_1 = __webpack_require__(5764);
/**
 * Session object for accessing the session REST api. The session
 * should be used to start kernels and then shut them down -- for
 * all other kernel operations, the kernel object should be used.
 */
class SessionConnection {
    /**
     * Construct a new session.
     */
    constructor(options) {
        var _a, _b, _c, _d;
        this._id = '';
        this._path = '';
        this._name = '';
        this._type = '';
        this._kernel = null;
        this._isDisposed = false;
        this._disposed = new signaling_1.Signal(this);
        this._kernelChanged = new signaling_1.Signal(this);
        this._statusChanged = new signaling_1.Signal(this);
        this._connectionStatusChanged = new signaling_1.Signal(this);
        this._pendingInput = new signaling_1.Signal(this);
        this._iopubMessage = new signaling_1.Signal(this);
        this._unhandledMessage = new signaling_1.Signal(this);
        this._anyMessage = new signaling_1.Signal(this);
        this._propertyChanged = new signaling_1.Signal(this);
        this._id = options.model.id;
        this._name = options.model.name;
        this._path = options.model.path;
        this._type = options.model.type;
        this._username = (_a = options.username) !== null && _a !== void 0 ? _a : '';
        this._clientId = (_b = options.clientId) !== null && _b !== void 0 ? _b : coreutils_1.UUID.uuid4();
        this._connectToKernel = options.connectToKernel;
        this._kernelConnectionOptions = (_c = options.kernelConnectionOptions) !== null && _c !== void 0 ? _c : {};
        this.serverSettings =
            (_d = options.serverSettings) !== null && _d !== void 0 ? _d : __1.ServerConnection.makeSettings();
        this.setupKernel(options.model.kernel);
    }
    /**
     * A signal emitted when the session is disposed.
     */
    get disposed() {
        return this._disposed;
    }
    /**
     * A signal emitted when the kernel changes.
     */
    get kernelChanged() {
        return this._kernelChanged;
    }
    /**
     * A signal proxied from the connection about the kernel status.
     */
    get statusChanged() {
        return this._statusChanged;
    }
    /**
     * A signal proxied from the kernel about the connection status.
     */
    get connectionStatusChanged() {
        return this._connectionStatusChanged;
    }
    /**
     * A signal proxied from the kernel pending input.
     */
    get pendingInput() {
        return this._pendingInput;
    }
    /**
     * A signal proxied from the kernel about iopub kernel messages.
     */
    get iopubMessage() {
        return this._iopubMessage;
    }
    /**
     * A signal proxied from the kernel for an unhandled kernel message.
     */
    get unhandledMessage() {
        return this._unhandledMessage;
    }
    /**
     * A signal proxied from the kernel emitted for any kernel message.
     *
     * #### Notes
     * The behavior is undefined if the message is modified during message
     * handling. As such, it should be treated as read-only.
     */
    get anyMessage() {
        return this._anyMessage;
    }
    /**
     * A signal emitted when a session property changes.
     */
    get propertyChanged() {
        return this._propertyChanged;
    }
    /**
     * Get the session id.
     */
    get id() {
        return this._id;
    }
    /**
     * Get the session kernel connection object.
     *
     * #### Notes
     * This is a read-only property, and can be altered by [changeKernel].
     */
    get kernel() {
        return this._kernel;
    }
    /**
     * Get the session path.
     */
    get path() {
        return this._path;
    }
    /**
     * Get the session type.
     */
    get type() {
        return this._type;
    }
    /**
     * Get the session name.
     */
    get name() {
        return this._name;
    }
    /**
     * Get the model associated with the session.
     */
    get model() {
        return {
            id: this.id,
            kernel: this.kernel && { id: this.kernel.id, name: this.kernel.name },
            path: this._path,
            type: this._type,
            name: this._name
        };
    }
    /**
     * Test whether the session has been disposed.
     */
    get isDisposed() {
        return this._isDisposed;
    }
    /**
     * Update the session based on a session model from the server.
     *
     * #### Notes
     * This only updates this session connection instance. Use `setPath`,
     * `setName`, `setType`, and `changeKernel` to change the session values on
     * the server.
     */
    update(model) {
        const oldModel = this.model;
        this._path = model.path;
        this._name = model.name;
        this._type = model.type;
        if ((this._kernel === null && model.kernel !== null) ||
            (this._kernel !== null && model.kernel === null) ||
            (this._kernel !== null &&
                model.kernel !== null &&
                this._kernel.id !== model.kernel.id)) {
            if (this._kernel !== null) {
                this._kernel.dispose();
            }
            const oldValue = this._kernel || null;
            this.setupKernel(model.kernel);
            const newValue = this._kernel || null;
            this._kernelChanged.emit({ name: 'kernel', oldValue, newValue });
        }
        this._handleModelChange(oldModel);
    }
    /**
     * Dispose of the resources held by the session.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._isDisposed = true;
        this._disposed.emit();
        if (this._kernel) {
            this._kernel.dispose();
            const oldValue = this._kernel;
            this._kernel = null;
            const newValue = this._kernel;
            this._kernelChanged.emit({ name: 'kernel', oldValue, newValue });
        }
        signaling_1.Signal.clearData(this);
    }
    /**
     * Change the session path.
     *
     * @param path - The new session path.
     *
     * @returns A promise that resolves when the session has renamed.
     *
     * #### Notes
     * This uses the Jupyter REST API, and the response is validated.
     * The promise is fulfilled on a valid response and rejected otherwise.
     */
    async setPath(path) {
        if (this.isDisposed) {
            throw new Error('Session is disposed');
        }
        await this._patch({ path });
    }
    /**
     * Change the session name.
     */
    async setName(name) {
        if (this.isDisposed) {
            throw new Error('Session is disposed');
        }
        await this._patch({ name });
    }
    /**
     * Change the session type.
     */
    async setType(type) {
        if (this.isDisposed) {
            throw new Error('Session is disposed');
        }
        await this._patch({ type });
    }
    /**
     * Change the kernel.
     *
     * @param options - The name or id of the new kernel.
     *
     * #### Notes
     * This shuts down the existing kernel and creates a new kernel,
     * keeping the existing session ID and session path.
     */
    async changeKernel(options) {
        if (this.isDisposed) {
            throw new Error('Session is disposed');
        }
        await this._patch({ kernel: options });
        return this.kernel;
    }
    /**
     * Kill the kernel and shutdown the session.
     *
     * @returns - The promise fulfilled on a valid response from the server.
     *
     * #### Notes
     * Uses the [Jupyter Server API](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/jupyter-server/jupyter_server/main/jupyter_server/services/api/api.yaml#!/sessions), and validates the response.
     * Disposes of the session and emits a [sessionDied] signal on success.
     */
    async shutdown() {
        if (this.isDisposed) {
            throw new Error('Session is disposed');
        }
        await (0, restapi_1.shutdownSession)(this.id, this.serverSettings);
        this.dispose();
    }
    /**
     * Create a new kernel connection and connect to its signals.
     *
     * #### Notes
     * This method is not meant to be subclassed.
     */
    setupKernel(model) {
        if (model === null) {
            this._kernel = null;
            return;
        }
        const kc = this._connectToKernel({
            ...this._kernelConnectionOptions,
            model,
            username: this._username,
            clientId: this._clientId,
            serverSettings: this.serverSettings
        });
        this._kernel = kc;
        kc.statusChanged.connect(this.onKernelStatus, this);
        kc.connectionStatusChanged.connect(this.onKernelConnectionStatus, this);
        kc.pendingInput.connect(this.onPendingInput, this);
        kc.unhandledMessage.connect(this.onUnhandledMessage, this);
        kc.iopubMessage.connect(this.onIOPubMessage, this);
        kc.anyMessage.connect(this.onAnyMessage, this);
    }
    /**
     * Handle to changes in the Kernel status.
     */
    onKernelStatus(sender, state) {
        this._statusChanged.emit(state);
    }
    /**
     * Handle to changes in the Kernel status.
     */
    onKernelConnectionStatus(sender, state) {
        this._connectionStatusChanged.emit(state);
    }
    /**
     * Handle a change in the pendingInput.
     */
    onPendingInput(sender, state) {
        this._pendingInput.emit(state);
    }
    /**
     * Handle iopub kernel messages.
     */
    onIOPubMessage(sender, msg) {
        this._iopubMessage.emit(msg);
    }
    /**
     * Handle unhandled kernel messages.
     */
    onUnhandledMessage(sender, msg) {
        this._unhandledMessage.emit(msg);
    }
    /**
     * Handle any kernel messages.
     */
    onAnyMessage(sender, args) {
        this._anyMessage.emit(args);
    }
    /**
     * Send a PATCH to the server, updating the session path or the kernel.
     */
    async _patch(body) {
        const model = await (0, restapi_1.updateSession)({ ...body, id: this._id }, this.serverSettings);
        this.update(model);
        return model;
    }
    /**
     * Handle a change to the model.
     */
    _handleModelChange(oldModel) {
        if (oldModel.name !== this._name) {
            this._propertyChanged.emit('name');
        }
        if (oldModel.type !== this._type) {
            this._propertyChanged.emit('type');
        }
        if (oldModel.path !== this._path) {
            this._propertyChanged.emit('path');
        }
    }
}
exports.SessionConnection = SessionConnection;
//# sourceMappingURL=default.js.map

/***/ }),

/***/ 7668:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
var __exportStar = (this && this.__exportStar) || function(m, exports) {
    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.SessionAPI = exports.Session = void 0;
const Session = __importStar(__webpack_require__(7240));
exports.Session = Session;
const SessionAPI = __importStar(__webpack_require__(7570));
exports.SessionAPI = SessionAPI;
__exportStar(__webpack_require__(6919), exports);
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 6919:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.SessionManager = void 0;
const polling_1 = __webpack_require__(6049);
const signaling_1 = __webpack_require__(3992);
const serverconnection_1 = __webpack_require__(2920);
const basemanager_1 = __webpack_require__(3867);
const default_1 = __webpack_require__(5341);
const restapi_1 = __webpack_require__(7570);
/**
 * An implementation of a session manager.
 */
class SessionManager extends basemanager_1.BaseManager {
    /**
     * Construct a new session manager.
     *
     * @param options - The default options for each session.
     */
    constructor(options) {
        var _a;
        super(options);
        this._isReady = false;
        this._sessionConnections = new Set();
        this._models = new Map();
        this._runningChanged = new signaling_1.Signal(this);
        this._connectionFailure = new signaling_1.Signal(this);
        // We define these here so they bind `this` correctly
        this._connectToKernel = (options) => {
            return this._kernelManager.connectTo(options);
        };
        this._kernelManager = options.kernelManager;
        // Start model polling with exponential backoff.
        this._pollModels = new polling_1.Poll({
            auto: false,
            factory: () => this.requestRunning(),
            frequency: {
                interval: 10 * 1000,
                backoff: true,
                max: 300 * 1000
            },
            name: `@jupyterlab/services:SessionManager#models`,
            standby: (_a = options.standby) !== null && _a !== void 0 ? _a : 'when-hidden'
        });
        // Initialize internal data.
        this._ready = (async () => {
            await this._pollModels.start();
            await this._pollModels.tick;
            if (this._kernelManager.isActive) {
                await this._kernelManager.ready;
            }
            this._isReady = true;
        })();
    }
    /**
     * Test whether the manager is ready.
     */
    get isReady() {
        return this._isReady;
    }
    /**
     * A promise that fulfills when the manager is ready.
     */
    get ready() {
        return this._ready;
    }
    /**
     * A signal emitted when the running sessions change.
     */
    get runningChanged() {
        return this._runningChanged;
    }
    /**
     * A signal emitted when there is a connection failure.
     */
    get connectionFailure() {
        return this._connectionFailure;
    }
    /**
     * Dispose of the resources used by the manager.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._models.clear();
        this._sessionConnections.forEach(x => x.dispose());
        this._pollModels.dispose();
        super.dispose();
    }
    /*
     * Connect to a running session.  See also [[connectToSession]].
     */
    connectTo(options) {
        const sessionConnection = new default_1.SessionConnection({
            ...options,
            connectToKernel: this._connectToKernel,
            serverSettings: this.serverSettings
        });
        this._onStarted(sessionConnection);
        if (!this._models.has(options.model.id)) {
            // We trust the user to connect to an existing session, but we verify
            // asynchronously.
            void this.refreshRunning().catch(() => {
                /* no-op */
            });
        }
        return sessionConnection;
    }
    /**
     * Create an iterator over the most recent running sessions.
     *
     * @returns A new iterator over the running sessions.
     */
    running() {
        return this._models.values();
    }
    /**
     * Force a refresh of the running sessions.
     *
     * @returns A promise that with the list of running sessions.
     *
     * #### Notes
     * This is not typically meant to be called by the user, since the
     * manager maintains its own internal state.
     */
    async refreshRunning() {
        await this._pollModels.refresh();
        await this._pollModels.tick;
    }
    /**
     * Start a new session.  See also [[startNewSession]].
     *
     * @param createOptions - Options for creating the session
     *
     * @param connectOptions - Options for connecting to the session
     */
    async startNew(createOptions, connectOptions = {}) {
        const model = await (0, restapi_1.startSession)(createOptions, this.serverSettings);
        await this.refreshRunning();
        return this.connectTo({ ...connectOptions, model });
    }
    /**
     * Shut down a session by id.
     */
    async shutdown(id) {
        await (0, restapi_1.shutdownSession)(id, this.serverSettings);
        await this.refreshRunning();
    }
    /**
     * Shut down all sessions.
     *
     * @returns A promise that resolves when all of the kernels are shut down.
     */
    async shutdownAll() {
        // Update the list of models to make sure our list is current.
        await this.refreshRunning();
        // Shut down all models.
        await Promise.all([...this._models.keys()].map(id => (0, restapi_1.shutdownSession)(id, this.serverSettings)));
        // Update the list of models to clear out our state.
        await this.refreshRunning();
    }
    /**
     * Find a session associated with a path and stop it if it is the only session
     * using that kernel.
     *
     * @param path - The path in question.
     *
     * @returns A promise that resolves when the relevant sessions are stopped.
     */
    async stopIfNeeded(path) {
        try {
            const sessions = await (0, restapi_1.listRunning)(this.serverSettings);
            const matches = sessions.filter(value => value.path === path);
            if (matches.length === 1) {
                const id = matches[0].id;
                await this.shutdown(id);
            }
        }
        catch (error) {
            /* Always succeed. */
        }
    }
    /**
     * Find a session by id.
     */
    async findById(id) {
        if (this._models.has(id)) {
            return this._models.get(id);
        }
        await this.refreshRunning();
        return this._models.get(id);
    }
    /**
     * Find a session by path.
     */
    async findByPath(path) {
        for (const m of this._models.values()) {
            if (m.path === path) {
                return m;
            }
        }
        await this.refreshRunning();
        for (const m of this._models.values()) {
            if (m.path === path) {
                return m;
            }
        }
        return undefined;
    }
    /**
     * Execute a request to the server to poll running kernels and update state.
     */
    async requestRunning() {
        var _a, _b;
        let models;
        try {
            models = await (0, restapi_1.listRunning)(this.serverSettings);
        }
        catch (err) {
            // Handle network errors, as well as cases where we are on a
            // JupyterHub and the server is not running. JupyterHub returns a
            // 503 (<2.0) or 424 (>2.0) in that case.
            if (err instanceof serverconnection_1.ServerConnection.NetworkError ||
                ((_a = err.response) === null || _a === void 0 ? void 0 : _a.status) === 503 ||
                ((_b = err.response) === null || _b === void 0 ? void 0 : _b.status) === 424) {
                this._connectionFailure.emit(err);
            }
            throw err;
        }
        if (this.isDisposed) {
            return;
        }
        if (this._models.size === models.length &&
            models.every(model => {
                var _a, _b, _c, _d;
                const existing = this._models.get(model.id);
                if (!existing) {
                    return false;
                }
                return (((_a = existing.kernel) === null || _a === void 0 ? void 0 : _a.id) === ((_b = model.kernel) === null || _b === void 0 ? void 0 : _b.id) &&
                    ((_c = existing.kernel) === null || _c === void 0 ? void 0 : _c.name) === ((_d = model.kernel) === null || _d === void 0 ? void 0 : _d.name) &&
                    existing.name === model.name &&
                    existing.path === model.path &&
                    existing.type === model.type);
            })) {
            // Identical models list (presuming models does not contain duplicate
            // ids), so just return
            return;
        }
        this._models = new Map(models.map(x => [x.id, x]));
        this._sessionConnections.forEach(sc => {
            if (this._models.has(sc.id)) {
                sc.update(this._models.get(sc.id));
            }
            else {
                sc.dispose();
            }
        });
        this._runningChanged.emit(models);
    }
    /**
     * Handle a session starting.
     */
    _onStarted(sessionConnection) {
        this._sessionConnections.add(sessionConnection);
        sessionConnection.disposed.connect(this._onDisposed, this);
        sessionConnection.propertyChanged.connect(this._onChanged, this);
        sessionConnection.kernelChanged.connect(this._onChanged, this);
    }
    _onDisposed(sessionConnection) {
        this._sessionConnections.delete(sessionConnection);
        // A session termination emission could mean the server session is deleted,
        // or that the session JS object is disposed and the session still exists on
        // the server, so we refresh from the server to make sure we reflect the
        // server state.
        void this.refreshRunning().catch(() => {
            /* no-op */
        });
    }
    _onChanged() {
        void this.refreshRunning().catch(() => {
            /* no-op */
        });
    }
}
exports.SessionManager = SessionManager;
/**
 * The namespace for `SessionManager` class statics.
 */
(function (SessionManager) {
    /**
     * A no-op session manager to be used when starting sessions is not supported.
     */
    class NoopManager extends SessionManager {
        constructor() {
            super(...arguments);
            this._readyPromise = new Promise(() => {
                /* no-op */
            });
        }
        /**
         * Whether the manager is active.
         */
        get isActive() {
            return false;
        }
        /**
         * Used for testing.
         */
        get parentReady() {
            return super.ready;
        }
        /**
         * Start a new session - throw an error since it is not supported.
         */
        async startNew(createOptions, connectOptions = {}) {
            return Promise.reject(new Error('Not implemented in no-op Session Manager'));
        }
        /*
         * Connect to a running session - throw an error since it is not supported.
         */
        connectTo(options) {
            throw Error('Not implemented in no-op Session Manager');
        }
        /**
         * A promise that fulfills when the manager is ready (never).
         */
        get ready() {
            return this.parentReady.then(() => this._readyPromise);
        }
        /**
         * Shut down a session by id - throw an error since it is not supported.
         */
        async shutdown(id) {
            return Promise.reject(new Error('Not implemented in no-op Session Manager'));
        }
        /**
         * Execute a request to the server to poll running sessions and update state.
         */
        async requestRunning() {
            return Promise.resolve();
        }
    }
    SessionManager.NoopManager = NoopManager;
})(SessionManager || (exports.SessionManager = SessionManager = {}));
//# sourceMappingURL=manager.js.map

/***/ }),

/***/ 7570:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.updateSession = exports.startSession = exports.getSessionModel = exports.shutdownSession = exports.getSessionUrl = exports.listRunning = exports.SESSION_SERVICE_URL = void 0;
const serverconnection_1 = __webpack_require__(2920);
const coreutils_1 = __webpack_require__(8925);
const validate_1 = __webpack_require__(5684);
/**
 * The url for the session service.
 */
exports.SESSION_SERVICE_URL = 'api/sessions';
/**
 * List the running sessions.
 */
async function listRunning(settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = coreutils_1.URLExt.join(settings.baseUrl, exports.SESSION_SERVICE_URL);
    const response = await serverconnection_1.ServerConnection.makeRequest(url, {}, settings);
    if (response.status !== 200) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    if (!Array.isArray(data)) {
        throw new Error('Invalid Session list');
    }
    data.forEach(m => {
        (0, validate_1.updateLegacySessionModel)(m);
        (0, validate_1.validateModel)(m);
    });
    return data;
}
exports.listRunning = listRunning;
/**
 * Get a session url.
 */
function getSessionUrl(baseUrl, id) {
    const servicesBase = coreutils_1.URLExt.join(baseUrl, exports.SESSION_SERVICE_URL);
    const result = coreutils_1.URLExt.join(servicesBase, id);
    if (!result.startsWith(servicesBase)) {
        throw new Error('Can only be used for services requests');
    }
    return result;
}
exports.getSessionUrl = getSessionUrl;
/**
 * Shut down a session by id.
 */
async function shutdownSession(id, settings = serverconnection_1.ServerConnection.makeSettings()) {
    var _a;
    const url = getSessionUrl(settings.baseUrl, id);
    const init = { method: 'DELETE' };
    const response = await serverconnection_1.ServerConnection.makeRequest(url, init, settings);
    if (response.status === 404) {
        const data = await response.json();
        const msg = (_a = data.message) !== null && _a !== void 0 ? _a : `The session "${id}"" does not exist on the server`;
        console.warn(msg);
    }
    else if (response.status === 410) {
        throw new serverconnection_1.ServerConnection.ResponseError(response, 'The kernel was deleted but the session was not');
    }
    else if (response.status !== 204) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
}
exports.shutdownSession = shutdownSession;
/**
 * Get a full session model from the server by session id string.
 */
async function getSessionModel(id, settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = getSessionUrl(settings.baseUrl, id);
    const response = await serverconnection_1.ServerConnection.makeRequest(url, {}, settings);
    if (response.status !== 200) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    (0, validate_1.updateLegacySessionModel)(data);
    (0, validate_1.validateModel)(data);
    return data;
}
exports.getSessionModel = getSessionModel;
/**
 * Create a new session, or return an existing session if the session path
 * already exists.
 */
async function startSession(options, settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = coreutils_1.URLExt.join(settings.baseUrl, exports.SESSION_SERVICE_URL);
    const init = {
        method: 'POST',
        body: JSON.stringify(options)
    };
    const response = await serverconnection_1.ServerConnection.makeRequest(url, init, settings);
    if (response.status !== 201) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    (0, validate_1.updateLegacySessionModel)(data);
    (0, validate_1.validateModel)(data);
    return data;
}
exports.startSession = startSession;
/**
 * Send a PATCH to the server, updating the session path or the kernel.
 */
async function updateSession(model, settings = serverconnection_1.ServerConnection.makeSettings()) {
    const url = getSessionUrl(settings.baseUrl, model.id);
    const init = {
        method: 'PATCH',
        body: JSON.stringify(model)
    };
    const response = await serverconnection_1.ServerConnection.makeRequest(url, init, settings);
    if (response.status !== 200) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    (0, validate_1.updateLegacySessionModel)(data);
    (0, validate_1.validateModel)(data);
    return data;
}
exports.updateSession = updateSession;
//# sourceMappingURL=restapi.js.map

/***/ }),

/***/ 7240:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
//# sourceMappingURL=session.js.map

/***/ }),

/***/ 5684:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.validateModels = exports.updateLegacySessionModel = exports.validateModel = void 0;
const validate_1 = __webpack_require__(5855);
const validate_2 = __webpack_require__(7441);
/**
 * Validate an `Session.IModel` object.
 */
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
function validateModel(data) {
    (0, validate_2.validateProperty)(data, 'id', 'string');
    (0, validate_2.validateProperty)(data, 'type', 'string');
    (0, validate_2.validateProperty)(data, 'name', 'string');
    (0, validate_2.validateProperty)(data, 'path', 'string');
    (0, validate_2.validateProperty)(data, 'kernel', 'object');
    (0, validate_1.validateModel)(data.kernel);
}
exports.validateModel = validateModel;
/**
 * Update model from legacy session data.
 */
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
function updateLegacySessionModel(data) {
    if (data.path === undefined && data.notebook !== undefined) {
        data.path = data.notebook.path;
        data.type = 'notebook';
        data.name = '';
    }
}
exports.updateLegacySessionModel = updateLegacySessionModel;
/**
 * Validate an array of `Session.IModel` objects.
 */
function validateModels(models) {
    if (!Array.isArray(models)) {
        throw new Error('Invalid session list');
    }
    models.forEach(d => validateModel(d));
}
exports.validateModels = validateModels;
//# sourceMappingURL=validate.js.map

/***/ }),

/***/ 7780:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.SettingManager = void 0;
const coreutils_1 = __webpack_require__(8925);
const statedb_1 = __webpack_require__(1670);
const serverconnection_1 = __webpack_require__(2920);
/**
 * The url for the lab settings service.
 */
const SERVICE_SETTINGS_URL = 'api/settings';
/**
 * The settings API service manager.
 */
class SettingManager extends statedb_1.DataConnector {
    /**
     * Create a new setting manager.
     */
    constructor(options = {}) {
        var _a;
        super();
        this.serverSettings =
            (_a = options.serverSettings) !== null && _a !== void 0 ? _a : serverconnection_1.ServerConnection.makeSettings();
    }
    /**
     * Fetch a plugin's settings.
     *
     * @param id - The plugin's ID.
     *
     * @returns A promise that resolves if successful.
     */
    async fetch(id) {
        if (!id) {
            throw new Error('Plugin `id` parameter is required for settings fetch.');
        }
        const { serverSettings } = this;
        const { baseUrl, appUrl } = serverSettings;
        const { makeRequest, ResponseError } = serverconnection_1.ServerConnection;
        const base = baseUrl + appUrl;
        const url = Private.url(base, id);
        const response = await makeRequest(url, {}, serverSettings);
        if (response.status !== 200) {
            const err = await ResponseError.create(response);
            throw err;
        }
        // Assert what type the server response is returning.
        return response.json();
    }
    /**
     * Fetch the list of all plugin setting bundles.
     *
     * @returns A promise that resolves if successful.
     */
    async list(query) {
        var _a, _b, _c, _d;
        const { serverSettings } = this;
        const { baseUrl, appUrl } = serverSettings;
        const { makeRequest, ResponseError } = serverconnection_1.ServerConnection;
        const base = baseUrl + appUrl;
        const url = Private.url(base, '', query === 'ids');
        const response = await makeRequest(url, {}, serverSettings);
        if (response.status !== 200) {
            throw new ResponseError(response);
        }
        const json = await response.json();
        const ids = (_b = (_a = json === null || json === void 0 ? void 0 : json['settings']) === null || _a === void 0 ? void 0 : _a.map((plugin) => plugin.id)) !== null && _b !== void 0 ? _b : [];
        let values = [];
        if (!query) {
            values =
                (_d = (_c = json === null || json === void 0 ? void 0 : json['settings']) === null || _c === void 0 ? void 0 : _c.map((plugin) => {
                    plugin.data = { composite: {}, user: {} };
                    return plugin;
                })) !== null && _d !== void 0 ? _d : [];
        }
        return { ids, values };
    }
    /**
     * Save a plugin's settings.
     *
     * @param id - The plugin's ID.
     *
     * @param raw - The user setting values as a raw string of JSON with comments.
     *
     * @returns A promise that resolves if successful.
     */
    async save(id, raw) {
        const { serverSettings } = this;
        const { baseUrl, appUrl } = serverSettings;
        const { makeRequest, ResponseError } = serverconnection_1.ServerConnection;
        const base = baseUrl + appUrl;
        const url = Private.url(base, id);
        // NOTE: 'raw' is JSON5 (not valid JSON), so we encode it as a string in a valid JSON body
        const init = { body: JSON.stringify({ raw }), method: 'PUT' };
        const response = await makeRequest(url, init, serverSettings);
        if (response.status !== 204) {
            throw new ResponseError(response);
        }
    }
}
exports.SettingManager = SettingManager;
/**
 * A namespace for private data.
 */
var Private;
(function (Private) {
    /**
     * Get the url for a plugin's settings.
     */
    function url(base, id, idsOnly) {
        const idsOnlyParam = idsOnly
            ? coreutils_1.URLExt.objectToQueryString({ ids_only: true })
            : '';
        const settingsBase = coreutils_1.URLExt.join(base, SERVICE_SETTINGS_URL);
        const result = coreutils_1.URLExt.join(settingsBase, id);
        if (!result.startsWith(settingsBase)) {
            throw new Error('Can only be used for workspaces requests');
        }
        return `${result}${idsOnlyParam}`;
    }
    Private.url = url;
})(Private || (Private = {}));
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 7251:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

/*
 * Copyright (c) Jupyter Development Team.
 * Distributed under the terms of the Modified BSD License.
 */
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports["default"] = WebSocket;
//# sourceMappingURL=ws.js.map

/***/ }),

/***/ 9822:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.TerminalConnection = void 0;
const coreutils_1 = __webpack_require__(8925);
const coreutils_2 = __webpack_require__(5764);
const signaling_1 = __webpack_require__(3992);
const __1 = __webpack_require__(7883);
const restapi_1 = __webpack_require__(6134);
/**
 * An implementation of a terminal interface.
 */
class TerminalConnection {
    /**
     * Construct a new terminal session.
     */
    constructor(options) {
        var _a;
        /**
         * Create the terminal websocket connection and add socket status handlers.
         *
         * #### Notes
         * You are responsible for updating the connection status as appropriate.
         */
        this._createSocket = () => {
            this._errorIfDisposed();
            // Make sure the socket is clear
            this._clearSocket();
            // Update the connection status to reflect opening a new connection.
            this._updateConnectionStatus('connecting');
            const name = this._name;
            const settings = this.serverSettings;
            let url = coreutils_1.URLExt.join(settings.wsUrl, 'terminals', 'websocket', encodeURIComponent(name));
            // If token authentication is in use.
            const token = settings.token;
            if (settings.appendToken && token !== '') {
                url = url + `?token=${encodeURIComponent(token)}`;
            }
            this._ws = new settings.WebSocket(url);
            this._ws.onmessage = this._onWSMessage;
            this._ws.onclose = this._onWSClose;
            this._ws.onerror = this._onWSClose;
        };
        // Websocket messages events are defined as variables to bind `this`
        this._onWSMessage = (event) => {
            if (this._isDisposed) {
                return;
            }
            const data = JSON.parse(event.data);
            // Handle a disconnect message.
            if (data[0] === 'disconnect') {
                this.dispose();
            }
            if (this._connectionStatus === 'connecting') {
                // After reconnection, ignore all messages until a 'setup' message
                // before we are truly connected. Setting the connection status to
                // connected only then means that if we do not get a setup message
                // before our retry timeout, we will delete the websocket and try again.
                if (data[0] === 'setup') {
                    this._updateConnectionStatus('connected');
                }
                return;
            }
            this._messageReceived.emit({
                type: data[0],
                content: data.slice(1)
            });
        };
        this._onWSClose = (event) => {
            console.warn(`Terminal websocket closed: ${event.code}`);
            if (!this.isDisposed) {
                this._reconnect();
            }
        };
        this._connectionStatus = 'connecting';
        this._connectionStatusChanged = new signaling_1.Signal(this);
        this._isDisposed = false;
        this._disposed = new signaling_1.Signal(this);
        this._messageReceived = new signaling_1.Signal(this);
        this._reconnectTimeout = null;
        this._ws = null;
        this._noOp = () => {
            /* no-op */
        };
        this._reconnectLimit = 7;
        this._reconnectAttempt = 0;
        this._pendingMessages = [];
        this._name = options.model.name;
        this.serverSettings =
            (_a = options.serverSettings) !== null && _a !== void 0 ? _a : __1.ServerConnection.makeSettings();
        this._createSocket();
    }
    /**
     * A signal emitted when the session is disposed.
     */
    get disposed() {
        return this._disposed;
    }
    /**
     * A signal emitted when a message is received from the server.
     */
    get messageReceived() {
        return this._messageReceived;
    }
    /**
     * Get the name of the terminal session.
     */
    get name() {
        return this._name;
    }
    /**
     * Get the model for the terminal session.
     */
    get model() {
        return { name: this._name };
    }
    /**
     * Test whether the session is disposed.
     */
    get isDisposed() {
        return this._isDisposed;
    }
    /**
     * Dispose of the resources held by the session.
     */
    dispose() {
        if (this._isDisposed) {
            return;
        }
        this._isDisposed = true;
        this._disposed.emit();
        this._updateConnectionStatus('disconnected');
        this._clearSocket();
        signaling_1.Signal.clearData(this);
    }
    /**
     * Send a message to the terminal session.
     *
     * #### Notes
     * If the connection is down, the message will be queued for sending when
     * the connection comes back up.
     */
    send(message) {
        this._sendMessage(message);
    }
    /**
     * Send a message on the websocket, or possibly queue for later sending.
     *
     * @param queue - whether to queue the message if it cannot be sent
     */
    _sendMessage(message, queue = true) {
        if (this._isDisposed || !message.content) {
            return;
        }
        if (this.connectionStatus === 'connected' && this._ws) {
            const msg = [message.type, ...message.content];
            this._ws.send(JSON.stringify(msg));
        }
        else if (queue) {
            this._pendingMessages.push(message);
        }
        else {
            throw new Error(`Could not send message: ${JSON.stringify(message)}`);
        }
    }
    /**
     * Send pending messages to the kernel.
     */
    _sendPending() {
        // We check to make sure we are still connected each time. For
        // example, if a websocket buffer overflows, it may close, so we should
        // stop sending messages.
        while (this.connectionStatus === 'connected' &&
            this._pendingMessages.length > 0) {
            this._sendMessage(this._pendingMessages[0], false);
            // We shift the message off the queue after the message is sent so that
            // if there is an exception, the message is still pending.
            this._pendingMessages.shift();
        }
    }
    /**
     * Reconnect to a terminal.
     *
     * #### Notes
     * This may try multiple times to reconnect to a terminal, and will sever
     * any existing connection.
     */
    reconnect() {
        this._errorIfDisposed();
        const result = new coreutils_2.PromiseDelegate();
        // Set up a listener for the connection status changing, which accepts or
        // rejects after the retries are done.
        const fulfill = (sender, status) => {
            if (status === 'connected') {
                result.resolve();
                this.connectionStatusChanged.disconnect(fulfill, this);
            }
            else if (status === 'disconnected') {
                result.reject(new Error('Terminal connection disconnected'));
                this.connectionStatusChanged.disconnect(fulfill, this);
            }
        };
        this.connectionStatusChanged.connect(fulfill, this);
        // Reset the reconnect limit so we start the connection attempts fresh
        this._reconnectAttempt = 0;
        // Start the reconnection process, which will also clear any existing
        // connection.
        this._reconnect();
        // Return the promise that should resolve on connection or reject if the
        // retries don't work.
        return result.promise;
    }
    /**
     * Attempt a connection if we have not exhausted connection attempts.
     */
    _reconnect() {
        this._errorIfDisposed();
        // Clear any existing reconnection attempt
        clearTimeout(this._reconnectTimeout);
        // Update the connection status and schedule a possible reconnection.
        if (this._reconnectAttempt < this._reconnectLimit) {
            this._updateConnectionStatus('connecting');
            // The first reconnect attempt should happen immediately, and subsequent
            // attempts should pick a random number in a growing range so that we
            // don't overload the server with synchronized reconnection attempts
            // across multiple kernels.
            const timeout = Private.getRandomIntInclusive(0, 1e3 * (Math.pow(2, this._reconnectAttempt) - 1));
            console.error(`Connection lost, reconnecting in ${Math.floor(timeout / 1000)} seconds.`);
            this._reconnectTimeout = setTimeout(this._createSocket, timeout);
            this._reconnectAttempt += 1;
        }
        else {
            this._updateConnectionStatus('disconnected');
        }
        // Clear the websocket event handlers and the socket itself.
        this._clearSocket();
    }
    /**
     * Forcefully clear the socket state.
     *
     * #### Notes
     * This will clear all socket state without calling any handlers and will
     * not update the connection status. If you call this method, you are
     * responsible for updating the connection status as needed and recreating
     * the socket if you plan to reconnect.
     */
    _clearSocket() {
        if (this._ws !== null) {
            // Clear the websocket event handlers and the socket itself.
            this._ws.onopen = this._noOp;
            this._ws.onclose = this._noOp;
            this._ws.onerror = this._noOp;
            this._ws.onmessage = this._noOp;
            this._ws.close();
            this._ws = null;
        }
    }
    /**
     * Shut down the terminal session.
     */
    async shutdown() {
        await (0, restapi_1.shutdownTerminal)(this.name, this.serverSettings);
        this.dispose();
    }
    /**
     * Clone the current terminal connection.
     */
    clone() {
        return new TerminalConnection(this);
    }
    /**
     * Handle connection status changes.
     */
    _updateConnectionStatus(connectionStatus) {
        if (this._connectionStatus === connectionStatus) {
            return;
        }
        this._connectionStatus = connectionStatus;
        // If we are not 'connecting', stop any reconnection attempts.
        if (connectionStatus !== 'connecting') {
            this._reconnectAttempt = 0;
            clearTimeout(this._reconnectTimeout);
        }
        // Send the pending messages if we just connected.
        if (connectionStatus === 'connected') {
            this._sendPending();
        }
        // Notify others that the connection status changed.
        this._connectionStatusChanged.emit(connectionStatus);
    }
    /**
     * Utility function to throw an error if this instance is disposed.
     */
    _errorIfDisposed() {
        if (this.isDisposed) {
            throw new Error('Terminal connection is disposed');
        }
    }
    /**
     * A signal emitted when the terminal connection status changes.
     */
    get connectionStatusChanged() {
        return this._connectionStatusChanged;
    }
    /**
     * The current connection status of the terminal connection.
     */
    get connectionStatus() {
        return this._connectionStatus;
    }
}
exports.TerminalConnection = TerminalConnection;
var Private;
(function (Private) {
    /**
     * Get the url for a terminal.
     */
    function getTermUrl(baseUrl, name) {
        return coreutils_1.URLExt.join(baseUrl, restapi_1.TERMINAL_SERVICE_URL, encodeURIComponent(name));
    }
    Private.getTermUrl = getTermUrl;
    /**
     * Get a random integer between min and max, inclusive of both.
     *
     * #### Notes
     * From
     * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random#Getting_a_random_integer_between_two_values_inclusive
     *
     * From the MDN page: It might be tempting to use Math.round() to accomplish
     * that, but doing so would cause your random numbers to follow a non-uniform
     * distribution, which may not be acceptable for your needs.
     */
    function getRandomIntInclusive(min, max) {
        min = Math.ceil(min);
        max = Math.floor(max);
        return Math.floor(Math.random() * (max - min + 1)) + min;
    }
    Private.getRandomIntInclusive = getRandomIntInclusive;
})(Private || (Private = {}));
//# sourceMappingURL=default.js.map

/***/ }),

/***/ 9040:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
var __exportStar = (this && this.__exportStar) || function(m, exports) {
    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.TerminalAPI = exports.Terminal = void 0;
const Terminal = __importStar(__webpack_require__(6994));
exports.Terminal = Terminal;
const TerminalAPI = __importStar(__webpack_require__(6134));
exports.TerminalAPI = TerminalAPI;
__exportStar(__webpack_require__(9883), exports);
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 9883:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.TerminalManager = void 0;
const polling_1 = __webpack_require__(6049);
const signaling_1 = __webpack_require__(3992);
const __1 = __webpack_require__(7883);
const basemanager_1 = __webpack_require__(3867);
const restapi_1 = __webpack_require__(6134);
const default_1 = __webpack_require__(9822);
/**
 * A terminal session manager.
 */
class TerminalManager extends basemanager_1.BaseManager {
    /**
     * Construct a new terminal manager.
     */
    constructor(options = {}) {
        var _a;
        super(options);
        this._isReady = false;
        // As an optimization, we unwrap the models to just store the names.
        this._names = [];
        this._terminalConnections = new Set();
        this._runningChanged = new signaling_1.Signal(this);
        this._connectionFailure = new signaling_1.Signal(this);
        // Check if terminals are available
        if (!this.isAvailable()) {
            this._ready = Promise.reject('Terminals unavailable');
            this._ready.catch(_ => undefined);
            return;
        }
        // Start polling with exponential backoff.
        this._pollModels = new polling_1.Poll({
            auto: false,
            factory: () => this.requestRunning(),
            frequency: {
                interval: 10 * 1000,
                backoff: true,
                max: 300 * 1000
            },
            name: `@jupyterlab/services:TerminalManager#models`,
            standby: (_a = options.standby) !== null && _a !== void 0 ? _a : 'when-hidden'
        });
        // Initialize internal data.
        this._ready = (async () => {
            await this._pollModels.start();
            await this._pollModels.tick;
            this._isReady = true;
        })();
    }
    /**
     * Test whether the manager is ready.
     */
    get isReady() {
        return this._isReady;
    }
    /**
     * A promise that fulfills when the manager is ready.
     */
    get ready() {
        return this._ready;
    }
    /**
     * A signal emitted when the running terminals change.
     */
    get runningChanged() {
        return this._runningChanged;
    }
    /**
     * A signal emitted when there is a connection failure.
     */
    get connectionFailure() {
        return this._connectionFailure;
    }
    /**
     * Dispose of the resources used by the manager.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._names.length = 0;
        this._terminalConnections.forEach(x => x.dispose());
        this._pollModels.dispose();
        super.dispose();
    }
    /**
     * Whether the terminal service is available.
     */
    isAvailable() {
        return (0, restapi_1.isAvailable)();
    }
    /*
     * Connect to a running terminal.
     *
     * @param options - The options used to connect to the terminal.
     *
     * @returns The new terminal connection instance.
     *
     * #### Notes
     * The manager `serverSettings` will be used.
     */
    connectTo(options) {
        const terminalConnection = new default_1.TerminalConnection({
            ...options,
            serverSettings: this.serverSettings
        });
        this._onStarted(terminalConnection);
        if (!this._names.includes(options.model.name)) {
            // We trust the user to connect to an existing session, but we verify
            // asynchronously.
            void this.refreshRunning().catch(() => {
                /* no-op */
            });
        }
        return terminalConnection;
    }
    /**
     * Create an iterator over the most recent running terminals.
     *
     * @returns A new iterator over the running terminals.
     */
    running() {
        return this._models[Symbol.iterator]();
    }
    /**
     * Force a refresh of the running terminals.
     *
     * @returns A promise that with the list of running terminals.
     *
     * #### Notes
     * This is intended to be called only in response to a user action,
     * since the manager maintains its internal state.
     */
    async refreshRunning() {
        await this._pollModels.refresh();
        await this._pollModels.tick;
    }
    /**
     * Create a new terminal session.
     *
     * @param options - The options used to create the terminal.
     *
     * @returns A promise that resolves with the terminal connection instance.
     *
     * #### Notes
     * The manager `serverSettings` will be used unless overridden in the
     * options.
     */
    async startNew(options) {
        const model = await (0, restapi_1.startNew)(this.serverSettings, options === null || options === void 0 ? void 0 : options.name, options === null || options === void 0 ? void 0 : options.cwd);
        await this.refreshRunning();
        return this.connectTo({ model });
    }
    /**
     * Shut down a terminal session by name.
     */
    async shutdown(name) {
        await (0, restapi_1.shutdownTerminal)(name, this.serverSettings);
        await this.refreshRunning();
    }
    /**
     * Shut down all terminal sessions.
     *
     * @returns A promise that resolves when all of the sessions are shut down.
     */
    async shutdownAll() {
        // Update the list of models to make sure our list is current.
        await this.refreshRunning();
        // Shut down all models.
        await Promise.all(this._names.map(name => (0, restapi_1.shutdownTerminal)(name, this.serverSettings)));
        // Update the list of models to clear out our state.
        await this.refreshRunning();
    }
    /**
     * Execute a request to the server to poll running terminals and update state.
     */
    async requestRunning() {
        var _a, _b;
        let models;
        try {
            models = await (0, restapi_1.listRunning)(this.serverSettings);
        }
        catch (err) {
            // Handle network errors, as well as cases where we are on a
            // JupyterHub and the server is not running. JupyterHub returns a
            // 503 (<2.0) or 424 (>2.0) in that case.
            if (err instanceof __1.ServerConnection.NetworkError ||
                ((_a = err.response) === null || _a === void 0 ? void 0 : _a.status) === 503 ||
                ((_b = err.response) === null || _b === void 0 ? void 0 : _b.status) === 424) {
                this._connectionFailure.emit(err);
            }
            throw err;
        }
        if (this.isDisposed) {
            return;
        }
        const names = models.map(({ name }) => name).sort();
        if (names === this._names) {
            // Identical models list, so just return
            return;
        }
        this._names = names;
        this._terminalConnections.forEach(tc => {
            if (!names.includes(tc.name)) {
                tc.dispose();
            }
        });
        this._runningChanged.emit(this._models);
    }
    /**
     * Handle a session starting.
     */
    _onStarted(terminalConnection) {
        this._terminalConnections.add(terminalConnection);
        terminalConnection.disposed.connect(this._onDisposed, this);
    }
    /**
     * Handle a session terminating.
     */
    _onDisposed(terminalConnection) {
        this._terminalConnections.delete(terminalConnection);
        // Update the running models to make sure we reflect the server state
        void this.refreshRunning().catch(() => {
            /* no-op */
        });
    }
    get _models() {
        return this._names.map(name => {
            return { name };
        });
    }
}
exports.TerminalManager = TerminalManager;
/**
 * The namespace for TerminalManager statics.
 */
(function (TerminalManager) {
    /**
     * A no-op terminal manager to be used when starting terminals is not supported.
     */
    class NoopManager extends TerminalManager {
        constructor() {
            super(...arguments);
            this._readyPromise = new Promise(() => {
                /* no-op */
            });
        }
        /**
         * Whether the manager is active.
         */
        get isActive() {
            return false;
        }
        /**
         * Used for testing.
         */
        get parentReady() {
            return super.ready;
        }
        /**
         * A promise that fulfills when the manager is ready (never).
         */
        get ready() {
            return this.parentReady.then(() => this._readyPromise);
        }
        /**
         * Create a new terminal session - throw an error since it is not supported.
         *
         */
        async startNew(options) {
            return Promise.reject(new Error('Not implemented in no-op Terminal Manager'));
        }
        /*
         * Connect to a running terminal - throw an error since it is not supported.
         */
        connectTo(options) {
            throw Error('Not implemented in no-op Terminal Manager');
        }
        /**
         * Shut down a session by id - throw an error since it is not supported.
         */
        async shutdown(id) {
            return Promise.reject(new Error('Not implemented in no-op Terminal Manager'));
        }
        /**
         * Execute a request to the server to poll running sessions and update state.
         */
        async requestRunning() {
            return Promise.resolve();
        }
    }
    TerminalManager.NoopManager = NoopManager;
})(TerminalManager || (exports.TerminalManager = TerminalManager = {}));
//# sourceMappingURL=manager.js.map

/***/ }),

/***/ 6134:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.shutdownTerminal = exports.listRunning = exports.startNew = exports.isAvailable = exports.TERMINAL_SERVICE_URL = void 0;
const coreutils_1 = __webpack_require__(8925);
const serverconnection_1 = __webpack_require__(2920);
/**
 * The url for the terminal service.
 */
exports.TERMINAL_SERVICE_URL = 'api/terminals';
/**
 * Whether the terminal service is available.
 */
function isAvailable() {
    const available = String(coreutils_1.PageConfig.getOption('terminalsAvailable'));
    return available.toLowerCase() === 'true';
}
exports.isAvailable = isAvailable;
/**
 * Start a new terminal session.
 *
 * @param settings - The server settings to use.
 *
 * @param name - The name of the target terminal.
 *
 * @param cwd - The path in which the terminal will start.
 *
 * @returns A promise that resolves with the session model.
 */
async function startNew(settings = serverconnection_1.ServerConnection.makeSettings(), name, cwd) {
    Private.errorIfNotAvailable();
    const url = coreutils_1.URLExt.join(settings.baseUrl, exports.TERMINAL_SERVICE_URL);
    const init = {
        method: 'POST',
        body: JSON.stringify({ name, cwd })
    };
    const response = await serverconnection_1.ServerConnection.makeRequest(url, init, settings);
    if (response.status !== 200) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    // TODO: Validate model
    return data;
}
exports.startNew = startNew;
/**
 * List the running terminal sessions.
 *
 * @param settings - The server settings to use.
 *
 * @returns A promise that resolves with the list of running session models.
 */
async function listRunning(settings = serverconnection_1.ServerConnection.makeSettings()) {
    Private.errorIfNotAvailable();
    const url = coreutils_1.URLExt.join(settings.baseUrl, exports.TERMINAL_SERVICE_URL);
    const response = await serverconnection_1.ServerConnection.makeRequest(url, {}, settings);
    if (response.status !== 200) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
    const data = await response.json();
    if (!Array.isArray(data)) {
        throw new Error('Invalid terminal list');
    }
    // TODO: validate each model
    return data;
}
exports.listRunning = listRunning;
/**
 * Shut down a terminal session by name.
 *
 * @param name - The name of the target session.
 *
 * @param settings - The server settings to use.
 *
 * @returns A promise that resolves when the session is shut down.
 */
async function shutdownTerminal(name, settings = serverconnection_1.ServerConnection.makeSettings()) {
    var _a;
    Private.errorIfNotAvailable();
    const workspacesBase = coreutils_1.URLExt.join(settings.baseUrl, exports.TERMINAL_SERVICE_URL);
    const url = coreutils_1.URLExt.join(workspacesBase, name);
    if (!url.startsWith(workspacesBase)) {
        throw new Error('Can only be used for terminal requests');
    }
    const init = { method: 'DELETE' };
    const response = await serverconnection_1.ServerConnection.makeRequest(url, init, settings);
    if (response.status === 404) {
        const data = await response.json();
        const msg = (_a = data.message) !== null && _a !== void 0 ? _a : `The terminal session "${name}"" does not exist on the server`;
        console.warn(msg);
    }
    else if (response.status !== 204) {
        const err = await serverconnection_1.ServerConnection.ResponseError.create(response);
        throw err;
    }
}
exports.shutdownTerminal = shutdownTerminal;
var Private;
(function (Private) {
    /**
     * Throw an error if terminals are not available.
     */
    function errorIfNotAvailable() {
        if (!isAvailable()) {
            throw new Error('Terminals Unavailable');
        }
    }
    Private.errorIfNotAvailable = errorIfNotAvailable;
})(Private || (Private = {}));
//# sourceMappingURL=restapi.js.map

/***/ }),

/***/ 6994:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.isAvailable = void 0;
const restapi_1 = __webpack_require__(6134);
Object.defineProperty(exports, "isAvailable", ({ enumerable: true, get: function () { return restapi_1.isAvailable; } }));
//# sourceMappingURL=terminal.js.map

/***/ }),

/***/ 9191:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.UserManager = void 0;
const coreutils_1 = __webpack_require__(8925);
const coreutils_2 = __webpack_require__(5764);
const polling_1 = __webpack_require__(6049);
const signaling_1 = __webpack_require__(3992);
const serverconnection_1 = __webpack_require__(2920);
const basemanager_1 = __webpack_require__(3867);
/**
 * The url for the lab workspaces service.
 */
const SERVICE_USER_URL = 'api/me';
/**
 * The service's ID.
 * Used to uniquely identify the poll, and
 * the item in local storage.
 */
const SERVICE_ID = '@jupyterlab/services:UserManager#user';
/**
 * The user API service manager.
 */
class UserManager extends basemanager_1.BaseManager {
    /**
     * Create a new user manager.
     */
    constructor(options = {}) {
        var _a;
        super(options);
        this._isReady = false;
        this._userChanged = new signaling_1.Signal(this);
        this._connectionFailure = new signaling_1.Signal(this);
        // Initialize internal data.
        this._ready = this.requestUser()
            .then(() => {
            if (this.isDisposed) {
                return;
            }
            this._isReady = true;
        })
            .catch(_ => 
        // Return a promise that will never resolve, so user service is never ready
        // This typically occurs when the backend has no user service
        new Promise(() => {
            // no-op
        }));
        this._pollSpecs = new polling_1.Poll({
            auto: false,
            factory: () => this.requestUser(),
            frequency: {
                interval: 61 * 1000,
                backoff: true,
                max: 300 * 1000
            },
            name: SERVICE_ID,
            standby: (_a = options.standby) !== null && _a !== void 0 ? _a : 'when-hidden'
        });
        void this.ready.then(() => {
            void this._pollSpecs.start();
        });
    }
    /**
     * Test whether the manager is ready.
     */
    get isReady() {
        return this._isReady;
    }
    /**
     * A promise that fulfills when the manager is ready.
     */
    get ready() {
        return this._ready;
    }
    /**
     * Get the most recently fetched identity.
     */
    get identity() {
        return this._identity;
    }
    /**
     * Get the most recently fetched permissions.
     */
    get permissions() {
        return this._permissions;
    }
    /**
     * A signal emitted when the user changes.
     */
    get userChanged() {
        return this._userChanged;
    }
    /**
     * A signal emitted when there is a connection failure.
     */
    get connectionFailure() {
        return this._connectionFailure;
    }
    /**
     * Dispose of the resources used by the manager.
     */
    dispose() {
        this._pollSpecs.dispose();
        super.dispose();
    }
    /**
     * Force a refresh of the specs from the server.
     *
     * @returns A promise that resolves when the specs are fetched.
     *
     * #### Notes
     * This is intended to be called only in response to a user action,
     * since the manager maintains its internal state.
     */
    async refreshUser() {
        await this._pollSpecs.refresh();
        await this._pollSpecs.tick;
    }
    /**
     * Execute a request to the server to poll the user and update state.
     */
    async requestUser() {
        if (this.isDisposed) {
            return;
        }
        const { baseUrl } = this.serverSettings;
        const { makeRequest, ResponseError } = serverconnection_1.ServerConnection;
        const url = coreutils_1.URLExt.join(baseUrl, SERVICE_USER_URL);
        const response = await makeRequest(url, {}, this.serverSettings);
        if (response.status !== 200) {
            const err = await ResponseError.create(response);
            throw err;
        }
        const oldUser = {
            identity: this._identity,
            permissions: this._permissions
        };
        const newUser = await response.json();
        const identity = newUser.identity;
        // store the color and initials for the user
        // this info is not provided by the server
        const { localStorage } = window;
        const data = localStorage.getItem(SERVICE_ID);
        if (data && (!identity.initials || !identity.color)) {
            const localUser = JSON.parse(data);
            identity.initials =
                identity.initials ||
                    localUser.initials ||
                    identity.name.substring(0, 1);
            identity.color =
                identity.color || localUser.color || Private.getRandomColor();
        }
        if (!coreutils_2.JSONExt.deepEqual(newUser, oldUser)) {
            this._identity = identity;
            this._permissions = newUser.permissions;
            localStorage.setItem(SERVICE_ID, JSON.stringify(identity));
            this._userChanged.emit(newUser);
        }
    }
}
exports.UserManager = UserManager;
/**
 * A namespace for module-private functionality.
 *
 * Note: We do not want to export this function
 * to move it to css variables in the Theme.
 */
var Private;
(function (Private) {
    /**
     * Predefined colors for users
     */
    const userColors = [
        'var(--jp-collaborator-color1)',
        'var(--jp-collaborator-color2)',
        'var(--jp-collaborator-color3)',
        'var(--jp-collaborator-color4)',
        'var(--jp-collaborator-color5)',
        'var(--jp-collaborator-color6)',
        'var(--jp-collaborator-color7)'
    ];
    /**
     * Get a random color from the list of colors.
     */
    Private.getRandomColor = () => userColors[Math.floor(Math.random() * userColors.length)];
})(Private || (Private = {}));
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 7441:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.validateProperty = void 0;
/**
 * Validate a property as being on an object, and optionally
 * of a given type and among a given set of values.
 */
function validateProperty(
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
object, name, typeName, values = []) {
    if (!object.hasOwnProperty(name)) {
        throw Error(`Missing property '${name}'`);
    }
    const value = object[name];
    if (typeName !== void 0) {
        let valid = true;
        switch (typeName) {
            case 'array':
                valid = Array.isArray(value);
                break;
            case 'object':
                valid = typeof value !== 'undefined';
                break;
            default:
                valid = typeof value === typeName;
        }
        if (!valid) {
            throw new Error(`Property '${name}' is not of type '${typeName}'`);
        }
        if (values.length > 0) {
            let valid = true;
            switch (typeName) {
                case 'string':
                case 'number':
                case 'boolean':
                    valid = values.includes(value);
                    break;
                default:
                    valid = values.findIndex(v => v === value) >= 0;
                    break;
            }
            if (!valid) {
                throw new Error(`Property '${name}' is not one of the valid values ${JSON.stringify(values)}`);
            }
        }
    }
}
exports.validateProperty = validateProperty;
//# sourceMappingURL=validate.js.map

/***/ }),

/***/ 8053:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.WorkspaceManager = void 0;
const coreutils_1 = __webpack_require__(8925);
const statedb_1 = __webpack_require__(1670);
const serverconnection_1 = __webpack_require__(2920);
/**
 * The url for the lab workspaces service.
 */
const SERVICE_WORKSPACES_URL = 'api/workspaces';
/**
 * The workspaces API service manager.
 */
class WorkspaceManager extends statedb_1.DataConnector {
    /**
     * Create a new workspace manager.
     */
    constructor(options = {}) {
        var _a;
        super();
        this.serverSettings =
            (_a = options.serverSettings) !== null && _a !== void 0 ? _a : serverconnection_1.ServerConnection.makeSettings();
    }
    /**
     * Fetch a workspace.
     *
     * @param id - The workspace's ID.
     *
     * @returns A promise that resolves if successful.
     */
    async fetch(id) {
        const { serverSettings } = this;
        const { baseUrl, appUrl } = serverSettings;
        const { makeRequest, ResponseError } = serverconnection_1.ServerConnection;
        const base = baseUrl + appUrl;
        const url = Private.url(base, id);
        const response = await makeRequest(url, {}, serverSettings);
        if (response.status !== 200) {
            const err = await ResponseError.create(response);
            throw err;
        }
        return response.json();
    }
    /**
     * Fetch the list of workspace IDs that exist on the server.
     *
     * @returns A promise that resolves if successful.
     */
    async list() {
        const { serverSettings } = this;
        const { baseUrl, appUrl } = serverSettings;
        const { makeRequest, ResponseError } = serverconnection_1.ServerConnection;
        const base = baseUrl + appUrl;
        const url = Private.url(base, '');
        const response = await makeRequest(url, {}, serverSettings);
        if (response.status !== 200) {
            const err = await ResponseError.create(response);
            throw err;
        }
        const result = await response.json();
        return result.workspaces;
    }
    /**
     * Remove a workspace from the server.
     *
     * @param id - The workspaces's ID.
     *
     * @returns A promise that resolves if successful.
     */
    async remove(id) {
        const { serverSettings } = this;
        const { baseUrl, appUrl } = serverSettings;
        const { makeRequest, ResponseError } = serverconnection_1.ServerConnection;
        const base = baseUrl + appUrl;
        const url = Private.url(base, id);
        const init = { method: 'DELETE' };
        const response = await makeRequest(url, init, serverSettings);
        if (response.status !== 204) {
            const err = await ResponseError.create(response);
            throw err;
        }
    }
    /**
     * Save a workspace.
     *
     * @param id - The workspace's ID.
     *
     * @param workspace - The workspace being saved.
     *
     * @returns A promise that resolves if successful.
     */
    async save(id, workspace) {
        const { serverSettings } = this;
        const { baseUrl, appUrl } = serverSettings;
        const { makeRequest, ResponseError } = serverconnection_1.ServerConnection;
        const base = baseUrl + appUrl;
        const url = Private.url(base, id);
        const init = { body: JSON.stringify(workspace), method: 'PUT' };
        const response = await makeRequest(url, init, serverSettings);
        if (response.status !== 204) {
            const err = await ResponseError.create(response);
            throw err;
        }
    }
}
exports.WorkspaceManager = WorkspaceManager;
/**
 * A namespace for private data.
 */
var Private;
(function (Private) {
    /**
     * Get the url for a workspace.
     */
    function url(base, id) {
        const workspacesBase = coreutils_1.URLExt.join(base, SERVICE_WORKSPACES_URL);
        const result = coreutils_1.URLExt.join(workspacesBase, id);
        if (!result.startsWith(workspacesBase)) {
            throw new Error('Can only be used for workspaces requests');
        }
        return result;
    }
    Private.url = url;
})(Private || (Private = {}));
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 4949:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.DataConnector = void 0;
/**
 * An abstract class that adheres to the data connector interface.
 *
 * @typeparam T - The basic entity response type a service's connector.
 *
 * @typeparam U - The basic entity request type, which is conventionally the
 * same as the response type but may be different if a service's implementation
 * requires input data to be different from output responses. Defaults to `T`.
 *
 * @typeparam V - The basic token applied to a request, conventionally a string
 * ID or filter, but may be set to a different type when an implementation
 * requires it. Defaults to `string`.
 *
 * @typeparam W - The type of the optional `query` parameter of the `list`
 * method. Defaults to `string`.
 *
 * #### Notes
 * The only abstract method in this class is the `fetch` method, which must be
 * reimplemented by all subclasses. The `remove` and `save` methods have a
 * default implementation that returns a promise that will always reject. This
 * class is a convenience superclass for connectors that only need to `fetch`.
 */
class DataConnector {
    /**
     * Retrieve the list of items available from the data connector.
     *
     * @param query - The optional query filter to apply to the connector request.
     *
     * @returns A promise that always rejects with an error.
     *
     * #### Notes
     * Subclasses should reimplement if they support a back-end that can list.
     */
    async list(query) {
        throw new Error('DataConnector#list method has not been implemented.');
    }
    /**
     * Remove a value using the data connector.
     *
     * @param id - The identifier for the data being removed.
     *
     * @returns A promise that always rejects with an error.
     *
     * #### Notes
     * Subclasses should reimplement if they support a back-end that can remove.
     */
    async remove(id) {
        throw new Error('DataConnector#remove method has not been implemented.');
    }
    /**
     * Save a value using the data connector.
     *
     * @param id - The identifier for the data being saved.
     *
     * @param value - The data being saved.
     *
     * @returns A promise that always rejects with an error.
     *
     * #### Notes
     * Subclasses should reimplement if they support a back-end that can save.
     */
    async save(id, value) {
        throw new Error('DataConnector#save method has not been implemented.');
    }
}
exports.DataConnector = DataConnector;
//# sourceMappingURL=dataconnector.js.map

/***/ }),

/***/ 1670:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

"use strict";

/* -----------------------------------------------------------------------------
| Copyright (c) Jupyter Development Team.
| Distributed under the terms of the Modified BSD License.
|----------------------------------------------------------------------------*/
/**
 * @packageDocumentation
 * @module statedb
 */
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __exportStar = (this && this.__exportStar) || function(m, exports) {
    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
};
Object.defineProperty(exports, "__esModule", ({ value: true }));
__exportStar(__webpack_require__(4949), exports);
__exportStar(__webpack_require__(9708), exports);
__exportStar(__webpack_require__(4025), exports);
__exportStar(__webpack_require__(2133), exports);
__exportStar(__webpack_require__(8022), exports);
//# sourceMappingURL=index.js.map

/***/ }),

/***/ 9708:
/***/ ((__unused_webpack_module, exports) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
//# sourceMappingURL=interfaces.js.map

/***/ }),

/***/ 4025:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.RestorablePool = void 0;
const coreutils_1 = __webpack_require__(5764);
const properties_1 = __webpack_require__(6573);
const signaling_1 = __webpack_require__(3992);
/**
 * An object pool that supports restoration.
 *
 * @typeparam T - The type of object being tracked.
 */
class RestorablePool {
    /**
     * Create a new restorable pool.
     *
     * @param options - The instantiation options for a restorable pool.
     */
    constructor(options) {
        this._added = new signaling_1.Signal(this);
        this._current = null;
        this._currentChanged = new signaling_1.Signal(this);
        this._hasRestored = false;
        this._isDisposed = false;
        this._objects = new Set();
        this._restore = null;
        this._restored = new coreutils_1.PromiseDelegate();
        this._updated = new signaling_1.Signal(this);
        this.namespace = options.namespace;
    }
    /**
     * A signal emitted when an object object is added.
     *
     * #### Notes
     * This signal will only fire when an object is added to the pool.
     * It will not fire if an object injected into the pool.
     */
    get added() {
        return this._added;
    }
    /**
     * The current object.
     *
     * #### Notes
     * The restorable pool does not set `current`. It is intended for client use.
     *
     * If `current` is set to an object that does not exist in the pool, it is a
     * no-op.
     */
    get current() {
        return this._current;
    }
    set current(obj) {
        if (this._current === obj) {
            return;
        }
        if (obj !== null && this._objects.has(obj)) {
            this._current = obj;
            this._currentChanged.emit(this._current);
        }
    }
    /**
     * A signal emitted when the current widget changes.
     */
    get currentChanged() {
        return this._currentChanged;
    }
    /**
     * Test whether the pool is disposed.
     */
    get isDisposed() {
        return this._isDisposed;
    }
    /**
     * A promise resolved when the restorable pool has been restored.
     */
    get restored() {
        return this._restored.promise;
    }
    /**
     * The number of objects held by the pool.
     */
    get size() {
        return this._objects.size;
    }
    /**
     * A signal emitted when an object is updated.
     */
    get updated() {
        return this._updated;
    }
    /**
     * Add a new object to the pool.
     *
     * @param obj - The object object being added.
     *
     * #### Notes
     * The object passed into the pool is added synchronously; its existence in
     * the pool can be checked with the `has()` method. The promise this method
     * returns resolves after the object has been added and saved to an underlying
     * restoration connector, if one is available.
     */
    async add(obj) {
        var _a, _b;
        if (obj.isDisposed) {
            const warning = 'A disposed object cannot be added.';
            console.warn(warning, obj);
            throw new Error(warning);
        }
        if (this._objects.has(obj)) {
            const warning = 'This object already exists in the pool.';
            console.warn(warning, obj);
            throw new Error(warning);
        }
        this._objects.add(obj);
        obj.disposed.connect(this._onInstanceDisposed, this);
        if (Private.injectedProperty.get(obj)) {
            return;
        }
        if (this._restore) {
            const { connector } = this._restore;
            const objName = this._restore.name(obj);
            if (objName) {
                const name = `${this.namespace}:${objName}`;
                const data = (_b = (_a = this._restore).args) === null || _b === void 0 ? void 0 : _b.call(_a, obj);
                Private.nameProperty.set(obj, name);
                await connector.save(name, { data });
            }
        }
        // Emit the added signal.
        this._added.emit(obj);
    }
    /**
     * Dispose of the resources held by the pool.
     *
     * #### Notes
     * Disposing a pool does not affect the underlying data in the data connector,
     * it simply disposes the client-side pool without making any connector calls.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._current = null;
        this._isDisposed = true;
        this._objects.clear();
        signaling_1.Signal.clearData(this);
    }
    /**
     * Find the first object in the pool that satisfies a filter function.
     *
     * @param fn The filter function to call on each object.
     */
    find(fn) {
        const values = this._objects.values();
        for (const value of values) {
            if (fn(value)) {
                return value;
            }
        }
        return undefined;
    }
    /**
     * Iterate through each object in the pool.
     *
     * @param fn - The function to call on each object.
     */
    forEach(fn) {
        this._objects.forEach(fn);
    }
    /**
     * Filter the objects in the pool based on a predicate.
     *
     * @param fn - The function by which to filter.
     */
    filter(fn) {
        const filtered = [];
        this.forEach(obj => {
            if (fn(obj)) {
                filtered.push(obj);
            }
        });
        return filtered;
    }
    /**
     * Inject an object into the restorable pool without the pool handling its
     * restoration lifecycle.
     *
     * @param obj - The object to inject into the pool.
     */
    inject(obj) {
        Private.injectedProperty.set(obj, true);
        return this.add(obj);
    }
    /**
     * Check if this pool has the specified object.
     *
     * @param obj - The object whose existence is being checked.
     */
    has(obj) {
        return this._objects.has(obj);
    }
    /**
     * Restore the objects in this pool's namespace.
     *
     * @param options - The configuration options that describe restoration.
     *
     * @returns A promise that resolves when restoration has completed.
     *
     * #### Notes
     * This function should almost never be invoked by client code. Its primary
     * use case is to be invoked by a layout restorer plugin that handles
     * multiple restorable pools and, when ready, asks them each to restore their
     * respective objects.
     */
    async restore(options) {
        if (this._hasRestored) {
            throw new Error('This pool has already been restored.');
        }
        this._hasRestored = true;
        const { command, connector, registry, when } = options;
        const namespace = this.namespace;
        const promises = when
            ? [connector.list(namespace)].concat(when)
            : [connector.list(namespace)];
        this._restore = options;
        const [saved] = await Promise.all(promises);
        const values = await Promise.all(saved.ids.map(async (id, index) => {
            const value = saved.values[index];
            const args = value && value.data;
            if (args === undefined) {
                return connector.remove(id);
            }
            // Execute the command and if it fails, delete the state restore data.
            return registry
                .execute(command, args)
                .catch(() => connector.remove(id));
        }));
        this._restored.resolve();
        return values;
    }
    /**
     * Save the restore data for a given object.
     *
     * @param obj - The object being saved.
     */
    async save(obj) {
        var _a, _b;
        const injected = Private.injectedProperty.get(obj);
        if (!this._restore || !this.has(obj) || injected) {
            return;
        }
        const { connector } = this._restore;
        const objName = this._restore.name(obj);
        const oldName = Private.nameProperty.get(obj);
        const newName = objName ? `${this.namespace}:${objName}` : '';
        if (oldName && oldName !== newName) {
            await connector.remove(oldName);
        }
        // Set the name property irrespective of whether the new name is null.
        Private.nameProperty.set(obj, newName);
        if (newName) {
            const data = (_b = (_a = this._restore).args) === null || _b === void 0 ? void 0 : _b.call(_a, obj);
            await connector.save(newName, { data });
        }
        if (oldName !== newName) {
            this._updated.emit(obj);
        }
    }
    /**
     * Clean up after disposed objects.
     */
    _onInstanceDisposed(obj) {
        this._objects.delete(obj);
        if (obj === this._current) {
            this._current = null;
            this._currentChanged.emit(this._current);
        }
        if (Private.injectedProperty.get(obj)) {
            return;
        }
        if (!this._restore) {
            return;
        }
        const { connector } = this._restore;
        const name = Private.nameProperty.get(obj);
        if (name) {
            void connector.remove(name);
        }
    }
}
exports.RestorablePool = RestorablePool;
/*
 * A namespace for private data.
 */
var Private;
(function (Private) {
    /**
     * An attached property to indicate whether an object has been injected.
     */
    Private.injectedProperty = new properties_1.AttachedProperty({
        name: 'injected',
        create: () => false
    });
    /**
     * An attached property for an object's ID.
     */
    Private.nameProperty = new properties_1.AttachedProperty({
        name: 'name',
        create: () => ''
    });
})(Private || (Private = {}));
//# sourceMappingURL=restorablepool.js.map

/***/ }),

/***/ 2133:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.StateDB = void 0;
const signaling_1 = __webpack_require__(3992);
/**
 * The default concrete implementation of a state database.
 */
class StateDB {
    /**
     * Create a new state database.
     *
     * @param options - The instantiation options for a state database.
     */
    constructor(options = {}) {
        this._changed = new signaling_1.Signal(this);
        const { connector, transform } = options;
        this._connector = connector || new StateDB.Connector();
        if (!transform) {
            this._ready = Promise.resolve(undefined);
        }
        else {
            this._ready = transform.then(transformation => {
                const { contents, type } = transformation;
                switch (type) {
                    case 'cancel':
                        return;
                    case 'clear':
                        return this._clear();
                    case 'merge':
                        return this._merge(contents || {});
                    case 'overwrite':
                        return this._overwrite(contents || {});
                    default:
                        return;
                }
            });
        }
    }
    /**
     * A signal that emits the change type any time a value changes.
     */
    get changed() {
        return this._changed;
    }
    /**
     * Clear the entire database.
     */
    async clear() {
        await this._ready;
        await this._clear();
    }
    /**
     * Retrieve a saved bundle from the database.
     *
     * @param id - The identifier used to retrieve a data bundle.
     *
     * @returns A promise that bears a data payload if available.
     *
     * #### Notes
     * The `id` values of stored items in the state database are formatted:
     * `'namespace:identifier'`, which is the same convention that command
     * identifiers in JupyterLab use as well. While this is not a technical
     * requirement for `fetch()`, `remove()`, and `save()`, it *is* necessary for
     * using the `list(namespace: string)` method.
     *
     * The promise returned by this method may be rejected if an error occurs in
     * retrieving the data. Non-existence of an `id` will succeed with the `value`
     * `undefined`.
     */
    async fetch(id) {
        await this._ready;
        return this._fetch(id);
    }
    /**
     * Retrieve all the saved bundles for a namespace.
     *
     * @param namespace The namespace prefix to retrieve.
     *
     * @returns A promise that bears a collection of payloads for a namespace.
     *
     * #### Notes
     * Namespaces are entirely conventional entities. The `id` values of stored
     * items in the state database are formatted: `'namespace:identifier'`, which
     * is the same convention that command identifiers in JupyterLab use as well.
     *
     * If there are any errors in retrieving the data, they will be logged to the
     * console in order to optimistically return any extant data without failing.
     * This promise will always succeed.
     */
    async list(namespace) {
        await this._ready;
        return this._list(namespace);
    }
    /**
     * Remove a value from the database.
     *
     * @param id - The identifier for the data being removed.
     *
     * @returns A promise that is rejected if remove fails and succeeds otherwise.
     */
    async remove(id) {
        await this._ready;
        await this._remove(id);
        this._changed.emit({ id, type: 'remove' });
    }
    /**
     * Save a value in the database.
     *
     * @param id - The identifier for the data being saved.
     *
     * @param value - The data being saved.
     *
     * @returns A promise that is rejected if saving fails and succeeds otherwise.
     *
     * #### Notes
     * The `id` values of stored items in the state database are formatted:
     * `'namespace:identifier'`, which is the same convention that command
     * identifiers in JupyterLab use as well. While this is not a technical
     * requirement for `fetch()`, `remove()`, and `save()`, it *is* necessary for
     * using the `list(namespace: string)` method.
     */
    async save(id, value) {
        await this._ready;
        await this._save(id, value);
        this._changed.emit({ id, type: 'save' });
    }
    /**
     * Return a serialized copy of the state database's entire contents.
     *
     * @returns A promise that resolves with the database contents as JSON.
     */
    async toJSON() {
        await this._ready;
        const { ids, values } = await this._list();
        return values.reduce((acc, val, idx) => {
            acc[ids[idx]] = val;
            return acc;
        }, {});
    }
    /**
     * Clear the entire database.
     */
    async _clear() {
        await Promise.all((await this._list()).ids.map(id => this._remove(id)));
    }
    /**
     * Fetch a value from the database.
     */
    async _fetch(id) {
        const value = await this._connector.fetch(id);
        if (value) {
            return JSON.parse(value).v;
        }
    }
    /**
     * Fetch a list from the database.
     */
    async _list(namespace = '') {
        const { ids, values } = await this._connector.list(namespace);
        return {
            ids,
            values: values.map(val => JSON.parse(val).v)
        };
    }
    /**
     * Merge data into the state database.
     */
    async _merge(contents) {
        await Promise.all(Object.keys(contents).map(key => contents[key] && this._save(key, contents[key])));
    }
    /**
     * Overwrite the entire database with new contents.
     */
    async _overwrite(contents) {
        await this._clear();
        await this._merge(contents);
    }
    /**
     * Remove a key in the database.
     */
    async _remove(id) {
        return this._connector.remove(id);
    }
    /**
     * Save a key and its value in the database.
     */
    async _save(id, value) {
        return this._connector.save(id, JSON.stringify({ v: value }));
    }
}
exports.StateDB = StateDB;
/**
 * A namespace for StateDB statics.
 */
(function (StateDB) {
    /**
     * An in-memory string key/value data connector.
     */
    class Connector {
        constructor() {
            this._storage = {};
        }
        /**
         * Retrieve an item from the data connector.
         */
        async fetch(id) {
            return this._storage[id];
        }
        /**
         * Retrieve the list of items available from the data connector.
         *
         * @param namespace - If not empty, only keys whose first token before `:`
         * exactly match `namespace` will be returned, e.g. `foo` in `foo:bar`.
         */
        async list(namespace = '') {
            return Object.keys(this._storage).reduce((acc, val) => {
                if (namespace === '' ? true : namespace === val.split(':')[0]) {
                    acc.ids.push(val);
                    acc.values.push(this._storage[val]);
                }
                return acc;
            }, { ids: [], values: [] });
        }
        /**
         * Remove a value using the data connector.
         */
        async remove(id) {
            delete this._storage[id];
        }
        /**
         * Save a value using the data connector.
         */
        async save(id, value) {
            this._storage[id] = value;
        }
    }
    StateDB.Connector = Connector;
})(StateDB || (exports.StateDB = StateDB = {}));
//# sourceMappingURL=statedb.js.map

/***/ }),

/***/ 8022:
/***/ ((__unused_webpack_module, exports, __webpack_require__) => {

"use strict";

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
Object.defineProperty(exports, "__esModule", ({ value: true }));
exports.IStateDB = void 0;
const coreutils_1 = __webpack_require__(5764);
/**
 * The default state database token.
 */
exports.IStateDB = new coreutils_1.Token('@jupyterlab/coreutils:IStateDB', `A service for the JupyterLab state database.
  Use this if you want to store data that will persist across page loads.
  See "state database" for more information.`);
//# sourceMappingURL=tokens.js.map

/***/ }),

/***/ 8135:
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   ArrayExt: () => (/* binding */ ArrayExt),
/* harmony export */   StringExt: () => (/* binding */ StringExt),
/* harmony export */   chain: () => (/* binding */ chain),
/* harmony export */   each: () => (/* binding */ each),
/* harmony export */   empty: () => (/* binding */ empty),
/* harmony export */   enumerate: () => (/* binding */ enumerate),
/* harmony export */   every: () => (/* binding */ every),
/* harmony export */   filter: () => (/* binding */ filter),
/* harmony export */   find: () => (/* binding */ find),
/* harmony export */   findIndex: () => (/* binding */ findIndex),
/* harmony export */   map: () => (/* binding */ map),
/* harmony export */   max: () => (/* binding */ max),
/* harmony export */   min: () => (/* binding */ min),
/* harmony export */   minmax: () => (/* binding */ minmax),
/* harmony export */   once: () => (/* binding */ once),
/* harmony export */   range: () => (/* binding */ range),
/* harmony export */   reduce: () => (/* binding */ reduce),
/* harmony export */   repeat: () => (/* binding */ repeat),
/* harmony export */   retro: () => (/* binding */ retro),
/* harmony export */   some: () => (/* binding */ some),
/* harmony export */   stride: () => (/* binding */ stride),
/* harmony export */   take: () => (/* binding */ take),
/* harmony export */   toArray: () => (/* binding */ toArray),
/* harmony export */   toObject: () => (/* binding */ toObject),
/* harmony export */   topologicSort: () => (/* binding */ topologicSort),
/* harmony export */   zip: () => (/* binding */ zip)
/* harmony export */ });
// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * The namespace for array-specific algorithms.
 */
var ArrayExt;
(function (ArrayExt) {
    /**
     * Find the index of the first occurrence of a value in an array.
     *
     * @param array - The array-like object to search.
     *
     * @param value - The value to locate in the array. Values are
     *   compared using strict `===` equality.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The index of the first occurrence of the value, or `-1`
     *   if the value is not found.
     *
     * #### Notes
     * If `stop < start` the search will wrap at the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `start` or `stop` which is non-integral.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = ['one', 'two', 'three', 'four', 'one'];
     * ArrayExt.firstIndexOf(data, 'red');        // -1
     * ArrayExt.firstIndexOf(data, 'one');        // 0
     * ArrayExt.firstIndexOf(data, 'one', 1);     // 4
     * ArrayExt.firstIndexOf(data, 'two', 2);     // -1
     * ArrayExt.firstIndexOf(data, 'two', 2, 1);  // 1
     * ```
     */
    function firstIndexOf(array, value, start = 0, stop = -1) {
        let n = array.length;
        if (n === 0) {
            return -1;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        let span;
        if (stop < start) {
            span = stop + 1 + (n - start);
        }
        else {
            span = stop - start + 1;
        }
        for (let i = 0; i < span; ++i) {
            let j = (start + i) % n;
            if (array[j] === value) {
                return j;
            }
        }
        return -1;
    }
    ArrayExt.firstIndexOf = firstIndexOf;
    /**
     * Find the index of the last occurrence of a value in an array.
     *
     * @param array - The array-like object to search.
     *
     * @param value - The value to locate in the array. Values are
     *   compared using strict `===` equality.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The index of the last occurrence of the value, or `-1`
     *   if the value is not found.
     *
     * #### Notes
     * If `start < stop` the search will wrap at the front of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `start` or `stop` which is non-integral.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = ['one', 'two', 'three', 'four', 'one'];
     * ArrayExt.lastIndexOf(data, 'red');        // -1
     * ArrayExt.lastIndexOf(data, 'one');        // 4
     * ArrayExt.lastIndexOf(data, 'one', 1);     // 0
     * ArrayExt.lastIndexOf(data, 'two', 0);     // -1
     * ArrayExt.lastIndexOf(data, 'two', 0, 1);  // 1
     * ```
     */
    function lastIndexOf(array, value, start = -1, stop = 0) {
        let n = array.length;
        if (n === 0) {
            return -1;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        let span;
        if (start < stop) {
            span = start + 1 + (n - stop);
        }
        else {
            span = start - stop + 1;
        }
        for (let i = 0; i < span; ++i) {
            let j = (start - i + n) % n;
            if (array[j] === value) {
                return j;
            }
        }
        return -1;
    }
    ArrayExt.lastIndexOf = lastIndexOf;
    /**
     * Find the index of the first value which matches a predicate.
     *
     * @param array - The array-like object to search.
     *
     * @param fn - The predicate function to apply to the values.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The index of the first matching value, or `-1` if no
     *   matching value is found.
     *
     * #### Notes
     * If `stop < start` the search will wrap at the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `start` or `stop` which is non-integral.
     *
     * Modifying the length of the array while searching.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * function isEven(value: number): boolean {
     *   return value % 2 === 0;
     * }
     *
     * let data = [1, 2, 3, 4, 3, 2, 1];
     * ArrayExt.findFirstIndex(data, isEven);       // 1
     * ArrayExt.findFirstIndex(data, isEven, 4);    // 5
     * ArrayExt.findFirstIndex(data, isEven, 6);    // -1
     * ArrayExt.findFirstIndex(data, isEven, 6, 5); // 1
     * ```
     */
    function findFirstIndex(array, fn, start = 0, stop = -1) {
        let n = array.length;
        if (n === 0) {
            return -1;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        let span;
        if (stop < start) {
            span = stop + 1 + (n - start);
        }
        else {
            span = stop - start + 1;
        }
        for (let i = 0; i < span; ++i) {
            let j = (start + i) % n;
            if (fn(array[j], j)) {
                return j;
            }
        }
        return -1;
    }
    ArrayExt.findFirstIndex = findFirstIndex;
    /**
     * Find the index of the last value which matches a predicate.
     *
     * @param array - The array-like object to search.
     *
     * @param fn - The predicate function to apply to the values.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The index of the last matching value, or `-1` if no
     *   matching value is found.
     *
     * #### Notes
     * If `start < stop` the search will wrap at the front of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `start` or `stop` which is non-integral.
     *
     * Modifying the length of the array while searching.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * function isEven(value: number): boolean {
     *   return value % 2 === 0;
     * }
     *
     * let data = [1, 2, 3, 4, 3, 2, 1];
     * ArrayExt.findLastIndex(data, isEven);        // 5
     * ArrayExt.findLastIndex(data, isEven, 4);     // 3
     * ArrayExt.findLastIndex(data, isEven, 0);     // -1
     * ArrayExt.findLastIndex(data, isEven, 0, 1);  // 5
     * ```
     */
    function findLastIndex(array, fn, start = -1, stop = 0) {
        let n = array.length;
        if (n === 0) {
            return -1;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        let d;
        if (start < stop) {
            d = start + 1 + (n - stop);
        }
        else {
            d = start - stop + 1;
        }
        for (let i = 0; i < d; ++i) {
            let j = (start - i + n) % n;
            if (fn(array[j], j)) {
                return j;
            }
        }
        return -1;
    }
    ArrayExt.findLastIndex = findLastIndex;
    /**
     * Find the first value which matches a predicate.
     *
     * @param array - The array-like object to search.
     *
     * @param fn - The predicate function to apply to the values.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The first matching value, or `undefined` if no matching
     *   value is found.
     *
     * #### Notes
     * If `stop < start` the search will wrap at the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `start` or `stop` which is non-integral.
     *
     * Modifying the length of the array while searching.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * function isEven(value: number): boolean {
     *   return value % 2 === 0;
     * }
     *
     * let data = [1, 2, 3, 4, 3, 2, 1];
     * ArrayExt.findFirstValue(data, isEven);       // 2
     * ArrayExt.findFirstValue(data, isEven, 2);    // 4
     * ArrayExt.findFirstValue(data, isEven, 6);    // undefined
     * ArrayExt.findFirstValue(data, isEven, 6, 5); // 2
     * ```
     */
    function findFirstValue(array, fn, start = 0, stop = -1) {
        let index = findFirstIndex(array, fn, start, stop);
        return index !== -1 ? array[index] : undefined;
    }
    ArrayExt.findFirstValue = findFirstValue;
    /**
     * Find the last value which matches a predicate.
     *
     * @param object - The array-like object to search.
     *
     * @param fn - The predicate function to apply to the values.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The last matching value, or `undefined` if no matching
     *   value is found.
     *
     * #### Notes
     * If `start < stop` the search will wrap at the front of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `start` or `stop` which is non-integral.
     *
     * Modifying the length of the array while searching.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * function isEven(value: number): boolean {
     *   return value % 2 === 0;
     * }
     *
     * let data = [1, 2, 3, 4, 3, 2, 1];
     * ArrayExt.findLastValue(data, isEven);        // 2
     * ArrayExt.findLastValue(data, isEven, 4);     // 4
     * ArrayExt.findLastValue(data, isEven, 0);     // undefined
     * ArrayExt.findLastValue(data, isEven, 0, 1);  // 2
     * ```
     */
    function findLastValue(array, fn, start = -1, stop = 0) {
        let index = findLastIndex(array, fn, start, stop);
        return index !== -1 ? array[index] : undefined;
    }
    ArrayExt.findLastValue = findLastValue;
    /**
     * Find the index of the first element which compares `>=` to a value.
     *
     * @param array - The sorted array-like object to search.
     *
     * @param value - The value to locate in the array.
     *
     * @param fn - The 3-way comparison function to apply to the values.
     *   It should return `< 0` if an element is less than a value, `0` if
     *   an element is equal to a value, or `> 0` if an element is greater
     *   than a value.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The index of the first element which compares `>=` to the
     *   value, or `length` if there is no such element. If the computed
     *   index for `stop` is less than `start`, then the computed index
     *   for `start` is returned.
     *
     * #### Notes
     * The array must already be sorted in ascending order according to
     * the comparison function.
     *
     * #### Complexity
     * Logarithmic.
     *
     * #### Undefined Behavior
     * Searching a range which is not sorted in ascending order.
     *
     * A `start` or `stop` which is non-integral.
     *
     * Modifying the length of the array while searching.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * function numberCmp(a: number, b: number): number {
     *   return a - b;
     * }
     *
     * let data = [0, 3, 4, 7, 7, 9];
     * ArrayExt.lowerBound(data, 0, numberCmp);   // 0
     * ArrayExt.lowerBound(data, 6, numberCmp);   // 3
     * ArrayExt.lowerBound(data, 7, numberCmp);   // 3
     * ArrayExt.lowerBound(data, -1, numberCmp);  // 0
     * ArrayExt.lowerBound(data, 10, numberCmp);  // 6
     * ```
     */
    function lowerBound(array, value, fn, start = 0, stop = -1) {
        let n = array.length;
        if (n === 0) {
            return 0;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        let begin = start;
        let span = stop - start + 1;
        while (span > 0) {
            let half = span >> 1;
            let middle = begin + half;
            if (fn(array[middle], value) < 0) {
                begin = middle + 1;
                span -= half + 1;
            }
            else {
                span = half;
            }
        }
        return begin;
    }
    ArrayExt.lowerBound = lowerBound;
    /**
     * Find the index of the first element which compares `>` than a value.
     *
     * @param array - The sorted array-like object to search.
     *
     * @param value - The value to locate in the array.
     *
     * @param fn - The 3-way comparison function to apply to the values.
     *   It should return `< 0` if an element is less than a value, `0` if
     *   an element is equal to a value, or `> 0` if an element is greater
     *   than a value.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The index of the first element which compares `>` than the
     *   value, or `length` if there is no such element. If the computed
     *   index for `stop` is less than `start`, then the computed index
     *   for `start` is returned.
     *
     * #### Notes
     * The array must already be sorted in ascending order according to
     * the comparison function.
     *
     * #### Complexity
     * Logarithmic.
     *
     * #### Undefined Behavior
     * Searching a range which is not sorted in ascending order.
     *
     * A `start` or `stop` which is non-integral.
     *
     * Modifying the length of the array while searching.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * function numberCmp(a: number, b: number): number {
     *   return a - b;
     * }
     *
     * let data = [0, 3, 4, 7, 7, 9];
     * ArrayExt.upperBound(data, 0, numberCmp);   // 1
     * ArrayExt.upperBound(data, 6, numberCmp);   // 3
     * ArrayExt.upperBound(data, 7, numberCmp);   // 5
     * ArrayExt.upperBound(data, -1, numberCmp);  // 0
     * ArrayExt.upperBound(data, 10, numberCmp);  // 6
     * ```
     */
    function upperBound(array, value, fn, start = 0, stop = -1) {
        let n = array.length;
        if (n === 0) {
            return 0;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        let begin = start;
        let span = stop - start + 1;
        while (span > 0) {
            let half = span >> 1;
            let middle = begin + half;
            if (fn(array[middle], value) > 0) {
                span = half;
            }
            else {
                begin = middle + 1;
                span -= half + 1;
            }
        }
        return begin;
    }
    ArrayExt.upperBound = upperBound;
    /**
     * Test whether two arrays are shallowly equal.
     *
     * @param a - The first array-like object to compare.
     *
     * @param b - The second array-like object to compare.
     *
     * @param fn - The comparison function to apply to the elements. It
     *   should return `true` if the elements are "equal". The default
     *   compares elements using strict `===` equality.
     *
     * @returns Whether the two arrays are shallowly equal.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * Modifying the length of the arrays while comparing.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let d1 = [0, 3, 4, 7, 7, 9];
     * let d2 = [0, 3, 4, 7, 7, 9];
     * let d3 = [42];
     * ArrayExt.shallowEqual(d1, d2);  // true
     * ArrayExt.shallowEqual(d2, d3);  // false
     * ```
     */
    function shallowEqual(a, b, fn) {
        // Check for object identity first.
        if (a === b) {
            return true;
        }
        // Bail early if the lengths are different.
        if (a.length !== b.length) {
            return false;
        }
        // Compare each element for equality.
        for (let i = 0, n = a.length; i < n; ++i) {
            if (fn ? !fn(a[i], b[i]) : a[i] !== b[i]) {
                return false;
            }
        }
        // The array are shallowly equal.
        return true;
    }
    ArrayExt.shallowEqual = shallowEqual;
    /**
     * Create a slice of an array subject to an optional step.
     *
     * @param array - The array-like object of interest.
     *
     * @param options - The options for configuring the slice.
     *
     * @returns A new array with the specified values.
     *
     * @throws An exception if the slice `step` is `0`.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `start`, `stop`, or `step` which is non-integral.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = [0, 3, 4, 7, 7, 9];
     * ArrayExt.slice(data);                         // [0, 3, 4, 7, 7, 9]
     * ArrayExt.slice(data, { start: 2 });           // [4, 7, 7, 9]
     * ArrayExt.slice(data, { start: 0, stop: 4 });  // [0, 3, 4, 7]
     * ArrayExt.slice(data, { step: 2 });            // [0, 4, 7]
     * ArrayExt.slice(data, { step: -1 });           // [9, 7, 7, 4, 3, 0]
     * ```
     */
    function slice(array, options = {}) {
        // Extract the options.
        let { start, stop, step } = options;
        // Set up the `step` value.
        if (step === undefined) {
            step = 1;
        }
        // Validate the step size.
        if (step === 0) {
            throw new Error('Slice `step` cannot be zero.');
        }
        // Look up the length of the array.
        let n = array.length;
        // Set up the `start` value.
        if (start === undefined) {
            start = step < 0 ? n - 1 : 0;
        }
        else if (start < 0) {
            start = Math.max(start + n, step < 0 ? -1 : 0);
        }
        else if (start >= n) {
            start = step < 0 ? n - 1 : n;
        }
        // Set up the `stop` value.
        if (stop === undefined) {
            stop = step < 0 ? -1 : n;
        }
        else if (stop < 0) {
            stop = Math.max(stop + n, step < 0 ? -1 : 0);
        }
        else if (stop >= n) {
            stop = step < 0 ? n - 1 : n;
        }
        // Compute the slice length.
        let length;
        if ((step < 0 && stop >= start) || (step > 0 && start >= stop)) {
            length = 0;
        }
        else if (step < 0) {
            length = Math.floor((stop - start + 1) / step + 1);
        }
        else {
            length = Math.floor((stop - start - 1) / step + 1);
        }
        // Compute the sliced result.
        let result = [];
        for (let i = 0; i < length; ++i) {
            result[i] = array[start + i * step];
        }
        // Return the result.
        return result;
    }
    ArrayExt.slice = slice;
    /**
     * Move an element in an array from one index to another.
     *
     * @param array - The mutable array-like object of interest.
     *
     * @param fromIndex - The index of the element to move. Negative
     *   values are taken as an offset from the end of the array.
     *
     * @param toIndex - The target index of the element. Negative
     *   values are taken as an offset from the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `fromIndex` or `toIndex` which is non-integral.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from from '@lumino/algorithm';
     *
     * let data = [0, 1, 2, 3, 4];
     * ArrayExt.move(data, 1, 2);  // [0, 2, 1, 3, 4]
     * ArrayExt.move(data, 4, 2);  // [0, 2, 4, 1, 3]
     * ```
     */
    function move(array, fromIndex, toIndex) {
        let n = array.length;
        if (n <= 1) {
            return;
        }
        if (fromIndex < 0) {
            fromIndex = Math.max(0, fromIndex + n);
        }
        else {
            fromIndex = Math.min(fromIndex, n - 1);
        }
        if (toIndex < 0) {
            toIndex = Math.max(0, toIndex + n);
        }
        else {
            toIndex = Math.min(toIndex, n - 1);
        }
        if (fromIndex === toIndex) {
            return;
        }
        let value = array[fromIndex];
        let d = fromIndex < toIndex ? 1 : -1;
        for (let i = fromIndex; i !== toIndex; i += d) {
            array[i] = array[i + d];
        }
        array[toIndex] = value;
    }
    ArrayExt.move = move;
    /**
     * Reverse an array in-place.
     *
     * @param array - The mutable array-like object of interest.
     *
     * @param start - The index of the first element in the range to be
     *   reversed, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   reversed, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `start` or  `stop` index which is non-integral.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = [0, 1, 2, 3, 4];
     * ArrayExt.reverse(data, 1, 3);  // [0, 3, 2, 1, 4]
     * ArrayExt.reverse(data, 3);     // [0, 3, 2, 4, 1]
     * ArrayExt.reverse(data);        // [1, 4, 2, 3, 0]
     * ```
     */
    function reverse(array, start = 0, stop = -1) {
        let n = array.length;
        if (n <= 1) {
            return;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        while (start < stop) {
            let a = array[start];
            let b = array[stop];
            array[start++] = b;
            array[stop--] = a;
        }
    }
    ArrayExt.reverse = reverse;
    /**
     * Rotate the elements of an array in-place.
     *
     * @param array - The mutable array-like object of interest.
     *
     * @param delta - The amount of rotation to apply to the elements. A
     *   positive value will rotate the elements to the left. A negative
     *   value will rotate the elements to the right.
     *
     * @param start - The index of the first element in the range to be
     *   rotated, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   rotated, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `delta`, `start`, or `stop` which is non-integral.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = [0, 1, 2, 3, 4];
     * ArrayExt.rotate(data, 2);        // [2, 3, 4, 0, 1]
     * ArrayExt.rotate(data, -2);       // [0, 1, 2, 3, 4]
     * ArrayExt.rotate(data, 10);       // [0, 1, 2, 3, 4]
     * ArrayExt.rotate(data, 9);        // [4, 0, 1, 2, 3]
     * ArrayExt.rotate(data, 2, 1, 3);  // [4, 2, 0, 1, 3]
     * ```
     */
    function rotate(array, delta, start = 0, stop = -1) {
        let n = array.length;
        if (n <= 1) {
            return;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        if (start >= stop) {
            return;
        }
        let length = stop - start + 1;
        if (delta > 0) {
            delta = delta % length;
        }
        else if (delta < 0) {
            delta = ((delta % length) + length) % length;
        }
        if (delta === 0) {
            return;
        }
        let pivot = start + delta;
        reverse(array, start, pivot - 1);
        reverse(array, pivot, stop);
        reverse(array, start, stop);
    }
    ArrayExt.rotate = rotate;
    /**
     * Fill an array with a static value.
     *
     * @param array - The mutable array-like object to fill.
     *
     * @param value - The static value to use to fill the array.
     *
     * @param start - The index of the first element in the range to be
     *   filled, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   filled, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * #### Notes
     * If `stop < start` the fill will wrap at the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * A `start` or `stop` which is non-integral.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = ['one', 'two', 'three', 'four'];
     * ArrayExt.fill(data, 'r');        // ['r', 'r', 'r', 'r']
     * ArrayExt.fill(data, 'g', 1);     // ['r', 'g', 'g', 'g']
     * ArrayExt.fill(data, 'b', 2, 3);  // ['r', 'g', 'b', 'b']
     * ArrayExt.fill(data, 'z', 3, 1);  // ['z', 'z', 'b', 'z']
     * ```
     */
    function fill(array, value, start = 0, stop = -1) {
        let n = array.length;
        if (n === 0) {
            return;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        let span;
        if (stop < start) {
            span = stop + 1 + (n - start);
        }
        else {
            span = stop - start + 1;
        }
        for (let i = 0; i < span; ++i) {
            array[(start + i) % n] = value;
        }
    }
    ArrayExt.fill = fill;
    /**
     * Insert a value into an array at a specific index.
     *
     * @param array - The array of interest.
     *
     * @param index - The index at which to insert the value. Negative
     *   values are taken as an offset from the end of the array.
     *
     * @param value - The value to set at the specified index.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * An `index` which is non-integral.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = [0, 1, 2];
     * ArrayExt.insert(data, 0, -1);  // [-1, 0, 1, 2]
     * ArrayExt.insert(data, 2, 12);  // [-1, 0, 12, 1, 2]
     * ArrayExt.insert(data, -1, 7);  // [-1, 0, 12, 1, 7, 2]
     * ArrayExt.insert(data, 6, 19);  // [-1, 0, 12, 1, 7, 2, 19]
     * ```
     */
    function insert(array, index, value) {
        let n = array.length;
        if (index < 0) {
            index = Math.max(0, index + n);
        }
        else {
            index = Math.min(index, n);
        }
        for (let i = n; i > index; --i) {
            array[i] = array[i - 1];
        }
        array[index] = value;
    }
    ArrayExt.insert = insert;
    /**
     * Remove and return a value at a specific index in an array.
     *
     * @param array - The array of interest.
     *
     * @param index - The index of the value to remove. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The value at the specified index, or `undefined` if the
     *   index is out of range.
     *
     * #### Complexity
     * Linear.
     *
     * #### Undefined Behavior
     * An `index` which is non-integral.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = [0, 12, 23, 39, 14, 12, 75];
     * ArrayExt.removeAt(data, 2);   // 23
     * ArrayExt.removeAt(data, -2);  // 12
     * ArrayExt.removeAt(data, 10);  // undefined;
     * ```
     */
    function removeAt(array, index) {
        let n = array.length;
        if (index < 0) {
            index += n;
        }
        if (index < 0 || index >= n) {
            return undefined;
        }
        let value = array[index];
        for (let i = index + 1; i < n; ++i) {
            array[i - 1] = array[i];
        }
        array.length = n - 1;
        return value;
    }
    ArrayExt.removeAt = removeAt;
    /**
     * Remove the first occurrence of a value from an array.
     *
     * @param array - The array of interest.
     *
     * @param value - The value to remove from the array. Values are
     *   compared using strict `===` equality.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The index of the removed value, or `-1` if the value
     *   is not contained in the array.
     *
     * #### Notes
     * If `stop < start` the search will wrap at the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = [0, 12, 23, 39, 14, 12, 75];
     * ArrayExt.removeFirstOf(data, 12);        // 1
     * ArrayExt.removeFirstOf(data, 17);        // -1
     * ArrayExt.removeFirstOf(data, 39, 3);     // -1
     * ArrayExt.removeFirstOf(data, 39, 3, 2);  // 2
     * ```
     */
    function removeFirstOf(array, value, start = 0, stop = -1) {
        let index = firstIndexOf(array, value, start, stop);
        if (index !== -1) {
            removeAt(array, index);
        }
        return index;
    }
    ArrayExt.removeFirstOf = removeFirstOf;
    /**
     * Remove the last occurrence of a value from an array.
     *
     * @param array - The array of interest.
     *
     * @param value - The value to remove from the array. Values are
     *   compared using strict `===` equality.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The index of the removed value, or `-1` if the value
     *   is not contained in the array.
     *
     * #### Notes
     * If `start < stop` the search will wrap at the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = [0, 12, 23, 39, 14, 12, 75];
     * ArrayExt.removeLastOf(data, 12);        // 5
     * ArrayExt.removeLastOf(data, 17);        // -1
     * ArrayExt.removeLastOf(data, 39, 2);     // -1
     * ArrayExt.removeLastOf(data, 39, 2, 3);  // 3
     * ```
     */
    function removeLastOf(array, value, start = -1, stop = 0) {
        let index = lastIndexOf(array, value, start, stop);
        if (index !== -1) {
            removeAt(array, index);
        }
        return index;
    }
    ArrayExt.removeLastOf = removeLastOf;
    /**
     * Remove all occurrences of a value from an array.
     *
     * @param array - The array of interest.
     *
     * @param value - The value to remove from the array. Values are
     *   compared using strict `===` equality.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The number of elements removed from the array.
     *
     * #### Notes
     * If `stop < start` the search will conceptually wrap at the end of
     * the array, however the array will be traversed front-to-back.
     *
     * #### Complexity
     * Linear.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * let data = [14, 12, 23, 39, 14, 12, 19, 14];
     * ArrayExt.removeAllOf(data, 12);        // 2
     * ArrayExt.removeAllOf(data, 17);        // 0
     * ArrayExt.removeAllOf(data, 14, 1, 4);  // 1
     * ```
     */
    function removeAllOf(array, value, start = 0, stop = -1) {
        let n = array.length;
        if (n === 0) {
            return 0;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        let count = 0;
        for (let i = 0; i < n; ++i) {
            if (start <= stop && i >= start && i <= stop && array[i] === value) {
                count++;
            }
            else if (stop < start &&
                (i <= stop || i >= start) &&
                array[i] === value) {
                count++;
            }
            else if (count > 0) {
                array[i - count] = array[i];
            }
        }
        if (count > 0) {
            array.length = n - count;
        }
        return count;
    }
    ArrayExt.removeAllOf = removeAllOf;
    /**
     * Remove the first occurrence of a value which matches a predicate.
     *
     * @param array - The array of interest.
     *
     * @param fn - The predicate function to apply to the values.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The removed `{ index, value }`, which will be `-1` and
     *   `undefined` if the value is not contained in the array.
     *
     * #### Notes
     * If `stop < start` the search will wrap at the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * function isEven(value: number): boolean {
     *   return value % 2 === 0;
     * }
     *
     * let data = [0, 12, 23, 39, 14, 12, 75];
     * ArrayExt.removeFirstWhere(data, isEven);     // { index: 0, value: 0 }
     * ArrayExt.removeFirstWhere(data, isEven, 2);  // { index: 3, value: 14 }
     * ArrayExt.removeFirstWhere(data, isEven, 4);  // { index: -1, value: undefined }
     * ```
     */
    function removeFirstWhere(array, fn, start = 0, stop = -1) {
        let value;
        let index = findFirstIndex(array, fn, start, stop);
        if (index !== -1) {
            value = removeAt(array, index);
        }
        return { index, value };
    }
    ArrayExt.removeFirstWhere = removeFirstWhere;
    /**
     * Remove the last occurrence of a value which matches a predicate.
     *
     * @param array - The array of interest.
     *
     * @param fn - The predicate function to apply to the values.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The removed `{ index, value }`, which will be `-1` and
     *   `undefined` if the value is not contained in the array.
     *
     * #### Notes
     * If `start < stop` the search will wrap at the end of the array.
     *
     * #### Complexity
     * Linear.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * function isEven(value: number): boolean {
     *   return value % 2 === 0;
     * }
     *
     * let data = [0, 12, 23, 39, 14, 12, 75];
     * ArrayExt.removeLastWhere(data, isEven);        // { index: 5, value: 12 }
     * ArrayExt.removeLastWhere(data, isEven, 2);     // { index: 1, value: 12 }
     * ArrayExt.removeLastWhere(data, isEven, 2, 1);  // { index: -1, value: undefined }
     * ```
     */
    function removeLastWhere(array, fn, start = -1, stop = 0) {
        let value;
        let index = findLastIndex(array, fn, start, stop);
        if (index !== -1) {
            value = removeAt(array, index);
        }
        return { index, value };
    }
    ArrayExt.removeLastWhere = removeLastWhere;
    /**
     * Remove all occurrences of values which match a predicate.
     *
     * @param array - The array of interest.
     *
     * @param fn - The predicate function to apply to the values.
     *
     * @param start - The index of the first element in the range to be
     *   searched, inclusive. The default value is `0`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @param stop - The index of the last element in the range to be
     *   searched, inclusive. The default value is `-1`. Negative values
     *   are taken as an offset from the end of the array.
     *
     * @returns The number of elements removed from the array.
     *
     * #### Notes
     * If `stop < start` the search will conceptually wrap at the end of
     * the array, however the array will be traversed front-to-back.
     *
     * #### Complexity
     * Linear.
     *
     * #### Example
     * ```typescript
     * import { ArrayExt } from '@lumino/algorithm';
     *
     * function isEven(value: number): boolean {
     *   return value % 2 === 0;
     * }
     *
     * function isNegative(value: number): boolean {
     *   return value < 0;
     * }
     *
     * let data = [0, 12, -13, -9, 23, 39, 14, -15, 12, 75];
     * ArrayExt.removeAllWhere(data, isEven);            // 4
     * ArrayExt.removeAllWhere(data, isNegative, 0, 3);  // 2
     * ```
     */
    function removeAllWhere(array, fn, start = 0, stop = -1) {
        let n = array.length;
        if (n === 0) {
            return 0;
        }
        if (start < 0) {
            start = Math.max(0, start + n);
        }
        else {
            start = Math.min(start, n - 1);
        }
        if (stop < 0) {
            stop = Math.max(0, stop + n);
        }
        else {
            stop = Math.min(stop, n - 1);
        }
        let count = 0;
        for (let i = 0; i < n; ++i) {
            if (start <= stop && i >= start && i <= stop && fn(array[i], i)) {
                count++;
            }
            else if (stop < start && (i <= stop || i >= start) && fn(array[i], i)) {
                count++;
            }
            else if (count > 0) {
                array[i - count] = array[i];
            }
        }
        if (count > 0) {
            array.length = n - count;
        }
        return count;
    }
    ArrayExt.removeAllWhere = removeAllWhere;
})(ArrayExt || (ArrayExt = {}));

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Chain together several iterables.
 *
 * @deprecated
 *
 * @param objects - The iterable objects of interest.
 *
 * @returns An iterator which yields the values of the iterables
 *   in the order in which they are supplied.
 *
 * #### Example
 * ```typescript
 * import { chain } from '@lumino/algorithm';
 *
 * let data1 = [1, 2, 3];
 * let data2 = [4, 5, 6];
 *
 * let stream = chain(data1, data2);
 *
 * Array.from(stream);  // [1, 2, 3, 4, 5, 6]
 * ```
 */
function* chain(...objects) {
    for (const object of objects) {
        yield* object;
    }
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Create an empty iterator.
 *
 * @returns A new iterator which yields nothing.
 *
 * #### Example
 * ```typescript
 * import { empty } from '@lumino/algorithm';
 *
 * let stream = empty<number>();
 *
 * Array.from(stream);  // []
 * ```
 */
// eslint-disable-next-line require-yield
function* empty() {
    return;
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Enumerate an iterable object.
 *
 * @param object - The iterable object of interest.
 *
 * @param start - The starting enum value. The default is `0`.
 *
 * @returns An iterator which yields the enumerated values.
 *
 * #### Example
 * ```typescript
 * import { enumerate } from '@lumino/algorithm';
 *
 * let data = ['foo', 'bar', 'baz'];
 *
 * let stream = enumerate(data, 1);
 *
 * Array.from(stream);  // [[1, 'foo'], [2, 'bar'], [3, 'baz']]
 * ```
 */
function* enumerate(object, start = 0) {
    for (const value of object) {
        yield [start++, value];
    }
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Filter an iterable for values which pass a test.
 *
 * @param object - The iterable object of interest.
 *
 * @param fn - The predicate function to invoke for each value.
 *
 * @returns An iterator which yields the values which pass the test.
 *
 * #### Example
 * ```typescript
 * import { filter } from '@lumino/algorithm';
 *
 * let data = [1, 2, 3, 4, 5, 6];
 *
 * let stream = filter(data, value => value % 2 === 0);
 *
 * Array.from(stream);  // [2, 4, 6]
 * ```
 */
function* filter(object, fn) {
    let index = 0;
    for (const value of object) {
        if (fn(value, index++)) {
            yield value;
        }
    }
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Find the first value in an iterable which matches a predicate.
 *
 * @param object - The iterable object to search.
 *
 * @param fn - The predicate function to apply to the values.
 *
 * @returns The first matching value, or `undefined` if no matching
 *   value is found.
 *
 * #### Complexity
 * Linear.
 *
 * #### Example
 * ```typescript
 * import { find } from '@lumino/algorithm';
 *
 * interface IAnimal { species: string, name: string };
 *
 * function isCat(value: IAnimal): boolean {
 *   return value.species === 'cat';
 * }
 *
 * let data: IAnimal[] = [
 *   { species: 'dog', name: 'spot' },
 *   { species: 'cat', name: 'fluffy' },
 *   { species: 'alligator', name: 'pocho' }
 * ];
 *
 * find(data, isCat).name;  // 'fluffy'
 * ```
 */
function find(object, fn) {
    let index = 0;
    for (const value of object) {
        if (fn(value, index++)) {
            return value;
        }
    }
    return undefined;
}
/**
 * Find the index of the first value which matches a predicate.
 *
 * @param object - The iterable object to search.
 *
 * @param fn - The predicate function to apply to the values.
 *
 * @returns The index of the first matching value, or `-1` if no
 *   matching value is found.
 *
 * #### Complexity
 * Linear.
 *
 * #### Example
 * ```typescript
 * import { findIndex } from '@lumino/algorithm';
 *
 * interface IAnimal { species: string, name: string };
 *
 * function isCat(value: IAnimal): boolean {
 *   return value.species === 'cat';
 * }
 *
 * let data: IAnimal[] = [
 *   { species: 'dog', name: 'spot' },
 *   { species: 'cat', name: 'fluffy' },
 *   { species: 'alligator', name: 'pocho' }
 * ];
 *
 * findIndex(data, isCat);  // 1
 * ```
 */
function findIndex(object, fn) {
    let index = 0;
    for (const value of object) {
        if (fn(value, index++)) {
            return index - 1;
        }
    }
    return -1;
}
/**
 * Find the minimum value in an iterable.
 *
 * @param object - The iterable object to search.
 *
 * @param fn - The 3-way comparison function to apply to the values.
 *   It should return `< 0` if the first value is less than the second.
 *   `0` if the values are equivalent, or `> 0` if the first value is
 *   greater than the second.
 *
 * @returns The minimum value in the iterable. If multiple values are
 *   equivalent to the minimum, the left-most value is returned. If
 *   the iterable is empty, this returns `undefined`.
 *
 * #### Complexity
 * Linear.
 *
 * #### Example
 * ```typescript
 * import { min } from '@lumino/algorithm';
 *
 * function numberCmp(a: number, b: number): number {
 *   return a - b;
 * }
 *
 * min([7, 4, 0, 3, 9, 4], numberCmp);  // 0
 * ```
 */
function min(object, fn) {
    let result = undefined;
    for (const value of object) {
        if (result === undefined) {
            result = value;
            continue;
        }
        if (fn(value, result) < 0) {
            result = value;
        }
    }
    return result;
}
/**
 * Find the maximum value in an iterable.
 *
 * @param object - The iterable object to search.
 *
 * @param fn - The 3-way comparison function to apply to the values.
 *   It should return `< 0` if the first value is less than the second.
 *   `0` if the values are equivalent, or `> 0` if the first value is
 *   greater than the second.
 *
 * @returns The maximum value in the iterable. If multiple values are
 *   equivalent to the maximum, the left-most value is returned. If
 *   the iterable is empty, this returns `undefined`.
 *
 * #### Complexity
 * Linear.
 *
 * #### Example
 * ```typescript
 * import { max } from '@lumino/algorithm';
 *
 * function numberCmp(a: number, b: number): number {
 *   return a - b;
 * }
 *
 * max([7, 4, 0, 3, 9, 4], numberCmp);  // 9
 * ```
 */
function max(object, fn) {
    let result = undefined;
    for (const value of object) {
        if (result === undefined) {
            result = value;
            continue;
        }
        if (fn(value, result) > 0) {
            result = value;
        }
    }
    return result;
}
/**
 * Find the minimum and maximum values in an iterable.
 *
 * @param object - The iterable object to search.
 *
 * @param fn - The 3-way comparison function to apply to the values.
 *   It should return `< 0` if the first value is less than the second.
 *   `0` if the values are equivalent, or `> 0` if the first value is
 *   greater than the second.
 *
 * @returns A 2-tuple of the `[min, max]` values in the iterable. If
 *   multiple values are equivalent, the left-most values are returned.
 *   If the iterable is empty, this returns `undefined`.
 *
 * #### Complexity
 * Linear.
 *
 * #### Example
 * ```typescript
 * import { minmax } from '@lumino/algorithm';
 *
 * function numberCmp(a: number, b: number): number {
 *   return a - b;
 * }
 *
 * minmax([7, 4, 0, 3, 9, 4], numberCmp);  // [0, 9]
 * ```
 */
function minmax(object, fn) {
    let empty = true;
    let vmin;
    let vmax;
    for (const value of object) {
        if (empty) {
            vmin = value;
            vmax = value;
            empty = false;
        }
        else if (fn(value, vmin) < 0) {
            vmin = value;
        }
        else if (fn(value, vmax) > 0) {
            vmax = value;
        }
    }
    return empty ? undefined : [vmin, vmax];
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Create an array from an iterable of values.
 *
 * @deprecated
 *
 * @param object - The iterable object of interest.
 *
 * @returns A new array of values from the given object.
 *
 * #### Example
 * ```typescript
 * import { toArray } from '@lumino/algorithm';
 *
 * let stream = [1, 2, 3, 4, 5, 6][Symbol.iterator]();
 *
 * toArray(stream);  // [1, 2, 3, 4, 5, 6];
 * ```
 */
function toArray(object) {
    return Array.from(object);
}
/**
 * Create an object from an iterable of key/value pairs.
 *
 * @param object - The iterable object of interest.
 *
 * @returns A new object mapping keys to values.
 *
 * #### Example
 * ```typescript
 * import { toObject } from '@lumino/algorithm';
 *
 * let data: [string, number][] = [['one', 1], ['two', 2], ['three', 3]];
 *
 * toObject(data);  // { one: 1, two: 2, three: 3 }
 * ```
 */
function toObject(object) {
    const result = {};
    for (const [key, value] of object) {
        result[key] = value;
    }
    return result;
}
/**
 * Invoke a function for each value in an iterable.
 *
 * @deprecated
 *
 * @param object - The iterable object of interest.
 *
 * @param fn - The callback function to invoke for each value.
 *
 * #### Notes
 * Iteration can be terminated early by returning `false` from the
 * callback function.
 *
 * #### Complexity
 * Linear.
 *
 * #### Example
 * ```typescript
 * import { each } from '@lumino/algorithm';
 *
 * let data = [5, 7, 0, -2, 9];
 *
 * each(data, value => { console.log(value); });
 * ```
 */
function each(object, fn) {
    let index = 0;
    for (const value of object) {
        if (false === fn(value, index++)) {
            return;
        }
    }
}
/**
 * Test whether all values in an iterable satisfy a predicate.
 *
 * @param object - The iterable object of interest.
 *
 * @param fn - The predicate function to invoke for each value.
 *
 * @returns `true` if all values pass the test, `false` otherwise.
 *
 * #### Notes
 * Iteration terminates on the first `false` predicate result.
 *
 * #### Complexity
 * Linear.
 *
 * #### Example
 * ```typescript
 * import { every } from '@lumino/algorithm';
 *
 * let data = [5, 7, 1];
 *
 * every(data, value => value % 2 === 0);  // false
 * every(data, value => value % 2 === 1);  // true
 * ```
 */
function every(object, fn) {
    let index = 0;
    for (const value of object) {
        if (false === fn(value, index++)) {
            return false;
        }
    }
    return true;
}
/**
 * Test whether any value in an iterable satisfies a predicate.
 *
 * @param object - The iterable object of interest.
 *
 * @param fn - The predicate function to invoke for each value.
 *
 * @returns `true` if any value passes the test, `false` otherwise.
 *
 * #### Notes
 * Iteration terminates on the first `true` predicate result.
 *
 * #### Complexity
 * Linear.
 *
 * #### Example
 * ```typescript
 * import { some } from '@lumino/algorithm';
 *
 * let data = [5, 7, 1];
 *
 * some(data, value => value === 7);  // true
 * some(data, value => value === 3);  // false
 * ```
 */
function some(object, fn) {
    let index = 0;
    for (const value of object) {
        if (fn(value, index++)) {
            return true;
        }
    }
    return false;
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Transform the values of an iterable with a mapping function.
 *
 * @param object - The iterable object of interest.
 *
 * @param fn - The mapping function to invoke for each value.
 *
 * @returns An iterator which yields the transformed values.
 *
 * #### Example
 * ```typescript
 * import { map } from '@lumino/algorithm';
 *
 * let data = [1, 2, 3];
 *
 * let stream = map(data, value => value * 2);
 *
 * Array.from(stream);  // [2, 4, 6]
 * ```
 */
function* map(object, fn) {
    let index = 0;
    for (const value of object) {
        yield fn(value, index++);
    }
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Create an iterator of evenly spaced values.
 *
 * @param start - The starting value for the range, inclusive.
 *
 * @param stop - The stopping value for the range, exclusive.
 *
 * @param step - The distance between each value.
 *
 * @returns An iterator which produces evenly spaced values.
 *
 * #### Notes
 * In the single argument form of `range(stop)`, `start` defaults to
 * `0` and `step` defaults to `1`.
 *
 * In the two argument form of `range(start, stop)`, `step` defaults
 * to `1`.
 *
 * #### Example
 * ```typescript
 * import { range } from '@lumino/algorithm';
 *
 * let stream = range(2, 4);
 *
 * Array.from(stream);  // [2, 3]
 * ```
 */
function* range(start, stop, step) {
    if (stop === undefined) {
        stop = start;
        start = 0;
        step = 1;
    }
    else if (step === undefined) {
        step = 1;
    }
    const length = Private.rangeLength(start, stop, step);
    for (let index = 0; index < length; index++) {
        yield start + step * index;
    }
}
/**
 * The namespace for the module implementation details.
 */
var Private;
(function (Private) {
    /**
     * Compute the effective length of a range.
     *
     * @param start - The starting value for the range, inclusive.
     *
     * @param stop - The stopping value for the range, exclusive.
     *
     * @param step - The distance between each value.
     *
     * @returns The number of steps need to traverse the range.
     */
    function rangeLength(start, stop, step) {
        if (step === 0) {
            return Infinity;
        }
        if (start > stop && step > 0) {
            return 0;
        }
        if (start < stop && step < 0) {
            return 0;
        }
        return Math.ceil((stop - start) / step);
    }
    Private.rangeLength = rangeLength;
})(Private || (Private = {}));

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
function reduce(object, fn, initial) {
    // Setup the iterator and fetch the first value.
    const it = object[Symbol.iterator]();
    let index = 0;
    let first = it.next();
    // An empty iterator and no initial value is an error.
    if (first.done && initial === undefined) {
        throw new TypeError('Reduce of empty iterable with no initial value.');
    }
    // If the iterator is empty, return the initial value.
    if (first.done) {
        return initial;
    }
    // If the iterator has a single item and no initial value, the
    // reducer is not invoked and the first item is the return value.
    let second = it.next();
    if (second.done && initial === undefined) {
        return first.value;
    }
    // If iterator has a single item and an initial value is provided,
    // the reducer is invoked and that result is the return value.
    if (second.done) {
        return fn(initial, first.value, index++);
    }
    // Setup the initial accumlated value.
    let accumulator;
    if (initial === undefined) {
        accumulator = fn(first.value, second.value, index++);
    }
    else {
        accumulator = fn(fn(initial, first.value, index++), second.value, index++);
    }
    // Iterate the rest of the values, updating the accumulator.
    let next;
    while (!(next = it.next()).done) {
        accumulator = fn(accumulator, next.value, index++);
    }
    // Return the final accumulated value.
    return accumulator;
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Create an iterator which repeats a value a number of times.
 *
 * @deprecated
 *
 * @param value - The value to repeat.
 *
 * @param count - The number of times to repeat the value.
 *
 * @returns A new iterator which repeats the specified value.
 *
 * #### Example
 * ```typescript
 * import { repeat } from '@lumino/algorithm';
 *
 * let stream = repeat(7, 3);
 *
 * Array.from(stream);  // [7, 7, 7]
 * ```
 */
function* repeat(value, count) {
    while (0 < count--) {
        yield value;
    }
}
/**
 * Create an iterator which yields a value a single time.
 *
 * @deprecated
 *
 * @param value - The value to wrap in an iterator.
 *
 * @returns A new iterator which yields the value a single time.
 *
 * #### Example
 * ```typescript
 * import { once } from '@lumino/algorithm';
 *
 * let stream = once(7);
 *
 * Array.from(stream);  // [7]
 * ```
 */
function* once(value) {
    yield value;
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Create an iterator for a retroable object.
 *
 * @param object - The retroable or array-like object of interest.
 *
 * @returns An iterator which traverses the object's values in reverse.
 *
 * #### Example
 * ```typescript
 * import { retro } from '@lumino/algorithm';
 *
 * let data = [1, 2, 3, 4, 5, 6];
 *
 * let stream = retro(data);
 *
 * Array.from(stream);  // [6, 5, 4, 3, 2, 1]
 * ```
 */
function* retro(object) {
    if (typeof object.retro === 'function') {
        yield* object.retro();
    }
    else {
        for (let index = object.length - 1; index > -1; index--) {
            yield object[index];
        }
    }
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Topologically sort an iterable of edges.
 *
 * @param edges - The iterable object of edges to sort.
 *   An edge is represented as a 2-tuple of `[fromNode, toNode]`.
 *
 * @returns The topologically sorted array of nodes.
 *
 * #### Notes
 * If a cycle is present in the graph, the cycle will be ignored and
 * the return value will be only approximately sorted.
 *
 * #### Example
 * ```typescript
 * import { topologicSort } from '@lumino/algorithm';
 *
 * let data = [
 *   ['d', 'e'],
 *   ['c', 'd'],
 *   ['a', 'b'],
 *   ['b', 'c']
 * ];
 *
 * topologicSort(data);  // ['a', 'b', 'c', 'd', 'e']
 * ```
 */
function topologicSort(edges) {
    // Setup the shared sorting state.
    let sorted = [];
    let visited = new Set();
    let graph = new Map();
    // Add the edges to the graph.
    for (const edge of edges) {
        addEdge(edge);
    }
    // Visit each node in the graph.
    for (const [k] of graph) {
        visit(k);
    }
    // Return the sorted results.
    return sorted;
    // Add an edge to the graph.
    function addEdge(edge) {
        let [fromNode, toNode] = edge;
        let children = graph.get(toNode);
        if (children) {
            children.push(fromNode);
        }
        else {
            graph.set(toNode, [fromNode]);
        }
    }
    // Recursively visit the node.
    function visit(node) {
        if (visited.has(node)) {
            return;
        }
        visited.add(node);
        let children = graph.get(node);
        if (children) {
            for (const child of children) {
                visit(child);
            }
        }
        sorted.push(node);
    }
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Iterate over an iterable using a stepped increment.
 *
 * @param object - The iterable object of interest.
 *
 * @param step - The distance to step on each iteration. A value
 *   of less than `1` will behave the same as a value of `1`.
 *
 * @returns An iterator which traverses the iterable step-wise.
 *
 * #### Example
 * ```typescript
 * import { stride } from '@lumino/algorithm';
 *
 * let data = [1, 2, 3, 4, 5, 6];
 *
 * let stream = stride(data, 2);
 *
 * Array.from(stream);  // [1, 3, 5];
 * ```
 */
function* stride(object, step) {
    let count = 0;
    for (const value of object) {
        if (0 === count++ % step) {
            yield value;
        }
    }
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * The namespace for string-specific algorithms.
 */
var StringExt;
(function (StringExt) {
    /**
     * Find the indices of characters in a source text.
     *
     * @param source - The source text which should be searched.
     *
     * @param query - The characters to locate in the source text.
     *
     * @param start - The index to start the search.
     *
     * @returns The matched indices, or `null` if there is no match.
     *
     * #### Complexity
     * Linear on `sourceText`.
     *
     * #### Notes
     * In order for there to be a match, all of the characters in `query`
     * **must** appear in `source` in the order given by `query`.
     *
     * Characters are matched using strict `===` equality.
     */
    function findIndices(source, query, start = 0) {
        let indices = new Array(query.length);
        for (let i = 0, j = start, n = query.length; i < n; ++i, ++j) {
            j = source.indexOf(query[i], j);
            if (j === -1) {
                return null;
            }
            indices[i] = j;
        }
        return indices;
    }
    StringExt.findIndices = findIndices;
    /**
     * A string matcher which uses a sum-of-squares algorithm.
     *
     * @param source - The source text which should be searched.
     *
     * @param query - The characters to locate in the source text.
     *
     * @param start - The index to start the search.
     *
     * @returns The match result, or `null` if there is no match.
     *   A lower `score` represents a stronger match.
     *
     * #### Complexity
     * Linear on `sourceText`.
     *
     * #### Notes
     * This scoring algorithm uses a sum-of-squares approach to determine
     * the score. In order for there to be a match, all of the characters
     * in `query` **must** appear in `source` in order. The index of each
     * matching character is squared and added to the score. This means
     * that early and consecutive character matches are preferred, while
     * late matches are heavily penalized.
     */
    function matchSumOfSquares(source, query, start = 0) {
        let indices = findIndices(source, query, start);
        if (!indices) {
            return null;
        }
        let score = 0;
        for (let i = 0, n = indices.length; i < n; ++i) {
            let j = indices[i] - start;
            score += j * j;
        }
        return { score, indices };
    }
    StringExt.matchSumOfSquares = matchSumOfSquares;
    /**
     * A string matcher which uses a sum-of-deltas algorithm.
     *
     * @param source - The source text which should be searched.
     *
     * @param query - The characters to locate in the source text.
     *
     * @param start - The index to start the search.
     *
     * @returns The match result, or `null` if there is no match.
     *   A lower `score` represents a stronger match.
     *
     * #### Complexity
     * Linear on `sourceText`.
     *
     * #### Notes
     * This scoring algorithm uses a sum-of-deltas approach to determine
     * the score. In order for there to be a match, all of the characters
     * in `query` **must** appear in `source` in order. The delta between
     * the indices are summed to create the score. This means that groups
     * of matched characters are preferred, while fragmented matches are
     * penalized.
     */
    function matchSumOfDeltas(source, query, start = 0) {
        let indices = findIndices(source, query, start);
        if (!indices) {
            return null;
        }
        let score = 0;
        let last = start - 1;
        for (let i = 0, n = indices.length; i < n; ++i) {
            let j = indices[i];
            score += j - last - 1;
            last = j;
        }
        return { score, indices };
    }
    StringExt.matchSumOfDeltas = matchSumOfDeltas;
    /**
     * Highlight the matched characters of a source text.
     *
     * @param source - The text which should be highlighted.
     *
     * @param indices - The indices of the matched characters. They must
     *   appear in increasing order and must be in bounds of the source.
     *
     * @param fn - The function to apply to the matched chunks.
     *
     * @returns An array of unmatched and highlighted chunks.
     */
    function highlight(source, indices, fn) {
        // Set up the result array.
        let result = [];
        // Set up the counter variables.
        let k = 0;
        let last = 0;
        let n = indices.length;
        // Iterator over each index.
        while (k < n) {
            // Set up the chunk indices.
            let i = indices[k];
            let j = indices[k];
            // Advance the right chunk index until it's non-contiguous.
            while (++k < n && indices[k] === j + 1) {
                j++;
            }
            // Extract the unmatched text.
            if (last < i) {
                result.push(source.slice(last, i));
            }
            // Extract and highlight the matched text.
            if (i < j + 1) {
                result.push(fn(source.slice(i, j + 1)));
            }
            // Update the last visited index.
            last = j + 1;
        }
        // Extract any remaining unmatched text.
        if (last < source.length) {
            result.push(source.slice(last));
        }
        // Return the highlighted result.
        return result;
    }
    StringExt.highlight = highlight;
    /**
     * A 3-way string comparison function.
     *
     * @param a - The first string of interest.
     *
     * @param b - The second string of interest.
     *
     * @returns `-1` if `a < b`, else `1` if `a > b`, else `0`.
     */
    function cmp(a, b) {
        return a < b ? -1 : a > b ? 1 : 0;
    }
    StringExt.cmp = cmp;
})(StringExt || (StringExt = {}));

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Take a fixed number of items from an iterable.
 *
 * @param object - The iterable object of interest.
 *
 * @param count - The number of items to take from the iterable.
 *
 * @returns An iterator which yields the specified number of items
 *   from the source iterable.
 *
 * #### Notes
 * The returned iterator will exhaust early if the source iterable
 * contains an insufficient number of items.
 *
 * #### Example
 * ```typescript
 * import { take } from '@lumino/algorithm';
 *
 * let stream = take([5, 4, 3, 2, 1, 0, -1], 3);
 *
 * Array.from(stream);  // [5, 4, 3]
 * ```
 */
function* take(object, count) {
    if (count < 1) {
        return;
    }
    const it = object[Symbol.iterator]();
    let item;
    while (0 < count-- && !(item = it.next()).done) {
        yield item.value;
    }
}

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * Iterate several iterables in lockstep.
 *
 * @param objects - The iterable objects of interest.
 *
 * @returns An iterator which yields successive tuples of values where
 *   each value is taken in turn from the provided iterables. It will
 *   be as long as the shortest provided iterable.
 *
 * #### Example
 * ```typescript
 * import { zip } from '@lumino/algorithm';
 *
 * let data1 = [1, 2, 3];
 * let data2 = [4, 5, 6];
 *
 * let stream = zip(data1, data2);
 *
 * Array.from(stream);  // [[1, 4], [2, 5], [3, 6]]
 * ```
 */
function* zip(...objects) {
    const iters = objects.map(obj => obj[Symbol.iterator]());
    let tuple = iters.map(it => it.next());
    for (; every(tuple, item => !item.done); tuple = iters.map(it => it.next())) {
        yield tuple.map(item => item.value);
    }
}


//# sourceMappingURL=index.es6.js.map


/***/ }),

/***/ 5764:
/***/ (function(__unused_webpack_module, exports, __webpack_require__) {

(function (global, factory) {
     true ? factory(exports, __webpack_require__(8135)) :
    0;
})(this, (function (exports, algorithm) { 'use strict';

    // Copyright (c) Jupyter Development Team.
    // Distributed under the terms of the Modified BSD License.
    /*-----------------------------------------------------------------------------
    | Copyright (c) 2014-2017, PhosphorJS Contributors
    |
    | Distributed under the terms of the BSD 3-Clause License.
    |
    | The full license is in the file LICENSE, distributed with this software.
    |----------------------------------------------------------------------------*/
    /**
     * The namespace for JSON-specific functions.
     */
    exports.JSONExt = void 0;
    (function (JSONExt) {
        /**
         * A shared frozen empty JSONObject
         */
        JSONExt.emptyObject = Object.freeze({});
        /**
         * A shared frozen empty JSONArray
         */
        JSONExt.emptyArray = Object.freeze([]);
        /**
         * Test whether a JSON value is a primitive.
         *
         * @param value - The JSON value of interest.
         *
         * @returns `true` if the value is a primitive,`false` otherwise.
         */
        function isPrimitive(value) {
            return (value === null ||
                typeof value === 'boolean' ||
                typeof value === 'number' ||
                typeof value === 'string');
        }
        JSONExt.isPrimitive = isPrimitive;
        function isArray(value) {
            return Array.isArray(value);
        }
        JSONExt.isArray = isArray;
        function isObject(value) {
            return !isPrimitive(value) && !isArray(value);
        }
        JSONExt.isObject = isObject;
        /**
         * Compare two JSON values for deep equality.
         *
         * @param first - The first JSON value of interest.
         *
         * @param second - The second JSON value of interest.
         *
         * @returns `true` if the values are equivalent, `false` otherwise.
         */
        function deepEqual(first, second) {
            // Check referential and primitive equality first.
            if (first === second) {
                return true;
            }
            // If one is a primitive, the `===` check ruled out the other.
            if (isPrimitive(first) || isPrimitive(second)) {
                return false;
            }
            // Test whether they are arrays.
            let a1 = isArray(first);
            let a2 = isArray(second);
            // Bail if the types are different.
            if (a1 !== a2) {
                return false;
            }
            // If they are both arrays, compare them.
            if (a1 && a2) {
                return deepArrayEqual(first, second);
            }
            // At this point, they must both be objects.
            return deepObjectEqual(first, second);
        }
        JSONExt.deepEqual = deepEqual;
        /**
         * Create a deep copy of a JSON value.
         *
         * @param value - The JSON value to copy.
         *
         * @returns A deep copy of the given JSON value.
         */
        function deepCopy(value) {
            // Do nothing for primitive values.
            if (isPrimitive(value)) {
                return value;
            }
            // Deep copy an array.
            if (isArray(value)) {
                return deepArrayCopy(value);
            }
            // Deep copy an object.
            return deepObjectCopy(value);
        }
        JSONExt.deepCopy = deepCopy;
        /**
         * Compare two JSON arrays for deep equality.
         */
        function deepArrayEqual(first, second) {
            // Check referential equality first.
            if (first === second) {
                return true;
            }
            // Test the arrays for equal length.
            if (first.length !== second.length) {
                return false;
            }
            // Compare the values for equality.
            for (let i = 0, n = first.length; i < n; ++i) {
                if (!deepEqual(first[i], second[i])) {
                    return false;
                }
            }
            // At this point, the arrays are equal.
            return true;
        }
        /**
         * Compare two JSON objects for deep equality.
         */
        function deepObjectEqual(first, second) {
            // Check referential equality first.
            if (first === second) {
                return true;
            }
            // Check for the first object's keys in the second object.
            for (let key in first) {
                if (first[key] !== undefined && !(key in second)) {
                    return false;
                }
            }
            // Check for the second object's keys in the first object.
            for (let key in second) {
                if (second[key] !== undefined && !(key in first)) {
                    return false;
                }
            }
            // Compare the values for equality.
            for (let key in first) {
                // Get the values.
                let firstValue = first[key];
                let secondValue = second[key];
                // If both are undefined, ignore the key.
                if (firstValue === undefined && secondValue === undefined) {
                    continue;
                }
                // If only one value is undefined, the objects are not equal.
                if (firstValue === undefined || secondValue === undefined) {
                    return false;
                }
                // Compare the values.
                if (!deepEqual(firstValue, secondValue)) {
                    return false;
                }
            }
            // At this point, the objects are equal.
            return true;
        }
        /**
         * Create a deep copy of a JSON array.
         */
        function deepArrayCopy(value) {
            let result = new Array(value.length);
            for (let i = 0, n = value.length; i < n; ++i) {
                result[i] = deepCopy(value[i]);
            }
            return result;
        }
        /**
         * Create a deep copy of a JSON object.
         */
        function deepObjectCopy(value) {
            let result = {};
            for (let key in value) {
                // Ignore undefined values.
                let subvalue = value[key];
                if (subvalue === undefined) {
                    continue;
                }
                result[key] = deepCopy(subvalue);
            }
            return result;
        }
    })(exports.JSONExt || (exports.JSONExt = {}));

    // Copyright (c) Jupyter Development Team.
    // Distributed under the terms of the Modified BSD License.
    /*-----------------------------------------------------------------------------
    | Copyright (c) 2014-2017, PhosphorJS Contributors
    |
    | Distributed under the terms of the BSD 3-Clause License.
    |
    | The full license is in the file LICENSE, distributed with this software.
    |----------------------------------------------------------------------------*/
    /**
     * An object which stores MIME data for general application use.
     *
     * #### Notes
     * This class does not attempt to enforce "correctness" of MIME types
     * and their associated data. Since this class is designed to transfer
     * arbitrary data and objects within the same application, it assumes
     * that the user provides correct and accurate data.
     */
    class MimeData {
        constructor() {
            this._types = [];
            this._values = [];
        }
        /**
         * Get an array of the MIME types contained within the dataset.
         *
         * @returns A new array of the MIME types, in order of insertion.
         */
        types() {
            return this._types.slice();
        }
        /**
         * Test whether the dataset has an entry for the given type.
         *
         * @param mime - The MIME type of interest.
         *
         * @returns `true` if the dataset contains a value for the given
         *   MIME type, `false` otherwise.
         */
        hasData(mime) {
            return this._types.indexOf(mime) !== -1;
        }
        /**
         * Get the data value for the given MIME type.
         *
         * @param mime - The MIME type of interest.
         *
         * @returns The value for the given MIME type, or `undefined` if
         *   the dataset does not contain a value for the type.
         */
        getData(mime) {
            let i = this._types.indexOf(mime);
            return i !== -1 ? this._values[i] : undefined;
        }
        /**
         * Set the data value for the given MIME type.
         *
         * @param mime - The MIME type of interest.
         *
         * @param data - The data value for the given MIME type.
         *
         * #### Notes
         * This will overwrite any previous entry for the MIME type.
         */
        setData(mime, data) {
            this.clearData(mime);
            this._types.push(mime);
            this._values.push(data);
        }
        /**
         * Remove the data entry for the given MIME type.
         *
         * @param mime - The MIME type of interest.
         *
         * #### Notes
         * This is a no-op if there is no entry for the given MIME type.
         */
        clearData(mime) {
            let i = this._types.indexOf(mime);
            if (i !== -1) {
                this._types.splice(i, 1);
                this._values.splice(i, 1);
            }
        }
        /**
         * Remove all data entries from the dataset.
         */
        clear() {
            this._types.length = 0;
            this._values.length = 0;
        }
    }

    // Copyright (c) Jupyter Development Team.
    // Distributed under the terms of the Modified BSD License.
    /**
     * Plugin registry.
     */
    class PluginRegistry {
        constructor(options = {}) {
            this._application = null;
            this._validatePlugin = () => true;
            this._plugins = new Map();
            this._services = new Map();
            if (options.validatePlugin) {
                console.info('Plugins may be rejected by the custom validation plugin method.');
                this._validatePlugin = options.validatePlugin;
            }
        }
        /**
         * The application object.
         *
         * It will be provided as first argument to the
         * plugins activation and deactivation functions.
         *
         * It can only be set once.
         *
         * By default, it is `null`.
         */
        get application() {
            return this._application;
        }
        set application(v) {
            if (this._application !== null) {
                throw Error('PluginRegistry.application is already set. It cannot be overridden.');
            }
            this._application = v;
        }
        /**
         * The list of all the deferred plugins.
         */
        get deferredPlugins() {
            return Array.from(this._plugins)
                .filter(([id, plugin]) => plugin.autoStart === 'defer')
                .map(([id, plugin]) => id);
        }
        /**
         * Get a plugin description.
         *
         * @param id - The ID of the plugin of interest.
         *
         * @returns The plugin description.
         */
        getPluginDescription(id) {
            var _a, _b;
            return (_b = (_a = this._plugins.get(id)) === null || _a === void 0 ? void 0 : _a.description) !== null && _b !== void 0 ? _b : '';
        }
        /**
         * Test whether a plugin is registered with the application.
         *
         * @param id - The ID of the plugin of interest.
         *
         * @returns `true` if the plugin is registered, `false` otherwise.
         */
        hasPlugin(id) {
            return this._plugins.has(id);
        }
        /**
         * Test whether a plugin is activated with the application.
         *
         * @param id - The ID of the plugin of interest.
         *
         * @returns `true` if the plugin is activated, `false` otherwise.
         */
        isPluginActivated(id) {
            var _a, _b;
            return (_b = (_a = this._plugins.get(id)) === null || _a === void 0 ? void 0 : _a.activated) !== null && _b !== void 0 ? _b : false;
        }
        /**
         * List the IDs of the plugins registered with the application.
         *
         * @returns A new array of the registered plugin IDs.
         */
        listPlugins() {
            return Array.from(this._plugins.keys());
        }
        /**
         * Register a plugin with the application.
         *
         * @param plugin - The plugin to register.
         *
         * #### Notes
         * An error will be thrown if a plugin with the same ID is already
         * registered, or if the plugin has a circular dependency.
         *
         * If the plugin provides a service which has already been provided
         * by another plugin, the new service will override the old service.
         */
        registerPlugin(plugin) {
            // Throw an error if the plugin ID is already registered.
            if (this._plugins.has(plugin.id)) {
                throw new TypeError(`Plugin '${plugin.id}' is already registered.`);
            }
            if (!this._validatePlugin(plugin)) {
                throw new Error(`Plugin '${plugin.id}' is not valid.`);
            }
            // Create the normalized plugin data.
            const data = Private.createPluginData(plugin);
            // Ensure the plugin does not cause a cyclic dependency.
            Private.ensureNoCycle(data, this._plugins, this._services);
            // Add the service token to the service map.
            if (data.provides) {
                this._services.set(data.provides, data.id);
            }
            // Add the plugin to the plugin map.
            this._plugins.set(data.id, data);
        }
        /**
         * Register multiple plugins with the application.
         *
         * @param plugins - The plugins to register.
         *
         * #### Notes
         * This calls `registerPlugin()` for each of the given plugins.
         */
        registerPlugins(plugins) {
            for (const plugin of plugins) {
                this.registerPlugin(plugin);
            }
        }
        /**
         * Deregister a plugin with the application.
         *
         * @param id - The ID of the plugin of interest.
         *
         * @param force - Whether to deregister the plugin even if it is active.
         */
        deregisterPlugin(id, force) {
            const plugin = this._plugins.get(id);
            if (!plugin) {
                return;
            }
            if (plugin.activated && !force) {
                throw new Error(`Plugin '${id}' is still active.`);
            }
            this._plugins.delete(id);
        }
        /**
         * Activate the plugin with the given ID.
         *
         * @param id - The ID of the plugin of interest.
         *
         * @returns A promise which resolves when the plugin is activated
         *   or rejects with an error if it cannot be activated.
         */
        async activatePlugin(id) {
            // Reject the promise if the plugin is not registered.
            const plugin = this._plugins.get(id);
            if (!plugin) {
                throw new ReferenceError(`Plugin '${id}' is not registered.`);
            }
            // Resolve immediately if the plugin is already activated.
            if (plugin.activated) {
                return;
            }
            // Return the pending resolver promise if it exists.
            if (plugin.promise) {
                return plugin.promise;
            }
            // Resolve the required services for the plugin.
            const required = plugin.requires.map(t => this.resolveRequiredService(t));
            // Resolve the optional services for the plugin.
            const optional = plugin.optional.map(t => this.resolveOptionalService(t));
            // Setup the resolver promise for the plugin.
            plugin.promise = Promise.all([...required, ...optional])
                .then(services => plugin.activate.apply(undefined, [this.application, ...services]))
                .then(service => {
                plugin.service = service;
                plugin.activated = true;
                plugin.promise = null;
            })
                .catch(error => {
                plugin.promise = null;
                throw error;
            });
            // Return the pending resolver promise.
            return plugin.promise;
        }
        /**
         * Activate all the deferred plugins.
         *
         * @returns A promise which will resolve when each plugin is activated
         * or rejects with an error if one cannot be activated.
         */
        async activatePlugins(kind, options = {}) {
            switch (kind) {
                case 'defer': {
                    const promises = this.deferredPlugins
                        .filter(pluginId => this._plugins.get(pluginId).autoStart)
                        .map(pluginId => {
                        return this.activatePlugin(pluginId);
                    });
                    await Promise.all(promises);
                    break;
                }
                case 'startUp': {
                    // Collect the ids of the startup plugins.
                    const startups = Private.collectStartupPlugins(this._plugins, options);
                    // Generate the activation promises.
                    const promises = startups.map(async (id) => {
                        try {
                            return await this.activatePlugin(id);
                        }
                        catch (error) {
                            console.error(`Plugin '${id}' failed to activate.`, error);
                        }
                    });
                    await Promise.all(promises);
                    break;
                }
            }
        }
        /**
         * Deactivate the plugin and its downstream dependents if and only if the
         * plugin and its dependents all support `deactivate`.
         *
         * @param id - The ID of the plugin of interest.
         *
         * @returns A list of IDs of downstream plugins deactivated with this one.
         */
        async deactivatePlugin(id) {
            // Reject the promise if the plugin is not registered.
            const plugin = this._plugins.get(id);
            if (!plugin) {
                throw new ReferenceError(`Plugin '${id}' is not registered.`);
            }
            // Bail early if the plugin is not activated.
            if (!plugin.activated) {
                return [];
            }
            // Check that this plugin can deactivate.
            if (!plugin.deactivate) {
                throw new TypeError(`Plugin '${id}'#deactivate() method missing`);
            }
            // Find the optimal deactivation order for plugins downstream of this one.
            const manifest = Private.findDependents(id, this._plugins, this._services);
            const downstream = manifest.map(id => this._plugins.get(id));
            // Check that all downstream plugins can deactivate.
            for (const plugin of downstream) {
                if (!plugin.deactivate) {
                    throw new TypeError(`Plugin ${plugin.id}#deactivate() method missing (depends on ${id})`);
                }
            }
            // Deactivate all downstream plugins.
            for (const plugin of downstream) {
                const services = [...plugin.requires, ...plugin.optional].map(service => {
                    const id = this._services.get(service);
                    return id ? this._plugins.get(id).service : null;
                });
                // Await deactivation so the next plugins only receive active services.
                await plugin.deactivate(this.application, ...services);
                plugin.service = null;
                plugin.activated = false;
            }
            // Remove plugin ID and return manifest of deactivated plugins.
            manifest.pop();
            return manifest;
        }
        /**
         * Resolve a required service of a given type.
         *
         * @param token - The token for the service type of interest.
         *
         * @returns A promise which resolves to an instance of the requested
         *   service, or rejects with an error if it cannot be resolved.
         *
         * #### Notes
         * Services are singletons. The same instance will be returned each
         * time a given service token is resolved.
         *
         * If the plugin which provides the service has not been activated,
         * resolving the service will automatically activate the plugin.
         *
         * User code will not typically call this method directly. Instead,
         * the required services for the user's plugins will be resolved
         * automatically when the plugin is activated.
         */
        async resolveRequiredService(token) {
            // Reject the promise if there is no provider for the type.
            const id = this._services.get(token);
            if (!id) {
                throw new TypeError(`No provider for: ${token.name}.`);
            }
            // Activate the plugin if necessary.
            const plugin = this._plugins.get(id);
            if (!plugin.activated) {
                await this.activatePlugin(id);
            }
            return plugin.service;
        }
        /**
         * Resolve an optional service of a given type.
         *
         * @param token - The token for the service type of interest.
         *
         * @returns A promise which resolves to an instance of the requested
         *   service, or `null` if it cannot be resolved.
         *
         * #### Notes
         * Services are singletons. The same instance will be returned each
         * time a given service token is resolved.
         *
         * If the plugin which provides the service has not been activated,
         * resolving the service will automatically activate the plugin.
         *
         * User code will not typically call this method directly. Instead,
         * the optional services for the user's plugins will be resolved
         * automatically when the plugin is activated.
         */
        async resolveOptionalService(token) {
            // Resolve with `null` if there is no provider for the type.
            const id = this._services.get(token);
            if (!id) {
                return null;
            }
            // Activate the plugin if necessary.
            const plugin = this._plugins.get(id);
            if (!plugin.activated) {
                try {
                    await this.activatePlugin(id);
                }
                catch (reason) {
                    console.error(reason);
                    return null;
                }
            }
            return plugin.service;
        }
    }
    /**
     * The namespace for the module implementation details.
     */
    var Private;
    (function (Private) {
        class PluginData {
            constructor(plugin) {
                var _a, _b, _c, _d;
                this._activated = false;
                this._promise = null;
                this._service = null;
                this.id = plugin.id;
                this.description = (_a = plugin.description) !== null && _a !== void 0 ? _a : '';
                this.activate = plugin.activate;
                this.deactivate = (_b = plugin.deactivate) !== null && _b !== void 0 ? _b : null;
                this.provides = (_c = plugin.provides) !== null && _c !== void 0 ? _c : null;
                this.autoStart = (_d = plugin.autoStart) !== null && _d !== void 0 ? _d : false;
                this.requires = plugin.requires ? plugin.requires.slice() : [];
                this.optional = plugin.optional ? plugin.optional.slice() : [];
            }
            /**
             * Whether the plugin has been activated.
             */
            get activated() {
                return this._activated;
            }
            set activated(a) {
                this._activated = a;
            }
            /**
             * The resolved service for the plugin, or `null`.
             */
            get service() {
                return this._service;
            }
            set service(s) {
                this._service = s;
            }
            /**
             * The pending resolver promise, or `null`.
             */
            get promise() {
                return this._promise;
            }
            set promise(p) {
                this._promise = p;
            }
        }
        /**
         * Create a normalized plugin data object for the given plugin.
         */
        function createPluginData(plugin) {
            return new PluginData(plugin);
        }
        Private.createPluginData = createPluginData;
        /**
         * Ensure no cycle is present in the plugin resolution graph.
         *
         * If a cycle is detected, an error will be thrown.
         */
        function ensureNoCycle(plugin, plugins, services) {
            const dependencies = [...plugin.requires, ...plugin.optional];
            const visit = (token) => {
                if (token === plugin.provides) {
                    return true;
                }
                const id = services.get(token);
                if (!id) {
                    return false;
                }
                const visited = plugins.get(id);
                const dependencies = [...visited.requires, ...visited.optional];
                if (dependencies.length === 0) {
                    return false;
                }
                trace.push(id);
                if (dependencies.some(visit)) {
                    return true;
                }
                trace.pop();
                return false;
            };
            // Bail early if there cannot be a cycle.
            if (!plugin.provides || dependencies.length === 0) {
                return;
            }
            // Setup a stack to trace service resolution.
            const trace = [plugin.id];
            // Throw an exception if a cycle is present.
            if (dependencies.some(visit)) {
                throw new ReferenceError(`Cycle detected: ${trace.join(' -> ')}.`);
            }
        }
        Private.ensureNoCycle = ensureNoCycle;
        /**
         * Find dependents in deactivation order.
         *
         * @param id - The ID of the plugin of interest.
         *
         * @param plugins - The map containing all plugins.
         *
         * @param services - The map containing all services.
         *
         * @returns A list of dependent plugin IDs in order of deactivation
         *
         * #### Notes
         * The final item of the returned list is always the plugin of interest.
         */
        function findDependents(id, plugins, services) {
            const edges = new Array();
            const add = (id) => {
                const plugin = plugins.get(id);
                // FIXME In the case of missing optional dependencies, we may consider
                // deactivating and reactivating the plugin without the missing service.
                const dependencies = [...plugin.requires, ...plugin.optional];
                edges.push(...dependencies.reduce((acc, dep) => {
                    const service = services.get(dep);
                    if (service) {
                        // An edge is oriented from dependent to provider.
                        acc.push([id, service]);
                    }
                    return acc;
                }, []));
            };
            for (const id of plugins.keys()) {
                add(id);
            }
            // Filter edges
            // - Get all packages that dependent on the package to be deactivated
            const newEdges = edges.filter(edge => edge[1] === id);
            let oldSize = 0;
            while (newEdges.length > oldSize) {
                const previousSize = newEdges.length;
                // Get all packages that dependent on packages that will be deactivated
                const packagesOfInterest = new Set(newEdges.map(edge => edge[0]));
                for (const poi of packagesOfInterest) {
                    edges
                        .filter(edge => edge[1] === poi)
                        .forEach(edge => {
                        // We check it is not already included to deal with circular dependencies
                        if (!newEdges.includes(edge)) {
                            newEdges.push(edge);
                        }
                    });
                }
                oldSize = previousSize;
            }
            const sorted = algorithm.topologicSort(newEdges);
            const index = sorted.findIndex(candidate => candidate === id);
            if (index === -1) {
                return [id];
            }
            return sorted.slice(0, index + 1);
        }
        Private.findDependents = findDependents;
        /**
         * Collect the IDs of the plugins to activate on startup.
         */
        function collectStartupPlugins(plugins, options) {
            // Create a set to hold the plugin IDs.
            const collection = new Set();
            // Collect the auto-start (non deferred) plugins.
            for (const id of plugins.keys()) {
                if (plugins.get(id).autoStart === true) {
                    collection.add(id);
                }
            }
            // Add the startup plugins.
            if (options.startPlugins) {
                for (const id of options.startPlugins) {
                    collection.add(id);
                }
            }
            // Remove the ignored plugins.
            if (options.ignorePlugins) {
                for (const id of options.ignorePlugins) {
                    collection.delete(id);
                }
            }
            // Return the collected startup plugins.
            return Array.from(collection);
        }
        Private.collectStartupPlugins = collectStartupPlugins;
    })(Private || (Private = {}));

    // Copyright (c) Jupyter Development Team.
    // Distributed under the terms of the Modified BSD License.
    /*-----------------------------------------------------------------------------
    | Copyright (c) 2014-2017, PhosphorJS Contributors
    |
    | Distributed under the terms of the BSD 3-Clause License.
    |
    | The full license is in the file LICENSE, distributed with this software.
    |----------------------------------------------------------------------------*/
    /**
     * A class which wraps a promise into a delegate object.
     *
     * #### Notes
     * This class is useful when the logic to resolve or reject a promise
     * cannot be defined at the point where the promise is created.
     */
    class PromiseDelegate {
        /**
         * Construct a new promise delegate.
         */
        constructor() {
            this.promise = new Promise((resolve, reject) => {
                this._resolve = resolve;
                this._reject = reject;
            });
        }
        /**
         * Resolve the wrapped promise with the given value.
         *
         * @param value - The value to use for resolving the promise.
         */
        resolve(value) {
            let resolve = this._resolve;
            resolve(value);
        }
        /**
         * Reject the wrapped promise with the given value.
         *
         * @reason - The reason for rejecting the promise.
         */
        reject(reason) {
            let reject = this._reject;
            reject(reason);
        }
    }

    // Copyright (c) Jupyter Development Team.
    // Distributed under the terms of the Modified BSD License.
    /*-----------------------------------------------------------------------------
    | Copyright (c) 2014-2017, PhosphorJS Contributors
    |
    | Distributed under the terms of the BSD 3-Clause License.
    |
    | The full license is in the file LICENSE, distributed with this software.
    |----------------------------------------------------------------------------*/
    /**
     * A runtime object which captures compile-time type information.
     *
     * #### Notes
     * A token captures the compile-time type of an interface or class in
     * an object which can be used at runtime in a type-safe fashion.
     */
    class Token {
        /**
         * Construct a new token.
         *
         * @param name - A human readable name for the token.
         * @param description - Token purpose description for documentation.
         */
        constructor(name, description) {
            this.name = name;
            this.description = description !== null && description !== void 0 ? description : '';
            this._tokenStructuralPropertyT = null;
        }
    }

    // Copyright (c) Jupyter Development Team.
    // Distributed under the terms of the Modified BSD License.
    /*-----------------------------------------------------------------------------
    | Copyright (c) 2014-2017, PhosphorJS Contributors
    |
    | Distributed under the terms of the BSD 3-Clause License.
    |
    | The full license is in the file LICENSE, distributed with this software.
    |----------------------------------------------------------------------------*/
    // Fallback
    function fallbackRandomValues(buffer) {
        let value = 0;
        for (let i = 0, n = buffer.length; i < n; ++i) {
            if (i % 4 === 0) {
                value = (Math.random() * 0xffffffff) >>> 0;
            }
            buffer[i] = value & 0xff;
            value >>>= 8;
        }
    }

    // Copyright (c) Jupyter Development Team.
    // Distributed under the terms of the Modified BSD License.
    /*-----------------------------------------------------------------------------
    | Copyright (c) 2014-2017, PhosphorJS Contributors
    |
    | Distributed under the terms of the BSD 3-Clause License.
    |
    | The full license is in the file LICENSE, distributed with this software.
    |----------------------------------------------------------------------------*/
    /**
     * The namespace for random number related functionality.
     */
    exports.Random = void 0;
    (function (Random) {
        /**
         * A function which generates random bytes.
         *
         * @param buffer - The `Uint8Array` to fill with random bytes.
         *
         * #### Notes
         * A cryptographically strong random number generator will be used if
         * available. Otherwise, `Math.random` will be used as a fallback for
         * randomness.
         *
         * The following RNGs are supported, listed in order of precedence:
         *   - `window.crypto.getRandomValues`
         *   - `window.msCrypto.getRandomValues`
         *   - `require('crypto').randomFillSync
         *   - `require('crypto').randomBytes
         *   - `Math.random`
         */
        Random.getRandomValues = (() => {
            // Look up the crypto module if available.
            const crypto = (typeof window !== 'undefined' && (window.crypto || window.msCrypto)) ||
                null;
            // Modern browsers and IE 11
            if (crypto && typeof crypto.getRandomValues === 'function') {
                return function getRandomValues(buffer) {
                    return crypto.getRandomValues(buffer);
                };
            }
            // Fallback
            return fallbackRandomValues;
        })();
    })(exports.Random || (exports.Random = {}));

    // Copyright (c) Jupyter Development Team.
    // Distributed under the terms of the Modified BSD License.
    /*-----------------------------------------------------------------------------
    | Copyright (c) 2014-2017, PhosphorJS Contributors
    |
    | Distributed under the terms of the BSD 3-Clause License.
    |
    | The full license is in the file LICENSE, distributed with this software.
    |----------------------------------------------------------------------------*/
    /**
     * A function which creates a function that generates UUID v4 identifiers.
     *
     * @returns A new function that creates a UUID v4 string.
     *
     * #### Notes
     * This implementation complies with RFC 4122.
     *
     * This uses `Random.getRandomValues()` for random bytes, which in
     * turn will use the underlying `crypto` module of the platform if
     * it is available. The fallback for randomness is `Math.random`.
     */
    function uuid4Factory(getRandomValues) {
        // Create a 16 byte array to hold the random values.
        const bytes = new Uint8Array(16);
        // Create a look up table from bytes to hex strings.
        const lut = new Array(256);
        // Pad the single character hex digits with a leading zero.
        for (let i = 0; i < 16; ++i) {
            lut[i] = '0' + i.toString(16);
        }
        // Populate the rest of the hex digits.
        for (let i = 16; i < 256; ++i) {
            lut[i] = i.toString(16);
        }
        // Return a function which generates the UUID.
        return function uuid4() {
            // Get a new batch of random values.
            getRandomValues(bytes);
            // Set the UUID version number to 4.
            bytes[6] = 0x40 | (bytes[6] & 0x0f);
            // Set the clock sequence bit to the RFC spec.
            bytes[8] = 0x80 | (bytes[8] & 0x3f);
            // Assemble the UUID string.
            return (lut[bytes[0]] +
                lut[bytes[1]] +
                lut[bytes[2]] +
                lut[bytes[3]] +
                '-' +
                lut[bytes[4]] +
                lut[bytes[5]] +
                '-' +
                lut[bytes[6]] +
                lut[bytes[7]] +
                '-' +
                lut[bytes[8]] +
                lut[bytes[9]] +
                '-' +
                lut[bytes[10]] +
                lut[bytes[11]] +
                lut[bytes[12]] +
                lut[bytes[13]] +
                lut[bytes[14]] +
                lut[bytes[15]]);
        };
    }

    // Copyright (c) Jupyter Development Team.
    // Distributed under the terms of the Modified BSD License.
    /*-----------------------------------------------------------------------------
    | Copyright (c) 2014-2017, PhosphorJS Contributors
    |
    | Distributed under the terms of the BSD 3-Clause License.
    |
    | The full license is in the file LICENSE, distributed with this software.
    |----------------------------------------------------------------------------*/
    /**
     * The namespace for UUID related functionality.
     */
    exports.UUID = void 0;
    (function (UUID) {
        /**
         * A function which generates UUID v4 identifiers.
         *
         * @returns A new UUID v4 string.
         *
         * #### Notes
         * This implementation complies with RFC 4122.
         *
         * This uses `Random.getRandomValues()` for random bytes, which in
         * turn will use the underlying `crypto` module of the platform if
         * it is available. The fallback for randomness is `Math.random`.
         */
        UUID.uuid4 = uuid4Factory(exports.Random.getRandomValues);
    })(exports.UUID || (exports.UUID = {}));

    exports.MimeData = MimeData;
    exports.PluginRegistry = PluginRegistry;
    exports.PromiseDelegate = PromiseDelegate;
    exports.Token = Token;

}));
//# sourceMappingURL=index.js.map


/***/ }),

/***/ 7556:
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   DisposableDelegate: () => (/* binding */ DisposableDelegate),
/* harmony export */   DisposableSet: () => (/* binding */ DisposableSet),
/* harmony export */   ObservableDisposableDelegate: () => (/* binding */ ObservableDisposableDelegate),
/* harmony export */   ObservableDisposableSet: () => (/* binding */ ObservableDisposableSet)
/* harmony export */ });
/* harmony import */ var _lumino_signaling__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(3992);


// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * @packageDocumentation
 * @module disposable
 */
/**
 * A disposable object which delegates to a callback function.
 */
class DisposableDelegate {
    /**
     * Construct a new disposable delegate.
     *
     * @param fn - The callback function to invoke on dispose.
     */
    constructor(fn) {
        this._fn = fn;
    }
    /**
     * Test whether the delegate has been disposed.
     */
    get isDisposed() {
        return !this._fn;
    }
    /**
     * Dispose of the delegate and invoke the callback function.
     */
    dispose() {
        if (!this._fn) {
            return;
        }
        let fn = this._fn;
        this._fn = null;
        fn();
    }
}
/**
 * An observable disposable object which delegates to a callback function.
 */
class ObservableDisposableDelegate extends DisposableDelegate {
    constructor() {
        super(...arguments);
        this._disposed = new _lumino_signaling__WEBPACK_IMPORTED_MODULE_0__.Signal(this);
    }
    /**
     * A signal emitted when the delegate is disposed.
     */
    get disposed() {
        return this._disposed;
    }
    /**
     * Dispose of the delegate and invoke the callback function.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        super.dispose();
        this._disposed.emit(undefined);
        _lumino_signaling__WEBPACK_IMPORTED_MODULE_0__.Signal.clearData(this);
    }
}
/**
 * An object which manages a collection of disposable items.
 */
class DisposableSet {
    constructor() {
        this._isDisposed = false;
        this._items = new Set();
    }
    /**
     * Test whether the set has been disposed.
     */
    get isDisposed() {
        return this._isDisposed;
    }
    /**
     * Dispose of the set and the items it contains.
     *
     * #### Notes
     * Items are disposed in the order they are added to the set.
     */
    dispose() {
        if (this._isDisposed) {
            return;
        }
        this._isDisposed = true;
        this._items.forEach(item => {
            item.dispose();
        });
        this._items.clear();
    }
    /**
     * Test whether the set contains a specific item.
     *
     * @param item - The item of interest.
     *
     * @returns `true` if the set contains the item, `false` otherwise.
     */
    contains(item) {
        return this._items.has(item);
    }
    /**
     * Add a disposable item to the set.
     *
     * @param item - The item to add to the set.
     *
     * #### Notes
     * If the item is already contained in the set, this is a no-op.
     */
    add(item) {
        this._items.add(item);
    }
    /**
     * Remove a disposable item from the set.
     *
     * @param item - The item to remove from the set.
     *
     * #### Notes
     * If the item is not contained in the set, this is a no-op.
     */
    remove(item) {
        this._items.delete(item);
    }
    /**
     * Remove all items from the set.
     */
    clear() {
        this._items.clear();
    }
}
/**
 * The namespace for the `DisposableSet` class statics.
 */
(function (DisposableSet) {
    /**
     * Create a disposable set from an iterable of items.
     *
     * @param items - The iterable object of interest.
     *
     * @returns A new disposable initialized with the given items.
     */
    function from(items) {
        let set = new DisposableSet();
        for (const item of items) {
            set.add(item);
        }
        return set;
    }
    DisposableSet.from = from;
})(DisposableSet || (DisposableSet = {}));
/**
 * An observable object which manages a collection of disposable items.
 */
class ObservableDisposableSet extends DisposableSet {
    constructor() {
        super(...arguments);
        this._disposed = new _lumino_signaling__WEBPACK_IMPORTED_MODULE_0__.Signal(this);
    }
    /**
     * A signal emitted when the set is disposed.
     */
    get disposed() {
        return this._disposed;
    }
    /**
     * Dispose of the set and the items it contains.
     *
     * #### Notes
     * Items are disposed in the order they are added to the set.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        super.dispose();
        this._disposed.emit(undefined);
        _lumino_signaling__WEBPACK_IMPORTED_MODULE_0__.Signal.clearData(this);
    }
}
/**
 * The namespace for the `ObservableDisposableSet` class statics.
 */
(function (ObservableDisposableSet) {
    /**
     * Create an observable disposable set from an iterable of items.
     *
     * @param items - The iterable object of interest.
     *
     * @returns A new disposable initialized with the given items.
     */
    function from(items) {
        let set = new ObservableDisposableSet();
        for (const item of items) {
            set.add(item);
        }
        return set;
    }
    ObservableDisposableSet.from = from;
})(ObservableDisposableSet || (ObservableDisposableSet = {}));


//# sourceMappingURL=index.es6.js.map


/***/ }),

/***/ 6049:
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   Debouncer: () => (/* binding */ Debouncer),
/* harmony export */   Poll: () => (/* binding */ Poll),
/* harmony export */   RateLimiter: () => (/* binding */ RateLimiter),
/* harmony export */   Throttler: () => (/* binding */ Throttler)
/* harmony export */ });
/* harmony import */ var _lumino_coreutils__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(5764);
/* harmony import */ var _lumino_coreutils__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_lumino_coreutils__WEBPACK_IMPORTED_MODULE_0__);
/* harmony import */ var _lumino_signaling__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(3992);



// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/**
 * A class that wraps an asynchronous function to poll at a regular interval
 * with exponential increases to the interval length if the poll fails.
 *
 * @typeparam T - The resolved type of the factory's promises.
 * Defaults to `any`.
 *
 * @typeparam U - The rejected type of the factory's promises.
 * Defaults to `any`.
 *
 * @typeparam V - An optional type to extend the phases supported by a poll.
 * Defaults to `standby`, which already exists in the `Phase` type.
 */
class Poll {
    /**
     * Instantiate a new poll with exponential backoff in case of failure.
     *
     * @param options - The poll instantiation options.
     */
    constructor(options) {
        var _a;
        this._disposed = new _lumino_signaling__WEBPACK_IMPORTED_MODULE_1__.Signal(this);
        this._lingered = 0;
        this._tick = new _lumino_coreutils__WEBPACK_IMPORTED_MODULE_0__.PromiseDelegate();
        this._ticked = new _lumino_signaling__WEBPACK_IMPORTED_MODULE_1__.Signal(this);
        this._factory = options.factory;
        this._linger = (_a = options.linger) !== null && _a !== void 0 ? _a : Private.DEFAULT_LINGER;
        this._standby = options.standby || Private.DEFAULT_STANDBY;
        this._state = { ...Private.DEFAULT_STATE, timestamp: new Date().getTime() };
        // Normalize poll frequency `max` to be the greater of
        // default `max`, `options.frequency.max`, or `options.frequency.interval`.
        const frequency = options.frequency || {};
        const max = Math.max(frequency.interval || 0, frequency.max || 0, Private.DEFAULT_FREQUENCY.max);
        this.frequency = { ...Private.DEFAULT_FREQUENCY, ...frequency, ...{ max } };
        this.name = options.name || Private.DEFAULT_NAME;
        if ('auto' in options ? options.auto : true) {
            setTimeout(() => this.start());
        }
    }
    /**
     * A signal emitted when the poll is disposed.
     */
    get disposed() {
        return this._disposed;
    }
    /**
     * The polling frequency parameters.
     */
    get frequency() {
        return this._frequency;
    }
    set frequency(frequency) {
        if (this.isDisposed || _lumino_coreutils__WEBPACK_IMPORTED_MODULE_0__.JSONExt.deepEqual(frequency, this.frequency || {})) {
            return;
        }
        let { backoff, interval, max } = frequency;
        interval = Math.round(interval);
        max = Math.round(max);
        if (typeof backoff === 'number' && backoff < 1) {
            throw new Error('Poll backoff growth factor must be at least 1');
        }
        if ((interval < 0 || interval > max) && interval !== Poll.NEVER) {
            throw new Error('Poll interval must be between 0 and max');
        }
        if (max > Poll.MAX_INTERVAL && max !== Poll.NEVER) {
            throw new Error(`Max interval must be less than ${Poll.MAX_INTERVAL}`);
        }
        this._frequency = { backoff, interval, max };
    }
    /**
     * Whether the poll is disposed.
     */
    get isDisposed() {
        return this.state.phase === 'disposed';
    }
    /**
     * Indicates when the poll switches to standby.
     */
    get standby() {
        return this._standby;
    }
    set standby(standby) {
        if (this.isDisposed || this.standby === standby) {
            return;
        }
        this._standby = standby;
    }
    /**
     * The poll state, which is the content of the current poll tick.
     */
    get state() {
        return this._state;
    }
    /**
     * A promise that resolves when the poll next ticks.
     */
    get tick() {
        return this._tick.promise;
    }
    /**
     * A signal emitted when the poll ticks and fires off a new request.
     */
    get ticked() {
        return this._ticked;
    }
    /**
     * Return an async iterator that yields every tick.
     */
    async *[Symbol.asyncIterator]() {
        while (!this.isDisposed) {
            yield this.state;
            await this.tick.catch(() => undefined);
        }
    }
    /**
     * Dispose the poll.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this._state = {
            ...Private.DISPOSED_STATE,
            timestamp: new Date().getTime()
        };
        this._tick.promise.catch(_ => undefined);
        this._tick.reject(new Error(`Poll (${this.name}) is disposed.`));
        this._disposed.emit(undefined);
        _lumino_signaling__WEBPACK_IMPORTED_MODULE_1__.Signal.clearData(this);
    }
    /**
     * Refreshes the poll. Schedules `refreshed` tick if necessary.
     *
     * @returns A promise that resolves after tick is scheduled and never rejects.
     *
     * #### Notes
     * The returned promise resolves after the tick is scheduled, but before
     * the polling action is run. To wait until after the poll action executes,
     * await the `poll.tick` promise: `await poll.refresh(); await poll.tick;`
     */
    refresh() {
        return this.schedule({
            cancel: ({ phase }) => phase === 'refreshed',
            interval: Poll.IMMEDIATE,
            phase: 'refreshed'
        });
    }
    /**
     * Schedule the next poll tick.
     *
     * @param next - The next poll state data to schedule. Defaults to standby.
     *
     * @param next.cancel - Cancels state transition if function returns `true`.
     *
     * @returns A promise that resolves when the next poll state is active.
     *
     * #### Notes
     * This method is not meant to be invoked by user code typically. It is public
     * to allow poll instances to be composed into classes that schedule ticks.
     */
    async schedule(next = {}) {
        if (this.isDisposed) {
            return;
        }
        // Check if the phase transition should be canceled.
        if (next.cancel && next.cancel(this.state)) {
            return;
        }
        // Update poll state.
        const pending = this._tick;
        const scheduled = new _lumino_coreutils__WEBPACK_IMPORTED_MODULE_0__.PromiseDelegate();
        const state = {
            interval: this.frequency.interval,
            payload: null,
            phase: 'standby',
            timestamp: new Date().getTime(),
            ...next
        };
        this._state = state;
        this._tick = scheduled;
        // Clear the schedule if possible.
        clearTimeout(this._timeout);
        // Emit ticked signal, resolve pending promise, and await its settlement.
        this._ticked.emit(this.state);
        pending.resolve(this);
        await pending.promise;
        if (state.interval === Poll.NEVER) {
            this._timeout = undefined;
            return;
        }
        // Schedule next execution and cache its timeout handle.
        const execute = () => {
            if (this.isDisposed || this.tick !== scheduled.promise) {
                return;
            }
            this._execute();
        };
        // Cache the handle in case it needs to be unscheduled.
        this._timeout = setTimeout(execute, state.interval);
    }
    /**
     * Starts the poll. Schedules `started` tick if necessary.
     *
     * @returns A promise that resolves after tick is scheduled and never rejects.
     */
    start() {
        return this.schedule({
            cancel: ({ phase }) => phase !== 'constructed' && phase !== 'standby' && phase !== 'stopped',
            interval: Poll.IMMEDIATE,
            phase: 'started'
        });
    }
    /**
     * Stops the poll. Schedules `stopped` tick if necessary.
     *
     * @returns A promise that resolves after tick is scheduled and never rejects.
     */
    stop() {
        return this.schedule({
            cancel: ({ phase }) => phase === 'stopped',
            interval: Poll.NEVER,
            phase: 'stopped'
        });
    }
    /**
     * Whether the poll is hidden.
     *
     * #### Notes
     * This property is only relevant in a browser context.
     */
    get hidden() {
        return Private.hidden;
    }
    /**
     * Execute a new poll factory promise or stand by if necessary.
     */
    _execute() {
        let standby = typeof this.standby === 'function' ? this.standby() : this.standby;
        // Check if execution should proceed, linger, or stand by.
        if (standby === 'never') {
            standby = false;
        }
        else if (standby === 'when-hidden') {
            if (this.hidden) {
                standby = ++this._lingered > this._linger;
            }
            else {
                this._lingered = 0;
                standby = false;
            }
        }
        // If in standby mode schedule next tick without calling the factory.
        if (standby) {
            void this.schedule();
            return;
        }
        const pending = this.tick;
        this._factory(this.state)
            .then((resolved) => {
            if (this.isDisposed || this.tick !== pending) {
                return;
            }
            void this.schedule({
                payload: resolved,
                phase: this.state.phase === 'rejected' ? 'reconnected' : 'resolved'
            });
        })
            .catch((rejected) => {
            if (this.isDisposed || this.tick !== pending) {
                return;
            }
            void this.schedule({
                interval: Private.sleep(this.frequency, this.state),
                payload: rejected,
                phase: 'rejected'
            });
        });
    }
}
/**
 * A namespace for `Poll` types, interfaces, and statics.
 */
(function (Poll) {
    /**
     * An interval value in ms that indicates the poll should tick immediately.
     */
    Poll.IMMEDIATE = 0;
    /**
     * Delays are 32-bit integers in many browsers so intervals need to be capped.
     *
     * #### Notes
     * https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setTimeout#Maximum_delay_value
     */
    Poll.MAX_INTERVAL = 2147483647;
    /**
     * An interval value that indicates the poll should never tick.
     */
    Poll.NEVER = Infinity;
})(Poll || (Poll = {}));
/**
 * A namespace for private module data.
 */
var Private;
(function (Private) {
    /**
     * The default backoff growth rate if `backoff` is `true`.
     */
    Private.DEFAULT_BACKOFF = 3;
    /**
     * The default polling frequency.
     */
    Private.DEFAULT_FREQUENCY = {
        backoff: true,
        interval: 1000,
        max: 30 * 1000
    };
    /**
     * The default number of times to `linger` when a poll is hidden.
     */
    Private.DEFAULT_LINGER = 1;
    /**
     * The default poll name.
     */
    Private.DEFAULT_NAME = 'unknown';
    /**
     * The default poll standby behavior.
     */
    Private.DEFAULT_STANDBY = 'when-hidden';
    /**
     * The first poll tick state's default values superseded in constructor.
     */
    Private.DEFAULT_STATE = {
        interval: Poll.NEVER,
        payload: null,
        phase: 'constructed',
        timestamp: new Date(0).getTime()
    };
    /**
     * The disposed tick state values.
     */
    Private.DISPOSED_STATE = {
        interval: Poll.NEVER,
        payload: null,
        phase: 'disposed',
        timestamp: new Date(0).getTime()
    };
    /**
     * Returns the number of milliseconds to sleep before the next tick.
     *
     * @param frequency - The poll's base frequency.
     * @param last - The poll's last tick.
     */
    function sleep(frequency, last) {
        const { backoff, interval, max } = frequency;
        if (interval === Poll.NEVER) {
            return interval;
        }
        const growth = backoff === true ? Private.DEFAULT_BACKOFF : backoff === false ? 1 : backoff;
        const random = getRandomIntInclusive(interval, last.interval * growth);
        return Math.min(max, random);
    }
    Private.sleep = sleep;
    /**
     * Keep track of whether the document is hidden. This flag is only relevant in
     * a browser context.
     *
     * Listen to `visibilitychange` event to set the `hidden` flag.
     *
     * Listening to `pagehide` is also necessary because Safari support for
     * `visibilitychange` events is partial, cf.
     * https://developer.mozilla.org/docs/Web/API/Document/visibilitychange_event
     */
    Private.hidden = (() => {
        if (typeof document === 'undefined') {
            return false;
        }
        document.addEventListener('visibilitychange', () => {
            Private.hidden = document.visibilityState === 'hidden';
        });
        document.addEventListener('pagehide', () => {
            Private.hidden = document.visibilityState === 'hidden';
        });
        return document.visibilityState === 'hidden';
    })();
    /**
     * Get a random integer between min and max, inclusive of both.
     *
     * #### Notes
     * From
     * https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Math/random#Getting_a_random_integer_between_two_values_inclusive
     *
     * From the MDN page: It might be tempting to use Math.round() to accomplish
     * that, but doing so would cause your random numbers to follow a non-uniform
     * distribution, which may not be acceptable for your needs.
     */
    function getRandomIntInclusive(min, max) {
        min = Math.ceil(min);
        max = Math.floor(max);
        return Math.floor(Math.random() * (max - min + 1)) + min;
    }
})(Private || (Private = {}));

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/**
 * A base class to implement rate limiters with different invocation strategies.
 *
 * @typeparam T - The resolved type of the underlying function.
 *
 * @typeparam U - The rejected type of the underlying function.
 *
 * @typeparam V - Arguments for the underlying function.
 */
class RateLimiter {
    /**
     * Instantiate a rate limiter.
     *
     * @param fn - The function to rate limit.
     *
     * @param limit - The rate limit; defaults to 500ms.
     */
    constructor(fn, limit = 500) {
        /**
         * Arguments for the underlying function.
         */
        this.args = undefined;
        /**
         * A promise that resolves on each successful invocation.
         */
        this.payload = null;
        this.limit = limit;
        this.poll = new Poll({
            auto: false,
            factory: async () => {
                const { args } = this;
                this.args = undefined;
                return fn(...args);
            },
            frequency: { backoff: false, interval: Poll.NEVER, max: Poll.NEVER },
            standby: 'never'
        });
        this.payload = new _lumino_coreutils__WEBPACK_IMPORTED_MODULE_0__.PromiseDelegate();
        this.poll.ticked.connect((_, state) => {
            const { payload } = this;
            if (state.phase === 'resolved') {
                this.payload = new _lumino_coreutils__WEBPACK_IMPORTED_MODULE_0__.PromiseDelegate();
                payload.resolve(state.payload);
                return;
            }
            if (state.phase === 'rejected' || state.phase === 'stopped') {
                this.payload = new _lumino_coreutils__WEBPACK_IMPORTED_MODULE_0__.PromiseDelegate();
                payload.promise.catch(_ => undefined);
                payload.reject(state.payload);
                return;
            }
        }, this);
    }
    /**
     * Whether the rate limiter is disposed.
     */
    get isDisposed() {
        return this.payload === null;
    }
    /**
     * Disposes the rate limiter.
     */
    dispose() {
        if (this.isDisposed) {
            return;
        }
        this.args = undefined;
        this.payload = null;
        this.poll.dispose();
    }
    /**
     * Stop the function if it is mid-flight.
     */
    async stop() {
        return this.poll.stop();
    }
}
/**
 * Wraps and debounces a function that can be called multiple times and only
 * executes the underlying function one `interval` after the last invocation.
 *
 * @typeparam T - The resolved type of the underlying function. Defaults to any.
 *
 * @typeparam U - The rejected type of the underlying function. Defaults to any.
 *
 * @typeparam V - Arguments for the underlying function. Defaults to any[].
 */
class Debouncer extends RateLimiter {
    /**
     * Invokes the function and only executes after rate limit has elapsed.
     * Each invocation resets the timer.
     */
    invoke(...args) {
        this.args = args;
        void this.poll.schedule({ interval: this.limit, phase: 'invoked' });
        return this.payload.promise;
    }
}
/**
 * Wraps and throttles a function that can be called multiple times and only
 * executes the underlying function once per `interval`.
 *
 * @typeparam T - The resolved type of the underlying function. Defaults to any.
 *
 * @typeparam U - The rejected type of the underlying function. Defaults to any.
 *
 * @typeparam V - Arguments for the underlying function. Defaults to any[].
 */
class Throttler extends RateLimiter {
    /**
     * Instantiate a throttler.
     *
     * @param fn - The function being throttled.
     *
     * @param options - Throttling configuration or throttling limit in ms.
     *
     * #### Notes
     * The `edge` defaults to `leading`; the `limit` defaults to `500`.
     */
    constructor(fn, options) {
        super(fn, typeof options === 'number' ? options : options && options.limit);
        this._trailing = false;
        if (typeof options !== 'number' && options && options.edge === 'trailing') {
            this._trailing = true;
        }
        this._interval = this._trailing ? this.limit : Poll.IMMEDIATE;
    }
    /**
     * Throttles function invocations if one is currently in flight.
     */
    invoke(...args) {
        const idle = this.poll.state.phase !== 'invoked';
        if (idle || this._trailing) {
            this.args = args;
        }
        if (idle) {
            void this.poll.schedule({ interval: this._interval, phase: 'invoked' });
        }
        return this.payload.promise;
    }
}


//# sourceMappingURL=index.es6.js.map


/***/ }),

/***/ 6573:
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   AttachedProperty: () => (/* binding */ AttachedProperty)
/* harmony export */ });
// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * @packageDocumentation
 * @module properties
 */
/**
 * A class which attaches a value to an external object.
 *
 * #### Notes
 * Attached properties are used to extend the state of an object with
 * semantic data from an unrelated class. They also encapsulate value
 * creation, coercion, and notification.
 *
 * Because attached property values are stored in a hash table, which
 * in turn is stored in a WeakMap keyed on the owner object, there is
 * non-trivial storage overhead involved in their use. The pattern is
 * therefore best used for the storage of rare data.
 */
class AttachedProperty {
    /**
     * Construct a new attached property.
     *
     * @param options - The options for initializing the property.
     */
    constructor(options) {
        this._pid = Private.nextPID();
        this.name = options.name;
        this._create = options.create;
        this._coerce = options.coerce || null;
        this._compare = options.compare || null;
        this._changed = options.changed || null;
    }
    /**
     * Get the current value of the property for a given owner.
     *
     * @param owner - The property owner of interest.
     *
     * @returns The current value of the property.
     *
     * #### Notes
     * If the value has not yet been set, the default value will be
     * computed and assigned as the current value of the property.
     */
    get(owner) {
        let value;
        let map = Private.ensureMap(owner);
        if (this._pid in map) {
            value = map[this._pid];
        }
        else {
            value = map[this._pid] = this._createValue(owner);
        }
        return value;
    }
    /**
     * Set the current value of the property for a given owner.
     *
     * @param owner - The property owner of interest.
     *
     * @param value - The value for the property.
     *
     * #### Notes
     * If the value has not yet been set, the default value will be
     * computed and used as the previous value for the comparison.
     */
    set(owner, value) {
        let oldValue;
        let map = Private.ensureMap(owner);
        if (this._pid in map) {
            oldValue = map[this._pid];
        }
        else {
            oldValue = map[this._pid] = this._createValue(owner);
        }
        let newValue = this._coerceValue(owner, value);
        this._maybeNotify(owner, oldValue, (map[this._pid] = newValue));
    }
    /**
     * Explicitly coerce the current property value for a given owner.
     *
     * @param owner - The property owner of interest.
     *
     * #### Notes
     * If the value has not yet been set, the default value will be
     * computed and used as the previous value for the comparison.
     */
    coerce(owner) {
        let oldValue;
        let map = Private.ensureMap(owner);
        if (this._pid in map) {
            oldValue = map[this._pid];
        }
        else {
            oldValue = map[this._pid] = this._createValue(owner);
        }
        let newValue = this._coerceValue(owner, oldValue);
        this._maybeNotify(owner, oldValue, (map[this._pid] = newValue));
    }
    /**
     * Get or create the default value for the given owner.
     */
    _createValue(owner) {
        let create = this._create;
        return create(owner);
    }
    /**
     * Coerce the value for the given owner.
     */
    _coerceValue(owner, value) {
        let coerce = this._coerce;
        return coerce ? coerce(owner, value) : value;
    }
    /**
     * Compare the old value and new value for equality.
     */
    _compareValue(oldValue, newValue) {
        let compare = this._compare;
        return compare ? compare(oldValue, newValue) : oldValue === newValue;
    }
    /**
     * Run the change notification if the given values are different.
     */
    _maybeNotify(owner, oldValue, newValue) {
        let changed = this._changed;
        if (changed && !this._compareValue(oldValue, newValue)) {
            changed(owner, oldValue, newValue);
        }
    }
}
/**
 * The namespace for the `AttachedProperty` class statics.
 */
(function (AttachedProperty) {
    /**
     * Clear the stored property data for the given owner.
     *
     * @param owner - The property owner of interest.
     *
     * #### Notes
     * This will clear all property values for the owner, but it will
     * **not** run the change notification for any of the properties.
     */
    function clearData(owner) {
        Private.ownerData.delete(owner);
    }
    AttachedProperty.clearData = clearData;
})(AttachedProperty || (AttachedProperty = {}));
/**
 * The namespace for the module implementation details.
 */
var Private;
(function (Private) {
    /**
     * A weak mapping of property owner to property map.
     */
    Private.ownerData = new WeakMap();
    /**
     * A function which computes successive unique property ids.
     */
    Private.nextPID = (() => {
        let id = 0;
        return () => {
            let rand = Math.random();
            let stem = `${rand}`.slice(2);
            return `pid-${stem}-${id++}`;
        };
    })();
    /**
     * Lookup the data map for the property owner.
     *
     * This will create the map if one does not already exist.
     */
    function ensureMap(owner) {
        let map = Private.ownerData.get(owner);
        if (map) {
            return map;
        }
        map = Object.create(null);
        Private.ownerData.set(owner, map);
        return map;
    }
    Private.ensureMap = ensureMap;
})(Private || (Private = {}));


//# sourceMappingURL=index.es6.js.map


/***/ }),

/***/ 3992:
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   Signal: () => (/* binding */ Signal),
/* harmony export */   Stream: () => (/* binding */ Stream)
/* harmony export */ });
/* harmony import */ var _lumino_algorithm__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(8135);
/* harmony import */ var _lumino_coreutils__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(5764);
/* harmony import */ var _lumino_coreutils__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(_lumino_coreutils__WEBPACK_IMPORTED_MODULE_1__);



// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/*-----------------------------------------------------------------------------
| Copyright (c) 2014-2017, PhosphorJS Contributors
|
| Distributed under the terms of the BSD 3-Clause License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
/**
 * @packageDocumentation
 * @module signaling
 */
/**
 * A concrete implementation of `ISignal`.
 *
 * #### Example
 * ```typescript
 * import { ISignal, Signal } from '@lumino/signaling';
 *
 * class SomeClass {
 *
 *   constructor(name: string) {
 *     this.name = name;
 *   }
 *
 *   readonly name: string;
 *
 *   get valueChanged: ISignal<this, number> {
 *     return this._valueChanged;
 *   }
 *
 *   get value(): number {
 *     return this._value;
 *   }
 *
 *   set value(value: number) {
 *     if (value === this._value) {
 *       return;
 *     }
 *     this._value = value;
 *     this._valueChanged.emit(value);
 *   }
 *
 *   private _value = 0;
 *   private _valueChanged = new Signal<this, number>(this);
 * }
 *
 * function logger(sender: SomeClass, value: number): void {
 *   console.log(sender.name, value);
 * }
 *
 * let m1 = new SomeClass('foo');
 * let m2 = new SomeClass('bar');
 *
 * m1.valueChanged.connect(logger);
 * m2.valueChanged.connect(logger);
 *
 * m1.value = 42;  // logs: foo 42
 * m2.value = 17;  // logs: bar 17
 * ```
 */
class Signal {
    /**
     * Construct a new signal.
     *
     * @param sender - The sender which owns the signal.
     */
    constructor(sender) {
        this.sender = sender;
    }
    /**
     * Connect a slot to the signal.
     *
     * @param slot - The slot to invoke when the signal is emitted.
     *
     * @param thisArg - The `this` context for the slot. If provided,
     *   this must be a non-primitive object.
     *
     * @returns `true` if the connection succeeds, `false` otherwise.
     */
    connect(slot, thisArg) {
        return Private.connect(this, slot, thisArg);
    }
    /**
     * Disconnect a slot from the signal.
     *
     * @param slot - The slot to disconnect from the signal.
     *
     * @param thisArg - The `this` context for the slot. If provided,
     *   this must be a non-primitive object.
     *
     * @returns `true` if the connection is removed, `false` otherwise.
     */
    disconnect(slot, thisArg) {
        return Private.disconnect(this, slot, thisArg);
    }
    /**
     * Emit the signal and invoke the connected slots.
     *
     * @param args - The args to pass to the connected slots.
     *
     * #### Notes
     * Slots are invoked synchronously in connection order.
     *
     * Exceptions thrown by connected slots will be caught and logged.
     */
    emit(args) {
        Private.emit(this, args);
    }
}
/**
 * The namespace for the `Signal` class statics.
 */
(function (Signal) {
    /**
     * Remove all connections between a sender and receiver.
     *
     * @param sender - The sender object of interest.
     *
     * @param receiver - The receiver object of interest.
     *
     * #### Notes
     * If a `thisArg` is provided when connecting a signal, that object
     * is considered the receiver. Otherwise, the `slot` is considered
     * the receiver.
     */
    function disconnectBetween(sender, receiver) {
        Private.disconnectBetween(sender, receiver);
    }
    Signal.disconnectBetween = disconnectBetween;
    /**
     * Remove all connections where the given object is the sender.
     *
     * @param sender - The sender object of interest.
     */
    function disconnectSender(sender) {
        Private.disconnectSender(sender);
    }
    Signal.disconnectSender = disconnectSender;
    /**
     * Remove all connections where the given object is the receiver.
     *
     * @param receiver - The receiver object of interest.
     *
     * #### Notes
     * If a `thisArg` is provided when connecting a signal, that object
     * is considered the receiver. Otherwise, the `slot` is considered
     * the receiver.
     */
    function disconnectReceiver(receiver) {
        Private.disconnectReceiver(receiver);
    }
    Signal.disconnectReceiver = disconnectReceiver;
    /**
     * Remove all connections where an object is the sender or receiver.
     *
     * @param object - The object of interest.
     *
     * #### Notes
     * If a `thisArg` is provided when connecting a signal, that object
     * is considered the receiver. Otherwise, the `slot` is considered
     * the receiver.
     */
    function disconnectAll(object) {
        Private.disconnectAll(object);
    }
    Signal.disconnectAll = disconnectAll;
    /**
     * Clear all signal data associated with the given object.
     *
     * @param object - The object for which the data should be cleared.
     *
     * #### Notes
     * This removes all signal connections and any other signal data
     * associated with the object.
     */
    function clearData(object) {
        Private.disconnectAll(object);
    }
    Signal.clearData = clearData;
    /**
     * Get the signal exception handler.
     *
     * @returns The current exception handler.
     *
     * #### Notes
     * The default exception handler is `console.error`.
     */
    function getExceptionHandler() {
        return Private.exceptionHandler;
    }
    Signal.getExceptionHandler = getExceptionHandler;
    /**
     * Set the signal exception handler.
     *
     * @param handler - The function to use as the exception handler.
     *
     * @returns The old exception handler.
     *
     * #### Notes
     * The exception handler is invoked when a slot throws an exception.
     */
    function setExceptionHandler(handler) {
        let old = Private.exceptionHandler;
        Private.exceptionHandler = handler;
        return old;
    }
    Signal.setExceptionHandler = setExceptionHandler;
})(Signal || (Signal = {}));
/**
 * A concrete implementation of `IStream`.
 *
 * #### Example
 * ```typescript
 * import { IStream, Stream } from '@lumino/signaling';
 *
 * class SomeClass {
 *
 *   constructor(name: string) {
 *     this.name = name;
 *   }
 *
 *   readonly name: string;
 *
 *   get pings(): IStream<this, string> {
 *     return this._pings;
 *   }
 *
 *   ping(value: string) {
 *     this._pings.emit(value);
 *   }
 *
 *   private _pings = new Stream<this, string>(this);
 * }
 *
 * let m1 = new SomeClass('foo');
 *
 * m1.pings.connect((_, value: string) => {
 *   console.log('connect', value);
 * });
 *
 * void (async () => {
 *   for await (const ping of m1.pings) {
 *     console.log('iterator', ping);
 *   }
 * })();
 *
 * m1.ping('alpha');  // logs: connect alpha
 *                    // logs: iterator alpha
 * m1.ping('beta');   // logs: connect beta
 *                    // logs: iterator beta
 * ```
 */
class Stream extends Signal {
    constructor() {
        super(...arguments);
        this._pending = new _lumino_coreutils__WEBPACK_IMPORTED_MODULE_1__.PromiseDelegate();
    }
    /**
     * Return an async iterator that yields every emission.
     */
    async *[Symbol.asyncIterator]() {
        let pending = this._pending;
        while (true) {
            try {
                const { args, next } = await pending.promise;
                pending = next;
                yield args;
            }
            catch (_) {
                return; // Any promise rejection stops the iterator.
            }
        }
    }
    /**
     * Emit the signal, invoke the connected slots, and yield the emission.
     *
     * @param args - The args to pass to the connected slots.
     */
    emit(args) {
        const pending = this._pending;
        const next = (this._pending = new _lumino_coreutils__WEBPACK_IMPORTED_MODULE_1__.PromiseDelegate());
        pending.resolve({ args, next });
        super.emit(args);
    }
    /**
     * Stop the stream's async iteration.
     */
    stop() {
        this._pending.promise.catch(() => undefined);
        this._pending.reject('stop');
        this._pending = new _lumino_coreutils__WEBPACK_IMPORTED_MODULE_1__.PromiseDelegate();
    }
}
/**
 * The namespace for the module implementation details.
 */
var Private;
(function (Private) {
    /**
     * The signal exception handler function.
     */
    Private.exceptionHandler = (err) => {
        console.error(err);
    };
    /**
     * Connect a slot to a signal.
     *
     * @param signal - The signal of interest.
     *
     * @param slot - The slot to invoke when the signal is emitted.
     *
     * @param thisArg - The `this` context for the slot. If provided,
     *   this must be a non-primitive object.
     *
     * @returns `true` if the connection succeeds, `false` otherwise.
     */
    function connect(signal, slot, thisArg) {
        // Coerce a `null` `thisArg` to `undefined`.
        thisArg = thisArg || undefined;
        // Ensure the sender's array of receivers is created.
        let receivers = receiversForSender.get(signal.sender);
        if (!receivers) {
            receivers = [];
            receiversForSender.set(signal.sender, receivers);
        }
        // Bail if a matching connection already exists.
        if (findConnection(receivers, signal, slot, thisArg)) {
            return false;
        }
        // Choose the best object for the receiver.
        let receiver = thisArg || slot;
        // Ensure the receiver's array of senders is created.
        let senders = sendersForReceiver.get(receiver);
        if (!senders) {
            senders = [];
            sendersForReceiver.set(receiver, senders);
        }
        // Create a new connection and add it to the end of each array.
        let connection = { signal, slot, thisArg };
        receivers.push(connection);
        senders.push(connection);
        // Indicate a successful connection.
        return true;
    }
    Private.connect = connect;
    /**
     * Disconnect a slot from a signal.
     *
     * @param signal - The signal of interest.
     *
     * @param slot - The slot to disconnect from the signal.
     *
     * @param thisArg - The `this` context for the slot. If provided,
     *   this must be a non-primitive object.
     *
     * @returns `true` if the connection is removed, `false` otherwise.
     */
    function disconnect(signal, slot, thisArg) {
        // Coerce a `null` `thisArg` to `undefined`.
        thisArg = thisArg || undefined;
        // Lookup the list of receivers, and bail if none exist.
        let receivers = receiversForSender.get(signal.sender);
        if (!receivers || receivers.length === 0) {
            return false;
        }
        // Bail if no matching connection exits.
        let connection = findConnection(receivers, signal, slot, thisArg);
        if (!connection) {
            return false;
        }
        // Choose the best object for the receiver.
        let receiver = thisArg || slot;
        // Lookup the array of senders, which is now known to exist.
        let senders = sendersForReceiver.get(receiver);
        // Clear the connection and schedule cleanup of the arrays.
        connection.signal = null;
        scheduleCleanup(receivers);
        scheduleCleanup(senders);
        // Indicate a successful disconnection.
        return true;
    }
    Private.disconnect = disconnect;
    /**
     * Remove all connections between a sender and receiver.
     *
     * @param sender - The sender object of interest.
     *
     * @param receiver - The receiver object of interest.
     */
    function disconnectBetween(sender, receiver) {
        // If there are no receivers, there is nothing to do.
        let receivers = receiversForSender.get(sender);
        if (!receivers || receivers.length === 0) {
            return;
        }
        // If there are no senders, there is nothing to do.
        let senders = sendersForReceiver.get(receiver);
        if (!senders || senders.length === 0) {
            return;
        }
        // Clear each connection between the sender and receiver.
        for (const connection of senders) {
            // Skip connections which have already been cleared.
            if (!connection.signal) {
                continue;
            }
            // Clear the connection if it matches the sender.
            if (connection.signal.sender === sender) {
                connection.signal = null;
            }
        }
        // Schedule a cleanup of the senders and receivers.
        scheduleCleanup(receivers);
        scheduleCleanup(senders);
    }
    Private.disconnectBetween = disconnectBetween;
    /**
     * Remove all connections where the given object is the sender.
     *
     * @param sender - The sender object of interest.
     */
    function disconnectSender(sender) {
        // If there are no receivers, there is nothing to do.
        let receivers = receiversForSender.get(sender);
        if (!receivers || receivers.length === 0) {
            return;
        }
        // Clear each receiver connection.
        for (const connection of receivers) {
            // Skip connections which have already been cleared.
            if (!connection.signal) {
                continue;
            }
            // Choose the best object for the receiver.
            let receiver = connection.thisArg || connection.slot;
            // Clear the connection.
            connection.signal = null;
            // Cleanup the array of senders, which is now known to exist.
            scheduleCleanup(sendersForReceiver.get(receiver));
        }
        // Schedule a cleanup of the receivers.
        scheduleCleanup(receivers);
    }
    Private.disconnectSender = disconnectSender;
    /**
     * Remove all connections where the given object is the receiver.
     *
     * @param receiver - The receiver object of interest.
     */
    function disconnectReceiver(receiver) {
        // If there are no senders, there is nothing to do.
        let senders = sendersForReceiver.get(receiver);
        if (!senders || senders.length === 0) {
            return;
        }
        // Clear each sender connection.
        for (const connection of senders) {
            // Skip connections which have already been cleared.
            if (!connection.signal) {
                continue;
            }
            // Lookup the sender for the connection.
            let sender = connection.signal.sender;
            // Clear the connection.
            connection.signal = null;
            // Cleanup the array of receivers, which is now known to exist.
            scheduleCleanup(receiversForSender.get(sender));
        }
        // Schedule a cleanup of the list of senders.
        scheduleCleanup(senders);
    }
    Private.disconnectReceiver = disconnectReceiver;
    /**
     * Remove all connections where an object is the sender or receiver.
     *
     * @param object - The object of interest.
     */
    function disconnectAll(object) {
        // Remove all connections where the given object is the sender.
        disconnectSender(object);
        // Remove all connections where the given object is the receiver.
        disconnectReceiver(object);
    }
    Private.disconnectAll = disconnectAll;
    /**
     * Emit a signal and invoke its connected slots.
     *
     * @param signal - The signal of interest.
     *
     * @param args - The args to pass to the connected slots.
     *
     * #### Notes
     * Slots are invoked synchronously in connection order.
     *
     * Exceptions thrown by connected slots will be caught and logged.
     */
    function emit(signal, args) {
        // If there are no receivers, there is nothing to do.
        let receivers = receiversForSender.get(signal.sender);
        if (!receivers || receivers.length === 0) {
            return;
        }
        // Invoke the slots for connections with a matching signal.
        // Any connections added during emission are not invoked.
        for (let i = 0, n = receivers.length; i < n; ++i) {
            let connection = receivers[i];
            if (connection.signal === signal) {
                invokeSlot(connection, args);
            }
        }
    }
    Private.emit = emit;
    /**
     * A weak mapping of sender to array of receiver connections.
     */
    const receiversForSender = new WeakMap();
    /**
     * A weak mapping of receiver to array of sender connections.
     */
    const sendersForReceiver = new WeakMap();
    /**
     * A set of connection arrays which are pending cleanup.
     */
    const dirtySet = new Set();
    /**
     * A function to schedule an event loop callback.
     */
    const schedule = (() => {
        let ok = typeof requestAnimationFrame === 'function';
        return ok ? requestAnimationFrame : setImmediate;
    })();
    /**
     * Find a connection which matches the given parameters.
     */
    function findConnection(connections, signal, slot, thisArg) {
        return (0,_lumino_algorithm__WEBPACK_IMPORTED_MODULE_0__.find)(connections, connection => connection.signal === signal &&
            connection.slot === slot &&
            connection.thisArg === thisArg);
    }
    /**
     * Invoke a slot with the given parameters.
     *
     * The connection is assumed to be valid.
     *
     * Exceptions in the slot will be caught and logged.
     */
    function invokeSlot(connection, args) {
        let { signal, slot, thisArg } = connection;
        try {
            slot.call(thisArg, signal.sender, args);
        }
        catch (err) {
            Private.exceptionHandler(err);
        }
    }
    /**
     * Schedule a cleanup of a connection array.
     *
     * This will add the array to the dirty set and schedule a deferred
     * cleanup of the array contents. On cleanup, any connection with a
     * `null` signal will be removed from the array.
     */
    function scheduleCleanup(array) {
        if (dirtySet.size === 0) {
            schedule(cleanupDirtySet);
        }
        dirtySet.add(array);
    }
    /**
     * Cleanup the connection lists in the dirty set.
     *
     * This function should only be invoked asynchronously, when the
     * stack frame is guaranteed to not be on the path of user code.
     */
    function cleanupDirtySet() {
        dirtySet.forEach(cleanupConnections);
        dirtySet.clear();
    }
    /**
     * Cleanup the dirty connections in a connections array.
     *
     * This will remove any connection with a `null` signal.
     *
     * This function should only be invoked asynchronously, when the
     * stack frame is guaranteed to not be on the path of user code.
     */
    function cleanupConnections(connections) {
        _lumino_algorithm__WEBPACK_IMPORTED_MODULE_0__.ArrayExt.removeAllWhere(connections, isDeadConnection);
    }
    /**
     * Test whether a connection is dead.
     *
     * A dead connection has a `null` signal.
     */
    function isDeadConnection(connection) {
        return connection.signal === null;
    }
})(Private || (Private = {}));


//# sourceMappingURL=index.es6.js.map


/***/ }),

/***/ 8792:
/***/ ((module) => {

"use strict";


// do not edit .js files directly - edit src/index.jst



module.exports = function equal(a, b) {
  if (a === b) return true;

  if (a && b && typeof a == 'object' && typeof b == 'object') {
    if (a.constructor !== b.constructor) return false;

    var length, i, keys;
    if (Array.isArray(a)) {
      length = a.length;
      if (length != b.length) return false;
      for (i = length; i-- !== 0;)
        if (!equal(a[i], b[i])) return false;
      return true;
    }



    if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
    if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
    if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();

    keys = Object.keys(a);
    length = keys.length;
    if (length !== Object.keys(b).length) return false;

    for (i = length; i-- !== 0;)
      if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;

    for (i = length; i-- !== 0;) {
      var key = keys[i];

      if (!equal(a[key], b[key])) return false;
    }

    return true;
  }

  // true if both NaN, false otherwise
  return a!==a && b!==b;
};


/***/ }),

/***/ 8317:
/***/ (function(module) {

/*!
 * html2canvas 1.4.1 <https://html2canvas.hertzen.com>
 * Copyright (c) 2022 Niklas von Hertzen <https://hertzen.com>
 * Released under MIT License
 */
(function (global, factory) {
     true ? module.exports = factory() :
    0;
}(this, (function () { 'use strict';

    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted.

    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    PERFORMANCE OF THIS SOFTWARE.
    ***************************************************************************** */
    /* global Reflect, Promise */

    var extendStatics = function(d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };

    function __extends(d, b) {
        if (typeof b !== "function" && b !== null)
            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    }

    var __assign = function() {
        __assign = Object.assign || function __assign(t) {
            for (var s, i = 1, n = arguments.length; i < n; i++) {
                s = arguments[i];
                for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
            }
            return t;
        };
        return __assign.apply(this, arguments);
    };

    function __awaiter(thisArg, _arguments, P, generator) {
        function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
        return new (P || (P = Promise))(function (resolve, reject) {
            function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
            function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
            function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
            step((generator = generator.apply(thisArg, _arguments || [])).next());
        });
    }

    function __generator(thisArg, body) {
        var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
        return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
        function verb(n) { return function (v) { return step([n, v]); }; }
        function step(op) {
            if (f) throw new TypeError("Generator is already executing.");
            while (_) try {
                if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
                if (y = 0, t) op = [op[0] & 2, t.value];
                switch (op[0]) {
                    case 0: case 1: t = op; break;
                    case 4: _.label++; return { value: op[1], done: false };
                    case 5: _.label++; y = op[1]; op = [0]; continue;
                    case 7: op = _.ops.pop(); _.trys.pop(); continue;
                    default:
                        if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                        if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                        if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                        if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                        if (t[2]) _.ops.pop();
                        _.trys.pop(); continue;
                }
                op = body.call(thisArg, _);
            } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
            if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
        }
    }

    function __spreadArray(to, from, pack) {
        if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
            if (ar || !(i in from)) {
                if (!ar) ar = Array.prototype.slice.call(from, 0, i);
                ar[i] = from[i];
            }
        }
        return to.concat(ar || from);
    }

    var Bounds = /** @class */ (function () {
        function Bounds(left, top, width, height) {
            this.left = left;
            this.top = top;
            this.width = width;
            this.height = height;
        }
        Bounds.prototype.add = function (x, y, w, h) {
            return new Bounds(this.left + x, this.top + y, this.width + w, this.height + h);
        };
        Bounds.fromClientRect = function (context, clientRect) {
            return new Bounds(clientRect.left + context.windowBounds.left, clientRect.top + context.windowBounds.top, clientRect.width, clientRect.height);
        };
        Bounds.fromDOMRectList = function (context, domRectList) {
            var domRect = Array.from(domRectList).find(function (rect) { return rect.width !== 0; });
            return domRect
                ? new Bounds(domRect.left + context.windowBounds.left, domRect.top + context.windowBounds.top, domRect.width, domRect.height)
                : Bounds.EMPTY;
        };
        Bounds.EMPTY = new Bounds(0, 0, 0, 0);
        return Bounds;
    }());
    var parseBounds = function (context, node) {
        return Bounds.fromClientRect(context, node.getBoundingClientRect());
    };
    var parseDocumentSize = function (document) {
        var body = document.body;
        var documentElement = document.documentElement;
        if (!body || !documentElement) {
            throw new Error("Unable to get document size");
        }
        var width = Math.max(Math.max(body.scrollWidth, documentElement.scrollWidth), Math.max(body.offsetWidth, documentElement.offsetWidth), Math.max(body.clientWidth, documentElement.clientWidth));
        var height = Math.max(Math.max(body.scrollHeight, documentElement.scrollHeight), Math.max(body.offsetHeight, documentElement.offsetHeight), Math.max(body.clientHeight, documentElement.clientHeight));
        return new Bounds(0, 0, width, height);
    };

    /*
     * css-line-break 2.1.0 <https://github.com/niklasvh/css-line-break#readme>
     * Copyright (c) 2022 Niklas von Hertzen <https://hertzen.com>
     * Released under MIT License
     */
    var toCodePoints$1 = function (str) {
        var codePoints = [];
        var i = 0;
        var length = str.length;
        while (i < length) {
            var value = str.charCodeAt(i++);
            if (value >= 0xd800 && value <= 0xdbff && i < length) {
                var extra = str.charCodeAt(i++);
                if ((extra & 0xfc00) === 0xdc00) {
                    codePoints.push(((value & 0x3ff) << 10) + (extra & 0x3ff) + 0x10000);
                }
                else {
                    codePoints.push(value);
                    i--;
                }
            }
            else {
                codePoints.push(value);
            }
        }
        return codePoints;
    };
    var fromCodePoint$1 = function () {
        var codePoints = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            codePoints[_i] = arguments[_i];
        }
        if (String.fromCodePoint) {
            return String.fromCodePoint.apply(String, codePoints);
        }
        var length = codePoints.length;
        if (!length) {
            return '';
        }
        var codeUnits = [];
        var index = -1;
        var result = '';
        while (++index < length) {
            var codePoint = codePoints[index];
            if (codePoint <= 0xffff) {
                codeUnits.push(codePoint);
            }
            else {
                codePoint -= 0x10000;
                codeUnits.push((codePoint >> 10) + 0xd800, (codePoint % 0x400) + 0xdc00);
            }
            if (index + 1 === length || codeUnits.length > 0x4000) {
                result += String.fromCharCode.apply(String, codeUnits);
                codeUnits.length = 0;
            }
        }
        return result;
    };
    var chars$2 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    // Use a lookup table to find the index.
    var lookup$2 = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
    for (var i$2 = 0; i$2 < chars$2.length; i$2++) {
        lookup$2[chars$2.charCodeAt(i$2)] = i$2;
    }

    /*
     * utrie 1.0.2 <https://github.com/niklasvh/utrie>
     * Copyright (c) 2022 Niklas von Hertzen <https://hertzen.com>
     * Released under MIT License
     */
    var chars$1$1 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    // Use a lookup table to find the index.
    var lookup$1$1 = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
    for (var i$1$1 = 0; i$1$1 < chars$1$1.length; i$1$1++) {
        lookup$1$1[chars$1$1.charCodeAt(i$1$1)] = i$1$1;
    }
    var decode$1 = function (base64) {
        var bufferLength = base64.length * 0.75, len = base64.length, i, p = 0, encoded1, encoded2, encoded3, encoded4;
        if (base64[base64.length - 1] === '=') {
            bufferLength--;
            if (base64[base64.length - 2] === '=') {
                bufferLength--;
            }
        }
        var buffer = typeof ArrayBuffer !== 'undefined' &&
            typeof Uint8Array !== 'undefined' &&
            typeof Uint8Array.prototype.slice !== 'undefined'
            ? new ArrayBuffer(bufferLength)
            : new Array(bufferLength);
        var bytes = Array.isArray(buffer) ? buffer : new Uint8Array(buffer);
        for (i = 0; i < len; i += 4) {
            encoded1 = lookup$1$1[base64.charCodeAt(i)];
            encoded2 = lookup$1$1[base64.charCodeAt(i + 1)];
            encoded3 = lookup$1$1[base64.charCodeAt(i + 2)];
            encoded4 = lookup$1$1[base64.charCodeAt(i + 3)];
            bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
            bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
            bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
        }
        return buffer;
    };
    var polyUint16Array$1 = function (buffer) {
        var length = buffer.length;
        var bytes = [];
        for (var i = 0; i < length; i += 2) {
            bytes.push((buffer[i + 1] << 8) | buffer[i]);
        }
        return bytes;
    };
    var polyUint32Array$1 = function (buffer) {
        var length = buffer.length;
        var bytes = [];
        for (var i = 0; i < length; i += 4) {
            bytes.push((buffer[i + 3] << 24) | (buffer[i + 2] << 16) | (buffer[i + 1] << 8) | buffer[i]);
        }
        return bytes;
    };

    /** Shift size for getting the index-2 table offset. */
    var UTRIE2_SHIFT_2$1 = 5;
    /** Shift size for getting the index-1 table offset. */
    var UTRIE2_SHIFT_1$1 = 6 + 5;
    /**
     * Shift size for shifting left the index array values.
     * Increases possible data size with 16-bit index values at the cost
     * of compactability.
     * This requires data blocks to be aligned by UTRIE2_DATA_GRANULARITY.
     */
    var UTRIE2_INDEX_SHIFT$1 = 2;
    /**
     * Difference between the two shift sizes,
     * for getting an index-1 offset from an index-2 offset. 6=11-5
     */
    var UTRIE2_SHIFT_1_2$1 = UTRIE2_SHIFT_1$1 - UTRIE2_SHIFT_2$1;
    /**
     * The part of the index-2 table for U+D800..U+DBFF stores values for
     * lead surrogate code _units_ not code _points_.
     * Values for lead surrogate code _points_ are indexed with this portion of the table.
     * Length=32=0x20=0x400>>UTRIE2_SHIFT_2. (There are 1024=0x400 lead surrogates.)
     */
    var UTRIE2_LSCP_INDEX_2_OFFSET$1 = 0x10000 >> UTRIE2_SHIFT_2$1;
    /** Number of entries in a data block. 32=0x20 */
    var UTRIE2_DATA_BLOCK_LENGTH$1 = 1 << UTRIE2_SHIFT_2$1;
    /** Mask for getting the lower bits for the in-data-block offset. */
    var UTRIE2_DATA_MASK$1 = UTRIE2_DATA_BLOCK_LENGTH$1 - 1;
    var UTRIE2_LSCP_INDEX_2_LENGTH$1 = 0x400 >> UTRIE2_SHIFT_2$1;
    /** Count the lengths of both BMP pieces. 2080=0x820 */
    var UTRIE2_INDEX_2_BMP_LENGTH$1 = UTRIE2_LSCP_INDEX_2_OFFSET$1 + UTRIE2_LSCP_INDEX_2_LENGTH$1;
    /**
     * The 2-byte UTF-8 version of the index-2 table follows at offset 2080=0x820.
     * Length 32=0x20 for lead bytes C0..DF, regardless of UTRIE2_SHIFT_2.
     */
    var UTRIE2_UTF8_2B_INDEX_2_OFFSET$1 = UTRIE2_INDEX_2_BMP_LENGTH$1;
    var UTRIE2_UTF8_2B_INDEX_2_LENGTH$1 = 0x800 >> 6; /* U+0800 is the first code point after 2-byte UTF-8 */
    /**
     * The index-1 table, only used for supplementary code points, at offset 2112=0x840.
     * Variable length, for code points up to highStart, where the last single-value range starts.
     * Maximum length 512=0x200=0x100000>>UTRIE2_SHIFT_1.
     * (For 0x100000 supplementary code points U+10000..U+10ffff.)
     *
     * The part of the index-2 table for supplementary code points starts
     * after this index-1 table.
     *
     * Both the index-1 table and the following part of the index-2 table
     * are omitted completely if there is only BMP data.
     */
    var UTRIE2_INDEX_1_OFFSET$1 = UTRIE2_UTF8_2B_INDEX_2_OFFSET$1 + UTRIE2_UTF8_2B_INDEX_2_LENGTH$1;
    /**
     * Number of index-1 entries for the BMP. 32=0x20
     * This part of the index-1 table is omitted from the serialized form.
     */
    var UTRIE2_OMITTED_BMP_INDEX_1_LENGTH$1 = 0x10000 >> UTRIE2_SHIFT_1$1;
    /** Number of entries in an index-2 block. 64=0x40 */
    var UTRIE2_INDEX_2_BLOCK_LENGTH$1 = 1 << UTRIE2_SHIFT_1_2$1;
    /** Mask for getting the lower bits for the in-index-2-block offset. */
    var UTRIE2_INDEX_2_MASK$1 = UTRIE2_INDEX_2_BLOCK_LENGTH$1 - 1;
    var slice16$1 = function (view, start, end) {
        if (view.slice) {
            return view.slice(start, end);
        }
        return new Uint16Array(Array.prototype.slice.call(view, start, end));
    };
    var slice32$1 = function (view, start, end) {
        if (view.slice) {
            return view.slice(start, end);
        }
        return new Uint32Array(Array.prototype.slice.call(view, start, end));
    };
    var createTrieFromBase64$1 = function (base64, _byteLength) {
        var buffer = decode$1(base64);
        var view32 = Array.isArray(buffer) ? polyUint32Array$1(buffer) : new Uint32Array(buffer);
        var view16 = Array.isArray(buffer) ? polyUint16Array$1(buffer) : new Uint16Array(buffer);
        var headerLength = 24;
        var index = slice16$1(view16, headerLength / 2, view32[4] / 2);
        var data = view32[5] === 2
            ? slice16$1(view16, (headerLength + view32[4]) / 2)
            : slice32$1(view32, Math.ceil((headerLength + view32[4]) / 4));
        return new Trie$1(view32[0], view32[1], view32[2], view32[3], index, data);
    };
    var Trie$1 = /** @class */ (function () {
        function Trie(initialValue, errorValue, highStart, highValueIndex, index, data) {
            this.initialValue = initialValue;
            this.errorValue = errorValue;
            this.highStart = highStart;
            this.highValueIndex = highValueIndex;
            this.index = index;
            this.data = data;
        }
        /**
         * Get the value for a code point as stored in the Trie.
         *
         * @param codePoint the code point
         * @return the value
         */
        Trie.prototype.get = function (codePoint) {
            var ix;
            if (codePoint >= 0) {
                if (codePoint < 0x0d800 || (codePoint > 0x0dbff && codePoint <= 0x0ffff)) {
                    // Ordinary BMP code point, excluding leading surrogates.
                    // BMP uses a single level lookup.  BMP index starts at offset 0 in the Trie2 index.
                    // 16 bit data is stored in the index array itself.
                    ix = this.index[codePoint >> UTRIE2_SHIFT_2$1];
                    ix = (ix << UTRIE2_INDEX_SHIFT$1) + (codePoint & UTRIE2_DATA_MASK$1);
                    return this.data[ix];
                }
                if (codePoint <= 0xffff) {
                    // Lead Surrogate Code Point.  A Separate index section is stored for
                    // lead surrogate code units and code points.
                    //   The main index has the code unit data.
                    //   For this function, we need the code point data.
                    // Note: this expression could be refactored for slightly improved efficiency, but
                    //       surrogate code points will be so rare in practice that it's not worth it.
                    ix = this.index[UTRIE2_LSCP_INDEX_2_OFFSET$1 + ((codePoint - 0xd800) >> UTRIE2_SHIFT_2$1)];
                    ix = (ix << UTRIE2_INDEX_SHIFT$1) + (codePoint & UTRIE2_DATA_MASK$1);
                    return this.data[ix];
                }
                if (codePoint < this.highStart) {
                    // Supplemental code point, use two-level lookup.
                    ix = UTRIE2_INDEX_1_OFFSET$1 - UTRIE2_OMITTED_BMP_INDEX_1_LENGTH$1 + (codePoint >> UTRIE2_SHIFT_1$1);
                    ix = this.index[ix];
                    ix += (codePoint >> UTRIE2_SHIFT_2$1) & UTRIE2_INDEX_2_MASK$1;
                    ix = this.index[ix];
                    ix = (ix << UTRIE2_INDEX_SHIFT$1) + (codePoint & UTRIE2_DATA_MASK$1);
                    return this.data[ix];
                }
                if (codePoint <= 0x10ffff) {
                    return this.data[this.highValueIndex];
                }
            }
            // Fall through.  The code point is outside of the legal range of 0..0x10ffff.
            return this.errorValue;
        };
        return Trie;
    }());

    /*
     * base64-arraybuffer 1.0.2 <https://github.com/niklasvh/base64-arraybuffer>
     * Copyright (c) 2022 Niklas von Hertzen <https://hertzen.com>
     * Released under MIT License
     */
    var chars$3 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    // Use a lookup table to find the index.
    var lookup$3 = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
    for (var i$3 = 0; i$3 < chars$3.length; i$3++) {
        lookup$3[chars$3.charCodeAt(i$3)] = i$3;
    }

    var base64$1 = ' ';

    var LETTER_NUMBER_MODIFIER = 50;
    // Non-tailorable Line Breaking Classes
    var BK = 1; //  Cause a line break (after)
    var CR$1 = 2; //  Cause a line break (after), except between CR and LF
    var LF$1 = 3; //  Cause a line break (after)
    var CM = 4; //  Prohibit a line break between the character and the preceding character
    var NL = 5; //  Cause a line break (after)
    var WJ = 7; //  Prohibit line breaks before and after
    var ZW = 8; //  Provide a break opportunity
    var GL = 9; //  Prohibit line breaks before and after
    var SP = 10; // Enable indirect line breaks
    var ZWJ$1 = 11; // Prohibit line breaks within joiner sequences
    // Break Opportunities
    var B2 = 12; //  Provide a line break opportunity before and after the character
    var BA = 13; //  Generally provide a line break opportunity after the character
    var BB = 14; //  Generally provide a line break opportunity before the character
    var HY = 15; //  Provide a line break opportunity after the character, except in numeric context
    var CB = 16; //   Provide a line break opportunity contingent on additional information
    // Characters Prohibiting Certain Breaks
    var CL = 17; //  Prohibit line breaks before
    var CP = 18; //  Prohibit line breaks before
    var EX = 19; //  Prohibit line breaks before
    var IN = 20; //  Allow only indirect line breaks between pairs
    var NS = 21; //  Allow only indirect line breaks before
    var OP = 22; //  Prohibit line breaks after
    var QU = 23; //  Act like they are both opening and closing
    // Numeric Context
    var IS = 24; //  Prevent breaks after any and before numeric
    var NU = 25; //  Form numeric expressions for line breaking purposes
    var PO = 26; //  Do not break following a numeric expression
    var PR = 27; //  Do not break in front of a numeric expression
    var SY = 28; //  Prevent a break before; and allow a break after
    // Other Characters
    var AI = 29; //  Act like AL when the resolvedEAW is N; otherwise; act as ID
    var AL = 30; //  Are alphabetic characters or symbols that are used with alphabetic characters
    var CJ = 31; //  Treat as NS or ID for strict or normal breaking.
    var EB = 32; //  Do not break from following Emoji Modifier
    var EM = 33; //  Do not break from preceding Emoji Base
    var H2 = 34; //  Form Korean syllable blocks
    var H3 = 35; //  Form Korean syllable blocks
    var HL = 36; //  Do not break around a following hyphen; otherwise act as Alphabetic
    var ID = 37; //  Break before or after; except in some numeric context
    var JL = 38; //  Form Korean syllable blocks
    var JV = 39; //  Form Korean syllable blocks
    var JT = 40; //  Form Korean syllable blocks
    var RI$1 = 41; //  Keep pairs together. For pairs; break before and after other classes
    var SA = 42; //  Provide a line break opportunity contingent on additional, language-specific context analysis
    var XX = 43; //  Have as yet unknown line breaking behavior or unassigned code positions
    var ea_OP = [0x2329, 0xff08];
    var BREAK_MANDATORY = '!';
    var BREAK_NOT_ALLOWED$1 = '×';
    var BREAK_ALLOWED$1 = '÷';
    var UnicodeTrie$1 = createTrieFromBase64$1(base64$1);
    var ALPHABETICS = [AL, HL];
    var HARD_LINE_BREAKS = [BK, CR$1, LF$1, NL];
    var SPACE$1 = [SP, ZW];
    var PREFIX_POSTFIX = [PR, PO];
    var LINE_BREAKS = HARD_LINE_BREAKS.concat(SPACE$1);
    var KOREAN_SYLLABLE_BLOCK = [JL, JV, JT, H2, H3];
    var HYPHEN = [HY, BA];
    var codePointsToCharacterClasses = function (codePoints, lineBreak) {
        if (lineBreak === void 0) { lineBreak = 'strict'; }
        var types = [];
        var indices = [];
        var categories = [];
        codePoints.forEach(function (codePoint, index) {
            var classType = UnicodeTrie$1.get(codePoint);
            if (classType > LETTER_NUMBER_MODIFIER) {
                categories.push(true);
                classType -= LETTER_NUMBER_MODIFIER;
            }
            else {
                categories.push(false);
            }
            if (['normal', 'auto', 'loose'].indexOf(lineBreak) !== -1) {
                // U+2010, – U+2013, 〜 U+301C, ゠ U+30A0
                if ([0x2010, 0x2013, 0x301c, 0x30a0].indexOf(codePoint) !== -1) {
                    indices.push(index);
                    return types.push(CB);
                }
            }
            if (classType === CM || classType === ZWJ$1) {
                // LB10 Treat any remaining combining mark or ZWJ as AL.
                if (index === 0) {
                    indices.push(index);
                    return types.push(AL);
                }
                // LB9 Do not break a combining character sequence; treat it as if it has the line breaking class of
                // the base character in all of the following rules. Treat ZWJ as if it were CM.
                var prev = types[index - 1];
                if (LINE_BREAKS.indexOf(prev) === -1) {
                    indices.push(indices[index - 1]);
                    return types.push(prev);
                }
                indices.push(index);
                return types.push(AL);
            }
            indices.push(index);
            if (classType === CJ) {
                return types.push(lineBreak === 'strict' ? NS : ID);
            }
            if (classType === SA) {
                return types.push(AL);
            }
            if (classType === AI) {
                return types.push(AL);
            }
            // For supplementary characters, a useful default is to treat characters in the range 10000..1FFFD as AL
            // and characters in the ranges 20000..2FFFD and 30000..3FFFD as ID, until the implementation can be revised
            // to take into account the actual line breaking properties for these characters.
            if (classType === XX) {
                if ((codePoint >= 0x20000 && codePoint <= 0x2fffd) || (codePoint >= 0x30000 && codePoint <= 0x3fffd)) {
                    return types.push(ID);
                }
                else {
                    return types.push(AL);
                }
            }
            types.push(classType);
        });
        return [indices, types, categories];
    };
    var isAdjacentWithSpaceIgnored = function (a, b, currentIndex, classTypes) {
        var current = classTypes[currentIndex];
        if (Array.isArray(a) ? a.indexOf(current) !== -1 : a === current) {
            var i = currentIndex;
            while (i <= classTypes.length) {
                i++;
                var next = classTypes[i];
                if (next === b) {
                    return true;
                }
                if (next !== SP) {
                    break;
                }
            }
        }
        if (current === SP) {
            var i = currentIndex;
            while (i > 0) {
                i--;
                var prev = classTypes[i];
                if (Array.isArray(a) ? a.indexOf(prev) !== -1 : a === prev) {
                    var n = currentIndex;
                    while (n <= classTypes.length) {
                        n++;
                        var next = classTypes[n];
                        if (next === b) {
                            return true;
                        }
                        if (next !== SP) {
                            break;
                        }
                    }
                }
                if (prev !== SP) {
                    break;
                }
            }
        }
        return false;
    };
    var previousNonSpaceClassType = function (currentIndex, classTypes) {
        var i = currentIndex;
        while (i >= 0) {
            var type = classTypes[i];
            if (type === SP) {
                i--;
            }
            else {
                return type;
            }
        }
        return 0;
    };
    var _lineBreakAtIndex = function (codePoints, classTypes, indicies, index, forbiddenBreaks) {
        if (indicies[index] === 0) {
            return BREAK_NOT_ALLOWED$1;
        }
        var currentIndex = index - 1;
        if (Array.isArray(forbiddenBreaks) && forbiddenBreaks[currentIndex] === true) {
            return BREAK_NOT_ALLOWED$1;
        }
        var beforeIndex = currentIndex - 1;
        var afterIndex = currentIndex + 1;
        var current = classTypes[currentIndex];
        // LB4 Always break after hard line breaks.
        // LB5 Treat CR followed by LF, as well as CR, LF, and NL as hard line breaks.
        var before = beforeIndex >= 0 ? classTypes[beforeIndex] : 0;
        var next = classTypes[afterIndex];
        if (current === CR$1 && next === LF$1) {
            return BREAK_NOT_ALLOWED$1;
        }
        if (HARD_LINE_BREAKS.indexOf(current) !== -1) {
            return BREAK_MANDATORY;
        }
        // LB6 Do not break before hard line breaks.
        if (HARD_LINE_BREAKS.indexOf(next) !== -1) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB7 Do not break before spaces or zero width space.
        if (SPACE$1.indexOf(next) !== -1) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB8 Break before any character following a zero-width space, even if one or more spaces intervene.
        if (previousNonSpaceClassType(currentIndex, classTypes) === ZW) {
            return BREAK_ALLOWED$1;
        }
        // LB8a Do not break after a zero width joiner.
        if (UnicodeTrie$1.get(codePoints[currentIndex]) === ZWJ$1) {
            return BREAK_NOT_ALLOWED$1;
        }
        // zwj emojis
        if ((current === EB || current === EM) && UnicodeTrie$1.get(codePoints[afterIndex]) === ZWJ$1) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB11 Do not break before or after Word joiner and related characters.
        if (current === WJ || next === WJ) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB12 Do not break after NBSP and related characters.
        if (current === GL) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB12a Do not break before NBSP and related characters, except after spaces and hyphens.
        if ([SP, BA, HY].indexOf(current) === -1 && next === GL) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB13 Do not break before ‘]’ or ‘!’ or ‘;’ or ‘/’, even after spaces.
        if ([CL, CP, EX, IS, SY].indexOf(next) !== -1) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB14 Do not break after ‘[’, even after spaces.
        if (previousNonSpaceClassType(currentIndex, classTypes) === OP) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB15 Do not break within ‘”[’, even with intervening spaces.
        if (isAdjacentWithSpaceIgnored(QU, OP, currentIndex, classTypes)) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB16 Do not break between closing punctuation and a nonstarter (lb=NS), even with intervening spaces.
        if (isAdjacentWithSpaceIgnored([CL, CP], NS, currentIndex, classTypes)) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB17 Do not break within ‘——’, even with intervening spaces.
        if (isAdjacentWithSpaceIgnored(B2, B2, currentIndex, classTypes)) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB18 Break after spaces.
        if (current === SP) {
            return BREAK_ALLOWED$1;
        }
        // LB19 Do not break before or after quotation marks, such as ‘ ” ’.
        if (current === QU || next === QU) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB20 Break before and after unresolved CB.
        if (next === CB || current === CB) {
            return BREAK_ALLOWED$1;
        }
        // LB21 Do not break before hyphen-minus, other hyphens, fixed-width spaces, small kana, and other non-starters, or after acute accents.
        if ([BA, HY, NS].indexOf(next) !== -1 || current === BB) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB21a Don't break after Hebrew + Hyphen.
        if (before === HL && HYPHEN.indexOf(current) !== -1) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB21b Don’t break between Solidus and Hebrew letters.
        if (current === SY && next === HL) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB22 Do not break before ellipsis.
        if (next === IN) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB23 Do not break between digits and letters.
        if ((ALPHABETICS.indexOf(next) !== -1 && current === NU) || (ALPHABETICS.indexOf(current) !== -1 && next === NU)) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB23a Do not break between numeric prefixes and ideographs, or between ideographs and numeric postfixes.
        if ((current === PR && [ID, EB, EM].indexOf(next) !== -1) ||
            ([ID, EB, EM].indexOf(current) !== -1 && next === PO)) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB24 Do not break between numeric prefix/postfix and letters, or between letters and prefix/postfix.
        if ((ALPHABETICS.indexOf(current) !== -1 && PREFIX_POSTFIX.indexOf(next) !== -1) ||
            (PREFIX_POSTFIX.indexOf(current) !== -1 && ALPHABETICS.indexOf(next) !== -1)) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB25 Do not break between the following pairs of classes relevant to numbers:
        if (
        // (PR | PO) × ( OP | HY )? NU
        ([PR, PO].indexOf(current) !== -1 &&
            (next === NU || ([OP, HY].indexOf(next) !== -1 && classTypes[afterIndex + 1] === NU))) ||
            // ( OP | HY ) × NU
            ([OP, HY].indexOf(current) !== -1 && next === NU) ||
            // NU ×	(NU | SY | IS)
            (current === NU && [NU, SY, IS].indexOf(next) !== -1)) {
            return BREAK_NOT_ALLOWED$1;
        }
        // NU (NU | SY | IS)* × (NU | SY | IS | CL | CP)
        if ([NU, SY, IS, CL, CP].indexOf(next) !== -1) {
            var prevIndex = currentIndex;
            while (prevIndex >= 0) {
                var type = classTypes[prevIndex];
                if (type === NU) {
                    return BREAK_NOT_ALLOWED$1;
                }
                else if ([SY, IS].indexOf(type) !== -1) {
                    prevIndex--;
                }
                else {
                    break;
                }
            }
        }
        // NU (NU | SY | IS)* (CL | CP)? × (PO | PR))
        if ([PR, PO].indexOf(next) !== -1) {
            var prevIndex = [CL, CP].indexOf(current) !== -1 ? beforeIndex : currentIndex;
            while (prevIndex >= 0) {
                var type = classTypes[prevIndex];
                if (type === NU) {
                    return BREAK_NOT_ALLOWED$1;
                }
                else if ([SY, IS].indexOf(type) !== -1) {
                    prevIndex--;
                }
                else {
                    break;
                }
            }
        }
        // LB26 Do not break a Korean syllable.
        if ((JL === current && [JL, JV, H2, H3].indexOf(next) !== -1) ||
            ([JV, H2].indexOf(current) !== -1 && [JV, JT].indexOf(next) !== -1) ||
            ([JT, H3].indexOf(current) !== -1 && next === JT)) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB27 Treat a Korean Syllable Block the same as ID.
        if ((KOREAN_SYLLABLE_BLOCK.indexOf(current) !== -1 && [IN, PO].indexOf(next) !== -1) ||
            (KOREAN_SYLLABLE_BLOCK.indexOf(next) !== -1 && current === PR)) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB28 Do not break between alphabetics (“at”).
        if (ALPHABETICS.indexOf(current) !== -1 && ALPHABETICS.indexOf(next) !== -1) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB29 Do not break between numeric punctuation and alphabetics (“e.g.”).
        if (current === IS && ALPHABETICS.indexOf(next) !== -1) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB30 Do not break between letters, numbers, or ordinary symbols and opening or closing parentheses.
        if ((ALPHABETICS.concat(NU).indexOf(current) !== -1 &&
            next === OP &&
            ea_OP.indexOf(codePoints[afterIndex]) === -1) ||
            (ALPHABETICS.concat(NU).indexOf(next) !== -1 && current === CP)) {
            return BREAK_NOT_ALLOWED$1;
        }
        // LB30a Break between two regional indicator symbols if and only if there are an even number of regional
        // indicators preceding the position of the break.
        if (current === RI$1 && next === RI$1) {
            var i = indicies[currentIndex];
            var count = 1;
            while (i > 0) {
                i--;
                if (classTypes[i] === RI$1) {
                    count++;
                }
                else {
                    break;
                }
            }
            if (count % 2 !== 0) {
                return BREAK_NOT_ALLOWED$1;
            }
        }
        // LB30b Do not break between an emoji base and an emoji modifier.
        if (current === EB && next === EM) {
            return BREAK_NOT_ALLOWED$1;
        }
        return BREAK_ALLOWED$1;
    };
    var cssFormattedClasses = function (codePoints, options) {
        if (!options) {
            options = { lineBreak: 'normal', wordBreak: 'normal' };
        }
        var _a = codePointsToCharacterClasses(codePoints, options.lineBreak), indicies = _a[0], classTypes = _a[1], isLetterNumber = _a[2];
        if (options.wordBreak === 'break-all' || options.wordBreak === 'break-word') {
            classTypes = classTypes.map(function (type) { return ([NU, AL, SA].indexOf(type) !== -1 ? ID : type); });
        }
        var forbiddenBreakpoints = options.wordBreak === 'keep-all'
            ? isLetterNumber.map(function (letterNumber, i) {
                return letterNumber && codePoints[i] >= 0x4e00 && codePoints[i] <= 0x9fff;
            })
            : undefined;
        return [indicies, classTypes, forbiddenBreakpoints];
    };
    var Break = /** @class */ (function () {
        function Break(codePoints, lineBreak, start, end) {
            this.codePoints = codePoints;
            this.required = lineBreak === BREAK_MANDATORY;
            this.start = start;
            this.end = end;
        }
        Break.prototype.slice = function () {
            return fromCodePoint$1.apply(void 0, this.codePoints.slice(this.start, this.end));
        };
        return Break;
    }());
    var LineBreaker = function (str, options) {
        var codePoints = toCodePoints$1(str);
        var _a = cssFormattedClasses(codePoints, options), indicies = _a[0], classTypes = _a[1], forbiddenBreakpoints = _a[2];
        var length = codePoints.length;
        var lastEnd = 0;
        var nextIndex = 0;
        return {
            next: function () {
                if (nextIndex >= length) {
                    return { done: true, value: null };
                }
                var lineBreak = BREAK_NOT_ALLOWED$1;
                while (nextIndex < length &&
                    (lineBreak = _lineBreakAtIndex(codePoints, classTypes, indicies, ++nextIndex, forbiddenBreakpoints)) ===
                        BREAK_NOT_ALLOWED$1) { }
                if (lineBreak !== BREAK_NOT_ALLOWED$1 || nextIndex === length) {
                    var value = new Break(codePoints, lineBreak, lastEnd, nextIndex);
                    lastEnd = nextIndex;
                    return { value: value, done: false };
                }
                return { done: true, value: null };
            },
        };
    };

    // https://www.w3.org/TR/css-syntax-3
    var FLAG_UNRESTRICTED = 1 << 0;
    var FLAG_ID = 1 << 1;
    var FLAG_INTEGER = 1 << 2;
    var FLAG_NUMBER = 1 << 3;
    var LINE_FEED = 0x000a;
    var SOLIDUS = 0x002f;
    var REVERSE_SOLIDUS = 0x005c;
    var CHARACTER_TABULATION = 0x0009;
    var SPACE = 0x0020;
    var QUOTATION_MARK = 0x0022;
    var EQUALS_SIGN = 0x003d;
    var NUMBER_SIGN = 0x0023;
    var DOLLAR_SIGN = 0x0024;
    var PERCENTAGE_SIGN = 0x0025;
    var APOSTROPHE = 0x0027;
    var LEFT_PARENTHESIS = 0x0028;
    var RIGHT_PARENTHESIS = 0x0029;
    var LOW_LINE = 0x005f;
    var HYPHEN_MINUS = 0x002d;
    var EXCLAMATION_MARK = 0x0021;
    var LESS_THAN_SIGN = 0x003c;
    var GREATER_THAN_SIGN = 0x003e;
    var COMMERCIAL_AT = 0x0040;
    var LEFT_SQUARE_BRACKET = 0x005b;
    var RIGHT_SQUARE_BRACKET = 0x005d;
    var CIRCUMFLEX_ACCENT = 0x003d;
    var LEFT_CURLY_BRACKET = 0x007b;
    var QUESTION_MARK = 0x003f;
    var RIGHT_CURLY_BRACKET = 0x007d;
    var VERTICAL_LINE = 0x007c;
    var TILDE = 0x007e;
    var CONTROL = 0x0080;
    var REPLACEMENT_CHARACTER = 0xfffd;
    var ASTERISK = 0x002a;
    var PLUS_SIGN = 0x002b;
    var COMMA = 0x002c;
    var COLON = 0x003a;
    var SEMICOLON = 0x003b;
    var FULL_STOP = 0x002e;
    var NULL = 0x0000;
    var BACKSPACE = 0x0008;
    var LINE_TABULATION = 0x000b;
    var SHIFT_OUT = 0x000e;
    var INFORMATION_SEPARATOR_ONE = 0x001f;
    var DELETE = 0x007f;
    var EOF = -1;
    var ZERO = 0x0030;
    var a = 0x0061;
    var e = 0x0065;
    var f = 0x0066;
    var u = 0x0075;
    var z = 0x007a;
    var A = 0x0041;
    var E = 0x0045;
    var F = 0x0046;
    var U = 0x0055;
    var Z = 0x005a;
    var isDigit = function (codePoint) { return codePoint >= ZERO && codePoint <= 0x0039; };
    var isSurrogateCodePoint = function (codePoint) { return codePoint >= 0xd800 && codePoint <= 0xdfff; };
    var isHex = function (codePoint) {
        return isDigit(codePoint) || (codePoint >= A && codePoint <= F) || (codePoint >= a && codePoint <= f);
    };
    var isLowerCaseLetter = function (codePoint) { return codePoint >= a && codePoint <= z; };
    var isUpperCaseLetter = function (codePoint) { return codePoint >= A && codePoint <= Z; };
    var isLetter = function (codePoint) { return isLowerCaseLetter(codePoint) || isUpperCaseLetter(codePoint); };
    var isNonASCIICodePoint = function (codePoint) { return codePoint >= CONTROL; };
    var isWhiteSpace = function (codePoint) {
        return codePoint === LINE_FEED || codePoint === CHARACTER_TABULATION || codePoint === SPACE;
    };
    var isNameStartCodePoint = function (codePoint) {
        return isLetter(codePoint) || isNonASCIICodePoint(codePoint) || codePoint === LOW_LINE;
    };
    var isNameCodePoint = function (codePoint) {
        return isNameStartCodePoint(codePoint) || isDigit(codePoint) || codePoint === HYPHEN_MINUS;
    };
    var isNonPrintableCodePoint = function (codePoint) {
        return ((codePoint >= NULL && codePoint <= BACKSPACE) ||
            codePoint === LINE_TABULATION ||
            (codePoint >= SHIFT_OUT && codePoint <= INFORMATION_SEPARATOR_ONE) ||
            codePoint === DELETE);
    };
    var isValidEscape = function (c1, c2) {
        if (c1 !== REVERSE_SOLIDUS) {
            return false;
        }
        return c2 !== LINE_FEED;
    };
    var isIdentifierStart = function (c1, c2, c3) {
        if (c1 === HYPHEN_MINUS) {
            return isNameStartCodePoint(c2) || isValidEscape(c2, c3);
        }
        else if (isNameStartCodePoint(c1)) {
            return true;
        }
        else if (c1 === REVERSE_SOLIDUS && isValidEscape(c1, c2)) {
            return true;
        }
        return false;
    };
    var isNumberStart = function (c1, c2, c3) {
        if (c1 === PLUS_SIGN || c1 === HYPHEN_MINUS) {
            if (isDigit(c2)) {
                return true;
            }
            return c2 === FULL_STOP && isDigit(c3);
        }
        if (c1 === FULL_STOP) {
            return isDigit(c2);
        }
        return isDigit(c1);
    };
    var stringToNumber = function (codePoints) {
        var c = 0;
        var sign = 1;
        if (codePoints[c] === PLUS_SIGN || codePoints[c] === HYPHEN_MINUS) {
            if (codePoints[c] === HYPHEN_MINUS) {
                sign = -1;
            }
            c++;
        }
        var integers = [];
        while (isDigit(codePoints[c])) {
            integers.push(codePoints[c++]);
        }
        var int = integers.length ? parseInt(fromCodePoint$1.apply(void 0, integers), 10) : 0;
        if (codePoints[c] === FULL_STOP) {
            c++;
        }
        var fraction = [];
        while (isDigit(codePoints[c])) {
            fraction.push(codePoints[c++]);
        }
        var fracd = fraction.length;
        var frac = fracd ? parseInt(fromCodePoint$1.apply(void 0, fraction), 10) : 0;
        if (codePoints[c] === E || codePoints[c] === e) {
            c++;
        }
        var expsign = 1;
        if (codePoints[c] === PLUS_SIGN || codePoints[c] === HYPHEN_MINUS) {
            if (codePoints[c] === HYPHEN_MINUS) {
                expsign = -1;
            }
            c++;
        }
        var exponent = [];
        while (isDigit(codePoints[c])) {
            exponent.push(codePoints[c++]);
        }
        var exp = exponent.length ? parseInt(fromCodePoint$1.apply(void 0, exponent), 10) : 0;
        return sign * (int + frac * Math.pow(10, -fracd)) * Math.pow(10, expsign * exp);
    };
    var LEFT_PARENTHESIS_TOKEN = {
        type: 2 /* LEFT_PARENTHESIS_TOKEN */
    };
    var RIGHT_PARENTHESIS_TOKEN = {
        type: 3 /* RIGHT_PARENTHESIS_TOKEN */
    };
    var COMMA_TOKEN = { type: 4 /* COMMA_TOKEN */ };
    var SUFFIX_MATCH_TOKEN = { type: 13 /* SUFFIX_MATCH_TOKEN */ };
    var PREFIX_MATCH_TOKEN = { type: 8 /* PREFIX_MATCH_TOKEN */ };
    var COLUMN_TOKEN = { type: 21 /* COLUMN_TOKEN */ };
    var DASH_MATCH_TOKEN = { type: 9 /* DASH_MATCH_TOKEN */ };
    var INCLUDE_MATCH_TOKEN = { type: 10 /* INCLUDE_MATCH_TOKEN */ };
    var LEFT_CURLY_BRACKET_TOKEN = {
        type: 11 /* LEFT_CURLY_BRACKET_TOKEN */
    };
    var RIGHT_CURLY_BRACKET_TOKEN = {
        type: 12 /* RIGHT_CURLY_BRACKET_TOKEN */
    };
    var SUBSTRING_MATCH_TOKEN = { type: 14 /* SUBSTRING_MATCH_TOKEN */ };
    var BAD_URL_TOKEN = { type: 23 /* BAD_URL_TOKEN */ };
    var BAD_STRING_TOKEN = { type: 1 /* BAD_STRING_TOKEN */ };
    var CDO_TOKEN = { type: 25 /* CDO_TOKEN */ };
    var CDC_TOKEN = { type: 24 /* CDC_TOKEN */ };
    var COLON_TOKEN = { type: 26 /* COLON_TOKEN */ };
    var SEMICOLON_TOKEN = { type: 27 /* SEMICOLON_TOKEN */ };
    var LEFT_SQUARE_BRACKET_TOKEN = {
        type: 28 /* LEFT_SQUARE_BRACKET_TOKEN */
    };
    var RIGHT_SQUARE_BRACKET_TOKEN = {
        type: 29 /* RIGHT_SQUARE_BRACKET_TOKEN */
    };
    var WHITESPACE_TOKEN = { type: 31 /* WHITESPACE_TOKEN */ };
    var EOF_TOKEN = { type: 32 /* EOF_TOKEN */ };
    var Tokenizer = /** @class */ (function () {
        function Tokenizer() {
            this._value = [];
        }
        Tokenizer.prototype.write = function (chunk) {
            this._value = this._value.concat(toCodePoints$1(chunk));
        };
        Tokenizer.prototype.read = function () {
            var tokens = [];
            var token = this.consumeToken();
            while (token !== EOF_TOKEN) {
                tokens.push(token);
                token = this.consumeToken();
            }
            return tokens;
        };
        Tokenizer.prototype.consumeToken = function () {
            var codePoint = this.consumeCodePoint();
            switch (codePoint) {
                case QUOTATION_MARK:
                    return this.consumeStringToken(QUOTATION_MARK);
                case NUMBER_SIGN:
                    var c1 = this.peekCodePoint(0);
                    var c2 = this.peekCodePoint(1);
                    var c3 = this.peekCodePoint(2);
                    if (isNameCodePoint(c1) || isValidEscape(c2, c3)) {
                        var flags = isIdentifierStart(c1, c2, c3) ? FLAG_ID : FLAG_UNRESTRICTED;
                        var value = this.consumeName();
                        return { type: 5 /* HASH_TOKEN */, value: value, flags: flags };
                    }
                    break;
                case DOLLAR_SIGN:
                    if (this.peekCodePoint(0) === EQUALS_SIGN) {
                        this.consumeCodePoint();
                        return SUFFIX_MATCH_TOKEN;
                    }
                    break;
                case APOSTROPHE:
                    return this.consumeStringToken(APOSTROPHE);
                case LEFT_PARENTHESIS:
                    return LEFT_PARENTHESIS_TOKEN;
                case RIGHT_PARENTHESIS:
                    return RIGHT_PARENTHESIS_TOKEN;
                case ASTERISK:
                    if (this.peekCodePoint(0) === EQUALS_SIGN) {
                        this.consumeCodePoint();
                        return SUBSTRING_MATCH_TOKEN;
                    }
                    break;
                case PLUS_SIGN:
                    if (isNumberStart(codePoint, this.peekCodePoint(0), this.peekCodePoint(1))) {
                        this.reconsumeCodePoint(codePoint);
                        return this.consumeNumericToken();
                    }
                    break;
                case COMMA:
                    return COMMA_TOKEN;
                case HYPHEN_MINUS:
                    var e1 = codePoint;
                    var e2 = this.peekCodePoint(0);
                    var e3 = this.peekCodePoint(1);
                    if (isNumberStart(e1, e2, e3)) {
                        this.reconsumeCodePoint(codePoint);
                        return this.consumeNumericToken();
                    }
                    if (isIdentifierStart(e1, e2, e3)) {
                        this.reconsumeCodePoint(codePoint);
                        return this.consumeIdentLikeToken();
                    }
                    if (e2 === HYPHEN_MINUS && e3 === GREATER_THAN_SIGN) {
                        this.consumeCodePoint();
                        this.consumeCodePoint();
                        return CDC_TOKEN;
                    }
                    break;
                case FULL_STOP:
                    if (isNumberStart(codePoint, this.peekCodePoint(0), this.peekCodePoint(1))) {
                        this.reconsumeCodePoint(codePoint);
                        return this.consumeNumericToken();
                    }
                    break;
                case SOLIDUS:
                    if (this.peekCodePoint(0) === ASTERISK) {
                        this.consumeCodePoint();
                        while (true) {
                            var c = this.consumeCodePoint();
                            if (c === ASTERISK) {
                                c = this.consumeCodePoint();
                                if (c === SOLIDUS) {
                                    return this.consumeToken();
                                }
                            }
                            if (c === EOF) {
                                return this.consumeToken();
                            }
                        }
                    }
                    break;
                case COLON:
                    return COLON_TOKEN;
                case SEMICOLON:
                    return SEMICOLON_TOKEN;
                case LESS_THAN_SIGN:
                    if (this.peekCodePoint(0) === EXCLAMATION_MARK &&
                        this.peekCodePoint(1) === HYPHEN_MINUS &&
                        this.peekCodePoint(2) === HYPHEN_MINUS) {
                        this.consumeCodePoint();
                        this.consumeCodePoint();
                        return CDO_TOKEN;
                    }
                    break;
                case COMMERCIAL_AT:
                    var a1 = this.peekCodePoint(0);
                    var a2 = this.peekCodePoint(1);
                    var a3 = this.peekCodePoint(2);
                    if (isIdentifierStart(a1, a2, a3)) {
                        var value = this.consumeName();
                        return { type: 7 /* AT_KEYWORD_TOKEN */, value: value };
                    }
                    break;
                case LEFT_SQUARE_BRACKET:
                    return LEFT_SQUARE_BRACKET_TOKEN;
                case REVERSE_SOLIDUS:
                    if (isValidEscape(codePoint, this.peekCodePoint(0))) {
                        this.reconsumeCodePoint(codePoint);
                        return this.consumeIdentLikeToken();
                    }
                    break;
                case RIGHT_SQUARE_BRACKET:
                    return RIGHT_SQUARE_BRACKET_TOKEN;
                case CIRCUMFLEX_ACCENT:
                    if (this.peekCodePoint(0) === EQUALS_SIGN) {
                        this.consumeCodePoint();
                        return PREFIX_MATCH_TOKEN;
                    }
                    break;
                case LEFT_CURLY_BRACKET:
                    return LEFT_CURLY_BRACKET_TOKEN;
                case RIGHT_CURLY_BRACKET:
                    return RIGHT_CURLY_BRACKET_TOKEN;
                case u:
                case U:
                    var u1 = this.peekCodePoint(0);
                    var u2 = this.peekCodePoint(1);
                    if (u1 === PLUS_SIGN && (isHex(u2) || u2 === QUESTION_MARK)) {
                        this.consumeCodePoint();
                        this.consumeUnicodeRangeToken();
                    }
                    this.reconsumeCodePoint(codePoint);
                    return this.consumeIdentLikeToken();
                case VERTICAL_LINE:
                    if (this.peekCodePoint(0) === EQUALS_SIGN) {
                        this.consumeCodePoint();
                        return DASH_MATCH_TOKEN;
                    }
                    if (this.peekCodePoint(0) === VERTICAL_LINE) {
                        this.consumeCodePoint();
                        return COLUMN_TOKEN;
                    }
                    break;
                case TILDE:
                    if (this.peekCodePoint(0) === EQUALS_SIGN) {
                        this.consumeCodePoint();
                        return INCLUDE_MATCH_TOKEN;
                    }
                    break;
                case EOF:
                    return EOF_TOKEN;
            }
            if (isWhiteSpace(codePoint)) {
                this.consumeWhiteSpace();
                return WHITESPACE_TOKEN;
            }
            if (isDigit(codePoint)) {
                this.reconsumeCodePoint(codePoint);
                return this.consumeNumericToken();
            }
            if (isNameStartCodePoint(codePoint)) {
                this.reconsumeCodePoint(codePoint);
                return this.consumeIdentLikeToken();
            }
            return { type: 6 /* DELIM_TOKEN */, value: fromCodePoint$1(codePoint) };
        };
        Tokenizer.prototype.consumeCodePoint = function () {
            var value = this._value.shift();
            return typeof value === 'undefined' ? -1 : value;
        };
        Tokenizer.prototype.reconsumeCodePoint = function (codePoint) {
            this._value.unshift(codePoint);
        };
        Tokenizer.prototype.peekCodePoint = function (delta) {
            if (delta >= this._value.length) {
                return -1;
            }
            return this._value[delta];
        };
        Tokenizer.prototype.consumeUnicodeRangeToken = function () {
            var digits = [];
            var codePoint = this.consumeCodePoint();
            while (isHex(codePoint) && digits.length < 6) {
                digits.push(codePoint);
                codePoint = this.consumeCodePoint();
            }
            var questionMarks = false;
            while (codePoint === QUESTION_MARK && digits.length < 6) {
                digits.push(codePoint);
                codePoint = this.consumeCodePoint();
                questionMarks = true;
            }
            if (questionMarks) {
                var start_1 = parseInt(fromCodePoint$1.apply(void 0, digits.map(function (digit) { return (digit === QUESTION_MARK ? ZERO : digit); })), 16);
                var end = parseInt(fromCodePoint$1.apply(void 0, digits.map(function (digit) { return (digit === QUESTION_MARK ? F : digit); })), 16);
                return { type: 30 /* UNICODE_RANGE_TOKEN */, start: start_1, end: end };
            }
            var start = parseInt(fromCodePoint$1.apply(void 0, digits), 16);
            if (this.peekCodePoint(0) === HYPHEN_MINUS && isHex(this.peekCodePoint(1))) {
                this.consumeCodePoint();
                codePoint = this.consumeCodePoint();
                var endDigits = [];
                while (isHex(codePoint) && endDigits.length < 6) {
                    endDigits.push(codePoint);
                    codePoint = this.consumeCodePoint();
                }
                var end = parseInt(fromCodePoint$1.apply(void 0, endDigits), 16);
                return { type: 30 /* UNICODE_RANGE_TOKEN */, start: start, end: end };
            }
            else {
                return { type: 30 /* UNICODE_RANGE_TOKEN */, start: start, end: start };
            }
        };
        Tokenizer.prototype.consumeIdentLikeToken = function () {
            var value = this.consumeName();
            if (value.toLowerCase() === 'url' && this.peekCodePoint(0) === LEFT_PARENTHESIS) {
                this.consumeCodePoint();
                return this.consumeUrlToken();
            }
            else if (this.peekCodePoint(0) === LEFT_PARENTHESIS) {
                this.consumeCodePoint();
                return { type: 19 /* FUNCTION_TOKEN */, value: value };
            }
            return { type: 20 /* IDENT_TOKEN */, value: value };
        };
        Tokenizer.prototype.consumeUrlToken = function () {
            var value = [];
            this.consumeWhiteSpace();
            if (this.peekCodePoint(0) === EOF) {
                return { type: 22 /* URL_TOKEN */, value: '' };
            }
            var next = this.peekCodePoint(0);
            if (next === APOSTROPHE || next === QUOTATION_MARK) {
                var stringToken = this.consumeStringToken(this.consumeCodePoint());
                if (stringToken.type === 0 /* STRING_TOKEN */) {
                    this.consumeWhiteSpace();
                    if (this.peekCodePoint(0) === EOF || this.peekCodePoint(0) === RIGHT_PARENTHESIS) {
                        this.consumeCodePoint();
                        return { type: 22 /* URL_TOKEN */, value: stringToken.value };
                    }
                }
                this.consumeBadUrlRemnants();
                return BAD_URL_TOKEN;
            }
            while (true) {
                var codePoint = this.consumeCodePoint();
                if (codePoint === EOF || codePoint === RIGHT_PARENTHESIS) {
                    return { type: 22 /* URL_TOKEN */, value: fromCodePoint$1.apply(void 0, value) };
                }
                else if (isWhiteSpace(codePoint)) {
                    this.consumeWhiteSpace();
                    if (this.peekCodePoint(0) === EOF || this.peekCodePoint(0) === RIGHT_PARENTHESIS) {
                        this.consumeCodePoint();
                        return { type: 22 /* URL_TOKEN */, value: fromCodePoint$1.apply(void 0, value) };
                    }
                    this.consumeBadUrlRemnants();
                    return BAD_URL_TOKEN;
                }
                else if (codePoint === QUOTATION_MARK ||
                    codePoint === APOSTROPHE ||
                    codePoint === LEFT_PARENTHESIS ||
                    isNonPrintableCodePoint(codePoint)) {
                    this.consumeBadUrlRemnants();
                    return BAD_URL_TOKEN;
                }
                else if (codePoint === REVERSE_SOLIDUS) {
                    if (isValidEscape(codePoint, this.peekCodePoint(0))) {
                        value.push(this.consumeEscapedCodePoint());
                    }
                    else {
                        this.consumeBadUrlRemnants();
                        return BAD_URL_TOKEN;
                    }
                }
                else {
                    value.push(codePoint);
                }
            }
        };
        Tokenizer.prototype.consumeWhiteSpace = function () {
            while (isWhiteSpace(this.peekCodePoint(0))) {
                this.consumeCodePoint();
            }
        };
        Tokenizer.prototype.consumeBadUrlRemnants = function () {
            while (true) {
                var codePoint = this.consumeCodePoint();
                if (codePoint === RIGHT_PARENTHESIS || codePoint === EOF) {
                    return;
                }
                if (isValidEscape(codePoint, this.peekCodePoint(0))) {
                    this.consumeEscapedCodePoint();
                }
            }
        };
        Tokenizer.prototype.consumeStringSlice = function (count) {
            var SLICE_STACK_SIZE = 50000;
            var value = '';
            while (count > 0) {
                var amount = Math.min(SLICE_STACK_SIZE, count);
                value += fromCodePoint$1.apply(void 0, this._value.splice(0, amount));
                count -= amount;
            }
            this._value.shift();
            return value;
        };
        Tokenizer.prototype.consumeStringToken = function (endingCodePoint) {
            var value = '';
            var i = 0;
            do {
                var codePoint = this._value[i];
                if (codePoint === EOF || codePoint === undefined || codePoint === endingCodePoint) {
                    value += this.consumeStringSlice(i);
                    return { type: 0 /* STRING_TOKEN */, value: value };
                }
                if (codePoint === LINE_FEED) {
                    this._value.splice(0, i);
                    return BAD_STRING_TOKEN;
                }
                if (codePoint === REVERSE_SOLIDUS) {
                    var next = this._value[i + 1];
                    if (next !== EOF && next !== undefined) {
                        if (next === LINE_FEED) {
                            value += this.consumeStringSlice(i);
                            i = -1;
                            this._value.shift();
                        }
                        else if (isValidEscape(codePoint, next)) {
                            value += this.consumeStringSlice(i);
                            value += fromCodePoint$1(this.consumeEscapedCodePoint());
                            i = -1;
                        }
                    }
                }
                i++;
            } while (true);
        };
        Tokenizer.prototype.consumeNumber = function () {
            var repr = [];
            var type = FLAG_INTEGER;
            var c1 = this.peekCodePoint(0);
            if (c1 === PLUS_SIGN || c1 === HYPHEN_MINUS) {
                repr.push(this.consumeCodePoint());
            }
            while (isDigit(this.peekCodePoint(0))) {
                repr.push(this.consumeCodePoint());
            }
            c1 = this.peekCodePoint(0);
            var c2 = this.peekCodePoint(1);
            if (c1 === FULL_STOP && isDigit(c2)) {
                repr.push(this.consumeCodePoint(), this.consumeCodePoint());
                type = FLAG_NUMBER;
                while (isDigit(this.peekCodePoint(0))) {
                    repr.push(this.consumeCodePoint());
                }
            }
            c1 = this.peekCodePoint(0);
            c2 = this.peekCodePoint(1);
            var c3 = this.peekCodePoint(2);
            if ((c1 === E || c1 === e) && (((c2 === PLUS_SIGN || c2 === HYPHEN_MINUS) && isDigit(c3)) || isDigit(c2))) {
                repr.push(this.consumeCodePoint(), this.consumeCodePoint());
                type = FLAG_NUMBER;
                while (isDigit(this.peekCodePoint(0))) {
                    repr.push(this.consumeCodePoint());
                }
            }
            return [stringToNumber(repr), type];
        };
        Tokenizer.prototype.consumeNumericToken = function () {
            var _a = this.consumeNumber(), number = _a[0], flags = _a[1];
            var c1 = this.peekCodePoint(0);
            var c2 = this.peekCodePoint(1);
            var c3 = this.peekCodePoint(2);
            if (isIdentifierStart(c1, c2, c3)) {
                var unit = this.consumeName();
                return { type: 15 /* DIMENSION_TOKEN */, number: number, flags: flags, unit: unit };
            }
            if (c1 === PERCENTAGE_SIGN) {
                this.consumeCodePoint();
                return { type: 16 /* PERCENTAGE_TOKEN */, number: number, flags: flags };
            }
            return { type: 17 /* NUMBER_TOKEN */, number: number, flags: flags };
        };
        Tokenizer.prototype.consumeEscapedCodePoint = function () {
            var codePoint = this.consumeCodePoint();
            if (isHex(codePoint)) {
                var hex = fromCodePoint$1(codePoint);
                while (isHex(this.peekCodePoint(0)) && hex.length < 6) {
                    hex += fromCodePoint$1(this.consumeCodePoint());
                }
                if (isWhiteSpace(this.peekCodePoint(0))) {
                    this.consumeCodePoint();
                }
                var hexCodePoint = parseInt(hex, 16);
                if (hexCodePoint === 0 || isSurrogateCodePoint(hexCodePoint) || hexCodePoint > 0x10ffff) {
                    return REPLACEMENT_CHARACTER;
                }
                return hexCodePoint;
            }
            if (codePoint === EOF) {
                return REPLACEMENT_CHARACTER;
            }
            return codePoint;
        };
        Tokenizer.prototype.consumeName = function () {
            var result = '';
            while (true) {
                var codePoint = this.consumeCodePoint();
                if (isNameCodePoint(codePoint)) {
                    result += fromCodePoint$1(codePoint);
                }
                else if (isValidEscape(codePoint, this.peekCodePoint(0))) {
                    result += fromCodePoint$1(this.consumeEscapedCodePoint());
                }
                else {
                    this.reconsumeCodePoint(codePoint);
                    return result;
                }
            }
        };
        return Tokenizer;
    }());

    var Parser = /** @class */ (function () {
        function Parser(tokens) {
            this._tokens = tokens;
        }
        Parser.create = function (value) {
            var tokenizer = new Tokenizer();
            tokenizer.write(value);
            return new Parser(tokenizer.read());
        };
        Parser.parseValue = function (value) {
            return Parser.create(value).parseComponentValue();
        };
        Parser.parseValues = function (value) {
            return Parser.create(value).parseComponentValues();
        };
        Parser.prototype.parseComponentValue = function () {
            var token = this.consumeToken();
            while (token.type === 31 /* WHITESPACE_TOKEN */) {
                token = this.consumeToken();
            }
            if (token.type === 32 /* EOF_TOKEN */) {
                throw new SyntaxError("Error parsing CSS component value, unexpected EOF");
            }
            this.reconsumeToken(token);
            var value = this.consumeComponentValue();
            do {
                token = this.consumeToken();
            } while (token.type === 31 /* WHITESPACE_TOKEN */);
            if (token.type === 32 /* EOF_TOKEN */) {
                return value;
            }
            throw new SyntaxError("Error parsing CSS component value, multiple values found when expecting only one");
        };
        Parser.prototype.parseComponentValues = function () {
            var values = [];
            while (true) {
                var value = this.consumeComponentValue();
                if (value.type === 32 /* EOF_TOKEN */) {
                    return values;
                }
                values.push(value);
                values.push();
            }
        };
        Parser.prototype.consumeComponentValue = function () {
            var token = this.consumeToken();
            switch (token.type) {
                case 11 /* LEFT_CURLY_BRACKET_TOKEN */:
                case 28 /* LEFT_SQUARE_BRACKET_TOKEN */:
                case 2 /* LEFT_PARENTHESIS_TOKEN */:
                    return this.consumeSimpleBlock(token.type);
                case 19 /* FUNCTION_TOKEN */:
                    return this.consumeFunction(token);
            }
            return token;
        };
        Parser.prototype.consumeSimpleBlock = function (type) {
            var block = { type: type, values: [] };
            var token = this.consumeToken();
            while (true) {
                if (token.type === 32 /* EOF_TOKEN */ || isEndingTokenFor(token, type)) {
                    return block;
                }
                this.reconsumeToken(token);
                block.values.push(this.consumeComponentValue());
                token = this.consumeToken();
            }
        };
        Parser.prototype.consumeFunction = function (functionToken) {
            var cssFunction = {
                name: functionToken.value,
                values: [],
                type: 18 /* FUNCTION */
            };
            while (true) {
                var token = this.consumeToken();
                if (token.type === 32 /* EOF_TOKEN */ || token.type === 3 /* RIGHT_PARENTHESIS_TOKEN */) {
                    return cssFunction;
                }
                this.reconsumeToken(token);
                cssFunction.values.push(this.consumeComponentValue());
            }
        };
        Parser.prototype.consumeToken = function () {
            var token = this._tokens.shift();
            return typeof token === 'undefined' ? EOF_TOKEN : token;
        };
        Parser.prototype.reconsumeToken = function (token) {
            this._tokens.unshift(token);
        };
        return Parser;
    }());
    var isDimensionToken = function (token) { return token.type === 15 /* DIMENSION_TOKEN */; };
    var isNumberToken = function (token) { return token.type === 17 /* NUMBER_TOKEN */; };
    var isIdentToken = function (token) { return token.type === 20 /* IDENT_TOKEN */; };
    var isStringToken = function (token) { return token.type === 0 /* STRING_TOKEN */; };
    var isIdentWithValue = function (token, value) {
        return isIdentToken(token) && token.value === value;
    };
    var nonWhiteSpace = function (token) { return token.type !== 31 /* WHITESPACE_TOKEN */; };
    var nonFunctionArgSeparator = function (token) {
        return token.type !== 31 /* WHITESPACE_TOKEN */ && token.type !== 4 /* COMMA_TOKEN */;
    };
    var parseFunctionArgs = function (tokens) {
        var args = [];
        var arg = [];
        tokens.forEach(function (token) {
            if (token.type === 4 /* COMMA_TOKEN */) {
                if (arg.length === 0) {
                    throw new Error("Error parsing function args, zero tokens for arg");
                }
                args.push(arg);
                arg = [];
                return;
            }
            if (token.type !== 31 /* WHITESPACE_TOKEN */) {
                arg.push(token);
            }
        });
        if (arg.length) {
            args.push(arg);
        }
        return args;
    };
    var isEndingTokenFor = function (token, type) {
        if (type === 11 /* LEFT_CURLY_BRACKET_TOKEN */ && token.type === 12 /* RIGHT_CURLY_BRACKET_TOKEN */) {
            return true;
        }
        if (type === 28 /* LEFT_SQUARE_BRACKET_TOKEN */ && token.type === 29 /* RIGHT_SQUARE_BRACKET_TOKEN */) {
            return true;
        }
        return type === 2 /* LEFT_PARENTHESIS_TOKEN */ && token.type === 3 /* RIGHT_PARENTHESIS_TOKEN */;
    };

    var isLength = function (token) {
        return token.type === 17 /* NUMBER_TOKEN */ || token.type === 15 /* DIMENSION_TOKEN */;
    };

    var isLengthPercentage = function (token) {
        return token.type === 16 /* PERCENTAGE_TOKEN */ || isLength(token);
    };
    var parseLengthPercentageTuple = function (tokens) {
        return tokens.length > 1 ? [tokens[0], tokens[1]] : [tokens[0]];
    };
    var ZERO_LENGTH = {
        type: 17 /* NUMBER_TOKEN */,
        number: 0,
        flags: FLAG_INTEGER
    };
    var FIFTY_PERCENT = {
        type: 16 /* PERCENTAGE_TOKEN */,
        number: 50,
        flags: FLAG_INTEGER
    };
    var HUNDRED_PERCENT = {
        type: 16 /* PERCENTAGE_TOKEN */,
        number: 100,
        flags: FLAG_INTEGER
    };
    var getAbsoluteValueForTuple = function (tuple, width, height) {
        var x = tuple[0], y = tuple[1];
        return [getAbsoluteValue(x, width), getAbsoluteValue(typeof y !== 'undefined' ? y : x, height)];
    };
    var getAbsoluteValue = function (token, parent) {
        if (token.type === 16 /* PERCENTAGE_TOKEN */) {
            return (token.number / 100) * parent;
        }
        if (isDimensionToken(token)) {
            switch (token.unit) {
                case 'rem':
                case 'em':
                    return 16 * token.number; // TODO use correct font-size
                case 'px':
                default:
                    return token.number;
            }
        }
        return token.number;
    };

    var DEG = 'deg';
    var GRAD = 'grad';
    var RAD = 'rad';
    var TURN = 'turn';
    var angle = {
        name: 'angle',
        parse: function (_context, value) {
            if (value.type === 15 /* DIMENSION_TOKEN */) {
                switch (value.unit) {
                    case DEG:
                        return (Math.PI * value.number) / 180;
                    case GRAD:
                        return (Math.PI / 200) * value.number;
                    case RAD:
                        return value.number;
                    case TURN:
                        return Math.PI * 2 * value.number;
                }
            }
            throw new Error("Unsupported angle type");
        }
    };
    var isAngle = function (value) {
        if (value.type === 15 /* DIMENSION_TOKEN */) {
            if (value.unit === DEG || value.unit === GRAD || value.unit === RAD || value.unit === TURN) {
                return true;
            }
        }
        return false;
    };
    var parseNamedSide = function (tokens) {
        var sideOrCorner = tokens
            .filter(isIdentToken)
            .map(function (ident) { return ident.value; })
            .join(' ');
        switch (sideOrCorner) {
            case 'to bottom right':
            case 'to right bottom':
            case 'left top':
            case 'top left':
                return [ZERO_LENGTH, ZERO_LENGTH];
            case 'to top':
            case 'bottom':
                return deg(0);
            case 'to bottom left':
            case 'to left bottom':
            case 'right top':
            case 'top right':
                return [ZERO_LENGTH, HUNDRED_PERCENT];
            case 'to right':
            case 'left':
                return deg(90);
            case 'to top left':
            case 'to left top':
            case 'right bottom':
            case 'bottom right':
                return [HUNDRED_PERCENT, HUNDRED_PERCENT];
            case 'to bottom':
            case 'top':
                return deg(180);
            case 'to top right':
            case 'to right top':
            case 'left bottom':
            case 'bottom left':
                return [HUNDRED_PERCENT, ZERO_LENGTH];
            case 'to left':
            case 'right':
                return deg(270);
        }
        return 0;
    };
    var deg = function (deg) { return (Math.PI * deg) / 180; };

    var color$1 = {
        name: 'color',
        parse: function (context, value) {
            if (value.type === 18 /* FUNCTION */) {
                var colorFunction = SUPPORTED_COLOR_FUNCTIONS[value.name];
                if (typeof colorFunction === 'undefined') {
                    throw new Error("Attempting to parse an unsupported color function \"" + value.name + "\"");
                }
                return colorFunction(context, value.values);
            }
            if (value.type === 5 /* HASH_TOKEN */) {
                if (value.value.length === 3) {
                    var r = value.value.substring(0, 1);
                    var g = value.value.substring(1, 2);
                    var b = value.value.substring(2, 3);
                    return pack(parseInt(r + r, 16), parseInt(g + g, 16), parseInt(b + b, 16), 1);
                }
                if (value.value.length === 4) {
                    var r = value.value.substring(0, 1);
                    var g = value.value.substring(1, 2);
                    var b = value.value.substring(2, 3);
                    var a = value.value.substring(3, 4);
                    return pack(parseInt(r + r, 16), parseInt(g + g, 16), parseInt(b + b, 16), parseInt(a + a, 16) / 255);
                }
                if (value.value.length === 6) {
                    var r = value.value.substring(0, 2);
                    var g = value.value.substring(2, 4);
                    var b = value.value.substring(4, 6);
                    return pack(parseInt(r, 16), parseInt(g, 16), parseInt(b, 16), 1);
                }
                if (value.value.length === 8) {
                    var r = value.value.substring(0, 2);
                    var g = value.value.substring(2, 4);
                    var b = value.value.substring(4, 6);
                    var a = value.value.substring(6, 8);
                    return pack(parseInt(r, 16), parseInt(g, 16), parseInt(b, 16), parseInt(a, 16) / 255);
                }
            }
            if (value.type === 20 /* IDENT_TOKEN */) {
                var namedColor = COLORS[value.value.toUpperCase()];
                if (typeof namedColor !== 'undefined') {
                    return namedColor;
                }
            }
            return COLORS.TRANSPARENT;
        }
    };
    var isTransparent = function (color) { return (0xff & color) === 0; };
    var asString = function (color) {
        var alpha = 0xff & color;
        var blue = 0xff & (color >> 8);
        var green = 0xff & (color >> 16);
        var red = 0xff & (color >> 24);
        return alpha < 255 ? "rgba(" + red + "," + green + "," + blue + "," + alpha / 255 + ")" : "rgb(" + red + "," + green + "," + blue + ")";
    };
    var pack = function (r, g, b, a) {
        return ((r << 24) | (g << 16) | (b << 8) | (Math.round(a * 255) << 0)) >>> 0;
    };
    var getTokenColorValue = function (token, i) {
        if (token.type === 17 /* NUMBER_TOKEN */) {
            return token.number;
        }
        if (token.type === 16 /* PERCENTAGE_TOKEN */) {
            var max = i === 3 ? 1 : 255;
            return i === 3 ? (token.number / 100) * max : Math.round((token.number / 100) * max);
        }
        return 0;
    };
    var rgb = function (_context, args) {
        var tokens = args.filter(nonFunctionArgSeparator);
        if (tokens.length === 3) {
            var _a = tokens.map(getTokenColorValue), r = _a[0], g = _a[1], b = _a[2];
            return pack(r, g, b, 1);
        }
        if (tokens.length === 4) {
            var _b = tokens.map(getTokenColorValue), r = _b[0], g = _b[1], b = _b[2], a = _b[3];
            return pack(r, g, b, a);
        }
        return 0;
    };
    function hue2rgb(t1, t2, hue) {
        if (hue < 0) {
            hue += 1;
        }
        if (hue >= 1) {
            hue -= 1;
        }
        if (hue < 1 / 6) {
            return (t2 - t1) * hue * 6 + t1;
        }
        else if (hue < 1 / 2) {
            return t2;
        }
        else if (hue < 2 / 3) {
            return (t2 - t1) * 6 * (2 / 3 - hue) + t1;
        }
        else {
            return t1;
        }
    }
    var hsl = function (context, args) {
        var tokens = args.filter(nonFunctionArgSeparator);
        var hue = tokens[0], saturation = tokens[1], lightness = tokens[2], alpha = tokens[3];
        var h = (hue.type === 17 /* NUMBER_TOKEN */ ? deg(hue.number) : angle.parse(context, hue)) / (Math.PI * 2);
        var s = isLengthPercentage(saturation) ? saturation.number / 100 : 0;
        var l = isLengthPercentage(lightness) ? lightness.number / 100 : 0;
        var a = typeof alpha !== 'undefined' && isLengthPercentage(alpha) ? getAbsoluteValue(alpha, 1) : 1;
        if (s === 0) {
            return pack(l * 255, l * 255, l * 255, 1);
        }
        var t2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;
        var t1 = l * 2 - t2;
        var r = hue2rgb(t1, t2, h + 1 / 3);
        var g = hue2rgb(t1, t2, h);
        var b = hue2rgb(t1, t2, h - 1 / 3);
        return pack(r * 255, g * 255, b * 255, a);
    };
    var SUPPORTED_COLOR_FUNCTIONS = {
        hsl: hsl,
        hsla: hsl,
        rgb: rgb,
        rgba: rgb
    };
    var parseColor = function (context, value) {
        return color$1.parse(context, Parser.create(value).parseComponentValue());
    };
    var COLORS = {
        ALICEBLUE: 0xf0f8ffff,
        ANTIQUEWHITE: 0xfaebd7ff,
        AQUA: 0x00ffffff,
        AQUAMARINE: 0x7fffd4ff,
        AZURE: 0xf0ffffff,
        BEIGE: 0xf5f5dcff,
        BISQUE: 0xffe4c4ff,
        BLACK: 0x000000ff,
        BLANCHEDALMOND: 0xffebcdff,
        BLUE: 0x0000ffff,
        BLUEVIOLET: 0x8a2be2ff,
        BROWN: 0xa52a2aff,
        BURLYWOOD: 0xdeb887ff,
        CADETBLUE: 0x5f9ea0ff,
        CHARTREUSE: 0x7fff00ff,
        CHOCOLATE: 0xd2691eff,
        CORAL: 0xff7f50ff,
        CORNFLOWERBLUE: 0x6495edff,
        CORNSILK: 0xfff8dcff,
        CRIMSON: 0xdc143cff,
        CYAN: 0x00ffffff,
        DARKBLUE: 0x00008bff,
        DARKCYAN: 0x008b8bff,
        DARKGOLDENROD: 0xb886bbff,
        DARKGRAY: 0xa9a9a9ff,
        DARKGREEN: 0x006400ff,
        DARKGREY: 0xa9a9a9ff,
        DARKKHAKI: 0xbdb76bff,
        DARKMAGENTA: 0x8b008bff,
        DARKOLIVEGREEN: 0x556b2fff,
        DARKORANGE: 0xff8c00ff,
        DARKORCHID: 0x9932ccff,
        DARKRED: 0x8b0000ff,
        DARKSALMON: 0xe9967aff,
        DARKSEAGREEN: 0x8fbc8fff,
        DARKSLATEBLUE: 0x483d8bff,
        DARKSLATEGRAY: 0x2f4f4fff,
        DARKSLATEGREY: 0x2f4f4fff,
        DARKTURQUOISE: 0x00ced1ff,
        DARKVIOLET: 0x9400d3ff,
        DEEPPINK: 0xff1493ff,
        DEEPSKYBLUE: 0x00bfffff,
        DIMGRAY: 0x696969ff,
        DIMGREY: 0x696969ff,
        DODGERBLUE: 0x1e90ffff,
        FIREBRICK: 0xb22222ff,
        FLORALWHITE: 0xfffaf0ff,
        FORESTGREEN: 0x228b22ff,
        FUCHSIA: 0xff00ffff,
        GAINSBORO: 0xdcdcdcff,
        GHOSTWHITE: 0xf8f8ffff,
        GOLD: 0xffd700ff,
        GOLDENROD: 0xdaa520ff,
        GRAY: 0x808080ff,
        GREEN: 0x008000ff,
        GREENYELLOW: 0xadff2fff,
        GREY: 0x808080ff,
        HONEYDEW: 0xf0fff0ff,
        HOTPINK: 0xff69b4ff,
        INDIANRED: 0xcd5c5cff,
        INDIGO: 0x4b0082ff,
        IVORY: 0xfffff0ff,
        KHAKI: 0xf0e68cff,
        LAVENDER: 0xe6e6faff,
        LAVENDERBLUSH: 0xfff0f5ff,
        LAWNGREEN: 0x7cfc00ff,
        LEMONCHIFFON: 0xfffacdff,
        LIGHTBLUE: 0xadd8e6ff,
        LIGHTCORAL: 0xf08080ff,
        LIGHTCYAN: 0xe0ffffff,
        LIGHTGOLDENRODYELLOW: 0xfafad2ff,
        LIGHTGRAY: 0xd3d3d3ff,
        LIGHTGREEN: 0x90ee90ff,
        LIGHTGREY: 0xd3d3d3ff,
        LIGHTPINK: 0xffb6c1ff,
        LIGHTSALMON: 0xffa07aff,
        LIGHTSEAGREEN: 0x20b2aaff,
        LIGHTSKYBLUE: 0x87cefaff,
        LIGHTSLATEGRAY: 0x778899ff,
        LIGHTSLATEGREY: 0x778899ff,
        LIGHTSTEELBLUE: 0xb0c4deff,
        LIGHTYELLOW: 0xffffe0ff,
        LIME: 0x00ff00ff,
        LIMEGREEN: 0x32cd32ff,
        LINEN: 0xfaf0e6ff,
        MAGENTA: 0xff00ffff,
        MAROON: 0x800000ff,
        MEDIUMAQUAMARINE: 0x66cdaaff,
        MEDIUMBLUE: 0x0000cdff,
        MEDIUMORCHID: 0xba55d3ff,
        MEDIUMPURPLE: 0x9370dbff,
        MEDIUMSEAGREEN: 0x3cb371ff,
        MEDIUMSLATEBLUE: 0x7b68eeff,
        MEDIUMSPRINGGREEN: 0x00fa9aff,
        MEDIUMTURQUOISE: 0x48d1ccff,
        MEDIUMVIOLETRED: 0xc71585ff,
        MIDNIGHTBLUE: 0x191970ff,
        MINTCREAM: 0xf5fffaff,
        MISTYROSE: 0xffe4e1ff,
        MOCCASIN: 0xffe4b5ff,
        NAVAJOWHITE: 0xffdeadff,
        NAVY: 0x000080ff,
        OLDLACE: 0xfdf5e6ff,
        OLIVE: 0x808000ff,
        OLIVEDRAB: 0x6b8e23ff,
        ORANGE: 0xffa500ff,
        ORANGERED: 0xff4500ff,
        ORCHID: 0xda70d6ff,
        PALEGOLDENROD: 0xeee8aaff,
        PALEGREEN: 0x98fb98ff,
        PALETURQUOISE: 0xafeeeeff,
        PALEVIOLETRED: 0xdb7093ff,
        PAPAYAWHIP: 0xffefd5ff,
        PEACHPUFF: 0xffdab9ff,
        PERU: 0xcd853fff,
        PINK: 0xffc0cbff,
        PLUM: 0xdda0ddff,
        POWDERBLUE: 0xb0e0e6ff,
        PURPLE: 0x800080ff,
        REBECCAPURPLE: 0x663399ff,
        RED: 0xff0000ff,
        ROSYBROWN: 0xbc8f8fff,
        ROYALBLUE: 0x4169e1ff,
        SADDLEBROWN: 0x8b4513ff,
        SALMON: 0xfa8072ff,
        SANDYBROWN: 0xf4a460ff,
        SEAGREEN: 0x2e8b57ff,
        SEASHELL: 0xfff5eeff,
        SIENNA: 0xa0522dff,
        SILVER: 0xc0c0c0ff,
        SKYBLUE: 0x87ceebff,
        SLATEBLUE: 0x6a5acdff,
        SLATEGRAY: 0x708090ff,
        SLATEGREY: 0x708090ff,
        SNOW: 0xfffafaff,
        SPRINGGREEN: 0x00ff7fff,
        STEELBLUE: 0x4682b4ff,
        TAN: 0xd2b48cff,
        TEAL: 0x008080ff,
        THISTLE: 0xd8bfd8ff,
        TOMATO: 0xff6347ff,
        TRANSPARENT: 0x00000000,
        TURQUOISE: 0x40e0d0ff,
        VIOLET: 0xee82eeff,
        WHEAT: 0xf5deb3ff,
        WHITE: 0xffffffff,
        WHITESMOKE: 0xf5f5f5ff,
        YELLOW: 0xffff00ff,
        YELLOWGREEN: 0x9acd32ff
    };

    var backgroundClip = {
        name: 'background-clip',
        initialValue: 'border-box',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            return tokens.map(function (token) {
                if (isIdentToken(token)) {
                    switch (token.value) {
                        case 'padding-box':
                            return 1 /* PADDING_BOX */;
                        case 'content-box':
                            return 2 /* CONTENT_BOX */;
                    }
                }
                return 0 /* BORDER_BOX */;
            });
        }
    };

    var backgroundColor = {
        name: "background-color",
        initialValue: 'transparent',
        prefix: false,
        type: 3 /* TYPE_VALUE */,
        format: 'color'
    };

    var parseColorStop = function (context, args) {
        var color = color$1.parse(context, args[0]);
        var stop = args[1];
        return stop && isLengthPercentage(stop) ? { color: color, stop: stop } : { color: color, stop: null };
    };
    var processColorStops = function (stops, lineLength) {
        var first = stops[0];
        var last = stops[stops.length - 1];
        if (first.stop === null) {
            first.stop = ZERO_LENGTH;
        }
        if (last.stop === null) {
            last.stop = HUNDRED_PERCENT;
        }
        var processStops = [];
        var previous = 0;
        for (var i = 0; i < stops.length; i++) {
            var stop_1 = stops[i].stop;
            if (stop_1 !== null) {
                var absoluteValue = getAbsoluteValue(stop_1, lineLength);
                if (absoluteValue > previous) {
                    processStops.push(absoluteValue);
                }
                else {
                    processStops.push(previous);
                }
                previous = absoluteValue;
            }
            else {
                processStops.push(null);
            }
        }
        var gapBegin = null;
        for (var i = 0; i < processStops.length; i++) {
            var stop_2 = processStops[i];
            if (stop_2 === null) {
                if (gapBegin === null) {
                    gapBegin = i;
                }
            }
            else if (gapBegin !== null) {
                var gapLength = i - gapBegin;
                var beforeGap = processStops[gapBegin - 1];
                var gapValue = (stop_2 - beforeGap) / (gapLength + 1);
                for (var g = 1; g <= gapLength; g++) {
                    processStops[gapBegin + g - 1] = gapValue * g;
                }
                gapBegin = null;
            }
        }
        return stops.map(function (_a, i) {
            var color = _a.color;
            return { color: color, stop: Math.max(Math.min(1, processStops[i] / lineLength), 0) };
        });
    };
    var getAngleFromCorner = function (corner, width, height) {
        var centerX = width / 2;
        var centerY = height / 2;
        var x = getAbsoluteValue(corner[0], width) - centerX;
        var y = centerY - getAbsoluteValue(corner[1], height);
        return (Math.atan2(y, x) + Math.PI * 2) % (Math.PI * 2);
    };
    var calculateGradientDirection = function (angle, width, height) {
        var radian = typeof angle === 'number' ? angle : getAngleFromCorner(angle, width, height);
        var lineLength = Math.abs(width * Math.sin(radian)) + Math.abs(height * Math.cos(radian));
        var halfWidth = width / 2;
        var halfHeight = height / 2;
        var halfLineLength = lineLength / 2;
        var yDiff = Math.sin(radian - Math.PI / 2) * halfLineLength;
        var xDiff = Math.cos(radian - Math.PI / 2) * halfLineLength;
        return [lineLength, halfWidth - xDiff, halfWidth + xDiff, halfHeight - yDiff, halfHeight + yDiff];
    };
    var distance = function (a, b) { return Math.sqrt(a * a + b * b); };
    var findCorner = function (width, height, x, y, closest) {
        var corners = [
            [0, 0],
            [0, height],
            [width, 0],
            [width, height]
        ];
        return corners.reduce(function (stat, corner) {
            var cx = corner[0], cy = corner[1];
            var d = distance(x - cx, y - cy);
            if (closest ? d < stat.optimumDistance : d > stat.optimumDistance) {
                return {
                    optimumCorner: corner,
                    optimumDistance: d
                };
            }
            return stat;
        }, {
            optimumDistance: closest ? Infinity : -Infinity,
            optimumCorner: null
        }).optimumCorner;
    };
    var calculateRadius = function (gradient, x, y, width, height) {
        var rx = 0;
        var ry = 0;
        switch (gradient.size) {
            case 0 /* CLOSEST_SIDE */:
                // The ending shape is sized so that that it exactly meets the side of the gradient box closest to the gradient’s center.
                // If the shape is an ellipse, it exactly meets the closest side in each dimension.
                if (gradient.shape === 0 /* CIRCLE */) {
                    rx = ry = Math.min(Math.abs(x), Math.abs(x - width), Math.abs(y), Math.abs(y - height));
                }
                else if (gradient.shape === 1 /* ELLIPSE */) {
                    rx = Math.min(Math.abs(x), Math.abs(x - width));
                    ry = Math.min(Math.abs(y), Math.abs(y - height));
                }
                break;
            case 2 /* CLOSEST_CORNER */:
                // The ending shape is sized so that that it passes through the corner of the gradient box closest to the gradient’s center.
                // If the shape is an ellipse, the ending shape is given the same aspect-ratio it would have if closest-side were specified.
                if (gradient.shape === 0 /* CIRCLE */) {
                    rx = ry = Math.min(distance(x, y), distance(x, y - height), distance(x - width, y), distance(x - width, y - height));
                }
                else if (gradient.shape === 1 /* ELLIPSE */) {
                    // Compute the ratio ry/rx (which is to be the same as for "closest-side")
                    var c = Math.min(Math.abs(y), Math.abs(y - height)) / Math.min(Math.abs(x), Math.abs(x - width));
                    var _a = findCorner(width, height, x, y, true), cx = _a[0], cy = _a[1];
                    rx = distance(cx - x, (cy - y) / c);
                    ry = c * rx;
                }
                break;
            case 1 /* FARTHEST_SIDE */:
                // Same as closest-side, except the ending shape is sized based on the farthest side(s)
                if (gradient.shape === 0 /* CIRCLE */) {
                    rx = ry = Math.max(Math.abs(x), Math.abs(x - width), Math.abs(y), Math.abs(y - height));
                }
                else if (gradient.shape === 1 /* ELLIPSE */) {
                    rx = Math.max(Math.abs(x), Math.abs(x - width));
                    ry = Math.max(Math.abs(y), Math.abs(y - height));
                }
                break;
            case 3 /* FARTHEST_CORNER */:
                // Same as closest-corner, except the ending shape is sized based on the farthest corner.
                // If the shape is an ellipse, the ending shape is given the same aspect ratio it would have if farthest-side were specified.
                if (gradient.shape === 0 /* CIRCLE */) {
                    rx = ry = Math.max(distance(x, y), distance(x, y - height), distance(x - width, y), distance(x - width, y - height));
                }
                else if (gradient.shape === 1 /* ELLIPSE */) {
                    // Compute the ratio ry/rx (which is to be the same as for "farthest-side")
                    var c = Math.max(Math.abs(y), Math.abs(y - height)) / Math.max(Math.abs(x), Math.abs(x - width));
                    var _b = findCorner(width, height, x, y, false), cx = _b[0], cy = _b[1];
                    rx = distance(cx - x, (cy - y) / c);
                    ry = c * rx;
                }
                break;
        }
        if (Array.isArray(gradient.size)) {
            rx = getAbsoluteValue(gradient.size[0], width);
            ry = gradient.size.length === 2 ? getAbsoluteValue(gradient.size[1], height) : rx;
        }
        return [rx, ry];
    };

    var linearGradient = function (context, tokens) {
        var angle$1 = deg(180);
        var stops = [];
        parseFunctionArgs(tokens).forEach(function (arg, i) {
            if (i === 0) {
                var firstToken = arg[0];
                if (firstToken.type === 20 /* IDENT_TOKEN */ && firstToken.value === 'to') {
                    angle$1 = parseNamedSide(arg);
                    return;
                }
                else if (isAngle(firstToken)) {
                    angle$1 = angle.parse(context, firstToken);
                    return;
                }
            }
            var colorStop = parseColorStop(context, arg);
            stops.push(colorStop);
        });
        return { angle: angle$1, stops: stops, type: 1 /* LINEAR_GRADIENT */ };
    };

    var prefixLinearGradient = function (context, tokens) {
        var angle$1 = deg(180);
        var stops = [];
        parseFunctionArgs(tokens).forEach(function (arg, i) {
            if (i === 0) {
                var firstToken = arg[0];
                if (firstToken.type === 20 /* IDENT_TOKEN */ &&
                    ['top', 'left', 'right', 'bottom'].indexOf(firstToken.value) !== -1) {
                    angle$1 = parseNamedSide(arg);
                    return;
                }
                else if (isAngle(firstToken)) {
                    angle$1 = (angle.parse(context, firstToken) + deg(270)) % deg(360);
                    return;
                }
            }
            var colorStop = parseColorStop(context, arg);
            stops.push(colorStop);
        });
        return {
            angle: angle$1,
            stops: stops,
            type: 1 /* LINEAR_GRADIENT */
        };
    };

    var webkitGradient = function (context, tokens) {
        var angle = deg(180);
        var stops = [];
        var type = 1 /* LINEAR_GRADIENT */;
        var shape = 0 /* CIRCLE */;
        var size = 3 /* FARTHEST_CORNER */;
        var position = [];
        parseFunctionArgs(tokens).forEach(function (arg, i) {
            var firstToken = arg[0];
            if (i === 0) {
                if (isIdentToken(firstToken) && firstToken.value === 'linear') {
                    type = 1 /* LINEAR_GRADIENT */;
                    return;
                }
                else if (isIdentToken(firstToken) && firstToken.value === 'radial') {
                    type = 2 /* RADIAL_GRADIENT */;
                    return;
                }
            }
            if (firstToken.type === 18 /* FUNCTION */) {
                if (firstToken.name === 'from') {
                    var color = color$1.parse(context, firstToken.values[0]);
                    stops.push({ stop: ZERO_LENGTH, color: color });
                }
                else if (firstToken.name === 'to') {
                    var color = color$1.parse(context, firstToken.values[0]);
                    stops.push({ stop: HUNDRED_PERCENT, color: color });
                }
                else if (firstToken.name === 'color-stop') {
                    var values = firstToken.values.filter(nonFunctionArgSeparator);
                    if (values.length === 2) {
                        var color = color$1.parse(context, values[1]);
                        var stop_1 = values[0];
                        if (isNumberToken(stop_1)) {
                            stops.push({
                                stop: { type: 16 /* PERCENTAGE_TOKEN */, number: stop_1.number * 100, flags: stop_1.flags },
                                color: color
                            });
                        }
                    }
                }
            }
        });
        return type === 1 /* LINEAR_GRADIENT */
            ? {
                angle: (angle + deg(180)) % deg(360),
                stops: stops,
                type: type
            }
            : { size: size, shape: shape, stops: stops, position: position, type: type };
    };

    var CLOSEST_SIDE = 'closest-side';
    var FARTHEST_SIDE = 'farthest-side';
    var CLOSEST_CORNER = 'closest-corner';
    var FARTHEST_CORNER = 'farthest-corner';
    var CIRCLE = 'circle';
    var ELLIPSE = 'ellipse';
    var COVER = 'cover';
    var CONTAIN = 'contain';
    var radialGradient = function (context, tokens) {
        var shape = 0 /* CIRCLE */;
        var size = 3 /* FARTHEST_CORNER */;
        var stops = [];
        var position = [];
        parseFunctionArgs(tokens).forEach(function (arg, i) {
            var isColorStop = true;
            if (i === 0) {
                var isAtPosition_1 = false;
                isColorStop = arg.reduce(function (acc, token) {
                    if (isAtPosition_1) {
                        if (isIdentToken(token)) {
                            switch (token.value) {
                                case 'center':
                                    position.push(FIFTY_PERCENT);
                                    return acc;
                                case 'top':
                                case 'left':
                                    position.push(ZERO_LENGTH);
                                    return acc;
                                case 'right':
                                case 'bottom':
                                    position.push(HUNDRED_PERCENT);
                                    return acc;
                            }
                        }
                        else if (isLengthPercentage(token) || isLength(token)) {
                            position.push(token);
                        }
                    }
                    else if (isIdentToken(token)) {
                        switch (token.value) {
                            case CIRCLE:
                                shape = 0 /* CIRCLE */;
                                return false;
                            case ELLIPSE:
                                shape = 1 /* ELLIPSE */;
                                return false;
                            case 'at':
                                isAtPosition_1 = true;
                                return false;
                            case CLOSEST_SIDE:
                                size = 0 /* CLOSEST_SIDE */;
                                return false;
                            case COVER:
                            case FARTHEST_SIDE:
                                size = 1 /* FARTHEST_SIDE */;
                                return false;
                            case CONTAIN:
                            case CLOSEST_CORNER:
                                size = 2 /* CLOSEST_CORNER */;
                                return false;
                            case FARTHEST_CORNER:
                                size = 3 /* FARTHEST_CORNER */;
                                return false;
                        }
                    }
                    else if (isLength(token) || isLengthPercentage(token)) {
                        if (!Array.isArray(size)) {
                            size = [];
                        }
                        size.push(token);
                        return false;
                    }
                    return acc;
                }, isColorStop);
            }
            if (isColorStop) {
                var colorStop = parseColorStop(context, arg);
                stops.push(colorStop);
            }
        });
        return { size: size, shape: shape, stops: stops, position: position, type: 2 /* RADIAL_GRADIENT */ };
    };

    var prefixRadialGradient = function (context, tokens) {
        var shape = 0 /* CIRCLE */;
        var size = 3 /* FARTHEST_CORNER */;
        var stops = [];
        var position = [];
        parseFunctionArgs(tokens).forEach(function (arg, i) {
            var isColorStop = true;
            if (i === 0) {
                isColorStop = arg.reduce(function (acc, token) {
                    if (isIdentToken(token)) {
                        switch (token.value) {
                            case 'center':
                                position.push(FIFTY_PERCENT);
                                return false;
                            case 'top':
                            case 'left':
                                position.push(ZERO_LENGTH);
                                return false;
                            case 'right':
                            case 'bottom':
                                position.push(HUNDRED_PERCENT);
                                return false;
                        }
                    }
                    else if (isLengthPercentage(token) || isLength(token)) {
                        position.push(token);
                        return false;
                    }
                    return acc;
                }, isColorStop);
            }
            else if (i === 1) {
                isColorStop = arg.reduce(function (acc, token) {
                    if (isIdentToken(token)) {
                        switch (token.value) {
                            case CIRCLE:
                                shape = 0 /* CIRCLE */;
                                return false;
                            case ELLIPSE:
                                shape = 1 /* ELLIPSE */;
                                return false;
                            case CONTAIN:
                            case CLOSEST_SIDE:
                                size = 0 /* CLOSEST_SIDE */;
                                return false;
                            case FARTHEST_SIDE:
                                size = 1 /* FARTHEST_SIDE */;
                                return false;
                            case CLOSEST_CORNER:
                                size = 2 /* CLOSEST_CORNER */;
                                return false;
                            case COVER:
                            case FARTHEST_CORNER:
                                size = 3 /* FARTHEST_CORNER */;
                                return false;
                        }
                    }
                    else if (isLength(token) || isLengthPercentage(token)) {
                        if (!Array.isArray(size)) {
                            size = [];
                        }
                        size.push(token);
                        return false;
                    }
                    return acc;
                }, isColorStop);
            }
            if (isColorStop) {
                var colorStop = parseColorStop(context, arg);
                stops.push(colorStop);
            }
        });
        return { size: size, shape: shape, stops: stops, position: position, type: 2 /* RADIAL_GRADIENT */ };
    };

    var isLinearGradient = function (background) {
        return background.type === 1 /* LINEAR_GRADIENT */;
    };
    var isRadialGradient = function (background) {
        return background.type === 2 /* RADIAL_GRADIENT */;
    };
    var image = {
        name: 'image',
        parse: function (context, value) {
            if (value.type === 22 /* URL_TOKEN */) {
                var image_1 = { url: value.value, type: 0 /* URL */ };
                context.cache.addImage(value.value);
                return image_1;
            }
            if (value.type === 18 /* FUNCTION */) {
                var imageFunction = SUPPORTED_IMAGE_FUNCTIONS[value.name];
                if (typeof imageFunction === 'undefined') {
                    throw new Error("Attempting to parse an unsupported image function \"" + value.name + "\"");
                }
                return imageFunction(context, value.values);
            }
            throw new Error("Unsupported image type " + value.type);
        }
    };
    function isSupportedImage(value) {
        return (!(value.type === 20 /* IDENT_TOKEN */ && value.value === 'none') &&
            (value.type !== 18 /* FUNCTION */ || !!SUPPORTED_IMAGE_FUNCTIONS[value.name]));
    }
    var SUPPORTED_IMAGE_FUNCTIONS = {
        'linear-gradient': linearGradient,
        '-moz-linear-gradient': prefixLinearGradient,
        '-ms-linear-gradient': prefixLinearGradient,
        '-o-linear-gradient': prefixLinearGradient,
        '-webkit-linear-gradient': prefixLinearGradient,
        'radial-gradient': radialGradient,
        '-moz-radial-gradient': prefixRadialGradient,
        '-ms-radial-gradient': prefixRadialGradient,
        '-o-radial-gradient': prefixRadialGradient,
        '-webkit-radial-gradient': prefixRadialGradient,
        '-webkit-gradient': webkitGradient
    };

    var backgroundImage = {
        name: 'background-image',
        initialValue: 'none',
        type: 1 /* LIST */,
        prefix: false,
        parse: function (context, tokens) {
            if (tokens.length === 0) {
                return [];
            }
            var first = tokens[0];
            if (first.type === 20 /* IDENT_TOKEN */ && first.value === 'none') {
                return [];
            }
            return tokens
                .filter(function (value) { return nonFunctionArgSeparator(value) && isSupportedImage(value); })
                .map(function (value) { return image.parse(context, value); });
        }
    };

    var backgroundOrigin = {
        name: 'background-origin',
        initialValue: 'border-box',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            return tokens.map(function (token) {
                if (isIdentToken(token)) {
                    switch (token.value) {
                        case 'padding-box':
                            return 1 /* PADDING_BOX */;
                        case 'content-box':
                            return 2 /* CONTENT_BOX */;
                    }
                }
                return 0 /* BORDER_BOX */;
            });
        }
    };

    var backgroundPosition = {
        name: 'background-position',
        initialValue: '0% 0%',
        type: 1 /* LIST */,
        prefix: false,
        parse: function (_context, tokens) {
            return parseFunctionArgs(tokens)
                .map(function (values) { return values.filter(isLengthPercentage); })
                .map(parseLengthPercentageTuple);
        }
    };

    var backgroundRepeat = {
        name: 'background-repeat',
        initialValue: 'repeat',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            return parseFunctionArgs(tokens)
                .map(function (values) {
                return values
                    .filter(isIdentToken)
                    .map(function (token) { return token.value; })
                    .join(' ');
            })
                .map(parseBackgroundRepeat);
        }
    };
    var parseBackgroundRepeat = function (value) {
        switch (value) {
            case 'no-repeat':
                return 1 /* NO_REPEAT */;
            case 'repeat-x':
            case 'repeat no-repeat':
                return 2 /* REPEAT_X */;
            case 'repeat-y':
            case 'no-repeat repeat':
                return 3 /* REPEAT_Y */;
            case 'repeat':
            default:
                return 0 /* REPEAT */;
        }
    };

    var BACKGROUND_SIZE;
    (function (BACKGROUND_SIZE) {
        BACKGROUND_SIZE["AUTO"] = "auto";
        BACKGROUND_SIZE["CONTAIN"] = "contain";
        BACKGROUND_SIZE["COVER"] = "cover";
    })(BACKGROUND_SIZE || (BACKGROUND_SIZE = {}));
    var backgroundSize = {
        name: 'background-size',
        initialValue: '0',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            return parseFunctionArgs(tokens).map(function (values) { return values.filter(isBackgroundSizeInfoToken); });
        }
    };
    var isBackgroundSizeInfoToken = function (value) {
        return isIdentToken(value) || isLengthPercentage(value);
    };

    var borderColorForSide = function (side) { return ({
        name: "border-" + side + "-color",
        initialValue: 'transparent',
        prefix: false,
        type: 3 /* TYPE_VALUE */,
        format: 'color'
    }); };
    var borderTopColor = borderColorForSide('top');
    var borderRightColor = borderColorForSide('right');
    var borderBottomColor = borderColorForSide('bottom');
    var borderLeftColor = borderColorForSide('left');

    var borderRadiusForSide = function (side) { return ({
        name: "border-radius-" + side,
        initialValue: '0 0',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            return parseLengthPercentageTuple(tokens.filter(isLengthPercentage));
        }
    }); };
    var borderTopLeftRadius = borderRadiusForSide('top-left');
    var borderTopRightRadius = borderRadiusForSide('top-right');
    var borderBottomRightRadius = borderRadiusForSide('bottom-right');
    var borderBottomLeftRadius = borderRadiusForSide('bottom-left');

    var borderStyleForSide = function (side) { return ({
        name: "border-" + side + "-style",
        initialValue: 'solid',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, style) {
            switch (style) {
                case 'none':
                    return 0 /* NONE */;
                case 'dashed':
                    return 2 /* DASHED */;
                case 'dotted':
                    return 3 /* DOTTED */;
                case 'double':
                    return 4 /* DOUBLE */;
            }
            return 1 /* SOLID */;
        }
    }); };
    var borderTopStyle = borderStyleForSide('top');
    var borderRightStyle = borderStyleForSide('right');
    var borderBottomStyle = borderStyleForSide('bottom');
    var borderLeftStyle = borderStyleForSide('left');

    var borderWidthForSide = function (side) { return ({
        name: "border-" + side + "-width",
        initialValue: '0',
        type: 0 /* VALUE */,
        prefix: false,
        parse: function (_context, token) {
            if (isDimensionToken(token)) {
                return token.number;
            }
            return 0;
        }
    }); };
    var borderTopWidth = borderWidthForSide('top');
    var borderRightWidth = borderWidthForSide('right');
    var borderBottomWidth = borderWidthForSide('bottom');
    var borderLeftWidth = borderWidthForSide('left');

    var color = {
        name: "color",
        initialValue: 'transparent',
        prefix: false,
        type: 3 /* TYPE_VALUE */,
        format: 'color'
    };

    var direction = {
        name: 'direction',
        initialValue: 'ltr',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, direction) {
            switch (direction) {
                case 'rtl':
                    return 1 /* RTL */;
                case 'ltr':
                default:
                    return 0 /* LTR */;
            }
        }
    };

    var display = {
        name: 'display',
        initialValue: 'inline-block',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            return tokens.filter(isIdentToken).reduce(function (bit, token) {
                return bit | parseDisplayValue(token.value);
            }, 0 /* NONE */);
        }
    };
    var parseDisplayValue = function (display) {
        switch (display) {
            case 'block':
            case '-webkit-box':
                return 2 /* BLOCK */;
            case 'inline':
                return 4 /* INLINE */;
            case 'run-in':
                return 8 /* RUN_IN */;
            case 'flow':
                return 16 /* FLOW */;
            case 'flow-root':
                return 32 /* FLOW_ROOT */;
            case 'table':
                return 64 /* TABLE */;
            case 'flex':
            case '-webkit-flex':
                return 128 /* FLEX */;
            case 'grid':
            case '-ms-grid':
                return 256 /* GRID */;
            case 'ruby':
                return 512 /* RUBY */;
            case 'subgrid':
                return 1024 /* SUBGRID */;
            case 'list-item':
                return 2048 /* LIST_ITEM */;
            case 'table-row-group':
                return 4096 /* TABLE_ROW_GROUP */;
            case 'table-header-group':
                return 8192 /* TABLE_HEADER_GROUP */;
            case 'table-footer-group':
                return 16384 /* TABLE_FOOTER_GROUP */;
            case 'table-row':
                return 32768 /* TABLE_ROW */;
            case 'table-cell':
                return 65536 /* TABLE_CELL */;
            case 'table-column-group':
                return 131072 /* TABLE_COLUMN_GROUP */;
            case 'table-column':
                return 262144 /* TABLE_COLUMN */;
            case 'table-caption':
                return 524288 /* TABLE_CAPTION */;
            case 'ruby-base':
                return 1048576 /* RUBY_BASE */;
            case 'ruby-text':
                return 2097152 /* RUBY_TEXT */;
            case 'ruby-base-container':
                return 4194304 /* RUBY_BASE_CONTAINER */;
            case 'ruby-text-container':
                return 8388608 /* RUBY_TEXT_CONTAINER */;
            case 'contents':
                return 16777216 /* CONTENTS */;
            case 'inline-block':
                return 33554432 /* INLINE_BLOCK */;
            case 'inline-list-item':
                return 67108864 /* INLINE_LIST_ITEM */;
            case 'inline-table':
                return 134217728 /* INLINE_TABLE */;
            case 'inline-flex':
                return 268435456 /* INLINE_FLEX */;
            case 'inline-grid':
                return 536870912 /* INLINE_GRID */;
        }
        return 0 /* NONE */;
    };

    var float = {
        name: 'float',
        initialValue: 'none',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, float) {
            switch (float) {
                case 'left':
                    return 1 /* LEFT */;
                case 'right':
                    return 2 /* RIGHT */;
                case 'inline-start':
                    return 3 /* INLINE_START */;
                case 'inline-end':
                    return 4 /* INLINE_END */;
            }
            return 0 /* NONE */;
        }
    };

    var letterSpacing = {
        name: 'letter-spacing',
        initialValue: '0',
        prefix: false,
        type: 0 /* VALUE */,
        parse: function (_context, token) {
            if (token.type === 20 /* IDENT_TOKEN */ && token.value === 'normal') {
                return 0;
            }
            if (token.type === 17 /* NUMBER_TOKEN */) {
                return token.number;
            }
            if (token.type === 15 /* DIMENSION_TOKEN */) {
                return token.number;
            }
            return 0;
        }
    };

    var LINE_BREAK;
    (function (LINE_BREAK) {
        LINE_BREAK["NORMAL"] = "normal";
        LINE_BREAK["STRICT"] = "strict";
    })(LINE_BREAK || (LINE_BREAK = {}));
    var lineBreak = {
        name: 'line-break',
        initialValue: 'normal',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, lineBreak) {
            switch (lineBreak) {
                case 'strict':
                    return LINE_BREAK.STRICT;
                case 'normal':
                default:
                    return LINE_BREAK.NORMAL;
            }
        }
    };

    var lineHeight = {
        name: 'line-height',
        initialValue: 'normal',
        prefix: false,
        type: 4 /* TOKEN_VALUE */
    };
    var computeLineHeight = function (token, fontSize) {
        if (isIdentToken(token) && token.value === 'normal') {
            return 1.2 * fontSize;
        }
        else if (token.type === 17 /* NUMBER_TOKEN */) {
            return fontSize * token.number;
        }
        else if (isLengthPercentage(token)) {
            return getAbsoluteValue(token, fontSize);
        }
        return fontSize;
    };

    var listStyleImage = {
        name: 'list-style-image',
        initialValue: 'none',
        type: 0 /* VALUE */,
        prefix: false,
        parse: function (context, token) {
            if (token.type === 20 /* IDENT_TOKEN */ && token.value === 'none') {
                return null;
            }
            return image.parse(context, token);
        }
    };

    var listStylePosition = {
        name: 'list-style-position',
        initialValue: 'outside',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, position) {
            switch (position) {
                case 'inside':
                    return 0 /* INSIDE */;
                case 'outside':
                default:
                    return 1 /* OUTSIDE */;
            }
        }
    };

    var listStyleType = {
        name: 'list-style-type',
        initialValue: 'none',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, type) {
            switch (type) {
                case 'disc':
                    return 0 /* DISC */;
                case 'circle':
                    return 1 /* CIRCLE */;
                case 'square':
                    return 2 /* SQUARE */;
                case 'decimal':
                    return 3 /* DECIMAL */;
                case 'cjk-decimal':
                    return 4 /* CJK_DECIMAL */;
                case 'decimal-leading-zero':
                    return 5 /* DECIMAL_LEADING_ZERO */;
                case 'lower-roman':
                    return 6 /* LOWER_ROMAN */;
                case 'upper-roman':
                    return 7 /* UPPER_ROMAN */;
                case 'lower-greek':
                    return 8 /* LOWER_GREEK */;
                case 'lower-alpha':
                    return 9 /* LOWER_ALPHA */;
                case 'upper-alpha':
                    return 10 /* UPPER_ALPHA */;
                case 'arabic-indic':
                    return 11 /* ARABIC_INDIC */;
                case 'armenian':
                    return 12 /* ARMENIAN */;
                case 'bengali':
                    return 13 /* BENGALI */;
                case 'cambodian':
                    return 14 /* CAMBODIAN */;
                case 'cjk-earthly-branch':
                    return 15 /* CJK_EARTHLY_BRANCH */;
                case 'cjk-heavenly-stem':
                    return 16 /* CJK_HEAVENLY_STEM */;
                case 'cjk-ideographic':
                    return 17 /* CJK_IDEOGRAPHIC */;
                case 'devanagari':
                    return 18 /* DEVANAGARI */;
                case 'ethiopic-numeric':
                    return 19 /* ETHIOPIC_NUMERIC */;
                case 'georgian':
                    return 20 /* GEORGIAN */;
                case 'gujarati':
                    return 21 /* GUJARATI */;
                case 'gurmukhi':
                    return 22 /* GURMUKHI */;
                case 'hebrew':
                    return 22 /* HEBREW */;
                case 'hiragana':
                    return 23 /* HIRAGANA */;
                case 'hiragana-iroha':
                    return 24 /* HIRAGANA_IROHA */;
                case 'japanese-formal':
                    return 25 /* JAPANESE_FORMAL */;
                case 'japanese-informal':
                    return 26 /* JAPANESE_INFORMAL */;
                case 'kannada':
                    return 27 /* KANNADA */;
                case 'katakana':
                    return 28 /* KATAKANA */;
                case 'katakana-iroha':
                    return 29 /* KATAKANA_IROHA */;
                case 'khmer':
                    return 30 /* KHMER */;
                case 'korean-hangul-formal':
                    return 31 /* KOREAN_HANGUL_FORMAL */;
                case 'korean-hanja-formal':
                    return 32 /* KOREAN_HANJA_FORMAL */;
                case 'korean-hanja-informal':
                    return 33 /* KOREAN_HANJA_INFORMAL */;
                case 'lao':
                    return 34 /* LAO */;
                case 'lower-armenian':
                    return 35 /* LOWER_ARMENIAN */;
                case 'malayalam':
                    return 36 /* MALAYALAM */;
                case 'mongolian':
                    return 37 /* MONGOLIAN */;
                case 'myanmar':
                    return 38 /* MYANMAR */;
                case 'oriya':
                    return 39 /* ORIYA */;
                case 'persian':
                    return 40 /* PERSIAN */;
                case 'simp-chinese-formal':
                    return 41 /* SIMP_CHINESE_FORMAL */;
                case 'simp-chinese-informal':
                    return 42 /* SIMP_CHINESE_INFORMAL */;
                case 'tamil':
                    return 43 /* TAMIL */;
                case 'telugu':
                    return 44 /* TELUGU */;
                case 'thai':
                    return 45 /* THAI */;
                case 'tibetan':
                    return 46 /* TIBETAN */;
                case 'trad-chinese-formal':
                    return 47 /* TRAD_CHINESE_FORMAL */;
                case 'trad-chinese-informal':
                    return 48 /* TRAD_CHINESE_INFORMAL */;
                case 'upper-armenian':
                    return 49 /* UPPER_ARMENIAN */;
                case 'disclosure-open':
                    return 50 /* DISCLOSURE_OPEN */;
                case 'disclosure-closed':
                    return 51 /* DISCLOSURE_CLOSED */;
                case 'none':
                default:
                    return -1 /* NONE */;
            }
        }
    };

    var marginForSide = function (side) { return ({
        name: "margin-" + side,
        initialValue: '0',
        prefix: false,
        type: 4 /* TOKEN_VALUE */
    }); };
    var marginTop = marginForSide('top');
    var marginRight = marginForSide('right');
    var marginBottom = marginForSide('bottom');
    var marginLeft = marginForSide('left');

    var overflow = {
        name: 'overflow',
        initialValue: 'visible',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            return tokens.filter(isIdentToken).map(function (overflow) {
                switch (overflow.value) {
                    case 'hidden':
                        return 1 /* HIDDEN */;
                    case 'scroll':
                        return 2 /* SCROLL */;
                    case 'clip':
                        return 3 /* CLIP */;
                    case 'auto':
                        return 4 /* AUTO */;
                    case 'visible':
                    default:
                        return 0 /* VISIBLE */;
                }
            });
        }
    };

    var overflowWrap = {
        name: 'overflow-wrap',
        initialValue: 'normal',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, overflow) {
            switch (overflow) {
                case 'break-word':
                    return "break-word" /* BREAK_WORD */;
                case 'normal':
                default:
                    return "normal" /* NORMAL */;
            }
        }
    };

    var paddingForSide = function (side) { return ({
        name: "padding-" + side,
        initialValue: '0',
        prefix: false,
        type: 3 /* TYPE_VALUE */,
        format: 'length-percentage'
    }); };
    var paddingTop = paddingForSide('top');
    var paddingRight = paddingForSide('right');
    var paddingBottom = paddingForSide('bottom');
    var paddingLeft = paddingForSide('left');

    var textAlign = {
        name: 'text-align',
        initialValue: 'left',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, textAlign) {
            switch (textAlign) {
                case 'right':
                    return 2 /* RIGHT */;
                case 'center':
                case 'justify':
                    return 1 /* CENTER */;
                case 'left':
                default:
                    return 0 /* LEFT */;
            }
        }
    };

    var position = {
        name: 'position',
        initialValue: 'static',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, position) {
            switch (position) {
                case 'relative':
                    return 1 /* RELATIVE */;
                case 'absolute':
                    return 2 /* ABSOLUTE */;
                case 'fixed':
                    return 3 /* FIXED */;
                case 'sticky':
                    return 4 /* STICKY */;
            }
            return 0 /* STATIC */;
        }
    };

    var textShadow = {
        name: 'text-shadow',
        initialValue: 'none',
        type: 1 /* LIST */,
        prefix: false,
        parse: function (context, tokens) {
            if (tokens.length === 1 && isIdentWithValue(tokens[0], 'none')) {
                return [];
            }
            return parseFunctionArgs(tokens).map(function (values) {
                var shadow = {
                    color: COLORS.TRANSPARENT,
                    offsetX: ZERO_LENGTH,
                    offsetY: ZERO_LENGTH,
                    blur: ZERO_LENGTH
                };
                var c = 0;
                for (var i = 0; i < values.length; i++) {
                    var token = values[i];
                    if (isLength(token)) {
                        if (c === 0) {
                            shadow.offsetX = token;
                        }
                        else if (c === 1) {
                            shadow.offsetY = token;
                        }
                        else {
                            shadow.blur = token;
                        }
                        c++;
                    }
                    else {
                        shadow.color = color$1.parse(context, token);
                    }
                }
                return shadow;
            });
        }
    };

    var textTransform = {
        name: 'text-transform',
        initialValue: 'none',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, textTransform) {
            switch (textTransform) {
                case 'uppercase':
                    return 2 /* UPPERCASE */;
                case 'lowercase':
                    return 1 /* LOWERCASE */;
                case 'capitalize':
                    return 3 /* CAPITALIZE */;
            }
            return 0 /* NONE */;
        }
    };

    var transform$1 = {
        name: 'transform',
        initialValue: 'none',
        prefix: true,
        type: 0 /* VALUE */,
        parse: function (_context, token) {
            if (token.type === 20 /* IDENT_TOKEN */ && token.value === 'none') {
                return null;
            }
            if (token.type === 18 /* FUNCTION */) {
                var transformFunction = SUPPORTED_TRANSFORM_FUNCTIONS[token.name];
                if (typeof transformFunction === 'undefined') {
                    throw new Error("Attempting to parse an unsupported transform function \"" + token.name + "\"");
                }
                return transformFunction(token.values);
            }
            return null;
        }
    };
    var matrix = function (args) {
        var values = args.filter(function (arg) { return arg.type === 17 /* NUMBER_TOKEN */; }).map(function (arg) { return arg.number; });
        return values.length === 6 ? values : null;
    };
    // doesn't support 3D transforms at the moment
    var matrix3d = function (args) {
        var values = args.filter(function (arg) { return arg.type === 17 /* NUMBER_TOKEN */; }).map(function (arg) { return arg.number; });
        var a1 = values[0], b1 = values[1]; values[2]; values[3]; var a2 = values[4], b2 = values[5]; values[6]; values[7]; values[8]; values[9]; values[10]; values[11]; var a4 = values[12], b4 = values[13]; values[14]; values[15];
        return values.length === 16 ? [a1, b1, a2, b2, a4, b4] : null;
    };
    var SUPPORTED_TRANSFORM_FUNCTIONS = {
        matrix: matrix,
        matrix3d: matrix3d
    };

    var DEFAULT_VALUE = {
        type: 16 /* PERCENTAGE_TOKEN */,
        number: 50,
        flags: FLAG_INTEGER
    };
    var DEFAULT = [DEFAULT_VALUE, DEFAULT_VALUE];
    var transformOrigin = {
        name: 'transform-origin',
        initialValue: '50% 50%',
        prefix: true,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            var origins = tokens.filter(isLengthPercentage);
            if (origins.length !== 2) {
                return DEFAULT;
            }
            return [origins[0], origins[1]];
        }
    };

    var visibility = {
        name: 'visible',
        initialValue: 'none',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, visibility) {
            switch (visibility) {
                case 'hidden':
                    return 1 /* HIDDEN */;
                case 'collapse':
                    return 2 /* COLLAPSE */;
                case 'visible':
                default:
                    return 0 /* VISIBLE */;
            }
        }
    };

    var WORD_BREAK;
    (function (WORD_BREAK) {
        WORD_BREAK["NORMAL"] = "normal";
        WORD_BREAK["BREAK_ALL"] = "break-all";
        WORD_BREAK["KEEP_ALL"] = "keep-all";
    })(WORD_BREAK || (WORD_BREAK = {}));
    var wordBreak = {
        name: 'word-break',
        initialValue: 'normal',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, wordBreak) {
            switch (wordBreak) {
                case 'break-all':
                    return WORD_BREAK.BREAK_ALL;
                case 'keep-all':
                    return WORD_BREAK.KEEP_ALL;
                case 'normal':
                default:
                    return WORD_BREAK.NORMAL;
            }
        }
    };

    var zIndex = {
        name: 'z-index',
        initialValue: 'auto',
        prefix: false,
        type: 0 /* VALUE */,
        parse: function (_context, token) {
            if (token.type === 20 /* IDENT_TOKEN */) {
                return { auto: true, order: 0 };
            }
            if (isNumberToken(token)) {
                return { auto: false, order: token.number };
            }
            throw new Error("Invalid z-index number parsed");
        }
    };

    var time = {
        name: 'time',
        parse: function (_context, value) {
            if (value.type === 15 /* DIMENSION_TOKEN */) {
                switch (value.unit.toLowerCase()) {
                    case 's':
                        return 1000 * value.number;
                    case 'ms':
                        return value.number;
                }
            }
            throw new Error("Unsupported time type");
        }
    };

    var opacity = {
        name: 'opacity',
        initialValue: '1',
        type: 0 /* VALUE */,
        prefix: false,
        parse: function (_context, token) {
            if (isNumberToken(token)) {
                return token.number;
            }
            return 1;
        }
    };

    var textDecorationColor = {
        name: "text-decoration-color",
        initialValue: 'transparent',
        prefix: false,
        type: 3 /* TYPE_VALUE */,
        format: 'color'
    };

    var textDecorationLine = {
        name: 'text-decoration-line',
        initialValue: 'none',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            return tokens
                .filter(isIdentToken)
                .map(function (token) {
                switch (token.value) {
                    case 'underline':
                        return 1 /* UNDERLINE */;
                    case 'overline':
                        return 2 /* OVERLINE */;
                    case 'line-through':
                        return 3 /* LINE_THROUGH */;
                    case 'none':
                        return 4 /* BLINK */;
                }
                return 0 /* NONE */;
            })
                .filter(function (line) { return line !== 0 /* NONE */; });
        }
    };

    var fontFamily = {
        name: "font-family",
        initialValue: '',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            var accumulator = [];
            var results = [];
            tokens.forEach(function (token) {
                switch (token.type) {
                    case 20 /* IDENT_TOKEN */:
                    case 0 /* STRING_TOKEN */:
                        accumulator.push(token.value);
                        break;
                    case 17 /* NUMBER_TOKEN */:
                        accumulator.push(token.number.toString());
                        break;
                    case 4 /* COMMA_TOKEN */:
                        results.push(accumulator.join(' '));
                        accumulator.length = 0;
                        break;
                }
            });
            if (accumulator.length) {
                results.push(accumulator.join(' '));
            }
            return results.map(function (result) { return (result.indexOf(' ') === -1 ? result : "'" + result + "'"); });
        }
    };

    var fontSize = {
        name: "font-size",
        initialValue: '0',
        prefix: false,
        type: 3 /* TYPE_VALUE */,
        format: 'length'
    };

    var fontWeight = {
        name: 'font-weight',
        initialValue: 'normal',
        type: 0 /* VALUE */,
        prefix: false,
        parse: function (_context, token) {
            if (isNumberToken(token)) {
                return token.number;
            }
            if (isIdentToken(token)) {
                switch (token.value) {
                    case 'bold':
                        return 700;
                    case 'normal':
                    default:
                        return 400;
                }
            }
            return 400;
        }
    };

    var fontVariant = {
        name: 'font-variant',
        initialValue: 'none',
        type: 1 /* LIST */,
        prefix: false,
        parse: function (_context, tokens) {
            return tokens.filter(isIdentToken).map(function (token) { return token.value; });
        }
    };

    var fontStyle = {
        name: 'font-style',
        initialValue: 'normal',
        prefix: false,
        type: 2 /* IDENT_VALUE */,
        parse: function (_context, overflow) {
            switch (overflow) {
                case 'oblique':
                    return "oblique" /* OBLIQUE */;
                case 'italic':
                    return "italic" /* ITALIC */;
                case 'normal':
                default:
                    return "normal" /* NORMAL */;
            }
        }
    };

    var contains = function (bit, value) { return (bit & value) !== 0; };

    var content = {
        name: 'content',
        initialValue: 'none',
        type: 1 /* LIST */,
        prefix: false,
        parse: function (_context, tokens) {
            if (tokens.length === 0) {
                return [];
            }
            var first = tokens[0];
            if (first.type === 20 /* IDENT_TOKEN */ && first.value === 'none') {
                return [];
            }
            return tokens;
        }
    };

    var counterIncrement = {
        name: 'counter-increment',
        initialValue: 'none',
        prefix: true,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            if (tokens.length === 0) {
                return null;
            }
            var first = tokens[0];
            if (first.type === 20 /* IDENT_TOKEN */ && first.value === 'none') {
                return null;
            }
            var increments = [];
            var filtered = tokens.filter(nonWhiteSpace);
            for (var i = 0; i < filtered.length; i++) {
                var counter = filtered[i];
                var next = filtered[i + 1];
                if (counter.type === 20 /* IDENT_TOKEN */) {
                    var increment = next && isNumberToken(next) ? next.number : 1;
                    increments.push({ counter: counter.value, increment: increment });
                }
            }
            return increments;
        }
    };

    var counterReset = {
        name: 'counter-reset',
        initialValue: 'none',
        prefix: true,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            if (tokens.length === 0) {
                return [];
            }
            var resets = [];
            var filtered = tokens.filter(nonWhiteSpace);
            for (var i = 0; i < filtered.length; i++) {
                var counter = filtered[i];
                var next = filtered[i + 1];
                if (isIdentToken(counter) && counter.value !== 'none') {
                    var reset = next && isNumberToken(next) ? next.number : 0;
                    resets.push({ counter: counter.value, reset: reset });
                }
            }
            return resets;
        }
    };

    var duration = {
        name: 'duration',
        initialValue: '0s',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (context, tokens) {
            return tokens.filter(isDimensionToken).map(function (token) { return time.parse(context, token); });
        }
    };

    var quotes = {
        name: 'quotes',
        initialValue: 'none',
        prefix: true,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            if (tokens.length === 0) {
                return null;
            }
            var first = tokens[0];
            if (first.type === 20 /* IDENT_TOKEN */ && first.value === 'none') {
                return null;
            }
            var quotes = [];
            var filtered = tokens.filter(isStringToken);
            if (filtered.length % 2 !== 0) {
                return null;
            }
            for (var i = 0; i < filtered.length; i += 2) {
                var open_1 = filtered[i].value;
                var close_1 = filtered[i + 1].value;
                quotes.push({ open: open_1, close: close_1 });
            }
            return quotes;
        }
    };
    var getQuote = function (quotes, depth, open) {
        if (!quotes) {
            return '';
        }
        var quote = quotes[Math.min(depth, quotes.length - 1)];
        if (!quote) {
            return '';
        }
        return open ? quote.open : quote.close;
    };

    var boxShadow = {
        name: 'box-shadow',
        initialValue: 'none',
        type: 1 /* LIST */,
        prefix: false,
        parse: function (context, tokens) {
            if (tokens.length === 1 && isIdentWithValue(tokens[0], 'none')) {
                return [];
            }
            return parseFunctionArgs(tokens).map(function (values) {
                var shadow = {
                    color: 0x000000ff,
                    offsetX: ZERO_LENGTH,
                    offsetY: ZERO_LENGTH,
                    blur: ZERO_LENGTH,
                    spread: ZERO_LENGTH,
                    inset: false
                };
                var c = 0;
                for (var i = 0; i < values.length; i++) {
                    var token = values[i];
                    if (isIdentWithValue(token, 'inset')) {
                        shadow.inset = true;
                    }
                    else if (isLength(token)) {
                        if (c === 0) {
                            shadow.offsetX = token;
                        }
                        else if (c === 1) {
                            shadow.offsetY = token;
                        }
                        else if (c === 2) {
                            shadow.blur = token;
                        }
                        else {
                            shadow.spread = token;
                        }
                        c++;
                    }
                    else {
                        shadow.color = color$1.parse(context, token);
                    }
                }
                return shadow;
            });
        }
    };

    var paintOrder = {
        name: 'paint-order',
        initialValue: 'normal',
        prefix: false,
        type: 1 /* LIST */,
        parse: function (_context, tokens) {
            var DEFAULT_VALUE = [0 /* FILL */, 1 /* STROKE */, 2 /* MARKERS */];
            var layers = [];
            tokens.filter(isIdentToken).forEach(function (token) {
                switch (token.value) {
                    case 'stroke':
                        layers.push(1 /* STROKE */);
                        break;
                    case 'fill':
                        layers.push(0 /* FILL */);
                        break;
                    case 'markers':
                        layers.push(2 /* MARKERS */);
                        break;
                }
            });
            DEFAULT_VALUE.forEach(function (value) {
                if (layers.indexOf(value) === -1) {
                    layers.push(value);
                }
            });
            return layers;
        }
    };

    var webkitTextStrokeColor = {
        name: "-webkit-text-stroke-color",
        initialValue: 'currentcolor',
        prefix: false,
        type: 3 /* TYPE_VALUE */,
        format: 'color'
    };

    var webkitTextStrokeWidth = {
        name: "-webkit-text-stroke-width",
        initialValue: '0',
        type: 0 /* VALUE */,
        prefix: false,
        parse: function (_context, token) {
            if (isDimensionToken(token)) {
                return token.number;
            }
            return 0;
        }
    };

    var CSSParsedDeclaration = /** @class */ (function () {
        function CSSParsedDeclaration(context, declaration) {
            var _a, _b;
            this.animationDuration = parse(context, duration, declaration.animationDuration);
            this.backgroundClip = parse(context, backgroundClip, declaration.backgroundClip);
            this.backgroundColor = parse(context, backgroundColor, declaration.backgroundColor);
            this.backgroundImage = parse(context, backgroundImage, declaration.backgroundImage);
            this.backgroundOrigin = parse(context, backgroundOrigin, declaration.backgroundOrigin);
            this.backgroundPosition = parse(context, backgroundPosition, declaration.backgroundPosition);
            this.backgroundRepeat = parse(context, backgroundRepeat, declaration.backgroundRepeat);
            this.backgroundSize = parse(context, backgroundSize, declaration.backgroundSize);
            this.borderTopColor = parse(context, borderTopColor, declaration.borderTopColor);
            this.borderRightColor = parse(context, borderRightColor, declaration.borderRightColor);
            this.borderBottomColor = parse(context, borderBottomColor, declaration.borderBottomColor);
            this.borderLeftColor = parse(context, borderLeftColor, declaration.borderLeftColor);
            this.borderTopLeftRadius = parse(context, borderTopLeftRadius, declaration.borderTopLeftRadius);
            this.borderTopRightRadius = parse(context, borderTopRightRadius, declaration.borderTopRightRadius);
            this.borderBottomRightRadius = parse(context, borderBottomRightRadius, declaration.borderBottomRightRadius);
            this.borderBottomLeftRadius = parse(context, borderBottomLeftRadius, declaration.borderBottomLeftRadius);
            this.borderTopStyle = parse(context, borderTopStyle, declaration.borderTopStyle);
            this.borderRightStyle = parse(context, borderRightStyle, declaration.borderRightStyle);
            this.borderBottomStyle = parse(context, borderBottomStyle, declaration.borderBottomStyle);
            this.borderLeftStyle = parse(context, borderLeftStyle, declaration.borderLeftStyle);
            this.borderTopWidth = parse(context, borderTopWidth, declaration.borderTopWidth);
            this.borderRightWidth = parse(context, borderRightWidth, declaration.borderRightWidth);
            this.borderBottomWidth = parse(context, borderBottomWidth, declaration.borderBottomWidth);
            this.borderLeftWidth = parse(context, borderLeftWidth, declaration.borderLeftWidth);
            this.boxShadow = parse(context, boxShadow, declaration.boxShadow);
            this.color = parse(context, color, declaration.color);
            this.direction = parse(context, direction, declaration.direction);
            this.display = parse(context, display, declaration.display);
            this.float = parse(context, float, declaration.cssFloat);
            this.fontFamily = parse(context, fontFamily, declaration.fontFamily);
            this.fontSize = parse(context, fontSize, declaration.fontSize);
            this.fontStyle = parse(context, fontStyle, declaration.fontStyle);
            this.fontVariant = parse(context, fontVariant, declaration.fontVariant);
            this.fontWeight = parse(context, fontWeight, declaration.fontWeight);
            this.letterSpacing = parse(context, letterSpacing, declaration.letterSpacing);
            this.lineBreak = parse(context, lineBreak, declaration.lineBreak);
            this.lineHeight = parse(context, lineHeight, declaration.lineHeight);
            this.listStyleImage = parse(context, listStyleImage, declaration.listStyleImage);
            this.listStylePosition = parse(context, listStylePosition, declaration.listStylePosition);
            this.listStyleType = parse(context, listStyleType, declaration.listStyleType);
            this.marginTop = parse(context, marginTop, declaration.marginTop);
            this.marginRight = parse(context, marginRight, declaration.marginRight);
            this.marginBottom = parse(context, marginBottom, declaration.marginBottom);
            this.marginLeft = parse(context, marginLeft, declaration.marginLeft);
            this.opacity = parse(context, opacity, declaration.opacity);
            var overflowTuple = parse(context, overflow, declaration.overflow);
            this.overflowX = overflowTuple[0];
            this.overflowY = overflowTuple[overflowTuple.length > 1 ? 1 : 0];
            this.overflowWrap = parse(context, overflowWrap, declaration.overflowWrap);
            this.paddingTop = parse(context, paddingTop, declaration.paddingTop);
            this.paddingRight = parse(context, paddingRight, declaration.paddingRight);
            this.paddingBottom = parse(context, paddingBottom, declaration.paddingBottom);
            this.paddingLeft = parse(context, paddingLeft, declaration.paddingLeft);
            this.paintOrder = parse(context, paintOrder, declaration.paintOrder);
            this.position = parse(context, position, declaration.position);
            this.textAlign = parse(context, textAlign, declaration.textAlign);
            this.textDecorationColor = parse(context, textDecorationColor, (_a = declaration.textDecorationColor) !== null && _a !== void 0 ? _a : declaration.color);
            this.textDecorationLine = parse(context, textDecorationLine, (_b = declaration.textDecorationLine) !== null && _b !== void 0 ? _b : declaration.textDecoration);
            this.textShadow = parse(context, textShadow, declaration.textShadow);
            this.textTransform = parse(context, textTransform, declaration.textTransform);
            this.transform = parse(context, transform$1, declaration.transform);
            this.transformOrigin = parse(context, transformOrigin, declaration.transformOrigin);
            this.visibility = parse(context, visibility, declaration.visibility);
            this.webkitTextStrokeColor = parse(context, webkitTextStrokeColor, declaration.webkitTextStrokeColor);
            this.webkitTextStrokeWidth = parse(context, webkitTextStrokeWidth, declaration.webkitTextStrokeWidth);
            this.wordBreak = parse(context, wordBreak, declaration.wordBreak);
            this.zIndex = parse(context, zIndex, declaration.zIndex);
        }
        CSSParsedDeclaration.prototype.isVisible = function () {
            return this.display > 0 && this.opacity > 0 && this.visibility === 0 /* VISIBLE */;
        };
        CSSParsedDeclaration.prototype.isTransparent = function () {
            return isTransparent(this.backgroundColor);
        };
        CSSParsedDeclaration.prototype.isTransformed = function () {
            return this.transform !== null;
        };
        CSSParsedDeclaration.prototype.isPositioned = function () {
            return this.position !== 0 /* STATIC */;
        };
        CSSParsedDeclaration.prototype.isPositionedWithZIndex = function () {
            return this.isPositioned() && !this.zIndex.auto;
        };
        CSSParsedDeclaration.prototype.isFloating = function () {
            return this.float !== 0 /* NONE */;
        };
        CSSParsedDeclaration.prototype.isInlineLevel = function () {
            return (contains(this.display, 4 /* INLINE */) ||
                contains(this.display, 33554432 /* INLINE_BLOCK */) ||
                contains(this.display, 268435456 /* INLINE_FLEX */) ||
                contains(this.display, 536870912 /* INLINE_GRID */) ||
                contains(this.display, 67108864 /* INLINE_LIST_ITEM */) ||
                contains(this.display, 134217728 /* INLINE_TABLE */));
        };
        return CSSParsedDeclaration;
    }());
    var CSSParsedPseudoDeclaration = /** @class */ (function () {
        function CSSParsedPseudoDeclaration(context, declaration) {
            this.content = parse(context, content, declaration.content);
            this.quotes = parse(context, quotes, declaration.quotes);
        }
        return CSSParsedPseudoDeclaration;
    }());
    var CSSParsedCounterDeclaration = /** @class */ (function () {
        function CSSParsedCounterDeclaration(context, declaration) {
            this.counterIncrement = parse(context, counterIncrement, declaration.counterIncrement);
            this.counterReset = parse(context, counterReset, declaration.counterReset);
        }
        return CSSParsedCounterDeclaration;
    }());
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    var parse = function (context, descriptor, style) {
        var tokenizer = new Tokenizer();
        var value = style !== null && typeof style !== 'undefined' ? style.toString() : descriptor.initialValue;
        tokenizer.write(value);
        var parser = new Parser(tokenizer.read());
        switch (descriptor.type) {
            case 2 /* IDENT_VALUE */:
                var token = parser.parseComponentValue();
                return descriptor.parse(context, isIdentToken(token) ? token.value : descriptor.initialValue);
            case 0 /* VALUE */:
                return descriptor.parse(context, parser.parseComponentValue());
            case 1 /* LIST */:
                return descriptor.parse(context, parser.parseComponentValues());
            case 4 /* TOKEN_VALUE */:
                return parser.parseComponentValue();
            case 3 /* TYPE_VALUE */:
                switch (descriptor.format) {
                    case 'angle':
                        return angle.parse(context, parser.parseComponentValue());
                    case 'color':
                        return color$1.parse(context, parser.parseComponentValue());
                    case 'image':
                        return image.parse(context, parser.parseComponentValue());
                    case 'length':
                        var length_1 = parser.parseComponentValue();
                        return isLength(length_1) ? length_1 : ZERO_LENGTH;
                    case 'length-percentage':
                        var value_1 = parser.parseComponentValue();
                        return isLengthPercentage(value_1) ? value_1 : ZERO_LENGTH;
                    case 'time':
                        return time.parse(context, parser.parseComponentValue());
                }
                break;
        }
    };

    var elementDebuggerAttribute = 'data-html2canvas-debug';
    var getElementDebugType = function (element) {
        var attribute = element.getAttribute(elementDebuggerAttribute);
        switch (attribute) {
            case 'all':
                return 1 /* ALL */;
            case 'clone':
                return 2 /* CLONE */;
            case 'parse':
                return 3 /* PARSE */;
            case 'render':
                return 4 /* RENDER */;
            default:
                return 0 /* NONE */;
        }
    };
    var isDebugging = function (element, type) {
        var elementType = getElementDebugType(element);
        return elementType === 1 /* ALL */ || type === elementType;
    };

    var ElementContainer = /** @class */ (function () {
        function ElementContainer(context, element) {
            this.context = context;
            this.textNodes = [];
            this.elements = [];
            this.flags = 0;
            if (isDebugging(element, 3 /* PARSE */)) {
                debugger;
            }
            this.styles = new CSSParsedDeclaration(context, window.getComputedStyle(element, null));
            if (isHTMLElementNode(element)) {
                if (this.styles.animationDuration.some(function (duration) { return duration > 0; })) {
                    element.style.animationDuration = '0s';
                }
                if (this.styles.transform !== null) {
                    // getBoundingClientRect takes transforms into account
                    element.style.transform = 'none';
                }
            }
            this.bounds = parseBounds(this.context, element);
            if (isDebugging(element, 4 /* RENDER */)) {
                this.flags |= 16 /* DEBUG_RENDER */;
            }
        }
        return ElementContainer;
    }());

    /*
     * text-segmentation 1.0.3 <https://github.com/niklasvh/text-segmentation>
     * Copyright (c) 2022 Niklas von Hertzen <https://hertzen.com>
     * Released under MIT License
     */
    var base64 = ' ';

    /*
     * utrie 1.0.2 <https://github.com/niklasvh/utrie>
     * Copyright (c) 2022 Niklas von Hertzen <https://hertzen.com>
     * Released under MIT License
     */
    var chars$1 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    // Use a lookup table to find the index.
    var lookup$1 = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
    for (var i$1 = 0; i$1 < chars$1.length; i$1++) {
        lookup$1[chars$1.charCodeAt(i$1)] = i$1;
    }
    var decode = function (base64) {
        var bufferLength = base64.length * 0.75, len = base64.length, i, p = 0, encoded1, encoded2, encoded3, encoded4;
        if (base64[base64.length - 1] === '=') {
            bufferLength--;
            if (base64[base64.length - 2] === '=') {
                bufferLength--;
            }
        }
        var buffer = typeof ArrayBuffer !== 'undefined' &&
            typeof Uint8Array !== 'undefined' &&
            typeof Uint8Array.prototype.slice !== 'undefined'
            ? new ArrayBuffer(bufferLength)
            : new Array(bufferLength);
        var bytes = Array.isArray(buffer) ? buffer : new Uint8Array(buffer);
        for (i = 0; i < len; i += 4) {
            encoded1 = lookup$1[base64.charCodeAt(i)];
            encoded2 = lookup$1[base64.charCodeAt(i + 1)];
            encoded3 = lookup$1[base64.charCodeAt(i + 2)];
            encoded4 = lookup$1[base64.charCodeAt(i + 3)];
            bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
            bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
            bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
        }
        return buffer;
    };
    var polyUint16Array = function (buffer) {
        var length = buffer.length;
        var bytes = [];
        for (var i = 0; i < length; i += 2) {
            bytes.push((buffer[i + 1] << 8) | buffer[i]);
        }
        return bytes;
    };
    var polyUint32Array = function (buffer) {
        var length = buffer.length;
        var bytes = [];
        for (var i = 0; i < length; i += 4) {
            bytes.push((buffer[i + 3] << 24) | (buffer[i + 2] << 16) | (buffer[i + 1] << 8) | buffer[i]);
        }
        return bytes;
    };

    /** Shift size for getting the index-2 table offset. */
    var UTRIE2_SHIFT_2 = 5;
    /** Shift size for getting the index-1 table offset. */
    var UTRIE2_SHIFT_1 = 6 + 5;
    /**
     * Shift size for shifting left the index array values.
     * Increases possible data size with 16-bit index values at the cost
     * of compactability.
     * This requires data blocks to be aligned by UTRIE2_DATA_GRANULARITY.
     */
    var UTRIE2_INDEX_SHIFT = 2;
    /**
     * Difference between the two shift sizes,
     * for getting an index-1 offset from an index-2 offset. 6=11-5
     */
    var UTRIE2_SHIFT_1_2 = UTRIE2_SHIFT_1 - UTRIE2_SHIFT_2;
    /**
     * The part of the index-2 table for U+D800..U+DBFF stores values for
     * lead surrogate code _units_ not code _points_.
     * Values for lead surrogate code _points_ are indexed with this portion of the table.
     * Length=32=0x20=0x400>>UTRIE2_SHIFT_2. (There are 1024=0x400 lead surrogates.)
     */
    var UTRIE2_LSCP_INDEX_2_OFFSET = 0x10000 >> UTRIE2_SHIFT_2;
    /** Number of entries in a data block. 32=0x20 */
    var UTRIE2_DATA_BLOCK_LENGTH = 1 << UTRIE2_SHIFT_2;
    /** Mask for getting the lower bits for the in-data-block offset. */
    var UTRIE2_DATA_MASK = UTRIE2_DATA_BLOCK_LENGTH - 1;
    var UTRIE2_LSCP_INDEX_2_LENGTH = 0x400 >> UTRIE2_SHIFT_2;
    /** Count the lengths of both BMP pieces. 2080=0x820 */
    var UTRIE2_INDEX_2_BMP_LENGTH = UTRIE2_LSCP_INDEX_2_OFFSET + UTRIE2_LSCP_INDEX_2_LENGTH;
    /**
     * The 2-byte UTF-8 version of the index-2 table follows at offset 2080=0x820.
     * Length 32=0x20 for lead bytes C0..DF, regardless of UTRIE2_SHIFT_2.
     */
    var UTRIE2_UTF8_2B_INDEX_2_OFFSET = UTRIE2_INDEX_2_BMP_LENGTH;
    var UTRIE2_UTF8_2B_INDEX_2_LENGTH = 0x800 >> 6; /* U+0800 is the first code point after 2-byte UTF-8 */
    /**
     * The index-1 table, only used for supplementary code points, at offset 2112=0x840.
     * Variable length, for code points up to highStart, where the last single-value range starts.
     * Maximum length 512=0x200=0x100000>>UTRIE2_SHIFT_1.
     * (For 0x100000 supplementary code points U+10000..U+10ffff.)
     *
     * The part of the index-2 table for supplementary code points starts
     * after this index-1 table.
     *
     * Both the index-1 table and the following part of the index-2 table
     * are omitted completely if there is only BMP data.
     */
    var UTRIE2_INDEX_1_OFFSET = UTRIE2_UTF8_2B_INDEX_2_OFFSET + UTRIE2_UTF8_2B_INDEX_2_LENGTH;
    /**
     * Number of index-1 entries for the BMP. 32=0x20
     * This part of the index-1 table is omitted from the serialized form.
     */
    var UTRIE2_OMITTED_BMP_INDEX_1_LENGTH = 0x10000 >> UTRIE2_SHIFT_1;
    /** Number of entries in an index-2 block. 64=0x40 */
    var UTRIE2_INDEX_2_BLOCK_LENGTH = 1 << UTRIE2_SHIFT_1_2;
    /** Mask for getting the lower bits for the in-index-2-block offset. */
    var UTRIE2_INDEX_2_MASK = UTRIE2_INDEX_2_BLOCK_LENGTH - 1;
    var slice16 = function (view, start, end) {
        if (view.slice) {
            return view.slice(start, end);
        }
        return new Uint16Array(Array.prototype.slice.call(view, start, end));
    };
    var slice32 = function (view, start, end) {
        if (view.slice) {
            return view.slice(start, end);
        }
        return new Uint32Array(Array.prototype.slice.call(view, start, end));
    };
    var createTrieFromBase64 = function (base64, _byteLength) {
        var buffer = decode(base64);
        var view32 = Array.isArray(buffer) ? polyUint32Array(buffer) : new Uint32Array(buffer);
        var view16 = Array.isArray(buffer) ? polyUint16Array(buffer) : new Uint16Array(buffer);
        var headerLength = 24;
        var index = slice16(view16, headerLength / 2, view32[4] / 2);
        var data = view32[5] === 2
            ? slice16(view16, (headerLength + view32[4]) / 2)
            : slice32(view32, Math.ceil((headerLength + view32[4]) / 4));
        return new Trie(view32[0], view32[1], view32[2], view32[3], index, data);
    };
    var Trie = /** @class */ (function () {
        function Trie(initialValue, errorValue, highStart, highValueIndex, index, data) {
            this.initialValue = initialValue;
            this.errorValue = errorValue;
            this.highStart = highStart;
            this.highValueIndex = highValueIndex;
            this.index = index;
            this.data = data;
        }
        /**
         * Get the value for a code point as stored in the Trie.
         *
         * @param codePoint the code point
         * @return the value
         */
        Trie.prototype.get = function (codePoint) {
            var ix;
            if (codePoint >= 0) {
                if (codePoint < 0x0d800 || (codePoint > 0x0dbff && codePoint <= 0x0ffff)) {
                    // Ordinary BMP code point, excluding leading surrogates.
                    // BMP uses a single level lookup.  BMP index starts at offset 0 in the Trie2 index.
                    // 16 bit data is stored in the index array itself.
                    ix = this.index[codePoint >> UTRIE2_SHIFT_2];
                    ix = (ix << UTRIE2_INDEX_SHIFT) + (codePoint & UTRIE2_DATA_MASK);
                    return this.data[ix];
                }
                if (codePoint <= 0xffff) {
                    // Lead Surrogate Code Point.  A Separate index section is stored for
                    // lead surrogate code units and code points.
                    //   The main index has the code unit data.
                    //   For this function, we need the code point data.
                    // Note: this expression could be refactored for slightly improved efficiency, but
                    //       surrogate code points will be so rare in practice that it's not worth it.
                    ix = this.index[UTRIE2_LSCP_INDEX_2_OFFSET + ((codePoint - 0xd800) >> UTRIE2_SHIFT_2)];
                    ix = (ix << UTRIE2_INDEX_SHIFT) + (codePoint & UTRIE2_DATA_MASK);
                    return this.data[ix];
                }
                if (codePoint < this.highStart) {
                    // Supplemental code point, use two-level lookup.
                    ix = UTRIE2_INDEX_1_OFFSET - UTRIE2_OMITTED_BMP_INDEX_1_LENGTH + (codePoint >> UTRIE2_SHIFT_1);
                    ix = this.index[ix];
                    ix += (codePoint >> UTRIE2_SHIFT_2) & UTRIE2_INDEX_2_MASK;
                    ix = this.index[ix];
                    ix = (ix << UTRIE2_INDEX_SHIFT) + (codePoint & UTRIE2_DATA_MASK);
                    return this.data[ix];
                }
                if (codePoint <= 0x10ffff) {
                    return this.data[this.highValueIndex];
                }
            }
            // Fall through.  The code point is outside of the legal range of 0..0x10ffff.
            return this.errorValue;
        };
        return Trie;
    }());

    /*
     * base64-arraybuffer 1.0.2 <https://github.com/niklasvh/base64-arraybuffer>
     * Copyright (c) 2022 Niklas von Hertzen <https://hertzen.com>
     * Released under MIT License
     */
    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    // Use a lookup table to find the index.
    var lookup = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
    for (var i = 0; i < chars.length; i++) {
        lookup[chars.charCodeAt(i)] = i;
    }

    var Prepend = 1;
    var CR = 2;
    var LF = 3;
    var Control = 4;
    var Extend = 5;
    var SpacingMark = 7;
    var L = 8;
    var V = 9;
    var T = 10;
    var LV = 11;
    var LVT = 12;
    var ZWJ = 13;
    var Extended_Pictographic = 14;
    var RI = 15;
    var toCodePoints = function (str) {
        var codePoints = [];
        var i = 0;
        var length = str.length;
        while (i < length) {
            var value = str.charCodeAt(i++);
            if (value >= 0xd800 && value <= 0xdbff && i < length) {
                var extra = str.charCodeAt(i++);
                if ((extra & 0xfc00) === 0xdc00) {
                    codePoints.push(((value & 0x3ff) << 10) + (extra & 0x3ff) + 0x10000);
                }
                else {
                    codePoints.push(value);
                    i--;
                }
            }
            else {
                codePoints.push(value);
            }
        }
        return codePoints;
    };
    var fromCodePoint = function () {
        var codePoints = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            codePoints[_i] = arguments[_i];
        }
        if (String.fromCodePoint) {
            return String.fromCodePoint.apply(String, codePoints);
        }
        var length = codePoints.length;
        if (!length) {
            return '';
        }
        var codeUnits = [];
        var index = -1;
        var result = '';
        while (++index < length) {
            var codePoint = codePoints[index];
            if (codePoint <= 0xffff) {
                codeUnits.push(codePoint);
            }
            else {
                codePoint -= 0x10000;
                codeUnits.push((codePoint >> 10) + 0xd800, (codePoint % 0x400) + 0xdc00);
            }
            if (index + 1 === length || codeUnits.length > 0x4000) {
                result += String.fromCharCode.apply(String, codeUnits);
                codeUnits.length = 0;
            }
        }
        return result;
    };
    var UnicodeTrie = createTrieFromBase64(base64);
    var BREAK_NOT_ALLOWED = '×';
    var BREAK_ALLOWED = '÷';
    var codePointToClass = function (codePoint) { return UnicodeTrie.get(codePoint); };
    var _graphemeBreakAtIndex = function (_codePoints, classTypes, index) {
        var prevIndex = index - 2;
        var prev = classTypes[prevIndex];
        var current = classTypes[index - 1];
        var next = classTypes[index];
        // GB3 Do not break between a CR and LF
        if (current === CR && next === LF) {
            return BREAK_NOT_ALLOWED;
        }
        // GB4 Otherwise, break before and after controls.
        if (current === CR || current === LF || current === Control) {
            return BREAK_ALLOWED;
        }
        // GB5
        if (next === CR || next === LF || next === Control) {
            return BREAK_ALLOWED;
        }
        // Do not break Hangul syllable sequences.
        // GB6
        if (current === L && [L, V, LV, LVT].indexOf(next) !== -1) {
            return BREAK_NOT_ALLOWED;
        }
        // GB7
        if ((current === LV || current === V) && (next === V || next === T)) {
            return BREAK_NOT_ALLOWED;
        }
        // GB8
        if ((current === LVT || current === T) && next === T) {
            return BREAK_NOT_ALLOWED;
        }
        // GB9 Do not break before extending characters or ZWJ.
        if (next === ZWJ || next === Extend) {
            return BREAK_NOT_ALLOWED;
        }
        // Do not break before SpacingMarks, or after Prepend characters.
        // GB9a
        if (next === SpacingMark) {
            return BREAK_NOT_ALLOWED;
        }
        // GB9a
        if (current === Prepend) {
            return BREAK_NOT_ALLOWED;
        }
        // GB11 Do not break within emoji modifier sequences or emoji zwj sequences.
        if (current === ZWJ && next === Extended_Pictographic) {
            while (prev === Extend) {
                prev = classTypes[--prevIndex];
            }
            if (prev === Extended_Pictographic) {
                return BREAK_NOT_ALLOWED;
            }
        }
        // GB12 Do not break within emoji flag sequences.
        // That is, do not break between regional indicator (RI) symbols
        // if there is an odd number of RI characters before the break point.
        if (current === RI && next === RI) {
            var countRI = 0;
            while (prev === RI) {
                countRI++;
                prev = classTypes[--prevIndex];
            }
            if (countRI % 2 === 0) {
                return BREAK_NOT_ALLOWED;
            }
        }
        return BREAK_ALLOWED;
    };
    var GraphemeBreaker = function (str) {
        var codePoints = toCodePoints(str);
        var length = codePoints.length;
        var index = 0;
        var lastEnd = 0;
        var classTypes = codePoints.map(codePointToClass);
        return {
            next: function () {
                if (index >= length) {
                    return { done: true, value: null };
                }
                var graphemeBreak = BREAK_NOT_ALLOWED;
                while (index < length &&
                    (graphemeBreak = _graphemeBreakAtIndex(codePoints, classTypes, ++index)) === BREAK_NOT_ALLOWED) { }
                if (graphemeBreak !== BREAK_NOT_ALLOWED || index === length) {
                    var value = fromCodePoint.apply(null, codePoints.slice(lastEnd, index));
                    lastEnd = index;
                    return { value: value, done: false };
                }
                return { done: true, value: null };
            },
        };
    };
    var splitGraphemes = function (str) {
        var breaker = GraphemeBreaker(str);
        var graphemes = [];
        var bk;
        while (!(bk = breaker.next()).done) {
            if (bk.value) {
                graphemes.push(bk.value.slice());
            }
        }
        return graphemes;
    };

    var testRangeBounds = function (document) {
        var TEST_HEIGHT = 123;
        if (document.createRange) {
            var range = document.createRange();
            if (range.getBoundingClientRect) {
                var testElement = document.createElement('boundtest');
                testElement.style.height = TEST_HEIGHT + "px";
                testElement.style.display = 'block';
                document.body.appendChild(testElement);
                range.selectNode(testElement);
                var rangeBounds = range.getBoundingClientRect();
                var rangeHeight = Math.round(rangeBounds.height);
                document.body.removeChild(testElement);
                if (rangeHeight === TEST_HEIGHT) {
                    return true;
                }
            }
        }
        return false;
    };
    var testIOSLineBreak = function (document) {
        var testElement = document.createElement('boundtest');
        testElement.style.width = '50px';
        testElement.style.display = 'block';
        testElement.style.fontSize = '12px';
        testElement.style.letterSpacing = '0px';
        testElement.style.wordSpacing = '0px';
        document.body.appendChild(testElement);
        var range = document.createRange();
        testElement.innerHTML = typeof ''.repeat === 'function' ? '&#128104;'.repeat(10) : '';
        var node = testElement.firstChild;
        var textList = toCodePoints$1(node.data).map(function (i) { return fromCodePoint$1(i); });
        var offset = 0;
        var prev = {};
        // ios 13 does not handle range getBoundingClientRect line changes correctly #2177
        var supports = textList.every(function (text, i) {
            range.setStart(node, offset);
            range.setEnd(node, offset + text.length);
            var rect = range.getBoundingClientRect();
            offset += text.length;
            var boundAhead = rect.x > prev.x || rect.y > prev.y;
            prev = rect;
            if (i === 0) {
                return true;
            }
            return boundAhead;
        });
        document.body.removeChild(testElement);
        return supports;
    };
    var testCORS = function () { return typeof new Image().crossOrigin !== 'undefined'; };
    var testResponseType = function () { return typeof new XMLHttpRequest().responseType === 'string'; };
    var testSVG = function (document) {
        var img = new Image();
        var canvas = document.createElement('canvas');
        var ctx = canvas.getContext('2d');
        if (!ctx) {
            return false;
        }
        img.src = "data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg'></svg>";
        try {
            ctx.drawImage(img, 0, 0);
            canvas.toDataURL();
        }
        catch (e) {
            return false;
        }
        return true;
    };
    var isGreenPixel = function (data) {
        return data[0] === 0 && data[1] === 255 && data[2] === 0 && data[3] === 255;
    };
    var testForeignObject = function (document) {
        var canvas = document.createElement('canvas');
        var size = 100;
        canvas.width = size;
        canvas.height = size;
        var ctx = canvas.getContext('2d');
        if (!ctx) {
            return Promise.reject(false);
        }
        ctx.fillStyle = 'rgb(0, 255, 0)';
        ctx.fillRect(0, 0, size, size);
        var img = new Image();
        var greenImageSrc = canvas.toDataURL();
        img.src = greenImageSrc;
        var svg = createForeignObjectSVG(size, size, 0, 0, img);
        ctx.fillStyle = 'red';
        ctx.fillRect(0, 0, size, size);
        return loadSerializedSVG$1(svg)
            .then(function (img) {
            ctx.drawImage(img, 0, 0);
            var data = ctx.getImageData(0, 0, size, size).data;
            ctx.fillStyle = 'red';
            ctx.fillRect(0, 0, size, size);
            var node = document.createElement('div');
            node.style.backgroundImage = "url(" + greenImageSrc + ")";
            node.style.height = size + "px";
            // Firefox 55 does not render inline <img /> tags
            return isGreenPixel(data)
                ? loadSerializedSVG$1(createForeignObjectSVG(size, size, 0, 0, node))
                : Promise.reject(false);
        })
            .then(function (img) {
            ctx.drawImage(img, 0, 0);
            // Edge does not render background-images
            return isGreenPixel(ctx.getImageData(0, 0, size, size).data);
        })
            .catch(function () { return false; });
    };
    var createForeignObjectSVG = function (width, height, x, y, node) {
        var xmlns = 'http://www.w3.org/2000/svg';
        var svg = document.createElementNS(xmlns, 'svg');
        var foreignObject = document.createElementNS(xmlns, 'foreignObject');
        svg.setAttributeNS(null, 'width', width.toString());
        svg.setAttributeNS(null, 'height', height.toString());
        foreignObject.setAttributeNS(null, 'width', '100%');
        foreignObject.setAttributeNS(null, 'height', '100%');
        foreignObject.setAttributeNS(null, 'x', x.toString());
        foreignObject.setAttributeNS(null, 'y', y.toString());
        foreignObject.setAttributeNS(null, 'externalResourcesRequired', 'true');
        svg.appendChild(foreignObject);
        foreignObject.appendChild(node);
        return svg;
    };
    var loadSerializedSVG$1 = function (svg) {
        return new Promise(function (resolve, reject) {
            var img = new Image();
            img.onload = function () { return resolve(img); };
            img.onerror = reject;
            img.src = "data:image/svg+xml;charset=utf-8," + encodeURIComponent(new XMLSerializer().serializeToString(svg));
        });
    };
    var FEATURES = {
        get SUPPORT_RANGE_BOUNDS() {
            var value = testRangeBounds(document);
            Object.defineProperty(FEATURES, 'SUPPORT_RANGE_BOUNDS', { value: value });
            return value;
        },
        get SUPPORT_WORD_BREAKING() {
            var value = FEATURES.SUPPORT_RANGE_BOUNDS && testIOSLineBreak(document);
            Object.defineProperty(FEATURES, 'SUPPORT_WORD_BREAKING', { value: value });
            return value;
        },
        get SUPPORT_SVG_DRAWING() {
            var value = testSVG(document);
            Object.defineProperty(FEATURES, 'SUPPORT_SVG_DRAWING', { value: value });
            return value;
        },
        get SUPPORT_FOREIGNOBJECT_DRAWING() {
            var value = typeof Array.from === 'function' && typeof window.fetch === 'function'
                ? testForeignObject(document)
                : Promise.resolve(false);
            Object.defineProperty(FEATURES, 'SUPPORT_FOREIGNOBJECT_DRAWING', { value: value });
            return value;
        },
        get SUPPORT_CORS_IMAGES() {
            var value = testCORS();
            Object.defineProperty(FEATURES, 'SUPPORT_CORS_IMAGES', { value: value });
            return value;
        },
        get SUPPORT_RESPONSE_TYPE() {
            var value = testResponseType();
            Object.defineProperty(FEATURES, 'SUPPORT_RESPONSE_TYPE', { value: value });
            return value;
        },
        get SUPPORT_CORS_XHR() {
            var value = 'withCredentials' in new XMLHttpRequest();
            Object.defineProperty(FEATURES, 'SUPPORT_CORS_XHR', { value: value });
            return value;
        },
        get SUPPORT_NATIVE_TEXT_SEGMENTATION() {
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            var value = !!(typeof Intl !== 'undefined' && Intl.Segmenter);
            Object.defineProperty(FEATURES, 'SUPPORT_NATIVE_TEXT_SEGMENTATION', { value: value });
            return value;
        }
    };

    var TextBounds = /** @class */ (function () {
        function TextBounds(text, bounds) {
            this.text = text;
            this.bounds = bounds;
        }
        return TextBounds;
    }());
    var parseTextBounds = function (context, value, styles, node) {
        var textList = breakText(value, styles);
        var textBounds = [];
        var offset = 0;
        textList.forEach(function (text) {
            if (styles.textDecorationLine.length || text.trim().length > 0) {
                if (FEATURES.SUPPORT_RANGE_BOUNDS) {
                    var clientRects = createRange(node, offset, text.length).getClientRects();
                    if (clientRects.length > 1) {
                        var subSegments = segmentGraphemes(text);
                        var subOffset_1 = 0;
                        subSegments.forEach(function (subSegment) {
                            textBounds.push(new TextBounds(subSegment, Bounds.fromDOMRectList(context, createRange(node, subOffset_1 + offset, subSegment.length).getClientRects())));
                            subOffset_1 += subSegment.length;
                        });
                    }
                    else {
                        textBounds.push(new TextBounds(text, Bounds.fromDOMRectList(context, clientRects)));
                    }
                }
                else {
                    var replacementNode = node.splitText(text.length);
                    textBounds.push(new TextBounds(text, getWrapperBounds(context, node)));
                    node = replacementNode;
                }
            }
            else if (!FEATURES.SUPPORT_RANGE_BOUNDS) {
                node = node.splitText(text.length);
            }
            offset += text.length;
        });
        return textBounds;
    };
    var getWrapperBounds = function (context, node) {
        var ownerDocument = node.ownerDocument;
        if (ownerDocument) {
            var wrapper = ownerDocument.createElement('html2canvaswrapper');
            wrapper.appendChild(node.cloneNode(true));
            var parentNode = node.parentNode;
            if (parentNode) {
                parentNode.replaceChild(wrapper, node);
                var bounds = parseBounds(context, wrapper);
                if (wrapper.firstChild) {
                    parentNode.replaceChild(wrapper.firstChild, wrapper);
                }
                return bounds;
            }
        }
        return Bounds.EMPTY;
    };
    var createRange = function (node, offset, length) {
        var ownerDocument = node.ownerDocument;
        if (!ownerDocument) {
            throw new Error('Node has no owner document');
        }
        var range = ownerDocument.createRange();
        range.setStart(node, offset);
        range.setEnd(node, offset + length);
        return range;
    };
    var segmentGraphemes = function (value) {
        if (FEATURES.SUPPORT_NATIVE_TEXT_SEGMENTATION) {
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            var segmenter = new Intl.Segmenter(void 0, { granularity: 'grapheme' });
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            return Array.from(segmenter.segment(value)).map(function (segment) { return segment.segment; });
        }
        return splitGraphemes(value);
    };
    var segmentWords = function (value, styles) {
        if (FEATURES.SUPPORT_NATIVE_TEXT_SEGMENTATION) {
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            var segmenter = new Intl.Segmenter(void 0, {
                granularity: 'word'
            });
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            return Array.from(segmenter.segment(value)).map(function (segment) { return segment.segment; });
        }
        return breakWords(value, styles);
    };
    var breakText = function (value, styles) {
        return styles.letterSpacing !== 0 ? segmentGraphemes(value) : segmentWords(value, styles);
    };
    // https://drafts.csswg.org/css-text/#word-separator
    var wordSeparators = [0x0020, 0x00a0, 0x1361, 0x10100, 0x10101, 0x1039, 0x1091];
    var breakWords = function (str, styles) {
        var breaker = LineBreaker(str, {
            lineBreak: styles.lineBreak,
            wordBreak: styles.overflowWrap === "break-word" /* BREAK_WORD */ ? 'break-word' : styles.wordBreak
        });
        var words = [];
        var bk;
        var _loop_1 = function () {
            if (bk.value) {
                var value = bk.value.slice();
                var codePoints = toCodePoints$1(value);
                var word_1 = '';
                codePoints.forEach(function (codePoint) {
                    if (wordSeparators.indexOf(codePoint) === -1) {
                        word_1 += fromCodePoint$1(codePoint);
                    }
                    else {
                        if (word_1.length) {
                            words.push(word_1);
                        }
                        words.push(fromCodePoint$1(codePoint));
                        word_1 = '';
                    }
                });
                if (word_1.length) {
                    words.push(word_1);
                }
            }
        };
        while (!(bk = breaker.next()).done) {
            _loop_1();
        }
        return words;
    };

    var TextContainer = /** @class */ (function () {
        function TextContainer(context, node, styles) {
            this.text = transform(node.data, styles.textTransform);
            this.textBounds = parseTextBounds(context, this.text, styles, node);
        }
        return TextContainer;
    }());
    var transform = function (text, transform) {
        switch (transform) {
            case 1 /* LOWERCASE */:
                return text.toLowerCase();
            case 3 /* CAPITALIZE */:
                return text.replace(CAPITALIZE, capitalize);
            case 2 /* UPPERCASE */:
                return text.toUpperCase();
            default:
                return text;
        }
    };
    var CAPITALIZE = /(^|\s|:|-|\(|\))([a-z])/g;
    var capitalize = function (m, p1, p2) {
        if (m.length > 0) {
            return p1 + p2.toUpperCase();
        }
        return m;
    };

    var ImageElementContainer = /** @class */ (function (_super) {
        __extends(ImageElementContainer, _super);
        function ImageElementContainer(context, img) {
            var _this = _super.call(this, context, img) || this;
            _this.src = img.currentSrc || img.src;
            _this.intrinsicWidth = img.naturalWidth;
            _this.intrinsicHeight = img.naturalHeight;
            _this.context.cache.addImage(_this.src);
            return _this;
        }
        return ImageElementContainer;
    }(ElementContainer));

    var CanvasElementContainer = /** @class */ (function (_super) {
        __extends(CanvasElementContainer, _super);
        function CanvasElementContainer(context, canvas) {
            var _this = _super.call(this, context, canvas) || this;
            _this.canvas = canvas;
            _this.intrinsicWidth = canvas.width;
            _this.intrinsicHeight = canvas.height;
            return _this;
        }
        return CanvasElementContainer;
    }(ElementContainer));

    var SVGElementContainer = /** @class */ (function (_super) {
        __extends(SVGElementContainer, _super);
        function SVGElementContainer(context, img) {
            var _this = _super.call(this, context, img) || this;
            var s = new XMLSerializer();
            var bounds = parseBounds(context, img);
            img.setAttribute('width', bounds.width + "px");
            img.setAttribute('height', bounds.height + "px");
            _this.svg = "data:image/svg+xml," + encodeURIComponent(s.serializeToString(img));
            _this.intrinsicWidth = img.width.baseVal.value;
            _this.intrinsicHeight = img.height.baseVal.value;
            _this.context.cache.addImage(_this.svg);
            return _this;
        }
        return SVGElementContainer;
    }(ElementContainer));

    var LIElementContainer = /** @class */ (function (_super) {
        __extends(LIElementContainer, _super);
        function LIElementContainer(context, element) {
            var _this = _super.call(this, context, element) || this;
            _this.value = element.value;
            return _this;
        }
        return LIElementContainer;
    }(ElementContainer));

    var OLElementContainer = /** @class */ (function (_super) {
        __extends(OLElementContainer, _super);
        function OLElementContainer(context, element) {
            var _this = _super.call(this, context, element) || this;
            _this.start = element.start;
            _this.reversed = typeof element.reversed === 'boolean' && element.reversed === true;
            return _this;
        }
        return OLElementContainer;
    }(ElementContainer));

    var CHECKBOX_BORDER_RADIUS = [
        {
            type: 15 /* DIMENSION_TOKEN */,
            flags: 0,
            unit: 'px',
            number: 3
        }
    ];
    var RADIO_BORDER_RADIUS = [
        {
            type: 16 /* PERCENTAGE_TOKEN */,
            flags: 0,
            number: 50
        }
    ];
    var reformatInputBounds = function (bounds) {
        if (bounds.width > bounds.height) {
            return new Bounds(bounds.left + (bounds.width - bounds.height) / 2, bounds.top, bounds.height, bounds.height);
        }
        else if (bounds.width < bounds.height) {
            return new Bounds(bounds.left, bounds.top + (bounds.height - bounds.width) / 2, bounds.width, bounds.width);
        }
        return bounds;
    };
    var getInputValue = function (node) {
        var value = node.type === PASSWORD ? new Array(node.value.length + 1).join('\u2022') : node.value;
        return value.length === 0 ? node.placeholder || '' : value;
    };
    var CHECKBOX = 'checkbox';
    var RADIO = 'radio';
    var PASSWORD = 'password';
    var INPUT_COLOR = 0x2a2a2aff;
    var InputElementContainer = /** @class */ (function (_super) {
        __extends(InputElementContainer, _super);
        function InputElementContainer(context, input) {
            var _this = _super.call(this, context, input) || this;
            _this.type = input.type.toLowerCase();
            _this.checked = input.checked;
            _this.value = getInputValue(input);
            if (_this.type === CHECKBOX || _this.type === RADIO) {
                _this.styles.backgroundColor = 0xdededeff;
                _this.styles.borderTopColor =
                    _this.styles.borderRightColor =
                        _this.styles.borderBottomColor =
                            _this.styles.borderLeftColor =
                                0xa5a5a5ff;
                _this.styles.borderTopWidth =
                    _this.styles.borderRightWidth =
                        _this.styles.borderBottomWidth =
                            _this.styles.borderLeftWidth =
                                1;
                _this.styles.borderTopStyle =
                    _this.styles.borderRightStyle =
                        _this.styles.borderBottomStyle =
                            _this.styles.borderLeftStyle =
                                1 /* SOLID */;
                _this.styles.backgroundClip = [0 /* BORDER_BOX */];
                _this.styles.backgroundOrigin = [0 /* BORDER_BOX */];
                _this.bounds = reformatInputBounds(_this.bounds);
            }
            switch (_this.type) {
                case CHECKBOX:
                    _this.styles.borderTopRightRadius =
                        _this.styles.borderTopLeftRadius =
                            _this.styles.borderBottomRightRadius =
                                _this.styles.borderBottomLeftRadius =
                                    CHECKBOX_BORDER_RADIUS;
                    break;
                case RADIO:
                    _this.styles.borderTopRightRadius =
                        _this.styles.borderTopLeftRadius =
                            _this.styles.borderBottomRightRadius =
                                _this.styles.borderBottomLeftRadius =
                                    RADIO_BORDER_RADIUS;
                    break;
            }
            return _this;
        }
        return InputElementContainer;
    }(ElementContainer));

    var SelectElementContainer = /** @class */ (function (_super) {
        __extends(SelectElementContainer, _super);
        function SelectElementContainer(context, element) {
            var _this = _super.call(this, context, element) || this;
            var option = element.options[element.selectedIndex || 0];
            _this.value = option ? option.text || '' : '';
            return _this;
        }
        return SelectElementContainer;
    }(ElementContainer));

    var TextareaElementContainer = /** @class */ (function (_super) {
        __extends(TextareaElementContainer, _super);
        function TextareaElementContainer(context, element) {
            var _this = _super.call(this, context, element) || this;
            _this.value = element.value;
            return _this;
        }
        return TextareaElementContainer;
    }(ElementContainer));

    var IFrameElementContainer = /** @class */ (function (_super) {
        __extends(IFrameElementContainer, _super);
        function IFrameElementContainer(context, iframe) {
            var _this = _super.call(this, context, iframe) || this;
            _this.src = iframe.src;
            _this.width = parseInt(iframe.width, 10) || 0;
            _this.height = parseInt(iframe.height, 10) || 0;
            _this.backgroundColor = _this.styles.backgroundColor;
            try {
                if (iframe.contentWindow &&
                    iframe.contentWindow.document &&
                    iframe.contentWindow.document.documentElement) {
                    _this.tree = parseTree(context, iframe.contentWindow.document.documentElement);
                    // http://www.w3.org/TR/css3-background/#special-backgrounds
                    var documentBackgroundColor = iframe.contentWindow.document.documentElement
                        ? parseColor(context, getComputedStyle(iframe.contentWindow.document.documentElement).backgroundColor)
                        : COLORS.TRANSPARENT;
                    var bodyBackgroundColor = iframe.contentWindow.document.body
                        ? parseColor(context, getComputedStyle(iframe.contentWindow.document.body).backgroundColor)
                        : COLORS.TRANSPARENT;
                    _this.backgroundColor = isTransparent(documentBackgroundColor)
                        ? isTransparent(bodyBackgroundColor)
                            ? _this.styles.backgroundColor
                            : bodyBackgroundColor
                        : documentBackgroundColor;
                }
            }
            catch (e) { }
            return _this;
        }
        return IFrameElementContainer;
    }(ElementContainer));

    var LIST_OWNERS = ['OL', 'UL', 'MENU'];
    var parseNodeTree = function (context, node, parent, root) {
        for (var childNode = node.firstChild, nextNode = void 0; childNode; childNode = nextNode) {
            nextNode = childNode.nextSibling;
            if (isTextNode(childNode) && childNode.data.trim().length > 0) {
                parent.textNodes.push(new TextContainer(context, childNode, parent.styles));
            }
            else if (isElementNode(childNode)) {
                if (isSlotElement(childNode) && childNode.assignedNodes) {
                    childNode.assignedNodes().forEach(function (childNode) { return parseNodeTree(context, childNode, parent, root); });
                }
                else {
                    var container = createContainer(context, childNode);
                    if (container.styles.isVisible()) {
                        if (createsRealStackingContext(childNode, container, root)) {
                            container.flags |= 4 /* CREATES_REAL_STACKING_CONTEXT */;
                        }
                        else if (createsStackingContext(container.styles)) {
                            container.flags |= 2 /* CREATES_STACKING_CONTEXT */;
                        }
                        if (LIST_OWNERS.indexOf(childNode.tagName) !== -1) {
                            container.flags |= 8 /* IS_LIST_OWNER */;
                        }
                        parent.elements.push(container);
                        childNode.slot;
                        if (childNode.shadowRoot) {
                            parseNodeTree(context, childNode.shadowRoot, container, root);
                        }
                        else if (!isTextareaElement(childNode) &&
                            !isSVGElement(childNode) &&
                            !isSelectElement(childNode)) {
                            parseNodeTree(context, childNode, container, root);
                        }
                    }
                }
            }
        }
    };
    var createContainer = function (context, element) {
        if (isImageElement(element)) {
            return new ImageElementContainer(context, element);
        }
        if (isCanvasElement(element)) {
            return new CanvasElementContainer(context, element);
        }
        if (isSVGElement(element)) {
            return new SVGElementContainer(context, element);
        }
        if (isLIElement(element)) {
            return new LIElementContainer(context, element);
        }
        if (isOLElement(element)) {
            return new OLElementContainer(context, element);
        }
        if (isInputElement(element)) {
            return new InputElementContainer(context, element);
        }
        if (isSelectElement(element)) {
            return new SelectElementContainer(context, element);
        }
        if (isTextareaElement(element)) {
            return new TextareaElementContainer(context, element);
        }
        if (isIFrameElement(element)) {
            return new IFrameElementContainer(context, element);
        }
        return new ElementContainer(context, element);
    };
    var parseTree = function (context, element) {
        var container = createContainer(context, element);
        container.flags |= 4 /* CREATES_REAL_STACKING_CONTEXT */;
        parseNodeTree(context, element, container, container);
        return container;
    };
    var createsRealStackingContext = function (node, container, root) {
        return (container.styles.isPositionedWithZIndex() ||
            container.styles.opacity < 1 ||
            container.styles.isTransformed() ||
            (isBodyElement(node) && root.styles.isTransparent()));
    };
    var createsStackingContext = function (styles) { return styles.isPositioned() || styles.isFloating(); };
    var isTextNode = function (node) { return node.nodeType === Node.TEXT_NODE; };
    var isElementNode = function (node) { return node.nodeType === Node.ELEMENT_NODE; };
    var isHTMLElementNode = function (node) {
        return isElementNode(node) && typeof node.style !== 'undefined' && !isSVGElementNode(node);
    };
    var isSVGElementNode = function (element) {
        return typeof element.className === 'object';
    };
    var isLIElement = function (node) { return node.tagName === 'LI'; };
    var isOLElement = function (node) { return node.tagName === 'OL'; };
    var isInputElement = function (node) { return node.tagName === 'INPUT'; };
    var isHTMLElement = function (node) { return node.tagName === 'HTML'; };
    var isSVGElement = function (node) { return node.tagName === 'svg'; };
    var isBodyElement = function (node) { return node.tagName === 'BODY'; };
    var isCanvasElement = function (node) { return node.tagName === 'CANVAS'; };
    var isVideoElement = function (node) { return node.tagName === 'VIDEO'; };
    var isImageElement = function (node) { return node.tagName === 'IMG'; };
    var isIFrameElement = function (node) { return node.tagName === 'IFRAME'; };
    var isStyleElement = function (node) { return node.tagName === 'STYLE'; };
    var isScriptElement = function (node) { return node.tagName === 'SCRIPT'; };
    var isTextareaElement = function (node) { return node.tagName === 'TEXTAREA'; };
    var isSelectElement = function (node) { return node.tagName === 'SELECT'; };
    var isSlotElement = function (node) { return node.tagName === 'SLOT'; };
    // https://html.spec.whatwg.org/multipage/custom-elements.html#valid-custom-element-name
    var isCustomElement = function (node) { return node.tagName.indexOf('-') > 0; };

    var CounterState = /** @class */ (function () {
        function CounterState() {
            this.counters = {};
        }
        CounterState.prototype.getCounterValue = function (name) {
            var counter = this.counters[name];
            if (counter && counter.length) {
                return counter[counter.length - 1];
            }
            return 1;
        };
        CounterState.prototype.getCounterValues = function (name) {
            var counter = this.counters[name];
            return counter ? counter : [];
        };
        CounterState.prototype.pop = function (counters) {
            var _this = this;
            counters.forEach(function (counter) { return _this.counters[counter].pop(); });
        };
        CounterState.prototype.parse = function (style) {
            var _this = this;
            var counterIncrement = style.counterIncrement;
            var counterReset = style.counterReset;
            var canReset = true;
            if (counterIncrement !== null) {
                counterIncrement.forEach(function (entry) {
                    var counter = _this.counters[entry.counter];
                    if (counter && entry.increment !== 0) {
                        canReset = false;
                        if (!counter.length) {
                            counter.push(1);
                        }
                        counter[Math.max(0, counter.length - 1)] += entry.increment;
                    }
                });
            }
            var counterNames = [];
            if (canReset) {
                counterReset.forEach(function (entry) {
                    var counter = _this.counters[entry.counter];
                    counterNames.push(entry.counter);
                    if (!counter) {
                        counter = _this.counters[entry.counter] = [];
                    }
                    counter.push(entry.reset);
                });
            }
            return counterNames;
        };
        return CounterState;
    }());
    var ROMAN_UPPER = {
        integers: [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1],
        values: ['M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I']
    };
    var ARMENIAN = {
        integers: [
            9000, 8000, 7000, 6000, 5000, 4000, 3000, 2000, 1000, 900, 800, 700, 600, 500, 400, 300, 200, 100, 90, 80, 70,
            60, 50, 40, 30, 20, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1
        ],
        values: [
            'Ք',
            'Փ',
            'Ւ',
            'Ց',
            'Ր',
            'Տ',
            'Վ',
            'Ս',
            'Ռ',
            'Ջ',
            'Պ',
            'Չ',
            'Ո',
            'Շ',
            'Ն',
            'Յ',
            'Մ',
            'Ճ',
            'Ղ',
            'Ձ',
            'Հ',
            'Կ',
            'Ծ',
            'Խ',
            'Լ',
            'Ի',
            'Ժ',
            'Թ',
            'Ը',
            'Է',
            'Զ',
            'Ե',
            'Դ',
            'Գ',
            'Բ',
            'Ա'
        ]
    };
    var HEBREW = {
        integers: [
            10000, 9000, 8000, 7000, 6000, 5000, 4000, 3000, 2000, 1000, 400, 300, 200, 100, 90, 80, 70, 60, 50, 40, 30, 20,
            19, 18, 17, 16, 15, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1
        ],
        values: [
            'י׳',
            'ט׳',
            'ח׳',
            'ז׳',
            'ו׳',
            'ה׳',
            'ד׳',
            'ג׳',
            'ב׳',
            'א׳',
            'ת',
            'ש',
            'ר',
            'ק',
            'צ',
            'פ',
            'ע',
            'ס',
            'נ',
            'מ',
            'ל',
            'כ',
            'יט',
            'יח',
            'יז',
            'טז',
            'טו',
            'י',
            'ט',
            'ח',
            'ז',
            'ו',
            'ה',
            'ד',
            'ג',
            'ב',
            'א'
        ]
    };
    var GEORGIAN = {
        integers: [
            10000, 9000, 8000, 7000, 6000, 5000, 4000, 3000, 2000, 1000, 900, 800, 700, 600, 500, 400, 300, 200, 100, 90,
            80, 70, 60, 50, 40, 30, 20, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1
        ],
        values: [
            'ჵ',
            'ჰ',
            'ჯ',
            'ჴ',
            'ხ',
            'ჭ',
            'წ',
            'ძ',
            'ც',
            'ჩ',
            'შ',
            'ყ',
            'ღ',
            'ქ',
            'ფ',
            'ჳ',
            'ტ',
            'ს',
            'რ',
            'ჟ',
            'პ',
            'ო',
            'ჲ',
            'ნ',
            'მ',
            'ლ',
            'კ',
            'ი',
            'თ',
            'ჱ',
            'ზ',
            'ვ',
            'ე',
            'დ',
            'გ',
            'ბ',
            'ა'
        ]
    };
    var createAdditiveCounter = function (value, min, max, symbols, fallback, suffix) {
        if (value < min || value > max) {
            return createCounterText(value, fallback, suffix.length > 0);
        }
        return (symbols.integers.reduce(function (string, integer, index) {
            while (value >= integer) {
                value -= integer;
                string += symbols.values[index];
            }
            return string;
        }, '') + suffix);
    };
    var createCounterStyleWithSymbolResolver = function (value, codePointRangeLength, isNumeric, resolver) {
        var string = '';
        do {
            if (!isNumeric) {
                value--;
            }
            string = resolver(value) + string;
            value /= codePointRangeLength;
        } while (value * codePointRangeLength >= codePointRangeLength);
        return string;
    };
    var createCounterStyleFromRange = function (value, codePointRangeStart, codePointRangeEnd, isNumeric, suffix) {
        var codePointRangeLength = codePointRangeEnd - codePointRangeStart + 1;
        return ((value < 0 ? '-' : '') +
            (createCounterStyleWithSymbolResolver(Math.abs(value), codePointRangeLength, isNumeric, function (codePoint) {
                return fromCodePoint$1(Math.floor(codePoint % codePointRangeLength) + codePointRangeStart);
            }) +
                suffix));
    };
    var createCounterStyleFromSymbols = function (value, symbols, suffix) {
        if (suffix === void 0) { suffix = '. '; }
        var codePointRangeLength = symbols.length;
        return (createCounterStyleWithSymbolResolver(Math.abs(value), codePointRangeLength, false, function (codePoint) { return symbols[Math.floor(codePoint % codePointRangeLength)]; }) + suffix);
    };
    var CJK_ZEROS = 1 << 0;
    var CJK_TEN_COEFFICIENTS = 1 << 1;
    var CJK_TEN_HIGH_COEFFICIENTS = 1 << 2;
    var CJK_HUNDRED_COEFFICIENTS = 1 << 3;
    var createCJKCounter = function (value, numbers, multipliers, negativeSign, suffix, flags) {
        if (value < -9999 || value > 9999) {
            return createCounterText(value, 4 /* CJK_DECIMAL */, suffix.length > 0);
        }
        var tmp = Math.abs(value);
        var string = suffix;
        if (tmp === 0) {
            return numbers[0] + string;
        }
        for (var digit = 0; tmp > 0 && digit <= 4; digit++) {
            var coefficient = tmp % 10;
            if (coefficient === 0 && contains(flags, CJK_ZEROS) && string !== '') {
                string = numbers[coefficient] + string;
            }
            else if (coefficient > 1 ||
                (coefficient === 1 && digit === 0) ||
                (coefficient === 1 && digit === 1 && contains(flags, CJK_TEN_COEFFICIENTS)) ||
                (coefficient === 1 && digit === 1 && contains(flags, CJK_TEN_HIGH_COEFFICIENTS) && value > 100) ||
                (coefficient === 1 && digit > 1 && contains(flags, CJK_HUNDRED_COEFFICIENTS))) {
                string = numbers[coefficient] + (digit > 0 ? multipliers[digit - 1] : '') + string;
            }
            else if (coefficient === 1 && digit > 0) {
                string = multipliers[digit - 1] + string;
            }
            tmp = Math.floor(tmp / 10);
        }
        return (value < 0 ? negativeSign : '') + string;
    };
    var CHINESE_INFORMAL_MULTIPLIERS = '十百千萬';
    var CHINESE_FORMAL_MULTIPLIERS = '拾佰仟萬';
    var JAPANESE_NEGATIVE = 'マイナス';
    var KOREAN_NEGATIVE = '마이너스';
    var createCounterText = function (value, type, appendSuffix) {
        var defaultSuffix = appendSuffix ? '. ' : '';
        var cjkSuffix = appendSuffix ? '、' : '';
        var koreanSuffix = appendSuffix ? ', ' : '';
        var spaceSuffix = appendSuffix ? ' ' : '';
        switch (type) {
            case 0 /* DISC */:
                return '•' + spaceSuffix;
            case 1 /* CIRCLE */:
                return '◦' + spaceSuffix;
            case 2 /* SQUARE */:
                return '◾' + spaceSuffix;
            case 5 /* DECIMAL_LEADING_ZERO */:
                var string = createCounterStyleFromRange(value, 48, 57, true, defaultSuffix);
                return string.length < 4 ? "0" + string : string;
            case 4 /* CJK_DECIMAL */:
                return createCounterStyleFromSymbols(value, '〇一二三四五六七八九', cjkSuffix);
            case 6 /* LOWER_ROMAN */:
                return createAdditiveCounter(value, 1, 3999, ROMAN_UPPER, 3 /* DECIMAL */, defaultSuffix).toLowerCase();
            case 7 /* UPPER_ROMAN */:
                return createAdditiveCounter(value, 1, 3999, ROMAN_UPPER, 3 /* DECIMAL */, defaultSuffix);
            case 8 /* LOWER_GREEK */:
                return createCounterStyleFromRange(value, 945, 969, false, defaultSuffix);
            case 9 /* LOWER_ALPHA */:
                return createCounterStyleFromRange(value, 97, 122, false, defaultSuffix);
            case 10 /* UPPER_ALPHA */:
                return createCounterStyleFromRange(value, 65, 90, false, defaultSuffix);
            case 11 /* ARABIC_INDIC */:
                return createCounterStyleFromRange(value, 1632, 1641, true, defaultSuffix);
            case 12 /* ARMENIAN */:
            case 49 /* UPPER_ARMENIAN */:
                return createAdditiveCounter(value, 1, 9999, ARMENIAN, 3 /* DECIMAL */, defaultSuffix);
            case 35 /* LOWER_ARMENIAN */:
                return createAdditiveCounter(value, 1, 9999, ARMENIAN, 3 /* DECIMAL */, defaultSuffix).toLowerCase();
            case 13 /* BENGALI */:
                return createCounterStyleFromRange(value, 2534, 2543, true, defaultSuffix);
            case 14 /* CAMBODIAN */:
            case 30 /* KHMER */:
                return createCounterStyleFromRange(value, 6112, 6121, true, defaultSuffix);
            case 15 /* CJK_EARTHLY_BRANCH */:
                return createCounterStyleFromSymbols(value, '子丑寅卯辰巳午未申酉戌亥', cjkSuffix);
            case 16 /* CJK_HEAVENLY_STEM */:
                return createCounterStyleFromSymbols(value, '甲乙丙丁戊己庚辛壬癸', cjkSuffix);
            case 17 /* CJK_IDEOGRAPHIC */:
            case 48 /* TRAD_CHINESE_INFORMAL */:
                return createCJKCounter(value, '零一二三四五六七八九', CHINESE_INFORMAL_MULTIPLIERS, '負', cjkSuffix, CJK_TEN_COEFFICIENTS | CJK_TEN_HIGH_COEFFICIENTS | CJK_HUNDRED_COEFFICIENTS);
            case 47 /* TRAD_CHINESE_FORMAL */:
                return createCJKCounter(value, '零壹貳參肆伍陸柒捌玖', CHINESE_FORMAL_MULTIPLIERS, '負', cjkSuffix, CJK_ZEROS | CJK_TEN_COEFFICIENTS | CJK_TEN_HIGH_COEFFICIENTS | CJK_HUNDRED_COEFFICIENTS);
            case 42 /* SIMP_CHINESE_INFORMAL */:
                return createCJKCounter(value, '零一二三四五六七八九', CHINESE_INFORMAL_MULTIPLIERS, '负', cjkSuffix, CJK_TEN_COEFFICIENTS | CJK_TEN_HIGH_COEFFICIENTS | CJK_HUNDRED_COEFFICIENTS);
            case 41 /* SIMP_CHINESE_FORMAL */:
                return createCJKCounter(value, '零壹贰叁肆伍陆柒捌玖', CHINESE_FORMAL_MULTIPLIERS, '负', cjkSuffix, CJK_ZEROS | CJK_TEN_COEFFICIENTS | CJK_TEN_HIGH_COEFFICIENTS | CJK_HUNDRED_COEFFICIENTS);
            case 26 /* JAPANESE_INFORMAL */:
                return createCJKCounter(value, '〇一二三四五六七八九', '十百千万', JAPANESE_NEGATIVE, cjkSuffix, 0);
            case 25 /* JAPANESE_FORMAL */:
                return createCJKCounter(value, '零壱弐参四伍六七八九', '拾百千万', JAPANESE_NEGATIVE, cjkSuffix, CJK_ZEROS | CJK_TEN_COEFFICIENTS | CJK_TEN_HIGH_COEFFICIENTS);
            case 31 /* KOREAN_HANGUL_FORMAL */:
                return createCJKCounter(value, '영일이삼사오육칠팔구', '십백천만', KOREAN_NEGATIVE, koreanSuffix, CJK_ZEROS | CJK_TEN_COEFFICIENTS | CJK_TEN_HIGH_COEFFICIENTS);
            case 33 /* KOREAN_HANJA_INFORMAL */:
                return createCJKCounter(value, '零一二三四五六七八九', '十百千萬', KOREAN_NEGATIVE, koreanSuffix, 0);
            case 32 /* KOREAN_HANJA_FORMAL */:
                return createCJKCounter(value, '零壹貳參四五六七八九', '拾百千', KOREAN_NEGATIVE, koreanSuffix, CJK_ZEROS | CJK_TEN_COEFFICIENTS | CJK_TEN_HIGH_COEFFICIENTS);
            case 18 /* DEVANAGARI */:
                return createCounterStyleFromRange(value, 0x966, 0x96f, true, defaultSuffix);
            case 20 /* GEORGIAN */:
                return createAdditiveCounter(value, 1, 19999, GEORGIAN, 3 /* DECIMAL */, defaultSuffix);
            case 21 /* GUJARATI */:
                return createCounterStyleFromRange(value, 0xae6, 0xaef, true, defaultSuffix);
            case 22 /* GURMUKHI */:
                return createCounterStyleFromRange(value, 0xa66, 0xa6f, true, defaultSuffix);
            case 22 /* HEBREW */:
                return createAdditiveCounter(value, 1, 10999, HEBREW, 3 /* DECIMAL */, defaultSuffix);
            case 23 /* HIRAGANA */:
                return createCounterStyleFromSymbols(value, 'あいうえおかきくけこさしすせそたちつてとなにぬねのはひふへほまみむめもやゆよらりるれろわゐゑをん');
            case 24 /* HIRAGANA_IROHA */:
                return createCounterStyleFromSymbols(value, 'いろはにほへとちりぬるをわかよたれそつねならむうゐのおくやまけふこえてあさきゆめみしゑひもせす');
            case 27 /* KANNADA */:
                return createCounterStyleFromRange(value, 0xce6, 0xcef, true, defaultSuffix);
            case 28 /* KATAKANA */:
                return createCounterStyleFromSymbols(value, 'アイウエオカキクケコサシスセソタチツテトナニヌネノハヒフヘホマミムメモヤユヨラリルレロワヰヱヲン', cjkSuffix);
            case 29 /* KATAKANA_IROHA */:
                return createCounterStyleFromSymbols(value, 'イロハニホヘトチリヌルヲワカヨタレソツネナラムウヰノオクヤマケフコエテアサキユメミシヱヒモセス', cjkSuffix);
            case 34 /* LAO */:
                return createCounterStyleFromRange(value, 0xed0, 0xed9, true, defaultSuffix);
            case 37 /* MONGOLIAN */:
                return createCounterStyleFromRange(value, 0x1810, 0x1819, true, defaultSuffix);
            case 38 /* MYANMAR */:
                return createCounterStyleFromRange(value, 0x1040, 0x1049, true, defaultSuffix);
            case 39 /* ORIYA */:
                return createCounterStyleFromRange(value, 0xb66, 0xb6f, true, defaultSuffix);
            case 40 /* PERSIAN */:
                return createCounterStyleFromRange(value, 0x6f0, 0x6f9, true, defaultSuffix);
            case 43 /* TAMIL */:
                return createCounterStyleFromRange(value, 0xbe6, 0xbef, true, defaultSuffix);
            case 44 /* TELUGU */:
                return createCounterStyleFromRange(value, 0xc66, 0xc6f, true, defaultSuffix);
            case 45 /* THAI */:
                return createCounterStyleFromRange(value, 0xe50, 0xe59, true, defaultSuffix);
            case 46 /* TIBETAN */:
                return createCounterStyleFromRange(value, 0xf20, 0xf29, true, defaultSuffix);
            case 3 /* DECIMAL */:
            default:
                return createCounterStyleFromRange(value, 48, 57, true, defaultSuffix);
        }
    };

    var IGNORE_ATTRIBUTE = 'data-html2canvas-ignore';
    var DocumentCloner = /** @class */ (function () {
        function DocumentCloner(context, element, options) {
            this.context = context;
            this.options = options;
            this.scrolledElements = [];
            this.referenceElement = element;
            this.counters = new CounterState();
            this.quoteDepth = 0;
            if (!element.ownerDocument) {
                throw new Error('Cloned element does not have an owner document');
            }
            this.documentElement = this.cloneNode(element.ownerDocument.documentElement, false);
        }
        DocumentCloner.prototype.toIFrame = function (ownerDocument, windowSize) {
            var _this = this;
            var iframe = createIFrameContainer(ownerDocument, windowSize);
            if (!iframe.contentWindow) {
                return Promise.reject("Unable to find iframe window");
            }
            var scrollX = ownerDocument.defaultView.pageXOffset;
            var scrollY = ownerDocument.defaultView.pageYOffset;
            var cloneWindow = iframe.contentWindow;
            var documentClone = cloneWindow.document;
            /* Chrome doesn't detect relative background-images assigned in inline <style> sheets when fetched through getComputedStyle
             if window url is about:blank, we can assign the url to current by writing onto the document
             */
            var iframeLoad = iframeLoader(iframe).then(function () { return __awaiter(_this, void 0, void 0, function () {
                var onclone, referenceElement;
                return __generator(this, function (_a) {
                    switch (_a.label) {
                        case 0:
                            this.scrolledElements.forEach(restoreNodeScroll);
                            if (cloneWindow) {
                                cloneWindow.scrollTo(windowSize.left, windowSize.top);
                                if (/(iPad|iPhone|iPod)/g.test(navigator.userAgent) &&
                                    (cloneWindow.scrollY !== windowSize.top || cloneWindow.scrollX !== windowSize.left)) {
                                    this.context.logger.warn('Unable to restore scroll position for cloned document');
                                    this.context.windowBounds = this.context.windowBounds.add(cloneWindow.scrollX - windowSize.left, cloneWindow.scrollY - windowSize.top, 0, 0);
                                }
                            }
                            onclone = this.options.onclone;
                            referenceElement = this.clonedReferenceElement;
                            if (typeof referenceElement === 'undefined') {
                                return [2 /*return*/, Promise.reject("Error finding the " + this.referenceElement.nodeName + " in the cloned document")];
                            }
                            if (!(documentClone.fonts && documentClone.fonts.ready)) return [3 /*break*/, 2];
                            return [4 /*yield*/, documentClone.fonts.ready];
                        case 1:
                            _a.sent();
                            _a.label = 2;
                        case 2:
                            if (!/(AppleWebKit)/g.test(navigator.userAgent)) return [3 /*break*/, 4];
                            return [4 /*yield*/, imagesReady(documentClone)];
                        case 3:
                            _a.sent();
                            _a.label = 4;
                        case 4:
                            if (typeof onclone === 'function') {
                                return [2 /*return*/, Promise.resolve()
                                        .then(function () { return onclone(documentClone, referenceElement); })
                                        .then(function () { return iframe; })];
                            }
                            return [2 /*return*/, iframe];
                    }
                });
            }); });
            documentClone.open();
            documentClone.write(serializeDoctype(document.doctype) + "<html></html>");
            // Chrome scrolls the parent document for some reason after the write to the cloned window???
            restoreOwnerScroll(this.referenceElement.ownerDocument, scrollX, scrollY);
            documentClone.replaceChild(documentClone.adoptNode(this.documentElement), documentClone.documentElement);
            documentClone.close();
            return iframeLoad;
        };
        DocumentCloner.prototype.createElementClone = function (node) {
            if (isDebugging(node, 2 /* CLONE */)) {
                debugger;
            }
            if (isCanvasElement(node)) {
                return this.createCanvasClone(node);
            }
            if (isVideoElement(node)) {
                return this.createVideoClone(node);
            }
            if (isStyleElement(node)) {
                return this.createStyleClone(node);
            }
            var clone = node.cloneNode(false);
            if (isImageElement(clone)) {
                if (isImageElement(node) && node.currentSrc && node.currentSrc !== node.src) {
                    clone.src = node.currentSrc;
                    clone.srcset = '';
                }
                if (clone.loading === 'lazy') {
                    clone.loading = 'eager';
                }
            }
            if (isCustomElement(clone)) {
                return this.createCustomElementClone(clone);
            }
            return clone;
        };
        DocumentCloner.prototype.createCustomElementClone = function (node) {
            var clone = document.createElement('html2canvascustomelement');
            copyCSSStyles(node.style, clone);
            return clone;
        };
        DocumentCloner.prototype.createStyleClone = function (node) {
            try {
                var sheet = node.sheet;
                if (sheet && sheet.cssRules) {
                    var css = [].slice.call(sheet.cssRules, 0).reduce(function (css, rule) {
                        if (rule && typeof rule.cssText === 'string') {
                            return css + rule.cssText;
                        }
                        return css;
                    }, '');
                    var style = node.cloneNode(false);
                    style.textContent = css;
                    return style;
                }
            }
            catch (e) {
                // accessing node.sheet.cssRules throws a DOMException
                this.context.logger.error('Unable to access cssRules property', e);
                if (e.name !== 'SecurityError') {
                    throw e;
                }
            }
            return node.cloneNode(false);
        };
        DocumentCloner.prototype.createCanvasClone = function (canvas) {
            var _a;
            if (this.options.inlineImages && canvas.ownerDocument) {
                var img = canvas.ownerDocument.createElement('img');
                try {
                    img.src = canvas.toDataURL();
                    return img;
                }
                catch (e) {
                    this.context.logger.info("Unable to inline canvas contents, canvas is tainted", canvas);
                }
            }
            var clonedCanvas = canvas.cloneNode(false);
            try {
                clonedCanvas.width = canvas.width;
                clonedCanvas.height = canvas.height;
                var ctx = canvas.getContext('2d');
                var clonedCtx = clonedCanvas.getContext('2d');
                if (clonedCtx) {
                    if (!this.options.allowTaint && ctx) {
                        clonedCtx.putImageData(ctx.getImageData(0, 0, canvas.width, canvas.height), 0, 0);
                    }
                    else {
                        var gl = (_a = canvas.getContext('webgl2')) !== null && _a !== void 0 ? _a : canvas.getContext('webgl');
                        if (gl) {
                            var attribs = gl.getContextAttributes();
                            if ((attribs === null || attribs === void 0 ? void 0 : attribs.preserveDrawingBuffer) === false) {
                                this.context.logger.warn('Unable to clone WebGL context as it has preserveDrawingBuffer=false', canvas);
                            }
                        }
                        clonedCtx.drawImage(canvas, 0, 0);
                    }
                }
                return clonedCanvas;
            }
            catch (e) {
                this.context.logger.info("Unable to clone canvas as it is tainted", canvas);
            }
            return clonedCanvas;
        };
        DocumentCloner.prototype.createVideoClone = function (video) {
            var canvas = video.ownerDocument.createElement('canvas');
            canvas.width = video.offsetWidth;
            canvas.height = video.offsetHeight;
            var ctx = canvas.getContext('2d');
            try {
                if (ctx) {
                    ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
                    if (!this.options.allowTaint) {
                        ctx.getImageData(0, 0, canvas.width, canvas.height);
                    }
                }
                return canvas;
            }
            catch (e) {
                this.context.logger.info("Unable to clone video as it is tainted", video);
            }
            var blankCanvas = video.ownerDocument.createElement('canvas');
            blankCanvas.width = video.offsetWidth;
            blankCanvas.height = video.offsetHeight;
            return blankCanvas;
        };
        DocumentCloner.prototype.appendChildNode = function (clone, child, copyStyles) {
            if (!isElementNode(child) ||
                (!isScriptElement(child) &&
                    !child.hasAttribute(IGNORE_ATTRIBUTE) &&
                    (typeof this.options.ignoreElements !== 'function' || !this.options.ignoreElements(child)))) {
                if (!this.options.copyStyles || !isElementNode(child) || !isStyleElement(child)) {
                    clone.appendChild(this.cloneNode(child, copyStyles));
                }
            }
        };
        DocumentCloner.prototype.cloneChildNodes = function (node, clone, copyStyles) {
            var _this = this;
            for (var child = node.shadowRoot ? node.shadowRoot.firstChild : node.firstChild; child; child = child.nextSibling) {
                if (isElementNode(child) && isSlotElement(child) && typeof child.assignedNodes === 'function') {
                    var assignedNodes = child.assignedNodes();
                    if (assignedNodes.length) {
                        assignedNodes.forEach(function (assignedNode) { return _this.appendChildNode(clone, assignedNode, copyStyles); });
                    }
                }
                else {
                    this.appendChildNode(clone, child, copyStyles);
                }
            }
        };
        DocumentCloner.prototype.cloneNode = function (node, copyStyles) {
            if (isTextNode(node)) {
                return document.createTextNode(node.data);
            }
            if (!node.ownerDocument) {
                return node.cloneNode(false);
            }
            var window = node.ownerDocument.defaultView;
            if (window && isElementNode(node) && (isHTMLElementNode(node) || isSVGElementNode(node))) {
                var clone = this.createElementClone(node);
                clone.style.transitionProperty = 'none';
                var style = window.getComputedStyle(node);
                var styleBefore = window.getComputedStyle(node, ':before');
                var styleAfter = window.getComputedStyle(node, ':after');
                if (this.referenceElement === node && isHTMLElementNode(clone)) {
                    this.clonedReferenceElement = clone;
                }
                if (isBodyElement(clone)) {
                    createPseudoHideStyles(clone);
                }
                var counters = this.counters.parse(new CSSParsedCounterDeclaration(this.context, style));
                var before = this.resolvePseudoContent(node, clone, styleBefore, PseudoElementType.BEFORE);
                if (isCustomElement(node)) {
                    copyStyles = true;
                }
                if (!isVideoElement(node)) {
                    this.cloneChildNodes(node, clone, copyStyles);
                }
                if (before) {
                    clone.insertBefore(before, clone.firstChild);
                }
                var after = this.resolvePseudoContent(node, clone, styleAfter, PseudoElementType.AFTER);
                if (after) {
                    clone.appendChild(after);
                }
                this.counters.pop(counters);
                if ((style && (this.options.copyStyles || isSVGElementNode(node)) && !isIFrameElement(node)) ||
                    copyStyles) {
                    copyCSSStyles(style, clone);
                }
                if (node.scrollTop !== 0 || node.scrollLeft !== 0) {
                    this.scrolledElements.push([clone, node.scrollLeft, node.scrollTop]);
                }
                if ((isTextareaElement(node) || isSelectElement(node)) &&
                    (isTextareaElement(clone) || isSelectElement(clone))) {
                    clone.value = node.value;
                }
                return clone;
            }
            return node.cloneNode(false);
        };
        DocumentCloner.prototype.resolvePseudoContent = function (node, clone, style, pseudoElt) {
            var _this = this;
            if (!style) {
                return;
            }
            var value = style.content;
            var document = clone.ownerDocument;
            if (!document || !value || value === 'none' || value === '-moz-alt-content' || style.display === 'none') {
                return;
            }
            this.counters.parse(new CSSParsedCounterDeclaration(this.context, style));
            var declaration = new CSSParsedPseudoDeclaration(this.context, style);
            var anonymousReplacedElement = document.createElement('html2canvaspseudoelement');
            copyCSSStyles(style, anonymousReplacedElement);
            declaration.content.forEach(function (token) {
                if (token.type === 0 /* STRING_TOKEN */) {
                    anonymousReplacedElement.appendChild(document.createTextNode(token.value));
                }
                else if (token.type === 22 /* URL_TOKEN */) {
                    var img = document.createElement('img');
                    img.src = token.value;
                    img.style.opacity = '1';
                    anonymousReplacedElement.appendChild(img);
                }
                else if (token.type === 18 /* FUNCTION */) {
                    if (token.name === 'attr') {
                        var attr = token.values.filter(isIdentToken);
                        if (attr.length) {
                            anonymousReplacedElement.appendChild(document.createTextNode(node.getAttribute(attr[0].value) || ''));
                        }
                    }
                    else if (token.name === 'counter') {
                        var _a = token.values.filter(nonFunctionArgSeparator), counter = _a[0], counterStyle = _a[1];
                        if (counter && isIdentToken(counter)) {
                            var counterState = _this.counters.getCounterValue(counter.value);
                            var counterType = counterStyle && isIdentToken(counterStyle)
                                ? listStyleType.parse(_this.context, counterStyle.value)
                                : 3 /* DECIMAL */;
                            anonymousReplacedElement.appendChild(document.createTextNode(createCounterText(counterState, counterType, false)));
                        }
                    }
                    else if (token.name === 'counters') {
                        var _b = token.values.filter(nonFunctionArgSeparator), counter = _b[0], delim = _b[1], counterStyle = _b[2];
                        if (counter && isIdentToken(counter)) {
                            var counterStates = _this.counters.getCounterValues(counter.value);
                            var counterType_1 = counterStyle && isIdentToken(counterStyle)
                                ? listStyleType.parse(_this.context, counterStyle.value)
                                : 3 /* DECIMAL */;
                            var separator = delim && delim.type === 0 /* STRING_TOKEN */ ? delim.value : '';
                            var text = counterStates
                                .map(function (value) { return createCounterText(value, counterType_1, false); })
                                .join(separator);
                            anonymousReplacedElement.appendChild(document.createTextNode(text));
                        }
                    }
                    else ;
                }
                else if (token.type === 20 /* IDENT_TOKEN */) {
                    switch (token.value) {
                        case 'open-quote':
                            anonymousReplacedElement.appendChild(document.createTextNode(getQuote(declaration.quotes, _this.quoteDepth++, true)));
                            break;
                        case 'close-quote':
                            anonymousReplacedElement.appendChild(document.createTextNode(getQuote(declaration.quotes, --_this.quoteDepth, false)));
                            break;
                        default:
                            // safari doesn't parse string tokens correctly because of lack of quotes
                            anonymousReplacedElement.appendChild(document.createTextNode(token.value));
                    }
                }
            });
            anonymousReplacedElement.className = PSEUDO_HIDE_ELEMENT_CLASS_BEFORE + " " + PSEUDO_HIDE_ELEMENT_CLASS_AFTER;
            var newClassName = pseudoElt === PseudoElementType.BEFORE
                ? " " + PSEUDO_HIDE_ELEMENT_CLASS_BEFORE
                : " " + PSEUDO_HIDE_ELEMENT_CLASS_AFTER;
            if (isSVGElementNode(clone)) {
                clone.className.baseValue += newClassName;
            }
            else {
                clone.className += newClassName;
            }
            return anonymousReplacedElement;
        };
        DocumentCloner.destroy = function (container) {
            if (container.parentNode) {
                container.parentNode.removeChild(container);
                return true;
            }
            return false;
        };
        return DocumentCloner;
    }());
    var PseudoElementType;
    (function (PseudoElementType) {
        PseudoElementType[PseudoElementType["BEFORE"] = 0] = "BEFORE";
        PseudoElementType[PseudoElementType["AFTER"] = 1] = "AFTER";
    })(PseudoElementType || (PseudoElementType = {}));
    var createIFrameContainer = function (ownerDocument, bounds) {
        var cloneIframeContainer = ownerDocument.createElement('iframe');
        cloneIframeContainer.className = 'html2canvas-container';
        cloneIframeContainer.style.visibility = 'hidden';
        cloneIframeContainer.style.position = 'fixed';
        cloneIframeContainer.style.left = '-10000px';
        cloneIframeContainer.style.top = '0px';
        cloneIframeContainer.style.border = '0';
        cloneIframeContainer.width = bounds.width.toString();
        cloneIframeContainer.height = bounds.height.toString();
        cloneIframeContainer.scrolling = 'no'; // ios won't scroll without it
        cloneIframeContainer.setAttribute(IGNORE_ATTRIBUTE, 'true');
        ownerDocument.body.appendChild(cloneIframeContainer);
        return cloneIframeContainer;
    };
    var imageReady = function (img) {
        return new Promise(function (resolve) {
            if (img.complete) {
                resolve();
                return;
            }
            if (!img.src) {
                resolve();
                return;
            }
            img.onload = resolve;
            img.onerror = resolve;
        });
    };
    var imagesReady = function (document) {
        return Promise.all([].slice.call(document.images, 0).map(imageReady));
    };
    var iframeLoader = function (iframe) {
        return new Promise(function (resolve, reject) {
            var cloneWindow = iframe.contentWindow;
            if (!cloneWindow) {
                return reject("No window assigned for iframe");
            }
            var documentClone = cloneWindow.document;
            cloneWindow.onload = iframe.onload = function () {
                cloneWindow.onload = iframe.onload = null;
                var interval = setInterval(function () {
                    if (documentClone.body.childNodes.length > 0 && documentClone.readyState === 'complete') {
                        clearInterval(interval);
                        resolve(iframe);
                    }
                }, 50);
            };
        });
    };
    var ignoredStyleProperties = [
        'all',
        'd',
        'content' // Safari shows pseudoelements if content is set
    ];
    var copyCSSStyles = function (style, target) {
        // Edge does not provide value for cssText
        for (var i = style.length - 1; i >= 0; i--) {
            var property = style.item(i);
            if (ignoredStyleProperties.indexOf(property) === -1) {
                target.style.setProperty(property, style.getPropertyValue(property));
            }
        }
        return target;
    };
    var serializeDoctype = function (doctype) {
        var str = '';
        if (doctype) {
            str += '<!DOCTYPE ';
            if (doctype.name) {
                str += doctype.name;
            }
            if (doctype.internalSubset) {
                str += doctype.internalSubset;
            }
            if (doctype.publicId) {
                str += "\"" + doctype.publicId + "\"";
            }
            if (doctype.systemId) {
                str += "\"" + doctype.systemId + "\"";
            }
            str += '>';
        }
        return str;
    };
    var restoreOwnerScroll = function (ownerDocument, x, y) {
        if (ownerDocument &&
            ownerDocument.defaultView &&
            (x !== ownerDocument.defaultView.pageXOffset || y !== ownerDocument.defaultView.pageYOffset)) {
            ownerDocument.defaultView.scrollTo(x, y);
        }
    };
    var restoreNodeScroll = function (_a) {
        var element = _a[0], x = _a[1], y = _a[2];
        element.scrollLeft = x;
        element.scrollTop = y;
    };
    var PSEUDO_BEFORE = ':before';
    var PSEUDO_AFTER = ':after';
    var PSEUDO_HIDE_ELEMENT_CLASS_BEFORE = '___html2canvas___pseudoelement_before';
    var PSEUDO_HIDE_ELEMENT_CLASS_AFTER = '___html2canvas___pseudoelement_after';
    var PSEUDO_HIDE_ELEMENT_STYLE = "{\n    content: \"\" !important;\n    display: none !important;\n}";
    var createPseudoHideStyles = function (body) {
        createStyles(body, "." + PSEUDO_HIDE_ELEMENT_CLASS_BEFORE + PSEUDO_BEFORE + PSEUDO_HIDE_ELEMENT_STYLE + "\n         ." + PSEUDO_HIDE_ELEMENT_CLASS_AFTER + PSEUDO_AFTER + PSEUDO_HIDE_ELEMENT_STYLE);
    };
    var createStyles = function (body, styles) {
        var document = body.ownerDocument;
        if (document) {
            var style = document.createElement('style');
            style.textContent = styles;
            body.appendChild(style);
        }
    };

    var CacheStorage = /** @class */ (function () {
        function CacheStorage() {
        }
        CacheStorage.getOrigin = function (url) {
            var link = CacheStorage._link;
            if (!link) {
                return 'about:blank';
            }
            link.href = url;
            link.href = link.href; // IE9, LOL! - http://jsfiddle.net/niklasvh/2e48b/
            return link.protocol + link.hostname + link.port;
        };
        CacheStorage.isSameOrigin = function (src) {
            return CacheStorage.getOrigin(src) === CacheStorage._origin;
        };
        CacheStorage.setContext = function (window) {
            CacheStorage._link = window.document.createElement('a');
            CacheStorage._origin = CacheStorage.getOrigin(window.location.href);
        };
        CacheStorage._origin = 'about:blank';
        return CacheStorage;
    }());
    var Cache = /** @class */ (function () {
        function Cache(context, _options) {
            this.context = context;
            this._options = _options;
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            this._cache = {};
        }
        Cache.prototype.addImage = function (src) {
            var result = Promise.resolve();
            if (this.has(src)) {
                return result;
            }
            if (isBlobImage(src) || isRenderable(src)) {
                (this._cache[src] = this.loadImage(src)).catch(function () {
                    // prevent unhandled rejection
                });
                return result;
            }
            return result;
        };
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        Cache.prototype.match = function (src) {
            return this._cache[src];
        };
        Cache.prototype.loadImage = function (key) {
            return __awaiter(this, void 0, void 0, function () {
                var isSameOrigin, useCORS, useProxy, src;
                var _this = this;
                return __generator(this, function (_a) {
                    switch (_a.label) {
                        case 0:
                            isSameOrigin = CacheStorage.isSameOrigin(key);
                            useCORS = !isInlineImage(key) && this._options.useCORS === true && FEATURES.SUPPORT_CORS_IMAGES && !isSameOrigin;
                            useProxy = !isInlineImage(key) &&
                                !isSameOrigin &&
                                !isBlobImage(key) &&
                                typeof this._options.proxy === 'string' &&
                                FEATURES.SUPPORT_CORS_XHR &&
                                !useCORS;
                            if (!isSameOrigin &&
                                this._options.allowTaint === false &&
                                !isInlineImage(key) &&
                                !isBlobImage(key) &&
                                !useProxy &&
                                !useCORS) {
                                return [2 /*return*/];
                            }
                            src = key;
                            if (!useProxy) return [3 /*break*/, 2];
                            return [4 /*yield*/, this.proxy(src)];
                        case 1:
                            src = _a.sent();
                            _a.label = 2;
                        case 2:
                            this.context.logger.debug("Added image " + key.substring(0, 256));
                            return [4 /*yield*/, new Promise(function (resolve, reject) {
                                    var img = new Image();
                                    img.onload = function () { return resolve(img); };
                                    img.onerror = reject;
                                    //ios safari 10.3 taints canvas with data urls unless crossOrigin is set to anonymous
                                    if (isInlineBase64Image(src) || useCORS) {
                                        img.crossOrigin = 'anonymous';
                                    }
                                    img.src = src;
                                    if (img.complete === true) {
                                        // Inline XML images may fail to parse, throwing an Error later on
                                        setTimeout(function () { return resolve(img); }, 500);
                                    }
                                    if (_this._options.imageTimeout > 0) {
                                        setTimeout(function () { return reject("Timed out (" + _this._options.imageTimeout + "ms) loading image"); }, _this._options.imageTimeout);
                                    }
                                })];
                        case 3: return [2 /*return*/, _a.sent()];
                    }
                });
            });
        };
        Cache.prototype.has = function (key) {
            return typeof this._cache[key] !== 'undefined';
        };
        Cache.prototype.keys = function () {
            return Promise.resolve(Object.keys(this._cache));
        };
        Cache.prototype.proxy = function (src) {
            var _this = this;
            var proxy = this._options.proxy;
            if (!proxy) {
                throw new Error('No proxy defined');
            }
            var key = src.substring(0, 256);
            return new Promise(function (resolve, reject) {
                var responseType = FEATURES.SUPPORT_RESPONSE_TYPE ? 'blob' : 'text';
                var xhr = new XMLHttpRequest();
                xhr.onload = function () {
                    if (xhr.status === 200) {
                        if (responseType === 'text') {
                            resolve(xhr.response);
                        }
                        else {
                            var reader_1 = new FileReader();
                            reader_1.addEventListener('load', function () { return resolve(reader_1.result); }, false);
                            reader_1.addEventListener('error', function (e) { return reject(e); }, false);
                            reader_1.readAsDataURL(xhr.response);
                        }
                    }
                    else {
                        reject("Failed to proxy resource " + key + " with status code " + xhr.status);
                    }
                };
                xhr.onerror = reject;
                var queryString = proxy.indexOf('?') > -1 ? '&' : '?';
                xhr.open('GET', "" + proxy + queryString + "url=" + encodeURIComponent(src) + "&responseType=" + responseType);
                if (responseType !== 'text' && xhr instanceof XMLHttpRequest) {
                    xhr.responseType = responseType;
                }
                if (_this._options.imageTimeout) {
                    var timeout_1 = _this._options.imageTimeout;
                    xhr.timeout = timeout_1;
                    xhr.ontimeout = function () { return reject("Timed out (" + timeout_1 + "ms) proxying " + key); };
                }
                xhr.send();
            });
        };
        return Cache;
    }());
    var INLINE_SVG = /^data:image\/svg\+xml/i;
    var INLINE_BASE64 = /^data:image\/.*;base64,/i;
    var INLINE_IMG = /^data:image\/.*/i;
    var isRenderable = function (src) { return FEATURES.SUPPORT_SVG_DRAWING || !isSVG(src); };
    var isInlineImage = function (src) { return INLINE_IMG.test(src); };
    var isInlineBase64Image = function (src) { return INLINE_BASE64.test(src); };
    var isBlobImage = function (src) { return src.substr(0, 4) === 'blob'; };
    var isSVG = function (src) { return src.substr(-3).toLowerCase() === 'svg' || INLINE_SVG.test(src); };

    var Vector = /** @class */ (function () {
        function Vector(x, y) {
            this.type = 0 /* VECTOR */;
            this.x = x;
            this.y = y;
        }
        Vector.prototype.add = function (deltaX, deltaY) {
            return new Vector(this.x + deltaX, this.y + deltaY);
        };
        return Vector;
    }());

    var lerp = function (a, b, t) {
        return new Vector(a.x + (b.x - a.x) * t, a.y + (b.y - a.y) * t);
    };
    var BezierCurve = /** @class */ (function () {
        function BezierCurve(start, startControl, endControl, end) {
            this.type = 1 /* BEZIER_CURVE */;
            this.start = start;
            this.startControl = startControl;
            this.endControl = endControl;
            this.end = end;
        }
        BezierCurve.prototype.subdivide = function (t, firstHalf) {
            var ab = lerp(this.start, this.startControl, t);
            var bc = lerp(this.startControl, this.endControl, t);
            var cd = lerp(this.endControl, this.end, t);
            var abbc = lerp(ab, bc, t);
            var bccd = lerp(bc, cd, t);
            var dest = lerp(abbc, bccd, t);
            return firstHalf ? new BezierCurve(this.start, ab, abbc, dest) : new BezierCurve(dest, bccd, cd, this.end);
        };
        BezierCurve.prototype.add = function (deltaX, deltaY) {
            return new BezierCurve(this.start.add(deltaX, deltaY), this.startControl.add(deltaX, deltaY), this.endControl.add(deltaX, deltaY), this.end.add(deltaX, deltaY));
        };
        BezierCurve.prototype.reverse = function () {
            return new BezierCurve(this.end, this.endControl, this.startControl, this.start);
        };
        return BezierCurve;
    }());
    var isBezierCurve = function (path) { return path.type === 1 /* BEZIER_CURVE */; };

    var BoundCurves = /** @class */ (function () {
        function BoundCurves(element) {
            var styles = element.styles;
            var bounds = element.bounds;
            var _a = getAbsoluteValueForTuple(styles.borderTopLeftRadius, bounds.width, bounds.height), tlh = _a[0], tlv = _a[1];
            var _b = getAbsoluteValueForTuple(styles.borderTopRightRadius, bounds.width, bounds.height), trh = _b[0], trv = _b[1];
            var _c = getAbsoluteValueForTuple(styles.borderBottomRightRadius, bounds.width, bounds.height), brh = _c[0], brv = _c[1];
            var _d = getAbsoluteValueForTuple(styles.borderBottomLeftRadius, bounds.width, bounds.height), blh = _d[0], blv = _d[1];
            var factors = [];
            factors.push((tlh + trh) / bounds.width);
            factors.push((blh + brh) / bounds.width);
            factors.push((tlv + blv) / bounds.height);
            factors.push((trv + brv) / bounds.height);
            var maxFactor = Math.max.apply(Math, factors);
            if (maxFactor > 1) {
                tlh /= maxFactor;
                tlv /= maxFactor;
                trh /= maxFactor;
                trv /= maxFactor;
                brh /= maxFactor;
                brv /= maxFactor;
                blh /= maxFactor;
                blv /= maxFactor;
            }
            var topWidth = bounds.width - trh;
            var rightHeight = bounds.height - brv;
            var bottomWidth = bounds.width - brh;
            var leftHeight = bounds.height - blv;
            var borderTopWidth = styles.borderTopWidth;
            var borderRightWidth = styles.borderRightWidth;
            var borderBottomWidth = styles.borderBottomWidth;
            var borderLeftWidth = styles.borderLeftWidth;
            var paddingTop = getAbsoluteValue(styles.paddingTop, element.bounds.width);
            var paddingRight = getAbsoluteValue(styles.paddingRight, element.bounds.width);
            var paddingBottom = getAbsoluteValue(styles.paddingBottom, element.bounds.width);
            var paddingLeft = getAbsoluteValue(styles.paddingLeft, element.bounds.width);
            this.topLeftBorderDoubleOuterBox =
                tlh > 0 || tlv > 0
                    ? getCurvePoints(bounds.left + borderLeftWidth / 3, bounds.top + borderTopWidth / 3, tlh - borderLeftWidth / 3, tlv - borderTopWidth / 3, CORNER.TOP_LEFT)
                    : new Vector(bounds.left + borderLeftWidth / 3, bounds.top + borderTopWidth / 3);
            this.topRightBorderDoubleOuterBox =
                tlh > 0 || tlv > 0
                    ? getCurvePoints(bounds.left + topWidth, bounds.top + borderTopWidth / 3, trh - borderRightWidth / 3, trv - borderTopWidth / 3, CORNER.TOP_RIGHT)
                    : new Vector(bounds.left + bounds.width - borderRightWidth / 3, bounds.top + borderTopWidth / 3);
            this.bottomRightBorderDoubleOuterBox =
                brh > 0 || brv > 0
                    ? getCurvePoints(bounds.left + bottomWidth, bounds.top + rightHeight, brh - borderRightWidth / 3, brv - borderBottomWidth / 3, CORNER.BOTTOM_RIGHT)
                    : new Vector(bounds.left + bounds.width - borderRightWidth / 3, bounds.top + bounds.height - borderBottomWidth / 3);
            this.bottomLeftBorderDoubleOuterBox =
                blh > 0 || blv > 0
                    ? getCurvePoints(bounds.left + borderLeftWidth / 3, bounds.top + leftHeight, blh - borderLeftWidth / 3, blv - borderBottomWidth / 3, CORNER.BOTTOM_LEFT)
                    : new Vector(bounds.left + borderLeftWidth / 3, bounds.top + bounds.height - borderBottomWidth / 3);
            this.topLeftBorderDoubleInnerBox =
                tlh > 0 || tlv > 0
                    ? getCurvePoints(bounds.left + (borderLeftWidth * 2) / 3, bounds.top + (borderTopWidth * 2) / 3, tlh - (borderLeftWidth * 2) / 3, tlv - (borderTopWidth * 2) / 3, CORNER.TOP_LEFT)
                    : new Vector(bounds.left + (borderLeftWidth * 2) / 3, bounds.top + (borderTopWidth * 2) / 3);
            this.topRightBorderDoubleInnerBox =
                tlh > 0 || tlv > 0
                    ? getCurvePoints(bounds.left + topWidth, bounds.top + (borderTopWidth * 2) / 3, trh - (borderRightWidth * 2) / 3, trv - (borderTopWidth * 2) / 3, CORNER.TOP_RIGHT)
                    : new Vector(bounds.left + bounds.width - (borderRightWidth * 2) / 3, bounds.top + (borderTopWidth * 2) / 3);
            this.bottomRightBorderDoubleInnerBox =
                brh > 0 || brv > 0
                    ? getCurvePoints(bounds.left + bottomWidth, bounds.top + rightHeight, brh - (borderRightWidth * 2) / 3, brv - (borderBottomWidth * 2) / 3, CORNER.BOTTOM_RIGHT)
                    : new Vector(bounds.left + bounds.width - (borderRightWidth * 2) / 3, bounds.top + bounds.height - (borderBottomWidth * 2) / 3);
            this.bottomLeftBorderDoubleInnerBox =
                blh > 0 || blv > 0
                    ? getCurvePoints(bounds.left + (borderLeftWidth * 2) / 3, bounds.top + leftHeight, blh - (borderLeftWidth * 2) / 3, blv - (borderBottomWidth * 2) / 3, CORNER.BOTTOM_LEFT)
                    : new Vector(bounds.left + (borderLeftWidth * 2) / 3, bounds.top + bounds.height - (borderBottomWidth * 2) / 3);
            this.topLeftBorderStroke =
                tlh > 0 || tlv > 0
                    ? getCurvePoints(bounds.left + borderLeftWidth / 2, bounds.top + borderTopWidth / 2, tlh - borderLeftWidth / 2, tlv - borderTopWidth / 2, CORNER.TOP_LEFT)
                    : new Vector(bounds.left + borderLeftWidth / 2, bounds.top + borderTopWidth / 2);
            this.topRightBorderStroke =
                tlh > 0 || tlv > 0
                    ? getCurvePoints(bounds.left + topWidth, bounds.top + borderTopWidth / 2, trh - borderRightWidth / 2, trv - borderTopWidth / 2, CORNER.TOP_RIGHT)
                    : new Vector(bounds.left + bounds.width - borderRightWidth / 2, bounds.top + borderTopWidth / 2);
            this.bottomRightBorderStroke =
                brh > 0 || brv > 0
                    ? getCurvePoints(bounds.left + bottomWidth, bounds.top + rightHeight, brh - borderRightWidth / 2, brv - borderBottomWidth / 2, CORNER.BOTTOM_RIGHT)
                    : new Vector(bounds.left + bounds.width - borderRightWidth / 2, bounds.top + bounds.height - borderBottomWidth / 2);
            this.bottomLeftBorderStroke =
                blh > 0 || blv > 0
                    ? getCurvePoints(bounds.left + borderLeftWidth / 2, bounds.top + leftHeight, blh - borderLeftWidth / 2, blv - borderBottomWidth / 2, CORNER.BOTTOM_LEFT)
                    : new Vector(bounds.left + borderLeftWidth / 2, bounds.top + bounds.height - borderBottomWidth / 2);
            this.topLeftBorderBox =
                tlh > 0 || tlv > 0
                    ? getCurvePoints(bounds.left, bounds.top, tlh, tlv, CORNER.TOP_LEFT)
                    : new Vector(bounds.left, bounds.top);
            this.topRightBorderBox =
                trh > 0 || trv > 0
                    ? getCurvePoints(bounds.left + topWidth, bounds.top, trh, trv, CORNER.TOP_RIGHT)
                    : new Vector(bounds.left + bounds.width, bounds.top);
            this.bottomRightBorderBox =
                brh > 0 || brv > 0
                    ? getCurvePoints(bounds.left + bottomWidth, bounds.top + rightHeight, brh, brv, CORNER.BOTTOM_RIGHT)
                    : new Vector(bounds.left + bounds.width, bounds.top + bounds.height);
            this.bottomLeftBorderBox =
                blh > 0 || blv > 0
                    ? getCurvePoints(bounds.left, bounds.top + leftHeight, blh, blv, CORNER.BOTTOM_LEFT)
                    : new Vector(bounds.left, bounds.top + bounds.height);
            this.topLeftPaddingBox =
                tlh > 0 || tlv > 0
                    ? getCurvePoints(bounds.left + borderLeftWidth, bounds.top + borderTopWidth, Math.max(0, tlh - borderLeftWidth), Math.max(0, tlv - borderTopWidth), CORNER.TOP_LEFT)
                    : new Vector(bounds.left + borderLeftWidth, bounds.top + borderTopWidth);
            this.topRightPaddingBox =
                trh > 0 || trv > 0
                    ? getCurvePoints(bounds.left + Math.min(topWidth, bounds.width - borderRightWidth), bounds.top + borderTopWidth, topWidth > bounds.width + borderRightWidth ? 0 : Math.max(0, trh - borderRightWidth), Math.max(0, trv - borderTopWidth), CORNER.TOP_RIGHT)
                    : new Vector(bounds.left + bounds.width - borderRightWidth, bounds.top + borderTopWidth);
            this.bottomRightPaddingBox =
                brh > 0 || brv > 0
                    ? getCurvePoints(bounds.left + Math.min(bottomWidth, bounds.width - borderLeftWidth), bounds.top + Math.min(rightHeight, bounds.height - borderBottomWidth), Math.max(0, brh - borderRightWidth), Math.max(0, brv - borderBottomWidth), CORNER.BOTTOM_RIGHT)
                    : new Vector(bounds.left + bounds.width - borderRightWidth, bounds.top + bounds.height - borderBottomWidth);
            this.bottomLeftPaddingBox =
                blh > 0 || blv > 0
                    ? getCurvePoints(bounds.left + borderLeftWidth, bounds.top + Math.min(leftHeight, bounds.height - borderBottomWidth), Math.max(0, blh - borderLeftWidth), Math.max(0, blv - borderBottomWidth), CORNER.BOTTOM_LEFT)
                    : new Vector(bounds.left + borderLeftWidth, bounds.top + bounds.height - borderBottomWidth);
            this.topLeftContentBox =
                tlh > 0 || tlv > 0
                    ? getCurvePoints(bounds.left + borderLeftWidth + paddingLeft, bounds.top + borderTopWidth + paddingTop, Math.max(0, tlh - (borderLeftWidth + paddingLeft)), Math.max(0, tlv - (borderTopWidth + paddingTop)), CORNER.TOP_LEFT)
                    : new Vector(bounds.left + borderLeftWidth + paddingLeft, bounds.top + borderTopWidth + paddingTop);
            this.topRightContentBox =
                trh > 0 || trv > 0
                    ? getCurvePoints(bounds.left + Math.min(topWidth, bounds.width + borderLeftWidth + paddingLeft), bounds.top + borderTopWidth + paddingTop, topWidth > bounds.width + borderLeftWidth + paddingLeft ? 0 : trh - borderLeftWidth + paddingLeft, trv - (borderTopWidth + paddingTop), CORNER.TOP_RIGHT)
                    : new Vector(bounds.left + bounds.width - (borderRightWidth + paddingRight), bounds.top + borderTopWidth + paddingTop);
            this.bottomRightContentBox =
                brh > 0 || brv > 0
                    ? getCurvePoints(bounds.left + Math.min(bottomWidth, bounds.width - (borderLeftWidth + paddingLeft)), bounds.top + Math.min(rightHeight, bounds.height + borderTopWidth + paddingTop), Math.max(0, brh - (borderRightWidth + paddingRight)), brv - (borderBottomWidth + paddingBottom), CORNER.BOTTOM_RIGHT)
                    : new Vector(bounds.left + bounds.width - (borderRightWidth + paddingRight), bounds.top + bounds.height - (borderBottomWidth + paddingBottom));
            this.bottomLeftContentBox =
                blh > 0 || blv > 0
                    ? getCurvePoints(bounds.left + borderLeftWidth + paddingLeft, bounds.top + leftHeight, Math.max(0, blh - (borderLeftWidth + paddingLeft)), blv - (borderBottomWidth + paddingBottom), CORNER.BOTTOM_LEFT)
                    : new Vector(bounds.left + borderLeftWidth + paddingLeft, bounds.top + bounds.height - (borderBottomWidth + paddingBottom));
        }
        return BoundCurves;
    }());
    var CORNER;
    (function (CORNER) {
        CORNER[CORNER["TOP_LEFT"] = 0] = "TOP_LEFT";
        CORNER[CORNER["TOP_RIGHT"] = 1] = "TOP_RIGHT";
        CORNER[CORNER["BOTTOM_RIGHT"] = 2] = "BOTTOM_RIGHT";
        CORNER[CORNER["BOTTOM_LEFT"] = 3] = "BOTTOM_LEFT";
    })(CORNER || (CORNER = {}));
    var getCurvePoints = function (x, y, r1, r2, position) {
        var kappa = 4 * ((Math.sqrt(2) - 1) / 3);
        var ox = r1 * kappa; // control point offset horizontal
        var oy = r2 * kappa; // control point offset vertical
        var xm = x + r1; // x-middle
        var ym = y + r2; // y-middle
        switch (position) {
            case CORNER.TOP_LEFT:
                return new BezierCurve(new Vector(x, ym), new Vector(x, ym - oy), new Vector(xm - ox, y), new Vector(xm, y));
            case CORNER.TOP_RIGHT:
                return new BezierCurve(new Vector(x, y), new Vector(x + ox, y), new Vector(xm, ym - oy), new Vector(xm, ym));
            case CORNER.BOTTOM_RIGHT:
                return new BezierCurve(new Vector(xm, y), new Vector(xm, y + oy), new Vector(x + ox, ym), new Vector(x, ym));
            case CORNER.BOTTOM_LEFT:
            default:
                return new BezierCurve(new Vector(xm, ym), new Vector(xm - ox, ym), new Vector(x, y + oy), new Vector(x, y));
        }
    };
    var calculateBorderBoxPath = function (curves) {
        return [curves.topLeftBorderBox, curves.topRightBorderBox, curves.bottomRightBorderBox, curves.bottomLeftBorderBox];
    };
    var calculateContentBoxPath = function (curves) {
        return [
            curves.topLeftContentBox,
            curves.topRightContentBox,
            curves.bottomRightContentBox,
            curves.bottomLeftContentBox
        ];
    };
    var calculatePaddingBoxPath = function (curves) {
        return [
            curves.topLeftPaddingBox,
            curves.topRightPaddingBox,
            curves.bottomRightPaddingBox,
            curves.bottomLeftPaddingBox
        ];
    };

    var TransformEffect = /** @class */ (function () {
        function TransformEffect(offsetX, offsetY, matrix) {
            this.offsetX = offsetX;
            this.offsetY = offsetY;
            this.matrix = matrix;
            this.type = 0 /* TRANSFORM */;
            this.target = 2 /* BACKGROUND_BORDERS */ | 4 /* CONTENT */;
        }
        return TransformEffect;
    }());
    var ClipEffect = /** @class */ (function () {
        function ClipEffect(path, target) {
            this.path = path;
            this.target = target;
            this.type = 1 /* CLIP */;
        }
        return ClipEffect;
    }());
    var OpacityEffect = /** @class */ (function () {
        function OpacityEffect(opacity) {
            this.opacity = opacity;
            this.type = 2 /* OPACITY */;
            this.target = 2 /* BACKGROUND_BORDERS */ | 4 /* CONTENT */;
        }
        return OpacityEffect;
    }());
    var isTransformEffect = function (effect) {
        return effect.type === 0 /* TRANSFORM */;
    };
    var isClipEffect = function (effect) { return effect.type === 1 /* CLIP */; };
    var isOpacityEffect = function (effect) { return effect.type === 2 /* OPACITY */; };

    var equalPath = function (a, b) {
        if (a.length === b.length) {
            return a.some(function (v, i) { return v === b[i]; });
        }
        return false;
    };
    var transformPath = function (path, deltaX, deltaY, deltaW, deltaH) {
        return path.map(function (point, index) {
            switch (index) {
                case 0:
                    return point.add(deltaX, deltaY);
                case 1:
                    return point.add(deltaX + deltaW, deltaY);
                case 2:
                    return point.add(deltaX + deltaW, deltaY + deltaH);
                case 3:
                    return point.add(deltaX, deltaY + deltaH);
            }
            return point;
        });
    };

    var StackingContext = /** @class */ (function () {
        function StackingContext(container) {
            this.element = container;
            this.inlineLevel = [];
            this.nonInlineLevel = [];
            this.negativeZIndex = [];
            this.zeroOrAutoZIndexOrTransformedOrOpacity = [];
            this.positiveZIndex = [];
            this.nonPositionedFloats = [];
            this.nonPositionedInlineLevel = [];
        }
        return StackingContext;
    }());
    var ElementPaint = /** @class */ (function () {
        function ElementPaint(container, parent) {
            this.container = container;
            this.parent = parent;
            this.effects = [];
            this.curves = new BoundCurves(this.container);
            if (this.container.styles.opacity < 1) {
                this.effects.push(new OpacityEffect(this.container.styles.opacity));
            }
            if (this.container.styles.transform !== null) {
                var offsetX = this.container.bounds.left + this.container.styles.transformOrigin[0].number;
                var offsetY = this.container.bounds.top + this.container.styles.transformOrigin[1].number;
                var matrix = this.container.styles.transform;
                this.effects.push(new TransformEffect(offsetX, offsetY, matrix));
            }
            if (this.container.styles.overflowX !== 0 /* VISIBLE */) {
                var borderBox = calculateBorderBoxPath(this.curves);
                var paddingBox = calculatePaddingBoxPath(this.curves);
                if (equalPath(borderBox, paddingBox)) {
                    this.effects.push(new ClipEffect(borderBox, 2 /* BACKGROUND_BORDERS */ | 4 /* CONTENT */));
                }
                else {
                    this.effects.push(new ClipEffect(borderBox, 2 /* BACKGROUND_BORDERS */));
                    this.effects.push(new ClipEffect(paddingBox, 4 /* CONTENT */));
                }
            }
        }
        ElementPaint.prototype.getEffects = function (target) {
            var inFlow = [2 /* ABSOLUTE */, 3 /* FIXED */].indexOf(this.container.styles.position) === -1;
            var parent = this.parent;
            var effects = this.effects.slice(0);
            while (parent) {
                var croplessEffects = parent.effects.filter(function (effect) { return !isClipEffect(effect); });
                if (inFlow || parent.container.styles.position !== 0 /* STATIC */ || !parent.parent) {
                    effects.unshift.apply(effects, croplessEffects);
                    inFlow = [2 /* ABSOLUTE */, 3 /* FIXED */].indexOf(parent.container.styles.position) === -1;
                    if (parent.container.styles.overflowX !== 0 /* VISIBLE */) {
                        var borderBox = calculateBorderBoxPath(parent.curves);
                        var paddingBox = calculatePaddingBoxPath(parent.curves);
                        if (!equalPath(borderBox, paddingBox)) {
                            effects.unshift(new ClipEffect(paddingBox, 2 /* BACKGROUND_BORDERS */ | 4 /* CONTENT */));
                        }
                    }
                }
                else {
                    effects.unshift.apply(effects, croplessEffects);
                }
                parent = parent.parent;
            }
            return effects.filter(function (effect) { return contains(effect.target, target); });
        };
        return ElementPaint;
    }());
    var parseStackTree = function (parent, stackingContext, realStackingContext, listItems) {
        parent.container.elements.forEach(function (child) {
            var treatAsRealStackingContext = contains(child.flags, 4 /* CREATES_REAL_STACKING_CONTEXT */);
            var createsStackingContext = contains(child.flags, 2 /* CREATES_STACKING_CONTEXT */);
            var paintContainer = new ElementPaint(child, parent);
            if (contains(child.styles.display, 2048 /* LIST_ITEM */)) {
                listItems.push(paintContainer);
            }
            var listOwnerItems = contains(child.flags, 8 /* IS_LIST_OWNER */) ? [] : listItems;
            if (treatAsRealStackingContext || createsStackingContext) {
                var parentStack = treatAsRealStackingContext || child.styles.isPositioned() ? realStackingContext : stackingContext;
                var stack = new StackingContext(paintContainer);
                if (child.styles.isPositioned() || child.styles.opacity < 1 || child.styles.isTransformed()) {
                    var order_1 = child.styles.zIndex.order;
                    if (order_1 < 0) {
                        var index_1 = 0;
                        parentStack.negativeZIndex.some(function (current, i) {
                            if (order_1 > current.element.container.styles.zIndex.order) {
                                index_1 = i;
                                return false;
                            }
                            else if (index_1 > 0) {
                                return true;
                            }
                            return false;
                        });
                        parentStack.negativeZIndex.splice(index_1, 0, stack);
                    }
                    else if (order_1 > 0) {
                        var index_2 = 0;
                        parentStack.positiveZIndex.some(function (current, i) {
                            if (order_1 >= current.element.container.styles.zIndex.order) {
                                index_2 = i + 1;
                                return false;
                            }
                            else if (index_2 > 0) {
                                return true;
                            }
                            return false;
                        });
                        parentStack.positiveZIndex.splice(index_2, 0, stack);
                    }
                    else {
                        parentStack.zeroOrAutoZIndexOrTransformedOrOpacity.push(stack);
                    }
                }
                else {
                    if (child.styles.isFloating()) {
                        parentStack.nonPositionedFloats.push(stack);
                    }
                    else {
                        parentStack.nonPositionedInlineLevel.push(stack);
                    }
                }
                parseStackTree(paintContainer, stack, treatAsRealStackingContext ? stack : realStackingContext, listOwnerItems);
            }
            else {
                if (child.styles.isInlineLevel()) {
                    stackingContext.inlineLevel.push(paintContainer);
                }
                else {
                    stackingContext.nonInlineLevel.push(paintContainer);
                }
                parseStackTree(paintContainer, stackingContext, realStackingContext, listOwnerItems);
            }
            if (contains(child.flags, 8 /* IS_LIST_OWNER */)) {
                processListItems(child, listOwnerItems);
            }
        });
    };
    var processListItems = function (owner, elements) {
        var numbering = owner instanceof OLElementContainer ? owner.start : 1;
        var reversed = owner instanceof OLElementContainer ? owner.reversed : false;
        for (var i = 0; i < elements.length; i++) {
            var item = elements[i];
            if (item.container instanceof LIElementContainer &&
                typeof item.container.value === 'number' &&
                item.container.value !== 0) {
                numbering = item.container.value;
            }
            item.listValue = createCounterText(numbering, item.container.styles.listStyleType, true);
            numbering += reversed ? -1 : 1;
        }
    };
    var parseStackingContexts = function (container) {
        var paintContainer = new ElementPaint(container, null);
        var root = new StackingContext(paintContainer);
        var listItems = [];
        parseStackTree(paintContainer, root, root, listItems);
        processListItems(paintContainer.container, listItems);
        return root;
    };

    var parsePathForBorder = function (curves, borderSide) {
        switch (borderSide) {
            case 0:
                return createPathFromCurves(curves.topLeftBorderBox, curves.topLeftPaddingBox, curves.topRightBorderBox, curves.topRightPaddingBox);
            case 1:
                return createPathFromCurves(curves.topRightBorderBox, curves.topRightPaddingBox, curves.bottomRightBorderBox, curves.bottomRightPaddingBox);
            case 2:
                return createPathFromCurves(curves.bottomRightBorderBox, curves.bottomRightPaddingBox, curves.bottomLeftBorderBox, curves.bottomLeftPaddingBox);
            case 3:
            default:
                return createPathFromCurves(curves.bottomLeftBorderBox, curves.bottomLeftPaddingBox, curves.topLeftBorderBox, curves.topLeftPaddingBox);
        }
    };
    var parsePathForBorderDoubleOuter = function (curves, borderSide) {
        switch (borderSide) {
            case 0:
                return createPathFromCurves(curves.topLeftBorderBox, curves.topLeftBorderDoubleOuterBox, curves.topRightBorderBox, curves.topRightBorderDoubleOuterBox);
            case 1:
                return createPathFromCurves(curves.topRightBorderBox, curves.topRightBorderDoubleOuterBox, curves.bottomRightBorderBox, curves.bottomRightBorderDoubleOuterBox);
            case 2:
                return createPathFromCurves(curves.bottomRightBorderBox, curves.bottomRightBorderDoubleOuterBox, curves.bottomLeftBorderBox, curves.bottomLeftBorderDoubleOuterBox);
            case 3:
            default:
                return createPathFromCurves(curves.bottomLeftBorderBox, curves.bottomLeftBorderDoubleOuterBox, curves.topLeftBorderBox, curves.topLeftBorderDoubleOuterBox);
        }
    };
    var parsePathForBorderDoubleInner = function (curves, borderSide) {
        switch (borderSide) {
            case 0:
                return createPathFromCurves(curves.topLeftBorderDoubleInnerBox, curves.topLeftPaddingBox, curves.topRightBorderDoubleInnerBox, curves.topRightPaddingBox);
            case 1:
                return createPathFromCurves(curves.topRightBorderDoubleInnerBox, curves.topRightPaddingBox, curves.bottomRightBorderDoubleInnerBox, curves.bottomRightPaddingBox);
            case 2:
                return createPathFromCurves(curves.bottomRightBorderDoubleInnerBox, curves.bottomRightPaddingBox, curves.bottomLeftBorderDoubleInnerBox, curves.bottomLeftPaddingBox);
            case 3:
            default:
                return createPathFromCurves(curves.bottomLeftBorderDoubleInnerBox, curves.bottomLeftPaddingBox, curves.topLeftBorderDoubleInnerBox, curves.topLeftPaddingBox);
        }
    };
    var parsePathForBorderStroke = function (curves, borderSide) {
        switch (borderSide) {
            case 0:
                return createStrokePathFromCurves(curves.topLeftBorderStroke, curves.topRightBorderStroke);
            case 1:
                return createStrokePathFromCurves(curves.topRightBorderStroke, curves.bottomRightBorderStroke);
            case 2:
                return createStrokePathFromCurves(curves.bottomRightBorderStroke, curves.bottomLeftBorderStroke);
            case 3:
            default:
                return createStrokePathFromCurves(curves.bottomLeftBorderStroke, curves.topLeftBorderStroke);
        }
    };
    var createStrokePathFromCurves = function (outer1, outer2) {
        var path = [];
        if (isBezierCurve(outer1)) {
            path.push(outer1.subdivide(0.5, false));
        }
        else {
            path.push(outer1);
        }
        if (isBezierCurve(outer2)) {
            path.push(outer2.subdivide(0.5, true));
        }
        else {
            path.push(outer2);
        }
        return path;
    };
    var createPathFromCurves = function (outer1, inner1, outer2, inner2) {
        var path = [];
        if (isBezierCurve(outer1)) {
            path.push(outer1.subdivide(0.5, false));
        }
        else {
            path.push(outer1);
        }
        if (isBezierCurve(outer2)) {
            path.push(outer2.subdivide(0.5, true));
        }
        else {
            path.push(outer2);
        }
        if (isBezierCurve(inner2)) {
            path.push(inner2.subdivide(0.5, true).reverse());
        }
        else {
            path.push(inner2);
        }
        if (isBezierCurve(inner1)) {
            path.push(inner1.subdivide(0.5, false).reverse());
        }
        else {
            path.push(inner1);
        }
        return path;
    };

    var paddingBox = function (element) {
        var bounds = element.bounds;
        var styles = element.styles;
        return bounds.add(styles.borderLeftWidth, styles.borderTopWidth, -(styles.borderRightWidth + styles.borderLeftWidth), -(styles.borderTopWidth + styles.borderBottomWidth));
    };
    var contentBox = function (element) {
        var styles = element.styles;
        var bounds = element.bounds;
        var paddingLeft = getAbsoluteValue(styles.paddingLeft, bounds.width);
        var paddingRight = getAbsoluteValue(styles.paddingRight, bounds.width);
        var paddingTop = getAbsoluteValue(styles.paddingTop, bounds.width);
        var paddingBottom = getAbsoluteValue(styles.paddingBottom, bounds.width);
        return bounds.add(paddingLeft + styles.borderLeftWidth, paddingTop + styles.borderTopWidth, -(styles.borderRightWidth + styles.borderLeftWidth + paddingLeft + paddingRight), -(styles.borderTopWidth + styles.borderBottomWidth + paddingTop + paddingBottom));
    };

    var calculateBackgroundPositioningArea = function (backgroundOrigin, element) {
        if (backgroundOrigin === 0 /* BORDER_BOX */) {
            return element.bounds;
        }
        if (backgroundOrigin === 2 /* CONTENT_BOX */) {
            return contentBox(element);
        }
        return paddingBox(element);
    };
    var calculateBackgroundPaintingArea = function (backgroundClip, element) {
        if (backgroundClip === 0 /* BORDER_BOX */) {
            return element.bounds;
        }
        if (backgroundClip === 2 /* CONTENT_BOX */) {
            return contentBox(element);
        }
        return paddingBox(element);
    };
    var calculateBackgroundRendering = function (container, index, intrinsicSize) {
        var backgroundPositioningArea = calculateBackgroundPositioningArea(getBackgroundValueForIndex(container.styles.backgroundOrigin, index), container);
        var backgroundPaintingArea = calculateBackgroundPaintingArea(getBackgroundValueForIndex(container.styles.backgroundClip, index), container);
        var backgroundImageSize = calculateBackgroundSize(getBackgroundValueForIndex(container.styles.backgroundSize, index), intrinsicSize, backgroundPositioningArea);
        var sizeWidth = backgroundImageSize[0], sizeHeight = backgroundImageSize[1];
        var position = getAbsoluteValueForTuple(getBackgroundValueForIndex(container.styles.backgroundPosition, index), backgroundPositioningArea.width - sizeWidth, backgroundPositioningArea.height - sizeHeight);
        var path = calculateBackgroundRepeatPath(getBackgroundValueForIndex(container.styles.backgroundRepeat, index), position, backgroundImageSize, backgroundPositioningArea, backgroundPaintingArea);
        var offsetX = Math.round(backgroundPositioningArea.left + position[0]);
        var offsetY = Math.round(backgroundPositioningArea.top + position[1]);
        return [path, offsetX, offsetY, sizeWidth, sizeHeight];
    };
    var isAuto = function (token) { return isIdentToken(token) && token.value === BACKGROUND_SIZE.AUTO; };
    var hasIntrinsicValue = function (value) { return typeof value === 'number'; };
    var calculateBackgroundSize = function (size, _a, bounds) {
        var intrinsicWidth = _a[0], intrinsicHeight = _a[1], intrinsicProportion = _a[2];
        var first = size[0], second = size[1];
        if (!first) {
            return [0, 0];
        }
        if (isLengthPercentage(first) && second && isLengthPercentage(second)) {
            return [getAbsoluteValue(first, bounds.width), getAbsoluteValue(second, bounds.height)];
        }
        var hasIntrinsicProportion = hasIntrinsicValue(intrinsicProportion);
        if (isIdentToken(first) && (first.value === BACKGROUND_SIZE.CONTAIN || first.value === BACKGROUND_SIZE.COVER)) {
            if (hasIntrinsicValue(intrinsicProportion)) {
                var targetRatio = bounds.width / bounds.height;
                return targetRatio < intrinsicProportion !== (first.value === BACKGROUND_SIZE.COVER)
                    ? [bounds.width, bounds.width / intrinsicProportion]
                    : [bounds.height * intrinsicProportion, bounds.height];
            }
            return [bounds.width, bounds.height];
        }
        var hasIntrinsicWidth = hasIntrinsicValue(intrinsicWidth);
        var hasIntrinsicHeight = hasIntrinsicValue(intrinsicHeight);
        var hasIntrinsicDimensions = hasIntrinsicWidth || hasIntrinsicHeight;
        // If the background-size is auto or auto auto:
        if (isAuto(first) && (!second || isAuto(second))) {
            // If the image has both horizontal and vertical intrinsic dimensions, it's rendered at that size.
            if (hasIntrinsicWidth && hasIntrinsicHeight) {
                return [intrinsicWidth, intrinsicHeight];
            }
            // If the image has no intrinsic dimensions and has no intrinsic proportions,
            // it's rendered at the size of the background positioning area.
            if (!hasIntrinsicProportion && !hasIntrinsicDimensions) {
                return [bounds.width, bounds.height];
            }
            // TODO If the image has no intrinsic dimensions but has intrinsic proportions, it's rendered as if contain had been specified instead.
            // If the image has only one intrinsic dimension and has intrinsic proportions, it's rendered at the size corresponding to that one dimension.
            // The other dimension is computed using the specified dimension and the intrinsic proportions.
            if (hasIntrinsicDimensions && hasIntrinsicProportion) {
                var width_1 = hasIntrinsicWidth
                    ? intrinsicWidth
                    : intrinsicHeight * intrinsicProportion;
                var height_1 = hasIntrinsicHeight
                    ? intrinsicHeight
                    : intrinsicWidth / intrinsicProportion;
                return [width_1, height_1];
            }
            // If the image has only one intrinsic dimension but has no intrinsic proportions,
            // it's rendered using the specified dimension and the other dimension of the background positioning area.
            var width_2 = hasIntrinsicWidth ? intrinsicWidth : bounds.width;
            var height_2 = hasIntrinsicHeight ? intrinsicHeight : bounds.height;
            return [width_2, height_2];
        }
        // If the image has intrinsic proportions, it's stretched to the specified dimension.
        // The unspecified dimension is computed using the specified dimension and the intrinsic proportions.
        if (hasIntrinsicProportion) {
            var width_3 = 0;
            var height_3 = 0;
            if (isLengthPercentage(first)) {
                width_3 = getAbsoluteValue(first, bounds.width);
            }
            else if (isLengthPercentage(second)) {
                height_3 = getAbsoluteValue(second, bounds.height);
            }
            if (isAuto(first)) {
                width_3 = height_3 * intrinsicProportion;
            }
            else if (!second || isAuto(second)) {
                height_3 = width_3 / intrinsicProportion;
            }
            return [width_3, height_3];
        }
        // If the image has no intrinsic proportions, it's stretched to the specified dimension.
        // The unspecified dimension is computed using the image's corresponding intrinsic dimension,
        // if there is one. If there is no such intrinsic dimension,
        // it becomes the corresponding dimension of the background positioning area.
        var width = null;
        var height = null;
        if (isLengthPercentage(first)) {
            width = getAbsoluteValue(first, bounds.width);
        }
        else if (second && isLengthPercentage(second)) {
            height = getAbsoluteValue(second, bounds.height);
        }
        if (width !== null && (!second || isAuto(second))) {
            height =
                hasIntrinsicWidth && hasIntrinsicHeight
                    ? (width / intrinsicWidth) * intrinsicHeight
                    : bounds.height;
        }
        if (height !== null && isAuto(first)) {
            width =
                hasIntrinsicWidth && hasIntrinsicHeight
                    ? (height / intrinsicHeight) * intrinsicWidth
                    : bounds.width;
        }
        if (width !== null && height !== null) {
            return [width, height];
        }
        throw new Error("Unable to calculate background-size for element");
    };
    var getBackgroundValueForIndex = function (values, index) {
        var value = values[index];
        if (typeof value === 'undefined') {
            return values[0];
        }
        return value;
    };
    var calculateBackgroundRepeatPath = function (repeat, _a, _b, backgroundPositioningArea, backgroundPaintingArea) {
        var x = _a[0], y = _a[1];
        var width = _b[0], height = _b[1];
        switch (repeat) {
            case 2 /* REPEAT_X */:
                return [
                    new Vector(Math.round(backgroundPositioningArea.left), Math.round(backgroundPositioningArea.top + y)),
                    new Vector(Math.round(backgroundPositioningArea.left + backgroundPositioningArea.width), Math.round(backgroundPositioningArea.top + y)),
                    new Vector(Math.round(backgroundPositioningArea.left + backgroundPositioningArea.width), Math.round(height + backgroundPositioningArea.top + y)),
                    new Vector(Math.round(backgroundPositioningArea.left), Math.round(height + backgroundPositioningArea.top + y))
                ];
            case 3 /* REPEAT_Y */:
                return [
                    new Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.top)),
                    new Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.top)),
                    new Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.height + backgroundPositioningArea.top)),
                    new Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.height + backgroundPositioningArea.top))
                ];
            case 1 /* NO_REPEAT */:
                return [
                    new Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.top + y)),
                    new Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.top + y)),
                    new Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.top + y + height)),
                    new Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.top + y + height))
                ];
            default:
                return [
                    new Vector(Math.round(backgroundPaintingArea.left), Math.round(backgroundPaintingArea.top)),
                    new Vector(Math.round(backgroundPaintingArea.left + backgroundPaintingArea.width), Math.round(backgroundPaintingArea.top)),
                    new Vector(Math.round(backgroundPaintingArea.left + backgroundPaintingArea.width), Math.round(backgroundPaintingArea.height + backgroundPaintingArea.top)),
                    new Vector(Math.round(backgroundPaintingArea.left), Math.round(backgroundPaintingArea.height + backgroundPaintingArea.top))
                ];
        }
    };

    var SMALL_IMAGE = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';

    var SAMPLE_TEXT = 'Hidden Text';
    var FontMetrics = /** @class */ (function () {
        function FontMetrics(document) {
            this._data = {};
            this._document = document;
        }
        FontMetrics.prototype.parseMetrics = function (fontFamily, fontSize) {
            var container = this._document.createElement('div');
            var img = this._document.createElement('img');
            var span = this._document.createElement('span');
            var body = this._document.body;
            container.style.visibility = 'hidden';
            container.style.fontFamily = fontFamily;
            container.style.fontSize = fontSize;
            container.style.margin = '0';
            container.style.padding = '0';
            container.style.whiteSpace = 'nowrap';
            body.appendChild(container);
            img.src = SMALL_IMAGE;
            img.width = 1;
            img.height = 1;
            img.style.margin = '0';
            img.style.padding = '0';
            img.style.verticalAlign = 'baseline';
            span.style.fontFamily = fontFamily;
            span.style.fontSize = fontSize;
            span.style.margin = '0';
            span.style.padding = '0';
            span.appendChild(this._document.createTextNode(SAMPLE_TEXT));
            container.appendChild(span);
            container.appendChild(img);
            var baseline = img.offsetTop - span.offsetTop + 2;
            container.removeChild(span);
            container.appendChild(this._document.createTextNode(SAMPLE_TEXT));
            container.style.lineHeight = 'normal';
            img.style.verticalAlign = 'super';
            var middle = img.offsetTop - container.offsetTop + 2;
            body.removeChild(container);
            return { baseline: baseline, middle: middle };
        };
        FontMetrics.prototype.getMetrics = function (fontFamily, fontSize) {
            var key = fontFamily + " " + fontSize;
            if (typeof this._data[key] === 'undefined') {
                this._data[key] = this.parseMetrics(fontFamily, fontSize);
            }
            return this._data[key];
        };
        return FontMetrics;
    }());

    var Renderer = /** @class */ (function () {
        function Renderer(context, options) {
            this.context = context;
            this.options = options;
        }
        return Renderer;
    }());

    var MASK_OFFSET = 10000;
    var CanvasRenderer = /** @class */ (function (_super) {
        __extends(CanvasRenderer, _super);
        function CanvasRenderer(context, options) {
            var _this = _super.call(this, context, options) || this;
            _this._activeEffects = [];
            _this.canvas = options.canvas ? options.canvas : document.createElement('canvas');
            _this.ctx = _this.canvas.getContext('2d');
            if (!options.canvas) {
                _this.canvas.width = Math.floor(options.width * options.scale);
                _this.canvas.height = Math.floor(options.height * options.scale);
                _this.canvas.style.width = options.width + "px";
                _this.canvas.style.height = options.height + "px";
            }
            _this.fontMetrics = new FontMetrics(document);
            _this.ctx.scale(_this.options.scale, _this.options.scale);
            _this.ctx.translate(-options.x, -options.y);
            _this.ctx.textBaseline = 'bottom';
            _this._activeEffects = [];
            _this.context.logger.debug("Canvas renderer initialized (" + options.width + "x" + options.height + ") with scale " + options.scale);
            return _this;
        }
        CanvasRenderer.prototype.applyEffects = function (effects) {
            var _this = this;
            while (this._activeEffects.length) {
                this.popEffect();
            }
            effects.forEach(function (effect) { return _this.applyEffect(effect); });
        };
        CanvasRenderer.prototype.applyEffect = function (effect) {
            this.ctx.save();
            if (isOpacityEffect(effect)) {
                this.ctx.globalAlpha = effect.opacity;
            }
            if (isTransformEffect(effect)) {
                this.ctx.translate(effect.offsetX, effect.offsetY);
                this.ctx.transform(effect.matrix[0], effect.matrix[1], effect.matrix[2], effect.matrix[3], effect.matrix[4], effect.matrix[5]);
                this.ctx.translate(-effect.offsetX, -effect.offsetY);
            }
            if (isClipEffect(effect)) {
                this.path(effect.path);
                this.ctx.clip();
            }
            this._activeEffects.push(effect);
        };
        CanvasRenderer.prototype.popEffect = function () {
            this._activeEffects.pop();
            this.ctx.restore();
        };
        CanvasRenderer.prototype.renderStack = function (stack) {
            return __awaiter(this, void 0, void 0, function () {
                var styles;
                return __generator(this, function (_a) {
                    switch (_a.label) {
                        case 0:
                            styles = stack.element.container.styles;
                            if (!styles.isVisible()) return [3 /*break*/, 2];
                            return [4 /*yield*/, this.renderStackContent(stack)];
                        case 1:
                            _a.sent();
                            _a.label = 2;
                        case 2: return [2 /*return*/];
                    }
                });
            });
        };
        CanvasRenderer.prototype.renderNode = function (paint) {
            return __awaiter(this, void 0, void 0, function () {
                return __generator(this, function (_a) {
                    switch (_a.label) {
                        case 0:
                            if (contains(paint.container.flags, 16 /* DEBUG_RENDER */)) {
                                debugger;
                            }
                            if (!paint.container.styles.isVisible()) return [3 /*break*/, 3];
                            return [4 /*yield*/, this.renderNodeBackgroundAndBorders(paint)];
                        case 1:
                            _a.sent();
                            return [4 /*yield*/, this.renderNodeContent(paint)];
                        case 2:
                            _a.sent();
                            _a.label = 3;
                        case 3: return [2 /*return*/];
                    }
                });
            });
        };
        CanvasRenderer.prototype.renderTextWithLetterSpacing = function (text, letterSpacing, baseline) {
            var _this = this;
            if (letterSpacing === 0) {
                this.ctx.fillText(text.text, text.bounds.left, text.bounds.top + baseline);
            }
            else {
                var letters = segmentGraphemes(text.text);
                letters.reduce(function (left, letter) {
                    _this.ctx.fillText(letter, left, text.bounds.top + baseline);
                    return left + _this.ctx.measureText(letter).width;
                }, text.bounds.left);
            }
        };
        CanvasRenderer.prototype.createFontStyle = function (styles) {
            var fontVariant = styles.fontVariant
                .filter(function (variant) { return variant === 'normal' || variant === 'small-caps'; })
                .join('');
            var fontFamily = fixIOSSystemFonts(styles.fontFamily).join(', ');
            var fontSize = isDimensionToken(styles.fontSize)
                ? "" + styles.fontSize.number + styles.fontSize.unit
                : styles.fontSize.number + "px";
            return [
                [styles.fontStyle, fontVariant, styles.fontWeight, fontSize, fontFamily].join(' '),
                fontFamily,
                fontSize
            ];
        };
        CanvasRenderer.prototype.renderTextNode = function (text, styles) {
            return __awaiter(this, void 0, void 0, function () {
                var _a, font, fontFamily, fontSize, _b, baseline, middle, paintOrder;
                var _this = this;
                return __generator(this, function (_c) {
                    _a = this.createFontStyle(styles), font = _a[0], fontFamily = _a[1], fontSize = _a[2];
                    this.ctx.font = font;
                    this.ctx.direction = styles.direction === 1 /* RTL */ ? 'rtl' : 'ltr';
                    this.ctx.textAlign = 'left';
                    this.ctx.textBaseline = 'alphabetic';
                    _b = this.fontMetrics.getMetrics(fontFamily, fontSize), baseline = _b.baseline, middle = _b.middle;
                    paintOrder = styles.paintOrder;
                    text.textBounds.forEach(function (text) {
                        paintOrder.forEach(function (paintOrderLayer) {
                            switch (paintOrderLayer) {
                                case 0 /* FILL */:
                                    _this.ctx.fillStyle = asString(styles.color);
                                    _this.renderTextWithLetterSpacing(text, styles.letterSpacing, baseline);
                                    var textShadows = styles.textShadow;
                                    if (textShadows.length && text.text.trim().length) {
                                        textShadows
                                            .slice(0)
                                            .reverse()
                                            .forEach(function (textShadow) {
                                            _this.ctx.shadowColor = asString(textShadow.color);
                                            _this.ctx.shadowOffsetX = textShadow.offsetX.number * _this.options.scale;
                                            _this.ctx.shadowOffsetY = textShadow.offsetY.number * _this.options.scale;
                                            _this.ctx.shadowBlur = textShadow.blur.number;
                                            _this.renderTextWithLetterSpacing(text, styles.letterSpacing, baseline);
                                        });
                                        _this.ctx.shadowColor = '';
                                        _this.ctx.shadowOffsetX = 0;
                                        _this.ctx.shadowOffsetY = 0;
                                        _this.ctx.shadowBlur = 0;
                                    }
                                    if (styles.textDecorationLine.length) {
                                        _this.ctx.fillStyle = asString(styles.textDecorationColor || styles.color);
                                        styles.textDecorationLine.forEach(function (textDecorationLine) {
                                            switch (textDecorationLine) {
                                                case 1 /* UNDERLINE */:
                                                    // Draws a line at the baseline of the font
                                                    // TODO As some browsers display the line as more than 1px if the font-size is big,
                                                    // need to take that into account both in position and size
                                                    _this.ctx.fillRect(text.bounds.left, Math.round(text.bounds.top + baseline), text.bounds.width, 1);
                                                    break;
                                                case 2 /* OVERLINE */:
                                                    _this.ctx.fillRect(text.bounds.left, Math.round(text.bounds.top), text.bounds.width, 1);
                                                    break;
                                                case 3 /* LINE_THROUGH */:
                                                    // TODO try and find exact position for line-through
                                                    _this.ctx.fillRect(text.bounds.left, Math.ceil(text.bounds.top + middle), text.bounds.width, 1);
                                                    break;
                                            }
                                        });
                                    }
                                    break;
                                case 1 /* STROKE */:
                                    if (styles.webkitTextStrokeWidth && text.text.trim().length) {
                                        _this.ctx.strokeStyle = asString(styles.webkitTextStrokeColor);
                                        _this.ctx.lineWidth = styles.webkitTextStrokeWidth;
                                        // eslint-disable-next-line @typescript-eslint/no-explicit-any
                                        _this.ctx.lineJoin = !!window.chrome ? 'miter' : 'round';
                                        _this.ctx.strokeText(text.text, text.bounds.left, text.bounds.top + baseline);
                                    }
                                    _this.ctx.strokeStyle = '';
                                    _this.ctx.lineWidth = 0;
                                    _this.ctx.lineJoin = 'miter';
                                    break;
                            }
                        });
                    });
                    return [2 /*return*/];
                });
            });
        };
        CanvasRenderer.prototype.renderReplacedElement = function (container, curves, image) {
            if (image && container.intrinsicWidth > 0 && container.intrinsicHeight > 0) {
                var box = contentBox(container);
                var path = calculatePaddingBoxPath(curves);
                this.path(path);
                this.ctx.save();
                this.ctx.clip();
                this.ctx.drawImage(image, 0, 0, container.intrinsicWidth, container.intrinsicHeight, box.left, box.top, box.width, box.height);
                this.ctx.restore();
            }
        };
        CanvasRenderer.prototype.renderNodeContent = function (paint) {
            return __awaiter(this, void 0, void 0, function () {
                var container, curves, styles, _i, _a, child, image, image, iframeRenderer, canvas, size, _b, fontFamily, fontSize, baseline, bounds, x, textBounds, img, image, url, fontFamily, bounds;
                return __generator(this, function (_c) {
                    switch (_c.label) {
                        case 0:
                            this.applyEffects(paint.getEffects(4 /* CONTENT */));
                            container = paint.container;
                            curves = paint.curves;
                            styles = container.styles;
                            _i = 0, _a = container.textNodes;
                            _c.label = 1;
                        case 1:
                            if (!(_i < _a.length)) return [3 /*break*/, 4];
                            child = _a[_i];
                            return [4 /*yield*/, this.renderTextNode(child, styles)];
                        case 2:
                            _c.sent();
                            _c.label = 3;
                        case 3:
                            _i++;
                            return [3 /*break*/, 1];
                        case 4:
                            if (!(container instanceof ImageElementContainer)) return [3 /*break*/, 8];
                            _c.label = 5;
                        case 5:
                            _c.trys.push([5, 7, , 8]);
                            return [4 /*yield*/, this.context.cache.match(container.src)];
                        case 6:
                            image = _c.sent();
                            this.renderReplacedElement(container, curves, image);
                            return [3 /*break*/, 8];
                        case 7:
                            _c.sent();
                            this.context.logger.error("Error loading image " + container.src);
                            return [3 /*break*/, 8];
                        case 8:
                            if (container instanceof CanvasElementContainer) {
                                this.renderReplacedElement(container, curves, container.canvas);
                            }
                            if (!(container instanceof SVGElementContainer)) return [3 /*break*/, 12];
                            _c.label = 9;
                        case 9:
                            _c.trys.push([9, 11, , 12]);
                            return [4 /*yield*/, this.context.cache.match(container.svg)];
                        case 10:
                            image = _c.sent();
                            this.renderReplacedElement(container, curves, image);
                            return [3 /*break*/, 12];
                        case 11:
                            _c.sent();
                            this.context.logger.error("Error loading svg " + container.svg.substring(0, 255));
                            return [3 /*break*/, 12];
                        case 12:
                            if (!(container instanceof IFrameElementContainer && container.tree)) return [3 /*break*/, 14];
                            iframeRenderer = new CanvasRenderer(this.context, {
                                scale: this.options.scale,
                                backgroundColor: container.backgroundColor,
                                x: 0,
                                y: 0,
                                width: container.width,
                                height: container.height
                            });
                            return [4 /*yield*/, iframeRenderer.render(container.tree)];
                        case 13:
                            canvas = _c.sent();
                            if (container.width && container.height) {
                                this.ctx.drawImage(canvas, 0, 0, container.width, container.height, container.bounds.left, container.bounds.top, container.bounds.width, container.bounds.height);
                            }
                            _c.label = 14;
                        case 14:
                            if (container instanceof InputElementContainer) {
                                size = Math.min(container.bounds.width, container.bounds.height);
                                if (container.type === CHECKBOX) {
                                    if (container.checked) {
                                        this.ctx.save();
                                        this.path([
                                            new Vector(container.bounds.left + size * 0.39363, container.bounds.top + size * 0.79),
                                            new Vector(container.bounds.left + size * 0.16, container.bounds.top + size * 0.5549),
                                            new Vector(container.bounds.left + size * 0.27347, container.bounds.top + size * 0.44071),
                                            new Vector(container.bounds.left + size * 0.39694, container.bounds.top + size * 0.5649),
                                            new Vector(container.bounds.left + size * 0.72983, container.bounds.top + size * 0.23),
                                            new Vector(container.bounds.left + size * 0.84, container.bounds.top + size * 0.34085),
                                            new Vector(container.bounds.left + size * 0.39363, container.bounds.top + size * 0.79)
                                        ]);
                                        this.ctx.fillStyle = asString(INPUT_COLOR);
                                        this.ctx.fill();
                                        this.ctx.restore();
                                    }
                                }
                                else if (container.type === RADIO) {
                                    if (container.checked) {
                                        this.ctx.save();
                                        this.ctx.beginPath();
                                        this.ctx.arc(container.bounds.left + size / 2, container.bounds.top + size / 2, size / 4, 0, Math.PI * 2, true);
                                        this.ctx.fillStyle = asString(INPUT_COLOR);
                                        this.ctx.fill();
                                        this.ctx.restore();
                                    }
                                }
                            }
                            if (isTextInputElement(container) && container.value.length) {
                                _b = this.createFontStyle(styles), fontFamily = _b[0], fontSize = _b[1];
                                baseline = this.fontMetrics.getMetrics(fontFamily, fontSize).baseline;
                                this.ctx.font = fontFamily;
                                this.ctx.fillStyle = asString(styles.color);
                                this.ctx.textBaseline = 'alphabetic';
                                this.ctx.textAlign = canvasTextAlign(container.styles.textAlign);
                                bounds = contentBox(container);
                                x = 0;
                                switch (container.styles.textAlign) {
                                    case 1 /* CENTER */:
                                        x += bounds.width / 2;
                                        break;
                                    case 2 /* RIGHT */:
                                        x += bounds.width;
                                        break;
                                }
                                textBounds = bounds.add(x, 0, 0, -bounds.height / 2 + 1);
                                this.ctx.save();
                                this.path([
                                    new Vector(bounds.left, bounds.top),
                                    new Vector(bounds.left + bounds.width, bounds.top),
                                    new Vector(bounds.left + bounds.width, bounds.top + bounds.height),
                                    new Vector(bounds.left, bounds.top + bounds.height)
                                ]);
                                this.ctx.clip();
                                this.renderTextWithLetterSpacing(new TextBounds(container.value, textBounds), styles.letterSpacing, baseline);
                                this.ctx.restore();
                                this.ctx.textBaseline = 'alphabetic';
                                this.ctx.textAlign = 'left';
                            }
                            if (!contains(container.styles.display, 2048 /* LIST_ITEM */)) return [3 /*break*/, 20];
                            if (!(container.styles.listStyleImage !== null)) return [3 /*break*/, 19];
                            img = container.styles.listStyleImage;
                            if (!(img.type === 0 /* URL */)) return [3 /*break*/, 18];
                            image = void 0;
                            url = img.url;
                            _c.label = 15;
                        case 15:
                            _c.trys.push([15, 17, , 18]);
                            return [4 /*yield*/, this.context.cache.match(url)];
                        case 16:
                            image = _c.sent();
                            this.ctx.drawImage(image, container.bounds.left - (image.width + 10), container.bounds.top);
                            return [3 /*break*/, 18];
                        case 17:
                            _c.sent();
                            this.context.logger.error("Error loading list-style-image " + url);
                            return [3 /*break*/, 18];
                        case 18: return [3 /*break*/, 20];
                        case 19:
                            if (paint.listValue && container.styles.listStyleType !== -1 /* NONE */) {
                                fontFamily = this.createFontStyle(styles)[0];
                                this.ctx.font = fontFamily;
                                this.ctx.fillStyle = asString(styles.color);
                                this.ctx.textBaseline = 'middle';
                                this.ctx.textAlign = 'right';
                                bounds = new Bounds(container.bounds.left, container.bounds.top + getAbsoluteValue(container.styles.paddingTop, container.bounds.width), container.bounds.width, computeLineHeight(styles.lineHeight, styles.fontSize.number) / 2 + 1);
                                this.renderTextWithLetterSpacing(new TextBounds(paint.listValue, bounds), styles.letterSpacing, computeLineHeight(styles.lineHeight, styles.fontSize.number) / 2 + 2);
                                this.ctx.textBaseline = 'bottom';
                                this.ctx.textAlign = 'left';
                            }
                            _c.label = 20;
                        case 20: return [2 /*return*/];
                    }
                });
            });
        };
        CanvasRenderer.prototype.renderStackContent = function (stack) {
            return __awaiter(this, void 0, void 0, function () {
                var _i, _a, child, _b, _c, child, _d, _e, child, _f, _g, child, _h, _j, child, _k, _l, child, _m, _o, child;
                return __generator(this, function (_p) {
                    switch (_p.label) {
                        case 0:
                            if (contains(stack.element.container.flags, 16 /* DEBUG_RENDER */)) {
                                debugger;
                            }
                            // https://www.w3.org/TR/css-position-3/#painting-order
                            // 1. the background and borders of the element forming the stacking context.
                            return [4 /*yield*/, this.renderNodeBackgroundAndBorders(stack.element)];
                        case 1:
                            // https://www.w3.org/TR/css-position-3/#painting-order
                            // 1. the background and borders of the element forming the stacking context.
                            _p.sent();
                            _i = 0, _a = stack.negativeZIndex;
                            _p.label = 2;
                        case 2:
                            if (!(_i < _a.length)) return [3 /*break*/, 5];
                            child = _a[_i];
                            return [4 /*yield*/, this.renderStack(child)];
                        case 3:
                            _p.sent();
                            _p.label = 4;
                        case 4:
                            _i++;
                            return [3 /*break*/, 2];
                        case 5: 
                        // 3. For all its in-flow, non-positioned, block-level descendants in tree order:
                        return [4 /*yield*/, this.renderNodeContent(stack.element)];
                        case 6:
                            // 3. For all its in-flow, non-positioned, block-level descendants in tree order:
                            _p.sent();
                            _b = 0, _c = stack.nonInlineLevel;
                            _p.label = 7;
                        case 7:
                            if (!(_b < _c.length)) return [3 /*break*/, 10];
                            child = _c[_b];
                            return [4 /*yield*/, this.renderNode(child)];
                        case 8:
                            _p.sent();
                            _p.label = 9;
                        case 9:
                            _b++;
                            return [3 /*break*/, 7];
                        case 10:
                            _d = 0, _e = stack.nonPositionedFloats;
                            _p.label = 11;
                        case 11:
                            if (!(_d < _e.length)) return [3 /*break*/, 14];
                            child = _e[_d];
                            return [4 /*yield*/, this.renderStack(child)];
                        case 12:
                            _p.sent();
                            _p.label = 13;
                        case 13:
                            _d++;
                            return [3 /*break*/, 11];
                        case 14:
                            _f = 0, _g = stack.nonPositionedInlineLevel;
                            _p.label = 15;
                        case 15:
                            if (!(_f < _g.length)) return [3 /*break*/, 18];
                            child = _g[_f];
                            return [4 /*yield*/, this.renderStack(child)];
                        case 16:
                            _p.sent();
                            _p.label = 17;
                        case 17:
                            _f++;
                            return [3 /*break*/, 15];
                        case 18:
                            _h = 0, _j = stack.inlineLevel;
                            _p.label = 19;
                        case 19:
                            if (!(_h < _j.length)) return [3 /*break*/, 22];
                            child = _j[_h];
                            return [4 /*yield*/, this.renderNode(child)];
                        case 20:
                            _p.sent();
                            _p.label = 21;
                        case 21:
                            _h++;
                            return [3 /*break*/, 19];
                        case 22:
                            _k = 0, _l = stack.zeroOrAutoZIndexOrTransformedOrOpacity;
                            _p.label = 23;
                        case 23:
                            if (!(_k < _l.length)) return [3 /*break*/, 26];
                            child = _l[_k];
                            return [4 /*yield*/, this.renderStack(child)];
                        case 24:
                            _p.sent();
                            _p.label = 25;
                        case 25:
                            _k++;
                            return [3 /*break*/, 23];
                        case 26:
                            _m = 0, _o = stack.positiveZIndex;
                            _p.label = 27;
                        case 27:
                            if (!(_m < _o.length)) return [3 /*break*/, 30];
                            child = _o[_m];
                            return [4 /*yield*/, this.renderStack(child)];
                        case 28:
                            _p.sent();
                            _p.label = 29;
                        case 29:
                            _m++;
                            return [3 /*break*/, 27];
                        case 30: return [2 /*return*/];
                    }
                });
            });
        };
        CanvasRenderer.prototype.mask = function (paths) {
            this.ctx.beginPath();
            this.ctx.moveTo(0, 0);
            this.ctx.lineTo(this.canvas.width, 0);
            this.ctx.lineTo(this.canvas.width, this.canvas.height);
            this.ctx.lineTo(0, this.canvas.height);
            this.ctx.lineTo(0, 0);
            this.formatPath(paths.slice(0).reverse());
            this.ctx.closePath();
        };
        CanvasRenderer.prototype.path = function (paths) {
            this.ctx.beginPath();
            this.formatPath(paths);
            this.ctx.closePath();
        };
        CanvasRenderer.prototype.formatPath = function (paths) {
            var _this = this;
            paths.forEach(function (point, index) {
                var start = isBezierCurve(point) ? point.start : point;
                if (index === 0) {
                    _this.ctx.moveTo(start.x, start.y);
                }
                else {
                    _this.ctx.lineTo(start.x, start.y);
                }
                if (isBezierCurve(point)) {
                    _this.ctx.bezierCurveTo(point.startControl.x, point.startControl.y, point.endControl.x, point.endControl.y, point.end.x, point.end.y);
                }
            });
        };
        CanvasRenderer.prototype.renderRepeat = function (path, pattern, offsetX, offsetY) {
            this.path(path);
            this.ctx.fillStyle = pattern;
            this.ctx.translate(offsetX, offsetY);
            this.ctx.fill();
            this.ctx.translate(-offsetX, -offsetY);
        };
        CanvasRenderer.prototype.resizeImage = function (image, width, height) {
            var _a;
            if (image.width === width && image.height === height) {
                return image;
            }
            var ownerDocument = (_a = this.canvas.ownerDocument) !== null && _a !== void 0 ? _a : document;
            var canvas = ownerDocument.createElement('canvas');
            canvas.width = Math.max(1, width);
            canvas.height = Math.max(1, height);
            var ctx = canvas.getContext('2d');
            ctx.drawImage(image, 0, 0, image.width, image.height, 0, 0, width, height);
            return canvas;
        };
        CanvasRenderer.prototype.renderBackgroundImage = function (container) {
            return __awaiter(this, void 0, void 0, function () {
                var index, _loop_1, this_1, _i, _a, backgroundImage;
                return __generator(this, function (_b) {
                    switch (_b.label) {
                        case 0:
                            index = container.styles.backgroundImage.length - 1;
                            _loop_1 = function (backgroundImage) {
                                var image, url, _c, path, x, y, width, height, pattern, _d, path, x, y, width, height, _e, lineLength, x0, x1, y0, y1, canvas, ctx, gradient_1, pattern, _f, path, left, top_1, width, height, position, x, y, _g, rx, ry, radialGradient_1, midX, midY, f, invF;
                                return __generator(this, function (_h) {
                                    switch (_h.label) {
                                        case 0:
                                            if (!(backgroundImage.type === 0 /* URL */)) return [3 /*break*/, 5];
                                            image = void 0;
                                            url = backgroundImage.url;
                                            _h.label = 1;
                                        case 1:
                                            _h.trys.push([1, 3, , 4]);
                                            return [4 /*yield*/, this_1.context.cache.match(url)];
                                        case 2:
                                            image = _h.sent();
                                            return [3 /*break*/, 4];
                                        case 3:
                                            _h.sent();
                                            this_1.context.logger.error("Error loading background-image " + url);
                                            return [3 /*break*/, 4];
                                        case 4:
                                            if (image) {
                                                _c = calculateBackgroundRendering(container, index, [
                                                    image.width,
                                                    image.height,
                                                    image.width / image.height
                                                ]), path = _c[0], x = _c[1], y = _c[2], width = _c[3], height = _c[4];
                                                pattern = this_1.ctx.createPattern(this_1.resizeImage(image, width, height), 'repeat');
                                                this_1.renderRepeat(path, pattern, x, y);
                                            }
                                            return [3 /*break*/, 6];
                                        case 5:
                                            if (isLinearGradient(backgroundImage)) {
                                                _d = calculateBackgroundRendering(container, index, [null, null, null]), path = _d[0], x = _d[1], y = _d[2], width = _d[3], height = _d[4];
                                                _e = calculateGradientDirection(backgroundImage.angle, width, height), lineLength = _e[0], x0 = _e[1], x1 = _e[2], y0 = _e[3], y1 = _e[4];
                                                canvas = document.createElement('canvas');
                                                canvas.width = width;
                                                canvas.height = height;
                                                ctx = canvas.getContext('2d');
                                                gradient_1 = ctx.createLinearGradient(x0, y0, x1, y1);
                                                processColorStops(backgroundImage.stops, lineLength).forEach(function (colorStop) {
                                                    return gradient_1.addColorStop(colorStop.stop, asString(colorStop.color));
                                                });
                                                ctx.fillStyle = gradient_1;
                                                ctx.fillRect(0, 0, width, height);
                                                if (width > 0 && height > 0) {
                                                    pattern = this_1.ctx.createPattern(canvas, 'repeat');
                                                    this_1.renderRepeat(path, pattern, x, y);
                                                }
                                            }
                                            else if (isRadialGradient(backgroundImage)) {
                                                _f = calculateBackgroundRendering(container, index, [
                                                    null,
                                                    null,
                                                    null
                                                ]), path = _f[0], left = _f[1], top_1 = _f[2], width = _f[3], height = _f[4];
                                                position = backgroundImage.position.length === 0 ? [FIFTY_PERCENT] : backgroundImage.position;
                                                x = getAbsoluteValue(position[0], width);
                                                y = getAbsoluteValue(position[position.length - 1], height);
                                                _g = calculateRadius(backgroundImage, x, y, width, height), rx = _g[0], ry = _g[1];
                                                if (rx > 0 && ry > 0) {
                                                    radialGradient_1 = this_1.ctx.createRadialGradient(left + x, top_1 + y, 0, left + x, top_1 + y, rx);
                                                    processColorStops(backgroundImage.stops, rx * 2).forEach(function (colorStop) {
                                                        return radialGradient_1.addColorStop(colorStop.stop, asString(colorStop.color));
                                                    });
                                                    this_1.path(path);
                                                    this_1.ctx.fillStyle = radialGradient_1;
                                                    if (rx !== ry) {
                                                        midX = container.bounds.left + 0.5 * container.bounds.width;
                                                        midY = container.bounds.top + 0.5 * container.bounds.height;
                                                        f = ry / rx;
                                                        invF = 1 / f;
                                                        this_1.ctx.save();
                                                        this_1.ctx.translate(midX, midY);
                                                        this_1.ctx.transform(1, 0, 0, f, 0, 0);
                                                        this_1.ctx.translate(-midX, -midY);
                                                        this_1.ctx.fillRect(left, invF * (top_1 - midY) + midY, width, height * invF);
                                                        this_1.ctx.restore();
                                                    }
                                                    else {
                                                        this_1.ctx.fill();
                                                    }
                                                }
                                            }
                                            _h.label = 6;
                                        case 6:
                                            index--;
                                            return [2 /*return*/];
                                    }
                                });
                            };
                            this_1 = this;
                            _i = 0, _a = container.styles.backgroundImage.slice(0).reverse();
                            _b.label = 1;
                        case 1:
                            if (!(_i < _a.length)) return [3 /*break*/, 4];
                            backgroundImage = _a[_i];
                            return [5 /*yield**/, _loop_1(backgroundImage)];
                        case 2:
                            _b.sent();
                            _b.label = 3;
                        case 3:
                            _i++;
                            return [3 /*break*/, 1];
                        case 4: return [2 /*return*/];
                    }
                });
            });
        };
        CanvasRenderer.prototype.renderSolidBorder = function (color, side, curvePoints) {
            return __awaiter(this, void 0, void 0, function () {
                return __generator(this, function (_a) {
                    this.path(parsePathForBorder(curvePoints, side));
                    this.ctx.fillStyle = asString(color);
                    this.ctx.fill();
                    return [2 /*return*/];
                });
            });
        };
        CanvasRenderer.prototype.renderDoubleBorder = function (color, width, side, curvePoints) {
            return __awaiter(this, void 0, void 0, function () {
                var outerPaths, innerPaths;
                return __generator(this, function (_a) {
                    switch (_a.label) {
                        case 0:
                            if (!(width < 3)) return [3 /*break*/, 2];
                            return [4 /*yield*/, this.renderSolidBorder(color, side, curvePoints)];
                        case 1:
                            _a.sent();
                            return [2 /*return*/];
                        case 2:
                            outerPaths = parsePathForBorderDoubleOuter(curvePoints, side);
                            this.path(outerPaths);
                            this.ctx.fillStyle = asString(color);
                            this.ctx.fill();
                            innerPaths = parsePathForBorderDoubleInner(curvePoints, side);
                            this.path(innerPaths);
                            this.ctx.fill();
                            return [2 /*return*/];
                    }
                });
            });
        };
        CanvasRenderer.prototype.renderNodeBackgroundAndBorders = function (paint) {
            return __awaiter(this, void 0, void 0, function () {
                var styles, hasBackground, borders, backgroundPaintingArea, side, _i, borders_1, border;
                var _this = this;
                return __generator(this, function (_a) {
                    switch (_a.label) {
                        case 0:
                            this.applyEffects(paint.getEffects(2 /* BACKGROUND_BORDERS */));
                            styles = paint.container.styles;
                            hasBackground = !isTransparent(styles.backgroundColor) || styles.backgroundImage.length;
                            borders = [
                                { style: styles.borderTopStyle, color: styles.borderTopColor, width: styles.borderTopWidth },
                                { style: styles.borderRightStyle, color: styles.borderRightColor, width: styles.borderRightWidth },
                                { style: styles.borderBottomStyle, color: styles.borderBottomColor, width: styles.borderBottomWidth },
                                { style: styles.borderLeftStyle, color: styles.borderLeftColor, width: styles.borderLeftWidth }
                            ];
                            backgroundPaintingArea = calculateBackgroundCurvedPaintingArea(getBackgroundValueForIndex(styles.backgroundClip, 0), paint.curves);
                            if (!(hasBackground || styles.boxShadow.length)) return [3 /*break*/, 2];
                            this.ctx.save();
                            this.path(backgroundPaintingArea);
                            this.ctx.clip();
                            if (!isTransparent(styles.backgroundColor)) {
                                this.ctx.fillStyle = asString(styles.backgroundColor);
                                this.ctx.fill();
                            }
                            return [4 /*yield*/, this.renderBackgroundImage(paint.container)];
                        case 1:
                            _a.sent();
                            this.ctx.restore();
                            styles.boxShadow
                                .slice(0)
                                .reverse()
                                .forEach(function (shadow) {
                                _this.ctx.save();
                                var borderBoxArea = calculateBorderBoxPath(paint.curves);
                                var maskOffset = shadow.inset ? 0 : MASK_OFFSET;
                                var shadowPaintingArea = transformPath(borderBoxArea, -maskOffset + (shadow.inset ? 1 : -1) * shadow.spread.number, (shadow.inset ? 1 : -1) * shadow.spread.number, shadow.spread.number * (shadow.inset ? -2 : 2), shadow.spread.number * (shadow.inset ? -2 : 2));
                                if (shadow.inset) {
                                    _this.path(borderBoxArea);
                                    _this.ctx.clip();
                                    _this.mask(shadowPaintingArea);
                                }
                                else {
                                    _this.mask(borderBoxArea);
                                    _this.ctx.clip();
                                    _this.path(shadowPaintingArea);
                                }
                                _this.ctx.shadowOffsetX = shadow.offsetX.number + maskOffset;
                                _this.ctx.shadowOffsetY = shadow.offsetY.number;
                                _this.ctx.shadowColor = asString(shadow.color);
                                _this.ctx.shadowBlur = shadow.blur.number;
                                _this.ctx.fillStyle = shadow.inset ? asString(shadow.color) : 'rgba(0,0,0,1)';
                                _this.ctx.fill();
                                _this.ctx.restore();
                            });
                            _a.label = 2;
                        case 2:
                            side = 0;
                            _i = 0, borders_1 = borders;
                            _a.label = 3;
                        case 3:
                            if (!(_i < borders_1.length)) return [3 /*break*/, 13];
                            border = borders_1[_i];
                            if (!(border.style !== 0 /* NONE */ && !isTransparent(border.color) && border.width > 0)) return [3 /*break*/, 11];
                            if (!(border.style === 2 /* DASHED */)) return [3 /*break*/, 5];
                            return [4 /*yield*/, this.renderDashedDottedBorder(border.color, border.width, side, paint.curves, 2 /* DASHED */)];
                        case 4:
                            _a.sent();
                            return [3 /*break*/, 11];
                        case 5:
                            if (!(border.style === 3 /* DOTTED */)) return [3 /*break*/, 7];
                            return [4 /*yield*/, this.renderDashedDottedBorder(border.color, border.width, side, paint.curves, 3 /* DOTTED */)];
                        case 6:
                            _a.sent();
                            return [3 /*break*/, 11];
                        case 7:
                            if (!(border.style === 4 /* DOUBLE */)) return [3 /*break*/, 9];
                            return [4 /*yield*/, this.renderDoubleBorder(border.color, border.width, side, paint.curves)];
                        case 8:
                            _a.sent();
                            return [3 /*break*/, 11];
                        case 9: return [4 /*yield*/, this.renderSolidBorder(border.color, side, paint.curves)];
                        case 10:
                            _a.sent();
                            _a.label = 11;
                        case 11:
                            side++;
                            _a.label = 12;
                        case 12:
                            _i++;
                            return [3 /*break*/, 3];
                        case 13: return [2 /*return*/];
                    }
                });
            });
        };
        CanvasRenderer.prototype.renderDashedDottedBorder = function (color, width, side, curvePoints, style) {
            return __awaiter(this, void 0, void 0, function () {
                var strokePaths, boxPaths, startX, startY, endX, endY, length, dashLength, spaceLength, useLineDash, multiplier, numberOfDashes, minSpace, maxSpace, path1, path2, path1, path2;
                return __generator(this, function (_a) {
                    this.ctx.save();
                    strokePaths = parsePathForBorderStroke(curvePoints, side);
                    boxPaths = parsePathForBorder(curvePoints, side);
                    if (style === 2 /* DASHED */) {
                        this.path(boxPaths);
                        this.ctx.clip();
                    }
                    if (isBezierCurve(boxPaths[0])) {
                        startX = boxPaths[0].start.x;
                        startY = boxPaths[0].start.y;
                    }
                    else {
                        startX = boxPaths[0].x;
                        startY = boxPaths[0].y;
                    }
                    if (isBezierCurve(boxPaths[1])) {
                        endX = boxPaths[1].end.x;
                        endY = boxPaths[1].end.y;
                    }
                    else {
                        endX = boxPaths[1].x;
                        endY = boxPaths[1].y;
                    }
                    if (side === 0 || side === 2) {
                        length = Math.abs(startX - endX);
                    }
                    else {
                        length = Math.abs(startY - endY);
                    }
                    this.ctx.beginPath();
                    if (style === 3 /* DOTTED */) {
                        this.formatPath(strokePaths);
                    }
                    else {
                        this.formatPath(boxPaths.slice(0, 2));
                    }
                    dashLength = width < 3 ? width * 3 : width * 2;
                    spaceLength = width < 3 ? width * 2 : width;
                    if (style === 3 /* DOTTED */) {
                        dashLength = width;
                        spaceLength = width;
                    }
                    useLineDash = true;
                    if (length <= dashLength * 2) {
                        useLineDash = false;
                    }
                    else if (length <= dashLength * 2 + spaceLength) {
                        multiplier = length / (2 * dashLength + spaceLength);
                        dashLength *= multiplier;
                        spaceLength *= multiplier;
                    }
                    else {
                        numberOfDashes = Math.floor((length + spaceLength) / (dashLength + spaceLength));
                        minSpace = (length - numberOfDashes * dashLength) / (numberOfDashes - 1);
                        maxSpace = (length - (numberOfDashes + 1) * dashLength) / numberOfDashes;
                        spaceLength =
                            maxSpace <= 0 || Math.abs(spaceLength - minSpace) < Math.abs(spaceLength - maxSpace)
                                ? minSpace
                                : maxSpace;
                    }
                    if (useLineDash) {
                        if (style === 3 /* DOTTED */) {
                            this.ctx.setLineDash([0, dashLength + spaceLength]);
                        }
                        else {
                            this.ctx.setLineDash([dashLength, spaceLength]);
                        }
                    }
                    if (style === 3 /* DOTTED */) {
                        this.ctx.lineCap = 'round';
                        this.ctx.lineWidth = width;
                    }
                    else {
                        this.ctx.lineWidth = width * 2 + 1.1;
                    }
                    this.ctx.strokeStyle = asString(color);
                    this.ctx.stroke();
                    this.ctx.setLineDash([]);
                    // dashed round edge gap
                    if (style === 2 /* DASHED */) {
                        if (isBezierCurve(boxPaths[0])) {
                            path1 = boxPaths[3];
                            path2 = boxPaths[0];
                            this.ctx.beginPath();
                            this.formatPath([new Vector(path1.end.x, path1.end.y), new Vector(path2.start.x, path2.start.y)]);
                            this.ctx.stroke();
                        }
                        if (isBezierCurve(boxPaths[1])) {
                            path1 = boxPaths[1];
                            path2 = boxPaths[2];
                            this.ctx.beginPath();
                            this.formatPath([new Vector(path1.end.x, path1.end.y), new Vector(path2.start.x, path2.start.y)]);
                            this.ctx.stroke();
                        }
                    }
                    this.ctx.restore();
                    return [2 /*return*/];
                });
            });
        };
        CanvasRenderer.prototype.render = function (element) {
            return __awaiter(this, void 0, void 0, function () {
                var stack;
                return __generator(this, function (_a) {
                    switch (_a.label) {
                        case 0:
                            if (this.options.backgroundColor) {
                                this.ctx.fillStyle = asString(this.options.backgroundColor);
                                this.ctx.fillRect(this.options.x, this.options.y, this.options.width, this.options.height);
                            }
                            stack = parseStackingContexts(element);
                            return [4 /*yield*/, this.renderStack(stack)];
                        case 1:
                            _a.sent();
                            this.applyEffects([]);
                            return [2 /*return*/, this.canvas];
                    }
                });
            });
        };
        return CanvasRenderer;
    }(Renderer));
    var isTextInputElement = function (container) {
        if (container instanceof TextareaElementContainer) {
            return true;
        }
        else if (container instanceof SelectElementContainer) {
            return true;
        }
        else if (container instanceof InputElementContainer && container.type !== RADIO && container.type !== CHECKBOX) {
            return true;
        }
        return false;
    };
    var calculateBackgroundCurvedPaintingArea = function (clip, curves) {
        switch (clip) {
            case 0 /* BORDER_BOX */:
                return calculateBorderBoxPath(curves);
            case 2 /* CONTENT_BOX */:
                return calculateContentBoxPath(curves);
            case 1 /* PADDING_BOX */:
            default:
                return calculatePaddingBoxPath(curves);
        }
    };
    var canvasTextAlign = function (textAlign) {
        switch (textAlign) {
            case 1 /* CENTER */:
                return 'center';
            case 2 /* RIGHT */:
                return 'right';
            case 0 /* LEFT */:
            default:
                return 'left';
        }
    };
    // see https://github.com/niklasvh/html2canvas/pull/2645
    var iOSBrokenFonts = ['-apple-system', 'system-ui'];
    var fixIOSSystemFonts = function (fontFamilies) {
        return /iPhone OS 15_(0|1)/.test(window.navigator.userAgent)
            ? fontFamilies.filter(function (fontFamily) { return iOSBrokenFonts.indexOf(fontFamily) === -1; })
            : fontFamilies;
    };

    var ForeignObjectRenderer = /** @class */ (function (_super) {
        __extends(ForeignObjectRenderer, _super);
        function ForeignObjectRenderer(context, options) {
            var _this = _super.call(this, context, options) || this;
            _this.canvas = options.canvas ? options.canvas : document.createElement('canvas');
            _this.ctx = _this.canvas.getContext('2d');
            _this.options = options;
            _this.canvas.width = Math.floor(options.width * options.scale);
            _this.canvas.height = Math.floor(options.height * options.scale);
            _this.canvas.style.width = options.width + "px";
            _this.canvas.style.height = options.height + "px";
            _this.ctx.scale(_this.options.scale, _this.options.scale);
            _this.ctx.translate(-options.x, -options.y);
            _this.context.logger.debug("EXPERIMENTAL ForeignObject renderer initialized (" + options.width + "x" + options.height + " at " + options.x + "," + options.y + ") with scale " + options.scale);
            return _this;
        }
        ForeignObjectRenderer.prototype.render = function (element) {
            return __awaiter(this, void 0, void 0, function () {
                var svg, img;
                return __generator(this, function (_a) {
                    switch (_a.label) {
                        case 0:
                            svg = createForeignObjectSVG(this.options.width * this.options.scale, this.options.height * this.options.scale, this.options.scale, this.options.scale, element);
                            return [4 /*yield*/, loadSerializedSVG(svg)];
                        case 1:
                            img = _a.sent();
                            if (this.options.backgroundColor) {
                                this.ctx.fillStyle = asString(this.options.backgroundColor);
                                this.ctx.fillRect(0, 0, this.options.width * this.options.scale, this.options.height * this.options.scale);
                            }
                            this.ctx.drawImage(img, -this.options.x * this.options.scale, -this.options.y * this.options.scale);
                            return [2 /*return*/, this.canvas];
                    }
                });
            });
        };
        return ForeignObjectRenderer;
    }(Renderer));
    var loadSerializedSVG = function (svg) {
        return new Promise(function (resolve, reject) {
            var img = new Image();
            img.onload = function () {
                resolve(img);
            };
            img.onerror = reject;
            img.src = "data:image/svg+xml;charset=utf-8," + encodeURIComponent(new XMLSerializer().serializeToString(svg));
        });
    };

    var Logger = /** @class */ (function () {
        function Logger(_a) {
            var id = _a.id, enabled = _a.enabled;
            this.id = id;
            this.enabled = enabled;
            this.start = Date.now();
        }
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        Logger.prototype.debug = function () {
            var args = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                args[_i] = arguments[_i];
            }
            if (this.enabled) {
                // eslint-disable-next-line no-console
                if (typeof window !== 'undefined' && window.console && typeof console.debug === 'function') {
                    // eslint-disable-next-line no-console
                    console.debug.apply(console, __spreadArray([this.id, this.getTime() + "ms"], args));
                }
                else {
                    this.info.apply(this, args);
                }
            }
        };
        Logger.prototype.getTime = function () {
            return Date.now() - this.start;
        };
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        Logger.prototype.info = function () {
            var args = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                args[_i] = arguments[_i];
            }
            if (this.enabled) {
                // eslint-disable-next-line no-console
                if (typeof window !== 'undefined' && window.console && typeof console.info === 'function') {
                    // eslint-disable-next-line no-console
                    console.info.apply(console, __spreadArray([this.id, this.getTime() + "ms"], args));
                }
            }
        };
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        Logger.prototype.warn = function () {
            var args = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                args[_i] = arguments[_i];
            }
            if (this.enabled) {
                // eslint-disable-next-line no-console
                if (typeof window !== 'undefined' && window.console && typeof console.warn === 'function') {
                    // eslint-disable-next-line no-console
                    console.warn.apply(console, __spreadArray([this.id, this.getTime() + "ms"], args));
                }
                else {
                    this.info.apply(this, args);
                }
            }
        };
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        Logger.prototype.error = function () {
            var args = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                args[_i] = arguments[_i];
            }
            if (this.enabled) {
                // eslint-disable-next-line no-console
                if (typeof window !== 'undefined' && window.console && typeof console.error === 'function') {
                    // eslint-disable-next-line no-console
                    console.error.apply(console, __spreadArray([this.id, this.getTime() + "ms"], args));
                }
                else {
                    this.info.apply(this, args);
                }
            }
        };
        Logger.instances = {};
        return Logger;
    }());

    var Context = /** @class */ (function () {
        function Context(options, windowBounds) {
            var _a;
            this.windowBounds = windowBounds;
            this.instanceName = "#" + Context.instanceCount++;
            this.logger = new Logger({ id: this.instanceName, enabled: options.logging });
            this.cache = (_a = options.cache) !== null && _a !== void 0 ? _a : new Cache(this, options);
        }
        Context.instanceCount = 1;
        return Context;
    }());

    var html2canvas = function (element, options) {
        if (options === void 0) { options = {}; }
        return renderElement(element, options);
    };
    if (typeof window !== 'undefined') {
        CacheStorage.setContext(window);
    }
    var renderElement = function (element, opts) { return __awaiter(void 0, void 0, void 0, function () {
        var ownerDocument, defaultView, resourceOptions, contextOptions, windowOptions, windowBounds, context, foreignObjectRendering, cloneOptions, documentCloner, clonedElement, container, _a, width, height, left, top, backgroundColor, renderOptions, canvas, renderer, root, renderer;
        var _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q, _r, _s, _t;
        return __generator(this, function (_u) {
            switch (_u.label) {
                case 0:
                    if (!element || typeof element !== 'object') {
                        return [2 /*return*/, Promise.reject('Invalid element provided as first argument')];
                    }
                    ownerDocument = element.ownerDocument;
                    if (!ownerDocument) {
                        throw new Error("Element is not attached to a Document");
                    }
                    defaultView = ownerDocument.defaultView;
                    if (!defaultView) {
                        throw new Error("Document is not attached to a Window");
                    }
                    resourceOptions = {
                        allowTaint: (_b = opts.allowTaint) !== null && _b !== void 0 ? _b : false,
                        imageTimeout: (_c = opts.imageTimeout) !== null && _c !== void 0 ? _c : 15000,
                        proxy: opts.proxy,
                        useCORS: (_d = opts.useCORS) !== null && _d !== void 0 ? _d : false
                    };
                    contextOptions = __assign({ logging: (_e = opts.logging) !== null && _e !== void 0 ? _e : true, cache: opts.cache }, resourceOptions);
                    windowOptions = {
                        windowWidth: (_f = opts.windowWidth) !== null && _f !== void 0 ? _f : defaultView.innerWidth,
                        windowHeight: (_g = opts.windowHeight) !== null && _g !== void 0 ? _g : defaultView.innerHeight,
                        scrollX: (_h = opts.scrollX) !== null && _h !== void 0 ? _h : defaultView.pageXOffset,
                        scrollY: (_j = opts.scrollY) !== null && _j !== void 0 ? _j : defaultView.pageYOffset
                    };
                    windowBounds = new Bounds(windowOptions.scrollX, windowOptions.scrollY, windowOptions.windowWidth, windowOptions.windowHeight);
                    context = new Context(contextOptions, windowBounds);
                    foreignObjectRendering = (_k = opts.foreignObjectRendering) !== null && _k !== void 0 ? _k : false;
                    cloneOptions = {
                        allowTaint: (_l = opts.allowTaint) !== null && _l !== void 0 ? _l : false,
                        onclone: opts.onclone,
                        ignoreElements: opts.ignoreElements,
                        inlineImages: foreignObjectRendering,
                        copyStyles: foreignObjectRendering
                    };
                    context.logger.debug("Starting document clone with size " + windowBounds.width + "x" + windowBounds.height + " scrolled to " + -windowBounds.left + "," + -windowBounds.top);
                    documentCloner = new DocumentCloner(context, element, cloneOptions);
                    clonedElement = documentCloner.clonedReferenceElement;
                    if (!clonedElement) {
                        return [2 /*return*/, Promise.reject("Unable to find element in cloned iframe")];
                    }
                    return [4 /*yield*/, documentCloner.toIFrame(ownerDocument, windowBounds)];
                case 1:
                    container = _u.sent();
                    _a = isBodyElement(clonedElement) || isHTMLElement(clonedElement)
                        ? parseDocumentSize(clonedElement.ownerDocument)
                        : parseBounds(context, clonedElement), width = _a.width, height = _a.height, left = _a.left, top = _a.top;
                    backgroundColor = parseBackgroundColor(context, clonedElement, opts.backgroundColor);
                    renderOptions = {
                        canvas: opts.canvas,
                        backgroundColor: backgroundColor,
                        scale: (_o = (_m = opts.scale) !== null && _m !== void 0 ? _m : defaultView.devicePixelRatio) !== null && _o !== void 0 ? _o : 1,
                        x: ((_p = opts.x) !== null && _p !== void 0 ? _p : 0) + left,
                        y: ((_q = opts.y) !== null && _q !== void 0 ? _q : 0) + top,
                        width: (_r = opts.width) !== null && _r !== void 0 ? _r : Math.ceil(width),
                        height: (_s = opts.height) !== null && _s !== void 0 ? _s : Math.ceil(height)
                    };
                    if (!foreignObjectRendering) return [3 /*break*/, 3];
                    context.logger.debug("Document cloned, using foreign object rendering");
                    renderer = new ForeignObjectRenderer(context, renderOptions);
                    return [4 /*yield*/, renderer.render(clonedElement)];
                case 2:
                    canvas = _u.sent();
                    return [3 /*break*/, 5];
                case 3:
                    context.logger.debug("Document cloned, element located at " + left + "," + top + " with size " + width + "x" + height + " using computed rendering");
                    context.logger.debug("Starting DOM parsing");
                    root = parseTree(context, clonedElement);
                    if (backgroundColor === root.styles.backgroundColor) {
                        root.styles.backgroundColor = COLORS.TRANSPARENT;
                    }
                    context.logger.debug("Starting renderer for element at " + renderOptions.x + "," + renderOptions.y + " with size " + renderOptions.width + "x" + renderOptions.height);
                    renderer = new CanvasRenderer(context, renderOptions);
                    return [4 /*yield*/, renderer.render(root)];
                case 4:
                    canvas = _u.sent();
                    _u.label = 5;
                case 5:
                    if ((_t = opts.removeContainer) !== null && _t !== void 0 ? _t : true) {
                        if (!DocumentCloner.destroy(container)) {
                            context.logger.error("Cannot detach cloned iframe as it is not in the DOM anymore");
                        }
                    }
                    context.logger.debug("Finished rendering");
                    return [2 /*return*/, canvas];
            }
        });
    }); };
    var parseBackgroundColor = function (context, element, backgroundColorOverride) {
        var ownerDocument = element.ownerDocument;
        // http://www.w3.org/TR/css3-background/#special-backgrounds
        var documentBackgroundColor = ownerDocument.documentElement
            ? parseColor(context, getComputedStyle(ownerDocument.documentElement).backgroundColor)
            : COLORS.TRANSPARENT;
        var bodyBackgroundColor = ownerDocument.body
            ? parseColor(context, getComputedStyle(ownerDocument.body).backgroundColor)
            : COLORS.TRANSPARENT;
        var defaultBackgroundColor = typeof backgroundColorOverride === 'string'
            ? parseColor(context, backgroundColorOverride)
            : backgroundColorOverride === null
                ? COLORS.TRANSPARENT
                : 0xffffffff;
        return element === ownerDocument.documentElement
            ? isTransparent(documentBackgroundColor)
                ? isTransparent(bodyBackgroundColor)
                    ? defaultBackgroundColor
                    : bodyBackgroundColor
                : documentBackgroundColor
            : defaultBackgroundColor;
    };

    return html2canvas;

})));
//# sourceMappingURL=html2canvas.js.map


/***/ }),

/***/ 9600:
/***/ ((module) => {

"use strict";


function hasKey(obj, keys) {
	var o = obj;
	keys.slice(0, -1).forEach(function (key) {
		o = o[key] || {};
	});

	var key = keys[keys.length - 1];
	return key in o;
}

function isNumber(x) {
	if (typeof x === 'number') { return true; }
	if ((/^0x[0-9a-f]+$/i).test(x)) { return true; }
	return (/^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/).test(x);
}

function isConstructorOrProto(obj, key) {
	return (key === 'constructor' && typeof obj[key] === 'function') || key === '__proto__';
}

module.exports = function (args, opts) {
	if (!opts) { opts = {}; }

	var flags = {
		bools: {},
		strings: {},
		unknownFn: null,
	};

	if (typeof opts.unknown === 'function') {
		flags.unknownFn = opts.unknown;
	}

	if (typeof opts.boolean === 'boolean' && opts.boolean) {
		flags.allBools = true;
	} else {
		[].concat(opts.boolean).filter(Boolean).forEach(function (key) {
			flags.bools[key] = true;
		});
	}

	var aliases = {};

	function aliasIsBoolean(key) {
		return aliases[key].some(function (x) {
			return flags.bools[x];
		});
	}

	Object.keys(opts.alias || {}).forEach(function (key) {
		aliases[key] = [].concat(opts.alias[key]);
		aliases[key].forEach(function (x) {
			aliases[x] = [key].concat(aliases[key].filter(function (y) {
				return x !== y;
			}));
		});
	});

	[].concat(opts.string).filter(Boolean).forEach(function (key) {
		flags.strings[key] = true;
		if (aliases[key]) {
			[].concat(aliases[key]).forEach(function (k) {
				flags.strings[k] = true;
			});
		}
	});

	var defaults = opts.default || {};

	var argv = { _: [] };

	function argDefined(key, arg) {
		return (flags.allBools && (/^--[^=]+$/).test(arg))
			|| flags.strings[key]
			|| flags.bools[key]
			|| aliases[key];
	}

	function setKey(obj, keys, value) {
		var o = obj;
		for (var i = 0; i < keys.length - 1; i++) {
			var key = keys[i];
			if (isConstructorOrProto(o, key)) { return; }
			if (o[key] === undefined) { o[key] = {}; }
			if (
				o[key] === Object.prototype
				|| o[key] === Number.prototype
				|| o[key] === String.prototype
			) {
				o[key] = {};
			}
			if (o[key] === Array.prototype) { o[key] = []; }
			o = o[key];
		}

		var lastKey = keys[keys.length - 1];
		if (isConstructorOrProto(o, lastKey)) { return; }
		if (
			o === Object.prototype
			|| o === Number.prototype
			|| o === String.prototype
		) {
			o = {};
		}
		if (o === Array.prototype) { o = []; }
		if (o[lastKey] === undefined || flags.bools[lastKey] || typeof o[lastKey] === 'boolean') {
			o[lastKey] = value;
		} else if (Array.isArray(o[lastKey])) {
			o[lastKey].push(value);
		} else {
			o[lastKey] = [o[lastKey], value];
		}
	}

	function setArg(key, val, arg) {
		if (arg && flags.unknownFn && !argDefined(key, arg)) {
			if (flags.unknownFn(arg) === false) { return; }
		}

		var value = !flags.strings[key] && isNumber(val)
			? Number(val)
			: val;
		setKey(argv, key.split('.'), value);

		(aliases[key] || []).forEach(function (x) {
			setKey(argv, x.split('.'), value);
		});
	}

	Object.keys(flags.bools).forEach(function (key) {
		setArg(key, defaults[key] === undefined ? false : defaults[key]);
	});

	var notFlags = [];

	if (args.indexOf('--') !== -1) {
		notFlags = args.slice(args.indexOf('--') + 1);
		args = args.slice(0, args.indexOf('--'));
	}

	for (var i = 0; i < args.length; i++) {
		var arg = args[i];
		var key;
		var next;

		if ((/^--.+=/).test(arg)) {
			// Using [\s\S] instead of . because js doesn't support the
			// 'dotall' regex modifier. See:
			// http://stackoverflow.com/a/1068308/13216
			var m = arg.match(/^--([^=]+)=([\s\S]*)$/);
			key = m[1];
			var value = m[2];
			if (flags.bools[key]) {
				value = value !== 'false';
			}
			setArg(key, value, arg);
		} else if ((/^--no-.+/).test(arg)) {
			key = arg.match(/^--no-(.+)/)[1];
			setArg(key, false, arg);
		} else if ((/^--.+/).test(arg)) {
			key = arg.match(/^--(.+)/)[1];
			next = args[i + 1];
			if (
				next !== undefined
				&& !(/^(-|--)[^-]/).test(next)
				&& !flags.bools[key]
				&& !flags.allBools
				&& (aliases[key] ? !aliasIsBoolean(key) : true)
			) {
				setArg(key, next, arg);
				i += 1;
			} else if ((/^(true|false)$/).test(next)) {
				setArg(key, next === 'true', arg);
				i += 1;
			} else {
				setArg(key, flags.strings[key] ? '' : true, arg);
			}
		} else if ((/^-[^-]+/).test(arg)) {
			var letters = arg.slice(1, -1).split('');

			var broken = false;
			for (var j = 0; j < letters.length; j++) {
				next = arg.slice(j + 2);

				if (next === '-') {
					setArg(letters[j], next, arg);
					continue;
				}

				if ((/[A-Za-z]/).test(letters[j]) && next[0] === '=') {
					setArg(letters[j], next.slice(1), arg);
					broken = true;
					break;
				}

				if (
					(/[A-Za-z]/).test(letters[j])
					&& (/-?\d+(\.\d*)?(e-?\d+)?$/).test(next)
				) {
					setArg(letters[j], next, arg);
					broken = true;
					break;
				}

				if (letters[j + 1] && letters[j + 1].match(/\W/)) {
					setArg(letters[j], arg.slice(j + 2), arg);
					broken = true;
					break;
				} else {
					setArg(letters[j], flags.strings[letters[j]] ? '' : true, arg);
				}
			}

			key = arg.slice(-1)[0];
			if (!broken && key !== '-') {
				if (
					args[i + 1]
					&& !(/^(-|--)[^-]/).test(args[i + 1])
					&& !flags.bools[key]
					&& (aliases[key] ? !aliasIsBoolean(key) : true)
				) {
					setArg(key, args[i + 1], arg);
					i += 1;
				} else if (args[i + 1] && (/^(true|false)$/).test(args[i + 1])) {
					setArg(key, args[i + 1] === 'true', arg);
					i += 1;
				} else {
					setArg(key, flags.strings[key] ? '' : true, arg);
				}
			}
		} else {
			if (!flags.unknownFn || flags.unknownFn(arg) !== false) {
				argv._.push(flags.strings._ || !isNumber(arg) ? arg : Number(arg));
			}
			if (opts.stopEarly) {
				argv._.push.apply(argv._, args.slice(i + 1));
				break;
			}
		}
	}

	Object.keys(defaults).forEach(function (k) {
		if (!hasKey(argv, k.split('.'))) {
			setKey(argv, k.split('.'), defaults[k]);

			(aliases[k] || []).forEach(function (x) {
				setKey(argv, x.split('.'), defaults[k]);
			});
		}
	});

	if (opts['--']) {
		argv['--'] = notFlags.slice();
	} else {
		notFlags.forEach(function (k) {
			argv._.push(k);
		});
	}

	return argv;
};


/***/ }),

/***/ 9942:
/***/ ((module) => {

"use strict";
// 'path' module extracted from Node.js v8.11.1 (only the posix part)
// transplited with Babel

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.



function assertPath(path) {
  if (typeof path !== 'string') {
    throw new TypeError('Path must be a string. Received ' + JSON.stringify(path));
  }
}

// Resolves . and .. elements in a path with directory names
function normalizeStringPosix(path, allowAboveRoot) {
  var res = '';
  var lastSegmentLength = 0;
  var lastSlash = -1;
  var dots = 0;
  var code;
  for (var i = 0; i <= path.length; ++i) {
    if (i < path.length)
      code = path.charCodeAt(i);
    else if (code === 47 /*/*/)
      break;
    else
      code = 47 /*/*/;
    if (code === 47 /*/*/) {
      if (lastSlash === i - 1 || dots === 1) {
        // NOOP
      } else if (lastSlash !== i - 1 && dots === 2) {
        if (res.length < 2 || lastSegmentLength !== 2 || res.charCodeAt(res.length - 1) !== 46 /*.*/ || res.charCodeAt(res.length - 2) !== 46 /*.*/) {
          if (res.length > 2) {
            var lastSlashIndex = res.lastIndexOf('/');
            if (lastSlashIndex !== res.length - 1) {
              if (lastSlashIndex === -1) {
                res = '';
                lastSegmentLength = 0;
              } else {
                res = res.slice(0, lastSlashIndex);
                lastSegmentLength = res.length - 1 - res.lastIndexOf('/');
              }
              lastSlash = i;
              dots = 0;
              continue;
            }
          } else if (res.length === 2 || res.length === 1) {
            res = '';
            lastSegmentLength = 0;
            lastSlash = i;
            dots = 0;
            continue;
          }
        }
        if (allowAboveRoot) {
          if (res.length > 0)
            res += '/..';
          else
            res = '..';
          lastSegmentLength = 2;
        }
      } else {
        if (res.length > 0)
          res += '/' + path.slice(lastSlash + 1, i);
        else
          res = path.slice(lastSlash + 1, i);
        lastSegmentLength = i - lastSlash - 1;
      }
      lastSlash = i;
      dots = 0;
    } else if (code === 46 /*.*/ && dots !== -1) {
      ++dots;
    } else {
      dots = -1;
    }
  }
  return res;
}

function _format(sep, pathObject) {
  var dir = pathObject.dir || pathObject.root;
  var base = pathObject.base || (pathObject.name || '') + (pathObject.ext || '');
  if (!dir) {
    return base;
  }
  if (dir === pathObject.root) {
    return dir + base;
  }
  return dir + sep + base;
}

var posix = {
  // path.resolve([from ...], to)
  resolve: function resolve() {
    var resolvedPath = '';
    var resolvedAbsolute = false;
    var cwd;

    for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
      var path;
      if (i >= 0)
        path = arguments[i];
      else {
        if (cwd === undefined)
          cwd = process.cwd();
        path = cwd;
      }

      assertPath(path);

      // Skip empty entries
      if (path.length === 0) {
        continue;
      }

      resolvedPath = path + '/' + resolvedPath;
      resolvedAbsolute = path.charCodeAt(0) === 47 /*/*/;
    }

    // At this point the path should be resolved to a full absolute path, but
    // handle relative paths to be safe (might happen when process.cwd() fails)

    // Normalize the path
    resolvedPath = normalizeStringPosix(resolvedPath, !resolvedAbsolute);

    if (resolvedAbsolute) {
      if (resolvedPath.length > 0)
        return '/' + resolvedPath;
      else
        return '/';
    } else if (resolvedPath.length > 0) {
      return resolvedPath;
    } else {
      return '.';
    }
  },

  normalize: function normalize(path) {
    assertPath(path);

    if (path.length === 0) return '.';

    var isAbsolute = path.charCodeAt(0) === 47 /*/*/;
    var trailingSeparator = path.charCodeAt(path.length - 1) === 47 /*/*/;

    // Normalize the path
    path = normalizeStringPosix(path, !isAbsolute);

    if (path.length === 0 && !isAbsolute) path = '.';
    if (path.length > 0 && trailingSeparator) path += '/';

    if (isAbsolute) return '/' + path;
    return path;
  },

  isAbsolute: function isAbsolute(path) {
    assertPath(path);
    return path.length > 0 && path.charCodeAt(0) === 47 /*/*/;
  },

  join: function join() {
    if (arguments.length === 0)
      return '.';
    var joined;
    for (var i = 0; i < arguments.length; ++i) {
      var arg = arguments[i];
      assertPath(arg);
      if (arg.length > 0) {
        if (joined === undefined)
          joined = arg;
        else
          joined += '/' + arg;
      }
    }
    if (joined === undefined)
      return '.';
    return posix.normalize(joined);
  },

  relative: function relative(from, to) {
    assertPath(from);
    assertPath(to);

    if (from === to) return '';

    from = posix.resolve(from);
    to = posix.resolve(to);

    if (from === to) return '';

    // Trim any leading backslashes
    var fromStart = 1;
    for (; fromStart < from.length; ++fromStart) {
      if (from.charCodeAt(fromStart) !== 47 /*/*/)
        break;
    }
    var fromEnd = from.length;
    var fromLen = fromEnd - fromStart;

    // Trim any leading backslashes
    var toStart = 1;
    for (; toStart < to.length; ++toStart) {
      if (to.charCodeAt(toStart) !== 47 /*/*/)
        break;
    }
    var toEnd = to.length;
    var toLen = toEnd - toStart;

    // Compare paths to find the longest common path from root
    var length = fromLen < toLen ? fromLen : toLen;
    var lastCommonSep = -1;
    var i = 0;
    for (; i <= length; ++i) {
      if (i === length) {
        if (toLen > length) {
          if (to.charCodeAt(toStart + i) === 47 /*/*/) {
            // We get here if `from` is the exact base path for `to`.
            // For example: from='/foo/bar'; to='/foo/bar/baz'
            return to.slice(toStart + i + 1);
          } else if (i === 0) {
            // We get here if `from` is the root
            // For example: from='/'; to='/foo'
            return to.slice(toStart + i);
          }
        } else if (fromLen > length) {
          if (from.charCodeAt(fromStart + i) === 47 /*/*/) {
            // We get here if `to` is the exact base path for `from`.
            // For example: from='/foo/bar/baz'; to='/foo/bar'
            lastCommonSep = i;
          } else if (i === 0) {
            // We get here if `to` is the root.
            // For example: from='/foo'; to='/'
            lastCommonSep = 0;
          }
        }
        break;
      }
      var fromCode = from.charCodeAt(fromStart + i);
      var toCode = to.charCodeAt(toStart + i);
      if (fromCode !== toCode)
        break;
      else if (fromCode === 47 /*/*/)
        lastCommonSep = i;
    }

    var out = '';
    // Generate the relative path based on the path difference between `to`
    // and `from`
    for (i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i) {
      if (i === fromEnd || from.charCodeAt(i) === 47 /*/*/) {
        if (out.length === 0)
          out += '..';
        else
          out += '/..';
      }
    }

    // Lastly, append the rest of the destination (`to`) path that comes after
    // the common path parts
    if (out.length > 0)
      return out + to.slice(toStart + lastCommonSep);
    else {
      toStart += lastCommonSep;
      if (to.charCodeAt(toStart) === 47 /*/*/)
        ++toStart;
      return to.slice(toStart);
    }
  },

  _makeLong: function _makeLong(path) {
    return path;
  },

  dirname: function dirname(path) {
    assertPath(path);
    if (path.length === 0) return '.';
    var code = path.charCodeAt(0);
    var hasRoot = code === 47 /*/*/;
    var end = -1;
    var matchedSlash = true;
    for (var i = path.length - 1; i >= 1; --i) {
      code = path.charCodeAt(i);
      if (code === 47 /*/*/) {
          if (!matchedSlash) {
            end = i;
            break;
          }
        } else {
        // We saw the first non-path separator
        matchedSlash = false;
      }
    }

    if (end === -1) return hasRoot ? '/' : '.';
    if (hasRoot && end === 1) return '//';
    return path.slice(0, end);
  },

  basename: function basename(path, ext) {
    if (ext !== undefined && typeof ext !== 'string') throw new TypeError('"ext" argument must be a string');
    assertPath(path);

    var start = 0;
    var end = -1;
    var matchedSlash = true;
    var i;

    if (ext !== undefined && ext.length > 0 && ext.length <= path.length) {
      if (ext.length === path.length && ext === path) return '';
      var extIdx = ext.length - 1;
      var firstNonSlashEnd = -1;
      for (i = path.length - 1; i >= 0; --i) {
        var code = path.charCodeAt(i);
        if (code === 47 /*/*/) {
            // If we reached a path separator that was not part of a set of path
            // separators at the end of the string, stop now
            if (!matchedSlash) {
              start = i + 1;
              break;
            }
          } else {
          if (firstNonSlashEnd === -1) {
            // We saw the first non-path separator, remember this index in case
            // we need it if the extension ends up not matching
            matchedSlash = false;
            firstNonSlashEnd = i + 1;
          }
          if (extIdx >= 0) {
            // Try to match the explicit extension
            if (code === ext.charCodeAt(extIdx)) {
              if (--extIdx === -1) {
                // We matched the extension, so mark this as the end of our path
                // component
                end = i;
              }
            } else {
              // Extension does not match, so our result is the entire path
              // component
              extIdx = -1;
              end = firstNonSlashEnd;
            }
          }
        }
      }

      if (start === end) end = firstNonSlashEnd;else if (end === -1) end = path.length;
      return path.slice(start, end);
    } else {
      for (i = path.length - 1; i >= 0; --i) {
        if (path.charCodeAt(i) === 47 /*/*/) {
            // If we reached a path separator that was not part of a set of path
            // separators at the end of the string, stop now
            if (!matchedSlash) {
              start = i + 1;
              break;
            }
          } else if (end === -1) {
          // We saw the first non-path separator, mark this as the end of our
          // path component
          matchedSlash = false;
          end = i + 1;
        }
      }

      if (end === -1) return '';
      return path.slice(start, end);
    }
  },

  extname: function extname(path) {
    assertPath(path);
    var startDot = -1;
    var startPart = 0;
    var end = -1;
    var matchedSlash = true;
    // Track the state of characters (if any) we see before our first dot and
    // after any path separator we find
    var preDotState = 0;
    for (var i = path.length - 1; i >= 0; --i) {
      var code = path.charCodeAt(i);
      if (code === 47 /*/*/) {
          // If we reached a path separator that was not part of a set of path
          // separators at the end of the string, stop now
          if (!matchedSlash) {
            startPart = i + 1;
            break;
          }
          continue;
        }
      if (end === -1) {
        // We saw the first non-path separator, mark this as the end of our
        // extension
        matchedSlash = false;
        end = i + 1;
      }
      if (code === 46 /*.*/) {
          // If this is our first dot, mark it as the start of our extension
          if (startDot === -1)
            startDot = i;
          else if (preDotState !== 1)
            preDotState = 1;
      } else if (startDot !== -1) {
        // We saw a non-dot and non-path separator before our dot, so we should
        // have a good chance at having a non-empty extension
        preDotState = -1;
      }
    }

    if (startDot === -1 || end === -1 ||
        // We saw a non-dot character immediately before the dot
        preDotState === 0 ||
        // The (right-most) trimmed path component is exactly '..'
        preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
      return '';
    }
    return path.slice(startDot, end);
  },

  format: function format(pathObject) {
    if (pathObject === null || typeof pathObject !== 'object') {
      throw new TypeError('The "pathObject" argument must be of type Object. Received type ' + typeof pathObject);
    }
    return _format('/', pathObject);
  },

  parse: function parse(path) {
    assertPath(path);

    var ret = { root: '', dir: '', base: '', ext: '', name: '' };
    if (path.length === 0) return ret;
    var code = path.charCodeAt(0);
    var isAbsolute = code === 47 /*/*/;
    var start;
    if (isAbsolute) {
      ret.root = '/';
      start = 1;
    } else {
      start = 0;
    }
    var startDot = -1;
    var startPart = 0;
    var end = -1;
    var matchedSlash = true;
    var i = path.length - 1;

    // Track the state of characters (if any) we see before our first dot and
    // after any path separator we find
    var preDotState = 0;

    // Get non-dir info
    for (; i >= start; --i) {
      code = path.charCodeAt(i);
      if (code === 47 /*/*/) {
          // If we reached a path separator that was not part of a set of path
          // separators at the end of the string, stop now
          if (!matchedSlash) {
            startPart = i + 1;
            break;
          }
          continue;
        }
      if (end === -1) {
        // We saw the first non-path separator, mark this as the end of our
        // extension
        matchedSlash = false;
        end = i + 1;
      }
      if (code === 46 /*.*/) {
          // If this is our first dot, mark it as the start of our extension
          if (startDot === -1) startDot = i;else if (preDotState !== 1) preDotState = 1;
        } else if (startDot !== -1) {
        // We saw a non-dot and non-path separator before our dot, so we should
        // have a good chance at having a non-empty extension
        preDotState = -1;
      }
    }

    if (startDot === -1 || end === -1 ||
    // We saw a non-dot character immediately before the dot
    preDotState === 0 ||
    // The (right-most) trimmed path component is exactly '..'
    preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
      if (end !== -1) {
        if (startPart === 0 && isAbsolute) ret.base = ret.name = path.slice(1, end);else ret.base = ret.name = path.slice(startPart, end);
      }
    } else {
      if (startPart === 0 && isAbsolute) {
        ret.name = path.slice(1, startDot);
        ret.base = path.slice(1, end);
      } else {
        ret.name = path.slice(startPart, startDot);
        ret.base = path.slice(startPart, end);
      }
      ret.ext = path.slice(startDot, end);
    }

    if (startPart > 0) ret.dir = path.slice(0, startPart - 1);else if (isAbsolute) ret.dir = '/';

    return ret;
  },

  sep: '/',
  delimiter: ':',
  win32: null,
  posix: null
};

posix.posix = posix;

module.exports = posix;


/***/ }),

/***/ 1359:
/***/ ((__unused_webpack_module, exports) => {

"use strict";


var has = Object.prototype.hasOwnProperty
  , undef;

/**
 * Decode a URI encoded string.
 *
 * @param {String} input The URI encoded string.
 * @returns {String|Null} The decoded string.
 * @api private
 */
function decode(input) {
  try {
    return decodeURIComponent(input.replace(/\+/g, ' '));
  } catch (e) {
    return null;
  }
}

/**
 * Attempts to encode a given input.
 *
 * @param {String} input The string that needs to be encoded.
 * @returns {String|Null} The encoded string.
 * @api private
 */
function encode(input) {
  try {
    return encodeURIComponent(input);
  } catch (e) {
    return null;
  }
}

/**
 * Simple query string parser.
 *
 * @param {String} query The query string that needs to be parsed.
 * @returns {Object}
 * @api public
 */
function querystring(query) {
  var parser = /([^=?#&]+)=?([^&]*)/g
    , result = {}
    , part;

  while (part = parser.exec(query)) {
    var key = decode(part[1])
      , value = decode(part[2]);

    //
    // Prevent overriding of existing properties. This ensures that build-in
    // methods like `toString` or __proto__ are not overriden by malicious
    // querystrings.
    //
    // In the case if failed decoding, we want to omit the key/value pairs
    // from the result.
    //
    if (key === null || value === null || key in result) continue;
    result[key] = value;
  }

  return result;
}

/**
 * Transform a query string to an object.
 *
 * @param {Object} obj Object that should be transformed.
 * @param {String} prefix Optional prefix.
 * @returns {String}
 * @api public
 */
function querystringify(obj, prefix) {
  prefix = prefix || '';

  var pairs = []
    , value
    , key;

  //
  // Optionally prefix with a '?' if needed
  //
  if ('string' !== typeof prefix) prefix = '?';

  for (key in obj) {
    if (has.call(obj, key)) {
      value = obj[key];

      //
      // Edge cases where we actually want to encode the value to an empty
      // string instead of the stringified value.
      //
      if (!value && (value === null || value === undef || isNaN(value))) {
        value = '';
      }

      key = encode(key);
      value = encode(value);

      //
      // If we failed to encode the strings, we should bail out as we don't
      // want to add invalid strings to the query.
      //
      if (key === null || value === null) continue;
      pairs.push(key +'='+ value);
    }
  }

  return pairs.length ? prefix + pairs.join('&') : '';
}

//
// Expose the module.
//
exports.stringify = querystringify;
exports.parse = querystring;


/***/ }),

/***/ 3062:
/***/ ((module) => {

"use strict";


/**
 * Check if we're required to add a port number.
 *
 * @see https://url.spec.whatwg.org/#default-port
 * @param {Number|String} port Port number we need to check
 * @param {String} protocol Protocol we need to check against.
 * @returns {Boolean} Is it a default port for the given protocol
 * @api private
 */
module.exports = function required(port, protocol) {
  protocol = protocol.split(':')[0];
  port = +port;

  if (!port) return false;

  switch (protocol) {
    case 'http':
    case 'ws':
    return port !== 80;

    case 'https':
    case 'wss':
    return port !== 443;

    case 'ftp':
    return port !== 21;

    case 'gopher':
    return port !== 70;

    case 'file':
    return false;
  }

  return port !== 0;
};


/***/ }),

/***/ 2225:
/***/ ((module, __unused_webpack_exports, __webpack_require__) => {

"use strict";


var required = __webpack_require__(3062)
  , qs = __webpack_require__(1359)
  , controlOrWhitespace = /^[\x00-\x20\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]+/
  , CRHTLF = /[\n\r\t]/g
  , slashes = /^[A-Za-z][A-Za-z0-9+-.]*:\/\//
  , port = /:\d+$/
  , protocolre = /^([a-z][a-z0-9.+-]*:)?(\/\/)?([\\/]+)?([\S\s]*)/i
  , windowsDriveLetter = /^[a-zA-Z]:/;

/**
 * Remove control characters and whitespace from the beginning of a string.
 *
 * @param {Object|String} str String to trim.
 * @returns {String} A new string representing `str` stripped of control
 *     characters and whitespace from its beginning.
 * @public
 */
function trimLeft(str) {
  return (str ? str : '').toString().replace(controlOrWhitespace, '');
}

/**
 * These are the parse rules for the URL parser, it informs the parser
 * about:
 *
 * 0. The char it Needs to parse, if it's a string it should be done using
 *    indexOf, RegExp using exec and NaN means set as current value.
 * 1. The property we should set when parsing this value.
 * 2. Indication if it's backwards or forward parsing, when set as number it's
 *    the value of extra chars that should be split off.
 * 3. Inherit from location if non existing in the parser.
 * 4. `toLowerCase` the resulting value.
 */
var rules = [
  ['#', 'hash'],                        // Extract from the back.
  ['?', 'query'],                       // Extract from the back.
  function sanitize(address, url) {     // Sanitize what is left of the address
    return isSpecial(url.protocol) ? address.replace(/\\/g, '/') : address;
  },
  ['/', 'pathname'],                    // Extract from the back.
  ['@', 'auth', 1],                     // Extract from the front.
  [NaN, 'host', undefined, 1, 1],       // Set left over value.
  [/:(\d*)$/, 'port', undefined, 1],    // RegExp the back.
  [NaN, 'hostname', undefined, 1, 1]    // Set left over.
];

/**
 * These properties should not be copied or inherited from. This is only needed
 * for all non blob URL's as a blob URL does not include a hash, only the
 * origin.
 *
 * @type {Object}
 * @private
 */
var ignore = { hash: 1, query: 1 };

/**
 * The location object differs when your code is loaded through a normal page,
 * Worker or through a worker using a blob. And with the blobble begins the
 * trouble as the location object will contain the URL of the blob, not the
 * location of the page where our code is loaded in. The actual origin is
 * encoded in the `pathname` so we can thankfully generate a good "default"
 * location from it so we can generate proper relative URL's again.
 *
 * @param {Object|String} loc Optional default location object.
 * @returns {Object} lolcation object.
 * @public
 */
function lolcation(loc) {
  var globalVar;

  if (typeof window !== 'undefined') globalVar = window;
  else if (typeof __webpack_require__.g !== 'undefined') globalVar = __webpack_require__.g;
  else if (typeof self !== 'undefined') globalVar = self;
  else globalVar = {};

  var location = globalVar.location || {};
  loc = loc || location;

  var finaldestination = {}
    , type = typeof loc
    , key;

  if ('blob:' === loc.protocol) {
    finaldestination = new Url(unescape(loc.pathname), {});
  } else if ('string' === type) {
    finaldestination = new Url(loc, {});
    for (key in ignore) delete finaldestination[key];
  } else if ('object' === type) {
    for (key in loc) {
      if (key in ignore) continue;
      finaldestination[key] = loc[key];
    }

    if (finaldestination.slashes === undefined) {
      finaldestination.slashes = slashes.test(loc.href);
    }
  }

  return finaldestination;
}

/**
 * Check whether a protocol scheme is special.
 *
 * @param {String} The protocol scheme of the URL
 * @return {Boolean} `true` if the protocol scheme is special, else `false`
 * @private
 */
function isSpecial(scheme) {
  return (
    scheme === 'file:' ||
    scheme === 'ftp:' ||
    scheme === 'http:' ||
    scheme === 'https:' ||
    scheme === 'ws:' ||
    scheme === 'wss:'
  );
}

/**
 * @typedef ProtocolExtract
 * @type Object
 * @property {String} protocol Protocol matched in the URL, in lowercase.
 * @property {Boolean} slashes `true` if protocol is followed by "//", else `false`.
 * @property {String} rest Rest of the URL that is not part of the protocol.
 */

/**
 * Extract protocol information from a URL with/without double slash ("//").
 *
 * @param {String} address URL we want to extract from.
 * @param {Object} location
 * @return {ProtocolExtract} Extracted information.
 * @private
 */
function extractProtocol(address, location) {
  address = trimLeft(address);
  address = address.replace(CRHTLF, '');
  location = location || {};

  var match = protocolre.exec(address);
  var protocol = match[1] ? match[1].toLowerCase() : '';
  var forwardSlashes = !!match[2];
  var otherSlashes = !!match[3];
  var slashesCount = 0;
  var rest;

  if (forwardSlashes) {
    if (otherSlashes) {
      rest = match[2] + match[3] + match[4];
      slashesCount = match[2].length + match[3].length;
    } else {
      rest = match[2] + match[4];
      slashesCount = match[2].length;
    }
  } else {
    if (otherSlashes) {
      rest = match[3] + match[4];
      slashesCount = match[3].length;
    } else {
      rest = match[4]
    }
  }

  if (protocol === 'file:') {
    if (slashesCount >= 2) {
      rest = rest.slice(2);
    }
  } else if (isSpecial(protocol)) {
    rest = match[4];
  } else if (protocol) {
    if (forwardSlashes) {
      rest = rest.slice(2);
    }
  } else if (slashesCount >= 2 && isSpecial(location.protocol)) {
    rest = match[4];
  }

  return {
    protocol: protocol,
    slashes: forwardSlashes || isSpecial(protocol),
    slashesCount: slashesCount,
    rest: rest
  };
}

/**
 * Resolve a relative URL pathname against a base URL pathname.
 *
 * @param {String} relative Pathname of the relative URL.
 * @param {String} base Pathname of the base URL.
 * @return {String} Resolved pathname.
 * @private
 */
function resolve(relative, base) {
  if (relative === '') return base;

  var path = (base || '/').split('/').slice(0, -1).concat(relative.split('/'))
    , i = path.length
    , last = path[i - 1]
    , unshift = false
    , up = 0;

  while (i--) {
    if (path[i] === '.') {
      path.splice(i, 1);
    } else if (path[i] === '..') {
      path.splice(i, 1);
      up++;
    } else if (up) {
      if (i === 0) unshift = true;
      path.splice(i, 1);
      up--;
    }
  }

  if (unshift) path.unshift('');
  if (last === '.' || last === '..') path.push('');

  return path.join('/');
}

/**
 * The actual URL instance. Instead of returning an object we've opted-in to
 * create an actual constructor as it's much more memory efficient and
 * faster and it pleases my OCD.
 *
 * It is worth noting that we should not use `URL` as class name to prevent
 * clashes with the global URL instance that got introduced in browsers.
 *
 * @constructor
 * @param {String} address URL we want to parse.
 * @param {Object|String} [location] Location defaults for relative paths.
 * @param {Boolean|Function} [parser] Parser for the query string.
 * @private
 */
function Url(address, location, parser) {
  address = trimLeft(address);
  address = address.replace(CRHTLF, '');

  if (!(this instanceof Url)) {
    return new Url(address, location, parser);
  }

  var relative, extracted, parse, instruction, index, key
    , instructions = rules.slice()
    , type = typeof location
    , url = this
    , i = 0;

  //
  // The following if statements allows this module two have compatibility with
  // 2 different API:
  //
  // 1. Node.js's `url.parse` api which accepts a URL, boolean as arguments
  //    where the boolean indicates that the query string should also be parsed.
  //
  // 2. The `URL` interface of the browser which accepts a URL, object as
  //    arguments. The supplied object will be used as default values / fall-back
  //    for relative paths.
  //
  if ('object' !== type && 'string' !== type) {
    parser = location;
    location = null;
  }

  if (parser && 'function' !== typeof parser) parser = qs.parse;

  location = lolcation(location);

  //
  // Extract protocol information before running the instructions.
  //
  extracted = extractProtocol(address || '', location);
  relative = !extracted.protocol && !extracted.slashes;
  url.slashes = extracted.slashes || relative && location.slashes;
  url.protocol = extracted.protocol || location.protocol || '';
  address = extracted.rest;

  //
  // When the authority component is absent the URL starts with a path
  // component.
  //
  if (
    extracted.protocol === 'file:' && (
      extracted.slashesCount !== 2 || windowsDriveLetter.test(address)) ||
    (!extracted.slashes &&
      (extracted.protocol ||
        extracted.slashesCount < 2 ||
        !isSpecial(url.protocol)))
  ) {
    instructions[3] = [/(.*)/, 'pathname'];
  }

  for (; i < instructions.length; i++) {
    instruction = instructions[i];

    if (typeof instruction === 'function') {
      address = instruction(address, url);
      continue;
    }

    parse = instruction[0];
    key = instruction[1];

    if (parse !== parse) {
      url[key] = address;
    } else if ('string' === typeof parse) {
      index = parse === '@'
        ? address.lastIndexOf(parse)
        : address.indexOf(parse);

      if (~index) {
        if ('number' === typeof instruction[2]) {
          url[key] = address.slice(0, index);
          address = address.slice(index + instruction[2]);
        } else {
          url[key] = address.slice(index);
          address = address.slice(0, index);
        }
      }
    } else if ((index = parse.exec(address))) {
      url[key] = index[1];
      address = address.slice(0, index.index);
    }

    url[key] = url[key] || (
      relative && instruction[3] ? location[key] || '' : ''
    );

    //
    // Hostname, host and protocol should be lowercased so they can be used to
    // create a proper `origin`.
    //
    if (instruction[4]) url[key] = url[key].toLowerCase();
  }

  //
  // Also parse the supplied query string in to an object. If we're supplied
  // with a custom parser as function use that instead of the default build-in
  // parser.
  //
  if (parser) url.query = parser(url.query);

  //
  // If the URL is relative, resolve the pathname against the base URL.
  //
  if (
      relative
    && location.slashes
    && url.pathname.charAt(0) !== '/'
    && (url.pathname !== '' || location.pathname !== '')
  ) {
    url.pathname = resolve(url.pathname, location.pathname);
  }

  //
  // Default to a / for pathname if none exists. This normalizes the URL
  // to always have a /
  //
  if (url.pathname.charAt(0) !== '/' && isSpecial(url.protocol)) {
    url.pathname = '/' + url.pathname;
  }

  //
  // We should not add port numbers if they are already the default port number
  // for a given protocol. As the host also contains the port number we're going
  // override it with the hostname which contains no port number.
  //
  if (!required(url.port, url.protocol)) {
    url.host = url.hostname;
    url.port = '';
  }

  //
  // Parse down the `auth` for the username and password.
  //
  url.username = url.password = '';

  if (url.auth) {
    index = url.auth.indexOf(':');

    if (~index) {
      url.username = url.auth.slice(0, index);
      url.username = encodeURIComponent(decodeURIComponent(url.username));

      url.password = url.auth.slice(index + 1);
      url.password = encodeURIComponent(decodeURIComponent(url.password))
    } else {
      url.username = encodeURIComponent(decodeURIComponent(url.auth));
    }

    url.auth = url.password ? url.username +':'+ url.password : url.username;
  }

  url.origin = url.protocol !== 'file:' && isSpecial(url.protocol) && url.host
    ? url.protocol +'//'+ url.host
    : 'null';

  //
  // The href is just the compiled result.
  //
  url.href = url.toString();
}

/**
 * This is convenience method for changing properties in the URL instance to
 * insure that they all propagate correctly.
 *
 * @param {String} part          Property we need to adjust.
 * @param {Mixed} value          The newly assigned value.
 * @param {Boolean|Function} fn  When setting the query, it will be the function
 *                               used to parse the query.
 *                               When setting the protocol, double slash will be
 *                               removed from the final url if it is true.
 * @returns {URL} URL instance for chaining.
 * @public
 */
function set(part, value, fn) {
  var url = this;

  switch (part) {
    case 'query':
      if ('string' === typeof value && value.length) {
        value = (fn || qs.parse)(value);
      }

      url[part] = value;
      break;

    case 'port':
      url[part] = value;

      if (!required(value, url.protocol)) {
        url.host = url.hostname;
        url[part] = '';
      } else if (value) {
        url.host = url.hostname +':'+ value;
      }

      break;

    case 'hostname':
      url[part] = value;

      if (url.port) value += ':'+ url.port;
      url.host = value;
      break;

    case 'host':
      url[part] = value;

      if (port.test(value)) {
        value = value.split(':');
        url.port = value.pop();
        url.hostname = value.join(':');
      } else {
        url.hostname = value;
        url.port = '';
      }

      break;

    case 'protocol':
      url.protocol = value.toLowerCase();
      url.slashes = !fn;
      break;

    case 'pathname':
    case 'hash':
      if (value) {
        var char = part === 'pathname' ? '/' : '#';
        url[part] = value.charAt(0) !== char ? char + value : value;
      } else {
        url[part] = value;
      }
      break;

    case 'username':
    case 'password':
      url[part] = encodeURIComponent(value);
      break;

    case 'auth':
      var index = value.indexOf(':');

      if (~index) {
        url.username = value.slice(0, index);
        url.username = encodeURIComponent(decodeURIComponent(url.username));

        url.password = value.slice(index + 1);
        url.password = encodeURIComponent(decodeURIComponent(url.password));
      } else {
        url.username = encodeURIComponent(decodeURIComponent(value));
      }
  }

  for (var i = 0; i < rules.length; i++) {
    var ins = rules[i];

    if (ins[4]) url[ins[1]] = url[ins[1]].toLowerCase();
  }

  url.auth = url.password ? url.username +':'+ url.password : url.username;

  url.origin = url.protocol !== 'file:' && isSpecial(url.protocol) && url.host
    ? url.protocol +'//'+ url.host
    : 'null';

  url.href = url.toString();

  return url;
}

/**
 * Transform the properties back in to a valid and full URL string.
 *
 * @param {Function} stringify Optional query stringify function.
 * @returns {String} Compiled version of the URL.
 * @public
 */
function toString(stringify) {
  if (!stringify || 'function' !== typeof stringify) stringify = qs.stringify;

  var query
    , url = this
    , host = url.host
    , protocol = url.protocol;

  if (protocol && protocol.charAt(protocol.length - 1) !== ':') protocol += ':';

  var result =
    protocol +
    ((url.protocol && url.slashes) || isSpecial(url.protocol) ? '//' : '');

  if (url.username) {
    result += url.username;
    if (url.password) result += ':'+ url.password;
    result += '@';
  } else if (url.password) {
    result += ':'+ url.password;
    result += '@';
  } else if (
    url.protocol !== 'file:' &&
    isSpecial(url.protocol) &&
    !host &&
    url.pathname !== '/'
  ) {
    //
    // Add back the empty userinfo, otherwise the original invalid URL
    // might be transformed into a valid one with `url.pathname` as host.
    //
    result += '@';
  }

  //
  // Trailing colon is removed from `url.host` when it is parsed. If it still
  // ends with a colon, then add back the trailing colon that was removed. This
  // prevents an invalid URL from being transformed into a valid one.
  //
  if (host[host.length - 1] === ':' || (port.test(url.hostname) && !url.port)) {
    host += ':';
  }

  result += host + url.pathname;

  query = 'object' === typeof url.query ? stringify(url.query) : url.query;
  if (query) result += '?' !== query.charAt(0) ? '?'+ query : query;

  if (url.hash) result += url.hash;

  return result;
}

Url.prototype = { set: set, toString: toString };

//
// Expose the URL parser and some additional properties that might be useful for
// others or testing.
//
Url.extractProtocol = extractProtocol;
Url.location = lolcation;
Url.trimLeft = trimLeft;
Url.qs = qs;

module.exports = Url;


/***/ }),

/***/ 7290:
/***/ ((module) => {

/*!
 * wavesurfer.js 5.2.0 (2021-08-16)
 * https://wavesurfer-js.org
 * @license BSD-3-Clause
 */
(function webpackUniversalModuleDefinition(root, factory) {
	if(true)
		module.exports = factory();
	else {}
})(self, function() {
return /******/ (() => { // webpackBootstrap
/******/ 	var __webpack_modules__ = ({

/***/ "./src/drawer.canvasentry.js":
/*!***********************************!*\
  !*** ./src/drawer.canvasentry.js ***!
  \***********************************/
/***/ ((module, exports, __nested_webpack_require_747__) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = void 0;

var _style = _interopRequireDefault(__nested_webpack_require_747__(/*! ./util/style */ "./src/util/style.js"));

var _getId = _interopRequireDefault(__nested_webpack_require_747__(/*! ./util/get-id */ "./src/util/get-id.js"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

/**
 * The `CanvasEntry` class represents an element consisting of a wave `canvas`
 * and an (optional) progress wave `canvas`.
 *
 * The `MultiCanvas` renderer uses one or more `CanvasEntry` instances to
 * render a waveform, depending on the zoom level.
 */
var CanvasEntry = /*#__PURE__*/function () {
  function CanvasEntry() {
    _classCallCheck(this, CanvasEntry);

    /**
     * The wave node
     *
     * @type {HTMLCanvasElement}
     */
    this.wave = null;
    /**
     * The wave canvas rendering context
     *
     * @type {CanvasRenderingContext2D}
     */

    this.waveCtx = null;
    /**
     * The (optional) progress wave node
     *
     * @type {HTMLCanvasElement}
     */

    this.progress = null;
    /**
     * The (optional) progress wave canvas rendering context
     *
     * @type {CanvasRenderingContext2D}
     */

    this.progressCtx = null;
    /**
     * Start of the area the canvas should render, between 0 and 1
     *
     * @type {number}
     */

    this.start = 0;
    /**
     * End of the area the canvas should render, between 0 and 1
     *
     * @type {number}
     */

    this.end = 1;
    /**
     * Unique identifier for this entry
     *
     * @type {string}
     */

    this.id = (0, _getId.default)(typeof this.constructor.name !== 'undefined' ? this.constructor.name.toLowerCase() + '_' : 'canvasentry_');
    /**
     * Canvas 2d context attributes
     *
     * @type {object}
     */

    this.canvasContextAttributes = {};
  }
  /**
   * Store the wave canvas element and create the 2D rendering context
   *
   * @param {HTMLCanvasElement} element The wave `canvas` element.
   */


  _createClass(CanvasEntry, [{
    key: "initWave",
    value: function initWave(element) {
      this.wave = element;
      this.waveCtx = this.wave.getContext('2d', this.canvasContextAttributes);
    }
    /**
     * Store the progress wave canvas element and create the 2D rendering
     * context
     *
     * @param {HTMLCanvasElement} element The progress wave `canvas` element.
     */

  }, {
    key: "initProgress",
    value: function initProgress(element) {
      this.progress = element;
      this.progressCtx = this.progress.getContext('2d', this.canvasContextAttributes);
    }
    /**
     * Update the dimensions
     *
     * @param {number} elementWidth Width of the entry
     * @param {number} totalWidth Total width of the multi canvas renderer
     * @param {number} width The new width of the element
     * @param {number} height The new height of the element
     */

  }, {
    key: "updateDimensions",
    value: function updateDimensions(elementWidth, totalWidth, width, height) {
      // where the canvas starts and ends in the waveform, represented as a
      // decimal between 0 and 1
      this.start = this.wave.offsetLeft / totalWidth || 0;
      this.end = this.start + elementWidth / totalWidth; // set wave canvas dimensions

      this.wave.width = width;
      this.wave.height = height;
      var elementSize = {
        width: elementWidth + 'px'
      };
      (0, _style.default)(this.wave, elementSize);

      if (this.hasProgressCanvas) {
        // set progress canvas dimensions
        this.progress.width = width;
        this.progress.height = height;
        (0, _style.default)(this.progress, elementSize);
      }
    }
    /**
     * Clear the wave and progress rendering contexts
     */

  }, {
    key: "clearWave",
    value: function clearWave() {
      // wave
      this.waveCtx.clearRect(0, 0, this.waveCtx.canvas.width, this.waveCtx.canvas.height); // progress

      if (this.hasProgressCanvas) {
        this.progressCtx.clearRect(0, 0, this.progressCtx.canvas.width, this.progressCtx.canvas.height);
      }
    }
    /**
     * Set the fill styles for wave and progress
     *
     * @param {string} waveColor Fill color for the wave canvas
     * @param {?string} progressColor Fill color for the progress canvas
     */

  }, {
    key: "setFillStyles",
    value: function setFillStyles(waveColor, progressColor) {
      this.waveCtx.fillStyle = waveColor;

      if (this.hasProgressCanvas) {
        this.progressCtx.fillStyle = progressColor;
      }
    }
    /**
     * Set the canvas transforms for wave and progress
     *
     * @param {boolean} vertical Whether to render vertically
     */

  }, {
    key: "applyCanvasTransforms",
    value: function applyCanvasTransforms(vertical) {
      if (vertical) {
        // Reflect the waveform across the line y = -x
        this.waveCtx.setTransform(0, 1, 1, 0, 0, 0);

        if (this.hasProgressCanvas) {
          this.progressCtx.setTransform(0, 1, 1, 0, 0, 0);
        }
      }
    }
    /**
     * Draw a rectangle for wave and progress
     *
     * @param {number} x X start position
     * @param {number} y Y start position
     * @param {number} width Width of the rectangle
     * @param {number} height Height of the rectangle
     * @param {number} radius Radius of the rectangle
     */

  }, {
    key: "fillRects",
    value: function fillRects(x, y, width, height, radius) {
      this.fillRectToContext(this.waveCtx, x, y, width, height, radius);

      if (this.hasProgressCanvas) {
        this.fillRectToContext(this.progressCtx, x, y, width, height, radius);
      }
    }
    /**
     * Draw the actual rectangle on a `canvas` element
     *
     * @param {CanvasRenderingContext2D} ctx Rendering context of target canvas
     * @param {number} x X start position
     * @param {number} y Y start position
     * @param {number} width Width of the rectangle
     * @param {number} height Height of the rectangle
     * @param {number} radius Radius of the rectangle
     */

  }, {
    key: "fillRectToContext",
    value: function fillRectToContext(ctx, x, y, width, height, radius) {
      if (!ctx) {
        return;
      }

      if (radius) {
        this.drawRoundedRect(ctx, x, y, width, height, radius);
      } else {
        ctx.fillRect(x, y, width, height);
      }
    }
    /**
     * Draw a rounded rectangle on Canvas
     *
     * @param {CanvasRenderingContext2D} ctx Canvas context
     * @param {number} x X-position of the rectangle
     * @param {number} y Y-position of the rectangle
     * @param {number} width Width of the rectangle
     * @param {number} height Height of the rectangle
     * @param {number} radius Radius of the rectangle
     *
     * @return {void}
     * @example drawRoundedRect(ctx, 50, 50, 5, 10, 3)
     */

  }, {
    key: "drawRoundedRect",
    value: function drawRoundedRect(ctx, x, y, width, height, radius) {
      if (height === 0) {
        return;
      } // peaks are float values from -1 to 1. Use absolute height values in
      // order to correctly calculate rounded rectangle coordinates


      if (height < 0) {
        height *= -1;
        y -= height;
      }

      ctx.beginPath();
      ctx.moveTo(x + radius, y);
      ctx.lineTo(x + width - radius, y);
      ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
      ctx.lineTo(x + width, y + height - radius);
      ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
      ctx.lineTo(x + radius, y + height);
      ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
      ctx.lineTo(x, y + radius);
      ctx.quadraticCurveTo(x, y, x + radius, y);
      ctx.closePath();
      ctx.fill();
    }
    /**
     * Render the actual wave and progress lines
     *
     * @param {number[]} peaks Array with peaks data
     * @param {number} absmax Maximum peak value (absolute)
     * @param {number} halfH Half the height of the waveform
     * @param {number} offsetY Offset to the top
     * @param {number} start The x-offset of the beginning of the area that
     * should be rendered
     * @param {number} end The x-offset of the end of the area that
     * should be rendered
     */

  }, {
    key: "drawLines",
    value: function drawLines(peaks, absmax, halfH, offsetY, start, end) {
      this.drawLineToContext(this.waveCtx, peaks, absmax, halfH, offsetY, start, end);

      if (this.hasProgressCanvas) {
        this.drawLineToContext(this.progressCtx, peaks, absmax, halfH, offsetY, start, end);
      }
    }
    /**
     * Render the actual waveform line on a `canvas` element
     *
     * @param {CanvasRenderingContext2D} ctx Rendering context of target canvas
     * @param {number[]} peaks Array with peaks data
     * @param {number} absmax Maximum peak value (absolute)
     * @param {number} halfH Half the height of the waveform
     * @param {number} offsetY Offset to the top
     * @param {number} start The x-offset of the beginning of the area that
     * should be rendered
     * @param {number} end The x-offset of the end of the area that
     * should be rendered
     */

  }, {
    key: "drawLineToContext",
    value: function drawLineToContext(ctx, peaks, absmax, halfH, offsetY, start, end) {
      if (!ctx) {
        return;
      }

      var length = peaks.length / 2;
      var first = Math.round(length * this.start); // use one more peak value to make sure we join peaks at ends -- unless,
      // of course, this is the last canvas

      var last = Math.round(length * this.end) + 1;
      var canvasStart = first;
      var canvasEnd = last;
      var scale = this.wave.width / (canvasEnd - canvasStart - 1); // optimization

      var halfOffset = halfH + offsetY;
      var absmaxHalf = absmax / halfH;
      ctx.beginPath();
      ctx.moveTo((canvasStart - first) * scale, halfOffset);
      ctx.lineTo((canvasStart - first) * scale, halfOffset - Math.round((peaks[2 * canvasStart] || 0) / absmaxHalf));
      var i, peak, h;

      for (i = canvasStart; i < canvasEnd; i++) {
        peak = peaks[2 * i] || 0;
        h = Math.round(peak / absmaxHalf);
        ctx.lineTo((i - first) * scale + this.halfPixel, halfOffset - h);
      } // draw the bottom edge going backwards, to make a single
      // closed hull to fill


      var j = canvasEnd - 1;

      for (j; j >= canvasStart; j--) {
        peak = peaks[2 * j + 1] || 0;
        h = Math.round(peak / absmaxHalf);
        ctx.lineTo((j - first) * scale + this.halfPixel, halfOffset - h);
      }

      ctx.lineTo((canvasStart - first) * scale, halfOffset - Math.round((peaks[2 * canvasStart + 1] || 0) / absmaxHalf));
      ctx.closePath();
      ctx.fill();
    }
    /**
     * Destroys this entry
     */

  }, {
    key: "destroy",
    value: function destroy() {
      this.waveCtx = null;
      this.wave = null;
      this.progressCtx = null;
      this.progress = null;
    }
    /**
     * Return image data of the wave `canvas` element
     *
     * When using a `type` of `'blob'`, this will return a `Promise` that
     * resolves with a `Blob` instance.
     *
     * @param {string} format='image/png' An optional value of a format type.
     * @param {number} quality=0.92 An optional value between 0 and 1.
     * @param {string} type='dataURL' Either 'dataURL' or 'blob'.
     * @return {string|Promise} When using the default `'dataURL'` `type` this
     * returns a data URL. When using the `'blob'` `type` this returns a
     * `Promise` that resolves with a `Blob` instance.
     */

  }, {
    key: "getImage",
    value: function getImage(format, quality, type) {
      var _this = this;

      if (type === 'blob') {
        return new Promise(function (resolve) {
          _this.wave.toBlob(resolve, format, quality);
        });
      } else if (type === 'dataURL') {
        return this.wave.toDataURL(format, quality);
      }
    }
  }]);

  return CanvasEntry;
}();

exports.default = CanvasEntry;
module.exports = exports.default;

/***/ }),

/***/ "./src/drawer.js":
/*!***********************!*\
  !*** ./src/drawer.js ***!
  \***********************/
/***/ ((module, exports, __nested_webpack_require_13686__) => {

"use strict";


function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = void 0;

var util = _interopRequireWildcard(__nested_webpack_require_13686__(/*! ./util */ "./src/util/index.js"));

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

/**
 * Parent class for renderers
 *
 * @extends {Observer}
 */
var Drawer = /*#__PURE__*/function (_util$Observer) {
  _inherits(Drawer, _util$Observer);

  var _super = _createSuper(Drawer);

  /**
   * @param {HTMLElement} container The container node of the wavesurfer instance
   * @param {WavesurferParams} params The wavesurfer initialisation options
   */
  function Drawer(container, params) {
    var _this;

    _classCallCheck(this, Drawer);

    _this = _super.call(this);
    _this.container = util.withOrientation(container, params.vertical);
    /**
     * @type {WavesurferParams}
     */

    _this.params = params;
    /**
     * The width of the renderer
     * @type {number}
     */

    _this.width = 0;
    /**
     * The height of the renderer
     * @type {number}
     */

    _this.height = params.height * _this.params.pixelRatio;
    _this.lastPos = 0;
    /**
     * The `<wave>` element which is added to the container
     * @type {HTMLElement}
     */

    _this.wrapper = null;
    return _this;
  }
  /**
   * Alias of `util.style`
   *
   * @param {HTMLElement} el The element that the styles will be applied to
   * @param {Object} styles The map of propName: attribute, both are used as-is
   * @return {HTMLElement} el
   */


  _createClass(Drawer, [{
    key: "style",
    value: function style(el, styles) {
      return util.style(el, styles);
    }
    /**
     * Create the wrapper `<wave>` element, style it and set up the events for
     * interaction
     */

  }, {
    key: "createWrapper",
    value: function createWrapper() {
      this.wrapper = util.withOrientation(this.container.appendChild(document.createElement('wave')), this.params.vertical);
      this.style(this.wrapper, {
        display: 'block',
        position: 'relative',
        userSelect: 'none',
        webkitUserSelect: 'none',
        height: this.params.height + 'px'
      });

      if (this.params.fillParent || this.params.scrollParent) {
        this.style(this.wrapper, {
          width: '100%',
          overflowX: this.params.hideScrollbar ? 'hidden' : 'auto',
          overflowY: 'hidden'
        });
      }

      this.setupWrapperEvents();
    }
    /**
     * Handle click event
     *
     * @param {Event} e Click event
     * @param {?boolean} noPrevent Set to true to not call `e.preventDefault()`
     * @return {number} Playback position from 0 to 1
     */

  }, {
    key: "handleEvent",
    value: function handleEvent(e, noPrevent) {
      !noPrevent && e.preventDefault();
      var clientX = util.withOrientation(e.targetTouches ? e.targetTouches[0] : e, this.params.vertical).clientX;
      var bbox = this.wrapper.getBoundingClientRect();
      var nominalWidth = this.width;
      var parentWidth = this.getWidth();
      var progressPixels = this.getProgressPixels(bbox, clientX);
      var progress;

      if (!this.params.fillParent && nominalWidth < parentWidth) {
        progress = progressPixels * (this.params.pixelRatio / nominalWidth) || 0;
      } else {
        progress = (progressPixels + this.wrapper.scrollLeft) / this.wrapper.scrollWidth || 0;
      }

      return util.clamp(progress, 0, 1);
    }
  }, {
    key: "getProgressPixels",
    value: function getProgressPixels(wrapperBbox, clientX) {
      if (this.params.rtl) {
        return wrapperBbox.right - clientX;
      } else {
        return clientX - wrapperBbox.left;
      }
    }
  }, {
    key: "setupWrapperEvents",
    value: function setupWrapperEvents() {
      var _this2 = this;

      this.wrapper.addEventListener('click', function (e) {
        var orientedEvent = util.withOrientation(e, _this2.params.vertical);
        var scrollbarHeight = _this2.wrapper.offsetHeight - _this2.wrapper.clientHeight;

        if (scrollbarHeight !== 0) {
          // scrollbar is visible.  Check if click was on it
          var bbox = _this2.wrapper.getBoundingClientRect();

          if (orientedEvent.clientY >= bbox.bottom - scrollbarHeight) {
            // ignore mousedown as it was on the scrollbar
            return;
          }
        }

        if (_this2.params.interact) {
          _this2.fireEvent('click', e, _this2.handleEvent(e));
        }
      });
      this.wrapper.addEventListener('dblclick', function (e) {
        if (_this2.params.interact) {
          _this2.fireEvent('dblclick', e, _this2.handleEvent(e));
        }
      });
      this.wrapper.addEventListener('scroll', function (e) {
        return _this2.fireEvent('scroll', e);
      });
    }
    /**
     * Draw peaks on the canvas
     *
     * @param {number[]|Number.<Array[]>} peaks Can also be an array of arrays
     * for split channel rendering
     * @param {number} length The width of the area that should be drawn
     * @param {number} start The x-offset of the beginning of the area that
     * should be rendered
     * @param {number} end The x-offset of the end of the area that should be
     * rendered
     */

  }, {
    key: "drawPeaks",
    value: function drawPeaks(peaks, length, start, end) {
      if (!this.setWidth(length)) {
        this.clearWave();
      }

      this.params.barWidth ? this.drawBars(peaks, 0, start, end) : this.drawWave(peaks, 0, start, end);
    }
    /**
     * Scroll to the beginning
     */

  }, {
    key: "resetScroll",
    value: function resetScroll() {
      if (this.wrapper !== null) {
        this.wrapper.scrollLeft = 0;
      }
    }
    /**
     * Recenter the view-port at a certain percent of the waveform
     *
     * @param {number} percent Value from 0 to 1 on the waveform
     */

  }, {
    key: "recenter",
    value: function recenter(percent) {
      var position = this.wrapper.scrollWidth * percent;
      this.recenterOnPosition(position, true);
    }
    /**
     * Recenter the view-port on a position, either scroll there immediately or
     * in steps of 5 pixels
     *
     * @param {number} position X-offset in pixels
     * @param {boolean} immediate Set to true to immediately scroll somewhere
     */

  }, {
    key: "recenterOnPosition",
    value: function recenterOnPosition(position, immediate) {
      var scrollLeft = this.wrapper.scrollLeft;
      var half = ~~(this.wrapper.clientWidth / 2);
      var maxScroll = this.wrapper.scrollWidth - this.wrapper.clientWidth;
      var target = position - half;
      var offset = target - scrollLeft;

      if (maxScroll == 0) {
        // no need to continue if scrollbar is not there
        return;
      } // if the cursor is currently visible...


      if (!immediate && -half <= offset && offset < half) {
        // set rate at which waveform is centered
        var rate = this.params.autoCenterRate; // make rate depend on width of view and length of waveform

        rate /= half;
        rate *= maxScroll;
        offset = Math.max(-rate, Math.min(rate, offset));
        target = scrollLeft + offset;
      } // limit target to valid range (0 to maxScroll)


      target = Math.max(0, Math.min(maxScroll, target)); // no use attempting to scroll if we're not moving

      if (target != scrollLeft) {
        this.wrapper.scrollLeft = target;
      }
    }
    /**
     * Get the current scroll position in pixels
     *
     * @return {number} Horizontal scroll position in pixels
     */

  }, {
    key: "getScrollX",
    value: function getScrollX() {
      var x = 0;

      if (this.wrapper) {
        var pixelRatio = this.params.pixelRatio;
        x = Math.round(this.wrapper.scrollLeft * pixelRatio); // In cases of elastic scroll (safari with mouse wheel) you can
        // scroll beyond the limits of the container
        // Calculate and floor the scrollable extent to make sure an out
        // of bounds value is not returned
        // Ticket #1312

        if (this.params.scrollParent) {
          var maxScroll = ~~(this.wrapper.scrollWidth * pixelRatio - this.getWidth());
          x = Math.min(maxScroll, Math.max(0, x));
        }
      }

      return x;
    }
    /**
     * Get the width of the container
     *
     * @return {number} The width of the container
     */

  }, {
    key: "getWidth",
    value: function getWidth() {
      return Math.round(this.container.clientWidth * this.params.pixelRatio);
    }
    /**
     * Set the width of the container
     *
     * @param {number} width The new width of the container
     * @return {boolean} Whether the width of the container was updated or not
     */

  }, {
    key: "setWidth",
    value: function setWidth(width) {
      if (this.width == width) {
        return false;
      }

      this.width = width;

      if (this.params.fillParent || this.params.scrollParent) {
        this.style(this.wrapper, {
          width: ''
        });
      } else {
        var newWidth = ~~(this.width / this.params.pixelRatio) + 'px';
        this.style(this.wrapper, {
          width: newWidth
        });
      }

      this.updateSize();
      return true;
    }
    /**
     * Set the height of the container
     *
     * @param {number} height The new height of the container.
     * @return {boolean} Whether the height of the container was updated or not
     */

  }, {
    key: "setHeight",
    value: function setHeight(height) {
      if (height == this.height) {
        return false;
      }

      this.height = height;
      this.style(this.wrapper, {
        height: ~~(this.height / this.params.pixelRatio) + 'px'
      });
      this.updateSize();
      return true;
    }
    /**
     * Called by wavesurfer when progress should be rendered
     *
     * @param {number} progress From 0 to 1
     */

  }, {
    key: "progress",
    value: function progress(_progress) {
      var minPxDelta = 1 / this.params.pixelRatio;
      var pos = Math.round(_progress * this.width) * minPxDelta;

      if (pos < this.lastPos || pos - this.lastPos >= minPxDelta) {
        this.lastPos = pos;

        if (this.params.scrollParent && this.params.autoCenter) {
          var newPos = ~~(this.wrapper.scrollWidth * _progress);
          this.recenterOnPosition(newPos, this.params.autoCenterImmediately);
        }

        this.updateProgress(pos);
      }
    }
    /**
     * This is called when wavesurfer is destroyed
     */

  }, {
    key: "destroy",
    value: function destroy() {
      this.unAll();

      if (this.wrapper) {
        if (this.wrapper.parentNode == this.container.domElement) {
          this.container.removeChild(this.wrapper.domElement);
        }

        this.wrapper = null;
      }
    }
    /* Renderer-specific methods */

    /**
     * Called after cursor related params have changed.
     *
     * @abstract
     */

  }, {
    key: "updateCursor",
    value: function updateCursor() {}
    /**
     * Called when the size of the container changes so the renderer can adjust
     *
     * @abstract
     */

  }, {
    key: "updateSize",
    value: function updateSize() {}
    /**
     * Draw a waveform with bars
     *
     * @abstract
     * @param {number[]|Number.<Array[]>} peaks Can also be an array of arrays for split channel
     * rendering
     * @param {number} channelIndex The index of the current channel. Normally
     * should be 0
     * @param {number} start The x-offset of the beginning of the area that
     * should be rendered
     * @param {number} end The x-offset of the end of the area that should be
     * rendered
     */

  }, {
    key: "drawBars",
    value: function drawBars(peaks, channelIndex, start, end) {}
    /**
     * Draw a waveform
     *
     * @abstract
     * @param {number[]|Number.<Array[]>} peaks Can also be an array of arrays for split channel
     * rendering
     * @param {number} channelIndex The index of the current channel. Normally
     * should be 0
     * @param {number} start The x-offset of the beginning of the area that
     * should be rendered
     * @param {number} end The x-offset of the end of the area that should be
     * rendered
     */

  }, {
    key: "drawWave",
    value: function drawWave(peaks, channelIndex, start, end) {}
    /**
     * Clear the waveform
     *
     * @abstract
     */

  }, {
    key: "clearWave",
    value: function clearWave() {}
    /**
     * Render the new progress
     *
     * @abstract
     * @param {number} position X-Offset of progress position in pixels
     */

  }, {
    key: "updateProgress",
    value: function updateProgress(position) {}
  }]);

  return Drawer;
}(util.Observer);

exports.default = Drawer;
module.exports = exports.default;

/***/ }),

/***/ "./src/drawer.multicanvas.js":
/*!***********************************!*\
  !*** ./src/drawer.multicanvas.js ***!
  \***********************************/
/***/ ((module, exports, __nested_webpack_require_30815__) => {

"use strict";


function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = void 0;

var _drawer = _interopRequireDefault(__nested_webpack_require_30815__(/*! ./drawer */ "./src/drawer.js"));

var util = _interopRequireWildcard(__nested_webpack_require_30815__(/*! ./util */ "./src/util/index.js"));

var _drawer2 = _interopRequireDefault(__nested_webpack_require_30815__(/*! ./drawer.canvasentry */ "./src/drawer.canvasentry.js"));

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

/**
 * MultiCanvas renderer for wavesurfer. Is currently the default and sole
 * builtin renderer.
 *
 * A `MultiCanvas` consists of one or more `CanvasEntry` instances, depending
 * on the zoom level.
 */
var MultiCanvas = /*#__PURE__*/function (_Drawer) {
  _inherits(MultiCanvas, _Drawer);

  var _super = _createSuper(MultiCanvas);

  /**
   * @param {HTMLElement} container The container node of the wavesurfer instance
   * @param {WavesurferParams} params The wavesurfer initialisation options
   */
  function MultiCanvas(container, params) {
    var _this;

    _classCallCheck(this, MultiCanvas);

    _this = _super.call(this, container, params);
    /**
     * @type {number}
     */

    _this.maxCanvasWidth = params.maxCanvasWidth;
    /**
     * @type {number}
     */

    _this.maxCanvasElementWidth = Math.round(params.maxCanvasWidth / params.pixelRatio);
    /**
     * Whether or not the progress wave is rendered. If the `waveColor`
     * and `progressColor` are the same color it is not.
     *
     * @type {boolean}
     */

    _this.hasProgressCanvas = params.waveColor != params.progressColor;
    /**
     * @type {number}
     */

    _this.halfPixel = 0.5 / params.pixelRatio;
    /**
     * List of `CanvasEntry` instances.
     *
     * @type {Array}
     */

    _this.canvases = [];
    /**
     * @type {HTMLElement}
     */

    _this.progressWave = null;
    /**
     * Class used to generate entries.
     *
     * @type {function}
     */

    _this.EntryClass = _drawer2.default;
    /**
     * Canvas 2d context attributes.
     *
     * @type {object}
     */

    _this.canvasContextAttributes = params.drawingContextAttributes;
    /**
     * Overlap added between entries to prevent vertical white stripes
     * between `canvas` elements.
     *
     * @type {number}
     */

    _this.overlap = 2 * Math.ceil(params.pixelRatio / 2);
    /**
     * The radius of the wave bars. Makes bars rounded
     *
     * @type {number}
     */

    _this.barRadius = params.barRadius || 0;
    /**
     * Whether to render the waveform vertically. Defaults to false.
     *
     * @type {boolean}
     */

    _this.vertical = params.vertical;
    return _this;
  }
  /**
   * Initialize the drawer
   */


  _createClass(MultiCanvas, [{
    key: "init",
    value: function init() {
      this.createWrapper();
      this.createElements();
    }
    /**
     * Create the canvas elements and style them
     *
     */

  }, {
    key: "createElements",
    value: function createElements() {
      this.progressWave = util.withOrientation(this.wrapper.appendChild(document.createElement('wave')), this.params.vertical);
      this.style(this.progressWave, {
        position: 'absolute',
        zIndex: 3,
        left: 0,
        top: 0,
        bottom: 0,
        overflow: 'hidden',
        width: '0',
        display: 'none',
        boxSizing: 'border-box',
        borderRightStyle: 'solid',
        pointerEvents: 'none'
      });
      this.addCanvas();
      this.updateCursor();
    }
    /**
     * Update cursor style
     */

  }, {
    key: "updateCursor",
    value: function updateCursor() {
      this.style(this.progressWave, {
        borderRightWidth: this.params.cursorWidth + 'px',
        borderRightColor: this.params.cursorColor
      });
    }
    /**
     * Adjust to the updated size by adding or removing canvases
     */

  }, {
    key: "updateSize",
    value: function updateSize() {
      var _this2 = this;

      var totalWidth = Math.round(this.width / this.params.pixelRatio);
      var requiredCanvases = Math.ceil(totalWidth / (this.maxCanvasElementWidth + this.overlap)); // add required canvases

      while (this.canvases.length < requiredCanvases) {
        this.addCanvas();
      } // remove older existing canvases, if any


      while (this.canvases.length > requiredCanvases) {
        this.removeCanvas();
      }

      var canvasWidth = this.maxCanvasWidth + this.overlap;
      var lastCanvas = this.canvases.length - 1;
      this.canvases.forEach(function (entry, i) {
        if (i == lastCanvas) {
          canvasWidth = _this2.width - _this2.maxCanvasWidth * lastCanvas;
        }

        _this2.updateDimensions(entry, canvasWidth, _this2.height);

        entry.clearWave();
      });
    }
    /**
     * Add a canvas to the canvas list
     *
     */

  }, {
    key: "addCanvas",
    value: function addCanvas() {
      var entry = new this.EntryClass();
      entry.canvasContextAttributes = this.canvasContextAttributes;
      entry.hasProgressCanvas = this.hasProgressCanvas;
      entry.halfPixel = this.halfPixel;
      var leftOffset = this.maxCanvasElementWidth * this.canvases.length; // wave

      var wave = util.withOrientation(this.wrapper.appendChild(document.createElement('canvas')), this.params.vertical);
      this.style(wave, {
        position: 'absolute',
        zIndex: 2,
        left: leftOffset + 'px',
        top: 0,
        bottom: 0,
        height: '100%',
        pointerEvents: 'none'
      });
      entry.initWave(wave); // progress

      if (this.hasProgressCanvas) {
        var progress = util.withOrientation(this.progressWave.appendChild(document.createElement('canvas')), this.params.vertical);
        this.style(progress, {
          position: 'absolute',
          left: leftOffset + 'px',
          top: 0,
          bottom: 0,
          height: '100%'
        });
        entry.initProgress(progress);
      }

      this.canvases.push(entry);
    }
    /**
     * Pop single canvas from the list
     *
     */

  }, {
    key: "removeCanvas",
    value: function removeCanvas() {
      var lastEntry = this.canvases[this.canvases.length - 1]; // wave

      lastEntry.wave.parentElement.removeChild(lastEntry.wave.domElement); // progress

      if (this.hasProgressCanvas) {
        lastEntry.progress.parentElement.removeChild(lastEntry.progress.domElement);
      } // cleanup


      if (lastEntry) {
        lastEntry.destroy();
        lastEntry = null;
      }

      this.canvases.pop();
    }
    /**
     * Update the dimensions of a canvas element
     *
     * @param {CanvasEntry} entry Target entry
     * @param {number} width The new width of the element
     * @param {number} height The new height of the element
     */

  }, {
    key: "updateDimensions",
    value: function updateDimensions(entry, width, height) {
      var elementWidth = Math.round(width / this.params.pixelRatio);
      var totalWidth = Math.round(this.width / this.params.pixelRatio); // update canvas dimensions

      entry.updateDimensions(elementWidth, totalWidth, width, height); // style element

      this.style(this.progressWave, {
        display: 'block'
      });
    }
    /**
     * Clear the whole multi-canvas
     */

  }, {
    key: "clearWave",
    value: function clearWave() {
      var _this3 = this;

      util.frame(function () {
        _this3.canvases.forEach(function (entry) {
          return entry.clearWave();
        });
      })();
    }
    /**
     * Draw a waveform with bars
     *
     * @param {number[]|Number.<Array[]>} peaks Can also be an array of arrays
     * for split channel rendering
     * @param {number} channelIndex The index of the current channel. Normally
     * should be 0. Must be an integer.
     * @param {number} start The x-offset of the beginning of the area that
     * should be rendered
     * @param {number} end The x-offset of the end of the area that should be
     * rendered
     * @returns {void}
     */

  }, {
    key: "drawBars",
    value: function drawBars(peaks, channelIndex, start, end) {
      var _this4 = this;

      return this.prepareDraw(peaks, channelIndex, start, end, function (_ref) {
        var absmax = _ref.absmax,
            hasMinVals = _ref.hasMinVals,
            height = _ref.height,
            offsetY = _ref.offsetY,
            halfH = _ref.halfH,
            peaks = _ref.peaks,
            ch = _ref.channelIndex;

        // if drawBars was called within ws.empty we don't pass a start and
        // don't want anything to happen
        if (start === undefined) {
          return;
        } // Skip every other value if there are negatives.


        var peakIndexScale = hasMinVals ? 2 : 1;
        var length = peaks.length / peakIndexScale;
        var bar = _this4.params.barWidth * _this4.params.pixelRatio;
        var gap = _this4.params.barGap === null ? Math.max(_this4.params.pixelRatio, ~~(bar / 2)) : Math.max(_this4.params.pixelRatio, _this4.params.barGap * _this4.params.pixelRatio);
        var step = bar + gap;
        var scale = length / _this4.width;
        var first = start;
        var last = end;
        var i = first;

        for (i; i < last; i += step) {
          var peak = peaks[Math.floor(i * scale * peakIndexScale)] || 0;
          var h = Math.round(peak / absmax * halfH);
          /* in case of silences, allow the user to specify that we
           * always draw *something* (normally a 1px high bar) */

          if (h == 0 && _this4.params.barMinHeight) {
            h = _this4.params.barMinHeight;
          }

          _this4.fillRect(i + _this4.halfPixel, halfH - h + offsetY, bar + _this4.halfPixel, h * 2, _this4.barRadius, ch);
        }
      });
    }
    /**
     * Draw a waveform
     *
     * @param {number[]|Number.<Array[]>} peaks Can also be an array of arrays
     * for split channel rendering
     * @param {number} channelIndex The index of the current channel. Normally
     * should be 0
     * @param {number?} start The x-offset of the beginning of the area that
     * should be rendered (If this isn't set only a flat line is rendered)
     * @param {number?} end The x-offset of the end of the area that should be
     * rendered
     * @returns {void}
     */

  }, {
    key: "drawWave",
    value: function drawWave(peaks, channelIndex, start, end) {
      var _this5 = this;

      return this.prepareDraw(peaks, channelIndex, start, end, function (_ref2) {
        var absmax = _ref2.absmax,
            hasMinVals = _ref2.hasMinVals,
            height = _ref2.height,
            offsetY = _ref2.offsetY,
            halfH = _ref2.halfH,
            peaks = _ref2.peaks,
            channelIndex = _ref2.channelIndex;

        if (!hasMinVals) {
          var reflectedPeaks = [];
          var len = peaks.length;
          var i = 0;

          for (i; i < len; i++) {
            reflectedPeaks[2 * i] = peaks[i];
            reflectedPeaks[2 * i + 1] = -peaks[i];
          }

          peaks = reflectedPeaks;
        } // if drawWave was called within ws.empty we don't pass a start and
        // end and simply want a flat line


        if (start !== undefined) {
          _this5.drawLine(peaks, absmax, halfH, offsetY, start, end, channelIndex);
        } // always draw a median line


        _this5.fillRect(0, halfH + offsetY - _this5.halfPixel, _this5.width, _this5.halfPixel, _this5.barRadius, channelIndex);
      });
    }
    /**
     * Tell the canvas entries to render their portion of the waveform
     *
     * @param {number[]} peaks Peaks data
     * @param {number} absmax Maximum peak value (absolute)
     * @param {number} halfH Half the height of the waveform
     * @param {number} offsetY Offset to the top
     * @param {number} start The x-offset of the beginning of the area that
     * should be rendered
     * @param {number} end The x-offset of the end of the area that
     * should be rendered
     * @param {channelIndex} channelIndex The channel index of the line drawn
     */

  }, {
    key: "drawLine",
    value: function drawLine(peaks, absmax, halfH, offsetY, start, end, channelIndex) {
      var _this6 = this;

      var _ref3 = this.params.splitChannelsOptions.channelColors[channelIndex] || {},
          waveColor = _ref3.waveColor,
          progressColor = _ref3.progressColor;

      this.canvases.forEach(function (entry, i) {
        _this6.setFillStyles(entry, waveColor, progressColor);

        _this6.applyCanvasTransforms(entry, _this6.params.vertical);

        entry.drawLines(peaks, absmax, halfH, offsetY, start, end);
      });
    }
    /**
     * Draw a rectangle on the multi-canvas
     *
     * @param {number} x X-position of the rectangle
     * @param {number} y Y-position of the rectangle
     * @param {number} width Width of the rectangle
     * @param {number} height Height of the rectangle
     * @param {number} radius Radius of the rectangle
     * @param {channelIndex} channelIndex The channel index of the bar drawn
     */

  }, {
    key: "fillRect",
    value: function fillRect(x, y, width, height, radius, channelIndex) {
      var startCanvas = Math.floor(x / this.maxCanvasWidth);
      var endCanvas = Math.min(Math.ceil((x + width) / this.maxCanvasWidth) + 1, this.canvases.length);
      var i = startCanvas;

      for (i; i < endCanvas; i++) {
        var entry = this.canvases[i];
        var leftOffset = i * this.maxCanvasWidth;
        var intersection = {
          x1: Math.max(x, i * this.maxCanvasWidth),
          y1: y,
          x2: Math.min(x + width, i * this.maxCanvasWidth + entry.wave.width),
          y2: y + height
        };

        if (intersection.x1 < intersection.x2) {
          var _ref4 = this.params.splitChannelsOptions.channelColors[channelIndex] || {},
              waveColor = _ref4.waveColor,
              progressColor = _ref4.progressColor;

          this.setFillStyles(entry, waveColor, progressColor);
          this.applyCanvasTransforms(entry, this.params.vertical);
          entry.fillRects(intersection.x1 - leftOffset, intersection.y1, intersection.x2 - intersection.x1, intersection.y2 - intersection.y1, radius);
        }
      }
    }
    /**
     * Returns whether to hide the channel from being drawn based on params.
     *
     * @param {number} channelIndex The index of the current channel.
     * @returns {bool} True to hide the channel, false to draw.
     */

  }, {
    key: "hideChannel",
    value: function hideChannel(channelIndex) {
      return this.params.splitChannels && this.params.splitChannelsOptions.filterChannels.includes(channelIndex);
    }
    /**
     * Performs preparation tasks and calculations which are shared by `drawBars`
     * and `drawWave`
     *
     * @param {number[]|Number.<Array[]>} peaks Can also be an array of arrays for
     * split channel rendering
     * @param {number} channelIndex The index of the current channel. Normally
     * should be 0
     * @param {number?} start The x-offset of the beginning of the area that
     * should be rendered. If this isn't set only a flat line is rendered
     * @param {number?} end The x-offset of the end of the area that should be
     * rendered
     * @param {function} fn The render function to call, e.g. `drawWave`
     * @param {number} drawIndex The index of the current channel after filtering.
     * @param {number?} normalizedMax Maximum modulation value across channels for use with relativeNormalization. Ignored when undefined
     * @returns {void}
     */

  }, {
    key: "prepareDraw",
    value: function prepareDraw(peaks, channelIndex, start, end, fn, drawIndex, normalizedMax) {
      var _this7 = this;

      return util.frame(function () {
        // Split channels and call this function with the channelIndex set
        if (peaks[0] instanceof Array) {
          var channels = peaks;

          if (_this7.params.splitChannels) {
            var filteredChannels = channels.filter(function (c, i) {
              return !_this7.hideChannel(i);
            });

            if (!_this7.params.splitChannelsOptions.overlay) {
              _this7.setHeight(Math.max(filteredChannels.length, 1) * _this7.params.height * _this7.params.pixelRatio);
            }

            var overallAbsMax;

            if (_this7.params.splitChannelsOptions && _this7.params.splitChannelsOptions.relativeNormalization) {
              // calculate maximum peak across channels to use for normalization
              overallAbsMax = util.max(channels.map(function (channelPeaks) {
                return util.absMax(channelPeaks);
              }));
            }

            return channels.forEach(function (channelPeaks, i) {
              return _this7.prepareDraw(channelPeaks, i, start, end, fn, filteredChannels.indexOf(channelPeaks), overallAbsMax);
            });
          }

          peaks = channels[0];
        } // Return and do not draw channel peaks if hidden.


        if (_this7.hideChannel(channelIndex)) {
          return;
        } // calculate maximum modulation value, either from the barHeight
        // parameter or if normalize=true from the largest value in the peak
        // set


        var absmax = 1 / _this7.params.barHeight;

        if (_this7.params.normalize) {
          absmax = normalizedMax === undefined ? util.absMax(peaks) : normalizedMax;
        } // Bar wave draws the bottom only as a reflection of the top,
        // so we don't need negative values


        var hasMinVals = [].some.call(peaks, function (val) {
          return val < 0;
        });
        var height = _this7.params.height * _this7.params.pixelRatio;
        var halfH = height / 2;
        var offsetY = height * drawIndex || 0; // Override offsetY if overlay is true

        if (_this7.params.splitChannelsOptions && _this7.params.splitChannelsOptions.overlay) {
          offsetY = 0;
        }

        return fn({
          absmax: absmax,
          hasMinVals: hasMinVals,
          height: height,
          offsetY: offsetY,
          halfH: halfH,
          peaks: peaks,
          channelIndex: channelIndex
        });
      })();
    }
    /**
     * Set the fill styles for a certain entry (wave and progress)
     *
     * @param {CanvasEntry} entry Target entry
     * @param {string} waveColor Wave color to draw this entry
     * @param {string} progressColor Progress color to draw this entry
     */

  }, {
    key: "setFillStyles",
    value: function setFillStyles(entry) {
      var waveColor = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.params.waveColor;
      var progressColor = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : this.params.progressColor;
      entry.setFillStyles(waveColor, progressColor);
    }
    /**
     * Set the canvas transforms for a certain entry (wave and progress)
     *
     * @param {CanvasEntry} entry Target entry
     * @param {boolean} vertical Whether to render the waveform vertically
     */

  }, {
    key: "applyCanvasTransforms",
    value: function applyCanvasTransforms(entry) {
      var vertical = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
      entry.applyCanvasTransforms(vertical);
    }
    /**
     * Return image data of the multi-canvas
     *
     * When using a `type` of `'blob'`, this will return a `Promise`.
     *
     * @param {string} format='image/png' An optional value of a format type.
     * @param {number} quality=0.92 An optional value between 0 and 1.
     * @param {string} type='dataURL' Either 'dataURL' or 'blob'.
     * @return {string|string[]|Promise} When using the default `'dataURL'`
     * `type` this returns a single data URL or an array of data URLs,
     * one for each canvas. When using the `'blob'` `type` this returns a
     * `Promise` that resolves with an array of `Blob` instances, one for each
     * canvas.
     */

  }, {
    key: "getImage",
    value: function getImage(format, quality, type) {
      if (type === 'blob') {
        return Promise.all(this.canvases.map(function (entry) {
          return entry.getImage(format, quality, type);
        }));
      } else if (type === 'dataURL') {
        var images = this.canvases.map(function (entry) {
          return entry.getImage(format, quality, type);
        });
        return images.length > 1 ? images : images[0];
      }
    }
    /**
     * Render the new progress
     *
     * @param {number} position X-offset of progress position in pixels
     */

  }, {
    key: "updateProgress",
    value: function updateProgress(position) {
      this.style(this.progressWave, {
        width: position + 'px'
      });
    }
  }]);

  return MultiCanvas;
}(_drawer.default);

exports.default = MultiCanvas;
module.exports = exports.default;

/***/ }),

/***/ "./src/mediaelement-webaudio.js":
/*!**************************************!*\
  !*** ./src/mediaelement-webaudio.js ***!
  \**************************************/
/***/ ((module, exports, __nested_webpack_require_56119__) => {

"use strict";


function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = void 0;

var _mediaelement = _interopRequireDefault(__nested_webpack_require_56119__(/*! ./mediaelement */ "./src/mediaelement.js"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _get(target, property, receiver) { if (typeof Reflect !== "undefined" && Reflect.get) { _get = Reflect.get; } else { _get = function _get(target, property, receiver) { var base = _superPropBase(target, property); if (!base) return; var desc = Object.getOwnPropertyDescriptor(base, property); if (desc.get) { return desc.get.call(receiver); } return desc.value; }; } return _get(target, property, receiver || target); }

function _superPropBase(object, property) { while (!Object.prototype.hasOwnProperty.call(object, property)) { object = _getPrototypeOf(object); if (object === null) break; } return object; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

/**
 * MediaElementWebAudio backend: load audio via an HTML5 audio tag, but playback with the WebAudio API.
 * The advantage here is that the html5 <audio> tag can perform range requests on the server and not
 * buffer the entire file in one request, and you still get the filtering and scripting functionality
 * of the webaudio API.
 * Note that in order to use range requests and prevent buffering, you must provide peak data.
 *
 * @since 3.2.0
 */
var MediaElementWebAudio = /*#__PURE__*/function (_MediaElement) {
  _inherits(MediaElementWebAudio, _MediaElement);

  var _super = _createSuper(MediaElementWebAudio);

  /**
   * Construct the backend
   *
   * @param {WavesurferParams} params Wavesurfer parameters
   */
  function MediaElementWebAudio(params) {
    var _this;

    _classCallCheck(this, MediaElementWebAudio);

    _this = _super.call(this, params);
    /** @private */

    _this.params = params;
    /** @private */

    _this.sourceMediaElement = null;
    return _this;
  }
  /**
   * Initialise the backend, called in `wavesurfer.createBackend()`
   */


  _createClass(MediaElementWebAudio, [{
    key: "init",
    value: function init() {
      this.setPlaybackRate(this.params.audioRate);
      this.createTimer();
      this.createVolumeNode();
      this.createScriptNode();
      this.createAnalyserNode();
    }
    /**
     * Private method called by both `load` (from url)
     * and `loadElt` (existing media element) methods.
     *
     * @param {HTMLMediaElement} media HTML5 Audio or Video element
     * @param {number[]|Number.<Array[]>} peaks Array of peak data
     * @param {string} preload HTML 5 preload attribute value
     * @private
     */

  }, {
    key: "_load",
    value: function _load(media, peaks, preload) {
      _get(_getPrototypeOf(MediaElementWebAudio.prototype), "_load", this).call(this, media, peaks, preload);

      this.createMediaElementSource(media);
    }
    /**
     * Create MediaElementSource node
     *
     * @since 3.2.0
     * @param {HTMLMediaElement} mediaElement HTML5 Audio to load
     */

  }, {
    key: "createMediaElementSource",
    value: function createMediaElementSource(mediaElement) {
      this.sourceMediaElement = this.ac.createMediaElementSource(mediaElement);
      this.sourceMediaElement.connect(this.analyser);
    }
  }, {
    key: "play",
    value: function play(start, end) {
      this.resumeAudioContext();
      return _get(_getPrototypeOf(MediaElementWebAudio.prototype), "play", this).call(this, start, end);
    }
    /**
     * This is called when wavesurfer is destroyed
     *
     */

  }, {
    key: "destroy",
    value: function destroy() {
      _get(_getPrototypeOf(MediaElementWebAudio.prototype), "destroy", this).call(this);

      this.destroyWebAudio();
    }
  }]);

  return MediaElementWebAudio;
}(_mediaelement.default);

exports.default = MediaElementWebAudio;
module.exports = exports.default;

/***/ }),

/***/ "./src/mediaelement.js":
/*!*****************************!*\
  !*** ./src/mediaelement.js ***!
  \*****************************/
/***/ ((module, exports, __nested_webpack_require_63244__) => {

"use strict";


function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = void 0;

var _webaudio = _interopRequireDefault(__nested_webpack_require_63244__(/*! ./webaudio */ "./src/webaudio.js"));

var util = _interopRequireWildcard(__nested_webpack_require_63244__(/*! ./util */ "./src/util/index.js"));

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _get(target, property, receiver) { if (typeof Reflect !== "undefined" && Reflect.get) { _get = Reflect.get; } else { _get = function _get(target, property, receiver) { var base = _superPropBase(target, property); if (!base) return; var desc = Object.getOwnPropertyDescriptor(base, property); if (desc.get) { return desc.get.call(receiver); } return desc.value; }; } return _get(target, property, receiver || target); }

function _superPropBase(object, property) { while (!Object.prototype.hasOwnProperty.call(object, property)) { object = _getPrototypeOf(object); if (object === null) break; } return object; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

/**
 * MediaElement backend
 */
var MediaElement = /*#__PURE__*/function (_WebAudio) {
  _inherits(MediaElement, _WebAudio);

  var _super = _createSuper(MediaElement);

  /**
   * Construct the backend
   *
   * @param {WavesurferParams} params Wavesurfer parameters
   */
  function MediaElement(params) {
    var _this;

    _classCallCheck(this, MediaElement);

    _this = _super.call(this, params);
    /** @private */

    _this.params = params;
    /**
     * Initially a dummy media element to catch errors. Once `_load` is
     * called, this will contain the actual `HTMLMediaElement`.
     * @private
     */

    _this.media = {
      currentTime: 0,
      duration: 0,
      paused: true,
      playbackRate: 1,
      play: function play() {},
      pause: function pause() {},
      volume: 0
    };
    /** @private */

    _this.mediaType = params.mediaType.toLowerCase();
    /** @private */

    _this.elementPosition = params.elementPosition;
    /** @private */

    _this.peaks = null;
    /** @private */

    _this.playbackRate = 1;
    /** @private */

    _this.volume = 1;
    /** @private */

    _this.isMuted = false;
    /** @private */

    _this.buffer = null;
    /** @private */

    _this.onPlayEnd = null;
    /** @private */

    _this.mediaListeners = {};
    return _this;
  }
  /**
   * Initialise the backend, called in `wavesurfer.createBackend()`
   */


  _createClass(MediaElement, [{
    key: "init",
    value: function init() {
      this.setPlaybackRate(this.params.audioRate);
      this.createTimer();
    }
    /**
     * Attach event listeners to media element.
     */

  }, {
    key: "_setupMediaListeners",
    value: function _setupMediaListeners() {
      var _this2 = this;

      this.mediaListeners.error = function () {
        _this2.fireEvent('error', 'Error loading media element');
      };

      this.mediaListeners.canplay = function () {
        _this2.fireEvent('canplay');
      };

      this.mediaListeners.ended = function () {
        _this2.fireEvent('finish');
      }; // listen to and relay play, pause and seeked events to enable
      // playback control from the external media element


      this.mediaListeners.play = function () {
        _this2.fireEvent('play');
      };

      this.mediaListeners.pause = function () {
        _this2.fireEvent('pause');
      };

      this.mediaListeners.seeked = function (event) {
        _this2.fireEvent('seek');
      };

      this.mediaListeners.volumechange = function (event) {
        _this2.isMuted = _this2.media.muted;

        if (_this2.isMuted) {
          _this2.volume = 0;
        } else {
          _this2.volume = _this2.media.volume;
        }

        _this2.fireEvent('volume');
      }; // reset event listeners


      Object.keys(this.mediaListeners).forEach(function (id) {
        _this2.media.removeEventListener(id, _this2.mediaListeners[id]);

        _this2.media.addEventListener(id, _this2.mediaListeners[id]);
      });
    }
    /**
     * Create a timer to provide a more precise `audioprocess` event.
     */

  }, {
    key: "createTimer",
    value: function createTimer() {
      var _this3 = this;

      var onAudioProcess = function onAudioProcess() {
        if (_this3.isPaused()) {
          return;
        }

        _this3.fireEvent('audioprocess', _this3.getCurrentTime()); // Call again in the next frame


        util.frame(onAudioProcess)();
      };

      this.on('play', onAudioProcess); // Update the progress one more time to prevent it from being stuck in
      // case of lower framerates

      this.on('pause', function () {
        _this3.fireEvent('audioprocess', _this3.getCurrentTime());
      });
    }
    /**
     * Create media element with url as its source,
     * and append to container element.
     *
     * @param {string} url Path to media file
     * @param {HTMLElement} container HTML element
     * @param {number[]|Number.<Array[]>} peaks Array of peak data
     * @param {string} preload HTML 5 preload attribute value
     * @throws Will throw an error if the `url` argument is not a valid media
     * element.
     */

  }, {
    key: "load",
    value: function load(url, container, peaks, preload) {
      var media = document.createElement(this.mediaType);
      media.controls = this.params.mediaControls;
      media.autoplay = this.params.autoplay || false;
      media.preload = preload == null ? 'auto' : preload;
      media.src = url;
      media.style.width = '100%';
      var prevMedia = container.querySelector(this.mediaType);

      if (prevMedia) {
        container.removeChild(prevMedia);
      }

      container.appendChild(media);

      this._load(media, peaks, preload);
    }
    /**
     * Load existing media element.
     *
     * @param {HTMLMediaElement} elt HTML5 Audio or Video element
     * @param {number[]|Number.<Array[]>} peaks Array of peak data
     */

  }, {
    key: "loadElt",
    value: function loadElt(elt, peaks) {
      elt.controls = this.params.mediaControls;
      elt.autoplay = this.params.autoplay || false;

      this._load(elt, peaks, elt.preload);
    }
    /**
     * Method called by both `load` (from url)
     * and `loadElt` (existing media element) methods.
     *
     * @param {HTMLMediaElement} media HTML5 Audio or Video element
     * @param {number[]|Number.<Array[]>} peaks Array of peak data
     * @param {string} preload HTML 5 preload attribute value
     * @throws Will throw an error if the `media` argument is not a valid media
     * element.
     * @private
     */

  }, {
    key: "_load",
    value: function _load(media, peaks, preload) {
      // verify media element is valid
      if (!(media instanceof HTMLMediaElement) || typeof media.addEventListener === 'undefined') {
        throw new Error('media parameter is not a valid media element');
      } // load must be called manually on iOS, otherwise peaks won't draw
      // until a user interaction triggers load --> 'ready' event
      //
      // note that we avoid calling media.load here when given peaks and preload == 'none'
      // as this almost always triggers some browser fetch of the media.


      if (typeof media.load == 'function' && !(peaks && preload == 'none')) {
        // Resets the media element and restarts the media resource. Any
        // pending events are discarded. How much media data is fetched is
        // still affected by the preload attribute.
        media.load();
      }

      this.media = media;

      this._setupMediaListeners();

      this.peaks = peaks;
      this.onPlayEnd = null;
      this.buffer = null;
      this.isMuted = media.muted;
      this.setPlaybackRate(this.playbackRate);
      this.setVolume(this.volume);
    }
    /**
     * Used by `wavesurfer.isPlaying()` and `wavesurfer.playPause()`
     *
     * @return {boolean} Media paused or not
     */

  }, {
    key: "isPaused",
    value: function isPaused() {
      return !this.media || this.media.paused;
    }
    /**
     * Used by `wavesurfer.getDuration()`
     *
     * @return {number} Duration
     */

  }, {
    key: "getDuration",
    value: function getDuration() {
      if (this.explicitDuration) {
        return this.explicitDuration;
      }

      var duration = (this.buffer || this.media).duration;

      if (duration >= Infinity) {
        // streaming audio
        duration = this.media.seekable.end(0);
      }

      return duration;
    }
    /**
     * Returns the current time in seconds relative to the audio-clip's
     * duration.
     *
     * @return {number} Current time
     */

  }, {
    key: "getCurrentTime",
    value: function getCurrentTime() {
      return this.media && this.media.currentTime;
    }
    /**
     * Get the position from 0 to 1
     *
     * @return {number} Current position
     */

  }, {
    key: "getPlayedPercents",
    value: function getPlayedPercents() {
      return this.getCurrentTime() / this.getDuration() || 0;
    }
    /**
     * Get the audio source playback rate.
     *
     * @return {number} Playback rate
     */

  }, {
    key: "getPlaybackRate",
    value: function getPlaybackRate() {
      return this.playbackRate || this.media.playbackRate;
    }
    /**
     * Set the audio source playback rate.
     *
     * @param {number} value Playback rate
     */

  }, {
    key: "setPlaybackRate",
    value: function setPlaybackRate(value) {
      this.playbackRate = value || 1;
      this.media.playbackRate = this.playbackRate;
    }
    /**
     * Used by `wavesurfer.seekTo()`
     *
     * @param {number} start Position to start at in seconds
     */

  }, {
    key: "seekTo",
    value: function seekTo(start) {
      if (start != null) {
        this.media.currentTime = start;
      }

      this.clearPlayEnd();
    }
    /**
     * Plays the loaded audio region.
     *
     * @param {number} start Start offset in seconds, relative to the beginning
     * of a clip.
     * @param {number} end When to stop, relative to the beginning of a clip.
     * @emits MediaElement#play
     * @return {Promise} Result
     */

  }, {
    key: "play",
    value: function play(start, end) {
      this.seekTo(start);
      var promise = this.media.play();
      end && this.setPlayEnd(end);
      return promise;
    }
    /**
     * Pauses the loaded audio.
     *
     * @emits MediaElement#pause
     * @return {Promise} Result
     */

  }, {
    key: "pause",
    value: function pause() {
      var promise;

      if (this.media) {
        promise = this.media.pause();
      }

      this.clearPlayEnd();
      return promise;
    }
    /**
     * Set the play end
     *
     * @param {number} end Where to end
     */

  }, {
    key: "setPlayEnd",
    value: function setPlayEnd(end) {
      var _this4 = this;

      this.clearPlayEnd();

      this._onPlayEnd = function (time) {
        if (time >= end) {
          _this4.pause();

          _this4.seekTo(end);
        }
      };

      this.on('audioprocess', this._onPlayEnd);
    }
    /** @private */

  }, {
    key: "clearPlayEnd",
    value: function clearPlayEnd() {
      if (this._onPlayEnd) {
        this.un('audioprocess', this._onPlayEnd);
        this._onPlayEnd = null;
      }
    }
    /**
     * Compute the max and min value of the waveform when broken into
     * <length> subranges.
     *
     * @param {number} length How many subranges to break the waveform into.
     * @param {number} first First sample in the required range.
     * @param {number} last Last sample in the required range.
     * @return {number[]|Number.<Array[]>} Array of 2*<length> peaks or array of
     * arrays of peaks consisting of (max, min) values for each subrange.
     */

  }, {
    key: "getPeaks",
    value: function getPeaks(length, first, last) {
      if (this.buffer) {
        return _get(_getPrototypeOf(MediaElement.prototype), "getPeaks", this).call(this, length, first, last);
      }

      return this.peaks || [];
    }
    /**
     * Set the sink id for the media player
     *
     * @param {string} deviceId String value representing audio device id.
     * @returns {Promise} A Promise that resolves to `undefined` when there
     * are no errors.
     */

  }, {
    key: "setSinkId",
    value: function setSinkId(deviceId) {
      if (deviceId) {
        if (!this.media.setSinkId) {
          return Promise.reject(new Error('setSinkId is not supported in your browser'));
        }

        return this.media.setSinkId(deviceId);
      }

      return Promise.reject(new Error('Invalid deviceId: ' + deviceId));
    }
    /**
     * Get the current volume
     *
     * @return {number} value A floating point value between 0 and 1.
     */

  }, {
    key: "getVolume",
    value: function getVolume() {
      return this.volume;
    }
    /**
     * Set the audio volume
     *
     * @param {number} value A floating point value between 0 and 1.
     */

  }, {
    key: "setVolume",
    value: function setVolume(value) {
      this.volume = value; // no need to change when it's already at that volume

      if (this.media.volume !== this.volume) {
        this.media.volume = this.volume;
      }
    }
    /**
     * Enable or disable muted audio
     *
     * @since 4.0.0
     * @param {boolean} muted Specify `true` to mute audio.
     */

  }, {
    key: "setMute",
    value: function setMute(muted) {
      // This causes a volume change to be emitted too through the
      // volumechange event listener.
      this.isMuted = this.media.muted = muted;
    }
    /**
     * This is called when wavesurfer is destroyed
     *
     */

  }, {
    key: "destroy",
    value: function destroy() {
      var _this5 = this;

      this.pause();
      this.unAll();
      this.destroyed = true; // cleanup media event listeners

      Object.keys(this.mediaListeners).forEach(function (id) {
        if (_this5.media) {
          _this5.media.removeEventListener(id, _this5.mediaListeners[id]);
        }
      });

      if (this.params.removeMediaElementOnDestroy && this.media && this.media.parentNode) {
        this.media.parentNode.removeChild(this.media);
      }

      this.media = null;
    }
  }]);

  return MediaElement;
}(_webaudio.default);

exports.default = MediaElement;
module.exports = exports.default;

/***/ }),

/***/ "./src/peakcache.js":
/*!**************************!*\
  !*** ./src/peakcache.js ***!
  \**************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = void 0;

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

/**
 * Caches the decoded peaks data to improve rendering speed for large audio
 *
 * Is used if the option parameter `partialRender` is set to `true`
 */
var PeakCache = /*#__PURE__*/function () {
  /**
   * Instantiate cache
   */
  function PeakCache() {
    _classCallCheck(this, PeakCache);

    this.clearPeakCache();
  }
  /**
   * Empty the cache
   */


  _createClass(PeakCache, [{
    key: "clearPeakCache",
    value: function clearPeakCache() {
      /**
       * Flat array with entries that are always in pairs to mark the
       * beginning and end of each subrange.  This is a convenience so we can
       * iterate over the pairs for easy set difference operations.
       * @private
       */
      this.peakCacheRanges = [];
      /**
       * Length of the entire cachable region, used for resetting the cache
       * when this changes (zoom events, for instance).
       * @private
       */

      this.peakCacheLength = -1;
    }
    /**
     * Add a range of peaks to the cache
     *
     * @param {number} length The length of the range
     * @param {number} start The x offset of the start of the range
     * @param {number} end The x offset of the end of the range
     * @return {Number.<Array[]>} Array with arrays of numbers
     */

  }, {
    key: "addRangeToPeakCache",
    value: function addRangeToPeakCache(length, start, end) {
      if (length != this.peakCacheLength) {
        this.clearPeakCache();
        this.peakCacheLength = length;
      } // Return ranges that weren't in the cache before the call.


      var uncachedRanges = [];
      var i = 0; // Skip ranges before the current start.

      while (i < this.peakCacheRanges.length && this.peakCacheRanges[i] < start) {
        i++;
      } // If |i| is even, |start| falls after an existing range.  Otherwise,
      // |start| falls between an existing range, and the uncached region
      // starts when we encounter the next node in |peakCacheRanges| or
      // |end|, whichever comes first.


      if (i % 2 == 0) {
        uncachedRanges.push(start);
      }

      while (i < this.peakCacheRanges.length && this.peakCacheRanges[i] <= end) {
        uncachedRanges.push(this.peakCacheRanges[i]);
        i++;
      } // If |i| is even, |end| is after all existing ranges.


      if (i % 2 == 0) {
        uncachedRanges.push(end);
      } // Filter out the 0-length ranges.


      uncachedRanges = uncachedRanges.filter(function (item, pos, arr) {
        if (pos == 0) {
          return item != arr[pos + 1];
        } else if (pos == arr.length - 1) {
          return item != arr[pos - 1];
        }

        return item != arr[pos - 1] && item != arr[pos + 1];
      }); // Merge the two ranges together, uncachedRanges will either contain
      // wholly new points, or duplicates of points in peakCacheRanges.  If
      // duplicates are detected, remove both and extend the range.

      this.peakCacheRanges = this.peakCacheRanges.concat(uncachedRanges);
      this.peakCacheRanges = this.peakCacheRanges.sort(function (a, b) {
        return a - b;
      }).filter(function (item, pos, arr) {
        if (pos == 0) {
          return item != arr[pos + 1];
        } else if (pos == arr.length - 1) {
          return item != arr[pos - 1];
        }

        return item != arr[pos - 1] && item != arr[pos + 1];
      }); // Push the uncached ranges into an array of arrays for ease of
      // iteration in the functions that call this.

      var uncachedRangePairs = [];

      for (i = 0; i < uncachedRanges.length; i += 2) {
        uncachedRangePairs.push([uncachedRanges[i], uncachedRanges[i + 1]]);
      }

      return uncachedRangePairs;
    }
    /**
     * For testing
     *
     * @return {Number.<Array[]>} Array with arrays of numbers
     */

  }, {
    key: "getCacheRanges",
    value: function getCacheRanges() {
      var peakCacheRangePairs = [];
      var i;

      for (i = 0; i < this.peakCacheRanges.length; i += 2) {
        peakCacheRangePairs.push([this.peakCacheRanges[i], this.peakCacheRanges[i + 1]]);
      }

      return peakCacheRangePairs;
    }
  }]);

  return PeakCache;
}();

exports.default = PeakCache;
module.exports = exports.default;

/***/ }),

/***/ "./src/util/absMax.js":
/*!****************************!*\
  !*** ./src/util/absMax.js ***!
  \****************************/
/***/ ((module, exports, __nested_webpack_require_87138__) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = absMax;

var _max = _interopRequireDefault(__nested_webpack_require_87138__(/*! ./max */ "./src/util/max.js"));

var _min = _interopRequireDefault(__nested_webpack_require_87138__(/*! ./min */ "./src/util/min.js"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Get the largest absolute value in an array
 *
 * @param   {Array} values Array of numbers
 * @returns {Number} Largest number found
 * @example console.log(max([-3, 2, 1]), max([-3, 2, 4])); // logs 3 4
 * @since 4.3.0
 */
function absMax(values) {
  var max = (0, _max.default)(values);
  var min = (0, _min.default)(values);
  return -min > max ? -min : max;
}

module.exports = exports.default;

/***/ }),

/***/ "./src/util/clamp.js":
/*!***************************!*\
  !*** ./src/util/clamp.js ***!
  \***************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = clamp;

/**
 * Returns a number limited to the given range.
 *
 * @param {number} val The number to be limited to a range
 * @param {number} min The lower boundary of the limit range
 * @param {number} max The upper boundary of the limit range
 * @returns {number} A number in the range [min, max]
 */
function clamp(val, min, max) {
  return Math.min(Math.max(min, val), max);
}

module.exports = exports.default;

/***/ }),

/***/ "./src/util/fetch.js":
/*!***************************!*\
  !*** ./src/util/fetch.js ***!
  \***************************/
/***/ ((module, exports, __nested_webpack_require_88816__) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = fetchFile;

var _observer = _interopRequireDefault(__nested_webpack_require_88816__(/*! ./observer */ "./src/util/observer.js"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var ProgressHandler = /*#__PURE__*/function () {
  /**
   * Instantiate ProgressHandler
   *
   * @param {Observer} instance The `fetchFile` observer instance.
   * @param {Number} contentLength Content length.
   * @param {Response} response Response object.
   */
  function ProgressHandler(instance, contentLength, response) {
    _classCallCheck(this, ProgressHandler);

    this.instance = instance;
    this.instance._reader = response.body.getReader();
    this.total = parseInt(contentLength, 10);
    this.loaded = 0;
  }
  /**
   * A method that is called once, immediately after the `ReadableStream``
   * is constructed.
   *
   * @param {ReadableStreamDefaultController} controller Controller instance
   *     used to control the stream.
   */


  _createClass(ProgressHandler, [{
    key: "start",
    value: function start(controller) {
      var _this = this;

      var read = function read() {
        // instance._reader.read() returns a promise that resolves
        // when a value has been received
        _this.instance._reader.read().then(function (_ref) {
          var done = _ref.done,
              value = _ref.value;

          // result objects contain two properties:
          // done  - true if the stream has already given you all its data.
          // value - some data. Always undefined when done is true.
          if (done) {
            // ensure onProgress called when content-length=0
            if (_this.total === 0) {
              _this.instance.onProgress.call(_this.instance, {
                loaded: _this.loaded,
                total: _this.total,
                lengthComputable: false
              });
            } // no more data needs to be consumed, close the stream


            controller.close();
            return;
          }

          _this.loaded += value.byteLength;

          _this.instance.onProgress.call(_this.instance, {
            loaded: _this.loaded,
            total: _this.total,
            lengthComputable: !(_this.total === 0)
          }); // enqueue the next data chunk into our target stream


          controller.enqueue(value);
          read();
        }).catch(function (error) {
          controller.error(error);
        });
      };

      read();
    }
  }]);

  return ProgressHandler;
}();
/**
 * Load a file using `fetch`.
 *
 * @param {object} options Request options to use. See example below.
 * @returns {Observer} Observer instance
 * @example
 * // default options
 * let options = {
 *     url: undefined,
 *     method: 'GET',
 *     mode: 'cors',
 *     credentials: 'same-origin',
 *     cache: 'default',
 *     responseType: 'json',
 *     requestHeaders: [],
 *     redirect: 'follow',
 *     referrer: 'client'
 * };
 *
 * // override some options
 * options.url = '../media/demo.wav';

 * // available types: 'arraybuffer', 'blob', 'json' or 'text'
 * options.responseType = 'arraybuffer';
 *
 * // make fetch call
 * let request = util.fetchFile(options);
 *
 * // listen for events
 * request.on('progress', e => {
 *     console.log('progress', e);
 * });
 *
 * request.on('success', data => {
 *     console.log('success!', data);
 * });
 *
 * request.on('error', e => {
 *     console.warn('fetchFile error: ', e);
 * });
 */


function fetchFile(options) {
  if (!options) {
    throw new Error('fetch options missing');
  } else if (!options.url) {
    throw new Error('fetch url missing');
  }

  var instance = new _observer.default();
  var fetchHeaders = new Headers();
  var fetchRequest = new Request(options.url); // add ability to abort

  instance.controller = new AbortController(); // check if headers have to be added

  if (options && options.requestHeaders) {
    // add custom request headers
    options.requestHeaders.forEach(function (header) {
      fetchHeaders.append(header.key, header.value);
    });
  } // parse fetch options


  var responseType = options.responseType || 'json';
  var fetchOptions = {
    method: options.method || 'GET',
    headers: fetchHeaders,
    mode: options.mode || 'cors',
    credentials: options.credentials || 'same-origin',
    cache: options.cache || 'default',
    redirect: options.redirect || 'follow',
    referrer: options.referrer || 'client',
    signal: instance.controller.signal
  };
  fetch(fetchRequest, fetchOptions).then(function (response) {
    // store response reference
    instance.response = response;
    var progressAvailable = true;

    if (!response.body) {
      // ReadableStream is not yet supported in this browser
      // see https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream
      progressAvailable = false;
    } // Server must send CORS header "Access-Control-Expose-Headers: content-length"


    var contentLength = response.headers.get('content-length');

    if (contentLength === null) {
      // Content-Length server response header missing.
      // Don't evaluate download progress if we can't compare against a total size
      // see https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Access-Control-Expose-Headers
      progressAvailable = false;
    }

    if (!progressAvailable) {
      // not able to check download progress so skip it
      return response;
    } // fire progress event when during load


    instance.onProgress = function (e) {
      instance.fireEvent('progress', e);
    };

    return new Response(new ReadableStream(new ProgressHandler(instance, contentLength, response)), fetchOptions);
  }).then(function (response) {
    var errMsg;

    if (response.ok) {
      switch (responseType) {
        case 'arraybuffer':
          return response.arrayBuffer();

        case 'json':
          return response.json();

        case 'blob':
          return response.blob();

        case 'text':
          return response.text();

        default:
          errMsg = 'Unknown responseType: ' + responseType;
          break;
      }
    }

    if (!errMsg) {
      errMsg = 'HTTP error status: ' + response.status;
    }

    throw new Error(errMsg);
  }).then(function (response) {
    instance.fireEvent('success', response);
  }).catch(function (error) {
    instance.fireEvent('error', error);
  }); // return the fetch request

  instance.fetchRequest = fetchRequest;
  return instance;
}

module.exports = exports.default;

/***/ }),

/***/ "./src/util/frame.js":
/*!***************************!*\
  !*** ./src/util/frame.js ***!
  \***************************/
/***/ ((module, exports, __nested_webpack_require_96321__) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = frame;

var _requestAnimationFrame = _interopRequireDefault(__nested_webpack_require_96321__(/*! ./request-animation-frame */ "./src/util/request-animation-frame.js"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Create a function which will be called at the next requestAnimationFrame
 * cycle
 *
 * @param {function} func The function to call
 *
 * @return {func} The function wrapped within a requestAnimationFrame
 */
function frame(func) {
  return function () {
    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    return (0, _requestAnimationFrame.default)(function () {
      return func.apply(void 0, args);
    });
  };
}

module.exports = exports.default;

/***/ }),

/***/ "./src/util/get-id.js":
/*!****************************!*\
  !*** ./src/util/get-id.js ***!
  \****************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = getId;

/**
 * Get a random prefixed ID
 *
 * @param {String} prefix Prefix to use. Default is `'wavesurfer_'`.
 * @returns {String} Random prefixed ID
 * @example
 * console.log(getId()); // logs 'wavesurfer_b5pors4ru6g'
 *
 * let prefix = 'foo-';
 * console.log(getId(prefix)); // logs 'foo-b5pors4ru6g'
 */
function getId(prefix) {
  if (prefix === undefined) {
    prefix = 'wavesurfer_';
  }

  return prefix + Math.random().toString(32).substring(2);
}

module.exports = exports.default;

/***/ }),

/***/ "./src/util/index.js":
/*!***************************!*\
  !*** ./src/util/index.js ***!
  \***************************/
/***/ ((__unused_webpack_module, exports, __nested_webpack_require_98203__) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
Object.defineProperty(exports, "getId", ({
  enumerable: true,
  get: function get() {
    return _getId.default;
  }
}));
Object.defineProperty(exports, "max", ({
  enumerable: true,
  get: function get() {
    return _max.default;
  }
}));
Object.defineProperty(exports, "min", ({
  enumerable: true,
  get: function get() {
    return _min.default;
  }
}));
Object.defineProperty(exports, "absMax", ({
  enumerable: true,
  get: function get() {
    return _absMax.default;
  }
}));
Object.defineProperty(exports, "Observer", ({
  enumerable: true,
  get: function get() {
    return _observer.default;
  }
}));
Object.defineProperty(exports, "style", ({
  enumerable: true,
  get: function get() {
    return _style.default;
  }
}));
Object.defineProperty(exports, "requestAnimationFrame", ({
  enumerable: true,
  get: function get() {
    return _requestAnimationFrame.default;
  }
}));
Object.defineProperty(exports, "frame", ({
  enumerable: true,
  get: function get() {
    return _frame.default;
  }
}));
Object.defineProperty(exports, "debounce", ({
  enumerable: true,
  get: function get() {
    return _debounce.default;
  }
}));
Object.defineProperty(exports, "preventClick", ({
  enumerable: true,
  get: function get() {
    return _preventClick.default;
  }
}));
Object.defineProperty(exports, "fetchFile", ({
  enumerable: true,
  get: function get() {
    return _fetch.default;
  }
}));
Object.defineProperty(exports, "clamp", ({
  enumerable: true,
  get: function get() {
    return _clamp.default;
  }
}));
Object.defineProperty(exports, "withOrientation", ({
  enumerable: true,
  get: function get() {
    return _orientation.default;
  }
}));
Object.defineProperty(exports, "ignoreSilenceMode", ({
  enumerable: true,
  get: function get() {
    return _silenceMode.default;
  }
}));

var _getId = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./get-id */ "./src/util/get-id.js"));

var _max = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./max */ "./src/util/max.js"));

var _min = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./min */ "./src/util/min.js"));

var _absMax = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./absMax */ "./src/util/absMax.js"));

var _observer = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./observer */ "./src/util/observer.js"));

var _style = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./style */ "./src/util/style.js"));

var _requestAnimationFrame = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./request-animation-frame */ "./src/util/request-animation-frame.js"));

var _frame = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./frame */ "./src/util/frame.js"));

var _debounce = _interopRequireDefault(__nested_webpack_require_98203__(/*! debounce */ "./node_modules/debounce/index.js"));

var _preventClick = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./prevent-click */ "./src/util/prevent-click.js"));

var _fetch = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./fetch */ "./src/util/fetch.js"));

var _clamp = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./clamp */ "./src/util/clamp.js"));

var _orientation = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./orientation */ "./src/util/orientation.js"));

var _silenceMode = _interopRequireDefault(__nested_webpack_require_98203__(/*! ./silence-mode */ "./src/util/silence-mode.js"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/***/ }),

/***/ "./src/util/max.js":
/*!*************************!*\
  !*** ./src/util/max.js ***!
  \*************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = max;

/**
 * Get the largest value
 *
 * @param   {Array} values Array of numbers
 * @returns {Number} Largest number found
 * @example console.log(max([1, 2, 3])); // logs 3
 */
function max(values) {
  var largest = -Infinity;
  Object.keys(values).forEach(function (i) {
    if (values[i] > largest) {
      largest = values[i];
    }
  });
  return largest;
}

module.exports = exports.default;

/***/ }),

/***/ "./src/util/min.js":
/*!*************************!*\
  !*** ./src/util/min.js ***!
  \*************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = min;

/**
 * Get the smallest value
 *
 * @param   {Array} values Array of numbers
 * @returns {Number} Smallest number found
 * @example console.log(min([1, 2, 3])); // logs 1
 */
function min(values) {
  var smallest = Number(Infinity);
  Object.keys(values).forEach(function (i) {
    if (values[i] < smallest) {
      smallest = values[i];
    }
  });
  return smallest;
}

module.exports = exports.default;

/***/ }),

/***/ "./src/util/observer.js":
/*!******************************!*\
  !*** ./src/util/observer.js ***!
  \******************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = void 0;

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

/**
 * @typedef {Object} ListenerDescriptor
 * @property {string} name The name of the event
 * @property {function} callback The callback
 * @property {function} un The function to call to remove the listener
 */

/**
 * Observer class
 */
var Observer = /*#__PURE__*/function () {
  /**
   * Instantiate Observer
   */
  function Observer() {
    _classCallCheck(this, Observer);

    /**
     * @private
     * @todo Initialise the handlers here already and remove the conditional
     * assignment in `on()`
     */
    this._disabledEventEmissions = [];
    this.handlers = null;
  }
  /**
   * Attach a handler function for an event.
   *
   * @param {string} event Name of the event to listen to
   * @param {function} fn The callback to trigger when the event is fired
   * @return {ListenerDescriptor} The event descriptor
   */


  _createClass(Observer, [{
    key: "on",
    value: function on(event, fn) {
      var _this = this;

      if (!this.handlers) {
        this.handlers = {};
      }

      var handlers = this.handlers[event];

      if (!handlers) {
        handlers = this.handlers[event] = [];
      }

      handlers.push(fn); // Return an event descriptor

      return {
        name: event,
        callback: fn,
        un: function un(e, fn) {
          return _this.un(e, fn);
        }
      };
    }
    /**
     * Remove an event handler.
     *
     * @param {string} event Name of the event the listener that should be
     * removed listens to
     * @param {function} fn The callback that should be removed
     */

  }, {
    key: "un",
    value: function un(event, fn) {
      if (!this.handlers) {
        return;
      }

      var handlers = this.handlers[event];
      var i;

      if (handlers) {
        if (fn) {
          for (i = handlers.length - 1; i >= 0; i--) {
            if (handlers[i] == fn) {
              handlers.splice(i, 1);
            }
          }
        } else {
          handlers.length = 0;
        }
      }
    }
    /**
     * Remove all event handlers.
     */

  }, {
    key: "unAll",
    value: function unAll() {
      this.handlers = null;
    }
    /**
     * Attach a handler to an event. The handler is executed at most once per
     * event type.
     *
     * @param {string} event The event to listen to
     * @param {function} handler The callback that is only to be called once
     * @return {ListenerDescriptor} The event descriptor
     */

  }, {
    key: "once",
    value: function once(event, handler) {
      var _this2 = this;

      var fn = function fn() {
        for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }

        /*  eslint-disable no-invalid-this */
        handler.apply(_this2, args);
        /*  eslint-enable no-invalid-this */

        setTimeout(function () {
          _this2.un(event, fn);
        }, 0);
      };

      return this.on(event, fn);
    }
    /**
     * Disable firing a list of events by name. When specified, event handlers for any event type
     * passed in here will not be called.
     *
     * @since 4.0.0
     * @param {string[]} eventNames an array of event names to disable emissions for
     * @example
     * // disable seek and interaction events
     * wavesurfer.setDisabledEventEmissions(['seek', 'interaction']);
     */

  }, {
    key: "setDisabledEventEmissions",
    value: function setDisabledEventEmissions(eventNames) {
      this._disabledEventEmissions = eventNames;
    }
    /**
     * plugins borrow part of this class without calling the constructor,
     * so we have to be careful about _disabledEventEmissions
     */

  }, {
    key: "_isDisabledEventEmission",
    value: function _isDisabledEventEmission(event) {
      return this._disabledEventEmissions && this._disabledEventEmissions.includes(event);
    }
    /**
     * Manually fire an event
     *
     * @param {string} event The event to fire manually
     * @param {...any} args The arguments with which to call the listeners
     */

  }, {
    key: "fireEvent",
    value: function fireEvent(event) {
      for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
        args[_key2 - 1] = arguments[_key2];
      }

      if (!this.handlers || this._isDisabledEventEmission(event)) {
        return;
      }

      var handlers = this.handlers[event];
      handlers && handlers.forEach(function (fn) {
        fn.apply(void 0, args);
      });
    }
  }]);

  return Observer;
}();

exports.default = Observer;
module.exports = exports.default;

/***/ }),

/***/ "./src/util/orientation.js":
/*!*********************************!*\
  !*** ./src/util/orientation.js ***!
  \*********************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = withOrientation;
var verticalPropMap = {
  width: 'height',
  height: 'width',
  overflowX: 'overflowY',
  overflowY: 'overflowX',
  clientWidth: 'clientHeight',
  clientHeight: 'clientWidth',
  clientX: 'clientY',
  clientY: 'clientX',
  scrollWidth: 'scrollHeight',
  scrollLeft: 'scrollTop',
  offsetLeft: 'offsetTop',
  offsetTop: 'offsetLeft',
  offsetHeight: 'offsetWidth',
  offsetWidth: 'offsetHeight',
  left: 'top',
  right: 'bottom',
  top: 'left',
  bottom: 'right',
  borderRightStyle: 'borderBottomStyle',
  borderRightWidth: 'borderBottomWidth',
  borderRightColor: 'borderBottomColor'
};
/**
 * Convert a horizontally-oriented property name to a vertical one.
 *
 * @param {string} prop A property name
 * @param {bool} vertical Whether the element is oriented vertically
 * @returns {string} prop, converted appropriately
 */

function mapProp(prop, vertical) {
  if (Object.prototype.hasOwnProperty.call(verticalPropMap, prop)) {
    return vertical ? verticalPropMap[prop] : prop;
  } else {
    return prop;
  }
}

var isProxy = Symbol("isProxy");
/**
 * Returns an appropriately oriented object based on vertical.
 * If vertical is true, attribute getting and setting will be mapped through
 * verticalPropMap, so that e.g. getting the object's .width will give its
 * .height instead.
 * Certain methods of an oriented object will return oriented objects as well.
 * Oriented objects can't be added to the DOM directly since they are Proxy objects
 * and thus fail typechecks. Use domElement to get the actual element for this.
 *
 * @param {object} target The object to be wrapped and oriented
 * @param {bool} vertical Whether the element is oriented vertically
 * @returns {Proxy} An oriented object with attr translation via verticalAttrMap
 * @since 5.0.0
 */

function withOrientation(target, vertical) {
  if (target[isProxy]) {
    return target;
  } else {
    return new Proxy(target, {
      get: function get(obj, prop, receiver) {
        if (prop === isProxy) {
          return true;
        } else if (prop === 'domElement') {
          return obj;
        } else if (prop === 'style') {
          return withOrientation(obj.style, vertical);
        } else if (prop === 'canvas') {
          return withOrientation(obj.canvas, vertical);
        } else if (prop === 'getBoundingClientRect') {
          return function () {
            return withOrientation(obj.getBoundingClientRect.apply(obj, arguments), vertical);
          };
        } else if (prop === 'getContext') {
          return function () {
            return withOrientation(obj.getContext.apply(obj, arguments), vertical);
          };
        } else {
          var value = obj[mapProp(prop, vertical)];
          return typeof value == 'function' ? value.bind(obj) : value;
        }
      },
      set: function set(obj, prop, value) {
        obj[mapProp(prop, vertical)] = value;
        return true;
      }
    });
  }
}

module.exports = exports.default;

/***/ }),

/***/ "./src/util/prevent-click.js":
/*!***********************************!*\
  !*** ./src/util/prevent-click.js ***!
  \***********************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = preventClick;

/**
 * Stops propagation of click event and removes event listener
 *
 * @private
 * @param {object} event The click event
 */
function preventClickHandler(event) {
  event.stopPropagation();
  document.body.removeEventListener('click', preventClickHandler, true);
}
/**
 * Starts listening for click event and prevent propagation
 *
 * @param {object} values Values
 */


function preventClick(values) {
  document.body.addEventListener('click', preventClickHandler, true);
}

module.exports = exports.default;

/***/ }),

/***/ "./src/util/request-animation-frame.js":
/*!*********************************************!*\
  !*** ./src/util/request-animation-frame.js ***!
  \*********************************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = void 0;

/* eslint-disable valid-jsdoc */

/**
 * Returns the `requestAnimationFrame` function for the browser, or a shim with
 * `setTimeout` if the function is not found
 *
 * @return {function} Available `requestAnimationFrame` function for the browser
 */
var _default = (window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback, element) {
  return setTimeout(callback, 1000 / 60);
}).bind(window);

exports.default = _default;
module.exports = exports.default;

/***/ }),

/***/ "./src/util/silence-mode.js":
/*!**********************************!*\
  !*** ./src/util/silence-mode.js ***!
  \**********************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = ignoreSilenceMode;

/**
 * Ignores device silence mode when using the `WebAudio` backend.
 *
 * Many mobile devices contain a hardware button to mute the ringtone for incoming
 * calls and messages. Unfortunately, on some platforms like iOS, this also mutes
 * wavesurfer's audio when using the `WebAudio` backend. This function creates a
 * temporary `<audio>` element that makes sure the WebAudio backend keeps playing
 * when muting the device ringer.
 *
 * @since 5.2.0
 */
function ignoreSilenceMode() {
  // Set the src to a short bit of url encoded as a silent mp3
  // NOTE The silence MP3 must be high quality, when web audio sounds are played
  // in parallel the web audio sound is mixed to match the bitrate of the html sound
  // 0.01 seconds of silence VBR220-260 Joint Stereo 859B
  var audioData = "data:audio/mpeg;base64,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"; // disable iOS Airplay (setting the attribute in js doesn't work)

  var tmp = document.createElement("div");
  tmp.innerHTML = '<audio x-webkit-airplay="deny"></audio>';
  var audioSilentMode = tmp.children.item(0);
  audioSilentMode.src = audioData;
  audioSilentMode.preload = "auto";
  audioSilentMode.type = "audio/mpeg";
  audioSilentMode.disableRemotePlayback = true; // play

  audioSilentMode.play(); // cleanup

  audioSilentMode.remove();
  tmp.remove();
}

module.exports = exports.default;

/***/ }),

/***/ "./src/util/style.js":
/*!***************************!*\
  !*** ./src/util/style.js ***!
  \***************************/
/***/ ((module, exports) => {

"use strict";


Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = style;

/**
 * Apply a map of styles to an element
 *
 * @param {HTMLElement} el The element that the styles will be applied to
 * @param {Object} styles The map of propName: attribute, both are used as-is
 *
 * @return {HTMLElement} el
 */
function style(el, styles) {
  Object.keys(styles).forEach(function (prop) {
    if (el.style[prop] !== styles[prop]) {
      el.style[prop] = styles[prop];
    }
  });
  return el;
}

module.exports = exports.default;

/***/ }),

/***/ "./src/wavesurfer.js":
/*!***************************!*\
  !*** ./src/wavesurfer.js ***!
  \***************************/
/***/ ((module, exports, __nested_webpack_require_117085__) => {

"use strict";


function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = void 0;

var util = _interopRequireWildcard(__nested_webpack_require_117085__(/*! ./util */ "./src/util/index.js"));

var _drawer = _interopRequireDefault(__nested_webpack_require_117085__(/*! ./drawer.multicanvas */ "./src/drawer.multicanvas.js"));

var _webaudio = _interopRequireDefault(__nested_webpack_require_117085__(/*! ./webaudio */ "./src/webaudio.js"));

var _mediaelement = _interopRequireDefault(__nested_webpack_require_117085__(/*! ./mediaelement */ "./src/mediaelement.js"));

var _peakcache = _interopRequireDefault(__nested_webpack_require_117085__(/*! ./peakcache */ "./src/peakcache.js"));

var _mediaelementWebaudio = _interopRequireDefault(__nested_webpack_require_117085__(/*! ./mediaelement-webaudio */ "./src/mediaelement-webaudio.js"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

/*
 * This work is licensed under a BSD-3-Clause License.
 */

/** @external {HTMLElement} https://developer.mozilla.org/en/docs/Web/API/HTMLElement */

/** @external {OfflineAudioContext} https://developer.mozilla.org/en-US/docs/Web/API/OfflineAudioContext */

/** @external {File} https://developer.mozilla.org/en-US/docs/Web/API/File */

/** @external {Blob} https://developer.mozilla.org/en-US/docs/Web/API/Blob */

/** @external {CanvasRenderingContext2D} https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D */

/** @external {MediaStreamConstraints} https://developer.mozilla.org/en-US/docs/Web/API/MediaStreamConstraints */

/** @external {AudioNode} https://developer.mozilla.org/de/docs/Web/API/AudioNode */

/**
 * @typedef {Object} WavesurferParams
 * @property {AudioContext} audioContext=null Use your own previously
 * initialized AudioContext or leave blank.
 * @property {number} audioRate=1 Speed at which to play audio. Lower number is
 * slower.
 * @property {ScriptProcessorNode} audioScriptProcessor=null Use your own previously
 * initialized ScriptProcessorNode or leave blank.
 * @property {boolean} autoCenter=true If a scrollbar is present, center the
 * waveform on current progress
 * @property {number} autoCenterRate=5 If autoCenter is active, rate at which the
 * waveform is centered
 * @property {boolean} autoCenterImmediately=false If autoCenter is active, immediately
 * center waveform on current progress
 * @property {string} backend='WebAudio' `'WebAudio'|'MediaElement'|'MediaElementWebAudio'` In most cases
 * you don't have to set this manually. MediaElement is a fallback for unsupported browsers.
 * MediaElementWebAudio allows to use WebAudio API also with big audio files, loading audio like with
 * MediaElement backend (HTML5 audio tag). You have to use the same methods of MediaElement backend for loading and
 * playback, giving also peaks, so the audio data are not decoded. In this way you can use WebAudio features, like filters,
 * also with audio with big duration. For example:
 * ` wavesurfer.load(url | HTMLMediaElement, peaks, preload, duration);
 *   wavesurfer.play();
 *   wavesurfer.setFilter(customFilter);
 * `
 * @property {string} backgroundColor=null Change background color of the
 * waveform container.
 * @property {number} barHeight=1 The height of the wave bars.
 * @property {number} barRadius=0 The radius of the wave bars. Makes bars rounded
 * @property {number} barGap=null The optional spacing between bars of the wave,
 * if not provided will be calculated in legacy format.
 * @property {number} barWidth=null Draw the waveform using bars.
 * @property {number} barMinHeight=null If specified, draw at least a bar of this height,
 * eliminating waveform gaps
 * @property {boolean} closeAudioContext=false Close and nullify all audio
 * contexts when the destroy method is called.
 * @property {!string|HTMLElement} container CSS selector or HTML element where
 * the waveform should be drawn. This is the only required parameter.
 * @property {string} cursorColor='#333' The fill color of the cursor indicating
 * the playhead position.
 * @property {number} cursorWidth=1 Measured in pixels.
 * @property {object} drawingContextAttributes={desynchronized: false} Drawing context
 * attributes.
 * @property {number} duration=null Optional audio length so pre-rendered peaks
 * can be display immediately for example.
 * @property {boolean} fillParent=true Whether to fill the entire container or
 * draw only according to `minPxPerSec`.
 * @property {boolean} forceDecode=false Force decoding of audio using web audio
 * when zooming to get a more detailed waveform.
 * @property {number} height=128 The height of the waveform. Measured in
 * pixels.
 * @property {boolean} hideScrollbar=false Whether to hide the horizontal
 * scrollbar when one would normally be shown.
 * @property {boolean} ignoreSilenceMode=false If true, ignores device silence mode
 * when using the `WebAudio` backend.
 * @property {boolean} interact=true Whether the mouse interaction will be
 * enabled at initialization. You can switch this parameter at any time later
 * on.
 * @property {boolean} loopSelection=true (Use with regions plugin) Enable
 * looping of selected regions
 * @property {number} maxCanvasWidth=4000 Maximum width of a single canvas in
 * pixels, excluding a small overlap (2 * `pixelRatio`, rounded up to the next
 * even integer). If the waveform is longer than this value, additional canvases
 * will be used to render the waveform, which is useful for very large waveforms
 * that may be too wide for browsers to draw on a single canvas.
 * @property {boolean} mediaControls=false (Use with backend `MediaElement` or `MediaElementWebAudio`)
 * this enables the native controls for the media element
 * @property {string} mediaType='audio' (Use with backend `MediaElement` or `MediaElementWebAudio`)
 * `'audio'|'video'` ('video' only for `MediaElement`)
 * @property {number} minPxPerSec=20 Minimum number of pixels per second of
 * audio.
 * @property {boolean} normalize=false If true, normalize by the maximum peak
 * instead of 1.0.
 * @property {boolean} partialRender=false Use the PeakCache to improve
 * rendering speed of large waveforms
 * @property {number} pixelRatio=window.devicePixelRatio The pixel ratio used to
 * calculate display
 * @property {PluginDefinition[]} plugins=[] An array of plugin definitions to
 * register during instantiation, they will be directly initialised unless they
 * are added with the `deferInit` property set to true.
 * @property {string} progressColor='#555' The fill color of the part of the
 * waveform behind the cursor. When `progressColor` and `waveColor` are the same
 * the progress wave is not rendered at all.
 * @property {boolean} removeMediaElementOnDestroy=true Set to false to keep the
 * media element in the DOM when the player is destroyed. This is useful when
 * reusing an existing media element via the `loadMediaElement` method.
 * @property {Object} renderer=MultiCanvas Can be used to inject a custom
 * renderer.
 * @property {boolean|number} responsive=false If set to `true` resize the
 * waveform, when the window is resized. This is debounced with a `100ms`
 * timeout by default. If this parameter is a number it represents that timeout.
 * @property {boolean} rtl=false If set to `true`, renders waveform from
 * right-to-left.
 * @property {boolean} scrollParent=false Whether to scroll the container with a
 * lengthy waveform. Otherwise the waveform is shrunk to the container width
 * (see fillParent).
 * @property {number} skipLength=2 Number of seconds to skip with the
 * skipForward() and skipBackward() methods.
 * @property {boolean} splitChannels=false Render with separate waveforms for
 * the channels of the audio
 * @property {SplitChannelOptions} splitChannelsOptions={} Options for splitChannel rendering
 * @property {boolean} vertical=false Render the waveform vertically instead of horizontally.
 * @property {string} waveColor='#999' The fill color of the waveform after the
 * cursor.
 * @property {object} xhr={} XHR options. For example:
 * `let xhr = {
 *     cache: 'default',
 *     mode: 'cors',
 *     method: 'GET',
 *     credentials: 'same-origin',
 *     redirect: 'follow',
 *     referrer: 'client',
 *     requestHeaders: [
 *         {
 *             key: 'Authorization',
 *             value: 'my-token'
 *         }
 *     ]
 * };`
 */

/**
 * @typedef {Object} PluginDefinition
 * @desc The Object used to describe a plugin
 * @example wavesurfer.addPlugin(pluginDefinition);
 * @property {string} name The name of the plugin, the plugin instance will be
 * added as a property to the wavesurfer instance under this name
 * @property {?Object} staticProps The properties that should be added to the
 * wavesurfer instance as static properties
 * @property {?boolean} deferInit Don't initialise plugin
 * automatically
 * @property {Object} params={} The plugin parameters, they are the first parameter
 * passed to the plugin class constructor function
 * @property {PluginClass} instance The plugin instance factory, is called with
 * the dependency specified in extends. Returns the plugin class.
 */

/**
 * @typedef {Object} SplitChannelOptions
 * @desc parameters applied when splitChannels option is true
 * @property {boolean} overlay=false determines whether channels are rendered on top of each other or on separate tracks
 * @property {object} channelColors={} object describing color for each channel. Example:
 * {
 *     0: {
 *         progressColor: 'green',
 *         waveColor: 'pink'
 *     },
 *     1: {
 *         progressColor: 'orange',
 *         waveColor: 'purple'
 *     }
 * }
 * @property {number[]} filterChannels=[] indexes of channels to be hidden from rendering
 * @property {boolean} relativeNormalization=false determines whether
 * normalization is done per channel or maintains proportionality between
 * channels. Only applied when normalize and splitChannels are both true.
 * @since 4.3.0
 */

/**
 * @interface PluginClass
 *
 * @desc This is the interface which is implemented by all plugin classes. Note
 * that this only turns into an observer after being passed through
 * `wavesurfer.addPlugin`.
 *
 * @extends {Observer}
 */
var PluginClass = /*#__PURE__*/function () {
  /**
   * Construct the plugin
   *
   * @param {Object} params={} The plugin params (specific to the plugin)
   * @param {Object} ws The wavesurfer instance
   */
  function PluginClass(params, ws) {
    _classCallCheck(this, PluginClass);
  }
  /**
   * Initialise the plugin
   *
   * Start doing something. This is called by
   * `wavesurfer.initPlugin(pluginName)`
   */


  _createClass(PluginClass, [{
    key: "create",
    value:
    /**
     * Plugin definition factory
     *
     * This function must be used to create a plugin definition which can be
     * used by wavesurfer to correctly instantiate the plugin.
     *
     * It returns a `PluginDefinition` object representing the plugin.
     *
     * @param {Object} params={} The plugin params (specific to the plugin)
     */
    function create(params) {}
  }, {
    key: "init",
    value: function init() {}
    /**
     * Destroy the plugin instance
     *
     * Stop doing something. This is called by
     * `wavesurfer.destroyPlugin(pluginName)`
     */

  }, {
    key: "destroy",
    value: function destroy() {}
  }]);

  return PluginClass;
}();
/**
 * WaveSurfer core library class
 *
 * @extends {Observer}
 * @example
 * const params = {
 *   container: '#waveform',
 *   waveColor: 'violet',
 *   progressColor: 'purple'
 * };
 *
 * // initialise like this
 * const wavesurfer = WaveSurfer.create(params);
 *
 * // or like this ...
 * const wavesurfer = new WaveSurfer(params);
 * wavesurfer.init();
 *
 * // load audio file
 * wavesurfer.load('example/media/demo.wav');
 */


var WaveSurfer = /*#__PURE__*/function (_util$Observer) {
  _inherits(WaveSurfer, _util$Observer);

  var _super = _createSuper(WaveSurfer);

  /**
   * Initialise wavesurfer instance
   *
   * @param {WavesurferParams} params Instantiation options for wavesurfer
   * @example
   * const wavesurfer = new WaveSurfer(params);
   * @returns {this} Wavesurfer instance
   */
  function WaveSurfer(params) {
    var _this;

    _classCallCheck(this, WaveSurfer);

    _this = _super.call(this);
    /**
     * Extract relevant parameters (or defaults)
     * @private
     */

    _this.defaultParams = {
      audioContext: null,
      audioScriptProcessor: null,
      audioRate: 1,
      autoCenter: true,
      autoCenterRate: 5,
      autoCenterImmediately: false,
      backend: 'WebAudio',
      backgroundColor: null,
      barHeight: 1,
      barRadius: 0,
      barGap: null,
      barMinHeight: null,
      container: null,
      cursorColor: '#333',
      cursorWidth: 1,
      dragSelection: true,
      drawingContextAttributes: {
        // Boolean that hints the user agent to reduce the latency
        // by desynchronizing the canvas paint cycle from the event
        // loop
        desynchronized: false
      },
      duration: null,
      fillParent: true,
      forceDecode: false,
      height: 128,
      hideScrollbar: false,
      ignoreSilenceMode: false,
      interact: true,
      loopSelection: true,
      maxCanvasWidth: 4000,
      mediaContainer: null,
      mediaControls: false,
      mediaType: 'audio',
      minPxPerSec: 20,
      normalize: false,
      partialRender: false,
      pixelRatio: window.devicePixelRatio || screen.deviceXDPI / screen.logicalXDPI,
      plugins: [],
      progressColor: '#555',
      removeMediaElementOnDestroy: true,
      renderer: _drawer.default,
      responsive: false,
      rtl: false,
      scrollParent: false,
      skipLength: 2,
      splitChannels: false,
      splitChannelsOptions: {
        overlay: false,
        channelColors: {},
        filterChannels: [],
        relativeNormalization: false
      },
      vertical: false,
      waveColor: '#999',
      xhr: {}
    };
    _this.backends = {
      MediaElement: _mediaelement.default,
      WebAudio: _webaudio.default,
      MediaElementWebAudio: _mediaelementWebaudio.default
    };
    _this.util = util;
    _this.params = Object.assign({}, _this.defaultParams, params);
    _this.params.splitChannelsOptions = Object.assign({}, _this.defaultParams.splitChannelsOptions, params.splitChannelsOptions);
    /** @private */

    _this.container = 'string' == typeof params.container ? document.querySelector(_this.params.container) : _this.params.container;

    if (!_this.container) {
      throw new Error('Container element not found');
    }

    if (_this.params.mediaContainer == null) {
      /** @private */
      _this.mediaContainer = _this.container;
    } else if (typeof _this.params.mediaContainer == 'string') {
      /** @private */
      _this.mediaContainer = document.querySelector(_this.params.mediaContainer);
    } else {
      /** @private */
      _this.mediaContainer = _this.params.mediaContainer;
    }

    if (!_this.mediaContainer) {
      throw new Error('Media Container element not found');
    }

    if (_this.params.maxCanvasWidth <= 1) {
      throw new Error('maxCanvasWidth must be greater than 1');
    } else if (_this.params.maxCanvasWidth % 2 == 1) {
      throw new Error('maxCanvasWidth must be an even number');
    }

    if (_this.params.rtl === true) {
      if (_this.params.vertical === true) {
        util.style(_this.container, {
          transform: 'rotateX(180deg)'
        });
      } else {
        util.style(_this.container, {
          transform: 'rotateY(180deg)'
        });
      }
    }

    if (_this.params.backgroundColor) {
      _this.setBackgroundColor(_this.params.backgroundColor);
    }
    /**
     * @private Used to save the current volume when muting so we can
     * restore once unmuted
     * @type {number}
     */


    _this.savedVolume = 0;
    /**
     * @private The current muted state
     * @type {boolean}
     */

    _this.isMuted = false;
    /**
     * @private Will hold a list of event descriptors that need to be
     * canceled on subsequent loads of audio
     * @type {Object[]}
     */

    _this.tmpEvents = [];
    /**
     * @private Holds any running audio downloads
     * @type {Observer}
     */

    _this.currentRequest = null;
    /** @private */

    _this.arraybuffer = null;
    /** @private */

    _this.drawer = null;
    /** @private */

    _this.backend = null;
    /** @private */

    _this.peakCache = null; // cache constructor objects

    if (typeof _this.params.renderer !== 'function') {
      throw new Error('Renderer parameter is invalid');
    }
    /**
     * @private The uninitialised Drawer class
     */


    _this.Drawer = _this.params.renderer;
    /**
     * @private The uninitialised Backend class
     */
    // Back compat

    if (_this.params.backend == 'AudioElement') {
      _this.params.backend = 'MediaElement';
    }

    if ((_this.params.backend == 'WebAudio' || _this.params.backend === 'MediaElementWebAudio') && !_webaudio.default.prototype.supportsWebAudio.call(null)) {
      _this.params.backend = 'MediaElement';
    }

    _this.Backend = _this.backends[_this.params.backend];
    /**
     * @private map of plugin names that are currently initialised
     */

    _this.initialisedPluginList = {};
    /** @private */

    _this.isDestroyed = false;
    /**
     * Get the current ready status.
     *
     * @example const isReady = wavesurfer.isReady;
     * @return {boolean}
     */

    _this.isReady = false; // responsive debounced event listener. If this.params.responsive is not
    // set, this is never called. Use 100ms or this.params.responsive as
    // timeout for the debounce function.

    var prevWidth = 0;
    _this._onResize = util.debounce(function () {
      if (prevWidth != _this.drawer.wrapper.clientWidth && !_this.params.scrollParent) {
        prevWidth = _this.drawer.wrapper.clientWidth;

        _this.drawer.fireEvent('redraw');
      }
    }, typeof _this.params.responsive === 'number' ? _this.params.responsive : 100);
    return _possibleConstructorReturn(_this, _assertThisInitialized(_this));
  }
  /**
   * Initialise the wave
   *
   * @example
   * var wavesurfer = new WaveSurfer(params);
   * wavesurfer.init();
   * @return {this} The wavesurfer instance
   */


  _createClass(WaveSurfer, [{
    key: "init",
    value: function init() {
      this.registerPlugins(this.params.plugins);
      this.createDrawer();
      this.createBackend();
      this.createPeakCache();
      return this;
    }
    /**
     * Add and initialise array of plugins (if `plugin.deferInit` is falsey),
     * this function is called in the init function of wavesurfer
     *
     * @param {PluginDefinition[]} plugins An array of plugin definitions
     * @emits {WaveSurfer#plugins-registered} Called with the array of plugin definitions
     * @return {this} The wavesurfer instance
     */

  }, {
    key: "registerPlugins",
    value: function registerPlugins(plugins) {
      var _this2 = this;

      // first instantiate all the plugins
      plugins.forEach(function (plugin) {
        return _this2.addPlugin(plugin);
      }); // now run the init functions

      plugins.forEach(function (plugin) {
        // call init function of the plugin if deferInit is falsey
        // in that case you would manually use initPlugins()
        if (!plugin.deferInit) {
          _this2.initPlugin(plugin.name);
        }
      });
      this.fireEvent('plugins-registered', plugins);
      return this;
    }
    /**
     * Get a map of plugin names that are currently initialised
     *
     * @example wavesurfer.getPlugins();
     * @return {Object} Object with plugin names
     */

  }, {
    key: "getActivePlugins",
    value: function getActivePlugins() {
      return this.initialisedPluginList;
    }
    /**
     * Add a plugin object to wavesurfer
     *
     * @param {PluginDefinition} plugin A plugin definition
     * @emits {WaveSurfer#plugin-added} Called with the name of the plugin that was added
     * @example wavesurfer.addPlugin(WaveSurfer.minimap());
     * @return {this} The wavesurfer instance
     */

  }, {
    key: "addPlugin",
    value: function addPlugin(plugin) {
      var _this3 = this;

      if (!plugin.name) {
        throw new Error('Plugin does not have a name!');
      }

      if (!plugin.instance) {
        throw new Error("Plugin ".concat(plugin.name, " does not have an instance property!"));
      } // staticProps properties are applied to wavesurfer instance


      if (plugin.staticProps) {
        Object.keys(plugin.staticProps).forEach(function (pluginStaticProp) {
          /**
           * Properties defined in a plugin definition's `staticProps` property are added as
           * staticProps properties of the WaveSurfer instance
           */
          _this3[pluginStaticProp] = plugin.staticProps[pluginStaticProp];
        });
      }

      var Instance = plugin.instance; // turn the plugin instance into an observer

      var observerPrototypeKeys = Object.getOwnPropertyNames(util.Observer.prototype);
      observerPrototypeKeys.forEach(function (key) {
        Instance.prototype[key] = util.Observer.prototype[key];
      });
      /**
       * Instantiated plugin classes are added as a property of the wavesurfer
       * instance
       * @type {Object}
       */

      this[plugin.name] = new Instance(plugin.params || {}, this);
      this.fireEvent('plugin-added', plugin.name);
      return this;
    }
    /**
     * Initialise a plugin
     *
     * @param {string} name A plugin name
     * @emits WaveSurfer#plugin-initialised
     * @example wavesurfer.initPlugin('minimap');
     * @return {this} The wavesurfer instance
     */

  }, {
    key: "initPlugin",
    value: function initPlugin(name) {
      if (!this[name]) {
        throw new Error("Plugin ".concat(name, " has not been added yet!"));
      }

      if (this.initialisedPluginList[name]) {
        // destroy any already initialised plugins
        this.destroyPlugin(name);
      }

      this[name].init();
      this.initialisedPluginList[name] = true;
      this.fireEvent('plugin-initialised', name);
      return this;
    }
    /**
     * Destroy a plugin
     *
     * @param {string} name A plugin name
     * @emits WaveSurfer#plugin-destroyed
     * @example wavesurfer.destroyPlugin('minimap');
     * @returns {this} The wavesurfer instance
     */

  }, {
    key: "destroyPlugin",
    value: function destroyPlugin(name) {
      if (!this[name]) {
        throw new Error("Plugin ".concat(name, " has not been added yet and cannot be destroyed!"));
      }

      if (!this.initialisedPluginList[name]) {
        throw new Error("Plugin ".concat(name, " is not active and cannot be destroyed!"));
      }

      if (typeof this[name].destroy !== 'function') {
        throw new Error("Plugin ".concat(name, " does not have a destroy function!"));
      }

      this[name].destroy();
      delete this.initialisedPluginList[name];
      this.fireEvent('plugin-destroyed', name);
      return this;
    }
    /**
     * Destroy all initialised plugins. Convenience function to use when
     * wavesurfer is removed
     *
     * @private
     */

  }, {
    key: "destroyAllPlugins",
    value: function destroyAllPlugins() {
      var _this4 = this;

      Object.keys(this.initialisedPluginList).forEach(function (name) {
        return _this4.destroyPlugin(name);
      });
    }
    /**
     * Create the drawer and draw the waveform
     *
     * @private
     * @emits WaveSurfer#drawer-created
     */

  }, {
    key: "createDrawer",
    value: function createDrawer() {
      var _this5 = this;

      this.drawer = new this.Drawer(this.container, this.params);
      this.drawer.init();
      this.fireEvent('drawer-created', this.drawer);

      if (this.params.responsive !== false) {
        window.addEventListener('resize', this._onResize, true);
        window.addEventListener('orientationchange', this._onResize, true);
      }

      this.drawer.on('redraw', function () {
        _this5.drawBuffer();

        _this5.drawer.progress(_this5.backend.getPlayedPercents());
      }); // Click-to-seek

      this.drawer.on('click', function (e, progress) {
        setTimeout(function () {
          return _this5.seekTo(progress);
        }, 0);
      }); // Relay the scroll event from the drawer

      this.drawer.on('scroll', function (e) {
        if (_this5.params.partialRender) {
          _this5.drawBuffer();
        }

        _this5.fireEvent('scroll', e);
      });
    }
    /**
     * Create the backend
     *
     * @private
     * @emits WaveSurfer#backend-created
     */

  }, {
    key: "createBackend",
    value: function createBackend() {
      var _this6 = this;

      if (this.backend) {
        this.backend.destroy();
      }

      this.backend = new this.Backend(this.params);
      this.backend.init();
      this.fireEvent('backend-created', this.backend);
      this.backend.on('finish', function () {
        _this6.drawer.progress(_this6.backend.getPlayedPercents());

        _this6.fireEvent('finish');
      });
      this.backend.on('play', function () {
        return _this6.fireEvent('play');
      });
      this.backend.on('pause', function () {
        return _this6.fireEvent('pause');
      });
      this.backend.on('audioprocess', function (time) {
        _this6.drawer.progress(_this6.backend.getPlayedPercents());

        _this6.fireEvent('audioprocess', time);
      }); // only needed for MediaElement and MediaElementWebAudio backend

      if (this.params.backend === 'MediaElement' || this.params.backend === 'MediaElementWebAudio') {
        this.backend.on('seek', function () {
          _this6.drawer.progress(_this6.backend.getPlayedPercents());
        });
        this.backend.on('volume', function () {
          var newVolume = _this6.getVolume();

          _this6.fireEvent('volume', newVolume);

          if (_this6.backend.isMuted !== _this6.isMuted) {
            _this6.isMuted = _this6.backend.isMuted;

            _this6.fireEvent('mute', _this6.isMuted);
          }
        });
      }
    }
    /**
     * Create the peak cache
     *
     * @private
     */

  }, {
    key: "createPeakCache",
    value: function createPeakCache() {
      if (this.params.partialRender) {
        this.peakCache = new _peakcache.default();
      }
    }
    /**
     * Get the duration of the audio clip
     *
     * @example const duration = wavesurfer.getDuration();
     * @return {number} Duration in seconds
     */

  }, {
    key: "getDuration",
    value: function getDuration() {
      return this.backend.getDuration();
    }
    /**
     * Get the current playback position
     *
     * @example const currentTime = wavesurfer.getCurrentTime();
     * @return {number} Playback position in seconds
     */

  }, {
    key: "getCurrentTime",
    value: function getCurrentTime() {
      return this.backend.getCurrentTime();
    }
    /**
     * Set the current play time in seconds.
     *
     * @param {number} seconds A positive number in seconds. E.g. 10 means 10
     * seconds, 60 means 1 minute
     */

  }, {
    key: "setCurrentTime",
    value: function setCurrentTime(seconds) {
      if (seconds >= this.getDuration()) {
        this.seekTo(1);
      } else {
        this.seekTo(seconds / this.getDuration());
      }
    }
    /**
     * Starts playback from the current position. Optional start and end
     * measured in seconds can be used to set the range of audio to play.
     *
     * @param {?number} start Position to start at
     * @param {?number} end Position to end at
     * @emits WaveSurfer#interaction
     * @return {Promise} Result of the backend play method
     * @example
     * // play from second 1 to 5
     * wavesurfer.play(1, 5);
     */

  }, {
    key: "play",
    value: function play(start, end) {
      var _this7 = this;

      if (this.params.ignoreSilenceMode) {
        // ignores device hardware silence mode
        util.ignoreSilenceMode();
      }

      this.fireEvent('interaction', function () {
        return _this7.play(start, end);
      });
      return this.backend.play(start, end);
    }
    /**
     * Set a point in seconds for playback to stop at.
     *
     * @param {number} position Position (in seconds) to stop at
     * @version 3.3.0
     */

  }, {
    key: "setPlayEnd",
    value: function setPlayEnd(position) {
      this.backend.setPlayEnd(position);
    }
    /**
     * Stops and pauses playback
     *
     * @example wavesurfer.pause();
     * @return {Promise} Result of the backend pause method
     */

  }, {
    key: "pause",
    value: function pause() {
      if (!this.backend.isPaused()) {
        return this.backend.pause();
      }
    }
    /**
     * Toggle playback
     *
     * @example wavesurfer.playPause();
     * @return {Promise} Result of the backend play or pause method
     */

  }, {
    key: "playPause",
    value: function playPause() {
      return this.backend.isPaused() ? this.play() : this.pause();
    }
    /**
     * Get the current playback state
     *
     * @example const isPlaying = wavesurfer.isPlaying();
     * @return {boolean} False if paused, true if playing
     */

  }, {
    key: "isPlaying",
    value: function isPlaying() {
      return !this.backend.isPaused();
    }
    /**
     * Skip backward
     *
     * @param {?number} seconds Amount to skip back, if not specified `skipLength`
     * is used
     * @example wavesurfer.skipBackward();
     */

  }, {
    key: "skipBackward",
    value: function skipBackward(seconds) {
      this.skip(-seconds || -this.params.skipLength);
    }
    /**
     * Skip forward
     *
     * @param {?number} seconds Amount to skip back, if not specified `skipLength`
     * is used
     * @example wavesurfer.skipForward();
     */

  }, {
    key: "skipForward",
    value: function skipForward(seconds) {
      this.skip(seconds || this.params.skipLength);
    }
    /**
     * Skip a number of seconds from the current position (use a negative value
     * to go backwards).
     *
     * @param {number} offset Amount to skip back or forwards
     * @example
     * // go back 2 seconds
     * wavesurfer.skip(-2);
     */

  }, {
    key: "skip",
    value: function skip(offset) {
      var duration = this.getDuration() || 1;
      var position = this.getCurrentTime() || 0;
      position = Math.max(0, Math.min(duration, position + (offset || 0)));
      this.seekAndCenter(position / duration);
    }
    /**
     * Seeks to a position and centers the view
     *
     * @param {number} progress Between 0 (=beginning) and 1 (=end)
     * @example
     * // seek and go to the middle of the audio
     * wavesurfer.seekTo(0.5);
     */

  }, {
    key: "seekAndCenter",
    value: function seekAndCenter(progress) {
      this.seekTo(progress);
      this.drawer.recenter(progress);
    }
    /**
     * Seeks to a position
     *
     * @param {number} progress Between 0 (=beginning) and 1 (=end)
     * @emits WaveSurfer#interaction
     * @emits WaveSurfer#seek
     * @example
     * // seek to the middle of the audio
     * wavesurfer.seekTo(0.5);
     */

  }, {
    key: "seekTo",
    value: function seekTo(progress) {
      var _this8 = this;

      // return an error if progress is not a number between 0 and 1
      if (typeof progress !== 'number' || !isFinite(progress) || progress < 0 || progress > 1) {
        throw new Error('Error calling wavesurfer.seekTo, parameter must be a number between 0 and 1!');
      }

      this.fireEvent('interaction', function () {
        return _this8.seekTo(progress);
      });
      var isWebAudioBackend = this.params.backend === 'WebAudio';
      var paused = this.backend.isPaused();

      if (isWebAudioBackend && !paused) {
        this.backend.pause();
      } // avoid small scrolls while paused seeking


      var oldScrollParent = this.params.scrollParent;
      this.params.scrollParent = false;
      this.backend.seekTo(progress * this.getDuration());
      this.drawer.progress(progress);

      if (isWebAudioBackend && !paused) {
        this.backend.play();
      }

      this.params.scrollParent = oldScrollParent;
      this.fireEvent('seek', progress);
    }
    /**
     * Stops and goes to the beginning.
     *
     * @example wavesurfer.stop();
     */

  }, {
    key: "stop",
    value: function stop() {
      this.pause();
      this.seekTo(0);
      this.drawer.progress(0);
    }
    /**
     * Sets the ID of the audio device to use for output and returns a Promise.
     *
     * @param {string} deviceId String value representing underlying output
     * device
     * @returns {Promise} `Promise` that resolves to `undefined` when there are
     * no errors detected.
     */

  }, {
    key: "setSinkId",
    value: function setSinkId(deviceId) {
      return this.backend.setSinkId(deviceId);
    }
    /**
     * Set the playback volume.
     *
     * @param {number} newVolume A value between 0 and 1, 0 being no
     * volume and 1 being full volume.
     * @emits WaveSurfer#volume
     */

  }, {
    key: "setVolume",
    value: function setVolume(newVolume) {
      this.backend.setVolume(newVolume);
      this.fireEvent('volume', newVolume);
    }
    /**
     * Get the playback volume.
     *
     * @return {number} A value between 0 and 1, 0 being no
     * volume and 1 being full volume.
     */

  }, {
    key: "getVolume",
    value: function getVolume() {
      return this.backend.getVolume();
    }
    /**
     * Set the playback rate.
     *
     * @param {number} rate A positive number. E.g. 0.5 means half the normal
     * speed, 2 means double speed and so on.
     * @example wavesurfer.setPlaybackRate(2);
     */

  }, {
    key: "setPlaybackRate",
    value: function setPlaybackRate(rate) {
      this.backend.setPlaybackRate(rate);
    }
    /**
     * Get the playback rate.
     *
     * @return {number} The current playback rate.
     */

  }, {
    key: "getPlaybackRate",
    value: function getPlaybackRate() {
      return this.backend.getPlaybackRate();
    }
    /**
     * Toggle the volume on and off. If not currently muted it will save the
     * current volume value and turn the volume off. If currently muted then it
     * will restore the volume to the saved value, and then rest the saved
     * value.
     *
     * @example wavesurfer.toggleMute();
     */

  }, {
    key: "toggleMute",
    value: function toggleMute() {
      this.setMute(!this.isMuted);
    }
    /**
     * Enable or disable muted audio
     *
     * @param {boolean} mute Specify `true` to mute audio.
     * @emits WaveSurfer#volume
     * @emits WaveSurfer#mute
     * @example
     * // unmute
     * wavesurfer.setMute(false);
     * console.log(wavesurfer.getMute()) // logs false
     */

  }, {
    key: "setMute",
    value: function setMute(mute) {
      // ignore all muting requests if the audio is already in that state
      if (mute === this.isMuted) {
        this.fireEvent('mute', this.isMuted);
        return;
      }

      if (this.backend.setMute) {
        // Backends such as the MediaElement backend have their own handling
        // of mute, let them handle it.
        this.backend.setMute(mute);
        this.isMuted = mute;
      } else {
        if (mute) {
          // If currently not muted then save current volume,
          // turn off the volume and update the mute properties
          this.savedVolume = this.backend.getVolume();
          this.backend.setVolume(0);
          this.isMuted = true;
          this.fireEvent('volume', 0);
        } else {
          // If currently muted then restore to the saved volume
          // and update the mute properties
          this.backend.setVolume(this.savedVolume);
          this.isMuted = false;
          this.fireEvent('volume', this.savedVolume);
        }
      }

      this.fireEvent('mute', this.isMuted);
    }
    /**
     * Get the current mute status.
     *
     * @example const isMuted = wavesurfer.getMute();
     * @return {boolean} Current mute status
     */

  }, {
    key: "getMute",
    value: function getMute() {
      return this.isMuted;
    }
    /**
     * Get the list of current set filters as an array.
     *
     * Filters must be set with setFilters method first
     *
     * @return {array} List of enabled filters
     */

  }, {
    key: "getFilters",
    value: function getFilters() {
      return this.backend.filters || [];
    }
    /**
     * Toggles `scrollParent` and redraws
     *
     * @example wavesurfer.toggleScroll();
     */

  }, {
    key: "toggleScroll",
    value: function toggleScroll() {
      this.params.scrollParent = !this.params.scrollParent;
      this.drawBuffer();
    }
    /**
     * Toggle mouse interaction
     *
     * @example wavesurfer.toggleInteraction();
     */

  }, {
    key: "toggleInteraction",
    value: function toggleInteraction() {
      this.params.interact = !this.params.interact;
    }
    /**
     * Get the fill color of the waveform after the cursor.
     *
     * @return {string} A CSS color string.
     */

  }, {
    key: "getWaveColor",
    value: function getWaveColor() {
      return this.params.waveColor;
    }
    /**
     * Set the fill color of the waveform after the cursor.
     *
     * @param {string} color A CSS color string.
     * @example wavesurfer.setWaveColor('#ddd');
     */

  }, {
    key: "setWaveColor",
    value: function setWaveColor(color) {
      this.params.waveColor = color;
      this.drawBuffer();
    }
    /**
     * Get the fill color of the waveform behind the cursor.
     *
     * @return {string} A CSS color string.
     */

  }, {
    key: "getProgressColor",
    value: function getProgressColor() {
      return this.params.progressColor;
    }
    /**
     * Set the fill color of the waveform behind the cursor.
     *
     * @param {string} color A CSS color string.
     * @example wavesurfer.setProgressColor('#400');
     */

  }, {
    key: "setProgressColor",
    value: function setProgressColor(color) {
      this.params.progressColor = color;
      this.drawBuffer();
    }
    /**
     * Get the background color of the waveform container.
     *
     * @return {string} A CSS color string.
     */

  }, {
    key: "getBackgroundColor",
    value: function getBackgroundColor() {
      return this.params.backgroundColor;
    }
    /**
     * Set the background color of the waveform container.
     *
     * @param {string} color A CSS color string.
     * @example wavesurfer.setBackgroundColor('#FF00FF');
     */

  }, {
    key: "setBackgroundColor",
    value: function setBackgroundColor(color) {
      this.params.backgroundColor = color;
      util.style(this.container, {
        background: this.params.backgroundColor
      });
    }
    /**
     * Get the fill color of the cursor indicating the playhead
     * position.
     *
     * @return {string} A CSS color string.
     */

  }, {
    key: "getCursorColor",
    value: function getCursorColor() {
      return this.params.cursorColor;
    }
    /**
     * Set the fill color of the cursor indicating the playhead
     * position.
     *
     * @param {string} color A CSS color string.
     * @example wavesurfer.setCursorColor('#222');
     */

  }, {
    key: "setCursorColor",
    value: function setCursorColor(color) {
      this.params.cursorColor = color;
      this.drawer.updateCursor();
    }
    /**
     * Get the height of the waveform.
     *
     * @return {number} Height measured in pixels.
     */

  }, {
    key: "getHeight",
    value: function getHeight() {
      return this.params.height;
    }
    /**
     * Set the height of the waveform.
     *
     * @param {number} height Height measured in pixels.
     * @example wavesurfer.setHeight(200);
     */

  }, {
    key: "setHeight",
    value: function setHeight(height) {
      this.params.height = height;
      this.drawer.setHeight(height * this.params.pixelRatio);
      this.drawBuffer();
    }
    /**
     * Hide channels from being drawn on the waveform if splitting channels.
     *
     * For example, if we want to draw only the peaks for the right stereo channel:
     *
     * const wavesurfer = new WaveSurfer.create({...splitChannels: true});
     * wavesurfer.load('stereo_audio.mp3');
     *
     * wavesurfer.setFilteredChannel([0]); <-- hide left channel peaks.
     *
     * @param {array} channelIndices Channels to be filtered out from drawing.
     * @version 4.0.0
     */

  }, {
    key: "setFilteredChannels",
    value: function setFilteredChannels(channelIndices) {
      this.params.splitChannelsOptions.filterChannels = channelIndices;
      this.drawBuffer();
    }
    /**
     * Get the correct peaks for current wave view-port and render wave
     *
     * @private
     * @emits WaveSurfer#redraw
     */

  }, {
    key: "drawBuffer",
    value: function drawBuffer() {
      var nominalWidth = Math.round(this.getDuration() * this.params.minPxPerSec * this.params.pixelRatio);
      var parentWidth = this.drawer.getWidth();
      var width = nominalWidth; // always start at 0 after zooming for scrolling : issue redraw left part

      var start = 0;
      var end = Math.max(start + parentWidth, width); // Fill container

      if (this.params.fillParent && (!this.params.scrollParent || nominalWidth < parentWidth)) {
        width = parentWidth;
        start = 0;
        end = width;
      }

      var peaks;

      if (this.params.partialRender) {
        var newRanges = this.peakCache.addRangeToPeakCache(width, start, end);
        var i;

        for (i = 0; i < newRanges.length; i++) {
          peaks = this.backend.getPeaks(width, newRanges[i][0], newRanges[i][1]);
          this.drawer.drawPeaks(peaks, width, newRanges[i][0], newRanges[i][1]);
        }
      } else {
        peaks = this.backend.getPeaks(width, start, end);
        this.drawer.drawPeaks(peaks, width, start, end);
      }

      this.fireEvent('redraw', peaks, width);
    }
    /**
     * Horizontally zooms the waveform in and out. It also changes the parameter
     * `minPxPerSec` and enables the `scrollParent` option. Calling the function
     * with a falsey parameter will reset the zoom state.
     *
     * @param {?number} pxPerSec Number of horizontal pixels per second of
     * audio, if none is set the waveform returns to unzoomed state
     * @emits WaveSurfer#zoom
     * @example wavesurfer.zoom(20);
     */

  }, {
    key: "zoom",
    value: function zoom(pxPerSec) {
      if (!pxPerSec) {
        this.params.minPxPerSec = this.defaultParams.minPxPerSec;
        this.params.scrollParent = false;
      } else {
        this.params.minPxPerSec = pxPerSec;
        this.params.scrollParent = true;
      }

      this.drawBuffer();
      this.drawer.progress(this.backend.getPlayedPercents());
      this.drawer.recenter(this.getCurrentTime() / this.getDuration());
      this.fireEvent('zoom', pxPerSec);
    }
    /**
     * Decode buffer and load
     *
     * @private
     * @param {ArrayBuffer} arraybuffer Buffer to process
     */

  }, {
    key: "loadArrayBuffer",
    value: function loadArrayBuffer(arraybuffer) {
      var _this9 = this;

      this.decodeArrayBuffer(arraybuffer, function (data) {
        if (!_this9.isDestroyed) {
          _this9.loadDecodedBuffer(data);
        }
      });
    }
    /**
     * Directly load an externally decoded AudioBuffer
     *
     * @private
     * @param {AudioBuffer} buffer Buffer to process
     * @emits WaveSurfer#ready
     */

  }, {
    key: "loadDecodedBuffer",
    value: function loadDecodedBuffer(buffer) {
      this.backend.load(buffer);
      this.drawBuffer();
      this.isReady = true;
      this.fireEvent('ready');
    }
    /**
     * Loads audio data from a Blob or File object
     *
     * @param {Blob|File} blob Audio data
     * @example
     */

  }, {
    key: "loadBlob",
    value: function loadBlob(blob) {
      var _this10 = this;

      // Create file reader
      var reader = new FileReader();
      reader.addEventListener('progress', function (e) {
        return _this10.onProgress(e);
      });
      reader.addEventListener('load', function (e) {
        return _this10.loadArrayBuffer(e.target.result);
      });
      reader.addEventListener('error', function () {
        return _this10.fireEvent('error', 'Error reading file');
      });
      reader.readAsArrayBuffer(blob);
      this.empty();
    }
    /**
     * Loads audio and re-renders the waveform.
     *
     * @param {string|HTMLMediaElement} url The url of the audio file or the
     * audio element with the audio
     * @param {number[]|Number.<Array[]>} peaks Wavesurfer does not have to decode
     * the audio to render the waveform if this is specified
     * @param {?string} preload (Use with backend `MediaElement` and `MediaElementWebAudio`)
     * `'none'|'metadata'|'auto'` Preload attribute for the media element
     * @param {?number} duration The duration of the audio. This is used to
     * render the peaks data in the correct size for the audio duration (as
     * befits the current `minPxPerSec` and zoom value) without having to decode
     * the audio.
     * @returns {void}
     * @throws Will throw an error if the `url` argument is empty.
     * @example
     * // uses fetch or media element to load file (depending on backend)
     * wavesurfer.load('http://example.com/demo.wav');
     *
     * // setting preload attribute with media element backend and supplying
     * // peaks
     * wavesurfer.load(
     *   'http://example.com/demo.wav',
     *   [0.0218, 0.0183, 0.0165, 0.0198, 0.2137, 0.2888],
     *   true
     * );
     */

  }, {
    key: "load",
    value: function load(url, peaks, preload, duration) {
      if (!url) {
        throw new Error('url parameter cannot be empty');
      }

      this.empty();

      if (preload) {
        // check whether the preload attribute will be usable and if not log
        // a warning listing the reasons why not and nullify the variable
        var preloadIgnoreReasons = {
          "Preload is not 'auto', 'none' or 'metadata'": ['auto', 'metadata', 'none'].indexOf(preload) === -1,
          'Peaks are not provided': !peaks,
          "Backend is not of type 'MediaElement' or 'MediaElementWebAudio'": ['MediaElement', 'MediaElementWebAudio'].indexOf(this.params.backend) === -1,
          'Url is not of type string': typeof url !== 'string'
        };
        var activeReasons = Object.keys(preloadIgnoreReasons).filter(function (reason) {
          return preloadIgnoreReasons[reason];
        });

        if (activeReasons.length) {
          // eslint-disable-next-line no-console
          console.warn('Preload parameter of wavesurfer.load will be ignored because:\n\t- ' + activeReasons.join('\n\t- ')); // stop invalid values from being used

          preload = null;
        }
      } // loadBuffer(url, peaks, duration) requires that url is a string
      // but users can pass in a HTMLMediaElement to WaveSurfer


      if (this.params.backend === 'WebAudio' && url instanceof HTMLMediaElement) {
        url = url.src;
      }

      switch (this.params.backend) {
        case 'WebAudio':
          return this.loadBuffer(url, peaks, duration);

        case 'MediaElement':
        case 'MediaElementWebAudio':
          return this.loadMediaElement(url, peaks, preload, duration);
      }
    }
    /**
     * Loads audio using Web Audio buffer backend.
     *
     * @private
     * @emits WaveSurfer#waveform-ready
     * @param {string} url URL of audio file
     * @param {number[]|Number.<Array[]>} peaks Peaks data
     * @param {?number} duration Optional duration of audio file
     * @returns {void}
     */

  }, {
    key: "loadBuffer",
    value: function loadBuffer(url, peaks, duration) {
      var _this11 = this;

      var load = function load(action) {
        if (action) {
          _this11.tmpEvents.push(_this11.once('ready', action));
        }

        return _this11.getArrayBuffer(url, function (data) {
          return _this11.loadArrayBuffer(data);
        });
      };

      if (peaks) {
        this.backend.setPeaks(peaks, duration);
        this.drawBuffer();
        this.fireEvent('waveform-ready');
        this.tmpEvents.push(this.once('interaction', load));
      } else {
        return load();
      }
    }
    /**
     * Either create a media element, or load an existing media element.
     *
     * @private
     * @emits WaveSurfer#waveform-ready
     * @param {string|HTMLMediaElement} urlOrElt Either a path to a media file, or an
     * existing HTML5 Audio/Video Element
     * @param {number[]|Number.<Array[]>} peaks Array of peaks. Required to bypass web audio
     * dependency
     * @param {?boolean} preload Set to true if the preload attribute of the
     * audio element should be enabled
     * @param {?number} duration Optional duration of audio file
     */

  }, {
    key: "loadMediaElement",
    value: function loadMediaElement(urlOrElt, peaks, preload, duration) {
      var _this12 = this;

      var url = urlOrElt;

      if (typeof urlOrElt === 'string') {
        this.backend.load(url, this.mediaContainer, peaks, preload);
      } else {
        var elt = urlOrElt;
        this.backend.loadElt(elt, peaks); // If peaks are not provided,
        // url = element.src so we can get peaks with web audio

        url = elt.src;
      }

      this.tmpEvents.push(this.backend.once('canplay', function () {
        // ignore when backend was already destroyed
        if (!_this12.backend.destroyed) {
          _this12.drawBuffer();

          _this12.isReady = true;

          _this12.fireEvent('ready');
        }
      }), this.backend.once('error', function (err) {
        return _this12.fireEvent('error', err);
      })); // If peaks are provided, render them and fire the `waveform-ready` event.

      if (peaks) {
        this.backend.setPeaks(peaks, duration);
        this.drawBuffer();
        this.fireEvent('waveform-ready');
      } // If no pre-decoded peaks are provided, or are provided with
      // forceDecode flag, attempt to download the audio file and decode it
      // with Web Audio.


      if ((!peaks || this.params.forceDecode) && this.backend.supportsWebAudio()) {
        this.getArrayBuffer(url, function (arraybuffer) {
          _this12.decodeArrayBuffer(arraybuffer, function (buffer) {
            _this12.backend.buffer = buffer;

            _this12.backend.setPeaks(null);

            _this12.drawBuffer();

            _this12.fireEvent('waveform-ready');
          });
        });
      }
    }
    /**
     * Decode an array buffer and pass data to a callback
     *
     * @private
     * @param {Object} arraybuffer The array buffer to decode
     * @param {function} callback The function to call on complete
     */

  }, {
    key: "decodeArrayBuffer",
    value: function decodeArrayBuffer(arraybuffer, callback) {
      var _this13 = this;

      if (!this.isDestroyed) {
        this.arraybuffer = arraybuffer;
        this.backend.decodeArrayBuffer(arraybuffer, function (data) {
          // Only use the decoded data if we haven't been destroyed or
          // another decode started in the meantime
          if (!_this13.isDestroyed && _this13.arraybuffer == arraybuffer) {
            callback(data);
            _this13.arraybuffer = null;
          }
        }, function () {
          return _this13.fireEvent('error', 'Error decoding audiobuffer');
        });
      }
    }
    /**
     * Load an array buffer using fetch and pass the result to a callback
     *
     * @param {string} url The URL of the file object
     * @param {function} callback The function to call on complete
     * @returns {util.fetchFile} fetch call
     * @private
     */

  }, {
    key: "getArrayBuffer",
    value: function getArrayBuffer(url, callback) {
      var _this14 = this;

      var options = Object.assign({
        url: url,
        responseType: 'arraybuffer'
      }, this.params.xhr);
      var request = util.fetchFile(options);
      this.currentRequest = request;
      this.tmpEvents.push(request.on('progress', function (e) {
        _this14.onProgress(e);
      }), request.on('success', function (data) {
        callback(data);
        _this14.currentRequest = null;
      }), request.on('error', function (e) {
        _this14.fireEvent('error', e);

        _this14.currentRequest = null;
      }));
      return request;
    }
    /**
     * Called while the audio file is loading
     *
     * @private
     * @param {Event} e Progress event
     * @emits WaveSurfer#loading
     */

  }, {
    key: "onProgress",
    value: function onProgress(e) {
      var percentComplete;

      if (e.lengthComputable) {
        percentComplete = e.loaded / e.total;
      } else {
        // Approximate progress with an asymptotic
        // function, and assume downloads in the 1-3 MB range.
        percentComplete = e.loaded / (e.loaded + 1000000);
      }

      this.fireEvent('loading', Math.round(percentComplete * 100), e.target);
    }
    /**
     * Exports PCM data into a JSON array and optionally opens in a new window
     * as valid JSON Blob instance.
     *
     * @param {number} length=1024 The scale in which to export the peaks
     * @param {number} accuracy=10000
     * @param {?boolean} noWindow Set to true to disable opening a new
     * window with the JSON
     * @param {number} start Start index
     * @param {number} end End index
     * @return {Promise} Promise that resolves with array of peaks
     */

  }, {
    key: "exportPCM",
    value: function exportPCM(length, accuracy, noWindow, start, end) {
      length = length || 1024;
      start = start || 0;
      accuracy = accuracy || 10000;
      noWindow = noWindow || false;
      var peaks = this.backend.getPeaks(length, start, end);
      var arr = [].map.call(peaks, function (val) {
        return Math.round(val * accuracy) / accuracy;
      });
      return new Promise(function (resolve, reject) {
        if (!noWindow) {
          var blobJSON = new Blob([JSON.stringify(arr)], {
            type: 'application/json;charset=utf-8'
          });
          var objURL = URL.createObjectURL(blobJSON);
          window.open(objURL);
          URL.revokeObjectURL(objURL);
        }

        resolve(arr);
      });
    }
    /**
     * Save waveform image as data URI.
     *
     * The default format is `'image/png'`. Other supported types are
     * `'image/jpeg'` and `'image/webp'`.
     *
     * @param {string} format='image/png' A string indicating the image format.
     * The default format type is `'image/png'`.
     * @param {number} quality=1 A number between 0 and 1 indicating the image
     * quality to use for image formats that use lossy compression such as
     * `'image/jpeg'`` and `'image/webp'`.
     * @param {string} type Image data type to return. Either 'dataURL' (default)
     * or 'blob'.
     * @return {string|string[]|Promise} When using `'dataURL'` type this returns
     * a single data URL or an array of data URLs, one for each canvas. When using
     * `'blob'` type this returns a `Promise` resolving with an array of `Blob`
     * instances, one for each canvas.
     */

  }, {
    key: "exportImage",
    value: function exportImage(format, quality, type) {
      if (!format) {
        format = 'image/png';
      }

      if (!quality) {
        quality = 1;
      }

      if (!type) {
        type = 'dataURL';
      }

      return this.drawer.getImage(format, quality, type);
    }
    /**
     * Cancel any fetch request currently in progress
     */

  }, {
    key: "cancelAjax",
    value: function cancelAjax() {
      if (this.currentRequest && this.currentRequest.controller) {
        // If the current request has a ProgressHandler, then its ReadableStream might need to be cancelled too
        // See: Wavesurfer issue #2042
        // See Firefox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1583815
        if (this.currentRequest._reader) {
          // Ignoring exceptions thrown by call to cancel()
          this.currentRequest._reader.cancel().catch(function (err) {});
        }

        this.currentRequest.controller.abort();
        this.currentRequest = null;
      }
    }
    /**
     * @private
     */

  }, {
    key: "clearTmpEvents",
    value: function clearTmpEvents() {
      this.tmpEvents.forEach(function (e) {
        return e.un();
      });
    }
    /**
     * Display empty waveform.
     */

  }, {
    key: "empty",
    value: function empty() {
      if (!this.backend.isPaused()) {
        this.stop();
        this.backend.disconnectSource();
      }

      this.isReady = false;
      this.cancelAjax();
      this.clearTmpEvents(); // empty drawer

      this.drawer.progress(0);
      this.drawer.setWidth(0);
      this.drawer.drawPeaks({
        length: this.drawer.getWidth()
      }, 0);
    }
    /**
     * Remove events, elements and disconnect WebAudio nodes.
     *
     * @emits WaveSurfer#destroy
     */

  }, {
    key: "destroy",
    value: function destroy() {
      this.destroyAllPlugins();
      this.fireEvent('destroy');
      this.cancelAjax();
      this.clearTmpEvents();
      this.unAll();

      if (this.params.responsive !== false) {
        window.removeEventListener('resize', this._onResize, true);
        window.removeEventListener('orientationchange', this._onResize, true);
      }

      if (this.backend) {
        this.backend.destroy(); // clears memory usage

        this.backend = null;
      }

      if (this.drawer) {
        this.drawer.destroy();
      }

      this.isDestroyed = true;
      this.isReady = false;
      this.arraybuffer = null;
    }
  }], [{
    key: "create",
    value:
    /** @private */

    /** @private */

    /**
     * Instantiate this class, call its `init` function and returns it
     *
     * @param {WavesurferParams} params The wavesurfer parameters
     * @return {Object} WaveSurfer instance
     * @example const wavesurfer = WaveSurfer.create(params);
     */
    function create(params) {
      var wavesurfer = new WaveSurfer(params);
      return wavesurfer.init();
    }
    /**
     * The library version number is available as a static property of the
     * WaveSurfer class
     *
     * @type {String}
     * @example
     * console.log('Using wavesurfer.js ' + WaveSurfer.VERSION);
     */

  }]);

  return WaveSurfer;
}(util.Observer);

exports.default = WaveSurfer;
WaveSurfer.VERSION = "5.2.0";
WaveSurfer.util = util;
module.exports = exports.default;

/***/ }),

/***/ "./src/webaudio.js":
/*!*************************!*\
  !*** ./src/webaudio.js ***!
  \*************************/
/***/ ((module, exports, __nested_webpack_require_180241__) => {

"use strict";


function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", ({
  value: true
}));
exports.default = void 0;

var util = _interopRequireWildcard(__nested_webpack_require_180241__(/*! ./util */ "./src/util/index.js"));

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

// using constants to prevent someone writing the string wrong
var PLAYING = 'playing';
var PAUSED = 'paused';
var FINISHED = 'finished';
/**
 * WebAudio backend
 *
 * @extends {Observer}
 */

var WebAudio = /*#__PURE__*/function (_util$Observer) {
  _inherits(WebAudio, _util$Observer);

  var _super = _createSuper(WebAudio);

  /**
   * Construct the backend
   *
   * @param {WavesurferParams} params Wavesurfer parameters
   */
  function WebAudio(params) {
    var _this$stateBehaviors, _this$states;

    var _this;

    _classCallCheck(this, WebAudio);

    _this = _super.call(this);
    /** @private */

    _this.audioContext = null;
    _this.offlineAudioContext = null;
    _this.stateBehaviors = (_this$stateBehaviors = {}, _defineProperty(_this$stateBehaviors, PLAYING, {
      init: function init() {
        this.addOnAudioProcess();
      },
      getPlayedPercents: function getPlayedPercents() {
        var duration = this.getDuration();
        return this.getCurrentTime() / duration || 0;
      },
      getCurrentTime: function getCurrentTime() {
        return this.startPosition + this.getPlayedTime();
      }
    }), _defineProperty(_this$stateBehaviors, PAUSED, {
      init: function init() {
        this.removeOnAudioProcess();
      },
      getPlayedPercents: function getPlayedPercents() {
        var duration = this.getDuration();
        return this.getCurrentTime() / duration || 0;
      },
      getCurrentTime: function getCurrentTime() {
        return this.startPosition;
      }
    }), _defineProperty(_this$stateBehaviors, FINISHED, {
      init: function init() {
        this.removeOnAudioProcess();
        this.fireEvent('finish');
      },
      getPlayedPercents: function getPlayedPercents() {
        return 1;
      },
      getCurrentTime: function getCurrentTime() {
        return this.getDuration();
      }
    }), _this$stateBehaviors);
    _this.params = params;
    /** ac: Audio Context instance */

    _this.ac = params.audioContext || (_this.supportsWebAudio() ? _this.getAudioContext() : {});
    /**@private */

    _this.lastPlay = _this.ac.currentTime;
    /** @private */

    _this.startPosition = 0;
    /** @private */

    _this.scheduledPause = null;
    /** @private */

    _this.states = (_this$states = {}, _defineProperty(_this$states, PLAYING, Object.create(_this.stateBehaviors[PLAYING])), _defineProperty(_this$states, PAUSED, Object.create(_this.stateBehaviors[PAUSED])), _defineProperty(_this$states, FINISHED, Object.create(_this.stateBehaviors[FINISHED])), _this$states);
    /** @private */

    _this.buffer = null;
    /** @private */

    _this.filters = [];
    /** gainNode: allows to control audio volume */

    _this.gainNode = null;
    /** @private */

    _this.mergedPeaks = null;
    /** @private */

    _this.offlineAc = null;
    /** @private */

    _this.peaks = null;
    /** @private */

    _this.playbackRate = 1;
    /** analyser: provides audio analysis information */

    _this.analyser = null;
    /** scriptNode: allows processing audio */

    _this.scriptNode = null;
    /** @private */

    _this.source = null;
    /** @private */

    _this.splitPeaks = [];
    /** @private */

    _this.state = null;
    /** @private */

    _this.explicitDuration = params.duration;
    /**
     * Boolean indicating if the backend was destroyed.
     */

    _this.destroyed = false;
    return _this;
  }
  /**
   * Initialise the backend, called in `wavesurfer.createBackend()`
   */


  _createClass(WebAudio, [{
    key: "supportsWebAudio",
    value:
    /** scriptBufferSize: size of the processing buffer */

    /** audioContext: allows to process audio with WebAudio API */

    /** @private */

    /** @private */

    /**
     * Does the browser support this backend
     *
     * @return {boolean} Whether or not this browser supports this backend
     */
    function supportsWebAudio() {
      return !!(window.AudioContext || window.webkitAudioContext);
    }
    /**
     * Get the audio context used by this backend or create one
     *
     * @return {AudioContext} Existing audio context, or creates a new one
     */

  }, {
    key: "getAudioContext",
    value: function getAudioContext() {
      if (!window.WaveSurferAudioContext) {
        window.WaveSurferAudioContext = new (window.AudioContext || window.webkitAudioContext)();
      }

      return window.WaveSurferAudioContext;
    }
    /**
     * Get the offline audio context used by this backend or create one
     *
     * @param {number} sampleRate The sample rate to use
     * @return {OfflineAudioContext} Existing offline audio context, or creates
     * a new one
     */

  }, {
    key: "getOfflineAudioContext",
    value: function getOfflineAudioContext(sampleRate) {
      if (!window.WaveSurferOfflineAudioContext) {
        window.WaveSurferOfflineAudioContext = new (window.OfflineAudioContext || window.webkitOfflineAudioContext)(1, 2, sampleRate);
      }

      return window.WaveSurferOfflineAudioContext;
    }
  }, {
    key: "init",
    value: function init() {
      this.createVolumeNode();
      this.createScriptNode();
      this.createAnalyserNode();
      this.setState(PAUSED);
      this.setPlaybackRate(this.params.audioRate);
      this.setLength(0);
    }
    /** @private */

  }, {
    key: "disconnectFilters",
    value: function disconnectFilters() {
      if (this.filters) {
        this.filters.forEach(function (filter) {
          filter && filter.disconnect();
        });
        this.filters = null; // Reconnect direct path

        this.analyser.connect(this.gainNode);
      }
    }
    /**
     * @private
     *
     * @param {string} state The new state
     */

  }, {
    key: "setState",
    value: function setState(state) {
      if (this.state !== this.states[state]) {
        this.state = this.states[state];
        this.state.init.call(this);
      }
    }
    /**
     * Unpacked `setFilters()`
     *
     * @param {...AudioNode} filters One or more filters to set
     */

  }, {
    key: "setFilter",
    value: function setFilter() {
      for (var _len = arguments.length, filters = new Array(_len), _key = 0; _key < _len; _key++) {
        filters[_key] = arguments[_key];
      }

      this.setFilters(filters);
    }
    /**
     * Insert custom Web Audio nodes into the graph
     *
     * @param {AudioNode[]} filters Packed filters array
     * @example
     * const lowpass = wavesurfer.backend.ac.createBiquadFilter();
     * wavesurfer.backend.setFilter(lowpass);
     */

  }, {
    key: "setFilters",
    value: function setFilters(filters) {
      // Remove existing filters
      this.disconnectFilters(); // Insert filters if filter array not empty

      if (filters && filters.length) {
        this.filters = filters; // Disconnect direct path before inserting filters

        this.analyser.disconnect(); // Connect each filter in turn

        filters.reduce(function (prev, curr) {
          prev.connect(curr);
          return curr;
        }, this.analyser).connect(this.gainNode);
      }
    }
    /** Create ScriptProcessorNode to process audio */

  }, {
    key: "createScriptNode",
    value: function createScriptNode() {
      if (this.params.audioScriptProcessor) {
        this.scriptNode = this.params.audioScriptProcessor;
      } else {
        if (this.ac.createScriptProcessor) {
          this.scriptNode = this.ac.createScriptProcessor(WebAudio.scriptBufferSize);
        } else {
          this.scriptNode = this.ac.createJavaScriptNode(WebAudio.scriptBufferSize);
        }
      }

      this.scriptNode.connect(this.ac.destination);
    }
    /** @private */

  }, {
    key: "addOnAudioProcess",
    value: function addOnAudioProcess() {
      var _this2 = this;

      this.scriptNode.onaudioprocess = function () {
        var time = _this2.getCurrentTime();

        if (time >= _this2.getDuration()) {
          _this2.setState(FINISHED);

          _this2.fireEvent('pause');
        } else if (time >= _this2.scheduledPause) {
          _this2.pause();
        } else if (_this2.state === _this2.states[PLAYING]) {
          _this2.fireEvent('audioprocess', time);
        }
      };
    }
    /** @private */

  }, {
    key: "removeOnAudioProcess",
    value: function removeOnAudioProcess() {
      this.scriptNode.onaudioprocess = null;
    }
    /** Create analyser node to perform audio analysis */

  }, {
    key: "createAnalyserNode",
    value: function createAnalyserNode() {
      this.analyser = this.ac.createAnalyser();
      this.analyser.connect(this.gainNode);
    }
    /**
     * Create the gain node needed to control the playback volume.
     *
     */

  }, {
    key: "createVolumeNode",
    value: function createVolumeNode() {
      // Create gain node using the AudioContext
      if (this.ac.createGain) {
        this.gainNode = this.ac.createGain();
      } else {
        this.gainNode = this.ac.createGainNode();
      } // Add the gain node to the graph


      this.gainNode.connect(this.ac.destination);
    }
    /**
     * Set the sink id for the media player
     *
     * @param {string} deviceId String value representing audio device id.
     * @returns {Promise} A Promise that resolves to `undefined` when there
     * are no errors.
     */

  }, {
    key: "setSinkId",
    value: function setSinkId(deviceId) {
      if (deviceId) {
        /**
         * The webaudio API doesn't currently support setting the device
         * output. Here we create an HTMLAudioElement, connect the
         * webaudio stream to that element and setSinkId there.
         */
        var audio = new window.Audio();

        if (!audio.setSinkId) {
          return Promise.reject(new Error('setSinkId is not supported in your browser'));
        }

        audio.autoplay = true;
        var dest = this.ac.createMediaStreamDestination();
        this.gainNode.disconnect();
        this.gainNode.connect(dest);
        audio.srcObject = dest.stream;
        return audio.setSinkId(deviceId);
      } else {
        return Promise.reject(new Error('Invalid deviceId: ' + deviceId));
      }
    }
    /**
     * Set the audio volume
     *
     * @param {number} value A floating point value between 0 and 1.
     */

  }, {
    key: "setVolume",
    value: function setVolume(value) {
      this.gainNode.gain.setValueAtTime(value, this.ac.currentTime);
    }
    /**
     * Get the current volume
     *
     * @return {number} value A floating point value between 0 and 1.
     */

  }, {
    key: "getVolume",
    value: function getVolume() {
      return this.gainNode.gain.value;
    }
    /**
     * Decode an array buffer and pass data to a callback
     *
     * @private
     * @param {ArrayBuffer} arraybuffer The array buffer to decode
     * @param {function} callback The function to call on complete.
     * @param {function} errback The function to call on error.
     */

  }, {
    key: "decodeArrayBuffer",
    value: function decodeArrayBuffer(arraybuffer, callback, errback) {
      if (!this.offlineAc) {
        this.offlineAc = this.getOfflineAudioContext(this.ac && this.ac.sampleRate ? this.ac.sampleRate : 44100);
      }

      if ('webkitAudioContext' in window) {
        // Safari: no support for Promise-based decodeAudioData enabled
        // Enable it in Safari using the Experimental Features > Modern WebAudio API option
        this.offlineAc.decodeAudioData(arraybuffer, function (data) {
          return callback(data);
        }, errback);
      } else {
        this.offlineAc.decodeAudioData(arraybuffer).then(function (data) {
          return callback(data);
        }).catch(function (err) {
          return errback(err);
        });
      }
    }
    /**
     * Set pre-decoded peaks
     *
     * @param {number[]|Number.<Array[]>} peaks Peaks data
     * @param {?number} duration Explicit duration
     */

  }, {
    key: "setPeaks",
    value: function setPeaks(peaks, duration) {
      if (duration != null) {
        this.explicitDuration = duration;
      }

      this.peaks = peaks;
    }
    /**
     * Set the rendered length (different from the length of the audio)
     *
     * @param {number} length The rendered length
     */

  }, {
    key: "setLength",
    value: function setLength(length) {
      // No resize, we can preserve the cached peaks.
      if (this.mergedPeaks && length == 2 * this.mergedPeaks.length - 1 + 2) {
        return;
      }

      this.splitPeaks = [];
      this.mergedPeaks = []; // Set the last element of the sparse array so the peak arrays are
      // appropriately sized for other calculations.

      var channels = this.buffer ? this.buffer.numberOfChannels : 1;
      var c;

      for (c = 0; c < channels; c++) {
        this.splitPeaks[c] = [];
        this.splitPeaks[c][2 * (length - 1)] = 0;
        this.splitPeaks[c][2 * (length - 1) + 1] = 0;
      }

      this.mergedPeaks[2 * (length - 1)] = 0;
      this.mergedPeaks[2 * (length - 1) + 1] = 0;
    }
    /**
     * Compute the max and min value of the waveform when broken into <length> subranges.
     *
     * @param {number} length How many subranges to break the waveform into.
     * @param {number} first First sample in the required range.
     * @param {number} last Last sample in the required range.
     * @return {number[]|Number.<Array[]>} Array of 2*<length> peaks or array of arrays of
     * peaks consisting of (max, min) values for each subrange.
     */

  }, {
    key: "getPeaks",
    value: function getPeaks(length, first, last) {
      if (this.peaks) {
        return this.peaks;
      }

      if (!this.buffer) {
        return [];
      }

      first = first || 0;
      last = last || length - 1;
      this.setLength(length);

      if (!this.buffer) {
        return this.params.splitChannels ? this.splitPeaks : this.mergedPeaks;
      }
      /**
       * The following snippet fixes a buffering data issue on the Safari
       * browser which returned undefined It creates the missing buffer based
       * on 1 channel, 4096 samples and the sampleRate from the current
       * webaudio context 4096 samples seemed to be the best fit for rendering
       * will review this code once a stable version of Safari TP is out
       */


      if (!this.buffer.length) {
        var newBuffer = this.createBuffer(1, 4096, this.sampleRate);
        this.buffer = newBuffer.buffer;
      }

      var sampleSize = this.buffer.length / length;
      var sampleStep = ~~(sampleSize / 10) || 1;
      var channels = this.buffer.numberOfChannels;
      var c;

      for (c = 0; c < channels; c++) {
        var peaks = this.splitPeaks[c];
        var chan = this.buffer.getChannelData(c);
        var i = void 0;

        for (i = first; i <= last; i++) {
          var start = ~~(i * sampleSize);
          var end = ~~(start + sampleSize);
          /**
           * Initialize the max and min to the first sample of this
           * subrange, so that even if the samples are entirely
           * on one side of zero, we still return the true max and
           * min values in the subrange.
           */

          var min = chan[start];
          var max = min;
          var j = void 0;

          for (j = start; j < end; j += sampleStep) {
            var value = chan[j];

            if (value > max) {
              max = value;
            }

            if (value < min) {
              min = value;
            }
          }

          peaks[2 * i] = max;
          peaks[2 * i + 1] = min;

          if (c == 0 || max > this.mergedPeaks[2 * i]) {
            this.mergedPeaks[2 * i] = max;
          }

          if (c == 0 || min < this.mergedPeaks[2 * i + 1]) {
            this.mergedPeaks[2 * i + 1] = min;
          }
        }
      }

      return this.params.splitChannels ? this.splitPeaks : this.mergedPeaks;
    }
    /**
     * Get the position from 0 to 1
     *
     * @return {number} Position
     */

  }, {
    key: "getPlayedPercents",
    value: function getPlayedPercents() {
      return this.state.getPlayedPercents.call(this);
    }
    /** @private */

  }, {
    key: "disconnectSource",
    value: function disconnectSource() {
      if (this.source) {
        this.source.disconnect();
      }
    }
    /**
     * Destroy all references with WebAudio, disconnecting audio nodes and closing Audio Context
     */

  }, {
    key: "destroyWebAudio",
    value: function destroyWebAudio() {
      this.disconnectFilters();
      this.disconnectSource();
      this.gainNode.disconnect();
      this.scriptNode.disconnect();
      this.analyser.disconnect(); // close the audioContext if closeAudioContext option is set to true

      if (this.params.closeAudioContext) {
        // check if browser supports AudioContext.close()
        if (typeof this.ac.close === 'function' && this.ac.state != 'closed') {
          this.ac.close();
        } // clear the reference to the audiocontext


        this.ac = null; // clear the actual audiocontext, either passed as param or the
        // global singleton

        if (!this.params.audioContext) {
          window.WaveSurferAudioContext = null;
        } else {
          this.params.audioContext = null;
        } // clear the offlineAudioContext


        window.WaveSurferOfflineAudioContext = null;
      }
    }
    /**
     * This is called when wavesurfer is destroyed
     */

  }, {
    key: "destroy",
    value: function destroy() {
      if (!this.isPaused()) {
        this.pause();
      }

      this.unAll();
      this.buffer = null;
      this.destroyed = true;
      this.destroyWebAudio();
    }
    /**
     * Loaded a decoded audio buffer
     *
     * @param {Object} buffer Decoded audio buffer to load
     */

  }, {
    key: "load",
    value: function load(buffer) {
      this.startPosition = 0;
      this.lastPlay = this.ac.currentTime;
      this.buffer = buffer;
      this.createSource();
    }
    /** @private */

  }, {
    key: "createSource",
    value: function createSource() {
      this.disconnectSource();
      this.source = this.ac.createBufferSource(); // adjust for old browsers

      this.source.start = this.source.start || this.source.noteGrainOn;
      this.source.stop = this.source.stop || this.source.noteOff;
      this.setPlaybackRate(this.playbackRate);
      this.source.buffer = this.buffer;
      this.source.connect(this.analyser);
    }
    /**
     * @private
     *
     * some browsers require an explicit call to #resume before they will play back audio
     */

  }, {
    key: "resumeAudioContext",
    value: function resumeAudioContext() {
      if (this.ac.state == 'suspended') {
        this.ac.resume && this.ac.resume();
      }
    }
    /**
     * Used by `wavesurfer.isPlaying()` and `wavesurfer.playPause()`
     *
     * @return {boolean} Whether or not this backend is currently paused
     */

  }, {
    key: "isPaused",
    value: function isPaused() {
      return this.state !== this.states[PLAYING];
    }
    /**
     * Used by `wavesurfer.getDuration()`
     *
     * @return {number} Duration of loaded buffer
     */

  }, {
    key: "getDuration",
    value: function getDuration() {
      if (this.explicitDuration) {
        return this.explicitDuration;
      }

      if (!this.buffer) {
        return 0;
      }

      return this.buffer.duration;
    }
    /**
     * Used by `wavesurfer.seekTo()`
     *
     * @param {number} start Position to start at in seconds
     * @param {number} end Position to end at in seconds
     * @return {{start: number, end: number}} Object containing start and end
     * positions
     */

  }, {
    key: "seekTo",
    value: function seekTo(start, end) {
      if (!this.buffer) {
        return;
      }

      this.scheduledPause = null;

      if (start == null) {
        start = this.getCurrentTime();

        if (start >= this.getDuration()) {
          start = 0;
        }
      }

      if (end == null) {
        end = this.getDuration();
      }

      this.startPosition = start;
      this.lastPlay = this.ac.currentTime;

      if (this.state === this.states[FINISHED]) {
        this.setState(PAUSED);
      }

      return {
        start: start,
        end: end
      };
    }
    /**
     * Get the playback position in seconds
     *
     * @return {number} The playback position in seconds
     */

  }, {
    key: "getPlayedTime",
    value: function getPlayedTime() {
      return (this.ac.currentTime - this.lastPlay) * this.playbackRate;
    }
    /**
     * Plays the loaded audio region.
     *
     * @param {number} start Start offset in seconds, relative to the beginning
     * of a clip.
     * @param {number} end When to stop relative to the beginning of a clip.
     */

  }, {
    key: "play",
    value: function play(start, end) {
      if (!this.buffer) {
        return;
      } // need to re-create source on each playback


      this.createSource();
      var adjustedTime = this.seekTo(start, end);
      start = adjustedTime.start;
      end = adjustedTime.end;
      this.scheduledPause = end;
      this.source.start(0, start);
      this.resumeAudioContext();
      this.setState(PLAYING);
      this.fireEvent('play');
    }
    /**
     * Pauses the loaded audio.
     */

  }, {
    key: "pause",
    value: function pause() {
      this.scheduledPause = null;
      this.startPosition += this.getPlayedTime();

      try {
        this.source && this.source.stop(0);
      } catch (err) {// Calling stop can throw the following 2 errors:
        // - RangeError (The value specified for when is negative.)
        // - InvalidStateNode (The node has not been started by calling start().)
        // We can safely ignore both errors, because:
        // - The range is surely correct
        // - The node might not have been started yet, in which case we just want to carry on without causing any trouble.
      }

      this.setState(PAUSED);
      this.fireEvent('pause');
    }
    /**
     * Returns the current time in seconds relative to the audio-clip's
     * duration.
     *
     * @return {number} The current time in seconds
     */

  }, {
    key: "getCurrentTime",
    value: function getCurrentTime() {
      return this.state.getCurrentTime.call(this);
    }
    /**
     * Returns the current playback rate. (0=no playback, 1=normal playback)
     *
     * @return {number} The current playback rate
     */

  }, {
    key: "getPlaybackRate",
    value: function getPlaybackRate() {
      return this.playbackRate;
    }
    /**
     * Set the audio source playback rate.
     *
     * @param {number} value The playback rate to use
     */

  }, {
    key: "setPlaybackRate",
    value: function setPlaybackRate(value) {
      this.playbackRate = value || 1;
      this.source && this.source.playbackRate.setValueAtTime(this.playbackRate, this.ac.currentTime);
    }
    /**
     * Set a point in seconds for playback to stop at.
     *
     * @param {number} end Position to end at
     * @version 3.3.0
     */

  }, {
    key: "setPlayEnd",
    value: function setPlayEnd(end) {
      this.scheduledPause = end;
    }
  }]);

  return WebAudio;
}(util.Observer);

exports.default = WebAudio;
WebAudio.scriptBufferSize = 256;
module.exports = exports.default;

/***/ }),

/***/ "./node_modules/debounce/index.js":
/*!****************************************!*\
  !*** ./node_modules/debounce/index.js ***!
  \****************************************/
/***/ ((module) => {

/**
 * Returns a function, that, as long as it continues to be invoked, will not
 * be triggered. The function will be called after it stops being called for
 * N milliseconds. If `immediate` is passed, trigger the function on the
 * leading edge, instead of the trailing. The function also has a property 'clear' 
 * that is a function which will clear the timer to prevent previously scheduled executions. 
 *
 * @source underscore.js
 * @see http://unscriptable.com/2009/03/20/debouncing-javascript-methods/
 * @param {Function} function to wrap
 * @param {Number} timeout in ms (`100`)
 * @param {Boolean} whether to execute at the beginning (`false`)
 * @api public
 */
function debounce(func, wait, immediate){
  var timeout, args, context, timestamp, result;
  if (null == wait) wait = 100;

  function later() {
    var last = Date.now() - timestamp;

    if (last < wait && last >= 0) {
      timeout = setTimeout(later, wait - last);
    } else {
      timeout = null;
      if (!immediate) {
        result = func.apply(context, args);
        context = args = null;
      }
    }
  };

  var debounced = function(){
    context = this;
    args = arguments;
    timestamp = Date.now();
    var callNow = immediate && !timeout;
    if (!timeout) timeout = setTimeout(later, wait);
    if (callNow) {
      result = func.apply(context, args);
      context = args = null;
    }

    return result;
  };

  debounced.clear = function() {
    if (timeout) {
      clearTimeout(timeout);
      timeout = null;
    }
  };
  
  debounced.flush = function() {
    if (timeout) {
      result = func.apply(context, args);
      context = args = null;
      
      clearTimeout(timeout);
      timeout = null;
    }
  };

  return debounced;
};

// Adds compatibility for ES modules
debounce.debounce = debounce;

module.exports = debounce;


/***/ })

/******/ 	});
/************************************************************************/
/******/ 	// The module cache
/******/ 	var __webpack_module_cache__ = {};
/******/ 	
/******/ 	// The require function
/******/ 	function __nested_webpack_require_210487__(moduleId) {
/******/ 		// Check if module is in cache
/******/ 		var cachedModule = __webpack_module_cache__[moduleId];
/******/ 		if (cachedModule !== undefined) {
/******/ 			return cachedModule.exports;
/******/ 		}
/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = __webpack_module_cache__[moduleId] = {
/******/ 			// no module.id needed
/******/ 			// no module.loaded needed
/******/ 			exports: {}
/******/ 		};
/******/ 	
/******/ 		// Execute the module function
/******/ 		__webpack_modules__[moduleId](module, module.exports, __nested_webpack_require_210487__);
/******/ 	
/******/ 		// Return the exports of the module
/******/ 		return module.exports;
/******/ 	}
/******/ 	
/************************************************************************/
/******/ 	
/******/ 	// startup
/******/ 	// Load entry module and return exports
/******/ 	// This entry module is referenced by other modules so it can't be inlined
/******/ 	var __nested_webpack_exports__ = __nested_webpack_require_210487__("./src/wavesurfer.js");
/******/ 	
/******/ 	return __nested_webpack_exports__;
/******/ })()
;
});
//# sourceMappingURL=wavesurfer.js.map

/***/ }),

/***/ 2055:
/***/ ((module) => {

"use strict";
module.exports = __WEBPACK_EXTERNAL_MODULE__2055__;

/***/ }),

/***/ 8330:
/***/ ((module) => {

"use strict";
module.exports = /*#__PURE__*/JSON.parse('{"name":"canvas-summary","version":"3.6.0","description":"Providing a data overview with vega charts.","private":true,"keywords":["jupyter","jupyterlab","jupyterlab-extension","widgets"],"files":["lib/**/*.js","dist/*.js","standalone/*"],"main":"lib/index.js","types":"./lib/index.d.ts","homepage":"https://github.com/satishlokkoju/deepview","bugs":{"url":"https://github.com/satishlokkoju/deepview/issues"},"author":"Satish Lokkoju","repository":{"type":"git","url":"https://github.com/satishlokkoju/deepview"},"scripts":{"build":"webpack --mode=development --progress && jupyter labextension build --development=True .","build:prod":"webpack --mode=production && jupyter labextension build .","clean":"yarn run clean:lib && yarn run clean:nbextension && yarn run clean:labextension && yarn run clean:standalone","clean:lib":"rimraf lib","clean:labextension":"rimraf canvas_summary/labextension","clean:nbextension":"rimraf canvas_summary/nbextension/static/index.js","clean:standalone":"rimraf canvas_summary/standalone","lint":"eslint . --ext .ts,.tsx,.svelte --fix","lint:check":"eslint . --ext .ts,.tsx,.svelte","prepack":"yarn run build:prod","watch":"yarn run watch:nbextension","watch:nbextension":"webpack --watch --mode=development --progress","watch:labextension":"jupyter labextension watch .","dev":"yarn run watch & python -m http.server --directory ./canvas_summary/standalone 8082"},"dependencies":{"@betterwithdata/canvas_viz":"^1.0.0","@jupyter-widgets/base":"^1.1.10 || ^2.0.0 || ^3.0.0 || ^4.0.0","arquero":"^4.7.2"},"devDependencies":{"@fullhuman/postcss-purgecss":"^4.0.3","@jupyterlab/builder":"^3.1.12","@phosphor/application":"^1.6.0","@phosphor/widgets":"^1.6.0","@tailwindcss/forms":"^0.3.2","@tsconfig/svelte":"^2.0.1","@types/webpack-env":"^1.13.6","@typescript-eslint/eslint-plugin":"^4.31.1","@typescript-eslint/parser":"^4.31.1","@webpack-cli/serve":"^1.2.2","autoprefixer":"^10.3.4","commitizen":"^4.2.4","css-loader":"^6.2.0","css-minimizer-webpack-plugin":"^3.0.1","cz-conventional-changelog":"^3.3.0","eslint":"^7.4.0","eslint-config-prettier":"^8.1.0","eslint-plugin-prettier":"^4.0.0","mini-css-extract-plugin":"^2.3.0","mkdirp":"^1.0.4","postcss":"^8.2.10","postcss-extend":"^1.0.5","postcss-import":"^14.0.1","postcss-load-config":"^3.0.1","postcss-loader":"^6.1.0","precss":"^4.0.0","prettier":"^2.4.0","purgecss-from-svelte":"^2.0.2","rimraf":"^3.0.2","source-map-loader":"^3.0.0","style-loader":"^3.2.1","svelte":"^3.42.5","svelte-loader":"^3.1.1","svelte-preprocess":"^4.9.4","tailwindcss":"^2.2.15","ts-loader":"^9.1.0","typescript":"^4.9.0","webpack":"^5.52.1","webpack-cli":"^4.6.0","webpack-dev-server":"^4.2.1","yarn-run-all":"^3.1.1"},"jupyterlab":{"extension":"lib/index","outputDir":"canvas_summary/labextension/","sharedPackages":{"@jupyter-widgets/base":{"bundled":false,"singleton":true}}},"config":{"commitizen":{"path":"./node_modules/cz-conventional-changelog"}}}');

/***/ })

/******/ 	});
/************************************************************************/
/******/ 	// The module cache
/******/ 	var __webpack_module_cache__ = {};
/******/ 	
/******/ 	// The require function
/******/ 	function __webpack_require__(moduleId) {
/******/ 		// Check if module is in cache
/******/ 		var cachedModule = __webpack_module_cache__[moduleId];
/******/ 		if (cachedModule !== undefined) {
/******/ 			return cachedModule.exports;
/******/ 		}
/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = __webpack_module_cache__[moduleId] = {
/******/ 			// no module.id needed
/******/ 			// no module.loaded needed
/******/ 			exports: {}
/******/ 		};
/******/ 	
/******/ 		// Execute the module function
/******/ 		__webpack_modules__[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/ 	
/******/ 		// Return the exports of the module
/******/ 		return module.exports;
/******/ 	}
/******/ 	
/************************************************************************/
/******/ 	/* webpack/runtime/compat get default export */
/******/ 	(() => {
/******/ 		// getDefaultExport function for compatibility with non-harmony modules
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/******/ 				() => (module['default']) :
/******/ 				() => (module);
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/******/ 	/* webpack/runtime/define property getters */
/******/ 	(() => {
/******/ 		// define getter functions for harmony exports
/******/ 		__webpack_require__.d = (exports, definition) => {
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/******/ 	/* webpack/runtime/global */
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/******/ 			try {
/******/ 				return this || new Function('return this')();
/******/ 			} catch (e) {
/******/ 				if (typeof window === 'object') return window;
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/******/ 	/* webpack/runtime/hasOwnProperty shorthand */
/******/ 	(() => {
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var __webpack_exports__ = {};
// This entry needs to be wrapped in an IIFE because it needs to be in strict mode.
(() => {
"use strict";
// ESM COMPAT FLAG
__webpack_require__.r(__webpack_exports__);

// EXPORTS
__webpack_require__.d(__webpack_exports__, {
  CanvasSummaryModel: () => (/* reexport */ extension_CanvasSummaryModel),
  CanvasSummaryView: () => (/* reexport */ extension_CanvasSummaryView),
  MODULE_NAME: () => (/* reexport */ extension_MODULE_NAME),
  MODULE_VERSION: () => (/* reexport */ extension_MODULE_VERSION)
});

// NAMESPACE OBJECT: ../../node_modules/apache-arrow/util/buffer.mjs
var extension_buffer_namespaceObject = {};
__webpack_require__.r(extension_buffer_namespaceObject);
__webpack_require__.d(extension_buffer_namespaceObject, {
  compareArrayLike: () => (extension_compareArrayLike),
  joinUint8Arrays: () => (extension_joinUint8Arrays),
  memcpy: () => (extension_memcpy),
  rebaseValueOffsets: () => (extension_rebaseValueOffsets),
  toArrayBufferView: () => (extension_toArrayBufferView),
  toArrayBufferViewAsyncIterator: () => (extension_toArrayBufferViewAsyncIterator),
  toArrayBufferViewIterator: () => (extension_toArrayBufferViewIterator),
  toBigInt64Array: () => (extension_toBigInt64Array),
  toBigUint64Array: () => (extension_toBigUint64Array),
  toFloat32Array: () => (extension_toFloat32Array),
  toFloat32ArrayAsyncIterator: () => (extension_toFloat32ArrayAsyncIterator),
  toFloat32ArrayIterator: () => (extension_toFloat32ArrayIterator),
  toFloat64Array: () => (extension_toFloat64Array),
  toFloat64ArrayAsyncIterator: () => (extension_toFloat64ArrayAsyncIterator),
  toFloat64ArrayIterator: () => (extension_toFloat64ArrayIterator),
  toInt16Array: () => (extension_toInt16Array),
  toInt16ArrayAsyncIterator: () => (extension_toInt16ArrayAsyncIterator),
  toInt16ArrayIterator: () => (extension_toInt16ArrayIterator),
  toInt32Array: () => (extension_toInt32Array),
  toInt32ArrayAsyncIterator: () => (extension_toInt32ArrayAsyncIterator),
  toInt32ArrayIterator: () => (extension_toInt32ArrayIterator),
  toInt8Array: () => (extension_toInt8Array),
  toInt8ArrayAsyncIterator: () => (extension_toInt8ArrayAsyncIterator),
  toInt8ArrayIterator: () => (extension_toInt8ArrayIterator),
  toUint16Array: () => (extension_toUint16Array),
  toUint16ArrayAsyncIterator: () => (extension_toUint16ArrayAsyncIterator),
  toUint16ArrayIterator: () => (extension_toUint16ArrayIterator),
  toUint32Array: () => (extension_toUint32Array),
  toUint32ArrayAsyncIterator: () => (extension_toUint32ArrayAsyncIterator),
  toUint32ArrayIterator: () => (extension_toUint32ArrayIterator),
  toUint8Array: () => (extension_toUint8Array),
  toUint8ArrayAsyncIterator: () => (extension_toUint8ArrayAsyncIterator),
  toUint8ArrayIterator: () => (extension_toUint8ArrayIterator),
  toUint8ClampedArray: () => (extension_toUint8ClampedArray),
  toUint8ClampedArrayAsyncIterator: () => (extension_toUint8ClampedArrayAsyncIterator),
  toUint8ClampedArrayIterator: () => (extension_toUint8ClampedArrayIterator)
});

// NAMESPACE OBJECT: ../../node_modules/apache-arrow/util/bit.mjs
var extension_bit_namespaceObject = {};
__webpack_require__.r(extension_bit_namespaceObject);
__webpack_require__.d(extension_bit_namespaceObject, {
  getBit: () => (extension_getBit),
  getBool: () => (extension_getBool),
  iterateBits: () => (extension_iterateBits),
  packBools: () => (extension_packBools),
  popcnt_array: () => (extension_popcnt_array),
  popcnt_bit_range: () => (extension_popcnt_bit_range),
  popcnt_uint32: () => (extension_popcnt_uint32),
  setBool: () => (extension_setBool),
  truncateBitmap: () => (extension_truncateBitmap)
});

// NAMESPACE OBJECT: ../../node_modules/apache-arrow/util/math.mjs
var extension_util_math_namespaceObject = {};
__webpack_require__.r(extension_util_math_namespaceObject);
__webpack_require__.d(extension_util_math_namespaceObject, {
  float64ToUint16: () => (extension_float64ToUint16),
  uint16ToFloat64: () => (extension_uint16ToFloat64)
});

// NAMESPACE OBJECT: ../../node_modules/apache-arrow/util/bn.mjs
var extension_bn_namespaceObject = {};
__webpack_require__.r(extension_bn_namespaceObject);
__webpack_require__.d(extension_bn_namespaceObject, {
  BN: () => (extension_BN),
  bignumToBigInt: () => (extension_bignumToBigInt),
  bignumToString: () => (extension_bignumToString),
  isArrowBigNumSymbol: () => (extension_isArrowBigNumSymbol)
});

// NAMESPACE OBJECT: ../../node_modules/apache-arrow/util/vector.mjs
var extension_util_vector_namespaceObject = {};
__webpack_require__.r(extension_util_vector_namespaceObject);
__webpack_require__.d(extension_util_vector_namespaceObject, {
  clampIndex: () => (extension_clampIndex),
  clampRange: () => (extension_clampRange),
  createElementComparator: () => (extension_createElementComparator)
});

// NAMESPACE OBJECT: ../../node_modules/apache-arrow/util/int.mjs
var extension_util_int_namespaceObject = {};
__webpack_require__.r(extension_util_int_namespaceObject);
__webpack_require__.d(extension_util_int_namespaceObject, {
  BaseInt64: () => (extension_BaseInt64),
  Int128: () => (extension_Int128),
  Int64: () => (extension_int_Int64),
  Uint64: () => (extension_int_Uint64)
});

// NAMESPACE OBJECT: ../../node_modules/vega-transforms/build/vega-transforms.module.js
var extension_vega_transforms_module_namespaceObject = {};
__webpack_require__.r(extension_vega_transforms_module_namespaceObject);
__webpack_require__.d(extension_vega_transforms_module_namespaceObject, {
  aggregate: () => (extension_Aggregate),
  bin: () => (extension_Bin),
  collect: () => (extension_Collect),
  compare: () => (extension_Compare),
  countpattern: () => (extension_CountPattern),
  cross: () => (extension_Cross),
  density: () => (extension_Density),
  dotbin: () => (extension_DotBin),
  expression: () => (extension_Expression),
  extent: () => (extension_Extent),
  facet: () => (extension_Facet),
  field: () => (extension_vega_transforms_module_Field),
  filter: () => (extension_Filter),
  flatten: () => (extension_Flatten),
  fold: () => (extension_Fold),
  formula: () => (extension_Formula),
  generate: () => (extension_Generate),
  impute: () => (extension_Impute),
  joinaggregate: () => (extension_JoinAggregate),
  kde: () => (extension_KDE),
  key: () => (extension_Key),
  load: () => (extension_Load),
  lookup: () => (extension_Lookup),
  multiextent: () => (extension_MultiExtent),
  multivalues: () => (extension_MultiValues),
  params: () => (extension_Params),
  pivot: () => (extension_Pivot),
  prefacet: () => (extension_PreFacet),
  project: () => (extension_Project),
  proxy: () => (extension_vega_transforms_module_Proxy),
  quantile: () => (extension_Quantile),
  relay: () => (extension_Relay),
  sample: () => (extension_Sample),
  sequence: () => (extension_Sequence),
  sieve: () => (extension_Sieve),
  subflow: () => (extension_Subflow),
  timeunit: () => (extension_vega_transforms_module_TimeUnit),
  tupleindex: () => (extension_TupleIndex),
  values: () => (extension_Values),
  window: () => (extension_vega_transforms_module_Window)
});

// NAMESPACE OBJECT: ../../node_modules/d3-interpolate/src/index.js
var extension_d3_interpolate_src_namespaceObject = {};
__webpack_require__.r(extension_d3_interpolate_src_namespaceObject);
__webpack_require__.d(extension_d3_interpolate_src_namespaceObject, {
  interpolate: () => (extension_value),
  interpolateArray: () => (extension_d3_interpolate_src_array),
  interpolateBasis: () => (extension_src_basis),
  interpolateBasisClosed: () => (extension_src_basisClosed),
  interpolateCubehelix: () => (extension_src_cubehelix),
  interpolateCubehelixLong: () => (extension_cubehelixLong),
  interpolateDate: () => (extension_src_date),
  interpolateDiscrete: () => (extension_discrete),
  interpolateHcl: () => (extension_src_hcl),
  interpolateHclLong: () => (extension_hclLong),
  interpolateHsl: () => (extension_src_hsl),
  interpolateHslLong: () => (extension_hslLong),
  interpolateHue: () => (extension_src_hue),
  interpolateLab: () => (extension_lab_lab),
  interpolateNumber: () => (extension_src_number),
  interpolateNumberArray: () => (extension_numberArray),
  interpolateObject: () => (extension_src_object),
  interpolateRgb: () => (extension_rgb),
  interpolateRgbBasis: () => (extension_rgbBasis),
  interpolateRgbBasisClosed: () => (extension_rgbBasisClosed),
  interpolateRound: () => (extension_src_round),
  interpolateString: () => (extension_src_string),
  interpolateTransformCss: () => (extension_interpolateTransformCss),
  interpolateTransformSvg: () => (extension_interpolateTransformSvg),
  interpolateZoom: () => (extension_src_zoom),
  piecewise: () => (extension_piecewise),
  quantize: () => (extension_src_quantize)
});

// NAMESPACE OBJECT: ../../node_modules/vega-view-transforms/build/vega-view-transforms.module.js
var extension_vega_view_transforms_module_namespaceObject = {};
__webpack_require__.r(extension_vega_view_transforms_module_namespaceObject);
__webpack_require__.d(extension_vega_view_transforms_module_namespaceObject, {
  bound: () => (extension_Bound),
  identifier: () => (extension_vega_view_transforms_module_Identifier),
  mark: () => (extension_Mark),
  overlap: () => (extension_Overlap),
  render: () => (extension_Render),
  viewlayout: () => (extension_ViewLayout)
});

// NAMESPACE OBJECT: ../../node_modules/vega-encode/build/vega-encode.module.js
var extension_vega_encode_module_namespaceObject = {};
__webpack_require__.r(extension_vega_encode_module_namespaceObject);
__webpack_require__.d(extension_vega_encode_module_namespaceObject, {
  axisticks: () => (extension_AxisTicks),
  datajoin: () => (extension_DataJoin),
  encode: () => (extension_Encode),
  legendentries: () => (extension_LegendEntries),
  linkpath: () => (extension_LinkPath),
  pie: () => (extension_Pie),
  scale: () => (extension_Scale),
  sortitems: () => (extension_SortItems),
  stack: () => (extension_Stack)
});

// NAMESPACE OBJECT: ../../node_modules/vega-geo/build/vega-geo.module.js
var extension_vega_geo_module_namespaceObject = {};
__webpack_require__.r(extension_vega_geo_module_namespaceObject);
__webpack_require__.d(extension_vega_geo_module_namespaceObject, {
  contour: () => (extension_Contour),
  geojson: () => (extension_GeoJSON),
  geopath: () => (extension_GeoPath),
  geopoint: () => (extension_GeoPoint),
  geoshape: () => (extension_GeoShape),
  graticule: () => (extension_Graticule),
  heatmap: () => (extension_Heatmap),
  isocontour: () => (extension_Isocontour),
  kde2d: () => (extension_KDE2D),
  projection: () => (extension_Projection)
});

// NAMESPACE OBJECT: ../../node_modules/vega-force/build/vega-force.module.js
var extension_vega_force_module_namespaceObject = {};
__webpack_require__.r(extension_vega_force_module_namespaceObject);
__webpack_require__.d(extension_vega_force_module_namespaceObject, {
  force: () => (extension_Force)
});

// NAMESPACE OBJECT: ../../node_modules/vega-hierarchy/build/vega-hierarchy.module.js
var extension_vega_hierarchy_module_namespaceObject = {};
__webpack_require__.r(extension_vega_hierarchy_module_namespaceObject);
__webpack_require__.d(extension_vega_hierarchy_module_namespaceObject, {
  nest: () => (extension_Nest),
  pack: () => (extension_Pack),
  partition: () => (extension_Partition),
  stratify: () => (extension_Stratify),
  tree: () => (extension_Tree),
  treelinks: () => (extension_TreeLinks),
  treemap: () => (extension_Treemap)
});

// NAMESPACE OBJECT: ../../node_modules/vega-label/build/vega-label.module.js
var extension_vega_label_module_namespaceObject = {};
__webpack_require__.r(extension_vega_label_module_namespaceObject);
__webpack_require__.d(extension_vega_label_module_namespaceObject, {
  label: () => (extension_Label)
});

// NAMESPACE OBJECT: ../../node_modules/vega-regression/build/vega-regression.module.js
var extension_vega_regression_module_namespaceObject = {};
__webpack_require__.r(extension_vega_regression_module_namespaceObject);
__webpack_require__.d(extension_vega_regression_module_namespaceObject, {
  loess: () => (extension_Loess),
  regression: () => (extension_Regression)
});

// NAMESPACE OBJECT: ../../node_modules/vega-voronoi/build/vega-voronoi.module.js
var extension_vega_voronoi_module_namespaceObject = {};
__webpack_require__.r(extension_vega_voronoi_module_namespaceObject);
__webpack_require__.d(extension_vega_voronoi_module_namespaceObject, {
  voronoi: () => (extension_vega_voronoi_module_Voronoi)
});

// NAMESPACE OBJECT: ../../node_modules/vega-wordcloud/build/vega-wordcloud.module.js
var extension_vega_wordcloud_module_namespaceObject = {};
__webpack_require__.r(extension_vega_wordcloud_module_namespaceObject);
__webpack_require__.d(extension_vega_wordcloud_module_namespaceObject, {
  wordcloud: () => (extension_Wordcloud)
});

// NAMESPACE OBJECT: ../../node_modules/vega-crossfilter/build/vega-crossfilter.module.js
var extension_vega_crossfilter_module_namespaceObject = {};
__webpack_require__.r(extension_vega_crossfilter_module_namespaceObject);
__webpack_require__.d(extension_vega_crossfilter_module_namespaceObject, {
  crossfilter: () => (extension_CrossFilter),
  resolvefilter: () => (extension_ResolveFilter)
});

// NAMESPACE OBJECT: ../../node_modules/vega/build/vega.module.js
var extension_vega_module_namespaceObject = {};
__webpack_require__.r(extension_vega_module_namespaceObject);
__webpack_require__.d(extension_vega_module_namespaceObject, {
  Bounds: () => (extension_Bounds),
  CanvasHandler: () => (extension_CanvasHandler),
  CanvasRenderer: () => (extension_CanvasRenderer),
  DATE: () => (extension_DATE),
  DAY: () => (extension_DAY),
  DAYOFYEAR: () => (extension_DAYOFYEAR),
  Dataflow: () => (extension_Dataflow),
  Debug: () => (extension_vega_util_module_Debug),
  Error: () => (extension_Error$1),
  EventStream: () => (extension_EventStream),
  Gradient: () => (extension_Gradient),
  GroupItem: () => (extension_GroupItem),
  HOURS: () => (extension_HOURS),
  Handler: () => (extension_Handler),
  HybridHandler: () => (extension_HybridHandler),
  HybridRenderer: () => (extension_HybridRenderer),
  Info: () => (extension_vega_util_module_Info),
  Item: () => (extension_Item),
  MILLISECONDS: () => (extension_MILLISECONDS),
  MINUTES: () => (extension_MINUTES),
  MONTH: () => (extension_MONTH),
  Marks: () => (extension_Marks),
  MultiPulse: () => (extension_MultiPulse),
  None: () => (extension_None),
  Operator: () => (extension_Operator),
  Parameters: () => (extension_Parameters),
  Pulse: () => (extension_Pulse),
  QUARTER: () => (extension_QUARTER),
  RenderType: () => (extension_RenderType),
  Renderer: () => (extension_Renderer),
  ResourceLoader: () => (extension_ResourceLoader),
  SECONDS: () => (extension_SECONDS),
  SVGHandler: () => (extension_SVGHandler),
  SVGRenderer: () => (extension_SVGRenderer),
  SVGStringRenderer: () => (extension_SVGStringRenderer),
  Scenegraph: () => (extension_Scenegraph),
  TIME_UNITS: () => (extension_TIME_UNITS),
  Transform: () => (extension_Transform),
  View: () => (extension_View),
  WEEK: () => (extension_WEEK),
  Warn: () => (extension_vega_util_module_Warn),
  YEAR: () => (extension_YEAR),
  accessor: () => (extension_accessor),
  accessorFields: () => (extension_accessorFields),
  accessorName: () => (extension_accessorName),
  array: () => (extension_vega_util_module_array),
  ascending: () => (extension_vega_util_module_ascending),
  bandwidthNRD: () => (extension_estimateBandwidth),
  bin: () => (extension_vega_statistics_module_bin),
  bootstrapCI: () => (extension_bootstrapCI),
  boundClip: () => (extension_boundClip),
  boundContext: () => (extension_boundContext),
  boundItem: () => (extension_boundItem),
  boundMark: () => (extension_boundMark),
  boundStroke: () => (extension_boundStroke),
  changeset: () => (extension_changeset),
  clampRange: () => (extension_vega_util_module_clampRange),
  codegenExpression: () => (extension_vega_expression_module_codegen),
  compare: () => (extension_vega_util_module_compare),
  constant: () => (extension_vega_util_module_constant),
  cumulativeLogNormal: () => (extension_cumulativeLogNormal),
  cumulativeNormal: () => (extension_cumulativeNormal),
  cumulativeUniform: () => (extension_cumulativeUniform),
  dayofyear: () => (extension_vega_time_module_dayofyear),
  debounce: () => (extension_debounce),
  defaultLocale: () => (extension_vega_format_module_defaultLocale),
  definition: () => (extension_definition),
  densityLogNormal: () => (extension_densityLogNormal),
  densityNormal: () => (extension_densityNormal),
  densityUniform: () => (extension_densityUniform),
  domChild: () => (extension_domChild),
  domClear: () => (extension_domClear),
  domCreate: () => (extension_domCreate),
  domFind: () => (extension_domFind),
  dotbin: () => (extension_dotbin),
  error: () => (extension_vega_util_module_error),
  expressionFunction: () => (extension_expressionFunction),
  extend: () => (extension_extend),
  extent: () => (extension_extent),
  extentIndex: () => (extension_extentIndex),
  falsy: () => (extension_falsy),
  fastmap: () => (extension_fastmap),
  field: () => (extension_vega_util_module_field),
  flush: () => (extension_vega_util_module_flush),
  font: () => (extension_font),
  fontFamily: () => (extension_fontFamily),
  fontSize: () => (extension_fontSize),
  format: () => (extension_vega_loader_browser_module_format),
  formatLocale: () => (extension_numberFormatDefaultLocale),
  formats: () => (extension_vega_loader_browser_module_formats),
  hasOwnProperty: () => (extension_vega_util_module_has),
  id: () => (extension_id),
  identity: () => (extension_vega_util_module_identity),
  inferType: () => (extension_inferType),
  inferTypes: () => (extension_inferTypes),
  ingest: () => (extension_ingest$1),
  inherits: () => (extension_inherits),
  inrange: () => (extension_inrange),
  interpolate: () => (extension_interpolate),
  interpolateColors: () => (extension_interpolateColors),
  interpolateRange: () => (extension_interpolateRange),
  intersect: () => (extension_vega_scenegraph_module_intersect),
  intersectBoxLine: () => (extension_intersectBoxLine),
  intersectPath: () => (extension_intersectPath),
  intersectPoint: () => (extension_intersectPoint),
  intersectRule: () => (extension_intersectRule),
  isArray: () => (extension_vega_util_module_isArray),
  isBoolean: () => (extension_vega_util_module_isBoolean),
  isDate: () => (extension_isDate),
  isFunction: () => (extension_vega_util_module_isFunction),
  isIterable: () => (extension_vega_util_module_isIterable),
  isNumber: () => (extension_vega_util_module_isNumber),
  isObject: () => (extension_vega_util_module_isObject),
  isRegExp: () => (extension_isRegExp),
  isString: () => (extension_vega_util_module_isString),
  isTuple: () => (extension_isTuple),
  key: () => (extension_vega_util_module_key),
  lerp: () => (extension_lerp),
  lineHeight: () => (extension_lineHeight),
  loader: () => (extension_loader),
  locale: () => (extension_vega_format_module_locale),
  logger: () => (extension_logger),
  lruCache: () => (extension_lruCache),
  markup: () => (extension_markup),
  merge: () => (extension_merge),
  mergeConfig: () => (extension_mergeConfig),
  multiLineOffset: () => (extension_multiLineOffset),
  one: () => (extension_one),
  pad: () => (extension_vega_util_module_pad),
  panLinear: () => (extension_panLinear),
  panLog: () => (extension_panLog),
  panPow: () => (extension_panPow),
  panSymlog: () => (extension_panSymlog),
  parse: () => (extension_vega_parser_module_parse),
  parseExpression: () => (extension_parser),
  parseSelector: () => (extension_eventSelector),
  path: () => (extension_path),
  pathCurves: () => (extension_curves),
  pathEqual: () => (extension_pathEqual),
  pathParse: () => (extension_vega_scenegraph_module_parse),
  pathRectangle: () => (extension_vg_rect),
  pathRender: () => (extension_pathRender),
  pathSymbols: () => (extension_vega_scenegraph_module_symbols),
  pathTrail: () => (extension_vg_trail),
  peek: () => (extension_peek),
  point: () => (extension_vega_scenegraph_module_point),
  projection: () => (extension_vega_projection_module_projection),
  quantileLogNormal: () => (extension_quantileLogNormal),
  quantileNormal: () => (extension_quantileNormal),
  quantileUniform: () => (extension_quantileUniform),
  quantiles: () => (extension_quantiles),
  quantizeInterpolator: () => (extension_quantizeInterpolator),
  quarter: () => (extension_quarter),
  quartiles: () => (extension_quartiles),
  random: () => (extension_vega_statistics_module_random),
  randomInteger: () => (extension_integer),
  randomKDE: () => (extension_kde),
  randomLCG: () => (extension_vega_statistics_module_lcg),
  randomLogNormal: () => (extension_lognormal),
  randomMixture: () => (extension_mixture),
  randomNormal: () => (extension_gaussian),
  randomUniform: () => (extension_uniform),
  read: () => (extension_read),
  regressionConstant: () => (extension_vega_statistics_module_constant),
  regressionExp: () => (extension_vega_statistics_module_exp),
  regressionLinear: () => (extension_linear),
  regressionLoess: () => (extension_loess),
  regressionLog: () => (extension_vega_statistics_module_log),
  regressionPoly: () => (extension_poly),
  regressionPow: () => (extension_vega_statistics_module_pow),
  regressionQuad: () => (extension_quad),
  renderModule: () => (extension_renderModule),
  repeat: () => (extension_vega_util_module_repeat),
  resetDefaultLocale: () => (extension_resetDefaultLocale),
  resetSVGClipId: () => (extension_resetSVGClipId),
  resetSVGDefIds: () => (extension_resetSVGDefIds),
  responseType: () => (extension_responseType),
  runtimeContext: () => (extension_vega_runtime_module_context),
  sampleCurve: () => (extension_sampleCurve),
  sampleLogNormal: () => (extension_sampleLogNormal),
  sampleNormal: () => (extension_sampleNormal),
  sampleUniform: () => (extension_sampleUniform),
  scale: () => (extension_vega_scale_module_scale),
  sceneEqual: () => (extension_sceneEqual),
  sceneFromJSON: () => (extension_sceneFromJSON),
  scenePickVisit: () => (extension_pickVisit),
  sceneToJSON: () => (extension_sceneToJSON),
  sceneVisit: () => (extension_vega_scenegraph_module_visit),
  sceneZOrder: () => (extension_zorder),
  scheme: () => (extension_scheme),
  serializeXML: () => (extension_serializeXML),
  setHybridRendererOptions: () => (extension_setHybridRendererOptions),
  setRandom: () => (extension_setRandom),
  span: () => (extension_span),
  splitAccessPath: () => (extension_splitAccessPath),
  stringValue: () => (extension_$),
  textMetrics: () => (extension_textMetrics),
  timeBin: () => (extension_vega_time_module_bin),
  timeFloor: () => (extension_timeFloor),
  timeFormatLocale: () => (extension_timeFormatDefaultLocale),
  timeInterval: () => (extension_vega_time_module_timeInterval),
  timeOffset: () => (extension_timeOffset),
  timeSequence: () => (extension_timeSequence),
  timeUnitSpecifier: () => (extension_timeUnitSpecifier),
  timeUnits: () => (extension_timeUnits),
  toBoolean: () => (extension_toBoolean),
  toDate: () => (extension_toDate),
  toNumber: () => (extension_toNumber),
  toSet: () => (extension_toSet),
  toString: () => (extension_vega_util_module_toString),
  transform: () => (extension_vega_dataflow_module_transform),
  transforms: () => (extension_transforms),
  truncate: () => (extension_truncate),
  truthy: () => (extension_truthy),
  tupleid: () => (extension_tupleid),
  typeParsers: () => (extension_typeParsers),
  utcFloor: () => (extension_utcFloor),
  utcInterval: () => (extension_utcInterval),
  utcOffset: () => (extension_utcOffset),
  utcSequence: () => (extension_utcSequence),
  utcdayofyear: () => (extension_vega_time_module_utcdayofyear),
  utcquarter: () => (extension_utcquarter),
  utcweek: () => (extension_vega_time_module_utcweek),
  version: () => (extension_vega_module_version),
  visitArray: () => (extension_visitArray),
  week: () => (extension_vega_time_module_week),
  writeConfig: () => (extension_writeConfig),
  zero: () => (extension_zero),
  zoomLinear: () => (extension_zoomLinear),
  zoomLog: () => (extension_zoomLog),
  zoomPow: () => (extension_zoomPow),
  zoomSymlog: () => (extension_zoomSymlog)
});

// NAMESPACE OBJECT: ../../node_modules/vega-lite/build/src/index.js
var extension_build_src_namespaceObject = {};
__webpack_require__.r(extension_build_src_namespaceObject);
__webpack_require__.d(extension_build_src_namespaceObject, {
  accessPathDepth: () => (extension_accessPathDepth),
  accessPathWithDatum: () => (extension_accessPathWithDatum),
  accessWithDatumToUnescapedPath: () => (extension_accessWithDatumToUnescapedPath),
  compile: () => (extension_compile_compile),
  contains: () => (extension_util_contains),
  deepEqual: () => (extension_util_deepEqual),
  deleteNestedProperty: () => (extension_deleteNestedProperty),
  duplicate: () => (extension_duplicate),
  entries: () => (extension_util_entries),
  every: () => (extension_every),
  fieldIntersection: () => (extension_fieldIntersection),
  flatAccessWithDatum: () => (extension_flatAccessWithDatum),
  getFirstDefined: () => (extension_getFirstDefined),
  hasIntersection: () => (extension_hasIntersection),
  hasProperty: () => (extension_util_hasProperty),
  hash: () => (extension_util_hash),
  internalField: () => (extension_internalField),
  isBoolean: () => (extension_util_isBoolean),
  isEmpty: () => (extension_isEmpty),
  isEqual: () => (extension_isEqual),
  isInternalField: () => (extension_isInternalField),
  isNullOrFalse: () => (extension_isNullOrFalse),
  isNumeric: () => (extension_isNumeric),
  keys: () => (extension_util_keys),
  logicalExpr: () => (extension_logicalExpr),
  mergeDeep: () => (extension_mergeDeep),
  never: () => (extension_never),
  normalize: () => (extension_normalize_normalize),
  normalizeAngle: () => (extension_normalizeAngle),
  omit: () => (extension_omit),
  pick: () => (extension_util_pick),
  prefixGenerator: () => (extension_prefixGenerator),
  removePathFromField: () => (extension_removePathFromField),
  replaceAll: () => (extension_replaceAll),
  replacePathInField: () => (extension_replacePathInField),
  resetIdCounter: () => (extension_resetIdCounter),
  setEqual: () => (extension_setEqual),
  some: () => (extension_some),
  stringify: () => (extension_util_stringify),
  titleCase: () => (extension_titleCase),
  unique: () => (extension_unique),
  uniqueId: () => (extension_uniqueId),
  vals: () => (extension_vals),
  varName: () => (extension_varName),
  version: () => (extension_build_src_version)
});

// NAMESPACE OBJECT: ../../node_modules/vega-themes/build/vega-themes.module.js
var extension_vega_themes_module_namespaceObject = {};
__webpack_require__.r(extension_vega_themes_module_namespaceObject);
__webpack_require__.d(extension_vega_themes_module_namespaceObject, {
  carbong10: () => (extension_carbong10),
  carbong100: () => (extension_carbong100),
  carbong90: () => (extension_carbong90),
  carbonwhite: () => (extension_carbonwhite),
  dark: () => (extension_darkTheme),
  excel: () => (extension_excelTheme),
  fivethirtyeight: () => (extension_fiveThirtyEightTheme),
  ggplot2: () => (extension_ggplot2Theme),
  googlecharts: () => (extension_googlechartsTheme),
  latimes: () => (extension_latimesTheme),
  powerbi: () => (extension_powerbiTheme),
  quartz: () => (extension_quartzTheme),
  urbaninstitute: () => (extension_urbanInstituteTheme),
  version: () => (extension_vega_themes_module_version),
  vox: () => (extension_voxTheme)
});

;// ./src/version.ts
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// eslint-disable-next-line @typescript-eslint/no-var-requires
const extension_data = __webpack_require__(8330);
/**
 * The _model_module_version/_view_module_version this package implements.
 *
 * The html widget manager assumes that this is the same as the npm package
 * version number.
 */
const extension_MODULE_VERSION = extension_data.version;
/*
 * The current package name.
 */
const extension_MODULE_NAME = extension_data.name;

// EXTERNAL MODULE: external "@jupyter-widgets/base"
var extension_base_ = __webpack_require__(2055);
;// ../../canvas_viz/dist/index.js
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */






const extension_serializers = Object.assign(Object.assign({}, extension_base_.DOMWidgetModel.serializers), { table: {
        serialize: (value) => {
            return new DataView(value.buffer.slice(0));
        },
    } });

;// ../../node_modules/svelte/internal/index.mjs
function extension_noop() { }
const extension_internal_identity = x => x;
function extension_internal_assign(tar, src) {
    // @ts-ignore
    for (const k in src)
        tar[k] = src[k];
    return tar;
}
// Adapted from https://github.com/then/is-promise/blob/master/index.js
// Distributed under MIT License https://github.com/then/is-promise/blob/master/LICENSE
function extension_is_promise(value) {
    return !!value && (typeof value === 'object' || typeof value === 'function') && typeof value.then === 'function';
}
function extension_add_location(element, file, line, column, char) {
    element.__svelte_meta = {
        loc: { file, line, column, char }
    };
}
function extension_run(fn) {
    return fn();
}
function extension_blank_object() {
    return Object.create(null);
}
function extension_run_all(fns) {
    fns.forEach(extension_run);
}
function extension_internal_is_function(thing) {
    return typeof thing === 'function';
}
function extension_safe_not_equal(a, b) {
    return a != a ? b == b : a !== b || ((a && typeof a === 'object') || typeof a === 'function');
}
let extension_src_url_equal_anchor;
function extension_src_url_equal(element_src, url) {
    if (!extension_src_url_equal_anchor) {
        extension_src_url_equal_anchor = document.createElement('a');
    }
    extension_src_url_equal_anchor.href = url;
    return element_src === extension_src_url_equal_anchor.href;
}
function extension_not_equal(a, b) {
    return a != a ? b == b : a !== b;
}
function extension_is_empty(obj) {
    return Object.keys(obj).length === 0;
}
function extension_validate_store(store, name) {
    if (store != null && typeof store.subscribe !== 'function') {
        throw new Error(`'${name}' is not a store with a 'subscribe' method`);
    }
}
function extension_subscribe(store, ...callbacks) {
    if (store == null) {
        return extension_noop;
    }
    const unsub = store.subscribe(...callbacks);
    return unsub.unsubscribe ? () => unsub.unsubscribe() : unsub;
}
function extension_get_store_value(store) {
    let value;
    extension_subscribe(store, _ => value = _)();
    return value;
}
function extension_component_subscribe(component, store, callback) {
    component.$$.on_destroy.push(extension_subscribe(store, callback));
}
function extension_create_slot(definition, ctx, $$scope, fn) {
    if (definition) {
        const slot_ctx = extension_get_slot_context(definition, ctx, $$scope, fn);
        return definition[0](slot_ctx);
    }
}
function extension_get_slot_context(definition, ctx, $$scope, fn) {
    return definition[1] && fn
        ? extension_internal_assign($$scope.ctx.slice(), definition[1](fn(ctx)))
        : $$scope.ctx;
}
function extension_get_slot_changes(definition, $$scope, dirty, fn) {
    if (definition[2] && fn) {
        const lets = definition[2](fn(dirty));
        if ($$scope.dirty === undefined) {
            return lets;
        }
        if (typeof lets === 'object') {
            const merged = [];
            const len = Math.max($$scope.dirty.length, lets.length);
            for (let i = 0; i < len; i += 1) {
                merged[i] = $$scope.dirty[i] | lets[i];
            }
            return merged;
        }
        return $$scope.dirty | lets;
    }
    return $$scope.dirty;
}
function extension_update_slot_base(slot, slot_definition, ctx, $$scope, slot_changes, get_slot_context_fn) {
    if (slot_changes) {
        const slot_context = extension_get_slot_context(slot_definition, ctx, $$scope, get_slot_context_fn);
        slot.p(slot_context, slot_changes);
    }
}
function extension_update_slot(slot, slot_definition, ctx, $$scope, dirty, get_slot_changes_fn, get_slot_context_fn) {
    const slot_changes = extension_get_slot_changes(slot_definition, $$scope, dirty, get_slot_changes_fn);
    extension_update_slot_base(slot, slot_definition, ctx, $$scope, slot_changes, get_slot_context_fn);
}
function extension_get_all_dirty_from_scope($$scope) {
    if ($$scope.ctx.length > 32) {
        const dirty = [];
        const length = $$scope.ctx.length / 32;
        for (let i = 0; i < length; i++) {
            dirty[i] = -1;
        }
        return dirty;
    }
    return -1;
}
function extension_exclude_internal_props(props) {
    const result = {};
    for (const k in props)
        if (k[0] !== '$')
            result[k] = props[k];
    return result;
}
function extension_compute_rest_props(props, keys) {
    const rest = {};
    keys = new Set(keys);
    for (const k in props)
        if (!keys.has(k) && k[0] !== '$')
            rest[k] = props[k];
    return rest;
}
function extension_compute_slots(slots) {
    const result = {};
    for (const key in slots) {
        result[key] = true;
    }
    return result;
}
function extension_once(fn) {
    let ran = false;
    return function (...args) {
        if (ran)
            return;
        ran = true;
        fn.call(this, ...args);
    };
}
function extension_null_to_empty(value) {
    return value == null ? '' : value;
}
function extension_set_store_value(store, ret, value) {
    store.set(value);
    return ret;
}
const extension_has_prop = (obj, prop) => Object.prototype.hasOwnProperty.call(obj, prop);
function extension_action_destroyer(action_result) {
    return action_result && extension_internal_is_function(action_result.destroy) ? action_result.destroy : extension_noop;
}
function extension_internal_split_css_unit(value) {
    const split = typeof value === 'string' && value.match(/^\s*(-?[\d.]+)([^\s]*)\s*$/);
    return split ? [parseFloat(split[1]), split[2] || 'px'] : [value, 'px'];
}
const extension_contenteditable_truthy_values = (/* unused pure expression or super */ null && (['', true, 1, 'true', 'contenteditable']));

const extension_is_client = typeof window !== 'undefined';
let extension_now = extension_is_client
    ? () => window.performance.now()
    : () => Date.now();
let extension_raf = extension_is_client ? cb => requestAnimationFrame(cb) : extension_noop;
// used internally for testing
function extension_set_now(fn) {
    extension_now = fn;
}
function extension_set_raf(fn) {
    extension_raf = fn;
}

const extension_tasks = new Set();
function extension_run_tasks(now) {
    extension_tasks.forEach(task => {
        if (!task.c(now)) {
            extension_tasks.delete(task);
            task.f();
        }
    });
    if (extension_tasks.size !== 0)
        extension_raf(extension_run_tasks);
}
/**
 * For testing purposes only!
 */
function extension_clear_loops() {
    extension_tasks.clear();
}
/**
 * Creates a new task that runs on each raf frame
 * until it returns a falsy value or is aborted
 */
function extension_loop(callback) {
    let task;
    if (extension_tasks.size === 0)
        extension_raf(extension_run_tasks);
    return {
        promise: new Promise(fulfill => {
            extension_tasks.add(task = { c: callback, f: fulfill });
        }),
        abort() {
            extension_tasks.delete(task);
        }
    };
}

const extension_globals = (typeof window !== 'undefined'
    ? window
    : typeof globalThis !== 'undefined'
        ? globalThis
        : global);

/**
 * Resize observer singleton.
 * One listener per element only!
 * https://groups.google.com/a/chromium.org/g/blink-dev/c/z6ienONUb5A/m/F5-VcUZtBAAJ
 */
class extension_ResizeObserverSingleton {
    constructor(options) {
        this.options = options;
        this._listeners = 'WeakMap' in extension_globals ? new WeakMap() : undefined;
    }
    observe(element, listener) {
        this._listeners.set(element, listener);
        this._getObserver().observe(element, this.options);
        return () => {
            this._listeners.delete(element);
            this._observer.unobserve(element); // this line can probably be removed
        };
    }
    _getObserver() {
        var _a;
        return (_a = this._observer) !== null && _a !== void 0 ? _a : (this._observer = new ResizeObserver((entries) => {
            var _a;
            for (const entry of entries) {
                extension_ResizeObserverSingleton.entries.set(entry.target, entry);
                (_a = this._listeners.get(entry.target)) === null || _a === void 0 ? void 0 : _a(entry);
            }
        }));
    }
}
// Needs to be written like this to pass the tree-shake-test
extension_ResizeObserverSingleton.entries = 'WeakMap' in extension_globals ? new WeakMap() : undefined;

// Track which nodes are claimed during hydration. Unclaimed nodes can then be removed from the DOM
// at the end of hydration without touching the remaining nodes.
let extension_is_hydrating = false;
function extension_start_hydrating() {
    extension_is_hydrating = true;
}
function extension_end_hydrating() {
    extension_is_hydrating = false;
}
function extension_upper_bound(low, high, key, value) {
    // Return first index of value larger than input value in the range [low, high)
    while (low < high) {
        const mid = low + ((high - low) >> 1);
        if (key(mid) <= value) {
            low = mid + 1;
        }
        else {
            high = mid;
        }
    }
    return low;
}
function extension_init_hydrate(target) {
    if (target.hydrate_init)
        return;
    target.hydrate_init = true;
    // We know that all children have claim_order values since the unclaimed have been detached if target is not <head>
    let children = target.childNodes;
    // If target is <head>, there may be children without claim_order
    if (target.nodeName === 'HEAD') {
        const myChildren = [];
        for (let i = 0; i < children.length; i++) {
            const node = children[i];
            if (node.claim_order !== undefined) {
                myChildren.push(node);
            }
        }
        children = myChildren;
    }
    /*
    * Reorder claimed children optimally.
    * We can reorder claimed children optimally by finding the longest subsequence of
    * nodes that are already claimed in order and only moving the rest. The longest
    * subsequence of nodes that are claimed in order can be found by
    * computing the longest increasing subsequence of .claim_order values.
    *
    * This algorithm is optimal in generating the least amount of reorder operations
    * possible.
    *
    * Proof:
    * We know that, given a set of reordering operations, the nodes that do not move
    * always form an increasing subsequence, since they do not move among each other
    * meaning that they must be already ordered among each other. Thus, the maximal
    * set of nodes that do not move form a longest increasing subsequence.
    */
    // Compute longest increasing subsequence
    // m: subsequence length j => index k of smallest value that ends an increasing subsequence of length j
    const m = new Int32Array(children.length + 1);
    // Predecessor indices + 1
    const p = new Int32Array(children.length);
    m[0] = -1;
    let longest = 0;
    for (let i = 0; i < children.length; i++) {
        const current = children[i].claim_order;
        // Find the largest subsequence length such that it ends in a value less than our current value
        // upper_bound returns first greater value, so we subtract one
        // with fast path for when we are on the current longest subsequence
        const seqLen = ((longest > 0 && children[m[longest]].claim_order <= current) ? longest + 1 : extension_upper_bound(1, longest, idx => children[m[idx]].claim_order, current)) - 1;
        p[i] = m[seqLen] + 1;
        const newLen = seqLen + 1;
        // We can guarantee that current is the smallest value. Otherwise, we would have generated a longer sequence.
        m[newLen] = i;
        longest = Math.max(newLen, longest);
    }
    // The longest increasing subsequence of nodes (initially reversed)
    const lis = [];
    // The rest of the nodes, nodes that will be moved
    const toMove = [];
    let last = children.length - 1;
    for (let cur = m[longest] + 1; cur != 0; cur = p[cur - 1]) {
        lis.push(children[cur - 1]);
        for (; last >= cur; last--) {
            toMove.push(children[last]);
        }
        last--;
    }
    for (; last >= 0; last--) {
        toMove.push(children[last]);
    }
    lis.reverse();
    // We sort the nodes being moved to guarantee that their insertion order matches the claim order
    toMove.sort((a, b) => a.claim_order - b.claim_order);
    // Finally, we move the nodes
    for (let i = 0, j = 0; i < toMove.length; i++) {
        while (j < lis.length && toMove[i].claim_order >= lis[j].claim_order) {
            j++;
        }
        const anchor = j < lis.length ? lis[j] : null;
        target.insertBefore(toMove[i], anchor);
    }
}
function extension_append(target, node) {
    target.appendChild(node);
}
function extension_append_styles(target, style_sheet_id, styles) {
    const append_styles_to = extension_get_root_for_style(target);
    if (!append_styles_to.getElementById(style_sheet_id)) {
        const style = extension_internal_element('style');
        style.id = style_sheet_id;
        style.textContent = styles;
        extension_append_stylesheet(append_styles_to, style);
    }
}
function extension_get_root_for_style(node) {
    if (!node)
        return document;
    const root = node.getRootNode ? node.getRootNode() : node.ownerDocument;
    if (root && root.host) {
        return root;
    }
    return node.ownerDocument;
}
function extension_append_empty_stylesheet(node) {
    const style_element = extension_internal_element('style');
    extension_append_stylesheet(extension_get_root_for_style(node), style_element);
    return style_element.sheet;
}
function extension_append_stylesheet(node, style) {
    extension_append(node.head || node, style);
    return style.sheet;
}
function extension_append_hydration(target, node) {
    if (extension_is_hydrating) {
        extension_init_hydrate(target);
        if ((target.actual_end_child === undefined) || ((target.actual_end_child !== null) && (target.actual_end_child.parentNode !== target))) {
            target.actual_end_child = target.firstChild;
        }
        // Skip nodes of undefined ordering
        while ((target.actual_end_child !== null) && (target.actual_end_child.claim_order === undefined)) {
            target.actual_end_child = target.actual_end_child.nextSibling;
        }
        if (node !== target.actual_end_child) {
            // We only insert if the ordering of this node should be modified or the parent node is not target
            if (node.claim_order !== undefined || node.parentNode !== target) {
                target.insertBefore(node, target.actual_end_child);
            }
        }
        else {
            target.actual_end_child = node.nextSibling;
        }
    }
    else if (node.parentNode !== target || node.nextSibling !== null) {
        target.appendChild(node);
    }
}
function extension_insert(target, node, anchor) {
    target.insertBefore(node, anchor || null);
}
function extension_insert_hydration(target, node, anchor) {
    if (extension_is_hydrating && !anchor) {
        extension_append_hydration(target, node);
    }
    else if (node.parentNode !== target || node.nextSibling != anchor) {
        target.insertBefore(node, anchor || null);
    }
}
function extension_detach(node) {
    if (node.parentNode) {
        node.parentNode.removeChild(node);
    }
}
function extension_destroy_each(iterations, detaching) {
    for (let i = 0; i < iterations.length; i += 1) {
        if (iterations[i])
            iterations[i].d(detaching);
    }
}
function extension_internal_element(name) {
    return document.createElement(name);
}
function extension_element_is(name, is) {
    return document.createElement(name, { is });
}
function extension_object_without_properties(obj, exclude) {
    const target = {};
    for (const k in obj) {
        if (extension_has_prop(obj, k)
            // @ts-ignore
            && exclude.indexOf(k) === -1) {
            // @ts-ignore
            target[k] = obj[k];
        }
    }
    return target;
}
function extension_svg_element(name) {
    return document.createElementNS('http://www.w3.org/2000/svg', name);
}
function extension_internal_text(data) {
    return document.createTextNode(data);
}
function extension_space() {
    return extension_internal_text(' ');
}
function extension_empty() {
    return extension_internal_text('');
}
function extension_comment(content) {
    return document.createComment(content);
}
function extension_listen(node, event, handler, options) {
    node.addEventListener(event, handler, options);
    return () => node.removeEventListener(event, handler, options);
}
function extension_prevent_default(fn) {
    return function (event) {
        event.preventDefault();
        // @ts-ignore
        return fn.call(this, event);
    };
}
function extension_stop_propagation(fn) {
    return function (event) {
        event.stopPropagation();
        // @ts-ignore
        return fn.call(this, event);
    };
}
function extension_stop_immediate_propagation(fn) {
    return function (event) {
        event.stopImmediatePropagation();
        // @ts-ignore
        return fn.call(this, event);
    };
}
function extension_internal_self(fn) {
    return function (event) {
        // @ts-ignore
        if (event.target === this)
            fn.call(this, event);
    };
}
function extension_trusted(fn) {
    return function (event) {
        // @ts-ignore
        if (event.isTrusted)
            fn.call(this, event);
    };
}
function extension_attr(node, attribute, value) {
    if (value == null)
        node.removeAttribute(attribute);
    else if (node.getAttribute(attribute) !== value)
        node.setAttribute(attribute, value);
}
/**
 * List of attributes that should always be set through the attr method,
 * because updating them through the property setter doesn't work reliably.
 * In the example of `width`/`height`, the problem is that the setter only
 * accepts numeric values, but the attribute can also be set to a string like `50%`.
 * If this list becomes too big, rethink this approach.
 */
const extension_always_set_through_set_attribute = (/* unused pure expression or super */ null && (['width', 'height']));
function extension_set_attributes(node, attributes) {
    // @ts-ignore
    const descriptors = Object.getOwnPropertyDescriptors(node.__proto__);
    for (const key in attributes) {
        if (attributes[key] == null) {
            node.removeAttribute(key);
        }
        else if (key === 'style') {
            node.style.cssText = attributes[key];
        }
        else if (key === '__value') {
            node.value = node[key] = attributes[key];
        }
        else if (descriptors[key] && descriptors[key].set && extension_always_set_through_set_attribute.indexOf(key) === -1) {
            node[key] = attributes[key];
        }
        else {
            extension_attr(node, key, attributes[key]);
        }
    }
}
function extension_set_svg_attributes(node, attributes) {
    for (const key in attributes) {
        extension_attr(node, key, attributes[key]);
    }
}
function extension_set_custom_element_data_map(node, data_map) {
    Object.keys(data_map).forEach((key) => {
        extension_set_custom_element_data(node, key, data_map[key]);
    });
}
function extension_set_custom_element_data(node, prop, value) {
    if (prop in node) {
        node[prop] = typeof node[prop] === 'boolean' && value === '' ? true : value;
    }
    else {
        extension_attr(node, prop, value);
    }
}
function extension_set_dynamic_element_data(tag) {
    return (/-/.test(tag)) ? extension_set_custom_element_data_map : extension_set_attributes;
}
function extension_xlink_attr(node, attribute, value) {
    node.setAttributeNS('http://www.w3.org/1999/xlink', attribute, value);
}
function extension_get_binding_group_value(group, __value, checked) {
    const value = new Set();
    for (let i = 0; i < group.length; i += 1) {
        if (group[i].checked)
            value.add(group[i].__value);
    }
    if (!checked) {
        value.delete(__value);
    }
    return Array.from(value);
}
function extension_init_binding_group(group) {
    let _inputs;
    return {
        /* push */ p(...inputs) {
            _inputs = inputs;
            _inputs.forEach(input => group.push(input));
        },
        /* remove */ r() {
            _inputs.forEach(input => group.splice(group.indexOf(input), 1));
        }
    };
}
function extension_init_binding_group_dynamic(group, indexes) {
    let _group = get_binding_group(group);
    let _inputs;
    function get_binding_group(group) {
        for (let i = 0; i < indexes.length; i++) {
            group = group[indexes[i]] = group[indexes[i]] || [];
        }
        return group;
    }
    function push() {
        _inputs.forEach(input => _group.push(input));
    }
    function remove() {
        _inputs.forEach(input => _group.splice(_group.indexOf(input), 1));
    }
    return {
        /* update */ u(new_indexes) {
            indexes = new_indexes;
            const new_group = get_binding_group(group);
            if (new_group !== _group) {
                remove();
                _group = new_group;
                push();
            }
        },
        /* push */ p(...inputs) {
            _inputs = inputs;
            push();
        },
        /* remove */ r: remove
    };
}
function extension_to_number(value) {
    return value === '' ? null : +value;
}
function extension_time_ranges_to_array(ranges) {
    const array = [];
    for (let i = 0; i < ranges.length; i += 1) {
        array.push({ start: ranges.start(i), end: ranges.end(i) });
    }
    return array;
}
function extension_children(element) {
    return Array.from(element.childNodes);
}
function extension_init_claim_info(nodes) {
    if (nodes.claim_info === undefined) {
        nodes.claim_info = { last_index: 0, total_claimed: 0 };
    }
}
function extension_claim_node(nodes, predicate, processNode, createNode, dontUpdateLastIndex = false) {
    // Try to find nodes in an order such that we lengthen the longest increasing subsequence
    extension_init_claim_info(nodes);
    const resultNode = (() => {
        // We first try to find an element after the previous one
        for (let i = nodes.claim_info.last_index; i < nodes.length; i++) {
            const node = nodes[i];
            if (predicate(node)) {
                const replacement = processNode(node);
                if (replacement === undefined) {
                    nodes.splice(i, 1);
                }
                else {
                    nodes[i] = replacement;
                }
                if (!dontUpdateLastIndex) {
                    nodes.claim_info.last_index = i;
                }
                return node;
            }
        }
        // Otherwise, we try to find one before
        // We iterate in reverse so that we don't go too far back
        for (let i = nodes.claim_info.last_index - 1; i >= 0; i--) {
            const node = nodes[i];
            if (predicate(node)) {
                const replacement = processNode(node);
                if (replacement === undefined) {
                    nodes.splice(i, 1);
                }
                else {
                    nodes[i] = replacement;
                }
                if (!dontUpdateLastIndex) {
                    nodes.claim_info.last_index = i;
                }
                else if (replacement === undefined) {
                    // Since we spliced before the last_index, we decrease it
                    nodes.claim_info.last_index--;
                }
                return node;
            }
        }
        // If we can't find any matching node, we create a new one
        return createNode();
    })();
    resultNode.claim_order = nodes.claim_info.total_claimed;
    nodes.claim_info.total_claimed += 1;
    return resultNode;
}
function extension_claim_element_base(nodes, name, attributes, create_element) {
    return extension_claim_node(nodes, (node) => node.nodeName === name, (node) => {
        const remove = [];
        for (let j = 0; j < node.attributes.length; j++) {
            const attribute = node.attributes[j];
            if (!attributes[attribute.name]) {
                remove.push(attribute.name);
            }
        }
        remove.forEach(v => node.removeAttribute(v));
        return undefined;
    }, () => create_element(name));
}
function extension_claim_element(nodes, name, attributes) {
    return extension_claim_element_base(nodes, name, attributes, extension_internal_element);
}
function extension_claim_svg_element(nodes, name, attributes) {
    return extension_claim_element_base(nodes, name, attributes, extension_svg_element);
}
function extension_claim_text(nodes, data) {
    return extension_claim_node(nodes, (node) => node.nodeType === 3, (node) => {
        const dataStr = '' + data;
        if (node.data.startsWith(dataStr)) {
            if (node.data.length !== dataStr.length) {
                return node.splitText(dataStr.length);
            }
        }
        else {
            node.data = dataStr;
        }
    }, () => extension_internal_text(data), true // Text nodes should not update last index since it is likely not worth it to eliminate an increasing subsequence of actual elements
    );
}
function extension_claim_space(nodes) {
    return extension_claim_text(nodes, ' ');
}
function extension_claim_comment(nodes, data) {
    return extension_claim_node(nodes, (node) => node.nodeType === 8, (node) => {
        node.data = '' + data;
        return undefined;
    }, () => extension_comment(data), true);
}
function extension_find_comment(nodes, text, start) {
    for (let i = start; i < nodes.length; i += 1) {
        const node = nodes[i];
        if (node.nodeType === 8 /* comment node */ && node.textContent.trim() === text) {
            return i;
        }
    }
    return nodes.length;
}
function extension_claim_html_tag(nodes, is_svg) {
    // find html opening tag
    const start_index = extension_find_comment(nodes, 'HTML_TAG_START', 0);
    const end_index = extension_find_comment(nodes, 'HTML_TAG_END', start_index);
    if (start_index === end_index) {
        return new extension_HtmlTagHydration(undefined, is_svg);
    }
    extension_init_claim_info(nodes);
    const html_tag_nodes = nodes.splice(start_index, end_index - start_index + 1);
    extension_detach(html_tag_nodes[0]);
    extension_detach(html_tag_nodes[html_tag_nodes.length - 1]);
    const claimed_nodes = html_tag_nodes.slice(1, html_tag_nodes.length - 1);
    for (const n of claimed_nodes) {
        n.claim_order = nodes.claim_info.total_claimed;
        nodes.claim_info.total_claimed += 1;
    }
    return new extension_HtmlTagHydration(claimed_nodes, is_svg);
}
function extension_set_data(text, data) {
    data = '' + data;
    if (text.data === data)
        return;
    text.data = data;
}
function extension_set_data_contenteditable(text, data) {
    data = '' + data;
    if (text.wholeText === data)
        return;
    text.data = data;
}
function extension_set_data_maybe_contenteditable(text, data, attr_value) {
    if (~extension_contenteditable_truthy_values.indexOf(attr_value)) {
        extension_set_data_contenteditable(text, data);
    }
    else {
        extension_set_data(text, data);
    }
}
function extension_set_input_value(input, value) {
    input.value = value == null ? '' : value;
}
function extension_set_input_type(input, type) {
    try {
        input.type = type;
    }
    catch (e) {
        // do nothing
    }
}
function extension_set_style(node, key, value, important) {
    if (value == null) {
        node.style.removeProperty(key);
    }
    else {
        node.style.setProperty(key, value, important ? 'important' : '');
    }
}
function extension_select_option(select, value, mounting) {
    for (let i = 0; i < select.options.length; i += 1) {
        const option = select.options[i];
        if (option.__value === value) {
            option.selected = true;
            return;
        }
    }
    if (!mounting || value !== undefined) {
        select.selectedIndex = -1; // no option should be selected
    }
}
function extension_select_options(select, value) {
    for (let i = 0; i < select.options.length; i += 1) {
        const option = select.options[i];
        option.selected = ~value.indexOf(option.__value);
    }
}
function extension_select_value(select) {
    const selected_option = select.querySelector(':checked');
    return selected_option && selected_option.__value;
}
function extension_select_multiple_value(select) {
    return [].map.call(select.querySelectorAll(':checked'), option => option.__value);
}
// unfortunately this can't be a constant as that wouldn't be tree-shakeable
// so we cache the result instead
let extension_crossorigin;
function extension_is_crossorigin() {
    if (extension_crossorigin === undefined) {
        extension_crossorigin = false;
        try {
            if (typeof window !== 'undefined' && window.parent) {
                void window.parent.document;
            }
        }
        catch (error) {
            extension_crossorigin = true;
        }
    }
    return extension_crossorigin;
}
function extension_add_iframe_resize_listener(node, fn) {
    const computed_style = getComputedStyle(node);
    if (computed_style.position === 'static') {
        node.style.position = 'relative';
    }
    const iframe = extension_internal_element('iframe');
    iframe.setAttribute('style', 'display: block; position: absolute; top: 0; left: 0; width: 100%; height: 100%; ' +
        'overflow: hidden; border: 0; opacity: 0; pointer-events: none; z-index: -1;');
    iframe.setAttribute('aria-hidden', 'true');
    iframe.tabIndex = -1;
    const crossorigin = extension_is_crossorigin();
    let unsubscribe;
    if (crossorigin) {
        iframe.src = "data:text/html,<script>onresize=function(){parent.postMessage(0,'*')}</script>";
        unsubscribe = extension_listen(window, 'message', (event) => {
            if (event.source === iframe.contentWindow)
                fn();
        });
    }
    else {
        iframe.src = 'about:blank';
        iframe.onload = () => {
            unsubscribe = extension_listen(iframe.contentWindow, 'resize', fn);
            // make sure an initial resize event is fired _after_ the iframe is loaded (which is asynchronous)
            // see https://github.com/sveltejs/svelte/issues/4233
            fn();
        };
    }
    extension_append(node, iframe);
    return () => {
        if (crossorigin) {
            unsubscribe();
        }
        else if (unsubscribe && iframe.contentWindow) {
            unsubscribe();
        }
        extension_detach(iframe);
    };
}
const extension_resize_observer_content_box = /* @__PURE__ */ new extension_ResizeObserverSingleton({ box: 'content-box' });
const extension_resize_observer_border_box = /* @__PURE__ */ new extension_ResizeObserverSingleton({ box: 'border-box' });
const extension_resize_observer_device_pixel_content_box = /* @__PURE__ */ new extension_ResizeObserverSingleton({ box: 'device-pixel-content-box' });
function extension_toggle_class(element, name, toggle) {
    element.classList[toggle ? 'add' : 'remove'](name);
}
function extension_custom_event(type, detail, { bubbles = false, cancelable = false } = {}) {
    const e = document.createEvent('CustomEvent');
    e.initCustomEvent(type, bubbles, cancelable, detail);
    return e;
}
function extension_query_selector_all(selector, parent = document.body) {
    return Array.from(parent.querySelectorAll(selector));
}
function extension_head_selector(nodeId, head) {
    const result = [];
    let started = 0;
    for (const node of head.childNodes) {
        if (node.nodeType === 8 /* comment node */) {
            const comment = node.textContent.trim();
            if (comment === `HEAD_${nodeId}_END`) {
                started -= 1;
                result.push(node);
            }
            else if (comment === `HEAD_${nodeId}_START`) {
                started += 1;
                result.push(node);
            }
        }
        else if (started > 0) {
            result.push(node);
        }
    }
    return result;
}
class extension_HtmlTag {
    constructor(is_svg = false) {
        this.is_svg = false;
        this.is_svg = is_svg;
        this.e = this.n = null;
    }
    c(html) {
        this.h(html);
    }
    m(html, target, anchor = null) {
        if (!this.e) {
            if (this.is_svg)
                this.e = extension_svg_element(target.nodeName);
            /** #7364  target for <template> may be provided as #document-fragment(11) */
            else
                this.e = extension_internal_element((target.nodeType === 11 ? 'TEMPLATE' : target.nodeName));
            this.t = target.tagName !== 'TEMPLATE' ? target : target.content;
            this.c(html);
        }
        this.i(anchor);
    }
    h(html) {
        this.e.innerHTML = html;
        this.n = Array.from(this.e.nodeName === 'TEMPLATE' ? this.e.content.childNodes : this.e.childNodes);
    }
    i(anchor) {
        for (let i = 0; i < this.n.length; i += 1) {
            extension_insert(this.t, this.n[i], anchor);
        }
    }
    p(html) {
        this.d();
        this.h(html);
        this.i(this.a);
    }
    d() {
        this.n.forEach(extension_detach);
    }
}
class extension_HtmlTagHydration extends extension_HtmlTag {
    constructor(claimed_nodes, is_svg = false) {
        super(is_svg);
        this.e = this.n = null;
        this.l = claimed_nodes;
    }
    c(html) {
        if (this.l) {
            this.n = this.l;
        }
        else {
            super.c(html);
        }
    }
    i(anchor) {
        for (let i = 0; i < this.n.length; i += 1) {
            extension_insert_hydration(this.t, this.n[i], anchor);
        }
    }
}
function extension_attribute_to_object(attributes) {
    const result = {};
    for (const attribute of attributes) {
        result[attribute.name] = attribute.value;
    }
    return result;
}
function extension_get_custom_elements_slots(element) {
    const result = {};
    element.childNodes.forEach((node) => {
        result[node.slot || 'default'] = true;
    });
    return result;
}
function extension_construct_svelte_component(component, props) {
    return new component(props);
}

// we need to store the information for multiple documents because a Svelte application could also contain iframes
// https://github.com/sveltejs/svelte/issues/3624
const extension_managed_styles = new Map();
let extension_active = 0;
// https://github.com/darkskyapp/string-hash/blob/master/index.js
function extension_hash(str) {
    let hash = 5381;
    let i = str.length;
    while (i--)
        hash = ((hash << 5) - hash) ^ str.charCodeAt(i);
    return hash >>> 0;
}
function extension_create_style_information(doc, node) {
    const info = { stylesheet: extension_append_empty_stylesheet(node), rules: {} };
    extension_managed_styles.set(doc, info);
    return info;
}
function extension_create_rule(node, a, b, duration, delay, ease, fn, uid = 0) {
    const step = 16.666 / duration;
    let keyframes = '{\n';
    for (let p = 0; p <= 1; p += step) {
        const t = a + (b - a) * ease(p);
        keyframes += p * 100 + `%{${fn(t, 1 - t)}}\n`;
    }
    const rule = keyframes + `100% {${fn(b, 1 - b)}}\n}`;
    const name = `__svelte_${extension_hash(rule)}_${uid}`;
    const doc = extension_get_root_for_style(node);
    const { stylesheet, rules } = extension_managed_styles.get(doc) || extension_create_style_information(doc, node);
    if (!rules[name]) {
        rules[name] = true;
        stylesheet.insertRule(`@keyframes ${name} ${rule}`, stylesheet.cssRules.length);
    }
    const animation = node.style.animation || '';
    node.style.animation = `${animation ? `${animation}, ` : ''}${name} ${duration}ms linear ${delay}ms 1 both`;
    extension_active += 1;
    return name;
}
function extension_delete_rule(node, name) {
    const previous = (node.style.animation || '').split(', ');
    const next = previous.filter(name
        ? anim => anim.indexOf(name) < 0 // remove specific animation
        : anim => anim.indexOf('__svelte') === -1 // remove all Svelte animations
    );
    const deleted = previous.length - next.length;
    if (deleted) {
        node.style.animation = next.join(', ');
        extension_active -= deleted;
        if (!extension_active)
            extension_clear_rules();
    }
}
function extension_clear_rules() {
    extension_raf(() => {
        if (extension_active)
            return;
        extension_managed_styles.forEach(info => {
            const { ownerNode } = info.stylesheet;
            // there is no ownerNode if it runs on jsdom.
            if (ownerNode)
                extension_detach(ownerNode);
        });
        extension_managed_styles.clear();
    });
}

function extension_create_animation(node, from, fn, params) {
    if (!from)
        return extension_noop;
    const to = node.getBoundingClientRect();
    if (from.left === to.left && from.right === to.right && from.top === to.top && from.bottom === to.bottom)
        return extension_noop;
    const { delay = 0, duration = 300, easing = extension_internal_identity, 
    // @ts-ignore todo: should this be separated from destructuring? Or start/end added to public api and documentation?
    start: start_time = extension_now() + delay, 
    // @ts-ignore todo:
    end = start_time + duration, tick = extension_noop, css } = fn(node, { from, to }, params);
    let running = true;
    let started = false;
    let name;
    function start() {
        if (css) {
            name = extension_create_rule(node, 0, 1, duration, delay, easing, css);
        }
        if (!delay) {
            started = true;
        }
    }
    function stop() {
        if (css)
            extension_delete_rule(node, name);
        running = false;
    }
    extension_loop(now => {
        if (!started && now >= start_time) {
            started = true;
        }
        if (started && now >= end) {
            tick(1, 0);
            stop();
        }
        if (!running) {
            return false;
        }
        if (started) {
            const p = now - start_time;
            const t = 0 + 1 * easing(p / duration);
            tick(t, 1 - t);
        }
        return true;
    });
    start();
    tick(0, 1);
    return stop;
}
function extension_fix_position(node) {
    const style = getComputedStyle(node);
    if (style.position !== 'absolute' && style.position !== 'fixed') {
        const { width, height } = style;
        const a = node.getBoundingClientRect();
        node.style.position = 'absolute';
        node.style.width = width;
        node.style.height = height;
        extension_add_transform(node, a);
    }
}
function extension_add_transform(node, a) {
    const b = node.getBoundingClientRect();
    if (a.left !== b.left || a.top !== b.top) {
        const style = getComputedStyle(node);
        const transform = style.transform === 'none' ? '' : style.transform;
        node.style.transform = `${transform} translate(${a.left - b.left}px, ${a.top - b.top}px)`;
    }
}

let extension_current_component;
function extension_set_current_component(component) {
    extension_current_component = component;
}
function extension_get_current_component() {
    if (!extension_current_component)
        throw new Error('Function called outside component initialization');
    return extension_current_component;
}
/**
 * Schedules a callback to run immediately before the component is updated after any state change.
 *
 * The first time the callback runs will be before the initial `onMount`
 *
 * https://svelte.dev/docs#run-time-svelte-beforeupdate
 */
function extension_beforeUpdate(fn) {
    extension_get_current_component().$$.before_update.push(fn);
}
/**
 * The `onMount` function schedules a callback to run as soon as the component has been mounted to the DOM.
 * It must be called during the component's initialisation (but doesn't need to live *inside* the component;
 * it can be called from an external module).
 *
 * `onMount` does not run inside a [server-side component](/docs#run-time-server-side-component-api).
 *
 * https://svelte.dev/docs#run-time-svelte-onmount
 */
function extension_onMount(fn) {
    extension_get_current_component().$$.on_mount.push(fn);
}
/**
 * Schedules a callback to run immediately after the component has been updated.
 *
 * The first time the callback runs will be after the initial `onMount`
 */
function extension_afterUpdate(fn) {
    extension_get_current_component().$$.after_update.push(fn);
}
/**
 * Schedules a callback to run immediately before the component is unmounted.
 *
 * Out of `onMount`, `beforeUpdate`, `afterUpdate` and `onDestroy`, this is the
 * only one that runs inside a server-side component.
 *
 * https://svelte.dev/docs#run-time-svelte-ondestroy
 */
function extension_onDestroy(fn) {
    extension_get_current_component().$$.on_destroy.push(fn);
}
/**
 * Creates an event dispatcher that can be used to dispatch [component events](/docs#template-syntax-component-directives-on-eventname).
 * Event dispatchers are functions that can take two arguments: `name` and `detail`.
 *
 * Component events created with `createEventDispatcher` create a
 * [CustomEvent](https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent).
 * These events do not [bubble](https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Building_blocks/Events#Event_bubbling_and_capture).
 * The `detail` argument corresponds to the [CustomEvent.detail](https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent/detail)
 * property and can contain any type of data.
 *
 * https://svelte.dev/docs#run-time-svelte-createeventdispatcher
 */
function extension_createEventDispatcher() {
    const component = extension_get_current_component();
    return (type, detail, { cancelable = false } = {}) => {
        const callbacks = component.$$.callbacks[type];
        if (callbacks) {
            // TODO are there situations where events could be dispatched
            // in a server (non-DOM) environment?
            const event = extension_custom_event(type, detail, { cancelable });
            callbacks.slice().forEach(fn => {
                fn.call(component, event);
            });
            return !event.defaultPrevented;
        }
        return true;
    };
}
/**
 * Associates an arbitrary `context` object with the current component and the specified `key`
 * and returns that object. The context is then available to children of the component
 * (including slotted content) with `getContext`.
 *
 * Like lifecycle functions, this must be called during component initialisation.
 *
 * https://svelte.dev/docs#run-time-svelte-setcontext
 */
function extension_setContext(key, context) {
    extension_get_current_component().$$.context.set(key, context);
    return context;
}
/**
 * Retrieves the context that belongs to the closest parent component with the specified `key`.
 * Must be called during component initialisation.
 *
 * https://svelte.dev/docs#run-time-svelte-getcontext
 */
function extension_getContext(key) {
    return extension_get_current_component().$$.context.get(key);
}
/**
 * Retrieves the whole context map that belongs to the closest parent component.
 * Must be called during component initialisation. Useful, for example, if you
 * programmatically create a component and want to pass the existing context to it.
 *
 * https://svelte.dev/docs#run-time-svelte-getallcontexts
 */
function extension_getAllContexts() {
    return extension_get_current_component().$$.context;
}
/**
 * Checks whether a given `key` has been set in the context of a parent component.
 * Must be called during component initialisation.
 *
 * https://svelte.dev/docs#run-time-svelte-hascontext
 */
function extension_hasContext(key) {
    return extension_get_current_component().$$.context.has(key);
}
// TODO figure out if we still want to support
// shorthand events, or if we want to implement
// a real bubbling mechanism
function extension_bubble(component, event) {
    const callbacks = component.$$.callbacks[event.type];
    if (callbacks) {
        // @ts-ignore
        callbacks.slice().forEach(fn => fn.call(this, event));
    }
}

const extension_dirty_components = [];
const extension_intros = { enabled: false };
const extension_binding_callbacks = [];
let extension_render_callbacks = [];
const extension_flush_callbacks = [];
const extension_resolved_promise = /* @__PURE__ */ Promise.resolve();
let extension_update_scheduled = false;
function extension_schedule_update() {
    if (!extension_update_scheduled) {
        extension_update_scheduled = true;
        extension_resolved_promise.then(extension_flush);
    }
}
function extension_tick() {
    extension_schedule_update();
    return extension_resolved_promise;
}
function extension_add_render_callback(fn) {
    extension_render_callbacks.push(fn);
}
function extension_add_flush_callback(fn) {
    extension_flush_callbacks.push(fn);
}
// flush() calls callbacks in this order:
// 1. All beforeUpdate callbacks, in order: parents before children
// 2. All bind:this callbacks, in reverse order: children before parents.
// 3. All afterUpdate callbacks, in order: parents before children. EXCEPT
//    for afterUpdates called during the initial onMount, which are called in
//    reverse order: children before parents.
// Since callbacks might update component values, which could trigger another
// call to flush(), the following steps guard against this:
// 1. During beforeUpdate, any updated components will be added to the
//    dirty_components array and will cause a reentrant call to flush(). Because
//    the flush index is kept outside the function, the reentrant call will pick
//    up where the earlier call left off and go through all dirty components. The
//    current_component value is saved and restored so that the reentrant call will
//    not interfere with the "parent" flush() call.
// 2. bind:this callbacks cannot trigger new flush() calls.
// 3. During afterUpdate, any updated components will NOT have their afterUpdate
//    callback called a second time; the seen_callbacks set, outside the flush()
//    function, guarantees this behavior.
const extension_seen_callbacks = new Set();
let extension_flushidx = 0; // Do *not* move this inside the flush() function
function extension_flush() {
    // Do not reenter flush while dirty components are updated, as this can
    // result in an infinite loop. Instead, let the inner flush handle it.
    // Reentrancy is ok afterwards for bindings etc.
    if (extension_flushidx !== 0) {
        return;
    }
    const saved_component = extension_current_component;
    do {
        // first, call beforeUpdate functions
        // and update components
        try {
            while (extension_flushidx < extension_dirty_components.length) {
                const component = extension_dirty_components[extension_flushidx];
                extension_flushidx++;
                extension_set_current_component(component);
                extension_update(component.$$);
            }
        }
        catch (e) {
            // reset dirty state to not end up in a deadlocked state and then rethrow
            extension_dirty_components.length = 0;
            extension_flushidx = 0;
            throw e;
        }
        extension_set_current_component(null);
        extension_dirty_components.length = 0;
        extension_flushidx = 0;
        while (extension_binding_callbacks.length)
            extension_binding_callbacks.pop()();
        // then, once components are updated, call
        // afterUpdate functions. This may cause
        // subsequent updates...
        for (let i = 0; i < extension_render_callbacks.length; i += 1) {
            const callback = extension_render_callbacks[i];
            if (!extension_seen_callbacks.has(callback)) {
                // ...so guard against infinite loops
                extension_seen_callbacks.add(callback);
                callback();
            }
        }
        extension_render_callbacks.length = 0;
    } while (extension_dirty_components.length);
    while (extension_flush_callbacks.length) {
        extension_flush_callbacks.pop()();
    }
    extension_update_scheduled = false;
    extension_seen_callbacks.clear();
    extension_set_current_component(saved_component);
}
function extension_update($$) {
    if ($$.fragment !== null) {
        $$.update();
        extension_run_all($$.before_update);
        const dirty = $$.dirty;
        $$.dirty = [-1];
        $$.fragment && $$.fragment.p($$.ctx, dirty);
        $$.after_update.forEach(extension_add_render_callback);
    }
}
/**
 * Useful for example to execute remaining `afterUpdate` callbacks before executing `destroy`.
 */
function extension_flush_render_callbacks(fns) {
    const filtered = [];
    const targets = [];
    extension_render_callbacks.forEach((c) => fns.indexOf(c) === -1 ? filtered.push(c) : targets.push(c));
    targets.forEach((c) => c());
    extension_render_callbacks = filtered;
}

let extension_promise;
function extension_wait() {
    if (!extension_promise) {
        extension_promise = Promise.resolve();
        extension_promise.then(() => {
            extension_promise = null;
        });
    }
    return extension_promise;
}
function extension_dispatch(node, direction, kind) {
    node.dispatchEvent(extension_custom_event(`${direction ? 'intro' : 'outro'}${kind}`));
}
const extension_outroing = new Set();
let extension_outros;
function extension_group_outros() {
    extension_outros = {
        r: 0,
        c: [],
        p: extension_outros // parent group
    };
}
function extension_check_outros() {
    if (!extension_outros.r) {
        extension_run_all(extension_outros.c);
    }
    extension_outros = extension_outros.p;
}
function extension_transition_in(block, local) {
    if (block && block.i) {
        extension_outroing.delete(block);
        block.i(local);
    }
}
function extension_transition_out(block, local, detach, callback) {
    if (block && block.o) {
        if (extension_outroing.has(block))
            return;
        extension_outroing.add(block);
        extension_outros.c.push(() => {
            extension_outroing.delete(block);
            if (callback) {
                if (detach)
                    block.d(1);
                callback();
            }
        });
        block.o(local);
    }
    else if (callback) {
        callback();
    }
}
const extension_null_transition = { duration: 0 };
function extension_create_in_transition(node, fn, params) {
    const options = { direction: 'in' };
    let config = fn(node, params, options);
    let running = false;
    let animation_name;
    let task;
    let uid = 0;
    function cleanup() {
        if (animation_name)
            extension_delete_rule(node, animation_name);
    }
    function go() {
        const { delay = 0, duration = 300, easing = extension_internal_identity, tick = extension_noop, css } = config || extension_null_transition;
        if (css)
            animation_name = extension_create_rule(node, 0, 1, duration, delay, easing, css, uid++);
        tick(0, 1);
        const start_time = extension_now() + delay;
        const end_time = start_time + duration;
        if (task)
            task.abort();
        running = true;
        extension_add_render_callback(() => extension_dispatch(node, true, 'start'));
        task = extension_loop(now => {
            if (running) {
                if (now >= end_time) {
                    tick(1, 0);
                    extension_dispatch(node, true, 'end');
                    cleanup();
                    return running = false;
                }
                if (now >= start_time) {
                    const t = easing((now - start_time) / duration);
                    tick(t, 1 - t);
                }
            }
            return running;
        });
    }
    let started = false;
    return {
        start() {
            if (started)
                return;
            started = true;
            extension_delete_rule(node);
            if (extension_internal_is_function(config)) {
                config = config(options);
                extension_wait().then(go);
            }
            else {
                go();
            }
        },
        invalidate() {
            started = false;
        },
        end() {
            if (running) {
                cleanup();
                running = false;
            }
        }
    };
}
function extension_create_out_transition(node, fn, params) {
    const options = { direction: 'out' };
    let config = fn(node, params, options);
    let running = true;
    let animation_name;
    const group = extension_outros;
    group.r += 1;
    function go() {
        const { delay = 0, duration = 300, easing = extension_internal_identity, tick = extension_noop, css } = config || extension_null_transition;
        if (css)
            animation_name = extension_create_rule(node, 1, 0, duration, delay, easing, css);
        const start_time = extension_now() + delay;
        const end_time = start_time + duration;
        extension_add_render_callback(() => extension_dispatch(node, false, 'start'));
        extension_loop(now => {
            if (running) {
                if (now >= end_time) {
                    tick(0, 1);
                    extension_dispatch(node, false, 'end');
                    if (!--group.r) {
                        // this will result in `end()` being called,
                        // so we don't need to clean up here
                        extension_run_all(group.c);
                    }
                    return false;
                }
                if (now >= start_time) {
                    const t = easing((now - start_time) / duration);
                    tick(1 - t, t);
                }
            }
            return running;
        });
    }
    if (extension_internal_is_function(config)) {
        extension_wait().then(() => {
            // @ts-ignore
            config = config(options);
            go();
        });
    }
    else {
        go();
    }
    return {
        end(reset) {
            if (reset && config.tick) {
                config.tick(1, 0);
            }
            if (running) {
                if (animation_name)
                    extension_delete_rule(node, animation_name);
                running = false;
            }
        }
    };
}
function extension_create_bidirectional_transition(node, fn, params, intro) {
    const options = { direction: 'both' };
    let config = fn(node, params, options);
    let t = intro ? 0 : 1;
    let running_program = null;
    let pending_program = null;
    let animation_name = null;
    function clear_animation() {
        if (animation_name)
            extension_delete_rule(node, animation_name);
    }
    function init(program, duration) {
        const d = (program.b - t);
        duration *= Math.abs(d);
        return {
            a: t,
            b: program.b,
            d,
            duration,
            start: program.start,
            end: program.start + duration,
            group: program.group
        };
    }
    function go(b) {
        const { delay = 0, duration = 300, easing = extension_internal_identity, tick = extension_noop, css } = config || extension_null_transition;
        const program = {
            start: extension_now() + delay,
            b
        };
        if (!b) {
            // @ts-ignore todo: improve typings
            program.group = extension_outros;
            extension_outros.r += 1;
        }
        if (running_program || pending_program) {
            pending_program = program;
        }
        else {
            // if this is an intro, and there's a delay, we need to do
            // an initial tick and/or apply CSS animation immediately
            if (css) {
                clear_animation();
                animation_name = extension_create_rule(node, t, b, duration, delay, easing, css);
            }
            if (b)
                tick(0, 1);
            running_program = init(program, duration);
            extension_add_render_callback(() => extension_dispatch(node, b, 'start'));
            extension_loop(now => {
                if (pending_program && now > pending_program.start) {
                    running_program = init(pending_program, duration);
                    pending_program = null;
                    extension_dispatch(node, running_program.b, 'start');
                    if (css) {
                        clear_animation();
                        animation_name = extension_create_rule(node, t, running_program.b, running_program.duration, 0, easing, config.css);
                    }
                }
                if (running_program) {
                    if (now >= running_program.end) {
                        tick(t = running_program.b, 1 - t);
                        extension_dispatch(node, running_program.b, 'end');
                        if (!pending_program) {
                            // we're done
                            if (running_program.b) {
                                // intro — we can tidy up immediately
                                clear_animation();
                            }
                            else {
                                // outro — needs to be coordinated
                                if (!--running_program.group.r)
                                    extension_run_all(running_program.group.c);
                            }
                        }
                        running_program = null;
                    }
                    else if (now >= running_program.start) {
                        const p = now - running_program.start;
                        t = running_program.a + running_program.d * easing(p / running_program.duration);
                        tick(t, 1 - t);
                    }
                }
                return !!(running_program || pending_program);
            });
        }
    }
    return {
        run(b) {
            if (extension_internal_is_function(config)) {
                extension_wait().then(() => {
                    // @ts-ignore
                    config = config(options);
                    go(b);
                });
            }
            else {
                go(b);
            }
        },
        end() {
            clear_animation();
            running_program = pending_program = null;
        }
    };
}

function extension_handle_promise(promise, info) {
    const token = info.token = {};
    function update(type, index, key, value) {
        if (info.token !== token)
            return;
        info.resolved = value;
        let child_ctx = info.ctx;
        if (key !== undefined) {
            child_ctx = child_ctx.slice();
            child_ctx[key] = value;
        }
        const block = type && (info.current = type)(child_ctx);
        let needs_flush = false;
        if (info.block) {
            if (info.blocks) {
                info.blocks.forEach((block, i) => {
                    if (i !== index && block) {
                        extension_group_outros();
                        extension_transition_out(block, 1, 1, () => {
                            if (info.blocks[i] === block) {
                                info.blocks[i] = null;
                            }
                        });
                        extension_check_outros();
                    }
                });
            }
            else {
                info.block.d(1);
            }
            block.c();
            extension_transition_in(block, 1);
            block.m(info.mount(), info.anchor);
            needs_flush = true;
        }
        info.block = block;
        if (info.blocks)
            info.blocks[index] = block;
        if (needs_flush) {
            extension_flush();
        }
    }
    if (extension_is_promise(promise)) {
        const current_component = extension_get_current_component();
        promise.then(value => {
            extension_set_current_component(current_component);
            update(info.then, 1, info.value, value);
            extension_set_current_component(null);
        }, error => {
            extension_set_current_component(current_component);
            update(info.catch, 2, info.error, error);
            extension_set_current_component(null);
            if (!info.hasCatch) {
                throw error;
            }
        });
        // if we previously had a then/catch block, destroy it
        if (info.current !== info.pending) {
            update(info.pending, 0);
            return true;
        }
    }
    else {
        if (info.current !== info.then) {
            update(info.then, 1, info.value, promise);
            return true;
        }
        info.resolved = promise;
    }
}
function extension_update_await_block_branch(info, ctx, dirty) {
    const child_ctx = ctx.slice();
    const { resolved } = info;
    if (info.current === info.then) {
        child_ctx[info.value] = resolved;
    }
    if (info.current === info.catch) {
        child_ctx[info.error] = resolved;
    }
    info.block.p(child_ctx, dirty);
}

function extension_destroy_block(block, lookup) {
    block.d(1);
    lookup.delete(block.key);
}
function extension_outro_and_destroy_block(block, lookup) {
    extension_transition_out(block, 1, 1, () => {
        lookup.delete(block.key);
    });
}
function extension_fix_and_destroy_block(block, lookup) {
    block.f();
    extension_destroy_block(block, lookup);
}
function extension_fix_and_outro_and_destroy_block(block, lookup) {
    block.f();
    extension_outro_and_destroy_block(block, lookup);
}
function extension_update_keyed_each(old_blocks, dirty, get_key, dynamic, ctx, list, lookup, node, destroy, create_each_block, next, get_context) {
    let o = old_blocks.length;
    let n = list.length;
    let i = o;
    const old_indexes = {};
    while (i--)
        old_indexes[old_blocks[i].key] = i;
    const new_blocks = [];
    const new_lookup = new Map();
    const deltas = new Map();
    const updates = [];
    i = n;
    while (i--) {
        const child_ctx = get_context(ctx, list, i);
        const key = get_key(child_ctx);
        let block = lookup.get(key);
        if (!block) {
            block = create_each_block(key, child_ctx);
            block.c();
        }
        else if (dynamic) {
            // defer updates until all the DOM shuffling is done
            updates.push(() => block.p(child_ctx, dirty));
        }
        new_lookup.set(key, new_blocks[i] = block);
        if (key in old_indexes)
            deltas.set(key, Math.abs(i - old_indexes[key]));
    }
    const will_move = new Set();
    const did_move = new Set();
    function insert(block) {
        extension_transition_in(block, 1);
        block.m(node, next);
        lookup.set(block.key, block);
        next = block.first;
        n--;
    }
    while (o && n) {
        const new_block = new_blocks[n - 1];
        const old_block = old_blocks[o - 1];
        const new_key = new_block.key;
        const old_key = old_block.key;
        if (new_block === old_block) {
            // do nothing
            next = new_block.first;
            o--;
            n--;
        }
        else if (!new_lookup.has(old_key)) {
            // remove old block
            destroy(old_block, lookup);
            o--;
        }
        else if (!lookup.has(new_key) || will_move.has(new_key)) {
            insert(new_block);
        }
        else if (did_move.has(old_key)) {
            o--;
        }
        else if (deltas.get(new_key) > deltas.get(old_key)) {
            did_move.add(new_key);
            insert(new_block);
        }
        else {
            will_move.add(old_key);
            o--;
        }
    }
    while (o--) {
        const old_block = old_blocks[o];
        if (!new_lookup.has(old_block.key))
            destroy(old_block, lookup);
    }
    while (n)
        insert(new_blocks[n - 1]);
    extension_run_all(updates);
    return new_blocks;
}
function extension_validate_each_keys(ctx, list, get_context, get_key) {
    const keys = new Set();
    for (let i = 0; i < list.length; i++) {
        const key = get_key(get_context(ctx, list, i));
        if (keys.has(key)) {
            throw new Error('Cannot have duplicate keys in a keyed each');
        }
        keys.add(key);
    }
}

function extension_get_spread_update(levels, updates) {
    const update = {};
    const to_null_out = {};
    const accounted_for = { $$scope: 1 };
    let i = levels.length;
    while (i--) {
        const o = levels[i];
        const n = updates[i];
        if (n) {
            for (const key in o) {
                if (!(key in n))
                    to_null_out[key] = 1;
            }
            for (const key in n) {
                if (!accounted_for[key]) {
                    update[key] = n[key];
                    accounted_for[key] = 1;
                }
            }
            levels[i] = n;
        }
        else {
            for (const key in o) {
                accounted_for[key] = 1;
            }
        }
    }
    for (const key in to_null_out) {
        if (!(key in update))
            update[key] = undefined;
    }
    return update;
}
function extension_get_spread_object(spread_props) {
    return typeof spread_props === 'object' && spread_props !== null ? spread_props : {};
}

const extension_boolean_attributes = [
    'allowfullscreen',
    'allowpaymentrequest',
    'async',
    'autofocus',
    'autoplay',
    'checked',
    'controls',
    'default',
    'defer',
    'disabled',
    'formnovalidate',
    'hidden',
    'inert',
    'ismap',
    'loop',
    'multiple',
    'muted',
    'nomodule',
    'novalidate',
    'open',
    'playsinline',
    'readonly',
    'required',
    'reversed',
    'selected'
];
/**
 * List of HTML boolean attributes (e.g. `<input disabled>`).
 * Source: https://html.spec.whatwg.org/multipage/indices.html
 */
const src_extension_boolean_attributes = new Set([...extension_boolean_attributes]);

/** regex of all html void element names */
const extension_void_element_names = /^(?:area|base|br|col|command|embed|hr|img|input|keygen|link|meta|param|source|track|wbr)$/;
function extension_is_void(name) {
    return extension_void_element_names.test(name) || name.toLowerCase() === '!doctype';
}

const extension_invalid_attribute_name_character = /[\s'">/=\u{FDD0}-\u{FDEF}\u{FFFE}\u{FFFF}\u{1FFFE}\u{1FFFF}\u{2FFFE}\u{2FFFF}\u{3FFFE}\u{3FFFF}\u{4FFFE}\u{4FFFF}\u{5FFFE}\u{5FFFF}\u{6FFFE}\u{6FFFF}\u{7FFFE}\u{7FFFF}\u{8FFFE}\u{8FFFF}\u{9FFFE}\u{9FFFF}\u{AFFFE}\u{AFFFF}\u{BFFFE}\u{BFFFF}\u{CFFFE}\u{CFFFF}\u{DFFFE}\u{DFFFF}\u{EFFFE}\u{EFFFF}\u{FFFFE}\u{FFFFF}\u{10FFFE}\u{10FFFF}]/u;
// https://html.spec.whatwg.org/multipage/syntax.html#attributes-2
// https://infra.spec.whatwg.org/#noncharacter
function extension_spread(args, attrs_to_add) {
    const attributes = Object.assign({}, ...args);
    if (attrs_to_add) {
        const classes_to_add = attrs_to_add.classes;
        const styles_to_add = attrs_to_add.styles;
        if (classes_to_add) {
            if (attributes.class == null) {
                attributes.class = classes_to_add;
            }
            else {
                attributes.class += ' ' + classes_to_add;
            }
        }
        if (styles_to_add) {
            if (attributes.style == null) {
                attributes.style = extension_style_object_to_string(styles_to_add);
            }
            else {
                attributes.style = extension_style_object_to_string(extension_merge_ssr_styles(attributes.style, styles_to_add));
            }
        }
    }
    let str = '';
    Object.keys(attributes).forEach(name => {
        if (extension_invalid_attribute_name_character.test(name))
            return;
        const value = attributes[name];
        if (value === true)
            str += ' ' + name;
        else if (src_extension_boolean_attributes.has(name.toLowerCase())) {
            if (value)
                str += ' ' + name;
        }
        else if (value != null) {
            str += ` ${name}="${value}"`;
        }
    });
    return str;
}
function extension_merge_ssr_styles(style_attribute, style_directive) {
    const style_object = {};
    for (const individual_style of style_attribute.split(';')) {
        const colon_index = individual_style.indexOf(':');
        const name = individual_style.slice(0, colon_index).trim();
        const value = individual_style.slice(colon_index + 1).trim();
        if (!name)
            continue;
        style_object[name] = value;
    }
    for (const name in style_directive) {
        const value = style_directive[name];
        if (value) {
            style_object[name] = value;
        }
        else {
            delete style_object[name];
        }
    }
    return style_object;
}
const extension_ATTR_REGEX = /[&"]/g;
const extension_CONTENT_REGEX = /[&<]/g;
/**
 * Note: this method is performance sensitive and has been optimized
 * https://github.com/sveltejs/svelte/pull/5701
 */
function extension_internal_escape(value, is_attr = false) {
    const str = String(value);
    const pattern = is_attr ? extension_ATTR_REGEX : extension_CONTENT_REGEX;
    pattern.lastIndex = 0;
    let escaped = '';
    let last = 0;
    while (pattern.test(str)) {
        const i = pattern.lastIndex - 1;
        const ch = str[i];
        escaped += str.substring(last, i) + (ch === '&' ? '&amp;' : (ch === '"' ? '&quot;' : '&lt;'));
        last = i + 1;
    }
    return escaped + str.substring(last);
}
function extension_escape_attribute_value(value) {
    // keep booleans, null, and undefined for the sake of `spread`
    const should_escape = typeof value === 'string' || (value && typeof value === 'object');
    return should_escape ? extension_internal_escape(value, true) : value;
}
function extension_escape_object(obj) {
    const result = {};
    for (const key in obj) {
        result[key] = extension_escape_attribute_value(obj[key]);
    }
    return result;
}
function extension_each(items, fn) {
    let str = '';
    for (let i = 0; i < items.length; i += 1) {
        str += fn(items[i], i);
    }
    return str;
}
const extension_missing_component = {
    $$render: () => ''
};
function extension_validate_component(component, name) {
    if (!component || !component.$$render) {
        if (name === 'svelte:component')
            name += ' this={...}';
        throw new Error(`<${name}> is not a valid SSR component. You may need to review your build config to ensure that dependencies are compiled, rather than imported as pre-compiled modules. Otherwise you may need to fix a <${name}>.`);
    }
    return component;
}
function extension_debug(file, line, column, values) {
    console.log(`{@debug} ${file ? file + ' ' : ''}(${line}:${column})`); // eslint-disable-line no-console
    console.log(values); // eslint-disable-line no-console
    return '';
}
let extension_on_destroy;
function extension_create_ssr_component(fn) {
    function $$render(result, props, bindings, slots, context) {
        const parent_component = extension_current_component;
        const $$ = {
            on_destroy: extension_on_destroy,
            context: new Map(context || (parent_component ? parent_component.$$.context : [])),
            // these will be immediately discarded
            on_mount: [],
            before_update: [],
            after_update: [],
            callbacks: extension_blank_object()
        };
        extension_set_current_component({ $$ });
        const html = fn(result, props, bindings, slots);
        extension_set_current_component(parent_component);
        return html;
    }
    return {
        render: (props = {}, { $$slots = {}, context = new Map() } = {}) => {
            extension_on_destroy = [];
            const result = { title: '', head: '', css: new Set() };
            const html = $$render(result, props, {}, $$slots, context);
            extension_run_all(extension_on_destroy);
            return {
                html,
                css: {
                    code: Array.from(result.css).map(css => css.code).join('\n'),
                    map: null // TODO
                },
                head: result.title + result.head
            };
        },
        $$render
    };
}
function extension_add_attribute(name, value, boolean) {
    if (value == null || (boolean && !value))
        return '';
    const assignment = (boolean && value === true) ? '' : `="${extension_internal_escape(value, true)}"`;
    return ` ${name}${assignment}`;
}
function extension_add_classes(classes) {
    return classes ? ` class="${classes}"` : '';
}
function extension_style_object_to_string(style_object) {
    return Object.keys(style_object)
        .filter(key => style_object[key])
        .map(key => `${key}: ${extension_escape_attribute_value(style_object[key])};`)
        .join(' ');
}
function extension_add_styles(style_object) {
    const styles = extension_style_object_to_string(style_object);
    return styles ? ` style="${styles}"` : '';
}

function extension_bind(component, name, callback) {
    const index = component.$$.props[name];
    if (index !== undefined) {
        component.$$.bound[index] = callback;
        callback(component.$$.ctx[index]);
    }
}
function extension_create_component(block) {
    block && block.c();
}
function extension_claim_component(block, parent_nodes) {
    block && block.l(parent_nodes);
}
function extension_mount_component(component, target, anchor, customElement) {
    const { fragment, after_update } = component.$$;
    fragment && fragment.m(target, anchor);
    if (!customElement) {
        // onMount happens before the initial afterUpdate
        extension_add_render_callback(() => {
            const new_on_destroy = component.$$.on_mount.map(extension_run).filter(extension_internal_is_function);
            // if the component was destroyed immediately
            // it will update the `$$.on_destroy` reference to `null`.
            // the destructured on_destroy may still reference to the old array
            if (component.$$.on_destroy) {
                component.$$.on_destroy.push(...new_on_destroy);
            }
            else {
                // Edge case - component was destroyed immediately,
                // most likely as a result of a binding initialising
                extension_run_all(new_on_destroy);
            }
            component.$$.on_mount = [];
        });
    }
    after_update.forEach(extension_add_render_callback);
}
function extension_destroy_component(component, detaching) {
    const $$ = component.$$;
    if ($$.fragment !== null) {
        extension_flush_render_callbacks($$.after_update);
        extension_run_all($$.on_destroy);
        $$.fragment && $$.fragment.d(detaching);
        // TODO null out other refs, including component.$$ (but need to
        // preserve final state?)
        $$.on_destroy = $$.fragment = null;
        $$.ctx = [];
    }
}
function extension_make_dirty(component, i) {
    if (component.$$.dirty[0] === -1) {
        extension_dirty_components.push(component);
        extension_schedule_update();
        component.$$.dirty.fill(0);
    }
    component.$$.dirty[(i / 31) | 0] |= (1 << (i % 31));
}
function extension_init(component, options, instance, create_fragment, not_equal, props, append_styles, dirty = [-1]) {
    const parent_component = extension_current_component;
    extension_set_current_component(component);
    const $$ = component.$$ = {
        fragment: null,
        ctx: [],
        // state
        props,
        update: extension_noop,
        not_equal,
        bound: extension_blank_object(),
        // lifecycle
        on_mount: [],
        on_destroy: [],
        on_disconnect: [],
        before_update: [],
        after_update: [],
        context: new Map(options.context || (parent_component ? parent_component.$$.context : [])),
        // everything else
        callbacks: extension_blank_object(),
        dirty,
        skip_bound: false,
        root: options.target || parent_component.$$.root
    };
    append_styles && append_styles($$.root);
    let ready = false;
    $$.ctx = instance
        ? instance(component, options.props || {}, (i, ret, ...rest) => {
            const value = rest.length ? rest[0] : ret;
            if ($$.ctx && not_equal($$.ctx[i], $$.ctx[i] = value)) {
                if (!$$.skip_bound && $$.bound[i])
                    $$.bound[i](value);
                if (ready)
                    extension_make_dirty(component, i);
            }
            return ret;
        })
        : [];
    $$.update();
    ready = true;
    extension_run_all($$.before_update);
    // `false` as a special case of no DOM component
    $$.fragment = create_fragment ? create_fragment($$.ctx) : false;
    if (options.target) {
        if (options.hydrate) {
            extension_start_hydrating();
            const nodes = extension_children(options.target);
            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
            $$.fragment && $$.fragment.l(nodes);
            nodes.forEach(extension_detach);
        }
        else {
            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
            $$.fragment && $$.fragment.c();
        }
        if (options.intro)
            extension_transition_in(component.$$.fragment);
        extension_mount_component(component, options.target, options.anchor, options.customElement);
        extension_end_hydrating();
        extension_flush();
    }
    extension_set_current_component(parent_component);
}
let extension_SvelteElement;
if (typeof HTMLElement === 'function') {
    extension_SvelteElement = class extends HTMLElement {
        constructor() {
            super();
            this.attachShadow({ mode: 'open' });
        }
        connectedCallback() {
            const { on_mount } = this.$$;
            this.$$.on_disconnect = on_mount.map(extension_run).filter(extension_internal_is_function);
            // @ts-ignore todo: improve typings
            for (const key in this.$$.slotted) {
                // @ts-ignore todo: improve typings
                this.appendChild(this.$$.slotted[key]);
            }
        }
        attributeChangedCallback(attr, _oldValue, newValue) {
            this[attr] = newValue;
        }
        disconnectedCallback() {
            extension_run_all(this.$$.on_disconnect);
        }
        $destroy() {
            extension_destroy_component(this, 1);
            this.$destroy = extension_noop;
        }
        $on(type, callback) {
            // TODO should this delegate to addEventListener?
            if (!extension_internal_is_function(callback)) {
                return extension_noop;
            }
            const callbacks = (this.$$.callbacks[type] || (this.$$.callbacks[type] = []));
            callbacks.push(callback);
            return () => {
                const index = callbacks.indexOf(callback);
                if (index !== -1)
                    callbacks.splice(index, 1);
            };
        }
        $set($$props) {
            if (this.$$set && !extension_is_empty($$props)) {
                this.$$.skip_bound = true;
                this.$$set($$props);
                this.$$.skip_bound = false;
            }
        }
    };
}
/**
 * Base class for Svelte components. Used when dev=false.
 */
class extension_SvelteComponent {
    $destroy() {
        extension_destroy_component(this, 1);
        this.$destroy = extension_noop;
    }
    $on(type, callback) {
        if (!extension_internal_is_function(callback)) {
            return extension_noop;
        }
        const callbacks = (this.$$.callbacks[type] || (this.$$.callbacks[type] = []));
        callbacks.push(callback);
        return () => {
            const index = callbacks.indexOf(callback);
            if (index !== -1)
                callbacks.splice(index, 1);
        };
    }
    $set($$props) {
        if (this.$$set && !extension_is_empty($$props)) {
            this.$$.skip_bound = true;
            this.$$set($$props);
            this.$$.skip_bound = false;
        }
    }
}

function extension_dispatch_dev(type, detail) {
    document.dispatchEvent(extension_custom_event(type, Object.assign({ version: '3.59.2' }, detail), { bubbles: true }));
}
function extension_append_dev(target, node) {
    extension_dispatch_dev('SvelteDOMInsert', { target, node });
    extension_append(target, node);
}
function extension_append_hydration_dev(target, node) {
    extension_dispatch_dev('SvelteDOMInsert', { target, node });
    extension_append_hydration(target, node);
}
function extension_insert_dev(target, node, anchor) {
    extension_dispatch_dev('SvelteDOMInsert', { target, node, anchor });
    extension_insert(target, node, anchor);
}
function extension_insert_hydration_dev(target, node, anchor) {
    extension_dispatch_dev('SvelteDOMInsert', { target, node, anchor });
    extension_insert_hydration(target, node, anchor);
}
function extension_detach_dev(node) {
    extension_dispatch_dev('SvelteDOMRemove', { node });
    extension_detach(node);
}
function extension_detach_between_dev(before, after) {
    while (before.nextSibling && before.nextSibling !== after) {
        extension_detach_dev(before.nextSibling);
    }
}
function extension_detach_before_dev(after) {
    while (after.previousSibling) {
        extension_detach_dev(after.previousSibling);
    }
}
function extension_detach_after_dev(before) {
    while (before.nextSibling) {
        extension_detach_dev(before.nextSibling);
    }
}
function extension_listen_dev(node, event, handler, options, has_prevent_default, has_stop_propagation, has_stop_immediate_propagation) {
    const modifiers = options === true ? ['capture'] : options ? Array.from(Object.keys(options)) : [];
    if (has_prevent_default)
        modifiers.push('preventDefault');
    if (has_stop_propagation)
        modifiers.push('stopPropagation');
    if (has_stop_immediate_propagation)
        modifiers.push('stopImmediatePropagation');
    extension_dispatch_dev('SvelteDOMAddEventListener', { node, event, handler, modifiers });
    const dispose = extension_listen(node, event, handler, options);
    return () => {
        extension_dispatch_dev('SvelteDOMRemoveEventListener', { node, event, handler, modifiers });
        dispose();
    };
}
function extension_attr_dev(node, attribute, value) {
    extension_attr(node, attribute, value);
    if (value == null)
        extension_dispatch_dev('SvelteDOMRemoveAttribute', { node, attribute });
    else
        extension_dispatch_dev('SvelteDOMSetAttribute', { node, attribute, value });
}
function extension_prop_dev(node, property, value) {
    node[property] = value;
    extension_dispatch_dev('SvelteDOMSetProperty', { node, property, value });
}
function extension_dataset_dev(node, property, value) {
    node.dataset[property] = value;
    extension_dispatch_dev('SvelteDOMSetDataset', { node, property, value });
}
function extension_set_data_dev(text, data) {
    data = '' + data;
    if (text.data === data)
        return;
    extension_dispatch_dev('SvelteDOMSetData', { node: text, data });
    text.data = data;
}
function extension_set_data_contenteditable_dev(text, data) {
    data = '' + data;
    if (text.wholeText === data)
        return;
    extension_dispatch_dev('SvelteDOMSetData', { node: text, data });
    text.data = data;
}
function extension_set_data_maybe_contenteditable_dev(text, data, attr_value) {
    if (~extension_contenteditable_truthy_values.indexOf(attr_value)) {
        extension_set_data_contenteditable_dev(text, data);
    }
    else {
        extension_set_data_dev(text, data);
    }
}
function extension_validate_each_argument(arg) {
    if (typeof arg !== 'string' && !(arg && typeof arg === 'object' && 'length' in arg)) {
        let msg = '{#each} only iterates over array-like objects.';
        if (typeof Symbol === 'function' && arg && Symbol.iterator in arg) {
            msg += ' You can use a spread to convert this iterable into an array.';
        }
        throw new Error(msg);
    }
}
function extension_validate_slots(name, slot, keys) {
    for (const slot_key of Object.keys(slot)) {
        if (!~keys.indexOf(slot_key)) {
            console.warn(`<${name}> received an unexpected slot "${slot_key}".`);
        }
    }
}
function extension_validate_dynamic_element(tag) {
    const is_string = typeof tag === 'string';
    if (tag && !is_string) {
        throw new Error('<svelte:element> expects "this" attribute to be a string.');
    }
}
function extension_validate_void_dynamic_element(tag) {
    if (tag && extension_is_void(tag)) {
        console.warn(`<svelte:element this="${tag}"> is self-closing and cannot have content.`);
    }
}
function extension_construct_svelte_component_dev(component, props) {
    const error_message = 'this={...} of <svelte:component> should specify a Svelte component.';
    try {
        const instance = new component(props);
        if (!instance.$$ || !instance.$set || !instance.$on || !instance.$destroy) {
            throw new Error(error_message);
        }
        return instance;
    }
    catch (err) {
        const { message } = err;
        if (typeof message === 'string' && message.indexOf('is not a constructor') !== -1) {
            throw new Error(error_message);
        }
        else {
            throw err;
        }
    }
}
/**
 * Base class for Svelte components with some minor dev-enhancements. Used when dev=true.
 */
class extension_SvelteComponentDev extends extension_SvelteComponent {
    constructor(options) {
        if (!options || (!options.target && !options.$$inline)) {
            throw new Error("'target' is a required option");
        }
        super();
    }
    $destroy() {
        super.$destroy();
        this.$destroy = () => {
            console.warn('Component was already destroyed'); // eslint-disable-line no-console
        };
    }
    $capture_state() { }
    $inject_state() { }
}
/**
 * Base class to create strongly typed Svelte components.
 * This only exists for typing purposes and should be used in `.d.ts` files.
 *
 * ### Example:
 *
 * You have component library on npm called `component-library`, from which
 * you export a component called `MyComponent`. For Svelte+TypeScript users,
 * you want to provide typings. Therefore you create a `index.d.ts`:
 * ```ts
 * import { SvelteComponentTyped } from "svelte";
 * export class MyComponent extends SvelteComponentTyped<{foo: string}> {}
 * ```
 * Typing this makes it possible for IDEs like VS Code with the Svelte extension
 * to provide intellisense and to use the component like this in a Svelte file
 * with TypeScript:
 * ```svelte
 * <script lang="ts">
 * 	import { MyComponent } from "component-library";
 * </script>
 * <MyComponent foo={'bar'} />
 * ```
 *
 * #### Why not make this part of `SvelteComponent(Dev)`?
 * Because
 * ```ts
 * class ASubclassOfSvelteComponent extends SvelteComponent<{foo: string}> {}
 * const component: typeof SvelteComponent = ASubclassOfSvelteComponent;
 * ```
 * will throw a type error, so we need to separate the more strictly typed class.
 */
class extension_SvelteComponentTyped extends extension_SvelteComponentDev {
    constructor(options) {
        super(options);
    }
}
function extension_loop_guard(timeout) {
    const start = Date.now();
    return () => {
        if (Date.now() - start > timeout) {
            throw new Error('Infinite loop detected');
        }
    };
}



;// ../../node_modules/arquero/src/util/is-array.js
/* harmony default export */ const extension_is_array = (Array.isArray);

;// ../../node_modules/arquero/src/util/to-array.js


/* harmony default export */ function extension_to_array(value) {
  return value != null
    ? (extension_is_array(value) ? value : [value])
    : [];
}
;// ../../node_modules/arquero/src/helpers/slice.js
/**
 * Generate a table expression that filters a table based on ordered row
 * indices from start to end (end not included), where start and end
 * represent per-group ordered row numbers in the table. The resulting
 * string can be used as the input to the filter verb.
 * @param {number} [start] Zero-based index at which to start extraction.
 *  A negative index indicates an offset from the end of the group.
 *  If start is undefined, slice starts from the index 0.
 * @param {number} [end] Zero-based index before which to end extraction.
 *  A negative index indicates an offset from the end of the group.
 *  If end is omitted, slice extracts through the end of the group.
 * @return {string} A table expression string for slicing values.
 * @example slice(1, -1)
 */
/* harmony default export */ function extension_slice(start = 0, end = Infinity) {
  return `${extension_prep(start)} < row_number() && row_number() <= ${extension_prep(end)}`;
}

function extension_prep(index) {
  return index < 0 ? `count() + ${index}` : index;
}
;// ../../node_modules/arquero/src/table/transformable.js



/**
 * Abstract base class for transforming data.
 */
class extension_Transformable {

  /**
   * Instantiate a new Transformable instance.
   * @param {Params} [params] The parameter values.
   */
  constructor(params) {
    if (params) this._params = params;
  }

  /**
   * Get or set table expression parameter values.
   * If called with no arguments, returns the current parameter values
   * as an object. Otherwise, adds the provided parameters to this
   * table's parameter set and returns the table. Any prior parameters
   * with names matching the input parameters are overridden.
   * @param {Params} [values] The parameter values.
   * @return {this|Params} The current parameters values (if called with
   *  no arguments) or this table.
   */
  params(values) {
    if (arguments.length) {
      if (values) {
        this._params = { ...this._params, ...values };
      }
      return this;
    } else {
      return this._params;
    }
  }

  /**
   * Create a new fully-materialized instance of this table.
   * All filter and orderby settings are removed from the new table.
   * Instead, the backing data itself is filtered and ordered as needed.
   * @param {number[]} [indices] Ordered row indices to materialize.
   *  If unspecified, all rows passing the table filter are used.
   * @return {this} A reified table.
   */
  reify(indices) {
    return this.__reify(this, indices);
  }

  // -- Transformation Verbs ------------------------------------------------

  /**
   * Count the number of values in a group. This method is a shorthand
   * for {@link Transformable#rollup} with a count aggregate function.
   * @param {CountOptions} [options] Options for the count.
   * @return {this} A new table with groupby and count columns.
   * @example table.groupby('colA').count()
   * @example table.groupby('colA').count({ as: 'num' })
   */
  count(options) {
    return this.__count(this, options);
  }

  /**
   * Derive new column values based on the provided expressions. By default,
   * new columns are added after (higher indices than) existing columns. Use
   * the before or after options to place new columns elsewhere.
   * @param {ExprObject} values Object of name-value pairs defining the
   *  columns to derive. The input object should have output column
   *  names for keys and table expressions for values.
   * @param {DeriveOptions} [options] Options for dropping or relocating
   *  derived columns. Use either a before or after property to indicate
   *  where to place derived columns. Specifying both before and after is an
   *  error. Unlike the relocate verb, this option affects only new columns;
   *  updated columns with existing names are excluded from relocation.
   * @return {this} A new table with derived columns added.
   * @example table.derive({ sumXY: d => d.x + d.y })
   * @example table.derive({ z: d => d.x * d.y }, { before: 'x' })
   */
  derive(values, options) {
    return this.__derive(this, values, options);
  }

  /**
   * Filter a table to a subset of rows based on the input criteria.
   * The resulting table provides a filtered view over the original data; no
   * data copy is made. To create a table that copies only filtered data to
   * new data structures, call {@link Transformable#reify} on the output table.
   * @param {TableExpr} criteria Filter criteria as a table expression.
   *  Both aggregate and window functions are permitted, taking into account
   *  {@link Transformable#groupby} or {@link Transformable#orderby} settings.
   * @return {this} A new table with filtered rows.
   * @example table.filter(d => abs(d.value) < 5)
   */
  filter(criteria) {
    return this.__filter(this, criteria);
  }

  /**
   * Extract rows with indices from start to end (end not included), where
   * start and end represent per-group ordered row numbers in the table.
   * @param {number} [start] Zero-based index at which to start extraction.
   *  A negative index indicates an offset from the end of the group.
   *  If start is undefined, slice starts from the index 0.
   * @param {number} [end] Zero-based index before which to end extraction.
   *  A negative index indicates an offset from the end of the group.
   *  If end is omitted, slice extracts through the end of the group.
   * @return {this} A new table with sliced rows.
   * @example table.slice(1, -1)
   */
  slice(start, end) {
    return this.filter(extension_slice(start, end)).reify();
  }

  /**
   * Group table rows based on a set of column values.
   * Subsequent operations that are sensitive to grouping (such as
   * aggregate functions) will operate over the grouped rows.
   * To undo grouping, use {@link Transformable#ungroup}.
   * @param  {...ExprList} keys Key column values to group by.
   *  The keys may be specified using column name strings, column index
   *  numbers, value objects with output column names for keys and table
   *  expressions for values, or selection helper functions.
   * @return {this} A new table with grouped rows.
   * @example table.groupby('colA', 'colB')
   * @example table.groupby({ key: d => d.colA + d.colB })
   */
  groupby(...keys) {
    return this.__groupby(this, keys.flat());
  }

  /**
   * Order table rows based on a set of column values.
   * Subsequent operations sensitive to ordering (such as window functions)
   * will operate over sorted values.
   * The resulting table provides an view over the original data, without
   * any copying. To create a table with sorted data copied to new data
   * strucures, call {@link Transformable#reify} on the result of this method.
   * To undo ordering, use {@link Transformable#unorder}.
   * @param  {...OrderKeys} keys Key values to sort by, in precedence order.
   *  By default, sorting is done in ascending order.
   *  To sort in descending order, wrap values using {@link desc}.
   *  If a string, order by the column with that name.
   *  If a number, order by the column with that index.
   *  If a function, must be a valid table expression; aggregate functions
   *  are permitted, but window functions are not.
   *  If an object, object values must be valid values parameters
   *  with output column names for keys and table expressions
   *  for values (the output names will be ignored).
   *  If an array, array values must be valid key parameters.
   * @return {this} A new ordered table.
   * @example table.orderby('a', desc('b'))
   * @example table.orderby({ a: 'a', b: desc('b') )})
   * @example table.orderby(desc(d => d.a))
   */
  orderby(...keys) {
    return this.__orderby(this, keys.flat());
  }

  /**
   * Relocate a subset of columns to change their positions, also
   * potentially renaming them.
   * @param {Selection} columns An ordered selection of columns to relocate.
   *  The input may consist of column name strings, column integer indices,
   *  rename objects with current column names as keys and new column names
   *  as values, or functions that take a table as input and returns a valid
   *  selection parameter (typically the output of selection helper functions
   *  such as {@link all}, {@link not}, or {@link range}).
   * @param {RelocateOptions} options Options for relocating. Must include
   *  either the before or after property to indicate where to place the
   *  relocated columns. Specifying both before and after is an error.
   * @return {this} A new table with relocated columns.
   * @example table.relocate(['colY', 'colZ'], { after: 'colX' })
   * @example table.relocate(not('colB', 'colC'), { before: 'colA' })
   * @example table.relocate({ colA: 'newA', colB: 'newB' }, { after: 'colC' })
   */
  relocate(columns, options) {
    return this.__relocate(this, extension_to_array(columns), options);
  }

  /**
   * Rename one or more columns, preserving column order.
   * @param {...Select} columns One or more rename objects with current
   *  column names as keys and new column names as values.
   * @return {this} A new table with renamed columns.
   * @example table.rename({ oldName: 'newName' })
   * @example table.rename({ a: 'a2', b: 'b2' })
   */
  rename(...columns) {
    return this.__rename(this, columns.flat());
  }

  /**
   * Rollup a table to produce an aggregate summary.
   * Often used in conjunction with {@link Transformable#groupby}.
   * To produce counts only, {@link Transformable#count} is a shortcut.
   * @param {ExprObject} [values] Object of name-value pairs defining aggregate
   *  output columns. The input object should have output column names for
   *  keys and table expressions for values. The expressions must be valid
   *  aggregate expressions: window functions are not allowed and column
   *  references must be arguments to aggregate functions.
   * @return {this} A new table of aggregate summary values.
   * @example table.groupby('colA').rollup({ mean: d => mean(d.colB) })
   * @example table.groupby('colA').rollup({ mean: op.median('colB') })
   */
  rollup(values) {
    return this.__rollup(this, values);
  }

  /**
   * Generate a table from a random sample of rows.
   * If the table is grouped, performs a stratified sample by
   * sampling from each group separately.
   * @param {number|TableExpr} size The number of samples to draw per group.
   *  If number-valued, the same sample size is used for each group.
   *  If function-valued, the input should be an aggregate table
   *  expression compatible with {@link Transformable#rollup}.
   * @param {SampleOptions} [options] Options for sampling.
   * @return {this} A new table with sampled rows.
   * @example table.sample(50)
   * @example table.sample(100, { replace: true })
   * @example table.groupby('colA').sample(() => op.floor(0.5 * op.count()))
   */
  sample(size, options) {
    return this.__sample(this, size, options);
  }

  /**
   * Select a subset of columns into a new table, potentially renaming them.
   * @param {...Select} columns An ordered selection of columns.
   *  The input may consist of column name strings, column integer indices,
   *  rename objects with current column names as keys and new column names
   *  as values, or functions that take a table as input and returns a valid
   *  selection parameter (typically the output of selection helper functions
   *  such as {@link all}, {@link not}, or {@link range}).
   * @return {this} A new table of selected columns.
   * @example table.select('colA', 'colB')
   * @example table.select(not('colB', 'colC'))
   * @example table.select({ colA: 'newA', colB: 'newB' })
   */
  select(...columns) {
    return this.__select(this, columns.flat());
  }

  /**
   * Ungroup a table, removing any grouping criteria.
   * Undoes the effects of {@link Transformable#groupby}.
   * @return {this} A new ungrouped table, or this table if not grouped.
   * @example table.ungroup()
   */
  ungroup() {
    return this.__ungroup(this);
  }

  /**
   * Unorder a table, removing any sorting criteria.
   * Undoes the effects of {@link Transformable#orderby}.
   * @return {this} A new unordered table, or this table if not ordered.
   * @example table.unorder()
   */
  unorder() {
    return this.__unorder(this);
  }

  // -- Cleaning Verbs ------------------------------------------------------

  /**
   * De-duplicate table rows by removing repeated row values.
   * @param {...ExprList} keys Key columns to check for duplicates.
   *  Two rows are considered duplicates if they have matching values for
   *  all keys. If keys are unspecified, all columns are used.
   *  The keys may be specified using column name strings, column index
   *  numbers, value objects with output column names for keys and table
   *  expressions for values, or selection helper functions.
   * @return {this} A new de-duplicated table.
   * @example table.dedupe()
   * @example table.dedupe('a', 'b')
   * @example table.dedupe({ abs: d => op.abs(d.a) })
   */
  dedupe(...keys) {
    return this.__dedupe(this, keys.flat());
  }

  /**
   * Impute missing values or rows. Accepts a set of column-expression pairs
   * and evaluates the expressions to replace any missing (null, undefined,
   * or NaN) values in the original column.
   * If the expand option is specified, imputes new rows for missing
   * combinations of values. All combinations of key values (a full cross
   * product) are considered for each level of grouping (specified by
   * {@link Transformable#groupby}). New rows will be added for any combination
   * of key and groupby values not already contained in the table. For all
   * non-key and non-group columns the new rows are populated with imputation
   * values (first argument) if specified, otherwise undefined.
   * If the expand option is specified, any filter or orderby settings are
   * removed from the output table, but groupby settings persist.
   * @param {ExprObject} values Object of name-value pairs for the column values
   *  to impute. The input object should have existing column names for keys
   *  and table expressions for values. The expressions will be evaluated to
   *  determine replacements for any missing values.
   * @param {ImputeOptions} [options] Imputation options. The expand
   *  property specifies a set of column values to consider for imputing
   *  missing rows. All combinations of expanded values are considered, and
   *  new rows are added for each combination that does not appear in the
   *  input table.
   * @return {this} A new table with imputed values and/or rows.
   * @example table.impute({ v: () => 0 })
   * @example table.impute({ v: d => op.mean(d.v) })
   * @example table.impute({ v: () => 0 }, { expand: ['x', 'y'] })
   */
  impute(values, options) {
    return this.__impute(this, values, options);
  }

  // -- Reshaping Verbs -----------------------------------------------------

  /**
   * Fold one or more columns into two key-value pair columns.
   * The fold transform is an inverse of the {@link Transformable#pivot} transform.
   * The resulting table has two new columns, one containing the column
   * names (named "key") and the other the column values (named "value").
   * The number of output rows equals the original row count multiplied
   * by the number of folded columns.
   * @param {ExprList} values The columns to fold.
   *  The columns may be specified using column name strings, column index
   *  numbers, value objects with output column names for keys and table
   *  expressions for values, or selection helper functions.
   * @param {FoldOptions} [options] Options for folding.
   * @return {this} A new folded table.
   * @example table.fold('colA')
   * @example table.fold(['colA', 'colB'])
   * @example table.fold(range(5, 8))
   */
  fold(values, options) {
    return this.__fold(this, values, options);
  }

  /**
   * Pivot columns into a cross-tabulation.
   * The pivot transform is an inverse of the {@link Transformable#fold} transform.
   * The resulting table has new columns for each unique combination
   * of the provided *keys*, populated with the provided *values*.
   * The provided *values* must be aggregates, as a single set of keys may
   * include more than one row. If string-valued, the *any* aggregate is used.
   * If only one *values* column is defined, the new pivoted columns will
   * be named using key values directly. Otherwise, input value column names
   * will be included as a component of the output column names.
   * @param {ExprList} keys Key values to map to new column names.
   *  The keys may be specified using column name strings, column index
   *  numbers, value objects with output column names for keys and table
   *  expressions for values, or selection helper functions.
   * @param {ExprList} values Output values for pivoted columns.
   *  Column references will be wrapped in an *any* aggregate.
   *  If object-valued, the input object should have output value
   *  names for keys and aggregate table expressions for values.
   * @param {PivotOptions} [options] Options for pivoting.
   * @return {this} A new pivoted table.
   * @example table.pivot('key', 'value')
   * @example table.pivot(['keyA', 'keyB'], ['valueA', 'valueB'])
   * @example table.pivot({ key: d => d.key }, { value: d => sum(d.value) })
   */
  pivot(keys, values, options) {
    return this.__pivot(this, keys, values, options);
  }

  /**
   * Spread array elements into a set of new columns.
   * Output columns are named based on the value key and array index.
   * @param {ExprList} values The column values to spread.
   *  The values may be specified using column name strings, column index
   *  numbers, value objects with output column names for keys and table
   *  expressions for values, or selection helper functions.
   * @param {SpreadOptions} [options] Options for spreading.
   * @return {this} A new table with the spread columns added.
   * @example table.spread({ a: split(d.text, '') })
   * @example table.spread('arrayCol', { limit: 100 })
   */
  spread(values, options) {
    return this.__spread(this, values, options);
  }

  /**
   * Unroll one or more array-valued columns into new rows.
   * If more than one array value is used, the number of new rows
   * is the smaller of the limit and the largest length.
   * Values for all other columns are copied over.
   * @param {ExprList} values The column values to unroll.
   *  The values may be specified using column name strings, column index
   *  numbers, value objects with output column names for keys and table
   *  expressions for values, or selection helper functions.
   * @param {UnrollOptions} [options] Options for unrolling.
   * @return {this} A new unrolled table.
   * @example table.unroll('colA', { limit: 1000 })
   */
  unroll(values, options) {
    return this.__unroll(this, values, options);
  }

  // -- Joins ---------------------------------------------------------------

  /**
   * Lookup values from a secondary table and add them as new columns.
   * A lookup occurs upon matching key values for rows in both tables.
   * If the secondary table has multiple rows with the same key, only
   * the last observed instance will be considered in the lookup.
   * Lookup is similar to {@link Transformable#join_left}, but with a simpler
   * syntax and the added constraint of allowing at most one match only.
   * @param {TableRef} other The secondary table to look up values from.
   * @param {JoinKeys} [on] Lookup keys (column name strings or table
   *  expressions) for this table and the secondary table, respectively.
   * @param {...ExprList} values The column values to add from the
   *  secondary table. Can be column name strings or objects with column
   *  names as keys and table expressions as values.
   * @return {this} A new table with lookup values added.
   * @example table.lookup(other, ['key1', 'key2'], 'value1', 'value2')
   */
  lookup(other, on, ...values) {
    return this.__lookup(this, other, on, values.flat());
  }

  /**
   * Join two tables, extending the columns of one table with
   * values from the other table. The current table is considered
   * the "left" table in the join, and the new table input is
   * considered the "right" table in the join. By default an inner
   * join is performed, removing all rows that do not match the
   * join criteria. To perform left, right, or full outer joins, use
   * the {@link Transformable#join_left}, {@link Transformable#join_right}, or
   * {@link Transformable#join_full} methods, or provide an options argument.
   * @param {TableRef} other The other (right) table to join with.
   * @param {JoinPredicate} [on] The join criteria for matching table rows.
   *  If unspecified, the values of all columns with matching names
   *  are compared.
   *  If array-valued, a two-element array should be provided, containing
   *  the columns to compare for the left and right tables, respectively.
   *  If a one-element array or a string value is provided, the same
   *  column names will be drawn from both tables.
   *  If function-valued, should be a two-table table expression that
   *  returns a boolean value. When providing a custom predicate, note that
   *  join key values can be arrays or objects, and that normal join
   *  semantics do not consider null or undefined values to be equal (that is,
   *  null !== null). Use the op.equal function to handle these cases.
   * @param {JoinValues} [values] The columns to include in the join output.
   *  If unspecified, all columns from both tables are included; paired
   *  join keys sharing the same column name are included only once.
   *  If array-valued, a two element array should be provided, containing
   *  the columns to include for the left and right tables, respectively.
   *  Array input may consist of column name strings, objects with output
   *  names as keys and single-table table expressions as values, or the
   *  selection helper functions {@link all}, {@link not}, or {@link range}.
   *  If object-valued, specifies the key-value pairs for each output,
   *  defined using two-table table expressions.
   * @param {JoinOptions} [options] Options for the join.
   * @return {this} A new joined table.
   * @example table.join(other, ['keyL', 'keyR'])
   * @example table.join(other, (a, b) => equal(a.keyL, b.keyR))
   */
  join(other, on, values, options) {
    return this.__join(this, other, on, values, options);
  }

  /**
   * Perform a left outer join on two tables. Rows in the left table
   * that do not match a row in the right table will be preserved.
   * This is a convenience method with fixed options for {@link Transformable#join}.
   * @param {TableRef} other The other (right) table to join with.
   * @param {JoinPredicate} [on] The join criteria for matching table rows.
   *  If unspecified, the values of all columns with matching names
   *  are compared.
   *  If array-valued, a two-element array should be provided, containing
   *  the columns to compare for the left and right tables, respectively.
   *  If a one-element array or a string value is provided, the same
   *  column names will be drawn from both tables.
   *  If function-valued, should be a two-table table expression that
   *  returns a boolean value. When providing a custom predicate, note that
   *  join key values can be arrays or objects, and that normal join
   *  semantics do not consider null or undefined values to be equal (that is,
   *  null !== null). Use the op.equal function to handle these cases.
   * @param {JoinValues} [values] The columns to include in the join output.
   *  If unspecified, all columns from both tables are included; paired
   *  join keys sharing the same column name are included only once.
   *  If array-valued, a two element array should be provided, containing
   *  the columns to include for the left and right tables, respectively.
   *  Array input may consist of column name strings, objects with output
   *  names as keys and single-table table expressions as values, or the
   *  selection helper functions {@link all}, {@link not}, or {@link range}.
   *  If object-valued, specifies the key-value pairs for each output,
   *  defined using two-table table expressions.
   * @param {JoinOptions} [options] Options for the join. With this method,
   *  any options will be overridden with {left: true, right: false}.
   * @return {this} A new joined table.
   * @example table.join_left(other, ['keyL', 'keyR'])
   * @example table.join_left(other, (a, b) => equal(a.keyL, b.keyR))
   */
  join_left(other, on, values, options) {
    const opt = { ...options, left: true, right: false };
    return this.__join(this, other, on, values, opt);
  }

  /**
   * Perform a right outer join on two tables. Rows in the right table
   * that do not match a row in the left table will be preserved.
   * This is a convenience method with fixed options for {@link Transformable#join}.
   * @param {TableRef} other The other (right) table to join with.
   * @param {JoinPredicate} [on] The join criteria for matching table rows.
   *  If unspecified, the values of all columns with matching names
   *  are compared.
   *  If array-valued, a two-element array should be provided, containing
   *  the columns to compare for the left and right tables, respectively.
   *  If a one-element array or a string value is provided, the same
   *  column names will be drawn from both tables.
   *  If function-valued, should be a two-table table expression that
   *  returns a boolean value. When providing a custom predicate, note that
   *  join key values can be arrays or objects, and that normal join
   *  semantics do not consider null or undefined values to be equal (that is,
   *  null !== null). Use the op.equal function to handle these cases.
   * @param {JoinValues} [values] The columns to include in the join output.
   *  If unspecified, all columns from both tables are included; paired
   *  join keys sharing the same column name are included only once.
   *  If array-valued, a two element array should be provided, containing
   *  the columns to include for the left and right tables, respectively.
   *  Array input may consist of column name strings, objects with output
   *  names as keys and single-table table expressions as values, or the
   *  selection helper functions {@link all}, {@link not}, or {@link range}.
   *  If object-valued, specifies the key-value pairs for each output,
   *  defined using two-table table expressions.
   * @param {JoinOptions} [options] Options for the join. With this method,
   *  any options will be overridden with {left: false, right: true}.
   * @return {this} A new joined table.
   * @example table.join_right(other, ['keyL', 'keyR'])
   * @example table.join_right(other, (a, b) => equal(a.keyL, b.keyR))
   */
  join_right(other, on, values, options) {
    const opt = { ...options, left: false, right: true };
    return this.__join(this, other, on, values, opt);
  }

  /**
   * Perform a full outer join on two tables. Rows in either the left or
   * right table that do not match a row in the other will be preserved.
   * This is a convenience method with fixed options for {@link Transformable#join}.
   * @param {TableRef} other The other (right) table to join with.
   * @param {JoinPredicate} [on] The join criteria for matching table rows.
   *  If unspecified, the values of all columns with matching names
   *  are compared.
   *  If array-valued, a two-element array should be provided, containing
   *  the columns to compare for the left and right tables, respectively.
   *  If a one-element array or a string value is provided, the same
   *  column names will be drawn from both tables.
   *  If function-valued, should be a two-table table expression that
   *  returns a boolean value. When providing a custom predicate, note that
   *  join key values can be arrays or objects, and that normal join
   *  semantics do not consider null or undefined values to be equal (that is,
   *  null !== null). Use the op.equal function to handle these cases.
   * @param {JoinValues} [values] The columns to include in the join output.
   *  If unspecified, all columns from both tables are included; paired
   *  join keys sharing the same column name are included only once.
   *  If array-valued, a two element array should be provided, containing
   *  the columns to include for the left and right tables, respectively.
   *  Array input may consist of column name strings, objects with output
   *  names as keys and single-table table expressions as values, or the
   *  selection helper functions {@link all}, {@link not}, or {@link range}.
   *  If object-valued, specifies the key-value pairs for each output,
   *  defined using two-table table expressions.
   * @param {JoinOptions} [options] Options for the join. With this method,
   *  any options will be overridden with {left: true, right: true}.
   * @return {this} A new joined table.
   * @example table.join_full(other, ['keyL', 'keyR'])
   * @example table.join_full(other, (a, b) => equal(a.keyL, b.keyR))
   */
  join_full(other, on, values, options) {
    const opt = { ...options, left: true, right: true };
    return this.__join(this, other, on, values, opt);
  }

  /**
   * Produce the Cartesian cross product of two tables. The output table
   * has one row for every pair of input table rows. Beware that outputs
   * may be quite large, as the number of output rows is the product of
   * the input row counts.
   * This is a convenience method for {@link Transformable#join} in which the
   * join criteria is always true.
   * @param {TableRef} other The other (right) table to join with.
   * @param {JoinValues} [values] The columns to include in the output.
   *  If unspecified, all columns from both tables are included.
   *  If array-valued, a two element array should be provided, containing
   *  the columns to include for the left and right tables, respectively.
   *  Array input may consist of column name strings, objects with output
   *  names as keys and single-table table expressions as values, or the
   *  selection helper functions {@link all}, {@link not}, or {@link range}.
   *  If object-valued, specifies the key-value pairs for each output,
   *  defined using two-table table expressions.
   * @param {JoinOptions} [options] Options for the join.
   * @return {this} A new joined table.
   * @example table.cross(other)
   * @example table.cross(other, [['leftKey', 'leftVal'], ['rightVal']])
   */
  cross(other, values, options) {
    return this.__cross(this, other, values, options);
  }

  /**
   * Perform a semi-join, filtering the left table to only rows that
   * match a row in the right table.
   * @param {TableRef} other The other (right) table to join with.
   * @param {JoinPredicate} [on] The join criteria for matching table rows.
   *  If unspecified, the values of all columns with matching names
   *  are compared.
   *  If array-valued, a two-element array should be provided, containing
   *  the columns to compare for the left and right tables, respectively.
   *  If a one-element array or a string value is provided, the same
   *  column names will be drawn from both tables.
   *  If function-valued, should be a two-table table expression that
   *  returns a boolean value. When providing a custom predicate, note that
   *  join key values can be arrays or objects, and that normal join
   *  semantics do not consider null or undefined values to be equal (that is,
   *  null !== null). Use the op.equal function to handle these cases.
   * @return {this} A new filtered table.
   * @example table.semijoin(other)
   * @example table.semijoin(other, ['keyL', 'keyR'])
   * @example table.semijoin(other, (a, b) => equal(a.keyL, b.keyR))
   */
  semijoin(other, on) {
    return this.__semijoin(this, other, on);
  }

  /**
   * Perform an anti-join, filtering the left table to only rows that
   * do *not* match a row in the right table.
   * @param {TableRef} other The other (right) table to join with.
   * @param {JoinPredicate} [on] The join criteria for matching table rows.
   *  If unspecified, the values of all columns with matching names
   *  are compared.
   *  If array-valued, a two-element array should be provided, containing
   *  the columns to compare for the left and right tables, respectively.
   *  If a one-element array or a string value is provided, the same
   *  column names will be drawn from both tables.
   *  If function-valued, should be a two-table table expression that
   *  returns a boolean value. When providing a custom predicate, note that
   *  join key values can be arrays or objects, and that normal join
   *  semantics do not consider null or undefined values to be equal (that is,
   *  null !== null). Use the op.equal function to handle these cases.
   * @return {this} A new filtered table.
   * @example table.antijoin(other)
   * @example table.antijoin(other, ['keyL', 'keyR'])
   * @example table.antijoin(other, (a, b) => equal(a.keyL, b.keyR))
   */
  antijoin(other, on) {
    return this.__antijoin(this, other, on);
  }

  // -- Set Operations ------------------------------------------------------

  /**
   * Concatenate multiple tables into a single table, preserving all rows.
   * This transformation mirrors the UNION_ALL operation in SQL.
   * Only named columns in this table are included in the output.
   * @see Transformable#union
   * @param  {...TableRef} tables A list of tables to concatenate.
   * @return {this} A new concatenated table.
   * @example table.concat(other)
   * @example table.concat(other1, other2)
   * @example table.concat([other1, other2])
   */
  concat(...tables) {
    return this.__concat(this, tables.flat());
  }

  /**
   * Union multiple tables into a single table, deduplicating all rows.
   * This transformation mirrors the UNION operation in SQL. It is
   * similar to {@link Transformable#concat} but suppresses duplicate rows with
   * values identical to another row.
   * Only named columns in this table are included in the output.
   * @see Transformable#concat
   * @param  {...TableRef} tables A list of tables to union.
   * @return {this} A new unioned table.
   * @example table.union(other)
   * @example table.union(other1, other2)
   * @example table.union([other1, other2])
   */
  union(...tables) {
    return this.__union(this, tables.flat());
  }

  /**
   * Intersect multiple tables, keeping only rows whose with identical
   * values for all columns in all tables, and deduplicates the rows.
   * This transformation is similar to a series of {@link Transformable#semijoin}
   * calls, but additionally suppresses duplicate rows.
   * @see Transformable#semijoin
   * @param  {...TableRef} tables A list of tables to intersect.
   * @return {this} A new filtered table.
   * @example table.intersect(other)
   * @example table.intersect(other1, other2)
   * @example table.intersect([other1, other2])
   */
  intersect(...tables) {
    return this.__intersect(this, tables.flat());
  }

  /**
   * Compute the set difference with multiple tables, keeping only rows in
   * this table that whose values do not occur in the other tables.
   * This transformation is similar to a series of {@link Transformable#antijoin}
   * calls, but additionally suppresses duplicate rows.
   * @see Transformable#antijoin
   * @param  {...TableRef} tables A list of tables to difference.
   * @return {this} A new filtered table.
   * @example table.except(other)
   * @example table.except(other1, other2)
   * @example table.except([other1, other2])
   */
  except(...tables) {
    return this.__except(this, tables.flat());
  }
}

// -- Parameter Types -------------------------------------------------------

/**
 * Table expression parameters.
 * @typedef {Object.<string, *>} Params
 */

/**
 * A reference to a column by string name or integer index.
 * @typedef {string|number} ColumnRef
 */

/**
 * A value that can be coerced to a string.
 * @typedef {object} Stringable
 * @property {() => string} toString String coercion method.
 */

/**
 * A table expression provided as a string or string-coercible value.
 * @typedef {string|Stringable} TableExprString
 */

/**
 * A struct object with arbitraty named properties.
 * @typedef {Object.<string, *>} Struct
 */

/**
 * A function defined over a table row.
 * @typedef {(d?: Struct, $?: Params) => any} TableExprFunc
 */

/**
 * A table expression defined over a single table.
 * @typedef {TableExprFunc|TableExprString} TableExpr
 */

/**
 * A function defined over rows from two tables.
 * @typedef {(a?: Struct, b?: Struct, $?: Params) => any} TableFunc2
 */

/**
 * A table expression defined over two tables.
 * @typedef {TableExprFunc2|TableExprString} TableExpr2
 */

/**
 * An object that maps current column names to new column names.
 * @typedef {{ [name: string]: string }} RenameMap
 */

/**
 * A selection helper function.
 * @typedef {(table: any) => string[]} SelectHelper
 */

/**
 * One or more column selections, potentially with renaming.
 * The input may consist of a column name string, column integer index, a
 * rename map object with current column names as keys and new column names
 * as values, or a select helper function that takes a table as input and
 * returns a valid selection parameter.
 * @typedef {ColumnRef|RenameMap|SelectHelper} SelectEntry
 */

/**
 * An ordered set of column selections, potentially with renaming.
 * @typedef {SelectEntry|SelectEntry[]} Select
 */

/**
 * An object of column name / table expression pairs.
 * @typedef {{ [name: string]: TableExpr }} ExprObject
 */

/**
 * An object of column name / two-table expression pairs.
 * @typedef {{ [name: string]: TableExpr2 }} Expr2Object
 */

/**
 * An ordered set of one or more column values.
 * @typedef {ColumnRef|SelectHelper|ExprObject} ListEntry
 */

/**
 * An ordered set of column values.
 * Entries may be column name strings, column index numbers, value objects
 * with output column names for keys and table expressions for values,
 * or a selection helper function.
 * @typedef {ListEntry|ListEntry[]} ExprList
 */

/**
 * A reference to a data table or transformable instance.
 * @typedef {Transformable|string} TableRef
 */

/**
 * One or more orderby sort criteria.
 * If a string, order by the column with that name.
 * If a number, order by the column with that index.
 * If a function, must be a valid table expression; aggregate functions
 *  are permitted, but window functions are not.
 * If an object, object values must be valid values parameters
 *  with output column names for keys and table expressions
 *  for values. The output name keys will subsequently be ignored.
 * @typedef {ColumnRef|TableExpr|ExprObject} OrderKey
 */

/**
 * An ordered set of orderby sort criteria, in precedence order.
 * @typedef {OrderKey|OrderKey[]} OrderKeys
 */

/**
 * Column values to use as a join key.
 * @typedef {ColumnRef|TableExprFunc} JoinKey
 */

/**
 * An ordered set of join keys.
 * @typedef {JoinKey|[JoinKey[]]|[JoinKey[], JoinKey[]]} JoinKeys
 */

/**
 * A predicate specification for joining two tables.
 * @typedef {JoinKeys|TableExprFunc2|null} JoinPredicate
 */

/**
 * An array of per-table join values to extract.
 * @typedef {[ExprList]|[ExprList, ExprList]|[ExprList, ExprList, Expr2Object]} JoinList
 */

/**
 * A specification of join values to extract.
 * @typedef {JoinList|Expr2Object} JoinValues
 */

// -- Transform Options -----------------------------------------------------

/**
 * Options for count transformations.
 * @typedef {object} CountOptions
 * @property {string} [as='count'] The name of the output count column.
 */

/**
 * Options for derive transformations.
 * @typedef {object} DeriveOptions
 * @property {boolean} [drop=false] A flag indicating if the original
 *  columns should be dropped, leaving only the derived columns. If true,
 *  the before and after options are ignored.
 * @property {Select} [before]
 *  An anchor column that relocated columns should be placed before.
 *  The value can be any legal column selection. If multiple columns are
 *  selected, only the first column will be used as an anchor.
 *  It is an error to specify both before and after options.
 * @property {Select} [after]
 *  An anchor column that relocated columns should be placed after.
 *  The value can be any legal column selection. If multiple columns are
 *  selected, only the last column will be used as an anchor.
 *  It is an error to specify both before and after options.
 */

/**
 * Options for relocate transformations.
 * @typedef {object} RelocateOptions
 * @property {Selection} [before]
 *  An anchor column that relocated columns should be placed before.
 *  The value can be any legal column selection. If multiple columns are
 *  selected, only the first column will be used as an anchor.
 *  It is an error to specify both before and after options.
 * @property {Selection} [after]
 *  An anchor column that relocated columns should be placed after.
 *  The value can be any legal column selection. If multiple columns are
 *  selected, only the last column will be used as an anchor.
 *  It is an error to specify both before and after options.
 */

/**
 * Options for sample transformations.
 * @typedef {object} SampleOptions
 * @property {boolean} [replace=false] Flag for sampling with replacement.
 * @property {boolean} [shuffle=true] Flag to ensure randomly ordered rows.
 * @property {string|TableExprFunc} [weight] Column values to use as weights
 *  for sampling. Rows will be sampled with probability proportional to
 *  their relative weight. The input should be a column name string or
 *  a table expression compatible with {@link Transformable#derive}.
 */

/**
 * Options for impute transformations.
 * @typedef {object} ImputeOptions
 * @property {ExprList} [expand] Column values to combine to impute missing
 *  rows. For column names and indices, all unique column values are
 *  considered. Otherwise, each entry should be an object of name-expresion
 *  pairs, with valid table expressions for {@link Transformable#rollup}.
 *  All combinations of values are checked for each set of unique groupby
 *  values.
 */

/**
 * Options for fold transformations.
 * @typedef {object} FoldOptions
 * @property {string[]} [as=['key', 'value']] An array indicating the
 *  output column names to use for the key and value columns, respectively.
 */

/**
 * Options for pivot transformations.
 * @typedef {object} PivotOptions
 * @property {number} [limit=Infinity] The maximum number of new columns to generate.
 * @property {string} [keySeparator='_'] A string to place between multiple key names.
 * @property {string} [valueSeparator='_'] A string to place between key and value names.
 * @property {boolean} [sort=true] Flag for alphabetical sorting of new column names.
 */

/**
 * Options for spread transformations.
 * @typedef {object} SpreadOptions
 * @property {boolean} [drop=true] Flag indicating if input columns to the
 *  spread operation should be dropped in the output table.
 * @property {number} [limit=Infinity] The maximum number of new columns to
 *  generate.
 * @property {string[]} [as] Output column names to use. This option only
 *  applies when a single column is spread. If the given array of names is
 *  shorter than the number of generated columns and no limit option is
 *  specified, the additional generated columns will be dropped.
 */

/**
 * Options for unroll transformations.
 * @typedef {object} UnrollOptions
 * @property {number} [limit=Infinity] The maximum number of new rows
 *  to generate per array value.
 * @property {boolean|string} [index=false] Flag or column name for adding
 *  zero-based array index values as an output column. If true, a new column
 *  named "index" will be included. If string-valued, a new column with
 *  the given name will be added.
 * @property {Select} [drop] Columns to drop from the output. The input may
 *  consist of column name strings, column integer indices, objects with
 *  column names as keys, or functions that take a table as input and
 *  return a valid selection parameter (typically the output of selection
 *  helper functions such as {@link all}, {@link not}, or {@link range}).
 */

/**
 * Options for join transformations.
 * @typedef {object} JoinOptions
 * @property {boolean} [left=false] Flag indicating a left outer join.
 *  If both the *left* and *right* are true, indicates a full outer join.
 * @property {boolean} [right=false] Flag indicating a right outer join.
 *  If both the *left* and *right* are true, indicates a full outer join.
 * @property {string[]} [suffix=['_1', '_2']] Column name suffixes to
 *  append if two columns with the same name are produced by the join.
 */
;// ../../node_modules/arquero/src/util/error.js
/* harmony default export */ function extension_util_error(message) {
  throw Error(message);
}
;// ../../node_modules/arquero/src/util/is-number.js
/* harmony default export */ function extension_is_number(value) {
  return typeof value === 'number';
}
;// ../../node_modules/arquero/src/util/is-function.js
/* harmony default export */ function extension_util_is_function(value) {
  return typeof value === 'function';
}
;// ../../node_modules/arquero/src/util/repeat.js


/* harmony default export */ function extension_util_repeat(reps, value) {
  const result = Array(reps);
  if (extension_util_is_function(value)) {
    for (let i = 0; i < reps; ++i) {
      result[i] = value(i);
    }
  } else {
    result.fill(value);
  }
  return result;
}
;// ../../node_modules/arquero/src/table/table.js





/**
 * Abstract class representing a data table.
 */
class extension_Table extends extension_Transformable {

  /**
   * Instantiate a new Table instance.
   * @param {string[]} names An ordered list of column names.
   * @param {number} nrows The number of rows.
   * @param {TableData} data The backing data, which can vary by implementation.
   * @param {BitSet} [filter] A bit mask for which rows to include.
   * @param {GroupBySpec} [groups] A groupby specification for grouping ows.
   * @param {RowComparator} [order] A comparator function for sorting rows.
   * @param {Params} [params] Parameter values for table expressions.
   */
  constructor(names, nrows, data, filter, groups, order, params) {
    super(params);
    this._names = Object.freeze(names);
    this._data = data;
    this._total = nrows;
    this._nrows = filter ? filter.count() : nrows;
    this._mask = (nrows !== this._nrows && filter) || null;
    this._group = groups || null;
    this._order = order || null;
  }

  /**
   * Create a new table with the same type as this table.
   * The new table may have different data, filter, grouping, or ordering
   * based on the values of the optional configuration argument. If a
   * setting is not specified, it is inherited from the current table.
   * @param {CreateOptions} [options] Creation options for the new table.
   * @return {this} A newly created table.
   */
  create(options) { // eslint-disable-line no-unused-vars
    extension_util_error('Not implemented');
  }

  /**
   * Provide an informative object string tag.
   */
  get [Symbol.toStringTag]() {
    if (!this._names) return 'Object'; // bail if called on prototype
    const nr = this.numRows() + ' row' + (this.numRows() !== 1 ? 's' : '');
    const nc = this.numCols() + ' col' + (this.numCols() !== 1 ? 's' : '');
    return `Table: ${nc} x ${nr}`
      + (this.isFiltered() ? ` (${this.totalRows()} backing)` : '')
      + (this.isGrouped() ? `, ${this._group.size} groups` : '')
      + (this.isOrdered() ? ', ordered' : '');
  }

  /**
   * Indicates if the table has a filter applied.
   * @return {boolean} True if filtered, false otherwise.
   */
  isFiltered() {
    return !!this._mask;
  }

  /**
   * Indicates if the table has a groupby specification.
   * @return {boolean} True if grouped, false otherwise.
   */
  isGrouped() {
    return !!this._group;
  }

  /**
   * Indicates if the table has a row order comparator.
   * @return {boolean} True if ordered, false otherwise.
   */
  isOrdered() {
    return !!this._order;
  }

  /**
   * Returns the internal table storage data structure.
   * @return {TableData} The backing table storage data structure.
   */
  data() {
    return this._data;
  }

  /**
   * Returns the filter bitset mask, if defined.
   * @return {BitSet} The filter bitset mask.
   */
  mask() {
    return this._mask;
  }

  /**
   * Returns the groupby specification, if defined.
   * @return {GroupBySpec} The groupby specification.
   */
  groups() {
    return this._group;
  }

  /**
   * Returns the row order comparator function, if specified.
   * @return {RowComparator} The row order comparator function.
   */
  comparator() {
    return this._order;
  }

  /**
   * The total number of rows in this table, counting both
   * filtered and unfiltered rows.
   * @return {number} The number of total rows.
   */
  totalRows() {
    return this._total;
  }

  /**
   * The number of active rows in this table. This number may be
   * less than the total rows if the table has been filtered.
   * @see Table.totalRows
   * @return {number} The number of rows.
   */
  numRows() {
    return this._nrows;
  }

  /**
   * The number of active rows in this table. This number may be
   * less than the total rows if the table has been filtered.
   * @see Table.totalRows
   * @return {number} The number of rows.
   */
  get size() {
    return this._nrows;
  }

  /**
   * The number of columns in this table.
   * @return {number} The number of columns.
   */
  numCols() {
    return this._names.length;
  }

  /**
   * Filter function invoked for each column name.
   * @callback NameFilter
   * @param {string} name The column name.
   * @param {number} index The column index.
   * @param {string[]} array The array of names.
   * @return {boolean} Returns true to retain the column name.
   */

  /**
   * The table column names, optionally filtered.
   * @param {NameFilter} [filter] An optional filter function.
   *  If unspecified, all column names are returned.
   * @return {string[]} An array of matching column names.
   */
  columnNames(filter) {
    return filter ? this._names.filter(filter) : this._names.slice();
  }

  /**
   * The column name at the given index.
   * @param {number} index The column index.
   * @return {string} The column name,
   *  or undefined if the index is out of range.
   */
  columnName(index) {
    return this._names[index];
  }

  /**
   * The column index for the given name.
   * @param {string} name The column name.
   * @return {number} The column index, or -1 if the name is not found.
   */
  columnIndex(name) {
    return this._names.indexOf(name);
  }

  /**
   * Deprecated alias for the table array() method: use table.array()
   * instead. Get an array of values contained in a column. The resulting
   * array respects any table filter or orderby criteria.
   * @param {string} name The column name.
   * @param {ArrayConstructor|TypedArrayConstructor} [constructor=Array]
   *  The array constructor for instantiating the output array.
   * @return {DataValue[]|TypedArray} The array of column values.
   */
  columnArray(name, constructor) {
    return this.array(name, constructor);
  }

  /**
   * Get an array of values contained in a column. The resulting array
   * respects any table filter or orderby criteria.
   * @param {string} name The column name.
   * @param {ArrayConstructor|TypedArrayConstructor} [constructor=Array]
   *  The array constructor for instantiating the output array.
   * @return {DataValue[]|TypedArray} The array of column values.
   */
  array(name, constructor) { // eslint-disable-line no-unused-vars
    extension_util_error('Not implemented');
  }

  /**
   * Returns an iterator over column values.
   * @return {Iterator<object>} An iterator over row objects.
   */
  *values(name) {
    const get = this.getter(name);
    const n = this.numRows();
    for (let i = 0; i < n; ++i) {
      yield get(i);
    }
  }

  /**
   * Get the value for the given column and row.
   * @param {string} name The column name.
   * @param {number} [row=0] The row index, defaults to zero if not specified.
   * @return {DataValue} The data value at (column, row).
   */
  get(name, row = 0) { // eslint-disable-line no-unused-vars
    extension_util_error('Not implemented');
  }

  /**
   * Returns an accessor ("getter") function for a column. The returned
   * function takes a row index as its single argument and returns the
   * corresponding column value.
   * @param {string} name The column name.
   * @return {ColumnGetter} The column getter function.
   */
  getter(name) { // eslint-disable-line no-unused-vars
    extension_util_error('Not implemented');
  }

  /**
   * Returns an array of objects representing table rows.
   * @param {ObjectsOptions} [options] The options for row object generation.
   * @return {RowObject[]} An array of row objects.
   */
  objects(options) { // eslint-disable-line no-unused-vars
    extension_util_error('Not implemented');
  }

  /**
   * Returns an object representing a table row.
   * @param {number} [row=0] The row index, defaults to zero if not specified.
   * @return {object} A row object with named properties for each column.
   */
   object(row) { // eslint-disable-line no-unused-vars
    extension_util_error('Not implemented');
  }

  /**
   * Returns an iterator over objects representing table rows.
   * @return {Iterator<object>} An iterator over row objects.
   */
  [Symbol.iterator]() {
    extension_util_error('Not implemented');
  }

  /**
   * Print the contents of this table using the console.table() method.
   * @param {PrintOptions|number} options The options for row object
   *  generation, determining which rows and columns are printed. If
   *  number-valued, specifies the row limit.
   */
  print(options = {}) {
    if (extension_is_number(options)) {
      options = { limit: options };
    } else if (options.limit == null) {
      options.limit = 10;
    }

    const obj = this.objects({ ...options, grouped: false });
    const msg = `${this[Symbol.toStringTag]}. Showing ${obj.length} rows.`;

    console.log(msg);   // eslint-disable-line no-console
    console.table(obj); // eslint-disable-line no-console
  }

  /**
   * Returns an array of indices for all rows passing the table filter.
   * @param {boolean} [order=true] A flag indicating if the returned
   *  indices should be sorted if this table is ordered. If false, the
   *  returned indices may or may not be sorted.
   * @return {Uint32Array} An array of row indices.
   */
  indices(order = true) {
    if (this._index) return this._index;

    const n = this.numRows();
    const index = new Uint32Array(n);
    const ordered = this.isOrdered();
    const bits = this.mask();
    let row = -1;

    // inline the following for performance:
    // this.scan(row => index[++i] = row);
    if (bits) {
      for (let i = bits.next(0); i >= 0; i = bits.next(i + 1)) {
        index[++row] = i;
      }
    } else {
      for (let i = 0; i < n; ++i) {
        index[++row] = i;
      }
    }

    // sort index vector
    if (order && ordered) {
      const compare = this._order;
      const data = this._data;
      index.sort((a, b) => compare(a, b, data));
    }

    // save indices if they reflect table metadata
    if (order || !ordered) {
      this._index = index;
    }

    return index;
  }

  /**
   * Returns an array of indices for each group in the table.
   * If the table is not grouped, the result is the same as
   * {@link indices}, but wrapped within an array.
   * @param {boolean} [order=true] A flag indicating if the returned
   *  indices should be sorted if this table is ordered. If false, the
   *  returned indices may or may not be sorted.
   * @return {number[][]} An array of row index arrays, one per group.
   *  The indices will be filtered if the table is filtered.
   */
  partitions(order = true) {
    // return partitions if already generated
    if (this._partitions) {
      return this._partitions;
    }

    // if not grouped, return a single partition
    if (!this.isGrouped()) {
      return [ this.indices(order) ];
    }

    // generate partitions
    const { keys, size } = this._group;
    const part = extension_util_repeat(size, () => []);

    // populate partitions, don't sort if indices don't exist
    // inline the following for performance:
    // this.scan(row => part[keys[row]].push(row), sort);
    const sort = this._index;
    const bits = this.mask();
    const n = this.numRows();
    if (sort && this.isOrdered()) {
      for (let i = 0, r; i < n; ++i) {
        r = sort[i];
        part[keys[r]].push(r);
      }
    } else if (bits) {
      for (let i = bits.next(0); i >= 0; i = bits.next(i + 1)) {
        part[keys[i]].push(i);
      }
    } else {
      for (let i = 0; i < n; ++i) {
        part[keys[i]].push(i);
      }
    }

    // if ordered but not yet sorted, sort partitions directly
    if (order && !sort && this.isOrdered()) {
      const compare = this._order;
      const data = this._data;
      for (let i = 0; i < size; ++i) {
        part[i].sort((a, b) => compare(a, b, data));
      }
    }

    // save partitions if they reflect table metadata
    if (order || !this.isOrdered()) {
      this._partitions = part;
    }

    return part;
  }

  /**
   * Callback function to cancel a table scan.
   * @callback ScanStop
   * @return {void}
   */

  /**
   * Callback function invoked for each row of a table scan.
   * @callback ScanVisitor
   * @param {number} [row] The table row index.
   * @param {TableData} [data] The backing table data store.
   * @param {ScanStop} [stop] Function to stop the scan early.
   *  Callees can invoke this function to prevent future calls.
   * @return {void}
   */

  /**
   * Perform a table scan, visiting each row of the table.
   * If this table is filtered, only rows passing the filter are visited.
   * @param {ScanVisitor} fn Callback invoked for each row of the table.
   * @param {boolean} [order=false] Indicates if the table should be
   *  scanned in the order determined by {@link Table#orderby}. This
   *  argument has no effect if the table is unordered.
   * @property {number} [limit=Infinity] The maximum number of objects to create.
   * @property {number} [offset=0] The row offset indicating how many initial rows to skip.
   */
  scan(fn, order, limit = Infinity, offset = 0) {
    const filter = this._mask;
    const nrows = this._nrows;
    const data = this._data;

    let i = offset || 0;
    if (i > nrows) return;

    const n = Math.min(nrows, i + limit);
    const stop = () => i = this._total;

    if (order && this.isOrdered() || filter && this._index) {
      const index = this.indices();
      const data = this._data;
      for (; i < n; ++i) {
        fn(index[i], data, stop);
      }
    } else if (filter) {
      let c = n - i + 1;
      for (i = filter.nth(i); --c && i > -1; i = filter.next(i + 1)) {
        fn(i, data, stop);
      }
    } else {
      for (; i < n; ++i) {
        fn(i, data, stop);
      }
    }
  }

  /**
   * Extract rows with indices from start to end (end not included), where
   * start and end represent per-group ordered row numbers in the table.
   * @param {number} [start] Zero-based index at which to start extraction.
   *  A negative index indicates an offset from the end of the group.
   *  If start is undefined, slice starts from the index 0.
   * @param {number} [end] Zero-based index before which to end extraction.
   *  A negative index indicates an offset from the end of the group.
   *  If end is omitted, slice extracts through the end of the group.
   * @return {this} A new table with sliced rows.
   * @example table.slice(1, -1)
   */
  slice(start = 0, end = Infinity) {
    if (this.isGrouped()) return super.slice(start, end);

    // if not grouped, scan table directly
    const indices = [];
    const nrows = this.numRows();
    start = Math.max(0, start + (start < 0 ? nrows : 0));
    end = Math.min(nrows, Math.max(0, end + (end < 0 ? nrows : 0)));
    this.scan(row => indices.push(row), true, end - start, start);
    return this.reify(indices);
  }

  /**
   * Reduce a table, processing all rows to produce a new table.
   * To produce standard aggregate summaries, use {@link rollup}.
   * This method allows the use of custom reducer implementations,
   * for example to produce multiple rows for an aggregate.
   * @param {Reducer} reducer The reducer to apply.
   * @return {Table} A new table of reducer outputs.
   */
  reduce(reducer) {
    return this.__reduce(this, reducer);
  }
}

/**
 * A typed array constructor.
 * @typedef {Uint8ArrayConstructor|Uint16ArrayConstructor|Uint32ArrayConstructor|BigUint64ArrayConstructor|Int8ArrayConstructor|Int16ArrayConstructor|Int32ArrayConstructor|BigInt64ArrayConstructor|Float32ArrayConstructor|Float64ArrayConstructor} TypedArrayConstructor
 */

/**
 * A typed array instance.
 * @typedef {Uint8Array|Uint16Array|Uint32Array|BigUint64Array|Int8Array|Int16Array|Int32Array|BigInt64Array|Float32Array|Float64Array} TypedArray
 */

/**
 * Backing table data.
 * @typedef {object|Array} TableData
 */

/**
 * Table value.
 * @typedef {*} DataValue
 */

/**
 * Table row object.
 * @typedef {Object.<string, DataValue>} RowObject
 */

/**
 * Table expression parameters.
 * @typedef {import('./transformable').Params} Params
 */

/**
 * Proxy type for BitSet class.
 * @typedef {import('./bit-set').default} BitSet
 */

/**
 * A table groupby specification.
 * @typedef {object} GroupBySpec
 * @property {number} size The number of groups.
 * @property {string[]} names Column names for each group.
 * @property {RowExpression[]} get Value accessor functions for each group.
 * @property {number[]} rows Indices of an example table row for each group.
 * @property {number[]} keys Per-row group indices, length is total rows of table.
 */

/**
 * Column value accessor.
 * @callback ColumnGetter
 * @param {number} [row] The table row.
 * @return {DataValue}
 */

/**
 * An expression evaluated over a table row.
 * @callback RowExpression
 * @param {number} [row] The table row.
 * @param {TableData} [data] The backing table data store.
 * @return {DataValue}
 */

/**
 * Comparator function for sorting table rows.
 * @callback RowComparator
 * @param {number} rowA The table row index for the first row.
 * @param {number} rowB The table row index for the second row.
 * @param {TableData} data The backing table data store.
 * @return {number} Negative if rowA < rowB, positive if
 *  rowA > rowB, otherwise zero.
 */

/**
 * Options for derived table creation.
 * @typedef {object} CreateOptions
 * @property {TableData} [data] The backing column data.
 * @property {string[]} [names] An ordered list of column names.
 * @property {BitSet} [filter] An additional filter BitSet to apply.
 * @property {GroupBySpec} [groups] The groupby specification to use, or null for no groups.
 * @property {RowComparator} [order] The orderby comparator function to use, or null for no order.
 */

/**
 * Options for generating row objects.
 * @typedef {object} PrintOptions
 * @property {number} [limit=Infinity] The maximum number of objects to create.
 * @property {number} [offset=0] The row offset indicating how many initial rows to skip.
 * @property {import('../table/transformable').Select} [columns]
 *  An ordered set of columns to include. The input may consist of column name
 *  strings, column integer indices, objects with current column names as keys
 *  and new column names as values (for renaming), or selection helper
 *  functions such as {@link all}, {@link not}, or {@link range}.
 */

/**
 * Options for generating row objects.
 * @typedef {object} ObjectsOptions
 * @property {number} [limit=Infinity] The maximum number of objects to create.
 * @property {number} [offset=0] The row offset indicating how many initial rows to skip.
 * @property {import('../table/transformable').Select} [columns]
 *  An ordered set of columns to include. The input may consist of column name
 *  strings, column integer indices, objects with current column names as keys
 *  and new column names as values (for renaming), or selection helper
 *  functions such as {@link all}, {@link not}, or {@link range}.
 * @property {'map'|'entries'|'object'|boolean} [grouped=false]
 *  The export format for groups of rows. The default (false) is to ignore
 *  groups, returning a flat array of objects. The valid values are 'map' or
 *  true (for Map instances), 'object' (for standard objects), or 'entries'
 *  (for arrays in the style of Object.entries). For the 'object' format,
 *  groupby keys are coerced to strings to use as object property names; note
 *  that this can lead to undesirable behavior if the groupby keys are object
 *  values. The 'map' and 'entries' options preserve the groupby key values.
 */

;// ../../node_modules/arquero/src/table/column.js


/**
 * Class representing an array-backed data column.
 */
class extension_Column {
  /**
   * Create a new column instance.
   * @param {Array} data The backing array (or array-like object)
   *  containing the column data.
   */
  constructor(data) {
    this.data = data;
  }

  /**
   * Get the length (number of rows) of the column.
   * @return {number} The length of the column array.
   */
  get length() {
    return this.data.length;
  }

  /**
   * Get the column value at the given row index.
   * @param {number} row The row index of the value to retrieve.
   * @return {import('./table').DataValue} The column value.
   */
  get(row) {
    return this.data[row];
  }

  /**
   * Returns an iterator over the column values.
   * @return {Iterator<object>} An iterator over column values.
   */
  [Symbol.iterator]() {
    return this.data[Symbol.iterator]();
  }
}

/**
 * Column interface. Any object that adheres to this interface
 * can be used as a data column within a {@link ColumnTable}.
 * @typedef {object} ColumnType
 * @property {number} length
 *  The length (number of rows) of the column.
 * @property {import('./table').ColumnGetter} get
 *  Column value getter.
 */

/**
 * Column factory function interface.
 * @callback ColumnFactory
 * @param {*} data The input column data.
 * @return {ColumnType} A column instance.
 */

/**
 * Create a new column from the given input data.
 * @param {any} data The backing column data. If the value conforms to
 *  the Column interface it is returned directly. If the value is an
 *  array, it will be wrapped in a new Column instance.
 * @return {ColumnType} A compatible column instance.
 */
let extension_defaultColumnFactory = function(data) {
  return data && extension_util_is_function(data.get) ? data : new extension_Column(data);
};

/**
 * Get or set the default factory function for instantiating table columns.
 * @param {ColumnFactory} [factory] The new default factory.
 * @return {ColumnFactory} The current default column factory.
 */
function extension_columnFactory(factory) {
  return arguments.length
    ? (extension_defaultColumnFactory = factory)
    : extension_defaultColumnFactory;
}
;// ../../node_modules/arquero/src/util/is-date.js
/* harmony default export */ function extension_is_date(value) {
  return value instanceof Date;
}
;// ../../node_modules/arquero/src/util/is-object.js
/* harmony default export */ function extension_is_object(value) {
  return value === Object(value);
}
;// ../../node_modules/arquero/src/util/is-regexp.js
/* harmony default export */ function extension_is_regexp(value) {
  return value instanceof RegExp;
}
;// ../../node_modules/arquero/src/util/is-string.js
/* harmony default export */ function extension_is_string(value) {
  return typeof value === 'string';
}

;// ../../node_modules/arquero/src/table/columns-from.js








/* harmony default export */ function extension_columns_from(values, names) {
  const raise = type => extension_util_error(`Illegal argument type: ${type || typeof values}`);
  return values instanceof Map ? extension_fromKeyValuePairs(values.entries(), names)
    : extension_is_date(values) ? raise('Date')
    : extension_is_regexp(values) ? raise('RegExp')
    : extension_is_string(values) ? raise()
    : extension_is_array(values) ? extension_fromArray(values, names)
    : extension_util_is_function(values[Symbol.iterator]) ? extension_fromIterable(values, names)
    : extension_is_object(values) ? extension_fromKeyValuePairs(Object.entries(values), names)
    : raise();
}

function extension_fromKeyValuePairs(entries, names = ['key', 'value']) {
  const keys = [];
  const vals = [];

  for (const [key, val] of entries) {
    keys.push(key);
    vals.push(val);
  }

  const columns = {};
  if (names[0]) columns[names[0]] = keys;
  if (names[1]) columns[names[1]] = vals;
  return columns;
}

function extension_fromArray(values, names) {
  const len = values.length;
  const columns = {};
  const add = name => columns[name] = Array(len);

  if (len) {
    names = names || Object.keys(values[0]);
    const cols = names.map(add);
    const n = cols.length;
    for (let idx = 0; idx < len; ++idx) {
      const row = values[idx];
      for (let i = 0; i < n; ++i) {
        cols[i][idx] = row[names[i]];
      }
    }
  } else if (names) {
    names.forEach(add);
  }

  return columns;
}

function extension_fromIterable(values, names) {
  const columns = {};
  const add = name => columns[name] = [];

  let cols;
  let n;
  for (const row of values) {
    if (!cols) {
      names = names || Object.keys(row);
      cols = names.map(add);
      n = cols.length;
    }
    for (let i = 0; i < n; ++i) {
      cols[i].push(row[names[i]]);
    }
  }

  if (!cols && names) {
    names.forEach(add);
  }

  return columns;
}
;// ../../node_modules/arquero/src/util/has.js
const { hasOwnProperty: extension_has_hasOwnProperty } = Object.prototype;

/* harmony default export */ function extension_util_has(object, property) {
  return extension_has_hasOwnProperty.call(object, property);
}
;// ../../node_modules/arquero/src/table/column-set.js


/* harmony default export */ function extension_column_set(table) {
  return table
    ? new extension_ColumnSet({ ...table.data() }, table.columnNames())
    : new extension_ColumnSet();
}

class extension_ColumnSet {
  constructor(data, names) {
    this.data = data || {};
    this.names = names || [];
  }

  add(name, values) {
    if (!this.has(name)) this.names.push(name + '');
    return this.data[name] = values;
  }

  has(name) {
    return extension_util_has(this.data, name);
  }

  new() {
    this.filter = null;
    this.groups = this.groups || null;
    this.order = null;
    return this;
  }

  groupby(groups) {
    this.groups = groups;
    return this;
  }
}
;// ../../node_modules/arquero/src/util/null.js
/**
 * Default NULL (missing) value to use.
 */
/* harmony default export */ const extension_util_null = (undefined);
;// ../../node_modules/arquero/src/util/is-typed-array.js
const extension_TypedArray = Object.getPrototypeOf(Int8Array);

/* harmony default export */ function extension_is_typed_array(value) {
  return value instanceof extension_TypedArray;
}
;// ../../node_modules/arquero/src/util/is-array-type.js



function extension_is_array_type_isArrayType(value) {
  return extension_is_array(value) || extension_is_typed_array(value);
}
;// ../../node_modules/arquero/src/util/is-valid.js
/* harmony default export */ function extension_is_valid(value) {
  return value != null && value === value;
}

;// ../../node_modules/arquero/src/op/functions/array.js





const extension_isSeq = (seq) => extension_is_array_type_isArrayType(seq) || extension_is_string(seq);

/* harmony default export */ const extension_array = ({
  compact:      (arr) => extension_is_array_type_isArrayType(arr) ? arr.filter(v => extension_is_valid(v)) : arr,
  concat:       (...values) => [].concat(...values),
  includes:     (seq, value, index) => extension_isSeq(seq)
                  ? seq.includes(value, index)
                  : false,
  indexof:      (seq, value) => extension_isSeq(seq) ? seq.indexOf(value) : -1,
  join:         (arr, delim) => extension_is_array_type_isArrayType(arr) ? arr.join(delim) : extension_util_null,
  lastindexof:  (seq, value) => extension_isSeq(seq) ? seq.lastIndexOf(value) : -1,
  length:       (seq) => extension_isSeq(seq) ? seq.length : 0,
  pluck:        (arr, prop) => extension_is_array_type_isArrayType(arr)
                  ? arr.map(v => extension_is_valid(v) ? v[prop] : extension_util_null)
                  : extension_util_null,
  reverse:      (seq) => extension_is_array_type_isArrayType(seq) ? seq.slice().reverse()
                  : extension_is_string(seq) ? seq.split('').reverse().join('')
                  : extension_util_null,
  slice:        (seq, start, end) => extension_isSeq(seq) ? seq.slice(start, end) : extension_util_null
});

;// ../../node_modules/arquero/src/op/functions/bin.js
/**
 * Truncate a value to a bin boundary.
 * Useful for creating equal-width histograms.
 * Values outside the [min, max] range will be mapped to
 * -Infinity (< min) or +Infinity (> max).
 * @param {number} value - The value to bin.
 * @param {number} min - The minimum bin boundary.
 * @param {number} max - The maximum bin boundary.
 * @param {number} step - The step size between bin boundaries.
 * @param {number} [offset=0] - Offset in steps by which to adjust
 *  the bin value. An offset of 1 will return the next boundary.
 */
/* harmony default export */ function extension_bin(value, min, max, step, offset) {
  return value == null ? null
    : value < min ? -Infinity
    : value > max ? +Infinity
    : (
        value = Math.max(min, Math.min(value, max)),
        min + step * Math.floor(1e-14 + (value - min) / step + (offset || 0))
      );
}
;// ../../node_modules/arquero/src/util/pad.js
/* harmony default export */ function extension_pad(value, width, char = '0') {
  const s = value + '';
  const len = s.length;
  return len < width ? Array(width - len + 1).join(char) + s : s;
}
;// ../../node_modules/arquero/src/util/format-date.js


const extension_pad2 = v => (v < 10 ? '0' : '') + v;

const extension_formatYear = year => year < 0 ? '-' + extension_pad(-year, 6)
  : year > 9999 ? '+' + extension_pad(year, 6)
  : extension_pad(year, 4);

function extension_formatISO(year, month, date, hours, min, sec, ms, utc, short) {
  const suffix = utc ? 'Z' : '';
  return extension_formatYear(year) + '-' + extension_pad2(month + 1) + '-' + extension_pad2(date) + (
    !short || ms ? 'T' + extension_pad2(hours) + ':' + extension_pad2(min) + ':' + extension_pad2(sec) + '.' + extension_pad(ms, 3) + suffix
    : sec ? 'T' + extension_pad2(hours) + ':' + extension_pad2(min) + ':' + extension_pad2(sec) + suffix
    : min || hours || !utc ? 'T' + extension_pad2(hours) + ':' + extension_pad2(min) + suffix
    : ''
  );
}

function extension_formatDate(d, short) {
  return isNaN(d)
    ? 'Invalid Date'
    : extension_formatISO(
      d.getFullYear(),
      d.getMonth(),
      d.getDate(),
      d.getHours(),
      d.getMinutes(),
      d.getSeconds(),
      d.getMilliseconds(),
      false, short
    );
}

function extension_formatUTCDate(d, short) {
  return isNaN(d)
    ? 'Invalid Date'
    : extension_formatISO(
      d.getUTCFullYear(),
      d.getUTCMonth(),
      d.getUTCDate(),
      d.getUTCHours(),
      d.getUTCMinutes(),
      d.getUTCSeconds(),
      d.getUTCMilliseconds(),
      true, short
    );
}
;// ../../node_modules/arquero/src/util/is-iso-date-string.js
const extension_iso_re = /^([-+]\d{2})?\d{4}(-\d{2}(-\d{2})?)?(T\d{2}:\d{2}(:\d{2}(\.\d{3})?)?(Z|[-+]\d{2}:\d{2})?)?$/;

/* harmony default export */ function extension_is_iso_date_string(value) {
  return value.match(extension_iso_re);
}
;// ../../node_modules/arquero/src/util/parse-iso-date.js


/* harmony default export */ function extension_parse_iso_date(value, parse = Date.parse) {
  return extension_is_iso_date_string(value) ? parse(value) : value;
}
;// ../../node_modules/arquero/src/op/functions/date.js



const extension_msMinute = 6e4;
const extension_msDay = 864e5;
const extension_msWeek = 6048e5;

const extension_t0 = new Date();
const extension_t1 = new Date();
const extension_t = d => (
  extension_t0.setTime(typeof d === 'string' ? extension_parse_iso_date(d) : d),
  extension_t0
);

/**
 * Function to create a new Date value.
 * If no arguments are provided, the current time is used.
 * @param {number} [year] The year.
 * @param {number} [month=0] The (zero-based) month.
 * @param {number} [date=1] The date within the month.
 * @param {number} [hours=0] The hour within the day.
 * @param {number} [minutes=0] The minute within the hour.
 * @param {number} [seconds=0] The second within the minute.
 * @param {number} [milliseconds=0] The milliseconds within the second.
 * @return {date} The resuting Date value.
 */
function extension_datetime(year, month, date, hours, minutes, seconds, milliseconds) {
  return !arguments.length
    ? new Date(Date.now())
    : new Date(
        year,
        month || 0,
        date == null ? 1 : date,
        hours || 0,
        minutes || 0,
        seconds || 0,
        milliseconds || 0
      );
}

/**
 * Function to create a new Date value according to UTC time.
 * If no arguments are provided, the current time is used.
 * @param {number} [year] The year.
 * @param {number} [month=0] The (zero-based) month.
 * @param {number} [date=1] The date within the month.
 * @param {number} [hours=0] The hour within the day.
 * @param {number} [minutes=0] The minute within the hour.
 * @param {number} [seconds=0] The second within the minute.
 * @param {number} [milliseconds=0] The milliseconds within the second.
 * @return {date} The resuting Date value.
 */
function extension_utcdatetime(year, month, date, hours, minutes, seconds, milliseconds) {
  return !arguments.length
    ? new Date(Date.now())
    : new Date(Date.UTC(
        year,
        month || 0,
        date == null ? 1 : date,
        hours || 0,
        minutes || 0,
        seconds || 0,
        milliseconds || 0
      ));
}

function extension_dayofyear(date) {
  extension_t1.setTime(+date);
  extension_t1.setHours(0, 0, 0, 0);
  extension_t0.setTime(+extension_t1);
  extension_t0.setMonth(0);
  extension_t0.setDate(1);
  const tz = (extension_t1.getTimezoneOffset() - extension_t0.getTimezoneOffset()) * extension_msMinute;
  return Math.floor(1 + ((extension_t1 - extension_t0) - tz) / extension_msDay);
}

function extension_utcdayofyear(date) {
  extension_t1.setTime(+date);
  extension_t1.setUTCHours(0, 0, 0, 0);
  const t0 = Date.UTC(extension_t1.getUTCFullYear(), 0, 1);
  return Math.floor(1 + (extension_t1 - t0) / extension_msDay);
}

function extension_week(date, firstday) {
  const i = firstday || 0;
  extension_t1.setTime(+date);
  extension_t1.setDate(extension_t1.getDate() - (extension_t1.getDay() + 7 - i) % 7);
  extension_t1.setHours(0, 0, 0, 0);
  extension_t0.setTime(+date);
  extension_t0.setMonth(0);
  extension_t0.setDate(1);
  extension_t0.setDate(1 - (extension_t0.getDay() + 7 - i) % 7);
  extension_t0.setHours(0, 0, 0, 0);
  const tz = (extension_t1.getTimezoneOffset() - extension_t0.getTimezoneOffset()) * extension_msMinute;
  return Math.floor((1 + (extension_t1 - extension_t0) - tz) / extension_msWeek);
}

function extension_utcweek(date, firstday) {
  const i = firstday || 0;
  extension_t1.setTime(+date);
  extension_t1.setUTCDate(extension_t1.getUTCDate() - (extension_t1.getUTCDay() + 7 - i) % 7);
  extension_t1.setUTCHours(0, 0, 0, 0);
  extension_t0.setTime(+date);
  extension_t0.setUTCMonth(0);
  extension_t0.setUTCDate(1);
  extension_t0.setUTCDate(1 - (extension_t0.getUTCDay() + 7 - i) % 7);
  extension_t0.setUTCHours(0, 0, 0, 0);
  return Math.floor((1 + (extension_t1 - extension_t0)) / extension_msWeek);
}

/* harmony default export */ const extension_date = ({
  format_date:     (date, shorten) => extension_formatDate(extension_t(date), !shorten),
  format_utcdate:  (date, shorten) => extension_formatUTCDate(extension_t(date), !shorten),
  timestamp:       (date) => +extension_t(date),
  year:            (date) => extension_t(date).getFullYear(),
  quarter:         (date) => Math.floor(extension_t(date).getMonth() / 3),
  month:           (date) => extension_t(date).getMonth(),
  date:            (date) => extension_t(date).getDate(),
  dayofweek:       (date) => extension_t(date).getDay(),
  hours:           (date) => extension_t(date).getHours(),
  minutes:         (date) => extension_t(date).getMinutes(),
  seconds:         (date) => extension_t(date).getSeconds(),
  milliseconds:    (date) => extension_t(date).getMilliseconds(),
  utcyear:         (date) => extension_t(date).getUTCFullYear(),
  utcquarter:      (date) => Math.floor(extension_t(date).getUTCMonth() / 3),
  utcmonth:        (date) => extension_t(date).getUTCMonth(),
  utcdate:         (date) => extension_t(date).getUTCDate(),
  utcdayofweek:    (date) => extension_t(date).getUTCDay(),
  utchours:        (date) => extension_t(date).getUTCHours(),
  utcminutes:      (date) => extension_t(date).getUTCMinutes(),
  utcseconds:      (date) => extension_t(date).getUTCSeconds(),
  utcmilliseconds: (date) => extension_t(date).getUTCMilliseconds(),
  datetime: extension_datetime,
  dayofyear: extension_dayofyear,
  week: extension_week,
  utcdatetime: extension_utcdatetime,
  utcdayofyear: extension_utcdayofyear,
  utcweek: extension_utcweek,
  now: Date.now
});
;// ../../node_modules/arquero/src/op/functions/equal.js




/**
 * Compare two values for equality, using join semantics in which null
 * !== null. If the inputs are object-valued, a deep equality check
 * of array entries or object key-value pairs is performed.
 * @param {*} a The first input.
 * @param {*} b The second input.
 * @return {boolean} True if equal, false if not.
 */
function extension_equal(a, b) {
  return (a == null || b == null || a !== a || b !== b) ? false
    : a === b ? true
    : (extension_is_date(a) || extension_is_date(b)) ? +a === +b
    : (extension_is_regexp(a) && extension_is_regexp(b)) ? a + '' === b + ''
    : (extension_is_object(a) && extension_is_object(b)) ? extension_deepEqual(a, b)
    : false;
}

function extension_deepEqual(a, b) {
  if (Object.getPrototypeOf(a) !== Object.getPrototypeOf(b)) {
    return false;
  }

  if (a.length || b.length) {
    return extension_arrayEqual(a, b);
  }

  const keysA = Object.keys(a);
  const keysB = Object.keys(b);
  if (keysA.length !== keysB.length) {
    return false;
  }
  keysA.sort();
  keysB.sort();

  if (!extension_arrayEqual(keysA, keysB, (a, b) => a === b)) {
    return false;
  }

  const n = keysA.length;
  for (let i = 0; i < n; ++i) {
    const k = keysA[i];
    if (!extension_equal(a[k], b[k])) {
      return false;
    }
  }

  return true;
}

function extension_arrayEqual(a, b, test = extension_equal) {
  const n = a.length;
  if (n !== b.length) return false;

  for (let i = 0; i < n; ++i) {
    if (!test(a[i], b[i])) {
      return false;
    }
  }

  return true;
}
;// ../../node_modules/arquero/src/op/functions/json.js
/* harmony default export */ const extension_json = ({
  parse_json: (str) => JSON.parse(str),
  to_json:    (val) => JSON.stringify(val)
});
;// ../../node_modules/arquero/src/util/random.js


let extension_source = Math.random;

function extension_random() {
  return extension_source();
}

/**
 * Set a seed value for random number generation.
 * If the seed is a valid number, a 32-bit linear congruential generator
 * with the given seed will be used to generate random values.
 * If the seed is null, undefined, or not a valid number, the random
 * number generator will revert to Math.random.
 * @param {number} seed The random seed value. Should either be an
 *  integer or a fraction between 0 and 1.
 */
function extension_seed(seed) {
  extension_source = isValid(seed) && isFinite(seed = +seed) ? extension_random_lcg(seed) : Math.random;
}

function extension_random_lcg(seed) {
  const a = 0x19660D;
  const c = 0x3C6EF35F;
  const m = 1 / 0x100000000;
  seed = (0 <= seed && seed < 1 ? seed / m : Math.abs(seed)) | 0;

  // Random numbers using a Linear Congruential Generator with seed value
  // https://en.wikipedia.org/wiki/Linear_congruential_generator
  return () => (seed = a * seed + c | 0, m * (seed >>> 0));
}
;// ../../node_modules/arquero/src/op/functions/math.js


/* harmony default export */ const extension_math = ({
  random: extension_random,
  is_nan:    Number.isNaN,
  is_finite: Number.isFinite,

  abs:      Math.abs,
  cbrt:     Math.cbrt,
  ceil:     Math.ceil,
  clz32:    Math.clz32,
  exp:      Math.exp,
  expm1:    Math.expm1,
  floor:    Math.floor,
  fround:   Math.fround,
  greatest: Math.max,
  least:    Math.min,
  log:      Math.log,
  log10:    Math.log10,
  log1p:    Math.log1p,
  log2:     Math.log2,
  pow:      Math.pow,
  round:    Math.round,
  sign:     Math.sign,
  sqrt:     Math.sqrt,
  trunc:    Math.trunc,

  degrees:  (rad) => 180 * rad / Math.PI,
  radians:  (deg) => Math.PI * deg / 180,
  acos:     Math.acos,
  acosh:    Math.acosh,
  asin:     Math.asin,
  asinh:    Math.asinh,
  atan:     Math.atan,
  atan2:    Math.atan2,
  atanh:    Math.atanh,
  cos:      Math.cos,
  cosh:     Math.cosh,
  sin:      Math.sin,
  sinh:     Math.sinh,
  tan:      Math.tan,
  tanh:     Math.tanh
});
;// ../../node_modules/arquero/src/util/is-map.js
/* harmony default export */ function extension_is_map(value) {
  return value instanceof Map;
}
;// ../../node_modules/arquero/src/util/is-set.js
/* harmony default export */ function extension_is_set(value) {
  return value instanceof Set;
}
;// ../../node_modules/arquero/src/util/is-map-or-set.js



/* harmony default export */ function extension_is_map_or_set(value) {
  return extension_is_map(value) || extension_is_set(value);
}
;// ../../node_modules/arquero/src/op/functions/object.js





function extension_object_array(iter) {
  return Array.from(iter);
}

/* harmony default export */ const extension_object = ({
  has:      (obj, key) => extension_is_map_or_set(obj) ? obj.has(key)
              : obj != null ? extension_util_has(obj, key)
              : false,
  keys:     (obj) => extension_is_map(obj) ? extension_object_array(obj.keys())
              : obj != null ? Object.keys(obj)
              : [],
  values:   (obj) => extension_is_map_or_set(obj) ? extension_object_array(obj.values())
              : obj != null ? Object.values(obj)
              : [],
  entries:  (obj) => extension_is_map_or_set(obj) ? extension_object_array(obj.entries())
              : obj != null ? Object.entries(obj)
              : [],
  object:   (entries) => entries ? Object.fromEntries(entries) : extension_util_null
});
;// ../../node_modules/arquero/src/op/functions/recode.js


/**
 * Recodes an input value to an alternative value, based on a provided
 * value map. If a fallback value is specified, it will be returned when
 * a matching value is not found in the map; otherwise, the input value
 * is returned unchanged.
 * @param {*} value The value to recode. The value must be safely
 *  coercible to a string for lookup against the value map.
 * @param {object|Map} map An object or Map with input values for keys and
 *  output recoded values as values. If a non-Map object, only the object's
 *  own properties will be considered.
 * @param {*} [fallback] A default fallback value to use if the input
 *  value is not found in the value map.
 * @return {*} The recoded value.
 */
/* harmony default export */ function extension_recode(value, map, fallback) {
  if (map instanceof Map) {
    if (map.has(value)) return map.get(value);
  } else if (extension_util_has(map, value)) {
    return map[value];
  }
  return fallback !== undefined ? fallback : value;
}
;// ../../node_modules/arquero/src/op/functions/sequence.js
/**
 * Returns an array containing an arithmetic sequence from the start value
 * to the stop value, in step increments. If step is positive, the last
 * element is the largest start + i * step less than stop; if step is
 * negative, the last element is the smallest start + i * step greater
 * than stop. If the returned array would contain an infinite number of
 * values, an empty range is returned.
 * @param {number} [start=0] The starting value of the sequence.
 * @param {number} [stop] The stopping value of the sequence.
 *  The stop value is exclusive; it is not included in the result.
 * @param {number} [step=1] The step increment between sequence values.
 * @return {number[]} The generated sequence.
 */
/* harmony default export */ function extension_sequence(start, stop, step) {
  let n = arguments.length;
  start = +start;
  stop = +stop;
  step = n < 2
    ? (stop = start, start = 0, 1)
    : n < 3 ? 1 : +step;

  n = Math.max(0, Math.ceil((stop - start) / step)) | 0;
  const seq = new Array(n);

  for (let i = 0; i < n; ++i) {
    seq[i] = start + i * step;
  }

  return seq;
}
;// ../../node_modules/arquero/src/op/functions/string.js
/* harmony default export */ const extension_string = ({
  parse_date:   (str) => str == null ? str : new Date(str),
  parse_float:  (str) => str == null ? str : Number.parseFloat(str),
  parse_int:    (str, radix) => str == null ? str : Number.parseInt(str, radix),
  endswith:     (str, search, length) => str == null ? false
                  : String(str).endsWith(search, length),
  match:        (str, regexp, index) => {
                  const m = str == null ? str : String(str).match(regexp);
                  return index == null || m == null ? m
                    : typeof index === 'number' ? m[index]
                    : m.groups ? m.groups[index]
                    : null;
                },
  normalize:    (str, form) => str == null ? str
                  : String(str).normalize(form),
  padend:       (str, len, fill) => str == null ? str
                  : String(str).padEnd(len, fill),
  padstart:     (str, len, fill) => str == null ? str
                  : String(str).padStart(len, fill),
  upper:        (str) => str == null ? str
                  : String(str).toUpperCase(),
  lower:        (str) => str == null ? str
                  : String(str).toLowerCase(),
  repeat:       (str, num) => str == null ? str
                  : String(str).repeat(num),
  replace:      (str, pattern, replacement) => str == null ? str
                  : String(str).replace(pattern, String(replacement)),
  substring:    (str, start, end) => str == null ? str
                  : String(str).substring(start, end),
  split:        (str, separator, limit) => str == null ? []
                  : String(str).split(separator, limit),
  startswith:   (str, search, length) => str == null ? false
                  : String(str).startsWith(search, length),
  trim:         (str) => str == null ? str
                  : String(str).trim()
});
;// ../../node_modules/arquero/src/op/functions/index.js











/* harmony default export */ const extension_op_functions = ({
  bin: extension_bin,
  equal: extension_equal,
  recode: extension_recode,
  sequence: extension_sequence,
  ...extension_array,
  ...extension_date,
  ...extension_json,
  ...extension_math,
  ...extension_object,
  ...extension_string
});
;// ../../node_modules/arquero/src/util/is-bigint.js
/* harmony default export */ function extension_is_bigint(value) {
  return typeof value === 'bigint';
}
;// ../../node_modules/arquero/src/util/to-string.js


/* harmony default export */ function extension_to_string(v) {
  return v === undefined ? v + ''
    : extension_is_bigint(v) ? v + 'n'
    : JSON.stringify(v);
}
;// ../../node_modules/arquero/src/op/op.js



/* harmony default export */ function extension_op_op(name, fields = [], params = []) {
  return new extension_Op(name, extension_to_array(fields), extension_to_array(params));
}

class extension_Op {
  constructor(name, fields, params) {
    this.name = name;
    this.fields = fields;
    this.params = params;
  }
  toString() {
    const args = [
      ...this.fields.map(f => `d[${extension_to_string(f)}]`),
      ...this.params.map(extension_to_string)
    ];
    return `d => op.${this.name}(${args})`;
  }
  toObject() {
    return { expr: this.toString(), func: true };
  }
}
;// ../../node_modules/arquero/src/op/op-api.js



const extension_any = (field) => extension_op_op('any', field);
const extension_count = () => extension_op_op('count');
const extension_array_agg = (field) => extension_op_op('array_agg', field);
const extension_array_agg_distinct = (field) => extension_op_op('array_agg_distinct', field);
const extension_map_agg = (key, value) => extension_op_op('map_agg', [key, value]);
const extension_object_agg = (key, value) => extension_op_op('object_agg', [key, value]);
const extension_entries_agg = (key, value) => extension_op_op('entries_agg', [key, value]);

/**
 * @typedef {import('../table/transformable').Struct} Struct
 */

/**
 * All table expression operations including normal functions,
 * aggregate functions, and window functions.
 */
/* harmony default export */ const extension_op_api = ({
  ...extension_op_functions,

  /**
   * Generate an object representing the current table row.
   * @param {...string} names The column names to include in the object.
   *  If unspecified, all columns are included.
   * @return {Struct} The generated row object.
   */
  row_object: (...names) => extension_op_op('row_object', null, names.flat()),

  /**
   * Aggregate function to count the number of records (rows).
   * @returns {number} The count of records.
   */
  count: extension_count,

  /**
   * Aggregate function returning an arbitrary observed value.
   * @param {*} field The data field.
   * @return {*} An arbitrary observed value.
   */
  any: extension_any,

  /**
   * Aggregate function to collect an array of values.
   * @param {*} field The data field.
   * @return {Array} A list of values.
   */
  array_agg: extension_array_agg,

  /**
   * Aggregate function to collect an array of distinct (unique) values.
   * @param {*} field The data field.
   * @return {Array} An array of unique values.
   */
  array_agg_distinct: extension_array_agg_distinct,

  /**
   * Aggregate function to create an object given input key and value fields.
   * @param {*} key The object key field.
   * @param {*} value The object value field.
   * @return {Struct} An object of key-value pairs.
   */
  object_agg: extension_object_agg,

  /**
   * Aggregate function to create a Map given input key and value fields.
   * @param {*} key The object key field.
   * @param {*} value The object value field.
   * @return {Map} A Map of key-value pairs.
   */
  map_agg: extension_map_agg,

  /**
   * Aggregate function to create an array in the style of Object.entries()
   * given input key and value fields.
   * @param {*} key The object key field.
   * @param {*} value The object value field.
   * @return {[[any, any]]} An array of [key, value] arrays.
   */
  entries_agg: extension_entries_agg,

  /**
   * Aggregate function to count the number of valid values.
   * Invalid values are null, undefined, or NaN.
   * @param {*} field The data field.
   * @return {number} The count of valid values.
   */
  valid: (field) => extension_op_op('valid', field),

  /**
   * Aggregate function to count the number of invalid values.
   * Invalid values are null, undefined, or NaN.
   * @param {*} field The data field.
   * @return {number} The count of invalid values.
   */
  invalid: (field) => extension_op_op('invalid', field),

  /**
   * Aggregate function to count the number of distinct values.
   * @param {*} field The data field.
   * @return {number} The count of distinct values.
   */
  distinct: (field) => extension_op_op('distinct', field),

  /**
   * Aggregate function to determine the mode (most frequent) value.
   * @param {*} field The data field.
   * @return {number} The mode value.
   */
  mode: (field) => extension_op_op('mode', field),

  /**
   * Aggregate function to sum values.
   * @param {string} field The data field.
   * @return {number} The sum of the values.
   */
  sum: (field) => extension_op_op('sum', field),

  /**
   * Aggregate function to multiply values.
   * @param {*} field The data field.
   * @return {number} The product of the values.
   */
  product: (field) => extension_op_op('product', field),

  /**
   * Aggregate function for the mean (average) value.
   * @param {*} field The data field.
   * @return {number} The mean (average) of the values.
   */
  mean: (field) => extension_op_op('mean', field),

  /**
   * Aggregate function for the average (mean) value.
   * @param {*} field The data field.
   * @return {number} The average (mean) of the values.
   */
  average: (field) => extension_op_op('average', field),

  /**
   * Aggregate function for the sample variance.
   * @param {*} field The data field.
   * @return {number} The sample variance of the values.
   */
  variance: (field) => extension_op_op('variance', field),

  /**
   * Aggregate function for the population variance.
   * @param {*} field The data field.
   * @return {number} The population variance of the values.
   */
  variancep: (field) => extension_op_op('variancep', field),

  /**
   * Aggregate function for the sample standard deviation.
   * @param {*} field The data field.
   * @return {number} The sample standard deviation of the values.
   */
  stdev: (field) => extension_op_op('stdev', field),

  /**
   * Aggregate function for the population standard deviation.
   * @param {*} field The data field.
   * @return {number} The population standard deviation of the values.
   */
  stdevp: (field) => extension_op_op('stdevp', field),

  /**
   * Aggregate function for the minimum value.
   * @param {*} field The data field.
   * @return {number} The minimum value.
   */
  min: (field) => extension_op_op('min', field),

  /**
   * Aggregate function for the maximum value.
   * @param {*} field The data field.
   * @return {number} The maximum value.
   */
  max: (field) => extension_op_op('max', field),

  /**
   * Aggregate function to compute the quantile boundary
   * of a data field for a probability threshold.
   * @param {*} field The data field.
   * @param {number} p The probability threshold.
   * @return {number} The quantile value.
   */
  quantile: (field, p) => extension_op_op('quantile', field, p),

  /**
   * Aggregate function for the median value.
   * This is a shorthand for the 0.5 quantile value.
   * @param {*} field The data field.
   * @return {number} The median value.
   */
  median: (field) => extension_op_op('median', field),

  /**
   * Aggregate function for the sample covariance between two variables.
   * @param {*} field1 The first data field.
   * @param {*} field2 The second data field.
   * @return {number} The sample covariance of the values.
   */
  covariance: (field1, field2) => extension_op_op('covariance', [field1, field2]),

  /**
   * Aggregate function for the population covariance between two variables.
   * @param {*} field1 The first data field.
   * @param {*} field2 The second data field.
   * @return {number} The population covariance of the values.
   */
  covariancep: (field1, field2) => extension_op_op('covariancep', [field1, field2]),

  /**
   * Aggregate function for the product-moment correlation between two variables.
   * To instead compute a rank correlation, compute the average ranks for each
   * variable and then apply this function to the result.
   * @param {*} field1 The first data field.
   * @param {*} field2 The second data field.
   * @return {number} The correlation between the field values.
   */
  corr: (field1, field2) => extension_op_op('corr', [field1, field2]),

  /**
   * Aggregate function for calculating a binning scheme in terms of
   * the minimum bin boundary, maximum bin boundary, and step size.
   * @param {*} field The data field.
   * @param {number} [maxbins=15] The maximum number of allowed bins.
   * @param {boolean} [nice=true] Flag indicating if the bin min and max
   *  should snap to "nice" human-friendly values.
   * @param {number} [minstep] The minimum allowed step size between bins.
   * @param {number} [step] The exact step size to use between bins.
   *  If specified, the maxbins and minstep arguments are ignored.
   * @return {[number, number, number]} The bin [min, max, and step] values.
   */
  bins: (field, maxbins, nice, minstep) =>
    extension_op_op('bins', field, [maxbins, nice, minstep]),

  /**
   * Window function to assign consecutive row numbers, starting from 1.
   * @return {number} The row number value.
   */
  row_number: () => extension_op_op('row_number'),

  /**
   * Window function to assign a rank to each value in a group, starting
   * from 1. Peer values are assigned the same rank. Subsequent ranks
   * reflect the number of prior values: if the first two values tie for
   * rank 1, the third value is assigned rank 3.
   * @return {number} The rank value.
   */
  rank: () => extension_op_op('rank'),

  /**
   * Window function to assign a fractional (average) rank to each value in
   * a group, starting from 1. Peer values are assigned the average of their
   * indices: if the first two values tie, both will be assigned rank 1.5.
   * @return {number} The peer-averaged rank value.
   */
  avg_rank: () => extension_op_op('avg_rank'),

  /**
   * Window function to assign a dense rank to each value in a group,
   * starting from 1. Peer values are assigned the same rank. Subsequent
   * ranks do not reflect the number of prior values: if the first two
   * values tie for rank 1, the third value is assigned rank 2.
   * @return {number} The dense rank value.
   */
  dense_rank: () => extension_op_op('dense_rank'),

  /**
   * Window function to assign a percentage rank to each value in a group.
   * The percent is calculated as (rank - 1) / (group_size - 1).
   * @return {number} The percentage rank value.
   */
  percent_rank: () => extension_op_op('percent_rank'),

  /**
   * Window function to assign a cumulative distribution value between 0 and 1
   * to each value in a group.
   * @return {number} The cumulative distribution value.
   */
  cume_dist: () => extension_op_op('cume_dist'),

  /**
   * Window function to assign a quantile (e.g., percentile) value to each
   * value in a group. Accepts an integer parameter indicating the number of
   * buckets to use (e.g., 100 for percentiles, 5 for quintiles).
   * @param {number} num The number of buckets for ntile calculation.
   * @return {number} The quantile value.
   */
  ntile: (num) => extension_op_op('ntile', null, num),

  /**
   * Window function to assign a value that precedes the current value by
   * a specified number of positions. If no such value exists, returns a
   * default value instead.
   * @param {*} field The data field.
   * @param {number} [offset=1] The lag offset from the current value.
   * @param {*} [defaultValue=undefined] The default value.
   * @return {*} The lagging value.
   */
  lag: (field, offset, defaultValue) => extension_op_op('lag', field, [offset, defaultValue]),

  /**
   * Window function to assign a value that follows the current value by
   * a specified number of positions. If no such value exists, returns a
   * default value instead.
   * @param {*} field The data field.
   * @param {number} [offset=1] The lead offset from the current value.
   * @param {*} [defaultValue=undefined] The default value.
   * @return {*} The leading value.
   */
  lead: (field, offset, defaultValue) => extension_op_op('lead', field, [offset, defaultValue]),

  /**
   * Window function to assign the first value in a sliding window frame.
   * @param {*} field The data field.
   * @return {*} The first value in the current frame.
   */
  first_value: (field) => extension_op_op('first_value', field),

  /**
   * Window function to assign the last value in a sliding window frame.
   * @param {*} field The data field.
   * @return {*} The last value in the current frame.
   */
  last_value: (field) => extension_op_op('last_value', field),

  /**
   * Window function to assign the nth value in a sliding window frame
   * (counting from 1), or undefined if no such value exists.
   * @param {*} field The data field.
   * @param {number} nth The nth position, starting from 1.
   * @return {*} The nth value in the current frame.
   */
  nth_value: (field, nth) => extension_op_op('nth_value', field, nth),

  /**
   * Window function to fill in missing values with preceding values.
   * @param {*} field The data field.
   * @param {*} [defaultValue=undefined] The default value.
   * @return {*} The current value if valid, otherwise the first preceding
   *  valid value. If no such value exists, returns the default value.
   */
  fill_down: (field, defaultValue) => extension_op_op('fill_down', field, defaultValue),

  /**
   * Window function to fill in missing values with subsequent values.
   * @param {*} field The data field.
   * @param {*} [defaultValue=undefined] The default value.
   * @return {*} The current value if valid, otherwise the first subsequent
   *  valid value. If no such value exists, returns the default value.
   */
  fill_up: (field, defaultValue) => extension_op_op('fill_up', field, defaultValue)
});
;// ../../node_modules/arquero/src/util/unique-name.js


/* harmony default export */ function extension_unique_name(names, name) {
  names = extension_is_map_or_set(names) ? names : new Set(names);
  let uname = name;
  let index = 0;

  while (names.has(uname)) {
    uname = name + ++index;
  }

  return uname;
}
;// ../../node_modules/arquero/src/table/regroup.js




/**
 * Regroup table rows in response to a BitSet filter.
 * @param {GroupBySpec} groups The current groupby specification.
 * @param {BitSet} filter The filter to apply.
 */
function extension_regroup(groups, filter) {
  if (!groups || !filter) return groups;

  // check for presence of rows for each group
  const { keys, rows, size } = groups;
  const map = new Int32Array(size);
  filter.scan(row => map[keys[row]] = 1);

  // check sum, exit early if all groups occur
  const sum = map.reduce((sum, val) => sum + val, 0);
  if (sum === size) return groups;

  // create group index map, filter exemplar rows
  const _rows = Array(sum);
  let _size = 0;
  for (let i = 0; i < size; ++i) {
    if (map[i]) _rows[map[i] = _size++] = rows[i];
  }

  // re-index the group keys
  const _keys = new Uint32Array(keys.length);
  filter.scan(row => _keys[row] = map[keys[row]]);

  return { ...groups, keys: _keys, rows: _rows, size: _size };
}

/**
 * Regroup table rows in response to a re-indexing.
 * This operation may or may not involve filtering of rows.
 * @param {GroupBySpec} groups The current groupby specification.
 * @param {Function} scan Function to scan new row indices.
 * @param {boolean} filter Flag indicating if filtering may occur.
 * @param {number} nrows The number of rows in the new table.
 */
function extension_reindex(groups, scan, filter, nrows) {
  const { keys, rows, size } = groups;
  let _rows = rows;
  let _size = size;
  let map = null;

  if (filter) {
    // check for presence of rows for each group
    map = new Int32Array(size);
    scan(row => map[keys[row]] = 1);

    // check sum, regroup if not all groups occur
    const sum = map.reduce((sum, val) => sum + val, 0);
    if (sum !== size) {
      // create group index map, filter exemplar rows
      _rows = Array(sum);
      _size = 0;
      for (let i = 0; i < size; ++i) {
        if (map[i]) _rows[map[i] = _size++] = rows[i];
      }
    }
  }

  // re-index the group keys
  let r = -1;
  const _keys = new Uint32Array(nrows);
  const fn = _size !== size
    ? row => _keys[++r] = map[keys[row]]
    : row => _keys[++r] = keys[row];
  scan(fn);

  return { ...groups, keys: _keys, rows: _rows, size: _size };
}

function extension_nest(table, idx, obj, type) {
  const agg = type === 'map' || type === true ? extension_map_agg
    : type === 'entries' ? extension_entries_agg
    : type === 'object' ? extension_object_agg
    : extension_util_error('groups option must be "map", "entries", or "object".');

  const { names } = table.groups();
  const col = extension_unique_name(table.columnNames(), '_');

  // create table with one column of row objects
  // then aggregate into per-group arrays
  let t = table
    .select()
    .reify(idx)
    .create({ data: { [col]: obj } })
    .rollup({ [col]: extension_array_agg(col) });

  // create nested structures for each level of grouping
  for (let i = names.length; --i >= 0;) {
    t = t
      .groupby(names.slice(0, i))
      .rollup({ [col]: agg(names[i], col) });
  }

  // return the final aggregated structure
  return t.get(col);
}
;// ../../node_modules/arquero/src/expression/ast/constants.js
const extension_ArrayPattern = 'ArrayPattern';
const extension_ArrowFunctionExpression = 'ArrowFunctionExpression';
const extension_FunctionExpression = 'FunctionExpression';
const extension_Identifier = 'Identifier';
const extension_Literal = 'Literal';
const extension_MemberExpression = 'MemberExpression';
const extension_ObjectExpression = 'ObjectExpression';
const extension_ObjectPattern = 'ObjectPattern';
const extension_Property = 'Property';

const extension_constants_Column = 'Column';
const extension_Constant = 'Constant';
const extension_Dictionary = 'Dictionary';
const extension_constants_Function = 'Function';
const extension_Parameter = 'Parameter';
const extension_constants_Op = 'Op';
;// ../../node_modules/arquero/src/expression/codegen.js



const extension_visit = (node, opt) => {
  const f = extension_visitors[node.type];
  return f
    ? f(node, opt)
    : extension_util_error(`Unsupported expression construct: ${node.type}`);
};

const extension_binary = (node, opt) => {
  return '(' + extension_visit(node.left, opt) + ' ' + node.operator + ' ' + extension_visit(node.right, opt) + ')';
};

const extension_func = (node, opt) => {
  return '(' + extension_list(node.params, opt) + ')=>' + extension_visit(node.body, opt);
};

const extension_call = (node, opt) => {
  return extension_visit(node.callee, opt) + '(' + extension_list(node.arguments, opt) + ')';
};

const extension_list = (array, opt, delim = ',') => {
  return array.map(node => extension_visit(node, opt)).join(delim);
};

const extension_codegen_name = node => node.computed
  ? `[${extension_to_string(node.name)}]`
  : `.${node.name}`;

const extension_ref = (node, opt, method) => {
  const table = node.table || '';
  return `data${table}${extension_codegen_name(node)}.${method}(${opt.index}${table})`;
};

const extension_visitors = {
  Constant: node => node.raw,
  Column: (node, opt) => extension_ref(node, opt, 'get'),
  Dictionary: (node, opt) => extension_ref(node, opt, 'key'),
  Function: node => `fn.${node.name}`,
  Parameter: node => `$${extension_codegen_name(node)}`,
  Op: (node, opt) => `op(${extension_to_string(node.name)},${opt.op || opt.index})`,
  Literal: node => node.raw,
  Identifier: node => node.name,
  TemplateLiteral: (node, opt) => {
    const { quasis, expressions } = node;
    const n = expressions.length;
    let t = quasis[0].value.raw;
    for (let i = 0; i < n;) {
      t += '${' + extension_visit(expressions[i], opt) + '}' + quasis[++i].value.raw;
    }
    return '`' + t + '`';
  },
  MemberExpression: (node, opt) => {
    const d = !node.computed;
    const o = extension_visit(node.object, opt);
    const p = extension_visit(node.property, opt);
    return o + (d ? '.' + p : '[' + p + ']');
  },
  CallExpression: extension_call,
  NewExpression: (node, opt) => {
    return 'new ' + extension_call(node, opt);
  },
  ArrayExpression: (node, opt) => {
    return '[' + extension_list(node.elements, opt) + ']';
  },
  AssignmentExpression: extension_binary,
  BinaryExpression: extension_binary,
  LogicalExpression: extension_binary,
  UnaryExpression: (node, opt) => {
    return '(' + node.operator + extension_visit(node.argument, opt) + ')';
  },
  ConditionalExpression: (node, opt) => {
    return '(' + extension_visit(node.test, opt) +
      '?' + extension_visit(node.consequent, opt) +
      ':' + extension_visit(node.alternate, opt) + ')';
  },
  ObjectExpression: (node, opt) => {
    return '({' + extension_list(node.properties, opt) + '})';
  },
  Property: (node, opt) => {
    const key = extension_visit(node.key, opt);
    return (node.computed ? `[${key}]` : key) + ':' + extension_visit(node.value, opt);
  },

  ArrowFunctionExpression: extension_func,
  FunctionExpression: extension_func,
  FunctionDeclaration: extension_func,

  ArrayPattern: (node, opt) => {
    return '[' + extension_list(node.elements, opt) + ']';
  },
  ObjectPattern: (node, opt) => {
    return '{' + extension_list(node.properties, opt) + '}';
  },
  VariableDeclaration: (node, opt) => {
    return node.kind + ' ' + extension_list(node.declarations, opt, ',');
  },
  VariableDeclarator: (node, opt) => {
    return extension_visit(node.id, opt) + '=' + extension_visit(node.init, opt);
  },
  SpreadElement: (node, opt) => {
    return '...' + extension_visit(node.argument, opt);
  },

  BlockStatement: (node, opt) => {
    return '{' + extension_list(node.body, opt, ';') + ';}';
  },
  BreakStatement: () => {
    return 'break';
  },
  ExpressionStatement: (node, opt) => {
    return extension_visit(node.expression, opt);
  },
  IfStatement: (node, opt) => {
    return 'if (' + extension_visit(node.test, opt) + ')'
      + extension_visit(node.consequent, opt)
      + (node.alternate ? ' else ' + extension_visit(node.alternate, opt) : '');
  },
  SwitchStatement: (node, opt) => {
    return 'switch (' + extension_visit(node.discriminant, opt) + ') {'
     + extension_list(node.cases, opt, '')
     + '}';
  },
  SwitchCase: (node, opt) => {
    return (node.test ? 'case ' + extension_visit(node.test, opt) : 'default')
      + ': '
      + extension_list(node.consequent, opt, ';') + ';';
  },
  ReturnStatement: (node, opt) => {
    return 'return ' + extension_visit(node.argument, opt);
  },
  Program: (node, opt) => extension_visit(node.body[0], opt)
};

/* harmony default export */ function extension_codegen(node, opt = { index: 'row' }) {
  return extension_visit(node, opt);
}
;// ../../node_modules/arquero/src/util/bins.js
/* harmony default export */ function extension_bins(min, max, maxbins = 15, nice = true, minstep = 0, step) {
  const base = 10;
  const logb = Math.LN10;

  if (step == null) {
    const level = Math.ceil(Math.log(maxbins) / logb);
    const span = (max - min) || Math.abs(min) || 1;
    const div = [5, 2];

    step = Math.max(
      minstep,
      Math.pow(base, Math.round(Math.log(span) / logb) - level)
    );

    // increase step size if too many bins
    while (Math.ceil(span / step) > maxbins) {
      step *= base;
    }

    // decrease step size if it stays within maxbins
    const n = div.length;
    for (let i = 0; i < n; ++i) {
      const v = step / div[i];
      if (v >= minstep && span / v <= maxbins) {
        step = v;
      }
    }
  }

  // snap to "nice" boundaries
  if (nice) {
    let v = Math.log(step);
    const precision = v >= 0 ? 0 : ~~(-v / logb) + 1;
    const eps = Math.pow(base, -precision - 1);
    v = Math.floor(min / step + eps) * step;
    min = min < v ? v - step : v;
    max = Math.ceil(max / step) * step;
  }

  return [
    min,
    max === min ? min + step : max,
    step
  ];
}
;// ../../node_modules/arquero/src/util/key-function.js





function extension_key(value) {
  const type = typeof value;
  return type === 'string' ? `"${value}"`
    : type !== 'object' || !value ? value
    : extension_is_date(value) ? +value
    : extension_is_array(value) || extension_is_typed_array(value) ? `[${value.map(extension_key)}]`
    : extension_is_regexp(value) ? value + ''
    : extension_objectKey(value);
}

function extension_objectKey(value) {
  let s = '{';
  let i = -1;
  for (const k in value) {
    if (++i > 0) s += ',';
    s += `"${k}":${extension_key(value[k])}`;
  }
  s += '}';
  return s;
}

/* harmony default export */ function extension_key_function(get, nulls) {
  const n = get.length;
  return n === 1
    ? (row, data) => extension_key(get[0](row, data))
    : (row, data) => {
        let s = '';
        for (let i = 0; i < n; ++i) {
          if (i > 0) s += '|';
          const v = get[i](row, data);
          if (nulls && (v == null || v !== v)) return null;
          s += extension_key(v);
        }
        return s;
      };
}
;// ../../node_modules/arquero/src/util/distinct-map.js


/* harmony default export */ function extension_distinct_map() {
  const map = new Map();
  return {
    count() {
      return map.size;
    },
    values() {
      return Array.from(map.values(), _ => _.v);
    },
    increment(v) {
      const k = extension_key(v);
      const e = map.get(k);
      e ? ++e.n : map.set(k, { v, n: 1 });
    },
    decrement(v) {
      const k = extension_key(v);
      const e = map.get(k);
      e.n === 1 ? map.delete(k) : --e.n;
    },
    forEach(fn) {
      map.forEach(({ v, n }) => fn(v, n));
    }
  };
}
;// ../../node_modules/arquero/src/util/no-op.js
/* harmony default export */ function extension_no_op() {}
;// ../../node_modules/arquero/src/util/product.js
/* harmony default export */ function extension_product(values, start = 0, stop = values.length) {
  let prod = values[start++];

  for (let i = start; i < stop; ++i) {
    prod *= values[i];
  }

  return prod;
}
;// ../../node_modules/arquero/src/op/aggregate-functions.js







/**
 * Initialize an aggregate operator.
 */
function extension_initOp(op) {
  op.init = op.init || extension_no_op;
  op.add = op.add || extension_no_op;
  op.rem = op.rem || extension_no_op;
  return op;
}

function extension_initProduct(s, value) {
  s.product_v = false;
  return s.product = value;
}

/**
 * Initialize an aggregate operator.
 * @callback AggregateInit
 * @param {object} state The aggregate state object.
 * @return {void}
 */

/**
 * Add a value to an aggregate operator.
 * @callback AggregateAdd
 * @param {object} state The aggregate state object.
 * @param {*} value The value to add.
 * @return {void}
 */

/**
 * Remove a value from an aggregate operator.
 * @callback AggregateRem
 * @param {object} state The aggregate state object.
 * @param {*} value The value to remove.
 * @return {void}
 */

/**
 * Retrive an output value from an aggregate operator.
 * @callback AggregateValue
 * @param {object} state The aggregate state object.
 * @return {*} The output value.
 */

/**
 * An operator instance for an aggregate function.
 * @typedef {object} AggregateOperator
 * @property {AggregateInit} init Initialize the operator.
 * @property {AggregateAdd} add Add a value to the operator state.
 * @property {AggregateRem} rem Remove a value from the operator state.
 * @property {AggregateValue} value Retrieve an output value.
 */

/**
 * Create a new aggregate operator instance.
 * @callback AggregateCreate
 * @param {...any} params The aggregate operator parameters.
 * @return {AggregateOperator} The instantiated aggregate operator.
 */

/**
 * An operator definition for an aggregate function.
 * @typedef {object} AggregateDef
 * @property {AggregateCreate} create Create a new operator instance.
 * @property {number[]} param Two-element array containing the
 *  counts of input fields and additional parameters.
 * @property {string[]} [req] Names of operators required by this one.
 * @property {string[]} [stream] Names of operators required by this one
 *  for streaming operations (value removes).
 */

/**
 * Aggregate operator definitions.
 */
/* harmony default export */ const extension_aggregate_functions = ({
  /** @type {AggregateDef} */
  count: {
    create: () => extension_initOp({
      value: s => s.count
    }),
    param: []
  },

  /** @type {AggregateDef} */
  array_agg: {
    create: () => extension_initOp({
      init: s => s.values = true,
      value: s => s.list.values(s.stream)
    }),
    param: [1]
  },

  /** @type {AggregateDef} */
  object_agg: {
    create: () => extension_initOp({
      init:  s => s.values = true,
      value: s => Object.fromEntries(s.list.values())
    }),
    param: [2]
  },

  /** @type {AggregateDef} */
  map_agg: {
    create: () => extension_initOp({
      init:  s => s.values = true,
      value: s => new Map(s.list.values())
    }),
    param: [2]
  },

  /** @type {AggregateDef} */
  entries_agg: {
    create: () => extension_initOp({
      init:  s => s.values = true,
      value: s => s.list.values(s.stream)
    }),
    param: [2]
  },

  /** @type {AggregateDef} */
  any: {
    create: () => extension_initOp({
      add: (s, v) => { if (s.any == null) s.any = v; },
      value: s => s.valid ? s.any : extension_util_null
    }),
    param: [1]
  },

  /** @type {AggregateDef} */
  valid: {
    create: () => extension_initOp({
      value: s => s.valid
    }),
    param: [1]
  },

  /** @type {AggregateDef} */
  invalid: {
    create: () => extension_initOp({
      value: s => s.count - s.valid
    }),
    param: [1]
  },

  /** @type {AggregateDef} */
  distinct: {
    create: () => ({
      init: s => s.distinct = extension_distinct_map(),
      value: s => s.distinct.count() + (s.valid === s.count ? 0 : 1),
      add: (s, v) => s.distinct.increment(v),
      rem: (s, v) => s.distinct.decrement(v)
    }),
    param: [1]
  },

  /** @type {AggregateDef} */
  array_agg_distinct: {
    create: () => extension_initOp({
      value: s => s.distinct.values()
    }),
    param: [1],
    req: ['distinct']
  },

  /** @type {AggregateDef} */
  mode: {
    create: () => extension_initOp({
      value: s => {
        let mode = extension_util_null;
        let max = 0;
        s.distinct.forEach((value, count) => {
          if (count > max) {
            max = count;
            mode = value;
          }
        });
        return mode;
      }
    }),
    param: [1],
    req: ['distinct']
  },

  /** @type {AggregateDef} */
  sum: {
    create: () => ({
      init:  s => s.sum = 0,
      value: s => s.valid ? s.sum : extension_util_null,
      add: (s, v) => extension_is_bigint(v)
        ? (s.sum === 0 ? s.sum = v : s.sum += v)
        : s.sum += +v,
      rem: (s, v) => s.sum -= v
    }),
    param: [1]
  },

  /** @type {AggregateDef} */
  product: {
    create: () => ({
      init:  s => extension_initProduct(s, 1),
      value: s => s.valid
        ? (
            s.product_v
              ? extension_initProduct(s, extension_product(s.list.values()))
              : s.product
          )
        : undefined,
      add: (s, v) => extension_is_bigint(v)
        ? (s.product === 1 ? s.product = v : s.product *= v)
        : s.product *= v,
      rem: (s, v) => (v == 0 || v === Infinity || v === -Infinity)
        ? s.product_v = true
        : s.product /= v
    }),
    param: [1],
    stream: ['array_agg']
  },

  /** @type {AggregateDef} */
  mean: {
    create: () => ({
      init: s => s.mean = 0,
      value: s => s.valid ? s.mean : extension_util_null,
      add: (s, v) => {
        s.mean_d = v - s.mean;
        s.mean += s.mean_d / s.valid;
      },
      rem: (s, v) => {
        s.mean_d = v - s.mean;
        s.mean -= s.valid ? s.mean_d / s.valid : s.mean;
      }
    }),
    param: [1]
  },

  /** @type {AggregateDef} */
  average: {
    create: () => extension_initOp({
      value: s => s.valid ? s.mean : extension_util_null
    }),
    param: [1],
    req: ['mean']
  },

  /** @type {AggregateDef} */
  variance: {
    create: () => ({
      init:  s => s.dev = 0,
      value: s => s.valid > 1 ? s.dev / (s.valid - 1) : extension_util_null,
      add: (s, v) => s.dev += s.mean_d * (v - s.mean),
      rem: (s, v) => s.dev -= s.mean_d * (v - s.mean)
    }),
    param: [1],
    req: ['mean']
  },

  /** @type {AggregateDef} */
  variancep: {
    create: () => extension_initOp({
      value: s => s.valid > 1 ? s.dev / s.valid : extension_util_null
    }),
    param: [1],
    req: ['variance']
  },

  /** @type {AggregateDef} */
  stdev: {
    create: () => extension_initOp({
      value: s => s.valid > 1 ? Math.sqrt(s.dev / (s.valid - 1)) : extension_util_null
    }),
    param: [1],
    req: ['variance']
  },

  /** @type {AggregateDef} */
  stdevp: {
    create: () => extension_initOp({
      value: s => s.valid > 1 ? Math.sqrt(s.dev / s.valid) : extension_util_null
    }),
    param: [1],
    req: ['variance']
  },

  /** @type {AggregateDef} */
  min: {
    create: () => ({
      init:  s => s.min = extension_util_null,
      value: s => s.min = (Number.isNaN(s.min) ? s.list.min() : s.min),
      add: (s, v) => { if (v < s.min || s.min === extension_util_null) s.min = v; },
      rem: (s, v) => { if (v <= s.min) s.min = NaN; }
    }),
    param: [1],
    stream: ['array_agg']
  },

  /** @type {AggregateDef} */
  max: {
    create: () => ({
      init:  s => s.max = extension_util_null,
      value: s => s.max = (Number.isNaN(s.max) ? s.list.max() : s.max),
      add: (s, v) => { if (v > s.max || s.max === extension_util_null) s.max = v; },
      rem: (s, v) => { if (v >= s.max) s.max = NaN; }
    }),
    param: [1],
    stream: ['array_agg']
  },

  /** @type {AggregateDef} */
  quantile: {
    create: (p) => extension_initOp({
      value: s => s.list.quantile(p)
    }),
    param: [1, 1],
    req: ['array_agg']
  },

  /** @type {AggregateDef} */
  median: {
    create: () => extension_initOp({
      value: s => s.list.quantile(0.5)
    }),
    param: [1],
    req: ['array_agg']
  },

  /** @type {AggregateDef} */
  covariance: {
    create: () => ({
      init:  s => {
        s.cov = s.mean_x = s.mean_y = s.dev_x = s.dev_y = 0;
      },
      value: s => s.valid > 1 ? s.cov / (s.valid - 1) : extension_util_null,
      add: (s, x, y) => {
        const dx = x - s.mean_x;
        const dy = y - s.mean_y;
        s.mean_x += dx / s.valid;
        s.mean_y += dy / s.valid;
        const dy2 = y - s.mean_y;
        s.dev_x += dx * (x - s.mean_x);
        s.dev_y += dy * dy2;
        s.cov += dx * dy2;
      },
      rem: (s, x, y) => {
        const dx = x - s.mean_x;
        const dy = y - s.mean_y;
        s.mean_x -= s.valid ? dx / s.valid : s.mean_x;
        s.mean_y -= s.valid ? dy / s.valid : s.mean_y;
        const dy2 = y - s.mean_y;
        s.dev_x -= dx * (x - s.mean_x);
        s.dev_y -= dy * dy2;
        s.cov -= dx * dy2;
      }
    }),
    param: [2]
  },

  /** @type {AggregateDef} */
  covariancep: {
    create: () => extension_initOp({
      value: s => s.valid > 1 ? s.cov / s.valid : extension_util_null
    }),
    param: [2],
    req: ['covariance']
  },

  /** @type {AggregateDef} */
  corr: {
    create: () => extension_initOp({
      value: s => s.valid > 1
        ? s.cov / (Math.sqrt(s.dev_x) * Math.sqrt(s.dev_y))
        : extension_util_null
    }),
    param: [2],
    req: ['covariance']
  },

  /** @type {AggregateDef} */
  bins: {
    create: (maxbins, nice, minstep, step) => extension_initOp({
      value: s => extension_bins(s.min, s.max, maxbins, nice, minstep, step)
    }),
    param: [1, 4],
    req: ['min', 'max']
  }
});
;// ../../node_modules/arquero/src/op/window-functions.js





/**
 * Initialize a window operator.
 * @callback WindowInit
 * @return {void}
 */

/**
 * Retrieve an output value from a window operator.
 * @callback WindowValue
 * @param {WindowState} state The window state object.
 * @return {*} The output value.
 */

/**
 * An operator instance for a window function.
 * @typedef {object} WindowOperator
 * @property {AggregateInit} init Initialize the operator.
 * @property {AggregateValue} value Retrieve an output value.
 */

/**
 * Create a new window operator instance.
 * @callback WindowCreate
 * @param {...any} params The aggregate operator parameters.
 * @return {WindowOperator} The instantiated window operator.
 */

/**
 * An operator definition for a window function.
 * @typedef {object} WindowDef
 * @property {AggregateCreate} create Create a new operator instance.
 * @property {number[]} param Two-element array containing the
 *  counts of input fields and additional parameters.
 */

const extension_rank = {
  create() {
    let rank;
    return {
      init: () => rank = 1,
      value: w => {
        const i = w.index;
        return (i && !w.peer(i)) ? (rank = i + 1) : rank;
      }
    };
  },
  param: []
};

const extension_cume_dist = {
  create() {
    let cume;
    return {
      init: () => cume = 0,
      value: w => {
        const { index, peer, size } = w;
        let i = index;
        if (cume < i) {
          while (i + 1 < size && peer(i + 1)) ++i;
          cume = i;
        }
        return (1 + cume) / size;
      }
    };
  },
  param: []
};

/**
 * Window operator definitions.
 */
/* harmony default export */ const extension_window_functions = ({
  /** @type {WindowDef} */
  row_number: {
    create() {
      return {
        init: extension_no_op,
        value: w => w.index + 1
      };
    },
    param: []
  },

  /** @type {WindowDef} */
  rank: extension_rank,

  /** @type {WindowDef} */
  avg_rank: {
    create() {
      let j, rank;
      return {
        init: () => (j = -1, rank = 1),
        value: w => {
          const i = w.index;
          if (i >= j) {
            for (rank = j = i + 1; w.peer(j); rank += ++j);
            rank /= (j - i);
          }
          return rank;
        }
      };
    },
    param: []
  },

  /** @type {WindowDef} */
  dense_rank: {
    create() {
      let drank;
      return {
        init: () => drank = 1,
        value: w => {
          const i = w.index;
          return (i && !w.peer(i)) ? ++drank : drank;
        }
      };
    },
    param: []
  },

  /** @type {WindowDef} */
  percent_rank: {
    create() {
      const { init, value } = extension_rank.create();
      return {
        init,
        value: w => (value(w) - 1) / (w.size - 1)
      };
    },
    param: []
  },

  /** @type {WindowDef} */
  cume_dist: extension_cume_dist,

  /** @type {WindowDef} */
  ntile: {
    create(num) {
      num = +num;
      if (!(num > 0)) extension_util_error('ntile num must be greater than zero.');
      const { init, value } = extension_cume_dist.create();
      return {
        init,
        value: w => Math.ceil(num * value(w))
      };
    },
    param: [0, 1]
  },

  /** @type {WindowDef} */
  lag: {
    create(offset, defaultValue = extension_util_null) {
      offset = +offset || 1;
      return {
        init: extension_no_op,
        value: (w, f) => {
          const i = w.index - offset;
          return i >= 0 ? w.value(i, f) : defaultValue;
        }
      };
    },
    param: [1, 2]
  },

  /** @type {WindowDef} */
  lead: {
    create(offset, defaultValue = extension_util_null) {
      offset = +offset || 1;
      return {
        init: extension_no_op,
        value: (w, f) => {
          const i = w.index + offset;
          return i < w.size ? w.value(i, f) : defaultValue;
        }
      };
    },
    param: [1, 2]
  },

  /** @type {WindowDef} */
  first_value: {
    create() {
      return {
        init: extension_no_op,
        value: (w, f) => w.value(w.i0, f)
      };
    },
    param: [1]
  },

  /** @type {WindowDef} */
  last_value: {
    create() {
      return {
        init: extension_no_op,
        value: (w, f) => w.value(w.i1 - 1, f)
      };
    },
    param: [1]
  },

  /** @type {WindowDef} */
  nth_value: {
    create(nth) {
      nth = +nth;
      if (!(nth > 0)) extension_util_error('nth_value nth must be greater than zero.');
      return {
        init: extension_no_op,
        value: (w, f) => {
          const i = w.i0 + (nth - 1);
          return i < w.i1 ? w.value(i, f) : extension_util_null;
        }
      };
    },
    param: [1, 1]
  },

  /** @type {WindowDef} */
  fill_down: {
    create(defaultValue = extension_util_null) {
      let value;
      return {
        init: () => value = defaultValue,
        value: (w, f) => {
          const v = w.value(w.index, f);
          return extension_is_valid(v) ? (value = v) : value;
        }
      };
    },
    param: [1, 1]
  },

  /** @type {WindowDef} */
  fill_up: {
    create(defaultValue = extension_util_null) {
      let value, idx;
      return {
        init: () => (value = defaultValue, idx = -1),
        value: (w, f) => w.index <= idx ? value
          : (idx = extension_find(w, f, w.index)) >= 0 ? (value = w.value(idx, f))
          : (idx = w.size, value = defaultValue)
      };
    },
    param: [1, 1]
  }
});

function extension_find(w, f, i) {
  for (const n = w.size; i < n; ++i) {
    if (extension_is_valid(w.value(i, f))) return i;
  }
  return -1;
}

;// ../../node_modules/arquero/src/op/index.js







/**
 * Check if an aggregate function with the given name exists.
 * @param {string} name The name of the aggregate function.
 * @return {boolean} True if found, false otherwise.
 */
function extension_hasAggregate(name) {
  return extension_util_has(extension_aggregate_functions, name);
}

/**
 * Check if a window function with the given name exists.
 * @param {string} name The name of the window function.
 * @return {boolean} True if found, false otherwise.
 */
function extension_hasWindow(name) {
  return extension_util_has(extension_window_functions, name);
}

/**
 * Check if an expression function with the given name exists.
 * @param {string} name The name of the function.
 * @return {boolean} True if found, false otherwise.
 */
 function extension_hasFunction(name) {
  return extension_util_has(extension_op_functions, name) || name === 'row_object';
}

/**
 * Get an aggregate function definition.
 * @param {string} name The name of the aggregate function.
 * @return {AggregateDef} The aggregate function definition,
 *  or undefined if not found.
 */
function extension_getAggregate(name) {
  return extension_hasAggregate(name) && extension_aggregate_functions[name];
}

/**
 * Get a window function definition.
 * @param {string} name The name of the window function.
 * @return {WindowDef} The window function definition,
 *  or undefined if not found.
 */
function extension_getWindow(name) {
  return extension_hasWindow(name) && extension_window_functions[name];
}

/**
 * Get an expression function definition.
 * @param {string} name The name of the function.
 * @return {Function} The function instance, or undefined if not found.
 */
function extension_getFunction(name) {
  return extension_hasFunction(name) && functions[name];
}
;// ../../node_modules/arquero/src/expression/compile.js


function extension_compile(code, fn, params) {
  code = `"use strict"; return ${code};`;
  return (Function('fn', '$', code))(fn, params);
}

/* harmony default export */ const extension_expression_compile = ({
  escape: (code, func, params) => extension_compile(code, func, params),
  expr:   (code, params) => extension_compile(`(row,data,op)=>${code}`, extension_op_functions, params),
  expr2:  (code, params) => extension_compile(`(row0,data0,row,data)=>${code}`, extension_op_functions, params),
  join:   (code, params) => extension_compile(`(row1,data1,row2,data2)=>${code}`, extension_op_functions, params),
  param:  (code, params) => extension_compile(code, extension_op_functions, params)
});
;// ../../node_modules/arquero/src/expression/rewrite.js



const extension_dictOps = {
  '==': 1,
  '!=': 1,
  '===': 1,
  '!==': 1
};

/**
 * Rewrite AST node to be a table column reference.
 * Additionally optimizes dictionary column operations.
 * @param {object} ref AST node to rewrite to a column reference.
 * @param {string} name The name of the column.
 * @param {number} index The table index of the column.
 * @param {object} col The actual table column instance.
 * @param {object} op Parent AST node operating on the column reference.
 */
/* harmony default export */ function extension_rewrite(ref, name, index = 0, col, op) {
  ref.type = extension_constants_Column;
  ref.name = name;
  ref.table = index;

  // proceed only if has parent op and is a dictionary column
  if (op && col && extension_util_is_function(col.keyFor)) {
    // get other arg if op is an optimizeable operation
    const lit = extension_dictOps[op.operator]
      ? op.left === ref ? op.right : op.left
      : op.callee && op.callee.name === 'equal'
      ? op.arguments[op.arguments[0] === ref ? 1 : 0]
      : null;

    // rewrite as dictionary lookup if other arg is a literal
    if (lit && lit.type === extension_Literal) {
      extension_rewriteDictionary(op, ref, lit, col.keyFor(lit.value));
    }
  }

  return ref;
}

function extension_rewriteDictionary(op, ref, lit, key) {
  if (key < 0) {
    // value not in dictionary, rewrite op as false literal
    op.type = extension_Literal;
    op.value = false;
    op.raw = 'false';
  } else {
    // rewrite ref as dict key access
    ref.type = extension_Dictionary;

    // rewrite literal as target dict key
    lit.value = key;
    lit.raw = key + '';
  }

  return true;
}
;// ../../node_modules/arquero/src/util/entries.js



/* harmony default export */ function extension_entries(value) {
  return extension_is_array(value) ? value
    : extension_is_map(value) ? value.entries()
    : value ? Object.entries(value)
    : [];
}
;// ../../node_modules/arquero/src/expression/row-object.js








const extension_row_object_ROW_OBJECT = 'row_object';

function extension_rowObjectExpression(node, props) {
  node.type = extension_ObjectExpression;

  const p = node.properties = [];
  for (const prop of extension_entries(props)) {
    const [name, key] = extension_is_array(prop) ? prop : [prop, prop];
    p.push({
      type: extension_Property,
      key: { type: extension_Literal, raw: extension_to_string(key) },
      value: extension_rewrite({ computed: true }, name)
    });
  }

  return node;
}

function extension_rowObjectCode(props) {
  return extension_codegen(extension_rowObjectExpression({}, props));
}

function extension_rowObjectBuilder(props) {
  return extension_expression_compile.expr(extension_rowObjectCode(props));
}
;// ../../node_modules/flatbuffers/js/flatbuffers.mjs
/// @file
/// @addtogroup flatbuffers_javascript_api
/// @{
/// @cond FLATBUFFERS_INTERNAL

/**
 * @fileoverview
 *
 * Need to suppress 'global this' error so the Node.js export line doesn't cause
 * closure compile to error out.
 * @suppress {globalThis}
 */

/**
 * @const
 * @namespace
 */
var extension_flatbuffers = {};

/**
 * @typedef {number}
 */
extension_flatbuffers.Offset;

/**
 * @typedef {{
 *   bb: flatbuffers.ByteBuffer,
 *   bb_pos: number
 * }}
 */
extension_flatbuffers.Table;

/**
 * @type {number}
 * @const
 */
extension_flatbuffers.SIZEOF_SHORT = 2;

/**
 * @type {number}
 * @const
 */
extension_flatbuffers.SIZEOF_INT = 4;

/**
 * @type {number}
 * @const
 */
extension_flatbuffers.FILE_IDENTIFIER_LENGTH = 4;

/**
 * @enum {number}
 */
extension_flatbuffers.Encoding = {
  UTF8_BYTES: 1,
  UTF16_STRING: 2
};

/**
 * @type {Int32Array}
 * @const
 */
extension_flatbuffers.int32 = new Int32Array(2);

/**
 * @type {Float32Array}
 * @const
 */
extension_flatbuffers.float32 = new Float32Array(extension_flatbuffers.int32.buffer);

/**
 * @type {Float64Array}
 * @const
 */
extension_flatbuffers.float64 = new Float64Array(extension_flatbuffers.int32.buffer);

/**
 * @type {boolean}
 * @const
 */
extension_flatbuffers.isLittleEndian = new Uint16Array(new Uint8Array([1, 0]).buffer)[0] === 1;

////////////////////////////////////////////////////////////////////////////////

/**
 * @constructor
 * @param {number} low
 * @param {number} high
 */
extension_flatbuffers.Long = function(low, high) {
  /**
   * @type {number}
   * @const
   */
  this.low = low | 0;

  /**
   * @type {number}
   * @const
   */
  this.high = high | 0;
};

/**
 * @param {number} low
 * @param {number} high
 * @returns {flatbuffers.Long}
 */
extension_flatbuffers.Long.create = function(low, high) {
  // Special-case zero to avoid GC overhead for default values
  return low == 0 && high == 0 ? extension_flatbuffers.Long.ZERO : new extension_flatbuffers.Long(low, high);
};

/**
 * @returns {number}
 */
extension_flatbuffers.Long.prototype.toFloat64 = function() {
  return (this.low >>> 0) + this.high * 0x100000000;
};

/**
 * @param {flatbuffers.Long} other
 * @returns {boolean}
 */
extension_flatbuffers.Long.prototype.equals = function(other) {
  return this.low == other.low && this.high == other.high;
};

/**
 * @type {flatbuffers.Long}
 * @const
 */
extension_flatbuffers.Long.ZERO = new extension_flatbuffers.Long(0, 0);

/// @endcond
////////////////////////////////////////////////////////////////////////////////
/**
 * Create a FlatBufferBuilder.
 *
 * @constructor
 * @param {number=} opt_initial_size
 */
extension_flatbuffers.Builder = function(opt_initial_size) {
  if (!opt_initial_size) {
    var initial_size = 1024;
  } else {
    var initial_size = opt_initial_size;
  }

  /**
   * @type {flatbuffers.ByteBuffer}
   * @private
   */
  this.bb = extension_flatbuffers.ByteBuffer.allocate(initial_size);

  /**
   * Remaining space in the ByteBuffer.
   *
   * @type {number}
   * @private
   */
  this.space = initial_size;

  /**
   * Minimum alignment encountered so far.
   *
   * @type {number}
   * @private
   */
  this.minalign = 1;

  /**
   * The vtable for the current table.
   *
   * @type {Array.<number>}
   * @private
   */
  this.vtable = null;

  /**
   * The amount of fields we're actually using.
   *
   * @type {number}
   * @private
   */
  this.vtable_in_use = 0;

  /**
   * Whether we are currently serializing a table.
   *
   * @type {boolean}
   * @private
   */
  this.isNested = false;

  /**
   * Starting offset of the current struct/table.
   *
   * @type {number}
   * @private
   */
  this.object_start = 0;

  /**
   * List of offsets of all vtables.
   *
   * @type {Array.<number>}
   * @private
   */
  this.vtables = [];

  /**
   * For the current vector being built.
   *
   * @type {number}
   * @private
   */
  this.vector_num_elems = 0;

  /**
   * False omits default values from the serialized data
   *
   * @type {boolean}
   * @private
   */
  this.force_defaults = false;
};

extension_flatbuffers.Builder.prototype.clear = function() {
  this.bb.clear();
  this.space = this.bb.capacity();
  this.minalign = 1;
  this.vtable = null;
  this.vtable_in_use = 0;
  this.isNested = false;
  this.object_start = 0;
  this.vtables = [];
  this.vector_num_elems = 0;
  this.force_defaults = false;
};

/**
 * In order to save space, fields that are set to their default value
 * don't get serialized into the buffer. Forcing defaults provides a
 * way to manually disable this optimization.
 *
 * @param {boolean} forceDefaults true always serializes default values
 */
extension_flatbuffers.Builder.prototype.forceDefaults = function(forceDefaults) {
  this.force_defaults = forceDefaults;
};

/**
 * Get the ByteBuffer representing the FlatBuffer. Only call this after you've
 * called finish(). The actual data starts at the ByteBuffer's current position,
 * not necessarily at 0.
 *
 * @returns {flatbuffers.ByteBuffer}
 */
extension_flatbuffers.Builder.prototype.dataBuffer = function() {
  return this.bb;
};

/**
 * Get the bytes representing the FlatBuffer. Only call this after you've
 * called finish().
 *
 * @returns {Uint8Array}
 */
extension_flatbuffers.Builder.prototype.asUint8Array = function() {
  return this.bb.bytes().subarray(this.bb.position(), this.bb.position() + this.offset());
};

/// @cond FLATBUFFERS_INTERNAL
/**
 * Prepare to write an element of `size` after `additional_bytes` have been
 * written, e.g. if you write a string, you need to align such the int length
 * field is aligned to 4 bytes, and the string data follows it directly. If all
 * you need to do is alignment, `additional_bytes` will be 0.
 *
 * @param {number} size This is the of the new element to write
 * @param {number} additional_bytes The padding size
 */
extension_flatbuffers.Builder.prototype.prep = function(size, additional_bytes) {
  // Track the biggest thing we've ever aligned to.
  if (size > this.minalign) {
    this.minalign = size;
  }

  // Find the amount of alignment needed such that `size` is properly
  // aligned after `additional_bytes`
  var align_size = ((~(this.bb.capacity() - this.space + additional_bytes)) + 1) & (size - 1);

  // Reallocate the buffer if needed.
  while (this.space < align_size + size + additional_bytes) {
    var old_buf_size = this.bb.capacity();
    this.bb = extension_flatbuffers.Builder.growByteBuffer(this.bb);
    this.space += this.bb.capacity() - old_buf_size;
  }

  this.pad(align_size);
};

/**
 * @param {number} byte_size
 */
extension_flatbuffers.Builder.prototype.pad = function(byte_size) {
  for (var i = 0; i < byte_size; i++) {
    this.bb.writeInt8(--this.space, 0);
  }
};

/**
 * @param {number} value
 */
extension_flatbuffers.Builder.prototype.writeInt8 = function(value) {
  this.bb.writeInt8(this.space -= 1, value);
};

/**
 * @param {number} value
 */
extension_flatbuffers.Builder.prototype.writeInt16 = function(value) {
  this.bb.writeInt16(this.space -= 2, value);
};

/**
 * @param {number} value
 */
extension_flatbuffers.Builder.prototype.writeInt32 = function(value) {
  this.bb.writeInt32(this.space -= 4, value);
};

/**
 * @param {flatbuffers.Long} value
 */
extension_flatbuffers.Builder.prototype.writeInt64 = function(value) {
  this.bb.writeInt64(this.space -= 8, value);
};

/**
 * @param {number} value
 */
extension_flatbuffers.Builder.prototype.writeFloat32 = function(value) {
  this.bb.writeFloat32(this.space -= 4, value);
};

/**
 * @param {number} value
 */
extension_flatbuffers.Builder.prototype.writeFloat64 = function(value) {
  this.bb.writeFloat64(this.space -= 8, value);
};
/// @endcond

/**
 * Add an `int8` to the buffer, properly aligned, and grows the buffer (if necessary).
 * @param {number} value The `int8` to add the the buffer.
 */
extension_flatbuffers.Builder.prototype.addInt8 = function(value) {
  this.prep(1, 0);
  this.writeInt8(value);
};

/**
 * Add an `int16` to the buffer, properly aligned, and grows the buffer (if necessary).
 * @param {number} value The `int16` to add the the buffer.
 */
extension_flatbuffers.Builder.prototype.addInt16 = function(value) {
  this.prep(2, 0);
  this.writeInt16(value);
};

/**
 * Add an `int32` to the buffer, properly aligned, and grows the buffer (if necessary).
 * @param {number} value The `int32` to add the the buffer.
 */
extension_flatbuffers.Builder.prototype.addInt32 = function(value) {
  this.prep(4, 0);
  this.writeInt32(value);
};

/**
 * Add an `int64` to the buffer, properly aligned, and grows the buffer (if necessary).
 * @param {flatbuffers.Long} value The `int64` to add the the buffer.
 */
extension_flatbuffers.Builder.prototype.addInt64 = function(value) {
  this.prep(8, 0);
  this.writeInt64(value);
};

/**
 * Add a `float32` to the buffer, properly aligned, and grows the buffer (if necessary).
 * @param {number} value The `float32` to add the the buffer.
 */
extension_flatbuffers.Builder.prototype.addFloat32 = function(value) {
  this.prep(4, 0);
  this.writeFloat32(value);
};

/**
 * Add a `float64` to the buffer, properly aligned, and grows the buffer (if necessary).
 * @param {number} value The `float64` to add the the buffer.
 */
extension_flatbuffers.Builder.prototype.addFloat64 = function(value) {
  this.prep(8, 0);
  this.writeFloat64(value);
};

/// @cond FLATBUFFERS_INTERNAL
/**
 * @param {number} voffset
 * @param {number} value
 * @param {number} defaultValue
 */
extension_flatbuffers.Builder.prototype.addFieldInt8 = function(voffset, value, defaultValue) {
  if (this.force_defaults || value != defaultValue) {
    this.addInt8(value);
    this.slot(voffset);
  }
};

/**
 * @param {number} voffset
 * @param {number} value
 * @param {number} defaultValue
 */
extension_flatbuffers.Builder.prototype.addFieldInt16 = function(voffset, value, defaultValue) {
  if (this.force_defaults || value != defaultValue) {
    this.addInt16(value);
    this.slot(voffset);
  }
};

/**
 * @param {number} voffset
 * @param {number} value
 * @param {number} defaultValue
 */
extension_flatbuffers.Builder.prototype.addFieldInt32 = function(voffset, value, defaultValue) {
  if (this.force_defaults || value != defaultValue) {
    this.addInt32(value);
    this.slot(voffset);
  }
};

/**
 * @param {number} voffset
 * @param {flatbuffers.Long} value
 * @param {flatbuffers.Long} defaultValue
 */
extension_flatbuffers.Builder.prototype.addFieldInt64 = function(voffset, value, defaultValue) {
  if (this.force_defaults || !value.equals(defaultValue)) {
    this.addInt64(value);
    this.slot(voffset);
  }
};

/**
 * @param {number} voffset
 * @param {number} value
 * @param {number} defaultValue
 */
extension_flatbuffers.Builder.prototype.addFieldFloat32 = function(voffset, value, defaultValue) {
  if (this.force_defaults || value != defaultValue) {
    this.addFloat32(value);
    this.slot(voffset);
  }
};

/**
 * @param {number} voffset
 * @param {number} value
 * @param {number} defaultValue
 */
extension_flatbuffers.Builder.prototype.addFieldFloat64 = function(voffset, value, defaultValue) {
  if (this.force_defaults || value != defaultValue) {
    this.addFloat64(value);
    this.slot(voffset);
  }
};

/**
 * @param {number} voffset
 * @param {flatbuffers.Offset} value
 * @param {flatbuffers.Offset} defaultValue
 */
extension_flatbuffers.Builder.prototype.addFieldOffset = function(voffset, value, defaultValue) {
  if (this.force_defaults || value != defaultValue) {
    this.addOffset(value);
    this.slot(voffset);
  }
};

/**
 * Structs are stored inline, so nothing additional is being added. `d` is always 0.
 *
 * @param {number} voffset
 * @param {flatbuffers.Offset} value
 * @param {flatbuffers.Offset} defaultValue
 */
extension_flatbuffers.Builder.prototype.addFieldStruct = function(voffset, value, defaultValue) {
  if (value != defaultValue) {
    this.nested(value);
    this.slot(voffset);
  }
};

/**
 * Structures are always stored inline, they need to be created right
 * where they're used.  You'll get this assertion failure if you
 * created it elsewhere.
 *
 * @param {flatbuffers.Offset} obj The offset of the created object
 */
extension_flatbuffers.Builder.prototype.nested = function(obj) {
  if (obj != this.offset()) {
    throw new Error('FlatBuffers: struct must be serialized inline.');
  }
};

/**
 * Should not be creating any other object, string or vector
 * while an object is being constructed
 */
extension_flatbuffers.Builder.prototype.notNested = function() {
  if (this.isNested) {
    throw new Error('FlatBuffers: object serialization must not be nested.');
  }
};

/**
 * Set the current vtable at `voffset` to the current location in the buffer.
 *
 * @param {number} voffset
 */
extension_flatbuffers.Builder.prototype.slot = function(voffset) {
  this.vtable[voffset] = this.offset();
};

/**
 * @returns {flatbuffers.Offset} Offset relative to the end of the buffer.
 */
extension_flatbuffers.Builder.prototype.offset = function() {
  return this.bb.capacity() - this.space;
};

/**
 * Doubles the size of the backing ByteBuffer and copies the old data towards
 * the end of the new buffer (since we build the buffer backwards).
 *
 * @param {flatbuffers.ByteBuffer} bb The current buffer with the existing data
 * @returns {flatbuffers.ByteBuffer} A new byte buffer with the old data copied
 * to it. The data is located at the end of the buffer.
 *
 * uint8Array.set() formally takes {Array<number>|ArrayBufferView}, so to pass
 * it a uint8Array we need to suppress the type check:
 * @suppress {checkTypes}
 */
extension_flatbuffers.Builder.growByteBuffer = function(bb) {
  var old_buf_size = bb.capacity();

  // Ensure we don't grow beyond what fits in an int.
  if (old_buf_size & 0xC0000000) {
    throw new Error('FlatBuffers: cannot grow buffer beyond 2 gigabytes.');
  }

  var new_buf_size = old_buf_size << 1;
  var nbb = extension_flatbuffers.ByteBuffer.allocate(new_buf_size);
  nbb.setPosition(new_buf_size - old_buf_size);
  nbb.bytes().set(bb.bytes(), new_buf_size - old_buf_size);
  return nbb;
};
/// @endcond

/**
 * Adds on offset, relative to where it will be written.
 *
 * @param {flatbuffers.Offset} offset The offset to add.
 */
extension_flatbuffers.Builder.prototype.addOffset = function(offset) {
  this.prep(extension_flatbuffers.SIZEOF_INT, 0); // Ensure alignment is already done.
  this.writeInt32(this.offset() - offset + extension_flatbuffers.SIZEOF_INT);
};

/// @cond FLATBUFFERS_INTERNAL
/**
 * Start encoding a new object in the buffer.  Users will not usually need to
 * call this directly. The FlatBuffers compiler will generate helper methods
 * that call this method internally.
 *
 * @param {number} numfields
 */
extension_flatbuffers.Builder.prototype.startObject = function(numfields) {
  this.notNested();
  if (this.vtable == null) {
    this.vtable = [];
  }
  this.vtable_in_use = numfields;
  for (var i = 0; i < numfields; i++) {
    this.vtable[i] = 0; // This will push additional elements as needed
  }
  this.isNested = true;
  this.object_start = this.offset();
};

/**
 * Finish off writing the object that is under construction.
 *
 * @returns {flatbuffers.Offset} The offset to the object inside `dataBuffer`
 */
extension_flatbuffers.Builder.prototype.endObject = function() {
  if (this.vtable == null || !this.isNested) {
    throw new Error('FlatBuffers: endObject called without startObject');
  }

  this.addInt32(0);
  var vtableloc = this.offset();

  // Trim trailing zeroes.
  var i = this.vtable_in_use - 1;
  for (; i >= 0 && this.vtable[i] == 0; i--) {}
  var trimmed_size = i + 1;

  // Write out the current vtable.
  for (; i >= 0; i--) {
    // Offset relative to the start of the table.
    this.addInt16(this.vtable[i] != 0 ? vtableloc - this.vtable[i] : 0);
  }

  var standard_fields = 2; // The fields below:
  this.addInt16(vtableloc - this.object_start);
  var len = (trimmed_size + standard_fields) * extension_flatbuffers.SIZEOF_SHORT;
  this.addInt16(len);

  // Search for an existing vtable that matches the current one.
  var existing_vtable = 0;
  var vt1 = this.space;
outer_loop:
  for (i = 0; i < this.vtables.length; i++) {
    var vt2 = this.bb.capacity() - this.vtables[i];
    if (len == this.bb.readInt16(vt2)) {
      for (var j = extension_flatbuffers.SIZEOF_SHORT; j < len; j += extension_flatbuffers.SIZEOF_SHORT) {
        if (this.bb.readInt16(vt1 + j) != this.bb.readInt16(vt2 + j)) {
          continue outer_loop;
        }
      }
      existing_vtable = this.vtables[i];
      break;
    }
  }

  if (existing_vtable) {
    // Found a match:
    // Remove the current vtable.
    this.space = this.bb.capacity() - vtableloc;

    // Point table to existing vtable.
    this.bb.writeInt32(this.space, existing_vtable - vtableloc);
  } else {
    // No match:
    // Add the location of the current vtable to the list of vtables.
    this.vtables.push(this.offset());

    // Point table to current vtable.
    this.bb.writeInt32(this.bb.capacity() - vtableloc, this.offset() - vtableloc);
  }

  this.isNested = false;
  return vtableloc;
};
/// @endcond

/**
 * Finalize a buffer, poiting to the given `root_table`.
 *
 * @param {flatbuffers.Offset} root_table
 * @param {string=} opt_file_identifier
 */
extension_flatbuffers.Builder.prototype.finish = function(root_table, opt_file_identifier) {
  if (opt_file_identifier) {
    var file_identifier = opt_file_identifier;
    this.prep(this.minalign, extension_flatbuffers.SIZEOF_INT +
      extension_flatbuffers.FILE_IDENTIFIER_LENGTH);
    if (file_identifier.length != extension_flatbuffers.FILE_IDENTIFIER_LENGTH) {
      throw new Error('FlatBuffers: file identifier must be length ' +
        extension_flatbuffers.FILE_IDENTIFIER_LENGTH);
    }
    for (var i = extension_flatbuffers.FILE_IDENTIFIER_LENGTH - 1; i >= 0; i--) {
      this.writeInt8(file_identifier.charCodeAt(i));
    }
  }
  this.prep(this.minalign, extension_flatbuffers.SIZEOF_INT);
  this.addOffset(root_table);
  this.bb.setPosition(this.space);
};

/// @cond FLATBUFFERS_INTERNAL
/**
 * This checks a required field has been set in a given table that has
 * just been constructed.
 *
 * @param {flatbuffers.Offset} table
 * @param {number} field
 */
extension_flatbuffers.Builder.prototype.requiredField = function(table, field) {
  var table_start = this.bb.capacity() - table;
  var vtable_start = table_start - this.bb.readInt32(table_start);
  var ok = this.bb.readInt16(vtable_start + field) != 0;

  // If this fails, the caller will show what field needs to be set.
  if (!ok) {
    throw new Error('FlatBuffers: field ' + field + ' must be set');
  }
};

/**
 * Start a new array/vector of objects.  Users usually will not call
 * this directly. The FlatBuffers compiler will create a start/end
 * method for vector types in generated code.
 *
 * @param {number} elem_size The size of each element in the array
 * @param {number} num_elems The number of elements in the array
 * @param {number} alignment The alignment of the array
 */
extension_flatbuffers.Builder.prototype.startVector = function(elem_size, num_elems, alignment) {
  this.notNested();
  this.vector_num_elems = num_elems;
  this.prep(extension_flatbuffers.SIZEOF_INT, elem_size * num_elems);
  this.prep(alignment, elem_size * num_elems); // Just in case alignment > int.
};

/**
 * Finish off the creation of an array and all its elements. The array must be
 * created with `startVector`.
 *
 * @returns {flatbuffers.Offset} The offset at which the newly created array
 * starts.
 */
extension_flatbuffers.Builder.prototype.endVector = function() {
  this.writeInt32(this.vector_num_elems);
  return this.offset();
};
/// @endcond

/**
 * Encode the string `s` in the buffer using UTF-8. If a Uint8Array is passed
 * instead of a string, it is assumed to contain valid UTF-8 encoded data.
 *
 * @param {string|Uint8Array} s The string to encode
 * @return {flatbuffers.Offset} The offset in the buffer where the encoded string starts
 */
extension_flatbuffers.Builder.prototype.createString = function(s) {
  if (s instanceof Uint8Array) {
    var utf8 = s;
  } else {
    var utf8 = [];
    var i = 0;

    while (i < s.length) {
      var codePoint;

      // Decode UTF-16
      var a = s.charCodeAt(i++);
      if (a < 0xD800 || a >= 0xDC00) {
        codePoint = a;
      } else {
        var b = s.charCodeAt(i++);
        codePoint = (a << 10) + b + (0x10000 - (0xD800 << 10) - 0xDC00);
      }

      // Encode UTF-8
      if (codePoint < 0x80) {
        utf8.push(codePoint);
      } else {
        if (codePoint < 0x800) {
          utf8.push(((codePoint >> 6) & 0x1F) | 0xC0);
        } else {
          if (codePoint < 0x10000) {
            utf8.push(((codePoint >> 12) & 0x0F) | 0xE0);
          } else {
            utf8.push(
              ((codePoint >> 18) & 0x07) | 0xF0,
              ((codePoint >> 12) & 0x3F) | 0x80);
          }
          utf8.push(((codePoint >> 6) & 0x3F) | 0x80);
        }
        utf8.push((codePoint & 0x3F) | 0x80);
      }
    }
  }

  this.addInt8(0);
  this.startVector(1, utf8.length, 1);
  this.bb.setPosition(this.space -= utf8.length);
  for (var i = 0, offset = this.space, bytes = this.bb.bytes(); i < utf8.length; i++) {
    bytes[offset++] = utf8[i];
  }
  return this.endVector();
};

/**
 * A helper function to avoid generated code depending on this file directly.
 *
 * @param {number} low
 * @param {number} high
 * @returns {flatbuffers.Long}
 */
extension_flatbuffers.Builder.prototype.createLong = function(low, high) {
  return extension_flatbuffers.Long.create(low, high);
};
////////////////////////////////////////////////////////////////////////////////
/// @cond FLATBUFFERS_INTERNAL
/**
 * Create a new ByteBuffer with a given array of bytes (`Uint8Array`).
 *
 * @constructor
 * @param {Uint8Array} bytes
 */
extension_flatbuffers.ByteBuffer = function(bytes) {
  /**
   * @type {Uint8Array}
   * @private
   */
  this.bytes_ = bytes;

  /**
   * @type {number}
   * @private
   */
  this.position_ = 0;
};

/**
 * Create and allocate a new ByteBuffer with a given size.
 *
 * @param {number} byte_size
 * @returns {flatbuffers.ByteBuffer}
 */
extension_flatbuffers.ByteBuffer.allocate = function(byte_size) {
  return new extension_flatbuffers.ByteBuffer(new Uint8Array(byte_size));
};

extension_flatbuffers.ByteBuffer.prototype.clear = function() {
  this.position_ = 0;
};

/**
 * Get the underlying `Uint8Array`.
 *
 * @returns {Uint8Array}
 */
extension_flatbuffers.ByteBuffer.prototype.bytes = function() {
  return this.bytes_;
};

/**
 * Get the buffer's position.
 *
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.position = function() {
  return this.position_;
};

/**
 * Set the buffer's position.
 *
 * @param {number} position
 */
extension_flatbuffers.ByteBuffer.prototype.setPosition = function(position) {
  this.position_ = position;
};

/**
 * Get the buffer's capacity.
 *
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.capacity = function() {
  return this.bytes_.length;
};

/**
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.readInt8 = function(offset) {
  return this.readUint8(offset) << 24 >> 24;
};

/**
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.readUint8 = function(offset) {
  return this.bytes_[offset];
};

/**
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.readInt16 = function(offset) {
  return this.readUint16(offset) << 16 >> 16;
};

/**
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.readUint16 = function(offset) {
  return this.bytes_[offset] | this.bytes_[offset + 1] << 8;
};

/**
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.readInt32 = function(offset) {
  return this.bytes_[offset] | this.bytes_[offset + 1] << 8 | this.bytes_[offset + 2] << 16 | this.bytes_[offset + 3] << 24;
};

/**
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.readUint32 = function(offset) {
  return this.readInt32(offset) >>> 0;
};

/**
 * @param {number} offset
 * @returns {flatbuffers.Long}
 */
extension_flatbuffers.ByteBuffer.prototype.readInt64 = function(offset) {
  return new extension_flatbuffers.Long(this.readInt32(offset), this.readInt32(offset + 4));
};

/**
 * @param {number} offset
 * @returns {flatbuffers.Long}
 */
extension_flatbuffers.ByteBuffer.prototype.readUint64 = function(offset) {
  return new extension_flatbuffers.Long(this.readUint32(offset), this.readUint32(offset + 4));
};

/**
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.readFloat32 = function(offset) {
  extension_flatbuffers.int32[0] = this.readInt32(offset);
  return extension_flatbuffers.float32[0];
};

/**
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.readFloat64 = function(offset) {
  extension_flatbuffers.int32[extension_flatbuffers.isLittleEndian ? 0 : 1] = this.readInt32(offset);
  extension_flatbuffers.int32[extension_flatbuffers.isLittleEndian ? 1 : 0] = this.readInt32(offset + 4);
  return extension_flatbuffers.float64[0];
};

/**
 * @param {number} offset
 * @param {number|boolean} value
 */
extension_flatbuffers.ByteBuffer.prototype.writeInt8 = function(offset, value) {
  this.bytes_[offset] = /** @type {number} */(value);
};

/**
 * @param {number} offset
 * @param {number} value
 */
extension_flatbuffers.ByteBuffer.prototype.writeUint8 = function(offset, value) {
  this.bytes_[offset] = value;
};

/**
 * @param {number} offset
 * @param {number} value
 */
extension_flatbuffers.ByteBuffer.prototype.writeInt16 = function(offset, value) {
  this.bytes_[offset] = value;
  this.bytes_[offset + 1] = value >> 8;
};

/**
 * @param {number} offset
 * @param {number} value
 */
extension_flatbuffers.ByteBuffer.prototype.writeUint16 = function(offset, value) {
    this.bytes_[offset] = value;
    this.bytes_[offset + 1] = value >> 8;
};

/**
 * @param {number} offset
 * @param {number} value
 */
extension_flatbuffers.ByteBuffer.prototype.writeInt32 = function(offset, value) {
  this.bytes_[offset] = value;
  this.bytes_[offset + 1] = value >> 8;
  this.bytes_[offset + 2] = value >> 16;
  this.bytes_[offset + 3] = value >> 24;
};

/**
 * @param {number} offset
 * @param {number} value
 */
extension_flatbuffers.ByteBuffer.prototype.writeUint32 = function(offset, value) {
    this.bytes_[offset] = value;
    this.bytes_[offset + 1] = value >> 8;
    this.bytes_[offset + 2] = value >> 16;
    this.bytes_[offset + 3] = value >> 24;
};

/**
 * @param {number} offset
 * @param {flatbuffers.Long} value
 */
extension_flatbuffers.ByteBuffer.prototype.writeInt64 = function(offset, value) {
  this.writeInt32(offset, value.low);
  this.writeInt32(offset + 4, value.high);
};

/**
 * @param {number} offset
 * @param {flatbuffers.Long} value
 */
extension_flatbuffers.ByteBuffer.prototype.writeUint64 = function(offset, value) {
    this.writeUint32(offset, value.low);
    this.writeUint32(offset + 4, value.high);
};

/**
 * @param {number} offset
 * @param {number} value
 */
extension_flatbuffers.ByteBuffer.prototype.writeFloat32 = function(offset, value) {
  extension_flatbuffers.float32[0] = value;
  this.writeInt32(offset, extension_flatbuffers.int32[0]);
};

/**
 * @param {number} offset
 * @param {number} value
 */
extension_flatbuffers.ByteBuffer.prototype.writeFloat64 = function(offset, value) {
  extension_flatbuffers.float64[0] = value;
  this.writeInt32(offset, extension_flatbuffers.int32[extension_flatbuffers.isLittleEndian ? 0 : 1]);
  this.writeInt32(offset + 4, extension_flatbuffers.int32[extension_flatbuffers.isLittleEndian ? 1 : 0]);
};

/**
 * Return the file identifier.   Behavior is undefined for FlatBuffers whose
 * schema does not include a file_identifier (likely points at padding or the
 * start of a the root vtable).
 * @returns {string}
 */
extension_flatbuffers.ByteBuffer.prototype.getBufferIdentifier = function() {
  if (this.bytes_.length < this.position_ + extension_flatbuffers.SIZEOF_INT +
      extension_flatbuffers.FILE_IDENTIFIER_LENGTH) {
    throw new Error(
        'FlatBuffers: ByteBuffer is too short to contain an identifier.');
  }
  var result = "";
  for (var i = 0; i < extension_flatbuffers.FILE_IDENTIFIER_LENGTH; i++) {
    result += String.fromCharCode(
        this.readInt8(this.position_ + extension_flatbuffers.SIZEOF_INT + i));
  }
  return result;
};

/**
 * Look up a field in the vtable, return an offset into the object, or 0 if the
 * field is not present.
 *
 * @param {number} bb_pos
 * @param {number} vtable_offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.__offset = function(bb_pos, vtable_offset) {
  var vtable = bb_pos - this.readInt32(bb_pos);
  return vtable_offset < this.readInt16(vtable) ? this.readInt16(vtable + vtable_offset) : 0;
};

/**
 * Initialize any Table-derived type to point to the union at the given offset.
 *
 * @param {flatbuffers.Table} t
 * @param {number} offset
 * @returns {flatbuffers.Table}
 */
extension_flatbuffers.ByteBuffer.prototype.__union = function(t, offset) {
  t.bb_pos = offset + this.readInt32(offset);
  t.bb = this;
  return t;
};

/**
 * Create a JavaScript string from UTF-8 data stored inside the FlatBuffer.
 * This allocates a new string and converts to wide chars upon each access.
 *
 * To avoid the conversion to UTF-16, pass flatbuffers.Encoding.UTF8_BYTES as
 * the "optionalEncoding" argument. This is useful for avoiding conversion to
 * and from UTF-16 when the data will just be packaged back up in another
 * FlatBuffer later on.
 *
 * @param {number} offset
 * @param {flatbuffers.Encoding=} opt_encoding Defaults to UTF16_STRING
 * @returns {string|Uint8Array}
 */
extension_flatbuffers.ByteBuffer.prototype.__string = function(offset, opt_encoding) {
  offset += this.readInt32(offset);

  var length = this.readInt32(offset);
  var result = '';
  var i = 0;

  offset += extension_flatbuffers.SIZEOF_INT;

  if (opt_encoding === extension_flatbuffers.Encoding.UTF8_BYTES) {
    return this.bytes_.subarray(offset, offset + length);
  }

  while (i < length) {
    var codePoint;

    // Decode UTF-8
    var a = this.readUint8(offset + i++);
    if (a < 0xC0) {
      codePoint = a;
    } else {
      var b = this.readUint8(offset + i++);
      if (a < 0xE0) {
        codePoint =
          ((a & 0x1F) << 6) |
          (b & 0x3F);
      } else {
        var c = this.readUint8(offset + i++);
        if (a < 0xF0) {
          codePoint =
            ((a & 0x0F) << 12) |
            ((b & 0x3F) << 6) |
            (c & 0x3F);
        } else {
          var d = this.readUint8(offset + i++);
          codePoint =
            ((a & 0x07) << 18) |
            ((b & 0x3F) << 12) |
            ((c & 0x3F) << 6) |
            (d & 0x3F);
        }
      }
    }

    // Encode UTF-16
    if (codePoint < 0x10000) {
      result += String.fromCharCode(codePoint);
    } else {
      codePoint -= 0x10000;
      result += String.fromCharCode(
        (codePoint >> 10) + 0xD800,
        (codePoint & ((1 << 10) - 1)) + 0xDC00);
    }
  }

  return result;
};

/**
 * Retrieve the relative offset stored at "offset"
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.__indirect = function(offset) {
  return offset + this.readInt32(offset);
};

/**
 * Get the start of data of a vector whose offset is stored at "offset" in this object.
 *
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.__vector = function(offset) {
  return offset + this.readInt32(offset) + extension_flatbuffers.SIZEOF_INT; // data starts after the length
};

/**
 * Get the length of a vector whose offset is stored at "offset" in this object.
 *
 * @param {number} offset
 * @returns {number}
 */
extension_flatbuffers.ByteBuffer.prototype.__vector_len = function(offset) {
  return this.readInt32(offset + this.readInt32(offset));
};

/**
 * @param {string} ident
 * @returns {boolean}
 */
extension_flatbuffers.ByteBuffer.prototype.__has_identifier = function(ident) {
  if (ident.length != extension_flatbuffers.FILE_IDENTIFIER_LENGTH) {
    throw new Error('FlatBuffers: file identifier must be length ' +
                    extension_flatbuffers.FILE_IDENTIFIER_LENGTH);
  }
  for (var i = 0; i < extension_flatbuffers.FILE_IDENTIFIER_LENGTH; i++) {
    if (ident.charCodeAt(i) != this.readInt8(this.position_ + extension_flatbuffers.SIZEOF_INT + i)) {
      return false;
    }
  }
  return true;
};

/**
 * A helper function to avoid generated code depending on this file directly.
 *
 * @param {number} low
 * @param {number} high
 * @returns {flatbuffers.Long}
 */
extension_flatbuffers.ByteBuffer.prototype.createLong = function(low, high) {
  return extension_flatbuffers.Long.create(low, high);
};

// Exports for Node.js and RequireJS


/// @endcond
/// @}

;// ../../node_modules/text-encoding-utf-8/lib/encoding.lib.mjs


// This is free and unencumbered software released into the public domain.
// See LICENSE.md for more information.

//
// Utilities
//

/**
 * @param {number} a The number to test.
 * @param {number} min The minimum value in the range, inclusive.
 * @param {number} max The maximum value in the range, inclusive.
 * @return {boolean} True if a >= min and a <= max.
 */
function extension_inRange(a, min, max) {
  return min <= a && a <= max;
}

/**
 * @param {*} o
 * @return {Object}
 */
function extension_ToDictionary(o) {
  if (o === undefined) return {};
  if (o === Object(o)) return o;
  throw TypeError('Could not convert argument to dictionary');
}

/**
 * @param {string} string Input string of UTF-16 code units.
 * @return {!Array.<number>} Code points.
 */
function extension_stringToCodePoints(string) {
  // https://heycam.github.io/webidl/#dfn-obtain-unicode

  // 1. Let S be the DOMString value.
  var s = String(string);

  // 2. Let n be the length of S.
  var n = s.length;

  // 3. Initialize i to 0.
  var i = 0;

  // 4. Initialize U to be an empty sequence of Unicode characters.
  var u = [];

  // 5. While i < n:
  while (i < n) {

    // 1. Let c be the code unit in S at index i.
    var c = s.charCodeAt(i);

    // 2. Depending on the value of c:

    // c < 0xD800 or c > 0xDFFF
    if (c < 0xD800 || c > 0xDFFF) {
      // Append to U the Unicode character with code point c.
      u.push(c);
    }

    // 0xDC00 ≤ c ≤ 0xDFFF
    else if (0xDC00 <= c && c <= 0xDFFF) {
      // Append to U a U+FFFD REPLACEMENT CHARACTER.
      u.push(0xFFFD);
    }

    // 0xD800 ≤ c ≤ 0xDBFF
    else if (0xD800 <= c && c <= 0xDBFF) {
      // 1. If i = n−1, then append to U a U+FFFD REPLACEMENT
      // CHARACTER.
      if (i === n - 1) {
        u.push(0xFFFD);
      }
      // 2. Otherwise, i < n−1:
      else {
        // 1. Let d be the code unit in S at index i+1.
        var d = string.charCodeAt(i + 1);

        // 2. If 0xDC00 ≤ d ≤ 0xDFFF, then:
        if (0xDC00 <= d && d <= 0xDFFF) {
          // 1. Let a be c & 0x3FF.
          var a = c & 0x3FF;

          // 2. Let b be d & 0x3FF.
          var b = d & 0x3FF;

          // 3. Append to U the Unicode character with code point
          // 2^16+2^10*a+b.
          u.push(0x10000 + (a << 10) + b);

          // 4. Set i to i+1.
          i += 1;
        }

        // 3. Otherwise, d < 0xDC00 or d > 0xDFFF. Append to U a
        // U+FFFD REPLACEMENT CHARACTER.
        else  {
          u.push(0xFFFD);
        }
      }
    }

    // 3. Set i to i+1.
    i += 1;
  }

  // 6. Return U.
  return u;
}

/**
 * @param {!Array.<number>} code_points Array of code points.
 * @return {string} string String of UTF-16 code units.
 */
function extension_codePointsToString(code_points) {
  var s = '';
  for (var i = 0; i < code_points.length; ++i) {
    var cp = code_points[i];
    if (cp <= 0xFFFF) {
      s += String.fromCharCode(cp);
    } else {
      cp -= 0x10000;
      s += String.fromCharCode((cp >> 10) + 0xD800,
                               (cp & 0x3FF) + 0xDC00);
    }
  }
  return s;
}


//
// Implementation of Encoding specification
// https://encoding.spec.whatwg.org/
//

//
// 3. Terminology
//

/**
 * End-of-stream is a special token that signifies no more tokens
 * are in the stream.
 * @const
 */ var extension_end_of_stream = -1;

/**
 * A stream represents an ordered sequence of tokens.
 *
 * @constructor
 * @param {!(Array.<number>|Uint8Array)} tokens Array of tokens that provide the
 * stream.
 */
function extension_Stream(tokens) {
  /** @type {!Array.<number>} */
  this.tokens = [].slice.call(tokens);
}

extension_Stream.prototype = {
  /**
   * @return {boolean} True if end-of-stream has been hit.
   */
  endOfStream: function() {
    return !this.tokens.length;
  },

  /**
   * When a token is read from a stream, the first token in the
   * stream must be returned and subsequently removed, and
   * end-of-stream must be returned otherwise.
   *
   * @return {number} Get the next token from the stream, or
   * end_of_stream.
   */
   read: function() {
    if (!this.tokens.length)
      return extension_end_of_stream;
     return this.tokens.shift();
   },

  /**
   * When one or more tokens are prepended to a stream, those tokens
   * must be inserted, in given order, before the first token in the
   * stream.
   *
   * @param {(number|!Array.<number>)} token The token(s) to prepend to the stream.
   */
  prepend: function(token) {
    if (Array.isArray(token)) {
      var tokens = /**@type {!Array.<number>}*/(token);
      while (tokens.length)
        this.tokens.unshift(tokens.pop());
    } else {
      this.tokens.unshift(token);
    }
  },

  /**
   * When one or more tokens are pushed to a stream, those tokens
   * must be inserted, in given order, after the last token in the
   * stream.
   *
   * @param {(number|!Array.<number>)} token The tokens(s) to prepend to the stream.
   */
  push: function(token) {
    if (Array.isArray(token)) {
      var tokens = /**@type {!Array.<number>}*/(token);
      while (tokens.length)
        this.tokens.push(tokens.shift());
    } else {
      this.tokens.push(token);
    }
  }
};

//
// 4. Encodings
//

// 4.1 Encoders and decoders

/** @const */
var extension_finished = -1;

/**
 * @param {boolean} fatal If true, decoding errors raise an exception.
 * @param {number=} opt_code_point Override the standard fallback code point.
 * @return {number} The code point to insert on a decoding error.
 */
function extension_decoderError(fatal, opt_code_point) {
  if (fatal)
    throw TypeError('Decoder error');
  return opt_code_point || 0xFFFD;
}

/** @interface */
function extension_Decoder() {}
extension_Decoder.prototype = {
  /**
   * @param {Stream} stream The stream of bytes being decoded.
   * @param {number} bite The next byte read from the stream.
   * @return {?(number|!Array.<number>)} The next code point(s)
   *     decoded, or null if not enough data exists in the input
   *     stream to decode a complete code point, or |finished|.
   */
  handler: function(stream, bite) {}
};

/** @interface */
function extension_Encoder() {}
extension_Encoder.prototype = {
  /**
   * @param {Stream} stream The stream of code points being encoded.
   * @param {number} code_point Next code point read from the stream.
   * @return {(number|!Array.<number>)} Byte(s) to emit, or |finished|.
   */
  handler: function(stream, code_point) {}
};

//
// 7. API
//

/** @const */ var extension_DEFAULT_ENCODING = 'utf-8';

// 7.1 Interface TextDecoder

/**
 * @constructor
 * @param {string=} encoding The label of the encoding;
 *     defaults to 'utf-8'.
 * @param {Object=} options
 */
function extension_encoding_lib_TextDecoder(encoding, options) {
  if (!(this instanceof extension_encoding_lib_TextDecoder)) {
    return new extension_encoding_lib_TextDecoder(encoding, options);
  }
  encoding = encoding !== undefined ? String(encoding).toLowerCase() : extension_DEFAULT_ENCODING;
  if (encoding !== extension_DEFAULT_ENCODING) {
    throw new Error('Encoding not supported. Only utf-8 is supported');
  }
  options = extension_ToDictionary(options);

  /** @private @type {boolean} */
  this._streaming = false;
  /** @private @type {boolean} */
  this._BOMseen = false;
  /** @private @type {?Decoder} */
  this._decoder = null;
  /** @private @type {boolean} */
  this._fatal = Boolean(options['fatal']);
  /** @private @type {boolean} */
  this._ignoreBOM = Boolean(options['ignoreBOM']);

  Object.defineProperty(this, 'encoding', {value: 'utf-8'});
  Object.defineProperty(this, 'fatal', {value: this._fatal});
  Object.defineProperty(this, 'ignoreBOM', {value: this._ignoreBOM});
}

extension_encoding_lib_TextDecoder.prototype = {
  /**
   * @param {ArrayBufferView=} input The buffer of bytes to decode.
   * @param {Object=} options
   * @return {string} The decoded string.
   */
  decode: function decode(input, options) {
    var bytes;
    if (typeof input === 'object' && input instanceof ArrayBuffer) {
      bytes = new Uint8Array(input);
    } else if (typeof input === 'object' && 'buffer' in input &&
               input.buffer instanceof ArrayBuffer) {
      bytes = new Uint8Array(input.buffer,
                             input.byteOffset,
                             input.byteLength);
    } else {
      bytes = new Uint8Array(0);
    }

    options = extension_ToDictionary(options);

    if (!this._streaming) {
      this._decoder = new extension_UTF8Decoder({fatal: this._fatal});
      this._BOMseen = false;
    }
    this._streaming = Boolean(options['stream']);

    var input_stream = new extension_Stream(bytes);

    var code_points = [];

    /** @type {?(number|!Array.<number>)} */
    var result;

    while (!input_stream.endOfStream()) {
      result = this._decoder.handler(input_stream, input_stream.read());
      if (result === extension_finished)
        break;
      if (result === null)
        continue;
      if (Array.isArray(result))
        code_points.push.apply(code_points, /**@type {!Array.<number>}*/(result));
      else
        code_points.push(result);
    }
    if (!this._streaming) {
      do {
        result = this._decoder.handler(input_stream, input_stream.read());
        if (result === extension_finished)
          break;
        if (result === null)
          continue;
        if (Array.isArray(result))
          code_points.push.apply(code_points, /**@type {!Array.<number>}*/(result));
        else
          code_points.push(result);
      } while (!input_stream.endOfStream());
      this._decoder = null;
    }

    if (code_points.length) {
      // If encoding is one of utf-8, utf-16be, and utf-16le, and
      // ignore BOM flag and BOM seen flag are unset, run these
      // subsubsteps:
      if (['utf-8'].indexOf(this.encoding) !== -1 &&
          !this._ignoreBOM && !this._BOMseen) {
        // If token is U+FEFF, set BOM seen flag.
        if (code_points[0] === 0xFEFF) {
          this._BOMseen = true;
          code_points.shift();
        } else {
          // Otherwise, if token is not end-of-stream, set BOM seen
          // flag and append token to output.
          this._BOMseen = true;
        }
      }
    }

    return extension_codePointsToString(code_points);
  }
};

// 7.2 Interface TextEncoder

/**
 * @constructor
 * @param {string=} encoding The label of the encoding;
 *     defaults to 'utf-8'.
 * @param {Object=} options
 */
function extension_encoding_lib_TextEncoder(encoding, options) {
  if (!(this instanceof extension_encoding_lib_TextEncoder))
    return new extension_encoding_lib_TextEncoder(encoding, options);
  encoding = encoding !== undefined ? String(encoding).toLowerCase() : extension_DEFAULT_ENCODING;
  if (encoding !== extension_DEFAULT_ENCODING) {
    throw new Error('Encoding not supported. Only utf-8 is supported');
  }
  options = extension_ToDictionary(options);

  /** @private @type {boolean} */
  this._streaming = false;
  /** @private @type {?Encoder} */
  this._encoder = null;
  /** @private @type {{fatal: boolean}} */
  this._options = {fatal: Boolean(options['fatal'])};

  Object.defineProperty(this, 'encoding', {value: 'utf-8'});
}

extension_encoding_lib_TextEncoder.prototype = {
  /**
   * @param {string=} opt_string The string to encode.
   * @param {Object=} options
   * @return {Uint8Array} Encoded bytes, as a Uint8Array.
   */
  encode: function encode(opt_string, options) {
    opt_string = opt_string ? String(opt_string) : '';
    options = extension_ToDictionary(options);

    // NOTE: This option is nonstandard. None of the encodings
    // permitted for encoding (i.e. UTF-8, UTF-16) are stateful,
    // so streaming is not necessary.
    if (!this._streaming)
      this._encoder = new extension_UTF8Encoder(this._options);
    this._streaming = Boolean(options['stream']);

    var bytes = [];
    var input_stream = new extension_Stream(extension_stringToCodePoints(opt_string));
    /** @type {?(number|!Array.<number>)} */
    var result;
    while (!input_stream.endOfStream()) {
      result = this._encoder.handler(input_stream, input_stream.read());
      if (result === extension_finished)
        break;
      if (Array.isArray(result))
        bytes.push.apply(bytes, /**@type {!Array.<number>}*/(result));
      else
        bytes.push(result);
    }
    if (!this._streaming) {
      while (true) {
        result = this._encoder.handler(input_stream, input_stream.read());
        if (result === extension_finished)
          break;
        if (Array.isArray(result))
          bytes.push.apply(bytes, /**@type {!Array.<number>}*/(result));
        else
          bytes.push(result);
      }
      this._encoder = null;
    }
    return new Uint8Array(bytes);
  }
};

//
// 8. The encoding
//

// 8.1 utf-8

/**
 * @constructor
 * @implements {Decoder}
 * @param {{fatal: boolean}} options
 */
function extension_UTF8Decoder(options) {
  var fatal = options.fatal;

  // utf-8's decoder's has an associated utf-8 code point, utf-8
  // bytes seen, and utf-8 bytes needed (all initially 0), a utf-8
  // lower boundary (initially 0x80), and a utf-8 upper boundary
  // (initially 0xBF).
  var /** @type {number} */ utf8_code_point = 0,
      /** @type {number} */ utf8_bytes_seen = 0,
      /** @type {number} */ utf8_bytes_needed = 0,
      /** @type {number} */ utf8_lower_boundary = 0x80,
      /** @type {number} */ utf8_upper_boundary = 0xBF;

  /**
   * @param {Stream} stream The stream of bytes being decoded.
   * @param {number} bite The next byte read from the stream.
   * @return {?(number|!Array.<number>)} The next code point(s)
   *     decoded, or null if not enough data exists in the input
   *     stream to decode a complete code point.
   */
  this.handler = function(stream, bite) {
    // 1. If byte is end-of-stream and utf-8 bytes needed is not 0,
    // set utf-8 bytes needed to 0 and return error.
    if (bite === extension_end_of_stream && utf8_bytes_needed !== 0) {
      utf8_bytes_needed = 0;
      return extension_decoderError(fatal);
    }

    // 2. If byte is end-of-stream, return finished.
    if (bite === extension_end_of_stream)
      return extension_finished;

    // 3. If utf-8 bytes needed is 0, based on byte:
    if (utf8_bytes_needed === 0) {

      // 0x00 to 0x7F
      if (extension_inRange(bite, 0x00, 0x7F)) {
        // Return a code point whose value is byte.
        return bite;
      }

      // 0xC2 to 0xDF
      if (extension_inRange(bite, 0xC2, 0xDF)) {
        // Set utf-8 bytes needed to 1 and utf-8 code point to byte
        // − 0xC0.
        utf8_bytes_needed = 1;
        utf8_code_point = bite - 0xC0;
      }

      // 0xE0 to 0xEF
      else if (extension_inRange(bite, 0xE0, 0xEF)) {
        // 1. If byte is 0xE0, set utf-8 lower boundary to 0xA0.
        if (bite === 0xE0)
          utf8_lower_boundary = 0xA0;
        // 2. If byte is 0xED, set utf-8 upper boundary to 0x9F.
        if (bite === 0xED)
          utf8_upper_boundary = 0x9F;
        // 3. Set utf-8 bytes needed to 2 and utf-8 code point to
        // byte − 0xE0.
        utf8_bytes_needed = 2;
        utf8_code_point = bite - 0xE0;
      }

      // 0xF0 to 0xF4
      else if (extension_inRange(bite, 0xF0, 0xF4)) {
        // 1. If byte is 0xF0, set utf-8 lower boundary to 0x90.
        if (bite === 0xF0)
          utf8_lower_boundary = 0x90;
        // 2. If byte is 0xF4, set utf-8 upper boundary to 0x8F.
        if (bite === 0xF4)
          utf8_upper_boundary = 0x8F;
        // 3. Set utf-8 bytes needed to 3 and utf-8 code point to
        // byte − 0xF0.
        utf8_bytes_needed = 3;
        utf8_code_point = bite - 0xF0;
      }

      // Otherwise
      else {
        // Return error.
        return extension_decoderError(fatal);
      }

      // Then (byte is in the range 0xC2 to 0xF4) set utf-8 code
      // point to utf-8 code point << (6 × utf-8 bytes needed) and
      // return continue.
      utf8_code_point = utf8_code_point << (6 * utf8_bytes_needed);
      return null;
    }

    // 4. If byte is not in the range utf-8 lower boundary to utf-8
    // upper boundary, run these substeps:
    if (!extension_inRange(bite, utf8_lower_boundary, utf8_upper_boundary)) {

      // 1. Set utf-8 code point, utf-8 bytes needed, and utf-8
      // bytes seen to 0, set utf-8 lower boundary to 0x80, and set
      // utf-8 upper boundary to 0xBF.
      utf8_code_point = utf8_bytes_needed = utf8_bytes_seen = 0;
      utf8_lower_boundary = 0x80;
      utf8_upper_boundary = 0xBF;

      // 2. Prepend byte to stream.
      stream.prepend(bite);

      // 3. Return error.
      return extension_decoderError(fatal);
    }

    // 5. Set utf-8 lower boundary to 0x80 and utf-8 upper boundary
    // to 0xBF.
    utf8_lower_boundary = 0x80;
    utf8_upper_boundary = 0xBF;

    // 6. Increase utf-8 bytes seen by one and set utf-8 code point
    // to utf-8 code point + (byte − 0x80) << (6 × (utf-8 bytes
    // needed − utf-8 bytes seen)).
    utf8_bytes_seen += 1;
    utf8_code_point += (bite - 0x80) << (6 * (utf8_bytes_needed - utf8_bytes_seen));

    // 7. If utf-8 bytes seen is not equal to utf-8 bytes needed,
    // continue.
    if (utf8_bytes_seen !== utf8_bytes_needed)
      return null;

    // 8. Let code point be utf-8 code point.
    var code_point = utf8_code_point;

    // 9. Set utf-8 code point, utf-8 bytes needed, and utf-8 bytes
    // seen to 0.
    utf8_code_point = utf8_bytes_needed = utf8_bytes_seen = 0;

    // 10. Return a code point whose value is code point.
    return code_point;
  };
}

/**
 * @constructor
 * @implements {Encoder}
 * @param {{fatal: boolean}} options
 */
function extension_UTF8Encoder(options) {
  var fatal = options.fatal;
  /**
   * @param {Stream} stream Input stream.
   * @param {number} code_point Next code point read from the stream.
   * @return {(number|!Array.<number>)} Byte(s) to emit.
   */
  this.handler = function(stream, code_point) {
    // 1. If code point is end-of-stream, return finished.
    if (code_point === extension_end_of_stream)
      return extension_finished;

    // 2. If code point is in the range U+0000 to U+007F, return a
    // byte whose value is code point.
    if (extension_inRange(code_point, 0x0000, 0x007f))
      return code_point;

    // 3. Set count and offset based on the range code point is in:
    var count, offset;
    // U+0080 to U+07FF:    1 and 0xC0
    if (extension_inRange(code_point, 0x0080, 0x07FF)) {
      count = 1;
      offset = 0xC0;
    }
    // U+0800 to U+FFFF:    2 and 0xE0
    else if (extension_inRange(code_point, 0x0800, 0xFFFF)) {
      count = 2;
      offset = 0xE0;
    }
    // U+10000 to U+10FFFF: 3 and 0xF0
    else if (extension_inRange(code_point, 0x10000, 0x10FFFF)) {
      count = 3;
      offset = 0xF0;
    }

    // 4.Let bytes be a byte sequence whose first byte is (code
    // point >> (6 × count)) + offset.
    var bytes = [(code_point >> (6 * count)) + offset];

    // 5. Run these substeps while count is greater than 0:
    while (count > 0) {

      // 1. Set temp to code point >> (6 × (count − 1)).
      var temp = code_point >> (6 * (count - 1));

      // 2. Append to bytes 0x80 | (temp & 0x3F).
      bytes.push(0x80 | (temp & 0x3F));

      // 3. Decrease count by one.
      count -= 1;
    }

    // 6. Return bytes bytes, in order.
    return bytes;
  };
}



;// ../../node_modules/apache-arrow/util/utf8.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore @suppress {missingRequire} */
const extension_Buffer = typeof Buffer === 'function' ? Buffer : null;
/** @ignore */
const extension_useNativeEncoders = typeof TextDecoder === 'function' && typeof TextEncoder === 'function';
/** @ignore */
const extension_decodeUtf8 = ((TextDecoder) => {
    if (extension_useNativeEncoders || !extension_Buffer) {
        const decoder = new TextDecoder('utf-8');
        return (buffer) => decoder.decode(buffer);
    }
    return (input) => {
        const { buffer, byteOffset, length } = extension_toUint8Array(input);
        return extension_Buffer.from(buffer, byteOffset, length).toString();
    };
})(typeof TextDecoder !== 'undefined' ? TextDecoder : extension_encoding_lib_TextDecoder);
/** @ignore */
const extension_encodeUtf8 = ((TextEncoder) => {
    if (extension_useNativeEncoders || !extension_Buffer) {
        const encoder = new TextEncoder();
        return (value) => encoder.encode(value);
    }
    return (input = '') => extension_toUint8Array(extension_Buffer.from(input, 'utf8'));
})(typeof TextEncoder !== 'undefined' ? TextEncoder : extension_encoding_lib_TextEncoder);

//# sourceMappingURL=utf8.mjs.map

;// ../../node_modules/apache-arrow/io/interfaces.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
const extension_ITERATOR_DONE = Object.freeze({ done: true, value: void (0) });
/** @ignore */
class extension_ArrowJSON {
    // @ts-ignore
    constructor(_json) {
        this._json = _json;
    }
    get schema() { return this._json['schema']; }
    get batches() { return (this._json['batches'] || []); }
    get dictionaries() { return (this._json['dictionaries'] || []); }
}
/** @ignore */
class extension_ReadableInterop {
    tee() {
        return this._getDOMStream().tee();
    }
    pipe(writable, options) {
        return this._getNodeStream().pipe(writable, options);
    }
    pipeTo(writable, options) { return this._getDOMStream().pipeTo(writable, options); }
    pipeThrough(duplex, options) {
        return this._getDOMStream().pipeThrough(duplex, options);
    }
    _getDOMStream() {
        return this._DOMStream || (this._DOMStream = this.toDOMStream());
    }
    _getNodeStream() {
        return this._nodeStream || (this._nodeStream = this.toNodeStream());
    }
}
/** @ignore */
class extension_AsyncQueue extends extension_ReadableInterop {
    constructor() {
        super();
        this._values = [];
        this.resolvers = [];
        this._closedPromise = new Promise((r) => this._closedPromiseResolve = r);
    }
    get closed() { return this._closedPromise; }
    async cancel(reason) { await this.return(reason); }
    write(value) {
        if (this._ensureOpen()) {
            this.resolvers.length <= 0
                ? (this._values.push(value))
                : (this.resolvers.shift().resolve({ done: false, value }));
        }
    }
    abort(value) {
        if (this._closedPromiseResolve) {
            this.resolvers.length <= 0
                ? (this._error = { error: value })
                : (this.resolvers.shift().reject({ done: true, value }));
        }
    }
    close() {
        if (this._closedPromiseResolve) {
            const { resolvers } = this;
            while (resolvers.length > 0) {
                resolvers.shift().resolve(extension_ITERATOR_DONE);
            }
            this._closedPromiseResolve();
            this._closedPromiseResolve = undefined;
        }
    }
    [Symbol.asyncIterator]() { return this; }
    toDOMStream(options) {
        return extension_adapters.toDOMStream((this._closedPromiseResolve || this._error)
            ? this
            : this._values, options);
    }
    toNodeStream(options) {
        return extension_adapters.toNodeStream((this._closedPromiseResolve || this._error)
            ? this
            : this._values, options);
    }
    async throw(_) { await this.abort(_); return extension_ITERATOR_DONE; }
    async return(_) { await this.close(); return extension_ITERATOR_DONE; }
    async read(size) { return (await this.next(size, 'read')).value; }
    async peek(size) { return (await this.next(size, 'peek')).value; }
    next(..._args) {
        if (this._values.length > 0) {
            return Promise.resolve({ done: false, value: this._values.shift() });
        }
        else if (this._error) {
            return Promise.reject({ done: true, value: this._error.error });
        }
        else if (!this._closedPromiseResolve) {
            return Promise.resolve(extension_ITERATOR_DONE);
        }
        else {
            return new Promise((resolve, reject) => {
                this.resolvers.push({ resolve, reject });
            });
        }
    }
    _ensureOpen() {
        if (this._closedPromiseResolve) {
            return true;
        }
        throw new Error(`${this} is closed`);
    }
}

//# sourceMappingURL=interfaces.mjs.map

;// ../../node_modules/apache-arrow/util/compat.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
const [extension_BigIntCtor, extension_BigIntAvailable] = (() => {
    const BigIntUnavailableError = () => { throw new Error('BigInt is not available in this environment'); };
    function BigIntUnavailable() { throw BigIntUnavailableError(); }
    BigIntUnavailable.asIntN = () => { throw BigIntUnavailableError(); };
    BigIntUnavailable.asUintN = () => { throw BigIntUnavailableError(); };
    return typeof BigInt !== 'undefined' ? [BigInt, true] : [BigIntUnavailable, false];
})();
/** @ignore */
const [extension_BigInt64ArrayCtor, extension_BigInt64ArrayAvailable] = (() => {
    const BigInt64ArrayUnavailableError = () => { throw new Error('BigInt64Array is not available in this environment'); };
    class BigInt64ArrayUnavailable {
        static get BYTES_PER_ELEMENT() { return 8; }
        static of() { throw BigInt64ArrayUnavailableError(); }
        static from() { throw BigInt64ArrayUnavailableError(); }
        constructor() { throw BigInt64ArrayUnavailableError(); }
    }
    return typeof BigInt64Array !== 'undefined' ? [BigInt64Array, true] : [BigInt64ArrayUnavailable, false];
})();
/** @ignore */
const [extension_BigUint64ArrayCtor, extension_BigUint64ArrayAvailable] = (() => {
    const BigUint64ArrayUnavailableError = () => { throw new Error('BigUint64Array is not available in this environment'); };
    class BigUint64ArrayUnavailable {
        static get BYTES_PER_ELEMENT() { return 8; }
        static of() { throw BigUint64ArrayUnavailableError(); }
        static from() { throw BigUint64ArrayUnavailableError(); }
        constructor() { throw BigUint64ArrayUnavailableError(); }
    }
    return typeof BigUint64Array !== 'undefined' ? [BigUint64Array, true] : [BigUint64ArrayUnavailable, false];
})();



/** @ignore */ const extension_isNumber = (x) => typeof x === 'number';
/** @ignore */ const extension_isBoolean = (x) => typeof x === 'boolean';
/** @ignore */ const extension_compat_isFunction = (x) => typeof x === 'function';
/** @ignore */
const extension_compat_isObject = (x) => x != null && Object(x) === x;
/** @ignore */
const extension_isPromise = (x) => {
    return extension_compat_isObject(x) && extension_compat_isFunction(x.then);
};
/** @ignore */
const extension_isObservable = (x) => {
    return extension_compat_isObject(x) && extension_compat_isFunction(x.subscribe);
};
/** @ignore */
const extension_isIterable = (x) => {
    return extension_compat_isObject(x) && extension_compat_isFunction(x[Symbol.iterator]);
};
/** @ignore */
const extension_isAsyncIterable = (x) => {
    return extension_compat_isObject(x) && extension_compat_isFunction(x[Symbol.asyncIterator]);
};
/** @ignore */
const extension_isArrowJSON = (x) => {
    return extension_compat_isObject(x) && extension_compat_isObject(x['schema']);
};
/** @ignore */
const extension_isArrayLike = (x) => {
    return extension_compat_isObject(x) && extension_isNumber(x['length']);
};
/** @ignore */
const extension_isIteratorResult = (x) => {
    return extension_compat_isObject(x) && ('done' in x) && ('value' in x);
};
/** @ignore */
const extension_isUnderlyingSink = (x) => {
    return extension_compat_isObject(x) &&
        extension_compat_isFunction(x['abort']) &&
        extension_compat_isFunction(x['close']) &&
        extension_compat_isFunction(x['start']) &&
        extension_compat_isFunction(x['write']);
};
/** @ignore */
const extension_isFileHandle = (x) => {
    return extension_compat_isObject(x) && extension_compat_isFunction(x['stat']) && extension_isNumber(x['fd']);
};
/** @ignore */
const extension_isFSReadStream = (x) => {
    return extension_isReadableNodeStream(x) && extension_isNumber(x['bytesRead']);
};
/** @ignore */
const extension_isFetchResponse = (x) => {
    return extension_compat_isObject(x) && extension_isReadableDOMStream(x['body']);
};
/** @ignore */
const extension_isWritableDOMStream = (x) => {
    return extension_compat_isObject(x) &&
        extension_compat_isFunction(x['abort']) &&
        extension_compat_isFunction(x['getWriter']) &&
        !(x instanceof extension_ReadableInterop);
};
/** @ignore */
const extension_isReadableDOMStream = (x) => {
    return extension_compat_isObject(x) &&
        extension_compat_isFunction(x['cancel']) &&
        extension_compat_isFunction(x['getReader']) &&
        !(x instanceof extension_ReadableInterop);
};
/** @ignore */
const extension_isWritableNodeStream = (x) => {
    return extension_compat_isObject(x) &&
        extension_compat_isFunction(x['end']) &&
        extension_compat_isFunction(x['write']) &&
        extension_isBoolean(x['writable']) &&
        !(x instanceof extension_ReadableInterop);
};
/** @ignore */
const extension_isReadableNodeStream = (x) => {
    return extension_compat_isObject(x) &&
        extension_compat_isFunction(x['read']) &&
        extension_compat_isFunction(x['pipe']) &&
        extension_isBoolean(x['readable']) &&
        !(x instanceof extension_ReadableInterop);
};

//# sourceMappingURL=compat.mjs.map

;// ../../node_modules/apache-arrow/util/buffer.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


var extension_ByteBuffer = extension_flatbuffers.ByteBuffer;

/** @ignore */
const extension_SharedArrayBuf = (typeof SharedArrayBuffer !== 'undefined' ? SharedArrayBuffer : ArrayBuffer);
/** @ignore */
function extension_collapseContiguousByteRanges(chunks) {
    let result = chunks[0] ? [chunks[0]] : [];
    let xOffset, yOffset, xLen, yLen;
    for (let x, y, i = 0, j = 0, n = chunks.length; ++i < n;) {
        x = result[j];
        y = chunks[i];
        // continue if x and y don't share the same underlying ArrayBuffer, or if x isn't before y
        if (!x || !y || x.buffer !== y.buffer || y.byteOffset < x.byteOffset) {
            y && (result[++j] = y);
            continue;
        }
        ({ byteOffset: xOffset, byteLength: xLen } = x);
        ({ byteOffset: yOffset, byteLength: yLen } = y);
        // continue if the byte ranges of x and y aren't contiguous
        if ((xOffset + xLen) < yOffset || (yOffset + yLen) < xOffset) {
            y && (result[++j] = y);
            continue;
        }
        result[j] = new Uint8Array(x.buffer, xOffset, yOffset - xOffset + yLen);
    }
    return result;
}
/** @ignore */
function extension_memcpy(target, source, targetByteOffset = 0, sourceByteLength = source.byteLength) {
    const targetByteLength = target.byteLength;
    const dst = new Uint8Array(target.buffer, target.byteOffset, targetByteLength);
    const src = new Uint8Array(source.buffer, source.byteOffset, Math.min(sourceByteLength, targetByteLength));
    dst.set(src, targetByteOffset);
    return target;
}
/** @ignore */
function extension_joinUint8Arrays(chunks, size) {
    // collapse chunks that share the same underlying ArrayBuffer and whose byte ranges overlap,
    // to avoid unnecessarily copying the bytes to do this buffer join. This is a common case during
    // streaming, where we may be reading partial byte ranges out of the same underlying ArrayBuffer
    let result = extension_collapseContiguousByteRanges(chunks);
    let byteLength = result.reduce((x, b) => x + b.byteLength, 0);
    let source, sliced, buffer;
    let offset = 0, index = -1, length = Math.min(size || Infinity, byteLength);
    for (let n = result.length; ++index < n;) {
        source = result[index];
        sliced = source.subarray(0, Math.min(source.length, length - offset));
        if (length <= (offset + sliced.length)) {
            if (sliced.length < source.length) {
                result[index] = source.subarray(sliced.length);
            }
            else if (sliced.length === source.length) {
                index++;
            }
            buffer ? extension_memcpy(buffer, sliced, offset) : (buffer = sliced);
            break;
        }
        extension_memcpy(buffer || (buffer = new Uint8Array(length)), sliced, offset);
        offset += sliced.length;
    }
    return [buffer || new Uint8Array(0), result.slice(index), byteLength - (buffer ? buffer.byteLength : 0)];
}
function extension_toArrayBufferView(ArrayBufferViewCtor, input) {
    let value = extension_isIteratorResult(input) ? input.value : input;
    if (value instanceof ArrayBufferViewCtor) {
        if (ArrayBufferViewCtor === Uint8Array) {
            // Node's `Buffer` class passes the `instanceof Uint8Array` check, but we need
            // a real Uint8Array, since Buffer#slice isn't the same as Uint8Array#slice :/
            return new ArrayBufferViewCtor(value.buffer, value.byteOffset, value.byteLength);
        }
        return value;
    }
    if (!value) {
        return new ArrayBufferViewCtor(0);
    }
    if (typeof value === 'string') {
        value = extension_encodeUtf8(value);
    }
    if (value instanceof ArrayBuffer) {
        return new ArrayBufferViewCtor(value);
    }
    if (value instanceof extension_SharedArrayBuf) {
        return new ArrayBufferViewCtor(value);
    }
    if (value instanceof extension_ByteBuffer) {
        return extension_toArrayBufferView(ArrayBufferViewCtor, value.bytes());
    }
    return !ArrayBuffer.isView(value) ? ArrayBufferViewCtor.from(value) : value.byteLength <= 0 ? new ArrayBufferViewCtor(0)
        : new ArrayBufferViewCtor(value.buffer, value.byteOffset, value.byteLength / ArrayBufferViewCtor.BYTES_PER_ELEMENT);
}
/** @ignore */ const extension_toInt8Array = (input) => extension_toArrayBufferView(Int8Array, input);
/** @ignore */ const extension_toInt16Array = (input) => extension_toArrayBufferView(Int16Array, input);
/** @ignore */ const extension_toInt32Array = (input) => extension_toArrayBufferView(Int32Array, input);
/** @ignore */ const extension_toBigInt64Array = (input) => extension_toArrayBufferView(extension_BigInt64ArrayCtor, input);
/** @ignore */ const extension_toUint8Array = (input) => extension_toArrayBufferView(Uint8Array, input);
/** @ignore */ const extension_toUint16Array = (input) => extension_toArrayBufferView(Uint16Array, input);
/** @ignore */ const extension_toUint32Array = (input) => extension_toArrayBufferView(Uint32Array, input);
/** @ignore */ const extension_toBigUint64Array = (input) => extension_toArrayBufferView(extension_BigUint64ArrayCtor, input);
/** @ignore */ const extension_toFloat32Array = (input) => extension_toArrayBufferView(Float32Array, input);
/** @ignore */ const extension_toFloat64Array = (input) => extension_toArrayBufferView(Float64Array, input);
/** @ignore */ const extension_toUint8ClampedArray = (input) => extension_toArrayBufferView(Uint8ClampedArray, input);
/** @ignore */
const extension_pump = (iterator) => { iterator.next(); return iterator; };
/** @ignore */
function* extension_toArrayBufferViewIterator(ArrayCtor, source) {
    const wrap = function* (x) { yield x; };
    const buffers = (typeof source === 'string') ? wrap(source)
        : (ArrayBuffer.isView(source)) ? wrap(source)
            : (source instanceof ArrayBuffer) ? wrap(source)
                : (source instanceof extension_SharedArrayBuf) ? wrap(source)
                    : !extension_isIterable(source) ? wrap(source) : source;
    yield* extension_pump((function* (it) {
        let r = null;
        do {
            r = it.next(yield extension_toArrayBufferView(ArrayCtor, r));
        } while (!r.done);
    })(buffers[Symbol.iterator]()));
    return new ArrayCtor();
}
/** @ignore */ const extension_toInt8ArrayIterator = (input) => extension_toArrayBufferViewIterator(Int8Array, input);
/** @ignore */ const extension_toInt16ArrayIterator = (input) => extension_toArrayBufferViewIterator(Int16Array, input);
/** @ignore */ const extension_toInt32ArrayIterator = (input) => extension_toArrayBufferViewIterator(Int32Array, input);
/** @ignore */ const extension_toUint8ArrayIterator = (input) => extension_toArrayBufferViewIterator(Uint8Array, input);
/** @ignore */ const extension_toUint16ArrayIterator = (input) => extension_toArrayBufferViewIterator(Uint16Array, input);
/** @ignore */ const extension_toUint32ArrayIterator = (input) => extension_toArrayBufferViewIterator(Uint32Array, input);
/** @ignore */ const extension_toFloat32ArrayIterator = (input) => extension_toArrayBufferViewIterator(Float32Array, input);
/** @ignore */ const extension_toFloat64ArrayIterator = (input) => extension_toArrayBufferViewIterator(Float64Array, input);
/** @ignore */ const extension_toUint8ClampedArrayIterator = (input) => extension_toArrayBufferViewIterator(Uint8ClampedArray, input);
/** @ignore */
async function* extension_toArrayBufferViewAsyncIterator(ArrayCtor, source) {
    // if a Promise, unwrap the Promise and iterate the resolved value
    if (extension_isPromise(source)) {
        return yield* extension_toArrayBufferViewAsyncIterator(ArrayCtor, await source);
    }
    const wrap = async function* (x) { yield await x; };
    const emit = async function* (source) {
        yield* extension_pump((function* (it) {
            let r = null;
            do {
                r = it.next(yield r && r.value);
            } while (!r.done);
        })(source[Symbol.iterator]()));
    };
    const buffers = (typeof source === 'string') ? wrap(source) // if string, wrap in an AsyncIterableIterator
        : (ArrayBuffer.isView(source)) ? wrap(source) // if TypedArray, wrap in an AsyncIterableIterator
            : (source instanceof ArrayBuffer) ? wrap(source) // if ArrayBuffer, wrap in an AsyncIterableIterator
                : (source instanceof extension_SharedArrayBuf) ? wrap(source) // if SharedArrayBuffer, wrap in an AsyncIterableIterator
                    : extension_isIterable(source) ? emit(source) // If Iterable, wrap in an AsyncIterableIterator and compose the `next` values
                        : !extension_isAsyncIterable(source) ? wrap(source) // If not an AsyncIterable, treat as a sentinel and wrap in an AsyncIterableIterator
                            : source; // otherwise if AsyncIterable, use it
    yield* extension_pump((async function* (it) {
        let r = null;
        do {
            r = await it.next(yield extension_toArrayBufferView(ArrayCtor, r));
        } while (!r.done);
    })(buffers[Symbol.asyncIterator]()));
    return new ArrayCtor();
}
/** @ignore */ const extension_toInt8ArrayAsyncIterator = (input) => extension_toArrayBufferViewAsyncIterator(Int8Array, input);
/** @ignore */ const extension_toInt16ArrayAsyncIterator = (input) => extension_toArrayBufferViewAsyncIterator(Int16Array, input);
/** @ignore */ const extension_toInt32ArrayAsyncIterator = (input) => extension_toArrayBufferViewAsyncIterator(Int32Array, input);
/** @ignore */ const extension_toUint8ArrayAsyncIterator = (input) => extension_toArrayBufferViewAsyncIterator(Uint8Array, input);
/** @ignore */ const extension_toUint16ArrayAsyncIterator = (input) => extension_toArrayBufferViewAsyncIterator(Uint16Array, input);
/** @ignore */ const extension_toUint32ArrayAsyncIterator = (input) => extension_toArrayBufferViewAsyncIterator(Uint32Array, input);
/** @ignore */ const extension_toFloat32ArrayAsyncIterator = (input) => extension_toArrayBufferViewAsyncIterator(Float32Array, input);
/** @ignore */ const extension_toFloat64ArrayAsyncIterator = (input) => extension_toArrayBufferViewAsyncIterator(Float64Array, input);
/** @ignore */ const extension_toUint8ClampedArrayAsyncIterator = (input) => extension_toArrayBufferViewAsyncIterator(Uint8ClampedArray, input);
/** @ignore */
function extension_rebaseValueOffsets(offset, length, valueOffsets) {
    // If we have a non-zero offset, create a new offsets array with the values
    // shifted by the start offset, such that the new start offset is 0
    if (offset !== 0) {
        valueOffsets = valueOffsets.slice(0, length + 1);
        for (let i = -1; ++i <= length;) {
            valueOffsets[i] += offset;
        }
    }
    return valueOffsets;
}
/** @ignore */
function extension_compareArrayLike(a, b) {
    let i = 0, n = a.length;
    if (n !== b.length) {
        return false;
    }
    if (n > 0) {
        do {
            if (a[i] !== b[i]) {
                return false;
            }
        } while (++i < n);
    }
    return true;
}

//# sourceMappingURL=buffer.mjs.map

;// ../../node_modules/apache-arrow/io/adapters.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
/* harmony default export */ const extension_adapters = ({
    fromIterable(source) {
        return extension_adapters_pump(extension_adapters_fromIterable(source));
    },
    fromAsyncIterable(source) {
        return extension_adapters_pump(extension_fromAsyncIterable(source));
    },
    fromDOMStream(source) {
        return extension_adapters_pump(extension_fromDOMStream(source));
    },
    fromNodeStream(stream) {
        return extension_adapters_pump(extension_fromNodeStream(stream));
    },
    // @ts-ignore
    toDOMStream(source, options) {
        throw new Error(`"toDOMStream" not available in this environment`);
    },
    // @ts-ignore
    toNodeStream(source, options) {
        throw new Error(`"toNodeStream" not available in this environment`);
    },
});
/** @ignore */
const extension_adapters_pump = (iterator) => { iterator.next(); return iterator; };
/** @ignore */
function* extension_adapters_fromIterable(source) {
    let done, threw = false;
    let buffers = [], buffer;
    let cmd, size, bufferLength = 0;
    function byteRange() {
        if (cmd === 'peek') {
            return extension_joinUint8Arrays(buffers, size)[0];
        }
        [buffer, buffers, bufferLength] = extension_joinUint8Arrays(buffers, size);
        return buffer;
    }
    // Yield so the caller can inject the read command before creating the source Iterator
    ({ cmd, size } = yield null);
    // initialize the iterator
    let it = extension_toUint8ArrayIterator(source)[Symbol.iterator]();
    try {
        do {
            // read the next value
            ({ done, value: buffer } = isNaN(size - bufferLength) ?
                it.next(undefined) : it.next(size - bufferLength));
            // if chunk is not null or empty, push it onto the queue
            if (!done && buffer.byteLength > 0) {
                buffers.push(buffer);
                bufferLength += buffer.byteLength;
            }
            // If we have enough bytes in our buffer, yield chunks until we don't
            if (done || size <= bufferLength) {
                do {
                    ({ cmd, size } = yield byteRange());
                } while (size < bufferLength);
            }
        } while (!done);
    }
    catch (e) {
        (threw = true) && (typeof it.throw === 'function') && (it.throw(e));
    }
    finally {
        (threw === false) && (typeof it.return === 'function') && (it.return(null));
    }
    return null;
}
/** @ignore */
async function* extension_fromAsyncIterable(source) {
    let done, threw = false;
    let buffers = [], buffer;
    let cmd, size, bufferLength = 0;
    function byteRange() {
        if (cmd === 'peek') {
            return extension_joinUint8Arrays(buffers, size)[0];
        }
        [buffer, buffers, bufferLength] = extension_joinUint8Arrays(buffers, size);
        return buffer;
    }
    // Yield so the caller can inject the read command before creating the source AsyncIterator
    ({ cmd, size } = (yield null));
    // initialize the iterator
    let it = extension_toUint8ArrayAsyncIterator(source)[Symbol.asyncIterator]();
    try {
        do {
            // read the next value
            ({ done, value: buffer } = isNaN(size - bufferLength)
                ? await it.next(undefined)
                : await it.next(size - bufferLength));
            // if chunk is not null or empty, push it onto the queue
            if (!done && buffer.byteLength > 0) {
                buffers.push(buffer);
                bufferLength += buffer.byteLength;
            }
            // If we have enough bytes in our buffer, yield chunks until we don't
            if (done || size <= bufferLength) {
                do {
                    ({ cmd, size } = yield byteRange());
                } while (size < bufferLength);
            }
        } while (!done);
    }
    catch (e) {
        (threw = true) && (typeof it.throw === 'function') && (await it.throw(e));
    }
    finally {
        (threw === false) && (typeof it.return === 'function') && (await it.return(new Uint8Array(0)));
    }
    return null;
}
// All this manual Uint8Array chunk management can be avoided if/when engines
// add support for ArrayBuffer.transfer() or ArrayBuffer.prototype.realloc():
// https://github.com/domenic/proposal-arraybuffer-transfer
/** @ignore */
async function* extension_fromDOMStream(source) {
    let done = false, threw = false;
    let buffers = [], buffer;
    let cmd, size, bufferLength = 0;
    function byteRange() {
        if (cmd === 'peek') {
            return extension_joinUint8Arrays(buffers, size)[0];
        }
        [buffer, buffers, bufferLength] = extension_joinUint8Arrays(buffers, size);
        return buffer;
    }
    // Yield so the caller can inject the read command before we establish the ReadableStream lock
    ({ cmd, size } = yield null);
    // initialize the reader and lock the stream
    let it = new extension_AdaptiveByteReader(source);
    try {
        do {
            // read the next value
            ({ done, value: buffer } = isNaN(size - bufferLength)
                ? await it['read'](undefined)
                : await it['read'](size - bufferLength));
            // if chunk is not null or empty, push it onto the queue
            if (!done && buffer.byteLength > 0) {
                buffers.push(extension_toUint8Array(buffer));
                bufferLength += buffer.byteLength;
            }
            // If we have enough bytes in our buffer, yield chunks until we don't
            if (done || size <= bufferLength) {
                do {
                    ({ cmd, size } = yield byteRange());
                } while (size < bufferLength);
            }
        } while (!done);
    }
    catch (e) {
        (threw = true) && (await it['cancel'](e));
    }
    finally {
        (threw === false) ? (await it['cancel']())
            : source['locked'] && it.releaseLock();
    }
    return null;
}
/** @ignore */
class extension_AdaptiveByteReader {
    constructor(source) {
        this.source = source;
        this.byobReader = null;
        this.defaultReader = null;
        try {
            this.supportsBYOB = !!(this.reader = this.getBYOBReader());
        }
        catch (e) {
            this.supportsBYOB = !!!(this.reader = this.getDefaultReader());
        }
    }
    get closed() {
        return this.reader ? this.reader['closed'].catch(() => { }) : Promise.resolve();
    }
    releaseLock() {
        if (this.reader) {
            this.reader.releaseLock();
        }
        this.reader = this.byobReader = this.defaultReader = null;
    }
    async cancel(reason) {
        const { reader, source } = this;
        reader && (await reader['cancel'](reason).catch(() => { }));
        source && (source['locked'] && this.releaseLock());
    }
    async read(size) {
        if (size === 0) {
            return { done: this.reader == null, value: new Uint8Array(0) };
        }
        const result = !this.supportsBYOB || typeof size !== 'number'
            ? await this.getDefaultReader().read()
            : await this.readFromBYOBReader(size);
        !result.done && (result.value = extension_toUint8Array(result));
        return result;
    }
    getDefaultReader() {
        if (this.byobReader) {
            this.releaseLock();
        }
        if (!this.defaultReader) {
            this.defaultReader = this.source['getReader']();
            // We have to catch and swallow errors here to avoid uncaught promise rejection exceptions
            // that seem to be raised when we call `releaseLock()` on this reader. I'm still mystified
            // about why these errors are raised, but I'm sure there's some important spec reason that
            // I haven't considered. I hate to employ such an anti-pattern here, but it seems like the
            // only solution in this case :/
            this.defaultReader['closed'].catch(() => { });
        }
        return (this.reader = this.defaultReader);
    }
    getBYOBReader() {
        if (this.defaultReader) {
            this.releaseLock();
        }
        if (!this.byobReader) {
            this.byobReader = this.source['getReader']({ mode: 'byob' });
            // We have to catch and swallow errors here to avoid uncaught promise rejection exceptions
            // that seem to be raised when we call `releaseLock()` on this reader. I'm still mystified
            // about why these errors are raised, but I'm sure there's some important spec reason that
            // I haven't considered. I hate to employ such an anti-pattern here, but it seems like the
            // only solution in this case :/
            this.byobReader['closed'].catch(() => { });
        }
        return (this.reader = this.byobReader);
    }
    // This strategy plucked from the example in the streams spec:
    // https://streams.spec.whatwg.org/#example-manual-read-bytes
    async readFromBYOBReader(size) {
        return await extension_readInto(this.getBYOBReader(), new ArrayBuffer(size), 0, size);
    }
}
/** @ignore */
async function extension_readInto(reader, buffer, offset, size) {
    if (offset >= size) {
        return { done: false, value: new Uint8Array(buffer, 0, size) };
    }
    const { done, value } = await reader.read(new Uint8Array(buffer, offset, size - offset));
    if (((offset += value.byteLength) < size) && !done) {
        return await extension_readInto(reader, value.buffer, offset, size);
    }
    return { done, value: new Uint8Array(value.buffer, 0, offset) };
}
/** @ignore */
const extension_onEvent = (stream, event) => {
    let handler = (_) => resolve([event, _]);
    let resolve;
    return [event, handler, new Promise((r) => (resolve = r) && stream['once'](event, handler))];
};
/** @ignore */
async function* extension_fromNodeStream(stream) {
    let events = [];
    let event = 'error';
    let done = false, err = null;
    let cmd, size, bufferLength = 0;
    let buffers = [], buffer;
    function byteRange() {
        if (cmd === 'peek') {
            return extension_joinUint8Arrays(buffers, size)[0];
        }
        [buffer, buffers, bufferLength] = extension_joinUint8Arrays(buffers, size);
        return buffer;
    }
    // Yield so the caller can inject the read command before we
    // add the listener for the source stream's 'readable' event.
    ({ cmd, size } = yield null);
    // ignore stdin if it's a TTY
    if (stream['isTTY']) {
        yield new Uint8Array(0);
        return null;
    }
    try {
        // initialize the stream event handlers
        events[0] = extension_onEvent(stream, 'end');
        events[1] = extension_onEvent(stream, 'error');
        do {
            events[2] = extension_onEvent(stream, 'readable');
            // wait on the first message event from the stream
            [event, err] = await Promise.race(events.map((x) => x[2]));
            // if the stream emitted an Error, rethrow it
            if (event === 'error') {
                break;
            }
            if (!(done = event === 'end')) {
                // If the size is NaN, request to read everything in the stream's internal buffer
                if (!isFinite(size - bufferLength)) {
                    buffer = extension_toUint8Array(stream['read'](undefined));
                }
                else {
                    buffer = extension_toUint8Array(stream['read'](size - bufferLength));
                    // If the byteLength is 0, then the requested amount is more than the stream has
                    // in its internal buffer. In this case the stream needs a "kick" to tell it to
                    // continue emitting readable events, so request to read everything the stream
                    // has in its internal buffer right now.
                    if (buffer.byteLength < (size - bufferLength)) {
                        buffer = extension_toUint8Array(stream['read'](undefined));
                    }
                }
                // if chunk is not null or empty, push it onto the queue
                if (buffer.byteLength > 0) {
                    buffers.push(buffer);
                    bufferLength += buffer.byteLength;
                }
            }
            // If we have enough bytes in our buffer, yield chunks until we don't
            if (done || size <= bufferLength) {
                do {
                    ({ cmd, size } = yield byteRange());
                } while (size < bufferLength);
            }
        } while (!done);
    }
    finally {
        await cleanup(events, event === 'error' ? err : null);
    }
    return null;
    function cleanup(events, err) {
        buffer = buffers = null;
        return new Promise(async (resolve, reject) => {
            for (const [evt, fn] of events) {
                stream['off'](evt, fn);
            }
            try {
                // Some stream implementations don't call the destroy callback,
                // because it's really a node-internal API. Just calling `destroy`
                // here should be enough to conform to the ReadableStream contract
                const destroy = stream['destroy'];
                destroy && destroy.call(stream, err);
                err = undefined;
            }
            catch (e) {
                err = e || err;
            }
            finally {
                err != null ? reject(err) : resolve();
            }
        });
    }
}

//# sourceMappingURL=adapters.mjs.map

;// ../../node_modules/apache-arrow/vector.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
class extension_AbstractVector {
}
extension_AbstractVector.prototype.data = null;


//# sourceMappingURL=vector.mjs.map

;// ../../node_modules/apache-arrow/fb/Schema.mjs
/* tslint:disable:class-name */
/**
 * @enum {number}
 */
var extension_Schema_org;
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                let MetadataVersion;
                (function (MetadataVersion) {
                    /**
                     * 0.1.0
                     */
                    MetadataVersion[MetadataVersion["V1"] = 0] = "V1";
                    /**
                     * 0.2.0
                     */
                    MetadataVersion[MetadataVersion["V2"] = 1] = "V2";
                    /**
                     * 0.3.0 -> 0.7.1
                     */
                    MetadataVersion[MetadataVersion["V3"] = 2] = "V3";
                    /**
                     * >= 0.8.0
                     */
                    MetadataVersion[MetadataVersion["V4"] = 3] = "V4";
                })(MetadataVersion = flatbuf.MetadataVersion || (flatbuf.MetadataVersion = {}));
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @enum {number}
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                let UnionMode;
                (function (UnionMode) {
                    UnionMode[UnionMode["Sparse"] = 0] = "Sparse";
                    UnionMode[UnionMode["Dense"] = 1] = "Dense";
                })(UnionMode = flatbuf.UnionMode || (flatbuf.UnionMode = {}));
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @enum {number}
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                let Precision;
                (function (Precision) {
                    Precision[Precision["HALF"] = 0] = "HALF";
                    Precision[Precision["SINGLE"] = 1] = "SINGLE";
                    Precision[Precision["DOUBLE"] = 2] = "DOUBLE";
                })(Precision = flatbuf.Precision || (flatbuf.Precision = {}));
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @enum {number}
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                let DateUnit;
                (function (DateUnit) {
                    DateUnit[DateUnit["DAY"] = 0] = "DAY";
                    DateUnit[DateUnit["MILLISECOND"] = 1] = "MILLISECOND";
                })(DateUnit = flatbuf.DateUnit || (flatbuf.DateUnit = {}));
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @enum {number}
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                let TimeUnit;
                (function (TimeUnit) {
                    TimeUnit[TimeUnit["SECOND"] = 0] = "SECOND";
                    TimeUnit[TimeUnit["MILLISECOND"] = 1] = "MILLISECOND";
                    TimeUnit[TimeUnit["MICROSECOND"] = 2] = "MICROSECOND";
                    TimeUnit[TimeUnit["NANOSECOND"] = 3] = "NANOSECOND";
                })(TimeUnit = flatbuf.TimeUnit || (flatbuf.TimeUnit = {}));
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @enum {number}
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                let IntervalUnit;
                (function (IntervalUnit) {
                    IntervalUnit[IntervalUnit["YEAR_MONTH"] = 0] = "YEAR_MONTH";
                    IntervalUnit[IntervalUnit["DAY_TIME"] = 1] = "DAY_TIME";
                })(IntervalUnit = flatbuf.IntervalUnit || (flatbuf.IntervalUnit = {}));
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * ----------------------------------------------------------------------
 * Top-level Type value, enabling extensible type-specific metadata. We can
 * add new logical types to Type without breaking backwards compatibility
 *
 * @enum {number}
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                let Type;
                (function (Type) {
                    Type[Type["NONE"] = 0] = "NONE";
                    Type[Type["Null"] = 1] = "Null";
                    Type[Type["Int"] = 2] = "Int";
                    Type[Type["FloatingPoint"] = 3] = "FloatingPoint";
                    Type[Type["Binary"] = 4] = "Binary";
                    Type[Type["Utf8"] = 5] = "Utf8";
                    Type[Type["Bool"] = 6] = "Bool";
                    Type[Type["Decimal"] = 7] = "Decimal";
                    Type[Type["Date"] = 8] = "Date";
                    Type[Type["Time"] = 9] = "Time";
                    Type[Type["Timestamp"] = 10] = "Timestamp";
                    Type[Type["Interval"] = 11] = "Interval";
                    Type[Type["List"] = 12] = "List";
                    Type[Type["Struct_"] = 13] = "Struct_";
                    Type[Type["Union"] = 14] = "Union";
                    Type[Type["FixedSizeBinary"] = 15] = "FixedSizeBinary";
                    Type[Type["FixedSizeList"] = 16] = "FixedSizeList";
                    Type[Type["Map"] = 17] = "Map";
                    Type[Type["Duration"] = 18] = "Duration";
                    Type[Type["LargeBinary"] = 19] = "LargeBinary";
                    Type[Type["LargeUtf8"] = 20] = "LargeUtf8";
                    Type[Type["LargeList"] = 21] = "LargeList";
                })(Type = flatbuf.Type || (flatbuf.Type = {}));
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * ----------------------------------------------------------------------
 * Endianness of the platform producing the data
 *
 * @enum {number}
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                let Endianness;
                (function (Endianness) {
                    Endianness[Endianness["Little"] = 0] = "Little";
                    Endianness[Endianness["Big"] = 1] = "Big";
                })(Endianness = flatbuf.Endianness || (flatbuf.Endianness = {}));
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * These are stored in the flatbuffer in the Type union below
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Null {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Null
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Null= obj
                     * @returns Null
                     */
                    static getRootAsNull(bb, obj) {
                        return (obj || new Null).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startNull(builder) {
                        builder.startObject(0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endNull(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createNull(builder) {
                        Null.startNull(builder);
                        return Null.endNull(builder);
                    }
                }
                flatbuf.Null = Null;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * A Struct_ in the flatbuffer metadata is the same as an Arrow Struct
 * (according to the physical memory layout). We used Struct_ here as
 * Struct is a reserved word in Flatbuffers
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Struct_ {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Struct_
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Struct_= obj
                     * @returns Struct_
                     */
                    static getRootAsStruct_(bb, obj) {
                        return (obj || new Struct_).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startStruct_(builder) {
                        builder.startObject(0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endStruct_(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createStruct_(builder) {
                        Struct_.startStruct_(builder);
                        return Struct_.endStruct_(builder);
                    }
                }
                flatbuf.Struct_ = Struct_;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class List {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns List
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param List= obj
                     * @returns List
                     */
                    static getRootAsList(bb, obj) {
                        return (obj || new List).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startList(builder) {
                        builder.startObject(0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endList(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createList(builder) {
                        List.startList(builder);
                        return List.endList(builder);
                    }
                }
                flatbuf.List = List;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * Same as List, but with 64-bit offsets, allowing to represent
 * extremely large data values.
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class LargeList {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns LargeList
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param LargeList= obj
                     * @returns LargeList
                     */
                    static getRootAsLargeList(bb, obj) {
                        return (obj || new LargeList).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startLargeList(builder) {
                        builder.startObject(0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endLargeList(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createLargeList(builder) {
                        LargeList.startLargeList(builder);
                        return LargeList.endLargeList(builder);
                    }
                }
                flatbuf.LargeList = LargeList;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class FixedSizeList {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns FixedSizeList
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param FixedSizeList= obj
                     * @returns FixedSizeList
                     */
                    static getRootAsFixedSizeList(bb, obj) {
                        return (obj || new FixedSizeList).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * Number of list items per value
                     *
                     * @returns number
                     */
                    listSize() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? this.bb.readInt32(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startFixedSizeList(builder) {
                        builder.startObject(1);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number listSize
                     */
                    static addListSize(builder, listSize) {
                        builder.addFieldInt32(0, listSize, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endFixedSizeList(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createFixedSizeList(builder, listSize) {
                        FixedSizeList.startFixedSizeList(builder);
                        FixedSizeList.addListSize(builder, listSize);
                        return FixedSizeList.endFixedSizeList(builder);
                    }
                }
                flatbuf.FixedSizeList = FixedSizeList;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * A Map is a logical nested type that is represented as
 *
 * List<entry: Struct<key: K, value: V>>
 *
 * In this layout, the keys and values are each respectively contiguous. We do
 * not constrain the key and value types, so the application is responsible
 * for ensuring that the keys are hashable and unique. Whether the keys are sorted
 * may be set in the metadata for this field
 *
 * In a Field with Map type, the Field has a child Struct field, which then
 * has two children: key type and the second the value type. The names of the
 * child fields may be respectively "entry", "key", and "value", but this is
 * not enforced
 *
 * Map
 *   - child[0] entry: Struct
 *     - child[0] key: K
 *     - child[1] value: V
 *
 * Neither the "entry" field nor the "key" field may be nullable.
 *
 * The metadata is structured so that Arrow systems without special handling
 * for Map can make Map an alias for List. The "layout" attribute for the Map
 * field must have the same contents as a List.
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Map {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Map
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Map= obj
                     * @returns Map
                     */
                    static getRootAsMap(bb, obj) {
                        return (obj || new Map).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * Set to true if the keys within each value are sorted
                     *
                     * @returns boolean
                     */
                    keysSorted() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? !!this.bb.readInt8(this.bb_pos + offset) : false;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startMap(builder) {
                        builder.startObject(1);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param boolean keysSorted
                     */
                    static addKeysSorted(builder, keysSorted) {
                        builder.addFieldInt8(0, +keysSorted, +false);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endMap(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createMap(builder, keysSorted) {
                        Map.startMap(builder);
                        Map.addKeysSorted(builder, keysSorted);
                        return Map.endMap(builder);
                    }
                }
                flatbuf.Map = Map;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * A union is a complex type with children in Field
 * By default ids in the type vector refer to the offsets in the children
 * optionally typeIds provides an indirection between the child offset and the type id
 * for each child typeIds[offset] is the id used in the type vector
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Union {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Union
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Union= obj
                     * @returns Union
                     */
                    static getRootAsUnion(bb, obj) {
                        return (obj || new Union).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.UnionMode
                     */
                    mode() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? /**  */ (this.bb.readInt16(this.bb_pos + offset)) : org.apache.arrow.flatbuf.UnionMode.Sparse;
                    }
                    /**
                     * @param number index
                     * @returns number
                     */
                    typeIds(index) {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? this.bb.readInt32(this.bb.__vector(this.bb_pos + offset) + index * 4) : 0;
                    }
                    /**
                     * @returns number
                     */
                    typeIdsLength() {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @returns Int32Array
                     */
                    typeIdsArray() {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? new Int32Array(this.bb.bytes().buffer, this.bb.bytes().byteOffset + this.bb.__vector(this.bb_pos + offset), this.bb.__vector_len(this.bb_pos + offset)) : null;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startUnion(builder) {
                        builder.startObject(2);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.UnionMode mode
                     */
                    static addMode(builder, mode) {
                        builder.addFieldInt16(0, mode, org.apache.arrow.flatbuf.UnionMode.Sparse);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset typeIdsOffset
                     */
                    static addTypeIds(builder, typeIdsOffset) {
                        builder.addFieldOffset(1, typeIdsOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param Array.<number> data
                     * @returns flatbuffers.Offset
                     */
                    static createTypeIdsVector(builder, data) {
                        builder.startVector(4, data.length, 4);
                        for (let i = data.length - 1; i >= 0; i--) {
                            builder.addInt32(data[i]);
                        }
                        return builder.endVector();
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number numElems
                     */
                    static startTypeIdsVector(builder, numElems) {
                        builder.startVector(4, numElems, 4);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endUnion(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createUnion(builder, mode, typeIdsOffset) {
                        Union.startUnion(builder);
                        Union.addMode(builder, mode);
                        Union.addTypeIds(builder, typeIdsOffset);
                        return Union.endUnion(builder);
                    }
                }
                flatbuf.Union = Union;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Int {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Int
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Int= obj
                     * @returns Int
                     */
                    static getRootAsInt(bb, obj) {
                        return (obj || new Int).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns number
                     */
                    bitWidth() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? this.bb.readInt32(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @returns boolean
                     */
                    isSigned() {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? !!this.bb.readInt8(this.bb_pos + offset) : false;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startInt(builder) {
                        builder.startObject(2);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number bitWidth
                     */
                    static addBitWidth(builder, bitWidth) {
                        builder.addFieldInt32(0, bitWidth, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param boolean isSigned
                     */
                    static addIsSigned(builder, isSigned) {
                        builder.addFieldInt8(1, +isSigned, +false);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endInt(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createInt(builder, bitWidth, isSigned) {
                        Int.startInt(builder);
                        Int.addBitWidth(builder, bitWidth);
                        Int.addIsSigned(builder, isSigned);
                        return Int.endInt(builder);
                    }
                }
                flatbuf.Int = Int;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class FloatingPoint {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns FloatingPoint
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param FloatingPoint= obj
                     * @returns FloatingPoint
                     */
                    static getRootAsFloatingPoint(bb, obj) {
                        return (obj || new FloatingPoint).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.Precision
                     */
                    precision() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? /**  */ (this.bb.readInt16(this.bb_pos + offset)) : org.apache.arrow.flatbuf.Precision.HALF;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startFloatingPoint(builder) {
                        builder.startObject(1);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.Precision precision
                     */
                    static addPrecision(builder, precision) {
                        builder.addFieldInt16(0, precision, org.apache.arrow.flatbuf.Precision.HALF);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endFloatingPoint(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createFloatingPoint(builder, precision) {
                        FloatingPoint.startFloatingPoint(builder);
                        FloatingPoint.addPrecision(builder, precision);
                        return FloatingPoint.endFloatingPoint(builder);
                    }
                }
                flatbuf.FloatingPoint = FloatingPoint;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * Unicode with UTF-8 encoding
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Utf8 {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Utf8
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Utf8= obj
                     * @returns Utf8
                     */
                    static getRootAsUtf8(bb, obj) {
                        return (obj || new Utf8).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startUtf8(builder) {
                        builder.startObject(0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endUtf8(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createUtf8(builder) {
                        Utf8.startUtf8(builder);
                        return Utf8.endUtf8(builder);
                    }
                }
                flatbuf.Utf8 = Utf8;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * Opaque binary data
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Binary {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Binary
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Binary= obj
                     * @returns Binary
                     */
                    static getRootAsBinary(bb, obj) {
                        return (obj || new Binary).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startBinary(builder) {
                        builder.startObject(0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endBinary(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createBinary(builder) {
                        Binary.startBinary(builder);
                        return Binary.endBinary(builder);
                    }
                }
                flatbuf.Binary = Binary;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * Same as Utf8, but with 64-bit offsets, allowing to represent
 * extremely large data values.
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class LargeUtf8 {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns LargeUtf8
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param LargeUtf8= obj
                     * @returns LargeUtf8
                     */
                    static getRootAsLargeUtf8(bb, obj) {
                        return (obj || new LargeUtf8).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startLargeUtf8(builder) {
                        builder.startObject(0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endLargeUtf8(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createLargeUtf8(builder) {
                        LargeUtf8.startLargeUtf8(builder);
                        return LargeUtf8.endLargeUtf8(builder);
                    }
                }
                flatbuf.LargeUtf8 = LargeUtf8;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * Same as Binary, but with 64-bit offsets, allowing to represent
 * extremely large data values.
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class LargeBinary {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns LargeBinary
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param LargeBinary= obj
                     * @returns LargeBinary
                     */
                    static getRootAsLargeBinary(bb, obj) {
                        return (obj || new LargeBinary).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startLargeBinary(builder) {
                        builder.startObject(0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endLargeBinary(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createLargeBinary(builder) {
                        LargeBinary.startLargeBinary(builder);
                        return LargeBinary.endLargeBinary(builder);
                    }
                }
                flatbuf.LargeBinary = LargeBinary;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class FixedSizeBinary {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns FixedSizeBinary
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param FixedSizeBinary= obj
                     * @returns FixedSizeBinary
                     */
                    static getRootAsFixedSizeBinary(bb, obj) {
                        return (obj || new FixedSizeBinary).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * Number of bytes per value
                     *
                     * @returns number
                     */
                    byteWidth() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? this.bb.readInt32(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startFixedSizeBinary(builder) {
                        builder.startObject(1);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number byteWidth
                     */
                    static addByteWidth(builder, byteWidth) {
                        builder.addFieldInt32(0, byteWidth, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endFixedSizeBinary(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createFixedSizeBinary(builder, byteWidth) {
                        FixedSizeBinary.startFixedSizeBinary(builder);
                        FixedSizeBinary.addByteWidth(builder, byteWidth);
                        return FixedSizeBinary.endFixedSizeBinary(builder);
                    }
                }
                flatbuf.FixedSizeBinary = FixedSizeBinary;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Bool {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Bool
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Bool= obj
                     * @returns Bool
                     */
                    static getRootAsBool(bb, obj) {
                        return (obj || new Bool).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startBool(builder) {
                        builder.startObject(0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endBool(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createBool(builder) {
                        Bool.startBool(builder);
                        return Bool.endBool(builder);
                    }
                }
                flatbuf.Bool = Bool;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Decimal {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Decimal
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Decimal= obj
                     * @returns Decimal
                     */
                    static getRootAsDecimal(bb, obj) {
                        return (obj || new Decimal).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * Total number of decimal digits
                     *
                     * @returns number
                     */
                    precision() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? this.bb.readInt32(this.bb_pos + offset) : 0;
                    }
                    /**
                     * Number of digits after the decimal point "."
                     *
                     * @returns number
                     */
                    scale() {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? this.bb.readInt32(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startDecimal(builder) {
                        builder.startObject(2);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number precision
                     */
                    static addPrecision(builder, precision) {
                        builder.addFieldInt32(0, precision, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number scale
                     */
                    static addScale(builder, scale) {
                        builder.addFieldInt32(1, scale, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endDecimal(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createDecimal(builder, precision, scale) {
                        Decimal.startDecimal(builder);
                        Decimal.addPrecision(builder, precision);
                        Decimal.addScale(builder, scale);
                        return Decimal.endDecimal(builder);
                    }
                }
                flatbuf.Decimal = Decimal;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * Date is either a 32-bit or 64-bit type representing elapsed time since UNIX
 * epoch (1970-01-01), stored in either of two units:
 *
 * * Milliseconds (64 bits) indicating UNIX time elapsed since the epoch (no
 *   leap seconds), where the values are evenly divisible by 86400000
 * * Days (32 bits) since the UNIX epoch
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Date {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Date
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Date= obj
                     * @returns Date
                     */
                    static getRootAsDate(bb, obj) {
                        return (obj || new Date).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.DateUnit
                     */
                    unit() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? /**  */ (this.bb.readInt16(this.bb_pos + offset)) : org.apache.arrow.flatbuf.DateUnit.MILLISECOND;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startDate(builder) {
                        builder.startObject(1);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.DateUnit unit
                     */
                    static addUnit(builder, unit) {
                        builder.addFieldInt16(0, unit, org.apache.arrow.flatbuf.DateUnit.MILLISECOND);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endDate(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createDate(builder, unit) {
                        Date.startDate(builder);
                        Date.addUnit(builder, unit);
                        return Date.endDate(builder);
                    }
                }
                flatbuf.Date = Date;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * Time type. The physical storage type depends on the unit
 * - SECOND and MILLISECOND: 32 bits
 * - MICROSECOND and NANOSECOND: 64 bits
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Time {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Time
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Time= obj
                     * @returns Time
                     */
                    static getRootAsTime(bb, obj) {
                        return (obj || new Time).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.TimeUnit
                     */
                    unit() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? /**  */ (this.bb.readInt16(this.bb_pos + offset)) : org.apache.arrow.flatbuf.TimeUnit.MILLISECOND;
                    }
                    /**
                     * @returns number
                     */
                    bitWidth() {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? this.bb.readInt32(this.bb_pos + offset) : 32;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startTime(builder) {
                        builder.startObject(2);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.TimeUnit unit
                     */
                    static addUnit(builder, unit) {
                        builder.addFieldInt16(0, unit, org.apache.arrow.flatbuf.TimeUnit.MILLISECOND);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number bitWidth
                     */
                    static addBitWidth(builder, bitWidth) {
                        builder.addFieldInt32(1, bitWidth, 32);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endTime(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createTime(builder, unit, bitWidth) {
                        Time.startTime(builder);
                        Time.addUnit(builder, unit);
                        Time.addBitWidth(builder, bitWidth);
                        return Time.endTime(builder);
                    }
                }
                flatbuf.Time = Time;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * Time elapsed from the Unix epoch, 00:00:00.000 on 1 January 1970, excluding
 * leap seconds, as a 64-bit integer. Note that UNIX time does not include
 * leap seconds.
 *
 * The Timestamp metadata supports both "time zone naive" and "time zone
 * aware" timestamps. Read about the timezone attribute for more detail
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Timestamp {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Timestamp
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Timestamp= obj
                     * @returns Timestamp
                     */
                    static getRootAsTimestamp(bb, obj) {
                        return (obj || new Timestamp).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.TimeUnit
                     */
                    unit() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? /**  */ (this.bb.readInt16(this.bb_pos + offset)) : org.apache.arrow.flatbuf.TimeUnit.SECOND;
                    }
                    timezone(optionalEncoding) {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? this.bb.__string(this.bb_pos + offset, optionalEncoding) : null;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startTimestamp(builder) {
                        builder.startObject(2);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.TimeUnit unit
                     */
                    static addUnit(builder, unit) {
                        builder.addFieldInt16(0, unit, org.apache.arrow.flatbuf.TimeUnit.SECOND);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset timezoneOffset
                     */
                    static addTimezone(builder, timezoneOffset) {
                        builder.addFieldOffset(1, timezoneOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endTimestamp(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createTimestamp(builder, unit, timezoneOffset) {
                        Timestamp.startTimestamp(builder);
                        Timestamp.addUnit(builder, unit);
                        Timestamp.addTimezone(builder, timezoneOffset);
                        return Timestamp.endTimestamp(builder);
                    }
                }
                flatbuf.Timestamp = Timestamp;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Interval {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Interval
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Interval= obj
                     * @returns Interval
                     */
                    static getRootAsInterval(bb, obj) {
                        return (obj || new Interval).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.IntervalUnit
                     */
                    unit() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? /**  */ (this.bb.readInt16(this.bb_pos + offset)) : org.apache.arrow.flatbuf.IntervalUnit.YEAR_MONTH;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startInterval(builder) {
                        builder.startObject(1);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.IntervalUnit unit
                     */
                    static addUnit(builder, unit) {
                        builder.addFieldInt16(0, unit, org.apache.arrow.flatbuf.IntervalUnit.YEAR_MONTH);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endInterval(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createInterval(builder, unit) {
                        Interval.startInterval(builder);
                        Interval.addUnit(builder, unit);
                        return Interval.endInterval(builder);
                    }
                }
                flatbuf.Interval = Interval;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Duration {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Duration
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Duration= obj
                     * @returns Duration
                     */
                    static getRootAsDuration(bb, obj) {
                        return (obj || new Duration).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.TimeUnit
                     */
                    unit() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? /**  */ (this.bb.readInt16(this.bb_pos + offset)) : org.apache.arrow.flatbuf.TimeUnit.MILLISECOND;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startDuration(builder) {
                        builder.startObject(1);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.TimeUnit unit
                     */
                    static addUnit(builder, unit) {
                        builder.addFieldInt16(0, unit, org.apache.arrow.flatbuf.TimeUnit.MILLISECOND);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endDuration(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createDuration(builder, unit) {
                        Duration.startDuration(builder);
                        Duration.addUnit(builder, unit);
                        return Duration.endDuration(builder);
                    }
                }
                flatbuf.Duration = Duration;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * ----------------------------------------------------------------------
 * user defined key value pairs to add custom metadata to arrow
 * key namespacing is the responsibility of the user
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class KeyValue {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns KeyValue
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param KeyValue= obj
                     * @returns KeyValue
                     */
                    static getRootAsKeyValue(bb, obj) {
                        return (obj || new KeyValue).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    key(optionalEncoding) {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? this.bb.__string(this.bb_pos + offset, optionalEncoding) : null;
                    }
                    value(optionalEncoding) {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? this.bb.__string(this.bb_pos + offset, optionalEncoding) : null;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startKeyValue(builder) {
                        builder.startObject(2);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset keyOffset
                     */
                    static addKey(builder, keyOffset) {
                        builder.addFieldOffset(0, keyOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset valueOffset
                     */
                    static addValue(builder, valueOffset) {
                        builder.addFieldOffset(1, valueOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endKeyValue(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createKeyValue(builder, keyOffset, valueOffset) {
                        KeyValue.startKeyValue(builder);
                        KeyValue.addKey(builder, keyOffset);
                        KeyValue.addValue(builder, valueOffset);
                        return KeyValue.endKeyValue(builder);
                    }
                }
                flatbuf.KeyValue = KeyValue;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * ----------------------------------------------------------------------
 * Dictionary encoding metadata
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class DictionaryEncoding {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns DictionaryEncoding
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param DictionaryEncoding= obj
                     * @returns DictionaryEncoding
                     */
                    static getRootAsDictionaryEncoding(bb, obj) {
                        return (obj || new DictionaryEncoding).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * The known dictionary id in the application where this data is used. In
                     * the file or streaming formats, the dictionary ids are found in the
                     * DictionaryBatch messages
                     *
                     * @returns flatbuffers.Long
                     */
                    id() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? this.bb.readInt64(this.bb_pos + offset) : this.bb.createLong(0, 0);
                    }
                    /**
                     * The dictionary indices are constrained to be positive integers. If this
                     * field is null, the indices must be signed int32
                     *
                     * @param org.apache.arrow.flatbuf.Int= obj
                     * @returns org.apache.arrow.flatbuf.Int|null
                     */
                    indexType(obj) {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? (obj || new org.apache.arrow.flatbuf.Int).__init(this.bb.__indirect(this.bb_pos + offset), this.bb) : null;
                    }
                    /**
                     * By default, dictionaries are not ordered, or the order does not have
                     * semantic meaning. In some statistical, applications, dictionary-encoding
                     * is used to represent ordered categorical data, and we provide a way to
                     * preserve that metadata here
                     *
                     * @returns boolean
                     */
                    isOrdered() {
                        let offset = this.bb.__offset(this.bb_pos, 8);
                        return offset ? !!this.bb.readInt8(this.bb_pos + offset) : false;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startDictionaryEncoding(builder) {
                        builder.startObject(3);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Long id
                     */
                    static addId(builder, id) {
                        builder.addFieldInt64(0, id, builder.createLong(0, 0));
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset indexTypeOffset
                     */
                    static addIndexType(builder, indexTypeOffset) {
                        builder.addFieldOffset(1, indexTypeOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param boolean isOrdered
                     */
                    static addIsOrdered(builder, isOrdered) {
                        builder.addFieldInt8(2, +isOrdered, +false);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endDictionaryEncoding(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createDictionaryEncoding(builder, id, indexTypeOffset, isOrdered) {
                        DictionaryEncoding.startDictionaryEncoding(builder);
                        DictionaryEncoding.addId(builder, id);
                        DictionaryEncoding.addIndexType(builder, indexTypeOffset);
                        DictionaryEncoding.addIsOrdered(builder, isOrdered);
                        return DictionaryEncoding.endDictionaryEncoding(builder);
                    }
                }
                flatbuf.DictionaryEncoding = DictionaryEncoding;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * ----------------------------------------------------------------------
 * A field represents a named column in a record / row batch or child of a
 * nested type.
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Field {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Field
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Field= obj
                     * @returns Field
                     */
                    static getRootAsField(bb, obj) {
                        return (obj || new Field).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    name(optionalEncoding) {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? this.bb.__string(this.bb_pos + offset, optionalEncoding) : null;
                    }
                    /**
                     * Whether or not this field can contain nulls. Should be true in general.
                     *
                     * @returns boolean
                     */
                    nullable() {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? !!this.bb.readInt8(this.bb_pos + offset) : false;
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.Type
                     */
                    typeType() {
                        let offset = this.bb.__offset(this.bb_pos, 8);
                        return offset ? /**  */ (this.bb.readUint8(this.bb_pos + offset)) : org.apache.arrow.flatbuf.Type.NONE;
                    }
                    /**
                     * This is the type of the decoded value if the field is dictionary encoded.
                     *
                     * @param flatbuffers.Table obj
                     * @returns ?flatbuffers.Table
                     */
                    type(obj) {
                        let offset = this.bb.__offset(this.bb_pos, 10);
                        return offset ? this.bb.__union(obj, this.bb_pos + offset) : null;
                    }
                    /**
                     * Present only if the field is dictionary encoded.
                     *
                     * @param org.apache.arrow.flatbuf.DictionaryEncoding= obj
                     * @returns org.apache.arrow.flatbuf.DictionaryEncoding|null
                     */
                    dictionary(obj) {
                        let offset = this.bb.__offset(this.bb_pos, 12);
                        return offset ? (obj || new org.apache.arrow.flatbuf.DictionaryEncoding).__init(this.bb.__indirect(this.bb_pos + offset), this.bb) : null;
                    }
                    /**
                     * children apply only to nested data types like Struct, List and Union. For
                     * primitive types children will have length 0.
                     *
                     * @param number index
                     * @param org.apache.arrow.flatbuf.Field= obj
                     * @returns org.apache.arrow.flatbuf.Field
                     */
                    children(index, obj) {
                        let offset = this.bb.__offset(this.bb_pos, 14);
                        return offset ? (obj || new org.apache.arrow.flatbuf.Field).__init(this.bb.__indirect(this.bb.__vector(this.bb_pos + offset) + index * 4), this.bb) : null;
                    }
                    /**
                     * @returns number
                     */
                    childrenLength() {
                        let offset = this.bb.__offset(this.bb_pos, 14);
                        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
                    }
                    /**
                     * User-defined metadata
                     *
                     * @param number index
                     * @param org.apache.arrow.flatbuf.KeyValue= obj
                     * @returns org.apache.arrow.flatbuf.KeyValue
                     */
                    customMetadata(index, obj) {
                        let offset = this.bb.__offset(this.bb_pos, 16);
                        return offset ? (obj || new org.apache.arrow.flatbuf.KeyValue).__init(this.bb.__indirect(this.bb.__vector(this.bb_pos + offset) + index * 4), this.bb) : null;
                    }
                    /**
                     * @returns number
                     */
                    customMetadataLength() {
                        let offset = this.bb.__offset(this.bb_pos, 16);
                        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startField(builder) {
                        builder.startObject(7);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset nameOffset
                     */
                    static addName(builder, nameOffset) {
                        builder.addFieldOffset(0, nameOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param boolean nullable
                     */
                    static addNullable(builder, nullable) {
                        builder.addFieldInt8(1, +nullable, +false);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.Type typeType
                     */
                    static addTypeType(builder, typeType) {
                        builder.addFieldInt8(2, typeType, org.apache.arrow.flatbuf.Type.NONE);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset typeOffset
                     */
                    static addType(builder, typeOffset) {
                        builder.addFieldOffset(3, typeOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset dictionaryOffset
                     */
                    static addDictionary(builder, dictionaryOffset) {
                        builder.addFieldOffset(4, dictionaryOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset childrenOffset
                     */
                    static addChildren(builder, childrenOffset) {
                        builder.addFieldOffset(5, childrenOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param Array.<flatbuffers.Offset> data
                     * @returns flatbuffers.Offset
                     */
                    static createChildrenVector(builder, data) {
                        builder.startVector(4, data.length, 4);
                        for (let i = data.length - 1; i >= 0; i--) {
                            builder.addOffset(data[i]);
                        }
                        return builder.endVector();
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number numElems
                     */
                    static startChildrenVector(builder, numElems) {
                        builder.startVector(4, numElems, 4);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset customMetadataOffset
                     */
                    static addCustomMetadata(builder, customMetadataOffset) {
                        builder.addFieldOffset(6, customMetadataOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param Array.<flatbuffers.Offset> data
                     * @returns flatbuffers.Offset
                     */
                    static createCustomMetadataVector(builder, data) {
                        builder.startVector(4, data.length, 4);
                        for (let i = data.length - 1; i >= 0; i--) {
                            builder.addOffset(data[i]);
                        }
                        return builder.endVector();
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number numElems
                     */
                    static startCustomMetadataVector(builder, numElems) {
                        builder.startVector(4, numElems, 4);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endField(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createField(builder, nameOffset, nullable, typeType, typeOffset, dictionaryOffset, childrenOffset, customMetadataOffset) {
                        Field.startField(builder);
                        Field.addName(builder, nameOffset);
                        Field.addNullable(builder, nullable);
                        Field.addTypeType(builder, typeType);
                        Field.addType(builder, typeOffset);
                        Field.addDictionary(builder, dictionaryOffset);
                        Field.addChildren(builder, childrenOffset);
                        Field.addCustomMetadata(builder, customMetadataOffset);
                        return Field.endField(builder);
                    }
                }
                flatbuf.Field = Field;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * ----------------------------------------------------------------------
 * A Buffer represents a single contiguous memory segment
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Buffer {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Buffer
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * The relative offset into the shared memory page where the bytes for this
                     * buffer starts
                     *
                     * @returns flatbuffers.Long
                     */
                    offset() {
                        return this.bb.readInt64(this.bb_pos);
                    }
                    /**
                     * The absolute length (in bytes) of the memory buffer. The memory is found
                     * from offset (inclusive) to offset + length (non-inclusive).
                     *
                     * @returns flatbuffers.Long
                     */
                    length() {
                        return this.bb.readInt64(this.bb_pos + 8);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Long offset
                     * @param flatbuffers.Long length
                     * @returns flatbuffers.Offset
                     */
                    static createBuffer(builder, offset, length) {
                        builder.prep(8, 16);
                        builder.writeInt64(length);
                        builder.writeInt64(offset);
                        return builder.offset();
                    }
                }
                flatbuf.Buffer = Buffer;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));
/**
 * ----------------------------------------------------------------------
 * A Schema describes the columns in a row batch
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Schema {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Schema
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Schema= obj
                     * @returns Schema
                     */
                    static getRootAsSchema(bb, obj) {
                        return (obj || new Schema).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * endianness of the buffer
                     * it is Little Endian by default
                     * if endianness doesn't match the underlying system then the vectors need to be converted
                     *
                     * @returns org.apache.arrow.flatbuf.Endianness
                     */
                    endianness() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? /**  */ (this.bb.readInt16(this.bb_pos + offset)) : org.apache.arrow.flatbuf.Endianness.Little;
                    }
                    /**
                     * @param number index
                     * @param org.apache.arrow.flatbuf.Field= obj
                     * @returns org.apache.arrow.flatbuf.Field
                     */
                    fields(index, obj) {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? (obj || new org.apache.arrow.flatbuf.Field).__init(this.bb.__indirect(this.bb.__vector(this.bb_pos + offset) + index * 4), this.bb) : null;
                    }
                    /**
                     * @returns number
                     */
                    fieldsLength() {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @param number index
                     * @param org.apache.arrow.flatbuf.KeyValue= obj
                     * @returns org.apache.arrow.flatbuf.KeyValue
                     */
                    customMetadata(index, obj) {
                        let offset = this.bb.__offset(this.bb_pos, 8);
                        return offset ? (obj || new org.apache.arrow.flatbuf.KeyValue).__init(this.bb.__indirect(this.bb.__vector(this.bb_pos + offset) + index * 4), this.bb) : null;
                    }
                    /**
                     * @returns number
                     */
                    customMetadataLength() {
                        let offset = this.bb.__offset(this.bb_pos, 8);
                        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startSchema(builder) {
                        builder.startObject(3);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.Endianness endianness
                     */
                    static addEndianness(builder, endianness) {
                        builder.addFieldInt16(0, endianness, org.apache.arrow.flatbuf.Endianness.Little);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset fieldsOffset
                     */
                    static addFields(builder, fieldsOffset) {
                        builder.addFieldOffset(1, fieldsOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param Array.<flatbuffers.Offset> data
                     * @returns flatbuffers.Offset
                     */
                    static createFieldsVector(builder, data) {
                        builder.startVector(4, data.length, 4);
                        for (let i = data.length - 1; i >= 0; i--) {
                            builder.addOffset(data[i]);
                        }
                        return builder.endVector();
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number numElems
                     */
                    static startFieldsVector(builder, numElems) {
                        builder.startVector(4, numElems, 4);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset customMetadataOffset
                     */
                    static addCustomMetadata(builder, customMetadataOffset) {
                        builder.addFieldOffset(2, customMetadataOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param Array.<flatbuffers.Offset> data
                     * @returns flatbuffers.Offset
                     */
                    static createCustomMetadataVector(builder, data) {
                        builder.startVector(4, data.length, 4);
                        for (let i = data.length - 1; i >= 0; i--) {
                            builder.addOffset(data[i]);
                        }
                        return builder.endVector();
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number numElems
                     */
                    static startCustomMetadataVector(builder, numElems) {
                        builder.startVector(4, numElems, 4);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endSchema(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset offset
                     */
                    static finishSchemaBuffer(builder, offset) {
                        builder.finish(offset);
                    }
                    static createSchema(builder, endianness, fieldsOffset, customMetadataOffset) {
                        Schema.startSchema(builder);
                        Schema.addEndianness(builder, endianness);
                        Schema.addFields(builder, fieldsOffset);
                        Schema.addCustomMetadata(builder, customMetadataOffset);
                        return Schema.endSchema(builder);
                    }
                }
                flatbuf.Schema = Schema;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_Schema_org || (extension_Schema_org = {}));

//# sourceMappingURL=Schema.mjs.map

;// ../../node_modules/apache-arrow/fb/Message.mjs
// automatically generated by the FlatBuffers compiler, do not modify

var extension_org;
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                flatbuf.Schema = extension_Schema_org.apache.arrow.flatbuf.Schema;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_org || (extension_org = {}));
/**
 * ----------------------------------------------------------------------
 * The root Message type
 * This union enables us to easily send different message types without
 * redundant storage, and in the future we can easily add new message types.
 *
 * Arrow implementations do not need to implement all of the message types,
 * which may include experimental metadata types. For maximum compatibility,
 * it is best to send data using RecordBatch
 *
 * @enum {number}
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                let MessageHeader;
                (function (MessageHeader) {
                    MessageHeader[MessageHeader["NONE"] = 0] = "NONE";
                    MessageHeader[MessageHeader["Schema"] = 1] = "Schema";
                    MessageHeader[MessageHeader["DictionaryBatch"] = 2] = "DictionaryBatch";
                    MessageHeader[MessageHeader["RecordBatch"] = 3] = "RecordBatch";
                    MessageHeader[MessageHeader["Tensor"] = 4] = "Tensor";
                    MessageHeader[MessageHeader["SparseTensor"] = 5] = "SparseTensor";
                })(MessageHeader = flatbuf.MessageHeader || (flatbuf.MessageHeader = {}));
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_org || (extension_org = {}));
/**
 * ----------------------------------------------------------------------
 * Data structures for describing a table row batch (a collection of
 * equal-length Arrow arrays)
 * Metadata about a field at some level of a nested type tree (but not
 * its children).
 *
 * For example, a List<Int16> with values [[1, 2, 3], null, [4], [5, 6], null]
 * would have {length: 5, null_count: 2} for its List node, and {length: 6,
 * null_count: 0} for its Int16 node, as separate FieldNode structs
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class FieldNode {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns FieldNode
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * The number of value slots in the Arrow array at this level of a nested
                     * tree
                     *
                     * @returns flatbuffers.Long
                     */
                    length() {
                        return this.bb.readInt64(this.bb_pos);
                    }
                    /**
                     * The number of observed nulls. Fields with null_count == 0 may choose not
                     * to write their physical validity bitmap out as a materialized buffer,
                     * instead setting the length of the bitmap buffer to 0.
                     *
                     * @returns flatbuffers.Long
                     */
                    nullCount() {
                        return this.bb.readInt64(this.bb_pos + 8);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Long length
                     * @param flatbuffers.Long null_count
                     * @returns flatbuffers.Offset
                     */
                    static createFieldNode(builder, length, null_count) {
                        builder.prep(8, 16);
                        builder.writeInt64(null_count);
                        builder.writeInt64(length);
                        return builder.offset();
                    }
                }
                flatbuf.FieldNode = FieldNode;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_org || (extension_org = {}));
/**
 * A data header describing the shared memory layout of a "record" or "row"
 * batch. Some systems call this a "row batch" internally and others a "record
 * batch".
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class RecordBatch {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns RecordBatch
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param RecordBatch= obj
                     * @returns RecordBatch
                     */
                    static getRootAsRecordBatch(bb, obj) {
                        return (obj || new RecordBatch).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * number of records / rows. The arrays in the batch should all have this
                     * length
                     *
                     * @returns flatbuffers.Long
                     */
                    length() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? this.bb.readInt64(this.bb_pos + offset) : this.bb.createLong(0, 0);
                    }
                    /**
                     * Nodes correspond to the pre-ordered flattened logical schema
                     *
                     * @param number index
                     * @param org.apache.arrow.flatbuf.FieldNode= obj
                     * @returns org.apache.arrow.flatbuf.FieldNode
                     */
                    nodes(index, obj) {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? (obj || new org.apache.arrow.flatbuf.FieldNode).__init(this.bb.__vector(this.bb_pos + offset) + index * 16, this.bb) : null;
                    }
                    /**
                     * @returns number
                     */
                    nodesLength() {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
                    }
                    /**
                     * Buffers correspond to the pre-ordered flattened buffer tree
                     *
                     * The number of buffers appended to this list depends on the schema. For
                     * example, most primitive arrays will have 2 buffers, 1 for the validity
                     * bitmap and 1 for the values. For struct arrays, there will only be a
                     * single buffer for the validity (nulls) bitmap
                     *
                     * @param number index
                     * @param org.apache.arrow.flatbuf.Buffer= obj
                     * @returns org.apache.arrow.flatbuf.Buffer
                     */
                    buffers(index, obj) {
                        let offset = this.bb.__offset(this.bb_pos, 8);
                        return offset ? (obj || new extension_Schema_org.apache.arrow.flatbuf.Buffer).__init(this.bb.__vector(this.bb_pos + offset) + index * 16, this.bb) : null;
                    }
                    /**
                     * @returns number
                     */
                    buffersLength() {
                        let offset = this.bb.__offset(this.bb_pos, 8);
                        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startRecordBatch(builder) {
                        builder.startObject(3);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Long length
                     */
                    static addLength(builder, length) {
                        builder.addFieldInt64(0, length, builder.createLong(0, 0));
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset nodesOffset
                     */
                    static addNodes(builder, nodesOffset) {
                        builder.addFieldOffset(1, nodesOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number numElems
                     */
                    static startNodesVector(builder, numElems) {
                        builder.startVector(16, numElems, 8);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset buffersOffset
                     */
                    static addBuffers(builder, buffersOffset) {
                        builder.addFieldOffset(2, buffersOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number numElems
                     */
                    static startBuffersVector(builder, numElems) {
                        builder.startVector(16, numElems, 8);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endRecordBatch(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createRecordBatch(builder, length, nodesOffset, buffersOffset) {
                        RecordBatch.startRecordBatch(builder);
                        RecordBatch.addLength(builder, length);
                        RecordBatch.addNodes(builder, nodesOffset);
                        RecordBatch.addBuffers(builder, buffersOffset);
                        return RecordBatch.endRecordBatch(builder);
                    }
                }
                flatbuf.RecordBatch = RecordBatch;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_org || (extension_org = {}));
/**
 * For sending dictionary encoding information. Any Field can be
 * dictionary-encoded, but in this case none of its children may be
 * dictionary-encoded.
 * There is one vector / column per dictionary, but that vector / column
 * may be spread across multiple dictionary batches by using the isDelta
 * flag
 *
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class DictionaryBatch {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns DictionaryBatch
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param DictionaryBatch= obj
                     * @returns DictionaryBatch
                     */
                    static getRootAsDictionaryBatch(bb, obj) {
                        return (obj || new DictionaryBatch).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns flatbuffers.Long
                     */
                    id() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? this.bb.readInt64(this.bb_pos + offset) : this.bb.createLong(0, 0);
                    }
                    /**
                     * @param org.apache.arrow.flatbuf.RecordBatch= obj
                     * @returns org.apache.arrow.flatbuf.RecordBatch|null
                     */
                    data(obj) {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? (obj || new org.apache.arrow.flatbuf.RecordBatch).__init(this.bb.__indirect(this.bb_pos + offset), this.bb) : null;
                    }
                    /**
                     * If isDelta is true the values in the dictionary are to be appended to a
                     * dictionary with the indicated id
                     *
                     * @returns boolean
                     */
                    isDelta() {
                        let offset = this.bb.__offset(this.bb_pos, 8);
                        return offset ? !!this.bb.readInt8(this.bb_pos + offset) : false;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startDictionaryBatch(builder) {
                        builder.startObject(3);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Long id
                     */
                    static addId(builder, id) {
                        builder.addFieldInt64(0, id, builder.createLong(0, 0));
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset dataOffset
                     */
                    static addData(builder, dataOffset) {
                        builder.addFieldOffset(1, dataOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param boolean isDelta
                     */
                    static addIsDelta(builder, isDelta) {
                        builder.addFieldInt8(2, +isDelta, +false);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endDictionaryBatch(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    static createDictionaryBatch(builder, id, dataOffset, isDelta) {
                        DictionaryBatch.startDictionaryBatch(builder);
                        DictionaryBatch.addId(builder, id);
                        DictionaryBatch.addData(builder, dataOffset);
                        DictionaryBatch.addIsDelta(builder, isDelta);
                        return DictionaryBatch.endDictionaryBatch(builder);
                    }
                }
                flatbuf.DictionaryBatch = DictionaryBatch;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_org || (extension_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Message {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Message
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Message= obj
                     * @returns Message
                     */
                    static getRootAsMessage(bb, obj) {
                        return (obj || new Message).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.MetadataVersion
                     */
                    version() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? /**  */ (this.bb.readInt16(this.bb_pos + offset)) : extension_Schema_org.apache.arrow.flatbuf.MetadataVersion.V1;
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.MessageHeader
                     */
                    headerType() {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? /**  */ (this.bb.readUint8(this.bb_pos + offset)) : org.apache.arrow.flatbuf.MessageHeader.NONE;
                    }
                    /**
                     * @param flatbuffers.Table obj
                     * @returns ?flatbuffers.Table
                     */
                    header(obj) {
                        let offset = this.bb.__offset(this.bb_pos, 8);
                        return offset ? this.bb.__union(obj, this.bb_pos + offset) : null;
                    }
                    /**
                     * @returns flatbuffers.Long
                     */
                    bodyLength() {
                        let offset = this.bb.__offset(this.bb_pos, 10);
                        return offset ? this.bb.readInt64(this.bb_pos + offset) : this.bb.createLong(0, 0);
                    }
                    /**
                     * @param number index
                     * @param org.apache.arrow.flatbuf.KeyValue= obj
                     * @returns org.apache.arrow.flatbuf.KeyValue
                     */
                    customMetadata(index, obj) {
                        let offset = this.bb.__offset(this.bb_pos, 12);
                        return offset ? (obj || new extension_Schema_org.apache.arrow.flatbuf.KeyValue).__init(this.bb.__indirect(this.bb.__vector(this.bb_pos + offset) + index * 4), this.bb) : null;
                    }
                    /**
                     * @returns number
                     */
                    customMetadataLength() {
                        let offset = this.bb.__offset(this.bb_pos, 12);
                        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startMessage(builder) {
                        builder.startObject(5);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.MetadataVersion version
                     */
                    static addVersion(builder, version) {
                        builder.addFieldInt16(0, version, extension_Schema_org.apache.arrow.flatbuf.MetadataVersion.V1);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.MessageHeader headerType
                     */
                    static addHeaderType(builder, headerType) {
                        builder.addFieldInt8(1, headerType, org.apache.arrow.flatbuf.MessageHeader.NONE);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset headerOffset
                     */
                    static addHeader(builder, headerOffset) {
                        builder.addFieldOffset(2, headerOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Long bodyLength
                     */
                    static addBodyLength(builder, bodyLength) {
                        builder.addFieldInt64(3, bodyLength, builder.createLong(0, 0));
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset customMetadataOffset
                     */
                    static addCustomMetadata(builder, customMetadataOffset) {
                        builder.addFieldOffset(4, customMetadataOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param Array.<flatbuffers.Offset> data
                     * @returns flatbuffers.Offset
                     */
                    static createCustomMetadataVector(builder, data) {
                        builder.startVector(4, data.length, 4);
                        for (let i = data.length - 1; i >= 0; i--) {
                            builder.addOffset(data[i]);
                        }
                        return builder.endVector();
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number numElems
                     */
                    static startCustomMetadataVector(builder, numElems) {
                        builder.startVector(4, numElems, 4);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endMessage(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset offset
                     */
                    static finishMessageBuffer(builder, offset) {
                        builder.finish(offset);
                    }
                    static createMessage(builder, version, headerType, headerOffset, bodyLength, customMetadataOffset) {
                        Message.startMessage(builder);
                        Message.addVersion(builder, version);
                        Message.addHeaderType(builder, headerType);
                        Message.addHeader(builder, headerOffset);
                        Message.addBodyLength(builder, bodyLength);
                        Message.addCustomMetadata(builder, customMetadataOffset);
                        return Message.endMessage(builder);
                    }
                }
                flatbuf.Message = Message;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_org || (extension_org = {}));

//# sourceMappingURL=Message.mjs.map

;// ../../node_modules/apache-arrow/enum.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


var extension_ArrowType = extension_Schema_org.apache.arrow.flatbuf.Type;
var extension_DateUnit = extension_Schema_org.apache.arrow.flatbuf.DateUnit;
var extension_TimeUnit = extension_Schema_org.apache.arrow.flatbuf.TimeUnit;
var extension_Precision = extension_Schema_org.apache.arrow.flatbuf.Precision;
var extension_UnionMode = extension_Schema_org.apache.arrow.flatbuf.UnionMode;
var extension_IntervalUnit = extension_Schema_org.apache.arrow.flatbuf.IntervalUnit;
var extension_MessageHeader = extension_org.apache.arrow.flatbuf.MessageHeader;
var extension_MetadataVersion = extension_Schema_org.apache.arrow.flatbuf.MetadataVersion;
/**
 * Main data type enumeration.
 *
 * Data types in this library are all *logical*. They can be expressed as
 * either a primitive physical type (bytes or bits of some fixed size), a
 * nested type consisting of other data types, or another data type (e.g. a
 * timestamp encoded as an int64).
 *
 * **Note**: Only enum values 0-17 (NONE through Map) are written to an Arrow
 * IPC payload.
 *
 * The rest of the values are specified here so TypeScript can narrow the type
 * signatures further beyond the base Arrow Types. The Arrow DataTypes include
 * metadata like `bitWidth` that impact the type signatures of the values we
 * accept and return.
 *
 * For example, the `Int8Vector` reads 1-byte numbers from an `Int8Array`, an
 * `Int32Vector` reads a 4-byte number from an `Int32Array`, and an `Int64Vector`
 * reads a pair of 4-byte lo, hi 32-bit integers as a zero-copy slice from the
 * underlying `Int32Array`.
 *
 * Library consumers benefit by knowing the narrowest type, since we can ensure
 * the types across all public methods are propagated, and never bail to `any`.
 * These values are _never_ used at runtime, and they will _never_ be written
 * to the flatbuffers metadata of serialized Arrow IPC payloads.
 */
var extension_Type;
(function (Type) {
    /** The default placeholder type */
    Type[Type["NONE"] = 0] = "NONE";
    /** A NULL type having no physical storage */
    Type[Type["Null"] = 1] = "Null";
    /** Signed or unsigned 8, 16, 32, or 64-bit little-endian integer */
    Type[Type["Int"] = 2] = "Int";
    /** 2, 4, or 8-byte floating point value */
    Type[Type["Float"] = 3] = "Float";
    /** Variable-length bytes (no guarantee of UTF8-ness) */
    Type[Type["Binary"] = 4] = "Binary";
    /** UTF8 variable-length string as List<Char> */
    Type[Type["Utf8"] = 5] = "Utf8";
    /** Boolean as 1 bit, LSB bit-packed ordering */
    Type[Type["Bool"] = 6] = "Bool";
    /** Precision-and-scale-based decimal type. Storage type depends on the parameters. */
    Type[Type["Decimal"] = 7] = "Decimal";
    /** int32_t days or int64_t milliseconds since the UNIX epoch */
    Type[Type["Date"] = 8] = "Date";
    /** Time as signed 32 or 64-bit integer, representing either seconds, milliseconds, microseconds, or nanoseconds since midnight since midnight */
    Type[Type["Time"] = 9] = "Time";
    /** Exact timestamp encoded with int64 since UNIX epoch (Default unit millisecond) */
    Type[Type["Timestamp"] = 10] = "Timestamp";
    /** YEAR_MONTH or DAY_TIME interval in SQL style */
    Type[Type["Interval"] = 11] = "Interval";
    /** A list of some logical data type */
    Type[Type["List"] = 12] = "List";
    /** Struct of logical types */
    Type[Type["Struct"] = 13] = "Struct";
    /** Union of logical types */
    Type[Type["Union"] = 14] = "Union";
    /** Fixed-size binary. Each value occupies the same number of bytes */
    Type[Type["FixedSizeBinary"] = 15] = "FixedSizeBinary";
    /** Fixed-size list. Each value occupies the same number of bytes */
    Type[Type["FixedSizeList"] = 16] = "FixedSizeList";
    /** Map of named logical types */
    Type[Type["Map"] = 17] = "Map";
    /** Dictionary aka Category type */
    Type[Type["Dictionary"] = -1] = "Dictionary";
    Type[Type["Int8"] = -2] = "Int8";
    Type[Type["Int16"] = -3] = "Int16";
    Type[Type["Int32"] = -4] = "Int32";
    Type[Type["Int64"] = -5] = "Int64";
    Type[Type["Uint8"] = -6] = "Uint8";
    Type[Type["Uint16"] = -7] = "Uint16";
    Type[Type["Uint32"] = -8] = "Uint32";
    Type[Type["Uint64"] = -9] = "Uint64";
    Type[Type["Float16"] = -10] = "Float16";
    Type[Type["Float32"] = -11] = "Float32";
    Type[Type["Float64"] = -12] = "Float64";
    Type[Type["DateDay"] = -13] = "DateDay";
    Type[Type["DateMillisecond"] = -14] = "DateMillisecond";
    Type[Type["TimestampSecond"] = -15] = "TimestampSecond";
    Type[Type["TimestampMillisecond"] = -16] = "TimestampMillisecond";
    Type[Type["TimestampMicrosecond"] = -17] = "TimestampMicrosecond";
    Type[Type["TimestampNanosecond"] = -18] = "TimestampNanosecond";
    Type[Type["TimeSecond"] = -19] = "TimeSecond";
    Type[Type["TimeMillisecond"] = -20] = "TimeMillisecond";
    Type[Type["TimeMicrosecond"] = -21] = "TimeMicrosecond";
    Type[Type["TimeNanosecond"] = -22] = "TimeNanosecond";
    Type[Type["DenseUnion"] = -23] = "DenseUnion";
    Type[Type["SparseUnion"] = -24] = "SparseUnion";
    Type[Type["IntervalDayTime"] = -25] = "IntervalDayTime";
    Type[Type["IntervalYearMonth"] = -26] = "IntervalYearMonth";
})(extension_Type || (extension_Type = {}));
var extension_BufferType;
(function (BufferType) {
    /**
     * used in List type, Dense Union and variable length primitive types (String, Binary)
     */
    BufferType[BufferType["OFFSET"] = 0] = "OFFSET";
    /**
     * actual data, either wixed width primitive types in slots or variable width delimited by an OFFSET vector
     */
    BufferType[BufferType["DATA"] = 1] = "DATA";
    /**
     * Bit vector indicating if each value is null
     */
    BufferType[BufferType["VALIDITY"] = 2] = "VALIDITY";
    /**
     * Type vector used in Union type
     */
    BufferType[BufferType["TYPE"] = 3] = "TYPE";
})(extension_BufferType || (extension_BufferType = {}));

//# sourceMappingURL=enum.mjs.map

;// ../../node_modules/apache-arrow/util/bit.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
/** @ignore */
function extension_getBool(_data, _index, byte, bit) {
    return (byte & 1 << bit) !== 0;
}
/** @ignore */
function extension_getBit(_data, _index, byte, bit) {
    return (byte & 1 << bit) >> bit;
}
/** @ignore */
function extension_setBool(bytes, index, value) {
    return value ?
        !!(bytes[index >> 3] |= (1 << (index % 8))) || true :
        !(bytes[index >> 3] &= ~(1 << (index % 8))) && false;
}
/** @ignore */
function extension_truncateBitmap(offset, length, bitmap) {
    const alignedSize = (bitmap.byteLength + 7) & ~7;
    if (offset > 0 || bitmap.byteLength < alignedSize) {
        const bytes = new Uint8Array(alignedSize);
        // If the offset is a multiple of 8 bits, it's safe to slice the bitmap
        bytes.set(offset % 8 === 0 ? bitmap.subarray(offset >> 3) :
            // Otherwise iterate each bit from the offset and return a new one
            extension_packBools(extension_iterateBits(bitmap, offset, length, null, extension_getBool)).subarray(0, alignedSize));
        return bytes;
    }
    return bitmap;
}
/** @ignore */
function extension_packBools(values) {
    let xs = [];
    let i = 0, bit = 0, byte = 0;
    for (const value of values) {
        value && (byte |= 1 << bit);
        if (++bit === 8) {
            xs[i++] = byte;
            byte = bit = 0;
        }
    }
    if (i === 0 || bit > 0) {
        xs[i++] = byte;
    }
    let b = new Uint8Array((xs.length + 7) & ~7);
    b.set(xs);
    return b;
}
/** @ignore */
function* extension_iterateBits(bytes, begin, length, context, get) {
    let bit = begin % 8;
    let byteIndex = begin >> 3;
    let index = 0, remaining = length;
    for (; remaining > 0; bit = 0) {
        let byte = bytes[byteIndex++];
        do {
            yield get(context, index++, byte, bit);
        } while (--remaining > 0 && ++bit < 8);
    }
}
/**
 * Compute the population count (the number of bits set to 1) for a range of bits in a Uint8Array.
 * @param vector The Uint8Array of bits for which to compute the population count.
 * @param lhs The range's left-hand side (or start) bit
 * @param rhs The range's right-hand side (or end) bit
 */
/** @ignore */
function extension_popcnt_bit_range(data, lhs, rhs) {
    if (rhs - lhs <= 0) {
        return 0;
    }
    // If the bit range is less than one byte, sum the 1 bits in the bit range
    if (rhs - lhs < 8) {
        let sum = 0;
        for (const bit of extension_iterateBits(data, lhs, rhs - lhs, data, extension_getBit)) {
            sum += bit;
        }
        return sum;
    }
    // Get the next lowest multiple of 8 from the right hand side
    const rhsInside = rhs >> 3 << 3;
    // Get the next highest multiple of 8 from the left hand side
    const lhsInside = lhs + (lhs % 8 === 0 ? 0 : 8 - lhs % 8);
    return (
    // Get the popcnt of bits between the left hand side, and the next highest multiple of 8
    extension_popcnt_bit_range(data, lhs, lhsInside) +
        // Get the popcnt of bits between the right hand side, and the next lowest multiple of 8
        extension_popcnt_bit_range(data, rhsInside, rhs) +
        // Get the popcnt of all bits between the left and right hand sides' multiples of 8
        extension_popcnt_array(data, lhsInside >> 3, (rhsInside - lhsInside) >> 3));
}
/** @ignore */
function extension_popcnt_array(arr, byteOffset, byteLength) {
    let cnt = 0, pos = byteOffset | 0;
    const view = new DataView(arr.buffer, arr.byteOffset, arr.byteLength);
    const len = byteLength === void 0 ? arr.byteLength : pos + byteLength;
    while (len - pos >= 4) {
        cnt += extension_popcnt_uint32(view.getUint32(pos));
        pos += 4;
    }
    while (len - pos >= 2) {
        cnt += extension_popcnt_uint32(view.getUint16(pos));
        pos += 2;
    }
    while (len - pos >= 1) {
        cnt += extension_popcnt_uint32(view.getUint8(pos));
        pos += 1;
    }
    return cnt;
}
/** @ignore */
function extension_popcnt_uint32(uint32) {
    let i = uint32 | 0;
    i = i - ((i >>> 1) & 0x55555555);
    i = (i & 0x33333333) + ((i >>> 2) & 0x33333333);
    return (((i + (i >>> 4)) & 0x0F0F0F0F) * 0x01010101) >>> 24;
}

//# sourceMappingURL=bit.mjs.map

;// ../../node_modules/apache-arrow/visitor.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




class extension_Visitor {
    visitMany(nodes, ...args) {
        return nodes.map((node, i) => this.visit(node, ...args.map((x) => x[i])));
    }
    visit(...args) {
        return this.getVisitFn(args[0], false).apply(this, args);
    }
    getVisitFn(node, throwIfNotFound = true) {
        return extension_getVisitFn(this, node, throwIfNotFound);
    }
    visitNull(_node, ..._args) { return null; }
    visitBool(_node, ..._args) { return null; }
    visitInt(_node, ..._args) { return null; }
    visitFloat(_node, ..._args) { return null; }
    visitUtf8(_node, ..._args) { return null; }
    visitBinary(_node, ..._args) { return null; }
    visitFixedSizeBinary(_node, ..._args) { return null; }
    visitDate(_node, ..._args) { return null; }
    visitTimestamp(_node, ..._args) { return null; }
    visitTime(_node, ..._args) { return null; }
    visitDecimal(_node, ..._args) { return null; }
    visitList(_node, ..._args) { return null; }
    visitStruct(_node, ..._args) { return null; }
    visitUnion(_node, ..._args) { return null; }
    visitDictionary(_node, ..._args) { return null; }
    visitInterval(_node, ..._args) { return null; }
    visitFixedSizeList(_node, ..._args) { return null; }
    visitMap(_node, ..._args) { return null; }
}
/** @ignore */
function extension_getVisitFn(visitor, node, throwIfNotFound = true) {
    let fn = null;
    let dtype = extension_Type.NONE;
    // tslint:disable
    if (node instanceof extension_Data) {
        dtype = extension_inferDType(node.type);
    }
    else if (node instanceof extension_AbstractVector) {
        dtype = extension_inferDType(node.type);
    }
    else if (node instanceof extension_DataType) {
        dtype = extension_inferDType(node);
    }
    else if (typeof (dtype = node) !== 'number') {
        dtype = extension_Type[node];
    }
    switch (dtype) {
        case extension_Type.Null:
            fn = visitor.visitNull;
            break;
        case extension_Type.Bool:
            fn = visitor.visitBool;
            break;
        case extension_Type.Int:
            fn = visitor.visitInt;
            break;
        case extension_Type.Int8:
            fn = visitor.visitInt8 || visitor.visitInt;
            break;
        case extension_Type.Int16:
            fn = visitor.visitInt16 || visitor.visitInt;
            break;
        case extension_Type.Int32:
            fn = visitor.visitInt32 || visitor.visitInt;
            break;
        case extension_Type.Int64:
            fn = visitor.visitInt64 || visitor.visitInt;
            break;
        case extension_Type.Uint8:
            fn = visitor.visitUint8 || visitor.visitInt;
            break;
        case extension_Type.Uint16:
            fn = visitor.visitUint16 || visitor.visitInt;
            break;
        case extension_Type.Uint32:
            fn = visitor.visitUint32 || visitor.visitInt;
            break;
        case extension_Type.Uint64:
            fn = visitor.visitUint64 || visitor.visitInt;
            break;
        case extension_Type.Float:
            fn = visitor.visitFloat;
            break;
        case extension_Type.Float16:
            fn = visitor.visitFloat16 || visitor.visitFloat;
            break;
        case extension_Type.Float32:
            fn = visitor.visitFloat32 || visitor.visitFloat;
            break;
        case extension_Type.Float64:
            fn = visitor.visitFloat64 || visitor.visitFloat;
            break;
        case extension_Type.Utf8:
            fn = visitor.visitUtf8;
            break;
        case extension_Type.Binary:
            fn = visitor.visitBinary;
            break;
        case extension_Type.FixedSizeBinary:
            fn = visitor.visitFixedSizeBinary;
            break;
        case extension_Type.Date:
            fn = visitor.visitDate;
            break;
        case extension_Type.DateDay:
            fn = visitor.visitDateDay || visitor.visitDate;
            break;
        case extension_Type.DateMillisecond:
            fn = visitor.visitDateMillisecond || visitor.visitDate;
            break;
        case extension_Type.Timestamp:
            fn = visitor.visitTimestamp;
            break;
        case extension_Type.TimestampSecond:
            fn = visitor.visitTimestampSecond || visitor.visitTimestamp;
            break;
        case extension_Type.TimestampMillisecond:
            fn = visitor.visitTimestampMillisecond || visitor.visitTimestamp;
            break;
        case extension_Type.TimestampMicrosecond:
            fn = visitor.visitTimestampMicrosecond || visitor.visitTimestamp;
            break;
        case extension_Type.TimestampNanosecond:
            fn = visitor.visitTimestampNanosecond || visitor.visitTimestamp;
            break;
        case extension_Type.Time:
            fn = visitor.visitTime;
            break;
        case extension_Type.TimeSecond:
            fn = visitor.visitTimeSecond || visitor.visitTime;
            break;
        case extension_Type.TimeMillisecond:
            fn = visitor.visitTimeMillisecond || visitor.visitTime;
            break;
        case extension_Type.TimeMicrosecond:
            fn = visitor.visitTimeMicrosecond || visitor.visitTime;
            break;
        case extension_Type.TimeNanosecond:
            fn = visitor.visitTimeNanosecond || visitor.visitTime;
            break;
        case extension_Type.Decimal:
            fn = visitor.visitDecimal;
            break;
        case extension_Type.List:
            fn = visitor.visitList;
            break;
        case extension_Type.Struct:
            fn = visitor.visitStruct;
            break;
        case extension_Type.Union:
            fn = visitor.visitUnion;
            break;
        case extension_Type.DenseUnion:
            fn = visitor.visitDenseUnion || visitor.visitUnion;
            break;
        case extension_Type.SparseUnion:
            fn = visitor.visitSparseUnion || visitor.visitUnion;
            break;
        case extension_Type.Dictionary:
            fn = visitor.visitDictionary;
            break;
        case extension_Type.Interval:
            fn = visitor.visitInterval;
            break;
        case extension_Type.IntervalDayTime:
            fn = visitor.visitIntervalDayTime || visitor.visitInterval;
            break;
        case extension_Type.IntervalYearMonth:
            fn = visitor.visitIntervalYearMonth || visitor.visitInterval;
            break;
        case extension_Type.FixedSizeList:
            fn = visitor.visitFixedSizeList;
            break;
        case extension_Type.Map:
            fn = visitor.visitMap;
            break;
    }
    if (typeof fn === 'function')
        return fn;
    if (!throwIfNotFound)
        return () => null;
    throw new Error(`Unrecognized type '${extension_Type[dtype]}'`);
}
/** @ignore */
function extension_inferDType(type) {
    switch (type.typeId) {
        case extension_Type.Null: return extension_Type.Null;
        case extension_Type.Int:
            const { bitWidth, isSigned } = type;
            switch (bitWidth) {
                case 8: return isSigned ? extension_Type.Int8 : extension_Type.Uint8;
                case 16: return isSigned ? extension_Type.Int16 : extension_Type.Uint16;
                case 32: return isSigned ? extension_Type.Int32 : extension_Type.Uint32;
                case 64: return isSigned ? extension_Type.Int64 : extension_Type.Uint64;
            }
            // @ts-ignore
            return extension_Type.Int;
        case extension_Type.Float:
            switch (type.precision) {
                case extension_Precision.HALF: return extension_Type.Float16;
                case extension_Precision.SINGLE: return extension_Type.Float32;
                case extension_Precision.DOUBLE: return extension_Type.Float64;
            }
            // @ts-ignore
            return extension_Type.Float;
        case extension_Type.Binary: return extension_Type.Binary;
        case extension_Type.Utf8: return extension_Type.Utf8;
        case extension_Type.Bool: return extension_Type.Bool;
        case extension_Type.Decimal: return extension_Type.Decimal;
        case extension_Type.Time:
            switch (type.unit) {
                case extension_TimeUnit.SECOND: return extension_Type.TimeSecond;
                case extension_TimeUnit.MILLISECOND: return extension_Type.TimeMillisecond;
                case extension_TimeUnit.MICROSECOND: return extension_Type.TimeMicrosecond;
                case extension_TimeUnit.NANOSECOND: return extension_Type.TimeNanosecond;
            }
            // @ts-ignore
            return extension_Type.Time;
        case extension_Type.Timestamp:
            switch (type.unit) {
                case extension_TimeUnit.SECOND: return extension_Type.TimestampSecond;
                case extension_TimeUnit.MILLISECOND: return extension_Type.TimestampMillisecond;
                case extension_TimeUnit.MICROSECOND: return extension_Type.TimestampMicrosecond;
                case extension_TimeUnit.NANOSECOND: return extension_Type.TimestampNanosecond;
            }
            // @ts-ignore
            return extension_Type.Timestamp;
        case extension_Type.Date:
            switch (type.unit) {
                case extension_DateUnit.DAY: return extension_Type.DateDay;
                case extension_DateUnit.MILLISECOND: return extension_Type.DateMillisecond;
            }
            // @ts-ignore
            return extension_Type.Date;
        case extension_Type.Interval:
            switch (type.unit) {
                case extension_IntervalUnit.DAY_TIME: return extension_Type.IntervalDayTime;
                case extension_IntervalUnit.YEAR_MONTH: return extension_Type.IntervalYearMonth;
            }
            // @ts-ignore
            return extension_Type.Interval;
        case extension_Type.Map: return extension_Type.Map;
        case extension_Type.List: return extension_Type.List;
        case extension_Type.Struct: return extension_Type.Struct;
        case extension_Type.Union:
            switch (type.mode) {
                case extension_UnionMode.Dense: return extension_Type.DenseUnion;
                case extension_UnionMode.Sparse: return extension_Type.SparseUnion;
            }
            // @ts-ignore
            return extension_Type.Union;
        case extension_Type.FixedSizeBinary: return extension_Type.FixedSizeBinary;
        case extension_Type.FixedSizeList: return extension_Type.FixedSizeList;
        case extension_Type.Dictionary: return extension_Type.Dictionary;
    }
    throw new Error(`Unrecognized type '${extension_Type[type.typeId]}'`);
}
// Add these here so they're picked up by the externs creator
// in the build, and closure-compiler doesn't minify them away
extension_Visitor.prototype.visitInt8 = null;
extension_Visitor.prototype.visitInt16 = null;
extension_Visitor.prototype.visitInt32 = null;
extension_Visitor.prototype.visitInt64 = null;
extension_Visitor.prototype.visitUint8 = null;
extension_Visitor.prototype.visitUint16 = null;
extension_Visitor.prototype.visitUint32 = null;
extension_Visitor.prototype.visitUint64 = null;
extension_Visitor.prototype.visitFloat16 = null;
extension_Visitor.prototype.visitFloat32 = null;
extension_Visitor.prototype.visitFloat64 = null;
extension_Visitor.prototype.visitDateDay = null;
extension_Visitor.prototype.visitDateMillisecond = null;
extension_Visitor.prototype.visitTimestampSecond = null;
extension_Visitor.prototype.visitTimestampMillisecond = null;
extension_Visitor.prototype.visitTimestampMicrosecond = null;
extension_Visitor.prototype.visitTimestampNanosecond = null;
extension_Visitor.prototype.visitTimeSecond = null;
extension_Visitor.prototype.visitTimeMillisecond = null;
extension_Visitor.prototype.visitTimeMicrosecond = null;
extension_Visitor.prototype.visitTimeNanosecond = null;
extension_Visitor.prototype.visitDenseUnion = null;
extension_Visitor.prototype.visitSparseUnion = null;
extension_Visitor.prototype.visitIntervalDayTime = null;
extension_Visitor.prototype.visitIntervalYearMonth = null;

//# sourceMappingURL=visitor.mjs.map

;// ../../node_modules/apache-arrow/visitor/typecomparator.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_TypeComparator extends extension_Visitor {
    compareSchemas(schema, other) {
        return (schema === other) || (other instanceof schema.constructor &&
            extension_instance.compareFields(schema.fields, other.fields));
    }
    compareFields(fields, others) {
        return (fields === others) || (Array.isArray(fields) &&
            Array.isArray(others) &&
            fields.length === others.length &&
            fields.every((f, i) => extension_instance.compareField(f, others[i])));
    }
    compareField(field, other) {
        return (field === other) || (other instanceof field.constructor &&
            field.name === other.name &&
            field.nullable === other.nullable &&
            extension_instance.visit(field.type, other.type));
    }
}
function extension_compareConstructor(type, other) {
    return other instanceof type.constructor;
}
function extension_compareAny(type, other) {
    return (type === other) || extension_compareConstructor(type, other);
}
function extension_compareInt(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.bitWidth === other.bitWidth &&
        type.isSigned === other.isSigned);
}
function extension_compareFloat(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.precision === other.precision);
}
function extension_compareFixedSizeBinary(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.byteWidth === other.byteWidth);
}
function extension_compareDate(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.unit === other.unit);
}
function extension_compareTimestamp(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.unit === other.unit &&
        type.timezone === other.timezone);
}
function extension_compareTime(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.unit === other.unit &&
        type.bitWidth === other.bitWidth);
}
function extension_compareList(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.children.length === other.children.length &&
        extension_instance.compareFields(type.children, other.children));
}
function extension_compareStruct(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.children.length === other.children.length &&
        extension_instance.compareFields(type.children, other.children));
}
function extension_compareUnion(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.mode === other.mode &&
        type.typeIds.every((x, i) => x === other.typeIds[i]) &&
        extension_instance.compareFields(type.children, other.children));
}
function extension_compareDictionary(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.id === other.id &&
        type.isOrdered === other.isOrdered &&
        extension_instance.visit(type.indices, other.indices) &&
        extension_instance.visit(type.dictionary, other.dictionary));
}
function extension_compareInterval(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.unit === other.unit);
}
function extension_compareFixedSizeList(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.listSize === other.listSize &&
        type.children.length === other.children.length &&
        extension_instance.compareFields(type.children, other.children));
}
function extension_compareMap(type, other) {
    return (type === other) || (extension_compareConstructor(type, other) &&
        type.keysSorted === other.keysSorted &&
        type.children.length === other.children.length &&
        extension_instance.compareFields(type.children, other.children));
}
extension_TypeComparator.prototype.visitNull = extension_compareAny;
extension_TypeComparator.prototype.visitBool = extension_compareAny;
extension_TypeComparator.prototype.visitInt = extension_compareInt;
extension_TypeComparator.prototype.visitInt8 = extension_compareInt;
extension_TypeComparator.prototype.visitInt16 = extension_compareInt;
extension_TypeComparator.prototype.visitInt32 = extension_compareInt;
extension_TypeComparator.prototype.visitInt64 = extension_compareInt;
extension_TypeComparator.prototype.visitUint8 = extension_compareInt;
extension_TypeComparator.prototype.visitUint16 = extension_compareInt;
extension_TypeComparator.prototype.visitUint32 = extension_compareInt;
extension_TypeComparator.prototype.visitUint64 = extension_compareInt;
extension_TypeComparator.prototype.visitFloat = extension_compareFloat;
extension_TypeComparator.prototype.visitFloat16 = extension_compareFloat;
extension_TypeComparator.prototype.visitFloat32 = extension_compareFloat;
extension_TypeComparator.prototype.visitFloat64 = extension_compareFloat;
extension_TypeComparator.prototype.visitUtf8 = extension_compareAny;
extension_TypeComparator.prototype.visitBinary = extension_compareAny;
extension_TypeComparator.prototype.visitFixedSizeBinary = extension_compareFixedSizeBinary;
extension_TypeComparator.prototype.visitDate = extension_compareDate;
extension_TypeComparator.prototype.visitDateDay = extension_compareDate;
extension_TypeComparator.prototype.visitDateMillisecond = extension_compareDate;
extension_TypeComparator.prototype.visitTimestamp = extension_compareTimestamp;
extension_TypeComparator.prototype.visitTimestampSecond = extension_compareTimestamp;
extension_TypeComparator.prototype.visitTimestampMillisecond = extension_compareTimestamp;
extension_TypeComparator.prototype.visitTimestampMicrosecond = extension_compareTimestamp;
extension_TypeComparator.prototype.visitTimestampNanosecond = extension_compareTimestamp;
extension_TypeComparator.prototype.visitTime = extension_compareTime;
extension_TypeComparator.prototype.visitTimeSecond = extension_compareTime;
extension_TypeComparator.prototype.visitTimeMillisecond = extension_compareTime;
extension_TypeComparator.prototype.visitTimeMicrosecond = extension_compareTime;
extension_TypeComparator.prototype.visitTimeNanosecond = extension_compareTime;
extension_TypeComparator.prototype.visitDecimal = extension_compareAny;
extension_TypeComparator.prototype.visitList = extension_compareList;
extension_TypeComparator.prototype.visitStruct = extension_compareStruct;
extension_TypeComparator.prototype.visitUnion = extension_compareUnion;
extension_TypeComparator.prototype.visitDenseUnion = extension_compareUnion;
extension_TypeComparator.prototype.visitSparseUnion = extension_compareUnion;
extension_TypeComparator.prototype.visitDictionary = extension_compareDictionary;
extension_TypeComparator.prototype.visitInterval = extension_compareInterval;
extension_TypeComparator.prototype.visitIntervalDayTime = extension_compareInterval;
extension_TypeComparator.prototype.visitIntervalYearMonth = extension_compareInterval;
extension_TypeComparator.prototype.visitFixedSizeList = extension_compareFixedSizeList;
extension_TypeComparator.prototype.visitMap = extension_compareMap;
/** @ignore */
const extension_instance = new extension_TypeComparator();

//# sourceMappingURL=typecomparator.mjs.map

;// ../../node_modules/apache-arrow/type.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/**
 * An abstract base class for classes that encapsulate metadata about each of
 * the logical types that Arrow can represent.
 */
class extension_DataType {
    /** @nocollapse */ static isNull(x) { return x && x.typeId === extension_Type.Null; }
    /** @nocollapse */ static isInt(x) { return x && x.typeId === extension_Type.Int; }
    /** @nocollapse */ static isFloat(x) { return x && x.typeId === extension_Type.Float; }
    /** @nocollapse */ static isBinary(x) { return x && x.typeId === extension_Type.Binary; }
    /** @nocollapse */ static isUtf8(x) { return x && x.typeId === extension_Type.Utf8; }
    /** @nocollapse */ static isBool(x) { return x && x.typeId === extension_Type.Bool; }
    /** @nocollapse */ static isDecimal(x) { return x && x.typeId === extension_Type.Decimal; }
    /** @nocollapse */ static isDate(x) { return x && x.typeId === extension_Type.Date; }
    /** @nocollapse */ static isTime(x) { return x && x.typeId === extension_Type.Time; }
    /** @nocollapse */ static isTimestamp(x) { return x && x.typeId === extension_Type.Timestamp; }
    /** @nocollapse */ static isInterval(x) { return x && x.typeId === extension_Type.Interval; }
    /** @nocollapse */ static isList(x) { return x && x.typeId === extension_Type.List; }
    /** @nocollapse */ static isStruct(x) { return x && x.typeId === extension_Type.Struct; }
    /** @nocollapse */ static isUnion(x) { return x && x.typeId === extension_Type.Union; }
    /** @nocollapse */ static isFixedSizeBinary(x) { return x && x.typeId === extension_Type.FixedSizeBinary; }
    /** @nocollapse */ static isFixedSizeList(x) { return x && x.typeId === extension_Type.FixedSizeList; }
    /** @nocollapse */ static isMap(x) { return x && x.typeId === extension_Type.Map; }
    /** @nocollapse */ static isDictionary(x) { return x && x.typeId === extension_Type.Dictionary; }
    get typeId() { return extension_Type.NONE; }
    compareTo(other) {
        return extension_instance.visit(this, other);
    }
}
extension_DataType[Symbol.toStringTag] = ((proto) => {
    proto.children = null;
    proto.ArrayType = Array;
    return proto[Symbol.toStringTag] = 'DataType';
})(extension_DataType.prototype);
/** @ignore */
class extension_Null extends extension_DataType {
    toString() { return `Null`; }
    get typeId() { return extension_Type.Null; }
}
extension_Null[Symbol.toStringTag] = ((proto) => {
    return proto[Symbol.toStringTag] = 'Null';
})(extension_Null.prototype);
/** @ignore */
class extension_Int_ extends extension_DataType {
    constructor(isSigned, bitWidth) {
        super();
        this.isSigned = isSigned;
        this.bitWidth = bitWidth;
    }
    get typeId() { return extension_Type.Int; }
    get ArrayType() {
        switch (this.bitWidth) {
            case 8: return this.isSigned ? Int8Array : Uint8Array;
            case 16: return this.isSigned ? Int16Array : Uint16Array;
            case 32: return this.isSigned ? Int32Array : Uint32Array;
            case 64: return this.isSigned ? Int32Array : Uint32Array;
        }
        throw new Error(`Unrecognized ${this[Symbol.toStringTag]} type`);
    }
    toString() { return `${this.isSigned ? `I` : `Ui`}nt${this.bitWidth}`; }
}
extension_Int_[Symbol.toStringTag] = ((proto) => {
    proto.isSigned = null;
    proto.bitWidth = null;
    return proto[Symbol.toStringTag] = 'Int';
})(extension_Int_.prototype);

/** @ignore */
class extension_Int8 extends extension_Int_ {
    constructor() { super(true, 8); }
}
/** @ignore */
class extension_Int16 extends extension_Int_ {
    constructor() { super(true, 16); }
}
/** @ignore */
class extension_Int32 extends extension_Int_ {
    constructor() { super(true, 32); }
}
/** @ignore */
class extension_Int64 extends extension_Int_ {
    constructor() { super(true, 64); }
}
/** @ignore */
class extension_Uint8 extends extension_Int_ {
    constructor() { super(false, 8); }
}
/** @ignore */
class extension_Uint16 extends extension_Int_ {
    constructor() { super(false, 16); }
}
/** @ignore */
class extension_Uint32 extends extension_Int_ {
    constructor() { super(false, 32); }
}
/** @ignore */
class extension_Uint64 extends extension_Int_ {
    constructor() { super(false, 64); }
}
Object.defineProperty(extension_Int8.prototype, 'ArrayType', { value: Int8Array });
Object.defineProperty(extension_Int16.prototype, 'ArrayType', { value: Int16Array });
Object.defineProperty(extension_Int32.prototype, 'ArrayType', { value: Int32Array });
Object.defineProperty(extension_Int64.prototype, 'ArrayType', { value: Int32Array });
Object.defineProperty(extension_Uint8.prototype, 'ArrayType', { value: Uint8Array });
Object.defineProperty(extension_Uint16.prototype, 'ArrayType', { value: Uint16Array });
Object.defineProperty(extension_Uint32.prototype, 'ArrayType', { value: Uint32Array });
Object.defineProperty(extension_Uint64.prototype, 'ArrayType', { value: Uint32Array });
/** @ignore */
class extension_Float extends extension_DataType {
    constructor(precision) {
        super();
        this.precision = precision;
    }
    get typeId() { return extension_Type.Float; }
    get ArrayType() {
        switch (this.precision) {
            case extension_Precision.HALF: return Uint16Array;
            case extension_Precision.SINGLE: return Float32Array;
            case extension_Precision.DOUBLE: return Float64Array;
        }
        // @ts-ignore
        throw new Error(`Unrecognized ${this[Symbol.toStringTag]} type`);
    }
    toString() { return `Float${(this.precision << 5) || 16}`; }
}
extension_Float[Symbol.toStringTag] = ((proto) => {
    proto.precision = null;
    return proto[Symbol.toStringTag] = 'Float';
})(extension_Float.prototype);
/** @ignore */
class extension_Float16 extends extension_Float {
    constructor() { super(extension_Precision.HALF); }
}
/** @ignore */
class extension_Float32 extends extension_Float {
    constructor() { super(extension_Precision.SINGLE); }
}
/** @ignore */
class extension_Float64 extends extension_Float {
    constructor() { super(extension_Precision.DOUBLE); }
}
Object.defineProperty(extension_Float16.prototype, 'ArrayType', { value: Uint16Array });
Object.defineProperty(extension_Float32.prototype, 'ArrayType', { value: Float32Array });
Object.defineProperty(extension_Float64.prototype, 'ArrayType', { value: Float64Array });
/** @ignore */
class extension_Binary extends extension_DataType {
    constructor() {
        super();
    }
    get typeId() { return extension_Type.Binary; }
    toString() { return `Binary`; }
}
extension_Binary[Symbol.toStringTag] = ((proto) => {
    proto.ArrayType = Uint8Array;
    return proto[Symbol.toStringTag] = 'Binary';
})(extension_Binary.prototype);
/** @ignore */
class extension_Utf8 extends extension_DataType {
    constructor() {
        super();
    }
    get typeId() { return extension_Type.Utf8; }
    toString() { return `Utf8`; }
}
extension_Utf8[Symbol.toStringTag] = ((proto) => {
    proto.ArrayType = Uint8Array;
    return proto[Symbol.toStringTag] = 'Utf8';
})(extension_Utf8.prototype);
/** @ignore */
class extension_Bool extends extension_DataType {
    constructor() {
        super();
    }
    get typeId() { return extension_Type.Bool; }
    toString() { return `Bool`; }
}
extension_Bool[Symbol.toStringTag] = ((proto) => {
    proto.ArrayType = Uint8Array;
    return proto[Symbol.toStringTag] = 'Bool';
})(extension_Bool.prototype);
/** @ignore */
class extension_Decimal extends extension_DataType {
    constructor(scale, precision) {
        super();
        this.scale = scale;
        this.precision = precision;
    }
    get typeId() { return extension_Type.Decimal; }
    toString() { return `Decimal[${this.precision}e${this.scale > 0 ? `+` : ``}${this.scale}]`; }
}
extension_Decimal[Symbol.toStringTag] = ((proto) => {
    proto.scale = null;
    proto.precision = null;
    proto.ArrayType = Uint32Array;
    return proto[Symbol.toStringTag] = 'Decimal';
})(extension_Decimal.prototype);
/** @ignore */
class extension_Date_ extends extension_DataType {
    constructor(unit) {
        super();
        this.unit = unit;
    }
    get typeId() { return extension_Type.Date; }
    toString() { return `Date${(this.unit + 1) * 32}<${extension_DateUnit[this.unit]}>`; }
}
extension_Date_[Symbol.toStringTag] = ((proto) => {
    proto.unit = null;
    proto.ArrayType = Int32Array;
    return proto[Symbol.toStringTag] = 'Date';
})(extension_Date_.prototype);
/** @ignore */
class extension_DateDay extends extension_Date_ {
    constructor() { super(extension_DateUnit.DAY); }
}
/** @ignore */
class extension_DateMillisecond extends extension_Date_ {
    constructor() { super(extension_DateUnit.MILLISECOND); }
}
/** @ignore */
class extension_Time_ extends extension_DataType {
    constructor(unit, bitWidth) {
        super();
        this.unit = unit;
        this.bitWidth = bitWidth;
    }
    get typeId() { return extension_Type.Time; }
    toString() { return `Time${this.bitWidth}<${extension_TimeUnit[this.unit]}>`; }
}
extension_Time_[Symbol.toStringTag] = ((proto) => {
    proto.unit = null;
    proto.bitWidth = null;
    proto.ArrayType = Int32Array;
    return proto[Symbol.toStringTag] = 'Time';
})(extension_Time_.prototype);

/** @ignore */
class extension_TimeSecond extends extension_Time_ {
    constructor() { super(extension_TimeUnit.SECOND, 32); }
}
/** @ignore */
class extension_TimeMillisecond extends extension_Time_ {
    constructor() { super(extension_TimeUnit.MILLISECOND, 32); }
}
/** @ignore */
class extension_TimeMicrosecond extends extension_Time_ {
    constructor() { super(extension_TimeUnit.MICROSECOND, 64); }
}
/** @ignore */
class extension_TimeNanosecond extends extension_Time_ {
    constructor() { super(extension_TimeUnit.NANOSECOND, 64); }
}
/** @ignore */
class extension_Timestamp_ extends extension_DataType {
    constructor(unit, timezone) {
        super();
        this.unit = unit;
        this.timezone = timezone;
    }
    get typeId() { return extension_Type.Timestamp; }
    toString() { return `Timestamp<${extension_TimeUnit[this.unit]}${this.timezone ? `, ${this.timezone}` : ``}>`; }
}
extension_Timestamp_[Symbol.toStringTag] = ((proto) => {
    proto.unit = null;
    proto.timezone = null;
    proto.ArrayType = Int32Array;
    return proto[Symbol.toStringTag] = 'Timestamp';
})(extension_Timestamp_.prototype);

/** @ignore */
class extension_TimestampSecond extends extension_Timestamp_ {
    constructor(timezone) { super(extension_TimeUnit.SECOND, timezone); }
}
/** @ignore */
class extension_TimestampMillisecond extends extension_Timestamp_ {
    constructor(timezone) { super(extension_TimeUnit.MILLISECOND, timezone); }
}
/** @ignore */
class extension_TimestampMicrosecond extends extension_Timestamp_ {
    constructor(timezone) { super(extension_TimeUnit.MICROSECOND, timezone); }
}
/** @ignore */
class extension_TimestampNanosecond extends extension_Timestamp_ {
    constructor(timezone) { super(extension_TimeUnit.NANOSECOND, timezone); }
}
/** @ignore */
class extension_Interval_ extends extension_DataType {
    constructor(unit) {
        super();
        this.unit = unit;
    }
    get typeId() { return extension_Type.Interval; }
    toString() { return `Interval<${extension_IntervalUnit[this.unit]}>`; }
}
extension_Interval_[Symbol.toStringTag] = ((proto) => {
    proto.unit = null;
    proto.ArrayType = Int32Array;
    return proto[Symbol.toStringTag] = 'Interval';
})(extension_Interval_.prototype);

/** @ignore */
class extension_IntervalDayTime extends extension_Interval_ {
    constructor() { super(extension_IntervalUnit.DAY_TIME); }
}
/** @ignore */
class extension_IntervalYearMonth extends extension_Interval_ {
    constructor() { super(extension_IntervalUnit.YEAR_MONTH); }
}
/** @ignore */
class extension_List extends extension_DataType {
    constructor(child) {
        super();
        this.children = [child];
    }
    get typeId() { return extension_Type.List; }
    toString() { return `List<${this.valueType}>`; }
    get valueType() { return this.children[0].type; }
    get valueField() { return this.children[0]; }
    get ArrayType() { return this.valueType.ArrayType; }
}
extension_List[Symbol.toStringTag] = ((proto) => {
    proto.children = null;
    return proto[Symbol.toStringTag] = 'List';
})(extension_List.prototype);
/** @ignore */
class extension_Struct extends extension_DataType {
    constructor(children) {
        super();
        this.children = children;
    }
    get typeId() { return extension_Type.Struct; }
    toString() { return `Struct<{${this.children.map((f) => `${f.name}:${f.type}`).join(`, `)}}>`; }
}
extension_Struct[Symbol.toStringTag] = ((proto) => {
    proto.children = null;
    return proto[Symbol.toStringTag] = 'Struct';
})(extension_Struct.prototype);
/** @ignore */
class extension_Union_ extends extension_DataType {
    constructor(mode, typeIds, children) {
        super();
        this.mode = mode;
        this.children = children;
        this.typeIds = typeIds = Int32Array.from(typeIds);
        this.typeIdToChildIndex = typeIds.reduce((typeIdToChildIndex, typeId, idx) => {
            return (typeIdToChildIndex[typeId] = idx) && typeIdToChildIndex || typeIdToChildIndex;
        }, Object.create(null));
    }
    get typeId() { return extension_Type.Union; }
    toString() {
        return `${this[Symbol.toStringTag]}<${this.children.map((x) => `${x.type}`).join(` | `)}>`;
    }
}
extension_Union_[Symbol.toStringTag] = ((proto) => {
    proto.mode = null;
    proto.typeIds = null;
    proto.children = null;
    proto.typeIdToChildIndex = null;
    proto.ArrayType = Int8Array;
    return proto[Symbol.toStringTag] = 'Union';
})(extension_Union_.prototype);

/** @ignore */
class extension_DenseUnion extends extension_Union_ {
    constructor(typeIds, children) {
        super(extension_UnionMode.Dense, typeIds, children);
    }
}
/** @ignore */
class extension_SparseUnion extends extension_Union_ {
    constructor(typeIds, children) {
        super(extension_UnionMode.Sparse, typeIds, children);
    }
}
/** @ignore */
class extension_FixedSizeBinary extends extension_DataType {
    constructor(byteWidth) {
        super();
        this.byteWidth = byteWidth;
    }
    get typeId() { return extension_Type.FixedSizeBinary; }
    toString() { return `FixedSizeBinary[${this.byteWidth}]`; }
}
extension_FixedSizeBinary[Symbol.toStringTag] = ((proto) => {
    proto.byteWidth = null;
    proto.ArrayType = Uint8Array;
    return proto[Symbol.toStringTag] = 'FixedSizeBinary';
})(extension_FixedSizeBinary.prototype);
/** @ignore */
class extension_FixedSizeList extends extension_DataType {
    constructor(listSize, child) {
        super();
        this.listSize = listSize;
        this.children = [child];
    }
    get typeId() { return extension_Type.FixedSizeList; }
    get valueType() { return this.children[0].type; }
    get valueField() { return this.children[0]; }
    get ArrayType() { return this.valueType.ArrayType; }
    toString() { return `FixedSizeList[${this.listSize}]<${this.valueType}>`; }
}
extension_FixedSizeList[Symbol.toStringTag] = ((proto) => {
    proto.children = null;
    proto.listSize = null;
    return proto[Symbol.toStringTag] = 'FixedSizeList';
})(extension_FixedSizeList.prototype);
/** @ignore */
class extension_Map_ extends extension_DataType {
    constructor(child, keysSorted = false) {
        super();
        this.children = [child];
        this.keysSorted = keysSorted;
    }
    get typeId() { return extension_Type.Map; }
    get keyType() { return this.children[0].type.children[0].type; }
    get valueType() { return this.children[0].type.children[1].type; }
    toString() { return `Map<{${this.children[0].type.children.map((f) => `${f.name}:${f.type}`).join(`, `)}}>`; }
}
extension_Map_[Symbol.toStringTag] = ((proto) => {
    proto.children = null;
    proto.keysSorted = null;
    return proto[Symbol.toStringTag] = 'Map_';
})(extension_Map_.prototype);
/** @ignore */
const extension_getId = ((atomicDictionaryId) => () => ++atomicDictionaryId)(-1);
/** @ignore */
class extension_type_Dictionary extends extension_DataType {
    constructor(dictionary, indices, id, isOrdered) {
        super();
        this.indices = indices;
        this.dictionary = dictionary;
        this.isOrdered = isOrdered || false;
        this.id = id == null ? extension_getId() : typeof id === 'number' ? id : id.low;
    }
    get typeId() { return extension_Type.Dictionary; }
    get children() { return this.dictionary.children; }
    get valueType() { return this.dictionary; }
    get ArrayType() { return this.dictionary.ArrayType; }
    toString() { return `Dictionary<${this.indices}, ${this.dictionary}>`; }
}
extension_type_Dictionary[Symbol.toStringTag] = ((proto) => {
    proto.id = null;
    proto.indices = null;
    proto.isOrdered = null;
    proto.dictionary = null;
    return proto[Symbol.toStringTag] = 'Dictionary';
})(extension_type_Dictionary.prototype);
/** @ignore */
function extension_strideForType(type) {
    let t = type;
    switch (type.typeId) {
        case extension_Type.Decimal: return 4;
        case extension_Type.Timestamp: return 2;
        case extension_Type.Date: return 1 + t.unit;
        case extension_Type.Interval: return 1 + t.unit;
        case extension_Type.Int: return 1 + +(t.bitWidth > 32);
        case extension_Type.Time: return 1 + +(t.bitWidth > 32);
        case extension_Type.FixedSizeList: return t.listSize;
        case extension_Type.FixedSizeBinary: return t.byteWidth;
        default: return 1;
    }
}

//# sourceMappingURL=type.mjs.map

;// ../../node_modules/apache-arrow/data.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.





/** @ignore */ const extension_kUnknownNullCount = -1;
/** @ignore */
class extension_Data {
    constructor(type, offset, length, nullCount, buffers, childData, dictionary) {
        this.type = type;
        this.dictionary = dictionary;
        this.offset = Math.floor(Math.max(offset || 0, 0));
        this.length = Math.floor(Math.max(length || 0, 0));
        this._nullCount = Math.floor(Math.max(nullCount || 0, -1));
        this.childData = (childData || []).map((x) => x instanceof extension_Data ? x : x.data);
        let buffer;
        if (buffers instanceof extension_Data) {
            this.stride = buffers.stride;
            this.values = buffers.values;
            this.typeIds = buffers.typeIds;
            this.nullBitmap = buffers.nullBitmap;
            this.valueOffsets = buffers.valueOffsets;
        }
        else {
            this.stride = extension_strideForType(type);
            if (buffers) {
                (buffer = buffers[0]) && (this.valueOffsets = buffer);
                (buffer = buffers[1]) && (this.values = buffer);
                (buffer = buffers[2]) && (this.nullBitmap = buffer);
                (buffer = buffers[3]) && (this.typeIds = buffer);
            }
        }
    }
    get typeId() { return this.type.typeId; }
    get ArrayType() { return this.type.ArrayType; }
    get buffers() {
        return [this.valueOffsets, this.values, this.nullBitmap, this.typeIds];
    }
    get byteLength() {
        let byteLength = 0;
        let { valueOffsets, values, nullBitmap, typeIds } = this;
        valueOffsets && (byteLength += valueOffsets.byteLength);
        values && (byteLength += values.byteLength);
        nullBitmap && (byteLength += nullBitmap.byteLength);
        typeIds && (byteLength += typeIds.byteLength);
        return this.childData.reduce((byteLength, child) => byteLength + child.byteLength, byteLength);
    }
    get nullCount() {
        let nullCount = this._nullCount;
        let nullBitmap;
        if (nullCount <= extension_kUnknownNullCount && (nullBitmap = this.nullBitmap)) {
            this._nullCount = nullCount = this.length - extension_popcnt_bit_range(nullBitmap, this.offset, this.offset + this.length);
        }
        return nullCount;
    }
    clone(type, offset = this.offset, length = this.length, nullCount = this._nullCount, buffers = this, childData = this.childData) {
        return new extension_Data(type, offset, length, nullCount, buffers, childData, this.dictionary);
    }
    slice(offset, length) {
        const { stride, typeId, childData } = this;
        // +true === 1, +false === 0, so this means
        // we keep nullCount at 0 if it's already 0,
        // otherwise set to the invalidated flag -1
        const nullCount = +(this._nullCount === 0) - 1;
        const childStride = typeId === 16 /* FixedSizeList */ ? stride : 1;
        const buffers = this._sliceBuffers(offset, length, stride, typeId);
        return this.clone(this.type, this.offset + offset, length, nullCount, buffers, 
        // Don't slice children if we have value offsets (the variable-width types)
        (!childData.length || this.valueOffsets) ? childData : this._sliceChildren(childData, childStride * offset, childStride * length));
    }
    _changeLengthAndBackfillNullBitmap(newLength) {
        if (this.typeId === extension_Type.Null) {
            return this.clone(this.type, 0, newLength, 0);
        }
        const { length, nullCount } = this;
        // start initialized with 0s (nulls), then fill from 0 to length with 1s (not null)
        const bitmap = new Uint8Array(((newLength + 63) & ~63) >> 3).fill(255, 0, length >> 3);
        // set all the bits in the last byte (up to bit `length - length % 8`) to 1 (not null)
        bitmap[length >> 3] = (1 << (length - (length & ~7))) - 1;
        // if we have a nullBitmap, truncate + slice and set it over the pre-filled 1s
        if (nullCount > 0) {
            bitmap.set(extension_truncateBitmap(this.offset, length, this.nullBitmap), 0);
        }
        const buffers = this.buffers;
        buffers[extension_BufferType.VALIDITY] = bitmap;
        return this.clone(this.type, 0, newLength, nullCount + (newLength - length), buffers);
    }
    _sliceBuffers(offset, length, stride, typeId) {
        let arr, { buffers } = this;
        // If typeIds exist, slice the typeIds buffer
        (arr = buffers[extension_BufferType.TYPE]) && (buffers[extension_BufferType.TYPE] = arr.subarray(offset, offset + length));
        // If offsets exist, only slice the offsets buffer
        (arr = buffers[extension_BufferType.OFFSET]) && (buffers[extension_BufferType.OFFSET] = arr.subarray(offset, offset + length + 1)) ||
            // Otherwise if no offsets, slice the data buffer. Don't slice the data vector for Booleans, since the offset goes by bits not bytes
            (arr = buffers[extension_BufferType.DATA]) && (buffers[extension_BufferType.DATA] = typeId === 6 ? arr : arr.subarray(stride * offset, stride * (offset + length)));
        return buffers;
    }
    _sliceChildren(childData, offset, length) {
        return childData.map((child) => child.slice(offset, length));
    }
    //
    // Convenience methods for creating Data instances for each of the Arrow Vector types
    //
    /** @nocollapse */
    static new(type, offset, length, nullCount, buffers, childData, dictionary) {
        if (buffers instanceof extension_Data) {
            buffers = buffers.buffers;
        }
        else if (!buffers) {
            buffers = [];
        }
        switch (type.typeId) {
            case extension_Type.Null: return extension_Data.Null(type, offset, length);
            case extension_Type.Int: return extension_Data.Int(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.DATA] || []);
            case extension_Type.Dictionary: return extension_Data.Dictionary(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.DATA] || [], dictionary);
            case extension_Type.Float: return extension_Data.Float(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.DATA] || []);
            case extension_Type.Bool: return extension_Data.Bool(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.DATA] || []);
            case extension_Type.Decimal: return extension_Data.Decimal(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.DATA] || []);
            case extension_Type.Date: return extension_Data.Date(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.DATA] || []);
            case extension_Type.Time: return extension_Data.Time(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.DATA] || []);
            case extension_Type.Timestamp: return extension_Data.Timestamp(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.DATA] || []);
            case extension_Type.Interval: return extension_Data.Interval(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.DATA] || []);
            case extension_Type.FixedSizeBinary: return extension_Data.FixedSizeBinary(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.DATA] || []);
            case extension_Type.Binary: return extension_Data.Binary(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.OFFSET] || [], buffers[extension_BufferType.DATA] || []);
            case extension_Type.Utf8: return extension_Data.Utf8(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.OFFSET] || [], buffers[extension_BufferType.DATA] || []);
            case extension_Type.List: return extension_Data.List(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.OFFSET] || [], (childData || [])[0]);
            case extension_Type.FixedSizeList: return extension_Data.FixedSizeList(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], (childData || [])[0]);
            case extension_Type.Struct: return extension_Data.Struct(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], childData || []);
            case extension_Type.Map: return extension_Data.Map(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.OFFSET] || [], (childData || [])[0]);
            case extension_Type.Union: return extension_Data.Union(type, offset, length, nullCount || 0, buffers[extension_BufferType.VALIDITY], buffers[extension_BufferType.TYPE] || [], buffers[extension_BufferType.OFFSET] || childData, childData);
        }
        throw new Error(`Unrecognized typeId ${type.typeId}`);
    }
    /** @nocollapse */
    static Null(type, offset, length) {
        return new extension_Data(type, offset, length, 0);
    }
    /** @nocollapse */
    static Int(type, offset, length, nullCount, nullBitmap, data) {
        return new extension_Data(type, offset, length, nullCount, [undefined, extension_toArrayBufferView(type.ArrayType, data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static Dictionary(type, offset, length, nullCount, nullBitmap, data, dictionary) {
        return new extension_Data(type, offset, length, nullCount, [undefined, extension_toArrayBufferView(type.indices.ArrayType, data), extension_toUint8Array(nullBitmap)], [], dictionary);
    }
    /** @nocollapse */
    static Float(type, offset, length, nullCount, nullBitmap, data) {
        return new extension_Data(type, offset, length, nullCount, [undefined, extension_toArrayBufferView(type.ArrayType, data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static Bool(type, offset, length, nullCount, nullBitmap, data) {
        return new extension_Data(type, offset, length, nullCount, [undefined, extension_toArrayBufferView(type.ArrayType, data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static Decimal(type, offset, length, nullCount, nullBitmap, data) {
        return new extension_Data(type, offset, length, nullCount, [undefined, extension_toArrayBufferView(type.ArrayType, data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static Date(type, offset, length, nullCount, nullBitmap, data) {
        return new extension_Data(type, offset, length, nullCount, [undefined, extension_toArrayBufferView(type.ArrayType, data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static Time(type, offset, length, nullCount, nullBitmap, data) {
        return new extension_Data(type, offset, length, nullCount, [undefined, extension_toArrayBufferView(type.ArrayType, data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static Timestamp(type, offset, length, nullCount, nullBitmap, data) {
        return new extension_Data(type, offset, length, nullCount, [undefined, extension_toArrayBufferView(type.ArrayType, data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static Interval(type, offset, length, nullCount, nullBitmap, data) {
        return new extension_Data(type, offset, length, nullCount, [undefined, extension_toArrayBufferView(type.ArrayType, data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static FixedSizeBinary(type, offset, length, nullCount, nullBitmap, data) {
        return new extension_Data(type, offset, length, nullCount, [undefined, extension_toArrayBufferView(type.ArrayType, data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static Binary(type, offset, length, nullCount, nullBitmap, valueOffsets, data) {
        return new extension_Data(type, offset, length, nullCount, [extension_toInt32Array(valueOffsets), extension_toUint8Array(data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static Utf8(type, offset, length, nullCount, nullBitmap, valueOffsets, data) {
        return new extension_Data(type, offset, length, nullCount, [extension_toInt32Array(valueOffsets), extension_toUint8Array(data), extension_toUint8Array(nullBitmap)]);
    }
    /** @nocollapse */
    static List(type, offset, length, nullCount, nullBitmap, valueOffsets, child) {
        return new extension_Data(type, offset, length, nullCount, [extension_toInt32Array(valueOffsets), undefined, extension_toUint8Array(nullBitmap)], child ? [child] : []);
    }
    /** @nocollapse */
    static FixedSizeList(type, offset, length, nullCount, nullBitmap, child) {
        return new extension_Data(type, offset, length, nullCount, [undefined, undefined, extension_toUint8Array(nullBitmap)], child ? [child] : []);
    }
    /** @nocollapse */
    static Struct(type, offset, length, nullCount, nullBitmap, children) {
        return new extension_Data(type, offset, length, nullCount, [undefined, undefined, extension_toUint8Array(nullBitmap)], children);
    }
    /** @nocollapse */
    static Map(type, offset, length, nullCount, nullBitmap, valueOffsets, child) {
        return new extension_Data(type, offset, length, nullCount, [extension_toInt32Array(valueOffsets), undefined, extension_toUint8Array(nullBitmap)], child ? [child] : []);
    }
    /** @nocollapse */
    static Union(type, offset, length, nullCount, nullBitmap, typeIds, valueOffsetsOrChildren, children) {
        const buffers = [
            undefined, undefined,
            extension_toUint8Array(nullBitmap),
            extension_toArrayBufferView(type.ArrayType, typeIds)
        ];
        if (type.mode === extension_UnionMode.Sparse) {
            return new extension_Data(type, offset, length, nullCount, buffers, valueOffsetsOrChildren);
        }
        buffers[extension_BufferType.OFFSET] = extension_toInt32Array(valueOffsetsOrChildren);
        return new extension_Data(type, offset, length, nullCount, buffers, children);
    }
}
extension_Data.prototype.childData = Object.freeze([]);

//# sourceMappingURL=data.mjs.map

;// ../../node_modules/apache-arrow/util/pretty.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
/** @ignore */ const extension_undf = void (0);
/** @ignore */
function extension_valueToString(x) {
    if (x === null) {
        return 'null';
    }
    if (x === extension_undf) {
        return 'undefined';
    }
    switch (typeof x) {
        case 'number': return `${x}`;
        case 'bigint': return `${x}`;
        case 'string': return `"${x}"`;
    }
    // If [Symbol.toPrimitive] is implemented (like in BN)
    // use it instead of JSON.stringify(). This ensures we
    // print BigInts, Decimals, and Binary in their native
    // representation
    if (typeof x[Symbol.toPrimitive] === 'function') {
        return x[Symbol.toPrimitive]('string');
    }
    return ArrayBuffer.isView(x) ? `[${x}]` : JSON.stringify(x);
}

//# sourceMappingURL=pretty.mjs.map

;// ../../node_modules/apache-arrow/builder/valid.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/**
 * Dynamically compile the null values into an `isValid()` function whose
 * implementation is a switch statement. Microbenchmarks in v8 indicate
 * this approach is 25% faster than using an ES6 Map.
 *
 * @example
 * console.log(createIsValidFunction([null, 'N/A', NaN]));
 * `function (x) {
 *     if (x !== x) return false;
 *     switch (x) {
 *         case null:
 *         case "N/A":
 *             return false;
 *     }
 *     return true;
 * }`
 *
 * @ignore
 * @param nullValues
 */
function extension_createIsValidFunction(nullValues) {
    if (!nullValues || nullValues.length <= 0) {
        // @ts-ignore
        return function isValid(value) { return true; };
    }
    let fnBody = '';
    let noNaNs = nullValues.filter((x) => x === x);
    if (noNaNs.length > 0) {
        fnBody = `
    switch (x) {${noNaNs.map((x) => `
        case ${extension_valueToCase(x)}:`).join('')}
            return false;
    }`;
    }
    // NaN doesn't equal anything including itself, so it doesn't work as a
    // switch case. Instead we must explicitly check for NaN before the switch.
    if (nullValues.length !== noNaNs.length) {
        fnBody = `if (x !== x) return false;\n${fnBody}`;
    }
    return new Function(`x`, `${fnBody}\nreturn true;`);
}
/** @ignore */
function extension_valueToCase(x) {
    if (typeof x !== 'bigint') {
        return extension_valueToString(x);
    }
    else if (extension_BigIntAvailable) {
        return `${extension_valueToString(x)}n`;
    }
    return `"${extension_valueToString(x)}"`;
}

//# sourceMappingURL=valid.mjs.map

;// ../../node_modules/apache-arrow/builder/buffer.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore */
const extension_roundLengthUpToNearest64Bytes = (len, BPE) => ((((len * BPE) + 63) & ~63) || 64) / BPE;
/** @ignore */
const extension_sliceOrExtendArray = (arr, len = 0) => (arr.length >= len ? arr.subarray(0, len) : extension_memcpy(new arr.constructor(len), arr, 0));
/** @ignore */
class extension_BufferBuilder {
    constructor(buffer, stride = 1) {
        this.buffer = buffer;
        this.stride = stride;
        this.BYTES_PER_ELEMENT = buffer.BYTES_PER_ELEMENT;
        this.ArrayType = buffer.constructor;
        this._resize(this.length = buffer.length / stride | 0);
    }
    get byteLength() { return this.length * this.stride * this.BYTES_PER_ELEMENT | 0; }
    get reservedLength() { return this.buffer.length / this.stride; }
    get reservedByteLength() { return this.buffer.byteLength; }
    // @ts-ignore
    set(index, value) { return this; }
    append(value) { return this.set(this.length, value); }
    reserve(extra) {
        if (extra > 0) {
            this.length += extra;
            const stride = this.stride;
            const length = this.length * stride;
            const reserved = this.buffer.length;
            if (length >= reserved) {
                this._resize(reserved === 0
                    ? extension_roundLengthUpToNearest64Bytes(length * 1, this.BYTES_PER_ELEMENT)
                    : extension_roundLengthUpToNearest64Bytes(length * 2, this.BYTES_PER_ELEMENT));
            }
        }
        return this;
    }
    flush(length = this.length) {
        length = extension_roundLengthUpToNearest64Bytes(length * this.stride, this.BYTES_PER_ELEMENT);
        const array = extension_sliceOrExtendArray(this.buffer, length);
        this.clear();
        return array;
    }
    clear() {
        this.length = 0;
        this._resize(0);
        return this;
    }
    _resize(newLength) {
        return this.buffer = extension_memcpy(new this.ArrayType(newLength), this.buffer);
    }
}
extension_BufferBuilder.prototype.offset = 0;
/** @ignore */
class extension_DataBufferBuilder extends extension_BufferBuilder {
    last() { return this.get(this.length - 1); }
    get(index) { return this.buffer[index]; }
    set(index, value) {
        this.reserve(index - this.length + 1);
        this.buffer[index * this.stride] = value;
        return this;
    }
}
/** @ignore */
class extension_BitmapBufferBuilder extends extension_DataBufferBuilder {
    constructor(data = new Uint8Array(0)) {
        super(data, 1 / 8);
        this.numValid = 0;
    }
    get numInvalid() { return this.length - this.numValid; }
    get(idx) { return this.buffer[idx >> 3] >> idx % 8 & 1; }
    set(idx, val) {
        const { buffer } = this.reserve(idx - this.length + 1);
        const byte = idx >> 3, bit = idx % 8, cur = buffer[byte] >> bit & 1;
        // If `val` is truthy and the current bit is 0, flip it to 1 and increment `numValid`.
        // If `val` is falsey and the current bit is 1, flip it to 0 and decrement `numValid`.
        val ? cur === 0 && ((buffer[byte] |= (1 << bit)), ++this.numValid)
            : cur === 1 && ((buffer[byte] &= ~(1 << bit)), --this.numValid);
        return this;
    }
    clear() {
        this.numValid = 0;
        return super.clear();
    }
}
/** @ignore */
class extension_OffsetsBufferBuilder extends extension_DataBufferBuilder {
    constructor(data = new Int32Array(1)) { super(data, 1); }
    append(value) {
        return this.set(this.length - 1, value);
    }
    set(index, value) {
        const offset = this.length - 1;
        const buffer = this.reserve(index - offset + 1).buffer;
        if (offset < index++) {
            buffer.fill(buffer[offset], offset, index);
        }
        buffer[index] = buffer[index - 1] + value;
        return this;
    }
    flush(length = this.length - 1) {
        if (length > this.length) {
            this.set(length - 1, 0);
        }
        return super.flush(length + 1);
    }
}
/** @ignore */
class extension_WideBufferBuilder extends extension_BufferBuilder {
    get ArrayType64() {
        return this._ArrayType64 || (this._ArrayType64 = (this.buffer instanceof Int32Array ? extension_BigInt64ArrayCtor : extension_BigUint64ArrayCtor));
    }
    set(index, value) {
        this.reserve(index - this.length + 1);
        switch (typeof value) {
            case 'bigint':
                this.buffer64[index] = value;
                break;
            case 'number':
                this.buffer[index * this.stride] = value;
                break;
            default: this.buffer.set(value, index * this.stride);
        }
        return this;
    }
    _resize(newLength) {
        const data = super._resize(newLength);
        const length = data.byteLength / (this.BYTES_PER_ELEMENT * this.stride);
        if (extension_BigIntAvailable) {
            this.buffer64 = new this.ArrayType64(data.buffer, data.byteOffset, length);
        }
        return data;
    }
}

//# sourceMappingURL=buffer.mjs.map

;// ../../node_modules/apache-arrow/builder.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.






/**
 * An abstract base class for types that construct Arrow Vectors from arbitrary JavaScript values.
 *
 * A `Builder` is responsible for writing arbitrary JavaScript values
 * to ArrayBuffers and/or child Builders according to the Arrow specification
 * for each DataType, creating or resizing the underlying ArrayBuffers as necessary.
 *
 * The `Builder` for each Arrow `DataType` handles converting and appending
 * values for a given `DataType`. The high-level {@link Builder.new `Builder.new()`} convenience
 * method creates the specific `Builder` subclass for the supplied `DataType`.
 *
 * Once created, `Builder` instances support both appending values to the end
 * of the `Builder`, and random-access writes to specific indices
 * (`Builder.prototype.append(value)` is a convenience method for
 * `builder.set(builder.length, value)`). Appending or setting values beyond the
 * Builder's current length may cause the builder to grow its underlying buffers
 * or child Builders (if applicable) to accommodate the new values.
 *
 * After enough values have been written to a `Builder`, `Builder.prototype.flush()`
 * will commit the values to the underlying ArrayBuffers (or child Builders). The
 * internal Builder state will be reset, and an instance of `Data<T>` is returned.
 * Alternatively, `Builder.prototype.toVector()` will flush the `Builder` and return
 * an instance of `Vector<T>` instead.
 *
 * When there are no more values to write, use `Builder.prototype.finish()` to
 * finalize the `Builder`. This does not reset the internal state, so it is
 * necessary to call `Builder.prototype.flush()` or `toVector()` one last time
 * if there are still values queued to be flushed.
 *
 * Note: calling `Builder.prototype.finish()` is required when using a `DictionaryBuilder`,
 * because this is when it flushes the values that have been enqueued in its internal
 * dictionary's `Builder`, and creates the `dictionaryVector` for the `Dictionary` `DataType`.
 *
 * ```ts
 * import { Builder, Utf8 } from 'apache-arrow';
 *
 * const utf8Builder = Builder.new({
 *     type: new Utf8(),
 *     nullValues: [null, 'n/a']
 * });
 *
 * utf8Builder
 *     .append('hello')
 *     .append('n/a')
 *     .append('world')
 *     .append(null);
 *
 * const utf8Vector = utf8Builder.finish().toVector();
 *
 * console.log(utf8Vector.toJSON());
 * // > ["hello", null, "world", null]
 * ```
 *
 * @typeparam T The `DataType` of this `Builder`.
 * @typeparam TNull The type(s) of values which will be considered null-value sentinels.
 */
class extension_Builder {
    /**
     * Construct a builder with the given Arrow DataType with optional null values,
     * which will be interpreted as "null" when set or appended to the `Builder`.
     * @param {{ type: T, nullValues?: any[] }} options A `BuilderOptions` object used to create this `Builder`.
     */
    constructor({ 'type': type, 'nullValues': nulls }) {
        /**
         * The number of values written to the `Builder` that haven't been flushed yet.
         * @readonly
         */
        this.length = 0;
        /**
         * A boolean indicating whether `Builder.prototype.finish()` has been called on this `Builder`.
         * @readonly
         */
        this.finished = false;
        this.type = type;
        this.children = [];
        this.nullValues = nulls;
        this.stride = extension_strideForType(type);
        this._nulls = new extension_BitmapBufferBuilder();
        if (nulls && nulls.length > 0) {
            this._isValid = extension_createIsValidFunction(nulls);
        }
    }
    /**
     * Create a `Builder` instance based on the `type` property of the supplied `options` object.
     * @param {BuilderOptions<T, TNull>} options An object with a required `DataType` instance
     * and other optional parameters to be passed to the `Builder` subclass for the given `type`.
     *
     * @typeparam T The `DataType` of the `Builder` to create.
     * @typeparam TNull The type(s) of values which will be considered null-value sentinels.
     * @nocollapse
     */
    // @ts-ignore
    static new(options) { }
    /** @nocollapse */
    // @ts-ignore
    static throughNode(options) {
        throw new Error(`"throughNode" not available in this environment`);
    }
    /** @nocollapse */
    // @ts-ignore
    static throughDOM(options) {
        throw new Error(`"throughDOM" not available in this environment`);
    }
    /**
     * Transform a synchronous `Iterable` of arbitrary JavaScript values into a
     * sequence of Arrow Vector<T> following the chunking semantics defined in
     * the supplied `options` argument.
     *
     * This function returns a function that accepts an `Iterable` of values to
     * transform. When called, this function returns an Iterator of `Vector<T>`.
     *
     * The resulting `Iterator<Vector<T>>` yields Vectors based on the
     * `queueingStrategy` and `highWaterMark` specified in the `options` argument.
     *
     * * If `queueingStrategy` is `"count"` (or omitted), The `Iterator<Vector<T>>`
     *   will flush the underlying `Builder` (and yield a new `Vector<T>`) once the
     *   Builder's `length` reaches or exceeds the supplied `highWaterMark`.
     * * If `queueingStrategy` is `"bytes"`, the `Iterator<Vector<T>>` will flush
     *   the underlying `Builder` (and yield a new `Vector<T>`) once its `byteLength`
     *   reaches or exceeds the supplied `highWaterMark`.
     *
     * @param {IterableBuilderOptions<T, TNull>} options An object of properties which determine the `Builder` to create and the chunking semantics to use.
     * @returns A function which accepts a JavaScript `Iterable` of values to
     *          write, and returns an `Iterator` that yields Vectors according
     *          to the chunking semantics defined in the `options` argument.
     * @nocollapse
     */
    static throughIterable(options) {
        return extension_throughIterable(options);
    }
    /**
     * Transform an `AsyncIterable` of arbitrary JavaScript values into a
     * sequence of Arrow Vector<T> following the chunking semantics defined in
     * the supplied `options` argument.
     *
     * This function returns a function that accepts an `AsyncIterable` of values to
     * transform. When called, this function returns an AsyncIterator of `Vector<T>`.
     *
     * The resulting `AsyncIterator<Vector<T>>` yields Vectors based on the
     * `queueingStrategy` and `highWaterMark` specified in the `options` argument.
     *
     * * If `queueingStrategy` is `"count"` (or omitted), The `AsyncIterator<Vector<T>>`
     *   will flush the underlying `Builder` (and yield a new `Vector<T>`) once the
     *   Builder's `length` reaches or exceeds the supplied `highWaterMark`.
     * * If `queueingStrategy` is `"bytes"`, the `AsyncIterator<Vector<T>>` will flush
     *   the underlying `Builder` (and yield a new `Vector<T>`) once its `byteLength`
     *   reaches or exceeds the supplied `highWaterMark`.
     *
     * @param {IterableBuilderOptions<T, TNull>} options An object of properties which determine the `Builder` to create and the chunking semantics to use.
     * @returns A function which accepts a JavaScript `AsyncIterable` of values
     *          to write, and returns an `AsyncIterator` that yields Vectors
     *          according to the chunking semantics defined in the `options`
     *          argument.
     * @nocollapse
     */
    static throughAsyncIterable(options) {
        return extension_throughAsyncIterable(options);
    }
    /**
     * Flush the `Builder` and return a `Vector<T>`.
     * @returns {Vector<T>} A `Vector<T>` of the flushed values.
     */
    toVector() { return extension_AbstractVector.new(this.flush()); }
    get ArrayType() { return this.type.ArrayType; }
    get nullCount() { return this._nulls.numInvalid; }
    get numChildren() { return this.children.length; }
    /**
     * @returns The aggregate length (in bytes) of the values that have been written.
     */
    get byteLength() {
        let size = 0;
        this._offsets && (size += this._offsets.byteLength);
        this._values && (size += this._values.byteLength);
        this._nulls && (size += this._nulls.byteLength);
        this._typeIds && (size += this._typeIds.byteLength);
        return this.children.reduce((size, child) => size + child.byteLength, size);
    }
    /**
     * @returns The aggregate number of rows that have been reserved to write new values.
     */
    get reservedLength() {
        return this._nulls.reservedLength;
    }
    /**
     * @returns The aggregate length (in bytes) that has been reserved to write new values.
     */
    get reservedByteLength() {
        let size = 0;
        this._offsets && (size += this._offsets.reservedByteLength);
        this._values && (size += this._values.reservedByteLength);
        this._nulls && (size += this._nulls.reservedByteLength);
        this._typeIds && (size += this._typeIds.reservedByteLength);
        return this.children.reduce((size, child) => size + child.reservedByteLength, size);
    }
    get valueOffsets() { return this._offsets ? this._offsets.buffer : null; }
    get values() { return this._values ? this._values.buffer : null; }
    get nullBitmap() { return this._nulls ? this._nulls.buffer : null; }
    get typeIds() { return this._typeIds ? this._typeIds.buffer : null; }
    /**
     * Appends a value (or null) to this `Builder`.
     * This is equivalent to `builder.set(builder.length, value)`.
     * @param {T['TValue'] | TNull } value The value to append.
     */
    append(value) { return this.set(this.length, value); }
    /**
     * Validates whether a value is valid (true), or null (false)
     * @param {T['TValue'] | TNull } value The value to compare against null the value representations
     */
    // @ts-ignore
    isValid(value) { return this._isValid(value); }
    /**
     * Write a value (or null-value sentinel) at the supplied index.
     * If the value matches one of the null-value representations, a 1-bit is
     * written to the null `BitmapBufferBuilder`. Otherwise, a 0 is written to
     * the null `BitmapBufferBuilder`, and the value is passed to
     * `Builder.prototype.setValue()`.
     * @param {number} index The index of the value to write.
     * @param {T['TValue'] | TNull } value The value to write at the supplied index.
     * @returns {this} The updated `Builder` instance.
     */
    set(index, value) {
        if (this.setValid(index, this.isValid(value))) {
            this.setValue(index, value);
        }
        return this;
    }
    /**
     * Write a value to the underlying buffers at the supplied index, bypassing
     * the null-value check. This is a low-level method that
     * @param {number} index
     * @param {T['TValue'] | TNull } value
     */
    // @ts-ignore
    setValue(index, value) { this._setValue(this, index, value); }
    setValid(index, valid) {
        this.length = this._nulls.set(index, +valid).length;
        return valid;
    }
    // @ts-ignore
    addChild(child, name = `${this.numChildren}`) {
        throw new Error(`Cannot append children to non-nested type "${this.type}"`);
    }
    /**
     * Retrieve the child `Builder` at the supplied `index`, or null if no child
     * exists at that index.
     * @param {number} index The index of the child `Builder` to retrieve.
     * @returns {Builder | null} The child Builder at the supplied index or null.
     */
    getChildAt(index) {
        return this.children[index] || null;
    }
    /**
     * Commit all the values that have been written to their underlying
     * ArrayBuffers, including any child Builders if applicable, and reset
     * the internal `Builder` state.
     * @returns A `Data<T>` of the buffers and childData representing the values written.
     */
    flush() {
        const buffers = [];
        const values = this._values;
        const offsets = this._offsets;
        const typeIds = this._typeIds;
        const { length, nullCount } = this;
        if (typeIds) { /* Unions */
            buffers[extension_BufferType.TYPE] = typeIds.flush(length);
            // DenseUnions
            offsets && (buffers[extension_BufferType.OFFSET] = offsets.flush(length));
        }
        else if (offsets) { /* Variable-width primitives (Binary, Utf8) and Lists */
            // Binary, Utf8
            values && (buffers[extension_BufferType.DATA] = values.flush(offsets.last()));
            buffers[extension_BufferType.OFFSET] = offsets.flush(length);
        }
        else if (values) { /* Fixed-width primitives (Int, Float, Decimal, Time, Timestamp, and Interval) */
            buffers[extension_BufferType.DATA] = values.flush(length);
        }
        nullCount > 0 && (buffers[extension_BufferType.VALIDITY] = this._nulls.flush(length));
        const data = extension_Data.new(this.type, 0, length, nullCount, buffers, this.children.map((child) => child.flush()));
        this.clear();
        return data;
    }
    /**
     * Finalize this `Builder`, and child builders if applicable.
     * @returns {this} The finalized `Builder` instance.
     */
    finish() {
        this.finished = true;
        this.children.forEach((child) => child.finish());
        return this;
    }
    /**
     * Clear this Builder's internal state, including child Builders if applicable, and reset the length to 0.
     * @returns {this} The cleared `Builder` instance.
     */
    clear() {
        this.length = 0;
        this._offsets && (this._offsets.clear());
        this._values && (this._values.clear());
        this._nulls && (this._nulls.clear());
        this._typeIds && (this._typeIds.clear());
        this.children.forEach((child) => child.clear());
        return this;
    }
}
extension_Builder.prototype.length = 1;
extension_Builder.prototype.stride = 1;
extension_Builder.prototype.children = null;
extension_Builder.prototype.finished = false;
extension_Builder.prototype.nullValues = null;
extension_Builder.prototype._isValid = () => true;
/** @ignore */
class extension_FixedWidthBuilder extends extension_Builder {
    constructor(opts) {
        super(opts);
        this._values = new extension_DataBufferBuilder(new this.ArrayType(0), this.stride);
    }
    setValue(index, value) {
        const values = this._values;
        values.reserve(index - values.length + 1);
        return super.setValue(index, value);
    }
}
/** @ignore */
class extension_VariableWidthBuilder extends extension_Builder {
    constructor(opts) {
        super(opts);
        this._pendingLength = 0;
        this._offsets = new extension_OffsetsBufferBuilder();
    }
    setValue(index, value) {
        const pending = this._pending || (this._pending = new Map());
        const current = pending.get(index);
        current && (this._pendingLength -= current.length);
        this._pendingLength += value.length;
        pending.set(index, value);
    }
    setValid(index, isValid) {
        if (!super.setValid(index, isValid)) {
            (this._pending || (this._pending = new Map())).set(index, undefined);
            return false;
        }
        return true;
    }
    clear() {
        this._pendingLength = 0;
        this._pending = undefined;
        return super.clear();
    }
    flush() {
        this._flush();
        return super.flush();
    }
    finish() {
        this._flush();
        return super.finish();
    }
    _flush() {
        const pending = this._pending;
        const pendingLength = this._pendingLength;
        this._pendingLength = 0;
        this._pending = undefined;
        if (pending && pending.size > 0) {
            this._flushPending(pending, pendingLength);
        }
        return this;
    }
}
/** @ignore */
function extension_throughIterable(options) {
    const { ['queueingStrategy']: queueingStrategy = 'count' } = options;
    const { ['highWaterMark']: highWaterMark = queueingStrategy !== 'bytes' ? 1000 : 2 ** 14 } = options;
    const sizeProperty = queueingStrategy !== 'bytes' ? 'length' : 'byteLength';
    return function* (source) {
        let numChunks = 0;
        let builder = extension_Builder.new(options);
        for (const value of source) {
            if (builder.append(value)[sizeProperty] >= highWaterMark) {
                ++numChunks && (yield builder.toVector());
            }
        }
        if (builder.finish().length > 0 || numChunks === 0) {
            yield builder.toVector();
        }
    };
}
/** @ignore */
function extension_throughAsyncIterable(options) {
    const { ['queueingStrategy']: queueingStrategy = 'count' } = options;
    const { ['highWaterMark']: highWaterMark = queueingStrategy !== 'bytes' ? 1000 : 2 ** 14 } = options;
    const sizeProperty = queueingStrategy !== 'bytes' ? 'length' : 'byteLength';
    return async function* (source) {
        let numChunks = 0;
        let builder = extension_Builder.new(options);
        for await (const value of source) {
            if (builder.append(value)[sizeProperty] >= highWaterMark) {
                ++numChunks && (yield builder.toVector());
            }
        }
        if (builder.finish().length > 0 || numChunks === 0) {
            yield builder.toVector();
        }
    };
}

//# sourceMappingURL=builder.mjs.map

;// ../../node_modules/apache-arrow/builder/bool.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore */
class extension_BoolBuilder extends extension_Builder {
    constructor(options) {
        super(options);
        this._values = new extension_BitmapBufferBuilder();
    }
    setValue(index, value) {
        this._values.set(index, +value);
    }
}

//# sourceMappingURL=bool.mjs.map

;// ../../node_modules/apache-arrow/builder/null.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_NullBuilder extends extension_Builder {
    // @ts-ignore
    setValue(index, value) { }
    setValid(index, valid) {
        this.length = Math.max(index + 1, this.length);
        return valid;
    }
}

//# sourceMappingURL=null.mjs.map

;// ../../node_modules/apache-arrow/builder/date.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_DateBuilder extends extension_FixedWidthBuilder {
}
/** @ignore */
class extension_DateDayBuilder extends extension_DateBuilder {
}
/** @ignore */
class extension_DateMillisecondBuilder extends extension_DateBuilder {
}

//# sourceMappingURL=date.mjs.map

;// ../../node_modules/apache-arrow/builder/decimal.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_DecimalBuilder extends extension_FixedWidthBuilder {
}

//# sourceMappingURL=decimal.mjs.map

;// ../../node_modules/apache-arrow/builder/dictionary.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore */
class extension_DictionaryBuilder extends extension_Builder {
    constructor({ 'type': type, 'nullValues': nulls, 'dictionaryHashFunction': hashFn }) {
        super({ type: new extension_type_Dictionary(type.dictionary, type.indices, type.id, type.isOrdered) });
        this._nulls = null;
        this._dictionaryOffset = 0;
        this._keysToIndices = Object.create(null);
        this.indices = extension_Builder.new({ 'type': this.type.indices, 'nullValues': nulls });
        this.dictionary = extension_Builder.new({ 'type': this.type.dictionary, 'nullValues': null });
        if (typeof hashFn === 'function') {
            this.valueToKey = hashFn;
        }
    }
    get values() { return this.indices.values; }
    get nullCount() { return this.indices.nullCount; }
    get nullBitmap() { return this.indices.nullBitmap; }
    get byteLength() { return this.indices.byteLength + this.dictionary.byteLength; }
    get reservedLength() { return this.indices.reservedLength + this.dictionary.reservedLength; }
    get reservedByteLength() { return this.indices.reservedByteLength + this.dictionary.reservedByteLength; }
    isValid(value) { return this.indices.isValid(value); }
    setValid(index, valid) {
        const indices = this.indices;
        valid = indices.setValid(index, valid);
        this.length = indices.length;
        return valid;
    }
    setValue(index, value) {
        let keysToIndices = this._keysToIndices;
        let key = this.valueToKey(value);
        let idx = keysToIndices[key];
        if (idx === undefined) {
            keysToIndices[key] = idx = this._dictionaryOffset + this.dictionary.append(value).length - 1;
        }
        return this.indices.setValue(index, idx);
    }
    flush() {
        const type = this.type;
        const prev = this._dictionary;
        const curr = this.dictionary.toVector();
        const data = this.indices.flush().clone(type);
        data.dictionary = prev ? prev.concat(curr) : curr;
        this.finished || (this._dictionaryOffset += curr.length);
        this._dictionary = data.dictionary;
        this.clear();
        return data;
    }
    finish() {
        this.indices.finish();
        this.dictionary.finish();
        this._dictionaryOffset = 0;
        this._keysToIndices = Object.create(null);
        return super.finish();
    }
    clear() {
        this.indices.clear();
        this.dictionary.clear();
        return super.clear();
    }
    valueToKey(val) {
        return typeof val === 'string' ? val : `${val}`;
    }
}

//# sourceMappingURL=dictionary.mjs.map

;// ../../node_modules/apache-arrow/builder/fixedsizebinary.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_FixedSizeBinaryBuilder extends extension_FixedWidthBuilder {
}

//# sourceMappingURL=fixedsizebinary.mjs.map

;// ../../node_modules/apache-arrow/util/math.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
const extension_f64 = new Float64Array(1);
const extension_u32 = new Uint32Array(extension_f64.buffer);
/**
 * Convert uint16 (logically a float16) to a JS float64. Inspired by numpy's `npy_half_to_double`:
 * https://github.com/numpy/numpy/blob/5a5987291dc95376bb098be8d8e5391e89e77a2c/numpy/core/src/npymath/halffloat.c#L29
 * @param h {number} the uint16 to convert
 * @private
 * @ignore
 */
function extension_uint16ToFloat64(h) {
    let expo = (h & 0x7C00) >> 10;
    let sigf = (h & 0x03FF) / 1024;
    let sign = (-1) ** ((h & 0x8000) >> 15);
    switch (expo) {
        case 0x1F: return sign * (sigf ? NaN : 1 / 0);
        case 0x00: return sign * (sigf ? 6.103515625e-5 * sigf : 0);
    }
    return sign * (2 ** (expo - 15)) * (1 + sigf);
}
/**
 * Convert a float64 to uint16 (assuming the float64 is logically a float16). Inspired by numpy's `npy_double_to_half`:
 * https://github.com/numpy/numpy/blob/5a5987291dc95376bb098be8d8e5391e89e77a2c/numpy/core/src/npymath/halffloat.c#L43
 * @param d {number} The float64 to convert
 * @private
 * @ignore
 */
function extension_float64ToUint16(d) {
    if (d !== d) {
        return 0x7E00;
    } // NaN
    extension_f64[0] = d;
    // Magic numbers:
    // 0x80000000 = 10000000 00000000 00000000 00000000 -- masks the 32nd bit
    // 0x7ff00000 = 01111111 11110000 00000000 00000000 -- masks the 21st-31st bits
    // 0x000fffff = 00000000 00001111 11111111 11111111 -- masks the 1st-20th bit
    let sign = (extension_u32[1] & 0x80000000) >> 16 & 0xFFFF;
    let expo = (extension_u32[1] & 0x7ff00000), sigf = 0x0000;
    if (expo >= 0x40f00000) {
        //
        // If exponent overflowed, the float16 is either NaN or Infinity.
        // Rules to propagate the sign bit: mantissa > 0 ? NaN : +/-Infinity
        //
        // Magic numbers:
        // 0x40F00000 = 01000000 11110000 00000000 00000000 -- 6-bit exponent overflow
        // 0x7C000000 = 01111100 00000000 00000000 00000000 -- masks the 27th-31st bits
        //
        // returns:
        // qNaN, aka 32256 decimal, 0x7E00 hex, or 01111110 00000000 binary
        // sNaN, aka 32000 decimal, 0x7D00 hex, or 01111101 00000000 binary
        // +inf, aka 31744 decimal, 0x7C00 hex, or 01111100 00000000 binary
        // -inf, aka 64512 decimal, 0xFC00 hex, or 11111100 00000000 binary
        //
        // If mantissa is greater than 23 bits, set to +Infinity like numpy
        if (extension_u32[0] > 0) {
            expo = 0x7C00;
        }
        else {
            expo = (expo & 0x7C000000) >> 16;
            sigf = (extension_u32[1] & 0x000fffff) >> 10;
        }
    }
    else if (expo <= 0x3f000000) {
        //
        // If exponent underflowed, the float is either signed zero or subnormal.
        //
        // Magic numbers:
        // 0x3F000000 = 00111111 00000000 00000000 00000000 -- 6-bit exponent underflow
        //
        sigf = 0x100000 + (extension_u32[1] & 0x000fffff);
        sigf = 0x100000 + (sigf << ((expo >> 20) - 998)) >> 21;
        expo = 0;
    }
    else {
        //
        // No overflow or underflow, rebase the exponent and round the mantissa
        // Magic numbers:
        // 0x200 = 00000010 00000000 -- masks off the 10th bit
        //
        // Ensure the first mantissa bit (the 10th one) is 1 and round
        expo = (expo - 0x3f000000) >> 10;
        sigf = ((extension_u32[1] & 0x000fffff) + 0x200) >> 10;
    }
    return sign | expo | sigf & 0xFFFF;
}

//# sourceMappingURL=math.mjs.map

;// ../../node_modules/apache-arrow/builder/float.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore */
class extension_FloatBuilder extends extension_FixedWidthBuilder {
}
/** @ignore */
class extension_Float16Builder extends extension_FloatBuilder {
    setValue(index, value) {
        // convert JS float64 to a uint16
        this._values.set(index, extension_float64ToUint16(value));
    }
}
/** @ignore */
class extension_Float32Builder extends extension_FloatBuilder {
    setValue(index, value) {
        this._values.set(index, value);
    }
}
/** @ignore */
class extension_Float64Builder extends extension_FloatBuilder {
    setValue(index, value) {
        this._values.set(index, value);
    }
}

//# sourceMappingURL=float.mjs.map

;// ../../node_modules/apache-arrow/util/bn.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore */
const extension_isArrowBigNumSymbol = Symbol.for('isArrowBigNum');
/** @ignore */
function extension_BigNum(x, ...xs) {
    if (xs.length === 0) {
        return Object.setPrototypeOf(extension_toArrayBufferView(this['TypedArray'], x), this.constructor.prototype);
    }
    return Object.setPrototypeOf(new this['TypedArray'](x, ...xs), this.constructor.prototype);
}
extension_BigNum.prototype[extension_isArrowBigNumSymbol] = true;
extension_BigNum.prototype.toJSON = function () { return `"${extension_bignumToString(this)}"`; };
extension_BigNum.prototype.valueOf = function () { return extension_bignumToNumber(this); };
extension_BigNum.prototype.toString = function () { return extension_bignumToString(this); };
extension_BigNum.prototype[Symbol.toPrimitive] = function (hint = 'default') {
    switch (hint) {
        case 'number': return extension_bignumToNumber(this);
        case 'string': return extension_bignumToString(this);
        case 'default': return extension_bignumToBigInt(this);
    }
    // @ts-ignore
    return extension_bignumToString(this);
};
/** @ignore */
function extension_SignedBigNum(...args) { return extension_BigNum.apply(this, args); }
/** @ignore */
function extension_UnsignedBigNum(...args) { return extension_BigNum.apply(this, args); }
/** @ignore */
function extension_DecimalBigNum(...args) { return extension_BigNum.apply(this, args); }
Object.setPrototypeOf(extension_SignedBigNum.prototype, Object.create(Int32Array.prototype));
Object.setPrototypeOf(extension_UnsignedBigNum.prototype, Object.create(Uint32Array.prototype));
Object.setPrototypeOf(extension_DecimalBigNum.prototype, Object.create(Uint32Array.prototype));
Object.assign(extension_SignedBigNum.prototype, extension_BigNum.prototype, { 'constructor': extension_SignedBigNum, 'signed': true, 'TypedArray': Int32Array, 'BigIntArray': extension_BigInt64ArrayCtor });
Object.assign(extension_UnsignedBigNum.prototype, extension_BigNum.prototype, { 'constructor': extension_UnsignedBigNum, 'signed': false, 'TypedArray': Uint32Array, 'BigIntArray': extension_BigUint64ArrayCtor });
Object.assign(extension_DecimalBigNum.prototype, extension_BigNum.prototype, { 'constructor': extension_DecimalBigNum, 'signed': true, 'TypedArray': Uint32Array, 'BigIntArray': extension_BigUint64ArrayCtor });
/** @ignore */
function extension_bignumToNumber(bn) {
    let { buffer, byteOffset, length, 'signed': signed } = bn;
    let words = new Int32Array(buffer, byteOffset, length);
    let number = 0, i = 0, n = words.length, hi, lo;
    while (i < n) {
        lo = words[i++];
        hi = words[i++];
        signed || (hi = hi >>> 0);
        number += (lo >>> 0) + (hi * (i ** 32));
    }
    return number;
}
/** @ignore */
let extension_bignumToString;
/** @ignore */
let extension_bignumToBigInt;
if (!extension_BigIntAvailable) {
    extension_bignumToString = extension_decimalToString;
    extension_bignumToBigInt = extension_bignumToString;
}
else {
    extension_bignumToBigInt = ((a) => a.byteLength === 8 ? new a['BigIntArray'](a.buffer, a.byteOffset, 1)[0] : extension_decimalToString(a));
    extension_bignumToString = ((a) => a.byteLength === 8 ? `${new a['BigIntArray'](a.buffer, a.byteOffset, 1)[0]}` : extension_decimalToString(a));
}
/** @ignore */
function extension_decimalToString(a) {
    let digits = '';
    let base64 = new Uint32Array(2);
    let base32 = new Uint16Array(a.buffer, a.byteOffset, a.byteLength / 2);
    let checks = new Uint32Array((base32 = new Uint16Array(base32).reverse()).buffer);
    let i = -1, n = base32.length - 1;
    do {
        for (base64[0] = base32[i = 0]; i < n;) {
            base32[i++] = base64[1] = base64[0] / 10;
            base64[0] = ((base64[0] - base64[1] * 10) << 16) + base32[i];
        }
        base32[i] = base64[1] = base64[0] / 10;
        base64[0] = base64[0] - base64[1] * 10;
        digits = `${base64[0]}${digits}`;
    } while (checks[0] || checks[1] || checks[2] || checks[3]);
    return digits ? digits : `0`;
}
/** @ignore */
class extension_BN {
    /** @nocollapse */
    static new(num, isSigned) {
        switch (isSigned) {
            case true: return new extension_SignedBigNum(num);
            case false: return new extension_UnsignedBigNum(num);
        }
        switch (num.constructor) {
            case Int8Array:
            case Int16Array:
            case Int32Array:
            case extension_BigInt64ArrayCtor:
                return new extension_SignedBigNum(num);
        }
        if (num.byteLength === 16) {
            return new extension_DecimalBigNum(num);
        }
        return new extension_UnsignedBigNum(num);
    }
    /** @nocollapse */
    static signed(num) {
        return new extension_SignedBigNum(num);
    }
    /** @nocollapse */
    static unsigned(num) {
        return new extension_UnsignedBigNum(num);
    }
    /** @nocollapse */
    static decimal(num) {
        return new extension_DecimalBigNum(num);
    }
    constructor(num, isSigned) {
        return extension_BN.new(num, isSigned);
    }
}

//# sourceMappingURL=bn.mjs.map

;// ../../node_modules/apache-arrow/builder/int.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
class extension_IntBuilder extends extension_FixedWidthBuilder {
    setValue(index, value) {
        this._values.set(index, value);
    }
}
/** @ignore */
class extension_Int8Builder extends extension_IntBuilder {
}
/** @ignore */
class extension_Int16Builder extends extension_IntBuilder {
}
/** @ignore */
class extension_Int32Builder extends extension_IntBuilder {
}
/** @ignore */
class extension_Int64Builder extends extension_IntBuilder {
    constructor(options) {
        if (options['nullValues']) {
            options['nullValues'] = options['nullValues'].map(extension_toBigInt);
        }
        super(options);
        this._values = new extension_WideBufferBuilder(new Int32Array(0), 2);
    }
    get values64() { return this._values.buffer64; }
    isValid(value) { return super.isValid(extension_toBigInt(value)); }
}
/** @ignore */
class extension_Uint8Builder extends extension_IntBuilder {
}
/** @ignore */
class extension_Uint16Builder extends extension_IntBuilder {
}
/** @ignore */
class extension_Uint32Builder extends extension_IntBuilder {
}
/** @ignore */
class extension_Uint64Builder extends extension_IntBuilder {
    constructor(options) {
        if (options['nullValues']) {
            options['nullValues'] = options['nullValues'].map(extension_toBigInt);
        }
        super(options);
        this._values = new extension_WideBufferBuilder(new Uint32Array(0), 2);
    }
    get values64() { return this._values.buffer64; }
    isValid(value) { return super.isValid(extension_toBigInt(value)); }
}
const extension_toBigInt = ((memo) => (value) => {
    if (ArrayBuffer.isView(value)) {
        memo.buffer = value.buffer;
        memo.byteOffset = value.byteOffset;
        memo.byteLength = value.byteLength;
        value = extension_bignumToBigInt(memo);
        memo.buffer = null;
    }
    return value;
})({ 'BigIntArray': extension_BigInt64ArrayCtor });

//# sourceMappingURL=int.mjs.map

;// ../../node_modules/apache-arrow/builder/time.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_TimeBuilder extends extension_FixedWidthBuilder {
}
/** @ignore */
class extension_TimeSecondBuilder extends extension_TimeBuilder {
}
/** @ignore */
class extension_TimeMillisecondBuilder extends extension_TimeBuilder {
}
/** @ignore */
class extension_TimeMicrosecondBuilder extends extension_TimeBuilder {
}
/** @ignore */
class extension_TimeNanosecondBuilder extends extension_TimeBuilder {
}

//# sourceMappingURL=time.mjs.map

;// ../../node_modules/apache-arrow/builder/timestamp.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_TimestampBuilder extends extension_FixedWidthBuilder {
}
/** @ignore */
class extension_TimestampSecondBuilder extends extension_TimestampBuilder {
}
/** @ignore */
class extension_TimestampMillisecondBuilder extends extension_TimestampBuilder {
}
/** @ignore */
class extension_TimestampMicrosecondBuilder extends extension_TimestampBuilder {
}
/** @ignore */
class extension_TimestampNanosecondBuilder extends extension_TimestampBuilder {
}

//# sourceMappingURL=timestamp.mjs.map

;// ../../node_modules/apache-arrow/builder/interval.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_IntervalBuilder extends extension_FixedWidthBuilder {
}
/** @ignore */
class extension_IntervalDayTimeBuilder extends extension_IntervalBuilder {
}
/** @ignore */
class extension_IntervalYearMonthBuilder extends extension_IntervalBuilder {
}

//# sourceMappingURL=interval.mjs.map

;// ../../node_modules/apache-arrow/builder/binary.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.



/** @ignore */
class extension_BinaryBuilder extends extension_VariableWidthBuilder {
    constructor(opts) {
        super(opts);
        this._values = new extension_BufferBuilder(new Uint8Array(0));
    }
    get byteLength() {
        let size = this._pendingLength + (this.length * 4);
        this._offsets && (size += this._offsets.byteLength);
        this._values && (size += this._values.byteLength);
        this._nulls && (size += this._nulls.byteLength);
        return size;
    }
    setValue(index, value) {
        return super.setValue(index, extension_toUint8Array(value));
    }
    _flushPending(pending, pendingLength) {
        const offsets = this._offsets;
        const data = this._values.reserve(pendingLength).buffer;
        let index = 0, length = 0, offset = 0, value;
        for ([index, value] of pending) {
            if (value === undefined) {
                offsets.set(index, 0);
            }
            else {
                length = value.length;
                data.set(value, offset);
                offsets.set(index, length);
                offset += length;
            }
        }
    }
}

//# sourceMappingURL=binary.mjs.map

;// ../../node_modules/apache-arrow/builder/utf8.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
class extension_Utf8Builder extends extension_VariableWidthBuilder {
    constructor(opts) {
        super(opts);
        this._values = new extension_BufferBuilder(new Uint8Array(0));
    }
    get byteLength() {
        let size = this._pendingLength + (this.length * 4);
        this._offsets && (size += this._offsets.byteLength);
        this._values && (size += this._values.byteLength);
        this._nulls && (size += this._nulls.byteLength);
        return size;
    }
    setValue(index, value) {
        return super.setValue(index, extension_encodeUtf8(value));
    }
    // @ts-ignore
    _flushPending(pending, pendingLength) { }
}
extension_Utf8Builder.prototype._flushPending = extension_BinaryBuilder.prototype._flushPending;

//# sourceMappingURL=utf8.mjs.map

;// ../../node_modules/apache-arrow/builder/run.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_Run {
    get length() { return this._values.length; }
    get(index) { return this._values[index]; }
    clear() { this._values = null; return this; }
    bind(values) {
        if (values instanceof extension_AbstractVector) {
            return values;
        }
        this._values = values;
        return this;
    }
}

//# sourceMappingURL=run.mjs.map

;// ../../node_modules/apache-arrow/vector/row.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */ const extension_kParent = Symbol.for('parent');
/** @ignore */ const extension_kRowIndex = Symbol.for('rowIndex');
/** @ignore */ const extension_kKeyToIdx = Symbol.for('keyToIdx');
/** @ignore */ const extension_kIdxToVal = Symbol.for('idxToVal');
/** @ignore */ const extension_kCustomInspect = Symbol.for('nodejs.util.inspect.custom');
class extension_Row {
    constructor(parent, numKeys) {
        this[extension_kParent] = parent;
        this.size = numKeys;
    }
    entries() { return this[Symbol.iterator](); }
    has(key) { return this.get(key) !== undefined; }
    get(key) {
        let val = undefined;
        if (key !== null && key !== undefined) {
            const ktoi = this[extension_kKeyToIdx] || (this[extension_kKeyToIdx] = new Map());
            let idx = ktoi.get(key);
            if (idx !== undefined) {
                const itov = this[extension_kIdxToVal] || (this[extension_kIdxToVal] = new Array(this.size));
                ((val = itov[idx]) !== undefined) || (itov[idx] = val = this.getValue(idx));
            }
            else if ((idx = this.getIndex(key)) > -1) {
                ktoi.set(key, idx);
                const itov = this[extension_kIdxToVal] || (this[extension_kIdxToVal] = new Array(this.size));
                ((val = itov[idx]) !== undefined) || (itov[idx] = val = this.getValue(idx));
            }
        }
        return val;
    }
    set(key, val) {
        if (key !== null && key !== undefined) {
            const ktoi = this[extension_kKeyToIdx] || (this[extension_kKeyToIdx] = new Map());
            let idx = ktoi.get(key);
            if (idx === undefined) {
                ktoi.set(key, idx = this.getIndex(key));
            }
            if (idx > -1) {
                const itov = this[extension_kIdxToVal] || (this[extension_kIdxToVal] = new Array(this.size));
                itov[idx] = this.setValue(idx, val);
            }
        }
        return this;
    }
    clear() { throw new Error(`Clearing ${this[Symbol.toStringTag]} not supported.`); }
    delete(_) { throw new Error(`Deleting ${this[Symbol.toStringTag]} values not supported.`); }
    *[Symbol.iterator]() {
        const ki = this.keys();
        const vi = this.values();
        const ktoi = this[extension_kKeyToIdx] || (this[extension_kKeyToIdx] = new Map());
        const itov = this[extension_kIdxToVal] || (this[extension_kIdxToVal] = new Array(this.size));
        for (let k, v, i = 0, kr, vr; !((kr = ki.next()).done || (vr = vi.next()).done); ++i) {
            k = kr.value;
            v = vr.value;
            itov[i] = v;
            ktoi.has(k) || ktoi.set(k, i);
            yield [k, v];
        }
    }
    forEach(callbackfn, thisArg) {
        const ki = this.keys();
        const vi = this.values();
        const callback = thisArg === undefined ? callbackfn :
            (v, k, m) => callbackfn.call(thisArg, v, k, m);
        const ktoi = this[extension_kKeyToIdx] || (this[extension_kKeyToIdx] = new Map());
        const itov = this[extension_kIdxToVal] || (this[extension_kIdxToVal] = new Array(this.size));
        for (let k, v, i = 0, kr, vr; !((kr = ki.next()).done || (vr = vi.next()).done); ++i) {
            k = kr.value;
            v = vr.value;
            itov[i] = v;
            ktoi.has(k) || ktoi.set(k, i);
            callback(v, k, this);
        }
    }
    toArray() { return [...this.values()]; }
    toJSON() {
        const obj = {};
        this.forEach((val, key) => obj[key] = val);
        return obj;
    }
    inspect() { return this.toString(); }
    [extension_kCustomInspect]() { return this.toString(); }
    toString() {
        const str = [];
        this.forEach((val, key) => {
            key = extension_valueToString(key);
            val = extension_valueToString(val);
            str.push(`${key}: ${val}`);
        });
        return `{ ${str.join(', ')} }`;
    }
}
extension_Row[Symbol.toStringTag] = ((proto) => {
    Object.defineProperties(proto, {
        'size': { writable: true, enumerable: false, configurable: false, value: 0 },
        [extension_kParent]: { writable: true, enumerable: false, configurable: false, value: null },
        [extension_kRowIndex]: { writable: true, enumerable: false, configurable: false, value: -1 },
    });
    return proto[Symbol.toStringTag] = 'Row';
})(extension_Row.prototype);
class extension_MapRow extends extension_Row {
    constructor(slice) {
        super(slice, slice.length);
        return extension_createRowProxy(this);
    }
    keys() {
        return this[extension_kParent].getChildAt(0)[Symbol.iterator]();
    }
    values() {
        return this[extension_kParent].getChildAt(1)[Symbol.iterator]();
    }
    getKey(idx) {
        return this[extension_kParent].getChildAt(0).get(idx);
    }
    getIndex(key) {
        return this[extension_kParent].getChildAt(0).indexOf(key);
    }
    getValue(index) {
        return this[extension_kParent].getChildAt(1).get(index);
    }
    setValue(index, value) {
        this[extension_kParent].getChildAt(1).set(index, value);
    }
}
class extension_StructRow extends extension_Row {
    constructor(parent) {
        super(parent, parent.type.children.length);
        return extension_defineRowProxyProperties(this);
    }
    *keys() {
        for (const field of this[extension_kParent].type.children) {
            yield field.name;
        }
    }
    *values() {
        for (const field of this[extension_kParent].type.children) {
            yield this[field.name];
        }
    }
    getKey(idx) {
        return this[extension_kParent].type.children[idx].name;
    }
    getIndex(key) {
        return this[extension_kParent].type.children.findIndex((f) => f.name === key);
    }
    getValue(index) {
        return this[extension_kParent].getChildAt(index).get(this[extension_kRowIndex]);
    }
    setValue(index, value) {
        return this[extension_kParent].getChildAt(index).set(this[extension_kRowIndex], value);
    }
}
Object.setPrototypeOf(extension_Row.prototype, Map.prototype);
/** @ignore */
const extension_defineRowProxyProperties = (() => {
    const desc = { enumerable: true, configurable: false, get: null, set: null };
    return (row) => {
        let idx = -1, ktoi = row[extension_kKeyToIdx] || (row[extension_kKeyToIdx] = new Map());
        const getter = (key) => function () { return this.get(key); };
        const setter = (key) => function (val) { return this.set(key, val); };
        for (const key of row.keys()) {
            ktoi.set(key, ++idx);
            desc.get = getter(key);
            desc.set = setter(key);
            row.hasOwnProperty(key) || (desc.enumerable = true, Object.defineProperty(row, key, desc));
            row.hasOwnProperty(idx) || (desc.enumerable = false, Object.defineProperty(row, idx, desc));
        }
        desc.get = desc.set = null;
        return row;
    };
})();
/** @ignore */
const extension_createRowProxy = (() => {
    if (typeof Proxy === 'undefined') {
        return extension_defineRowProxyProperties;
    }
    const has = extension_Row.prototype.has;
    const get = extension_Row.prototype.get;
    const set = extension_Row.prototype.set;
    const getKey = extension_Row.prototype.getKey;
    const RowProxyHandler = {
        isExtensible() { return false; },
        deleteProperty() { return false; },
        preventExtensions() { return true; },
        ownKeys(row) { return [...row.keys()].map((x) => `${x}`); },
        has(row, key) {
            switch (key) {
                case 'getKey':
                case 'getIndex':
                case 'getValue':
                case 'setValue':
                case 'toArray':
                case 'toJSON':
                case 'inspect':
                case 'constructor':
                case 'isPrototypeOf':
                case 'propertyIsEnumerable':
                case 'toString':
                case 'toLocaleString':
                case 'valueOf':
                case 'size':
                case 'has':
                case 'get':
                case 'set':
                case 'clear':
                case 'delete':
                case 'keys':
                case 'values':
                case 'entries':
                case 'forEach':
                case '__proto__':
                case '__defineGetter__':
                case '__defineSetter__':
                case 'hasOwnProperty':
                case '__lookupGetter__':
                case '__lookupSetter__':
                case Symbol.iterator:
                case Symbol.toStringTag:
                case extension_kParent:
                case extension_kRowIndex:
                case extension_kIdxToVal:
                case extension_kKeyToIdx:
                case extension_kCustomInspect:
                    return true;
            }
            if (typeof key === 'number' && !row.has(key)) {
                key = row.getKey(key);
            }
            return row.has(key);
        },
        get(row, key, receiver) {
            switch (key) {
                case 'getKey':
                case 'getIndex':
                case 'getValue':
                case 'setValue':
                case 'toArray':
                case 'toJSON':
                case 'inspect':
                case 'constructor':
                case 'isPrototypeOf':
                case 'propertyIsEnumerable':
                case 'toString':
                case 'toLocaleString':
                case 'valueOf':
                case 'size':
                case 'has':
                case 'get':
                case 'set':
                case 'clear':
                case 'delete':
                case 'keys':
                case 'values':
                case 'entries':
                case 'forEach':
                case '__proto__':
                case '__defineGetter__':
                case '__defineSetter__':
                case 'hasOwnProperty':
                case '__lookupGetter__':
                case '__lookupSetter__':
                case Symbol.iterator:
                case Symbol.toStringTag:
                case extension_kParent:
                case extension_kRowIndex:
                case extension_kIdxToVal:
                case extension_kKeyToIdx:
                case extension_kCustomInspect:
                    return Reflect.get(row, key, receiver);
            }
            if (typeof key === 'number' && !has.call(receiver, key)) {
                key = getKey.call(receiver, key);
            }
            return get.call(receiver, key);
        },
        set(row, key, val, receiver) {
            switch (key) {
                case extension_kParent:
                case extension_kRowIndex:
                case extension_kIdxToVal:
                case extension_kKeyToIdx:
                    return Reflect.set(row, key, val, receiver);
                case 'getKey':
                case 'getIndex':
                case 'getValue':
                case 'setValue':
                case 'toArray':
                case 'toJSON':
                case 'inspect':
                case 'constructor':
                case 'isPrototypeOf':
                case 'propertyIsEnumerable':
                case 'toString':
                case 'toLocaleString':
                case 'valueOf':
                case 'size':
                case 'has':
                case 'get':
                case 'set':
                case 'clear':
                case 'delete':
                case 'keys':
                case 'values':
                case 'entries':
                case 'forEach':
                case '__proto__':
                case '__defineGetter__':
                case '__defineSetter__':
                case 'hasOwnProperty':
                case '__lookupGetter__':
                case '__lookupSetter__':
                case Symbol.iterator:
                case Symbol.toStringTag:
                    return false;
            }
            if (typeof key === 'number' && !has.call(receiver, key)) {
                key = getKey.call(receiver, key);
            }
            return has.call(receiver, key) ? !!set.call(receiver, key, val) : false;
        },
    };
    return (row) => new Proxy(row, RowProxyHandler);
})();

//# sourceMappingURL=row.mjs.map

;// ../../node_modules/apache-arrow/util/vector.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
function extension_clampIndex(source, index, then) {
    const length = source.length;
    const adjust = index > -1 ? index : (length + (index % length));
    return then ? then(source, adjust) : adjust;
}
/** @ignore */
let extension_tmp;
/** @ignore */
function extension_clampRange(source, begin, end, then) {
    // Adjust args similar to Array.prototype.slice. Normalize begin/end to
    // clamp between 0 and length, and wrap around on negative indices, e.g.
    // slice(-1, 5) or slice(5, -1)
    let { length: len = 0 } = source;
    let lhs = typeof begin !== 'number' ? 0 : begin;
    let rhs = typeof end !== 'number' ? len : end;
    // wrap around on negative start/end positions
    (lhs < 0) && (lhs = ((lhs % len) + len) % len);
    (rhs < 0) && (rhs = ((rhs % len) + len) % len);
    // ensure lhs <= rhs
    (rhs < lhs) && (extension_tmp = lhs, lhs = rhs, rhs = extension_tmp);
    // ensure rhs <= length
    (rhs > len) && (rhs = len);
    return then ? then(source, lhs, rhs) : [lhs, rhs];
}
const extension_big0 = extension_BigIntAvailable ? extension_BigIntCtor(0) : 0;
const extension_isNaNFast = (value) => value !== value;
/** @ignore */
function extension_createElementComparator(search) {
    let typeofSearch = typeof search;
    // Compare primitives
    if (typeofSearch !== 'object' || search === null) {
        // Compare NaN
        if (extension_isNaNFast(search)) {
            return extension_isNaNFast;
        }
        return typeofSearch !== 'bigint'
            ? (value) => value === search
            : (value) => (extension_big0 + value) === search;
    }
    // Compare Dates
    if (search instanceof Date) {
        const valueOfSearch = search.valueOf();
        return (value) => value instanceof Date ? (value.valueOf() === valueOfSearch) : false;
    }
    // Compare TypedArrays
    if (ArrayBuffer.isView(search)) {
        return (value) => value ? extension_compareArrayLike(search, value) : false;
    }
    // Compare Maps and Rows
    if (search instanceof Map) {
        return extension_creatMapComparator(search);
    }
    // Compare Array-likes
    if (Array.isArray(search)) {
        return extension_createArrayLikeComparator(search);
    }
    // Compare Vectors
    if (search instanceof extension_AbstractVector) {
        return extension_createVectorComparator(search);
    }
    // Compare non-empty Objects
    return extension_createObjectComparator(search);
}
/** @ignore */
function extension_createArrayLikeComparator(lhs) {
    const comparators = [];
    for (let i = -1, n = lhs.length; ++i < n;) {
        comparators[i] = extension_createElementComparator(lhs[i]);
    }
    return extension_createSubElementsComparator(comparators);
}
/** @ignore */
function extension_creatMapComparator(lhs) {
    let i = -1;
    const comparators = [];
    lhs.forEach((v) => comparators[++i] = extension_createElementComparator(v));
    return extension_createSubElementsComparator(comparators);
}
/** @ignore */
function extension_createVectorComparator(lhs) {
    const comparators = [];
    for (let i = -1, n = lhs.length; ++i < n;) {
        comparators[i] = extension_createElementComparator(lhs.get(i));
    }
    return extension_createSubElementsComparator(comparators);
}
/** @ignore */
function extension_createObjectComparator(lhs) {
    const keys = Object.keys(lhs);
    // Only compare non-empty Objects
    if (keys.length === 0) {
        return () => false;
    }
    const comparators = [];
    for (let i = -1, n = keys.length; ++i < n;) {
        comparators[i] = extension_createElementComparator(lhs[keys[i]]);
    }
    return extension_createSubElementsComparator(comparators, keys);
}
function extension_createSubElementsComparator(comparators, keys) {
    return (rhs) => {
        if (!rhs || typeof rhs !== 'object') {
            return false;
        }
        switch (rhs.constructor) {
            case Array: return extension_compareArray(comparators, rhs);
            case Map:
            case extension_MapRow:
            case extension_StructRow:
                return extension_compareObject(comparators, rhs, rhs.keys());
            case Object:
            case undefined: // support `Object.create(null)` objects
                return extension_compareObject(comparators, rhs, keys || Object.keys(rhs));
        }
        return rhs instanceof extension_AbstractVector ? extension_compareVector(comparators, rhs) : false;
    };
}
function extension_compareArray(comparators, arr) {
    const n = comparators.length;
    if (arr.length !== n) {
        return false;
    }
    for (let i = -1; ++i < n;) {
        if (!(comparators[i](arr[i]))) {
            return false;
        }
    }
    return true;
}
function extension_compareVector(comparators, vec) {
    const n = comparators.length;
    if (vec.length !== n) {
        return false;
    }
    for (let i = -1; ++i < n;) {
        if (!(comparators[i](vec.get(i)))) {
            return false;
        }
    }
    return true;
}
function extension_compareObject(comparators, obj, keys) {
    const lKeyItr = keys[Symbol.iterator]();
    const rKeyItr = obj instanceof Map ? obj.keys() : Object.keys(obj)[Symbol.iterator]();
    const rValItr = obj instanceof Map ? obj.values() : Object.values(obj)[Symbol.iterator]();
    let i = 0;
    let n = comparators.length;
    let rVal = rValItr.next();
    let lKey = lKeyItr.next();
    let rKey = rKeyItr.next();
    for (; i < n && !lKey.done && !rKey.done && !rVal.done; ++i, lKey = lKeyItr.next(), rKey = rKeyItr.next(), rVal = rValItr.next()) {
        if (lKey.value !== rKey.value || !comparators[i](rVal.value)) {
            break;
        }
    }
    if (i === n && lKey.done && rKey.done && rVal.done) {
        return true;
    }
    lKeyItr.return && lKeyItr.return();
    rKeyItr.return && rKeyItr.return();
    rValItr.return && rValItr.return();
    return false;
}

//# sourceMappingURL=vector.mjs.map

;// ../../node_modules/apache-arrow/vector/chunked.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
class extension_Chunked extends extension_AbstractVector {
    constructor(type, chunks = [], offsets = extension_calculateOffsets(chunks)) {
        super();
        this._nullCount = -1;
        this._type = type;
        this._chunks = chunks;
        this._chunkOffsets = offsets;
        this._length = offsets[offsets.length - 1];
        this._numChildren = (this._type.children || []).length;
    }
    /** @nocollapse */
    static flatten(...vectors) {
        return extension_selectChunkArgs(extension_AbstractVector, vectors);
    }
    /** @nocollapse */
    static concat(...vectors) {
        const chunks = extension_Chunked.flatten(...vectors);
        return new extension_Chunked(chunks[0].type, chunks);
    }
    get type() { return this._type; }
    get length() { return this._length; }
    get chunks() { return this._chunks; }
    get typeId() { return this._type.typeId; }
    get VectorName() { return `Chunked<${this._type}>`; }
    get data() {
        return this._chunks[0] ? this._chunks[0].data : null;
    }
    get ArrayType() { return this._type.ArrayType; }
    get numChildren() { return this._numChildren; }
    get stride() { return this._chunks[0] ? this._chunks[0].stride : 1; }
    get byteLength() {
        return this._chunks.reduce((byteLength, chunk) => byteLength + chunk.byteLength, 0);
    }
    get nullCount() {
        let nullCount = this._nullCount;
        if (nullCount < 0) {
            this._nullCount = nullCount = this._chunks.reduce((x, { nullCount }) => x + nullCount, 0);
        }
        return nullCount;
    }
    get indices() {
        if (extension_DataType.isDictionary(this._type)) {
            if (!this._indices) {
                const chunks = this._chunks;
                this._indices = (chunks.length === 1
                    ? chunks[0].indices
                    : extension_Chunked.concat(...chunks.map((x) => x.indices)));
            }
            return this._indices;
        }
        return null;
    }
    get dictionary() {
        if (extension_DataType.isDictionary(this._type)) {
            return this._chunks[this._chunks.length - 1].data.dictionary;
        }
        return null;
    }
    *[Symbol.iterator]() {
        for (const chunk of this._chunks) {
            yield* chunk;
        }
    }
    clone(chunks = this._chunks) {
        return new extension_Chunked(this._type, chunks);
    }
    concat(...others) {
        return this.clone(extension_Chunked.flatten(this, ...others));
    }
    slice(begin, end) {
        return extension_clampRange(this, begin, end, this._sliceInternal);
    }
    getChildAt(index) {
        if (index < 0 || index >= this._numChildren) {
            return null;
        }
        let columns = this._children || (this._children = []);
        let child, field, chunks;
        if (child = columns[index]) {
            return child;
        }
        if (field = (this._type.children || [])[index]) {
            chunks = this._chunks
                .map((vector) => vector.getChildAt(index))
                .filter((vec) => vec != null);
            if (chunks.length > 0) {
                return (columns[index] = new extension_Chunked(field.type, chunks));
            }
        }
        return null;
    }
    search(index, then) {
        let idx = index;
        // binary search to find the child vector and value indices
        let offsets = this._chunkOffsets, rhs = offsets.length - 1;
        // return early if out of bounds, or if there's just one child
        if (idx < 0) {
            return null;
        }
        if (idx >= offsets[rhs]) {
            return null;
        }
        if (rhs <= 1) {
            return then ? then(this, 0, idx) : [0, idx];
        }
        let lhs = 0, pos = 0, mid = 0;
        do {
            if (lhs + 1 === rhs) {
                return then ? then(this, lhs, idx - pos) : [lhs, idx - pos];
            }
            mid = lhs + ((rhs - lhs) / 2) | 0;
            idx >= offsets[mid] ? (lhs = mid) : (rhs = mid);
        } while (idx < offsets[rhs] && idx >= (pos = offsets[lhs]));
        return null;
    }
    isValid(index) {
        return !!this.search(index, this.isValidInternal);
    }
    get(index) {
        return this.search(index, this.getInternal);
    }
    set(index, value) {
        this.search(index, ({ chunks }, i, j) => chunks[i].set(j, value));
    }
    indexOf(element, offset) {
        if (offset && typeof offset === 'number') {
            return this.search(offset, (self, i, j) => this.indexOfInternal(self, i, j, element));
        }
        return this.indexOfInternal(this, 0, Math.max(0, offset || 0), element);
    }
    toArray() {
        const { chunks } = this;
        const n = chunks.length;
        let ArrayType = this._type.ArrayType;
        if (n <= 0) {
            return new ArrayType(0);
        }
        if (n <= 1) {
            return chunks[0].toArray();
        }
        let len = 0, src = new Array(n);
        for (let i = -1; ++i < n;) {
            len += (src[i] = chunks[i].toArray()).length;
        }
        if (ArrayType !== src[0].constructor) {
            ArrayType = src[0].constructor;
        }
        let dst = new ArrayType(len);
        let set = ArrayType === Array ? extension_arraySet : extension_typedSet;
        for (let i = -1, idx = 0; ++i < n;) {
            idx = set(src[i], dst, idx);
        }
        return dst;
    }
    getInternal({ _chunks }, i, j) { return _chunks[i].get(j); }
    isValidInternal({ _chunks }, i, j) { return _chunks[i].isValid(j); }
    indexOfInternal({ _chunks }, chunkIndex, fromIndex, element) {
        let i = chunkIndex - 1, n = _chunks.length;
        let start = fromIndex, offset = 0, found = -1;
        while (++i < n) {
            if (~(found = _chunks[i].indexOf(element, start))) {
                return offset + found;
            }
            start = 0;
            offset += _chunks[i].length;
        }
        return -1;
    }
    _sliceInternal(self, begin, end) {
        const slices = [];
        const { chunks, _chunkOffsets: chunkOffsets } = self;
        for (let i = -1, n = chunks.length; ++i < n;) {
            const chunk = chunks[i];
            const chunkLength = chunk.length;
            const chunkOffset = chunkOffsets[i];
            // If the child is to the right of the slice boundary, we can stop
            if (chunkOffset >= end) {
                break;
            }
            // If the child is to the left of of the slice boundary, exclude
            if (begin >= chunkOffset + chunkLength) {
                continue;
            }
            // If the child is between both left and right boundaries, include w/o slicing
            if (chunkOffset >= begin && (chunkOffset + chunkLength) <= end) {
                slices.push(chunk);
                continue;
            }
            // If the child overlaps one of the slice boundaries, include that slice
            const from = Math.max(0, begin - chunkOffset);
            const to = Math.min(end - chunkOffset, chunkLength);
            slices.push(chunk.slice(from, to));
        }
        return self.clone(slices);
    }
}
/** @ignore */
function extension_calculateOffsets(vectors) {
    let offsets = new Uint32Array((vectors || []).length + 1);
    let offset = offsets[0] = 0, length = offsets.length;
    for (let index = 0; ++index < length;) {
        offsets[index] = (offset += vectors[index - 1].length);
    }
    return offsets;
}
/** @ignore */
const extension_typedSet = (src, dst, offset) => {
    dst.set(src, offset);
    return (offset + src.length);
};
/** @ignore */
const extension_arraySet = (src, dst, offset) => {
    let idx = offset;
    for (let i = -1, n = src.length; ++i < n;) {
        dst[idx++] = src[i];
    }
    return idx;
};

//# sourceMappingURL=chunked.mjs.map

;// ../../node_modules/apache-arrow/column.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.



class extension_column_Column extends extension_Chunked {
    constructor(field, vectors = [], offsets) {
        vectors = extension_Chunked.flatten(...vectors);
        super(field.type, vectors, offsets);
        this._field = field;
        if (vectors.length === 1 && !(this instanceof extension_SingleChunkColumn)) {
            return new extension_SingleChunkColumn(field, vectors[0], this._chunkOffsets);
        }
    }
    /** @nocollapse */
    static new(...args) {
        let [field, data, ...rest] = args;
        if (typeof field !== 'string' && !(field instanceof extension_Field)) {
            data = field;
            field = '';
        }
        const chunks = extension_Chunked.flatten(Array.isArray(data) ? [...data, ...rest] :
            data instanceof extension_AbstractVector ? [data, ...rest] :
                [extension_AbstractVector.new(data, ...rest)]);
        if (typeof field === 'string') {
            const type = chunks[0].data.type;
            field = new extension_Field(field, type, true);
        }
        else if (!field.nullable && chunks.some(({ nullCount }) => nullCount > 0)) {
            field = field.clone({ nullable: true });
        }
        return new extension_column_Column(field, chunks);
    }
    get field() { return this._field; }
    get name() { return this._field.name; }
    get nullable() { return this._field.nullable; }
    get metadata() { return this._field.metadata; }
    clone(chunks = this._chunks) {
        return new extension_column_Column(this._field, chunks);
    }
    getChildAt(index) {
        if (index < 0 || index >= this.numChildren) {
            return null;
        }
        let columns = this._children || (this._children = []);
        let column, field, chunks;
        if (column = columns[index]) {
            return column;
        }
        if (field = (this.type.children || [])[index]) {
            chunks = this._chunks
                .map((vector) => vector.getChildAt(index))
                .filter((vec) => vec != null);
            if (chunks.length > 0) {
                return (columns[index] = new extension_column_Column(field, chunks));
            }
        }
        return null;
    }
}
/** @ignore */
class extension_SingleChunkColumn extends extension_column_Column {
    constructor(field, vector, offsets) {
        super(field, [vector], offsets);
        this._chunk = vector;
    }
    search(index, then) {
        return then ? then(this, 0, index) : [0, index];
    }
    isValid(index) {
        return this._chunk.isValid(index);
    }
    get(index) {
        return this._chunk.get(index);
    }
    set(index, value) {
        this._chunk.set(index, value);
    }
    indexOf(element, offset) {
        return this._chunk.indexOf(element, offset);
    }
}

//# sourceMappingURL=column.mjs.map

;// ../../node_modules/apache-arrow/util/args.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.






const extension_args_isArray = Array.isArray;
/** @ignore */
const extension_selectArgs = (Ctor, vals) => src_extension_selectArgs(Ctor, vals, [], 0);
/** @ignore */
const extension_selectColumnArgs = (args) => {
    const [fields, values] = src_extension_selectFieldArgs(args, [[], []]);
    return values.map((x, i) => x instanceof extension_column_Column ? extension_column_Column.new(x.field.clone(fields[i]), x) :
        x instanceof extension_AbstractVector ? extension_column_Column.new(fields[i], x) :
            extension_column_Column.new(fields[i], []));
};
/** @ignore */
const extension_selectFieldArgs = (args) => src_extension_selectFieldArgs(args, [[], []]);
/** @ignore */
const extension_selectChunkArgs = (Ctor, vals) => src_extension_selectChunkArgs(Ctor, vals, [], 0);
/** @ignore */
const extension_selectVectorChildrenArgs = (Ctor, vals) => src_extension_selectVectorChildrenArgs(Ctor, vals, [], 0);
/** @ignore */
const extension_selectColumnChildrenArgs = (Ctor, vals) => src_extension_selectColumnChildrenArgs(Ctor, vals, [], 0);
/** @ignore */
function src_extension_selectArgs(Ctor, vals, res, idx) {
    let value, j = idx;
    let i = -1, n = vals.length;
    while (++i < n) {
        if (extension_args_isArray(value = vals[i])) {
            j = src_extension_selectArgs(Ctor, value, res, j).length;
        }
        else if (value instanceof Ctor) {
            res[j++] = value;
        }
    }
    return res;
}
/** @ignore */
function src_extension_selectChunkArgs(Ctor, vals, res, idx) {
    let value, j = idx;
    let i = -1, n = vals.length;
    while (++i < n) {
        if (extension_args_isArray(value = vals[i])) {
            j = src_extension_selectChunkArgs(Ctor, value, res, j).length;
        }
        else if (value instanceof extension_Chunked) {
            j = src_extension_selectChunkArgs(Ctor, value.chunks, res, j).length;
        }
        else if (value instanceof Ctor) {
            res[j++] = value;
        }
    }
    return res;
}
/** @ignore */
function src_extension_selectVectorChildrenArgs(Ctor, vals, res, idx) {
    let value, j = idx;
    let i = -1, n = vals.length;
    while (++i < n) {
        if (extension_args_isArray(value = vals[i])) {
            j = src_extension_selectVectorChildrenArgs(Ctor, value, res, j).length;
        }
        else if (value instanceof Ctor) {
            j = src_extension_selectArgs(extension_AbstractVector, value.schema.fields.map((_, i) => value.getChildAt(i)), res, j).length;
        }
        else if (value instanceof extension_AbstractVector) {
            res[j++] = value;
        }
    }
    return res;
}
/** @ignore */
function src_extension_selectColumnChildrenArgs(Ctor, vals, res, idx) {
    let value, j = idx;
    let i = -1, n = vals.length;
    while (++i < n) {
        if (extension_args_isArray(value = vals[i])) {
            j = src_extension_selectColumnChildrenArgs(Ctor, value, res, j).length;
        }
        else if (value instanceof Ctor) {
            j = src_extension_selectArgs(extension_column_Column, value.schema.fields.map((f, i) => extension_column_Column.new(f, value.getChildAt(i))), res, j).length;
        }
        else if (value instanceof extension_column_Column) {
            res[j++] = value;
        }
    }
    return res;
}
/** @ignore */
const extension_toKeysAndValues = (xs, [k, v], i) => (xs[0][i] = k, xs[1][i] = v, xs);
/** @ignore */
function src_extension_selectFieldArgs(vals, ret) {
    let keys, n;
    switch (n = vals.length) {
        case 0: return ret;
        case 1:
            keys = ret[0];
            if (!(vals[0])) {
                return ret;
            }
            if (extension_args_isArray(vals[0])) {
                return src_extension_selectFieldArgs(vals[0], ret);
            }
            if (!(vals[0] instanceof extension_Data || vals[0] instanceof extension_AbstractVector || vals[0] instanceof extension_DataType)) {
                [keys, vals] = Object.entries(vals[0]).reduce(extension_toKeysAndValues, ret);
            }
            break;
        default:
            !extension_args_isArray(keys = vals[n - 1])
                ? (vals = extension_args_isArray(vals[0]) ? vals[0] : vals, keys = [])
                : (vals = extension_args_isArray(vals[0]) ? vals[0] : vals.slice(0, n - 1));
    }
    let fieldIndex = -1;
    let valueIndex = -1;
    let idx = -1, len = vals.length;
    let field;
    let val;
    let [fields, values] = ret;
    while (++idx < len) {
        val = vals[idx];
        if (val instanceof extension_column_Column && (values[++valueIndex] = val)) {
            fields[++fieldIndex] = val.field.clone(keys[idx], val.type, true);
        }
        else {
            ({ [idx]: field = idx } = keys);
            if (val instanceof extension_DataType && (values[++valueIndex] = val)) {
                fields[++fieldIndex] = extension_Field.new(field, val, true);
            }
            else if (val && val.type && (values[++valueIndex] = val)) {
                val instanceof extension_Data && (values[valueIndex] = val = extension_AbstractVector.new(val));
                fields[++fieldIndex] = extension_Field.new(field, val.type, true);
            }
        }
    }
    return ret;
}

//# sourceMappingURL=args.mjs.map

;// ../../node_modules/apache-arrow/schema.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




class extension_Schema {
    constructor(fields = [], metadata, dictionaries) {
        this.fields = (fields || []);
        this.metadata = metadata || new Map();
        if (!dictionaries) {
            dictionaries = extension_generateDictionaryMap(fields);
        }
        this.dictionaries = dictionaries;
    }
    /** @nocollapse */
    static from(...args) {
        return extension_Schema.new(args[0], args[1]);
    }
    /** @nocollapse */
    static new(...args) {
        return new extension_Schema(extension_selectFieldArgs(args)[0]);
    }
    get [Symbol.toStringTag]() { return 'Schema'; }
    toString() {
        return `Schema<{ ${this.fields.map((f, i) => `${i}: ${f}`).join(', ')} }>`;
    }
    compareTo(other) {
        return extension_instance.compareSchemas(this, other);
    }
    select(...columnNames) {
        const names = columnNames.reduce((xs, x) => (xs[x] = true) && xs, Object.create(null));
        return new extension_Schema(this.fields.filter((f) => names[f.name]), this.metadata);
    }
    selectAt(...columnIndices) {
        return new extension_Schema(columnIndices.map((i) => this.fields[i]).filter(Boolean), this.metadata);
    }
    assign(...args) {
        const other = args[0] instanceof extension_Schema ? args[0]
            : new extension_Schema(extension_selectArgs(extension_Field, args));
        const curFields = [...this.fields];
        const metadata = extension_mergeMaps(extension_mergeMaps(new Map(), this.metadata), other.metadata);
        const newFields = other.fields.filter((f2) => {
            const i = curFields.findIndex((f) => f.name === f2.name);
            return ~i ? (curFields[i] = f2.clone({
                metadata: extension_mergeMaps(extension_mergeMaps(new Map(), curFields[i].metadata), f2.metadata)
            })) && false : true;
        });
        const newDictionaries = extension_generateDictionaryMap(newFields, new Map());
        return new extension_Schema([...curFields, ...newFields], metadata, new Map([...this.dictionaries, ...newDictionaries]));
    }
}
class extension_Field {
    constructor(name, type, nullable = false, metadata) {
        this.name = name;
        this.type = type;
        this.nullable = nullable;
        this.metadata = metadata || new Map();
    }
    /** @nocollapse */
    static new(...args) {
        let [name, type, nullable, metadata] = args;
        if (args[0] && typeof args[0] === 'object') {
            ({ name } = args[0]);
            (type === undefined) && (type = args[0].type);
            (nullable === undefined) && (nullable = args[0].nullable);
            (metadata === undefined) && (metadata = args[0].metadata);
        }
        return new extension_Field(`${name}`, type, nullable, metadata);
    }
    get typeId() { return this.type.typeId; }
    get [Symbol.toStringTag]() { return 'Field'; }
    toString() { return `${this.name}: ${this.type}`; }
    compareTo(other) {
        return extension_instance.compareField(this, other);
    }
    clone(...args) {
        let [name, type, nullable, metadata] = args;
        (!args[0] || typeof args[0] !== 'object')
            ? ([name = this.name, type = this.type, nullable = this.nullable, metadata = this.metadata] = args)
            : ({ name = this.name, type = this.type, nullable = this.nullable, metadata = this.metadata } = args[0]);
        return extension_Field.new(name, type, nullable, metadata);
    }
}
/** @ignore */
function extension_mergeMaps(m1, m2) {
    return new Map([...(m1 || new Map()), ...(m2 || new Map())]);
}
/** @ignore */
function extension_generateDictionaryMap(fields, dictionaries = new Map()) {
    for (let i = -1, n = fields.length; ++i < n;) {
        const field = fields[i];
        const type = field.type;
        if (extension_DataType.isDictionary(type)) {
            if (!dictionaries.has(type.id)) {
                dictionaries.set(type.id, type.dictionary);
            }
            else if (dictionaries.get(type.id) !== type.dictionary) {
                throw new Error(`Cannot create Schema containing two different dictionaries with the same Id`);
            }
        }
        if (type.children && type.children.length > 0) {
            extension_generateDictionaryMap(type.children, dictionaries);
        }
    }
    return dictionaries;
}
// Add these here so they're picked up by the externs creator
// in the build, and closure-compiler doesn't minify them away
extension_Schema.prototype.fields = null;
extension_Schema.prototype.metadata = null;
extension_Schema.prototype.dictionaries = null;
extension_Field.prototype.type = null;
extension_Field.prototype.name = null;
extension_Field.prototype.nullable = null;
extension_Field.prototype.metadata = null;

//# sourceMappingURL=schema.mjs.map

;// ../../node_modules/apache-arrow/builder/list.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.





/** @ignore */
class extension_ListBuilder extends extension_VariableWidthBuilder {
    constructor(opts) {
        super(opts);
        this._run = new extension_Run();
        this._offsets = new extension_OffsetsBufferBuilder();
    }
    addChild(child, name = '0') {
        if (this.numChildren > 0) {
            throw new Error('ListBuilder can only have one child.');
        }
        this.children[this.numChildren] = child;
        this.type = new extension_List(new extension_Field(name, child.type, true));
        return this.numChildren - 1;
    }
    clear() {
        this._run.clear();
        return super.clear();
    }
    _flushPending(pending) {
        const run = this._run;
        const offsets = this._offsets;
        const setValue = this._setValue;
        let index = 0, value;
        for ([index, value] of pending) {
            if (value === undefined) {
                offsets.set(index, 0);
            }
            else {
                offsets.set(index, value.length);
                setValue(this, index, run.bind(value));
            }
        }
    }
}

//# sourceMappingURL=list.mjs.map

;// ../../node_modules/apache-arrow/builder/fixedsizelist.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
class extension_FixedSizeListBuilder extends extension_Builder {
    constructor() {
        super(...arguments);
        this._run = new extension_Run();
    }
    setValue(index, value) {
        super.setValue(index, this._run.bind(value));
    }
    addChild(child, name = '0') {
        if (this.numChildren > 0) {
            throw new Error('FixedSizeListBuilder can only have one child.');
        }
        const childIndex = this.children.push(child);
        this.type = new extension_FixedSizeList(this.type.listSize, new extension_Field(name, child.type, true));
        return childIndex;
    }
    clear() {
        this._run.clear();
        return super.clear();
    }
}

//# sourceMappingURL=fixedsizelist.mjs.map

;// ../../node_modules/apache-arrow/builder/map.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.



/** @ignore */
class extension_MapBuilder extends extension_VariableWidthBuilder {
    set(index, value) {
        return super.set(index, value);
    }
    setValue(index, value) {
        value = value instanceof Map ? value : new Map(Object.entries(value));
        const pending = this._pending || (this._pending = new Map());
        const current = pending.get(index);
        current && (this._pendingLength -= current.size);
        this._pendingLength += value.size;
        pending.set(index, value);
    }
    addChild(child, name = `${this.numChildren}`) {
        if (this.numChildren > 0) {
            throw new Error('ListBuilder can only have one child.');
        }
        this.children[this.numChildren] = child;
        this.type = new extension_Map_(new extension_Field(name, child.type, true), this.type.keysSorted);
        return this.numChildren - 1;
    }
    _flushPending(pending) {
        const offsets = this._offsets;
        const setValue = this._setValue;
        pending.forEach((value, index) => {
            if (value === undefined) {
                offsets.set(index, 0);
            }
            else {
                offsets.set(index, value.size);
                setValue(this, index, value);
            }
        });
    }
}

//# sourceMappingURL=map.mjs.map

;// ../../node_modules/apache-arrow/builder/struct.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.



/** @ignore */
class extension_StructBuilder extends extension_Builder {
    addChild(child, name = `${this.numChildren}`) {
        const childIndex = this.children.push(child);
        this.type = new extension_Struct([...this.type.children, new extension_Field(name, child.type, true)]);
        return childIndex;
    }
}

//# sourceMappingURL=struct.mjs.map

;// ../../node_modules/apache-arrow/builder/union.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
class extension_UnionBuilder extends extension_Builder {
    constructor(options) {
        super(options);
        this._typeIds = new extension_DataBufferBuilder(new Int8Array(0), 1);
        if (typeof options['valueToChildTypeId'] === 'function') {
            this._valueToChildTypeId = options['valueToChildTypeId'];
        }
    }
    get typeIdToChildIndex() { return this.type.typeIdToChildIndex; }
    append(value, childTypeId) {
        return this.set(this.length, value, childTypeId);
    }
    set(index, value, childTypeId) {
        if (childTypeId === undefined) {
            childTypeId = this._valueToChildTypeId(this, value, index);
        }
        if (this.setValid(index, this.isValid(value))) {
            this.setValue(index, value, childTypeId);
        }
        return this;
    }
    // @ts-ignore
    setValue(index, value, childTypeId) {
        this._typeIds.set(index, childTypeId);
        super.setValue(index, value);
    }
    // @ts-ignore
    addChild(child, name = `${this.children.length}`) {
        const childTypeId = this.children.push(child);
        const { type: { children, mode, typeIds } } = this;
        const fields = [...children, new extension_Field(name, child.type)];
        this.type = new extension_Union_(mode, [...typeIds, childTypeId], fields);
        return childTypeId;
    }
    /** @ignore */
    // @ts-ignore
    _valueToChildTypeId(builder, value, offset) {
        throw new Error(`Cannot map UnionBuilder value to child typeId. \
Pass the \`childTypeId\` as the second argument to unionBuilder.append(), \
or supply a \`valueToChildTypeId\` function as part of the UnionBuilder constructor options.`);
    }
}
/** @ignore */
class extension_SparseUnionBuilder extends extension_UnionBuilder {
}
/** @ignore */
class extension_DenseUnionBuilder extends extension_UnionBuilder {
    constructor(options) {
        super(options);
        this._offsets = new extension_DataBufferBuilder(new Int32Array(0));
    }
    /** @ignore */
    setValue(index, value, childTypeId) {
        const childIndex = this.type.typeIdToChildIndex[childTypeId];
        this._offsets.set(index, this.getChildAt(childIndex).length);
        return super.setValue(index, value, childTypeId);
    }
}

//# sourceMappingURL=union.mjs.map

;// ../../node_modules/apache-arrow/visitor/set.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.






/** @ignore */
class extension_SetVisitor extends extension_Visitor {
}
/** @ignore */
const extension_setEpochMsToDays = (data, index, epochMs) => { data[index] = (epochMs / 86400000) | 0; };
/** @ignore */
const extension_setEpochMsToMillisecondsLong = (data, index, epochMs) => {
    data[index] = (epochMs % 4294967296) | 0;
    data[index + 1] = (epochMs / 4294967296) | 0;
};
/** @ignore */
const extension_setEpochMsToMicrosecondsLong = (data, index, epochMs) => {
    data[index] = ((epochMs * 1000) % 4294967296) | 0;
    data[index + 1] = ((epochMs * 1000) / 4294967296) | 0;
};
/** @ignore */
const extension_setEpochMsToNanosecondsLong = (data, index, epochMs) => {
    data[index] = ((epochMs * 1000000) % 4294967296) | 0;
    data[index + 1] = ((epochMs * 1000000) / 4294967296) | 0;
};
/** @ignore */
const extension_setVariableWidthBytes = (values, valueOffsets, index, value) => {
    const { [index]: x, [index + 1]: y } = valueOffsets;
    if (x != null && y != null) {
        values.set(value.subarray(0, y - x), x);
    }
};
/** @ignore */
const extension_set_setBool = ({ offset, values }, index, val) => {
    const idx = offset + index;
    val ? (values[idx >> 3] |= (1 << (idx % 8))) // true
        : (values[idx >> 3] &= ~(1 << (idx % 8))); // false
};
/** @ignore */
const extension_setDateDay = ({ values }, index, value) => { extension_setEpochMsToDays(values, index, value.valueOf()); };
/** @ignore */
const extension_setDateMillisecond = ({ values }, index, value) => { extension_setEpochMsToMillisecondsLong(values, index * 2, value.valueOf()); };
/** @ignore */
const extension_setNumeric = ({ stride, values }, index, value) => { values[stride * index] = value; };
/** @ignore */
const extension_setFloat16 = ({ stride, values }, index, value) => { values[stride * index] = extension_float64ToUint16(value); };
/** @ignore */
const extension_setNumericX2 = (vector, index, value) => {
    switch (typeof value) {
        case 'bigint':
            vector.values64[index] = value;
            break;
        case 'number':
            vector.values[index * vector.stride] = value;
            break;
        default:
            const val = value;
            const { stride, ArrayType } = vector;
            const long = extension_toArrayBufferView(ArrayType, val);
            vector.values.set(long.subarray(0, stride), stride * index);
    }
};
/** @ignore */
const extension_setFixedSizeBinary = ({ stride, values }, index, value) => { values.set(value.subarray(0, stride), stride * index); };
/** @ignore */
const extension_setBinary = ({ values, valueOffsets }, index, value) => extension_setVariableWidthBytes(values, valueOffsets, index, value);
/** @ignore */
const extension_setUtf8 = ({ values, valueOffsets }, index, value) => {
    extension_setVariableWidthBytes(values, valueOffsets, index, extension_encodeUtf8(value));
};
/* istanbul ignore next */
/** @ignore */
const extension_setInt = (vector, index, value) => {
    vector.type.bitWidth < 64
        ? extension_setNumeric(vector, index, value)
        : extension_setNumericX2(vector, index, value);
};
/* istanbul ignore next */
/** @ignore */
const extension_setFloat = (vector, index, value) => {
    vector.type.precision !== extension_Precision.HALF
        ? extension_setNumeric(vector, index, value)
        : extension_setFloat16(vector, index, value);
};
/* istanbul ignore next */
const extension_setDate = (vector, index, value) => {
    vector.type.unit === extension_DateUnit.DAY
        ? extension_setDateDay(vector, index, value)
        : extension_setDateMillisecond(vector, index, value);
};
/** @ignore */
const extension_setTimestampSecond = ({ values }, index, value) => extension_setEpochMsToMillisecondsLong(values, index * 2, value / 1000);
/** @ignore */
const extension_setTimestampMillisecond = ({ values }, index, value) => extension_setEpochMsToMillisecondsLong(values, index * 2, value);
/** @ignore */
const extension_setTimestampMicrosecond = ({ values }, index, value) => extension_setEpochMsToMicrosecondsLong(values, index * 2, value);
/** @ignore */
const extension_setTimestampNanosecond = ({ values }, index, value) => extension_setEpochMsToNanosecondsLong(values, index * 2, value);
/* istanbul ignore next */
/** @ignore */
const extension_setTimestamp = (vector, index, value) => {
    switch (vector.type.unit) {
        case extension_TimeUnit.SECOND: return extension_setTimestampSecond(vector, index, value);
        case extension_TimeUnit.MILLISECOND: return extension_setTimestampMillisecond(vector, index, value);
        case extension_TimeUnit.MICROSECOND: return extension_setTimestampMicrosecond(vector, index, value);
        case extension_TimeUnit.NANOSECOND: return extension_setTimestampNanosecond(vector, index, value);
    }
};
/** @ignore */
const extension_setTimeSecond = ({ values, stride }, index, value) => { values[stride * index] = value; };
/** @ignore */
const extension_setTimeMillisecond = ({ values, stride }, index, value) => { values[stride * index] = value; };
/** @ignore */
const extension_setTimeMicrosecond = ({ values }, index, value) => { values.set(value.subarray(0, 2), 2 * index); };
/** @ignore */
const extension_setTimeNanosecond = ({ values }, index, value) => { values.set(value.subarray(0, 2), 2 * index); };
/* istanbul ignore next */
/** @ignore */
const extension_setTime = (vector, index, value) => {
    switch (vector.type.unit) {
        case extension_TimeUnit.SECOND: return extension_setTimeSecond(vector, index, value);
        case extension_TimeUnit.MILLISECOND: return extension_setTimeMillisecond(vector, index, value);
        case extension_TimeUnit.MICROSECOND: return extension_setTimeMicrosecond(vector, index, value);
        case extension_TimeUnit.NANOSECOND: return extension_setTimeNanosecond(vector, index, value);
    }
};
/** @ignore */
const extension_setDecimal = ({ values }, index, value) => { values.set(value.subarray(0, 4), 4 * index); };
/** @ignore */
const extension_setList = (vector, index, value) => {
    const values = vector.getChildAt(0), valueOffsets = vector.valueOffsets;
    for (let idx = -1, itr = valueOffsets[index], end = valueOffsets[index + 1]; itr < end;) {
        values.set(itr++, value.get(++idx));
    }
};
/** @ignore */
const extension_setMap = (vector, index, value) => {
    const values = vector.getChildAt(0), valueOffsets = vector.valueOffsets;
    const entries = value instanceof Map ? [...value] : Object.entries(value);
    for (let idx = -1, itr = valueOffsets[index], end = valueOffsets[index + 1]; itr < end;) {
        values.set(itr++, entries[++idx]);
    }
};
/** @ignore */ const extension_setStructArrayValue = (o, v) => (c, _, i) => c && c.set(o, v[i]);
/** @ignore */ const extension_setStructVectorValue = (o, v) => (c, _, i) => c && c.set(o, v.get(i));
/** @ignore */ const extension_setStructMapValue = (o, v) => (c, f, _) => c && c.set(o, v.get(f.name));
/** @ignore */ const extension_setStructObjectValue = (o, v) => (c, f, _) => c && c.set(o, v[f.name]);
/** @ignore */
const extension_setStruct = (vector, index, value) => {
    const setValue = value instanceof Map ? extension_setStructMapValue(index, value) :
        value instanceof extension_AbstractVector ? extension_setStructVectorValue(index, value) :
            Array.isArray(value) ? extension_setStructArrayValue(index, value) :
                extension_setStructObjectValue(index, value);
    vector.type.children.forEach((f, i) => setValue(vector.getChildAt(i), f, i));
};
/* istanbul ignore next */
/** @ignore */
const extension_setUnion = (vector, index, value) => {
    vector.type.mode === extension_UnionMode.Dense ?
        extension_setDenseUnion(vector, index, value) :
        extension_setSparseUnion(vector, index, value);
};
/** @ignore */
const extension_setDenseUnion = (vector, index, value) => {
    const childIndex = vector.typeIdToChildIndex[vector.typeIds[index]];
    const child = vector.getChildAt(childIndex);
    child && child.set(vector.valueOffsets[index], value);
};
/** @ignore */
const extension_setSparseUnion = (vector, index, value) => {
    const childIndex = vector.typeIdToChildIndex[vector.typeIds[index]];
    const child = vector.getChildAt(childIndex);
    child && child.set(index, value);
};
/** @ignore */
const extension_setDictionary = (vector, index, value) => {
    const key = vector.getKey(index);
    if (key !== null) {
        vector.setValue(key, value);
    }
};
/* istanbul ignore next */
/** @ignore */
const extension_setIntervalValue = (vector, index, value) => {
    (vector.type.unit === extension_IntervalUnit.DAY_TIME)
        ? extension_setIntervalDayTime(vector, index, value)
        : extension_setIntervalYearMonth(vector, index, value);
};
/** @ignore */
const extension_setIntervalDayTime = ({ values }, index, value) => { values.set(value.subarray(0, 2), 2 * index); };
/** @ignore */
const extension_setIntervalYearMonth = ({ values }, index, value) => { values[index] = (value[0] * 12) + (value[1] % 12); };
/** @ignore */
const extension_setFixedSizeList = (vector, index, value) => {
    const child = vector.getChildAt(0), { stride } = vector;
    for (let idx = -1, offset = index * stride; ++idx < stride;) {
        child.set(offset + idx, value.get(idx));
    }
};
extension_SetVisitor.prototype.visitBool = extension_set_setBool;
extension_SetVisitor.prototype.visitInt = extension_setInt;
extension_SetVisitor.prototype.visitInt8 = extension_setNumeric;
extension_SetVisitor.prototype.visitInt16 = extension_setNumeric;
extension_SetVisitor.prototype.visitInt32 = extension_setNumeric;
extension_SetVisitor.prototype.visitInt64 = extension_setNumericX2;
extension_SetVisitor.prototype.visitUint8 = extension_setNumeric;
extension_SetVisitor.prototype.visitUint16 = extension_setNumeric;
extension_SetVisitor.prototype.visitUint32 = extension_setNumeric;
extension_SetVisitor.prototype.visitUint64 = extension_setNumericX2;
extension_SetVisitor.prototype.visitFloat = extension_setFloat;
extension_SetVisitor.prototype.visitFloat16 = extension_setFloat16;
extension_SetVisitor.prototype.visitFloat32 = extension_setNumeric;
extension_SetVisitor.prototype.visitFloat64 = extension_setNumeric;
extension_SetVisitor.prototype.visitUtf8 = extension_setUtf8;
extension_SetVisitor.prototype.visitBinary = extension_setBinary;
extension_SetVisitor.prototype.visitFixedSizeBinary = extension_setFixedSizeBinary;
extension_SetVisitor.prototype.visitDate = extension_setDate;
extension_SetVisitor.prototype.visitDateDay = extension_setDateDay;
extension_SetVisitor.prototype.visitDateMillisecond = extension_setDateMillisecond;
extension_SetVisitor.prototype.visitTimestamp = extension_setTimestamp;
extension_SetVisitor.prototype.visitTimestampSecond = extension_setTimestampSecond;
extension_SetVisitor.prototype.visitTimestampMillisecond = extension_setTimestampMillisecond;
extension_SetVisitor.prototype.visitTimestampMicrosecond = extension_setTimestampMicrosecond;
extension_SetVisitor.prototype.visitTimestampNanosecond = extension_setTimestampNanosecond;
extension_SetVisitor.prototype.visitTime = extension_setTime;
extension_SetVisitor.prototype.visitTimeSecond = extension_setTimeSecond;
extension_SetVisitor.prototype.visitTimeMillisecond = extension_setTimeMillisecond;
extension_SetVisitor.prototype.visitTimeMicrosecond = extension_setTimeMicrosecond;
extension_SetVisitor.prototype.visitTimeNanosecond = extension_setTimeNanosecond;
extension_SetVisitor.prototype.visitDecimal = extension_setDecimal;
extension_SetVisitor.prototype.visitList = extension_setList;
extension_SetVisitor.prototype.visitStruct = extension_setStruct;
extension_SetVisitor.prototype.visitUnion = extension_setUnion;
extension_SetVisitor.prototype.visitDenseUnion = extension_setDenseUnion;
extension_SetVisitor.prototype.visitSparseUnion = extension_setSparseUnion;
extension_SetVisitor.prototype.visitDictionary = extension_setDictionary;
extension_SetVisitor.prototype.visitInterval = extension_setIntervalValue;
extension_SetVisitor.prototype.visitIntervalDayTime = extension_setIntervalDayTime;
extension_SetVisitor.prototype.visitIntervalYearMonth = extension_setIntervalYearMonth;
extension_SetVisitor.prototype.visitFixedSizeList = extension_setFixedSizeList;
extension_SetVisitor.prototype.visitMap = extension_setMap;
/** @ignore */
const extension_set_instance = new extension_SetVisitor();

//# sourceMappingURL=set.mjs.map

;// ../../node_modules/apache-arrow/visitor/builderctor.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.



















/** @ignore */
class extension_GetBuilderCtor extends extension_Visitor {
    visitNull() { return extension_NullBuilder; }
    visitBool() { return extension_BoolBuilder; }
    visitInt() { return extension_IntBuilder; }
    visitInt8() { return extension_Int8Builder; }
    visitInt16() { return extension_Int16Builder; }
    visitInt32() { return extension_Int32Builder; }
    visitInt64() { return extension_Int64Builder; }
    visitUint8() { return extension_Uint8Builder; }
    visitUint16() { return extension_Uint16Builder; }
    visitUint32() { return extension_Uint32Builder; }
    visitUint64() { return extension_Uint64Builder; }
    visitFloat() { return extension_FloatBuilder; }
    visitFloat16() { return extension_Float16Builder; }
    visitFloat32() { return extension_Float32Builder; }
    visitFloat64() { return extension_Float64Builder; }
    visitUtf8() { return extension_Utf8Builder; }
    visitBinary() { return extension_BinaryBuilder; }
    visitFixedSizeBinary() { return extension_FixedSizeBinaryBuilder; }
    visitDate() { return extension_DateBuilder; }
    visitDateDay() { return extension_DateDayBuilder; }
    visitDateMillisecond() { return extension_DateMillisecondBuilder; }
    visitTimestamp() { return extension_TimestampBuilder; }
    visitTimestampSecond() { return extension_TimestampSecondBuilder; }
    visitTimestampMillisecond() { return extension_TimestampMillisecondBuilder; }
    visitTimestampMicrosecond() { return extension_TimestampMicrosecondBuilder; }
    visitTimestampNanosecond() { return extension_TimestampNanosecondBuilder; }
    visitTime() { return extension_TimeBuilder; }
    visitTimeSecond() { return extension_TimeSecondBuilder; }
    visitTimeMillisecond() { return extension_TimeMillisecondBuilder; }
    visitTimeMicrosecond() { return extension_TimeMicrosecondBuilder; }
    visitTimeNanosecond() { return extension_TimeNanosecondBuilder; }
    visitDecimal() { return extension_DecimalBuilder; }
    visitList() { return extension_ListBuilder; }
    visitStruct() { return extension_StructBuilder; }
    visitUnion() { return extension_UnionBuilder; }
    visitDenseUnion() { return extension_DenseUnionBuilder; }
    visitSparseUnion() { return extension_SparseUnionBuilder; }
    visitDictionary() { return extension_DictionaryBuilder; }
    visitInterval() { return extension_IntervalBuilder; }
    visitIntervalDayTime() { return extension_IntervalDayTimeBuilder; }
    visitIntervalYearMonth() { return extension_IntervalYearMonthBuilder; }
    visitFixedSizeList() { return extension_FixedSizeListBuilder; }
    visitMap() { return extension_MapBuilder; }
}
/** @ignore */
const extension_builderctor_instance = new extension_GetBuilderCtor();

//# sourceMappingURL=builderctor.mjs.map

;// ../../node_modules/apache-arrow/builder/index.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
/** @ignore */
























/** @nocollapse */
extension_Builder.new = extension_newBuilder;
function extension_newBuilder(options) {
    const type = options.type;
    const builder = new (extension_builderctor_instance.getVisitFn(type)())(options);
    if (type.children && type.children.length > 0) {
        const children = options['children'] || [];
        const defaultOptions = { 'nullValues': options['nullValues'] };
        const getChildOptions = Array.isArray(children)
            ? ((_, i) => children[i] || defaultOptions)
            : (({ name }) => children[name] || defaultOptions);
        type.children.forEach((field, index) => {
            const { type } = field;
            const opts = getChildOptions(field, index);
            builder.children.push(extension_newBuilder({ ...opts, type }));
        });
    }
    return builder;
}
Object.keys(extension_Type)
    .map((T) => extension_Type[T])
    .filter((T) => typeof T === 'number' && T !== extension_Type.NONE)
    .forEach((typeId) => {
    const BuilderCtor = extension_builderctor_instance.visit(typeId);
    BuilderCtor.prototype._setValue = extension_set_instance.getVisitFn(typeId);
});
extension_Utf8Builder.prototype._setValue = extension_set_instance.visitBinary;

//# sourceMappingURL=index.mjs.map

;// ../../node_modules/apache-arrow/fb/File.mjs
// automatically generated by the FlatBuffers compiler, do not modify

/**
 * ----------------------------------------------------------------------
 * Arrow File metadata
 *
 *
 * @constructor
 */
var extension_File_org;
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Footer {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Footer
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * @param flatbuffers.ByteBuffer bb
                     * @param Footer= obj
                     * @returns Footer
                     */
                    static getRootAsFooter(bb, obj) {
                        return (obj || new Footer).__init(bb.readInt32(bb.position()) + bb.position(), bb);
                    }
                    /**
                     * @returns org.apache.arrow.flatbuf.MetadataVersion
                     */
                    version() {
                        let offset = this.bb.__offset(this.bb_pos, 4);
                        return offset ? /**  */ (this.bb.readInt16(this.bb_pos + offset)) : extension_Schema_org.apache.arrow.flatbuf.MetadataVersion.V1;
                    }
                    /**
                     * @param org.apache.arrow.flatbuf.Schema= obj
                     * @returns org.apache.arrow.flatbuf.Schema|null
                     */
                    schema(obj) {
                        let offset = this.bb.__offset(this.bb_pos, 6);
                        return offset ? (obj || new extension_Schema_org.apache.arrow.flatbuf.Schema).__init(this.bb.__indirect(this.bb_pos + offset), this.bb) : null;
                    }
                    /**
                     * @param number index
                     * @param org.apache.arrow.flatbuf.Block= obj
                     * @returns org.apache.arrow.flatbuf.Block
                     */
                    dictionaries(index, obj) {
                        let offset = this.bb.__offset(this.bb_pos, 8);
                        return offset ? (obj || new org.apache.arrow.flatbuf.Block).__init(this.bb.__vector(this.bb_pos + offset) + index * 24, this.bb) : null;
                    }
                    /**
                     * @returns number
                     */
                    dictionariesLength() {
                        let offset = this.bb.__offset(this.bb_pos, 8);
                        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @param number index
                     * @param org.apache.arrow.flatbuf.Block= obj
                     * @returns org.apache.arrow.flatbuf.Block
                     */
                    recordBatches(index, obj) {
                        let offset = this.bb.__offset(this.bb_pos, 10);
                        return offset ? (obj || new org.apache.arrow.flatbuf.Block).__init(this.bb.__vector(this.bb_pos + offset) + index * 24, this.bb) : null;
                    }
                    /**
                     * @returns number
                     */
                    recordBatchesLength() {
                        let offset = this.bb.__offset(this.bb_pos, 10);
                        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     */
                    static startFooter(builder) {
                        builder.startObject(4);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param org.apache.arrow.flatbuf.MetadataVersion version
                     */
                    static addVersion(builder, version) {
                        builder.addFieldInt16(0, version, extension_Schema_org.apache.arrow.flatbuf.MetadataVersion.V1);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset schemaOffset
                     */
                    static addSchema(builder, schemaOffset) {
                        builder.addFieldOffset(1, schemaOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset dictionariesOffset
                     */
                    static addDictionaries(builder, dictionariesOffset) {
                        builder.addFieldOffset(2, dictionariesOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number numElems
                     */
                    static startDictionariesVector(builder, numElems) {
                        builder.startVector(24, numElems, 8);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset recordBatchesOffset
                     */
                    static addRecordBatches(builder, recordBatchesOffset) {
                        builder.addFieldOffset(3, recordBatchesOffset, 0);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param number numElems
                     */
                    static startRecordBatchesVector(builder, numElems) {
                        builder.startVector(24, numElems, 8);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @returns flatbuffers.Offset
                     */
                    static endFooter(builder) {
                        let offset = builder.endObject();
                        return offset;
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Offset offset
                     */
                    static finishFooterBuffer(builder, offset) {
                        builder.finish(offset);
                    }
                    static createFooter(builder, version, schemaOffset, dictionariesOffset, recordBatchesOffset) {
                        Footer.startFooter(builder);
                        Footer.addVersion(builder, version);
                        Footer.addSchema(builder, schemaOffset);
                        Footer.addDictionaries(builder, dictionariesOffset);
                        Footer.addRecordBatches(builder, recordBatchesOffset);
                        return Footer.endFooter(builder);
                    }
                }
                flatbuf.Footer = Footer;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_File_org || (extension_File_org = {}));
/**
 * @constructor
 */
(function (org) {
    var apache;
    (function (apache) {
        var arrow;
        (function (arrow) {
            var flatbuf;
            (function (flatbuf) {
                class Block {
                    constructor() {
                        this.bb = null;
                        this.bb_pos = 0;
                    }
                    /**
                     * @param number i
                     * @param flatbuffers.ByteBuffer bb
                     * @returns Block
                     */
                    __init(i, bb) {
                        this.bb_pos = i;
                        this.bb = bb;
                        return this;
                    }
                    /**
                     * Index to the start of the RecordBlock (note this is past the Message header)
                     *
                     * @returns flatbuffers.Long
                     */
                    offset() {
                        return this.bb.readInt64(this.bb_pos);
                    }
                    /**
                     * Length of the metadata
                     *
                     * @returns number
                     */
                    metaDataLength() {
                        return this.bb.readInt32(this.bb_pos + 8);
                    }
                    /**
                     * Length of the data (this is aligned so there can be a gap between this and
                     * the metatdata).
                     *
                     * @returns flatbuffers.Long
                     */
                    bodyLength() {
                        return this.bb.readInt64(this.bb_pos + 16);
                    }
                    /**
                     * @param flatbuffers.Builder builder
                     * @param flatbuffers.Long offset
                     * @param number metaDataLength
                     * @param flatbuffers.Long bodyLength
                     * @returns flatbuffers.Offset
                     */
                    static createBlock(builder, offset, metaDataLength, bodyLength) {
                        builder.prep(8, 24);
                        builder.writeInt64(bodyLength);
                        builder.pad(4);
                        builder.writeInt32(metaDataLength);
                        builder.writeInt64(offset);
                        return builder.offset();
                    }
                }
                flatbuf.Block = Block;
            })(flatbuf = arrow.flatbuf || (arrow.flatbuf = {}));
        })(arrow = apache.arrow || (apache.arrow = {}));
    })(apache = org.apache || (org.apache = {}));
})(extension_File_org || (extension_File_org = {}));

//# sourceMappingURL=File.mjs.map

;// ../../node_modules/apache-arrow/ipc/metadata/file.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
/* tslint:disable:class-name */


var extension_Long = extension_flatbuffers.Long;
var extension_file_Builder = extension_flatbuffers.Builder;
var extension_file_ByteBuffer = extension_flatbuffers.ByteBuffer;
var extension_Block = extension_File_org.apache.arrow.flatbuf.Block;
var extension_Footer = extension_File_org.apache.arrow.flatbuf.Footer;



/** @ignore */
class extension_Footer_ {
    constructor(schema, version = extension_MetadataVersion.V4, recordBatches, dictionaryBatches) {
        this.schema = schema;
        this.version = version;
        recordBatches && (this._recordBatches = recordBatches);
        dictionaryBatches && (this._dictionaryBatches = dictionaryBatches);
    }
    /** @nocollapse */
    static decode(buf) {
        buf = new extension_file_ByteBuffer(extension_toUint8Array(buf));
        const footer = extension_Footer.getRootAsFooter(buf);
        const schema = extension_Schema.decode(footer.schema());
        return new extension_OffHeapFooter(schema, footer);
    }
    /** @nocollapse */
    static encode(footer) {
        const b = new extension_file_Builder();
        const schemaOffset = extension_Schema.encode(b, footer.schema);
        extension_Footer.startRecordBatchesVector(b, footer.numRecordBatches);
        [...footer.recordBatches()].slice().reverse().forEach((rb) => extension_FileBlock.encode(b, rb));
        const recordBatchesOffset = b.endVector();
        extension_Footer.startDictionariesVector(b, footer.numDictionaries);
        [...footer.dictionaryBatches()].slice().reverse().forEach((db) => extension_FileBlock.encode(b, db));
        const dictionaryBatchesOffset = b.endVector();
        extension_Footer.startFooter(b);
        extension_Footer.addSchema(b, schemaOffset);
        extension_Footer.addVersion(b, extension_MetadataVersion.V4);
        extension_Footer.addRecordBatches(b, recordBatchesOffset);
        extension_Footer.addDictionaries(b, dictionaryBatchesOffset);
        extension_Footer.finishFooterBuffer(b, extension_Footer.endFooter(b));
        return b.asUint8Array();
    }
    get numRecordBatches() { return this._recordBatches.length; }
    get numDictionaries() { return this._dictionaryBatches.length; }
    *recordBatches() {
        for (let block, i = -1, n = this.numRecordBatches; ++i < n;) {
            if (block = this.getRecordBatch(i)) {
                yield block;
            }
        }
    }
    *dictionaryBatches() {
        for (let block, i = -1, n = this.numDictionaries; ++i < n;) {
            if (block = this.getDictionaryBatch(i)) {
                yield block;
            }
        }
    }
    getRecordBatch(index) {
        return index >= 0
            && index < this.numRecordBatches
            && this._recordBatches[index] || null;
    }
    getDictionaryBatch(index) {
        return index >= 0
            && index < this.numDictionaries
            && this._dictionaryBatches[index] || null;
    }
}

/** @ignore */
class extension_OffHeapFooter extends extension_Footer_ {
    constructor(schema, _footer) {
        super(schema, _footer.version());
        this._footer = _footer;
    }
    get numRecordBatches() { return this._footer.recordBatchesLength(); }
    get numDictionaries() { return this._footer.dictionariesLength(); }
    getRecordBatch(index) {
        if (index >= 0 && index < this.numRecordBatches) {
            const fileBlock = this._footer.recordBatches(index);
            if (fileBlock) {
                return extension_FileBlock.decode(fileBlock);
            }
        }
        return null;
    }
    getDictionaryBatch(index) {
        if (index >= 0 && index < this.numDictionaries) {
            const fileBlock = this._footer.dictionaries(index);
            if (fileBlock) {
                return extension_FileBlock.decode(fileBlock);
            }
        }
        return null;
    }
}
/** @ignore */
class extension_FileBlock {
    constructor(metaDataLength, bodyLength, offset) {
        this.metaDataLength = metaDataLength;
        this.offset = typeof offset === 'number' ? offset : offset.low;
        this.bodyLength = typeof bodyLength === 'number' ? bodyLength : bodyLength.low;
    }
    /** @nocollapse */
    static decode(block) {
        return new extension_FileBlock(block.metaDataLength(), block.bodyLength(), block.offset());
    }
    /** @nocollapse */
    static encode(b, fileBlock) {
        const { metaDataLength } = fileBlock;
        const offset = new extension_Long(fileBlock.offset, 0);
        const bodyLength = new extension_Long(fileBlock.bodyLength, 0);
        return extension_Block.createBlock(b, offset, metaDataLength, bodyLength);
    }
}

//# sourceMappingURL=file.mjs.map

;// ../../node_modules/apache-arrow/io/stream.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.





/** @ignore */
class extension_AsyncByteQueue extends extension_AsyncQueue {
    write(value) {
        if ((value = extension_toUint8Array(value)).byteLength > 0) {
            return super.write(value);
        }
    }
    toString(sync = false) {
        return sync
            ? extension_decodeUtf8(this.toUint8Array(true))
            : this.toUint8Array(false).then(extension_decodeUtf8);
    }
    toUint8Array(sync = false) {
        return sync ? extension_joinUint8Arrays(this._values)[0] : (async () => {
            let buffers = [], byteLength = 0;
            for await (const chunk of this) {
                buffers.push(chunk);
                byteLength += chunk.byteLength;
            }
            return extension_joinUint8Arrays(buffers, byteLength)[0];
        })();
    }
}
/** @ignore */
class extension_ByteStream {
    constructor(source) {
        if (source) {
            this.source = new extension_ByteStreamSource(extension_adapters.fromIterable(source));
        }
    }
    [Symbol.iterator]() { return this; }
    next(value) { return this.source.next(value); }
    throw(value) { return this.source.throw(value); }
    return(value) { return this.source.return(value); }
    peek(size) { return this.source.peek(size); }
    read(size) { return this.source.read(size); }
}
/** @ignore */
class extension_AsyncByteStream {
    constructor(source) {
        if (source instanceof extension_AsyncByteStream) {
            this.source = source.source;
        }
        else if (source instanceof extension_AsyncByteQueue) {
            this.source = new extension_AsyncByteStreamSource(extension_adapters.fromAsyncIterable(source));
        }
        else if (extension_isReadableNodeStream(source)) {
            this.source = new extension_AsyncByteStreamSource(extension_adapters.fromNodeStream(source));
        }
        else if (extension_isReadableDOMStream(source)) {
            this.source = new extension_AsyncByteStreamSource(extension_adapters.fromDOMStream(source));
        }
        else if (extension_isFetchResponse(source)) {
            this.source = new extension_AsyncByteStreamSource(extension_adapters.fromDOMStream(source.body));
        }
        else if (extension_isIterable(source)) {
            this.source = new extension_AsyncByteStreamSource(extension_adapters.fromIterable(source));
        }
        else if (extension_isPromise(source)) {
            this.source = new extension_AsyncByteStreamSource(extension_adapters.fromAsyncIterable(source));
        }
        else if (extension_isAsyncIterable(source)) {
            this.source = new extension_AsyncByteStreamSource(extension_adapters.fromAsyncIterable(source));
        }
    }
    [Symbol.asyncIterator]() { return this; }
    next(value) { return this.source.next(value); }
    throw(value) { return this.source.throw(value); }
    return(value) { return this.source.return(value); }
    get closed() { return this.source.closed; }
    cancel(reason) { return this.source.cancel(reason); }
    peek(size) { return this.source.peek(size); }
    read(size) { return this.source.read(size); }
}
/** @ignore */
class extension_ByteStreamSource {
    constructor(source) {
        this.source = source;
    }
    cancel(reason) { this.return(reason); }
    peek(size) { return this.next(size, 'peek').value; }
    read(size) { return this.next(size, 'read').value; }
    next(size, cmd = 'read') { return this.source.next({ cmd, size }); }
    throw(value) { return Object.create((this.source.throw && this.source.throw(value)) || extension_ITERATOR_DONE); }
    return(value) { return Object.create((this.source.return && this.source.return(value)) || extension_ITERATOR_DONE); }
}
/** @ignore */
class extension_AsyncByteStreamSource {
    constructor(source) {
        this.source = source;
        this._closedPromise = new Promise((r) => this._closedPromiseResolve = r);
    }
    async cancel(reason) { await this.return(reason); }
    get closed() { return this._closedPromise; }
    async read(size) { return (await this.next(size, 'read')).value; }
    async peek(size) { return (await this.next(size, 'peek')).value; }
    async next(size, cmd = 'read') { return (await this.source.next({ cmd, size })); }
    async throw(value) {
        const result = (this.source.throw && await this.source.throw(value)) || extension_ITERATOR_DONE;
        this._closedPromiseResolve && this._closedPromiseResolve();
        this._closedPromiseResolve = undefined;
        return Object.create(result);
    }
    async return(value) {
        const result = (this.source.return && await this.source.return(value)) || extension_ITERATOR_DONE;
        this._closedPromiseResolve && this._closedPromiseResolve();
        this._closedPromiseResolve = undefined;
        return Object.create(result);
    }
}

//# sourceMappingURL=stream.mjs.map

;// ../../node_modules/apache-arrow/io/file.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore */
class extension_RandomAccessFile extends extension_ByteStream {
    constructor(buffer, byteLength) {
        super();
        this.position = 0;
        this.buffer = extension_toUint8Array(buffer);
        this.size = typeof byteLength === 'undefined' ? this.buffer.byteLength : byteLength;
    }
    readInt32(position) {
        const { buffer, byteOffset } = this.readAt(position, 4);
        return new DataView(buffer, byteOffset).getInt32(0, true);
    }
    seek(position) {
        this.position = Math.min(position, this.size);
        return position < this.size;
    }
    read(nBytes) {
        const { buffer, size, position } = this;
        if (buffer && position < size) {
            if (typeof nBytes !== 'number') {
                nBytes = Infinity;
            }
            this.position = Math.min(size, position + Math.min(size - position, nBytes));
            return buffer.subarray(position, this.position);
        }
        return null;
    }
    readAt(position, nBytes) {
        const buf = this.buffer;
        const end = Math.min(this.size, position + nBytes);
        return buf ? buf.subarray(position, end) : new Uint8Array(nBytes);
    }
    close() { this.buffer && (this.buffer = null); }
    throw(value) { this.close(); return { done: true, value }; }
    return(value) { this.close(); return { done: true, value }; }
}
/** @ignore */
class extension_AsyncRandomAccessFile extends extension_AsyncByteStream {
    constructor(file, byteLength) {
        super();
        this.position = 0;
        this._handle = file;
        if (typeof byteLength === 'number') {
            this.size = byteLength;
        }
        else {
            this._pending = (async () => {
                this.size = (await file.stat()).size;
                delete this._pending;
            })();
        }
    }
    async readInt32(position) {
        const { buffer, byteOffset } = await this.readAt(position, 4);
        return new DataView(buffer, byteOffset).getInt32(0, true);
    }
    async seek(position) {
        this._pending && await this._pending;
        this.position = Math.min(position, this.size);
        return position < this.size;
    }
    async read(nBytes) {
        this._pending && await this._pending;
        const { _handle: file, size, position } = this;
        if (file && position < size) {
            if (typeof nBytes !== 'number') {
                nBytes = Infinity;
            }
            let pos = position, offset = 0, bytesRead = 0;
            let end = Math.min(size, pos + Math.min(size - pos, nBytes));
            let buffer = new Uint8Array(Math.max(0, (this.position = end) - pos));
            while ((pos += bytesRead) < end && (offset += bytesRead) < buffer.byteLength) {
                ({ bytesRead } = await file.read(buffer, offset, buffer.byteLength - offset, pos));
            }
            return buffer;
        }
        return null;
    }
    async readAt(position, nBytes) {
        this._pending && await this._pending;
        const { _handle: file, size } = this;
        if (file && (position + nBytes) < size) {
            const end = Math.min(size, position + nBytes);
            const buffer = new Uint8Array(end - position);
            return (await file.read(buffer, 0, nBytes, position)).buffer;
        }
        return new Uint8Array(nBytes);
    }
    async close() { const f = this._handle; this._handle = null; f && await f.close(); }
    async throw(value) { await this.close(); return { done: true, value }; }
    async return(value) { await this.close(); return { done: true, value }; }
}

//# sourceMappingURL=file.mjs.map

;// ../../node_modules/apache-arrow/util/int.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
/** @ignore */
const extension_carryBit16 = 1 << 16;
/** @ignore */
function extension_intAsHex(value) {
    if (value < 0) {
        value = 0xFFFFFFFF + value + 1;
    }
    return `0x${value.toString(16)}`;
}
/** @ignore */
const extension_kInt32DecimalDigits = 8;
/** @ignore */
const extension_kPowersOfTen = [1,
    10,
    100,
    1000,
    10000,
    100000,
    1000000,
    10000000,
    100000000];
/** @ignore */
class extension_BaseInt64 {
    constructor(buffer) {
        this.buffer = buffer;
    }
    high() { return this.buffer[1]; }
    low() { return this.buffer[0]; }
    _times(other) {
        // Break the left and right numbers into 16 bit chunks
        // so that we can multiply them without overflow.
        const L = new Uint32Array([
            this.buffer[1] >>> 16,
            this.buffer[1] & 0xFFFF,
            this.buffer[0] >>> 16,
            this.buffer[0] & 0xFFFF
        ]);
        const R = new Uint32Array([
            other.buffer[1] >>> 16,
            other.buffer[1] & 0xFFFF,
            other.buffer[0] >>> 16,
            other.buffer[0] & 0xFFFF
        ]);
        let product = L[3] * R[3];
        this.buffer[0] = product & 0xFFFF;
        let sum = product >>> 16;
        product = L[2] * R[3];
        sum += product;
        product = (L[3] * R[2]) >>> 0;
        sum += product;
        this.buffer[0] += sum << 16;
        this.buffer[1] = (sum >>> 0 < product ? extension_carryBit16 : 0);
        this.buffer[1] += sum >>> 16;
        this.buffer[1] += L[1] * R[3] + L[2] * R[2] + L[3] * R[1];
        this.buffer[1] += (L[0] * R[3] + L[1] * R[2] + L[2] * R[1] + L[3] * R[0]) << 16;
        return this;
    }
    _plus(other) {
        const sum = (this.buffer[0] + other.buffer[0]) >>> 0;
        this.buffer[1] += other.buffer[1];
        if (sum < (this.buffer[0] >>> 0)) {
            ++this.buffer[1];
        }
        this.buffer[0] = sum;
    }
    lessThan(other) {
        return this.buffer[1] < other.buffer[1] ||
            (this.buffer[1] === other.buffer[1] && this.buffer[0] < other.buffer[0]);
    }
    equals(other) {
        return this.buffer[1] === other.buffer[1] && this.buffer[0] == other.buffer[0];
    }
    greaterThan(other) {
        return other.lessThan(this);
    }
    hex() {
        return `${extension_intAsHex(this.buffer[1])} ${extension_intAsHex(this.buffer[0])}`;
    }
}
/** @ignore */
class extension_int_Uint64 extends extension_BaseInt64 {
    times(other) {
        this._times(other);
        return this;
    }
    plus(other) {
        this._plus(other);
        return this;
    }
    /** @nocollapse */
    static from(val, out_buffer = new Uint32Array(2)) {
        return extension_int_Uint64.fromString(typeof (val) === 'string' ? val : val.toString(), out_buffer);
    }
    /** @nocollapse */
    static fromNumber(num, out_buffer = new Uint32Array(2)) {
        // Always parse numbers as strings - pulling out high and low bits
        // directly seems to lose precision sometimes
        // For example:
        //     > -4613034156400212000 >>> 0
        //     721782784
        // The correct lower 32-bits are 721782752
        return extension_int_Uint64.fromString(num.toString(), out_buffer);
    }
    /** @nocollapse */
    static fromString(str, out_buffer = new Uint32Array(2)) {
        const length = str.length;
        let out = new extension_int_Uint64(out_buffer);
        for (let posn = 0; posn < length;) {
            const group = extension_kInt32DecimalDigits < length - posn ?
                extension_kInt32DecimalDigits : length - posn;
            const chunk = new extension_int_Uint64(new Uint32Array([parseInt(str.substr(posn, group), 10), 0]));
            const multiple = new extension_int_Uint64(new Uint32Array([extension_kPowersOfTen[group], 0]));
            out.times(multiple);
            out.plus(chunk);
            posn += group;
        }
        return out;
    }
    /** @nocollapse */
    static convertArray(values) {
        const data = new Uint32Array(values.length * 2);
        for (let i = -1, n = values.length; ++i < n;) {
            extension_int_Uint64.from(values[i], new Uint32Array(data.buffer, data.byteOffset + 2 * i * 4, 2));
        }
        return data;
    }
    /** @nocollapse */
    static multiply(left, right) {
        let rtrn = new extension_int_Uint64(new Uint32Array(left.buffer));
        return rtrn.times(right);
    }
    /** @nocollapse */
    static add(left, right) {
        let rtrn = new extension_int_Uint64(new Uint32Array(left.buffer));
        return rtrn.plus(right);
    }
}
/** @ignore */
class extension_int_Int64 extends extension_BaseInt64 {
    negate() {
        this.buffer[0] = ~this.buffer[0] + 1;
        this.buffer[1] = ~this.buffer[1];
        if (this.buffer[0] == 0) {
            ++this.buffer[1];
        }
        return this;
    }
    times(other) {
        this._times(other);
        return this;
    }
    plus(other) {
        this._plus(other);
        return this;
    }
    lessThan(other) {
        // force high bytes to be signed
        const this_high = this.buffer[1] << 0;
        const other_high = other.buffer[1] << 0;
        return this_high < other_high ||
            (this_high === other_high && this.buffer[0] < other.buffer[0]);
    }
    /** @nocollapse */
    static from(val, out_buffer = new Uint32Array(2)) {
        return extension_int_Int64.fromString(typeof (val) === 'string' ? val : val.toString(), out_buffer);
    }
    /** @nocollapse */
    static fromNumber(num, out_buffer = new Uint32Array(2)) {
        // Always parse numbers as strings - pulling out high and low bits
        // directly seems to lose precision sometimes
        // For example:
        //     > -4613034156400212000 >>> 0
        //     721782784
        // The correct lower 32-bits are 721782752
        return extension_int_Int64.fromString(num.toString(), out_buffer);
    }
    /** @nocollapse */
    static fromString(str, out_buffer = new Uint32Array(2)) {
        // TODO: Assert that out_buffer is 0 and length = 2
        const negate = str.startsWith('-');
        const length = str.length;
        let out = new extension_int_Int64(out_buffer);
        for (let posn = negate ? 1 : 0; posn < length;) {
            const group = extension_kInt32DecimalDigits < length - posn ?
                extension_kInt32DecimalDigits : length - posn;
            const chunk = new extension_int_Int64(new Uint32Array([parseInt(str.substr(posn, group), 10), 0]));
            const multiple = new extension_int_Int64(new Uint32Array([extension_kPowersOfTen[group], 0]));
            out.times(multiple);
            out.plus(chunk);
            posn += group;
        }
        return negate ? out.negate() : out;
    }
    /** @nocollapse */
    static convertArray(values) {
        const data = new Uint32Array(values.length * 2);
        for (let i = -1, n = values.length; ++i < n;) {
            extension_int_Int64.from(values[i], new Uint32Array(data.buffer, data.byteOffset + 2 * i * 4, 2));
        }
        return data;
    }
    /** @nocollapse */
    static multiply(left, right) {
        let rtrn = new extension_int_Int64(new Uint32Array(left.buffer));
        return rtrn.times(right);
    }
    /** @nocollapse */
    static add(left, right) {
        let rtrn = new extension_int_Int64(new Uint32Array(left.buffer));
        return rtrn.plus(right);
    }
}
/** @ignore */
class extension_Int128 {
    constructor(buffer) {
        this.buffer = buffer;
        // buffer[3] MSB (high)
        // buffer[2]
        // buffer[1]
        // buffer[0] LSB (low)
    }
    high() {
        return new extension_int_Int64(new Uint32Array(this.buffer.buffer, this.buffer.byteOffset + 8, 2));
    }
    low() {
        return new extension_int_Int64(new Uint32Array(this.buffer.buffer, this.buffer.byteOffset, 2));
    }
    negate() {
        this.buffer[0] = ~this.buffer[0] + 1;
        this.buffer[1] = ~this.buffer[1];
        this.buffer[2] = ~this.buffer[2];
        this.buffer[3] = ~this.buffer[3];
        if (this.buffer[0] == 0) {
            ++this.buffer[1];
        }
        if (this.buffer[1] == 0) {
            ++this.buffer[2];
        }
        if (this.buffer[2] == 0) {
            ++this.buffer[3];
        }
        return this;
    }
    times(other) {
        // Break the left and right numbers into 32 bit chunks
        // so that we can multiply them without overflow.
        const L0 = new extension_int_Uint64(new Uint32Array([this.buffer[3], 0]));
        const L1 = new extension_int_Uint64(new Uint32Array([this.buffer[2], 0]));
        const L2 = new extension_int_Uint64(new Uint32Array([this.buffer[1], 0]));
        const L3 = new extension_int_Uint64(new Uint32Array([this.buffer[0], 0]));
        const R0 = new extension_int_Uint64(new Uint32Array([other.buffer[3], 0]));
        const R1 = new extension_int_Uint64(new Uint32Array([other.buffer[2], 0]));
        const R2 = new extension_int_Uint64(new Uint32Array([other.buffer[1], 0]));
        const R3 = new extension_int_Uint64(new Uint32Array([other.buffer[0], 0]));
        let product = extension_int_Uint64.multiply(L3, R3);
        this.buffer[0] = product.low();
        let sum = new extension_int_Uint64(new Uint32Array([product.high(), 0]));
        product = extension_int_Uint64.multiply(L2, R3);
        sum.plus(product);
        product = extension_int_Uint64.multiply(L3, R2);
        sum.plus(product);
        this.buffer[1] = sum.low();
        this.buffer[3] = (sum.lessThan(product) ? 1 : 0);
        this.buffer[2] = sum.high();
        let high = new extension_int_Uint64(new Uint32Array(this.buffer.buffer, this.buffer.byteOffset + 8, 2));
        high.plus(extension_int_Uint64.multiply(L1, R3))
            .plus(extension_int_Uint64.multiply(L2, R2))
            .plus(extension_int_Uint64.multiply(L3, R1));
        this.buffer[3] += extension_int_Uint64.multiply(L0, R3)
            .plus(extension_int_Uint64.multiply(L1, R2))
            .plus(extension_int_Uint64.multiply(L2, R1))
            .plus(extension_int_Uint64.multiply(L3, R0)).low();
        return this;
    }
    plus(other) {
        let sums = new Uint32Array(4);
        sums[3] = (this.buffer[3] + other.buffer[3]) >>> 0;
        sums[2] = (this.buffer[2] + other.buffer[2]) >>> 0;
        sums[1] = (this.buffer[1] + other.buffer[1]) >>> 0;
        sums[0] = (this.buffer[0] + other.buffer[0]) >>> 0;
        if (sums[0] < (this.buffer[0] >>> 0)) {
            ++sums[1];
        }
        if (sums[1] < (this.buffer[1] >>> 0)) {
            ++sums[2];
        }
        if (sums[2] < (this.buffer[2] >>> 0)) {
            ++sums[3];
        }
        this.buffer[3] = sums[3];
        this.buffer[2] = sums[2];
        this.buffer[1] = sums[1];
        this.buffer[0] = sums[0];
        return this;
    }
    hex() {
        return `${extension_intAsHex(this.buffer[3])} ${extension_intAsHex(this.buffer[2])} ${extension_intAsHex(this.buffer[1])} ${extension_intAsHex(this.buffer[0])}`;
    }
    /** @nocollapse */
    static multiply(left, right) {
        let rtrn = new extension_Int128(new Uint32Array(left.buffer));
        return rtrn.times(right);
    }
    /** @nocollapse */
    static add(left, right) {
        let rtrn = new extension_Int128(new Uint32Array(left.buffer));
        return rtrn.plus(right);
    }
    /** @nocollapse */
    static from(val, out_buffer = new Uint32Array(4)) {
        return extension_Int128.fromString(typeof (val) === 'string' ? val : val.toString(), out_buffer);
    }
    /** @nocollapse */
    static fromNumber(num, out_buffer = new Uint32Array(4)) {
        // Always parse numbers as strings - pulling out high and low bits
        // directly seems to lose precision sometimes
        // For example:
        //     > -4613034156400212000 >>> 0
        //     721782784
        // The correct lower 32-bits are 721782752
        return extension_Int128.fromString(num.toString(), out_buffer);
    }
    /** @nocollapse */
    static fromString(str, out_buffer = new Uint32Array(4)) {
        // TODO: Assert that out_buffer is 0 and length = 4
        const negate = str.startsWith('-');
        const length = str.length;
        let out = new extension_Int128(out_buffer);
        for (let posn = negate ? 1 : 0; posn < length;) {
            const group = extension_kInt32DecimalDigits < length - posn ?
                extension_kInt32DecimalDigits : length - posn;
            const chunk = new extension_Int128(new Uint32Array([parseInt(str.substr(posn, group), 10), 0, 0, 0]));
            const multiple = new extension_Int128(new Uint32Array([extension_kPowersOfTen[group], 0, 0, 0]));
            out.times(multiple);
            out.plus(chunk);
            posn += group;
        }
        return negate ? out.negate() : out;
    }
    /** @nocollapse */
    static convertArray(values) {
        // TODO: Distinguish between string and number at compile-time
        const data = new Uint32Array(values.length * 4);
        for (let i = -1, n = values.length; ++i < n;) {
            extension_Int128.from(values[i], new Uint32Array(data.buffer, data.byteOffset + 4 * 4 * i, 4));
        }
        return data;
    }
}

//# sourceMappingURL=int.mjs.map

;// ../../node_modules/apache-arrow/visitor/vectorloader.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.









/** @ignore */
class extension_VectorLoader extends extension_Visitor {
    constructor(bytes, nodes, buffers, dictionaries) {
        super();
        this.nodesIndex = -1;
        this.buffersIndex = -1;
        this.bytes = bytes;
        this.nodes = nodes;
        this.buffers = buffers;
        this.dictionaries = dictionaries;
    }
    visit(node) {
        return super.visit(node instanceof extension_Field ? node.type : node);
    }
    visitNull(type, { length, } = this.nextFieldNode()) { return extension_Data.Null(type, 0, length); }
    visitBool(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Bool(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readData(type)); }
    visitInt(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Int(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readData(type)); }
    visitFloat(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Float(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readData(type)); }
    visitUtf8(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Utf8(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readOffsets(type), this.readData(type)); }
    visitBinary(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Binary(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readOffsets(type), this.readData(type)); }
    visitFixedSizeBinary(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.FixedSizeBinary(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readData(type)); }
    visitDate(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Date(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readData(type)); }
    visitTimestamp(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Timestamp(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readData(type)); }
    visitTime(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Time(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readData(type)); }
    visitDecimal(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Decimal(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readData(type)); }
    visitList(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.List(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readOffsets(type), this.visit(type.children[0])); }
    visitStruct(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Struct(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.visitMany(type.children)); }
    visitUnion(type) { return type.mode === extension_UnionMode.Sparse ? this.visitSparseUnion(type) : this.visitDenseUnion(type); }
    visitDenseUnion(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Union(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readTypeIds(type), this.readOffsets(type), this.visitMany(type.children)); }
    visitSparseUnion(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Union(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readTypeIds(type), this.visitMany(type.children)); }
    visitDictionary(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Dictionary(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readData(type.indices), this.readDictionary(type)); }
    visitInterval(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Interval(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readData(type)); }
    visitFixedSizeList(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.FixedSizeList(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.visit(type.children[0])); }
    visitMap(type, { length, nullCount } = this.nextFieldNode()) { return extension_Data.Map(type, 0, length, nullCount, this.readNullBitmap(type, nullCount), this.readOffsets(type), this.visit(type.children[0])); }
    nextFieldNode() { return this.nodes[++this.nodesIndex]; }
    nextBufferRange() { return this.buffers[++this.buffersIndex]; }
    readNullBitmap(type, nullCount, buffer = this.nextBufferRange()) {
        return nullCount > 0 && this.readData(type, buffer) || new Uint8Array(0);
    }
    readOffsets(type, buffer) { return this.readData(type, buffer); }
    readTypeIds(type, buffer) { return this.readData(type, buffer); }
    readData(_type, { length, offset } = this.nextBufferRange()) {
        return this.bytes.subarray(offset, offset + length);
    }
    readDictionary(type) {
        return this.dictionaries.get(type.id);
    }
}
/** @ignore */
class extension_JSONVectorLoader extends extension_VectorLoader {
    constructor(sources, nodes, buffers, dictionaries) {
        super(new Uint8Array(0), nodes, buffers, dictionaries);
        this.sources = sources;
    }
    readNullBitmap(_type, nullCount, { offset } = this.nextBufferRange()) {
        return nullCount <= 0 ? new Uint8Array(0) : extension_packBools(this.sources[offset]);
    }
    readOffsets(_type, { offset } = this.nextBufferRange()) {
        return extension_toArrayBufferView(Uint8Array, extension_toArrayBufferView(Int32Array, this.sources[offset]));
    }
    readTypeIds(type, { offset } = this.nextBufferRange()) {
        return extension_toArrayBufferView(Uint8Array, extension_toArrayBufferView(type.ArrayType, this.sources[offset]));
    }
    readData(type, { offset } = this.nextBufferRange()) {
        const { sources } = this;
        if (extension_DataType.isTimestamp(type)) {
            return extension_toArrayBufferView(Uint8Array, extension_int_Int64.convertArray(sources[offset]));
        }
        else if ((extension_DataType.isInt(type) || extension_DataType.isTime(type)) && type.bitWidth === 64) {
            return extension_toArrayBufferView(Uint8Array, extension_int_Int64.convertArray(sources[offset]));
        }
        else if (extension_DataType.isDate(type) && type.unit === extension_DateUnit.MILLISECOND) {
            return extension_toArrayBufferView(Uint8Array, extension_int_Int64.convertArray(sources[offset]));
        }
        else if (extension_DataType.isDecimal(type)) {
            return extension_toArrayBufferView(Uint8Array, extension_Int128.convertArray(sources[offset]));
        }
        else if (extension_DataType.isBinary(type) || extension_DataType.isFixedSizeBinary(type)) {
            return extension_binaryDataFromJSON(sources[offset]);
        }
        else if (extension_DataType.isBool(type)) {
            return extension_packBools(sources[offset]);
        }
        else if (extension_DataType.isUtf8(type)) {
            return extension_encodeUtf8(sources[offset].join(''));
        }
        return extension_toArrayBufferView(Uint8Array, extension_toArrayBufferView(type.ArrayType, sources[offset].map((x) => +x)));
    }
}
/** @ignore */
function extension_binaryDataFromJSON(values) {
    // "DATA": ["49BC7D5B6C47D2","3F5FB6D9322026"]
    // There are definitely more efficient ways to do this... but it gets the
    // job done.
    const joined = values.join('');
    const data = new Uint8Array(joined.length / 2);
    for (let i = 0; i < joined.length; i += 2) {
        data[i >> 1] = parseInt(joined.substr(i, 2), 16);
    }
    return data;
}

//# sourceMappingURL=vectorloader.mjs.map

;// ../../node_modules/apache-arrow/visitor/typeassembler.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

var extension_typeassembler_Long = extension_flatbuffers.Long;


var extension_typeassembler_Null = extension_Schema_org.apache.arrow.flatbuf.Null;
var extension_Int = extension_Schema_org.apache.arrow.flatbuf.Int;
var extension_FloatingPoint = extension_Schema_org.apache.arrow.flatbuf.FloatingPoint;
var extension_typeassembler_Binary = extension_Schema_org.apache.arrow.flatbuf.Binary;
var extension_typeassembler_Bool = extension_Schema_org.apache.arrow.flatbuf.Bool;
var extension_typeassembler_Utf8 = extension_Schema_org.apache.arrow.flatbuf.Utf8;
var extension_typeassembler_Decimal = extension_Schema_org.apache.arrow.flatbuf.Decimal;
var extension_typeassembler_Date = extension_Schema_org.apache.arrow.flatbuf.Date;
var extension_Time = extension_Schema_org.apache.arrow.flatbuf.Time;
var extension_Timestamp = extension_Schema_org.apache.arrow.flatbuf.Timestamp;
var extension_Interval = extension_Schema_org.apache.arrow.flatbuf.Interval;
var extension_typeassembler_List = extension_Schema_org.apache.arrow.flatbuf.List;
var extension_typeassembler_Struct = extension_Schema_org.apache.arrow.flatbuf.Struct_;
var extension_Union = extension_Schema_org.apache.arrow.flatbuf.Union;
var extension_DictionaryEncoding = extension_Schema_org.apache.arrow.flatbuf.DictionaryEncoding;
var extension_typeassembler_FixedSizeBinary = extension_Schema_org.apache.arrow.flatbuf.FixedSizeBinary;
var extension_typeassembler_FixedSizeList = extension_Schema_org.apache.arrow.flatbuf.FixedSizeList;
var extension_typeassembler_Map_ = extension_Schema_org.apache.arrow.flatbuf.Map;
/** @ignore */
class extension_TypeAssembler extends extension_Visitor {
    visit(node, builder) {
        return (node == null || builder == null) ? undefined : super.visit(node, builder);
    }
    visitNull(_node, b) {
        extension_typeassembler_Null.startNull(b);
        return extension_typeassembler_Null.endNull(b);
    }
    visitInt(node, b) {
        extension_Int.startInt(b);
        extension_Int.addBitWidth(b, node.bitWidth);
        extension_Int.addIsSigned(b, node.isSigned);
        return extension_Int.endInt(b);
    }
    visitFloat(node, b) {
        extension_FloatingPoint.startFloatingPoint(b);
        extension_FloatingPoint.addPrecision(b, node.precision);
        return extension_FloatingPoint.endFloatingPoint(b);
    }
    visitBinary(_node, b) {
        extension_typeassembler_Binary.startBinary(b);
        return extension_typeassembler_Binary.endBinary(b);
    }
    visitBool(_node, b) {
        extension_typeassembler_Bool.startBool(b);
        return extension_typeassembler_Bool.endBool(b);
    }
    visitUtf8(_node, b) {
        extension_typeassembler_Utf8.startUtf8(b);
        return extension_typeassembler_Utf8.endUtf8(b);
    }
    visitDecimal(node, b) {
        extension_typeassembler_Decimal.startDecimal(b);
        extension_typeassembler_Decimal.addScale(b, node.scale);
        extension_typeassembler_Decimal.addPrecision(b, node.precision);
        return extension_typeassembler_Decimal.endDecimal(b);
    }
    visitDate(node, b) {
        extension_typeassembler_Date.startDate(b);
        extension_typeassembler_Date.addUnit(b, node.unit);
        return extension_typeassembler_Date.endDate(b);
    }
    visitTime(node, b) {
        extension_Time.startTime(b);
        extension_Time.addUnit(b, node.unit);
        extension_Time.addBitWidth(b, node.bitWidth);
        return extension_Time.endTime(b);
    }
    visitTimestamp(node, b) {
        const timezone = (node.timezone && b.createString(node.timezone)) || undefined;
        extension_Timestamp.startTimestamp(b);
        extension_Timestamp.addUnit(b, node.unit);
        if (timezone !== undefined) {
            extension_Timestamp.addTimezone(b, timezone);
        }
        return extension_Timestamp.endTimestamp(b);
    }
    visitInterval(node, b) {
        extension_Interval.startInterval(b);
        extension_Interval.addUnit(b, node.unit);
        return extension_Interval.endInterval(b);
    }
    visitList(_node, b) {
        extension_typeassembler_List.startList(b);
        return extension_typeassembler_List.endList(b);
    }
    visitStruct(_node, b) {
        extension_typeassembler_Struct.startStruct_(b);
        return extension_typeassembler_Struct.endStruct_(b);
    }
    visitUnion(node, b) {
        extension_Union.startTypeIdsVector(b, node.typeIds.length);
        const typeIds = extension_Union.createTypeIdsVector(b, node.typeIds);
        extension_Union.startUnion(b);
        extension_Union.addMode(b, node.mode);
        extension_Union.addTypeIds(b, typeIds);
        return extension_Union.endUnion(b);
    }
    visitDictionary(node, b) {
        const indexType = this.visit(node.indices, b);
        extension_DictionaryEncoding.startDictionaryEncoding(b);
        extension_DictionaryEncoding.addId(b, new extension_typeassembler_Long(node.id, 0));
        extension_DictionaryEncoding.addIsOrdered(b, node.isOrdered);
        if (indexType !== undefined) {
            extension_DictionaryEncoding.addIndexType(b, indexType);
        }
        return extension_DictionaryEncoding.endDictionaryEncoding(b);
    }
    visitFixedSizeBinary(node, b) {
        extension_typeassembler_FixedSizeBinary.startFixedSizeBinary(b);
        extension_typeassembler_FixedSizeBinary.addByteWidth(b, node.byteWidth);
        return extension_typeassembler_FixedSizeBinary.endFixedSizeBinary(b);
    }
    visitFixedSizeList(node, b) {
        extension_typeassembler_FixedSizeList.startFixedSizeList(b);
        extension_typeassembler_FixedSizeList.addListSize(b, node.listSize);
        return extension_typeassembler_FixedSizeList.endFixedSizeList(b);
    }
    visitMap(node, b) {
        extension_typeassembler_Map_.startMap(b);
        extension_typeassembler_Map_.addKeysSorted(b, node.keysSorted);
        return extension_typeassembler_Map_.endMap(b);
    }
}
/** @ignore */
const extension_typeassembler_instance = new extension_TypeAssembler();

//# sourceMappingURL=typeassembler.mjs.map

;// ../../node_modules/apache-arrow/ipc/metadata/json.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
function extension_schemaFromJSON(_schema, dictionaries = new Map()) {
    return new extension_Schema(extension_schemaFieldsFromJSON(_schema, dictionaries), extension_customMetadataFromJSON(_schema['customMetadata']), dictionaries);
}
/** @ignore */
function extension_recordBatchFromJSON(b) {
    return new src_extension_RecordBatch(b['count'], extension_fieldNodesFromJSON(b['columns']), extension_buffersFromJSON(b['columns']));
}
/** @ignore */
function extension_dictionaryBatchFromJSON(b) {
    return new src_extension_DictionaryBatch(extension_recordBatchFromJSON(b['data']), b['id'], b['isDelta']);
}
/** @ignore */
function extension_schemaFieldsFromJSON(_schema, dictionaries) {
    return (_schema['fields'] || []).filter(Boolean).map((f) => extension_Field.fromJSON(f, dictionaries));
}
/** @ignore */
function extension_fieldChildrenFromJSON(_field, dictionaries) {
    return (_field['children'] || []).filter(Boolean).map((f) => extension_Field.fromJSON(f, dictionaries));
}
/** @ignore */
function extension_fieldNodesFromJSON(xs) {
    return (xs || []).reduce((fieldNodes, column) => [
        ...fieldNodes,
        new src_extension_FieldNode(column['count'], extension_nullCountFromJSON(column['VALIDITY'])),
        ...extension_fieldNodesFromJSON(column['children'])
    ], []);
}
/** @ignore */
function extension_buffersFromJSON(xs, buffers = []) {
    for (let i = -1, n = (xs || []).length; ++i < n;) {
        const column = xs[i];
        column['VALIDITY'] && buffers.push(new extension_BufferRegion(buffers.length, column['VALIDITY'].length));
        column['TYPE'] && buffers.push(new extension_BufferRegion(buffers.length, column['TYPE'].length));
        column['OFFSET'] && buffers.push(new extension_BufferRegion(buffers.length, column['OFFSET'].length));
        column['DATA'] && buffers.push(new extension_BufferRegion(buffers.length, column['DATA'].length));
        buffers = extension_buffersFromJSON(column['children'], buffers);
    }
    return buffers;
}
/** @ignore */
function extension_nullCountFromJSON(validity) {
    return (validity || []).reduce((sum, val) => sum + +(val === 0), 0);
}
/** @ignore */
function extension_fieldFromJSON(_field, dictionaries) {
    let id;
    let keys;
    let field;
    let dictMeta;
    let type;
    let dictType;
    // If no dictionary encoding
    if (!dictionaries || !(dictMeta = _field['dictionary'])) {
        type = extension_typeFromJSON(_field, extension_fieldChildrenFromJSON(_field, dictionaries));
        field = new extension_Field(_field['name'], type, _field['nullable'], extension_customMetadataFromJSON(_field['customMetadata']));
    }
    // tslint:disable
    // If dictionary encoded and the first time we've seen this dictionary id, decode
    // the data type and child fields, then wrap in a Dictionary type and insert the
    // data type into the dictionary types map.
    else if (!dictionaries.has(id = dictMeta['id'])) {
        // a dictionary index defaults to signed 32 bit int if unspecified
        keys = (keys = dictMeta['indexType']) ? extension_indexTypeFromJSON(keys) : new extension_Int32();
        dictionaries.set(id, type = extension_typeFromJSON(_field, extension_fieldChildrenFromJSON(_field, dictionaries)));
        dictType = new extension_type_Dictionary(type, keys, id, dictMeta['isOrdered']);
        field = new extension_Field(_field['name'], dictType, _field['nullable'], extension_customMetadataFromJSON(_field['customMetadata']));
    }
    // If dictionary encoded, and have already seen this dictionary Id in the schema, then reuse the
    // data type and wrap in a new Dictionary type and field.
    else {
        // a dictionary index defaults to signed 32 bit int if unspecified
        keys = (keys = dictMeta['indexType']) ? extension_indexTypeFromJSON(keys) : new extension_Int32();
        dictType = new extension_type_Dictionary(dictionaries.get(id), keys, id, dictMeta['isOrdered']);
        field = new extension_Field(_field['name'], dictType, _field['nullable'], extension_customMetadataFromJSON(_field['customMetadata']));
    }
    return field || null;
}
/** @ignore */
function extension_customMetadataFromJSON(_metadata) {
    return new Map(Object.entries(_metadata || {}));
}
/** @ignore */
function extension_indexTypeFromJSON(_type) {
    return new extension_Int_(_type['isSigned'], _type['bitWidth']);
}
/** @ignore */
function extension_typeFromJSON(f, children) {
    const typeId = f['type']['name'];
    switch (typeId) {
        case 'NONE': return new extension_Null();
        case 'null': return new extension_Null();
        case 'binary': return new extension_Binary();
        case 'utf8': return new extension_Utf8();
        case 'bool': return new extension_Bool();
        case 'list': return new extension_List((children || [])[0]);
        case 'struct': return new extension_Struct(children || []);
        case 'struct_': return new extension_Struct(children || []);
    }
    switch (typeId) {
        case 'int': {
            const t = f['type'];
            return new extension_Int_(t['isSigned'], t['bitWidth']);
        }
        case 'floatingpoint': {
            const t = f['type'];
            return new extension_Float(extension_Precision[t['precision']]);
        }
        case 'decimal': {
            const t = f['type'];
            return new extension_Decimal(t['scale'], t['precision']);
        }
        case 'date': {
            const t = f['type'];
            return new extension_Date_(extension_DateUnit[t['unit']]);
        }
        case 'time': {
            const t = f['type'];
            return new extension_Time_(extension_TimeUnit[t['unit']], t['bitWidth']);
        }
        case 'timestamp': {
            const t = f['type'];
            return new extension_Timestamp_(extension_TimeUnit[t['unit']], t['timezone']);
        }
        case 'interval': {
            const t = f['type'];
            return new extension_Interval_(extension_IntervalUnit[t['unit']]);
        }
        case 'union': {
            const t = f['type'];
            return new extension_Union_(extension_UnionMode[t['mode']], (t['typeIds'] || []), children || []);
        }
        case 'fixedsizebinary': {
            const t = f['type'];
            return new extension_FixedSizeBinary(t['byteWidth']);
        }
        case 'fixedsizelist': {
            const t = f['type'];
            return new extension_FixedSizeList(t['listSize'], (children || [])[0]);
        }
        case 'map': {
            const t = f['type'];
            return new extension_Map_((children || [])[0], t['keysSorted']);
        }
    }
    throw new Error(`Unrecognized type: "${typeId}"`);
}

//# sourceMappingURL=json.mjs.map

;// ../../node_modules/apache-arrow/ipc/metadata/message.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.








var extension_message_Long = extension_flatbuffers.Long;
var extension_message_Builder = extension_flatbuffers.Builder;
var extension_message_ByteBuffer = extension_flatbuffers.ByteBuffer;
var extension_message_Type = extension_Schema_org.apache.arrow.flatbuf.Type;
var src_extension_Field = extension_Schema_org.apache.arrow.flatbuf.Field;
var src_extension_Schema = extension_Schema_org.apache.arrow.flatbuf.Schema;
var extension_message_Buffer = extension_Schema_org.apache.arrow.flatbuf.Buffer;
var extension_Message = extension_org.apache.arrow.flatbuf.Message;
var extension_KeyValue = extension_Schema_org.apache.arrow.flatbuf.KeyValue;
var extension_FieldNode = extension_org.apache.arrow.flatbuf.FieldNode;
var extension_Endianness = extension_Schema_org.apache.arrow.flatbuf.Endianness;
var extension_RecordBatch = extension_org.apache.arrow.flatbuf.RecordBatch;
var extension_DictionaryBatch = extension_org.apache.arrow.flatbuf.DictionaryBatch;

/**
 * @ignore
 * @private
 **/
class src_extension_Message {
    constructor(bodyLength, version, headerType, header) {
        this._version = version;
        this._headerType = headerType;
        this.body = new Uint8Array(0);
        header && (this._createHeader = () => header);
        this._bodyLength = typeof bodyLength === 'number' ? bodyLength : bodyLength.low;
    }
    /** @nocollapse */
    static fromJSON(msg, headerType) {
        const message = new src_extension_Message(0, extension_MetadataVersion.V4, headerType);
        message._createHeader = extension_messageHeaderFromJSON(msg, headerType);
        return message;
    }
    /** @nocollapse */
    static decode(buf) {
        buf = new extension_message_ByteBuffer(extension_toUint8Array(buf));
        const _message = extension_Message.getRootAsMessage(buf);
        const bodyLength = _message.bodyLength();
        const version = _message.version();
        const headerType = _message.headerType();
        const message = new src_extension_Message(bodyLength, version, headerType);
        message._createHeader = extension_decodeMessageHeader(_message, headerType);
        return message;
    }
    /** @nocollapse */
    static encode(message) {
        let b = new extension_message_Builder(), headerOffset = -1;
        if (message.isSchema()) {
            headerOffset = extension_Schema.encode(b, message.header());
        }
        else if (message.isRecordBatch()) {
            headerOffset = src_extension_RecordBatch.encode(b, message.header());
        }
        else if (message.isDictionaryBatch()) {
            headerOffset = src_extension_DictionaryBatch.encode(b, message.header());
        }
        extension_Message.startMessage(b);
        extension_Message.addVersion(b, extension_MetadataVersion.V4);
        extension_Message.addHeader(b, headerOffset);
        extension_Message.addHeaderType(b, message.headerType);
        extension_Message.addBodyLength(b, new extension_message_Long(message.bodyLength, 0));
        extension_Message.finishMessageBuffer(b, extension_Message.endMessage(b));
        return b.asUint8Array();
    }
    /** @nocollapse */
    static from(header, bodyLength = 0) {
        if (header instanceof extension_Schema) {
            return new src_extension_Message(0, extension_MetadataVersion.V4, extension_MessageHeader.Schema, header);
        }
        if (header instanceof src_extension_RecordBatch) {
            return new src_extension_Message(bodyLength, extension_MetadataVersion.V4, extension_MessageHeader.RecordBatch, header);
        }
        if (header instanceof src_extension_DictionaryBatch) {
            return new src_extension_Message(bodyLength, extension_MetadataVersion.V4, extension_MessageHeader.DictionaryBatch, header);
        }
        throw new Error(`Unrecognized Message header: ${header}`);
    }
    get type() { return this.headerType; }
    get version() { return this._version; }
    get headerType() { return this._headerType; }
    get bodyLength() { return this._bodyLength; }
    header() { return this._createHeader(); }
    isSchema() { return this.headerType === extension_MessageHeader.Schema; }
    isRecordBatch() { return this.headerType === extension_MessageHeader.RecordBatch; }
    isDictionaryBatch() { return this.headerType === extension_MessageHeader.DictionaryBatch; }
}
/**
 * @ignore
 * @private
 **/
class src_extension_RecordBatch {
    constructor(length, nodes, buffers) {
        this._nodes = nodes;
        this._buffers = buffers;
        this._length = typeof length === 'number' ? length : length.low;
    }
    get nodes() { return this._nodes; }
    get length() { return this._length; }
    get buffers() { return this._buffers; }
}
/**
 * @ignore
 * @private
 **/
class src_extension_DictionaryBatch {
    constructor(data, id, isDelta = false) {
        this._data = data;
        this._isDelta = isDelta;
        this._id = typeof id === 'number' ? id : id.low;
    }
    get id() { return this._id; }
    get data() { return this._data; }
    get isDelta() { return this._isDelta; }
    get length() { return this.data.length; }
    get nodes() { return this.data.nodes; }
    get buffers() { return this.data.buffers; }
}
/**
 * @ignore
 * @private
 **/
class extension_BufferRegion {
    constructor(offset, length) {
        this.offset = typeof offset === 'number' ? offset : offset.low;
        this.length = typeof length === 'number' ? length : length.low;
    }
}
/**
 * @ignore
 * @private
 **/
class src_extension_FieldNode {
    constructor(length, nullCount) {
        this.length = typeof length === 'number' ? length : length.low;
        this.nullCount = typeof nullCount === 'number' ? nullCount : nullCount.low;
    }
}
/** @ignore */
function extension_messageHeaderFromJSON(message, type) {
    return (() => {
        switch (type) {
            case extension_MessageHeader.Schema: return extension_Schema.fromJSON(message);
            case extension_MessageHeader.RecordBatch: return src_extension_RecordBatch.fromJSON(message);
            case extension_MessageHeader.DictionaryBatch: return src_extension_DictionaryBatch.fromJSON(message);
        }
        throw new Error(`Unrecognized Message type: { name: ${extension_MessageHeader[type]}, type: ${type} }`);
    });
}
/** @ignore */
function extension_decodeMessageHeader(message, type) {
    return (() => {
        switch (type) {
            case extension_MessageHeader.Schema: return extension_Schema.decode(message.header(new src_extension_Schema()));
            case extension_MessageHeader.RecordBatch: return src_extension_RecordBatch.decode(message.header(new extension_RecordBatch()), message.version());
            case extension_MessageHeader.DictionaryBatch: return src_extension_DictionaryBatch.decode(message.header(new extension_DictionaryBatch()), message.version());
        }
        throw new Error(`Unrecognized Message type: { name: ${extension_MessageHeader[type]}, type: ${type} }`);
    });
}
extension_Field['encode'] = extension_encodeField;
extension_Field['decode'] = extension_decodeField;
extension_Field['fromJSON'] = extension_fieldFromJSON;
extension_Schema['encode'] = extension_encodeSchema;
extension_Schema['decode'] = extension_decodeSchema;
extension_Schema['fromJSON'] = extension_schemaFromJSON;
src_extension_RecordBatch['encode'] = extension_encodeRecordBatch;
src_extension_RecordBatch['decode'] = extension_decodeRecordBatch;
src_extension_RecordBatch['fromJSON'] = extension_recordBatchFromJSON;
src_extension_DictionaryBatch['encode'] = extension_encodeDictionaryBatch;
src_extension_DictionaryBatch['decode'] = extension_decodeDictionaryBatch;
src_extension_DictionaryBatch['fromJSON'] = extension_dictionaryBatchFromJSON;
src_extension_FieldNode['encode'] = extension_encodeFieldNode;
src_extension_FieldNode['decode'] = extension_decodeFieldNode;
extension_BufferRegion['encode'] = extension_encodeBufferRegion;
extension_BufferRegion['decode'] = extension_decodeBufferRegion;
/** @ignore */
function extension_decodeSchema(_schema, dictionaries = new Map()) {
    const fields = extension_decodeSchemaFields(_schema, dictionaries);
    return new extension_Schema(fields, extension_decodeCustomMetadata(_schema), dictionaries);
}
/** @ignore */
function extension_decodeRecordBatch(batch, version = extension_MetadataVersion.V4) {
    return new src_extension_RecordBatch(batch.length(), extension_decodeFieldNodes(batch), extension_decodeBuffers(batch, version));
}
/** @ignore */
function extension_decodeDictionaryBatch(batch, version = extension_MetadataVersion.V4) {
    return new src_extension_DictionaryBatch(src_extension_RecordBatch.decode(batch.data(), version), batch.id(), batch.isDelta());
}
/** @ignore */
function extension_decodeBufferRegion(b) {
    return new extension_BufferRegion(b.offset(), b.length());
}
/** @ignore */
function extension_decodeFieldNode(f) {
    return new src_extension_FieldNode(f.length(), f.nullCount());
}
/** @ignore */
function extension_decodeFieldNodes(batch) {
    const nodes = [];
    for (let f, i = -1, j = -1, n = batch.nodesLength(); ++i < n;) {
        if (f = batch.nodes(i)) {
            nodes[++j] = src_extension_FieldNode.decode(f);
        }
    }
    return nodes;
}
/** @ignore */
function extension_decodeBuffers(batch, version) {
    const bufferRegions = [];
    for (let b, i = -1, j = -1, n = batch.buffersLength(); ++i < n;) {
        if (b = batch.buffers(i)) {
            // If this Arrow buffer was written before version 4,
            // advance the buffer's bb_pos 8 bytes to skip past
            // the now-removed page_id field
            if (version < extension_MetadataVersion.V4) {
                b.bb_pos += (8 * (i + 1));
            }
            bufferRegions[++j] = extension_BufferRegion.decode(b);
        }
    }
    return bufferRegions;
}
/** @ignore */
function extension_decodeSchemaFields(schema, dictionaries) {
    const fields = [];
    for (let f, i = -1, j = -1, n = schema.fieldsLength(); ++i < n;) {
        if (f = schema.fields(i)) {
            fields[++j] = extension_Field.decode(f, dictionaries);
        }
    }
    return fields;
}
/** @ignore */
function extension_decodeFieldChildren(field, dictionaries) {
    const children = [];
    for (let f, i = -1, j = -1, n = field.childrenLength(); ++i < n;) {
        if (f = field.children(i)) {
            children[++j] = extension_Field.decode(f, dictionaries);
        }
    }
    return children;
}
/** @ignore */
function extension_decodeField(f, dictionaries) {
    let id;
    let field;
    let type;
    let keys;
    let dictType;
    let dictMeta;
    // If no dictionary encoding
    if (!dictionaries || !(dictMeta = f.dictionary())) {
        type = extension_decodeFieldType(f, extension_decodeFieldChildren(f, dictionaries));
        field = new extension_Field(f.name(), type, f.nullable(), extension_decodeCustomMetadata(f));
    }
    // tslint:disable
    // If dictionary encoded and the first time we've seen this dictionary id, decode
    // the data type and child fields, then wrap in a Dictionary type and insert the
    // data type into the dictionary types map.
    else if (!dictionaries.has(id = dictMeta.id().low)) {
        // a dictionary index defaults to signed 32 bit int if unspecified
        keys = (keys = dictMeta.indexType()) ? extension_decodeIndexType(keys) : new extension_Int32();
        dictionaries.set(id, type = extension_decodeFieldType(f, extension_decodeFieldChildren(f, dictionaries)));
        dictType = new extension_type_Dictionary(type, keys, id, dictMeta.isOrdered());
        field = new extension_Field(f.name(), dictType, f.nullable(), extension_decodeCustomMetadata(f));
    }
    // If dictionary encoded, and have already seen this dictionary Id in the schema, then reuse the
    // data type and wrap in a new Dictionary type and field.
    else {
        // a dictionary index defaults to signed 32 bit int if unspecified
        keys = (keys = dictMeta.indexType()) ? extension_decodeIndexType(keys) : new extension_Int32();
        dictType = new extension_type_Dictionary(dictionaries.get(id), keys, id, dictMeta.isOrdered());
        field = new extension_Field(f.name(), dictType, f.nullable(), extension_decodeCustomMetadata(f));
    }
    return field || null;
}
/** @ignore */
function extension_decodeCustomMetadata(parent) {
    const data = new Map();
    if (parent) {
        for (let entry, key, i = -1, n = parent.customMetadataLength() | 0; ++i < n;) {
            if ((entry = parent.customMetadata(i)) && (key = entry.key()) != null) {
                data.set(key, entry.value());
            }
        }
    }
    return data;
}
/** @ignore */
function extension_decodeIndexType(_type) {
    return new extension_Int_(_type.isSigned(), _type.bitWidth());
}
/** @ignore */
function extension_decodeFieldType(f, children) {
    const typeId = f.typeType();
    switch (typeId) {
        case extension_message_Type.NONE: return new extension_Null();
        case extension_message_Type.Null: return new extension_Null();
        case extension_message_Type.Binary: return new extension_Binary();
        case extension_message_Type.Utf8: return new extension_Utf8();
        case extension_message_Type.Bool: return new extension_Bool();
        case extension_message_Type.List: return new extension_List((children || [])[0]);
        case extension_message_Type.Struct_: return new extension_Struct(children || []);
    }
    switch (typeId) {
        case extension_message_Type.Int: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.Int());
            return new extension_Int_(t.isSigned(), t.bitWidth());
        }
        case extension_message_Type.FloatingPoint: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.FloatingPoint());
            return new extension_Float(t.precision());
        }
        case extension_message_Type.Decimal: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.Decimal());
            return new extension_Decimal(t.scale(), t.precision());
        }
        case extension_message_Type.Date: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.Date());
            return new extension_Date_(t.unit());
        }
        case extension_message_Type.Time: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.Time());
            return new extension_Time_(t.unit(), t.bitWidth());
        }
        case extension_message_Type.Timestamp: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.Timestamp());
            return new extension_Timestamp_(t.unit(), t.timezone());
        }
        case extension_message_Type.Interval: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.Interval());
            return new extension_Interval_(t.unit());
        }
        case extension_message_Type.Union: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.Union());
            return new extension_Union_(t.mode(), t.typeIdsArray() || [], children || []);
        }
        case extension_message_Type.FixedSizeBinary: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.FixedSizeBinary());
            return new extension_FixedSizeBinary(t.byteWidth());
        }
        case extension_message_Type.FixedSizeList: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.FixedSizeList());
            return new extension_FixedSizeList(t.listSize(), (children || [])[0]);
        }
        case extension_message_Type.Map: {
            const t = f.type(new extension_Schema_org.apache.arrow.flatbuf.Map());
            return new extension_Map_((children || [])[0], t.keysSorted());
        }
    }
    throw new Error(`Unrecognized type: "${extension_message_Type[typeId]}" (${typeId})`);
}
/** @ignore */
function extension_encodeSchema(b, schema) {
    const fieldOffsets = schema.fields.map((f) => extension_Field.encode(b, f));
    src_extension_Schema.startFieldsVector(b, fieldOffsets.length);
    const fieldsVectorOffset = src_extension_Schema.createFieldsVector(b, fieldOffsets);
    const metadataOffset = !(schema.metadata && schema.metadata.size > 0) ? -1 :
        src_extension_Schema.createCustomMetadataVector(b, [...schema.metadata].map(([k, v]) => {
            const key = b.createString(`${k}`);
            const val = b.createString(`${v}`);
            extension_KeyValue.startKeyValue(b);
            extension_KeyValue.addKey(b, key);
            extension_KeyValue.addValue(b, val);
            return extension_KeyValue.endKeyValue(b);
        }));
    src_extension_Schema.startSchema(b);
    src_extension_Schema.addFields(b, fieldsVectorOffset);
    src_extension_Schema.addEndianness(b, extension_platformIsLittleEndian ? extension_Endianness.Little : extension_Endianness.Big);
    if (metadataOffset !== -1) {
        src_extension_Schema.addCustomMetadata(b, metadataOffset);
    }
    return src_extension_Schema.endSchema(b);
}
/** @ignore */
function extension_encodeField(b, field) {
    let nameOffset = -1;
    let typeOffset = -1;
    let dictionaryOffset = -1;
    let type = field.type;
    let typeId = field.typeId;
    if (!extension_DataType.isDictionary(type)) {
        typeOffset = extension_typeassembler_instance.visit(type, b);
    }
    else {
        typeId = type.dictionary.typeId;
        dictionaryOffset = extension_typeassembler_instance.visit(type, b);
        typeOffset = extension_typeassembler_instance.visit(type.dictionary, b);
    }
    const childOffsets = (type.children || []).map((f) => extension_Field.encode(b, f));
    const childrenVectorOffset = src_extension_Field.createChildrenVector(b, childOffsets);
    const metadataOffset = !(field.metadata && field.metadata.size > 0) ? -1 :
        src_extension_Field.createCustomMetadataVector(b, [...field.metadata].map(([k, v]) => {
            const key = b.createString(`${k}`);
            const val = b.createString(`${v}`);
            extension_KeyValue.startKeyValue(b);
            extension_KeyValue.addKey(b, key);
            extension_KeyValue.addValue(b, val);
            return extension_KeyValue.endKeyValue(b);
        }));
    if (field.name) {
        nameOffset = b.createString(field.name);
    }
    src_extension_Field.startField(b);
    src_extension_Field.addType(b, typeOffset);
    src_extension_Field.addTypeType(b, typeId);
    src_extension_Field.addChildren(b, childrenVectorOffset);
    src_extension_Field.addNullable(b, !!field.nullable);
    if (nameOffset !== -1) {
        src_extension_Field.addName(b, nameOffset);
    }
    if (dictionaryOffset !== -1) {
        src_extension_Field.addDictionary(b, dictionaryOffset);
    }
    if (metadataOffset !== -1) {
        src_extension_Field.addCustomMetadata(b, metadataOffset);
    }
    return src_extension_Field.endField(b);
}
/** @ignore */
function extension_encodeRecordBatch(b, recordBatch) {
    const nodes = recordBatch.nodes || [];
    const buffers = recordBatch.buffers || [];
    extension_RecordBatch.startNodesVector(b, nodes.length);
    nodes.slice().reverse().forEach((n) => src_extension_FieldNode.encode(b, n));
    const nodesVectorOffset = b.endVector();
    extension_RecordBatch.startBuffersVector(b, buffers.length);
    buffers.slice().reverse().forEach((b_) => extension_BufferRegion.encode(b, b_));
    const buffersVectorOffset = b.endVector();
    extension_RecordBatch.startRecordBatch(b);
    extension_RecordBatch.addLength(b, new extension_message_Long(recordBatch.length, 0));
    extension_RecordBatch.addNodes(b, nodesVectorOffset);
    extension_RecordBatch.addBuffers(b, buffersVectorOffset);
    return extension_RecordBatch.endRecordBatch(b);
}
/** @ignore */
function extension_encodeDictionaryBatch(b, dictionaryBatch) {
    const dataOffset = src_extension_RecordBatch.encode(b, dictionaryBatch.data);
    extension_DictionaryBatch.startDictionaryBatch(b);
    extension_DictionaryBatch.addId(b, new extension_message_Long(dictionaryBatch.id, 0));
    extension_DictionaryBatch.addIsDelta(b, dictionaryBatch.isDelta);
    extension_DictionaryBatch.addData(b, dataOffset);
    return extension_DictionaryBatch.endDictionaryBatch(b);
}
/** @ignore */
function extension_encodeFieldNode(b, node) {
    return extension_FieldNode.createFieldNode(b, new extension_message_Long(node.length, 0), new extension_message_Long(node.nullCount, 0));
}
/** @ignore */
function extension_encodeBufferRegion(b, node) {
    return extension_message_Buffer.createBuffer(b, new extension_message_Long(node.offset, 0), new extension_message_Long(node.length, 0));
}
/** @ignore */
const extension_platformIsLittleEndian = (function () {
    const buffer = new ArrayBuffer(2);
    new DataView(buffer).setInt16(0, 256, true /* littleEndian */);
    // Int16Array uses the platform's endianness.
    return new Int16Array(buffer)[0] === 256;
})();

//# sourceMappingURL=message.mjs.map

;// ../../node_modules/apache-arrow/ipc/message.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


var extension_ipc_message_ByteBuffer = extension_flatbuffers.ByteBuffer;






/** @ignore */ const extension_invalidMessageType = (type) => `Expected ${extension_MessageHeader[type]} Message in stream, but was null or length 0.`;
/** @ignore */ const extension_nullMessage = (type) => `Header pointer of flatbuffer-encoded ${extension_MessageHeader[type]} Message is null or length 0.`;
/** @ignore */ const extension_invalidMessageMetadata = (expected, actual) => `Expected to read ${expected} metadata bytes, but only read ${actual}.`;
/** @ignore */ const extension_invalidMessageBodyLength = (expected, actual) => `Expected to read ${expected} bytes for message body, but only read ${actual}.`;
/** @ignore */
class extension_MessageReader {
    constructor(source) {
        this.source = source instanceof extension_ByteStream ? source : new extension_ByteStream(source);
    }
    [Symbol.iterator]() { return this; }
    next() {
        let r;
        if ((r = this.readMetadataLength()).done) {
            return extension_ITERATOR_DONE;
        }
        // ARROW-6313: If the first 4 bytes are continuation indicator (-1), read
        // the next 4 for the 32-bit metadata length. Otherwise, assume this is a
        // pre-v0.15 message, where the first 4 bytes are the metadata length.
        if ((r.value === -1) &&
            (r = this.readMetadataLength()).done) {
            return extension_ITERATOR_DONE;
        }
        if ((r = this.readMetadata(r.value)).done) {
            return extension_ITERATOR_DONE;
        }
        return r;
    }
    throw(value) { return this.source.throw(value); }
    return(value) { return this.source.return(value); }
    readMessage(type) {
        let r;
        if ((r = this.next()).done) {
            return null;
        }
        if ((type != null) && r.value.headerType !== type) {
            throw new Error(extension_invalidMessageType(type));
        }
        return r.value;
    }
    readMessageBody(bodyLength) {
        if (bodyLength <= 0) {
            return new Uint8Array(0);
        }
        const buf = extension_toUint8Array(this.source.read(bodyLength));
        if (buf.byteLength < bodyLength) {
            throw new Error(extension_invalidMessageBodyLength(bodyLength, buf.byteLength));
        }
        // 1. Work around bugs in fs.ReadStream's internal Buffer pooling, see: https://github.com/nodejs/node/issues/24817
        // 2. Work around https://github.com/whatwg/streams/blob/0ebe4b042e467d9876d80ae045de3843092ad797/reference-implementation/lib/helpers.js#L126
        return /* 1. */ (buf.byteOffset % 8 === 0) &&
            /* 2. */ (buf.byteOffset + buf.byteLength) <= buf.buffer.byteLength ? buf : buf.slice();
    }
    readSchema(throwIfNull = false) {
        const type = extension_MessageHeader.Schema;
        const message = this.readMessage(type);
        const schema = message && message.header();
        if (throwIfNull && !schema) {
            throw new Error(extension_nullMessage(type));
        }
        return schema;
    }
    readMetadataLength() {
        const buf = this.source.read(extension_PADDING);
        const bb = buf && new extension_ipc_message_ByteBuffer(buf);
        const len = bb && bb.readInt32(0) || 0;
        return { done: len === 0, value: len };
    }
    readMetadata(metadataLength) {
        const buf = this.source.read(metadataLength);
        if (!buf) {
            return extension_ITERATOR_DONE;
        }
        if (buf.byteLength < metadataLength) {
            throw new Error(extension_invalidMessageMetadata(metadataLength, buf.byteLength));
        }
        return { done: false, value: src_extension_Message.decode(buf) };
    }
}
/** @ignore */
class extension_AsyncMessageReader {
    constructor(source, byteLength) {
        this.source = source instanceof extension_AsyncByteStream ? source
            : extension_isFileHandle(source)
                ? new extension_AsyncRandomAccessFile(source, byteLength)
                : new extension_AsyncByteStream(source);
    }
    [Symbol.asyncIterator]() { return this; }
    async next() {
        let r;
        if ((r = await this.readMetadataLength()).done) {
            return extension_ITERATOR_DONE;
        }
        // ARROW-6313: If the first 4 bytes are continuation indicator (-1), read
        // the next 4 for the 32-bit metadata length. Otherwise, assume this is a
        // pre-v0.15 message, where the first 4 bytes are the metadata length.
        if ((r.value === -1) &&
            (r = await this.readMetadataLength()).done) {
            return extension_ITERATOR_DONE;
        }
        if ((r = await this.readMetadata(r.value)).done) {
            return extension_ITERATOR_DONE;
        }
        return r;
    }
    async throw(value) { return await this.source.throw(value); }
    async return(value) { return await this.source.return(value); }
    async readMessage(type) {
        let r;
        if ((r = await this.next()).done) {
            return null;
        }
        if ((type != null) && r.value.headerType !== type) {
            throw new Error(extension_invalidMessageType(type));
        }
        return r.value;
    }
    async readMessageBody(bodyLength) {
        if (bodyLength <= 0) {
            return new Uint8Array(0);
        }
        const buf = extension_toUint8Array(await this.source.read(bodyLength));
        if (buf.byteLength < bodyLength) {
            throw new Error(extension_invalidMessageBodyLength(bodyLength, buf.byteLength));
        }
        // 1. Work around bugs in fs.ReadStream's internal Buffer pooling, see: https://github.com/nodejs/node/issues/24817
        // 2. Work around https://github.com/whatwg/streams/blob/0ebe4b042e467d9876d80ae045de3843092ad797/reference-implementation/lib/helpers.js#L126
        return /* 1. */ (buf.byteOffset % 8 === 0) &&
            /* 2. */ (buf.byteOffset + buf.byteLength) <= buf.buffer.byteLength ? buf : buf.slice();
    }
    async readSchema(throwIfNull = false) {
        const type = extension_MessageHeader.Schema;
        const message = await this.readMessage(type);
        const schema = message && message.header();
        if (throwIfNull && !schema) {
            throw new Error(extension_nullMessage(type));
        }
        return schema;
    }
    async readMetadataLength() {
        const buf = await this.source.read(extension_PADDING);
        const bb = buf && new extension_ipc_message_ByteBuffer(buf);
        const len = bb && bb.readInt32(0) || 0;
        return { done: len === 0, value: len };
    }
    async readMetadata(metadataLength) {
        const buf = await this.source.read(metadataLength);
        if (!buf) {
            return extension_ITERATOR_DONE;
        }
        if (buf.byteLength < metadataLength) {
            throw new Error(extension_invalidMessageMetadata(metadataLength, buf.byteLength));
        }
        return { done: false, value: src_extension_Message.decode(buf) };
    }
}
/** @ignore */
class extension_JSONMessageReader extends extension_MessageReader {
    constructor(source) {
        super(new Uint8Array(0));
        this._schema = false;
        this._body = [];
        this._batchIndex = 0;
        this._dictionaryIndex = 0;
        this._json = source instanceof extension_ArrowJSON ? source : new extension_ArrowJSON(source);
    }
    next() {
        const { _json } = this;
        if (!this._schema) {
            this._schema = true;
            const message = src_extension_Message.fromJSON(_json.schema, extension_MessageHeader.Schema);
            return { done: false, value: message };
        }
        if (this._dictionaryIndex < _json.dictionaries.length) {
            const batch = _json.dictionaries[this._dictionaryIndex++];
            this._body = batch['data']['columns'];
            const message = src_extension_Message.fromJSON(batch, extension_MessageHeader.DictionaryBatch);
            return { done: false, value: message };
        }
        if (this._batchIndex < _json.batches.length) {
            const batch = _json.batches[this._batchIndex++];
            this._body = batch['columns'];
            const message = src_extension_Message.fromJSON(batch, extension_MessageHeader.RecordBatch);
            return { done: false, value: message };
        }
        this._body = [];
        return extension_ITERATOR_DONE;
    }
    readMessageBody(_bodyLength) {
        return flattenDataSources(this._body);
        function flattenDataSources(xs) {
            return (xs || []).reduce((buffers, column) => [
                ...buffers,
                ...(column['VALIDITY'] && [column['VALIDITY']] || []),
                ...(column['TYPE'] && [column['TYPE']] || []),
                ...(column['OFFSET'] && [column['OFFSET']] || []),
                ...(column['DATA'] && [column['DATA']] || []),
                ...flattenDataSources(column['children'])
            ], []);
        }
    }
    readMessage(type) {
        let r;
        if ((r = this.next()).done) {
            return null;
        }
        if ((type != null) && r.value.headerType !== type) {
            throw new Error(extension_invalidMessageType(type));
        }
        return r.value;
    }
    readSchema() {
        const type = extension_MessageHeader.Schema;
        const message = this.readMessage(type);
        const schema = message && message.header();
        if (!message || !schema) {
            throw new Error(extension_nullMessage(type));
        }
        return schema;
    }
}
/** @ignore */
const extension_PADDING = 4;
/** @ignore */
const extension_MAGIC_STR = 'ARROW1';
/** @ignore */
const extension_MAGIC = new Uint8Array(extension_MAGIC_STR.length);
for (let i = 0; i < extension_MAGIC_STR.length; i += 1 | 0) {
    extension_MAGIC[i] = extension_MAGIC_STR.charCodeAt(i);
}
/** @ignore */
function extension_checkForMagicArrowString(buffer, index = 0) {
    for (let i = -1, n = extension_MAGIC.length; ++i < n;) {
        if (extension_MAGIC[i] !== buffer[index + i]) {
            return false;
        }
    }
    return true;
}
/** @ignore */
const extension_magicLength = extension_MAGIC.length;
/** @ignore */
const extension_magicAndPadding = extension_magicLength + extension_PADDING;
/** @ignore */
const extension_magicX2AndPadding = extension_magicLength * 2 + extension_PADDING;

//# sourceMappingURL=message.mjs.map

;// ../../node_modules/apache-arrow/visitor/vectorassembler.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.








/** @ignore */
class extension_VectorAssembler extends extension_Visitor {
    constructor() {
        super();
        this._byteLength = 0;
        this._nodes = [];
        this._buffers = [];
        this._bufferRegions = [];
    }
    /** @nocollapse */
    static assemble(...args) {
        const assembler = new extension_VectorAssembler();
        const vectorChildren = extension_selectVectorChildrenArgs(extension_recordbatch_RecordBatch, args);
        const [assembleResult = assembler] = assembler.visitMany(vectorChildren);
        return assembleResult;
    }
    visit(vector) {
        if (!extension_DataType.isDictionary(vector.type)) {
            const { data, length, nullCount } = vector;
            if (length > 2147483647) {
                /* istanbul ignore next */
                throw new RangeError('Cannot write arrays larger than 2^31 - 1 in length');
            }
            if (!extension_DataType.isNull(vector.type)) {
                extension_addBuffer.call(this, nullCount <= 0
                    ? new Uint8Array(0) // placeholder validity buffer
                    : extension_truncateBitmap(data.offset, length, data.nullBitmap));
            }
            this.nodes.push(new src_extension_FieldNode(length, nullCount));
        }
        return super.visit(vector);
    }
    visitNull(_nullV) {
        return this;
    }
    visitDictionary(vector) {
        // Assemble the indices here, Dictionary assembled separately.
        return this.visit(vector.indices);
    }
    get nodes() { return this._nodes; }
    get buffers() { return this._buffers; }
    get byteLength() { return this._byteLength; }
    get bufferRegions() { return this._bufferRegions; }
}
/** @ignore */
function extension_addBuffer(values) {
    const byteLength = (values.byteLength + 7) & ~7; // Round up to a multiple of 8
    this.buffers.push(values);
    this.bufferRegions.push(new extension_BufferRegion(this._byteLength, byteLength));
    this._byteLength += byteLength;
    return this;
}
/** @ignore */
function extension_assembleUnion(vector) {
    const { type, length, typeIds, valueOffsets } = vector;
    // All Union Vectors have a typeIds buffer
    extension_addBuffer.call(this, typeIds);
    // If this is a Sparse Union, treat it like all other Nested types
    if (type.mode === extension_UnionMode.Sparse) {
        return extension_assembleNestedVector.call(this, vector);
    }
    else if (type.mode === extension_UnionMode.Dense) {
        // If this is a Dense Union, add the valueOffsets buffer and potentially slice the children
        if (vector.offset <= 0) {
            // If the Vector hasn't been sliced, write the existing valueOffsets
            extension_addBuffer.call(this, valueOffsets);
            // We can treat this like all other Nested types
            return extension_assembleNestedVector.call(this, vector);
        }
        else {
            // A sliced Dense Union is an unpleasant case. Because the offsets are different for
            // each child vector, we need to "rebase" the valueOffsets for each child
            // Union typeIds are not necessary 0-indexed
            const maxChildTypeId = typeIds.reduce((x, y) => Math.max(x, y), typeIds[0]);
            const childLengths = new Int32Array(maxChildTypeId + 1);
            // Set all to -1 to indicate that we haven't observed a first occurrence of a particular child yet
            const childOffsets = new Int32Array(maxChildTypeId + 1).fill(-1);
            const shiftedOffsets = new Int32Array(length);
            // If we have a non-zero offset, then the value offsets do not start at
            // zero. We must a) create a new offsets array with shifted offsets and
            // b) slice the values array accordingly
            const unshiftedOffsets = extension_rebaseValueOffsets(-valueOffsets[0], length, valueOffsets);
            for (let typeId, shift, index = -1; ++index < length;) {
                if ((shift = childOffsets[typeId = typeIds[index]]) === -1) {
                    shift = childOffsets[typeId] = unshiftedOffsets[typeId];
                }
                shiftedOffsets[index] = unshiftedOffsets[index] - shift;
                ++childLengths[typeId];
            }
            extension_addBuffer.call(this, shiftedOffsets);
            // Slice and visit children accordingly
            for (let child, childIndex = -1, numChildren = type.children.length; ++childIndex < numChildren;) {
                if (child = vector.getChildAt(childIndex)) {
                    const typeId = type.typeIds[childIndex];
                    const childLength = Math.min(length, childLengths[typeId]);
                    this.visit(child.slice(childOffsets[typeId], childLength));
                }
            }
        }
    }
    return this;
}
/** @ignore */
function extension_assembleBoolVector(vector) {
    // Bool vector is a special case of FlatVector, as its data buffer needs to stay packed
    let values;
    if (vector.nullCount >= vector.length) {
        // If all values are null, just insert a placeholder empty data buffer (fastest path)
        return extension_addBuffer.call(this, new Uint8Array(0));
    }
    else if ((values = vector.values) instanceof Uint8Array) {
        // If values is already a Uint8Array, slice the bitmap (fast path)
        return extension_addBuffer.call(this, extension_truncateBitmap(vector.offset, vector.length, values));
    }
    // Otherwise if the underlying data *isn't* a Uint8Array, enumerate the
    // values as bools and re-pack them into a Uint8Array. This code isn't
    // reachable unless you're trying to manipulate the Data internals,
    // we we're only doing this for safety.
    /* istanbul ignore next */
    return extension_addBuffer.call(this, extension_packBools(vector));
}
/** @ignore */
function extension_assembleFlatVector(vector) {
    return extension_addBuffer.call(this, vector.values.subarray(0, vector.length * vector.stride));
}
/** @ignore */
function extension_assembleFlatListVector(vector) {
    const { length, values, valueOffsets } = vector;
    const firstOffset = valueOffsets[0];
    const lastOffset = valueOffsets[length];
    const byteLength = Math.min(lastOffset - firstOffset, values.byteLength - firstOffset);
    // Push in the order FlatList types read their buffers
    extension_addBuffer.call(this, extension_rebaseValueOffsets(-valueOffsets[0], length, valueOffsets)); // valueOffsets buffer first
    extension_addBuffer.call(this, values.subarray(firstOffset, firstOffset + byteLength)); // sliced values buffer second
    return this;
}
/** @ignore */
function extension_assembleListVector(vector) {
    const { length, valueOffsets } = vector;
    // If we have valueOffsets (MapVector, ListVector), push that buffer first
    if (valueOffsets) {
        extension_addBuffer.call(this, extension_rebaseValueOffsets(valueOffsets[0], length, valueOffsets));
    }
    // Then insert the List's values child
    return this.visit(vector.getChildAt(0));
}
/** @ignore */
function extension_assembleNestedVector(vector) {
    return this.visitMany(vector.type.children.map((_, i) => vector.getChildAt(i)).filter(Boolean))[0];
}
extension_VectorAssembler.prototype.visitBool = extension_assembleBoolVector;
extension_VectorAssembler.prototype.visitInt = extension_assembleFlatVector;
extension_VectorAssembler.prototype.visitFloat = extension_assembleFlatVector;
extension_VectorAssembler.prototype.visitUtf8 = extension_assembleFlatListVector;
extension_VectorAssembler.prototype.visitBinary = extension_assembleFlatListVector;
extension_VectorAssembler.prototype.visitFixedSizeBinary = extension_assembleFlatVector;
extension_VectorAssembler.prototype.visitDate = extension_assembleFlatVector;
extension_VectorAssembler.prototype.visitTimestamp = extension_assembleFlatVector;
extension_VectorAssembler.prototype.visitTime = extension_assembleFlatVector;
extension_VectorAssembler.prototype.visitDecimal = extension_assembleFlatVector;
extension_VectorAssembler.prototype.visitList = extension_assembleListVector;
extension_VectorAssembler.prototype.visitStruct = extension_assembleNestedVector;
extension_VectorAssembler.prototype.visitUnion = extension_assembleUnion;
extension_VectorAssembler.prototype.visitInterval = extension_assembleFlatVector;
extension_VectorAssembler.prototype.visitFixedSizeList = extension_assembleListVector;
extension_VectorAssembler.prototype.visitMap = extension_assembleListVector;

//# sourceMappingURL=vectorassembler.mjs.map

;// ../../node_modules/apache-arrow/visitor/jsontypeassembler.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore */
class extension_JSONTypeAssembler extends extension_Visitor {
    visit(node) {
        return node == null ? undefined : super.visit(node);
    }
    visitNull({ typeId }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase() };
    }
    visitInt({ typeId, bitWidth, isSigned }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase(), 'bitWidth': bitWidth, 'isSigned': isSigned };
    }
    visitFloat({ typeId, precision }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase(), 'precision': extension_Precision[precision] };
    }
    visitBinary({ typeId }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase() };
    }
    visitBool({ typeId }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase() };
    }
    visitUtf8({ typeId }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase() };
    }
    visitDecimal({ typeId, scale, precision }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase(), 'scale': scale, 'precision': precision };
    }
    visitDate({ typeId, unit }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase(), 'unit': extension_DateUnit[unit] };
    }
    visitTime({ typeId, unit, bitWidth }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase(), 'unit': extension_TimeUnit[unit], bitWidth };
    }
    visitTimestamp({ typeId, timezone, unit }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase(), 'unit': extension_TimeUnit[unit], timezone };
    }
    visitInterval({ typeId, unit }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase(), 'unit': extension_IntervalUnit[unit] };
    }
    visitList({ typeId }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase() };
    }
    visitStruct({ typeId }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase() };
    }
    visitUnion({ typeId, mode, typeIds }) {
        return {
            'name': extension_ArrowType[typeId].toLowerCase(),
            'mode': extension_UnionMode[mode],
            'typeIds': [...typeIds]
        };
    }
    visitDictionary(node) {
        return this.visit(node.dictionary);
    }
    visitFixedSizeBinary({ typeId, byteWidth }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase(), 'byteWidth': byteWidth };
    }
    visitFixedSizeList({ typeId, listSize }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase(), 'listSize': listSize };
    }
    visitMap({ typeId, keysSorted }) {
        return { 'name': extension_ArrowType[typeId].toLowerCase(), 'keysSorted': keysSorted };
    }
}

//# sourceMappingURL=jsontypeassembler.mjs.map

;// ../../node_modules/apache-arrow/visitor/jsonvectorassembler.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.










/** @ignore */
class extension_JSONVectorAssembler extends extension_Visitor {
    /** @nocollapse */
    static assemble(...args) {
        return new extension_JSONVectorAssembler().visitMany(extension_selectColumnChildrenArgs(extension_recordbatch_RecordBatch, args));
    }
    visit(column) {
        const { data, name, length } = column;
        const { offset, nullCount, nullBitmap } = data;
        const type = extension_DataType.isDictionary(column.type) ? column.type.indices : column.type;
        const buffers = Object.assign([], data.buffers, { [extension_BufferType.VALIDITY]: undefined });
        return {
            'name': name,
            'count': length,
            'VALIDITY': extension_DataType.isNull(type) ? undefined
                : nullCount <= 0 ? Array.from({ length }, () => 1)
                    : [...extension_iterateBits(nullBitmap, offset, length, null, extension_getBit)],
            ...super.visit(extension_AbstractVector.new(data.clone(type, offset, length, 0, buffers)))
        };
    }
    visitNull() { return {}; }
    visitBool({ values, offset, length }) {
        return { 'DATA': [...extension_iterateBits(values, offset, length, null, extension_getBool)] };
    }
    visitInt(vector) {
        return {
            'DATA': vector.type.bitWidth < 64
                ? [...vector.values]
                : [...extension_bigNumsToStrings(vector.values, 2)]
        };
    }
    visitFloat(vector) {
        return { 'DATA': [...vector.values] };
    }
    visitUtf8(vector) {
        return { 'DATA': [...vector], 'OFFSET': [...vector.valueOffsets] };
    }
    visitBinary(vector) {
        return { 'DATA': [...extension_binaryToString(vector)], OFFSET: [...vector.valueOffsets] };
    }
    visitFixedSizeBinary(vector) {
        return { 'DATA': [...extension_binaryToString(vector)] };
    }
    visitDate(vector) {
        return {
            'DATA': vector.type.unit === extension_DateUnit.DAY
                ? [...vector.values]
                : [...extension_bigNumsToStrings(vector.values, 2)]
        };
    }
    visitTimestamp(vector) {
        return { 'DATA': [...extension_bigNumsToStrings(vector.values, 2)] };
    }
    visitTime(vector) {
        return {
            'DATA': vector.type.unit < extension_TimeUnit.MICROSECOND
                ? [...vector.values]
                : [...extension_bigNumsToStrings(vector.values, 2)]
        };
    }
    visitDecimal(vector) {
        return { 'DATA': [...extension_bigNumsToStrings(vector.values, 4)] };
    }
    visitList(vector) {
        return {
            'OFFSET': [...vector.valueOffsets],
            'children': vector.type.children.map((f, i) => this.visit(new extension_column_Column(f, [vector.getChildAt(i)])))
        };
    }
    visitStruct(vector) {
        return {
            'children': vector.type.children.map((f, i) => this.visit(new extension_column_Column(f, [vector.getChildAt(i)])))
        };
    }
    visitUnion(vector) {
        return {
            'TYPE': [...vector.typeIds],
            'OFFSET': vector.type.mode === extension_UnionMode.Dense ? [...vector.valueOffsets] : undefined,
            'children': vector.type.children.map((f, i) => this.visit(new extension_column_Column(f, [vector.getChildAt(i)])))
        };
    }
    visitInterval(vector) {
        return { 'DATA': [...vector.values] };
    }
    visitFixedSizeList(vector) {
        return {
            'children': vector.type.children.map((f, i) => this.visit(new extension_column_Column(f, [vector.getChildAt(i)])))
        };
    }
    visitMap(vector) {
        return {
            'OFFSET': [...vector.valueOffsets],
            'children': vector.type.children.map((f, i) => this.visit(new extension_column_Column(f, [vector.getChildAt(i)])))
        };
    }
}
/** @ignore */
function* extension_binaryToString(vector) {
    for (const octets of vector) {
        yield octets.reduce((str, byte) => {
            return `${str}${('0' + (byte & 0xFF).toString(16)).slice(-2)}`;
        }, '').toUpperCase();
    }
}
/** @ignore */
function* extension_bigNumsToStrings(values, stride) {
    for (let i = -1, n = values.length / stride; ++i < n;) {
        yield `${extension_BN.new(values.subarray((i + 0) * stride, (i + 1) * stride), false)}`;
    }
}

//# sourceMappingURL=jsonvectorassembler.mjs.map

;// ../../node_modules/apache-arrow/ipc/writer.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

















class extension_RecordBatchWriter extends extension_ReadableInterop {
    constructor(options) {
        super();
        this._position = 0;
        this._started = false;
        // @ts-ignore
        this._sink = new extension_AsyncByteQueue();
        this._schema = null;
        this._dictionaryBlocks = [];
        this._recordBatchBlocks = [];
        this._dictionaryDeltaOffsets = new Map();
        extension_compat_isObject(options) || (options = { autoDestroy: true, writeLegacyIpcFormat: false });
        this._autoDestroy = (typeof options.autoDestroy === 'boolean') ? options.autoDestroy : true;
        this._writeLegacyIpcFormat = (typeof options.writeLegacyIpcFormat === 'boolean') ? options.writeLegacyIpcFormat : false;
    }
    /** @nocollapse */
    // @ts-ignore
    static throughNode(options) {
        throw new Error(`"throughNode" not available in this environment`);
    }
    /** @nocollapse */
    static throughDOM(
    // @ts-ignore
    writableStrategy, 
    // @ts-ignore
    readableStrategy) {
        throw new Error(`"throughDOM" not available in this environment`);
    }
    toString(sync = false) {
        return this._sink.toString(sync);
    }
    toUint8Array(sync = false) {
        return this._sink.toUint8Array(sync);
    }
    writeAll(input) {
        if (extension_isPromise(input)) {
            return input.then((x) => this.writeAll(x));
        }
        else if (extension_isAsyncIterable(input)) {
            return extension_writeAllAsync(this, input);
        }
        return extension_writeAll(this, input);
    }
    get closed() { return this._sink.closed; }
    [Symbol.asyncIterator]() { return this._sink[Symbol.asyncIterator](); }
    toDOMStream(options) { return this._sink.toDOMStream(options); }
    toNodeStream(options) { return this._sink.toNodeStream(options); }
    close() {
        return this.reset()._sink.close();
    }
    abort(reason) {
        return this.reset()._sink.abort(reason);
    }
    finish() {
        this._autoDestroy ? this.close() : this.reset(this._sink, this._schema);
        return this;
    }
    reset(sink = this._sink, schema = null) {
        if ((sink === this._sink) || (sink instanceof extension_AsyncByteQueue)) {
            this._sink = sink;
        }
        else {
            this._sink = new extension_AsyncByteQueue();
            if (sink && extension_isWritableDOMStream(sink)) {
                this.toDOMStream({ type: 'bytes' }).pipeTo(sink);
            }
            else if (sink && extension_isWritableNodeStream(sink)) {
                this.toNodeStream({ objectMode: false }).pipe(sink);
            }
        }
        if (this._started && this._schema) {
            this._writeFooter(this._schema);
        }
        this._started = false;
        this._dictionaryBlocks = [];
        this._recordBatchBlocks = [];
        this._dictionaryDeltaOffsets = new Map();
        if (!schema || !(schema.compareTo(this._schema))) {
            if (schema === null) {
                this._position = 0;
                this._schema = null;
            }
            else {
                this._started = true;
                this._schema = schema;
                this._writeSchema(schema);
            }
        }
        return this;
    }
    write(payload) {
        let schema = null;
        if (!this._sink) {
            throw new Error(`RecordBatchWriter is closed`);
        }
        else if (payload === null || payload === undefined) {
            return this.finish() && undefined;
        }
        else if (payload instanceof extension_table_Table && !(schema = payload.schema)) {
            return this.finish() && undefined;
        }
        else if (payload instanceof extension_recordbatch_RecordBatch && !(schema = payload.schema)) {
            return this.finish() && undefined;
        }
        if (schema && !schema.compareTo(this._schema)) {
            if (this._started && this._autoDestroy) {
                return this.close();
            }
            this.reset(this._sink, schema);
        }
        if (payload instanceof extension_recordbatch_RecordBatch) {
            if (!(payload instanceof extension_InternalEmptyPlaceholderRecordBatch)) {
                this._writeRecordBatch(payload);
            }
        }
        else if (payload instanceof extension_table_Table) {
            this.writeAll(payload.chunks);
        }
        else if (extension_isIterable(payload)) {
            this.writeAll(payload);
        }
    }
    _writeMessage(message, alignment = 8) {
        const a = alignment - 1;
        const buffer = src_extension_Message.encode(message);
        const flatbufferSize = buffer.byteLength;
        const prefixSize = !this._writeLegacyIpcFormat ? 8 : 4;
        const alignedSize = (flatbufferSize + prefixSize + a) & ~a;
        const nPaddingBytes = alignedSize - flatbufferSize - prefixSize;
        if (message.headerType === extension_MessageHeader.RecordBatch) {
            this._recordBatchBlocks.push(new extension_FileBlock(alignedSize, message.bodyLength, this._position));
        }
        else if (message.headerType === extension_MessageHeader.DictionaryBatch) {
            this._dictionaryBlocks.push(new extension_FileBlock(alignedSize, message.bodyLength, this._position));
        }
        // If not in legacy pre-0.15.0 mode, write the stream continuation indicator
        if (!this._writeLegacyIpcFormat) {
            this._write(Int32Array.of(-1));
        }
        // Write the flatbuffer size prefix including padding
        this._write(Int32Array.of(alignedSize - prefixSize));
        // Write the flatbuffer
        if (flatbufferSize > 0) {
            this._write(buffer);
        }
        // Write any padding
        return this._writePadding(nPaddingBytes);
    }
    _write(chunk) {
        if (this._started) {
            const buffer = extension_toUint8Array(chunk);
            if (buffer && buffer.byteLength > 0) {
                this._sink.write(buffer);
                this._position += buffer.byteLength;
            }
        }
        return this;
    }
    _writeSchema(schema) {
        return this._writeMessage(src_extension_Message.from(schema));
    }
    // @ts-ignore
    _writeFooter(schema) {
        // eos bytes
        return this._writeLegacyIpcFormat
            ? this._write(Int32Array.of(0))
            : this._write(Int32Array.of(-1, 0));
    }
    _writeMagic() {
        return this._write(extension_MAGIC);
    }
    _writePadding(nBytes) {
        return nBytes > 0 ? this._write(new Uint8Array(nBytes)) : this;
    }
    _writeRecordBatch(batch) {
        const { byteLength, nodes, bufferRegions, buffers } = extension_VectorAssembler.assemble(batch);
        const recordBatch = new src_extension_RecordBatch(batch.length, nodes, bufferRegions);
        const message = src_extension_Message.from(recordBatch, byteLength);
        return this
            ._writeDictionaries(batch)
            ._writeMessage(message)
            ._writeBodyBuffers(buffers);
    }
    _writeDictionaryBatch(dictionary, id, isDelta = false) {
        this._dictionaryDeltaOffsets.set(id, dictionary.length + (this._dictionaryDeltaOffsets.get(id) || 0));
        const { byteLength, nodes, bufferRegions, buffers } = extension_VectorAssembler.assemble(dictionary);
        const recordBatch = new src_extension_RecordBatch(dictionary.length, nodes, bufferRegions);
        const dictionaryBatch = new src_extension_DictionaryBatch(recordBatch, id, isDelta);
        const message = src_extension_Message.from(dictionaryBatch, byteLength);
        return this
            ._writeMessage(message)
            ._writeBodyBuffers(buffers);
    }
    _writeBodyBuffers(buffers) {
        let buffer;
        let size, padding;
        for (let i = -1, n = buffers.length; ++i < n;) {
            if ((buffer = buffers[i]) && (size = buffer.byteLength) > 0) {
                this._write(buffer);
                if ((padding = ((size + 7) & ~7) - size) > 0) {
                    this._writePadding(padding);
                }
            }
        }
        return this;
    }
    _writeDictionaries(batch) {
        for (let [id, dictionary] of batch.dictionaries) {
            let offset = this._dictionaryDeltaOffsets.get(id) || 0;
            if (offset === 0 || (dictionary = dictionary.slice(offset)).length > 0) {
                const chunks = 'chunks' in dictionary ? dictionary.chunks : [dictionary];
                for (const chunk of chunks) {
                    this._writeDictionaryBatch(chunk, id, offset > 0);
                    offset += chunk.length;
                }
            }
        }
        return this;
    }
}
/** @ignore */
class extension_RecordBatchStreamWriter extends extension_RecordBatchWriter {
    /** @nocollapse */
    static writeAll(input, options) {
        const writer = new extension_RecordBatchStreamWriter(options);
        if (extension_isPromise(input)) {
            return input.then((x) => writer.writeAll(x));
        }
        else if (extension_isAsyncIterable(input)) {
            return extension_writeAllAsync(writer, input);
        }
        return extension_writeAll(writer, input);
    }
}
/** @ignore */
class extension_RecordBatchFileWriter extends extension_RecordBatchWriter {
    /** @nocollapse */
    static writeAll(input) {
        const writer = new extension_RecordBatchFileWriter();
        if (extension_isPromise(input)) {
            return input.then((x) => writer.writeAll(x));
        }
        else if (extension_isAsyncIterable(input)) {
            return extension_writeAllAsync(writer, input);
        }
        return extension_writeAll(writer, input);
    }
    constructor() {
        super();
        this._autoDestroy = true;
    }
    // @ts-ignore
    _writeSchema(schema) {
        return this._writeMagic()._writePadding(2);
    }
    _writeFooter(schema) {
        const buffer = extension_Footer_.encode(new extension_Footer_(schema, extension_MetadataVersion.V4, this._recordBatchBlocks, this._dictionaryBlocks));
        return super
            ._writeFooter(schema) // EOS bytes for sequential readers
            ._write(buffer) // Write the flatbuffer
            ._write(Int32Array.of(buffer.byteLength)) // then the footer size suffix
            ._writeMagic(); // then the magic suffix
    }
}
/** @ignore */
class extension_RecordBatchJSONWriter extends extension_RecordBatchWriter {
    constructor() {
        super();
        this._autoDestroy = true;
        this._recordBatches = [];
        this._dictionaries = [];
    }
    /** @nocollapse */
    static writeAll(input) {
        return new extension_RecordBatchJSONWriter().writeAll(input);
    }
    _writeMessage() { return this; }
    // @ts-ignore
    _writeFooter(schema) { return this; }
    _writeSchema(schema) {
        return this._write(`{\n  "schema": ${JSON.stringify({ fields: schema.fields.map(extension_fieldToJSON) }, null, 2)}`);
    }
    _writeDictionaries(batch) {
        if (batch.dictionaries.size > 0) {
            this._dictionaries.push(batch);
        }
        return this;
    }
    _writeDictionaryBatch(dictionary, id, isDelta = false) {
        this._dictionaryDeltaOffsets.set(id, dictionary.length + (this._dictionaryDeltaOffsets.get(id) || 0));
        this._write(this._dictionaryBlocks.length === 0 ? `    ` : `,\n    `);
        this._write(`${extension_dictionaryBatchToJSON(dictionary, id, isDelta)}`);
        this._dictionaryBlocks.push(new extension_FileBlock(0, 0, 0));
        return this;
    }
    _writeRecordBatch(batch) {
        this._writeDictionaries(batch);
        this._recordBatches.push(batch);
        return this;
    }
    close() {
        if (this._dictionaries.length > 0) {
            this._write(`,\n  "dictionaries": [\n`);
            for (const batch of this._dictionaries) {
                super._writeDictionaries(batch);
            }
            this._write(`\n  ]`);
        }
        if (this._recordBatches.length > 0) {
            for (let i = -1, n = this._recordBatches.length; ++i < n;) {
                this._write(i === 0 ? `,\n  "batches": [\n    ` : `,\n    `);
                this._write(`${extension_recordBatchToJSON(this._recordBatches[i])}`);
                this._recordBatchBlocks.push(new extension_FileBlock(0, 0, 0));
            }
            this._write(`\n  ]`);
        }
        if (this._schema) {
            this._write(`\n}`);
        }
        this._dictionaries = [];
        this._recordBatches = [];
        return super.close();
    }
}
/** @ignore */
function extension_writeAll(writer, input) {
    let chunks = input;
    if (input instanceof extension_table_Table) {
        chunks = input.chunks;
        writer.reset(undefined, input.schema);
    }
    for (const batch of chunks) {
        writer.write(batch);
    }
    return writer.finish();
}
/** @ignore */
async function extension_writeAllAsync(writer, batches) {
    for await (const batch of batches) {
        writer.write(batch);
    }
    return writer.finish();
}
/** @ignore */
function extension_fieldToJSON({ name, type, nullable }) {
    const assembler = new extension_JSONTypeAssembler();
    return {
        'name': name, 'nullable': nullable,
        'type': assembler.visit(type),
        'children': (type.children || []).map(extension_fieldToJSON),
        'dictionary': !extension_DataType.isDictionary(type) ? undefined : {
            'id': type.id,
            'isOrdered': type.isOrdered,
            'indexType': assembler.visit(type.indices)
        }
    };
}
/** @ignore */
function extension_dictionaryBatchToJSON(dictionary, id, isDelta = false) {
    const field = new extension_Field(`${id}`, dictionary.type, dictionary.nullCount > 0);
    const columns = extension_JSONVectorAssembler.assemble(new extension_column_Column(field, [dictionary]));
    return JSON.stringify({
        'id': id,
        'isDelta': isDelta,
        'data': {
            'count': dictionary.length,
            'columns': columns
        }
    }, null, 2);
}
/** @ignore */
function extension_recordBatchToJSON(records) {
    return JSON.stringify({
        'count': records.length,
        'columns': extension_JSONVectorAssembler.assemble(records)
    }, null, 2);
}

//# sourceMappingURL=writer.mjs.map

;// ../../node_modules/apache-arrow/util/recordbatch.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




const extension_noopBuf = new Uint8Array(0);
const extension_nullBufs = (bitmapLength) => [
    extension_noopBuf, extension_noopBuf, new Uint8Array(bitmapLength), extension_noopBuf
];
/** @ignore */
function extension_ensureSameLengthData(schema, chunks, batchLength = chunks.reduce((l, c) => Math.max(l, c.length), 0)) {
    let data;
    let field;
    let i = -1, n = chunks.length;
    const fields = [...schema.fields];
    const batchData = [];
    const bitmapLength = ((batchLength + 63) & ~63) >> 3;
    while (++i < n) {
        if ((data = chunks[i]) && data.length === batchLength) {
            batchData[i] = data;
        }
        else {
            (field = fields[i]).nullable || (fields[i] = fields[i].clone({ nullable: true }));
            batchData[i] = data ? data._changeLengthAndBackfillNullBitmap(batchLength)
                : extension_Data.new(field.type, 0, batchLength, batchLength, extension_nullBufs(bitmapLength));
        }
    }
    return [new extension_Schema(fields), batchLength, batchData];
}
/** @ignore */
function extension_distributeColumnsIntoRecordBatches(columns) {
    return extension_distributeVectorsIntoRecordBatches(new extension_Schema(columns.map(({ field }) => field)), columns);
}
/** @ignore */
function extension_distributeVectorsIntoRecordBatches(schema, vecs) {
    return extension_uniformlyDistributeChunksAcrossRecordBatches(schema, vecs.map((v) => v instanceof extension_Chunked ? v.chunks.map((c) => c.data) : [v.data]));
}
/** @ignore */
function extension_uniformlyDistributeChunksAcrossRecordBatches(schema, columns) {
    const fields = [...schema.fields];
    const batchArgs = [];
    const memo = { numBatches: columns.reduce((n, c) => Math.max(n, c.length), 0) };
    let numBatches = 0, batchLength = 0;
    let i = -1, numColumns = columns.length;
    let child, childData = [];
    while (memo.numBatches-- > 0) {
        for (batchLength = Number.POSITIVE_INFINITY, i = -1; ++i < numColumns;) {
            childData[i] = child = columns[i].shift();
            batchLength = Math.min(batchLength, child ? child.length : batchLength);
        }
        if (isFinite(batchLength)) {
            childData = extension_distributeChildData(fields, batchLength, childData, columns, memo);
            if (batchLength > 0) {
                batchArgs[numBatches++] = [batchLength, childData.slice()];
            }
        }
    }
    return [
        schema = new extension_Schema(fields, schema.metadata),
        batchArgs.map((xs) => new extension_recordbatch_RecordBatch(schema, ...xs))
    ];
}
/** @ignore */
function extension_distributeChildData(fields, batchLength, childData, columns, memo) {
    let data;
    let field;
    let length = 0, i = -1, n = columns.length;
    const bitmapLength = ((batchLength + 63) & ~63) >> 3;
    while (++i < n) {
        if ((data = childData[i]) && ((length = data.length) >= batchLength)) {
            if (length === batchLength) {
                childData[i] = data;
            }
            else {
                childData[i] = data.slice(0, batchLength);
                data = data.slice(batchLength, length - batchLength);
                memo.numBatches = Math.max(memo.numBatches, columns[i].unshift(data));
            }
        }
        else {
            (field = fields[i]).nullable || (fields[i] = field.clone({ nullable: true }));
            childData[i] = data ? data._changeLengthAndBackfillNullBitmap(batchLength)
                : extension_Data.new(field.type, 0, batchLength, batchLength, extension_nullBufs(bitmapLength));
        }
    }
    return childData;
}

//# sourceMappingURL=recordbatch.mjs.map

;// ../../node_modules/apache-arrow/vector/base.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
class extension_BaseVector extends extension_AbstractVector {
    constructor(data, children) {
        super();
        this._children = children;
        this.numChildren = data.childData.length;
        this._bindDataAccessors(this.data = data);
    }
    get type() { return this.data.type; }
    get typeId() { return this.data.typeId; }
    get length() { return this.data.length; }
    get offset() { return this.data.offset; }
    get stride() { return this.data.stride; }
    get nullCount() { return this.data.nullCount; }
    get byteLength() { return this.data.byteLength; }
    get VectorName() { return `${extension_Type[this.typeId]}Vector`; }
    get ArrayType() { return this.type.ArrayType; }
    get values() { return this.data.values; }
    get typeIds() { return this.data.typeIds; }
    get nullBitmap() { return this.data.nullBitmap; }
    get valueOffsets() { return this.data.valueOffsets; }
    get [Symbol.toStringTag]() { return `${this.VectorName}<${this.type[Symbol.toStringTag]}>`; }
    clone(data, children = this._children) {
        return extension_AbstractVector.new(data, children);
    }
    concat(...others) {
        return extension_Chunked.concat(this, ...others);
    }
    slice(begin, end) {
        // Adjust args similar to Array.prototype.slice. Normalize begin/end to
        // clamp between 0 and length, and wrap around on negative indices, e.g.
        // slice(-1, 5) or slice(5, -1)
        return extension_clampRange(this, begin, end, this._sliceInternal);
    }
    isValid(index) {
        if (this.nullCount > 0) {
            const idx = this.offset + index;
            const val = this.nullBitmap[idx >> 3];
            const mask = (val & (1 << (idx % 8)));
            return mask !== 0;
        }
        return true;
    }
    getChildAt(index) {
        return index < 0 || index >= this.numChildren ? null : ((this._children || (this._children = []))[index] ||
            (this._children[index] = extension_AbstractVector.new(this.data.childData[index])));
    }
    toJSON() { return [...this]; }
    _sliceInternal(self, begin, end) {
        return self.clone(self.data.slice(begin, end - begin), null);
    }
    // @ts-ignore
    _bindDataAccessors(data) {
        // Implementation in src/vectors/index.ts due to circular dependency/packaging shenanigans
    }
}
extension_BaseVector.prototype[Symbol.isConcatSpreadable] = true;

//# sourceMappingURL=base.mjs.map

;// ../../node_modules/apache-arrow/vector/binary.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.



/** @ignore */
class extension_BinaryVector extends extension_BaseVector {
    asUtf8() {
        return extension_AbstractVector.new(this.data.clone(new extension_Utf8()));
    }
}

//# sourceMappingURL=binary.mjs.map

;// ../../node_modules/apache-arrow/vector/bool.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.



/** @ignore */
class extension_BoolVector extends extension_BaseVector {
    /** @nocollapse */
    static from(input) {
        return extension_vectorFromValuesWithType(() => new extension_Bool(), input);
    }
}

//# sourceMappingURL=bool.mjs.map

;// ../../node_modules/apache-arrow/vector/date.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
class extension_DateVector extends extension_BaseVector {
    /** @nocollapse */
    static from(...args) {
        if (args.length === 2) {
            return extension_vectorFromValuesWithType(() => args[1] === extension_DateUnit.DAY ? new extension_DateDay() : new extension_DateMillisecond(), args[0]);
        }
        return extension_vectorFromValuesWithType(() => new extension_DateMillisecond(), args[0]);
    }
}
/** @ignore */
class extension_DateDayVector extends extension_DateVector {
}
/** @ignore */
class extension_DateMillisecondVector extends extension_DateVector {
}

//# sourceMappingURL=date.mjs.map

;// ../../node_modules/apache-arrow/vector/decimal.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_DecimalVector extends extension_BaseVector {
}

//# sourceMappingURL=decimal.mjs.map

;// ../../node_modules/apache-arrow/vector/dictionary.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.





/** @ignore */
class extension_DictionaryVector extends extension_BaseVector {
    constructor(data) {
        super(data);
        this.indices = extension_AbstractVector.new(data.clone(this.type.indices));
    }
    /** @nocollapse */
    static from(...args) {
        if (args.length === 3) {
            const [values, indices, keys] = args;
            const type = new extension_type_Dictionary(values.type, indices, null, null);
            return extension_AbstractVector.new(extension_Data.Dictionary(type, 0, keys.length, 0, null, keys, values));
        }
        return extension_vectorFromValuesWithType(() => args[0].type, args[0]);
    }
    get dictionary() { return this.data.dictionary; }
    reverseLookup(value) { return this.dictionary.indexOf(value); }
    getKey(idx) { return this.indices.get(idx); }
    getValue(key) { return this.dictionary.get(key); }
    setKey(idx, key) { return this.indices.set(idx, key); }
    setValue(key, value) { return this.dictionary.set(key, value); }
}
extension_DictionaryVector.prototype.indices = null;

//# sourceMappingURL=dictionary.mjs.map

;// ../../node_modules/apache-arrow/vector/fixedsizebinary.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_FixedSizeBinaryVector extends extension_BaseVector {
}

//# sourceMappingURL=fixedsizebinary.mjs.map

;// ../../node_modules/apache-arrow/vector/fixedsizelist.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_FixedSizeListVector extends extension_BaseVector {
}

//# sourceMappingURL=fixedsizelist.mjs.map

;// ../../node_modules/apache-arrow/vector/float.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.





/** @ignore */
class extension_FloatVector extends extension_BaseVector {
    /** @nocollapse */
    static from(input) {
        let ArrowType = extension_vectorTypeToDataType(this);
        if ((input instanceof ArrayBuffer) || ArrayBuffer.isView(input)) {
            let InputType = extension_arrayTypeToDataType(input.constructor) || ArrowType;
            // Special case, infer the Arrow DataType from the input if calling the base
            // FloatVector.from with a TypedArray, e.g. `FloatVector.from(new Float32Array())`
            if (ArrowType === null) {
                ArrowType = InputType;
            }
            // If the DataType inferred from the Vector constructor matches the
            // DataType inferred from the input arguments, return zero-copy view
            if (ArrowType && ArrowType === InputType) {
                let type = new ArrowType();
                let length = input.byteLength / type.ArrayType.BYTES_PER_ELEMENT;
                // If the ArrowType is Float16 but the input type isn't a Uint16Array,
                // let the Float16Builder handle casting the input values to Uint16s.
                if (!extension_convertTo16Bit(ArrowType, input.constructor)) {
                    return extension_AbstractVector.new(extension_Data.Float(type, 0, length, 0, null, input));
                }
            }
        }
        if (ArrowType) {
            // If the DataType inferred from the Vector constructor is different than
            // the DataType inferred from the input TypedArray, or if input isn't a
            // TypedArray, use the Builders to construct the result Vector
            return extension_vectorFromValuesWithType(() => new ArrowType(), input);
        }
        if ((input instanceof DataView) || (input instanceof ArrayBuffer)) {
            throw new TypeError(`Cannot infer float type from instance of ${input.constructor.name}`);
        }
        throw new TypeError('Unrecognized FloatVector input');
    }
}
/** @ignore */
class extension_Float16Vector extends extension_FloatVector {
    // Since JS doesn't have half floats, `toArray()` returns a zero-copy slice
    // of the underlying Uint16Array data. This behavior ensures we don't incur
    // extra compute or copies if you're calling `toArray()` in order to create
    // a buffer for something like WebGL. Buf if you're using JS and want typed
    // arrays of 4-to-8-byte precision, these methods will enumerate the values
    // and clamp to the desired byte lengths.
    toFloat32Array() { return new Float32Array(this); }
    toFloat64Array() { return new Float64Array(this); }
}
/** @ignore */
class extension_Float32Vector extends extension_FloatVector {
}
/** @ignore */
class extension_Float64Vector extends extension_FloatVector {
}
const extension_convertTo16Bit = (typeCtor, dataCtor) => {
    return (typeCtor === extension_Float16) && (dataCtor !== Uint16Array);
};
/** @ignore */
const extension_arrayTypeToDataType = (ctor) => {
    switch (ctor) {
        case Uint16Array: return extension_Float16;
        case Float32Array: return extension_Float32;
        case Float64Array: return extension_Float64;
        default: return null;
    }
};
/** @ignore */
const extension_vectorTypeToDataType = (ctor) => {
    switch (ctor) {
        case extension_Float16Vector: return extension_Float16;
        case extension_Float32Vector: return extension_Float32;
        case extension_Float64Vector: return extension_Float64;
        default: return null;
    }
};

//# sourceMappingURL=float.mjs.map

;// ../../node_modules/apache-arrow/vector/interval.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_IntervalVector extends extension_BaseVector {
}
/** @ignore */
class extension_IntervalDayTimeVector extends extension_IntervalVector {
}
/** @ignore */
class extension_IntervalYearMonthVector extends extension_IntervalVector {
}

//# sourceMappingURL=interval.mjs.map

;// ../../node_modules/apache-arrow/vector/int.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.







/** @ignore */
class extension_IntVector extends extension_BaseVector {
    /** @nocollapse */
    static from(...args) {
        let [input, is64bit = false] = args;
        let ArrowType = extension_int_vectorTypeToDataType(this, is64bit);
        if ((input instanceof ArrayBuffer) || ArrayBuffer.isView(input)) {
            let InputType = extension_int_arrayTypeToDataType(input.constructor, is64bit) || ArrowType;
            // Special case, infer the Arrow DataType from the input if calling the base
            // IntVector.from with a TypedArray, e.g. `IntVector.from(new Int32Array())`
            if (ArrowType === null) {
                ArrowType = InputType;
            }
            // If the DataType inferred from the Vector constructor matches the
            // DataType inferred from the input arguments, return zero-copy view
            if (ArrowType && ArrowType === InputType) {
                let type = new ArrowType();
                let length = input.byteLength / type.ArrayType.BYTES_PER_ELEMENT;
                // If the ArrowType is 64bit but the input type is 32bit pairs, update the logical length
                if (extension_convert32To64Bit(ArrowType, input.constructor)) {
                    length *= 0.5;
                }
                return extension_AbstractVector.new(extension_Data.Int(type, 0, length, 0, null, input));
            }
        }
        if (ArrowType) {
            // If the DataType inferred from the Vector constructor is different than
            // the DataType inferred from the input TypedArray, or if input isn't a
            // TypedArray, use the Builders to construct the result Vector
            return extension_vectorFromValuesWithType(() => new ArrowType(), input);
        }
        if ((input instanceof DataView) || (input instanceof ArrayBuffer)) {
            throw new TypeError(`Cannot infer integer type from instance of ${input.constructor.name}`);
        }
        throw new TypeError('Unrecognized IntVector input');
    }
}
/** @ignore */
class extension_Int8Vector extends extension_IntVector {
}
/** @ignore */
class extension_Int16Vector extends extension_IntVector {
}
/** @ignore */
class extension_Int32Vector extends extension_IntVector {
}
/** @ignore */
class extension_Int64Vector extends extension_IntVector {
    toBigInt64Array() {
        return extension_toBigInt64Array(this.values);
    }
    get values64() {
        return this._values64 || (this._values64 = this.toBigInt64Array());
    }
}
/** @ignore */
class extension_Uint8Vector extends extension_IntVector {
}
/** @ignore */
class extension_Uint16Vector extends extension_IntVector {
}
/** @ignore */
class extension_Uint32Vector extends extension_IntVector {
}
/** @ignore */
class extension_Uint64Vector extends extension_IntVector {
    toBigUint64Array() {
        return extension_toBigUint64Array(this.values);
    }
    get values64() {
        return this._values64 || (this._values64 = this.toBigUint64Array());
    }
}
const extension_convert32To64Bit = (typeCtor, dataCtor) => {
    return (typeCtor === extension_Int64 || typeCtor === extension_Uint64) &&
        (dataCtor === Int32Array || dataCtor === Uint32Array);
};
/** @ignore */
const extension_int_arrayTypeToDataType = (ctor, is64bit) => {
    switch (ctor) {
        case Int8Array: return extension_Int8;
        case Int16Array: return extension_Int16;
        case Int32Array: return is64bit ? extension_Int64 : extension_Int32;
        case extension_BigInt64ArrayCtor: return extension_Int64;
        case Uint8Array: return extension_Uint8;
        case Uint16Array: return extension_Uint16;
        case Uint32Array: return is64bit ? extension_Uint64 : extension_Uint32;
        case extension_BigUint64ArrayCtor: return extension_Uint64;
        default: return null;
    }
};
/** @ignore */
const extension_int_vectorTypeToDataType = (ctor, is64bit) => {
    switch (ctor) {
        case extension_Int8Vector: return extension_Int8;
        case extension_Int16Vector: return extension_Int16;
        case extension_Int32Vector: return is64bit ? extension_Int64 : extension_Int32;
        case extension_Int64Vector: return extension_Int64;
        case extension_Uint8Vector: return extension_Uint8;
        case extension_Uint16Vector: return extension_Uint16;
        case extension_Uint32Vector: return is64bit ? extension_Uint64 : extension_Uint32;
        case extension_Uint64Vector: return extension_Uint64;
        default: return null;
    }
};

//# sourceMappingURL=int.mjs.map

;// ../../node_modules/apache-arrow/vector/list.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_ListVector extends extension_BaseVector {
}

//# sourceMappingURL=list.mjs.map

;// ../../node_modules/apache-arrow/vector/map.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
class extension_MapVector extends extension_BaseVector {
    asList() {
        const child = this.type.children[0];
        return extension_AbstractVector.new(this.data.clone(new extension_List(child)));
    }
    bind(index) {
        const child = this.getChildAt(0);
        const { [index]: begin, [index + 1]: end } = this.valueOffsets;
        return new extension_MapRow(child.slice(begin, end));
    }
}

//# sourceMappingURL=map.mjs.map

;// ../../node_modules/apache-arrow/vector/null.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_NullVector extends extension_BaseVector {
}

//# sourceMappingURL=null.mjs.map

;// ../../node_modules/apache-arrow/vector/struct.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore */ const extension_struct_kRowIndex = Symbol.for('rowIndex');
/** @ignore */
class extension_StructVector extends extension_BaseVector {
    bind(index) {
        const proto = this._row || (this._row = new extension_StructRow(this));
        const bound = Object.create(proto);
        bound[extension_struct_kRowIndex] = index;
        return bound;
    }
}

//# sourceMappingURL=struct.mjs.map

;// ../../node_modules/apache-arrow/vector/timestamp.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_TimestampVector extends extension_BaseVector {
}
/** @ignore */
class extension_TimestampSecondVector extends extension_TimestampVector {
}
/** @ignore */
class extension_TimestampMillisecondVector extends extension_TimestampVector {
}
/** @ignore */
class extension_TimestampMicrosecondVector extends extension_TimestampVector {
}
/** @ignore */
class extension_TimestampNanosecondVector extends extension_TimestampVector {
}

//# sourceMappingURL=timestamp.mjs.map

;// ../../node_modules/apache-arrow/vector/time.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_TimeVector extends extension_BaseVector {
}
/** @ignore */
class extension_TimeSecondVector extends extension_TimeVector {
}
/** @ignore */
class extension_TimeMillisecondVector extends extension_TimeVector {
}
/** @ignore */
class extension_TimeMicrosecondVector extends extension_TimeVector {
}
/** @ignore */
class extension_TimeNanosecondVector extends extension_TimeVector {
}

//# sourceMappingURL=time.mjs.map

;// ../../node_modules/apache-arrow/vector/union.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_UnionVector extends extension_BaseVector {
    get typeIdToChildIndex() { return this.data.type.typeIdToChildIndex; }
}
/** @ignore */
class extension_DenseUnionVector extends extension_UnionVector {
    get valueOffsets() { return this.data.valueOffsets; }
}
/** @ignore */
class extension_SparseUnionVector extends extension_UnionVector {
}

//# sourceMappingURL=union.mjs.map

;// ../../node_modules/apache-arrow/vector/utf8.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
class extension_Utf8Vector extends extension_BaseVector {
    /** @nocollapse */
    static from(input) {
        return extension_vectorFromValuesWithType(() => new extension_Utf8(), input);
    }
    asBinary() {
        return extension_AbstractVector.new(this.data.clone(new extension_Binary()));
    }
}

//# sourceMappingURL=utf8.mjs.map

;// ../../node_modules/apache-arrow/util/fn.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
/** @ignore */
function extension_partial0(visit) {
    return function () { return visit(this); };
}
/** @ignore */
function extension_partial1(visit) {
    return function (a) { return visit(this, a); };
}
/** @ignore */
function extension_partial2(visit) {
    return function (a, b) { return visit(this, a, b); };
}

//# sourceMappingURL=fn.mjs.map

;// ../../node_modules/apache-arrow/visitor/get.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.





/** @ignore */
class extension_GetVisitor extends extension_Visitor {
}
/** @ignore */ const extension_epochDaysToMs = (data, index) => 86400000 * data[index];
/** @ignore */ const extension_epochMillisecondsLongToMs = (data, index) => 4294967296 * (data[index + 1]) + (data[index] >>> 0);
/** @ignore */ const extension_epochMicrosecondsLongToMs = (data, index) => 4294967296 * (data[index + 1] / 1000) + ((data[index] >>> 0) / 1000);
/** @ignore */ const extension_epochNanosecondsLongToMs = (data, index) => 4294967296 * (data[index + 1] / 1000000) + ((data[index] >>> 0) / 1000000);
/** @ignore */ const extension_epochMillisecondsToDate = (epochMs) => new Date(epochMs);
/** @ignore */ const extension_epochDaysToDate = (data, index) => extension_epochMillisecondsToDate(extension_epochDaysToMs(data, index));
/** @ignore */ const extension_epochMillisecondsLongToDate = (data, index) => extension_epochMillisecondsToDate(extension_epochMillisecondsLongToMs(data, index));
/** @ignore */
const extension_getNull = (_vector, _index) => null;
/** @ignore */
const extension_getVariableWidthBytes = (values, valueOffsets, index) => {
    const { [index]: x, [index + 1]: y } = valueOffsets;
    return x != null && y != null ? values.subarray(x, y) : null;
};
/** @ignore */
const extension_get_getBool = ({ offset, values }, index) => {
    const idx = offset + index;
    const byte = values[idx >> 3];
    return (byte & 1 << (idx % 8)) !== 0;
};
/** @ignore */
const extension_getDateDay = ({ values }, index) => extension_epochDaysToDate(values, index);
/** @ignore */
const extension_getDateMillisecond = ({ values }, index) => extension_epochMillisecondsLongToDate(values, index * 2);
/** @ignore */
const extension_getNumeric = ({ stride, values }, index) => values[stride * index];
/** @ignore */
const extension_getFloat16 = ({ stride, values }, index) => extension_uint16ToFloat64(values[stride * index]);
/** @ignore */
const extension_getBigInts = ({ stride, values, type }, index) => extension_BN.new(values.subarray(stride * index, stride * (index + 1)), type.isSigned);
/** @ignore */
const extension_getFixedSizeBinary = ({ stride, values }, index) => values.subarray(stride * index, stride * (index + 1));
/** @ignore */
const extension_getBinary = ({ values, valueOffsets }, index) => extension_getVariableWidthBytes(values, valueOffsets, index);
/** @ignore */
const extension_getUtf8 = ({ values, valueOffsets }, index) => {
    const bytes = extension_getVariableWidthBytes(values, valueOffsets, index);
    return bytes !== null ? extension_decodeUtf8(bytes) : null;
};
/* istanbul ignore next */
/** @ignore */
const extension_getInt = (vector, index) => (vector.type.bitWidth < 64
    ? extension_getNumeric(vector, index)
    : extension_getBigInts(vector, index));
/* istanbul ignore next */
/** @ignore */
const extension_getFloat = (vector, index) => (vector.type.precision !== extension_Precision.HALF
    ? extension_getNumeric(vector, index)
    : extension_getFloat16(vector, index));
/* istanbul ignore next */
/** @ignore */
const extension_getDate = (vector, index) => (vector.type.unit === extension_DateUnit.DAY
    ? extension_getDateDay(vector, index)
    : extension_getDateMillisecond(vector, index));
/** @ignore */
const extension_getTimestampSecond = ({ values }, index) => 1000 * extension_epochMillisecondsLongToMs(values, index * 2);
/** @ignore */
const extension_getTimestampMillisecond = ({ values }, index) => extension_epochMillisecondsLongToMs(values, index * 2);
/** @ignore */
const extension_getTimestampMicrosecond = ({ values }, index) => extension_epochMicrosecondsLongToMs(values, index * 2);
/** @ignore */
const extension_getTimestampNanosecond = ({ values }, index) => extension_epochNanosecondsLongToMs(values, index * 2);
/* istanbul ignore next */
/** @ignore */
const extension_getTimestamp = (vector, index) => {
    switch (vector.type.unit) {
        case extension_TimeUnit.SECOND: return extension_getTimestampSecond(vector, index);
        case extension_TimeUnit.MILLISECOND: return extension_getTimestampMillisecond(vector, index);
        case extension_TimeUnit.MICROSECOND: return extension_getTimestampMicrosecond(vector, index);
        case extension_TimeUnit.NANOSECOND: return extension_getTimestampNanosecond(vector, index);
    }
};
/** @ignore */
const extension_getTimeSecond = ({ values, stride }, index) => values[stride * index];
/** @ignore */
const extension_getTimeMillisecond = ({ values, stride }, index) => values[stride * index];
/** @ignore */
const extension_getTimeMicrosecond = ({ values }, index) => extension_BN.signed(values.subarray(2 * index, 2 * (index + 1)));
/** @ignore */
const extension_getTimeNanosecond = ({ values }, index) => extension_BN.signed(values.subarray(2 * index, 2 * (index + 1)));
/* istanbul ignore next */
/** @ignore */
const extension_getTime = (vector, index) => {
    switch (vector.type.unit) {
        case extension_TimeUnit.SECOND: return extension_getTimeSecond(vector, index);
        case extension_TimeUnit.MILLISECOND: return extension_getTimeMillisecond(vector, index);
        case extension_TimeUnit.MICROSECOND: return extension_getTimeMicrosecond(vector, index);
        case extension_TimeUnit.NANOSECOND: return extension_getTimeNanosecond(vector, index);
    }
};
/** @ignore */
const extension_getDecimal = ({ values }, index) => extension_BN.decimal(values.subarray(4 * index, 4 * (index + 1)));
/** @ignore */
const extension_getList = (vector, index) => {
    const child = vector.getChildAt(0), { valueOffsets, stride } = vector;
    return child.slice(valueOffsets[index * stride], valueOffsets[(index * stride) + 1]);
};
/** @ignore */
const extension_getMap = (vector, index) => {
    return vector.bind(index);
};
/** @ignore */
const extension_getStruct = (vector, index) => {
    return vector.bind(index);
};
/* istanbul ignore next */
/** @ignore */
const extension_getUnion = (vector, index) => {
    return vector.type.mode === extension_UnionMode.Dense ?
        extension_getDenseUnion(vector, index) :
        extension_getSparseUnion(vector, index);
};
/** @ignore */
const extension_getDenseUnion = (vector, index) => {
    const childIndex = vector.typeIdToChildIndex[vector.typeIds[index]];
    const child = vector.getChildAt(childIndex);
    return child ? child.get(vector.valueOffsets[index]) : null;
};
/** @ignore */
const extension_getSparseUnion = (vector, index) => {
    const childIndex = vector.typeIdToChildIndex[vector.typeIds[index]];
    const child = vector.getChildAt(childIndex);
    return child ? child.get(index) : null;
};
/** @ignore */
const extension_getDictionary = (vector, index) => {
    return vector.getValue(vector.getKey(index));
};
/* istanbul ignore next */
/** @ignore */
const extension_getInterval = (vector, index) => (vector.type.unit === extension_IntervalUnit.DAY_TIME)
    ? extension_getIntervalDayTime(vector, index)
    : extension_getIntervalYearMonth(vector, index);
/** @ignore */
const extension_getIntervalDayTime = ({ values }, index) => values.subarray(2 * index, 2 * (index + 1));
/** @ignore */
const extension_getIntervalYearMonth = ({ values }, index) => {
    const interval = values[index];
    const int32s = new Int32Array(2);
    int32s[0] = interval / 12 | 0; /* years */
    int32s[1] = interval % 12 | 0; /* months */
    return int32s;
};
/** @ignore */
const extension_getFixedSizeList = (vector, index) => {
    const child = vector.getChildAt(0), { stride } = vector;
    return child.slice(index * stride, (index + 1) * stride);
};
extension_GetVisitor.prototype.visitNull = extension_getNull;
extension_GetVisitor.prototype.visitBool = extension_get_getBool;
extension_GetVisitor.prototype.visitInt = extension_getInt;
extension_GetVisitor.prototype.visitInt8 = extension_getNumeric;
extension_GetVisitor.prototype.visitInt16 = extension_getNumeric;
extension_GetVisitor.prototype.visitInt32 = extension_getNumeric;
extension_GetVisitor.prototype.visitInt64 = extension_getBigInts;
extension_GetVisitor.prototype.visitUint8 = extension_getNumeric;
extension_GetVisitor.prototype.visitUint16 = extension_getNumeric;
extension_GetVisitor.prototype.visitUint32 = extension_getNumeric;
extension_GetVisitor.prototype.visitUint64 = extension_getBigInts;
extension_GetVisitor.prototype.visitFloat = extension_getFloat;
extension_GetVisitor.prototype.visitFloat16 = extension_getFloat16;
extension_GetVisitor.prototype.visitFloat32 = extension_getNumeric;
extension_GetVisitor.prototype.visitFloat64 = extension_getNumeric;
extension_GetVisitor.prototype.visitUtf8 = extension_getUtf8;
extension_GetVisitor.prototype.visitBinary = extension_getBinary;
extension_GetVisitor.prototype.visitFixedSizeBinary = extension_getFixedSizeBinary;
extension_GetVisitor.prototype.visitDate = extension_getDate;
extension_GetVisitor.prototype.visitDateDay = extension_getDateDay;
extension_GetVisitor.prototype.visitDateMillisecond = extension_getDateMillisecond;
extension_GetVisitor.prototype.visitTimestamp = extension_getTimestamp;
extension_GetVisitor.prototype.visitTimestampSecond = extension_getTimestampSecond;
extension_GetVisitor.prototype.visitTimestampMillisecond = extension_getTimestampMillisecond;
extension_GetVisitor.prototype.visitTimestampMicrosecond = extension_getTimestampMicrosecond;
extension_GetVisitor.prototype.visitTimestampNanosecond = extension_getTimestampNanosecond;
extension_GetVisitor.prototype.visitTime = extension_getTime;
extension_GetVisitor.prototype.visitTimeSecond = extension_getTimeSecond;
extension_GetVisitor.prototype.visitTimeMillisecond = extension_getTimeMillisecond;
extension_GetVisitor.prototype.visitTimeMicrosecond = extension_getTimeMicrosecond;
extension_GetVisitor.prototype.visitTimeNanosecond = extension_getTimeNanosecond;
extension_GetVisitor.prototype.visitDecimal = extension_getDecimal;
extension_GetVisitor.prototype.visitList = extension_getList;
extension_GetVisitor.prototype.visitStruct = extension_getStruct;
extension_GetVisitor.prototype.visitUnion = extension_getUnion;
extension_GetVisitor.prototype.visitDenseUnion = extension_getDenseUnion;
extension_GetVisitor.prototype.visitSparseUnion = extension_getSparseUnion;
extension_GetVisitor.prototype.visitDictionary = extension_getDictionary;
extension_GetVisitor.prototype.visitInterval = extension_getInterval;
extension_GetVisitor.prototype.visitIntervalDayTime = extension_getIntervalDayTime;
extension_GetVisitor.prototype.visitIntervalYearMonth = extension_getIntervalYearMonth;
extension_GetVisitor.prototype.visitFixedSizeList = extension_getFixedSizeList;
extension_GetVisitor.prototype.visitMap = extension_getMap;
/** @ignore */
const extension_get_instance = new extension_GetVisitor();

//# sourceMappingURL=get.mjs.map

;// ../../node_modules/apache-arrow/visitor/indexof.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.



/** @ignore */
class extension_IndexOfVisitor extends extension_Visitor {
}
/** @ignore */
function extension_nullIndexOf(vector, searchElement) {
    // if you're looking for nulls and the vector isn't empty, we've got 'em!
    return searchElement === null && vector.length > 0 ? 0 : -1;
}
/** @ignore */
function extension_indexOfNull(vector, fromIndex) {
    const { nullBitmap } = vector.data;
    if (!nullBitmap || vector.nullCount <= 0) {
        return -1;
    }
    let i = 0;
    for (const isValid of extension_iterateBits(nullBitmap, vector.data.offset + (fromIndex || 0), vector.length, nullBitmap, extension_getBool)) {
        if (!isValid) {
            return i;
        }
        ++i;
    }
    return -1;
}
/** @ignore */
function extension_indexOfValue(vector, searchElement, fromIndex) {
    if (searchElement === undefined) {
        return -1;
    }
    if (searchElement === null) {
        return extension_indexOfNull(vector, fromIndex);
    }
    const compare = extension_createElementComparator(searchElement);
    for (let i = (fromIndex || 0) - 1, n = vector.length; ++i < n;) {
        if (compare(vector.get(i))) {
            return i;
        }
    }
    return -1;
}
/** @ignore */
function extension_indexOfUnion(vector, searchElement, fromIndex) {
    // Unions are special -- they do have a nullBitmap, but so can their children.
    // If the searchElement is null, we don't know whether it came from the Union's
    // bitmap or one of its childrens'. So we don't interrogate the Union's bitmap,
    // since that will report the wrong index if a child has a null before the Union.
    const compare = extension_createElementComparator(searchElement);
    for (let i = (fromIndex || 0) - 1, n = vector.length; ++i < n;) {
        if (compare(vector.get(i))) {
            return i;
        }
    }
    return -1;
}
extension_IndexOfVisitor.prototype.visitNull = extension_nullIndexOf;
extension_IndexOfVisitor.prototype.visitBool = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitInt = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitInt8 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitInt16 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitInt32 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitInt64 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitUint8 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitUint16 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitUint32 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitUint64 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitFloat = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitFloat16 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitFloat32 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitFloat64 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitUtf8 = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitBinary = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitFixedSizeBinary = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitDate = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitDateDay = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitDateMillisecond = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitTimestamp = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitTimestampSecond = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitTimestampMillisecond = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitTimestampMicrosecond = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitTimestampNanosecond = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitTime = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitTimeSecond = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitTimeMillisecond = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitTimeMicrosecond = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitTimeNanosecond = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitDecimal = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitList = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitStruct = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitUnion = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitDenseUnion = extension_indexOfUnion;
extension_IndexOfVisitor.prototype.visitSparseUnion = extension_indexOfUnion;
extension_IndexOfVisitor.prototype.visitDictionary = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitInterval = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitIntervalDayTime = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitIntervalYearMonth = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitFixedSizeList = extension_indexOfValue;
extension_IndexOfVisitor.prototype.visitMap = extension_indexOfValue;
/** @ignore */
const extension_indexof_instance = new extension_IndexOfVisitor();

//# sourceMappingURL=indexof.mjs.map

;// ../../node_modules/apache-arrow/visitor/iterator.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.




/** @ignore */
class extension_IteratorVisitor extends extension_Visitor {
}
/** @ignore */
function extension_nullableIterator(vector) {
    const getFn = extension_get_instance.getVisitFn(vector);
    return extension_iterateBits(vector.data.nullBitmap, vector.data.offset, vector.length, vector, (vec, idx, nullByte, nullBit) => ((nullByte & 1 << nullBit) !== 0) ? getFn(vec, idx) : null);
}
/** @ignore */
function extension_vectorIterator(vector) {
    // If nullable, iterate manually
    if (vector.nullCount > 0) {
        return extension_nullableIterator(vector);
    }
    const { type, typeId, length } = vector;
    // Fast case, defer to native iterators if possible
    if (vector.stride === 1 && ((typeId === extension_Type.Timestamp) ||
        (typeId === extension_Type.Int && type.bitWidth !== 64) ||
        (typeId === extension_Type.Time && type.bitWidth !== 64) ||
        (typeId === extension_Type.Float && type.precision > 0 /* Precision.HALF */))) {
        return vector.data.values.subarray(0, length)[Symbol.iterator]();
    }
    // Otherwise, iterate manually
    return (function* (getFn) {
        for (let index = -1; ++index < length;) {
            yield getFn(vector, index);
        }
    })(extension_get_instance.getVisitFn(vector));
}
extension_IteratorVisitor.prototype.visitNull = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitBool = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitInt = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitInt8 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitInt16 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitInt32 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitInt64 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitUint8 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitUint16 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitUint32 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitUint64 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitFloat = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitFloat16 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitFloat32 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitFloat64 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitUtf8 = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitBinary = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitFixedSizeBinary = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitDate = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitDateDay = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitDateMillisecond = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitTimestamp = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitTimestampSecond = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitTimestampMillisecond = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitTimestampMicrosecond = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitTimestampNanosecond = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitTime = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitTimeSecond = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitTimeMillisecond = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitTimeMicrosecond = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitTimeNanosecond = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitDecimal = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitList = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitStruct = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitUnion = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitDenseUnion = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitSparseUnion = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitDictionary = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitInterval = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitIntervalDayTime = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitIntervalYearMonth = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitFixedSizeList = extension_vectorIterator;
extension_IteratorVisitor.prototype.visitMap = extension_vectorIterator;
/** @ignore */
const extension_iterator_instance = new extension_IteratorVisitor();

//# sourceMappingURL=iterator.mjs.map

;// ../../node_modules/apache-arrow/visitor/toarray.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.



/** @ignore */
class extension_ToArrayVisitor extends extension_Visitor {
}
/** @ignore */
function extension_arrayOfVector(vector) {
    const { type, length, stride } = vector;
    // Fast case, return subarray if possible
    switch (type.typeId) {
        case extension_Type.Int:
        case extension_Type.Float:
        case extension_Type.Decimal:
        case extension_Type.Time:
        case extension_Type.Timestamp:
            return vector.data.values.subarray(0, length * stride);
    }
    // Otherwise if not primitive, slow copy
    return [...extension_iterator_instance.visit(vector)];
}
extension_ToArrayVisitor.prototype.visitNull = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitBool = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitInt = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitInt8 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitInt16 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitInt32 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitInt64 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitUint8 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitUint16 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitUint32 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitUint64 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitFloat = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitFloat16 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitFloat32 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitFloat64 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitUtf8 = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitBinary = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitFixedSizeBinary = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitDate = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitDateDay = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitDateMillisecond = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitTimestamp = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitTimestampSecond = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitTimestampMillisecond = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitTimestampMicrosecond = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitTimestampNanosecond = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitTime = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitTimeSecond = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitTimeMillisecond = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitTimeMicrosecond = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitTimeNanosecond = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitDecimal = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitList = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitStruct = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitUnion = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitDenseUnion = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitSparseUnion = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitDictionary = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitInterval = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitIntervalDayTime = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitIntervalYearMonth = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitFixedSizeList = extension_arrayOfVector;
extension_ToArrayVisitor.prototype.visitMap = extension_arrayOfVector;
/** @ignore */
const extension_toarray_instance = new extension_ToArrayVisitor();

//# sourceMappingURL=toarray.mjs.map

;// ../../node_modules/apache-arrow/visitor/bytewidth.mjs
/* istanbul ignore file */


/** @ignore */ const extension_bytewidth_sum = (x, y) => x + y;
/** @ignore */ const extension_variableWidthColumnErrorMessage = (type) => `Cannot compute the byte width of variable-width column ${type}`;
/** @ignore */
class extension_ByteWidthVisitor extends extension_Visitor {
    visitNull(____) { return 0; }
    visitInt(type) { return type.bitWidth / 8; }
    visitFloat(type) { return type.ArrayType.BYTES_PER_ELEMENT; }
    visitBinary(type) { throw new Error(extension_variableWidthColumnErrorMessage(type)); }
    visitUtf8(type) { throw new Error(extension_variableWidthColumnErrorMessage(type)); }
    visitBool(____) { return 1 / 8; }
    visitDecimal(____) { return 16; }
    visitDate(type) { return (type.unit + 1) * 4; }
    visitTime(type) { return type.bitWidth / 8; }
    visitTimestamp(type) { return type.unit === extension_TimeUnit.SECOND ? 4 : 8; }
    visitInterval(type) { return (type.unit + 1) * 4; }
    visitList(type) { throw new Error(extension_variableWidthColumnErrorMessage(type)); }
    visitStruct(type) { return this.visitFields(type.children).reduce(extension_bytewidth_sum, 0); }
    visitUnion(type) { return this.visitFields(type.children).reduce(extension_bytewidth_sum, 0); }
    visitFixedSizeBinary(type) { return type.byteWidth; }
    visitFixedSizeList(type) { return type.listSize * this.visitFields(type.children).reduce(extension_bytewidth_sum, 0); }
    visitMap(type) { return this.visitFields(type.children).reduce(extension_bytewidth_sum, 0); }
    visitDictionary(type) { return this.visit(type.indices); }
    visitFields(fields) { return (fields || []).map((field) => this.visit(field.type)); }
    visitSchema(schema) { return this.visitFields(schema.fields).reduce(extension_bytewidth_sum, 0); }
}
/** @ignore */
const extension_bytewidth_instance = new extension_ByteWidthVisitor();

//# sourceMappingURL=bytewidth.mjs.map

;// ../../node_modules/apache-arrow/visitor/vectorctor.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.



















/** @ignore */
class extension_GetVectorConstructor extends extension_Visitor {
    visitNull() { return extension_NullVector; }
    visitBool() { return extension_BoolVector; }
    visitInt() { return extension_IntVector; }
    visitInt8() { return extension_Int8Vector; }
    visitInt16() { return extension_Int16Vector; }
    visitInt32() { return extension_Int32Vector; }
    visitInt64() { return extension_Int64Vector; }
    visitUint8() { return extension_Uint8Vector; }
    visitUint16() { return extension_Uint16Vector; }
    visitUint32() { return extension_Uint32Vector; }
    visitUint64() { return extension_Uint64Vector; }
    visitFloat() { return extension_FloatVector; }
    visitFloat16() { return extension_Float16Vector; }
    visitFloat32() { return extension_Float32Vector; }
    visitFloat64() { return extension_Float64Vector; }
    visitUtf8() { return extension_Utf8Vector; }
    visitBinary() { return extension_BinaryVector; }
    visitFixedSizeBinary() { return extension_FixedSizeBinaryVector; }
    visitDate() { return extension_DateVector; }
    visitDateDay() { return extension_DateDayVector; }
    visitDateMillisecond() { return extension_DateMillisecondVector; }
    visitTimestamp() { return extension_TimestampVector; }
    visitTimestampSecond() { return extension_TimestampSecondVector; }
    visitTimestampMillisecond() { return extension_TimestampMillisecondVector; }
    visitTimestampMicrosecond() { return extension_TimestampMicrosecondVector; }
    visitTimestampNanosecond() { return extension_TimestampNanosecondVector; }
    visitTime() { return extension_TimeVector; }
    visitTimeSecond() { return extension_TimeSecondVector; }
    visitTimeMillisecond() { return extension_TimeMillisecondVector; }
    visitTimeMicrosecond() { return extension_TimeMicrosecondVector; }
    visitTimeNanosecond() { return extension_TimeNanosecondVector; }
    visitDecimal() { return extension_DecimalVector; }
    visitList() { return extension_ListVector; }
    visitStruct() { return extension_StructVector; }
    visitUnion() { return extension_UnionVector; }
    visitDenseUnion() { return extension_DenseUnionVector; }
    visitSparseUnion() { return extension_SparseUnionVector; }
    visitDictionary() { return extension_DictionaryVector; }
    visitInterval() { return extension_IntervalVector; }
    visitIntervalDayTime() { return extension_IntervalDayTimeVector; }
    visitIntervalYearMonth() { return extension_IntervalYearMonthVector; }
    visitFixedSizeList() { return extension_FixedSizeListVector; }
    visitMap() { return extension_MapVector; }
}
/** @ignore */
const extension_vectorctor_instance = new extension_GetVectorConstructor();

//# sourceMappingURL=vectorctor.mjs.map

;// ../../node_modules/apache-arrow/vector/index.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.





































/** @nocollapse */
extension_AbstractVector.new = extension_newVector;
/** @nocollapse */
extension_AbstractVector.from = extension_vectorFrom;
/** @ignore */
function extension_newVector(data, ...args) {
    return new (extension_vectorctor_instance.getVisitFn(data)())(data, ...args);
}
/** @ignore */
function extension_vectorFromValuesWithType(newDataType, input) {
    if (extension_isIterable(input)) {
        return extension_AbstractVector.from({ 'nullValues': [null, undefined], type: newDataType(), 'values': input });
    }
    else if (extension_isAsyncIterable(input)) {
        return extension_AbstractVector.from({ 'nullValues': [null, undefined], type: newDataType(), 'values': input });
    }
    const { 'values': values = [], 'type': type = newDataType(), 'nullValues': nullValues = [null, undefined], } = { ...input };
    return extension_isIterable(values)
        ? extension_AbstractVector.from({ nullValues, ...input, type })
        : extension_AbstractVector.from({ nullValues, ...input, type });
}
function extension_vectorFrom(input) {
    const { 'values': values = [], ...options } = { 'nullValues': [null, undefined], ...input };
    if (extension_isIterable(values)) {
        const chunks = [...extension_Builder.throughIterable(options)(values)];
        return (chunks.length === 1 ? chunks[0] : extension_Chunked.concat(chunks));
    }
    return (async (chunks) => {
        const transform = extension_Builder.throughAsyncIterable(options);
        for await (const chunk of transform(values)) {
            chunks.push(chunk);
        }
        return (chunks.length === 1 ? chunks[0] : extension_Chunked.concat(chunks));
    })([]);
}
//
// We provide the following method implementations for code navigability purposes only.
// They're overridden at runtime below with the specific Visitor implementation for each type,
// short-circuiting the usual Visitor traversal and reducing intermediate lookups and calls.
// This comment is here to remind you to not set breakpoints in these function bodies, or to inform
// you why the breakpoints you have already set are not being triggered. Have a great day!
//
extension_BaseVector.prototype.get = function baseVectorGet(index) {
    return extension_get_instance.visit(this, index);
};
extension_BaseVector.prototype.set = function baseVectorSet(index, value) {
    return extension_set_instance.visit(this, index, value);
};
extension_BaseVector.prototype.indexOf = function baseVectorIndexOf(value, fromIndex) {
    return extension_indexof_instance.visit(this, value, fromIndex);
};
extension_BaseVector.prototype.toArray = function baseVectorToArray() {
    return extension_toarray_instance.visit(this);
};
extension_BaseVector.prototype.getByteWidth = function baseVectorGetByteWidth() {
    return extension_bytewidth_instance.visit(this.type);
};
extension_BaseVector.prototype[Symbol.iterator] = function baseVectorSymbolIterator() {
    return extension_iterator_instance.visit(this);
};
extension_BaseVector.prototype._bindDataAccessors = extension_bindBaseVectorDataAccessors;
// Perf: bind and assign the operator Visitor methods to each of the Vector subclasses for each Type
Object.keys(extension_Type)
    .map((T) => extension_Type[T])
    .filter((T) => typeof T === 'number')
    .filter((typeId) => typeId !== extension_Type.NONE)
    .forEach((typeId) => {
    const VectorCtor = extension_vectorctor_instance.visit(typeId);
    VectorCtor.prototype['get'] = extension_partial1(extension_get_instance.getVisitFn(typeId));
    VectorCtor.prototype['set'] = extension_partial2(extension_set_instance.getVisitFn(typeId));
    VectorCtor.prototype['indexOf'] = extension_partial2(extension_indexof_instance.getVisitFn(typeId));
    VectorCtor.prototype['toArray'] = extension_partial0(extension_toarray_instance.getVisitFn(typeId));
    VectorCtor.prototype['getByteWidth'] = extension_partialType0(extension_bytewidth_instance.getVisitFn(typeId));
    VectorCtor.prototype[Symbol.iterator] = extension_partial0(extension_iterator_instance.getVisitFn(typeId));
});
/** @ignore */
function extension_partialType0(visit) {
    return function () { return visit(this.type); };
}
/** @ignore */
function extension_wrapNullableGet(fn) {
    return function (i) { return this.isValid(i) ? fn.call(this, i) : null; };
}
/** @ignore */
function extension_wrapNullableSet(fn) {
    return function (i, a) {
        if (extension_setBool(this.nullBitmap, this.offset + i, !(a === null || a === undefined))) {
            fn.call(this, i, a);
        }
    };
}
/** @ignore */
function extension_bindBaseVectorDataAccessors() {
    const nullBitmap = this.nullBitmap;
    if (nullBitmap && nullBitmap.byteLength > 0) {
        this.get = extension_wrapNullableGet(this.get);
        this.set = extension_wrapNullableSet(this.set);
    }
}

//# sourceMappingURL=index.mjs.map

;// ../../node_modules/apache-arrow/table.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.










class extension_table_Table extends extension_Chunked {
    constructor(...args) {
        let schema = null;
        if (args[0] instanceof extension_Schema) {
            schema = args.shift();
        }
        let chunks = extension_selectArgs(extension_recordbatch_RecordBatch, args);
        if (!schema && !(schema = chunks[0] && chunks[0].schema)) {
            throw new TypeError('Table must be initialized with a Schema or at least one RecordBatch');
        }
        chunks[0] || (chunks[0] = new extension_InternalEmptyPlaceholderRecordBatch(schema));
        super(new extension_Struct(schema.fields), chunks);
        this._schema = schema;
        this._chunks = chunks;
    }
    /** @nocollapse */
    static empty(schema = new extension_Schema([])) { return new extension_table_Table(schema, []); }
    /** @nocollapse */
    static from(input) {
        if (!input) {
            return extension_table_Table.empty();
        }
        if (typeof input === 'object') {
            let table = extension_isIterable(input['values']) ? extension_tableFromIterable(input)
                : extension_isAsyncIterable(input['values']) ? extension_tableFromAsyncIterable(input)
                    : null;
            if (table !== null) {
                return table;
            }
        }
        let reader = extension_RecordBatchReader.from(input);
        if (extension_isPromise(reader)) {
            return (async () => await extension_table_Table.from(await reader))();
        }
        if (reader.isSync() && (reader = reader.open())) {
            return !reader.schema ? extension_table_Table.empty() : new extension_table_Table(reader.schema, [...reader]);
        }
        return (async (opening) => {
            const reader = await opening;
            const schema = reader.schema;
            const batches = [];
            if (schema) {
                for await (let batch of reader) {
                    batches.push(batch);
                }
                return new extension_table_Table(schema, batches);
            }
            return extension_table_Table.empty();
        })(reader.open());
    }
    /** @nocollapse */
    static async fromAsync(source) {
        return await extension_table_Table.from(source);
    }
    /** @nocollapse */
    static fromStruct(vector) {
        return extension_table_Table.new(vector.data.childData, vector.type.children);
    }
    /** @nocollapse */
    static new(...cols) {
        return new extension_table_Table(...extension_distributeColumnsIntoRecordBatches(extension_selectColumnArgs(cols)));
    }
    get schema() { return this._schema; }
    get length() { return this._length; }
    get chunks() { return this._chunks; }
    get numCols() { return this._numChildren; }
    clone(chunks = this._chunks) {
        return new extension_table_Table(this._schema, chunks);
    }
    getColumn(name) {
        return this.getColumnAt(this.getColumnIndex(name));
    }
    getColumnAt(index) {
        return this.getChildAt(index);
    }
    getColumnIndex(name) {
        return this._schema.fields.findIndex((f) => f.name === name);
    }
    getChildAt(index) {
        if (index < 0 || index >= this.numChildren) {
            return null;
        }
        let field, child;
        const fields = this._schema.fields;
        const columns = this._children || (this._children = []);
        if (child = columns[index]) {
            return child;
        }
        if (field = fields[index]) {
            const chunks = this._chunks
                .map((chunk) => chunk.getChildAt(index))
                .filter((vec) => vec != null);
            if (chunks.length > 0) {
                return (columns[index] = new extension_column_Column(field, chunks));
            }
        }
        return null;
    }
    // @ts-ignore
    serialize(encoding = 'binary', stream = true) {
        const Writer = !stream
            ? extension_RecordBatchFileWriter
            : extension_RecordBatchStreamWriter;
        return Writer.writeAll(this).toUint8Array(true);
    }
    count() {
        return this._length;
    }
    select(...columnNames) {
        const nameToIndex = this._schema.fields.reduce((m, f, i) => m.set(f.name, i), new Map());
        return this.selectAt(...columnNames.map((columnName) => nameToIndex.get(columnName)).filter((x) => x > -1));
    }
    selectAt(...columnIndices) {
        const schema = this._schema.selectAt(...columnIndices);
        return new extension_table_Table(schema, this._chunks.map(({ length, data: { childData } }) => {
            return new extension_recordbatch_RecordBatch(schema, length, columnIndices.map((i) => childData[i]).filter(Boolean));
        }));
    }
    assign(other) {
        const fields = this._schema.fields;
        const [indices, oldToNew] = other.schema.fields.reduce((memo, f2, newIdx) => {
            const [indices, oldToNew] = memo;
            const i = fields.findIndex((f) => f.name === f2.name);
            ~i ? (oldToNew[i] = newIdx) : indices.push(newIdx);
            return memo;
        }, [[], []]);
        const schema = this._schema.assign(other.schema);
        const columns = [
            ...fields.map((_f, i, _fs, j = oldToNew[i]) => (j === undefined ? this.getColumnAt(i) : other.getColumnAt(j))),
            ...indices.map((i) => other.getColumnAt(i))
        ].filter(Boolean);
        return new extension_table_Table(...extension_distributeVectorsIntoRecordBatches(schema, columns));
    }
}
function extension_tableFromIterable(input) {
    const { type } = input;
    if (type instanceof extension_Struct) {
        return extension_table_Table.fromStruct(extension_StructVector.from(input));
    }
    return null;
}
function extension_tableFromAsyncIterable(input) {
    const { type } = input;
    if (type instanceof extension_Struct) {
        return extension_StructVector.from(input).then((vector) => extension_table_Table.fromStruct(vector));
    }
    return null;
}

//# sourceMappingURL=table.mjs.map

;// ../../node_modules/apache-arrow/recordbatch.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.











class extension_recordbatch_RecordBatch extends extension_StructVector {
    constructor(...args) {
        let data;
        let schema = args[0];
        let children;
        if (args[1] instanceof extension_Data) {
            [, data, children] = args;
        }
        else {
            const fields = schema.fields;
            const [, length, childData] = args;
            data = extension_Data.Struct(new extension_Struct(fields), 0, length, 0, null, childData);
        }
        super(data, children);
        this._schema = schema;
    }
    /** @nocollapse */
    static from(options) {
        if (extension_isIterable(options['values'])) {
            return extension_table_Table.from(options);
        }
        return extension_table_Table.from(options);
    }
    /** @nocollapse */
    static new(...args) {
        const [fs, xs] = extension_selectFieldArgs(args);
        const vs = xs.filter((x) => x instanceof extension_AbstractVector);
        return new extension_recordbatch_RecordBatch(...extension_ensureSameLengthData(new extension_Schema(fs), vs.map((x) => x.data)));
    }
    clone(data, children = this._children) {
        return new extension_recordbatch_RecordBatch(this._schema, data, children);
    }
    concat(...others) {
        const schema = this._schema, chunks = extension_Chunked.flatten(this, ...others);
        return new extension_table_Table(schema, chunks.map(({ data }) => new extension_recordbatch_RecordBatch(schema, data)));
    }
    get schema() { return this._schema; }
    get numCols() { return this._schema.fields.length; }
    get dictionaries() {
        return this._dictionaries || (this._dictionaries = extension_DictionaryCollector.collect(this));
    }
    select(...columnNames) {
        const nameToIndex = this._schema.fields.reduce((m, f, i) => m.set(f.name, i), new Map());
        return this.selectAt(...columnNames.map((columnName) => nameToIndex.get(columnName)).filter((x) => x > -1));
    }
    selectAt(...columnIndices) {
        const schema = this._schema.selectAt(...columnIndices);
        const childData = columnIndices.map((i) => this.data.childData[i]).filter(Boolean);
        return new extension_recordbatch_RecordBatch(schema, this.length, childData);
    }
}
/**
 * An internal class used by the `RecordBatchReader` and `RecordBatchWriter`
 * implementations to differentiate between a stream with valid zero-length
 * RecordBatches, and a stream with a Schema message, but no RecordBatches.
 * @see https://github.com/apache/arrow/pull/4373
 * @ignore
 * @private
 */
/* tslint:disable:class-name */
class extension_InternalEmptyPlaceholderRecordBatch extends extension_recordbatch_RecordBatch {
    constructor(schema) {
        super(schema, 0, schema.fields.map((f) => extension_Data.new(f.type, 0, 0, 0)));
    }
}
/** @ignore */
class extension_DictionaryCollector extends extension_Visitor {
    constructor() {
        super(...arguments);
        this.dictionaries = new Map();
    }
    static collect(batch) {
        return new extension_DictionaryCollector().visit(batch.data, new extension_Struct(batch.schema.fields)).dictionaries;
    }
    visit(data, type) {
        if (extension_DataType.isDictionary(type)) {
            return this.visitDictionary(data, type);
        }
        else {
            data.childData.forEach((child, i) => this.visit(child, type.children[i].type));
        }
        return this;
    }
    visitDictionary(data, type) {
        const dictionary = data.dictionary;
        if (dictionary && dictionary.length > 0) {
            this.dictionaries.set(type.id, dictionary);
        }
        return this;
    }
}

//# sourceMappingURL=recordbatch.mjs.map

;// ../../node_modules/apache-arrow/ipc/reader.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.











class extension_RecordBatchReader extends extension_ReadableInterop {
    constructor(impl) {
        super();
        this._impl = impl;
    }
    get closed() { return this._impl.closed; }
    get schema() { return this._impl.schema; }
    get autoDestroy() { return this._impl.autoDestroy; }
    get dictionaries() { return this._impl.dictionaries; }
    get numDictionaries() { return this._impl.numDictionaries; }
    get numRecordBatches() { return this._impl.numRecordBatches; }
    get footer() { return this._impl.isFile() ? this._impl.footer : null; }
    isSync() { return this._impl.isSync(); }
    isAsync() { return this._impl.isAsync(); }
    isFile() { return this._impl.isFile(); }
    isStream() { return this._impl.isStream(); }
    next() {
        return this._impl.next();
    }
    throw(value) {
        return this._impl.throw(value);
    }
    return(value) {
        return this._impl.return(value);
    }
    cancel() {
        return this._impl.cancel();
    }
    reset(schema) {
        this._impl.reset(schema);
        this._DOMStream = undefined;
        this._nodeStream = undefined;
        return this;
    }
    open(options) {
        const opening = this._impl.open(options);
        return extension_isPromise(opening) ? opening.then(() => this) : this;
    }
    readRecordBatch(index) {
        return this._impl.isFile() ? this._impl.readRecordBatch(index) : null;
    }
    [Symbol.iterator]() {
        return this._impl[Symbol.iterator]();
    }
    [Symbol.asyncIterator]() {
        return this._impl[Symbol.asyncIterator]();
    }
    toDOMStream() {
        return extension_adapters.toDOMStream((this.isSync()
            ? { [Symbol.iterator]: () => this }
            : { [Symbol.asyncIterator]: () => this }));
    }
    toNodeStream() {
        return extension_adapters.toNodeStream((this.isSync()
            ? { [Symbol.iterator]: () => this }
            : { [Symbol.asyncIterator]: () => this }), { objectMode: true });
    }
    /** @nocollapse */
    // @ts-ignore
    static throughNode(options) {
        throw new Error(`"throughNode" not available in this environment`);
    }
    /** @nocollapse */
    static throughDOM(
    // @ts-ignore
    writableStrategy, 
    // @ts-ignore
    readableStrategy) {
        throw new Error(`"throughDOM" not available in this environment`);
    }
    /** @nocollapse */
    static from(source) {
        if (source instanceof extension_RecordBatchReader) {
            return source;
        }
        else if (extension_isArrowJSON(source)) {
            return extension_fromArrowJSON(source);
        }
        else if (extension_isFileHandle(source)) {
            return extension_fromFileHandle(source);
        }
        else if (extension_isPromise(source)) {
            return (async () => await extension_RecordBatchReader.from(await source))();
        }
        else if (extension_isFetchResponse(source) || extension_isReadableDOMStream(source) || extension_isReadableNodeStream(source) || extension_isAsyncIterable(source)) {
            return extension_fromAsyncByteStream(new extension_AsyncByteStream(source));
        }
        return extension_fromByteStream(new extension_ByteStream(source));
    }
    /** @nocollapse */
    static readAll(source) {
        if (source instanceof extension_RecordBatchReader) {
            return source.isSync() ? extension_readAllSync(source) : extension_readAllAsync(source);
        }
        else if (extension_isArrowJSON(source) || ArrayBuffer.isView(source) || extension_isIterable(source) || extension_isIteratorResult(source)) {
            return extension_readAllSync(source);
        }
        return extension_readAllAsync(source);
    }
}
//
// Since TS is a structural type system, we define the following subclass stubs
// so that concrete types exist to associate with with the interfaces below.
//
// The implementation for each RecordBatchReader is hidden away in the set of
// `RecordBatchReaderImpl` classes in the second half of this file. This allows
// us to export a single RecordBatchReader class, and swap out the impl based
// on the io primitives or underlying arrow (JSON, file, or stream) at runtime.
//
// Async/await makes our job a bit harder, since it forces everything to be
// either fully sync or fully async. This is why the logic for the reader impls
// has been duplicated into both sync and async variants. Since the RBR
// delegates to its impl, an RBR with an AsyncRecordBatchFileReaderImpl for
// example will return async/await-friendly Promises, but one with a (sync)
// RecordBatchStreamReaderImpl will always return values. Nothing should be
// different about their logic, aside from the async handling. This is also why
// this code looks highly structured, as it should be nearly identical and easy
// to follow.
//
/** @ignore */
class extension_RecordBatchStreamReader extends extension_RecordBatchReader {
    constructor(_impl) {
        super(_impl);
        this._impl = _impl;
    }
    [Symbol.iterator]() { return this._impl[Symbol.iterator](); }
    async *[Symbol.asyncIterator]() { yield* this[Symbol.iterator](); }
}
/** @ignore */
class extension_AsyncRecordBatchStreamReader extends extension_RecordBatchReader {
    constructor(_impl) {
        super(_impl);
        this._impl = _impl;
    }
    [Symbol.iterator]() { throw new Error(`AsyncRecordBatchStreamReader is not Iterable`); }
    [Symbol.asyncIterator]() { return this._impl[Symbol.asyncIterator](); }
}
/** @ignore */
class extension_RecordBatchFileReader extends extension_RecordBatchStreamReader {
    constructor(_impl) {
        super(_impl);
        this._impl = _impl;
    }
}
/** @ignore */
class extension_AsyncRecordBatchFileReader extends extension_AsyncRecordBatchStreamReader {
    constructor(_impl) {
        super(_impl);
        this._impl = _impl;
    }
}
/** @ignore */
class extension_RecordBatchReaderImpl {
    constructor(dictionaries = new Map()) {
        this.closed = false;
        this.autoDestroy = true;
        this._dictionaryIndex = 0;
        this._recordBatchIndex = 0;
        this.dictionaries = dictionaries;
    }
    get numDictionaries() { return this._dictionaryIndex; }
    get numRecordBatches() { return this._recordBatchIndex; }
    isSync() { return false; }
    isAsync() { return false; }
    isFile() { return false; }
    isStream() { return false; }
    reset(schema) {
        this._dictionaryIndex = 0;
        this._recordBatchIndex = 0;
        this.schema = schema;
        this.dictionaries = new Map();
        return this;
    }
    _loadRecordBatch(header, body) {
        return new extension_recordbatch_RecordBatch(this.schema, header.length, this._loadVectors(header, body, this.schema.fields));
    }
    _loadDictionaryBatch(header, body) {
        const { id, isDelta, data } = header;
        const { dictionaries, schema } = this;
        const dictionary = dictionaries.get(id);
        if (isDelta || !dictionary) {
            const type = schema.dictionaries.get(id);
            return (dictionary && isDelta ? dictionary.concat(extension_AbstractVector.new(this._loadVectors(data, body, [type])[0])) :
                extension_AbstractVector.new(this._loadVectors(data, body, [type])[0]));
        }
        return dictionary;
    }
    _loadVectors(header, body, types) {
        return new extension_VectorLoader(body, header.nodes, header.buffers, this.dictionaries).visitMany(types);
    }
}
/** @ignore */
class extension_RecordBatchStreamReaderImpl extends extension_RecordBatchReaderImpl {
    constructor(source, dictionaries) {
        super(dictionaries);
        this._reader = !extension_isArrowJSON(source)
            ? new extension_MessageReader(this._handle = source)
            : new extension_JSONMessageReader(this._handle = source);
    }
    isSync() { return true; }
    isStream() { return true; }
    [Symbol.iterator]() {
        return this;
    }
    cancel() {
        if (!this.closed && (this.closed = true)) {
            this.reset()._reader.return();
            this._reader = null;
            this.dictionaries = null;
        }
    }
    open(options) {
        if (!this.closed) {
            this.autoDestroy = extension_shouldAutoDestroy(this, options);
            if (!(this.schema || (this.schema = this._reader.readSchema()))) {
                this.cancel();
            }
        }
        return this;
    }
    throw(value) {
        if (!this.closed && this.autoDestroy && (this.closed = true)) {
            return this.reset()._reader.throw(value);
        }
        return extension_ITERATOR_DONE;
    }
    return(value) {
        if (!this.closed && this.autoDestroy && (this.closed = true)) {
            return this.reset()._reader.return(value);
        }
        return extension_ITERATOR_DONE;
    }
    next() {
        if (this.closed) {
            return extension_ITERATOR_DONE;
        }
        let message, { _reader: reader } = this;
        while (message = this._readNextMessageAndValidate()) {
            if (message.isSchema()) {
                this.reset(message.header());
            }
            else if (message.isRecordBatch()) {
                this._recordBatchIndex++;
                const header = message.header();
                const buffer = reader.readMessageBody(message.bodyLength);
                const recordBatch = this._loadRecordBatch(header, buffer);
                return { done: false, value: recordBatch };
            }
            else if (message.isDictionaryBatch()) {
                this._dictionaryIndex++;
                const header = message.header();
                const buffer = reader.readMessageBody(message.bodyLength);
                const vector = this._loadDictionaryBatch(header, buffer);
                this.dictionaries.set(header.id, vector);
            }
        }
        if (this.schema && this._recordBatchIndex === 0) {
            this._recordBatchIndex++;
            return { done: false, value: new extension_InternalEmptyPlaceholderRecordBatch(this.schema) };
        }
        return this.return();
    }
    _readNextMessageAndValidate(type) {
        return this._reader.readMessage(type);
    }
}
/** @ignore */
class extension_AsyncRecordBatchStreamReaderImpl extends extension_RecordBatchReaderImpl {
    constructor(source, dictionaries) {
        super(dictionaries);
        this._reader = new extension_AsyncMessageReader(this._handle = source);
    }
    isAsync() { return true; }
    isStream() { return true; }
    [Symbol.asyncIterator]() {
        return this;
    }
    async cancel() {
        if (!this.closed && (this.closed = true)) {
            await this.reset()._reader.return();
            this._reader = null;
            this.dictionaries = null;
        }
    }
    async open(options) {
        if (!this.closed) {
            this.autoDestroy = extension_shouldAutoDestroy(this, options);
            if (!(this.schema || (this.schema = (await this._reader.readSchema())))) {
                await this.cancel();
            }
        }
        return this;
    }
    async throw(value) {
        if (!this.closed && this.autoDestroy && (this.closed = true)) {
            return await this.reset()._reader.throw(value);
        }
        return extension_ITERATOR_DONE;
    }
    async return(value) {
        if (!this.closed && this.autoDestroy && (this.closed = true)) {
            return await this.reset()._reader.return(value);
        }
        return extension_ITERATOR_DONE;
    }
    async next() {
        if (this.closed) {
            return extension_ITERATOR_DONE;
        }
        let message, { _reader: reader } = this;
        while (message = await this._readNextMessageAndValidate()) {
            if (message.isSchema()) {
                await this.reset(message.header());
            }
            else if (message.isRecordBatch()) {
                this._recordBatchIndex++;
                const header = message.header();
                const buffer = await reader.readMessageBody(message.bodyLength);
                const recordBatch = this._loadRecordBatch(header, buffer);
                return { done: false, value: recordBatch };
            }
            else if (message.isDictionaryBatch()) {
                this._dictionaryIndex++;
                const header = message.header();
                const buffer = await reader.readMessageBody(message.bodyLength);
                const vector = this._loadDictionaryBatch(header, buffer);
                this.dictionaries.set(header.id, vector);
            }
        }
        if (this.schema && this._recordBatchIndex === 0) {
            this._recordBatchIndex++;
            return { done: false, value: new extension_InternalEmptyPlaceholderRecordBatch(this.schema) };
        }
        return await this.return();
    }
    async _readNextMessageAndValidate(type) {
        return await this._reader.readMessage(type);
    }
}
/** @ignore */
class extension_RecordBatchFileReaderImpl extends extension_RecordBatchStreamReaderImpl {
    constructor(source, dictionaries) {
        super(source instanceof extension_RandomAccessFile ? source : new extension_RandomAccessFile(source), dictionaries);
    }
    get footer() { return this._footer; }
    get numDictionaries() { return this._footer ? this._footer.numDictionaries : 0; }
    get numRecordBatches() { return this._footer ? this._footer.numRecordBatches : 0; }
    isSync() { return true; }
    isFile() { return true; }
    open(options) {
        if (!this.closed && !this._footer) {
            this.schema = (this._footer = this._readFooter()).schema;
            for (const block of this._footer.dictionaryBatches()) {
                block && this._readDictionaryBatch(this._dictionaryIndex++);
            }
        }
        return super.open(options);
    }
    readRecordBatch(index) {
        if (this.closed) {
            return null;
        }
        if (!this._footer) {
            this.open();
        }
        const block = this._footer && this._footer.getRecordBatch(index);
        if (block && this._handle.seek(block.offset)) {
            const message = this._reader.readMessage(extension_MessageHeader.RecordBatch);
            if (message && message.isRecordBatch()) {
                const header = message.header();
                const buffer = this._reader.readMessageBody(message.bodyLength);
                const recordBatch = this._loadRecordBatch(header, buffer);
                return recordBatch;
            }
        }
        return null;
    }
    _readDictionaryBatch(index) {
        const block = this._footer && this._footer.getDictionaryBatch(index);
        if (block && this._handle.seek(block.offset)) {
            const message = this._reader.readMessage(extension_MessageHeader.DictionaryBatch);
            if (message && message.isDictionaryBatch()) {
                const header = message.header();
                const buffer = this._reader.readMessageBody(message.bodyLength);
                const vector = this._loadDictionaryBatch(header, buffer);
                this.dictionaries.set(header.id, vector);
            }
        }
    }
    _readFooter() {
        const { _handle } = this;
        const offset = _handle.size - extension_magicAndPadding;
        const length = _handle.readInt32(offset);
        const buffer = _handle.readAt(offset - length, length);
        return extension_Footer_.decode(buffer);
    }
    _readNextMessageAndValidate(type) {
        if (!this._footer) {
            this.open();
        }
        if (this._footer && this._recordBatchIndex < this.numRecordBatches) {
            const block = this._footer && this._footer.getRecordBatch(this._recordBatchIndex);
            if (block && this._handle.seek(block.offset)) {
                return this._reader.readMessage(type);
            }
        }
        return null;
    }
}
/** @ignore */
class extension_AsyncRecordBatchFileReaderImpl extends extension_AsyncRecordBatchStreamReaderImpl {
    constructor(source, ...rest) {
        const byteLength = typeof rest[0] !== 'number' ? rest.shift() : undefined;
        const dictionaries = rest[0] instanceof Map ? rest.shift() : undefined;
        super(source instanceof extension_AsyncRandomAccessFile ? source : new extension_AsyncRandomAccessFile(source, byteLength), dictionaries);
    }
    get footer() { return this._footer; }
    get numDictionaries() { return this._footer ? this._footer.numDictionaries : 0; }
    get numRecordBatches() { return this._footer ? this._footer.numRecordBatches : 0; }
    isFile() { return true; }
    isAsync() { return true; }
    async open(options) {
        if (!this.closed && !this._footer) {
            this.schema = (this._footer = await this._readFooter()).schema;
            for (const block of this._footer.dictionaryBatches()) {
                block && await this._readDictionaryBatch(this._dictionaryIndex++);
            }
        }
        return await super.open(options);
    }
    async readRecordBatch(index) {
        if (this.closed) {
            return null;
        }
        if (!this._footer) {
            await this.open();
        }
        const block = this._footer && this._footer.getRecordBatch(index);
        if (block && (await this._handle.seek(block.offset))) {
            const message = await this._reader.readMessage(extension_MessageHeader.RecordBatch);
            if (message && message.isRecordBatch()) {
                const header = message.header();
                const buffer = await this._reader.readMessageBody(message.bodyLength);
                const recordBatch = this._loadRecordBatch(header, buffer);
                return recordBatch;
            }
        }
        return null;
    }
    async _readDictionaryBatch(index) {
        const block = this._footer && this._footer.getDictionaryBatch(index);
        if (block && (await this._handle.seek(block.offset))) {
            const message = await this._reader.readMessage(extension_MessageHeader.DictionaryBatch);
            if (message && message.isDictionaryBatch()) {
                const header = message.header();
                const buffer = await this._reader.readMessageBody(message.bodyLength);
                const vector = this._loadDictionaryBatch(header, buffer);
                this.dictionaries.set(header.id, vector);
            }
        }
    }
    async _readFooter() {
        const { _handle } = this;
        _handle._pending && await _handle._pending;
        const offset = _handle.size - extension_magicAndPadding;
        const length = await _handle.readInt32(offset);
        const buffer = await _handle.readAt(offset - length, length);
        return extension_Footer_.decode(buffer);
    }
    async _readNextMessageAndValidate(type) {
        if (!this._footer) {
            await this.open();
        }
        if (this._footer && this._recordBatchIndex < this.numRecordBatches) {
            const block = this._footer.getRecordBatch(this._recordBatchIndex);
            if (block && await this._handle.seek(block.offset)) {
                return await this._reader.readMessage(type);
            }
        }
        return null;
    }
}
/** @ignore */
class extension_RecordBatchJSONReaderImpl extends extension_RecordBatchStreamReaderImpl {
    constructor(source, dictionaries) {
        super(source, dictionaries);
    }
    _loadVectors(header, body, types) {
        return new extension_JSONVectorLoader(body, header.nodes, header.buffers, this.dictionaries).visitMany(types);
    }
}
//
// Define some helper functions and static implementations down here. There's
// a bit of branching in the static methods that can lead to the same routines
// being executed, so we've broken those out here for readability.
//
/** @ignore */
function extension_shouldAutoDestroy(self, options) {
    return options && (typeof options['autoDestroy'] === 'boolean') ? options['autoDestroy'] : self['autoDestroy'];
}
/** @ignore */
function* extension_readAllSync(source) {
    const reader = extension_RecordBatchReader.from(source);
    try {
        if (!reader.open({ autoDestroy: false }).closed) {
            do {
                yield reader;
            } while (!(reader.reset().open()).closed);
        }
    }
    finally {
        reader.cancel();
    }
}
/** @ignore */
async function* extension_readAllAsync(source) {
    const reader = await extension_RecordBatchReader.from(source);
    try {
        if (!(await reader.open({ autoDestroy: false })).closed) {
            do {
                yield reader;
            } while (!(await reader.reset().open()).closed);
        }
    }
    finally {
        await reader.cancel();
    }
}
/** @ignore */
function extension_fromArrowJSON(source) {
    return new extension_RecordBatchStreamReader(new extension_RecordBatchJSONReaderImpl(source));
}
/** @ignore */
function extension_fromByteStream(source) {
    const bytes = source.peek((extension_magicLength + 7) & ~7);
    return bytes && bytes.byteLength >= 4 ? !extension_checkForMagicArrowString(bytes)
        ? new extension_RecordBatchStreamReader(new extension_RecordBatchStreamReaderImpl(source))
        : new extension_RecordBatchFileReader(new extension_RecordBatchFileReaderImpl(source.read()))
        : new extension_RecordBatchStreamReader(new extension_RecordBatchStreamReaderImpl(function* () { }()));
}
/** @ignore */
async function extension_fromAsyncByteStream(source) {
    const bytes = await source.peek((extension_magicLength + 7) & ~7);
    return bytes && bytes.byteLength >= 4 ? !extension_checkForMagicArrowString(bytes)
        ? new extension_AsyncRecordBatchStreamReader(new extension_AsyncRecordBatchStreamReaderImpl(source))
        : new extension_RecordBatchFileReader(new extension_RecordBatchFileReaderImpl(await source.read()))
        : new extension_AsyncRecordBatchStreamReader(new extension_AsyncRecordBatchStreamReaderImpl(async function* () { }()));
}
/** @ignore */
async function extension_fromFileHandle(source) {
    const { size } = await source.stat();
    const file = new extension_AsyncRandomAccessFile(source, size);
    if (size >= extension_magicX2AndPadding) {
        if (extension_checkForMagicArrowString(await file.readAt(0, (extension_magicLength + 7) & ~7))) {
            return new extension_AsyncRecordBatchFileReader(new extension_AsyncRecordBatchFileReaderImpl(file));
        }
    }
    return new extension_AsyncRecordBatchStreamReader(new extension_AsyncRecordBatchStreamReaderImpl(file));
}

//# sourceMappingURL=reader.mjs.map

;// ../../node_modules/apache-arrow/io/whatwg/iterable.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore */
function extension_toDOMStream(source, options) {
    if (extension_isAsyncIterable(source)) {
        return extension_asyncIterableAsReadableDOMStream(source, options);
    }
    if (extension_isIterable(source)) {
        return extension_iterableAsReadableDOMStream(source, options);
    }
    /* istanbul ignore next */
    throw new Error(`toDOMStream() must be called with an Iterable or AsyncIterable`);
}
/** @ignore */
function extension_iterableAsReadableDOMStream(source, options) {
    let it = null;
    const bm = (options && options.type === 'bytes') || false;
    const hwm = options && options.highWaterMark || (2 ** 24);
    return new ReadableStream({
        ...options,
        start(controller) { next(controller, it || (it = source[Symbol.iterator]())); },
        pull(controller) { it ? (next(controller, it)) : controller.close(); },
        cancel() { (it && (it.return && it.return()) || true) && (it = null); }
    }, { highWaterMark: bm ? hwm : undefined, ...options });
    function next(controller, it) {
        let buf;
        let r = null;
        let size = controller.desiredSize || null;
        while (!(r = it.next(bm ? size : null)).done) {
            if (ArrayBuffer.isView(r.value) && (buf = extension_toUint8Array(r.value))) {
                size != null && bm && (size = size - buf.byteLength + 1);
                r.value = buf;
            }
            controller.enqueue(r.value);
            if (size != null && --size <= 0) {
                return;
            }
        }
        controller.close();
    }
}
/** @ignore */
function extension_asyncIterableAsReadableDOMStream(source, options) {
    let it = null;
    const bm = (options && options.type === 'bytes') || false;
    const hwm = options && options.highWaterMark || (2 ** 24);
    return new ReadableStream({
        ...options,
        async start(controller) { await next(controller, it || (it = source[Symbol.asyncIterator]())); },
        async pull(controller) { it ? (await next(controller, it)) : controller.close(); },
        async cancel() { (it && (it.return && await it.return()) || true) && (it = null); },
    }, { highWaterMark: bm ? hwm : undefined, ...options });
    async function next(controller, it) {
        let buf;
        let r = null;
        let size = controller.desiredSize || null;
        while (!(r = await it.next(bm ? size : null)).done) {
            if (ArrayBuffer.isView(r.value) && (buf = extension_toUint8Array(r.value))) {
                size != null && bm && (size = size - buf.byteLength + 1);
                r.value = buf;
            }
            controller.enqueue(r.value);
            if (size != null && --size <= 0) {
                return;
            }
        }
        controller.close();
    }
}

//# sourceMappingURL=iterable.mjs.map

;// ../../node_modules/apache-arrow/io/whatwg/builder.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
function extension_builderThroughDOMStream(options) {
    return new extension_BuilderTransform(options);
}
/** @ignore */
class extension_BuilderTransform {
    constructor(options) {
        // Access properties by string indexers to defeat closure compiler
        this._numChunks = 0;
        this._finished = false;
        this._bufferedSize = 0;
        const { ['readableStrategy']: readableStrategy, ['writableStrategy']: writableStrategy, ['queueingStrategy']: queueingStrategy = 'count', ...builderOptions } = options;
        this._controller = null;
        this._builder = extension_Builder.new(builderOptions);
        this._getSize = queueingStrategy !== 'bytes' ? extension_chunkLength : extension_chunkByteLength;
        const { ['highWaterMark']: readableHighWaterMark = queueingStrategy === 'bytes' ? 2 ** 14 : 1000 } = { ...readableStrategy };
        const { ['highWaterMark']: writableHighWaterMark = queueingStrategy === 'bytes' ? 2 ** 14 : 1000 } = { ...writableStrategy };
        this['readable'] = new ReadableStream({
            ['cancel']: () => { this._builder.clear(); },
            ['pull']: (c) => { this._maybeFlush(this._builder, this._controller = c); },
            ['start']: (c) => { this._maybeFlush(this._builder, this._controller = c); },
        }, {
            'highWaterMark': readableHighWaterMark,
            'size': queueingStrategy !== 'bytes' ? extension_chunkLength : extension_chunkByteLength,
        });
        this['writable'] = new WritableStream({
            ['abort']: () => { this._builder.clear(); },
            ['write']: () => { this._maybeFlush(this._builder, this._controller); },
            ['close']: () => { this._maybeFlush(this._builder.finish(), this._controller); },
        }, {
            'highWaterMark': writableHighWaterMark,
            'size': (value) => this._writeValueAndReturnChunkSize(value),
        });
    }
    _writeValueAndReturnChunkSize(value) {
        const bufferedSize = this._bufferedSize;
        this._bufferedSize = this._getSize(this._builder.append(value));
        return this._bufferedSize - bufferedSize;
    }
    _maybeFlush(builder, controller) {
        if (controller === null) {
            return;
        }
        if (this._bufferedSize >= controller.desiredSize) {
            ++this._numChunks && this._enqueue(controller, builder.toVector());
        }
        if (builder.finished) {
            if (builder.length > 0 || this._numChunks === 0) {
                ++this._numChunks && this._enqueue(controller, builder.toVector());
            }
            if (!this._finished && (this._finished = true)) {
                this._enqueue(controller, null);
            }
        }
    }
    _enqueue(controller, chunk) {
        this._bufferedSize = 0;
        this._controller = null;
        chunk === null ? controller.close() : controller.enqueue(chunk);
    }
}
/** @ignore */ const extension_chunkLength = (chunk) => chunk.length;
/** @ignore */ const extension_chunkByteLength = (chunk) => chunk.byteLength;

//# sourceMappingURL=builder.mjs.map

;// ../../node_modules/apache-arrow/io/whatwg/reader.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.


/** @ignore */
function extension_recordBatchReaderThroughDOMStream(writableStrategy, readableStrategy) {
    const queue = new extension_AsyncByteQueue();
    let reader = null;
    const readable = new ReadableStream({
        async cancel() { await queue.close(); },
        async start(controller) { await next(controller, reader || (reader = await open())); },
        async pull(controller) { reader ? await next(controller, reader) : controller.close(); }
    });
    return { writable: new WritableStream(queue, { 'highWaterMark': 2 ** 14, ...writableStrategy }), readable };
    async function open() {
        return await (await extension_RecordBatchReader.from(queue)).open(readableStrategy);
    }
    async function next(controller, reader) {
        let size = controller.desiredSize;
        let r = null;
        while (!(r = await reader.next()).done) {
            controller.enqueue(r.value);
            if (size != null && --size <= 0) {
                return;
            }
        }
        controller.close();
    }
}

//# sourceMappingURL=reader.mjs.map

;// ../../node_modules/apache-arrow/io/whatwg/writer.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
function extension_recordBatchWriterThroughDOMStream(writableStrategy, readableStrategy) {
    const writer = new this(writableStrategy);
    const reader = new extension_AsyncByteStream(writer);
    const readable = new ReadableStream({
        type: 'bytes',
        async cancel() { await reader.cancel(); },
        async pull(controller) { await next(controller); },
        async start(controller) { await next(controller); },
    }, { 'highWaterMark': 2 ** 14, ...readableStrategy });
    return { writable: new WritableStream(writer, writableStrategy), readable };
    async function next(controller) {
        let buf = null;
        let size = controller.desiredSize;
        while (buf = await reader.read(size || null)) {
            controller.enqueue(buf);
            if (size != null && (size -= buf.byteLength) <= 0) {
                return;
            }
        }
        controller.close();
    }
}

//# sourceMappingURL=writer.mjs.map

;// ../../node_modules/apache-arrow/compute/predicate.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */
class extension_Value {
    eq(other) {
        if (!(other instanceof extension_Value)) {
            other = new extension_predicate_Literal(other);
        }
        return new extension_Equals(this, other);
    }
    le(other) {
        if (!(other instanceof extension_Value)) {
            other = new extension_predicate_Literal(other);
        }
        return new extension_LTeq(this, other);
    }
    ge(other) {
        if (!(other instanceof extension_Value)) {
            other = new extension_predicate_Literal(other);
        }
        return new extension_GTeq(this, other);
    }
    lt(other) {
        return new extension_Not(this.ge(other));
    }
    gt(other) {
        return new extension_Not(this.le(other));
    }
    ne(other) {
        return new extension_Not(this.eq(other));
    }
}
/** @ignore */
class extension_predicate_Literal extends extension_Value {
    constructor(v) {
        super();
        this.v = v;
    }
}
/** @ignore */
class extension_Col extends extension_Value {
    constructor(name) {
        super();
        this.name = name;
    }
    bind(batch) {
        if (!this.colidx) {
            // Assume column index doesn't change between calls to bind
            //this.colidx = cols.findIndex(v => v.name.indexOf(this.name) != -1);
            this.colidx = -1;
            const fields = batch.schema.fields;
            for (let idx = -1; ++idx < fields.length;) {
                if (fields[idx].name === this.name) {
                    this.colidx = idx;
                    break;
                }
            }
            if (this.colidx < 0) {
                throw new Error(`Failed to bind Col "${this.name}"`);
            }
        }
        const vec = this.vector = batch.getChildAt(this.colidx);
        return (idx) => vec.get(idx);
    }
}
/** @ignore */
class extension_Predicate {
    and(...expr) { return new extension_And(this, ...expr); }
    or(...expr) { return new extension_Or(this, ...expr); }
    not() { return new extension_Not(this); }
}
/** @ignore */
class extension_ComparisonPredicate extends extension_Predicate {
    constructor(left, right) {
        super();
        this.left = left;
        this.right = right;
    }
    bind(batch) {
        if (this.left instanceof extension_predicate_Literal) {
            if (this.right instanceof extension_predicate_Literal) {
                return this._bindLitLit(batch, this.left, this.right);
            }
            else { // right is a Col
                return this._bindLitCol(batch, this.left, this.right);
            }
        }
        else { // left is a Col
            if (this.right instanceof extension_predicate_Literal) {
                return this._bindColLit(batch, this.left, this.right);
            }
            else { // right is a Col
                return this._bindColCol(batch, this.left, this.right);
            }
        }
    }
}
/** @ignore */
class extension_CombinationPredicate extends extension_Predicate {
    constructor(...children) {
        super();
        this.children = children;
    }
}
// add children to prototype so it doesn't get mangled in es2015/umd
extension_CombinationPredicate.prototype.children = Object.freeze([]); // freeze for safety
/** @ignore */
class extension_And extends extension_CombinationPredicate {
    constructor(...children) {
        // Flatten any Ands
        children = children.reduce((accum, p) => {
            return accum.concat(p instanceof extension_And ? p.children : p);
        }, []);
        super(...children);
    }
    bind(batch) {
        const bound = this.children.map((p) => p.bind(batch));
        return (idx, batch) => bound.every((p) => p(idx, batch));
    }
}
/** @ignore */
class extension_Or extends extension_CombinationPredicate {
    constructor(...children) {
        // Flatten any Ors
        children = children.reduce((accum, p) => {
            return accum.concat(p instanceof extension_Or ? p.children : p);
        }, []);
        super(...children);
    }
    bind(batch) {
        const bound = this.children.map((p) => p.bind(batch));
        return (idx, batch) => bound.some((p) => p(idx, batch));
    }
}
/** @ignore */
class extension_Equals extends extension_ComparisonPredicate {
    _bindLitLit(_batch, left, right) {
        const rtrn = left.v == right.v;
        return () => rtrn;
    }
    _bindColCol(batch, left, right) {
        const left_func = left.bind(batch);
        const right_func = right.bind(batch);
        return (idx, batch) => left_func(idx, batch) == right_func(idx, batch);
    }
    _bindColLit(batch, col, lit) {
        const col_func = col.bind(batch);
        if (col.vector instanceof extension_DictionaryVector) {
            let key;
            const vector = col.vector;
            if (vector.dictionary !== this.lastDictionary) {
                key = vector.reverseLookup(lit.v);
                this.lastDictionary = vector.dictionary;
                this.lastKey = key;
            }
            else {
                key = this.lastKey;
            }
            if (key === -1) {
                // the value doesn't exist in the dictionary - always return
                // false
                // TODO: special-case of PredicateFunc that encapsulates this
                // "always false" behavior. That way filtering operations don't
                // have to bother checking
                return () => false;
            }
            else {
                return (idx) => {
                    return vector.getKey(idx) === key;
                };
            }
        }
        else {
            return (idx, cols) => col_func(idx, cols) == lit.v;
        }
    }
    _bindLitCol(batch, lit, col) {
        // Equals is commutative
        return this._bindColLit(batch, col, lit);
    }
}
/** @ignore */
class extension_LTeq extends extension_ComparisonPredicate {
    _bindLitLit(_batch, left, right) {
        const rtrn = left.v <= right.v;
        return () => rtrn;
    }
    _bindColCol(batch, left, right) {
        const left_func = left.bind(batch);
        const right_func = right.bind(batch);
        return (idx, cols) => left_func(idx, cols) <= right_func(idx, cols);
    }
    _bindColLit(batch, col, lit) {
        const col_func = col.bind(batch);
        return (idx, cols) => col_func(idx, cols) <= lit.v;
    }
    _bindLitCol(batch, lit, col) {
        const col_func = col.bind(batch);
        return (idx, cols) => lit.v <= col_func(idx, cols);
    }
}
/** @ignore */
class extension_GTeq extends extension_ComparisonPredicate {
    _bindLitLit(_batch, left, right) {
        const rtrn = left.v >= right.v;
        return () => rtrn;
    }
    _bindColCol(batch, left, right) {
        const left_func = left.bind(batch);
        const right_func = right.bind(batch);
        return (idx, cols) => left_func(idx, cols) >= right_func(idx, cols);
    }
    _bindColLit(batch, col, lit) {
        const col_func = col.bind(batch);
        return (idx, cols) => col_func(idx, cols) >= lit.v;
    }
    _bindLitCol(batch, lit, col) {
        const col_func = col.bind(batch);
        return (idx, cols) => lit.v >= col_func(idx, cols);
    }
}
/** @ignore */
class extension_Not extends extension_Predicate {
    constructor(child) {
        super();
        this.child = child;
    }
    bind(batch) {
        const func = this.child.bind(batch);
        return (idx, batch) => !func(idx, batch);
    }
}
/** @ignore */
class extension_CustomPredicate extends extension_Predicate {
    constructor(next, bind_) {
        super();
        this.next = next;
        this.bind_ = bind_;
    }
    bind(batch) {
        this.bind_(batch);
        return this.next;
    }
}
function extension_lit(v) { return new extension_predicate_Literal(v); }
function extension_col(n) { return new extension_Col(n); }
function extension_and(...p) { return new extension_And(...p); }
function extension_or(...p) { return new extension_Or(...p); }
function extension_custom(next, bind) {
    return new extension_CustomPredicate(next, bind);
}

//# sourceMappingURL=predicate.mjs.map

;// ../../node_modules/apache-arrow/compute/dataframe.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.






extension_table_Table.prototype.countBy = function (name) { return new extension_DataFrame(this.chunks).countBy(name); };
extension_table_Table.prototype.scan = function (next, bind) { return new extension_DataFrame(this.chunks).scan(next, bind); };
extension_table_Table.prototype.scanReverse = function (next, bind) { return new extension_DataFrame(this.chunks).scanReverse(next, bind); };
extension_table_Table.prototype.filter = function (predicate) { return new extension_DataFrame(this.chunks).filter(predicate); };
class extension_DataFrame extends extension_table_Table {
    filter(predicate) {
        return new extension_FilteredDataFrame(this.chunks, predicate);
    }
    scan(next, bind) {
        const batches = this.chunks, numBatches = batches.length;
        for (let batchIndex = -1; ++batchIndex < numBatches;) {
            // load batches
            const batch = batches[batchIndex];
            if (bind) {
                bind(batch);
            }
            // yield all indices
            for (let index = -1, numRows = batch.length; ++index < numRows;) {
                next(index, batch);
            }
        }
    }
    scanReverse(next, bind) {
        const batches = this.chunks, numBatches = batches.length;
        for (let batchIndex = numBatches; --batchIndex >= 0;) {
            // load batches
            const batch = batches[batchIndex];
            if (bind) {
                bind(batch);
            }
            // yield all indices
            for (let index = batch.length; --index >= 0;) {
                next(index, batch);
            }
        }
    }
    countBy(name) {
        const batches = this.chunks, numBatches = batches.length;
        const count_by = typeof name === 'string' ? new extension_Col(name) : name;
        // Assume that all dictionary batches are deltas, which means that the
        // last record batch has the most complete dictionary
        count_by.bind(batches[numBatches - 1]);
        const vector = count_by.vector;
        if (!extension_DataType.isDictionary(vector.type)) {
            throw new Error('countBy currently only supports dictionary-encoded columns');
        }
        const countByteLength = Math.ceil(Math.log(vector.length) / Math.log(256));
        const CountsArrayType = countByteLength == 4 ? Uint32Array :
            countByteLength >= 2 ? Uint16Array : Uint8Array;
        const counts = new CountsArrayType(vector.dictionary.length);
        for (let batchIndex = -1; ++batchIndex < numBatches;) {
            // load batches
            const batch = batches[batchIndex];
            // rebind the countBy Col
            count_by.bind(batch);
            const keys = count_by.vector.indices;
            // yield all indices
            for (let index = -1, numRows = batch.length; ++index < numRows;) {
                let key = keys.get(index);
                if (key !== null) {
                    counts[key]++;
                }
            }
        }
        return new extension_CountByResult(vector.dictionary, extension_IntVector.from(counts));
    }
}
/** @ignore */
class extension_CountByResult extends extension_table_Table {
    constructor(values, counts) {
        const schema = new extension_Schema([
            new extension_Field('values', values.type),
            new extension_Field('counts', counts.type)
        ]);
        super(new extension_recordbatch_RecordBatch(schema, counts.length, [values, counts]));
    }
    toJSON() {
        const values = this.getColumnAt(0);
        const counts = this.getColumnAt(1);
        const result = {};
        for (let i = -1; ++i < this.length;) {
            result[values.get(i)] = counts.get(i);
        }
        return result;
    }
}
/** @ignore */
class extension_FilteredDataFrame extends extension_DataFrame {
    constructor(batches, predicate) {
        super(batches);
        this._predicate = predicate;
    }
    scan(next, bind) {
        // inlined version of this:
        // this.parent.scan((idx, columns) => {
        //     if (this.predicate(idx, columns)) next(idx, columns);
        // });
        const batches = this._chunks;
        const numBatches = batches.length;
        for (let batchIndex = -1; ++batchIndex < numBatches;) {
            // load batches
            const batch = batches[batchIndex];
            const predicate = this._predicate.bind(batch);
            let isBound = false;
            // yield all indices
            for (let index = -1, numRows = batch.length; ++index < numRows;) {
                if (predicate(index, batch)) {
                    // bind batches lazily - if predicate doesn't match anything
                    // in the batch we don't need to call bind on the batch
                    if (bind && !isBound) {
                        bind(batch);
                        isBound = true;
                    }
                    next(index, batch);
                }
            }
        }
    }
    scanReverse(next, bind) {
        const batches = this._chunks;
        const numBatches = batches.length;
        for (let batchIndex = numBatches; --batchIndex >= 0;) {
            // load batches
            const batch = batches[batchIndex];
            const predicate = this._predicate.bind(batch);
            let isBound = false;
            // yield all indices
            for (let index = batch.length; --index >= 0;) {
                if (predicate(index, batch)) {
                    // bind batches lazily - if predicate doesn't match anything
                    // in the batch we don't need to call bind on the batch
                    if (bind && !isBound) {
                        bind(batch);
                        isBound = true;
                    }
                    next(index, batch);
                }
            }
        }
    }
    count() {
        // inlined version of this:
        // let sum = 0;
        // this.parent.scan((idx, columns) => {
        //     if (this.predicate(idx, columns)) ++sum;
        // });
        // return sum;
        let sum = 0;
        const batches = this._chunks;
        const numBatches = batches.length;
        for (let batchIndex = -1; ++batchIndex < numBatches;) {
            // load batches
            const batch = batches[batchIndex];
            const predicate = this._predicate.bind(batch);
            // yield all indices
            for (let index = -1, numRows = batch.length; ++index < numRows;) {
                if (predicate(index, batch)) {
                    ++sum;
                }
            }
        }
        return sum;
    }
    *[Symbol.iterator]() {
        // inlined version of this:
        // this.parent.scan((idx, columns) => {
        //     if (this.predicate(idx, columns)) next(idx, columns);
        // });
        const batches = this._chunks;
        const numBatches = batches.length;
        for (let batchIndex = -1; ++batchIndex < numBatches;) {
            // load batches
            const batch = batches[batchIndex];
            // TODO: bind batches lazily
            // If predicate doesn't match anything in the batch we don't need
            // to bind the callback
            const predicate = this._predicate.bind(batch);
            // yield all indices
            for (let index = -1, numRows = batch.length; ++index < numRows;) {
                if (predicate(index, batch)) {
                    yield batch.get(index);
                }
            }
        }
    }
    filter(predicate) {
        return new extension_FilteredDataFrame(this._chunks, this._predicate.and(predicate));
    }
    countBy(name) {
        const batches = this._chunks, numBatches = batches.length;
        const count_by = typeof name === 'string' ? new extension_Col(name) : name;
        // Assume that all dictionary batches are deltas, which means that the
        // last record batch has the most complete dictionary
        count_by.bind(batches[numBatches - 1]);
        const vector = count_by.vector;
        if (!extension_DataType.isDictionary(vector.type)) {
            throw new Error('countBy currently only supports dictionary-encoded columns');
        }
        const countByteLength = Math.ceil(Math.log(vector.length) / Math.log(256));
        const CountsArrayType = countByteLength == 4 ? Uint32Array :
            countByteLength >= 2 ? Uint16Array : Uint8Array;
        const counts = new CountsArrayType(vector.dictionary.length);
        for (let batchIndex = -1; ++batchIndex < numBatches;) {
            // load batches
            const batch = batches[batchIndex];
            const predicate = this._predicate.bind(batch);
            // rebind the countBy Col
            count_by.bind(batch);
            const keys = count_by.vector.indices;
            // yield all indices
            for (let index = -1, numRows = batch.length; ++index < numRows;) {
                let key = keys.get(index);
                if (key !== null && predicate(index, batch)) {
                    counts[key]++;
                }
            }
        }
        return new extension_CountByResult(vector.dictionary, extension_IntVector.from(counts));
    }
}

//# sourceMappingURL=dataframe.mjs.map

;// ../../node_modules/apache-arrow/Arrow.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
























/** @ignore */
const extension_util = {
    ...extension_bn_namespaceObject,
    ...extension_util_int_namespaceObject,
    ...extension_bit_namespaceObject,
    ...extension_util_math_namespaceObject,
    ...extension_buffer_namespaceObject,
    ...extension_util_vector_namespaceObject
};

//# sourceMappingURL=Arrow.mjs.map

;// ../../node_modules/apache-arrow/Arrow.dom.mjs
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.








extension_adapters.toDOMStream = extension_toDOMStream;
extension_Builder['throughDOM'] = extension_builderThroughDOMStream;
extension_RecordBatchReader['throughDOM'] = extension_recordBatchReaderThroughDOMStream;
extension_RecordBatchWriter['throughDOM'] = extension_recordBatchWriterThroughDOMStream;


//# sourceMappingURL=Arrow.dom.mjs.map

;// ../../node_modules/arquero/src/arrow/arrow-types.js
// Hardwire Arrow type ids to sidestep dependency
// https://github.com/apache/arrow/blob/master/js/src/enum.ts

/* harmony default export */ const extension_arrow_types = ({
  /** The default placeholder type */
  NONE: 0,
  /** A NULL type having no physical storage */
  Null: 1,
  /** Signed or unsigned 8, 16, 32, or 64-bit little-endian integer */
  Int: 2,
  /** 2, 4, or 8-byte floating point value */
  Float: 3,
  /** Variable-length bytes (no guarantee of UTF8-ness) */
  Binary: 4,
  /** UTF8 variable-length string as List<Char> */
  Utf8: 5,
  /** Boolean as 1 bit, LSB bit-packed ordering */
  Bool: 6,
  /** Precision-and-scale-based decimal type. Storage type depends on the parameters. */
  Decimal: 7,
  /** int32_t days or int64_t milliseconds since the UNIX epoch */
  Date: 8,
  /** Time as signed 32 or 64-bit integer, representing either seconds, milliseconds, microseconds, or nanoseconds since midnight since midnight */
  Time: 9,
  /** Exact timestamp encoded with int64 since UNIX epoch (Default unit millisecond) */
  Timestamp: 10,
  /** YEAR_MONTH or DAY_TIME interval in SQL style */
  Interval: 11,
  /** A list of some logical data type */
  List: 12,
  /** Struct of logical types */
  Struct: 13,
  /** Union of logical types */
  Union: 14,
  /** Fixed-size binary. Each value occupies the same number of bytes */
  FixedSizeBinary: 15,
  /** Fixed-size list. Each value occupies the same number of bytes */
  FixedSizeList: 16,
  /** Map of named logical types */
  Map: 17,

  /** Dictionary aka Category type */
  Dictionary: -1,
  Int8: -2,
  Int16: -3,
  Int32: -4,
  Int64: -5,
  Uint8: -6,
  Uint16: -7,
  Uint32: -8,
  Uint64: -9,
  Float16: -10,
  Float32: -11,
  Float64: -12,
  DateDay: -13,
  DateMillisecond: -14,
  TimestampSecond: -15,
  TimestampMillisecond: -16,
  TimestampMicrosecond: -17,
  TimestampNanosecond: -18,
  TimeSecond: -19,
  TimeMillisecond: -20,
  TimeMicrosecond: -21,
  TimeNanosecond: -22,
  DenseUnion: -23,
  SparseUnion: -24,
  IntervalDayTime: -25,
  IntervalYearMonth: -26
});
;// ../../node_modules/arquero/src/arrow/builder/util.js


function extension_ceil64Bytes(length, bpe = 1) {
  return ((((length * bpe) + 63) & ~63) || 64) / bpe;
}

function extension_util_array(Type, length, bpe = Type.BYTES_PER_ELEMENT) {
  return new Type(extension_ceil64Bytes(length, bpe));
}

function extension_arrowData(d) {
  return d instanceof extension_Data
    ? d
    : extension_Data.new(d.type, 0, d.length, d.nulls, d.buffers, null, d.dict);
}

function extension_arrowVector(data) {
  return extension_AbstractVector.new(extension_arrowData(data));
}

const extension_encoder = new TextEncoder();

function extension_encode(data, idx, str) {
  const bytes = extension_encoder.encode(str);
  data.set(bytes, idx);
  return bytes.length;
}

function extension_encodeInto(data, idx, str) {
  return extension_encoder.encodeInto(str, data.subarray(idx)).written;
}

const extension_writeUtf8 = extension_encoder.encodeInto ? extension_encodeInto : extension_encode;
;// ../../node_modules/arquero/src/arrow/builder/array-builder.js


/* harmony default export */ function extension_array_builder(type, length) {
  const data = extension_util_array(type.ArrayType, length);
  return {
    set(value, index) { data[index] = value; },
    data: () => ({ type, length, buffers: [null, data] })
  };
}
;// ../../node_modules/arquero/src/arrow/builder/bool-builder.js


/* harmony default export */ function extension_bool_builder(type, length) {
  const data = extension_util_array(type.ArrayType, length / 8);
  return {
    set(value, index) {
      if (value) data[index >> 3] |= (1 << (index % 8));
    },
    data: () => ({ type, length, buffers: [null, data] })
  };
}
;// ../../node_modules/arquero/src/arrow/builder/date-day-builder.js


/* harmony default export */ function extension_date_day_builder(type, length) {
  const data = extension_util_array(type.ArrayType, length);
  return {
    set(value, index) { data[index] = (value / 86400000) | 0; },
    data: () => ({ type, length, buffers: [null, data] })
  };
}
;// ../../node_modules/arquero/src/arrow/builder/date-millis-builder.js


/* harmony default export */ function extension_date_millis_builder(type, length) {
  const data = extension_util_array(type.ArrayType, length << 1);
  return {
    set(value, index) {
      const i = index << 1;
      data[  i] = (value % 4294967296) | 0;
      data[i+1] = (value / 4294967296) | 0;
    },
    data: () => ({ type, length, buffers: [null, data] })
  };
}
;// ../../node_modules/arquero/src/arrow/builder/default-builder.js


/* harmony default export */ function extension_default_builder(type) {
  const b = extension_Builder.new({
    type,
    nullValues: [null, undefined],
    highWaterMark: Infinity
  });
  return {
    set(value, index) { b.set(index, value); },
    data: () => b.finish().flush()
  };
}
;// ../../node_modules/arquero/src/arrow/builder/utf8-builder.js


/* harmony default export */ function extension_utf8_builder(type, length, strlen) {
  const offset = extension_util_array(Int32Array, length + 1);
  const buf = extension_util_array(Uint8Array, 3 * strlen);

  let idx = 0;

  return {
    set(value, index) {
      idx += extension_writeUtf8(buf, idx, value);
      offset[index + 1] = idx;
    },
    data: () => {
      // slice utf buffer if over-allocated
      const dlen = extension_ceil64Bytes(idx);
      const data = buf.length > dlen ? buf.subarray(0, dlen) : buf;
      return { type, length, buffers: [offset, data] };
    }
  };
}
;// ../../node_modules/arquero/src/arrow/builder/dictionary-builder.js



/* harmony default export */ function extension_dictionary_builder(type, length) {
  const values = [];
  const data = extension_util_array(type.indices.ArrayType, length);
  const keys = Object.create(null);

  let next = -1;
  let strlen = 0;

  return {
    set(value, index) {
      const v = String(value);
      let k = keys[v];
      if (k === undefined) {
        strlen += v.length;
        keys[v] = k = ++next;
        values.push(v);
      }
      data[index] = k;
    },
    data: () => ({
      type,
      length,
      buffers: [null, data],
      dict: extension_dictionary(type.dictionary, values, strlen)
    })
  };
}

function extension_dictionary(type, values, strlen) {
  const b = extension_utf8_builder(type, values.length, strlen);
  values.forEach(b.set);
  return extension_arrowVector(b.data());
}
;// ../../node_modules/arquero/src/arrow/builder/valid-builder.js


/* harmony default export */ function extension_valid_builder(builder, length) {
  const valid = extension_util_array(Uint8Array, length / 8);
  let nulls = 0;

  return {
    set(value, index) {
      if (value == null) {
        ++nulls;
      } else {
        builder.set(value, index);
        valid[index >> 3] |= (1 << (index % 8));
      }
    },
    data: () => {
      const d = builder.data();
      if (nulls) {
        d.nulls = nulls;
        d.buffers[2] = valid;
      }
      return d;
    }
  };
}
;// ../../node_modules/arquero/src/arrow/builder/index.js









/* harmony default export */ function extension_builder(type, nrows, nullable = true) {
  let method;

  switch (type.typeId) {
    case extension_arrow_types.Int:
      method = type.bitWidth < 64 ? extension_array_builder : null;
      break;
    case extension_arrow_types.Float:
      method = type.precision > 0 ? extension_array_builder : null;
      break;
    case extension_arrow_types.Dictionary:
      // check sub-types against builder assumptions
      // if check fails, fallback to default builder
      method = (
        type.dictionary.typeId === extension_arrow_types.Utf8 &&
        type.indices.typeId === extension_arrow_types.Int &&
        type.indices.bitWidth < 64
      ) ? extension_dictionary_builder : null;
      break;
    case extension_arrow_types.Bool:
      method = extension_bool_builder;
      break;
    case extension_arrow_types.Date:
      method = type.unit ? extension_date_millis_builder : extension_date_day_builder;
      break;
  }

  return method == null ? extension_default_builder(type)
    : nullable ? extension_valid_builder(method(type, nrows), nrows)
    : method(type, nrows);
}
;// ../../node_modules/arquero/src/arrow/encode/data-from.js



function extension_dataFromArray(array, type) {
  const length = array.length;
  const size = extension_ceil64Bytes(length, array.BYTES_PER_ELEMENT);

  let data = array;
  if (length !== size) {
    data = new array.constructor(size);
    data.set(array);
  }

  return extension_arrowData({ type, length, buffers: [null, data] });
}

function extension_dataFromScan(nrows, scan, column, type, nullable = true) {
  const b = extension_builder(type, nrows, nullable);
  scan(column, b.set);
  return extension_arrowData(b.data());
}
;// ../../node_modules/arquero/src/arrow/builder/resolve-type.js





/* harmony default export */ function extension_resolve_type(type) {
  if (type instanceof extension_DataType || type == null) {
    return type;
  }

  switch (type) {
    case extension_arrow_types.Binary:
      return new extension_Binary();
    case extension_arrow_types.Bool:
      return new extension_Bool();
    case extension_arrow_types.DateDay:
      return new extension_DateDay();
    case extension_arrow_types.DateMillisecond:
    case extension_arrow_types.Date:
      return new extension_DateMillisecond();
    case extension_arrow_types.Dictionary:
      return new extension_type_Dictionary(new extension_Utf8(), new extension_Int32());
    case extension_arrow_types.Float16:
      return new extension_Float16();
    case extension_arrow_types.Float32:
      return new extension_Float32();
    case extension_arrow_types.Float64:
    case extension_arrow_types.Float:
      return new extension_Float64();
    case extension_arrow_types.Int8:
      return new extension_Int8();
    case extension_arrow_types.Int16:
      return new extension_Int16();
    case extension_arrow_types.Int32:
    case extension_arrow_types.Int:
      return new extension_Int32();
    case extension_arrow_types.Int64:
      return new extension_Int64();
    case extension_arrow_types.IntervalDayTime:
      return new extension_IntervalDayTime();
    case extension_arrow_types.Interval:
    case extension_arrow_types.IntervalYearMonth:
      return new extension_IntervalYearMonth();
    case extension_arrow_types.Null:
      return new extension_Null();
    case extension_arrow_types.TimeMicrosecond:
      return new extension_TimeMicrosecond();
    case extension_arrow_types.TimeMillisecond:
    case extension_arrow_types.Time:
      return new extension_TimeMillisecond();
    case extension_arrow_types.TimeNanosecond:
      return new extension_TimeNanosecond();
    case extension_arrow_types.TimeSecond:
      return new extension_TimeSecond();
    case extension_arrow_types.Uint8:
      return new extension_Uint8();
    case extension_arrow_types.Uint16:
      return new extension_Uint16();
    case extension_arrow_types.Uint32:
      return new extension_Uint32();
    case extension_arrow_types.Uint64:
      return new extension_Uint64();
    case extension_arrow_types.Utf8:
      return new extension_Utf8();
    default:
      extension_util_error(
        `Unsupported type code: ${extension_to_string(type)}. ` +
        'Use a data type constructor instead?'
      );
  }
}
;// ../../node_modules/arquero/src/util/is-exact-utc-date.js
/* harmony default export */ function extension_is_exact_utc_date(d) {
  return d.getUTCHours() === 0
    && d.getUTCMinutes() === 0
    && d.getUTCSeconds() === 0
    && d.getUTCMilliseconds() === 0;
}
;// ../../node_modules/arquero/src/arrow/encode/profiler.js








function extension_profile(scan, column) {
  const p = extension_profiler();
  scan(column, p.add);
  return p;
}

function extension_profiler() {
  const p = {
    count: 0,
    nulls: 0,
    bools: 0,
    nums: 0,
    ints: 0,
    bigints: 0,
    min: Infinity,
    max: -Infinity,
    digits: 0,
    dates: 0,
    utcdays: 0,
    strings: 0,
    strlen: 0,
    arrays: 0,
    minlen: Infinity,
    maxlen: 0,
    structs: 0,

    add(value) {
      ++p.count;
      if (value == null) {
        ++p.nulls;
        return;
      }

      const type = typeof value;
      if (type === 'string') {
        ++p.strings;
      } else if (type === 'number') {
        ++p.nums;
        if (value < p.min) p.min = value;
        if (value > p.max) p.max = value;
        if (Number.isInteger(value)) ++p.ints;
      } else if (type === 'boolean') {
        ++p.bools;
      } else if (type === 'object') {
        if (extension_is_date(value)) {
          ++p.dates;
          if (extension_is_exact_utc_date(value)) {
            ++p.utcdays;
          }
        } else if (extension_is_array_type_isArrayType(value)) {
          ++p.arrays;
          if (value.length < p.minlen) p.minlen = value.length;
          if (value.length > p.maxlen) p.maxlen = value.length;
          const ap = p.array_prof || (p.array_prof = extension_profiler());
          value.forEach(ap.add);
        } else {
          ++p.structs;
          const sp = p.struct_prof || (p.struct_prof = {});
          for (const key in value) {
            const fp = sp[key] || (sp[key] = extension_profiler());
            fp.add(value[key]);
          }
        }
      } else if (type === 'bigint') {
        ++p.bigints;
        if (value < p.min) p.min = value;
        if (value > p.max) p.max = value;
      }
    },
    type() {
      return extension_resolve_type(extension_infer(p));
    }
  };

  return p;
}

function extension_infer(p) {
  const valid = p.count - p.nulls;

  if (valid === 0) {
    return extension_arrow_types.Null;
  }
  else if (p.ints === valid) {
    const v = Math.max(Math.abs(p.min) - 1, p.max);
    return p.min < 0
      ? v >= 2 ** 31 ? extension_arrow_types.Float64
        : v < (1 << 7) ? extension_arrow_types.Int8 : v < (1 << 15) ? extension_arrow_types.Int16 : extension_arrow_types.Int32
      : v >= 2 ** 32 ? extension_arrow_types.Float64
        : v < (1 << 8) ? extension_arrow_types.Uint8 : v < (1 << 16) ? extension_arrow_types.Uint16 : extension_arrow_types.Uint32;
  }
  else if (p.nums === valid) {
    return extension_arrow_types.Float64;
  }
  else if (p.bigints === valid) {
    const v = -p.min > p.max ? -p.min - 1n : p.max;
    return p.min < 0
      ? v < 2 ** 63 ? extension_arrow_types.Int64
        : extension_util_error(`BigInt exceeds 64 bits: ${v}`)
      : p.max < 2 ** 64 ? extension_arrow_types.Uint64
        : extension_util_error(`BigInt exceeds 64 bits: ${p.max}`);
  }
  else if (p.bools === valid) {
    return extension_arrow_types.Bool;
  }
  else if (p.utcdays === valid) {
    return extension_arrow_types.DateDay;
  }
  else if (p.dates === valid) {
    return extension_arrow_types.DateMillisecond;
  }
  else if (p.arrays === valid) {
    const type = extension_Field.new('value', p.array_prof.type(), true);
    return p.minlen === p.maxlen
      ? new extension_FixedSizeList(p.minlen, type)
      : new extension_List(type);
  }
  else if (p.structs === valid) {
    const sp = p.struct_prof;
    return new extension_Struct(
      Object.keys(sp).map(name => extension_Field.new(name, sp[name].type(), true))
    );
  }
  else if (p.strings > 0) {
    return extension_arrow_types.Dictionary;
  }
  else {
    extension_util_error('Type inference failure');
  }
}
;// ../../node_modules/arquero/src/arrow/encode/data-from-objects.js




/* harmony default export */ function extension_data_from_objects(data, name, nrows, scan, type, nullable = true) {
  type = extension_resolve_type(type);

  // perform type inference if needed
  if (!type) {
    const p = extension_profile(scan, name);
    nullable = p.nulls > 0;
    type = p.type();
  }

  return extension_dataFromScan(nrows, scan, name, type, nullable);
}
;// ../../node_modules/arquero/src/arrow/encode/data-from-table.js






/* harmony default export */ function extension_data_from_table(table, name, nrows, scan, type, nullable = true) {
  type = extension_resolve_type(type);
  const column = table.column(name);
  const reified = !(table.isFiltered() || table.isOrdered());

  // use existing arrow data if types match
  const vec = extension_data_from_table_arrowVector(column);
  if (vec && reified && extension_typeCompatible(vec.type, type)) {
    return vec;
  }

  // if backing data is a typed array, leverage that
  const data = column.data;
  if (extension_is_typed_array(data)) {
    const dtype = extension_typeFromArray(data);
    if (reified && dtype && extension_typeCompatible(dtype, type)) {
      return extension_dataFromArray(data, dtype);
    } else {
      type = type || dtype;
      nullable = false;
    }
  }

  // perform type inference if needed
  if (!type) {
    const p = extension_profile(scan, column);
    nullable = p.nulls > 0;
    type = p.type();
  }

  return extension_dataFromScan(nrows, scan, column, type, nullable);
}

function extension_data_from_table_arrowVector(value) {
  return value instanceof extension_AbstractVector ? value
    : value.vector instanceof extension_AbstractVector ? value.vector
    : null;
}

function extension_typeFromArray(data) {
  const types = {
    Float32Array:    extension_Float32,
    Float64Array:    extension_Float64,
    Int8Array:       extension_Int8,
    Int16Array:      extension_Int16,
    Int32Array:      extension_Int32,
    Uint8Array:      extension_Uint8,
    Uint16Array:     extension_Uint16,
    Uint32Array:     extension_Uint32,
    BigInt64Array:   extension_Int64,
    BigUint64Array:  extension_Uint64
  };
  const Type = types[data.constructor.name];
  return Type ? new Type() : null;
}

function extension_typeCompatible(a, b) {
  return !a || !b ? true : a.compareTo(b);
}
;// ../../node_modules/arquero/src/arrow/encode/scan.js


function extension_scanArray(data, limit, offset) {
  const n = Math.min(data.length, offset + limit);
  return (name, visit) => {
    for (let i = offset; i < n; ++i) {
      visit(data[i][name], i);
    }
  };
}

function extension_scanTable(table, limit, offset) {
  const scanAll = offset === 0 && table.numRows() <= limit
               && !table.isFiltered() && !table.isOrdered();

  return (column, visit) => {
    let i = -1;
    scanAll && extension_is_array_type_isArrayType(column.data)
      ? column.data.forEach(visit)
      : table.scan(
          row => visit(column.get(row), ++i),
          true, limit, offset
        );
  };
}
;// ../../node_modules/arquero/src/arrow/arrow-table.js



function extension_table() {
  // trap Table access to provide a helpful message
  // when Apache Arrow has not been imported
  try {
    return extension_table_Table;
  } catch (err) {
    extension_util_error(
      'Apache Arrow not imported, ' +
      'see https://github.com/uwdata/arquero#usage'
    );
  }
}

function extension_arrow_table_from(arrow) {
  return arrow && arrow.chunks ? arrow : extension_table().from(arrow);
}
;// ../../node_modules/arquero/src/arrow/encode/index.js
 // eslint-disable-line no-unused-vars









/**
 * Options for Arrow encoding.
 * @typedef {object} ArrowFormatOptions
 * @property {number} [limit=Infinity] The maximum number of rows to include.
 * @property {number} [offset=0] The row offset indicating how many initial
 *  rows to skip.
 * @property {string[]|(data: object) => string[]} [columns] Ordered list of
 *  column names to include. If function-valued, the function should accept
 *  a dataset as input and return an array of column name strings.
 * @property {object} [types] The Arrow data types to use. If specified,
 *  the input should be an object with column names for keys and Arrow data
 *  types for values. If a column type is not explicitly provided, type
 *  inference will be performed to guess an appropriate type.
 */

/**
 * Create an Apache Arrow table for an input dataset.
 * @param {Array|object} data An input dataset to convert to Arrow format.
 *  If array-valued, the data should consist of an array of objects where
 *  each entry represents a row and named properties represent columns.
 *  Otherwise, the input data should be an Arquero table.
 * @param {ArrowFormatOptions} [options] Encoding options, including
 *  column data types.
 * @return {Table} An Apache Arrow Table instance.
 */
/* harmony default export */ function extension_arrow_encode(data, options = {}) {
  const { types = {} } = options;
  const { dataFrom, names, nrows, scan } = extension_encode_init(data, options);
  return extension_table().new(
    names.map(name => {
      const col = dataFrom(data, name, nrows, scan, types[name]);
      return col.length === nrows
        ? col
        : extension_util_error('Column length mismatch');
    }),
    names
  );
}

function extension_encode_init(data, options) {
  const { columns, limit = Infinity, offset = 0 } = options;
  const names = extension_util_is_function(columns) ? columns(data)
    : extension_is_array(columns) ? columns
    : null;
  if (extension_is_array(data)) {
    return {
      dataFrom: extension_data_from_objects,
      names: names || Object.keys(data[0]),
      nrows: Math.min(limit, data.length - offset),
      scan: extension_scanArray(data, limit, offset)
    };
  } else if (extension_isTable(data)) {
    return {
      dataFrom: extension_data_from_table,
      names: names || data.columnNames(),
      nrows: Math.min(limit, data.numRows() - offset),
      scan: extension_scanTable(data, limit, offset)
    };
  } else {
    extension_util_error('Unsupported input data type');
  }
}

function extension_isTable(data) {
  return data && extension_util_is_function(data.reify);
}
;// ../../node_modules/arquero/src/format/to-arrow.js

/* harmony default export */ const extension_to_arrow = (extension_arrow_encode);
;// ../../node_modules/arquero/src/format/infer.js


function extension_isExactDateUTC(d) {
  return d.getUTCHours() === 0
    && d.getUTCMinutes() === 0
    && d.getUTCSeconds() === 0
    && d.getUTCMilliseconds() === 0;
}

/* harmony default export */ function extension_format_infer(scan, options = {}) {
  let count = 0;
  let nulls = 0;
  let dates = 0;
  let dutcs = 0;
  let nums = 0;
  let digits = 0;

  scan(value => {
    ++count;
    if (value == null) {
      ++nulls;
      return;
    }

    const type = typeof value;
    if (type === 'object' && extension_is_date(value)) {
      ++dates;
      if (extension_isExactDateUTC(value)) ++dutcs;
    } else if (type === 'number') {
      ++nums;
      if (value === value &&  (value | 0) !== value) {
        const s = value + '';
        const p = s.indexOf('.');
        if (p >= 0) {
          const e = s.indexOf('e');
          const l = e > 0 ? e : s.length;
          digits = Math.max(digits, l - p - 1);
        }
      }
    }
  });

  return {
    align:  (nulls + nums + dates) / count > 0.5 ? 'r' : 'l',
    format: {
      utc:    dates === dutcs,
      digits: Math.min(digits, options.maxdigits || 6)
    }
  };
}
;// ../../node_modules/arquero/src/format/util.js
 // eslint-disable-line no-unused-vars




/**
 * Column selection function.
 * @typedef {(table: Table) => string[]} ColumnSelectFunction
 */

/**
 * Column selection options.
 * @typedef {string[]|ColumnSelectFunction} ColumnSelectOptions
 */

/**
 * Column format options. The object keys should be column names.
 * The object values should be formatting functions or objects.
 * If specified, these override any automatically inferred options.
 * @typedef {Object.<string, import('./value').ValueFormatOptions} ColumnFormatOptions
 */

/**
 * Column alignment options. The object keys should be column names.
 * The object values should be aligment strings, one of 'l' (left),
 * 'c' (center), or 'r' (right).
 * If specified, these override any automatically inferred options.
 * @typedef {Object.<string, 'l'|'c'|'r'>} ColumnAlignOptions
 */

function extension_columns(table, names) {
  return extension_util_is_function(names)
    ? names(table)
    : names || table.columnNames();
}

function extension_formats(table, names, options) {
  const formatOpt = options.format || {};
  const alignOpt = options.align || {};
  const format = {};
  const align = {};

  names.forEach(name => {
    const auto = extension_format_infer(extension_values(table, name), options);
    align[name] = alignOpt[name] || auto.align;
    format[name] = formatOpt[name] || auto.format;
  });

  return { align, format };
}

function extension_values(table, columnName) {
  const column = table.column(columnName);
  return fn => table.scan(row => fn(column.get(row)));
}

function extension_scan(table, names, limit = 100, offset, ctx) {
  const data = table.data();
  const n = names.length;
  table.scan(row => {
    ctx.row(row);
    for (let i = 0; i < n; ++i) {
      const name = names[i];
      ctx.cell(data[names[i]].get(row), name, i);
    }
  }, true, limit, offset);
}
;// ../../node_modules/arquero/src/format/to-csv.js
 // eslint-disable-line no-unused-vars





/**
 * Options for CSV formatting.
 * @typedef {object} CSVFormatOptions
 * @property {string} [delimiter=','] The delimiter between values.
 * @property {number} [limit=Infinity] The maximum number of rows to print.
 * @property {number} [offset=0] The row offset indicating how many initial rows to skip.
 * @property {import('./util').ColumnSelectOptions} [columns] Ordered list
 *  of column names to include. If function-valued, the function should
 *  accept a table as input and return an array of column name strings.
 * @property {Object.<string, (value: any) => any>} [format] Object of column
 *  format options. The object keys should be column names. The object values
 *  should be formatting functions to invoke to transform column values prior
 *  to output. If specified, these override automatically inferred options.
 */

/**
 * Format a table as a comma-separated values (CSV) string. Other
 * delimiters, such as tabs or pipes ('|'), can be specified using
 * the options argument.
 * @param {ColumnTable} table The table to format.
 * @param {CSVFormatOptions} options The formatting options.
 * @return {string} A delimited-value format string.
 */
/* harmony default export */ function extension_to_csv(table, options = {}) {
  const names = extension_columns(table, options.columns);
  const format = options.format || {};
  const delim = options.delimiter || ',';
  const reFormat = new RegExp(`["${delim}\n\r]`);

  const formatValue = value => value == null ? ''
    : extension_is_date(value) ? extension_formatUTCDate(value, true)
    : reFormat.test(value += '') ? '"' + value.replace(/"/g, '""') + '"'
    : value;

  const vals = names.map(formatValue);
  let text = '';

  extension_scan(table, names, options.limit || Infinity, options.offset, {
    row() {
      text += vals.join(delim) + '\n';
    },
    cell(value, name, index) {
      vals[index] = formatValue(format[name] ? format[name](value) : value);
    }
  });

  return text + vals.join(delim);
}
;// ../../node_modules/arquero/src/format/value.js





/**
 * Column format object.
 * @typedef {object} ValueFormatObject
 * @property {boolean} [utc=false] If true, format dates in UTC time.
 * @property {number} [digits=0] The number of fractional digits to include
 *  when formatting numbers.
 * @property {number} [maxlen=30] The maximum string length for formatting
 *  nested object or array values.
 */

/**
 * @callback ValueFormatFunction
 * @param {*} value The value to format.
 * @return {*} A string-coercible or JSON-compatible formatted value.
 */

/**
 * Value format options.
 * @typedef {ValueFormatObject|ValueFormatFunction} ValueFormatOptions
 */

/**
 * Format a value as a string.
 * @param {*} v The value to format.
 * @param {ValueFormatOptions} options Formatting options.
 * @return {string} The formatted string.
 */
/* harmony default export */ function extension_format_value(v, options = {}) {
  if (extension_util_is_function(options)) {
    return options(v) + '';
  }

  const type = typeof v;

  if (type === 'object') {
    if (extension_is_date(v)) {
      return options.utc ? extension_formatUTCDate(v) : extension_formatDate(v);
    } else {
      const s = JSON.stringify(
        v,
        (k, v) => extension_is_typed_array(v) ? Array.from(v) : v
      );
      const maxlen = options.maxlen || 30;
      return s.length > maxlen
        ? s.slice(0, 28) + '\u2026' + (s[0] === '[' ? ']' : '}')
        : s;
    }
  } else if (type === 'number') {
    const digits = options.digits || 0;
    let a;
    return v !== 0 && ((a = Math.abs(v)) >= 1e18 || a < Math.pow(10, -digits))
      ? v.toExponential(digits)
      : v.toFixed(digits);
  } else {
    return v + '';
  }
}
;// ../../node_modules/arquero/src/util/map-object.js
/* harmony default export */ function extension_map_object(obj, fn, output = {}) {
  for (const key in obj) {
    output[key] = fn(obj[key], key);
  }
  return output;
}
;// ../../node_modules/arquero/src/format/to-html.js
 // eslint-disable-line no-unused-vars






/**
 * Null format function.
 * @callback NullFormat
 * @param {null|undefined} [value] The value to format.
 * @return {string} The formatted HTML string.
 */

/**
 * CSS style function.
 * @callback StyleFunction
 * @param {string} name The column name.
 * @param {number} row The table row index.
 * @return {string} A CSS style string.
 */

/**
 * CSS style options.
 * @typedef {Object.<string, string | StyleFunction>} StyleOptions
 */

/**
 * Options for HTML formatting.
 * @typedef {object} HTMLFormatOptions
 * @property {number} [limit=Infinity] The maximum number of rows to print.
 * @property {number} [offset=0] The row offset indicating how many initial rows to skip.
 * @property {import('./util').ColumnSelectOptions} [columns] Ordered list
 *  of column names to include. If function-valued, the function should
 *  accept a table as input and return an array of column name strings.
 * @property {import('./util').ColumnAlignOptions} [align] Object of column
 *  alignment options. The object keys should be column names. The object
 *  values should be aligment strings, one of 'l' (left), 'c' (center), or
 *  'r' (right). If specified, these override automatically inferred options.
 * @property {import('./util').ColumnFormatOptions} [format] Object of column
 *  format options. The object keys should be column names. The object values
 *  should be formatting functions or specification objects. If specified,
 *  these override automatically inferred options.
 * @property {NullFormat} [null] Format function for null or undefined values.
 *  If specified, this function will be invoked with the null or undefined
 *  value as the sole input, and the return value will be used as the HTML
 *  output for the value.
 * @property {StyleOptions} [style] CSS styles to include in HTML output.
 *  The object keys should be HTML table tag names: 'table', 'thead',
 *  'tbody', 'tr', 'th', or 'td'. The object values should be strings of
 *  valid CSS style directives (such as "font-weight: bold;") or functions
 *  that take a column name and row as inputs and return a CSS string.
 * @property {number} [maxdigits=6] The maximum number of fractional digits
 *  to include when formatting numbers. This option is passed to the format
 *  inference method and is overridden by any explicit format options.
 */

/**
 * Format a table as an HTML table string.
 * @param {ColumnTable} table The table to format.
 * @param {HTMLFormatOptions} options The formatting options.
 * @return {string} An HTML table string.
 */
/* harmony default export */ function extension_to_html(table, options = {}) {
  const names = extension_columns(table, options.columns);
  const { align, format } = extension_formats(table, names, options);
  const style = extension_styles(options);
  const nullish = options.null;

  const alignValue = a => a === 'c' ? 'center' : a === 'r' ? 'right' : 'left';
  const escape = s => s.replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;');
  const baseFormat = (value, opt) => escape(extension_format_value(value, opt));
  const formatter = nullish
    ? (value, opt) => value == null ? nullish(value) : baseFormat(value, opt)
    : baseFormat;

  let r = -1;
  let idx = -1;

  const tag = (tag, name, shouldAlign) => {
    const a = shouldAlign ? alignValue(align[name]) : '';
    const s = style[tag] ? (style[tag](name, idx, r) || '') : '';
    const css = (a ? (`text-align: ${a};` + (s ? ' ' : '')) : '') + s;
    return `<${tag}${css ? ` style="${css}"` : ''}>`;
  };

  let text = tag('table')
    + tag('thead')
    + tag('tr', r)
    + names.map(name => `${tag('th', name, 1)}${name}</th>`).join('')
    + '</tr></thead>'
    + tag('tbody');

  extension_scan(table, names, options.limit, options.offset, {
    row(row) {
      r = row;
      text += (++idx ? '</tr>' : '') + tag('tr');
    },
    cell(value, name) {
      text += tag('td', name, 1)
        + formatter(value, format[name])
        + '</td>';
    }
  });

  return text + '</tr></tbody></table>';
}

function extension_styles(options) {
  return extension_map_object(
    options.style,
    value => extension_util_is_function(value) ? value : () => value
  );
}
;// ../../node_modules/arquero/src/util/default-true.js
/* harmony default export */ function extension_default_true(value, trueValue = true, falseValue = false) {
  return (value === undefined || value) ? trueValue : falseValue;
}
;// ../../node_modules/arquero/src/format/to-json.js
 // eslint-disable-line no-unused-vars






/**
 * Options for JSON formatting.
 * @typedef {object} JSONFormatOptions
 * @property {number} [limit=Infinity] The maximum number of rows to print.
 * @property {number} [offset=0] The row offset indicating how many initial
 *  rows to skip.
 * @property {boolean} [schema=true] Flag indicating if table schema metadata
 *  should be included in the JSON output. If false, only the data payload
 *  is included.
 * @property {import('./util').ColumnSelectOptions} [columns] Ordered list
 *  of column names to include. If function-valued, the function should
 *  accept a table as input and return an array of column name strings.
 * @property {Object.<string, (value: any) => any>} [format] Object of column
 *  format options. The object keys should be column names. The object values
 *  should be formatting functions to invoke to transform column values prior
 *  to output. If specified, these override automatically inferred options.
 */

const extension_defaultFormatter = value => extension_is_date(value)
  ? extension_formatUTCDate(value, true)
  : value;

/**
 * Format a table as a JavaScript Object Notation (JSON) string.
 * @param {ColumnTable} table The table to format.
 * @param {JSONFormatOptions} options The formatting options.
 * @return {string} A JSON string.
 */
/* harmony default export */ function extension_to_json(table, options = {}) {
  const schema = extension_default_true(options.schema);
  const format = options.format || {};
  const names = extension_columns(table, options.columns);
  let text = '{';

  if (schema) {
    text += '"schema":{"fields":'
      + JSON.stringify(names.map(name => ({ name })))
      + '},"data":{';
  }

  names.forEach((name, i) => {
    text += (i ? ',' : '') + JSON.stringify(name) + ':[';

    const column = table.column(name);
    const formatter = format[name] || extension_defaultFormatter;
    let r = -1;
    table.scan(row => {
      const value = column.get(row);
      text += (++r ? ',' : '') + JSON.stringify(formatter(value));
    }, true, options.limit, options.offset);

    text += ']';
  });

  return text + '}' + (schema ? '}' : '');
}
;// ../../node_modules/arquero/src/format/to-markdown.js
 // eslint-disable-line no-unused-vars




/**
 * Options for Markdown formatting.
 * @typedef {object} MarkdownFormatOptions
 * @property {number} [limit=Infinity] The maximum number of rows to print.
 * @property {number} [offset=0] The row offset indicating how many initial rows to skip.
 * @property {import('./util').ColumnSelectOptions} [columns] Ordered list
 *  of column names to include. If function-valued, the function should
 *  accept a table as input and return an array of column name strings.
 * @property {import('./util').ColumnAlignOptions} [align] Object of column
 *  alignment options. The object keys should be column names. The object
 *  values should be aligment strings, one of 'l' (left), 'c' (center), or
 *  'r' (right). If specified, these override automatically inferred options.
 * @property {import('./util').ColumnFormatOptions} [format] Object of column
 *  format options. The object keys should be column names. The object values
 *  should be formatting functions or specification objects. If specified,
 *  these override automatically inferred options.
 * @property {number} [maxdigits=6] The maximum number of fractional digits
 *  to include when formatting numbers. This option is passed to the format
 *  inference method and is overridden by any explicit format options.
 */

/**
 * Format a table as a GitHub-Flavored Markdown table string.
 * @param {ColumnTable} table The table to format.
 * @param {MarkdownFormatOptions} options The formatting options.
 * @return {string} A GitHub-Flavored Markdown table string.
 */
/* harmony default export */ function extension_to_markdown(table, options = {}) {
  const names = extension_columns(table, options.columns);
  const { align, format } = extension_formats(table, names, options);

  const alignValue = a => a === 'c' ? ':-:' : a === 'r' ? '-:' : ':-';
  const escape = s => s.replace(/\|/g, '\\|');

  let text = '|'
    + names.map(escape).join('|')
    + '|\n|'
    + names.map(name => alignValue(align[name])).join('|')
    + '|';

  extension_scan(table, names, options.limit, options.offset, {
    row() {
      text += '\n|';
    },
    cell(value, name) {
      text += escape(extension_format_value(value, format[name])) + '|';
    }
  });

  return text + '\n';
}
;// ../../node_modules/arquero/src/util/assign.js


/* harmony default export */ function extension_util_assign(map, pairs) {
  for (const [key, value] of extension_entries(pairs)) {
    map.set(key, value);
  }
  return map;
}
;// ../../node_modules/arquero/src/util/escape-regexp.js
/* harmony default export */ function extension_escape_regexp(str) {
  return str.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&');
}
;// ../../node_modules/arquero/src/helpers/selection.js










function extension_resolve(table, sel, map = new Map()) {
  sel = extension_is_number(sel) ? table.columnName(sel) : sel;

  if (extension_is_string(sel)) {
    map.set(sel, sel);
  } else if (extension_is_array(sel)) {
    sel.forEach(r => extension_resolve(table, r, map));
  } else if (extension_util_is_function(sel)) {
    extension_resolve(table, sel(table), map);
  } else if (extension_is_object(sel)) {
    extension_util_assign(map, sel);
  } else {
    extension_util_error(`Invalid column selection: ${extension_to_string(sel)}`);
  }

  return map;
}

function extension_decorate(value, toObject) {
  value.toObject = toObject;
  return value;
}

function extension_toObject(value) {
  return extension_is_array(value) ? value.map(extension_toObject)
    : value && value.toObject ? value.toObject()
    : value;
}

/**
 * Proxy type for SelectHelper function.
 * @typedef {import('../table/transformable').SelectHelper} SelectHelper
 */

/**
 * Select all columns in a table.
 * Returns a function-valued selection compatible with {@link Table#select}.
 * @return {SelectHelper} Selection function compatible with select().
 */
function extension_selection_all() {
  return extension_decorate(
    table => table.columnNames(),
    () => ({ all: [] })
  );
}

/**
 * Negate a column selection, selecting all other columns in a table.
 * Returns a function-valued selection compatible with {@link Table#select}.
 * @param {...any} selection The selection to negate. May be a column name,
 *  column index, array of either, or a selection function (e.g., from range).
 * @return {SelectHelper} Selection function compatible with select().
 */
function extension_not(...selection) {
  selection = selection.flat();
  return extension_decorate(
    table => {
      const drop = extension_resolve(table, selection);
      return table.columnNames(name => !drop.has(name));
    },
    () => ({ not: extension_toObject(selection) })
  );
}

/**
 * Select a contiguous range of columns.
 * @param {string|number} start The name/index of the first selected column.
 * @param {string|number} end The name/index of the last selected column.
 * @return {SelectHelper} Selection function compatible with select().
 */
function extension_range(start, end) {
  return extension_decorate(
    table => {
      let i = extension_is_number(start) ? start : table.columnIndex(start);
      let j = extension_is_number(end) ? end : table.columnIndex(end);
      if (j < i) { const t = j; j = i; i = t; }
      return table.columnNames().slice(i, j + 1);
    },
    () => ({ range: [start, end] })
  );
}

/**
 * Select all columns whose names match a pattern.
 * @param {string|RegExp} pattern A string or regular expression pattern to match.
 * @return {SelectHelper} Selection function compatible with select().
 */
function extension_matches(pattern) {
  if (extension_is_string(pattern)) pattern = RegExp(extension_escape_regexp(pattern));
  return extension_decorate(
    table => table.columnNames(name => pattern.test(name)),
    () => ({ matches: [pattern.source, pattern.flags] })
  );
}

/**
 * Select all columns whose names start with a string.
 * @param {string} string The string to match at the start of the column name.
 * @return {SelectHelper} Selection function compatible with select().
 */
function extension_startswith(string) {
  return extension_matches(RegExp('^' + escapeRegExp(string)));
}

/**
 * Select all columns whose names end with a string.
 * @param {string} string The string to match at the end of the column name.
 * @return {SelectHelper} Selection function compatible with select().
 */
function extension_endswith(string) {
  return extension_matches(RegExp(escapeRegExp(string) + '$'));
}
;// ../../node_modules/arquero/src/util/array-type.js


/* harmony default export */ function extension_array_type(column) {
  return extension_is_typed_array(column.data) ? column.data.constructor : Array;
}
;// ../../node_modules/arquero/src/table/column-table.js

















/**
 * Class representing a table backed by a named set of columns.
 */
class extension_column_table_ColumnTable extends extension_Table {

  /**
   * Create a new ColumnTable from existing input data.
   * @param {object[]|Iterable<object>|object|Map} values The backing table data values.
   *  If array-valued, should be a list of JavaScript objects with
   *  key-value properties for each column value.
   *  If object- or Map-valued, a table with two columns (one for keys,
   *  one for values) will be created.
   * @param {string[]} [names] The named columns to include.
   * @return {ColumnTable} A new ColumnTable instance.
   */
  static from(values, names) {
    return new extension_column_table_ColumnTable(extension_columns_from(values, names), names);
  }

  /**
   * Create a new table for a set of named columns.
   * @param {object|Map} columns
   *  The set of named column arrays. Keys are column names.
   *  The enumeration order of the keys determines the column indices,
   *  unless the names parameter is specified.
   *  Values must be arrays (or array-like values) of identical length.
   * @param {string[]} [names] Ordered list of column names. If specified,
   *  this array determines the column indices. If not specified, the
   *  key enumeration order of the columns object is used.
   * @return {ColumnTable} the instantiated ColumnTable instance.
   */
  static new(columns, names) {
    if (columns instanceof extension_column_table_ColumnTable) return columns;
    const data = {};
    const keys = [];
    for (const [key, value] of extension_entries(columns)) {
      data[key] = value;
      keys.push(key);
    }
    return new extension_column_table_ColumnTable(data, names || keys);
  }

  /**
   * Instantiate a new ColumnTable instance.
   * @param {object} columns An object mapping column names to values.
   * @param {string[]} [names] An ordered list of column names.
   * @param {BitSet} [filter] A filtering BitSet.
   * @param {GroupBySpec} [group] A groupby specification.
   * @param {RowComparator} [order] A row comparator function.
   * @param {Params} [params] An object mapping parameter names to values.
   */
  constructor(columns, names, filter, group, order, params) {
    extension_map_object(columns, extension_defaultColumnFactory, columns);
    names = names || Object.keys(columns);
    const nrows = names.length ? columns[names[0]].length : 0;
    super(names, nrows, columns, filter, group, order, params);
  }

  /**
   * Create a new table with the same type as this table.
   * The new table may have different data, filter, grouping, or ordering
   * based on the values of the optional configuration argument. If a
   * setting is not specified, it is inherited from the current table.
   * @param {CreateOptions} [options] Creation options for the new table.
   * @return {ColumnTable} A newly created table.
   */
  create({ data, names, filter, groups, order }) {
    const f = filter !== undefined ? filter : this.mask();

    return new extension_column_table_ColumnTable(
      data || this._data,
      names || (!data ? this._names : null),
      f,
      groups !== undefined ? groups : extension_regroup(this._group, filter && f),
      order !== undefined ? order : this._order,
      this._params
    );
  }

  /**
   * Create a new table with additional columns drawn from one or more input
   * tables. All tables must have the same numer of rows and are reified
   * prior to assignment. In the case of repeated column names, input table
   * columns overwrite existing columns.
   * @param {...ColumnTable} tables The tables to merge with this table.
   * @return {ColumnTable} A new table with merged columns.
   * @example table.assign(table1, table2)
   */
  assign(...tables) {
    const nrows = this.numRows();
    const base = this.reify();
    const cset = extension_column_set(base).groupby(base.groups());
    tables.forEach(input => {
      input = extension_column_table_ColumnTable.new(input);
      if (input.numRows() !== nrows) extension_util_error('Assign row counts do not match');
      input = input.reify();
      input.columnNames(name => cset.add(name, input.column(name)));
    });
    return this.create(cset.new());
  }

  /**
   * Get the backing set of columns for this table.
   * @return {ColumnData} Object of named column instances.
   */
  columns() {
    return this._data;
  }

  /**
   * Get the column instance with the given name.
   * @param {string} name The column name.
   * @return {ColumnType | undefined} The named column, or undefined if it does not exist.
   */
  column(name) {
    return this._data[name];
  }

  /**
   * Get the column instance at the given index position.
   * @param {number} index The zero-based column index.
   * @return {ColumnType | undefined} The column, or undefined if it does not exist.
   */
  columnAt(index) {
    return this._data[this._names[index]];
  }

  /**
   * Get an array of values contained in a column. The resulting array
   * respects any table filter or orderby criteria.
   * @param {string} name The column name.
   * @param {ArrayConstructor|import('./table').TypedArrayConstructor} [constructor=Array]
   *  The array constructor for instantiating the output array.
   * @return {import('./table').DataValue[]|import('./table).TypedArray} The array of column values.
   */
  array(name, constructor = Array) {
    const column = this.column(name);
    const array = new constructor(this.numRows());
    let idx = -1;
    this.scan(row => array[++idx] = column.get(row), true);
    return array;
  }

  /**
   * Get the value for the given column and row.
   * @param {string} name The column name.
   * @param {number} [row=0] The row index, defaults to zero if not specified.
   * @return {import('./table').DataValue} The table value at (column, row).
   */
  get(name, row = 0) {
    const column = this.column(name);
    return this.isFiltered() || this.isOrdered()
      ? column.get(this.indices()[row])
      : column.get(row);
  }

  /**
   * Returns an accessor ("getter") function for a column. The returned
   * function takes a row index as its single argument and returns the
   * corresponding column value.
   * @param {string} name The column name.
   * @return {import('./table').ColumnGetter} The column getter function.
   */
  getter(name) {
    const column = this.column(name);
    const indices = this.isFiltered() || this.isOrdered() ? this.indices() : null;
    return indices ? row => column.get(indices[row])
      : column ? row => column.get(row)
      : extension_util_error(`Unrecognized column: ${name}`);
  }

  /**
   * Returns an object representing a table row.
   * @param {number} [row=0] The row index, defaults to zero if not specified.
   * @return {object} A row object with named properties for each column.
   */
  object(row = 0) {
    return extension_objectBuilder(this)(row);
  }

  /**
   * Returns an array of objects representing table rows.
   * @param {ObjectsOptions} [options] The options for row object generation.
   * @return {object[]} An array of row objects.
   */
  objects(options = {}) {
    const { grouped, limit, offset } = options;

    // generate array of row objects
    const names = extension_resolve(this, options.columns || extension_selection_all());
    const create = extension_rowObjectBuilder(names);
    const obj = [];
    this.scan(
      (row, data) => obj.push(create(row, data)),
      true, limit, offset
    );

    // produce nested output as requested
    if (grouped && this.isGrouped()) {
      const idx = [];
      this.scan(row => idx.push(row), true, limit, offset);
      return extension_nest(this, idx, obj, grouped);
    }

    return obj;
  }

  /**
   * Returns an iterator over objects representing table rows.
   * @return {Iterator<object>} An iterator over row objects.
   */
  *[Symbol.iterator]() {
    const create = extension_objectBuilder(this);
    const n = this.numRows();
    for (let i = 0; i < n; ++i) {
      yield create(i);
    }
  }

  /**
   * Create a new fully-materialized instance of this table.
   * All filter and orderby settings are removed from the new table.
   * Instead, the backing data itself is filtered and ordered as needed.
   * @param {number[]} [indices] Ordered row indices to materialize.
   *  If unspecified, all rows passing the table filter are used.
   * @return {ColumnTable} A reified table.
   */
  reify(indices) {
    const nrows = indices ? indices.length : this.numRows();
    const names = this._names;
    let data, groups;

    if (!indices && !this.isOrdered()) {
      if (!this.isFiltered()) {
        return this; // data already reified
      } else if (nrows === this.totalRows()) {
        data = this.data(); // all rows pass filter, skip copy
      }
    }

    if (!data) {
      const scan = indices ? f => indices.forEach(f) : f => this.scan(f, true);
      const ncols = names.length;
      data = {};

      for (let i = 0; i < ncols; ++i) {
        const name = names[i];
        const prev = this.column(name);
        const curr = data[name] = new (extension_array_type(prev))(nrows);
        let r = -1;
        scan(row => curr[++r] = prev.get(row));
      }

      if (this.isGrouped()) {
        groups = extension_reindex(this.groups(), scan, !!indices, nrows);
      }
    }

    return this.create({ data, names, groups, filter: null, order: null });
  }

  /**
   * Apply a sequence of transformations to this table. The output
   * of each transform is passed as input to the next transform, and
   * the output of the last transform is then returned.
   * @param {...(Transform|Transform[])} transforms Transformation
   *  functions to apply to the table in sequence. Each function should
   *  take a single table as input and return a table as output.
   * @return {ColumnTable} The output of the last transform.
   */
  transform(...transforms) {
    return transforms.flat().reduce((t, f) => f(t), this);
  }

  /**
   * Format this table as an Apache Arrow table.
   * @param {ArrowFormatOptions} [options] The formatting options.
   * @return {import('apache-arrow').Table} An Apache Arrow table.
   */
  toArrow(options) {
    return extension_to_arrow(this, options);
  }

  /**
   * Format this table as binary data in the Apache Arrow IPC format.
   * @param {ArrowFormatOptions} [options] The formatting options.
   * @return {Uint8Array} A new Uint8Array of Arrow-encoded binary data.
   */
  toArrowBuffer(options) {
    return extension_to_arrow(this, options).serialize();
  }

  /**
   * Format this table as a comma-separated values (CSV) string. Other
   * delimiters, such as tabs or pipes ('|'), can be specified using
   * the options argument.
   * @param {CSVFormatOptions} [options] The formatting options.
   * @return {string} A delimited value string.
   */
  toCSV(options) {
    return extension_to_csv(this, options);
  }

  /**
   * Format this table as an HTML table string.
   * @param {HTMLFormatOptions} [options] The formatting options.
   * @return {string} An HTML table string.
   */
  toHTML(options) {
    return extension_to_html(this, options);
  }

  /**
   * Format this table as a JavaScript Object Notation (JSON) string.
   * @param {JSONFormatOptions} [options] The formatting options.
   * @return {string} A JSON string.
   */
  toJSON(options) {
    return extension_to_json(this, options);
  }

  /**
   * Format this table as a GitHub-Flavored Markdown table string.
   * @param {MarkdownFormatOptions} [options] The formatting options.
   * @return {string} A GitHub-Flavored Markdown table string.
   */
  toMarkdown(options) {
    return extension_to_markdown(this, options);
  }
}

function extension_objectBuilder(table) {
  let b = table._builder;

  if (!b) {
    const create = extension_rowObjectBuilder(table.columnNames());
    const data = table.data();
    if (table.isOrdered() || table.isFiltered()) {
      const indices = table.indices();
      b = row => create(indices[row], data);
    } else {
      b = row => create(row, data);
    }
    table._builder = b;
  }

  return b;
}

/**
 * A table transformation.
 * @typedef {(table: ColumnTable) => ColumnTable} Transform
 */

/**
 * Proxy type for BitSet class.
 * @typedef {import('./table').BitSet} BitSet
 */

/**
 * Proxy type for ColumnType interface.
 * @typedef {import('./column').ColumnType} ColumnType
 */

/**
 * A named collection of columns.
 * @typedef {{[key: string]: ColumnType}} ColumnData
 */

/**
 * Proxy type for GroupBySpec.
 * @typedef {import('./table').GroupBySpec} GroupBySpec
 */

/**
 * Proxy type for RowComparator.
 * @typedef {import('./table').RowComparator} RowComparator
 */

/**
 * Proxy type for Params.
 * @typedef {import('./table').Params} Params
 */

/**
 * Options for Arrow formatting.
 * @typedef {import('../arrow/encode').ArrowFormatOptions} ArrowFormatOptions
 */

/**
 * Options for CSV formatting.
 * @typedef {import('../format/to-csv').CSVFormatOptions} CSVFormatOptions
 */

/**
 * Options for HTML formatting.
 * @typedef {import('../format/to-html').HTMLFormatOptions} HTMLFormatOptions
 */

/**
 * Options for JSON formatting.
 * @typedef {import('../format/to-json').JSONFormatOptions} JSONFormatOptions
 */

/**
 * Options for Markdown formatting.
 * @typedef {import('../format/to-markdown').MarkdownFormatOptions} MarkdownFormatOptions
 */
;// ../../node_modules/arquero/src/engine/reduce/reducer.js
/**
 * Abstract class for custom aggregation operations.
 */
class extension_Reducer {
  constructor(outputs) {
    this._outputs = outputs;
  }

  size() {
    return this._outputs.length;
  }

  outputs() {
    return this._outputs;
  }

  init(/* columns */) {
    return {};
  }

  add(/* state, row, data */) {
    // no-op, subclasses should override
  }

  rem(/* state, row, data */) {
    // no-op, subclasses should override
  }

  write(/* state, values, index */) {
  }
}
;// ../../node_modules/arquero/src/expression/ast/walk.js
function extension_walk(node, ctx, visitors, parent) {
  const visit = visitors[node.type] || visitors['Default'];
  if (visit && visit(node, ctx, parent) === false) return;

  const walker = extension_walkers[node.type];
  if (walker) walker(node, ctx, visitors);
}

const extension_unary = (node, ctx, visitors) => {
  extension_walk(node.argument, ctx, visitors, node);
};

const extension_walk_binary = (node, ctx, visitors) => {
  extension_walk(node.left, ctx, visitors, node);
  extension_walk(node.right, ctx, visitors, node);
};

const extension_ternary = (node, ctx, visitors) => {
  extension_walk(node.test, ctx, visitors, node);
  extension_walk(node.consequent, ctx, visitors, node);
  if (node.alternate) extension_walk(node.alternate, ctx, visitors, node);
};

const extension_walk_func = (node, ctx, visitors) => {
  extension_walk_list(node.params, ctx, visitors, node);
  extension_walk(node.body, ctx, visitors, node);
};

const extension_walk_call = (node, ctx, visitors) => {
  extension_walk(node.callee, ctx, visitors, node);
  extension_walk_list(node.arguments, ctx, visitors, node);
};

const extension_walk_list = (nodes, ctx, visitors, node) => {
  nodes.forEach(item => extension_walk(item, ctx, visitors, node));
};

const extension_walkers = {
  TemplateLiteral: (node, ctx, visitors) => {
    extension_walk_list(node.expressions, ctx, visitors, node);
    extension_walk_list(node.quasis, ctx, visitors, node);
  },
  MemberExpression: (node, ctx, visitors) => {
    extension_walk(node.object, ctx, visitors, node);
    extension_walk(node.property, ctx, visitors, node);
  },
  CallExpression: extension_walk_call,
  NewExpression: extension_walk_call,
  ArrayExpression: (node, ctx, visitors) => {
    extension_walk_list(node.elements, ctx, visitors, node);
  },
  AssignmentExpression: extension_walk_binary,
  AwaitExpression: extension_unary,
  BinaryExpression: extension_walk_binary,
  LogicalExpression: extension_walk_binary,
  UnaryExpression: extension_unary,
  UpdateExpression: extension_unary,
  ConditionalExpression: extension_ternary,
  ObjectExpression: (node, ctx, visitors) => {
    extension_walk_list(node.properties, ctx, visitors, node);
  },
  Property: (node, ctx, visitors) => {
    extension_walk(node.key, ctx, visitors, node);
    extension_walk(node.value, ctx, visitors, node);
  },

  ArrowFunctionExpression: extension_walk_func,
  FunctionExpression: extension_walk_func,
  FunctionDeclaration: extension_walk_func,

  VariableDeclaration: (node, ctx, visitors) => {
    extension_walk_list(node.declarations, ctx, visitors, node);
  },
  VariableDeclarator: (node, ctx, visitors) => {
    extension_walk(node.id, ctx, visitors, node);
    extension_walk(node.init, ctx, visitors, node);
  },
  SpreadElement: (node, ctx, visitors) => {
    extension_walk(node.argument, ctx, visitors, node);
  },

  BlockStatement: (node, ctx, visitors) => {
    extension_walk_list(node.body, ctx, visitors, node);
  },
  ExpressionStatement: (node, ctx, visitors) => {
    extension_walk(node.expression, ctx, visitors, node);
  },
  IfStatement: extension_ternary,
  ForStatement: (node, ctx, visitors) => {
    extension_walk(node.init, ctx, visitors, node);
    extension_walk(node.test, ctx, visitors, node);
    extension_walk(node.update, ctx, visitors, node);
    extension_walk(node.body, ctx, visitors, node);
  },
  WhileStatement: (node, ctx, visitors) => {
    extension_walk(node.test, ctx, visitors, node);
    extension_walk(node.body, ctx, visitors, node);
  },
  DoWhileStatement: (node, ctx, visitors) => {
    extension_walk(node.body, ctx, visitors, node);
    extension_walk(node.test, ctx, visitors, node);
  },
  SwitchStatement: (node, ctx, visitors) => {
    extension_walk(node.discriminant, ctx, visitors, node);
    extension_walk_list(node.cases, ctx, visitors, node);
  },
  SwitchCase: (node, ctx, visitors) => {
    if (node.test) extension_walk(node.test, ctx, visitors, node);
    extension_walk_list(node.consequent, ctx, visitors, node);
  },
  ReturnStatement: extension_unary,

  Program: (node, ctx, visitors) => {
    extension_walk(node.body[0], ctx, visitors, node);
  }
};
;// ../../node_modules/arquero/src/expression/ast/clean.js


function extension_strip(node) {
  delete node.start;
  delete node.end;
  delete node.optional;
}

function extension_stripMember(node) {
  extension_strip(node);
  delete node.object;
  delete node.property;
  delete node.computed;
  if (!node.table) delete node.table;
}

/* harmony default export */ function extension_clean(ast) {
  extension_walk(ast, null, {
    Column: extension_stripMember,
    Constant: extension_stripMember,
    Default: extension_strip
  });
  return ast;
}
;// ../../node_modules/arquero/src/expression/ast/util.js


function extension_is(type, node) {
  return node && node.type === type;
}

function extension_isFunctionExpression(node) {
  return extension_is(extension_FunctionExpression, node)
    || extension_is(extension_ArrowFunctionExpression, node);
}
;// ../../node_modules/arquero/src/util/to-function.js


/* harmony default export */ function extension_to_function(value) {
  return extension_util_is_function(value) ? value : () => value;
}
;// ../../node_modules/arquero/src/expression/parse-escape.js





const extension_ERROR_ESC_AGGRONLY = 'Escaped functions are not valid as rollup or pivot values.';

/* harmony default export */ function extension_parse_escape(ctx, spec, params) {
  if (ctx.aggronly) extension_util_error(extension_ERROR_ESC_AGGRONLY);

  // generate escaped function invocation code
  const code = '(row,data)=>fn('
    + extension_rowObjectCode(ctx.table.columnNames())
    + ',$)';

  return { escape: extension_expression_compile.escape(code, extension_to_function(spec.expr), params) };
}
;// ../../node_modules/acorn/dist/acorn.mjs
// This file was generated. Do not modify manually!
var extension_astralIdentifierCodes = [509, 0, 227, 0, 150, 4, 294, 9, 1368, 2, 2, 1, 6, 3, 41, 2, 5, 0, 166, 1, 574, 3, 9, 9, 7, 9, 32, 4, 318, 1, 80, 3, 71, 10, 50, 3, 123, 2, 54, 14, 32, 10, 3, 1, 11, 3, 46, 10, 8, 0, 46, 9, 7, 2, 37, 13, 2, 9, 6, 1, 45, 0, 13, 2, 49, 13, 9, 3, 2, 11, 83, 11, 7, 0, 3, 0, 158, 11, 6, 9, 7, 3, 56, 1, 2, 6, 3, 1, 3, 2, 10, 0, 11, 1, 3, 6, 4, 4, 68, 8, 2, 0, 3, 0, 2, 3, 2, 4, 2, 0, 15, 1, 83, 17, 10, 9, 5, 0, 82, 19, 13, 9, 214, 6, 3, 8, 28, 1, 83, 16, 16, 9, 82, 12, 9, 9, 7, 19, 58, 14, 5, 9, 243, 14, 166, 9, 71, 5, 2, 1, 3, 3, 2, 0, 2, 1, 13, 9, 120, 6, 3, 6, 4, 0, 29, 9, 41, 6, 2, 3, 9, 0, 10, 10, 47, 15, 343, 9, 54, 7, 2, 7, 17, 9, 57, 21, 2, 13, 123, 5, 4, 0, 2, 1, 2, 6, 2, 0, 9, 9, 49, 4, 2, 1, 2, 4, 9, 9, 330, 3, 10, 1, 2, 0, 49, 6, 4, 4, 14, 10, 5350, 0, 7, 14, 11465, 27, 2343, 9, 87, 9, 39, 4, 60, 6, 26, 9, 535, 9, 470, 0, 2, 54, 8, 3, 82, 0, 12, 1, 19628, 1, 4178, 9, 519, 45, 3, 22, 543, 4, 4, 5, 9, 7, 3, 6, 31, 3, 149, 2, 1418, 49, 513, 54, 5, 49, 9, 0, 15, 0, 23, 4, 2, 14, 1361, 6, 2, 16, 3, 6, 2, 1, 2, 4, 101, 0, 161, 6, 10, 9, 357, 0, 62, 13, 499, 13, 245, 1, 2, 9, 726, 6, 110, 6, 6, 9, 4759, 9, 787719, 239];

// This file was generated. Do not modify manually!
var extension_astralIdentifierStartCodes = [0, 11, 2, 25, 2, 18, 2, 1, 2, 14, 3, 13, 35, 122, 70, 52, 268, 28, 4, 48, 48, 31, 14, 29, 6, 37, 11, 29, 3, 35, 5, 7, 2, 4, 43, 157, 19, 35, 5, 35, 5, 39, 9, 51, 13, 10, 2, 14, 2, 6, 2, 1, 2, 10, 2, 14, 2, 6, 2, 1, 4, 51, 13, 310, 10, 21, 11, 7, 25, 5, 2, 41, 2, 8, 70, 5, 3, 0, 2, 43, 2, 1, 4, 0, 3, 22, 11, 22, 10, 30, 66, 18, 2, 1, 11, 21, 11, 25, 71, 55, 7, 1, 65, 0, 16, 3, 2, 2, 2, 28, 43, 28, 4, 28, 36, 7, 2, 27, 28, 53, 11, 21, 11, 18, 14, 17, 111, 72, 56, 50, 14, 50, 14, 35, 39, 27, 10, 22, 251, 41, 7, 1, 17, 2, 60, 28, 11, 0, 9, 21, 43, 17, 47, 20, 28, 22, 13, 52, 58, 1, 3, 0, 14, 44, 33, 24, 27, 35, 30, 0, 3, 0, 9, 34, 4, 0, 13, 47, 15, 3, 22, 0, 2, 0, 36, 17, 2, 24, 20, 1, 64, 6, 2, 0, 2, 3, 2, 14, 2, 9, 8, 46, 39, 7, 3, 1, 3, 21, 2, 6, 2, 1, 2, 4, 4, 0, 19, 0, 13, 4, 31, 9, 2, 0, 3, 0, 2, 37, 2, 0, 26, 0, 2, 0, 45, 52, 19, 3, 21, 2, 31, 47, 21, 1, 2, 0, 185, 46, 42, 3, 37, 47, 21, 0, 60, 42, 14, 0, 72, 26, 38, 6, 186, 43, 117, 63, 32, 7, 3, 0, 3, 7, 2, 1, 2, 23, 16, 0, 2, 0, 95, 7, 3, 38, 17, 0, 2, 0, 29, 0, 11, 39, 8, 0, 22, 0, 12, 45, 20, 0, 19, 72, 200, 32, 32, 8, 2, 36, 18, 0, 50, 29, 113, 6, 2, 1, 2, 37, 22, 0, 26, 5, 2, 1, 2, 31, 15, 0, 328, 18, 16, 0, 2, 12, 2, 33, 125, 0, 80, 921, 103, 110, 18, 195, 2637, 96, 16, 1071, 18, 5, 26, 3994, 6, 582, 6842, 29, 1763, 568, 8, 30, 18, 78, 18, 29, 19, 47, 17, 3, 32, 20, 6, 18, 433, 44, 212, 63, 129, 74, 6, 0, 67, 12, 65, 1, 2, 0, 29, 6135, 9, 1237, 42, 9, 8936, 3, 2, 6, 2, 1, 2, 290, 16, 0, 30, 2, 3, 0, 15, 3, 9, 395, 2309, 106, 6, 12, 4, 8, 8, 9, 5991, 84, 2, 70, 2, 1, 3, 0, 3, 1, 3, 3, 2, 11, 2, 0, 2, 6, 2, 64, 2, 3, 3, 7, 2, 6, 2, 27, 2, 3, 2, 4, 2, 0, 4, 6, 2, 339, 3, 24, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 7, 1845, 30, 7, 5, 262, 61, 147, 44, 11, 6, 17, 0, 322, 29, 19, 43, 485, 27, 229, 29, 3, 0, 496, 6, 2, 3, 2, 1, 2, 14, 2, 196, 60, 67, 8, 0, 1205, 3, 2, 26, 2, 1, 2, 0, 3, 0, 2, 9, 2, 3, 2, 0, 2, 0, 7, 0, 5, 0, 2, 0, 2, 0, 2, 2, 2, 1, 2, 0, 3, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 1, 2, 0, 3, 3, 2, 6, 2, 3, 2, 3, 2, 0, 2, 9, 2, 16, 6, 2, 2, 4, 2, 16, 4421, 42719, 33, 4153, 7, 221, 3, 5761, 15, 7472, 16, 621, 2467, 541, 1507, 4938, 6, 4191];

// This file was generated. Do not modify manually!
var extension_nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u0897-\u089f\u08ca-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b55-\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3c\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0cf3\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d81-\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ece\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1715\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u180f-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1abf-\u1ace\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1dff\u200c\u200d\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\u30fb\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua82c\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f\uff65";

// This file was generated. Do not modify manually!
var extension_nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u0870-\u0887\u0889-\u088e\u08a0-\u08c9\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c5d\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cdd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d04-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u1711\u171f-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4c\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c8a\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31bf\u31f0-\u31ff\u3400-\u4dbf\u4e00-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7cd\ua7d0\ua7d1\ua7d3\ua7d5-\ua7dc\ua7f2-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab69\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc";

// These are a run-length and offset encoded representation of the
// >0xffff code points that are a valid part of identifiers. The
// offset starts at 0x10000, and each pair of numbers represents an
// offset to the next range, and then a size of the range.

// Reserved word lists for various dialects of the language

var extension_reservedWords = {
  3: "abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile",
  5: "class enum extends super const export import",
  6: "enum",
  strict: "implements interface let package private protected public static yield",
  strictBind: "eval arguments"
};

// And the keywords

var extension_ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this";

var extension_keywords$1 = {
  5: extension_ecma5AndLessKeywords,
  "5module": extension_ecma5AndLessKeywords + " export import",
  6: extension_ecma5AndLessKeywords + " const class extends export import super"
};

var extension_keywordRelationalOperator = /^in(stanceof)?$/;

// ## Character categories

var extension_nonASCIIidentifierStart = new RegExp("[" + extension_nonASCIIidentifierStartChars + "]");
var extension_nonASCIIidentifier = new RegExp("[" + extension_nonASCIIidentifierStartChars + extension_nonASCIIidentifierChars + "]");

// This has a complexity linear to the value of the code. The
// assumption is that looking up astral identifier characters is
// rare.
function extension_isInAstralSet(code, set) {
  var pos = 0x10000;
  for (var i = 0; i < set.length; i += 2) {
    pos += set[i];
    if (pos > code) { return false }
    pos += set[i + 1];
    if (pos >= code) { return true }
  }
  return false
}

// Test whether a given character code starts an identifier.

function extension_isIdentifierStart(code, astral) {
  if (code < 65) { return code === 36 }
  if (code < 91) { return true }
  if (code < 97) { return code === 95 }
  if (code < 123) { return true }
  if (code <= 0xffff) { return code >= 0xaa && extension_nonASCIIidentifierStart.test(String.fromCharCode(code)) }
  if (astral === false) { return false }
  return extension_isInAstralSet(code, extension_astralIdentifierStartCodes)
}

// Test whether a given character is part of an identifier.

function extension_isIdentifierChar(code, astral) {
  if (code < 48) { return code === 36 }
  if (code < 58) { return true }
  if (code < 65) { return false }
  if (code < 91) { return true }
  if (code < 97) { return code === 95 }
  if (code < 123) { return true }
  if (code <= 0xffff) { return code >= 0xaa && extension_nonASCIIidentifier.test(String.fromCharCode(code)) }
  if (astral === false) { return false }
  return extension_isInAstralSet(code, extension_astralIdentifierStartCodes) || extension_isInAstralSet(code, extension_astralIdentifierCodes)
}

// ## Token types

// The assignment of fine-grained, information-carrying type objects
// allows the tokenizer to store the information it has about a
// token in a way that is very cheap for the parser to look up.

// All token type variables start with an underscore, to make them
// easy to recognize.

// The `beforeExpr` property is used to disambiguate between regular
// expressions and divisions. It is set on all token types that can
// be followed by an expression (thus, a slash after them would be a
// regular expression).
//
// The `startsExpr` property is used to check if the token ends a
// `yield` expression. It is set on all token types that either can
// directly start an expression (like a quotation mark) or can
// continue an expression (like the body of a string).
//
// `isLoop` marks a keyword as starting a loop, which is important
// to know when parsing a label, in order to allow or disallow
// continue jumps to that label.

var extension_TokenType = function TokenType(label, conf) {
  if ( conf === void 0 ) conf = {};

  this.label = label;
  this.keyword = conf.keyword;
  this.beforeExpr = !!conf.beforeExpr;
  this.startsExpr = !!conf.startsExpr;
  this.isLoop = !!conf.isLoop;
  this.isAssign = !!conf.isAssign;
  this.prefix = !!conf.prefix;
  this.postfix = !!conf.postfix;
  this.binop = conf.binop || null;
  this.updateContext = null;
};

function extension_binop(name, prec) {
  return new extension_TokenType(name, {beforeExpr: true, binop: prec})
}
var extension_beforeExpr = {beforeExpr: true}, extension_startsExpr = {startsExpr: true};

// Map keyword names to token types.

var extension_keywords = {};

// Succinct definitions of keyword token types
function extension_kw(name, options) {
  if ( options === void 0 ) options = {};

  options.keyword = name;
  return extension_keywords[name] = new extension_TokenType(name, options)
}

var extension_types$1 = {
  num: new extension_TokenType("num", extension_startsExpr),
  regexp: new extension_TokenType("regexp", extension_startsExpr),
  string: new extension_TokenType("string", extension_startsExpr),
  name: new extension_TokenType("name", extension_startsExpr),
  privateId: new extension_TokenType("privateId", extension_startsExpr),
  eof: new extension_TokenType("eof"),

  // Punctuation token types.
  bracketL: new extension_TokenType("[", {beforeExpr: true, startsExpr: true}),
  bracketR: new extension_TokenType("]"),
  braceL: new extension_TokenType("{", {beforeExpr: true, startsExpr: true}),
  braceR: new extension_TokenType("}"),
  parenL: new extension_TokenType("(", {beforeExpr: true, startsExpr: true}),
  parenR: new extension_TokenType(")"),
  comma: new extension_TokenType(",", extension_beforeExpr),
  semi: new extension_TokenType(";", extension_beforeExpr),
  colon: new extension_TokenType(":", extension_beforeExpr),
  dot: new extension_TokenType("."),
  question: new extension_TokenType("?", extension_beforeExpr),
  questionDot: new extension_TokenType("?."),
  arrow: new extension_TokenType("=>", extension_beforeExpr),
  template: new extension_TokenType("template"),
  invalidTemplate: new extension_TokenType("invalidTemplate"),
  ellipsis: new extension_TokenType("...", extension_beforeExpr),
  backQuote: new extension_TokenType("`", extension_startsExpr),
  dollarBraceL: new extension_TokenType("${", {beforeExpr: true, startsExpr: true}),

  // Operators. These carry several kinds of properties to help the
  // parser use them properly (the presence of these properties is
  // what categorizes them as operators).
  //
  // `binop`, when present, specifies that this operator is a binary
  // operator, and will refer to its precedence.
  //
  // `prefix` and `postfix` mark the operator as a prefix or postfix
  // unary operator.
  //
  // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as
  // binary operators with a very low precedence, that should result
  // in AssignmentExpression nodes.

  eq: new extension_TokenType("=", {beforeExpr: true, isAssign: true}),
  assign: new extension_TokenType("_=", {beforeExpr: true, isAssign: true}),
  incDec: new extension_TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}),
  prefix: new extension_TokenType("!/~", {beforeExpr: true, prefix: true, startsExpr: true}),
  logicalOR: extension_binop("||", 1),
  logicalAND: extension_binop("&&", 2),
  bitwiseOR: extension_binop("|", 3),
  bitwiseXOR: extension_binop("^", 4),
  bitwiseAND: extension_binop("&", 5),
  equality: extension_binop("==/!=/===/!==", 6),
  relational: extension_binop("</>/<=/>=", 7),
  bitShift: extension_binop("<</>>/>>>", 8),
  plusMin: new extension_TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}),
  modulo: extension_binop("%", 10),
  star: extension_binop("*", 10),
  slash: extension_binop("/", 10),
  starstar: new extension_TokenType("**", {beforeExpr: true}),
  coalesce: extension_binop("??", 1),

  // Keyword token types.
  _break: extension_kw("break"),
  _case: extension_kw("case", extension_beforeExpr),
  _catch: extension_kw("catch"),
  _continue: extension_kw("continue"),
  _debugger: extension_kw("debugger"),
  _default: extension_kw("default", extension_beforeExpr),
  _do: extension_kw("do", {isLoop: true, beforeExpr: true}),
  _else: extension_kw("else", extension_beforeExpr),
  _finally: extension_kw("finally"),
  _for: extension_kw("for", {isLoop: true}),
  _function: extension_kw("function", extension_startsExpr),
  _if: extension_kw("if"),
  _return: extension_kw("return", extension_beforeExpr),
  _switch: extension_kw("switch"),
  _throw: extension_kw("throw", extension_beforeExpr),
  _try: extension_kw("try"),
  _var: extension_kw("var"),
  _const: extension_kw("const"),
  _while: extension_kw("while", {isLoop: true}),
  _with: extension_kw("with"),
  _new: extension_kw("new", {beforeExpr: true, startsExpr: true}),
  _this: extension_kw("this", extension_startsExpr),
  _super: extension_kw("super", extension_startsExpr),
  _class: extension_kw("class", extension_startsExpr),
  _extends: extension_kw("extends", extension_beforeExpr),
  _export: extension_kw("export"),
  _import: extension_kw("import", extension_startsExpr),
  _null: extension_kw("null", extension_startsExpr),
  _true: extension_kw("true", extension_startsExpr),
  _false: extension_kw("false", extension_startsExpr),
  _in: extension_kw("in", {beforeExpr: true, binop: 7}),
  _instanceof: extension_kw("instanceof", {beforeExpr: true, binop: 7}),
  _typeof: extension_kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}),
  _void: extension_kw("void", {beforeExpr: true, prefix: true, startsExpr: true}),
  _delete: extension_kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
};

// Matches a whole line break (where CRLF is considered a single
// line break). Used to count lines.

var extension_lineBreak = /\r\n?|\n|\u2028|\u2029/;
var extension_lineBreakG = new RegExp(extension_lineBreak.source, "g");

function extension_isNewLine(code) {
  return code === 10 || code === 13 || code === 0x2028 || code === 0x2029
}

function extension_nextLineBreak(code, from, end) {
  if ( end === void 0 ) end = code.length;

  for (var i = from; i < end; i++) {
    var next = code.charCodeAt(i);
    if (extension_isNewLine(next))
      { return i < end - 1 && next === 13 && code.charCodeAt(i + 1) === 10 ? i + 2 : i + 1 }
  }
  return -1
}

var extension_nonASCIIwhitespace = /[\u1680\u2000-\u200a\u202f\u205f\u3000\ufeff]/;

var extension_skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;

var extension_acorn_ref = Object.prototype;
var extension_acorn_hasOwnProperty = extension_acorn_ref.hasOwnProperty;
var extension_acorn_toString = extension_acorn_ref.toString;

var extension_hasOwn = Object.hasOwn || (function (obj, propName) { return (
  extension_acorn_hasOwnProperty.call(obj, propName)
); });

var extension_acorn_isArray = Array.isArray || (function (obj) { return (
  extension_acorn_toString.call(obj) === "[object Array]"
); });

var extension_regexpCache = Object.create(null);

function extension_wordsRegexp(words) {
  return extension_regexpCache[words] || (extension_regexpCache[words] = new RegExp("^(?:" + words.replace(/ /g, "|") + ")$"))
}

function extension_codePointToString(code) {
  // UTF-16 Decoding
  if (code <= 0xFFFF) { return String.fromCharCode(code) }
  code -= 0x10000;
  return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00)
}

var extension_loneSurrogate = /(?:[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF])/;

// These are used when `options.locations` is on, for the
// `startLoc` and `endLoc` properties.

var extension_Position = function Position(line, col) {
  this.line = line;
  this.column = col;
};

extension_Position.prototype.offset = function offset (n) {
  return new extension_Position(this.line, this.column + n)
};

var extension_SourceLocation = function SourceLocation(p, start, end) {
  this.start = start;
  this.end = end;
  if (p.sourceFile !== null) { this.source = p.sourceFile; }
};

// The `getLineInfo` function is mostly useful when the
// `locations` option is off (for performance reasons) and you
// want to find the line/column position for a given character
// offset. `input` should be the code string that the offset refers
// into.

function extension_getLineInfo(input, offset) {
  for (var line = 1, cur = 0;;) {
    var nextBreak = extension_nextLineBreak(input, cur, offset);
    if (nextBreak < 0) { return new extension_Position(line, offset - cur) }
    ++line;
    cur = nextBreak;
  }
}

// A second argument must be given to configure the parser process.
// These options are recognized (only `ecmaVersion` is required):

var extension_defaultOptions = {
  // `ecmaVersion` indicates the ECMAScript version to parse. Must be
  // either 3, 5, 6 (or 2015), 7 (2016), 8 (2017), 9 (2018), 10
  // (2019), 11 (2020), 12 (2021), 13 (2022), 14 (2023), or `"latest"`
  // (the latest version the library supports). This influences
  // support for strict mode, the set of reserved words, and support
  // for new syntax features.
  ecmaVersion: null,
  // `sourceType` indicates the mode the code should be parsed in.
  // Can be either `"script"` or `"module"`. This influences global
  // strict mode and parsing of `import` and `export` declarations.
  sourceType: "script",
  // `onInsertedSemicolon` can be a callback that will be called when
  // a semicolon is automatically inserted. It will be passed the
  // position of the inserted semicolon as an offset, and if
  // `locations` is enabled, it is given the location as a `{line,
  // column}` object as second argument.
  onInsertedSemicolon: null,
  // `onTrailingComma` is similar to `onInsertedSemicolon`, but for
  // trailing commas.
  onTrailingComma: null,
  // By default, reserved words are only enforced if ecmaVersion >= 5.
  // Set `allowReserved` to a boolean value to explicitly turn this on
  // an off. When this option has the value "never", reserved words
  // and keywords can also not be used as property names.
  allowReserved: null,
  // When enabled, a return at the top level is not considered an
  // error.
  allowReturnOutsideFunction: false,
  // When enabled, import/export statements are not constrained to
  // appearing at the top of the program, and an import.meta expression
  // in a script isn't considered an error.
  allowImportExportEverywhere: false,
  // By default, await identifiers are allowed to appear at the top-level scope only if ecmaVersion >= 2022.
  // When enabled, await identifiers are allowed to appear at the top-level scope,
  // but they are still not allowed in non-async functions.
  allowAwaitOutsideFunction: null,
  // When enabled, super identifiers are not constrained to
  // appearing in methods and do not raise an error when they appear elsewhere.
  allowSuperOutsideMethod: null,
  // When enabled, hashbang directive in the beginning of file is
  // allowed and treated as a line comment. Enabled by default when
  // `ecmaVersion` >= 2023.
  allowHashBang: false,
  // By default, the parser will verify that private properties are
  // only used in places where they are valid and have been declared.
  // Set this to false to turn such checks off.
  checkPrivateFields: true,
  // When `locations` is on, `loc` properties holding objects with
  // `start` and `end` properties in `{line, column}` form (with
  // line being 1-based and column 0-based) will be attached to the
  // nodes.
  locations: false,
  // A function can be passed as `onToken` option, which will
  // cause Acorn to call that function with object in the same
  // format as tokens returned from `tokenizer().getToken()`. Note
  // that you are not allowed to call the parser from the
  // callback—that will corrupt its internal state.
  onToken: null,
  // A function can be passed as `onComment` option, which will
  // cause Acorn to call that function with `(block, text, start,
  // end)` parameters whenever a comment is skipped. `block` is a
  // boolean indicating whether this is a block (`/* */`) comment,
  // `text` is the content of the comment, and `start` and `end` are
  // character offsets that denote the start and end of the comment.
  // When the `locations` option is on, two more parameters are
  // passed, the full `{line, column}` locations of the start and
  // end of the comments. Note that you are not allowed to call the
  // parser from the callback—that will corrupt its internal state.
  // When this option has an array as value, objects representing the
  // comments are pushed to it.
  onComment: null,
  // Nodes have their start and end characters offsets recorded in
  // `start` and `end` properties (directly on the node, rather than
  // the `loc` object, which holds line/column data. To also add a
  // [semi-standardized][range] `range` property holding a `[start,
  // end]` array with the same numbers, set the `ranges` option to
  // `true`.
  //
  // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
  ranges: false,
  // It is possible to parse multiple files into a single AST by
  // passing the tree produced by parsing the first file as
  // `program` option in subsequent parses. This will add the
  // toplevel forms of the parsed file to the `Program` (top) node
  // of an existing parse tree.
  program: null,
  // When `locations` is on, you can pass this to record the source
  // file in every node's `loc` object.
  sourceFile: null,
  // This value, if given, is stored in every node, whether
  // `locations` is on or off.
  directSourceFile: null,
  // When enabled, parenthesized expressions are represented by
  // (non-standard) ParenthesizedExpression nodes
  preserveParens: false
};

// Interpret and default an options object

var extension_warnedAboutEcmaVersion = false;

function extension_getOptions(opts) {
  var options = {};

  for (var opt in extension_defaultOptions)
    { options[opt] = opts && extension_hasOwn(opts, opt) ? opts[opt] : extension_defaultOptions[opt]; }

  if (options.ecmaVersion === "latest") {
    options.ecmaVersion = 1e8;
  } else if (options.ecmaVersion == null) {
    if (!extension_warnedAboutEcmaVersion && typeof console === "object" && console.warn) {
      extension_warnedAboutEcmaVersion = true;
      console.warn("Since Acorn 8.0.0, options.ecmaVersion is required.\nDefaulting to 2020, but this will stop working in the future.");
    }
    options.ecmaVersion = 11;
  } else if (options.ecmaVersion >= 2015) {
    options.ecmaVersion -= 2009;
  }

  if (options.allowReserved == null)
    { options.allowReserved = options.ecmaVersion < 5; }

  if (!opts || opts.allowHashBang == null)
    { options.allowHashBang = options.ecmaVersion >= 14; }

  if (extension_acorn_isArray(options.onToken)) {
    var tokens = options.onToken;
    options.onToken = function (token) { return tokens.push(token); };
  }
  if (extension_acorn_isArray(options.onComment))
    { options.onComment = extension_pushComment(options, options.onComment); }

  return options
}

function extension_pushComment(options, array) {
  return function(block, text, start, end, startLoc, endLoc) {
    var comment = {
      type: block ? "Block" : "Line",
      value: text,
      start: start,
      end: end
    };
    if (options.locations)
      { comment.loc = new extension_SourceLocation(this, startLoc, endLoc); }
    if (options.ranges)
      { comment.range = [start, end]; }
    array.push(comment);
  }
}

// Each scope gets a bitset that may contain these flags
var
    extension_SCOPE_TOP = 1,
    extension_SCOPE_FUNCTION = 2,
    extension_SCOPE_ASYNC = 4,
    extension_SCOPE_GENERATOR = 8,
    extension_SCOPE_ARROW = 16,
    extension_SCOPE_SIMPLE_CATCH = 32,
    extension_SCOPE_SUPER = 64,
    extension_SCOPE_DIRECT_SUPER = 128,
    extension_SCOPE_CLASS_STATIC_BLOCK = 256,
    extension_SCOPE_VAR = extension_SCOPE_TOP | extension_SCOPE_FUNCTION | extension_SCOPE_CLASS_STATIC_BLOCK;

function extension_functionFlags(async, generator) {
  return extension_SCOPE_FUNCTION | (async ? extension_SCOPE_ASYNC : 0) | (generator ? extension_SCOPE_GENERATOR : 0)
}

// Used in checkLVal* and declareName to determine the type of a binding
var
    extension_BIND_NONE = 0, // Not a binding
    extension_BIND_VAR = 1, // Var-style binding
    extension_BIND_LEXICAL = 2, // Let- or const-style binding
    extension_BIND_FUNCTION = 3, // Function declaration
    extension_BIND_SIMPLE_CATCH = 4, // Simple (identifier pattern) catch binding
    extension_BIND_OUTSIDE = 5; // Special case for function names as bound inside the function

var extension_Parser = function Parser(options, input, startPos) {
  this.options = options = extension_getOptions(options);
  this.sourceFile = options.sourceFile;
  this.keywords = extension_wordsRegexp(extension_keywords$1[options.ecmaVersion >= 6 ? 6 : options.sourceType === "module" ? "5module" : 5]);
  var reserved = "";
  if (options.allowReserved !== true) {
    reserved = extension_reservedWords[options.ecmaVersion >= 6 ? 6 : options.ecmaVersion === 5 ? 5 : 3];
    if (options.sourceType === "module") { reserved += " await"; }
  }
  this.reservedWords = extension_wordsRegexp(reserved);
  var reservedStrict = (reserved ? reserved + " " : "") + extension_reservedWords.strict;
  this.reservedWordsStrict = extension_wordsRegexp(reservedStrict);
  this.reservedWordsStrictBind = extension_wordsRegexp(reservedStrict + " " + extension_reservedWords.strictBind);
  this.input = String(input);

  // Used to signal to callers of `readWord1` whether the word
  // contained any escape sequences. This is needed because words with
  // escape sequences must not be interpreted as keywords.
  this.containsEsc = false;

  // Set up token state

  // The current position of the tokenizer in the input.
  if (startPos) {
    this.pos = startPos;
    this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
    this.curLine = this.input.slice(0, this.lineStart).split(extension_lineBreak).length;
  } else {
    this.pos = this.lineStart = 0;
    this.curLine = 1;
  }

  // Properties of the current token:
  // Its type
  this.type = extension_types$1.eof;
  // For tokens that include more information than their type, the value
  this.value = null;
  // Its start and end offset
  this.start = this.end = this.pos;
  // And, if locations are used, the {line, column} object
  // corresponding to those offsets
  this.startLoc = this.endLoc = this.curPosition();

  // Position information for the previous token
  this.lastTokEndLoc = this.lastTokStartLoc = null;
  this.lastTokStart = this.lastTokEnd = this.pos;

  // The context stack is used to superficially track syntactic
  // context to predict whether a regular expression is allowed in a
  // given position.
  this.context = this.initialContext();
  this.exprAllowed = true;

  // Figure out if it's a module code.
  this.inModule = options.sourceType === "module";
  this.strict = this.inModule || this.strictDirective(this.pos);

  // Used to signify the start of a potential arrow function
  this.potentialArrowAt = -1;
  this.potentialArrowInForAwait = false;

  // Positions to delayed-check that yield/await does not exist in default parameters.
  this.yieldPos = this.awaitPos = this.awaitIdentPos = 0;
  // Labels in scope.
  this.labels = [];
  // Thus-far undefined exports.
  this.undefinedExports = Object.create(null);

  // If enabled, skip leading hashbang line.
  if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!")
    { this.skipLineComment(2); }

  // Scope tracking for duplicate variable names (see scope.js)
  this.scopeStack = [];
  this.enterScope(extension_SCOPE_TOP);

  // For RegExp validation
  this.regexpState = null;

  // The stack of private names.
  // Each element has two properties: 'declared' and 'used'.
  // When it exited from the outermost class definition, all used private names must be declared.
  this.privateNameStack = [];
};

var extension_prototypeAccessors = { inFunction: { configurable: true },inGenerator: { configurable: true },inAsync: { configurable: true },canAwait: { configurable: true },allowSuper: { configurable: true },allowDirectSuper: { configurable: true },treatFunctionsAsVar: { configurable: true },allowNewDotTarget: { configurable: true },inClassStaticBlock: { configurable: true } };

extension_Parser.prototype.parse = function parse () {
  var node = this.options.program || this.startNode();
  this.nextToken();
  return this.parseTopLevel(node)
};

extension_prototypeAccessors.inFunction.get = function () { return (this.currentVarScope().flags & extension_SCOPE_FUNCTION) > 0 };

extension_prototypeAccessors.inGenerator.get = function () { return (this.currentVarScope().flags & extension_SCOPE_GENERATOR) > 0 && !this.currentVarScope().inClassFieldInit };

extension_prototypeAccessors.inAsync.get = function () { return (this.currentVarScope().flags & extension_SCOPE_ASYNC) > 0 && !this.currentVarScope().inClassFieldInit };

extension_prototypeAccessors.canAwait.get = function () {
  for (var i = this.scopeStack.length - 1; i >= 0; i--) {
    var scope = this.scopeStack[i];
    if (scope.inClassFieldInit || scope.flags & extension_SCOPE_CLASS_STATIC_BLOCK) { return false }
    if (scope.flags & extension_SCOPE_FUNCTION) { return (scope.flags & extension_SCOPE_ASYNC) > 0 }
  }
  return (this.inModule && this.options.ecmaVersion >= 13) || this.options.allowAwaitOutsideFunction
};

extension_prototypeAccessors.allowSuper.get = function () {
  var ref = this.currentThisScope();
    var flags = ref.flags;
    var inClassFieldInit = ref.inClassFieldInit;
  return (flags & extension_SCOPE_SUPER) > 0 || inClassFieldInit || this.options.allowSuperOutsideMethod
};

extension_prototypeAccessors.allowDirectSuper.get = function () { return (this.currentThisScope().flags & extension_SCOPE_DIRECT_SUPER) > 0 };

extension_prototypeAccessors.treatFunctionsAsVar.get = function () { return this.treatFunctionsAsVarInScope(this.currentScope()) };

extension_prototypeAccessors.allowNewDotTarget.get = function () {
  var ref = this.currentThisScope();
    var flags = ref.flags;
    var inClassFieldInit = ref.inClassFieldInit;
  return (flags & (extension_SCOPE_FUNCTION | extension_SCOPE_CLASS_STATIC_BLOCK)) > 0 || inClassFieldInit
};

extension_prototypeAccessors.inClassStaticBlock.get = function () {
  return (this.currentVarScope().flags & extension_SCOPE_CLASS_STATIC_BLOCK) > 0
};

extension_Parser.extend = function extend () {
    var plugins = [], len = arguments.length;
    while ( len-- ) plugins[ len ] = arguments[ len ];

  var cls = this;
  for (var i = 0; i < plugins.length; i++) { cls = plugins[i](cls); }
  return cls
};

extension_Parser.parse = function parse (input, options) {
  return new this(options, input).parse()
};

extension_Parser.parseExpressionAt = function parseExpressionAt (input, pos, options) {
  var parser = new this(options, input, pos);
  parser.nextToken();
  return parser.parseExpression()
};

extension_Parser.tokenizer = function tokenizer (input, options) {
  return new this(options, input)
};

Object.defineProperties( extension_Parser.prototype, extension_prototypeAccessors );

var extension_pp$9 = extension_Parser.prototype;

// ## Parser utilities

var extension_literal = /^(?:'((?:\\[^]|[^'\\])*?)'|"((?:\\[^]|[^"\\])*?)")/;
extension_pp$9.strictDirective = function(start) {
  if (this.options.ecmaVersion < 5) { return false }
  for (;;) {
    // Try to find string literal.
    extension_skipWhiteSpace.lastIndex = start;
    start += extension_skipWhiteSpace.exec(this.input)[0].length;
    var match = extension_literal.exec(this.input.slice(start));
    if (!match) { return false }
    if ((match[1] || match[2]) === "use strict") {
      extension_skipWhiteSpace.lastIndex = start + match[0].length;
      var spaceAfter = extension_skipWhiteSpace.exec(this.input), end = spaceAfter.index + spaceAfter[0].length;
      var next = this.input.charAt(end);
      return next === ";" || next === "}" ||
        (extension_lineBreak.test(spaceAfter[0]) &&
         !(/[(`.[+\-/*%<>=,?^&]/.test(next) || next === "!" && this.input.charAt(end + 1) === "="))
    }
    start += match[0].length;

    // Skip semicolon, if any.
    extension_skipWhiteSpace.lastIndex = start;
    start += extension_skipWhiteSpace.exec(this.input)[0].length;
    if (this.input[start] === ";")
      { start++; }
  }
};

// Predicate that tests whether the next token is of the given
// type, and if yes, consumes it as a side effect.

extension_pp$9.eat = function(type) {
  if (this.type === type) {
    this.next();
    return true
  } else {
    return false
  }
};

// Tests whether parsed token is a contextual keyword.

extension_pp$9.isContextual = function(name) {
  return this.type === extension_types$1.name && this.value === name && !this.containsEsc
};

// Consumes contextual keyword if possible.

extension_pp$9.eatContextual = function(name) {
  if (!this.isContextual(name)) { return false }
  this.next();
  return true
};

// Asserts that following token is given contextual keyword.

extension_pp$9.expectContextual = function(name) {
  if (!this.eatContextual(name)) { this.unexpected(); }
};

// Test whether a semicolon can be inserted at the current position.

extension_pp$9.canInsertSemicolon = function() {
  return this.type === extension_types$1.eof ||
    this.type === extension_types$1.braceR ||
    extension_lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
};

extension_pp$9.insertSemicolon = function() {
  if (this.canInsertSemicolon()) {
    if (this.options.onInsertedSemicolon)
      { this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc); }
    return true
  }
};

// Consume a semicolon, or, failing that, see if we are allowed to
// pretend that there is a semicolon at this position.

extension_pp$9.semicolon = function() {
  if (!this.eat(extension_types$1.semi) && !this.insertSemicolon()) { this.unexpected(); }
};

extension_pp$9.afterTrailingComma = function(tokType, notNext) {
  if (this.type === tokType) {
    if (this.options.onTrailingComma)
      { this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc); }
    if (!notNext)
      { this.next(); }
    return true
  }
};

// Expect a token of a given type. If found, consume it, otherwise,
// raise an unexpected token error.

extension_pp$9.expect = function(type) {
  this.eat(type) || this.unexpected();
};

// Raise an unexpected token error.

extension_pp$9.unexpected = function(pos) {
  this.raise(pos != null ? pos : this.start, "Unexpected token");
};

var extension_DestructuringErrors = function DestructuringErrors() {
  this.shorthandAssign =
  this.trailingComma =
  this.parenthesizedAssign =
  this.parenthesizedBind =
  this.doubleProto =
    -1;
};

extension_pp$9.checkPatternErrors = function(refDestructuringErrors, isAssign) {
  if (!refDestructuringErrors) { return }
  if (refDestructuringErrors.trailingComma > -1)
    { this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element"); }
  var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind;
  if (parens > -1) { this.raiseRecoverable(parens, isAssign ? "Assigning to rvalue" : "Parenthesized pattern"); }
};

extension_pp$9.checkExpressionErrors = function(refDestructuringErrors, andThrow) {
  if (!refDestructuringErrors) { return false }
  var shorthandAssign = refDestructuringErrors.shorthandAssign;
  var doubleProto = refDestructuringErrors.doubleProto;
  if (!andThrow) { return shorthandAssign >= 0 || doubleProto >= 0 }
  if (shorthandAssign >= 0)
    { this.raise(shorthandAssign, "Shorthand property assignments are valid only in destructuring patterns"); }
  if (doubleProto >= 0)
    { this.raiseRecoverable(doubleProto, "Redefinition of __proto__ property"); }
};

extension_pp$9.checkYieldAwaitInDefaultParams = function() {
  if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))
    { this.raise(this.yieldPos, "Yield expression cannot be a default value"); }
  if (this.awaitPos)
    { this.raise(this.awaitPos, "Await expression cannot be a default value"); }
};

extension_pp$9.isSimpleAssignTarget = function(expr) {
  if (expr.type === "ParenthesizedExpression")
    { return this.isSimpleAssignTarget(expr.expression) }
  return expr.type === "Identifier" || expr.type === "MemberExpression"
};

var extension_pp$8 = extension_Parser.prototype;

// ### Statement parsing

// Parse a program. Initializes the parser, reads any number of
// statements, and wraps them in a Program node.  Optionally takes a
// `program` argument.  If present, the statements will be appended
// to its body instead of creating a new node.

extension_pp$8.parseTopLevel = function(node) {
  var exports = Object.create(null);
  if (!node.body) { node.body = []; }
  while (this.type !== extension_types$1.eof) {
    var stmt = this.parseStatement(null, true, exports);
    node.body.push(stmt);
  }
  if (this.inModule)
    { for (var i = 0, list = Object.keys(this.undefinedExports); i < list.length; i += 1)
      {
        var name = list[i];

        this.raiseRecoverable(this.undefinedExports[name].start, ("Export '" + name + "' is not defined"));
      } }
  this.adaptDirectivePrologue(node.body);
  this.next();
  node.sourceType = this.options.sourceType;
  return this.finishNode(node, "Program")
};

var extension_loopLabel = {kind: "loop"}, extension_switchLabel = {kind: "switch"};

extension_pp$8.isLet = function(context) {
  if (this.options.ecmaVersion < 6 || !this.isContextual("let")) { return false }
  extension_skipWhiteSpace.lastIndex = this.pos;
  var skip = extension_skipWhiteSpace.exec(this.input);
  var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
  // For ambiguous cases, determine if a LexicalDeclaration (or only a
  // Statement) is allowed here. If context is not empty then only a Statement
  // is allowed. However, `let [` is an explicit negative lookahead for
  // ExpressionStatement, so special-case it first.
  if (nextCh === 91 || nextCh === 92) { return true } // '[', '\'
  if (context) { return false }

  if (nextCh === 123 || nextCh > 0xd7ff && nextCh < 0xdc00) { return true } // '{', astral
  if (extension_isIdentifierStart(nextCh, true)) {
    var pos = next + 1;
    while (extension_isIdentifierChar(nextCh = this.input.charCodeAt(pos), true)) { ++pos; }
    if (nextCh === 92 || nextCh > 0xd7ff && nextCh < 0xdc00) { return true }
    var ident = this.input.slice(next, pos);
    if (!extension_keywordRelationalOperator.test(ident)) { return true }
  }
  return false
};

// check 'async [no LineTerminator here] function'
// - 'async /*foo*/ function' is OK.
// - 'async /*\n*/ function' is invalid.
extension_pp$8.isAsyncFunction = function() {
  if (this.options.ecmaVersion < 8 || !this.isContextual("async"))
    { return false }

  extension_skipWhiteSpace.lastIndex = this.pos;
  var skip = extension_skipWhiteSpace.exec(this.input);
  var next = this.pos + skip[0].length, after;
  return !extension_lineBreak.test(this.input.slice(this.pos, next)) &&
    this.input.slice(next, next + 8) === "function" &&
    (next + 8 === this.input.length ||
     !(extension_isIdentifierChar(after = this.input.charCodeAt(next + 8)) || after > 0xd7ff && after < 0xdc00))
};

// Parse a single statement.
//
// If expecting a statement and finding a slash operator, parse a
// regular expression literal. This is to handle cases like
// `if (foo) /blah/.exec(foo)`, where looking at the previous token
// does not help.

extension_pp$8.parseStatement = function(context, topLevel, exports) {
  var starttype = this.type, node = this.startNode(), kind;

  if (this.isLet(context)) {
    starttype = extension_types$1._var;
    kind = "let";
  }

  // Most types of statements are recognized by the keyword they
  // start with. Many are trivial to parse, some require a bit of
  // complexity.

  switch (starttype) {
  case extension_types$1._break: case extension_types$1._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
  case extension_types$1._debugger: return this.parseDebuggerStatement(node)
  case extension_types$1._do: return this.parseDoStatement(node)
  case extension_types$1._for: return this.parseForStatement(node)
  case extension_types$1._function:
    // Function as sole body of either an if statement or a labeled statement
    // works, but not when it is part of a labeled statement that is the sole
    // body of an if statement.
    if ((context && (this.strict || context !== "if" && context !== "label")) && this.options.ecmaVersion >= 6) { this.unexpected(); }
    return this.parseFunctionStatement(node, false, !context)
  case extension_types$1._class:
    if (context) { this.unexpected(); }
    return this.parseClass(node, true)
  case extension_types$1._if: return this.parseIfStatement(node)
  case extension_types$1._return: return this.parseReturnStatement(node)
  case extension_types$1._switch: return this.parseSwitchStatement(node)
  case extension_types$1._throw: return this.parseThrowStatement(node)
  case extension_types$1._try: return this.parseTryStatement(node)
  case extension_types$1._const: case extension_types$1._var:
    kind = kind || this.value;
    if (context && kind !== "var") { this.unexpected(); }
    return this.parseVarStatement(node, kind)
  case extension_types$1._while: return this.parseWhileStatement(node)
  case extension_types$1._with: return this.parseWithStatement(node)
  case extension_types$1.braceL: return this.parseBlock(true, node)
  case extension_types$1.semi: return this.parseEmptyStatement(node)
  case extension_types$1._export:
  case extension_types$1._import:
    if (this.options.ecmaVersion > 10 && starttype === extension_types$1._import) {
      extension_skipWhiteSpace.lastIndex = this.pos;
      var skip = extension_skipWhiteSpace.exec(this.input);
      var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
      if (nextCh === 40 || nextCh === 46) // '(' or '.'
        { return this.parseExpressionStatement(node, this.parseExpression()) }
    }

    if (!this.options.allowImportExportEverywhere) {
      if (!topLevel)
        { this.raise(this.start, "'import' and 'export' may only appear at the top level"); }
      if (!this.inModule)
        { this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'"); }
    }
    return starttype === extension_types$1._import ? this.parseImport(node) : this.parseExport(node, exports)

    // If the statement does not start with a statement keyword or a
    // brace, it's an ExpressionStatement or LabeledStatement. We
    // simply start parsing an expression, and afterwards, if the
    // next token is a colon and the expression was a simple
    // Identifier node, we switch to interpreting it as a label.
  default:
    if (this.isAsyncFunction()) {
      if (context) { this.unexpected(); }
      this.next();
      return this.parseFunctionStatement(node, true, !context)
    }

    var maybeName = this.value, expr = this.parseExpression();
    if (starttype === extension_types$1.name && expr.type === "Identifier" && this.eat(extension_types$1.colon))
      { return this.parseLabeledStatement(node, maybeName, expr, context) }
    else { return this.parseExpressionStatement(node, expr) }
  }
};

extension_pp$8.parseBreakContinueStatement = function(node, keyword) {
  var isBreak = keyword === "break";
  this.next();
  if (this.eat(extension_types$1.semi) || this.insertSemicolon()) { node.label = null; }
  else if (this.type !== extension_types$1.name) { this.unexpected(); }
  else {
    node.label = this.parseIdent();
    this.semicolon();
  }

  // Verify that there is an actual destination to break or
  // continue to.
  var i = 0;
  for (; i < this.labels.length; ++i) {
    var lab = this.labels[i];
    if (node.label == null || lab.name === node.label.name) {
      if (lab.kind != null && (isBreak || lab.kind === "loop")) { break }
      if (node.label && isBreak) { break }
    }
  }
  if (i === this.labels.length) { this.raise(node.start, "Unsyntactic " + keyword); }
  return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
};

extension_pp$8.parseDebuggerStatement = function(node) {
  this.next();
  this.semicolon();
  return this.finishNode(node, "DebuggerStatement")
};

extension_pp$8.parseDoStatement = function(node) {
  this.next();
  this.labels.push(extension_loopLabel);
  node.body = this.parseStatement("do");
  this.labels.pop();
  this.expect(extension_types$1._while);
  node.test = this.parseParenExpression();
  if (this.options.ecmaVersion >= 6)
    { this.eat(extension_types$1.semi); }
  else
    { this.semicolon(); }
  return this.finishNode(node, "DoWhileStatement")
};

// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
// loop is non-trivial. Basically, we have to parse the init `var`
// statement or expression, disallowing the `in` operator (see
// the second parameter to `parseExpression`), and then check
// whether the next token is `in` or `of`. When there is no init
// part (semicolon immediately after the opening parenthesis), it
// is a regular `for` loop.

extension_pp$8.parseForStatement = function(node) {
  this.next();
  var awaitAt = (this.options.ecmaVersion >= 9 && this.canAwait && this.eatContextual("await")) ? this.lastTokStart : -1;
  this.labels.push(extension_loopLabel);
  this.enterScope(0);
  this.expect(extension_types$1.parenL);
  if (this.type === extension_types$1.semi) {
    if (awaitAt > -1) { this.unexpected(awaitAt); }
    return this.parseFor(node, null)
  }
  var isLet = this.isLet();
  if (this.type === extension_types$1._var || this.type === extension_types$1._const || isLet) {
    var init$1 = this.startNode(), kind = isLet ? "let" : this.value;
    this.next();
    this.parseVar(init$1, true, kind);
    this.finishNode(init$1, "VariableDeclaration");
    if ((this.type === extension_types$1._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1) {
      if (this.options.ecmaVersion >= 9) {
        if (this.type === extension_types$1._in) {
          if (awaitAt > -1) { this.unexpected(awaitAt); }
        } else { node.await = awaitAt > -1; }
      }
      return this.parseForIn(node, init$1)
    }
    if (awaitAt > -1) { this.unexpected(awaitAt); }
    return this.parseFor(node, init$1)
  }
  var startsWithLet = this.isContextual("let"), isForOf = false;
  var containsEsc = this.containsEsc;
  var refDestructuringErrors = new extension_DestructuringErrors;
  var initPos = this.start;
  var init = awaitAt > -1
    ? this.parseExprSubscripts(refDestructuringErrors, "await")
    : this.parseExpression(true, refDestructuringErrors);
  if (this.type === extension_types$1._in || (isForOf = this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
    if (awaitAt > -1) { // implies `ecmaVersion >= 9` (see declaration of awaitAt)
      if (this.type === extension_types$1._in) { this.unexpected(awaitAt); }
      node.await = true;
    } else if (isForOf && this.options.ecmaVersion >= 8) {
      if (init.start === initPos && !containsEsc && init.type === "Identifier" && init.name === "async") { this.unexpected(); }
      else if (this.options.ecmaVersion >= 9) { node.await = false; }
    }
    if (startsWithLet && isForOf) { this.raise(init.start, "The left-hand side of a for-of loop may not start with 'let'."); }
    this.toAssignable(init, false, refDestructuringErrors);
    this.checkLValPattern(init);
    return this.parseForIn(node, init)
  } else {
    this.checkExpressionErrors(refDestructuringErrors, true);
  }
  if (awaitAt > -1) { this.unexpected(awaitAt); }
  return this.parseFor(node, init)
};

extension_pp$8.parseFunctionStatement = function(node, isAsync, declarationPosition) {
  this.next();
  return this.parseFunction(node, extension_FUNC_STATEMENT | (declarationPosition ? 0 : extension_FUNC_HANGING_STATEMENT), false, isAsync)
};

extension_pp$8.parseIfStatement = function(node) {
  this.next();
  node.test = this.parseParenExpression();
  // allow function declarations in branches, but only in non-strict mode
  node.consequent = this.parseStatement("if");
  node.alternate = this.eat(extension_types$1._else) ? this.parseStatement("if") : null;
  return this.finishNode(node, "IfStatement")
};

extension_pp$8.parseReturnStatement = function(node) {
  if (!this.inFunction && !this.options.allowReturnOutsideFunction)
    { this.raise(this.start, "'return' outside of function"); }
  this.next();

  // In `return` (and `break`/`continue`), the keywords with
  // optional arguments, we eagerly look for a semicolon or the
  // possibility to insert one.

  if (this.eat(extension_types$1.semi) || this.insertSemicolon()) { node.argument = null; }
  else { node.argument = this.parseExpression(); this.semicolon(); }
  return this.finishNode(node, "ReturnStatement")
};

extension_pp$8.parseSwitchStatement = function(node) {
  this.next();
  node.discriminant = this.parseParenExpression();
  node.cases = [];
  this.expect(extension_types$1.braceL);
  this.labels.push(extension_switchLabel);
  this.enterScope(0);

  // Statements under must be grouped (by label) in SwitchCase
  // nodes. `cur` is used to keep the node that we are currently
  // adding statements to.

  var cur;
  for (var sawDefault = false; this.type !== extension_types$1.braceR;) {
    if (this.type === extension_types$1._case || this.type === extension_types$1._default) {
      var isCase = this.type === extension_types$1._case;
      if (cur) { this.finishNode(cur, "SwitchCase"); }
      node.cases.push(cur = this.startNode());
      cur.consequent = [];
      this.next();
      if (isCase) {
        cur.test = this.parseExpression();
      } else {
        if (sawDefault) { this.raiseRecoverable(this.lastTokStart, "Multiple default clauses"); }
        sawDefault = true;
        cur.test = null;
      }
      this.expect(extension_types$1.colon);
    } else {
      if (!cur) { this.unexpected(); }
      cur.consequent.push(this.parseStatement(null));
    }
  }
  this.exitScope();
  if (cur) { this.finishNode(cur, "SwitchCase"); }
  this.next(); // Closing brace
  this.labels.pop();
  return this.finishNode(node, "SwitchStatement")
};

extension_pp$8.parseThrowStatement = function(node) {
  this.next();
  if (extension_lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
    { this.raise(this.lastTokEnd, "Illegal newline after throw"); }
  node.argument = this.parseExpression();
  this.semicolon();
  return this.finishNode(node, "ThrowStatement")
};

// Reused empty array added for node fields that are always empty.

var extension_empty$1 = [];

extension_pp$8.parseCatchClauseParam = function() {
  var param = this.parseBindingAtom();
  var simple = param.type === "Identifier";
  this.enterScope(simple ? extension_SCOPE_SIMPLE_CATCH : 0);
  this.checkLValPattern(param, simple ? extension_BIND_SIMPLE_CATCH : extension_BIND_LEXICAL);
  this.expect(extension_types$1.parenR);

  return param
};

extension_pp$8.parseTryStatement = function(node) {
  this.next();
  node.block = this.parseBlock();
  node.handler = null;
  if (this.type === extension_types$1._catch) {
    var clause = this.startNode();
    this.next();
    if (this.eat(extension_types$1.parenL)) {
      clause.param = this.parseCatchClauseParam();
    } else {
      if (this.options.ecmaVersion < 10) { this.unexpected(); }
      clause.param = null;
      this.enterScope(0);
    }
    clause.body = this.parseBlock(false);
    this.exitScope();
    node.handler = this.finishNode(clause, "CatchClause");
  }
  node.finalizer = this.eat(extension_types$1._finally) ? this.parseBlock() : null;
  if (!node.handler && !node.finalizer)
    { this.raise(node.start, "Missing catch or finally clause"); }
  return this.finishNode(node, "TryStatement")
};

extension_pp$8.parseVarStatement = function(node, kind, allowMissingInitializer) {
  this.next();
  this.parseVar(node, false, kind, allowMissingInitializer);
  this.semicolon();
  return this.finishNode(node, "VariableDeclaration")
};

extension_pp$8.parseWhileStatement = function(node) {
  this.next();
  node.test = this.parseParenExpression();
  this.labels.push(extension_loopLabel);
  node.body = this.parseStatement("while");
  this.labels.pop();
  return this.finishNode(node, "WhileStatement")
};

extension_pp$8.parseWithStatement = function(node) {
  if (this.strict) { this.raise(this.start, "'with' in strict mode"); }
  this.next();
  node.object = this.parseParenExpression();
  node.body = this.parseStatement("with");
  return this.finishNode(node, "WithStatement")
};

extension_pp$8.parseEmptyStatement = function(node) {
  this.next();
  return this.finishNode(node, "EmptyStatement")
};

extension_pp$8.parseLabeledStatement = function(node, maybeName, expr, context) {
  for (var i$1 = 0, list = this.labels; i$1 < list.length; i$1 += 1)
    {
    var label = list[i$1];

    if (label.name === maybeName)
      { this.raise(expr.start, "Label '" + maybeName + "' is already declared");
  } }
  var kind = this.type.isLoop ? "loop" : this.type === extension_types$1._switch ? "switch" : null;
  for (var i = this.labels.length - 1; i >= 0; i--) {
    var label$1 = this.labels[i];
    if (label$1.statementStart === node.start) {
      // Update information about previous labels on this node
      label$1.statementStart = this.start;
      label$1.kind = kind;
    } else { break }
  }
  this.labels.push({name: maybeName, kind: kind, statementStart: this.start});
  node.body = this.parseStatement(context ? context.indexOf("label") === -1 ? context + "label" : context : "label");
  this.labels.pop();
  node.label = expr;
  return this.finishNode(node, "LabeledStatement")
};

extension_pp$8.parseExpressionStatement = function(node, expr) {
  node.expression = expr;
  this.semicolon();
  return this.finishNode(node, "ExpressionStatement")
};

// Parse a semicolon-enclosed block of statements, handling `"use
// strict"` declarations when `allowStrict` is true (used for
// function bodies).

extension_pp$8.parseBlock = function(createNewLexicalScope, node, exitStrict) {
  if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true;
  if ( node === void 0 ) node = this.startNode();

  node.body = [];
  this.expect(extension_types$1.braceL);
  if (createNewLexicalScope) { this.enterScope(0); }
  while (this.type !== extension_types$1.braceR) {
    var stmt = this.parseStatement(null);
    node.body.push(stmt);
  }
  if (exitStrict) { this.strict = false; }
  this.next();
  if (createNewLexicalScope) { this.exitScope(); }
  return this.finishNode(node, "BlockStatement")
};

// Parse a regular `for` loop. The disambiguation code in
// `parseStatement` will already have parsed the init statement or
// expression.

extension_pp$8.parseFor = function(node, init) {
  node.init = init;
  this.expect(extension_types$1.semi);
  node.test = this.type === extension_types$1.semi ? null : this.parseExpression();
  this.expect(extension_types$1.semi);
  node.update = this.type === extension_types$1.parenR ? null : this.parseExpression();
  this.expect(extension_types$1.parenR);
  node.body = this.parseStatement("for");
  this.exitScope();
  this.labels.pop();
  return this.finishNode(node, "ForStatement")
};

// Parse a `for`/`in` and `for`/`of` loop, which are almost
// same from parser's perspective.

extension_pp$8.parseForIn = function(node, init) {
  var isForIn = this.type === extension_types$1._in;
  this.next();

  if (
    init.type === "VariableDeclaration" &&
    init.declarations[0].init != null &&
    (
      !isForIn ||
      this.options.ecmaVersion < 8 ||
      this.strict ||
      init.kind !== "var" ||
      init.declarations[0].id.type !== "Identifier"
    )
  ) {
    this.raise(
      init.start,
      ((isForIn ? "for-in" : "for-of") + " loop variable declaration may not have an initializer")
    );
  }
  node.left = init;
  node.right = isForIn ? this.parseExpression() : this.parseMaybeAssign();
  this.expect(extension_types$1.parenR);
  node.body = this.parseStatement("for");
  this.exitScope();
  this.labels.pop();
  return this.finishNode(node, isForIn ? "ForInStatement" : "ForOfStatement")
};

// Parse a list of variable declarations.

extension_pp$8.parseVar = function(node, isFor, kind, allowMissingInitializer) {
  node.declarations = [];
  node.kind = kind;
  for (;;) {
    var decl = this.startNode();
    this.parseVarId(decl, kind);
    if (this.eat(extension_types$1.eq)) {
      decl.init = this.parseMaybeAssign(isFor);
    } else if (!allowMissingInitializer && kind === "const" && !(this.type === extension_types$1._in || (this.options.ecmaVersion >= 6 && this.isContextual("of")))) {
      this.unexpected();
    } else if (!allowMissingInitializer && decl.id.type !== "Identifier" && !(isFor && (this.type === extension_types$1._in || this.isContextual("of")))) {
      this.raise(this.lastTokEnd, "Complex binding patterns require an initialization value");
    } else {
      decl.init = null;
    }
    node.declarations.push(this.finishNode(decl, "VariableDeclarator"));
    if (!this.eat(extension_types$1.comma)) { break }
  }
  return node
};

extension_pp$8.parseVarId = function(decl, kind) {
  decl.id = this.parseBindingAtom();
  this.checkLValPattern(decl.id, kind === "var" ? extension_BIND_VAR : extension_BIND_LEXICAL, false);
};

var extension_FUNC_STATEMENT = 1, extension_FUNC_HANGING_STATEMENT = 2, extension_FUNC_NULLABLE_ID = 4;

// Parse a function declaration or literal (depending on the
// `statement & FUNC_STATEMENT`).

// Remove `allowExpressionBody` for 7.0.0, as it is only called with false
extension_pp$8.parseFunction = function(node, statement, allowExpressionBody, isAsync, forInit) {
  this.initFunction(node);
  if (this.options.ecmaVersion >= 9 || this.options.ecmaVersion >= 6 && !isAsync) {
    if (this.type === extension_types$1.star && (statement & extension_FUNC_HANGING_STATEMENT))
      { this.unexpected(); }
    node.generator = this.eat(extension_types$1.star);
  }
  if (this.options.ecmaVersion >= 8)
    { node.async = !!isAsync; }

  if (statement & extension_FUNC_STATEMENT) {
    node.id = (statement & extension_FUNC_NULLABLE_ID) && this.type !== extension_types$1.name ? null : this.parseIdent();
    if (node.id && !(statement & extension_FUNC_HANGING_STATEMENT))
      // If it is a regular function declaration in sloppy mode, then it is
      // subject to Annex B semantics (BIND_FUNCTION). Otherwise, the binding
      // mode depends on properties of the current scope (see
      // treatFunctionsAsVar).
      { this.checkLValSimple(node.id, (this.strict || node.generator || node.async) ? this.treatFunctionsAsVar ? extension_BIND_VAR : extension_BIND_LEXICAL : extension_BIND_FUNCTION); }
  }

  var oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;
  this.yieldPos = 0;
  this.awaitPos = 0;
  this.awaitIdentPos = 0;
  this.enterScope(extension_functionFlags(node.async, node.generator));

  if (!(statement & extension_FUNC_STATEMENT))
    { node.id = this.type === extension_types$1.name ? this.parseIdent() : null; }

  this.parseFunctionParams(node);
  this.parseFunctionBody(node, allowExpressionBody, false, forInit);

  this.yieldPos = oldYieldPos;
  this.awaitPos = oldAwaitPos;
  this.awaitIdentPos = oldAwaitIdentPos;
  return this.finishNode(node, (statement & extension_FUNC_STATEMENT) ? "FunctionDeclaration" : "FunctionExpression")
};

extension_pp$8.parseFunctionParams = function(node) {
  this.expect(extension_types$1.parenL);
  node.params = this.parseBindingList(extension_types$1.parenR, false, this.options.ecmaVersion >= 8);
  this.checkYieldAwaitInDefaultParams();
};

// Parse a class declaration or literal (depending on the
// `isStatement` parameter).

extension_pp$8.parseClass = function(node, isStatement) {
  this.next();

  // ecma-262 14.6 Class Definitions
  // A class definition is always strict mode code.
  var oldStrict = this.strict;
  this.strict = true;

  this.parseClassId(node, isStatement);
  this.parseClassSuper(node);
  var privateNameMap = this.enterClassBody();
  var classBody = this.startNode();
  var hadConstructor = false;
  classBody.body = [];
  this.expect(extension_types$1.braceL);
  while (this.type !== extension_types$1.braceR) {
    var element = this.parseClassElement(node.superClass !== null);
    if (element) {
      classBody.body.push(element);
      if (element.type === "MethodDefinition" && element.kind === "constructor") {
        if (hadConstructor) { this.raiseRecoverable(element.start, "Duplicate constructor in the same class"); }
        hadConstructor = true;
      } else if (element.key && element.key.type === "PrivateIdentifier" && extension_isPrivateNameConflicted(privateNameMap, element)) {
        this.raiseRecoverable(element.key.start, ("Identifier '#" + (element.key.name) + "' has already been declared"));
      }
    }
  }
  this.strict = oldStrict;
  this.next();
  node.body = this.finishNode(classBody, "ClassBody");
  this.exitClassBody();
  return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
};

extension_pp$8.parseClassElement = function(constructorAllowsSuper) {
  if (this.eat(extension_types$1.semi)) { return null }

  var ecmaVersion = this.options.ecmaVersion;
  var node = this.startNode();
  var keyName = "";
  var isGenerator = false;
  var isAsync = false;
  var kind = "method";
  var isStatic = false;

  if (this.eatContextual("static")) {
    // Parse static init block
    if (ecmaVersion >= 13 && this.eat(extension_types$1.braceL)) {
      this.parseClassStaticBlock(node);
      return node
    }
    if (this.isClassElementNameStart() || this.type === extension_types$1.star) {
      isStatic = true;
    } else {
      keyName = "static";
    }
  }
  node.static = isStatic;
  if (!keyName && ecmaVersion >= 8 && this.eatContextual("async")) {
    if ((this.isClassElementNameStart() || this.type === extension_types$1.star) && !this.canInsertSemicolon()) {
      isAsync = true;
    } else {
      keyName = "async";
    }
  }
  if (!keyName && (ecmaVersion >= 9 || !isAsync) && this.eat(extension_types$1.star)) {
    isGenerator = true;
  }
  if (!keyName && !isAsync && !isGenerator) {
    var lastValue = this.value;
    if (this.eatContextual("get") || this.eatContextual("set")) {
      if (this.isClassElementNameStart()) {
        kind = lastValue;
      } else {
        keyName = lastValue;
      }
    }
  }

  // Parse element name
  if (keyName) {
    // 'async', 'get', 'set', or 'static' were not a keyword contextually.
    // The last token is any of those. Make it the element name.
    node.computed = false;
    node.key = this.startNodeAt(this.lastTokStart, this.lastTokStartLoc);
    node.key.name = keyName;
    this.finishNode(node.key, "Identifier");
  } else {
    this.parseClassElementName(node);
  }

  // Parse element value
  if (ecmaVersion < 13 || this.type === extension_types$1.parenL || kind !== "method" || isGenerator || isAsync) {
    var isConstructor = !node.static && extension_checkKeyName(node, "constructor");
    var allowsDirectSuper = isConstructor && constructorAllowsSuper;
    // Couldn't move this check into the 'parseClassMethod' method for backward compatibility.
    if (isConstructor && kind !== "method") { this.raise(node.key.start, "Constructor can't have get/set modifier"); }
    node.kind = isConstructor ? "constructor" : kind;
    this.parseClassMethod(node, isGenerator, isAsync, allowsDirectSuper);
  } else {
    this.parseClassField(node);
  }

  return node
};

extension_pp$8.isClassElementNameStart = function() {
  return (
    this.type === extension_types$1.name ||
    this.type === extension_types$1.privateId ||
    this.type === extension_types$1.num ||
    this.type === extension_types$1.string ||
    this.type === extension_types$1.bracketL ||
    this.type.keyword
  )
};

extension_pp$8.parseClassElementName = function(element) {
  if (this.type === extension_types$1.privateId) {
    if (this.value === "constructor") {
      this.raise(this.start, "Classes can't have an element named '#constructor'");
    }
    element.computed = false;
    element.key = this.parsePrivateIdent();
  } else {
    this.parsePropertyName(element);
  }
};

extension_pp$8.parseClassMethod = function(method, isGenerator, isAsync, allowsDirectSuper) {
  // Check key and flags
  var key = method.key;
  if (method.kind === "constructor") {
    if (isGenerator) { this.raise(key.start, "Constructor can't be a generator"); }
    if (isAsync) { this.raise(key.start, "Constructor can't be an async method"); }
  } else if (method.static && extension_checkKeyName(method, "prototype")) {
    this.raise(key.start, "Classes may not have a static property named prototype");
  }

  // Parse value
  var value = method.value = this.parseMethod(isGenerator, isAsync, allowsDirectSuper);

  // Check value
  if (method.kind === "get" && value.params.length !== 0)
    { this.raiseRecoverable(value.start, "getter should have no params"); }
  if (method.kind === "set" && value.params.length !== 1)
    { this.raiseRecoverable(value.start, "setter should have exactly one param"); }
  if (method.kind === "set" && value.params[0].type === "RestElement")
    { this.raiseRecoverable(value.params[0].start, "Setter cannot use rest params"); }

  return this.finishNode(method, "MethodDefinition")
};

extension_pp$8.parseClassField = function(field) {
  if (extension_checkKeyName(field, "constructor")) {
    this.raise(field.key.start, "Classes can't have a field named 'constructor'");
  } else if (field.static && extension_checkKeyName(field, "prototype")) {
    this.raise(field.key.start, "Classes can't have a static field named 'prototype'");
  }

  if (this.eat(extension_types$1.eq)) {
    // To raise SyntaxError if 'arguments' exists in the initializer.
    var scope = this.currentThisScope();
    var inClassFieldInit = scope.inClassFieldInit;
    scope.inClassFieldInit = true;
    field.value = this.parseMaybeAssign();
    scope.inClassFieldInit = inClassFieldInit;
  } else {
    field.value = null;
  }
  this.semicolon();

  return this.finishNode(field, "PropertyDefinition")
};

extension_pp$8.parseClassStaticBlock = function(node) {
  node.body = [];

  var oldLabels = this.labels;
  this.labels = [];
  this.enterScope(extension_SCOPE_CLASS_STATIC_BLOCK | extension_SCOPE_SUPER);
  while (this.type !== extension_types$1.braceR) {
    var stmt = this.parseStatement(null);
    node.body.push(stmt);
  }
  this.next();
  this.exitScope();
  this.labels = oldLabels;

  return this.finishNode(node, "StaticBlock")
};

extension_pp$8.parseClassId = function(node, isStatement) {
  if (this.type === extension_types$1.name) {
    node.id = this.parseIdent();
    if (isStatement)
      { this.checkLValSimple(node.id, extension_BIND_LEXICAL, false); }
  } else {
    if (isStatement === true)
      { this.unexpected(); }
    node.id = null;
  }
};

extension_pp$8.parseClassSuper = function(node) {
  node.superClass = this.eat(extension_types$1._extends) ? this.parseExprSubscripts(null, false) : null;
};

extension_pp$8.enterClassBody = function() {
  var element = {declared: Object.create(null), used: []};
  this.privateNameStack.push(element);
  return element.declared
};

extension_pp$8.exitClassBody = function() {
  var ref = this.privateNameStack.pop();
  var declared = ref.declared;
  var used = ref.used;
  if (!this.options.checkPrivateFields) { return }
  var len = this.privateNameStack.length;
  var parent = len === 0 ? null : this.privateNameStack[len - 1];
  for (var i = 0; i < used.length; ++i) {
    var id = used[i];
    if (!extension_hasOwn(declared, id.name)) {
      if (parent) {
        parent.used.push(id);
      } else {
        this.raiseRecoverable(id.start, ("Private field '#" + (id.name) + "' must be declared in an enclosing class"));
      }
    }
  }
};

function extension_isPrivateNameConflicted(privateNameMap, element) {
  var name = element.key.name;
  var curr = privateNameMap[name];

  var next = "true";
  if (element.type === "MethodDefinition" && (element.kind === "get" || element.kind === "set")) {
    next = (element.static ? "s" : "i") + element.kind;
  }

  // `class { get #a(){}; static set #a(_){} }` is also conflict.
  if (
    curr === "iget" && next === "iset" ||
    curr === "iset" && next === "iget" ||
    curr === "sget" && next === "sset" ||
    curr === "sset" && next === "sget"
  ) {
    privateNameMap[name] = "true";
    return false
  } else if (!curr) {
    privateNameMap[name] = next;
    return false
  } else {
    return true
  }
}

function extension_checkKeyName(node, name) {
  var computed = node.computed;
  var key = node.key;
  return !computed && (
    key.type === "Identifier" && key.name === name ||
    key.type === "Literal" && key.value === name
  )
}

// Parses module export declaration.

extension_pp$8.parseExportAllDeclaration = function(node, exports) {
  if (this.options.ecmaVersion >= 11) {
    if (this.eatContextual("as")) {
      node.exported = this.parseModuleExportName();
      this.checkExport(exports, node.exported, this.lastTokStart);
    } else {
      node.exported = null;
    }
  }
  this.expectContextual("from");
  if (this.type !== extension_types$1.string) { this.unexpected(); }
  node.source = this.parseExprAtom();
  if (this.options.ecmaVersion >= 16)
    { node.attributes = this.parseWithClause(); }
  this.semicolon();
  return this.finishNode(node, "ExportAllDeclaration")
};

extension_pp$8.parseExport = function(node, exports) {
  this.next();
  // export * from '...'
  if (this.eat(extension_types$1.star)) {
    return this.parseExportAllDeclaration(node, exports)
  }
  if (this.eat(extension_types$1._default)) { // export default ...
    this.checkExport(exports, "default", this.lastTokStart);
    node.declaration = this.parseExportDefaultDeclaration();
    return this.finishNode(node, "ExportDefaultDeclaration")
  }
  // export var|const|let|function|class ...
  if (this.shouldParseExportStatement()) {
    node.declaration = this.parseExportDeclaration(node);
    if (node.declaration.type === "VariableDeclaration")
      { this.checkVariableExport(exports, node.declaration.declarations); }
    else
      { this.checkExport(exports, node.declaration.id, node.declaration.id.start); }
    node.specifiers = [];
    node.source = null;
  } else { // export { x, y as z } [from '...']
    node.declaration = null;
    node.specifiers = this.parseExportSpecifiers(exports);
    if (this.eatContextual("from")) {
      if (this.type !== extension_types$1.string) { this.unexpected(); }
      node.source = this.parseExprAtom();
      if (this.options.ecmaVersion >= 16)
        { node.attributes = this.parseWithClause(); }
    } else {
      for (var i = 0, list = node.specifiers; i < list.length; i += 1) {
        // check for keywords used as local names
        var spec = list[i];

        this.checkUnreserved(spec.local);
        // check if export is defined
        this.checkLocalExport(spec.local);

        if (spec.local.type === "Literal") {
          this.raise(spec.local.start, "A string literal cannot be used as an exported binding without `from`.");
        }
      }

      node.source = null;
    }
    this.semicolon();
  }
  return this.finishNode(node, "ExportNamedDeclaration")
};

extension_pp$8.parseExportDeclaration = function(node) {
  return this.parseStatement(null)
};

extension_pp$8.parseExportDefaultDeclaration = function() {
  var isAsync;
  if (this.type === extension_types$1._function || (isAsync = this.isAsyncFunction())) {
    var fNode = this.startNode();
    this.next();
    if (isAsync) { this.next(); }
    return this.parseFunction(fNode, extension_FUNC_STATEMENT | extension_FUNC_NULLABLE_ID, false, isAsync)
  } else if (this.type === extension_types$1._class) {
    var cNode = this.startNode();
    return this.parseClass(cNode, "nullableID")
  } else {
    var declaration = this.parseMaybeAssign();
    this.semicolon();
    return declaration
  }
};

extension_pp$8.checkExport = function(exports, name, pos) {
  if (!exports) { return }
  if (typeof name !== "string")
    { name = name.type === "Identifier" ? name.name : name.value; }
  if (extension_hasOwn(exports, name))
    { this.raiseRecoverable(pos, "Duplicate export '" + name + "'"); }
  exports[name] = true;
};

extension_pp$8.checkPatternExport = function(exports, pat) {
  var type = pat.type;
  if (type === "Identifier")
    { this.checkExport(exports, pat, pat.start); }
  else if (type === "ObjectPattern")
    { for (var i = 0, list = pat.properties; i < list.length; i += 1)
      {
        var prop = list[i];

        this.checkPatternExport(exports, prop);
      } }
  else if (type === "ArrayPattern")
    { for (var i$1 = 0, list$1 = pat.elements; i$1 < list$1.length; i$1 += 1) {
      var elt = list$1[i$1];

        if (elt) { this.checkPatternExport(exports, elt); }
    } }
  else if (type === "Property")
    { this.checkPatternExport(exports, pat.value); }
  else if (type === "AssignmentPattern")
    { this.checkPatternExport(exports, pat.left); }
  else if (type === "RestElement")
    { this.checkPatternExport(exports, pat.argument); }
};

extension_pp$8.checkVariableExport = function(exports, decls) {
  if (!exports) { return }
  for (var i = 0, list = decls; i < list.length; i += 1)
    {
    var decl = list[i];

    this.checkPatternExport(exports, decl.id);
  }
};

extension_pp$8.shouldParseExportStatement = function() {
  return this.type.keyword === "var" ||
    this.type.keyword === "const" ||
    this.type.keyword === "class" ||
    this.type.keyword === "function" ||
    this.isLet() ||
    this.isAsyncFunction()
};

// Parses a comma-separated list of module exports.

extension_pp$8.parseExportSpecifier = function(exports) {
  var node = this.startNode();
  node.local = this.parseModuleExportName();

  node.exported = this.eatContextual("as") ? this.parseModuleExportName() : node.local;
  this.checkExport(
    exports,
    node.exported,
    node.exported.start
  );

  return this.finishNode(node, "ExportSpecifier")
};

extension_pp$8.parseExportSpecifiers = function(exports) {
  var nodes = [], first = true;
  // export { x, y as z } [from '...']
  this.expect(extension_types$1.braceL);
  while (!this.eat(extension_types$1.braceR)) {
    if (!first) {
      this.expect(extension_types$1.comma);
      if (this.afterTrailingComma(extension_types$1.braceR)) { break }
    } else { first = false; }

    nodes.push(this.parseExportSpecifier(exports));
  }
  return nodes
};

// Parses import declaration.

extension_pp$8.parseImport = function(node) {
  this.next();

  // import '...'
  if (this.type === extension_types$1.string) {
    node.specifiers = extension_empty$1;
    node.source = this.parseExprAtom();
  } else {
    node.specifiers = this.parseImportSpecifiers();
    this.expectContextual("from");
    node.source = this.type === extension_types$1.string ? this.parseExprAtom() : this.unexpected();
  }
  if (this.options.ecmaVersion >= 16)
    { node.attributes = this.parseWithClause(); }
  this.semicolon();
  return this.finishNode(node, "ImportDeclaration")
};

// Parses a comma-separated list of module imports.

extension_pp$8.parseImportSpecifier = function() {
  var node = this.startNode();
  node.imported = this.parseModuleExportName();

  if (this.eatContextual("as")) {
    node.local = this.parseIdent();
  } else {
    this.checkUnreserved(node.imported);
    node.local = node.imported;
  }
  this.checkLValSimple(node.local, extension_BIND_LEXICAL);

  return this.finishNode(node, "ImportSpecifier")
};

extension_pp$8.parseImportDefaultSpecifier = function() {
  // import defaultObj, { x, y as z } from '...'
  var node = this.startNode();
  node.local = this.parseIdent();
  this.checkLValSimple(node.local, extension_BIND_LEXICAL);
  return this.finishNode(node, "ImportDefaultSpecifier")
};

extension_pp$8.parseImportNamespaceSpecifier = function() {
  var node = this.startNode();
  this.next();
  this.expectContextual("as");
  node.local = this.parseIdent();
  this.checkLValSimple(node.local, extension_BIND_LEXICAL);
  return this.finishNode(node, "ImportNamespaceSpecifier")
};

extension_pp$8.parseImportSpecifiers = function() {
  var nodes = [], first = true;
  if (this.type === extension_types$1.name) {
    nodes.push(this.parseImportDefaultSpecifier());
    if (!this.eat(extension_types$1.comma)) { return nodes }
  }
  if (this.type === extension_types$1.star) {
    nodes.push(this.parseImportNamespaceSpecifier());
    return nodes
  }
  this.expect(extension_types$1.braceL);
  while (!this.eat(extension_types$1.braceR)) {
    if (!first) {
      this.expect(extension_types$1.comma);
      if (this.afterTrailingComma(extension_types$1.braceR)) { break }
    } else { first = false; }

    nodes.push(this.parseImportSpecifier());
  }
  return nodes
};

extension_pp$8.parseWithClause = function() {
  var nodes = [];
  if (!this.eat(extension_types$1._with)) {
    return nodes
  }
  this.expect(extension_types$1.braceL);
  var attributeKeys = {};
  var first = true;
  while (!this.eat(extension_types$1.braceR)) {
    if (!first) {
      this.expect(extension_types$1.comma);
      if (this.afterTrailingComma(extension_types$1.braceR)) { break }
    } else { first = false; }

    var attr = this.parseImportAttribute();
    var keyName = attr.key.type === "Identifier" ? attr.key.name : attr.key.value;
    if (extension_hasOwn(attributeKeys, keyName))
      { this.raiseRecoverable(attr.key.start, "Duplicate attribute key '" + keyName + "'"); }
    attributeKeys[keyName] = true;
    nodes.push(attr);
  }
  return nodes
};

extension_pp$8.parseImportAttribute = function() {
  var node = this.startNode();
  node.key = this.type === extension_types$1.string ? this.parseExprAtom() : this.parseIdent(this.options.allowReserved !== "never");
  this.expect(extension_types$1.colon);
  if (this.type !== extension_types$1.string) {
    this.unexpected();
  }
  node.value = this.parseExprAtom();
  return this.finishNode(node, "ImportAttribute")
};

extension_pp$8.parseModuleExportName = function() {
  if (this.options.ecmaVersion >= 13 && this.type === extension_types$1.string) {
    var stringLiteral = this.parseLiteral(this.value);
    if (extension_loneSurrogate.test(stringLiteral.value)) {
      this.raise(stringLiteral.start, "An export name cannot include a lone surrogate.");
    }
    return stringLiteral
  }
  return this.parseIdent(true)
};

// Set `ExpressionStatement#directive` property for directive prologues.
extension_pp$8.adaptDirectivePrologue = function(statements) {
  for (var i = 0; i < statements.length && this.isDirectiveCandidate(statements[i]); ++i) {
    statements[i].directive = statements[i].expression.raw.slice(1, -1);
  }
};
extension_pp$8.isDirectiveCandidate = function(statement) {
  return (
    this.options.ecmaVersion >= 5 &&
    statement.type === "ExpressionStatement" &&
    statement.expression.type === "Literal" &&
    typeof statement.expression.value === "string" &&
    // Reject parenthesized strings.
    (this.input[statement.start] === "\"" || this.input[statement.start] === "'")
  )
};

var extension_pp$7 = extension_Parser.prototype;

// Convert existing expression atom to assignable pattern
// if possible.

extension_pp$7.toAssignable = function(node, isBinding, refDestructuringErrors) {
  if (this.options.ecmaVersion >= 6 && node) {
    switch (node.type) {
    case "Identifier":
      if (this.inAsync && node.name === "await")
        { this.raise(node.start, "Cannot use 'await' as identifier inside an async function"); }
      break

    case "ObjectPattern":
    case "ArrayPattern":
    case "AssignmentPattern":
    case "RestElement":
      break

    case "ObjectExpression":
      node.type = "ObjectPattern";
      if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
      for (var i = 0, list = node.properties; i < list.length; i += 1) {
        var prop = list[i];

      this.toAssignable(prop, isBinding);
        // Early error:
        //   AssignmentRestProperty[Yield, Await] :
        //     `...` DestructuringAssignmentTarget[Yield, Await]
        //
        //   It is a Syntax Error if |DestructuringAssignmentTarget| is an |ArrayLiteral| or an |ObjectLiteral|.
        if (
          prop.type === "RestElement" &&
          (prop.argument.type === "ArrayPattern" || prop.argument.type === "ObjectPattern")
        ) {
          this.raise(prop.argument.start, "Unexpected token");
        }
      }
      break

    case "Property":
      // AssignmentProperty has type === "Property"
      if (node.kind !== "init") { this.raise(node.key.start, "Object pattern can't contain getter or setter"); }
      this.toAssignable(node.value, isBinding);
      break

    case "ArrayExpression":
      node.type = "ArrayPattern";
      if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
      this.toAssignableList(node.elements, isBinding);
      break

    case "SpreadElement":
      node.type = "RestElement";
      this.toAssignable(node.argument, isBinding);
      if (node.argument.type === "AssignmentPattern")
        { this.raise(node.argument.start, "Rest elements cannot have a default value"); }
      break

    case "AssignmentExpression":
      if (node.operator !== "=") { this.raise(node.left.end, "Only '=' operator can be used for specifying default value."); }
      node.type = "AssignmentPattern";
      delete node.operator;
      this.toAssignable(node.left, isBinding);
      break

    case "ParenthesizedExpression":
      this.toAssignable(node.expression, isBinding, refDestructuringErrors);
      break

    case "ChainExpression":
      this.raiseRecoverable(node.start, "Optional chaining cannot appear in left-hand side");
      break

    case "MemberExpression":
      if (!isBinding) { break }

    default:
      this.raise(node.start, "Assigning to rvalue");
    }
  } else if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
  return node
};

// Convert list of expression atoms to binding list.

extension_pp$7.toAssignableList = function(exprList, isBinding) {
  var end = exprList.length;
  for (var i = 0; i < end; i++) {
    var elt = exprList[i];
    if (elt) { this.toAssignable(elt, isBinding); }
  }
  if (end) {
    var last = exprList[end - 1];
    if (this.options.ecmaVersion === 6 && isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
      { this.unexpected(last.argument.start); }
  }
  return exprList
};

// Parses spread element.

extension_pp$7.parseSpread = function(refDestructuringErrors) {
  var node = this.startNode();
  this.next();
  node.argument = this.parseMaybeAssign(false, refDestructuringErrors);
  return this.finishNode(node, "SpreadElement")
};

extension_pp$7.parseRestBinding = function() {
  var node = this.startNode();
  this.next();

  // RestElement inside of a function parameter must be an identifier
  if (this.options.ecmaVersion === 6 && this.type !== extension_types$1.name)
    { this.unexpected(); }

  node.argument = this.parseBindingAtom();

  return this.finishNode(node, "RestElement")
};

// Parses lvalue (assignable) atom.

extension_pp$7.parseBindingAtom = function() {
  if (this.options.ecmaVersion >= 6) {
    switch (this.type) {
    case extension_types$1.bracketL:
      var node = this.startNode();
      this.next();
      node.elements = this.parseBindingList(extension_types$1.bracketR, true, true);
      return this.finishNode(node, "ArrayPattern")

    case extension_types$1.braceL:
      return this.parseObj(true)
    }
  }
  return this.parseIdent()
};

extension_pp$7.parseBindingList = function(close, allowEmpty, allowTrailingComma, allowModifiers) {
  var elts = [], first = true;
  while (!this.eat(close)) {
    if (first) { first = false; }
    else { this.expect(extension_types$1.comma); }
    if (allowEmpty && this.type === extension_types$1.comma) {
      elts.push(null);
    } else if (allowTrailingComma && this.afterTrailingComma(close)) {
      break
    } else if (this.type === extension_types$1.ellipsis) {
      var rest = this.parseRestBinding();
      this.parseBindingListItem(rest);
      elts.push(rest);
      if (this.type === extension_types$1.comma) { this.raiseRecoverable(this.start, "Comma is not permitted after the rest element"); }
      this.expect(close);
      break
    } else {
      elts.push(this.parseAssignableListItem(allowModifiers));
    }
  }
  return elts
};

extension_pp$7.parseAssignableListItem = function(allowModifiers) {
  var elem = this.parseMaybeDefault(this.start, this.startLoc);
  this.parseBindingListItem(elem);
  return elem
};

extension_pp$7.parseBindingListItem = function(param) {
  return param
};

// Parses assignment pattern around given atom if possible.

extension_pp$7.parseMaybeDefault = function(startPos, startLoc, left) {
  left = left || this.parseBindingAtom();
  if (this.options.ecmaVersion < 6 || !this.eat(extension_types$1.eq)) { return left }
  var node = this.startNodeAt(startPos, startLoc);
  node.left = left;
  node.right = this.parseMaybeAssign();
  return this.finishNode(node, "AssignmentPattern")
};

// The following three functions all verify that a node is an lvalue —
// something that can be bound, or assigned to. In order to do so, they perform
// a variety of checks:
//
// - Check that none of the bound/assigned-to identifiers are reserved words.
// - Record name declarations for bindings in the appropriate scope.
// - Check duplicate argument names, if checkClashes is set.
//
// If a complex binding pattern is encountered (e.g., object and array
// destructuring), the entire pattern is recursively checked.
//
// There are three versions of checkLVal*() appropriate for different
// circumstances:
//
// - checkLValSimple() shall be used if the syntactic construct supports
//   nothing other than identifiers and member expressions. Parenthesized
//   expressions are also correctly handled. This is generally appropriate for
//   constructs for which the spec says
//
//   > It is a Syntax Error if AssignmentTargetType of [the production] is not
//   > simple.
//
//   It is also appropriate for checking if an identifier is valid and not
//   defined elsewhere, like import declarations or function/class identifiers.
//
//   Examples where this is used include:
//     a += …;
//     import a from '…';
//   where a is the node to be checked.
//
// - checkLValPattern() shall be used if the syntactic construct supports
//   anything checkLValSimple() supports, as well as object and array
//   destructuring patterns. This is generally appropriate for constructs for
//   which the spec says
//
//   > It is a Syntax Error if [the production] is neither an ObjectLiteral nor
//   > an ArrayLiteral and AssignmentTargetType of [the production] is not
//   > simple.
//
//   Examples where this is used include:
//     (a = …);
//     const a = …;
//     try { … } catch (a) { … }
//   where a is the node to be checked.
//
// - checkLValInnerPattern() shall be used if the syntactic construct supports
//   anything checkLValPattern() supports, as well as default assignment
//   patterns, rest elements, and other constructs that may appear within an
//   object or array destructuring pattern.
//
//   As a special case, function parameters also use checkLValInnerPattern(),
//   as they also support defaults and rest constructs.
//
// These functions deliberately support both assignment and binding constructs,
// as the logic for both is exceedingly similar. If the node is the target of
// an assignment, then bindingType should be set to BIND_NONE. Otherwise, it
// should be set to the appropriate BIND_* constant, like BIND_VAR or
// BIND_LEXICAL.
//
// If the function is called with a non-BIND_NONE bindingType, then
// additionally a checkClashes object may be specified to allow checking for
// duplicate argument names. checkClashes is ignored if the provided construct
// is an assignment (i.e., bindingType is BIND_NONE).

extension_pp$7.checkLValSimple = function(expr, bindingType, checkClashes) {
  if ( bindingType === void 0 ) bindingType = extension_BIND_NONE;

  var isBind = bindingType !== extension_BIND_NONE;

  switch (expr.type) {
  case "Identifier":
    if (this.strict && this.reservedWordsStrictBind.test(expr.name))
      { this.raiseRecoverable(expr.start, (isBind ? "Binding " : "Assigning to ") + expr.name + " in strict mode"); }
    if (isBind) {
      if (bindingType === extension_BIND_LEXICAL && expr.name === "let")
        { this.raiseRecoverable(expr.start, "let is disallowed as a lexically bound name"); }
      if (checkClashes) {
        if (extension_hasOwn(checkClashes, expr.name))
          { this.raiseRecoverable(expr.start, "Argument name clash"); }
        checkClashes[expr.name] = true;
      }
      if (bindingType !== extension_BIND_OUTSIDE) { this.declareName(expr.name, bindingType, expr.start); }
    }
    break

  case "ChainExpression":
    this.raiseRecoverable(expr.start, "Optional chaining cannot appear in left-hand side");
    break

  case "MemberExpression":
    if (isBind) { this.raiseRecoverable(expr.start, "Binding member expression"); }
    break

  case "ParenthesizedExpression":
    if (isBind) { this.raiseRecoverable(expr.start, "Binding parenthesized expression"); }
    return this.checkLValSimple(expr.expression, bindingType, checkClashes)

  default:
    this.raise(expr.start, (isBind ? "Binding" : "Assigning to") + " rvalue");
  }
};

extension_pp$7.checkLValPattern = function(expr, bindingType, checkClashes) {
  if ( bindingType === void 0 ) bindingType = extension_BIND_NONE;

  switch (expr.type) {
  case "ObjectPattern":
    for (var i = 0, list = expr.properties; i < list.length; i += 1) {
      var prop = list[i];

    this.checkLValInnerPattern(prop, bindingType, checkClashes);
    }
    break

  case "ArrayPattern":
    for (var i$1 = 0, list$1 = expr.elements; i$1 < list$1.length; i$1 += 1) {
      var elem = list$1[i$1];

    if (elem) { this.checkLValInnerPattern(elem, bindingType, checkClashes); }
    }
    break

  default:
    this.checkLValSimple(expr, bindingType, checkClashes);
  }
};

extension_pp$7.checkLValInnerPattern = function(expr, bindingType, checkClashes) {
  if ( bindingType === void 0 ) bindingType = extension_BIND_NONE;

  switch (expr.type) {
  case "Property":
    // AssignmentProperty has type === "Property"
    this.checkLValInnerPattern(expr.value, bindingType, checkClashes);
    break

  case "AssignmentPattern":
    this.checkLValPattern(expr.left, bindingType, checkClashes);
    break

  case "RestElement":
    this.checkLValPattern(expr.argument, bindingType, checkClashes);
    break

  default:
    this.checkLValPattern(expr, bindingType, checkClashes);
  }
};

// The algorithm used to determine whether a regexp can appear at a
// given point in the program is loosely based on sweet.js' approach.
// See https://github.com/mozilla/sweet.js/wiki/design


var extension_TokContext = function TokContext(token, isExpr, preserveSpace, override, generator) {
  this.token = token;
  this.isExpr = !!isExpr;
  this.preserveSpace = !!preserveSpace;
  this.override = override;
  this.generator = !!generator;
};

var extension_types = {
  b_stat: new extension_TokContext("{", false),
  b_expr: new extension_TokContext("{", true),
  b_tmpl: new extension_TokContext("${", false),
  p_stat: new extension_TokContext("(", false),
  p_expr: new extension_TokContext("(", true),
  q_tmpl: new extension_TokContext("`", true, true, function (p) { return p.tryReadTemplateToken(); }),
  f_stat: new extension_TokContext("function", false),
  f_expr: new extension_TokContext("function", true),
  f_expr_gen: new extension_TokContext("function", true, false, null, true),
  f_gen: new extension_TokContext("function", false, false, null, true)
};

var extension_pp$6 = extension_Parser.prototype;

extension_pp$6.initialContext = function() {
  return [extension_types.b_stat]
};

extension_pp$6.curContext = function() {
  return this.context[this.context.length - 1]
};

extension_pp$6.braceIsBlock = function(prevType) {
  var parent = this.curContext();
  if (parent === extension_types.f_expr || parent === extension_types.f_stat)
    { return true }
  if (prevType === extension_types$1.colon && (parent === extension_types.b_stat || parent === extension_types.b_expr))
    { return !parent.isExpr }

  // The check for `tt.name && exprAllowed` detects whether we are
  // after a `yield` or `of` construct. See the `updateContext` for
  // `tt.name`.
  if (prevType === extension_types$1._return || prevType === extension_types$1.name && this.exprAllowed)
    { return extension_lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) }
  if (prevType === extension_types$1._else || prevType === extension_types$1.semi || prevType === extension_types$1.eof || prevType === extension_types$1.parenR || prevType === extension_types$1.arrow)
    { return true }
  if (prevType === extension_types$1.braceL)
    { return parent === extension_types.b_stat }
  if (prevType === extension_types$1._var || prevType === extension_types$1._const || prevType === extension_types$1.name)
    { return false }
  return !this.exprAllowed
};

extension_pp$6.inGeneratorContext = function() {
  for (var i = this.context.length - 1; i >= 1; i--) {
    var context = this.context[i];
    if (context.token === "function")
      { return context.generator }
  }
  return false
};

extension_pp$6.updateContext = function(prevType) {
  var update, type = this.type;
  if (type.keyword && prevType === extension_types$1.dot)
    { this.exprAllowed = false; }
  else if (update = type.updateContext)
    { update.call(this, prevType); }
  else
    { this.exprAllowed = type.beforeExpr; }
};

// Used to handle edge cases when token context could not be inferred correctly during tokenization phase

extension_pp$6.overrideContext = function(tokenCtx) {
  if (this.curContext() !== tokenCtx) {
    this.context[this.context.length - 1] = tokenCtx;
  }
};

// Token-specific context update code

extension_types$1.parenR.updateContext = extension_types$1.braceR.updateContext = function() {
  if (this.context.length === 1) {
    this.exprAllowed = true;
    return
  }
  var out = this.context.pop();
  if (out === extension_types.b_stat && this.curContext().token === "function") {
    out = this.context.pop();
  }
  this.exprAllowed = !out.isExpr;
};

extension_types$1.braceL.updateContext = function(prevType) {
  this.context.push(this.braceIsBlock(prevType) ? extension_types.b_stat : extension_types.b_expr);
  this.exprAllowed = true;
};

extension_types$1.dollarBraceL.updateContext = function() {
  this.context.push(extension_types.b_tmpl);
  this.exprAllowed = true;
};

extension_types$1.parenL.updateContext = function(prevType) {
  var statementParens = prevType === extension_types$1._if || prevType === extension_types$1._for || prevType === extension_types$1._with || prevType === extension_types$1._while;
  this.context.push(statementParens ? extension_types.p_stat : extension_types.p_expr);
  this.exprAllowed = true;
};

extension_types$1.incDec.updateContext = function() {
  // tokExprAllowed stays unchanged
};

extension_types$1._function.updateContext = extension_types$1._class.updateContext = function(prevType) {
  if (prevType.beforeExpr && prevType !== extension_types$1._else &&
      !(prevType === extension_types$1.semi && this.curContext() !== extension_types.p_stat) &&
      !(prevType === extension_types$1._return && extension_lineBreak.test(this.input.slice(this.lastTokEnd, this.start))) &&
      !((prevType === extension_types$1.colon || prevType === extension_types$1.braceL) && this.curContext() === extension_types.b_stat))
    { this.context.push(extension_types.f_expr); }
  else
    { this.context.push(extension_types.f_stat); }
  this.exprAllowed = false;
};

extension_types$1.colon.updateContext = function() {
  if (this.curContext().token === "function") { this.context.pop(); }
  this.exprAllowed = true;
};

extension_types$1.backQuote.updateContext = function() {
  if (this.curContext() === extension_types.q_tmpl)
    { this.context.pop(); }
  else
    { this.context.push(extension_types.q_tmpl); }
  this.exprAllowed = false;
};

extension_types$1.star.updateContext = function(prevType) {
  if (prevType === extension_types$1._function) {
    var index = this.context.length - 1;
    if (this.context[index] === extension_types.f_expr)
      { this.context[index] = extension_types.f_expr_gen; }
    else
      { this.context[index] = extension_types.f_gen; }
  }
  this.exprAllowed = true;
};

extension_types$1.name.updateContext = function(prevType) {
  var allowed = false;
  if (this.options.ecmaVersion >= 6 && prevType !== extension_types$1.dot) {
    if (this.value === "of" && !this.exprAllowed ||
        this.value === "yield" && this.inGeneratorContext())
      { allowed = true; }
  }
  this.exprAllowed = allowed;
};

// A recursive descent parser operates by defining functions for all
// syntactic elements, and recursively calling those, each function
// advancing the input stream and returning an AST node. Precedence
// of constructs (for example, the fact that `!x[1]` means `!(x[1])`
// instead of `(!x)[1]` is handled by the fact that the parser
// function that parses unary prefix operators is called first, and
// in turn calls the function that parses `[]` subscripts — that
// way, it'll receive the node for `x[1]` already parsed, and wraps
// *that* in the unary operator node.
//
// Acorn uses an [operator precedence parser][opp] to handle binary
// operator precedence, because it is much more compact than using
// the technique outlined above, which uses different, nesting
// functions to specify precedence, for all of the ten binary
// precedence levels that JavaScript defines.
//
// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser


var extension_pp$5 = extension_Parser.prototype;

// Check if property name clashes with already added.
// Object/class getters and setters are not allowed to clash —
// either with each other or with an init property — and in
// strict mode, init properties are also not allowed to be repeated.

extension_pp$5.checkPropClash = function(prop, propHash, refDestructuringErrors) {
  if (this.options.ecmaVersion >= 9 && prop.type === "SpreadElement")
    { return }
  if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))
    { return }
  var key = prop.key;
  var name;
  switch (key.type) {
  case "Identifier": name = key.name; break
  case "Literal": name = String(key.value); break
  default: return
  }
  var kind = prop.kind;
  if (this.options.ecmaVersion >= 6) {
    if (name === "__proto__" && kind === "init") {
      if (propHash.proto) {
        if (refDestructuringErrors) {
          if (refDestructuringErrors.doubleProto < 0) {
            refDestructuringErrors.doubleProto = key.start;
          }
        } else {
          this.raiseRecoverable(key.start, "Redefinition of __proto__ property");
        }
      }
      propHash.proto = true;
    }
    return
  }
  name = "$" + name;
  var other = propHash[name];
  if (other) {
    var redefinition;
    if (kind === "init") {
      redefinition = this.strict && other.init || other.get || other.set;
    } else {
      redefinition = other.init || other[kind];
    }
    if (redefinition)
      { this.raiseRecoverable(key.start, "Redefinition of property"); }
  } else {
    other = propHash[name] = {
      init: false,
      get: false,
      set: false
    };
  }
  other[kind] = true;
};

// ### Expression parsing

// These nest, from the most general expression type at the top to
// 'atomic', nondivisible expression types at the bottom. Most of
// the functions will simply let the function(s) below them parse,
// and, *if* the syntactic construct they handle is present, wrap
// the AST node that the inner parser gave them in another node.

// Parse a full expression. The optional arguments are used to
// forbid the `in` operator (in for loops initalization expressions)
// and provide reference for storing '=' operator inside shorthand
// property assignment in contexts where both object expression
// and object pattern might appear (so it's possible to raise
// delayed syntax error at correct position).

extension_pp$5.parseExpression = function(forInit, refDestructuringErrors) {
  var startPos = this.start, startLoc = this.startLoc;
  var expr = this.parseMaybeAssign(forInit, refDestructuringErrors);
  if (this.type === extension_types$1.comma) {
    var node = this.startNodeAt(startPos, startLoc);
    node.expressions = [expr];
    while (this.eat(extension_types$1.comma)) { node.expressions.push(this.parseMaybeAssign(forInit, refDestructuringErrors)); }
    return this.finishNode(node, "SequenceExpression")
  }
  return expr
};

// Parse an assignment expression. This includes applications of
// operators like `+=`.

extension_pp$5.parseMaybeAssign = function(forInit, refDestructuringErrors, afterLeftParse) {
  if (this.isContextual("yield")) {
    if (this.inGenerator) { return this.parseYield(forInit) }
    // The tokenizer will assume an expression is allowed after
    // `yield`, but this isn't that kind of yield
    else { this.exprAllowed = false; }
  }

  var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1, oldDoubleProto = -1;
  if (refDestructuringErrors) {
    oldParenAssign = refDestructuringErrors.parenthesizedAssign;
    oldTrailingComma = refDestructuringErrors.trailingComma;
    oldDoubleProto = refDestructuringErrors.doubleProto;
    refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1;
  } else {
    refDestructuringErrors = new extension_DestructuringErrors;
    ownDestructuringErrors = true;
  }

  var startPos = this.start, startLoc = this.startLoc;
  if (this.type === extension_types$1.parenL || this.type === extension_types$1.name) {
    this.potentialArrowAt = this.start;
    this.potentialArrowInForAwait = forInit === "await";
  }
  var left = this.parseMaybeConditional(forInit, refDestructuringErrors);
  if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); }
  if (this.type.isAssign) {
    var node = this.startNodeAt(startPos, startLoc);
    node.operator = this.value;
    if (this.type === extension_types$1.eq)
      { left = this.toAssignable(left, false, refDestructuringErrors); }
    if (!ownDestructuringErrors) {
      refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = refDestructuringErrors.doubleProto = -1;
    }
    if (refDestructuringErrors.shorthandAssign >= left.start)
      { refDestructuringErrors.shorthandAssign = -1; } // reset because shorthand default was used correctly
    if (this.type === extension_types$1.eq)
      { this.checkLValPattern(left); }
    else
      { this.checkLValSimple(left); }
    node.left = left;
    this.next();
    node.right = this.parseMaybeAssign(forInit);
    if (oldDoubleProto > -1) { refDestructuringErrors.doubleProto = oldDoubleProto; }
    return this.finishNode(node, "AssignmentExpression")
  } else {
    if (ownDestructuringErrors) { this.checkExpressionErrors(refDestructuringErrors, true); }
  }
  if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; }
  if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; }
  return left
};

// Parse a ternary conditional (`?:`) operator.

extension_pp$5.parseMaybeConditional = function(forInit, refDestructuringErrors) {
  var startPos = this.start, startLoc = this.startLoc;
  var expr = this.parseExprOps(forInit, refDestructuringErrors);
  if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
  if (this.eat(extension_types$1.question)) {
    var node = this.startNodeAt(startPos, startLoc);
    node.test = expr;
    node.consequent = this.parseMaybeAssign();
    this.expect(extension_types$1.colon);
    node.alternate = this.parseMaybeAssign(forInit);
    return this.finishNode(node, "ConditionalExpression")
  }
  return expr
};

// Start the precedence parser.

extension_pp$5.parseExprOps = function(forInit, refDestructuringErrors) {
  var startPos = this.start, startLoc = this.startLoc;
  var expr = this.parseMaybeUnary(refDestructuringErrors, false, false, forInit);
  if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
  return expr.start === startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, forInit)
};

// Parse binary operators with the operator precedence parsing
// algorithm. `left` is the left-hand side of the operator.
// `minPrec` provides context that allows the function to stop and
// defer further parser to one of its callers when it encounters an
// operator that has a lower precedence than the set it is parsing.

extension_pp$5.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, forInit) {
  var prec = this.type.binop;
  if (prec != null && (!forInit || this.type !== extension_types$1._in)) {
    if (prec > minPrec) {
      var logical = this.type === extension_types$1.logicalOR || this.type === extension_types$1.logicalAND;
      var coalesce = this.type === extension_types$1.coalesce;
      if (coalesce) {
        // Handle the precedence of `tt.coalesce` as equal to the range of logical expressions.
        // In other words, `node.right` shouldn't contain logical expressions in order to check the mixed error.
        prec = extension_types$1.logicalAND.binop;
      }
      var op = this.value;
      this.next();
      var startPos = this.start, startLoc = this.startLoc;
      var right = this.parseExprOp(this.parseMaybeUnary(null, false, false, forInit), startPos, startLoc, prec, forInit);
      var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical || coalesce);
      if ((logical && this.type === extension_types$1.coalesce) || (coalesce && (this.type === extension_types$1.logicalOR || this.type === extension_types$1.logicalAND))) {
        this.raiseRecoverable(this.start, "Logical expressions and coalesce expressions cannot be mixed. Wrap either by parentheses");
      }
      return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, forInit)
    }
  }
  return left
};

extension_pp$5.buildBinary = function(startPos, startLoc, left, right, op, logical) {
  if (right.type === "PrivateIdentifier") { this.raise(right.start, "Private identifier can only be left side of binary expression"); }
  var node = this.startNodeAt(startPos, startLoc);
  node.left = left;
  node.operator = op;
  node.right = right;
  return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression")
};

// Parse unary operators, both prefix and postfix.

extension_pp$5.parseMaybeUnary = function(refDestructuringErrors, sawUnary, incDec, forInit) {
  var startPos = this.start, startLoc = this.startLoc, expr;
  if (this.isContextual("await") && this.canAwait) {
    expr = this.parseAwait(forInit);
    sawUnary = true;
  } else if (this.type.prefix) {
    var node = this.startNode(), update = this.type === extension_types$1.incDec;
    node.operator = this.value;
    node.prefix = true;
    this.next();
    node.argument = this.parseMaybeUnary(null, true, update, forInit);
    this.checkExpressionErrors(refDestructuringErrors, true);
    if (update) { this.checkLValSimple(node.argument); }
    else if (this.strict && node.operator === "delete" && extension_isLocalVariableAccess(node.argument))
      { this.raiseRecoverable(node.start, "Deleting local variable in strict mode"); }
    else if (node.operator === "delete" && extension_isPrivateFieldAccess(node.argument))
      { this.raiseRecoverable(node.start, "Private fields can not be deleted"); }
    else { sawUnary = true; }
    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
  } else if (!sawUnary && this.type === extension_types$1.privateId) {
    if ((forInit || this.privateNameStack.length === 0) && this.options.checkPrivateFields) { this.unexpected(); }
    expr = this.parsePrivateIdent();
    // only could be private fields in 'in', such as #x in obj
    if (this.type !== extension_types$1._in) { this.unexpected(); }
  } else {
    expr = this.parseExprSubscripts(refDestructuringErrors, forInit);
    if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
    while (this.type.postfix && !this.canInsertSemicolon()) {
      var node$1 = this.startNodeAt(startPos, startLoc);
      node$1.operator = this.value;
      node$1.prefix = false;
      node$1.argument = expr;
      this.checkLValSimple(expr);
      this.next();
      expr = this.finishNode(node$1, "UpdateExpression");
    }
  }

  if (!incDec && this.eat(extension_types$1.starstar)) {
    if (sawUnary)
      { this.unexpected(this.lastTokStart); }
    else
      { return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false, false, forInit), "**", false) }
  } else {
    return expr
  }
};

function extension_isLocalVariableAccess(node) {
  return (
    node.type === "Identifier" ||
    node.type === "ParenthesizedExpression" && extension_isLocalVariableAccess(node.expression)
  )
}

function extension_isPrivateFieldAccess(node) {
  return (
    node.type === "MemberExpression" && node.property.type === "PrivateIdentifier" ||
    node.type === "ChainExpression" && extension_isPrivateFieldAccess(node.expression) ||
    node.type === "ParenthesizedExpression" && extension_isPrivateFieldAccess(node.expression)
  )
}

// Parse call, dot, and `[]`-subscript expressions.

extension_pp$5.parseExprSubscripts = function(refDestructuringErrors, forInit) {
  var startPos = this.start, startLoc = this.startLoc;
  var expr = this.parseExprAtom(refDestructuringErrors, forInit);
  if (expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")")
    { return expr }
  var result = this.parseSubscripts(expr, startPos, startLoc, false, forInit);
  if (refDestructuringErrors && result.type === "MemberExpression") {
    if (refDestructuringErrors.parenthesizedAssign >= result.start) { refDestructuringErrors.parenthesizedAssign = -1; }
    if (refDestructuringErrors.parenthesizedBind >= result.start) { refDestructuringErrors.parenthesizedBind = -1; }
    if (refDestructuringErrors.trailingComma >= result.start) { refDestructuringErrors.trailingComma = -1; }
  }
  return result
};

extension_pp$5.parseSubscripts = function(base, startPos, startLoc, noCalls, forInit) {
  var maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" &&
      this.lastTokEnd === base.end && !this.canInsertSemicolon() && base.end - base.start === 5 &&
      this.potentialArrowAt === base.start;
  var optionalChained = false;

  while (true) {
    var element = this.parseSubscript(base, startPos, startLoc, noCalls, maybeAsyncArrow, optionalChained, forInit);

    if (element.optional) { optionalChained = true; }
    if (element === base || element.type === "ArrowFunctionExpression") {
      if (optionalChained) {
        var chainNode = this.startNodeAt(startPos, startLoc);
        chainNode.expression = element;
        element = this.finishNode(chainNode, "ChainExpression");
      }
      return element
    }

    base = element;
  }
};

extension_pp$5.shouldParseAsyncArrow = function() {
  return !this.canInsertSemicolon() && this.eat(extension_types$1.arrow)
};

extension_pp$5.parseSubscriptAsyncArrow = function(startPos, startLoc, exprList, forInit) {
  return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList, true, forInit)
};

extension_pp$5.parseSubscript = function(base, startPos, startLoc, noCalls, maybeAsyncArrow, optionalChained, forInit) {
  var optionalSupported = this.options.ecmaVersion >= 11;
  var optional = optionalSupported && this.eat(extension_types$1.questionDot);
  if (noCalls && optional) { this.raise(this.lastTokStart, "Optional chaining cannot appear in the callee of new expressions"); }

  var computed = this.eat(extension_types$1.bracketL);
  if (computed || (optional && this.type !== extension_types$1.parenL && this.type !== extension_types$1.backQuote) || this.eat(extension_types$1.dot)) {
    var node = this.startNodeAt(startPos, startLoc);
    node.object = base;
    if (computed) {
      node.property = this.parseExpression();
      this.expect(extension_types$1.bracketR);
    } else if (this.type === extension_types$1.privateId && base.type !== "Super") {
      node.property = this.parsePrivateIdent();
    } else {
      node.property = this.parseIdent(this.options.allowReserved !== "never");
    }
    node.computed = !!computed;
    if (optionalSupported) {
      node.optional = optional;
    }
    base = this.finishNode(node, "MemberExpression");
  } else if (!noCalls && this.eat(extension_types$1.parenL)) {
    var refDestructuringErrors = new extension_DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;
    this.yieldPos = 0;
    this.awaitPos = 0;
    this.awaitIdentPos = 0;
    var exprList = this.parseExprList(extension_types$1.parenR, this.options.ecmaVersion >= 8, false, refDestructuringErrors);
    if (maybeAsyncArrow && !optional && this.shouldParseAsyncArrow()) {
      this.checkPatternErrors(refDestructuringErrors, false);
      this.checkYieldAwaitInDefaultParams();
      if (this.awaitIdentPos > 0)
        { this.raise(this.awaitIdentPos, "Cannot use 'await' as identifier inside an async function"); }
      this.yieldPos = oldYieldPos;
      this.awaitPos = oldAwaitPos;
      this.awaitIdentPos = oldAwaitIdentPos;
      return this.parseSubscriptAsyncArrow(startPos, startLoc, exprList, forInit)
    }
    this.checkExpressionErrors(refDestructuringErrors, true);
    this.yieldPos = oldYieldPos || this.yieldPos;
    this.awaitPos = oldAwaitPos || this.awaitPos;
    this.awaitIdentPos = oldAwaitIdentPos || this.awaitIdentPos;
    var node$1 = this.startNodeAt(startPos, startLoc);
    node$1.callee = base;
    node$1.arguments = exprList;
    if (optionalSupported) {
      node$1.optional = optional;
    }
    base = this.finishNode(node$1, "CallExpression");
  } else if (this.type === extension_types$1.backQuote) {
    if (optional || optionalChained) {
      this.raise(this.start, "Optional chaining cannot appear in the tag of tagged template expressions");
    }
    var node$2 = this.startNodeAt(startPos, startLoc);
    node$2.tag = base;
    node$2.quasi = this.parseTemplate({isTagged: true});
    base = this.finishNode(node$2, "TaggedTemplateExpression");
  }
  return base
};

// Parse an atomic expression — either a single token that is an
// expression, an expression started by a keyword like `function` or
// `new`, or an expression wrapped in punctuation like `()`, `[]`,
// or `{}`.

extension_pp$5.parseExprAtom = function(refDestructuringErrors, forInit, forNew) {
  // If a division operator appears in an expression position, the
  // tokenizer got confused, and we force it to read a regexp instead.
  if (this.type === extension_types$1.slash) { this.readRegexp(); }

  var node, canBeArrow = this.potentialArrowAt === this.start;
  switch (this.type) {
  case extension_types$1._super:
    if (!this.allowSuper)
      { this.raise(this.start, "'super' keyword outside a method"); }
    node = this.startNode();
    this.next();
    if (this.type === extension_types$1.parenL && !this.allowDirectSuper)
      { this.raise(node.start, "super() call outside constructor of a subclass"); }
    // The `super` keyword can appear at below:
    // SuperProperty:
    //     super [ Expression ]
    //     super . IdentifierName
    // SuperCall:
    //     super ( Arguments )
    if (this.type !== extension_types$1.dot && this.type !== extension_types$1.bracketL && this.type !== extension_types$1.parenL)
      { this.unexpected(); }
    return this.finishNode(node, "Super")

  case extension_types$1._this:
    node = this.startNode();
    this.next();
    return this.finishNode(node, "ThisExpression")

  case extension_types$1.name:
    var startPos = this.start, startLoc = this.startLoc, containsEsc = this.containsEsc;
    var id = this.parseIdent(false);
    if (this.options.ecmaVersion >= 8 && !containsEsc && id.name === "async" && !this.canInsertSemicolon() && this.eat(extension_types$1._function)) {
      this.overrideContext(extension_types.f_expr);
      return this.parseFunction(this.startNodeAt(startPos, startLoc), 0, false, true, forInit)
    }
    if (canBeArrow && !this.canInsertSemicolon()) {
      if (this.eat(extension_types$1.arrow))
        { return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false, forInit) }
      if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === extension_types$1.name && !containsEsc &&
          (!this.potentialArrowInForAwait || this.value !== "of" || this.containsEsc)) {
        id = this.parseIdent(false);
        if (this.canInsertSemicolon() || !this.eat(extension_types$1.arrow))
          { this.unexpected(); }
        return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true, forInit)
      }
    }
    return id

  case extension_types$1.regexp:
    var value = this.value;
    node = this.parseLiteral(value.value);
    node.regex = {pattern: value.pattern, flags: value.flags};
    return node

  case extension_types$1.num: case extension_types$1.string:
    return this.parseLiteral(this.value)

  case extension_types$1._null: case extension_types$1._true: case extension_types$1._false:
    node = this.startNode();
    node.value = this.type === extension_types$1._null ? null : this.type === extension_types$1._true;
    node.raw = this.type.keyword;
    this.next();
    return this.finishNode(node, "Literal")

  case extension_types$1.parenL:
    var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow, forInit);
    if (refDestructuringErrors) {
      if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr))
        { refDestructuringErrors.parenthesizedAssign = start; }
      if (refDestructuringErrors.parenthesizedBind < 0)
        { refDestructuringErrors.parenthesizedBind = start; }
    }
    return expr

  case extension_types$1.bracketL:
    node = this.startNode();
    this.next();
    node.elements = this.parseExprList(extension_types$1.bracketR, true, true, refDestructuringErrors);
    return this.finishNode(node, "ArrayExpression")

  case extension_types$1.braceL:
    this.overrideContext(extension_types.b_expr);
    return this.parseObj(false, refDestructuringErrors)

  case extension_types$1._function:
    node = this.startNode();
    this.next();
    return this.parseFunction(node, 0)

  case extension_types$1._class:
    return this.parseClass(this.startNode(), false)

  case extension_types$1._new:
    return this.parseNew()

  case extension_types$1.backQuote:
    return this.parseTemplate()

  case extension_types$1._import:
    if (this.options.ecmaVersion >= 11) {
      return this.parseExprImport(forNew)
    } else {
      return this.unexpected()
    }

  default:
    return this.parseExprAtomDefault()
  }
};

extension_pp$5.parseExprAtomDefault = function() {
  this.unexpected();
};

extension_pp$5.parseExprImport = function(forNew) {
  var node = this.startNode();

  // Consume `import` as an identifier for `import.meta`.
  // Because `this.parseIdent(true)` doesn't check escape sequences, it needs the check of `this.containsEsc`.
  if (this.containsEsc) { this.raiseRecoverable(this.start, "Escape sequence in keyword import"); }
  this.next();

  if (this.type === extension_types$1.parenL && !forNew) {
    return this.parseDynamicImport(node)
  } else if (this.type === extension_types$1.dot) {
    var meta = this.startNodeAt(node.start, node.loc && node.loc.start);
    meta.name = "import";
    node.meta = this.finishNode(meta, "Identifier");
    return this.parseImportMeta(node)
  } else {
    this.unexpected();
  }
};

extension_pp$5.parseDynamicImport = function(node) {
  this.next(); // skip `(`

  // Parse node.source.
  node.source = this.parseMaybeAssign();

  if (this.options.ecmaVersion >= 16) {
    if (!this.eat(extension_types$1.parenR)) {
      this.expect(extension_types$1.comma);
      if (!this.afterTrailingComma(extension_types$1.parenR)) {
        node.options = this.parseMaybeAssign();
        if (!this.eat(extension_types$1.parenR)) {
          this.expect(extension_types$1.comma);
          if (!this.afterTrailingComma(extension_types$1.parenR)) {
            this.unexpected();
          }
        }
      } else {
        node.options = null;
      }
    } else {
      node.options = null;
    }
  } else {
    // Verify ending.
    if (!this.eat(extension_types$1.parenR)) {
      var errorPos = this.start;
      if (this.eat(extension_types$1.comma) && this.eat(extension_types$1.parenR)) {
        this.raiseRecoverable(errorPos, "Trailing comma is not allowed in import()");
      } else {
        this.unexpected(errorPos);
      }
    }
  }

  return this.finishNode(node, "ImportExpression")
};

extension_pp$5.parseImportMeta = function(node) {
  this.next(); // skip `.`

  var containsEsc = this.containsEsc;
  node.property = this.parseIdent(true);

  if (node.property.name !== "meta")
    { this.raiseRecoverable(node.property.start, "The only valid meta property for import is 'import.meta'"); }
  if (containsEsc)
    { this.raiseRecoverable(node.start, "'import.meta' must not contain escaped characters"); }
  if (this.options.sourceType !== "module" && !this.options.allowImportExportEverywhere)
    { this.raiseRecoverable(node.start, "Cannot use 'import.meta' outside a module"); }

  return this.finishNode(node, "MetaProperty")
};

extension_pp$5.parseLiteral = function(value) {
  var node = this.startNode();
  node.value = value;
  node.raw = this.input.slice(this.start, this.end);
  if (node.raw.charCodeAt(node.raw.length - 1) === 110) { node.bigint = node.raw.slice(0, -1).replace(/_/g, ""); }
  this.next();
  return this.finishNode(node, "Literal")
};

extension_pp$5.parseParenExpression = function() {
  this.expect(extension_types$1.parenL);
  var val = this.parseExpression();
  this.expect(extension_types$1.parenR);
  return val
};

extension_pp$5.shouldParseArrow = function(exprList) {
  return !this.canInsertSemicolon()
};

extension_pp$5.parseParenAndDistinguishExpression = function(canBeArrow, forInit) {
  var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8;
  if (this.options.ecmaVersion >= 6) {
    this.next();

    var innerStartPos = this.start, innerStartLoc = this.startLoc;
    var exprList = [], first = true, lastIsComma = false;
    var refDestructuringErrors = new extension_DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart;
    this.yieldPos = 0;
    this.awaitPos = 0;
    // Do not save awaitIdentPos to allow checking awaits nested in parameters
    while (this.type !== extension_types$1.parenR) {
      first ? first = false : this.expect(extension_types$1.comma);
      if (allowTrailingComma && this.afterTrailingComma(extension_types$1.parenR, true)) {
        lastIsComma = true;
        break
      } else if (this.type === extension_types$1.ellipsis) {
        spreadStart = this.start;
        exprList.push(this.parseParenItem(this.parseRestBinding()));
        if (this.type === extension_types$1.comma) {
          this.raiseRecoverable(
            this.start,
            "Comma is not permitted after the rest element"
          );
        }
        break
      } else {
        exprList.push(this.parseMaybeAssign(false, refDestructuringErrors, this.parseParenItem));
      }
    }
    var innerEndPos = this.lastTokEnd, innerEndLoc = this.lastTokEndLoc;
    this.expect(extension_types$1.parenR);

    if (canBeArrow && this.shouldParseArrow(exprList) && this.eat(extension_types$1.arrow)) {
      this.checkPatternErrors(refDestructuringErrors, false);
      this.checkYieldAwaitInDefaultParams();
      this.yieldPos = oldYieldPos;
      this.awaitPos = oldAwaitPos;
      return this.parseParenArrowList(startPos, startLoc, exprList, forInit)
    }

    if (!exprList.length || lastIsComma) { this.unexpected(this.lastTokStart); }
    if (spreadStart) { this.unexpected(spreadStart); }
    this.checkExpressionErrors(refDestructuringErrors, true);
    this.yieldPos = oldYieldPos || this.yieldPos;
    this.awaitPos = oldAwaitPos || this.awaitPos;

    if (exprList.length > 1) {
      val = this.startNodeAt(innerStartPos, innerStartLoc);
      val.expressions = exprList;
      this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
    } else {
      val = exprList[0];
    }
  } else {
    val = this.parseParenExpression();
  }

  if (this.options.preserveParens) {
    var par = this.startNodeAt(startPos, startLoc);
    par.expression = val;
    return this.finishNode(par, "ParenthesizedExpression")
  } else {
    return val
  }
};

extension_pp$5.parseParenItem = function(item) {
  return item
};

extension_pp$5.parseParenArrowList = function(startPos, startLoc, exprList, forInit) {
  return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList, false, forInit)
};

// New's precedence is slightly tricky. It must allow its argument to
// be a `[]` or dot subscript expression, but not a call — at least,
// not without wrapping it in parentheses. Thus, it uses the noCalls
// argument to parseSubscripts to prevent it from consuming the
// argument list.

var extension_acorn_empty = [];

extension_pp$5.parseNew = function() {
  if (this.containsEsc) { this.raiseRecoverable(this.start, "Escape sequence in keyword new"); }
  var node = this.startNode();
  this.next();
  if (this.options.ecmaVersion >= 6 && this.type === extension_types$1.dot) {
    var meta = this.startNodeAt(node.start, node.loc && node.loc.start);
    meta.name = "new";
    node.meta = this.finishNode(meta, "Identifier");
    this.next();
    var containsEsc = this.containsEsc;
    node.property = this.parseIdent(true);
    if (node.property.name !== "target")
      { this.raiseRecoverable(node.property.start, "The only valid meta property for new is 'new.target'"); }
    if (containsEsc)
      { this.raiseRecoverable(node.start, "'new.target' must not contain escaped characters"); }
    if (!this.allowNewDotTarget)
      { this.raiseRecoverable(node.start, "'new.target' can only be used in functions and class static block"); }
    return this.finishNode(node, "MetaProperty")
  }
  var startPos = this.start, startLoc = this.startLoc;
  node.callee = this.parseSubscripts(this.parseExprAtom(null, false, true), startPos, startLoc, true, false);
  if (this.eat(extension_types$1.parenL)) { node.arguments = this.parseExprList(extension_types$1.parenR, this.options.ecmaVersion >= 8, false); }
  else { node.arguments = extension_acorn_empty; }
  return this.finishNode(node, "NewExpression")
};

// Parse template expression.

extension_pp$5.parseTemplateElement = function(ref) {
  var isTagged = ref.isTagged;

  var elem = this.startNode();
  if (this.type === extension_types$1.invalidTemplate) {
    if (!isTagged) {
      this.raiseRecoverable(this.start, "Bad escape sequence in untagged template literal");
    }
    elem.value = {
      raw: this.value.replace(/\r\n?/g, "\n"),
      cooked: null
    };
  } else {
    elem.value = {
      raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"),
      cooked: this.value
    };
  }
  this.next();
  elem.tail = this.type === extension_types$1.backQuote;
  return this.finishNode(elem, "TemplateElement")
};

extension_pp$5.parseTemplate = function(ref) {
  if ( ref === void 0 ) ref = {};
  var isTagged = ref.isTagged; if ( isTagged === void 0 ) isTagged = false;

  var node = this.startNode();
  this.next();
  node.expressions = [];
  var curElt = this.parseTemplateElement({isTagged: isTagged});
  node.quasis = [curElt];
  while (!curElt.tail) {
    if (this.type === extension_types$1.eof) { this.raise(this.pos, "Unterminated template literal"); }
    this.expect(extension_types$1.dollarBraceL);
    node.expressions.push(this.parseExpression());
    this.expect(extension_types$1.braceR);
    node.quasis.push(curElt = this.parseTemplateElement({isTagged: isTagged}));
  }
  this.next();
  return this.finishNode(node, "TemplateLiteral")
};

extension_pp$5.isAsyncProp = function(prop) {
  return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" &&
    (this.type === extension_types$1.name || this.type === extension_types$1.num || this.type === extension_types$1.string || this.type === extension_types$1.bracketL || this.type.keyword || (this.options.ecmaVersion >= 9 && this.type === extension_types$1.star)) &&
    !extension_lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
};

// Parse an object literal or binding pattern.

extension_pp$5.parseObj = function(isPattern, refDestructuringErrors) {
  var node = this.startNode(), first = true, propHash = {};
  node.properties = [];
  this.next();
  while (!this.eat(extension_types$1.braceR)) {
    if (!first) {
      this.expect(extension_types$1.comma);
      if (this.options.ecmaVersion >= 5 && this.afterTrailingComma(extension_types$1.braceR)) { break }
    } else { first = false; }

    var prop = this.parseProperty(isPattern, refDestructuringErrors);
    if (!isPattern) { this.checkPropClash(prop, propHash, refDestructuringErrors); }
    node.properties.push(prop);
  }
  return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
};

extension_pp$5.parseProperty = function(isPattern, refDestructuringErrors) {
  var prop = this.startNode(), isGenerator, isAsync, startPos, startLoc;
  if (this.options.ecmaVersion >= 9 && this.eat(extension_types$1.ellipsis)) {
    if (isPattern) {
      prop.argument = this.parseIdent(false);
      if (this.type === extension_types$1.comma) {
        this.raiseRecoverable(this.start, "Comma is not permitted after the rest element");
      }
      return this.finishNode(prop, "RestElement")
    }
    // Parse argument.
    prop.argument = this.parseMaybeAssign(false, refDestructuringErrors);
    // To disallow trailing comma via `this.toAssignable()`.
    if (this.type === extension_types$1.comma && refDestructuringErrors && refDestructuringErrors.trailingComma < 0) {
      refDestructuringErrors.trailingComma = this.start;
    }
    // Finish
    return this.finishNode(prop, "SpreadElement")
  }
  if (this.options.ecmaVersion >= 6) {
    prop.method = false;
    prop.shorthand = false;
    if (isPattern || refDestructuringErrors) {
      startPos = this.start;
      startLoc = this.startLoc;
    }
    if (!isPattern)
      { isGenerator = this.eat(extension_types$1.star); }
  }
  var containsEsc = this.containsEsc;
  this.parsePropertyName(prop);
  if (!isPattern && !containsEsc && this.options.ecmaVersion >= 8 && !isGenerator && this.isAsyncProp(prop)) {
    isAsync = true;
    isGenerator = this.options.ecmaVersion >= 9 && this.eat(extension_types$1.star);
    this.parsePropertyName(prop);
  } else {
    isAsync = false;
  }
  this.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc);
  return this.finishNode(prop, "Property")
};

extension_pp$5.parseGetterSetter = function(prop) {
  prop.kind = prop.key.name;
  this.parsePropertyName(prop);
  prop.value = this.parseMethod(false);
  var paramCount = prop.kind === "get" ? 0 : 1;
  if (prop.value.params.length !== paramCount) {
    var start = prop.value.start;
    if (prop.kind === "get")
      { this.raiseRecoverable(start, "getter should have no params"); }
    else
      { this.raiseRecoverable(start, "setter should have exactly one param"); }
  } else {
    if (prop.kind === "set" && prop.value.params[0].type === "RestElement")
      { this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params"); }
  }
};

extension_pp$5.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc) {
  if ((isGenerator || isAsync) && this.type === extension_types$1.colon)
    { this.unexpected(); }

  if (this.eat(extension_types$1.colon)) {
    prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors);
    prop.kind = "init";
  } else if (this.options.ecmaVersion >= 6 && this.type === extension_types$1.parenL) {
    if (isPattern) { this.unexpected(); }
    prop.kind = "init";
    prop.method = true;
    prop.value = this.parseMethod(isGenerator, isAsync);
  } else if (!isPattern && !containsEsc &&
             this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
             (prop.key.name === "get" || prop.key.name === "set") &&
             (this.type !== extension_types$1.comma && this.type !== extension_types$1.braceR && this.type !== extension_types$1.eq)) {
    if (isGenerator || isAsync) { this.unexpected(); }
    this.parseGetterSetter(prop);
  } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
    if (isGenerator || isAsync) { this.unexpected(); }
    this.checkUnreserved(prop.key);
    if (prop.key.name === "await" && !this.awaitIdentPos)
      { this.awaitIdentPos = startPos; }
    prop.kind = "init";
    if (isPattern) {
      prop.value = this.parseMaybeDefault(startPos, startLoc, this.copyNode(prop.key));
    } else if (this.type === extension_types$1.eq && refDestructuringErrors) {
      if (refDestructuringErrors.shorthandAssign < 0)
        { refDestructuringErrors.shorthandAssign = this.start; }
      prop.value = this.parseMaybeDefault(startPos, startLoc, this.copyNode(prop.key));
    } else {
      prop.value = this.copyNode(prop.key);
    }
    prop.shorthand = true;
  } else { this.unexpected(); }
};

extension_pp$5.parsePropertyName = function(prop) {
  if (this.options.ecmaVersion >= 6) {
    if (this.eat(extension_types$1.bracketL)) {
      prop.computed = true;
      prop.key = this.parseMaybeAssign();
      this.expect(extension_types$1.bracketR);
      return prop.key
    } else {
      prop.computed = false;
    }
  }
  return prop.key = this.type === extension_types$1.num || this.type === extension_types$1.string ? this.parseExprAtom() : this.parseIdent(this.options.allowReserved !== "never")
};

// Initialize empty function node.

extension_pp$5.initFunction = function(node) {
  node.id = null;
  if (this.options.ecmaVersion >= 6) { node.generator = node.expression = false; }
  if (this.options.ecmaVersion >= 8) { node.async = false; }
};

// Parse object or class method.

extension_pp$5.parseMethod = function(isGenerator, isAsync, allowDirectSuper) {
  var node = this.startNode(), oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;

  this.initFunction(node);
  if (this.options.ecmaVersion >= 6)
    { node.generator = isGenerator; }
  if (this.options.ecmaVersion >= 8)
    { node.async = !!isAsync; }

  this.yieldPos = 0;
  this.awaitPos = 0;
  this.awaitIdentPos = 0;
  this.enterScope(extension_functionFlags(isAsync, node.generator) | extension_SCOPE_SUPER | (allowDirectSuper ? extension_SCOPE_DIRECT_SUPER : 0));

  this.expect(extension_types$1.parenL);
  node.params = this.parseBindingList(extension_types$1.parenR, false, this.options.ecmaVersion >= 8);
  this.checkYieldAwaitInDefaultParams();
  this.parseFunctionBody(node, false, true, false);

  this.yieldPos = oldYieldPos;
  this.awaitPos = oldAwaitPos;
  this.awaitIdentPos = oldAwaitIdentPos;
  return this.finishNode(node, "FunctionExpression")
};

// Parse arrow function expression with given parameters.

extension_pp$5.parseArrowExpression = function(node, params, isAsync, forInit) {
  var oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;

  this.enterScope(extension_functionFlags(isAsync, false) | extension_SCOPE_ARROW);
  this.initFunction(node);
  if (this.options.ecmaVersion >= 8) { node.async = !!isAsync; }

  this.yieldPos = 0;
  this.awaitPos = 0;
  this.awaitIdentPos = 0;

  node.params = this.toAssignableList(params, true);
  this.parseFunctionBody(node, true, false, forInit);

  this.yieldPos = oldYieldPos;
  this.awaitPos = oldAwaitPos;
  this.awaitIdentPos = oldAwaitIdentPos;
  return this.finishNode(node, "ArrowFunctionExpression")
};

// Parse function body and check parameters.

extension_pp$5.parseFunctionBody = function(node, isArrowFunction, isMethod, forInit) {
  var isExpression = isArrowFunction && this.type !== extension_types$1.braceL;
  var oldStrict = this.strict, useStrict = false;

  if (isExpression) {
    node.body = this.parseMaybeAssign(forInit);
    node.expression = true;
    this.checkParams(node, false);
  } else {
    var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params);
    if (!oldStrict || nonSimple) {
      useStrict = this.strictDirective(this.end);
      // If this is a strict mode function, verify that argument names
      // are not repeated, and it does not try to bind the words `eval`
      // or `arguments`.
      if (useStrict && nonSimple)
        { this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list"); }
    }
    // Start a new scope with regard to labels and the `inFunction`
    // flag (restore them to their old value afterwards).
    var oldLabels = this.labels;
    this.labels = [];
    if (useStrict) { this.strict = true; }

    // Add the params to varDeclaredNames to ensure that an error is thrown
    // if a let/const declaration in the function clashes with one of the params.
    this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && !isMethod && this.isSimpleParamList(node.params));
    // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval'
    if (this.strict && node.id) { this.checkLValSimple(node.id, extension_BIND_OUTSIDE); }
    node.body = this.parseBlock(false, undefined, useStrict && !oldStrict);
    node.expression = false;
    this.adaptDirectivePrologue(node.body.body);
    this.labels = oldLabels;
  }
  this.exitScope();
};

extension_pp$5.isSimpleParamList = function(params) {
  for (var i = 0, list = params; i < list.length; i += 1)
    {
    var param = list[i];

    if (param.type !== "Identifier") { return false
  } }
  return true
};

// Checks function params for various disallowed patterns such as using "eval"
// or "arguments" and duplicate parameters.

extension_pp$5.checkParams = function(node, allowDuplicates) {
  var nameHash = Object.create(null);
  for (var i = 0, list = node.params; i < list.length; i += 1)
    {
    var param = list[i];

    this.checkLValInnerPattern(param, extension_BIND_VAR, allowDuplicates ? null : nameHash);
  }
};

// Parses a comma-separated list of expressions, and returns them as
// an array. `close` is the token type that ends the list, and
// `allowEmpty` can be turned on to allow subsequent commas with
// nothing in between them to be parsed as `null` (which is needed
// for array literals).

extension_pp$5.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {
  var elts = [], first = true;
  while (!this.eat(close)) {
    if (!first) {
      this.expect(extension_types$1.comma);
      if (allowTrailingComma && this.afterTrailingComma(close)) { break }
    } else { first = false; }

    var elt = (void 0);
    if (allowEmpty && this.type === extension_types$1.comma)
      { elt = null; }
    else if (this.type === extension_types$1.ellipsis) {
      elt = this.parseSpread(refDestructuringErrors);
      if (refDestructuringErrors && this.type === extension_types$1.comma && refDestructuringErrors.trailingComma < 0)
        { refDestructuringErrors.trailingComma = this.start; }
    } else {
      elt = this.parseMaybeAssign(false, refDestructuringErrors);
    }
    elts.push(elt);
  }
  return elts
};

extension_pp$5.checkUnreserved = function(ref) {
  var start = ref.start;
  var end = ref.end;
  var name = ref.name;

  if (this.inGenerator && name === "yield")
    { this.raiseRecoverable(start, "Cannot use 'yield' as identifier inside a generator"); }
  if (this.inAsync && name === "await")
    { this.raiseRecoverable(start, "Cannot use 'await' as identifier inside an async function"); }
  if (this.currentThisScope().inClassFieldInit && name === "arguments")
    { this.raiseRecoverable(start, "Cannot use 'arguments' in class field initializer"); }
  if (this.inClassStaticBlock && (name === "arguments" || name === "await"))
    { this.raise(start, ("Cannot use " + name + " in class static initialization block")); }
  if (this.keywords.test(name))
    { this.raise(start, ("Unexpected keyword '" + name + "'")); }
  if (this.options.ecmaVersion < 6 &&
    this.input.slice(start, end).indexOf("\\") !== -1) { return }
  var re = this.strict ? this.reservedWordsStrict : this.reservedWords;
  if (re.test(name)) {
    if (!this.inAsync && name === "await")
      { this.raiseRecoverable(start, "Cannot use keyword 'await' outside an async function"); }
    this.raiseRecoverable(start, ("The keyword '" + name + "' is reserved"));
  }
};

// Parse the next token as an identifier. If `liberal` is true (used
// when parsing properties), it will also convert keywords into
// identifiers.

extension_pp$5.parseIdent = function(liberal) {
  var node = this.parseIdentNode();
  this.next(!!liberal);
  this.finishNode(node, "Identifier");
  if (!liberal) {
    this.checkUnreserved(node);
    if (node.name === "await" && !this.awaitIdentPos)
      { this.awaitIdentPos = node.start; }
  }
  return node
};

extension_pp$5.parseIdentNode = function() {
  var node = this.startNode();
  if (this.type === extension_types$1.name) {
    node.name = this.value;
  } else if (this.type.keyword) {
    node.name = this.type.keyword;

    // To fix https://github.com/acornjs/acorn/issues/575
    // `class` and `function` keywords push new context into this.context.
    // But there is no chance to pop the context if the keyword is consumed as an identifier such as a property name.
    // If the previous token is a dot, this does not apply because the context-managing code already ignored the keyword
    if ((node.name === "class" || node.name === "function") &&
      (this.lastTokEnd !== this.lastTokStart + 1 || this.input.charCodeAt(this.lastTokStart) !== 46)) {
      this.context.pop();
    }
    this.type = extension_types$1.name;
  } else {
    this.unexpected();
  }
  return node
};

extension_pp$5.parsePrivateIdent = function() {
  var node = this.startNode();
  if (this.type === extension_types$1.privateId) {
    node.name = this.value;
  } else {
    this.unexpected();
  }
  this.next();
  this.finishNode(node, "PrivateIdentifier");

  // For validating existence
  if (this.options.checkPrivateFields) {
    if (this.privateNameStack.length === 0) {
      this.raise(node.start, ("Private field '#" + (node.name) + "' must be declared in an enclosing class"));
    } else {
      this.privateNameStack[this.privateNameStack.length - 1].used.push(node);
    }
  }

  return node
};

// Parses yield expression inside generator.

extension_pp$5.parseYield = function(forInit) {
  if (!this.yieldPos) { this.yieldPos = this.start; }

  var node = this.startNode();
  this.next();
  if (this.type === extension_types$1.semi || this.canInsertSemicolon() || (this.type !== extension_types$1.star && !this.type.startsExpr)) {
    node.delegate = false;
    node.argument = null;
  } else {
    node.delegate = this.eat(extension_types$1.star);
    node.argument = this.parseMaybeAssign(forInit);
  }
  return this.finishNode(node, "YieldExpression")
};

extension_pp$5.parseAwait = function(forInit) {
  if (!this.awaitPos) { this.awaitPos = this.start; }

  var node = this.startNode();
  this.next();
  node.argument = this.parseMaybeUnary(null, true, false, forInit);
  return this.finishNode(node, "AwaitExpression")
};

var extension_pp$4 = extension_Parser.prototype;

// This function is used to raise exceptions on parse errors. It
// takes an offset integer (into the current `input`) to indicate
// the location of the error, attaches the position to the end
// of the error message, and then raises a `SyntaxError` with that
// message.

extension_pp$4.raise = function(pos, message) {
  var loc = extension_getLineInfo(this.input, pos);
  message += " (" + loc.line + ":" + loc.column + ")";
  var err = new SyntaxError(message);
  err.pos = pos; err.loc = loc; err.raisedAt = this.pos;
  throw err
};

extension_pp$4.raiseRecoverable = extension_pp$4.raise;

extension_pp$4.curPosition = function() {
  if (this.options.locations) {
    return new extension_Position(this.curLine, this.pos - this.lineStart)
  }
};

var extension_pp$3 = extension_Parser.prototype;

var extension_Scope = function Scope(flags) {
  this.flags = flags;
  // A list of var-declared names in the current lexical scope
  this.var = [];
  // A list of lexically-declared names in the current lexical scope
  this.lexical = [];
  // A list of lexically-declared FunctionDeclaration names in the current lexical scope
  this.functions = [];
  // A switch to disallow the identifier reference 'arguments'
  this.inClassFieldInit = false;
};

// The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names.

extension_pp$3.enterScope = function(flags) {
  this.scopeStack.push(new extension_Scope(flags));
};

extension_pp$3.exitScope = function() {
  this.scopeStack.pop();
};

// The spec says:
// > At the top level of a function, or script, function declarations are
// > treated like var declarations rather than like lexical declarations.
extension_pp$3.treatFunctionsAsVarInScope = function(scope) {
  return (scope.flags & extension_SCOPE_FUNCTION) || !this.inModule && (scope.flags & extension_SCOPE_TOP)
};

extension_pp$3.declareName = function(name, bindingType, pos) {
  var redeclared = false;
  if (bindingType === extension_BIND_LEXICAL) {
    var scope = this.currentScope();
    redeclared = scope.lexical.indexOf(name) > -1 || scope.functions.indexOf(name) > -1 || scope.var.indexOf(name) > -1;
    scope.lexical.push(name);
    if (this.inModule && (scope.flags & extension_SCOPE_TOP))
      { delete this.undefinedExports[name]; }
  } else if (bindingType === extension_BIND_SIMPLE_CATCH) {
    var scope$1 = this.currentScope();
    scope$1.lexical.push(name);
  } else if (bindingType === extension_BIND_FUNCTION) {
    var scope$2 = this.currentScope();
    if (this.treatFunctionsAsVar)
      { redeclared = scope$2.lexical.indexOf(name) > -1; }
    else
      { redeclared = scope$2.lexical.indexOf(name) > -1 || scope$2.var.indexOf(name) > -1; }
    scope$2.functions.push(name);
  } else {
    for (var i = this.scopeStack.length - 1; i >= 0; --i) {
      var scope$3 = this.scopeStack[i];
      if (scope$3.lexical.indexOf(name) > -1 && !((scope$3.flags & extension_SCOPE_SIMPLE_CATCH) && scope$3.lexical[0] === name) ||
          !this.treatFunctionsAsVarInScope(scope$3) && scope$3.functions.indexOf(name) > -1) {
        redeclared = true;
        break
      }
      scope$3.var.push(name);
      if (this.inModule && (scope$3.flags & extension_SCOPE_TOP))
        { delete this.undefinedExports[name]; }
      if (scope$3.flags & extension_SCOPE_VAR) { break }
    }
  }
  if (redeclared) { this.raiseRecoverable(pos, ("Identifier '" + name + "' has already been declared")); }
};

extension_pp$3.checkLocalExport = function(id) {
  // scope.functions must be empty as Module code is always strict.
  if (this.scopeStack[0].lexical.indexOf(id.name) === -1 &&
      this.scopeStack[0].var.indexOf(id.name) === -1) {
    this.undefinedExports[id.name] = id;
  }
};

extension_pp$3.currentScope = function() {
  return this.scopeStack[this.scopeStack.length - 1]
};

extension_pp$3.currentVarScope = function() {
  for (var i = this.scopeStack.length - 1;; i--) {
    var scope = this.scopeStack[i];
    if (scope.flags & extension_SCOPE_VAR) { return scope }
  }
};

// Could be useful for `this`, `new.target`, `super()`, `super.property`, and `super[property]`.
extension_pp$3.currentThisScope = function() {
  for (var i = this.scopeStack.length - 1;; i--) {
    var scope = this.scopeStack[i];
    if (scope.flags & extension_SCOPE_VAR && !(scope.flags & extension_SCOPE_ARROW)) { return scope }
  }
};

var extension_Node = function Node(parser, pos, loc) {
  this.type = "";
  this.start = pos;
  this.end = 0;
  if (parser.options.locations)
    { this.loc = new extension_SourceLocation(parser, loc); }
  if (parser.options.directSourceFile)
    { this.sourceFile = parser.options.directSourceFile; }
  if (parser.options.ranges)
    { this.range = [pos, 0]; }
};

// Start an AST node, attaching a start offset.

var extension_pp$2 = extension_Parser.prototype;

extension_pp$2.startNode = function() {
  return new extension_Node(this, this.start, this.startLoc)
};

extension_pp$2.startNodeAt = function(pos, loc) {
  return new extension_Node(this, pos, loc)
};

// Finish an AST node, adding `type` and `end` properties.

function extension_finishNodeAt(node, type, pos, loc) {
  node.type = type;
  node.end = pos;
  if (this.options.locations)
    { node.loc.end = loc; }
  if (this.options.ranges)
    { node.range[1] = pos; }
  return node
}

extension_pp$2.finishNode = function(node, type) {
  return extension_finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)
};

// Finish node at given position

extension_pp$2.finishNodeAt = function(node, type, pos, loc) {
  return extension_finishNodeAt.call(this, node, type, pos, loc)
};

extension_pp$2.copyNode = function(node) {
  var newNode = new extension_Node(this, node.start, this.startLoc);
  for (var prop in node) { newNode[prop] = node[prop]; }
  return newNode
};

// This file was generated by "bin/generate-unicode-script-values.js". Do not modify manually!
var extension_scriptValuesAddedInUnicode = "Gara Garay Gukh Gurung_Khema Hrkt Katakana_Or_Hiragana Kawi Kirat_Rai Krai Nag_Mundari Nagm Ol_Onal Onao Sunu Sunuwar Todhri Todr Tulu_Tigalari Tutg Unknown Zzzz";

// This file contains Unicode properties extracted from the ECMAScript specification.
// The lists are extracted like so:
// $$('#table-binary-unicode-properties > figure > table > tbody > tr > td:nth-child(1) code').map(el => el.innerText)

// #table-binary-unicode-properties
var extension_ecma9BinaryProperties = "ASCII ASCII_Hex_Digit AHex Alphabetic Alpha Any Assigned Bidi_Control Bidi_C Bidi_Mirrored Bidi_M Case_Ignorable CI Cased Changes_When_Casefolded CWCF Changes_When_Casemapped CWCM Changes_When_Lowercased CWL Changes_When_NFKC_Casefolded CWKCF Changes_When_Titlecased CWT Changes_When_Uppercased CWU Dash Default_Ignorable_Code_Point DI Deprecated Dep Diacritic Dia Emoji Emoji_Component Emoji_Modifier Emoji_Modifier_Base Emoji_Presentation Extender Ext Grapheme_Base Gr_Base Grapheme_Extend Gr_Ext Hex_Digit Hex IDS_Binary_Operator IDSB IDS_Trinary_Operator IDST ID_Continue IDC ID_Start IDS Ideographic Ideo Join_Control Join_C Logical_Order_Exception LOE Lowercase Lower Math Noncharacter_Code_Point NChar Pattern_Syntax Pat_Syn Pattern_White_Space Pat_WS Quotation_Mark QMark Radical Regional_Indicator RI Sentence_Terminal STerm Soft_Dotted SD Terminal_Punctuation Term Unified_Ideograph UIdeo Uppercase Upper Variation_Selector VS White_Space space XID_Continue XIDC XID_Start XIDS";
var extension_ecma10BinaryProperties = extension_ecma9BinaryProperties + " Extended_Pictographic";
var extension_ecma11BinaryProperties = extension_ecma10BinaryProperties;
var extension_ecma12BinaryProperties = extension_ecma11BinaryProperties + " EBase EComp EMod EPres ExtPict";
var extension_ecma13BinaryProperties = extension_ecma12BinaryProperties;
var extension_ecma14BinaryProperties = extension_ecma13BinaryProperties;

var extension_unicodeBinaryProperties = {
  9: extension_ecma9BinaryProperties,
  10: extension_ecma10BinaryProperties,
  11: extension_ecma11BinaryProperties,
  12: extension_ecma12BinaryProperties,
  13: extension_ecma13BinaryProperties,
  14: extension_ecma14BinaryProperties
};

// #table-binary-unicode-properties-of-strings
var extension_ecma14BinaryPropertiesOfStrings = "Basic_Emoji Emoji_Keycap_Sequence RGI_Emoji_Modifier_Sequence RGI_Emoji_Flag_Sequence RGI_Emoji_Tag_Sequence RGI_Emoji_ZWJ_Sequence RGI_Emoji";

var extension_unicodeBinaryPropertiesOfStrings = {
  9: "",
  10: "",
  11: "",
  12: "",
  13: "",
  14: extension_ecma14BinaryPropertiesOfStrings
};

// #table-unicode-general-category-values
var extension_unicodeGeneralCategoryValues = "Cased_Letter LC Close_Punctuation Pe Connector_Punctuation Pc Control Cc cntrl Currency_Symbol Sc Dash_Punctuation Pd Decimal_Number Nd digit Enclosing_Mark Me Final_Punctuation Pf Format Cf Initial_Punctuation Pi Letter L Letter_Number Nl Line_Separator Zl Lowercase_Letter Ll Mark M Combining_Mark Math_Symbol Sm Modifier_Letter Lm Modifier_Symbol Sk Nonspacing_Mark Mn Number N Open_Punctuation Ps Other C Other_Letter Lo Other_Number No Other_Punctuation Po Other_Symbol So Paragraph_Separator Zp Private_Use Co Punctuation P punct Separator Z Space_Separator Zs Spacing_Mark Mc Surrogate Cs Symbol S Titlecase_Letter Lt Unassigned Cn Uppercase_Letter Lu";

// #table-unicode-script-values
var extension_ecma9ScriptValues = "Adlam Adlm Ahom Anatolian_Hieroglyphs Hluw Arabic Arab Armenian Armn Avestan Avst Balinese Bali Bamum Bamu Bassa_Vah Bass Batak Batk Bengali Beng Bhaiksuki Bhks Bopomofo Bopo Brahmi Brah Braille Brai Buginese Bugi Buhid Buhd Canadian_Aboriginal Cans Carian Cari Caucasian_Albanian Aghb Chakma Cakm Cham Cham Cherokee Cher Common Zyyy Coptic Copt Qaac Cuneiform Xsux Cypriot Cprt Cyrillic Cyrl Deseret Dsrt Devanagari Deva Duployan Dupl Egyptian_Hieroglyphs Egyp Elbasan Elba Ethiopic Ethi Georgian Geor Glagolitic Glag Gothic Goth Grantha Gran Greek Grek Gujarati Gujr Gurmukhi Guru Han Hani Hangul Hang Hanunoo Hano Hatran Hatr Hebrew Hebr Hiragana Hira Imperial_Aramaic Armi Inherited Zinh Qaai Inscriptional_Pahlavi Phli Inscriptional_Parthian Prti Javanese Java Kaithi Kthi Kannada Knda Katakana Kana Kayah_Li Kali Kharoshthi Khar Khmer Khmr Khojki Khoj Khudawadi Sind Lao Laoo Latin Latn Lepcha Lepc Limbu Limb Linear_A Lina Linear_B Linb Lisu Lisu Lycian Lyci Lydian Lydi Mahajani Mahj Malayalam Mlym Mandaic Mand Manichaean Mani Marchen Marc Masaram_Gondi Gonm Meetei_Mayek Mtei Mende_Kikakui Mend Meroitic_Cursive Merc Meroitic_Hieroglyphs Mero Miao Plrd Modi Mongolian Mong Mro Mroo Multani Mult Myanmar Mymr Nabataean Nbat New_Tai_Lue Talu Newa Newa Nko Nkoo Nushu Nshu Ogham Ogam Ol_Chiki Olck Old_Hungarian Hung Old_Italic Ital Old_North_Arabian Narb Old_Permic Perm Old_Persian Xpeo Old_South_Arabian Sarb Old_Turkic Orkh Oriya Orya Osage Osge Osmanya Osma Pahawh_Hmong Hmng Palmyrene Palm Pau_Cin_Hau Pauc Phags_Pa Phag Phoenician Phnx Psalter_Pahlavi Phlp Rejang Rjng Runic Runr Samaritan Samr Saurashtra Saur Sharada Shrd Shavian Shaw Siddham Sidd SignWriting Sgnw Sinhala Sinh Sora_Sompeng Sora Soyombo Soyo Sundanese Sund Syloti_Nagri Sylo Syriac Syrc Tagalog Tglg Tagbanwa Tagb Tai_Le Tale Tai_Tham Lana Tai_Viet Tavt Takri Takr Tamil Taml Tangut Tang Telugu Telu Thaana Thaa Thai Thai Tibetan Tibt Tifinagh Tfng Tirhuta Tirh Ugaritic Ugar Vai Vaii Warang_Citi Wara Yi Yiii Zanabazar_Square Zanb";
var extension_ecma10ScriptValues = extension_ecma9ScriptValues + " Dogra Dogr Gunjala_Gondi Gong Hanifi_Rohingya Rohg Makasar Maka Medefaidrin Medf Old_Sogdian Sogo Sogdian Sogd";
var extension_ecma11ScriptValues = extension_ecma10ScriptValues + " Elymaic Elym Nandinagari Nand Nyiakeng_Puachue_Hmong Hmnp Wancho Wcho";
var extension_ecma12ScriptValues = extension_ecma11ScriptValues + " Chorasmian Chrs Diak Dives_Akuru Khitan_Small_Script Kits Yezi Yezidi";
var extension_ecma13ScriptValues = extension_ecma12ScriptValues + " Cypro_Minoan Cpmn Old_Uyghur Ougr Tangsa Tnsa Toto Vithkuqi Vith";
var extension_ecma14ScriptValues = extension_ecma13ScriptValues + " " + extension_scriptValuesAddedInUnicode;

var extension_unicodeScriptValues = {
  9: extension_ecma9ScriptValues,
  10: extension_ecma10ScriptValues,
  11: extension_ecma11ScriptValues,
  12: extension_ecma12ScriptValues,
  13: extension_ecma13ScriptValues,
  14: extension_ecma14ScriptValues
};

var extension_acorn_data = {};
function extension_buildUnicodeData(ecmaVersion) {
  var d = extension_acorn_data[ecmaVersion] = {
    binary: extension_wordsRegexp(extension_unicodeBinaryProperties[ecmaVersion] + " " + extension_unicodeGeneralCategoryValues),
    binaryOfStrings: extension_wordsRegexp(extension_unicodeBinaryPropertiesOfStrings[ecmaVersion]),
    nonBinary: {
      General_Category: extension_wordsRegexp(extension_unicodeGeneralCategoryValues),
      Script: extension_wordsRegexp(extension_unicodeScriptValues[ecmaVersion])
    }
  };
  d.nonBinary.Script_Extensions = d.nonBinary.Script;

  d.nonBinary.gc = d.nonBinary.General_Category;
  d.nonBinary.sc = d.nonBinary.Script;
  d.nonBinary.scx = d.nonBinary.Script_Extensions;
}

for (var extension_i = 0, extension_acorn_list = [9, 10, 11, 12, 13, 14]; extension_i < extension_acorn_list.length; extension_i += 1) {
  var extension_ecmaVersion = extension_acorn_list[extension_i];

  extension_buildUnicodeData(extension_ecmaVersion);
}

var extension_pp$1 = extension_Parser.prototype;

// Track disjunction structure to determine whether a duplicate
// capture group name is allowed because it is in a separate branch.
var extension_BranchID = function BranchID(parent, base) {
  // Parent disjunction branch
  this.parent = parent;
  // Identifies this set of sibling branches
  this.base = base || this;
};

extension_BranchID.prototype.separatedFrom = function separatedFrom (alt) {
  // A branch is separate from another branch if they or any of
  // their parents are siblings in a given disjunction
  for (var self = this; self; self = self.parent) {
    for (var other = alt; other; other = other.parent) {
      if (self.base === other.base && self !== other) { return true }
    }
  }
  return false
};

extension_BranchID.prototype.sibling = function sibling () {
  return new extension_BranchID(this.parent, this.base)
};

var extension_RegExpValidationState = function RegExpValidationState(parser) {
  this.parser = parser;
  this.validFlags = "gim" + (parser.options.ecmaVersion >= 6 ? "uy" : "") + (parser.options.ecmaVersion >= 9 ? "s" : "") + (parser.options.ecmaVersion >= 13 ? "d" : "") + (parser.options.ecmaVersion >= 15 ? "v" : "");
  this.unicodeProperties = extension_acorn_data[parser.options.ecmaVersion >= 14 ? 14 : parser.options.ecmaVersion];
  this.source = "";
  this.flags = "";
  this.start = 0;
  this.switchU = false;
  this.switchV = false;
  this.switchN = false;
  this.pos = 0;
  this.lastIntValue = 0;
  this.lastStringValue = "";
  this.lastAssertionIsQuantifiable = false;
  this.numCapturingParens = 0;
  this.maxBackReference = 0;
  this.groupNames = Object.create(null);
  this.backReferenceNames = [];
  this.branchID = null;
};

extension_RegExpValidationState.prototype.reset = function reset (start, pattern, flags) {
  var unicodeSets = flags.indexOf("v") !== -1;
  var unicode = flags.indexOf("u") !== -1;
  this.start = start | 0;
  this.source = pattern + "";
  this.flags = flags;
  if (unicodeSets && this.parser.options.ecmaVersion >= 15) {
    this.switchU = true;
    this.switchV = true;
    this.switchN = true;
  } else {
    this.switchU = unicode && this.parser.options.ecmaVersion >= 6;
    this.switchV = false;
    this.switchN = unicode && this.parser.options.ecmaVersion >= 9;
  }
};

extension_RegExpValidationState.prototype.raise = function raise (message) {
  this.parser.raiseRecoverable(this.start, ("Invalid regular expression: /" + (this.source) + "/: " + message));
};

// If u flag is given, this returns the code point at the index (it combines a surrogate pair).
// Otherwise, this returns the code unit of the index (can be a part of a surrogate pair).
extension_RegExpValidationState.prototype.at = function at (i, forceU) {
    if ( forceU === void 0 ) forceU = false;

  var s = this.source;
  var l = s.length;
  if (i >= l) {
    return -1
  }
  var c = s.charCodeAt(i);
  if (!(forceU || this.switchU) || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) {
    return c
  }
  var next = s.charCodeAt(i + 1);
  return next >= 0xDC00 && next <= 0xDFFF ? (c << 10) + next - 0x35FDC00 : c
};

extension_RegExpValidationState.prototype.nextIndex = function nextIndex (i, forceU) {
    if ( forceU === void 0 ) forceU = false;

  var s = this.source;
  var l = s.length;
  if (i >= l) {
    return l
  }
  var c = s.charCodeAt(i), next;
  if (!(forceU || this.switchU) || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l ||
      (next = s.charCodeAt(i + 1)) < 0xDC00 || next > 0xDFFF) {
    return i + 1
  }
  return i + 2
};

extension_RegExpValidationState.prototype.current = function current (forceU) {
    if ( forceU === void 0 ) forceU = false;

  return this.at(this.pos, forceU)
};

extension_RegExpValidationState.prototype.lookahead = function lookahead (forceU) {
    if ( forceU === void 0 ) forceU = false;

  return this.at(this.nextIndex(this.pos, forceU), forceU)
};

extension_RegExpValidationState.prototype.advance = function advance (forceU) {
    if ( forceU === void 0 ) forceU = false;

  this.pos = this.nextIndex(this.pos, forceU);
};

extension_RegExpValidationState.prototype.eat = function eat (ch, forceU) {
    if ( forceU === void 0 ) forceU = false;

  if (this.current(forceU) === ch) {
    this.advance(forceU);
    return true
  }
  return false
};

extension_RegExpValidationState.prototype.eatChars = function eatChars (chs, forceU) {
    if ( forceU === void 0 ) forceU = false;

  var pos = this.pos;
  for (var i = 0, list = chs; i < list.length; i += 1) {
    var ch = list[i];

      var current = this.at(pos, forceU);
    if (current === -1 || current !== ch) {
      return false
    }
    pos = this.nextIndex(pos, forceU);
  }
  this.pos = pos;
  return true
};

/**
 * Validate the flags part of a given RegExpLiteral.
 *
 * @param {RegExpValidationState} state The state to validate RegExp.
 * @returns {void}
 */
extension_pp$1.validateRegExpFlags = function(state) {
  var validFlags = state.validFlags;
  var flags = state.flags;

  var u = false;
  var v = false;

  for (var i = 0; i < flags.length; i++) {
    var flag = flags.charAt(i);
    if (validFlags.indexOf(flag) === -1) {
      this.raise(state.start, "Invalid regular expression flag");
    }
    if (flags.indexOf(flag, i + 1) > -1) {
      this.raise(state.start, "Duplicate regular expression flag");
    }
    if (flag === "u") { u = true; }
    if (flag === "v") { v = true; }
  }
  if (this.options.ecmaVersion >= 15 && u && v) {
    this.raise(state.start, "Invalid regular expression flag");
  }
};

function extension_hasProp(obj) {
  for (var _ in obj) { return true }
  return false
}

/**
 * Validate the pattern part of a given RegExpLiteral.
 *
 * @param {RegExpValidationState} state The state to validate RegExp.
 * @returns {void}
 */
extension_pp$1.validateRegExpPattern = function(state) {
  this.regexp_pattern(state);

  // The goal symbol for the parse is |Pattern[~U, ~N]|. If the result of
  // parsing contains a |GroupName|, reparse with the goal symbol
  // |Pattern[~U, +N]| and use this result instead. Throw a *SyntaxError*
  // exception if _P_ did not conform to the grammar, if any elements of _P_
  // were not matched by the parse, or if any Early Error conditions exist.
  if (!state.switchN && this.options.ecmaVersion >= 9 && extension_hasProp(state.groupNames)) {
    state.switchN = true;
    this.regexp_pattern(state);
  }
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-Pattern
extension_pp$1.regexp_pattern = function(state) {
  state.pos = 0;
  state.lastIntValue = 0;
  state.lastStringValue = "";
  state.lastAssertionIsQuantifiable = false;
  state.numCapturingParens = 0;
  state.maxBackReference = 0;
  state.groupNames = Object.create(null);
  state.backReferenceNames.length = 0;
  state.branchID = null;

  this.regexp_disjunction(state);

  if (state.pos !== state.source.length) {
    // Make the same messages as V8.
    if (state.eat(0x29 /* ) */)) {
      state.raise("Unmatched ')'");
    }
    if (state.eat(0x5D /* ] */) || state.eat(0x7D /* } */)) {
      state.raise("Lone quantifier brackets");
    }
  }
  if (state.maxBackReference > state.numCapturingParens) {
    state.raise("Invalid escape");
  }
  for (var i = 0, list = state.backReferenceNames; i < list.length; i += 1) {
    var name = list[i];

    if (!state.groupNames[name]) {
      state.raise("Invalid named capture referenced");
    }
  }
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-Disjunction
extension_pp$1.regexp_disjunction = function(state) {
  var trackDisjunction = this.options.ecmaVersion >= 16;
  if (trackDisjunction) { state.branchID = new extension_BranchID(state.branchID, null); }
  this.regexp_alternative(state);
  while (state.eat(0x7C /* | */)) {
    if (trackDisjunction) { state.branchID = state.branchID.sibling(); }
    this.regexp_alternative(state);
  }
  if (trackDisjunction) { state.branchID = state.branchID.parent; }

  // Make the same message as V8.
  if (this.regexp_eatQuantifier(state, true)) {
    state.raise("Nothing to repeat");
  }
  if (state.eat(0x7B /* { */)) {
    state.raise("Lone quantifier brackets");
  }
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-Alternative
extension_pp$1.regexp_alternative = function(state) {
  while (state.pos < state.source.length && this.regexp_eatTerm(state)) {}
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Term
extension_pp$1.regexp_eatTerm = function(state) {
  if (this.regexp_eatAssertion(state)) {
    // Handle `QuantifiableAssertion Quantifier` alternative.
    // `state.lastAssertionIsQuantifiable` is true if the last eaten Assertion
    // is a QuantifiableAssertion.
    if (state.lastAssertionIsQuantifiable && this.regexp_eatQuantifier(state)) {
      // Make the same message as V8.
      if (state.switchU) {
        state.raise("Invalid quantifier");
      }
    }
    return true
  }

  if (state.switchU ? this.regexp_eatAtom(state) : this.regexp_eatExtendedAtom(state)) {
    this.regexp_eatQuantifier(state);
    return true
  }

  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Assertion
extension_pp$1.regexp_eatAssertion = function(state) {
  var start = state.pos;
  state.lastAssertionIsQuantifiable = false;

  // ^, $
  if (state.eat(0x5E /* ^ */) || state.eat(0x24 /* $ */)) {
    return true
  }

  // \b \B
  if (state.eat(0x5C /* \ */)) {
    if (state.eat(0x42 /* B */) || state.eat(0x62 /* b */)) {
      return true
    }
    state.pos = start;
  }

  // Lookahead / Lookbehind
  if (state.eat(0x28 /* ( */) && state.eat(0x3F /* ? */)) {
    var lookbehind = false;
    if (this.options.ecmaVersion >= 9) {
      lookbehind = state.eat(0x3C /* < */);
    }
    if (state.eat(0x3D /* = */) || state.eat(0x21 /* ! */)) {
      this.regexp_disjunction(state);
      if (!state.eat(0x29 /* ) */)) {
        state.raise("Unterminated group");
      }
      state.lastAssertionIsQuantifiable = !lookbehind;
      return true
    }
  }

  state.pos = start;
  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-Quantifier
extension_pp$1.regexp_eatQuantifier = function(state, noError) {
  if ( noError === void 0 ) noError = false;

  if (this.regexp_eatQuantifierPrefix(state, noError)) {
    state.eat(0x3F /* ? */);
    return true
  }
  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-QuantifierPrefix
extension_pp$1.regexp_eatQuantifierPrefix = function(state, noError) {
  return (
    state.eat(0x2A /* * */) ||
    state.eat(0x2B /* + */) ||
    state.eat(0x3F /* ? */) ||
    this.regexp_eatBracedQuantifier(state, noError)
  )
};
extension_pp$1.regexp_eatBracedQuantifier = function(state, noError) {
  var start = state.pos;
  if (state.eat(0x7B /* { */)) {
    var min = 0, max = -1;
    if (this.regexp_eatDecimalDigits(state)) {
      min = state.lastIntValue;
      if (state.eat(0x2C /* , */) && this.regexp_eatDecimalDigits(state)) {
        max = state.lastIntValue;
      }
      if (state.eat(0x7D /* } */)) {
        // SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-term
        if (max !== -1 && max < min && !noError) {
          state.raise("numbers out of order in {} quantifier");
        }
        return true
      }
    }
    if (state.switchU && !noError) {
      state.raise("Incomplete quantifier");
    }
    state.pos = start;
  }
  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-Atom
extension_pp$1.regexp_eatAtom = function(state) {
  return (
    this.regexp_eatPatternCharacters(state) ||
    state.eat(0x2E /* . */) ||
    this.regexp_eatReverseSolidusAtomEscape(state) ||
    this.regexp_eatCharacterClass(state) ||
    this.regexp_eatUncapturingGroup(state) ||
    this.regexp_eatCapturingGroup(state)
  )
};
extension_pp$1.regexp_eatReverseSolidusAtomEscape = function(state) {
  var start = state.pos;
  if (state.eat(0x5C /* \ */)) {
    if (this.regexp_eatAtomEscape(state)) {
      return true
    }
    state.pos = start;
  }
  return false
};
extension_pp$1.regexp_eatUncapturingGroup = function(state) {
  var start = state.pos;
  if (state.eat(0x28 /* ( */)) {
    if (state.eat(0x3F /* ? */)) {
      if (this.options.ecmaVersion >= 16) {
        var addModifiers = this.regexp_eatModifiers(state);
        var hasHyphen = state.eat(0x2D /* - */);
        if (addModifiers || hasHyphen) {
          for (var i = 0; i < addModifiers.length; i++) {
            var modifier = addModifiers.charAt(i);
            if (addModifiers.indexOf(modifier, i + 1) > -1) {
              state.raise("Duplicate regular expression modifiers");
            }
          }
          if (hasHyphen) {
            var removeModifiers = this.regexp_eatModifiers(state);
            if (!addModifiers && !removeModifiers && state.current() === 0x3A /* : */) {
              state.raise("Invalid regular expression modifiers");
            }
            for (var i$1 = 0; i$1 < removeModifiers.length; i$1++) {
              var modifier$1 = removeModifiers.charAt(i$1);
              if (
                removeModifiers.indexOf(modifier$1, i$1 + 1) > -1 ||
                addModifiers.indexOf(modifier$1) > -1
              ) {
                state.raise("Duplicate regular expression modifiers");
              }
            }
          }
        }
      }
      if (state.eat(0x3A /* : */)) {
        this.regexp_disjunction(state);
        if (state.eat(0x29 /* ) */)) {
          return true
        }
        state.raise("Unterminated group");
      }
    }
    state.pos = start;
  }
  return false
};
extension_pp$1.regexp_eatCapturingGroup = function(state) {
  if (state.eat(0x28 /* ( */)) {
    if (this.options.ecmaVersion >= 9) {
      this.regexp_groupSpecifier(state);
    } else if (state.current() === 0x3F /* ? */) {
      state.raise("Invalid group");
    }
    this.regexp_disjunction(state);
    if (state.eat(0x29 /* ) */)) {
      state.numCapturingParens += 1;
      return true
    }
    state.raise("Unterminated group");
  }
  return false
};
// RegularExpressionModifiers ::
//   [empty]
//   RegularExpressionModifiers RegularExpressionModifier
extension_pp$1.regexp_eatModifiers = function(state) {
  var modifiers = "";
  var ch = 0;
  while ((ch = state.current()) !== -1 && extension_isRegularExpressionModifier(ch)) {
    modifiers += extension_codePointToString(ch);
    state.advance();
  }
  return modifiers
};
// RegularExpressionModifier :: one of
//   `i` `m` `s`
function extension_isRegularExpressionModifier(ch) {
  return ch === 0x69 /* i */ || ch === 0x6d /* m */ || ch === 0x73 /* s */
}

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedAtom
extension_pp$1.regexp_eatExtendedAtom = function(state) {
  return (
    state.eat(0x2E /* . */) ||
    this.regexp_eatReverseSolidusAtomEscape(state) ||
    this.regexp_eatCharacterClass(state) ||
    this.regexp_eatUncapturingGroup(state) ||
    this.regexp_eatCapturingGroup(state) ||
    this.regexp_eatInvalidBracedQuantifier(state) ||
    this.regexp_eatExtendedPatternCharacter(state)
  )
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-InvalidBracedQuantifier
extension_pp$1.regexp_eatInvalidBracedQuantifier = function(state) {
  if (this.regexp_eatBracedQuantifier(state, true)) {
    state.raise("Nothing to repeat");
  }
  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-SyntaxCharacter
extension_pp$1.regexp_eatSyntaxCharacter = function(state) {
  var ch = state.current();
  if (extension_isSyntaxCharacter(ch)) {
    state.lastIntValue = ch;
    state.advance();
    return true
  }
  return false
};
function extension_isSyntaxCharacter(ch) {
  return (
    ch === 0x24 /* $ */ ||
    ch >= 0x28 /* ( */ && ch <= 0x2B /* + */ ||
    ch === 0x2E /* . */ ||
    ch === 0x3F /* ? */ ||
    ch >= 0x5B /* [ */ && ch <= 0x5E /* ^ */ ||
    ch >= 0x7B /* { */ && ch <= 0x7D /* } */
  )
}

// https://www.ecma-international.org/ecma-262/8.0/#prod-PatternCharacter
// But eat eager.
extension_pp$1.regexp_eatPatternCharacters = function(state) {
  var start = state.pos;
  var ch = 0;
  while ((ch = state.current()) !== -1 && !extension_isSyntaxCharacter(ch)) {
    state.advance();
  }
  return state.pos !== start
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedPatternCharacter
extension_pp$1.regexp_eatExtendedPatternCharacter = function(state) {
  var ch = state.current();
  if (
    ch !== -1 &&
    ch !== 0x24 /* $ */ &&
    !(ch >= 0x28 /* ( */ && ch <= 0x2B /* + */) &&
    ch !== 0x2E /* . */ &&
    ch !== 0x3F /* ? */ &&
    ch !== 0x5B /* [ */ &&
    ch !== 0x5E /* ^ */ &&
    ch !== 0x7C /* | */
  ) {
    state.advance();
    return true
  }
  return false
};

// GroupSpecifier ::
//   [empty]
//   `?` GroupName
extension_pp$1.regexp_groupSpecifier = function(state) {
  if (state.eat(0x3F /* ? */)) {
    if (!this.regexp_eatGroupName(state)) { state.raise("Invalid group"); }
    var trackDisjunction = this.options.ecmaVersion >= 16;
    var known = state.groupNames[state.lastStringValue];
    if (known) {
      if (trackDisjunction) {
        for (var i = 0, list = known; i < list.length; i += 1) {
          var altID = list[i];

          if (!altID.separatedFrom(state.branchID))
            { state.raise("Duplicate capture group name"); }
        }
      } else {
        state.raise("Duplicate capture group name");
      }
    }
    if (trackDisjunction) {
      (known || (state.groupNames[state.lastStringValue] = [])).push(state.branchID);
    } else {
      state.groupNames[state.lastStringValue] = true;
    }
  }
};

// GroupName ::
//   `<` RegExpIdentifierName `>`
// Note: this updates `state.lastStringValue` property with the eaten name.
extension_pp$1.regexp_eatGroupName = function(state) {
  state.lastStringValue = "";
  if (state.eat(0x3C /* < */)) {
    if (this.regexp_eatRegExpIdentifierName(state) && state.eat(0x3E /* > */)) {
      return true
    }
    state.raise("Invalid capture group name");
  }
  return false
};

// RegExpIdentifierName ::
//   RegExpIdentifierStart
//   RegExpIdentifierName RegExpIdentifierPart
// Note: this updates `state.lastStringValue` property with the eaten name.
extension_pp$1.regexp_eatRegExpIdentifierName = function(state) {
  state.lastStringValue = "";
  if (this.regexp_eatRegExpIdentifierStart(state)) {
    state.lastStringValue += extension_codePointToString(state.lastIntValue);
    while (this.regexp_eatRegExpIdentifierPart(state)) {
      state.lastStringValue += extension_codePointToString(state.lastIntValue);
    }
    return true
  }
  return false
};

// RegExpIdentifierStart ::
//   UnicodeIDStart
//   `$`
//   `_`
//   `\` RegExpUnicodeEscapeSequence[+U]
extension_pp$1.regexp_eatRegExpIdentifierStart = function(state) {
  var start = state.pos;
  var forceU = this.options.ecmaVersion >= 11;
  var ch = state.current(forceU);
  state.advance(forceU);

  if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state, forceU)) {
    ch = state.lastIntValue;
  }
  if (extension_isRegExpIdentifierStart(ch)) {
    state.lastIntValue = ch;
    return true
  }

  state.pos = start;
  return false
};
function extension_isRegExpIdentifierStart(ch) {
  return extension_isIdentifierStart(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */
}

// RegExpIdentifierPart ::
//   UnicodeIDContinue
//   `$`
//   `_`
//   `\` RegExpUnicodeEscapeSequence[+U]
//   <ZWNJ>
//   <ZWJ>
extension_pp$1.regexp_eatRegExpIdentifierPart = function(state) {
  var start = state.pos;
  var forceU = this.options.ecmaVersion >= 11;
  var ch = state.current(forceU);
  state.advance(forceU);

  if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state, forceU)) {
    ch = state.lastIntValue;
  }
  if (extension_isRegExpIdentifierPart(ch)) {
    state.lastIntValue = ch;
    return true
  }

  state.pos = start;
  return false
};
function extension_isRegExpIdentifierPart(ch) {
  return extension_isIdentifierChar(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */ || ch === 0x200C /* <ZWNJ> */ || ch === 0x200D /* <ZWJ> */
}

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-AtomEscape
extension_pp$1.regexp_eatAtomEscape = function(state) {
  if (
    this.regexp_eatBackReference(state) ||
    this.regexp_eatCharacterClassEscape(state) ||
    this.regexp_eatCharacterEscape(state) ||
    (state.switchN && this.regexp_eatKGroupName(state))
  ) {
    return true
  }
  if (state.switchU) {
    // Make the same message as V8.
    if (state.current() === 0x63 /* c */) {
      state.raise("Invalid unicode escape");
    }
    state.raise("Invalid escape");
  }
  return false
};
extension_pp$1.regexp_eatBackReference = function(state) {
  var start = state.pos;
  if (this.regexp_eatDecimalEscape(state)) {
    var n = state.lastIntValue;
    if (state.switchU) {
      // For SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-atomescape
      if (n > state.maxBackReference) {
        state.maxBackReference = n;
      }
      return true
    }
    if (n <= state.numCapturingParens) {
      return true
    }
    state.pos = start;
  }
  return false
};
extension_pp$1.regexp_eatKGroupName = function(state) {
  if (state.eat(0x6B /* k */)) {
    if (this.regexp_eatGroupName(state)) {
      state.backReferenceNames.push(state.lastStringValue);
      return true
    }
    state.raise("Invalid named reference");
  }
  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-CharacterEscape
extension_pp$1.regexp_eatCharacterEscape = function(state) {
  return (
    this.regexp_eatControlEscape(state) ||
    this.regexp_eatCControlLetter(state) ||
    this.regexp_eatZero(state) ||
    this.regexp_eatHexEscapeSequence(state) ||
    this.regexp_eatRegExpUnicodeEscapeSequence(state, false) ||
    (!state.switchU && this.regexp_eatLegacyOctalEscapeSequence(state)) ||
    this.regexp_eatIdentityEscape(state)
  )
};
extension_pp$1.regexp_eatCControlLetter = function(state) {
  var start = state.pos;
  if (state.eat(0x63 /* c */)) {
    if (this.regexp_eatControlLetter(state)) {
      return true
    }
    state.pos = start;
  }
  return false
};
extension_pp$1.regexp_eatZero = function(state) {
  if (state.current() === 0x30 /* 0 */ && !extension_isDecimalDigit(state.lookahead())) {
    state.lastIntValue = 0;
    state.advance();
    return true
  }
  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlEscape
extension_pp$1.regexp_eatControlEscape = function(state) {
  var ch = state.current();
  if (ch === 0x74 /* t */) {
    state.lastIntValue = 0x09; /* \t */
    state.advance();
    return true
  }
  if (ch === 0x6E /* n */) {
    state.lastIntValue = 0x0A; /* \n */
    state.advance();
    return true
  }
  if (ch === 0x76 /* v */) {
    state.lastIntValue = 0x0B; /* \v */
    state.advance();
    return true
  }
  if (ch === 0x66 /* f */) {
    state.lastIntValue = 0x0C; /* \f */
    state.advance();
    return true
  }
  if (ch === 0x72 /* r */) {
    state.lastIntValue = 0x0D; /* \r */
    state.advance();
    return true
  }
  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlLetter
extension_pp$1.regexp_eatControlLetter = function(state) {
  var ch = state.current();
  if (extension_isControlLetter(ch)) {
    state.lastIntValue = ch % 0x20;
    state.advance();
    return true
  }
  return false
};
function extension_isControlLetter(ch) {
  return (
    (ch >= 0x41 /* A */ && ch <= 0x5A /* Z */) ||
    (ch >= 0x61 /* a */ && ch <= 0x7A /* z */)
  )
}

// https://www.ecma-international.org/ecma-262/8.0/#prod-RegExpUnicodeEscapeSequence
extension_pp$1.regexp_eatRegExpUnicodeEscapeSequence = function(state, forceU) {
  if ( forceU === void 0 ) forceU = false;

  var start = state.pos;
  var switchU = forceU || state.switchU;

  if (state.eat(0x75 /* u */)) {
    if (this.regexp_eatFixedHexDigits(state, 4)) {
      var lead = state.lastIntValue;
      if (switchU && lead >= 0xD800 && lead <= 0xDBFF) {
        var leadSurrogateEnd = state.pos;
        if (state.eat(0x5C /* \ */) && state.eat(0x75 /* u */) && this.regexp_eatFixedHexDigits(state, 4)) {
          var trail = state.lastIntValue;
          if (trail >= 0xDC00 && trail <= 0xDFFF) {
            state.lastIntValue = (lead - 0xD800) * 0x400 + (trail - 0xDC00) + 0x10000;
            return true
          }
        }
        state.pos = leadSurrogateEnd;
        state.lastIntValue = lead;
      }
      return true
    }
    if (
      switchU &&
      state.eat(0x7B /* { */) &&
      this.regexp_eatHexDigits(state) &&
      state.eat(0x7D /* } */) &&
      extension_isValidUnicode(state.lastIntValue)
    ) {
      return true
    }
    if (switchU) {
      state.raise("Invalid unicode escape");
    }
    state.pos = start;
  }

  return false
};
function extension_isValidUnicode(ch) {
  return ch >= 0 && ch <= 0x10FFFF
}

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-IdentityEscape
extension_pp$1.regexp_eatIdentityEscape = function(state) {
  if (state.switchU) {
    if (this.regexp_eatSyntaxCharacter(state)) {
      return true
    }
    if (state.eat(0x2F /* / */)) {
      state.lastIntValue = 0x2F; /* / */
      return true
    }
    return false
  }

  var ch = state.current();
  if (ch !== 0x63 /* c */ && (!state.switchN || ch !== 0x6B /* k */)) {
    state.lastIntValue = ch;
    state.advance();
    return true
  }

  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalEscape
extension_pp$1.regexp_eatDecimalEscape = function(state) {
  state.lastIntValue = 0;
  var ch = state.current();
  if (ch >= 0x31 /* 1 */ && ch <= 0x39 /* 9 */) {
    do {
      state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */);
      state.advance();
    } while ((ch = state.current()) >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */)
    return true
  }
  return false
};

// Return values used by character set parsing methods, needed to
// forbid negation of sets that can match strings.
var extension_CharSetNone = 0; // Nothing parsed
var extension_CharSetOk = 1; // Construct parsed, cannot contain strings
var extension_CharSetString = 2; // Construct parsed, can contain strings

// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClassEscape
extension_pp$1.regexp_eatCharacterClassEscape = function(state) {
  var ch = state.current();

  if (extension_isCharacterClassEscape(ch)) {
    state.lastIntValue = -1;
    state.advance();
    return extension_CharSetOk
  }

  var negate = false;
  if (
    state.switchU &&
    this.options.ecmaVersion >= 9 &&
    ((negate = ch === 0x50 /* P */) || ch === 0x70 /* p */)
  ) {
    state.lastIntValue = -1;
    state.advance();
    var result;
    if (
      state.eat(0x7B /* { */) &&
      (result = this.regexp_eatUnicodePropertyValueExpression(state)) &&
      state.eat(0x7D /* } */)
    ) {
      if (negate && result === extension_CharSetString) { state.raise("Invalid property name"); }
      return result
    }
    state.raise("Invalid property name");
  }

  return extension_CharSetNone
};

function extension_isCharacterClassEscape(ch) {
  return (
    ch === 0x64 /* d */ ||
    ch === 0x44 /* D */ ||
    ch === 0x73 /* s */ ||
    ch === 0x53 /* S */ ||
    ch === 0x77 /* w */ ||
    ch === 0x57 /* W */
  )
}

// UnicodePropertyValueExpression ::
//   UnicodePropertyName `=` UnicodePropertyValue
//   LoneUnicodePropertyNameOrValue
extension_pp$1.regexp_eatUnicodePropertyValueExpression = function(state) {
  var start = state.pos;

  // UnicodePropertyName `=` UnicodePropertyValue
  if (this.regexp_eatUnicodePropertyName(state) && state.eat(0x3D /* = */)) {
    var name = state.lastStringValue;
    if (this.regexp_eatUnicodePropertyValue(state)) {
      var value = state.lastStringValue;
      this.regexp_validateUnicodePropertyNameAndValue(state, name, value);
      return extension_CharSetOk
    }
  }
  state.pos = start;

  // LoneUnicodePropertyNameOrValue
  if (this.regexp_eatLoneUnicodePropertyNameOrValue(state)) {
    var nameOrValue = state.lastStringValue;
    return this.regexp_validateUnicodePropertyNameOrValue(state, nameOrValue)
  }
  return extension_CharSetNone
};

extension_pp$1.regexp_validateUnicodePropertyNameAndValue = function(state, name, value) {
  if (!extension_hasOwn(state.unicodeProperties.nonBinary, name))
    { state.raise("Invalid property name"); }
  if (!state.unicodeProperties.nonBinary[name].test(value))
    { state.raise("Invalid property value"); }
};

extension_pp$1.regexp_validateUnicodePropertyNameOrValue = function(state, nameOrValue) {
  if (state.unicodeProperties.binary.test(nameOrValue)) { return extension_CharSetOk }
  if (state.switchV && state.unicodeProperties.binaryOfStrings.test(nameOrValue)) { return extension_CharSetString }
  state.raise("Invalid property name");
};

// UnicodePropertyName ::
//   UnicodePropertyNameCharacters
extension_pp$1.regexp_eatUnicodePropertyName = function(state) {
  var ch = 0;
  state.lastStringValue = "";
  while (extension_isUnicodePropertyNameCharacter(ch = state.current())) {
    state.lastStringValue += extension_codePointToString(ch);
    state.advance();
  }
  return state.lastStringValue !== ""
};

function extension_isUnicodePropertyNameCharacter(ch) {
  return extension_isControlLetter(ch) || ch === 0x5F /* _ */
}

// UnicodePropertyValue ::
//   UnicodePropertyValueCharacters
extension_pp$1.regexp_eatUnicodePropertyValue = function(state) {
  var ch = 0;
  state.lastStringValue = "";
  while (extension_isUnicodePropertyValueCharacter(ch = state.current())) {
    state.lastStringValue += extension_codePointToString(ch);
    state.advance();
  }
  return state.lastStringValue !== ""
};
function extension_isUnicodePropertyValueCharacter(ch) {
  return extension_isUnicodePropertyNameCharacter(ch) || extension_isDecimalDigit(ch)
}

// LoneUnicodePropertyNameOrValue ::
//   UnicodePropertyValueCharacters
extension_pp$1.regexp_eatLoneUnicodePropertyNameOrValue = function(state) {
  return this.regexp_eatUnicodePropertyValue(state)
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClass
extension_pp$1.regexp_eatCharacterClass = function(state) {
  if (state.eat(0x5B /* [ */)) {
    var negate = state.eat(0x5E /* ^ */);
    var result = this.regexp_classContents(state);
    if (!state.eat(0x5D /* ] */))
      { state.raise("Unterminated character class"); }
    if (negate && result === extension_CharSetString)
      { state.raise("Negated character class may contain strings"); }
    return true
  }
  return false
};

// https://tc39.es/ecma262/#prod-ClassContents
// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassRanges
extension_pp$1.regexp_classContents = function(state) {
  if (state.current() === 0x5D /* ] */) { return extension_CharSetOk }
  if (state.switchV) { return this.regexp_classSetExpression(state) }
  this.regexp_nonEmptyClassRanges(state);
  return extension_CharSetOk
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRanges
// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRangesNoDash
extension_pp$1.regexp_nonEmptyClassRanges = function(state) {
  while (this.regexp_eatClassAtom(state)) {
    var left = state.lastIntValue;
    if (state.eat(0x2D /* - */) && this.regexp_eatClassAtom(state)) {
      var right = state.lastIntValue;
      if (state.switchU && (left === -1 || right === -1)) {
        state.raise("Invalid character class");
      }
      if (left !== -1 && right !== -1 && left > right) {
        state.raise("Range out of order in character class");
      }
    }
  }
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtom
// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtomNoDash
extension_pp$1.regexp_eatClassAtom = function(state) {
  var start = state.pos;

  if (state.eat(0x5C /* \ */)) {
    if (this.regexp_eatClassEscape(state)) {
      return true
    }
    if (state.switchU) {
      // Make the same message as V8.
      var ch$1 = state.current();
      if (ch$1 === 0x63 /* c */ || extension_isOctalDigit(ch$1)) {
        state.raise("Invalid class escape");
      }
      state.raise("Invalid escape");
    }
    state.pos = start;
  }

  var ch = state.current();
  if (ch !== 0x5D /* ] */) {
    state.lastIntValue = ch;
    state.advance();
    return true
  }

  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassEscape
extension_pp$1.regexp_eatClassEscape = function(state) {
  var start = state.pos;

  if (state.eat(0x62 /* b */)) {
    state.lastIntValue = 0x08; /* <BS> */
    return true
  }

  if (state.switchU && state.eat(0x2D /* - */)) {
    state.lastIntValue = 0x2D; /* - */
    return true
  }

  if (!state.switchU && state.eat(0x63 /* c */)) {
    if (this.regexp_eatClassControlLetter(state)) {
      return true
    }
    state.pos = start;
  }

  return (
    this.regexp_eatCharacterClassEscape(state) ||
    this.regexp_eatCharacterEscape(state)
  )
};

// https://tc39.es/ecma262/#prod-ClassSetExpression
// https://tc39.es/ecma262/#prod-ClassUnion
// https://tc39.es/ecma262/#prod-ClassIntersection
// https://tc39.es/ecma262/#prod-ClassSubtraction
extension_pp$1.regexp_classSetExpression = function(state) {
  var result = extension_CharSetOk, subResult;
  if (this.regexp_eatClassSetRange(state)) ; else if (subResult = this.regexp_eatClassSetOperand(state)) {
    if (subResult === extension_CharSetString) { result = extension_CharSetString; }
    // https://tc39.es/ecma262/#prod-ClassIntersection
    var start = state.pos;
    while (state.eatChars([0x26, 0x26] /* && */)) {
      if (
        state.current() !== 0x26 /* & */ &&
        (subResult = this.regexp_eatClassSetOperand(state))
      ) {
        if (subResult !== extension_CharSetString) { result = extension_CharSetOk; }
        continue
      }
      state.raise("Invalid character in character class");
    }
    if (start !== state.pos) { return result }
    // https://tc39.es/ecma262/#prod-ClassSubtraction
    while (state.eatChars([0x2D, 0x2D] /* -- */)) {
      if (this.regexp_eatClassSetOperand(state)) { continue }
      state.raise("Invalid character in character class");
    }
    if (start !== state.pos) { return result }
  } else {
    state.raise("Invalid character in character class");
  }
  // https://tc39.es/ecma262/#prod-ClassUnion
  for (;;) {
    if (this.regexp_eatClassSetRange(state)) { continue }
    subResult = this.regexp_eatClassSetOperand(state);
    if (!subResult) { return result }
    if (subResult === extension_CharSetString) { result = extension_CharSetString; }
  }
};

// https://tc39.es/ecma262/#prod-ClassSetRange
extension_pp$1.regexp_eatClassSetRange = function(state) {
  var start = state.pos;
  if (this.regexp_eatClassSetCharacter(state)) {
    var left = state.lastIntValue;
    if (state.eat(0x2D /* - */) && this.regexp_eatClassSetCharacter(state)) {
      var right = state.lastIntValue;
      if (left !== -1 && right !== -1 && left > right) {
        state.raise("Range out of order in character class");
      }
      return true
    }
    state.pos = start;
  }
  return false
};

// https://tc39.es/ecma262/#prod-ClassSetOperand
extension_pp$1.regexp_eatClassSetOperand = function(state) {
  if (this.regexp_eatClassSetCharacter(state)) { return extension_CharSetOk }
  return this.regexp_eatClassStringDisjunction(state) || this.regexp_eatNestedClass(state)
};

// https://tc39.es/ecma262/#prod-NestedClass
extension_pp$1.regexp_eatNestedClass = function(state) {
  var start = state.pos;
  if (state.eat(0x5B /* [ */)) {
    var negate = state.eat(0x5E /* ^ */);
    var result = this.regexp_classContents(state);
    if (state.eat(0x5D /* ] */)) {
      if (negate && result === extension_CharSetString) {
        state.raise("Negated character class may contain strings");
      }
      return result
    }
    state.pos = start;
  }
  if (state.eat(0x5C /* \ */)) {
    var result$1 = this.regexp_eatCharacterClassEscape(state);
    if (result$1) {
      return result$1
    }
    state.pos = start;
  }
  return null
};

// https://tc39.es/ecma262/#prod-ClassStringDisjunction
extension_pp$1.regexp_eatClassStringDisjunction = function(state) {
  var start = state.pos;
  if (state.eatChars([0x5C, 0x71] /* \q */)) {
    if (state.eat(0x7B /* { */)) {
      var result = this.regexp_classStringDisjunctionContents(state);
      if (state.eat(0x7D /* } */)) {
        return result
      }
    } else {
      // Make the same message as V8.
      state.raise("Invalid escape");
    }
    state.pos = start;
  }
  return null
};

// https://tc39.es/ecma262/#prod-ClassStringDisjunctionContents
extension_pp$1.regexp_classStringDisjunctionContents = function(state) {
  var result = this.regexp_classString(state);
  while (state.eat(0x7C /* | */)) {
    if (this.regexp_classString(state) === extension_CharSetString) { result = extension_CharSetString; }
  }
  return result
};

// https://tc39.es/ecma262/#prod-ClassString
// https://tc39.es/ecma262/#prod-NonEmptyClassString
extension_pp$1.regexp_classString = function(state) {
  var count = 0;
  while (this.regexp_eatClassSetCharacter(state)) { count++; }
  return count === 1 ? extension_CharSetOk : extension_CharSetString
};

// https://tc39.es/ecma262/#prod-ClassSetCharacter
extension_pp$1.regexp_eatClassSetCharacter = function(state) {
  var start = state.pos;
  if (state.eat(0x5C /* \ */)) {
    if (
      this.regexp_eatCharacterEscape(state) ||
      this.regexp_eatClassSetReservedPunctuator(state)
    ) {
      return true
    }
    if (state.eat(0x62 /* b */)) {
      state.lastIntValue = 0x08; /* <BS> */
      return true
    }
    state.pos = start;
    return false
  }
  var ch = state.current();
  if (ch < 0 || ch === state.lookahead() && extension_isClassSetReservedDoublePunctuatorCharacter(ch)) { return false }
  if (extension_isClassSetSyntaxCharacter(ch)) { return false }
  state.advance();
  state.lastIntValue = ch;
  return true
};

// https://tc39.es/ecma262/#prod-ClassSetReservedDoublePunctuator
function extension_isClassSetReservedDoublePunctuatorCharacter(ch) {
  return (
    ch === 0x21 /* ! */ ||
    ch >= 0x23 /* # */ && ch <= 0x26 /* & */ ||
    ch >= 0x2A /* * */ && ch <= 0x2C /* , */ ||
    ch === 0x2E /* . */ ||
    ch >= 0x3A /* : */ && ch <= 0x40 /* @ */ ||
    ch === 0x5E /* ^ */ ||
    ch === 0x60 /* ` */ ||
    ch === 0x7E /* ~ */
  )
}

// https://tc39.es/ecma262/#prod-ClassSetSyntaxCharacter
function extension_isClassSetSyntaxCharacter(ch) {
  return (
    ch === 0x28 /* ( */ ||
    ch === 0x29 /* ) */ ||
    ch === 0x2D /* - */ ||
    ch === 0x2F /* / */ ||
    ch >= 0x5B /* [ */ && ch <= 0x5D /* ] */ ||
    ch >= 0x7B /* { */ && ch <= 0x7D /* } */
  )
}

// https://tc39.es/ecma262/#prod-ClassSetReservedPunctuator
extension_pp$1.regexp_eatClassSetReservedPunctuator = function(state) {
  var ch = state.current();
  if (extension_isClassSetReservedPunctuator(ch)) {
    state.lastIntValue = ch;
    state.advance();
    return true
  }
  return false
};

// https://tc39.es/ecma262/#prod-ClassSetReservedPunctuator
function extension_isClassSetReservedPunctuator(ch) {
  return (
    ch === 0x21 /* ! */ ||
    ch === 0x23 /* # */ ||
    ch === 0x25 /* % */ ||
    ch === 0x26 /* & */ ||
    ch === 0x2C /* , */ ||
    ch === 0x2D /* - */ ||
    ch >= 0x3A /* : */ && ch <= 0x3E /* > */ ||
    ch === 0x40 /* @ */ ||
    ch === 0x60 /* ` */ ||
    ch === 0x7E /* ~ */
  )
}

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassControlLetter
extension_pp$1.regexp_eatClassControlLetter = function(state) {
  var ch = state.current();
  if (extension_isDecimalDigit(ch) || ch === 0x5F /* _ */) {
    state.lastIntValue = ch % 0x20;
    state.advance();
    return true
  }
  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence
extension_pp$1.regexp_eatHexEscapeSequence = function(state) {
  var start = state.pos;
  if (state.eat(0x78 /* x */)) {
    if (this.regexp_eatFixedHexDigits(state, 2)) {
      return true
    }
    if (state.switchU) {
      state.raise("Invalid escape");
    }
    state.pos = start;
  }
  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalDigits
extension_pp$1.regexp_eatDecimalDigits = function(state) {
  var start = state.pos;
  var ch = 0;
  state.lastIntValue = 0;
  while (extension_isDecimalDigit(ch = state.current())) {
    state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */);
    state.advance();
  }
  return state.pos !== start
};
function extension_isDecimalDigit(ch) {
  return ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */
}

// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigits
extension_pp$1.regexp_eatHexDigits = function(state) {
  var start = state.pos;
  var ch = 0;
  state.lastIntValue = 0;
  while (extension_isHexDigit(ch = state.current())) {
    state.lastIntValue = 16 * state.lastIntValue + extension_hexToInt(ch);
    state.advance();
  }
  return state.pos !== start
};
function extension_isHexDigit(ch) {
  return (
    (ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */) ||
    (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) ||
    (ch >= 0x61 /* a */ && ch <= 0x66 /* f */)
  )
}
function extension_hexToInt(ch) {
  if (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) {
    return 10 + (ch - 0x41 /* A */)
  }
  if (ch >= 0x61 /* a */ && ch <= 0x66 /* f */) {
    return 10 + (ch - 0x61 /* a */)
  }
  return ch - 0x30 /* 0 */
}

// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-LegacyOctalEscapeSequence
// Allows only 0-377(octal) i.e. 0-255(decimal).
extension_pp$1.regexp_eatLegacyOctalEscapeSequence = function(state) {
  if (this.regexp_eatOctalDigit(state)) {
    var n1 = state.lastIntValue;
    if (this.regexp_eatOctalDigit(state)) {
      var n2 = state.lastIntValue;
      if (n1 <= 3 && this.regexp_eatOctalDigit(state)) {
        state.lastIntValue = n1 * 64 + n2 * 8 + state.lastIntValue;
      } else {
        state.lastIntValue = n1 * 8 + n2;
      }
    } else {
      state.lastIntValue = n1;
    }
    return true
  }
  return false
};

// https://www.ecma-international.org/ecma-262/8.0/#prod-OctalDigit
extension_pp$1.regexp_eatOctalDigit = function(state) {
  var ch = state.current();
  if (extension_isOctalDigit(ch)) {
    state.lastIntValue = ch - 0x30; /* 0 */
    state.advance();
    return true
  }
  state.lastIntValue = 0;
  return false
};
function extension_isOctalDigit(ch) {
  return ch >= 0x30 /* 0 */ && ch <= 0x37 /* 7 */
}

// https://www.ecma-international.org/ecma-262/8.0/#prod-Hex4Digits
// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigit
// And HexDigit HexDigit in https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence
extension_pp$1.regexp_eatFixedHexDigits = function(state, length) {
  var start = state.pos;
  state.lastIntValue = 0;
  for (var i = 0; i < length; ++i) {
    var ch = state.current();
    if (!extension_isHexDigit(ch)) {
      state.pos = start;
      return false
    }
    state.lastIntValue = 16 * state.lastIntValue + extension_hexToInt(ch);
    state.advance();
  }
  return true
};

// Object type used to represent tokens. Note that normally, tokens
// simply exist as properties on the parser object. This is only
// used for the onToken callback and the external tokenizer.

var extension_Token = function Token(p) {
  this.type = p.type;
  this.value = p.value;
  this.start = p.start;
  this.end = p.end;
  if (p.options.locations)
    { this.loc = new extension_SourceLocation(p, p.startLoc, p.endLoc); }
  if (p.options.ranges)
    { this.range = [p.start, p.end]; }
};

// ## Tokenizer

var extension_pp = extension_Parser.prototype;

// Move to the next token

extension_pp.next = function(ignoreEscapeSequenceInKeyword) {
  if (!ignoreEscapeSequenceInKeyword && this.type.keyword && this.containsEsc)
    { this.raiseRecoverable(this.start, "Escape sequence in keyword " + this.type.keyword); }
  if (this.options.onToken)
    { this.options.onToken(new extension_Token(this)); }

  this.lastTokEnd = this.end;
  this.lastTokStart = this.start;
  this.lastTokEndLoc = this.endLoc;
  this.lastTokStartLoc = this.startLoc;
  this.nextToken();
};

extension_pp.getToken = function() {
  this.next();
  return new extension_Token(this)
};

// If we're in an ES6 environment, make parsers iterable
if (typeof Symbol !== "undefined")
  { extension_pp[Symbol.iterator] = function() {
    var this$1$1 = this;

    return {
      next: function () {
        var token = this$1$1.getToken();
        return {
          done: token.type === extension_types$1.eof,
          value: token
        }
      }
    }
  }; }

// Toggle strict mode. Re-reads the next number or string to please
// pedantic tests (`"use strict"; 010;` should fail).

// Read a single token, updating the parser object's token-related
// properties.

extension_pp.nextToken = function() {
  var curContext = this.curContext();
  if (!curContext || !curContext.preserveSpace) { this.skipSpace(); }

  this.start = this.pos;
  if (this.options.locations) { this.startLoc = this.curPosition(); }
  if (this.pos >= this.input.length) { return this.finishToken(extension_types$1.eof) }

  if (curContext.override) { return curContext.override(this) }
  else { this.readToken(this.fullCharCodeAtPos()); }
};

extension_pp.readToken = function(code) {
  // Identifier or keyword. '\uXXXX' sequences are allowed in
  // identifiers, so '\' also dispatches to that.
  if (extension_isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
    { return this.readWord() }

  return this.getTokenFromCode(code)
};

extension_pp.fullCharCodeAtPos = function() {
  var code = this.input.charCodeAt(this.pos);
  if (code <= 0xd7ff || code >= 0xdc00) { return code }
  var next = this.input.charCodeAt(this.pos + 1);
  return next <= 0xdbff || next >= 0xe000 ? code : (code << 10) + next - 0x35fdc00
};

extension_pp.skipBlockComment = function() {
  var startLoc = this.options.onComment && this.curPosition();
  var start = this.pos, end = this.input.indexOf("*/", this.pos += 2);
  if (end === -1) { this.raise(this.pos - 2, "Unterminated comment"); }
  this.pos = end + 2;
  if (this.options.locations) {
    for (var nextBreak = (void 0), pos = start; (nextBreak = extension_nextLineBreak(this.input, pos, this.pos)) > -1;) {
      ++this.curLine;
      pos = this.lineStart = nextBreak;
    }
  }
  if (this.options.onComment)
    { this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
                           startLoc, this.curPosition()); }
};

extension_pp.skipLineComment = function(startSkip) {
  var start = this.pos;
  var startLoc = this.options.onComment && this.curPosition();
  var ch = this.input.charCodeAt(this.pos += startSkip);
  while (this.pos < this.input.length && !extension_isNewLine(ch)) {
    ch = this.input.charCodeAt(++this.pos);
  }
  if (this.options.onComment)
    { this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
                           startLoc, this.curPosition()); }
};

// Called at the start of the parse and after every token. Skips
// whitespace and comments, and.

extension_pp.skipSpace = function() {
  loop: while (this.pos < this.input.length) {
    var ch = this.input.charCodeAt(this.pos);
    switch (ch) {
    case 32: case 160: // ' '
      ++this.pos;
      break
    case 13:
      if (this.input.charCodeAt(this.pos + 1) === 10) {
        ++this.pos;
      }
    case 10: case 8232: case 8233:
      ++this.pos;
      if (this.options.locations) {
        ++this.curLine;
        this.lineStart = this.pos;
      }
      break
    case 47: // '/'
      switch (this.input.charCodeAt(this.pos + 1)) {
      case 42: // '*'
        this.skipBlockComment();
        break
      case 47:
        this.skipLineComment(2);
        break
      default:
        break loop
      }
      break
    default:
      if (ch > 8 && ch < 14 || ch >= 5760 && extension_nonASCIIwhitespace.test(String.fromCharCode(ch))) {
        ++this.pos;
      } else {
        break loop
      }
    }
  }
};

// Called at the end of every token. Sets `end`, `val`, and
// maintains `context` and `exprAllowed`, and skips the space after
// the token, so that the next one's `start` will point at the
// right position.

extension_pp.finishToken = function(type, val) {
  this.end = this.pos;
  if (this.options.locations) { this.endLoc = this.curPosition(); }
  var prevType = this.type;
  this.type = type;
  this.value = val;

  this.updateContext(prevType);
};

// ### Token reading

// This is the function that is called to fetch the next token. It
// is somewhat obscure, because it works in character codes rather
// than characters, and because operator parsing has been inlined
// into it.
//
// All in the name of speed.
//
extension_pp.readToken_dot = function() {
  var next = this.input.charCodeAt(this.pos + 1);
  if (next >= 48 && next <= 57) { return this.readNumber(true) }
  var next2 = this.input.charCodeAt(this.pos + 2);
  if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
    this.pos += 3;
    return this.finishToken(extension_types$1.ellipsis)
  } else {
    ++this.pos;
    return this.finishToken(extension_types$1.dot)
  }
};

extension_pp.readToken_slash = function() { // '/'
  var next = this.input.charCodeAt(this.pos + 1);
  if (this.exprAllowed) { ++this.pos; return this.readRegexp() }
  if (next === 61) { return this.finishOp(extension_types$1.assign, 2) }
  return this.finishOp(extension_types$1.slash, 1)
};

extension_pp.readToken_mult_modulo_exp = function(code) { // '%*'
  var next = this.input.charCodeAt(this.pos + 1);
  var size = 1;
  var tokentype = code === 42 ? extension_types$1.star : extension_types$1.modulo;

  // exponentiation operator ** and **=
  if (this.options.ecmaVersion >= 7 && code === 42 && next === 42) {
    ++size;
    tokentype = extension_types$1.starstar;
    next = this.input.charCodeAt(this.pos + 2);
  }

  if (next === 61) { return this.finishOp(extension_types$1.assign, size + 1) }
  return this.finishOp(tokentype, size)
};

extension_pp.readToken_pipe_amp = function(code) { // '|&'
  var next = this.input.charCodeAt(this.pos + 1);
  if (next === code) {
    if (this.options.ecmaVersion >= 12) {
      var next2 = this.input.charCodeAt(this.pos + 2);
      if (next2 === 61) { return this.finishOp(extension_types$1.assign, 3) }
    }
    return this.finishOp(code === 124 ? extension_types$1.logicalOR : extension_types$1.logicalAND, 2)
  }
  if (next === 61) { return this.finishOp(extension_types$1.assign, 2) }
  return this.finishOp(code === 124 ? extension_types$1.bitwiseOR : extension_types$1.bitwiseAND, 1)
};

extension_pp.readToken_caret = function() { // '^'
  var next = this.input.charCodeAt(this.pos + 1);
  if (next === 61) { return this.finishOp(extension_types$1.assign, 2) }
  return this.finishOp(extension_types$1.bitwiseXOR, 1)
};

extension_pp.readToken_plus_min = function(code) { // '+-'
  var next = this.input.charCodeAt(this.pos + 1);
  if (next === code) {
    if (next === 45 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 62 &&
        (this.lastTokEnd === 0 || extension_lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) {
      // A `-->` line comment
      this.skipLineComment(3);
      this.skipSpace();
      return this.nextToken()
    }
    return this.finishOp(extension_types$1.incDec, 2)
  }
  if (next === 61) { return this.finishOp(extension_types$1.assign, 2) }
  return this.finishOp(extension_types$1.plusMin, 1)
};

extension_pp.readToken_lt_gt = function(code) { // '<>'
  var next = this.input.charCodeAt(this.pos + 1);
  var size = 1;
  if (next === code) {
    size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2;
    if (this.input.charCodeAt(this.pos + size) === 61) { return this.finishOp(extension_types$1.assign, size + 1) }
    return this.finishOp(extension_types$1.bitShift, size)
  }
  if (next === 33 && code === 60 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 45 &&
      this.input.charCodeAt(this.pos + 3) === 45) {
    // `<!--`, an XML-style comment that should be interpreted as a line comment
    this.skipLineComment(4);
    this.skipSpace();
    return this.nextToken()
  }
  if (next === 61) { size = 2; }
  return this.finishOp(extension_types$1.relational, size)
};

extension_pp.readToken_eq_excl = function(code) { // '=!'
  var next = this.input.charCodeAt(this.pos + 1);
  if (next === 61) { return this.finishOp(extension_types$1.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2) }
  if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>'
    this.pos += 2;
    return this.finishToken(extension_types$1.arrow)
  }
  return this.finishOp(code === 61 ? extension_types$1.eq : extension_types$1.prefix, 1)
};

extension_pp.readToken_question = function() { // '?'
  var ecmaVersion = this.options.ecmaVersion;
  if (ecmaVersion >= 11) {
    var next = this.input.charCodeAt(this.pos + 1);
    if (next === 46) {
      var next2 = this.input.charCodeAt(this.pos + 2);
      if (next2 < 48 || next2 > 57) { return this.finishOp(extension_types$1.questionDot, 2) }
    }
    if (next === 63) {
      if (ecmaVersion >= 12) {
        var next2$1 = this.input.charCodeAt(this.pos + 2);
        if (next2$1 === 61) { return this.finishOp(extension_types$1.assign, 3) }
      }
      return this.finishOp(extension_types$1.coalesce, 2)
    }
  }
  return this.finishOp(extension_types$1.question, 1)
};

extension_pp.readToken_numberSign = function() { // '#'
  var ecmaVersion = this.options.ecmaVersion;
  var code = 35; // '#'
  if (ecmaVersion >= 13) {
    ++this.pos;
    code = this.fullCharCodeAtPos();
    if (extension_isIdentifierStart(code, true) || code === 92 /* '\' */) {
      return this.finishToken(extension_types$1.privateId, this.readWord1())
    }
  }

  this.raise(this.pos, "Unexpected character '" + extension_codePointToString(code) + "'");
};

extension_pp.getTokenFromCode = function(code) {
  switch (code) {
  // The interpretation of a dot depends on whether it is followed
  // by a digit or another two dots.
  case 46: // '.'
    return this.readToken_dot()

  // Punctuation tokens.
  case 40: ++this.pos; return this.finishToken(extension_types$1.parenL)
  case 41: ++this.pos; return this.finishToken(extension_types$1.parenR)
  case 59: ++this.pos; return this.finishToken(extension_types$1.semi)
  case 44: ++this.pos; return this.finishToken(extension_types$1.comma)
  case 91: ++this.pos; return this.finishToken(extension_types$1.bracketL)
  case 93: ++this.pos; return this.finishToken(extension_types$1.bracketR)
  case 123: ++this.pos; return this.finishToken(extension_types$1.braceL)
  case 125: ++this.pos; return this.finishToken(extension_types$1.braceR)
  case 58: ++this.pos; return this.finishToken(extension_types$1.colon)

  case 96: // '`'
    if (this.options.ecmaVersion < 6) { break }
    ++this.pos;
    return this.finishToken(extension_types$1.backQuote)

  case 48: // '0'
    var next = this.input.charCodeAt(this.pos + 1);
    if (next === 120 || next === 88) { return this.readRadixNumber(16) } // '0x', '0X' - hex number
    if (this.options.ecmaVersion >= 6) {
      if (next === 111 || next === 79) { return this.readRadixNumber(8) } // '0o', '0O' - octal number
      if (next === 98 || next === 66) { return this.readRadixNumber(2) } // '0b', '0B' - binary number
    }

  // Anything else beginning with a digit is an integer, octal
  // number, or float.
  case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: // 1-9
    return this.readNumber(false)

  // Quotes produce strings.
  case 34: case 39: // '"', "'"
    return this.readString(code)

  // Operators are parsed inline in tiny state machines. '=' (61) is
  // often referred to. `finishOp` simply skips the amount of
  // characters it is given as second argument, and returns a token
  // of the type given by its first argument.
  case 47: // '/'
    return this.readToken_slash()

  case 37: case 42: // '%*'
    return this.readToken_mult_modulo_exp(code)

  case 124: case 38: // '|&'
    return this.readToken_pipe_amp(code)

  case 94: // '^'
    return this.readToken_caret()

  case 43: case 45: // '+-'
    return this.readToken_plus_min(code)

  case 60: case 62: // '<>'
    return this.readToken_lt_gt(code)

  case 61: case 33: // '=!'
    return this.readToken_eq_excl(code)

  case 63: // '?'
    return this.readToken_question()

  case 126: // '~'
    return this.finishOp(extension_types$1.prefix, 1)

  case 35: // '#'
    return this.readToken_numberSign()
  }

  this.raise(this.pos, "Unexpected character '" + extension_codePointToString(code) + "'");
};

extension_pp.finishOp = function(type, size) {
  var str = this.input.slice(this.pos, this.pos + size);
  this.pos += size;
  return this.finishToken(type, str)
};

extension_pp.readRegexp = function() {
  var escaped, inClass, start = this.pos;
  for (;;) {
    if (this.pos >= this.input.length) { this.raise(start, "Unterminated regular expression"); }
    var ch = this.input.charAt(this.pos);
    if (extension_lineBreak.test(ch)) { this.raise(start, "Unterminated regular expression"); }
    if (!escaped) {
      if (ch === "[") { inClass = true; }
      else if (ch === "]" && inClass) { inClass = false; }
      else if (ch === "/" && !inClass) { break }
      escaped = ch === "\\";
    } else { escaped = false; }
    ++this.pos;
  }
  var pattern = this.input.slice(start, this.pos);
  ++this.pos;
  var flagsStart = this.pos;
  var flags = this.readWord1();
  if (this.containsEsc) { this.unexpected(flagsStart); }

  // Validate pattern
  var state = this.regexpState || (this.regexpState = new extension_RegExpValidationState(this));
  state.reset(start, pattern, flags);
  this.validateRegExpFlags(state);
  this.validateRegExpPattern(state);

  // Create Literal#value property value.
  var value = null;
  try {
    value = new RegExp(pattern, flags);
  } catch (e) {
    // ESTree requires null if it failed to instantiate RegExp object.
    // https://github.com/estree/estree/blob/a27003adf4fd7bfad44de9cef372a2eacd527b1c/es5.md#regexpliteral
  }

  return this.finishToken(extension_types$1.regexp, {pattern: pattern, flags: flags, value: value})
};

// Read an integer in the given radix. Return null if zero digits
// were read, the integer value otherwise. When `len` is given, this
// will return `null` unless the integer has exactly `len` digits.

extension_pp.readInt = function(radix, len, maybeLegacyOctalNumericLiteral) {
  // `len` is used for character escape sequences. In that case, disallow separators.
  var allowSeparators = this.options.ecmaVersion >= 12 && len === undefined;

  // `maybeLegacyOctalNumericLiteral` is true if it doesn't have prefix (0x,0o,0b)
  // and isn't fraction part nor exponent part. In that case, if the first digit
  // is zero then disallow separators.
  var isLegacyOctalNumericLiteral = maybeLegacyOctalNumericLiteral && this.input.charCodeAt(this.pos) === 48;

  var start = this.pos, total = 0, lastCode = 0;
  for (var i = 0, e = len == null ? Infinity : len; i < e; ++i, ++this.pos) {
    var code = this.input.charCodeAt(this.pos), val = (void 0);

    if (allowSeparators && code === 95) {
      if (isLegacyOctalNumericLiteral) { this.raiseRecoverable(this.pos, "Numeric separator is not allowed in legacy octal numeric literals"); }
      if (lastCode === 95) { this.raiseRecoverable(this.pos, "Numeric separator must be exactly one underscore"); }
      if (i === 0) { this.raiseRecoverable(this.pos, "Numeric separator is not allowed at the first of digits"); }
      lastCode = code;
      continue
    }

    if (code >= 97) { val = code - 97 + 10; } // a
    else if (code >= 65) { val = code - 65 + 10; } // A
    else if (code >= 48 && code <= 57) { val = code - 48; } // 0-9
    else { val = Infinity; }
    if (val >= radix) { break }
    lastCode = code;
    total = total * radix + val;
  }

  if (allowSeparators && lastCode === 95) { this.raiseRecoverable(this.pos - 1, "Numeric separator is not allowed at the last of digits"); }
  if (this.pos === start || len != null && this.pos - start !== len) { return null }

  return total
};

function extension_stringToNumber(str, isLegacyOctalNumericLiteral) {
  if (isLegacyOctalNumericLiteral) {
    return parseInt(str, 8)
  }

  // `parseFloat(value)` stops parsing at the first numeric separator then returns a wrong value.
  return parseFloat(str.replace(/_/g, ""))
}

function extension_stringToBigInt(str) {
  if (typeof BigInt !== "function") {
    return null
  }

  // `BigInt(value)` throws syntax error if the string contains numeric separators.
  return BigInt(str.replace(/_/g, ""))
}

extension_pp.readRadixNumber = function(radix) {
  var start = this.pos;
  this.pos += 2; // 0x
  var val = this.readInt(radix);
  if (val == null) { this.raise(this.start + 2, "Expected number in radix " + radix); }
  if (this.options.ecmaVersion >= 11 && this.input.charCodeAt(this.pos) === 110) {
    val = extension_stringToBigInt(this.input.slice(start, this.pos));
    ++this.pos;
  } else if (extension_isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
  return this.finishToken(extension_types$1.num, val)
};

// Read an integer, octal integer, or floating-point number.

extension_pp.readNumber = function(startsWithDot) {
  var start = this.pos;
  if (!startsWithDot && this.readInt(10, undefined, true) === null) { this.raise(start, "Invalid number"); }
  var octal = this.pos - start >= 2 && this.input.charCodeAt(start) === 48;
  if (octal && this.strict) { this.raise(start, "Invalid number"); }
  var next = this.input.charCodeAt(this.pos);
  if (!octal && !startsWithDot && this.options.ecmaVersion >= 11 && next === 110) {
    var val$1 = extension_stringToBigInt(this.input.slice(start, this.pos));
    ++this.pos;
    if (extension_isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
    return this.finishToken(extension_types$1.num, val$1)
  }
  if (octal && /[89]/.test(this.input.slice(start, this.pos))) { octal = false; }
  if (next === 46 && !octal) { // '.'
    ++this.pos;
    this.readInt(10);
    next = this.input.charCodeAt(this.pos);
  }
  if ((next === 69 || next === 101) && !octal) { // 'eE'
    next = this.input.charCodeAt(++this.pos);
    if (next === 43 || next === 45) { ++this.pos; } // '+-'
    if (this.readInt(10) === null) { this.raise(start, "Invalid number"); }
  }
  if (extension_isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }

  var val = extension_stringToNumber(this.input.slice(start, this.pos), octal);
  return this.finishToken(extension_types$1.num, val)
};

// Read a string value, interpreting backslash-escapes.

extension_pp.readCodePoint = function() {
  var ch = this.input.charCodeAt(this.pos), code;

  if (ch === 123) { // '{'
    if (this.options.ecmaVersion < 6) { this.unexpected(); }
    var codePos = ++this.pos;
    code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos);
    ++this.pos;
    if (code > 0x10FFFF) { this.invalidStringToken(codePos, "Code point out of bounds"); }
  } else {
    code = this.readHexChar(4);
  }
  return code
};

extension_pp.readString = function(quote) {
  var out = "", chunkStart = ++this.pos;
  for (;;) {
    if (this.pos >= this.input.length) { this.raise(this.start, "Unterminated string constant"); }
    var ch = this.input.charCodeAt(this.pos);
    if (ch === quote) { break }
    if (ch === 92) { // '\'
      out += this.input.slice(chunkStart, this.pos);
      out += this.readEscapedChar(false);
      chunkStart = this.pos;
    } else if (ch === 0x2028 || ch === 0x2029) {
      if (this.options.ecmaVersion < 10) { this.raise(this.start, "Unterminated string constant"); }
      ++this.pos;
      if (this.options.locations) {
        this.curLine++;
        this.lineStart = this.pos;
      }
    } else {
      if (extension_isNewLine(ch)) { this.raise(this.start, "Unterminated string constant"); }
      ++this.pos;
    }
  }
  out += this.input.slice(chunkStart, this.pos++);
  return this.finishToken(extension_types$1.string, out)
};

// Reads template string tokens.

var extension_INVALID_TEMPLATE_ESCAPE_ERROR = {};

extension_pp.tryReadTemplateToken = function() {
  this.inTemplateElement = true;
  try {
    this.readTmplToken();
  } catch (err) {
    if (err === extension_INVALID_TEMPLATE_ESCAPE_ERROR) {
      this.readInvalidTemplateToken();
    } else {
      throw err
    }
  }

  this.inTemplateElement = false;
};

extension_pp.invalidStringToken = function(position, message) {
  if (this.inTemplateElement && this.options.ecmaVersion >= 9) {
    throw extension_INVALID_TEMPLATE_ESCAPE_ERROR
  } else {
    this.raise(position, message);
  }
};

extension_pp.readTmplToken = function() {
  var out = "", chunkStart = this.pos;
  for (;;) {
    if (this.pos >= this.input.length) { this.raise(this.start, "Unterminated template"); }
    var ch = this.input.charCodeAt(this.pos);
    if (ch === 96 || ch === 36 && this.input.charCodeAt(this.pos + 1) === 123) { // '`', '${'
      if (this.pos === this.start && (this.type === extension_types$1.template || this.type === extension_types$1.invalidTemplate)) {
        if (ch === 36) {
          this.pos += 2;
          return this.finishToken(extension_types$1.dollarBraceL)
        } else {
          ++this.pos;
          return this.finishToken(extension_types$1.backQuote)
        }
      }
      out += this.input.slice(chunkStart, this.pos);
      return this.finishToken(extension_types$1.template, out)
    }
    if (ch === 92) { // '\'
      out += this.input.slice(chunkStart, this.pos);
      out += this.readEscapedChar(true);
      chunkStart = this.pos;
    } else if (extension_isNewLine(ch)) {
      out += this.input.slice(chunkStart, this.pos);
      ++this.pos;
      switch (ch) {
      case 13:
        if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; }
      case 10:
        out += "\n";
        break
      default:
        out += String.fromCharCode(ch);
        break
      }
      if (this.options.locations) {
        ++this.curLine;
        this.lineStart = this.pos;
      }
      chunkStart = this.pos;
    } else {
      ++this.pos;
    }
  }
};

// Reads a template token to search for the end, without validating any escape sequences
extension_pp.readInvalidTemplateToken = function() {
  for (; this.pos < this.input.length; this.pos++) {
    switch (this.input[this.pos]) {
    case "\\":
      ++this.pos;
      break

    case "$":
      if (this.input[this.pos + 1] !== "{") { break }
      // fall through
    case "`":
      return this.finishToken(extension_types$1.invalidTemplate, this.input.slice(this.start, this.pos))

    case "\r":
      if (this.input[this.pos + 1] === "\n") { ++this.pos; }
      // fall through
    case "\n": case "\u2028": case "\u2029":
      ++this.curLine;
      this.lineStart = this.pos + 1;
      break
    }
  }
  this.raise(this.start, "Unterminated template");
};

// Used to read escaped characters

extension_pp.readEscapedChar = function(inTemplate) {
  var ch = this.input.charCodeAt(++this.pos);
  ++this.pos;
  switch (ch) {
  case 110: return "\n" // 'n' -> '\n'
  case 114: return "\r" // 'r' -> '\r'
  case 120: return String.fromCharCode(this.readHexChar(2)) // 'x'
  case 117: return extension_codePointToString(this.readCodePoint()) // 'u'
  case 116: return "\t" // 't' -> '\t'
  case 98: return "\b" // 'b' -> '\b'
  case 118: return "\u000b" // 'v' -> '\u000b'
  case 102: return "\f" // 'f' -> '\f'
  case 13: if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; } // '\r\n'
  case 10: // ' \n'
    if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; }
    return ""
  case 56:
  case 57:
    if (this.strict) {
      this.invalidStringToken(
        this.pos - 1,
        "Invalid escape sequence"
      );
    }
    if (inTemplate) {
      var codePos = this.pos - 1;

      this.invalidStringToken(
        codePos,
        "Invalid escape sequence in template string"
      );
    }
  default:
    if (ch >= 48 && ch <= 55) {
      var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0];
      var octal = parseInt(octalStr, 8);
      if (octal > 255) {
        octalStr = octalStr.slice(0, -1);
        octal = parseInt(octalStr, 8);
      }
      this.pos += octalStr.length - 1;
      ch = this.input.charCodeAt(this.pos);
      if ((octalStr !== "0" || ch === 56 || ch === 57) && (this.strict || inTemplate)) {
        this.invalidStringToken(
          this.pos - 1 - octalStr.length,
          inTemplate
            ? "Octal literal in template string"
            : "Octal literal in strict mode"
        );
      }
      return String.fromCharCode(octal)
    }
    if (extension_isNewLine(ch)) {
      // Unicode new line characters after \ get removed from output in both
      // template literals and strings
      if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; }
      return ""
    }
    return String.fromCharCode(ch)
  }
};

// Used to read character escape sequences ('\x', '\u', '\U').

extension_pp.readHexChar = function(len) {
  var codePos = this.pos;
  var n = this.readInt(16, len);
  if (n === null) { this.invalidStringToken(codePos, "Bad character escape sequence"); }
  return n
};

// Read an identifier, and return it as a string. Sets `this.containsEsc`
// to whether the word contained a '\u' escape.
//
// Incrementally adds only escaped chars, adding other chunks as-is
// as a micro-optimization.

extension_pp.readWord1 = function() {
  this.containsEsc = false;
  var word = "", first = true, chunkStart = this.pos;
  var astral = this.options.ecmaVersion >= 6;
  while (this.pos < this.input.length) {
    var ch = this.fullCharCodeAtPos();
    if (extension_isIdentifierChar(ch, astral)) {
      this.pos += ch <= 0xffff ? 1 : 2;
    } else if (ch === 92) { // "\"
      this.containsEsc = true;
      word += this.input.slice(chunkStart, this.pos);
      var escStart = this.pos;
      if (this.input.charCodeAt(++this.pos) !== 117) // "u"
        { this.invalidStringToken(this.pos, "Expecting Unicode escape sequence \\uXXXX"); }
      ++this.pos;
      var esc = this.readCodePoint();
      if (!(first ? extension_isIdentifierStart : extension_isIdentifierChar)(esc, astral))
        { this.invalidStringToken(escStart, "Invalid Unicode escape"); }
      word += extension_codePointToString(esc);
      chunkStart = this.pos;
    } else {
      break
    }
    first = false;
  }
  return word + this.input.slice(chunkStart, this.pos)
};

// Read an identifier or keyword token. Will check for reserved
// words when necessary.

extension_pp.readWord = function() {
  var word = this.readWord1();
  var type = extension_types$1.name;
  if (this.keywords.test(word)) {
    type = extension_keywords[word];
  }
  return this.finishToken(type, word)
};

// Acorn is a tiny, fast JavaScript parser written in JavaScript.
//
// Acorn was written by Marijn Haverbeke, Ingvar Stepanyan, and
// various contributors and released under an MIT license.
//
// Git repositories for Acorn are available at
//
//     http://marijnhaverbeke.nl/git/acorn
//     https://github.com/acornjs/acorn.git
//
// Please use the [github bug tracker][ghbt] to report issues.
//
// [ghbt]: https://github.com/acornjs/acorn/issues
//
// [walk]: util/walk.js


var extension_version = "8.14.0";

extension_Parser.acorn = {
  Parser: extension_Parser,
  version: extension_version,
  defaultOptions: extension_defaultOptions,
  Position: extension_Position,
  SourceLocation: extension_SourceLocation,
  getLineInfo: extension_getLineInfo,
  Node: extension_Node,
  TokenType: extension_TokenType,
  tokTypes: extension_types$1,
  keywordTypes: extension_keywords,
  TokContext: extension_TokContext,
  tokContexts: extension_types,
  isIdentifierChar: extension_isIdentifierChar,
  isIdentifierStart: extension_isIdentifierStart,
  Token: extension_Token,
  isNewLine: extension_isNewLine,
  lineBreak: extension_lineBreak,
  lineBreakG: extension_lineBreakG,
  nonASCIIwhitespace: extension_nonASCIIwhitespace
};

// The main exported interface (under `self.acorn` when in the
// browser) is a `parse` function that takes a code string and returns
// an abstract syntax tree as specified by the [ESTree spec][estree].
//
// [estree]: https://github.com/estree/estree

function extension_parse(input, options) {
  return extension_Parser.parse(input, options)
}

// This function tries to parse a single expression at a given
// offset in a string. Useful for parsing mixed-language formats
// that embed JavaScript expressions.

function extension_parseExpressionAt(input, pos, options) {
  return extension_Parser.parseExpressionAt(input, pos, options)
}

// Acorn is organized as a tokenizer and a recursive-descent parser.
// The `tokenizer` export provides an interface to the tokenizer.

function extension_tokenizer(input, options) {
  return extension_Parser.tokenizer(input, options)
}



;// ../../node_modules/arquero/src/expression/constants.js
/* harmony default export */ const extension_constants = ({
  undefined: 'void(0)',
  Infinity:  'Number.POSITIVE_INFINITY',
  NaN:       'Number.NaN',
  E:         'Math.E',
  LN2:       'Math.LN2',
  LN10:      'Math.LN10',
  LOG2E:     'Math.LOG2E',
  LOG10E:    'Math.LOG10E',
  PI:        'Math.PI',
  SQRT1_2:   'Math.SQRT1_2',
  SQRT2:     'Math.SQRT2'
});
;// ../../node_modules/arquero/src/expression/parse-expression.js















const extension_PARSER_OPT = { ecmaVersion: 11 };
const extension_DEFAULT_PARAM_ID = '$';
const extension_DEFAULT_TUPLE_ID = 'd';
const extension_DEFAULT_TUPLE_ID1 = 'd1';
const extension_DEFAULT_TUPLE_ID2 = 'd2';

const extension_NO = msg => (node, ctx) => ctx.error(node, msg + ' not allowed');
const extension_ERROR_AGGREGATE = extension_NO('Aggregate function');
const extension_ERROR_WINDOW = extension_NO('Window function');
const extension_ERROR_ARGUMENT = 'Invalid argument';
const extension_ERROR_COLUMN = 'Invalid column reference';
const extension_ERROR_AGGRONLY = extension_ERROR_COLUMN + ' (must be input to an aggregate function)';
const extension_ERROR_FUNCTION = 'Invalid function call';
const extension_ERROR_MEMBER = 'Invalid member expression';
const extension_ERROR_OP_PARAMETER = 'Invalid operator parameter';
const extension_ERROR_PARAM = 'Invalid param reference';
const extension_ERROR_VARIABLE = 'Invalid variable reference';
const extension_ERROR_VARIABLE_OP = 'Variable not accessible in operator call';
const extension_ERROR_DECLARATION = 'Unsupported variable declaration';
const extension_ERROR_DESTRUCTURE = 'Unsupported destructuring pattern';
const extension_ERROR_CLOSURE = 'Table expressions do not support closures';
const extension_ERROR_ESCAPE = 'Use aq.escape(fn) to use a function as-is (including closures)';
const extension_ERROR_USE_PARAMS = 'use table.params({ name: value }) to define dynamic parameters';
const extension_ERROR_ADD_FUNCTION = 'use aq.addFunction(name, fn) to add new op functions';
const extension_ERROR_VARIABLE_NOTE = `\nNote: ${extension_ERROR_CLOSURE}. ${extension_ERROR_ESCAPE}, or ${extension_ERROR_USE_PARAMS}.`;
const extension_ERROR_FUNCTION_NOTE = `\nNote: ${extension_ERROR_CLOSURE}. ${extension_ERROR_ESCAPE}, or ${extension_ERROR_ADD_FUNCTION}.`;
const extension_ERROR_ROW_OBJECT = `The ${extension_row_object_ROW_OBJECT} method is not valid in multi-table expressions.`;

function extension_parseExpression(ctx, spec) {
  const ast = extension_parseAST(spec);
  let node = ctx.root = ast;
  ctx.spec = spec;
  ctx.tuple = null;
  ctx.tuple1 = null;
  ctx.tuple2 = null;
  ctx.$param = null;
  ctx.$op = 0;
  ctx.scope = new Set();
  ctx.paramsRef = new Map();
  ctx.columnRef = new Map();

  // parse input column parameters
  // if no function def, assume default tuple identifiers
  if (extension_isFunctionExpression(node)) {
    extension_parseFunction(node, ctx);
    node = node.body;
  } else if (ctx.join) {
    ctx.scope.add(ctx.tuple1 = extension_DEFAULT_TUPLE_ID1);
    ctx.scope.add(ctx.tuple2 = extension_DEFAULT_TUPLE_ID2);
    ctx.scope.add(ctx.$param = extension_DEFAULT_PARAM_ID);
  } else {
    ctx.scope.add(ctx.tuple = extension_DEFAULT_TUPLE_ID);
    ctx.scope.add(ctx.$param = extension_DEFAULT_PARAM_ID);
  }

  // rewrite column references & function calls
  extension_walk(node, ctx, extension_parse_expression_visitors);

  return ctx.root;
}

function extension_parseAST(expr) {
  try {
    const code = expr.field ? extension_fieldRef(expr)
      : extension_is_array(expr) ? extension_to_string(expr)
      : expr;
    return extension_parse(`expr=(${code})`, extension_PARSER_OPT).body[0].expression.right;
  } catch (err) {
    extension_util_error(`Expression parse error: ${expr+''}`, err);
  }
}

function extension_fieldRef(expr) {
  const col = JSON.stringify(expr+'');
  return !(expr.table || 0) ? `d=>d[${col}]` : `(a,b)=>b[${col}]`;
}

const extension_parse_expression_visitors = {
  FunctionDeclaration: extension_NO('Function definitions'),
  ForStatement: extension_NO('For loops'),
  ForOfStatement: extension_NO('For-of loops'),
  ForInStatement: extension_NO('For-in loops'),
  WhileStatement: extension_NO('While loops'),
  DoWhileStatement: extension_NO('Do-while loops'),
  AwaitExpression: extension_NO('Await expressions'),
  ArrowFunctionExpression: extension_NO('Function definitions'),
  AssignmentExpression: extension_NO('Assignments'),
  FunctionExpression: extension_NO('Function definitions'),
  NewExpression: extension_NO('Use of "new"'),
  UpdateExpression: extension_NO('Update expressions'),

  VariableDeclarator(node, ctx) {
    extension_handleDeclaration(node.id, ctx);
  },
  Identifier(node, ctx, parent) {
    if (extension_handleIdentifier(node, ctx, parent) && !ctx.scope.has(node.name)) {
      // handle identifier passed responsibility here
      // raise error if identifier not defined in scope
      ctx.error(node, extension_ERROR_VARIABLE, extension_ERROR_VARIABLE_NOTE);
    }
  },
  CallExpression(node, ctx) {
    const name = extension_functionName(node.callee);
    const def = extension_getAggregate(name) || extension_getWindow(name);

    // parse operator and rewrite invocation
    if (def) {
      if ((ctx.join || ctx.aggregate === false) && extension_hasAggregate(def)) {
        extension_ERROR_AGGREGATE(node, ctx);
      }
      if ((ctx.join || ctx.window === false) && extension_hasWindow(def)) {
        extension_ERROR_WINDOW(node, ctx);
      }

      ctx.$op = 1;
      if (ctx.ast) {
        extension_updateFunctionNode(node, name, ctx);
        node.arguments.forEach(arg => extension_walk(arg, ctx, extension_opVisitors));
      } else {
        const op = ctx.op(extension_parseOperator(ctx, def, name, node.arguments));
        Object.assign(node, { type: extension_constants_Op, name: op.id });
      }
      ctx.$op = 0;
      return false;
    } else if (extension_hasFunction(name)) {
      extension_updateFunctionNode(node, name, ctx);
    } else {
      ctx.error(node, extension_ERROR_FUNCTION, extension_ERROR_FUNCTION_NOTE);
    }
  },
  MemberExpression(node, ctx, parent) {
    const { object, property } = node;

    // bail if left head is not an identifier
    // in this case we will recurse and handle it later
    if (!extension_is(extension_Identifier, object)) return;
    const { name } = object;

    // allow use of Math prefix to access constant values
    if (extension_isMath(node) && extension_is(extension_Identifier, property)
        && extension_util_has(extension_constants, property.name)) {
      extension_updateConstantNode(node, property.name);
      return;
    }

    const index = name === ctx.tuple ? 0
      : name === ctx.tuple1 ? 1
      : name === ctx.tuple2 ? 2
      : -1;

    if (index >= 0) {
      // replace member expression with column ref
      return extension_spliceMember(node, index, ctx, extension_checkColumn, parent);
    } else if (name === ctx.$param) {
      // replace member expression with param ref
      return extension_spliceMember(node, index, ctx, extension_checkParam);
    } else if (ctx.paramsRef.has(name)) {
      extension_updateParameterNode(node, ctx.paramsRef.get(name));
    } else if (ctx.columnRef.has(name)) {
      extension_updateColumnNode(object, name, ctx, node);
    } else if (extension_util_has(ctx.params, name)) {
      extension_updateParameterNode(object, name);
    }
  }
};

function extension_spliceMember(node, index, ctx, check, parent) {
  const { property, computed } = node;
  let name;

  if (!computed) {
    name = property.name;
  } else if (extension_is(extension_Literal, property)) {
    name = property.value;
  } else try {
    name = ctx.param(property);
  } catch (e) {
    ctx.error(node, extension_ERROR_MEMBER);
  }

  check(node, name, index, ctx, parent);
  return false;
}

const extension_opVisitors = {
  ...extension_parse_expression_visitors,
  VariableDeclarator: extension_NO('Variable declaration in operator call'),
  Identifier(node, ctx, parent) {
    if (extension_handleIdentifier(node, ctx, parent)) {
      ctx.error(node, extension_ERROR_VARIABLE_OP);
    }
  },
  CallExpression(node, ctx) {
    const name = extension_functionName(node.callee);

    // rewrite if built-in function
    if (extension_hasFunction(name)) {
      extension_updateFunctionNode(node, name, ctx);
    } else {
      ctx.error(node, extension_ERROR_FUNCTION, extension_ERROR_FUNCTION_NOTE);
    }
  }
};

function extension_parseFunction(node, ctx) {
  if (node.generator) extension_NO('Generator functions')(node, ctx);
  if (node.async) extension_NO('Async functions')(node, ctx);

  const { params } = node;
  const len = params.length;
  const setc = index => (name, key) => ctx.columnRef.set(name, [key, index]);
  const setp = (name, key) => ctx.paramsRef.set(name, key);

  if (!len) {
    // do nothing
  } else if (ctx.join) {
    extension_parseRef(ctx, params[0], 'tuple1', setc(1));
    if (len > 1) extension_parseRef(ctx, params[1], 'tuple2', setc(2));
    if (len > 2) extension_parseRef(ctx, params[2], '$param', setp);
  } else {
    extension_parseRef(ctx, params[0], 'tuple', setc(0));
    if (len > 1) extension_parseRef(ctx, params[1], '$param', setp);
  }

  ctx.root = node.body;
}

function extension_parseRef(ctx, node, refName, alias) {
  if (extension_is(extension_Identifier, node)) {
    ctx.scope.add(node.name);
    ctx[refName] = node.name;
  } else if (extension_is(extension_ObjectPattern, node)) {
    node.properties.forEach(p => {
      const key = extension_is(extension_Identifier, p.key) ? p.key.name
        : extension_is(extension_Literal, p.key) ? p.key.value
        : ctx.error(p, extension_ERROR_ARGUMENT);
      if (!extension_is(extension_Identifier, p.value)) {
        ctx.error(p.value, extension_ERROR_DESTRUCTURE);
      }
      alias(p.value.name, key);
    });
  }
}

function extension_parseOperator(ctx, def, name, args) {
  const fields = [];
  const params = [];
  const idxFields = def.param[0] || 0;
  const idxParams = idxFields + (def.param[1] || 0);

  args.forEach((arg, index) => {
    if (index < idxFields) {
      extension_walk(arg, ctx, extension_opVisitors);
      fields.push(ctx.field(arg));
    } else if (index < idxParams) {
      extension_walk(arg, ctx, extension_opVisitors);
      params.push(ctx.param(arg));
    } else {
      ctx.error(arg, extension_ERROR_OP_PARAMETER);
    }
  });

  return { name, fields, params, ...(ctx.spec.window || {}) };
}

function extension_functionName(node) {
  return extension_is(extension_Identifier, node) ? node.name
    : !extension_is(extension_MemberExpression, node) ? null
    : extension_isMath(node) ? extension_rewriteMath(node.property.name)
    : node.property.name;
}

function extension_isMath(node) {
  return extension_is(extension_Identifier, node.object) && node.object.name === 'Math';
}

function extension_rewriteMath(name) {
  return name === 'max' ? 'greatest'
    : name === 'min' ? 'least'
    : name;
}

function extension_handleIdentifier(node, ctx, parent) {
  const { name } = node;

  if (extension_is(extension_MemberExpression, parent) && parent.property === node) {
    // do nothing: check head node, not nested properties
  } else if (extension_is(extension_Property, parent) && parent.key === node) {
    // do nothing: identifiers allowed in object expressions
  } else if (ctx.paramsRef.has(name)) {
    extension_updateParameterNode(node, ctx.paramsRef.get(name));
  } else if (ctx.columnRef.has(name)) {
    extension_updateColumnNode(node, name, ctx, parent);
  } else if (extension_util_has(ctx.params, name)) {
    extension_updateParameterNode(node, name);
  } else if (extension_util_has(extension_constants, name)) {
    extension_updateConstantNode(node, name);
  } else {
    return true;
  }
}

function extension_checkColumn(node, name, index, ctx, parent) {
  // check column existence if we have a backing table
  const table = index === 0 ? ctx.table
    : index > 0 ? ctx.join[index - 1]
    : null;
  const col = table && table.column(name);
  if (table && !col) {
    ctx.error(node, extension_ERROR_COLUMN);
  }

  // check if column reference is valid in current context
  if (ctx.aggronly && !ctx.$op) {
    ctx.error(node, extension_ERROR_AGGRONLY);
  }

  // rewrite ast node as a column access
  extension_rewrite(node, name, index, col, parent);
}

function extension_updateColumnNode(node, key, ctx, parent) {
  const [name, index] = ctx.columnRef.get(key);
  extension_checkColumn(node, name, index, ctx, parent);
}

function extension_checkParam(node, name, index, ctx) {
  if (ctx.params && !extension_util_has(ctx.params, name)) {
    ctx.error(node, extension_ERROR_PARAM);
  }
  extension_updateParameterNode(node, name);
}

function extension_updateParameterNode(node, name) {
  node.type = extension_Parameter;
  node.name = name;
}

function extension_updateConstantNode(node, name) {
  node.type = extension_Constant;
  node.name = name;
  node.raw = extension_constants[name];
}

function extension_updateFunctionNode(node, name, ctx) {
  if (name === extension_row_object_ROW_OBJECT) {
    const t = ctx.table;
    if (!t) ctx.error(node, extension_ERROR_ROW_OBJECT);
    extension_rowObjectExpression(node,
      node.arguments.length
        ? node.arguments.map(node => {
            const col = ctx.param(node);
            const name = extension_is_number(col) ? t.columnName(col) : col;
            if (!t.column(name)) ctx.error(node, extension_ERROR_COLUMN);
            return name;
          })
        : t.columnNames()
    );
  } else {
    node.callee = { type: extension_constants_Function, name };
  }
}

function extension_handleDeclaration(node, ctx) {
  if (extension_is(extension_Identifier, node)) {
    ctx.scope.add(node.name);
  } else if (extension_is(extension_ArrayPattern, node)) {
    node.elements.forEach(elm => extension_handleDeclaration(elm, ctx));
  } else if (extension_is(extension_ObjectPattern, node)) {
    node.properties.forEach(prop => extension_handleDeclaration(prop.value, ctx));
  } else {
    ctx.error(node.id, extension_ERROR_DECLARATION);
  }
}
;// ../../node_modules/arquero/src/expression/parse.js












const extension_ANNOTATE = { [extension_constants_Column]: 1, [extension_constants_Op]: 1 };

/* harmony default export */ function extension_expression_parse(input, opt = {}) {
  const generate = opt.generate || extension_codegen;
  const compiler = opt.compiler || extension_expression_compile;
  const params = extension_getParams(opt);
  const fields = {};
  const opcall = {};
  const names = [];
  const exprs = [];
  let fieldId = 0;
  let opId = -1;

  const compileExpr = opt.join ? compiler.join
    : opt.index == 1 ? compiler.expr2
    : compiler.expr;

  // parser context
  const ctx = {
    op(op) {
      const key = extension_opKey(op);
      return opcall[key] || (op.id = ++opId, opcall[key] = op);
    },
    field(node) {
      const code = generate(node);
      return fields[code] || (fields[code] = ++fieldId);
    },
    param(node) {
      return extension_is(extension_Literal, node)
        ? node.value
        : compiler.param(generate(node), params);
    },
    value(name, node) {
      names.push(name);
      const e = node.escape || (opt.ast
        ? extension_clean(node)
        : compileExpr(generate(node), params));
      exprs.push(e);
      // annotate expression if it is a direct column or op access
      // this permits downstream optimizations
      if (extension_ANNOTATE[node.type] && e !== node && extension_is_object(e)) {
        e.field = node.name;
      }
    },
    error(node, msg, note = '') {
      // both expresions and fields are parsed
      // with added code prefixes of length 6!
      const i = node.start - 6;
      const j = node.end - 6;
      const snippet = String(ctx.spec).slice(i, j);
      extension_util_error(`${msg}: "${snippet}"${note}`);
    }
  };

  // copy all options to context, potentially overwriting methods
  Object.assign(ctx, opt, { params });

  // parse each expression
  for (const [name, value] of extension_entries(input)) {
    ctx.value(
      name + '',
      value.escape
        ? extension_parse_escape(ctx, value, params)
        : extension_parseExpression(ctx, value)
    );
  }

  // return expression asts if requested
  if (opt.ast) {
    return { names, exprs };
  }

  // compile input field accessors
  const f = [];
  for (const key in fields) {
    f[fields[key]] = compiler.expr(key, params);
  }

  // resolve input fields to operations
  const ops = Object.values(opcall);
  ops.forEach(op => op.fields = op.fields.map(id => f[id]));

  return { names, exprs, ops };
}

function extension_opKey(op) {
  let key = `${op.name}(${op.fields.concat(op.params).join(',')})`;
  if (op.frame) {
    const frame = op.frame.map(v => Number.isFinite(v) ? Math.abs(v) : -1);
    key += `[${frame},${!!op.peers}]`;
  }
  return key;
}

function extension_getParams(opt) {
  return (opt.table ? extension_getTableParams(opt.table)
    : opt.join ? {
        ...extension_getTableParams(opt.join[1]),
        ...extension_getTableParams(opt.join[0])
      }
    : {}) || {};
}

function extension_getTableParams(table) {
  return table && extension_util_is_function(table.params) ? table.params() : {};
}
;// ../../node_modules/arquero/src/query/constants.js
const extension_Expr = 'Expr';
const extension_ExprList = 'ExprList';
const extension_ExprNumber = 'ExprNumber';
const extension_ExprObject = 'ExprObject';
const extension_JoinKeys = 'JoinKeys';
const extension_JoinValues = 'JoinValues';
const extension_Options = 'Options';
const extension_OrderbyKeys = 'OrderKeys';
const extension_SelectionList = 'SelectionList';
const extension_TableRef = 'TableRef';
const extension_TableRefList = 'TableRefList';

const extension_Descending = 'Descending';
const extension_constants_Query = 'Query';
const extension_Selection = 'Selection';
const extension_constants_Verb = 'Verb';
const extension_Window = 'Window';
;// ../../node_modules/arquero/src/helpers/wrap.js


/**
 * Annotate an expression in an object wrapper.
 * @param {string|Function|object} expr An expression to annotate.
 * @param {object} properties The properties to annotate with.
 * @return {object} A new wrapped expression object.
 */
/* harmony default export */ function extension_wrap(expr, properties) {
  return expr && expr.expr
    ? new extension_Wrapper({ ...expr, ...properties })
    : new extension_Wrapper(properties, expr);
}

class extension_Wrapper {
  constructor(properties, expr) {
    this.expr = expr;
    Object.assign(this, properties);
  }
  toString() {
    return String(this.expr);
  }
  toObject() {
    return {
      ...this,
      expr: this.toString(),
      ...(extension_util_is_function(this.expr) ? { func: true } : {})
    };
  }
}
;// ../../node_modules/arquero/src/helpers/desc.js


/**
 * Annotate a table expression to indicate descending sort order.
 * @param {string|Function|object} expr The table expression to annotate.
 * @return {object} A wrapped expression indicating descending sort.
 * @example desc('colA')
 * @example desc(d => d.colA)
 */
/* harmony default export */ function extension_desc(expr) {
  return extension_wrap(expr, { desc: true });
}
;// ../../node_modules/arquero/src/helpers/field.js


/**
 * Annotate an expression to indicate it is a string field reference.
 * @param {string|object} expr The column name, or an existing wrapped
 *  expression for a column name.
 * @param {string} [name] The column name to use. If provided, will
 *  overwrite the input expression value.
 * @param {number} [table=0] The table index of the field, in case of
 *  expressions over multiple tables.
 * @return A wrapped expression for a named column.
 * @example field('colA')
 */
/* harmony default export */ function extension_field(expr, name, table = 0) {
  const props = table ? { field: true, table } : { field: true };
  return extension_wrap(
    expr,
    name ? { expr: name, ...props } : props
  );
}
;// ../../node_modules/arquero/src/helpers/rolling.js


/**
 * Annotate a table expression to compute rolling aggregate or window
 * functions within a sliding window frame. For example, to specify a
 * rolling 7-day average centered on the current day, use rolling with
 * a frame value of [-3, 3].
 * @param {string|Function|object} expr The table expression to annotate.
 * @param {[number?, number?]} [frame=[-Infinity, 0]] The sliding window frame
 *  offsets. Each entry indicates an offset from the current value. If an
 *  entry is non-finite, the frame will be unbounded in that direction,
 *  including all preceding or following values. If unspecified, the frame
 *  will include the current values and all preceding values.
 * @param {boolean} [includePeers=false] Indicates if the sliding window frame
 *  should ignore peer (tied) values. If false (the default), the window frame
 *  boundaries are insensitive to peer values. If `true`, the window frame
 *  expands to include all peers. This parameter only affects operations that
 *  depend on the window frame: aggregate functions and the first_value,
 *  last_value, and nth_value window functions.
 * @return A new wrapped expression annotated with rolling window parameters.
 * @example rolling(d => mean(d.colA), [-3, 3])
 * @example rolling(d => last_value(d.colA), null, true)
 */
/* harmony default export */ function extension_rolling(expr, frame, includePeers) {
  return extension_wrap(expr, {
    window: {
      frame: frame || [-Infinity, 0],
      peers: !!includePeers
    }
  });
}
;// ../../node_modules/arquero/src/query/util.js














function extension_util_func(expr) {
  const f = d => d;
  f.toString = () => expr;
  return f;
}

function extension_getTable(catalog, ref) {
  ref = ref && extension_util_is_function(ref.query) ? ref.query() : ref;
  return ref && extension_util_is_function(ref.evaluate)
    ? ref.evaluate(null, catalog)
    : catalog(ref);
}

function extension_isSelection(value) {
  return extension_is_object(value) && (
    extension_is_array(value.all) ||
    extension_is_array(value.matches) ||
    extension_is_array(value.not) ||
    extension_is_array(value.range)
  );
}

function extension_util_toObject(value) {
  return value && extension_util_is_function(value.toObject) ? value.toObject()
    : extension_util_is_function(value) ? { expr: String(value), func: true }
    : extension_is_array(value) ? value.map(extension_util_toObject)
    : extension_is_object(value) ? extension_map_object(value, _ => extension_util_toObject(_))
    : value;
}

function extension_fromObject(value) {
  return extension_is_array(value) ? value.map(extension_fromObject)
    : !extension_is_object(value) ? value
    : extension_is_array(value.verbs) ? extension_query_Query.from(value)
    : extension_is_array(value.all) ? extension_selection_all()
    : extension_is_array(value.range) ? extension_range(...value.range)
    : extension_is_array(value.match) ? extension_matches(RegExp(...value.match))
    : extension_is_array(value.not) ? extension_not(value.not.map(extension_util_toObject))
    : extension_fromExprObject(value);
}

function extension_fromExprObject(value) {
  let output = value;
  let expr = value.expr;

  if (expr != null) {
    if (value.field === true) {
      output = expr = extension_field(expr);
    } else if (value.func === true) {
      output = expr = extension_util_func(expr);
    }

    if (extension_is_object(value.window)) {
      const { frame, peers } = value.window;
      output = expr = extension_rolling(expr, frame, peers);
    }

    if (value.desc === true) {
      output = extension_desc(expr);
    }
  }

  return value === output
    ? extension_map_object(value, _ => extension_fromObject(_))
    : output;
}

function extension_joinKeys(keys) {
  return extension_is_array(keys) ? keys.map(extension_parseJoinKeys)
    : keys;
}

function extension_parseJoinKeys(keys) {
  const list = [];

  extension_to_array(keys).forEach(param => {
    extension_is_number(param) ? list.push(param)
      : extension_is_string(param) ? list.push(extension_field(param, null))
      : extension_is_object(param) && param.expr ? list.push(param)
      : extension_util_is_function(param) ? list.push(param)
      : extension_util_error(`Invalid key value: ${param+''}`);
  });

  return list;
}

function extension_joinValues(values) {
  return extension_is_array(values)
    ? values.map(extension_parseJoinValues)
    : values;
}

function extension_parseJoinValues(values, index) {
  return index < 2 ? extension_to_array(values) : values;
}

function extension_orderbyKeys(keys) {
  const list = [];

  keys.forEach(param => {
    const expr = param.expr != null ? param.expr : param;
    if (extension_is_object(expr) && !extension_util_is_function(expr)) {
      for (const key in expr) {
        list.push(expr[key]);
      }
    } else {
      param = extension_is_number(expr) ? expr
        : extension_is_string(expr) ? extension_field(param)
        : extension_util_is_function(expr) ? param
        : extension_util_error(`Invalid orderby field: ${param+''}`);
      list.push(param);
    }
  });

  return list;
}
;// ../../node_modules/arquero/src/query/to-ast.js













const extension_Methods = {
  [extension_Expr]: extension_astExpr,
  [extension_ExprList]: extension_astExprList,
  [extension_ExprNumber]: extension_astExprNumber,
  [extension_ExprObject]: extension_astExprObject,
  [extension_JoinKeys]: extension_astJoinKeys,
  [extension_JoinValues]: extension_astJoinValues,
  [extension_OrderbyKeys]: extension_astExprList,
  [extension_SelectionList]: extension_astSelectionList
};

/* harmony default export */ function extension_to_ast(value, type, propTypes) {
  return type === extension_TableRef ? extension_astTableRef(value)
    : type === extension_TableRefList ? value.map(extension_astTableRef)
    : extension_ast(extension_util_toObject(value), type, propTypes);
}

function extension_ast(value, type, propTypes) {
  return type === extension_Options
    ? (value ? extension_astOptions(value, propTypes) : value)
    : extension_Methods[type](value);
}

function extension_astOptions(value, types = {}) {
  const output = {};
  for (const key in value) {
    const prop = value[key];
    output[key] = types[key] ? extension_ast(prop, types[key]) : prop;
  }
  return output;
}

function extension_astParse(expr, opt) {
  return extension_expression_parse({ expr }, { ...opt, ast: true }).exprs[0];
}

function extension_astColumn(name) {
  return { type: extension_constants_Column, name };
}

function extension_astColumnIndex(index) {
  return { type: extension_constants_Column, index };
}

function extension_astExprObject(obj, opt) {
  if (extension_is_string(obj)) {
    return extension_astParse(obj, opt);
  }

  if (obj.expr) {
    let ast;
    if (obj.field === true) {
      ast = extension_astColumn(obj.expr);
    } else if (obj.func === true) {
      ast = extension_astExprObject(obj.expr, opt);
    }
    if (ast) {
      if (obj.desc) {
        ast = { type: extension_Descending, expr: ast };
      }
      if (obj.window) {
        ast = { type: extension_Window, expr: ast, ...obj.window };
      }
      return ast;
    }
  }

  return Object.keys(obj)
    .map(key => ({
      ...extension_astExprObject(obj[key], opt),
      as: key
    }));
}

function extension_astSelection(sel) {
  const type = extension_Selection;
  return sel.all ? { type, operator: 'all' }
    : sel.not ? { type, operator: 'not', arguments: extension_astExprList(sel.not) }
    : sel.range ? { type, operator: 'range', arguments: extension_astExprList(sel.range) }
    : sel.matches ? { type, operator: 'matches', arguments: sel.matches }
    : extension_util_error('Invalid input');
}

function extension_astSelectionList(arr) {
  return extension_to_array(arr).map(extension_astSelectionItem).flat();
}

function extension_astSelectionItem(val) {
  return extension_isSelection(val) ? extension_astSelection(val)
    : extension_is_number(val) ? extension_astColumnIndex(val)
    : extension_is_string(val) ? extension_astColumn(val)
    : extension_is_object(val) ? Object.keys(val)
      .map(name => ({ type: extension_constants_Column, name, as: val[name] }))
    : extension_util_error('Invalid input');
}

function extension_astExpr(val) {
  return extension_isSelection(val) ? extension_astSelection(val)
    : extension_is_number(val) ? extension_astColumnIndex(val)
    : extension_is_string(val) ? extension_astColumn(val)
    : extension_is_object(val) ? extension_astExprObject(val)
    : extension_util_error('Invalid input');
}

function extension_astExprList(arr) {
  return extension_to_array(arr).map(extension_astExpr).flat();
}

function extension_astExprNumber(val) {
  return extension_is_number(val) ? val : extension_astExprObject(val);
}

function extension_astJoinKeys(val) {
  return extension_is_array(val)
    ? val.map(extension_astExprList)
    : extension_astExprObject(val, { join: true });
}

function extension_astJoinValues(val) {
  return extension_is_array(val)
    ? val.map((v, i) => i < 2
        ? extension_astExprList(v)
        : extension_astExprObject(v, { join: true })
      )
    : extension_astExprObject(val, { join: true });
}

function extension_astTableRef(value) {
  return value && extension_util_is_function(value.toAST)
    ? value.toAST()
    : value;
}
;// ../../node_modules/arquero/src/query/verb.js








/**
 * Model an Arquero verb as a serializable object.
 */
class extension_Verb {

  /**
   * Construct a new verb instance.
   * @param {string} verb The verb name.
   * @param {object[]} schema Schema describing verb parameters.
   * @param {any[]} params Array of parameter values.
   */
  constructor(verb, schema = [], params = []) {
    this.verb = verb;
    this.schema = schema;
    schema.forEach((s, index) => {
      const type = s.type;
      const param = params[index];
      const value = type === extension_JoinKeys ? extension_joinKeys(param)
        : type === extension_JoinValues ? extension_joinValues(param)
        : type === extension_OrderbyKeys ? extension_orderbyKeys(param)
        : param;
      this[s.name] = value !== undefined ? value : s.default;
    });
  }

  /**
   * Create new verb instance from the given serialized object.
   * @param {object} object A serialized verb representation, such as
   *  those generated by Verb.toObject.
   * @returns {Verb} The instantiated verb.
   */
  static from(object) {
    const verb = extension_verb_Verbs[object.verb];
    const params = (verb.schema || [])
      .map(({ name }) => extension_fromObject(object[name]));
    return verb(...params);
  }

  /**
   * Evaluate this verb against a given table and catalog.
   * @param {Table} table The Arquero table to process.
   * @param {Function} catalog A table lookup function that accepts a table
   *  name string as input and returns a corresponding Arquero table.
   * @returns {Table} The resulting Arquero table.
   */
  evaluate(table, catalog) {
    const params = this.schema.map(({ name, type }) => {
      const value = this[name];
      return type === extension_TableRef ? extension_getTable(catalog, value)
        : type === extension_TableRefList ? value.map(t => extension_getTable(catalog, t))
        : value;
    });
    return table[this.verb](...params);
  }

  /**
   * Serialize this verb as a JSON-compatible object. The resulting
   * object can be passed to Verb.from to re-instantiate this verb.
   * @returns {object} A JSON-compatible object representing this verb.
   */
  toObject() {
    const obj = { verb: this.verb };
    this.schema.forEach(({ name }) => {
      obj[name] = extension_util_toObject(this[name]);
    });
    return obj;
  }

  /**
   * Serialize this verb to a JSON-compatible abstract syntax tree.
   * All table expressions will be parsed and represented as AST instances
   * using a modified form of the Mozilla JavaScript AST format.
   * This method can be used to output parsed and serialized representations
   * to translate Arquero verbs to alternative data processing platforms.
   * @returns {object} A JSON-compatible abstract syntax tree object.
   */
  toAST() {
    const obj = { type: extension_constants_Verb, verb: this.verb };
    this.schema.forEach(({ name, type, props }) => {
      obj[name] = extension_to_ast(this[name], type, props);
    });
    return obj;
  }
}

/**
 * Verb parameter type.
 * @typedef {Expr|ExprList|ExprNumber|ExprObject|JoinKeys|JoinValues|Options|OrderbyKeys|SelectionList|TableRef|TableRefList} ParamType
 */

/**
 * Verb parameter schema.
 * @typedef {object} ParamDef
 * @property {string} name The name of the parameter.
 * @property {ParamType} type The type of the parameter.
 * @property {{ [key: string]: ParamType }} [props] Types for non-literal properties.
 */

/**
 * Create a new constructors.
 * @param {string} name The name of the verb.
 * @param {ParamDef[]} schema The verb parameter schema.
 * @return {Function} A verb constructor function.
 */
function extension_verb_createVerb(name, schema) {
  return Object.assign(
    (...params) => new extension_Verb(name, schema, params),
    { schema }
  );
}

/**
 * A lookup table of verb classes.
 */
const extension_verb_Verbs = {
  count:      extension_verb_createVerb('count', [
                { name: 'options', type: extension_Options }
              ]),
  derive:     extension_verb_createVerb('derive', [
                { name: 'values', type: extension_ExprObject },
                { name: 'options', type: extension_Options,
                  props: { before: extension_SelectionList, after: extension_SelectionList }
                }
              ]),
  filter:     extension_verb_createVerb('filter', [
                { name: 'criteria', type: extension_ExprObject }
              ]),
  groupby:    extension_verb_createVerb('groupby', [
                { name: 'keys', type: extension_ExprList }
              ]),
  orderby:    extension_verb_createVerb('orderby', [
                { name: 'keys', type: extension_OrderbyKeys }
              ]),
  relocate:   extension_verb_createVerb('relocate', [
                { name: 'columns', type: extension_SelectionList },
                { name: 'options', type: extension_Options,
                  props: { before: extension_SelectionList, after: extension_SelectionList }
                }
              ]),
  rename:     extension_verb_createVerb('rename', [
                { name: 'columns', type: extension_SelectionList }
              ]),
  rollup:     extension_verb_createVerb('rollup', [
                { name: 'values', type: extension_ExprObject }
              ]),
  sample:     extension_verb_createVerb('sample', [
                { name: 'size', type: extension_ExprNumber },
                { name: 'options', type: extension_Options, props: { weight: extension_Expr } }
              ]),
  select:     extension_verb_createVerb('select', [
                { name: 'columns', type: extension_SelectionList }
              ]),
  ungroup:    extension_verb_createVerb('ungroup'),
  unorder:    extension_verb_createVerb('unorder'),
  reify:      extension_verb_createVerb('reify'),
  dedupe:     extension_verb_createVerb('dedupe', [
                { name: 'keys', type: extension_ExprList, default: [] }
              ]),
  impute:     extension_verb_createVerb('impute', [
                { name: 'values', type: extension_ExprObject },
                { name: 'options', type: extension_Options, props: { expand: extension_ExprList } }
              ]),
  fold:       extension_verb_createVerb('fold', [
                { name: 'values', type: extension_ExprList },
                { name: 'options', type: extension_Options }
              ]),
  pivot:      extension_verb_createVerb('pivot', [
                { name: 'keys', type: extension_ExprList },
                { name: 'values', type: extension_ExprList },
                { name: 'options', type: extension_Options }
              ]),
  spread:     extension_verb_createVerb('spread', [
                { name: 'values', type: extension_ExprList },
                { name: 'options', type: extension_Options }
              ]),
  unroll:     extension_verb_createVerb('unroll', [
                { name: 'values', type: extension_ExprList },
                { name: 'options', type: extension_Options, props: { drop: extension_ExprList } }
              ]),
  lookup:     extension_verb_createVerb('lookup', [
                { name: 'table', type: extension_TableRef },
                { name: 'on', type: extension_JoinKeys },
                { name: 'values', type: extension_ExprList }
              ]),
  join:       extension_verb_createVerb('join', [
                { name: 'table', type: extension_TableRef },
                { name: 'on', type: extension_JoinKeys },
                { name: 'values', type: extension_JoinValues },
                { name: 'options', type: extension_Options }
              ]),
  cross:      extension_verb_createVerb('cross', [
                { name: 'table', type: extension_TableRef },
                { name: 'values', type: extension_JoinValues },
                { name: 'options', type: extension_Options }
              ]),
  semijoin:   extension_verb_createVerb('semijoin', [
                { name: 'table', type: extension_TableRef },
                { name: 'on', type: extension_JoinKeys }
              ]),
  antijoin:   extension_verb_createVerb('antijoin', [
                { name: 'table', type: extension_TableRef },
                { name: 'on', type: extension_JoinKeys }
              ]),
  concat:     extension_verb_createVerb('concat', [
                { name: 'tables', type: extension_TableRefList }
              ]),
  union:      extension_verb_createVerb('union', [
                { name: 'tables', type: extension_TableRefList }
              ]),
  intersect:  extension_verb_createVerb('intersect', [
                { name: 'tables', type: extension_TableRefList }
              ]),
  except:     extension_verb_createVerb('except', [
                { name: 'tables', type: extension_TableRefList }
              ])
};
;// ../../node_modules/arquero/src/query/query.js




/**
 * Create a new query instance. The query interface provides
 * a table-like verb API to construct a query that can be
 * serialized or evaluated against Arquero tables.
 * @param {string} [tableName] The name of the table to query. If
 *  provided, will be used as the default input table to pull from
 *  a provided catalog to run the query against.
 * @return {Query} A new builder instance.
 */
function extension_query(tableName) {
  return new extension_query_Query(null, null, tableName);
}

/**
 * Create a new query instance from a serialized object.
 * @param {object} object A serialized query representation, such as
 *  those generated by query(...).toObject().
 * @returns {Query} The instantiated query instance.
 */
function extension_queryFrom(object) {
  return extension_query_Query.from(object);
}

/**
 * Model a query as a collection of serializble verbs.
 * Provides a table-like interface for constructing queries.
 */
class extension_query_Query extends extension_Transformable {

  /**
   * Construct a new query instance.
   * @param {Verb[]} verbs An array of verb instances.
   * @param {object} [params] Optional query parameters, corresponding
   *  to parameter references in table expressions.
   * @param {string} [table] Optional name of the table to query.
   */
  constructor(verbs, params, table) {
    super(params);
    this._verbs = verbs || [];
    this._table = table;
  }

  /**
   * Create a new query instance from the given serialized object.
   * @param {QueryObject} object A serialized query representation, such as
   *  those generated by Query.toObject.
   * @returns {Query} The instantiated query.
   */
  static from({ verbs, table, params }) {
    return new extension_query_Query(verbs.map(extension_Verb.from), params, table);
  }

  /**
   * Provide an informative object string tag.
   */
  get [Symbol.toStringTag]() {
    if (!this._verbs) return 'Object'; // bail if called on prototype
    const ns = this._verbs.length;
    return `Query: ${ns} verbs` + (this._table ? ` on '${this._table}'` : '');
  }

  /**
   * Return the number of verbs in this query.
   */
  get length() {
    return this._verbs.length;
  }

  /**
   * Return the name of the table this query applies to.
   * @return {string} The name of the source table, or undefined.
   */
  get tableName() {
    return this._table;
  }

  /**
   * Get or set table expression parameter values.
   * If called with no arguments, returns the current parameter values
   * as an object. Otherwise, adds the provided parameters to this
   * query's parameter set and returns the table. Any prior parameters
   * with names matching the input parameters are overridden.
   * @param {object} values The parameter values.
   * @return {Query|object} The current parameter values (if called
   *  with no arguments) or this query.
   */
  params(values) {
    if (arguments.length) {
      this._params = { ...this._params, ...values };
      return this;
    } else {
      return this._params;
    }
  }

  /**
   * Evaluate this query against a given table and catalog.
   * @param {Table} table The Arquero table to process.
   * @param {Function} catalog A table lookup function that accepts a table
   *  name string as input and returns a corresponding Arquero table.
   * @returns {Table} The resulting Arquero table.
   */
  evaluate(table, catalog) {
    table = table || catalog(this._table);
    for (const verb of this._verbs) {
      table = verb.evaluate(table.params(this._params), catalog);
    }
    return table;
  }

  /**
   * Serialize this query as a JSON-compatible object. The resulting
   * object can be passed to Query.from to re-instantiate this query.
   * @returns {object} A JSON-compatible object representing this query.
   */
  toObject() {
    return extension_serialize(this, 'toObject');
  }

  /**
   * Serialize this query as a JSON-compatible object. The resulting
   * object can be passed to Query.from to re-instantiate this query.
   * This method simply returns the result of toObject, but is provided
   * as a separate method to allow later customization of JSON export.
   * @returns {object} A JSON-compatible object representing this query.
   */
  toJSON() {
    return this.toObject();
  }

  /**
   * Serialize this query to a JSON-compatible abstract syntax tree.
   * All table expressions will be parsed and represented as AST instances
   * using a modified form of the Mozilla JavaScript AST format.
   * This method can be used to output parsed and serialized representations
   * to translate Arquero queries to alternative data processing platforms.
   * @returns {object} A JSON-compatible abstract syntax tree object.
   */
  toAST() {
    return extension_serialize(this, 'toAST', { type: extension_constants_Query });
  }
}

/**
 * Serialized object representation of a query.
 * @typedef {object} QueryObject
 * @property {object[]} verbs An array of verb definitions.
 * @property {object} [params] An object of parameter values.
 * @property {string} [table] The name of the table to query.
 */

function extension_serialize(query, method, props) {
  return {
    ...props,
    verbs: query._verbs.map(verb => verb[method]()),
    ...(query._params ? { params: query._params } : null),
    ...(query._table ? { table: query._table } : null)
  };
}

function extension_query_append(qb, verb) {
  return new extension_query_Query(
    qb._verbs.concat(verb),
    qb._params,
    qb._table
  );
}

function extension_query_addQueryVerb(name, verb) {
  extension_query_Query.prototype[name] = function(...args) {
    return extension_query_append(this, verb(...args));
  };
}

// Internal verb handlers
for (const name in extension_verb_Verbs) {
  const verb = extension_verb_Verbs[name];
  extension_query_Query.prototype['__' + name] = function(qb, ...args) {
    return extension_query_append(qb, verb(...args));
  };
}
;// ../../node_modules/arquero/package.json
const extension_package_namespaceObject = {"rE":"4.8.8"};
;// ../../node_modules/arquero/src/arrow/arrow-dictionary.js


/**
 * Create a new Arquero column that proxies access to an
 * Apache Arrow dictionary column.
 * @param {object} vector An Apache Arrow dictionary column.
 */
/* harmony default export */ function extension_arrow_dictionary(vector) {
  const { chunks, dictionary, length, nullCount } = vector;
  const size = dictionary.length;
  const keys = extension_dictKeys(chunks || [vector], length, nullCount, size);
  const values = Array(size);

  const value = k => k == null || k < 0 || k >= size ? null
    : values[k] !== undefined ? values[k]
    : (values[k] = dictionary.get(k));

  return {
    vector,
    length,

    get: row => value(keys[row]),

    key: row => keys[row],

    keyFor(value) {
      if (value === null) return nullCount ? size : -1;
      for (let i = 0; i < size; ++i) {
        if (values[i] === undefined) values[i] = dictionary.get(i);
        if (values[i] === value) return i;
      }
      return -1;
    },

    groups(names) {
      const s = size + (nullCount ? 1 : 0);
      return { keys, get: [value], names, rows: extension_sequence(0, s), size: s };
    },

    [Symbol.iterator]() {
      return vector[Symbol.iterator]();
    }
  };
}

/**
 * Generate a dictionary key array
 * @param {object[]} chunks Arrow column chunks
 * @param {number} length The length of the Arrow column
 * @param {number} nulls The count of column null values
 * @param {number} size The backing dictionary size
 */
function extension_dictKeys(chunks, length, nulls, size) {
  const v = chunks.length > 1 || nulls
    ? extension_flatten(chunks, length, chunks[0].type.indices)
    : chunks[0].values;
  return nulls ? extension_nullKeys(chunks, v, size) : v;
}

/**
 * Flatten Arrow column chunks into a single array.
 */
function extension_flatten(chunks, length, type) {
  const array = new type.ArrayType(length);
  const n = chunks.length;
  for (let i = 0, idx = 0, len; i < n; ++i) {
    len = chunks[i].length;
    array.set(chunks[i].values.subarray(0, len), idx);
    idx += len;
  }
  return array;
}

/**
 * Encode null values as an additional dictionary key.
 * Returns a new key array with null values added.
 * TODO: safeguard against integer overflow?
 */
function extension_nullKeys(chunks, keys, key) {
  // iterate over null bitmaps, encode null values as key
  const n = chunks.length;
  for (let i = 0, idx = 0, m, base, bits, byte; i < n; ++i) {
    bits = chunks[i].nullBitmap;
    m = chunks[i].length >> 3;
    if (bits && bits.length) {
      for (let j = 0; j <= m; ++j) {
        if ((byte = bits[j]) !== 255) {
          base = idx + (j << 3);
          if ((byte & (1 << 0)) === 0) keys[base + 0] = key;
          if ((byte & (1 << 1)) === 0) keys[base + 1] = key;
          if ((byte & (1 << 2)) === 0) keys[base + 2] = key;
          if ((byte & (1 << 3)) === 0) keys[base + 3] = key;
          if ((byte & (1 << 4)) === 0) keys[base + 4] = key;
          if ((byte & (1 << 5)) === 0) keys[base + 5] = key;
          if ((byte & (1 << 6)) === 0) keys[base + 6] = key;
          if ((byte & (1 << 7)) === 0) keys[base + 7] = key;
        }
      }
    }
    idx += chunks[i].length;
  }
  return keys;
}
;// ../../node_modules/arquero/src/util/unroll.js
/* harmony default export */ function extension_unroll(args, code, ...lists) {
  const v = ['_', '$'];
  const a = v.slice(0, lists.length);
  a.push('"use strict"; const '
    + lists
        .map((l, j) => l.map((_, i) => `${v[j]}${i} = ${v[j]}[${i}]`).join(', '))
        .join(', ')
    + `; return (${args}) => ${code};`
  );
  return Function(...a)(...lists);
}
;// ../../node_modules/arquero/src/arrow/arrow-column.js







const extension_isList = id => id === extension_arrow_types.List || id === extension_arrow_types.FixedSizeList;

/**
 * Create an Arquero column that proxies access to an Arrow column.
 * @param {object} arrow An Apache Arrow column.
 * @return {import('../table/column').ColumnType} An Arquero-compatible column.
 */
function extension_arrowColumn(arrow, nested) {
  if (arrow.dictionary) return extension_arrow_dictionary(arrow);
  const { typeId, chunks, length, numChildren } = arrow;
  const vector = chunks && chunks.length === 1 ? chunks[0] : arrow;
  const get = numChildren && nested ? extension_getNested(vector)
    : numChildren ? extension_memoize(extension_getNested(vector))
    : typeId === extension_arrow_types.Utf8 ? extension_memoize(row => vector.get(row))
    : null;

  return get
    ? { vector, length, get, [Symbol.iterator]: () => extension_iterator(length, get) }
    : vector;
}

function extension_memoize(get) {
  const values = [];
  return row => {
    const v = values[row];
    return v !== undefined ? v : (values[row] = get(row));
  };
}

function* extension_iterator(n, get) {
  for (let i = 0; i < n; ++i) {
    yield get(i);
  }
}

const extension_arrayFrom = vector => vector.numChildren
  ? extension_util_repeat(vector.length, extension_getNested(vector))
  : vector.nullCount ? [...vector]
  : vector.toArray();

const extension_getNested = vector => extension_isList(vector.typeId) ? extension_arrow_column_getList(vector)
  : vector.typeId === extension_arrow_types.Struct ? extension_arrow_column_getStruct(vector)
  : extension_util_error(`Unsupported Arrow type: ${extension_to_string(vector.VectorName)}`);

const extension_arrow_column_getList = vector => vector.nullCount
  ? row => vector.isValid(row) ? extension_arrayFrom(vector.get(row)) : null
  : row => extension_arrayFrom(vector.get(row));

function extension_arrow_column_getStruct(vector) {
  const props = [];
  const code = [];
  vector.type.children.forEach((field, i) => {
    props.push(extension_arrowColumn(vector.getChildAt(i), true));
    code.push(`${extension_to_string(field.name)}:_${i}.get(row)`);
  });
  const get = extension_unroll('row', '({' + code + '})', props);

  return vector.nullCount
    ? row => vector.isValid(row) ? get(row) : null
    : get;
}
;// ../../node_modules/arquero/src/table/bit-set.js
const extension_ONE = 0x80000000;
const extension_ALL = 0xFFFFFFFF;

/**
 * Represent an indexable set of bits.
 */
class extension_BitSet {
  /**
   * Instantiate a new BitSet instance.
   * @param {number} size The number of bits.
   */
  constructor(size) {
    this._size = size;
    this._bits = new Uint32Array(Math.ceil(size / 32));
  }

  /**
   * The number of bits.
   * @return {number}
   */
  get length() {
    return this._size;
  }

  /**
   * The number of bits set to one.
   * https://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetKernighan
   * @return {number}
   */
  count() {
    const n = this._bits.length;
    let count = 0;
    for (let i = 0; i < n; ++i) {
      for (let b = this._bits[i]; b; ++count) {
        b &= b - 1;
      }
    }
    return count;
  }

  /**
   * Get the bit at a given index.
   * @param {number} i The bit index.
   */
  get(i) {
    return this._bits[i >> 5] & (extension_ONE >>> i);
  }

  /**
   * Set the bit at a given index to one.
   * @param {number} i The bit index.
   */
  set(i) {
    this._bits[i >> 5] |= (extension_ONE >>> i);
  }

  /**
   * Clear the bit at a given index to zero.
   * @param {number} i The bit index.
   */
  clear(i) {
    this._bits[i >> 5] &= ~(extension_ONE >>> i);
  }

  /**
   * Scan the bits, invoking a callback function with the index of
   * each non-zero bit.
   * @param {(i: number) => void} fn A callback function.
   */
  scan(fn) {
    for (let i = this.next(0); i >= 0; i = this.next(i + 1)) {
      fn(i);
    }
  }

  /**
   * Get the next non-zero bit starting from a given index.
   * @param {number} i The bit index.
   */
  next(i) {
    const bits = this._bits;
    const n = bits.length;

    let index = i >> 5;
    let curr = bits[index] & (extension_ALL >>> i);

    for (; index < n; curr = bits[++index]) {
      if (curr !== 0) {
        return (index << 5) + Math.clz32(curr);
      }
    }

    return -1;
  }

  /**
   * Return the index of the nth non-zero bit.
   * @param {number} n The number of non-zero bits to advance.
   * @return {number} The index of the nth non-zero bit.
   */
  nth(n) {
    let i = this.next(0);
    while (n-- && i >= 0) i = this.next(i + 1);
    return i;
  }

  /**
   * Negate all bits in this bitset.
   * Modifies this BitSet in place.
   * @return {this}
   */
  not() {
    const bits = this._bits;
    const n = bits.length;

    // invert all bits
    for (let i = 0; i < n; ++i) {
      bits[i] = ~bits[i];
    }

    // unset extraneous trailing bits
    const tail = this._size % 32;
    if (tail) {
      bits[n - 1] &= extension_ONE >> (tail - 1);
    }

    return this;
  }

  /**
   * Compute the logical AND of this BitSet and another.
   * @param {BitSet} bitset The BitSet to combine with.
   * @return {BitSet} This BitSet updated with the logical AND.
   */
  and(bitset) {
    if (bitset) {
      const a = this._bits;
      const b = bitset._bits;
      const n = a.length;

      for (let i = 0; i < n; ++i) {
        a[i] &= b[i];
      }
    }
    return this;
  }

  /**
   * Compute the logical OR of this BitSet and another.
   * @param {BitSet} bitset The BitSet to combine with.
   * @return {BitSet} This BitSet updated with the logical OR.
   */
  or(bitset) {
    if (bitset) {
      const a = this._bits;
      const b = bitset._bits;
      const n = a.length;

      for (let i = 0; i < n; ++i) {
        a[i] |= b[i];
      }
    }
    return this;
  }
}
;// ../../node_modules/arquero/src/format/from-arrow.js







/**
 * Options for Apache Arrow import.
 * @typedef {object} ArrowOptions
 * @property {import('../table/transformable').Select} columns
 *  An ordered set of columns to import. The input may consist of column name
 *  strings, column integer indices, objects with current column names as keys
 *  and new column names as values (for renaming), or selection helper
 *  functions such as {@link all}, {@link not}, or {@link range}.
 */

/**
 * Create a new table backed by an Apache Arrow table instance.
 * @param {object} arrow An Apache Arrow data table or byte buffer.
 * @param {ArrowOptions} options Options for Arrow import.
 * @return {ColumnTable} A new table containing the imported values.
 */
/* harmony default export */ function extension_from_arrow(arrow, options = {}) {
  arrow = extension_arrow_table_from(arrow);
  const { chunks, length, schema } = arrow;

  // resolve column selection
  const fields = schema.fields.map(f => f.name);
  const sel = extension_resolve({
    columnNames: test => test ? fields.filter(test) : fields.slice(),
    columnIndex: name => fields.indexOf(name)
  }, options.columns || extension_selection_all());

  // build Arquero columns for backing Arrow columns
  const cols = extension_column_set();
  sel.forEach((name, key) => {
    cols.add(name, extension_arrowColumn(arrow.getColumn(key)));
  });

  // build row filter bit mask as needed
  const bits = arrow.count() !== length ? new extension_BitSet(length) : null;
  if (bits) {
    let b = 0;
    let c = 0;
    arrow.scan(
      idx => bits.set(b + idx),
      batch => { while (chunks[c] !== batch) b += chunks[c++].length; }
    );
  }

  return new extension_column_table_ColumnTable(cols.data, cols.names, bits);
}
;// ../../node_modules/arquero/src/util/parse-values.js



const extension_parseBoolean = [ // boolean
  v => (v === 'true') || (v === 'false'),
  v => v === 'false' ? false : true
];

const extension_parseNumber = [ // number
  v => v === 'NaN' || (v = +v) === v,
  v => +v
];

const extension_parseDate = [ // iso date
  extension_is_iso_date_string,
  v => new Date(Date.parse(v))
];

function extension_numberParser(options) {
  const { decimal } = options;
  return decimal && decimal !== '.'
    ? extension_parseNumber.map(f => s => f(s && s.replace(decimal, '.')))
    : extension_parseNumber;
}

/* harmony default export */ function extension_parse_values(values, options) {
  const types = [extension_parseBoolean, extension_numberParser(options), extension_parseDate];
  const n = types.length;
  for (let i = 0; i < n; ++i) {
    const [test, parser] = types[i];
    if (extension_check(values, test)) {
      return parser;
    }
  }
  return identity;
}

function extension_check(values, test) {
  const n = values.length;
  for (let i = 0; i < n; ++i) {
    const v = values[i];
    if (v != null && !test(v)) {
      return false;
    }
  }
  return true;
}
;// ../../node_modules/arquero/src/format/from-text-rows.js






function extension_defaultNames(n, off = 0) {
  return repeat(n - off, i => `col${i + off + 1}`);
}

/* harmony default export */ function extension_from_text_rows(next, names, options) {
  let row = next();
  const n = row.length;
  const automax = +options.autoMax || 1000;
  const values = repeat(n, () => []);
  names = names
    ? names.length < n ? [...names, extension_defaultNames(n, names.length)] : names
    : extension_defaultNames(n);

  // read in initial rows to guess types
  let idx = 0;
  for (; idx < automax && row; ++idx, row = next()) {
    for (let i = 0; i < n; ++i) {
      values[i].push(row[i] === '' ? null : row[i]);
    }
  }

  // initialize parsers
  const parsers = extension_getParsers(names, values, options);

  // apply parsers
  parsers.forEach((parse, i) => {
    if (parse === identity) return;
    const v = values[i];
    for (let r = 0; r < idx; ++r) {
      if (v[r] != null) v[r] = parse(v[r]);
    }
  });

  // parse remainder of file
  for (; row; row = next()) {
    for (let i = 0; i < n; ++i) {
      values[i].push(row[i] ? parsers[i](row[i]) : null);
    }
  }

  const columns = {};
  names.forEach((name, i) => columns[name] = values[i]);
  return new ColumnTable(columns, names);
}

function extension_getParsers(names, values, options) {
  const { parse = {} } = options;
  const noParse = options.autoType === false;

  return names.map(
    (name, i) => isFunction(parse[name]) ? parse[name]
      : noParse ? identity
      : valueParser(values[i], options)
  );
}
;// ../../node_modules/arquero/src/format/parse/constants.js
const extension_constants_EOL = {};
const extension_constants_EOF = {};
const extension_constants_QUOTE = 34;
const extension_constants_NEWLINE = 10;
const extension_constants_RETURN = 13;
;// ../../node_modules/arquero/src/format/parse/parse-delimited.js




// Adapted from d3-dsv: https://github.com/d3/d3-dsv/blob/master/src/dsv.js
// Copyright 2013-2016 Mike Bostock
// All rights reserved.
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright notice, this
//   list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
// * Neither the name of the author nor the names of contributors may be used to
//   endorse or promote products derived from this software without specific prior
//   written permission.
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

/* harmony default export */ function extension_parse_delimited(text, { delimiter = ',', skip, comment }) {
  if (delimiter.length !== 1) {
    error(`Text "delimiter" should be a single character, found "${delimiter}"`);
  }
  const delimCode = delimiter.charCodeAt(0);

  let N = text.length;
  let I = 0; // current character index
  let t; // current token
  let eof = N <= 0; // current token followed by EOF?
  let eol = false; // current token followed by EOL?

  // Strip the trailing newline.
  if (text.charCodeAt(N - 1) === NEWLINE) --N;
  if (text.charCodeAt(N - 1) === RETURN) --N;

  function token() {
    if (eof) return EOF;
    if (eol) return eol = false, EOL;

    // Unescape quotes.
    const j = I;
    let i, c;
    if (text.charCodeAt(j) === QUOTE) {
      while (I++ < N && text.charCodeAt(I) !== QUOTE || text.charCodeAt(++I) === QUOTE);
      if ((i = I) >= N) eof = true;
      else if ((c = text.charCodeAt(I++)) === NEWLINE) eol = true;
      else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
      return text.slice(j + 1, i - 1).replace(/""/g, '"');
    }

    // Find next delimiter or newline.
    while (I < N) {
      if ((c = text.charCodeAt(i = I++)) === NEWLINE) eol = true;
      else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
      else if (c !== delimCode) continue;
      return text.slice(j, i);
    }

    // Return last token before EOF.
    return eof = true, text.slice(j, N);
  }

  function next() {
    if ((t = token()) !== EOF) {
      const row = [];
      while (t !== EOL && t !== EOF) row.push(t), t = token();
      return row;
    }
  }

  return filter(
    next, skip,
    comment && (x => (x && x[0] || '').startsWith(comment))
  );
}
;// ../../node_modules/arquero/src/format/from-csv.js
 // eslint-disable-line no-unused-vars




/**
 * Options for CSV parsing.
 * @typedef {object} CSVParseOptions
 * @property {string} [delimiter=','] Single-character delimiter between values.
 * @property {string} [decimal='.'] Single-character numeric decimal separator.
 * @property {boolean} [header=true] Flag to specify presence of header row.
 *  If true, assumes the CSV contains a header row with column names. If false,
 *  indicates the CSV does not contain a header row; columns are given the
 *  names 'col1', 'col2', etc unless the *names* option is specified.
 * @property {string[]} [names] An array of column names to use for header-less
 *  CSV files. This option is ignored if the header option is true.
 * @property {number} [skip=0] The number of lines to skip before reading data.
 * @property {string} [comment] A string used to identify comment lines. Any
 *  lines that start with the comment pattern are skipped.
 * @property {boolean} [autoType=true] Flag for automatic type inference.
 * @property {number} [autoMax=1000] Maximum number of initial values to use
 *  for type inference.
 * @property {Object.<string, (value: string) => any>} [parse] Object of
 *  column parsing options. The object keys should be column names. The object
 *  values should be parsing functions that transform values upon input.
 */

/**
 * Parse a comma-separated values (CSV) string into a table. Other
 * delimiters, such as tabs or pipes ('|'), can be specified using
 * the options argument. By default, automatic type inference is performed
 * for input values; string values that match the ISO standard
 * date format are parsed into JavaScript Date objects. To disable this
 * behavior, set the autoType option to false. To perform custom parsing
 * of input column values, use the parse option.
 * @param {string} text A string in a delimited-value format.
 * @param {CSVParseOptions} options The formatting options.
 * @return {ColumnTable} A new table containing the parsed values.
 */
/* harmony default export */ function extension_from_csv(text, options = {}) {
  const next = parseDelimited(text, options);
  return fromTextRows(
    next,
    options.header !== false ? next() : options.names,
    options
  );
}
;// ../../node_modules/arquero/src/format/parse/parse-lines.js



/* harmony default export */ function extension_parse_lines(text, { skip, comment }) {
  let N = text.length;
  let I = 0; // current character index

  // Strip the trailing newline.
  if (text.charCodeAt(N - 1) === NEWLINE) --N;
  if (text.charCodeAt(N - 1) === RETURN) --N;

  function read() {
    if (I >= N) return;

    const j = I;
    let eol = false;
    let i, c;

    // Find next newline.
    while (I < N) {
      if ((c = text.charCodeAt(i = I++)) === NEWLINE) eol = true;
      else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
      if (eol) return text.slice(j, i);
    }

    // Return last line before EOF.
    return text.slice(j, N);
  }

  return filter(
    read, skip,
    comment && (x => (x || '').startsWith(comment))
  );
}
;// ../../node_modules/arquero/src/format/from-fixed.js
 // eslint-disable-line no-unused-vars





/**
 * Options for fixed width file parsing.
 * @typedef {object} FixedParseOptions
 * @property {[number, number][]} [positions] Array of start, end indices for
 *  fixed-width columns.
 * @property {number[]} [widths] Array of fixed column widths. This option is
 *  ignored if the positions property is specified.
 * @property {string[]} [names] An array of column names. The array length
 *  should match the length of the positions array. If not specified or
 *  shorter than the positions array, default column names are generated.
 * @property {string} [decimal='.'] Single-character numeric decimal separator.
 * @property {number} [skip=0] The number of lines to skip before reading data.
 * @property {string} [comment] A string used to identify comment lines. Any
 *  lines that start with the comment pattern are skipped.
 * @property {boolean} [autoType=true] Flag for automatic type inference.
 * @property {number} [autoMax=1000] Maximum number of initial values to use
 *  for type inference.
 * @property {Object.<string, (value: string) => any>} [parse] Object of
 *  column parsing options. The object keys should be column names. The object
 *  values should be parsing functions that transform values upon input.
 */

/**
 * Parse a fixed-width file (FWF) string into a table. By default, automatic
 * type inference is performed for input values; string values that match the
 * ISO standard date format are parsed into JavaScript Date objects. To
 * disable this behavior, set the autoType option to false. To perform custom
 * parsing of input column values, use the parse option.
 * @param {string} text A string in a fixed-width file format.
 * @param {FixedParseOptions} options The formatting options.
 * @return {ColumnTable} A new table containing the parsed values.
 */
/* harmony default export */ function extension_from_fixed(text, options = {}) {
  const read = parseLines(text, options);
  const p = extension_positions(options);
  return fromTextRows(
    () => {
      const line = read();
      if (line) {
        return p.map(([i, j]) => line.slice(i, j).trim());
      }
    },
    options.names,
    options
  );
}

function extension_positions({ positions, widths }) {
  if (!positions && !widths) {
    error('Fixed width files require a "positions" or "widths" option');
  }
  let i = 0;
  return positions || widths.map(w => [i, i += w]);
}
;// ../../node_modules/arquero/src/format/from-json.js








/**
 * Options for JSON parsing.
 * @typedef {object} JSONParseOptions
 * @property {boolean} [autoType=true] Flag controlling automatic type
 *  inference. If false, date parsing for input JSON strings is disabled.
 * @property {Object.<string, (value: any) => any>} [parse] Object of column
 *  parsing options. The object keys should be column names. The object values
 *  should be parsing functions that transform values upon input.
 */

/**
 * Parse JavaScript Object Notation (JSON) data into a table.
 * The expected JSON data format is an object with column names for keys
 * and column value arrays for values. By default string values that match
 * the ISO standard date format are parsed into JavaScript Date objects.
 * To disable this behavior, set the autoType option to false. To perform
 * custom parsing of input column values, use the parse option. Auto-type
 * parsing is not performed for columns with custom parse options.
 * The data payload can also be provided as the "data" property of an
 * enclosing object, with an optional "schema" property containing table
 * metadata such as a "fields" array of ordered column information.
 * @param {string|object} data A string in JSON format, or pre-parsed object.
 * @param {JSONParseOptions} options The formatting options.
 * @return {ColumnTable} A new table containing the parsed values.
 */
/* harmony default export */ function extension_from_json(json, options = {}) {
  const autoType = defaultTrue(options.autoType);

  // parse string input
  if (isString(json)) {
    json = JSON.parse(json);
  }

  // separate schema and data, as needed
  let data = json.data, names;
  if (isObject(data) && !isArrayType(data)) {
    if (json.schema && json.schema.fields) {
      names = json.schema.fields.map(f => f.name);
    }
  } else {
    data = json;
  }

  // parse values as necessary
  if (autoType || options.parse) {
    const parsers = options.parse || {};
    for (const name in data) {
      const col = data[name];
      const len = col.length;
      if (parsers[name]) {
        // apply custom parser
        for (let i = 0; i < len; ++i) {
          col[i] = parsers[name](col[i]);
        }
      } else if (autoType) {
        // apply autoType parser
        for (let i = 0; i < len; ++i) {
          const val = col[i];
          if (isString(val) && isISODateString(val) && !isDigitString(val)) {
            col[i] = new Date(val);
          }
        }
      }
    }
  }

  return new ColumnTable(data, names);
}
;// ../../node_modules/arquero/src/verbs/dedupe.js
/* harmony default export */ function extension_dedupe(table, keys = []) {
  return table
    .groupby(keys.length ? keys : table.columnNames())
    .filter('row_number() === 1')
    .ungroup()
    .reify();
}
;// ../../node_modules/arquero/src/engine/select.js




/* harmony default export */ function extension_engine_select(table, columns) {
  const cols = extension_column_set();

  columns.forEach((value, curr) => {
    const next = extension_is_string(value) ? value : curr;
    if (next) {
      const col = table.column(curr) || extension_util_error(`Unrecognized column: ${curr}`);
      cols.add(next, col);
    }
  });

  return table.create(cols);
}
;// ../../node_modules/arquero/src/verbs/relocate.js




/* harmony default export */ function extension_relocate(table, columns, { before, after } = {}) {
  const bef = before != null;
  const aft = after != null;

  if (!(bef || aft)) {
    extension_util_error('relocate requires a before or after option.');
  }
  if (bef && aft) {
    extension_util_error('relocate accepts only one of the before or after options.');
  }

  columns = extension_resolve(table, columns);
  const anchors = [...extension_resolve(table, bef ? before : after).keys()];
  const anchor = bef ? anchors[0] : anchors.pop();
  const select = new Map();

  // marshal inputs to select in desired order
  table.columnNames().forEach(name => {
    // check if we should assign the current column
    const assign = !columns.has(name);

    // at anchor column, insert relocated columns
    if (name === anchor) {
      if (aft && assign) select.set(name, name);
      for (const [key, value] of columns) {
        select.set(key, value);
      }
      if (aft) return; // exit if current column has been handled
    }

    if (assign) select.set(name, name);
  });

  return extension_engine_select(table, select);
}
;// ../../node_modules/arquero/src/util/concat.js
/* harmony default export */ function extension_concat(list, fn = (x => x), delim = '') {
  const n = list.length;
  if (!n) return '';

  let s = fn(list[0], 0);
  for (let i = 1; i < n; ++i) {
    s += delim + fn(list[i], i);
  }

  return s;
}
;// ../../node_modules/arquero/src/util/ascending.js
/* harmony default export */ function extension_ascending(a, b) {
  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
}
;// ../../node_modules/arquero/src/util/min.js


/* harmony default export */ function extension_min(values, start = 0, stop = values.length) {
  let min = stop ? values[start++] : extension_util_null;

  for (let i = start; i < stop; ++i) {
    if (min > values[i]) {
      min = values[i];
    }
  }

  return min;
}
;// ../../node_modules/arquero/src/util/max.js


/* harmony default export */ function extension_max(values, start = 0, stop = values.length) {
  let max = stop ? values[start++] : extension_util_null;

  for (let i = start; i < stop; ++i) {
    if (max < values[i]) {
      max = values[i];
    }
  }

  return max;
}
;// ../../node_modules/arquero/src/util/to-numeric.js


/* harmony default export */ function extension_to_numeric(value) {
  return extension_is_bigint(value) ? value : +value;
}
;// ../../node_modules/arquero/src/util/quantile.js




function extension_quantile(values, p) {
  const n = values.length;

  if (!n) return extension_util_null;
  if ((p = +p) <= 0 || n < 2) return extension_to_numeric(values[0]);
  if (p >= 1) return extension_to_numeric(values[n - 1]);

  const i = (n - 1) * p;
  const i0 = Math.floor(i);
  const v0 = extension_to_numeric(values[i0]);
  return extension_is_bigint(v0)
    ? v0
    : v0 + (extension_to_numeric(values[i0 + 1]) - v0) * (i - i0);
}
;// ../../node_modules/arquero/src/util/value-list.js





class extension_ValueList {
  constructor(values) {
    this._values = values || [];
    this._sorted = null;
    this._start = 0;
  }

  values(copy) {
    if (this._start) {
      this._values = this._values.slice(this._start);
      this._start = 0;
    }
    return copy
      ? this._values.slice()
      : this._values;
  }

  add(value) {
    this._values.push(value);
    this._sorted = null;
  }

  rem() {
    this._start += 1;
    this._sorted = null;
  }

  min() {
    return this._sorted && this._sorted.length
      ? this._sorted[0]
      : extension_min(this._values, this._start);
  }

  max() {
    return this._sorted && this._sorted.length
      ? this._sorted[this._sorted.length - 1]
      : extension_max(this._values, this._start);
  }

  quantile(p) {
    if (!this._sorted) {
      this._sorted = this.values(true);
      this._sorted.sort(extension_ascending);
    }
    return extension_quantile(this._sorted, p);
  }
}
;// ../../node_modules/arquero/src/engine/reduce/field-reducer.js








const extension_field_reducer_update = (ops, args, fn) => extension_unroll(
  args,
  '{' + extension_concat(ops, (_, i) => `_${i}.${fn}(${args});`) + '}',
  ops
);

/* harmony default export */ function extension_field_reducer(oplist, stream) {
  const { ops, output } = extension_expand(oplist, stream);
  const fields = oplist[0].fields;
  const n = fields.length;
  const cls = n === 0 ? extension_FieldReducer
    : n === 1 ? extension_Field1Reducer
    : n === 2 ? extension_Field2Reducer
    : extension_util_error('Unsupported field count: ' + n);
  return new cls(fields, ops, output, stream);
}

function extension_expand(oplist, stream) {
  const has = {};
  const ops = [];

  function add(name, params = []) {
    // check key
    const key = name + ':' + params;
    if (has[key]) return has[key];

    // get op instance
    const def = extension_getAggregate(name);
    const op = def.create(...params);

    // add required dependencies
    if (stream < 0 && def.stream) {
      def.stream.forEach(name => add(name, []));
    }
    if (def.req) {
      def.req.forEach(name => add(name, []));
    }

    // update state
    has[key] = op;
    ops.push(op);

    return op;
  }

  const output = oplist.map(item => {
    const op = add(item.name, item.params);
    op.output = item.id;
    return op;
  });

  return { ops, output };
}

class extension_FieldReducer extends extension_Reducer {
  constructor(fields, ops, outputs, stream) {
    super(outputs);
    this._op = ops;
    this._fields = fields;
    this._stream = !!stream;
  }

  init() {
    const state = { count: 0, valid: 0, stream: this._stream };
    this._op.forEach(op => op.init(state));

    // value list requested
    if (state.values) {
      state.list = new extension_ValueList();
    }

    return state;
  }

  write(state, values, index) {
    const op = this._outputs;
    const n = op.length;
    for (let i = 0; i < n; ++i) {
      values[op[i].output][index] = op[i].value(state);
    }
    return 1;
  }

  _add() {
  }

  _rem() {
  }

  add(state) {
    ++state.count;
  }

  rem(state) {
    --state.count;
  }
}

class extension_Field1Reducer extends extension_FieldReducer {
  constructor(fields, ops, outputs, stream) {
    super(fields, ops, outputs, stream);

    // unroll op invocations for performance
    const args = ['state', 'v1', 'v2'];
    this._add = extension_field_reducer_update(ops, args, 'add');
    this._rem = extension_field_reducer_update(ops, args, 'rem');
  }

  add(state, row, data) {
    const value = this._fields[0](row, data);
    ++state.count;
    if (extension_is_valid(value)) {
      ++state.valid;
      if (state.list) state.list.add(value);
      this._add(state, value);
    }
  }

  rem(state, row, data) {
    const value = this._fields[0](row, data);
    --state.count;
    if (extension_is_valid(value)) {
      --state.valid;
      if (state.list) state.list.rem();
      this._rem(state, value);
    }
  }
}

class extension_Field2Reducer extends extension_FieldReducer {
  constructor(fields, ops, outputs, stream) {
    super(fields, ops, outputs, stream);

    // unroll op invocations for performance
    const args = ['state', 'v1', 'v2'];
    this._add = extension_field_reducer_update(ops, args, 'add');
    this._rem = extension_field_reducer_update(ops, args, 'rem');
  }

  add(state, row, data) {
    const value1 = this._fields[0](row, data);
    const value2 = this._fields[1](row, data);
    ++state.count;
    if (extension_is_valid(value1) && extension_is_valid(value2)) {
      ++state.valid;
      if (state.list) state.list.add([value1, value2]);
      this._add(state, value1, value2);
    }
  }

  rem(state, row, data) {
    const value1 = this._fields[0](row, data);
    const value2 = this._fields[1](row, data);
    --state.count;
    if (extension_is_valid(value1) && extension_is_valid(value2)) {
      --state.valid;
      if (state.list) state.list.rem();
      this._rem(state, value1, value2);
    }
  }
}
;// ../../node_modules/arquero/src/engine/reduce/util.js



function extension_aggregateGet(table, ops, get) {
  if (ops.length) {
    const data = table.data();
    const { keys } = table.groups() || {};
    const result = extension_aggregate(table, ops);
    const op = keys
      ? (name, row) => result[name][keys[row]]
      : name => result[name][0];
    get = get.map(f => row => f(row, data, op));
  }

  return get;
}

function extension_aggregate(table, ops, result) {
  if (!ops.length) return result; // early exit

  // instantiate aggregators and result store
  const aggrs = extension_reducers(ops);
  const groups = table.groups();
  const size = groups ? groups.size : 1;
  result = result || extension_util_repeat(ops.length, () => Array(size));

  // compute aggregates, extract results
  if (size > 1) {
    aggrs.forEach(aggr => {
      const cells = extension_reduceGroups(table, aggr, groups);
      for (let i = 0; i < size; ++i) {
        aggr.write(cells[i], result, i);
      }
    });
  } else {
    aggrs.forEach(aggr => {
      const cell = extension_reduceFlat(table, aggr);
      aggr.write(cell, result, 0);
    });
  }

  return result;
}

function extension_reducers(ops, stream) {
  const aggrs = [];
  const fields = {};

  // group operators by field inputs
  for (const op of ops) {
    const key = op.fields.map(f => f + '').join(',');
    (fields[key] || (fields[key] = [])).push(op);
  }

  // generate a field reducer for each field
  for (const key in fields) {
    aggrs.push(extension_field_reducer(fields[key], stream));
  }

  return aggrs;
}

function extension_reduceFlat(table, reducer) {
  // initialize aggregation cell
  const cell = reducer.init();

  // compute aggregate values
  // inline the following for performance:
  // table.scan((row, data) => reducer.add(cell, row, data));
  const n = table.totalRows();
  const data = table.data();
  const bits = table.mask();

  if (table.isOrdered()) {
    const idx = table.indices();
    for (let i = 0; i < n; ++i) {
      reducer.add(cell, idx[i], data);
    }
  } else if (bits) {
    for (let i = bits.next(0); i >= 0; i = bits.next(i + 1)) {
      reducer.add(cell, i, data);
    }
  } else {
    for (let i = 0; i < n; ++i) {
      reducer.add(cell, i, data);
    }
  }

  return cell;
}

function extension_reduceGroups(table, reducer, groups) {
  const { keys, size } = groups;

  // initialize aggregation cells
  const cells = extension_util_repeat(size, () => reducer.init());

  // compute aggregate values
  // inline the following for performance:
  // table.scan((row, data) => reducer.add(cells[keys[row]], row, data));
  const data = table.data();

  if (table.isOrdered()) {
    const idx = table.indices();
    const m = idx.length;
    for (let i = 0; i < m; ++i) {
      const row = idx[i];
      reducer.add(cells[keys[row]], row, data);
    }
  } else if (table.isFiltered()) {
    const bits = table.mask();
    for (let i = bits.next(0); i >= 0; i = bits.next(i + 1)) {
      reducer.add(cells[keys[i]], i, data);
    }
  } else {
    const n = table.totalRows();
    for (let i = 0; i < n; ++i) {
      reducer.add(cells[keys[i]], i, data);
    }
  }

  return cells;
}

function extension_groupOutput(cols, groups) {
  const { get, names, rows, size } = groups;

  // write group values to output columns
  const m = names.length;
  for (let j = 0; j < m; ++j) {
    const col = cols.add(names[j], Array(size));
    const val = get[j];
    for (let i = 0; i < size; ++i) {
      col[i] = val(rows[i]);
    }
  }
}
;// ../../node_modules/arquero/src/util/bisector.js
/* harmony default export */ function extension_bisector(compare) {
  return {
    left(a, x, lo, hi) {
      if (lo == null) lo = 0;
      if (hi == null) hi = a.length;
      while (lo < hi) {
        const mid = lo + hi >>> 1;
        if (compare(a[mid], x) < 0) lo = mid + 1;
        else hi = mid;
      }
      return lo;
    },
    right(a, x, lo, hi) {
      if (lo == null) lo = 0;
      if (hi == null) hi = a.length;
      while (lo < hi) {
        const mid = lo + hi >>> 1;
        if (compare(a[mid], x) > 0) hi = mid;
        else lo = mid + 1;
      }
      return lo;
    }
  };
}

;// ../../node_modules/arquero/src/engine/window/window-state.js





const extension_bisect = extension_bisector(extension_ascending);

/* harmony default export */ function extension_window_state(data, frame, adjust, ops, aggrs) {
  let rows, peer, cells, result, key;
  const isPeer = index => peer[index - 1] === peer[index];
  const numOps = ops.length;
  const numAgg = aggrs.length;

  const evaluate = ops.length
    ? extension_unroll(
        ['w', 'r', 'k'],
        '{' + extension_concat(ops, (_, i) => `r[_${i}.id][k]=_${i}.value(w,_${i}.get);`) + '}',
        ops
      )
    : () => {};

  const w = {
    i0: 0,
    i1: 0,
    index: 0,
    size: 0,
    peer: isPeer,

    init(partition, peers, results, group) {
      w.index = w.i0 = w.i1 = 0;
      w.size = peers.length;
      rows = partition;
      peer = peers;
      result = results;
      key = group;

      // initialize aggregates
      cells = aggrs ? aggrs.map(aggr => aggr.init()) : null;

      // initialize window ops
      for (let i = 0; i < numOps; ++i) {
        ops[i].init();
      }

      return w;
    },

    value(index, get) {
      return get(rows[index], data);
    },

    step(idx) {
      const [f0, f1] = frame;
      const n = w.size;
      const p0 = w.i0;
      const p1 = w.i1;

      w.i0 = f0 != null ? Math.max(0, idx - Math.abs(f0)) : 0;
      w.i1 = f1 != null ? Math.min(n, idx + Math.abs(f1) + 1) : n;
      w.index = idx;

      if (adjust) {
        if (w.i0 > 0 && isPeer(w.i0)) {
          w.i0 = extension_bisect.left(peer, peer[w.i0]);
        }
        if (w.i1 < n && isPeer(w.i1)) {
          w.i1 = extension_bisect.right(peer, peer[w.i1 - 1]);
        }
      }

      // evaluate aggregates
      for (let i = 0; i < numAgg; ++i) {
        const aggr = aggrs[i];
        const cell = cells[i];
        for (let j = p0; j < w.i0; ++j) {
          aggr.rem(cell, rows[j], data);
        }
        for (let j = p1; j < w.i1; ++j) {
          aggr.add(cell, rows[j], data);
        }
        aggr.write(cell, result, key);
      }

      // evaluate window ops
      evaluate(w, result, key);

      return result;
    }
  };

  return w;
}
;// ../../node_modules/arquero/src/engine/window/window.js






const extension_frameValue = op =>
  (op.frame || [null, null]).map(v => Number.isFinite(v) ? Math.abs(v) : null);

const extension_peersValue = op => !!op.peers;

function extension_windowOp(spec) {
  const { id, name, fields = [], params = [] } = spec;
  const op = extension_getWindow(name).create(...params);
  if (fields.length) op.get = fields[0];
  op.id = id;
  return op;
}

function extension_window_window(table, cols, exprs, result = {}, ops) {
  // instantiate window states
  const data = table.data();
  const states = extension_windowStates(ops, data);
  const nstate = states.length;

  const write = extension_unroll(
    ['r', 'd', 'op'],
    '{' + extension_concat(cols, (_, i) => `_${i}[r] = $${i}(r, d, op);`) + '}',
    cols, exprs
  );

  // scan each ordered partition
  table.partitions().forEach((rows, key) => {
    const size = rows.length;
    const peers = extension_windowPeers(table, rows);

    // initialize window states
    for (let i = 0; i < nstate; ++i) {
      states[i].init(rows, peers, result, key);
    }

    // calculate window values per-row
    const op = id => result[id][key];
    for (let index = 0; index < size; ++index) {
      // advance window frame, updates result object
      for (let i = 0; i < nstate; ++i) {
        states[i].step(index);
      }
      write(rows[index], data, op);
    }
  });
}

function extension_windowStates(ops, data) {
  const map = {};

  // group operations by window frame parameters
  ops.forEach(op => {
    const frame = extension_frameValue(op);
    const peers = extension_peersValue(op);
    const key = `${frame},${peers}`;
    const { aggOps, winOps } = map[key] || (map[key] = {
      frame,
      peers,
      aggOps: [],
      winOps: []
    });
    extension_hasAggregate(op.name)
      ? aggOps.push(op)
      : winOps.push(extension_windowOp(op));
  });

  return Object.values(map).map(_ => extension_window_state(
    data, _.frame, _.peers, _.winOps,
    extension_reducers(_.aggOps, _.frame[0] != null ? -1 : 1)
  ));
}

function extension_windowPeers(table, rows) {
  if (table.isOrdered()) {
    // generate peer ids for sort equality checking
    const compare = table.comparator();
    const data = table.data();
    const nrows = rows.length;
    const peers = new Uint32Array(nrows);
    for (let i = 1, index = 0; i < nrows; ++i) {
      peers[i] = compare(rows[i - 1], rows[i], data) ? ++index : index;
    }
    return peers;
  } else {
    // no sort, no peers: reuse row indices as peer ids
    return rows;
  }
}
;// ../../node_modules/arquero/src/engine/derive.js






function extension_isWindowed(op) {
  return extension_hasWindow(op.name) ||
    op.frame && (
      Number.isFinite(op.frame[0]) ||
      Number.isFinite(op.frame[1])
    );
}

/* harmony default export */ function extension_derive(table, { names, exprs, ops }, options = {}) {
  // instantiate output data
  const total = table.totalRows();
  const cols = extension_column_set(options.drop ? null : table);
  const data = names.map(name => cols.add(name, Array(total)));

  // analyze operations, compute non-windowed aggregates
  const [ aggOps, winOps ] = extension_segmentOps(ops);

  const size = table.isGrouped() ? table.groups().size : 1;
  const result = extension_aggregate(
    table, aggOps,
    extension_util_repeat(ops.length, () => Array(size))
  );

  // perform table scans to generate output values
  winOps.length
    ? extension_window_window(table, data, exprs, result, winOps)
    : extension_output(table, data, exprs, result);

  return table.create(cols);
}

function extension_segmentOps(ops) {
  const aggOps = [];
  const winOps = [];
  const n = ops.length;

  for (let i = 0; i < n; ++i) {
    const op = ops[i];
    op.id = i;
    (extension_isWindowed(op) ? winOps : aggOps).push(op);
  }

  return [aggOps, winOps];
}

function extension_output(table, cols, exprs, result) {
  const bits = table.mask();
  const data = table.data();
  const { keys } = table.groups() || {};
  const op = keys
    ? (id, row) => result[id][keys[row]]
    : id => result[id][0];

  const m = cols.length;
  for (let j = 0; j < m; ++j) {
    const get = exprs[j];
    const col = cols[j];

    // inline the following for performance:
    // table.scan((i, data) => col[i] = get(i, data, op));
    if (bits) {
      for (let i = bits.next(0); i >= 0; i = bits.next(i + 1)) {
        col[i] = get(i, data, op);
      }
    } else {
      const n = table.totalRows();
      for (let i = 0; i < n; ++i) {
        col[i] = get(i, data, op);
      }
    }
  }
}
;// ../../node_modules/arquero/src/verbs/derive.js




/* harmony default export */ function extension_verbs_derive(table, values, options = {}) {
  const dt = extension_derive(table, extension_expression_parse(values, { table }), options);

  return options.drop || (options.before == null && options.after == null)
    ? dt
    : extension_relocate(dt,
        Object.keys(values).filter(name => !table.column(name)),
        options
      );
}
;// ../../node_modules/arquero/src/verbs/except.js
/* harmony default export */ function extension_except(table, others) {
  if (others.length === 0) return table;
  const names = table.columnNames();
  return others.reduce((a, b) => a.antijoin(b.select(names)), table).dedupe();
}
;// ../../node_modules/arquero/src/engine/filter.js


/* harmony default export */ function extension_engine_filter(table, predicate) {
  const n = table.totalRows();
  const bits = table.mask();
  const data = table.data();
  const filter = new extension_BitSet(n);

  // inline the following for performance:
  // table.scan((row, data) => { if (predicate(row, data)) filter.set(row); });
  if (bits) {
    for (let i = bits.next(0); i >= 0; i = bits.next(i + 1)) {
      if (predicate(i, data)) filter.set(i);
    }
  } else {
    for (let i = 0; i < n; ++i) {
      if (predicate(i, data)) filter.set(i);
    }
  }

  return table.create({ filter });
}
;// ../../node_modules/arquero/src/verbs/filter.js




/* harmony default export */ function extension_verbs_filter(table, criteria) {
  const test = extension_expression_parse({ p: criteria }, { table });
  let predicate = test.exprs[0];
  if (test.ops.length) {
    const { data } = extension_derive(table, test, { drop: true }).column('p');
    predicate = row => data[row];
  }
  return extension_engine_filter(table, predicate);
}
;// ../../node_modules/arquero/src/engine/unroll.js




/* harmony default export */ function extension_engine_unroll(table, { names = [], exprs = [], ops = [] }, options = {}) {
  if (!names.length) return table;

  const limit = options.limit > 0 ? +options.limit : Infinity;
  const index = options.index
    ? options.index === true ? 'index' : options.index + ''
    : null;
  const drop = new Set(options.drop);
  const get = extension_aggregateGet(table, ops, exprs);

  // initialize output columns
  const cols = extension_column_set();
  const nset = new Set(names);
  const priors = [];
  const copies = [];
  const unroll = [];

  // original and copied columns
  table.columnNames().forEach(name => {
    if (!drop.has(name)) {
      const col = cols.add(name, []);
      if (!nset.has(name)) {
        priors.push(table.column(name));
        copies.push(col);
      }
    }
  });

  // unrolled output columns
  names.forEach(name => {
    if (!drop.has(name)) {
      if (!cols.has(name)) cols.add(name, []);
      unroll.push(cols.data[name]);
    }
  });

  // index column, if requested
  const icol = index ? cols.add(index, []) : null;

  let start = 0;
  const m = priors.length;
  const n = unroll.length;

  const copy = (row, maxlen) => {
    for (let i = 0; i < m; ++i) {
      copies[i].length = start + maxlen;
      copies[i].fill(priors[i].get(row), start, start + maxlen);
    }
  };

  const indices = icol
    ? (row, maxlen) => {
        for (let i = 0; i < maxlen; ++i) {
          icol[row + i] = i;
        }
      }
    : () => {};

  if (n === 1) {
    // optimize common case of one array-valued column
    const fn = get[0];
    const col = unroll[0];

    table.scan((row, data) => {
      // extract array data
      const array = extension_to_array(fn(row, data));
      const maxlen = Math.min(array.length, limit);

      // copy original table data
      copy(row, maxlen);

      // copy unrolled array data
      for (let j = 0; j < maxlen; ++j) {
        col[start + j] = array[j];
      }

      // fill in array indices
      indices(start, maxlen);

      start += maxlen;
    });
  } else {
    table.scan((row, data) => {
      let maxlen = 0;

      // extract parallel array data
      const arrays = get.map(fn => {
        const value = extension_to_array(fn(row, data));
        maxlen = Math.min(Math.max(maxlen, value.length), limit);
        return value;
      });

      // copy original table data
      copy(row, maxlen);

      // copy unrolled array data
      for (let i = 0; i < n; ++i) {
        const col = unroll[i];
        const arr = arrays[i];
        for (let j = 0; j < maxlen; ++j) {
          col[start + j] = arr[j];
        }
      }

      // fill in array indices
      indices(start, maxlen);

      start += maxlen;
    });
  }

  return table.create(cols.new());
}
;// ../../node_modules/arquero/src/engine/fold.js



/* harmony default export */ function extension_fold(table, { names = [], exprs = [], ops = [] }, options = {}) {
  if (names.length === 0) return table;

  const [k = 'key', v = 'value'] = options.as || [];
  const vals = extension_aggregateGet(table, ops, exprs);

  return extension_engine_unroll(
    table,
    {
      names: [k, v],
      exprs: [() => names, (row, data) => vals.map(fn => fn(row, data))]
    },
    { ...options, drop: names }
  );
}
;// ../../node_modules/arquero/src/verbs/util/parse.js











/* harmony default export */ function extension_util_parse(name, table, params, options = { window: false }) {
  const exprs = new Map();

  const marshal = param => {
    param = extension_is_number(param) ? table.columnName(param) : param;
    extension_is_string(param) ? exprs.set(param, extension_field(param))
      : extension_util_is_function(param) ? extension_resolve(table, param).forEach(marshal)
      : extension_is_object(param) ? extension_util_assign(exprs, param)
      : extension_util_error(`Invalid ${name} value: ${param+''}`);
  };

  extension_to_array(params).forEach(marshal);

  if (options.preparse) {
    options.preparse(exprs);
  }

  return extension_expression_parse(exprs, { table, ...options });
}
;// ../../node_modules/arquero/src/verbs/fold.js



/* harmony default export */ function extension_verbs_fold(table, values, options) {
  return extension_fold(table, extension_util_parse('fold', table, values), options);
}
;// ../../node_modules/arquero/src/engine/impute.js






/* harmony default export */ function extension_impute(table, values, keys, arrays) {
  const write = keys && keys.length;
  return extension_impute_impute(
    write ? extension_impute_expand(table, keys, arrays) : table,
    values,
    write
  );
}

function extension_impute_impute(table, { names, exprs, ops }, write) {
  const gets = extension_aggregateGet(table, ops, exprs);
  const cols = write ? null : extension_column_set(table);
  const rows = table.totalRows();

  names.forEach((name, i) => {
    const col = table.column(name);
    const out = write ? col.data : cols.add(name, Array(rows));
    const get = gets[i];

    table.scan(idx => {
      const v = col.get(idx);
      out[idx] = !extension_is_valid(v) ? get(idx) : v;
    });
  });

  return write ? table : table.create(cols);
}

function extension_impute_expand(table, keys, values) {
  const groups = table.groups();
  const data = table.data();

  // expansion keys and accessors
  const keyNames = (groups ? groups.names : []).concat(keys);
  const keyGet = (groups ? groups.get : [])
    .concat(keys.map(key => table.getter(key)));

  // build hash of existing rows
  const hash = new Set();
  const keyTable = extension_key_function(keyGet);
  table.scan((idx, data) => hash.add(keyTable(idx, data)));

  // initialize output table data
  const names = table.columnNames();
  const cols = extension_column_set();
  const out = names.map(name => cols.add(name, []));
  names.forEach((name, i) => {
    const old = data[name];
    const col = out[i];
    table.scan(row => col.push(old.get(row)));
  });

  // enumerate expanded value sets and augment output table
  const keyEnum = extension_key_function(keyGet.map((k, i) => a => a[i]));
  const set = extension_unroll(
    'v',
    '{' + out.map((_, i) => `_${i}.push(v[$${i}]);`).join('') + '}',
    out, names.map(name => keyNames.indexOf(name))
  );

  if (groups) {
    let row = groups.keys.length;
    const prod = values.reduce((p, a) => p * a.length, groups.size);
    const keys = new Uint32Array(prod + (row - hash.size));
    keys.set(groups.keys);
    extension_enumerate(groups, values, (vec, idx) => {
      if (!hash.has(keyEnum(vec))) {
        set(vec);
        keys[row++] = idx[0];
      }
    });
    cols.groupby({ ...groups, keys });
  } else {
    extension_enumerate(groups, values, vec => {
      if (!hash.has(keyEnum(vec))) set(vec);
    });
  }

  return table.create(cols.new());
}

function extension_enumerate(groups, values, callback) {
  const offset = groups ? groups.get.length : 0;
  const pad = groups ? 1 : 0;
  const len = pad + values.length;
  const lens = new Int32Array(len);
  const idxs = new Int32Array(len);
  const set = [];

  if (groups) {
    const { get, rows, size } = groups;
    lens[0] = size;
    set.push((vec, idx) => {
      const row = rows[idx];
      for (let i = 0; i < offset; ++i) {
        vec[i] = get[i](row);
      }
    });
  }

  values.forEach((a, i) => {
    const j = i + offset;
    lens[i + pad] = a.length;
    set.push((vec, idx) => vec[j] = a[idx]);
  });

  const vec = Array(offset + values.length);

  // initialize value vector
  for (let i = 0; i < len; ++i) {
    set[i](vec, 0);
  }
  callback(vec, idxs);

  // enumerate all combinations of values
  for (let i = len - 1; i >= 0;) {
    const idx = ++idxs[i];
    if (idx < lens[i]) {
      set[i](vec, idx);
      callback(vec, idxs);
      i = len - 1;
    } else {
      idxs[i] = 0;
      set[i](vec, 0);
      --i;
    }
  }
}
;// ../../node_modules/arquero/src/engine/rollup.js



/* harmony default export */ function extension_rollup(table, { names, exprs, ops }) {
  // output data
  const cols = extension_column_set();
  const groups = table.groups();

  // write groupby fields to output
  if (groups) extension_groupOutput(cols, groups);

  // compute and write aggregate output
  extension_rollup_output(names, exprs, groups, extension_aggregate(table, ops), cols);

  // return output table
  return table.create(cols.new());
}

function extension_rollup_output(names, exprs, groups, result = [], cols) {
  if (!exprs.length) return;
  const size = groups ? groups.size : 1;
  const op = (id, row) => result[id][row];
  const n = names.length;

  for (let i = 0; i < n; ++i) {
    const get = exprs[i];
    if (get.field != null) {
      // if expression is op only, use aggregates directly
      cols.add(names[i], result[get.field]);
    } else if (size > 1) {
      // if multiple groups, evaluate expression for each
      const col = cols.add(names[i], Array(size));
      for (let j = 0; j < size; ++j) {
        col[j] = get(j, null, op);
      }
    } else {
      // if only one group, no need to loop
      cols.add(names[i], [ get(0, null, op) ]);
    }
  }
}
;// ../../node_modules/arquero/src/verbs/impute.js








/* harmony default export */ function extension_verbs_impute(table, values, options = {}) {
  values = extension_expression_parse(values, { table });

  values.names.forEach(name =>
    table.column(name) ? 0 : extension_util_error(`Invalid impute column ${extension_to_string(name)}`)
  );

  if (options.expand) {
    const opt = { preparse: extension_preparse, aggronly: true };
    const params = extension_util_parse('impute', table, options.expand, opt);
    const result = extension_rollup(table.ungroup(), params);
    return extension_impute(
      table, values, params.names,
      params.names.map(name => result.get(name, 0))
    );
  } else {
    return extension_impute(table, values);
  }
}

// map direct field reference to "unique" aggregate
function extension_preparse(map) {
  map.forEach((value, key) =>
    value.field ? map.set(key, extension_array_agg_distinct(value + '')) : 0
  );
}
;// ../../node_modules/arquero/src/verbs/intersect.js
/* harmony default export */ function extension_intersect(table, others) {
  const names = table.columnNames();
  return others.length
    ? others.reduce((a, b) => a.semijoin(b.select(names)), table).dedupe()
    : table.reify([]);
}
;// ../../node_modules/arquero/src/engine/join/lookup.js
function extension_rowLookup(table, hash) {
  const lut = new Map();
  table.scan((row, data) => {
    const key = hash(row, data);
    if (key != null && key === key) {
      lut.set(key, row);
    }
  });
  return lut;
}

function extension_indexLookup(idx, data, hash) {
  const lut = new Map();
  const n = idx.length;
  for (let i = 0; i < n; ++i) {
    const row = idx[i];
    const key = hash(row, data);
    if (key != null && key === key) {
      lut.has(key)
        ? lut.get(key).push(i)
        : lut.set(key, [i]);
    }
  }
  return lut;
}
;// ../../node_modules/arquero/src/engine/join.js






function extension_emitter(columns, getters) {
  const args = ['i', 'a', 'j', 'b'];
  return extension_unroll(
    args,
    '{' + extension_concat(columns, (_, i) => `_${i}.push($${i}(${args}));`) + '}',
    columns, getters
  );
}

/* harmony default export */ function extension_join(tableL, tableR, predicate, { names, exprs }, options = {}) {
  // initialize data for left table
  const dataL = tableL.data();
  const idxL = tableL.indices(false);
  const nL = idxL.length;
  const hitL = new Int32Array(nL);

  // initialize data for right table
  const dataR = tableR.data();
  const idxR = tableR.indices(false);
  const nR = idxR.length;
  const hitR = new Int32Array(nR);

  // initialize output data
  const ncols = names.length;
  const cols = extension_column_set();
  const columns = Array(ncols);
  const getters = Array(ncols);
  for (let i = 0; i < names.length; ++i) {
    columns[i] = cols.add(names[i], []);
    getters[i] = exprs[i];
  }
  const emit = extension_emitter(columns, getters);

  // perform join
  const join = extension_is_array(predicate) ? extension_hashJoin : extension_loopJoin;
  join(emit, predicate, dataL, dataR, idxL, idxR, hitL, hitR, nL, nR);

  if (options.left) {
    for (let i = 0; i < nL; ++i) {
      if (!hitL[i]) {
        emit(idxL[i], dataL, -1, dataR);
      }
    }
  }

  if (options.right) {
    for (let j = 0; j < nR; ++j) {
      if (!hitR[j]) {
        emit(-1, dataL, idxR[j], dataR);
      }
    }
  }

  return tableL.create(cols.new());
}

function extension_loopJoin(emit, predicate, dataL, dataR, idxL, idxR, hitL, hitR, nL, nR) {
  // perform nested-loops join
  for (let i = 0; i < nL; ++i) {
    const rowL = idxL[i];
    for (let j = 0; j < nR; ++j) {
      const rowR = idxR[j];
      if (predicate(rowL, dataL, rowR, dataR)) {
        emit(rowL, dataL, rowR, dataR);
        hitL[i] = 1;
        hitR[j] = 1;
      }
    }
  }
}

function extension_hashJoin(emit, [keyL, keyR], dataL, dataR, idxL, idxR, hitL, hitR, nL, nR) {
  // determine which table to hash
  let dataScan, keyScan, hitScan, idxScan;
  let dataHash, keyHash, hitHash, idxHash;
  let emitScan = emit;
  if (nL >= nR) {
    dataScan = dataL; keyScan = keyL; hitScan = hitL; idxScan = idxL;
    dataHash = dataR; keyHash = keyR; hitHash = hitR; idxHash = idxR;
  } else {
    dataScan = dataR; keyScan = keyR; hitScan = hitR; idxScan = idxR;
    dataHash = dataL; keyHash = keyL; hitHash = hitL; idxHash = idxL;
    emitScan = (i, a, j, b) => emit(j, b, i, a);
  }

  // build lookup table
  const lut = extension_indexLookup(idxHash, dataHash, keyHash);

  // scan other table
  const m = idxScan.length;
  for (let j = 0; j < m; ++j) {
    const rowScan = idxScan[j];
    const list = lut.get(keyScan(rowScan, dataScan));
    if (list) {
      const n = list.length;
      for (let k = 0; k < n; ++k) {
        const i = list[k];
        emitScan(rowScan, dataScan, idxHash[i], dataHash);
        hitHash[i] = 1;
      }
      hitScan[j] = 1;
    }
  }
}
;// ../../node_modules/arquero/src/verbs/util/parse-key.js










/* harmony default export */ function extension_parse_key(name, table, params) {
  const exprs = new Map();

  extension_to_array(params).forEach((param, i) => {
    param = extension_is_number(param) ? table.columnName(param) : param;
    extension_is_string(param) ? exprs.set(i, extension_field(param))
      : extension_util_is_function(param) || extension_is_object(param) && param.expr ? exprs.set(i, param)
      : extension_util_error(`Invalid ${name} key value: ${param+''}`);
  });

  const fn = extension_expression_parse(exprs, { table, aggregate: false, window: false });
  return extension_key_function(fn.exprs, true);
}
;// ../../node_modules/arquero/src/util/intersect.js
function extension_intersect_intersect(a, b) {
  const set = new Set(b);
  return a.filter(x => set.has(x));
}
;// ../../node_modules/arquero/src/verbs/util/join-keys.js






function extension_inferKeys(tableL, tableR, on) {
  if (!on) {
    // perform natural join if join condition not provided
    const isect = extension_intersect_intersect(tableL.columnNames(), tableR.columnNames());
    if (!isect.length) extension_util_error('Natural join requires shared column names.');
    on = [isect, isect];
  } else if (extension_is_string(on)) {
    on = [on, on];
  } else if (extension_is_array(on) && on.length === 1) {
    on = [on[0], on[0]];
  }

  return on;
}

function extension_keyPredicate(tableL, tableR, onL, onR) {
  if (onL.length !== onR.length) {
    extension_util_error('Mismatched number of join keys');
  }
  return [
    extension_parse_key('join', tableL, onL),
    extension_parse_key('join', tableR, onR)
  ];
}
;// ../../node_modules/arquero/src/verbs/join.js










const extension_OPT_L = { aggregate: false, window: false };
const extension_OPT_R = { ...extension_OPT_L, index: 1 };

/* harmony default export */ function extension_verbs_join(tableL, tableR, on, values, options = {}) {
  on = extension_inferKeys(tableL, tableR, on);
  const optParse = { join: [tableL, tableR] };
  let predicate;

  if (extension_is_array(on)) {
    const [onL, onR] = on.map(extension_to_array);
    predicate = extension_keyPredicate(tableL, tableR, onL, onR);

    if (!values) {
      // infer output columns, suppress duplicated key columns
      values = extension_inferValues(tableL, onL, onR, options);
    }
  } else {
    predicate = extension_expression_parse({ on }, optParse).exprs[0];

    if (!values) {
      // include all table columns if values not provided
      values = [extension_selection_all(), extension_selection_all()];
    }
  }

  return extension_join(
    tableL, tableR, predicate,
    extension_parseValues(tableL, tableR, values, optParse, options && options.suffix),
    options
  );
}

function extension_inferValues(tableL, onL, onR, options) {
  const isect = [];
  onL.forEach((s, i) => extension_is_string(s) && s === onR[i] ? isect.push(s) : 0);
  const vR = extension_not(isect);

  if (options.left && options.right) {
    // for full join, merge shared key columns together
    const shared = new Set(isect);
    return [
      tableL.columnNames().map(s => {
        const c = `[${extension_to_string(s)}]`;
        return shared.has(s)
          ? { [s]: `(a, b) => a${c} == null ? b${c} : a${c}` }
          : s;
      }),
      vR
    ];
  }

  return options.right ? [vR, extension_selection_all()] : [extension_selection_all(), vR];
}

function extension_parseValues(tableL, tableR, values, optParse, suffix = []) {
  if (extension_is_array(values)) {
    let vL, vR, vJ, n = values.length;
    vL = vR = vJ = { names: [], exprs: [] };

    if (n--) {
      vL = extension_util_parse('join', tableL, values[0], optParse);
    }
    if (n--) {
      vR = extension_util_parse('join', tableR, values[1], extension_OPT_R);
    }
    if (n--) {
      vJ = extension_expression_parse(values[2], optParse);
    }

    // handle name collisions
    const rename = new Set();
    const namesL = new Set(vL.names);
    vR.names.forEach(name => {
      if (namesL.has(name)) {
        rename.add(name);
      }
    });
    if (rename.size) {
      extension_rekey(vL.names, rename, suffix[0] || '_1');
      extension_rekey(vR.names, rename, suffix[1] || '_2');
    }

    return {
      names: vL.names.concat(vR.names, vJ.names),
      exprs: vL.exprs.concat(vR.exprs, vJ.exprs)
    };
  } else {
    return extension_expression_parse(values, optParse);
  }
}

function extension_rekey(names, rename, suffix) {
  names.forEach((name, i) => rename.has(name)
    ? (names[i] = name + suffix)
    : 0);
}
;// ../../node_modules/arquero/src/engine/join-filter.js




/* harmony default export */ function extension_join_filter(tableL, tableR, predicate, options = {}) {
  // calculate semi-join filter mask
  const filter = new extension_BitSet(tableL.totalRows());
  const join = extension_is_array(predicate) ? extension_hashSemiJoin : extension_loopSemiJoin;
  join(filter, tableL, tableR, predicate);

  // if anti-join, negate the filter
  if (options.anti) {
    filter.not().and(tableL.mask());
  }

  return tableL.create({ filter });
}

function extension_hashSemiJoin(filter, tableL, tableR, [keyL, keyR]) {
  // build lookup table
  const lut = extension_rowLookup(tableR, keyR);

  // scan table, update filter with matches
  tableL.scan((rowL, data) => {
    const rowR = lut.get(keyL(rowL, data));
    if (rowR >= 0) filter.set(rowL);
  });
}

function extension_loopSemiJoin(filter, tableL, tableR, predicate) {
  const nL = tableL.numRows();
  const nR = tableR.numRows();
  const dataL = tableL.data();
  const dataR = tableR.data();

  if (tableL.isFiltered() || tableR.isFiltered()) {
    // use indices as at least one table is filtered
    const idxL = tableL.indices(false);
    const idxR = tableR.indices(false);
    for (let i = 0; i < nL; ++i) {
      const rowL = idxL[i];
      for (let j = 0; j < nR; ++j) {
        if (predicate(rowL, dataL, idxR[j], dataR)) {
          filter.set(rowL);
          break;
        }
      }
    }
  } else {
    // no filters, enumerate row indices directly
    for (let i = 0; i < nL; ++i) {
      for (let j = 0; j < nR; ++j) {
        if (predicate(i, dataL, j, dataR)) {
          filter.set(i);
          break;
        }
      }
    }
  }
}

// export default function(tableL, tableR, predicate, options = {}) {
//   const filter = new BitSet(tableL.totalRows());
//   const nL = tableL.numRows();
//   const nR = tableR.numRows();
//   const dataL = tableL.data();
//   const dataR = tableR.data();

//   if (tableL.isFiltered() || tableR.isFiltered()) {
//     // use indices as at least one table is filtered
//     const idxL = tableL.indices(false);
//     const idxR = tableR.indices(false);
//     for (let i = 0; i < nL; ++i) {
//       const rowL = idxL[i];
//       for (let j = 0; j < nR; ++j) {
//         if (predicate(rowL, dataL, idxR[j], dataR)) {
//           filter.set(rowL);
//           break;
//         }
//       }
//     }
//   } else {
//     // no filters, enumerate row indices directly
//     for (let i = 0; i < nL; ++i) {
//       for (let j = 0; j < nR; ++j) {
//         if (predicate(i, dataL, j, dataR)) {
//           filter.set(i);
//           break;
//         }
//       }
//     }
//   }

//   // if anti-join, negate the filter
//   if (options.anti) {
//     filter.not().and(tableL.mask());
//   }

//   return tableL.create({ filter });
// }
;// ../../node_modules/arquero/src/verbs/join-filter.js






/* harmony default export */ function extension_verbs_join_filter(tableL, tableR, on, options) {
  on = extension_inferKeys(tableL, tableR, on);

  const predicate = extension_is_array(on)
    ? extension_keyPredicate(tableL, tableR, ...on.map(extension_to_array))
    : extension_expression_parse({ on }, { join: [tableL, tableR] }).exprs[0];

  return extension_join_filter(tableL, tableR, predicate, options);
}
;// ../../node_modules/arquero/src/engine/lookup.js







/* harmony default export */ function extension_lookup(tableL, tableR, [keyL, keyR], { names, exprs, ops }) {
  // instantiate output data
  const cols = extension_column_set(tableL);
  const total = tableL.totalRows();
  names.forEach(name => cols.add(name, Array(total).fill(extension_util_null)));

  // build lookup table
  const lut = extension_rowLookup(tableR, keyR);

  // generate setter function for lookup match
  const set = extension_unroll(
    ['lr', 'rr', 'data'],
    '{' + extension_concat(names, (_, i) => `_[${i}][lr] = $[${i}](rr, data);`) + '}',
    names.map(name => cols.data[name]),
    extension_aggregateGet(tableR, ops, exprs)
  );

  // find matching rows, set values on match
  const dataR = tableR.data();
  tableL.scan((lrow, data) => {
    const rrow = lut.get(keyL(lrow, data));
    if (rrow >= 0) set(lrow, rrow, dataR);
  });

  return tableL.create(cols);
}
;// ../../node_modules/arquero/src/verbs/lookup.js





/* harmony default export */ function extension_verbs_lookup(tableL, tableR, on, values) {
  on = extension_inferKeys(tableL, tableR, on);
  return extension_lookup(
    tableL,
    tableR,
    [ extension_parse_key('lookup', tableL, on[0]), extension_parse_key('lookup', tableR, on[1]) ],
    extension_util_parse('lookup', tableR, values)
  );
}
;// ../../node_modules/arquero/src/engine/pivot.js



const extension_opt = (value, defaultValue) => value != null ? value : defaultValue;

/* harmony default export */ function extension_pivot(table, on, values, options = {}) {
  const { keys, keyColumn } = extension_pivotKeys(table, on, options);
  const vsep = extension_opt(options.valueSeparator, '_');
  const namefn = values.names.length > 1
    ? (i, name) => name + vsep + keys[i]
    : i => keys[i];

  // perform separate aggregate operations for each key
  // if keys do not match, emit NaN so aggregate skips it
  // use custom toString method for proper field resolution
  const results = keys.map(
    k => extension_aggregate(table, values.ops.map(op => {
      const fields = op.fields.map(f => {
        const fn = (r, d) => k === keyColumn[r] ? f(r, d) : NaN;
        fn.toString = () => k + ':' + f + '';
        return fn;
      });
      return { ...op, fields };
    }))
  );

  return table.create(extension_pivot_output(values, namefn, table.groups(), results));
}

function extension_pivotKeys(table, on, options) {
  const limit = options.limit > 0 ? +options.limit : Infinity;
  const sort = extension_opt(options.sort, true);
  const ksep = extension_opt(options.keySeparator, '_');

  // construct key accessor function
  const get = extension_aggregateGet(table, on.ops, on.exprs);
  const key = get.length === 1
    ? get[0]
    : (row, data) => get.map(fn => fn(row, data)).join(ksep);

  // generate vector of per-row key values
  const kcol = Array(table.totalRows());
  table.scan((row, data) => kcol[row] = key(row, data));

  // collect unique key values
  const uniq = extension_aggregate(
    table.ungroup(),
    [ {
      id: 0,
      name: 'array_agg_distinct',
      fields: [(row => kcol[row])], params: []
    } ]
  )[0][0];

  // get ordered set of unique key values
  const keys = sort ? uniq.sort() : uniq;

  // return key values
  return {
    keys: Number.isFinite(limit) ? keys.slice(0, limit) : keys,
    keyColumn: kcol
  };
}

function extension_pivot_output({ names, exprs }, namefn, groups, results) {
  const size = groups ? groups.size : 1;
  const cols = extension_column_set();
  const m = results.length;
  const n = names.length;

  let result;
  const op = (id, row) => result[id][row];

  // write groupby fields to output
  if (groups) extension_groupOutput(cols, groups);

  // write pivot values to output
  for (let i = 0; i < n; ++i) {
    const get = exprs[i];
    if (get.field != null) {
      // if expression is op only, use aggregates directly
      for (let j = 0; j < m; ++j) {
        cols.add(namefn(j, names[i]), results[j][get.field]);
      }
    } else if (size > 1) {
      // if multiple groups, evaluate expression for each
      for (let j = 0; j < m; ++j) {
        result = results[j];
        const col = cols.add(namefn(j, names[i]), Array(size));
        for (let k = 0; k < size; ++k) {
          col[k] = get(k, null, op);
        }
      }
    } else {
      // if only one group, no need to loop
      for (let j = 0; j < m; ++j) {
        result = results[j];
        cols.add(namefn(j, names[i]), [ get(0, null, op) ]);
      }
    }
  }

  return cols.new();
}
;// ../../node_modules/arquero/src/verbs/pivot.js




// TODO: enforce aggregates only (no output changes) for values
/* harmony default export */ function extension_verbs_pivot(table, on, values, options) {
  return extension_pivot(
    table,
    extension_util_parse('fold', table, on),
    extension_util_parse('fold', table, values, { preparse: extension_pivot_preparse, aggronly: true }),
    options
  );
}

// map direct field reference to "any" aggregate
function extension_pivot_preparse(map) {
  map.forEach((value, key) =>
    value.field ? map.set(key, extension_any(value + '')) : 0
  );
}
;// ../../node_modules/arquero/src/verbs/rename.js



/* harmony default export */ function extension_rename(table, columns) {
  const map = new Map();
  table.columnNames(x => (map.set(x, x), 0));
  return extension_engine_select(table, extension_resolve(table, columns, map));
}
;// ../../node_modules/arquero/src/verbs/rollup.js



/* harmony default export */ function extension_verbs_rollup(table, values) {
  return extension_rollup(table, extension_expression_parse(values, { table, aggronly: true }));
}
;// ../../node_modules/arquero/src/util/sample.js




/* harmony default export */ function extension_sample(buffer, replace, index, weight) {
  return (
    replace
      ? (weight ? extension_sampleRW : extension_sampleRU)
      : (weight ? extension_sampleNW : extension_sampleNU)
  )(buffer.length, buffer, index, weight);
}

// uniform sampling with replacement
// uses straightforward uniform sampling
function extension_sampleRU(size, buffer, index) {
  const n = index.length;
  for (let i = 0; i < size; ++i) {
    buffer[i] = index[(n * extension_random()) | 0];
  }
  return buffer;
}

// weighted sampling with replacement
// uses binary search lookup against cumulative weight
function extension_sampleRW(size, buffer, index, weight) {
  const n = index.length;
  const w = new Float64Array(n);

  let sum = 0;
  for (let i = 0; i < n; ++i) {
    w[i] = (sum += weight(index[i]));
  }

  const bisect = extension_bisector(extension_ascending).right;
  for (let i = 0; i < size; ++i) {
    buffer[i] = index[bisect(w, sum * extension_random())];
  }
  return buffer;
}

// uniform sampling without replacement
// uses reservoir sampling to build out the sample
// https://en.wikipedia.org/wiki/Reservoir_sampling
function extension_sampleNU(size, buffer, index) {
  const n = index.length;
  if (size >= n) return index;

  for (let i = 0; i < size; ++i) {
    buffer[i] = index[i];
  }

  for (let i = size; i < n; ++i) {
    const j = i * extension_random();
    if (j < size) {
      buffer[j | 0] = index[i];
    }
  }

  return buffer;
}

// weighted sample without replacement
// uses method of Efraimidis and Spirakis
// TODO: could use min-heap to improve efficiency
function extension_sampleNW(size, buffer, index, weight) {
  const n = index.length;
  if (size >= n) return index;

  const w = new Float32Array(n);
  const k = new Uint32Array(n);
  for (let i = 0; i < n; ++i) {
    k[i] = i;
    w[i] = -Math.log(extension_random()) / weight(index[i]);
  }

  k.sort((a, b) => w[a] - w[b]);
  for (let i = 0; i < size; ++i) {
    buffer[i] = index[k[i]];
  }
  return buffer;
}
;// ../../node_modules/arquero/src/util/shuffle.js


/* harmony default export */ function extension_util_shuffle(array, lo = 0, hi = array.length) {
  let n = hi - (lo = +lo);

  while (n) {
    const i = extension_random() * n-- | 0;
    const v = array[n + lo];
    array[n + lo] = array[i + lo];
    array[i + lo] = v;
  }

  return array;
}
;// ../../node_modules/arquero/src/engine/sample.js



/* harmony default export */ function extension_engine_sample(table, size, weight, options = {}) {
  const { replace, shuffle } = options;
  const parts = table.partitions(false);

  let total = 0;
  size = parts.map((idx, group) => {
    let s = size(group);
    total += (s = (replace ? s : Math.min(idx.length, s)));
    return s;
  });

  const samples = new Uint32Array(total);
  let curr = 0;

  parts.forEach((idx, group) => {
    const sz = size[group];
    const buf = samples.subarray(curr, curr += sz);

    if (!replace && sz === idx.length) {
      // sample size === data size, no replacement
      // no need to sample, just copy indices
      buf.set(idx);
    } else {
      extension_sample(buf, replace, idx, weight);
    }
  });

  if (shuffle !== false && (parts.length > 1 || !replace)) {
    // sampling with replacement methods shuffle, so in
    // that case a single partition is already good to go
    extension_util_shuffle(samples);
  }

  return table.reify(samples);
}
;// ../../node_modules/arquero/src/verbs/sample.js







/* harmony default export */ function extension_verbs_sample(table, size, options = {}) {
  return extension_engine_sample(
    table,
    extension_parseSize(table, size),
    extension_parseWeight(table, options.weight),
    options
  );
}

const extension_get = col => row => col.get(row) || 0;

function extension_parseSize(table, size) {
  return extension_is_number(size)
    ? () => size
    : extension_get(extension_rollup(table, extension_expression_parse({ size }, { table })).column('size'));
}

function extension_parseWeight(table, w) {
  if (w == null) return null;
  w = extension_is_number(w) ? table.columnName(w) : w;
  return extension_get(
    extension_is_string(w)
      ? table.column(w)
      : extension_derive(table, extension_expression_parse({ w }, { table }), { drop: true }).column('w')
  );
}
;// ../../node_modules/arquero/src/verbs/select.js



/* harmony default export */ function extension_verbs_select(table, columns) {
  return extension_engine_select(table, extension_resolve(table, columns));
}
;// ../../node_modules/arquero/src/engine/spread.js





/* harmony default export */ function extension_engine_spread(table, { names, exprs, ops = [] }, options = {}) {
  if (names.length === 0) return table;

  // ignore 'as' if there are multiple field names
  const as = (names.length === 1 && options.as) || [];
  const drop = options.drop == null ? true : !!options.drop;
  const limit = options.limit == null
    ? as.length || Infinity
    : Math.max(1, +options.limit || 1);

  const get = extension_aggregateGet(table, ops, exprs);
  const cols = extension_column_set();
  const map = names.reduce((map, name, i) => map.set(name, i), new Map());

  const add = (index, name) => {
    const columns = extension_spread_spread(table, get[index], limit);
    const n = columns.length;
    for (let i = 0; i < n; ++i) {
      cols.add(as[i] || `${name}_${i + 1}`, columns[i]);
    }
  };

  table.columnNames().forEach(name => {
    if (map.has(name)) {
      if (!drop) cols.add(name, table.column(name));
      add(map.get(name), name);
      map.delete(name);
    } else {
      cols.add(name, table.column(name));
    }
  });

  map.forEach(add);

  return table.create(cols);
}

function extension_spread_spread(table, get, limit) {
  const nrows = table.totalRows();
  const columns = [];

  table.scan((row, data) => {
    const values = extension_to_array(get(row, data));
    const n = Math.min(values.length, limit);
    while (columns.length < n) {
      columns.push(Array(nrows).fill(extension_util_null));
    }
    for (let i = 0; i < n; ++i) {
      columns[i][row] = values[i];
    }
  });

  return columns;
}
;// ../../node_modules/arquero/src/verbs/spread.js



/* harmony default export */ function extension_verbs_spread(table, values, options) {
  return extension_engine_spread(table, extension_util_parse('spread', table, values), options);
}
;// ../../node_modules/arquero/src/verbs/union.js
/* harmony default export */ function extension_union(table, others) {
  return table.concat(others).dedupe();
}
;// ../../node_modules/arquero/src/verbs/unroll.js



/* harmony default export */ function extension_verbs_unroll(table, values, options) {
  return extension_engine_unroll(
    table,
    extension_util_parse('unroll', table, values),
    options && options.drop
      ? { ...options, drop: extension_util_parse('unroll', table, options.drop).names }
      : options
  );
}
;// ../../node_modules/arquero/src/engine/groupby.js



/* harmony default export */ function extension_groupby(table, exprs) {
  return table.create({
    groups: extension_createGroups(table, exprs)
  });
}

function extension_createGroups(table, { names = [], exprs = [], ops = [] }) {
  const n = names.length;
  if (n === 0) return null;

  // check for optimized path when grouping by a single field
  // use pre-calculated groups if available
  if (n === 1 && !table.isFiltered() && exprs[0].field) {
    const col = table.column(exprs[0].field);
    if (col.groups) return col.groups(names);
  }

  let get = extension_aggregateGet(table, ops, exprs);
  const getKey = extension_key_function(get);
  const nrows = table.totalRows();
  const keys = new Uint32Array(nrows);
  const index = {};
  const rows = [];

  // inline table scan for performance
  const data = table.data();
  const bits = table.mask();
  if (bits) {
    for (let i = bits.next(0); i >= 0; i = bits.next(i + 1)) {
      const key = getKey(i, data) + '';
      const val = index[key];
      keys[i] = val != null ? val : (index[key] = rows.push(i) - 1);
    }
  } else {
    for (let i = 0; i < nrows; ++i) {
      const key = getKey(i, data) + '';
      const val = index[key];
      keys[i] = val != null ? val : (index[key] = rows.push(i) - 1);
    }
  }

  if (!ops.length) {
    // capture data in closure, so no interaction with select
    get = get.map(f => row => f(row, data));
  }

  return { keys, get, names, rows, size: rows.length };
}
;// ../../node_modules/arquero/src/verbs/groupby.js



/* harmony default export */ function extension_verbs_groupby(table, values) {
  return extension_groupby(table, extension_util_parse('groupby', table, values));
}
;// ../../node_modules/arquero/src/engine/orderby.js
/* harmony default export */ function extension_orderby(table, comparator) {
  return table.create({ order: comparator });
}

;// ../../node_modules/arquero/src/expression/compare.js




// generate code to compare a single field
const extension_compare = (u, v, lt, gt) =>
  `((u = ${u}) < (v = ${v}) || u == null) && v != null ? ${lt}
    : (u > v || v == null) && u != null ? ${gt}
    : ((v = v instanceof Date ? +v : v), (u = u instanceof Date ? +u : u)) !== u && v === v ? ${lt}
    : v !== v && u === u ? ${gt} : `;

/* harmony default export */ function src_extension_compare(table, fields) {
  // parse expressions, generate code for both a and b values
  const names = [];
  const exprs = [];
  const fn = [];
  let keys = null, opA = '0', opB = '0';
  if (table.isGrouped()) {
    keys = table.groups().keys;
    opA = 'ka';
    opB = 'kb';
  }
  const { ops } = extension_expression_parse(fields, {
    table,
    value: (name, node) => {
      names.push(name);
      if (node.escape) {
        // if an escaped function, invoke it directly
        const f = i => `fn[${fn.length}](${i}, data)`;
        exprs.push([f('a'), f('b')]);
        fn.push(node.escape);
      } else {
        // generate code to extract values to compare
        exprs.push([
          extension_codegen(node, { index: 'a', op: opA }),
          extension_codegen(node, { index: 'b', op: opB })
        ]);
      }
    },
    window: false
  });

  // calculate aggregate values if needed
  const result = extension_aggregate(table, ops);
  const op = (id, row) => result[id][row];

  // generate comparison code for each field
  const n = names.length;
  let code = 'return (a, b) => {'
    + (op && table.isGrouped() ? 'const ka = keys[a], kb = keys[b];' : '')
    + 'let u, v; return ';
  for (let i = 0; i < n; ++i) {
    const o = fields.get(names[i]).desc ? -1 : 1;
    const [u, v] = exprs[i];
    code += extension_compare(u, v, -o, o);
  }
  code += '0;};';

  // instantiate and return comparator function
  return Function('op', 'keys', 'fn', 'data', code)(op, keys, fn, table.data());
}
;// ../../node_modules/arquero/src/verbs/orderby.js









/* harmony default export */ function extension_verbs_orderby(table, values) {
  return extension_orderby(table, extension_orderby_parseValues(table, values));
}

function extension_orderby_parseValues(table, params) {
  let index = -1;
  const exprs = new Map();
  const add = val => exprs.set(++index + '', val);

  params.forEach(param => {
    const expr = param.expr != null ? param.expr : param;

    if (extension_is_object(expr) && !extension_util_is_function(expr)) {
      for (const key in expr) add(expr[key]);
    } else {
      add(
        extension_is_number(expr) ? extension_field(param, table.columnName(expr))
          : extension_is_string(expr) ? extension_field(param)
          : extension_util_is_function(expr) ? param
          : extension_util_error(`Invalid orderby field: ${param+''}`)
      );
    }
  });

  return src_extension_compare(table, exprs);
}
;// ../../node_modules/arquero/src/engine/concat.js



/* harmony default export */ function extension_engine_concat(table, others) {
  const trows = table.numRows();
  const nrows = trows + others.reduce((n, t) => n + t.numRows(), 0);
  if (trows === nrows) return table;

  const tables = [table, ...others];
  const cols = extension_column_set();

  table.columnNames().forEach(name => {
    const arr = Array(nrows);
    let row = 0;
    tables.forEach(table => {
      const col = table.column(name) || { get: () => extension_util_null };
      table.scan(trow => arr[row++] = col.get(trow));
    });
    cols.add(name, arr);
  });

  return table.create(cols.new());
}
;// ../../node_modules/arquero/src/engine/reduce.js



/* harmony default export */ function extension_reduce(table, reducer) {
  const cols = extension_column_set();
  const groups = table.groups();

  // initialize groups
  const { get, names = [], rows, size = 1 } = groups || {};
  const counts = new Uint32Array(size + 1);
  names.forEach(name => cols.add(name, null));

  // compute reduced values
  const cells = groups
    ? extension_reduceGroups(table, reducer, groups)
    : [ extension_reduceFlat(table, reducer) ];

  // initialize output columns
  reducer.outputs().map(name => cols.add(name, []));

  // write reduced values to output columns
  const n = counts.length - 1;
  let len = 0;
  for (let i = 0; i < n; ++i) {
    len += counts[i + 1] = reducer.write(cells[i], cols.data, counts[i]);
  }

  // write group values to output columns
  if (groups) {
    const data = table.data();
    names.forEach((name, index) => {
      const column = cols.data[name] = Array(len);
      const getter = get[index];
      for (let i = 0, j = 0; i < size; ++i) {
        column.fill(getter(rows[i], data), j, j += counts[i + 1]);
      }
    });
  }

  return table.create(cols.new());
}
;// ../../node_modules/arquero/src/engine/ungroup.js
/* harmony default export */ function extension_ungroup(table) {
  return table.isGrouped()
    ? table.create({ groups: null })
    : table;
}
;// ../../node_modules/arquero/src/engine/unorder.js
/* harmony default export */ function extension_unorder(table) {
  return table.isOrdered()
    ? table.create({ order: null })
    : table;
}
;// ../../node_modules/arquero/src/verbs/index.js





























/* harmony default export */ const extension_verbs = ({
  __antijoin: (table, other, on) =>
    extension_verbs_join_filter(table, other, on, { anti: true }),
  __count: (table, options = {}) =>
    extension_verbs_rollup(table, { [options.as || 'count']: extension_count() }),
  __cross: (table, other, values, options) =>
    extension_verbs_join(table, other, () => true, values, {
      ...options, left: true, right: true
    }),
  __concat: extension_engine_concat,
  __dedupe: extension_dedupe,
  __derive: extension_verbs_derive,
  __except: extension_except,
  __filter: extension_verbs_filter,
  __fold: extension_verbs_fold,
  __impute: extension_verbs_impute,
  __intersect: extension_intersect,
  __join: extension_verbs_join,
  __lookup: extension_verbs_lookup,
  __pivot: extension_verbs_pivot,
  __relocate: extension_relocate,
  __rename: extension_rename,
  __rollup: extension_verbs_rollup,
  __sample: extension_verbs_sample,
  __select: extension_verbs_select,
  __semijoin: extension_verbs_join_filter,
  __spread: extension_verbs_spread,
  __union: extension_union,
  __unroll: extension_verbs_unroll,
  __groupby: extension_verbs_groupby,
  __orderby: extension_verbs_orderby,
  __ungroup: extension_ungroup,
  __unorder: extension_unorder,
  __reduce: extension_reduce
});
;// ../../node_modules/arquero/src/table/index.js



// Add verb implementations to ColumnTable prototype
Object.assign(extension_column_table_ColumnTable.prototype, extension_verbs);

/**
 * Create a new table for a set of named columns.
 * @param {object|Map} columns
 *  The set of named column arrays. Keys are column names.
 *  The enumeration order of the keys determines the column indices,
 *  unless the names parameter is specified.
 *  Values must be arrays (or array-like values) of identical length.
 * @param {string[]} [names] Ordered list of column names. If specified,
 *  this array determines the column indices. If not specified, the
 *  key enumeration order of the columns object is used.
 * @return {ColumnTable} the instantiated table
 * @example table({ colA: ['a', 'b', 'c'], colB: [3, 4, 5] })
 */
function extension_table_table(columns, names) {
  return ColumnTable.new(columns, names);
}

/**
 * Create a new table from an existing object, such as an array of
 * objects or a set of key-value pairs.
 * @param {object|Array|Map} values Data values to populate the table.
 *  If array-valued or iterable, imports rows for each non-null value,
 *  using the provided column names as keys for each row object. If no
 *  names are provided, the first non-null object's own keys are used.
 *  If object- or Map-valued, create columns for the keys and values.
 * @param {string[]} [names] Column names to include.
 *  For object or Map values, specifies the key and value column names.
 *  Otherwise, specifies the keys to look up on each row object.
 * @return {ColumnTable} the instantiated table.
 * @example from([ { colA: 1, colB: 2 }, { colA: 3, colB: 4 } ])
 */
function extension_table_from(values, names) {
  return ColumnTable.from(values, names);
}
;// ../../node_modules/arquero/src/format/load-url.js
 // eslint-disable-line no-unused-vars








/**
 * Options for file loading.
 * @typedef {object} LoadOptions
 * @property {'arrayBuffer'|'text'|'json'} [as='text'] A string indicating
 *  the data type of the file. One of 'arrayBuffer', 'json', or 'text'.
 * @property {(data: *, options?: object) => ColumnTable} [using] A function
 *  that accepts a data payload (e.g., string or buffer) and an options object
 *  as input and returns an Arquero table (such as fromCSV or fromJSON).
 * @property {object} [fetch] Options to pass to the HTTP fetch method
 *  when loading a URL.
 */

/**
 * Load data from a file and return a Promise for an Arquero table.
 * A specific format parser can be provided with the *using* option,
 * otherwise CSV format is assumed. The options to this method are
 * passed as the second argument to the format parser.
 * @param {string} url The URL to load.
 * @param {LoadOptions & object} options The loading and formatting options.
 * @return {Promise<ColumnTable>} A Promise for an Arquero table.
 * @example aq.load('data/table.csv')
 * @example aq.load('data/table.json', { using: aq.fromJSON })
 * @example aq.load('data/table.json', { using: aq.from })
 */
function extension_load(url, options = {}) {
  const parse = options.using || fromCSV;
  return fetch(url, options.fetch)
    .then(res => res[options.as || 'text']())
    .then(data => parse(data, options));
}

/**
 * Load an Arrow file from a URL and return a Promise for an Arquero table.
 * @param {string} url The URL to load.
 * @param {LoadOptions & import('./from-arrow').ArrowOptions} options Arrow format options.
 * @return {Promise<ColumnTable>} A Promise for an Arquero table.
 * @example aq.loadArrow('data/table.arrow')
 */
function extension_loadArrow(url, options) {
  return extension_load(url, { ...options, as: 'arrayBuffer', using: fromArrow });
}

/**
 * Load a CSV file from a URL and return a Promise for an Arquero table.
 * @param {string} url The URL to load.
 * @param {LoadOptions & import('./from-csv').CSVParseOptions} options CSV format options.
 * @return {Promise<ColumnTable>} A Promise for an Arquero table.
 * @example aq.loadCSV('data/table.csv')
 * @example aq.loadTSV('data/table.tsv', { delimiter: '\t' })
 */
function extension_loadCSV(url, options) {
  return extension_load(url, { ...options, as: 'text', using: fromCSV });
}

/**
 * Load a fixed width file from a URL and return a Promise for an Arquero table.
 * @param {string} url The URL to load.
 * @param {LoadOptions & import('./from-fixed').FixedParseOptions} options Fixed width format options.
 * @return {Promise<ColumnTable>} A Promise for an Arquero table.
 * @example aq.loadFixedWidth('data/table.txt', { names: ['name', 'city', state'], widths: [10, 20, 2] })
 */
 function extension_loadFixed(url, options) {
  return extension_load(url, { ...options, as: 'text', using: fromFixed });
}

/**
 * Load a JSON file from a URL and return a Promise for an Arquero table.
 * If the loaded JSON is array-valued, an array-of-objects format is assumed
 * and the aq.from method is used to construct the table. Otherwise, a
 * column object format is assumed and aq.fromJSON is applied.
 * @param {string} url The URL to load.
 * @param {LoadOptions & import('./from-json').JSONParseOptions} options JSON format options.
 * @return {Promise<ColumnTable>} A Promise for an Arquero table.
 * @example aq.loadJSON('data/table.json')
 */
function extension_loadJSON(url, options) {
  return extension_load(url, { ...options, as: 'json', using: extension_parseJSON });
}

function extension_parseJSON(data, options) {
  return isArray(data) ? from(data) : fromJSON(data, options);
}
;// ../../node_modules/arquero/src/helpers/bin.js
/**
 * Options for binning number values.
 * @typedef {object} BinOptions
 * @property {number} [maxbins] The maximum number of bins.
 * @property {number} [minstep] The minimum step size between bins.
 * @property {number} [step] The exact step size to use between bins.
 *  If specified, the maxbins and minstep options are ignored.
 * @property {boolean} [nice=true] Flag indicating if bins should
 *  snap to "nice" human-friendly values such as multiples of ten.
 * @property {number} [offset=0] Step offset for bin boundaries.
 *  The default floors to the lower bin boundary. A value of 1 snaps
 *  one step higher to the upper bin boundary, and so on.
 */

/**
 * Generate a table expression that performs uniform binning of
 * number values. The resulting string can be used as part of the
 * input to table transformation verbs.
 * @param {string} name The name of the column to bin.
 * @param {BinOptions} [options] Binning scheme options.
 * @return {string} A table expression string for binned values.
 * @example bin('colA', { maxbins: 20 })
 */
/* harmony default export */ function extension_helpers_bin(name, options = {}) {
  const field = `d[${JSON.stringify(name)}]`;
  const { maxbins, nice, minstep, step, offset } = options;
  const args = [maxbins, nice, minstep, step];

  let n = args.length;
  while (n && args[--n] == null) args.pop();
  const a = args.length ? ', ' + args.map(a => a + '').join(', ') : '';

  return `d => op.bin(${field}, ...op.bins(${field}${a}), ${offset || 0})`;
}
;// ../../node_modules/arquero/src/verbs/helpers/agg.js
 // eslint-disable-line no-unused-vars

/**
 * Convenience function for computing a single aggregate value for
 * a table. Equivalent to ungrouping a table, applying a rollup verb
 * for a single aggregate, and extracting the resulting value.
 * @param {Table} table A table instance.
 * @param {import('../../table/transformable').TableExpr} expr An
 *   aggregate table expression to evaluate.
 * @return {import('../../table/table').DataValue} The aggregate value.
 * @example agg(table, op.max('colA'))
 * @example agg(table, d => [op.min('colA'), op.max('colA')])
 */
function extension_agg(table, expr) {
  return table.ungroup().rollup({ _: expr }).get('_');
}
;// ../../node_modules/arquero/src/register.js













const extension_onIllegal = (name, type) =>
  error(`Illegal ${type} name: ${toString(name)}`);

const extension_onDefined = (name, type) =>
  error(`The ${type} ${toString(name)} is already defined. Use override option?`);

const extension_onReserve = (name, type) =>
  error(`The ${type} name ${toString(name)} is reserved and can not be overridden.`);

function extension_register_check(name, options, obj = ops, type = 'function') {
  if (!name) extension_onIllegal(name, type);
  if (!options.override && has(obj, name)) extension_onDefined(name, type);
}

// -- Op Functions --------------------------------------------------

function extension_verifyFunction(name, def, object, options) {
  return object[name] === def || extension_register_check(name, options);
}

/**
 * Register an aggregate or window operation.
 * @param {string} name The name of the operation
 * @param {AggregateDef|WindowDef} def The operation definition.
 * @param {object} object The registry object to add the definition to.
 * @param {RegisterOptions} [options] Registration options.
 */
function extension_addOp(name, def, object, options = {}) {
  if (extension_verifyFunction(name, def, object, options)) return;
  const [nf = 0, np = 0] = def.param;
  object[name] = def;
  ops[name] = (...params) => op(
    name,
    params.slice(0, nf),
    params.slice(nf, nf + np)
  );
}

/**
 * Register a custom aggregate function.
 * @param {string} name The name to use for the aggregate function.
 * @param {AggregateDef} def The aggregate operator definition.
 * @param {RegisterOptions} [options] Function registration options.
 * @throws If a function with the same name is already registered and
 *  the override option is not specified.
 */
function extension_addAggregateFunction(name, def, options) {
  extension_addOp(name, def, aggregateFunctions, options);
}

/**
 * Register a custom window function.
 * @param {string} name The name to use for the window function.
 * @param {WindowDef} def The window operator definition.
 * @param {RegisterOptions} [options] Function registration options.
 * @throws If a function with the same name is already registered and
 *  the override option is not specified.
 */
function extension_addWindowFunction(name, def, options) {
  extension_addOp(name, def, windowFunctions, options);
}

/**
 * Register a function for use within table expressions.
 * If only a single argument is provided, it will be assumed to be a
 * function and the system will try to extract its name.
 * @param {string} name The name to use for the function.
 * @param {Function} fn A standard JavaScript function.
 * @param {RegisterOptions} [options] Function registration options.
 * @throws If a function with the same name is already registered and
 *  the override option is not specified, or if no name is provided
 *  and the input function is anonymous.
 */
function extension_addFunction(name, fn, options = {}) {
  if (arguments.length === 1) {
    fn = name;
    name = fn.name;
    if (name === '' || name === 'anonymous') {
      error('Anonymous function provided, please include a name argument.');
    } else if (name === ROW_OBJECT) {
      extension_onReserve(ROW_OBJECT, 'function');
    }
  }
  if (extension_verifyFunction(name, fn, functions, options)) return;
  functions[name] = fn;
  ops[name] = fn;
}

// -- Table Methods and Verbs ---------------------------------------

const extension_proto = extension_column_table_ColumnTable.prototype;

/**
 * Reserved table/query methods that must not be overwritten.
 */
let extension_RESERVED;

function extension_addReserved(obj) {
  for (; obj; obj = Object.getPrototypeOf(obj)) {
    Object.getOwnPropertyNames(obj).forEach(name => extension_RESERVED[name] = 1);
  }
}

function extension_verifyTableMethod(name, fn, options) {
  const type = 'method';

  // exit early if duplicate re-assignment
  if (extension_proto[name] && extension_proto[name].fn === fn) return true;

  // initialize reserved properties to avoid overriding internals
  if (!extension_RESERVED) {
    extension_RESERVED = {};
    extension_addReserved(extension_proto);
    extension_addReserved(Query.prototype);
  }

  // perform name checks
  if (extension_RESERVED[name]) extension_onReserve(name, type);
  if ((name + '')[0] === '_') extension_onIllegal(name, type);
  extension_register_check(name, options, extension_proto, type);
}

/**
 * Register a new table method. A new method will be added to the column
 * table prototype. When invoked from a table, the registered method will
 * be invoked with the table as the first argument, followed by all the
 * provided arguments.
 * @param {string} name The name of the table method.
 * @param {Function} method The table method.
 * @param {RegisterOptions} options
 */
function extension_addTableMethod(name, method, options = {}) {
  if (extension_verifyTableMethod(name, method, options)) return;
  extension_proto[name] = function(...args) { return method(this, ...args); };
  extension_proto[name].fn = method;
}

/**
 * Register a new transformation verb.
 * @param {string} name The name of the verb.
 * @param {Function} method The verb implementation.
 * @param {ParamDef[]} params The verb parameter schema.
 * @param {RegisterOptions} options Function registration options.
 */
function extension_addVerb(name, method, params, options = {}) {
  // register table method first
  // if that doesn't throw, add serializable verb entry
  extension_addTableMethod(name, method, options);
  addQueryVerb(name, Verbs[name] = createVerb(name, params));
}

// -- Package Bundles -----------------------------------------------

const extension_PACKAGE = 'arquero_package';

/**
 * Add an extension package of functions, table methods, and/or verbs.
 * @param {Package|PackageBundle} bundle The package of extensions.
 * @throws If package validation fails.
 */
function extension_addPackage(bundle, options = {}) {
  const pkg = bundle && bundle[extension_PACKAGE] || bundle;
  const parts = {
    functions: [
      (name, def, opt) => extension_verifyFunction(name, def, functions, opt),
      extension_addFunction
    ],
    aggregateFunctions: [
      (name, def, opt) => extension_verifyFunction(name, def, aggregateFunctions, opt),
      extension_addAggregateFunction
    ],
    windowFunctions: [
      (name, def, opt) => extension_verifyFunction(name, def, windowFunctions, opt),
      extension_addWindowFunction
    ],
    tableMethods: [
      extension_verifyTableMethod,
      extension_addTableMethod
    ],
    verbs: [
      (name, obj, opt) => extension_verifyTableMethod(name, obj.method, opt),
      (name, obj, opt) => extension_addVerb(name, obj.method, obj.params, opt)
    ]
  };

  function scan(index) {
    for (const key in parts) {
      const part = parts[key];
      const p = pkg[key];
      for (const name in p) part[index](name, p[name], options);
    }
  }
  scan(0); // first validate package, throw if validation fails
  scan(1); // then add package content
}

/**
 * Aggregate function definition.
 * @typedef {import('./op/aggregate-functions').AggregateDef} AggregateDef
 */

/**
 * Window function definition.
 * @typedef {import('./op/window-functions').WindowDef} WindowDef
 */

/**
 * Verb parameter definition.
 * @typedef {import('./query/verb').ParamDef} ParamDef
 */

/**
 * Verb definition.
 * @typedef {object} VerbDef
 * @property {Function} method A function implementing the verb.
 * @property {ParamDef[]} params The verb parameter schema.
 */

/**
 * Verb parameter definition.
 * @typedef {object} ParamDef
 * @property {string} name The verb parameter name.
 * @property {ParamType} type The verb parameter type.
 */

/**
 * A package of op function and table method definitions.
 * @typedef {object} Package
 * @property {{[name: string]: Function}} [functions] Standard function entries.
 * @property {{[name: string]: AggregateDef}} [aggregateFunctions] Aggregate function entries.
 * @property {{[name: string]: WindowDef}} [windowFunctions] Window function entries.
 * @property {{[name: string]: Function}} [tableMethods] Table method entries.
 * @property {{[name: string]: VerbDef}} [verbs] Verb entries.
 */

/**
 * An object containing an extension package.
 * @typedef {object} PackageBundle
 * @property {Package} arquero.package The package bundle.
 */

/**
 * Options for registering new functions.
 * @typedef {object} RegisterOptions
 * @property {boolean} [override=false] Flag indicating if the added
 *  function can override an existing function with the same name.
 */
;// ../../node_modules/arquero/src/index.js
// export internal class definitions










const extension_internal = {
  Table: extension_Table,
  ColumnTable: extension_column_table_ColumnTable,
  Transformable: extension_Transformable,
  Query: extension_query_Query,
  Reducer: extension_Reducer,
  Verb: extension_Verb,
  Verbs: extension_verb_Verbs,
  columnFactory: extension_columnFactory,
  parse: extension_expression_parse,
  walk_ast: extension_walk
};

// export public API

const extension_src_version = extension_package_namespaceObject.rE;






















;// ../../node_modules/svelte/store/index.mjs



const extension_subscriber_queue = [];
/**
 * Creates a `Readable` store that allows reading by subscription.
 * @param value initial value
 * @param {StartStopNotifier} [start]
 */
function extension_readable(value, start) {
    return {
        subscribe: extension_writable(value, start).subscribe
    };
}
/**
 * Create a `Writable` store that allows both updating and reading by subscription.
 * @param {*=}value initial value
 * @param {StartStopNotifier=} start
 */
function extension_writable(value, start = extension_noop) {
    let stop;
    const subscribers = new Set();
    function set(new_value) {
        if (extension_safe_not_equal(value, new_value)) {
            value = new_value;
            if (stop) { // store is ready
                const run_queue = !extension_subscriber_queue.length;
                for (const subscriber of subscribers) {
                    subscriber[1]();
                    extension_subscriber_queue.push(subscriber, value);
                }
                if (run_queue) {
                    for (let i = 0; i < extension_subscriber_queue.length; i += 2) {
                        extension_subscriber_queue[i][0](extension_subscriber_queue[i + 1]);
                    }
                    extension_subscriber_queue.length = 0;
                }
            }
        }
    }
    function update(fn) {
        set(fn(value));
    }
    function subscribe(run, invalidate = extension_noop) {
        const subscriber = [run, invalidate];
        subscribers.add(subscriber);
        if (subscribers.size === 1) {
            stop = start(set) || extension_noop;
        }
        run(value);
        return () => {
            subscribers.delete(subscriber);
            if (subscribers.size === 0 && stop) {
                stop();
                stop = null;
            }
        };
    }
    return { set, update, subscribe };
}
function extension_derived(stores, fn, initial_value) {
    const single = !Array.isArray(stores);
    const stores_array = single
        ? [stores]
        : stores;
    const auto = fn.length < 2;
    return extension_readable(initial_value, (set) => {
        let started = false;
        const values = [];
        let pending = 0;
        let cleanup = extension_noop;
        const sync = () => {
            if (pending) {
                return;
            }
            cleanup();
            const result = fn(single ? values[0] : values, set);
            if (auto) {
                set(result);
            }
            else {
                cleanup = extension_internal_is_function(result) ? result : extension_noop;
            }
        };
        const unsubscribers = stores_array.map((store, i) => extension_subscribe(store, (value) => {
            values[i] = value;
            pending &= ~(1 << i);
            if (started) {
                sync();
            }
        }, () => {
            pending |= (1 << i);
        }));
        started = true;
        sync();
        return function stop() {
            extension_run_all(unsubscribers);
            cleanup();
            // We need to set this to false because callbacks can still happen despite having unsubscribed:
            // Callbacks might already be placed in the queue which doesn't know it should no longer
            // invoke this derived store.
            started = false;
        };
    });
}
/**
 * Takes a store and returns a new one derived from the old one that is readable.
 *
 * @param store - store to make readonly
 */
function extension_readonly(store) {
    return {
        subscribe: store.subscribe.bind(store)
    };
}



;// ../../canvas_viz/dist/helpers/table.js
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
const extension_UNIQUE_COLS_PCTG = 0.1;
function extension_getColumnType(table, columnName) {
    const col = table.column(columnName);
    if (col === undefined) {
        return undefined;
    }
    const firstValue = col.get(0);
    if (firstValue.constructor.name === "SignedBigNum") {
        return "number";
    }
    if (typeof firstValue === "object") {
        const objectClass = firstValue.constructor.name;
        if (objectClass.includes("Array")) {
            return "array";
        }
    }
    return typeof firstValue;
}
function extension_getBinnableStringColumns(table) {
    const colNames = table.columnNames();
    const binnnableStringColumns = [];
    for (const colName of colNames) {
        const columnType = extension_getColumnType(table, colName);
        if (columnType === "string") {
            if (extension_isStringColumnBinnable(colName, table)) {
                binnnableStringColumns.push(colName);
            }
        }
    }
    return binnnableStringColumns;
}
function extension_isStringColumnBinnable(columnName, table) {
    /** If more than UNIQUE_COLS_PCTG percent of the column are unique strings, likely an ID, don't bin. */
    const unique = table.groupby(columnName).count().numRows();
    if (unique < extension_UNIQUE_COLS_PCTG * table.numRows()) {
        return true;
    }
    return false;
}
const extension_cartesian = (...a) => a.reduce((a, b) => a.flatMap((d) => b.map((e) => [d, e].reduce((acc, val) => acc.concat(val), []))));

;// ../../canvas_viz/dist/stores.js
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */




function extension_widgetWritable(name_, value_) {
    const name = name_;
    const curVal = extension_writable(value_);
    let model;
    return {
        set: (v) => {
            curVal.set(v);
            if (model) {
                model.set(name, v);
                model.save_changes();
            }
        },
        setModel: (m) => {
            model = m;
            curVal.set(model.get(name));
            model.on("change:" + name, () => curVal.set(model.get(name)), null);
        },
        subscribe: curVal.subscribe,
        update: (func) => {
            curVal.update((v) => {
                const out = func(v);
                // TODO: figure out why spread operator isn't enough to update model.
                if (model) {
                    model.set(name, "");
                    model.set(name, out);
                    model.save_changes();
                }
                return out;
            });
        },
    };
}
const extension_canvasSpec = extension_widgetWritable("canvas_spec", {});
const extension_widgetSpecs = extension_widgetWritable("widgetSpecs", {});
const extension_dataTable = extension_widgetWritable("table", new DataView(new ArrayBuffer(0)));
const extension_selected = extension_widgetWritable("selected", []);
const extension_groupColumns = extension_widgetWritable("group_columns", []);
const extension_stores_filter = extension_widgetWritable("filter", "");
const extension_filterError = extension_widgetWritable("filter_error", "");
const extension_tooltip = extension_widgetWritable("tooltip", {
    hover: false,
    mousePos: { x: 0, y: 0 },
    fetchPrefix: "",
    instance: undefined,
    number: 0,
});
const extension_stores_table = extension_derived(extension_dataTable, (d) => extension_from_arrow(d));
const extension_filteredTable = extension_derived([extension_stores_table, extension_stores_filter], ([table, filter]) => {
    extension_filterError.set("");
    let filteredTable = table;
    if (filter) {
        try {
            filteredTable = filteredTable.filter(filter);
        }
        catch (err) {
            extension_filterError.set(err);
        }
    }
    return filteredTable;
});
const extension_groupNames = extension_derived([extension_filteredTable, extension_groupColumns], ([filteredTable, groupColumns]) => {
    if (groupColumns.length > 0) {
        const uniqueColumnValues = groupColumns.map((col) => filteredTable
            .rollup({ col: extension_op_api.array_agg_distinct(col) })
            .object().col);
        // If just one column, don't do cartesian product and make it a 2D array.
        if (uniqueColumnValues.length === 1) {
            return uniqueColumnValues[0].map((group) => [group]);
        }
        return extension_cartesian(...uniqueColumnValues);
    }
    else
        return [];
});
const extension_groupedTables = extension_derived([extension_filteredTable, extension_groupColumns, extension_groupNames, extension_canvasSpec], ([filteredTable, groupColumns, groupNames, canvasSpec]) => {
    if (groupColumns !== undefined &&
        filteredTable !== undefined &&
        groupNames !== undefined &&
        groupColumns.length > 0 &&
        groupNames.length > 0) {
        let groupedTable = filteredTable.groupby(...groupColumns);
        let partitions = groupedTable.partitions();
        let groupedTables = partitions.map((partition) => filteredTable.reify(partition));
        return groupedTables;
    }
    else {
        return [];
    }
});
function extension_initializeStores(model) {
    extension_selected.setModel(model);
    extension_stores_filter.setModel(model);
    extension_groupColumns.setModel(model);
    extension_canvasSpec.setModel(model);
    extension_dataTable.setModel(model);
}

;// ../../node_modules/svelte-fa/src/utils.js
const extension_utils_parseNumber = parseFloat;

function extension_joinCss(obj, separator = ';') {
  let texts;
  if (Array.isArray(obj)) {
    texts = obj.filter((text) => text);
  } else {
    texts = [];
    for (const prop in obj) {
      if (obj[prop]) {
        texts.push(`${prop}:${obj[prop]}`);
      }
    }
  }
  return texts.join(separator);
}

function extension_getStyles(style, size, pull, fw) {
  let float;
  let width;
  const height = '1em';
  let lineHeight;
  let fontSize;
  let textAlign;
  let verticalAlign = '-.125em';
  const overflow = 'visible';

  if (fw) {
    textAlign = 'center';
    width = '1.25em';
  }

  if (pull) {
    float = pull;
  }

  if (size) {
    if (size == 'lg') {
      fontSize = '1.33333em';
      lineHeight = '.75em';
      verticalAlign = '-.225em';
    } else if (size == 'xs') {
      fontSize = '.75em';
    } else if (size == 'sm') {
      fontSize = '.875em';
    } else {
      fontSize = size.replace('x', 'em');
    }
  }

  return extension_joinCss([
    extension_joinCss({
      float,
      width,
      height,
      'line-height': lineHeight,
      'font-size': fontSize,
      'text-align': textAlign,
      'vertical-align': verticalAlign,
      'transform-origin': 'center',
      overflow,
    }),
    style,
  ]);
}

function extension_getTransform(
  scale,
  translateX,
  translateY,
  rotate,
  flip,
  translateTimes = 1,
  translateUnit = '',
  rotateUnit = '',
) {
  let flipX = 1;
  let flipY = 1;

  if (flip) {
    if (flip == 'horizontal') {
      flipX = -1;
    } else if (flip == 'vertical') {
      flipY = -1;
    } else {
      flipX = flipY = -1;
    }
  }

  return extension_joinCss(
    [
      `translate(${extension_utils_parseNumber(translateX) * translateTimes}${translateUnit},${extension_utils_parseNumber(translateY) * translateTimes}${translateUnit})`,
      `scale(${flipX * extension_utils_parseNumber(scale)},${flipY * extension_utils_parseNumber(scale)})`,
      rotate && `rotate(${rotate}${rotateUnit})`,
    ],
    ' ',
  );
}

;// ../../node_modules/svelte-fa/src/fa.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/node_modules/svelte-fa/src/fa.svelte generated by Svelte v3.59.2 */




function extension_add_css(target) {
	extension_append_styles(target, "svelte-q6amlk", ".spin.svelte-q6amlk{-webkit-animation:svelte-q6amlk-spin 2s 0s infinite linear;animation:svelte-q6amlk-spin 2s 0s infinite linear}.pulse.svelte-q6amlk{-webkit-animation:svelte-q6amlk-spin 1s infinite steps(8);animation:svelte-q6amlk-spin 1s infinite steps(8)}@-webkit-keyframes svelte-q6amlk-spin{0%{-webkit-transform:rotate(0deg);transform:rotate(0deg)}100%{-webkit-transform:rotate(360deg);transform:rotate(360deg)}}@keyframes svelte-q6amlk-spin{0%{-webkit-transform:rotate(0deg);transform:rotate(0deg)}100%{-webkit-transform:rotate(360deg);transform:rotate(360deg)}}");
}

// (93:0) {#if i[4]}
function extension_create_if_block(ctx) {
	let svg;
	let g1;
	let g0;
	let g1_transform_value;
	let g1_transform_origin_value;
	let svg_class_value;
	let svg_viewBox_value;

	function select_block_type(ctx, dirty) {
		if (typeof /*i*/ ctx[7][4] == 'string') return extension_create_if_block_1;
		return extension_create_else_block;
	}

	let current_block_type = select_block_type(ctx, -1);
	let if_block = current_block_type(ctx);

	return {
		c() {
			svg = extension_svg_element("svg");
			g1 = extension_svg_element("g");
			g0 = extension_svg_element("g");
			if_block.c();
			extension_attr(g0, "transform", /*transform*/ ctx[10]);
			extension_attr(g1, "transform", g1_transform_value = `translate(${/*i*/ ctx[7][0] / 2} ${/*i*/ ctx[7][1] / 2})`);
			extension_attr(g1, "transform-origin", g1_transform_origin_value = `${/*i*/ ctx[7][0] / 4} 0`);
			extension_attr(svg, "id", /*id*/ ctx[0]);
			extension_attr(svg, "class", svg_class_value = "" + (extension_null_to_empty(/*c*/ ctx[8]) + " svelte-q6amlk"));
			extension_attr(svg, "style", /*s*/ ctx[9]);
			extension_attr(svg, "viewBox", svg_viewBox_value = `0 0 ${/*i*/ ctx[7][0]} ${/*i*/ ctx[7][1]}`);
			extension_attr(svg, "aria-hidden", "true");
			extension_attr(svg, "role", "img");
			extension_attr(svg, "xmlns", "http://www.w3.org/2000/svg");
		},
		m(target, anchor) {
			extension_insert(target, svg, anchor);
			extension_append(svg, g1);
			extension_append(g1, g0);
			if_block.m(g0, null);
		},
		p(ctx, dirty) {
			if (current_block_type === (current_block_type = select_block_type(ctx, dirty)) && if_block) {
				if_block.p(ctx, dirty);
			} else {
				if_block.d(1);
				if_block = current_block_type(ctx);

				if (if_block) {
					if_block.c();
					if_block.m(g0, null);
				}
			}

			if (dirty & /*transform*/ 1024) {
				extension_attr(g0, "transform", /*transform*/ ctx[10]);
			}

			if (dirty & /*i*/ 128 && g1_transform_value !== (g1_transform_value = `translate(${/*i*/ ctx[7][0] / 2} ${/*i*/ ctx[7][1] / 2})`)) {
				extension_attr(g1, "transform", g1_transform_value);
			}

			if (dirty & /*i*/ 128 && g1_transform_origin_value !== (g1_transform_origin_value = `${/*i*/ ctx[7][0] / 4} 0`)) {
				extension_attr(g1, "transform-origin", g1_transform_origin_value);
			}

			if (dirty & /*id*/ 1) {
				extension_attr(svg, "id", /*id*/ ctx[0]);
			}

			if (dirty & /*c*/ 256 && svg_class_value !== (svg_class_value = "" + (extension_null_to_empty(/*c*/ ctx[8]) + " svelte-q6amlk"))) {
				extension_attr(svg, "class", svg_class_value);
			}

			if (dirty & /*s*/ 512) {
				extension_attr(svg, "style", /*s*/ ctx[9]);
			}

			if (dirty & /*i*/ 128 && svg_viewBox_value !== (svg_viewBox_value = `0 0 ${/*i*/ ctx[7][0]} ${/*i*/ ctx[7][1]}`)) {
				extension_attr(svg, "viewBox", svg_viewBox_value);
			}
		},
		d(detaching) {
			if (detaching) extension_detach(svg);
			if_block.d();
		}
	};
}

// (114:8) {:else}
function extension_create_else_block(ctx) {
	let path0;
	let path0_d_value;
	let path0_fill_value;
	let path0_fill_opacity_value;
	let path0_transform_value;
	let path1;
	let path1_d_value;
	let path1_fill_value;
	let path1_fill_opacity_value;
	let path1_transform_value;

	return {
		c() {
			path0 = extension_svg_element("path");
			path1 = extension_svg_element("path");
			extension_attr(path0, "d", path0_d_value = /*i*/ ctx[7][4][0]);
			extension_attr(path0, "fill", path0_fill_value = /*secondaryColor*/ ctx[3] || /*color*/ ctx[1] || 'currentColor');

			extension_attr(path0, "fill-opacity", path0_fill_opacity_value = /*swapOpacity*/ ctx[6] != false
			? /*primaryOpacity*/ ctx[4]
			: /*secondaryOpacity*/ ctx[5]);

			extension_attr(path0, "transform", path0_transform_value = `translate(${/*i*/ ctx[7][0] / -2} ${/*i*/ ctx[7][1] / -2})`);
			extension_attr(path1, "d", path1_d_value = /*i*/ ctx[7][4][1]);
			extension_attr(path1, "fill", path1_fill_value = /*primaryColor*/ ctx[2] || /*color*/ ctx[1] || 'currentColor');

			extension_attr(path1, "fill-opacity", path1_fill_opacity_value = /*swapOpacity*/ ctx[6] != false
			? /*secondaryOpacity*/ ctx[5]
			: /*primaryOpacity*/ ctx[4]);

			extension_attr(path1, "transform", path1_transform_value = `translate(${/*i*/ ctx[7][0] / -2} ${/*i*/ ctx[7][1] / -2})`);
		},
		m(target, anchor) {
			extension_insert(target, path0, anchor);
			extension_insert(target, path1, anchor);
		},
		p(ctx, dirty) {
			if (dirty & /*i*/ 128 && path0_d_value !== (path0_d_value = /*i*/ ctx[7][4][0])) {
				extension_attr(path0, "d", path0_d_value);
			}

			if (dirty & /*secondaryColor, color*/ 10 && path0_fill_value !== (path0_fill_value = /*secondaryColor*/ ctx[3] || /*color*/ ctx[1] || 'currentColor')) {
				extension_attr(path0, "fill", path0_fill_value);
			}

			if (dirty & /*swapOpacity, primaryOpacity, secondaryOpacity*/ 112 && path0_fill_opacity_value !== (path0_fill_opacity_value = /*swapOpacity*/ ctx[6] != false
			? /*primaryOpacity*/ ctx[4]
			: /*secondaryOpacity*/ ctx[5])) {
				extension_attr(path0, "fill-opacity", path0_fill_opacity_value);
			}

			if (dirty & /*i*/ 128 && path0_transform_value !== (path0_transform_value = `translate(${/*i*/ ctx[7][0] / -2} ${/*i*/ ctx[7][1] / -2})`)) {
				extension_attr(path0, "transform", path0_transform_value);
			}

			if (dirty & /*i*/ 128 && path1_d_value !== (path1_d_value = /*i*/ ctx[7][4][1])) {
				extension_attr(path1, "d", path1_d_value);
			}

			if (dirty & /*primaryColor, color*/ 6 && path1_fill_value !== (path1_fill_value = /*primaryColor*/ ctx[2] || /*color*/ ctx[1] || 'currentColor')) {
				extension_attr(path1, "fill", path1_fill_value);
			}

			if (dirty & /*swapOpacity, secondaryOpacity, primaryOpacity*/ 112 && path1_fill_opacity_value !== (path1_fill_opacity_value = /*swapOpacity*/ ctx[6] != false
			? /*secondaryOpacity*/ ctx[5]
			: /*primaryOpacity*/ ctx[4])) {
				extension_attr(path1, "fill-opacity", path1_fill_opacity_value);
			}

			if (dirty & /*i*/ 128 && path1_transform_value !== (path1_transform_value = `translate(${/*i*/ ctx[7][0] / -2} ${/*i*/ ctx[7][1] / -2})`)) {
				extension_attr(path1, "transform", path1_transform_value);
			}
		},
		d(detaching) {
			if (detaching) extension_detach(path0);
			if (detaching) extension_detach(path1);
		}
	};
}

// (108:8) {#if typeof i[4] == 'string'}
function extension_create_if_block_1(ctx) {
	let path;
	let path_d_value;
	let path_fill_value;
	let path_transform_value;

	return {
		c() {
			path = extension_svg_element("path");
			extension_attr(path, "d", path_d_value = /*i*/ ctx[7][4]);
			extension_attr(path, "fill", path_fill_value = /*color*/ ctx[1] || /*primaryColor*/ ctx[2] || 'currentColor');
			extension_attr(path, "transform", path_transform_value = `translate(${/*i*/ ctx[7][0] / -2} ${/*i*/ ctx[7][1] / -2})`);
		},
		m(target, anchor) {
			extension_insert(target, path, anchor);
		},
		p(ctx, dirty) {
			if (dirty & /*i*/ 128 && path_d_value !== (path_d_value = /*i*/ ctx[7][4])) {
				extension_attr(path, "d", path_d_value);
			}

			if (dirty & /*color, primaryColor*/ 6 && path_fill_value !== (path_fill_value = /*color*/ ctx[1] || /*primaryColor*/ ctx[2] || 'currentColor')) {
				extension_attr(path, "fill", path_fill_value);
			}

			if (dirty & /*i*/ 128 && path_transform_value !== (path_transform_value = `translate(${/*i*/ ctx[7][0] / -2} ${/*i*/ ctx[7][1] / -2})`)) {
				extension_attr(path, "transform", path_transform_value);
			}
		},
		d(detaching) {
			if (detaching) extension_detach(path);
		}
	};
}

function extension_create_fragment(ctx) {
	let if_block_anchor;
	let if_block = /*i*/ ctx[7][4] && extension_create_if_block(ctx);

	return {
		c() {
			if (if_block) if_block.c();
			if_block_anchor = extension_empty();
		},
		m(target, anchor) {
			if (if_block) if_block.m(target, anchor);
			extension_insert(target, if_block_anchor, anchor);
		},
		p(ctx, [dirty]) {
			if (/*i*/ ctx[7][4]) {
				if (if_block) {
					if_block.p(ctx, dirty);
				} else {
					if_block = extension_create_if_block(ctx);
					if_block.c();
					if_block.m(if_block_anchor.parentNode, if_block_anchor);
				}
			} else if (if_block) {
				if_block.d(1);
				if_block = null;
			}
		},
		i: extension_noop,
		o: extension_noop,
		d(detaching) {
			if (if_block) if_block.d(detaching);
			if (detaching) extension_detach(if_block_anchor);
		}
	};
}

function extension_fa_svelte_instance($$self, $$props, $$invalidate) {
	let { class: clazz = '' } = $$props;
	let { id = '' } = $$props;
	let { style = '' } = $$props;
	let { icon } = $$props;
	let { size = '' } = $$props;
	let { color = '' } = $$props;
	let { fw = false } = $$props;
	let { pull = '' } = $$props;
	let { scale = 1 } = $$props;
	let { translateX = 0 } = $$props;
	let { translateY = 0 } = $$props;
	let { rotate = '' } = $$props;
	let { flip = false } = $$props;
	let { spin = false } = $$props;
	let { pulse = false } = $$props;
	let { primaryColor = '' } = $$props;
	let { secondaryColor = '' } = $$props;
	let { primaryOpacity = 1 } = $$props;
	let { secondaryOpacity = 0.4 } = $$props;
	let { swapOpacity = false } = $$props;
	let i;
	let c;
	let s;
	let transform;

	$$self.$$set = $$props => {
		if ('class' in $$props) $$invalidate(11, clazz = $$props.class);
		if ('id' in $$props) $$invalidate(0, id = $$props.id);
		if ('style' in $$props) $$invalidate(12, style = $$props.style);
		if ('icon' in $$props) $$invalidate(13, icon = $$props.icon);
		if ('size' in $$props) $$invalidate(14, size = $$props.size);
		if ('color' in $$props) $$invalidate(1, color = $$props.color);
		if ('fw' in $$props) $$invalidate(15, fw = $$props.fw);
		if ('pull' in $$props) $$invalidate(16, pull = $$props.pull);
		if ('scale' in $$props) $$invalidate(17, scale = $$props.scale);
		if ('translateX' in $$props) $$invalidate(18, translateX = $$props.translateX);
		if ('translateY' in $$props) $$invalidate(19, translateY = $$props.translateY);
		if ('rotate' in $$props) $$invalidate(20, rotate = $$props.rotate);
		if ('flip' in $$props) $$invalidate(21, flip = $$props.flip);
		if ('spin' in $$props) $$invalidate(22, spin = $$props.spin);
		if ('pulse' in $$props) $$invalidate(23, pulse = $$props.pulse);
		if ('primaryColor' in $$props) $$invalidate(2, primaryColor = $$props.primaryColor);
		if ('secondaryColor' in $$props) $$invalidate(3, secondaryColor = $$props.secondaryColor);
		if ('primaryOpacity' in $$props) $$invalidate(4, primaryOpacity = $$props.primaryOpacity);
		if ('secondaryOpacity' in $$props) $$invalidate(5, secondaryOpacity = $$props.secondaryOpacity);
		if ('swapOpacity' in $$props) $$invalidate(6, swapOpacity = $$props.swapOpacity);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*icon*/ 8192) {
			$: $$invalidate(7, i = icon && icon.icon || [0, 0, '', [], '']);
		}

		if ($$self.$$.dirty & /*clazz, spin, pulse*/ 12584960) {
			$: $$invalidate(8, c = extension_joinCss([clazz, 'svelte-fa', spin && 'spin', pulse && 'pulse'], ' '));
		}

		if ($$self.$$.dirty & /*style, size, pull, fw*/ 118784) {
			$: $$invalidate(9, s = extension_getStyles(style, size, pull, fw));
		}

		if ($$self.$$.dirty & /*scale, translateX, translateY, rotate, flip*/ 4063232) {
			$: $$invalidate(10, transform = extension_getTransform(scale, translateX, translateY, rotate, flip, 512));
		}
	};

	return [
		id,
		color,
		primaryColor,
		secondaryColor,
		primaryOpacity,
		secondaryOpacity,
		swapOpacity,
		i,
		c,
		s,
		transform,
		clazz,
		style,
		icon,
		size,
		fw,
		pull,
		scale,
		translateX,
		translateY,
		rotate,
		flip,
		spin,
		pulse
	];
}

class extension_Fa extends extension_SvelteComponent {
	constructor(options) {
		super();

		extension_init(
			this,
			options,
			extension_fa_svelte_instance,
			extension_create_fragment,
			extension_safe_not_equal,
			{
				class: 11,
				id: 0,
				style: 12,
				icon: 13,
				size: 14,
				color: 1,
				fw: 15,
				pull: 16,
				scale: 17,
				translateX: 18,
				translateY: 19,
				rotate: 20,
				flip: 21,
				spin: 22,
				pulse: 23,
				primaryColor: 2,
				secondaryColor: 3,
				primaryOpacity: 4,
				secondaryOpacity: 5,
				swapOpacity: 6
			},
			extension_add_css
		);
	}
}

/* harmony default export */ const extension_fa_svelte = (extension_Fa);
;// ../../node_modules/svelte/easing/index.mjs


/*
Adapted from https://github.com/mattdesl
Distributed under MIT License https://github.com/mattdesl/eases/blob/master/LICENSE.md
*/
function extension_backInOut(t) {
    const s = 1.70158 * 1.525;
    if ((t *= 2) < 1)
        return 0.5 * (t * t * ((s + 1) * t - s));
    return 0.5 * ((t -= 2) * t * ((s + 1) * t + s) + 2);
}
function extension_backIn(t) {
    const s = 1.70158;
    return t * t * ((s + 1) * t - s);
}
function extension_backOut(t) {
    const s = 1.70158;
    return --t * t * ((s + 1) * t + s) + 1;
}
function extension_bounceOut(t) {
    const a = 4.0 / 11.0;
    const b = 8.0 / 11.0;
    const c = 9.0 / 10.0;
    const ca = 4356.0 / 361.0;
    const cb = 35442.0 / 1805.0;
    const cc = 16061.0 / 1805.0;
    const t2 = t * t;
    return t < a
        ? 7.5625 * t2
        : t < b
            ? 9.075 * t2 - 9.9 * t + 3.4
            : t < c
                ? ca * t2 - cb * t + cc
                : 10.8 * t * t - 20.52 * t + 10.72;
}
function extension_bounceInOut(t) {
    return t < 0.5
        ? 0.5 * (1.0 - extension_bounceOut(1.0 - t * 2.0))
        : 0.5 * extension_bounceOut(t * 2.0 - 1.0) + 0.5;
}
function extension_bounceIn(t) {
    return 1.0 - extension_bounceOut(1.0 - t);
}
function extension_circInOut(t) {
    if ((t *= 2) < 1)
        return -0.5 * (Math.sqrt(1 - t * t) - 1);
    return 0.5 * (Math.sqrt(1 - (t -= 2) * t) + 1);
}
function extension_circIn(t) {
    return 1.0 - Math.sqrt(1.0 - t * t);
}
function extension_circOut(t) {
    return Math.sqrt(1 - --t * t);
}
function extension_easing_cubicInOut(t) {
    return t < 0.5 ? 4.0 * t * t * t : 0.5 * Math.pow(2.0 * t - 2.0, 3.0) + 1.0;
}
function extension_cubicIn(t) {
    return t * t * t;
}
function extension_easing_cubicOut(t) {
    const f = t - 1.0;
    return f * f * f + 1.0;
}
function extension_elasticInOut(t) {
    return t < 0.5
        ? 0.5 *
            Math.sin(((+13.0 * Math.PI) / 2) * 2.0 * t) *
            Math.pow(2.0, 10.0 * (2.0 * t - 1.0))
        : 0.5 *
            Math.sin(((-13.0 * Math.PI) / 2) * (2.0 * t - 1.0 + 1.0)) *
            Math.pow(2.0, -10.0 * (2.0 * t - 1.0)) +
            1.0;
}
function extension_elasticIn(t) {
    return Math.sin((13.0 * t * Math.PI) / 2) * Math.pow(2.0, 10.0 * (t - 1.0));
}
function extension_elasticOut(t) {
    return (Math.sin((-13.0 * (t + 1.0) * Math.PI) / 2) * Math.pow(2.0, -10.0 * t) + 1.0);
}
function extension_expoInOut(t) {
    return t === 0.0 || t === 1.0
        ? t
        : t < 0.5
            ? +0.5 * Math.pow(2.0, 20.0 * t - 10.0)
            : -0.5 * Math.pow(2.0, 10.0 - t * 20.0) + 1.0;
}
function extension_expoIn(t) {
    return t === 0.0 ? t : Math.pow(2.0, 10.0 * (t - 1.0));
}
function extension_expoOut(t) {
    return t === 1.0 ? t : 1.0 - Math.pow(2.0, -10.0 * t);
}
function extension_quadInOut(t) {
    t /= 0.5;
    if (t < 1)
        return 0.5 * t * t;
    t--;
    return -0.5 * (t * (t - 2) - 1);
}
function extension_quadIn(t) {
    return t * t;
}
function extension_quadOut(t) {
    return -t * (t - 2.0);
}
function extension_quartInOut(t) {
    return t < 0.5
        ? +8.0 * Math.pow(t, 4.0)
        : -8.0 * Math.pow(t - 1.0, 4.0) + 1.0;
}
function extension_quartIn(t) {
    return Math.pow(t, 4.0);
}
function extension_quartOut(t) {
    return Math.pow(t - 1.0, 3.0) * (1.0 - t) + 1.0;
}
function extension_quintInOut(t) {
    if ((t *= 2) < 1)
        return 0.5 * t * t * t * t * t;
    return 0.5 * ((t -= 2) * t * t * t * t + 2);
}
function extension_quintIn(t) {
    return t * t * t * t * t;
}
function extension_quintOut(t) {
    return --t * t * t * t * t + 1;
}
function extension_sineInOut(t) {
    return -0.5 * (Math.cos(Math.PI * t) - 1);
}
function extension_sineIn(t) {
    const v = Math.cos(t * Math.PI * 0.5);
    if (Math.abs(v) < 1e-14)
        return 1;
    else
        return 1 - v;
}
function extension_sineOut(t) {
    return Math.sin((t * Math.PI) / 2);
}



;// ../../node_modules/svelte/transition/index.mjs



/******************************************************************************
Copyright (c) Microsoft Corporation.

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */

function extension_rest(s, e) {
    var t = {};
    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
        t[p] = s[p];
    if (s != null && typeof Object.getOwnPropertySymbols === "function")
        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
                t[p[i]] = s[p[i]];
        }
    return t;
}

function extension_transition_blur(node, { delay = 0, duration = 400, easing = cubicInOut, amount = 5, opacity = 0 } = {}) {
    const style = getComputedStyle(node);
    const target_opacity = +style.opacity;
    const f = style.filter === 'none' ? '' : style.filter;
    const od = target_opacity * (1 - opacity);
    const [value, unit] = split_css_unit(amount);
    return {
        delay,
        duration,
        easing,
        css: (_t, u) => `opacity: ${target_opacity - (od * u)}; filter: ${f} blur(${u * value}${unit});`
    };
}
function extension_fade(node, { delay = 0, duration = 400, easing = extension_internal_identity } = {}) {
    const o = +getComputedStyle(node).opacity;
    return {
        delay,
        duration,
        easing,
        css: t => `opacity: ${t * o}`
    };
}
function extension_fly(node, { delay = 0, duration = 400, easing = cubicOut, x = 0, y = 0, opacity = 0 } = {}) {
    const style = getComputedStyle(node);
    const target_opacity = +style.opacity;
    const transform = style.transform === 'none' ? '' : style.transform;
    const od = target_opacity * (1 - opacity);
    const [xValue, xUnit] = split_css_unit(x);
    const [yValue, yUnit] = split_css_unit(y);
    return {
        delay,
        duration,
        easing,
        css: (t, u) => `
			transform: ${transform} translate(${(1 - t) * xValue}${xUnit}, ${(1 - t) * yValue}${yUnit});
			opacity: ${target_opacity - (od * u)}`
    };
}
function extension_slide(node, { delay = 0, duration = 400, easing = extension_easing_cubicOut, axis = 'y' } = {}) {
    const style = getComputedStyle(node);
    const opacity = +style.opacity;
    const primary_property = axis === 'y' ? 'height' : 'width';
    const primary_property_value = parseFloat(style[primary_property]);
    const secondary_properties = axis === 'y' ? ['top', 'bottom'] : ['left', 'right'];
    const capitalized_secondary_properties = secondary_properties.map((e) => `${e[0].toUpperCase()}${e.slice(1)}`);
    const padding_start_value = parseFloat(style[`padding${capitalized_secondary_properties[0]}`]);
    const padding_end_value = parseFloat(style[`padding${capitalized_secondary_properties[1]}`]);
    const margin_start_value = parseFloat(style[`margin${capitalized_secondary_properties[0]}`]);
    const margin_end_value = parseFloat(style[`margin${capitalized_secondary_properties[1]}`]);
    const border_width_start_value = parseFloat(style[`border${capitalized_secondary_properties[0]}Width`]);
    const border_width_end_value = parseFloat(style[`border${capitalized_secondary_properties[1]}Width`]);
    return {
        delay,
        duration,
        easing,
        css: t => 'overflow: hidden;' +
            `opacity: ${Math.min(t * 20, 1) * opacity};` +
            `${primary_property}: ${t * primary_property_value}px;` +
            `padding-${secondary_properties[0]}: ${t * padding_start_value}px;` +
            `padding-${secondary_properties[1]}: ${t * padding_end_value}px;` +
            `margin-${secondary_properties[0]}: ${t * margin_start_value}px;` +
            `margin-${secondary_properties[1]}: ${t * margin_end_value}px;` +
            `border-${secondary_properties[0]}-width: ${t * border_width_start_value}px;` +
            `border-${secondary_properties[1]}-width: ${t * border_width_end_value}px;`
    };
}
function extension_transition_scale(node, { delay = 0, duration = 400, easing = cubicOut, start = 0, opacity = 0 } = {}) {
    const style = getComputedStyle(node);
    const target_opacity = +style.opacity;
    const transform = style.transform === 'none' ? '' : style.transform;
    const sd = 1 - start;
    const od = target_opacity * (1 - opacity);
    return {
        delay,
        duration,
        easing,
        css: (_t, u) => `
			transform: ${transform} scale(${1 - (sd * u)});
			opacity: ${target_opacity - (od * u)}
		`
    };
}
function extension_draw(node, { delay = 0, speed, duration, easing = cubicInOut } = {}) {
    let len = node.getTotalLength();
    const style = getComputedStyle(node);
    if (style.strokeLinecap !== 'butt') {
        len += parseInt(style.strokeWidth);
    }
    if (duration === undefined) {
        if (speed === undefined) {
            duration = 800;
        }
        else {
            duration = len / speed;
        }
    }
    else if (typeof duration === 'function') {
        duration = duration(len);
    }
    return {
        delay,
        duration,
        easing,
        css: (_, u) => `
			stroke-dasharray: ${len};
			stroke-dashoffset: ${u * len};
		`
    };
}
function extension_crossfade(_a) {
    var { fallback } = _a, defaults = extension_rest(_a, ["fallback"]);
    const to_receive = new Map();
    const to_send = new Map();
    function crossfade(from_node, node, params) {
        const { delay = 0, duration = d => Math.sqrt(d) * 30, easing = cubicOut } = assign(assign({}, defaults), params);
        const from = from_node.getBoundingClientRect();
        const to = node.getBoundingClientRect();
        const dx = from.left - to.left;
        const dy = from.top - to.top;
        const dw = from.width / to.width;
        const dh = from.height / to.height;
        const d = Math.sqrt(dx * dx + dy * dy);
        const style = getComputedStyle(node);
        const transform = style.transform === 'none' ? '' : style.transform;
        const opacity = +style.opacity;
        return {
            delay,
            duration: is_function(duration) ? duration(d) : duration,
            easing,
            css: (t, u) => `
				opacity: ${t * opacity};
				transform-origin: top left;
				transform: ${transform} translate(${u * dx}px,${u * dy}px) scale(${t + (1 - t) * dw}, ${t + (1 - t) * dh});
			`
        };
    }
    function transition(items, counterparts, intro) {
        return (node, params) => {
            items.set(params.key, node);
            return () => {
                if (counterparts.has(params.key)) {
                    const other_node = counterparts.get(params.key);
                    counterparts.delete(params.key);
                    return crossfade(other_node, node, params);
                }
                // if the node is disappearing altogether
                // (i.e. wasn't claimed by the other list)
                // then we need to supply an outro
                items.delete(params.key);
                return fallback && fallback(node, params, intro);
            };
        };
    }
    return [
        transition(to_send, to_receive, false),
        transition(to_receive, to_send, true)
    ];
}



// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faChartBar.js
var extension_faChartBar = __webpack_require__(4383);
;// ../../canvas_viz/dist/types.js
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
var extension_CanvasDataType;
(function (CanvasDataType) {
    CanvasDataType[CanvasDataType["TABULAR"] = 1] = "TABULAR";
    CanvasDataType[CanvasDataType["IMAGE"] = 2] = "IMAGE";
    CanvasDataType[CanvasDataType["AUDIO"] = 3] = "AUDIO";
})(extension_CanvasDataType || (extension_CanvasDataType = {}));
var extension_ResolverType;
(function (ResolverType) {
    ResolverType[ResolverType["BINNED_STRING"] = 0] = "BINNED_STRING";
    ResolverType[ResolverType["NUMBER"] = 1] = "NUMBER";
})(extension_ResolverType || (extension_ResolverType = {}));

;// ../../node_modules/@fireflysemantics/join/fesm2015/fireflysemantics-join.js
/**
MIT License

Copyright (c) Firefly Semantics Corporation
Copyright (c) 2020 Ole K. Ersoy
Copyright (c) 2015 José F. Romaniello

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE. */
/**
 * @param args The components of the URL
 * @throws TypeError if the args URL components are not all of type string
 * @return The URL string
 */
function extension_fireflysemantics_join_join(...args) {
    let components = [];
    /**
     * If an empty array is received then
     * the URL is just ''.
     */
    if (args.length === 0) {
        return '';
    }
    /** The args values must be of type string */
    args.forEach(component => {
        if (typeof component !== 'string') {
            throw new TypeError(`Url components must be of type string. 
                    The ${component} component is of type ${typeof component}`);
        }
    });
    /**
     * If the protocol is specified by itself,
     * then the protocol is combined with the
     * subsequent array value.
     */
    const protocol = args[0];
    if (protocol.match(/^[^/:]+:\/*$/) && args.length > 1) {
        var first = args.shift();
        args[0] = first + args[0];
    }
    /**
     * The file protocol should have two or three slashes.
     * Other protocols should have 2.
     */
    if (args[0].match(/^file:\/\/\//)) {
        args[0] = args[0].replace(/^([^/:]+):\/*/, '$1:///');
    }
    else {
        args[0] = args[0].replace(/^([^/:]+):\/*/, '$1://');
    }
    /** The args values must be of type string */
    args.forEach((component, i) => {
        if (component === '') {
            return;
        }
        /**
         * Remove starting slashes for all but the first component
         */
        if (i > 0) {
            component = component.replace(/^[\/]+/, '');
        }
        /**
         * Remove the ending slashes for each component but the last.
         */
        if (i < args.length - 1) {
            component = component.replace(/[\/]+$/, '');
        }
        else {
            // For the last combine multiple slashes into one.
            component = component.replace(/[\/]+$/, '/');
        }
        components.push(component);
    });
    /**
     * Separate all the components by a single /
     */
    let url = components.join('/');
    // remove trailing slash before parameters or hash
    url = url.replace(/\/(\?|&|#[^!])/g, '$1');
    // replace ? in parameters with &
    var parts = url.split('?');
    url = parts.shift() + (parts.length > 0 ? '?' : '') + parts.join('&');
    return url;
}

/*
 * Public API Surface of join
 */

/**
 * Generated bundle index. Do not edit.
 */


//# sourceMappingURL=fireflysemantics-join.js.map

// EXTERNAL MODULE: ../../node_modules/@jupyterlab/services/lib/index.js
var extension_lib = __webpack_require__(7883);
;// ../../canvas_viz/dist/helpers/contentservice.js
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Singleton contentsService class for managing file operations
 */
class extension_ContentsService {
    constructor() {
        var _a;
        const contentsManager = new extension_lib.ContentsManager();
        this.contentsManager = contentsManager;
        // Get the server root from the contents manager settings
        this.baseServerPath = ((_a = contentsManager.serverSettings) === null || _a === void 0 ? void 0 : _a.baseUrl) || process.env.JUPYTER_SERVER_ROOT || '';
    }
    static getInstance() {
        if (!this.instance) {
            this.instance = new extension_ContentsService();
        }
        return this.instance;
    }
    /**
     * Create a file/directory if it does not exist. Otherwise, save the change in a file/directory in the given path
     * @param path path to a file/directory
     * @param options options that specify if it's a file or directory and additial information
     * Usage: save('snippets', { type: 'directory' }) to create/save a directory
     *        save('snippets/test.json', {type: 'file', format: 'text', content: 'Lorem ipsum dolor sit amet'})
     */
    async save(path, options) {
        try {
            const changedModel = await this.contentsManager.save(path, options);
            return changedModel;
        }
        catch (error) {
            console.error('Error saving file/directory:', error);
            throw error; // Re-throw the error instead of returning it
        }
    }
    async readContent(path) {
        try {
            const getFileResult = await this.contentsManager.get(path);
            if (typeof getFileResult.content !== 'string') {
                throw new Error('Unable to read the image');
            }
            return `data:${getFileResult.mimetype};${getFileResult.format},${getFileResult.content}`;
        }
        catch (error) {
            console.error('Error reading file/directory:', error);
            throw error; // Re-throw the error instead of returning it
        }
    }
    async readAudioContent(path) {
        try {
            const getFileResult = await this.contentsManager.get(path);
            if (typeof getFileResult.content !== 'string') {
                throw new Error('Unable to read the Audio data');
            }
            return `${getFileResult.content}`;
        }
        catch (error) {
            console.error('Error reading file/directory:', error);
            throw error; // Re-throw the error instead of returning it
        }
    }
    /**
     * Convert a server path to a local filesystem path
     * @param path - Server path (e.g., '/notebooks/example.ipynb')
     * @returns Local filesystem path (e.g., '/home/user/notebooks/example.ipynb')
     *
     * Usage:
     * ```typescript
     * const serverPath = '/notebooks/example.ipynb';
     * const localPath = contentsService.getLocalPath(serverPath);
     * console.log(localPath); // '/home/user/notebooks/example.ipynb'
     * ```
     */
    getLocalPath(path) {
        const relativePath = this.contentsManager.localPath(path);
        if (!this.baseServerPath) {
            console.warn('Base server path not available, returning relative path');
            return relativePath;
        }
        return `${this.baseServerPath}/${relativePath}`.replace(/\/+/g, '/'); // Clean up any double slashes
    }
    /**
     * Convert a local filesystem path to a server path
     * @param localPath - Local filesystem path (e.g., '/home/user/notebooks/example.ipynb')
     * @returns Server path (e.g., '/notebooks/example.ipynb')
     *
     * Usage:
     * ```typescript
     * const localPath = '/home/user/notebooks/example.ipynb';
     * const serverPath = contentsService.getServerPath(localPath);
     * console.log(serverPath); // '/notebooks/example.ipynb'
     * ```
     */
    getServerPath(localPath) {
        return this.contentsManager.normalize(localPath);
    }
    /**
     * Resolve a relative path against a parent directory
     * @param relativePath - Relative path to resolve (e.g., '../data/file.csv')
     * @param parent - Parent directory to resolve against (e.g., '/notebooks/project')
     * @returns Resolved absolute server path
     *
     * Usage:
     * ```typescript
     * // When in /notebooks/project/analysis
     * const relativePath = '../data/file.csv';
     * const parent = '/notebooks/project/analysis';
     * const resolved = contentsService.resolvePath(relativePath, parent);
     * console.log(resolved); // '/notebooks/project/data/file.csv'
     *
     * // Handle special cases
     * contentsService.resolvePath('.', '/home');        // Returns '/home'
     * contentsService.resolvePath('..', '/home/user');  // Returns '/home'
     * contentsService.resolvePath('file.txt', '/dir');  // Returns '/dir/file.txt'
     * ```
     */
    resolvePath(relativePath, parent) {
        return this.contentsManager.resolvePath(relativePath, parent);
    }
}

;// ../../canvas_viz/dist/elements/ImageSample.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/elements/ImageSample.svelte generated by Svelte v3.59.2 */





function extension_create_catch_block(ctx) {
	let p;
	let t_value = /*error*/ ctx[9].message + "";
	let t;

	return {
		c() {
			p = extension_internal_element("p");
			t = extension_internal_text(t_value);
			extension_attr(p, "class", "error");
		},
		m(target, anchor) {
			extension_insert(target, p, anchor);
			extension_append(p, t);
		},
		p(ctx, dirty) {
			if (dirty & /*imagePromise*/ 8 && t_value !== (t_value = /*error*/ ctx[9].message + "")) extension_set_data(t, t_value);
		},
		d(detaching) {
			if (detaching) extension_detach(p);
		}
	};
}

// (55:2) {:then src}
function extension_create_then_block(ctx) {
	let img;
	let img_src_value;
	let img_alt_value;
	let img_class_value;
	let img_style_value;
	let mounted;
	let dispose;

	return {
		c() {
			img = extension_internal_element("img");
			extension_attr(img, "id", "imageSample");
			if (!extension_src_url_equal(img.src, img_src_value = /*src*/ ctx[8])) extension_attr(img, "src", img_src_value);
			extension_attr(img, "alt", img_alt_value = "Image with title: " + /*id*/ ctx[0]);
			extension_attr(img, "class", img_class_value = /*large*/ ctx[2] ? "mx-1" : "w-12 m-1");
			extension_attr(img, "style", img_style_value = `background: black; max-width: ${/*large*/ ctx[2] ? '256px' : '128px'}`);
		},
		m(target, anchor) {
			extension_insert(target, img, anchor);

			if (!mounted) {
				dispose = extension_listen(img, "error", extension_handleImageError);
				mounted = true;
			}
		},
		p(ctx, dirty) {
			if (dirty & /*imagePromise*/ 8 && !extension_src_url_equal(img.src, img_src_value = /*src*/ ctx[8])) {
				extension_attr(img, "src", img_src_value);
			}

			if (dirty & /*id*/ 1 && img_alt_value !== (img_alt_value = "Image with title: " + /*id*/ ctx[0])) {
				extension_attr(img, "alt", img_alt_value);
			}

			if (dirty & /*large*/ 4 && img_class_value !== (img_class_value = /*large*/ ctx[2] ? "mx-1" : "w-12 m-1")) {
				extension_attr(img, "class", img_class_value);
			}

			if (dirty & /*large*/ 4 && img_style_value !== (img_style_value = `background: black; max-width: ${/*large*/ ctx[2] ? '256px' : '128px'}`)) {
				extension_attr(img, "style", img_style_value);
			}
		},
		d(detaching) {
			if (detaching) extension_detach(img);
			mounted = false;
			dispose();
		}
	};
}

// (53:23)      <p class="loading">Loading...</p>   {:then src}
function extension_create_pending_block(ctx) {
	let p;

	return {
		c() {
			p = extension_internal_element("p");
			p.textContent = "Loading...";
			extension_attr(p, "class", "loading");
		},
		m(target, anchor) {
			extension_insert(target, p, anchor);
		},
		p: extension_noop,
		d(detaching) {
			if (detaching) extension_detach(p);
		}
	};
}

function extension_ImageSample_svelte_create_fragment(ctx) {
	let div;
	let promise;

	let info = {
		ctx,
		current: null,
		token: null,
		hasCatch: true,
		pending: extension_create_pending_block,
		then: extension_create_then_block,
		catch: extension_create_catch_block,
		value: 8,
		error: 9
	};

	extension_handle_promise(promise = /*imagePromise*/ ctx[3], info);

	return {
		c() {
			div = extension_internal_element("div");
			info.block.c();
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			info.block.m(div, info.anchor = null);
			info.mount = () => div;
			info.anchor = null;
		},
		p(new_ctx, [dirty]) {
			ctx = new_ctx;
			info.ctx = ctx;

			if (dirty & /*imagePromise*/ 8 && promise !== (promise = /*imagePromise*/ ctx[3]) && extension_handle_promise(promise, info)) {
				
			} else {
				extension_update_await_block_branch(info, ctx, dirty);
			}
		},
		i: extension_noop,
		o: extension_noop,
		d(detaching) {
			if (detaching) extension_detach(div);
			info.block.d();
			info.token = null;
			info = null;
		}
	};
}

function extension_handleImageError(event) {
	console.error("Error loading image:", event);
	const target = event.target;
	target.alt = 'Image failed to load';
}

function extension_ImageSample_svelte_instance($$self, $$props, $$invalidate) {
	let $canvasSpec,
		$$unsubscribe_canvasSpec = extension_noop,
		$$subscribe_canvasSpec = () => ($$unsubscribe_canvasSpec(), $$unsubscribe_canvasSpec = extension_subscribe(canvasSpec, $$value => $$invalidate(5, $canvasSpec = $$value)), canvasSpec);

	$$self.$$.on_destroy.push(() => $$unsubscribe_canvasSpec());
	let { id } = $$props;
	let { canvasSpec } = $$props;
	$$subscribe_canvasSpec();
	let { large = false } = $$props;
	let { storybook = false } = $$props;
	let imagePromise;
	const contentsManager = extension_ContentsService.getInstance();

	async function loadImage(filesPath, imageId) {
		// console.log("Loading image:", imageId);
		if (storybook) {
			// console.log("Loading image from storybook:", join(filesPath, imageId));
			return extension_fireflysemantics_join_join(filesPath, imageId);
		} else {
			try {
				const filePath = extension_fireflysemantics_join_join(filesPath, imageId);
				const result = await contentsManager.readContent(filePath);

				if (typeof result !== 'string') {
					throw new Error('Unexpected content type');
				}

				return result;
			} catch(error) {
				console.error('Error reading image file:', error);
				throw new Error(`Failed to load image: ${imageId}`);
			}
		}
	}

	$$self.$$set = $$props => {
		if ('id' in $$props) $$invalidate(0, id = $$props.id);
		if ('canvasSpec' in $$props) $$subscribe_canvasSpec($$invalidate(1, canvasSpec = $$props.canvasSpec));
		if ('large' in $$props) $$invalidate(2, large = $$props.large);
		if ('storybook' in $$props) $$invalidate(4, storybook = $$props.storybook);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*$canvasSpec, id*/ 33) {
			$: $$invalidate(3, imagePromise = loadImage($canvasSpec.filesPath, id));
		}
	};

	return [id, canvasSpec, large, imagePromise, storybook, $canvasSpec];
}

class extension_ImageSample extends extension_SvelteComponent {
	constructor(options) {
		super();

		extension_init(this, options, extension_ImageSample_svelte_instance, extension_ImageSample_svelte_create_fragment, extension_safe_not_equal, {
			id: 0,
			canvasSpec: 1,
			large: 2,
			storybook: 4
		});
	}
}

/* harmony default export */ const extension_ImageSample_svelte = (extension_ImageSample);
;// ../../node_modules/svelte/index.mjs


// EXTERNAL MODULE: ../../node_modules/wavesurfer.js/dist/wavesurfer.js
var extension_dist_wavesurfer = __webpack_require__(7290);
var extension_wavesurfer_default = /*#__PURE__*/__webpack_require__.n(extension_dist_wavesurfer);
;// ../../canvas_viz/dist/elements/IconButton.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/elements/IconButton.svelte generated by Svelte v3.59.2 */


const extension_get_text_slot_changes = dirty => ({});
const extension_get_text_slot_context = ctx => ({});
const extension_get_icon_slot_changes = dirty => ({});
const extension_get_icon_slot_context = ctx => ({});

// (26:4) {#if $$slots.icon}
function extension_IconButton_svelte_create_if_block(ctx) {
	let div;
	let div_class_value;
	let current;
	const icon_slot_template = /*#slots*/ ctx[3].icon;
	const icon_slot = extension_create_slot(icon_slot_template, ctx, /*$$scope*/ ctx[2], extension_get_icon_slot_context);

	return {
		c() {
			div = extension_internal_element("div");
			if (icon_slot) icon_slot.c();
			extension_attr(div, "class", div_class_value = /*$$slots*/ ctx[1].text ? "pr-2 flex" : "flex");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);

			if (icon_slot) {
				icon_slot.m(div, null);
			}

			current = true;
		},
		p(ctx, dirty) {
			if (icon_slot) {
				if (icon_slot.p && (!current || dirty & /*$$scope*/ 4)) {
					extension_update_slot_base(
						icon_slot,
						icon_slot_template,
						ctx,
						/*$$scope*/ ctx[2],
						!current
						? extension_get_all_dirty_from_scope(/*$$scope*/ ctx[2])
						: extension_get_slot_changes(icon_slot_template, /*$$scope*/ ctx[2], dirty, extension_get_icon_slot_changes),
						extension_get_icon_slot_context
					);
				}
			}

			if (!current || dirty & /*$$slots*/ 2 && div_class_value !== (div_class_value = /*$$slots*/ ctx[1].text ? "pr-2 flex" : "flex")) {
				extension_attr(div, "class", div_class_value);
			}
		},
		i(local) {
			if (current) return;
			extension_transition_in(icon_slot, local);
			current = true;
		},
		o(local) {
			extension_transition_out(icon_slot, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			if (icon_slot) icon_slot.d(detaching);
		}
	};
}

function extension_IconButton_svelte_create_fragment(ctx) {
	let button;
	let div;
	let t;
	let button_class_value;
	let current;
	let mounted;
	let dispose;
	let if_block = /*$$slots*/ ctx[1].icon && extension_IconButton_svelte_create_if_block(ctx);
	const text_slot_template = /*#slots*/ ctx[3].text;
	const text_slot = extension_create_slot(text_slot_template, ctx, /*$$scope*/ ctx[2], extension_get_text_slot_context);

	return {
		c() {
			button = extension_internal_element("button");
			div = extension_internal_element("div");
			if (if_block) if_block.c();
			t = extension_space();
			if (text_slot) text_slot.c();
			extension_attr(div, "class", "flex items-center");

			extension_attr(button, "class", button_class_value = "" + ((/*filled*/ ctx[0]
			? 'bg-button hover:bg-button_hover text-text-dark'
			: 'bg-white text-button border border-button hover:bg-button hover:text-white') + " rounded-md py-1 px-2 transition"));
		},
		m(target, anchor) {
			extension_insert(target, button, anchor);
			extension_append(button, div);
			if (if_block) if_block.m(div, null);
			extension_append(div, t);

			if (text_slot) {
				text_slot.m(div, null);
			}

			current = true;

			if (!mounted) {
				dispose = [
					extension_listen(button, "click", /*click_handler*/ ctx[4]),
					extension_listen(button, "mouseleave", /*mouseleave_handler*/ ctx[5])
				];

				mounted = true;
			}
		},
		p(ctx, [dirty]) {
			if (/*$$slots*/ ctx[1].icon) {
				if (if_block) {
					if_block.p(ctx, dirty);

					if (dirty & /*$$slots*/ 2) {
						extension_transition_in(if_block, 1);
					}
				} else {
					if_block = extension_IconButton_svelte_create_if_block(ctx);
					if_block.c();
					extension_transition_in(if_block, 1);
					if_block.m(div, t);
				}
			} else if (if_block) {
				extension_group_outros();

				extension_transition_out(if_block, 1, 1, () => {
					if_block = null;
				});

				extension_check_outros();
			}

			if (text_slot) {
				if (text_slot.p && (!current || dirty & /*$$scope*/ 4)) {
					extension_update_slot_base(
						text_slot,
						text_slot_template,
						ctx,
						/*$$scope*/ ctx[2],
						!current
						? extension_get_all_dirty_from_scope(/*$$scope*/ ctx[2])
						: extension_get_slot_changes(text_slot_template, /*$$scope*/ ctx[2], dirty, extension_get_text_slot_changes),
						extension_get_text_slot_context
					);
				}
			}

			if (!current || dirty & /*filled*/ 1 && button_class_value !== (button_class_value = "" + ((/*filled*/ ctx[0]
			? 'bg-button hover:bg-button_hover text-text-dark'
			: 'bg-white text-button border border-button hover:bg-button hover:text-white') + " rounded-md py-1 px-2 transition"))) {
				extension_attr(button, "class", button_class_value);
			}
		},
		i(local) {
			if (current) return;
			extension_transition_in(if_block);
			extension_transition_in(text_slot, local);
			current = true;
		},
		o(local) {
			extension_transition_out(if_block);
			extension_transition_out(text_slot, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(button);
			if (if_block) if_block.d();
			if (text_slot) text_slot.d(detaching);
			mounted = false;
			extension_run_all(dispose);
		}
	};
}

function extension_IconButton_svelte_instance($$self, $$props, $$invalidate) {
	let { $$slots: slots = {}, $$scope } = $$props;
	const $$slots = extension_compute_slots(slots);
	let { filled = false } = $$props;

	function click_handler(event) {
		extension_bubble.call(this, $$self, event);
	}

	function mouseleave_handler(event) {
		extension_bubble.call(this, $$self, event);
	}

	$$self.$$set = $$props => {
		if ('filled' in $$props) $$invalidate(0, filled = $$props.filled);
		if ('$$scope' in $$props) $$invalidate(2, $$scope = $$props.$$scope);
	};

	return [filled, $$slots, $$scope, slots, click_handler, mouseleave_handler];
}

class extension_IconButton extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_IconButton_svelte_instance, extension_IconButton_svelte_create_fragment, extension_safe_not_equal, { filled: 0 });
	}
}

/* harmony default export */ const extension_IconButton_svelte = (extension_IconButton);
// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faPlay.js
var extension_faPlay = __webpack_require__(3852);
// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faPause.js
var extension_faPause = __webpack_require__(2162);
;// ../../canvas_viz/dist/elements/AudioSample.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/elements/AudioSample.svelte generated by Svelte v3.59.2 */











function extension_create_icon_slot(ctx) {
	let fa;
	let current;

	fa = new extension_fa_svelte({
			props: {
				icon: /*playing*/ ctx[3] ? extension_faPause/* faPause */.G1 : extension_faPlay/* faPlay */.ij,
				slot: "icon"
			}
		});

	return {
		c() {
			extension_create_component(fa.$$.fragment);
		},
		m(target, anchor) {
			extension_mount_component(fa, target, anchor);
			current = true;
		},
		p(ctx, dirty) {
			const fa_changes = {};
			if (dirty & /*playing*/ 8) fa_changes.icon = /*playing*/ ctx[3] ? extension_faPause/* faPause */.G1 : extension_faPlay/* faPlay */.ij;
			fa.$set(fa_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(fa.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(fa.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			extension_destroy_component(fa, detaching);
		}
	};
}

function extension_AudioSample_svelte_create_fragment(ctx) {
	let div2;
	let div0;
	let t;
	let div1;
	let iconbutton;
	let div2_class_value;
	let current;
	let mounted;
	let dispose;

	iconbutton = new extension_IconButton_svelte({
			props: {
				$$slots: { icon: [extension_create_icon_slot] },
				$$scope: { ctx }
			}
		});

	iconbutton.$on("click", /*changePlayStatus*/ ctx[4]);

	return {
		c() {
			div2 = extension_internal_element("div");
			div0 = extension_internal_element("div");
			t = extension_space();
			div1 = extension_internal_element("div");
			extension_create_component(iconbutton.$$.fragment);
			extension_attr(div2, "class", div2_class_value = "flex flex-col " + (/*large*/ ctx[1] ? 'w-48 mx-1' : 'w-24 m-1'));
		},
		m(target, anchor) {
			extension_insert(target, div2, anchor);
			extension_append(div2, div0);
			/*div0_binding*/ ctx[11](div0);
			extension_append(div2, t);
			extension_append(div2, div1);
			extension_mount_component(iconbutton, div1, null);
			current = true;

			if (!mounted) {
				dispose = extension_listen(div0, "click", /*click_handler*/ ctx[10]);
				mounted = true;
			}
		},
		p(ctx, [dirty]) {
			const iconbutton_changes = {};

			if (dirty & /*$$scope, playing*/ 8200) {
				iconbutton_changes.$$scope = { dirty, ctx };
			}

			iconbutton.$set(iconbutton_changes);

			if (!current || dirty & /*large*/ 2 && div2_class_value !== (div2_class_value = "flex flex-col " + (/*large*/ ctx[1] ? 'w-48 mx-1' : 'w-24 m-1'))) {
				extension_attr(div2, "class", div2_class_value);
			}
		},
		i(local) {
			if (current) return;
			extension_transition_in(iconbutton.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(iconbutton.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div2);
			/*div0_binding*/ ctx[11](null);
			extension_destroy_component(iconbutton);
			mounted = false;
			dispose();
		}
	};
}

function extension_base64ToArrayBuffer(base64) {
	try {
		const trimmedBase64 = base64.trim();
		const binaryString = atob(trimmedBase64);
		const bytes = new Uint8Array(binaryString.length);

		for (let i = 0; i < binaryString.length; i++) {
			bytes[i] = binaryString.charCodeAt(i);
		}

		return bytes.buffer;
	} catch(error) {
		console.error("Failed to decode base64 string:", error);
		console.log("Problematic base64 string:", base64);
		throw error;
	}
}

function extension_AudioSample_svelte_instance($$self, $$props, $$invalidate) {
	let $canvasSpec,
		$$unsubscribe_canvasSpec = extension_noop,
		$$subscribe_canvasSpec = () => ($$unsubscribe_canvasSpec(), $$unsubscribe_canvasSpec = extension_subscribe(canvasSpec, $$value => $$invalidate(9, $canvasSpec = $$value)), canvasSpec);

	$$self.$$.on_destroy.push(() => $$unsubscribe_canvasSpec());
	let { id } = $$props;
	let { canvasSpec } = $$props;
	$$subscribe_canvasSpec();
	let { large = false } = $$props;
	let { storybook = false } = $$props;
	const contentsManager = extension_ContentsService.getInstance();
	let container;
	let wavesurfer;
	let playing = false;
	let oldId = "";

	function changePlayStatus() {
		if (playing) {
			wavesurfer.pause();
			$$invalidate(3, playing = false);
		} else {
			wavesurfer.play();
			$$invalidate(3, playing = true);
		}
	}

	extension_onDestroy(() => {
		if (wavesurfer) {
			wavesurfer.destroy();
		}
	});

	function click_handler(event) {
		extension_bubble.call(this, $$self, event);
	}

	function div0_binding($$value) {
		extension_binding_callbacks[$$value ? 'unshift' : 'push'](() => {
			container = $$value;
			((((($$invalidate(2, container), $$invalidate(5, id)), $$invalidate(8, oldId)), $$invalidate(7, wavesurfer)), $$invalidate(9, $canvasSpec)), $$invalidate(6, storybook));
		});
	}

	$$self.$$set = $$props => {
		if ('id' in $$props) $$invalidate(5, id = $$props.id);
		if ('canvasSpec' in $$props) $$subscribe_canvasSpec($$invalidate(0, canvasSpec = $$props.canvasSpec));
		if ('large' in $$props) $$invalidate(1, large = $$props.large);
		if ('storybook' in $$props) $$invalidate(6, storybook = $$props.storybook);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*container, id, oldId, wavesurfer, $canvasSpec, storybook*/ 996) {
			$: if (container !== undefined && id !== oldId) {
				if (wavesurfer !== undefined) wavesurfer.destroy();
				$$invalidate(2, container.innerHTML = "", container);

				$$invalidate(7, wavesurfer = extension_wavesurfer_default().create({
					container,
					waveColor: "#cfcfcf",
					progressColor: "#0071e3"
				}));

				const filePath = extension_fireflysemantics_join_join($canvasSpec.filesPath, id);

				if (storybook) {
					wavesurfer.load(filePath);
				} else {
					contentsManager.readAudioContent(filePath).then(result => {
						const arrayBuffer = extension_base64ToArrayBuffer(result);
						wavesurfer.loadArrayBuffer(arrayBuffer);
					}).catch(error => {
						console.error("Unable to load the audio data", error);
					});
				}

				$$invalidate(3, playing = false);
				$$invalidate(8, oldId = id);
			}
		}
	};

	return [
		canvasSpec,
		large,
		container,
		playing,
		changePlayStatus,
		id,
		storybook,
		wavesurfer,
		oldId,
		$canvasSpec,
		click_handler,
		div0_binding
	];
}

class extension_AudioSample extends extension_SvelteComponent {
	constructor(options) {
		super();

		extension_init(this, options, extension_AudioSample_svelte_instance, extension_AudioSample_svelte_create_fragment, extension_safe_not_equal, {
			id: 5,
			canvasSpec: 0,
			large: 1,
			storybook: 6
		});
	}
}

/* harmony default export */ const extension_AudioSample_svelte = (extension_AudioSample);
// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faTable.js
var extension_faTable = __webpack_require__(7184);
;// ../../canvas_viz/dist/elements/TabularSample.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/elements/TabularSample.svelte generated by Svelte v3.59.2 */





function extension_TabularSample_svelte_create_fragment(ctx) {
	let div;
	let fa;
	let current;
	let mounted;
	let dispose;
	fa = new extension_fa_svelte({ props: { icon: extension_faTable/* faTable */.w9 } });

	return {
		c() {
			div = extension_internal_element("div");
			extension_create_component(fa.$$.fragment);
			extension_attr(div, "class", "p-2");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			extension_mount_component(fa, div, null);
			current = true;

			if (!mounted) {
				dispose = extension_listen(div, "click", /*click_handler*/ ctx[1]);
				mounted = true;
			}
		},
		p: extension_noop,
		i(local) {
			if (current) return;
			extension_transition_in(fa.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(fa.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			extension_destroy_component(fa);
			mounted = false;
			dispose();
		}
	};
}

function extension_TabularSample_svelte_instance($$self, $$props, $$invalidate) {
	let { storybook = false } = $$props;

	function click_handler(event) {
		extension_bubble.call(this, $$self, event);
	}

	$$self.$$set = $$props => {
		if ('storybook' in $$props) $$invalidate(0, storybook = $$props.storybook);
	};

	return [storybook, click_handler];
}

class extension_TabularSample extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_TabularSample_svelte_instance, extension_TabularSample_svelte_create_fragment, extension_safe_not_equal, { storybook: 0 });
	}
}

/* harmony default export */ const extension_TabularSample_svelte = (extension_TabularSample);
;// ../../canvas_viz/dist/helpers/filetype.js
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */




function extension_getComponentForType(type) {
    switch (type) {
        case extension_CanvasDataType.AUDIO:
            return extension_AudioSample_svelte;
        case extension_CanvasDataType.IMAGE:
            return extension_ImageSample_svelte;
        default:
            return extension_TabularSample_svelte;
    }
}

;// ../../canvas_viz/dist/elements/DataSampleDetail.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/elements/DataSampleDetail.svelte generated by Svelte v3.59.2 */







function extension_get_each_context(ctx, list, i) {
	const child_ctx = ctx.slice();
	child_ctx[15] = list[i][0];
	child_ctx[16] = list[i][1];
	return child_ctx;
}

// (46:0) {#if $tooltip.hover && $tooltip.instance !== undefined}
function extension_DataSampleDetail_svelte_create_if_block(ctx) {
	let div3;
	let div0;
	let switch_instance;
	let t0;
	let div2;
	let div1;
	let t1_value = /*$tooltip*/ ctx[7].instance[/*$canvasSpec*/ ctx[9].idColumn] + "";
	let t1;
	let t2;
	let t3;
	let div3_resize_listener;
	let div3_transition;
	let current;
	var switch_value = extension_getComponentForType(/*$canvasSpec*/ ctx[9].dataType);

	function switch_props(ctx) {
		return {
			props: {
				id: /*$tooltip*/ ctx[7].instance[/*$canvasSpec*/ ctx[9].idColumn],
				canvasSpec: /*canvasSpec*/ ctx[0],
				storybook: /*storybook*/ ctx[2],
				large: true
			}
		};
	}

	if (switch_value) {
		switch_instance = extension_construct_svelte_component(switch_value, switch_props(ctx));
	}

	let if_block = /*$tooltip*/ ctx[7].number !== undefined && extension_create_if_block_2(ctx);
	let each_value = Object.entries(/*$tooltip*/ ctx[7].instance);
	let each_blocks = [];

	for (let i = 0; i < each_value.length; i += 1) {
		each_blocks[i] = extension_create_each_block(extension_get_each_context(ctx, each_value, i));
	}

	return {
		c() {
			div3 = extension_internal_element("div");
			div0 = extension_internal_element("div");
			if (switch_instance) extension_create_component(switch_instance.$$.fragment);
			t0 = extension_space();
			div2 = extension_internal_element("div");
			div1 = extension_internal_element("div");
			t1 = extension_internal_text(t1_value);
			t2 = extension_space();
			if (if_block) if_block.c();
			t3 = extension_space();

			for (let i = 0; i < each_blocks.length; i += 1) {
				each_blocks[i].c();
			}

			extension_attr(div0, "class", "flex flex-shrink-0");
			extension_attr(div1, "class", "flex font-bold");
			extension_attr(div2, "class", "flex flex-col pl-2 pr-4 m-2 mt-0 break-all");
			extension_attr(div3, "class", "text-sm fixed p-1 rounded text-text-dark shadow z-10 flex mt-4 mb-4");
			extension_attr(div3, "style", /*style*/ ctx[8]);
			extension_add_render_callback(() => /*div3_elementresize_handler*/ ctx[14].call(div3));
		},
		m(target, anchor) {
			extension_insert(target, div3, anchor);
			extension_append(div3, div0);
			if (switch_instance) extension_mount_component(switch_instance, div0, null);
			extension_append(div3, t0);
			extension_append(div3, div2);
			extension_append(div2, div1);
			extension_append(div1, t1);
			extension_append(div2, t2);
			if (if_block) if_block.m(div2, null);
			extension_append(div2, t3);

			for (let i = 0; i < each_blocks.length; i += 1) {
				if (each_blocks[i]) {
					each_blocks[i].m(div2, null);
				}
			}

			div3_resize_listener = extension_add_iframe_resize_listener(div3, /*div3_elementresize_handler*/ ctx[14].bind(div3));
			current = true;
		},
		p(ctx, dirty) {
			const switch_instance_changes = {};
			if (dirty & /*$tooltip, $canvasSpec*/ 640) switch_instance_changes.id = /*$tooltip*/ ctx[7].instance[/*$canvasSpec*/ ctx[9].idColumn];
			if (dirty & /*canvasSpec*/ 1) switch_instance_changes.canvasSpec = /*canvasSpec*/ ctx[0];
			if (dirty & /*storybook*/ 4) switch_instance_changes.storybook = /*storybook*/ ctx[2];

			if (dirty & /*$canvasSpec*/ 512 && switch_value !== (switch_value = extension_getComponentForType(/*$canvasSpec*/ ctx[9].dataType))) {
				if (switch_instance) {
					extension_group_outros();
					const old_component = switch_instance;

					extension_transition_out(old_component.$$.fragment, 1, 0, () => {
						extension_destroy_component(old_component, 1);
					});

					extension_check_outros();
				}

				if (switch_value) {
					switch_instance = extension_construct_svelte_component(switch_value, switch_props(ctx));
					extension_create_component(switch_instance.$$.fragment);
					extension_transition_in(switch_instance.$$.fragment, 1);
					extension_mount_component(switch_instance, div0, null);
				} else {
					switch_instance = null;
				}
			} else if (switch_value) {
				switch_instance.$set(switch_instance_changes);
			}

			if ((!current || dirty & /*$tooltip, $canvasSpec*/ 640) && t1_value !== (t1_value = /*$tooltip*/ ctx[7].instance[/*$canvasSpec*/ ctx[9].idColumn] + "")) extension_set_data(t1, t1_value);

			if (/*$tooltip*/ ctx[7].number !== undefined) {
				if (if_block) {
					if_block.p(ctx, dirty);

					if (dirty & /*$tooltip*/ 128) {
						extension_transition_in(if_block, 1);
					}
				} else {
					if_block = extension_create_if_block_2(ctx);
					if_block.c();
					extension_transition_in(if_block, 1);
					if_block.m(div2, t3);
				}
			} else if (if_block) {
				extension_group_outros();

				extension_transition_out(if_block, 1, 1, () => {
					if_block = null;
				});

				extension_check_outros();
			}

			if (dirty & /*formatValue, Object, $tooltip, $canvasSpec*/ 1664) {
				each_value = Object.entries(/*$tooltip*/ ctx[7].instance);
				let i;

				for (i = 0; i < each_value.length; i += 1) {
					const child_ctx = extension_get_each_context(ctx, each_value, i);

					if (each_blocks[i]) {
						each_blocks[i].p(child_ctx, dirty);
					} else {
						each_blocks[i] = extension_create_each_block(child_ctx);
						each_blocks[i].c();
						each_blocks[i].m(div2, null);
					}
				}

				for (; i < each_blocks.length; i += 1) {
					each_blocks[i].d(1);
				}

				each_blocks.length = each_value.length;
			}

			if (!current || dirty & /*style*/ 256) {
				extension_attr(div3, "style", /*style*/ ctx[8]);
			}
		},
		i(local) {
			if (current) return;
			if (switch_instance) extension_transition_in(switch_instance.$$.fragment, local);
			extension_transition_in(if_block);

			extension_add_render_callback(() => {
				if (!current) return;
				if (!div3_transition) div3_transition = extension_create_bidirectional_transition(div3, extension_fade, {}, true);
				div3_transition.run(1);
			});

			current = true;
		},
		o(local) {
			if (switch_instance) extension_transition_out(switch_instance.$$.fragment, local);
			extension_transition_out(if_block);
			if (!div3_transition) div3_transition = extension_create_bidirectional_transition(div3, extension_fade, {}, false);
			div3_transition.run(0);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div3);
			if (switch_instance) extension_destroy_component(switch_instance);
			if (if_block) if_block.d();
			extension_destroy_each(each_blocks, detaching);
			div3_resize_listener();
			if (detaching && div3_transition) div3_transition.end();
		}
	};
}

// (67:6) {#if $tooltip.number !== undefined}
function extension_create_if_block_2(ctx) {
	let div;
	let fa;
	let t0;
	let span;
	let t1_value = /*$tooltip*/ ctx[7].number + "";
	let t1;
	let current;
	fa = new extension_fa_svelte({ props: { icon: extension_faChartBar/* faChartBar */.$F } });

	return {
		c() {
			div = extension_internal_element("div");
			extension_create_component(fa.$$.fragment);
			t0 = extension_space();
			span = extension_internal_element("span");
			t1 = extension_internal_text(t1_value);
			extension_attr(span, "class", "ml-2");
			extension_attr(div, "class", "flex flex-nowrap");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			extension_mount_component(fa, div, null);
			extension_append(div, t0);
			extension_append(div, span);
			extension_append(span, t1);
			current = true;
		},
		p(ctx, dirty) {
			if ((!current || dirty & /*$tooltip*/ 128) && t1_value !== (t1_value = /*$tooltip*/ ctx[7].number + "")) extension_set_data(t1, t1_value);
		},
		i(local) {
			if (current) return;
			extension_transition_in(fa.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(fa.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			extension_destroy_component(fa);
		}
	};
}

// (74:8) {#if key !== $canvasSpec.idColumn && !key.startsWith("familiarity_") && !key.startsWith("duplicates_") && !key.startsWith("projection_") && !key.startsWith("splitFamiliarity")}
function extension_DataSampleDetail_svelte_create_if_block_1(ctx) {
	let div;
	let span0;
	let t0_value = /*key*/ ctx[15] + "";
	let t0;
	let t1;
	let t2;
	let span1;
	let t3_value = /*formatValue*/ ctx[10](/*val*/ ctx[16]) + "";
	let t3;
	let t4;

	return {
		c() {
			div = extension_internal_element("div");
			span0 = extension_internal_element("span");
			t0 = extension_internal_text(t0_value);
			t1 = extension_internal_text(":");
			t2 = extension_space();
			span1 = extension_internal_element("span");
			t3 = extension_internal_text(t3_value);
			t4 = extension_space();
			extension_attr(span0, "class", "font-bold");
			extension_attr(span1, "class", "ml-2");
			extension_attr(div, "class", "flex flex-nowrap");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			extension_append(div, span0);
			extension_append(span0, t0);
			extension_append(span0, t1);
			extension_append(div, t2);
			extension_append(div, span1);
			extension_append(span1, t3);
			extension_append(div, t4);
		},
		p(ctx, dirty) {
			if (dirty & /*$tooltip*/ 128 && t0_value !== (t0_value = /*key*/ ctx[15] + "")) extension_set_data(t0, t0_value);
			if (dirty & /*$tooltip*/ 128 && t3_value !== (t3_value = /*formatValue*/ ctx[10](/*val*/ ctx[16]) + "")) extension_set_data(t3, t3_value);
		},
		d(detaching) {
			if (detaching) extension_detach(div);
		}
	};
}

// (73:6) {#each Object.entries($tooltip.instance) as [key, val]}
function extension_create_each_block(ctx) {
	let show_if = /*key*/ ctx[15] !== /*$canvasSpec*/ ctx[9].idColumn && !/*key*/ ctx[15].startsWith("familiarity_") && !/*key*/ ctx[15].startsWith("duplicates_") && !/*key*/ ctx[15].startsWith("projection_") && !/*key*/ ctx[15].startsWith("splitFamiliarity");
	let if_block_anchor;
	let if_block = show_if && extension_DataSampleDetail_svelte_create_if_block_1(ctx);

	return {
		c() {
			if (if_block) if_block.c();
			if_block_anchor = extension_empty();
		},
		m(target, anchor) {
			if (if_block) if_block.m(target, anchor);
			extension_insert(target, if_block_anchor, anchor);
		},
		p(ctx, dirty) {
			if (dirty & /*$tooltip, $canvasSpec*/ 640) show_if = /*key*/ ctx[15] !== /*$canvasSpec*/ ctx[9].idColumn && !/*key*/ ctx[15].startsWith("familiarity_") && !/*key*/ ctx[15].startsWith("duplicates_") && !/*key*/ ctx[15].startsWith("projection_") && !/*key*/ ctx[15].startsWith("splitFamiliarity");

			if (show_if) {
				if (if_block) {
					if_block.p(ctx, dirty);
				} else {
					if_block = extension_DataSampleDetail_svelte_create_if_block_1(ctx);
					if_block.c();
					if_block.m(if_block_anchor.parentNode, if_block_anchor);
				}
			} else if (if_block) {
				if_block.d(1);
				if_block = null;
			}
		},
		d(detaching) {
			if (if_block) if_block.d(detaching);
			if (detaching) extension_detach(if_block_anchor);
		}
	};
}

function extension_DataSampleDetail_svelte_create_fragment(ctx) {
	let if_block_anchor;
	let current;
	let mounted;
	let dispose;
	extension_add_render_callback(/*onwindowresize*/ ctx[13]);
	let if_block = /*$tooltip*/ ctx[7].hover && /*$tooltip*/ ctx[7].instance !== undefined && extension_DataSampleDetail_svelte_create_if_block(ctx);

	return {
		c() {
			if (if_block) if_block.c();
			if_block_anchor = extension_empty();
		},
		m(target, anchor) {
			if (if_block) if_block.m(target, anchor);
			extension_insert(target, if_block_anchor, anchor);
			current = true;

			if (!mounted) {
				dispose = extension_listen(window, "resize", /*onwindowresize*/ ctx[13]);
				mounted = true;
			}
		},
		p(ctx, [dirty]) {
			if (/*$tooltip*/ ctx[7].hover && /*$tooltip*/ ctx[7].instance !== undefined) {
				if (if_block) {
					if_block.p(ctx, dirty);

					if (dirty & /*$tooltip*/ 128) {
						extension_transition_in(if_block, 1);
					}
				} else {
					if_block = extension_DataSampleDetail_svelte_create_if_block(ctx);
					if_block.c();
					extension_transition_in(if_block, 1);
					if_block.m(if_block_anchor.parentNode, if_block_anchor);
				}
			} else if (if_block) {
				extension_group_outros();

				extension_transition_out(if_block, 1, 1, () => {
					if_block = null;
				});

				extension_check_outros();
			}
		},
		i(local) {
			if (current) return;
			extension_transition_in(if_block);
			current = true;
		},
		o(local) {
			extension_transition_out(if_block);
			current = false;
		},
		d(detaching) {
			if (if_block) if_block.d(detaching);
			if (detaching) extension_detach(if_block_anchor);
			mounted = false;
			dispose();
		}
	};
}

function extension_DataSampleDetail_svelte_instance($$self, $$props, $$invalidate) {
	let yPos;
	let xStyle;
	let style;

	let $tooltip,
		$$unsubscribe_tooltip = extension_noop,
		$$subscribe_tooltip = () => ($$unsubscribe_tooltip(), $$unsubscribe_tooltip = extension_subscribe(tooltip, $$value => $$invalidate(7, $tooltip = $$value)), tooltip);

	let $canvasSpec,
		$$unsubscribe_canvasSpec = extension_noop,
		$$subscribe_canvasSpec = () => ($$unsubscribe_canvasSpec(), $$unsubscribe_canvasSpec = extension_subscribe(canvasSpec, $$value => $$invalidate(9, $canvasSpec = $$value)), canvasSpec);

	$$self.$$.on_destroy.push(() => $$unsubscribe_tooltip());
	$$self.$$.on_destroy.push(() => $$unsubscribe_canvasSpec());

	const formatValue = val => {
		if (Array.isArray(val)) return val.toString();
		if (typeof val === 'number') return val.toFixed(2);
		return val;
	};

	let { canvasSpec } = $$props;
	$$subscribe_canvasSpec();
	let { tooltip } = $$props;
	$$subscribe_tooltip();
	let { storybook = false } = $$props;
	let windowWidth = 0;
	let windowHeight = 0;
	let tooltipWidth = 0;
	let tooltipHeight = 0;

	function onwindowresize() {
		$$invalidate(3, windowWidth = window.innerWidth)
		$$invalidate(4, windowHeight = window.innerHeight)
	}

	function div3_elementresize_handler() {
		tooltipWidth = this.offsetWidth;
		tooltipHeight = this.offsetHeight;
		$$invalidate(5, tooltipWidth);
		$$invalidate(6, tooltipHeight);
	}

	$$self.$$set = $$props => {
		if ('canvasSpec' in $$props) $$subscribe_canvasSpec($$invalidate(0, canvasSpec = $$props.canvasSpec));
		if ('tooltip' in $$props) $$subscribe_tooltip($$invalidate(1, tooltip = $$props.tooltip));
		if ('storybook' in $$props) $$invalidate(2, storybook = $$props.storybook);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*windowHeight, $tooltip, tooltipHeight*/ 208) {
			$: $$invalidate(12, yPos = windowHeight > $tooltip.mousePos.y + tooltipHeight
			? $tooltip.mousePos.y
			: $tooltip.mousePos.y - tooltipHeight - 20);
		}

		if ($$self.$$.dirty & /*windowWidth, $tooltip, tooltipWidth*/ 168) {
			$: $$invalidate(11, xStyle = windowWidth > $tooltip.mousePos.x + tooltipWidth + 10
			? `left: ${$tooltip.mousePos.x}px;`
			: `right: 10px;`);
		}

		if ($$self.$$.dirty & /*yPos, xStyle*/ 6144) {
			$: $$invalidate(8, style = `top: ${yPos}px; ${xStyle}; background: black`);
		}
	};

	return [
		canvasSpec,
		tooltip,
		storybook,
		windowWidth,
		windowHeight,
		tooltipWidth,
		tooltipHeight,
		$tooltip,
		style,
		$canvasSpec,
		formatValue,
		xStyle,
		yPos,
		onwindowresize,
		div3_elementresize_handler
	];
}

class extension_DataSampleDetail extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_DataSampleDetail_svelte_instance, extension_DataSampleDetail_svelte_create_fragment, extension_safe_not_equal, { canvasSpec: 0, tooltip: 1, storybook: 2 });
	}
}

/* harmony default export */ const extension_DataSampleDetail_svelte = (extension_DataSampleDetail);
;// ../../canvas_viz/dist/JupyterWidget.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/JupyterWidget.svelte generated by Svelte v3.59.2 */






function extension_JupyterWidget_svelte_create_else_block(ctx) {
	let t;

	return {
		c() {
			t = extension_internal_text("No data to show.");
		},
		m(target, anchor) {
			extension_insert(target, t, anchor);
		},
		p: extension_noop,
		i: extension_noop,
		o: extension_noop,
		d(detaching) {
			if (detaching) extension_detach(t);
		}
	};
}

// (28:0) {#if $table && $widgetSpec}
function extension_JupyterWidget_svelte_create_if_block(ctx) {
	let div;
	let switch_instance;
	let div_class_value;
	let current;
	var switch_value = /*widget*/ ctx[0];

	function switch_props(ctx) {
		return {
			props: {
				widgetSpec: /*$widgetSpec*/ ctx[2],
				selected: extension_selected,
				filter: extension_stores_filter,
				groupColumns: extension_groupColumns,
				groupNames: extension_groupNames,
				canvasSpec: extension_canvasSpec,
				dataTable: extension_dataTable,
				filterError: extension_filterError,
				tooltip: extension_tooltip,
				table: extension_stores_table,
				filteredTable: extension_filteredTable,
				groupedTables: extension_groupedTables,
				notebook: true
			}
		};
	}

	if (switch_value) {
		switch_instance = extension_construct_svelte_component(switch_value, switch_props(ctx));
		switch_instance.$on("specChanged", /*handleSpecChanged*/ ctx[4]);
	}

	return {
		c() {
			div = extension_internal_element("div");
			if (switch_instance) extension_create_component(switch_instance.$$.fragment);

			extension_attr(div, "class", div_class_value = "" + ((/*$widgetSpec*/ ctx[2].name === 'toolbar'
			? 'border-midgrey border-2'
			: '') + " mt-2 h-full"));

			extension_set_style(div, "min-height", "350px");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			if (switch_instance) extension_mount_component(switch_instance, div, null);
			current = true;
		},
		p(ctx, dirty) {
			const switch_instance_changes = {};
			if (dirty & /*$widgetSpec*/ 4) switch_instance_changes.widgetSpec = /*$widgetSpec*/ ctx[2];

			if (dirty & /*widget*/ 1 && switch_value !== (switch_value = /*widget*/ ctx[0])) {
				if (switch_instance) {
					extension_group_outros();
					const old_component = switch_instance;

					extension_transition_out(old_component.$$.fragment, 1, 0, () => {
						extension_destroy_component(old_component, 1);
					});

					extension_check_outros();
				}

				if (switch_value) {
					switch_instance = extension_construct_svelte_component(switch_value, switch_props(ctx));
					switch_instance.$on("specChanged", /*handleSpecChanged*/ ctx[4]);
					extension_create_component(switch_instance.$$.fragment);
					extension_transition_in(switch_instance.$$.fragment, 1);
					extension_mount_component(switch_instance, div, null);
				} else {
					switch_instance = null;
				}
			} else if (switch_value) {
				switch_instance.$set(switch_instance_changes);
			}

			if (!current || dirty & /*$widgetSpec*/ 4 && div_class_value !== (div_class_value = "" + ((/*$widgetSpec*/ ctx[2].name === 'toolbar'
			? 'border-midgrey border-2'
			: '') + " mt-2 h-full"))) {
				extension_attr(div, "class", div_class_value);
			}
		},
		i(local) {
			if (current) return;
			if (switch_instance) extension_transition_in(switch_instance.$$.fragment, local);
			current = true;
		},
		o(local) {
			if (switch_instance) extension_transition_out(switch_instance.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			if (switch_instance) extension_destroy_component(switch_instance);
		}
	};
}

function extension_JupyterWidget_svelte_create_fragment(ctx) {
	let current_block_type_index;
	let if_block;
	let t;
	let datasampledetail;
	let current;
	const if_block_creators = [extension_JupyterWidget_svelte_create_if_block, extension_JupyterWidget_svelte_create_else_block];
	const if_blocks = [];

	function select_block_type(ctx, dirty) {
		if (/*$table*/ ctx[1] && /*$widgetSpec*/ ctx[2]) return 0;
		return 1;
	}

	current_block_type_index = select_block_type(ctx, -1);
	if_block = if_blocks[current_block_type_index] = if_block_creators[current_block_type_index](ctx);
	datasampledetail = new extension_DataSampleDetail_svelte({ props: { tooltip: extension_tooltip, canvasSpec: extension_canvasSpec } });

	return {
		c() {
			if_block.c();
			t = extension_space();
			extension_create_component(datasampledetail.$$.fragment);
		},
		m(target, anchor) {
			if_blocks[current_block_type_index].m(target, anchor);
			extension_insert(target, t, anchor);
			extension_mount_component(datasampledetail, target, anchor);
			current = true;
		},
		p(ctx, [dirty]) {
			let previous_block_index = current_block_type_index;
			current_block_type_index = select_block_type(ctx, dirty);

			if (current_block_type_index === previous_block_index) {
				if_blocks[current_block_type_index].p(ctx, dirty);
			} else {
				extension_group_outros();

				extension_transition_out(if_blocks[previous_block_index], 1, 1, () => {
					if_blocks[previous_block_index] = null;
				});

				extension_check_outros();
				if_block = if_blocks[current_block_type_index];

				if (!if_block) {
					if_block = if_blocks[current_block_type_index] = if_block_creators[current_block_type_index](ctx);
					if_block.c();
				} else {
					if_block.p(ctx, dirty);
				}

				extension_transition_in(if_block, 1);
				if_block.m(t.parentNode, t);
			}
		},
		i(local) {
			if (current) return;
			extension_transition_in(if_block);
			extension_transition_in(datasampledetail.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(if_block);
			extension_transition_out(datasampledetail.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if_blocks[current_block_type_index].d(detaching);
			if (detaching) extension_detach(t);
			extension_destroy_component(datasampledetail, detaching);
		}
	};
}

function extension_JupyterWidget_svelte_instance($$self, $$props, $$invalidate) {
	let $table;
	let $widgetSpec;
	extension_component_subscribe($$self, extension_stores_table, $$value => $$invalidate(1, $table = $$value));
	let { model } = $$props;
	let { widget } = $$props;
	extension_initializeStores(model);
	let widgetSpec = extension_widgetWritable("widget_spec", model.attributes.widget_spec);
	extension_component_subscribe($$self, widgetSpec, value => $$invalidate(2, $widgetSpec = value));
	widgetSpec.setModel(model);

	function handleSpecChanged(event) {
		widgetSpec.set(event.detail.spec);
	}

	$$self.$$set = $$props => {
		if ('model' in $$props) $$invalidate(5, model = $$props.model);
		if ('widget' in $$props) $$invalidate(0, widget = $$props.widget);
	};

	return [widget, $table, $widgetSpec, widgetSpec, handleSpecChanged, model];
}

class extension_JupyterWidget extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_JupyterWidget_svelte_instance, extension_JupyterWidget_svelte_create_fragment, extension_safe_not_equal, { model: 5, widget: 0 });
	}
}

/* harmony default export */ const extension_JupyterWidget_svelte = (extension_JupyterWidget);
// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faEdit.js
var extension_faEdit = __webpack_require__(2174);
// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faCheck.js
var extension_faCheck = __webpack_require__(2888);
// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faTimes.js
var extension_faTimes = __webpack_require__(7882);
// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faQuestionCircle.js
var extension_faQuestionCircle = __webpack_require__(3430);
;// ../../canvas_viz/dist/elements/Tooltip.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/elements/Tooltip.svelte generated by Svelte v3.59.2 */






function extension_Tooltip_svelte_add_css(target) {
	extension_append_styles(target, "svelte-49ae0e", "[data-tooltip].svelte-49ae0e{position:relative;z-index:2;display:block}[data-tooltip].svelte-49ae0e:before,[data-tooltip].svelte-49ae0e:after{visibility:hidden;opacity:0;pointer-events:none;transition:0.2s ease-out;transform:translate(-50%, 5px)}[data-tooltip].svelte-49ae0e:before{position:absolute;top:100%;left:50%;margin-bottom:5px;padding:7px;width:100%;min-width:300px;max-width:400px;border-radius:3px;background-color:#000;background-color:hsla(0, 0%, 20%, 0.9);color:#fff;content:attr(data-tooltip);text-align:center;font-size:14px;line-height:1.2;transition:0.2s ease-out}[data-tooltip].svelte-49ae0e:hover:before,[data-tooltip].svelte-49ae0e:hover:after{visibility:visible;opacity:1;transform:translate(-50%, 0)}[data-tooltip=\"false\"].svelte-49ae0e:hover:before,[data-tooltip=\"false\"].svelte-49ae0e:hover:after{visibility:hidden;opacity:0}");
}

function extension_Tooltip_svelte_create_fragment(ctx) {
	let div;
	let fa;
	let current;
	fa = new extension_fa_svelte({ props: { icon: extension_faQuestionCircle/* faQuestionCircle */.wR } });

	return {
		c() {
			div = extension_internal_element("div");
			extension_create_component(fa.$$.fragment);
			extension_attr(div, "class", "w-max svelte-49ae0e");
			extension_attr(div, "data-tooltip", /*text*/ ctx[0]);
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			extension_mount_component(fa, div, null);
			current = true;
		},
		p(ctx, [dirty]) {
			if (!current || dirty & /*text*/ 1) {
				extension_attr(div, "data-tooltip", /*text*/ ctx[0]);
			}
		},
		i(local) {
			if (current) return;
			extension_transition_in(fa.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(fa.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			extension_destroy_component(fa);
		}
	};
}

function extension_Tooltip_svelte_instance($$self, $$props, $$invalidate) {
	let { text } = $$props;

	$$self.$$set = $$props => {
		if ('text' in $$props) $$invalidate(0, text = $$props.text);
	};

	return [text];
}

class extension_Tooltip extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_Tooltip_svelte_instance, extension_Tooltip_svelte_create_fragment, extension_safe_not_equal, { text: 0 }, extension_Tooltip_svelte_add_css);
	}
}

/* harmony default export */ const extension_Tooltip_svelte = (extension_Tooltip);
;// ../../canvas_viz/dist/elements/Heading.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/elements/Heading.svelte generated by Svelte v3.59.2 */




function extension_Heading_svelte_create_fragment(ctx) {
	let div1;
	let div0;
	let h2;
	let t0;
	let t1;
	let tooltip;
	let current;
	tooltip = new extension_Tooltip_svelte({ props: { text: /*description*/ ctx[1] } });

	return {
		c() {
			div1 = extension_internal_element("div");
			div0 = extension_internal_element("div");
			h2 = extension_internal_element("h2");
			t0 = extension_internal_text(/*heading*/ ctx[0]);
			t1 = extension_space();
			extension_create_component(tooltip.$$.fragment);
			extension_attr(h2, "class", "text-2xl font-bold leading-7 text-gray-900 pr-2");
			extension_attr(div0, "class", "flex items-center");
			extension_attr(div1, "class", "flex items-center justify-between pb-3 pr-4");
		},
		m(target, anchor) {
			extension_insert(target, div1, anchor);
			extension_append(div1, div0);
			extension_append(div0, h2);
			extension_append(h2, t0);
			extension_append(div0, t1);
			extension_mount_component(tooltip, div0, null);
			current = true;
		},
		p(ctx, [dirty]) {
			if (!current || dirty & /*heading*/ 1) extension_set_data(t0, /*heading*/ ctx[0]);
			const tooltip_changes = {};
			if (dirty & /*description*/ 2) tooltip_changes.text = /*description*/ ctx[1];
			tooltip.$set(tooltip_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(tooltip.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(tooltip.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div1);
			extension_destroy_component(tooltip);
		}
	};
}

let extension_hover = false;
let extension_offsetX = 0;

function extension_Heading_svelte_instance($$self, $$props, $$invalidate) {
	let { heading } = $$props;
	let { description } = $$props;

	$$self.$$set = $$props => {
		if ('heading' in $$props) $$invalidate(0, heading = $$props.heading);
		if ('description' in $$props) $$invalidate(1, description = $$props.description);
	};

	return [heading, description];
}

class extension_Heading extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_Heading_svelte_instance, extension_Heading_svelte_create_fragment, extension_safe_not_equal, { heading: 0, description: 1 });
	}
}

/* harmony default export */ const extension_Heading_svelte = (extension_Heading);
// EXTERNAL MODULE: ../../node_modules/html2canvas/dist/html2canvas.js
var extension_html2canvas = __webpack_require__(8317);
var extension_html2canvas_default = /*#__PURE__*/__webpack_require__.n(extension_html2canvas);
;// ../../canvas_viz/dist/helpers/export.js
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

function extension_exportView(container, name) {
    extension_html2canvas_default()(container).then((canvas) => {
        const a = document.createElement("a");
        a.href = canvas
            .toDataURL("image/jpeg")
            .replace("image/jpeg", "image/octet-stream");
        a.download = `${name}.jpg`;
        a.click();
    });
}

// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faImage.js
var extension_faImage = __webpack_require__(6705);
;// ../../canvas_viz/dist/elements/ComponentHeader.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/elements/ComponentHeader.svelte generated by Svelte v3.59.2 */








function extension_ComponentHeader_svelte_create_icon_slot(ctx) {
	let fa;
	let current;
	fa = new extension_fa_svelte({ props: { icon: extension_faImage/* faImage */.jb, slot: "icon" } });

	return {
		c() {
			extension_create_component(fa.$$.fragment);
		},
		m(target, anchor) {
			extension_mount_component(fa, target, anchor);
			current = true;
		},
		p: extension_noop,
		i(local) {
			if (current) return;
			extension_transition_in(fa.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(fa.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			extension_destroy_component(fa, detaching);
		}
	};
}

// (35:6) 
function extension_create_text_slot(ctx) {
	let span;

	return {
		c() {
			span = extension_internal_element("span");
			span.textContent = "Download";
			extension_attr(span, "slot", "text");
		},
		m(target, anchor) {
			extension_insert(target, span, anchor);
		},
		p: extension_noop,
		d(detaching) {
			if (detaching) extension_detach(span);
		}
	};
}

function extension_ComponentHeader_svelte_create_fragment(ctx) {
	let div3;
	let div1;
	let heading;
	let t0;
	let div0;
	let t1;
	let div2;
	let iconbutton;
	let current;

	heading = new extension_Heading_svelte({
			props: {
				heading: /*title*/ ctx[0],
				description: /*description*/ ctx[1]
			}
		});

	const default_slot_template = /*#slots*/ ctx[3].default;
	const default_slot = extension_create_slot(default_slot_template, ctx, /*$$scope*/ ctx[5], null);

	iconbutton = new extension_IconButton_svelte({
			props: {
				$$slots: {
					text: [extension_create_text_slot],
					icon: [extension_ComponentHeader_svelte_create_icon_slot]
				},
				$$scope: { ctx }
			}
		});

	iconbutton.$on("click", /*click_handler*/ ctx[4]);

	return {
		c() {
			div3 = extension_internal_element("div");
			div1 = extension_internal_element("div");
			extension_create_component(heading.$$.fragment);
			t0 = extension_space();
			div0 = extension_internal_element("div");
			if (default_slot) default_slot.c();
			t1 = extension_space();
			div2 = extension_internal_element("div");
			extension_create_component(iconbutton.$$.fragment);
			extension_attr(div0, "class", "flex flex-wrap");
			extension_attr(div1, "class", "flex flex-wrap");
			extension_attr(div2, "class", "pb-3 pl-3");
			extension_attr(div3, "class", "flex items-top justify-between");
		},
		m(target, anchor) {
			extension_insert(target, div3, anchor);
			extension_append(div3, div1);
			extension_mount_component(heading, div1, null);
			extension_append(div1, t0);
			extension_append(div1, div0);

			if (default_slot) {
				default_slot.m(div0, null);
			}

			extension_append(div3, t1);
			extension_append(div3, div2);
			extension_mount_component(iconbutton, div2, null);
			current = true;
		},
		p(ctx, [dirty]) {
			const heading_changes = {};
			if (dirty & /*title*/ 1) heading_changes.heading = /*title*/ ctx[0];
			if (dirty & /*description*/ 2) heading_changes.description = /*description*/ ctx[1];
			heading.$set(heading_changes);

			if (default_slot) {
				if (default_slot.p && (!current || dirty & /*$$scope*/ 32)) {
					extension_update_slot_base(
						default_slot,
						default_slot_template,
						ctx,
						/*$$scope*/ ctx[5],
						!current
						? extension_get_all_dirty_from_scope(/*$$scope*/ ctx[5])
						: extension_get_slot_changes(default_slot_template, /*$$scope*/ ctx[5], dirty, null),
						null
					);
				}
			}

			const iconbutton_changes = {};

			if (dirty & /*$$scope*/ 32) {
				iconbutton_changes.$$scope = { dirty, ctx };
			}

			iconbutton.$set(iconbutton_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(heading.$$.fragment, local);
			extension_transition_in(default_slot, local);
			extension_transition_in(iconbutton.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(heading.$$.fragment, local);
			extension_transition_out(default_slot, local);
			extension_transition_out(iconbutton.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div3);
			extension_destroy_component(heading);
			if (default_slot) default_slot.d(detaching);
			extension_destroy_component(iconbutton);
		}
	};
}

function extension_ComponentHeader_svelte_instance($$self, $$props, $$invalidate) {
	let { $$slots: slots = {}, $$scope } = $$props;
	let { title } = $$props;
	let { description } = $$props;
	let { container } = $$props;
	const click_handler = () => extension_exportView(container, "Scatterplot");

	$$self.$$set = $$props => {
		if ('title' in $$props) $$invalidate(0, title = $$props.title);
		if ('description' in $$props) $$invalidate(1, description = $$props.description);
		if ('container' in $$props) $$invalidate(2, container = $$props.container);
		if ('$$scope' in $$props) $$invalidate(5, $$scope = $$props.$$scope);
	};

	return [title, description, container, slots, click_handler, $$scope];
}

class extension_ComponentHeader extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_ComponentHeader_svelte_instance, extension_ComponentHeader_svelte_create_fragment, extension_safe_not_equal, { title: 0, description: 1, container: 2 });
	}
}

/* harmony default export */ const extension_ComponentHeader_svelte = (extension_ComponentHeader);
;// ../../canvas_viz/dist/helpers/dimensions.js
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
function extension_mapWidth(width) {
    switch (width) {
        case 'XS':
            return 'col-span-1';
        case 'S':
            return 'col-span-2';
        case 'M':
            return 'col-span-3';
        case 'L':
            return 'col-span-4';
        case 'XL':
            return 'col-span-5';
        case 'XXL':
            return 'col-span-6';
        default:
            return 'col-span-2';
    }
}
function extension_mapHeight(height, grid = false) {
    switch (height) {
        case 'XS':
            return grid ? 'row-span-1' : 'max-h-XS';
        case 'S':
            return grid ? 'row-span-2' : 'max-h-S';
        case 'M':
            return grid ? 'row-span-3' : 'max-h-M';
        case 'L':
            return grid ? 'row-span-4' : 'max-h-L';
        case 'XL':
            return grid ? 'row-span-5' : 'max-h-XL';
        case 'XXL':
            return grid ? 'row-span-6' : 'max-h-XXL';
        default:
            return grid ? 'row-span-2' : 'max-h-S';
    }
}
function extension_mapHeightFixed(height, grid = false) {
    switch (height) {
        case 'XS':
            return grid ? 'row-span-1' : 'h-XS';
        case 'S':
            return grid ? 'row-span-2' : 'h-S';
        case 'M':
            return grid ? 'row-span-3' : 'h-M';
        case 'L':
            return grid ? 'row-span-4' : 'h-L';
        case 'XL':
            return grid ? 'row-span-5' : 'h-XL';
        case 'XXL':
            return grid ? 'row-span-6' : 'h-XXL';
        default:
            return grid ? 'row-span-2' : 'h-S';
    }
}

// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faAlignJustify.js
var extension_faAlignJustify = __webpack_require__(4733);
// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faListOl.js
var extension_faListOl = __webpack_require__(3801);
// EXTERNAL MODULE: ../../node_modules/@fortawesome/free-solid-svg-icons/faLayerGroup.js
var extension_faLayerGroup = __webpack_require__(9718);
;// ./src/summarySpecs.ts
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */






function extension_extractColumnElements(table) {
    const summaryElements = [];
    summaryElements.push({
        name: '# of Instances',
        data: table.numRows(),
    });
    const colNames = table.columnNames();
    for (const colName of colNames) {
        const columnType = extension_getColumnType(table, colName);
        if (columnType === 'number') {
            if (colName.startsWith('duplicates_')) {
                summaryElements.push(extension_getTotalNonNegativeElements(colName, table));
            }
            else if (!colName.startsWith('projection_')) {
                summaryElements.push({
                    name: colName,
                    data: {
                        spec: extension_getNumberColumnSpec(colName),
                        data: { values: 'arrow_table' },
                        resolver: {
                            type: extension_ResolverType.NUMBER,
                            columnName: colName,
                        },
                    },
                });
            }
        }
        else if (columnType === 'string') {
            if (extension_isStringColumnBinnable(colName, table)) {
                summaryElements.unshift({
                    name: colName,
                    data: {
                        spec: extension_getBinnedStringColumnSpec(colName),
                        data: { values: 'arrow_table' },
                        resolver: {
                            type: extension_ResolverType.BINNED_STRING,
                            columnName: colName,
                        },
                    },
                });
            }
        }
    }
    return summaryElements;
}
function extension_getQueryTree(table) {
    return {
        name: 'init',
        next: [extension_tableQueryElement, ...extension_getQueryElementsFromTable(table)],
    };
}
function extension_getNumberColumnSpec(columnName) {
    return {
        $schema: 'https://vega.github.io/schema/vega-lite/v5.json',
        title: `${columnName} binned`,
        data: { values: 'values' },
        mark: { type: 'bar', tooltip: true },
        encoding: {
            x: {
                field: 'bin_0',
                title: 'value',
            },
            y: { field: 'count', type: 'quantitative', title: 'instances' },
        },
    };
}
function extension_getBinnedStringColumnSpec(columnName) {
    return {
        $schema: 'https://vega.github.io/schema/vega-lite/v5.json',
        title: `${columnName} distribution`,
        data: { name: 'values' },
        mark: { type: 'bar', tooltip: true, cursor: 'pointer' },
        encoding: {
            y: { field: columnName, type: 'nominal', sort: '-x' },
            x: {
                field: 'count',
                type: 'quantitative',
                title: 'instances',
            },
        },
    };
}
function extension_getQueryElementsFromTable(table) {
    const elements = [];
    for (const columnName of table.columnNames()) {
        const type = extension_getColumnType(table, columnName);
        switch (type) {
            case 'number':
                elements.push(extension_getNumberQueryElement(table, columnName));
                break;
            case 'string':
                if (extension_isStringColumnBinnable(columnName, table)) {
                    elements.push(extension_getStringQueryElement(table, columnName));
                }
                break;
            case 'array':
                if (extension_getBinnableStringColumns(table).length > 0) {
                    elements.push(extension_getArrayQueryElement(table, columnName));
                }
                break;
            default:
                break;
        }
    }
    return elements;
}
const extension_tableQueryElement = {
    name: 'table',
    icon: extension_faTable/* faTable */.w9,
    next: [
        {
            name: 'numRows',
            next: (names, table) => {
                return { name: '# of Instances', data: table.numRows() };
            },
        },
    ],
};
function extension_getNumberQueryElement(table, columnName) {
    return {
        name: columnName,
        icon: extension_faListOl/* faListOl */.Ts,
        next: [
            {
                name: 'histogram',
                next: (names, table) => {
                    return {
                        name: columnName,
                        data: {
                            spec: extension_getNumberColumnSpec(columnName),
                            data: { values: 'arrow_table' },
                            resolver: {
                                type: extension_ResolverType.NUMBER,
                                columnName: columnName,
                            },
                        },
                    };
                },
            },
            {
                name: 'non-negative',
                next: extension_getNonNegativeNumberQueryElements(table),
            },
        ],
    };
}
function extension_getNonNegativeNumberQueryElements(table) {
    const elements = [];
    elements.push({
        name: 'total',
        next: (names, table) => extension_getTotalNonNegativeElements(names[0], table),
    });
    for (const column of extension_getBinnableStringColumns(table)) {
        elements.push({
            name: `by ${column}`,
            next: (names, table) => {
                return {
                    name: 'Nonempty List',
                    data: {
                        spec: {
                            $schema: 'https://vega.github.io/schema/vega-lite/v5.json',
                            title: `${names[0]} per ${column}`,
                            description: `Bar chart visualizing the distribution of ${names[0]} per ${column}.`,
                            transform: [
                                {
                                    filter: `datum.${names[0]} >= 0`,
                                },
                            ],
                            data: { name: 'values' },
                            mark: { type: 'bar', tooltip: true },
                            encoding: {
                                y: { field: column, type: 'nominal', title: column },
                                x: {
                                    aggregate: 'count',
                                    type: 'quantitative',
                                    title: names[0],
                                },
                            },
                        },
                        data: {
                            values: 'arrow_table',
                        },
                    },
                };
            },
        });
    }
    return elements;
}
function extension_getTotalNonNegativeElements(columnName, table) {
    const column = table.array(columnName);
    let nonNegativeElements = 0;
    column.forEach((element) => {
        if (element >= 0) {
            nonNegativeElements++;
        }
    });
    return {
        name: columnName,
        data: nonNegativeElements,
    };
}
function extension_getStringQueryElement(table, columnName) {
    return {
        name: columnName,
        icon: extension_faAlignJustify/* faAlignJustify */.Ti,
        next: [
            {
                name: 'histogram',
                next: (names, table) => {
                    return {
                        name: columnName,
                        data: {
                            spec: extension_getBinnedStringColumnSpec(columnName),
                            data: { values: 'arrow_table' },
                            resolver: {
                                type: extension_ResolverType.BINNED_STRING,
                                columnName: columnName,
                            },
                        },
                    };
                },
            },
        ],
    };
}
function extension_getArrayQueryElement(table, columnName) {
    return {
        name: columnName,
        icon: extension_faLayerGroup/* faLayerGroup */.qI,
        next: [
            {
                name: 'not empty',
                next: extension_getArrayBinQueryElements(table),
            },
        ],
    };
}
function extension_getArrayBinQueryElements(table) {
    const elements = [];
    for (const column of extension_getBinnableStringColumns(table)) {
        elements.push({
            name: `bin by ${column}`,
            next: (names, table) => {
                return {
                    name: 'Nonempty List',
                    data: {
                        spec: {
                            $schema: 'https://vega.github.io/schema/vega-lite/v5.json',
                            title: `${names[0]} per ${column}`,
                            description: `Bar chart visualizing the distribution of ${names[0]} per ${column}.`,
                            transform: [
                                {
                                    filter: `length(datum.${names[0]}) > 0`,
                                },
                            ],
                            data: { name: 'values' },
                            mark: { type: 'bar', tooltip: true },
                            encoding: {
                                y: { field: column, type: 'nominal', title: column },
                                x: {
                                    aggregate: 'count',
                                    type: 'quantitative',
                                    title: names[0],
                                },
                            },
                        },
                        data: {
                            values: 'arrow_table',
                        },
                    },
                };
            },
        });
    }
    return elements;
}

;// ../../canvas_viz/dist/elements/TextField.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/elements/TextField.svelte generated by Svelte v3.59.2 */


function extension_TextField_svelte_create_fragment(ctx) {
	let input;
	let mounted;
	let dispose;

	return {
		c() {
			input = extension_internal_element("input");
			extension_attr(input, "class", "border border-midgrey rounded w-full");
			extension_attr(input, "type", "text");
			extension_attr(input, "placeholder", /*placeholder*/ ctx[1]);
		},
		m(target, anchor) {
			extension_insert(target, input, anchor);
			extension_set_input_value(input, /*value*/ ctx[0]);

			if (!mounted) {
				dispose = extension_listen(input, "input", /*input_input_handler*/ ctx[2]);
				mounted = true;
			}
		},
		p(ctx, [dirty]) {
			if (dirty & /*placeholder*/ 2) {
				extension_attr(input, "placeholder", /*placeholder*/ ctx[1]);
			}

			if (dirty & /*value*/ 1 && input.value !== /*value*/ ctx[0]) {
				extension_set_input_value(input, /*value*/ ctx[0]);
			}
		},
		i: extension_noop,
		o: extension_noop,
		d(detaching) {
			if (detaching) extension_detach(input);
			mounted = false;
			dispose();
		}
	};
}

function extension_TextField_svelte_instance($$self, $$props, $$invalidate) {
	let { value } = $$props;
	let { placeholder = "" } = $$props;

	function input_input_handler() {
		value = this.value;
		$$invalidate(0, value);
	}

	$$self.$$set = $$props => {
		if ('value' in $$props) $$invalidate(0, value = $$props.value);
		if ('placeholder' in $$props) $$invalidate(1, placeholder = $$props.placeholder);
	};

	return [value, placeholder, input_input_handler];
}

class extension_TextField extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_TextField_svelte_instance, extension_TextField_svelte_create_fragment, extension_safe_not_equal, { value: 0, placeholder: 1 });
	}
}

/* harmony default export */ const extension_TextField_svelte = (extension_TextField);
;// ../../node_modules/json-stringify-pretty-compact/index.js
// Note: This regex matches even invalid JSON strings, but since we’re
// working on the output of `JSON.stringify` we know that only valid strings
// are present (unless the user supplied a weird `options.indent` but in
// that case we don’t care since the output would be invalid anyway).
const extension_stringOrChar = /("(?:[^\\"]|\\.)*")|[:,]/g;

function extension_stringify(passedObj, options = {}) {
  const indent = JSON.stringify(
    [1],
    undefined,
    options.indent === undefined ? 2 : options.indent
  ).slice(2, -3);

  const maxLength =
    indent === ""
      ? Infinity
      : options.maxLength === undefined
      ? 80
      : options.maxLength;

  let { replacer } = options;

  return (function _stringify(obj, currentIndent, reserved) {
    if (obj && typeof obj.toJSON === "function") {
      obj = obj.toJSON();
    }

    const string = JSON.stringify(obj, replacer);

    if (string === undefined) {
      return string;
    }

    const length = maxLength - currentIndent.length - reserved;

    if (string.length <= length) {
      const prettified = string.replace(
        extension_stringOrChar,
        (match, stringLiteral) => {
          return stringLiteral || `${match} `;
        }
      );
      if (prettified.length <= length) {
        return prettified;
      }
    }

    if (replacer != null) {
      obj = JSON.parse(string);
      replacer = undefined;
    }

    if (typeof obj === "object" && obj !== null) {
      const nextIndent = currentIndent + indent;
      const items = [];
      let index = 0;
      let start;
      let end;

      if (Array.isArray(obj)) {
        start = "[";
        end = "]";
        const { length } = obj;
        for (; index < length; index++) {
          items.push(
            _stringify(obj[index], nextIndent, index === length - 1 ? 0 : 1) ||
              "null"
          );
        }
      } else {
        start = "{";
        end = "}";
        const keys = Object.keys(obj);
        const { length } = keys;
        for (; index < length; index++) {
          const key = keys[index];
          const keyPart = `${JSON.stringify(key)}: `;
          const value = _stringify(
            obj[key],
            nextIndent,
            keyPart.length + (index === length - 1 ? 0 : 1)
          );
          if (value !== undefined) {
            items.push(keyPart + value);
          }
        }
      }

      if (items.length > 0) {
        return [start, indent + items.join(`,\n${nextIndent}`), end].join(
          `\n${currentIndent}`
        );
      }
    }

    return string;
  })(passedObj, "", 0);
}

;// ../../node_modules/vega-util/build/vega-util.module.js
function extension_accessor (fn, fields, name) {
  fn.fields = fields || [];
  fn.fname = name;
  return fn;
}
function extension_accessorName(fn) {
  return fn == null ? null : fn.fname;
}
function extension_accessorFields(fn) {
  return fn == null ? null : fn.fields;
}

function extension_getter (path) {
  return path.length === 1 ? extension_get1(path[0]) : extension_getN(path);
}
const extension_get1 = field => function (obj) {
  return obj[field];
};
const extension_getN = path => {
  const len = path.length;
  return function (obj) {
    for (let i = 0; i < len; ++i) {
      obj = obj[path[i]];
    }
    return obj;
  };
};

function extension_vega_util_module_error (message) {
  throw Error(message);
}

function extension_splitAccessPath (p) {
  const path = [],
    n = p.length;
  let q = null,
    b = 0,
    s = '',
    i,
    j,
    c;
  p = p + '';
  function push() {
    path.push(s + p.substring(i, j));
    s = '';
    i = j + 1;
  }
  for (i = j = 0; j < n; ++j) {
    c = p[j];
    if (c === '\\') {
      s += p.substring(i, j++);
      i = j;
    } else if (c === q) {
      push();
      q = null;
      b = -1;
    } else if (q) {
      continue;
    } else if (i === b && c === '"') {
      i = j + 1;
      q = c;
    } else if (i === b && c === "'") {
      i = j + 1;
      q = c;
    } else if (c === '.' && !b) {
      if (j > i) {
        push();
      } else {
        i = j + 1;
      }
    } else if (c === '[') {
      if (j > i) push();
      b = i = j + 1;
    } else if (c === ']') {
      if (!b) extension_vega_util_module_error('Access path missing open bracket: ' + p);
      if (b > 0) push();
      b = 0;
      i = j + 1;
    }
  }
  if (b) extension_vega_util_module_error('Access path missing closing bracket: ' + p);
  if (q) extension_vega_util_module_error('Access path missing closing quote: ' + p);
  if (j > i) {
    j++;
    push();
  }
  return path;
}

function extension_vega_util_module_field (field, name, opt) {
  const path = extension_splitAccessPath(field);
  field = path.length === 1 ? path[0] : field;
  return extension_accessor((opt && opt.get || extension_getter)(path), [field], name || field);
}

const extension_id = extension_vega_util_module_field('id');
const extension_vega_util_module_identity = extension_accessor(_ => _, [], 'identity');
const extension_zero = extension_accessor(() => 0, [], 'zero');
const extension_one = extension_accessor(() => 1, [], 'one');
const extension_truthy = extension_accessor(() => true, [], 'true');
const extension_falsy = extension_accessor(() => false, [], 'false');

function extension_log$1(method, level, input) {
  const args = [level].concat([].slice.call(input));
  console[method].apply(console, args); // eslint-disable-line no-console
}

const extension_None = 0;
const extension_Error$1 = 1;
const extension_vega_util_module_Warn = 2;
const extension_vega_util_module_Info = 3;
const extension_vega_util_module_Debug = 4;
function extension_logger (_, method) {
  let handler = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : extension_log$1;
  let level = _ || extension_None;
  return {
    level(_) {
      if (arguments.length) {
        level = +_;
        return this;
      } else {
        return level;
      }
    },
    error() {
      if (level >= extension_Error$1) handler(method || 'error', 'ERROR', arguments);
      return this;
    },
    warn() {
      if (level >= extension_vega_util_module_Warn) handler(method || 'warn', 'WARN', arguments);
      return this;
    },
    info() {
      if (level >= extension_vega_util_module_Info) handler(method || 'log', 'INFO', arguments);
      return this;
    },
    debug() {
      if (level >= extension_vega_util_module_Debug) handler(method || 'log', 'DEBUG', arguments);
      return this;
    }
  };
}

var extension_vega_util_module_isArray = Array.isArray;

function extension_vega_util_module_isObject (_) {
  return _ === Object(_);
}

const extension_isLegalKey = key => key !== '__proto__';
function extension_mergeConfig() {
  for (var _len = arguments.length, configs = new Array(_len), _key = 0; _key < _len; _key++) {
    configs[_key] = arguments[_key];
  }
  return configs.reduce((out, source) => {
    for (const key in source) {
      if (key === 'signals') {
        // for signals, we merge the signals arrays
        // source signals take precedence over
        // existing signals with the same name
        out.signals = extension_mergeNamed(out.signals, source.signals);
      } else {
        // otherwise, merge objects subject to recursion constraints
        // for legend block, recurse for the layout entry only
        // for style block, recurse for all properties
        // otherwise, no recursion: objects overwrite, no merging
        const r = key === 'legend' ? {
          layout: 1
        } : key === 'style' ? true : null;
        extension_writeConfig(out, key, source[key], r);
      }
    }
    return out;
  }, {});
}
function extension_writeConfig(output, key, value, recurse) {
  if (!extension_isLegalKey(key)) return;
  let k, o;
  if (extension_vega_util_module_isObject(value) && !extension_vega_util_module_isArray(value)) {
    o = extension_vega_util_module_isObject(output[key]) ? output[key] : output[key] = {};
    for (k in value) {
      if (recurse && (recurse === true || recurse[k])) {
        extension_writeConfig(o, k, value[k]);
      } else if (extension_isLegalKey(k)) {
        o[k] = value[k];
      }
    }
  } else {
    output[key] = value;
  }
}
function extension_mergeNamed(a, b) {
  if (a == null) return b;
  const map = {},
    out = [];
  function add(_) {
    if (!map[_.name]) {
      map[_.name] = 1;
      out.push(_);
    }
  }
  b.forEach(add);
  a.forEach(add);
  return out;
}

function extension_peek (array) {
  return array[array.length - 1];
}

function extension_toNumber (_) {
  return _ == null || _ === '' ? null : +_;
}

const extension_exp = sign => x => sign * Math.exp(x);
const extension_log = sign => x => Math.log(sign * x);
const extension_symlog = c => x => Math.sign(x) * Math.log1p(Math.abs(x / c));
const extension_symexp = c => x => Math.sign(x) * Math.expm1(Math.abs(x)) * c;
const extension_pow = exponent => x => x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
function extension_pan(domain, delta, lift, ground) {
  const d0 = lift(domain[0]),
    d1 = lift(extension_peek(domain)),
    dd = (d1 - d0) * delta;
  return [ground(d0 - dd), ground(d1 - dd)];
}
function extension_panLinear(domain, delta) {
  return extension_pan(domain, delta, extension_toNumber, extension_vega_util_module_identity);
}
function extension_panLog(domain, delta) {
  var sign = Math.sign(domain[0]);
  return extension_pan(domain, delta, extension_log(sign), extension_exp(sign));
}
function extension_panPow(domain, delta, exponent) {
  return extension_pan(domain, delta, extension_pow(exponent), extension_pow(1 / exponent));
}
function extension_panSymlog(domain, delta, constant) {
  return extension_pan(domain, delta, extension_symlog(constant), extension_symexp(constant));
}
function extension_zoom(domain, anchor, scale, lift, ground) {
  const d0 = lift(domain[0]),
    d1 = lift(extension_peek(domain)),
    da = anchor != null ? lift(anchor) : (d0 + d1) / 2;
  return [ground(da + (d0 - da) * scale), ground(da + (d1 - da) * scale)];
}
function extension_zoomLinear(domain, anchor, scale) {
  return extension_zoom(domain, anchor, scale, extension_toNumber, extension_vega_util_module_identity);
}
function extension_zoomLog(domain, anchor, scale) {
  const sign = Math.sign(domain[0]);
  return extension_zoom(domain, anchor, scale, extension_log(sign), extension_exp(sign));
}
function extension_zoomPow(domain, anchor, scale, exponent) {
  return extension_zoom(domain, anchor, scale, extension_pow(exponent), extension_pow(1 / exponent));
}
function extension_zoomSymlog(domain, anchor, scale, constant) {
  return extension_zoom(domain, anchor, scale, extension_symlog(constant), extension_symexp(constant));
}

function extension_quarter(date) {
  return 1 + ~~(new Date(date).getMonth() / 3);
}
function extension_utcquarter(date) {
  return 1 + ~~(new Date(date).getUTCMonth() / 3);
}

function extension_vega_util_module_array (_) {
  return _ != null ? extension_vega_util_module_isArray(_) ? _ : [_] : [];
}

/**
 * Span-preserving range clamp. If the span of the input range is less
 * than (max - min) and an endpoint exceeds either the min or max value,
 * the range is translated such that the span is preserved and one
 * endpoint touches the boundary of the min/max range.
 * If the span exceeds (max - min), the range [min, max] is returned.
 */
function extension_vega_util_module_clampRange (range, min, max) {
  let lo = range[0],
    hi = range[1],
    span;
  if (hi < lo) {
    span = hi;
    hi = lo;
    lo = span;
  }
  span = hi - lo;
  return span >= max - min ? [min, max] : [lo = Math.min(Math.max(lo, min), max - span), lo + span];
}

function extension_vega_util_module_isFunction (_) {
  return typeof _ === 'function';
}

const extension_DESCENDING = 'descending';
function extension_vega_util_module_compare (fields, orders, opt) {
  opt = opt || {};
  orders = extension_vega_util_module_array(orders) || [];
  const ord = [],
    get = [],
    fmap = {},
    gen = opt.comparator || extension_comparator;
  extension_vega_util_module_array(fields).forEach((f, i) => {
    if (f == null) return;
    ord.push(orders[i] === extension_DESCENDING ? -1 : 1);
    get.push(f = extension_vega_util_module_isFunction(f) ? f : extension_vega_util_module_field(f, null, opt));
    (extension_accessorFields(f) || []).forEach(_ => fmap[_] = 1);
  });
  return get.length === 0 ? null : extension_accessor(gen(get, ord), Object.keys(fmap));
}
const extension_vega_util_module_ascending = (u, v) => (u < v || u == null) && v != null ? -1 : (u > v || v == null) && u != null ? 1 : (v = v instanceof Date ? +v : v, u = u instanceof Date ? +u : u) !== u && v === v ? -1 : v !== v && u === u ? 1 : 0;
const extension_comparator = (fields, orders) => fields.length === 1 ? extension_compare1(fields[0], orders[0]) : extension_compareN(fields, orders, fields.length);
const extension_compare1 = (field, order) => function (a, b) {
  return extension_vega_util_module_ascending(field(a), field(b)) * order;
};
const extension_compareN = (fields, orders, n) => {
  orders.push(0); // pad zero for convenient lookup
  return function (a, b) {
    let f,
      c = 0,
      i = -1;
    while (c === 0 && ++i < n) {
      f = fields[i];
      c = extension_vega_util_module_ascending(f(a), f(b));
    }
    return c * orders[i];
  };
};

function extension_vega_util_module_constant (_) {
  return extension_vega_util_module_isFunction(_) ? _ : () => _;
}

function extension_debounce (delay, handler) {
  let tid;
  return e => {
    if (tid) clearTimeout(tid);
    tid = setTimeout(() => (handler(e), tid = null), delay);
  };
}

function extension_extend (_) {
  for (let x, k, i = 1, len = arguments.length; i < len; ++i) {
    x = arguments[i];
    for (k in x) {
      _[k] = x[k];
    }
  }
  return _;
}

/**
 * Return an array with minimum and maximum values, in the
 * form [min, max]. Ignores null, undefined, and NaN values.
 */
function extension_extent (array, f) {
  let i = 0,
    n,
    v,
    min,
    max;
  if (array && (n = array.length)) {
    if (f == null) {
      // find first valid value
      for (v = array[i]; i < n && (v == null || v !== v); v = array[++i]);
      min = max = v;

      // visit all other values
      for (; i < n; ++i) {
        v = array[i];
        // skip null/undefined; NaN will fail all comparisons
        if (v != null) {
          if (v < min) min = v;
          if (v > max) max = v;
        }
      }
    } else {
      // find first valid value
      for (v = f(array[i]); i < n && (v == null || v !== v); v = f(array[++i]));
      min = max = v;

      // visit all other values
      for (; i < n; ++i) {
        v = f(array[i]);
        // skip null/undefined; NaN will fail all comparisons
        if (v != null) {
          if (v < min) min = v;
          if (v > max) max = v;
        }
      }
    }
  }
  return [min, max];
}

function extension_extentIndex (array, f) {
  const n = array.length;
  let i = -1,
    a,
    b,
    c,
    u,
    v;
  if (f == null) {
    while (++i < n) {
      b = array[i];
      if (b != null && b >= b) {
        a = c = b;
        break;
      }
    }
    if (i === n) return [-1, -1];
    u = v = i;
    while (++i < n) {
      b = array[i];
      if (b != null) {
        if (a > b) {
          a = b;
          u = i;
        }
        if (c < b) {
          c = b;
          v = i;
        }
      }
    }
  } else {
    while (++i < n) {
      b = f(array[i], i, array);
      if (b != null && b >= b) {
        a = c = b;
        break;
      }
    }
    if (i === n) return [-1, -1];
    u = v = i;
    while (++i < n) {
      b = f(array[i], i, array);
      if (b != null) {
        if (a > b) {
          a = b;
          u = i;
        }
        if (c < b) {
          c = b;
          v = i;
        }
      }
    }
  }
  return [u, v];
}

const extension_hop = Object.prototype.hasOwnProperty;
function extension_vega_util_module_has (object, property) {
  return extension_hop.call(object, property);
}

const extension_NULL = {};
function extension_fastmap (input) {
  let obj = {},
    test;
  function has$1(key) {
    return extension_vega_util_module_has(obj, key) && obj[key] !== extension_NULL;
  }
  const map = {
    size: 0,
    empty: 0,
    object: obj,
    has: has$1,
    get(key) {
      return has$1(key) ? obj[key] : undefined;
    },
    set(key, value) {
      if (!has$1(key)) {
        ++map.size;
        if (obj[key] === extension_NULL) --map.empty;
      }
      obj[key] = value;
      return this;
    },
    delete(key) {
      if (has$1(key)) {
        --map.size;
        ++map.empty;
        obj[key] = extension_NULL;
      }
      return this;
    },
    clear() {
      map.size = map.empty = 0;
      map.object = obj = {};
    },
    test(_) {
      if (arguments.length) {
        test = _;
        return map;
      } else {
        return test;
      }
    },
    clean() {
      const next = {};
      let size = 0;
      for (const key in obj) {
        const value = obj[key];
        if (value !== extension_NULL && (!test || !test(value))) {
          next[key] = value;
          ++size;
        }
      }
      map.size = size;
      map.empty = 0;
      map.object = obj = next;
    }
  };
  if (input) Object.keys(input).forEach(key => {
    map.set(key, input[key]);
  });
  return map;
}

function extension_vega_util_module_flush (range, value, threshold, left, right, center) {
  if (!threshold && threshold !== 0) return center;
  const t = +threshold;
  let a = range[0],
    b = extension_peek(range),
    l;

  // swap endpoints if range is reversed
  if (b < a) {
    l = a;
    a = b;
    b = l;
  }

  // compare value to endpoints
  l = Math.abs(value - a);
  const r = Math.abs(b - value);

  // adjust if value is within threshold distance of endpoint
  return l < r && l <= t ? left : r <= t ? right : center;
}

function extension_inherits (child, parent, members) {
  const proto = child.prototype = Object.create(parent.prototype);
  Object.defineProperty(proto, 'constructor', {
    value: child,
    writable: true,
    enumerable: true,
    configurable: true
  });
  return extension_extend(proto, members);
}

/**
 * Predicate that returns true if the value lies within the span
 * of the given range. The left and right flags control the use
 * of inclusive (true) or exclusive (false) comparisons.
 */
function extension_inrange (value, range, left, right) {
  let r0 = range[0],
    r1 = range[range.length - 1],
    t;
  if (r0 > r1) {
    t = r0;
    r0 = r1;
    r1 = t;
  }
  left = left === undefined || left;
  right = right === undefined || right;
  return (left ? r0 <= value : r0 < value) && (right ? value <= r1 : value < r1);
}

function extension_vega_util_module_isBoolean (_) {
  return typeof _ === 'boolean';
}

function extension_isDate (_) {
  return Object.prototype.toString.call(_) === '[object Date]';
}

function extension_vega_util_module_isIterable (_) {
  return _ && extension_vega_util_module_isFunction(_[Symbol.iterator]);
}

function extension_vega_util_module_isNumber (_) {
  return typeof _ === 'number';
}

function extension_isRegExp (_) {
  return Object.prototype.toString.call(_) === '[object RegExp]';
}

function extension_vega_util_module_isString (_) {
  return typeof _ === 'string';
}

function extension_vega_util_module_key (fields, flat, opt) {
  if (fields) {
    fields = flat ? extension_vega_util_module_array(fields).map(f => f.replace(/\\(.)/g, '$1')) : extension_vega_util_module_array(fields);
  }
  const len = fields && fields.length,
    gen = opt && opt.get || extension_getter,
    map = f => gen(flat ? [f] : extension_splitAccessPath(f));
  let fn;
  if (!len) {
    fn = function () {
      return '';
    };
  } else if (len === 1) {
    const get = map(fields[0]);
    fn = function (_) {
      return '' + get(_);
    };
  } else {
    const get = fields.map(map);
    fn = function (_) {
      let s = '' + get[0](_),
        i = 0;
      while (++i < len) s += '|' + get[i](_);
      return s;
    };
  }
  return extension_accessor(fn, fields, 'key');
}

function extension_lerp (array, frac) {
  const lo = array[0],
    hi = extension_peek(array),
    f = +frac;
  return !f ? lo : f === 1 ? hi : lo + f * (hi - lo);
}

const extension_DEFAULT_MAX_SIZE = 10000;

// adapted from https://github.com/dominictarr/hashlru/ (MIT License)
function extension_lruCache (maxsize) {
  maxsize = +maxsize || extension_DEFAULT_MAX_SIZE;
  let curr, prev, size;
  const clear = () => {
    curr = {};
    prev = {};
    size = 0;
  };
  const update = (key, value) => {
    if (++size > maxsize) {
      prev = curr;
      curr = {};
      size = 1;
    }
    return curr[key] = value;
  };
  clear();
  return {
    clear,
    has: key => extension_vega_util_module_has(curr, key) || extension_vega_util_module_has(prev, key),
    get: key => extension_vega_util_module_has(curr, key) ? curr[key] : extension_vega_util_module_has(prev, key) ? update(key, prev[key]) : undefined,
    set: (key, value) => extension_vega_util_module_has(curr, key) ? curr[key] = value : update(key, value)
  };
}

function extension_merge (compare, array0, array1, output) {
  const n0 = array0.length,
    n1 = array1.length;
  if (!n1) return array0;
  if (!n0) return array1;
  const merged = output || new array0.constructor(n0 + n1);
  let i0 = 0,
    i1 = 0,
    i = 0;
  for (; i0 < n0 && i1 < n1; ++i) {
    merged[i] = compare(array0[i0], array1[i1]) > 0 ? array1[i1++] : array0[i0++];
  }
  for (; i0 < n0; ++i0, ++i) {
    merged[i] = array0[i0];
  }
  for (; i1 < n1; ++i1, ++i) {
    merged[i] = array1[i1];
  }
  return merged;
}

function extension_vega_util_module_repeat (str, reps) {
  let s = '';
  while (--reps >= 0) s += str;
  return s;
}

function extension_vega_util_module_pad (str, length, padchar, align) {
  const c = padchar || ' ',
    s = str + '',
    n = length - s.length;
  return n <= 0 ? s : align === 'left' ? extension_vega_util_module_repeat(c, n) + s : align === 'center' ? extension_vega_util_module_repeat(c, ~~(n / 2)) + s + extension_vega_util_module_repeat(c, Math.ceil(n / 2)) : s + extension_vega_util_module_repeat(c, n);
}

/**
 * Return the numerical span of an array: the difference between
 * the last and first values.
 */
function extension_span (array) {
  return array && extension_peek(array) - array[0] || 0;
}

function extension_$(x) {
  return extension_vega_util_module_isArray(x) ? '[' + x.map(extension_$) + ']' : extension_vega_util_module_isObject(x) || extension_vega_util_module_isString(x) ?
  // Output valid JSON and JS source strings.
  // See http://timelessrepo.com/json-isnt-a-javascript-subset
  JSON.stringify(x).replace('\u2028', '\\u2028').replace('\u2029', '\\u2029') : x;
}

function extension_toBoolean (_) {
  return _ == null || _ === '' ? null : !_ || _ === 'false' || _ === '0' ? false : !!_;
}

const extension_defaultParser = _ => extension_vega_util_module_isNumber(_) ? _ : extension_isDate(_) ? _ : Date.parse(_);
function extension_toDate (_, parser) {
  parser = parser || extension_defaultParser;
  return _ == null || _ === '' ? null : parser(_);
}

function extension_vega_util_module_toString (_) {
  return _ == null || _ === '' ? null : _ + '';
}

function extension_toSet (_) {
  const s = {},
    n = _.length;
  for (let i = 0; i < n; ++i) s[_[i]] = true;
  return s;
}

function extension_truncate (str, length, align, ellipsis) {
  const e = ellipsis != null ? ellipsis : '\u2026',
    s = str + '',
    n = s.length,
    l = Math.max(0, length - e.length);
  return n <= length ? s : align === 'left' ? e + s.slice(n - l) : align === 'center' ? s.slice(0, Math.ceil(l / 2)) + e + s.slice(n - ~~(l / 2)) : s.slice(0, l) + e;
}

function extension_visitArray (array, filter, visitor) {
  if (array) {
    if (filter) {
      const n = array.length;
      for (let i = 0; i < n; ++i) {
        const t = filter(array[i]);
        if (t) visitor(t, i, array);
      }
    } else {
      array.forEach(visitor);
    }
  }
}



;// ../../node_modules/d3-dsv/src/dsv.js
var extension_dsv_EOL = {},
    extension_dsv_EOF = {},
    extension_dsv_QUOTE = 34,
    extension_dsv_NEWLINE = 10,
    extension_dsv_RETURN = 13;

function extension_objectConverter(columns) {
  return new Function("d", "return {" + columns.map(function(name, i) {
    return JSON.stringify(name) + ": d[" + i + "] || \"\"";
  }).join(",") + "}");
}

function extension_customConverter(columns, f) {
  var object = extension_objectConverter(columns);
  return function(row, i) {
    return f(object(row), i, columns);
  };
}

// Compute unique columns in order of discovery.
function extension_inferColumns(rows) {
  var columnSet = Object.create(null),
      columns = [];

  rows.forEach(function(row) {
    for (var column in row) {
      if (!(column in columnSet)) {
        columns.push(columnSet[column] = column);
      }
    }
  });

  return columns;
}

function extension_dsv_pad(value, width) {
  var s = value + "", length = s.length;
  return length < width ? new Array(width - length + 1).join(0) + s : s;
}

function extension_dsv_formatYear(year) {
  return year < 0 ? "-" + extension_dsv_pad(-year, 6)
    : year > 9999 ? "+" + extension_dsv_pad(year, 6)
    : extension_dsv_pad(year, 4);
}

function extension_dsv_formatDate(date) {
  var hours = date.getUTCHours(),
      minutes = date.getUTCMinutes(),
      seconds = date.getUTCSeconds(),
      milliseconds = date.getUTCMilliseconds();
  return isNaN(date) ? "Invalid Date"
      : extension_dsv_formatYear(date.getUTCFullYear(), 4) + "-" + extension_dsv_pad(date.getUTCMonth() + 1, 2) + "-" + extension_dsv_pad(date.getUTCDate(), 2)
      + (milliseconds ? "T" + extension_dsv_pad(hours, 2) + ":" + extension_dsv_pad(minutes, 2) + ":" + extension_dsv_pad(seconds, 2) + "." + extension_dsv_pad(milliseconds, 3) + "Z"
      : seconds ? "T" + extension_dsv_pad(hours, 2) + ":" + extension_dsv_pad(minutes, 2) + ":" + extension_dsv_pad(seconds, 2) + "Z"
      : minutes || hours ? "T" + extension_dsv_pad(hours, 2) + ":" + extension_dsv_pad(minutes, 2) + "Z"
      : "");
}

/* harmony default export */ function extension_dsv(delimiter) {
  var reFormat = new RegExp("[\"" + delimiter + "\n\r]"),
      DELIMITER = delimiter.charCodeAt(0);

  function parse(text, f) {
    var convert, columns, rows = parseRows(text, function(row, i) {
      if (convert) return convert(row, i - 1);
      columns = row, convert = f ? extension_customConverter(row, f) : extension_objectConverter(row);
    });
    rows.columns = columns || [];
    return rows;
  }

  function parseRows(text, f) {
    var rows = [], // output rows
        N = text.length,
        I = 0, // current character index
        n = 0, // current line number
        t, // current token
        eof = N <= 0, // current token followed by EOF?
        eol = false; // current token followed by EOL?

    // Strip the trailing newline.
    if (text.charCodeAt(N - 1) === extension_dsv_NEWLINE) --N;
    if (text.charCodeAt(N - 1) === extension_dsv_RETURN) --N;

    function token() {
      if (eof) return extension_dsv_EOF;
      if (eol) return eol = false, extension_dsv_EOL;

      // Unescape quotes.
      var i, j = I, c;
      if (text.charCodeAt(j) === extension_dsv_QUOTE) {
        while (I++ < N && text.charCodeAt(I) !== extension_dsv_QUOTE || text.charCodeAt(++I) === extension_dsv_QUOTE);
        if ((i = I) >= N) eof = true;
        else if ((c = text.charCodeAt(I++)) === extension_dsv_NEWLINE) eol = true;
        else if (c === extension_dsv_RETURN) { eol = true; if (text.charCodeAt(I) === extension_dsv_NEWLINE) ++I; }
        return text.slice(j + 1, i - 1).replace(/""/g, "\"");
      }

      // Find next delimiter or newline.
      while (I < N) {
        if ((c = text.charCodeAt(i = I++)) === extension_dsv_NEWLINE) eol = true;
        else if (c === extension_dsv_RETURN) { eol = true; if (text.charCodeAt(I) === extension_dsv_NEWLINE) ++I; }
        else if (c !== DELIMITER) continue;
        return text.slice(j, i);
      }

      // Return last token before EOF.
      return eof = true, text.slice(j, N);
    }

    while ((t = token()) !== extension_dsv_EOF) {
      var row = [];
      while (t !== extension_dsv_EOL && t !== extension_dsv_EOF) row.push(t), t = token();
      if (f && (row = f(row, n++)) == null) continue;
      rows.push(row);
    }

    return rows;
  }

  function preformatBody(rows, columns) {
    return rows.map(function(row) {
      return columns.map(function(column) {
        return formatValue(row[column]);
      }).join(delimiter);
    });
  }

  function format(rows, columns) {
    if (columns == null) columns = extension_inferColumns(rows);
    return [columns.map(formatValue).join(delimiter)].concat(preformatBody(rows, columns)).join("\n");
  }

  function formatBody(rows, columns) {
    if (columns == null) columns = extension_inferColumns(rows);
    return preformatBody(rows, columns).join("\n");
  }

  function formatRows(rows) {
    return rows.map(formatRow).join("\n");
  }

  function formatRow(row) {
    return row.map(formatValue).join(delimiter);
  }

  function formatValue(value) {
    return value == null ? ""
        : value instanceof Date ? extension_dsv_formatDate(value)
        : reFormat.test(value += "") ? "\"" + value.replace(/"/g, "\"\"") + "\""
        : value;
  }

  return {
    parse: parse,
    parseRows: parseRows,
    format: format,
    formatBody: formatBody,
    formatRows: formatRows,
    formatRow: formatRow,
    formatValue: formatValue
  };
}

;// ../../node_modules/topojson-client/src/reverse.js
/* harmony default export */ function extension_reverse(array, n) {
  var t, j = array.length, i = j - n;
  while (i < --j) t = array[i], array[i++] = array[j], array[j] = t;
}

;// ../../node_modules/topojson-client/src/identity.js
/* harmony default export */ function extension_src_identity(x) {
  return x;
}

;// ../../node_modules/topojson-client/src/transform.js


/* harmony default export */ function extension_transform(transform) {
  if (transform == null) return extension_src_identity;
  var x0,
      y0,
      kx = transform.scale[0],
      ky = transform.scale[1],
      dx = transform.translate[0],
      dy = transform.translate[1];
  return function(input, i) {
    if (!i) x0 = y0 = 0;
    var j = 2, n = input.length, output = new Array(n);
    output[0] = (x0 += input[0]) * kx + dx;
    output[1] = (y0 += input[1]) * ky + dy;
    while (j < n) output[j] = input[j], ++j;
    return output;
  };
}

;// ../../node_modules/topojson-client/src/feature.js



/* harmony default export */ function extension_feature(topology, o) {
  if (typeof o === "string") o = topology.objects[o];
  return o.type === "GeometryCollection"
      ? {type: "FeatureCollection", features: o.geometries.map(function(o) { return extension_feature_feature(topology, o); })}
      : extension_feature_feature(topology, o);
}

function extension_feature_feature(topology, o) {
  var id = o.id,
      bbox = o.bbox,
      properties = o.properties == null ? {} : o.properties,
      geometry = extension_feature_object(topology, o);
  return id == null && bbox == null ? {type: "Feature", properties: properties, geometry: geometry}
      : bbox == null ? {type: "Feature", id: id, properties: properties, geometry: geometry}
      : {type: "Feature", id: id, bbox: bbox, properties: properties, geometry: geometry};
}

function extension_feature_object(topology, o) {
  var transformPoint = extension_transform(topology.transform),
      arcs = topology.arcs;

  function arc(i, points) {
    if (points.length) points.pop();
    for (var a = arcs[i < 0 ? ~i : i], k = 0, n = a.length; k < n; ++k) {
      points.push(transformPoint(a[k], k));
    }
    if (i < 0) extension_reverse(points, n);
  }

  function point(p) {
    return transformPoint(p);
  }

  function line(arcs) {
    var points = [];
    for (var i = 0, n = arcs.length; i < n; ++i) arc(arcs[i], points);
    if (points.length < 2) points.push(points[0]); // This should never happen per the specification.
    return points;
  }

  function ring(arcs) {
    var points = line(arcs);
    while (points.length < 4) points.push(points[0]); // This may happen if an arc has only two points.
    return points;
  }

  function polygon(arcs) {
    return arcs.map(ring);
  }

  function geometry(o) {
    var type = o.type, coordinates;
    switch (type) {
      case "GeometryCollection": return {type: type, geometries: o.geometries.map(geometry)};
      case "Point": coordinates = point(o.coordinates); break;
      case "MultiPoint": coordinates = o.coordinates.map(point); break;
      case "LineString": coordinates = line(o.arcs); break;
      case "MultiLineString": coordinates = o.arcs.map(line); break;
      case "Polygon": coordinates = polygon(o.arcs); break;
      case "MultiPolygon": coordinates = o.arcs.map(polygon); break;
      default: return null;
    }
    return {type: type, coordinates: coordinates};
  }

  return geometry(o);
}

;// ../../node_modules/topojson-client/src/stitch.js
/* harmony default export */ function extension_stitch(topology, arcs) {
  var stitchedArcs = {},
      fragmentByStart = {},
      fragmentByEnd = {},
      fragments = [],
      emptyIndex = -1;

  // Stitch empty arcs first, since they may be subsumed by other arcs.
  arcs.forEach(function(i, j) {
    var arc = topology.arcs[i < 0 ? ~i : i], t;
    if (arc.length < 3 && !arc[1][0] && !arc[1][1]) {
      t = arcs[++emptyIndex], arcs[emptyIndex] = i, arcs[j] = t;
    }
  });

  arcs.forEach(function(i) {
    var e = ends(i),
        start = e[0],
        end = e[1],
        f, g;

    if (f = fragmentByEnd[start]) {
      delete fragmentByEnd[f.end];
      f.push(i);
      f.end = end;
      if (g = fragmentByStart[end]) {
        delete fragmentByStart[g.start];
        var fg = g === f ? f : f.concat(g);
        fragmentByStart[fg.start = f.start] = fragmentByEnd[fg.end = g.end] = fg;
      } else {
        fragmentByStart[f.start] = fragmentByEnd[f.end] = f;
      }
    } else if (f = fragmentByStart[end]) {
      delete fragmentByStart[f.start];
      f.unshift(i);
      f.start = start;
      if (g = fragmentByEnd[start]) {
        delete fragmentByEnd[g.end];
        var gf = g === f ? f : g.concat(f);
        fragmentByStart[gf.start = g.start] = fragmentByEnd[gf.end = f.end] = gf;
      } else {
        fragmentByStart[f.start] = fragmentByEnd[f.end] = f;
      }
    } else {
      f = [i];
      fragmentByStart[f.start = start] = fragmentByEnd[f.end = end] = f;
    }
  });

  function ends(i) {
    var arc = topology.arcs[i < 0 ? ~i : i], p0 = arc[0], p1;
    if (topology.transform) p1 = [0, 0], arc.forEach(function(dp) { p1[0] += dp[0], p1[1] += dp[1]; });
    else p1 = arc[arc.length - 1];
    return i < 0 ? [p1, p0] : [p0, p1];
  }

  function flush(fragmentByEnd, fragmentByStart) {
    for (var k in fragmentByEnd) {
      var f = fragmentByEnd[k];
      delete fragmentByStart[f.start];
      delete f.start;
      delete f.end;
      f.forEach(function(i) { stitchedArcs[i < 0 ? ~i : i] = 1; });
      fragments.push(f);
    }
  }

  flush(fragmentByEnd, fragmentByStart);
  flush(fragmentByStart, fragmentByEnd);
  arcs.forEach(function(i) { if (!stitchedArcs[i < 0 ? ~i : i]) fragments.push([i]); });

  return fragments;
}

;// ../../node_modules/topojson-client/src/mesh.js



/* harmony default export */ function extension_mesh(topology) {
  return extension_feature_object(topology, extension_meshArcs.apply(this, arguments));
}

function extension_meshArcs(topology, object, filter) {
  var arcs, i, n;
  if (arguments.length > 1) arcs = extension_extractArcs(topology, object, filter);
  else for (i = 0, arcs = new Array(n = topology.arcs.length); i < n; ++i) arcs[i] = i;
  return {type: "MultiLineString", arcs: extension_stitch(topology, arcs)};
}

function extension_extractArcs(topology, object, filter) {
  var arcs = [],
      geomsByArc = [],
      geom;

  function extract0(i) {
    var j = i < 0 ? ~i : i;
    (geomsByArc[j] || (geomsByArc[j] = [])).push({i: i, g: geom});
  }

  function extract1(arcs) {
    arcs.forEach(extract0);
  }

  function extract2(arcs) {
    arcs.forEach(extract1);
  }

  function extract3(arcs) {
    arcs.forEach(extract2);
  }

  function geometry(o) {
    switch (geom = o, o.type) {
      case "GeometryCollection": o.geometries.forEach(geometry); break;
      case "LineString": extract1(o.arcs); break;
      case "MultiLineString": case "Polygon": extract2(o.arcs); break;
      case "MultiPolygon": extract3(o.arcs); break;
    }
  }

  geometry(object);

  geomsByArc.forEach(filter == null
      ? function(geoms) { arcs.push(geoms[0].i); }
      : function(geoms) { if (filter(geoms[0].g, geoms[geoms.length - 1].g)) arcs.push(geoms[0].i); });

  return arcs;
}

;// ../../node_modules/d3-array/src/ticks.js
const extension_e10 = Math.sqrt(50),
    extension_e5 = Math.sqrt(10),
    extension_e2 = Math.sqrt(2);

function extension_tickSpec(start, stop, count) {
  const step = (stop - start) / Math.max(0, count),
      power = Math.floor(Math.log10(step)),
      error = step / Math.pow(10, power),
      factor = error >= extension_e10 ? 10 : error >= extension_e5 ? 5 : error >= extension_e2 ? 2 : 1;
  let i1, i2, inc;
  if (power < 0) {
    inc = Math.pow(10, -power) / factor;
    i1 = Math.round(start * inc);
    i2 = Math.round(stop * inc);
    if (i1 / inc < start) ++i1;
    if (i2 / inc > stop) --i2;
    inc = -inc;
  } else {
    inc = Math.pow(10, power) * factor;
    i1 = Math.round(start / inc);
    i2 = Math.round(stop / inc);
    if (i1 * inc < start) ++i1;
    if (i2 * inc > stop) --i2;
  }
  if (i2 < i1 && 0.5 <= count && count < 2) return extension_tickSpec(start, stop, count * 2);
  return [i1, i2, inc];
}

function extension_ticks(start, stop, count) {
  stop = +stop, start = +start, count = +count;
  if (!(count > 0)) return [];
  if (start === stop) return [start];
  const reverse = stop < start, [i1, i2, inc] = reverse ? extension_tickSpec(stop, start, count) : extension_tickSpec(start, stop, count);
  if (!(i2 >= i1)) return [];
  const n = i2 - i1 + 1, ticks = new Array(n);
  if (reverse) {
    if (inc < 0) for (let i = 0; i < n; ++i) ticks[i] = (i2 - i) / -inc;
    else for (let i = 0; i < n; ++i) ticks[i] = (i2 - i) * inc;
  } else {
    if (inc < 0) for (let i = 0; i < n; ++i) ticks[i] = (i1 + i) / -inc;
    else for (let i = 0; i < n; ++i) ticks[i] = (i1 + i) * inc;
  }
  return ticks;
}

function extension_tickIncrement(start, stop, count) {
  stop = +stop, start = +start, count = +count;
  return extension_tickSpec(start, stop, count)[2];
}

function extension_tickStep(start, stop, count) {
  stop = +stop, start = +start, count = +count;
  const reverse = stop < start, inc = reverse ? extension_tickIncrement(stop, start, count) : extension_tickIncrement(start, stop, count);
  return (reverse ? -1 : 1) * (inc < 0 ? 1 / -inc : inc);
}

;// ../../node_modules/d3-format/src/formatSpecifier.js
// [[fill]align][sign][symbol][0][width][,][.precision][~][type]
var extension_re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;

function extension_formatSpecifier(specifier) {
  if (!(match = extension_re.exec(specifier))) throw new Error("invalid format: " + specifier);
  var match;
  return new extension_FormatSpecifier({
    fill: match[1],
    align: match[2],
    sign: match[3],
    symbol: match[4],
    zero: match[5],
    width: match[6],
    comma: match[7],
    precision: match[8] && match[8].slice(1),
    trim: match[9],
    type: match[10]
  });
}

extension_formatSpecifier.prototype = extension_FormatSpecifier.prototype; // instanceof

function extension_FormatSpecifier(specifier) {
  this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
  this.align = specifier.align === undefined ? ">" : specifier.align + "";
  this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
  this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
  this.zero = !!specifier.zero;
  this.width = specifier.width === undefined ? undefined : +specifier.width;
  this.comma = !!specifier.comma;
  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
  this.trim = !!specifier.trim;
  this.type = specifier.type === undefined ? "" : specifier.type + "";
}

extension_FormatSpecifier.prototype.toString = function() {
  return this.fill
      + this.align
      + this.sign
      + this.symbol
      + (this.zero ? "0" : "")
      + (this.width === undefined ? "" : Math.max(1, this.width | 0))
      + (this.comma ? "," : "")
      + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0))
      + (this.trim ? "~" : "")
      + this.type;
};

;// ../../node_modules/d3-format/src/formatDecimal.js
/* harmony default export */ function extension_formatDecimal(x) {
  return Math.abs(x = Math.round(x)) >= 1e21
      ? x.toLocaleString("en").replace(/,/g, "")
      : x.toString(10);
}

// Computes the decimal coefficient and exponent of the specified number x with
// significant digits p, where x is positive and p is in [1, 21] or undefined.
// For example, formatDecimalParts(1.23) returns ["123", 0].
function extension_formatDecimalParts(x, p) {
  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
  var i, coefficient = x.slice(0, i);

  // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
  return [
    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
    +x.slice(i + 1)
  ];
}

;// ../../node_modules/d3-format/src/exponent.js


/* harmony default export */ function extension_exponent(x) {
  return x = extension_formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
}

;// ../../node_modules/d3-format/src/precisionPrefix.js


/* harmony default export */ function extension_precisionPrefix(step, value) {
  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(extension_exponent(value) / 3))) * 3 - extension_exponent(Math.abs(step)));
}

;// ../../node_modules/d3-format/src/precisionRound.js


/* harmony default export */ function extension_precisionRound(step, max) {
  step = Math.abs(step), max = Math.abs(max) - step;
  return Math.max(0, extension_exponent(max) - extension_exponent(step)) + 1;
}

;// ../../node_modules/d3-format/src/precisionFixed.js


/* harmony default export */ function extension_precisionFixed(step) {
  return Math.max(0, -extension_exponent(Math.abs(step)));
}

;// ../../node_modules/d3-format/src/formatGroup.js
/* harmony default export */ function extension_formatGroup(grouping, thousands) {
  return function(value, width) {
    var i = value.length,
        t = [],
        j = 0,
        g = grouping[0],
        length = 0;

    while (i > 0 && g > 0) {
      if (length + g + 1 > width) g = Math.max(1, width - length);
      t.push(value.substring(i -= g, i + g));
      if ((length += g + 1) > width) break;
      g = grouping[j = (j + 1) % grouping.length];
    }

    return t.reverse().join(thousands);
  };
}

;// ../../node_modules/d3-format/src/formatNumerals.js
/* harmony default export */ function extension_formatNumerals(numerals) {
  return function(value) {
    return value.replace(/[0-9]/g, function(i) {
      return numerals[+i];
    });
  };
}

;// ../../node_modules/d3-format/src/formatTrim.js
// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
/* harmony default export */ function extension_formatTrim(s) {
  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
    switch (s[i]) {
      case ".": i0 = i1 = i; break;
      case "0": if (i0 === 0) i0 = i; i1 = i; break;
      default: if (!+s[i]) break out; if (i0 > 0) i0 = 0; break;
    }
  }
  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
}

;// ../../node_modules/d3-format/src/formatPrefixAuto.js


var extension_prefixExponent;

/* harmony default export */ function extension_formatPrefixAuto(x, p) {
  var d = extension_formatDecimalParts(x, p);
  if (!d) return x + "";
  var coefficient = d[0],
      exponent = d[1],
      i = exponent - (extension_prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
      n = coefficient.length;
  return i === n ? coefficient
      : i > n ? coefficient + new Array(i - n + 1).join("0")
      : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
      : "0." + new Array(1 - i).join("0") + extension_formatDecimalParts(x, Math.max(0, p + i - 1))[0]; // less than 1y!
}

;// ../../node_modules/d3-format/src/formatRounded.js


/* harmony default export */ function extension_formatRounded(x, p) {
  var d = extension_formatDecimalParts(x, p);
  if (!d) return x + "";
  var coefficient = d[0],
      exponent = d[1];
  return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
      : coefficient + new Array(exponent - coefficient.length + 2).join("0");
}

;// ../../node_modules/d3-format/src/formatTypes.js




/* harmony default export */ const extension_formatTypes = ({
  "%": (x, p) => (x * 100).toFixed(p),
  "b": (x) => Math.round(x).toString(2),
  "c": (x) => x + "",
  "d": extension_formatDecimal,
  "e": (x, p) => x.toExponential(p),
  "f": (x, p) => x.toFixed(p),
  "g": (x, p) => x.toPrecision(p),
  "o": (x) => Math.round(x).toString(8),
  "p": (x, p) => extension_formatRounded(x * 100, p),
  "r": extension_formatRounded,
  "s": extension_formatPrefixAuto,
  "X": (x) => Math.round(x).toString(16).toUpperCase(),
  "x": (x) => Math.round(x).toString(16)
});

;// ../../node_modules/d3-format/src/identity.js
/* harmony default export */ function extension_d3_format_src_identity(x) {
  return x;
}

;// ../../node_modules/d3-format/src/locale.js









var extension_map = Array.prototype.map,
    extension_prefixes = ["y","z","a","f","p","n","µ","m","","k","M","G","T","P","E","Z","Y"];

/* harmony default export */ function extension_locale(locale) {
  var group = locale.grouping === undefined || locale.thousands === undefined ? extension_d3_format_src_identity : extension_formatGroup(extension_map.call(locale.grouping, Number), locale.thousands + ""),
      currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
      currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
      decimal = locale.decimal === undefined ? "." : locale.decimal + "",
      numerals = locale.numerals === undefined ? extension_d3_format_src_identity : extension_formatNumerals(extension_map.call(locale.numerals, String)),
      percent = locale.percent === undefined ? "%" : locale.percent + "",
      minus = locale.minus === undefined ? "−" : locale.minus + "",
      nan = locale.nan === undefined ? "NaN" : locale.nan + "";

  function newFormat(specifier) {
    specifier = extension_formatSpecifier(specifier);

    var fill = specifier.fill,
        align = specifier.align,
        sign = specifier.sign,
        symbol = specifier.symbol,
        zero = specifier.zero,
        width = specifier.width,
        comma = specifier.comma,
        precision = specifier.precision,
        trim = specifier.trim,
        type = specifier.type;

    // The "n" type is an alias for ",g".
    if (type === "n") comma = true, type = "g";

    // The "" type, and any invalid type, is an alias for ".12~g".
    else if (!extension_formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g";

    // If zero fill is specified, padding goes after sign and before digits.
    if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";

    // Compute the prefix and suffix.
    // For SI-prefix, the suffix is lazily computed.
    var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
        suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : "";

    // What format function should we use?
    // Is this an integer type?
    // Can this type generate exponential notation?
    var formatType = extension_formatTypes[type],
        maybeSuffix = /[defgprs%]/.test(type);

    // Set the default precision if not specified,
    // or clamp the specified precision to the supported range.
    // For significant precision, it must be in [1, 21].
    // For fixed precision, it must be in [0, 20].
    precision = precision === undefined ? 6
        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
        : Math.max(0, Math.min(20, precision));

    function format(value) {
      var valuePrefix = prefix,
          valueSuffix = suffix,
          i, n, c;

      if (type === "c") {
        valueSuffix = formatType(value) + valueSuffix;
        value = "";
      } else {
        value = +value;

        // Determine the sign. -0 is not less than 0, but 1 / -0 is!
        var valueNegative = value < 0 || 1 / value < 0;

        // Perform the initial formatting.
        value = isNaN(value) ? nan : formatType(Math.abs(value), precision);

        // Trim insignificant zeros.
        if (trim) value = extension_formatTrim(value);

        // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
        if (valueNegative && +value === 0 && sign !== "+") valueNegative = false;

        // Compute the prefix and suffix.
        valuePrefix = (valueNegative ? (sign === "(" ? sign : minus) : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
        valueSuffix = (type === "s" ? extension_prefixes[8 + extension_prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : "");

        // Break the formatted value into the integer “value” part that can be
        // grouped, and fractional or exponential “suffix” part that is not.
        if (maybeSuffix) {
          i = -1, n = value.length;
          while (++i < n) {
            if (c = value.charCodeAt(i), 48 > c || c > 57) {
              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
              value = value.slice(0, i);
              break;
            }
          }
        }
      }

      // If the fill character is not "0", grouping is applied before padding.
      if (comma && !zero) value = group(value, Infinity);

      // Compute the padding.
      var length = valuePrefix.length + value.length + valueSuffix.length,
          padding = length < width ? new Array(width - length + 1).join(fill) : "";

      // If the fill character is "0", grouping is applied after padding.
      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = "";

      // Reconstruct the final output based on the desired alignment.
      switch (align) {
        case "<": value = valuePrefix + value + valueSuffix + padding; break;
        case "=": value = valuePrefix + padding + value + valueSuffix; break;
        case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
        default: value = padding + valuePrefix + value + valueSuffix; break;
      }

      return numerals(value);
    }

    format.toString = function() {
      return specifier + "";
    };

    return format;
  }

  function formatPrefix(specifier, value) {
    var f = newFormat((specifier = extension_formatSpecifier(specifier), specifier.type = "f", specifier)),
        e = Math.max(-8, Math.min(8, Math.floor(extension_exponent(value) / 3))) * 3,
        k = Math.pow(10, -e),
        prefix = extension_prefixes[8 + e / 3];
    return function(value) {
      return f(k * value) + prefix;
    };
  }

  return {
    format: newFormat,
    formatPrefix: formatPrefix
  };
}

;// ../../node_modules/d3-format/src/defaultLocale.js


var extension_defaultLocale_locale;
var extension_format;
var extension_formatPrefix;

extension_defaultLocale({
  thousands: ",",
  grouping: [3],
  currency: ["$", ""]
});

function extension_defaultLocale(definition) {
  extension_defaultLocale_locale = extension_locale(definition);
  extension_format = extension_defaultLocale_locale.format;
  extension_formatPrefix = extension_defaultLocale_locale.formatPrefix;
  return extension_defaultLocale_locale;
}

;// ../../node_modules/d3-time/src/interval.js
const extension_interval_t0 = new Date, extension_interval_t1 = new Date;

function extension_timeInterval(floori, offseti, count, field) {

  function interval(date) {
    return floori(date = arguments.length === 0 ? new Date : new Date(+date)), date;
  }

  interval.floor = (date) => {
    return floori(date = new Date(+date)), date;
  };

  interval.ceil = (date) => {
    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
  };

  interval.round = (date) => {
    const d0 = interval(date), d1 = interval.ceil(date);
    return date - d0 < d1 - date ? d0 : d1;
  };

  interval.offset = (date, step) => {
    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
  };

  interval.range = (start, stop, step) => {
    const range = [];
    start = interval.ceil(start);
    step = step == null ? 1 : Math.floor(step);
    if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
    let previous;
    do range.push(previous = new Date(+start)), offseti(start, step), floori(start);
    while (previous < start && start < stop);
    return range;
  };

  interval.filter = (test) => {
    return extension_timeInterval((date) => {
      if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
    }, (date, step) => {
      if (date >= date) {
        if (step < 0) while (++step <= 0) {
          while (offseti(date, -1), !test(date)) {} // eslint-disable-line no-empty
        } else while (--step >= 0) {
          while (offseti(date, +1), !test(date)) {} // eslint-disable-line no-empty
        }
      }
    });
  };

  if (count) {
    interval.count = (start, end) => {
      extension_interval_t0.setTime(+start), extension_interval_t1.setTime(+end);
      floori(extension_interval_t0), floori(extension_interval_t1);
      return Math.floor(count(extension_interval_t0, extension_interval_t1));
    };

    interval.every = (step) => {
      step = Math.floor(step);
      return !isFinite(step) || !(step > 0) ? null
          : !(step > 1) ? interval
          : interval.filter(field
              ? (d) => field(d) % step === 0
              : (d) => interval.count(0, d) % step === 0);
    };
  }

  return interval;
}

;// ../../node_modules/d3-time/src/duration.js
const extension_durationSecond = 1000;
const extension_durationMinute = extension_durationSecond * 60;
const extension_durationHour = extension_durationMinute * 60;
const extension_durationDay = extension_durationHour * 24;
const extension_durationWeek = extension_durationDay * 7;
const extension_durationMonth = extension_durationDay * 30;
const extension_durationYear = extension_durationDay * 365;

;// ../../node_modules/d3-time/src/day.js



const extension_timeDay = extension_timeInterval(
  date => date.setHours(0, 0, 0, 0),
  (date, step) => date.setDate(date.getDate() + step),
  (start, end) => (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * extension_durationMinute) / extension_durationDay,
  date => date.getDate() - 1
);

const extension_timeDays = extension_timeDay.range;

const extension_utcDay = extension_timeInterval((date) => {
  date.setUTCHours(0, 0, 0, 0);
}, (date, step) => {
  date.setUTCDate(date.getUTCDate() + step);
}, (start, end) => {
  return (end - start) / extension_durationDay;
}, (date) => {
  return date.getUTCDate() - 1;
});

const extension_utcDays = extension_utcDay.range;

const extension_unixDay = extension_timeInterval((date) => {
  date.setUTCHours(0, 0, 0, 0);
}, (date, step) => {
  date.setUTCDate(date.getUTCDate() + step);
}, (start, end) => {
  return (end - start) / extension_durationDay;
}, (date) => {
  return Math.floor(date / extension_durationDay);
});

const extension_unixDays = extension_unixDay.range;

;// ../../node_modules/d3-time/src/week.js



function extension_timeWeekday(i) {
  return extension_timeInterval((date) => {
    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
    date.setHours(0, 0, 0, 0);
  }, (date, step) => {
    date.setDate(date.getDate() + step * 7);
  }, (start, end) => {
    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * extension_durationMinute) / extension_durationWeek;
  });
}

const extension_timeSunday = extension_timeWeekday(0);
const extension_timeMonday = extension_timeWeekday(1);
const extension_timeTuesday = extension_timeWeekday(2);
const extension_timeWednesday = extension_timeWeekday(3);
const extension_timeThursday = extension_timeWeekday(4);
const extension_timeFriday = extension_timeWeekday(5);
const extension_timeSaturday = extension_timeWeekday(6);

const extension_timeSundays = extension_timeSunday.range;
const extension_timeMondays = extension_timeMonday.range;
const extension_timeTuesdays = extension_timeTuesday.range;
const extension_timeWednesdays = extension_timeWednesday.range;
const extension_timeThursdays = extension_timeThursday.range;
const extension_timeFridays = extension_timeFriday.range;
const extension_timeSaturdays = extension_timeSaturday.range;

function extension_utcWeekday(i) {
  return extension_timeInterval((date) => {
    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
    date.setUTCHours(0, 0, 0, 0);
  }, (date, step) => {
    date.setUTCDate(date.getUTCDate() + step * 7);
  }, (start, end) => {
    return (end - start) / extension_durationWeek;
  });
}

const extension_utcSunday = extension_utcWeekday(0);
const extension_utcMonday = extension_utcWeekday(1);
const extension_utcTuesday = extension_utcWeekday(2);
const extension_utcWednesday = extension_utcWeekday(3);
const extension_utcThursday = extension_utcWeekday(4);
const extension_utcFriday = extension_utcWeekday(5);
const extension_utcSaturday = extension_utcWeekday(6);

const extension_utcSundays = extension_utcSunday.range;
const extension_utcMondays = extension_utcMonday.range;
const extension_utcTuesdays = extension_utcTuesday.range;
const extension_utcWednesdays = extension_utcWednesday.range;
const extension_utcThursdays = extension_utcThursday.range;
const extension_utcFridays = extension_utcFriday.range;
const extension_utcSaturdays = extension_utcSaturday.range;

;// ../../node_modules/d3-time/src/year.js


const extension_timeYear = extension_timeInterval((date) => {
  date.setMonth(0, 1);
  date.setHours(0, 0, 0, 0);
}, (date, step) => {
  date.setFullYear(date.getFullYear() + step);
}, (start, end) => {
  return end.getFullYear() - start.getFullYear();
}, (date) => {
  return date.getFullYear();
});

// An optimized implementation for this simple case.
extension_timeYear.every = (k) => {
  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : extension_timeInterval((date) => {
    date.setFullYear(Math.floor(date.getFullYear() / k) * k);
    date.setMonth(0, 1);
    date.setHours(0, 0, 0, 0);
  }, (date, step) => {
    date.setFullYear(date.getFullYear() + step * k);
  });
};

const extension_timeYears = extension_timeYear.range;

const extension_utcYear = extension_timeInterval((date) => {
  date.setUTCMonth(0, 1);
  date.setUTCHours(0, 0, 0, 0);
}, (date, step) => {
  date.setUTCFullYear(date.getUTCFullYear() + step);
}, (start, end) => {
  return end.getUTCFullYear() - start.getUTCFullYear();
}, (date) => {
  return date.getUTCFullYear();
});

// An optimized implementation for this simple case.
extension_utcYear.every = (k) => {
  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : extension_timeInterval((date) => {
    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
    date.setUTCMonth(0, 1);
    date.setUTCHours(0, 0, 0, 0);
  }, (date, step) => {
    date.setUTCFullYear(date.getUTCFullYear() + step * k);
  });
};

const extension_utcYears = extension_utcYear.range;

;// ../../node_modules/d3-time/src/month.js


const extension_timeMonth = extension_timeInterval((date) => {
  date.setDate(1);
  date.setHours(0, 0, 0, 0);
}, (date, step) => {
  date.setMonth(date.getMonth() + step);
}, (start, end) => {
  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
}, (date) => {
  return date.getMonth();
});

const extension_timeMonths = extension_timeMonth.range;

const extension_utcMonth = extension_timeInterval((date) => {
  date.setUTCDate(1);
  date.setUTCHours(0, 0, 0, 0);
}, (date, step) => {
  date.setUTCMonth(date.getUTCMonth() + step);
}, (start, end) => {
  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
}, (date) => {
  return date.getUTCMonth();
});

const extension_utcMonths = extension_utcMonth.range;

;// ../../node_modules/d3-time/src/hour.js



const extension_timeHour = extension_timeInterval((date) => {
  date.setTime(date - date.getMilliseconds() - date.getSeconds() * extension_durationSecond - date.getMinutes() * extension_durationMinute);
}, (date, step) => {
  date.setTime(+date + step * extension_durationHour);
}, (start, end) => {
  return (end - start) / extension_durationHour;
}, (date) => {
  return date.getHours();
});

const extension_timeHours = extension_timeHour.range;

const extension_utcHour = extension_timeInterval((date) => {
  date.setUTCMinutes(0, 0, 0);
}, (date, step) => {
  date.setTime(+date + step * extension_durationHour);
}, (start, end) => {
  return (end - start) / extension_durationHour;
}, (date) => {
  return date.getUTCHours();
});

const extension_utcHours = extension_utcHour.range;

;// ../../node_modules/d3-time/src/minute.js



const extension_timeMinute = extension_timeInterval((date) => {
  date.setTime(date - date.getMilliseconds() - date.getSeconds() * extension_durationSecond);
}, (date, step) => {
  date.setTime(+date + step * extension_durationMinute);
}, (start, end) => {
  return (end - start) / extension_durationMinute;
}, (date) => {
  return date.getMinutes();
});

const extension_timeMinutes = extension_timeMinute.range;

const extension_utcMinute = extension_timeInterval((date) => {
  date.setUTCSeconds(0, 0);
}, (date, step) => {
  date.setTime(+date + step * extension_durationMinute);
}, (start, end) => {
  return (end - start) / extension_durationMinute;
}, (date) => {
  return date.getUTCMinutes();
});

const extension_utcMinutes = extension_utcMinute.range;

;// ../../node_modules/d3-time/src/second.js



const extension_second = extension_timeInterval((date) => {
  date.setTime(date - date.getMilliseconds());
}, (date, step) => {
  date.setTime(+date + step * extension_durationSecond);
}, (start, end) => {
  return (end - start) / extension_durationSecond;
}, (date) => {
  return date.getUTCSeconds();
});

const extension_seconds = extension_second.range;

;// ../../node_modules/d3-time/src/millisecond.js


const extension_millisecond = extension_timeInterval(() => {
  // noop
}, (date, step) => {
  date.setTime(+date + step);
}, (start, end) => {
  return end - start;
});

// An optimized implementation for this simple case.
extension_millisecond.every = (k) => {
  k = Math.floor(k);
  if (!isFinite(k) || !(k > 0)) return null;
  if (!(k > 1)) return extension_millisecond;
  return extension_timeInterval((date) => {
    date.setTime(Math.floor(date / k) * k);
  }, (date, step) => {
    date.setTime(+date + step * k);
  }, (start, end) => {
    return (end - start) / k;
  });
};

const extension_milliseconds = extension_millisecond.range;

;// ../../node_modules/d3-array/src/ascending.js
function extension_ascending_ascending(a, b) {
  return a == null || b == null ? NaN : a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
}

;// ../../node_modules/d3-array/src/descending.js
function extension_descending(a, b) {
  return a == null || b == null ? NaN
    : b < a ? -1
    : b > a ? 1
    : b >= a ? 0
    : NaN;
}

;// ../../node_modules/d3-array/src/bisector.js



function extension_bisector_bisector(f) {
  let compare1, compare2, delta;

  // If an accessor is specified, promote it to a comparator. In this case we
  // can test whether the search value is (self-) comparable. We can’t do this
  // for a comparator (except for specific, known comparators) because we can’t
  // tell if the comparator is symmetric, and an asymmetric comparator can’t be
  // used to test whether a single value is comparable.
  if (f.length !== 2) {
    compare1 = extension_ascending_ascending;
    compare2 = (d, x) => extension_ascending_ascending(f(d), x);
    delta = (d, x) => f(d) - x;
  } else {
    compare1 = f === extension_ascending_ascending || f === extension_descending ? f : extension_bisector_zero;
    compare2 = f;
    delta = f;
  }

  function left(a, x, lo = 0, hi = a.length) {
    if (lo < hi) {
      if (compare1(x, x) !== 0) return hi;
      do {
        const mid = (lo + hi) >>> 1;
        if (compare2(a[mid], x) < 0) lo = mid + 1;
        else hi = mid;
      } while (lo < hi);
    }
    return lo;
  }

  function right(a, x, lo = 0, hi = a.length) {
    if (lo < hi) {
      if (compare1(x, x) !== 0) return hi;
      do {
        const mid = (lo + hi) >>> 1;
        if (compare2(a[mid], x) <= 0) lo = mid + 1;
        else hi = mid;
      } while (lo < hi);
    }
    return lo;
  }

  function center(a, x, lo = 0, hi = a.length) {
    const i = left(a, x, lo, hi - 1);
    return i > lo && delta(a[i - 1], x) > -delta(a[i], x) ? i - 1 : i;
  }

  return {left, center, right};
}

function extension_bisector_zero() {
  return 0;
}

;// ../../node_modules/vega-time/build/vega-time.module.js




const extension_YEAR = 'year';
const extension_QUARTER = 'quarter';
const extension_MONTH = 'month';
const extension_WEEK = 'week';
const extension_DATE = 'date';
const extension_DAY = 'day';
const extension_DAYOFYEAR = 'dayofyear';
const extension_HOURS = 'hours';
const extension_MINUTES = 'minutes';
const extension_SECONDS = 'seconds';
const extension_MILLISECONDS = 'milliseconds';
const extension_TIME_UNITS = [extension_YEAR, extension_QUARTER, extension_MONTH, extension_WEEK, extension_DATE, extension_DAY, extension_DAYOFYEAR, extension_HOURS, extension_MINUTES, extension_SECONDS, extension_MILLISECONDS];
const extension_UNITS = extension_TIME_UNITS.reduce((o, u, i) => (o[u] = 1 + i, o), {});
function extension_timeUnits(units) {
  const u = extension_vega_util_module_array(units).slice(),
    m = {};

  // check validity
  if (!u.length) extension_vega_util_module_error('Missing time unit.');
  u.forEach(unit => {
    if (extension_vega_util_module_has(extension_UNITS, unit)) {
      m[unit] = 1;
    } else {
      extension_vega_util_module_error(`Invalid time unit: ${unit}.`);
    }
  });
  const numTypes = (m[extension_WEEK] || m[extension_DAY] ? 1 : 0) + (m[extension_QUARTER] || m[extension_MONTH] || m[extension_DATE] ? 1 : 0) + (m[extension_DAYOFYEAR] ? 1 : 0);
  if (numTypes > 1) {
    extension_vega_util_module_error(`Incompatible time units: ${units}`);
  }

  // ensure proper sort order
  u.sort((a, b) => extension_UNITS[a] - extension_UNITS[b]);
  return u;
}
const extension_defaultSpecifiers = {
  [extension_YEAR]: '%Y ',
  [extension_QUARTER]: 'Q%q ',
  [extension_MONTH]: '%b ',
  [extension_DATE]: '%d ',
  [extension_WEEK]: 'W%U ',
  [extension_DAY]: '%a ',
  [extension_DAYOFYEAR]: '%j ',
  [extension_HOURS]: '%H:00',
  [extension_MINUTES]: '00:%M',
  [extension_SECONDS]: ':%S',
  [extension_MILLISECONDS]: '.%L',
  [`${extension_YEAR}-${extension_MONTH}`]: '%Y-%m ',
  [`${extension_YEAR}-${extension_MONTH}-${extension_DATE}`]: '%Y-%m-%d ',
  [`${extension_HOURS}-${extension_MINUTES}`]: '%H:%M'
};
function extension_timeUnitSpecifier(units, specifiers) {
  const s = extension_extend({}, extension_defaultSpecifiers, specifiers),
    u = extension_timeUnits(units),
    n = u.length;
  let fmt = '',
    start = 0,
    end,
    key;
  for (start = 0; start < n;) {
    for (end = u.length; end > start; --end) {
      key = u.slice(start, end).join('-');
      if (s[key] != null) {
        fmt += s[key];
        start = end;
        break;
      }
    }
  }
  return fmt.trim();
}

const extension_vega_time_module_t0 = new Date();
function extension_localYear(y) {
  extension_vega_time_module_t0.setFullYear(y);
  extension_vega_time_module_t0.setMonth(0);
  extension_vega_time_module_t0.setDate(1);
  extension_vega_time_module_t0.setHours(0, 0, 0, 0);
  return extension_vega_time_module_t0;
}
function extension_vega_time_module_dayofyear(d) {
  return extension_localDayOfYear(new Date(d));
}
function extension_vega_time_module_week(d) {
  return extension_localWeekNum(new Date(d));
}
function extension_localDayOfYear(d) {
  return extension_timeDay.count(extension_localYear(d.getFullYear()) - 1, d);
}
function extension_localWeekNum(d) {
  return extension_timeSunday.count(extension_localYear(d.getFullYear()) - 1, d);
}
function extension_localFirst(y) {
  return extension_localYear(y).getDay();
}
function extension_localDate(y, m, d, H, M, S, L) {
  if (0 <= y && y < 100) {
    const date = new Date(-1, m, d, H, M, S, L);
    date.setFullYear(y);
    return date;
  }
  return new Date(y, m, d, H, M, S, L);
}
function extension_vega_time_module_utcdayofyear(d) {
  return extension_utcDayOfYear(new Date(d));
}
function extension_vega_time_module_utcweek(d) {
  return extension_utcWeekNum(new Date(d));
}
function extension_utcDayOfYear(d) {
  const y = Date.UTC(d.getUTCFullYear(), 0, 1);
  return extension_utcDay.count(y - 1, d);
}
function extension_utcWeekNum(d) {
  const y = Date.UTC(d.getUTCFullYear(), 0, 1);
  return extension_utcSunday.count(y - 1, d);
}
function extension_utcFirst(y) {
  extension_vega_time_module_t0.setTime(Date.UTC(y, 0, 1));
  return extension_vega_time_module_t0.getUTCDay();
}
function extension_utcDate(y, m, d, H, M, S, L) {
  if (0 <= y && y < 100) {
    const date = new Date(Date.UTC(-1, m, d, H, M, S, L));
    date.setUTCFullYear(d.y);
    return date;
  }
  return new Date(Date.UTC(y, m, d, H, M, S, L));
}

function extension_floor(units, step, get, inv, newDate) {
  const s = step || 1,
    b = extension_peek(units),
    _ = (unit, p, key) => {
      key = key || unit;
      return extension_getUnit(get[key], inv[key], unit === b && s, p);
    };
  const t = new Date(),
    u = extension_toSet(units),
    y = u[extension_YEAR] ? _(extension_YEAR) : extension_vega_util_module_constant(2012),
    m = u[extension_MONTH] ? _(extension_MONTH) : u[extension_QUARTER] ? _(extension_QUARTER) : extension_zero,
    d = u[extension_WEEK] && u[extension_DAY] ? _(extension_DAY, 1, extension_WEEK + extension_DAY) : u[extension_WEEK] ? _(extension_WEEK, 1) : u[extension_DAY] ? _(extension_DAY, 1) : u[extension_DATE] ? _(extension_DATE, 1) : u[extension_DAYOFYEAR] ? _(extension_DAYOFYEAR, 1) : extension_one,
    H = u[extension_HOURS] ? _(extension_HOURS) : extension_zero,
    M = u[extension_MINUTES] ? _(extension_MINUTES) : extension_zero,
    S = u[extension_SECONDS] ? _(extension_SECONDS) : extension_zero,
    L = u[extension_MILLISECONDS] ? _(extension_MILLISECONDS) : extension_zero;
  return function (v) {
    t.setTime(+v);
    const year = y(t);
    return newDate(year, m(t), d(t, year), H(t), M(t), S(t), L(t));
  };
}
function extension_getUnit(f, inv, step, phase) {
  const u = step <= 1 ? f : phase ? (d, y) => phase + step * Math.floor((f(d, y) - phase) / step) : (d, y) => step * Math.floor(f(d, y) / step);
  return inv ? (d, y) => inv(u(d, y), y) : u;
}

// returns the day of the year based on week number, day of week,
// and the day of the week for the first day of the year
function extension_weekday(week, day, firstDay) {
  return day + week * 7 - (firstDay + 6) % 7;
}

// -- LOCAL TIME --

const extension_localGet = {
  [extension_YEAR]: d => d.getFullYear(),
  [extension_QUARTER]: d => Math.floor(d.getMonth() / 3),
  [extension_MONTH]: d => d.getMonth(),
  [extension_DATE]: d => d.getDate(),
  [extension_HOURS]: d => d.getHours(),
  [extension_MINUTES]: d => d.getMinutes(),
  [extension_SECONDS]: d => d.getSeconds(),
  [extension_MILLISECONDS]: d => d.getMilliseconds(),
  [extension_DAYOFYEAR]: d => extension_localDayOfYear(d),
  [extension_WEEK]: d => extension_localWeekNum(d),
  [extension_WEEK + extension_DAY]: (d, y) => extension_weekday(extension_localWeekNum(d), d.getDay(), extension_localFirst(y)),
  [extension_DAY]: (d, y) => extension_weekday(1, d.getDay(), extension_localFirst(y))
};
const extension_localInv = {
  [extension_QUARTER]: q => 3 * q,
  [extension_WEEK]: (w, y) => extension_weekday(w, 0, extension_localFirst(y))
};
function extension_timeFloor(units, step) {
  return extension_floor(units, step || 1, extension_localGet, extension_localInv, extension_localDate);
}

// -- UTC TIME --

const extension_utcGet = {
  [extension_YEAR]: d => d.getUTCFullYear(),
  [extension_QUARTER]: d => Math.floor(d.getUTCMonth() / 3),
  [extension_MONTH]: d => d.getUTCMonth(),
  [extension_DATE]: d => d.getUTCDate(),
  [extension_HOURS]: d => d.getUTCHours(),
  [extension_MINUTES]: d => d.getUTCMinutes(),
  [extension_SECONDS]: d => d.getUTCSeconds(),
  [extension_MILLISECONDS]: d => d.getUTCMilliseconds(),
  [extension_DAYOFYEAR]: d => extension_utcDayOfYear(d),
  [extension_WEEK]: d => extension_utcWeekNum(d),
  [extension_DAY]: (d, y) => extension_weekday(1, d.getUTCDay(), extension_utcFirst(y)),
  [extension_WEEK + extension_DAY]: (d, y) => extension_weekday(extension_utcWeekNum(d), d.getUTCDay(), extension_utcFirst(y))
};
const extension_utcInv = {
  [extension_QUARTER]: q => 3 * q,
  [extension_WEEK]: (w, y) => extension_weekday(w, 0, extension_utcFirst(y))
};
function extension_utcFloor(units, step) {
  return extension_floor(units, step || 1, extension_utcGet, extension_utcInv, extension_utcDate);
}

const extension_timeIntervals = {
  [extension_YEAR]: extension_timeYear,
  [extension_QUARTER]: extension_timeMonth.every(3),
  [extension_MONTH]: extension_timeMonth,
  [extension_WEEK]: extension_timeSunday,
  [extension_DATE]: extension_timeDay,
  [extension_DAY]: extension_timeDay,
  [extension_DAYOFYEAR]: extension_timeDay,
  [extension_HOURS]: extension_timeHour,
  [extension_MINUTES]: extension_timeMinute,
  [extension_SECONDS]: extension_second,
  [extension_MILLISECONDS]: extension_millisecond
};
const extension_utcIntervals = {
  [extension_YEAR]: extension_utcYear,
  [extension_QUARTER]: extension_utcMonth.every(3),
  [extension_MONTH]: extension_utcMonth,
  [extension_WEEK]: extension_utcSunday,
  [extension_DATE]: extension_utcDay,
  [extension_DAY]: extension_utcDay,
  [extension_DAYOFYEAR]: extension_utcDay,
  [extension_HOURS]: extension_utcHour,
  [extension_MINUTES]: extension_utcMinute,
  [extension_SECONDS]: extension_second,
  [extension_MILLISECONDS]: extension_millisecond
};
function extension_vega_time_module_timeInterval(unit) {
  return extension_timeIntervals[unit];
}
function extension_utcInterval(unit) {
  return extension_utcIntervals[unit];
}
function extension_offset(ival, date, step) {
  return ival ? ival.offset(date, step) : undefined;
}
function extension_timeOffset(unit, date, step) {
  return extension_offset(extension_vega_time_module_timeInterval(unit), date, step);
}
function extension_utcOffset(unit, date, step) {
  return extension_offset(extension_utcInterval(unit), date, step);
}
function extension_vega_time_module_sequence(ival, start, stop, step) {
  return ival ? ival.range(start, stop, step) : undefined;
}
function extension_timeSequence(unit, start, stop, step) {
  return extension_vega_time_module_sequence(extension_vega_time_module_timeInterval(unit), start, stop, step);
}
function extension_utcSequence(unit, start, stop, step) {
  return extension_vega_time_module_sequence(extension_utcInterval(unit), start, stop, step);
}

const extension_vega_time_module_durationSecond = 1000,
  extension_vega_time_module_durationMinute = extension_vega_time_module_durationSecond * 60,
  extension_vega_time_module_durationHour = extension_vega_time_module_durationMinute * 60,
  extension_vega_time_module_durationDay = extension_vega_time_module_durationHour * 24,
  extension_vega_time_module_durationWeek = extension_vega_time_module_durationDay * 7,
  extension_vega_time_module_durationMonth = extension_vega_time_module_durationDay * 30,
  extension_vega_time_module_durationYear = extension_vega_time_module_durationDay * 365;
const extension_Milli = [extension_YEAR, extension_MONTH, extension_DATE, extension_HOURS, extension_MINUTES, extension_SECONDS, extension_MILLISECONDS],
  extension_Seconds = extension_Milli.slice(0, -1),
  extension_Minutes = extension_Seconds.slice(0, -1),
  extension_Hours = extension_Minutes.slice(0, -1),
  extension_Day = extension_Hours.slice(0, -1),
  extension_Week = [extension_YEAR, extension_WEEK],
  extension_Month = [extension_YEAR, extension_MONTH],
  extension_Year = [extension_YEAR];
const extension_intervals = [[extension_Seconds, 1, extension_vega_time_module_durationSecond], [extension_Seconds, 5, 5 * extension_vega_time_module_durationSecond], [extension_Seconds, 15, 15 * extension_vega_time_module_durationSecond], [extension_Seconds, 30, 30 * extension_vega_time_module_durationSecond], [extension_Minutes, 1, extension_vega_time_module_durationMinute], [extension_Minutes, 5, 5 * extension_vega_time_module_durationMinute], [extension_Minutes, 15, 15 * extension_vega_time_module_durationMinute], [extension_Minutes, 30, 30 * extension_vega_time_module_durationMinute], [extension_Hours, 1, extension_vega_time_module_durationHour], [extension_Hours, 3, 3 * extension_vega_time_module_durationHour], [extension_Hours, 6, 6 * extension_vega_time_module_durationHour], [extension_Hours, 12, 12 * extension_vega_time_module_durationHour], [extension_Day, 1, extension_vega_time_module_durationDay], [extension_Week, 1, extension_vega_time_module_durationWeek], [extension_Month, 1, extension_vega_time_module_durationMonth], [extension_Month, 3, 3 * extension_vega_time_module_durationMonth], [extension_Year, 1, extension_vega_time_module_durationYear]];
function extension_vega_time_module_bin (opt) {
  const ext = opt.extent,
    max = opt.maxbins || 40,
    target = Math.abs(extension_span(ext)) / max;
  let i = extension_bisector_bisector(i => i[2]).right(extension_intervals, target),
    units,
    step;
  if (i === extension_intervals.length) {
    units = extension_Year, step = extension_tickStep(ext[0] / extension_vega_time_module_durationYear, ext[1] / extension_vega_time_module_durationYear, max);
  } else if (i) {
    i = extension_intervals[target / extension_intervals[i - 1][2] < extension_intervals[i][2] / target ? i - 1 : i];
    units = i[0];
    step = i[1];
  } else {
    units = extension_Milli;
    step = Math.max(extension_tickStep(ext[0], ext[1], max), 1);
  }
  return {
    units,
    step
  };
}



;// ../../node_modules/d3-time-format/src/locale.js


function extension_locale_localDate(d) {
  if (0 <= d.y && d.y < 100) {
    var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);
    date.setFullYear(d.y);
    return date;
  }
  return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);
}

function extension_locale_utcDate(d) {
  if (0 <= d.y && d.y < 100) {
    var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));
    date.setUTCFullYear(d.y);
    return date;
  }
  return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
}

function extension_newDate(y, m, d) {
  return {y: y, m: m, d: d, H: 0, M: 0, S: 0, L: 0};
}

function extension_formatLocale(locale) {
  var locale_dateTime = locale.dateTime,
      locale_date = locale.date,
      locale_time = locale.time,
      locale_periods = locale.periods,
      locale_weekdays = locale.days,
      locale_shortWeekdays = locale.shortDays,
      locale_months = locale.months,
      locale_shortMonths = locale.shortMonths;

  var periodRe = extension_formatRe(locale_periods),
      periodLookup = extension_formatLookup(locale_periods),
      weekdayRe = extension_formatRe(locale_weekdays),
      weekdayLookup = extension_formatLookup(locale_weekdays),
      shortWeekdayRe = extension_formatRe(locale_shortWeekdays),
      shortWeekdayLookup = extension_formatLookup(locale_shortWeekdays),
      monthRe = extension_formatRe(locale_months),
      monthLookup = extension_formatLookup(locale_months),
      shortMonthRe = extension_formatRe(locale_shortMonths),
      shortMonthLookup = extension_formatLookup(locale_shortMonths);

  var formats = {
    "a": formatShortWeekday,
    "A": formatWeekday,
    "b": formatShortMonth,
    "B": formatMonth,
    "c": null,
    "d": extension_formatDayOfMonth,
    "e": extension_formatDayOfMonth,
    "f": extension_formatMicroseconds,
    "g": extension_formatYearISO,
    "G": extension_formatFullYearISO,
    "H": extension_formatHour24,
    "I": extension_formatHour12,
    "j": extension_formatDayOfYear,
    "L": extension_formatMilliseconds,
    "m": extension_formatMonthNumber,
    "M": extension_formatMinutes,
    "p": formatPeriod,
    "q": formatQuarter,
    "Q": extension_formatUnixTimestamp,
    "s": extension_formatUnixTimestampSeconds,
    "S": extension_formatSeconds,
    "u": extension_formatWeekdayNumberMonday,
    "U": extension_formatWeekNumberSunday,
    "V": extension_formatWeekNumberISO,
    "w": extension_formatWeekdayNumberSunday,
    "W": extension_formatWeekNumberMonday,
    "x": null,
    "X": null,
    "y": extension_locale_formatYear,
    "Y": extension_formatFullYear,
    "Z": extension_formatZone,
    "%": extension_formatLiteralPercent
  };

  var utcFormats = {
    "a": formatUTCShortWeekday,
    "A": formatUTCWeekday,
    "b": formatUTCShortMonth,
    "B": formatUTCMonth,
    "c": null,
    "d": extension_formatUTCDayOfMonth,
    "e": extension_formatUTCDayOfMonth,
    "f": extension_formatUTCMicroseconds,
    "g": extension_formatUTCYearISO,
    "G": extension_formatUTCFullYearISO,
    "H": extension_formatUTCHour24,
    "I": extension_formatUTCHour12,
    "j": extension_formatUTCDayOfYear,
    "L": extension_formatUTCMilliseconds,
    "m": extension_formatUTCMonthNumber,
    "M": extension_formatUTCMinutes,
    "p": formatUTCPeriod,
    "q": formatUTCQuarter,
    "Q": extension_formatUnixTimestamp,
    "s": extension_formatUnixTimestampSeconds,
    "S": extension_formatUTCSeconds,
    "u": extension_formatUTCWeekdayNumberMonday,
    "U": extension_formatUTCWeekNumberSunday,
    "V": extension_formatUTCWeekNumberISO,
    "w": extension_formatUTCWeekdayNumberSunday,
    "W": extension_formatUTCWeekNumberMonday,
    "x": null,
    "X": null,
    "y": extension_formatUTCYear,
    "Y": extension_formatUTCFullYear,
    "Z": extension_formatUTCZone,
    "%": extension_formatLiteralPercent
  };

  var parses = {
    "a": parseShortWeekday,
    "A": parseWeekday,
    "b": parseShortMonth,
    "B": parseMonth,
    "c": parseLocaleDateTime,
    "d": extension_parseDayOfMonth,
    "e": extension_parseDayOfMonth,
    "f": extension_parseMicroseconds,
    "g": extension_parseYear,
    "G": extension_parseFullYear,
    "H": extension_parseHour24,
    "I": extension_parseHour24,
    "j": extension_parseDayOfYear,
    "L": extension_parseMilliseconds,
    "m": extension_parseMonthNumber,
    "M": extension_parseMinutes,
    "p": parsePeriod,
    "q": extension_parseQuarter,
    "Q": extension_parseUnixTimestamp,
    "s": extension_parseUnixTimestampSeconds,
    "S": extension_parseSeconds,
    "u": extension_parseWeekdayNumberMonday,
    "U": extension_parseWeekNumberSunday,
    "V": extension_parseWeekNumberISO,
    "w": extension_parseWeekdayNumberSunday,
    "W": extension_parseWeekNumberMonday,
    "x": parseLocaleDate,
    "X": parseLocaleTime,
    "y": extension_parseYear,
    "Y": extension_parseFullYear,
    "Z": extension_parseZone,
    "%": extension_parseLiteralPercent
  };

  // These recursive directive definitions must be deferred.
  formats.x = newFormat(locale_date, formats);
  formats.X = newFormat(locale_time, formats);
  formats.c = newFormat(locale_dateTime, formats);
  utcFormats.x = newFormat(locale_date, utcFormats);
  utcFormats.X = newFormat(locale_time, utcFormats);
  utcFormats.c = newFormat(locale_dateTime, utcFormats);

  function newFormat(specifier, formats) {
    return function(date) {
      var string = [],
          i = -1,
          j = 0,
          n = specifier.length,
          c,
          pad,
          format;

      if (!(date instanceof Date)) date = new Date(+date);

      while (++i < n) {
        if (specifier.charCodeAt(i) === 37) {
          string.push(specifier.slice(j, i));
          if ((pad = extension_pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);
          else pad = c === "e" ? " " : "0";
          if (format = formats[c]) c = format(date, pad);
          string.push(c);
          j = i + 1;
        }
      }

      string.push(specifier.slice(j, i));
      return string.join("");
    };
  }

  function newParse(specifier, Z) {
    return function(string) {
      var d = extension_newDate(1900, undefined, 1),
          i = parseSpecifier(d, specifier, string += "", 0),
          week, day;
      if (i != string.length) return null;

      // If a UNIX timestamp is specified, return it.
      if ("Q" in d) return new Date(d.Q);
      if ("s" in d) return new Date(d.s * 1000 + ("L" in d ? d.L : 0));

      // If this is utcParse, never use the local timezone.
      if (Z && !("Z" in d)) d.Z = 0;

      // The am-pm flag is 0 for AM, and 1 for PM.
      if ("p" in d) d.H = d.H % 12 + d.p * 12;

      // If the month was not specified, inherit from the quarter.
      if (d.m === undefined) d.m = "q" in d ? d.q : 0;

      // Convert day-of-week and week-of-year to day-of-year.
      if ("V" in d) {
        if (d.V < 1 || d.V > 53) return null;
        if (!("w" in d)) d.w = 1;
        if ("Z" in d) {
          week = extension_locale_utcDate(extension_newDate(d.y, 0, 1)), day = week.getUTCDay();
          week = day > 4 || day === 0 ? extension_utcMonday.ceil(week) : extension_utcMonday(week);
          week = extension_utcDay.offset(week, (d.V - 1) * 7);
          d.y = week.getUTCFullYear();
          d.m = week.getUTCMonth();
          d.d = week.getUTCDate() + (d.w + 6) % 7;
        } else {
          week = extension_locale_localDate(extension_newDate(d.y, 0, 1)), day = week.getDay();
          week = day > 4 || day === 0 ? extension_timeMonday.ceil(week) : extension_timeMonday(week);
          week = extension_timeDay.offset(week, (d.V - 1) * 7);
          d.y = week.getFullYear();
          d.m = week.getMonth();
          d.d = week.getDate() + (d.w + 6) % 7;
        }
      } else if ("W" in d || "U" in d) {
        if (!("w" in d)) d.w = "u" in d ? d.u % 7 : "W" in d ? 1 : 0;
        day = "Z" in d ? extension_locale_utcDate(extension_newDate(d.y, 0, 1)).getUTCDay() : extension_locale_localDate(extension_newDate(d.y, 0, 1)).getDay();
        d.m = 0;
        d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day + 5) % 7 : d.w + d.U * 7 - (day + 6) % 7;
      }

      // If a time zone is specified, all fields are interpreted as UTC and then
      // offset according to the specified time zone.
      if ("Z" in d) {
        d.H += d.Z / 100 | 0;
        d.M += d.Z % 100;
        return extension_locale_utcDate(d);
      }

      // Otherwise, all fields are in local time.
      return extension_locale_localDate(d);
    };
  }

  function parseSpecifier(d, specifier, string, j) {
    var i = 0,
        n = specifier.length,
        m = string.length,
        c,
        parse;

    while (i < n) {
      if (j >= m) return -1;
      c = specifier.charCodeAt(i++);
      if (c === 37) {
        c = specifier.charAt(i++);
        parse = parses[c in extension_pads ? specifier.charAt(i++) : c];
        if (!parse || ((j = parse(d, string, j)) < 0)) return -1;
      } else if (c != string.charCodeAt(j++)) {
        return -1;
      }
    }

    return j;
  }

  function parsePeriod(d, string, i) {
    var n = periodRe.exec(string.slice(i));
    return n ? (d.p = periodLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
  }

  function parseShortWeekday(d, string, i) {
    var n = shortWeekdayRe.exec(string.slice(i));
    return n ? (d.w = shortWeekdayLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
  }

  function parseWeekday(d, string, i) {
    var n = weekdayRe.exec(string.slice(i));
    return n ? (d.w = weekdayLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
  }

  function parseShortMonth(d, string, i) {
    var n = shortMonthRe.exec(string.slice(i));
    return n ? (d.m = shortMonthLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
  }

  function parseMonth(d, string, i) {
    var n = monthRe.exec(string.slice(i));
    return n ? (d.m = monthLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
  }

  function parseLocaleDateTime(d, string, i) {
    return parseSpecifier(d, locale_dateTime, string, i);
  }

  function parseLocaleDate(d, string, i) {
    return parseSpecifier(d, locale_date, string, i);
  }

  function parseLocaleTime(d, string, i) {
    return parseSpecifier(d, locale_time, string, i);
  }

  function formatShortWeekday(d) {
    return locale_shortWeekdays[d.getDay()];
  }

  function formatWeekday(d) {
    return locale_weekdays[d.getDay()];
  }

  function formatShortMonth(d) {
    return locale_shortMonths[d.getMonth()];
  }

  function formatMonth(d) {
    return locale_months[d.getMonth()];
  }

  function formatPeriod(d) {
    return locale_periods[+(d.getHours() >= 12)];
  }

  function formatQuarter(d) {
    return 1 + ~~(d.getMonth() / 3);
  }

  function formatUTCShortWeekday(d) {
    return locale_shortWeekdays[d.getUTCDay()];
  }

  function formatUTCWeekday(d) {
    return locale_weekdays[d.getUTCDay()];
  }

  function formatUTCShortMonth(d) {
    return locale_shortMonths[d.getUTCMonth()];
  }

  function formatUTCMonth(d) {
    return locale_months[d.getUTCMonth()];
  }

  function formatUTCPeriod(d) {
    return locale_periods[+(d.getUTCHours() >= 12)];
  }

  function formatUTCQuarter(d) {
    return 1 + ~~(d.getUTCMonth() / 3);
  }

  return {
    format: function(specifier) {
      var f = newFormat(specifier += "", formats);
      f.toString = function() { return specifier; };
      return f;
    },
    parse: function(specifier) {
      var p = newParse(specifier += "", false);
      p.toString = function() { return specifier; };
      return p;
    },
    utcFormat: function(specifier) {
      var f = newFormat(specifier += "", utcFormats);
      f.toString = function() { return specifier; };
      return f;
    },
    utcParse: function(specifier) {
      var p = newParse(specifier += "", true);
      p.toString = function() { return specifier; };
      return p;
    }
  };
}

var extension_pads = {"-": "", "_": " ", "0": "0"},
    extension_numberRe = /^\s*\d+/, // note: ignores next directive
    extension_percentRe = /^%/,
    extension_requoteRe = /[\\^$*+?|[\]().{}]/g;

function extension_locale_pad(value, fill, width) {
  var sign = value < 0 ? "-" : "",
      string = (sign ? -value : value) + "",
      length = string.length;
  return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
}

function extension_requote(s) {
  return s.replace(extension_requoteRe, "\\$&");
}

function extension_formatRe(names) {
  return new RegExp("^(?:" + names.map(extension_requote).join("|") + ")", "i");
}

function extension_formatLookup(names) {
  return new Map(names.map((name, i) => [name.toLowerCase(), i]));
}

function extension_parseWeekdayNumberSunday(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 1));
  return n ? (d.w = +n[0], i + n[0].length) : -1;
}

function extension_parseWeekdayNumberMonday(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 1));
  return n ? (d.u = +n[0], i + n[0].length) : -1;
}

function extension_parseWeekNumberSunday(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 2));
  return n ? (d.U = +n[0], i + n[0].length) : -1;
}

function extension_parseWeekNumberISO(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 2));
  return n ? (d.V = +n[0], i + n[0].length) : -1;
}

function extension_parseWeekNumberMonday(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 2));
  return n ? (d.W = +n[0], i + n[0].length) : -1;
}

function extension_parseFullYear(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 4));
  return n ? (d.y = +n[0], i + n[0].length) : -1;
}

function extension_parseYear(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 2));
  return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;
}

function extension_parseZone(d, string, i) {
  var n = /^(Z)|([+-]\d\d)(?::?(\d\d))?/.exec(string.slice(i, i + 6));
  return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
}

function extension_parseQuarter(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 1));
  return n ? (d.q = n[0] * 3 - 3, i + n[0].length) : -1;
}

function extension_parseMonthNumber(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 2));
  return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
}

function extension_parseDayOfMonth(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 2));
  return n ? (d.d = +n[0], i + n[0].length) : -1;
}

function extension_parseDayOfYear(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 3));
  return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;
}

function extension_parseHour24(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 2));
  return n ? (d.H = +n[0], i + n[0].length) : -1;
}

function extension_parseMinutes(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 2));
  return n ? (d.M = +n[0], i + n[0].length) : -1;
}

function extension_parseSeconds(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 2));
  return n ? (d.S = +n[0], i + n[0].length) : -1;
}

function extension_parseMilliseconds(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 3));
  return n ? (d.L = +n[0], i + n[0].length) : -1;
}

function extension_parseMicroseconds(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i, i + 6));
  return n ? (d.L = Math.floor(n[0] / 1000), i + n[0].length) : -1;
}

function extension_parseLiteralPercent(d, string, i) {
  var n = extension_percentRe.exec(string.slice(i, i + 1));
  return n ? i + n[0].length : -1;
}

function extension_parseUnixTimestamp(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i));
  return n ? (d.Q = +n[0], i + n[0].length) : -1;
}

function extension_parseUnixTimestampSeconds(d, string, i) {
  var n = extension_numberRe.exec(string.slice(i));
  return n ? (d.s = +n[0], i + n[0].length) : -1;
}

function extension_formatDayOfMonth(d, p) {
  return extension_locale_pad(d.getDate(), p, 2);
}

function extension_formatHour24(d, p) {
  return extension_locale_pad(d.getHours(), p, 2);
}

function extension_formatHour12(d, p) {
  return extension_locale_pad(d.getHours() % 12 || 12, p, 2);
}

function extension_formatDayOfYear(d, p) {
  return extension_locale_pad(1 + extension_timeDay.count(extension_timeYear(d), d), p, 3);
}

function extension_formatMilliseconds(d, p) {
  return extension_locale_pad(d.getMilliseconds(), p, 3);
}

function extension_formatMicroseconds(d, p) {
  return extension_formatMilliseconds(d, p) + "000";
}

function extension_formatMonthNumber(d, p) {
  return extension_locale_pad(d.getMonth() + 1, p, 2);
}

function extension_formatMinutes(d, p) {
  return extension_locale_pad(d.getMinutes(), p, 2);
}

function extension_formatSeconds(d, p) {
  return extension_locale_pad(d.getSeconds(), p, 2);
}

function extension_formatWeekdayNumberMonday(d) {
  var day = d.getDay();
  return day === 0 ? 7 : day;
}

function extension_formatWeekNumberSunday(d, p) {
  return extension_locale_pad(extension_timeSunday.count(extension_timeYear(d) - 1, d), p, 2);
}

function extension_dISO(d) {
  var day = d.getDay();
  return (day >= 4 || day === 0) ? extension_timeThursday(d) : extension_timeThursday.ceil(d);
}

function extension_formatWeekNumberISO(d, p) {
  d = extension_dISO(d);
  return extension_locale_pad(extension_timeThursday.count(extension_timeYear(d), d) + (extension_timeYear(d).getDay() === 4), p, 2);
}

function extension_formatWeekdayNumberSunday(d) {
  return d.getDay();
}

function extension_formatWeekNumberMonday(d, p) {
  return extension_locale_pad(extension_timeMonday.count(extension_timeYear(d) - 1, d), p, 2);
}

function extension_locale_formatYear(d, p) {
  return extension_locale_pad(d.getFullYear() % 100, p, 2);
}

function extension_formatYearISO(d, p) {
  d = extension_dISO(d);
  return extension_locale_pad(d.getFullYear() % 100, p, 2);
}

function extension_formatFullYear(d, p) {
  return extension_locale_pad(d.getFullYear() % 10000, p, 4);
}

function extension_formatFullYearISO(d, p) {
  var day = d.getDay();
  d = (day >= 4 || day === 0) ? extension_timeThursday(d) : extension_timeThursday.ceil(d);
  return extension_locale_pad(d.getFullYear() % 10000, p, 4);
}

function extension_formatZone(d) {
  var z = d.getTimezoneOffset();
  return (z > 0 ? "-" : (z *= -1, "+"))
      + extension_locale_pad(z / 60 | 0, "0", 2)
      + extension_locale_pad(z % 60, "0", 2);
}

function extension_formatUTCDayOfMonth(d, p) {
  return extension_locale_pad(d.getUTCDate(), p, 2);
}

function extension_formatUTCHour24(d, p) {
  return extension_locale_pad(d.getUTCHours(), p, 2);
}

function extension_formatUTCHour12(d, p) {
  return extension_locale_pad(d.getUTCHours() % 12 || 12, p, 2);
}

function extension_formatUTCDayOfYear(d, p) {
  return extension_locale_pad(1 + extension_utcDay.count(extension_utcYear(d), d), p, 3);
}

function extension_formatUTCMilliseconds(d, p) {
  return extension_locale_pad(d.getUTCMilliseconds(), p, 3);
}

function extension_formatUTCMicroseconds(d, p) {
  return extension_formatUTCMilliseconds(d, p) + "000";
}

function extension_formatUTCMonthNumber(d, p) {
  return extension_locale_pad(d.getUTCMonth() + 1, p, 2);
}

function extension_formatUTCMinutes(d, p) {
  return extension_locale_pad(d.getUTCMinutes(), p, 2);
}

function extension_formatUTCSeconds(d, p) {
  return extension_locale_pad(d.getUTCSeconds(), p, 2);
}

function extension_formatUTCWeekdayNumberMonday(d) {
  var dow = d.getUTCDay();
  return dow === 0 ? 7 : dow;
}

function extension_formatUTCWeekNumberSunday(d, p) {
  return extension_locale_pad(extension_utcSunday.count(extension_utcYear(d) - 1, d), p, 2);
}

function extension_UTCdISO(d) {
  var day = d.getUTCDay();
  return (day >= 4 || day === 0) ? extension_utcThursday(d) : extension_utcThursday.ceil(d);
}

function extension_formatUTCWeekNumberISO(d, p) {
  d = extension_UTCdISO(d);
  return extension_locale_pad(extension_utcThursday.count(extension_utcYear(d), d) + (extension_utcYear(d).getUTCDay() === 4), p, 2);
}

function extension_formatUTCWeekdayNumberSunday(d) {
  return d.getUTCDay();
}

function extension_formatUTCWeekNumberMonday(d, p) {
  return extension_locale_pad(extension_utcMonday.count(extension_utcYear(d) - 1, d), p, 2);
}

function extension_formatUTCYear(d, p) {
  return extension_locale_pad(d.getUTCFullYear() % 100, p, 2);
}

function extension_formatUTCYearISO(d, p) {
  d = extension_UTCdISO(d);
  return extension_locale_pad(d.getUTCFullYear() % 100, p, 2);
}

function extension_formatUTCFullYear(d, p) {
  return extension_locale_pad(d.getUTCFullYear() % 10000, p, 4);
}

function extension_formatUTCFullYearISO(d, p) {
  var day = d.getUTCDay();
  d = (day >= 4 || day === 0) ? extension_utcThursday(d) : extension_utcThursday.ceil(d);
  return extension_locale_pad(d.getUTCFullYear() % 10000, p, 4);
}

function extension_formatUTCZone() {
  return "+0000";
}

function extension_formatLiteralPercent() {
  return "%";
}

function extension_formatUnixTimestamp(d) {
  return +d;
}

function extension_formatUnixTimestampSeconds(d) {
  return Math.floor(+d / 1000);
}

;// ../../node_modules/d3-time-format/src/defaultLocale.js


var extension_src_defaultLocale_locale;
var extension_timeFormat;
var extension_timeParse;
var extension_utcFormat;
var extension_utcParse;

extension_defaultLocale_defaultLocale({
  dateTime: "%x, %X",
  date: "%-m/%-d/%Y",
  time: "%-I:%M:%S %p",
  periods: ["AM", "PM"],
  days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
  shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
  months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
  shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
});

function extension_defaultLocale_defaultLocale(definition) {
  extension_src_defaultLocale_locale = extension_formatLocale(definition);
  extension_timeFormat = extension_src_defaultLocale_locale.format;
  extension_timeParse = extension_src_defaultLocale_locale.parse;
  extension_utcFormat = extension_src_defaultLocale_locale.utcFormat;
  extension_utcParse = extension_src_defaultLocale_locale.utcParse;
  return extension_src_defaultLocale_locale;
}

;// ../../node_modules/vega-format/build/vega-format.module.js






function extension_vega_format_module_memoize (method) {
  const cache = {};
  return spec => cache[spec] || (cache[spec] = method(spec));
}

function extension_trimZeroes(numberFormat, decimalChar) {
  return x => {
    const str = numberFormat(x),
      dec = str.indexOf(decimalChar);
    if (dec < 0) return str;
    let idx = extension_rightmostDigit(str, dec);
    const end = idx < str.length ? str.slice(idx) : '';
    while (--idx > dec) if (str[idx] !== '0') {
      ++idx;
      break;
    }
    return str.slice(0, idx) + end;
  };
}
function extension_rightmostDigit(str, dec) {
  let i = str.lastIndexOf('e'),
    c;
  if (i > 0) return i;
  for (i = str.length; --i > dec;) {
    c = str.charCodeAt(i);
    if (c >= 48 && c <= 57) return i + 1; // is digit
  }
}
function extension_numberLocale(locale) {
  const format = extension_vega_format_module_memoize(locale.format),
    formatPrefix = locale.formatPrefix;
  return {
    format,
    formatPrefix,
    formatFloat(spec) {
      const s = extension_formatSpecifier(spec || ',');
      if (s.precision == null) {
        s.precision = 12;
        switch (s.type) {
          case '%':
            s.precision -= 2;
            break;
          case 'e':
            s.precision -= 1;
            break;
        }
        return extension_trimZeroes(format(s),
        // number format
        format('.1f')(1)[1] // decimal point character
        );
      } else {
        return format(s);
      }
    },
    formatSpan(start, stop, count, specifier) {
      specifier = extension_formatSpecifier(specifier == null ? ',f' : specifier);
      const step = extension_tickStep(start, stop, count),
        value = Math.max(Math.abs(start), Math.abs(stop));
      let precision;
      if (specifier.precision == null) {
        switch (specifier.type) {
          case 's':
            {
              if (!isNaN(precision = extension_precisionPrefix(step, value))) {
                specifier.precision = precision;
              }
              return formatPrefix(specifier, value);
            }
          case '':
          case 'e':
          case 'g':
          case 'p':
          case 'r':
            {
              if (!isNaN(precision = extension_precisionRound(step, value))) {
                specifier.precision = precision - (specifier.type === 'e');
              }
              break;
            }
          case 'f':
          case '%':
            {
              if (!isNaN(precision = extension_precisionFixed(step))) {
                specifier.precision = precision - (specifier.type === '%') * 2;
              }
              break;
            }
        }
      }
      return format(specifier);
    }
  };
}
let extension_defaultNumberLocale;
extension_resetNumberFormatDefaultLocale();
function extension_resetNumberFormatDefaultLocale() {
  return extension_defaultNumberLocale = extension_numberLocale({
    format: extension_format,
    formatPrefix: extension_formatPrefix
  });
}
function extension_numberFormatLocale(definition) {
  return extension_numberLocale(extension_locale(definition));
}
function extension_numberFormatDefaultLocale(definition) {
  return arguments.length ? extension_defaultNumberLocale = extension_numberFormatLocale(definition) : extension_defaultNumberLocale;
}

function extension_timeMultiFormat(format, interval, spec) {
  spec = spec || {};
  if (!extension_vega_util_module_isObject(spec)) {
    extension_vega_util_module_error(`Invalid time multi-format specifier: ${spec}`);
  }
  const second = interval(extension_SECONDS),
    minute = interval(extension_MINUTES),
    hour = interval(extension_HOURS),
    day = interval(extension_DATE),
    week = interval(extension_WEEK),
    month = interval(extension_MONTH),
    quarter = interval(extension_QUARTER),
    year = interval(extension_YEAR),
    L = format(spec[extension_MILLISECONDS] || '.%L'),
    S = format(spec[extension_SECONDS] || ':%S'),
    M = format(spec[extension_MINUTES] || '%I:%M'),
    H = format(spec[extension_HOURS] || '%I %p'),
    d = format(spec[extension_DATE] || spec[extension_DAY] || '%a %d'),
    w = format(spec[extension_WEEK] || '%b %d'),
    m = format(spec[extension_MONTH] || '%B'),
    q = format(spec[extension_QUARTER] || '%B'),
    y = format(spec[extension_YEAR] || '%Y');
  return date => (second(date) < date ? L : minute(date) < date ? S : hour(date) < date ? M : day(date) < date ? H : month(date) < date ? week(date) < date ? d : w : year(date) < date ? quarter(date) < date ? m : q : y)(date);
}
function extension_timeLocale(locale) {
  const timeFormat = extension_vega_format_module_memoize(locale.format),
    utcFormat = extension_vega_format_module_memoize(locale.utcFormat);
  return {
    timeFormat: spec => extension_vega_util_module_isString(spec) ? timeFormat(spec) : extension_timeMultiFormat(timeFormat, extension_vega_time_module_timeInterval, spec),
    utcFormat: spec => extension_vega_util_module_isString(spec) ? utcFormat(spec) : extension_timeMultiFormat(utcFormat, extension_utcInterval, spec),
    timeParse: extension_vega_format_module_memoize(locale.parse),
    utcParse: extension_vega_format_module_memoize(locale.utcParse)
  };
}
let extension_defaultTimeLocale;
extension_resetTimeFormatDefaultLocale();
function extension_resetTimeFormatDefaultLocale() {
  return extension_defaultTimeLocale = extension_timeLocale({
    format: extension_timeFormat,
    parse: extension_timeParse,
    utcFormat: extension_utcFormat,
    utcParse: extension_utcParse
  });
}
function extension_timeFormatLocale(definition) {
  return extension_timeLocale(extension_formatLocale(definition));
}
function extension_timeFormatDefaultLocale(definition) {
  return arguments.length ? extension_defaultTimeLocale = extension_timeFormatLocale(definition) : extension_defaultTimeLocale;
}

const extension_createLocale = (number, time) => extension_extend({}, number, time);
function extension_vega_format_module_locale(numberSpec, timeSpec) {
  const number = numberSpec ? extension_numberFormatLocale(numberSpec) : extension_numberFormatDefaultLocale();
  const time = timeSpec ? extension_timeFormatLocale(timeSpec) : extension_timeFormatDefaultLocale();
  return extension_createLocale(number, time);
}
function extension_vega_format_module_defaultLocale(numberSpec, timeSpec) {
  const args = arguments.length;
  if (args && args !== 2) {
    extension_vega_util_module_error('defaultLocale expects either zero or two arguments.');
  }
  return args ? extension_createLocale(extension_numberFormatDefaultLocale(numberSpec), extension_timeFormatDefaultLocale(timeSpec)) : extension_createLocale(extension_numberFormatDefaultLocale(), extension_timeFormatDefaultLocale());
}
function extension_resetDefaultLocale() {
  extension_resetNumberFormatDefaultLocale();
  extension_resetTimeFormatDefaultLocale();
  return extension_vega_format_module_defaultLocale();
}



;// ../../node_modules/vega-loader/build/vega-loader.browser.module.js





// Matches absolute URLs with optional protocol
//   https://...    file://...    //...
const extension_protocol_re = /^(data:|([A-Za-z]+:)?\/\/)/;

// Matches allowed URIs. From https://github.com/cure53/DOMPurify/blob/master/src/regexp.js with added file://
const extension_allowed_re = /^(?:(?:(?:f|ht)tps?|mailto|tel|callto|cid|xmpp|file|data):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i; // eslint-disable-line no-useless-escape
const extension_whitespace_re = /[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205f\u3000]/g; // eslint-disable-line no-control-regex

// Special treatment in node.js for the file: protocol
const extension_fileProtocol = 'file://';

/**
 * Factory for a loader constructor that provides methods for requesting
 * files from either the network or disk, and for sanitizing request URIs.
 * @param {function} fetch - The Fetch API for HTTP network requests.
 *   If null or undefined, HTTP loading will be disabled.
 * @param {object} fs - The file system interface for file loading.
 *   If null or undefined, local file loading will be disabled.
 * @return {function} A loader constructor with the following signature:
 *   param {object} [options] - Optional default loading options to use.
 *   return {object} - A new loader instance.
 */
function extension_loaderFactory (fetch, fs) {
  return options => ({
    options: options || {},
    sanitize: extension_sanitize,
    load: extension_vega_loader_browser_module_load,
    fileAccess: !!fs,
    file: extension_fileLoader(fs),
    http: extension_httpLoader(fetch)
  });
}

/**
 * Load an external resource, typically either from the web or from the local
 * filesystem. This function uses {@link sanitize} to first sanitize the uri,
 * then calls either {@link http} (for web requests) or {@link file} (for
 * filesystem loading).
 * @param {string} uri - The resource indicator (e.g., URL or filename).
 * @param {object} [options] - Optional loading options. These options will
 *   override any existing default options.
 * @return {Promise} - A promise that resolves to the loaded content.
 */
async function extension_vega_loader_browser_module_load(uri, options) {
  const opt = await this.sanitize(uri, options),
    url = opt.href;
  return opt.localFile ? this.file(url) : this.http(url, options);
}

/**
 * URI sanitizer function.
 * @param {string} uri - The uri (url or filename) to check.
 * @param {object} options - An options hash.
 * @return {Promise} - A promise that resolves to an object containing
 *  sanitized uri data, or rejects it the input uri is deemed invalid.
 *  The properties of the resolved object are assumed to be
 *  valid attributes for an HTML 'a' tag. The sanitized uri *must* be
 *  provided by the 'href' property of the returned object.
 */
async function extension_sanitize(uri, options) {
  options = extension_extend({}, this.options, options);
  const fileAccess = this.fileAccess,
    result = {
      href: null
    };
  let isFile, loadFile, base;
  const isAllowed = extension_allowed_re.test(uri.replace(extension_whitespace_re, ''));
  if (uri == null || typeof uri !== 'string' || !isAllowed) {
    extension_vega_util_module_error('Sanitize failure, invalid URI: ' + extension_$(uri));
  }
  const hasProtocol = extension_protocol_re.test(uri);

  // if relative url (no protocol/host), prepend baseURL
  if ((base = options.baseURL) && !hasProtocol) {
    // Ensure that there is a slash between the baseURL (e.g. hostname) and url
    if (!uri.startsWith('/') && !base.endsWith('/')) {
      uri = '/' + uri;
    }
    uri = base + uri;
  }

  // should we load from file system?
  loadFile = (isFile = uri.startsWith(extension_fileProtocol)) || options.mode === 'file' || options.mode !== 'http' && !hasProtocol && fileAccess;
  if (isFile) {
    // strip file protocol
    uri = uri.slice(extension_fileProtocol.length);
  } else if (uri.startsWith('//')) {
    if (options.defaultProtocol === 'file') {
      // if is file, strip protocol and set loadFile flag
      uri = uri.slice(2);
      loadFile = true;
    } else {
      // if relative protocol (starts with '//'), prepend default protocol
      uri = (options.defaultProtocol || 'http') + ':' + uri;
    }
  }

  // set non-enumerable mode flag to indicate local file load
  Object.defineProperty(result, 'localFile', {
    value: !!loadFile
  });

  // set uri
  result.href = uri;

  // set default result target, if specified
  if (options.target) {
    result.target = options.target + '';
  }

  // set default result rel, if specified (#1542)
  if (options.rel) {
    result.rel = options.rel + '';
  }

  // provide control over cross-origin image handling (#2238)
  // https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image
  if (options.context === 'image' && options.crossOrigin) {
    result.crossOrigin = options.crossOrigin + '';
  }

  // return
  return result;
}

/**
 * File system loader factory.
 * @param {object} fs - The file system interface.
 * @return {function} - A file loader with the following signature:
 *   param {string} filename - The file system path to load.
 *   param {string} filename - The file system path to load.
 *   return {Promise} A promise that resolves to the file contents.
 */
function extension_fileLoader(fs) {
  return fs ? filename => new Promise((accept, reject) => {
    fs.readFile(filename, (error, data) => {
      if (error) reject(error);else accept(data);
    });
  }) : extension_fileReject;
}

/**
 * Default file system loader that simply rejects.
 */
async function extension_fileReject() {
  extension_vega_util_module_error('No file system access.');
}

/**
 * HTTP request handler factory.
 * @param {function} fetch - The Fetch API method.
 * @return {function} - An http loader with the following signature:
 *   param {string} url - The url to request.
 *   param {object} options - An options hash.
 *   return {Promise} - A promise that resolves to the file contents.
 */
function extension_httpLoader(fetch) {
  return fetch ? async function (url, options) {
    const opt = extension_extend({}, this.options.http, options),
      type = options && options.response,
      response = await fetch(url, opt);
    return !response.ok ? extension_vega_util_module_error(response.status + '' + response.statusText) : extension_vega_util_module_isFunction(response[type]) ? response[type]() : response.text();
  } : extension_httpReject;
}

/**
 * Default http request handler that simply rejects.
 */
async function extension_httpReject() {
  extension_vega_util_module_error('No HTTP fetch method available.');
}

const extension_vega_loader_browser_module_isValid = _ => _ != null && _ === _;
const extension_vega_loader_browser_module_isBoolean = _ => _ === 'true' || _ === 'false' || _ === true || _ === false;
const extension_vega_loader_browser_module_isDate = _ => !Number.isNaN(Date.parse(_));
const extension_vega_loader_browser_module_isNumber = _ => !Number.isNaN(+_) && !(_ instanceof Date);
const extension_isInteger = _ => extension_vega_loader_browser_module_isNumber(_) && Number.isInteger(+_);
const extension_typeParsers = {
  boolean: extension_toBoolean,
  integer: extension_toNumber,
  number: extension_toNumber,
  date: extension_toDate,
  string: extension_vega_util_module_toString,
  unknown: extension_vega_util_module_identity
};
const extension_typeTests = [extension_vega_loader_browser_module_isBoolean, extension_isInteger, extension_vega_loader_browser_module_isNumber, extension_vega_loader_browser_module_isDate];
const extension_typeList = ['boolean', 'integer', 'number', 'date'];
function extension_inferType(values, field) {
  if (!values || !values.length) return 'unknown';
  const n = values.length,
    m = extension_typeTests.length,
    a = extension_typeTests.map((_, i) => i + 1);
  for (let i = 0, t = 0, j, value; i < n; ++i) {
    value = field ? values[i][field] : values[i];
    for (j = 0; j < m; ++j) {
      if (a[j] && extension_vega_loader_browser_module_isValid(value) && !extension_typeTests[j](value)) {
        a[j] = 0;
        ++t;
        if (t === extension_typeTests.length) return 'string';
      }
    }
  }
  return extension_typeList[a.reduce((u, v) => u === 0 ? v : u, 0) - 1];
}
function extension_inferTypes(data, fields) {
  return fields.reduce((types, field) => {
    types[field] = extension_inferType(data, field);
    return types;
  }, {});
}

function extension_delimitedFormat(delimiter) {
  const parse = function (data, format) {
    const delim = {
      delimiter: delimiter
    };
    return extension_vega_loader_browser_module_dsv(data, format ? extension_extend(format, delim) : delim);
  };
  parse.responseType = 'text';
  return parse;
}
function extension_vega_loader_browser_module_dsv(data, format) {
  if (format.header) {
    data = format.header.map(extension_$).join(format.delimiter) + '\n' + data;
  }
  return extension_dsv(format.delimiter).parse(data + '');
}
extension_vega_loader_browser_module_dsv.responseType = 'text';

function extension_isBuffer(_) {
  return typeof Buffer === 'function' && extension_vega_util_module_isFunction(Buffer.isBuffer) ? Buffer.isBuffer(_) : false;
}
function extension_vega_loader_browser_module_json(data, format) {
  const prop = format && format.property ? extension_vega_util_module_field(format.property) : extension_vega_util_module_identity;
  return extension_vega_util_module_isObject(data) && !extension_isBuffer(data) ? extension_vega_loader_browser_module_parseJSON(prop(data), format) : prop(JSON.parse(data));
}
extension_vega_loader_browser_module_json.responseType = 'json';
function extension_vega_loader_browser_module_parseJSON(data, format) {
  if (!extension_vega_util_module_isArray(data) && extension_vega_util_module_isIterable(data)) {
    data = [...data];
  }
  return format && format.copy ? JSON.parse(JSON.stringify(data)) : data;
}

const extension_filters = {
  interior: (a, b) => a !== b,
  exterior: (a, b) => a === b
};
function extension_topojson(data, format) {
  let method, object, property, filter;
  data = extension_vega_loader_browser_module_json(data, format);
  if (format && format.feature) {
    method = extension_feature;
    property = format.feature;
  } else if (format && format.mesh) {
    method = extension_mesh;
    property = format.mesh;
    filter = extension_filters[format.filter];
  } else {
    extension_vega_util_module_error('Missing TopoJSON feature or mesh parameter.');
  }
  object = (object = data.objects[property]) ? method(data, object, filter) : extension_vega_util_module_error('Invalid TopoJSON object: ' + property);
  return object && object.features || [object];
}
extension_topojson.responseType = 'json';

const extension_vega_loader_browser_module_format = {
  dsv: extension_vega_loader_browser_module_dsv,
  csv: extension_delimitedFormat(','),
  tsv: extension_delimitedFormat('\t'),
  json: extension_vega_loader_browser_module_json,
  topojson: extension_topojson
};
function extension_vega_loader_browser_module_formats(name, reader) {
  if (arguments.length > 1) {
    extension_vega_loader_browser_module_format[name] = reader;
    return this;
  } else {
    return extension_vega_util_module_has(extension_vega_loader_browser_module_format, name) ? extension_vega_loader_browser_module_format[name] : null;
  }
}
function extension_responseType(type) {
  const f = extension_vega_loader_browser_module_formats(type);
  return f && f.responseType || 'text';
}

function extension_read (data, schema, timeParser, utcParser) {
  schema = schema || {};
  const reader = extension_vega_loader_browser_module_formats(schema.type || 'json');
  if (!reader) extension_vega_util_module_error('Unknown data format type: ' + schema.type);
  data = reader(data, schema);
  if (schema.parse) extension_vega_loader_browser_module_parse(data, schema.parse, timeParser, utcParser);
  if (extension_vega_util_module_has(data, 'columns')) delete data.columns;
  return data;
}
function extension_vega_loader_browser_module_parse(data, types, timeParser, utcParser) {
  if (!data.length) return; // early exit for empty data

  const locale = extension_timeFormatDefaultLocale();
  timeParser = timeParser || locale.timeParse;
  utcParser = utcParser || locale.utcParse;
  let fields = data.columns || Object.keys(data[0]),
    datum,
    field,
    i,
    j,
    n,
    m;
  if (types === 'auto') types = extension_inferTypes(data, fields);
  fields = Object.keys(types);
  const parsers = fields.map(field => {
    const type = types[field];
    let parts, pattern;
    if (type && (type.startsWith('date:') || type.startsWith('utc:'))) {
      parts = type.split(/:(.+)?/, 2); // split on first :
      pattern = parts[1];
      if (pattern[0] === '\'' && pattern[pattern.length - 1] === '\'' || pattern[0] === '"' && pattern[pattern.length - 1] === '"') {
        pattern = pattern.slice(1, -1);
      }
      const parse = parts[0] === 'utc' ? utcParser : timeParser;
      return parse(pattern);
    }
    if (!extension_typeParsers[type]) {
      throw Error('Illegal format pattern: ' + field + ':' + type);
    }
    return extension_typeParsers[type];
  });
  for (i = 0, n = data.length, m = fields.length; i < n; ++i) {
    datum = data[i];
    for (j = 0; j < m; ++j) {
      field = fields[j];
      datum[field] = parsers[j](datum[field]);
    }
  }
}

const extension_loader = extension_loaderFactory(typeof fetch !== 'undefined' && fetch,
// use built-in fetch API
null // no file system access
);



;// ../../node_modules/vega-dataflow/build/vega-dataflow.module.js




function extension_UniqueList(idFunc) {
  const $ = idFunc || extension_vega_util_module_identity,
    list = [],
    ids = {};
  list.add = _ => {
    const id = $(_);
    if (!ids[id]) {
      ids[id] = 1;
      list.push(_);
    }
    return list;
  };
  list.remove = _ => {
    const id = $(_);
    if (ids[id]) {
      ids[id] = 0;
      const idx = list.indexOf(_);
      if (idx >= 0) list.splice(idx, 1);
    }
    return list;
  };
  return list;
}

/**
 * Invoke and await a potentially async callback function. If
 * an error occurs, trap it and route to Dataflow.error.
 * @param {Dataflow} df - The dataflow instance
 * @param {function} callback - A callback function to invoke
 *   and then await. The dataflow will be passed as the single
 *   argument to the function.
 */
async function extension_asyncCallback (df, callback) {
  try {
    await callback(df);
  } catch (err) {
    df.error(err);
  }
}

const extension_TUPLE_ID_KEY = Symbol('vega_id');
let extension_TUPLE_ID = 1;

/**
 * Checks if an input value is a registered tuple.
 * @param {*} t - The value to check.
 * @return {boolean} True if the input is a tuple, false otherwise.
 */
function extension_isTuple(t) {
  return !!(t && extension_tupleid(t));
}

/**
 * Returns the id of a tuple.
 * @param {object} t - The input tuple.
 * @return {*} the tuple id.
 */
function extension_tupleid(t) {
  return t[extension_TUPLE_ID_KEY];
}

/**
 * Sets the id of a tuple.
 * @param {object} t - The input tuple.
 * @param {*} id - The id value to set.
 * @return {object} the input tuple.
 */
function extension_setid(t, id) {
  t[extension_TUPLE_ID_KEY] = id;
  return t;
}

/**
 * Ingest an object or value as a data tuple.
 * If the input value is an object, an id field will be added to it. For
 * efficiency, the input object is modified directly. A copy is not made.
 * If the input value is a literal, it will be wrapped in a new object
 * instance, with the value accessible as the 'data' property.
 * @param datum - The value to ingest.
 * @return {object} The ingested data tuple.
 */
function extension_ingest$1(datum) {
  const t = datum === Object(datum) ? datum : {
    data: datum
  };
  return extension_tupleid(t) ? t : extension_setid(t, extension_TUPLE_ID++);
}

/**
 * Given a source tuple, return a derived copy.
 * @param {object} t - The source tuple.
 * @return {object} The derived tuple.
 */
function extension_vega_dataflow_module_derive(t) {
  return extension_rederive(t, extension_ingest$1({}));
}

/**
 * Rederive a derived tuple by copying values from the source tuple.
 * @param {object} t - The source tuple.
 * @param {object} d - The derived tuple.
 * @return {object} The derived tuple.
 */
function extension_rederive(t, d) {
  for (const k in t) d[k] = t[k];
  return d;
}

/**
 * Replace an existing tuple with a new tuple.
 * @param {object} t - The existing data tuple.
 * @param {object} d - The new tuple that replaces the old.
 * @return {object} The new tuple.
 */
function extension_replace(t, d) {
  return extension_setid(d, extension_tupleid(t));
}

/**
 * Generate an augmented comparator function that provides stable
 * sorting by tuple id when the given comparator produces ties.
 * @param {function} cmp - The comparator to augment.
 * @param {function} [f] - Optional tuple accessor function.
 * @return {function} An augmented comparator function.
 */
function extension_stableCompare(cmp, f) {
  return !cmp ? null : f ? (a, b) => cmp(a, b) || extension_tupleid(f(a)) - extension_tupleid(f(b)) : (a, b) => cmp(a, b) || extension_tupleid(a) - extension_tupleid(b);
}

function extension_isChangeSet(v) {
  return v && v.constructor === extension_changeset;
}
function extension_changeset() {
  const add = [],
    // insert tuples
    rem = [],
    // remove tuples
    mod = [],
    // modify tuples
    remp = [],
    // remove by predicate
    modp = []; // modify by predicate
  let clean = null,
    reflow = false;
  return {
    constructor: extension_changeset,
    insert(t) {
      const d = extension_vega_util_module_array(t),
        n = d.length;
      for (let i = 0; i < n; ++i) add.push(d[i]);
      return this;
    },
    remove(t) {
      const a = extension_vega_util_module_isFunction(t) ? remp : rem,
        d = extension_vega_util_module_array(t),
        n = d.length;
      for (let i = 0; i < n; ++i) a.push(d[i]);
      return this;
    },
    modify(t, field, value) {
      const m = {
        field: field,
        value: extension_vega_util_module_constant(value)
      };
      if (extension_vega_util_module_isFunction(t)) {
        m.filter = t;
        modp.push(m);
      } else {
        m.tuple = t;
        mod.push(m);
      }
      return this;
    },
    encode(t, set) {
      if (extension_vega_util_module_isFunction(t)) modp.push({
        filter: t,
        field: set
      });else mod.push({
        tuple: t,
        field: set
      });
      return this;
    },
    clean(value) {
      clean = value;
      return this;
    },
    reflow() {
      reflow = true;
      return this;
    },
    pulse(pulse, tuples) {
      const cur = {},
        out = {};
      let i, n, m, f, t, id;

      // build lookup table of current tuples
      for (i = 0, n = tuples.length; i < n; ++i) {
        cur[extension_tupleid(tuples[i])] = 1;
      }

      // process individual tuples to remove
      for (i = 0, n = rem.length; i < n; ++i) {
        t = rem[i];
        cur[extension_tupleid(t)] = -1;
      }

      // process predicate-based removals
      for (i = 0, n = remp.length; i < n; ++i) {
        f = remp[i];
        tuples.forEach(t => {
          if (f(t)) cur[extension_tupleid(t)] = -1;
        });
      }

      // process all add tuples
      for (i = 0, n = add.length; i < n; ++i) {
        t = add[i];
        id = extension_tupleid(t);
        if (cur[id]) {
          // tuple already resides in dataset
          // if flagged for both add and remove, cancel
          cur[id] = 1;
        } else {
          // tuple does not reside in dataset, add
          pulse.add.push(extension_ingest$1(add[i]));
        }
      }

      // populate pulse rem list
      for (i = 0, n = tuples.length; i < n; ++i) {
        t = tuples[i];
        if (cur[extension_tupleid(t)] < 0) pulse.rem.push(t);
      }

      // modify helper method
      function modify(t, f, v) {
        if (v) {
          t[f] = v(t);
        } else {
          pulse.encode = f;
        }
        if (!reflow) out[extension_tupleid(t)] = t;
      }

      // process individual tuples to modify
      for (i = 0, n = mod.length; i < n; ++i) {
        m = mod[i];
        t = m.tuple;
        f = m.field;
        id = cur[extension_tupleid(t)];
        if (id > 0) {
          modify(t, f, m.value);
          pulse.modifies(f);
        }
      }

      // process predicate-based modifications
      for (i = 0, n = modp.length; i < n; ++i) {
        m = modp[i];
        f = m.filter;
        tuples.forEach(t => {
          if (f(t) && cur[extension_tupleid(t)] > 0) {
            modify(t, m.field, m.value);
          }
        });
        pulse.modifies(m.field);
      }

      // upon reflow request, populate mod with all non-removed tuples
      // otherwise, populate mod with modified tuples only
      if (reflow) {
        pulse.mod = rem.length || remp.length ? tuples.filter(t => cur[extension_tupleid(t)] > 0) : tuples.slice();
      } else {
        for (id in out) pulse.mod.push(out[id]);
      }

      // set pulse garbage collection request
      if (clean || clean == null && (rem.length || remp.length)) {
        pulse.clean(true);
      }
      return pulse;
    }
  };
}

const extension_CACHE = '_:mod:_';

/**
 * Hash that tracks modifications to assigned values.
 * Callers *must* use the set method to update values.
 */
function extension_Parameters() {
  Object.defineProperty(this, extension_CACHE, {
    writable: true,
    value: {}
  });
}
extension_Parameters.prototype = {
  /**
   * Set a parameter value. If the parameter value changes, the parameter
   * will be recorded as modified.
   * @param {string} name - The parameter name.
   * @param {number} index - The index into an array-value parameter. Ignored if
   *   the argument is undefined, null or less than zero.
   * @param {*} value - The parameter value to set.
   * @param {boolean} [force=false] - If true, records the parameter as modified
   *   even if the value is unchanged.
   * @return {Parameters} - This parameter object.
   */
  set(name, index, value, force) {
    const o = this,
      v = o[name],
      mod = o[extension_CACHE];
    if (index != null && index >= 0) {
      if (v[index] !== value || force) {
        v[index] = value;
        mod[index + ':' + name] = -1;
        mod[name] = -1;
      }
    } else if (v !== value || force) {
      o[name] = value;
      mod[name] = extension_vega_util_module_isArray(value) ? 1 + value.length : -1;
    }
    return o;
  },
  /**
   * Tests if one or more parameters has been modified. If invoked with no
   * arguments, returns true if any parameter value has changed. If the first
   * argument is array, returns trues if any parameter name in the array has
   * changed. Otherwise, tests if the given name and optional array index has
   * changed.
   * @param {string} name - The parameter name to test.
   * @param {number} [index=undefined] - The parameter array index to test.
   * @return {boolean} - Returns true if a queried parameter was modified.
   */
  modified(name, index) {
    const mod = this[extension_CACHE];
    if (!arguments.length) {
      for (const k in mod) {
        if (mod[k]) return true;
      }
      return false;
    } else if (extension_vega_util_module_isArray(name)) {
      for (let k = 0; k < name.length; ++k) {
        if (mod[name[k]]) return true;
      }
      return false;
    }
    return index != null && index >= 0 ? index + 1 < mod[name] || !!mod[index + ':' + name] : !!mod[name];
  },
  /**
   * Clears the modification records. After calling this method,
   * all parameters are considered unmodified.
   */
  clear() {
    this[extension_CACHE] = {};
    return this;
  }
};

let extension_OP_ID = 0;
const extension_PULSE = 'pulse',
  extension_NO_PARAMS = new extension_Parameters();

// Boolean Flags
const extension_SKIP$1 = 1,
  extension_MODIFIED = 2;

/**
 * An Operator is a processing node in a dataflow graph.
 * Each operator stores a value and an optional value update function.
 * Operators can accept a hash of named parameters. Parameter values can
 * either be direct (JavaScript literals, arrays, objects) or indirect
 * (other operators whose values will be pulled dynamically). Operators
 * included as parameters will have this operator added as a dependency.
 * @constructor
 * @param {*} [init] - The initial value for this operator.
 * @param {function(object, Pulse)} [update] - An update function. Upon
 *   evaluation of this operator, the update function will be invoked and the
 *   return value will be used as the new value of this operator.
 * @param {object} [params] - The parameters for this operator.
 * @param {boolean} [react=true] - Flag indicating if this operator should
 *   listen for changes to upstream operators included as parameters.
 * @see parameters
 */
function extension_Operator(init, update, params, react) {
  this.id = ++extension_OP_ID;
  this.value = init;
  this.stamp = -1;
  this.rank = -1;
  this.qrank = -1;
  this.flags = 0;
  if (update) {
    this._update = update;
  }
  if (params) this.parameters(params, react);
}
function extension_flag(bit) {
  return function (state) {
    const f = this.flags;
    if (arguments.length === 0) return !!(f & bit);
    this.flags = state ? f | bit : f & ~bit;
    return this;
  };
}
extension_Operator.prototype = {
  /**
   * Returns a list of target operators dependent on this operator.
   * If this list does not exist, it is created and then returned.
   * @return {UniqueList}
   */
  targets() {
    return this._targets || (this._targets = extension_UniqueList(extension_id));
  },
  /**
   * Sets the value of this operator.
   * @param {*} value - the value to set.
   * @return {Number} Returns 1 if the operator value has changed
   *   according to strict equality, returns 0 otherwise.
   */
  set(value) {
    if (this.value !== value) {
      this.value = value;
      return 1;
    } else {
      return 0;
    }
  },
  /**
   * Indicates that operator evaluation should be skipped on the next pulse.
   * This operator will still propagate incoming pulses, but its update function
   * will not be invoked. The skip flag is reset after every pulse, so calling
   * this method will affect processing of the next pulse only.
   */
  skip: extension_flag(extension_SKIP$1),
  /**
   * Indicates that this operator's value has been modified on its most recent
   * pulse. Normally modification is checked via strict equality; however, in
   * some cases it is more efficient to update the internal state of an object.
   * In those cases, the modified flag can be used to trigger propagation. Once
   * set, the modification flag persists across pulses until unset. The flag can
   * be used with the last timestamp to test if a modification is recent.
   */
  modified: extension_flag(extension_MODIFIED),
  /**
   * Sets the parameters for this operator. The parameter values are analyzed for
   * operator instances. If found, this operator will be added as a dependency
   * of the parameterizing operator. Operator values are dynamically marshalled
   * from each operator parameter prior to evaluation. If a parameter value is
   * an array, the array will also be searched for Operator instances. However,
   * the search does not recurse into sub-arrays or object properties.
   * @param {object} params - A hash of operator parameters.
   * @param {boolean} [react=true] - A flag indicating if this operator should
   *   automatically update (react) when parameter values change. In other words,
   *   this flag determines if the operator registers itself as a listener on
   *   any upstream operators included in the parameters.
   * @param {boolean} [initonly=false] - A flag indicating if this operator
   *   should calculate an update only upon its initial evaluation, then
   *   deregister dependencies and suppress all future update invocations.
   * @return {Operator[]} - An array of upstream dependencies.
   */
  parameters(params, react, initonly) {
    react = react !== false;
    const argval = this._argval = this._argval || new extension_Parameters(),
      argops = this._argops = this._argops || [],
      deps = [];
    let name, value, n, i;
    const add = (name, index, value) => {
      if (value instanceof extension_Operator) {
        if (value !== this) {
          if (react) value.targets().add(this);
          deps.push(value);
        }
        argops.push({
          op: value,
          name: name,
          index: index
        });
      } else {
        argval.set(name, index, value);
      }
    };
    for (name in params) {
      value = params[name];
      if (name === extension_PULSE) {
        extension_vega_util_module_array(value).forEach(op => {
          if (!(op instanceof extension_Operator)) {
            extension_vega_util_module_error('Pulse parameters must be operator instances.');
          } else if (op !== this) {
            op.targets().add(this);
            deps.push(op);
          }
        });
        this.source = value;
      } else if (extension_vega_util_module_isArray(value)) {
        argval.set(name, -1, Array(n = value.length));
        for (i = 0; i < n; ++i) add(name, i, value[i]);
      } else {
        add(name, -1, value);
      }
    }
    this.marshall().clear(); // initialize values
    if (initonly) argops.initonly = true;
    return deps;
  },
  /**
   * Internal method for marshalling parameter values.
   * Visits each operator dependency to pull the latest value.
   * @return {Parameters} A Parameters object to pass to the update function.
   */
  marshall(stamp) {
    const argval = this._argval || extension_NO_PARAMS,
      argops = this._argops;
    let item, i, op, mod;
    if (argops) {
      const n = argops.length;
      for (i = 0; i < n; ++i) {
        item = argops[i];
        op = item.op;
        mod = op.modified() && op.stamp === stamp;
        argval.set(item.name, item.index, op.value, mod);
      }
      if (argops.initonly) {
        for (i = 0; i < n; ++i) {
          item = argops[i];
          item.op.targets().remove(this);
        }
        this._argops = null;
        this._update = null;
      }
    }
    return argval;
  },
  /**
   * Detach this operator from the dataflow.
   * Unregisters listeners on upstream dependencies.
   */
  detach() {
    const argops = this._argops;
    let i, n, item, op;
    if (argops) {
      for (i = 0, n = argops.length; i < n; ++i) {
        item = argops[i];
        op = item.op;
        if (op._targets) {
          op._targets.remove(this);
        }
      }
    }

    // remove references to the source and pulse object,
    // if present, to prevent memory leaks of old data.
    this.pulse = null;
    this.source = null;
  },
  /**
   * Delegate method to perform operator processing.
   * Subclasses can override this method to perform custom processing.
   * By default, it marshalls parameters and calls the update function
   * if that function is defined. If the update function does not
   * change the operator value then StopPropagation is returned.
   * If no update function is defined, this method does nothing.
   * @param {Pulse} pulse - the current dataflow pulse.
   * @return The output pulse or StopPropagation. A falsy return value
   *   (including undefined) will let the input pulse pass through.
   */
  evaluate(pulse) {
    const update = this._update;
    if (update) {
      const params = this.marshall(pulse.stamp),
        v = update.call(this, params, pulse);
      params.clear();
      if (v !== this.value) {
        this.value = v;
      } else if (!this.modified()) {
        return pulse.StopPropagation;
      }
    }
  },
  /**
   * Run this operator for the current pulse. If this operator has already
   * been run at (or after) the pulse timestamp, returns StopPropagation.
   * Internally, this method calls {@link evaluate} to perform processing.
   * If {@link evaluate} returns a falsy value, the input pulse is returned.
   * This method should NOT be overridden, instead overrride {@link evaluate}.
   * @param {Pulse} pulse - the current dataflow pulse.
   * @return the output pulse for this operator (or StopPropagation)
   */
  run(pulse) {
    if (pulse.stamp < this.stamp) return pulse.StopPropagation;
    let rv;
    if (this.skip()) {
      this.skip(false);
      rv = 0;
    } else {
      rv = this.evaluate(pulse);
    }
    return this.pulse = rv || pulse;
  }
};

/**
 * Add an operator to the dataflow graph. This function accepts a
 * variety of input argument types. The basic signature supports an
 * initial value, update function and parameters. If the first parameter
 * is an Operator instance, it will be added directly. If it is a
 * constructor for an Operator subclass, a new instance will be instantiated.
 * Otherwise, if the first parameter is a function instance, it will be used
 * as the update function and a null initial value is assumed.
 * @param {*} init - One of: the operator to add, the initial value of
 *   the operator, an operator class to instantiate, or an update function.
 * @param {function} [update] - The operator update function.
 * @param {object} [params] - The operator parameters.
 * @param {boolean} [react=true] - Flag indicating if this operator should
 *   listen for changes to upstream operators included as parameters.
 * @return {Operator} - The added operator.
 */
function extension_add (init, update, params, react) {
  let shift = 1,
    op;
  if (init instanceof extension_Operator) {
    op = init;
  } else if (init && init.prototype instanceof extension_Operator) {
    op = new init();
  } else if (extension_vega_util_module_isFunction(init)) {
    op = new extension_Operator(null, init);
  } else {
    shift = 0;
    op = new extension_Operator(init, update);
  }
  this.rank(op);
  if (shift) {
    react = params;
    params = update;
  }
  if (params) this.connect(op, op.parameters(params, react));
  this.touch(op);
  return op;
}

/**
 * Connect a target operator as a dependent of source operators.
 * If necessary, this method will rerank the target operator and its
 * dependents to ensure propagation proceeds in a topologically sorted order.
 * @param {Operator} target - The target operator.
 * @param {Array<Operator>} - The source operators that should propagate
 *   to the target operator.
 */
function extension_connect (target, sources) {
  const targetRank = target.rank,
    n = sources.length;
  for (let i = 0; i < n; ++i) {
    if (targetRank < sources[i].rank) {
      this.rerank(target);
      return;
    }
  }
}

let extension_STREAM_ID = 0;

/**
 * Models an event stream.
 * @constructor
 * @param {function(Object, number): boolean} [filter] - Filter predicate.
 *   Events pass through when truthy, events are suppressed when falsy.
 * @param {function(Object): *} [apply] - Applied to input events to produce
 *   new event values.
 * @param {function(Object)} [receive] - Event callback function to invoke
 *   upon receipt of a new event. Use to override standard event processing.
 */
function extension_EventStream(filter, apply, receive) {
  this.id = ++extension_STREAM_ID;
  this.value = null;
  if (receive) this.receive = receive;
  if (filter) this._filter = filter;
  if (apply) this._apply = apply;
}

/**
 * Creates a new event stream instance with the provided
 * (optional) filter, apply and receive functions.
 * @param {function(Object, number): boolean} [filter] - Filter predicate.
 *   Events pass through when truthy, events are suppressed when falsy.
 * @param {function(Object): *} [apply] - Applied to input events to produce
 *   new event values.
 * @see EventStream
 */
function extension_stream(filter, apply, receive) {
  return new extension_EventStream(filter, apply, receive);
}
extension_EventStream.prototype = {
  _filter: extension_truthy,
  _apply: extension_vega_util_module_identity,
  targets() {
    return this._targets || (this._targets = extension_UniqueList(extension_id));
  },
  consume(_) {
    if (!arguments.length) return !!this._consume;
    this._consume = !!_;
    return this;
  },
  receive(evt) {
    if (this._filter(evt)) {
      const val = this.value = this._apply(evt),
        trg = this._targets,
        n = trg ? trg.length : 0;
      for (let i = 0; i < n; ++i) trg[i].receive(val);
      if (this._consume) {
        evt.preventDefault();
        evt.stopPropagation();
      }
    }
  },
  filter(filter) {
    const s = extension_stream(filter);
    this.targets().add(s);
    return s;
  },
  apply(apply) {
    const s = extension_stream(null, apply);
    this.targets().add(s);
    return s;
  },
  merge() {
    const s = extension_stream();
    this.targets().add(s);
    for (let i = 0, n = arguments.length; i < n; ++i) {
      arguments[i].targets().add(s);
    }
    return s;
  },
  throttle(pause) {
    let t = -1;
    return this.filter(() => {
      const now = Date.now();
      if (now - t > pause) {
        t = now;
        return 1;
      } else {
        return 0;
      }
    });
  },
  debounce(delay) {
    const s = extension_stream();
    this.targets().add(extension_stream(null, null, extension_debounce(delay, e => {
      const df = e.dataflow;
      s.receive(e);
      if (df && df.run) df.run();
    })));
    return s;
  },
  between(a, b) {
    let active = false;
    a.targets().add(extension_stream(null, null, () => active = true));
    b.targets().add(extension_stream(null, null, () => active = false));
    return this.filter(() => active);
  },
  detach() {
    // ensures compatibility with operators (#2753)
    // remove references to other streams and filter functions that may
    // be bound to subcontexts that need to be garbage collected.
    this._filter = extension_truthy;
    this._targets = null;
  }
};

/**
 * Create a new event stream from an event source.
 * @param {object} source - The event source to monitor. The input must
 *  support the addEventListener method.
 * @param {string} type - The event type.
 * @param {function(object): boolean} [filter] - Event filter function.
 * @param {function(object): *} [apply] - Event application function.
 *   If provided, this function will be invoked and the result will be
 *   used as the downstream event value.
 * @return {EventStream}
 */
function extension_events (source, type, filter, apply) {
  const df = this,
    s = extension_stream(filter, apply),
    send = function (e) {
      e.dataflow = df;
      try {
        s.receive(e);
      } catch (error) {
        df.error(error);
      } finally {
        df.run();
      }
    };
  let sources;
  if (typeof source === 'string' && typeof document !== 'undefined') {
    sources = document.querySelectorAll(source);
  } else {
    sources = extension_vega_util_module_array(source);
  }
  const n = sources.length;
  for (let i = 0; i < n; ++i) {
    sources[i].addEventListener(type, send);
  }
  return s;
}

function extension_vega_dataflow_module_parse(data, format) {
  const locale = this.locale();
  return extension_read(data, format, locale.timeParse, locale.utcParse);
}

/**
 * Ingests new data into the dataflow. First parses the data using the
 * vega-loader read method, then pulses a changeset to the target operator.
 * @param {Operator} target - The Operator to target with ingested data,
 *   typically a Collect transform instance.
 * @param {*} data - The input data, prior to parsing. For JSON this may
 *   be a string or an object. For CSV, TSV, etc should be a string.
 * @param {object} format - The data format description for parsing
 *   loaded data. This object is passed to the vega-loader read method.
 * @returns {Dataflow}
 */
function extension_ingest(target, data, format) {
  data = this.parse(data, format);
  return this.pulse(target, this.changeset().insert(data));
}

/**
 * Request data from an external source, parse it, and return a Promise.
 * @param {string} url - The URL from which to load the data. This string
 *   is passed to the vega-loader load method.
 * @param {object} [format] - The data format description for parsing
 *   loaded data. This object is passed to the vega-loader read method.
 * @return {Promise} A Promise that resolves upon completion of the request.
 *   The resolved object contains the following properties:
 *   - data: an array of parsed data (or null upon error)
 *   - status: a code for success (0), load fail (-1), or parse fail (-2)
 */
async function extension_request(url, format) {
  const df = this;
  let status = 0,
    data;
  try {
    data = await df.loader().load(url, {
      context: 'dataflow',
      response: extension_responseType(format && format.type)
    });
    try {
      data = df.parse(data, format);
    } catch (err) {
      status = -2;
      df.warn('Data ingestion failed', url, err);
    }
  } catch (err) {
    status = -1;
    df.warn('Loading failed', url, err);
  }
  return {
    data,
    status
  };
}
async function extension_preload(target, url, format) {
  const df = this,
    pending = df._pending || extension_loadPending(df);
  pending.requests += 1;
  const res = await df.request(url, format);
  df.pulse(target, df.changeset().remove(extension_truthy).insert(res.data || []));
  pending.done();
  return res;
}
function extension_loadPending(df) {
  let accept;
  const pending = new Promise(a => accept = a);
  pending.requests = 0;
  pending.done = () => {
    if (--pending.requests === 0) {
      df._pending = null;
      accept(df);
    }
  };
  return df._pending = pending;
}

const extension_SKIP = {
  skip: true
};

/**
 * Perform operator updates in response to events. Applies an
 * update function to compute a new operator value. If the update function
 * returns a {@link ChangeSet}, the operator will be pulsed with those tuple
 * changes. Otherwise, the operator value will be updated to the return value.
 * @param {EventStream|Operator} source - The event source to react to.
 *   This argument can be either an EventStream or an Operator.
 * @param {Operator|function(object):Operator} target - The operator to update.
 *   This argument can either be an Operator instance or (if the source
 *   argument is an EventStream), a function that accepts an event object as
 *   input and returns an Operator to target.
 * @param {function(Parameters,Event): *} [update] - Optional update function
 *   to compute the new operator value, or a literal value to set. Update
 *   functions expect to receive a parameter object and event as arguments.
 *   This function can either return a new operator value or (if the source
 *   argument is an EventStream) a {@link ChangeSet} instance to pulse
 *   the target operator with tuple changes.
 * @param {object} [params] - The update function parameters.
 * @param {object} [options] - Additional options hash. If not overridden,
 *   updated operators will be skipped by default.
 * @param {boolean} [options.skip] - If true, the operator will
 *  be skipped: it will not be evaluated, but its dependents will be.
 * @param {boolean} [options.force] - If true, the operator will
 *   be re-evaluated even if its value has not changed.
 * @return {Dataflow}
 */
function extension_on (source, target, update, params, options) {
  const fn = source instanceof extension_Operator ? extension_onOperator : extension_onStream;
  fn(this, source, target, update, params, options);
  return this;
}
function extension_onStream(df, stream, target, update, params, options) {
  const opt = extension_extend({}, options, extension_SKIP);
  let func, op;
  if (!extension_vega_util_module_isFunction(target)) target = extension_vega_util_module_constant(target);
  if (update === undefined) {
    func = e => df.touch(target(e));
  } else if (extension_vega_util_module_isFunction(update)) {
    op = new extension_Operator(null, update, params, false);
    func = e => {
      op.evaluate(e);
      const t = target(e),
        v = op.value;
      extension_isChangeSet(v) ? df.pulse(t, v, options) : df.update(t, v, opt);
    };
  } else {
    func = e => df.update(target(e), update, opt);
  }
  stream.apply(func);
}
function extension_onOperator(df, source, target, update, params, options) {
  if (update === undefined) {
    source.targets().add(target);
  } else {
    const opt = options || {},
      op = new extension_Operator(null, extension_updater(target, update), params, false);
    op.modified(opt.force);
    op.rank = source.rank; // immediately follow source
    source.targets().add(op); // add dependency

    if (target) {
      op.skip(true); // skip first invocation
      op.value = target.value; // initialize value
      op.targets().add(target); // chain dependencies
      df.connect(target, [op]); // rerank as needed, #1672
    }
  }
}
function extension_updater(target, update) {
  update = extension_vega_util_module_isFunction(update) ? update : extension_vega_util_module_constant(update);
  return target ? function (_, pulse) {
    const value = update(_, pulse);
    if (!target.skip()) {
      target.skip(value !== this.value).value = value;
    }
    return value;
  } : update;
}

/**
 * Assigns a rank to an operator. Ranks are assigned in increasing order
 * by incrementing an internal rank counter.
 * @param {Operator} op - The operator to assign a rank.
 */
function extension_vega_dataflow_module_rank(op) {
  op.rank = ++this._rank;
}

/**
 * Re-ranks an operator and all downstream target dependencies. This
 * is necessary when upstream dependencies of higher rank are added to
 * a target operator.
 * @param {Operator} op - The operator to re-rank.
 */
function extension_rerank(op) {
  const queue = [op];
  let cur, list, i;
  while (queue.length) {
    this.rank(cur = queue.pop());
    if (list = cur._targets) {
      for (i = list.length; --i >= 0;) {
        queue.push(cur = list[i]);
        if (cur === op) extension_vega_util_module_error('Cycle detected in dataflow graph.');
      }
    }
  }
}

/**
 * Sentinel value indicating pulse propagation should stop.
 */
const extension_StopPropagation = {};

// Pulse visit type flags
const extension_ADD = 1 << 0,
  extension_REM = 1 << 1,
  extension_MOD = 1 << 2,
  extension_ADD_REM = extension_ADD | extension_REM,
  extension_ADD_MOD = extension_ADD | extension_MOD,
  extension_vega_dataflow_module_ALL = extension_ADD | extension_REM | extension_MOD,
  extension_REFLOW = 1 << 3,
  extension_SOURCE = 1 << 4,
  extension_NO_SOURCE = 1 << 5,
  extension_NO_FIELDS = 1 << 6;

/**
 * A Pulse enables inter-operator communication during a run of the
 * dataflow graph. In addition to the current timestamp, a pulse may also
 * contain a change-set of added, removed or modified data tuples, as well as
 * a pointer to a full backing data source. Tuple change sets may not
 * be fully materialized; for example, to prevent needless array creation
 * a change set may include larger arrays and corresponding filter functions.
 * The pulse provides a {@link visit} method to enable proper and efficient
 * iteration over requested data tuples.
 *
 * In addition, each pulse can track modification flags for data tuple fields.
 * Responsible transform operators should call the {@link modifies} method to
 * indicate changes to data fields. The {@link modified} method enables
 * querying of this modification state.
 *
 * @constructor
 * @param {Dataflow} dataflow - The backing dataflow instance.
 * @param {number} stamp - The current propagation timestamp.
 * @param {string} [encode] - An optional encoding set name, which is then
 *   accessible as Pulse.encode. Operators can respond to (or ignore) this
 *   setting as appropriate. This parameter can be used in conjunction with
 *   the Encode transform in the vega-encode module.
 */
function extension_Pulse(dataflow, stamp, encode) {
  this.dataflow = dataflow;
  this.stamp = stamp == null ? -1 : stamp;
  this.add = [];
  this.rem = [];
  this.mod = [];
  this.fields = null;
  this.encode = encode || null;
}
function extension_materialize(data, filter) {
  const out = [];
  extension_visitArray(data, filter, _ => out.push(_));
  return out;
}
function extension_vega_dataflow_module_filter(pulse, flags) {
  const map = {};
  pulse.visit(flags, t => {
    map[extension_tupleid(t)] = 1;
  });
  return t => map[extension_tupleid(t)] ? null : t;
}
function extension_addFilter(a, b) {
  return a ? (t, i) => a(t, i) && b(t, i) : b;
}
extension_Pulse.prototype = {
  /**
   * Sentinel value indicating pulse propagation should stop.
   */
  StopPropagation: extension_StopPropagation,
  /**
   * Boolean flag indicating ADD (added) tuples.
   */
  ADD: extension_ADD,
  /**
   * Boolean flag indicating REM (removed) tuples.
   */
  REM: extension_REM,
  /**
   * Boolean flag indicating MOD (modified) tuples.
   */
  MOD: extension_MOD,
  /**
   * Boolean flag indicating ADD (added) and REM (removed) tuples.
   */
  ADD_REM: extension_ADD_REM,
  /**
   * Boolean flag indicating ADD (added) and MOD (modified) tuples.
   */
  ADD_MOD: extension_ADD_MOD,
  /**
   * Boolean flag indicating ADD, REM and MOD tuples.
   */
  ALL: extension_vega_dataflow_module_ALL,
  /**
   * Boolean flag indicating all tuples in a data source
   * except for the ADD, REM and MOD tuples.
   */
  REFLOW: extension_REFLOW,
  /**
   * Boolean flag indicating a 'pass-through' to a
   * backing data source, ignoring ADD, REM and MOD tuples.
   */
  SOURCE: extension_SOURCE,
  /**
   * Boolean flag indicating that source data should be
   * suppressed when creating a forked pulse.
   */
  NO_SOURCE: extension_NO_SOURCE,
  /**
   * Boolean flag indicating that field modifications should be
   * suppressed when creating a forked pulse.
   */
  NO_FIELDS: extension_NO_FIELDS,
  /**
   * Creates a new pulse based on the values of this pulse.
   * The dataflow, time stamp and field modification values are copied over.
   * By default, new empty ADD, REM and MOD arrays are created.
   * @param {number} flags - Integer of boolean flags indicating which (if any)
   *   tuple arrays should be copied to the new pulse. The supported flag values
   *   are ADD, REM and MOD. Array references are copied directly: new array
   *   instances are not created.
   * @return {Pulse} - The forked pulse instance.
   * @see init
   */
  fork(flags) {
    return new extension_Pulse(this.dataflow).init(this, flags);
  },
  /**
   * Creates a copy of this pulse with new materialized array
   * instances for the ADD, REM, MOD, and SOURCE arrays.
   * The dataflow, time stamp and field modification values are copied over.
   * @return {Pulse} - The cloned pulse instance.
   * @see init
   */
  clone() {
    const p = this.fork(extension_vega_dataflow_module_ALL);
    p.add = p.add.slice();
    p.rem = p.rem.slice();
    p.mod = p.mod.slice();
    if (p.source) p.source = p.source.slice();
    return p.materialize(extension_vega_dataflow_module_ALL | extension_SOURCE);
  },
  /**
   * Returns a pulse that adds all tuples from a backing source. This is
   * useful for cases where operators are added to a dataflow after an
   * upstream data pipeline has already been processed, ensuring that
   * new operators can observe all tuples within a stream.
   * @return {Pulse} - A pulse instance with all source tuples included
   *   in the add array. If the current pulse already has all source
   *   tuples in its add array, it is returned directly. If the current
   *   pulse does not have a backing source, it is returned directly.
   */
  addAll() {
    let p = this;
    const reuse = !p.source || p.add === p.rem // special case for indexed set (e.g., crossfilter)
    || !p.rem.length && p.source.length === p.add.length;
    if (reuse) {
      return p;
    } else {
      p = new extension_Pulse(this.dataflow).init(this);
      p.add = p.source;
      p.rem = []; // new operators can ignore rem #2769
      return p;
    }
  },
  /**
   * Initialize this pulse based on the values of another pulse. This method
   * is used internally by {@link fork} to initialize a new forked tuple.
   * The dataflow, time stamp and field modification values are copied over.
   * By default, new empty ADD, REM and MOD arrays are created.
   * @param {Pulse} src - The source pulse to copy from.
   * @param {number} flags - Integer of boolean flags indicating which (if any)
   *   tuple arrays should be copied to the new pulse. The supported flag values
   *   are ADD, REM and MOD. Array references are copied directly: new array
   *   instances are not created. By default, source data arrays are copied
   *   to the new pulse. Use the NO_SOURCE flag to enforce a null source.
   * @return {Pulse} - Returns this Pulse instance.
   */
  init(src, flags) {
    const p = this;
    p.stamp = src.stamp;
    p.encode = src.encode;
    if (src.fields && !(flags & extension_NO_FIELDS)) {
      p.fields = src.fields;
    }
    if (flags & extension_ADD) {
      p.addF = src.addF;
      p.add = src.add;
    } else {
      p.addF = null;
      p.add = [];
    }
    if (flags & extension_REM) {
      p.remF = src.remF;
      p.rem = src.rem;
    } else {
      p.remF = null;
      p.rem = [];
    }
    if (flags & extension_MOD) {
      p.modF = src.modF;
      p.mod = src.mod;
    } else {
      p.modF = null;
      p.mod = [];
    }
    if (flags & extension_NO_SOURCE) {
      p.srcF = null;
      p.source = null;
    } else {
      p.srcF = src.srcF;
      p.source = src.source;
      if (src.cleans) p.cleans = src.cleans;
    }
    return p;
  },
  /**
   * Schedules a function to run after pulse propagation completes.
   * @param {function} func - The function to run.
   */
  runAfter(func) {
    this.dataflow.runAfter(func);
  },
  /**
   * Indicates if tuples have been added, removed or modified.
   * @param {number} [flags] - The tuple types (ADD, REM or MOD) to query.
   *   Defaults to ALL, returning true if any tuple type has changed.
   * @return {boolean} - Returns true if one or more queried tuple types have
   *   changed, false otherwise.
   */
  changed(flags) {
    const f = flags || extension_vega_dataflow_module_ALL;
    return f & extension_ADD && this.add.length || f & extension_REM && this.rem.length || f & extension_MOD && this.mod.length;
  },
  /**
   * Forces a "reflow" of tuple values, such that all tuples in the backing
   * source are added to the MOD set, unless already present in the ADD set.
   * @param {boolean} [fork=false] - If true, returns a forked copy of this
   *   pulse, and invokes reflow on that derived pulse.
   * @return {Pulse} - The reflowed pulse instance.
   */
  reflow(fork) {
    if (fork) return this.fork(extension_vega_dataflow_module_ALL).reflow();
    const len = this.add.length,
      src = this.source && this.source.length;
    if (src && src !== len) {
      this.mod = this.source;
      if (len) this.filter(extension_MOD, extension_vega_dataflow_module_filter(this, extension_ADD));
    }
    return this;
  },
  /**
   * Get/set metadata to pulse requesting garbage collection
   * to reclaim currently unused resources.
   */
  clean(value) {
    if (arguments.length) {
      this.cleans = !!value;
      return this;
    } else {
      return this.cleans;
    }
  },
  /**
   * Marks one or more data field names as modified to assist dependency
   * tracking and incremental processing by transform operators.
   * @param {string|Array<string>} _ - The field(s) to mark as modified.
   * @return {Pulse} - This pulse instance.
   */
  modifies(_) {
    const hash = this.fields || (this.fields = {});
    if (extension_vega_util_module_isArray(_)) {
      _.forEach(f => hash[f] = true);
    } else {
      hash[_] = true;
    }
    return this;
  },
  /**
   * Checks if one or more data fields have been modified during this pulse
   * propagation timestamp.
   * @param {string|Array<string>} _ - The field(s) to check for modified.
   * @param {boolean} nomod - If true, will check the modified flag even if
   *   no mod tuples exist. If false (default), mod tuples must be present.
   * @return {boolean} - Returns true if any of the provided fields has been
   *   marked as modified, false otherwise.
   */
  modified(_, nomod) {
    const fields = this.fields;
    return !((nomod || this.mod.length) && fields) ? false : !arguments.length ? !!fields : extension_vega_util_module_isArray(_) ? _.some(f => fields[f]) : fields[_];
  },
  /**
   * Adds a filter function to one more tuple sets. Filters are applied to
   * backing tuple arrays, to determine the actual set of tuples considered
   * added, removed or modified. They can be used to delay materialization of
   * a tuple set in order to avoid expensive array copies. In addition, the
   * filter functions can serve as value transformers: unlike standard predicate
   * function (which return boolean values), Pulse filters should return the
   * actual tuple value to process. If a tuple set is already filtered, the
   * new filter function will be appended into a conjuntive ('and') query.
   * @param {number} flags - Flags indicating the tuple set(s) to filter.
   * @param {function(*):object} filter - Filter function that will be applied
   *   to the tuple set array, and should return a data tuple if the value
   *   should be included in the tuple set, and falsy (or null) otherwise.
   * @return {Pulse} - Returns this pulse instance.
   */
  filter(flags, filter) {
    const p = this;
    if (flags & extension_ADD) p.addF = extension_addFilter(p.addF, filter);
    if (flags & extension_REM) p.remF = extension_addFilter(p.remF, filter);
    if (flags & extension_MOD) p.modF = extension_addFilter(p.modF, filter);
    if (flags & extension_SOURCE) p.srcF = extension_addFilter(p.srcF, filter);
    return p;
  },
  /**
   * Materialize one or more tuple sets in this pulse. If the tuple set(s) have
   * a registered filter function, it will be applied and the tuple set(s) will
   * be replaced with materialized tuple arrays.
   * @param {number} flags - Flags indicating the tuple set(s) to materialize.
   * @return {Pulse} - Returns this pulse instance.
   */
  materialize(flags) {
    flags = flags || extension_vega_dataflow_module_ALL;
    const p = this;
    if (flags & extension_ADD && p.addF) {
      p.add = extension_materialize(p.add, p.addF);
      p.addF = null;
    }
    if (flags & extension_REM && p.remF) {
      p.rem = extension_materialize(p.rem, p.remF);
      p.remF = null;
    }
    if (flags & extension_MOD && p.modF) {
      p.mod = extension_materialize(p.mod, p.modF);
      p.modF = null;
    }
    if (flags & extension_SOURCE && p.srcF) {
      p.source = p.source.filter(p.srcF);
      p.srcF = null;
    }
    return p;
  },
  /**
   * Visit one or more tuple sets in this pulse.
   * @param {number} flags - Flags indicating the tuple set(s) to visit.
   *   Legal values are ADD, REM, MOD and SOURCE (if a backing data source
   *   has been set).
   * @param {function(object):*} - Visitor function invoked per-tuple.
   * @return {Pulse} - Returns this pulse instance.
   */
  visit(flags, visitor) {
    const p = this,
      v = visitor;
    if (flags & extension_SOURCE) {
      extension_visitArray(p.source, p.srcF, v);
      return p;
    }
    if (flags & extension_ADD) extension_visitArray(p.add, p.addF, v);
    if (flags & extension_REM) extension_visitArray(p.rem, p.remF, v);
    if (flags & extension_MOD) extension_visitArray(p.mod, p.modF, v);
    const src = p.source;
    if (flags & extension_REFLOW && src) {
      const sum = p.add.length + p.mod.length;
      if (sum === src.length) ; else if (sum) {
        extension_visitArray(src, extension_vega_dataflow_module_filter(p, extension_ADD_MOD), v);
      } else {
        // if no add/rem/mod tuples, visit source
        extension_visitArray(src, p.srcF, v);
      }
    }
    return p;
  }
};

/**
 * Represents a set of multiple pulses. Used as input for operators
 * that accept multiple pulses at a time. Contained pulses are
 * accessible via the public "pulses" array property. This pulse doe
 * not carry added, removed or modified tuples directly. However,
 * the visit method can be used to traverse all such tuples contained
 * in sub-pulses with a timestamp matching this parent multi-pulse.
 * @constructor
 * @param {Dataflow} dataflow - The backing dataflow instance.
 * @param {number} stamp - The timestamp.
 * @param {Array<Pulse>} pulses - The sub-pulses for this multi-pulse.
 */
function extension_MultiPulse(dataflow, stamp, pulses, encode) {
  const p = this;
  let c = 0;
  this.dataflow = dataflow;
  this.stamp = stamp;
  this.fields = null;
  this.encode = encode || null;
  this.pulses = pulses;
  for (const pulse of pulses) {
    if (pulse.stamp !== stamp) continue;
    if (pulse.fields) {
      const hash = p.fields || (p.fields = {});
      for (const f in pulse.fields) {
        hash[f] = 1;
      }
    }
    if (pulse.changed(p.ADD)) c |= p.ADD;
    if (pulse.changed(p.REM)) c |= p.REM;
    if (pulse.changed(p.MOD)) c |= p.MOD;
  }
  this.changes = c;
}
extension_inherits(extension_MultiPulse, extension_Pulse, {
  /**
   * Creates a new pulse based on the values of this pulse.
   * The dataflow, time stamp and field modification values are copied over.
   * @return {Pulse}
   */
  fork(flags) {
    const p = new extension_Pulse(this.dataflow).init(this, flags & this.NO_FIELDS);
    if (flags !== undefined) {
      if (flags & p.ADD) this.visit(p.ADD, t => p.add.push(t));
      if (flags & p.REM) this.visit(p.REM, t => p.rem.push(t));
      if (flags & p.MOD) this.visit(p.MOD, t => p.mod.push(t));
    }
    return p;
  },
  changed(flags) {
    return this.changes & flags;
  },
  modified(_) {
    const p = this,
      fields = p.fields;
    return !(fields && p.changes & p.MOD) ? 0 : extension_vega_util_module_isArray(_) ? _.some(f => fields[f]) : fields[_];
  },
  filter() {
    extension_vega_util_module_error('MultiPulse does not support filtering.');
  },
  materialize() {
    extension_vega_util_module_error('MultiPulse does not support materialization.');
  },
  visit(flags, visitor) {
    const p = this,
      pulses = p.pulses,
      n = pulses.length;
    let i = 0;
    if (flags & p.SOURCE) {
      for (; i < n; ++i) {
        pulses[i].visit(flags, visitor);
      }
    } else {
      for (; i < n; ++i) {
        if (pulses[i].stamp === p.stamp) {
          pulses[i].visit(flags, visitor);
        }
      }
    }
    return p;
  }
});

/* eslint-disable require-atomic-updates */

/**
 * Evaluates the dataflow and returns a Promise that resolves when pulse
 * propagation completes. This method will increment the current timestamp
 * and process all updated, pulsed and touched operators. When invoked for
 * the first time, all registered operators will be processed. This method
 * should not be invoked by third-party clients, use {@link runAsync} or
 * {@link run} instead.
 * @param {string} [encode] - The name of an encoding set to invoke during
 *   propagation. This value is added to generated Pulse instances;
 *   operators can then respond to (or ignore) this setting as appropriate.
 *   This parameter can be used in conjunction with the Encode transform in
 *   the vega-encode package.
 * @param {function} [prerun] - An optional callback function to invoke
 *   immediately before dataflow evaluation commences.
 * @param {function} [postrun] - An optional callback function to invoke
 *   after dataflow evaluation completes. The callback will be invoked
 *   after those registered via {@link runAfter}.
 * @return {Promise} - A promise that resolves to this dataflow after
 *   evaluation completes.
 */
async function extension_evaluate(encode, prerun, postrun) {
  const df = this,
    async = [];

  // if the pulse value is set, this is a re-entrant call
  if (df._pulse) return extension_reentrant(df);

  // wait for pending datasets to load
  if (df._pending) await df._pending;

  // invoke prerun function, if provided
  if (prerun) await extension_asyncCallback(df, prerun);

  // exit early if there are no updates
  if (!df._touched.length) {
    df.debug('Dataflow invoked, but nothing to do.');
    return df;
  }

  // increment timestamp clock
  const stamp = ++df._clock;

  // set the current pulse
  df._pulse = new extension_Pulse(df, stamp, encode);

  // initialize priority queue, reset touched operators
  df._touched.forEach(op => df._enqueue(op, true));
  df._touched = extension_UniqueList(extension_id);
  let count = 0,
    op,
    next,
    error;
  try {
    while (df._heap.size() > 0) {
      // dequeue operator with highest priority
      op = df._heap.pop();

      // re-queue if rank changed
      if (op.rank !== op.qrank) {
        df._enqueue(op, true);
        continue;
      }

      // otherwise, evaluate the operator
      next = op.run(df._getPulse(op, encode));
      if (next.then) {
        // await if operator returns a promise directly
        next = await next;
      } else if (next.async) {
        // queue parallel asynchronous execution
        async.push(next.async);
        next = extension_StopPropagation;
      }

      // propagate evaluation, enqueue dependent operators
      if (next !== extension_StopPropagation) {
        if (op._targets) op._targets.forEach(op => df._enqueue(op));
      }

      // increment visit counter
      ++count;
    }
  } catch (err) {
    df._heap.clear();
    error = err;
  }

  // reset pulse map
  df._input = {};
  df._pulse = null;
  df.debug(`Pulse ${stamp}: ${count} operators`);
  if (error) {
    df._postrun = [];
    df.error(error);
  }

  // invoke callbacks queued via runAfter
  if (df._postrun.length) {
    const pr = df._postrun.sort((a, b) => b.priority - a.priority);
    df._postrun = [];
    for (let i = 0; i < pr.length; ++i) {
      await extension_asyncCallback(df, pr[i].callback);
    }
  }

  // invoke postrun function, if provided
  if (postrun) await extension_asyncCallback(df, postrun);

  // handle non-blocking asynchronous callbacks
  if (async.length) {
    Promise.all(async).then(cb => df.runAsync(null, () => {
      cb.forEach(f => {
        try {
          f(df);
        } catch (err) {
          df.error(err);
        }
      });
    }));
  }
  return df;
}

/**
 * Queues dataflow evaluation to run once any other queued evaluations have
 * completed and returns a Promise that resolves when the queued pulse
 * propagation completes. If provided, a callback function will be invoked
 * immediately before evaluation commences. This method will ensure a
 * separate evaluation is invoked for each time it is called.
 * @param {string} [encode] - The name of an encoding set to invoke during
 *   propagation. This value is added to generated Pulse instances;
 *   operators can then respond to (or ignore) this setting as appropriate.
 *   This parameter can be used in conjunction with the Encode transform in
 *   the vega-encode package.
 * @param {function} [prerun] - An optional callback function to invoke
 *   immediately before dataflow evaluation commences.
 * @param {function} [postrun] - An optional callback function to invoke
 *   after dataflow evaluation completes. The callback will be invoked
 *   after those registered via {@link runAfter}.
 * @return {Promise} - A promise that resolves to this dataflow after
 *   evaluation completes.
 */
async function extension_runAsync(encode, prerun, postrun) {
  // await previously queued functions
  while (this._running) await this._running;

  // run dataflow, manage running promise
  const clear = () => this._running = null;
  (this._running = this.evaluate(encode, prerun, postrun)).then(clear, clear);
  return this._running;
}

/**
 * Requests dataflow evaluation and the immediately returns this dataflow
 * instance. If there are pending data loading or other asynchronous
 * operations, the dataflow will evaluate asynchronously after this method
 * has been invoked. To track when dataflow evaluation completes, use the
 * {@link runAsync} method instead. This method will raise an error if
 * invoked while the dataflow is already in the midst of evaluation.
 * @param {string} [encode] - The name of an encoding set to invoke during
 *   propagation. This value is added to generated Pulse instances;
 *   operators can then respond to (or ignore) this setting as appropriate.
 *   This parameter can be used in conjunction with the Encode transform in
 *   the vega-encode module.
 * @param {function} [prerun] - An optional callback function to invoke
 *   immediately before dataflow evaluation commences.
 * @param {function} [postrun] - An optional callback function to invoke
 *   after dataflow evaluation completes. The callback will be invoked
 *   after those registered via {@link runAfter}.
 * @return {Dataflow} - This dataflow instance.
 */
function extension_vega_dataflow_module_run(encode, prerun, postrun) {
  return this._pulse ? extension_reentrant(this) : (this.evaluate(encode, prerun, postrun), this);
}

/**
 * Schedules a callback function to be invoked after the current pulse
 * propagation completes. If no propagation is currently occurring,
 * the function is invoked immediately. Callbacks scheduled via runAfter
 * are invoked immediately upon completion of the current cycle, before
 * any request queued via runAsync. This method is primarily intended for
 * internal use. Third-party callers using runAfter to schedule a callback
 * that invokes {@link run} or {@link runAsync} should not use this method,
 * but instead use {@link runAsync} with prerun or postrun arguments.
 * @param {function(Dataflow)} callback - The callback function to run.
 *   The callback will be invoked with this Dataflow instance as its
 *   sole argument.
 * @param {boolean} enqueue - A boolean flag indicating that the
 *   callback should be queued up to run after the next propagation
 *   cycle, suppressing immediate invocation when propagation is not
 *   currently occurring.
 * @param {number} [priority] - A priority value used to sort registered
 *   callbacks to determine execution order. This argument is intended
 *   for internal Vega use only.
 */
function extension_runAfter(callback, enqueue, priority) {
  if (this._pulse || enqueue) {
    // pulse propagation is currently running, queue to run after
    this._postrun.push({
      priority: priority || 0,
      callback: callback
    });
  } else {
    // pulse propagation already complete, invoke immediately
    try {
      callback(this);
    } catch (err) {
      this.error(err);
    }
  }
}

/**
 * Raise an error for re-entrant dataflow evaluation.
 */
function extension_reentrant(df) {
  df.error('Dataflow already running. Use runAsync() to chain invocations.');
  return df;
}

/**
 * Enqueue an operator into the priority queue for evaluation. The operator
 * will be enqueued if it has no registered pulse for the current cycle, or if
 * the force argument is true. Upon enqueue, this method also sets the
 * operator's qrank to the current rank value.
 * @param {Operator} op - The operator to enqueue.
 * @param {boolean} [force] - A flag indicating if the operator should be
 *   forceably added to the queue, even if it has already been previously
 *   enqueued during the current pulse propagation. This is useful when the
 *   dataflow graph is dynamically modified and the operator rank changes.
 */
function extension_enqueue(op, force) {
  const q = op.stamp < this._clock;
  if (q) op.stamp = this._clock;
  if (q || force) {
    op.qrank = op.rank;
    this._heap.push(op);
  }
}

/**
 * Provide a correct pulse for evaluating an operator. If the operator has an
 * explicit source operator, we will try to pull the pulse(s) from it.
 * If there is an array of source operators, we build a multi-pulse.
 * Otherwise, we return a current pulse with correct source data.
 * If the pulse is the pulse map has an explicit target set, we use that.
 * Else if the pulse on the upstream source operator is current, we use that.
 * Else we use the pulse from the pulse map, but copy the source tuple array.
 * @param {Operator} op - The operator for which to get an input pulse.
 * @param {string} [encode] - An (optional) encoding set name with which to
 *   annotate the returned pulse. See {@link run} for more information.
 */
function extension_getPulse(op, encode) {
  const s = op.source,
    stamp = this._clock;
  return s && extension_vega_util_module_isArray(s) ? new extension_MultiPulse(this, stamp, s.map(_ => _.pulse), encode) : this._input[op.id] || extension_singlePulse(this._pulse, s && s.pulse);
}
function extension_singlePulse(p, s) {
  if (s && s.stamp === p.stamp) {
    return s;
  }
  p = p.fork();
  if (s && s !== extension_StopPropagation) {
    p.source = s.source;
  }
  return p;
}

const extension_NO_OPT = {
  skip: false,
  force: false
};

/**
 * Touches an operator, scheduling it to be evaluated. If invoked outside of
 * a pulse propagation, the operator will be evaluated the next time this
 * dataflow is run. If invoked in the midst of pulse propagation, the operator
 * will be queued for evaluation if and only if the operator has not yet been
 * evaluated on the current propagation timestamp.
 * @param {Operator} op - The operator to touch.
 * @param {object} [options] - Additional options hash.
 * @param {boolean} [options.skip] - If true, the operator will
 *   be skipped: it will not be evaluated, but its dependents will be.
 * @return {Dataflow}
 */
function extension_touch(op, options) {
  const opt = options || extension_NO_OPT;
  if (this._pulse) {
    // if in midst of propagation, add to priority queue
    this._enqueue(op);
  } else {
    // otherwise, queue for next propagation
    this._touched.add(op);
  }
  if (opt.skip) op.skip(true);
  return this;
}

/**
 * Updates the value of the given operator.
 * @param {Operator} op - The operator to update.
 * @param {*} value - The value to set.
 * @param {object} [options] - Additional options hash.
 * @param {boolean} [options.force] - If true, the operator will
 *   be re-evaluated even if its value has not changed.
 * @param {boolean} [options.skip] - If true, the operator will
 *   be skipped: it will not be evaluated, but its dependents will be.
 * @return {Dataflow}
 */
function extension_vega_dataflow_module_update(op, value, options) {
  const opt = options || extension_NO_OPT;
  if (op.set(value) || opt.force) {
    this.touch(op, opt);
  }
  return this;
}

/**
 * Pulses an operator with a changeset of tuples. If invoked outside of
 * a pulse propagation, the pulse will be applied the next time this
 * dataflow is run. If invoked in the midst of pulse propagation, the pulse
 * will be added to the set of active pulses and will be applied if and
 * only if the target operator has not yet been evaluated on the current
 * propagation timestamp.
 * @param {Operator} op - The operator to pulse.
 * @param {ChangeSet} value - The tuple changeset to apply.
 * @param {object} [options] - Additional options hash.
 * @param {boolean} [options.skip] - If true, the operator will
 *   be skipped: it will not be evaluated, but its dependents will be.
 * @return {Dataflow}
 */
function extension_pulse(op, changeset, options) {
  this.touch(op, options || extension_NO_OPT);
  const p = new extension_Pulse(this, this._clock + (this._pulse ? 0 : 1)),
    t = op.pulse && op.pulse.source || [];
  p.target = op;
  this._input[op.id] = changeset.pulse(p, t);
  return this;
}

function extension_Heap(cmp) {
  let nodes = [];
  return {
    clear: () => nodes = [],
    size: () => nodes.length,
    peek: () => nodes[0],
    push: x => {
      nodes.push(x);
      return extension_siftdown(nodes, 0, nodes.length - 1, cmp);
    },
    pop: () => {
      const last = nodes.pop();
      let item;
      if (nodes.length) {
        item = nodes[0];
        nodes[0] = last;
        extension_siftup(nodes, 0, cmp);
      } else {
        item = last;
      }
      return item;
    }
  };
}
function extension_siftdown(array, start, idx, cmp) {
  let parent, pidx;
  const item = array[idx];
  while (idx > start) {
    pidx = idx - 1 >> 1;
    parent = array[pidx];
    if (cmp(item, parent) < 0) {
      array[idx] = parent;
      idx = pidx;
      continue;
    }
    break;
  }
  return array[idx] = item;
}
function extension_siftup(array, idx, cmp) {
  const start = idx,
    end = array.length,
    item = array[idx];
  let cidx = (idx << 1) + 1,
    ridx;
  while (cidx < end) {
    ridx = cidx + 1;
    if (ridx < end && cmp(array[cidx], array[ridx]) >= 0) {
      cidx = ridx;
    }
    array[idx] = array[cidx];
    idx = cidx;
    cidx = (idx << 1) + 1;
  }
  array[idx] = item;
  return extension_siftdown(array, start, idx, cmp);
}

/**
 * A dataflow graph for reactive processing of data streams.
 * @constructor
 */
function extension_Dataflow() {
  this.logger(extension_logger());
  this.logLevel(extension_Error$1);
  this._clock = 0;
  this._rank = 0;
  this._locale = extension_vega_format_module_defaultLocale();
  try {
    this._loader = extension_loader();
  } catch (e) {
    // do nothing if loader module is unavailable
  }
  this._touched = extension_UniqueList(extension_id);
  this._input = {};
  this._pulse = null;
  this._heap = extension_Heap((a, b) => a.qrank - b.qrank);
  this._postrun = [];
}
function extension_logMethod(method) {
  return function () {
    return this._log[method].apply(this, arguments);
  };
}
extension_Dataflow.prototype = {
  /**
   * The current timestamp of this dataflow. This value reflects the
   * timestamp of the previous dataflow run. The dataflow is initialized
   * with a stamp value of 0. The initial run of the dataflow will have
   * a timestap of 1, and so on. This value will match the
   * {@link Pulse.stamp} property.
   * @return {number} - The current timestamp value.
   */
  stamp() {
    return this._clock;
  },
  /**
   * Gets or sets the loader instance to use for data file loading. A
   * loader object must provide a "load" method for loading files and a
   * "sanitize" method for checking URL/filename validity. Both methods
   * should accept a URI and options hash as arguments, and return a Promise
   * that resolves to the loaded file contents (load) or a hash containing
   * sanitized URI data with the sanitized url assigned to the "href" property
   * (sanitize).
   * @param {object} _ - The loader instance to use.
   * @return {object|Dataflow} - If no arguments are provided, returns
   *   the current loader instance. Otherwise returns this Dataflow instance.
   */
  loader(_) {
    if (arguments.length) {
      this._loader = _;
      return this;
    } else {
      return this._loader;
    }
  },
  /**
   * Gets or sets the locale instance to use for formatting and parsing
   * string values. The locale object should be provided by the
   * vega-format library, and include methods such as format, timeFormat,
   * utcFormat, timeParse, and utcParse.
   * @param {object} _ - The locale instance to use.
   * @return {object|Dataflow} - If no arguments are provided, returns
   *   the current locale instance. Otherwise returns this Dataflow instance.
   */
  locale(_) {
    if (arguments.length) {
      this._locale = _;
      return this;
    } else {
      return this._locale;
    }
  },
  /**
   * Get or set the logger instance used to log messages. If no arguments are
   * provided, returns the current logger instance. Otherwise, sets the logger
   * and return this Dataflow instance. Provided loggers must support the full
   * API of logger objects generated by the vega-util logger method. Note that
   * by default the log level of the new logger will be used; use the logLevel
   * method to adjust the log level as needed.
   */
  logger(logger) {
    if (arguments.length) {
      this._log = logger;
      return this;
    } else {
      return this._log;
    }
  },
  /**
   * Logs an error message. By default, logged messages are written to console
   * output. The message will only be logged if the current log level is high
   * enough to permit error messages.
   */
  error: extension_logMethod('error'),
  /**
   * Logs a warning message. By default, logged messages are written to console
   * output. The message will only be logged if the current log level is high
   * enough to permit warning messages.
   */
  warn: extension_logMethod('warn'),
  /**
   * Logs a information message. By default, logged messages are written to
   * console output. The message will only be logged if the current log level is
   * high enough to permit information messages.
   */
  info: extension_logMethod('info'),
  /**
   * Logs a debug message. By default, logged messages are written to console
   * output. The message will only be logged if the current log level is high
   * enough to permit debug messages.
   */
  debug: extension_logMethod('debug'),
  /**
   * Get or set the current log level. If an argument is provided, it
   * will be used as the new log level.
   * @param {number} [level] - Should be one of None, Warn, Info
   * @return {number} - The current log level.
   */
  logLevel: extension_logMethod('level'),
  /**
   * Empty entry threshold for garbage cleaning. Map data structures will
   * perform cleaning once the number of empty entries exceeds this value.
   */
  cleanThreshold: 1e4,
  // OPERATOR REGISTRATION
  add: extension_add,
  connect: extension_connect,
  rank: extension_vega_dataflow_module_rank,
  rerank: extension_rerank,
  // OPERATOR UPDATES
  pulse: extension_pulse,
  touch: extension_touch,
  update: extension_vega_dataflow_module_update,
  changeset: extension_changeset,
  // DATA LOADING
  ingest: extension_ingest,
  parse: extension_vega_dataflow_module_parse,
  preload: extension_preload,
  request: extension_request,
  // EVENT HANDLING
  events: extension_events,
  on: extension_on,
  // PULSE PROPAGATION
  evaluate: extension_evaluate,
  run: extension_vega_dataflow_module_run,
  runAsync: extension_runAsync,
  runAfter: extension_runAfter,
  _enqueue: extension_enqueue,
  _getPulse: extension_getPulse
};

/**
 * Abstract class for operators that process data tuples.
 * Subclasses must provide a {@link transform} method for operator processing.
 * @constructor
 * @param {*} [init] - The initial value for this operator.
 * @param {object} [params] - The parameters for this operator.
 * @param {Operator} [source] - The operator from which to receive pulses.
 */
function extension_Transform(init, params) {
  extension_Operator.call(this, init, null, params);
}
extension_inherits(extension_Transform, extension_Operator, {
  /**
   * Overrides {@link Operator.evaluate} for transform operators.
   * Internally, this method calls {@link evaluate} to perform processing.
   * If {@link evaluate} returns a falsy value, the input pulse is returned.
   * This method should NOT be overridden, instead overrride {@link evaluate}.
   * @param {Pulse} pulse - the current dataflow pulse.
   * @return the output pulse for this operator (or StopPropagation)
   */
  run(pulse) {
    if (pulse.stamp < this.stamp) return pulse.StopPropagation;
    let rv;
    if (this.skip()) {
      this.skip(false);
    } else {
      rv = this.evaluate(pulse);
    }
    rv = rv || pulse;
    if (rv.then) {
      rv = rv.then(_ => this.pulse = _);
    } else if (rv !== pulse.StopPropagation) {
      this.pulse = rv;
    }
    return rv;
  },
  /**
   * Overrides {@link Operator.evaluate} for transform operators.
   * Marshalls parameter values and then invokes {@link transform}.
   * @param {Pulse} pulse - the current dataflow pulse.
   * @return {Pulse} The output pulse (or StopPropagation). A falsy return
       value (including undefined) will let the input pulse pass through.
  */
  evaluate(pulse) {
    const params = this.marshall(pulse.stamp),
      out = this.transform(params, pulse);
    params.clear();
    return out;
  },
  /**
   * Process incoming pulses.
   * Subclasses should override this method to implement transforms.
   * @param {Parameters} _ - The operator parameter values.
   * @param {Pulse} pulse - The current dataflow pulse.
   * @return {Pulse} The output pulse (or StopPropagation). A falsy return
   *   value (including undefined) will let the input pulse pass through.
   */
  transform() {}
});

const extension_transforms = {};
function extension_definition(type) {
  const t = extension_vega_dataflow_module_transform(type);
  return t && t.Definition || null;
}
function extension_vega_dataflow_module_transform(type) {
  type = type && type.toLowerCase();
  return extension_vega_util_module_has(extension_transforms, type) ? extension_transforms[type] : null;
}



;// ../../node_modules/d3-array/src/max.js
function extension_max_max(values, valueof) {
  let max;
  if (valueof === undefined) {
    for (const value of values) {
      if (value != null
          && (max < value || (max === undefined && value >= value))) {
        max = value;
      }
    }
  } else {
    let index = -1;
    for (let value of values) {
      if ((value = valueof(value, ++index, values)) != null
          && (max < value || (max === undefined && value >= value))) {
        max = value;
      }
    }
  }
  return max;
}

;// ../../node_modules/d3-array/src/min.js
function extension_min_min(values, valueof) {
  let min;
  if (valueof === undefined) {
    for (const value of values) {
      if (value != null
          && (min > value || (min === undefined && value >= value))) {
        min = value;
      }
    }
  } else {
    let index = -1;
    for (let value of values) {
      if ((value = valueof(value, ++index, values)) != null
          && (min > value || (min === undefined && value >= value))) {
        min = value;
      }
    }
  }
  return min;
}

;// ../../node_modules/d3-array/src/sort.js



function extension_sort(values, ...F) {
  if (typeof values[Symbol.iterator] !== "function") throw new TypeError("values is not iterable");
  values = Array.from(values);
  let [f] = F;
  if ((f && f.length !== 2) || F.length > 1) {
    const index = Uint32Array.from(values, (d, i) => i);
    if (F.length > 1) {
      F = F.map(f => values.map(f));
      index.sort((i, j) => {
        for (const f of F) {
          const c = extension_sort_ascendingDefined(f[i], f[j]);
          if (c) return c;
        }
      });
    } else {
      f = values.map(f);
      index.sort((i, j) => extension_sort_ascendingDefined(f[i], f[j]));
    }
    return permute(values, index);
  }
  return values.sort(extension_compareDefined(f));
}

function extension_compareDefined(compare = extension_ascending_ascending) {
  if (compare === extension_ascending_ascending) return extension_sort_ascendingDefined;
  if (typeof compare !== "function") throw new TypeError("compare is not a function");
  return (a, b) => {
    const x = compare(a, b);
    if (x || x === 0) return x;
    return (compare(b, b) === 0) - (compare(a, a) === 0);
  };
}

function extension_sort_ascendingDefined(a, b) {
  return (a == null || !(a >= a)) - (b == null || !(b >= b)) || (a < b ? -1 : a > b ? 1 : 0);
}

;// ../../node_modules/d3-array/src/quickselect.js


// Based on https://github.com/mourner/quickselect
// ISC license, Copyright 2018 Vladimir Agafonkin.
function extension_quickselect_quickselect(array, k, left = 0, right = Infinity, compare) {
  k = Math.floor(k);
  left = Math.floor(Math.max(0, left));
  right = Math.floor(Math.min(array.length - 1, right));

  if (!(left <= k && k <= right)) return array;

  compare = compare === undefined ? extension_sort_ascendingDefined : extension_compareDefined(compare);

  while (right > left) {
    if (right - left > 600) {
      const n = right - left + 1;
      const m = k - left + 1;
      const z = Math.log(n);
      const s = 0.5 * Math.exp(2 * z / 3);
      const sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
      const newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
      const newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
      extension_quickselect_quickselect(array, k, newLeft, newRight, compare);
    }

    const t = array[k];
    let i = left;
    let j = right;

    extension_swap(array, left, k);
    if (compare(array[right], t) > 0) extension_swap(array, left, right);

    while (i < j) {
      extension_swap(array, i, j), ++i, --j;
      while (compare(array[i], t) < 0) ++i;
      while (compare(array[j], t) > 0) --j;
    }

    if (compare(array[left], t) === 0) extension_swap(array, left, j);
    else ++j, extension_swap(array, j, right);

    if (j <= k) left = j + 1;
    if (k <= j) right = j - 1;
  }

  return array;
}

function extension_swap(array, i, j) {
  const t = array[i];
  array[i] = array[j];
  array[j] = t;
}

;// ../../node_modules/d3-array/src/number.js
function extension_number_number(x) {
  return x === null ? NaN : +x;
}

function* extension_numbers(values, valueof) {
  if (valueof === undefined) {
    for (let value of values) {
      if (value != null && (value = +value) >= value) {
        yield value;
      }
    }
  } else {
    let index = -1;
    for (let value of values) {
      if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {
        yield value;
      }
    }
  }
}

;// ../../node_modules/d3-array/src/quantile.js









function extension_quantile_quantile(values, p, valueof) {
  values = Float64Array.from(extension_numbers(values, valueof));
  if (!(n = values.length) || isNaN(p = +p)) return;
  if (p <= 0 || n < 2) return extension_min_min(values);
  if (p >= 1) return extension_max_max(values);
  var n,
      i = (n - 1) * p,
      i0 = Math.floor(i),
      value0 = extension_max_max(extension_quickselect_quickselect(values, i0).subarray(0, i0 + 1)),
      value1 = extension_min_min(values.subarray(i0 + 1));
  return value0 + (value1 - value0) * (i - i0);
}

function extension_quantileSorted(values, p, valueof = extension_number_number) {
  if (!(n = values.length) || isNaN(p = +p)) return;
  if (p <= 0 || n < 2) return +valueof(values[0], 0, values);
  if (p >= 1) return +valueof(values[n - 1], n - 1, values);
  var n,
      i = (n - 1) * p,
      i0 = Math.floor(i),
      value0 = +valueof(values[i0], i0, values),
      value1 = +valueof(values[i0 + 1], i0 + 1, values);
  return value0 + (value1 - value0) * (i - i0);
}

function extension_quantile_quantileIndex(values, p, valueof = number) {
  if (isNaN(p = +p)) return;
  numbers = Float64Array.from(values, (_, i) => number(valueof(values[i], i, values)));
  if (p <= 0) return minIndex(numbers);
  if (p >= 1) return maxIndex(numbers);
  var numbers,
      index = Uint32Array.from(values, (_, i) => i),
      j = numbers.length - 1,
      i = Math.floor(j * p);
  quickselect(index, i, 0, j, (i, j) => ascendingDefined(numbers[i], numbers[j]));
  i = greatest(index.subarray(0, i + 1), (i) => numbers[i]);
  return i >= 0 ? i : -1;
}

;// ../../node_modules/d3-array/src/variance.js
function extension_variance(values, valueof) {
  let count = 0;
  let delta;
  let mean = 0;
  let sum = 0;
  if (valueof === undefined) {
    for (let value of values) {
      if (value != null && (value = +value) >= value) {
        delta = value - mean;
        mean += delta / ++count;
        sum += delta * (value - mean);
      }
    }
  } else {
    let index = -1;
    for (let value of values) {
      if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {
        delta = value - mean;
        mean += delta / ++count;
        sum += delta * (value - mean);
      }
    }
  }
  if (count > 1) return sum / (count - 1);
}

;// ../../node_modules/d3-array/src/deviation.js


function extension_deviation(values, valueof) {
  const v = extension_variance(values, valueof);
  return v ? Math.sqrt(v) : v;
}

;// ../../node_modules/d3-array/src/median.js


function extension_median(values, valueof) {
  return extension_quantile_quantile(values, 0.5, valueof);
}

function extension_medianIndex(values, valueof) {
  return quantileIndex(values, 0.5, valueof);
}

;// ../../node_modules/vega-statistics/build/vega-statistics.module.js


function* extension_vega_statistics_module_numbers (values, valueof) {
  if (valueof == null) {
    for (let value of values) {
      if (value != null && value !== '' && (value = +value) >= value) {
        yield value;
      }
    }
  } else {
    let index = -1;
    for (let value of values) {
      value = valueof(value, ++index, values);
      if (value != null && value !== '' && (value = +value) >= value) {
        yield value;
      }
    }
  }
}

function extension_quantiles (array, p, f) {
  const values = Float64Array.from(extension_vega_statistics_module_numbers(array, f));

  // don't depend on return value from typed array sort call
  // protects against undefined sort results in Safari (vega/vega-lite#4964)
  values.sort(extension_ascending_ascending);
  return p.map(_ => extension_quantileSorted(values, _));
}

function extension_quartiles (array, f) {
  return extension_quantiles(array, [0.25, 0.50, 0.75], f);
}

// Scott, D. W. (1992) Multivariate Density Estimation:
// Theory, Practice, and Visualization. Wiley.
function extension_estimateBandwidth (array, f) {
  const n = array.length,
    d = extension_deviation(array, f),
    q = extension_quartiles(array, f),
    h = (q[2] - q[0]) / 1.34,
    v = Math.min(d, h) || d || Math.abs(q[0]) || 1;
  return 1.06 * v * Math.pow(n, -0.2);
}

function extension_vega_statistics_module_bin (_) {
  // determine range
  const maxb = _.maxbins || 20,
    base = _.base || 10,
    logb = Math.log(base),
    div = _.divide || [5, 2];
  let min = _.extent[0],
    max = _.extent[1],
    step,
    level,
    minstep,
    v,
    i,
    n;
  const span = _.span || max - min || Math.abs(min) || 1;
  if (_.step) {
    // if step size is explicitly given, use that
    step = _.step;
  } else if (_.steps) {
    // if provided, limit choice to acceptable step sizes
    v = span / maxb;
    for (i = 0, n = _.steps.length; i < n && _.steps[i] < v; ++i);
    step = _.steps[Math.max(0, i - 1)];
  } else {
    // else use span to determine step size
    level = Math.ceil(Math.log(maxb) / logb);
    minstep = _.minstep || 0;
    step = Math.max(minstep, Math.pow(base, Math.round(Math.log(span) / logb) - level));

    // increase step size if too many bins
    while (Math.ceil(span / step) > maxb) {
      step *= base;
    }

    // decrease step size if allowed
    for (i = 0, n = div.length; i < n; ++i) {
      v = step / div[i];
      if (v >= minstep && span / v <= maxb) step = v;
    }
  }

  // update precision, min and max
  v = Math.log(step);
  const precision = v >= 0 ? 0 : ~~(-v / logb) + 1,
    eps = Math.pow(base, -precision - 1);
  if (_.nice || _.nice === undefined) {
    v = Math.floor(min / step + eps) * step;
    min = min < v ? v - step : v;
    max = Math.ceil(max / step) * step;
  }
  return {
    start: min,
    stop: max === min ? min + step : max,
    step: step
  };
}

var extension_vega_statistics_module_random = Math.random;
function extension_setRandom(r) {
  extension_vega_statistics_module_random = r;
}

function extension_bootstrapCI (array, samples, alpha, f) {
  if (!array.length) return [undefined, undefined];
  const values = Float64Array.from(extension_vega_statistics_module_numbers(array, f)),
    n = values.length,
    m = samples;
  let a, i, j, mu;
  for (j = 0, mu = Array(m); j < m; ++j) {
    for (a = 0, i = 0; i < n; ++i) {
      a += values[~~(extension_vega_statistics_module_random() * n)];
    }
    mu[j] = a / n;
  }
  mu.sort(extension_ascending_ascending);
  return [extension_quantile_quantile(mu, alpha / 2), extension_quantile_quantile(mu, 1 - alpha / 2)];
}

// Dot density binning for dot plot construction.
// Based on Leland Wilkinson, Dot Plots, The American Statistician, 1999.
// https://www.cs.uic.edu/~wilkinson/Publications/dotplots.pdf
function extension_dotbin (array, step, smooth, f) {
  f = f || (_ => _);
  const n = array.length,
    v = new Float64Array(n);
  let i = 0,
    j = 1,
    a = f(array[0]),
    b = a,
    w = a + step,
    x;
  for (; j < n; ++j) {
    x = f(array[j]);
    if (x >= w) {
      b = (a + b) / 2;
      for (; i < j; ++i) v[i] = b;
      w = x + step;
      a = x;
    }
    b = x;
  }
  b = (a + b) / 2;
  for (; i < j; ++i) v[i] = b;
  return smooth ? extension_smoothing(v, step + step / 4) : v;
}

// perform smoothing to reduce variance
// swap points between "adjacent" stacks
// Wilkinson defines adjacent as within step/4 units
function extension_smoothing(v, thresh) {
  const n = v.length;
  let a = 0,
    b = 1,
    c,
    d;

  // get left stack
  while (v[a] === v[b]) ++b;
  while (b < n) {
    // get right stack
    c = b + 1;
    while (v[b] === v[c]) ++c;

    // are stacks adjacent?
    // if so, compare sizes and swap as needed
    if (v[b] - v[b - 1] < thresh) {
      d = b + (a + c - b - b >> 1);
      while (d < b) v[d++] = v[b];
      while (d > b) v[d--] = v[a];
    }

    // update left stack indices
    a = b;
    b = c;
  }
  return v;
}

function extension_vega_statistics_module_lcg (seed) {
  // Random numbers using a Linear Congruential Generator with seed value
  // Uses glibc values from https://en.wikipedia.org/wiki/Linear_congruential_generator
  return function () {
    seed = (1103515245 * seed + 12345) % 2147483647;
    return seed / 2147483647;
  };
}

function extension_integer (min, max) {
  if (max == null) {
    max = min;
    min = 0;
  }
  let a, b, d;
  const dist = {
    min(_) {
      if (arguments.length) {
        a = _ || 0;
        d = b - a;
        return dist;
      } else {
        return a;
      }
    },
    max(_) {
      if (arguments.length) {
        b = _ || 0;
        d = b - a;
        return dist;
      } else {
        return b;
      }
    },
    sample() {
      return a + Math.floor(d * extension_vega_statistics_module_random());
    },
    pdf(x) {
      return x === Math.floor(x) && x >= a && x < b ? 1 / d : 0;
    },
    cdf(x) {
      const v = Math.floor(x);
      return v < a ? 0 : v >= b ? 1 : (v - a + 1) / d;
    },
    icdf(p) {
      return p >= 0 && p <= 1 ? a - 1 + Math.floor(p * d) : NaN;
    }
  };
  return dist.min(min).max(max);
}

const extension_SQRT2PI = Math.sqrt(2 * Math.PI);
const extension_SQRT2 = Math.SQRT2;

let extension_nextSample = NaN;
function extension_sampleNormal(mean, stdev) {
  mean = mean || 0;
  stdev = stdev == null ? 1 : stdev;
  let x = 0,
    y = 0,
    rds,
    c;
  if (extension_nextSample === extension_nextSample) {
    x = extension_nextSample;
    extension_nextSample = NaN;
  } else {
    do {
      x = extension_vega_statistics_module_random() * 2 - 1;
      y = extension_vega_statistics_module_random() * 2 - 1;
      rds = x * x + y * y;
    } while (rds === 0 || rds > 1);
    c = Math.sqrt(-2 * Math.log(rds) / rds); // Box-Muller transform
    x *= c;
    extension_nextSample = y * c;
  }
  return mean + x * stdev;
}
function extension_densityNormal(value, mean, stdev) {
  stdev = stdev == null ? 1 : stdev;
  const z = (value - (mean || 0)) / stdev;
  return Math.exp(-0.5 * z * z) / (stdev * extension_SQRT2PI);
}

// Approximation from West (2009)
// Better Approximations to Cumulative Normal Functions
function extension_cumulativeNormal(value, mean, stdev) {
  mean = mean || 0;
  stdev = stdev == null ? 1 : stdev;
  const z = (value - mean) / stdev,
    Z = Math.abs(z);
  let cd;
  if (Z > 37) {
    cd = 0;
  } else {
    const exp = Math.exp(-Z * Z / 2);
    let sum;
    if (Z < 7.07106781186547) {
      sum = 3.52624965998911e-02 * Z + 0.700383064443688;
      sum = sum * Z + 6.37396220353165;
      sum = sum * Z + 33.912866078383;
      sum = sum * Z + 112.079291497871;
      sum = sum * Z + 221.213596169931;
      sum = sum * Z + 220.206867912376;
      cd = exp * sum;
      sum = 8.83883476483184e-02 * Z + 1.75566716318264;
      sum = sum * Z + 16.064177579207;
      sum = sum * Z + 86.7807322029461;
      sum = sum * Z + 296.564248779674;
      sum = sum * Z + 637.333633378831;
      sum = sum * Z + 793.826512519948;
      sum = sum * Z + 440.413735824752;
      cd = cd / sum;
    } else {
      sum = Z + 0.65;
      sum = Z + 4 / sum;
      sum = Z + 3 / sum;
      sum = Z + 2 / sum;
      sum = Z + 1 / sum;
      cd = exp / sum / 2.506628274631;
    }
  }
  return z > 0 ? 1 - cd : cd;
}

// Approximation of Probit function using inverse error function.
function extension_quantileNormal(p, mean, stdev) {
  if (p < 0 || p > 1) return NaN;
  return (mean || 0) + (stdev == null ? 1 : stdev) * extension_SQRT2 * extension_erfinv(2 * p - 1);
}

// Approximate inverse error function. Implementation from "Approximating
// the erfinv function" by Mike Giles, GPU Computing Gems, volume 2, 2010.
// Ported from Apache Commons Math, http://www.apache.org/licenses/LICENSE-2.0
function extension_erfinv(x) {
  // beware that the logarithm argument must be
  // commputed as (1.0 - x) * (1.0 + x),
  // it must NOT be simplified as 1.0 - x * x as this
  // would induce rounding errors near the boundaries +/-1
  let w = -Math.log((1 - x) * (1 + x)),
    p;
  if (w < 6.25) {
    w -= 3.125;
    p = -3.6444120640178196996e-21;
    p = -1.685059138182016589e-19 + p * w;
    p = 1.2858480715256400167e-18 + p * w;
    p = 1.115787767802518096e-17 + p * w;
    p = -1.333171662854620906e-16 + p * w;
    p = 2.0972767875968561637e-17 + p * w;
    p = 6.6376381343583238325e-15 + p * w;
    p = -4.0545662729752068639e-14 + p * w;
    p = -8.1519341976054721522e-14 + p * w;
    p = 2.6335093153082322977e-12 + p * w;
    p = -1.2975133253453532498e-11 + p * w;
    p = -5.4154120542946279317e-11 + p * w;
    p = 1.051212273321532285e-09 + p * w;
    p = -4.1126339803469836976e-09 + p * w;
    p = -2.9070369957882005086e-08 + p * w;
    p = 4.2347877827932403518e-07 + p * w;
    p = -1.3654692000834678645e-06 + p * w;
    p = -1.3882523362786468719e-05 + p * w;
    p = 0.0001867342080340571352 + p * w;
    p = -0.00074070253416626697512 + p * w;
    p = -0.0060336708714301490533 + p * w;
    p = 0.24015818242558961693 + p * w;
    p = 1.6536545626831027356 + p * w;
  } else if (w < 16.0) {
    w = Math.sqrt(w) - 3.25;
    p = 2.2137376921775787049e-09;
    p = 9.0756561938885390979e-08 + p * w;
    p = -2.7517406297064545428e-07 + p * w;
    p = 1.8239629214389227755e-08 + p * w;
    p = 1.5027403968909827627e-06 + p * w;
    p = -4.013867526981545969e-06 + p * w;
    p = 2.9234449089955446044e-06 + p * w;
    p = 1.2475304481671778723e-05 + p * w;
    p = -4.7318229009055733981e-05 + p * w;
    p = 6.8284851459573175448e-05 + p * w;
    p = 2.4031110387097893999e-05 + p * w;
    p = -0.0003550375203628474796 + p * w;
    p = 0.00095328937973738049703 + p * w;
    p = -0.0016882755560235047313 + p * w;
    p = 0.0024914420961078508066 + p * w;
    p = -0.0037512085075692412107 + p * w;
    p = 0.005370914553590063617 + p * w;
    p = 1.0052589676941592334 + p * w;
    p = 3.0838856104922207635 + p * w;
  } else if (Number.isFinite(w)) {
    w = Math.sqrt(w) - 5.0;
    p = -2.7109920616438573243e-11;
    p = -2.5556418169965252055e-10 + p * w;
    p = 1.5076572693500548083e-09 + p * w;
    p = -3.7894654401267369937e-09 + p * w;
    p = 7.6157012080783393804e-09 + p * w;
    p = -1.4960026627149240478e-08 + p * w;
    p = 2.9147953450901080826e-08 + p * w;
    p = -6.7711997758452339498e-08 + p * w;
    p = 2.2900482228026654717e-07 + p * w;
    p = -9.9298272942317002539e-07 + p * w;
    p = 4.5260625972231537039e-06 + p * w;
    p = -1.9681778105531670567e-05 + p * w;
    p = 7.5995277030017761139e-05 + p * w;
    p = -0.00021503011930044477347 + p * w;
    p = -0.00013871931833623122026 + p * w;
    p = 1.0103004648645343977 + p * w;
    p = 4.8499064014085844221 + p * w;
  } else {
    p = Infinity;
  }
  return p * x;
}
function extension_gaussian (mean, stdev) {
  let mu, sigma;
  const dist = {
    mean(_) {
      if (arguments.length) {
        mu = _ || 0;
        return dist;
      } else {
        return mu;
      }
    },
    stdev(_) {
      if (arguments.length) {
        sigma = _ == null ? 1 : _;
        return dist;
      } else {
        return sigma;
      }
    },
    sample: () => extension_sampleNormal(mu, sigma),
    pdf: value => extension_densityNormal(value, mu, sigma),
    cdf: value => extension_cumulativeNormal(value, mu, sigma),
    icdf: p => extension_quantileNormal(p, mu, sigma)
  };
  return dist.mean(mean).stdev(stdev);
}

function extension_kde (support, bandwidth) {
  const kernel = extension_gaussian();
  let n = 0;
  const dist = {
    data(_) {
      if (arguments.length) {
        support = _;
        n = _ ? _.length : 0;
        return dist.bandwidth(bandwidth);
      } else {
        return support;
      }
    },
    bandwidth(_) {
      if (!arguments.length) return bandwidth;
      bandwidth = _;
      if (!bandwidth && support) bandwidth = extension_estimateBandwidth(support);
      return dist;
    },
    sample() {
      return support[~~(extension_vega_statistics_module_random() * n)] + bandwidth * kernel.sample();
    },
    pdf(x) {
      let y = 0,
        i = 0;
      for (; i < n; ++i) {
        y += kernel.pdf((x - support[i]) / bandwidth);
      }
      return y / bandwidth / n;
    },
    cdf(x) {
      let y = 0,
        i = 0;
      for (; i < n; ++i) {
        y += kernel.cdf((x - support[i]) / bandwidth);
      }
      return y / n;
    },
    icdf() {
      throw Error('KDE icdf not supported.');
    }
  };
  return dist.data(support);
}

function extension_sampleLogNormal(mean, stdev) {
  mean = mean || 0;
  stdev = stdev == null ? 1 : stdev;
  return Math.exp(mean + extension_sampleNormal() * stdev);
}
function extension_densityLogNormal(value, mean, stdev) {
  if (value <= 0) return 0;
  mean = mean || 0;
  stdev = stdev == null ? 1 : stdev;
  const z = (Math.log(value) - mean) / stdev;
  return Math.exp(-0.5 * z * z) / (stdev * extension_SQRT2PI * value);
}
function extension_cumulativeLogNormal(value, mean, stdev) {
  return extension_cumulativeNormal(Math.log(value), mean, stdev);
}
function extension_quantileLogNormal(p, mean, stdev) {
  return Math.exp(extension_quantileNormal(p, mean, stdev));
}
function extension_lognormal (mean, stdev) {
  let mu, sigma;
  const dist = {
    mean(_) {
      if (arguments.length) {
        mu = _ || 0;
        return dist;
      } else {
        return mu;
      }
    },
    stdev(_) {
      if (arguments.length) {
        sigma = _ == null ? 1 : _;
        return dist;
      } else {
        return sigma;
      }
    },
    sample: () => extension_sampleLogNormal(mu, sigma),
    pdf: value => extension_densityLogNormal(value, mu, sigma),
    cdf: value => extension_cumulativeLogNormal(value, mu, sigma),
    icdf: p => extension_quantileLogNormal(p, mu, sigma)
  };
  return dist.mean(mean).stdev(stdev);
}

function extension_mixture (dists, weights) {
  let m = 0,
    w;
  function normalize(x) {
    const w = [];
    let sum = 0,
      i;
    for (i = 0; i < m; ++i) {
      sum += w[i] = x[i] == null ? 1 : +x[i];
    }
    for (i = 0; i < m; ++i) {
      w[i] /= sum;
    }
    return w;
  }
  const dist = {
    weights(_) {
      if (arguments.length) {
        w = normalize(weights = _ || []);
        return dist;
      }
      return weights;
    },
    distributions(_) {
      if (arguments.length) {
        if (_) {
          m = _.length;
          dists = _;
        } else {
          m = 0;
          dists = [];
        }
        return dist.weights(weights);
      }
      return dists;
    },
    sample() {
      const r = extension_vega_statistics_module_random();
      let d = dists[m - 1],
        v = w[0],
        i = 0;

      // first select distribution
      for (; i < m - 1; v += w[++i]) {
        if (r < v) {
          d = dists[i];
          break;
        }
      }
      // then sample from it
      return d.sample();
    },
    pdf(x) {
      let p = 0,
        i = 0;
      for (; i < m; ++i) {
        p += w[i] * dists[i].pdf(x);
      }
      return p;
    },
    cdf(x) {
      let p = 0,
        i = 0;
      for (; i < m; ++i) {
        p += w[i] * dists[i].cdf(x);
      }
      return p;
    },
    icdf() {
      throw Error('Mixture icdf not supported.');
    }
  };
  return dist.distributions(dists).weights(weights);
}

function extension_sampleUniform(min, max) {
  if (max == null) {
    max = min == null ? 1 : min;
    min = 0;
  }
  return min + (max - min) * extension_vega_statistics_module_random();
}
function extension_densityUniform(value, min, max) {
  if (max == null) {
    max = min == null ? 1 : min;
    min = 0;
  }
  return value >= min && value <= max ? 1 / (max - min) : 0;
}
function extension_cumulativeUniform(value, min, max) {
  if (max == null) {
    max = min == null ? 1 : min;
    min = 0;
  }
  return value < min ? 0 : value > max ? 1 : (value - min) / (max - min);
}
function extension_quantileUniform(p, min, max) {
  if (max == null) {
    max = min == null ? 1 : min;
    min = 0;
  }
  return p >= 0 && p <= 1 ? min + p * (max - min) : NaN;
}
function extension_uniform (min, max) {
  let a, b;
  const dist = {
    min(_) {
      if (arguments.length) {
        a = _ || 0;
        return dist;
      } else {
        return a;
      }
    },
    max(_) {
      if (arguments.length) {
        b = _ == null ? 1 : _;
        return dist;
      } else {
        return b;
      }
    },
    sample: () => extension_sampleUniform(a, b),
    pdf: value => extension_densityUniform(value, a, b),
    cdf: value => extension_cumulativeUniform(value, a, b),
    icdf: p => extension_quantileUniform(p, a, b)
  };
  if (max == null) {
    max = min == null ? 1 : min;
    min = 0;
  }
  return dist.min(min).max(max);
}

function extension_vega_statistics_module_constant (data, x, y) {
  let mean = 0,
    n = 0;
  for (const d of data) {
    const val = y(d);
    if (x(d) == null || val == null || isNaN(val)) continue;
    mean += (val - mean) / ++n;
  }
  return {
    coef: [mean],
    predict: () => mean,
    rSquared: 0
  };
}

// Ordinary Least Squares
function extension_ols (uX, uY, uXY, uX2) {
  const delta = uX2 - uX * uX,
    slope = Math.abs(delta) < 1e-24 ? 0 : (uXY - uX * uY) / delta,
    intercept = uY - slope * uX;
  return [intercept, slope];
}

function extension_points(data, x, y, sort) {
  data = data.filter(d => {
    let u = x(d),
      v = y(d);
    return u != null && (u = +u) >= u && v != null && (v = +v) >= v;
  });
  if (sort) {
    data.sort((a, b) => x(a) - x(b));
  }
  const n = data.length,
    X = new Float64Array(n),
    Y = new Float64Array(n);

  // extract values, calculate means
  let i = 0,
    ux = 0,
    uy = 0,
    xv,
    yv,
    d;
  for (d of data) {
    X[i] = xv = +x(d);
    Y[i] = yv = +y(d);
    ++i;
    ux += (xv - ux) / i;
    uy += (yv - uy) / i;
  }

  // mean center the data
  for (i = 0; i < n; ++i) {
    X[i] -= ux;
    Y[i] -= uy;
  }
  return [X, Y, ux, uy];
}
function extension_visitPoints(data, x, y, callback) {
  let i = -1,
    u,
    v;
  for (const d of data) {
    u = x(d);
    v = y(d);
    if (u != null && (u = +u) >= u && v != null && (v = +v) >= v) {
      callback(u, v, ++i);
    }
  }
}

// Adapted from d3-regression by Harry Stevens
// License: https://github.com/HarryStevens/d3-regression/blob/master/LICENSE
function extension_rSquared (data, x, y, uY, predict) {
  let SSE = 0,
    SST = 0;
  extension_visitPoints(data, x, y, (dx, dy) => {
    const sse = dy - predict(dx),
      sst = dy - uY;
    SSE += sse * sse;
    SST += sst * sst;
  });
  return 1 - SSE / SST;
}

// Adapted from d3-regression by Harry Stevens
// License: https://github.com/HarryStevens/d3-regression/blob/master/LICENSE
function extension_linear (data, x, y) {
  let X = 0,
    Y = 0,
    XY = 0,
    X2 = 0,
    n = 0;
  extension_visitPoints(data, x, y, (dx, dy) => {
    ++n;
    X += (dx - X) / n;
    Y += (dy - Y) / n;
    XY += (dx * dy - XY) / n;
    X2 += (dx * dx - X2) / n;
  });
  const coef = extension_ols(X, Y, XY, X2),
    predict = x => coef[0] + coef[1] * x;
  return {
    coef: coef,
    predict: predict,
    rSquared: extension_rSquared(data, x, y, Y, predict)
  };
}

// Adapted from d3-regression by Harry Stevens
// License: https://github.com/HarryStevens/d3-regression/blob/master/LICENSE
function extension_vega_statistics_module_log (data, x, y) {
  let X = 0,
    Y = 0,
    XY = 0,
    X2 = 0,
    n = 0;
  extension_visitPoints(data, x, y, (dx, dy) => {
    ++n;
    dx = Math.log(dx);
    X += (dx - X) / n;
    Y += (dy - Y) / n;
    XY += (dx * dy - XY) / n;
    X2 += (dx * dx - X2) / n;
  });
  const coef = extension_ols(X, Y, XY, X2),
    predict = x => coef[0] + coef[1] * Math.log(x);
  return {
    coef: coef,
    predict: predict,
    rSquared: extension_rSquared(data, x, y, Y, predict)
  };
}

function extension_vega_statistics_module_exp (data, x, y) {
  // eslint-disable-next-line no-unused-vars
  const [xv, yv, ux, uy] = extension_points(data, x, y);
  let YL = 0,
    XY = 0,
    XYL = 0,
    X2Y = 0,
    n = 0,
    dx,
    ly,
    xy;
  extension_visitPoints(data, x, y, (_, dy) => {
    dx = xv[n++];
    ly = Math.log(dy);
    xy = dx * dy;
    YL += (dy * ly - YL) / n;
    XY += (xy - XY) / n;
    XYL += (xy * ly - XYL) / n;
    X2Y += (dx * xy - X2Y) / n;
  });
  const [c0, c1] = extension_ols(XY / uy, YL / uy, XYL / uy, X2Y / uy),
    predict = x => Math.exp(c0 + c1 * (x - ux));
  return {
    coef: [Math.exp(c0 - c1 * ux), c1],
    predict: predict,
    rSquared: extension_rSquared(data, x, y, uy, predict)
  };
}

// Adapted from d3-regression by Harry Stevens
// License: https://github.com/HarryStevens/d3-regression/blob/master/LICENSE
function extension_vega_statistics_module_pow (data, x, y) {
  let X = 0,
    Y = 0,
    XY = 0,
    X2 = 0,
    YS = 0,
    n = 0;
  extension_visitPoints(data, x, y, (dx, dy) => {
    const lx = Math.log(dx),
      ly = Math.log(dy);
    ++n;
    X += (lx - X) / n;
    Y += (ly - Y) / n;
    XY += (lx * ly - XY) / n;
    X2 += (lx * lx - X2) / n;
    YS += (dy - YS) / n;
  });
  const coef = extension_ols(X, Y, XY, X2),
    predict = x => coef[0] * Math.pow(x, coef[1]);
  coef[0] = Math.exp(coef[0]);
  return {
    coef: coef,
    predict: predict,
    rSquared: extension_rSquared(data, x, y, YS, predict)
  };
}

function extension_quad (data, x, y) {
  const [xv, yv, ux, uy] = extension_points(data, x, y),
    n = xv.length;
  let X2 = 0,
    X3 = 0,
    X4 = 0,
    XY = 0,
    X2Y = 0,
    i,
    dx,
    dy,
    x2;
  for (i = 0; i < n;) {
    dx = xv[i];
    dy = yv[i++];
    x2 = dx * dx;
    X2 += (x2 - X2) / i;
    X3 += (x2 * dx - X3) / i;
    X4 += (x2 * x2 - X4) / i;
    XY += (dx * dy - XY) / i;
    X2Y += (x2 * dy - X2Y) / i;
  }
  const X2X2 = X4 - X2 * X2,
    d = X2 * X2X2 - X3 * X3,
    a = (X2Y * X2 - XY * X3) / d,
    b = (XY * X2X2 - X2Y * X3) / d,
    c = -a * X2,
    predict = x => {
      x = x - ux;
      return a * x * x + b * x + c + uy;
    };

  // transform coefficients back from mean-centered space
  return {
    coef: [c - b * ux + a * ux * ux + uy, b - 2 * a * ux, a],
    predict: predict,
    rSquared: extension_rSquared(data, x, y, uy, predict)
  };
}

// Adapted from d3-regression by Harry Stevens
// License: https://github.com/HarryStevens/d3-regression/blob/master/LICENSE
// ... which was adapted from regression-js by Tom Alexander
// Source: https://github.com/Tom-Alexander/regression-js/blob/master/src/regression.js#L246
// License: https://github.com/Tom-Alexander/regression-js/blob/master/LICENSE
function extension_poly (data, x, y, order) {
  // use more efficient methods for lower orders
  if (order === 0) return extension_vega_statistics_module_constant(data, x, y);
  if (order === 1) return extension_linear(data, x, y);
  if (order === 2) return extension_quad(data, x, y);
  const [xv, yv, ux, uy] = extension_points(data, x, y),
    n = xv.length,
    lhs = [],
    rhs = [],
    k = order + 1;
  let i, j, l, v, c;
  for (i = 0; i < k; ++i) {
    for (l = 0, v = 0; l < n; ++l) {
      v += Math.pow(xv[l], i) * yv[l];
    }
    lhs.push(v);
    c = new Float64Array(k);
    for (j = 0; j < k; ++j) {
      for (l = 0, v = 0; l < n; ++l) {
        v += Math.pow(xv[l], i + j);
      }
      c[j] = v;
    }
    rhs.push(c);
  }
  rhs.push(lhs);
  const coef = extension_gaussianElimination(rhs),
    predict = x => {
      x -= ux;
      let y = uy + coef[0] + coef[1] * x + coef[2] * x * x;
      for (i = 3; i < k; ++i) y += coef[i] * Math.pow(x, i);
      return y;
    };
  return {
    coef: extension_uncenter(k, coef, -ux, uy),
    predict: predict,
    rSquared: extension_rSquared(data, x, y, uy, predict)
  };
}
function extension_uncenter(k, a, x, y) {
  const z = Array(k);
  let i, j, v, c;

  // initialize to zero
  for (i = 0; i < k; ++i) z[i] = 0;

  // polynomial expansion
  for (i = k - 1; i >= 0; --i) {
    v = a[i];
    c = 1;
    z[i] += v;
    for (j = 1; j <= i; ++j) {
      c *= (i + 1 - j) / j; // binomial coefficent
      z[i - j] += v * Math.pow(x, j) * c;
    }
  }

  // bias term
  z[0] += y;
  return z;
}

// Given an array for a two-dimensional matrix and the polynomial order,
// solve A * x = b using Gaussian elimination.
function extension_gaussianElimination(matrix) {
  const n = matrix.length - 1,
    coef = [];
  let i, j, k, r, t;
  for (i = 0; i < n; ++i) {
    r = i; // max row
    for (j = i + 1; j < n; ++j) {
      if (Math.abs(matrix[i][j]) > Math.abs(matrix[i][r])) {
        r = j;
      }
    }
    for (k = i; k < n + 1; ++k) {
      t = matrix[k][i];
      matrix[k][i] = matrix[k][r];
      matrix[k][r] = t;
    }
    for (j = i + 1; j < n; ++j) {
      for (k = n; k >= i; k--) {
        matrix[k][j] -= matrix[k][i] * matrix[i][j] / matrix[i][i];
      }
    }
  }
  for (j = n - 1; j >= 0; --j) {
    t = 0;
    for (k = j + 1; k < n; ++k) {
      t += matrix[k][j] * coef[k];
    }
    coef[j] = (matrix[n][j] - t) / matrix[j][j];
  }
  return coef;
}

const extension_maxiters = 2,
  extension_epsilon = 1e-12;

// Adapted from science.js by Jason Davies
// Source: https://github.com/jasondavies/science.js/blob/master/src/stats/loess.js
// License: https://github.com/jasondavies/science.js/blob/master/LICENSE
function extension_loess (data, x, y, bandwidth) {
  const [xv, yv, ux, uy] = extension_points(data, x, y, true),
    n = xv.length,
    bw = Math.max(2, ~~(bandwidth * n)),
    // # nearest neighbors
    yhat = new Float64Array(n),
    residuals = new Float64Array(n),
    robustWeights = new Float64Array(n).fill(1);
  for (let iter = -1; ++iter <= extension_maxiters;) {
    const interval = [0, bw - 1];
    for (let i = 0; i < n; ++i) {
      const dx = xv[i],
        i0 = interval[0],
        i1 = interval[1],
        edge = dx - xv[i0] > xv[i1] - dx ? i0 : i1;
      let W = 0,
        X = 0,
        Y = 0,
        XY = 0,
        X2 = 0;
      const denom = 1 / Math.abs(xv[edge] - dx || 1); // avoid singularity!

      for (let k = i0; k <= i1; ++k) {
        const xk = xv[k],
          yk = yv[k],
          w = extension_tricube(Math.abs(dx - xk) * denom) * robustWeights[k],
          xkw = xk * w;
        W += w;
        X += xkw;
        Y += yk * w;
        XY += yk * xkw;
        X2 += xk * xkw;
      }

      // linear regression fit
      const [a, b] = extension_ols(X / W, Y / W, XY / W, X2 / W);
      yhat[i] = a + b * dx;
      residuals[i] = Math.abs(yv[i] - yhat[i]);
      extension_updateInterval(xv, i + 1, interval);
    }
    if (iter === extension_maxiters) {
      break;
    }
    const medianResidual = extension_median(residuals);
    if (Math.abs(medianResidual) < extension_epsilon) break;
    for (let i = 0, arg, w; i < n; ++i) {
      arg = residuals[i] / (6 * medianResidual);
      // default to epsilon (rather than zero) for large deviations
      // keeping weights tiny but non-zero prevents singularites
      robustWeights[i] = arg >= 1 ? extension_epsilon : (w = 1 - arg * arg) * w;
    }
  }
  return extension_vega_statistics_module_output(xv, yhat, ux, uy);
}

// weighting kernel for local regression
function extension_tricube(x) {
  return (x = 1 - x * x * x) * x * x;
}

// advance sliding window interval of nearest neighbors
function extension_updateInterval(xv, i, interval) {
  const val = xv[i];
  let left = interval[0],
    right = interval[1] + 1;
  if (right >= xv.length) return;

  // step right if distance to new right edge is <= distance to old left edge
  // step when distance is equal to ensure movement over duplicate x values
  while (i > left && xv[right] - val <= val - xv[left]) {
    interval[0] = ++left;
    interval[1] = right;
    ++right;
  }
}

// generate smoothed output points
// average points with repeated x values
function extension_vega_statistics_module_output(xv, yhat, ux, uy) {
  const n = xv.length,
    out = [];
  let i = 0,
    cnt = 0,
    prev = [],
    v;
  for (; i < n; ++i) {
    v = xv[i] + ux;
    if (prev[0] === v) {
      // average output values via online update
      prev[1] += (yhat[i] - prev[1]) / ++cnt;
    } else {
      // add new output point
      cnt = 0;
      prev[1] += uy;
      prev = [v, yhat[i]];
      out.push(prev);
    }
  }
  prev[1] += uy;
  return out;
}

// subdivide up to accuracy of 0.5 degrees
const extension_MIN_RADIANS = 0.5 * Math.PI / 180;

// Adaptively sample an interpolated function over a domain extent
function extension_sampleCurve (f, extent, minSteps, maxSteps) {
  minSteps = minSteps || 25;
  maxSteps = Math.max(minSteps, maxSteps || 200);
  const point = x => [x, f(x)],
    minX = extent[0],
    maxX = extent[1],
    span = maxX - minX,
    stop = span / maxSteps,
    prev = [point(minX)],
    next = [];
  if (minSteps === maxSteps) {
    // no adaptation, sample uniform grid directly and return
    for (let i = 1; i < maxSteps; ++i) {
      prev.push(point(minX + i / minSteps * span));
    }
    prev.push(point(maxX));
    return prev;
  } else {
    // sample minimum points on uniform grid
    // then move on to perform adaptive refinement
    next.push(point(maxX));
    for (let i = minSteps; --i > 0;) {
      next.push(point(minX + i / minSteps * span));
    }
  }
  let p0 = prev[0];
  let p1 = next[next.length - 1];
  const sx = 1 / span;
  const sy = extension_scaleY(p0[1], next);
  while (p1) {
    // midpoint for potential curve subdivision
    const pm = point((p0[0] + p1[0]) / 2);
    const dx = pm[0] - p0[0] >= stop;
    if (dx && extension_angleDelta(p0, pm, p1, sx, sy) > extension_MIN_RADIANS) {
      // maximum resolution has not yet been met, and
      // subdivision midpoint is sufficiently different from endpoint
      // save subdivision, push midpoint onto the visitation stack
      next.push(pm);
    } else {
      // subdivision midpoint sufficiently similar to endpoint
      // skip subdivision, store endpoint, move to next point on the stack
      p0 = p1;
      prev.push(p1);
      next.pop();
    }
    p1 = next[next.length - 1];
  }
  return prev;
}
function extension_scaleY(init, points) {
  let ymin = init;
  let ymax = init;
  const n = points.length;
  for (let i = 0; i < n; ++i) {
    const y = points[i][1];
    if (y < ymin) ymin = y;
    if (y > ymax) ymax = y;
  }
  return 1 / (ymax - ymin);
}
function extension_angleDelta(p, q, r, sx, sy) {
  const a0 = Math.atan2(sy * (r[1] - p[1]), sx * (r[0] - p[0])),
    a1 = Math.atan2(sy * (q[1] - p[1]), sx * (q[0] - p[0]));
  return Math.abs(a0 - a1);
}



;// ../../node_modules/d3-array/src/mean.js
function extension_mean(values, valueof) {
  let count = 0;
  let sum = 0;
  if (valueof === undefined) {
    for (let value of values) {
      if (value != null && (value = +value) >= value) {
        ++count, sum += value;
      }
    }
  } else {
    let index = -1;
    for (let value of values) {
      if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {
        ++count, sum += value;
      }
    }
  }
  if (count) return sum / count;
}

;// ../../node_modules/d3-array/src/range.js
function extension_range_range(start, stop, step) {
  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;

  var i = -1,
      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
      range = new Array(n);

  while (++i < n) {
    range[i] = start + i * step;
  }

  return range;
}

;// ../../node_modules/vega-transforms/build/vega-transforms.module.js






function extension_multikey(f) {
  return x => {
    const n = f.length;
    let i = 1,
      k = String(f[0](x));
    for (; i < n; ++i) {
      k += '|' + f[i](x);
    }
    return k;
  };
}
function extension_groupkey(fields) {
  return !fields || !fields.length ? function () {
    return '';
  } : fields.length === 1 ? fields[0] : extension_multikey(fields);
}

function extension_measureName(op, field, as) {
  return as || op + (!field ? '' : '_' + field);
}
const extension_vega_transforms_module_noop = () => {};
const extension_base_op = {
  init: extension_vega_transforms_module_noop,
  add: extension_vega_transforms_module_noop,
  rem: extension_vega_transforms_module_noop,
  idx: 0
};
const extension_AggregateOps = {
  values: {
    init: m => m.cell.store = true,
    value: m => m.cell.data.values(),
    idx: -1
  },
  count: {
    value: m => m.cell.num
  },
  __count__: {
    value: m => m.missing + m.valid
  },
  missing: {
    value: m => m.missing
  },
  valid: {
    value: m => m.valid
  },
  sum: {
    init: m => m.sum = 0,
    value: m => m.valid ? m.sum : undefined,
    add: (m, v) => m.sum += +v,
    rem: (m, v) => m.sum -= v
  },
  product: {
    init: m => m.product = 1,
    value: m => m.valid ? m.product : undefined,
    add: (m, v) => m.product *= v,
    rem: (m, v) => m.product /= v
  },
  mean: {
    init: m => m.mean = 0,
    value: m => m.valid ? m.mean : undefined,
    add: (m, v) => (m.mean_d = v - m.mean, m.mean += m.mean_d / m.valid),
    rem: (m, v) => (m.mean_d = v - m.mean, m.mean -= m.valid ? m.mean_d / m.valid : m.mean)
  },
  average: {
    value: m => m.valid ? m.mean : undefined,
    req: ['mean'],
    idx: 1
  },
  variance: {
    init: m => m.dev = 0,
    value: m => m.valid > 1 ? m.dev / (m.valid - 1) : undefined,
    add: (m, v) => m.dev += m.mean_d * (v - m.mean),
    rem: (m, v) => m.dev -= m.mean_d * (v - m.mean),
    req: ['mean'],
    idx: 1
  },
  variancep: {
    value: m => m.valid > 1 ? m.dev / m.valid : undefined,
    req: ['variance'],
    idx: 2
  },
  stdev: {
    value: m => m.valid > 1 ? Math.sqrt(m.dev / (m.valid - 1)) : undefined,
    req: ['variance'],
    idx: 2
  },
  stdevp: {
    value: m => m.valid > 1 ? Math.sqrt(m.dev / m.valid) : undefined,
    req: ['variance'],
    idx: 2
  },
  stderr: {
    value: m => m.valid > 1 ? Math.sqrt(m.dev / (m.valid * (m.valid - 1))) : undefined,
    req: ['variance'],
    idx: 2
  },
  distinct: {
    value: m => m.cell.data.distinct(m.get),
    req: ['values'],
    idx: 3
  },
  ci0: {
    value: m => m.cell.data.ci0(m.get),
    req: ['values'],
    idx: 3
  },
  ci1: {
    value: m => m.cell.data.ci1(m.get),
    req: ['values'],
    idx: 3
  },
  median: {
    value: m => m.cell.data.q2(m.get),
    req: ['values'],
    idx: 3
  },
  q1: {
    value: m => m.cell.data.q1(m.get),
    req: ['values'],
    idx: 3
  },
  q3: {
    value: m => m.cell.data.q3(m.get),
    req: ['values'],
    idx: 3
  },
  min: {
    init: m => m.min = undefined,
    value: m => m.min = Number.isNaN(m.min) ? m.cell.data.min(m.get) : m.min,
    add: (m, v) => {
      if (v < m.min || m.min === undefined) m.min = v;
    },
    rem: (m, v) => {
      if (v <= m.min) m.min = NaN;
    },
    req: ['values'],
    idx: 4
  },
  max: {
    init: m => m.max = undefined,
    value: m => m.max = Number.isNaN(m.max) ? m.cell.data.max(m.get) : m.max,
    add: (m, v) => {
      if (v > m.max || m.max === undefined) m.max = v;
    },
    rem: (m, v) => {
      if (v >= m.max) m.max = NaN;
    },
    req: ['values'],
    idx: 4
  },
  argmin: {
    init: m => m.argmin = undefined,
    value: m => m.argmin || m.cell.data.argmin(m.get),
    add: (m, v, t) => {
      if (v < m.min) m.argmin = t;
    },
    rem: (m, v) => {
      if (v <= m.min) m.argmin = undefined;
    },
    req: ['min', 'values'],
    idx: 3
  },
  argmax: {
    init: m => m.argmax = undefined,
    value: m => m.argmax || m.cell.data.argmax(m.get),
    add: (m, v, t) => {
      if (v > m.max) m.argmax = t;
    },
    rem: (m, v) => {
      if (v >= m.max) m.argmax = undefined;
    },
    req: ['max', 'values'],
    idx: 3
  },
  exponential: {
    init: (m, r) => {
      m.exp = 0;
      m.exp_r = r;
    },
    value: m => m.valid ? m.exp * (1 - m.exp_r) / (1 - m.exp_r ** m.valid) : undefined,
    add: (m, v) => m.exp = m.exp_r * m.exp + v,
    rem: (m, v) => m.exp = (m.exp - v / m.exp_r ** (m.valid - 1)) / m.exp_r
  },
  exponentialb: {
    value: m => m.valid ? m.exp * (1 - m.exp_r) : undefined,
    req: ['exponential'],
    idx: 1
  }
};
const extension_ValidAggregateOps = Object.keys(extension_AggregateOps).filter(d => d !== '__count__');
function extension_measure(key, value) {
  return (out, aggregate_param) => extension_extend({
    name: key,
    aggregate_param: aggregate_param,
    out: out || key
  }, extension_base_op, value);
}
[...extension_ValidAggregateOps, '__count__'].forEach(key => {
  extension_AggregateOps[key] = extension_measure(key, extension_AggregateOps[key]);
});
function extension_createMeasure(op, param, name) {
  return extension_AggregateOps[op](name, param);
}
function extension_compareIndex(a, b) {
  return a.idx - b.idx;
}
function extension_vega_transforms_module_resolve(agg) {
  const map = {};
  agg.forEach(a => map[a.name] = a);
  const getreqs = a => {
    if (!a.req) return;
    a.req.forEach(key => {
      if (!map[key]) getreqs(map[key] = extension_AggregateOps[key]());
    });
  };
  agg.forEach(getreqs);
  return Object.values(map).sort(extension_compareIndex);
}
function extension_vega_transforms_module_init() {
  this.valid = 0;
  this.missing = 0;
  this._ops.forEach(op => op.aggregate_param == null ? op.init(this) : op.init(this, op.aggregate_param));
}
function extension_vega_transforms_module_add(v, t) {
  if (v == null || v === '') {
    ++this.missing;
    return;
  }
  if (v !== v) return;
  ++this.valid;
  this._ops.forEach(op => op.add(this, v, t));
}
function extension_rem(v, t) {
  if (v == null || v === '') {
    --this.missing;
    return;
  }
  if (v !== v) return;
  --this.valid;
  this._ops.forEach(op => op.rem(this, v, t));
}
function extension_set(t) {
  this._out.forEach(op => t[op.out] = op.value(this));
  return t;
}
function extension_compileMeasures(agg, field) {
  const get = field || extension_vega_util_module_identity,
    ops = extension_vega_transforms_module_resolve(agg),
    out = agg.slice().sort(extension_compareIndex);
  function ctr(cell) {
    this._ops = ops;
    this._out = out;
    this.cell = cell;
    this.init();
  }
  ctr.prototype.init = extension_vega_transforms_module_init;
  ctr.prototype.add = extension_vega_transforms_module_add;
  ctr.prototype.rem = extension_rem;
  ctr.prototype.set = extension_set;
  ctr.prototype.get = get;
  ctr.fields = agg.map(op => op.out);
  return ctr;
}

function extension_TupleStore(key) {
  this._key = key ? extension_vega_util_module_field(key) : extension_tupleid;
  this.reset();
}
const extension_prototype$1 = extension_TupleStore.prototype;
extension_prototype$1.reset = function () {
  this._add = [];
  this._rem = [];
  this._ext = null;
  this._get = null;
  this._q = null;
};
extension_prototype$1.add = function (v) {
  this._add.push(v);
};
extension_prototype$1.rem = function (v) {
  this._rem.push(v);
};
extension_prototype$1.values = function () {
  this._get = null;
  if (this._rem.length === 0) return this._add;
  const a = this._add,
    r = this._rem,
    k = this._key,
    n = a.length,
    m = r.length,
    x = Array(n - m),
    map = {};
  let i, j, v;

  // use unique key field to clear removed values
  for (i = 0; i < m; ++i) {
    map[k(r[i])] = 1;
  }
  for (i = 0, j = 0; i < n; ++i) {
    if (map[k(v = a[i])]) {
      map[k(v)] = 0;
    } else {
      x[j++] = v;
    }
  }
  this._rem = [];
  return this._add = x;
};

// memoizing statistics methods

extension_prototype$1.distinct = function (get) {
  const v = this.values(),
    map = {};
  let n = v.length,
    count = 0,
    s;
  while (--n >= 0) {
    s = get(v[n]) + '';
    if (!extension_vega_util_module_has(map, s)) {
      map[s] = 1;
      ++count;
    }
  }
  return count;
};
extension_prototype$1.extent = function (get) {
  if (this._get !== get || !this._ext) {
    const v = this.values(),
      i = extension_extentIndex(v, get);
    this._ext = [v[i[0]], v[i[1]]];
    this._get = get;
  }
  return this._ext;
};
extension_prototype$1.argmin = function (get) {
  return this.extent(get)[0] || {};
};
extension_prototype$1.argmax = function (get) {
  return this.extent(get)[1] || {};
};
extension_prototype$1.min = function (get) {
  const m = this.extent(get)[0];
  return m != null ? get(m) : undefined;
};
extension_prototype$1.max = function (get) {
  const m = this.extent(get)[1];
  return m != null ? get(m) : undefined;
};
extension_prototype$1.quartile = function (get) {
  if (this._get !== get || !this._q) {
    this._q = extension_quartiles(this.values(), get);
    this._get = get;
  }
  return this._q;
};
extension_prototype$1.q1 = function (get) {
  return this.quartile(get)[0];
};
extension_prototype$1.q2 = function (get) {
  return this.quartile(get)[1];
};
extension_prototype$1.q3 = function (get) {
  return this.quartile(get)[2];
};
extension_prototype$1.ci = function (get) {
  if (this._get !== get || !this._ci) {
    this._ci = extension_bootstrapCI(this.values(), 1000, 0.05, get);
    this._get = get;
  }
  return this._ci;
};
extension_prototype$1.ci0 = function (get) {
  return this.ci(get)[0];
};
extension_prototype$1.ci1 = function (get) {
  return this.ci(get)[1];
};

/**
 * Group-by aggregation operator.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<function(object): *>} [params.groupby] - An array of accessors to groupby.
 * @param {Array<function(object): *>} [params.fields] - An array of accessors to aggregate.
 * @param {Array<string>} [params.ops] - An array of strings indicating aggregation operations.
 * @param {Array<number>} [params.aggregate_params] - An optional array of parameters for aggregation operations.
 * @param {Array<string>} [params.as] - An array of output field names for aggregated values.
 * @param {boolean} [params.cross=false] - A flag indicating that the full
 *   cross-product of groupby values should be generated, including empty cells.
 *   If true, the drop parameter is ignored and empty cells are retained.
 * @param {boolean} [params.drop=true] - A flag indicating if empty cells should be removed.
 */
function extension_Aggregate(params) {
  extension_Transform.call(this, null, params);
  this._adds = []; // array of added output tuples
  this._mods = []; // array of modified output tuples
  this._alen = 0; // number of active added tuples
  this._mlen = 0; // number of active modified tuples
  this._drop = true; // should empty aggregation cells be removed
  this._cross = false; // produce full cross-product of group-by values

  this._dims = []; // group-by dimension accessors
  this._dnames = []; // group-by dimension names

  this._measures = []; // collection of aggregation monoids
  this._countOnly = false; // flag indicating only count aggregation
  this._counts = null; // collection of count fields
  this._prev = null; // previous aggregation cells

  this._inputs = null; // array of dependent input tuple field names
  this._outputs = null; // array of output tuple field names
}
extension_Aggregate.Definition = {
  'type': 'Aggregate',
  'metadata': {
    'generates': true,
    'changes': true
  },
  'params': [{
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'ops',
    'type': 'enum',
    'array': true,
    'values': extension_ValidAggregateOps
  }, {
    'name': 'aggregate_params',
    'type': 'number',
    'null': true,
    'array': true
  }, {
    'name': 'fields',
    'type': 'field',
    'null': true,
    'array': true
  }, {
    'name': 'as',
    'type': 'string',
    'null': true,
    'array': true
  }, {
    'name': 'drop',
    'type': 'boolean',
    'default': true
  }, {
    'name': 'cross',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'key',
    'type': 'field'
  }]
};
extension_inherits(extension_Aggregate, extension_Transform, {
  transform(_, pulse) {
    const aggr = this,
      out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS),
      mod = _.modified();
    aggr.stamp = out.stamp;
    if (aggr.value && (mod || pulse.modified(aggr._inputs, true))) {
      aggr._prev = aggr.value;
      aggr.value = mod ? aggr.init(_) : Object.create(null);
      pulse.visit(pulse.SOURCE, t => aggr.add(t));
    } else {
      aggr.value = aggr.value || aggr.init(_);
      pulse.visit(pulse.REM, t => aggr.rem(t));
      pulse.visit(pulse.ADD, t => aggr.add(t));
    }

    // Indicate output fields and return aggregate tuples.
    out.modifies(aggr._outputs);

    // Should empty cells be dropped?
    aggr._drop = _.drop !== false;

    // If domain cross-product requested, generate empty cells as needed
    // and ensure that empty cells are not dropped
    if (_.cross && aggr._dims.length > 1) {
      aggr._drop = false;
      aggr.cross();
    }
    if (pulse.clean() && aggr._drop) {
      out.clean(true).runAfter(() => this.clean());
    }
    return aggr.changes(out);
  },
  cross() {
    const aggr = this,
      curr = aggr.value,
      dims = aggr._dnames,
      vals = dims.map(() => ({})),
      n = dims.length;

    // collect all group-by domain values
    function collect(cells) {
      let key, i, t, v;
      for (key in cells) {
        t = cells[key].tuple;
        for (i = 0; i < n; ++i) {
          vals[i][v = t[dims[i]]] = v;
        }
      }
    }
    collect(aggr._prev);
    collect(curr);

    // iterate over key cross-product, create cells as needed
    function generate(base, tuple, index) {
      const name = dims[index],
        v = vals[index++];
      for (const k in v) {
        const key = base ? base + '|' + k : k;
        tuple[name] = v[k];
        if (index < n) generate(key, tuple, index);else if (!curr[key]) aggr.cell(key, tuple);
      }
    }
    generate('', {}, 0);
  },
  init(_) {
    // initialize input and output fields
    const inputs = this._inputs = [],
      outputs = this._outputs = [],
      inputMap = {};
    function inputVisit(get) {
      const fields = extension_vega_util_module_array(extension_accessorFields(get)),
        n = fields.length;
      let i = 0,
        f;
      for (; i < n; ++i) {
        if (!inputMap[f = fields[i]]) {
          inputMap[f] = 1;
          inputs.push(f);
        }
      }
    }

    // initialize group-by dimensions
    this._dims = extension_vega_util_module_array(_.groupby);
    this._dnames = this._dims.map(d => {
      const dname = extension_accessorName(d);
      inputVisit(d);
      outputs.push(dname);
      return dname;
    });
    this.cellkey = _.key ? _.key : extension_groupkey(this._dims);

    // initialize aggregate measures
    this._countOnly = true;
    this._counts = [];
    this._measures = [];
    const fields = _.fields || [null],
      ops = _.ops || ['count'],
      aggregate_params = _.aggregate_params || [null],
      as = _.as || [],
      n = fields.length,
      map = {};
    let field, op, aggregate_param, m, mname, outname, i;
    if (n !== ops.length) {
      extension_vega_util_module_error('Unmatched number of fields and aggregate ops.');
    }
    for (i = 0; i < n; ++i) {
      field = fields[i];
      op = ops[i];
      aggregate_param = aggregate_params[i] || null;
      if (field == null && op !== 'count') {
        extension_vega_util_module_error('Null aggregate field specified.');
      }
      mname = extension_accessorName(field);
      outname = extension_measureName(op, mname, as[i]);
      outputs.push(outname);
      if (op === 'count') {
        this._counts.push(outname);
        continue;
      }
      m = map[mname];
      if (!m) {
        inputVisit(field);
        m = map[mname] = [];
        m.field = field;
        this._measures.push(m);
      }
      if (op !== 'count') this._countOnly = false;
      m.push(extension_createMeasure(op, aggregate_param, outname));
    }
    this._measures = this._measures.map(m => extension_compileMeasures(m, m.field));
    return Object.create(null); // aggregation cells (this.value)
  },
  // -- Cell Management -----

  cellkey: extension_groupkey(),
  cell(key, t) {
    let cell = this.value[key];
    if (!cell) {
      cell = this.value[key] = this.newcell(key, t);
      this._adds[this._alen++] = cell;
    } else if (cell.num === 0 && this._drop && cell.stamp < this.stamp) {
      cell.stamp = this.stamp;
      this._adds[this._alen++] = cell;
    } else if (cell.stamp < this.stamp) {
      cell.stamp = this.stamp;
      this._mods[this._mlen++] = cell;
    }
    return cell;
  },
  newcell(key, t) {
    const cell = {
      key: key,
      num: 0,
      agg: null,
      tuple: this.newtuple(t, this._prev && this._prev[key]),
      stamp: this.stamp,
      store: false
    };
    if (!this._countOnly) {
      const measures = this._measures,
        n = measures.length;
      cell.agg = Array(n);
      for (let i = 0; i < n; ++i) {
        cell.agg[i] = new measures[i](cell);
      }
    }
    if (cell.store) {
      cell.data = new extension_TupleStore();
    }
    return cell;
  },
  newtuple(t, p) {
    const names = this._dnames,
      dims = this._dims,
      n = dims.length,
      x = {};
    for (let i = 0; i < n; ++i) {
      x[names[i]] = dims[i](t);
    }
    return p ? extension_replace(p.tuple, x) : extension_ingest$1(x);
  },
  clean() {
    const cells = this.value;
    for (const key in cells) {
      if (cells[key].num === 0) {
        delete cells[key];
      }
    }
  },
  // -- Process Tuples -----

  add(t) {
    const key = this.cellkey(t),
      cell = this.cell(key, t);
    cell.num += 1;
    if (this._countOnly) return;
    if (cell.store) cell.data.add(t);
    const agg = cell.agg;
    for (let i = 0, n = agg.length; i < n; ++i) {
      agg[i].add(agg[i].get(t), t);
    }
  },
  rem(t) {
    const key = this.cellkey(t),
      cell = this.cell(key, t);
    cell.num -= 1;
    if (this._countOnly) return;
    if (cell.store) cell.data.rem(t);
    const agg = cell.agg;
    for (let i = 0, n = agg.length; i < n; ++i) {
      agg[i].rem(agg[i].get(t), t);
    }
  },
  celltuple(cell) {
    const tuple = cell.tuple,
      counts = this._counts;

    // consolidate stored values
    if (cell.store) {
      cell.data.values();
    }

    // update tuple properties
    for (let i = 0, n = counts.length; i < n; ++i) {
      tuple[counts[i]] = cell.num;
    }
    if (!this._countOnly) {
      const agg = cell.agg;
      for (let i = 0, n = agg.length; i < n; ++i) {
        agg[i].set(tuple);
      }
    }
    return tuple;
  },
  changes(out) {
    const adds = this._adds,
      mods = this._mods,
      prev = this._prev,
      drop = this._drop,
      add = out.add,
      rem = out.rem,
      mod = out.mod;
    let cell, key, i, n;
    if (prev) for (key in prev) {
      cell = prev[key];
      if (!drop || cell.num) rem.push(cell.tuple);
    }
    for (i = 0, n = this._alen; i < n; ++i) {
      add.push(this.celltuple(adds[i]));
      adds[i] = null; // for garbage collection
    }
    for (i = 0, n = this._mlen; i < n; ++i) {
      cell = mods[i];
      (cell.num === 0 && drop ? rem : mod).push(this.celltuple(cell));
      mods[i] = null; // for garbage collection
    }
    this._alen = this._mlen = 0; // reset list of active cells
    this._prev = null;
    return out;
  }
});

// epsilon bias to offset floating point error (#1737)
const extension_EPSILON$1 = 1e-14;

/**
 * Generates a binning function for discretizing data.
 * @constructor
 * @param {object} params - The parameters for this operator. The
 *   provided values should be valid options for the {@link bin} function.
 * @param {function(object): *} params.field - The data field to bin.
 */
function extension_Bin(params) {
  extension_Transform.call(this, null, params);
}
extension_Bin.Definition = {
  'type': 'Bin',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'field',
    'type': 'field',
    'required': true
  }, {
    'name': 'interval',
    'type': 'boolean',
    'default': true
  }, {
    'name': 'anchor',
    'type': 'number'
  }, {
    'name': 'maxbins',
    'type': 'number',
    'default': 20
  }, {
    'name': 'base',
    'type': 'number',
    'default': 10
  }, {
    'name': 'divide',
    'type': 'number',
    'array': true,
    'default': [5, 2]
  }, {
    'name': 'extent',
    'type': 'number',
    'array': true,
    'length': 2,
    'required': true
  }, {
    'name': 'span',
    'type': 'number'
  }, {
    'name': 'step',
    'type': 'number'
  }, {
    'name': 'steps',
    'type': 'number',
    'array': true
  }, {
    'name': 'minstep',
    'type': 'number',
    'default': 0
  }, {
    'name': 'nice',
    'type': 'boolean',
    'default': true
  }, {
    'name': 'name',
    'type': 'string'
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': 2,
    'default': ['bin0', 'bin1']
  }]
};
extension_inherits(extension_Bin, extension_Transform, {
  transform(_, pulse) {
    const band = _.interval !== false,
      bins = this._bins(_),
      start = bins.start,
      step = bins.step,
      as = _.as || ['bin0', 'bin1'],
      b0 = as[0],
      b1 = as[1];
    let flag;
    if (_.modified()) {
      pulse = pulse.reflow(true);
      flag = pulse.SOURCE;
    } else {
      flag = pulse.modified(extension_accessorFields(_.field)) ? pulse.ADD_MOD : pulse.ADD;
    }
    pulse.visit(flag, band ? t => {
      const v = bins(t);
      // minimum bin value (inclusive)
      t[b0] = v;
      // maximum bin value (exclusive)
      // use convoluted math for better floating point agreement
      // see https://github.com/vega/vega/issues/830
      // infinite values propagate through this formula! #2227
      t[b1] = v == null ? null : start + step * (1 + (v - start) / step);
    } : t => t[b0] = bins(t));
    return pulse.modifies(band ? as : b0);
  },
  _bins(_) {
    if (this.value && !_.modified()) {
      return this.value;
    }
    const field = _.field,
      bins = extension_vega_statistics_module_bin(_),
      step = bins.step;
    let start = bins.start,
      stop = start + Math.ceil((bins.stop - start) / step) * step,
      a,
      d;
    if ((a = _.anchor) != null) {
      d = a - (start + step * Math.floor((a - start) / step));
      start += d;
      stop += d;
    }
    const f = function (t) {
      let v = extension_toNumber(field(t));
      return v == null ? null : v < start ? -Infinity : v > stop ? +Infinity : (v = Math.max(start, Math.min(v, stop - step)), start + step * Math.floor(extension_EPSILON$1 + (v - start) / step));
    };
    f.start = start;
    f.stop = bins.stop;
    f.step = step;
    return this.value = extension_accessor(f, extension_accessorFields(field), _.name || 'bin_' + extension_accessorName(field));
  }
});

function extension_SortedList (idFunc, source, input) {
  const $ = idFunc;
  let data = source || [],
    add = input || [],
    rem = {},
    cnt = 0;
  return {
    add: t => add.push(t),
    remove: t => rem[$(t)] = ++cnt,
    size: () => data.length,
    data: (compare, resort) => {
      if (cnt) {
        data = data.filter(t => !rem[$(t)]);
        rem = {};
        cnt = 0;
      }
      if (resort && compare) {
        data.sort(compare);
      }
      if (add.length) {
        data = compare ? extension_merge(compare, data, add.sort(compare)) : data.concat(add);
        add = [];
      }
      return data;
    }
  };
}

/**
 * Collects all data tuples that pass through this operator.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(*,*): number} [params.sort] - An optional
 *   comparator function for additionally sorting the collected tuples.
 */
function extension_Collect(params) {
  extension_Transform.call(this, [], params);
}
extension_Collect.Definition = {
  'type': 'Collect',
  'metadata': {
    'source': true
  },
  'params': [{
    'name': 'sort',
    'type': 'compare'
  }]
};
extension_inherits(extension_Collect, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.ALL),
      list = extension_SortedList(extension_tupleid, this.value, out.materialize(out.ADD).add),
      sort = _.sort,
      mod = pulse.changed() || sort && (_.modified('sort') || pulse.modified(sort.fields));
    out.visit(out.REM, list.remove);
    this.modified(mod);
    this.value = out.source = list.data(extension_stableCompare(sort), mod);

    // propagate tree root if defined
    if (pulse.source && pulse.source.root) {
      this.value.root = pulse.source.root;
    }
    return out;
  }
});

/**
 * Generates a comparator function.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<string|function>} params.fields - The fields to compare.
 * @param {Array<string>} [params.orders] - The sort orders.
 *   Each entry should be one of "ascending" (default) or "descending".
 */
function extension_Compare(params) {
  extension_Operator.call(this, null, extension_update$5, params);
}
extension_inherits(extension_Compare, extension_Operator);
function extension_update$5(_) {
  return this.value && !_.modified() ? this.value : extension_vega_util_module_compare(_.fields, _.orders);
}

/**
 * Count regexp-defined pattern occurrences in a text field.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - An accessor for the text field.
 * @param {string} [params.pattern] - RegExp string defining the text pattern.
 * @param {string} [params.case] - One of 'lower', 'upper' or null (mixed) case.
 * @param {string} [params.stopwords] - RegExp string of words to ignore.
 */
function extension_CountPattern(params) {
  extension_Transform.call(this, null, params);
}
extension_CountPattern.Definition = {
  'type': 'CountPattern',
  'metadata': {
    'generates': true,
    'changes': true
  },
  'params': [{
    'name': 'field',
    'type': 'field',
    'required': true
  }, {
    'name': 'case',
    'type': 'enum',
    'values': ['upper', 'lower', 'mixed'],
    'default': 'mixed'
  }, {
    'name': 'pattern',
    'type': 'string',
    'default': '[\\w"]+'
  }, {
    'name': 'stopwords',
    'type': 'string',
    'default': ''
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': 2,
    'default': ['text', 'count']
  }]
};
function extension_tokenize(text, tcase, match) {
  switch (tcase) {
    case 'upper':
      text = text.toUpperCase();
      break;
    case 'lower':
      text = text.toLowerCase();
      break;
  }
  return text.match(match);
}
extension_inherits(extension_CountPattern, extension_Transform, {
  transform(_, pulse) {
    const process = update => tuple => {
      var tokens = extension_tokenize(get(tuple), _.case, match) || [],
        t;
      for (var i = 0, n = tokens.length; i < n; ++i) {
        if (!stop.test(t = tokens[i])) update(t);
      }
    };
    const init = this._parameterCheck(_, pulse),
      counts = this._counts,
      match = this._match,
      stop = this._stop,
      get = _.field,
      as = _.as || ['text', 'count'],
      add = process(t => counts[t] = 1 + (counts[t] || 0)),
      rem = process(t => counts[t] -= 1);
    if (init) {
      pulse.visit(pulse.SOURCE, add);
    } else {
      pulse.visit(pulse.ADD, add);
      pulse.visit(pulse.REM, rem);
    }
    return this._finish(pulse, as); // generate output tuples
  },
  _parameterCheck(_, pulse) {
    let init = false;
    if (_.modified('stopwords') || !this._stop) {
      this._stop = new RegExp('^' + (_.stopwords || '') + '$', 'i');
      init = true;
    }
    if (_.modified('pattern') || !this._match) {
      this._match = new RegExp(_.pattern || '[\\w\']+', 'g');
      init = true;
    }
    if (_.modified('field') || pulse.modified(_.field.fields)) {
      init = true;
    }
    if (init) this._counts = {};
    return init;
  },
  _finish(pulse, as) {
    const counts = this._counts,
      tuples = this._tuples || (this._tuples = {}),
      text = as[0],
      count = as[1],
      out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS);
    let w, t, c;
    for (w in counts) {
      t = tuples[w];
      c = counts[w] || 0;
      if (!t && c) {
        tuples[w] = t = extension_ingest$1({});
        t[text] = w;
        t[count] = c;
        out.add.push(t);
      } else if (c === 0) {
        if (t) out.rem.push(t);
        counts[w] = null;
        tuples[w] = null;
      } else if (t[count] !== c) {
        t[count] = c;
        out.mod.push(t);
      }
    }
    return out.modifies(as);
  }
});

/**
 * Perform a cross-product of a tuple stream with itself.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object):boolean} [params.filter] - An optional filter
 *   function for selectively including tuples in the cross product.
 * @param {Array<string>} [params.as] - The names of the output fields.
 */
function extension_Cross(params) {
  extension_Transform.call(this, null, params);
}
extension_Cross.Definition = {
  'type': 'Cross',
  'metadata': {
    'generates': true
  },
  'params': [{
    'name': 'filter',
    'type': 'expr'
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': 2,
    'default': ['a', 'b']
  }]
};
extension_inherits(extension_Cross, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.NO_SOURCE),
      as = _.as || ['a', 'b'],
      a = as[0],
      b = as[1],
      reset = !this.value || pulse.changed(pulse.ADD_REM) || _.modified('as') || _.modified('filter');
    let data = this.value;
    if (reset) {
      if (data) out.rem = data;
      data = pulse.materialize(pulse.SOURCE).source;
      out.add = this.value = extension_cross(data, a, b, _.filter || extension_truthy);
    } else {
      out.mod = data;
    }
    out.source = this.value;
    return out.modifies(as);
  }
});
function extension_cross(input, a, b, filter) {
  var data = [],
    t = {},
    n = input.length,
    i = 0,
    j,
    left;
  for (; i < n; ++i) {
    t[a] = left = input[i];
    for (j = 0; j < n; ++j) {
      t[b] = input[j];
      if (filter(t)) {
        data.push(extension_ingest$1(t));
        t = {};
        t[a] = left;
      }
    }
  }
  return data;
}

const extension_Distributions = {
  kde: extension_kde,
  mixture: extension_mixture,
  normal: extension_gaussian,
  lognormal: extension_lognormal,
  uniform: extension_uniform
};
const extension_DISTRIBUTIONS = 'distributions',
  extension_FUNCTION = 'function',
  extension_FIELD = 'field';

/**
 * Parse a parameter object for a probability distribution.
 * @param {object} def - The distribution parameter object.
 * @param {function():Array<object>} - A method for requesting
 *   source data. Used for distributions (such as KDE) that
 *   require sample data points. This method will only be
 *   invoked if the 'from' parameter for a target data source
 *   is not provided. Typically this method returns backing
 *   source data for a Pulse object.
 * @return {object} - The output distribution object.
 */
function extension_vega_transforms_module_parse(def, data) {
  const func = def[extension_FUNCTION];
  if (!extension_vega_util_module_has(extension_Distributions, func)) {
    extension_vega_util_module_error('Unknown distribution function: ' + func);
  }
  const d = extension_Distributions[func]();
  for (const name in def) {
    // if data field, extract values
    if (name === extension_FIELD) {
      d.data((def.from || data()).map(def[name]));
    }

    // if distribution mixture, recurse to parse each definition
    else if (name === extension_DISTRIBUTIONS) {
      d[name](def[name].map(_ => extension_vega_transforms_module_parse(_, data)));
    }

    // otherwise, simply set the parameter
    else if (typeof d[name] === extension_FUNCTION) {
      d[name](def[name]);
    }
  }
  return d;
}

/**
 * Grid sample points for a probability density. Given a distribution and
 * a sampling extent, will generate points suitable for plotting either
 * PDF (probability density function) or CDF (cumulative distribution
 * function) curves.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {object} params.distribution - The probability distribution. This
 *   is an object parameter dependent on the distribution type.
 * @param {string} [params.method='pdf'] - The distribution method to sample.
 *   One of 'pdf' or 'cdf'.
 * @param {Array<number>} [params.extent] - The [min, max] extent over which
 *   to sample the distribution. This argument is required in most cases, but
 *   can be omitted if the distribution (e.g., 'kde') supports a 'data' method
 *   that returns numerical sample points from which the extent can be deduced.
 * @param {number} [params.minsteps=25] - The minimum number of curve samples
 *   for plotting the density.
 * @param {number} [params.maxsteps=200] - The maximum number of curve samples
 *   for plotting the density.
 * @param {number} [params.steps] - The exact number of curve samples for
 *   plotting the density. If specified, overrides both minsteps and maxsteps
 *   to set an exact number of uniform samples. Useful in conjunction with
 *   a fixed extent to ensure consistent sample points for stacked densities.
 */
function extension_Density(params) {
  extension_Transform.call(this, null, params);
}
const extension_distributions = [{
  'key': {
    'function': 'normal'
  },
  'params': [{
    'name': 'mean',
    'type': 'number',
    'default': 0
  }, {
    'name': 'stdev',
    'type': 'number',
    'default': 1
  }]
}, {
  'key': {
    'function': 'lognormal'
  },
  'params': [{
    'name': 'mean',
    'type': 'number',
    'default': 0
  }, {
    'name': 'stdev',
    'type': 'number',
    'default': 1
  }]
}, {
  'key': {
    'function': 'uniform'
  },
  'params': [{
    'name': 'min',
    'type': 'number',
    'default': 0
  }, {
    'name': 'max',
    'type': 'number',
    'default': 1
  }]
}, {
  'key': {
    'function': 'kde'
  },
  'params': [{
    'name': 'field',
    'type': 'field',
    'required': true
  }, {
    'name': 'from',
    'type': 'data'
  }, {
    'name': 'bandwidth',
    'type': 'number',
    'default': 0
  }]
}];
const extension_vega_transforms_module_mixture = {
  'key': {
    'function': 'mixture'
  },
  'params': [{
    'name': 'distributions',
    'type': 'param',
    'array': true,
    'params': extension_distributions
  }, {
    'name': 'weights',
    'type': 'number',
    'array': true
  }]
};
extension_Density.Definition = {
  'type': 'Density',
  'metadata': {
    'generates': true
  },
  'params': [{
    'name': 'extent',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'steps',
    'type': 'number'
  }, {
    'name': 'minsteps',
    'type': 'number',
    'default': 25
  }, {
    'name': 'maxsteps',
    'type': 'number',
    'default': 200
  }, {
    'name': 'method',
    'type': 'string',
    'default': 'pdf',
    'values': ['pdf', 'cdf']
  }, {
    'name': 'distribution',
    'type': 'param',
    'params': extension_distributions.concat(extension_vega_transforms_module_mixture)
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'default': ['value', 'density']
  }]
};
extension_inherits(extension_Density, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS);
    if (!this.value || pulse.changed() || _.modified()) {
      const dist = extension_vega_transforms_module_parse(_.distribution, extension_vega_transforms_module_source(pulse)),
        minsteps = _.steps || _.minsteps || 25,
        maxsteps = _.steps || _.maxsteps || 200;
      let method = _.method || 'pdf';
      if (method !== 'pdf' && method !== 'cdf') {
        extension_vega_util_module_error('Invalid density method: ' + method);
      }
      if (!_.extent && !dist.data) {
        extension_vega_util_module_error('Missing density extent parameter.');
      }
      method = dist[method];
      const as = _.as || ['value', 'density'],
        domain = _.extent || extension_extent(dist.data()),
        values = extension_sampleCurve(method, domain, minsteps, maxsteps).map(v => {
          const tuple = {};
          tuple[as[0]] = v[0];
          tuple[as[1]] = v[1];
          return extension_ingest$1(tuple);
        });
      if (this.value) out.rem = this.value;
      this.value = out.add = out.source = values;
    }
    return out;
  }
});
function extension_vega_transforms_module_source(pulse) {
  return () => pulse.materialize(pulse.SOURCE).source;
}

// use either provided alias or accessor field name
function extension_fieldNames(fields, as) {
  if (!fields) return null;
  return fields.map((f, i) => as[i] || extension_accessorName(f));
}
function extension_partition$1(data, groupby, field) {
  const groups = [],
    get = f => f(t);
  let map, i, n, t, k, g;

  // partition data points into groups
  if (groupby == null) {
    groups.push(data.map(field));
  } else {
    for (map = {}, i = 0, n = data.length; i < n; ++i) {
      t = data[i];
      k = groupby.map(get);
      g = map[k];
      if (!g) {
        map[k] = g = [];
        g.dims = k;
        groups.push(g);
      }
      g.push(field(t));
    }
  }
  return groups;
}

const extension_Output = 'bin';

/**
 * Dot density binning for dot plot construction.
 * Based on Leland Wilkinson, Dot Plots, The American Statistician, 1999.
 * https://www.cs.uic.edu/~wilkinson/Publications/dotplots.pdf
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The value field to bin.
 * @param {Array<function(object): *>} [params.groupby] - An array of accessors to groupby.
 * @param {number} [params.step] - The step size (bin width) within which dots should be
 *   stacked. Defaults to 1/30 of the extent of the data *field*.
 * @param {boolean} [params.smooth=false] - A boolean flag indicating if dot density
 *   stacks should be smoothed to reduce variance.
 */
function extension_DotBin(params) {
  extension_Transform.call(this, null, params);
}
extension_DotBin.Definition = {
  'type': 'DotBin',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'field',
    'type': 'field',
    'required': true
  }, {
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'step',
    'type': 'number'
  }, {
    'name': 'smooth',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'as',
    'type': 'string',
    'default': extension_Output
  }]
};
const extension_autostep = (data, field) => extension_span(extension_extent(data, field)) / 30;
extension_inherits(extension_DotBin, extension_Transform, {
  transform(_, pulse) {
    if (this.value && !(_.modified() || pulse.changed())) {
      return pulse; // early exit
    }
    const source = pulse.materialize(pulse.SOURCE).source,
      groups = extension_partition$1(pulse.source, _.groupby, extension_vega_util_module_identity),
      smooth = _.smooth || false,
      field = _.field,
      step = _.step || extension_autostep(source, field),
      sort = extension_stableCompare((a, b) => field(a) - field(b)),
      as = _.as || extension_Output,
      n = groups.length;

    // compute dotplot bins per group
    let min = Infinity,
      max = -Infinity,
      i = 0,
      j;
    for (; i < n; ++i) {
      const g = groups[i].sort(sort);
      j = -1;
      for (const v of extension_dotbin(g, step, smooth, field)) {
        if (v < min) min = v;
        if (v > max) max = v;
        g[++j][as] = v;
      }
    }
    this.value = {
      start: min,
      stop: max,
      step: step
    };
    return pulse.reflow(true).modifies(as);
  }
});

/**
 * Wraps an expression function with access to external parameters.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function} params.expr - The expression function. The
 *  function should accept both a datum and a parameter object.
 *  This operator's value will be a new function that wraps the
 *  expression function with access to this operator's parameters.
 */
function extension_Expression(params) {
  extension_Operator.call(this, null, extension_update$4, params);
  this.modified(true);
}
extension_inherits(extension_Expression, extension_Operator);
function extension_update$4(_) {
  const expr = _.expr;
  return this.value && !_.modified('expr') ? this.value : extension_accessor(datum => expr(datum, _), extension_accessorFields(expr), extension_accessorName(expr));
}

/**
 * Computes extents (min/max) for a data field.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The field over which to compute extends.
 */
function extension_Extent(params) {
  extension_Transform.call(this, [undefined, undefined], params);
}
extension_Extent.Definition = {
  'type': 'Extent',
  'metadata': {},
  'params': [{
    'name': 'field',
    'type': 'field',
    'required': true
  }]
};
extension_inherits(extension_Extent, extension_Transform, {
  transform(_, pulse) {
    const extent = this.value,
      field = _.field,
      mod = pulse.changed() || pulse.modified(field.fields) || _.modified('field');
    let min = extent[0],
      max = extent[1];
    if (mod || min == null) {
      min = +Infinity;
      max = -Infinity;
    }
    pulse.visit(mod ? pulse.SOURCE : pulse.ADD, t => {
      const v = extension_toNumber(field(t));
      if (v != null) {
        // NaNs will fail all comparisons!
        if (v < min) min = v;
        if (v > max) max = v;
      }
    });
    if (!Number.isFinite(min) || !Number.isFinite(max)) {
      let name = extension_accessorName(field);
      if (name) name = ` for field "${name}"`;
      pulse.dataflow.warn(`Infinite extent${name}: [${min}, ${max}]`);
      min = max = undefined;
    }
    this.value = [min, max];
  }
});

/**
 * Provides a bridge between a parent transform and a target subflow that
 * consumes only a subset of the tuples that pass through the parent.
 * @constructor
 * @param {Pulse} pulse - A pulse to use as the value of this operator.
 * @param {Transform} parent - The parent transform (typically a Facet instance).
 */
function extension_Subflow(pulse, parent) {
  extension_Operator.call(this, pulse);
  this.parent = parent;
  this.count = 0;
}
extension_inherits(extension_Subflow, extension_Operator, {
  /**
   * Routes pulses from this subflow to a target transform.
   * @param {Transform} target - A transform that receives the subflow of tuples.
   */
  connect(target) {
    this.detachSubflow = target.detachSubflow;
    this.targets().add(target);
    return target.source = this;
  },
  /**
   * Add an 'add' tuple to the subflow pulse.
   * @param {Tuple} t - The tuple being added.
   */
  add(t) {
    this.count += 1;
    this.value.add.push(t);
  },
  /**
   * Add a 'rem' tuple to the subflow pulse.
   * @param {Tuple} t - The tuple being removed.
   */
  rem(t) {
    this.count -= 1;
    this.value.rem.push(t);
  },
  /**
   * Add a 'mod' tuple to the subflow pulse.
   * @param {Tuple} t - The tuple being modified.
   */
  mod(t) {
    this.value.mod.push(t);
  },
  /**
   * Re-initialize this operator's pulse value.
   * @param {Pulse} pulse - The pulse to copy from.
   * @see Pulse.init
   */
  init(pulse) {
    this.value.init(pulse, pulse.NO_SOURCE);
  },
  /**
   * Evaluate this operator. This method overrides the
   * default behavior to simply return the contained pulse value.
   * @return {Pulse}
   */
  evaluate() {
    // assert: this.value.stamp === pulse.stamp
    return this.value;
  }
});

/**
 * Facets a dataflow into a set of subflows based on a key.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(Dataflow, string): Operator} params.subflow - A function
 *   that generates a subflow of operators and returns its root operator.
 * @param {function(object): *} params.key - The key field to facet by.
 */
function extension_Facet(params) {
  extension_Transform.call(this, {}, params);
  this._keys = extension_fastmap(); // cache previously calculated key values

  // keep track of active subflows, use as targets array for listeners
  // this allows us to limit propagation to only updated subflows
  const a = this._targets = [];
  a.active = 0;
  a.forEach = f => {
    for (let i = 0, n = a.active; i < n; ++i) {
      f(a[i], i, a);
    }
  };
}
extension_inherits(extension_Facet, extension_Transform, {
  activate(flow) {
    this._targets[this._targets.active++] = flow;
  },
  // parent argument provided by PreFacet subclass
  subflow(key, flow, pulse, parent) {
    const flows = this.value;
    let sf = extension_vega_util_module_has(flows, key) && flows[key],
      df,
      p;
    if (!sf) {
      p = parent || (p = this._group[key]) && p.tuple;
      df = pulse.dataflow;
      sf = new extension_Subflow(pulse.fork(pulse.NO_SOURCE), this);
      df.add(sf).connect(flow(df, key, p));
      flows[key] = sf;
      this.activate(sf);
    } else if (sf.value.stamp < pulse.stamp) {
      sf.init(pulse);
      this.activate(sf);
    }
    return sf;
  },
  clean() {
    const flows = this.value;
    let detached = 0;
    for (const key in flows) {
      if (flows[key].count === 0) {
        const detach = flows[key].detachSubflow;
        if (detach) detach();
        delete flows[key];
        ++detached;
      }
    }

    // remove inactive targets from the active targets array
    if (detached) {
      const active = this._targets.filter(sf => sf && sf.count > 0);
      this.initTargets(active);
    }
  },
  initTargets(act) {
    const a = this._targets,
      n = a.length,
      m = act ? act.length : 0;
    let i = 0;
    for (; i < m; ++i) {
      a[i] = act[i];
    }
    for (; i < n && a[i] != null; ++i) {
      a[i] = null; // ensure old flows can be garbage collected
    }
    a.active = m;
  },
  transform(_, pulse) {
    const df = pulse.dataflow,
      key = _.key,
      flow = _.subflow,
      cache = this._keys,
      rekey = _.modified('key'),
      subflow = key => this.subflow(key, flow, pulse);
    this._group = _.group || {};
    this.initTargets(); // reset list of active subflows

    pulse.visit(pulse.REM, t => {
      const id = extension_tupleid(t),
        k = cache.get(id);
      if (k !== undefined) {
        cache.delete(id);
        subflow(k).rem(t);
      }
    });
    pulse.visit(pulse.ADD, t => {
      const k = key(t);
      cache.set(extension_tupleid(t), k);
      subflow(k).add(t);
    });
    if (rekey || pulse.modified(key.fields)) {
      pulse.visit(pulse.MOD, t => {
        const id = extension_tupleid(t),
          k0 = cache.get(id),
          k1 = key(t);
        if (k0 === k1) {
          subflow(k1).mod(t);
        } else {
          cache.set(id, k1);
          subflow(k0).rem(t);
          subflow(k1).add(t);
        }
      });
    } else if (pulse.changed(pulse.MOD)) {
      pulse.visit(pulse.MOD, t => {
        subflow(cache.get(extension_tupleid(t))).mod(t);
      });
    }
    if (rekey) {
      pulse.visit(pulse.REFLOW, t => {
        const id = extension_tupleid(t),
          k0 = cache.get(id),
          k1 = key(t);
        if (k0 !== k1) {
          cache.set(id, k1);
          subflow(k0).rem(t);
          subflow(k1).add(t);
        }
      });
    }
    if (pulse.clean()) {
      df.runAfter(() => {
        this.clean();
        cache.clean();
      });
    } else if (cache.empty > df.cleanThreshold) {
      df.runAfter(cache.clean);
    }
    return pulse;
  }
});

/**
 * Generates one or more field accessor functions.
 * If the 'name' parameter is an array, an array of field accessors
 * will be created and the 'as' parameter will be ignored.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {string} params.name - The field name(s) to access.
 * @param {string} params.as - The accessor function name.
 */
function extension_vega_transforms_module_Field(params) {
  extension_Operator.call(this, null, extension_update$3, params);
}
extension_inherits(extension_vega_transforms_module_Field, extension_Operator);
function extension_update$3(_) {
  return this.value && !_.modified() ? this.value : extension_vega_util_module_isArray(_.name) ? extension_vega_util_module_array(_.name).map(f => extension_vega_util_module_field(f)) : extension_vega_util_module_field(_.name, _.as);
}

/**
 * Filters data tuples according to a predicate function.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.expr - The predicate expression function
 *   that determines a tuple's filter status. Truthy values pass the filter.
 */
function extension_Filter(params) {
  extension_Transform.call(this, extension_fastmap(), params);
}
extension_Filter.Definition = {
  'type': 'Filter',
  'metadata': {
    'changes': true
  },
  'params': [{
    'name': 'expr',
    'type': 'expr',
    'required': true
  }]
};
extension_inherits(extension_Filter, extension_Transform, {
  transform(_, pulse) {
    const df = pulse.dataflow,
      cache = this.value,
      // cache ids of filtered tuples
      output = pulse.fork(),
      add = output.add,
      rem = output.rem,
      mod = output.mod,
      test = _.expr;
    let isMod = true;
    pulse.visit(pulse.REM, t => {
      const id = extension_tupleid(t);
      if (!cache.has(id)) rem.push(t);else cache.delete(id);
    });
    pulse.visit(pulse.ADD, t => {
      if (test(t, _)) add.push(t);else cache.set(extension_tupleid(t), 1);
    });
    function revisit(t) {
      const id = extension_tupleid(t),
        b = test(t, _),
        s = cache.get(id);
      if (b && s) {
        cache.delete(id);
        add.push(t);
      } else if (!b && !s) {
        cache.set(id, 1);
        rem.push(t);
      } else if (isMod && b && !s) {
        mod.push(t);
      }
    }
    pulse.visit(pulse.MOD, revisit);
    if (_.modified()) {
      isMod = false;
      pulse.visit(pulse.REFLOW, revisit);
    }
    if (cache.empty > df.cleanThreshold) df.runAfter(cache.clean);
    return output;
  }
});

/**
 * Flattens array-typed field values into new data objects.
 * If multiple fields are specified, they are treated as parallel arrays,
 * with output values included for each matching index (or null if missing).
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<function(object): *>} params.fields - An array of field
 *   accessors for the tuple fields that should be flattened.
 * @param {string} [params.index] - Optional output field name for index
 *   value. If unspecified, no index field is included in the output.
 * @param {Array<string>} [params.as] - Output field names for flattened
 *   array fields. Any unspecified fields will use the field name provided
 *   by the fields accessors.
 */
function extension_Flatten(params) {
  extension_Transform.call(this, [], params);
}
extension_Flatten.Definition = {
  'type': 'Flatten',
  'metadata': {
    'generates': true
  },
  'params': [{
    'name': 'fields',
    'type': 'field',
    'array': true,
    'required': true
  }, {
    'name': 'index',
    'type': 'string'
  }, {
    'name': 'as',
    'type': 'string',
    'array': true
  }]
};
extension_inherits(extension_Flatten, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.NO_SOURCE),
      fields = _.fields,
      as = extension_fieldNames(fields, _.as || []),
      index = _.index || null,
      m = as.length;

    // remove any previous results
    out.rem = this.value;

    // generate flattened tuples
    pulse.visit(pulse.SOURCE, t => {
      const arrays = fields.map(f => f(t)),
        maxlen = arrays.reduce((l, a) => Math.max(l, a.length), 0);
      let i = 0,
        j,
        d,
        v;
      for (; i < maxlen; ++i) {
        d = extension_vega_dataflow_module_derive(t);
        for (j = 0; j < m; ++j) {
          d[as[j]] = (v = arrays[j][i]) == null ? null : v;
        }
        if (index) {
          d[index] = i;
        }
        out.add.push(d);
      }
    });
    this.value = out.source = out.add;
    if (index) out.modifies(index);
    return out.modifies(as);
  }
});

/**
 * Folds one more tuple fields into multiple tuples in which the field
 * name and values are available under new 'key' and 'value' fields.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.fields - An array of field accessors
 *   for the tuple fields that should be folded.
 * @param {Array<string>} [params.as] - Output field names for folded key
 *   and value fields, defaults to ['key', 'value'].
 */
function extension_Fold(params) {
  extension_Transform.call(this, [], params);
}
extension_Fold.Definition = {
  'type': 'Fold',
  'metadata': {
    'generates': true
  },
  'params': [{
    'name': 'fields',
    'type': 'field',
    'array': true,
    'required': true
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': 2,
    'default': ['key', 'value']
  }]
};
extension_inherits(extension_Fold, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.NO_SOURCE),
      fields = _.fields,
      fnames = fields.map(extension_accessorName),
      as = _.as || ['key', 'value'],
      k = as[0],
      v = as[1],
      n = fields.length;
    out.rem = this.value;
    pulse.visit(pulse.SOURCE, t => {
      for (let i = 0, d; i < n; ++i) {
        d = extension_vega_dataflow_module_derive(t);
        d[k] = fnames[i];
        d[v] = fields[i](t);
        out.add.push(d);
      }
    });
    this.value = out.source = out.add;
    return out.modifies(as);
  }
});

/**
 * Invokes a function for each data tuple and saves the results as a new field.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.expr - The formula function to invoke for each tuple.
 * @param {string} params.as - The field name under which to save the result.
 * @param {boolean} [params.initonly=false] - If true, the formula is applied to
 *   added tuples only, and does not update in response to modifications.
 */
function extension_Formula(params) {
  extension_Transform.call(this, null, params);
}
extension_Formula.Definition = {
  'type': 'Formula',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'expr',
    'type': 'expr',
    'required': true
  }, {
    'name': 'as',
    'type': 'string',
    'required': true
  }, {
    'name': 'initonly',
    'type': 'boolean'
  }]
};
extension_inherits(extension_Formula, extension_Transform, {
  transform(_, pulse) {
    const func = _.expr,
      as = _.as,
      mod = _.modified(),
      flag = _.initonly ? pulse.ADD : mod ? pulse.SOURCE : pulse.modified(func.fields) || pulse.modified(as) ? pulse.ADD_MOD : pulse.ADD;
    if (mod) {
      // parameters updated, need to reflow
      pulse = pulse.materialize().reflow(true);
    }
    if (!_.initonly) {
      pulse.modifies(as);
    }
    return pulse.visit(flag, t => t[as] = func(t, _));
  }
});

/**
 * Generates data tuples using a provided generator function.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(Parameters): object} params.generator - A tuple generator
 *   function. This function is given the operator parameters as input.
 *   Changes to any additional parameters will not trigger re-calculation
 *   of previously generated tuples. Only future tuples are affected.
 * @param {number} params.size - The number of tuples to produce.
 */
function extension_Generate(params) {
  extension_Transform.call(this, [], params);
}
extension_inherits(extension_Generate, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.ALL),
      gen = _.generator;
    let data = this.value,
      num = _.size - data.length,
      add,
      rem,
      t;
    if (num > 0) {
      // need more tuples, generate and add
      for (add = []; --num >= 0;) {
        add.push(t = extension_ingest$1(gen(_)));
        data.push(t);
      }
      out.add = out.add.length ? out.materialize(out.ADD).add.concat(add) : add;
    } else {
      // need fewer tuples, remove
      rem = data.slice(0, -num);
      out.rem = out.rem.length ? out.materialize(out.REM).rem.concat(rem) : rem;
      data = data.slice(-num);
    }
    out.source = this.value = data;
    return out;
  }
});

const extension_vega_transforms_module_Methods = {
  value: 'value',
  median: extension_median,
  mean: extension_mean,
  min: extension_min_min,
  max: extension_max_max
};
const extension_Empty = [];

/**
 * Impute missing values.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The value field to impute.
 * @param {Array<function(object): *>} [params.groupby] - An array of
 *   accessors to determine series within which to perform imputation.
 * @param {function(object): *} params.key - An accessor for a key value.
 *   Each key value should be unique within a group. New tuples will be
 *   imputed for any key values that are not found within a group.
 * @param {Array<*>} [params.keyvals] - Optional array of required key
 *   values. New tuples will be imputed for any key values that are not
 *   found within a group. In addition, these values will be automatically
 *   augmented with the key values observed in the input data.
 * @param {string} [method='value'] - The imputation method to use. One of
 *   'value', 'mean', 'median', 'max', 'min'.
 * @param {*} [value=0] - The constant value to use for imputation
 *   when using method 'value'.
 */
function extension_Impute(params) {
  extension_Transform.call(this, [], params);
}
extension_Impute.Definition = {
  'type': 'Impute',
  'metadata': {
    'changes': true
  },
  'params': [{
    'name': 'field',
    'type': 'field',
    'required': true
  }, {
    'name': 'key',
    'type': 'field',
    'required': true
  }, {
    'name': 'keyvals',
    'array': true
  }, {
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'method',
    'type': 'enum',
    'default': 'value',
    'values': ['value', 'mean', 'median', 'max', 'min']
  }, {
    'name': 'value',
    'default': 0
  }]
};
function extension_getValue(_) {
  var m = _.method || extension_vega_transforms_module_Methods.value,
    v;
  if (extension_vega_transforms_module_Methods[m] == null) {
    extension_vega_util_module_error('Unrecognized imputation method: ' + m);
  } else if (m === extension_vega_transforms_module_Methods.value) {
    v = _.value !== undefined ? _.value : 0;
    return () => v;
  } else {
    return extension_vega_transforms_module_Methods[m];
  }
}
function extension_getField(_) {
  const f = _.field;
  return t => t ? f(t) : NaN;
}
extension_inherits(extension_Impute, extension_Transform, {
  transform(_, pulse) {
    var out = pulse.fork(pulse.ALL),
      impute = extension_getValue(_),
      field = extension_getField(_),
      fName = extension_accessorName(_.field),
      kName = extension_accessorName(_.key),
      gNames = (_.groupby || []).map(extension_accessorName),
      groups = extension_partition(pulse.source, _.groupby, _.key, _.keyvals),
      curr = [],
      prev = this.value,
      m = groups.domain.length,
      group,
      value,
      gVals,
      kVal,
      g,
      i,
      j,
      l,
      n,
      t;
    for (g = 0, l = groups.length; g < l; ++g) {
      group = groups[g];
      gVals = group.values;
      value = NaN;

      // add tuples for missing values
      for (j = 0; j < m; ++j) {
        if (group[j] != null) continue;
        kVal = groups.domain[j];
        t = {
          _impute: true
        };
        for (i = 0, n = gVals.length; i < n; ++i) t[gNames[i]] = gVals[i];
        t[kName] = kVal;
        t[fName] = Number.isNaN(value) ? value = impute(group, field) : value;
        curr.push(extension_ingest$1(t));
      }
    }

    // update pulse with imputed tuples
    if (curr.length) out.add = out.materialize(out.ADD).add.concat(curr);
    if (prev.length) out.rem = out.materialize(out.REM).rem.concat(prev);
    this.value = curr;
    return out;
  }
});
function extension_partition(data, groupby, key, keyvals) {
  var get = f => f(t),
    groups = [],
    domain = keyvals ? keyvals.slice() : [],
    kMap = {},
    gMap = {},
    gVals,
    gKey,
    group,
    i,
    j,
    k,
    n,
    t;
  domain.forEach((k, i) => kMap[k] = i + 1);
  for (i = 0, n = data.length; i < n; ++i) {
    t = data[i];
    k = key(t);
    j = kMap[k] || (kMap[k] = domain.push(k));
    gKey = (gVals = groupby ? groupby.map(get) : extension_Empty) + '';
    if (!(group = gMap[gKey])) {
      group = gMap[gKey] = [];
      groups.push(group);
      group.values = gVals;
    }
    group[j - 1] = t;
  }
  groups.domain = domain;
  return groups;
}

/**
 * Extend input tuples with aggregate values.
 * Calcuates aggregate values and joins them with the input stream.
 * @constructor
 */
function extension_JoinAggregate(params) {
  extension_Aggregate.call(this, params);
}
extension_JoinAggregate.Definition = {
  'type': 'JoinAggregate',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'fields',
    'type': 'field',
    'null': true,
    'array': true
  }, {
    'name': 'ops',
    'type': 'enum',
    'array': true,
    'values': extension_ValidAggregateOps
  }, {
    'name': 'as',
    'type': 'string',
    'null': true,
    'array': true
  }, {
    'name': 'key',
    'type': 'field'
  }]
};
extension_inherits(extension_JoinAggregate, extension_Aggregate, {
  transform(_, pulse) {
    const aggr = this,
      mod = _.modified();
    let cells;

    // process all input tuples to calculate aggregates
    if (aggr.value && (mod || pulse.modified(aggr._inputs, true))) {
      cells = aggr.value = mod ? aggr.init(_) : {};
      pulse.visit(pulse.SOURCE, t => aggr.add(t));
    } else {
      cells = aggr.value = aggr.value || this.init(_);
      pulse.visit(pulse.REM, t => aggr.rem(t));
      pulse.visit(pulse.ADD, t => aggr.add(t));
    }

    // update aggregation cells
    aggr.changes();

    // write aggregate values to input tuples
    pulse.visit(pulse.SOURCE, t => {
      extension_extend(t, cells[aggr.cellkey(t)].tuple);
    });
    return pulse.reflow(mod).modifies(this._outputs);
  },
  changes() {
    const adds = this._adds,
      mods = this._mods;
    let i, n;
    for (i = 0, n = this._alen; i < n; ++i) {
      this.celltuple(adds[i]);
      adds[i] = null; // for garbage collection
    }
    for (i = 0, n = this._mlen; i < n; ++i) {
      this.celltuple(mods[i]);
      mods[i] = null; // for garbage collection
    }
    this._alen = this._mlen = 0; // reset list of active cells
  }
});

/**
 * Compute kernel density estimates (KDE) for one or more data groups.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<function(object): *>} [params.groupby] - An array of accessors
 *   to groupby.
 * @param {function(object): *} params.field - An accessor for the data field
 *   to estimate.
 * @param {number} [params.bandwidth=0] - The KDE kernel bandwidth.
 *   If zero or unspecified, the bandwidth is automatically determined.
 * @param {boolean} [params.counts=false] - A boolean flag indicating if the
 *   output values should be probability estimates (false, default) or
 *   smoothed counts (true).
 * @param {string} [params.cumulative=false] - A boolean flag indicating if a
 *   density (false) or cumulative distribution (true) should be generated.
 * @param {Array<number>} [params.extent] - The domain extent over which to
 *   plot the density. If unspecified, the [min, max] data extent is used.
 * @param {string} [params.resolve='independent'] - Indicates how parameters for
 *   multiple densities should be resolved. If "independent" (the default), each
 *   density may have its own domain extent and dynamic number of curve sample
 *   steps. If "shared", the KDE transform will ensure that all densities are
 *   defined over a shared domain and curve steps, enabling stacking.
 * @param {number} [params.minsteps=25] - The minimum number of curve samples
 *   for plotting the density.
 * @param {number} [params.maxsteps=200] - The maximum number of curve samples
 *   for plotting the density.
 * @param {number} [params.steps] - The exact number of curve samples for
 *   plotting the density. If specified, overrides both minsteps and maxsteps
 *   to set an exact number of uniform samples. Useful in conjunction with
 *   a fixed extent to ensure consistent sample points for stacked densities.
 */
function extension_KDE(params) {
  extension_Transform.call(this, null, params);
}
extension_KDE.Definition = {
  'type': 'KDE',
  'metadata': {
    'generates': true
  },
  'params': [{
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'field',
    'type': 'field',
    'required': true
  }, {
    'name': 'cumulative',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'counts',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'bandwidth',
    'type': 'number',
    'default': 0
  }, {
    'name': 'extent',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'resolve',
    'type': 'enum',
    'values': ['shared', 'independent'],
    'default': 'independent'
  }, {
    'name': 'steps',
    'type': 'number'
  }, {
    'name': 'minsteps',
    'type': 'number',
    'default': 25
  }, {
    'name': 'maxsteps',
    'type': 'number',
    'default': 200
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'default': ['value', 'density']
  }]
};
extension_inherits(extension_KDE, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS);
    if (!this.value || pulse.changed() || _.modified()) {
      const source = pulse.materialize(pulse.SOURCE).source,
        groups = extension_partition$1(source, _.groupby, _.field),
        names = (_.groupby || []).map(extension_accessorName),
        bandwidth = _.bandwidth,
        method = _.cumulative ? 'cdf' : 'pdf',
        as = _.as || ['value', 'density'],
        values = [];
      let domain = _.extent,
        minsteps = _.steps || _.minsteps || 25,
        maxsteps = _.steps || _.maxsteps || 200;
      if (method !== 'pdf' && method !== 'cdf') {
        extension_vega_util_module_error('Invalid density method: ' + method);
      }
      if (_.resolve === 'shared') {
        if (!domain) domain = extension_extent(source, _.field);
        minsteps = maxsteps = _.steps || maxsteps;
      }
      groups.forEach(g => {
        const density = extension_kde(g, bandwidth)[method],
          scale = _.counts ? g.length : 1,
          local = domain || extension_extent(g);
        extension_sampleCurve(density, local, minsteps, maxsteps).forEach(v => {
          const t = {};
          for (let i = 0; i < names.length; ++i) {
            t[names[i]] = g.dims[i];
          }
          t[as[0]] = v[0];
          t[as[1]] = v[1] * scale;
          values.push(extension_ingest$1(t));
        });
      });
      if (this.value) out.rem = this.value;
      this.value = out.add = out.source = values;
    }
    return out;
  }
});

/**
 * Generates a key function.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<string>} params.fields - The field name(s) for the key function.
 * @param {boolean} params.flat - A boolean flag indicating if the field names
 *  should be treated as flat property names, side-stepping nested field
 *  lookups normally indicated by dot or bracket notation.
 */
function extension_Key(params) {
  extension_Operator.call(this, null, extension_update$2, params);
}
extension_inherits(extension_Key, extension_Operator);
function extension_update$2(_) {
  return this.value && !_.modified() ? this.value : extension_vega_util_module_key(_.fields, _.flat);
}

/**
 * Load and parse data from an external source. Marshalls parameter
 * values and then invokes the Dataflow request method.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {string} params.url - The URL to load from.
 * @param {object} params.format - The data format options.
 */
function extension_Load(params) {
  extension_Transform.call(this, [], params);
  this._pending = null;
}
extension_inherits(extension_Load, extension_Transform, {
  transform(_, pulse) {
    const df = pulse.dataflow;
    if (this._pending) {
      // update state and return pulse
      return extension_vega_transforms_module_output(this, pulse, this._pending);
    }
    if (extension_stop(_)) return pulse.StopPropagation;
    if (_.values) {
      // parse and ingest values, return output pulse
      return extension_vega_transforms_module_output(this, pulse, df.parse(_.values, _.format));
    } else if (_.async) {
      // return promise for non-blocking async loading
      const p = df.request(_.url, _.format).then(res => {
        this._pending = extension_vega_util_module_array(res.data);
        return df => df.touch(this);
      });
      return {
        async: p
      };
    } else {
      // return promise for synchronous loading
      return df.request(_.url, _.format).then(res => extension_vega_transforms_module_output(this, pulse, extension_vega_util_module_array(res.data)));
    }
  }
});
function extension_stop(_) {
  return _.modified('async') && !(_.modified('values') || _.modified('url') || _.modified('format'));
}
function extension_vega_transforms_module_output(op, pulse, data) {
  data.forEach(extension_ingest$1);
  const out = pulse.fork(pulse.NO_FIELDS & pulse.NO_SOURCE);
  out.rem = op.value;
  op.value = out.source = out.add = data;
  op._pending = null;
  if (out.rem.length) out.clean(true);
  return out;
}

/**
 * Extend tuples by joining them with values from a lookup table.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Map} params.index - The lookup table map.
 * @param {Array<function(object): *} params.fields - The fields to lookup.
 * @param {Array<string>} params.as - Output field names for each lookup value.
 * @param {*} [params.default] - A default value to use if lookup fails.
 */
function extension_Lookup(params) {
  extension_Transform.call(this, {}, params);
}
extension_Lookup.Definition = {
  'type': 'Lookup',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'index',
    'type': 'index',
    'params': [{
      'name': 'from',
      'type': 'data',
      'required': true
    }, {
      'name': 'key',
      'type': 'field',
      'required': true
    }]
  }, {
    'name': 'values',
    'type': 'field',
    'array': true
  }, {
    'name': 'fields',
    'type': 'field',
    'array': true,
    'required': true
  }, {
    'name': 'as',
    'type': 'string',
    'array': true
  }, {
    'name': 'default',
    'default': null
  }]
};
extension_inherits(extension_Lookup, extension_Transform, {
  transform(_, pulse) {
    const keys = _.fields,
      index = _.index,
      values = _.values,
      defaultValue = _.default == null ? null : _.default,
      reset = _.modified(),
      n = keys.length;
    let flag = reset ? pulse.SOURCE : pulse.ADD,
      out = pulse,
      as = _.as,
      set,
      m,
      mods;
    if (values) {
      m = values.length;
      if (n > 1 && !as) {
        extension_vega_util_module_error('Multi-field lookup requires explicit "as" parameter.');
      }
      if (as && as.length !== n * m) {
        extension_vega_util_module_error('The "as" parameter has too few output field names.');
      }
      as = as || values.map(extension_accessorName);
      set = function (t) {
        for (var i = 0, k = 0, j, v; i < n; ++i) {
          v = index.get(keys[i](t));
          if (v == null) for (j = 0; j < m; ++j, ++k) t[as[k]] = defaultValue;else for (j = 0; j < m; ++j, ++k) t[as[k]] = values[j](v);
        }
      };
    } else {
      if (!as) {
        extension_vega_util_module_error('Missing output field names.');
      }
      set = function (t) {
        for (var i = 0, v; i < n; ++i) {
          v = index.get(keys[i](t));
          t[as[i]] = v == null ? defaultValue : v;
        }
      };
    }
    if (reset) {
      out = pulse.reflow(true);
    } else {
      mods = keys.some(k => pulse.modified(k.fields));
      flag |= mods ? pulse.MOD : 0;
    }
    pulse.visit(flag, set);
    return out.modifies(as);
  }
});

/**
 * Computes global min/max extents over a collection of extents.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<Array<number>>} params.extents - The input extents.
 */
function extension_MultiExtent(params) {
  extension_Operator.call(this, null, extension_update$1, params);
}
extension_inherits(extension_MultiExtent, extension_Operator);
function extension_update$1(_) {
  if (this.value && !_.modified()) {
    return this.value;
  }
  const ext = _.extents,
    n = ext.length;
  let min = +Infinity,
    max = -Infinity,
    i,
    e;
  for (i = 0; i < n; ++i) {
    e = ext[i];
    if (e[0] < min) min = e[0];
    if (e[1] > max) max = e[1];
  }
  return [min, max];
}

/**
 * Merge a collection of value arrays.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<Array<*>>} params.values - The input value arrrays.
 */
function extension_MultiValues(params) {
  extension_Operator.call(this, null, extension_vega_transforms_module_update, params);
}
extension_inherits(extension_MultiValues, extension_Operator);
function extension_vega_transforms_module_update(_) {
  return this.value && !_.modified() ? this.value : _.values.reduce((data, _) => data.concat(_), []);
}

/**
 * Operator whose value is simply its parameter hash. This operator is
 * useful for enabling reactive updates to values of nested objects.
 * @constructor
 * @param {object} params - The parameters for this operator.
 */
function extension_Params(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_Params, extension_Transform, {
  transform(_, pulse) {
    this.modified(_.modified());
    this.value = _;
    return pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS); // do not pass tuples
  }
});

/**
 * Aggregate and pivot selected field values to become new fields.
 * This operator is useful to construction cross-tabulations.
 * @constructor
 * @param {Array<function(object): *>} [params.groupby] - An array of accessors
 *  to groupby. These fields act just like groupby fields of an Aggregate transform.
 * @param {function(object): *} params.field - The field to pivot on. The unique
 *  values of this field become new field names in the output stream.
 * @param {function(object): *} params.value - The field to populate pivoted fields.
 *  The aggregate values of this field become the values of the new pivoted fields.
 * @param {string} [params.op] - The aggregation operation for the value field,
 *  applied per cell in the output stream. The default is "sum".
 * @param {number} [params.limit] - An optional parameter indicating the maximum
 *  number of pivoted fields to generate. The pivoted field names are sorted in
 *  ascending order prior to enforcing the limit.
 */
function extension_Pivot(params) {
  extension_Aggregate.call(this, params);
}
extension_Pivot.Definition = {
  'type': 'Pivot',
  'metadata': {
    'generates': true,
    'changes': true
  },
  'params': [{
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'field',
    'type': 'field',
    'required': true
  }, {
    'name': 'value',
    'type': 'field',
    'required': true
  }, {
    'name': 'op',
    'type': 'enum',
    'values': extension_ValidAggregateOps,
    'default': 'sum'
  }, {
    'name': 'limit',
    'type': 'number',
    'default': 0
  }, {
    'name': 'key',
    'type': 'field'
  }]
};
extension_inherits(extension_Pivot, extension_Aggregate, {
  _transform: extension_Aggregate.prototype.transform,
  transform(_, pulse) {
    return this._transform(extension_aggregateParams(_, pulse), pulse);
  }
});

// Shoehorn a pivot transform into an aggregate transform!
// First collect all unique pivot field values.
// Then generate aggregate fields for each output pivot field.
function extension_aggregateParams(_, pulse) {
  const key = _.field,
    value = _.value,
    op = (_.op === 'count' ? '__count__' : _.op) || 'sum',
    fields = extension_accessorFields(key).concat(extension_accessorFields(value)),
    keys = extension_vega_transforms_module_pivotKeys(key, _.limit || 0, pulse);

  // if data stream content changes, pivot fields may change
  // flag parameter modification to ensure re-initialization
  if (pulse.changed()) _.set('__pivot__', null, null, true);
  return {
    key: _.key,
    groupby: _.groupby,
    ops: keys.map(() => op),
    fields: keys.map(k => extension_vega_transforms_module_get(k, key, value, fields)),
    as: keys.map(k => k + ''),
    modified: _.modified.bind(_)
  };
}

// Generate aggregate field accessor.
// Output NaN for non-existent values; aggregator will ignore!
function extension_vega_transforms_module_get(k, key, value, fields) {
  return extension_accessor(d => key(d) === k ? value(d) : NaN, fields, k + '');
}

// Collect (and optionally limit) all unique pivot values.
function extension_vega_transforms_module_pivotKeys(key, limit, pulse) {
  const map = {},
    list = [];
  pulse.visit(pulse.SOURCE, t => {
    const k = key(t);
    if (!map[k]) {
      map[k] = 1;
      list.push(k);
    }
  });
  list.sort(extension_vega_util_module_ascending);
  return limit ? list.slice(0, limit) : list;
}

/**
 * Partitions pre-faceted data into tuple subflows.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(Dataflow, string): Operator} params.subflow - A function
 *   that generates a subflow of operators and returns its root operator.
 * @param {function(object): Array<object>} params.field - The field
 *   accessor for an array of subflow tuple objects.
 */
function extension_PreFacet(params) {
  extension_Facet.call(this, params);
}
extension_inherits(extension_PreFacet, extension_Facet, {
  transform(_, pulse) {
    const flow = _.subflow,
      field = _.field,
      subflow = t => this.subflow(extension_tupleid(t), flow, pulse, t);
    if (_.modified('field') || field && pulse.modified(extension_accessorFields(field))) {
      extension_vega_util_module_error('PreFacet does not support field modification.');
    }
    this.initTargets(); // reset list of active subflows

    if (field) {
      pulse.visit(pulse.MOD, t => {
        const sf = subflow(t);
        field(t).forEach(_ => sf.mod(_));
      });
      pulse.visit(pulse.ADD, t => {
        const sf = subflow(t);
        field(t).forEach(_ => sf.add(extension_ingest$1(_)));
      });
      pulse.visit(pulse.REM, t => {
        const sf = subflow(t);
        field(t).forEach(_ => sf.rem(_));
      });
    } else {
      pulse.visit(pulse.MOD, t => subflow(t).mod(t));
      pulse.visit(pulse.ADD, t => subflow(t).add(t));
      pulse.visit(pulse.REM, t => subflow(t).rem(t));
    }
    if (pulse.clean()) {
      pulse.runAfter(() => this.clean());
    }
    return pulse;
  }
});

/**
 * Performs a relational projection, copying selected fields from source
 * tuples to a new set of derived tuples.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<function(object): *} params.fields - The fields to project,
 *   as an array of field accessors. If unspecified, all fields will be
 *   copied with names unchanged.
 * @param {Array<string>} [params.as] - Output field names for each projected
 *   field. Any unspecified fields will use the field name provided by
 *   the field accessor.
 */
function extension_Project(params) {
  extension_Transform.call(this, null, params);
}
extension_Project.Definition = {
  'type': 'Project',
  'metadata': {
    'generates': true,
    'changes': true
  },
  'params': [{
    'name': 'fields',
    'type': 'field',
    'array': true
  }, {
    'name': 'as',
    'type': 'string',
    'null': true,
    'array': true
  }]
};
extension_inherits(extension_Project, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.NO_SOURCE),
      fields = _.fields,
      as = extension_fieldNames(_.fields, _.as || []),
      derive = fields ? (s, t) => extension_project(s, t, fields, as) : extension_rederive;
    let lut;
    if (this.value) {
      lut = this.value;
    } else {
      pulse = pulse.addAll();
      lut = this.value = {};
    }
    pulse.visit(pulse.REM, t => {
      const id = extension_tupleid(t);
      out.rem.push(lut[id]);
      lut[id] = null;
    });
    pulse.visit(pulse.ADD, t => {
      const dt = derive(t, extension_ingest$1({}));
      lut[extension_tupleid(t)] = dt;
      out.add.push(dt);
    });
    pulse.visit(pulse.MOD, t => {
      out.mod.push(derive(t, lut[extension_tupleid(t)]));
    });
    return out;
  }
});
function extension_project(s, t, fields, as) {
  for (let i = 0, n = fields.length; i < n; ++i) {
    t[as[i]] = fields[i](s);
  }
  return t;
}

/**
 * Proxy the value of another operator as a pure signal value.
 * Ensures no tuples are propagated.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {*} params.value - The value to proxy, becomes the value of this operator.
 */
function extension_vega_transforms_module_Proxy(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_vega_transforms_module_Proxy, extension_Transform, {
  transform(_, pulse) {
    this.value = _.value;
    return _.modified('value') ? pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS) : pulse.StopPropagation;
  }
});

/**
 * Generates sample quantile values from an input data stream.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - An accessor for the data field
 *   over which to calculate quantile values.
 * @param {Array<function(object): *>} [params.groupby] - An array of accessors
 *   to groupby.
 * @param {Array<number>} [params.probs] - An array of probabilities in
 *   the range (0, 1) for which to compute quantile values. If not specified,
 *   the *step* parameter will be used.
 * @param {Array<number>} [params.step=0.01] - A probability step size for
 *   sampling quantile values. All values from one-half the step size up to
 *   1 (exclusive) will be sampled. This parameter is only used if the
 *   *quantiles* parameter is not provided.
 */
function extension_Quantile(params) {
  extension_Transform.call(this, null, params);
}
extension_Quantile.Definition = {
  'type': 'Quantile',
  'metadata': {
    'generates': true,
    'changes': true
  },
  'params': [{
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'field',
    'type': 'field',
    'required': true
  }, {
    'name': 'probs',
    'type': 'number',
    'array': true
  }, {
    'name': 'step',
    'type': 'number',
    'default': 0.01
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'default': ['prob', 'value']
  }]
};
const extension_EPSILON = 1e-14;
extension_inherits(extension_Quantile, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS),
      as = _.as || ['prob', 'value'];
    if (this.value && !_.modified() && !pulse.changed()) {
      out.source = this.value;
      return out;
    }
    const source = pulse.materialize(pulse.SOURCE).source,
      groups = extension_partition$1(source, _.groupby, _.field),
      names = (_.groupby || []).map(extension_accessorName),
      values = [],
      step = _.step || 0.01,
      p = _.probs || extension_range_range(step / 2, 1 - extension_EPSILON, step),
      n = p.length;
    groups.forEach(g => {
      const q = extension_quantiles(g, p);
      for (let i = 0; i < n; ++i) {
        const t = {};
        for (let i = 0; i < names.length; ++i) {
          t[names[i]] = g.dims[i];
        }
        t[as[0]] = p[i];
        t[as[1]] = q[i];
        values.push(extension_ingest$1(t));
      }
    });
    if (this.value) out.rem = this.value;
    this.value = out.add = out.source = values;
    return out;
  }
});

/**
 * Relays a data stream between data processing pipelines.
 * If the derive parameter is set, this transform will create derived
 * copies of observed tuples. This provides derived data streams in which
 * modifications to the tuples do not pollute an upstream data source.
 * @param {object} params - The parameters for this operator.
 * @param {number} [params.derive=false] - Boolean flag indicating if
 *   the transform should make derived copies of incoming tuples.
 * @constructor
 */
function extension_Relay(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_Relay, extension_Transform, {
  transform(_, pulse) {
    let out, lut;
    if (this.value) {
      lut = this.value;
    } else {
      out = pulse = pulse.addAll();
      lut = this.value = {};
    }
    if (_.derive) {
      out = pulse.fork(pulse.NO_SOURCE);
      pulse.visit(pulse.REM, t => {
        const id = extension_tupleid(t);
        out.rem.push(lut[id]);
        lut[id] = null;
      });
      pulse.visit(pulse.ADD, t => {
        const dt = extension_vega_dataflow_module_derive(t);
        lut[extension_tupleid(t)] = dt;
        out.add.push(dt);
      });
      pulse.visit(pulse.MOD, t => {
        const dt = lut[extension_tupleid(t)];
        for (const k in t) {
          dt[k] = t[k];
          // down stream writes may overwrite re-derived tuples
          // conservatively mark all source fields as modified
          out.modifies(k);
        }
        out.mod.push(dt);
      });
    }
    return out;
  }
});

/**
 * Samples tuples passing through this operator.
 * Uses reservoir sampling to maintain a representative sample.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {number} [params.size=1000] - The maximum number of samples.
 */
function extension_Sample(params) {
  extension_Transform.call(this, [], params);
  this.count = 0;
}
extension_Sample.Definition = {
  'type': 'Sample',
  'metadata': {},
  'params': [{
    'name': 'size',
    'type': 'number',
    'default': 1000
  }]
};
extension_inherits(extension_Sample, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.NO_SOURCE),
      mod = _.modified('size'),
      num = _.size,
      map = this.value.reduce((m, t) => (m[extension_tupleid(t)] = 1, m), {});
    let res = this.value,
      cnt = this.count,
      cap = 0;

    // sample reservoir update function
    function update(t) {
      let p, idx;
      if (res.length < num) {
        res.push(t);
      } else {
        idx = ~~((cnt + 1) * extension_vega_statistics_module_random());
        if (idx < res.length && idx >= cap) {
          p = res[idx];
          if (map[extension_tupleid(p)]) out.rem.push(p); // eviction
          res[idx] = t;
        }
      }
      ++cnt;
    }
    if (pulse.rem.length) {
      // find all tuples that should be removed, add to output
      pulse.visit(pulse.REM, t => {
        const id = extension_tupleid(t);
        if (map[id]) {
          map[id] = -1;
          out.rem.push(t);
        }
        --cnt;
      });

      // filter removed tuples out of the sample reservoir
      res = res.filter(t => map[extension_tupleid(t)] !== -1);
    }
    if ((pulse.rem.length || mod) && res.length < num && pulse.source) {
      // replenish sample if backing data source is available
      cap = cnt = res.length;
      pulse.visit(pulse.SOURCE, t => {
        // update, but skip previously sampled tuples
        if (!map[extension_tupleid(t)]) update(t);
      });
      cap = -1;
    }
    if (mod && res.length > num) {
      const n = res.length - num;
      for (let i = 0; i < n; ++i) {
        map[extension_tupleid(res[i])] = -1;
        out.rem.push(res[i]);
      }
      res = res.slice(n);
    }
    if (pulse.mod.length) {
      // propagate modified tuples in the sample reservoir
      pulse.visit(pulse.MOD, t => {
        if (map[extension_tupleid(t)]) out.mod.push(t);
      });
    }
    if (pulse.add.length) {
      // update sample reservoir
      pulse.visit(pulse.ADD, update);
    }
    if (pulse.add.length || cap < 0) {
      // output newly added tuples
      out.add = res.filter(t => !map[extension_tupleid(t)]);
    }
    this.count = cnt;
    this.value = out.source = res;
    return out;
  }
});

/**
 * Generates data tuples for a specified sequence range of numbers.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {number} params.start - The first number in the sequence.
 * @param {number} params.stop - The last number (exclusive) in the sequence.
 * @param {number} [params.step=1] - The step size between numbers in the sequence.
 */
function extension_Sequence(params) {
  extension_Transform.call(this, null, params);
}
extension_Sequence.Definition = {
  'type': 'Sequence',
  'metadata': {
    'generates': true,
    'changes': true
  },
  'params': [{
    'name': 'start',
    'type': 'number',
    'required': true
  }, {
    'name': 'stop',
    'type': 'number',
    'required': true
  }, {
    'name': 'step',
    'type': 'number',
    'default': 1
  }, {
    'name': 'as',
    'type': 'string',
    'default': 'data'
  }]
};
extension_inherits(extension_Sequence, extension_Transform, {
  transform(_, pulse) {
    if (this.value && !_.modified()) return;
    const out = pulse.materialize().fork(pulse.MOD),
      as = _.as || 'data';
    out.rem = this.value ? pulse.rem.concat(this.value) : pulse.rem;
    this.value = extension_range_range(_.start, _.stop, _.step || 1).map(v => {
      const t = {};
      t[as] = v;
      return extension_ingest$1(t);
    });
    out.add = pulse.add.concat(this.value);
    return out;
  }
});

/**
 * Propagates a new pulse without any tuples so long as the input
 * pulse contains some added, removed or modified tuples.
 * @param {object} params - The parameters for this operator.
 * @constructor
 */
function extension_Sieve(params) {
  extension_Transform.call(this, null, params);
  this.modified(true); // always treat as modified
}
extension_inherits(extension_Sieve, extension_Transform, {
  transform(_, pulse) {
    this.value = pulse.source;
    return pulse.changed() ? pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS) : pulse.StopPropagation;
  }
});

/**
 * Discretize dates to specific time units.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The data field containing date/time values.
 */
function extension_vega_transforms_module_TimeUnit(params) {
  extension_Transform.call(this, null, params);
}
const extension_OUTPUT = ['unit0', 'unit1'];
extension_vega_transforms_module_TimeUnit.Definition = {
  'type': 'TimeUnit',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'field',
    'type': 'field',
    'required': true
  }, {
    'name': 'interval',
    'type': 'boolean',
    'default': true
  }, {
    'name': 'units',
    'type': 'enum',
    'values': extension_TIME_UNITS,
    'array': true
  }, {
    'name': 'step',
    'type': 'number',
    'default': 1
  }, {
    'name': 'maxbins',
    'type': 'number',
    'default': 40
  }, {
    'name': 'extent',
    'type': 'date',
    'array': true
  }, {
    'name': 'timezone',
    'type': 'enum',
    'default': 'local',
    'values': ['local', 'utc']
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': 2,
    'default': extension_OUTPUT
  }]
};
extension_inherits(extension_vega_transforms_module_TimeUnit, extension_Transform, {
  transform(_, pulse) {
    const field = _.field,
      band = _.interval !== false,
      utc = _.timezone === 'utc',
      floor = this._floor(_, pulse),
      offset = (utc ? extension_utcInterval : extension_vega_time_module_timeInterval)(floor.unit).offset,
      as = _.as || extension_OUTPUT,
      u0 = as[0],
      u1 = as[1],
      step = floor.step;
    let min = floor.start || Infinity,
      max = floor.stop || -Infinity,
      flag = pulse.ADD;
    if (_.modified() || pulse.changed(pulse.REM) || pulse.modified(extension_accessorFields(field))) {
      pulse = pulse.reflow(true);
      flag = pulse.SOURCE;
      min = Infinity;
      max = -Infinity;
    }
    pulse.visit(flag, t => {
      const v = field(t);
      let a, b;
      if (v == null) {
        t[u0] = null;
        if (band) t[u1] = null;
      } else {
        t[u0] = a = b = floor(v);
        if (band) t[u1] = b = offset(a, step);
        if (a < min) min = a;
        if (b > max) max = b;
      }
    });
    floor.start = min;
    floor.stop = max;
    return pulse.modifies(band ? as : u0);
  },
  _floor(_, pulse) {
    const utc = _.timezone === 'utc';

    // get parameters
    const {
      units,
      step
    } = _.units ? {
      units: _.units,
      step: _.step || 1
    } : extension_vega_time_module_bin({
      extent: _.extent || extension_extent(pulse.materialize(pulse.SOURCE).source, _.field),
      maxbins: _.maxbins
    });

    // check / standardize time units
    const tunits = extension_timeUnits(units),
      prev = this.value || {},
      floor = (utc ? extension_utcFloor : extension_timeFloor)(tunits, step);
    floor.unit = extension_peek(tunits);
    floor.units = tunits;
    floor.step = step;
    floor.start = prev.start;
    floor.stop = prev.stop;
    return this.value = floor;
  }
});

/**
 * An index that maps from unique, string-coerced, field values to tuples.
 * Assumes that the field serves as a unique key with no duplicate values.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The field accessor to index.
 */
function extension_TupleIndex(params) {
  extension_Transform.call(this, extension_fastmap(), params);
}
extension_inherits(extension_TupleIndex, extension_Transform, {
  transform(_, pulse) {
    const df = pulse.dataflow,
      field = _.field,
      index = this.value,
      set = t => index.set(field(t), t);
    let mod = true;
    if (_.modified('field') || pulse.modified(field.fields)) {
      index.clear();
      pulse.visit(pulse.SOURCE, set);
    } else if (pulse.changed()) {
      pulse.visit(pulse.REM, t => index.delete(field(t)));
      pulse.visit(pulse.ADD, set);
    } else {
      mod = false;
    }
    this.modified(mod);
    if (index.empty > df.cleanThreshold) df.runAfter(index.clean);
    return pulse.fork();
  }
});

/**
 * Extracts an array of values. Assumes the source data has already been
 * reduced as needed (e.g., by an upstream Aggregate transform).
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The domain field to extract.
 * @param {function(*,*): number} [params.sort] - An optional
 *   comparator function for sorting the values. The comparator will be
 *   applied to backing tuples prior to value extraction.
 */
function extension_Values(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_Values, extension_Transform, {
  transform(_, pulse) {
    const run = !this.value || _.modified('field') || _.modified('sort') || pulse.changed() || _.sort && pulse.modified(_.sort.fields);
    if (run) {
      this.value = (_.sort ? pulse.source.slice().sort(extension_stableCompare(_.sort)) : pulse.source).map(_.field);
    }
  }
});

function extension_WindowOp(op, field, param, as) {
  const fn = extension_WindowOps[op](field, param);
  return {
    init: fn.init || extension_zero,
    update: function (w, t) {
      t[as] = fn.next(w);
    }
  };
}
const extension_WindowOps = {
  row_number: function () {
    return {
      next: w => w.index + 1
    };
  },
  rank: function () {
    let rank;
    return {
      init: () => rank = 1,
      next: w => {
        const i = w.index,
          data = w.data;
        return i && w.compare(data[i - 1], data[i]) ? rank = i + 1 : rank;
      }
    };
  },
  dense_rank: function () {
    let drank;
    return {
      init: () => drank = 1,
      next: w => {
        const i = w.index,
          d = w.data;
        return i && w.compare(d[i - 1], d[i]) ? ++drank : drank;
      }
    };
  },
  percent_rank: function () {
    const rank = extension_WindowOps.rank(),
      next = rank.next;
    return {
      init: rank.init,
      next: w => (next(w) - 1) / (w.data.length - 1)
    };
  },
  cume_dist: function () {
    let cume;
    return {
      init: () => cume = 0,
      next: w => {
        const d = w.data,
          c = w.compare;
        let i = w.index;
        if (cume < i) {
          while (i + 1 < d.length && !c(d[i], d[i + 1])) ++i;
          cume = i;
        }
        return (1 + cume) / d.length;
      }
    };
  },
  ntile: function (field, num) {
    num = +num;
    if (!(num > 0)) extension_vega_util_module_error('ntile num must be greater than zero.');
    const cume = extension_WindowOps.cume_dist(),
      next = cume.next;
    return {
      init: cume.init,
      next: w => Math.ceil(num * next(w))
    };
  },
  lag: function (field, offset) {
    offset = +offset || 1;
    return {
      next: w => {
        const i = w.index - offset;
        return i >= 0 ? field(w.data[i]) : null;
      }
    };
  },
  lead: function (field, offset) {
    offset = +offset || 1;
    return {
      next: w => {
        const i = w.index + offset,
          d = w.data;
        return i < d.length ? field(d[i]) : null;
      }
    };
  },
  first_value: function (field) {
    return {
      next: w => field(w.data[w.i0])
    };
  },
  last_value: function (field) {
    return {
      next: w => field(w.data[w.i1 - 1])
    };
  },
  nth_value: function (field, nth) {
    nth = +nth;
    if (!(nth > 0)) extension_vega_util_module_error('nth_value nth must be greater than zero.');
    return {
      next: w => {
        const i = w.i0 + (nth - 1);
        return i < w.i1 ? field(w.data[i]) : null;
      }
    };
  },
  prev_value: function (field) {
    let prev;
    return {
      init: () => prev = null,
      next: w => {
        const v = field(w.data[w.index]);
        return v != null ? prev = v : prev;
      }
    };
  },
  next_value: function (field) {
    let v, i;
    return {
      init: () => (v = null, i = -1),
      next: w => {
        const d = w.data;
        return w.index <= i ? v : (i = extension_vega_transforms_module_find(field, d, w.index)) < 0 ? (i = d.length, v = null) : v = field(d[i]);
      }
    };
  }
};
function extension_vega_transforms_module_find(field, data, index) {
  for (let n = data.length; index < n; ++index) {
    const v = field(data[index]);
    if (v != null) return index;
  }
  return -1;
}
const extension_ValidWindowOps = Object.keys(extension_WindowOps);

function extension_WindowState(_) {
  const ops = extension_vega_util_module_array(_.ops),
    fields = extension_vega_util_module_array(_.fields),
    params = extension_vega_util_module_array(_.params),
    aggregate_params = extension_vega_util_module_array(_.aggregate_params),
    as = extension_vega_util_module_array(_.as),
    outputs = this.outputs = [],
    windows = this.windows = [],
    inputs = {},
    map = {},
    counts = [],
    measures = [];
  let countOnly = true;
  function visitInputs(f) {
    extension_vega_util_module_array(extension_accessorFields(f)).forEach(_ => inputs[_] = 1);
  }
  visitInputs(_.sort);
  ops.forEach((op, i) => {
    const field = fields[i],
      param = params[i],
      aggregate_param = aggregate_params[i] || null,
      mname = extension_accessorName(field),
      name = extension_measureName(op, mname, as[i]);
    visitInputs(field);
    outputs.push(name);

    // Window operation
    if (extension_vega_util_module_has(extension_WindowOps, op)) {
      windows.push(extension_WindowOp(op, field, param, name));
    }

    // Aggregate operation
    else {
      if (field == null && op !== 'count') {
        extension_vega_util_module_error('Null aggregate field specified.');
      }
      if (op === 'count') {
        counts.push(name);
        return;
      }
      countOnly = false;
      let m = map[mname];
      if (!m) {
        m = map[mname] = [];
        m.field = field;
        measures.push(m);
      }
      m.push(extension_createMeasure(op, aggregate_param, name));
    }
  });
  if (counts.length || measures.length) {
    this.cell = extension_cell(measures, counts, countOnly);
  }
  this.inputs = Object.keys(inputs);
}
const extension_vega_transforms_module_prototype = extension_WindowState.prototype;
extension_vega_transforms_module_prototype.init = function () {
  this.windows.forEach(_ => _.init());
  if (this.cell) this.cell.init();
};
extension_vega_transforms_module_prototype.update = function (w, t) {
  const cell = this.cell,
    wind = this.windows,
    data = w.data,
    m = wind && wind.length;
  let j;
  if (cell) {
    for (j = w.p0; j < w.i0; ++j) cell.rem(data[j]);
    for (j = w.p1; j < w.i1; ++j) cell.add(data[j]);
    cell.set(t);
  }
  for (j = 0; j < m; ++j) wind[j].update(w, t);
};
function extension_cell(measures, counts, countOnly) {
  measures = measures.map(m => extension_compileMeasures(m, m.field));
  const cell = {
    num: 0,
    agg: null,
    store: false,
    count: counts
  };
  if (!countOnly) {
    var n = measures.length,
      a = cell.agg = Array(n),
      i = 0;
    for (; i < n; ++i) a[i] = new measures[i](cell);
  }
  if (cell.store) {
    var store = cell.data = new extension_TupleStore();
  }
  cell.add = function (t) {
    cell.num += 1;
    if (countOnly) return;
    if (store) store.add(t);
    for (let i = 0; i < n; ++i) {
      a[i].add(a[i].get(t), t);
    }
  };
  cell.rem = function (t) {
    cell.num -= 1;
    if (countOnly) return;
    if (store) store.rem(t);
    for (let i = 0; i < n; ++i) {
      a[i].rem(a[i].get(t), t);
    }
  };
  cell.set = function (t) {
    let i, n;

    // consolidate stored values
    if (store) store.values();

    // update tuple properties
    for (i = 0, n = counts.length; i < n; ++i) t[counts[i]] = cell.num;
    if (!countOnly) for (i = 0, n = a.length; i < n; ++i) a[i].set(t);
  };
  cell.init = function () {
    cell.num = 0;
    if (store) store.reset();
    for (let i = 0; i < n; ++i) a[i].init();
  };
  return cell;
}

/**
 * Perform window calculations and write results to the input stream.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(*,*): number} [params.sort] - A comparator function for sorting tuples within a window.
 * @param {Array<function(object): *>} [params.groupby] - An array of accessors by which to partition tuples into separate windows.
 * @param {Array<string>} params.ops - An array of strings indicating window operations to perform.
 * @param {Array<function(object): *>} [params.fields] - An array of accessors
 *   for data fields to use as inputs to window operations.
 * @param {Array<*>} [params.params] - An array of parameter values for window operations.
 * @param {Array<number>} [params.aggregate_params] - An optional array of parameter values for aggregation operations.
 * @param {Array<string>} [params.as] - An array of output field names for window operations.
 * @param {Array<number>} [params.frame] - Window frame definition as two-element array.
 * @param {boolean} [params.ignorePeers=false] - If true, base window frame boundaries on row
 *   number alone, ignoring peers with identical sort values. If false (default),
 *   the window boundaries will be adjusted to include peer values.
 */
function extension_vega_transforms_module_Window(params) {
  extension_Transform.call(this, {}, params);
  this._mlen = 0;
  this._mods = [];
}
extension_vega_transforms_module_Window.Definition = {
  'type': 'Window',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'sort',
    'type': 'compare'
  }, {
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'ops',
    'type': 'enum',
    'array': true,
    'values': extension_ValidWindowOps.concat(extension_ValidAggregateOps)
  }, {
    'name': 'params',
    'type': 'number',
    'null': true,
    'array': true
  }, {
    'name': 'aggregate_params',
    'type': 'number',
    'null': true,
    'array': true
  }, {
    'name': 'fields',
    'type': 'field',
    'null': true,
    'array': true
  }, {
    'name': 'as',
    'type': 'string',
    'null': true,
    'array': true
  }, {
    'name': 'frame',
    'type': 'number',
    'null': true,
    'array': true,
    'length': 2,
    'default': [null, 0]
  }, {
    'name': 'ignorePeers',
    'type': 'boolean',
    'default': false
  }]
};
extension_inherits(extension_vega_transforms_module_Window, extension_Transform, {
  transform(_, pulse) {
    this.stamp = pulse.stamp;
    const mod = _.modified(),
      cmp = extension_stableCompare(_.sort),
      key = extension_groupkey(_.groupby),
      group = t => this.group(key(t));

    // initialize window state
    let state = this.state;
    if (!state || mod) {
      state = this.state = new extension_WindowState(_);
    }

    // partition input tuples
    if (mod || pulse.modified(state.inputs)) {
      this.value = {};
      pulse.visit(pulse.SOURCE, t => group(t).add(t));
    } else {
      pulse.visit(pulse.REM, t => group(t).remove(t));
      pulse.visit(pulse.ADD, t => group(t).add(t));
    }

    // perform window calculations for each modified partition
    for (let i = 0, n = this._mlen; i < n; ++i) {
      extension_processPartition(this._mods[i], state, cmp, _);
    }
    this._mlen = 0;
    this._mods = [];

    // TODO don't reflow everything?
    return pulse.reflow(mod).modifies(state.outputs);
  },
  group(key) {
    let group = this.value[key];
    if (!group) {
      group = this.value[key] = extension_SortedList(extension_tupleid);
      group.stamp = -1;
    }
    if (group.stamp < this.stamp) {
      group.stamp = this.stamp;
      this._mods[this._mlen++] = group;
    }
    return group;
  }
});
function extension_processPartition(list, state, cmp, _) {
  const sort = _.sort,
    range = sort && !_.ignorePeers,
    frame = _.frame || [null, 0],
    data = list.data(cmp),
    // use cmp for stable sort
    n = data.length,
    b = range ? extension_bisector_bisector(sort) : null,
    w = {
      i0: 0,
      i1: 0,
      p0: 0,
      p1: 0,
      index: 0,
      data: data,
      compare: sort || extension_vega_util_module_constant(-1)
    };
  state.init();
  for (let i = 0; i < n; ++i) {
    extension_setWindow(w, frame, i, n);
    if (range) extension_adjustRange(w, b);
    state.update(w, data[i]);
  }
}
function extension_setWindow(w, f, i, n) {
  w.p0 = w.i0;
  w.p1 = w.i1;
  w.i0 = f[0] == null ? 0 : Math.max(0, i - Math.abs(f[0]));
  w.i1 = f[1] == null ? n : Math.min(n, i + Math.abs(f[1]) + 1);
  w.index = i;
}

// if frame type is 'range', adjust window for peer values
function extension_adjustRange(w, bisect) {
  const r0 = w.i0,
    r1 = w.i1 - 1,
    c = w.compare,
    d = w.data,
    n = d.length - 1;
  if (r0 > 0 && !c(d[r0], d[r0 - 1])) w.i0 = bisect.left(d, d[r0]);
  if (r1 < n && !c(d[r1], d[r1 + 1])) w.i1 = bisect.right(d, d[r1]);
}



;// ../../node_modules/d3-shape/src/curve/basis.js
function extension_point(that, x, y) {
  that._context.bezierCurveTo(
    (2 * that._x0 + that._x1) / 3,
    (2 * that._y0 + that._y1) / 3,
    (that._x0 + 2 * that._x1) / 3,
    (that._y0 + 2 * that._y1) / 3,
    (that._x0 + 4 * that._x1 + x) / 6,
    (that._y0 + 4 * that._y1 + y) / 6
  );
}

function extension_Basis(context) {
  this._context = context;
}

extension_Basis.prototype = {
  areaStart: function() {
    this._line = 0;
  },
  areaEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._x0 = this._x1 =
    this._y0 = this._y1 = NaN;
    this._point = 0;
  },
  lineEnd: function() {
    switch (this._point) {
      case 3: extension_point(this, this._x1, this._y1); // falls through
      case 2: this._context.lineTo(this._x1, this._y1); break;
    }
    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
    this._line = 1 - this._line;
  },
  point: function(x, y) {
    x = +x, y = +y;
    switch (this._point) {
      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
      case 1: this._point = 2; break;
      case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // falls through
      default: extension_point(this, x, y); break;
    }
    this._x0 = this._x1, this._x1 = x;
    this._y0 = this._y1, this._y1 = y;
  }
};

/* harmony default export */ function extension_basis(context) {
  return new extension_Basis(context);
}

;// ../../node_modules/d3-shape/src/noop.js
/* harmony default export */ function extension_src_noop() {}

;// ../../node_modules/d3-shape/src/curve/basisClosed.js



function extension_BasisClosed(context) {
  this._context = context;
}

extension_BasisClosed.prototype = {
  areaStart: extension_src_noop,
  areaEnd: extension_src_noop,
  lineStart: function() {
    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
    this._point = 0;
  },
  lineEnd: function() {
    switch (this._point) {
      case 1: {
        this._context.moveTo(this._x2, this._y2);
        this._context.closePath();
        break;
      }
      case 2: {
        this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
        this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
        this._context.closePath();
        break;
      }
      case 3: {
        this.point(this._x2, this._y2);
        this.point(this._x3, this._y3);
        this.point(this._x4, this._y4);
        break;
      }
    }
  },
  point: function(x, y) {
    x = +x, y = +y;
    switch (this._point) {
      case 0: this._point = 1; this._x2 = x, this._y2 = y; break;
      case 1: this._point = 2; this._x3 = x, this._y3 = y; break;
      case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;
      default: extension_point(this, x, y); break;
    }
    this._x0 = this._x1, this._x1 = x;
    this._y0 = this._y1, this._y1 = y;
  }
};

/* harmony default export */ function extension_basisClosed(context) {
  return new extension_BasisClosed(context);
}

;// ../../node_modules/d3-shape/src/curve/basisOpen.js


function extension_BasisOpen(context) {
  this._context = context;
}

extension_BasisOpen.prototype = {
  areaStart: function() {
    this._line = 0;
  },
  areaEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._x0 = this._x1 =
    this._y0 = this._y1 = NaN;
    this._point = 0;
  },
  lineEnd: function() {
    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
    this._line = 1 - this._line;
  },
  point: function(x, y) {
    x = +x, y = +y;
    switch (this._point) {
      case 0: this._point = 1; break;
      case 1: this._point = 2; break;
      case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;
      case 3: this._point = 4; // falls through
      default: extension_point(this, x, y); break;
    }
    this._x0 = this._x1, this._x1 = x;
    this._y0 = this._y1, this._y1 = y;
  }
};

/* harmony default export */ function extension_basisOpen(context) {
  return new extension_BasisOpen(context);
}

;// ../../node_modules/d3-shape/src/curve/bundle.js


function extension_Bundle(context, beta) {
  this._basis = new extension_Basis(context);
  this._beta = beta;
}

extension_Bundle.prototype = {
  lineStart: function() {
    this._x = [];
    this._y = [];
    this._basis.lineStart();
  },
  lineEnd: function() {
    var x = this._x,
        y = this._y,
        j = x.length - 1;

    if (j > 0) {
      var x0 = x[0],
          y0 = y[0],
          dx = x[j] - x0,
          dy = y[j] - y0,
          i = -1,
          t;

      while (++i <= j) {
        t = i / j;
        this._basis.point(
          this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),
          this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)
        );
      }
    }

    this._x = this._y = null;
    this._basis.lineEnd();
  },
  point: function(x, y) {
    this._x.push(+x);
    this._y.push(+y);
  }
};

/* harmony default export */ const extension_bundle = ((function custom(beta) {

  function bundle(context) {
    return beta === 1 ? new extension_Basis(context) : new extension_Bundle(context, beta);
  }

  bundle.beta = function(beta) {
    return custom(+beta);
  };

  return bundle;
})(0.85));

;// ../../node_modules/d3-shape/src/curve/cardinal.js
function extension_cardinal_point(that, x, y) {
  that._context.bezierCurveTo(
    that._x1 + that._k * (that._x2 - that._x0),
    that._y1 + that._k * (that._y2 - that._y0),
    that._x2 + that._k * (that._x1 - x),
    that._y2 + that._k * (that._y1 - y),
    that._x2,
    that._y2
  );
}

function extension_Cardinal(context, tension) {
  this._context = context;
  this._k = (1 - tension) / 6;
}

extension_Cardinal.prototype = {
  areaStart: function() {
    this._line = 0;
  },
  areaEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._x0 = this._x1 = this._x2 =
    this._y0 = this._y1 = this._y2 = NaN;
    this._point = 0;
  },
  lineEnd: function() {
    switch (this._point) {
      case 2: this._context.lineTo(this._x2, this._y2); break;
      case 3: extension_cardinal_point(this, this._x1, this._y1); break;
    }
    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
    this._line = 1 - this._line;
  },
  point: function(x, y) {
    x = +x, y = +y;
    switch (this._point) {
      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
      case 1: this._point = 2; this._x1 = x, this._y1 = y; break;
      case 2: this._point = 3; // falls through
      default: extension_cardinal_point(this, x, y); break;
    }
    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
  }
};

/* harmony default export */ const extension_cardinal = ((function custom(tension) {

  function cardinal(context) {
    return new extension_Cardinal(context, tension);
  }

  cardinal.tension = function(tension) {
    return custom(+tension);
  };

  return cardinal;
})(0));

;// ../../node_modules/d3-shape/src/curve/cardinalOpen.js


function extension_CardinalOpen(context, tension) {
  this._context = context;
  this._k = (1 - tension) / 6;
}

extension_CardinalOpen.prototype = {
  areaStart: function() {
    this._line = 0;
  },
  areaEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._x0 = this._x1 = this._x2 =
    this._y0 = this._y1 = this._y2 = NaN;
    this._point = 0;
  },
  lineEnd: function() {
    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
    this._line = 1 - this._line;
  },
  point: function(x, y) {
    x = +x, y = +y;
    switch (this._point) {
      case 0: this._point = 1; break;
      case 1: this._point = 2; break;
      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
      case 3: this._point = 4; // falls through
      default: extension_cardinal_point(this, x, y); break;
    }
    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
  }
};

/* harmony default export */ const extension_cardinalOpen = ((function custom(tension) {

  function cardinal(context) {
    return new extension_CardinalOpen(context, tension);
  }

  cardinal.tension = function(tension) {
    return custom(+tension);
  };

  return cardinal;
})(0));

;// ../../node_modules/d3-shape/src/curve/cardinalClosed.js



function extension_CardinalClosed(context, tension) {
  this._context = context;
  this._k = (1 - tension) / 6;
}

extension_CardinalClosed.prototype = {
  areaStart: extension_src_noop,
  areaEnd: extension_src_noop,
  lineStart: function() {
    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
    this._point = 0;
  },
  lineEnd: function() {
    switch (this._point) {
      case 1: {
        this._context.moveTo(this._x3, this._y3);
        this._context.closePath();
        break;
      }
      case 2: {
        this._context.lineTo(this._x3, this._y3);
        this._context.closePath();
        break;
      }
      case 3: {
        this.point(this._x3, this._y3);
        this.point(this._x4, this._y4);
        this.point(this._x5, this._y5);
        break;
      }
    }
  },
  point: function(x, y) {
    x = +x, y = +y;
    switch (this._point) {
      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
      default: extension_cardinal_point(this, x, y); break;
    }
    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
  }
};

/* harmony default export */ const extension_cardinalClosed = ((function custom(tension) {

  function cardinal(context) {
    return new extension_CardinalClosed(context, tension);
  }

  cardinal.tension = function(tension) {
    return custom(+tension);
  };

  return cardinal;
})(0));

;// ../../node_modules/d3-shape/src/math.js
const extension_abs = Math.abs;
const extension_atan2 = Math.atan2;
const extension_cos = Math.cos;
const extension_math_max = Math.max;
const extension_math_min = Math.min;
const extension_sin = Math.sin;
const extension_sqrt = Math.sqrt;

const extension_math_epsilon = 1e-12;
const extension_pi = Math.PI;
const extension_halfPi = extension_pi / 2;
const extension_tau = 2 * extension_pi;

function extension_acos(x) {
  return x > 1 ? 0 : x < -1 ? extension_pi : Math.acos(x);
}

function extension_asin(x) {
  return x >= 1 ? extension_halfPi : x <= -1 ? -extension_halfPi : Math.asin(x);
}

;// ../../node_modules/d3-shape/src/curve/catmullRom.js



function extension_catmullRom_point(that, x, y) {
  var x1 = that._x1,
      y1 = that._y1,
      x2 = that._x2,
      y2 = that._y2;

  if (that._l01_a > extension_math_epsilon) {
    var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,
        n = 3 * that._l01_a * (that._l01_a + that._l12_a);
    x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;
    y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;
  }

  if (that._l23_a > extension_math_epsilon) {
    var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,
        m = 3 * that._l23_a * (that._l23_a + that._l12_a);
    x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;
    y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;
  }

  that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);
}

function extension_CatmullRom(context, alpha) {
  this._context = context;
  this._alpha = alpha;
}

extension_CatmullRom.prototype = {
  areaStart: function() {
    this._line = 0;
  },
  areaEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._x0 = this._x1 = this._x2 =
    this._y0 = this._y1 = this._y2 = NaN;
    this._l01_a = this._l12_a = this._l23_a =
    this._l01_2a = this._l12_2a = this._l23_2a =
    this._point = 0;
  },
  lineEnd: function() {
    switch (this._point) {
      case 2: this._context.lineTo(this._x2, this._y2); break;
      case 3: this.point(this._x2, this._y2); break;
    }
    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
    this._line = 1 - this._line;
  },
  point: function(x, y) {
    x = +x, y = +y;

    if (this._point) {
      var x23 = this._x2 - x,
          y23 = this._y2 - y;
      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
    }

    switch (this._point) {
      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
      case 1: this._point = 2; break;
      case 2: this._point = 3; // falls through
      default: extension_catmullRom_point(this, x, y); break;
    }

    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
  }
};

/* harmony default export */ const extension_catmullRom = ((function custom(alpha) {

  function catmullRom(context) {
    return alpha ? new extension_CatmullRom(context, alpha) : new extension_Cardinal(context, 0);
  }

  catmullRom.alpha = function(alpha) {
    return custom(+alpha);
  };

  return catmullRom;
})(0.5));

;// ../../node_modules/d3-shape/src/curve/catmullRomClosed.js




function extension_CatmullRomClosed(context, alpha) {
  this._context = context;
  this._alpha = alpha;
}

extension_CatmullRomClosed.prototype = {
  areaStart: extension_src_noop,
  areaEnd: extension_src_noop,
  lineStart: function() {
    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
    this._l01_a = this._l12_a = this._l23_a =
    this._l01_2a = this._l12_2a = this._l23_2a =
    this._point = 0;
  },
  lineEnd: function() {
    switch (this._point) {
      case 1: {
        this._context.moveTo(this._x3, this._y3);
        this._context.closePath();
        break;
      }
      case 2: {
        this._context.lineTo(this._x3, this._y3);
        this._context.closePath();
        break;
      }
      case 3: {
        this.point(this._x3, this._y3);
        this.point(this._x4, this._y4);
        this.point(this._x5, this._y5);
        break;
      }
    }
  },
  point: function(x, y) {
    x = +x, y = +y;

    if (this._point) {
      var x23 = this._x2 - x,
          y23 = this._y2 - y;
      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
    }

    switch (this._point) {
      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
      default: extension_catmullRom_point(this, x, y); break;
    }

    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
  }
};

/* harmony default export */ const extension_catmullRomClosed = ((function custom(alpha) {

  function catmullRom(context) {
    return alpha ? new extension_CatmullRomClosed(context, alpha) : new extension_CardinalClosed(context, 0);
  }

  catmullRom.alpha = function(alpha) {
    return custom(+alpha);
  };

  return catmullRom;
})(0.5));

;// ../../node_modules/d3-shape/src/curve/catmullRomOpen.js



function extension_CatmullRomOpen(context, alpha) {
  this._context = context;
  this._alpha = alpha;
}

extension_CatmullRomOpen.prototype = {
  areaStart: function() {
    this._line = 0;
  },
  areaEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._x0 = this._x1 = this._x2 =
    this._y0 = this._y1 = this._y2 = NaN;
    this._l01_a = this._l12_a = this._l23_a =
    this._l01_2a = this._l12_2a = this._l23_2a =
    this._point = 0;
  },
  lineEnd: function() {
    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
    this._line = 1 - this._line;
  },
  point: function(x, y) {
    x = +x, y = +y;

    if (this._point) {
      var x23 = this._x2 - x,
          y23 = this._y2 - y;
      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
    }

    switch (this._point) {
      case 0: this._point = 1; break;
      case 1: this._point = 2; break;
      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
      case 3: this._point = 4; // falls through
      default: extension_catmullRom_point(this, x, y); break;
    }

    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
  }
};

/* harmony default export */ const extension_catmullRomOpen = ((function custom(alpha) {

  function catmullRom(context) {
    return alpha ? new extension_CatmullRomOpen(context, alpha) : new extension_CardinalOpen(context, 0);
  }

  catmullRom.alpha = function(alpha) {
    return custom(+alpha);
  };

  return catmullRom;
})(0.5));

;// ../../node_modules/d3-shape/src/curve/linear.js
function extension_Linear(context) {
  this._context = context;
}

extension_Linear.prototype = {
  areaStart: function() {
    this._line = 0;
  },
  areaEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._point = 0;
  },
  lineEnd: function() {
    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
    this._line = 1 - this._line;
  },
  point: function(x, y) {
    x = +x, y = +y;
    switch (this._point) {
      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
      case 1: this._point = 2; // falls through
      default: this._context.lineTo(x, y); break;
    }
  }
};

/* harmony default export */ function extension_curve_linear(context) {
  return new extension_Linear(context);
}

;// ../../node_modules/d3-shape/src/curve/linearClosed.js


function extension_LinearClosed(context) {
  this._context = context;
}

extension_LinearClosed.prototype = {
  areaStart: extension_src_noop,
  areaEnd: extension_src_noop,
  lineStart: function() {
    this._point = 0;
  },
  lineEnd: function() {
    if (this._point) this._context.closePath();
  },
  point: function(x, y) {
    x = +x, y = +y;
    if (this._point) this._context.lineTo(x, y);
    else this._point = 1, this._context.moveTo(x, y);
  }
};

/* harmony default export */ function extension_linearClosed(context) {
  return new extension_LinearClosed(context);
}

;// ../../node_modules/d3-shape/src/curve/monotone.js
function extension_sign(x) {
  return x < 0 ? -1 : 1;
}

// Calculate the slopes of the tangents (Hermite-type interpolation) based on
// the following paper: Steffen, M. 1990. A Simple Method for Monotonic
// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.
// NOV(II), P. 443, 1990.
function extension_slope3(that, x2, y2) {
  var h0 = that._x1 - that._x0,
      h1 = x2 - that._x1,
      s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),
      s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),
      p = (s0 * h1 + s1 * h0) / (h0 + h1);
  return (extension_sign(s0) + extension_sign(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;
}

// Calculate a one-sided slope.
function extension_slope2(that, t) {
  var h = that._x1 - that._x0;
  return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;
}

// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations
// "you can express cubic Hermite interpolation in terms of cubic Bézier curves
// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1".
function extension_monotone_point(that, t0, t1) {
  var x0 = that._x0,
      y0 = that._y0,
      x1 = that._x1,
      y1 = that._y1,
      dx = (x1 - x0) / 3;
  that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);
}

function extension_MonotoneX(context) {
  this._context = context;
}

extension_MonotoneX.prototype = {
  areaStart: function() {
    this._line = 0;
  },
  areaEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._x0 = this._x1 =
    this._y0 = this._y1 =
    this._t0 = NaN;
    this._point = 0;
  },
  lineEnd: function() {
    switch (this._point) {
      case 2: this._context.lineTo(this._x1, this._y1); break;
      case 3: extension_monotone_point(this, this._t0, extension_slope2(this, this._t0)); break;
    }
    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
    this._line = 1 - this._line;
  },
  point: function(x, y) {
    var t1 = NaN;

    x = +x, y = +y;
    if (x === this._x1 && y === this._y1) return; // Ignore coincident points.
    switch (this._point) {
      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
      case 1: this._point = 2; break;
      case 2: this._point = 3; extension_monotone_point(this, extension_slope2(this, t1 = extension_slope3(this, x, y)), t1); break;
      default: extension_monotone_point(this, this._t0, t1 = extension_slope3(this, x, y)); break;
    }

    this._x0 = this._x1, this._x1 = x;
    this._y0 = this._y1, this._y1 = y;
    this._t0 = t1;
  }
}

function extension_MonotoneY(context) {
  this._context = new extension_ReflectContext(context);
}

(extension_MonotoneY.prototype = Object.create(extension_MonotoneX.prototype)).point = function(x, y) {
  extension_MonotoneX.prototype.point.call(this, y, x);
};

function extension_ReflectContext(context) {
  this._context = context;
}

extension_ReflectContext.prototype = {
  moveTo: function(x, y) { this._context.moveTo(y, x); },
  closePath: function() { this._context.closePath(); },
  lineTo: function(x, y) { this._context.lineTo(y, x); },
  bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }
};

function extension_monotoneX(context) {
  return new extension_MonotoneX(context);
}

function extension_monotoneY(context) {
  return new extension_MonotoneY(context);
}

;// ../../node_modules/d3-shape/src/curve/natural.js
function extension_Natural(context) {
  this._context = context;
}

extension_Natural.prototype = {
  areaStart: function() {
    this._line = 0;
  },
  areaEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._x = [];
    this._y = [];
  },
  lineEnd: function() {
    var x = this._x,
        y = this._y,
        n = x.length;

    if (n) {
      this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);
      if (n === 2) {
        this._context.lineTo(x[1], y[1]);
      } else {
        var px = extension_controlPoints(x),
            py = extension_controlPoints(y);
        for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {
          this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);
        }
      }
    }

    if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();
    this._line = 1 - this._line;
    this._x = this._y = null;
  },
  point: function(x, y) {
    this._x.push(+x);
    this._y.push(+y);
  }
};

// See https://www.particleincell.com/2012/bezier-splines/ for derivation.
function extension_controlPoints(x) {
  var i,
      n = x.length - 1,
      m,
      a = new Array(n),
      b = new Array(n),
      r = new Array(n);
  a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];
  for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];
  a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];
  for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];
  a[n - 1] = r[n - 1] / b[n - 1];
  for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];
  b[n - 1] = (x[n] + a[n - 1]) / 2;
  for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];
  return [a, b];
}

/* harmony default export */ function extension_natural(context) {
  return new extension_Natural(context);
}

;// ../../node_modules/d3-shape/src/curve/step.js
function extension_Step(context, t) {
  this._context = context;
  this._t = t;
}

extension_Step.prototype = {
  areaStart: function() {
    this._line = 0;
  },
  areaEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._x = this._y = NaN;
    this._point = 0;
  },
  lineEnd: function() {
    if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
    if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
  },
  point: function(x, y) {
    x = +x, y = +y;
    switch (this._point) {
      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
      case 1: this._point = 2; // falls through
      default: {
        if (this._t <= 0) {
          this._context.lineTo(this._x, y);
          this._context.lineTo(x, y);
        } else {
          var x1 = this._x * (1 - this._t) + x * this._t;
          this._context.lineTo(x1, this._y);
          this._context.lineTo(x1, y);
        }
        break;
      }
    }
    this._x = x, this._y = y;
  }
};

/* harmony default export */ function extension_step(context) {
  return new extension_Step(context, 0.5);
}

function extension_stepBefore(context) {
  return new extension_Step(context, 0);
}

function extension_stepAfter(context) {
  return new extension_Step(context, 1);
}

;// ../../node_modules/d3-shape/src/constant.js
/* harmony default export */ function extension_src_constant(x) {
  return function constant() {
    return x;
  };
}

;// ../../node_modules/d3-path/src/path.js
const extension_path_pi = Math.PI,
    extension_path_tau = 2 * extension_path_pi,
    extension_path_epsilon = 1e-6,
    extension_tauEpsilon = extension_path_tau - extension_path_epsilon;

function extension_path_append(strings) {
  this._ += strings[0];
  for (let i = 1, n = strings.length; i < n; ++i) {
    this._ += arguments[i] + strings[i];
  }
}

function extension_appendRound(digits) {
  let d = Math.floor(digits);
  if (!(d >= 0)) throw new Error(`invalid digits: ${digits}`);
  if (d > 15) return extension_path_append;
  const k = 10 ** d;
  return function(strings) {
    this._ += strings[0];
    for (let i = 1, n = strings.length; i < n; ++i) {
      this._ += Math.round(arguments[i] * k) / k + strings[i];
    }
  };
}

class extension_Path {
  constructor(digits) {
    this._x0 = this._y0 = // start of current subpath
    this._x1 = this._y1 = null; // end of current subpath
    this._ = "";
    this._append = digits == null ? extension_path_append : extension_appendRound(digits);
  }
  moveTo(x, y) {
    this._append`M${this._x0 = this._x1 = +x},${this._y0 = this._y1 = +y}`;
  }
  closePath() {
    if (this._x1 !== null) {
      this._x1 = this._x0, this._y1 = this._y0;
      this._append`Z`;
    }
  }
  lineTo(x, y) {
    this._append`L${this._x1 = +x},${this._y1 = +y}`;
  }
  quadraticCurveTo(x1, y1, x, y) {
    this._append`Q${+x1},${+y1},${this._x1 = +x},${this._y1 = +y}`;
  }
  bezierCurveTo(x1, y1, x2, y2, x, y) {
    this._append`C${+x1},${+y1},${+x2},${+y2},${this._x1 = +x},${this._y1 = +y}`;
  }
  arcTo(x1, y1, x2, y2, r) {
    x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;

    // Is the radius negative? Error.
    if (r < 0) throw new Error(`negative radius: ${r}`);

    let x0 = this._x1,
        y0 = this._y1,
        x21 = x2 - x1,
        y21 = y2 - y1,
        x01 = x0 - x1,
        y01 = y0 - y1,
        l01_2 = x01 * x01 + y01 * y01;

    // Is this path empty? Move to (x1,y1).
    if (this._x1 === null) {
      this._append`M${this._x1 = x1},${this._y1 = y1}`;
    }

    // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.
    else if (!(l01_2 > extension_path_epsilon));

    // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?
    // Equivalently, is (x1,y1) coincident with (x2,y2)?
    // Or, is the radius zero? Line to (x1,y1).
    else if (!(Math.abs(y01 * x21 - y21 * x01) > extension_path_epsilon) || !r) {
      this._append`L${this._x1 = x1},${this._y1 = y1}`;
    }

    // Otherwise, draw an arc!
    else {
      let x20 = x2 - x0,
          y20 = y2 - y0,
          l21_2 = x21 * x21 + y21 * y21,
          l20_2 = x20 * x20 + y20 * y20,
          l21 = Math.sqrt(l21_2),
          l01 = Math.sqrt(l01_2),
          l = r * Math.tan((extension_path_pi - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),
          t01 = l / l01,
          t21 = l / l21;

      // If the start tangent is not coincident with (x0,y0), line to.
      if (Math.abs(t01 - 1) > extension_path_epsilon) {
        this._append`L${x1 + t01 * x01},${y1 + t01 * y01}`;
      }

      this._append`A${r},${r},0,0,${+(y01 * x20 > x01 * y20)},${this._x1 = x1 + t21 * x21},${this._y1 = y1 + t21 * y21}`;
    }
  }
  arc(x, y, r, a0, a1, ccw) {
    x = +x, y = +y, r = +r, ccw = !!ccw;

    // Is the radius negative? Error.
    if (r < 0) throw new Error(`negative radius: ${r}`);

    let dx = r * Math.cos(a0),
        dy = r * Math.sin(a0),
        x0 = x + dx,
        y0 = y + dy,
        cw = 1 ^ ccw,
        da = ccw ? a0 - a1 : a1 - a0;

    // Is this path empty? Move to (x0,y0).
    if (this._x1 === null) {
      this._append`M${x0},${y0}`;
    }

    // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).
    else if (Math.abs(this._x1 - x0) > extension_path_epsilon || Math.abs(this._y1 - y0) > extension_path_epsilon) {
      this._append`L${x0},${y0}`;
    }

    // Is this arc empty? We’re done.
    if (!r) return;

    // Does the angle go the wrong way? Flip the direction.
    if (da < 0) da = da % extension_path_tau + extension_path_tau;

    // Is this a complete circle? Draw two arcs to complete the circle.
    if (da > extension_tauEpsilon) {
      this._append`A${r},${r},0,1,${cw},${x - dx},${y - dy}A${r},${r},0,1,${cw},${this._x1 = x0},${this._y1 = y0}`;
    }

    // Is this arc non-empty? Draw an arc!
    else if (da > extension_path_epsilon) {
      this._append`A${r},${r},0,${+(da >= extension_path_pi)},${cw},${this._x1 = x + r * Math.cos(a1)},${this._y1 = y + r * Math.sin(a1)}`;
    }
  }
  rect(x, y, w, h) {
    this._append`M${this._x0 = this._x1 = +x},${this._y0 = this._y1 = +y}h${w = +w}v${+h}h${-w}Z`;
  }
  toString() {
    return this._;
  }
}

function extension_path() {
  return new extension_Path;
}

// Allow instanceof d3.path
extension_path.prototype = extension_Path.prototype;

function extension_pathRound(digits = 3) {
  return new extension_Path(+digits);
}

;// ../../node_modules/d3-shape/src/path.js


function extension_withPath(shape) {
  let digits = 3;

  shape.digits = function(_) {
    if (!arguments.length) return digits;
    if (_ == null) {
      digits = null;
    } else {
      const d = Math.floor(_);
      if (!(d >= 0)) throw new RangeError(`invalid digits: ${_}`);
      digits = d;
    }
    return shape;
  };

  return () => new extension_Path(digits);
}

;// ../../node_modules/d3-shape/src/arc.js




function extension_arcInnerRadius(d) {
  return d.innerRadius;
}

function extension_arcOuterRadius(d) {
  return d.outerRadius;
}

function extension_arcStartAngle(d) {
  return d.startAngle;
}

function extension_arcEndAngle(d) {
  return d.endAngle;
}

function extension_arcPadAngle(d) {
  return d && d.padAngle; // Note: optional!
}

function extension_arc_intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
  var x10 = x1 - x0, y10 = y1 - y0,
      x32 = x3 - x2, y32 = y3 - y2,
      t = y32 * x10 - x32 * y10;
  if (t * t < extension_math_epsilon) return;
  t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / t;
  return [x0 + t * x10, y0 + t * y10];
}

// Compute perpendicular offset line of length rc.
// http://mathworld.wolfram.com/Circle-LineIntersection.html
function extension_cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
  var x01 = x0 - x1,
      y01 = y0 - y1,
      lo = (cw ? rc : -rc) / extension_sqrt(x01 * x01 + y01 * y01),
      ox = lo * y01,
      oy = -lo * x01,
      x11 = x0 + ox,
      y11 = y0 + oy,
      x10 = x1 + ox,
      y10 = y1 + oy,
      x00 = (x11 + x10) / 2,
      y00 = (y11 + y10) / 2,
      dx = x10 - x11,
      dy = y10 - y11,
      d2 = dx * dx + dy * dy,
      r = r1 - rc,
      D = x11 * y10 - x10 * y11,
      d = (dy < 0 ? -1 : 1) * extension_sqrt(extension_math_max(0, r * r * d2 - D * D)),
      cx0 = (D * dy - dx * d) / d2,
      cy0 = (-D * dx - dy * d) / d2,
      cx1 = (D * dy + dx * d) / d2,
      cy1 = (-D * dx + dy * d) / d2,
      dx0 = cx0 - x00,
      dy0 = cy0 - y00,
      dx1 = cx1 - x00,
      dy1 = cy1 - y00;

  // Pick the closer of the two intersection points.
  // TODO Is there a faster way to determine which intersection to use?
  if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;

  return {
    cx: cx0,
    cy: cy0,
    x01: -ox,
    y01: -oy,
    x11: cx0 * (r1 / r - 1),
    y11: cy0 * (r1 / r - 1)
  };
}

/* harmony default export */ function extension_arc() {
  var innerRadius = extension_arcInnerRadius,
      outerRadius = extension_arcOuterRadius,
      cornerRadius = extension_src_constant(0),
      padRadius = null,
      startAngle = extension_arcStartAngle,
      endAngle = extension_arcEndAngle,
      padAngle = extension_arcPadAngle,
      context = null,
      path = extension_withPath(arc);

  function arc() {
    var buffer,
        r,
        r0 = +innerRadius.apply(this, arguments),
        r1 = +outerRadius.apply(this, arguments),
        a0 = startAngle.apply(this, arguments) - extension_halfPi,
        a1 = endAngle.apply(this, arguments) - extension_halfPi,
        da = extension_abs(a1 - a0),
        cw = a1 > a0;

    if (!context) context = buffer = path();

    // Ensure that the outer radius is always larger than the inner radius.
    if (r1 < r0) r = r1, r1 = r0, r0 = r;

    // Is it a point?
    if (!(r1 > extension_math_epsilon)) context.moveTo(0, 0);

    // Or is it a circle or annulus?
    else if (da > extension_tau - extension_math_epsilon) {
      context.moveTo(r1 * extension_cos(a0), r1 * extension_sin(a0));
      context.arc(0, 0, r1, a0, a1, !cw);
      if (r0 > extension_math_epsilon) {
        context.moveTo(r0 * extension_cos(a1), r0 * extension_sin(a1));
        context.arc(0, 0, r0, a1, a0, cw);
      }
    }

    // Or is it a circular or annular sector?
    else {
      var a01 = a0,
          a11 = a1,
          a00 = a0,
          a10 = a1,
          da0 = da,
          da1 = da,
          ap = padAngle.apply(this, arguments) / 2,
          rp = (ap > extension_math_epsilon) && (padRadius ? +padRadius.apply(this, arguments) : extension_sqrt(r0 * r0 + r1 * r1)),
          rc = extension_math_min(extension_abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
          rc0 = rc,
          rc1 = rc,
          t0,
          t1;

      // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
      if (rp > extension_math_epsilon) {
        var p0 = extension_asin(rp / r0 * extension_sin(ap)),
            p1 = extension_asin(rp / r1 * extension_sin(ap));
        if ((da0 -= p0 * 2) > extension_math_epsilon) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;
        else da0 = 0, a00 = a10 = (a0 + a1) / 2;
        if ((da1 -= p1 * 2) > extension_math_epsilon) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;
        else da1 = 0, a01 = a11 = (a0 + a1) / 2;
      }

      var x01 = r1 * extension_cos(a01),
          y01 = r1 * extension_sin(a01),
          x10 = r0 * extension_cos(a10),
          y10 = r0 * extension_sin(a10);

      // Apply rounded corners?
      if (rc > extension_math_epsilon) {
        var x11 = r1 * extension_cos(a11),
            y11 = r1 * extension_sin(a11),
            x00 = r0 * extension_cos(a00),
            y00 = r0 * extension_sin(a00),
            oc;

        // Restrict the corner radius according to the sector angle. If this
        // intersection fails, it’s probably because the arc is too small, so
        // disable the corner radius entirely.
        if (da < extension_pi) {
          if (oc = extension_arc_intersect(x01, y01, x00, y00, x11, y11, x10, y10)) {
            var ax = x01 - oc[0],
                ay = y01 - oc[1],
                bx = x11 - oc[0],
                by = y11 - oc[1],
                kc = 1 / extension_sin(extension_acos((ax * bx + ay * by) / (extension_sqrt(ax * ax + ay * ay) * extension_sqrt(bx * bx + by * by))) / 2),
                lc = extension_sqrt(oc[0] * oc[0] + oc[1] * oc[1]);
            rc0 = extension_math_min(rc, (r0 - lc) / (kc - 1));
            rc1 = extension_math_min(rc, (r1 - lc) / (kc + 1));
          } else {
            rc0 = rc1 = 0;
          }
        }
      }

      // Is the sector collapsed to a line?
      if (!(da1 > extension_math_epsilon)) context.moveTo(x01, y01);

      // Does the sector’s outer ring have rounded corners?
      else if (rc1 > extension_math_epsilon) {
        t0 = extension_cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
        t1 = extension_cornerTangents(x11, y11, x10, y10, r1, rc1, cw);

        context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);

        // Have the corners merged?
        if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, extension_atan2(t0.y01, t0.x01), extension_atan2(t1.y01, t1.x01), !cw);

        // Otherwise, draw the two corners and the ring.
        else {
          context.arc(t0.cx, t0.cy, rc1, extension_atan2(t0.y01, t0.x01), extension_atan2(t0.y11, t0.x11), !cw);
          context.arc(0, 0, r1, extension_atan2(t0.cy + t0.y11, t0.cx + t0.x11), extension_atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
          context.arc(t1.cx, t1.cy, rc1, extension_atan2(t1.y11, t1.x11), extension_atan2(t1.y01, t1.x01), !cw);
        }
      }

      // Or is the outer ring just a circular arc?
      else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);

      // Is there no inner ring, and it’s a circular sector?
      // Or perhaps it’s an annular sector collapsed due to padding?
      if (!(r0 > extension_math_epsilon) || !(da0 > extension_math_epsilon)) context.lineTo(x10, y10);

      // Does the sector’s inner ring (or point) have rounded corners?
      else if (rc0 > extension_math_epsilon) {
        t0 = extension_cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
        t1 = extension_cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);

        context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);

        // Have the corners merged?
        if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, extension_atan2(t0.y01, t0.x01), extension_atan2(t1.y01, t1.x01), !cw);

        // Otherwise, draw the two corners and the ring.
        else {
          context.arc(t0.cx, t0.cy, rc0, extension_atan2(t0.y01, t0.x01), extension_atan2(t0.y11, t0.x11), !cw);
          context.arc(0, 0, r0, extension_atan2(t0.cy + t0.y11, t0.cx + t0.x11), extension_atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw);
          context.arc(t1.cx, t1.cy, rc0, extension_atan2(t1.y11, t1.x11), extension_atan2(t1.y01, t1.x01), !cw);
        }
      }

      // Or is the inner ring just a circular arc?
      else context.arc(0, 0, r0, a10, a00, cw);
    }

    context.closePath();

    if (buffer) return context = null, buffer + "" || null;
  }

  arc.centroid = function() {
    var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
        a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - extension_pi / 2;
    return [extension_cos(a) * r, extension_sin(a) * r];
  };

  arc.innerRadius = function(_) {
    return arguments.length ? (innerRadius = typeof _ === "function" ? _ : extension_src_constant(+_), arc) : innerRadius;
  };

  arc.outerRadius = function(_) {
    return arguments.length ? (outerRadius = typeof _ === "function" ? _ : extension_src_constant(+_), arc) : outerRadius;
  };

  arc.cornerRadius = function(_) {
    return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : extension_src_constant(+_), arc) : cornerRadius;
  };

  arc.padRadius = function(_) {
    return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : extension_src_constant(+_), arc) : padRadius;
  };

  arc.startAngle = function(_) {
    return arguments.length ? (startAngle = typeof _ === "function" ? _ : extension_src_constant(+_), arc) : startAngle;
  };

  arc.endAngle = function(_) {
    return arguments.length ? (endAngle = typeof _ === "function" ? _ : extension_src_constant(+_), arc) : endAngle;
  };

  arc.padAngle = function(_) {
    return arguments.length ? (padAngle = typeof _ === "function" ? _ : extension_src_constant(+_), arc) : padAngle;
  };

  arc.context = function(_) {
    return arguments.length ? ((context = _ == null ? null : _), arc) : context;
  };

  return arc;
}

;// ../../node_modules/d3-shape/src/array.js
var extension_array_slice = Array.prototype.slice;

/* harmony default export */ function extension_src_array(x) {
  return typeof x === "object" && "length" in x
    ? x // Array, TypedArray, NodeList, array-like
    : Array.from(x); // Map, Set, iterable, string, or anything else
}

;// ../../node_modules/d3-shape/src/point.js
function extension_point_x(p) {
  return p[0];
}

function extension_point_y(p) {
  return p[1];
}

;// ../../node_modules/d3-shape/src/line.js






/* harmony default export */ function extension_line(x, y) {
  var defined = extension_src_constant(true),
      context = null,
      curve = extension_curve_linear,
      output = null,
      path = extension_withPath(line);

  x = typeof x === "function" ? x : (x === undefined) ? extension_point_x : extension_src_constant(x);
  y = typeof y === "function" ? y : (y === undefined) ? extension_point_y : extension_src_constant(y);

  function line(data) {
    var i,
        n = (data = extension_src_array(data)).length,
        d,
        defined0 = false,
        buffer;

    if (context == null) output = curve(buffer = path());

    for (i = 0; i <= n; ++i) {
      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
        if (defined0 = !defined0) output.lineStart();
        else output.lineEnd();
      }
      if (defined0) output.point(+x(d, i, data), +y(d, i, data));
    }

    if (buffer) return output = null, buffer + "" || null;
  }

  line.x = function(_) {
    return arguments.length ? (x = typeof _ === "function" ? _ : extension_src_constant(+_), line) : x;
  };

  line.y = function(_) {
    return arguments.length ? (y = typeof _ === "function" ? _ : extension_src_constant(+_), line) : y;
  };

  line.defined = function(_) {
    return arguments.length ? (defined = typeof _ === "function" ? _ : extension_src_constant(!!_), line) : defined;
  };

  line.curve = function(_) {
    return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
  };

  line.context = function(_) {
    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
  };

  return line;
}

;// ../../node_modules/d3-shape/src/area.js







/* harmony default export */ function extension_src_area(x0, y0, y1) {
  var x1 = null,
      defined = extension_src_constant(true),
      context = null,
      curve = extension_curve_linear,
      output = null,
      path = extension_withPath(area);

  x0 = typeof x0 === "function" ? x0 : (x0 === undefined) ? extension_point_x : extension_src_constant(+x0);
  y0 = typeof y0 === "function" ? y0 : (y0 === undefined) ? extension_src_constant(0) : extension_src_constant(+y0);
  y1 = typeof y1 === "function" ? y1 : (y1 === undefined) ? extension_point_y : extension_src_constant(+y1);

  function area(data) {
    var i,
        j,
        k,
        n = (data = extension_src_array(data)).length,
        d,
        defined0 = false,
        buffer,
        x0z = new Array(n),
        y0z = new Array(n);

    if (context == null) output = curve(buffer = path());

    for (i = 0; i <= n; ++i) {
      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
        if (defined0 = !defined0) {
          j = i;
          output.areaStart();
          output.lineStart();
        } else {
          output.lineEnd();
          output.lineStart();
          for (k = i - 1; k >= j; --k) {
            output.point(x0z[k], y0z[k]);
          }
          output.lineEnd();
          output.areaEnd();
        }
      }
      if (defined0) {
        x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
        output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
      }
    }

    if (buffer) return output = null, buffer + "" || null;
  }

  function arealine() {
    return extension_line().defined(defined).curve(curve).context(context);
  }

  area.x = function(_) {
    return arguments.length ? (x0 = typeof _ === "function" ? _ : extension_src_constant(+_), x1 = null, area) : x0;
  };

  area.x0 = function(_) {
    return arguments.length ? (x0 = typeof _ === "function" ? _ : extension_src_constant(+_), area) : x0;
  };

  area.x1 = function(_) {
    return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : extension_src_constant(+_), area) : x1;
  };

  area.y = function(_) {
    return arguments.length ? (y0 = typeof _ === "function" ? _ : extension_src_constant(+_), y1 = null, area) : y0;
  };

  area.y0 = function(_) {
    return arguments.length ? (y0 = typeof _ === "function" ? _ : extension_src_constant(+_), area) : y0;
  };

  area.y1 = function(_) {
    return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : extension_src_constant(+_), area) : y1;
  };

  area.lineX0 =
  area.lineY0 = function() {
    return arealine().x(x0).y(y0);
  };

  area.lineY1 = function() {
    return arealine().x(x0).y(y1);
  };

  area.lineX1 = function() {
    return arealine().x(x1).y(y0);
  };

  area.defined = function(_) {
    return arguments.length ? (defined = typeof _ === "function" ? _ : extension_src_constant(!!_), area) : defined;
  };

  area.curve = function(_) {
    return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
  };

  area.context = function(_) {
    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
  };

  return area;
}

;// ../../node_modules/d3-shape/src/symbol/asterisk.js


const extension_sqrt3 = extension_sqrt(3);

/* harmony default export */ const extension_asterisk = ({
  draw(context, size) {
    const r = extension_sqrt(size + extension_math_min(size / 28, 0.75)) * 0.59436;
    const t = r / 2;
    const u = t * extension_sqrt3;
    context.moveTo(0, r);
    context.lineTo(0, -r);
    context.moveTo(-u, -t);
    context.lineTo(u, t);
    context.moveTo(-u, t);
    context.lineTo(u, -t);
  }
});

;// ../../node_modules/d3-shape/src/symbol/circle.js


/* harmony default export */ const extension_circle = ({
  draw(context, size) {
    const r = extension_sqrt(size / extension_pi);
    context.moveTo(r, 0);
    context.arc(0, 0, r, 0, extension_tau);
  }
});

;// ../../node_modules/d3-shape/src/symbol/cross.js


/* harmony default export */ const extension_symbol_cross = ({
  draw(context, size) {
    const r = extension_sqrt(size / 5) / 2;
    context.moveTo(-3 * r, -r);
    context.lineTo(-r, -r);
    context.lineTo(-r, -3 * r);
    context.lineTo(r, -3 * r);
    context.lineTo(r, -r);
    context.lineTo(3 * r, -r);
    context.lineTo(3 * r, r);
    context.lineTo(r, r);
    context.lineTo(r, 3 * r);
    context.lineTo(-r, 3 * r);
    context.lineTo(-r, r);
    context.lineTo(-3 * r, r);
    context.closePath();
  }
});

;// ../../node_modules/d3-shape/src/symbol/diamond.js


const extension_tan30 = extension_sqrt(1 / 3);
const extension_tan30_2 = extension_tan30 * 2;

/* harmony default export */ const extension_diamond = ({
  draw(context, size) {
    const y = extension_sqrt(size / extension_tan30_2);
    const x = y * extension_tan30;
    context.moveTo(0, -y);
    context.lineTo(x, 0);
    context.lineTo(0, y);
    context.lineTo(-x, 0);
    context.closePath();
  }
});

;// ../../node_modules/d3-shape/src/symbol/diamond2.js


/* harmony default export */ const extension_diamond2 = ({
  draw(context, size) {
    const r = extension_sqrt(size) * 0.62625;
    context.moveTo(0, -r);
    context.lineTo(r, 0);
    context.lineTo(0, r);
    context.lineTo(-r, 0);
    context.closePath();
  }
});

;// ../../node_modules/d3-shape/src/symbol/plus.js


/* harmony default export */ const extension_plus = ({
  draw(context, size) {
    const r = extension_sqrt(size - extension_math_min(size / 7, 2)) * 0.87559;
    context.moveTo(-r, 0);
    context.lineTo(r, 0);
    context.moveTo(0, r);
    context.lineTo(0, -r);
  }
});

;// ../../node_modules/d3-shape/src/symbol/square.js


/* harmony default export */ const extension_square = ({
  draw(context, size) {
    const w = extension_sqrt(size);
    const x = -w / 2;
    context.rect(x, x, w, w);
  }
});

;// ../../node_modules/d3-shape/src/symbol/square2.js


/* harmony default export */ const extension_square2 = ({
  draw(context, size) {
    const r = extension_sqrt(size) * 0.4431;
    context.moveTo(r, r);
    context.lineTo(r, -r);
    context.lineTo(-r, -r);
    context.lineTo(-r, r);
    context.closePath();
  }
});

;// ../../node_modules/d3-shape/src/symbol/star.js


const extension_ka = 0.89081309152928522810;
const extension_kr = extension_sin(extension_pi / 10) / extension_sin(7 * extension_pi / 10);
const extension_kx = extension_sin(extension_tau / 10) * extension_kr;
const extension_ky = -extension_cos(extension_tau / 10) * extension_kr;

/* harmony default export */ const extension_star = ({
  draw(context, size) {
    const r = extension_sqrt(size * extension_ka);
    const x = extension_kx * r;
    const y = extension_ky * r;
    context.moveTo(0, -r);
    context.lineTo(x, y);
    for (let i = 1; i < 5; ++i) {
      const a = extension_tau * i / 5;
      const c = extension_cos(a);
      const s = extension_sin(a);
      context.lineTo(s * r, -c * r);
      context.lineTo(c * x - s * y, s * x + c * y);
    }
    context.closePath();
  }
});

;// ../../node_modules/d3-shape/src/symbol/triangle.js


const extension_triangle_sqrt3 = extension_sqrt(3);

/* harmony default export */ const extension_triangle = ({
  draw(context, size) {
    const y = -extension_sqrt(size / (extension_triangle_sqrt3 * 3));
    context.moveTo(0, y * 2);
    context.lineTo(-extension_triangle_sqrt3 * y, -y);
    context.lineTo(extension_triangle_sqrt3 * y, -y);
    context.closePath();
  }
});

;// ../../node_modules/d3-shape/src/symbol/triangle2.js


const extension_triangle2_sqrt3 = extension_sqrt(3);

/* harmony default export */ const extension_triangle2 = ({
  draw(context, size) {
    const s = extension_sqrt(size) * 0.6824;
    const t = s  / 2;
    const u = (s * extension_triangle2_sqrt3) / 2; // cos(Math.PI / 6)
    context.moveTo(0, -s);
    context.lineTo(u, t);
    context.lineTo(-u, t);
    context.closePath();
  }
});

;// ../../node_modules/d3-shape/src/symbol/wye.js


const extension_c = -0.5;
const extension_s = extension_sqrt(3) / 2;
const extension_k = 1 / extension_sqrt(12);
const extension_a = (extension_k / 2 + 1) * 3;

/* harmony default export */ const extension_wye = ({
  draw(context, size) {
    const r = extension_sqrt(size / extension_a);
    const x0 = r / 2, y0 = r * extension_k;
    const x1 = x0, y1 = r * extension_k + r;
    const x2 = -x1, y2 = y1;
    context.moveTo(x0, y0);
    context.lineTo(x1, y1);
    context.lineTo(x2, y2);
    context.lineTo(extension_c * x0 - extension_s * y0, extension_s * x0 + extension_c * y0);
    context.lineTo(extension_c * x1 - extension_s * y1, extension_s * x1 + extension_c * y1);
    context.lineTo(extension_c * x2 - extension_s * y2, extension_s * x2 + extension_c * y2);
    context.lineTo(extension_c * x0 + extension_s * y0, extension_c * y0 - extension_s * x0);
    context.lineTo(extension_c * x1 + extension_s * y1, extension_c * y1 - extension_s * x1);
    context.lineTo(extension_c * x2 + extension_s * y2, extension_c * y2 - extension_s * x2);
    context.closePath();
  }
});

;// ../../node_modules/d3-shape/src/symbol/times.js


/* harmony default export */ const extension_times = ({
  draw(context, size) {
    const r = extension_sqrt(size - extension_math_min(size / 6, 1.7)) * 0.6189;
    context.moveTo(-r, -r);
    context.lineTo(r, r);
    context.moveTo(-r, r);
    context.lineTo(r, -r);
  }
});

;// ../../node_modules/d3-shape/src/symbol.js
















// These symbols are designed to be filled.
const extension_symbolsFill = [
  extension_circle,
  extension_symbol_cross,
  extension_diamond,
  extension_square,
  extension_star,
  extension_triangle,
  extension_wye
];

// These symbols are designed to be stroked (with a width of 1.5px and round caps).
const extension_symbolsStroke = [
  extension_circle,
  extension_plus,
  extension_times,
  extension_triangle2,
  extension_asterisk,
  extension_square2,
  extension_diamond2
];

function extension_symbol_Symbol(type, size) {
  let context = null,
      path = extension_withPath(symbol);

  type = typeof type === "function" ? type : extension_src_constant(type || extension_circle);
  size = typeof size === "function" ? size : extension_src_constant(size === undefined ? 64 : +size);

  function symbol() {
    let buffer;
    if (!context) context = buffer = path();
    type.apply(this, arguments).draw(context, +size.apply(this, arguments));
    if (buffer) return context = null, buffer + "" || null;
  }

  symbol.type = function(_) {
    return arguments.length ? (type = typeof _ === "function" ? _ : extension_src_constant(_), symbol) : type;
  };

  symbol.size = function(_) {
    return arguments.length ? (size = typeof _ === "function" ? _ : extension_src_constant(+_), symbol) : size;
  };

  symbol.context = function(_) {
    return arguments.length ? (context = _ == null ? null : _, symbol) : context;
  };

  return symbol;
}

;// ../../node_modules/vega-canvas/build/vega-canvas.browser.module.js
function extension_domCanvas(w, h) {
  if (typeof document !== 'undefined' && document.createElement) {
    const c = document.createElement('canvas');
    if (c && c.getContext) {
      c.width = w;
      c.height = h;
      return c;
    }
  }
  return null;
}
const extension_domImage = () => typeof Image !== 'undefined' ? Image : null;



;// ../../node_modules/d3-array/src/bisect.js




const extension_ascendingBisect = extension_bisector_bisector(extension_ascending_ascending);
const extension_bisectRight = extension_ascendingBisect.right;
const extension_bisectLeft = extension_ascendingBisect.left;
const extension_bisectCenter = extension_bisector_bisector(extension_number_number).center;
/* harmony default export */ const extension_src_bisect = (extension_bisectRight);

;// ../../node_modules/d3-color/src/define.js
/* harmony default export */ function extension_src_define(constructor, factory, prototype) {
  constructor.prototype = factory.prototype = prototype;
  prototype.constructor = constructor;
}

function extension_define_extend(parent, definition) {
  var prototype = Object.create(parent.prototype);
  for (var key in definition) prototype[key] = definition[key];
  return prototype;
}

;// ../../node_modules/d3-color/src/color.js


function extension_Color() {}

var extension_darker = 0.7;
var extension_brighter = 1 / extension_darker;

var extension_reI = "\\s*([+-]?\\d+)\\s*",
    extension_reN = "\\s*([+-]?(?:\\d*\\.)?\\d+(?:[eE][+-]?\\d+)?)\\s*",
    extension_reP = "\\s*([+-]?(?:\\d*\\.)?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
    extension_reHex = /^#([0-9a-f]{3,8})$/,
    extension_reRgbInteger = new RegExp(`^rgb\\(${extension_reI},${extension_reI},${extension_reI}\\)$`),
    extension_reRgbPercent = new RegExp(`^rgb\\(${extension_reP},${extension_reP},${extension_reP}\\)$`),
    extension_reRgbaInteger = new RegExp(`^rgba\\(${extension_reI},${extension_reI},${extension_reI},${extension_reN}\\)$`),
    extension_reRgbaPercent = new RegExp(`^rgba\\(${extension_reP},${extension_reP},${extension_reP},${extension_reN}\\)$`),
    extension_reHslPercent = new RegExp(`^hsl\\(${extension_reN},${extension_reP},${extension_reP}\\)$`),
    extension_reHslaPercent = new RegExp(`^hsla\\(${extension_reN},${extension_reP},${extension_reP},${extension_reN}\\)$`);

var extension_named = {
  aliceblue: 0xf0f8ff,
  antiquewhite: 0xfaebd7,
  aqua: 0x00ffff,
  aquamarine: 0x7fffd4,
  azure: 0xf0ffff,
  beige: 0xf5f5dc,
  bisque: 0xffe4c4,
  black: 0x000000,
  blanchedalmond: 0xffebcd,
  blue: 0x0000ff,
  blueviolet: 0x8a2be2,
  brown: 0xa52a2a,
  burlywood: 0xdeb887,
  cadetblue: 0x5f9ea0,
  chartreuse: 0x7fff00,
  chocolate: 0xd2691e,
  coral: 0xff7f50,
  cornflowerblue: 0x6495ed,
  cornsilk: 0xfff8dc,
  crimson: 0xdc143c,
  cyan: 0x00ffff,
  darkblue: 0x00008b,
  darkcyan: 0x008b8b,
  darkgoldenrod: 0xb8860b,
  darkgray: 0xa9a9a9,
  darkgreen: 0x006400,
  darkgrey: 0xa9a9a9,
  darkkhaki: 0xbdb76b,
  darkmagenta: 0x8b008b,
  darkolivegreen: 0x556b2f,
  darkorange: 0xff8c00,
  darkorchid: 0x9932cc,
  darkred: 0x8b0000,
  darksalmon: 0xe9967a,
  darkseagreen: 0x8fbc8f,
  darkslateblue: 0x483d8b,
  darkslategray: 0x2f4f4f,
  darkslategrey: 0x2f4f4f,
  darkturquoise: 0x00ced1,
  darkviolet: 0x9400d3,
  deeppink: 0xff1493,
  deepskyblue: 0x00bfff,
  dimgray: 0x696969,
  dimgrey: 0x696969,
  dodgerblue: 0x1e90ff,
  firebrick: 0xb22222,
  floralwhite: 0xfffaf0,
  forestgreen: 0x228b22,
  fuchsia: 0xff00ff,
  gainsboro: 0xdcdcdc,
  ghostwhite: 0xf8f8ff,
  gold: 0xffd700,
  goldenrod: 0xdaa520,
  gray: 0x808080,
  green: 0x008000,
  greenyellow: 0xadff2f,
  grey: 0x808080,
  honeydew: 0xf0fff0,
  hotpink: 0xff69b4,
  indianred: 0xcd5c5c,
  indigo: 0x4b0082,
  ivory: 0xfffff0,
  khaki: 0xf0e68c,
  lavender: 0xe6e6fa,
  lavenderblush: 0xfff0f5,
  lawngreen: 0x7cfc00,
  lemonchiffon: 0xfffacd,
  lightblue: 0xadd8e6,
  lightcoral: 0xf08080,
  lightcyan: 0xe0ffff,
  lightgoldenrodyellow: 0xfafad2,
  lightgray: 0xd3d3d3,
  lightgreen: 0x90ee90,
  lightgrey: 0xd3d3d3,
  lightpink: 0xffb6c1,
  lightsalmon: 0xffa07a,
  lightseagreen: 0x20b2aa,
  lightskyblue: 0x87cefa,
  lightslategray: 0x778899,
  lightslategrey: 0x778899,
  lightsteelblue: 0xb0c4de,
  lightyellow: 0xffffe0,
  lime: 0x00ff00,
  limegreen: 0x32cd32,
  linen: 0xfaf0e6,
  magenta: 0xff00ff,
  maroon: 0x800000,
  mediumaquamarine: 0x66cdaa,
  mediumblue: 0x0000cd,
  mediumorchid: 0xba55d3,
  mediumpurple: 0x9370db,
  mediumseagreen: 0x3cb371,
  mediumslateblue: 0x7b68ee,
  mediumspringgreen: 0x00fa9a,
  mediumturquoise: 0x48d1cc,
  mediumvioletred: 0xc71585,
  midnightblue: 0x191970,
  mintcream: 0xf5fffa,
  mistyrose: 0xffe4e1,
  moccasin: 0xffe4b5,
  navajowhite: 0xffdead,
  navy: 0x000080,
  oldlace: 0xfdf5e6,
  olive: 0x808000,
  olivedrab: 0x6b8e23,
  orange: 0xffa500,
  orangered: 0xff4500,
  orchid: 0xda70d6,
  palegoldenrod: 0xeee8aa,
  palegreen: 0x98fb98,
  paleturquoise: 0xafeeee,
  palevioletred: 0xdb7093,
  papayawhip: 0xffefd5,
  peachpuff: 0xffdab9,
  peru: 0xcd853f,
  pink: 0xffc0cb,
  plum: 0xdda0dd,
  powderblue: 0xb0e0e6,
  purple: 0x800080,
  rebeccapurple: 0x663399,
  red: 0xff0000,
  rosybrown: 0xbc8f8f,
  royalblue: 0x4169e1,
  saddlebrown: 0x8b4513,
  salmon: 0xfa8072,
  sandybrown: 0xf4a460,
  seagreen: 0x2e8b57,
  seashell: 0xfff5ee,
  sienna: 0xa0522d,
  silver: 0xc0c0c0,
  skyblue: 0x87ceeb,
  slateblue: 0x6a5acd,
  slategray: 0x708090,
  slategrey: 0x708090,
  snow: 0xfffafa,
  springgreen: 0x00ff7f,
  steelblue: 0x4682b4,
  tan: 0xd2b48c,
  teal: 0x008080,
  thistle: 0xd8bfd8,
  tomato: 0xff6347,
  turquoise: 0x40e0d0,
  violet: 0xee82ee,
  wheat: 0xf5deb3,
  white: 0xffffff,
  whitesmoke: 0xf5f5f5,
  yellow: 0xffff00,
  yellowgreen: 0x9acd32
};

extension_src_define(extension_Color, extension_color, {
  copy(channels) {
    return Object.assign(new this.constructor, this, channels);
  },
  displayable() {
    return this.rgb().displayable();
  },
  hex: extension_color_formatHex, // Deprecated! Use color.formatHex.
  formatHex: extension_color_formatHex,
  formatHex8: extension_color_formatHex8,
  formatHsl: extension_color_formatHsl,
  formatRgb: extension_color_formatRgb,
  toString: extension_color_formatRgb
});

function extension_color_formatHex() {
  return this.rgb().formatHex();
}

function extension_color_formatHex8() {
  return this.rgb().formatHex8();
}

function extension_color_formatHsl() {
  return extension_hslConvert(this).formatHsl();
}

function extension_color_formatRgb() {
  return this.rgb().formatRgb();
}

function extension_color(format) {
  var m, l;
  format = (format + "").trim().toLowerCase();
  return (m = extension_reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? extension_rgbn(m) // #ff0000
      : l === 3 ? new extension_Rgb((m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1) // #f00
      : l === 8 ? extension_rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
      : l === 4 ? extension_rgba((m >> 12 & 0xf) | (m >> 8 & 0xf0), (m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), (((m & 0xf) << 4) | (m & 0xf)) / 0xff) // #f000
      : null) // invalid hex
      : (m = extension_reRgbInteger.exec(format)) ? new extension_Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
      : (m = extension_reRgbPercent.exec(format)) ? new extension_Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
      : (m = extension_reRgbaInteger.exec(format)) ? extension_rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
      : (m = extension_reRgbaPercent.exec(format)) ? extension_rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
      : (m = extension_reHslPercent.exec(format)) ? extension_hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
      : (m = extension_reHslaPercent.exec(format)) ? extension_hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
      : extension_named.hasOwnProperty(format) ? extension_rgbn(extension_named[format]) // eslint-disable-line no-prototype-builtins
      : format === "transparent" ? new extension_Rgb(NaN, NaN, NaN, 0)
      : null;
}

function extension_rgbn(n) {
  return new extension_Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
}

function extension_rgba(r, g, b, a) {
  if (a <= 0) r = g = b = NaN;
  return new extension_Rgb(r, g, b, a);
}

function extension_rgbConvert(o) {
  if (!(o instanceof extension_Color)) o = extension_color(o);
  if (!o) return new extension_Rgb;
  o = o.rgb();
  return new extension_Rgb(o.r, o.g, o.b, o.opacity);
}

function extension_color_rgb(r, g, b, opacity) {
  return arguments.length === 1 ? extension_rgbConvert(r) : new extension_Rgb(r, g, b, opacity == null ? 1 : opacity);
}

function extension_Rgb(r, g, b, opacity) {
  this.r = +r;
  this.g = +g;
  this.b = +b;
  this.opacity = +opacity;
}

extension_src_define(extension_Rgb, extension_color_rgb, extension_define_extend(extension_Color, {
  brighter(k) {
    k = k == null ? extension_brighter : Math.pow(extension_brighter, k);
    return new extension_Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
  },
  darker(k) {
    k = k == null ? extension_darker : Math.pow(extension_darker, k);
    return new extension_Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
  },
  rgb() {
    return this;
  },
  clamp() {
    return new extension_Rgb(extension_clampi(this.r), extension_clampi(this.g), extension_clampi(this.b), extension_clampa(this.opacity));
  },
  displayable() {
    return (-0.5 <= this.r && this.r < 255.5)
        && (-0.5 <= this.g && this.g < 255.5)
        && (-0.5 <= this.b && this.b < 255.5)
        && (0 <= this.opacity && this.opacity <= 1);
  },
  hex: extension_rgb_formatHex, // Deprecated! Use color.formatHex.
  formatHex: extension_rgb_formatHex,
  formatHex8: extension_rgb_formatHex8,
  formatRgb: extension_rgb_formatRgb,
  toString: extension_rgb_formatRgb
}));

function extension_rgb_formatHex() {
  return `#${extension_hex(this.r)}${extension_hex(this.g)}${extension_hex(this.b)}`;
}

function extension_rgb_formatHex8() {
  return `#${extension_hex(this.r)}${extension_hex(this.g)}${extension_hex(this.b)}${extension_hex((isNaN(this.opacity) ? 1 : this.opacity) * 255)}`;
}

function extension_rgb_formatRgb() {
  const a = extension_clampa(this.opacity);
  return `${a === 1 ? "rgb(" : "rgba("}${extension_clampi(this.r)}, ${extension_clampi(this.g)}, ${extension_clampi(this.b)}${a === 1 ? ")" : `, ${a})`}`;
}

function extension_clampa(opacity) {
  return isNaN(opacity) ? 1 : Math.max(0, Math.min(1, opacity));
}

function extension_clampi(value) {
  return Math.max(0, Math.min(255, Math.round(value) || 0));
}

function extension_hex(value) {
  value = extension_clampi(value);
  return (value < 16 ? "0" : "") + value.toString(16);
}

function extension_hsla(h, s, l, a) {
  if (a <= 0) h = s = l = NaN;
  else if (l <= 0 || l >= 1) h = s = NaN;
  else if (s <= 0) h = NaN;
  return new extension_Hsl(h, s, l, a);
}

function extension_hslConvert(o) {
  if (o instanceof extension_Hsl) return new extension_Hsl(o.h, o.s, o.l, o.opacity);
  if (!(o instanceof extension_Color)) o = extension_color(o);
  if (!o) return new extension_Hsl;
  if (o instanceof extension_Hsl) return o;
  o = o.rgb();
  var r = o.r / 255,
      g = o.g / 255,
      b = o.b / 255,
      min = Math.min(r, g, b),
      max = Math.max(r, g, b),
      h = NaN,
      s = max - min,
      l = (max + min) / 2;
  if (s) {
    if (r === max) h = (g - b) / s + (g < b) * 6;
    else if (g === max) h = (b - r) / s + 2;
    else h = (r - g) / s + 4;
    s /= l < 0.5 ? max + min : 2 - max - min;
    h *= 60;
  } else {
    s = l > 0 && l < 1 ? 0 : h;
  }
  return new extension_Hsl(h, s, l, o.opacity);
}

function extension_hsl(h, s, l, opacity) {
  return arguments.length === 1 ? extension_hslConvert(h) : new extension_Hsl(h, s, l, opacity == null ? 1 : opacity);
}

function extension_Hsl(h, s, l, opacity) {
  this.h = +h;
  this.s = +s;
  this.l = +l;
  this.opacity = +opacity;
}

extension_src_define(extension_Hsl, extension_hsl, extension_define_extend(extension_Color, {
  brighter(k) {
    k = k == null ? extension_brighter : Math.pow(extension_brighter, k);
    return new extension_Hsl(this.h, this.s, this.l * k, this.opacity);
  },
  darker(k) {
    k = k == null ? extension_darker : Math.pow(extension_darker, k);
    return new extension_Hsl(this.h, this.s, this.l * k, this.opacity);
  },
  rgb() {
    var h = this.h % 360 + (this.h < 0) * 360,
        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
        l = this.l,
        m2 = l + (l < 0.5 ? l : 1 - l) * s,
        m1 = 2 * l - m2;
    return new extension_Rgb(
      extension_hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
      extension_hsl2rgb(h, m1, m2),
      extension_hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
      this.opacity
    );
  },
  clamp() {
    return new extension_Hsl(extension_clamph(this.h), extension_clampt(this.s), extension_clampt(this.l), extension_clampa(this.opacity));
  },
  displayable() {
    return (0 <= this.s && this.s <= 1 || isNaN(this.s))
        && (0 <= this.l && this.l <= 1)
        && (0 <= this.opacity && this.opacity <= 1);
  },
  formatHsl() {
    const a = extension_clampa(this.opacity);
    return `${a === 1 ? "hsl(" : "hsla("}${extension_clamph(this.h)}, ${extension_clampt(this.s) * 100}%, ${extension_clampt(this.l) * 100}%${a === 1 ? ")" : `, ${a})`}`;
  }
}));

function extension_clamph(value) {
  value = (value || 0) % 360;
  return value < 0 ? value + 360 : value;
}

function extension_clampt(value) {
  return Math.max(0, Math.min(1, value || 0));
}

/* From FvD 13.37, CSS Color Module Level 3 */
function extension_hsl2rgb(h, m1, m2) {
  return (h < 60 ? m1 + (m2 - m1) * h / 60
      : h < 180 ? m2
      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
      : m1) * 255;
}

;// ../../node_modules/d3-interpolate/src/basis.js
function extension_basis_basis(t1, v0, v1, v2, v3) {
  var t2 = t1 * t1, t3 = t2 * t1;
  return ((1 - 3 * t1 + 3 * t2 - t3) * v0
      + (4 - 6 * t2 + 3 * t3) * v1
      + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2
      + t3 * v3) / 6;
}

/* harmony default export */ function extension_src_basis(values) {
  var n = values.length - 1;
  return function(t) {
    var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
        v1 = values[i],
        v2 = values[i + 1],
        v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
        v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
    return extension_basis_basis((t - i / n) * n, v0, v1, v2, v3);
  };
}

;// ../../node_modules/d3-interpolate/src/basisClosed.js


/* harmony default export */ function extension_src_basisClosed(values) {
  var n = values.length;
  return function(t) {
    var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
        v0 = values[(i + n - 1) % n],
        v1 = values[i % n],
        v2 = values[(i + 1) % n],
        v3 = values[(i + 2) % n];
    return extension_basis_basis((t - i / n) * n, v0, v1, v2, v3);
  };
}

;// ../../node_modules/d3-interpolate/src/constant.js
/* harmony default export */ const extension_d3_interpolate_src_constant = (x => () => x);

;// ../../node_modules/d3-interpolate/src/color.js


function extension_color_linear(a, d) {
  return function(t) {
    return a + t * d;
  };
}

function extension_exponential(a, b, y) {
  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
    return Math.pow(a + t * b, y);
  };
}

function extension_hue(a, b) {
  var d = b - a;
  return d ? extension_color_linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : extension_d3_interpolate_src_constant(isNaN(a) ? b : a);
}

function extension_gamma(y) {
  return (y = +y) === 1 ? extension_nogamma : function(a, b) {
    return b - a ? extension_exponential(a, b, y) : extension_d3_interpolate_src_constant(isNaN(a) ? b : a);
  };
}

function extension_nogamma(a, b) {
  var d = b - a;
  return d ? extension_color_linear(a, d) : extension_d3_interpolate_src_constant(isNaN(a) ? b : a);
}

;// ../../node_modules/d3-interpolate/src/rgb.js





/* harmony default export */ const extension_rgb = ((function rgbGamma(y) {
  var color = extension_gamma(y);

  function rgb(start, end) {
    var r = color((start = extension_color_rgb(start)).r, (end = extension_color_rgb(end)).r),
        g = color(start.g, end.g),
        b = color(start.b, end.b),
        opacity = extension_nogamma(start.opacity, end.opacity);
    return function(t) {
      start.r = r(t);
      start.g = g(t);
      start.b = b(t);
      start.opacity = opacity(t);
      return start + "";
    };
  }

  rgb.gamma = rgbGamma;

  return rgb;
})(1));

function extension_rgbSpline(spline) {
  return function(colors) {
    var n = colors.length,
        r = new Array(n),
        g = new Array(n),
        b = new Array(n),
        i, color;
    for (i = 0; i < n; ++i) {
      color = extension_color_rgb(colors[i]);
      r[i] = color.r || 0;
      g[i] = color.g || 0;
      b[i] = color.b || 0;
    }
    r = spline(r);
    g = spline(g);
    b = spline(b);
    color.opacity = 1;
    return function(t) {
      color.r = r(t);
      color.g = g(t);
      color.b = b(t);
      return color + "";
    };
  };
}

var extension_rgbBasis = extension_rgbSpline(extension_src_basis);
var extension_rgbBasisClosed = extension_rgbSpline(extension_src_basisClosed);

;// ../../node_modules/d3-interpolate/src/numberArray.js
/* harmony default export */ function extension_numberArray(a, b) {
  if (!b) b = [];
  var n = a ? Math.min(b.length, a.length) : 0,
      c = b.slice(),
      i;
  return function(t) {
    for (i = 0; i < n; ++i) c[i] = a[i] * (1 - t) + b[i] * t;
    return c;
  };
}

function extension_isNumberArray(x) {
  return ArrayBuffer.isView(x) && !(x instanceof DataView);
}

;// ../../node_modules/d3-interpolate/src/array.js



/* harmony default export */ function extension_d3_interpolate_src_array(a, b) {
  return (extension_isNumberArray(b) ? extension_numberArray : extension_genericArray)(a, b);
}

function extension_genericArray(a, b) {
  var nb = b ? b.length : 0,
      na = a ? Math.min(nb, a.length) : 0,
      x = new Array(na),
      c = new Array(nb),
      i;

  for (i = 0; i < na; ++i) x[i] = extension_value(a[i], b[i]);
  for (; i < nb; ++i) c[i] = b[i];

  return function(t) {
    for (i = 0; i < na; ++i) c[i] = x[i](t);
    return c;
  };
}

;// ../../node_modules/d3-interpolate/src/date.js
/* harmony default export */ function extension_src_date(a, b) {
  var d = new Date;
  return a = +a, b = +b, function(t) {
    return d.setTime(a * (1 - t) + b * t), d;
  };
}

;// ../../node_modules/d3-interpolate/src/number.js
/* harmony default export */ function extension_src_number(a, b) {
  return a = +a, b = +b, function(t) {
    return a * (1 - t) + b * t;
  };
}

;// ../../node_modules/d3-interpolate/src/object.js


/* harmony default export */ function extension_src_object(a, b) {
  var i = {},
      c = {},
      k;

  if (a === null || typeof a !== "object") a = {};
  if (b === null || typeof b !== "object") b = {};

  for (k in b) {
    if (k in a) {
      i[k] = extension_value(a[k], b[k]);
    } else {
      c[k] = b[k];
    }
  }

  return function(t) {
    for (k in i) c[k] = i[k](t);
    return c;
  };
}

;// ../../node_modules/d3-interpolate/src/string.js


var extension_reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
    extension_reB = new RegExp(extension_reA.source, "g");

function extension_string_zero(b) {
  return function() {
    return b;
  };
}

function extension_string_one(b) {
  return function(t) {
    return b(t) + "";
  };
}

/* harmony default export */ function extension_src_string(a, b) {
  var bi = extension_reA.lastIndex = extension_reB.lastIndex = 0, // scan index for next number in b
      am, // current match in a
      bm, // current match in b
      bs, // string preceding current number in b, if any
      i = -1, // index in s
      s = [], // string constants and placeholders
      q = []; // number interpolators

  // Coerce inputs to strings.
  a = a + "", b = b + "";

  // Interpolate pairs of numbers in a & b.
  while ((am = extension_reA.exec(a))
      && (bm = extension_reB.exec(b))) {
    if ((bs = bm.index) > bi) { // a string precedes the next number in b
      bs = b.slice(bi, bs);
      if (s[i]) s[i] += bs; // coalesce with previous string
      else s[++i] = bs;
    }
    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
      if (s[i]) s[i] += bm; // coalesce with previous string
      else s[++i] = bm;
    } else { // interpolate non-matching numbers
      s[++i] = null;
      q.push({i: i, x: extension_src_number(am, bm)});
    }
    bi = extension_reB.lastIndex;
  }

  // Add remains of b.
  if (bi < b.length) {
    bs = b.slice(bi);
    if (s[i]) s[i] += bs; // coalesce with previous string
    else s[++i] = bs;
  }

  // Special optimization for only a single match.
  // Otherwise, interpolate each of the numbers and rejoin the string.
  return s.length < 2 ? (q[0]
      ? extension_string_one(q[0].x)
      : extension_string_zero(b))
      : (b = q.length, function(t) {
          for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
          return s.join("");
        });
}

;// ../../node_modules/d3-interpolate/src/value.js










/* harmony default export */ function extension_value(a, b) {
  var t = typeof b, c;
  return b == null || t === "boolean" ? extension_d3_interpolate_src_constant(b)
      : (t === "number" ? extension_src_number
      : t === "string" ? ((c = extension_color(b)) ? (b = c, extension_rgb) : extension_src_string)
      : b instanceof extension_color ? extension_rgb
      : b instanceof Date ? extension_src_date
      : extension_isNumberArray(b) ? extension_numberArray
      : Array.isArray(b) ? extension_genericArray
      : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? extension_src_object
      : extension_src_number)(a, b);
}

;// ../../node_modules/d3-interpolate/src/round.js
/* harmony default export */ function extension_src_round(a, b) {
  return a = +a, b = +b, function(t) {
    return Math.round(a * (1 - t) + b * t);
  };
}

;// ../../node_modules/d3-scale/src/constant.js
function extension_constant_constants(x) {
  return function() {
    return x;
  };
}

;// ../../node_modules/d3-scale/src/number.js
function extension_src_number_number(x) {
  return +x;
}

;// ../../node_modules/d3-scale/src/continuous.js





var extension_unit = [0, 1];

function extension_continuous_identity(x) {
  return x;
}

function extension_normalize(a, b) {
  return (b -= (a = +a))
      ? function(x) { return (x - a) / b; }
      : extension_constant_constants(isNaN(b) ? NaN : 0.5);
}

function extension_clamper(a, b) {
  var t;
  if (a > b) t = a, a = b, b = t;
  return function(x) { return Math.max(a, Math.min(b, x)); };
}

// normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
// interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
function extension_bimap(domain, range, interpolate) {
  var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
  if (d1 < d0) d0 = extension_normalize(d1, d0), r0 = interpolate(r1, r0);
  else d0 = extension_normalize(d0, d1), r0 = interpolate(r0, r1);
  return function(x) { return r0(d0(x)); };
}

function extension_polymap(domain, range, interpolate) {
  var j = Math.min(domain.length, range.length) - 1,
      d = new Array(j),
      r = new Array(j),
      i = -1;

  // Reverse descending domains.
  if (domain[j] < domain[0]) {
    domain = domain.slice().reverse();
    range = range.slice().reverse();
  }

  while (++i < j) {
    d[i] = extension_normalize(domain[i], domain[i + 1]);
    r[i] = interpolate(range[i], range[i + 1]);
  }

  return function(x) {
    var i = extension_src_bisect(domain, x, 1, j) - 1;
    return r[i](d[i](x));
  };
}

function extension_copy(source, target) {
  return target
      .domain(source.domain())
      .range(source.range())
      .interpolate(source.interpolate())
      .clamp(source.clamp())
      .unknown(source.unknown());
}

function extension_transformer() {
  var domain = extension_unit,
      range = extension_unit,
      interpolate = extension_value,
      transform,
      untransform,
      unknown,
      clamp = extension_continuous_identity,
      piecewise,
      output,
      input;

  function rescale() {
    var n = Math.min(domain.length, range.length);
    if (clamp !== extension_continuous_identity) clamp = extension_clamper(domain[0], domain[n - 1]);
    piecewise = n > 2 ? extension_polymap : extension_bimap;
    output = input = null;
    return scale;
  }

  function scale(x) {
    return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
  }

  scale.invert = function(y) {
    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), extension_src_number)))(y)));
  };

  scale.domain = function(_) {
    return arguments.length ? (domain = Array.from(_, extension_src_number_number), rescale()) : domain.slice();
  };

  scale.range = function(_) {
    return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
  };

  scale.rangeRound = function(_) {
    return range = Array.from(_), interpolate = extension_src_round, rescale();
  };

  scale.clamp = function(_) {
    return arguments.length ? (clamp = _ ? true : extension_continuous_identity, rescale()) : clamp !== extension_continuous_identity;
  };

  scale.interpolate = function(_) {
    return arguments.length ? (interpolate = _, rescale()) : interpolate;
  };

  scale.unknown = function(_) {
    return arguments.length ? (unknown = _, scale) : unknown;
  };

  return function(t, u) {
    transform = t, untransform = u;
    return rescale();
  };
}

function extension_continuous() {
  return extension_transformer()(extension_continuous_identity, extension_continuous_identity);
}

;// ../../node_modules/d3-scale/src/init.js
function extension_initRange(domain, range) {
  switch (arguments.length) {
    case 0: break;
    case 1: this.range(domain); break;
    default: this.range(range).domain(domain); break;
  }
  return this;
}

function extension_initInterpolator(domain, interpolator) {
  switch (arguments.length) {
    case 0: break;
    case 1: {
      if (typeof domain === "function") this.interpolator(domain);
      else this.range(domain);
      break;
    }
    default: {
      this.domain(domain);
      if (typeof interpolator === "function") this.interpolator(interpolator);
      else this.range(interpolator);
      break;
    }
  }
  return this;
}

;// ../../node_modules/d3-scale/src/tickFormat.js



function extension_tickFormat(start, stop, count, specifier) {
  var step = extension_tickStep(start, stop, count),
      precision;
  specifier = extension_formatSpecifier(specifier == null ? ",f" : specifier);
  switch (specifier.type) {
    case "s": {
      var value = Math.max(Math.abs(start), Math.abs(stop));
      if (specifier.precision == null && !isNaN(precision = extension_precisionPrefix(step, value))) specifier.precision = precision;
      return extension_formatPrefix(specifier, value);
    }
    case "":
    case "e":
    case "g":
    case "p":
    case "r": {
      if (specifier.precision == null && !isNaN(precision = extension_precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
      break;
    }
    case "f":
    case "%": {
      if (specifier.precision == null && !isNaN(precision = extension_precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
      break;
    }
  }
  return extension_format(specifier);
}

;// ../../node_modules/d3-scale/src/linear.js





function extension_linearish(scale) {
  var domain = scale.domain;

  scale.ticks = function(count) {
    var d = domain();
    return extension_ticks(d[0], d[d.length - 1], count == null ? 10 : count);
  };

  scale.tickFormat = function(count, specifier) {
    var d = domain();
    return extension_tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
  };

  scale.nice = function(count) {
    if (count == null) count = 10;

    var d = domain();
    var i0 = 0;
    var i1 = d.length - 1;
    var start = d[i0];
    var stop = d[i1];
    var prestep;
    var step;
    var maxIter = 10;

    if (stop < start) {
      step = start, start = stop, stop = step;
      step = i0, i0 = i1, i1 = step;
    }
    
    while (maxIter-- > 0) {
      step = extension_tickIncrement(start, stop, count);
      if (step === prestep) {
        d[i0] = start
        d[i1] = stop
        return domain(d);
      } else if (step > 0) {
        start = Math.floor(start / step) * step;
        stop = Math.ceil(stop / step) * step;
      } else if (step < 0) {
        start = Math.ceil(start * step) / step;
        stop = Math.floor(stop * step) / step;
      } else {
        break;
      }
      prestep = step;
    }

    return scale;
  };

  return scale;
}

function extension_linear_linear() {
  var scale = extension_continuous();

  scale.copy = function() {
    return extension_copy(scale, extension_linear_linear());
  };

  extension_initRange.apply(scale, arguments);

  return extension_linearish(scale);
}

;// ../../node_modules/d3-scale/src/identity.js



function extension_identity_identity(domain) {
  var unknown;

  function scale(x) {
    return x == null || isNaN(x = +x) ? unknown : x;
  }

  scale.invert = scale;

  scale.domain = scale.range = function(_) {
    return arguments.length ? (domain = Array.from(_, extension_src_number_number), scale) : domain.slice();
  };

  scale.unknown = function(_) {
    return arguments.length ? (unknown = _, scale) : unknown;
  };

  scale.copy = function() {
    return extension_identity_identity(domain).unknown(unknown);
  };

  domain = arguments.length ? Array.from(domain, extension_src_number_number) : [0, 1];

  return extension_linearish(scale);
}

;// ../../node_modules/d3-scale/src/nice.js
function extension_nice(domain, interval) {
  domain = domain.slice();

  var i0 = 0,
      i1 = domain.length - 1,
      x0 = domain[i0],
      x1 = domain[i1],
      t;

  if (x1 < x0) {
    t = i0, i0 = i1, i1 = t;
    t = x0, x0 = x1, x1 = t;
  }

  domain[i0] = interval.floor(x0);
  domain[i1] = interval.ceil(x1);
  return domain;
}

;// ../../node_modules/d3-scale/src/log.js






function extension_transformLog(x) {
  return Math.log(x);
}

function extension_transformExp(x) {
  return Math.exp(x);
}

function extension_transformLogn(x) {
  return -Math.log(-x);
}

function extension_transformExpn(x) {
  return -Math.exp(-x);
}

function extension_pow10(x) {
  return isFinite(x) ? +("1e" + x) : x < 0 ? 0 : x;
}

function extension_powp(base) {
  return base === 10 ? extension_pow10
      : base === Math.E ? Math.exp
      : x => Math.pow(base, x);
}

function extension_logp(base) {
  return base === Math.E ? Math.log
      : base === 10 && Math.log10
      || base === 2 && Math.log2
      || (base = Math.log(base), x => Math.log(x) / base);
}

function extension_reflect(f) {
  return (x, k) => -f(-x, k);
}

function extension_loggish(transform) {
  const scale = transform(extension_transformLog, extension_transformExp);
  const domain = scale.domain;
  let base = 10;
  let logs;
  let pows;

  function rescale() {
    logs = extension_logp(base), pows = extension_powp(base);
    if (domain()[0] < 0) {
      logs = extension_reflect(logs), pows = extension_reflect(pows);
      transform(extension_transformLogn, extension_transformExpn);
    } else {
      transform(extension_transformLog, extension_transformExp);
    }
    return scale;
  }

  scale.base = function(_) {
    return arguments.length ? (base = +_, rescale()) : base;
  };

  scale.domain = function(_) {
    return arguments.length ? (domain(_), rescale()) : domain();
  };

  scale.ticks = count => {
    const d = domain();
    let u = d[0];
    let v = d[d.length - 1];
    const r = v < u;

    if (r) ([u, v] = [v, u]);

    let i = logs(u);
    let j = logs(v);
    let k;
    let t;
    const n = count == null ? 10 : +count;
    let z = [];

    if (!(base % 1) && j - i < n) {
      i = Math.floor(i), j = Math.ceil(j);
      if (u > 0) for (; i <= j; ++i) {
        for (k = 1; k < base; ++k) {
          t = i < 0 ? k / pows(-i) : k * pows(i);
          if (t < u) continue;
          if (t > v) break;
          z.push(t);
        }
      } else for (; i <= j; ++i) {
        for (k = base - 1; k >= 1; --k) {
          t = i > 0 ? k / pows(-i) : k * pows(i);
          if (t < u) continue;
          if (t > v) break;
          z.push(t);
        }
      }
      if (z.length * 2 < n) z = extension_ticks(u, v, n);
    } else {
      z = extension_ticks(i, j, Math.min(j - i, n)).map(pows);
    }
    return r ? z.reverse() : z;
  };

  scale.tickFormat = (count, specifier) => {
    if (count == null) count = 10;
    if (specifier == null) specifier = base === 10 ? "s" : ",";
    if (typeof specifier !== "function") {
      if (!(base % 1) && (specifier = extension_formatSpecifier(specifier)).precision == null) specifier.trim = true;
      specifier = extension_format(specifier);
    }
    if (count === Infinity) return specifier;
    const k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?
    return d => {
      let i = d / pows(Math.round(logs(d)));
      if (i * base < base - 0.5) i *= base;
      return i <= k ? specifier(d) : "";
    };
  };

  scale.nice = () => {
    return domain(extension_nice(domain(), {
      floor: x => pows(Math.floor(logs(x))),
      ceil: x => pows(Math.ceil(logs(x)))
    }));
  };

  return scale;
}

function extension_log_log() {
  const scale = extension_loggish(extension_transformer()).domain([1, 10]);
  scale.copy = () => extension_copy(scale, extension_log_log()).base(scale.base());
  extension_initRange.apply(scale, arguments);
  return scale;
}

;// ../../node_modules/d3-scale/src/pow.js




function extension_transformPow(exponent) {
  return function(x) {
    return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
  };
}

function extension_transformSqrt(x) {
  return x < 0 ? -Math.sqrt(-x) : Math.sqrt(x);
}

function extension_transformSquare(x) {
  return x < 0 ? -x * x : x * x;
}

function extension_powish(transform) {
  var scale = transform(extension_continuous_identity, extension_continuous_identity),
      exponent = 1;

  function rescale() {
    return exponent === 1 ? transform(extension_continuous_identity, extension_continuous_identity)
        : exponent === 0.5 ? transform(extension_transformSqrt, extension_transformSquare)
        : transform(extension_transformPow(exponent), extension_transformPow(1 / exponent));
  }

  scale.exponent = function(_) {
    return arguments.length ? (exponent = +_, rescale()) : exponent;
  };

  return extension_linearish(scale);
}

function extension_pow_pow() {
  var scale = extension_powish(extension_transformer());

  scale.copy = function() {
    return extension_copy(scale, extension_pow_pow()).exponent(scale.exponent());
  };

  extension_initRange.apply(scale, arguments);

  return scale;
}

function extension_pow_sqrt() {
  return extension_pow_pow.apply(null, arguments).exponent(0.5);
}

;// ../../node_modules/d3-scale/src/symlog.js




function extension_transformSymlog(c) {
  return function(x) {
    return Math.sign(x) * Math.log1p(Math.abs(x / c));
  };
}

function extension_transformSymexp(c) {
  return function(x) {
    return Math.sign(x) * Math.expm1(Math.abs(x)) * c;
  };
}

function extension_symlogish(transform) {
  var c = 1, scale = transform(extension_transformSymlog(c), extension_transformSymexp(c));

  scale.constant = function(_) {
    return arguments.length ? transform(extension_transformSymlog(c = +_), extension_transformSymexp(c)) : c;
  };

  return extension_linearish(scale);
}

function extension_symlog_symlog() {
  var scale = extension_symlogish(extension_transformer());

  scale.copy = function() {
    return extension_copy(scale, extension_symlog_symlog()).constant(scale.constant());
  };

  return extension_initRange.apply(scale, arguments);
}

;// ../../node_modules/d3-time/src/ticks.js











function extension_ticker(year, month, week, day, hour, minute) {

  const tickIntervals = [
    [extension_second,  1,      extension_durationSecond],
    [extension_second,  5,  5 * extension_durationSecond],
    [extension_second, 15, 15 * extension_durationSecond],
    [extension_second, 30, 30 * extension_durationSecond],
    [minute,  1,      extension_durationMinute],
    [minute,  5,  5 * extension_durationMinute],
    [minute, 15, 15 * extension_durationMinute],
    [minute, 30, 30 * extension_durationMinute],
    [  hour,  1,      extension_durationHour  ],
    [  hour,  3,  3 * extension_durationHour  ],
    [  hour,  6,  6 * extension_durationHour  ],
    [  hour, 12, 12 * extension_durationHour  ],
    [   day,  1,      extension_durationDay   ],
    [   day,  2,  2 * extension_durationDay   ],
    [  week,  1,      extension_durationWeek  ],
    [ month,  1,      extension_durationMonth ],
    [ month,  3,  3 * extension_durationMonth ],
    [  year,  1,      extension_durationYear  ]
  ];

  function ticks(start, stop, count) {
    const reverse = stop < start;
    if (reverse) [start, stop] = [stop, start];
    const interval = count && typeof count.range === "function" ? count : tickInterval(start, stop, count);
    const ticks = interval ? interval.range(start, +stop + 1) : []; // inclusive stop
    return reverse ? ticks.reverse() : ticks;
  }

  function tickInterval(start, stop, count) {
    const target = Math.abs(stop - start) / count;
    const i = extension_bisector_bisector(([,, step]) => step).right(tickIntervals, target);
    if (i === tickIntervals.length) return year.every(extension_tickStep(start / extension_durationYear, stop / extension_durationYear, count));
    if (i === 0) return extension_millisecond.every(Math.max(extension_tickStep(start, stop, count), 1));
    const [t, step] = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];
    return t.every(step);
  }

  return [ticks, tickInterval];
}

const [extension_utcTicks, extension_utcTickInterval] = extension_ticker(extension_utcYear, extension_utcMonth, extension_utcSunday, extension_unixDay, extension_utcHour, extension_utcMinute);
const [extension_timeTicks, extension_timeTickInterval] = extension_ticker(extension_timeYear, extension_timeMonth, extension_timeSunday, extension_timeDay, extension_timeHour, extension_timeMinute);



;// ../../node_modules/d3-scale/src/time.js






function extension_time_date(t) {
  return new Date(t);
}

function extension_time_number(t) {
  return t instanceof Date ? +t : +new Date(+t);
}

function extension_calendar(ticks, tickInterval, year, month, week, day, hour, minute, second, format) {
  var scale = extension_continuous(),
      invert = scale.invert,
      domain = scale.domain;

  var formatMillisecond = format(".%L"),
      formatSecond = format(":%S"),
      formatMinute = format("%I:%M"),
      formatHour = format("%I %p"),
      formatDay = format("%a %d"),
      formatWeek = format("%b %d"),
      formatMonth = format("%B"),
      formatYear = format("%Y");

  function tickFormat(date) {
    return (second(date) < date ? formatMillisecond
        : minute(date) < date ? formatSecond
        : hour(date) < date ? formatMinute
        : day(date) < date ? formatHour
        : month(date) < date ? (week(date) < date ? formatDay : formatWeek)
        : year(date) < date ? formatMonth
        : formatYear)(date);
  }

  scale.invert = function(y) {
    return new Date(invert(y));
  };

  scale.domain = function(_) {
    return arguments.length ? domain(Array.from(_, extension_time_number)) : domain().map(extension_time_date);
  };

  scale.ticks = function(interval) {
    var d = domain();
    return ticks(d[0], d[d.length - 1], interval == null ? 10 : interval);
  };

  scale.tickFormat = function(count, specifier) {
    return specifier == null ? tickFormat : format(specifier);
  };

  scale.nice = function(interval) {
    var d = domain();
    if (!interval || typeof interval.range !== "function") interval = tickInterval(d[0], d[d.length - 1], interval == null ? 10 : interval);
    return interval ? domain(extension_nice(d, interval)) : scale;
  };

  scale.copy = function() {
    return extension_copy(scale, extension_calendar(ticks, tickInterval, year, month, week, day, hour, minute, second, format));
  };

  return scale;
}

function extension_time() {
  return extension_initRange.apply(extension_calendar(extension_timeTicks, extension_timeTickInterval, extension_timeYear, extension_timeMonth, extension_timeSunday, extension_timeDay, extension_timeHour, extension_timeMinute, extension_second, extension_timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]), arguments);
}

;// ../../node_modules/d3-scale/src/utcTime.js





function extension_utcTime() {
  return extension_initRange.apply(extension_calendar(extension_utcTicks, extension_utcTickInterval, extension_utcYear, extension_utcMonth, extension_utcSunday, extension_utcDay, extension_utcHour, extension_utcMinute, extension_second, extension_utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]), arguments);
}

;// ../../node_modules/d3-scale/src/sequential.js








function extension_sequential_transformer() {
  var x0 = 0,
      x1 = 1,
      t0,
      t1,
      k10,
      transform,
      interpolator = extension_continuous_identity,
      clamp = false,
      unknown;

  function scale(x) {
    return x == null || isNaN(x = +x) ? unknown : interpolator(k10 === 0 ? 0.5 : (x = (transform(x) - t0) * k10, clamp ? Math.max(0, Math.min(1, x)) : x));
  }

  scale.domain = function(_) {
    return arguments.length ? ([x0, x1] = _, t0 = transform(x0 = +x0), t1 = transform(x1 = +x1), k10 = t0 === t1 ? 0 : 1 / (t1 - t0), scale) : [x0, x1];
  };

  scale.clamp = function(_) {
    return arguments.length ? (clamp = !!_, scale) : clamp;
  };

  scale.interpolator = function(_) {
    return arguments.length ? (interpolator = _, scale) : interpolator;
  };

  function range(interpolate) {
    return function(_) {
      var r0, r1;
      return arguments.length ? ([r0, r1] = _, interpolator = interpolate(r0, r1), scale) : [interpolator(0), interpolator(1)];
    };
  }

  scale.range = range(extension_value);

  scale.rangeRound = range(extension_src_round);

  scale.unknown = function(_) {
    return arguments.length ? (unknown = _, scale) : unknown;
  };

  return function(t) {
    transform = t, t0 = t(x0), t1 = t(x1), k10 = t0 === t1 ? 0 : 1 / (t1 - t0);
    return scale;
  };
}

function extension_sequential_copy(source, target) {
  return target
      .domain(source.domain())
      .interpolator(source.interpolator())
      .clamp(source.clamp())
      .unknown(source.unknown());
}

function extension_sequential() {
  var scale = extension_linearish(extension_sequential_transformer()(extension_continuous_identity));

  scale.copy = function() {
    return extension_sequential_copy(scale, extension_sequential());
  };

  return extension_initInterpolator.apply(scale, arguments);
}

function extension_sequentialLog() {
  var scale = extension_loggish(extension_sequential_transformer()).domain([1, 10]);

  scale.copy = function() {
    return extension_sequential_copy(scale, extension_sequentialLog()).base(scale.base());
  };

  return extension_initInterpolator.apply(scale, arguments);
}

function extension_sequentialSymlog() {
  var scale = extension_symlogish(extension_sequential_transformer());

  scale.copy = function() {
    return extension_sequential_copy(scale, extension_sequentialSymlog()).constant(scale.constant());
  };

  return extension_initInterpolator.apply(scale, arguments);
}

function extension_sequentialPow() {
  var scale = extension_powish(extension_sequential_transformer());

  scale.copy = function() {
    return extension_sequential_copy(scale, extension_sequentialPow()).exponent(scale.exponent());
  };

  return extension_initInterpolator.apply(scale, arguments);
}

function extension_sequentialSqrt() {
  return extension_sequentialPow.apply(null, arguments).exponent(0.5);
}

;// ../../node_modules/d3-interpolate/src/piecewise.js


function extension_piecewise(interpolate, values) {
  if (values === undefined) values = interpolate, interpolate = extension_value;
  var i = 0, n = values.length - 1, v = values[0], I = new Array(n < 0 ? 0 : n);
  while (i < n) I[i] = interpolate(v, v = values[++i]);
  return function(t) {
    var i = Math.max(0, Math.min(n - 1, Math.floor(t *= n)));
    return I[i](t - i);
  };
}

;// ../../node_modules/d3-scale/src/diverging.js









function extension_diverging_transformer() {
  var x0 = 0,
      x1 = 0.5,
      x2 = 1,
      s = 1,
      t0,
      t1,
      t2,
      k10,
      k21,
      interpolator = extension_continuous_identity,
      transform,
      clamp = false,
      unknown;

  function scale(x) {
    return isNaN(x = +x) ? unknown : (x = 0.5 + ((x = +transform(x)) - t1) * (s * x < s * t1 ? k10 : k21), interpolator(clamp ? Math.max(0, Math.min(1, x)) : x));
  }

  scale.domain = function(_) {
    return arguments.length ? ([x0, x1, x2] = _, t0 = transform(x0 = +x0), t1 = transform(x1 = +x1), t2 = transform(x2 = +x2), k10 = t0 === t1 ? 0 : 0.5 / (t1 - t0), k21 = t1 === t2 ? 0 : 0.5 / (t2 - t1), s = t1 < t0 ? -1 : 1, scale) : [x0, x1, x2];
  };

  scale.clamp = function(_) {
    return arguments.length ? (clamp = !!_, scale) : clamp;
  };

  scale.interpolator = function(_) {
    return arguments.length ? (interpolator = _, scale) : interpolator;
  };

  function range(interpolate) {
    return function(_) {
      var r0, r1, r2;
      return arguments.length ? ([r0, r1, r2] = _, interpolator = extension_piecewise(interpolate, [r0, r1, r2]), scale) : [interpolator(0), interpolator(0.5), interpolator(1)];
    };
  }

  scale.range = range(extension_value);

  scale.rangeRound = range(extension_src_round);

  scale.unknown = function(_) {
    return arguments.length ? (unknown = _, scale) : unknown;
  };

  return function(t) {
    transform = t, t0 = t(x0), t1 = t(x1), t2 = t(x2), k10 = t0 === t1 ? 0 : 0.5 / (t1 - t0), k21 = t1 === t2 ? 0 : 0.5 / (t2 - t1), s = t1 < t0 ? -1 : 1;
    return scale;
  };
}

function extension_diverging() {
  var scale = extension_linearish(extension_diverging_transformer()(extension_continuous_identity));

  scale.copy = function() {
    return extension_sequential_copy(scale, extension_diverging());
  };

  return extension_initInterpolator.apply(scale, arguments);
}

function extension_divergingLog() {
  var scale = extension_loggish(extension_diverging_transformer()).domain([0.1, 1, 10]);

  scale.copy = function() {
    return extension_sequential_copy(scale, extension_divergingLog()).base(scale.base());
  };

  return extension_initInterpolator.apply(scale, arguments);
}

function extension_divergingSymlog() {
  var scale = extension_symlogish(extension_diverging_transformer());

  scale.copy = function() {
    return extension_sequential_copy(scale, extension_divergingSymlog()).constant(scale.constant());
  };

  return extension_initInterpolator.apply(scale, arguments);
}

function extension_divergingPow() {
  var scale = extension_powish(extension_diverging_transformer());

  scale.copy = function() {
    return extension_sequential_copy(scale, extension_divergingPow()).exponent(scale.exponent());
  };

  return extension_initInterpolator.apply(scale, arguments);
}

function extension_divergingSqrt() {
  return extension_divergingPow.apply(null, arguments).exponent(0.5);
}

;// ../../node_modules/d3-scale/src/quantile.js



function extension_src_quantile_quantile() {
  var domain = [],
      range = [],
      thresholds = [],
      unknown;

  function rescale() {
    var i = 0, n = Math.max(1, range.length);
    thresholds = new Array(n - 1);
    while (++i < n) thresholds[i - 1] = extension_quantileSorted(domain, i / n);
    return scale;
  }

  function scale(x) {
    return x == null || isNaN(x = +x) ? unknown : range[extension_src_bisect(thresholds, x)];
  }

  scale.invertExtent = function(y) {
    var i = range.indexOf(y);
    return i < 0 ? [NaN, NaN] : [
      i > 0 ? thresholds[i - 1] : domain[0],
      i < thresholds.length ? thresholds[i] : domain[domain.length - 1]
    ];
  };

  scale.domain = function(_) {
    if (!arguments.length) return domain.slice();
    domain = [];
    for (let d of _) if (d != null && !isNaN(d = +d)) domain.push(d);
    domain.sort(extension_ascending_ascending);
    return rescale();
  };

  scale.range = function(_) {
    return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
  };

  scale.unknown = function(_) {
    return arguments.length ? (unknown = _, scale) : unknown;
  };

  scale.quantiles = function() {
    return thresholds.slice();
  };

  scale.copy = function() {
    return extension_src_quantile_quantile()
        .domain(domain)
        .range(range)
        .unknown(unknown);
  };

  return extension_initRange.apply(scale, arguments);
}

;// ../../node_modules/d3-scale/src/quantize.js




function extension_quantize() {
  var x0 = 0,
      x1 = 1,
      n = 1,
      domain = [0.5],
      range = [0, 1],
      unknown;

  function scale(x) {
    return x != null && x <= x ? range[extension_src_bisect(domain, x, 0, n)] : unknown;
  }

  function rescale() {
    var i = -1;
    domain = new Array(n);
    while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
    return scale;
  }

  scale.domain = function(_) {
    return arguments.length ? ([x0, x1] = _, x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
  };

  scale.range = function(_) {
    return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
  };

  scale.invertExtent = function(y) {
    var i = range.indexOf(y);
    return i < 0 ? [NaN, NaN]
        : i < 1 ? [x0, domain[0]]
        : i >= n ? [domain[n - 1], x1]
        : [domain[i - 1], domain[i]];
  };

  scale.unknown = function(_) {
    return arguments.length ? (unknown = _, scale) : scale;
  };

  scale.thresholds = function() {
    return domain.slice();
  };

  scale.copy = function() {
    return extension_quantize()
        .domain([x0, x1])
        .range(range)
        .unknown(unknown);
  };

  return extension_initRange.apply(extension_linearish(scale), arguments);
}

;// ../../node_modules/d3-scale/src/threshold.js



function extension_threshold() {
  var domain = [0.5],
      range = [0, 1],
      unknown,
      n = 1;

  function scale(x) {
    return x != null && x <= x ? range[extension_src_bisect(domain, x, 0, n)] : unknown;
  }

  scale.domain = function(_) {
    return arguments.length ? (domain = Array.from(_), n = Math.min(domain.length, range.length - 1), scale) : domain.slice();
  };

  scale.range = function(_) {
    return arguments.length ? (range = Array.from(_), n = Math.min(domain.length, range.length - 1), scale) : range.slice();
  };

  scale.invertExtent = function(y) {
    var i = range.indexOf(y);
    return [domain[i - 1], domain[i]];
  };

  scale.unknown = function(_) {
    return arguments.length ? (unknown = _, scale) : unknown;
  };

  scale.copy = function() {
    return extension_threshold()
        .domain(domain)
        .range(range)
        .unknown(unknown);
  };

  return extension_initRange.apply(scale, arguments);
}

;// ../../node_modules/internmap/src/index.js
class extension_InternMap extends Map {
  constructor(entries, key = extension_keyof) {
    super();
    Object.defineProperties(this, {_intern: {value: new Map()}, _key: {value: key}});
    if (entries != null) for (const [key, value] of entries) this.set(key, value);
  }
  get(key) {
    return super.get(extension_intern_get(this, key));
  }
  has(key) {
    return super.has(extension_intern_get(this, key));
  }
  set(key, value) {
    return super.set(extension_intern_set(this, key), value);
  }
  delete(key) {
    return super.delete(extension_intern_delete(this, key));
  }
}

class extension_InternSet extends Set {
  constructor(values, key = extension_keyof) {
    super();
    Object.defineProperties(this, {_intern: {value: new Map()}, _key: {value: key}});
    if (values != null) for (const value of values) this.add(value);
  }
  has(value) {
    return super.has(extension_intern_get(this, value));
  }
  add(value) {
    return super.add(extension_intern_set(this, value));
  }
  delete(value) {
    return super.delete(extension_intern_delete(this, value));
  }
}

function extension_intern_get({_intern, _key}, value) {
  const key = _key(value);
  return _intern.has(key) ? _intern.get(key) : value;
}

function extension_intern_set({_intern, _key}, value) {
  const key = _key(value);
  if (_intern.has(key)) return _intern.get(key);
  _intern.set(key, value);
  return value;
}

function extension_intern_delete({_intern, _key}, value) {
  const key = _key(value);
  if (_intern.has(key)) {
    value = _intern.get(key);
    _intern.delete(key);
  }
  return value;
}

function extension_keyof(value) {
  return value !== null && typeof value === "object" ? value.valueOf() : value;
}

;// ../../node_modules/d3-scale/src/ordinal.js



const extension_implicit = Symbol("implicit");

function extension_ordinal() {
  var index = new extension_InternMap(),
      domain = [],
      range = [],
      unknown = extension_implicit;

  function scale(d) {
    let i = index.get(d);
    if (i === undefined) {
      if (unknown !== extension_implicit) return unknown;
      index.set(d, i = domain.push(d) - 1);
    }
    return range[i % range.length];
  }

  scale.domain = function(_) {
    if (!arguments.length) return domain.slice();
    domain = [], index = new extension_InternMap();
    for (const value of _) {
      if (index.has(value)) continue;
      index.set(value, domain.push(value) - 1);
    }
    return scale;
  };

  scale.range = function(_) {
    return arguments.length ? (range = Array.from(_), scale) : range.slice();
  };

  scale.unknown = function(_) {
    return arguments.length ? (unknown = _, scale) : unknown;
  };

  scale.copy = function() {
    return extension_ordinal(domain, range).unknown(unknown);
  };

  extension_initRange.apply(scale, arguments);

  return scale;
}

;// ../../node_modules/d3-interpolate/src/discrete.js
/* harmony default export */ function extension_discrete(range) {
  var n = range.length;
  return function(t) {
    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
  };
}

;// ../../node_modules/d3-interpolate/src/hue.js


/* harmony default export */ function extension_src_hue(a, b) {
  var i = extension_hue(+a, +b);
  return function(t) {
    var x = i(t);
    return x - 360 * Math.floor(x / 360);
  };
}

;// ../../node_modules/d3-interpolate/src/transform/decompose.js
var extension_decompose_degrees = 180 / Math.PI;

var extension_decompose_identity = {
  translateX: 0,
  translateY: 0,
  rotate: 0,
  skewX: 0,
  scaleX: 1,
  scaleY: 1
};

/* harmony default export */ function extension_decompose(a, b, c, d, e, f) {
  var scaleX, scaleY, skewX;
  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
  return {
    translateX: e,
    translateY: f,
    rotate: Math.atan2(b, a) * extension_decompose_degrees,
    skewX: Math.atan(skewX) * extension_decompose_degrees,
    scaleX: scaleX,
    scaleY: scaleY
  };
}

;// ../../node_modules/d3-interpolate/src/transform/parse.js


var extension_svgNode;

/* eslint-disable no-undef */
function extension_parseCss(value) {
  const m = new (typeof DOMMatrix === "function" ? DOMMatrix : WebKitCSSMatrix)(value + "");
  return m.isIdentity ? extension_decompose_identity : extension_decompose(m.a, m.b, m.c, m.d, m.e, m.f);
}

function extension_parseSvg(value) {
  if (value == null) return extension_decompose_identity;
  if (!extension_svgNode) extension_svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
  extension_svgNode.setAttribute("transform", value);
  if (!(value = extension_svgNode.transform.baseVal.consolidate())) return extension_decompose_identity;
  value = value.matrix;
  return extension_decompose(value.a, value.b, value.c, value.d, value.e, value.f);
}

;// ../../node_modules/d3-interpolate/src/transform/index.js



function extension_interpolateTransform(parse, pxComma, pxParen, degParen) {

  function pop(s) {
    return s.length ? s.pop() + " " : "";
  }

  function translate(xa, ya, xb, yb, s, q) {
    if (xa !== xb || ya !== yb) {
      var i = s.push("translate(", null, pxComma, null, pxParen);
      q.push({i: i - 4, x: extension_src_number(xa, xb)}, {i: i - 2, x: extension_src_number(ya, yb)});
    } else if (xb || yb) {
      s.push("translate(" + xb + pxComma + yb + pxParen);
    }
  }

  function rotate(a, b, s, q) {
    if (a !== b) {
      if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
      q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: extension_src_number(a, b)});
    } else if (b) {
      s.push(pop(s) + "rotate(" + b + degParen);
    }
  }

  function skewX(a, b, s, q) {
    if (a !== b) {
      q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: extension_src_number(a, b)});
    } else if (b) {
      s.push(pop(s) + "skewX(" + b + degParen);
    }
  }

  function scale(xa, ya, xb, yb, s, q) {
    if (xa !== xb || ya !== yb) {
      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
      q.push({i: i - 4, x: extension_src_number(xa, xb)}, {i: i - 2, x: extension_src_number(ya, yb)});
    } else if (xb !== 1 || yb !== 1) {
      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
    }
  }

  return function(a, b) {
    var s = [], // string constants and placeholders
        q = []; // number interpolators
    a = parse(a), b = parse(b);
    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
    rotate(a.rotate, b.rotate, s, q);
    skewX(a.skewX, b.skewX, s, q);
    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
    a = b = null; // gc
    return function(t) {
      var i = -1, n = q.length, o;
      while (++i < n) s[(o = q[i]).i] = o.x(t);
      return s.join("");
    };
  };
}

var extension_interpolateTransformCss = extension_interpolateTransform(extension_parseCss, "px, ", "px)", "deg)");
var extension_interpolateTransformSvg = extension_interpolateTransform(extension_parseSvg, ", ", ")", ")");

;// ../../node_modules/d3-interpolate/src/zoom.js
var extension_epsilon2 = 1e-12;

function extension_cosh(x) {
  return ((x = Math.exp(x)) + 1 / x) / 2;
}

function extension_sinh(x) {
  return ((x = Math.exp(x)) - 1 / x) / 2;
}

function extension_tanh(x) {
  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
}

/* harmony default export */ const extension_src_zoom = ((function zoomRho(rho, rho2, rho4) {

  // p0 = [ux0, uy0, w0]
  // p1 = [ux1, uy1, w1]
  function zoom(p0, p1) {
    var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
        ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
        dx = ux1 - ux0,
        dy = uy1 - uy0,
        d2 = dx * dx + dy * dy,
        i,
        S;

    // Special case for u0 ≅ u1.
    if (d2 < extension_epsilon2) {
      S = Math.log(w1 / w0) / rho;
      i = function(t) {
        return [
          ux0 + t * dx,
          uy0 + t * dy,
          w0 * Math.exp(rho * t * S)
        ];
      }
    }

    // General case.
    else {
      var d1 = Math.sqrt(d2),
          b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
          b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
          r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
          r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
      S = (r1 - r0) / rho;
      i = function(t) {
        var s = t * S,
            coshr0 = extension_cosh(r0),
            u = w0 / (rho2 * d1) * (coshr0 * extension_tanh(rho * s + r0) - extension_sinh(r0));
        return [
          ux0 + u * dx,
          uy0 + u * dy,
          w0 * coshr0 / extension_cosh(rho * s + r0)
        ];
      }
    }

    i.duration = S * 1000 * rho / Math.SQRT2;

    return i;
  }

  zoom.rho = function(_) {
    var _1 = Math.max(1e-3, +_), _2 = _1 * _1, _4 = _2 * _2;
    return zoomRho(_1, _2, _4);
  };

  return zoom;
})(Math.SQRT2, 2, 4));

;// ../../node_modules/d3-interpolate/src/hsl.js



function extension_hsl_hsl(hue) {
  return function(start, end) {
    var h = hue((start = extension_hsl(start)).h, (end = extension_hsl(end)).h),
        s = extension_nogamma(start.s, end.s),
        l = extension_nogamma(start.l, end.l),
        opacity = extension_nogamma(start.opacity, end.opacity);
    return function(t) {
      start.h = h(t);
      start.s = s(t);
      start.l = l(t);
      start.opacity = opacity(t);
      return start + "";
    };
  }
}

/* harmony default export */ const extension_src_hsl = (extension_hsl_hsl(extension_hue));
var extension_hslLong = extension_hsl_hsl(extension_nogamma);

;// ../../node_modules/d3-color/src/math.js
const extension_math_radians = Math.PI / 180;
const extension_math_degrees = 180 / Math.PI;

;// ../../node_modules/d3-color/src/lab.js




// https://observablehq.com/@mbostock/lab-and-rgb
const extension_K = 18,
    extension_Xn = 0.96422,
    extension_Yn = 1,
    extension_Zn = 0.82521,
    extension_lab_t0 = 4 / 29,
    extension_lab_t1 = 6 / 29,
    extension_t2 = 3 * extension_lab_t1 * extension_lab_t1,
    extension_t3 = extension_lab_t1 * extension_lab_t1 * extension_lab_t1;

function extension_labConvert(o) {
  if (o instanceof extension_Lab) return new extension_Lab(o.l, o.a, o.b, o.opacity);
  if (o instanceof extension_Hcl) return extension_hcl2lab(o);
  if (!(o instanceof extension_Rgb)) o = extension_rgbConvert(o);
  var r = extension_rgb2lrgb(o.r),
      g = extension_rgb2lrgb(o.g),
      b = extension_rgb2lrgb(o.b),
      y = extension_xyz2lab((0.2225045 * r + 0.7168786 * g + 0.0606169 * b) / extension_Yn), x, z;
  if (r === g && g === b) x = z = y; else {
    x = extension_xyz2lab((0.4360747 * r + 0.3850649 * g + 0.1430804 * b) / extension_Xn);
    z = extension_xyz2lab((0.0139322 * r + 0.0971045 * g + 0.7141733 * b) / extension_Zn);
  }
  return new extension_Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
}

function extension_gray(l, opacity) {
  return new extension_Lab(l, 0, 0, opacity == null ? 1 : opacity);
}

function extension_lab(l, a, b, opacity) {
  return arguments.length === 1 ? extension_labConvert(l) : new extension_Lab(l, a, b, opacity == null ? 1 : opacity);
}

function extension_Lab(l, a, b, opacity) {
  this.l = +l;
  this.a = +a;
  this.b = +b;
  this.opacity = +opacity;
}

extension_src_define(extension_Lab, extension_lab, extension_define_extend(extension_Color, {
  brighter(k) {
    return new extension_Lab(this.l + extension_K * (k == null ? 1 : k), this.a, this.b, this.opacity);
  },
  darker(k) {
    return new extension_Lab(this.l - extension_K * (k == null ? 1 : k), this.a, this.b, this.opacity);
  },
  rgb() {
    var y = (this.l + 16) / 116,
        x = isNaN(this.a) ? y : y + this.a / 500,
        z = isNaN(this.b) ? y : y - this.b / 200;
    x = extension_Xn * extension_lab2xyz(x);
    y = extension_Yn * extension_lab2xyz(y);
    z = extension_Zn * extension_lab2xyz(z);
    return new extension_Rgb(
      extension_lrgb2rgb( 3.1338561 * x - 1.6168667 * y - 0.4906146 * z),
      extension_lrgb2rgb(-0.9787684 * x + 1.9161415 * y + 0.0334540 * z),
      extension_lrgb2rgb( 0.0719453 * x - 0.2289914 * y + 1.4052427 * z),
      this.opacity
    );
  }
}));

function extension_xyz2lab(t) {
  return t > extension_t3 ? Math.pow(t, 1 / 3) : t / extension_t2 + extension_lab_t0;
}

function extension_lab2xyz(t) {
  return t > extension_lab_t1 ? t * t * t : extension_t2 * (t - extension_lab_t0);
}

function extension_lrgb2rgb(x) {
  return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
}

function extension_rgb2lrgb(x) {
  return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
}

function extension_hclConvert(o) {
  if (o instanceof extension_Hcl) return new extension_Hcl(o.h, o.c, o.l, o.opacity);
  if (!(o instanceof extension_Lab)) o = extension_labConvert(o);
  if (o.a === 0 && o.b === 0) return new extension_Hcl(NaN, 0 < o.l && o.l < 100 ? 0 : NaN, o.l, o.opacity);
  var h = Math.atan2(o.b, o.a) * extension_math_degrees;
  return new extension_Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
}

function extension_lch(l, c, h, opacity) {
  return arguments.length === 1 ? extension_hclConvert(l) : new extension_Hcl(h, c, l, opacity == null ? 1 : opacity);
}

function extension_hcl(h, c, l, opacity) {
  return arguments.length === 1 ? extension_hclConvert(h) : new extension_Hcl(h, c, l, opacity == null ? 1 : opacity);
}

function extension_Hcl(h, c, l, opacity) {
  this.h = +h;
  this.c = +c;
  this.l = +l;
  this.opacity = +opacity;
}

function extension_hcl2lab(o) {
  if (isNaN(o.h)) return new extension_Lab(o.l, 0, 0, o.opacity);
  var h = o.h * extension_math_radians;
  return new extension_Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
}

extension_src_define(extension_Hcl, extension_hcl, extension_define_extend(extension_Color, {
  brighter(k) {
    return new extension_Hcl(this.h, this.c, this.l + extension_K * (k == null ? 1 : k), this.opacity);
  },
  darker(k) {
    return new extension_Hcl(this.h, this.c, this.l - extension_K * (k == null ? 1 : k), this.opacity);
  },
  rgb() {
    return extension_hcl2lab(this).rgb();
  }
}));

;// ../../node_modules/d3-interpolate/src/lab.js



function extension_lab_lab(start, end) {
  var l = extension_nogamma((start = extension_lab(start)).l, (end = extension_lab(end)).l),
      a = extension_nogamma(start.a, end.a),
      b = extension_nogamma(start.b, end.b),
      opacity = extension_nogamma(start.opacity, end.opacity);
  return function(t) {
    start.l = l(t);
    start.a = a(t);
    start.b = b(t);
    start.opacity = opacity(t);
    return start + "";
  };
}

;// ../../node_modules/d3-interpolate/src/hcl.js



function extension_hcl_hcl(hue) {
  return function(start, end) {
    var h = hue((start = extension_hcl(start)).h, (end = extension_hcl(end)).h),
        c = extension_nogamma(start.c, end.c),
        l = extension_nogamma(start.l, end.l),
        opacity = extension_nogamma(start.opacity, end.opacity);
    return function(t) {
      start.h = h(t);
      start.c = c(t);
      start.l = l(t);
      start.opacity = opacity(t);
      return start + "";
    };
  }
}

/* harmony default export */ const extension_src_hcl = (extension_hcl_hcl(extension_hue));
var extension_hclLong = extension_hcl_hcl(extension_nogamma);

;// ../../node_modules/d3-color/src/cubehelix.js




var extension_A = -0.14861,
    extension_B = +1.78277,
    extension_C = -0.29227,
    extension_D = -0.90649,
    extension_E = +1.97294,
    extension_ED = extension_E * extension_D,
    extension_EB = extension_E * extension_B,
    extension_BC_DA = extension_B * extension_C - extension_D * extension_A;

function extension_cubehelixConvert(o) {
  if (o instanceof extension_Cubehelix) return new extension_Cubehelix(o.h, o.s, o.l, o.opacity);
  if (!(o instanceof extension_Rgb)) o = extension_rgbConvert(o);
  var r = o.r / 255,
      g = o.g / 255,
      b = o.b / 255,
      l = (extension_BC_DA * b + extension_ED * r - extension_EB * g) / (extension_BC_DA + extension_ED - extension_EB),
      bl = b - l,
      k = (extension_E * (g - l) - extension_C * bl) / extension_D,
      s = Math.sqrt(k * k + bl * bl) / (extension_E * l * (1 - l)), // NaN if l=0 or l=1
      h = s ? Math.atan2(k, bl) * extension_math_degrees - 120 : NaN;
  return new extension_Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
}

function extension_cubehelix_cubehelix(h, s, l, opacity) {
  return arguments.length === 1 ? extension_cubehelixConvert(h) : new extension_Cubehelix(h, s, l, opacity == null ? 1 : opacity);
}

function extension_Cubehelix(h, s, l, opacity) {
  this.h = +h;
  this.s = +s;
  this.l = +l;
  this.opacity = +opacity;
}

extension_src_define(extension_Cubehelix, extension_cubehelix_cubehelix, extension_define_extend(extension_Color, {
  brighter(k) {
    k = k == null ? extension_brighter : Math.pow(extension_brighter, k);
    return new extension_Cubehelix(this.h, this.s, this.l * k, this.opacity);
  },
  darker(k) {
    k = k == null ? extension_darker : Math.pow(extension_darker, k);
    return new extension_Cubehelix(this.h, this.s, this.l * k, this.opacity);
  },
  rgb() {
    var h = isNaN(this.h) ? 0 : (this.h + 120) * extension_math_radians,
        l = +this.l,
        a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
        cosh = Math.cos(h),
        sinh = Math.sin(h);
    return new extension_Rgb(
      255 * (l + a * (extension_A * cosh + extension_B * sinh)),
      255 * (l + a * (extension_C * cosh + extension_D * sinh)),
      255 * (l + a * (extension_E * cosh)),
      this.opacity
    );
  }
}));

;// ../../node_modules/d3-interpolate/src/cubehelix.js



function extension_cubehelix(hue) {
  return (function cubehelixGamma(y) {
    y = +y;

    function cubehelix(start, end) {
      var h = hue((start = extension_cubehelix_cubehelix(start)).h, (end = extension_cubehelix_cubehelix(end)).h),
          s = extension_nogamma(start.s, end.s),
          l = extension_nogamma(start.l, end.l),
          opacity = extension_nogamma(start.opacity, end.opacity);
      return function(t) {
        start.h = h(t);
        start.s = s(t);
        start.l = l(Math.pow(t, y));
        start.opacity = opacity(t);
        return start + "";
      };
    }

    cubehelix.gamma = cubehelixGamma;

    return cubehelix;
  })(1);
}

/* harmony default export */ const extension_src_cubehelix = (extension_cubehelix(extension_hue));
var extension_cubehelixLong = extension_cubehelix(extension_nogamma);

;// ../../node_modules/d3-interpolate/src/quantize.js
/* harmony default export */ function extension_src_quantize(interpolator, n) {
  var samples = new Array(n);
  for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
  return samples;
}

;// ../../node_modules/d3-interpolate/src/index.js






















;// ../../node_modules/d3-scale-chromatic/src/colors.js
/* harmony default export */ function extension_colors(specifier) {
  var n = specifier.length / 6 | 0, colors = new Array(n), i = 0;
  while (i < n) colors[i] = "#" + specifier.slice(i * 6, ++i * 6);
  return colors;
}

;// ../../node_modules/d3-scale-chromatic/src/categorical/Accent.js


/* harmony default export */ const extension_Accent = (extension_colors("7fc97fbeaed4fdc086ffff99386cb0f0027fbf5b17666666"));

;// ../../node_modules/d3-scale-chromatic/src/categorical/category10.js


/* harmony default export */ const extension_category10 = (extension_colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf"));

;// ../../node_modules/d3-scale-chromatic/src/categorical/Dark2.js


/* harmony default export */ const extension_Dark2 = (extension_colors("1b9e77d95f027570b3e7298a66a61ee6ab02a6761d666666"));

;// ../../node_modules/d3-scale-chromatic/src/categorical/observable10.js


/* harmony default export */ const extension_observable10 = (extension_colors("4269d0efb118ff725c6cc5b03ca951ff8ab7a463f297bbf59c6b4e9498a0"));

;// ../../node_modules/d3-scale-chromatic/src/categorical/Paired.js


/* harmony default export */ const extension_Paired = (extension_colors("a6cee31f78b4b2df8a33a02cfb9a99e31a1cfdbf6fff7f00cab2d66a3d9affff99b15928"));

;// ../../node_modules/d3-scale-chromatic/src/categorical/Pastel1.js


/* harmony default export */ const extension_Pastel1 = (extension_colors("fbb4aeb3cde3ccebc5decbe4fed9a6ffffcce5d8bdfddaecf2f2f2"));

;// ../../node_modules/d3-scale-chromatic/src/categorical/Pastel2.js


/* harmony default export */ const extension_Pastel2 = (extension_colors("b3e2cdfdcdaccbd5e8f4cae4e6f5c9fff2aef1e2cccccccc"));

;// ../../node_modules/d3-scale-chromatic/src/categorical/Set1.js


/* harmony default export */ const extension_Set1 = (extension_colors("e41a1c377eb84daf4a984ea3ff7f00ffff33a65628f781bf999999"));

;// ../../node_modules/d3-scale-chromatic/src/categorical/Set2.js


/* harmony default export */ const extension_Set2 = (extension_colors("66c2a5fc8d628da0cbe78ac3a6d854ffd92fe5c494b3b3b3"));

;// ../../node_modules/d3-scale-chromatic/src/categorical/Set3.js


/* harmony default export */ const extension_Set3 = (extension_colors("8dd3c7ffffb3bebadafb807280b1d3fdb462b3de69fccde5d9d9d9bc80bdccebc5ffed6f"));

;// ../../node_modules/vega-scale/build/vega-scale.module.js









function extension_bandSpace (count, paddingInner, paddingOuter) {
  const space = count - paddingInner + paddingOuter * 2;
  return count ? space > 0 ? space : 1 : 0;
}

const extension_Identity = 'identity';
const extension_vega_scale_module_Linear = 'linear';
const extension_Log = 'log';
const extension_Pow = 'pow';
const extension_Sqrt = 'sqrt';
const extension_Symlog = 'symlog';
const extension_vega_scale_module_Time = 'time';
const extension_UTC = 'utc';
const extension_Sequential = 'sequential';
const extension_Diverging = 'diverging';
const extension_vega_scale_module_Quantile = 'quantile';
const extension_Quantize = 'quantize';
const extension_Threshold = 'threshold';
const extension_Ordinal = 'ordinal';
const extension_Point = 'point';
const extension_Band = 'band';
const extension_BinOrdinal = 'bin-ordinal';

// categories
const extension_Continuous = 'continuous';
const extension_Discrete = 'discrete';
const extension_Discretizing = 'discretizing';
const extension_Interpolating = 'interpolating';
const extension_Temporal = 'temporal';

function extension_invertRange (scale) {
  return function (_) {
    let lo = _[0],
      hi = _[1],
      t;
    if (hi < lo) {
      t = lo;
      lo = hi;
      hi = t;
    }
    return [scale.invert(lo), scale.invert(hi)];
  };
}

function extension_invertRangeExtent (scale) {
  return function (_) {
    const range = scale.range();
    let lo = _[0],
      hi = _[1],
      min = -1,
      max,
      t,
      i,
      n;
    if (hi < lo) {
      t = lo;
      lo = hi;
      hi = t;
    }
    for (i = 0, n = range.length; i < n; ++i) {
      if (range[i] >= lo && range[i] <= hi) {
        if (min < 0) min = i;
        max = i;
      }
    }
    if (min < 0) return undefined;
    lo = scale.invertExtent(range[min]);
    hi = scale.invertExtent(range[max]);
    return [lo[0] === undefined ? lo[1] : lo[0], hi[1] === undefined ? hi[0] : hi[1]];
  };
}

function extension_band() {
  const scale = extension_ordinal().unknown(undefined),
    domain = scale.domain,
    ordinalRange = scale.range;
  let range$1 = [0, 1],
    step,
    bandwidth,
    round = false,
    paddingInner = 0,
    paddingOuter = 0,
    align = 0.5;
  delete scale.unknown;
  function rescale() {
    const n = domain().length,
      reverse = range$1[1] < range$1[0],
      stop = range$1[1 - reverse],
      space = extension_bandSpace(n, paddingInner, paddingOuter);
    let start = range$1[reverse - 0];
    step = (stop - start) / (space || 1);
    if (round) {
      step = Math.floor(step);
    }
    start += (stop - start - step * (n - paddingInner)) * align;
    bandwidth = step * (1 - paddingInner);
    if (round) {
      start = Math.round(start);
      bandwidth = Math.round(bandwidth);
    }
    const values = extension_range_range(n).map(i => start + step * i);
    return ordinalRange(reverse ? values.reverse() : values);
  }
  scale.domain = function (_) {
    if (arguments.length) {
      domain(_);
      return rescale();
    } else {
      return domain();
    }
  };
  scale.range = function (_) {
    if (arguments.length) {
      range$1 = [+_[0], +_[1]];
      return rescale();
    } else {
      return range$1.slice();
    }
  };
  scale.rangeRound = function (_) {
    range$1 = [+_[0], +_[1]];
    round = true;
    return rescale();
  };
  scale.bandwidth = function () {
    return bandwidth;
  };
  scale.step = function () {
    return step;
  };
  scale.round = function (_) {
    if (arguments.length) {
      round = !!_;
      return rescale();
    } else {
      return round;
    }
  };
  scale.padding = function (_) {
    if (arguments.length) {
      paddingOuter = Math.max(0, Math.min(1, _));
      paddingInner = paddingOuter;
      return rescale();
    } else {
      return paddingInner;
    }
  };
  scale.paddingInner = function (_) {
    if (arguments.length) {
      paddingInner = Math.max(0, Math.min(1, _));
      return rescale();
    } else {
      return paddingInner;
    }
  };
  scale.paddingOuter = function (_) {
    if (arguments.length) {
      paddingOuter = Math.max(0, Math.min(1, _));
      return rescale();
    } else {
      return paddingOuter;
    }
  };
  scale.align = function (_) {
    if (arguments.length) {
      align = Math.max(0, Math.min(1, _));
      return rescale();
    } else {
      return align;
    }
  };
  scale.invertRange = function (_) {
    // bail if range has null or undefined values
    if (_[0] == null || _[1] == null) return;
    const reverse = range$1[1] < range$1[0],
      values = reverse ? ordinalRange().reverse() : ordinalRange(),
      n = values.length - 1;
    let lo = +_[0],
      hi = +_[1],
      a,
      b,
      t;

    // bail if either range endpoint is invalid
    if (lo !== lo || hi !== hi) return;

    // order range inputs, bail if outside of scale range
    if (hi < lo) {
      t = lo;
      lo = hi;
      hi = t;
    }
    if (hi < values[0] || lo > range$1[1 - reverse]) return;

    // binary search to index into scale range
    a = Math.max(0, extension_bisectRight(values, lo) - 1);
    b = lo === hi ? a : extension_bisectRight(values, hi) - 1;

    // increment index a if lo is within padding gap
    if (lo - values[a] > bandwidth + 1e-10) ++a;
    if (reverse) {
      // map + swap
      t = a;
      a = n - b;
      b = n - t;
    }
    return a > b ? undefined : domain().slice(a, b + 1);
  };
  scale.invert = function (_) {
    const value = scale.invertRange([_, _]);
    return value ? value[0] : value;
  };
  scale.copy = function () {
    return extension_band().domain(domain()).range(range$1).round(round).paddingInner(paddingInner).paddingOuter(paddingOuter).align(align);
  };
  return rescale();
}
function extension_pointish(scale) {
  const copy = scale.copy;
  scale.padding = scale.paddingOuter;
  delete scale.paddingInner;
  scale.copy = function () {
    return extension_pointish(copy());
  };
  return scale;
}
function extension_vega_scale_module_point() {
  return extension_pointish(extension_band().paddingInner(1));
}

var extension_vega_scale_module_map = Array.prototype.map;
function extension_vega_scale_module_numbers(_) {
  return extension_vega_scale_module_map.call(_, extension_toNumber);
}

const extension_vega_scale_module_slice = Array.prototype.slice;

function extension_scaleBinOrdinal() {
  let domain = [],
    range = [];
  function scale(x) {
    return x == null || x !== x ? undefined : range[(extension_src_bisect(domain, x) - 1) % range.length];
  }
  scale.domain = function (_) {
    if (arguments.length) {
      domain = extension_vega_scale_module_numbers(_);
      return scale;
    } else {
      return domain.slice();
    }
  };
  scale.range = function (_) {
    if (arguments.length) {
      range = extension_vega_scale_module_slice.call(_);
      return scale;
    } else {
      return range.slice();
    }
  };
  scale.tickFormat = function (count, specifier) {
    return extension_tickFormat(domain[0], extension_peek(domain), count == null ? 10 : count, specifier);
  };
  scale.copy = function () {
    return extension_scaleBinOrdinal().domain(scale.domain()).range(scale.range());
  };
  return scale;
}

/** Private scale registry: should not be exported */
const extension_scales = new Map();
const extension_VEGA_SCALE = Symbol('vega_scale');
function extension_registerScale(scale) {
  scale[extension_VEGA_SCALE] = true;
  return scale;
}

/**
 * Return true if object was created by a constructor from the vega-scale `scale` function.
 */
function extension_isRegisteredScale(scale) {
  return scale && scale[extension_VEGA_SCALE] === true;
}

/**
 * Augment scales with their type and needed inverse methods.
 */
function extension_create(type, constructor, metadata) {
  const ctr = function scale() {
    const s = constructor();
    if (!s.invertRange) {
      s.invertRange = s.invert ? extension_invertRange(s) : s.invertExtent ? extension_invertRangeExtent(s) : undefined;
    }
    s.type = type;
    return extension_registerScale(s);
  };
  ctr.metadata = extension_toSet(extension_vega_util_module_array(metadata));
  return ctr;
}

/**
 * Registry function for adding and accessing scale constructor functions.
 * The *type* argument is a String indicating the name of the scale type.
 *
 * If the *scale* argument is not specified, this method returns the matching scale constructor in the registry, or `null` if not found.
 * If the *scale* argument is provided, it must be a scale constructor function to add to the registry under the given *type* name.
 * The *metadata* argument provides additional information to guide appropriate use of scales within Vega.
 *
 *  *metadata* can be either a string or string array. The valid string values are:
 * - `"continuous"` - the scale is defined over a continuous-valued domain.
 * - `"discrete"` - the scale is defined over a discrete domain and range.
 * - `"discretizing"` - the scale discretizes a continuous domain to a discrete range.
 * - `"interpolating"` - the scale range is defined using a color interpolator.
 * - `"log"` - the scale performs a logarithmic transform of the continuous domain.
 * - `"temporal"` - the scale domain is defined over date-time values.
 */
function extension_vega_scale_module_scale(type, scale, metadata) {
  if (arguments.length > 1) {
    extension_scales.set(type, extension_create(type, scale, metadata));
    return this;
  } else {
    return extension_isValidScaleType(type) ? extension_scales.get(type) : undefined;
  }
}

// identity scale
extension_vega_scale_module_scale(extension_Identity, extension_identity_identity);

// continuous scales
extension_vega_scale_module_scale(extension_vega_scale_module_Linear, extension_linear_linear, extension_Continuous);
extension_vega_scale_module_scale(extension_Log, extension_log_log, [extension_Continuous, extension_Log]);
extension_vega_scale_module_scale(extension_Pow, extension_pow_pow, extension_Continuous);
extension_vega_scale_module_scale(extension_Sqrt, extension_pow_sqrt, extension_Continuous);
extension_vega_scale_module_scale(extension_Symlog, extension_symlog_symlog, extension_Continuous);
extension_vega_scale_module_scale(extension_vega_scale_module_Time, extension_time, [extension_Continuous, extension_Temporal]);
extension_vega_scale_module_scale(extension_UTC, extension_utcTime, [extension_Continuous, extension_Temporal]);

// sequential scales
extension_vega_scale_module_scale(extension_Sequential, extension_sequential, [extension_Continuous, extension_Interpolating]); // backwards compat
extension_vega_scale_module_scale(`${extension_Sequential}-${extension_vega_scale_module_Linear}`, extension_sequential, [extension_Continuous, extension_Interpolating]);
extension_vega_scale_module_scale(`${extension_Sequential}-${extension_Log}`, extension_sequentialLog, [extension_Continuous, extension_Interpolating, extension_Log]);
extension_vega_scale_module_scale(`${extension_Sequential}-${extension_Pow}`, extension_sequentialPow, [extension_Continuous, extension_Interpolating]);
extension_vega_scale_module_scale(`${extension_Sequential}-${extension_Sqrt}`, extension_sequentialSqrt, [extension_Continuous, extension_Interpolating]);
extension_vega_scale_module_scale(`${extension_Sequential}-${extension_Symlog}`, extension_sequentialSymlog, [extension_Continuous, extension_Interpolating]);

// diverging scales
extension_vega_scale_module_scale(`${extension_Diverging}-${extension_vega_scale_module_Linear}`, extension_diverging, [extension_Continuous, extension_Interpolating]);
extension_vega_scale_module_scale(`${extension_Diverging}-${extension_Log}`, extension_divergingLog, [extension_Continuous, extension_Interpolating, extension_Log]);
extension_vega_scale_module_scale(`${extension_Diverging}-${extension_Pow}`, extension_divergingPow, [extension_Continuous, extension_Interpolating]);
extension_vega_scale_module_scale(`${extension_Diverging}-${extension_Sqrt}`, extension_divergingSqrt, [extension_Continuous, extension_Interpolating]);
extension_vega_scale_module_scale(`${extension_Diverging}-${extension_Symlog}`, extension_divergingSymlog, [extension_Continuous, extension_Interpolating]);

// discretizing scales
extension_vega_scale_module_scale(extension_vega_scale_module_Quantile, extension_src_quantile_quantile, [extension_Discretizing, extension_vega_scale_module_Quantile]);
extension_vega_scale_module_scale(extension_Quantize, extension_quantize, extension_Discretizing);
extension_vega_scale_module_scale(extension_Threshold, extension_threshold, extension_Discretizing);

// discrete scales
extension_vega_scale_module_scale(extension_BinOrdinal, extension_scaleBinOrdinal, [extension_Discrete, extension_Discretizing]);
extension_vega_scale_module_scale(extension_Ordinal, extension_ordinal, extension_Discrete);
extension_vega_scale_module_scale(extension_Band, extension_band, extension_Discrete);
extension_vega_scale_module_scale(extension_Point, extension_vega_scale_module_point, extension_Discrete);
function extension_isValidScaleType(type) {
  return extension_scales.has(type);
}
function extension_hasType(key, type) {
  const s = extension_scales.get(key);
  return s && s.metadata[type];
}
function extension_isContinuous(key) {
  return extension_hasType(key, extension_Continuous);
}
function extension_isDiscrete(key) {
  return extension_hasType(key, extension_Discrete);
}
function extension_isDiscretizing(key) {
  return extension_hasType(key, extension_Discretizing);
}
function extension_isLogarithmic(key) {
  return extension_hasType(key, extension_Log);
}
function extension_isTemporal(key) {
  return extension_hasType(key, extension_Temporal);
}
function extension_isInterpolating(key) {
  return extension_hasType(key, extension_Interpolating);
}
function extension_isQuantile(key) {
  return extension_hasType(key, extension_vega_scale_module_Quantile);
}

const extension_scaleProps = ['clamp', 'base', 'constant', 'exponent'];
function extension_interpolateRange(interpolator, range) {
  const start = range[0],
    span = extension_peek(range) - start;
  return function (i) {
    return interpolator(start + i * span);
  };
}
function extension_interpolateColors(colors, type, gamma) {
  return extension_piecewise(extension_interpolate(type || 'rgb', gamma), colors);
}
function extension_quantizeInterpolator(interpolator, count) {
  const samples = new Array(count),
    n = count + 1;
  for (let i = 0; i < count;) samples[i] = interpolator(++i / n);
  return samples;
}
function extension_scaleCopy(scale) {
  const t = scale.type,
    s = scale.copy();
  s.type = t;
  return s;
}
function extension_scaleFraction(scale$1, min, max) {
  const delta = max - min;
  let i, t, s;
  if (!delta || !Number.isFinite(delta)) {
    return extension_vega_util_module_constant(0.5);
  } else {
    i = (t = scale$1.type).indexOf('-');
    t = i < 0 ? t : t.slice(i + 1);
    s = extension_vega_scale_module_scale(t)().domain([min, max]).range([0, 1]);
    extension_scaleProps.forEach(m => scale$1[m] ? s[m](scale$1[m]()) : 0);
    return s;
  }
}
function extension_interpolate(type, gamma) {
  const interp = extension_d3_interpolate_src_namespaceObject[extension_method(type)];
  return gamma != null && interp && interp.gamma ? interp.gamma(gamma) : interp;
}
function extension_method(type) {
  return 'interpolate' + type.toLowerCase().split('-').map(s => s[0].toUpperCase() + s.slice(1)).join('');
}

const extension_vega_scale_module_continuous = {
  blues: 'cfe1f2bed8eca8cee58fc1de74b2d75ba3cf4592c63181bd206fb2125ca40a4a90',
  greens: 'd3eecdc0e6baabdda594d3917bc77d60ba6c46ab5e329a512089430e7735036429',
  greys: 'e2e2e2d4d4d4c4c4c4b1b1b19d9d9d8888887575756262624d4d4d3535351e1e1e',
  oranges: 'fdd8b3fdc998fdb87bfda55efc9244f87f2cf06b18e4580bd14904b93d029f3303',
  purples: 'e2e1efd4d4e8c4c5e0b4b3d6a3a0cc928ec3827cb97566ae684ea25c3696501f8c',
  reds: 'fdc9b4fcb49afc9e80fc8767fa7051f6573fec3f2fdc2a25c81b1db21218970b13',
  blueGreen: 'd5efedc1e8e0a7ddd18bd2be70c6a958ba9144ad77319c5d2089460e7736036429',
  bluePurple: 'ccddecbad0e4a8c2dd9ab0d4919cc98d85be8b6db28a55a6873c99822287730f71',
  greenBlue: 'd3eecec5e8c3b1e1bb9bd8bb82cec269c2ca51b2cd3c9fc7288abd1675b10b60a1',
  orangeRed: 'fddcaffdcf9bfdc18afdad77fb9562f67d53ee6545e24932d32d1ebf130da70403',
  purpleBlue: 'dbdaebc8cee4b1c3de97b7d87bacd15b9fc93a90c01e7fb70b70ab056199045281',
  purpleBlueGreen: 'dbd8eac8cee4b0c3de93b7d872acd1549fc83892bb1c88a3097f8702736b016353',
  purpleRed: 'dcc9e2d3b3d7ce9eccd186c0da6bb2e14da0e23189d91e6fc61159ab07498f023a',
  redPurple: 'fccfccfcbec0faa9b8f98faff571a5ec539ddb3695c41b8aa908808d0179700174',
  yellowGreen: 'e4f4acd1eca0b9e2949ed68880c97c62bb6e47aa5e3297502083440e723b036034',
  yellowOrangeBrown: 'feeaa1fedd84fecc63feb746fca031f68921eb7215db5e0bc54c05ab3d038f3204',
  yellowOrangeRed: 'fee087fed16ffebd59fea849fd903efc7335f9522bee3423de1b20ca0b22af0225',
  blueOrange: '134b852f78b35da2cb9dcae1d2e5eff2f0ebfce0bafbbf74e8932fc5690d994a07',
  brownBlueGreen: '704108a0651ac79548e3c78af3e6c6eef1eac9e9e48ed1c74da79e187a72025147',
  purpleGreen: '5b1667834792a67fb6c9aed3e6d6e8eff0efd9efd5aedda971bb75368e490e5e29',
  purpleOrange: '4114696647968f83b7b9b4d6dadbebf3eeeafce0bafbbf74e8932fc5690d994a07',
  redBlue: '8c0d25bf363adf745ef4ae91fbdbc9f2efeed2e5ef9dcae15da2cb2f78b3134b85',
  redGrey: '8c0d25bf363adf745ef4ae91fcdccbfaf4f1e2e2e2c0c0c0969696646464343434',
  yellowGreenBlue: 'eff9bddbf1b4bde5b594d5b969c5be45b4c22c9ec02182b82163aa23479c1c3185',
  redYellowBlue: 'a50026d4322cf16e43fcac64fedd90faf8c1dcf1ecabd6e875abd04a74b4313695',
  redYellowGreen: 'a50026d4322cf16e43fcac63fedd8df9f7aed7ee8ea4d86e64bc6122964f006837',
  pinkYellowGreen: '8e0152c0267edd72adf0b3d6faddedf5f3efe1f2cab6de8780bb474f9125276419',
  spectral: '9e0142d13c4bf0704afcac63fedd8dfbf8b0e0f3a1a9dda269bda94288b55e4fa2',
  viridis: '440154470e61481a6c482575472f7d443a834144873d4e8a39568c35608d31688e2d708e2a788e27818e23888e21918d1f988b1fa08822a8842ab07f35b77943bf7154c56866cc5d7ad1518fd744a5db36bcdf27d2e21be9e51afde725',
  magma: '0000040404130b0924150e3720114b2c11603b0f704a107957157e651a80721f817f24828c29819a2e80a8327db6377ac43c75d1426fde4968e95462f1605df76f5cfa7f5efc8f65fe9f6dfeaf78febf84fece91fddea0fcedaffcfdbf',
  inferno: '0000040403130c0826170c3b240c4f330a5f420a68500d6c5d126e6b176e781c6d86216b932667a12b62ae305cbb3755c73e4cd24644dd513ae65c30ed6925f3771af8850ffb9506fca50afcb519fac62df6d645f2e661f3f484fcffa4',
  plasma: '0d088723069033059742039d5002a25d01a66a00a87801a88405a7900da49c179ea72198b12a90ba3488c33d80cb4779d35171da5a69e16462e76e5bed7953f2834cf68f44fa9a3dfca636fdb32ffec029fcce25f9dc24f5ea27f0f921',
  cividis: '00205100235800265d002961012b65042e670831690d346b11366c16396d1c3c6e213f6e26426e2c456e31476e374a6e3c4d6e42506e47536d4c566d51586e555b6e5a5e6e5e616e62646f66676f6a6a706e6d717270717573727976737c79747f7c75827f758682768985778c8877908b78938e789691789a94789e9778a19b78a59e77a9a177aea575b2a874b6ab73bbaf71c0b26fc5b66dc9b96acebd68d3c065d8c462ddc85fe2cb5ce7cf58ebd355f0d652f3da4ff7de4cfae249fce647',
  rainbow: '6e40aa883eb1a43db3bf3cafd83fa4ee4395fe4b83ff576eff6659ff7847ff8c38f3a130e2b72fcfcc36bee044aff05b8ff4576ff65b52f6673af27828ea8d1ddfa319d0b81cbecb23abd82f96e03d82e14c6edb5a5dd0664dbf6e40aa',
  sinebow: 'ff4040fc582af47218e78d0bd5a703bfbf00a7d5038de70b72f41858fc2a40ff402afc5818f4720be78d03d5a700bfbf03a7d50b8de71872f42a58fc4040ff582afc7218f48d0be7a703d5bf00bfd503a7e70b8df41872fc2a58ff4040',
  turbo: '23171b32204a3e2a71453493493eae4b49c54a53d7485ee44569ee4074f53c7ff8378af93295f72e9ff42ba9ef28b3e926bce125c5d925cdcf27d5c629dcbc2de3b232e9a738ee9d3ff39347f68950f9805afc7765fd6e70fe667cfd5e88fc5795fb51a1f84badf545b9f140c5ec3cd0e637dae034e4d931ecd12ef4c92bfac029ffb626ffad24ffa223ff9821ff8d1fff821dff771cfd6c1af76118f05616e84b14df4111d5380fcb2f0dc0260ab61f07ac1805a313029b0f00950c00910b00',
  browns: 'eedbbdecca96e9b97ae4a865dc9856d18954c7784cc0673fb85536ad44339f3632',
  tealBlues: 'bce4d89dd3d181c3cb65b3c245a2b9368fae347da0306a932c5985',
  teals: 'bbdfdfa2d4d58ac9c975bcbb61b0af4da5a43799982b8b8c1e7f7f127273006667',
  warmGreys: 'dcd4d0cec5c1c0b8b4b3aaa7a59c9998908c8b827f7e7673726866665c5a59504e',
  goldGreen: 'f4d166d5ca60b6c35c98bb597cb25760a6564b9c533f8f4f33834a257740146c36',
  goldOrange: 'f4d166f8be5cf8aa4cf5983bf3852aef701be2621fd65322c54923b142239e3a26',
  goldRed: 'f4d166f6be59f9aa51fc964ef6834bee734ae56249db5247cf4244c43141b71d3e',
  lightGreyRed: 'efe9e6e1dad7d5cbc8c8bdb9bbaea9cd967ddc7b43e15f19df4011dc000b',
  lightGreyTeal: 'e4eaead6dcddc8ced2b7c2c7a6b4bc64b0bf22a6c32295c11f85be1876bc',
  lightMulti: 'e0f1f2c4e9d0b0de9fd0e181f6e072f6c053f3993ef77440ef4a3c',
  lightOrange: 'f2e7daf7d5baf9c499fab184fa9c73f68967ef7860e8645bde515bd43d5b',
  lightTealBlue: 'e3e9e0c0dccf9aceca7abfc859afc0389fb9328dad2f7ca0276b95255988',
  darkBlue: '3232322d46681a5c930074af008cbf05a7ce25c0dd38daed50f3faffffff',
  darkGold: '3c3c3c584b37725e348c7631ae8b2bcfa424ecc31ef9de30fff184ffffff',
  darkGreen: '3a3a3a215748006f4d048942489e4276b340a6c63dd2d836ffeb2cffffaa',
  darkMulti: '3737371f5287197d8c29a86995ce3fffe800ffffff',
  darkRed: '3434347036339e3c38cc4037e75d1eec8620eeab29f0ce32ffeb2c'
};
const extension_vega_scale_module_discrete = {
  accent: extension_Accent,
  category10: extension_category10,
  category20: '1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5',
  category20b: '393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6',
  category20c: '3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9',
  dark2: extension_Dark2,
  observable10: extension_observable10,
  paired: extension_Paired,
  pastel1: extension_Pastel1,
  pastel2: extension_Pastel2,
  set1: extension_Set1,
  set2: extension_Set2,
  set3: extension_Set3,
  tableau10: '4c78a8f58518e4575672b7b254a24beeca3bb279a2ff9da69d755dbab0ac',
  tableau20: '4c78a89ecae9f58518ffbf7954a24b88d27ab79a20f2cf5b43989483bcb6e45756ff9d9879706ebab0acd67195fcbfd2b279a2d6a5c99e765fd8b5a5'
};

function extension_vega_scale_module_colors(palette) {
  if (extension_vega_util_module_isArray(palette)) return palette;
  const n = palette.length / 6 | 0,
    c = new Array(n);
  for (let i = 0; i < n;) {
    c[i] = '#' + palette.slice(i * 6, ++i * 6);
  }
  return c;
}
function extension_apply(_, f) {
  for (const k in _) extension_scheme(k, f(_[k]));
}
const extension_schemes = {};
extension_apply(extension_vega_scale_module_discrete, extension_vega_scale_module_colors);
extension_apply(extension_vega_scale_module_continuous, _ => extension_interpolateColors(extension_vega_scale_module_colors(_)));
function extension_scheme(name, scheme) {
  name = name && name.toLowerCase();
  if (arguments.length > 1) {
    extension_schemes[name] = scheme;
    return this;
  } else {
    return extension_schemes[name];
  }
}

const extension_SymbolLegend = 'symbol';
const extension_DiscreteLegend = 'discrete';
const extension_GradientLegend = 'gradient';

const extension_vega_scale_module_defaultFormatter = value => extension_vega_util_module_isArray(value) ? value.map(v => String(v)) : String(value);
const extension_vega_scale_module_ascending = (a, b) => a[1] - b[1];
const extension_vega_scale_module_descending = (a, b) => b[1] - a[1];

/**
 * Determine the tick count or interval function.
 * @param {Scale} scale - The scale for which to generate tick values.
 * @param {*} count - The desired tick count or interval specifier.
 * @param {number} minStep - The desired minimum step between tick values.
 * @return {*} - The tick count or interval function.
 */
function extension_tickCount(scale, count, minStep) {
  let step;
  if (extension_vega_util_module_isNumber(count)) {
    if (scale.bins) {
      count = Math.max(count, scale.bins.length);
    }
    if (minStep != null) {
      count = Math.min(count, Math.floor(extension_span(scale.domain()) / minStep || 1) + 1);
    }
  }
  if (extension_vega_util_module_isObject(count)) {
    step = count.step;
    count = count.interval;
  }
  if (extension_vega_util_module_isString(count)) {
    count = scale.type === extension_vega_scale_module_Time ? extension_vega_time_module_timeInterval(count) : scale.type == extension_UTC ? extension_utcInterval(count) : extension_vega_util_module_error('Only time and utc scales accept interval strings.');
    if (step) count = count.every(step);
  }
  return count;
}

/**
 * Filter a set of candidate tick values, ensuring that only tick values
 * that lie within the scale range are included.
 * @param {Scale} scale - The scale for which to generate tick values.
 * @param {Array<*>} ticks - The candidate tick values.
 * @param {*} count - The tick count or interval function.
 * @return {Array<*>} - The filtered tick values.
 */
function extension_validTicks(scale, ticks, count) {
  let range = scale.range(),
    lo = range[0],
    hi = extension_peek(range),
    cmp = extension_vega_scale_module_ascending;
  if (lo > hi) {
    range = hi;
    hi = lo;
    lo = range;
    cmp = extension_vega_scale_module_descending;
  }
  lo = Math.floor(lo);
  hi = Math.ceil(hi);

  // filter ticks to valid values within the range
  // additionally sort ticks in range order (#2579)
  ticks = ticks.map(v => [v, scale(v)]).filter(_ => lo <= _[1] && _[1] <= hi).sort(cmp).map(_ => _[0]);
  if (count > 0 && ticks.length > 1) {
    const endpoints = [ticks[0], extension_peek(ticks)];
    while (ticks.length > count && ticks.length >= 3) {
      ticks = ticks.filter((_, i) => !(i % 2));
    }
    if (ticks.length < 3) {
      ticks = endpoints;
    }
  }
  return ticks;
}

/**
 * Generate tick values for the given scale and approximate tick count or
 * interval value. If the scale has a 'ticks' method, it will be used to
 * generate the ticks, with the count argument passed as a parameter. If the
 * scale lacks a 'ticks' method, the full scale domain will be returned.
 * @param {Scale} scale - The scale for which to generate tick values.
 * @param {*} [count] - The approximate number of desired ticks.
 * @return {Array<*>} - The generated tick values.
 */
function extension_tickValues(scale, count) {
  return scale.bins ? extension_validTicks(scale, scale.bins, count) : scale.ticks ? scale.ticks(count) : scale.domain();
}

/**
 * Generate a label format function for a scale. If the scale has a
 * 'tickFormat' method, it will be used to generate the formatter, with the
 * count and specifier arguments passed as parameters. If the scale lacks a
 * 'tickFormat' method, the returned formatter performs simple string coercion.
 * If the input scale is a logarithmic scale and the format specifier does not
 * indicate a desired decimal precision, a special variable precision formatter
 * that automatically trims trailing zeroes will be generated.
 * @param {Scale} scale - The scale for which to generate the label formatter.
 * @param {*} [count] - The approximate number of desired ticks.
 * @param {string} [specifier] - The format specifier. Must be a legal d3
 *   specifier string (see https://github.com/d3/d3-format#formatSpecifier) or
 *   time multi-format specifier object.
 * @return {function(*):string} - The generated label formatter.
 */
function extension_vega_scale_module_tickFormat(locale, scale, count, specifier, formatType, noSkip) {
  const type = scale.type;
  let format = extension_vega_scale_module_defaultFormatter;
  if (type === extension_vega_scale_module_Time || formatType === extension_vega_scale_module_Time) {
    format = locale.timeFormat(specifier);
  } else if (type === extension_UTC || formatType === extension_UTC) {
    format = locale.utcFormat(specifier);
  } else if (extension_isLogarithmic(type)) {
    const varfmt = locale.formatFloat(specifier);
    if (noSkip || scale.bins) {
      format = varfmt;
    } else {
      const test = extension_tickLog(scale, count, false);
      format = _ => test(_) ? varfmt(_) : '';
    }
  } else if (scale.tickFormat) {
    // if d3 scale has tickFormat, it must be continuous
    const d = scale.domain();
    format = locale.formatSpan(d[0], d[d.length - 1], count, specifier);
  } else if (specifier) {
    format = locale.format(specifier);
  }
  return format;
}
function extension_tickLog(scale, count, values) {
  const ticks = extension_tickValues(scale, count),
    base = scale.base(),
    logb = Math.log(base),
    k = Math.max(1, base * count / ticks.length);

  // apply d3-scale's log format filter criteria
  const test = d => {
    let i = d / Math.pow(base, Math.round(Math.log(d) / logb));
    if (i * base < base - 0.5) i *= base;
    return i <= k;
  };
  return values ? ticks.filter(test) : test;
}

const extension_symbols = {
  [extension_vega_scale_module_Quantile]: 'quantiles',
  [extension_Quantize]: 'thresholds',
  [extension_Threshold]: 'domain'
};
const extension_vega_scale_module_formats = {
  [extension_vega_scale_module_Quantile]: 'quantiles',
  [extension_Quantize]: 'domain'
};
function extension_labelValues(scale, count) {
  return scale.bins ? extension_binValues(scale.bins) : scale.type === extension_Log ? extension_tickLog(scale, count, true) : extension_symbols[scale.type] ? extension_thresholdValues(scale[extension_symbols[scale.type]]()) : extension_tickValues(scale, count);
}
function extension_thresholdFormat(locale, scale, specifier) {
  const _ = scale[extension_vega_scale_module_formats[scale.type]](),
    n = _.length;
  let d = n > 1 ? _[1] - _[0] : _[0],
    i;
  for (i = 1; i < n; ++i) {
    d = Math.min(d, _[i] - _[i - 1]);
  }

  // tickCount = 3 ticks times 10 for increased resolution
  return locale.formatSpan(0, d, 3 * 10, specifier);
}
function extension_thresholdValues(thresholds) {
  const values = [-Infinity].concat(thresholds);
  values.max = +Infinity;
  return values;
}
function extension_binValues(bins) {
  const values = bins.slice(0, -1);
  values.max = extension_peek(bins);
  return values;
}
const extension_isDiscreteRange = scale => extension_symbols[scale.type] || scale.bins;
function extension_labelFormat(locale, scale, count, type, specifier, formatType, noSkip) {
  const format = extension_vega_scale_module_formats[scale.type] && formatType !== extension_vega_scale_module_Time && formatType !== extension_UTC ? extension_thresholdFormat(locale, scale, specifier) : extension_vega_scale_module_tickFormat(locale, scale, count, specifier, formatType, noSkip);
  return type === extension_SymbolLegend && extension_isDiscreteRange(scale) ? extension_formatRange(format) : type === extension_DiscreteLegend ? extension_formatDiscrete(format) : extension_formatPoint(format);
}
const extension_formatRange = format => (value, index, array) => {
  const limit = extension_vega_scale_module_get(array[index + 1], extension_vega_scale_module_get(array.max, +Infinity)),
    lo = extension_formatValue(value, format),
    hi = extension_formatValue(limit, format);
  return lo && hi ? lo + ' \u2013 ' + hi : hi ? '< ' + hi : '\u2265 ' + lo;
};
const extension_vega_scale_module_get = (value, dflt) => value != null ? value : dflt;
const extension_formatDiscrete = format => (value, index) => index ? format(value) : null;
const extension_formatPoint = format => value => format(value);
const extension_formatValue = (value, format) => Number.isFinite(value) ? format(value) : null;
function extension_labelFraction(scale) {
  const domain = scale.domain(),
    count = domain.length - 1;
  let lo = +domain[0],
    hi = +extension_peek(domain),
    span = hi - lo;
  if (scale.type === extension_Threshold) {
    const adjust = count ? span / count : 0.1;
    lo -= adjust;
    hi += adjust;
    span = hi - lo;
  }
  return value => (value - lo) / span;
}

function extension_vega_scale_module_format(locale, scale, specifier, formatType) {
  const type = formatType || scale.type;

  // replace abbreviated time specifiers to improve screen reader experience
  if (extension_vega_util_module_isString(specifier) && extension_isTemporal(type)) {
    specifier = specifier.replace(/%a/g, '%A').replace(/%b/g, '%B');
  }
  return !specifier && type === extension_vega_scale_module_Time ? locale.timeFormat('%A, %d %B %Y, %X') : !specifier && type === extension_UTC ? locale.utcFormat('%A, %d %B %Y, %X UTC') : extension_labelFormat(locale, scale, 5, null, specifier, formatType, true);
}
function extension_domainCaption(locale, scale, opt) {
  opt = opt || {};
  const max = Math.max(3, opt.maxlen || 7),
    fmt = extension_vega_scale_module_format(locale, scale, opt.format, opt.formatType);

  // if scale breaks domain into bins, describe boundaries
  if (extension_isDiscretizing(scale.type)) {
    const v = extension_labelValues(scale).slice(1).map(fmt),
      n = v.length;
    return `${n} boundar${n === 1 ? 'y' : 'ies'}: ${v.join(', ')}`;
  }

  // if scale domain is discrete, list values
  else if (extension_isDiscrete(scale.type)) {
    const d = scale.domain(),
      n = d.length,
      v = n > max ? d.slice(0, max - 2).map(fmt).join(', ') + ', ending with ' + d.slice(-1).map(fmt) : d.map(fmt).join(', ');
    return `${n} value${n === 1 ? '' : 's'}: ${v}`;
  }

  // if scale domain is continuous, describe value range
  else {
    const d = scale.domain();
    return `values from ${fmt(d[0])} to ${fmt(extension_peek(d))}`;
  }
}



;// ../../node_modules/vega-scenegraph/build/vega-scenegraph.module.js








let extension_gradient_id = 0;
function extension_resetSVGGradientId() {
  extension_gradient_id = 0;
}
const extension_patternPrefix = 'p_';
function extension_isGradient(value) {
  return value && value.gradient;
}
function extension_gradientRef(g, defs, base) {
  const type = g.gradient;
  let id = g.id,
    prefix = type === 'radial' ? extension_patternPrefix : '';

  // check id, assign default values as needed
  if (!id) {
    id = g.id = 'gradient_' + extension_gradient_id++;
    if (type === 'radial') {
      g.x1 = extension_vega_scenegraph_module_get(g.x1, 0.5);
      g.y1 = extension_vega_scenegraph_module_get(g.y1, 0.5);
      g.r1 = extension_vega_scenegraph_module_get(g.r1, 0);
      g.x2 = extension_vega_scenegraph_module_get(g.x2, 0.5);
      g.y2 = extension_vega_scenegraph_module_get(g.y2, 0.5);
      g.r2 = extension_vega_scenegraph_module_get(g.r2, 0.5);
      prefix = extension_patternPrefix;
    } else {
      g.x1 = extension_vega_scenegraph_module_get(g.x1, 0);
      g.y1 = extension_vega_scenegraph_module_get(g.y1, 0);
      g.x2 = extension_vega_scenegraph_module_get(g.x2, 1);
      g.y2 = extension_vega_scenegraph_module_get(g.y2, 0);
    }
  }

  // register definition
  defs[id] = g;

  // return url reference
  return 'url(' + (base || '') + '#' + prefix + id + ')';
}
function extension_vega_scenegraph_module_get(val, def) {
  return val != null ? val : def;
}
function extension_Gradient (p0, p1) {
  var stops = [],
    gradient;
  return gradient = {
    gradient: 'linear',
    x1: p0 ? p0[0] : 0,
    y1: p0 ? p0[1] : 0,
    x2: p1 ? p1[0] : 1,
    y2: p1 ? p1[1] : 0,
    stops: stops,
    stop: function (offset, color) {
      stops.push({
        offset: offset,
        color: color
      });
      return gradient;
    }
  };
}

const extension_vega_scenegraph_module_lookup = {
  'basis': {
    curve: extension_basis
  },
  'basis-closed': {
    curve: extension_basisClosed
  },
  'basis-open': {
    curve: extension_basisOpen
  },
  'bundle': {
    curve: extension_bundle,
    tension: 'beta',
    value: 0.85
  },
  'cardinal': {
    curve: extension_cardinal,
    tension: 'tension',
    value: 0
  },
  'cardinal-open': {
    curve: extension_cardinalOpen,
    tension: 'tension',
    value: 0
  },
  'cardinal-closed': {
    curve: extension_cardinalClosed,
    tension: 'tension',
    value: 0
  },
  'catmull-rom': {
    curve: extension_catmullRom,
    tension: 'alpha',
    value: 0.5
  },
  'catmull-rom-closed': {
    curve: extension_catmullRomClosed,
    tension: 'alpha',
    value: 0.5
  },
  'catmull-rom-open': {
    curve: extension_catmullRomOpen,
    tension: 'alpha',
    value: 0.5
  },
  'linear': {
    curve: extension_curve_linear
  },
  'linear-closed': {
    curve: extension_linearClosed
  },
  'monotone': {
    horizontal: extension_monotoneY,
    vertical: extension_monotoneX
  },
  'natural': {
    curve: extension_natural
  },
  'step': {
    curve: extension_step
  },
  'step-after': {
    curve: extension_stepAfter
  },
  'step-before': {
    curve: extension_stepBefore
  }
};
function extension_curves(type, orientation, tension) {
  var entry = extension_vega_util_module_has(extension_vega_scenegraph_module_lookup, type) && extension_vega_scenegraph_module_lookup[type],
    curve = null;
  if (entry) {
    curve = entry.curve || entry[orientation || 'vertical'];
    if (entry.tension && tension != null) {
      curve = curve[entry.tension](tension);
    }
  }
  return curve;
}

const extension_paramCounts = {
  m: 2,
  l: 2,
  h: 1,
  v: 1,
  z: 0,
  c: 6,
  s: 4,
  q: 4,
  t: 2,
  a: 7
};
const extension_commandPattern = /[mlhvzcsqta]([^mlhvzcsqta]+|$)/gi;
const extension_numberPattern = /^[+-]?(([0-9]*\.[0-9]+)|([0-9]+\.)|([0-9]+))([eE][+-]?[0-9]+)?/;
const extension_spacePattern = /^((\s+,?\s*)|(,\s*))/;
const extension_flagPattern = /^[01]/;
function extension_vega_scenegraph_module_parse(path) {
  const commands = [];
  const matches = path.match(extension_commandPattern) || [];
  matches.forEach(str => {
    let cmd = str[0];
    const type = cmd.toLowerCase();

    // parse parameters
    const paramCount = extension_paramCounts[type];
    const params = extension_parseParams(type, paramCount, str.slice(1).trim());
    const count = params.length;

    // error checking based on parameter count
    if (count < paramCount || count && count % paramCount !== 0) {
      throw Error('Invalid SVG path, incorrect parameter count');
    }

    // register the command
    commands.push([cmd, ...params.slice(0, paramCount)]);

    // exit now if we're done, also handles zero-param 'z'
    if (count === paramCount) {
      return;
    }

    // handle implicit line-to
    if (type === 'm') {
      cmd = cmd === 'M' ? 'L' : 'l';
    }

    // repeat command when given extended param list
    for (let i = paramCount; i < count; i += paramCount) {
      commands.push([cmd, ...params.slice(i, i + paramCount)]);
    }
  });
  return commands;
}
function extension_parseParams(type, paramCount, segment) {
  const params = [];
  for (let index = 0; paramCount && index < segment.length;) {
    for (let i = 0; i < paramCount; ++i) {
      const pattern = type === 'a' && (i === 3 || i === 4) ? extension_flagPattern : extension_numberPattern;
      const match = segment.slice(index).match(pattern);
      if (match === null) {
        throw Error('Invalid SVG path, incorrect parameter type');
      }
      index += match[0].length;
      params.push(+match[0]);
      const ws = segment.slice(index).match(extension_spacePattern);
      if (ws !== null) {
        index += ws[0].length;
      }
    }
  }
  return params;
}

const extension_DegToRad = Math.PI / 180;
const extension_Epsilon = 1e-14;
const extension_HalfPi = Math.PI / 2;
const extension_Tau = Math.PI * 2;
const extension_HalfSqrt3 = Math.sqrt(3) / 2;

var extension_segmentCache = {};
var extension_bezierCache = {};
var extension_vega_scenegraph_module_join = [].join;

// Copied from Inkscape svgtopdf, thanks!
function extension_segments(x, y, rx, ry, large, sweep, rotateX, ox, oy) {
  const key = extension_vega_scenegraph_module_join.call(arguments);
  if (extension_segmentCache[key]) {
    return extension_segmentCache[key];
  }
  const th = rotateX * extension_DegToRad;
  const sin_th = Math.sin(th);
  const cos_th = Math.cos(th);
  rx = Math.abs(rx);
  ry = Math.abs(ry);
  const px = cos_th * (ox - x) * 0.5 + sin_th * (oy - y) * 0.5;
  const py = cos_th * (oy - y) * 0.5 - sin_th * (ox - x) * 0.5;
  let pl = px * px / (rx * rx) + py * py / (ry * ry);
  if (pl > 1) {
    pl = Math.sqrt(pl);
    rx *= pl;
    ry *= pl;
  }
  const a00 = cos_th / rx;
  const a01 = sin_th / rx;
  const a10 = -sin_th / ry;
  const a11 = cos_th / ry;
  const x0 = a00 * ox + a01 * oy;
  const y0 = a10 * ox + a11 * oy;
  const x1 = a00 * x + a01 * y;
  const y1 = a10 * x + a11 * y;
  const d = (x1 - x0) * (x1 - x0) + (y1 - y0) * (y1 - y0);
  let sfactor_sq = 1 / d - 0.25;
  if (sfactor_sq < 0) sfactor_sq = 0;
  let sfactor = Math.sqrt(sfactor_sq);
  if (sweep == large) sfactor = -sfactor;
  const xc = 0.5 * (x0 + x1) - sfactor * (y1 - y0);
  const yc = 0.5 * (y0 + y1) + sfactor * (x1 - x0);
  const th0 = Math.atan2(y0 - yc, x0 - xc);
  const th1 = Math.atan2(y1 - yc, x1 - xc);
  let th_arc = th1 - th0;
  if (th_arc < 0 && sweep === 1) {
    th_arc += extension_Tau;
  } else if (th_arc > 0 && sweep === 0) {
    th_arc -= extension_Tau;
  }
  const segs = Math.ceil(Math.abs(th_arc / (extension_HalfPi + 0.001)));
  const result = [];
  for (let i = 0; i < segs; ++i) {
    const th2 = th0 + i * th_arc / segs;
    const th3 = th0 + (i + 1) * th_arc / segs;
    result[i] = [xc, yc, th2, th3, rx, ry, sin_th, cos_th];
  }
  return extension_segmentCache[key] = result;
}
function extension_bezier(params) {
  const key = extension_vega_scenegraph_module_join.call(params);
  if (extension_bezierCache[key]) {
    return extension_bezierCache[key];
  }
  var cx = params[0],
    cy = params[1],
    th0 = params[2],
    th1 = params[3],
    rx = params[4],
    ry = params[5],
    sin_th = params[6],
    cos_th = params[7];
  const a00 = cos_th * rx;
  const a01 = -sin_th * ry;
  const a10 = sin_th * rx;
  const a11 = cos_th * ry;
  const cos_th0 = Math.cos(th0);
  const sin_th0 = Math.sin(th0);
  const cos_th1 = Math.cos(th1);
  const sin_th1 = Math.sin(th1);
  const th_half = 0.5 * (th1 - th0);
  const sin_th_h2 = Math.sin(th_half * 0.5);
  const t = 8 / 3 * sin_th_h2 * sin_th_h2 / Math.sin(th_half);
  const x1 = cx + cos_th0 - t * sin_th0;
  const y1 = cy + sin_th0 + t * cos_th0;
  const x3 = cx + cos_th1;
  const y3 = cy + sin_th1;
  const x2 = x3 + t * sin_th1;
  const y2 = y3 - t * cos_th1;
  return extension_bezierCache[key] = [a00 * x1 + a01 * y1, a10 * x1 + a11 * y1, a00 * x2 + a01 * y2, a10 * x2 + a11 * y2, a00 * x3 + a01 * y3, a10 * x3 + a11 * y3];
}

const extension_temp = ['l', 0, 0, 0, 0, 0, 0, 0];
function extension_scale$1(current, sX, sY) {
  const c = extension_temp[0] = current[0];
  if (c === 'a' || c === 'A') {
    extension_temp[1] = sX * current[1];
    extension_temp[2] = sY * current[2];
    extension_temp[3] = current[3];
    extension_temp[4] = current[4];
    extension_temp[5] = current[5];
    extension_temp[6] = sX * current[6];
    extension_temp[7] = sY * current[7];
  } else if (c === 'h' || c === 'H') {
    extension_temp[1] = sX * current[1];
  } else if (c === 'v' || c === 'V') {
    extension_temp[1] = sY * current[1];
  } else {
    for (var i = 1, n = current.length; i < n; ++i) {
      extension_temp[i] = (i % 2 == 1 ? sX : sY) * current[i];
    }
  }
  return extension_temp;
}
function extension_pathRender (context, path, l, t, sX, sY) {
  var current,
    // current instruction
    previous = null,
    x = 0,
    // current x
    y = 0,
    // current y
    controlX = 0,
    // current control point x
    controlY = 0,
    // current control point y
    tempX,
    tempY,
    tempControlX,
    tempControlY,
    anchorX = 0,
    anchorY = 0;
  if (l == null) l = 0;
  if (t == null) t = 0;
  if (sX == null) sX = 1;
  if (sY == null) sY = sX;
  if (context.beginPath) context.beginPath();
  for (var i = 0, len = path.length; i < len; ++i) {
    current = path[i];
    if (sX !== 1 || sY !== 1) {
      current = extension_scale$1(current, sX, sY);
    }
    switch (current[0]) {
      // first letter

      case 'l':
        // lineto, relative
        x += current[1];
        y += current[2];
        context.lineTo(x + l, y + t);
        break;
      case 'L':
        // lineto, absolute
        x = current[1];
        y = current[2];
        context.lineTo(x + l, y + t);
        break;
      case 'h':
        // horizontal lineto, relative
        x += current[1];
        context.lineTo(x + l, y + t);
        break;
      case 'H':
        // horizontal lineto, absolute
        x = current[1];
        context.lineTo(x + l, y + t);
        break;
      case 'v':
        // vertical lineto, relative
        y += current[1];
        context.lineTo(x + l, y + t);
        break;
      case 'V':
        // verical lineto, absolute
        y = current[1];
        context.lineTo(x + l, y + t);
        break;
      case 'm':
        // moveTo, relative
        x += current[1];
        y += current[2];
        anchorX = x;
        anchorY = y;
        context.moveTo(x + l, y + t);
        break;
      case 'M':
        // moveTo, absolute
        x = current[1];
        y = current[2];
        anchorX = x;
        anchorY = y;
        context.moveTo(x + l, y + t);
        break;
      case 'c':
        // bezierCurveTo, relative
        tempX = x + current[5];
        tempY = y + current[6];
        controlX = x + current[3];
        controlY = y + current[4];
        context.bezierCurveTo(x + current[1] + l,
        // x1
        y + current[2] + t,
        // y1
        controlX + l,
        // x2
        controlY + t,
        // y2
        tempX + l, tempY + t);
        x = tempX;
        y = tempY;
        break;
      case 'C':
        // bezierCurveTo, absolute
        x = current[5];
        y = current[6];
        controlX = current[3];
        controlY = current[4];
        context.bezierCurveTo(current[1] + l, current[2] + t, controlX + l, controlY + t, x + l, y + t);
        break;
      case 's':
        // shorthand cubic bezierCurveTo, relative
        // transform to absolute x,y
        tempX = x + current[3];
        tempY = y + current[4];
        // calculate reflection of previous control points
        controlX = 2 * x - controlX;
        controlY = 2 * y - controlY;
        context.bezierCurveTo(controlX + l, controlY + t, x + current[1] + l, y + current[2] + t, tempX + l, tempY + t);

        // set control point to 2nd one of this command
        // the first control point is assumed to be the reflection of
        // the second control point on the previous command relative
        // to the current point.
        controlX = x + current[1];
        controlY = y + current[2];
        x = tempX;
        y = tempY;
        break;
      case 'S':
        // shorthand cubic bezierCurveTo, absolute
        tempX = current[3];
        tempY = current[4];
        // calculate reflection of previous control points
        controlX = 2 * x - controlX;
        controlY = 2 * y - controlY;
        context.bezierCurveTo(controlX + l, controlY + t, current[1] + l, current[2] + t, tempX + l, tempY + t);
        x = tempX;
        y = tempY;
        // set control point to 2nd one of this command
        // the first control point is assumed to be the reflection of
        // the second control point on the previous command relative
        // to the current point.
        controlX = current[1];
        controlY = current[2];
        break;
      case 'q':
        // quadraticCurveTo, relative
        // transform to absolute x,y
        tempX = x + current[3];
        tempY = y + current[4];
        controlX = x + current[1];
        controlY = y + current[2];
        context.quadraticCurveTo(controlX + l, controlY + t, tempX + l, tempY + t);
        x = tempX;
        y = tempY;
        break;
      case 'Q':
        // quadraticCurveTo, absolute
        tempX = current[3];
        tempY = current[4];
        context.quadraticCurveTo(current[1] + l, current[2] + t, tempX + l, tempY + t);
        x = tempX;
        y = tempY;
        controlX = current[1];
        controlY = current[2];
        break;
      case 't':
        // shorthand quadraticCurveTo, relative

        // transform to absolute x,y
        tempX = x + current[1];
        tempY = y + current[2];
        if (previous[0].match(/[QqTt]/) === null) {
          // If there is no previous command or if the previous command was not a Q, q, T or t,
          // assume the control point is coincident with the current point
          controlX = x;
          controlY = y;
        } else if (previous[0] === 't') {
          // calculate reflection of previous control points for t
          controlX = 2 * x - tempControlX;
          controlY = 2 * y - tempControlY;
        } else if (previous[0] === 'q') {
          // calculate reflection of previous control points for q
          controlX = 2 * x - controlX;
          controlY = 2 * y - controlY;
        }
        tempControlX = controlX;
        tempControlY = controlY;
        context.quadraticCurveTo(controlX + l, controlY + t, tempX + l, tempY + t);
        x = tempX;
        y = tempY;
        controlX = x + current[1];
        controlY = y + current[2];
        break;
      case 'T':
        tempX = current[1];
        tempY = current[2];

        // calculate reflection of previous control points
        controlX = 2 * x - controlX;
        controlY = 2 * y - controlY;
        context.quadraticCurveTo(controlX + l, controlY + t, tempX + l, tempY + t);
        x = tempX;
        y = tempY;
        break;
      case 'a':
        extension_drawArc(context, x + l, y + t, [current[1], current[2], current[3], current[4], current[5], current[6] + x + l, current[7] + y + t]);
        x += current[6];
        y += current[7];
        break;
      case 'A':
        extension_drawArc(context, x + l, y + t, [current[1], current[2], current[3], current[4], current[5], current[6] + l, current[7] + t]);
        x = current[6];
        y = current[7];
        break;
      case 'z':
      case 'Z':
        x = anchorX;
        y = anchorY;
        context.closePath();
        break;
    }
    previous = current;
  }
}
function extension_drawArc(context, x, y, coords) {
  const seg = extension_segments(coords[5],
  // end x
  coords[6],
  // end y
  coords[0],
  // radius x
  coords[1],
  // radius y
  coords[3],
  // large flag
  coords[4],
  // sweep flag
  coords[2],
  // rotation
  x, y);
  for (let i = 0; i < seg.length; ++i) {
    const bez = extension_bezier(seg[i]);
    context.bezierCurveTo(bez[0], bez[1], bez[2], bez[3], bez[4], bez[5]);
  }
}

const extension_Tan30 = 0.5773502691896257;
const extension_builtins = {
  'circle': {
    draw: function (context, size) {
      const r = Math.sqrt(size) / 2;
      context.moveTo(r, 0);
      context.arc(0, 0, r, 0, extension_Tau);
    }
  },
  'cross': {
    draw: function (context, size) {
      var r = Math.sqrt(size) / 2,
        s = r / 2.5;
      context.moveTo(-r, -s);
      context.lineTo(-r, s);
      context.lineTo(-s, s);
      context.lineTo(-s, r);
      context.lineTo(s, r);
      context.lineTo(s, s);
      context.lineTo(r, s);
      context.lineTo(r, -s);
      context.lineTo(s, -s);
      context.lineTo(s, -r);
      context.lineTo(-s, -r);
      context.lineTo(-s, -s);
      context.closePath();
    }
  },
  'diamond': {
    draw: function (context, size) {
      const r = Math.sqrt(size) / 2;
      context.moveTo(-r, 0);
      context.lineTo(0, -r);
      context.lineTo(r, 0);
      context.lineTo(0, r);
      context.closePath();
    }
  },
  'square': {
    draw: function (context, size) {
      var w = Math.sqrt(size),
        x = -w / 2;
      context.rect(x, x, w, w);
    }
  },
  'arrow': {
    draw: function (context, size) {
      var r = Math.sqrt(size) / 2,
        s = r / 7,
        t = r / 2.5,
        v = r / 8;
      context.moveTo(-s, r);
      context.lineTo(s, r);
      context.lineTo(s, -v);
      context.lineTo(t, -v);
      context.lineTo(0, -r);
      context.lineTo(-t, -v);
      context.lineTo(-s, -v);
      context.closePath();
    }
  },
  'wedge': {
    draw: function (context, size) {
      var r = Math.sqrt(size) / 2,
        h = extension_HalfSqrt3 * r,
        o = h - r * extension_Tan30,
        b = r / 4;
      context.moveTo(0, -h - o);
      context.lineTo(-b, h - o);
      context.lineTo(b, h - o);
      context.closePath();
    }
  },
  'triangle': {
    draw: function (context, size) {
      var r = Math.sqrt(size) / 2,
        h = extension_HalfSqrt3 * r,
        o = h - r * extension_Tan30;
      context.moveTo(0, -h - o);
      context.lineTo(-r, h - o);
      context.lineTo(r, h - o);
      context.closePath();
    }
  },
  'triangle-up': {
    draw: function (context, size) {
      var r = Math.sqrt(size) / 2,
        h = extension_HalfSqrt3 * r;
      context.moveTo(0, -h);
      context.lineTo(-r, h);
      context.lineTo(r, h);
      context.closePath();
    }
  },
  'triangle-down': {
    draw: function (context, size) {
      var r = Math.sqrt(size) / 2,
        h = extension_HalfSqrt3 * r;
      context.moveTo(0, h);
      context.lineTo(-r, -h);
      context.lineTo(r, -h);
      context.closePath();
    }
  },
  'triangle-right': {
    draw: function (context, size) {
      var r = Math.sqrt(size) / 2,
        h = extension_HalfSqrt3 * r;
      context.moveTo(h, 0);
      context.lineTo(-h, -r);
      context.lineTo(-h, r);
      context.closePath();
    }
  },
  'triangle-left': {
    draw: function (context, size) {
      var r = Math.sqrt(size) / 2,
        h = extension_HalfSqrt3 * r;
      context.moveTo(-h, 0);
      context.lineTo(h, -r);
      context.lineTo(h, r);
      context.closePath();
    }
  },
  'stroke': {
    draw: function (context, size) {
      const r = Math.sqrt(size) / 2;
      context.moveTo(-r, 0);
      context.lineTo(r, 0);
    }
  }
};
function extension_vega_scenegraph_module_symbols(_) {
  return extension_vega_util_module_has(extension_builtins, _) ? extension_builtins[_] : extension_customSymbol(_);
}
var extension_vega_scenegraph_module_custom = {};
function extension_customSymbol(path) {
  if (!extension_vega_util_module_has(extension_vega_scenegraph_module_custom, path)) {
    const parsed = extension_vega_scenegraph_module_parse(path);
    extension_vega_scenegraph_module_custom[path] = {
      draw: function (context, size) {
        extension_pathRender(context, parsed, 0, 0, Math.sqrt(size) / 2);
      }
    };
  }
  return extension_vega_scenegraph_module_custom[path];
}

// See http://spencermortensen.com/articles/bezier-circle/
const extension_vega_scenegraph_module_C = 0.448084975506; // C = 1 - c

function extension_rectangleX(d) {
  return d.x;
}
function extension_rectangleY(d) {
  return d.y;
}
function extension_rectangleWidth(d) {
  return d.width;
}
function extension_rectangleHeight(d) {
  return d.height;
}
function extension_vega_scenegraph_module_number(_) {
  return typeof _ === 'function' ? _ : () => +_;
}
function extension_clamp(value, min, max) {
  return Math.max(min, Math.min(value, max));
}
function extension_vg_rect () {
  var x = extension_rectangleX,
    y = extension_rectangleY,
    width = extension_rectangleWidth,
    height = extension_rectangleHeight,
    crTL = extension_vega_scenegraph_module_number(0),
    crTR = crTL,
    crBL = crTL,
    crBR = crTL,
    context = null;
  function rectangle(_, x0, y0) {
    var buffer,
      x1 = x0 != null ? x0 : +x.call(this, _),
      y1 = y0 != null ? y0 : +y.call(this, _),
      w = +width.call(this, _),
      h = +height.call(this, _),
      s = Math.min(w, h) / 2,
      tl = extension_clamp(+crTL.call(this, _), 0, s),
      tr = extension_clamp(+crTR.call(this, _), 0, s),
      bl = extension_clamp(+crBL.call(this, _), 0, s),
      br = extension_clamp(+crBR.call(this, _), 0, s);
    if (!context) context = buffer = extension_path();
    if (tl <= 0 && tr <= 0 && bl <= 0 && br <= 0) {
      context.rect(x1, y1, w, h);
    } else {
      var x2 = x1 + w,
        y2 = y1 + h;
      context.moveTo(x1 + tl, y1);
      context.lineTo(x2 - tr, y1);
      context.bezierCurveTo(x2 - extension_vega_scenegraph_module_C * tr, y1, x2, y1 + extension_vega_scenegraph_module_C * tr, x2, y1 + tr);
      context.lineTo(x2, y2 - br);
      context.bezierCurveTo(x2, y2 - extension_vega_scenegraph_module_C * br, x2 - extension_vega_scenegraph_module_C * br, y2, x2 - br, y2);
      context.lineTo(x1 + bl, y2);
      context.bezierCurveTo(x1 + extension_vega_scenegraph_module_C * bl, y2, x1, y2 - extension_vega_scenegraph_module_C * bl, x1, y2 - bl);
      context.lineTo(x1, y1 + tl);
      context.bezierCurveTo(x1, y1 + extension_vega_scenegraph_module_C * tl, x1 + extension_vega_scenegraph_module_C * tl, y1, x1 + tl, y1);
      context.closePath();
    }
    if (buffer) {
      context = null;
      return buffer + '' || null;
    }
  }
  rectangle.x = function (_) {
    if (arguments.length) {
      x = extension_vega_scenegraph_module_number(_);
      return rectangle;
    } else {
      return x;
    }
  };
  rectangle.y = function (_) {
    if (arguments.length) {
      y = extension_vega_scenegraph_module_number(_);
      return rectangle;
    } else {
      return y;
    }
  };
  rectangle.width = function (_) {
    if (arguments.length) {
      width = extension_vega_scenegraph_module_number(_);
      return rectangle;
    } else {
      return width;
    }
  };
  rectangle.height = function (_) {
    if (arguments.length) {
      height = extension_vega_scenegraph_module_number(_);
      return rectangle;
    } else {
      return height;
    }
  };
  rectangle.cornerRadius = function (tl, tr, br, bl) {
    if (arguments.length) {
      crTL = extension_vega_scenegraph_module_number(tl);
      crTR = tr != null ? extension_vega_scenegraph_module_number(tr) : crTL;
      crBR = br != null ? extension_vega_scenegraph_module_number(br) : crTL;
      crBL = bl != null ? extension_vega_scenegraph_module_number(bl) : crTR;
      return rectangle;
    } else {
      return crTL;
    }
  };
  rectangle.context = function (_) {
    if (arguments.length) {
      context = _ == null ? null : _;
      return rectangle;
    } else {
      return context;
    }
  };
  return rectangle;
}

function extension_vg_trail () {
  var x,
    y,
    size,
    defined,
    context = null,
    ready,
    x1,
    y1,
    r1;
  function point(x2, y2, w2) {
    const r2 = w2 / 2;
    if (ready) {
      var ux = y1 - y2,
        uy = x2 - x1;
      if (ux || uy) {
        // get normal vector
        var ud = Math.hypot(ux, uy),
          rx = (ux /= ud) * r1,
          ry = (uy /= ud) * r1,
          t = Math.atan2(uy, ux);

        // draw segment
        context.moveTo(x1 - rx, y1 - ry);
        context.lineTo(x2 - ux * r2, y2 - uy * r2);
        context.arc(x2, y2, r2, t - Math.PI, t);
        context.lineTo(x1 + rx, y1 + ry);
        context.arc(x1, y1, r1, t, t + Math.PI);
      } else {
        context.arc(x2, y2, r2, 0, extension_Tau);
      }
      context.closePath();
    } else {
      ready = 1;
    }
    x1 = x2;
    y1 = y2;
    r1 = r2;
  }
  function trail(data) {
    var i,
      n = data.length,
      d,
      defined0 = false,
      buffer;
    if (context == null) context = buffer = extension_path();
    for (i = 0; i <= n; ++i) {
      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
        if (defined0 = !defined0) ready = 0;
      }
      if (defined0) point(+x(d, i, data), +y(d, i, data), +size(d, i, data));
    }
    if (buffer) {
      context = null;
      return buffer + '' || null;
    }
  }
  trail.x = function (_) {
    if (arguments.length) {
      x = _;
      return trail;
    } else {
      return x;
    }
  };
  trail.y = function (_) {
    if (arguments.length) {
      y = _;
      return trail;
    } else {
      return y;
    }
  };
  trail.size = function (_) {
    if (arguments.length) {
      size = _;
      return trail;
    } else {
      return size;
    }
  };
  trail.defined = function (_) {
    if (arguments.length) {
      defined = _;
      return trail;
    } else {
      return defined;
    }
  };
  trail.context = function (_) {
    if (arguments.length) {
      if (_ == null) {
        context = null;
      } else {
        context = _;
      }
      return trail;
    } else {
      return context;
    }
  };
  return trail;
}

function extension_value$1(a, b) {
  return a != null ? a : b;
}
const extension_x = item => item.x || 0,
  extension_y = item => item.y || 0,
  extension_w = item => item.width || 0,
  extension_h = item => item.height || 0,
  extension_xw = item => (item.x || 0) + (item.width || 0),
  extension_yh = item => (item.y || 0) + (item.height || 0),
  extension_sa = item => item.startAngle || 0,
  extension_ea = item => item.endAngle || 0,
  extension_pa = item => item.padAngle || 0,
  extension_ir = item => item.innerRadius || 0,
  extension_vega_scenegraph_module_or = item => item.outerRadius || 0,
  extension_cr = item => item.cornerRadius || 0,
  extension_tl = item => extension_value$1(item.cornerRadiusTopLeft, item.cornerRadius) || 0,
  extension_tr = item => extension_value$1(item.cornerRadiusTopRight, item.cornerRadius) || 0,
  extension_br = item => extension_value$1(item.cornerRadiusBottomRight, item.cornerRadius) || 0,
  extension_bl = item => extension_value$1(item.cornerRadiusBottomLeft, item.cornerRadius) || 0,
  extension_sz = item => extension_value$1(item.size, 64),
  extension_ts = item => item.size || 1,
  extension_def = item => !(item.defined === false),
  extension_type = item => extension_vega_scenegraph_module_symbols(item.shape || 'circle');
const extension_arcShape = extension_arc().startAngle(extension_sa).endAngle(extension_ea).padAngle(extension_pa).innerRadius(extension_ir).outerRadius(extension_vega_scenegraph_module_or).cornerRadius(extension_cr),
  extension_areavShape = extension_src_area().x(extension_x).y1(extension_y).y0(extension_yh).defined(extension_def),
  extension_areahShape = extension_src_area().y(extension_y).x1(extension_x).x0(extension_xw).defined(extension_def),
  extension_lineShape = extension_line().x(extension_x).y(extension_y).defined(extension_def),
  extension_rectShape = extension_vg_rect().x(extension_x).y(extension_y).width(extension_w).height(extension_h).cornerRadius(extension_tl, extension_tr, extension_br, extension_bl),
  extension_symbolShape = extension_symbol_Symbol().type(extension_type).size(extension_sz),
  extension_trailShape = extension_vg_trail().x(extension_x).y(extension_y).defined(extension_def).size(extension_ts);
function extension_hasCornerRadius(item) {
  return item.cornerRadius || item.cornerRadiusTopLeft || item.cornerRadiusTopRight || item.cornerRadiusBottomRight || item.cornerRadiusBottomLeft;
}
function extension_arc$1(context, item) {
  return extension_arcShape.context(context)(item);
}
function extension_area$1(context, items) {
  const item = items[0],
    interp = item.interpolate || 'linear';
  return (item.orient === 'horizontal' ? extension_areahShape : extension_areavShape).curve(extension_curves(interp, item.orient, item.tension)).context(context)(items);
}
function extension_line$1(context, items) {
  const item = items[0],
    interp = item.interpolate || 'linear';
  return extension_lineShape.curve(extension_curves(interp, item.orient, item.tension)).context(context)(items);
}
function extension_rectangle(context, item, x, y) {
  return extension_rectShape.context(context)(item, x, y);
}
function extension_shape$1(context, item) {
  return (item.mark.shape || item.shape).context(context)(item);
}
function extension_symbol$1(context, item) {
  return extension_symbolShape.context(context)(item);
}
function extension_trail$1(context, items) {
  return extension_trailShape.context(context)(items);
}

var extension_clip_id = 1;
function extension_resetSVGClipId() {
  extension_clip_id = 1;
}
function extension_clip$1 (renderer, item, size) {
  var clip = item.clip,
    defs = renderer._defs,
    id = item.clip_id || (item.clip_id = 'clip' + extension_clip_id++),
    c = defs.clipping[id] || (defs.clipping[id] = {
      id: id
    });
  if (extension_vega_util_module_isFunction(clip)) {
    c.path = clip(null);
  } else if (extension_hasCornerRadius(size)) {
    c.path = extension_rectangle(null, size, 0, 0);
  } else {
    c.width = size.width || 0;
    c.height = size.height || 0;
  }
  return 'url(#' + id + ')';
}

function extension_Bounds(b) {
  this.clear();
  if (b) this.union(b);
}
extension_Bounds.prototype = {
  clone() {
    return new extension_Bounds(this);
  },
  clear() {
    this.x1 = +Number.MAX_VALUE;
    this.y1 = +Number.MAX_VALUE;
    this.x2 = -Number.MAX_VALUE;
    this.y2 = -Number.MAX_VALUE;
    return this;
  },
  empty() {
    return this.x1 === +Number.MAX_VALUE && this.y1 === +Number.MAX_VALUE && this.x2 === -Number.MAX_VALUE && this.y2 === -Number.MAX_VALUE;
  },
  equals(b) {
    return this.x1 === b.x1 && this.y1 === b.y1 && this.x2 === b.x2 && this.y2 === b.y2;
  },
  set(x1, y1, x2, y2) {
    if (x2 < x1) {
      this.x2 = x1;
      this.x1 = x2;
    } else {
      this.x1 = x1;
      this.x2 = x2;
    }
    if (y2 < y1) {
      this.y2 = y1;
      this.y1 = y2;
    } else {
      this.y1 = y1;
      this.y2 = y2;
    }
    return this;
  },
  add(x, y) {
    if (x < this.x1) this.x1 = x;
    if (y < this.y1) this.y1 = y;
    if (x > this.x2) this.x2 = x;
    if (y > this.y2) this.y2 = y;
    return this;
  },
  expand(d) {
    this.x1 -= d;
    this.y1 -= d;
    this.x2 += d;
    this.y2 += d;
    return this;
  },
  round() {
    this.x1 = Math.floor(this.x1);
    this.y1 = Math.floor(this.y1);
    this.x2 = Math.ceil(this.x2);
    this.y2 = Math.ceil(this.y2);
    return this;
  },
  scale(s) {
    this.x1 *= s;
    this.y1 *= s;
    this.x2 *= s;
    this.y2 *= s;
    return this;
  },
  translate(dx, dy) {
    this.x1 += dx;
    this.x2 += dx;
    this.y1 += dy;
    this.y2 += dy;
    return this;
  },
  rotate(angle, x, y) {
    const p = this.rotatedPoints(angle, x, y);
    return this.clear().add(p[0], p[1]).add(p[2], p[3]).add(p[4], p[5]).add(p[6], p[7]);
  },
  rotatedPoints(angle, x, y) {
    var {
        x1,
        y1,
        x2,
        y2
      } = this,
      cos = Math.cos(angle),
      sin = Math.sin(angle),
      cx = x - x * cos + y * sin,
      cy = y - x * sin - y * cos;
    return [cos * x1 - sin * y1 + cx, sin * x1 + cos * y1 + cy, cos * x1 - sin * y2 + cx, sin * x1 + cos * y2 + cy, cos * x2 - sin * y1 + cx, sin * x2 + cos * y1 + cy, cos * x2 - sin * y2 + cx, sin * x2 + cos * y2 + cy];
  },
  union(b) {
    if (b.x1 < this.x1) this.x1 = b.x1;
    if (b.y1 < this.y1) this.y1 = b.y1;
    if (b.x2 > this.x2) this.x2 = b.x2;
    if (b.y2 > this.y2) this.y2 = b.y2;
    return this;
  },
  intersect(b) {
    if (b.x1 > this.x1) this.x1 = b.x1;
    if (b.y1 > this.y1) this.y1 = b.y1;
    if (b.x2 < this.x2) this.x2 = b.x2;
    if (b.y2 < this.y2) this.y2 = b.y2;
    return this;
  },
  encloses(b) {
    return b && this.x1 <= b.x1 && this.x2 >= b.x2 && this.y1 <= b.y1 && this.y2 >= b.y2;
  },
  alignsWith(b) {
    return b && (this.x1 == b.x1 || this.x2 == b.x2 || this.y1 == b.y1 || this.y2 == b.y2);
  },
  intersects(b) {
    return b && !(this.x2 < b.x1 || this.x1 > b.x2 || this.y2 < b.y1 || this.y1 > b.y2);
  },
  contains(x, y) {
    return !(x < this.x1 || x > this.x2 || y < this.y1 || y > this.y2);
  },
  width() {
    return this.x2 - this.x1;
  },
  height() {
    return this.y2 - this.y1;
  }
};

function extension_Item(mark) {
  this.mark = mark;
  this.bounds = this.bounds || new extension_Bounds();
}

function extension_GroupItem(mark) {
  extension_Item.call(this, mark);
  this.items = this.items || [];
}
extension_inherits(extension_GroupItem, extension_Item);

class extension_ResourceLoader {
  constructor(customLoader) {
    this._pending = 0;
    this._loader = customLoader || extension_loader();
  }
  pending() {
    return this._pending;
  }
  sanitizeURL(uri) {
    const loader = this;
    extension_increment(loader);
    return loader._loader.sanitize(uri, {
      context: 'href'
    }).then(opt => {
      extension_decrement(loader);
      return opt;
    }).catch(() => {
      extension_decrement(loader);
      return null;
    });
  }
  loadImage(uri) {
    const loader = this,
      Image = extension_domImage();
    extension_increment(loader);
    return loader._loader.sanitize(uri, {
      context: 'image'
    }).then(opt => {
      const url = opt.href;
      if (!url || !Image) throw {
        url: url
      };
      const img = new Image();

      // set crossOrigin only if cors is defined; empty string sets anonymous mode
      // https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/crossOrigin
      const cors = extension_vega_util_module_has(opt, 'crossOrigin') ? opt.crossOrigin : 'anonymous';
      if (cors != null) img.crossOrigin = cors;

      // attempt to load image resource
      img.onload = () => extension_decrement(loader);
      img.onerror = () => extension_decrement(loader);
      img.src = url;
      return img;
    }).catch(e => {
      extension_decrement(loader);
      return {
        complete: false,
        width: 0,
        height: 0,
        src: e && e.url || ''
      };
    });
  }
  ready() {
    const loader = this;
    return new Promise(accept => {
      function poll(value) {
        if (!loader.pending()) accept(value);else setTimeout(() => {
          poll(true);
        }, 10);
      }
      poll(false);
    });
  }
}
function extension_increment(loader) {
  loader._pending += 1;
}
function extension_decrement(loader) {
  loader._pending -= 1;
}

function extension_boundStroke (bounds, item, miter) {
  if (item.stroke && item.opacity !== 0 && item.strokeOpacity !== 0) {
    const sw = item.strokeWidth != null ? +item.strokeWidth : 1;
    bounds.expand(sw + (miter ? extension_miterAdjustment(item, sw) : 0));
  }
  return bounds;
}
function extension_miterAdjustment(item, strokeWidth) {
  // TODO: more sophisticated adjustment? Or miter support in boundContext?
  return item.strokeJoin && item.strokeJoin !== 'miter' ? 0 : strokeWidth;
}

const extension_circleThreshold = extension_Tau - 1e-8;
let extension_bounds, extension_lx, extension_ly, extension_rot, extension_ma, extension_mb, extension_mc, extension_md;
const extension_vega_scenegraph_module_add = (x, y) => extension_bounds.add(x, y);
const extension_addL = (x, y) => extension_vega_scenegraph_module_add(extension_lx = x, extension_ly = y);
const extension_addX = x => extension_vega_scenegraph_module_add(x, extension_bounds.y1);
const extension_addY = y => extension_vega_scenegraph_module_add(extension_bounds.x1, y);
const extension_px = (x, y) => extension_ma * x + extension_mc * y;
const extension_py = (x, y) => extension_mb * x + extension_md * y;
const extension_addp = (x, y) => extension_vega_scenegraph_module_add(extension_px(x, y), extension_py(x, y));
const extension_addpL = (x, y) => extension_addL(extension_px(x, y), extension_py(x, y));
function extension_boundContext (_, deg) {
  extension_bounds = _;
  if (deg) {
    extension_rot = deg * extension_DegToRad;
    extension_ma = extension_md = Math.cos(extension_rot);
    extension_mb = Math.sin(extension_rot);
    extension_mc = -extension_mb;
  } else {
    extension_ma = extension_md = 1;
    extension_rot = extension_mb = extension_mc = 0;
  }
  return extension_context$1;
}
const extension_context$1 = {
  beginPath() {},
  closePath() {},
  moveTo: extension_addpL,
  lineTo: extension_addpL,
  rect(x, y, w, h) {
    if (extension_rot) {
      extension_addp(x + w, y);
      extension_addp(x + w, y + h);
      extension_addp(x, y + h);
      extension_addpL(x, y);
    } else {
      extension_vega_scenegraph_module_add(x + w, y + h);
      extension_addL(x, y);
    }
  },
  quadraticCurveTo(x1, y1, x2, y2) {
    const px1 = extension_px(x1, y1),
      py1 = extension_py(x1, y1),
      px2 = extension_px(x2, y2),
      py2 = extension_py(x2, y2);
    extension_quadExtrema(extension_lx, px1, px2, extension_addX);
    extension_quadExtrema(extension_ly, py1, py2, extension_addY);
    extension_addL(px2, py2);
  },
  bezierCurveTo(x1, y1, x2, y2, x3, y3) {
    const px1 = extension_px(x1, y1),
      py1 = extension_py(x1, y1),
      px2 = extension_px(x2, y2),
      py2 = extension_py(x2, y2),
      px3 = extension_px(x3, y3),
      py3 = extension_py(x3, y3);
    extension_cubicExtrema(extension_lx, px1, px2, px3, extension_addX);
    extension_cubicExtrema(extension_ly, py1, py2, py3, extension_addY);
    extension_addL(px3, py3);
  },
  arc(cx, cy, r, sa, ea, ccw) {
    sa += extension_rot;
    ea += extension_rot;

    // store last point on path
    extension_lx = r * Math.cos(ea) + cx;
    extension_ly = r * Math.sin(ea) + cy;
    if (Math.abs(ea - sa) > extension_circleThreshold) {
      // treat as full circle
      extension_vega_scenegraph_module_add(cx - r, cy - r);
      extension_vega_scenegraph_module_add(cx + r, cy + r);
    } else {
      const update = a => extension_vega_scenegraph_module_add(r * Math.cos(a) + cx, r * Math.sin(a) + cy);
      let s, i;

      // sample end points
      update(sa);
      update(ea);

      // sample interior points aligned with 90 degrees
      if (ea !== sa) {
        sa = sa % extension_Tau;
        if (sa < 0) sa += extension_Tau;
        ea = ea % extension_Tau;
        if (ea < 0) ea += extension_Tau;
        if (ea < sa) {
          ccw = !ccw; // flip direction
          s = sa;
          sa = ea;
          ea = s; // swap end-points
        }
        if (ccw) {
          ea -= extension_Tau;
          s = sa - sa % extension_HalfPi;
          for (i = 0; i < 4 && s > ea; ++i, s -= extension_HalfPi) update(s);
        } else {
          s = sa - sa % extension_HalfPi + extension_HalfPi;
          for (i = 0; i < 4 && s < ea; ++i, s = s + extension_HalfPi) update(s);
        }
      }
    }
  }
};
function extension_quadExtrema(x0, x1, x2, cb) {
  const t = (x0 - x1) / (x0 + x2 - 2 * x1);
  if (0 < t && t < 1) cb(x0 + (x1 - x0) * t);
}
function extension_cubicExtrema(x0, x1, x2, x3, cb) {
  const a = x3 - x0 + 3 * x1 - 3 * x2,
    b = x0 + x2 - 2 * x1,
    c = x0 - x1;
  let t0 = 0,
    t1 = 0,
    r;

  // solve for parameter t
  if (Math.abs(a) > extension_Epsilon) {
    // quadratic equation
    r = b * b + c * a;
    if (r >= 0) {
      r = Math.sqrt(r);
      t0 = (-b + r) / a;
      t1 = (-b - r) / a;
    }
  } else {
    // linear equation
    t0 = 0.5 * c / b;
  }

  // calculate position
  if (0 < t0 && t0 < 1) cb(extension_cubic(t0, x0, x1, x2, x3));
  if (0 < t1 && t1 < 1) cb(extension_cubic(t1, x0, x1, x2, x3));
}
function extension_cubic(t, x0, x1, x2, x3) {
  const s = 1 - t,
    s2 = s * s,
    t2 = t * t;
  return s2 * s * x0 + 3 * s2 * t * x1 + 3 * s * t2 * x2 + t2 * t * x3;
}

var extension_context = (extension_context = extension_domCanvas(1, 1)) ? extension_context.getContext('2d') : null;

const extension_b = new extension_Bounds();
function extension_intersectPath(draw) {
  return function (item, brush) {
    // rely on (inaccurate) bounds intersection if no context
    if (!extension_context) return true;

    // add path to offscreen graphics context
    draw(extension_context, item);

    // get bounds intersection region
    extension_b.clear().union(item.bounds).intersect(brush).round();
    const {
      x1,
      y1,
      x2,
      y2
    } = extension_b;

    // iterate over intersection region
    // perform fine grained inclusion test
    for (let y = y1; y <= y2; ++y) {
      for (let x = x1; x <= x2; ++x) {
        if (extension_context.isPointInPath(x, y)) {
          return true;
        }
      }
    }

    // false if no hits in intersection region
    return false;
  };
}
function extension_intersectPoint(item, box) {
  return box.contains(item.x || 0, item.y || 0);
}
function extension_intersectRect(item, box) {
  const x = item.x || 0,
    y = item.y || 0,
    w = item.width || 0,
    h = item.height || 0;
  return box.intersects(extension_b.set(x, y, x + w, y + h));
}
function extension_intersectRule(item, box) {
  const x = item.x || 0,
    y = item.y || 0,
    x2 = item.x2 != null ? item.x2 : x,
    y2 = item.y2 != null ? item.y2 : y;
  return extension_intersectBoxLine(box, x, y, x2, y2);
}
function extension_intersectBoxLine(box, x, y, u, v) {
  const {
      x1,
      y1,
      x2,
      y2
    } = box,
    dx = u - x,
    dy = v - y;
  let t0 = 0,
    t1 = 1,
    p,
    q,
    r,
    e;
  for (e = 0; e < 4; ++e) {
    if (e === 0) {
      p = -dx;
      q = -(x1 - x);
    }
    if (e === 1) {
      p = dx;
      q = x2 - x;
    }
    if (e === 2) {
      p = -dy;
      q = -(y1 - y);
    }
    if (e === 3) {
      p = dy;
      q = y2 - y;
    }
    if (Math.abs(p) < 1e-10 && q < 0) return false;
    r = q / p;
    if (p < 0) {
      if (r > t1) return false;else if (r > t0) t0 = r;
    } else if (p > 0) {
      if (r < t0) return false;else if (r < t1) t1 = r;
    }
  }
  return true;
}

function extension_blend (context, item) {
  context.globalCompositeOperation = item.blend || 'source-over';
}

function extension_vega_scenegraph_module_value (value, dflt) {
  return value == null ? dflt : value;
}

function extension_addStops(gradient, stops) {
  const n = stops.length;
  for (let i = 0; i < n; ++i) {
    gradient.addColorStop(stops[i].offset, stops[i].color);
  }
  return gradient;
}
function extension_gradient (context, spec, bounds) {
  const w = bounds.width(),
    h = bounds.height();
  let gradient;
  if (spec.gradient === 'radial') {
    gradient = context.createRadialGradient(bounds.x1 + extension_vega_scenegraph_module_value(spec.x1, 0.5) * w, bounds.y1 + extension_vega_scenegraph_module_value(spec.y1, 0.5) * h, Math.max(w, h) * extension_vega_scenegraph_module_value(spec.r1, 0), bounds.x1 + extension_vega_scenegraph_module_value(spec.x2, 0.5) * w, bounds.y1 + extension_vega_scenegraph_module_value(spec.y2, 0.5) * h, Math.max(w, h) * extension_vega_scenegraph_module_value(spec.r2, 0.5));
  } else {
    // linear gradient
    const x1 = extension_vega_scenegraph_module_value(spec.x1, 0),
      y1 = extension_vega_scenegraph_module_value(spec.y1, 0),
      x2 = extension_vega_scenegraph_module_value(spec.x2, 1),
      y2 = extension_vega_scenegraph_module_value(spec.y2, 0);
    if (x1 === x2 || y1 === y2 || w === h) {
      // axis aligned: use normal gradient
      gradient = context.createLinearGradient(bounds.x1 + x1 * w, bounds.y1 + y1 * h, bounds.x1 + x2 * w, bounds.y1 + y2 * h);
    } else {
      // not axis aligned: render gradient into a pattern (#2365)
      // this allows us to use normalized bounding box coordinates
      const image = extension_domCanvas(Math.ceil(w), Math.ceil(h)),
        ictx = image.getContext('2d');
      ictx.scale(w, h);
      ictx.fillStyle = extension_addStops(ictx.createLinearGradient(x1, y1, x2, y2), spec.stops);
      ictx.fillRect(0, 0, w, h);
      return context.createPattern(image, 'no-repeat');
    }
  }
  return extension_addStops(gradient, spec.stops);
}

function extension_vega_scenegraph_module_color (context, item, value) {
  return extension_isGradient(value) ? extension_gradient(context, value, item.bounds) : value;
}

function extension_fill (context, item, opacity) {
  opacity *= item.fillOpacity == null ? 1 : item.fillOpacity;
  if (opacity > 0) {
    context.globalAlpha = opacity;
    context.fillStyle = extension_vega_scenegraph_module_color(context, item, item.fill);
    return true;
  } else {
    return false;
  }
}

var extension_vega_scenegraph_module_Empty = [];
function extension_stroke (context, item, opacity) {
  var lw = (lw = item.strokeWidth) != null ? lw : 1;
  if (lw <= 0) return false;
  opacity *= item.strokeOpacity == null ? 1 : item.strokeOpacity;
  if (opacity > 0) {
    context.globalAlpha = opacity;
    context.strokeStyle = extension_vega_scenegraph_module_color(context, item, item.stroke);
    context.lineWidth = lw;
    context.lineCap = item.strokeCap || 'butt';
    context.lineJoin = item.strokeJoin || 'miter';
    context.miterLimit = item.strokeMiterLimit || 10;
    if (context.setLineDash) {
      context.setLineDash(item.strokeDash || extension_vega_scenegraph_module_Empty);
      context.lineDashOffset = item.strokeDashOffset || 0;
    }
    return true;
  } else {
    return false;
  }
}

function extension_vega_scenegraph_module_compare(a, b) {
  return a.zindex - b.zindex || a.index - b.index;
}
function extension_zorder(scene) {
  if (!scene.zdirty) return scene.zitems;
  var items = scene.items,
    output = [],
    item,
    i,
    n;
  for (i = 0, n = items.length; i < n; ++i) {
    item = items[i];
    item.index = i;
    if (item.zindex) output.push(item);
  }
  scene.zdirty = false;
  return scene.zitems = output.sort(extension_vega_scenegraph_module_compare);
}
function extension_vega_scenegraph_module_visit(scene, visitor) {
  var items = scene.items,
    i,
    n;
  if (!items || !items.length) return;
  const zitems = extension_zorder(scene);
  if (zitems && zitems.length) {
    for (i = 0, n = items.length; i < n; ++i) {
      if (!items[i].zindex) visitor(items[i]);
    }
    items = zitems;
  }
  for (i = 0, n = items.length; i < n; ++i) {
    visitor(items[i]);
  }
}
function extension_pickVisit(scene, visitor) {
  var items = scene.items,
    hit,
    i;
  if (!items || !items.length) return null;
  const zitems = extension_zorder(scene);
  if (zitems && zitems.length) items = zitems;
  for (i = items.length; --i >= 0;) {
    if (hit = visitor(items[i])) return hit;
  }
  if (items === zitems) {
    for (items = scene.items, i = items.length; --i >= 0;) {
      if (!items[i].zindex) {
        if (hit = visitor(items[i])) return hit;
      }
    }
  }
  return null;
}

function extension_drawAll(path) {
  return function (context, scene, bounds) {
    extension_vega_scenegraph_module_visit(scene, item => {
      if (!bounds || bounds.intersects(item.bounds)) {
        extension_drawPath(path, context, item, item);
      }
    });
  };
}
function extension_drawOne(path) {
  return function (context, scene, bounds) {
    if (scene.items.length && (!bounds || bounds.intersects(scene.bounds))) {
      extension_drawPath(path, context, scene.items[0], scene.items);
    }
  };
}
function extension_drawPath(path, context, item, items) {
  var opacity = item.opacity == null ? 1 : item.opacity;
  if (opacity === 0) return;
  if (path(context, items)) return;
  extension_blend(context, item);
  if (item.fill && extension_fill(context, item, opacity)) {
    context.fill();
  }
  if (item.stroke && extension_stroke(context, item, opacity)) {
    context.stroke();
  }
}

function extension_pick$1(test) {
  test = test || extension_truthy;
  return function (context, scene, x, y, gx, gy) {
    x *= context.pixelRatio;
    y *= context.pixelRatio;
    return extension_pickVisit(scene, item => {
      const b = item.bounds;
      // first hit test against bounding box
      if (b && !b.contains(gx, gy) || !b) return;
      // if in bounding box, perform more careful test
      if (test(context, item, x, y, gx, gy)) return item;
    });
  };
}
function extension_hitPath(path, filled) {
  return function (context, o, x, y) {
    var item = Array.isArray(o) ? o[0] : o,
      fill = filled == null ? item.fill : filled,
      stroke = item.stroke && context.isPointInStroke,
      lw,
      lc;
    if (stroke) {
      lw = item.strokeWidth;
      lc = item.strokeCap;
      context.lineWidth = lw != null ? lw : 1;
      context.lineCap = lc != null ? lc : 'butt';
    }
    return path(context, o) ? false : fill && context.isPointInPath(x, y) || stroke && context.isPointInStroke(x, y);
  };
}
function extension_pickPath(path) {
  return extension_pick$1(extension_hitPath(path));
}

function extension_translate(x, y) {
  return 'translate(' + x + ',' + y + ')';
}
function extension_rotate(a) {
  return 'rotate(' + a + ')';
}
function extension_vega_scenegraph_module_scale(scaleX, scaleY) {
  return 'scale(' + scaleX + ',' + scaleY + ')';
}
function extension_translateItem(item) {
  return extension_translate(item.x || 0, item.y || 0);
}
function extension_rotateItem(item) {
  return extension_translate(item.x || 0, item.y || 0) + (item.angle ? ' ' + extension_rotate(item.angle) : '');
}
function extension_transformItem(item) {
  return extension_translate(item.x || 0, item.y || 0) + (item.angle ? ' ' + extension_rotate(item.angle) : '') + (item.scaleX || item.scaleY ? ' ' + extension_vega_scenegraph_module_scale(item.scaleX || 1, item.scaleY || 1) : '');
}

function extension_markItemPath (type, shape, isect) {
  function attr(emit, item) {
    emit('transform', extension_rotateItem(item));
    emit('d', shape(null, item));
  }
  function bound(bounds, item) {
    shape(extension_boundContext(bounds, item.angle), item);
    return extension_boundStroke(bounds, item).translate(item.x || 0, item.y || 0);
  }
  function draw(context, item) {
    var x = item.x || 0,
      y = item.y || 0,
      a = item.angle || 0;
    context.translate(x, y);
    if (a) context.rotate(a *= extension_DegToRad);
    context.beginPath();
    shape(context, item);
    if (a) context.rotate(-a);
    context.translate(-x, -y);
  }
  return {
    type: type,
    tag: 'path',
    nested: false,
    attr: attr,
    bound: bound,
    draw: extension_drawAll(draw),
    pick: extension_pickPath(draw),
    isect: isect || extension_intersectPath(draw)
  };
}

var extension_vega_scenegraph_module_arc = extension_markItemPath('arc', extension_arc$1);

function extension_pickArea(a, p) {
  var v = a[0].orient === 'horizontal' ? p[1] : p[0],
    z = a[0].orient === 'horizontal' ? 'y' : 'x',
    i = a.length,
    min = +Infinity,
    hit,
    d;
  while (--i >= 0) {
    if (a[i].defined === false) continue;
    d = Math.abs(a[i][z] - v);
    if (d < min) {
      min = d;
      hit = a[i];
    }
  }
  return hit;
}
function extension_pickLine(a, p) {
  var t = Math.pow(a[0].strokeWidth || 1, 2),
    i = a.length,
    dx,
    dy,
    dd;
  while (--i >= 0) {
    if (a[i].defined === false) continue;
    dx = a[i].x - p[0];
    dy = a[i].y - p[1];
    dd = dx * dx + dy * dy;
    if (dd < t) return a[i];
  }
  return null;
}
function extension_pickTrail(a, p) {
  var i = a.length,
    dx,
    dy,
    dd;
  while (--i >= 0) {
    if (a[i].defined === false) continue;
    dx = a[i].x - p[0];
    dy = a[i].y - p[1];
    dd = dx * dx + dy * dy;
    dx = a[i].size || 1;
    if (dd < dx * dx) return a[i];
  }
  return null;
}

function extension_markMultiItemPath (type, shape, tip) {
  function attr(emit, item) {
    var items = item.mark.items;
    if (items.length) emit('d', shape(null, items));
  }
  function bound(bounds, mark) {
    var items = mark.items;
    if (items.length === 0) {
      return bounds;
    } else {
      shape(extension_boundContext(bounds), items);
      return extension_boundStroke(bounds, items[0]);
    }
  }
  function draw(context, items) {
    context.beginPath();
    shape(context, items);
  }
  const hit = extension_hitPath(draw);
  function pick(context, scene, x, y, gx, gy) {
    var items = scene.items,
      b = scene.bounds;
    if (!items || !items.length || b && !b.contains(gx, gy)) {
      return null;
    }
    x *= context.pixelRatio;
    y *= context.pixelRatio;
    return hit(context, items, x, y) ? items[0] : null;
  }
  return {
    type: type,
    tag: 'path',
    nested: true,
    attr: attr,
    bound: bound,
    draw: extension_drawOne(draw),
    pick: pick,
    isect: extension_intersectPoint,
    tip: tip
  };
}

var extension_vega_scenegraph_module_area = extension_markMultiItemPath('area', extension_area$1, extension_pickArea);

function extension_clip (context, scene) {
  var clip = scene.clip;
  context.save();
  if (extension_vega_util_module_isFunction(clip)) {
    context.beginPath();
    clip(context);
    context.clip();
  } else {
    extension_clipGroup(context, scene.group);
  }
}
function extension_clipGroup(context, group) {
  context.beginPath();
  extension_hasCornerRadius(group) ? extension_rectangle(context, group, 0, 0) : context.rect(0, 0, group.width || 0, group.height || 0);
  context.clip();
}

function extension_offset$1(item) {
  const sw = extension_vega_scenegraph_module_value(item.strokeWidth, 1);
  return item.strokeOffset != null ? item.strokeOffset : item.stroke && sw > 0.5 && sw < 1.5 ? 0.5 - Math.abs(sw - 1) : 0;
}
function extension_attr$5(emit, item) {
  emit('transform', extension_translateItem(item));
}
function extension_emitRectangle(emit, item) {
  const off = extension_offset$1(item);
  emit('d', extension_rectangle(null, item, off, off));
}
function extension_background(emit, item) {
  emit('class', 'background');
  emit('aria-hidden', true);
  extension_emitRectangle(emit, item);
}
function extension_foreground(emit, item) {
  emit('class', 'foreground');
  emit('aria-hidden', true);
  if (item.strokeForeground) {
    extension_emitRectangle(emit, item);
  } else {
    emit('d', '');
  }
}
function extension_content(emit, item, renderer) {
  const url = item.clip ? extension_clip$1(renderer, item, item) : null;
  emit('clip-path', url);
}
function extension_bound$5(bounds, group) {
  if (!group.clip && group.items) {
    const items = group.items,
      m = items.length;
    for (let j = 0; j < m; ++j) {
      bounds.union(items[j].bounds);
    }
  }
  if ((group.clip || group.width || group.height) && !group.noBound) {
    bounds.add(0, 0).add(group.width || 0, group.height || 0);
  }
  extension_boundStroke(bounds, group);
  return bounds.translate(group.x || 0, group.y || 0);
}
function extension_rectanglePath(context, group, x, y) {
  const off = extension_offset$1(group);
  context.beginPath();
  extension_rectangle(context, group, (x || 0) + off, (y || 0) + off);
}
const extension_hitBackground = extension_hitPath(extension_rectanglePath);
const extension_hitForeground = extension_hitPath(extension_rectanglePath, false);
const extension_hitCorner = extension_hitPath(extension_rectanglePath, true);
function extension_draw$4(context, scene, bounds, markTypes) {
  extension_vega_scenegraph_module_visit(scene, group => {
    const gx = group.x || 0,
      gy = group.y || 0,
      fore = group.strokeForeground,
      opacity = group.opacity == null ? 1 : group.opacity;

    // draw group background
    if ((group.stroke || group.fill) && opacity) {
      extension_rectanglePath(context, group, gx, gy);
      extension_blend(context, group);
      if (group.fill && extension_fill(context, group, opacity)) {
        context.fill();
      }
      if (group.stroke && !fore && extension_stroke(context, group, opacity)) {
        context.stroke();
      }
    }

    // setup graphics context, set clip and bounds
    context.save();
    context.translate(gx, gy);
    if (group.clip) extension_clipGroup(context, group);
    if (bounds) bounds.translate(-gx, -gy);

    // draw group contents
    extension_vega_scenegraph_module_visit(group, item => {
      if (item.marktype === 'group' || markTypes == null || markTypes.includes(item.marktype)) {
        this.draw(context, item, bounds, markTypes);
      }
    });

    // restore graphics context
    if (bounds) bounds.translate(gx, gy);
    context.restore();

    // draw group foreground
    if (fore && group.stroke && opacity) {
      extension_rectanglePath(context, group, gx, gy);
      extension_blend(context, group);
      if (extension_stroke(context, group, opacity)) {
        context.stroke();
      }
    }
  });
}
function extension_pick(context, scene, x, y, gx, gy) {
  if (scene.bounds && !scene.bounds.contains(gx, gy) || !scene.items) {
    return null;
  }
  const cx = x * context.pixelRatio,
    cy = y * context.pixelRatio;
  return extension_pickVisit(scene, group => {
    let hit, dx, dy;

    // first hit test bounding box
    const b = group.bounds;
    if (b && !b.contains(gx, gy)) return;

    // passed bounds check, test rectangular clip
    dx = group.x || 0;
    dy = group.y || 0;
    const dw = dx + (group.width || 0),
      dh = dy + (group.height || 0),
      c = group.clip;
    if (c && (gx < dx || gx > dw || gy < dy || gy > dh)) return;

    // adjust coordinate system
    context.save();
    context.translate(dx, dy);
    dx = gx - dx;
    dy = gy - dy;

    // test background for rounded corner clip
    if (c && extension_hasCornerRadius(group) && !extension_hitCorner(context, group, cx, cy)) {
      context.restore();
      return null;
    }
    const fore = group.strokeForeground,
      ix = scene.interactive !== false;

    // hit test against group foreground
    if (ix && fore && group.stroke && extension_hitForeground(context, group, cx, cy)) {
      context.restore();
      return group;
    }

    // hit test against contained marks
    hit = extension_pickVisit(group, mark => extension_pickMark(mark, dx, dy) ? this.pick(mark, x, y, dx, dy) : null);

    // hit test against group background
    if (!hit && ix && (group.fill || !fore && group.stroke) && extension_hitBackground(context, group, cx, cy)) {
      hit = group;
    }

    // restore state and return
    context.restore();
    return hit || null;
  });
}
function extension_pickMark(mark, x, y) {
  return (mark.interactive !== false || mark.marktype === 'group') && mark.bounds && mark.bounds.contains(x, y);
}
var extension_group = {
  type: 'group',
  tag: 'g',
  nested: false,
  attr: extension_attr$5,
  bound: extension_bound$5,
  draw: extension_draw$4,
  pick: extension_pick,
  isect: extension_intersectRect,
  content: extension_content,
  background: extension_background,
  foreground: extension_foreground
};

var extension_metadata = {
  'xmlns': 'http://www.w3.org/2000/svg',
  'xmlns:xlink': 'http://www.w3.org/1999/xlink',
  'version': '1.1'
};

function extension_getImage(item, renderer) {
  var image = item.image;
  if (!image || item.url && item.url !== image.url) {
    image = {
      complete: false,
      width: 0,
      height: 0
    };
    renderer.loadImage(item.url).then(image => {
      item.image = image;
      item.image.url = item.url;
    });
  }
  return image;
}
function extension_imageWidth(item, image) {
  return item.width != null ? item.width : !image || !image.width ? 0 : item.aspect !== false && item.height ? item.height * image.width / image.height : image.width;
}
function extension_imageHeight(item, image) {
  return item.height != null ? item.height : !image || !image.height ? 0 : item.aspect !== false && item.width ? item.width * image.height / image.width : image.height;
}
function extension_imageXOffset(align, w) {
  return align === 'center' ? w / 2 : align === 'right' ? w : 0;
}
function extension_imageYOffset(baseline, h) {
  return baseline === 'middle' ? h / 2 : baseline === 'bottom' ? h : 0;
}
function extension_attr$4(emit, item, renderer) {
  const img = extension_getImage(item, renderer),
    w = extension_imageWidth(item, img),
    h = extension_imageHeight(item, img),
    x = (item.x || 0) - extension_imageXOffset(item.align, w),
    y = (item.y || 0) - extension_imageYOffset(item.baseline, h),
    i = !img.src && img.toDataURL ? img.toDataURL() : img.src || '';
  emit('href', i, extension_metadata['xmlns:xlink'], 'xlink:href');
  emit('transform', extension_translate(x, y));
  emit('width', w);
  emit('height', h);
  emit('preserveAspectRatio', item.aspect === false ? 'none' : 'xMidYMid');
}
function extension_bound$4(bounds, item) {
  const img = item.image,
    w = extension_imageWidth(item, img),
    h = extension_imageHeight(item, img),
    x = (item.x || 0) - extension_imageXOffset(item.align, w),
    y = (item.y || 0) - extension_imageYOffset(item.baseline, h);
  return bounds.set(x, y, x + w, y + h);
}
function extension_draw$3(context, scene, bounds) {
  extension_vega_scenegraph_module_visit(scene, item => {
    if (bounds && !bounds.intersects(item.bounds)) return; // bounds check

    const img = extension_getImage(item, this);
    let w = extension_imageWidth(item, img);
    let h = extension_imageHeight(item, img);
    if (w === 0 || h === 0) return; // early exit

    let x = (item.x || 0) - extension_imageXOffset(item.align, w),
      y = (item.y || 0) - extension_imageYOffset(item.baseline, h),
      opacity,
      ar0,
      ar1,
      t;
    if (item.aspect !== false) {
      ar0 = img.width / img.height;
      ar1 = item.width / item.height;
      if (ar0 === ar0 && ar1 === ar1 && ar0 !== ar1) {
        if (ar1 < ar0) {
          t = w / ar0;
          y += (h - t) / 2;
          h = t;
        } else {
          t = h * ar0;
          x += (w - t) / 2;
          w = t;
        }
      }
    }
    if (img.complete || img.toDataURL) {
      extension_blend(context, item);
      context.globalAlpha = (opacity = item.opacity) != null ? opacity : 1;
      context.imageSmoothingEnabled = item.smooth !== false;
      context.drawImage(img, x, y, w, h);
    }
  });
}
var extension_vega_scenegraph_module_image = {
  type: 'image',
  tag: 'image',
  nested: false,
  attr: extension_attr$4,
  bound: extension_bound$4,
  draw: extension_draw$3,
  pick: extension_pick$1(),
  isect: extension_truthy,
  // bounds check is sufficient
  get: extension_getImage,
  xOffset: extension_imageXOffset,
  yOffset: extension_imageYOffset
};

var extension_vega_scenegraph_module_line = extension_markMultiItemPath('line', extension_line$1, extension_pickLine);

function extension_attr$3(emit, item) {
  var sx = item.scaleX || 1,
    sy = item.scaleY || 1;
  if (sx !== 1 || sy !== 1) {
    emit('vector-effect', 'non-scaling-stroke');
  }
  emit('transform', extension_transformItem(item));
  emit('d', item.path);
}
function extension_path$1(context, item) {
  var path = item.path;
  if (path == null) return true;
  var x = item.x || 0,
    y = item.y || 0,
    sx = item.scaleX || 1,
    sy = item.scaleY || 1,
    a = (item.angle || 0) * extension_DegToRad,
    cache = item.pathCache;
  if (!cache || cache.path !== path) {
    (item.pathCache = cache = extension_vega_scenegraph_module_parse(path)).path = path;
  }
  if (a && context.rotate && context.translate) {
    context.translate(x, y);
    context.rotate(a);
    extension_pathRender(context, cache, 0, 0, sx, sy);
    context.rotate(-a);
    context.translate(-x, -y);
  } else {
    extension_pathRender(context, cache, x, y, sx, sy);
  }
}
function extension_bound$3(bounds, item) {
  return extension_path$1(extension_boundContext(bounds, item.angle), item) ? bounds.set(0, 0, 0, 0) : extension_boundStroke(bounds, item, true);
}
var extension_path$2 = {
  type: 'path',
  tag: 'path',
  nested: false,
  attr: extension_attr$3,
  bound: extension_bound$3,
  draw: extension_drawAll(extension_path$1),
  pick: extension_pickPath(extension_path$1),
  isect: extension_intersectPath(extension_path$1)
};

function extension_attr$2(emit, item) {
  emit('d', extension_rectangle(null, item));
}
function extension_bound$2(bounds, item) {
  var x, y;
  return extension_boundStroke(bounds.set(x = item.x || 0, y = item.y || 0, x + item.width || 0, y + item.height || 0), item);
}
function extension_draw$2(context, item) {
  context.beginPath();
  extension_rectangle(context, item);
}
var extension_rect = {
  type: 'rect',
  tag: 'path',
  nested: false,
  attr: extension_attr$2,
  bound: extension_bound$2,
  draw: extension_drawAll(extension_draw$2),
  pick: extension_pickPath(extension_draw$2),
  isect: extension_intersectRect
};

function extension_attr$1(emit, item) {
  emit('transform', extension_translateItem(item));
  emit('x2', item.x2 != null ? item.x2 - (item.x || 0) : 0);
  emit('y2', item.y2 != null ? item.y2 - (item.y || 0) : 0);
}
function extension_bound$1(bounds, item) {
  var x1, y1;
  return extension_boundStroke(bounds.set(x1 = item.x || 0, y1 = item.y || 0, item.x2 != null ? item.x2 : x1, item.y2 != null ? item.y2 : y1), item);
}
function extension_vega_scenegraph_module_path(context, item, opacity) {
  var x1, y1, x2, y2;
  if (item.stroke && extension_stroke(context, item, opacity)) {
    x1 = item.x || 0;
    y1 = item.y || 0;
    x2 = item.x2 != null ? item.x2 : x1;
    y2 = item.y2 != null ? item.y2 : y1;
    context.beginPath();
    context.moveTo(x1, y1);
    context.lineTo(x2, y2);
    return true;
  }
  return false;
}
function extension_draw$1(context, scene, bounds) {
  extension_vega_scenegraph_module_visit(scene, item => {
    if (bounds && !bounds.intersects(item.bounds)) return; // bounds check
    var opacity = item.opacity == null ? 1 : item.opacity;
    if (opacity && extension_vega_scenegraph_module_path(context, item, opacity)) {
      extension_blend(context, item);
      context.stroke();
    }
  });
}
function extension_hit$1(context, item, x, y) {
  if (!context.isPointInStroke) return false;
  return extension_vega_scenegraph_module_path(context, item, 1) && context.isPointInStroke(x, y);
}
var extension_rule = {
  type: 'rule',
  tag: 'line',
  nested: false,
  attr: extension_attr$1,
  bound: extension_bound$1,
  draw: extension_draw$1,
  pick: extension_pick$1(extension_hit$1),
  isect: extension_intersectRule
};

var extension_shape = extension_markItemPath('shape', extension_shape$1);

var extension_symbol = extension_markItemPath('symbol', extension_symbol$1, extension_intersectPoint);

// memoize text width measurement
const extension_widthCache = extension_lruCache();
var extension_textMetrics = {
  height: extension_fontSize,
  measureWidth: extension_measureWidth,
  estimateWidth: extension_estimateWidth,
  width: extension_estimateWidth,
  canvas: extension_useCanvas
};
extension_useCanvas(true);
function extension_useCanvas(use) {
  extension_textMetrics.width = use && extension_context ? extension_measureWidth : extension_estimateWidth;
}

// make simple estimate if no canvas is available
function extension_estimateWidth(item, text) {
  return src_extension_estimateWidth(extension_textValue(item, text), extension_fontSize(item));
}
function src_extension_estimateWidth(text, currentFontHeight) {
  return ~~(0.8 * text.length * currentFontHeight);
}

// measure text width if canvas is available
function extension_measureWidth(item, text) {
  return extension_fontSize(item) <= 0 || !(text = extension_textValue(item, text)) ? 0 : src_extension_measureWidth(text, extension_font(item));
}
function src_extension_measureWidth(text, currentFont) {
  const key = `(${currentFont}) ${text}`;
  let width = extension_widthCache.get(key);
  if (width === undefined) {
    extension_context.font = currentFont;
    width = extension_context.measureText(text).width;
    extension_widthCache.set(key, width);
  }
  return width;
}
function extension_fontSize(item) {
  return item.fontSize != null ? +item.fontSize || 0 : 11;
}
function extension_lineHeight(item) {
  return item.lineHeight != null ? item.lineHeight : extension_fontSize(item) + 2;
}
function extension_lineArray(_) {
  return extension_vega_util_module_isArray(_) ? _.length > 1 ? _ : _[0] : _;
}
function extension_textLines(item) {
  return extension_lineArray(item.lineBreak && item.text && !extension_vega_util_module_isArray(item.text) ? item.text.split(item.lineBreak) : item.text);
}
function extension_multiLineOffset(item) {
  const tl = extension_textLines(item);
  return (extension_vega_util_module_isArray(tl) ? tl.length - 1 : 0) * extension_lineHeight(item);
}
function extension_textValue(item, line) {
  const text = line == null ? '' : (line + '').trim();
  return item.limit > 0 && text.length ? extension_vega_scenegraph_module_truncate(item, text) : text;
}
function extension_widthGetter(item) {
  if (extension_textMetrics.width === extension_measureWidth) {
    // we are using canvas
    const currentFont = extension_font(item);
    return text => src_extension_measureWidth(text, currentFont);
  } else if (extension_textMetrics.width === extension_estimateWidth) {
    // we are relying on estimates
    const currentFontHeight = extension_fontSize(item);
    return text => src_extension_estimateWidth(text, currentFontHeight);
  } else {
    // User defined textMetrics.width function in use (e.g. vl-convert)
    return text => extension_textMetrics.width(item, text);
  }
}
function extension_vega_scenegraph_module_truncate(item, text) {
  var limit = +item.limit,
    width = extension_widthGetter(item);
  if (width(text) < limit) return text;
  var ellipsis = item.ellipsis || '\u2026',
    rtl = item.dir === 'rtl',
    lo = 0,
    hi = text.length,
    mid;
  limit -= width(ellipsis);
  if (rtl) {
    while (lo < hi) {
      mid = lo + hi >>> 1;
      if (width(text.slice(mid)) > limit) lo = mid + 1;else hi = mid;
    }
    return ellipsis + text.slice(lo);
  } else {
    while (lo < hi) {
      mid = 1 + (lo + hi >>> 1);
      if (width(text.slice(0, mid)) < limit) lo = mid;else hi = mid - 1;
    }
    return text.slice(0, lo) + ellipsis;
  }
}
function extension_fontFamily(item, quote) {
  var font = item.font;
  return (quote && font ? String(font).replace(/"/g, '\'') : font) || 'sans-serif';
}
function extension_font(item, quote) {
  return '' + (item.fontStyle ? item.fontStyle + ' ' : '') + (item.fontVariant ? item.fontVariant + ' ' : '') + (item.fontWeight ? item.fontWeight + ' ' : '') + extension_fontSize(item) + 'px ' + extension_fontFamily(item, quote);
}
function extension_vega_scenegraph_module_offset(item) {
  // perform our own font baseline calculation
  // why? not all browsers support SVG 1.1 'alignment-baseline' :(
  // this also ensures consistent layout across renderers
  var baseline = item.baseline,
    h = extension_fontSize(item);
  return Math.round(baseline === 'top' ? 0.79 * h : baseline === 'middle' ? 0.30 * h : baseline === 'bottom' ? -0.21 * h : baseline === 'line-top' ? 0.29 * h + 0.5 * extension_lineHeight(item) : baseline === 'line-bottom' ? 0.29 * h - 0.5 * extension_lineHeight(item) : 0);
}

const extension_textAlign = {
  'left': 'start',
  'center': 'middle',
  'right': 'end'
};
const extension_tempBounds = new extension_Bounds();
function extension_anchorPoint(item) {
  var x = item.x || 0,
    y = item.y || 0,
    r = item.radius || 0,
    t;
  if (r) {
    t = (item.theta || 0) - extension_HalfPi;
    x += r * Math.cos(t);
    y += r * Math.sin(t);
  }
  extension_tempBounds.x1 = x;
  extension_tempBounds.y1 = y;
  return extension_tempBounds;
}
function extension_vega_scenegraph_module_attr(emit, item) {
  var dx = item.dx || 0,
    dy = (item.dy || 0) + extension_vega_scenegraph_module_offset(item),
    p = extension_anchorPoint(item),
    x = p.x1,
    y = p.y1,
    a = item.angle || 0,
    t;
  emit('text-anchor', extension_textAlign[item.align] || 'start');
  if (a) {
    t = extension_translate(x, y) + ' ' + extension_rotate(a);
    if (dx || dy) t += ' ' + extension_translate(dx, dy);
  } else {
    t = extension_translate(x + dx, y + dy);
  }
  emit('transform', t);
}
function extension_bound(bounds, item, mode) {
  var h = extension_textMetrics.height(item),
    a = item.align,
    p = extension_anchorPoint(item),
    x = p.x1,
    y = p.y1,
    dx = item.dx || 0,
    dy = (item.dy || 0) + extension_vega_scenegraph_module_offset(item) - Math.round(0.8 * h),
    // use 4/5 offset
    tl = extension_textLines(item),
    w;

  // get dimensions
  if (extension_vega_util_module_isArray(tl)) {
    // multi-line text
    h += extension_lineHeight(item) * (tl.length - 1);
    w = tl.reduce((w, t) => Math.max(w, extension_textMetrics.width(item, t)), 0);
  } else {
    // single-line text
    w = extension_textMetrics.width(item, tl);
  }

  // horizontal alignment
  if (a === 'center') {
    dx -= w / 2;
  } else if (a === 'right') {
    dx -= w;
  } else ;
  bounds.set(dx += x, dy += y, dx + w, dy + h);
  if (item.angle && !mode) {
    bounds.rotate(item.angle * extension_DegToRad, x, y);
  } else if (mode === 2) {
    return bounds.rotatedPoints(item.angle * extension_DegToRad, x, y);
  }
  return bounds;
}
function extension_vega_scenegraph_module_draw(context, scene, bounds) {
  extension_vega_scenegraph_module_visit(scene, item => {
    var opacity = item.opacity == null ? 1 : item.opacity,
      p,
      x,
      y,
      i,
      lh,
      tl,
      str;
    if (bounds && !bounds.intersects(item.bounds) ||
    // bounds check
    opacity === 0 || item.fontSize <= 0 || item.text == null || item.text.length === 0) return;
    context.font = extension_font(item);
    context.textAlign = item.align || 'left';
    p = extension_anchorPoint(item);
    x = p.x1, y = p.y1;
    if (item.angle) {
      context.save();
      context.translate(x, y);
      context.rotate(item.angle * extension_DegToRad);
      x = y = 0; // reset x, y
    }
    x += item.dx || 0;
    y += (item.dy || 0) + extension_vega_scenegraph_module_offset(item);
    tl = extension_textLines(item);
    extension_blend(context, item);
    if (extension_vega_util_module_isArray(tl)) {
      lh = extension_lineHeight(item);
      for (i = 0; i < tl.length; ++i) {
        str = extension_textValue(item, tl[i]);
        if (item.fill && extension_fill(context, item, opacity)) {
          context.fillText(str, x, y);
        }
        if (item.stroke && extension_stroke(context, item, opacity)) {
          context.strokeText(str, x, y);
        }
        y += lh;
      }
    } else {
      str = extension_textValue(item, tl);
      if (item.fill && extension_fill(context, item, opacity)) {
        context.fillText(str, x, y);
      }
      if (item.stroke && extension_stroke(context, item, opacity)) {
        context.strokeText(str, x, y);
      }
    }
    if (item.angle) context.restore();
  });
}
function extension_hit(context, item, x, y, gx, gy) {
  if (item.fontSize <= 0) return false;
  if (!item.angle) return true; // bounds sufficient if no rotation

  // project point into space of unrotated bounds
  var p = extension_anchorPoint(item),
    ax = p.x1,
    ay = p.y1,
    b = extension_bound(extension_tempBounds, item, 1),
    a = -item.angle * extension_DegToRad,
    cos = Math.cos(a),
    sin = Math.sin(a),
    px = cos * gx - sin * gy + (ax - cos * ax + sin * ay),
    py = sin * gx + cos * gy + (ay - sin * ax - cos * ay);
  return b.contains(px, py);
}
function extension_intersectText(item, box) {
  const p = extension_bound(extension_tempBounds, item, 2);
  return extension_intersectBoxLine(box, p[0], p[1], p[2], p[3]) || extension_intersectBoxLine(box, p[0], p[1], p[4], p[5]) || extension_intersectBoxLine(box, p[4], p[5], p[6], p[7]) || extension_intersectBoxLine(box, p[2], p[3], p[6], p[7]);
}
var extension_vega_scenegraph_module_text = {
  type: 'text',
  tag: 'text',
  nested: false,
  attr: extension_vega_scenegraph_module_attr,
  bound: extension_bound,
  draw: extension_vega_scenegraph_module_draw,
  pick: extension_pick$1(extension_hit),
  isect: extension_intersectText
};

var extension_trail = extension_markMultiItemPath('trail', extension_trail$1, extension_pickTrail);

var extension_Marks = {
  arc: extension_vega_scenegraph_module_arc,
  area: extension_vega_scenegraph_module_area,
  group: extension_group,
  image: extension_vega_scenegraph_module_image,
  line: extension_vega_scenegraph_module_line,
  path: extension_path$2,
  rect: extension_rect,
  rule: extension_rule,
  shape: extension_shape,
  symbol: extension_symbol,
  text: extension_vega_scenegraph_module_text,
  trail: extension_trail
};

function extension_boundItem (item, func, opt) {
  var type = extension_Marks[item.mark.marktype],
    bound = func || type.bound;
  if (type.nested) item = item.mark;
  return bound(item.bounds || (item.bounds = new extension_Bounds()), item, opt);
}

var extension_DUMMY = {
  mark: null
};
function extension_boundMark (mark, bounds, opt) {
  var type = extension_Marks[mark.marktype],
    bound = type.bound,
    items = mark.items,
    hasItems = items && items.length,
    i,
    n,
    item,
    b;
  if (type.nested) {
    if (hasItems) {
      item = items[0];
    } else {
      // no items, fake it
      extension_DUMMY.mark = mark;
      item = extension_DUMMY;
    }
    b = extension_boundItem(item, bound, opt);
    bounds = bounds && bounds.union(b) || b;
    return bounds;
  }
  bounds = bounds || mark.bounds && mark.bounds.clear() || new extension_Bounds();
  if (hasItems) {
    for (i = 0, n = items.length; i < n; ++i) {
      bounds.union(extension_boundItem(items[i], bound, opt));
    }
  }
  return mark.bounds = bounds;
}

const extension_keys = ['marktype', 'name', 'role', 'interactive', 'clip', 'items', 'zindex', 'x', 'y', 'width', 'height', 'align', 'baseline',
// layout
'fill', 'fillOpacity', 'opacity', 'blend',
// fill
'stroke', 'strokeOpacity', 'strokeWidth', 'strokeCap',
// stroke
'strokeDash', 'strokeDashOffset',
// stroke dash
'strokeForeground', 'strokeOffset',
// group
'startAngle', 'endAngle', 'innerRadius', 'outerRadius',
// arc
'cornerRadius', 'padAngle',
// arc, rect
'cornerRadiusTopLeft', 'cornerRadiusTopRight',
// rect, group
'cornerRadiusBottomLeft', 'cornerRadiusBottomRight', 'interpolate', 'tension', 'orient', 'defined',
// area, line
'url', 'aspect', 'smooth',
// image
'path', 'scaleX', 'scaleY',
// path
'x2', 'y2',
// rule
'size', 'shape',
// symbol
'text', 'angle', 'theta', 'radius', 'dir', 'dx', 'dy',
// text
'ellipsis', 'limit', 'lineBreak', 'lineHeight', 'font', 'fontSize', 'fontWeight', 'fontStyle', 'fontVariant',
// font
'description', 'aria', 'ariaRole', 'ariaRoleDescription' // aria
];
function extension_sceneToJSON(scene, indent) {
  return JSON.stringify(scene, extension_keys, indent);
}
function extension_sceneFromJSON(json) {
  const scene = typeof json === 'string' ? JSON.parse(json) : json;
  return extension_initialize(scene);
}
function extension_initialize(scene) {
  var type = scene.marktype,
    items = scene.items,
    parent,
    i,
    n;
  if (items) {
    for (i = 0, n = items.length; i < n; ++i) {
      parent = type ? 'mark' : 'group';
      items[i][parent] = scene;
      if (items[i].zindex) items[i][parent].zdirty = true;
      if ('group' === (type || parent)) extension_initialize(items[i]);
    }
  }
  if (type) extension_boundMark(scene);
  return scene;
}

class extension_Scenegraph {
  constructor(scene) {
    if (arguments.length) {
      this.root = extension_sceneFromJSON(scene);
    } else {
      this.root = extension_createMark({
        marktype: 'group',
        name: 'root',
        role: 'frame'
      });
      this.root.items = [new extension_GroupItem(this.root)];
    }
  }
  toJSON(indent) {
    return extension_sceneToJSON(this.root, indent || 0);
  }
  mark(markdef, group, index) {
    group = group || this.root.items[0];
    const mark = extension_createMark(markdef, group);
    group.items[index] = mark;
    if (mark.zindex) mark.group.zdirty = true;
    return mark;
  }
}
function extension_createMark(def, group) {
  const mark = {
    bounds: new extension_Bounds(),
    clip: !!def.clip,
    group: group,
    interactive: def.interactive === false ? false : true,
    items: [],
    marktype: def.marktype,
    name: def.name || undefined,
    role: def.role || undefined,
    zindex: def.zindex || 0
  };

  // add accessibility properties if defined
  if (def.aria != null) {
    mark.aria = def.aria;
  }
  if (def.description) {
    mark.description = def.description;
  }
  return mark;
}

// create a new DOM element
function extension_domCreate(doc, tag, ns) {
  if (!doc && typeof document !== 'undefined' && document.createElement) {
    doc = document;
  }
  return doc ? ns ? doc.createElementNS(ns, tag) : doc.createElement(tag) : null;
}

// find first child element with matching tag
function extension_domFind(el, tag) {
  tag = tag.toLowerCase();
  var nodes = el.childNodes,
    i = 0,
    n = nodes.length;
  for (; i < n; ++i) if (nodes[i].tagName.toLowerCase() === tag) {
    return nodes[i];
  }
}

// retrieve child element at given index
// create & insert if doesn't exist or if tags do not match
function extension_domChild(el, index, tag, ns) {
  var a = el.childNodes[index],
    b;
  if (!a || a.tagName.toLowerCase() !== tag.toLowerCase()) {
    b = a || null;
    a = extension_domCreate(el.ownerDocument, tag, ns);
    el.insertBefore(a, b);
  }
  return a;
}

// remove all child elements at or above the given index
function extension_domClear(el, index) {
  var nodes = el.childNodes,
    curr = nodes.length;
  while (curr > index) el.removeChild(nodes[--curr]);
  return el;
}

// generate css class name for mark
function extension_cssClass(mark) {
  return 'mark-' + mark.marktype + (mark.role ? ' role-' + mark.role : '') + (mark.name ? ' ' + mark.name : '');
}

function extension_vega_scenegraph_module_point (event, el) {
  const rect = el.getBoundingClientRect();
  return [event.clientX - rect.left - (el.clientLeft || 0), event.clientY - rect.top - (el.clientTop || 0)];
}

function extension_resolveItem (item, event, el, origin) {
  var mark = item && item.mark,
    mdef,
    p;
  if (mark && (mdef = extension_Marks[mark.marktype]).tip) {
    p = extension_vega_scenegraph_module_point(event, el);
    p[0] -= origin[0];
    p[1] -= origin[1];
    while (item = item.mark.group) {
      p[0] -= item.x || 0;
      p[1] -= item.y || 0;
    }
    item = mdef.tip(mark.items, p);
  }
  return item;
}

class extension_Handler {
  /**
   * Create a new Handler instance.
   * @param {object} [customLoader] - Optional loader instance for
   *   href URL sanitization. If not specified, a standard loader
   *   instance will be generated.
   * @param {function} [customTooltip] - Optional tooltip handler
   *   function for custom tooltip display.
   * @constructor
   */
  constructor(customLoader, customTooltip) {
    this._active = null;
    this._handlers = {};
    this._loader = customLoader || extension_loader();
    this._tooltip = customTooltip || extension_defaultTooltip;
  }

  /**
   * Initialize a new Handler instance.
   * @param {DOMElement} el - The containing DOM element for the display.
   * @param {Array<number>} origin - The origin of the display, in pixels.
   *   The coordinate system will be translated to this point.
   * @param {object} [obj] - Optional context object that should serve as
   *   the "this" context for event callbacks.
   * @return {Handler} - This handler instance.
   */
  initialize(el, origin, obj) {
    this._el = el;
    this._obj = obj || null;
    return this.origin(origin);
  }

  /**
   * Returns the parent container element for a visualization.
   * @return {DOMElement} - The containing DOM element.
   */
  element() {
    return this._el;
  }

  /**
   * Returns the scene element (e.g., canvas or SVG) of the visualization
   * Subclasses must override if the first child is not the scene element.
   * @return {DOMElement} - The scene (e.g., canvas or SVG) element.
   */
  canvas() {
    return this._el && this._el.firstChild;
  }

  /**
   * Get / set the origin coordinates of the visualization.
   */
  origin(origin) {
    if (arguments.length) {
      this._origin = origin || [0, 0];
      return this;
    } else {
      return this._origin.slice();
    }
  }

  /**
   * Get / set the scenegraph root.
   */
  scene(scene) {
    if (!arguments.length) return this._scene;
    this._scene = scene;
    return this;
  }

  /**
   * Add an event handler. Subclasses should override this method.
   */
  on( /*type, handler*/) {}

  /**
   * Remove an event handler. Subclasses should override this method.
   */
  off( /*type, handler*/) {}

  /**
   * Utility method for finding the array index of an event handler.
   * @param {Array} h - An array of registered event handlers.
   * @param {string} type - The event type.
   * @param {function} handler - The event handler instance to find.
   * @return {number} - The handler's array index or -1 if not registered.
   */
  _handlerIndex(h, type, handler) {
    for (let i = h ? h.length : 0; --i >= 0;) {
      if (h[i].type === type && (!handler || h[i].handler === handler)) {
        return i;
      }
    }
    return -1;
  }

  /**
   * Returns an array with registered event handlers.
   * @param {string} [type] - The event type to query. Any annotations
   *   are ignored; for example, for the argument "click.foo", ".foo" will
   *   be ignored and the method returns all "click" handlers. If type is
   *   null or unspecified, this method returns handlers for all types.
   * @return {Array} - A new array containing all registered event handlers.
   */
  handlers(type) {
    const h = this._handlers,
      a = [];
    if (type) {
      a.push(...h[this.eventName(type)]);
    } else {
      for (const k in h) {
        a.push(...h[k]);
      }
    }
    return a;
  }

  /**
   * Parses an event name string to return the specific event type.
   * For example, given "click.foo" returns "click"
   * @param {string} name - The input event type string.
   * @return {string} - A string with the event type only.
   */
  eventName(name) {
    const i = name.indexOf('.');
    return i < 0 ? name : name.slice(0, i);
  }

  /**
   * Handle hyperlink navigation in response to an item.href value.
   * @param {Event} event - The event triggering hyperlink navigation.
   * @param {Item} item - The scenegraph item.
   * @param {string} href - The URL to navigate to.
   */
  handleHref(event, item, href) {
    this._loader.sanitize(href, {
      context: 'href'
    }).then(opt => {
      const e = new MouseEvent(event.type, event),
        a = extension_domCreate(null, 'a');
      for (const name in opt) a.setAttribute(name, opt[name]);
      a.dispatchEvent(e);
    }).catch(() => {});
  }

  /**
   * Handle tooltip display in response to an item.tooltip value.
   * @param {Event} event - The event triggering tooltip display.
   * @param {Item} item - The scenegraph item.
   * @param {boolean} show - A boolean flag indicating whether
   *   to show or hide a tooltip for the given item.
   */
  handleTooltip(event, item, show) {
    if (item && item.tooltip != null) {
      item = extension_resolveItem(item, event, this.canvas(), this._origin);
      const value = show && item && item.tooltip || null;
      this._tooltip.call(this._obj, this, event, item, value);
    }
  }

  /**
   * Returns the size of a scenegraph item and its position relative
   * to the viewport.
   * @param {Item} item - The scenegraph item.
   * @return {object} - A bounding box object (compatible with the
   *   DOMRect type) consisting of x, y, width, heigh, top, left,
   *   right, and bottom properties.
   */
  getItemBoundingClientRect(item) {
    const el = this.canvas();
    if (!el) return;
    const rect = el.getBoundingClientRect(),
      origin = this._origin,
      bounds = item.bounds,
      width = bounds.width(),
      height = bounds.height();
    let x = bounds.x1 + origin[0] + rect.left,
      y = bounds.y1 + origin[1] + rect.top;

    // translate coordinate for each parent group
    while (item.mark && (item = item.mark.group)) {
      x += item.x || 0;
      y += item.y || 0;
    }

    // return DOMRect-compatible bounding box
    return {
      x,
      y,
      width,
      height,
      left: x,
      top: y,
      right: x + width,
      bottom: y + height
    };
  }
}

// The default tooltip display handler.
// Sets the HTML title attribute on the visualization container.
function extension_defaultTooltip(handler, event, item, value) {
  handler.element().setAttribute('title', value || '');
}

class extension_Renderer {
  /**
   * Create a new Renderer instance.
   * @param {object} [loader] - Optional loader instance for
   *   image and href URL sanitization. If not specified, a
   *   standard loader instance will be generated.
   * @constructor
   */
  constructor(loader) {
    this._el = null;
    this._bgcolor = null;
    this._loader = new extension_ResourceLoader(loader);
  }

  /**
   * Initialize a new Renderer instance.
   * @param {DOMElement} el - The containing DOM element for the display.
   * @param {number} width - The coordinate width of the display, in pixels.
   * @param {number} height - The coordinate height of the display, in pixels.
   * @param {Array<number>} origin - The origin of the display, in pixels.
   *   The coordinate system will be translated to this point.
   * @param {number} [scaleFactor=1] - Optional scaleFactor by which to multiply
   *   the width and height to determine the final pixel size.
   * @return {Renderer} - This renderer instance.
   */
  initialize(el, width, height, origin, scaleFactor) {
    this._el = el;
    return this.resize(width, height, origin, scaleFactor);
  }

  /**
   * Returns the parent container element for a visualization.
   * @return {DOMElement} - The containing DOM element.
   */
  element() {
    return this._el;
  }

  /**
   * Returns the scene element (e.g., canvas or SVG) of the visualization
   * Subclasses must override if the first child is not the scene element.
   * @return {DOMElement} - The scene (e.g., canvas or SVG) element.
   */
  canvas() {
    return this._el && this._el.firstChild;
  }

  /**
   * Get / set the background color.
   */
  background(bgcolor) {
    if (arguments.length === 0) return this._bgcolor;
    this._bgcolor = bgcolor;
    return this;
  }

  /**
   * Resize the display.
   * @param {number} width - The new coordinate width of the display, in pixels.
   * @param {number} height - The new coordinate height of the display, in pixels.
   * @param {Array<number>} origin - The new origin of the display, in pixels.
   *   The coordinate system will be translated to this point.
   * @param {number} [scaleFactor=1] - Optional scaleFactor by which to multiply
   *   the width and height to determine the final pixel size.
   * @return {Renderer} - This renderer instance;
   */
  resize(width, height, origin, scaleFactor) {
    this._width = width;
    this._height = height;
    this._origin = origin || [0, 0];
    this._scale = scaleFactor || 1;
    return this;
  }

  /**
   * Report a dirty item whose bounds should be redrawn.
   * This base class method does nothing. Subclasses that perform
   * incremental should implement this method.
   * @param {Item} item - The dirty item whose bounds should be redrawn.
   */
  dirty( /*item*/) {}

  /**
   * Render an input scenegraph, potentially with a set of dirty items.
   * This method will perform an immediate rendering with available resources.
   * The renderer may also need to perform image loading to perform a complete
   * render. This process can lead to asynchronous re-rendering of the scene
   * after this method returns. To receive notification when rendering is
   * complete, use the renderAsync method instead.
   * @param {object} scene - The root mark of a scenegraph to render.
   * @param {Array} markTypes - Array of the mark types to render.
   *                            If undefined, render all mark types
   * @return {Renderer} - This renderer instance.
   */
  render(scene, markTypes) {
    const r = this;

    // bind arguments into a render call, and cache it
    // this function may be subsequently called for async redraw
    r._call = function () {
      r._render(scene, markTypes);
    };

    // invoke the renderer
    r._call();

    // clear the cached call for garbage collection
    // async redraws will stash their own copy
    r._call = null;
    return r;
  }

  /**
   * Internal rendering method. Renderer subclasses should override this
   * method to actually perform rendering.
   * @param {object} scene - The root mark of a scenegraph to render.
   * @param {Array} markTypes - Array of the mark types to render.
   *                            If undefined, render all mark types
   */
  _render( /*scene, markTypes*/
  ) {
    // subclasses to override
  }

  /**
   * Asynchronous rendering method. Similar to render, but returns a Promise
   * that resolves when all rendering is completed. Sometimes a renderer must
   * perform image loading to get a complete rendering. The returned
   * Promise will not resolve until this process completes.
   * @param {object} scene - The root mark of a scenegraph to render.
   * @param {Array} markTypes - Array of the mark types to render.
   *                            If undefined, render all mark types
   * @return {Promise} - A Promise that resolves when rendering is complete.
   */
  renderAsync(scene, markTypes) {
    const r = this.render(scene, markTypes);
    return this._ready ? this._ready.then(() => r) : Promise.resolve(r);
  }

  /**
   * Internal method for asynchronous resource loading.
   * Proxies method calls to the ImageLoader, and tracks loading
   * progress to invoke a re-render once complete.
   * @param {string} method - The method name to invoke on the ImageLoader.
   * @param {string} uri - The URI for the requested resource.
   * @return {Promise} - A Promise that resolves to the requested resource.
   */
  _load(method, uri) {
    var r = this,
      p = r._loader[method](uri);
    if (!r._ready) {
      // re-render the scene when loading completes
      const call = r._call;
      r._ready = r._loader.ready().then(redraw => {
        if (redraw) call();
        r._ready = null;
      });
    }
    return p;
  }

  /**
   * Sanitize a URL to include as a hyperlink in the rendered scene.
   * This method proxies a call to ImageLoader.sanitizeURL, but also tracks
   * image loading progress and invokes a re-render once complete.
   * @param {string} uri - The URI string to sanitize.
   * @return {Promise} - A Promise that resolves to the sanitized URL.
   */
  sanitizeURL(uri) {
    return this._load('sanitizeURL', uri);
  }

  /**
   * Requests an image to include in the rendered scene.
   * This method proxies a call to ImageLoader.loadImage, but also tracks
   * image loading progress and invokes a re-render once complete.
   * @param {string} uri - The URI string of the image.
   * @return {Promise} - A Promise that resolves to the loaded Image.
   */
  loadImage(uri) {
    return this._load('loadImage', uri);
  }
}

const extension_KeyDownEvent = 'keydown';
const extension_KeyPressEvent = 'keypress';
const extension_KeyUpEvent = 'keyup';
const extension_DragEnterEvent = 'dragenter';
const extension_DragLeaveEvent = 'dragleave';
const extension_DragOverEvent = 'dragover';
const extension_PointerDownEvent = 'pointerdown';
const extension_PointerUpEvent = 'pointerup';
const extension_PointerMoveEvent = 'pointermove';
const extension_PointerOutEvent = 'pointerout';
const extension_PointerOverEvent = 'pointerover';
const extension_MouseDownEvent = 'mousedown';
const extension_MouseUpEvent = 'mouseup';
const extension_MouseMoveEvent = 'mousemove';
const extension_MouseOutEvent = 'mouseout';
const extension_MouseOverEvent = 'mouseover';
const extension_ClickEvent = 'click';
const extension_DoubleClickEvent = 'dblclick';
const extension_WheelEvent = 'wheel';
const extension_MouseWheelEvent = 'mousewheel';
const extension_TouchStartEvent = 'touchstart';
const extension_TouchMoveEvent = 'touchmove';
const extension_TouchEndEvent = 'touchend';
const extension_Events = [extension_KeyDownEvent, extension_KeyPressEvent, extension_KeyUpEvent, extension_DragEnterEvent, extension_DragLeaveEvent, extension_DragOverEvent, extension_PointerDownEvent, extension_PointerUpEvent, extension_PointerMoveEvent, extension_PointerOutEvent, extension_PointerOverEvent, extension_MouseDownEvent, extension_MouseUpEvent, extension_MouseMoveEvent, extension_MouseOutEvent, extension_MouseOverEvent, extension_ClickEvent, extension_DoubleClickEvent, extension_WheelEvent, extension_MouseWheelEvent, extension_TouchStartEvent, extension_TouchMoveEvent, extension_TouchEndEvent];
const extension_TooltipShowEvent = extension_PointerMoveEvent;
const extension_TooltipHideEvent = extension_MouseOutEvent;
const extension_HrefEvent = extension_ClickEvent;

class extension_CanvasHandler extends extension_Handler {
  constructor(loader, tooltip) {
    super(loader, tooltip);
    this._down = null;
    this._touch = null;
    this._first = true;
    this._events = {};

    // supported events
    this.events = extension_Events;
    this.pointermove = extension_move([extension_PointerMoveEvent, extension_MouseMoveEvent], [extension_PointerOverEvent, extension_MouseOverEvent], [extension_PointerOutEvent, extension_MouseOutEvent]);
    this.dragover = extension_move([extension_DragOverEvent], [extension_DragEnterEvent], [extension_DragLeaveEvent]), this.pointerout = extension_inactive([extension_PointerOutEvent, extension_MouseOutEvent]);
    this.dragleave = extension_inactive([extension_DragLeaveEvent]);
  }
  initialize(el, origin, obj) {
    this._canvas = el && extension_domFind(el, 'canvas');

    // add minimal events required for proper state management
    [extension_ClickEvent, extension_MouseDownEvent, extension_PointerDownEvent, extension_PointerMoveEvent, extension_PointerOutEvent, extension_DragLeaveEvent].forEach(type => extension_eventListenerCheck(this, type));
    return super.initialize(el, origin, obj);
  }

  // return the backing canvas instance
  canvas() {
    return this._canvas;
  }

  // retrieve the current canvas context
  context() {
    return this._canvas.getContext('2d');
  }

  // to keep old versions of firefox happy
  DOMMouseScroll(evt) {
    this.fire(extension_MouseWheelEvent, evt);
  }
  pointerdown(evt) {
    this._down = this._active;
    this.fire(extension_PointerDownEvent, evt);
  }
  mousedown(evt) {
    this._down = this._active;
    this.fire(extension_MouseDownEvent, evt);
  }
  click(evt) {
    if (this._down === this._active) {
      this.fire(extension_ClickEvent, evt);
      this._down = null;
    }
  }
  touchstart(evt) {
    this._touch = this.pickEvent(evt.changedTouches[0]);
    if (this._first) {
      this._active = this._touch;
      this._first = false;
    }
    this.fire(extension_TouchStartEvent, evt, true);
  }
  touchmove(evt) {
    this.fire(extension_TouchMoveEvent, evt, true);
  }
  touchend(evt) {
    this.fire(extension_TouchEndEvent, evt, true);
    this._touch = null;
  }

  // fire an event
  fire(type, evt, touch) {
    const a = touch ? this._touch : this._active,
      h = this._handlers[type];

    // set event type relative to scenegraph items
    evt.vegaType = type;

    // handle hyperlinks and tooltips first
    if (type === extension_HrefEvent && a && a.href) {
      this.handleHref(evt, a, a.href);
    } else if (type === extension_TooltipShowEvent || type === extension_TooltipHideEvent) {
      this.handleTooltip(evt, a, type !== extension_TooltipHideEvent);
    }

    // invoke all registered handlers
    if (h) {
      for (let i = 0, len = h.length; i < len; ++i) {
        h[i].handler.call(this._obj, evt, a);
      }
    }
  }

  // add an event handler
  on(type, handler) {
    const name = this.eventName(type),
      h = this._handlers,
      i = this._handlerIndex(h[name], type, handler);
    if (i < 0) {
      extension_eventListenerCheck(this, type);
      (h[name] || (h[name] = [])).push({
        type: type,
        handler: handler
      });
    }
    return this;
  }

  // remove an event handler
  off(type, handler) {
    const name = this.eventName(type),
      h = this._handlers[name],
      i = this._handlerIndex(h, type, handler);
    if (i >= 0) {
      h.splice(i, 1);
    }
    return this;
  }
  pickEvent(evt) {
    const p = extension_vega_scenegraph_module_point(evt, this._canvas),
      o = this._origin;
    return this.pick(this._scene, p[0], p[1], p[0] - o[0], p[1] - o[1]);
  }

  // find the scenegraph item at the current pointer position
  // x, y -- the absolute x, y pointer coordinates on the canvas element
  // gx, gy -- the relative coordinates within the current group
  pick(scene, x, y, gx, gy) {
    const g = this.context(),
      mark = extension_Marks[scene.marktype];
    return mark.pick.call(this, g, scene, x, y, gx, gy);
  }
}
const extension_eventBundle = type => type === extension_TouchStartEvent || type === extension_TouchMoveEvent || type === extension_TouchEndEvent ? [extension_TouchStartEvent, extension_TouchMoveEvent, extension_TouchEndEvent] : [type];

// lazily add listeners to the canvas as needed
function extension_eventListenerCheck(handler, type) {
  extension_eventBundle(type).forEach(_ => extension_addEventListener(handler, _));
}
function extension_addEventListener(handler, type) {
  const canvas = handler.canvas();
  if (canvas && !handler._events[type]) {
    handler._events[type] = 1;
    canvas.addEventListener(type, handler[type] ? evt => handler[type](evt) : evt => handler.fire(type, evt));
  }
}
function extension_fireAll(handler, types, event) {
  types.forEach(type => handler.fire(type, event));
}
function extension_move(moveEvents, overEvents, outEvents) {
  return function (evt) {
    const a = this._active,
      p = this.pickEvent(evt);
    if (p === a) {
      // active item and picked item are the same
      extension_fireAll(this, moveEvents, evt); // fire move
    } else {
      // active item and picked item are different
      if (!a || !a.exit) {
        // fire out for prior active item
        // suppress if active item was removed from scene
        extension_fireAll(this, outEvents, evt);
      }
      this._active = p; // set new active item
      extension_fireAll(this, overEvents, evt); // fire over for new active item
      extension_fireAll(this, moveEvents, evt); // fire move for new active item
    }
  };
}
function extension_inactive(types) {
  return function (evt) {
    extension_fireAll(this, types, evt);
    this._active = null;
  };
}

function extension_devicePixelRatio() {
  return typeof window !== 'undefined' ? window.devicePixelRatio || 1 : 1;
}
function extension_resize (canvas, width, height, origin, scaleFactor, opt) {
  const inDOM = typeof HTMLElement !== 'undefined' && canvas instanceof HTMLElement && canvas.parentNode != null,
    context = canvas.getContext('2d'),
    ratio = inDOM ? extension_devicePixelRatio() : scaleFactor;
  canvas.width = width * ratio;
  canvas.height = height * ratio;
  for (const key in opt) {
    context[key] = opt[key];
  }
  if (inDOM && ratio !== 1) {
    canvas.style.width = width + 'px';
    canvas.style.height = height + 'px';
  }
  context.pixelRatio = ratio;
  context.setTransform(ratio, 0, 0, ratio, ratio * origin[0], ratio * origin[1]);
  return canvas;
}

class extension_CanvasRenderer extends extension_Renderer {
  constructor(loader) {
    super(loader);
    this._options = {};
    this._redraw = false;
    this._dirty = new extension_Bounds();
    this._tempb = new extension_Bounds();
  }
  initialize(el, width, height, origin, scaleFactor, options) {
    this._options = options || {};
    this._canvas = this._options.externalContext ? null : extension_domCanvas(1, 1, this._options.type); // instantiate a small canvas

    if (el && this._canvas) {
      extension_domClear(el, 0).appendChild(this._canvas);
      this._canvas.setAttribute('class', 'marks');
    }

    // this method will invoke resize to size the canvas appropriately
    return super.initialize(el, width, height, origin, scaleFactor);
  }
  resize(width, height, origin, scaleFactor) {
    super.resize(width, height, origin, scaleFactor);
    if (this._canvas) {
      // configure canvas size and transform
      extension_resize(this._canvas, this._width, this._height, this._origin, this._scale, this._options.context);
    } else {
      // external context needs to be scaled and positioned to origin
      const ctx = this._options.externalContext;
      if (!ctx) extension_vega_util_module_error('CanvasRenderer is missing a valid canvas or context');
      ctx.scale(this._scale, this._scale);
      ctx.translate(this._origin[0], this._origin[1]);
    }
    this._redraw = true;
    return this;
  }
  canvas() {
    return this._canvas;
  }
  context() {
    return this._options.externalContext || (this._canvas ? this._canvas.getContext('2d') : null);
  }
  dirty(item) {
    const b = this._tempb.clear().union(item.bounds);
    let g = item.mark.group;
    while (g) {
      b.translate(g.x || 0, g.y || 0);
      g = g.mark.group;
    }
    this._dirty.union(b);
  }
  _render(scene, markTypes) {
    const g = this.context(),
      o = this._origin,
      w = this._width,
      h = this._height,
      db = this._dirty,
      vb = extension_viewBounds(o, w, h);

    // setup
    g.save();
    const b = this._redraw || db.empty() ? (this._redraw = false, vb.expand(1)) : extension_clipToBounds(g, vb.intersect(db), o);
    this.clear(-o[0], -o[1], w, h);

    // render
    this.draw(g, scene, b, markTypes);

    // takedown
    g.restore();
    db.clear();
    return this;
  }
  draw(ctx, scene, bounds, markTypes) {
    if (scene.marktype !== 'group' && markTypes != null && !markTypes.includes(scene.marktype)) {
      return;
    }
    const mark = extension_Marks[scene.marktype];
    if (scene.clip) extension_clip(ctx, scene);
    mark.draw.call(this, ctx, scene, bounds, markTypes);
    if (scene.clip) ctx.restore();
  }
  clear(x, y, w, h) {
    const opt = this._options,
      g = this.context();
    if (opt.type !== 'pdf' && !opt.externalContext) {
      // calling clear rect voids vector output in pdf mode
      // and could remove external context content (#2615)
      g.clearRect(x, y, w, h);
    }
    if (this._bgcolor != null) {
      g.fillStyle = this._bgcolor;
      g.fillRect(x, y, w, h);
    }
  }
}
const extension_viewBounds = (origin, width, height) => new extension_Bounds().set(0, 0, width, height).translate(-origin[0], -origin[1]);
function extension_clipToBounds(g, b, origin) {
  // expand bounds by 1 pixel, then round to pixel boundaries
  b.expand(1).round();

  // align to base pixel grid in case of non-integer scaling (#2425)
  if (g.pixelRatio % 1) {
    b.scale(g.pixelRatio).round().scale(1 / g.pixelRatio);
  }

  // to avoid artifacts translate if origin has fractional pixels
  b.translate(-(origin[0] % 1), -(origin[1] % 1));

  // set clip path
  g.beginPath();
  g.rect(b.x1, b.y1, b.width(), b.height());
  g.clip();
  return b;
}

class extension_SVGHandler extends extension_Handler {
  constructor(loader, tooltip) {
    super(loader, tooltip);
    const h = this;
    h._hrefHandler = extension_listener(h, (evt, item) => {
      if (item && item.href) h.handleHref(evt, item, item.href);
    });
    h._tooltipHandler = extension_listener(h, (evt, item) => {
      h.handleTooltip(evt, item, evt.type !== extension_TooltipHideEvent);
    });
  }
  initialize(el, origin, obj) {
    let svg = this._svg;
    if (svg) {
      svg.removeEventListener(extension_HrefEvent, this._hrefHandler);
      svg.removeEventListener(extension_TooltipShowEvent, this._tooltipHandler);
      svg.removeEventListener(extension_TooltipHideEvent, this._tooltipHandler);
    }
    this._svg = svg = el && extension_domFind(el, 'svg');
    if (svg) {
      svg.addEventListener(extension_HrefEvent, this._hrefHandler);
      svg.addEventListener(extension_TooltipShowEvent, this._tooltipHandler);
      svg.addEventListener(extension_TooltipHideEvent, this._tooltipHandler);
    }
    return super.initialize(el, origin, obj);
  }
  canvas() {
    return this._svg;
  }

  // add an event handler
  on(type, handler) {
    const name = this.eventName(type),
      h = this._handlers,
      i = this._handlerIndex(h[name], type, handler);
    if (i < 0) {
      const x = {
        type,
        handler,
        listener: extension_listener(this, handler)
      };
      (h[name] || (h[name] = [])).push(x);
      if (this._svg) {
        this._svg.addEventListener(name, x.listener);
      }
    }
    return this;
  }

  // remove an event handler
  off(type, handler) {
    const name = this.eventName(type),
      h = this._handlers[name],
      i = this._handlerIndex(h, type, handler);
    if (i >= 0) {
      if (this._svg) {
        this._svg.removeEventListener(name, h[i].listener);
      }
      h.splice(i, 1);
    }
    return this;
  }
}

// wrap an event listener for the SVG DOM
const extension_listener = (context, handler) => evt => {
  let item = evt.target.__data__;
  item = Array.isArray(item) ? item[0] : item;
  evt.vegaType = evt.type;
  handler.call(context._obj, evt, item);
};

const extension_ARIA_HIDDEN = 'aria-hidden';
const extension_ARIA_LABEL = 'aria-label';
const extension_ARIA_ROLE = 'role';
const extension_ARIA_ROLEDESCRIPTION = 'aria-roledescription';
const extension_GRAPHICS_OBJECT = 'graphics-object';
const extension_GRAPHICS_SYMBOL = 'graphics-symbol';
const extension_vega_scenegraph_module_bundle = (role, roledesc, label) => ({
  [extension_ARIA_ROLE]: role,
  [extension_ARIA_ROLEDESCRIPTION]: roledesc,
  [extension_ARIA_LABEL]: label || undefined
});

// these roles are covered by related roles
// we can ignore them, no need to generate attributes
const extension_AriaIgnore = extension_toSet(['axis-domain', 'axis-grid', 'axis-label', 'axis-tick', 'axis-title', 'legend-band', 'legend-entry', 'legend-gradient', 'legend-label', 'legend-title', 'legend-symbol', 'title']);

// aria attribute generators for guide roles
const extension_AriaGuides = {
  'axis': {
    desc: 'axis',
    caption: extension_axisCaption
  },
  'legend': {
    desc: 'legend',
    caption: extension_legendCaption
  },
  'title-text': {
    desc: 'title',
    caption: item => `Title text '${extension_titleCaption(item)}'`
  },
  'title-subtitle': {
    desc: 'subtitle',
    caption: item => `Subtitle text '${extension_titleCaption(item)}'`
  }
};

// aria properties generated for mark item encoding channels
const extension_AriaEncode = {
  ariaRole: extension_ARIA_ROLE,
  ariaRoleDescription: extension_ARIA_ROLEDESCRIPTION,
  description: extension_ARIA_LABEL
};
function extension_ariaItemAttributes(emit, item) {
  const hide = item.aria === false;
  emit(extension_ARIA_HIDDEN, hide || undefined);
  if (hide || item.description == null) {
    for (const prop in extension_AriaEncode) {
      emit(extension_AriaEncode[prop], undefined);
    }
  } else {
    const type = item.mark.marktype;
    emit(extension_ARIA_LABEL, item.description);
    emit(extension_ARIA_ROLE, item.ariaRole || (type === 'group' ? extension_GRAPHICS_OBJECT : extension_GRAPHICS_SYMBOL));
    emit(extension_ARIA_ROLEDESCRIPTION, item.ariaRoleDescription || `${type} mark`);
  }
}
function extension_ariaMarkAttributes(mark) {
  return mark.aria === false ? {
    [extension_ARIA_HIDDEN]: true
  } : extension_AriaIgnore[mark.role] ? null : extension_AriaGuides[mark.role] ? extension_ariaGuide(mark, extension_AriaGuides[mark.role]) : extension_ariaMark(mark);
}
function extension_ariaMark(mark) {
  const type = mark.marktype;
  const recurse = type === 'group' || type === 'text' || mark.items.some(_ => _.description != null && _.aria !== false);
  return extension_vega_scenegraph_module_bundle(recurse ? extension_GRAPHICS_OBJECT : extension_GRAPHICS_SYMBOL, `${type} mark container`, mark.description);
}
function extension_ariaGuide(mark, opt) {
  try {
    const item = mark.items[0],
      caption = opt.caption || (() => '');
    return extension_vega_scenegraph_module_bundle(opt.role || extension_GRAPHICS_SYMBOL, opt.desc, item.description || caption(item));
  } catch (err) {
    return null;
  }
}
function extension_titleCaption(item) {
  return extension_vega_util_module_array(item.text).join(' ');
}
function extension_axisCaption(item) {
  const datum = item.datum,
    orient = item.orient,
    title = datum.title ? extension_extractTitle(item) : null,
    ctx = item.context,
    scale = ctx.scales[datum.scale].value,
    locale = ctx.dataflow.locale(),
    type = scale.type,
    xy = orient === 'left' || orient === 'right' ? 'Y' : 'X';
  return `${xy}-axis` + (title ? ` titled '${title}'` : '') + ` for a ${extension_isDiscrete(type) ? 'discrete' : type} scale` + ` with ${extension_domainCaption(locale, scale, item)}`;
}
function extension_legendCaption(item) {
  const datum = item.datum,
    title = datum.title ? extension_extractTitle(item) : null,
    type = `${datum.type || ''} legend`.trim(),
    scales = datum.scales,
    props = Object.keys(scales),
    ctx = item.context,
    scale = ctx.scales[scales[props[0]]].value,
    locale = ctx.dataflow.locale();
  return extension_capitalize(type) + (title ? ` titled '${title}'` : '') + ` for ${extension_channelCaption(props)}` + ` with ${extension_domainCaption(locale, scale, item)}`;
}
function extension_extractTitle(item) {
  try {
    return extension_vega_util_module_array(extension_peek(item.items).items[0].text).join(' ');
  } catch (err) {
    return null;
  }
}
function extension_channelCaption(props) {
  props = props.map(p => p + (p === 'fill' || p === 'stroke' ? ' color' : ''));
  return props.length < 2 ? props[0] : props.slice(0, -1).join(', ') + ' and ' + extension_peek(props);
}
function extension_capitalize(s) {
  return s.length ? s[0].toUpperCase() + s.slice(1) : s;
}

const extension_innerText = val => (val + '').replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
const extension_attrText = val => extension_innerText(val).replace(/"/g, '&quot;').replace(/\t/g, '&#x9;').replace(/\n/g, '&#xA;').replace(/\r/g, '&#xD;');
function extension_markup() {
  let buf = '',
    outer = '',
    inner = '';
  const stack = [],
    clear = () => outer = inner = '',
    push = tag => {
      if (outer) {
        buf += `${outer}>${inner}`;
        clear();
      }
      stack.push(tag);
    },
    attr = (name, value) => {
      if (value != null) outer += ` ${name}="${extension_attrText(value)}"`;
      return m;
    },
    m = {
      open(tag) {
        push(tag);
        outer = '<' + tag;
        for (var _len = arguments.length, attrs = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
          attrs[_key - 1] = arguments[_key];
        }
        for (const set of attrs) {
          for (const key in set) attr(key, set[key]);
        }
        return m;
      },
      close() {
        const tag = stack.pop();
        if (outer) {
          buf += outer + (inner ? `>${inner}</${tag}>` : '/>');
        } else {
          buf += `</${tag}>`;
        }
        clear();
        return m;
      },
      attr,
      text: t => (inner += extension_innerText(t), m),
      toString: () => buf
    };
  return m;
}
const extension_serializeXML = node => src_extension_serialize(extension_markup(), node) + '';
function src_extension_serialize(m, node) {
  m.open(node.tagName);
  if (node.hasAttributes()) {
    const attrs = node.attributes,
      n = attrs.length;
    for (let i = 0; i < n; ++i) {
      m.attr(attrs[i].name, attrs[i].value);
    }
  }
  if (node.hasChildNodes()) {
    const children = node.childNodes;
    for (const child of children) {
      child.nodeType === 3 // text node
      ? m.text(child.nodeValue) : src_extension_serialize(m, child);
    }
  }
  return m.close();
}

const extension_stylesAttr = {
  fill: 'fill',
  fillOpacity: 'fill-opacity',
  stroke: 'stroke',
  strokeOpacity: 'stroke-opacity',
  strokeWidth: 'stroke-width',
  strokeCap: 'stroke-linecap',
  strokeJoin: 'stroke-linejoin',
  strokeDash: 'stroke-dasharray',
  strokeDashOffset: 'stroke-dashoffset',
  strokeMiterLimit: 'stroke-miterlimit',
  opacity: 'opacity'
};
const extension_stylesCss = {
  blend: 'mix-blend-mode'
};

// ensure miter limit default is consistent with canvas (#2498)
const extension_rootAttributes = {
  'fill': 'none',
  'stroke-miterlimit': 10
};

const extension_RootIndex = 0,
  extension_xmlns = 'http://www.w3.org/2000/xmlns/',
  extension_svgns = extension_metadata.xmlns;
class extension_SVGRenderer extends extension_Renderer {
  constructor(loader) {
    super(loader);
    this._dirtyID = 0;
    this._dirty = [];
    this._svg = null;
    this._root = null;
    this._defs = null;
  }

  /**
   * Initialize a new SVGRenderer instance.
   * @param {DOMElement} el - The containing DOM element for the display.
   * @param {number} width - The coordinate width of the display, in pixels.
   * @param {number} height - The coordinate height of the display, in pixels.
   * @param {Array<number>} origin - The origin of the display, in pixels.
   *   The coordinate system will be translated to this point.
   * @param {number} [scaleFactor=1] - Optional scaleFactor by which to multiply
   *   the width and height to determine the final pixel size.
   * @return {SVGRenderer} - This renderer instance.
   */
  initialize(el, width, height, origin, scaleFactor) {
    // create the svg definitions cache
    this._defs = {};
    this._clearDefs();
    if (el) {
      this._svg = extension_domChild(el, 0, 'svg', extension_svgns);
      this._svg.setAttributeNS(extension_xmlns, 'xmlns', extension_svgns);
      this._svg.setAttributeNS(extension_xmlns, 'xmlns:xlink', extension_metadata['xmlns:xlink']);
      this._svg.setAttribute('version', extension_metadata['version']);
      this._svg.setAttribute('class', 'marks');
      extension_domClear(el, 1);

      // set the svg root group
      this._root = extension_domChild(this._svg, extension_RootIndex, 'g', extension_svgns);
      extension_setAttributes(this._root, extension_rootAttributes);

      // ensure no additional child elements
      extension_domClear(this._svg, extension_RootIndex + 1);
    }

    // set background color if defined
    this.background(this._bgcolor);
    return super.initialize(el, width, height, origin, scaleFactor);
  }

  /**
   * Get / set the background color.
   */
  background(bgcolor) {
    if (arguments.length && this._svg) {
      this._svg.style.setProperty('background-color', bgcolor);
    }
    return super.background(...arguments);
  }

  /**
   * Resize the display.
   * @param {number} width - The new coordinate width of the display, in pixels.
   * @param {number} height - The new coordinate height of the display, in pixels.
   * @param {Array<number>} origin - The new origin of the display, in pixels.
   *   The coordinate system will be translated to this point.
   * @param {number} [scaleFactor=1] - Optional scaleFactor by which to multiply
   *   the width and height to determine the final pixel size.
   * @return {SVGRenderer} - This renderer instance;
   */
  resize(width, height, origin, scaleFactor) {
    super.resize(width, height, origin, scaleFactor);
    if (this._svg) {
      extension_setAttributes(this._svg, {
        width: this._width * this._scale,
        height: this._height * this._scale,
        viewBox: `0 0 ${this._width} ${this._height}`
      });
      this._root.setAttribute('transform', `translate(${this._origin})`);
    }
    this._dirty = [];
    return this;
  }

  /**
   * Returns the SVG element of the visualization.
   * @return {DOMElement} - The SVG element.
   */
  canvas() {
    return this._svg;
  }

  /**
   * Returns an SVG text string for the rendered content,
   * or null if this renderer is currently headless.
   */
  svg() {
    const svg = this._svg,
      bg = this._bgcolor;
    if (!svg) return null;
    let node;
    if (bg) {
      svg.removeAttribute('style');
      node = extension_domChild(svg, extension_RootIndex, 'rect', extension_svgns);
      extension_setAttributes(node, {
        width: this._width,
        height: this._height,
        fill: bg
      });
    }
    const text = extension_serializeXML(svg);
    if (bg) {
      svg.removeChild(node);
      this._svg.style.setProperty('background-color', bg);
    }
    return text;
  }

  /**
   * Internal rendering method.
   * @param {object} scene - The root mark of a scenegraph to render.
   * @param {Array} markTypes - Array of the mark types to render.
   *                            If undefined, render all mark types
   */
  _render(scene, markTypes) {
    // perform spot updates and re-render markup
    if (this._dirtyCheck()) {
      if (this._dirtyAll) this._clearDefs();
      this.mark(this._root, scene, undefined, markTypes);
      extension_domClear(this._root, 1);
    }
    this.defs();
    this._dirty = [];
    ++this._dirtyID;
    return this;
  }

  // -- Manage rendering of items marked as dirty --

  /**
   * Flag a mark item as dirty.
   * @param {Item} item - The mark item.
   */
  dirty(item) {
    if (item.dirty !== this._dirtyID) {
      item.dirty = this._dirtyID;
      this._dirty.push(item);
    }
  }

  /**
   * Check if a mark item is considered dirty.
   * @param {Item} item - The mark item.
   */
  isDirty(item) {
    return this._dirtyAll || !item._svg || !item._svg.ownerSVGElement || item.dirty === this._dirtyID;
  }

  /**
   * Internal method to check dirty status and, if possible,
   * make targetted updates without a full rendering pass.
   */
  _dirtyCheck() {
    this._dirtyAll = true;
    const items = this._dirty;
    if (!items.length || !this._dirtyID) return true;
    const id = ++this._dirtyID;
    let item, mark, type, mdef, i, n, o;
    for (i = 0, n = items.length; i < n; ++i) {
      item = items[i];
      mark = item.mark;
      if (mark.marktype !== type) {
        // memoize mark instance lookup
        type = mark.marktype;
        mdef = extension_Marks[type];
      }
      if (mark.zdirty && mark.dirty !== id) {
        this._dirtyAll = false;
        extension_dirtyParents(item, id);
        mark.items.forEach(i => {
          i.dirty = id;
        });
      }
      if (mark.zdirty) continue; // handle in standard drawing pass

      if (item.exit) {
        // EXIT
        if (mdef.nested && mark.items.length) {
          // if nested mark with remaining points, update instead
          o = mark.items[0];
          if (o._svg) this._update(mdef, o._svg, o);
        } else if (item._svg) {
          // otherwise remove from DOM
          o = item._svg.parentNode;
          if (o) o.removeChild(item._svg);
        }
        item._svg = null;
        continue;
      }
      item = mdef.nested ? mark.items[0] : item;
      if (item._update === id) continue; // already visited

      if (!item._svg || !item._svg.ownerSVGElement) {
        // ENTER
        this._dirtyAll = false;
        extension_dirtyParents(item, id);
      } else {
        // IN-PLACE UPDATE
        this._update(mdef, item._svg, item);
      }
      item._update = id;
    }
    return !this._dirtyAll;
  }

  // -- Construct & maintain scenegraph to SVG mapping ---

  /**
   * Render a set of mark items.
   * @param {SVGElement} el - The parent element in the SVG tree.
   * @param {object} scene - The mark parent to render.
   * @param {SVGElement} prev - The previous sibling in the SVG tree.
   * @param {Array} markTypes - Array of the mark types to render.
   *                            If undefined, render all mark types
   */
  mark(el, scene, prev, markTypes) {
    if (!this.isDirty(scene)) {
      return scene._svg;
    }
    const svg = this._svg,
      markType = scene.marktype,
      mdef = extension_Marks[markType],
      events = scene.interactive === false ? 'none' : null,
      isGroup = mdef.tag === 'g';
    const parent = extension_vega_scenegraph_module_bind(scene, el, prev, 'g', svg);
    if (markType !== 'group' && markTypes != null && !markTypes.includes(markType)) {
      extension_domClear(parent, 0);
      return scene._svg;
    }
    parent.setAttribute('class', extension_cssClass(scene));

    // apply aria attributes to parent container element
    const aria = extension_ariaMarkAttributes(scene);
    for (const key in aria) extension_setAttribute(parent, key, aria[key]);
    if (!isGroup) {
      extension_setAttribute(parent, 'pointer-events', events);
    }
    extension_setAttribute(parent, 'clip-path', scene.clip ? extension_clip$1(this, scene, scene.group) : null);
    let sibling = null,
      i = 0;
    const process = item => {
      const dirty = this.isDirty(item),
        node = extension_vega_scenegraph_module_bind(item, parent, sibling, mdef.tag, svg);
      if (dirty) {
        this._update(mdef, node, item);
        if (isGroup) extension_recurse(this, node, item, markTypes);
      }
      sibling = node;
      ++i;
    };
    if (mdef.nested) {
      if (scene.items.length) process(scene.items[0]);
    } else {
      extension_vega_scenegraph_module_visit(scene, process);
    }
    extension_domClear(parent, i);
    return parent;
  }

  /**
   * Update the attributes of an SVG element for a mark item.
   * @param {object} mdef - The mark definition object
   * @param {SVGElement} el - The SVG element.
   * @param {Item} item - The mark item.
   */
  _update(mdef, el, item) {
    // set dom element and values cache
    // provides access to emit method
    extension_vega_scenegraph_module_element = el;
    extension_vega_scenegraph_module_values = el.__values__;

    // apply aria-specific properties
    extension_ariaItemAttributes(extension_emit, item);

    // apply svg attributes
    mdef.attr(extension_emit, item, this);

    // some marks need special treatment
    const extra = extension_mark_extras[mdef.type];
    if (extra) extra.call(this, mdef, el, item);

    // apply svg style attributes
    // note: element state may have been modified by 'extra' method
    if (extension_vega_scenegraph_module_element) this.style(extension_vega_scenegraph_module_element, item);
  }

  /**
   * Update the presentation attributes of an SVG element for a mark item.
   * @param {SVGElement} el - The SVG element.
   * @param {Item} item - The mark item.
   */
  style(el, item) {
    if (item == null) return;
    for (const prop in extension_stylesAttr) {
      let value = prop === 'font' ? extension_fontFamily(item) : item[prop];
      if (value === extension_vega_scenegraph_module_values[prop]) continue;
      const name = extension_stylesAttr[prop];
      if (value == null) {
        el.removeAttribute(name);
      } else {
        if (extension_isGradient(value)) {
          value = extension_gradientRef(value, this._defs.gradient, extension_href());
        }
        el.setAttribute(name, value + '');
      }
      extension_vega_scenegraph_module_values[prop] = value;
    }
    for (const prop in extension_stylesCss) {
      extension_setStyle(el, extension_stylesCss[prop], item[prop]);
    }
  }

  /**
   * Render SVG defs, as needed.
   * Must be called *after* marks have been processed to ensure the
   * collected state is current and accurate.
   */
  defs() {
    const svg = this._svg,
      defs = this._defs;
    let el = defs.el,
      index = 0;
    for (const id in defs.gradient) {
      if (!el) defs.el = el = extension_domChild(svg, extension_RootIndex + 1, 'defs', extension_svgns);
      index = extension_updateGradient(el, defs.gradient[id], index);
    }
    for (const id in defs.clipping) {
      if (!el) defs.el = el = extension_domChild(svg, extension_RootIndex + 1, 'defs', extension_svgns);
      index = extension_updateClipping(el, defs.clipping[id], index);
    }

    // clean-up
    if (el) {
      index === 0 ? (svg.removeChild(el), defs.el = null) : extension_domClear(el, index);
    }
  }

  /**
   * Clear defs caches.
   */
  _clearDefs() {
    const def = this._defs;
    def.gradient = {};
    def.clipping = {};
  }
}

// mark ancestor chain with a dirty id
function extension_dirtyParents(item, id) {
  for (; item && item.dirty !== id; item = item.mark.group) {
    item.dirty = id;
    if (item.mark && item.mark.dirty !== id) {
      item.mark.dirty = id;
    } else return;
  }
}

// update gradient definitions
function extension_updateGradient(el, grad, index) {
  let i, n, stop;
  if (grad.gradient === 'radial') {
    // SVG radial gradients automatically transform to normalized bbox
    // coordinates, in a way that is cumbersome to replicate in canvas.
    // We wrap the radial gradient in a pattern element, allowing us to
    // maintain a circular gradient that matches what canvas provides.
    let pt = extension_domChild(el, index++, 'pattern', extension_svgns);
    extension_setAttributes(pt, {
      id: extension_patternPrefix + grad.id,
      viewBox: '0,0,1,1',
      width: '100%',
      height: '100%',
      preserveAspectRatio: 'xMidYMid slice'
    });
    pt = extension_domChild(pt, 0, 'rect', extension_svgns);
    extension_setAttributes(pt, {
      width: 1,
      height: 1,
      fill: `url(${extension_href()}#${grad.id})`
    });
    el = extension_domChild(el, index++, 'radialGradient', extension_svgns);
    extension_setAttributes(el, {
      id: grad.id,
      fx: grad.x1,
      fy: grad.y1,
      fr: grad.r1,
      cx: grad.x2,
      cy: grad.y2,
      r: grad.r2
    });
  } else {
    el = extension_domChild(el, index++, 'linearGradient', extension_svgns);
    extension_setAttributes(el, {
      id: grad.id,
      x1: grad.x1,
      x2: grad.x2,
      y1: grad.y1,
      y2: grad.y2
    });
  }
  for (i = 0, n = grad.stops.length; i < n; ++i) {
    stop = extension_domChild(el, i, 'stop', extension_svgns);
    stop.setAttribute('offset', grad.stops[i].offset);
    stop.setAttribute('stop-color', grad.stops[i].color);
  }
  extension_domClear(el, i);
  return index;
}

// update clipping path definitions
function extension_updateClipping(el, clip, index) {
  let mask;
  el = extension_domChild(el, index, 'clipPath', extension_svgns);
  el.setAttribute('id', clip.id);
  if (clip.path) {
    mask = extension_domChild(el, 0, 'path', extension_svgns);
    mask.setAttribute('d', clip.path);
  } else {
    mask = extension_domChild(el, 0, 'rect', extension_svgns);
    extension_setAttributes(mask, {
      x: 0,
      y: 0,
      width: clip.width,
      height: clip.height
    });
  }
  extension_domClear(el, 1);
  return index + 1;
}

// Recursively process group contents.
function extension_recurse(renderer, el, group, markTypes) {
  // child 'g' element is second to last among children (path, g, path)
  // other children here are foreground and background path elements
  el = el.lastChild.previousSibling;
  let prev,
    idx = 0;
  extension_vega_scenegraph_module_visit(group, item => {
    prev = renderer.mark(el, item, prev, markTypes);
    ++idx;
  });

  // remove any extraneous DOM elements
  extension_domClear(el, 1 + idx);
}

// Bind a scenegraph item to an SVG DOM element.
// Create new SVG elements as needed.
function extension_vega_scenegraph_module_bind(item, el, sibling, tag, svg) {
  let node = item._svg,
    doc;

  // create a new dom node if needed
  if (!node) {
    doc = el.ownerDocument;
    node = extension_domCreate(doc, tag, extension_svgns);
    item._svg = node;
    if (item.mark) {
      node.__data__ = item;
      node.__values__ = {
        fill: 'default'
      };

      // if group, create background, content, and foreground elements
      if (tag === 'g') {
        const bg = extension_domCreate(doc, 'path', extension_svgns);
        node.appendChild(bg);
        bg.__data__ = item;
        const cg = extension_domCreate(doc, 'g', extension_svgns);
        node.appendChild(cg);
        cg.__data__ = item;
        const fg = extension_domCreate(doc, 'path', extension_svgns);
        node.appendChild(fg);
        fg.__data__ = item;
        fg.__values__ = {
          fill: 'default'
        };
      }
    }
  }

  // (re-)insert if (a) not contained in SVG or (b) sibling order has changed
  if (node.ownerSVGElement !== svg || extension_siblingCheck(node, sibling)) {
    el.insertBefore(node, sibling ? sibling.nextSibling : el.firstChild);
  }
  return node;
}

// check if two nodes are ordered siblings
function extension_siblingCheck(node, sibling) {
  return node.parentNode && node.parentNode.childNodes.length > 1 && node.previousSibling != sibling; // treat null/undefined the same
}

// -- Set attributes & styles on SVG elements ---

let extension_vega_scenegraph_module_element = null,
  // temp var for current SVG element
  extension_vega_scenegraph_module_values = null; // temp var for current values hash

// Extra configuration for certain mark types
const extension_mark_extras = {
  group(mdef, el, item) {
    const fg = extension_vega_scenegraph_module_element = el.childNodes[2];
    extension_vega_scenegraph_module_values = fg.__values__;
    mdef.foreground(extension_emit, item, this);
    extension_vega_scenegraph_module_values = el.__values__; // use parent's values hash
    extension_vega_scenegraph_module_element = el.childNodes[1];
    mdef.content(extension_emit, item, this);
    const bg = extension_vega_scenegraph_module_element = el.childNodes[0];
    mdef.background(extension_emit, item, this);
    const value = item.mark.interactive === false ? 'none' : null;
    if (value !== extension_vega_scenegraph_module_values.events) {
      extension_setAttribute(fg, 'pointer-events', value);
      extension_setAttribute(bg, 'pointer-events', value);
      extension_vega_scenegraph_module_values.events = value;
    }
    if (item.strokeForeground && item.stroke) {
      const fill = item.fill;
      extension_setAttribute(fg, 'display', null);

      // set style of background
      this.style(bg, item);
      extension_setAttribute(bg, 'stroke', null);

      // set style of foreground
      if (fill) item.fill = null;
      extension_vega_scenegraph_module_values = fg.__values__;
      this.style(fg, item);
      if (fill) item.fill = fill;

      // leave element null to prevent downstream styling
      extension_vega_scenegraph_module_element = null;
    } else {
      // ensure foreground is ignored
      extension_setAttribute(fg, 'display', 'none');
    }
  },
  image(mdef, el, item) {
    if (item.smooth === false) {
      extension_setStyle(el, 'image-rendering', 'optimizeSpeed');
      extension_setStyle(el, 'image-rendering', 'pixelated');
    } else {
      extension_setStyle(el, 'image-rendering', null);
    }
  },
  text(mdef, el, item) {
    const tl = extension_textLines(item);
    let key, value, doc, lh;
    if (extension_vega_util_module_isArray(tl)) {
      // multi-line text
      value = tl.map(_ => extension_textValue(item, _));
      key = value.join('\n'); // content cache key

      if (key !== extension_vega_scenegraph_module_values.text) {
        extension_domClear(el, 0);
        doc = el.ownerDocument;
        lh = extension_lineHeight(item);
        value.forEach((t, i) => {
          const ts = extension_domCreate(doc, 'tspan', extension_svgns);
          ts.__data__ = item; // data binding
          ts.textContent = t;
          if (i) {
            ts.setAttribute('x', 0);
            ts.setAttribute('dy', lh);
          }
          el.appendChild(ts);
        });
        extension_vega_scenegraph_module_values.text = key;
      }
    } else {
      // single-line text
      value = extension_textValue(item, tl);
      if (value !== extension_vega_scenegraph_module_values.text) {
        el.textContent = value;
        extension_vega_scenegraph_module_values.text = value;
      }
    }
    extension_setAttribute(el, 'font-family', extension_fontFamily(item));
    extension_setAttribute(el, 'font-size', extension_fontSize(item) + 'px');
    extension_setAttribute(el, 'font-style', item.fontStyle);
    extension_setAttribute(el, 'font-variant', item.fontVariant);
    extension_setAttribute(el, 'font-weight', item.fontWeight);
  }
};
function extension_emit(name, value, ns) {
  // early exit if value is unchanged
  if (value === extension_vega_scenegraph_module_values[name]) return;

  // use appropriate method given namespace (ns)
  if (ns) {
    extension_setAttributeNS(extension_vega_scenegraph_module_element, name, value, ns);
  } else {
    extension_setAttribute(extension_vega_scenegraph_module_element, name, value);
  }

  // note current value for future comparison
  extension_vega_scenegraph_module_values[name] = value;
}
function extension_setStyle(el, name, value) {
  if (value !== extension_vega_scenegraph_module_values[name]) {
    if (value == null) {
      el.style.removeProperty(name);
    } else {
      el.style.setProperty(name, value + '');
    }
    extension_vega_scenegraph_module_values[name] = value;
  }
}
function extension_setAttributes(el, attrs) {
  for (const key in attrs) {
    extension_setAttribute(el, key, attrs[key]);
  }
}
function extension_setAttribute(el, name, value) {
  if (value != null) {
    // if value is provided, update DOM attribute
    el.setAttribute(name, value);
  } else {
    // else remove DOM attribute
    el.removeAttribute(name);
  }
}
function extension_setAttributeNS(el, name, value, ns) {
  if (value != null) {
    // if value is provided, update DOM attribute
    el.setAttributeNS(ns, name, value);
  } else {
    // else remove DOM attribute
    el.removeAttributeNS(ns, name);
  }
}
function extension_href() {
  let loc;
  return typeof window === 'undefined' ? '' : (loc = window.location).hash ? loc.href.slice(0, -loc.hash.length) : loc.href;
}

class extension_SVGStringRenderer extends extension_Renderer {
  constructor(loader) {
    super(loader);
    this._text = null;
    this._defs = {
      gradient: {},
      clipping: {}
    };
  }

  /**
   * Returns the rendered SVG text string,
   * or null if rendering has not yet occurred.
   */
  svg() {
    return this._text;
  }

  /**
   * Internal rendering method.
   * @param {object} scene - The root mark of a scenegraph to render.
   */
  _render(scene) {
    const m = extension_markup();

    // svg tag
    m.open('svg', extension_extend({}, extension_metadata, {
      class: 'marks',
      width: this._width * this._scale,
      height: this._height * this._scale,
      viewBox: `0 0 ${this._width} ${this._height}`
    }));

    // background, if defined
    const bg = this._bgcolor;
    if (bg && bg !== 'transparent' && bg !== 'none') {
      m.open('rect', {
        width: this._width,
        height: this._height,
        fill: bg
      }).close();
    }

    // root content group
    m.open('g', extension_rootAttributes, {
      transform: 'translate(' + this._origin + ')'
    });
    this.mark(m, scene);
    m.close(); // </g>

    // defs
    this.defs(m);

    // get SVG text string
    this._text = m.close() + '';
    return this;
  }

  /**
   * Render a set of mark items.
   * @param {object} m - The markup context.
   * @param {object} scene - The mark parent to render.
   */
  mark(m, scene) {
    const mdef = extension_Marks[scene.marktype],
      tag = mdef.tag,
      attrList = [extension_ariaItemAttributes, mdef.attr];

    // render opening group tag
    m.open('g', {
      'class': extension_cssClass(scene),
      'clip-path': scene.clip ? extension_clip$1(this, scene, scene.group) : null
    }, extension_ariaMarkAttributes(scene), {
      'pointer-events': tag !== 'g' && scene.interactive === false ? 'none' : null
    });

    // render contained elements
    const process = item => {
      const href = this.href(item);
      if (href) m.open('a', href);
      m.open(tag, this.attr(scene, item, attrList, tag !== 'g' ? tag : null));
      if (tag === 'text') {
        const tl = extension_textLines(item);
        if (extension_vega_util_module_isArray(tl)) {
          // multi-line text
          const attrs = {
            x: 0,
            dy: extension_lineHeight(item)
          };
          for (let i = 0; i < tl.length; ++i) {
            m.open('tspan', i ? attrs : null).text(extension_textValue(item, tl[i])).close();
          }
        } else {
          // single-line text
          m.text(extension_textValue(item, tl));
        }
      } else if (tag === 'g') {
        const fore = item.strokeForeground,
          fill = item.fill,
          stroke = item.stroke;
        if (fore && stroke) {
          item.stroke = null;
        }
        m.open('path', this.attr(scene, item, mdef.background, 'bgrect')).close();

        // recurse for group content
        m.open('g', this.attr(scene, item, mdef.content));
        extension_vega_scenegraph_module_visit(item, scene => this.mark(m, scene));
        m.close();
        if (fore && stroke) {
          if (fill) item.fill = null;
          item.stroke = stroke;
          m.open('path', this.attr(scene, item, mdef.foreground, 'bgrect')).close();
          if (fill) item.fill = fill;
        } else {
          m.open('path', this.attr(scene, item, mdef.foreground, 'bgfore')).close();
        }
      }
      m.close(); // </tag>
      if (href) m.close(); // </a>
    };
    if (mdef.nested) {
      if (scene.items && scene.items.length) process(scene.items[0]);
    } else {
      extension_vega_scenegraph_module_visit(scene, process);
    }

    // render closing group tag
    return m.close(); // </g>
  }

  /**
   * Get href attributes for a hyperlinked mark item.
   * @param {Item} item - The mark item.
   */
  href(item) {
    const href = item.href;
    let attr;
    if (href) {
      if (attr = this._hrefs && this._hrefs[href]) {
        return attr;
      } else {
        this.sanitizeURL(href).then(attr => {
          // rewrite to use xlink namespace
          attr['xlink:href'] = attr.href;
          attr.href = null;
          (this._hrefs || (this._hrefs = {}))[href] = attr;
        });
      }
    }
    return null;
  }

  /**
   * Get an object of SVG attributes for a mark item.
   * @param {object} scene - The mark parent.
   * @param {Item} item - The mark item.
   * @param {array|function} attrs - One or more attribute emitters.
   * @param {string} tag - The tag being rendered.
   */
  attr(scene, item, attrs, tag) {
    const object = {},
      emit = (name, value, ns, prefixed) => {
        object[prefixed || name] = value;
      };

    // apply mark specific attributes
    if (Array.isArray(attrs)) {
      attrs.forEach(fn => fn(emit, item, this));
    } else {
      attrs(emit, item, this);
    }

    // apply style attributes
    if (tag) {
      extension_style(object, item, scene, tag, this._defs);
    }
    return object;
  }

  /**
   * Render SVG defs, as needed.
   * Must be called *after* marks have been processed to ensure the
   * collected state is current and accurate.
   * @param {object} m - The markup context.
   */
  defs(m) {
    const gradient = this._defs.gradient,
      clipping = this._defs.clipping,
      count = Object.keys(gradient).length + Object.keys(clipping).length;
    if (count === 0) return; // nothing to do

    m.open('defs');
    for (const id in gradient) {
      const def = gradient[id],
        stops = def.stops;
      if (def.gradient === 'radial') {
        // SVG radial gradients automatically transform to normalized bbox
        // coordinates, in a way that is cumbersome to replicate in canvas.
        // We wrap the radial gradient in a pattern element, allowing us to
        // maintain a circular gradient that matches what canvas provides.

        m.open('pattern', {
          id: extension_patternPrefix + id,
          viewBox: '0,0,1,1',
          width: '100%',
          height: '100%',
          preserveAspectRatio: 'xMidYMid slice'
        });
        m.open('rect', {
          width: '1',
          height: '1',
          fill: 'url(#' + id + ')'
        }).close();
        m.close(); // </pattern>

        m.open('radialGradient', {
          id: id,
          fx: def.x1,
          fy: def.y1,
          fr: def.r1,
          cx: def.x2,
          cy: def.y2,
          r: def.r2
        });
      } else {
        m.open('linearGradient', {
          id: id,
          x1: def.x1,
          x2: def.x2,
          y1: def.y1,
          y2: def.y2
        });
      }
      for (let i = 0; i < stops.length; ++i) {
        m.open('stop', {
          offset: stops[i].offset,
          'stop-color': stops[i].color
        }).close();
      }
      m.close();
    }
    for (const id in clipping) {
      const def = clipping[id];
      m.open('clipPath', {
        id: id
      });
      if (def.path) {
        m.open('path', {
          d: def.path
        }).close();
      } else {
        m.open('rect', {
          x: 0,
          y: 0,
          width: def.width,
          height: def.height
        }).close();
      }
      m.close();
    }
    m.close();
  }
}

// Helper function for attr for style presentation attributes
function extension_style(s, item, scene, tag, defs) {
  let styleList;
  if (item == null) return s;
  if (tag === 'bgrect' && scene.interactive === false) {
    s['pointer-events'] = 'none';
  }
  if (tag === 'bgfore') {
    if (scene.interactive === false) {
      s['pointer-events'] = 'none';
    }
    s.display = 'none';
    if (item.fill !== null) return s;
  }
  if (tag === 'image' && item.smooth === false) {
    styleList = ['image-rendering: optimizeSpeed;', 'image-rendering: pixelated;'];
  }
  if (tag === 'text') {
    s['font-family'] = extension_fontFamily(item);
    s['font-size'] = extension_fontSize(item) + 'px';
    s['font-style'] = item.fontStyle;
    s['font-variant'] = item.fontVariant;
    s['font-weight'] = item.fontWeight;
  }
  for (const prop in extension_stylesAttr) {
    let value = item[prop];
    const name = extension_stylesAttr[prop];
    if (value === 'transparent' && (name === 'fill' || name === 'stroke')) ; else if (value != null) {
      if (extension_isGradient(value)) {
        value = extension_gradientRef(value, defs.gradient, '');
      }
      s[name] = value;
    }
  }
  for (const prop in extension_stylesCss) {
    const value = item[prop];
    if (value != null) {
      styleList = styleList || [];
      styleList.push(`${extension_stylesCss[prop]}: ${value};`);
    }
  }
  if (styleList) {
    s.style = styleList.join(' ');
  }
  return s;
}

/**
 * @typedef {Object} HybridRendererOptions
 *
 * @property {string[]} [svgMarkTypes=['text']] - An array of SVG mark types to render
 *                                                in the SVG layer. All other mark types
 *                                                will be rendered in the Canvas layer.
 * @property {boolean} [svgOnTop=true] - Flag to determine if SVG should be rendered on top.
 * @property {boolean} [debug=false] - Flag to enable or disable debugging mode. When true,
 *                                     the top layer will be stacked below the bottom layer
 *                                     rather than overlaid on top.
 */

/** @type {HybridRendererOptions} */
const extension_OPTS = {
  svgMarkTypes: ['text'],
  svgOnTop: true,
  debug: false
};

/**
 * Configure the HybridRenderer
 *
 * @param {HybridRendererOptions} options - HybridRenderer configuration options.
 */
function extension_setHybridRendererOptions(options) {
  extension_OPTS['svgMarkTypes'] = options.svgMarkTypes ?? ['text'];
  extension_OPTS['svgOnTop'] = options.svgOnTop ?? true;
  extension_OPTS['debug'] = options.debug ?? false;
}
class extension_HybridRenderer extends extension_Renderer {
  constructor(loader) {
    super(loader);
    this._svgRenderer = new extension_SVGRenderer(loader);
    this._canvasRenderer = new extension_CanvasRenderer(loader);
  }

  /**
   * Initialize a new HybridRenderer instance.
   * @param {DOMElement} el - The containing DOM element for the display.
   * @param {number} width - The coordinate width of the display, in pixels.
   * @param {number} height - The coordinate height of the display, in pixels.
   * @param {Array<number>} origin - The origin of the display, in pixels.
   *   The coordinate system will be translated to this point.
   * @param {number} [scaleFactor=1] - Optional scaleFactor by which to multiply
   *   the width and height to determine the final pixel size.
   * @return {HybridRenderer} - This renderer instance.
   */
  initialize(el, width, height, origin, scaleFactor) {
    this._root_el = extension_domChild(el, 0, 'div');
    const bottomEl = extension_domChild(this._root_el, 0, 'div');
    const topEl = extension_domChild(this._root_el, 1, 'div');
    this._root_el.style.position = 'relative';

    // Set position absolute to overlay svg on top of canvas
    if (!extension_OPTS.debug) {
      bottomEl.style.height = '100%';
      topEl.style.position = 'absolute';
      topEl.style.top = '0';
      topEl.style.left = '0';
      topEl.style.height = '100%';
      topEl.style.width = '100%';
    }
    this._svgEl = extension_OPTS.svgOnTop ? topEl : bottomEl;
    this._canvasEl = extension_OPTS.svgOnTop ? bottomEl : topEl;

    // pointer-events to none on SVG layer so that canvas gets all events
    this._svgEl.style.pointerEvents = 'none';
    this._canvasRenderer.initialize(this._canvasEl, width, height, origin, scaleFactor);
    this._svgRenderer.initialize(this._svgEl, width, height, origin, scaleFactor);
    return super.initialize(el, width, height, origin, scaleFactor);
  }

  /**
   * Flag a mark item as dirty.
   * @param {Item} item - The mark item.
   */
  dirty(item) {
    if (extension_OPTS.svgMarkTypes.includes(item.mark.marktype)) {
      this._svgRenderer.dirty(item);
    } else {
      this._canvasRenderer.dirty(item);
    }
    return this;
  }

  /**
   * Internal rendering method.
   * @param {object} scene - The root mark of a scenegraph to render.
   * @param {Array} markTypes - Array of the mark types to render.
   *                            If undefined, render all mark types
   */
  _render(scene, markTypes) {
    const allMarkTypes = markTypes ?? ['arc', 'area', 'image', 'line', 'path', 'rect', 'rule', 'shape', 'symbol', 'text', 'trail'];
    const canvasMarkTypes = allMarkTypes.filter(m => !extension_OPTS.svgMarkTypes.includes(m));
    this._svgRenderer.render(scene, extension_OPTS.svgMarkTypes);
    this._canvasRenderer.render(scene, canvasMarkTypes);
  }

  /**
   * Resize the display.
   * @param {number} width - The new coordinate width of the display, in pixels.
   * @param {number} height - The new coordinate height of the display, in pixels.
   * @param {Array<number>} origin - The new origin of the display, in pixels.
   *   The coordinate system will be translated to this point.
   * @param {number} [scaleFactor=1] - Optional scaleFactor by which to multiply
   *   the width and height to determine the final pixel size.
   * @return {SVGRenderer} - This renderer instance;
   */
  resize(width, height, origin, scaleFactor) {
    super.resize(width, height, origin, scaleFactor);
    this._svgRenderer.resize(width, height, origin, scaleFactor);
    this._canvasRenderer.resize(width, height, origin, scaleFactor);
    return this;
  }
  background(bgcolor) {
    // Propagate background color to lower canvas renderer
    if (extension_OPTS.svgOnTop) {
      this._canvasRenderer.background(bgcolor);
    } else {
      this._svgRenderer.background(bgcolor);
    }
    return this;
  }
}

class extension_HybridHandler extends extension_CanvasHandler {
  constructor(loader, tooltip) {
    super(loader, tooltip);
  }
  initialize(el, origin, obj) {
    const canvas = extension_domChild(extension_domChild(el, 0, 'div'), extension_OPTS.svgOnTop ? 0 : 1, 'div');
    return super.initialize(canvas, origin, obj);
  }
}

const extension_Canvas = 'canvas';
const extension_Hybrid = 'hybrid';
const extension_PNG = 'png';
const extension_SVG = 'svg';
const extension_vega_scenegraph_module_None = 'none';
const extension_RenderType = {
  Canvas: extension_Canvas,
  PNG: extension_PNG,
  SVG: extension_SVG,
  Hybrid: extension_Hybrid,
  None: extension_vega_scenegraph_module_None
};
const extension_modules = {};
extension_modules[extension_Canvas] = extension_modules[extension_PNG] = {
  renderer: extension_CanvasRenderer,
  headless: extension_CanvasRenderer,
  handler: extension_CanvasHandler
};
extension_modules[extension_SVG] = {
  renderer: extension_SVGRenderer,
  headless: extension_SVGStringRenderer,
  handler: extension_SVGHandler
};
extension_modules[extension_Hybrid] = {
  renderer: extension_HybridRenderer,
  headless: extension_HybridRenderer,
  handler: extension_HybridHandler
};
extension_modules[extension_vega_scenegraph_module_None] = {};
function extension_renderModule(name, _) {
  name = String(name || '').toLowerCase();
  if (arguments.length > 1) {
    extension_modules[name] = _;
    return this;
  } else {
    return extension_modules[name];
  }
}

function extension_vega_scenegraph_module_intersect(scene, bounds, filter) {
  const hits = [],
    // intersection results
    box = new extension_Bounds().union(bounds),
    // defensive copy
    type = scene.marktype;
  return type ? extension_intersectMark(scene, box, filter, hits) : type === 'group' ? extension_intersectGroup(scene, box, filter, hits) : extension_vega_util_module_error('Intersect scene must be mark node or group item.');
}
function extension_intersectMark(mark, box, filter, hits) {
  if (extension_visitMark(mark, box, filter)) {
    const items = mark.items,
      type = mark.marktype,
      n = items.length;
    let i = 0;
    if (type === 'group') {
      for (; i < n; ++i) {
        extension_intersectGroup(items[i], box, filter, hits);
      }
    } else {
      for (const test = extension_Marks[type].isect; i < n; ++i) {
        const item = items[i];
        if (extension_intersectItem(item, box, test)) hits.push(item);
      }
    }
  }
  return hits;
}
function extension_visitMark(mark, box, filter) {
  // process if bounds intersect and if
  // (1) mark is a group mark (so we must recurse), or
  // (2) mark is interactive and passes filter
  return mark.bounds && box.intersects(mark.bounds) && (mark.marktype === 'group' || mark.interactive !== false && (!filter || filter(mark)));
}
function extension_intersectGroup(group, box, filter, hits) {
  // test intersect against group
  // skip groups by default unless filter says otherwise
  if (filter && filter(group.mark) && extension_intersectItem(group, box, extension_Marks.group.isect)) {
    hits.push(group);
  }

  // recursively test children marks
  // translate box to group coordinate space
  const marks = group.items,
    n = marks && marks.length;
  if (n) {
    const x = group.x || 0,
      y = group.y || 0;
    box.translate(-x, -y);
    for (let i = 0; i < n; ++i) {
      extension_intersectMark(marks[i], box, filter, hits);
    }
    box.translate(x, y);
  }
  return hits;
}
function extension_intersectItem(item, box, test) {
  // test bounds enclosure, bounds intersection, then detailed test
  const bounds = item.bounds;
  return box.encloses(bounds) || box.intersects(bounds) && test(item, box);
}

const extension_clipBounds = new extension_Bounds();
function extension_boundClip (mark) {
  const clip = mark.clip;
  if (extension_vega_util_module_isFunction(clip)) {
    clip(extension_boundContext(extension_clipBounds.clear()));
  } else if (clip) {
    extension_clipBounds.set(0, 0, mark.group.width, mark.group.height);
  } else return;
  mark.bounds.intersect(extension_clipBounds);
}

const extension_TOLERANCE = 1e-9;
function extension_sceneEqual(a, b, key) {
  return a === b ? true : key === 'path' ? extension_pathEqual(a, b) : a instanceof Date && b instanceof Date ? +a === +b : extension_vega_util_module_isNumber(a) && extension_vega_util_module_isNumber(b) ? Math.abs(a - b) <= extension_TOLERANCE : !a || !b || !extension_vega_util_module_isObject(a) && !extension_vega_util_module_isObject(b) ? a == b : extension_objectEqual(a, b);
}
function extension_pathEqual(a, b) {
  return extension_sceneEqual(extension_vega_scenegraph_module_parse(a), extension_vega_scenegraph_module_parse(b));
}
function extension_objectEqual(a, b) {
  var ka = Object.keys(a),
    kb = Object.keys(b),
    key,
    i;
  if (ka.length !== kb.length) return false;
  ka.sort();
  kb.sort();
  for (i = ka.length - 1; i >= 0; i--) {
    if (ka[i] != kb[i]) return false;
  }
  for (i = ka.length - 1; i >= 0; i--) {
    key = ka[i];
    if (!extension_sceneEqual(a[key], b[key], key)) return false;
  }
  return typeof a === typeof b;
}

function extension_resetSVGDefIds() {
  extension_resetSVGClipId();
  extension_resetSVGGradientId();
}



;// ../../node_modules/vega-view-transforms/build/vega-view-transforms.module.js




const extension_Top = 'top';
const extension_Left = 'left';
const extension_Right = 'right';
const extension_Bottom = 'bottom';
const extension_TopLeft = 'top-left';
const extension_TopRight = 'top-right';
const extension_BottomLeft = 'bottom-left';
const extension_BottomRight = 'bottom-right';
const extension_Start = 'start';
const extension_Middle = 'middle';
const extension_End = 'end';
const extension_X = 'x';
const extension_Y = 'y';
const extension_Group = 'group';
const extension_AxisRole = 'axis';
const extension_TitleRole = 'title';
const extension_FrameRole = 'frame';
const extension_ScopeRole = 'scope';
const extension_LegendRole = 'legend';
const extension_RowHeader = 'row-header';
const extension_RowFooter = 'row-footer';
const extension_RowTitle = 'row-title';
const extension_ColHeader = 'column-header';
const extension_ColFooter = 'column-footer';
const extension_ColTitle = 'column-title';
const extension_Padding = 'padding';
const extension_Symbols = 'symbol';
const extension_Fit = 'fit';
const extension_FitX = 'fit-x';
const extension_FitY = 'fit-y';
const extension_Pad = 'pad';
const extension_vega_view_transforms_module_None = 'none';
const extension_All = 'all';
const extension_Each = 'each';
const extension_Flush = 'flush';
const extension_vega_view_transforms_module_Column = 'column';
const extension_vega_view_transforms_module_Row = 'row';

/**
 * Calculate bounding boxes for scenegraph items.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {object} params.mark - The scenegraph mark instance to bound.
 */
function extension_Bound(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_Bound, extension_Transform, {
  transform(_, pulse) {
    const view = pulse.dataflow,
      mark = _.mark,
      type = mark.marktype,
      entry = extension_Marks[type],
      bound = entry.bound;
    let markBounds = mark.bounds,
      rebound;
    if (entry.nested) {
      // multi-item marks have a single bounds instance
      if (mark.items.length) view.dirty(mark.items[0]);
      markBounds = extension_vega_view_transforms_module_boundItem(mark, bound);
      mark.items.forEach(item => {
        item.bounds.clear().union(markBounds);
      });
    } else if (type === extension_Group || _.modified()) {
      // operator parameters modified -> re-bound all items
      // updates group bounds in response to modified group content
      pulse.visit(pulse.MOD, item => view.dirty(item));
      markBounds.clear();
      mark.items.forEach(item => markBounds.union(extension_vega_view_transforms_module_boundItem(item, bound)));

      // force reflow for axes/legends/titles to propagate any layout changes
      switch (mark.role) {
        case extension_AxisRole:
        case extension_LegendRole:
        case extension_TitleRole:
          pulse.reflow();
      }
    } else {
      // incrementally update bounds, re-bound mark as needed
      rebound = pulse.changed(pulse.REM);
      pulse.visit(pulse.ADD, item => {
        markBounds.union(extension_vega_view_transforms_module_boundItem(item, bound));
      });
      pulse.visit(pulse.MOD, item => {
        rebound = rebound || markBounds.alignsWith(item.bounds);
        view.dirty(item);
        markBounds.union(extension_vega_view_transforms_module_boundItem(item, bound));
      });
      if (rebound) {
        markBounds.clear();
        mark.items.forEach(item => markBounds.union(item.bounds));
      }
    }

    // ensure mark bounds do not exceed any clipping region
    extension_boundClip(mark);
    return pulse.modifies('bounds');
  }
});
function extension_vega_view_transforms_module_boundItem(item, bound, opt) {
  return bound(item.bounds.clear(), item, opt);
}

const extension_COUNTER_NAME = ':vega_identifier:';

/**
 * Adds a unique identifier to all added tuples.
 * This transform creates a new signal that serves as an id counter.
 * As a result, the id counter is shared across all instances of this
 * transform, generating unique ids across multiple data streams. In
 * addition, this signal value can be included in a snapshot of the
 * dataflow state, enabling correct resumption of id allocation.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {string} params.as - The field name for the generated identifier.
 */
function extension_vega_view_transforms_module_Identifier(params) {
  extension_Transform.call(this, 0, params);
}
extension_vega_view_transforms_module_Identifier.Definition = {
  'type': 'Identifier',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'as',
    'type': 'string',
    'required': true
  }]
};
extension_inherits(extension_vega_view_transforms_module_Identifier, extension_Transform, {
  transform(_, pulse) {
    const counter = extension_getCounter(pulse.dataflow),
      as = _.as;
    let id = counter.value;
    pulse.visit(pulse.ADD, t => t[as] = t[as] || ++id);
    counter.set(this.value = id);
    return pulse;
  }
});
function extension_getCounter(view) {
  return view._signals[extension_COUNTER_NAME] || (view._signals[extension_COUNTER_NAME] = view.add(0));
}

/**
 * Bind scenegraph items to a scenegraph mark instance.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {object} params.markdef - The mark definition for creating the mark.
 *   This is an object of legal scenegraph mark properties which *must* include
 *   the 'marktype' property.
 */
function extension_Mark(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_Mark, extension_Transform, {
  transform(_, pulse) {
    let mark = this.value;

    // acquire mark on first invocation, bind context and group
    if (!mark) {
      mark = pulse.dataflow.scenegraph().mark(_.markdef, extension_lookup$1(_), _.index);
      mark.group.context = _.context;
      if (!_.context.group) _.context.group = mark.group;
      mark.source = this.source; // point to upstream collector
      mark.clip = _.clip;
      mark.interactive = _.interactive;
      this.value = mark;
    }

    // initialize entering items
    const Init = mark.marktype === extension_Group ? extension_GroupItem : extension_Item;
    pulse.visit(pulse.ADD, item => Init.call(item, mark));

    // update clipping and/or interactive status
    if (_.modified('clip') || _.modified('interactive')) {
      mark.clip = _.clip;
      mark.interactive = !!_.interactive;
      mark.zdirty = true; // force scenegraph re-eval
      pulse.reflow();
    }

    // bind items array to scenegraph mark
    mark.items = pulse.source;
    return pulse;
  }
});
function extension_lookup$1(_) {
  const g = _.groups,
    p = _.parent;
  return g && g.size === 1 ? g.get(Object.keys(g.object)[0]) : g && p ? g.lookup(p) : null;
}

/**
 * Analyze items for overlap, changing opacity to hide items with
 * overlapping bounding boxes. This transform will preserve at least
 * two items (e.g., first and last) even if overlap persists.
 * @param {object} params - The parameters for this operator.
 * @param {function(*,*): number} [params.sort] - A comparator
 *   function for sorting items.
 * @param {object} [params.method] - The overlap removal method to apply.
 *   One of 'parity' (default, hide every other item until there is no
 *   more overlap) or 'greedy' (sequentially scan and hide and items that
 *   overlap with the last visible item).
 * @param {object} [params.boundScale] - A scale whose range should be used
 *   to bound the items. Items exceeding the bounds of the scale range
 *   will be treated as overlapping. If null or undefined, no bounds check
 *   will be applied.
 * @param {object} [params.boundOrient] - The orientation of the scale
 *   (top, bottom, left, or right) used to bound items. This parameter is
 *   ignored if boundScale is null or undefined.
 * @param {object} [params.boundTolerance] - The tolerance in pixels for
 *   bound inclusion testing (default 1). This specifies by how many pixels
 *   an item's bounds may exceed the scale range bounds and not be culled.
 * @constructor
 */
function extension_Overlap(params) {
  extension_Transform.call(this, null, params);
}
const extension_methods = {
  parity: items => items.filter((item, i) => i % 2 ? item.opacity = 0 : 1),
  greedy: (items, sep) => {
    let a;
    return items.filter((b, i) => !i || !extension_vega_view_transforms_module_intersect(a.bounds, b.bounds, sep) ? (a = b, 1) : b.opacity = 0);
  }
};

// compute bounding box intersection
// including padding pixels of separation
const extension_vega_view_transforms_module_intersect = (a, b, sep) => sep > Math.max(b.x1 - a.x2, a.x1 - b.x2, b.y1 - a.y2, a.y1 - b.y2);
const extension_hasOverlap = (items, pad) => {
  for (var i = 1, n = items.length, a = items[0].bounds, b; i < n; a = b, ++i) {
    if (extension_vega_view_transforms_module_intersect(a, b = items[i].bounds, pad)) return true;
  }
};
const extension_hasBounds = item => {
  const b = item.bounds;
  return b.width() > 1 && b.height() > 1;
};
const extension_boundTest = (scale, orient, tolerance) => {
  var range = scale.range(),
    b = new extension_Bounds();
  if (orient === extension_Top || orient === extension_Bottom) {
    b.set(range[0], -Infinity, range[1], +Infinity);
  } else {
    b.set(-Infinity, range[0], +Infinity, range[1]);
  }
  b.expand(tolerance || 1);
  return item => b.encloses(item.bounds);
};

// reset all items to be fully opaque
const extension_vega_view_transforms_module_reset = source => {
  source.forEach(item => item.opacity = 1);
  return source;
};

// add all tuples to mod, fork pulse if parameters were modified
// fork prevents cross-stream tuple pollution (e.g., pulse from scale)
const extension_reflow = (pulse, _) => pulse.reflow(_.modified()).modifies('opacity');
extension_inherits(extension_Overlap, extension_Transform, {
  transform(_, pulse) {
    const reduce = extension_methods[_.method] || extension_methods.parity,
      sep = _.separation || 0;
    let source = pulse.materialize(pulse.SOURCE).source,
      items,
      test;
    if (!source || !source.length) return;
    if (!_.method) {
      // early exit if method is falsy
      if (_.modified('method')) {
        extension_vega_view_transforms_module_reset(source);
        pulse = extension_reflow(pulse, _);
      }
      return pulse;
    }

    // skip labels with no content
    source = source.filter(extension_hasBounds);

    // early exit, nothing to do
    if (!source.length) return;
    if (_.sort) {
      source = source.slice().sort(_.sort);
    }
    items = extension_vega_view_transforms_module_reset(source);
    pulse = extension_reflow(pulse, _);
    if (items.length >= 3 && extension_hasOverlap(items, sep)) {
      do {
        items = reduce(items, sep);
      } while (items.length >= 3 && extension_hasOverlap(items, sep));
      if (items.length < 3 && !extension_peek(source).opacity) {
        if (items.length > 1) extension_peek(items).opacity = 0;
        extension_peek(source).opacity = 1;
      }
    }
    if (_.boundScale && _.boundTolerance >= 0) {
      test = extension_boundTest(_.boundScale, _.boundOrient, +_.boundTolerance);
      source.forEach(item => {
        if (!test(item)) item.opacity = 0;
      });
    }

    // re-calculate mark bounds
    const bounds = items[0].mark.bounds.clear();
    source.forEach(item => {
      if (item.opacity) bounds.union(item.bounds);
    });
    return pulse;
  }
});

/**
 * Queue modified scenegraph items for rendering.
 * @constructor
 */
function extension_Render(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_Render, extension_Transform, {
  transform(_, pulse) {
    const view = pulse.dataflow;
    pulse.visit(pulse.ALL, item => view.dirty(item));

    // set z-index dirty flag as needed
    if (pulse.fields && pulse.fields['zindex']) {
      const item = pulse.source && pulse.source[0];
      if (item) item.mark.zdirty = true;
    }
  }
});

const extension_vega_view_transforms_module_tempBounds = new extension_Bounds();
function extension_vega_view_transforms_module_set(item, property, value) {
  return item[property] === value ? 0 : (item[property] = value, 1);
}

function extension_isYAxis(mark) {
  var orient = mark.items[0].orient;
  return orient === extension_Left || orient === extension_Right;
}
function extension_axisIndices(datum) {
  let index = +datum.grid;
  return [datum.ticks ? index++ : -1,
  // ticks index
  datum.labels ? index++ : -1,
  // labels index
  index + +datum.domain // title index
  ];
}
function extension_axisLayout(view, axis, width, height) {
  var item = axis.items[0],
    datum = item.datum,
    delta = item.translate != null ? item.translate : 0.5,
    orient = item.orient,
    indices = extension_axisIndices(datum),
    range = item.range,
    offset = item.offset,
    position = item.position,
    minExtent = item.minExtent,
    maxExtent = item.maxExtent,
    title = datum.title && item.items[indices[2]].items[0],
    titlePadding = item.titlePadding,
    bounds = item.bounds,
    dl = title && extension_multiLineOffset(title),
    x = 0,
    y = 0,
    i,
    s;
  extension_vega_view_transforms_module_tempBounds.clear().union(bounds);
  bounds.clear();
  if ((i = indices[0]) > -1) bounds.union(item.items[i].bounds);
  if ((i = indices[1]) > -1) bounds.union(item.items[i].bounds);

  // position axis group and title
  switch (orient) {
    case extension_Top:
      x = position || 0;
      y = -offset;
      s = Math.max(minExtent, Math.min(maxExtent, -bounds.y1));
      bounds.add(0, -s).add(range, 0);
      if (title) extension_axisTitleLayout(view, title, s, titlePadding, dl, 0, -1, bounds);
      break;
    case extension_Left:
      x = -offset;
      y = position || 0;
      s = Math.max(minExtent, Math.min(maxExtent, -bounds.x1));
      bounds.add(-s, 0).add(0, range);
      if (title) extension_axisTitleLayout(view, title, s, titlePadding, dl, 1, -1, bounds);
      break;
    case extension_Right:
      x = width + offset;
      y = position || 0;
      s = Math.max(minExtent, Math.min(maxExtent, bounds.x2));
      bounds.add(0, 0).add(s, range);
      if (title) extension_axisTitleLayout(view, title, s, titlePadding, dl, 1, 1, bounds);
      break;
    case extension_Bottom:
      x = position || 0;
      y = height + offset;
      s = Math.max(minExtent, Math.min(maxExtent, bounds.y2));
      bounds.add(0, 0).add(range, s);
      if (title) extension_axisTitleLayout(view, title, s, titlePadding, 0, 0, 1, bounds);
      break;
    default:
      x = item.x;
      y = item.y;
  }

  // update bounds
  extension_boundStroke(bounds.translate(x, y), item);
  if (extension_vega_view_transforms_module_set(item, 'x', x + delta) | extension_vega_view_transforms_module_set(item, 'y', y + delta)) {
    item.bounds = extension_vega_view_transforms_module_tempBounds;
    view.dirty(item);
    item.bounds = bounds;
    view.dirty(item);
  }
  return item.mark.bounds.clear().union(bounds);
}
function extension_axisTitleLayout(view, title, offset, pad, dl, isYAxis, sign, bounds) {
  const b = title.bounds;
  if (title.auto) {
    const v = sign * (offset + dl + pad);
    let dx = 0,
      dy = 0;
    view.dirty(title);
    isYAxis ? dx = (title.x || 0) - (title.x = v) : dy = (title.y || 0) - (title.y = v);
    title.mark.bounds.clear().union(b.translate(-dx, -dy));
    view.dirty(title);
  }
  bounds.union(b);
}

// aggregation functions for grid margin determination
const extension_vega_view_transforms_module_min = (a, b) => Math.floor(Math.min(a, b));
const extension_vega_view_transforms_module_max = (a, b) => Math.ceil(Math.max(a, b));
function extension_gridLayoutGroups(group) {
  var groups = group.items,
    n = groups.length,
    i = 0,
    mark,
    items;
  const views = {
    marks: [],
    rowheaders: [],
    rowfooters: [],
    colheaders: [],
    colfooters: [],
    rowtitle: null,
    coltitle: null
  };

  // layout axes, gather legends, collect bounds
  for (; i < n; ++i) {
    mark = groups[i];
    items = mark.items;
    if (mark.marktype === extension_Group) {
      switch (mark.role) {
        case extension_AxisRole:
        case extension_LegendRole:
        case extension_TitleRole:
          break;
        case extension_RowHeader:
          views.rowheaders.push(...items);
          break;
        case extension_RowFooter:
          views.rowfooters.push(...items);
          break;
        case extension_ColHeader:
          views.colheaders.push(...items);
          break;
        case extension_ColFooter:
          views.colfooters.push(...items);
          break;
        case extension_RowTitle:
          views.rowtitle = items[0];
          break;
        case extension_ColTitle:
          views.coltitle = items[0];
          break;
        default:
          views.marks.push(...items);
      }
    }
  }
  return views;
}
function extension_bboxFlush(item) {
  return new extension_Bounds().set(0, 0, item.width || 0, item.height || 0);
}
function extension_bboxFull(item) {
  const b = item.bounds.clone();
  return b.empty() ? b.set(0, 0, 0, 0) : b.translate(-(item.x || 0), -(item.y || 0));
}
function extension_vega_view_transforms_module_get(opt, key, d) {
  const v = extension_vega_util_module_isObject(opt) ? opt[key] : opt;
  return v != null ? v : d !== undefined ? d : 0;
}
function extension_offsetValue(v) {
  return v < 0 ? Math.ceil(-v) : 0;
}
function extension_gridLayout(view, groups, opt) {
  var dirty = !opt.nodirty,
    bbox = opt.bounds === extension_Flush ? extension_bboxFlush : extension_bboxFull,
    bounds = extension_vega_view_transforms_module_tempBounds.set(0, 0, 0, 0),
    alignCol = extension_vega_view_transforms_module_get(opt.align, extension_vega_view_transforms_module_Column),
    alignRow = extension_vega_view_transforms_module_get(opt.align, extension_vega_view_transforms_module_Row),
    padCol = extension_vega_view_transforms_module_get(opt.padding, extension_vega_view_transforms_module_Column),
    padRow = extension_vega_view_transforms_module_get(opt.padding, extension_vega_view_transforms_module_Row),
    ncols = opt.columns || groups.length,
    nrows = ncols <= 0 ? 1 : Math.ceil(groups.length / ncols),
    n = groups.length,
    xOffset = Array(n),
    xExtent = Array(ncols),
    xMax = 0,
    yOffset = Array(n),
    yExtent = Array(nrows),
    yMax = 0,
    dx = Array(n),
    dy = Array(n),
    boxes = Array(n),
    m,
    i,
    c,
    r,
    b,
    g,
    px,
    py,
    x,
    y,
    offset;
  for (i = 0; i < ncols; ++i) xExtent[i] = 0;
  for (i = 0; i < nrows; ++i) yExtent[i] = 0;

  // determine offsets for each group
  for (i = 0; i < n; ++i) {
    g = groups[i];
    b = boxes[i] = bbox(g);
    g.x = g.x || 0;
    dx[i] = 0;
    g.y = g.y || 0;
    dy[i] = 0;
    c = i % ncols;
    r = ~~(i / ncols);
    xMax = Math.max(xMax, px = Math.ceil(b.x2));
    yMax = Math.max(yMax, py = Math.ceil(b.y2));
    xExtent[c] = Math.max(xExtent[c], px);
    yExtent[r] = Math.max(yExtent[r], py);
    xOffset[i] = padCol + extension_offsetValue(b.x1);
    yOffset[i] = padRow + extension_offsetValue(b.y1);
    if (dirty) view.dirty(groups[i]);
  }

  // set initial alignment offsets
  for (i = 0; i < n; ++i) {
    if (i % ncols === 0) xOffset[i] = 0;
    if (i < ncols) yOffset[i] = 0;
  }

  // enforce column alignment constraints
  if (alignCol === extension_Each) {
    for (c = 1; c < ncols; ++c) {
      for (offset = 0, i = c; i < n; i += ncols) {
        if (offset < xOffset[i]) offset = xOffset[i];
      }
      for (i = c; i < n; i += ncols) {
        xOffset[i] = offset + xExtent[c - 1];
      }
    }
  } else if (alignCol === extension_All) {
    for (offset = 0, i = 0; i < n; ++i) {
      if (i % ncols && offset < xOffset[i]) offset = xOffset[i];
    }
    for (i = 0; i < n; ++i) {
      if (i % ncols) xOffset[i] = offset + xMax;
    }
  } else {
    for (alignCol = false, c = 1; c < ncols; ++c) {
      for (i = c; i < n; i += ncols) {
        xOffset[i] += xExtent[c - 1];
      }
    }
  }

  // enforce row alignment constraints
  if (alignRow === extension_Each) {
    for (r = 1; r < nrows; ++r) {
      for (offset = 0, i = r * ncols, m = i + ncols; i < m; ++i) {
        if (offset < yOffset[i]) offset = yOffset[i];
      }
      for (i = r * ncols; i < m; ++i) {
        yOffset[i] = offset + yExtent[r - 1];
      }
    }
  } else if (alignRow === extension_All) {
    for (offset = 0, i = ncols; i < n; ++i) {
      if (offset < yOffset[i]) offset = yOffset[i];
    }
    for (i = ncols; i < n; ++i) {
      yOffset[i] = offset + yMax;
    }
  } else {
    for (alignRow = false, r = 1; r < nrows; ++r) {
      for (i = r * ncols, m = i + ncols; i < m; ++i) {
        yOffset[i] += yExtent[r - 1];
      }
    }
  }

  // perform horizontal grid layout
  for (x = 0, i = 0; i < n; ++i) {
    x = xOffset[i] + (i % ncols ? x : 0);
    dx[i] += x - groups[i].x;
  }

  // perform vertical grid layout
  for (c = 0; c < ncols; ++c) {
    for (y = 0, i = c; i < n; i += ncols) {
      y += yOffset[i];
      dy[i] += y - groups[i].y;
    }
  }

  // perform horizontal centering
  if (alignCol && extension_vega_view_transforms_module_get(opt.center, extension_vega_view_transforms_module_Column) && nrows > 1) {
    for (i = 0; i < n; ++i) {
      b = alignCol === extension_All ? xMax : xExtent[i % ncols];
      x = b - boxes[i].x2 - groups[i].x - dx[i];
      if (x > 0) dx[i] += x / 2;
    }
  }

  // perform vertical centering
  if (alignRow && extension_vega_view_transforms_module_get(opt.center, extension_vega_view_transforms_module_Row) && ncols !== 1) {
    for (i = 0; i < n; ++i) {
      b = alignRow === extension_All ? yMax : yExtent[~~(i / ncols)];
      y = b - boxes[i].y2 - groups[i].y - dy[i];
      if (y > 0) dy[i] += y / 2;
    }
  }

  // position grid relative to anchor
  for (i = 0; i < n; ++i) {
    bounds.union(boxes[i].translate(dx[i], dy[i]));
  }
  x = extension_vega_view_transforms_module_get(opt.anchor, extension_X);
  y = extension_vega_view_transforms_module_get(opt.anchor, extension_Y);
  switch (extension_vega_view_transforms_module_get(opt.anchor, extension_vega_view_transforms_module_Column)) {
    case extension_End:
      x -= bounds.width();
      break;
    case extension_Middle:
      x -= bounds.width() / 2;
  }
  switch (extension_vega_view_transforms_module_get(opt.anchor, extension_vega_view_transforms_module_Row)) {
    case extension_End:
      y -= bounds.height();
      break;
    case extension_Middle:
      y -= bounds.height() / 2;
  }
  x = Math.round(x);
  y = Math.round(y);

  // update mark positions, bounds, dirty
  bounds.clear();
  for (i = 0; i < n; ++i) {
    groups[i].mark.bounds.clear();
  }
  for (i = 0; i < n; ++i) {
    g = groups[i];
    g.x += dx[i] += x;
    g.y += dy[i] += y;
    bounds.union(g.mark.bounds.union(g.bounds.translate(dx[i], dy[i])));
    if (dirty) view.dirty(g);
  }
  return bounds;
}
function extension_trellisLayout(view, group, opt) {
  var views = extension_gridLayoutGroups(group),
    groups = views.marks,
    bbox = opt.bounds === extension_Flush ? extension_boundFlush : extension_boundFull,
    off = opt.offset,
    ncols = opt.columns || groups.length,
    nrows = ncols <= 0 ? 1 : Math.ceil(groups.length / ncols),
    cells = nrows * ncols,
    x,
    y,
    x2,
    y2,
    anchor,
    band,
    offset;

  // -- initial grid layout
  const bounds = extension_gridLayout(view, groups, opt);
  if (bounds.empty()) bounds.set(0, 0, 0, 0); // empty grid

  // -- layout grid headers and footers --

  // perform row header layout
  if (views.rowheaders) {
    band = extension_vega_view_transforms_module_get(opt.headerBand, extension_vega_view_transforms_module_Row, null);
    x = extension_layoutHeaders(view, views.rowheaders, groups, ncols, nrows, -extension_vega_view_transforms_module_get(off, 'rowHeader'), extension_vega_view_transforms_module_min, 0, bbox, 'x1', 0, ncols, 1, band);
  }

  // perform column header layout
  if (views.colheaders) {
    band = extension_vega_view_transforms_module_get(opt.headerBand, extension_vega_view_transforms_module_Column, null);
    y = extension_layoutHeaders(view, views.colheaders, groups, ncols, ncols, -extension_vega_view_transforms_module_get(off, 'columnHeader'), extension_vega_view_transforms_module_min, 1, bbox, 'y1', 0, 1, ncols, band);
  }

  // perform row footer layout
  if (views.rowfooters) {
    band = extension_vega_view_transforms_module_get(opt.footerBand, extension_vega_view_transforms_module_Row, null);
    x2 = extension_layoutHeaders(view, views.rowfooters, groups, ncols, nrows, extension_vega_view_transforms_module_get(off, 'rowFooter'), extension_vega_view_transforms_module_max, 0, bbox, 'x2', ncols - 1, ncols, 1, band);
  }

  // perform column footer layout
  if (views.colfooters) {
    band = extension_vega_view_transforms_module_get(opt.footerBand, extension_vega_view_transforms_module_Column, null);
    y2 = extension_layoutHeaders(view, views.colfooters, groups, ncols, ncols, extension_vega_view_transforms_module_get(off, 'columnFooter'), extension_vega_view_transforms_module_max, 1, bbox, 'y2', cells - ncols, 1, ncols, band);
  }

  // perform row title layout
  if (views.rowtitle) {
    anchor = extension_vega_view_transforms_module_get(opt.titleAnchor, extension_vega_view_transforms_module_Row);
    offset = extension_vega_view_transforms_module_get(off, 'rowTitle');
    offset = anchor === extension_End ? x2 + offset : x - offset;
    band = extension_vega_view_transforms_module_get(opt.titleBand, extension_vega_view_transforms_module_Row, 0.5);
    extension_layoutTitle(view, views.rowtitle, offset, 0, bounds, band);
  }

  // perform column title layout
  if (views.coltitle) {
    anchor = extension_vega_view_transforms_module_get(opt.titleAnchor, extension_vega_view_transforms_module_Column);
    offset = extension_vega_view_transforms_module_get(off, 'columnTitle');
    offset = anchor === extension_End ? y2 + offset : y - offset;
    band = extension_vega_view_transforms_module_get(opt.titleBand, extension_vega_view_transforms_module_Column, 0.5);
    extension_layoutTitle(view, views.coltitle, offset, 1, bounds, band);
  }
}
function extension_boundFlush(item, field) {
  return field === 'x1' ? item.x || 0 : field === 'y1' ? item.y || 0 : field === 'x2' ? (item.x || 0) + (item.width || 0) : field === 'y2' ? (item.y || 0) + (item.height || 0) : undefined;
}
function extension_boundFull(item, field) {
  return item.bounds[field];
}
function extension_layoutHeaders(view, headers, groups, ncols, limit, offset, agg, isX, bound, bf, start, stride, back, band) {
  var n = groups.length,
    init = 0,
    edge = 0,
    i,
    j,
    k,
    m,
    b,
    h,
    g,
    x,
    y;

  // if no groups, early exit and return 0
  if (!n) return init;

  // compute margin
  for (i = start; i < n; i += stride) {
    if (groups[i]) init = agg(init, bound(groups[i], bf));
  }

  // if no headers, return margin calculation
  if (!headers.length) return init;

  // check if number of headers exceeds number of rows or columns
  if (headers.length > limit) {
    view.warn('Grid headers exceed limit: ' + limit);
    headers = headers.slice(0, limit);
  }

  // apply offset
  init += offset;

  // clear mark bounds for all headers
  for (j = 0, m = headers.length; j < m; ++j) {
    view.dirty(headers[j]);
    headers[j].mark.bounds.clear();
  }

  // layout each header
  for (i = start, j = 0, m = headers.length; j < m; ++j, i += stride) {
    h = headers[j];
    b = h.mark.bounds;

    // search for nearest group to align to
    // necessary if table has empty cells
    for (k = i; k >= 0 && (g = groups[k]) == null; k -= back);

    // assign coordinates and update bounds
    if (isX) {
      x = band == null ? g.x : Math.round(g.bounds.x1 + band * g.bounds.width());
      y = init;
    } else {
      x = init;
      y = band == null ? g.y : Math.round(g.bounds.y1 + band * g.bounds.height());
    }
    b.union(h.bounds.translate(x - (h.x || 0), y - (h.y || 0)));
    h.x = x;
    h.y = y;
    view.dirty(h);

    // update current edge of layout bounds
    edge = agg(edge, b[bf]);
  }
  return edge;
}
function extension_layoutTitle(view, g, offset, isX, bounds, band) {
  if (!g) return;
  view.dirty(g);

  // compute title coordinates
  var x = offset,
    y = offset;
  isX ? x = Math.round(bounds.x1 + band * bounds.width()) : y = Math.round(bounds.y1 + band * bounds.height());

  // assign coordinates and update bounds
  g.bounds.translate(x - (g.x || 0), y - (g.y || 0));
  g.mark.bounds.clear().union(g.bounds);
  g.x = x;
  g.y = y;

  // queue title for redraw
  view.dirty(g);
}

// utility for looking up legend layout configuration
function extension_vega_view_transforms_module_lookup(config, orient) {
  const opt = config[orient] || {};
  return (key, d) => opt[key] != null ? opt[key] : config[key] != null ? config[key] : d;
}

// if legends specify offset directly, use the maximum specified value
function extension_offsets(legends, value) {
  let max = -Infinity;
  legends.forEach(item => {
    if (item.offset != null) max = Math.max(max, item.offset);
  });
  return max > -Infinity ? max : value;
}
function extension_legendParams(g, orient, config, xb, yb, w, h) {
  const _ = extension_vega_view_transforms_module_lookup(config, orient),
    offset = extension_offsets(g, _('offset', 0)),
    anchor = _('anchor', extension_Start),
    mult = anchor === extension_End ? 1 : anchor === extension_Middle ? 0.5 : 0;
  const p = {
    align: extension_Each,
    bounds: _('bounds', extension_Flush),
    columns: _('direction') === 'vertical' ? 1 : g.length,
    padding: _('margin', 8),
    center: _('center'),
    nodirty: true
  };
  switch (orient) {
    case extension_Left:
      p.anchor = {
        x: Math.floor(xb.x1) - offset,
        column: extension_End,
        y: mult * (h || xb.height() + 2 * xb.y1),
        row: anchor
      };
      break;
    case extension_Right:
      p.anchor = {
        x: Math.ceil(xb.x2) + offset,
        y: mult * (h || xb.height() + 2 * xb.y1),
        row: anchor
      };
      break;
    case extension_Top:
      p.anchor = {
        y: Math.floor(yb.y1) - offset,
        row: extension_End,
        x: mult * (w || yb.width() + 2 * yb.x1),
        column: anchor
      };
      break;
    case extension_Bottom:
      p.anchor = {
        y: Math.ceil(yb.y2) + offset,
        x: mult * (w || yb.width() + 2 * yb.x1),
        column: anchor
      };
      break;
    case extension_TopLeft:
      p.anchor = {
        x: offset,
        y: offset
      };
      break;
    case extension_TopRight:
      p.anchor = {
        x: w - offset,
        y: offset,
        column: extension_End
      };
      break;
    case extension_BottomLeft:
      p.anchor = {
        x: offset,
        y: h - offset,
        row: extension_End
      };
      break;
    case extension_BottomRight:
      p.anchor = {
        x: w - offset,
        y: h - offset,
        column: extension_End,
        row: extension_End
      };
      break;
  }
  return p;
}
function extension_legendLayout(view, legend) {
  var item = legend.items[0],
    datum = item.datum,
    orient = item.orient,
    bounds = item.bounds,
    x = item.x,
    y = item.y,
    w,
    h;

  // cache current bounds for later comparison
  item._bounds ? item._bounds.clear().union(bounds) : item._bounds = bounds.clone();
  bounds.clear();

  // adjust legend to accommodate padding and title
  extension_legendGroupLayout(view, item, item.items[0].items[0]);

  // aggregate bounds to determine size, and include origin
  bounds = extension_legendBounds(item, bounds);
  w = 2 * item.padding;
  h = 2 * item.padding;
  if (!bounds.empty()) {
    w = Math.ceil(bounds.width() + w);
    h = Math.ceil(bounds.height() + h);
  }
  if (datum.type === extension_Symbols) {
    extension_legendEntryLayout(item.items[0].items[0].items[0].items);
  }
  if (orient !== extension_vega_view_transforms_module_None) {
    item.x = x = 0;
    item.y = y = 0;
  }
  item.width = w;
  item.height = h;
  extension_boundStroke(bounds.set(x, y, x + w, y + h), item);
  item.mark.bounds.clear().union(bounds);
  return item;
}
function extension_legendBounds(item, b) {
  // aggregate item bounds
  item.items.forEach(_ => b.union(_.bounds));

  // anchor to legend origin
  b.x1 = item.padding;
  b.y1 = item.padding;
  return b;
}
function extension_legendGroupLayout(view, item, entry) {
  var pad = item.padding,
    ex = pad - entry.x,
    ey = pad - entry.y;
  if (!item.datum.title) {
    if (ex || ey) extension_vega_view_transforms_module_translate(view, entry, ex, ey);
  } else {
    var title = item.items[1].items[0],
      anchor = title.anchor,
      tpad = item.titlePadding || 0,
      tx = pad - title.x,
      ty = pad - title.y;
    switch (title.orient) {
      case extension_Left:
        ex += Math.ceil(title.bounds.width()) + tpad;
        break;
      case extension_Right:
      case extension_Bottom:
        break;
      default:
        ey += title.bounds.height() + tpad;
    }
    if (ex || ey) extension_vega_view_transforms_module_translate(view, entry, ex, ey);
    switch (title.orient) {
      case extension_Left:
        ty += extension_legendTitleOffset(item, entry, title, anchor, 1, 1);
        break;
      case extension_Right:
        tx += extension_legendTitleOffset(item, entry, title, extension_End, 0, 0) + tpad;
        ty += extension_legendTitleOffset(item, entry, title, anchor, 1, 1);
        break;
      case extension_Bottom:
        tx += extension_legendTitleOffset(item, entry, title, anchor, 0, 0);
        ty += extension_legendTitleOffset(item, entry, title, extension_End, -1, 0, 1) + tpad;
        break;
      default:
        tx += extension_legendTitleOffset(item, entry, title, anchor, 0, 0);
    }
    if (tx || ty) extension_vega_view_transforms_module_translate(view, title, tx, ty);

    // translate legend if title pushes into negative coordinates
    if ((tx = Math.round(title.bounds.x1 - pad)) < 0) {
      extension_vega_view_transforms_module_translate(view, entry, -tx, 0);
      extension_vega_view_transforms_module_translate(view, title, -tx, 0);
    }
  }
}
function extension_legendTitleOffset(item, entry, title, anchor, y, lr, noBar) {
  const grad = item.datum.type !== 'symbol',
    vgrad = title.datum.vgrad,
    e = grad && (lr || !vgrad) && !noBar ? entry.items[0] : entry,
    s = e.bounds[y ? 'y2' : 'x2'] - item.padding,
    u = vgrad && lr ? s : 0,
    v = vgrad && lr ? 0 : s,
    o = y <= 0 ? 0 : extension_multiLineOffset(title);
  return Math.round(anchor === extension_Start ? u : anchor === extension_End ? v - o : 0.5 * (s - o));
}
function extension_vega_view_transforms_module_translate(view, item, dx, dy) {
  item.x += dx;
  item.y += dy;
  item.bounds.translate(dx, dy);
  item.mark.bounds.translate(dx, dy);
  view.dirty(item);
}
function extension_legendEntryLayout(entries) {
  // get max widths for each column
  const widths = entries.reduce((w, g) => {
    w[g.column] = Math.max(g.bounds.x2 - g.x, w[g.column] || 0);
    return w;
  }, {});

  // set dimensions of legend entry groups
  entries.forEach(g => {
    g.width = widths[g.column];
    g.height = g.bounds.y2 - g.y;
  });
}

function extension_titleLayout(view, mark, width, height, viewBounds) {
  var group = mark.items[0],
    frame = group.frame,
    orient = group.orient,
    anchor = group.anchor,
    offset = group.offset,
    padding = group.padding,
    title = group.items[0].items[0],
    subtitle = group.items[1] && group.items[1].items[0],
    end = orient === extension_Left || orient === extension_Right ? height : width,
    start = 0,
    x = 0,
    y = 0,
    sx = 0,
    sy = 0,
    pos;
  if (frame !== extension_Group) {
    orient === extension_Left ? (start = viewBounds.y2, end = viewBounds.y1) : orient === extension_Right ? (start = viewBounds.y1, end = viewBounds.y2) : (start = viewBounds.x1, end = viewBounds.x2);
  } else if (orient === extension_Left) {
    start = height, end = 0;
  }
  pos = anchor === extension_Start ? start : anchor === extension_End ? end : (start + end) / 2;
  if (subtitle && subtitle.text) {
    // position subtitle
    switch (orient) {
      case extension_Top:
      case extension_Bottom:
        sy = title.bounds.height() + padding;
        break;
      case extension_Left:
        sx = title.bounds.width() + padding;
        break;
      case extension_Right:
        sx = -title.bounds.width() - padding;
        break;
    }
    extension_vega_view_transforms_module_tempBounds.clear().union(subtitle.bounds);
    extension_vega_view_transforms_module_tempBounds.translate(sx - (subtitle.x || 0), sy - (subtitle.y || 0));
    if (extension_vega_view_transforms_module_set(subtitle, 'x', sx) | extension_vega_view_transforms_module_set(subtitle, 'y', sy)) {
      view.dirty(subtitle);
      subtitle.bounds.clear().union(extension_vega_view_transforms_module_tempBounds);
      subtitle.mark.bounds.clear().union(extension_vega_view_transforms_module_tempBounds);
      view.dirty(subtitle);
    }
    extension_vega_view_transforms_module_tempBounds.clear().union(subtitle.bounds);
  } else {
    extension_vega_view_transforms_module_tempBounds.clear();
  }
  extension_vega_view_transforms_module_tempBounds.union(title.bounds);

  // position title group
  switch (orient) {
    case extension_Top:
      x = pos;
      y = viewBounds.y1 - extension_vega_view_transforms_module_tempBounds.height() - offset;
      break;
    case extension_Left:
      x = viewBounds.x1 - extension_vega_view_transforms_module_tempBounds.width() - offset;
      y = pos;
      break;
    case extension_Right:
      x = viewBounds.x2 + extension_vega_view_transforms_module_tempBounds.width() + offset;
      y = pos;
      break;
    case extension_Bottom:
      x = pos;
      y = viewBounds.y2 + offset;
      break;
    default:
      x = group.x;
      y = group.y;
  }
  if (extension_vega_view_transforms_module_set(group, 'x', x) | extension_vega_view_transforms_module_set(group, 'y', y)) {
    extension_vega_view_transforms_module_tempBounds.translate(x, y);
    view.dirty(group);
    group.bounds.clear().union(extension_vega_view_transforms_module_tempBounds);
    mark.bounds.clear().union(extension_vega_view_transforms_module_tempBounds);
    view.dirty(group);
  }
  return group.bounds;
}

/**
 * Layout view elements such as axes and legends.
 * Also performs size adjustments.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {object} params.mark - Scenegraph mark of groups to layout.
 */
function extension_ViewLayout(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_ViewLayout, extension_Transform, {
  transform(_, pulse) {
    const view = pulse.dataflow;
    _.mark.items.forEach(group => {
      if (_.layout) extension_trellisLayout(view, group, _.layout);
      extension_layoutGroup(view, group, _);
    });
    return extension_shouldReflow(_.mark.group) ? pulse.reflow() : pulse;
  }
});
function extension_shouldReflow(group) {
  // We typically should reflow if layout is invoked (#2568), as child items
  // may have resized and reflow ensures group bounds are re-calculated.
  // However, legend entries have a special exception to avoid instability.
  // For example, if a selected legend symbol gains a stroke on hover,
  // we don't want to re-position subsequent elements in the legend.
  return group && group.mark.role !== 'legend-entry';
}
function extension_layoutGroup(view, group, _) {
  var items = group.items,
    width = Math.max(0, group.width || 0),
    height = Math.max(0, group.height || 0),
    viewBounds = new extension_Bounds().set(0, 0, width, height),
    xBounds = viewBounds.clone(),
    yBounds = viewBounds.clone(),
    legends = [],
    title,
    mark,
    orient,
    b,
    i,
    n;

  // layout axes, gather legends, collect bounds
  for (i = 0, n = items.length; i < n; ++i) {
    mark = items[i];
    switch (mark.role) {
      case extension_AxisRole:
        b = extension_isYAxis(mark) ? xBounds : yBounds;
        b.union(extension_axisLayout(view, mark, width, height));
        break;
      case extension_TitleRole:
        title = mark;
        break;
      case extension_LegendRole:
        legends.push(extension_legendLayout(view, mark));
        break;
      case extension_FrameRole:
      case extension_ScopeRole:
      case extension_RowHeader:
      case extension_RowFooter:
      case extension_RowTitle:
      case extension_ColHeader:
      case extension_ColFooter:
      case extension_ColTitle:
        xBounds.union(mark.bounds);
        yBounds.union(mark.bounds);
        break;
      default:
        viewBounds.union(mark.bounds);
    }
  }

  // layout legends, adjust viewBounds
  if (legends.length) {
    // group legends by orient
    const l = {};
    legends.forEach(item => {
      orient = item.orient || extension_Right;
      if (orient !== extension_vega_view_transforms_module_None) (l[orient] || (l[orient] = [])).push(item);
    });

    // perform grid layout for each orient group
    for (const orient in l) {
      const g = l[orient];
      extension_gridLayout(view, g, extension_legendParams(g, orient, _.legends, xBounds, yBounds, width, height));
    }

    // update view bounds
    legends.forEach(item => {
      const b = item.bounds;
      if (!b.equals(item._bounds)) {
        item.bounds = item._bounds;
        view.dirty(item); // dirty previous location
        item.bounds = b;
        view.dirty(item);
      }
      if (_.autosize && (_.autosize.type === extension_Fit || _.autosize.type === extension_FitX || _.autosize.type === extension_FitY)) {
        // For autosize fit, incorporate the orthogonal dimension only.
        // Legends that overrun the chart area will then be clipped;
        // otherwise the chart area gets reduced to nothing!
        switch (item.orient) {
          case extension_Left:
          case extension_Right:
            viewBounds.add(b.x1, 0).add(b.x2, 0);
            break;
          case extension_Top:
          case extension_Bottom:
            viewBounds.add(0, b.y1).add(0, b.y2);
        }
      } else {
        viewBounds.union(b);
      }
    });
  }

  // combine bounding boxes
  viewBounds.union(xBounds).union(yBounds);

  // layout title, adjust bounds
  if (title) {
    viewBounds.union(extension_titleLayout(view, title, width, height, viewBounds));
  }

  // override aggregated view bounds if content is clipped
  if (group.clip) {
    viewBounds.set(0, 0, group.width || 0, group.height || 0);
  }

  // perform size adjustment
  extension_viewSizeLayout(view, group, viewBounds, _);
}
function extension_viewSizeLayout(view, group, viewBounds, _) {
  const auto = _.autosize || {},
    type = auto.type;
  if (view._autosize < 1 || !type) return;
  let viewWidth = view._width,
    viewHeight = view._height,
    width = Math.max(0, group.width || 0),
    left = Math.max(0, Math.ceil(-viewBounds.x1)),
    height = Math.max(0, group.height || 0),
    top = Math.max(0, Math.ceil(-viewBounds.y1));
  const right = Math.max(0, Math.ceil(viewBounds.x2 - width)),
    bottom = Math.max(0, Math.ceil(viewBounds.y2 - height));
  if (auto.contains === extension_Padding) {
    const padding = view.padding();
    viewWidth -= padding.left + padding.right;
    viewHeight -= padding.top + padding.bottom;
  }
  if (type === extension_vega_view_transforms_module_None) {
    left = 0;
    top = 0;
    width = viewWidth;
    height = viewHeight;
  } else if (type === extension_Fit) {
    width = Math.max(0, viewWidth - left - right);
    height = Math.max(0, viewHeight - top - bottom);
  } else if (type === extension_FitX) {
    width = Math.max(0, viewWidth - left - right);
    viewHeight = height + top + bottom;
  } else if (type === extension_FitY) {
    viewWidth = width + left + right;
    height = Math.max(0, viewHeight - top - bottom);
  } else if (type === extension_Pad) {
    viewWidth = width + left + right;
    viewHeight = height + top + bottom;
  }
  view._resizeView(viewWidth, viewHeight, width, height, [left, top], auto.resize);
}



;// ../../node_modules/d3-array/src/sum.js
function extension_sum_sum(values, valueof) {
  let sum = 0;
  if (valueof === undefined) {
    for (let value of values) {
      if (value = +value) {
        sum += value;
      }
    }
  } else {
    let index = -1;
    for (let value of values) {
      if (value = +valueof(value, ++index, values)) {
        sum += value;
      }
    }
  }
  return sum;
}

;// ../../node_modules/vega-encode/build/vega-encode.module.js






/**
 * Generates axis ticks for visualizing a spatial scale.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Scale} params.scale - The scale to generate ticks for.
 * @param {*} [params.count=10] - The approximate number of ticks, or
 *   desired tick interval, to use.
 * @param {Array<*>} [params.values] - The exact tick values to use.
 *   These must be legal domain values for the provided scale.
 *   If provided, the count argument is ignored.
 * @param {function(*):string} [params.formatSpecifier] - A format specifier
 *   to use in conjunction with scale.tickFormat. Legal values are
 *   any valid d3 4.0 format specifier.
 * @param {function(*):string} [params.format] - The format function to use.
 *   If provided, the formatSpecifier argument is ignored.
 */
function extension_AxisTicks(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_AxisTicks, extension_Transform, {
  transform(_, pulse) {
    if (this.value && !_.modified()) {
      return pulse.StopPropagation;
    }
    var locale = pulse.dataflow.locale(),
      out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS),
      ticks = this.value,
      scale = _.scale,
      tally = _.count == null ? _.values ? _.values.length : 10 : _.count,
      count = extension_tickCount(scale, tally, _.minstep),
      format = _.format || extension_vega_scale_module_tickFormat(locale, scale, count, _.formatSpecifier, _.formatType, !!_.values),
      values = _.values ? extension_validTicks(scale, _.values, count) : extension_tickValues(scale, count);
    if (ticks) out.rem = ticks;
    ticks = values.map((value, i) => extension_ingest$1({
      index: i / (values.length - 1 || 1),
      value: value,
      label: format(value)
    }));
    if (_.extra && ticks.length) {
      // add an extra tick pegged to the initial domain value
      // this is used to generate axes with 'binned' domains
      ticks.push(extension_ingest$1({
        index: -1,
        extra: {
          value: ticks[0].value
        },
        label: ''
      }));
    }
    out.source = ticks;
    out.add = ticks;
    this.value = ticks;
    return out;
  }
});

/**
 * Joins a set of data elements against a set of visual items.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): object} [params.item] - An item generator function.
 * @param {function(object): *} [params.key] - The key field associating data and visual items.
 */
function extension_DataJoin(params) {
  extension_Transform.call(this, null, params);
}
function extension_defaultItemCreate() {
  return extension_ingest$1({});
}
function extension_newMap(key) {
  const map = extension_fastmap().test(t => t.exit);
  map.lookup = t => map.get(key(t));
  return map;
}
extension_inherits(extension_DataJoin, extension_Transform, {
  transform(_, pulse) {
    var df = pulse.dataflow,
      out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS),
      item = _.item || extension_defaultItemCreate,
      key = _.key || extension_tupleid,
      map = this.value;

    // prevent transient (e.g., hover) requests from
    // cascading across marks derived from marks
    if (extension_vega_util_module_isArray(out.encode)) {
      out.encode = null;
    }
    if (map && (_.modified('key') || pulse.modified(key))) {
      extension_vega_util_module_error('DataJoin does not support modified key function or fields.');
    }
    if (!map) {
      pulse = pulse.addAll();
      this.value = map = extension_newMap(key);
    }
    pulse.visit(pulse.ADD, t => {
      const k = key(t);
      let x = map.get(k);
      if (x) {
        if (x.exit) {
          map.empty--;
          out.add.push(x);
        } else {
          out.mod.push(x);
        }
      } else {
        x = item(t);
        map.set(k, x);
        out.add.push(x);
      }
      x.datum = t;
      x.exit = false;
    });
    pulse.visit(pulse.MOD, t => {
      const k = key(t),
        x = map.get(k);
      if (x) {
        x.datum = t;
        out.mod.push(x);
      }
    });
    pulse.visit(pulse.REM, t => {
      const k = key(t),
        x = map.get(k);
      if (t === x.datum && !x.exit) {
        out.rem.push(x);
        x.exit = true;
        ++map.empty;
      }
    });
    if (pulse.changed(pulse.ADD_MOD)) out.modifies('datum');
    if (pulse.clean() || _.clean && map.empty > df.cleanThreshold) {
      df.runAfter(map.clean);
    }
    return out;
  }
});

/**
 * Invokes encoding functions for visual items.
 * @constructor
 * @param {object} params - The parameters to the encoding functions. This
 *   parameter object will be passed through to all invoked encoding functions.
 * @param {object} [params.mod=false] - Flag indicating if tuples in the input
 *   mod set that are unmodified by encoders should be included in the output.
 * @param {object} param.encoders - The encoding functions
 * @param {function(object, object): boolean} [param.encoders.update] - Update encoding set
 * @param {function(object, object): boolean} [param.encoders.enter] - Enter encoding set
 * @param {function(object, object): boolean} [param.encoders.exit] - Exit encoding set
 */
function extension_Encode(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_Encode, extension_Transform, {
  transform(_, pulse) {
    var out = pulse.fork(pulse.ADD_REM),
      fmod = _.mod || false,
      encoders = _.encoders,
      encode = pulse.encode;

    // if an array, the encode directive includes additional sets
    // that must be defined in order for the primary set to be invoked
    // e.g., only run the update set if the hover set is defined
    if (extension_vega_util_module_isArray(encode)) {
      if (out.changed() || encode.every(e => encoders[e])) {
        encode = encode[0];
        out.encode = null; // consume targeted encode directive
      } else {
        return pulse.StopPropagation;
      }
    }

    // marshall encoder functions
    var reenter = encode === 'enter',
      update = encoders.update || extension_falsy,
      enter = encoders.enter || extension_falsy,
      exit = encoders.exit || extension_falsy,
      set = (encode && !reenter ? encoders[encode] : update) || extension_falsy;
    if (pulse.changed(pulse.ADD)) {
      pulse.visit(pulse.ADD, t => {
        enter(t, _);
        update(t, _);
      });
      out.modifies(enter.output);
      out.modifies(update.output);
      if (set !== extension_falsy && set !== update) {
        pulse.visit(pulse.ADD, t => {
          set(t, _);
        });
        out.modifies(set.output);
      }
    }
    if (pulse.changed(pulse.REM) && exit !== extension_falsy) {
      pulse.visit(pulse.REM, t => {
        exit(t, _);
      });
      out.modifies(exit.output);
    }
    if (reenter || set !== extension_falsy) {
      const flag = pulse.MOD | (_.modified() ? pulse.REFLOW : 0);
      if (reenter) {
        pulse.visit(flag, t => {
          const mod = enter(t, _) || fmod;
          if (set(t, _) || mod) out.mod.push(t);
        });
        if (out.mod.length) out.modifies(enter.output);
      } else {
        pulse.visit(flag, t => {
          if (set(t, _) || fmod) out.mod.push(t);
        });
      }
      if (out.mod.length) out.modifies(set.output);
    }
    return out.changed() ? out : pulse.StopPropagation;
  }
});

/**
 * Generates legend entries for visualizing a scale.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Scale} params.scale - The scale to generate items for.
 * @param {*} [params.count=5] - The approximate number of items, or
 *   desired tick interval, to use.
 * @param {*} [params.limit] - The maximum number of entries to
 *   include in a symbol legend.
 * @param {Array<*>} [params.values] - The exact tick values to use.
 *   These must be legal domain values for the provided scale.
 *   If provided, the count argument is ignored.
 * @param {string} [params.formatSpecifier] - A format specifier
 *   to use in conjunction with scale.tickFormat. Legal values are
 *   any valid D3 format specifier string.
 * @param {function(*):string} [params.format] - The format function to use.
 *   If provided, the formatSpecifier argument is ignored.
 */
function extension_LegendEntries(params) {
  extension_Transform.call(this, [], params);
}
extension_inherits(extension_LegendEntries, extension_Transform, {
  transform(_, pulse) {
    if (this.value != null && !_.modified()) {
      return pulse.StopPropagation;
    }
    var locale = pulse.dataflow.locale(),
      out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS),
      items = this.value,
      type = _.type || extension_SymbolLegend,
      scale = _.scale,
      limit = +_.limit,
      count = extension_tickCount(scale, _.count == null ? 5 : _.count, _.minstep),
      lskip = !!_.values || type === extension_SymbolLegend,
      format = _.format || extension_labelFormat(locale, scale, count, type, _.formatSpecifier, _.formatType, lskip),
      values = _.values || extension_labelValues(scale, count),
      domain,
      fraction,
      size,
      offset,
      ellipsis;
    if (items) out.rem = items;
    if (type === extension_SymbolLegend) {
      if (limit && values.length > limit) {
        pulse.dataflow.warn('Symbol legend count exceeds limit, filtering items.');
        items = values.slice(0, limit - 1);
        ellipsis = true;
      } else {
        items = values;
      }
      if (extension_vega_util_module_isFunction(size = _.size)) {
        // if first value maps to size zero, remove from list (vega#717)
        if (!_.values && scale(items[0]) === 0) {
          items = items.slice(1);
        }
        // compute size offset for legend entries
        offset = items.reduce((max, value) => Math.max(max, size(value, _)), 0);
      } else {
        size = extension_vega_util_module_constant(offset = size || 8);
      }
      items = items.map((value, index) => extension_ingest$1({
        index: index,
        label: format(value, index, items),
        value: value,
        offset: offset,
        size: size(value, _)
      }));
      if (ellipsis) {
        ellipsis = values[items.length];
        items.push(extension_ingest$1({
          index: items.length,
          label: `\u2026${values.length - items.length} entries`,
          value: ellipsis,
          offset: offset,
          size: size(ellipsis, _)
        }));
      }
    } else if (type === extension_GradientLegend) {
      domain = scale.domain(), fraction = extension_scaleFraction(scale, domain[0], extension_peek(domain));

      // if automatic label generation produces 2 or fewer values,
      // use the domain end points instead (fixes vega/vega#1364)
      if (values.length < 3 && !_.values && domain[0] !== extension_peek(domain)) {
        values = [domain[0], extension_peek(domain)];
      }
      items = values.map((value, index) => extension_ingest$1({
        index: index,
        label: format(value, index, values),
        value: value,
        perc: fraction(value)
      }));
    } else {
      size = values.length - 1;
      fraction = extension_labelFraction(scale);
      items = values.map((value, index) => extension_ingest$1({
        index: index,
        label: format(value, index, values),
        value: value,
        perc: index ? fraction(value) : 0,
        perc2: index === size ? 1 : fraction(values[index + 1])
      }));
    }
    out.source = items;
    out.add = items;
    this.value = items;
    return out;
  }
});

const extension_sourceX = t => t.source.x;
const extension_sourceY = t => t.source.y;
const extension_targetX = t => t.target.x;
const extension_targetY = t => t.target.y;

/**
 * Layout paths linking source and target elements.
 * @constructor
 * @param {object} params - The parameters for this operator.
 */
function extension_LinkPath(params) {
  extension_Transform.call(this, {}, params);
}
extension_LinkPath.Definition = {
  'type': 'LinkPath',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'sourceX',
    'type': 'field',
    'default': 'source.x'
  }, {
    'name': 'sourceY',
    'type': 'field',
    'default': 'source.y'
  }, {
    'name': 'targetX',
    'type': 'field',
    'default': 'target.x'
  }, {
    'name': 'targetY',
    'type': 'field',
    'default': 'target.y'
  }, {
    'name': 'orient',
    'type': 'enum',
    'default': 'vertical',
    'values': ['horizontal', 'vertical', 'radial']
  }, {
    'name': 'shape',
    'type': 'enum',
    'default': 'line',
    'values': ['line', 'arc', 'curve', 'diagonal', 'orthogonal']
  }, {
    'name': 'require',
    'type': 'signal'
  }, {
    'name': 'as',
    'type': 'string',
    'default': 'path'
  }]
};
extension_inherits(extension_LinkPath, extension_Transform, {
  transform(_, pulse) {
    var sx = _.sourceX || extension_sourceX,
      sy = _.sourceY || extension_sourceY,
      tx = _.targetX || extension_targetX,
      ty = _.targetY || extension_targetY,
      as = _.as || 'path',
      orient = _.orient || 'vertical',
      shape = _.shape || 'line',
      path = extension_Paths.get(shape + '-' + orient) || extension_Paths.get(shape);
    if (!path) {
      extension_vega_util_module_error('LinkPath unsupported type: ' + _.shape + (_.orient ? '-' + _.orient : ''));
    }
    pulse.visit(pulse.SOURCE, t => {
      t[as] = path(sx(t), sy(t), tx(t), ty(t));
    });
    return pulse.reflow(_.modified()).modifies(as);
  }
});
const extension_vega_encode_module_line = (sx, sy, tx, ty) => 'M' + sx + ',' + sy + 'L' + tx + ',' + ty;
const extension_lineR = (sa, sr, ta, tr) => extension_vega_encode_module_line(sr * Math.cos(sa), sr * Math.sin(sa), tr * Math.cos(ta), tr * Math.sin(ta));
const extension_vega_encode_module_arc = (sx, sy, tx, ty) => {
  var dx = tx - sx,
    dy = ty - sy,
    rr = Math.hypot(dx, dy) / 2,
    ra = 180 * Math.atan2(dy, dx) / Math.PI;
  return 'M' + sx + ',' + sy + 'A' + rr + ',' + rr + ' ' + ra + ' 0 1' + ' ' + tx + ',' + ty;
};
const extension_arcR = (sa, sr, ta, tr) => extension_vega_encode_module_arc(sr * Math.cos(sa), sr * Math.sin(sa), tr * Math.cos(ta), tr * Math.sin(ta));
const extension_curve = (sx, sy, tx, ty) => {
  const dx = tx - sx,
    dy = ty - sy,
    ix = 0.2 * (dx + dy),
    iy = 0.2 * (dy - dx);
  return 'M' + sx + ',' + sy + 'C' + (sx + ix) + ',' + (sy + iy) + ' ' + (tx + iy) + ',' + (ty - ix) + ' ' + tx + ',' + ty;
};
const extension_curveR = (sa, sr, ta, tr) => extension_curve(sr * Math.cos(sa), sr * Math.sin(sa), tr * Math.cos(ta), tr * Math.sin(ta));
const extension_orthoX = (sx, sy, tx, ty) => 'M' + sx + ',' + sy + 'V' + ty + 'H' + tx;
const extension_orthoY = (sx, sy, tx, ty) => 'M' + sx + ',' + sy + 'H' + tx + 'V' + ty;
const extension_orthoR = (sa, sr, ta, tr) => {
  const sc = Math.cos(sa),
    ss = Math.sin(sa),
    tc = Math.cos(ta),
    ts = Math.sin(ta),
    sf = Math.abs(ta - sa) > Math.PI ? ta <= sa : ta > sa;
  return 'M' + sr * sc + ',' + sr * ss + 'A' + sr + ',' + sr + ' 0 0,' + (sf ? 1 : 0) + ' ' + sr * tc + ',' + sr * ts + 'L' + tr * tc + ',' + tr * ts;
};
const extension_diagonalX = (sx, sy, tx, ty) => {
  const m = (sx + tx) / 2;
  return 'M' + sx + ',' + sy + 'C' + m + ',' + sy + ' ' + m + ',' + ty + ' ' + tx + ',' + ty;
};
const extension_diagonalY = (sx, sy, tx, ty) => {
  const m = (sy + ty) / 2;
  return 'M' + sx + ',' + sy + 'C' + sx + ',' + m + ' ' + tx + ',' + m + ' ' + tx + ',' + ty;
};
const extension_diagonalR = (sa, sr, ta, tr) => {
  const sc = Math.cos(sa),
    ss = Math.sin(sa),
    tc = Math.cos(ta),
    ts = Math.sin(ta),
    mr = (sr + tr) / 2;
  return 'M' + sr * sc + ',' + sr * ss + 'C' + mr * sc + ',' + mr * ss + ' ' + mr * tc + ',' + mr * ts + ' ' + tr * tc + ',' + tr * ts;
};
const extension_Paths = extension_fastmap({
  'line': extension_vega_encode_module_line,
  'line-radial': extension_lineR,
  'arc': extension_vega_encode_module_arc,
  'arc-radial': extension_arcR,
  'curve': extension_curve,
  'curve-radial': extension_curveR,
  'orthogonal-horizontal': extension_orthoX,
  'orthogonal-vertical': extension_orthoY,
  'orthogonal-radial': extension_orthoR,
  'diagonal-horizontal': extension_diagonalX,
  'diagonal-vertical': extension_diagonalY,
  'diagonal-radial': extension_diagonalR
});

/**
 * Pie and donut chart layout.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The value field to size pie segments.
 * @param {number} [params.startAngle=0] - The start angle (in radians) of the layout.
 * @param {number} [params.endAngle=2π] - The end angle (in radians) of the layout.
 * @param {boolean} [params.sort] - Boolean flag for sorting sectors by value.
 */
function extension_Pie(params) {
  extension_Transform.call(this, null, params);
}
extension_Pie.Definition = {
  'type': 'Pie',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'field',
    'type': 'field'
  }, {
    'name': 'startAngle',
    'type': 'number',
    'default': 0
  }, {
    'name': 'endAngle',
    'type': 'number',
    'default': 6.283185307179586
  }, {
    'name': 'sort',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': 2,
    'default': ['startAngle', 'endAngle']
  }]
};
extension_inherits(extension_Pie, extension_Transform, {
  transform(_, pulse) {
    var as = _.as || ['startAngle', 'endAngle'],
      startAngle = as[0],
      endAngle = as[1],
      field = _.field || extension_one,
      start = _.startAngle || 0,
      stop = _.endAngle != null ? _.endAngle : 2 * Math.PI,
      data = pulse.source,
      values = data.map(field),
      n = values.length,
      a = start,
      k = (stop - start) / extension_sum_sum(values),
      index = extension_range_range(n),
      i,
      t,
      v;
    if (_.sort) {
      index.sort((a, b) => values[a] - values[b]);
    }
    for (i = 0; i < n; ++i) {
      v = values[index[i]];
      t = data[index[i]];
      t[startAngle] = a;
      t[endAngle] = a += v * k;
    }
    this.value = values;
    return pulse.reflow(_.modified()).modifies(as);
  }
});

const extension_DEFAULT_COUNT = 5;
function extension_includeZero(scale) {
  const type = scale.type;
  return !scale.bins && (type === extension_vega_scale_module_Linear || type === extension_Pow || type === extension_Sqrt);
}
function extension_includePad(type) {
  return extension_isContinuous(type) && type !== extension_Sequential;
}
const extension_vega_encode_module_SKIP = extension_toSet(['set', 'modified', 'clear', 'type', 'scheme', 'schemeExtent', 'schemeCount', 'domain', 'domainMin', 'domainMid', 'domainMax', 'domainRaw', 'domainImplicit', 'nice', 'zero', 'bins', 'range', 'rangeStep', 'round', 'reverse', 'interpolate', 'interpolateGamma']);

/**
 * Maintains a scale function mapping data values to visual channels.
 * @constructor
 * @param {object} params - The parameters for this operator.
 */
function extension_Scale(params) {
  extension_Transform.call(this, null, params);
  this.modified(true); // always treat as modified
}
extension_inherits(extension_Scale, extension_Transform, {
  transform(_, pulse) {
    var df = pulse.dataflow,
      scale$1 = this.value,
      key = extension_scaleKey(_);
    if (!scale$1 || key !== scale$1.type) {
      this.value = scale$1 = extension_vega_scale_module_scale(key)();
    }
    for (key in _) if (!extension_vega_encode_module_SKIP[key]) {
      // padding is a scale property for band/point but not others
      if (key === 'padding' && extension_includePad(scale$1.type)) continue;
      // invoke scale property setter, raise warning if not found
      extension_vega_util_module_isFunction(scale$1[key]) ? scale$1[key](_[key]) : df.warn('Unsupported scale property: ' + key);
    }
    extension_configureRange(scale$1, _, extension_configureBins(scale$1, _, extension_configureDomain(scale$1, _, df)));
    return pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS);
  }
});
function extension_scaleKey(_) {
  var t = _.type,
    d = '',
    n;

  // backwards compatibility pre Vega 5.
  if (t === extension_Sequential) return extension_Sequential + '-' + extension_vega_scale_module_Linear;
  if (extension_isContinuousColor(_)) {
    n = _.rawDomain ? _.rawDomain.length : _.domain ? _.domain.length + +(_.domainMid != null) : 0;
    d = n === 2 ? extension_Sequential + '-' : n === 3 ? extension_Diverging + '-' : '';
  }
  return (d + t || extension_vega_scale_module_Linear).toLowerCase();
}
function extension_isContinuousColor(_) {
  const t = _.type;
  return extension_isContinuous(t) && t !== extension_vega_scale_module_Time && t !== extension_UTC && (_.scheme || _.range && _.range.length && _.range.every(extension_vega_util_module_isString));
}
function extension_configureDomain(scale, _, df) {
  // check raw domain, if provided use that and exit early
  const raw = extension_rawDomain(scale, _.domainRaw, df);
  if (raw > -1) return raw;
  var domain = _.domain,
    type = scale.type,
    zero = _.zero || _.zero === undefined && extension_includeZero(scale),
    n,
    mid;
  if (!domain) return 0;

  // adjust domain based on zero, min, max settings
  if (zero || _.domainMin != null || _.domainMax != null || _.domainMid != null) {
    n = (domain = domain.slice()).length - 1 || 1;
    if (zero) {
      if (domain[0] > 0) domain[0] = 0;
      if (domain[n] < 0) domain[n] = 0;
    }
    if (_.domainMin != null) domain[0] = _.domainMin;
    if (_.domainMax != null) domain[n] = _.domainMax;
    if (_.domainMid != null) {
      mid = _.domainMid;
      const i = mid > domain[n] ? n + 1 : mid < domain[0] ? 0 : n;
      if (i !== n) df.warn('Scale domainMid exceeds domain min or max.', mid);
      domain.splice(i, 0, mid);
    }
  }

  // adjust continuous domain for minimum pixel padding
  if (extension_includePad(type) && _.padding && domain[0] !== extension_peek(domain)) {
    domain = extension_padDomain(type, domain, _.range, _.padding, _.exponent, _.constant);
  }

  // set the scale domain
  scale.domain(extension_domainCheck(type, domain, df));

  // if ordinal scale domain is defined, prevent implicit
  // domain construction as side-effect of scale lookup
  if (type === extension_Ordinal) {
    scale.unknown(_.domainImplicit ? extension_implicit : undefined);
  }

  // perform 'nice' adjustment as requested
  if (_.nice && scale.nice) {
    scale.nice(_.nice !== true && extension_tickCount(scale, _.nice) || null);
  }

  // return the cardinality of the domain
  return domain.length;
}
function extension_rawDomain(scale, raw, df) {
  if (raw) {
    scale.domain(extension_domainCheck(scale.type, raw, df));
    return raw.length;
  } else {
    return -1;
  }
}
function extension_padDomain(type, domain, range, pad, exponent, constant) {
  var span = Math.abs(extension_peek(range) - range[0]),
    frac = span / (span - 2 * pad),
    d = type === extension_Log ? extension_zoomLog(domain, null, frac) : type === extension_Sqrt ? extension_zoomPow(domain, null, frac, 0.5) : type === extension_Pow ? extension_zoomPow(domain, null, frac, exponent || 1) : type === extension_Symlog ? extension_zoomSymlog(domain, null, frac, constant || 1) : extension_zoomLinear(domain, null, frac);
  domain = domain.slice();
  domain[0] = d[0];
  domain[domain.length - 1] = d[1];
  return domain;
}
function extension_domainCheck(type, domain, df) {
  if (extension_isLogarithmic(type)) {
    // sum signs of domain values
    // if all pos or all neg, abs(sum) === domain.length
    var s = Math.abs(domain.reduce((s, v) => s + (v < 0 ? -1 : v > 0 ? 1 : 0), 0));
    if (s !== domain.length) {
      df.warn('Log scale domain includes zero: ' + extension_$(domain));
    }
  }
  return domain;
}
function extension_configureBins(scale, _, count) {
  let bins = _.bins;
  if (bins && !extension_vega_util_module_isArray(bins)) {
    // generate bin boundary array
    const domain = scale.domain(),
      lo = domain[0],
      hi = extension_peek(domain),
      step = bins.step;
    let start = bins.start == null ? lo : bins.start,
      stop = bins.stop == null ? hi : bins.stop;
    if (!step) extension_vega_util_module_error('Scale bins parameter missing step property.');
    if (start < lo) start = step * Math.ceil(lo / step);
    if (stop > hi) stop = step * Math.floor(hi / step);
    bins = extension_range_range(start, stop + step / 2, step);
  }
  if (bins) {
    // assign bin boundaries to scale instance
    scale.bins = bins;
  } else if (scale.bins) {
    // no current bins, remove bins if previously set
    delete scale.bins;
  }

  // special handling for bin-ordinal scales
  if (scale.type === extension_BinOrdinal) {
    if (!bins) {
      // the domain specifies the bins
      scale.bins = scale.domain();
    } else if (!_.domain && !_.domainRaw) {
      // the bins specify the domain
      scale.domain(bins);
      count = bins.length;
    }
  }

  // return domain cardinality
  return count;
}
function extension_configureRange(scale, _, count) {
  var type = scale.type,
    round = _.round || false,
    range = _.range;

  // if range step specified, calculate full range extent
  if (_.rangeStep != null) {
    range = extension_configureRangeStep(type, _, count);
  }

  // else if a range scheme is defined, use that
  else if (_.scheme) {
    range = extension_configureScheme(type, _, count);
    if (extension_vega_util_module_isFunction(range)) {
      if (scale.interpolator) {
        return scale.interpolator(range);
      } else {
        extension_vega_util_module_error(`Scale type ${type} does not support interpolating color schemes.`);
      }
    }
  }

  // given a range array for an interpolating scale, convert to interpolator
  if (range && extension_isInterpolating(type)) {
    return scale.interpolator(extension_interpolateColors(extension_flip(range, _.reverse), _.interpolate, _.interpolateGamma));
  }

  // configure rounding / interpolation
  if (range && _.interpolate && scale.interpolate) {
    scale.interpolate(extension_interpolate(_.interpolate, _.interpolateGamma));
  } else if (extension_vega_util_module_isFunction(scale.round)) {
    scale.round(round);
  } else if (extension_vega_util_module_isFunction(scale.rangeRound)) {
    scale.interpolate(round ? extension_src_round : extension_value);
  }
  if (range) scale.range(extension_flip(range, _.reverse));
}
function extension_configureRangeStep(type, _, count) {
  if (type !== extension_Band && type !== extension_Point) {
    extension_vega_util_module_error('Only band and point scales support rangeStep.');
  }

  // calculate full range based on requested step size and padding
  var outer = (_.paddingOuter != null ? _.paddingOuter : _.padding) || 0,
    inner = type === extension_Point ? 1 : (_.paddingInner != null ? _.paddingInner : _.padding) || 0;
  return [0, _.rangeStep * extension_bandSpace(count, inner, outer)];
}
function extension_configureScheme(type, _, count) {
  var extent = _.schemeExtent,
    name,
    scheme$1;
  if (extension_vega_util_module_isArray(_.scheme)) {
    scheme$1 = extension_interpolateColors(_.scheme, _.interpolate, _.interpolateGamma);
  } else {
    name = _.scheme.toLowerCase();
    scheme$1 = extension_scheme(name);
    if (!scheme$1) extension_vega_util_module_error(`Unrecognized scheme name: ${_.scheme}`);
  }

  // determine size for potential discrete range
  count = type === extension_Threshold ? count + 1 : type === extension_BinOrdinal ? count - 1 : type === extension_vega_scale_module_Quantile || type === extension_Quantize ? +_.schemeCount || extension_DEFAULT_COUNT : count;

  // adjust and/or quantize scheme as appropriate
  return extension_isInterpolating(type) ? extension_adjustScheme(scheme$1, extent, _.reverse) : extension_vega_util_module_isFunction(scheme$1) ? extension_quantizeInterpolator(extension_adjustScheme(scheme$1, extent), count) : type === extension_Ordinal ? scheme$1 : scheme$1.slice(0, count);
}
function extension_adjustScheme(scheme, extent, reverse) {
  return extension_vega_util_module_isFunction(scheme) && (extent || reverse) ? extension_interpolateRange(scheme, extension_flip(extent || [0, 1], reverse)) : scheme;
}
function extension_flip(array, reverse) {
  return reverse ? array.slice().reverse() : array;
}

/**
 * Sorts scenegraph items in the pulse source array.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(*,*): number} [params.sort] - A comparator
 *   function for sorting tuples.
 */
function extension_SortItems(params) {
  extension_Transform.call(this, null, params);
}
extension_inherits(extension_SortItems, extension_Transform, {
  transform(_, pulse) {
    const mod = _.modified('sort') || pulse.changed(pulse.ADD) || pulse.modified(_.sort.fields) || pulse.modified('datum');
    if (mod) pulse.source.sort(extension_stableCompare(_.sort));
    this.modified(mod);
    return pulse;
  }
});

const extension_Zero = 'zero',
  extension_Center = 'center',
  extension_Normalize = 'normalize',
  extension_DefOutput = ['y0', 'y1'];

/**
 * Stack layout for visualization elements.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The value field to stack.
 * @param {Array<function(object): *>} [params.groupby] - An array of accessors to groupby.
 * @param {function(object,object): number} [params.sort] - A comparator for stack sorting.
 * @param {string} [offset='zero'] - Stack baseline offset. One of 'zero', 'center', 'normalize'.
 */
function extension_Stack(params) {
  extension_Transform.call(this, null, params);
}
extension_Stack.Definition = {
  'type': 'Stack',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'field',
    'type': 'field'
  }, {
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'sort',
    'type': 'compare'
  }, {
    'name': 'offset',
    'type': 'enum',
    'default': extension_Zero,
    'values': [extension_Zero, extension_Center, extension_Normalize]
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': 2,
    'default': extension_DefOutput
  }]
};
extension_inherits(extension_Stack, extension_Transform, {
  transform(_, pulse) {
    var as = _.as || extension_DefOutput,
      y0 = as[0],
      y1 = as[1],
      sort = extension_stableCompare(_.sort),
      field = _.field || extension_one,
      stack = _.offset === extension_Center ? extension_stackCenter : _.offset === extension_Normalize ? extension_stackNormalize : extension_stackZero,
      groups,
      i,
      n,
      max;

    // partition, sum, and sort the stack groups
    groups = extension_vega_encode_module_partition(pulse.source, _.groupby, sort, field);

    // compute stack layouts per group
    for (i = 0, n = groups.length, max = groups.max; i < n; ++i) {
      stack(groups[i], max, field, y0, y1);
    }
    return pulse.reflow(_.modified()).modifies(as);
  }
});
function extension_stackCenter(group, max, field, y0, y1) {
  var last = (max - group.sum) / 2,
    m = group.length,
    j = 0,
    t;
  for (; j < m; ++j) {
    t = group[j];
    t[y0] = last;
    t[y1] = last += Math.abs(field(t));
  }
}
function extension_stackNormalize(group, max, field, y0, y1) {
  var scale = 1 / group.sum,
    last = 0,
    m = group.length,
    j = 0,
    v = 0,
    t;
  for (; j < m; ++j) {
    t = group[j];
    t[y0] = last;
    t[y1] = last = scale * (v += Math.abs(field(t)));
  }
}
function extension_stackZero(group, max, field, y0, y1) {
  var lastPos = 0,
    lastNeg = 0,
    m = group.length,
    j = 0,
    v,
    t;
  for (; j < m; ++j) {
    t = group[j];
    v = +field(t);
    if (v < 0) {
      t[y0] = lastNeg;
      t[y1] = lastNeg += v;
    } else {
      t[y0] = lastPos;
      t[y1] = lastPos += v;
    }
  }
}
function extension_vega_encode_module_partition(data, groupby, sort, field) {
  var groups = [],
    get = f => f(t),
    map,
    i,
    n,
    m,
    t,
    k,
    g,
    s,
    max;

  // partition data points into stack groups
  if (groupby == null) {
    groups.push(data.slice());
  } else {
    for (map = {}, i = 0, n = data.length; i < n; ++i) {
      t = data[i];
      k = groupby.map(get);
      g = map[k];
      if (!g) {
        map[k] = g = [];
        groups.push(g);
      }
      g.push(t);
    }
  }

  // compute sums of groups, sort groups as needed
  for (k = 0, max = 0, m = groups.length; k < m; ++k) {
    g = groups[k];
    for (i = 0, s = 0, n = g.length; i < n; ++i) {
      s += Math.abs(field(g[i]));
    }
    g.sum = s;
    if (s > max) max = s;
    if (sort) g.sort(sort);
  }
  groups.max = max;
  return groups;
}



;// ../../node_modules/d3-geo/src/identity.js
/* harmony default export */ const extension_d3_geo_src_identity = (x => x);

;// ../../node_modules/d3-geo/src/stream.js
function extension_streamGeometry(geometry, stream) {
  if (geometry && extension_streamGeometryType.hasOwnProperty(geometry.type)) {
    extension_streamGeometryType[geometry.type](geometry, stream);
  }
}

var extension_streamObjectType = {
  Feature: function(object, stream) {
    extension_streamGeometry(object.geometry, stream);
  },
  FeatureCollection: function(object, stream) {
    var features = object.features, i = -1, n = features.length;
    while (++i < n) extension_streamGeometry(features[i].geometry, stream);
  }
};

var extension_streamGeometryType = {
  Sphere: function(object, stream) {
    stream.sphere();
  },
  Point: function(object, stream) {
    object = object.coordinates;
    stream.point(object[0], object[1], object[2]);
  },
  MultiPoint: function(object, stream) {
    var coordinates = object.coordinates, i = -1, n = coordinates.length;
    while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);
  },
  LineString: function(object, stream) {
    extension_streamLine(object.coordinates, stream, 0);
  },
  MultiLineString: function(object, stream) {
    var coordinates = object.coordinates, i = -1, n = coordinates.length;
    while (++i < n) extension_streamLine(coordinates[i], stream, 0);
  },
  Polygon: function(object, stream) {
    extension_streamPolygon(object.coordinates, stream);
  },
  MultiPolygon: function(object, stream) {
    var coordinates = object.coordinates, i = -1, n = coordinates.length;
    while (++i < n) extension_streamPolygon(coordinates[i], stream);
  },
  GeometryCollection: function(object, stream) {
    var geometries = object.geometries, i = -1, n = geometries.length;
    while (++i < n) extension_streamGeometry(geometries[i], stream);
  }
};

function extension_streamLine(coordinates, stream, closed) {
  var i = -1, n = coordinates.length - closed, coordinate;
  stream.lineStart();
  while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
  stream.lineEnd();
}

function extension_streamPolygon(coordinates, stream) {
  var i = -1, n = coordinates.length;
  stream.polygonStart();
  while (++i < n) extension_streamLine(coordinates[i], stream, 1);
  stream.polygonEnd();
}

/* harmony default export */ function extension_src_stream(object, stream) {
  if (object && extension_streamObjectType.hasOwnProperty(object.type)) {
    extension_streamObjectType[object.type](object, stream);
  } else {
    extension_streamGeometry(object, stream);
  }
}

;// ../../node_modules/d3-array/src/fsum.js
// https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
class extension_Adder {
  constructor() {
    this._partials = new Float64Array(32);
    this._n = 0;
  }
  add(x) {
    const p = this._partials;
    let i = 0;
    for (let j = 0; j < this._n && j < 32; j++) {
      const y = p[j],
        hi = x + y,
        lo = Math.abs(x) < Math.abs(y) ? x - (hi - y) : y - (hi - x);
      if (lo) p[i++] = lo;
      x = hi;
    }
    p[i] = x;
    this._n = i + 1;
    return this;
  }
  valueOf() {
    const p = this._partials;
    let n = this._n, x, y, lo, hi = 0;
    if (n > 0) {
      hi = p[--n];
      while (n > 0) {
        x = hi;
        y = p[--n];
        hi = x + y;
        lo = y - (hi - x);
        if (lo) break;
      }
      if (n > 0 && ((lo < 0 && p[n - 1] < 0) || (lo > 0 && p[n - 1] > 0))) {
        y = lo * 2;
        x = hi + y;
        if (y == x - hi) hi = x;
      }
    }
    return hi;
  }
}

function extension_fsum(values, valueof) {
  const adder = new extension_Adder();
  if (valueof === undefined) {
    for (let value of values) {
      if (value = +value) {
        adder.add(value);
      }
    }
  } else {
    let index = -1;
    for (let value of values) {
      if (value = +valueof(value, ++index, values)) {
        adder.add(value);
      }
    }
  }
  return +adder;
}

function extension_fcumsum(values, valueof) {
  const adder = new extension_Adder();
  let index = -1;
  return Float64Array.from(values, valueof === undefined
      ? v => adder.add(+v || 0)
      : v => adder.add(+valueof(v, ++index, values) || 0)
  );
}

;// ../../node_modules/d3-geo/src/math.js
var extension_src_math_epsilon = 1e-6;
var extension_math_epsilon2 = 1e-12;
var extension_math_pi = Math.PI;
var extension_math_halfPi = extension_math_pi / 2;
var extension_quarterPi = extension_math_pi / 4;
var extension_math_tau = extension_math_pi * 2;

var extension_src_math_degrees = 180 / extension_math_pi;
var extension_src_math_radians = extension_math_pi / 180;

var extension_math_abs = Math.abs;
var extension_atan = Math.atan;
var extension_math_atan2 = Math.atan2;
var extension_math_cos = Math.cos;
var extension_ceil = Math.ceil;
var extension_math_exp = Math.exp;
var extension_math_floor = Math.floor;
var extension_hypot = Math.hypot;
var extension_math_log = Math.log;
var extension_math_pow = Math.pow;
var extension_math_sin = Math.sin;
var extension_math_sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
var extension_math_sqrt = Math.sqrt;
var extension_tan = Math.tan;

function extension_math_acos(x) {
  return x > 1 ? 0 : x < -1 ? extension_math_pi : Math.acos(x);
}

function extension_math_asin(x) {
  return x > 1 ? extension_math_halfPi : x < -1 ? -extension_math_halfPi : Math.asin(x);
}

function extension_haversin(x) {
  return (x = extension_math_sin(x / 2)) * x;
}

;// ../../node_modules/d3-geo/src/noop.js
function extension_noop_noop() {}

;// ../../node_modules/d3-geo/src/path/area.js




var extension_areaSum = new extension_Adder(),
    extension_areaRingSum = new extension_Adder(),
    extension_x00,
    extension_y00,
    extension_x0,
    extension_y0;

var extension_areaStream = {
  point: extension_noop_noop,
  lineStart: extension_noop_noop,
  lineEnd: extension_noop_noop,
  polygonStart: function() {
    extension_areaStream.lineStart = extension_areaRingStart;
    extension_areaStream.lineEnd = extension_areaRingEnd;
  },
  polygonEnd: function() {
    extension_areaStream.lineStart = extension_areaStream.lineEnd = extension_areaStream.point = extension_noop_noop;
    extension_areaSum.add(extension_math_abs(extension_areaRingSum));
    extension_areaRingSum = new extension_Adder();
  },
  result: function() {
    var area = extension_areaSum / 2;
    extension_areaSum = new extension_Adder();
    return area;
  }
};

function extension_areaRingStart() {
  extension_areaStream.point = extension_areaPointFirst;
}

function extension_areaPointFirst(x, y) {
  extension_areaStream.point = extension_areaPoint;
  extension_x00 = extension_x0 = x, extension_y00 = extension_y0 = y;
}

function extension_areaPoint(x, y) {
  extension_areaRingSum.add(extension_y0 * x - extension_x0 * y);
  extension_x0 = x, extension_y0 = y;
}

function extension_areaRingEnd() {
  extension_areaPoint(extension_x00, extension_y00);
}

/* harmony default export */ const extension_path_area = (extension_areaStream);

;// ../../node_modules/d3-geo/src/path/bounds.js


var extension_bounds_x0 = Infinity,
    extension_bounds_y0 = extension_bounds_x0,
    extension_x1 = -extension_bounds_x0,
    extension_y1 = extension_x1;

var extension_boundsStream = {
  point: extension_boundsPoint,
  lineStart: extension_noop_noop,
  lineEnd: extension_noop_noop,
  polygonStart: extension_noop_noop,
  polygonEnd: extension_noop_noop,
  result: function() {
    var bounds = [[extension_bounds_x0, extension_bounds_y0], [extension_x1, extension_y1]];
    extension_x1 = extension_y1 = -(extension_bounds_y0 = extension_bounds_x0 = Infinity);
    return bounds;
  }
};

function extension_boundsPoint(x, y) {
  if (x < extension_bounds_x0) extension_bounds_x0 = x;
  if (x > extension_x1) extension_x1 = x;
  if (y < extension_bounds_y0) extension_bounds_y0 = y;
  if (y > extension_y1) extension_y1 = y;
}

/* harmony default export */ const extension_path_bounds = (extension_boundsStream);

;// ../../node_modules/d3-geo/src/path/centroid.js


// TODO Enforce positive area for exterior, negative area for interior?

var extension_X0 = 0,
    extension_Y0 = 0,
    extension_Z0 = 0,
    extension_X1 = 0,
    extension_Y1 = 0,
    extension_Z1 = 0,
    extension_X2 = 0,
    extension_Y2 = 0,
    extension_Z2 = 0,
    extension_centroid_x00,
    extension_centroid_y00,
    extension_centroid_x0,
    extension_centroid_y0;

var extension_centroidStream = {
  point: extension_centroidPoint,
  lineStart: extension_centroidLineStart,
  lineEnd: extension_centroidLineEnd,
  polygonStart: function() {
    extension_centroidStream.lineStart = extension_centroidRingStart;
    extension_centroidStream.lineEnd = extension_centroidRingEnd;
  },
  polygonEnd: function() {
    extension_centroidStream.point = extension_centroidPoint;
    extension_centroidStream.lineStart = extension_centroidLineStart;
    extension_centroidStream.lineEnd = extension_centroidLineEnd;
  },
  result: function() {
    var centroid = extension_Z2 ? [extension_X2 / extension_Z2, extension_Y2 / extension_Z2]
        : extension_Z1 ? [extension_X1 / extension_Z1, extension_Y1 / extension_Z1]
        : extension_Z0 ? [extension_X0 / extension_Z0, extension_Y0 / extension_Z0]
        : [NaN, NaN];
    extension_X0 = extension_Y0 = extension_Z0 =
    extension_X1 = extension_Y1 = extension_Z1 =
    extension_X2 = extension_Y2 = extension_Z2 = 0;
    return centroid;
  }
};

function extension_centroidPoint(x, y) {
  extension_X0 += x;
  extension_Y0 += y;
  ++extension_Z0;
}

function extension_centroidLineStart() {
  extension_centroidStream.point = extension_centroidPointFirstLine;
}

function extension_centroidPointFirstLine(x, y) {
  extension_centroidStream.point = extension_centroidPointLine;
  extension_centroidPoint(extension_centroid_x0 = x, extension_centroid_y0 = y);
}

function extension_centroidPointLine(x, y) {
  var dx = x - extension_centroid_x0, dy = y - extension_centroid_y0, z = extension_math_sqrt(dx * dx + dy * dy);
  extension_X1 += z * (extension_centroid_x0 + x) / 2;
  extension_Y1 += z * (extension_centroid_y0 + y) / 2;
  extension_Z1 += z;
  extension_centroidPoint(extension_centroid_x0 = x, extension_centroid_y0 = y);
}

function extension_centroidLineEnd() {
  extension_centroidStream.point = extension_centroidPoint;
}

function extension_centroidRingStart() {
  extension_centroidStream.point = extension_centroidPointFirstRing;
}

function extension_centroidRingEnd() {
  extension_centroidPointRing(extension_centroid_x00, extension_centroid_y00);
}

function extension_centroidPointFirstRing(x, y) {
  extension_centroidStream.point = extension_centroidPointRing;
  extension_centroidPoint(extension_centroid_x00 = extension_centroid_x0 = x, extension_centroid_y00 = extension_centroid_y0 = y);
}

function extension_centroidPointRing(x, y) {
  var dx = x - extension_centroid_x0,
      dy = y - extension_centroid_y0,
      z = extension_math_sqrt(dx * dx + dy * dy);

  extension_X1 += z * (extension_centroid_x0 + x) / 2;
  extension_Y1 += z * (extension_centroid_y0 + y) / 2;
  extension_Z1 += z;

  z = extension_centroid_y0 * x - extension_centroid_x0 * y;
  extension_X2 += z * (extension_centroid_x0 + x);
  extension_Y2 += z * (extension_centroid_y0 + y);
  extension_Z2 += z * 3;
  extension_centroidPoint(extension_centroid_x0 = x, extension_centroid_y0 = y);
}

/* harmony default export */ const extension_centroid = (extension_centroidStream);

;// ../../node_modules/d3-geo/src/path/context.js



function extension_PathContext(context) {
  this._context = context;
}

extension_PathContext.prototype = {
  _radius: 4.5,
  pointRadius: function(_) {
    return this._radius = _, this;
  },
  polygonStart: function() {
    this._line = 0;
  },
  polygonEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._point = 0;
  },
  lineEnd: function() {
    if (this._line === 0) this._context.closePath();
    this._point = NaN;
  },
  point: function(x, y) {
    switch (this._point) {
      case 0: {
        this._context.moveTo(x, y);
        this._point = 1;
        break;
      }
      case 1: {
        this._context.lineTo(x, y);
        break;
      }
      default: {
        this._context.moveTo(x + this._radius, y);
        this._context.arc(x, y, this._radius, 0, extension_math_tau);
        break;
      }
    }
  },
  result: extension_noop_noop
};

;// ../../node_modules/d3-geo/src/path/measure.js




var extension_lengthSum = new extension_Adder(),
    extension_lengthRing,
    extension_measure_x00,
    extension_measure_y00,
    extension_measure_x0,
    extension_measure_y0;

var extension_lengthStream = {
  point: extension_noop_noop,
  lineStart: function() {
    extension_lengthStream.point = extension_lengthPointFirst;
  },
  lineEnd: function() {
    if (extension_lengthRing) extension_lengthPoint(extension_measure_x00, extension_measure_y00);
    extension_lengthStream.point = extension_noop_noop;
  },
  polygonStart: function() {
    extension_lengthRing = true;
  },
  polygonEnd: function() {
    extension_lengthRing = null;
  },
  result: function() {
    var length = +extension_lengthSum;
    extension_lengthSum = new extension_Adder();
    return length;
  }
};

function extension_lengthPointFirst(x, y) {
  extension_lengthStream.point = extension_lengthPoint;
  extension_measure_x00 = extension_measure_x0 = x, extension_measure_y00 = extension_measure_y0 = y;
}

function extension_lengthPoint(x, y) {
  extension_measure_x0 -= x, extension_measure_y0 -= y;
  extension_lengthSum.add(extension_math_sqrt(extension_measure_x0 * extension_measure_x0 + extension_measure_y0 * extension_measure_y0));
  extension_measure_x0 = x, extension_measure_y0 = y;
}

/* harmony default export */ const extension_path_measure = (extension_lengthStream);

;// ../../node_modules/d3-geo/src/path/string.js
// Simple caching for constant-radius points.
let extension_cacheDigits, extension_cacheAppend, extension_cacheRadius, extension_cacheCircle;

class extension_PathString {
  constructor(digits) {
    this._append = digits == null ? extension_string_append : extension_string_appendRound(digits);
    this._radius = 4.5;
    this._ = "";
  }
  pointRadius(_) {
    this._radius = +_;
    return this;
  }
  polygonStart() {
    this._line = 0;
  }
  polygonEnd() {
    this._line = NaN;
  }
  lineStart() {
    this._point = 0;
  }
  lineEnd() {
    if (this._line === 0) this._ += "Z";
    this._point = NaN;
  }
  point(x, y) {
    switch (this._point) {
      case 0: {
        this._append`M${x},${y}`;
        this._point = 1;
        break;
      }
      case 1: {
        this._append`L${x},${y}`;
        break;
      }
      default: {
        this._append`M${x},${y}`;
        if (this._radius !== extension_cacheRadius || this._append !== extension_cacheAppend) {
          const r = this._radius;
          const s = this._;
          this._ = ""; // stash the old string so we can cache the circle path fragment
          this._append`m0,${r}a${r},${r} 0 1,1 0,${-2 * r}a${r},${r} 0 1,1 0,${2 * r}z`;
          extension_cacheRadius = r;
          extension_cacheAppend = this._append;
          extension_cacheCircle = this._;
          this._ = s;
        }
        this._ += extension_cacheCircle;
        break;
      }
    }
  }
  result() {
    const result = this._;
    this._ = "";
    return result.length ? result : null;
  }
}

function extension_string_append(strings) {
  let i = 1;
  this._ += strings[0];
  for (const j = strings.length; i < j; ++i) {
    this._ += arguments[i] + strings[i];
  }
}

function extension_string_appendRound(digits) {
  const d = Math.floor(digits);
  if (!(d >= 0)) throw new RangeError(`invalid digits: ${digits}`);
  if (d > 15) return extension_string_append;
  if (d !== extension_cacheDigits) {
    const k = 10 ** d;
    extension_cacheDigits = d;
    extension_cacheAppend = function append(strings) {
      let i = 1;
      this._ += strings[0];
      for (const j = strings.length; i < j; ++i) {
        this._ += Math.round(arguments[i] * k) / k + strings[i];
      }
    };
  }
  return extension_cacheAppend;
}

;// ../../node_modules/d3-geo/src/path/index.js









/* harmony default export */ function extension_src_path(projection, context) {
  let digits = 3,
      pointRadius = 4.5,
      projectionStream,
      contextStream;

  function path(object) {
    if (object) {
      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
      extension_src_stream(object, projectionStream(contextStream));
    }
    return contextStream.result();
  }

  path.area = function(object) {
    extension_src_stream(object, projectionStream(extension_path_area));
    return extension_path_area.result();
  };

  path.measure = function(object) {
    extension_src_stream(object, projectionStream(extension_path_measure));
    return extension_path_measure.result();
  };

  path.bounds = function(object) {
    extension_src_stream(object, projectionStream(extension_path_bounds));
    return extension_path_bounds.result();
  };

  path.centroid = function(object) {
    extension_src_stream(object, projectionStream(extension_centroid));
    return extension_centroid.result();
  };

  path.projection = function(_) {
    if (!arguments.length) return projection;
    projectionStream = _ == null ? (projection = null, extension_d3_geo_src_identity) : (projection = _).stream;
    return path;
  };

  path.context = function(_) {
    if (!arguments.length) return context;
    contextStream = _ == null ? (context = null, new extension_PathString(digits)) : new extension_PathContext(context = _);
    if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
    return path;
  };

  path.pointRadius = function(_) {
    if (!arguments.length) return pointRadius;
    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
    return path;
  };

  path.digits = function(_) {
    if (!arguments.length) return digits;
    if (_ == null) digits = null;
    else {
      const d = Math.floor(_);
      if (!(d >= 0)) throw new RangeError(`invalid digits: ${_}`);
      digits = d;
    }
    if (context === null) contextStream = new extension_PathString(digits);
    return path;
  };

  return path.projection(projection).digits(digits).context(context);
}

;// ../../node_modules/d3-geo/src/clip/buffer.js


/* harmony default export */ function extension_buffer() {
  var lines = [],
      line;
  return {
    point: function(x, y, m) {
      line.push([x, y, m]);
    },
    lineStart: function() {
      lines.push(line = []);
    },
    lineEnd: extension_noop_noop,
    rejoin: function() {
      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
    },
    result: function() {
      var result = lines;
      lines = [];
      line = null;
      return result;
    }
  };
}

;// ../../node_modules/d3-geo/src/pointEqual.js


/* harmony default export */ function extension_pointEqual(a, b) {
  return extension_math_abs(a[0] - b[0]) < extension_src_math_epsilon && extension_math_abs(a[1] - b[1]) < extension_src_math_epsilon;
}

;// ../../node_modules/d3-geo/src/clip/rejoin.js



function extension_Intersection(point, points, other, entry) {
  this.x = point;
  this.z = points;
  this.o = other; // another intersection
  this.e = entry; // is an entry?
  this.v = false; // visited
  this.n = this.p = null; // next & previous
}

// A generalized polygon clipping algorithm: given a polygon that has been cut
// into its visible line segments, and rejoins the segments by interpolating
// along the clip edge.
/* harmony default export */ function extension_rejoin(segments, compareIntersection, startInside, interpolate, stream) {
  var subject = [],
      clip = [],
      i,
      n;

  segments.forEach(function(segment) {
    if ((n = segment.length - 1) <= 0) return;
    var n, p0 = segment[0], p1 = segment[n], x;

    if (extension_pointEqual(p0, p1)) {
      if (!p0[2] && !p1[2]) {
        stream.lineStart();
        for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);
        stream.lineEnd();
        return;
      }
      // handle degenerate cases by moving the point
      p1[0] += 2 * extension_src_math_epsilon;
    }

    subject.push(x = new extension_Intersection(p0, segment, null, true));
    clip.push(x.o = new extension_Intersection(p0, null, x, false));
    subject.push(x = new extension_Intersection(p1, segment, null, false));
    clip.push(x.o = new extension_Intersection(p1, null, x, true));
  });

  if (!subject.length) return;

  clip.sort(compareIntersection);
  extension_rejoin_link(subject);
  extension_rejoin_link(clip);

  for (i = 0, n = clip.length; i < n; ++i) {
    clip[i].e = startInside = !startInside;
  }

  var start = subject[0],
      points,
      point;

  while (1) {
    // Find first unvisited intersection.
    var current = start,
        isSubject = true;
    while (current.v) if ((current = current.n) === start) return;
    points = current.z;
    stream.lineStart();
    do {
      current.v = current.o.v = true;
      if (current.e) {
        if (isSubject) {
          for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);
        } else {
          interpolate(current.x, current.n.x, 1, stream);
        }
        current = current.n;
      } else {
        if (isSubject) {
          points = current.p.z;
          for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);
        } else {
          interpolate(current.x, current.p.x, -1, stream);
        }
        current = current.p;
      }
      current = current.o;
      points = current.z;
      isSubject = !isSubject;
    } while (!current.v);
    stream.lineEnd();
  }
}

function extension_rejoin_link(array) {
  if (!(n = array.length)) return;
  var n,
      i = 0,
      a = array[0],
      b;
  while (++i < n) {
    a.n = b = array[i];
    b.p = a;
    a = b;
  }
  a.n = b = array[0];
  b.p = a;
}

;// ../../node_modules/d3-geo/src/cartesian.js


function extension_spherical(cartesian) {
  return [extension_math_atan2(cartesian[1], cartesian[0]), extension_math_asin(cartesian[2])];
}

function extension_cartesian_cartesian(spherical) {
  var lambda = spherical[0], phi = spherical[1], cosPhi = extension_math_cos(phi);
  return [cosPhi * extension_math_cos(lambda), cosPhi * extension_math_sin(lambda), extension_math_sin(phi)];
}

function extension_cartesianDot(a, b) {
  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}

function extension_cartesianCross(a, b) {
  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
}

// TODO return a
function extension_cartesianAddInPlace(a, b) {
  a[0] += b[0], a[1] += b[1], a[2] += b[2];
}

function extension_cartesianScale(vector, k) {
  return [vector[0] * k, vector[1] * k, vector[2] * k];
}

// TODO return d
function extension_cartesianNormalizeInPlace(d) {
  var l = extension_math_sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
  d[0] /= l, d[1] /= l, d[2] /= l;
}

;// ../../node_modules/d3-geo/src/polygonContains.js




function extension_longitude(point) {
  return extension_math_abs(point[0]) <= extension_math_pi ? point[0] : extension_math_sign(point[0]) * ((extension_math_abs(point[0]) + extension_math_pi) % extension_math_tau - extension_math_pi);
}

/* harmony default export */ function extension_polygonContains(polygon, point) {
  var lambda = extension_longitude(point),
      phi = point[1],
      sinPhi = extension_math_sin(phi),
      normal = [extension_math_sin(lambda), -extension_math_cos(lambda), 0],
      angle = 0,
      winding = 0;

  var sum = new extension_Adder();

  if (sinPhi === 1) phi = extension_math_halfPi + extension_src_math_epsilon;
  else if (sinPhi === -1) phi = -extension_math_halfPi - extension_src_math_epsilon;

  for (var i = 0, n = polygon.length; i < n; ++i) {
    if (!(m = (ring = polygon[i]).length)) continue;
    var ring,
        m,
        point0 = ring[m - 1],
        lambda0 = extension_longitude(point0),
        phi0 = point0[1] / 2 + extension_quarterPi,
        sinPhi0 = extension_math_sin(phi0),
        cosPhi0 = extension_math_cos(phi0);

    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
      var point1 = ring[j],
          lambda1 = extension_longitude(point1),
          phi1 = point1[1] / 2 + extension_quarterPi,
          sinPhi1 = extension_math_sin(phi1),
          cosPhi1 = extension_math_cos(phi1),
          delta = lambda1 - lambda0,
          sign = delta >= 0 ? 1 : -1,
          absDelta = sign * delta,
          antimeridian = absDelta > extension_math_pi,
          k = sinPhi0 * sinPhi1;

      sum.add(extension_math_atan2(k * sign * extension_math_sin(absDelta), cosPhi0 * cosPhi1 + k * extension_math_cos(absDelta)));
      angle += antimeridian ? delta + sign * extension_math_tau : delta;

      // Are the longitudes either side of the point’s meridian (lambda),
      // and are the latitudes smaller than the parallel (phi)?
      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
        var arc = extension_cartesianCross(extension_cartesian_cartesian(point0), extension_cartesian_cartesian(point1));
        extension_cartesianNormalizeInPlace(arc);
        var intersection = extension_cartesianCross(normal, arc);
        extension_cartesianNormalizeInPlace(intersection);
        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * extension_math_asin(intersection[2]);
        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
          winding += antimeridian ^ delta >= 0 ? 1 : -1;
        }
      }
    }
  }

  // First, determine whether the South pole is inside or outside:
  //
  // It is inside if:
  // * the polygon winds around it in a clockwise direction.
  // * the polygon does not (cumulatively) wind around it, but has a negative
  //   (counter-clockwise) area.
  //
  // Second, count the (signed) number of times a segment crosses a lambda
  // from the point to the South pole.  If it is zero, then the point is the
  // same side as the South pole.

  return (angle < -extension_src_math_epsilon || angle < extension_src_math_epsilon && sum < -extension_math_epsilon2) ^ (winding & 1);
}

;// ../../node_modules/d3-array/src/merge.js
function* extension_merge_flatten(arrays) {
  for (const array of arrays) {
    yield* array;
  }
}

function extension_merge_merge(arrays) {
  return Array.from(extension_merge_flatten(arrays));
}

;// ../../node_modules/d3-geo/src/clip/index.js






/* harmony default export */ function extension_src_clip(pointVisible, clipLine, interpolate, start) {
  return function(sink) {
    var line = clipLine(sink),
        ringBuffer = extension_buffer(),
        ringSink = clipLine(ringBuffer),
        polygonStarted = false,
        polygon,
        segments,
        ring;

    var clip = {
      point: point,
      lineStart: lineStart,
      lineEnd: lineEnd,
      polygonStart: function() {
        clip.point = pointRing;
        clip.lineStart = ringStart;
        clip.lineEnd = ringEnd;
        segments = [];
        polygon = [];
      },
      polygonEnd: function() {
        clip.point = point;
        clip.lineStart = lineStart;
        clip.lineEnd = lineEnd;
        segments = extension_merge_merge(segments);
        var startInside = extension_polygonContains(polygon, start);
        if (segments.length) {
          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
          extension_rejoin(segments, extension_compareIntersection, startInside, interpolate, sink);
        } else if (startInside) {
          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
          sink.lineStart();
          interpolate(null, null, 1, sink);
          sink.lineEnd();
        }
        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
        segments = polygon = null;
      },
      sphere: function() {
        sink.polygonStart();
        sink.lineStart();
        interpolate(null, null, 1, sink);
        sink.lineEnd();
        sink.polygonEnd();
      }
    };

    function point(lambda, phi) {
      if (pointVisible(lambda, phi)) sink.point(lambda, phi);
    }

    function pointLine(lambda, phi) {
      line.point(lambda, phi);
    }

    function lineStart() {
      clip.point = pointLine;
      line.lineStart();
    }

    function lineEnd() {
      clip.point = point;
      line.lineEnd();
    }

    function pointRing(lambda, phi) {
      ring.push([lambda, phi]);
      ringSink.point(lambda, phi);
    }

    function ringStart() {
      ringSink.lineStart();
      ring = [];
    }

    function ringEnd() {
      pointRing(ring[0][0], ring[0][1]);
      ringSink.lineEnd();

      var clean = ringSink.clean(),
          ringSegments = ringBuffer.result(),
          i, n = ringSegments.length, m,
          segment,
          point;

      ring.pop();
      polygon.push(ring);
      ring = null;

      if (!n) return;

      // No intersections.
      if (clean & 1) {
        segment = ringSegments[0];
        if ((m = segment.length - 1) > 0) {
          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
          sink.lineStart();
          for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);
          sink.lineEnd();
        }
        return;
      }

      // Rejoin connected segments.
      // TODO reuse ringBuffer.rejoin()?
      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));

      segments.push(ringSegments.filter(extension_validSegment));
    }

    return clip;
  };
}

function extension_validSegment(segment) {
  return segment.length > 1;
}

// Intersections are sorted along the clip edge. For both antimeridian cutting
// and circle clipping, the same comparison is used.
function extension_compareIntersection(a, b) {
  return ((a = a.x)[0] < 0 ? a[1] - extension_math_halfPi - extension_src_math_epsilon : extension_math_halfPi - a[1])
       - ((b = b.x)[0] < 0 ? b[1] - extension_math_halfPi - extension_src_math_epsilon : extension_math_halfPi - b[1]);
}

;// ../../node_modules/d3-geo/src/clip/antimeridian.js



/* harmony default export */ const extension_antimeridian = (extension_src_clip(
  function() { return true; },
  extension_clipAntimeridianLine,
  extension_clipAntimeridianInterpolate,
  [-extension_math_pi, -extension_math_halfPi]
));

// Takes a line and cuts into visible segments. Return values: 0 - there were
// intersections or the line was empty; 1 - no intersections; 2 - there were
// intersections, and the first and last segments should be rejoined.
function extension_clipAntimeridianLine(stream) {
  var lambda0 = NaN,
      phi0 = NaN,
      sign0 = NaN,
      clean; // no intersections

  return {
    lineStart: function() {
      stream.lineStart();
      clean = 1;
    },
    point: function(lambda1, phi1) {
      var sign1 = lambda1 > 0 ? extension_math_pi : -extension_math_pi,
          delta = extension_math_abs(lambda1 - lambda0);
      if (extension_math_abs(delta - extension_math_pi) < extension_src_math_epsilon) { // line crosses a pole
        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? extension_math_halfPi : -extension_math_halfPi);
        stream.point(sign0, phi0);
        stream.lineEnd();
        stream.lineStart();
        stream.point(sign1, phi0);
        stream.point(lambda1, phi0);
        clean = 0;
      } else if (sign0 !== sign1 && delta >= extension_math_pi) { // line crosses antimeridian
        if (extension_math_abs(lambda0 - sign0) < extension_src_math_epsilon) lambda0 -= sign0 * extension_src_math_epsilon; // handle degeneracies
        if (extension_math_abs(lambda1 - sign1) < extension_src_math_epsilon) lambda1 -= sign1 * extension_src_math_epsilon;
        phi0 = extension_clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
        stream.point(sign0, phi0);
        stream.lineEnd();
        stream.lineStart();
        stream.point(sign1, phi0);
        clean = 0;
      }
      stream.point(lambda0 = lambda1, phi0 = phi1);
      sign0 = sign1;
    },
    lineEnd: function() {
      stream.lineEnd();
      lambda0 = phi0 = NaN;
    },
    clean: function() {
      return 2 - clean; // if intersections, rejoin first and last segments
    }
  };
}

function extension_clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
  var cosPhi0,
      cosPhi1,
      sinLambda0Lambda1 = extension_math_sin(lambda0 - lambda1);
  return extension_math_abs(sinLambda0Lambda1) > extension_src_math_epsilon
      ? extension_atan((extension_math_sin(phi0) * (cosPhi1 = extension_math_cos(phi1)) * extension_math_sin(lambda1)
          - extension_math_sin(phi1) * (cosPhi0 = extension_math_cos(phi0)) * extension_math_sin(lambda0))
          / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
      : (phi0 + phi1) / 2;
}

function extension_clipAntimeridianInterpolate(from, to, direction, stream) {
  var phi;
  if (from == null) {
    phi = direction * extension_math_halfPi;
    stream.point(-extension_math_pi, phi);
    stream.point(0, phi);
    stream.point(extension_math_pi, phi);
    stream.point(extension_math_pi, 0);
    stream.point(extension_math_pi, -phi);
    stream.point(0, -phi);
    stream.point(-extension_math_pi, -phi);
    stream.point(-extension_math_pi, 0);
    stream.point(-extension_math_pi, phi);
  } else if (extension_math_abs(from[0] - to[0]) > extension_src_math_epsilon) {
    var lambda = from[0] < to[0] ? extension_math_pi : -extension_math_pi;
    phi = direction * lambda / 2;
    stream.point(-lambda, phi);
    stream.point(0, phi);
    stream.point(lambda, phi);
  } else {
    stream.point(to[0], to[1]);
  }
}

;// ../../node_modules/d3-geo/src/circle.js





// Generates a circle centered at [0°, 0°], with a given radius and precision.
function extension_circleStream(stream, radius, delta, direction, t0, t1) {
  if (!delta) return;
  var cosRadius = extension_math_cos(radius),
      sinRadius = extension_math_sin(radius),
      step = direction * delta;
  if (t0 == null) {
    t0 = radius + direction * extension_math_tau;
    t1 = radius - step / 2;
  } else {
    t0 = extension_circleRadius(cosRadius, t0);
    t1 = extension_circleRadius(cosRadius, t1);
    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * extension_math_tau;
  }
  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
    point = extension_spherical([cosRadius, -sinRadius * extension_math_cos(t), -sinRadius * extension_math_sin(t)]);
    stream.point(point[0], point[1]);
  }
}

// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
function extension_circleRadius(cosRadius, point) {
  point = extension_cartesian_cartesian(point), point[0] -= cosRadius;
  extension_cartesianNormalizeInPlace(point);
  var radius = extension_math_acos(-point[1]);
  return ((-point[2] < 0 ? -radius : radius) + extension_math_tau - extension_src_math_epsilon) % extension_math_tau;
}

/* harmony default export */ function extension_src_circle() {
  var center = constant([0, 0]),
      radius = constant(90),
      precision = constant(2),
      ring,
      rotate,
      stream = {point: point};

  function point(x, y) {
    ring.push(x = rotate(x, y));
    x[0] *= degrees, x[1] *= degrees;
  }

  function circle() {
    var c = center.apply(this, arguments),
        r = radius.apply(this, arguments) * radians,
        p = precision.apply(this, arguments) * radians;
    ring = [];
    rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;
    extension_circleStream(stream, r, p, 1);
    c = {type: "Polygon", coordinates: [ring]};
    ring = rotate = null;
    return c;
  }

  circle.center = function(_) {
    return arguments.length ? (center = typeof _ === "function" ? _ : constant([+_[0], +_[1]]), circle) : center;
  };

  circle.radius = function(_) {
    return arguments.length ? (radius = typeof _ === "function" ? _ : constant(+_), circle) : radius;
  };

  circle.precision = function(_) {
    return arguments.length ? (precision = typeof _ === "function" ? _ : constant(+_), circle) : precision;
  };

  return circle;
}

;// ../../node_modules/d3-geo/src/clip/circle.js






/* harmony default export */ function extension_clip_circle(radius) {
  var cr = extension_math_cos(radius),
      delta = 2 * extension_src_math_radians,
      smallRadius = cr > 0,
      notHemisphere = extension_math_abs(cr) > extension_src_math_epsilon; // TODO optimise for this common case

  function interpolate(from, to, direction, stream) {
    extension_circleStream(stream, radius, delta, direction, from, to);
  }

  function visible(lambda, phi) {
    return extension_math_cos(lambda) * extension_math_cos(phi) > cr;
  }

  // Takes a line and cuts into visible segments. Return values used for polygon
  // clipping: 0 - there were intersections or the line was empty; 1 - no
  // intersections 2 - there were intersections, and the first and last segments
  // should be rejoined.
  function clipLine(stream) {
    var point0, // previous point
        c0, // code for previous point
        v0, // visibility of previous point
        v00, // visibility of first point
        clean; // no intersections
    return {
      lineStart: function() {
        v00 = v0 = false;
        clean = 1;
      },
      point: function(lambda, phi) {
        var point1 = [lambda, phi],
            point2,
            v = visible(lambda, phi),
            c = smallRadius
              ? v ? 0 : code(lambda, phi)
              : v ? code(lambda + (lambda < 0 ? extension_math_pi : -extension_math_pi), phi) : 0;
        if (!point0 && (v00 = v0 = v)) stream.lineStart();
        if (v !== v0) {
          point2 = intersect(point0, point1);
          if (!point2 || extension_pointEqual(point0, point2) || extension_pointEqual(point1, point2))
            point1[2] = 1;
        }
        if (v !== v0) {
          clean = 0;
          if (v) {
            // outside going in
            stream.lineStart();
            point2 = intersect(point1, point0);
            stream.point(point2[0], point2[1]);
          } else {
            // inside going out
            point2 = intersect(point0, point1);
            stream.point(point2[0], point2[1], 2);
            stream.lineEnd();
          }
          point0 = point2;
        } else if (notHemisphere && point0 && smallRadius ^ v) {
          var t;
          // If the codes for two points are different, or are both zero,
          // and there this segment intersects with the small circle.
          if (!(c & c0) && (t = intersect(point1, point0, true))) {
            clean = 0;
            if (smallRadius) {
              stream.lineStart();
              stream.point(t[0][0], t[0][1]);
              stream.point(t[1][0], t[1][1]);
              stream.lineEnd();
            } else {
              stream.point(t[1][0], t[1][1]);
              stream.lineEnd();
              stream.lineStart();
              stream.point(t[0][0], t[0][1], 3);
            }
          }
        }
        if (v && (!point0 || !extension_pointEqual(point0, point1))) {
          stream.point(point1[0], point1[1]);
        }
        point0 = point1, v0 = v, c0 = c;
      },
      lineEnd: function() {
        if (v0) stream.lineEnd();
        point0 = null;
      },
      // Rejoin first and last segments if there were intersections and the first
      // and last points were visible.
      clean: function() {
        return clean | ((v00 && v0) << 1);
      }
    };
  }

  // Intersects the great circle between a and b with the clip circle.
  function intersect(a, b, two) {
    var pa = extension_cartesian_cartesian(a),
        pb = extension_cartesian_cartesian(b);

    // We have two planes, n1.p = d1 and n2.p = d2.
    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
    var n1 = [1, 0, 0], // normal
        n2 = extension_cartesianCross(pa, pb),
        n2n2 = extension_cartesianDot(n2, n2),
        n1n2 = n2[0], // cartesianDot(n1, n2),
        determinant = n2n2 - n1n2 * n1n2;

    // Two polar points.
    if (!determinant) return !two && a;

    var c1 =  cr * n2n2 / determinant,
        c2 = -cr * n1n2 / determinant,
        n1xn2 = extension_cartesianCross(n1, n2),
        A = extension_cartesianScale(n1, c1),
        B = extension_cartesianScale(n2, c2);
    extension_cartesianAddInPlace(A, B);

    // Solve |p(t)|^2 = 1.
    var u = n1xn2,
        w = extension_cartesianDot(A, u),
        uu = extension_cartesianDot(u, u),
        t2 = w * w - uu * (extension_cartesianDot(A, A) - 1);

    if (t2 < 0) return;

    var t = extension_math_sqrt(t2),
        q = extension_cartesianScale(u, (-w - t) / uu);
    extension_cartesianAddInPlace(q, A);
    q = extension_spherical(q);

    if (!two) return q;

    // Two intersection points.
    var lambda0 = a[0],
        lambda1 = b[0],
        phi0 = a[1],
        phi1 = b[1],
        z;

    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;

    var delta = lambda1 - lambda0,
        polar = extension_math_abs(delta - extension_math_pi) < extension_src_math_epsilon,
        meridian = polar || delta < extension_src_math_epsilon;

    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;

    // Check that the first point is between a and b.
    if (meridian
        ? polar
          ? phi0 + phi1 > 0 ^ q[1] < (extension_math_abs(q[0] - lambda0) < extension_src_math_epsilon ? phi0 : phi1)
          : phi0 <= q[1] && q[1] <= phi1
        : delta > extension_math_pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
      var q1 = extension_cartesianScale(u, (-w + t) / uu);
      extension_cartesianAddInPlace(q1, A);
      return [q, extension_spherical(q1)];
    }
  }

  // Generates a 4-bit vector representing the location of a point relative to
  // the small circle's bounding box.
  function code(lambda, phi) {
    var r = smallRadius ? radius : extension_math_pi - radius,
        code = 0;
    if (lambda < -r) code |= 1; // left
    else if (lambda > r) code |= 2; // right
    if (phi < -r) code |= 4; // below
    else if (phi > r) code |= 8; // above
    return code;
  }

  return extension_src_clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-extension_math_pi, radius - extension_math_pi]);
}

;// ../../node_modules/d3-geo/src/clip/line.js
/* harmony default export */ function extension_clip_line(a, b, x0, y0, x1, y1) {
  var ax = a[0],
      ay = a[1],
      bx = b[0],
      by = b[1],
      t0 = 0,
      t1 = 1,
      dx = bx - ax,
      dy = by - ay,
      r;

  r = x0 - ax;
  if (!dx && r > 0) return;
  r /= dx;
  if (dx < 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  } else if (dx > 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  }

  r = x1 - ax;
  if (!dx && r < 0) return;
  r /= dx;
  if (dx < 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  } else if (dx > 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  }

  r = y0 - ay;
  if (!dy && r > 0) return;
  r /= dy;
  if (dy < 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  } else if (dy > 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  }

  r = y1 - ay;
  if (!dy && r < 0) return;
  r /= dy;
  if (dy < 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  } else if (dy > 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  }

  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
  return true;
}

;// ../../node_modules/d3-geo/src/clip/rectangle.js






var extension_clipMax = 1e9, extension_clipMin = -extension_clipMax;

// TODO Use d3-polygon’s polygonContains here for the ring check?
// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?

function extension_clipRectangle(x0, y0, x1, y1) {

  function visible(x, y) {
    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
  }

  function interpolate(from, to, direction, stream) {
    var a = 0, a1 = 0;
    if (from == null
        || (a = corner(from, direction)) !== (a1 = corner(to, direction))
        || comparePoint(from, to) < 0 ^ direction > 0) {
      do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
      while ((a = (a + direction + 4) % 4) !== a1);
    } else {
      stream.point(to[0], to[1]);
    }
  }

  function corner(p, direction) {
    return extension_math_abs(p[0] - x0) < extension_src_math_epsilon ? direction > 0 ? 0 : 3
        : extension_math_abs(p[0] - x1) < extension_src_math_epsilon ? direction > 0 ? 2 : 1
        : extension_math_abs(p[1] - y0) < extension_src_math_epsilon ? direction > 0 ? 1 : 0
        : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
  }

  function compareIntersection(a, b) {
    return comparePoint(a.x, b.x);
  }

  function comparePoint(a, b) {
    var ca = corner(a, 1),
        cb = corner(b, 1);
    return ca !== cb ? ca - cb
        : ca === 0 ? b[1] - a[1]
        : ca === 1 ? a[0] - b[0]
        : ca === 2 ? a[1] - b[1]
        : b[0] - a[0];
  }

  return function(stream) {
    var activeStream = stream,
        bufferStream = extension_buffer(),
        segments,
        polygon,
        ring,
        x__, y__, v__, // first point
        x_, y_, v_, // previous point
        first,
        clean;

    var clipStream = {
      point: point,
      lineStart: lineStart,
      lineEnd: lineEnd,
      polygonStart: polygonStart,
      polygonEnd: polygonEnd
    };

    function point(x, y) {
      if (visible(x, y)) activeStream.point(x, y);
    }

    function polygonInside() {
      var winding = 0;

      for (var i = 0, n = polygon.length; i < n; ++i) {
        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
          if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; }
          else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }
        }
      }

      return winding;
    }

    // Buffer geometry within a polygon and then clip it en masse.
    function polygonStart() {
      activeStream = bufferStream, segments = [], polygon = [], clean = true;
    }

    function polygonEnd() {
      var startInside = polygonInside(),
          cleanInside = clean && startInside,
          visible = (segments = extension_merge_merge(segments)).length;
      if (cleanInside || visible) {
        stream.polygonStart();
        if (cleanInside) {
          stream.lineStart();
          interpolate(null, null, 1, stream);
          stream.lineEnd();
        }
        if (visible) {
          extension_rejoin(segments, compareIntersection, startInside, interpolate, stream);
        }
        stream.polygonEnd();
      }
      activeStream = stream, segments = polygon = ring = null;
    }

    function lineStart() {
      clipStream.point = linePoint;
      if (polygon) polygon.push(ring = []);
      first = true;
      v_ = false;
      x_ = y_ = NaN;
    }

    // TODO rather than special-case polygons, simply handle them separately.
    // Ideally, coincident intersection points should be jittered to avoid
    // clipping issues.
    function lineEnd() {
      if (segments) {
        linePoint(x__, y__);
        if (v__ && v_) bufferStream.rejoin();
        segments.push(bufferStream.result());
      }
      clipStream.point = point;
      if (v_) activeStream.lineEnd();
    }

    function linePoint(x, y) {
      var v = visible(x, y);
      if (polygon) ring.push([x, y]);
      if (first) {
        x__ = x, y__ = y, v__ = v;
        first = false;
        if (v) {
          activeStream.lineStart();
          activeStream.point(x, y);
        }
      } else {
        if (v && v_) activeStream.point(x, y);
        else {
          var a = [x_ = Math.max(extension_clipMin, Math.min(extension_clipMax, x_)), y_ = Math.max(extension_clipMin, Math.min(extension_clipMax, y_))],
              b = [x = Math.max(extension_clipMin, Math.min(extension_clipMax, x)), y = Math.max(extension_clipMin, Math.min(extension_clipMax, y))];
          if (extension_clip_line(a, b, x0, y0, x1, y1)) {
            if (!v_) {
              activeStream.lineStart();
              activeStream.point(a[0], a[1]);
            }
            activeStream.point(b[0], b[1]);
            if (!v) activeStream.lineEnd();
            clean = false;
          } else if (v) {
            activeStream.lineStart();
            activeStream.point(x, y);
            clean = false;
          }
        }
      }
      x_ = x, y_ = y, v_ = v;
    }

    return clipStream;
  };
}

;// ../../node_modules/d3-geo/src/compose.js
/* harmony default export */ function extension_compose(a, b) {

  function compose(x, y) {
    return x = a(x, y), b(x[0], x[1]);
  }

  if (a.invert && b.invert) compose.invert = function(x, y) {
    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
  };

  return compose;
}

;// ../../node_modules/d3-geo/src/rotation.js



function extension_rotationIdentity(lambda, phi) {
  if (extension_math_abs(lambda) > extension_math_pi) lambda -= Math.round(lambda / extension_math_tau) * extension_math_tau;
  return [lambda, phi];
}

extension_rotationIdentity.invert = extension_rotationIdentity;

function extension_rotation_rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
  return (deltaLambda %= extension_math_tau) ? (deltaPhi || deltaGamma ? extension_compose(extension_rotationLambda(deltaLambda), extension_rotationPhiGamma(deltaPhi, deltaGamma))
    : extension_rotationLambda(deltaLambda))
    : (deltaPhi || deltaGamma ? extension_rotationPhiGamma(deltaPhi, deltaGamma)
    : extension_rotationIdentity);
}

function extension_forwardRotationLambda(deltaLambda) {
  return function(lambda, phi) {
    lambda += deltaLambda;
    if (extension_math_abs(lambda) > extension_math_pi) lambda -= Math.round(lambda / extension_math_tau) * extension_math_tau;
    return [lambda, phi];
  };
}

function extension_rotationLambda(deltaLambda) {
  var rotation = extension_forwardRotationLambda(deltaLambda);
  rotation.invert = extension_forwardRotationLambda(-deltaLambda);
  return rotation;
}

function extension_rotationPhiGamma(deltaPhi, deltaGamma) {
  var cosDeltaPhi = extension_math_cos(deltaPhi),
      sinDeltaPhi = extension_math_sin(deltaPhi),
      cosDeltaGamma = extension_math_cos(deltaGamma),
      sinDeltaGamma = extension_math_sin(deltaGamma);

  function rotation(lambda, phi) {
    var cosPhi = extension_math_cos(phi),
        x = extension_math_cos(lambda) * cosPhi,
        y = extension_math_sin(lambda) * cosPhi,
        z = extension_math_sin(phi),
        k = z * cosDeltaPhi + x * sinDeltaPhi;
    return [
      extension_math_atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
      extension_math_asin(k * cosDeltaGamma + y * sinDeltaGamma)
    ];
  }

  rotation.invert = function(lambda, phi) {
    var cosPhi = extension_math_cos(phi),
        x = extension_math_cos(lambda) * cosPhi,
        y = extension_math_sin(lambda) * cosPhi,
        z = extension_math_sin(phi),
        k = z * cosDeltaGamma - y * sinDeltaGamma;
    return [
      extension_math_atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
      extension_math_asin(k * cosDeltaPhi - x * sinDeltaPhi)
    ];
  };

  return rotation;
}

/* harmony default export */ function extension_rotation(rotate) {
  rotate = extension_rotation_rotateRadians(rotate[0] * extension_src_math_radians, rotate[1] * extension_src_math_radians, rotate.length > 2 ? rotate[2] * extension_src_math_radians : 0);

  function forward(coordinates) {
    coordinates = rotate(coordinates[0] * extension_src_math_radians, coordinates[1] * extension_src_math_radians);
    return coordinates[0] *= extension_src_math_degrees, coordinates[1] *= extension_src_math_degrees, coordinates;
  }

  forward.invert = function(coordinates) {
    coordinates = rotate.invert(coordinates[0] * extension_src_math_radians, coordinates[1] * extension_src_math_radians);
    return coordinates[0] *= extension_src_math_degrees, coordinates[1] *= extension_src_math_degrees, coordinates;
  };

  return forward;
}

;// ../../node_modules/d3-geo/src/transform.js
/* harmony default export */ function extension_src_transform(methods) {
  return {
    stream: extension_transform_transformer(methods)
  };
}

function extension_transform_transformer(methods) {
  return function(stream) {
    var s = new extension_TransformStream;
    for (var key in methods) s[key] = methods[key];
    s.stream = stream;
    return s;
  };
}

function extension_TransformStream() {}

extension_TransformStream.prototype = {
  constructor: extension_TransformStream,
  point: function(x, y) { this.stream.point(x, y); },
  sphere: function() { this.stream.sphere(); },
  lineStart: function() { this.stream.lineStart(); },
  lineEnd: function() { this.stream.lineEnd(); },
  polygonStart: function() { this.stream.polygonStart(); },
  polygonEnd: function() { this.stream.polygonEnd(); }
};

;// ../../node_modules/d3-geo/src/projection/fit.js



function extension_fit(projection, fitBounds, object) {
  var clip = projection.clipExtent && projection.clipExtent();
  projection.scale(150).translate([0, 0]);
  if (clip != null) projection.clipExtent(null);
  extension_src_stream(object, projection.stream(extension_path_bounds));
  fitBounds(extension_path_bounds.result());
  if (clip != null) projection.clipExtent(clip);
  return projection;
}

function extension_fitExtent(projection, extent, object) {
  return extension_fit(projection, function(b) {
    var w = extent[1][0] - extent[0][0],
        h = extent[1][1] - extent[0][1],
        k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
        x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
        y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
    projection.scale(150 * k).translate([x, y]);
  }, object);
}

function extension_fitSize(projection, size, object) {
  return extension_fitExtent(projection, [[0, 0], size], object);
}

function extension_fitWidth(projection, width, object) {
  return extension_fit(projection, function(b) {
    var w = +width,
        k = w / (b[1][0] - b[0][0]),
        x = (w - k * (b[1][0] + b[0][0])) / 2,
        y = -k * b[0][1];
    projection.scale(150 * k).translate([x, y]);
  }, object);
}

function extension_fitHeight(projection, height, object) {
  return extension_fit(projection, function(b) {
    var h = +height,
        k = h / (b[1][1] - b[0][1]),
        x = -k * b[0][0],
        y = (h - k * (b[1][1] + b[0][1])) / 2;
    projection.scale(150 * k).translate([x, y]);
  }, object);
}

;// ../../node_modules/d3-geo/src/projection/resample.js




var extension_maxDepth = 16, // maximum depth of subdivision
    extension_cosMinDistance = extension_math_cos(30 * extension_src_math_radians); // cos(minimum angular distance)

/* harmony default export */ function extension_resample(project, delta2) {
  return +delta2 ? extension_resample_resample(project, delta2) : extension_resampleNone(project);
}

function extension_resampleNone(project) {
  return extension_transform_transformer({
    point: function(x, y) {
      x = project(x, y);
      this.stream.point(x[0], x[1]);
    }
  });
}

function extension_resample_resample(project, delta2) {

  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
    var dx = x1 - x0,
        dy = y1 - y0,
        d2 = dx * dx + dy * dy;
    if (d2 > 4 * delta2 && depth--) {
      var a = a0 + a1,
          b = b0 + b1,
          c = c0 + c1,
          m = extension_math_sqrt(a * a + b * b + c * c),
          phi2 = extension_math_asin(c /= m),
          lambda2 = extension_math_abs(extension_math_abs(c) - 1) < extension_src_math_epsilon || extension_math_abs(lambda0 - lambda1) < extension_src_math_epsilon ? (lambda0 + lambda1) / 2 : extension_math_atan2(b, a),
          p = project(lambda2, phi2),
          x2 = p[0],
          y2 = p[1],
          dx2 = x2 - x0,
          dy2 = y2 - y0,
          dz = dy * dx2 - dx * dy2;
      if (dz * dz / d2 > delta2 // perpendicular projected distance
          || extension_math_abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
          || a0 * a1 + b0 * b1 + c0 * c1 < extension_cosMinDistance) { // angular distance
        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
        stream.point(x2, y2);
        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
      }
    }
  }
  return function(stream) {
    var lambda00, x00, y00, a00, b00, c00, // first point
        lambda0, x0, y0, a0, b0, c0; // previous point

    var resampleStream = {
      point: point,
      lineStart: lineStart,
      lineEnd: lineEnd,
      polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
      polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
    };

    function point(x, y) {
      x = project(x, y);
      stream.point(x[0], x[1]);
    }

    function lineStart() {
      x0 = NaN;
      resampleStream.point = linePoint;
      stream.lineStart();
    }

    function linePoint(lambda, phi) {
      var c = extension_cartesian_cartesian([lambda, phi]), p = project(lambda, phi);
      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], extension_maxDepth, stream);
      stream.point(x0, y0);
    }

    function lineEnd() {
      resampleStream.point = point;
      stream.lineEnd();
    }

    function ringStart() {
      lineStart();
      resampleStream.point = ringPoint;
      resampleStream.lineEnd = ringEnd;
    }

    function ringPoint(lambda, phi) {
      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
      resampleStream.point = linePoint;
    }

    function ringEnd() {
      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, extension_maxDepth, stream);
      resampleStream.lineEnd = lineEnd;
      lineEnd();
    }

    return resampleStream;
  };
}

;// ../../node_modules/d3-geo/src/projection/index.js











var extension_transformRadians = extension_transform_transformer({
  point: function(x, y) {
    this.stream.point(x * extension_src_math_radians, y * extension_src_math_radians);
  }
});

function extension_transformRotate(rotate) {
  return extension_transform_transformer({
    point: function(x, y) {
      var r = rotate(x, y);
      return this.stream.point(r[0], r[1]);
    }
  });
}

function extension_scaleTranslate(k, dx, dy, sx, sy) {
  function transform(x, y) {
    x *= sx; y *= sy;
    return [dx + k * x, dy - k * y];
  }
  transform.invert = function(x, y) {
    return [(x - dx) / k * sx, (dy - y) / k * sy];
  };
  return transform;
}

function extension_scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
  if (!alpha) return extension_scaleTranslate(k, dx, dy, sx, sy);
  var cosAlpha = extension_math_cos(alpha),
      sinAlpha = extension_math_sin(alpha),
      a = cosAlpha * k,
      b = sinAlpha * k,
      ai = cosAlpha / k,
      bi = sinAlpha / k,
      ci = (sinAlpha * dy - cosAlpha * dx) / k,
      fi = (sinAlpha * dx + cosAlpha * dy) / k;
  function transform(x, y) {
    x *= sx; y *= sy;
    return [a * x - b * y + dx, dy - b * x - a * y];
  }
  transform.invert = function(x, y) {
    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
  };
  return transform;
}

function extension_projection(project) {
  return extension_projectionMutator(function() { return project; })();
}

function extension_projectionMutator(projectAt) {
  var project,
      k = 150, // scale
      x = 480, y = 250, // translate
      lambda = 0, phi = 0, // center
      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
      alpha = 0, // post-rotate angle
      sx = 1, // reflectX
      sy = 1, // reflectX
      theta = null, preclip = extension_antimeridian, // pre-clip angle
      x0 = null, y0, x1, y1, postclip = extension_d3_geo_src_identity, // post-clip extent
      delta2 = 0.5, // precision
      projectResample,
      projectTransform,
      projectRotateTransform,
      cache,
      cacheStream;

  function projection(point) {
    return projectRotateTransform(point[0] * extension_src_math_radians, point[1] * extension_src_math_radians);
  }

  function invert(point) {
    point = projectRotateTransform.invert(point[0], point[1]);
    return point && [point[0] * extension_src_math_degrees, point[1] * extension_src_math_degrees];
  }

  projection.stream = function(stream) {
    return cache && cacheStream === stream ? cache : cache = extension_transformRadians(extension_transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
  };

  projection.preclip = function(_) {
    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
  };

  projection.postclip = function(_) {
    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
  };

  projection.clipAngle = function(_) {
    return arguments.length ? (preclip = +_ ? extension_clip_circle(theta = _ * extension_src_math_radians) : (theta = null, extension_antimeridian), reset()) : theta * extension_src_math_degrees;
  };

  projection.clipExtent = function(_) {
    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, extension_d3_geo_src_identity) : extension_clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
  };

  projection.scale = function(_) {
    return arguments.length ? (k = +_, recenter()) : k;
  };

  projection.translate = function(_) {
    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
  };

  projection.center = function(_) {
    return arguments.length ? (lambda = _[0] % 360 * extension_src_math_radians, phi = _[1] % 360 * extension_src_math_radians, recenter()) : [lambda * extension_src_math_degrees, phi * extension_src_math_degrees];
  };

  projection.rotate = function(_) {
    return arguments.length ? (deltaLambda = _[0] % 360 * extension_src_math_radians, deltaPhi = _[1] % 360 * extension_src_math_radians, deltaGamma = _.length > 2 ? _[2] % 360 * extension_src_math_radians : 0, recenter()) : [deltaLambda * extension_src_math_degrees, deltaPhi * extension_src_math_degrees, deltaGamma * extension_src_math_degrees];
  };

  projection.angle = function(_) {
    return arguments.length ? (alpha = _ % 360 * extension_src_math_radians, recenter()) : alpha * extension_src_math_degrees;
  };

  projection.reflectX = function(_) {
    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
  };

  projection.reflectY = function(_) {
    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
  };

  projection.precision = function(_) {
    return arguments.length ? (projectResample = extension_resample(projectTransform, delta2 = _ * _), reset()) : extension_math_sqrt(delta2);
  };

  projection.fitExtent = function(extent, object) {
    return extension_fitExtent(projection, extent, object);
  };

  projection.fitSize = function(size, object) {
    return extension_fitSize(projection, size, object);
  };

  projection.fitWidth = function(width, object) {
    return extension_fitWidth(projection, width, object);
  };

  projection.fitHeight = function(height, object) {
    return extension_fitHeight(projection, height, object);
  };

  function recenter() {
    var center = extension_scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
        transform = extension_scaleTranslateRotate(k, x - center[0], y - center[1], sx, sy, alpha);
    rotate = extension_rotation_rotateRadians(deltaLambda, deltaPhi, deltaGamma);
    projectTransform = extension_compose(project, transform);
    projectRotateTransform = extension_compose(rotate, projectTransform);
    projectResample = extension_resample(projectTransform, delta2);
    return reset();
  }

  function reset() {
    cache = cacheStream = null;
    return projection;
  }

  return function() {
    project = projectAt.apply(this, arguments);
    projection.invert = project.invert && invert;
    return recenter();
  };
}

;// ../../node_modules/d3-geo/src/projection/conic.js



function extension_conicProjection(projectAt) {
  var phi0 = 0,
      phi1 = extension_math_pi / 3,
      m = extension_projectionMutator(projectAt),
      p = m(phi0, phi1);

  p.parallels = function(_) {
    return arguments.length ? m(phi0 = _[0] * extension_src_math_radians, phi1 = _[1] * extension_src_math_radians) : [phi0 * extension_src_math_degrees, phi1 * extension_src_math_degrees];
  };

  return p;
}

;// ../../node_modules/d3-geo/src/projection/cylindricalEqualArea.js


function extension_cylindricalEqualAreaRaw(phi0) {
  var cosPhi0 = extension_math_cos(phi0);

  function forward(lambda, phi) {
    return [lambda * cosPhi0, extension_math_sin(phi) / cosPhi0];
  }

  forward.invert = function(x, y) {
    return [x / cosPhi0, extension_math_asin(y * cosPhi0)];
  };

  return forward;
}

;// ../../node_modules/d3-geo/src/projection/conicEqualArea.js




function extension_conicEqualAreaRaw(y0, y1) {
  var sy0 = extension_math_sin(y0), n = (sy0 + extension_math_sin(y1)) / 2;

  // Are the parallels symmetrical around the Equator?
  if (extension_math_abs(n) < extension_src_math_epsilon) return extension_cylindricalEqualAreaRaw(y0);

  var c = 1 + sy0 * (2 * n - sy0), r0 = extension_math_sqrt(c) / n;

  function project(x, y) {
    var r = extension_math_sqrt(c - 2 * n * extension_math_sin(y)) / n;
    return [r * extension_math_sin(x *= n), r0 - r * extension_math_cos(x)];
  }

  project.invert = function(x, y) {
    var r0y = r0 - y,
        l = extension_math_atan2(x, extension_math_abs(r0y)) * extension_math_sign(r0y);
    if (r0y * n < 0)
      l -= extension_math_pi * extension_math_sign(x) * extension_math_sign(r0y);
    return [l / n, extension_math_asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
  };

  return project;
}

/* harmony default export */ function extension_conicEqualArea() {
  return extension_conicProjection(extension_conicEqualAreaRaw)
      .scale(155.424)
      .center([0, 33.6442]);
}

;// ../../node_modules/d3-geo/src/projection/albers.js


/* harmony default export */ function extension_albers() {
  return extension_conicEqualArea()
      .parallels([29.5, 45.5])
      .scale(1070)
      .translate([480, 250])
      .rotate([96, 0])
      .center([-0.6, 38.7]);
}

;// ../../node_modules/d3-geo/src/projection/albersUsa.js





// The projections must have mutually exclusive clip regions on the sphere,
// as this will avoid emitting interleaving lines and polygons.
function extension_multiplex(streams) {
  var n = streams.length;
  return {
    point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },
    sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },
    lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },
    lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },
    polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },
    polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }
  };
}

// A composite projection for the United States, configured by default for
// 960×500. The projection also works quite well at 960×600 if you change the
// scale to 1285 and adjust the translate accordingly. The set of standard
// parallels for each region comes from USGS, which is published here:
// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
/* harmony default export */ function extension_albersUsa() {
  var cache,
      cacheStream,
      lower48 = extension_albers(), lower48Point,
      alaska = extension_conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338
      hawaii = extension_conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007
      point, pointStream = {point: function(x, y) { point = [x, y]; }};

  function albersUsa(coordinates) {
    var x = coordinates[0], y = coordinates[1];
    return point = null,
        (lower48Point.point(x, y), point)
        || (alaskaPoint.point(x, y), point)
        || (hawaiiPoint.point(x, y), point);
  }

  albersUsa.invert = function(coordinates) {
    var k = lower48.scale(),
        t = lower48.translate(),
        x = (coordinates[0] - t[0]) / k,
        y = (coordinates[1] - t[1]) / k;
    return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska
        : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii
        : lower48).invert(coordinates);
  };

  albersUsa.stream = function(stream) {
    return cache && cacheStream === stream ? cache : cache = extension_multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);
  };

  albersUsa.precision = function(_) {
    if (!arguments.length) return lower48.precision();
    lower48.precision(_), alaska.precision(_), hawaii.precision(_);
    return reset();
  };

  albersUsa.scale = function(_) {
    if (!arguments.length) return lower48.scale();
    lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);
    return albersUsa.translate(lower48.translate());
  };

  albersUsa.translate = function(_) {
    if (!arguments.length) return lower48.translate();
    var k = lower48.scale(), x = +_[0], y = +_[1];

    lower48Point = lower48
        .translate(_)
        .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])
        .stream(pointStream);

    alaskaPoint = alaska
        .translate([x - 0.307 * k, y + 0.201 * k])
        .clipExtent([[x - 0.425 * k + extension_src_math_epsilon, y + 0.120 * k + extension_src_math_epsilon], [x - 0.214 * k - extension_src_math_epsilon, y + 0.234 * k - extension_src_math_epsilon]])
        .stream(pointStream);

    hawaiiPoint = hawaii
        .translate([x - 0.205 * k, y + 0.212 * k])
        .clipExtent([[x - 0.214 * k + extension_src_math_epsilon, y + 0.166 * k + extension_src_math_epsilon], [x - 0.115 * k - extension_src_math_epsilon, y + 0.234 * k - extension_src_math_epsilon]])
        .stream(pointStream);

    return reset();
  };

  albersUsa.fitExtent = function(extent, object) {
    return extension_fitExtent(albersUsa, extent, object);
  };

  albersUsa.fitSize = function(size, object) {
    return extension_fitSize(albersUsa, size, object);
  };

  albersUsa.fitWidth = function(width, object) {
    return extension_fitWidth(albersUsa, width, object);
  };

  albersUsa.fitHeight = function(height, object) {
    return extension_fitHeight(albersUsa, height, object);
  };

  function reset() {
    cache = cacheStream = null;
    return albersUsa;
  }

  return albersUsa.scale(1070);
}

;// ../../node_modules/d3-geo/src/projection/azimuthal.js


function extension_azimuthalRaw(scale) {
  return function(x, y) {
    var cx = extension_math_cos(x),
        cy = extension_math_cos(y),
        k = scale(cx * cy);
        if (k === Infinity) return [2, 0];
    return [
      k * cy * extension_math_sin(x),
      k * extension_math_sin(y)
    ];
  }
}

function extension_azimuthalInvert(angle) {
  return function(x, y) {
    var z = extension_math_sqrt(x * x + y * y),
        c = angle(z),
        sc = extension_math_sin(c),
        cc = extension_math_cos(c);
    return [
      extension_math_atan2(x * sc, z * cc),
      extension_math_asin(z && y * sc / z)
    ];
  }
}

;// ../../node_modules/d3-geo/src/projection/azimuthalEqualArea.js




var extension_azimuthalEqualAreaRaw = extension_azimuthalRaw(function(cxcy) {
  return extension_math_sqrt(2 / (1 + cxcy));
});

extension_azimuthalEqualAreaRaw.invert = extension_azimuthalInvert(function(z) {
  return 2 * extension_math_asin(z / 2);
});

/* harmony default export */ function extension_azimuthalEqualArea() {
  return extension_projection(extension_azimuthalEqualAreaRaw)
      .scale(124.75)
      .clipAngle(180 - 1e-3);
}

;// ../../node_modules/d3-geo/src/projection/azimuthalEquidistant.js




var extension_azimuthalEquidistantRaw = extension_azimuthalRaw(function(c) {
  return (c = extension_math_acos(c)) && c / extension_math_sin(c);
});

extension_azimuthalEquidistantRaw.invert = extension_azimuthalInvert(function(z) {
  return z;
});

/* harmony default export */ function extension_azimuthalEquidistant() {
  return extension_projection(extension_azimuthalEquidistantRaw)
      .scale(79.4188)
      .clipAngle(180 - 1e-3);
}

;// ../../node_modules/d3-geo/src/projection/mercator.js




function extension_mercatorRaw(lambda, phi) {
  return [lambda, extension_math_log(extension_tan((extension_math_halfPi + phi) / 2))];
}

extension_mercatorRaw.invert = function(x, y) {
  return [x, 2 * extension_atan(extension_math_exp(y)) - extension_math_halfPi];
};

/* harmony default export */ function extension_mercator() {
  return extension_mercatorProjection(extension_mercatorRaw)
      .scale(961 / extension_math_tau);
}

function extension_mercatorProjection(project) {
  var m = extension_projection(project),
      center = m.center,
      scale = m.scale,
      translate = m.translate,
      clipExtent = m.clipExtent,
      x0 = null, y0, x1, y1; // clip extent

  m.scale = function(_) {
    return arguments.length ? (scale(_), reclip()) : scale();
  };

  m.translate = function(_) {
    return arguments.length ? (translate(_), reclip()) : translate();
  };

  m.center = function(_) {
    return arguments.length ? (center(_), reclip()) : center();
  };

  m.clipExtent = function(_) {
    return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
  };

  function reclip() {
    var k = extension_math_pi * scale(),
        t = m(extension_rotation(m.rotate()).invert([0, 0]));
    return clipExtent(x0 == null
        ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === extension_mercatorRaw
        ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]
        : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
  }

  return reclip();
}

;// ../../node_modules/d3-geo/src/projection/conicConformal.js




function extension_tany(y) {
  return extension_tan((extension_math_halfPi + y) / 2);
}

function extension_conicConformalRaw(y0, y1) {
  var cy0 = extension_math_cos(y0),
      n = y0 === y1 ? extension_math_sin(y0) : extension_math_log(cy0 / extension_math_cos(y1)) / extension_math_log(extension_tany(y1) / extension_tany(y0)),
      f = cy0 * extension_math_pow(extension_tany(y0), n) / n;

  if (!n) return extension_mercatorRaw;

  function project(x, y) {
    if (f > 0) { if (y < -extension_math_halfPi + extension_src_math_epsilon) y = -extension_math_halfPi + extension_src_math_epsilon; }
    else { if (y > extension_math_halfPi - extension_src_math_epsilon) y = extension_math_halfPi - extension_src_math_epsilon; }
    var r = f / extension_math_pow(extension_tany(y), n);
    return [r * extension_math_sin(n * x), f - r * extension_math_cos(n * x)];
  }

  project.invert = function(x, y) {
    var fy = f - y, r = extension_math_sign(n) * extension_math_sqrt(x * x + fy * fy),
      l = extension_math_atan2(x, extension_math_abs(fy)) * extension_math_sign(fy);
    if (fy * n < 0)
      l -= extension_math_pi * extension_math_sign(x) * extension_math_sign(fy);
    return [l / n, 2 * extension_atan(extension_math_pow(f / r, 1 / n)) - extension_math_halfPi];
  };

  return project;
}

/* harmony default export */ function extension_conicConformal() {
  return extension_conicProjection(extension_conicConformalRaw)
      .scale(109.5)
      .parallels([30, 30]);
}

;// ../../node_modules/d3-geo/src/projection/equirectangular.js


function extension_equirectangularRaw(lambda, phi) {
  return [lambda, phi];
}

extension_equirectangularRaw.invert = extension_equirectangularRaw;

/* harmony default export */ function extension_equirectangular() {
  return extension_projection(extension_equirectangularRaw)
      .scale(152.63);
}

;// ../../node_modules/d3-geo/src/projection/conicEquidistant.js




function extension_conicEquidistantRaw(y0, y1) {
  var cy0 = extension_math_cos(y0),
      n = y0 === y1 ? extension_math_sin(y0) : (cy0 - extension_math_cos(y1)) / (y1 - y0),
      g = cy0 / n + y0;

  if (extension_math_abs(n) < extension_src_math_epsilon) return extension_equirectangularRaw;

  function project(x, y) {
    var gy = g - y, nx = n * x;
    return [gy * extension_math_sin(nx), g - gy * extension_math_cos(nx)];
  }

  project.invert = function(x, y) {
    var gy = g - y,
        l = extension_math_atan2(x, extension_math_abs(gy)) * extension_math_sign(gy);
    if (gy * n < 0)
      l -= extension_math_pi * extension_math_sign(x) * extension_math_sign(gy);
    return [l / n, g - extension_math_sign(n) * extension_math_sqrt(x * x + gy * gy)];
  };

  return project;
}

/* harmony default export */ function extension_conicEquidistant() {
  return extension_conicProjection(extension_conicEquidistantRaw)
      .scale(131.154)
      .center([0, 13.9389]);
}

;// ../../node_modules/d3-geo/src/projection/equalEarth.js



var extension_A1 = 1.340264,
    extension_A2 = -0.081106,
    extension_A3 = 0.000893,
    extension_A4 = 0.003796,
    extension_M = extension_math_sqrt(3) / 2,
    extension_iterations = 12;

function extension_equalEarthRaw(lambda, phi) {
  var l = extension_math_asin(extension_M * extension_math_sin(phi)), l2 = l * l, l6 = l2 * l2 * l2;
  return [
    lambda * extension_math_cos(l) / (extension_M * (extension_A1 + 3 * extension_A2 * l2 + l6 * (7 * extension_A3 + 9 * extension_A4 * l2))),
    l * (extension_A1 + extension_A2 * l2 + l6 * (extension_A3 + extension_A4 * l2))
  ];
}

extension_equalEarthRaw.invert = function(x, y) {
  var l = y, l2 = l * l, l6 = l2 * l2 * l2;
  for (var i = 0, delta, fy, fpy; i < extension_iterations; ++i) {
    fy = l * (extension_A1 + extension_A2 * l2 + l6 * (extension_A3 + extension_A4 * l2)) - y;
    fpy = extension_A1 + 3 * extension_A2 * l2 + l6 * (7 * extension_A3 + 9 * extension_A4 * l2);
    l -= delta = fy / fpy, l2 = l * l, l6 = l2 * l2 * l2;
    if (extension_math_abs(delta) < extension_math_epsilon2) break;
  }
  return [
    extension_M * x * (extension_A1 + 3 * extension_A2 * l2 + l6 * (7 * extension_A3 + 9 * extension_A4 * l2)) / extension_math_cos(l),
    extension_math_asin(extension_math_sin(l) / extension_M)
  ];
};

/* harmony default export */ function extension_equalEarth() {
  return extension_projection(extension_equalEarthRaw)
      .scale(177.158);
}

;// ../../node_modules/d3-geo/src/projection/gnomonic.js




function extension_gnomonicRaw(x, y) {
  var cy = extension_math_cos(y), k = extension_math_cos(x) * cy;
  return [cy * extension_math_sin(x) / k, extension_math_sin(y) / k];
}

extension_gnomonicRaw.invert = extension_azimuthalInvert(extension_atan);

/* harmony default export */ function extension_gnomonic() {
  return extension_projection(extension_gnomonicRaw)
      .scale(144.049)
      .clipAngle(60);
}

;// ../../node_modules/d3-geo/src/projection/identity.js






/* harmony default export */ function extension_projection_identity() {
  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, // scale, translate and reflect
      alpha = 0, ca, sa, // angle
      x0 = null, y0, x1, y1, // clip extent
      kx = 1, ky = 1,
      transform = extension_transform_transformer({
        point: function(x, y) {
          var p = projection([x, y])
          this.stream.point(p[0], p[1]);
        }
      }),
      postclip = extension_d3_geo_src_identity,
      cache,
      cacheStream;

  function reset() {
    kx = k * sx;
    ky = k * sy;
    cache = cacheStream = null;
    return projection;
  }

  function projection (p) {
    var x = p[0] * kx, y = p[1] * ky;
    if (alpha) {
      var t = y * ca - x * sa;
      x = x * ca + y * sa;
      y = t;
    }    
    return [x + tx, y + ty];
  }
  projection.invert = function(p) {
    var x = p[0] - tx, y = p[1] - ty;
    if (alpha) {
      var t = y * ca + x * sa;
      x = x * ca - y * sa;
      y = t;
    }
    return [x / kx, y / ky];
  };
  projection.stream = function(stream) {
    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
  };
  projection.postclip = function(_) {
    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
  };
  projection.clipExtent = function(_) {
    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, extension_d3_geo_src_identity) : extension_clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
  };
  projection.scale = function(_) {
    return arguments.length ? (k = +_, reset()) : k;
  };
  projection.translate = function(_) {
    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
  }
  projection.angle = function(_) {
    return arguments.length ? (alpha = _ % 360 * extension_src_math_radians, sa = extension_math_sin(alpha), ca = extension_math_cos(alpha), reset()) : alpha * extension_src_math_degrees;
  };
  projection.reflectX = function(_) {
    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
  };
  projection.reflectY = function(_) {
    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
  };
  projection.fitExtent = function(extent, object) {
    return extension_fitExtent(projection, extent, object);
  };
  projection.fitSize = function(size, object) {
    return extension_fitSize(projection, size, object);
  };
  projection.fitWidth = function(width, object) {
    return extension_fitWidth(projection, width, object);
  };
  projection.fitHeight = function(height, object) {
    return extension_fitHeight(projection, height, object);
  };

  return projection;
}

;// ../../node_modules/d3-geo/src/projection/naturalEarth1.js



function extension_naturalEarth1Raw(lambda, phi) {
  var phi2 = phi * phi, phi4 = phi2 * phi2;
  return [
    lambda * (0.8707 - 0.131979 * phi2 + phi4 * (-0.013791 + phi4 * (0.003971 * phi2 - 0.001529 * phi4))),
    phi * (1.007226 + phi2 * (0.015085 + phi4 * (-0.044475 + 0.028874 * phi2 - 0.005916 * phi4)))
  ];
}

extension_naturalEarth1Raw.invert = function(x, y) {
  var phi = y, i = 25, delta;
  do {
    var phi2 = phi * phi, phi4 = phi2 * phi2;
    phi -= delta = (phi * (1.007226 + phi2 * (0.015085 + phi4 * (-0.044475 + 0.028874 * phi2 - 0.005916 * phi4))) - y) /
        (1.007226 + phi2 * (0.015085 * 3 + phi4 * (-0.044475 * 7 + 0.028874 * 9 * phi2 - 0.005916 * 11 * phi4)));
  } while (extension_math_abs(delta) > extension_src_math_epsilon && --i > 0);
  return [
    x / (0.8707 + (phi2 = phi * phi) * (-0.131979 + phi2 * (-0.013791 + phi2 * phi2 * phi2 * (0.003971 - 0.001529 * phi2)))),
    phi
  ];
};

/* harmony default export */ function extension_naturalEarth1() {
  return extension_projection(extension_naturalEarth1Raw)
      .scale(175.295);
}

;// ../../node_modules/d3-geo/src/projection/orthographic.js




function extension_orthographicRaw(x, y) {
  return [extension_math_cos(y) * extension_math_sin(x), extension_math_sin(y)];
}

extension_orthographicRaw.invert = extension_azimuthalInvert(extension_math_asin);

/* harmony default export */ function extension_orthographic() {
  return extension_projection(extension_orthographicRaw)
      .scale(249.5)
      .clipAngle(90 + extension_src_math_epsilon);
}

;// ../../node_modules/d3-geo/src/projection/stereographic.js




function extension_stereographicRaw(x, y) {
  var cy = extension_math_cos(y), k = 1 + extension_math_cos(x) * cy;
  return [cy * extension_math_sin(x) / k, extension_math_sin(y) / k];
}

extension_stereographicRaw.invert = extension_azimuthalInvert(function(z) {
  return 2 * extension_atan(z);
});

/* harmony default export */ function extension_stereographic() {
  return extension_projection(extension_stereographicRaw)
      .scale(250)
      .clipAngle(142);
}

;// ../../node_modules/d3-geo/src/projection/transverseMercator.js



function extension_transverseMercatorRaw(lambda, phi) {
  return [extension_math_log(extension_tan((extension_math_halfPi + phi) / 2)), -lambda];
}

extension_transverseMercatorRaw.invert = function(x, y) {
  return [-y, 2 * extension_atan(extension_math_exp(x)) - extension_math_halfPi];
};

/* harmony default export */ function extension_transverseMercator() {
  var m = extension_mercatorProjection(extension_transverseMercatorRaw),
      center = m.center,
      rotate = m.rotate;

  m.center = function(_) {
    return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);
  };

  m.rotate = function(_) {
    return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);
  };

  return rotate([0, 0, 90])
      .scale(159.155);
}

;// ../../node_modules/d3-geo-projection/src/math.js
var extension_src_math_abs = Math.abs;
var extension_math_atan = Math.atan;
var extension_src_math_atan2 = Math.atan2;
var extension_math_ceil = Math.ceil;
var extension_src_math_cos = Math.cos;
var extension_src_math_exp = Math.exp;
var extension_src_math_floor = Math.floor;
var extension_src_math_log = Math.log;
var extension_src_math_max = Math.max;
var extension_src_math_min = Math.min;
var extension_src_math_pow = Math.pow;
var extension_round = Math.round;
var extension_src_math_sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
var extension_src_math_sin = Math.sin;
var extension_math_tan = Math.tan;

var extension_d3_geo_projection_src_math_epsilon = 1e-6;
var extension_src_math_epsilon2 = 1e-12;
var extension_src_math_pi = Math.PI;
var extension_src_math_halfPi = extension_src_math_pi / 2;
var extension_math_quarterPi = extension_src_math_pi / 4;
var extension_sqrt1_2 = Math.SQRT1_2;
var extension_sqrt2 = extension_src_math_sqrt(2);
var extension_sqrtPi = extension_src_math_sqrt(extension_src_math_pi);
var extension_src_math_tau = extension_src_math_pi * 2;
var extension_d3_geo_projection_src_math_degrees = 180 / extension_src_math_pi;
var extension_d3_geo_projection_src_math_radians = extension_src_math_pi / 180;

function extension_sinci(x) {
  return x ? x / Math.sin(x) : 1;
}

function extension_src_math_asin(x) {
  return x > 1 ? extension_src_math_halfPi : x < -1 ? -extension_src_math_halfPi : Math.asin(x);
}

function extension_src_math_acos(x) {
  return x > 1 ? 0 : x < -1 ? extension_src_math_pi : Math.acos(x);
}

function extension_src_math_sqrt(x) {
  return x > 0 ? Math.sqrt(x) : 0;
}

function extension_math_tanh(x) {
  x = extension_src_math_exp(2 * x);
  return (x - 1) / (x + 1);
}

function extension_math_sinh(x) {
  return (extension_src_math_exp(x) - extension_src_math_exp(-x)) / 2;
}

function extension_math_cosh(x) {
  return (extension_src_math_exp(x) + extension_src_math_exp(-x)) / 2;
}

function extension_arsinh(x) {
  return extension_src_math_log(x + extension_src_math_sqrt(x * x + 1));
}

function extension_arcosh(x) {
  return extension_src_math_log(x + extension_src_math_sqrt(x * x - 1));
}

;// ../../node_modules/d3-geo-projection/src/mollweide.js



function extension_mollweideBromleyTheta(cp, phi) {
  var cpsinPhi = cp * extension_src_math_sin(phi), i = 30, delta;
  do phi -= delta = (phi + extension_src_math_sin(phi) - cpsinPhi) / (1 + extension_src_math_cos(phi));
  while (extension_src_math_abs(delta) > extension_d3_geo_projection_src_math_epsilon && --i > 0);
  return phi / 2;
}

function extension_mollweideBromleyRaw(cx, cy, cp) {

  function forward(lambda, phi) {
    return [cx * lambda * extension_src_math_cos(phi = extension_mollweideBromleyTheta(cp, phi)), cy * extension_src_math_sin(phi)];
  }

  forward.invert = function(x, y) {
    return y = extension_src_math_asin(y / cy), [x / (cx * extension_src_math_cos(y)), extension_src_math_asin((2 * y + extension_src_math_sin(2 * y)) / cp)];
  };

  return forward;
}

var extension_mollweideRaw = extension_mollweideBromleyRaw(extension_sqrt2 / extension_src_math_halfPi, extension_sqrt2, extension_src_math_pi);

/* harmony default export */ function extension_mollweide() {
  return extension_projection(extension_mollweideRaw)
      .scale(169.529);
}

;// ../../node_modules/vega-projection/build/vega-projection.module.js




const extension_defaultPath = extension_src_path();
const extension_projectionProperties = [
// standard properties in d3-geo
'clipAngle', 'clipExtent', 'scale', 'translate', 'center', 'rotate', 'parallels', 'precision', 'reflectX', 'reflectY',
// extended properties in d3-geo-projections
'coefficient', 'distance', 'fraction', 'lobes', 'parallel', 'radius', 'ratio', 'spacing', 'tilt'];

/**
 * Augment projections with their type and a copy method.
 */
function extension_vega_projection_module_create(type, constructor) {
  return function projection() {
    const p = constructor();
    p.type = type;
    p.path = extension_src_path().projection(p);
    p.copy = p.copy || function () {
      const c = projection();
      extension_projectionProperties.forEach(prop => {
        if (p[prop]) c[prop](p[prop]());
      });
      c.path.pointRadius(p.path.pointRadius());
      return c;
    };
    return extension_registerScale(p);
  };
}
function extension_vega_projection_module_projection(type, proj) {
  if (!type || typeof type !== 'string') {
    throw new Error('Projection type must be a name string.');
  }
  type = type.toLowerCase();
  if (arguments.length > 1) {
    extension_projections[type] = extension_vega_projection_module_create(type, proj);
    return this;
  } else {
    return extension_projections[type] || null;
  }
}
function extension_getProjectionPath(proj) {
  return proj && proj.path || extension_defaultPath;
}
const extension_projections = {
  // base d3-geo projection types
  albers: extension_albers,
  albersusa: extension_albersUsa,
  azimuthalequalarea: extension_azimuthalEqualArea,
  azimuthalequidistant: extension_azimuthalEquidistant,
  conicconformal: extension_conicConformal,
  conicequalarea: extension_conicEqualArea,
  conicequidistant: extension_conicEquidistant,
  equalEarth: extension_equalEarth,
  equirectangular: extension_equirectangular,
  gnomonic: extension_gnomonic,
  identity: extension_projection_identity,
  mercator: extension_mercator,
  mollweide: extension_mollweide,
  naturalEarth1: extension_naturalEarth1,
  orthographic: extension_orthographic,
  stereographic: extension_stereographic,
  transversemercator: extension_transverseMercator
};
for (const key in extension_projections) {
  extension_vega_projection_module_projection(key, extension_projections[key]);
}



;// ../../node_modules/d3-geo/src/graticule.js



function extension_graticuleX(y0, y1, dy) {
  var y = extension_range_range(y0, y1 - extension_src_math_epsilon, dy).concat(y1);
  return function(x) { return y.map(function(y) { return [x, y]; }); };
}

function extension_graticuleY(x0, x1, dx) {
  var x = extension_range_range(x0, x1 - extension_src_math_epsilon, dx).concat(x1);
  return function(y) { return x.map(function(x) { return [x, y]; }); };
}

function extension_graticule() {
  var x1, x0, X1, X0,
      y1, y0, Y1, Y0,
      dx = 10, dy = dx, DX = 90, DY = 360,
      x, y, X, Y,
      precision = 2.5;

  function graticule() {
    return {type: "MultiLineString", coordinates: lines()};
  }

  function lines() {
    return extension_range_range(extension_ceil(X0 / DX) * DX, X1, DX).map(X)
        .concat(extension_range_range(extension_ceil(Y0 / DY) * DY, Y1, DY).map(Y))
        .concat(extension_range_range(extension_ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return extension_math_abs(x % DX) > extension_src_math_epsilon; }).map(x))
        .concat(extension_range_range(extension_ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return extension_math_abs(y % DY) > extension_src_math_epsilon; }).map(y));
  }

  graticule.lines = function() {
    return lines().map(function(coordinates) { return {type: "LineString", coordinates: coordinates}; });
  };

  graticule.outline = function() {
    return {
      type: "Polygon",
      coordinates: [
        X(X0).concat(
        Y(Y1).slice(1),
        X(X1).reverse().slice(1),
        Y(Y0).reverse().slice(1))
      ]
    };
  };

  graticule.extent = function(_) {
    if (!arguments.length) return graticule.extentMinor();
    return graticule.extentMajor(_).extentMinor(_);
  };

  graticule.extentMajor = function(_) {
    if (!arguments.length) return [[X0, Y0], [X1, Y1]];
    X0 = +_[0][0], X1 = +_[1][0];
    Y0 = +_[0][1], Y1 = +_[1][1];
    if (X0 > X1) _ = X0, X0 = X1, X1 = _;
    if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
    return graticule.precision(precision);
  };

  graticule.extentMinor = function(_) {
    if (!arguments.length) return [[x0, y0], [x1, y1]];
    x0 = +_[0][0], x1 = +_[1][0];
    y0 = +_[0][1], y1 = +_[1][1];
    if (x0 > x1) _ = x0, x0 = x1, x1 = _;
    if (y0 > y1) _ = y0, y0 = y1, y1 = _;
    return graticule.precision(precision);
  };

  graticule.step = function(_) {
    if (!arguments.length) return graticule.stepMinor();
    return graticule.stepMajor(_).stepMinor(_);
  };

  graticule.stepMajor = function(_) {
    if (!arguments.length) return [DX, DY];
    DX = +_[0], DY = +_[1];
    return graticule;
  };

  graticule.stepMinor = function(_) {
    if (!arguments.length) return [dx, dy];
    dx = +_[0], dy = +_[1];
    return graticule;
  };

  graticule.precision = function(_) {
    if (!arguments.length) return precision;
    precision = +_;
    x = extension_graticuleX(y0, y1, 90);
    y = extension_graticuleY(x0, x1, precision);
    X = extension_graticuleX(Y0, Y1, 90);
    Y = extension_graticuleY(X0, X1, precision);
    return graticule;
  };

  return graticule
      .extentMajor([[-180, -90 + extension_src_math_epsilon], [180, 90 - extension_src_math_epsilon]])
      .extentMinor([[-180, -80 - extension_src_math_epsilon], [180, 80 + extension_src_math_epsilon]]);
}

function extension_graticule10() {
  return extension_graticule()();
}

;// ../../node_modules/vega-geo/build/vega-geo.module.js









function extension_vega_geo_module_noop() {}
const extension_cases = [[], [[[1.0, 1.5], [0.5, 1.0]]], [[[1.5, 1.0], [1.0, 1.5]]], [[[1.5, 1.0], [0.5, 1.0]]], [[[1.0, 0.5], [1.5, 1.0]]], [[[1.0, 1.5], [0.5, 1.0]], [[1.0, 0.5], [1.5, 1.0]]], [[[1.0, 0.5], [1.0, 1.5]]], [[[1.0, 0.5], [0.5, 1.0]]], [[[0.5, 1.0], [1.0, 0.5]]], [[[1.0, 1.5], [1.0, 0.5]]], [[[0.5, 1.0], [1.0, 0.5]], [[1.5, 1.0], [1.0, 1.5]]], [[[1.5, 1.0], [1.0, 0.5]]], [[[0.5, 1.0], [1.5, 1.0]]], [[[1.0, 1.5], [1.5, 1.0]]], [[[0.5, 1.0], [1.0, 1.5]]], []];

// Implementation adapted from d3/d3-contour. Thanks!
function extension_contours () {
  var dx = 1,
    dy = 1,
    smooth = smoothLinear;
  function contours(values, tz) {
    return tz.map(value => contour(values, value));
  }

  // Accumulate, smooth contour rings, assign holes to exterior rings.
  // Based on https://github.com/mbostock/shapefile/blob/v0.6.2/shp/polygon.js
  function contour(values, value) {
    var polygons = [],
      holes = [];
    isorings(values, value, ring => {
      smooth(ring, values, value);
      if (extension_vega_geo_module_area(ring) > 0) polygons.push([ring]);else holes.push(ring);
    });
    holes.forEach(hole => {
      for (var i = 0, n = polygons.length, polygon; i < n; ++i) {
        if (extension_contains((polygon = polygons[i])[0], hole) !== -1) {
          polygon.push(hole);
          return;
        }
      }
    });
    return {
      type: 'MultiPolygon',
      value: value,
      coordinates: polygons
    };
  }

  // Marching squares with isolines stitched into rings.
  // Based on https://github.com/topojson/topojson-client/blob/v3.0.0/src/stitch.js
  function isorings(values, value, callback) {
    var fragmentByStart = [],
      fragmentByEnd = [],
      x,
      y,
      t0,
      t1,
      t2,
      t3;

    // Special case for the first row (y = -1, t2 = t3 = 0).
    x = y = -1;
    t1 = values[0] >= value;
    extension_cases[t1 << 1].forEach(stitch);
    while (++x < dx - 1) {
      t0 = t1, t1 = values[x + 1] >= value;
      extension_cases[t0 | t1 << 1].forEach(stitch);
    }
    extension_cases[t1 << 0].forEach(stitch);

    // General case for the intermediate rows.
    while (++y < dy - 1) {
      x = -1;
      t1 = values[y * dx + dx] >= value;
      t2 = values[y * dx] >= value;
      extension_cases[t1 << 1 | t2 << 2].forEach(stitch);
      while (++x < dx - 1) {
        t0 = t1, t1 = values[y * dx + dx + x + 1] >= value;
        t3 = t2, t2 = values[y * dx + x + 1] >= value;
        extension_cases[t0 | t1 << 1 | t2 << 2 | t3 << 3].forEach(stitch);
      }
      extension_cases[t1 | t2 << 3].forEach(stitch);
    }

    // Special case for the last row (y = dy - 1, t0 = t1 = 0).
    x = -1;
    t2 = values[y * dx] >= value;
    extension_cases[t2 << 2].forEach(stitch);
    while (++x < dx - 1) {
      t3 = t2, t2 = values[y * dx + x + 1] >= value;
      extension_cases[t2 << 2 | t3 << 3].forEach(stitch);
    }
    extension_cases[t2 << 3].forEach(stitch);
    function stitch(line) {
      var start = [line[0][0] + x, line[0][1] + y],
        end = [line[1][0] + x, line[1][1] + y],
        startIndex = index(start),
        endIndex = index(end),
        f,
        g;
      if (f = fragmentByEnd[startIndex]) {
        if (g = fragmentByStart[endIndex]) {
          delete fragmentByEnd[f.end];
          delete fragmentByStart[g.start];
          if (f === g) {
            f.ring.push(end);
            callback(f.ring);
          } else {
            fragmentByStart[f.start] = fragmentByEnd[g.end] = {
              start: f.start,
              end: g.end,
              ring: f.ring.concat(g.ring)
            };
          }
        } else {
          delete fragmentByEnd[f.end];
          f.ring.push(end);
          fragmentByEnd[f.end = endIndex] = f;
        }
      } else if (f = fragmentByStart[endIndex]) {
        if (g = fragmentByEnd[startIndex]) {
          delete fragmentByStart[f.start];
          delete fragmentByEnd[g.end];
          if (f === g) {
            f.ring.push(end);
            callback(f.ring);
          } else {
            fragmentByStart[g.start] = fragmentByEnd[f.end] = {
              start: g.start,
              end: f.end,
              ring: g.ring.concat(f.ring)
            };
          }
        } else {
          delete fragmentByStart[f.start];
          f.ring.unshift(start);
          fragmentByStart[f.start = startIndex] = f;
        }
      } else {
        fragmentByStart[startIndex] = fragmentByEnd[endIndex] = {
          start: startIndex,
          end: endIndex,
          ring: [start, end]
        };
      }
    }
  }
  function index(point) {
    return point[0] * 2 + point[1] * (dx + 1) * 4;
  }
  function smoothLinear(ring, values, value) {
    ring.forEach(point => {
      var x = point[0],
        y = point[1],
        xt = x | 0,
        yt = y | 0,
        v0,
        v1 = values[yt * dx + xt];
      if (x > 0 && x < dx && xt === x) {
        v0 = values[yt * dx + xt - 1];
        point[0] = x + (value - v0) / (v1 - v0) - 0.5;
      }
      if (y > 0 && y < dy && yt === y) {
        v0 = values[(yt - 1) * dx + xt];
        point[1] = y + (value - v0) / (v1 - v0) - 0.5;
      }
    });
  }
  contours.contour = contour;
  contours.size = function (_) {
    if (!arguments.length) return [dx, dy];
    var _0 = Math.floor(_[0]),
      _1 = Math.floor(_[1]);
    if (!(_0 >= 0 && _1 >= 0)) extension_vega_util_module_error('invalid size');
    return dx = _0, dy = _1, contours;
  };
  contours.smooth = function (_) {
    return arguments.length ? (smooth = _ ? smoothLinear : extension_vega_geo_module_noop, contours) : smooth === smoothLinear;
  };
  return contours;
}
function extension_vega_geo_module_area(ring) {
  var i = 0,
    n = ring.length,
    area = ring[n - 1][1] * ring[0][0] - ring[n - 1][0] * ring[0][1];
  while (++i < n) area += ring[i - 1][1] * ring[i][0] - ring[i - 1][0] * ring[i][1];
  return area;
}
function extension_contains(ring, hole) {
  var i = -1,
    n = hole.length,
    c;
  while (++i < n) if (c = extension_ringContains(ring, hole[i])) return c;
  return 0;
}
function extension_ringContains(ring, point) {
  var x = point[0],
    y = point[1],
    contains = -1;
  for (var i = 0, n = ring.length, j = n - 1; i < n; j = i++) {
    var pi = ring[i],
      xi = pi[0],
      yi = pi[1],
      pj = ring[j],
      xj = pj[0],
      yj = pj[1];
    if (extension_segmentContains(pi, pj, point)) return 0;
    if (yi > y !== yj > y && x < (xj - xi) * (y - yi) / (yj - yi) + xi) contains = -contains;
  }
  return contains;
}
function extension_segmentContains(a, b, c) {
  var i;
  return extension_collinear(a, b, c) && extension_within(a[i = +(a[0] === b[0])], c[i], b[i]);
}
function extension_collinear(a, b, c) {
  return (b[0] - a[0]) * (c[1] - a[1]) === (c[0] - a[0]) * (b[1] - a[1]);
}
function extension_within(p, q, r) {
  return p <= q && q <= r || r <= q && q <= p;
}

function extension_vega_geo_module_quantize (k, nice, zero) {
  return function (values) {
    var ex = extension_extent(values),
      start = zero ? Math.min(ex[0], 0) : ex[0],
      stop = ex[1],
      span = stop - start,
      step = nice ? extension_tickStep(start, stop, k) : span / (k + 1);
    return extension_range_range(start + step, stop, step);
  };
}

/**
 * Generate isocontours (level sets) based on input raster grid data.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} [params.field] - The field with raster grid
 *   data. If unspecified, the tuple itself is interpreted as a raster grid.
 * @param {Array<number>} [params.thresholds] - Contour threshold array. If
 *   specified, the levels, nice, resolve, and zero parameters are ignored.
 * @param {number} [params.levels] - The desired number of contour levels.
 * @param {boolean} [params.nice] - Boolean flag indicating if the contour
 *   threshold values should be automatically aligned to "nice"
 *   human-friendly values. Setting this flag may cause the number of
 *   thresholds to deviate from the specified levels.
 * @param {string} [params.resolve] - The method for resolving thresholds
 *   across multiple input grids. If 'independent' (the default), threshold
 *   calculation will be performed separately for each grid. If 'shared', a
 *   single set of threshold values will be used for all input grids.
 * @param {boolean} [params.zero] - Boolean flag indicating if the contour
 *   threshold values should include zero.
 * @param {boolean} [params.smooth] - Boolean flag indicating if the contour
 *   polygons should be smoothed using linear interpolation. The default is
 *   true. The parameter is ignored when using density estimation.
 * @param {boolean} [params.scale] - Optional numerical value by which to
 *   scale the output isocontour coordinates. This parameter can be useful
 *   to scale the contours to match a desired output resolution.
 * @param {string} [params.as='contour'] - The output field in which to store
 *   the generated isocontour data (default 'contour').
 */
function extension_Isocontour(params) {
  extension_Transform.call(this, null, params);
}
extension_Isocontour.Definition = {
  'type': 'Isocontour',
  'metadata': {
    'generates': true
  },
  'params': [{
    'name': 'field',
    'type': 'field'
  }, {
    'name': 'thresholds',
    'type': 'number',
    'array': true
  }, {
    'name': 'levels',
    'type': 'number'
  }, {
    'name': 'nice',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'resolve',
    'type': 'enum',
    'values': ['shared', 'independent'],
    'default': 'independent'
  }, {
    'name': 'zero',
    'type': 'boolean',
    'default': true
  }, {
    'name': 'smooth',
    'type': 'boolean',
    'default': true
  }, {
    'name': 'scale',
    'type': 'number',
    'expr': true
  }, {
    'name': 'translate',
    'type': 'number',
    'array': true,
    'expr': true
  }, {
    'name': 'as',
    'type': 'string',
    'null': true,
    'default': 'contour'
  }]
};
extension_inherits(extension_Isocontour, extension_Transform, {
  transform(_, pulse) {
    if (this.value && !pulse.changed() && !_.modified()) {
      return pulse.StopPropagation;
    }
    var out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS),
      source = pulse.materialize(pulse.SOURCE).source,
      field = _.field || extension_vega_util_module_identity,
      contour = extension_contours().smooth(_.smooth !== false),
      tz = _.thresholds || extension_levels(source, field, _),
      as = _.as === null ? null : _.as || 'contour',
      values = [];
    source.forEach(t => {
      const grid = field(t);

      // generate contour paths in GeoJSON format
      const paths = contour.size([grid.width, grid.height])(grid.values, extension_vega_util_module_isArray(tz) ? tz : tz(grid.values));

      // adjust contour path coordinates as needed
      extension_transformPaths(paths, grid, t, _);

      // ingest; copy source data properties to output
      paths.forEach(p => {
        values.push(extension_rederive(t, extension_ingest$1(as != null ? {
          [as]: p
        } : p)));
      });
    });
    if (this.value) out.rem = this.value;
    this.value = out.source = out.add = values;
    return out;
  }
});
function extension_levels(values, f, _) {
  const q = extension_vega_geo_module_quantize(_.levels || 10, _.nice, _.zero !== false);
  return _.resolve !== 'shared' ? q : q(values.map(t => extension_max_max(f(t).values)));
}
function extension_transformPaths(paths, grid, datum, _) {
  let s = _.scale || grid.scale,
    t = _.translate || grid.translate;
  if (extension_vega_util_module_isFunction(s)) s = s(datum, _);
  if (extension_vega_util_module_isFunction(t)) t = t(datum, _);
  if ((s === 1 || s == null) && !t) return;
  const sx = (extension_vega_util_module_isNumber(s) ? s : s[0]) || 1,
    sy = (extension_vega_util_module_isNumber(s) ? s : s[1]) || 1,
    tx = t && t[0] || 0,
    ty = t && t[1] || 0;
  paths.forEach(extension_vega_geo_module_transform(grid, sx, sy, tx, ty));
}
function extension_vega_geo_module_transform(grid, sx, sy, tx, ty) {
  const x1 = grid.x1 || 0,
    y1 = grid.y1 || 0,
    flip = sx * sy < 0;
  function transformPolygon(coordinates) {
    coordinates.forEach(transformRing);
  }
  function transformRing(coordinates) {
    if (flip) coordinates.reverse(); // maintain winding order
    coordinates.forEach(transformPoint);
  }
  function transformPoint(coordinates) {
    coordinates[0] = (coordinates[0] - x1) * sx + tx;
    coordinates[1] = (coordinates[1] - y1) * sy + ty;
  }
  return function (geometry) {
    geometry.coordinates.forEach(transformPolygon);
    return geometry;
  };
}

function extension_radius(bw, data, f) {
  const v = bw >= 0 ? bw : extension_estimateBandwidth(data, f);
  return Math.round((Math.sqrt(4 * v * v + 1) - 1) / 2);
}
function extension_vega_geo_module_number(_) {
  return extension_vega_util_module_isFunction(_) ? _ : extension_vega_util_module_constant(+_);
}

// Implementation adapted from d3/d3-contour. Thanks!
function extension_density2D () {
  var x = d => d[0],
    y = d => d[1],
    weight = extension_one,
    bandwidth = [-1, -1],
    dx = 960,
    dy = 500,
    k = 2; // log2(cellSize)

  function density(data, counts) {
    const rx = extension_radius(bandwidth[0], data, x) >> k,
      // blur x-radius
      ry = extension_radius(bandwidth[1], data, y) >> k,
      // blur y-radius
      ox = rx ? rx + 2 : 0,
      // x-offset padding for blur
      oy = ry ? ry + 2 : 0,
      // y-offset padding for blur
      n = 2 * ox + (dx >> k),
      // grid width
      m = 2 * oy + (dy >> k),
      // grid height
      values0 = new Float32Array(n * m),
      values1 = new Float32Array(n * m);
    let values = values0;
    data.forEach(d => {
      const xi = ox + (+x(d) >> k),
        yi = oy + (+y(d) >> k);
      if (xi >= 0 && xi < n && yi >= 0 && yi < m) {
        values0[xi + yi * n] += +weight(d);
      }
    });
    if (rx > 0 && ry > 0) {
      extension_blurX(n, m, values0, values1, rx);
      extension_blurY(n, m, values1, values0, ry);
      extension_blurX(n, m, values0, values1, rx);
      extension_blurY(n, m, values1, values0, ry);
      extension_blurX(n, m, values0, values1, rx);
      extension_blurY(n, m, values1, values0, ry);
    } else if (rx > 0) {
      extension_blurX(n, m, values0, values1, rx);
      extension_blurX(n, m, values1, values0, rx);
      extension_blurX(n, m, values0, values1, rx);
      values = values1;
    } else if (ry > 0) {
      extension_blurY(n, m, values0, values1, ry);
      extension_blurY(n, m, values1, values0, ry);
      extension_blurY(n, m, values0, values1, ry);
      values = values1;
    }

    // scale density estimates
    // density in points per square pixel or probability density
    const s = counts ? Math.pow(2, -2 * k) : 1 / extension_sum_sum(values);
    for (let i = 0, sz = n * m; i < sz; ++i) values[i] *= s;
    return {
      values: values,
      scale: 1 << k,
      width: n,
      height: m,
      x1: ox,
      y1: oy,
      x2: ox + (dx >> k),
      y2: oy + (dy >> k)
    };
  }
  density.x = function (_) {
    return arguments.length ? (x = extension_vega_geo_module_number(_), density) : x;
  };
  density.y = function (_) {
    return arguments.length ? (y = extension_vega_geo_module_number(_), density) : y;
  };
  density.weight = function (_) {
    return arguments.length ? (weight = extension_vega_geo_module_number(_), density) : weight;
  };
  density.size = function (_) {
    if (!arguments.length) return [dx, dy];
    var _0 = +_[0],
      _1 = +_[1];
    if (!(_0 >= 0 && _1 >= 0)) extension_vega_util_module_error('invalid size');
    return dx = _0, dy = _1, density;
  };
  density.cellSize = function (_) {
    if (!arguments.length) return 1 << k;
    if (!((_ = +_) >= 1)) extension_vega_util_module_error('invalid cell size');
    k = Math.floor(Math.log(_) / Math.LN2);
    return density;
  };
  density.bandwidth = function (_) {
    if (!arguments.length) return bandwidth;
    _ = extension_vega_util_module_array(_);
    if (_.length === 1) _ = [+_[0], +_[0]];
    if (_.length !== 2) extension_vega_util_module_error('invalid bandwidth');
    return bandwidth = _, density;
  };
  return density;
}
function extension_blurX(n, m, source, target, r) {
  const w = (r << 1) + 1;
  for (let j = 0; j < m; ++j) {
    for (let i = 0, sr = 0; i < n + r; ++i) {
      if (i < n) {
        sr += source[i + j * n];
      }
      if (i >= r) {
        if (i >= w) {
          sr -= source[i - w + j * n];
        }
        target[i - r + j * n] = sr / Math.min(i + 1, n - 1 + w - i, w);
      }
    }
  }
}
function extension_blurY(n, m, source, target, r) {
  const w = (r << 1) + 1;
  for (let i = 0; i < n; ++i) {
    for (let j = 0, sr = 0; j < m + r; ++j) {
      if (j < m) {
        sr += source[i + j * n];
      }
      if (j >= r) {
        if (j >= w) {
          sr -= source[i + (j - w) * n];
        }
        target[i + (j - r) * n] = sr / Math.min(j + 1, m - 1 + w - j, w);
      }
    }
  }
}

/**
 * Perform 2D kernel-density estimation of point data.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<number>} params.size - The [width, height] extent (in
 *   units of input pixels) over which to perform density estimation.
 * @param {function(object): number} params.x - The x-coordinate accessor.
 * @param {function(object): number} params.y - The y-coordinate accessor.
 * @param {function(object): number} [params.weight] - The weight accessor.
 * @param {Array<function(object): *>} [params.groupby] - An array of accessors
 *   to groupby.
 * @param {number} [params.cellSize] - Contour density calculation cell size.
 *   This parameter determines the level of spatial approximation. For example,
 *   the default value of 4 maps to 2x reductions in both x- and y- dimensions.
 *   A value of 1 will result in an output raster grid whose dimensions exactly
 *   matches the size parameter.
 * @param {Array<number>} [params.bandwidth] - The KDE kernel bandwidths,
 *   in pixels. The input can be a two-element array specifying separate
 *   x and y bandwidths, or a single-element array specifying both. If the
 *   bandwidth is unspecified or less than zero, the bandwidth will be
 *   automatically determined.
 * @param {boolean} [params.counts=false] - A boolean flag indicating if the
 *   output values should be probability estimates (false, default) or
 *   smoothed counts (true).
 * @param {string} [params.as='grid'] - The output field in which to store
 *   the generated raster grid (default 'grid').
 */
function extension_KDE2D(params) {
  extension_Transform.call(this, null, params);
}
extension_KDE2D.Definition = {
  'type': 'KDE2D',
  'metadata': {
    'generates': true
  },
  'params': [{
    'name': 'size',
    'type': 'number',
    'array': true,
    'length': 2,
    'required': true
  }, {
    'name': 'x',
    'type': 'field',
    'required': true
  }, {
    'name': 'y',
    'type': 'field',
    'required': true
  }, {
    'name': 'weight',
    'type': 'field'
  }, {
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'cellSize',
    'type': 'number'
  }, {
    'name': 'bandwidth',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'counts',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'as',
    'type': 'string',
    'default': 'grid'
  }]
};
const extension_PARAMS = ['x', 'y', 'weight', 'size', 'cellSize', 'bandwidth'];
function extension_params(obj, _) {
  extension_PARAMS.forEach(param => _[param] != null ? obj[param](_[param]) : 0);
  return obj;
}
extension_inherits(extension_KDE2D, extension_Transform, {
  transform(_, pulse) {
    if (this.value && !pulse.changed() && !_.modified()) return pulse.StopPropagation;
    var out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS),
      source = pulse.materialize(pulse.SOURCE).source,
      groups = extension_vega_geo_module_partition(source, _.groupby),
      names = (_.groupby || []).map(extension_accessorName),
      kde = extension_params(extension_density2D(), _),
      as = _.as || 'grid',
      values = [];
    function set(t, vals) {
      for (let i = 0; i < names.length; ++i) t[names[i]] = vals[i];
      return t;
    }

    // generate density raster grids
    values = groups.map(g => extension_ingest$1(set({
      [as]: kde(g, _.counts)
    }, g.dims)));
    if (this.value) out.rem = this.value;
    this.value = out.source = out.add = values;
    return out;
  }
});
function extension_vega_geo_module_partition(data, groupby) {
  var groups = [],
    get = f => f(t),
    map,
    i,
    n,
    t,
    k,
    g;

  // partition data points into groups
  if (groupby == null) {
    groups.push(data);
  } else {
    for (map = {}, i = 0, n = data.length; i < n; ++i) {
      t = data[i];
      k = groupby.map(get);
      g = map[k];
      if (!g) {
        map[k] = g = [];
        g.dims = k;
        groups.push(g);
      }
      g.push(t);
    }
  }
  return groups;
}

/**
 * Generate contours based on kernel-density estimation of point data.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<number>} params.size - The dimensions [width, height] over which to compute contours.
 *  If the values parameter is provided, this must be the dimensions of the input data.
 *  If density estimation is performed, this is the output view dimensions in pixels.
 * @param {Array<number>} [params.values] - An array of numeric values representing an
 *  width x height grid of values over which to compute contours. If unspecified, this
 *  transform will instead attempt to compute contours for the kernel density estimate
 *  using values drawn from data tuples in the input pulse.
 * @param {function(object): number} [params.x] - The pixel x-coordinate accessor for density estimation.
 * @param {function(object): number} [params.y] - The pixel y-coordinate accessor for density estimation.
 * @param {function(object): number} [params.weight] - The data point weight accessor for density estimation.
 * @param {number} [params.cellSize] - Contour density calculation cell size.
 * @param {number} [params.bandwidth] - Kernel density estimation bandwidth.
 * @param {Array<number>} [params.thresholds] - Contour threshold array. If
 *   this parameter is set, the count and nice parameters will be ignored.
 * @param {number} [params.count] - The desired number of contours.
 * @param {boolean} [params.nice] - Boolean flag indicating if the contour
 *   threshold values should be automatically aligned to "nice"
 *   human-friendly values. Setting this flag may cause the number of
 *   thresholds to deviate from the specified count.
 * @param {boolean} [params.smooth] - Boolean flag indicating if the contour
 *   polygons should be smoothed using linear interpolation. The default is
 *   true. The parameter is ignored when using density estimation.
 */
function extension_Contour(params) {
  extension_Transform.call(this, null, params);
}
extension_Contour.Definition = {
  'type': 'Contour',
  'metadata': {
    'generates': true
  },
  'params': [{
    'name': 'size',
    'type': 'number',
    'array': true,
    'length': 2,
    'required': true
  }, {
    'name': 'values',
    'type': 'number',
    'array': true
  }, {
    'name': 'x',
    'type': 'field'
  }, {
    'name': 'y',
    'type': 'field'
  }, {
    'name': 'weight',
    'type': 'field'
  }, {
    'name': 'cellSize',
    'type': 'number'
  }, {
    'name': 'bandwidth',
    'type': 'number'
  }, {
    'name': 'count',
    'type': 'number'
  }, {
    'name': 'nice',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'thresholds',
    'type': 'number',
    'array': true
  }, {
    'name': 'smooth',
    'type': 'boolean',
    'default': true
  }]
};
extension_inherits(extension_Contour, extension_Transform, {
  transform(_, pulse) {
    if (this.value && !pulse.changed() && !_.modified()) {
      return pulse.StopPropagation;
    }
    var out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS),
      contour = extension_contours().smooth(_.smooth !== false),
      values = _.values,
      thresh = _.thresholds || extension_vega_geo_module_quantize(_.count || 10, _.nice, !!values),
      size = _.size,
      grid,
      post;
    if (!values) {
      values = pulse.materialize(pulse.SOURCE).source;
      grid = extension_params(extension_density2D(), _)(values, true);
      post = extension_vega_geo_module_transform(grid, grid.scale || 1, grid.scale || 1, 0, 0);
      size = [grid.width, grid.height];
      values = grid.values;
    }
    thresh = extension_vega_util_module_isArray(thresh) ? thresh : thresh(values);
    values = contour.size(size)(values, thresh);
    if (post) values.forEach(post);
    if (this.value) out.rem = this.value;
    this.value = out.source = out.add = (values || []).map(extension_ingest$1);
    return out;
  }
});

const extension_Feature = 'Feature';
const extension_FeatureCollection = 'FeatureCollection';
const extension_MultiPoint = 'MultiPoint';

/**
 * Consolidate an array of [longitude, latitude] points or GeoJSON features
 * into a combined GeoJSON object. This transform is particularly useful for
 * combining geo data for a Projection's fit argument. The resulting GeoJSON
 * data is available as this transform's value. Input pulses are unchanged.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<function(object): *>} [params.fields] - A two-element array
 *   of field accessors for the longitude and latitude values.
 * @param {function(object): *} params.geojson - A field accessor for
 *   retrieving GeoJSON feature data.
 */
function extension_GeoJSON(params) {
  extension_Transform.call(this, null, params);
}
extension_GeoJSON.Definition = {
  'type': 'GeoJSON',
  'metadata': {},
  'params': [{
    'name': 'fields',
    'type': 'field',
    'array': true,
    'length': 2
  }, {
    'name': 'geojson',
    'type': 'field'
  }]
};
extension_inherits(extension_GeoJSON, extension_Transform, {
  transform(_, pulse) {
    var features = this._features,
      points = this._points,
      fields = _.fields,
      lon = fields && fields[0],
      lat = fields && fields[1],
      geojson = _.geojson || !fields && extension_vega_util_module_identity,
      flag = pulse.ADD,
      mod;
    mod = _.modified() || pulse.changed(pulse.REM) || pulse.modified(extension_accessorFields(geojson)) || lon && pulse.modified(extension_accessorFields(lon)) || lat && pulse.modified(extension_accessorFields(lat));
    if (!this.value || mod) {
      flag = pulse.SOURCE;
      this._features = features = [];
      this._points = points = [];
    }
    if (geojson) {
      pulse.visit(flag, t => features.push(geojson(t)));
    }
    if (lon && lat) {
      pulse.visit(flag, t => {
        var x = lon(t),
          y = lat(t);
        if (x != null && y != null && (x = +x) === x && (y = +y) === y) {
          points.push([x, y]);
        }
      });
      features = features.concat({
        type: extension_Feature,
        geometry: {
          type: extension_MultiPoint,
          coordinates: points
        }
      });
    }
    this.value = {
      type: extension_FeatureCollection,
      features: features
    };
  }
});

/**
 * Map GeoJSON data to an SVG path string.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(number, number): *} params.projection - The cartographic
 *   projection to apply.
 * @param {function(object): *} [params.field] - The field with GeoJSON data,
 *   or null if the tuple itself is a GeoJSON feature.
 * @param {string} [params.as='path'] - The output field in which to store
 *   the generated path data (default 'path').
 */
function extension_GeoPath(params) {
  extension_Transform.call(this, null, params);
}
extension_GeoPath.Definition = {
  'type': 'GeoPath',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'projection',
    'type': 'projection'
  }, {
    'name': 'field',
    'type': 'field'
  }, {
    'name': 'pointRadius',
    'type': 'number',
    'expr': true
  }, {
    'name': 'as',
    'type': 'string',
    'default': 'path'
  }]
};
extension_inherits(extension_GeoPath, extension_Transform, {
  transform(_, pulse) {
    var out = pulse.fork(pulse.ALL),
      path = this.value,
      field = _.field || extension_vega_util_module_identity,
      as = _.as || 'path',
      flag = out.SOURCE;
    if (!path || _.modified()) {
      // parameters updated, reset and reflow
      this.value = path = extension_getProjectionPath(_.projection);
      out.materialize().reflow();
    } else {
      flag = field === extension_vega_util_module_identity || pulse.modified(field.fields) ? out.ADD_MOD : out.ADD;
    }
    const prev = extension_initPath(path, _.pointRadius);
    out.visit(flag, t => t[as] = path(field(t)));
    path.pointRadius(prev);
    return out.modifies(as);
  }
});
function extension_initPath(path, pointRadius) {
  const prev = path.pointRadius();
  path.context(null);
  if (pointRadius != null) {
    path.pointRadius(pointRadius);
  }
  return prev;
}

/**
 * Geo-code a longitude/latitude point to an x/y coordinate.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(number, number): *} params.projection - The cartographic
 *   projection to apply.
 * @param {Array<function(object): *>} params.fields - A two-element array of
 *   field accessors for the longitude and latitude values.
 * @param {Array<string>} [params.as] - A two-element array of field names
 *   under which to store the result. Defaults to ['x','y'].
 */
function extension_GeoPoint(params) {
  extension_Transform.call(this, null, params);
}
extension_GeoPoint.Definition = {
  'type': 'GeoPoint',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'projection',
    'type': 'projection',
    'required': true
  }, {
    'name': 'fields',
    'type': 'field',
    'array': true,
    'required': true,
    'length': 2
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': 2,
    'default': ['x', 'y']
  }]
};
extension_inherits(extension_GeoPoint, extension_Transform, {
  transform(_, pulse) {
    var proj = _.projection,
      lon = _.fields[0],
      lat = _.fields[1],
      as = _.as || ['x', 'y'],
      x = as[0],
      y = as[1],
      mod;
    function set(t) {
      const xy = proj([lon(t), lat(t)]);
      if (xy) {
        t[x] = xy[0];
        t[y] = xy[1];
      } else {
        t[x] = undefined;
        t[y] = undefined;
      }
    }
    if (_.modified()) {
      // parameters updated, reflow
      pulse = pulse.materialize().reflow(true).visit(pulse.SOURCE, set);
    } else {
      mod = pulse.modified(lon.fields) || pulse.modified(lat.fields);
      pulse.visit(mod ? pulse.ADD_MOD : pulse.ADD, set);
    }
    return pulse.modifies(as);
  }
});

/**
 * Annotate items with a geopath shape generator.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(number, number): *} params.projection - The cartographic
 *   projection to apply.
 * @param {function(object): *} [params.field] - The field with GeoJSON data,
 *   or null if the tuple itself is a GeoJSON feature.
 * @param {string} [params.as='shape'] - The output field in which to store
 *   the generated path data (default 'shape').
 */
function extension_GeoShape(params) {
  extension_Transform.call(this, null, params);
}
extension_GeoShape.Definition = {
  'type': 'GeoShape',
  'metadata': {
    'modifies': true,
    'nomod': true
  },
  'params': [{
    'name': 'projection',
    'type': 'projection'
  }, {
    'name': 'field',
    'type': 'field',
    'default': 'datum'
  }, {
    'name': 'pointRadius',
    'type': 'number',
    'expr': true
  }, {
    'name': 'as',
    'type': 'string',
    'default': 'shape'
  }]
};
extension_inherits(extension_GeoShape, extension_Transform, {
  transform(_, pulse) {
    var out = pulse.fork(pulse.ALL),
      shape = this.value,
      as = _.as || 'shape',
      flag = out.ADD;
    if (!shape || _.modified()) {
      // parameters updated, reset and reflow
      this.value = shape = extension_shapeGenerator(extension_getProjectionPath(_.projection), _.field || extension_vega_util_module_field('datum'), _.pointRadius);
      out.materialize().reflow();
      flag = out.SOURCE;
    }
    out.visit(flag, t => t[as] = shape);
    return out.modifies(as);
  }
});
function extension_shapeGenerator(path, field, pointRadius) {
  const shape = pointRadius == null ? _ => path(field(_)) : _ => {
    var prev = path.pointRadius(),
      value = path.pointRadius(pointRadius)(field(_));
    path.pointRadius(prev);
    return value;
  };
  shape.context = _ => {
    path.context(_);
    return shape;
  };
  return shape;
}

/**
 * GeoJSON feature generator for creating graticules.
 * @constructor
 */
function extension_Graticule(params) {
  extension_Transform.call(this, [], params);
  this.generator = extension_graticule();
}
extension_Graticule.Definition = {
  'type': 'Graticule',
  'metadata': {
    'changes': true,
    'generates': true
  },
  'params': [{
    'name': 'extent',
    'type': 'array',
    'array': true,
    'length': 2,
    'content': {
      'type': 'number',
      'array': true,
      'length': 2
    }
  }, {
    'name': 'extentMajor',
    'type': 'array',
    'array': true,
    'length': 2,
    'content': {
      'type': 'number',
      'array': true,
      'length': 2
    }
  }, {
    'name': 'extentMinor',
    'type': 'array',
    'array': true,
    'length': 2,
    'content': {
      'type': 'number',
      'array': true,
      'length': 2
    }
  }, {
    'name': 'step',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'stepMajor',
    'type': 'number',
    'array': true,
    'length': 2,
    'default': [90, 360]
  }, {
    'name': 'stepMinor',
    'type': 'number',
    'array': true,
    'length': 2,
    'default': [10, 10]
  }, {
    'name': 'precision',
    'type': 'number',
    'default': 2.5
  }]
};
extension_inherits(extension_Graticule, extension_Transform, {
  transform(_, pulse) {
    var src = this.value,
      gen = this.generator,
      t;
    if (!src.length || _.modified()) {
      for (const prop in _) {
        if (extension_vega_util_module_isFunction(gen[prop])) {
          gen[prop](_[prop]);
        }
      }
    }
    t = gen();
    if (src.length) {
      pulse.mod.push(extension_replace(src[0], t));
    } else {
      pulse.add.push(extension_ingest$1(t));
    }
    src[0] = t;
    return pulse;
  }
});

/**
 * Render a heatmap image for input raster grid data.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} [params.field] - The field with raster grid
 *   data. If unspecified, the tuple itself is interpreted as a raster grid.
 * @param {string} [params.color] - A constant color value or function for
 *   individual pixel color. If a function, it will be invoked with an input
 *   object that includes $x, $y, $value, and $max fields for the grid.
 * @param {number} [params.opacity] - A constant opacity value or function for
 *   individual pixel opacity. If a function, it will be invoked with an input
 *   object that includes $x, $y, $value, and $max fields for the grid.
 * @param {string} [params.resolve] - The method for resolving maximum values
 *   across multiple input grids. If 'independent' (the default), maximum
 *   calculation will be performed separately for each grid. If 'shared',
 *   a single global maximum will be used for all input grids.
 * @param {string} [params.as='image'] - The output field in which to store
 *   the generated bitmap canvas images (default 'image').
 */
function extension_Heatmap(params) {
  extension_Transform.call(this, null, params);
}
extension_Heatmap.Definition = {
  'type': 'heatmap',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'field',
    'type': 'field'
  }, {
    'name': 'color',
    'type': 'string',
    'expr': true
  }, {
    'name': 'opacity',
    'type': 'number',
    'expr': true
  }, {
    'name': 'resolve',
    'type': 'enum',
    'values': ['shared', 'independent'],
    'default': 'independent'
  }, {
    'name': 'as',
    'type': 'string',
    'default': 'image'
  }]
};
extension_inherits(extension_Heatmap, extension_Transform, {
  transform(_, pulse) {
    if (!pulse.changed() && !_.modified()) {
      return pulse.StopPropagation;
    }
    var source = pulse.materialize(pulse.SOURCE).source,
      shared = _.resolve === 'shared',
      field = _.field || extension_vega_util_module_identity,
      opacity = extension_opacity_(_.opacity, _),
      color = extension_color_(_.color, _),
      as = _.as || 'image',
      obj = {
        $x: 0,
        $y: 0,
        $value: 0,
        $max: shared ? extension_max_max(source.map(t => extension_max_max(field(t).values))) : 0
      };
    source.forEach(t => {
      const v = field(t);

      // build proxy data object
      const o = extension_extend({}, t, obj);
      // set maximum value if not globally shared
      if (!shared) o.$max = extension_max_max(v.values || []);

      // generate canvas image
      // optimize color/opacity if not pixel-dependent
      t[as] = extension_toCanvas(v, o, color.dep ? color : extension_vega_util_module_constant(color(o)), opacity.dep ? opacity : extension_vega_util_module_constant(opacity(o)));
    });
    return pulse.reflow(true).modifies(as);
  }
});

// get image color function
function extension_color_(color, _) {
  let f;
  if (extension_vega_util_module_isFunction(color)) {
    f = obj => extension_color_rgb(color(obj, _));
    f.dep = extension_dependency(color);
  } else {
    // default to mid-grey
    f = extension_vega_util_module_constant(extension_color_rgb(color || '#888'));
  }
  return f;
}

// get image opacity function
function extension_opacity_(opacity, _) {
  let f;
  if (extension_vega_util_module_isFunction(opacity)) {
    f = obj => opacity(obj, _);
    f.dep = extension_dependency(opacity);
  } else if (opacity) {
    f = extension_vega_util_module_constant(opacity);
  } else {
    // default to [0, max] opacity gradient
    f = obj => obj.$value / obj.$max || 0;
    f.dep = true;
  }
  return f;
}

// check if function depends on individual pixel data
function extension_dependency(f) {
  if (!extension_vega_util_module_isFunction(f)) return false;
  const set = extension_toSet(extension_accessorFields(f));
  return set.$x || set.$y || set.$value || set.$max;
}

// render raster grid to canvas
function extension_toCanvas(grid, obj, color, opacity) {
  const n = grid.width,
    m = grid.height,
    x1 = grid.x1 || 0,
    y1 = grid.y1 || 0,
    x2 = grid.x2 || n,
    y2 = grid.y2 || m,
    val = grid.values,
    value = val ? i => val[i] : extension_zero,
    can = extension_domCanvas(x2 - x1, y2 - y1),
    ctx = can.getContext('2d'),
    img = ctx.getImageData(0, 0, x2 - x1, y2 - y1),
    pix = img.data;
  for (let j = y1, k = 0; j < y2; ++j) {
    obj.$y = j - y1;
    for (let i = x1, r = j * n; i < x2; ++i, k += 4) {
      obj.$x = i - x1;
      obj.$value = value(i + r);
      const v = color(obj);
      pix[k + 0] = v.r;
      pix[k + 1] = v.g;
      pix[k + 2] = v.b;
      pix[k + 3] = ~~(255 * opacity(obj));
    }
  }
  ctx.putImageData(img, 0, 0);
  return can;
}

/**
 * Maintains a cartographic projection.
 * @constructor
 * @param {object} params - The parameters for this operator.
 */
function extension_Projection(params) {
  extension_Transform.call(this, null, params);
  this.modified(true); // always treat as modified
}
extension_inherits(extension_Projection, extension_Transform, {
  transform(_, pulse) {
    let proj = this.value;
    if (!proj || _.modified('type')) {
      this.value = proj = extension_vega_geo_module_create(_.type);
      extension_projectionProperties.forEach(prop => {
        if (_[prop] != null) extension_vega_geo_module_set(proj, prop, _[prop]);
      });
    } else {
      extension_projectionProperties.forEach(prop => {
        if (_.modified(prop)) extension_vega_geo_module_set(proj, prop, _[prop]);
      });
    }
    if (_.pointRadius != null) proj.path.pointRadius(_.pointRadius);
    if (_.fit) extension_vega_geo_module_fit(proj, _);
    return pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS);
  }
});
function extension_vega_geo_module_fit(proj, _) {
  const data = extension_collectGeoJSON(_.fit);
  _.extent ? proj.fitExtent(_.extent, data) : _.size ? proj.fitSize(_.size, data) : 0;
}
function extension_vega_geo_module_create(type) {
  const constructor = extension_vega_projection_module_projection((type || 'mercator').toLowerCase());
  if (!constructor) extension_vega_util_module_error('Unrecognized projection type: ' + type);
  return constructor();
}
function extension_vega_geo_module_set(proj, key, value) {
  if (extension_vega_util_module_isFunction(proj[key])) proj[key](value);
}
function extension_collectGeoJSON(data) {
  data = extension_vega_util_module_array(data);
  return data.length === 1 ? data[0] : {
    type: extension_FeatureCollection,
    features: data.reduce((a, f) => a.concat(extension_featurize(f)), [])
  };
}
function extension_featurize(f) {
  return f.type === extension_FeatureCollection ? f.features : extension_vega_util_module_array(f).filter(d => d != null).map(d => d.type === extension_Feature ? d : {
    type: extension_Feature,
    geometry: d
  });
}



;// ../../node_modules/d3-force/src/center.js
/* harmony default export */ function extension_center(x, y) {
  var nodes, strength = 1;

  if (x == null) x = 0;
  if (y == null) y = 0;

  function force() {
    var i,
        n = nodes.length,
        node,
        sx = 0,
        sy = 0;

    for (i = 0; i < n; ++i) {
      node = nodes[i], sx += node.x, sy += node.y;
    }

    for (sx = (sx / n - x) * strength, sy = (sy / n - y) * strength, i = 0; i < n; ++i) {
      node = nodes[i], node.x -= sx, node.y -= sy;
    }
  }

  force.initialize = function(_) {
    nodes = _;
  };

  force.x = function(_) {
    return arguments.length ? (x = +_, force) : x;
  };

  force.y = function(_) {
    return arguments.length ? (y = +_, force) : y;
  };

  force.strength = function(_) {
    return arguments.length ? (strength = +_, force) : strength;
  };

  return force;
}

;// ../../node_modules/d3-quadtree/src/add.js
/* harmony default export */ function extension_src_add(d) {
  const x = +this._x.call(null, d),
      y = +this._y.call(null, d);
  return extension_add_add(this.cover(x, y), x, y, d);
}

function extension_add_add(tree, x, y, d) {
  if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points

  var parent,
      node = tree._root,
      leaf = {data: d},
      x0 = tree._x0,
      y0 = tree._y0,
      x1 = tree._x1,
      y1 = tree._y1,
      xm,
      ym,
      xp,
      yp,
      right,
      bottom,
      i,
      j;

  // If the tree is empty, initialize the root as a leaf.
  if (!node) return tree._root = leaf, tree;

  // Find the existing leaf for the new point, or add it.
  while (node.length) {
    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
    if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;
  }

  // Is the new point is exactly coincident with the existing point?
  xp = +tree._x.call(null, node.data);
  yp = +tree._y.call(null, node.data);
  if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;

  // Otherwise, split the leaf node until the old and new point are separated.
  do {
    parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);
    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
  } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));
  return parent[j] = node, parent[i] = leaf, tree;
}

function extension_addAll(data) {
  var d, i, n = data.length,
      x,
      y,
      xz = new Array(n),
      yz = new Array(n),
      x0 = Infinity,
      y0 = Infinity,
      x1 = -Infinity,
      y1 = -Infinity;

  // Compute the points and their extent.
  for (i = 0; i < n; ++i) {
    if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;
    xz[i] = x;
    yz[i] = y;
    if (x < x0) x0 = x;
    if (x > x1) x1 = x;
    if (y < y0) y0 = y;
    if (y > y1) y1 = y;
  }

  // If there were no (valid) points, abort.
  if (x0 > x1 || y0 > y1) return this;

  // Expand the tree to cover the new points.
  this.cover(x0, y0).cover(x1, y1);

  // Add the new points.
  for (i = 0; i < n; ++i) {
    extension_add_add(this, xz[i], yz[i], data[i]);
  }

  return this;
}

;// ../../node_modules/d3-quadtree/src/cover.js
/* harmony default export */ function extension_cover(x, y) {
  if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points

  var x0 = this._x0,
      y0 = this._y0,
      x1 = this._x1,
      y1 = this._y1;

  // If the quadtree has no extent, initialize them.
  // Integer extent are necessary so that if we later double the extent,
  // the existing quadrant boundaries don’t change due to floating point error!
  if (isNaN(x0)) {
    x1 = (x0 = Math.floor(x)) + 1;
    y1 = (y0 = Math.floor(y)) + 1;
  }

  // Otherwise, double repeatedly to cover.
  else {
    var z = x1 - x0 || 1,
        node = this._root,
        parent,
        i;

    while (x0 > x || x >= x1 || y0 > y || y >= y1) {
      i = (y < y0) << 1 | (x < x0);
      parent = new Array(4), parent[i] = node, node = parent, z *= 2;
      switch (i) {
        case 0: x1 = x0 + z, y1 = y0 + z; break;
        case 1: x0 = x1 - z, y1 = y0 + z; break;
        case 2: x1 = x0 + z, y0 = y1 - z; break;
        case 3: x0 = x1 - z, y0 = y1 - z; break;
      }
    }

    if (this._root && this._root.length) this._root = node;
  }

  this._x0 = x0;
  this._y0 = y0;
  this._x1 = x1;
  this._y1 = y1;
  return this;
}

;// ../../node_modules/d3-quadtree/src/data.js
/* harmony default export */ function extension_src_data() {
  var data = [];
  this.visit(function(node) {
    if (!node.length) do data.push(node.data); while (node = node.next)
  });
  return data;
}

;// ../../node_modules/d3-quadtree/src/extent.js
/* harmony default export */ function extension_src_extent(_) {
  return arguments.length
      ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])
      : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];
}

;// ../../node_modules/d3-quadtree/src/quad.js
/* harmony default export */ function extension_src_quad(node, x0, y0, x1, y1) {
  this.node = node;
  this.x0 = x0;
  this.y0 = y0;
  this.x1 = x1;
  this.y1 = y1;
}

;// ../../node_modules/d3-quadtree/src/find.js


/* harmony default export */ function extension_src_find(x, y, radius) {
  var data,
      x0 = this._x0,
      y0 = this._y0,
      x1,
      y1,
      x2,
      y2,
      x3 = this._x1,
      y3 = this._y1,
      quads = [],
      node = this._root,
      q,
      i;

  if (node) quads.push(new extension_src_quad(node, x0, y0, x3, y3));
  if (radius == null) radius = Infinity;
  else {
    x0 = x - radius, y0 = y - radius;
    x3 = x + radius, y3 = y + radius;
    radius *= radius;
  }

  while (q = quads.pop()) {

    // Stop searching if this quadrant can’t contain a closer node.
    if (!(node = q.node)
        || (x1 = q.x0) > x3
        || (y1 = q.y0) > y3
        || (x2 = q.x1) < x0
        || (y2 = q.y1) < y0) continue;

    // Bisect the current quadrant.
    if (node.length) {
      var xm = (x1 + x2) / 2,
          ym = (y1 + y2) / 2;

      quads.push(
        new extension_src_quad(node[3], xm, ym, x2, y2),
        new extension_src_quad(node[2], x1, ym, xm, y2),
        new extension_src_quad(node[1], xm, y1, x2, ym),
        new extension_src_quad(node[0], x1, y1, xm, ym)
      );

      // Visit the closest quadrant first.
      if (i = (y >= ym) << 1 | (x >= xm)) {
        q = quads[quads.length - 1];
        quads[quads.length - 1] = quads[quads.length - 1 - i];
        quads[quads.length - 1 - i] = q;
      }
    }

    // Visit this point. (Visiting coincident points isn’t necessary!)
    else {
      var dx = x - +this._x.call(null, node.data),
          dy = y - +this._y.call(null, node.data),
          d2 = dx * dx + dy * dy;
      if (d2 < radius) {
        var d = Math.sqrt(radius = d2);
        x0 = x - d, y0 = y - d;
        x3 = x + d, y3 = y + d;
        data = node.data;
      }
    }
  }

  return data;
}

;// ../../node_modules/d3-quadtree/src/remove.js
/* harmony default export */ function extension_remove(d) {
  if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points

  var parent,
      node = this._root,
      retainer,
      previous,
      next,
      x0 = this._x0,
      y0 = this._y0,
      x1 = this._x1,
      y1 = this._y1,
      x,
      y,
      xm,
      ym,
      right,
      bottom,
      i,
      j;

  // If the tree is empty, initialize the root as a leaf.
  if (!node) return this;

  // Find the leaf node for the point.
  // While descending, also retain the deepest parent with a non-removed sibling.
  if (node.length) while (true) {
    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
    if (!(parent = node, node = node[i = bottom << 1 | right])) return this;
    if (!node.length) break;
    if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;
  }

  // Find the point to remove.
  while (node.data !== d) if (!(previous = node, node = node.next)) return this;
  if (next = node.next) delete node.next;

  // If there are multiple coincident points, remove just the point.
  if (previous) return (next ? previous.next = next : delete previous.next), this;

  // If this is the root point, remove it.
  if (!parent) return this._root = next, this;

  // Remove this leaf.
  next ? parent[i] = next : delete parent[i];

  // If the parent now contains exactly one leaf, collapse superfluous parents.
  if ((node = parent[0] || parent[1] || parent[2] || parent[3])
      && node === (parent[3] || parent[2] || parent[1] || parent[0])
      && !node.length) {
    if (retainer) retainer[j] = node;
    else this._root = node;
  }

  return this;
}

function extension_removeAll(data) {
  for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
  return this;
}

;// ../../node_modules/d3-quadtree/src/root.js
/* harmony default export */ function extension_root() {
  return this._root;
}

;// ../../node_modules/d3-quadtree/src/size.js
/* harmony default export */ function extension_size() {
  var size = 0;
  this.visit(function(node) {
    if (!node.length) do ++size; while (node = node.next)
  });
  return size;
}

;// ../../node_modules/d3-quadtree/src/visit.js


/* harmony default export */ function extension_src_visit(callback) {
  var quads = [], q, node = this._root, child, x0, y0, x1, y1;
  if (node) quads.push(new extension_src_quad(node, this._x0, this._y0, this._x1, this._y1));
  while (q = quads.pop()) {
    if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {
      var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
      if (child = node[3]) quads.push(new extension_src_quad(child, xm, ym, x1, y1));
      if (child = node[2]) quads.push(new extension_src_quad(child, x0, ym, xm, y1));
      if (child = node[1]) quads.push(new extension_src_quad(child, xm, y0, x1, ym));
      if (child = node[0]) quads.push(new extension_src_quad(child, x0, y0, xm, ym));
    }
  }
  return this;
}

;// ../../node_modules/d3-quadtree/src/visitAfter.js


/* harmony default export */ function extension_visitAfter(callback) {
  var quads = [], next = [], q;
  if (this._root) quads.push(new extension_src_quad(this._root, this._x0, this._y0, this._x1, this._y1));
  while (q = quads.pop()) {
    var node = q.node;
    if (node.length) {
      var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
      if (child = node[0]) quads.push(new extension_src_quad(child, x0, y0, xm, ym));
      if (child = node[1]) quads.push(new extension_src_quad(child, xm, y0, x1, ym));
      if (child = node[2]) quads.push(new extension_src_quad(child, x0, ym, xm, y1));
      if (child = node[3]) quads.push(new extension_src_quad(child, xm, ym, x1, y1));
    }
    next.push(q);
  }
  while (q = next.pop()) {
    callback(q.node, q.x0, q.y0, q.x1, q.y1);
  }
  return this;
}

;// ../../node_modules/d3-quadtree/src/x.js
function extension_defaultX(d) {
  return d[0];
}

/* harmony default export */ function extension_src_x(_) {
  return arguments.length ? (this._x = _, this) : this._x;
}

;// ../../node_modules/d3-quadtree/src/y.js
function extension_defaultY(d) {
  return d[1];
}

/* harmony default export */ function extension_src_y(_) {
  return arguments.length ? (this._y = _, this) : this._y;
}

;// ../../node_modules/d3-quadtree/src/quadtree.js













function extension_quadtree(nodes, x, y) {
  var tree = new extension_Quadtree(x == null ? extension_defaultX : x, y == null ? extension_defaultY : y, NaN, NaN, NaN, NaN);
  return nodes == null ? tree : tree.addAll(nodes);
}

function extension_Quadtree(x, y, x0, y0, x1, y1) {
  this._x = x;
  this._y = y;
  this._x0 = x0;
  this._y0 = y0;
  this._x1 = x1;
  this._y1 = y1;
  this._root = undefined;
}

function extension_leaf_copy(leaf) {
  var copy = {data: leaf.data}, next = copy;
  while (leaf = leaf.next) next = next.next = {data: leaf.data};
  return copy;
}

var extension_treeProto = extension_quadtree.prototype = extension_Quadtree.prototype;

extension_treeProto.copy = function() {
  var copy = new extension_Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),
      node = this._root,
      nodes,
      child;

  if (!node) return copy;

  if (!node.length) return copy._root = extension_leaf_copy(node), copy;

  nodes = [{source: node, target: copy._root = new Array(4)}];
  while (node = nodes.pop()) {
    for (var i = 0; i < 4; ++i) {
      if (child = node.source[i]) {
        if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});
        else node.target[i] = extension_leaf_copy(child);
      }
    }
  }

  return copy;
};

extension_treeProto.add = extension_src_add;
extension_treeProto.addAll = extension_addAll;
extension_treeProto.cover = extension_cover;
extension_treeProto.data = extension_src_data;
extension_treeProto.extent = extension_src_extent;
extension_treeProto.find = extension_src_find;
extension_treeProto.remove = extension_remove;
extension_treeProto.removeAll = extension_removeAll;
extension_treeProto.root = extension_root;
extension_treeProto.size = extension_size;
extension_treeProto.visit = extension_src_visit;
extension_treeProto.visitAfter = extension_visitAfter;
extension_treeProto.x = extension_src_x;
extension_treeProto.y = extension_src_y;

;// ../../node_modules/d3-force/src/constant.js
/* harmony default export */ function extension_d3_force_src_constant(x) {
  return function() {
    return x;
  };
}

;// ../../node_modules/d3-force/src/jiggle.js
/* harmony default export */ function extension_jiggle(random) {
  return (random() - 0.5) * 1e-6;
}

;// ../../node_modules/d3-force/src/collide.js




function extension_collide_x(d) {
  return d.x + d.vx;
}

function extension_collide_y(d) {
  return d.y + d.vy;
}

/* harmony default export */ function extension_collide(radius) {
  var nodes,
      radii,
      random,
      strength = 1,
      iterations = 1;

  if (typeof radius !== "function") radius = extension_d3_force_src_constant(radius == null ? 1 : +radius);

  function force() {
    var i, n = nodes.length,
        tree,
        node,
        xi,
        yi,
        ri,
        ri2;

    for (var k = 0; k < iterations; ++k) {
      tree = extension_quadtree(nodes, extension_collide_x, extension_collide_y).visitAfter(prepare);
      for (i = 0; i < n; ++i) {
        node = nodes[i];
        ri = radii[node.index], ri2 = ri * ri;
        xi = node.x + node.vx;
        yi = node.y + node.vy;
        tree.visit(apply);
      }
    }

    function apply(quad, x0, y0, x1, y1) {
      var data = quad.data, rj = quad.r, r = ri + rj;
      if (data) {
        if (data.index > node.index) {
          var x = xi - data.x - data.vx,
              y = yi - data.y - data.vy,
              l = x * x + y * y;
          if (l < r * r) {
            if (x === 0) x = extension_jiggle(random), l += x * x;
            if (y === 0) y = extension_jiggle(random), l += y * y;
            l = (r - (l = Math.sqrt(l))) / l * strength;
            node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj));
            node.vy += (y *= l) * r;
            data.vx -= x * (r = 1 - r);
            data.vy -= y * r;
          }
        }
        return;
      }
      return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r;
    }
  }

  function prepare(quad) {
    if (quad.data) return quad.r = radii[quad.data.index];
    for (var i = quad.r = 0; i < 4; ++i) {
      if (quad[i] && quad[i].r > quad.r) {
        quad.r = quad[i].r;
      }
    }
  }

  function initialize() {
    if (!nodes) return;
    var i, n = nodes.length, node;
    radii = new Array(n);
    for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes);
  }

  force.initialize = function(_nodes, _random) {
    nodes = _nodes;
    random = _random;
    initialize();
  };

  force.iterations = function(_) {
    return arguments.length ? (iterations = +_, force) : iterations;
  };

  force.strength = function(_) {
    return arguments.length ? (strength = +_, force) : strength;
  };

  force.radius = function(_) {
    return arguments.length ? (radius = typeof _ === "function" ? _ : extension_d3_force_src_constant(+_), initialize(), force) : radius;
  };

  return force;
}

;// ../../node_modules/d3-dispatch/src/dispatch.js
var extension_dispatch_noop = {value: () => {}};

function extension_dispatch_dispatch() {
  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
    if (!(t = arguments[i] + "") || (t in _) || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
    _[t] = [];
  }
  return new extension_Dispatch(_);
}

function extension_Dispatch(_) {
  this._ = _;
}

function extension_parseTypenames(typenames, types) {
  return typenames.trim().split(/^|\s+/).map(function(t) {
    var name = "", i = t.indexOf(".");
    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
    if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
    return {type: t, name: name};
  });
}

extension_Dispatch.prototype = extension_dispatch_dispatch.prototype = {
  constructor: extension_Dispatch,
  on: function(typename, callback) {
    var _ = this._,
        T = extension_parseTypenames(typename + "", _),
        t,
        i = -1,
        n = T.length;

    // If no callback was specified, return the callback of the given type and name.
    if (arguments.length < 2) {
      while (++i < n) if ((t = (typename = T[i]).type) && (t = extension_dispatch_get(_[t], typename.name))) return t;
      return;
    }

    // If a type was specified, set the callback for the given type and name.
    // Otherwise, if a null callback was specified, remove callbacks of the given name.
    if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
    while (++i < n) {
      if (t = (typename = T[i]).type) _[t] = extension_dispatch_set(_[t], typename.name, callback);
      else if (callback == null) for (t in _) _[t] = extension_dispatch_set(_[t], typename.name, null);
    }

    return this;
  },
  copy: function() {
    var copy = {}, _ = this._;
    for (var t in _) copy[t] = _[t].slice();
    return new extension_Dispatch(copy);
  },
  call: function(type, that) {
    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
    for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
  },
  apply: function(type, that, args) {
    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
  }
};

function extension_dispatch_get(type, name) {
  for (var i = 0, n = type.length, c; i < n; ++i) {
    if ((c = type[i]).name === name) {
      return c.value;
    }
  }
}

function extension_dispatch_set(type, name, callback) {
  for (var i = 0, n = type.length; i < n; ++i) {
    if (type[i].name === name) {
      type[i] = extension_dispatch_noop, type = type.slice(0, i).concat(type.slice(i + 1));
      break;
    }
  }
  if (callback != null) type.push({name: name, value: callback});
  return type;
}

/* harmony default export */ const extension_src_dispatch = (extension_dispatch_dispatch);

;// ../../node_modules/d3-timer/src/timer.js
var extension_timer_frame = 0, // is an animation frame pending?
    extension_timeout = 0, // is a timeout pending?
    extension_interval = 0, // are any timers active?
    extension_pokeDelay = 1000, // how frequently we check for clock skew
    extension_taskHead,
    extension_taskTail,
    extension_clockLast = 0,
    extension_clockNow = 0,
    extension_clockSkew = 0,
    extension_clock = typeof performance === "object" && performance.now ? performance : Date,
    extension_setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };

function extension_timer_now() {
  return extension_clockNow || (extension_setFrame(extension_clearNow), extension_clockNow = extension_clock.now() + extension_clockSkew);
}

function extension_clearNow() {
  extension_clockNow = 0;
}

function extension_Timer() {
  this._call =
  this._time =
  this._next = null;
}

extension_Timer.prototype = extension_timer.prototype = {
  constructor: extension_Timer,
  restart: function(callback, delay, time) {
    if (typeof callback !== "function") throw new TypeError("callback is not a function");
    time = (time == null ? extension_timer_now() : +time) + (delay == null ? 0 : +delay);
    if (!this._next && extension_taskTail !== this) {
      if (extension_taskTail) extension_taskTail._next = this;
      else extension_taskHead = this;
      extension_taskTail = this;
    }
    this._call = callback;
    this._time = time;
    extension_sleep();
  },
  stop: function() {
    if (this._call) {
      this._call = null;
      this._time = Infinity;
      extension_sleep();
    }
  }
};

function extension_timer(callback, delay, time) {
  var t = new extension_Timer;
  t.restart(callback, delay, time);
  return t;
}

function extension_timerFlush() {
  extension_timer_now(); // Get the current time, if not already set.
  ++extension_timer_frame; // Pretend we’ve set an alarm, if we haven’t already.
  var t = extension_taskHead, e;
  while (t) {
    if ((e = extension_clockNow - t._time) >= 0) t._call.call(undefined, e);
    t = t._next;
  }
  --extension_timer_frame;
}

function extension_wake() {
  extension_clockNow = (extension_clockLast = extension_clock.now()) + extension_clockSkew;
  extension_timer_frame = extension_timeout = 0;
  try {
    extension_timerFlush();
  } finally {
    extension_timer_frame = 0;
    extension_nap();
    extension_clockNow = 0;
  }
}

function extension_poke() {
  var now = extension_clock.now(), delay = now - extension_clockLast;
  if (delay > extension_pokeDelay) extension_clockSkew -= delay, extension_clockLast = now;
}

function extension_nap() {
  var t0, t1 = extension_taskHead, t2, time = Infinity;
  while (t1) {
    if (t1._call) {
      if (time > t1._time) time = t1._time;
      t0 = t1, t1 = t1._next;
    } else {
      t2 = t1._next, t1._next = null;
      t1 = t0 ? t0._next = t2 : extension_taskHead = t2;
    }
  }
  extension_taskTail = t0;
  extension_sleep(time);
}

function extension_sleep(time) {
  if (extension_timer_frame) return; // Soonest alarm already set, or will be.
  if (extension_timeout) extension_timeout = clearTimeout(extension_timeout);
  var delay = time - extension_clockNow; // Strictly less than if we recomputed clockNow.
  if (delay > 24) {
    if (time < Infinity) extension_timeout = setTimeout(extension_wake, time - extension_clock.now() - extension_clockSkew);
    if (extension_interval) extension_interval = clearInterval(extension_interval);
  } else {
    if (!extension_interval) extension_clockLast = extension_clock.now(), extension_interval = setInterval(extension_poke, extension_pokeDelay);
    extension_timer_frame = 1, extension_setFrame(extension_wake);
  }
}

;// ../../node_modules/d3-force/src/lcg.js
// https://en.wikipedia.org/wiki/Linear_congruential_generator#Parameters_in_common_use
const extension_lcg_a = 1664525;
const extension_lcg_c = 1013904223;
const extension_m = 4294967296; // 2^32

/* harmony default export */ function extension_src_lcg() {
  let s = 1;
  return () => (s = (extension_lcg_a * s + extension_lcg_c) % extension_m) / extension_m;
}

;// ../../node_modules/d3-force/src/simulation.js




function extension_simulation_x(d) {
  return d.x;
}

function extension_simulation_y(d) {
  return d.y;
}

var extension_initialRadius = 10,
    extension_initialAngle = Math.PI * (3 - Math.sqrt(5));

/* harmony default export */ function extension_simulation(nodes) {
  var simulation,
      alpha = 1,
      alphaMin = 0.001,
      alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),
      alphaTarget = 0,
      velocityDecay = 0.6,
      forces = new Map(),
      stepper = extension_timer(step),
      event = extension_src_dispatch("tick", "end"),
      random = extension_src_lcg();

  if (nodes == null) nodes = [];

  function step() {
    tick();
    event.call("tick", simulation);
    if (alpha < alphaMin) {
      stepper.stop();
      event.call("end", simulation);
    }
  }

  function tick(iterations) {
    var i, n = nodes.length, node;

    if (iterations === undefined) iterations = 1;

    for (var k = 0; k < iterations; ++k) {
      alpha += (alphaTarget - alpha) * alphaDecay;

      forces.forEach(function(force) {
        force(alpha);
      });

      for (i = 0; i < n; ++i) {
        node = nodes[i];
        if (node.fx == null) node.x += node.vx *= velocityDecay;
        else node.x = node.fx, node.vx = 0;
        if (node.fy == null) node.y += node.vy *= velocityDecay;
        else node.y = node.fy, node.vy = 0;
      }
    }

    return simulation;
  }

  function initializeNodes() {
    for (var i = 0, n = nodes.length, node; i < n; ++i) {
      node = nodes[i], node.index = i;
      if (node.fx != null) node.x = node.fx;
      if (node.fy != null) node.y = node.fy;
      if (isNaN(node.x) || isNaN(node.y)) {
        var radius = extension_initialRadius * Math.sqrt(0.5 + i), angle = i * extension_initialAngle;
        node.x = radius * Math.cos(angle);
        node.y = radius * Math.sin(angle);
      }
      if (isNaN(node.vx) || isNaN(node.vy)) {
        node.vx = node.vy = 0;
      }
    }
  }

  function initializeForce(force) {
    if (force.initialize) force.initialize(nodes, random);
    return force;
  }

  initializeNodes();

  return simulation = {
    tick: tick,

    restart: function() {
      return stepper.restart(step), simulation;
    },

    stop: function() {
      return stepper.stop(), simulation;
    },

    nodes: function(_) {
      return arguments.length ? (nodes = _, initializeNodes(), forces.forEach(initializeForce), simulation) : nodes;
    },

    alpha: function(_) {
      return arguments.length ? (alpha = +_, simulation) : alpha;
    },

    alphaMin: function(_) {
      return arguments.length ? (alphaMin = +_, simulation) : alphaMin;
    },

    alphaDecay: function(_) {
      return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;
    },

    alphaTarget: function(_) {
      return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;
    },

    velocityDecay: function(_) {
      return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;
    },

    randomSource: function(_) {
      return arguments.length ? (random = _, forces.forEach(initializeForce), simulation) : random;
    },

    force: function(name, _) {
      return arguments.length > 1 ? ((_ == null ? forces.delete(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);
    },

    find: function(x, y, radius) {
      var i = 0,
          n = nodes.length,
          dx,
          dy,
          d2,
          node,
          closest;

      if (radius == null) radius = Infinity;
      else radius *= radius;

      for (i = 0; i < n; ++i) {
        node = nodes[i];
        dx = x - node.x;
        dy = y - node.y;
        d2 = dx * dx + dy * dy;
        if (d2 < radius) closest = node, radius = d2;
      }

      return closest;
    },

    on: function(name, _) {
      return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
    }
  };
}

;// ../../node_modules/d3-force/src/manyBody.js





/* harmony default export */ function extension_manyBody() {
  var nodes,
      node,
      random,
      alpha,
      strength = extension_d3_force_src_constant(-30),
      strengths,
      distanceMin2 = 1,
      distanceMax2 = Infinity,
      theta2 = 0.81;

  function force(_) {
    var i, n = nodes.length, tree = extension_quadtree(nodes, extension_simulation_x, extension_simulation_y).visitAfter(accumulate);
    for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);
  }

  function initialize() {
    if (!nodes) return;
    var i, n = nodes.length, node;
    strengths = new Array(n);
    for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);
  }

  function accumulate(quad) {
    var strength = 0, q, c, weight = 0, x, y, i;

    // For internal nodes, accumulate forces from child quadrants.
    if (quad.length) {
      for (x = y = i = 0; i < 4; ++i) {
        if ((q = quad[i]) && (c = Math.abs(q.value))) {
          strength += q.value, weight += c, x += c * q.x, y += c * q.y;
        }
      }
      quad.x = x / weight;
      quad.y = y / weight;
    }

    // For leaf nodes, accumulate forces from coincident quadrants.
    else {
      q = quad;
      q.x = q.data.x;
      q.y = q.data.y;
      do strength += strengths[q.data.index];
      while (q = q.next);
    }

    quad.value = strength;
  }

  function apply(quad, x1, _, x2) {
    if (!quad.value) return true;

    var x = quad.x - node.x,
        y = quad.y - node.y,
        w = x2 - x1,
        l = x * x + y * y;

    // Apply the Barnes-Hut approximation if possible.
    // Limit forces for very close nodes; randomize direction if coincident.
    if (w * w / theta2 < l) {
      if (l < distanceMax2) {
        if (x === 0) x = extension_jiggle(random), l += x * x;
        if (y === 0) y = extension_jiggle(random), l += y * y;
        if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
        node.vx += x * quad.value * alpha / l;
        node.vy += y * quad.value * alpha / l;
      }
      return true;
    }

    // Otherwise, process points directly.
    else if (quad.length || l >= distanceMax2) return;

    // Limit forces for very close nodes; randomize direction if coincident.
    if (quad.data !== node || quad.next) {
      if (x === 0) x = extension_jiggle(random), l += x * x;
      if (y === 0) y = extension_jiggle(random), l += y * y;
      if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
    }

    do if (quad.data !== node) {
      w = strengths[quad.data.index] * alpha / l;
      node.vx += x * w;
      node.vy += y * w;
    } while (quad = quad.next);
  }

  force.initialize = function(_nodes, _random) {
    nodes = _nodes;
    random = _random;
    initialize();
  };

  force.strength = function(_) {
    return arguments.length ? (strength = typeof _ === "function" ? _ : extension_d3_force_src_constant(+_), initialize(), force) : strength;
  };

  force.distanceMin = function(_) {
    return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);
  };

  force.distanceMax = function(_) {
    return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);
  };

  force.theta = function(_) {
    return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);
  };

  return force;
}

;// ../../node_modules/d3-force/src/link.js



function extension_index(d) {
  return d.index;
}

function extension_link_find(nodeById, nodeId) {
  var node = nodeById.get(nodeId);
  if (!node) throw new Error("node not found: " + nodeId);
  return node;
}

/* harmony default export */ function extension_src_link(links) {
  var id = extension_index,
      strength = defaultStrength,
      strengths,
      distance = extension_d3_force_src_constant(30),
      distances,
      nodes,
      count,
      bias,
      random,
      iterations = 1;

  if (links == null) links = [];

  function defaultStrength(link) {
    return 1 / Math.min(count[link.source.index], count[link.target.index]);
  }

  function force(alpha) {
    for (var k = 0, n = links.length; k < iterations; ++k) {
      for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {
        link = links[i], source = link.source, target = link.target;
        x = target.x + target.vx - source.x - source.vx || extension_jiggle(random);
        y = target.y + target.vy - source.y - source.vy || extension_jiggle(random);
        l = Math.sqrt(x * x + y * y);
        l = (l - distances[i]) / l * alpha * strengths[i];
        x *= l, y *= l;
        target.vx -= x * (b = bias[i]);
        target.vy -= y * b;
        source.vx += x * (b = 1 - b);
        source.vy += y * b;
      }
    }
  }

  function initialize() {
    if (!nodes) return;

    var i,
        n = nodes.length,
        m = links.length,
        nodeById = new Map(nodes.map((d, i) => [id(d, i, nodes), d])),
        link;

    for (i = 0, count = new Array(n); i < m; ++i) {
      link = links[i], link.index = i;
      if (typeof link.source !== "object") link.source = extension_link_find(nodeById, link.source);
      if (typeof link.target !== "object") link.target = extension_link_find(nodeById, link.target);
      count[link.source.index] = (count[link.source.index] || 0) + 1;
      count[link.target.index] = (count[link.target.index] || 0) + 1;
    }

    for (i = 0, bias = new Array(m); i < m; ++i) {
      link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);
    }

    strengths = new Array(m), initializeStrength();
    distances = new Array(m), initializeDistance();
  }

  function initializeStrength() {
    if (!nodes) return;

    for (var i = 0, n = links.length; i < n; ++i) {
      strengths[i] = +strength(links[i], i, links);
    }
  }

  function initializeDistance() {
    if (!nodes) return;

    for (var i = 0, n = links.length; i < n; ++i) {
      distances[i] = +distance(links[i], i, links);
    }
  }

  force.initialize = function(_nodes, _random) {
    nodes = _nodes;
    random = _random;
    initialize();
  };

  force.links = function(_) {
    return arguments.length ? (links = _, initialize(), force) : links;
  };

  force.id = function(_) {
    return arguments.length ? (id = _, force) : id;
  };

  force.iterations = function(_) {
    return arguments.length ? (iterations = +_, force) : iterations;
  };

  force.strength = function(_) {
    return arguments.length ? (strength = typeof _ === "function" ? _ : extension_d3_force_src_constant(+_), initializeStrength(), force) : strength;
  };

  force.distance = function(_) {
    return arguments.length ? (distance = typeof _ === "function" ? _ : extension_d3_force_src_constant(+_), initializeDistance(), force) : distance;
  };

  return force;
}

;// ../../node_modules/d3-force/src/x.js


/* harmony default export */ function extension_d3_force_src_x(x) {
  var strength = extension_d3_force_src_constant(0.1),
      nodes,
      strengths,
      xz;

  if (typeof x !== "function") x = extension_d3_force_src_constant(x == null ? 0 : +x);

  function force(alpha) {
    for (var i = 0, n = nodes.length, node; i < n; ++i) {
      node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha;
    }
  }

  function initialize() {
    if (!nodes) return;
    var i, n = nodes.length;
    strengths = new Array(n);
    xz = new Array(n);
    for (i = 0; i < n; ++i) {
      strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
    }
  }

  force.initialize = function(_) {
    nodes = _;
    initialize();
  };

  force.strength = function(_) {
    return arguments.length ? (strength = typeof _ === "function" ? _ : extension_d3_force_src_constant(+_), initialize(), force) : strength;
  };

  force.x = function(_) {
    return arguments.length ? (x = typeof _ === "function" ? _ : extension_d3_force_src_constant(+_), initialize(), force) : x;
  };

  return force;
}

;// ../../node_modules/d3-force/src/y.js


/* harmony default export */ function extension_d3_force_src_y(y) {
  var strength = extension_d3_force_src_constant(0.1),
      nodes,
      strengths,
      yz;

  if (typeof y !== "function") y = extension_d3_force_src_constant(y == null ? 0 : +y);

  function force(alpha) {
    for (var i = 0, n = nodes.length, node; i < n; ++i) {
      node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha;
    }
  }

  function initialize() {
    if (!nodes) return;
    var i, n = nodes.length;
    strengths = new Array(n);
    yz = new Array(n);
    for (i = 0; i < n; ++i) {
      strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
    }
  }

  force.initialize = function(_) {
    nodes = _;
    initialize();
  };

  force.strength = function(_) {
    return arguments.length ? (strength = typeof _ === "function" ? _ : extension_d3_force_src_constant(+_), initialize(), force) : strength;
  };

  force.y = function(_) {
    return arguments.length ? (y = typeof _ === "function" ? _ : extension_d3_force_src_constant(+_), initialize(), force) : y;
  };

  return force;
}

;// ../../node_modules/vega-force/build/vega-force.module.js




const extension_ForceMap = {
  center: extension_center,
  collide: extension_collide,
  nbody: extension_manyBody,
  link: extension_src_link,
  x: extension_d3_force_src_x,
  y: extension_d3_force_src_y
};
const extension_Forces = 'forces',
  extension_ForceParams = ['alpha', 'alphaMin', 'alphaTarget', 'velocityDecay', 'forces'],
  extension_ForceConfig = ['static', 'iterations'],
  extension_ForceOutput = ['x', 'y', 'vx', 'vy'];

/**
 * Force simulation layout.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<object>} params.forces - The forces to apply.
 */
function extension_Force(params) {
  extension_Transform.call(this, null, params);
}
extension_Force.Definition = {
  'type': 'Force',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'static',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'restart',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'iterations',
    'type': 'number',
    'default': 300
  }, {
    'name': 'alpha',
    'type': 'number',
    'default': 1
  }, {
    'name': 'alphaMin',
    'type': 'number',
    'default': 0.001
  }, {
    'name': 'alphaTarget',
    'type': 'number',
    'default': 0
  }, {
    'name': 'velocityDecay',
    'type': 'number',
    'default': 0.4
  }, {
    'name': 'forces',
    'type': 'param',
    'array': true,
    'params': [{
      'key': {
        'force': 'center'
      },
      'params': [{
        'name': 'x',
        'type': 'number',
        'default': 0
      }, {
        'name': 'y',
        'type': 'number',
        'default': 0
      }]
    }, {
      'key': {
        'force': 'collide'
      },
      'params': [{
        'name': 'radius',
        'type': 'number',
        'expr': true
      }, {
        'name': 'strength',
        'type': 'number',
        'default': 0.7
      }, {
        'name': 'iterations',
        'type': 'number',
        'default': 1
      }]
    }, {
      'key': {
        'force': 'nbody'
      },
      'params': [{
        'name': 'strength',
        'type': 'number',
        'default': -30,
        'expr': true
      }, {
        'name': 'theta',
        'type': 'number',
        'default': 0.9
      }, {
        'name': 'distanceMin',
        'type': 'number',
        'default': 1
      }, {
        'name': 'distanceMax',
        'type': 'number'
      }]
    }, {
      'key': {
        'force': 'link'
      },
      'params': [{
        'name': 'links',
        'type': 'data'
      }, {
        'name': 'id',
        'type': 'field'
      }, {
        'name': 'distance',
        'type': 'number',
        'default': 30,
        'expr': true
      }, {
        'name': 'strength',
        'type': 'number',
        'expr': true
      }, {
        'name': 'iterations',
        'type': 'number',
        'default': 1
      }]
    }, {
      'key': {
        'force': 'x'
      },
      'params': [{
        'name': 'strength',
        'type': 'number',
        'default': 0.1
      }, {
        'name': 'x',
        'type': 'field'
      }]
    }, {
      'key': {
        'force': 'y'
      },
      'params': [{
        'name': 'strength',
        'type': 'number',
        'default': 0.1
      }, {
        'name': 'y',
        'type': 'field'
      }]
    }]
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'modify': false,
    'default': extension_ForceOutput
  }]
};
extension_inherits(extension_Force, extension_Transform, {
  transform(_, pulse) {
    var sim = this.value,
      change = pulse.changed(pulse.ADD_REM),
      params = _.modified(extension_ForceParams),
      iters = _.iterations || 300;

    // configure simulation
    if (!sim) {
      this.value = sim = extension_vega_force_module_simulation(pulse.source, _);
      sim.on('tick', extension_rerun(pulse.dataflow, this));
      if (!_.static) {
        change = true;
        sim.tick(); // ensure we run on init
      }
      pulse.modifies('index');
    } else {
      if (change) {
        pulse.modifies('index');
        sim.nodes(pulse.source);
      }
      if (params || pulse.changed(pulse.MOD)) {
        extension_setup(sim, _, 0, pulse);
      }
    }

    // run simulation
    if (params || change || _.modified(extension_ForceConfig) || pulse.changed() && _.restart) {
      sim.alpha(Math.max(sim.alpha(), _.alpha || 1)).alphaDecay(1 - Math.pow(sim.alphaMin(), 1 / iters));
      if (_.static) {
        for (sim.stop(); --iters >= 0;) sim.tick();
      } else {
        if (sim.stopped()) sim.restart();
        if (!change) return pulse.StopPropagation; // defer to sim ticks
      }
    }
    return this.finish(_, pulse);
  },
  finish(_, pulse) {
    const dataflow = pulse.dataflow;

    // inspect dependencies, touch link source data
    for (let args = this._argops, j = 0, m = args.length, arg; j < m; ++j) {
      arg = args[j];
      if (arg.name !== extension_Forces || arg.op._argval.force !== 'link') {
        continue;
      }
      for (var ops = arg.op._argops, i = 0, n = ops.length, op; i < n; ++i) {
        if (ops[i].name === 'links' && (op = ops[i].op.source)) {
          dataflow.pulse(op, dataflow.changeset().reflow());
          break;
        }
      }
    }

    // reflow all nodes
    return pulse.reflow(_.modified()).modifies(extension_ForceOutput);
  }
});
function extension_rerun(df, op) {
  return () => df.touch(op).run();
}
function extension_vega_force_module_simulation(nodes, _) {
  const sim = extension_simulation(nodes),
    stop = sim.stop,
    restart = sim.restart;
  let stopped = false;
  sim.stopped = () => stopped;
  sim.restart = () => (stopped = false, restart());
  sim.stop = () => (stopped = true, stop());
  return extension_setup(sim, _, true).on('end', () => stopped = true);
}
function extension_setup(sim, _, init, pulse) {
  var f = extension_vega_util_module_array(_.forces),
    i,
    n,
    p,
    name;
  for (i = 0, n = extension_ForceParams.length; i < n; ++i) {
    p = extension_ForceParams[i];
    if (p !== extension_Forces && _.modified(p)) sim[p](_[p]);
  }
  for (i = 0, n = f.length; i < n; ++i) {
    name = extension_Forces + i;
    p = init || _.modified(extension_Forces, i) ? extension_getForce(f[i]) : pulse && extension_modified(f[i], pulse) ? sim.force(name) : null;
    if (p) sim.force(name, p);
  }
  for (n = sim.numForces || 0; i < n; ++i) {
    sim.force(extension_Forces + i, null); // remove
  }
  sim.numForces = f.length;
  return sim;
}
function extension_modified(f, pulse) {
  var k, v;
  for (k in f) {
    if (extension_vega_util_module_isFunction(v = f[k]) && pulse.modified(extension_accessorFields(v))) return 1;
  }
  return 0;
}
function extension_getForce(_) {
  var f, p;
  if (!extension_vega_util_module_has(extension_ForceMap, _.force)) {
    extension_vega_util_module_error('Unrecognized force: ' + _.force);
  }
  f = extension_ForceMap[_.force]();
  for (p in _) {
    if (extension_vega_util_module_isFunction(f[p])) extension_setForceParam(f[p], _[p], _);
  }
  return f;
}
function extension_setForceParam(f, v, _) {
  f(extension_vega_util_module_isFunction(v) ? d => v(d, _) : v);
}



;// ../../node_modules/d3-hierarchy/src/hierarchy/count.js
function extension_count_count(node) {
  var sum = 0,
      children = node.children,
      i = children && children.length;
  if (!i) sum = 1;
  else while (--i >= 0) sum += children[i].value;
  node.value = sum;
}

/* harmony default export */ function extension_hierarchy_count() {
  return this.eachAfter(extension_count_count);
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/each.js
/* harmony default export */ function extension_hierarchy_each(callback, that) {
  let index = -1;
  for (const node of this) {
    callback.call(that, node, ++index, this);
  }
  return this;
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/eachBefore.js
/* harmony default export */ function extension_eachBefore(callback, that) {
  var node = this, nodes = [node], children, i, index = -1;
  while (node = nodes.pop()) {
    callback.call(that, node, ++index, this);
    if (children = node.children) {
      for (i = children.length - 1; i >= 0; --i) {
        nodes.push(children[i]);
      }
    }
  }
  return this;
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/eachAfter.js
/* harmony default export */ function extension_eachAfter(callback, that) {
  var node = this, nodes = [node], next = [], children, i, n, index = -1;
  while (node = nodes.pop()) {
    next.push(node);
    if (children = node.children) {
      for (i = 0, n = children.length; i < n; ++i) {
        nodes.push(children[i]);
      }
    }
  }
  while (node = next.pop()) {
    callback.call(that, node, ++index, this);
  }
  return this;
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/find.js
/* harmony default export */ function extension_hierarchy_find(callback, that) {
  let index = -1;
  for (const node of this) {
    if (callback.call(that, node, ++index, this)) {
      return node;
    }
  }
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/sum.js
/* harmony default export */ function extension_hierarchy_sum(value) {
  return this.eachAfter(function(node) {
    var sum = +value(node.data) || 0,
        children = node.children,
        i = children && children.length;
    while (--i >= 0) sum += children[i].value;
    node.value = sum;
  });
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/sort.js
/* harmony default export */ function extension_hierarchy_sort(compare) {
  return this.eachBefore(function(node) {
    if (node.children) {
      node.children.sort(compare);
    }
  });
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/path.js
/* harmony default export */ function extension_hierarchy_path(end) {
  var start = this,
      ancestor = extension_leastCommonAncestor(start, end),
      nodes = [start];
  while (start !== ancestor) {
    start = start.parent;
    nodes.push(start);
  }
  var k = nodes.length;
  while (end !== ancestor) {
    nodes.splice(k, 0, end);
    end = end.parent;
  }
  return nodes;
}

function extension_leastCommonAncestor(a, b) {
  if (a === b) return a;
  var aNodes = a.ancestors(),
      bNodes = b.ancestors(),
      c = null;
  a = aNodes.pop();
  b = bNodes.pop();
  while (a === b) {
    c = a;
    a = aNodes.pop();
    b = bNodes.pop();
  }
  return c;
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/ancestors.js
/* harmony default export */ function extension_ancestors() {
  var node = this, nodes = [node];
  while (node = node.parent) {
    nodes.push(node);
  }
  return nodes;
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/descendants.js
/* harmony default export */ function extension_descendants() {
  return Array.from(this);
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/leaves.js
/* harmony default export */ function extension_leaves() {
  var leaves = [];
  this.eachBefore(function(node) {
    if (!node.children) {
      leaves.push(node);
    }
  });
  return leaves;
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/links.js
/* harmony default export */ function extension_links() {
  var root = this, links = [];
  root.each(function(node) {
    if (node !== root) { // Don’t include the root’s parent, if any.
      links.push({source: node.parent, target: node});
    }
  });
  return links;
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/iterator.js
/* harmony default export */ function* extension_hierarchy_iterator() {
  var node = this, current, next = [node], children, i, n;
  do {
    current = next.reverse(), next = [];
    while (node = current.pop()) {
      yield node;
      if (children = node.children) {
        for (i = 0, n = children.length; i < n; ++i) {
          next.push(children[i]);
        }
      }
    }
  } while (next.length);
}

;// ../../node_modules/d3-hierarchy/src/hierarchy/index.js














function extension_hierarchy(data, children) {
  if (data instanceof Map) {
    data = [undefined, data];
    if (children === undefined) children = extension_mapChildren;
  } else if (children === undefined) {
    children = extension_objectChildren;
  }

  var root = new extension_hierarchy_Node(data),
      node,
      nodes = [root],
      child,
      childs,
      i,
      n;

  while (node = nodes.pop()) {
    if ((childs = children(node.data)) && (n = (childs = Array.from(childs)).length)) {
      node.children = childs;
      for (i = n - 1; i >= 0; --i) {
        nodes.push(child = childs[i] = new extension_hierarchy_Node(childs[i]));
        child.parent = node;
        child.depth = node.depth + 1;
      }
    }
  }

  return root.eachBefore(extension_computeHeight);
}

function extension_node_copy() {
  return extension_hierarchy(this).eachBefore(extension_copyData);
}

function extension_objectChildren(d) {
  return d.children;
}

function extension_mapChildren(d) {
  return Array.isArray(d) ? d[1] : null;
}

function extension_copyData(node) {
  if (node.data.value !== undefined) node.value = node.data.value;
  node.data = node.data.data;
}

function extension_computeHeight(node) {
  var height = 0;
  do node.height = height;
  while ((node = node.parent) && (node.height < ++height));
}

function extension_hierarchy_Node(data) {
  this.data = data;
  this.depth =
  this.height = 0;
  this.parent = null;
}

extension_hierarchy_Node.prototype = extension_hierarchy.prototype = {
  constructor: extension_hierarchy_Node,
  count: extension_hierarchy_count,
  each: extension_hierarchy_each,
  eachAfter: extension_eachAfter,
  eachBefore: extension_eachBefore,
  find: extension_hierarchy_find,
  sum: extension_hierarchy_sum,
  sort: extension_hierarchy_sort,
  path: extension_hierarchy_path,
  ancestors: extension_ancestors,
  descendants: extension_descendants,
  leaves: extension_leaves,
  links: extension_links,
  copy: extension_node_copy,
  [Symbol.iterator]: extension_hierarchy_iterator
};

;// ../../node_modules/d3-hierarchy/src/accessors.js
function extension_optional(f) {
  return f == null ? null : extension_required(f);
}

function extension_required(f) {
  if (typeof f !== "function") throw new Error;
  return f;
}

;// ../../node_modules/d3-hierarchy/src/constant.js
function extension_constantZero() {
  return 0;
}

/* harmony default export */ function extension_d3_hierarchy_src_constant(x) {
  return function() {
    return x;
  };
}

;// ../../node_modules/d3-hierarchy/src/lcg.js
// https://en.wikipedia.org/wiki/Linear_congruential_generator#Parameters_in_common_use
const extension_src_lcg_a = 1664525;
const extension_src_lcg_c = 1013904223;
const extension_lcg_m = 4294967296; // 2^32

/* harmony default export */ function extension_d3_hierarchy_src_lcg() {
  let s = 1;
  return () => (s = (extension_src_lcg_a * s + extension_src_lcg_c) % extension_lcg_m) / extension_lcg_m;
}

;// ../../node_modules/d3-hierarchy/src/array.js
/* harmony default export */ function extension_d3_hierarchy_src_array(x) {
  return typeof x === "object" && "length" in x
    ? x // Array, TypedArray, NodeList, array-like
    : Array.from(x); // Map, Set, iterable, string, or anything else
}

function extension_shuffle(array, random) {
  let m = array.length,
      t,
      i;

  while (m) {
    i = random() * m-- | 0;
    t = array[m];
    array[m] = array[i];
    array[i] = t;
  }

  return array;
}

;// ../../node_modules/d3-hierarchy/src/pack/enclose.js



/* harmony default export */ function extension_enclose(circles) {
  return extension_packEncloseRandom(circles, lcg());
}

function extension_packEncloseRandom(circles, random) {
  var i = 0, n = (circles = extension_shuffle(Array.from(circles), random)).length, B = [], p, e;

  while (i < n) {
    p = circles[i];
    if (e && extension_enclosesWeak(e, p)) ++i;
    else e = extension_encloseBasis(B = extension_extendBasis(B, p)), i = 0;
  }

  return e;
}

function extension_extendBasis(B, p) {
  var i, j;

  if (extension_enclosesWeakAll(p, B)) return [p];

  // If we get here then B must have at least one element.
  for (i = 0; i < B.length; ++i) {
    if (extension_enclosesNot(p, B[i])
        && extension_enclosesWeakAll(extension_encloseBasis2(B[i], p), B)) {
      return [B[i], p];
    }
  }

  // If we get here then B must have at least two elements.
  for (i = 0; i < B.length - 1; ++i) {
    for (j = i + 1; j < B.length; ++j) {
      if (extension_enclosesNot(extension_encloseBasis2(B[i], B[j]), p)
          && extension_enclosesNot(extension_encloseBasis2(B[i], p), B[j])
          && extension_enclosesNot(extension_encloseBasis2(B[j], p), B[i])
          && extension_enclosesWeakAll(extension_encloseBasis3(B[i], B[j], p), B)) {
        return [B[i], B[j], p];
      }
    }
  }

  // If we get here then something is very wrong.
  throw new Error;
}

function extension_enclosesNot(a, b) {
  var dr = a.r - b.r, dx = b.x - a.x, dy = b.y - a.y;
  return dr < 0 || dr * dr < dx * dx + dy * dy;
}

function extension_enclosesWeak(a, b) {
  var dr = a.r - b.r + Math.max(a.r, b.r, 1) * 1e-9, dx = b.x - a.x, dy = b.y - a.y;
  return dr > 0 && dr * dr > dx * dx + dy * dy;
}

function extension_enclosesWeakAll(a, B) {
  for (var i = 0; i < B.length; ++i) {
    if (!extension_enclosesWeak(a, B[i])) {
      return false;
    }
  }
  return true;
}

function extension_encloseBasis(B) {
  switch (B.length) {
    case 1: return extension_encloseBasis1(B[0]);
    case 2: return extension_encloseBasis2(B[0], B[1]);
    case 3: return extension_encloseBasis3(B[0], B[1], B[2]);
  }
}

function extension_encloseBasis1(a) {
  return {
    x: a.x,
    y: a.y,
    r: a.r
  };
}

function extension_encloseBasis2(a, b) {
  var x1 = a.x, y1 = a.y, r1 = a.r,
      x2 = b.x, y2 = b.y, r2 = b.r,
      x21 = x2 - x1, y21 = y2 - y1, r21 = r2 - r1,
      l = Math.sqrt(x21 * x21 + y21 * y21);
  return {
    x: (x1 + x2 + x21 / l * r21) / 2,
    y: (y1 + y2 + y21 / l * r21) / 2,
    r: (l + r1 + r2) / 2
  };
}

function extension_encloseBasis3(a, b, c) {
  var x1 = a.x, y1 = a.y, r1 = a.r,
      x2 = b.x, y2 = b.y, r2 = b.r,
      x3 = c.x, y3 = c.y, r3 = c.r,
      a2 = x1 - x2,
      a3 = x1 - x3,
      b2 = y1 - y2,
      b3 = y1 - y3,
      c2 = r2 - r1,
      c3 = r3 - r1,
      d1 = x1 * x1 + y1 * y1 - r1 * r1,
      d2 = d1 - x2 * x2 - y2 * y2 + r2 * r2,
      d3 = d1 - x3 * x3 - y3 * y3 + r3 * r3,
      ab = a3 * b2 - a2 * b3,
      xa = (b2 * d3 - b3 * d2) / (ab * 2) - x1,
      xb = (b3 * c2 - b2 * c3) / ab,
      ya = (a3 * d2 - a2 * d3) / (ab * 2) - y1,
      yb = (a2 * c3 - a3 * c2) / ab,
      A = xb * xb + yb * yb - 1,
      B = 2 * (r1 + xa * xb + ya * yb),
      C = xa * xa + ya * ya - r1 * r1,
      r = -(Math.abs(A) > 1e-6 ? (B + Math.sqrt(B * B - 4 * A * C)) / (2 * A) : C / B);
  return {
    x: x1 + xa + xb * r,
    y: y1 + ya + yb * r,
    r: r
  };
}

;// ../../node_modules/d3-hierarchy/src/pack/siblings.js




function extension_place(b, a, c) {
  var dx = b.x - a.x, x, a2,
      dy = b.y - a.y, y, b2,
      d2 = dx * dx + dy * dy;
  if (d2) {
    a2 = a.r + c.r, a2 *= a2;
    b2 = b.r + c.r, b2 *= b2;
    if (a2 > b2) {
      x = (d2 + b2 - a2) / (2 * d2);
      y = Math.sqrt(Math.max(0, b2 / d2 - x * x));
      c.x = b.x - x * dx - y * dy;
      c.y = b.y - x * dy + y * dx;
    } else {
      x = (d2 + a2 - b2) / (2 * d2);
      y = Math.sqrt(Math.max(0, a2 / d2 - x * x));
      c.x = a.x + x * dx - y * dy;
      c.y = a.y + x * dy + y * dx;
    }
  } else {
    c.x = a.x + c.r;
    c.y = a.y;
  }
}

function extension_intersects(a, b) {
  var dr = a.r + b.r - 1e-6, dx = b.x - a.x, dy = b.y - a.y;
  return dr > 0 && dr * dr > dx * dx + dy * dy;
}

function extension_score(node) {
  var a = node._,
      b = node.next._,
      ab = a.r + b.r,
      dx = (a.x * b.r + b.x * a.r) / ab,
      dy = (a.y * b.r + b.y * a.r) / ab;
  return dx * dx + dy * dy;
}

function extension_siblings_Node(circle) {
  this._ = circle;
  this.next = null;
  this.previous = null;
}

function extension_packSiblingsRandom(circles, random) {
  if (!(n = (circles = extension_d3_hierarchy_src_array(circles)).length)) return 0;

  var a, b, c, n, aa, ca, i, j, k, sj, sk;

  // Place the first circle.
  a = circles[0], a.x = 0, a.y = 0;
  if (!(n > 1)) return a.r;

  // Place the second circle.
  b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;
  if (!(n > 2)) return a.r + b.r;

  // Place the third circle.
  extension_place(b, a, c = circles[2]);

  // Initialize the front-chain using the first three circles a, b and c.
  a = new extension_siblings_Node(a), b = new extension_siblings_Node(b), c = new extension_siblings_Node(c);
  a.next = c.previous = b;
  b.next = a.previous = c;
  c.next = b.previous = a;

  // Attempt to place each remaining circle…
  pack: for (i = 3; i < n; ++i) {
    extension_place(a._, b._, c = circles[i]), c = new extension_siblings_Node(c);

    // Find the closest intersecting circle on the front-chain, if any.
    // “Closeness” is determined by linear distance along the front-chain.
    // “Ahead” or “behind” is likewise determined by linear distance.
    j = b.next, k = a.previous, sj = b._.r, sk = a._.r;
    do {
      if (sj <= sk) {
        if (extension_intersects(j._, c._)) {
          b = j, a.next = b, b.previous = a, --i;
          continue pack;
        }
        sj += j._.r, j = j.next;
      } else {
        if (extension_intersects(k._, c._)) {
          a = k, a.next = b, b.previous = a, --i;
          continue pack;
        }
        sk += k._.r, k = k.previous;
      }
    } while (j !== k.next);

    // Success! Insert the new circle c between a and b.
    c.previous = a, c.next = b, a.next = b.previous = b = c;

    // Compute the new closest circle pair to the centroid.
    aa = extension_score(a);
    while ((c = c.next) !== b) {
      if ((ca = extension_score(c)) < aa) {
        a = c, aa = ca;
      }
    }
    b = a.next;
  }

  // Compute the enclosing circle of the front chain.
  a = [b._], c = b; while ((c = c.next) !== b) a.push(c._); c = extension_packEncloseRandom(a, random);

  // Translate the circles to put the enclosing circle around the origin.
  for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;

  return c.r;
}

/* harmony default export */ function extension_siblings(circles) {
  extension_packSiblingsRandom(circles, lcg());
  return circles;
}

;// ../../node_modules/d3-hierarchy/src/pack/index.js





function extension_defaultRadius(d) {
  return Math.sqrt(d.value);
}

/* harmony default export */ function extension_pack() {
  var radius = null,
      dx = 1,
      dy = 1,
      padding = extension_constantZero;

  function pack(root) {
    const random = extension_d3_hierarchy_src_lcg();
    root.x = dx / 2, root.y = dy / 2;
    if (radius) {
      root.eachBefore(extension_radiusLeaf(radius))
          .eachAfter(extension_packChildrenRandom(padding, 0.5, random))
          .eachBefore(extension_translateChild(1));
    } else {
      root.eachBefore(extension_radiusLeaf(extension_defaultRadius))
          .eachAfter(extension_packChildrenRandom(extension_constantZero, 1, random))
          .eachAfter(extension_packChildrenRandom(padding, root.r / Math.min(dx, dy), random))
          .eachBefore(extension_translateChild(Math.min(dx, dy) / (2 * root.r)));
    }
    return root;
  }

  pack.radius = function(x) {
    return arguments.length ? (radius = extension_optional(x), pack) : radius;
  };

  pack.size = function(x) {
    return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];
  };

  pack.padding = function(x) {
    return arguments.length ? (padding = typeof x === "function" ? x : extension_d3_hierarchy_src_constant(+x), pack) : padding;
  };

  return pack;
}

function extension_radiusLeaf(radius) {
  return function(node) {
    if (!node.children) {
      node.r = Math.max(0, +radius(node) || 0);
    }
  };
}

function extension_packChildrenRandom(padding, k, random) {
  return function(node) {
    if (children = node.children) {
      var children,
          i,
          n = children.length,
          r = padding(node) * k || 0,
          e;

      if (r) for (i = 0; i < n; ++i) children[i].r += r;
      e = extension_packSiblingsRandom(children, random);
      if (r) for (i = 0; i < n; ++i) children[i].r -= r;
      node.r = e + r;
    }
  };
}

function extension_translateChild(k) {
  return function(node) {
    var parent = node.parent;
    node.r *= k;
    if (parent) {
      node.x = parent.x + k * node.x;
      node.y = parent.y + k * node.y;
    }
  };
}

;// ../../node_modules/d3-hierarchy/src/treemap/round.js
/* harmony default export */ function extension_treemap_round(node) {
  node.x0 = Math.round(node.x0);
  node.y0 = Math.round(node.y0);
  node.x1 = Math.round(node.x1);
  node.y1 = Math.round(node.y1);
}

;// ../../node_modules/d3-hierarchy/src/treemap/dice.js
/* harmony default export */ function extension_dice(parent, x0, y0, x1, y1) {
  var nodes = parent.children,
      node,
      i = -1,
      n = nodes.length,
      k = parent.value && (x1 - x0) / parent.value;

  while (++i < n) {
    node = nodes[i], node.y0 = y0, node.y1 = y1;
    node.x0 = x0, node.x1 = x0 += node.value * k;
  }
}

;// ../../node_modules/d3-hierarchy/src/partition.js



/* harmony default export */ function extension_src_partition() {
  var dx = 1,
      dy = 1,
      padding = 0,
      round = false;

  function partition(root) {
    var n = root.height + 1;
    root.x0 =
    root.y0 = padding;
    root.x1 = dx;
    root.y1 = dy / n;
    root.eachBefore(positionNode(dy, n));
    if (round) root.eachBefore(extension_treemap_round);
    return root;
  }

  function positionNode(dy, n) {
    return function(node) {
      if (node.children) {
        extension_dice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);
      }
      var x0 = node.x0,
          y0 = node.y0,
          x1 = node.x1 - padding,
          y1 = node.y1 - padding;
      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
      node.x0 = x0;
      node.y0 = y0;
      node.x1 = x1;
      node.y1 = y1;
    };
  }

  partition.round = function(x) {
    return arguments.length ? (round = !!x, partition) : round;
  };

  partition.size = function(x) {
    return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];
  };

  partition.padding = function(x) {
    return arguments.length ? (padding = +x, partition) : padding;
  };

  return partition;
}

;// ../../node_modules/d3-hierarchy/src/stratify.js



var extension_preroot = {depth: -1},
    extension_ambiguous = {},
    extension_imputed = {};

function extension_defaultId(d) {
  return d.id;
}

function extension_defaultParentId(d) {
  return d.parentId;
}

/* harmony default export */ function extension_stratify() {
  var id = extension_defaultId,
      parentId = extension_defaultParentId,
      path;

  function stratify(data) {
    var nodes = Array.from(data),
        currentId = id,
        currentParentId = parentId,
        n,
        d,
        i,
        root,
        parent,
        node,
        nodeId,
        nodeKey,
        nodeByKey = new Map;

    if (path != null) {
      const I = nodes.map((d, i) => extension_stratify_normalize(path(d, i, data)));
      const P = I.map(extension_parentof);
      const S = new Set(I).add("");
      for (const i of P) {
        if (!S.has(i)) {
          S.add(i);
          I.push(i);
          P.push(extension_parentof(i));
          nodes.push(extension_imputed);
        }
      }
      currentId = (_, i) => I[i];
      currentParentId = (_, i) => P[i];
    }

    for (i = 0, n = nodes.length; i < n; ++i) {
      d = nodes[i], node = nodes[i] = new extension_hierarchy_Node(d);
      if ((nodeId = currentId(d, i, data)) != null && (nodeId += "")) {
        nodeKey = node.id = nodeId;
        nodeByKey.set(nodeKey, nodeByKey.has(nodeKey) ? extension_ambiguous : node);
      }
      if ((nodeId = currentParentId(d, i, data)) != null && (nodeId += "")) {
        node.parent = nodeId;
      }
    }

    for (i = 0; i < n; ++i) {
      node = nodes[i];
      if (nodeId = node.parent) {
        parent = nodeByKey.get(nodeId);
        if (!parent) throw new Error("missing: " + nodeId);
        if (parent === extension_ambiguous) throw new Error("ambiguous: " + nodeId);
        if (parent.children) parent.children.push(node);
        else parent.children = [node];
        node.parent = parent;
      } else {
        if (root) throw new Error("multiple roots");
        root = node;
      }
    }

    if (!root) throw new Error("no root");

    // When imputing internal nodes, only introduce roots if needed.
    // Then replace the imputed marker data with null.
    if (path != null) {
      while (root.data === extension_imputed && root.children.length === 1) {
        root = root.children[0], --n;
      }
      for (let i = nodes.length - 1; i >= 0; --i) {
        node = nodes[i];
        if (node.data !== extension_imputed) break;
        node.data = null;
      }
    }

    root.parent = extension_preroot;
    root.eachBefore(function(node) { node.depth = node.parent.depth + 1; --n; }).eachBefore(extension_computeHeight);
    root.parent = null;
    if (n > 0) throw new Error("cycle");

    return root;
  }

  stratify.id = function(x) {
    return arguments.length ? (id = extension_optional(x), stratify) : id;
  };

  stratify.parentId = function(x) {
    return arguments.length ? (parentId = extension_optional(x), stratify) : parentId;
  };

  stratify.path = function(x) {
    return arguments.length ? (path = extension_optional(x), stratify) : path;
  };

  return stratify;
}

// To normalize a path, we coerce to a string, strip the trailing slash if any
// (as long as the trailing slash is not immediately preceded by another slash),
// and add leading slash if missing.
function extension_stratify_normalize(path) {
  path = `${path}`;
  let i = path.length;
  if (extension_slash(path, i - 1) && !extension_slash(path, i - 2)) path = path.slice(0, -1);
  return path[0] === "/" ? path : `/${path}`;
}

// Walk backwards to find the first slash that is not the leading slash, e.g.:
// "/foo/bar" ⇥ "/foo", "/foo" ⇥ "/", "/" ↦ "". (The root is special-cased
// because the id of the root must be a truthy value.)
function extension_parentof(path) {
  let i = path.length;
  if (i < 2) return "";
  while (--i > 1) if (extension_slash(path, i)) break;
  return path.slice(0, i);
}

// Slashes can be escaped; to determine whether a slash is a path delimiter, we
// count the number of preceding backslashes escaping the forward slash: an odd
// number indicates an escaped forward slash.
function extension_slash(path, i) {
  if (path[i] === "/") {
    let k = 0;
    while (i > 0 && path[--i] === "\\") ++k;
    if ((k & 1) === 0) return true;
  }
  return false;
}

;// ../../node_modules/d3-hierarchy/src/tree.js


function extension_defaultSeparation(a, b) {
  return a.parent === b.parent ? 1 : 2;
}

// function radialSeparation(a, b) {
//   return (a.parent === b.parent ? 1 : 2) / a.depth;
// }

// This function is used to traverse the left contour of a subtree (or
// subforest). It returns the successor of v on this contour. This successor is
// either given by the leftmost child of v or by the thread of v. The function
// returns null if and only if v is on the highest level of its subtree.
function extension_nextLeft(v) {
  var children = v.children;
  return children ? children[0] : v.t;
}

// This function works analogously to nextLeft.
function extension_nextRight(v) {
  var children = v.children;
  return children ? children[children.length - 1] : v.t;
}

// Shifts the current subtree rooted at w+. This is done by increasing
// prelim(w+) and mod(w+) by shift.
function extension_moveSubtree(wm, wp, shift) {
  var change = shift / (wp.i - wm.i);
  wp.c -= change;
  wp.s += shift;
  wm.c += change;
  wp.z += shift;
  wp.m += shift;
}

// All other shifts, applied to the smaller subtrees between w- and w+, are
// performed by this function. To prepare the shifts, we have to adjust
// change(w+), shift(w+), and change(w-).
function extension_executeShifts(v) {
  var shift = 0,
      change = 0,
      children = v.children,
      i = children.length,
      w;
  while (--i >= 0) {
    w = children[i];
    w.z += shift;
    w.m += shift;
    shift += w.s + (change += w.c);
  }
}

// If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise,
// returns the specified (default) ancestor.
function extension_nextAncestor(vim, v, ancestor) {
  return vim.a.parent === v.parent ? vim.a : ancestor;
}

function extension_TreeNode(node, i) {
  this._ = node;
  this.parent = null;
  this.children = null;
  this.A = null; // default ancestor
  this.a = this; // ancestor
  this.z = 0; // prelim
  this.m = 0; // mod
  this.c = 0; // change
  this.s = 0; // shift
  this.t = null; // thread
  this.i = i; // number
}

extension_TreeNode.prototype = Object.create(extension_hierarchy_Node.prototype);

function extension_treeRoot(root) {
  var tree = new extension_TreeNode(root, 0),
      node,
      nodes = [tree],
      child,
      children,
      i,
      n;

  while (node = nodes.pop()) {
    if (children = node._.children) {
      node.children = new Array(n = children.length);
      for (i = n - 1; i >= 0; --i) {
        nodes.push(child = node.children[i] = new extension_TreeNode(children[i], i));
        child.parent = node;
      }
    }
  }

  (tree.parent = new extension_TreeNode(null, 0)).children = [tree];
  return tree;
}

// Node-link tree diagram using the Reingold-Tilford "tidy" algorithm
/* harmony default export */ function extension_tree() {
  var separation = extension_defaultSeparation,
      dx = 1,
      dy = 1,
      nodeSize = null;

  function tree(root) {
    var t = extension_treeRoot(root);

    // Compute the layout using Buchheim et al.’s algorithm.
    t.eachAfter(firstWalk), t.parent.m = -t.z;
    t.eachBefore(secondWalk);

    // If a fixed node size is specified, scale x and y.
    if (nodeSize) root.eachBefore(sizeNode);

    // If a fixed tree size is specified, scale x and y based on the extent.
    // Compute the left-most, right-most, and depth-most nodes for extents.
    else {
      var left = root,
          right = root,
          bottom = root;
      root.eachBefore(function(node) {
        if (node.x < left.x) left = node;
        if (node.x > right.x) right = node;
        if (node.depth > bottom.depth) bottom = node;
      });
      var s = left === right ? 1 : separation(left, right) / 2,
          tx = s - left.x,
          kx = dx / (right.x + s + tx),
          ky = dy / (bottom.depth || 1);
      root.eachBefore(function(node) {
        node.x = (node.x + tx) * kx;
        node.y = node.depth * ky;
      });
    }

    return root;
  }

  // Computes a preliminary x-coordinate for v. Before that, FIRST WALK is
  // applied recursively to the children of v, as well as the function
  // APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the
  // node v is placed to the midpoint of its outermost children.
  function firstWalk(v) {
    var children = v.children,
        siblings = v.parent.children,
        w = v.i ? siblings[v.i - 1] : null;
    if (children) {
      extension_executeShifts(v);
      var midpoint = (children[0].z + children[children.length - 1].z) / 2;
      if (w) {
        v.z = w.z + separation(v._, w._);
        v.m = v.z - midpoint;
      } else {
        v.z = midpoint;
      }
    } else if (w) {
      v.z = w.z + separation(v._, w._);
    }
    v.parent.A = apportion(v, w, v.parent.A || siblings[0]);
  }

  // Computes all real x-coordinates by summing up the modifiers recursively.
  function secondWalk(v) {
    v._.x = v.z + v.parent.m;
    v.m += v.parent.m;
  }

  // The core of the algorithm. Here, a new subtree is combined with the
  // previous subtrees. Threads are used to traverse the inside and outside
  // contours of the left and right subtree up to the highest common level. The
  // vertices used for the traversals are vi+, vi-, vo-, and vo+, where the
  // superscript o means outside and i means inside, the subscript - means left
  // subtree and + means right subtree. For summing up the modifiers along the
  // contour, we use respective variables si+, si-, so-, and so+. Whenever two
  // nodes of the inside contours conflict, we compute the left one of the
  // greatest uncommon ancestors using the function ANCESTOR and call MOVE
  // SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.
  // Finally, we add a new thread (if necessary).
  function apportion(v, w, ancestor) {
    if (w) {
      var vip = v,
          vop = v,
          vim = w,
          vom = vip.parent.children[0],
          sip = vip.m,
          sop = vop.m,
          sim = vim.m,
          som = vom.m,
          shift;
      while (vim = extension_nextRight(vim), vip = extension_nextLeft(vip), vim && vip) {
        vom = extension_nextLeft(vom);
        vop = extension_nextRight(vop);
        vop.a = v;
        shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);
        if (shift > 0) {
          extension_moveSubtree(extension_nextAncestor(vim, v, ancestor), v, shift);
          sip += shift;
          sop += shift;
        }
        sim += vim.m;
        sip += vip.m;
        som += vom.m;
        sop += vop.m;
      }
      if (vim && !extension_nextRight(vop)) {
        vop.t = vim;
        vop.m += sim - sop;
      }
      if (vip && !extension_nextLeft(vom)) {
        vom.t = vip;
        vom.m += sip - som;
        ancestor = v;
      }
    }
    return ancestor;
  }

  function sizeNode(node) {
    node.x *= dx;
    node.y = node.depth * dy;
  }

  tree.separation = function(x) {
    return arguments.length ? (separation = x, tree) : separation;
  };

  tree.size = function(x) {
    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : (nodeSize ? null : [dx, dy]);
  };

  tree.nodeSize = function(x) {
    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : (nodeSize ? [dx, dy] : null);
  };

  return tree;
}

;// ../../node_modules/d3-hierarchy/src/cluster.js
function extension_cluster_defaultSeparation(a, b) {
  return a.parent === b.parent ? 1 : 2;
}

function extension_meanX(children) {
  return children.reduce(extension_meanXReduce, 0) / children.length;
}

function extension_meanXReduce(x, c) {
  return x + c.x;
}

function extension_maxY(children) {
  return 1 + children.reduce(extension_maxYReduce, 0);
}

function extension_maxYReduce(y, c) {
  return Math.max(y, c.y);
}

function extension_leafLeft(node) {
  var children;
  while (children = node.children) node = children[0];
  return node;
}

function extension_leafRight(node) {
  var children;
  while (children = node.children) node = children[children.length - 1];
  return node;
}

/* harmony default export */ function extension_cluster() {
  var separation = extension_cluster_defaultSeparation,
      dx = 1,
      dy = 1,
      nodeSize = false;

  function cluster(root) {
    var previousNode,
        x = 0;

    // First walk, computing the initial x & y values.
    root.eachAfter(function(node) {
      var children = node.children;
      if (children) {
        node.x = extension_meanX(children);
        node.y = extension_maxY(children);
      } else {
        node.x = previousNode ? x += separation(node, previousNode) : 0;
        node.y = 0;
        previousNode = node;
      }
    });

    var left = extension_leafLeft(root),
        right = extension_leafRight(root),
        x0 = left.x - separation(left, right) / 2,
        x1 = right.x + separation(right, left) / 2;

    // Second walk, normalizing x & y to the desired size.
    return root.eachAfter(nodeSize ? function(node) {
      node.x = (node.x - root.x) * dx;
      node.y = (root.y - node.y) * dy;
    } : function(node) {
      node.x = (node.x - x0) / (x1 - x0) * dx;
      node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;
    });
  }

  cluster.separation = function(x) {
    return arguments.length ? (separation = x, cluster) : separation;
  };

  cluster.size = function(x) {
    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? null : [dx, dy]);
  };

  cluster.nodeSize = function(x) {
    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? [dx, dy] : null);
  };

  return cluster;
}

;// ../../node_modules/d3-hierarchy/src/treemap/binary.js
/* harmony default export */ function extension_treemap_binary(parent, x0, y0, x1, y1) {
  var nodes = parent.children,
      i, n = nodes.length,
      sum, sums = new Array(n + 1);

  for (sums[0] = sum = i = 0; i < n; ++i) {
    sums[i + 1] = sum += nodes[i].value;
  }

  partition(0, n, parent.value, x0, y0, x1, y1);

  function partition(i, j, value, x0, y0, x1, y1) {
    if (i >= j - 1) {
      var node = nodes[i];
      node.x0 = x0, node.y0 = y0;
      node.x1 = x1, node.y1 = y1;
      return;
    }

    var valueOffset = sums[i],
        valueTarget = (value / 2) + valueOffset,
        k = i + 1,
        hi = j - 1;

    while (k < hi) {
      var mid = k + hi >>> 1;
      if (sums[mid] < valueTarget) k = mid + 1;
      else hi = mid;
    }

    if ((valueTarget - sums[k - 1]) < (sums[k] - valueTarget) && i + 1 < k) --k;

    var valueLeft = sums[k] - valueOffset,
        valueRight = value - valueLeft;

    if ((x1 - x0) > (y1 - y0)) {
      var xk = value ? (x0 * valueRight + x1 * valueLeft) / value : x1;
      partition(i, k, valueLeft, x0, y0, xk, y1);
      partition(k, j, valueRight, xk, y0, x1, y1);
    } else {
      var yk = value ? (y0 * valueRight + y1 * valueLeft) / value : y1;
      partition(i, k, valueLeft, x0, y0, x1, yk);
      partition(k, j, valueRight, x0, yk, x1, y1);
    }
  }
}

;// ../../node_modules/d3-hierarchy/src/treemap/slice.js
/* harmony default export */ function extension_treemap_slice(parent, x0, y0, x1, y1) {
  var nodes = parent.children,
      node,
      i = -1,
      n = nodes.length,
      k = parent.value && (y1 - y0) / parent.value;

  while (++i < n) {
    node = nodes[i], node.x0 = x0, node.x1 = x1;
    node.y0 = y0, node.y1 = y0 += node.value * k;
  }
}

;// ../../node_modules/d3-hierarchy/src/treemap/sliceDice.js



/* harmony default export */ function extension_sliceDice(parent, x0, y0, x1, y1) {
  (parent.depth & 1 ? extension_treemap_slice : extension_dice)(parent, x0, y0, x1, y1);
}

;// ../../node_modules/d3-hierarchy/src/treemap/squarify.js



var extension_phi = (1 + Math.sqrt(5)) / 2;

function extension_squarifyRatio(ratio, parent, x0, y0, x1, y1) {
  var rows = [],
      nodes = parent.children,
      row,
      nodeValue,
      i0 = 0,
      i1 = 0,
      n = nodes.length,
      dx, dy,
      value = parent.value,
      sumValue,
      minValue,
      maxValue,
      newRatio,
      minRatio,
      alpha,
      beta;

  while (i0 < n) {
    dx = x1 - x0, dy = y1 - y0;

    // Find the next non-empty node.
    do sumValue = nodes[i1++].value; while (!sumValue && i1 < n);
    minValue = maxValue = sumValue;
    alpha = Math.max(dy / dx, dx / dy) / (value * ratio);
    beta = sumValue * sumValue * alpha;
    minRatio = Math.max(maxValue / beta, beta / minValue);

    // Keep adding nodes while the aspect ratio maintains or improves.
    for (; i1 < n; ++i1) {
      sumValue += nodeValue = nodes[i1].value;
      if (nodeValue < minValue) minValue = nodeValue;
      if (nodeValue > maxValue) maxValue = nodeValue;
      beta = sumValue * sumValue * alpha;
      newRatio = Math.max(maxValue / beta, beta / minValue);
      if (newRatio > minRatio) { sumValue -= nodeValue; break; }
      minRatio = newRatio;
    }

    // Position and record the row orientation.
    rows.push(row = {value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1)});
    if (row.dice) extension_dice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);
    else extension_treemap_slice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);
    value -= sumValue, i0 = i1;
  }

  return rows;
}

/* harmony default export */ const extension_squarify = ((function custom(ratio) {

  function squarify(parent, x0, y0, x1, y1) {
    extension_squarifyRatio(ratio, parent, x0, y0, x1, y1);
  }

  squarify.ratio = function(x) {
    return custom((x = +x) > 1 ? x : 1);
  };

  return squarify;
})(extension_phi));

;// ../../node_modules/d3-hierarchy/src/treemap/resquarify.js




/* harmony default export */ const extension_resquarify = ((function custom(ratio) {

  function resquarify(parent, x0, y0, x1, y1) {
    if ((rows = parent._squarify) && (rows.ratio === ratio)) {
      var rows,
          row,
          nodes,
          i,
          j = -1,
          n,
          m = rows.length,
          value = parent.value;

      while (++j < m) {
        row = rows[j], nodes = row.children;
        for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;
        if (row.dice) extension_dice(row, x0, y0, x1, value ? y0 += (y1 - y0) * row.value / value : y1);
        else extension_treemap_slice(row, x0, y0, value ? x0 += (x1 - x0) * row.value / value : x1, y1);
        value -= row.value;
      }
    } else {
      parent._squarify = rows = extension_squarifyRatio(ratio, parent, x0, y0, x1, y1);
      rows.ratio = ratio;
    }
  }

  resquarify.ratio = function(x) {
    return custom((x = +x) > 1 ? x : 1);
  };

  return resquarify;
})(extension_phi));

;// ../../node_modules/d3-hierarchy/src/treemap/index.js





/* harmony default export */ function extension_treemap() {
  var tile = extension_squarify,
      round = false,
      dx = 1,
      dy = 1,
      paddingStack = [0],
      paddingInner = extension_constantZero,
      paddingTop = extension_constantZero,
      paddingRight = extension_constantZero,
      paddingBottom = extension_constantZero,
      paddingLeft = extension_constantZero;

  function treemap(root) {
    root.x0 =
    root.y0 = 0;
    root.x1 = dx;
    root.y1 = dy;
    root.eachBefore(positionNode);
    paddingStack = [0];
    if (round) root.eachBefore(extension_treemap_round);
    return root;
  }

  function positionNode(node) {
    var p = paddingStack[node.depth],
        x0 = node.x0 + p,
        y0 = node.y0 + p,
        x1 = node.x1 - p,
        y1 = node.y1 - p;
    if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
    if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
    node.x0 = x0;
    node.y0 = y0;
    node.x1 = x1;
    node.y1 = y1;
    if (node.children) {
      p = paddingStack[node.depth + 1] = paddingInner(node) / 2;
      x0 += paddingLeft(node) - p;
      y0 += paddingTop(node) - p;
      x1 -= paddingRight(node) - p;
      y1 -= paddingBottom(node) - p;
      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
      tile(node, x0, y0, x1, y1);
    }
  }

  treemap.round = function(x) {
    return arguments.length ? (round = !!x, treemap) : round;
  };

  treemap.size = function(x) {
    return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];
  };

  treemap.tile = function(x) {
    return arguments.length ? (tile = extension_required(x), treemap) : tile;
  };

  treemap.padding = function(x) {
    return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();
  };

  treemap.paddingInner = function(x) {
    return arguments.length ? (paddingInner = typeof x === "function" ? x : extension_d3_hierarchy_src_constant(+x), treemap) : paddingInner;
  };

  treemap.paddingOuter = function(x) {
    return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();
  };

  treemap.paddingTop = function(x) {
    return arguments.length ? (paddingTop = typeof x === "function" ? x : extension_d3_hierarchy_src_constant(+x), treemap) : paddingTop;
  };

  treemap.paddingRight = function(x) {
    return arguments.length ? (paddingRight = typeof x === "function" ? x : extension_d3_hierarchy_src_constant(+x), treemap) : paddingRight;
  };

  treemap.paddingBottom = function(x) {
    return arguments.length ? (paddingBottom = typeof x === "function" ? x : extension_d3_hierarchy_src_constant(+x), treemap) : paddingBottom;
  };

  treemap.paddingLeft = function(x) {
    return arguments.length ? (paddingLeft = typeof x === "function" ? x : extension_d3_hierarchy_src_constant(+x), treemap) : paddingLeft;
  };

  return treemap;
}

;// ../../node_modules/vega-hierarchy/build/vega-hierarchy.module.js




// Build lookup table mapping tuple keys to tree node instances
function extension_vega_hierarchy_module_lookup (tree, key, filter) {
  const map = {};
  tree.each(node => {
    const t = node.data;
    if (filter(t)) map[key(t)] = node;
  });
  tree.lookup = map;
  return tree;
}

/**
 * Nest tuples into a tree structure, grouped by key values.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<function(object): *>} params.keys - The key fields to nest by, in order.
 * @param {boolean} [params.generate=false] - A boolean flag indicating if
 *   non-leaf nodes generated by this transform should be included in the
 *   output. The default (false) includes only the input data (leaf nodes)
 *   in the data stream.
 */
function extension_Nest(params) {
  extension_Transform.call(this, null, params);
}
extension_Nest.Definition = {
  'type': 'Nest',
  'metadata': {
    'treesource': true,
    'changes': true
  },
  'params': [{
    'name': 'keys',
    'type': 'field',
    'array': true
  }, {
    'name': 'generate',
    'type': 'boolean'
  }]
};
const extension_vega_hierarchy_module_children = n => n.values;
extension_inherits(extension_Nest, extension_Transform, {
  transform(_, pulse) {
    if (!pulse.source) {
      extension_vega_util_module_error('Nest transform requires an upstream data source.');
    }
    var gen = _.generate,
      mod = _.modified(),
      out = pulse.clone(),
      tree = this.value;
    if (!tree || mod || pulse.changed()) {
      // collect nodes to remove
      if (tree) {
        tree.each(node => {
          if (node.children && extension_isTuple(node.data)) {
            out.rem.push(node.data);
          }
        });
      }

      // generate new tree structure
      this.value = tree = extension_hierarchy({
        values: extension_vega_util_module_array(_.keys).reduce((n, k) => {
          n.key(k);
          return n;
        }, extension_vega_hierarchy_module_nest()).entries(out.source)
      }, extension_vega_hierarchy_module_children);

      // collect nodes to add
      if (gen) {
        tree.each(node => {
          if (node.children) {
            node = extension_ingest$1(node.data);
            out.add.push(node);
            out.source.push(node);
          }
        });
      }

      // build lookup table
      extension_vega_hierarchy_module_lookup(tree, extension_tupleid, extension_tupleid);
    }
    out.source.root = tree;
    return out;
  }
});
function extension_vega_hierarchy_module_nest() {
  const keys = [],
    nest = {
      entries: array => entries(apply(array, 0), 0),
      key: d => (keys.push(d), nest)
    };
  function apply(array, depth) {
    if (depth >= keys.length) {
      return array;
    }
    const n = array.length,
      key = keys[depth++],
      valuesByKey = {},
      result = {};
    let i = -1,
      keyValue,
      value,
      values;
    while (++i < n) {
      keyValue = key(value = array[i]) + '';
      if (values = valuesByKey[keyValue]) {
        values.push(value);
      } else {
        valuesByKey[keyValue] = [value];
      }
    }
    for (keyValue in valuesByKey) {
      result[keyValue] = apply(valuesByKey[keyValue], depth);
    }
    return result;
  }
  function entries(map, depth) {
    if (++depth > keys.length) return map;
    const array = [];
    for (const key in map) {
      array.push({
        key,
        values: entries(map[key], depth)
      });
    }
    return array;
  }
  return nest;
}

/**
 * Abstract class for tree layout.
 * @constructor
 * @param {object} params - The parameters for this operator.
 */
function extension_HierarchyLayout(params) {
  extension_Transform.call(this, null, params);
}
const extension_vega_hierarchy_module_defaultSeparation = (a, b) => a.parent === b.parent ? 1 : 2;
extension_inherits(extension_HierarchyLayout, extension_Transform, {
  transform(_, pulse) {
    if (!pulse.source || !pulse.source.root) {
      extension_vega_util_module_error(this.constructor.name + ' transform requires a backing tree data source.');
    }
    const layout = this.layout(_.method),
      fields = this.fields,
      root = pulse.source.root,
      as = _.as || fields;
    if (_.field) root.sum(_.field);else root.count();
    if (_.sort) root.sort(extension_stableCompare(_.sort, d => d.data));
    extension_setParams(layout, this.params, _);
    if (layout.separation) {
      layout.separation(_.separation !== false ? extension_vega_hierarchy_module_defaultSeparation : extension_one);
    }
    try {
      this.value = layout(root);
    } catch (err) {
      extension_vega_util_module_error(err);
    }
    root.each(node => extension_setFields(node, fields, as));
    return pulse.reflow(_.modified()).modifies(as).modifies('leaf');
  }
});
function extension_setParams(layout, params, _) {
  for (let p, i = 0, n = params.length; i < n; ++i) {
    p = params[i];
    if (p in _) layout[p](_[p]);
  }
}
function extension_setFields(node, fields, as) {
  const t = node.data,
    n = fields.length - 1;
  for (let i = 0; i < n; ++i) {
    t[as[i]] = node[fields[i]];
  }
  t[as[n]] = node.children ? node.children.length : 0;
}

const extension_Output$3 = ['x', 'y', 'r', 'depth', 'children'];

/**
 * Packed circle tree layout.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The value field to size nodes.
 */
function extension_Pack(params) {
  extension_HierarchyLayout.call(this, params);
}
extension_Pack.Definition = {
  'type': 'Pack',
  'metadata': {
    'tree': true,
    'modifies': true
  },
  'params': [{
    'name': 'field',
    'type': 'field'
  }, {
    'name': 'sort',
    'type': 'compare'
  }, {
    'name': 'padding',
    'type': 'number',
    'default': 0
  }, {
    'name': 'radius',
    'type': 'field',
    'default': null
  }, {
    'name': 'size',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': extension_Output$3.length,
    'default': extension_Output$3
  }]
};
extension_inherits(extension_Pack, extension_HierarchyLayout, {
  layout: extension_pack,
  params: ['radius', 'size', 'padding'],
  fields: extension_Output$3
});

const extension_Output$2 = ['x0', 'y0', 'x1', 'y1', 'depth', 'children'];

/**
 * Partition tree layout.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The value field to size nodes.
 */
function extension_Partition(params) {
  extension_HierarchyLayout.call(this, params);
}
extension_Partition.Definition = {
  'type': 'Partition',
  'metadata': {
    'tree': true,
    'modifies': true
  },
  'params': [{
    'name': 'field',
    'type': 'field'
  }, {
    'name': 'sort',
    'type': 'compare'
  }, {
    'name': 'padding',
    'type': 'number',
    'default': 0
  }, {
    'name': 'round',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'size',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': extension_Output$2.length,
    'default': extension_Output$2
  }]
};
extension_inherits(extension_Partition, extension_HierarchyLayout, {
  layout: extension_src_partition,
  params: ['size', 'round', 'padding'],
  fields: extension_Output$2
});

/**
 * Stratify a collection of tuples into a tree structure based on
 * id and parent id fields.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.key - Unique key field for each tuple.
 * @param {function(object): *} params.parentKey - Field with key for parent tuple.
 */
function extension_Stratify(params) {
  extension_Transform.call(this, null, params);
}
extension_Stratify.Definition = {
  'type': 'Stratify',
  'metadata': {
    'treesource': true
  },
  'params': [{
    'name': 'key',
    'type': 'field',
    'required': true
  }, {
    'name': 'parentKey',
    'type': 'field',
    'required': true
  }]
};
extension_inherits(extension_Stratify, extension_Transform, {
  transform(_, pulse) {
    if (!pulse.source) {
      extension_vega_util_module_error('Stratify transform requires an upstream data source.');
    }
    let tree = this.value;
    const mod = _.modified(),
      out = pulse.fork(pulse.ALL).materialize(pulse.SOURCE),
      run = !tree || mod || pulse.changed(pulse.ADD_REM) || pulse.modified(_.key.fields) || pulse.modified(_.parentKey.fields);

    // prevent upstream source pollution
    out.source = out.source.slice();
    if (run) {
      tree = out.source.length ? extension_vega_hierarchy_module_lookup(extension_stratify().id(_.key).parentId(_.parentKey)(out.source), _.key, extension_truthy) : extension_vega_hierarchy_module_lookup(extension_stratify()([{}]), _.key, _.key);
    }
    out.source.root = this.value = tree;
    return out;
  }
});

const extension_Layouts = {
  tidy: extension_tree,
  cluster: extension_cluster
};
const extension_Output$1 = ['x', 'y', 'depth', 'children'];

/**
 * Tree layout. Depending on the method parameter, performs either
 * Reingold-Tilford 'tidy' layout or dendrogram 'cluster' layout.
 * @constructor
 * @param {object} params - The parameters for this operator.
 */
function extension_Tree(params) {
  extension_HierarchyLayout.call(this, params);
}
extension_Tree.Definition = {
  'type': 'Tree',
  'metadata': {
    'tree': true,
    'modifies': true
  },
  'params': [{
    'name': 'field',
    'type': 'field'
  }, {
    'name': 'sort',
    'type': 'compare'
  }, {
    'name': 'method',
    'type': 'enum',
    'default': 'tidy',
    'values': ['tidy', 'cluster']
  }, {
    'name': 'size',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'nodeSize',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'separation',
    'type': 'boolean',
    'default': true
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': extension_Output$1.length,
    'default': extension_Output$1
  }]
};
extension_inherits(extension_Tree, extension_HierarchyLayout, {
  /**
   * Tree layout generator. Supports both 'tidy' and 'cluster' layouts.
   */
  layout(method) {
    const m = method || 'tidy';
    if (extension_vega_util_module_has(extension_Layouts, m)) return extension_Layouts[m]();else extension_vega_util_module_error('Unrecognized Tree layout method: ' + m);
  },
  params: ['size', 'nodeSize'],
  fields: extension_Output$1
});

/**
 * Generate tuples representing links between tree nodes.
 * The resulting tuples will contain 'source' and 'target' fields,
 * which point to parent and child node tuples, respectively.
 * @constructor
 * @param {object} params - The parameters for this operator.
 */
function extension_TreeLinks(params) {
  extension_Transform.call(this, [], params);
}
extension_TreeLinks.Definition = {
  'type': 'TreeLinks',
  'metadata': {
    'tree': true,
    'generates': true,
    'changes': true
  },
  'params': []
};
extension_inherits(extension_TreeLinks, extension_Transform, {
  transform(_, pulse) {
    const links = this.value,
      tree = pulse.source && pulse.source.root,
      out = pulse.fork(pulse.NO_SOURCE),
      lut = {};
    if (!tree) extension_vega_util_module_error('TreeLinks transform requires a tree data source.');
    if (pulse.changed(pulse.ADD_REM)) {
      // remove previous links
      out.rem = links;

      // build lookup table of valid tuples
      pulse.visit(pulse.SOURCE, t => lut[extension_tupleid(t)] = 1);

      // generate links for all edges incident on valid tuples
      tree.each(node => {
        const t = node.data,
          p = node.parent && node.parent.data;
        if (p && lut[extension_tupleid(t)] && lut[extension_tupleid(p)]) {
          out.add.push(extension_ingest$1({
            source: p,
            target: t
          }));
        }
      });
      this.value = out.add;
    } else if (pulse.changed(pulse.MOD)) {
      // build lookup table of modified tuples
      pulse.visit(pulse.MOD, t => lut[extension_tupleid(t)] = 1);

      // gather links incident on modified tuples
      links.forEach(link => {
        if (lut[extension_tupleid(link.source)] || lut[extension_tupleid(link.target)]) {
          out.mod.push(link);
        }
      });
    }
    return out;
  }
});

const extension_Tiles = {
  binary: extension_treemap_binary,
  dice: extension_dice,
  slice: extension_treemap_slice,
  slicedice: extension_sliceDice,
  squarify: extension_squarify,
  resquarify: extension_resquarify
};
const extension_vega_hierarchy_module_Output = ['x0', 'y0', 'x1', 'y1', 'depth', 'children'];

/**
 * Treemap layout.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.field - The value field to size nodes.
 */
function extension_Treemap(params) {
  extension_HierarchyLayout.call(this, params);
}
extension_Treemap.Definition = {
  'type': 'Treemap',
  'metadata': {
    'tree': true,
    'modifies': true
  },
  'params': [{
    'name': 'field',
    'type': 'field'
  }, {
    'name': 'sort',
    'type': 'compare'
  }, {
    'name': 'method',
    'type': 'enum',
    'default': 'squarify',
    'values': ['squarify', 'resquarify', 'binary', 'dice', 'slice', 'slicedice']
  }, {
    'name': 'padding',
    'type': 'number',
    'default': 0
  }, {
    'name': 'paddingInner',
    'type': 'number',
    'default': 0
  }, {
    'name': 'paddingOuter',
    'type': 'number',
    'default': 0
  }, {
    'name': 'paddingTop',
    'type': 'number',
    'default': 0
  }, {
    'name': 'paddingRight',
    'type': 'number',
    'default': 0
  }, {
    'name': 'paddingBottom',
    'type': 'number',
    'default': 0
  }, {
    'name': 'paddingLeft',
    'type': 'number',
    'default': 0
  }, {
    'name': 'ratio',
    'type': 'number',
    'default': 1.618033988749895
  }, {
    'name': 'round',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'size',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': extension_vega_hierarchy_module_Output.length,
    'default': extension_vega_hierarchy_module_Output
  }]
};
extension_inherits(extension_Treemap, extension_HierarchyLayout, {
  /**
   * Treemap layout generator. Adds 'method' and 'ratio' parameters
   * to configure the underlying tile method.
   */
  layout() {
    const x = extension_treemap();
    x.ratio = _ => {
      const t = x.tile();
      if (t.ratio) x.tile(t.ratio(_));
    };
    x.method = _ => {
      if (extension_vega_util_module_has(extension_Tiles, _)) x.tile(extension_Tiles[_]);else extension_vega_util_module_error('Unrecognized Treemap layout method: ' + _);
    };
    return x;
  },
  params: ['method', 'ratio', 'size', 'round', 'padding', 'paddingInner', 'paddingOuter', 'paddingTop', 'paddingRight', 'paddingBottom', 'paddingLeft'],
  fields: extension_vega_hierarchy_module_Output
});



;// ../../node_modules/vega-label/build/vega-label.module.js





// bit mask for getting first 2 bytes of alpha value
const extension_ALPHA_MASK = 0xff000000;
function extension_baseBitmaps($, data) {
  const bitmap = $.bitmap();
  // when there is no base mark but data points are to be avoided
  (data || []).forEach(d => bitmap.set($(d.boundary[0]), $(d.boundary[3])));
  return [bitmap, undefined];
}
function extension_markBitmaps($, baseMark, avoidMarks, labelInside, isGroupArea) {
  // create canvas
  const width = $.width,
    height = $.height,
    border = labelInside || isGroupArea,
    context = extension_domCanvas(width, height).getContext('2d'),
    baseMarkContext = extension_domCanvas(width, height).getContext('2d'),
    strokeContext = border && extension_domCanvas(width, height).getContext('2d');

  // render all marks to be avoided into canvas
  avoidMarks.forEach(items => extension_vega_label_module_draw(context, items, false));
  extension_vega_label_module_draw(baseMarkContext, baseMark, false);
  if (border) {
    extension_vega_label_module_draw(strokeContext, baseMark, true);
  }

  // get canvas buffer, create bitmaps
  const buffer = extension_getBuffer(context, width, height),
    baseMarkBuffer = extension_getBuffer(baseMarkContext, width, height),
    strokeBuffer = border && extension_getBuffer(strokeContext, width, height),
    layer1 = $.bitmap(),
    layer2 = border && $.bitmap();

  // populate bitmap layers
  let x, y, u, v, index, alpha, strokeAlpha, baseMarkAlpha;
  for (y = 0; y < height; ++y) {
    for (x = 0; x < width; ++x) {
      index = y * width + x;
      alpha = buffer[index] & extension_ALPHA_MASK;
      baseMarkAlpha = baseMarkBuffer[index] & extension_ALPHA_MASK;
      strokeAlpha = border && strokeBuffer[index] & extension_ALPHA_MASK;
      if (alpha || strokeAlpha || baseMarkAlpha) {
        u = $(x);
        v = $(y);
        if (!isGroupArea && (alpha || baseMarkAlpha)) layer1.set(u, v); // update interior bitmap
        if (border && (alpha || strokeAlpha)) layer2.set(u, v); // update border bitmap
      }
    }
  }
  return [layer1, layer2];
}
function extension_getBuffer(context, width, height) {
  return new Uint32Array(context.getImageData(0, 0, width, height).data.buffer);
}
function extension_vega_label_module_draw(context, items, interior) {
  if (!items.length) return;
  const type = items[0].mark.marktype;
  if (type === 'group') {
    items.forEach(group => {
      group.items.forEach(mark => extension_vega_label_module_draw(context, mark.items, interior));
    });
  } else {
    extension_Marks[type].draw(context, {
      items: interior ? items.map(extension_prepare) : items
    });
  }
}

/**
 * Prepare item before drawing into canvas (setting stroke and opacity)
 * @param {object} source item to be prepared
 * @returns prepared item
 */
function extension_prepare(source) {
  const item = extension_rederive(source, {});
  if (item.stroke && item.strokeOpacity !== 0 || item.fill && item.fillOpacity !== 0) {
    return {
      ...item,
      strokeOpacity: 1,
      stroke: '#000',
      fillOpacity: 0
    };
  }
  return item;
}

const extension_DIV = 5,
  // bit shift from x, y index to bit vector array index
  extension_vega_label_module_MOD = 31,
  // bit mask for index lookup within a bit vector
  extension_SIZE = 32,
  // individual bit vector size
  extension_RIGHT0 = new Uint32Array(extension_SIZE + 1),
  // left-anchored bit vectors, full -> 0
  extension_RIGHT1 = new Uint32Array(extension_SIZE + 1); // right-anchored bit vectors, 0 -> full

extension_RIGHT1[0] = 0;
extension_RIGHT0[0] = ~extension_RIGHT1[0];
for (let i = 1; i <= extension_SIZE; ++i) {
  extension_RIGHT1[i] = extension_RIGHT1[i - 1] << 1 | 1;
  extension_RIGHT0[i] = ~extension_RIGHT1[i];
}
function extension_Bitmap (w, h) {
  const array = new Uint32Array(~~((w * h + extension_SIZE) / extension_SIZE));
  function _set(index, mask) {
    array[index] |= mask;
  }
  function _clear(index, mask) {
    array[index] &= mask;
  }
  return {
    array: array,
    get: (x, y) => {
      const index = y * w + x;
      return array[index >>> extension_DIV] & 1 << (index & extension_vega_label_module_MOD);
    },
    set: (x, y) => {
      const index = y * w + x;
      _set(index >>> extension_DIV, 1 << (index & extension_vega_label_module_MOD));
    },
    clear: (x, y) => {
      const index = y * w + x;
      _clear(index >>> extension_DIV, ~(1 << (index & extension_vega_label_module_MOD)));
    },
    getRange: (x, y, x2, y2) => {
      let r = y2,
        start,
        end,
        indexStart,
        indexEnd;
      for (; r >= y; --r) {
        start = r * w + x;
        end = r * w + x2;
        indexStart = start >>> extension_DIV;
        indexEnd = end >>> extension_DIV;
        if (indexStart === indexEnd) {
          if (array[indexStart] & extension_RIGHT0[start & extension_vega_label_module_MOD] & extension_RIGHT1[(end & extension_vega_label_module_MOD) + 1]) {
            return true;
          }
        } else {
          if (array[indexStart] & extension_RIGHT0[start & extension_vega_label_module_MOD]) return true;
          if (array[indexEnd] & extension_RIGHT1[(end & extension_vega_label_module_MOD) + 1]) return true;
          for (let i = indexStart + 1; i < indexEnd; ++i) {
            if (array[i]) return true;
          }
        }
      }
      return false;
    },
    setRange: (x, y, x2, y2) => {
      let start, end, indexStart, indexEnd, i;
      for (; y <= y2; ++y) {
        start = y * w + x;
        end = y * w + x2;
        indexStart = start >>> extension_DIV;
        indexEnd = end >>> extension_DIV;
        if (indexStart === indexEnd) {
          _set(indexStart, extension_RIGHT0[start & extension_vega_label_module_MOD] & extension_RIGHT1[(end & extension_vega_label_module_MOD) + 1]);
        } else {
          _set(indexStart, extension_RIGHT0[start & extension_vega_label_module_MOD]);
          _set(indexEnd, extension_RIGHT1[(end & extension_vega_label_module_MOD) + 1]);
          for (i = indexStart + 1; i < indexEnd; ++i) _set(i, 0xffffffff);
        }
      }
    },
    clearRange: (x, y, x2, y2) => {
      let start, end, indexStart, indexEnd, i;
      for (; y <= y2; ++y) {
        start = y * w + x;
        end = y * w + x2;
        indexStart = start >>> extension_DIV;
        indexEnd = end >>> extension_DIV;
        if (indexStart === indexEnd) {
          _clear(indexStart, extension_RIGHT1[start & extension_vega_label_module_MOD] | extension_RIGHT0[(end & extension_vega_label_module_MOD) + 1]);
        } else {
          _clear(indexStart, extension_RIGHT1[start & extension_vega_label_module_MOD]);
          _clear(indexEnd, extension_RIGHT0[(end & extension_vega_label_module_MOD) + 1]);
          for (i = indexStart + 1; i < indexEnd; ++i) _clear(i, 0);
        }
      }
    },
    outOfBounds: (x, y, x2, y2) => x < 0 || y < 0 || y2 >= h || x2 >= w
  };
}

function extension_scaler (width, height, padding) {
  const ratio = Math.max(1, Math.sqrt(width * height / 1e6)),
    w = ~~((width + 2 * padding + ratio) / ratio),
    h = ~~((height + 2 * padding + ratio) / ratio),
    scale = _ => ~~((_ + padding) / ratio);
  scale.invert = _ => _ * ratio - padding;
  scale.bitmap = () => extension_Bitmap(w, h);
  scale.ratio = ratio;
  scale.padding = padding;
  scale.width = width;
  scale.height = height;
  return scale;
}

function extension_placeAreaLabelNaive ($, bitmaps, avoidBaseMark, markIndex) {
  const width = $.width,
    height = $.height;

  // try to place a label within an input area mark
  return function (d) {
    const items = d.datum.datum.items[markIndex].items,
      // area points
      n = items.length,
      // number of points
      textHeight = d.datum.fontSize,
      // label width
      textWidth = extension_textMetrics.width(d.datum, d.datum.text); // label height

    let maxAreaWidth = 0,
      x1,
      x2,
      y1,
      y2,
      x,
      y,
      areaWidth;

    // for each area sample point
    for (let i = 0; i < n; ++i) {
      x1 = items[i].x;
      y1 = items[i].y;
      x2 = items[i].x2 === undefined ? x1 : items[i].x2;
      y2 = items[i].y2 === undefined ? y1 : items[i].y2;
      x = (x1 + x2) / 2;
      y = (y1 + y2) / 2;
      areaWidth = Math.abs(x2 - x1 + y2 - y1);
      if (areaWidth >= maxAreaWidth) {
        maxAreaWidth = areaWidth;
        d.x = x;
        d.y = y;
      }
    }
    x = textWidth / 2;
    y = textHeight / 2;
    x1 = d.x - x;
    x2 = d.x + x;
    y1 = d.y - y;
    y2 = d.y + y;
    d.align = 'center';
    if (x1 < 0 && x2 <= width) {
      d.align = 'left';
    } else if (0 <= x1 && width < x2) {
      d.align = 'right';
    }
    d.baseline = 'middle';
    if (y1 < 0 && y2 <= height) {
      d.baseline = 'top';
    } else if (0 <= y1 && height < y2) {
      d.baseline = 'bottom';
    }
    return true;
  };
}

function extension_outOfBounds(x, y, textWidth, textHeight, width, height) {
  let r = textWidth / 2;
  return x - r < 0 || x + r > width || y - (r = textHeight / 2) < 0 || y + r > height;
}
function extension_collision($, x, y, textHeight, textWidth, h, bm0, bm1) {
  const w = textWidth * h / (textHeight * 2),
    x1 = $(x - w),
    x2 = $(x + w),
    y1 = $(y - (h = h / 2)),
    y2 = $(y + h);
  return bm0.outOfBounds(x1, y1, x2, y2) || bm0.getRange(x1, y1, x2, y2) || bm1 && bm1.getRange(x1, y1, x2, y2);
}

function extension_placeAreaLabelReducedSearch ($, bitmaps, avoidBaseMark, markIndex) {
  const width = $.width,
    height = $.height,
    bm0 = bitmaps[0],
    // where labels have been placed
    bm1 = bitmaps[1]; // area outlines

  function tryLabel(_x, _y, maxSize, textWidth, textHeight) {
    const x = $.invert(_x),
      y = $.invert(_y);
    let lo = maxSize,
      hi = height,
      mid;
    if (!extension_outOfBounds(x, y, textWidth, textHeight, width, height) && !extension_collision($, x, y, textHeight, textWidth, lo, bm0, bm1) && !extension_collision($, x, y, textHeight, textWidth, textHeight, bm0, null)) {
      // if the label fits at the current sample point,
      // perform binary search to find the largest font size that fits
      while (hi - lo >= 1) {
        mid = (lo + hi) / 2;
        if (extension_collision($, x, y, textHeight, textWidth, mid, bm0, bm1)) {
          hi = mid;
        } else {
          lo = mid;
        }
      }
      // place label if current lower bound exceeds prior max font size
      if (lo > maxSize) {
        return [x, y, lo, true];
      }
    }
  }

  // try to place a label within an input area mark
  return function (d) {
    const items = d.datum.datum.items[markIndex].items,
      // area points
      n = items.length,
      // number of points
      textHeight = d.datum.fontSize,
      // label width
      textWidth = extension_textMetrics.width(d.datum, d.datum.text); // label height

    let maxSize = avoidBaseMark ? textHeight : 0,
      labelPlaced = false,
      labelPlaced2 = false,
      maxAreaWidth = 0,
      x1,
      x2,
      y1,
      y2,
      x,
      y,
      _x,
      _y,
      _x1,
      _xMid,
      _x2,
      _y1,
      _yMid,
      _y2,
      areaWidth,
      result,
      swapTmp;

    // for each area sample point
    for (let i = 0; i < n; ++i) {
      x1 = items[i].x;
      y1 = items[i].y;
      x2 = items[i].x2 === undefined ? x1 : items[i].x2;
      y2 = items[i].y2 === undefined ? y1 : items[i].y2;
      if (x1 > x2) {
        swapTmp = x1;
        x1 = x2;
        x2 = swapTmp;
      }
      if (y1 > y2) {
        swapTmp = y1;
        y1 = y2;
        y2 = swapTmp;
      }
      _x1 = $(x1);
      _x2 = $(x2);
      _xMid = ~~((_x1 + _x2) / 2);
      _y1 = $(y1);
      _y2 = $(y2);
      _yMid = ~~((_y1 + _y2) / 2);

      // search along the line from mid point between the 2 border to lower border
      for (_x = _xMid; _x >= _x1; --_x) {
        for (_y = _yMid; _y >= _y1; --_y) {
          result = tryLabel(_x, _y, maxSize, textWidth, textHeight);
          if (result) {
            [d.x, d.y, maxSize, labelPlaced] = result;
          }
        }
      }

      // search along the line from mid point between the 2 border to upper border
      for (_x = _xMid; _x <= _x2; ++_x) {
        for (_y = _yMid; _y <= _y2; ++_y) {
          result = tryLabel(_x, _y, maxSize, textWidth, textHeight);
          if (result) {
            [d.x, d.y, maxSize, labelPlaced] = result;
          }
        }
      }

      // place label at slice center if not placed through other means
      // and if we're not avoiding overlap with other areas
      if (!labelPlaced && !avoidBaseMark) {
        // one span is zero, hence we can add
        areaWidth = Math.abs(x2 - x1 + y2 - y1);
        x = (x1 + x2) / 2;
        y = (y1 + y2) / 2;

        // place label if it fits and improves the max area width
        if (areaWidth >= maxAreaWidth && !extension_outOfBounds(x, y, textWidth, textHeight, width, height) && !extension_collision($, x, y, textHeight, textWidth, textHeight, bm0, null)) {
          maxAreaWidth = areaWidth;
          d.x = x;
          d.y = y;
          labelPlaced2 = true;
        }
      }
    }

    // record current label placement information, update label bitmap
    if (labelPlaced || labelPlaced2) {
      x = textWidth / 2;
      y = textHeight / 2;
      bm0.setRange($(d.x - x), $(d.y - y), $(d.x + x), $(d.y + y));
      d.align = 'center';
      d.baseline = 'middle';
      return true;
    } else {
      return false;
    }
  };
}

// pixel direction offsets for flood fill search
const extension_X_DIR = [-1, -1, 1, 1];
const extension_Y_DIR = [-1, 1, -1, 1];
function extension_placeAreaLabelFloodFill ($, bitmaps, avoidBaseMark, markIndex) {
  const width = $.width,
    height = $.height,
    bm0 = bitmaps[0],
    // where labels have been placed
    bm1 = bitmaps[1],
    // area outlines
    bm2 = $.bitmap(); // flood-fill visitations

  // try to place a label within an input area mark
  return function (d) {
    const items = d.datum.datum.items[markIndex].items,
      // area points
      n = items.length,
      // number of points
      textHeight = d.datum.fontSize,
      // label width
      textWidth = extension_textMetrics.width(d.datum, d.datum.text),
      // label height
      stack = []; // flood fill stack

    let maxSize = avoidBaseMark ? textHeight : 0,
      labelPlaced = false,
      labelPlaced2 = false,
      maxAreaWidth = 0,
      x1,
      x2,
      y1,
      y2,
      x,
      y,
      _x,
      _y,
      lo,
      hi,
      mid,
      areaWidth;

    // for each area sample point
    for (let i = 0; i < n; ++i) {
      x1 = items[i].x;
      y1 = items[i].y;
      x2 = items[i].x2 === undefined ? x1 : items[i].x2;
      y2 = items[i].y2 === undefined ? y1 : items[i].y2;

      // add scaled center point to stack
      stack.push([$((x1 + x2) / 2), $((y1 + y2) / 2)]);

      // perform flood fill, visit points
      while (stack.length) {
        [_x, _y] = stack.pop();

        // exit if point already marked
        if (bm0.get(_x, _y) || bm1.get(_x, _y) || bm2.get(_x, _y)) continue;

        // mark point in flood fill bitmap
        // add search points for all (in bound) directions
        bm2.set(_x, _y);
        for (let j = 0; j < 4; ++j) {
          x = _x + extension_X_DIR[j];
          y = _y + extension_Y_DIR[j];
          if (!bm2.outOfBounds(x, y, x, y)) stack.push([x, y]);
        }

        // unscale point back to x, y space
        x = $.invert(_x);
        y = $.invert(_y);
        lo = maxSize;
        hi = height; // TODO: make this bound smaller

        if (!extension_outOfBounds(x, y, textWidth, textHeight, width, height) && !extension_collision($, x, y, textHeight, textWidth, lo, bm0, bm1) && !extension_collision($, x, y, textHeight, textWidth, textHeight, bm0, null)) {
          // if the label fits at the current sample point,
          // perform binary search to find the largest font size that fits
          while (hi - lo >= 1) {
            mid = (lo + hi) / 2;
            if (extension_collision($, x, y, textHeight, textWidth, mid, bm0, bm1)) {
              hi = mid;
            } else {
              lo = mid;
            }
          }
          // place label if current lower bound exceeds prior max font size
          if (lo > maxSize) {
            d.x = x;
            d.y = y;
            maxSize = lo;
            labelPlaced = true;
          }
        }
      }

      // place label at slice center if not placed through other means
      // and if we're not avoiding overlap with other areas
      if (!labelPlaced && !avoidBaseMark) {
        // one span is zero, hence we can add
        areaWidth = Math.abs(x2 - x1 + y2 - y1);
        x = (x1 + x2) / 2;
        y = (y1 + y2) / 2;

        // place label if it fits and improves the max area width
        if (areaWidth >= maxAreaWidth && !extension_outOfBounds(x, y, textWidth, textHeight, width, height) && !extension_collision($, x, y, textHeight, textWidth, textHeight, bm0, null)) {
          maxAreaWidth = areaWidth;
          d.x = x;
          d.y = y;
          labelPlaced2 = true;
        }
      }
    }

    // record current label placement information, update label bitmap
    if (labelPlaced || labelPlaced2) {
      x = textWidth / 2;
      y = textHeight / 2;
      bm0.setRange($(d.x - x), $(d.y - y), $(d.x + x), $(d.y + y));
      d.align = 'center';
      d.baseline = 'middle';
      return true;
    } else {
      return false;
    }
  };
}

const extension_Aligns = ['right', 'center', 'left'],
  extension_Baselines = ['bottom', 'middle', 'top'];
function extension_placeMarkLabel ($, bitmaps, anchors, offsets) {
  const width = $.width,
    height = $.height,
    bm0 = bitmaps[0],
    bm1 = bitmaps[1],
    n = offsets.length;
  return function (d) {
    const boundary = d.boundary,
      textHeight = d.datum.fontSize;

    // can not be placed if the mark is not visible in the graph bound
    if (boundary[2] < 0 || boundary[5] < 0 || boundary[0] > width || boundary[3] > height) {
      return false;
    }
    let textWidth = d.textWidth ?? 0,
      dx,
      dy,
      isInside,
      sizeFactor,
      insideFactor,
      x1,
      x2,
      y1,
      y2,
      xc,
      yc,
      _x1,
      _x2,
      _y1,
      _y2;

    // for each anchor and offset
    for (let i = 0; i < n; ++i) {
      dx = (anchors[i] & 0x3) - 1;
      dy = (anchors[i] >>> 0x2 & 0x3) - 1;
      isInside = dx === 0 && dy === 0 || offsets[i] < 0;
      sizeFactor = dx && dy ? Math.SQRT1_2 : 1;
      insideFactor = offsets[i] < 0 ? -1 : 1;
      x1 = boundary[1 + dx] + offsets[i] * dx * sizeFactor;
      yc = boundary[4 + dy] + insideFactor * textHeight * dy / 2 + offsets[i] * dy * sizeFactor;
      y1 = yc - textHeight / 2;
      y2 = yc + textHeight / 2;
      _x1 = $(x1);
      _y1 = $(y1);
      _y2 = $(y2);
      if (!textWidth) {
        // to avoid finding width of text label,
        if (!extension_test(_x1, _x1, _y1, _y2, bm0, bm1, x1, x1, y1, y2, boundary, isInside)) {
          // skip this anchor/offset option if we fail to place a label with 1px width
          continue;
        } else {
          // Otherwise, find the label width
          textWidth = extension_textMetrics.width(d.datum, d.datum.text);
        }
      }
      xc = x1 + insideFactor * textWidth * dx / 2;
      x1 = xc - textWidth / 2;
      x2 = xc + textWidth / 2;
      _x1 = $(x1);
      _x2 = $(x2);
      if (extension_test(_x1, _x2, _y1, _y2, bm0, bm1, x1, x2, y1, y2, boundary, isInside)) {
        // place label if the position is placeable
        d.x = !dx ? xc : dx * insideFactor < 0 ? x2 : x1;
        d.y = !dy ? yc : dy * insideFactor < 0 ? y2 : y1;
        d.align = extension_Aligns[dx * insideFactor + 1];
        d.baseline = extension_Baselines[dy * insideFactor + 1];
        bm0.setRange(_x1, _y1, _x2, _y2);
        return true;
      }
    }
    return false;
  };
}

// Test if a label with the given dimensions can be added without overlap
function extension_test(_x1, _x2, _y1, _y2, bm0, bm1, x1, x2, y1, y2, boundary, isInside) {
  return !(bm0.outOfBounds(_x1, _y1, _x2, _y2) || (isInside && bm1 || bm0).getRange(_x1, _y1, _x2, _y2));
}

// 8-bit representation of anchors
const extension_TOP = 0x0,
  extension_MIDDLE = 0x4,
  extension_BOTTOM = 0x8,
  extension_LEFT = 0x0,
  extension_CENTER = 0x1,
  extension_RIGHT = 0x2;

// Mapping from text anchor to number representation
const extension_anchorCode = {
  'top-left': extension_TOP + extension_LEFT,
  'top': extension_TOP + extension_CENTER,
  'top-right': extension_TOP + extension_RIGHT,
  'left': extension_MIDDLE + extension_LEFT,
  'middle': extension_MIDDLE + extension_CENTER,
  'right': extension_MIDDLE + extension_RIGHT,
  'bottom-left': extension_BOTTOM + extension_LEFT,
  'bottom': extension_BOTTOM + extension_CENTER,
  'bottom-right': extension_BOTTOM + extension_RIGHT
};
const extension_placeAreaLabel = {
  'naive': extension_placeAreaLabelNaive,
  'reduced-search': extension_placeAreaLabelReducedSearch,
  'floodfill': extension_placeAreaLabelFloodFill
};
function extension_labelLayout (texts, size, compare, offset, anchor, avoidMarks, avoidBaseMark, lineAnchor, markIndex, padding, method) {
  // early exit for empty data
  if (!texts.length) return texts;
  const positions = Math.max(offset.length, anchor.length),
    offsets = extension_getOffsets(offset, positions),
    anchors = extension_getAnchors(anchor, positions),
    marktype = extension_markType(texts[0].datum),
    grouptype = marktype === 'group' && texts[0].datum.items[markIndex].marktype,
    isGroupArea = grouptype === 'area',
    boundary = extension_markBoundary(marktype, grouptype, lineAnchor, markIndex),
    infPadding = padding === null || padding === Infinity,
    isNaiveGroupArea = isGroupArea && method === 'naive';
  let maxTextWidth = -1,
    maxTextHeight = -1;

  // prepare text mark data for placing
  const data = texts.map(d => {
    const textWidth = infPadding ? extension_textMetrics.width(d, d.text) : undefined;
    maxTextWidth = Math.max(maxTextWidth, textWidth);
    maxTextHeight = Math.max(maxTextHeight, d.fontSize);
    return {
      datum: d,
      opacity: 0,
      x: undefined,
      y: undefined,
      align: undefined,
      baseline: undefined,
      boundary: boundary(d),
      textWidth
    };
  });
  padding = padding === null || padding === Infinity ? Math.max(maxTextWidth, maxTextHeight) + Math.max(...offset) : padding;
  const $ = extension_scaler(size[0], size[1], padding);
  let bitmaps;
  if (!isNaiveGroupArea) {
    // sort labels in priority order, if comparator is provided
    if (compare) {
      data.sort((a, b) => compare(a.datum, b.datum));
    }

    // flag indicating if label can be placed inside its base mark
    let labelInside = false;
    for (let i = 0; i < anchors.length && !labelInside; ++i) {
      // label inside if anchor is at center
      // label inside if offset to be inside the mark bound
      labelInside = anchors[i] === 0x5 || offsets[i] < 0;
    }

    // extract data information from base mark when base mark is to be avoided
    // base mark is implicitly avoided if it is a group area
    const baseMark = (marktype && avoidBaseMark || isGroupArea) && texts.map(d => d.datum);

    // generate bitmaps for layout calculation
    bitmaps = avoidMarks.length || baseMark ? extension_markBitmaps($, baseMark || [], avoidMarks, labelInside, isGroupArea) : extension_baseBitmaps($, avoidBaseMark && data);
  }

  // generate label placement function
  const place = isGroupArea ? extension_placeAreaLabel[method]($, bitmaps, avoidBaseMark, markIndex) : extension_placeMarkLabel($, bitmaps, anchors, offsets);

  // place all labels
  data.forEach(d => d.opacity = +place(d));
  return data;
}
function extension_getOffsets(_, count) {
  const offsets = new Float64Array(count),
    n = _.length;
  for (let i = 0; i < n; ++i) offsets[i] = _[i] || 0;
  for (let i = n; i < count; ++i) offsets[i] = offsets[n - 1];
  return offsets;
}
function extension_getAnchors(_, count) {
  const anchors = new Int8Array(count),
    n = _.length;
  for (let i = 0; i < n; ++i) anchors[i] |= extension_anchorCode[_[i]];
  for (let i = n; i < count; ++i) anchors[i] = anchors[n - 1];
  return anchors;
}
function extension_markType(item) {
  return item && item.mark && item.mark.marktype;
}

/**
 * Factory function for function for getting base mark boundary, depending
 * on mark and group type. When mark type is undefined, line or area: boundary
 * is the coordinate of each data point. When base mark is grouped line,
 * boundary is either at the start or end of the line depending on the
 * value of lineAnchor. Otherwise, use bounds of base mark.
 */
function extension_markBoundary(marktype, grouptype, lineAnchor, markIndex) {
  const xy = d => [d.x, d.x, d.x, d.y, d.y, d.y];
  if (!marktype) {
    return xy; // no reactive geometry
  } else if (marktype === 'line' || marktype === 'area') {
    return d => xy(d.datum);
  } else if (grouptype === 'line') {
    return d => {
      const items = d.datum.items[markIndex].items;
      return xy(items.length ? items[lineAnchor === 'start' ? 0 : items.length - 1] : {
        x: NaN,
        y: NaN
      });
    };
  } else {
    return d => {
      const b = d.datum.bounds;
      return [b.x1, (b.x1 + b.x2) / 2, b.x2, b.y1, (b.y1 + b.y2) / 2, b.y2];
    };
  }
}

const extension_vega_label_module_Output = ['x', 'y', 'opacity', 'align', 'baseline'];
const extension_Anchors = ['top-left', 'left', 'bottom-left', 'top', 'bottom', 'top-right', 'right', 'bottom-right'];

/**
 * Compute text label layout to annotate marks.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<number>} params.size - The size of the layout, provided as a [width, height] array.
 * @param {function(*,*): number} [params.sort] - An optional
 *   comparator function for sorting label data in priority order.
 * @param {Array<string>} [params.anchor] - Label anchor points relative to the base mark bounding box.
 *   The available options are 'top-left', 'left', 'bottom-left', 'top',
 *   'bottom', 'top-right', 'right', 'bottom-right', 'middle'.
 * @param {Array<number>} [params.offset] - Label offsets (in pixels) from the base mark bounding box.
 *   This parameter is parallel to the list of anchor points.
 * @param {number | null} [params.padding=0] - The amount (in pixels) that a label may exceed the layout size.
 *   If this parameter is null, a label may exceed the layout size without any boundary.
 * @param {string} [params.lineAnchor='end'] - For group line mark labels only, indicates the anchor
 *   position for labels. One of 'start' or 'end'.
 * @param {string} [params.markIndex=0] - For group mark labels only, an index indicating
 *   which mark within the group should be labeled.
 * @param {Array<number>} [params.avoidMarks] - A list of additional mark names for which the label
 *   layout should avoid overlap.
 * @param {boolean} [params.avoidBaseMark=true] - Boolean flag indicating if labels should avoid
 *   overlap with the underlying base mark being labeled.
 * @param {string} [params.method='naive'] - For area make labels only, a method for
 *   place labels. One of 'naive', 'reduced-search', or 'floodfill'.
 * @param {Array<string>} [params.as] - The output fields written by the transform.
 *   The default is ['x', 'y', 'opacity', 'align', 'baseline'].
 */
function extension_Label(params) {
  extension_Transform.call(this, null, params);
}
extension_Label.Definition = {
  type: 'Label',
  metadata: {
    modifies: true
  },
  params: [{
    name: 'size',
    type: 'number',
    array: true,
    length: 2,
    required: true
  }, {
    name: 'sort',
    type: 'compare'
  }, {
    name: 'anchor',
    type: 'string',
    array: true,
    default: extension_Anchors
  }, {
    name: 'offset',
    type: 'number',
    array: true,
    default: [1]
  }, {
    name: 'padding',
    type: 'number',
    default: 0,
    null: true
  }, {
    name: 'lineAnchor',
    type: 'string',
    values: ['start', 'end'],
    default: 'end'
  }, {
    name: 'markIndex',
    type: 'number',
    default: 0
  }, {
    name: 'avoidBaseMark',
    type: 'boolean',
    default: true
  }, {
    name: 'avoidMarks',
    type: 'data',
    array: true
  }, {
    name: 'method',
    type: 'string',
    default: 'naive'
  }, {
    name: 'as',
    type: 'string',
    array: true,
    length: extension_vega_label_module_Output.length,
    default: extension_vega_label_module_Output
  }]
};
extension_inherits(extension_Label, extension_Transform, {
  transform(_, pulse) {
    function modp(param) {
      const p = _[param];
      return extension_vega_util_module_isFunction(p) && pulse.modified(p.fields);
    }
    const mod = _.modified();
    if (!(mod || pulse.changed(pulse.ADD_REM) || modp('sort'))) return;
    if (!_.size || _.size.length !== 2) {
      extension_vega_util_module_error('Size parameter should be specified as a [width, height] array.');
    }
    const as = _.as || extension_vega_label_module_Output;

    // run label layout
    extension_labelLayout(pulse.materialize(pulse.SOURCE).source || [], _.size, _.sort, extension_vega_util_module_array(_.offset == null ? 1 : _.offset), extension_vega_util_module_array(_.anchor || extension_Anchors), _.avoidMarks || [], _.avoidBaseMark !== false, _.lineAnchor || 'end', _.markIndex || 0, _.padding === undefined ? 0 : _.padding, _.method || 'naive').forEach(l => {
      // write layout results to data stream
      const t = l.datum;
      t[as[0]] = l.x;
      t[as[1]] = l.y;
      t[as[2]] = l.opacity;
      t[as[3]] = l.align;
      t[as[4]] = l.baseline;
    });
    return pulse.reflow(mod).modifies(as);
  }
});



;// ../../node_modules/vega-regression/build/vega-regression.module.js




function extension_vega_regression_module_partition (data, groupby) {
  var groups = [],
    get = function (f) {
      return f(t);
    },
    map,
    i,
    n,
    t,
    k,
    g;

  // partition data points into stack groups
  if (groupby == null) {
    groups.push(data);
  } else {
    for (map = {}, i = 0, n = data.length; i < n; ++i) {
      t = data[i];
      k = groupby.map(get);
      g = map[k];
      if (!g) {
        map[k] = g = [];
        g.dims = k;
        groups.push(g);
      }
      g.push(t);
    }
  }
  return groups;
}

/**
 * Compute locally-weighted regression fits for one or more data groups.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.x - An accessor for the predictor data field.
 * @param {function(object): *} params.y - An accessor for the predicted data field.
 * @param {Array<function(object): *>} [params.groupby] - An array of accessors to groupby.
 * @param {number} [params.bandwidth=0.3] - The loess bandwidth.
 */
function extension_Loess(params) {
  extension_Transform.call(this, null, params);
}
extension_Loess.Definition = {
  'type': 'Loess',
  'metadata': {
    'generates': true
  },
  'params': [{
    'name': 'x',
    'type': 'field',
    'required': true
  }, {
    'name': 'y',
    'type': 'field',
    'required': true
  }, {
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'bandwidth',
    'type': 'number',
    'default': 0.3
  }, {
    'name': 'as',
    'type': 'string',
    'array': true
  }]
};
extension_inherits(extension_Loess, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS);
    if (!this.value || pulse.changed() || _.modified()) {
      const source = pulse.materialize(pulse.SOURCE).source,
        groups = extension_vega_regression_module_partition(source, _.groupby),
        names = (_.groupby || []).map(extension_accessorName),
        m = names.length,
        as = _.as || [extension_accessorName(_.x), extension_accessorName(_.y)],
        values = [];
      groups.forEach(g => {
        extension_loess(g, _.x, _.y, _.bandwidth || 0.3).forEach(p => {
          const t = {};
          for (let i = 0; i < m; ++i) {
            t[names[i]] = g.dims[i];
          }
          t[as[0]] = p[0];
          t[as[1]] = p[1];
          values.push(extension_ingest$1(t));
        });
      });
      if (this.value) out.rem = this.value;
      this.value = out.add = out.source = values;
    }
    return out;
  }
});

const extension_vega_regression_module_Methods = {
  constant: extension_vega_statistics_module_constant,
  linear: extension_linear,
  log: extension_vega_statistics_module_log,
  exp: extension_vega_statistics_module_exp,
  pow: extension_vega_statistics_module_pow,
  quad: extension_quad,
  poly: extension_poly
};
const extension_degreesOfFreedom = (method, order) => method === 'poly' ? order : method === 'quad' ? 2 : 1;

/**
 * Compute regression fits for one or more data groups.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {function(object): *} params.x - An accessor for the predictor data field.
 * @param {function(object): *} params.y - An accessor for the predicted data field.
 * @param {string} [params.method='linear'] - The regression method to apply.
 * @param {Array<function(object): *>} [params.groupby] - An array of accessors to groupby.
 * @param {Array<number>} [params.extent] - The domain extent over which to plot the regression line.
 * @param {number} [params.order=3] - The polynomial order. Only applies to the 'poly' method.
 */
function extension_Regression(params) {
  extension_Transform.call(this, null, params);
}
extension_Regression.Definition = {
  'type': 'Regression',
  'metadata': {
    'generates': true
  },
  'params': [{
    'name': 'x',
    'type': 'field',
    'required': true
  }, {
    'name': 'y',
    'type': 'field',
    'required': true
  }, {
    'name': 'groupby',
    'type': 'field',
    'array': true
  }, {
    'name': 'method',
    'type': 'string',
    'default': 'linear',
    'values': Object.keys(extension_vega_regression_module_Methods)
  }, {
    'name': 'order',
    'type': 'number',
    'default': 3
  }, {
    'name': 'extent',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'params',
    'type': 'boolean',
    'default': false
  }, {
    'name': 'as',
    'type': 'string',
    'array': true
  }]
};
extension_inherits(extension_Regression, extension_Transform, {
  transform(_, pulse) {
    const out = pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS);
    if (!this.value || pulse.changed() || _.modified()) {
      const source = pulse.materialize(pulse.SOURCE).source,
        groups = extension_vega_regression_module_partition(source, _.groupby),
        names = (_.groupby || []).map(extension_accessorName),
        method = _.method || 'linear',
        order = _.order == null ? 3 : _.order,
        dof = extension_degreesOfFreedom(method, order),
        as = _.as || [extension_accessorName(_.x), extension_accessorName(_.y)],
        fit = extension_vega_regression_module_Methods[method],
        values = [];
      let domain = _.extent;
      if (!extension_vega_util_module_has(extension_vega_regression_module_Methods, method)) {
        extension_vega_util_module_error('Invalid regression method: ' + method);
      }
      if (domain != null) {
        if (method === 'log' && domain[0] <= 0) {
          pulse.dataflow.warn('Ignoring extent with values <= 0 for log regression.');
          domain = null;
        }
      }
      groups.forEach(g => {
        const n = g.length;
        if (n <= dof) {
          pulse.dataflow.warn('Skipping regression with more parameters than data points.');
          return;
        }
        const model = fit(g, _.x, _.y, order);
        if (_.params) {
          // if parameter vectors requested return those
          values.push(extension_ingest$1({
            keys: g.dims,
            coef: model.coef,
            rSquared: model.rSquared
          }));
          return;
        }
        const dom = domain || extension_extent(g, _.x),
          add = p => {
            const t = {};
            for (let i = 0; i < names.length; ++i) {
              t[names[i]] = g.dims[i];
            }
            t[as[0]] = p[0];
            t[as[1]] = p[1];
            values.push(extension_ingest$1(t));
          };
        if (method === 'linear' || method === 'constant') {
          // for linear or constant regression we only need the end points
          dom.forEach(x => add([x, model.predict(x)]));
        } else {
          // otherwise return trend line sample points
          extension_sampleCurve(model.predict, dom, 25, 200).forEach(add);
        }
      });
      if (this.value) out.rem = this.value;
      this.value = out.add = out.source = values;
    }
    return out;
  }
});



;// ../../node_modules/robust-predicates/esm/util.js
const extension_util_epsilon = 1.1102230246251565e-16;
const extension_util_splitter = 134217729;
const extension_util_resulterrbound = (3 + 8 * extension_util_epsilon) * extension_util_epsilon;

// fast_expansion_sum_zeroelim routine from oritinal code
function extension_util_sum(elen, e, flen, f, h) {
    let Q, Qnew, hh, bvirt;
    let enow = e[0];
    let fnow = f[0];
    let eindex = 0;
    let findex = 0;
    if ((fnow > enow) === (fnow > -enow)) {
        Q = enow;
        enow = e[++eindex];
    } else {
        Q = fnow;
        fnow = f[++findex];
    }
    let hindex = 0;
    if (eindex < elen && findex < flen) {
        if ((fnow > enow) === (fnow > -enow)) {
            Qnew = enow + Q;
            hh = Q - (Qnew - enow);
            enow = e[++eindex];
        } else {
            Qnew = fnow + Q;
            hh = Q - (Qnew - fnow);
            fnow = f[++findex];
        }
        Q = Qnew;
        if (hh !== 0) {
            h[hindex++] = hh;
        }
        while (eindex < elen && findex < flen) {
            if ((fnow > enow) === (fnow > -enow)) {
                Qnew = Q + enow;
                bvirt = Qnew - Q;
                hh = Q - (Qnew - bvirt) + (enow - bvirt);
                enow = e[++eindex];
            } else {
                Qnew = Q + fnow;
                bvirt = Qnew - Q;
                hh = Q - (Qnew - bvirt) + (fnow - bvirt);
                fnow = f[++findex];
            }
            Q = Qnew;
            if (hh !== 0) {
                h[hindex++] = hh;
            }
        }
    }
    while (eindex < elen) {
        Qnew = Q + enow;
        bvirt = Qnew - Q;
        hh = Q - (Qnew - bvirt) + (enow - bvirt);
        enow = e[++eindex];
        Q = Qnew;
        if (hh !== 0) {
            h[hindex++] = hh;
        }
    }
    while (findex < flen) {
        Qnew = Q + fnow;
        bvirt = Qnew - Q;
        hh = Q - (Qnew - bvirt) + (fnow - bvirt);
        fnow = f[++findex];
        Q = Qnew;
        if (hh !== 0) {
            h[hindex++] = hh;
        }
    }
    if (Q !== 0 || hindex === 0) {
        h[hindex++] = Q;
    }
    return hindex;
}

function extension_util_sum_three(alen, a, blen, b, clen, c, tmp, out) {
    return extension_util_sum(extension_util_sum(alen, a, blen, b, tmp), tmp, clen, c, out);
}

// scale_expansion_zeroelim routine from oritinal code
function extension_util_scale(elen, e, b, h) {
    let Q, sum, hh, product1, product0;
    let bvirt, c, ahi, alo, bhi, blo;

    c = extension_util_splitter * b;
    bhi = c - (c - b);
    blo = b - bhi;
    let enow = e[0];
    Q = enow * b;
    c = extension_util_splitter * enow;
    ahi = c - (c - enow);
    alo = enow - ahi;
    hh = alo * blo - (Q - ahi * bhi - alo * bhi - ahi * blo);
    let hindex = 0;
    if (hh !== 0) {
        h[hindex++] = hh;
    }
    for (let i = 1; i < elen; i++) {
        enow = e[i];
        product1 = enow * b;
        c = extension_util_splitter * enow;
        ahi = c - (c - enow);
        alo = enow - ahi;
        product0 = alo * blo - (product1 - ahi * bhi - alo * bhi - ahi * blo);
        sum = Q + product0;
        bvirt = sum - Q;
        hh = Q - (sum - bvirt) + (product0 - bvirt);
        if (hh !== 0) {
            h[hindex++] = hh;
        }
        Q = product1 + sum;
        hh = sum - (Q - product1);
        if (hh !== 0) {
            h[hindex++] = hh;
        }
    }
    if (Q !== 0 || hindex === 0) {
        h[hindex++] = Q;
    }
    return hindex;
}

function extension_util_negate(elen, e) {
    for (let i = 0; i < elen; i++) e[i] = -e[i];
    return elen;
}

function extension_util_estimate(elen, e) {
    let Q = e[0];
    for (let i = 1; i < elen; i++) Q += e[i];
    return Q;
}

function extension_vec(n) {
    return new Float64Array(n);
}

;// ../../node_modules/robust-predicates/esm/orient2d.js


const extension_ccwerrboundA = (3 + 16 * extension_util_epsilon) * extension_util_epsilon;
const extension_ccwerrboundB = (2 + 12 * extension_util_epsilon) * extension_util_epsilon;
const extension_ccwerrboundC = (9 + 64 * extension_util_epsilon) * extension_util_epsilon * extension_util_epsilon;

const extension_orient2d_B = extension_vec(4);
const extension_C1 = extension_vec(8);
const extension_C2 = extension_vec(12);
const extension_orient2d_D = extension_vec(16);
const extension_u = extension_vec(4);

function extension_orient2dadapt(ax, ay, bx, by, cx, cy, detsum) {
    let acxtail, acytail, bcxtail, bcytail;
    let bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;

    const acx = ax - cx;
    const bcx = bx - cx;
    const acy = ay - cy;
    const bcy = by - cy;

    s1 = acx * bcy;
    c = extension_util_splitter * acx;
    ahi = c - (c - acx);
    alo = acx - ahi;
    c = extension_util_splitter * bcy;
    bhi = c - (c - bcy);
    blo = bcy - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = acy * bcx;
    c = extension_util_splitter * acy;
    ahi = c - (c - acy);
    alo = acy - ahi;
    c = extension_util_splitter * bcx;
    bhi = c - (c - bcx);
    blo = bcx - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_orient2d_B[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_orient2d_B[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_orient2d_B[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_orient2d_B[3] = u3;

    let det = extension_util_estimate(4, extension_orient2d_B);
    let errbound = extension_ccwerrboundB * detsum;
    if (det >= errbound || -det >= errbound) {
        return det;
    }

    bvirt = ax - acx;
    acxtail = ax - (acx + bvirt) + (bvirt - cx);
    bvirt = bx - bcx;
    bcxtail = bx - (bcx + bvirt) + (bvirt - cx);
    bvirt = ay - acy;
    acytail = ay - (acy + bvirt) + (bvirt - cy);
    bvirt = by - bcy;
    bcytail = by - (bcy + bvirt) + (bvirt - cy);

    if (acxtail === 0 && acytail === 0 && bcxtail === 0 && bcytail === 0) {
        return det;
    }

    errbound = extension_ccwerrboundC * detsum + extension_util_resulterrbound * Math.abs(det);
    det += (acx * bcytail + bcy * acxtail) - (acy * bcxtail + bcx * acytail);
    if (det >= errbound || -det >= errbound) return det;

    s1 = acxtail * bcy;
    c = extension_util_splitter * acxtail;
    ahi = c - (c - acxtail);
    alo = acxtail - ahi;
    c = extension_util_splitter * bcy;
    bhi = c - (c - bcy);
    blo = bcy - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = acytail * bcx;
    c = extension_util_splitter * acytail;
    ahi = c - (c - acytail);
    alo = acytail - ahi;
    c = extension_util_splitter * bcx;
    bhi = c - (c - bcx);
    blo = bcx - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_u[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_u[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_u[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_u[3] = u3;
    const C1len = extension_util_sum(4, extension_orient2d_B, 4, extension_u, extension_C1);

    s1 = acx * bcytail;
    c = extension_util_splitter * acx;
    ahi = c - (c - acx);
    alo = acx - ahi;
    c = extension_util_splitter * bcytail;
    bhi = c - (c - bcytail);
    blo = bcytail - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = acy * bcxtail;
    c = extension_util_splitter * acy;
    ahi = c - (c - acy);
    alo = acy - ahi;
    c = extension_util_splitter * bcxtail;
    bhi = c - (c - bcxtail);
    blo = bcxtail - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_u[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_u[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_u[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_u[3] = u3;
    const C2len = extension_util_sum(C1len, extension_C1, 4, extension_u, extension_C2);

    s1 = acxtail * bcytail;
    c = extension_util_splitter * acxtail;
    ahi = c - (c - acxtail);
    alo = acxtail - ahi;
    c = extension_util_splitter * bcytail;
    bhi = c - (c - bcytail);
    blo = bcytail - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = acytail * bcxtail;
    c = extension_util_splitter * acytail;
    ahi = c - (c - acytail);
    alo = acytail - ahi;
    c = extension_util_splitter * bcxtail;
    bhi = c - (c - bcxtail);
    blo = bcxtail - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_u[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_u[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_u[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_u[3] = u3;
    const Dlen = extension_util_sum(C2len, extension_C2, 4, extension_u, extension_orient2d_D);

    return extension_orient2d_D[Dlen - 1];
}

function extension_orient2d(ax, ay, bx, by, cx, cy) {
    const detleft = (ay - cy) * (bx - cx);
    const detright = (ax - cx) * (by - cy);
    const det = detleft - detright;

    const detsum = Math.abs(detleft + detright);
    if (Math.abs(det) >= extension_ccwerrboundA * detsum) return det;

    return -extension_orient2dadapt(ax, ay, bx, by, cx, cy, detsum);
}

function extension_orient2dfast(ax, ay, bx, by, cx, cy) {
    return (ay - cy) * (bx - cx) - (ax - cx) * (by - cy);
}

;// ../../node_modules/robust-predicates/esm/orient3d.js


const extension_o3derrboundA = (7 + 56 * extension_util_epsilon) * extension_util_epsilon;
const extension_o3derrboundB = (3 + 28 * extension_util_epsilon) * extension_util_epsilon;
const extension_o3derrboundC = (26 + 288 * extension_util_epsilon) * extension_util_epsilon * extension_util_epsilon;

const extension_bc = extension_vec(4);
const extension_ca = extension_vec(4);
const extension_ab = extension_vec(4);
const extension_at_b = extension_vec(4);
const extension_at_c = extension_vec(4);
const extension_bt_c = extension_vec(4);
const extension_bt_a = extension_vec(4);
const extension_ct_a = extension_vec(4);
const extension_ct_b = extension_vec(4);
const extension_bct = extension_vec(8);
const extension_cat = extension_vec(8);
const extension_abt = extension_vec(8);
const extension_orient3d_u = extension_vec(4);

const extension_8 = extension_vec(8);
const extension_8b = extension_vec(8);
const extension_16 = extension_vec(8);
const extension_12 = extension_vec(12);

let extension_fin = extension_vec(192);
let extension_fin2 = extension_vec(192);

function extension_finadd(finlen, alen, a) {
    finlen = sum(finlen, extension_fin, alen, a, extension_fin2);
    const tmp = extension_fin; extension_fin = extension_fin2; extension_fin2 = tmp;
    return finlen;
}

function extension_tailinit(xtail, ytail, ax, ay, bx, by, a, b) {
    let bvirt, c, ahi, alo, bhi, blo, _i, _j, _k, _0, s1, s0, t1, t0, u3, negate;
    if (xtail === 0) {
        if (ytail === 0) {
            a[0] = 0;
            b[0] = 0;
            return 1;
        } else {
            negate = -ytail;
            s1 = negate * ax;
            c = splitter * negate;
            ahi = c - (c - negate);
            alo = negate - ahi;
            c = splitter * ax;
            bhi = c - (c - ax);
            blo = ax - bhi;
            a[0] = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            a[1] = s1;
            s1 = ytail * bx;
            c = splitter * ytail;
            ahi = c - (c - ytail);
            alo = ytail - ahi;
            c = splitter * bx;
            bhi = c - (c - bx);
            blo = bx - bhi;
            b[0] = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            b[1] = s1;
            return 2;
        }
    } else {
        if (ytail === 0) {
            s1 = xtail * ay;
            c = splitter * xtail;
            ahi = c - (c - xtail);
            alo = xtail - ahi;
            c = splitter * ay;
            bhi = c - (c - ay);
            blo = ay - bhi;
            a[0] = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            a[1] = s1;
            negate = -xtail;
            s1 = negate * by;
            c = splitter * negate;
            ahi = c - (c - negate);
            alo = negate - ahi;
            c = splitter * by;
            bhi = c - (c - by);
            blo = by - bhi;
            b[0] = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            b[1] = s1;
            return 2;
        } else {
            s1 = xtail * ay;
            c = splitter * xtail;
            ahi = c - (c - xtail);
            alo = xtail - ahi;
            c = splitter * ay;
            bhi = c - (c - ay);
            blo = ay - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = ytail * ax;
            c = splitter * ytail;
            ahi = c - (c - ytail);
            alo = ytail - ahi;
            c = splitter * ax;
            bhi = c - (c - ax);
            blo = ax - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 - t0;
            bvirt = s0 - _i;
            a[0] = s0 - (_i + bvirt) + (bvirt - t0);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 - t1;
            bvirt = _0 - _i;
            a[1] = _0 - (_i + bvirt) + (bvirt - t1);
            u3 = _j + _i;
            bvirt = u3 - _j;
            a[2] = _j - (u3 - bvirt) + (_i - bvirt);
            a[3] = u3;
            s1 = ytail * bx;
            c = splitter * ytail;
            ahi = c - (c - ytail);
            alo = ytail - ahi;
            c = splitter * bx;
            bhi = c - (c - bx);
            blo = bx - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = xtail * by;
            c = splitter * xtail;
            ahi = c - (c - xtail);
            alo = xtail - ahi;
            c = splitter * by;
            bhi = c - (c - by);
            blo = by - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 - t0;
            bvirt = s0 - _i;
            b[0] = s0 - (_i + bvirt) + (bvirt - t0);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 - t1;
            bvirt = _0 - _i;
            b[1] = _0 - (_i + bvirt) + (bvirt - t1);
            u3 = _j + _i;
            bvirt = u3 - _j;
            b[2] = _j - (u3 - bvirt) + (_i - bvirt);
            b[3] = u3;
            return 4;
        }
    }
}

function extension_tailadd(finlen, a, b, k, z) {
    let bvirt, c, ahi, alo, bhi, blo, _i, _j, _k, _0, s1, s0, u3;
    s1 = a * b;
    c = splitter * a;
    ahi = c - (c - a);
    alo = a - ahi;
    c = splitter * b;
    bhi = c - (c - b);
    blo = b - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    c = splitter * k;
    bhi = c - (c - k);
    blo = k - bhi;
    _i = s0 * k;
    c = splitter * s0;
    ahi = c - (c - s0);
    alo = s0 - ahi;
    extension_orient3d_u[0] = alo * blo - (_i - ahi * bhi - alo * bhi - ahi * blo);
    _j = s1 * k;
    c = splitter * s1;
    ahi = c - (c - s1);
    alo = s1 - ahi;
    _0 = alo * blo - (_j - ahi * bhi - alo * bhi - ahi * blo);
    _k = _i + _0;
    bvirt = _k - _i;
    extension_orient3d_u[1] = _i - (_k - bvirt) + (_0 - bvirt);
    u3 = _j + _k;
    extension_orient3d_u[2] = _k - (u3 - _j);
    extension_orient3d_u[3] = u3;
    finlen = extension_finadd(finlen, 4, extension_orient3d_u);
    if (z !== 0) {
        c = splitter * z;
        bhi = c - (c - z);
        blo = z - bhi;
        _i = s0 * z;
        c = splitter * s0;
        ahi = c - (c - s0);
        alo = s0 - ahi;
        extension_orient3d_u[0] = alo * blo - (_i - ahi * bhi - alo * bhi - ahi * blo);
        _j = s1 * z;
        c = splitter * s1;
        ahi = c - (c - s1);
        alo = s1 - ahi;
        _0 = alo * blo - (_j - ahi * bhi - alo * bhi - ahi * blo);
        _k = _i + _0;
        bvirt = _k - _i;
        extension_orient3d_u[1] = _i - (_k - bvirt) + (_0 - bvirt);
        u3 = _j + _k;
        extension_orient3d_u[2] = _k - (u3 - _j);
        extension_orient3d_u[3] = u3;
        finlen = extension_finadd(finlen, 4, extension_orient3d_u);
    }
    return finlen;
}

function extension_orient3dadapt(ax, ay, az, bx, by, bz, cx, cy, cz, dx, dy, dz, permanent) {
    let finlen;
    let adxtail, bdxtail, cdxtail;
    let adytail, bdytail, cdytail;
    let adztail, bdztail, cdztail;
    let bvirt, c, ahi, alo, bhi, blo, _i, _j, _k, _0, s1, s0, t1, t0, u3;

    const adx = ax - dx;
    const bdx = bx - dx;
    const cdx = cx - dx;
    const ady = ay - dy;
    const bdy = by - dy;
    const cdy = cy - dy;
    const adz = az - dz;
    const bdz = bz - dz;
    const cdz = cz - dz;

    s1 = bdx * cdy;
    c = splitter * bdx;
    ahi = c - (c - bdx);
    alo = bdx - ahi;
    c = splitter * cdy;
    bhi = c - (c - cdy);
    blo = cdy - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = cdx * bdy;
    c = splitter * cdx;
    ahi = c - (c - cdx);
    alo = cdx - ahi;
    c = splitter * bdy;
    bhi = c - (c - bdy);
    blo = bdy - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_bc[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_bc[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_bc[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_bc[3] = u3;
    s1 = cdx * ady;
    c = splitter * cdx;
    ahi = c - (c - cdx);
    alo = cdx - ahi;
    c = splitter * ady;
    bhi = c - (c - ady);
    blo = ady - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = adx * cdy;
    c = splitter * adx;
    ahi = c - (c - adx);
    alo = adx - ahi;
    c = splitter * cdy;
    bhi = c - (c - cdy);
    blo = cdy - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_ca[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_ca[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_ca[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_ca[3] = u3;
    s1 = adx * bdy;
    c = splitter * adx;
    ahi = c - (c - adx);
    alo = adx - ahi;
    c = splitter * bdy;
    bhi = c - (c - bdy);
    blo = bdy - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = bdx * ady;
    c = splitter * bdx;
    ahi = c - (c - bdx);
    alo = bdx - ahi;
    c = splitter * ady;
    bhi = c - (c - ady);
    blo = ady - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_ab[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_ab[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_ab[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_ab[3] = u3;

    finlen = sum(
        sum(
            scale(4, extension_bc, adz, extension_8), extension_8,
            scale(4, extension_ca, bdz, extension_8b), extension_8b, extension_16), extension_16,
        scale(4, extension_ab, cdz, extension_8), extension_8, extension_fin);

    let det = estimate(finlen, extension_fin);
    let errbound = extension_o3derrboundB * permanent;
    if (det >= errbound || -det >= errbound) {
        return det;
    }

    bvirt = ax - adx;
    adxtail = ax - (adx + bvirt) + (bvirt - dx);
    bvirt = bx - bdx;
    bdxtail = bx - (bdx + bvirt) + (bvirt - dx);
    bvirt = cx - cdx;
    cdxtail = cx - (cdx + bvirt) + (bvirt - dx);
    bvirt = ay - ady;
    adytail = ay - (ady + bvirt) + (bvirt - dy);
    bvirt = by - bdy;
    bdytail = by - (bdy + bvirt) + (bvirt - dy);
    bvirt = cy - cdy;
    cdytail = cy - (cdy + bvirt) + (bvirt - dy);
    bvirt = az - adz;
    adztail = az - (adz + bvirt) + (bvirt - dz);
    bvirt = bz - bdz;
    bdztail = bz - (bdz + bvirt) + (bvirt - dz);
    bvirt = cz - cdz;
    cdztail = cz - (cdz + bvirt) + (bvirt - dz);

    if (adxtail === 0 && bdxtail === 0 && cdxtail === 0 &&
        adytail === 0 && bdytail === 0 && cdytail === 0 &&
        adztail === 0 && bdztail === 0 && cdztail === 0) {
        return det;
    }

    errbound = extension_o3derrboundC * permanent + resulterrbound * Math.abs(det);
    det +=
        adz * (bdx * cdytail + cdy * bdxtail - (bdy * cdxtail + cdx * bdytail)) + adztail * (bdx * cdy - bdy * cdx) +
        bdz * (cdx * adytail + ady * cdxtail - (cdy * adxtail + adx * cdytail)) + bdztail * (cdx * ady - cdy * adx) +
        cdz * (adx * bdytail + bdy * adxtail - (ady * bdxtail + bdx * adytail)) + cdztail * (adx * bdy - ady * bdx);
    if (det >= errbound || -det >= errbound) {
        return det;
    }

    const at_len = extension_tailinit(adxtail, adytail, bdx, bdy, cdx, cdy, extension_at_b, extension_at_c);
    const bt_len = extension_tailinit(bdxtail, bdytail, cdx, cdy, adx, ady, extension_bt_c, extension_bt_a);
    const ct_len = extension_tailinit(cdxtail, cdytail, adx, ady, bdx, bdy, extension_ct_a, extension_ct_b);

    const bctlen = sum(bt_len, extension_bt_c, ct_len, extension_ct_b, extension_bct);
    finlen = extension_finadd(finlen, scale(bctlen, extension_bct, adz, extension_16), extension_16);

    const catlen = sum(ct_len, extension_ct_a, at_len, extension_at_c, extension_cat);
    finlen = extension_finadd(finlen, scale(catlen, extension_cat, bdz, extension_16), extension_16);

    const abtlen = sum(at_len, extension_at_b, bt_len, extension_bt_a, extension_abt);
    finlen = extension_finadd(finlen, scale(abtlen, extension_abt, cdz, extension_16), extension_16);

    if (adztail !== 0) {
        finlen = extension_finadd(finlen, scale(4, extension_bc, adztail, extension_12), extension_12);
        finlen = extension_finadd(finlen, scale(bctlen, extension_bct, adztail, extension_16), extension_16);
    }
    if (bdztail !== 0) {
        finlen = extension_finadd(finlen, scale(4, extension_ca, bdztail, extension_12), extension_12);
        finlen = extension_finadd(finlen, scale(catlen, extension_cat, bdztail, extension_16), extension_16);
    }
    if (cdztail !== 0) {
        finlen = extension_finadd(finlen, scale(4, extension_ab, cdztail, extension_12), extension_12);
        finlen = extension_finadd(finlen, scale(abtlen, extension_abt, cdztail, extension_16), extension_16);
    }

    if (adxtail !== 0) {
        if (bdytail !== 0) {
            finlen = extension_tailadd(finlen, adxtail, bdytail, cdz, cdztail);
        }
        if (cdytail !== 0) {
            finlen = extension_tailadd(finlen, -adxtail, cdytail, bdz, bdztail);
        }
    }
    if (bdxtail !== 0) {
        if (cdytail !== 0) {
            finlen = extension_tailadd(finlen, bdxtail, cdytail, adz, adztail);
        }
        if (adytail !== 0) {
            finlen = extension_tailadd(finlen, -bdxtail, adytail, cdz, cdztail);
        }
    }
    if (cdxtail !== 0) {
        if (adytail !== 0) {
            finlen = extension_tailadd(finlen, cdxtail, adytail, bdz, bdztail);
        }
        if (bdytail !== 0) {
            finlen = extension_tailadd(finlen, -cdxtail, bdytail, adz, adztail);
        }
    }

    return extension_fin[finlen - 1];
}

function extension_orient3d(ax, ay, az, bx, by, bz, cx, cy, cz, dx, dy, dz) {
    const adx = ax - dx;
    const bdx = bx - dx;
    const cdx = cx - dx;
    const ady = ay - dy;
    const bdy = by - dy;
    const cdy = cy - dy;
    const adz = az - dz;
    const bdz = bz - dz;
    const cdz = cz - dz;

    const bdxcdy = bdx * cdy;
    const cdxbdy = cdx * bdy;

    const cdxady = cdx * ady;
    const adxcdy = adx * cdy;

    const adxbdy = adx * bdy;
    const bdxady = bdx * ady;

    const det =
        adz * (bdxcdy - cdxbdy) +
        bdz * (cdxady - adxcdy) +
        cdz * (adxbdy - bdxady);

    const permanent =
        (Math.abs(bdxcdy) + Math.abs(cdxbdy)) * Math.abs(adz) +
        (Math.abs(cdxady) + Math.abs(adxcdy)) * Math.abs(bdz) +
        (Math.abs(adxbdy) + Math.abs(bdxady)) * Math.abs(cdz);

    const errbound = extension_o3derrboundA * permanent;
    if (det > errbound || -det > errbound) {
        return det;
    }

    return extension_orient3dadapt(ax, ay, az, bx, by, bz, cx, cy, cz, dx, dy, dz, permanent);
}

function extension_orient3dfast(ax, ay, az, bx, by, bz, cx, cy, cz, dx, dy, dz) {
    const adx = ax - dx;
    const bdx = bx - dx;
    const cdx = cx - dx;
    const ady = ay - dy;
    const bdy = by - dy;
    const cdy = cy - dy;
    const adz = az - dz;
    const bdz = bz - dz;
    const cdz = cz - dz;

    return adx * (bdy * cdz - bdz * cdy) +
        bdx * (cdy * adz - cdz * ady) +
        cdx * (ady * bdz - adz * bdy);
}

;// ../../node_modules/robust-predicates/esm/incircle.js


const extension_iccerrboundA = (10 + 96 * extension_util_epsilon) * extension_util_epsilon;
const extension_iccerrboundB = (4 + 48 * extension_util_epsilon) * extension_util_epsilon;
const extension_iccerrboundC = (44 + 576 * extension_util_epsilon) * extension_util_epsilon * extension_util_epsilon;

const extension_incircle_bc = extension_vec(4);
const extension_incircle_ca = extension_vec(4);
const extension_incircle_ab = extension_vec(4);
const extension_aa = extension_vec(4);
const extension_bb = extension_vec(4);
const extension_cc = extension_vec(4);
const extension_incircle_u = extension_vec(4);
const extension_v = extension_vec(4);
const extension_axtbc = extension_vec(8);
const extension_aytbc = extension_vec(8);
const extension_bxtca = extension_vec(8);
const extension_bytca = extension_vec(8);
const extension_cxtab = extension_vec(8);
const extension_cytab = extension_vec(8);
const extension_incircle_abt = extension_vec(8);
const extension_incircle_bct = extension_vec(8);
const extension_incircle_cat = extension_vec(8);
const extension_abtt = extension_vec(4);
const extension_bctt = extension_vec(4);
const extension_catt = extension_vec(4);

const extension_incircle_8 = extension_vec(8);
const extension_incircle_16 = extension_vec(16);
const extension_16b = extension_vec(16);
const extension_16c = extension_vec(16);
const extension_32 = extension_vec(32);
const extension_32b = extension_vec(32);
const extension_48 = extension_vec(48);
const extension_64 = extension_vec(64);

let extension_incircle_fin = extension_vec(1152);
let extension_incircle_fin2 = extension_vec(1152);

function extension_incircle_finadd(finlen, a, alen) {
    finlen = sum(finlen, extension_incircle_fin, a, alen, extension_incircle_fin2);
    const tmp = extension_incircle_fin; extension_incircle_fin = extension_incircle_fin2; extension_incircle_fin2 = tmp;
    return finlen;
}

function extension_incircleadapt(ax, ay, bx, by, cx, cy, dx, dy, permanent) {
    let finlen;
    let adxtail, bdxtail, cdxtail, adytail, bdytail, cdytail;
    let axtbclen, aytbclen, bxtcalen, bytcalen, cxtablen, cytablen;
    let abtlen, bctlen, catlen;
    let abttlen, bcttlen, cattlen;
    let n1, n0;

    let bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;

    const adx = ax - dx;
    const bdx = bx - dx;
    const cdx = cx - dx;
    const ady = ay - dy;
    const bdy = by - dy;
    const cdy = cy - dy;

    s1 = bdx * cdy;
    c = splitter * bdx;
    ahi = c - (c - bdx);
    alo = bdx - ahi;
    c = splitter * cdy;
    bhi = c - (c - cdy);
    blo = cdy - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = cdx * bdy;
    c = splitter * cdx;
    ahi = c - (c - cdx);
    alo = cdx - ahi;
    c = splitter * bdy;
    bhi = c - (c - bdy);
    blo = bdy - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_incircle_bc[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_incircle_bc[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_incircle_bc[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_incircle_bc[3] = u3;
    s1 = cdx * ady;
    c = splitter * cdx;
    ahi = c - (c - cdx);
    alo = cdx - ahi;
    c = splitter * ady;
    bhi = c - (c - ady);
    blo = ady - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = adx * cdy;
    c = splitter * adx;
    ahi = c - (c - adx);
    alo = adx - ahi;
    c = splitter * cdy;
    bhi = c - (c - cdy);
    blo = cdy - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_incircle_ca[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_incircle_ca[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_incircle_ca[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_incircle_ca[3] = u3;
    s1 = adx * bdy;
    c = splitter * adx;
    ahi = c - (c - adx);
    alo = adx - ahi;
    c = splitter * bdy;
    bhi = c - (c - bdy);
    blo = bdy - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = bdx * ady;
    c = splitter * bdx;
    ahi = c - (c - bdx);
    alo = bdx - ahi;
    c = splitter * ady;
    bhi = c - (c - ady);
    blo = ady - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_incircle_ab[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_incircle_ab[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_incircle_ab[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_incircle_ab[3] = u3;

    finlen = sum(
        sum(
            sum(
                scale(scale(4, extension_incircle_bc, adx, extension_incircle_8), extension_incircle_8, adx, extension_incircle_16), extension_incircle_16,
                scale(scale(4, extension_incircle_bc, ady, extension_incircle_8), extension_incircle_8, ady, extension_16b), extension_16b, extension_32), extension_32,
            sum(
                scale(scale(4, extension_incircle_ca, bdx, extension_incircle_8), extension_incircle_8, bdx, extension_incircle_16), extension_incircle_16,
                scale(scale(4, extension_incircle_ca, bdy, extension_incircle_8), extension_incircle_8, bdy, extension_16b), extension_16b, extension_32b), extension_32b, extension_64), extension_64,
        sum(
            scale(scale(4, extension_incircle_ab, cdx, extension_incircle_8), extension_incircle_8, cdx, extension_incircle_16), extension_incircle_16,
            scale(scale(4, extension_incircle_ab, cdy, extension_incircle_8), extension_incircle_8, cdy, extension_16b), extension_16b, extension_32), extension_32, extension_incircle_fin);

    let det = estimate(finlen, extension_incircle_fin);
    let errbound = extension_iccerrboundB * permanent;
    if (det >= errbound || -det >= errbound) {
        return det;
    }

    bvirt = ax - adx;
    adxtail = ax - (adx + bvirt) + (bvirt - dx);
    bvirt = ay - ady;
    adytail = ay - (ady + bvirt) + (bvirt - dy);
    bvirt = bx - bdx;
    bdxtail = bx - (bdx + bvirt) + (bvirt - dx);
    bvirt = by - bdy;
    bdytail = by - (bdy + bvirt) + (bvirt - dy);
    bvirt = cx - cdx;
    cdxtail = cx - (cdx + bvirt) + (bvirt - dx);
    bvirt = cy - cdy;
    cdytail = cy - (cdy + bvirt) + (bvirt - dy);
    if (adxtail === 0 && bdxtail === 0 && cdxtail === 0 && adytail === 0 && bdytail === 0 && cdytail === 0) {
        return det;
    }

    errbound = extension_iccerrboundC * permanent + resulterrbound * Math.abs(det);
    det += ((adx * adx + ady * ady) * ((bdx * cdytail + cdy * bdxtail) - (bdy * cdxtail + cdx * bdytail)) +
        2 * (adx * adxtail + ady * adytail) * (bdx * cdy - bdy * cdx)) +
        ((bdx * bdx + bdy * bdy) * ((cdx * adytail + ady * cdxtail) - (cdy * adxtail + adx * cdytail)) +
        2 * (bdx * bdxtail + bdy * bdytail) * (cdx * ady - cdy * adx)) +
        ((cdx * cdx + cdy * cdy) * ((adx * bdytail + bdy * adxtail) - (ady * bdxtail + bdx * adytail)) +
        2 * (cdx * cdxtail + cdy * cdytail) * (adx * bdy - ady * bdx));

    if (det >= errbound || -det >= errbound) {
        return det;
    }

    if (bdxtail !== 0 || bdytail !== 0 || cdxtail !== 0 || cdytail !== 0) {
        s1 = adx * adx;
        c = splitter * adx;
        ahi = c - (c - adx);
        alo = adx - ahi;
        s0 = alo * alo - (s1 - ahi * ahi - (ahi + ahi) * alo);
        t1 = ady * ady;
        c = splitter * ady;
        ahi = c - (c - ady);
        alo = ady - ahi;
        t0 = alo * alo - (t1 - ahi * ahi - (ahi + ahi) * alo);
        _i = s0 + t0;
        bvirt = _i - s0;
        extension_aa[0] = s0 - (_i - bvirt) + (t0 - bvirt);
        _j = s1 + _i;
        bvirt = _j - s1;
        _0 = s1 - (_j - bvirt) + (_i - bvirt);
        _i = _0 + t1;
        bvirt = _i - _0;
        extension_aa[1] = _0 - (_i - bvirt) + (t1 - bvirt);
        u3 = _j + _i;
        bvirt = u3 - _j;
        extension_aa[2] = _j - (u3 - bvirt) + (_i - bvirt);
        extension_aa[3] = u3;
    }
    if (cdxtail !== 0 || cdytail !== 0 || adxtail !== 0 || adytail !== 0) {
        s1 = bdx * bdx;
        c = splitter * bdx;
        ahi = c - (c - bdx);
        alo = bdx - ahi;
        s0 = alo * alo - (s1 - ahi * ahi - (ahi + ahi) * alo);
        t1 = bdy * bdy;
        c = splitter * bdy;
        ahi = c - (c - bdy);
        alo = bdy - ahi;
        t0 = alo * alo - (t1 - ahi * ahi - (ahi + ahi) * alo);
        _i = s0 + t0;
        bvirt = _i - s0;
        extension_bb[0] = s0 - (_i - bvirt) + (t0 - bvirt);
        _j = s1 + _i;
        bvirt = _j - s1;
        _0 = s1 - (_j - bvirt) + (_i - bvirt);
        _i = _0 + t1;
        bvirt = _i - _0;
        extension_bb[1] = _0 - (_i - bvirt) + (t1 - bvirt);
        u3 = _j + _i;
        bvirt = u3 - _j;
        extension_bb[2] = _j - (u3 - bvirt) + (_i - bvirt);
        extension_bb[3] = u3;
    }
    if (adxtail !== 0 || adytail !== 0 || bdxtail !== 0 || bdytail !== 0) {
        s1 = cdx * cdx;
        c = splitter * cdx;
        ahi = c - (c - cdx);
        alo = cdx - ahi;
        s0 = alo * alo - (s1 - ahi * ahi - (ahi + ahi) * alo);
        t1 = cdy * cdy;
        c = splitter * cdy;
        ahi = c - (c - cdy);
        alo = cdy - ahi;
        t0 = alo * alo - (t1 - ahi * ahi - (ahi + ahi) * alo);
        _i = s0 + t0;
        bvirt = _i - s0;
        extension_cc[0] = s0 - (_i - bvirt) + (t0 - bvirt);
        _j = s1 + _i;
        bvirt = _j - s1;
        _0 = s1 - (_j - bvirt) + (_i - bvirt);
        _i = _0 + t1;
        bvirt = _i - _0;
        extension_cc[1] = _0 - (_i - bvirt) + (t1 - bvirt);
        u3 = _j + _i;
        bvirt = u3 - _j;
        extension_cc[2] = _j - (u3 - bvirt) + (_i - bvirt);
        extension_cc[3] = u3;
    }

    if (adxtail !== 0) {
        axtbclen = scale(4, extension_incircle_bc, adxtail, extension_axtbc);
        finlen = extension_incircle_finadd(finlen, sum_three(
            scale(axtbclen, extension_axtbc, 2 * adx, extension_incircle_16), extension_incircle_16,
            scale(scale(4, extension_cc, adxtail, extension_incircle_8), extension_incircle_8, bdy, extension_16b), extension_16b,
            scale(scale(4, extension_bb, adxtail, extension_incircle_8), extension_incircle_8, -cdy, extension_16c), extension_16c, extension_32, extension_48), extension_48);
    }
    if (adytail !== 0) {
        aytbclen = scale(4, extension_incircle_bc, adytail, extension_aytbc);
        finlen = extension_incircle_finadd(finlen, sum_three(
            scale(aytbclen, extension_aytbc, 2 * ady, extension_incircle_16), extension_incircle_16,
            scale(scale(4, extension_bb, adytail, extension_incircle_8), extension_incircle_8, cdx, extension_16b), extension_16b,
            scale(scale(4, extension_cc, adytail, extension_incircle_8), extension_incircle_8, -bdx, extension_16c), extension_16c, extension_32, extension_48), extension_48);
    }
    if (bdxtail !== 0) {
        bxtcalen = scale(4, extension_incircle_ca, bdxtail, extension_bxtca);
        finlen = extension_incircle_finadd(finlen, sum_three(
            scale(bxtcalen, extension_bxtca, 2 * bdx, extension_incircle_16), extension_incircle_16,
            scale(scale(4, extension_aa, bdxtail, extension_incircle_8), extension_incircle_8, cdy, extension_16b), extension_16b,
            scale(scale(4, extension_cc, bdxtail, extension_incircle_8), extension_incircle_8, -ady, extension_16c), extension_16c, extension_32, extension_48), extension_48);
    }
    if (bdytail !== 0) {
        bytcalen = scale(4, extension_incircle_ca, bdytail, extension_bytca);
        finlen = extension_incircle_finadd(finlen, sum_three(
            scale(bytcalen, extension_bytca, 2 * bdy, extension_incircle_16), extension_incircle_16,
            scale(scale(4, extension_cc, bdytail, extension_incircle_8), extension_incircle_8, adx, extension_16b), extension_16b,
            scale(scale(4, extension_aa, bdytail, extension_incircle_8), extension_incircle_8, -cdx, extension_16c), extension_16c, extension_32, extension_48), extension_48);
    }
    if (cdxtail !== 0) {
        cxtablen = scale(4, extension_incircle_ab, cdxtail, extension_cxtab);
        finlen = extension_incircle_finadd(finlen, sum_three(
            scale(cxtablen, extension_cxtab, 2 * cdx, extension_incircle_16), extension_incircle_16,
            scale(scale(4, extension_bb, cdxtail, extension_incircle_8), extension_incircle_8, ady, extension_16b), extension_16b,
            scale(scale(4, extension_aa, cdxtail, extension_incircle_8), extension_incircle_8, -bdy, extension_16c), extension_16c, extension_32, extension_48), extension_48);
    }
    if (cdytail !== 0) {
        cytablen = scale(4, extension_incircle_ab, cdytail, extension_cytab);
        finlen = extension_incircle_finadd(finlen, sum_three(
            scale(cytablen, extension_cytab, 2 * cdy, extension_incircle_16), extension_incircle_16,
            scale(scale(4, extension_aa, cdytail, extension_incircle_8), extension_incircle_8, bdx, extension_16b), extension_16b,
            scale(scale(4, extension_bb, cdytail, extension_incircle_8), extension_incircle_8, -adx, extension_16c), extension_16c, extension_32, extension_48), extension_48);
    }

    if (adxtail !== 0 || adytail !== 0) {
        if (bdxtail !== 0 || bdytail !== 0 || cdxtail !== 0 || cdytail !== 0) {
            s1 = bdxtail * cdy;
            c = splitter * bdxtail;
            ahi = c - (c - bdxtail);
            alo = bdxtail - ahi;
            c = splitter * cdy;
            bhi = c - (c - cdy);
            blo = cdy - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = bdx * cdytail;
            c = splitter * bdx;
            ahi = c - (c - bdx);
            alo = bdx - ahi;
            c = splitter * cdytail;
            bhi = c - (c - cdytail);
            blo = cdytail - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 + t0;
            bvirt = _i - s0;
            extension_incircle_u[0] = s0 - (_i - bvirt) + (t0 - bvirt);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 + t1;
            bvirt = _i - _0;
            extension_incircle_u[1] = _0 - (_i - bvirt) + (t1 - bvirt);
            u3 = _j + _i;
            bvirt = u3 - _j;
            extension_incircle_u[2] = _j - (u3 - bvirt) + (_i - bvirt);
            extension_incircle_u[3] = u3;
            s1 = cdxtail * -bdy;
            c = splitter * cdxtail;
            ahi = c - (c - cdxtail);
            alo = cdxtail - ahi;
            c = splitter * -bdy;
            bhi = c - (c - -bdy);
            blo = -bdy - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = cdx * -bdytail;
            c = splitter * cdx;
            ahi = c - (c - cdx);
            alo = cdx - ahi;
            c = splitter * -bdytail;
            bhi = c - (c - -bdytail);
            blo = -bdytail - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 + t0;
            bvirt = _i - s0;
            extension_v[0] = s0 - (_i - bvirt) + (t0 - bvirt);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 + t1;
            bvirt = _i - _0;
            extension_v[1] = _0 - (_i - bvirt) + (t1 - bvirt);
            u3 = _j + _i;
            bvirt = u3 - _j;
            extension_v[2] = _j - (u3 - bvirt) + (_i - bvirt);
            extension_v[3] = u3;
            bctlen = sum(4, extension_incircle_u, 4, extension_v, extension_incircle_bct);
            s1 = bdxtail * cdytail;
            c = splitter * bdxtail;
            ahi = c - (c - bdxtail);
            alo = bdxtail - ahi;
            c = splitter * cdytail;
            bhi = c - (c - cdytail);
            blo = cdytail - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = cdxtail * bdytail;
            c = splitter * cdxtail;
            ahi = c - (c - cdxtail);
            alo = cdxtail - ahi;
            c = splitter * bdytail;
            bhi = c - (c - bdytail);
            blo = bdytail - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 - t0;
            bvirt = s0 - _i;
            extension_bctt[0] = s0 - (_i + bvirt) + (bvirt - t0);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 - t1;
            bvirt = _0 - _i;
            extension_bctt[1] = _0 - (_i + bvirt) + (bvirt - t1);
            u3 = _j + _i;
            bvirt = u3 - _j;
            extension_bctt[2] = _j - (u3 - bvirt) + (_i - bvirt);
            extension_bctt[3] = u3;
            bcttlen = 4;
        } else {
            extension_incircle_bct[0] = 0;
            bctlen = 1;
            extension_bctt[0] = 0;
            bcttlen = 1;
        }
        if (adxtail !== 0) {
            const len = scale(bctlen, extension_incircle_bct, adxtail, extension_16c);
            finlen = extension_incircle_finadd(finlen, sum(
                scale(axtbclen, extension_axtbc, adxtail, extension_incircle_16), extension_incircle_16,
                scale(len, extension_16c, 2 * adx, extension_32), extension_32, extension_48), extension_48);

            const len2 = scale(bcttlen, extension_bctt, adxtail, extension_incircle_8);
            finlen = extension_incircle_finadd(finlen, sum_three(
                scale(len2, extension_incircle_8, 2 * adx, extension_incircle_16), extension_incircle_16,
                scale(len2, extension_incircle_8, adxtail, extension_16b), extension_16b,
                scale(len, extension_16c, adxtail, extension_32), extension_32, extension_32b, extension_64), extension_64);

            if (bdytail !== 0) {
                finlen = extension_incircle_finadd(finlen, scale(scale(4, extension_cc, adxtail, extension_incircle_8), extension_incircle_8, bdytail, extension_incircle_16), extension_incircle_16);
            }
            if (cdytail !== 0) {
                finlen = extension_incircle_finadd(finlen, scale(scale(4, extension_bb, -adxtail, extension_incircle_8), extension_incircle_8, cdytail, extension_incircle_16), extension_incircle_16);
            }
        }
        if (adytail !== 0) {
            const len = scale(bctlen, extension_incircle_bct, adytail, extension_16c);
            finlen = extension_incircle_finadd(finlen, sum(
                scale(aytbclen, extension_aytbc, adytail, extension_incircle_16), extension_incircle_16,
                scale(len, extension_16c, 2 * ady, extension_32), extension_32, extension_48), extension_48);

            const len2 = scale(bcttlen, extension_bctt, adytail, extension_incircle_8);
            finlen = extension_incircle_finadd(finlen, sum_three(
                scale(len2, extension_incircle_8, 2 * ady, extension_incircle_16), extension_incircle_16,
                scale(len2, extension_incircle_8, adytail, extension_16b), extension_16b,
                scale(len, extension_16c, adytail, extension_32), extension_32, extension_32b, extension_64), extension_64);
        }
    }
    if (bdxtail !== 0 || bdytail !== 0) {
        if (cdxtail !== 0 || cdytail !== 0 || adxtail !== 0 || adytail !== 0) {
            s1 = cdxtail * ady;
            c = splitter * cdxtail;
            ahi = c - (c - cdxtail);
            alo = cdxtail - ahi;
            c = splitter * ady;
            bhi = c - (c - ady);
            blo = ady - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = cdx * adytail;
            c = splitter * cdx;
            ahi = c - (c - cdx);
            alo = cdx - ahi;
            c = splitter * adytail;
            bhi = c - (c - adytail);
            blo = adytail - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 + t0;
            bvirt = _i - s0;
            extension_incircle_u[0] = s0 - (_i - bvirt) + (t0 - bvirt);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 + t1;
            bvirt = _i - _0;
            extension_incircle_u[1] = _0 - (_i - bvirt) + (t1 - bvirt);
            u3 = _j + _i;
            bvirt = u3 - _j;
            extension_incircle_u[2] = _j - (u3 - bvirt) + (_i - bvirt);
            extension_incircle_u[3] = u3;
            n1 = -cdy;
            n0 = -cdytail;
            s1 = adxtail * n1;
            c = splitter * adxtail;
            ahi = c - (c - adxtail);
            alo = adxtail - ahi;
            c = splitter * n1;
            bhi = c - (c - n1);
            blo = n1 - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = adx * n0;
            c = splitter * adx;
            ahi = c - (c - adx);
            alo = adx - ahi;
            c = splitter * n0;
            bhi = c - (c - n0);
            blo = n0 - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 + t0;
            bvirt = _i - s0;
            extension_v[0] = s0 - (_i - bvirt) + (t0 - bvirt);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 + t1;
            bvirt = _i - _0;
            extension_v[1] = _0 - (_i - bvirt) + (t1 - bvirt);
            u3 = _j + _i;
            bvirt = u3 - _j;
            extension_v[2] = _j - (u3 - bvirt) + (_i - bvirt);
            extension_v[3] = u3;
            catlen = sum(4, extension_incircle_u, 4, extension_v, extension_incircle_cat);
            s1 = cdxtail * adytail;
            c = splitter * cdxtail;
            ahi = c - (c - cdxtail);
            alo = cdxtail - ahi;
            c = splitter * adytail;
            bhi = c - (c - adytail);
            blo = adytail - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = adxtail * cdytail;
            c = splitter * adxtail;
            ahi = c - (c - adxtail);
            alo = adxtail - ahi;
            c = splitter * cdytail;
            bhi = c - (c - cdytail);
            blo = cdytail - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 - t0;
            bvirt = s0 - _i;
            extension_catt[0] = s0 - (_i + bvirt) + (bvirt - t0);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 - t1;
            bvirt = _0 - _i;
            extension_catt[1] = _0 - (_i + bvirt) + (bvirt - t1);
            u3 = _j + _i;
            bvirt = u3 - _j;
            extension_catt[2] = _j - (u3 - bvirt) + (_i - bvirt);
            extension_catt[3] = u3;
            cattlen = 4;
        } else {
            extension_incircle_cat[0] = 0;
            catlen = 1;
            extension_catt[0] = 0;
            cattlen = 1;
        }
        if (bdxtail !== 0) {
            const len = scale(catlen, extension_incircle_cat, bdxtail, extension_16c);
            finlen = extension_incircle_finadd(finlen, sum(
                scale(bxtcalen, extension_bxtca, bdxtail, extension_incircle_16), extension_incircle_16,
                scale(len, extension_16c, 2 * bdx, extension_32), extension_32, extension_48), extension_48);

            const len2 = scale(cattlen, extension_catt, bdxtail, extension_incircle_8);
            finlen = extension_incircle_finadd(finlen, sum_three(
                scale(len2, extension_incircle_8, 2 * bdx, extension_incircle_16), extension_incircle_16,
                scale(len2, extension_incircle_8, bdxtail, extension_16b), extension_16b,
                scale(len, extension_16c, bdxtail, extension_32), extension_32, extension_32b, extension_64), extension_64);

            if (cdytail !== 0) {
                finlen = extension_incircle_finadd(finlen, scale(scale(4, extension_aa, bdxtail, extension_incircle_8), extension_incircle_8, cdytail, extension_incircle_16), extension_incircle_16);
            }
            if (adytail !== 0) {
                finlen = extension_incircle_finadd(finlen, scale(scale(4, extension_cc, -bdxtail, extension_incircle_8), extension_incircle_8, adytail, extension_incircle_16), extension_incircle_16);
            }
        }
        if (bdytail !== 0) {
            const len = scale(catlen, extension_incircle_cat, bdytail, extension_16c);
            finlen = extension_incircle_finadd(finlen, sum(
                scale(bytcalen, extension_bytca, bdytail, extension_incircle_16), extension_incircle_16,
                scale(len, extension_16c, 2 * bdy, extension_32), extension_32, extension_48), extension_48);

            const len2 = scale(cattlen, extension_catt, bdytail, extension_incircle_8);
            finlen = extension_incircle_finadd(finlen, sum_three(
                scale(len2, extension_incircle_8, 2 * bdy, extension_incircle_16), extension_incircle_16,
                scale(len2, extension_incircle_8, bdytail, extension_16b), extension_16b,
                scale(len, extension_16c, bdytail, extension_32), extension_32,  extension_32b, extension_64), extension_64);
        }
    }
    if (cdxtail !== 0 || cdytail !== 0) {
        if (adxtail !== 0 || adytail !== 0 || bdxtail !== 0 || bdytail !== 0) {
            s1 = adxtail * bdy;
            c = splitter * adxtail;
            ahi = c - (c - adxtail);
            alo = adxtail - ahi;
            c = splitter * bdy;
            bhi = c - (c - bdy);
            blo = bdy - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = adx * bdytail;
            c = splitter * adx;
            ahi = c - (c - adx);
            alo = adx - ahi;
            c = splitter * bdytail;
            bhi = c - (c - bdytail);
            blo = bdytail - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 + t0;
            bvirt = _i - s0;
            extension_incircle_u[0] = s0 - (_i - bvirt) + (t0 - bvirt);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 + t1;
            bvirt = _i - _0;
            extension_incircle_u[1] = _0 - (_i - bvirt) + (t1 - bvirt);
            u3 = _j + _i;
            bvirt = u3 - _j;
            extension_incircle_u[2] = _j - (u3 - bvirt) + (_i - bvirt);
            extension_incircle_u[3] = u3;
            n1 = -ady;
            n0 = -adytail;
            s1 = bdxtail * n1;
            c = splitter * bdxtail;
            ahi = c - (c - bdxtail);
            alo = bdxtail - ahi;
            c = splitter * n1;
            bhi = c - (c - n1);
            blo = n1 - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = bdx * n0;
            c = splitter * bdx;
            ahi = c - (c - bdx);
            alo = bdx - ahi;
            c = splitter * n0;
            bhi = c - (c - n0);
            blo = n0 - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 + t0;
            bvirt = _i - s0;
            extension_v[0] = s0 - (_i - bvirt) + (t0 - bvirt);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 + t1;
            bvirt = _i - _0;
            extension_v[1] = _0 - (_i - bvirt) + (t1 - bvirt);
            u3 = _j + _i;
            bvirt = u3 - _j;
            extension_v[2] = _j - (u3 - bvirt) + (_i - bvirt);
            extension_v[3] = u3;
            abtlen = sum(4, extension_incircle_u, 4, extension_v, extension_incircle_abt);
            s1 = adxtail * bdytail;
            c = splitter * adxtail;
            ahi = c - (c - adxtail);
            alo = adxtail - ahi;
            c = splitter * bdytail;
            bhi = c - (c - bdytail);
            blo = bdytail - bhi;
            s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
            t1 = bdxtail * adytail;
            c = splitter * bdxtail;
            ahi = c - (c - bdxtail);
            alo = bdxtail - ahi;
            c = splitter * adytail;
            bhi = c - (c - adytail);
            blo = adytail - bhi;
            t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
            _i = s0 - t0;
            bvirt = s0 - _i;
            extension_abtt[0] = s0 - (_i + bvirt) + (bvirt - t0);
            _j = s1 + _i;
            bvirt = _j - s1;
            _0 = s1 - (_j - bvirt) + (_i - bvirt);
            _i = _0 - t1;
            bvirt = _0 - _i;
            extension_abtt[1] = _0 - (_i + bvirt) + (bvirt - t1);
            u3 = _j + _i;
            bvirt = u3 - _j;
            extension_abtt[2] = _j - (u3 - bvirt) + (_i - bvirt);
            extension_abtt[3] = u3;
            abttlen = 4;
        } else {
            extension_incircle_abt[0] = 0;
            abtlen = 1;
            extension_abtt[0] = 0;
            abttlen = 1;
        }
        if (cdxtail !== 0) {
            const len = scale(abtlen, extension_incircle_abt, cdxtail, extension_16c);
            finlen = extension_incircle_finadd(finlen, sum(
                scale(cxtablen, extension_cxtab, cdxtail, extension_incircle_16), extension_incircle_16,
                scale(len, extension_16c, 2 * cdx, extension_32), extension_32, extension_48), extension_48);

            const len2 = scale(abttlen, extension_abtt, cdxtail, extension_incircle_8);
            finlen = extension_incircle_finadd(finlen, sum_three(
                scale(len2, extension_incircle_8, 2 * cdx, extension_incircle_16), extension_incircle_16,
                scale(len2, extension_incircle_8, cdxtail, extension_16b), extension_16b,
                scale(len, extension_16c, cdxtail, extension_32), extension_32, extension_32b, extension_64), extension_64);

            if (adytail !== 0) {
                finlen = extension_incircle_finadd(finlen, scale(scale(4, extension_bb, cdxtail, extension_incircle_8), extension_incircle_8, adytail, extension_incircle_16), extension_incircle_16);
            }
            if (bdytail !== 0) {
                finlen = extension_incircle_finadd(finlen, scale(scale(4, extension_aa, -cdxtail, extension_incircle_8), extension_incircle_8, bdytail, extension_incircle_16), extension_incircle_16);
            }
        }
        if (cdytail !== 0) {
            const len = scale(abtlen, extension_incircle_abt, cdytail, extension_16c);
            finlen = extension_incircle_finadd(finlen, sum(
                scale(cytablen, extension_cytab, cdytail, extension_incircle_16), extension_incircle_16,
                scale(len, extension_16c, 2 * cdy, extension_32), extension_32, extension_48), extension_48);

            const len2 = scale(abttlen, extension_abtt, cdytail, extension_incircle_8);
            finlen = extension_incircle_finadd(finlen, sum_three(
                scale(len2, extension_incircle_8, 2 * cdy, extension_incircle_16), extension_incircle_16,
                scale(len2, extension_incircle_8, cdytail, extension_16b), extension_16b,
                scale(len, extension_16c, cdytail, extension_32), extension_32, extension_32b, extension_64), extension_64);
        }
    }

    return extension_incircle_fin[finlen - 1];
}

function extension_incircle(ax, ay, bx, by, cx, cy, dx, dy) {
    const adx = ax - dx;
    const bdx = bx - dx;
    const cdx = cx - dx;
    const ady = ay - dy;
    const bdy = by - dy;
    const cdy = cy - dy;

    const bdxcdy = bdx * cdy;
    const cdxbdy = cdx * bdy;
    const alift = adx * adx + ady * ady;

    const cdxady = cdx * ady;
    const adxcdy = adx * cdy;
    const blift = bdx * bdx + bdy * bdy;

    const adxbdy = adx * bdy;
    const bdxady = bdx * ady;
    const clift = cdx * cdx + cdy * cdy;

    const det =
        alift * (bdxcdy - cdxbdy) +
        blift * (cdxady - adxcdy) +
        clift * (adxbdy - bdxady);

    const permanent =
        (Math.abs(bdxcdy) + Math.abs(cdxbdy)) * alift +
        (Math.abs(cdxady) + Math.abs(adxcdy)) * blift +
        (Math.abs(adxbdy) + Math.abs(bdxady)) * clift;

    const errbound = extension_iccerrboundA * permanent;

    if (det > errbound || -det > errbound) {
        return det;
    }
    return extension_incircleadapt(ax, ay, bx, by, cx, cy, dx, dy, permanent);
}

function extension_incirclefast(ax, ay, bx, by, cx, cy, dx, dy) {
    const adx = ax - dx;
    const ady = ay - dy;
    const bdx = bx - dx;
    const bdy = by - dy;
    const cdx = cx - dx;
    const cdy = cy - dy;

    const abdet = adx * bdy - bdx * ady;
    const bcdet = bdx * cdy - cdx * bdy;
    const cadet = cdx * ady - adx * cdy;
    const alift = adx * adx + ady * ady;
    const blift = bdx * bdx + bdy * bdy;
    const clift = cdx * cdx + cdy * cdy;

    return alift * bcdet + blift * cadet + clift * abdet;
}

;// ../../node_modules/robust-predicates/esm/insphere.js


const extension_isperrboundA = (16 + 224 * extension_util_epsilon) * extension_util_epsilon;
const extension_isperrboundB = (5 + 72 * extension_util_epsilon) * extension_util_epsilon;
const extension_isperrboundC = (71 + 1408 * extension_util_epsilon) * extension_util_epsilon * extension_util_epsilon;

const extension_insphere_ab = extension_vec(4);
const extension_insphere_bc = extension_vec(4);
const extension_cd = extension_vec(4);
const extension_de = extension_vec(4);
const extension_insphere_ea = extension_vec(4);
const extension_ac = extension_vec(4);
const extension_bd = extension_vec(4);
const extension_ce = extension_vec(4);
const extension_da = extension_vec(4);
const extension_eb = extension_vec(4);

const extension_abc = extension_vec(24);
const extension_bcd = extension_vec(24);
const extension_cde = extension_vec(24);
const extension_dea = extension_vec(24);
const extension_eab = extension_vec(24);
const extension_abd = extension_vec(24);
const extension_bce = extension_vec(24);
const extension_cda = extension_vec(24);
const extension_deb = extension_vec(24);
const extension_eac = extension_vec(24);

const extension_adet = extension_vec(1152);
const extension_bdet = extension_vec(1152);
const extension_cdet = extension_vec(1152);
const extension_ddet = extension_vec(1152);
const extension_edet = extension_vec(1152);
const extension_abdet = extension_vec(2304);
const extension_cddet = extension_vec(2304);
const extension_cdedet = extension_vec(3456);
const extension_deter = extension_vec(5760);

const extension_insphere_8 = extension_vec(8);
const extension_insphere_8b = extension_vec(8);
const extension_8c = extension_vec(8);
const extension_insphere_16 = extension_vec(16);
const extension_24 = extension_vec(24);
const extension_insphere_48 = extension_vec(48);
const extension_48b = extension_vec(48);
const extension_96 = extension_vec(96);
const extension_192 = extension_vec(192);
const extension_384x = extension_vec(384);
const extension_384y = extension_vec(384);
const extension_384z = extension_vec(384);
const extension_768 = extension_vec(768);

function extension_sum_three_scale(a, b, c, az, bz, cz, out) {
    return sum_three(
        scale(4, a, az, extension_insphere_8), extension_insphere_8,
        scale(4, b, bz, extension_insphere_8b), extension_insphere_8b,
        scale(4, c, cz, extension_8c), extension_8c, extension_insphere_16, out);
}

function extension_liftexact(alen, a, blen, b, clen, c, dlen, d, x, y, z, out) {
    const len = sum(
        sum(alen, a, blen, b, extension_insphere_48), extension_insphere_48,
        negate(sum(clen, c, dlen, d, extension_48b), extension_48b), extension_48b, extension_96);

    return sum_three(
        scale(scale(len, extension_96, x, extension_192), extension_192, x, extension_384x), extension_384x,
        scale(scale(len, extension_96, y, extension_192), extension_192, y, extension_384y), extension_384y,
        scale(scale(len, extension_96, z, extension_192), extension_192, z, extension_384z), extension_384z, extension_768, out);
}

function extension_insphereexact(ax, ay, az, bx, by, bz, cx, cy, cz, dx, dy, dz, ex, ey, ez) {
    let bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;

    s1 = ax * by;
    c = splitter * ax;
    ahi = c - (c - ax);
    alo = ax - ahi;
    c = splitter * by;
    bhi = c - (c - by);
    blo = by - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = bx * ay;
    c = splitter * bx;
    ahi = c - (c - bx);
    alo = bx - ahi;
    c = splitter * ay;
    bhi = c - (c - ay);
    blo = ay - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_insphere_ab[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_insphere_ab[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_insphere_ab[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_insphere_ab[3] = u3;
    s1 = bx * cy;
    c = splitter * bx;
    ahi = c - (c - bx);
    alo = bx - ahi;
    c = splitter * cy;
    bhi = c - (c - cy);
    blo = cy - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = cx * by;
    c = splitter * cx;
    ahi = c - (c - cx);
    alo = cx - ahi;
    c = splitter * by;
    bhi = c - (c - by);
    blo = by - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_insphere_bc[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_insphere_bc[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_insphere_bc[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_insphere_bc[3] = u3;
    s1 = cx * dy;
    c = splitter * cx;
    ahi = c - (c - cx);
    alo = cx - ahi;
    c = splitter * dy;
    bhi = c - (c - dy);
    blo = dy - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = dx * cy;
    c = splitter * dx;
    ahi = c - (c - dx);
    alo = dx - ahi;
    c = splitter * cy;
    bhi = c - (c - cy);
    blo = cy - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_cd[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_cd[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_cd[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_cd[3] = u3;
    s1 = dx * ey;
    c = splitter * dx;
    ahi = c - (c - dx);
    alo = dx - ahi;
    c = splitter * ey;
    bhi = c - (c - ey);
    blo = ey - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = ex * dy;
    c = splitter * ex;
    ahi = c - (c - ex);
    alo = ex - ahi;
    c = splitter * dy;
    bhi = c - (c - dy);
    blo = dy - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_de[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_de[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_de[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_de[3] = u3;
    s1 = ex * ay;
    c = splitter * ex;
    ahi = c - (c - ex);
    alo = ex - ahi;
    c = splitter * ay;
    bhi = c - (c - ay);
    blo = ay - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = ax * ey;
    c = splitter * ax;
    ahi = c - (c - ax);
    alo = ax - ahi;
    c = splitter * ey;
    bhi = c - (c - ey);
    blo = ey - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_insphere_ea[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_insphere_ea[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_insphere_ea[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_insphere_ea[3] = u3;
    s1 = ax * cy;
    c = splitter * ax;
    ahi = c - (c - ax);
    alo = ax - ahi;
    c = splitter * cy;
    bhi = c - (c - cy);
    blo = cy - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = cx * ay;
    c = splitter * cx;
    ahi = c - (c - cx);
    alo = cx - ahi;
    c = splitter * ay;
    bhi = c - (c - ay);
    blo = ay - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_ac[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_ac[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_ac[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_ac[3] = u3;
    s1 = bx * dy;
    c = splitter * bx;
    ahi = c - (c - bx);
    alo = bx - ahi;
    c = splitter * dy;
    bhi = c - (c - dy);
    blo = dy - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = dx * by;
    c = splitter * dx;
    ahi = c - (c - dx);
    alo = dx - ahi;
    c = splitter * by;
    bhi = c - (c - by);
    blo = by - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_bd[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_bd[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_bd[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_bd[3] = u3;
    s1 = cx * ey;
    c = splitter * cx;
    ahi = c - (c - cx);
    alo = cx - ahi;
    c = splitter * ey;
    bhi = c - (c - ey);
    blo = ey - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = ex * cy;
    c = splitter * ex;
    ahi = c - (c - ex);
    alo = ex - ahi;
    c = splitter * cy;
    bhi = c - (c - cy);
    blo = cy - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_ce[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_ce[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_ce[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_ce[3] = u3;
    s1 = dx * ay;
    c = splitter * dx;
    ahi = c - (c - dx);
    alo = dx - ahi;
    c = splitter * ay;
    bhi = c - (c - ay);
    blo = ay - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = ax * dy;
    c = splitter * ax;
    ahi = c - (c - ax);
    alo = ax - ahi;
    c = splitter * dy;
    bhi = c - (c - dy);
    blo = dy - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_da[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_da[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_da[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_da[3] = u3;
    s1 = ex * by;
    c = splitter * ex;
    ahi = c - (c - ex);
    alo = ex - ahi;
    c = splitter * by;
    bhi = c - (c - by);
    blo = by - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = bx * ey;
    c = splitter * bx;
    ahi = c - (c - bx);
    alo = bx - ahi;
    c = splitter * ey;
    bhi = c - (c - ey);
    blo = ey - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_eb[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_eb[1] = _0 - (_i + bvirt) + (bvirt - t1);
    u3 = _j + _i;
    bvirt = u3 - _j;
    extension_eb[2] = _j - (u3 - bvirt) + (_i - bvirt);
    extension_eb[3] = u3;

    const abclen = extension_sum_three_scale(extension_insphere_ab, extension_insphere_bc, extension_ac, cz, az, -bz, extension_abc);
    const bcdlen = extension_sum_three_scale(extension_insphere_bc, extension_cd, extension_bd, dz, bz, -cz, extension_bcd);
    const cdelen = extension_sum_three_scale(extension_cd, extension_de, extension_ce, ez, cz, -dz, extension_cde);
    const dealen = extension_sum_three_scale(extension_de, extension_insphere_ea, extension_da, az, dz, -ez, extension_dea);
    const eablen = extension_sum_three_scale(extension_insphere_ea, extension_insphere_ab, extension_eb, bz, ez, -az, extension_eab);
    const abdlen = extension_sum_three_scale(extension_insphere_ab, extension_bd, extension_da, dz, az, bz, extension_abd);
    const bcelen = extension_sum_three_scale(extension_insphere_bc, extension_ce, extension_eb, ez, bz, cz, extension_bce);
    const cdalen = extension_sum_three_scale(extension_cd, extension_da, extension_ac, az, cz, dz, extension_cda);
    const deblen = extension_sum_three_scale(extension_de, extension_eb, extension_bd, bz, dz, ez, extension_deb);
    const eaclen = extension_sum_three_scale(extension_insphere_ea, extension_ac, extension_ce, cz, ez, az, extension_eac);

    const deterlen = sum_three(
        extension_liftexact(cdelen, extension_cde, bcelen, extension_bce, deblen, extension_deb, bcdlen, extension_bcd, ax, ay, az, extension_adet), extension_adet,
        extension_liftexact(dealen, extension_dea, cdalen, extension_cda, eaclen, extension_eac, cdelen, extension_cde, bx, by, bz, extension_bdet), extension_bdet,
        sum_three(
            extension_liftexact(eablen, extension_eab, deblen, extension_deb, abdlen, extension_abd, dealen, extension_dea, cx, cy, cz, extension_cdet), extension_cdet,
            extension_liftexact(abclen, extension_abc, eaclen, extension_eac, bcelen, extension_bce, eablen, extension_eab, dx, dy, dz, extension_ddet), extension_ddet,
            extension_liftexact(bcdlen, extension_bcd, abdlen, extension_abd, cdalen, extension_cda, abclen, extension_abc, ex, ey, ez, extension_edet), extension_edet, extension_cddet, extension_cdedet), extension_cdedet, extension_abdet, extension_deter);

    return extension_deter[deterlen - 1];
}

const extension_xdet = extension_vec(96);
const extension_ydet = extension_vec(96);
const extension_zdet = extension_vec(96);
const extension_insphere_fin = extension_vec(1152);

function extension_liftadapt(a, b, c, az, bz, cz, x, y, z, out) {
    const len = extension_sum_three_scale(a, b, c, az, bz, cz, extension_24);
    return sum_three(
        scale(scale(len, extension_24, x, extension_insphere_48), extension_insphere_48, x, extension_xdet), extension_xdet,
        scale(scale(len, extension_24, y, extension_insphere_48), extension_insphere_48, y, extension_ydet), extension_ydet,
        scale(scale(len, extension_24, z, extension_insphere_48), extension_insphere_48, z, extension_zdet), extension_zdet, extension_192, out);
}

function extension_insphereadapt(ax, ay, az, bx, by, bz, cx, cy, cz, dx, dy, dz, ex, ey, ez, permanent) {
    let ab3, bc3, cd3, da3, ac3, bd3;

    let aextail, bextail, cextail, dextail;
    let aeytail, beytail, ceytail, deytail;
    let aeztail, beztail, ceztail, deztail;

    let bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0;

    const aex = ax - ex;
    const bex = bx - ex;
    const cex = cx - ex;
    const dex = dx - ex;
    const aey = ay - ey;
    const bey = by - ey;
    const cey = cy - ey;
    const dey = dy - ey;
    const aez = az - ez;
    const bez = bz - ez;
    const cez = cz - ez;
    const dez = dz - ez;

    s1 = aex * bey;
    c = splitter * aex;
    ahi = c - (c - aex);
    alo = aex - ahi;
    c = splitter * bey;
    bhi = c - (c - bey);
    blo = bey - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = bex * aey;
    c = splitter * bex;
    ahi = c - (c - bex);
    alo = bex - ahi;
    c = splitter * aey;
    bhi = c - (c - aey);
    blo = aey - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_insphere_ab[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_insphere_ab[1] = _0 - (_i + bvirt) + (bvirt - t1);
    ab3 = _j + _i;
    bvirt = ab3 - _j;
    extension_insphere_ab[2] = _j - (ab3 - bvirt) + (_i - bvirt);
    extension_insphere_ab[3] = ab3;
    s1 = bex * cey;
    c = splitter * bex;
    ahi = c - (c - bex);
    alo = bex - ahi;
    c = splitter * cey;
    bhi = c - (c - cey);
    blo = cey - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = cex * bey;
    c = splitter * cex;
    ahi = c - (c - cex);
    alo = cex - ahi;
    c = splitter * bey;
    bhi = c - (c - bey);
    blo = bey - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_insphere_bc[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_insphere_bc[1] = _0 - (_i + bvirt) + (bvirt - t1);
    bc3 = _j + _i;
    bvirt = bc3 - _j;
    extension_insphere_bc[2] = _j - (bc3 - bvirt) + (_i - bvirt);
    extension_insphere_bc[3] = bc3;
    s1 = cex * dey;
    c = splitter * cex;
    ahi = c - (c - cex);
    alo = cex - ahi;
    c = splitter * dey;
    bhi = c - (c - dey);
    blo = dey - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = dex * cey;
    c = splitter * dex;
    ahi = c - (c - dex);
    alo = dex - ahi;
    c = splitter * cey;
    bhi = c - (c - cey);
    blo = cey - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_cd[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_cd[1] = _0 - (_i + bvirt) + (bvirt - t1);
    cd3 = _j + _i;
    bvirt = cd3 - _j;
    extension_cd[2] = _j - (cd3 - bvirt) + (_i - bvirt);
    extension_cd[3] = cd3;
    s1 = dex * aey;
    c = splitter * dex;
    ahi = c - (c - dex);
    alo = dex - ahi;
    c = splitter * aey;
    bhi = c - (c - aey);
    blo = aey - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = aex * dey;
    c = splitter * aex;
    ahi = c - (c - aex);
    alo = aex - ahi;
    c = splitter * dey;
    bhi = c - (c - dey);
    blo = dey - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_da[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_da[1] = _0 - (_i + bvirt) + (bvirt - t1);
    da3 = _j + _i;
    bvirt = da3 - _j;
    extension_da[2] = _j - (da3 - bvirt) + (_i - bvirt);
    extension_da[3] = da3;
    s1 = aex * cey;
    c = splitter * aex;
    ahi = c - (c - aex);
    alo = aex - ahi;
    c = splitter * cey;
    bhi = c - (c - cey);
    blo = cey - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = cex * aey;
    c = splitter * cex;
    ahi = c - (c - cex);
    alo = cex - ahi;
    c = splitter * aey;
    bhi = c - (c - aey);
    blo = aey - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_ac[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_ac[1] = _0 - (_i + bvirt) + (bvirt - t1);
    ac3 = _j + _i;
    bvirt = ac3 - _j;
    extension_ac[2] = _j - (ac3 - bvirt) + (_i - bvirt);
    extension_ac[3] = ac3;
    s1 = bex * dey;
    c = splitter * bex;
    ahi = c - (c - bex);
    alo = bex - ahi;
    c = splitter * dey;
    bhi = c - (c - dey);
    blo = dey - bhi;
    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
    t1 = dex * bey;
    c = splitter * dex;
    ahi = c - (c - dex);
    alo = dex - ahi;
    c = splitter * bey;
    bhi = c - (c - bey);
    blo = bey - bhi;
    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
    _i = s0 - t0;
    bvirt = s0 - _i;
    extension_bd[0] = s0 - (_i + bvirt) + (bvirt - t0);
    _j = s1 + _i;
    bvirt = _j - s1;
    _0 = s1 - (_j - bvirt) + (_i - bvirt);
    _i = _0 - t1;
    bvirt = _0 - _i;
    extension_bd[1] = _0 - (_i + bvirt) + (bvirt - t1);
    bd3 = _j + _i;
    bvirt = bd3 - _j;
    extension_bd[2] = _j - (bd3 - bvirt) + (_i - bvirt);
    extension_bd[3] = bd3;

    const finlen = sum(
        sum(
            negate(extension_liftadapt(extension_insphere_bc, extension_cd, extension_bd, dez, bez, -cez, aex, aey, aez, extension_adet), extension_adet), extension_adet,
            extension_liftadapt(extension_cd, extension_da, extension_ac, aez, cez, dez, bex, bey, bez, extension_bdet), extension_bdet, extension_abdet), extension_abdet,
        sum(
            negate(extension_liftadapt(extension_da, extension_insphere_ab, extension_bd, bez, dez, aez, cex, cey, cez, extension_cdet), extension_cdet), extension_cdet,
            extension_liftadapt(extension_insphere_ab, extension_insphere_bc, extension_ac, cez, aez, -bez, dex, dey, dez, extension_ddet), extension_ddet, extension_cddet), extension_cddet, extension_insphere_fin);

    let det = estimate(finlen, extension_insphere_fin);
    let errbound = extension_isperrboundB * permanent;
    if (det >= errbound || -det >= errbound) {
        return det;
    }

    bvirt = ax - aex;
    aextail = ax - (aex + bvirt) + (bvirt - ex);
    bvirt = ay - aey;
    aeytail = ay - (aey + bvirt) + (bvirt - ey);
    bvirt = az - aez;
    aeztail = az - (aez + bvirt) + (bvirt - ez);
    bvirt = bx - bex;
    bextail = bx - (bex + bvirt) + (bvirt - ex);
    bvirt = by - bey;
    beytail = by - (bey + bvirt) + (bvirt - ey);
    bvirt = bz - bez;
    beztail = bz - (bez + bvirt) + (bvirt - ez);
    bvirt = cx - cex;
    cextail = cx - (cex + bvirt) + (bvirt - ex);
    bvirt = cy - cey;
    ceytail = cy - (cey + bvirt) + (bvirt - ey);
    bvirt = cz - cez;
    ceztail = cz - (cez + bvirt) + (bvirt - ez);
    bvirt = dx - dex;
    dextail = dx - (dex + bvirt) + (bvirt - ex);
    bvirt = dy - dey;
    deytail = dy - (dey + bvirt) + (bvirt - ey);
    bvirt = dz - dez;
    deztail = dz - (dez + bvirt) + (bvirt - ez);
    if (aextail === 0 && aeytail === 0 && aeztail === 0 &&
        bextail === 0 && beytail === 0 && beztail === 0 &&
        cextail === 0 && ceytail === 0 && ceztail === 0 &&
        dextail === 0 && deytail === 0 && deztail === 0) {
        return det;
    }

    errbound = extension_isperrboundC * permanent + resulterrbound * Math.abs(det);

    const abeps = (aex * beytail + bey * aextail) - (aey * bextail + bex * aeytail);
    const bceps = (bex * ceytail + cey * bextail) - (bey * cextail + cex * beytail);
    const cdeps = (cex * deytail + dey * cextail) - (cey * dextail + dex * ceytail);
    const daeps = (dex * aeytail + aey * dextail) - (dey * aextail + aex * deytail);
    const aceps = (aex * ceytail + cey * aextail) - (aey * cextail + cex * aeytail);
    const bdeps = (bex * deytail + dey * bextail) - (bey * dextail + dex * beytail);
    det +=
        (((bex * bex + bey * bey + bez * bez) * ((cez * daeps + dez * aceps + aez * cdeps) +
        (ceztail * da3 + deztail * ac3 + aeztail * cd3)) + (dex * dex + dey * dey + dez * dez) *
        ((aez * bceps - bez * aceps + cez * abeps) + (aeztail * bc3 - beztail * ac3 + ceztail * ab3))) -
        ((aex * aex + aey * aey + aez * aez) * ((bez * cdeps - cez * bdeps + dez * bceps) +
        (beztail * cd3 - ceztail * bd3 + deztail * bc3)) + (cex * cex + cey * cey + cez * cez) *
        ((dez * abeps + aez * bdeps + bez * daeps) + (deztail * ab3 + aeztail * bd3 + beztail * da3)))) +
        2 * (((bex * bextail + bey * beytail + bez * beztail) * (cez * da3 + dez * ac3 + aez * cd3) +
        (dex * dextail + dey * deytail + dez * deztail) * (aez * bc3 - bez * ac3 + cez * ab3)) -
        ((aex * aextail + aey * aeytail + aez * aeztail) * (bez * cd3 - cez * bd3 + dez * bc3) +
        (cex * cextail + cey * ceytail + cez * ceztail) * (dez * ab3 + aez * bd3 + bez * da3)));

    if (det >= errbound || -det >= errbound) {
        return det;
    }

    return extension_insphereexact(ax, ay, az, bx, by, bz, cx, cy, cz, dx, dy, dz, ex, ey, ez);
}

function extension_insphere(ax, ay, az, bx, by, bz, cx, cy, cz, dx, dy, dz, ex, ey, ez) {
    const aex = ax - ex;
    const bex = bx - ex;
    const cex = cx - ex;
    const dex = dx - ex;
    const aey = ay - ey;
    const bey = by - ey;
    const cey = cy - ey;
    const dey = dy - ey;
    const aez = az - ez;
    const bez = bz - ez;
    const cez = cz - ez;
    const dez = dz - ez;

    const aexbey = aex * bey;
    const bexaey = bex * aey;
    const ab = aexbey - bexaey;
    const bexcey = bex * cey;
    const cexbey = cex * bey;
    const bc = bexcey - cexbey;
    const cexdey = cex * dey;
    const dexcey = dex * cey;
    const cd = cexdey - dexcey;
    const dexaey = dex * aey;
    const aexdey = aex * dey;
    const da = dexaey - aexdey;
    const aexcey = aex * cey;
    const cexaey = cex * aey;
    const ac = aexcey - cexaey;
    const bexdey = bex * dey;
    const dexbey = dex * bey;
    const bd = bexdey - dexbey;

    const alift = aex * aex + aey * aey + aez * aez;
    const blift = bex * bex + bey * bey + bez * bez;
    const clift = cex * cex + cey * cey + cez * cez;
    const dlift = dex * dex + dey * dey + dez * dez;

    const det =
        (clift * (dez * ab + aez * bd + bez * da) - dlift * (aez * bc - bez * ac + cez * ab)) +
        (alift * (bez * cd - cez * bd + dez * bc) - blift * (cez * da + dez * ac + aez * cd));

    const aezplus = Math.abs(aez);
    const bezplus = Math.abs(bez);
    const cezplus = Math.abs(cez);
    const dezplus = Math.abs(dez);
    const aexbeyplus = Math.abs(aexbey) + Math.abs(bexaey);
    const bexceyplus = Math.abs(bexcey) + Math.abs(cexbey);
    const cexdeyplus = Math.abs(cexdey) + Math.abs(dexcey);
    const dexaeyplus = Math.abs(dexaey) + Math.abs(aexdey);
    const aexceyplus = Math.abs(aexcey) + Math.abs(cexaey);
    const bexdeyplus = Math.abs(bexdey) + Math.abs(dexbey);
    const permanent =
        (cexdeyplus * bezplus + bexdeyplus * cezplus + bexceyplus * dezplus) * alift +
        (dexaeyplus * cezplus + aexceyplus * dezplus + cexdeyplus * aezplus) * blift +
        (aexbeyplus * dezplus + bexdeyplus * aezplus + dexaeyplus * bezplus) * clift +
        (bexceyplus * aezplus + aexceyplus * bezplus + aexbeyplus * cezplus) * dlift;

    const errbound = extension_isperrboundA * permanent;
    if (det > errbound || -det > errbound) {
        return det;
    }
    return -extension_insphereadapt(ax, ay, az, bx, by, bz, cx, cy, cz, dx, dy, dz, ex, ey, ez, permanent);
}

function extension_inspherefast(pax, pay, paz, pbx, pby, pbz, pcx, pcy, pcz, pdx, pdy, pdz, pex, pey, pez) {
    const aex = pax - pex;
    const bex = pbx - pex;
    const cex = pcx - pex;
    const dex = pdx - pex;
    const aey = pay - pey;
    const bey = pby - pey;
    const cey = pcy - pey;
    const dey = pdy - pey;
    const aez = paz - pez;
    const bez = pbz - pez;
    const cez = pcz - pez;
    const dez = pdz - pez;

    const ab = aex * bey - bex * aey;
    const bc = bex * cey - cex * bey;
    const cd = cex * dey - dex * cey;
    const da = dex * aey - aex * dey;
    const ac = aex * cey - cex * aey;
    const bd = bex * dey - dex * bey;

    const abc = aez * bc - bez * ac + cez * ab;
    const bcd = bez * cd - cez * bd + dez * bc;
    const cda = cez * da + dez * ac + aez * cd;
    const dab = dez * ab + aez * bd + bez * da;

    const alift = aex * aex + aey * aey + aez * aez;
    const blift = bex * bex + bey * bey + bez * bez;
    const clift = cex * cex + cey * cey + cez * cez;
    const dlift = dex * dex + dey * dey + dez * dez;

    return (clift * dab - dlift * abc) + (alift * bcd - blift * cda);
}

;// ../../node_modules/robust-predicates/index.js






;// ../../node_modules/delaunator/index.js

const extension_delaunator_EPSILON = Math.pow(2, -52);
const extension_EDGE_STACK = new Uint32Array(512);



class extension_Delaunator {

    static from(points, getX = extension_defaultGetX, getY = extension_defaultGetY) {
        const n = points.length;
        const coords = new Float64Array(n * 2);

        for (let i = 0; i < n; i++) {
            const p = points[i];
            coords[2 * i] = getX(p);
            coords[2 * i + 1] = getY(p);
        }

        return new extension_Delaunator(coords);
    }

    constructor(coords) {
        const n = coords.length >> 1;
        if (n > 0 && typeof coords[0] !== 'number') throw new Error('Expected coords to contain numbers.');

        this.coords = coords;

        // arrays that will store the triangulation graph
        const maxTriangles = Math.max(2 * n - 5, 0);
        this._triangles = new Uint32Array(maxTriangles * 3);
        this._halfedges = new Int32Array(maxTriangles * 3);

        // temporary arrays for tracking the edges of the advancing convex hull
        this._hashSize = Math.ceil(Math.sqrt(n));
        this._hullPrev = new Uint32Array(n); // edge to prev edge
        this._hullNext = new Uint32Array(n); // edge to next edge
        this._hullTri = new Uint32Array(n); // edge to adjacent triangle
        this._hullHash = new Int32Array(this._hashSize); // angular edge hash

        // temporary arrays for sorting points
        this._ids = new Uint32Array(n);
        this._dists = new Float64Array(n);

        this.update();
    }

    update() {
        const {coords, _hullPrev: hullPrev, _hullNext: hullNext, _hullTri: hullTri, _hullHash: hullHash} =  this;
        const n = coords.length >> 1;

        // populate an array of point indices; calculate input data bbox
        let minX = Infinity;
        let minY = Infinity;
        let maxX = -Infinity;
        let maxY = -Infinity;

        for (let i = 0; i < n; i++) {
            const x = coords[2 * i];
            const y = coords[2 * i + 1];
            if (x < minX) minX = x;
            if (y < minY) minY = y;
            if (x > maxX) maxX = x;
            if (y > maxY) maxY = y;
            this._ids[i] = i;
        }
        const cx = (minX + maxX) / 2;
        const cy = (minY + maxY) / 2;

        let i0, i1, i2;

        // pick a seed point close to the center
        for (let i = 0, minDist = Infinity; i < n; i++) {
            const d = extension_dist(cx, cy, coords[2 * i], coords[2 * i + 1]);
            if (d < minDist) {
                i0 = i;
                minDist = d;
            }
        }
        const i0x = coords[2 * i0];
        const i0y = coords[2 * i0 + 1];

        // find the point closest to the seed
        for (let i = 0, minDist = Infinity; i < n; i++) {
            if (i === i0) continue;
            const d = extension_dist(i0x, i0y, coords[2 * i], coords[2 * i + 1]);
            if (d < minDist && d > 0) {
                i1 = i;
                minDist = d;
            }
        }
        let i1x = coords[2 * i1];
        let i1y = coords[2 * i1 + 1];

        let minRadius = Infinity;

        // find the third point which forms the smallest circumcircle with the first two
        for (let i = 0; i < n; i++) {
            if (i === i0 || i === i1) continue;
            const r = extension_circumradius(i0x, i0y, i1x, i1y, coords[2 * i], coords[2 * i + 1]);
            if (r < minRadius) {
                i2 = i;
                minRadius = r;
            }
        }
        let i2x = coords[2 * i2];
        let i2y = coords[2 * i2 + 1];

        if (minRadius === Infinity) {
            // order collinear points by dx (or dy if all x are identical)
            // and return the list as a hull
            for (let i = 0; i < n; i++) {
                this._dists[i] = (coords[2 * i] - coords[0]) || (coords[2 * i + 1] - coords[1]);
            }
            extension_quicksort(this._ids, this._dists, 0, n - 1);
            const hull = new Uint32Array(n);
            let j = 0;
            for (let i = 0, d0 = -Infinity; i < n; i++) {
                const id = this._ids[i];
                const d = this._dists[id];
                if (d > d0) {
                    hull[j++] = id;
                    d0 = d;
                }
            }
            this.hull = hull.subarray(0, j);
            this.triangles = new Uint32Array(0);
            this.halfedges = new Uint32Array(0);
            return;
        }

        // swap the order of the seed points for counter-clockwise orientation
        if (extension_orient2d(i0x, i0y, i1x, i1y, i2x, i2y) < 0) {
            const i = i1;
            const x = i1x;
            const y = i1y;
            i1 = i2;
            i1x = i2x;
            i1y = i2y;
            i2 = i;
            i2x = x;
            i2y = y;
        }

        const center = extension_circumcenter(i0x, i0y, i1x, i1y, i2x, i2y);
        this._cx = center.x;
        this._cy = center.y;

        for (let i = 0; i < n; i++) {
            this._dists[i] = extension_dist(coords[2 * i], coords[2 * i + 1], center.x, center.y);
        }

        // sort the points by distance from the seed triangle circumcenter
        extension_quicksort(this._ids, this._dists, 0, n - 1);

        // set up the seed triangle as the starting hull
        this._hullStart = i0;
        let hullSize = 3;

        hullNext[i0] = hullPrev[i2] = i1;
        hullNext[i1] = hullPrev[i0] = i2;
        hullNext[i2] = hullPrev[i1] = i0;

        hullTri[i0] = 0;
        hullTri[i1] = 1;
        hullTri[i2] = 2;

        hullHash.fill(-1);
        hullHash[this._hashKey(i0x, i0y)] = i0;
        hullHash[this._hashKey(i1x, i1y)] = i1;
        hullHash[this._hashKey(i2x, i2y)] = i2;

        this.trianglesLen = 0;
        this._addTriangle(i0, i1, i2, -1, -1, -1);

        for (let k = 0, xp, yp; k < this._ids.length; k++) {
            const i = this._ids[k];
            const x = coords[2 * i];
            const y = coords[2 * i + 1];

            // skip near-duplicate points
            if (k > 0 && Math.abs(x - xp) <= extension_delaunator_EPSILON && Math.abs(y - yp) <= extension_delaunator_EPSILON) continue;
            xp = x;
            yp = y;

            // skip seed triangle points
            if (i === i0 || i === i1 || i === i2) continue;

            // find a visible edge on the convex hull using edge hash
            let start = 0;
            for (let j = 0, key = this._hashKey(x, y); j < this._hashSize; j++) {
                start = hullHash[(key + j) % this._hashSize];
                if (start !== -1 && start !== hullNext[start]) break;
            }

            start = hullPrev[start];
            let e = start, q;
            while (q = hullNext[e], extension_orient2d(x, y, coords[2 * e], coords[2 * e + 1], coords[2 * q], coords[2 * q + 1]) >= 0) {
                e = q;
                if (e === start) {
                    e = -1;
                    break;
                }
            }
            if (e === -1) continue; // likely a near-duplicate point; skip it

            // add the first triangle from the point
            let t = this._addTriangle(e, i, hullNext[e], -1, -1, hullTri[e]);

            // recursively flip triangles from the point until they satisfy the Delaunay condition
            hullTri[i] = this._legalize(t + 2);
            hullTri[e] = t; // keep track of boundary triangles on the hull
            hullSize++;

            // walk forward through the hull, adding more triangles and flipping recursively
            let n = hullNext[e];
            while (q = hullNext[n], extension_orient2d(x, y, coords[2 * n], coords[2 * n + 1], coords[2 * q], coords[2 * q + 1]) < 0) {
                t = this._addTriangle(n, i, q, hullTri[i], -1, hullTri[n]);
                hullTri[i] = this._legalize(t + 2);
                hullNext[n] = n; // mark as removed
                hullSize--;
                n = q;
            }

            // walk backward from the other side, adding more triangles and flipping
            if (e === start) {
                while (q = hullPrev[e], extension_orient2d(x, y, coords[2 * q], coords[2 * q + 1], coords[2 * e], coords[2 * e + 1]) < 0) {
                    t = this._addTriangle(q, i, e, -1, hullTri[e], hullTri[q]);
                    this._legalize(t + 2);
                    hullTri[q] = t;
                    hullNext[e] = e; // mark as removed
                    hullSize--;
                    e = q;
                }
            }

            // update the hull indices
            this._hullStart = hullPrev[i] = e;
            hullNext[e] = hullPrev[n] = i;
            hullNext[i] = n;

            // save the two new edges in the hash table
            hullHash[this._hashKey(x, y)] = i;
            hullHash[this._hashKey(coords[2 * e], coords[2 * e + 1])] = e;
        }

        this.hull = new Uint32Array(hullSize);
        for (let i = 0, e = this._hullStart; i < hullSize; i++) {
            this.hull[i] = e;
            e = hullNext[e];
        }

        // trim typed triangle mesh arrays
        this.triangles = this._triangles.subarray(0, this.trianglesLen);
        this.halfedges = this._halfedges.subarray(0, this.trianglesLen);
    }

    _hashKey(x, y) {
        return Math.floor(extension_pseudoAngle(x - this._cx, y - this._cy) * this._hashSize) % this._hashSize;
    }

    _legalize(a) {
        const {_triangles: triangles, _halfedges: halfedges, coords} = this;

        let i = 0;
        let ar = 0;

        // recursion eliminated with a fixed-size stack
        while (true) {
            const b = halfedges[a];

            /* if the pair of triangles doesn't satisfy the Delaunay condition
             * (p1 is inside the circumcircle of [p0, pl, pr]), flip them,
             * then do the same check/flip recursively for the new pair of triangles
             *
             *           pl                    pl
             *          /||\                  /  \
             *       al/ || \bl            al/    \a
             *        /  ||  \              /      \
             *       /  a||b  \    flip    /___ar___\
             *     p0\   ||   /p1   =>   p0\---bl---/p1
             *        \  ||  /              \      /
             *       ar\ || /br             b\    /br
             *          \||/                  \  /
             *           pr                    pr
             */
            const a0 = a - a % 3;
            ar = a0 + (a + 2) % 3;

            if (b === -1) { // convex hull edge
                if (i === 0) break;
                a = extension_EDGE_STACK[--i];
                continue;
            }

            const b0 = b - b % 3;
            const al = a0 + (a + 1) % 3;
            const bl = b0 + (b + 2) % 3;

            const p0 = triangles[ar];
            const pr = triangles[a];
            const pl = triangles[al];
            const p1 = triangles[bl];

            const illegal = extension_inCircle(
                coords[2 * p0], coords[2 * p0 + 1],
                coords[2 * pr], coords[2 * pr + 1],
                coords[2 * pl], coords[2 * pl + 1],
                coords[2 * p1], coords[2 * p1 + 1]);

            if (illegal) {
                triangles[a] = p1;
                triangles[b] = p0;

                const hbl = halfedges[bl];

                // edge swapped on the other side of the hull (rare); fix the halfedge reference
                if (hbl === -1) {
                    let e = this._hullStart;
                    do {
                        if (this._hullTri[e] === bl) {
                            this._hullTri[e] = a;
                            break;
                        }
                        e = this._hullPrev[e];
                    } while (e !== this._hullStart);
                }
                this._link(a, hbl);
                this._link(b, halfedges[ar]);
                this._link(ar, bl);

                const br = b0 + (b + 1) % 3;

                // don't worry about hitting the cap: it can only happen on extremely degenerate input
                if (i < extension_EDGE_STACK.length) {
                    extension_EDGE_STACK[i++] = br;
                }
            } else {
                if (i === 0) break;
                a = extension_EDGE_STACK[--i];
            }
        }

        return ar;
    }

    _link(a, b) {
        this._halfedges[a] = b;
        if (b !== -1) this._halfedges[b] = a;
    }

    // add a new triangle given vertex indices and adjacent half-edge ids
    _addTriangle(i0, i1, i2, a, b, c) {
        const t = this.trianglesLen;

        this._triangles[t] = i0;
        this._triangles[t + 1] = i1;
        this._triangles[t + 2] = i2;

        this._link(t, a);
        this._link(t + 1, b);
        this._link(t + 2, c);

        this.trianglesLen += 3;

        return t;
    }
}

// monotonically increases with real angle, but doesn't need expensive trigonometry
function extension_pseudoAngle(dx, dy) {
    const p = dx / (Math.abs(dx) + Math.abs(dy));
    return (dy > 0 ? 3 - p : 1 + p) / 4; // [0..1]
}

function extension_dist(ax, ay, bx, by) {
    const dx = ax - bx;
    const dy = ay - by;
    return dx * dx + dy * dy;
}

function extension_inCircle(ax, ay, bx, by, cx, cy, px, py) {
    const dx = ax - px;
    const dy = ay - py;
    const ex = bx - px;
    const ey = by - py;
    const fx = cx - px;
    const fy = cy - py;

    const ap = dx * dx + dy * dy;
    const bp = ex * ex + ey * ey;
    const cp = fx * fx + fy * fy;

    return dx * (ey * cp - bp * fy) -
           dy * (ex * cp - bp * fx) +
           ap * (ex * fy - ey * fx) < 0;
}

function extension_circumradius(ax, ay, bx, by, cx, cy) {
    const dx = bx - ax;
    const dy = by - ay;
    const ex = cx - ax;
    const ey = cy - ay;

    const bl = dx * dx + dy * dy;
    const cl = ex * ex + ey * ey;
    const d = 0.5 / (dx * ey - dy * ex);

    const x = (ey * bl - dy * cl) * d;
    const y = (dx * cl - ex * bl) * d;

    return x * x + y * y;
}

function extension_circumcenter(ax, ay, bx, by, cx, cy) {
    const dx = bx - ax;
    const dy = by - ay;
    const ex = cx - ax;
    const ey = cy - ay;

    const bl = dx * dx + dy * dy;
    const cl = ex * ex + ey * ey;
    const d = 0.5 / (dx * ey - dy * ex);

    const x = ax + (ey * bl - dy * cl) * d;
    const y = ay + (dx * cl - ex * bl) * d;

    return {x, y};
}

function extension_quicksort(ids, dists, left, right) {
    if (right - left <= 20) {
        for (let i = left + 1; i <= right; i++) {
            const temp = ids[i];
            const tempDist = dists[temp];
            let j = i - 1;
            while (j >= left && dists[ids[j]] > tempDist) ids[j + 1] = ids[j--];
            ids[j + 1] = temp;
        }
    } else {
        const median = (left + right) >> 1;
        let i = left + 1;
        let j = right;
        extension_delaunator_swap(ids, median, i);
        if (dists[ids[left]] > dists[ids[right]]) extension_delaunator_swap(ids, left, right);
        if (dists[ids[i]] > dists[ids[right]]) extension_delaunator_swap(ids, i, right);
        if (dists[ids[left]] > dists[ids[i]]) extension_delaunator_swap(ids, left, i);

        const temp = ids[i];
        const tempDist = dists[temp];
        while (true) {
            do i++; while (dists[ids[i]] < tempDist);
            do j--; while (dists[ids[j]] > tempDist);
            if (j < i) break;
            extension_delaunator_swap(ids, i, j);
        }
        ids[left + 1] = ids[j];
        ids[j] = temp;

        if (right - i + 1 >= j - left) {
            extension_quicksort(ids, dists, i, right);
            extension_quicksort(ids, dists, left, j - 1);
        } else {
            extension_quicksort(ids, dists, left, j - 1);
            extension_quicksort(ids, dists, i, right);
        }
    }
}

function extension_delaunator_swap(arr, i, j) {
    const tmp = arr[i];
    arr[i] = arr[j];
    arr[j] = tmp;
}

function extension_defaultGetX(p) {
    return p[0];
}
function extension_defaultGetY(p) {
    return p[1];
}

;// ../../node_modules/d3-delaunay/src/path.js
const extension_src_path_epsilon = 1e-6;

class extension_path_Path {
  constructor() {
    this._x0 = this._y0 = // start of current subpath
    this._x1 = this._y1 = null; // end of current subpath
    this._ = "";
  }
  moveTo(x, y) {
    this._ += `M${this._x0 = this._x1 = +x},${this._y0 = this._y1 = +y}`;
  }
  closePath() {
    if (this._x1 !== null) {
      this._x1 = this._x0, this._y1 = this._y0;
      this._ += "Z";
    }
  }
  lineTo(x, y) {
    this._ += `L${this._x1 = +x},${this._y1 = +y}`;
  }
  arc(x, y, r) {
    x = +x, y = +y, r = +r;
    const x0 = x + r;
    const y0 = y;
    if (r < 0) throw new Error("negative radius");
    if (this._x1 === null) this._ += `M${x0},${y0}`;
    else if (Math.abs(this._x1 - x0) > extension_src_path_epsilon || Math.abs(this._y1 - y0) > extension_src_path_epsilon) this._ += "L" + x0 + "," + y0;
    if (!r) return;
    this._ += `A${r},${r},0,1,1,${x - r},${y}A${r},${r},0,1,1,${this._x1 = x0},${this._y1 = y0}`;
  }
  rect(x, y, w, h) {
    this._ += `M${this._x0 = this._x1 = +x},${this._y0 = this._y1 = +y}h${+w}v${+h}h${-w}Z`;
  }
  value() {
    return this._ || null;
  }
}

;// ../../node_modules/d3-delaunay/src/polygon.js
class extension_Polygon {
  constructor() {
    this._ = [];
  }
  moveTo(x, y) {
    this._.push([x, y]);
  }
  closePath() {
    this._.push(this._[0].slice());
  }
  lineTo(x, y) {
    this._.push([x, y]);
  }
  value() {
    return this._.length ? this._ : null;
  }
}

;// ../../node_modules/d3-delaunay/src/voronoi.js



class extension_Voronoi {
  constructor(delaunay, [xmin, ymin, xmax, ymax] = [0, 0, 960, 500]) {
    if (!((xmax = +xmax) >= (xmin = +xmin)) || !((ymax = +ymax) >= (ymin = +ymin))) throw new Error("invalid bounds");
    this.delaunay = delaunay;
    this._circumcenters = new Float64Array(delaunay.points.length * 2);
    this.vectors = new Float64Array(delaunay.points.length * 2);
    this.xmax = xmax, this.xmin = xmin;
    this.ymax = ymax, this.ymin = ymin;
    this._init();
  }
  update() {
    this.delaunay.update();
    this._init();
    return this;
  }
  _init() {
    const {delaunay: {points, hull, triangles}, vectors} = this;
    let bx, by; // lazily computed barycenter of the hull

    // Compute circumcenters.
    const circumcenters = this.circumcenters = this._circumcenters.subarray(0, triangles.length / 3 * 2);
    for (let i = 0, j = 0, n = triangles.length, x, y; i < n; i += 3, j += 2) {
      const t1 = triangles[i] * 2;
      const t2 = triangles[i + 1] * 2;
      const t3 = triangles[i + 2] * 2;
      const x1 = points[t1];
      const y1 = points[t1 + 1];
      const x2 = points[t2];
      const y2 = points[t2 + 1];
      const x3 = points[t3];
      const y3 = points[t3 + 1];

      const dx = x2 - x1;
      const dy = y2 - y1;
      const ex = x3 - x1;
      const ey = y3 - y1;
      const ab = (dx * ey - dy * ex) * 2;

      if (Math.abs(ab) < 1e-9) {
        // For a degenerate triangle, the circumcenter is at the infinity, in a
        // direction orthogonal to the halfedge and away from the “center” of
        // the diagram <bx, by>, defined as the hull’s barycenter.
        if (bx === undefined) {
          bx = by = 0;
          for (const i of hull) bx += points[i * 2], by += points[i * 2 + 1];
          bx /= hull.length, by /= hull.length;
        }
        const a = 1e9 * Math.sign((bx - x1) * ey - (by - y1) * ex);
        x = (x1 + x3) / 2 - a * ey;
        y = (y1 + y3) / 2 + a * ex;
      } else {
        const d = 1 / ab;
        const bl = dx * dx + dy * dy;
        const cl = ex * ex + ey * ey;
        x = x1 + (ey * bl - dy * cl) * d;
        y = y1 + (dx * cl - ex * bl) * d;
      }
      circumcenters[j] = x;
      circumcenters[j + 1] = y;
    }

    // Compute exterior cell rays.
    let h = hull[hull.length - 1];
    let p0, p1 = h * 4;
    let x0, x1 = points[2 * h];
    let y0, y1 = points[2 * h + 1];
    vectors.fill(0);
    for (let i = 0; i < hull.length; ++i) {
      h = hull[i];
      p0 = p1, x0 = x1, y0 = y1;
      p1 = h * 4, x1 = points[2 * h], y1 = points[2 * h + 1];
      vectors[p0 + 2] = vectors[p1] = y0 - y1;
      vectors[p0 + 3] = vectors[p1 + 1] = x1 - x0;
    }
  }
  render(context) {
    const buffer = context == null ? context = new extension_path_Path : undefined;
    const {delaunay: {halfedges, inedges, hull}, circumcenters, vectors} = this;
    if (hull.length <= 1) return null;
    for (let i = 0, n = halfedges.length; i < n; ++i) {
      const j = halfedges[i];
      if (j < i) continue;
      const ti = Math.floor(i / 3) * 2;
      const tj = Math.floor(j / 3) * 2;
      const xi = circumcenters[ti];
      const yi = circumcenters[ti + 1];
      const xj = circumcenters[tj];
      const yj = circumcenters[tj + 1];
      this._renderSegment(xi, yi, xj, yj, context);
    }
    let h0, h1 = hull[hull.length - 1];
    for (let i = 0; i < hull.length; ++i) {
      h0 = h1, h1 = hull[i];
      const t = Math.floor(inedges[h1] / 3) * 2;
      const x = circumcenters[t];
      const y = circumcenters[t + 1];
      const v = h0 * 4;
      const p = this._project(x, y, vectors[v + 2], vectors[v + 3]);
      if (p) this._renderSegment(x, y, p[0], p[1], context);
    }
    return buffer && buffer.value();
  }
  renderBounds(context) {
    const buffer = context == null ? context = new extension_path_Path : undefined;
    context.rect(this.xmin, this.ymin, this.xmax - this.xmin, this.ymax - this.ymin);
    return buffer && buffer.value();
  }
  renderCell(i, context) {
    const buffer = context == null ? context = new extension_path_Path : undefined;
    const points = this._clip(i);
    if (points === null || !points.length) return;
    context.moveTo(points[0], points[1]);
    let n = points.length;
    while (points[0] === points[n-2] && points[1] === points[n-1] && n > 1) n -= 2;
    for (let i = 2; i < n; i += 2) {
      if (points[i] !== points[i-2] || points[i+1] !== points[i-1])
        context.lineTo(points[i], points[i + 1]);
    }
    context.closePath();
    return buffer && buffer.value();
  }
  *cellPolygons() {
    const {delaunay: {points}} = this;
    for (let i = 0, n = points.length / 2; i < n; ++i) {
      const cell = this.cellPolygon(i);
      if (cell) cell.index = i, yield cell;
    }
  }
  cellPolygon(i) {
    const polygon = new extension_Polygon;
    this.renderCell(i, polygon);
    return polygon.value();
  }
  _renderSegment(x0, y0, x1, y1, context) {
    let S;
    const c0 = this._regioncode(x0, y0);
    const c1 = this._regioncode(x1, y1);
    if (c0 === 0 && c1 === 0) {
      context.moveTo(x0, y0);
      context.lineTo(x1, y1);
    } else if (S = this._clipSegment(x0, y0, x1, y1, c0, c1)) {
      context.moveTo(S[0], S[1]);
      context.lineTo(S[2], S[3]);
    }
  }
  contains(i, x, y) {
    if ((x = +x, x !== x) || (y = +y, y !== y)) return false;
    return this.delaunay._step(i, x, y) === i;
  }
  *neighbors(i) {
    const ci = this._clip(i);
    if (ci) for (const j of this.delaunay.neighbors(i)) {
      const cj = this._clip(j);
      // find the common edge
      if (cj) loop: for (let ai = 0, li = ci.length; ai < li; ai += 2) {
        for (let aj = 0, lj = cj.length; aj < lj; aj += 2) {
          if (ci[ai] === cj[aj]
              && ci[ai + 1] === cj[aj + 1]
              && ci[(ai + 2) % li] === cj[(aj + lj - 2) % lj]
              && ci[(ai + 3) % li] === cj[(aj + lj - 1) % lj]) {
            yield j;
            break loop;
          }
        }
      }
    }
  }
  _cell(i) {
    const {circumcenters, delaunay: {inedges, halfedges, triangles}} = this;
    const e0 = inedges[i];
    if (e0 === -1) return null; // coincident point
    const points = [];
    let e = e0;
    do {
      const t = Math.floor(e / 3);
      points.push(circumcenters[t * 2], circumcenters[t * 2 + 1]);
      e = e % 3 === 2 ? e - 2 : e + 1;
      if (triangles[e] !== i) break; // bad triangulation
      e = halfedges[e];
    } while (e !== e0 && e !== -1);
    return points;
  }
  _clip(i) {
    // degenerate case (1 valid point: return the box)
    if (i === 0 && this.delaunay.hull.length === 1) {
      return [this.xmax, this.ymin, this.xmax, this.ymax, this.xmin, this.ymax, this.xmin, this.ymin];
    }
    const points = this._cell(i);
    if (points === null) return null;
    const {vectors: V} = this;
    const v = i * 4;
    return this._simplify(V[v] || V[v + 1]
        ? this._clipInfinite(i, points, V[v], V[v + 1], V[v + 2], V[v + 3])
        : this._clipFinite(i, points));
  }
  _clipFinite(i, points) {
    const n = points.length;
    let P = null;
    let x0, y0, x1 = points[n - 2], y1 = points[n - 1];
    let c0, c1 = this._regioncode(x1, y1);
    let e0, e1 = 0;
    for (let j = 0; j < n; j += 2) {
      x0 = x1, y0 = y1, x1 = points[j], y1 = points[j + 1];
      c0 = c1, c1 = this._regioncode(x1, y1);
      if (c0 === 0 && c1 === 0) {
        e0 = e1, e1 = 0;
        if (P) P.push(x1, y1);
        else P = [x1, y1];
      } else {
        let S, sx0, sy0, sx1, sy1;
        if (c0 === 0) {
          if ((S = this._clipSegment(x0, y0, x1, y1, c0, c1)) === null) continue;
          [sx0, sy0, sx1, sy1] = S;
        } else {
          if ((S = this._clipSegment(x1, y1, x0, y0, c1, c0)) === null) continue;
          [sx1, sy1, sx0, sy0] = S;
          e0 = e1, e1 = this._edgecode(sx0, sy0);
          if (e0 && e1) this._edge(i, e0, e1, P, P.length);
          if (P) P.push(sx0, sy0);
          else P = [sx0, sy0];
        }
        e0 = e1, e1 = this._edgecode(sx1, sy1);
        if (e0 && e1) this._edge(i, e0, e1, P, P.length);
        if (P) P.push(sx1, sy1);
        else P = [sx1, sy1];
      }
    }
    if (P) {
      e0 = e1, e1 = this._edgecode(P[0], P[1]);
      if (e0 && e1) this._edge(i, e0, e1, P, P.length);
    } else if (this.contains(i, (this.xmin + this.xmax) / 2, (this.ymin + this.ymax) / 2)) {
      return [this.xmax, this.ymin, this.xmax, this.ymax, this.xmin, this.ymax, this.xmin, this.ymin];
    }
    return P;
  }
  _clipSegment(x0, y0, x1, y1, c0, c1) {
    // for more robustness, always consider the segment in the same order
    const flip = c0 < c1;
    if (flip) [x0, y0, x1, y1, c0, c1] = [x1, y1, x0, y0, c1, c0];
    while (true) {
      if (c0 === 0 && c1 === 0) return flip ? [x1, y1, x0, y0] : [x0, y0, x1, y1];
      if (c0 & c1) return null;
      let x, y, c = c0 || c1;
      if (c & 0b1000) x = x0 + (x1 - x0) * (this.ymax - y0) / (y1 - y0), y = this.ymax;
      else if (c & 0b0100) x = x0 + (x1 - x0) * (this.ymin - y0) / (y1 - y0), y = this.ymin;
      else if (c & 0b0010) y = y0 + (y1 - y0) * (this.xmax - x0) / (x1 - x0), x = this.xmax;
      else y = y0 + (y1 - y0) * (this.xmin - x0) / (x1 - x0), x = this.xmin;
      if (c0) x0 = x, y0 = y, c0 = this._regioncode(x0, y0);
      else x1 = x, y1 = y, c1 = this._regioncode(x1, y1);
    }
  }
  _clipInfinite(i, points, vx0, vy0, vxn, vyn) {
    let P = Array.from(points), p;
    if (p = this._project(P[0], P[1], vx0, vy0)) P.unshift(p[0], p[1]);
    if (p = this._project(P[P.length - 2], P[P.length - 1], vxn, vyn)) P.push(p[0], p[1]);
    if (P = this._clipFinite(i, P)) {
      for (let j = 0, n = P.length, c0, c1 = this._edgecode(P[n - 2], P[n - 1]); j < n; j += 2) {
        c0 = c1, c1 = this._edgecode(P[j], P[j + 1]);
        if (c0 && c1) j = this._edge(i, c0, c1, P, j), n = P.length;
      }
    } else if (this.contains(i, (this.xmin + this.xmax) / 2, (this.ymin + this.ymax) / 2)) {
      P = [this.xmin, this.ymin, this.xmax, this.ymin, this.xmax, this.ymax, this.xmin, this.ymax];
    }
    return P;
  }
  _edge(i, e0, e1, P, j) {
    while (e0 !== e1) {
      let x, y;
      switch (e0) {
        case 0b0101: e0 = 0b0100; continue; // top-left
        case 0b0100: e0 = 0b0110, x = this.xmax, y = this.ymin; break; // top
        case 0b0110: e0 = 0b0010; continue; // top-right
        case 0b0010: e0 = 0b1010, x = this.xmax, y = this.ymax; break; // right
        case 0b1010: e0 = 0b1000; continue; // bottom-right
        case 0b1000: e0 = 0b1001, x = this.xmin, y = this.ymax; break; // bottom
        case 0b1001: e0 = 0b0001; continue; // bottom-left
        case 0b0001: e0 = 0b0101, x = this.xmin, y = this.ymin; break; // left
      }
      // Note: this implicitly checks for out of bounds: if P[j] or P[j+1] are
      // undefined, the conditional statement will be executed.
      if ((P[j] !== x || P[j + 1] !== y) && this.contains(i, x, y)) {
        P.splice(j, 0, x, y), j += 2;
      }
    }
    return j;
  }
  _project(x0, y0, vx, vy) {
    let t = Infinity, c, x, y;
    if (vy < 0) { // top
      if (y0 <= this.ymin) return null;
      if ((c = (this.ymin - y0) / vy) < t) y = this.ymin, x = x0 + (t = c) * vx;
    } else if (vy > 0) { // bottom
      if (y0 >= this.ymax) return null;
      if ((c = (this.ymax - y0) / vy) < t) y = this.ymax, x = x0 + (t = c) * vx;
    }
    if (vx > 0) { // right
      if (x0 >= this.xmax) return null;
      if ((c = (this.xmax - x0) / vx) < t) x = this.xmax, y = y0 + (t = c) * vy;
    } else if (vx < 0) { // left
      if (x0 <= this.xmin) return null;
      if ((c = (this.xmin - x0) / vx) < t) x = this.xmin, y = y0 + (t = c) * vy;
    }
    return [x, y];
  }
  _edgecode(x, y) {
    return (x === this.xmin ? 0b0001
        : x === this.xmax ? 0b0010 : 0b0000)
        | (y === this.ymin ? 0b0100
        : y === this.ymax ? 0b1000 : 0b0000);
  }
  _regioncode(x, y) {
    return (x < this.xmin ? 0b0001
        : x > this.xmax ? 0b0010 : 0b0000)
        | (y < this.ymin ? 0b0100
        : y > this.ymax ? 0b1000 : 0b0000);
  }
  _simplify(P) {
    if (P && P.length > 4) {
      for (let i = 0; i < P.length; i+= 2) {
        const j = (i + 2) % P.length, k = (i + 4) % P.length;
        if (P[i] === P[j] && P[j] === P[k] || P[i + 1] === P[j + 1] && P[j + 1] === P[k + 1]) {
          P.splice(j, 2), i -= 2;
        }
      }
      if (!P.length) P = null;
    }
    return P;
  }
}

;// ../../node_modules/d3-delaunay/src/delaunay.js





const extension_delaunay_tau = 2 * Math.PI, extension_delaunay_pow = Math.pow;

function extension_pointX(p) {
  return p[0];
}

function extension_pointY(p) {
  return p[1];
}

// A triangulation is collinear if all its triangles have a non-null area
function extension_delaunay_collinear(d) {
  const {triangles, coords} = d;
  for (let i = 0; i < triangles.length; i += 3) {
    const a = 2 * triangles[i],
          b = 2 * triangles[i + 1],
          c = 2 * triangles[i + 2],
          cross = (coords[c] - coords[a]) * (coords[b + 1] - coords[a + 1])
                - (coords[b] - coords[a]) * (coords[c + 1] - coords[a + 1]);
    if (cross > 1e-10) return false;
  }
  return true;
}

function extension_jitter(x, y, r) {
  return [x + Math.sin(x + y) * r, y + Math.cos(x - y) * r];
}

class extension_Delaunay {
  static from(points, fx = extension_pointX, fy = extension_pointY, that) {
    return new extension_Delaunay("length" in points
        ? extension_flatArray(points, fx, fy, that)
        : Float64Array.from(extension_flatIterable(points, fx, fy, that)));
  }
  constructor(points) {
    this._delaunator = new extension_Delaunator(points);
    this.inedges = new Int32Array(points.length / 2);
    this._hullIndex = new Int32Array(points.length / 2);
    this.points = this._delaunator.coords;
    this._init();
  }
  update() {
    this._delaunator.update();
    this._init();
    return this;
  }
  _init() {
    const d = this._delaunator, points = this.points;

    // check for collinear
    if (d.hull && d.hull.length > 2 && extension_delaunay_collinear(d)) {
      this.collinear = Int32Array.from({length: points.length/2}, (_,i) => i)
        .sort((i, j) => points[2 * i] - points[2 * j] || points[2 * i + 1] - points[2 * j + 1]); // for exact neighbors
      const e = this.collinear[0], f = this.collinear[this.collinear.length - 1],
        bounds = [ points[2 * e], points[2 * e + 1], points[2 * f], points[2 * f + 1] ],
        r = 1e-8 * Math.hypot(bounds[3] - bounds[1], bounds[2] - bounds[0]);
      for (let i = 0, n = points.length / 2; i < n; ++i) {
        const p = extension_jitter(points[2 * i], points[2 * i + 1], r);
        points[2 * i] = p[0];
        points[2 * i + 1] = p[1];
      }
      this._delaunator = new extension_Delaunator(points);
    } else {
      delete this.collinear;
    }

    const halfedges = this.halfedges = this._delaunator.halfedges;
    const hull = this.hull = this._delaunator.hull;
    const triangles = this.triangles = this._delaunator.triangles;
    const inedges = this.inedges.fill(-1);
    const hullIndex = this._hullIndex.fill(-1);

    // Compute an index from each point to an (arbitrary) incoming halfedge
    // Used to give the first neighbor of each point; for this reason,
    // on the hull we give priority to exterior halfedges
    for (let e = 0, n = halfedges.length; e < n; ++e) {
      const p = triangles[e % 3 === 2 ? e - 2 : e + 1];
      if (halfedges[e] === -1 || inedges[p] === -1) inedges[p] = e;
    }
    for (let i = 0, n = hull.length; i < n; ++i) {
      hullIndex[hull[i]] = i;
    }

    // degenerate case: 1 or 2 (distinct) points
    if (hull.length <= 2 && hull.length > 0) {
      this.triangles = new Int32Array(3).fill(-1);
      this.halfedges = new Int32Array(3).fill(-1);
      this.triangles[0] = hull[0];
      inedges[hull[0]] = 1;
      if (hull.length === 2) {
        inedges[hull[1]] = 0;
        this.triangles[1] = hull[1];
        this.triangles[2] = hull[1];
      }
    }
  }
  voronoi(bounds) {
    return new extension_Voronoi(this, bounds);
  }
  *neighbors(i) {
    const {inedges, hull, _hullIndex, halfedges, triangles, collinear} = this;

    // degenerate case with several collinear points
    if (collinear) {
      const l = collinear.indexOf(i);
      if (l > 0) yield collinear[l - 1];
      if (l < collinear.length - 1) yield collinear[l + 1];
      return;
    }

    const e0 = inedges[i];
    if (e0 === -1) return; // coincident point
    let e = e0, p0 = -1;
    do {
      yield p0 = triangles[e];
      e = e % 3 === 2 ? e - 2 : e + 1;
      if (triangles[e] !== i) return; // bad triangulation
      e = halfedges[e];
      if (e === -1) {
        const p = hull[(_hullIndex[i] + 1) % hull.length];
        if (p !== p0) yield p;
        return;
      }
    } while (e !== e0);
  }
  find(x, y, i = 0) {
    if ((x = +x, x !== x) || (y = +y, y !== y)) return -1;
    const i0 = i;
    let c;
    while ((c = this._step(i, x, y)) >= 0 && c !== i && c !== i0) i = c;
    return c;
  }
  _step(i, x, y) {
    const {inedges, hull, _hullIndex, halfedges, triangles, points} = this;
    if (inedges[i] === -1 || !points.length) return (i + 1) % (points.length >> 1);
    let c = i;
    let dc = extension_delaunay_pow(x - points[i * 2], 2) + extension_delaunay_pow(y - points[i * 2 + 1], 2);
    const e0 = inedges[i];
    let e = e0;
    do {
      let t = triangles[e];
      const dt = extension_delaunay_pow(x - points[t * 2], 2) + extension_delaunay_pow(y - points[t * 2 + 1], 2);
      if (dt < dc) dc = dt, c = t;
      e = e % 3 === 2 ? e - 2 : e + 1;
      if (triangles[e] !== i) break; // bad triangulation
      e = halfedges[e];
      if (e === -1) {
        e = hull[(_hullIndex[i] + 1) % hull.length];
        if (e !== t) {
          if (extension_delaunay_pow(x - points[e * 2], 2) + extension_delaunay_pow(y - points[e * 2 + 1], 2) < dc) return e;
        }
        break;
      }
    } while (e !== e0);
    return c;
  }
  render(context) {
    const buffer = context == null ? context = new extension_path_Path : undefined;
    const {points, halfedges, triangles} = this;
    for (let i = 0, n = halfedges.length; i < n; ++i) {
      const j = halfedges[i];
      if (j < i) continue;
      const ti = triangles[i] * 2;
      const tj = triangles[j] * 2;
      context.moveTo(points[ti], points[ti + 1]);
      context.lineTo(points[tj], points[tj + 1]);
    }
    this.renderHull(context);
    return buffer && buffer.value();
  }
  renderPoints(context, r) {
    if (r === undefined && (!context || typeof context.moveTo !== "function")) r = context, context = null;
    r = r == undefined ? 2 : +r;
    const buffer = context == null ? context = new extension_path_Path : undefined;
    const {points} = this;
    for (let i = 0, n = points.length; i < n; i += 2) {
      const x = points[i], y = points[i + 1];
      context.moveTo(x + r, y);
      context.arc(x, y, r, 0, extension_delaunay_tau);
    }
    return buffer && buffer.value();
  }
  renderHull(context) {
    const buffer = context == null ? context = new extension_path_Path : undefined;
    const {hull, points} = this;
    const h = hull[0] * 2, n = hull.length;
    context.moveTo(points[h], points[h + 1]);
    for (let i = 1; i < n; ++i) {
      const h = 2 * hull[i];
      context.lineTo(points[h], points[h + 1]);
    }
    context.closePath();
    return buffer && buffer.value();
  }
  hullPolygon() {
    const polygon = new extension_Polygon;
    this.renderHull(polygon);
    return polygon.value();
  }
  renderTriangle(i, context) {
    const buffer = context == null ? context = new extension_path_Path : undefined;
    const {points, triangles} = this;
    const t0 = triangles[i *= 3] * 2;
    const t1 = triangles[i + 1] * 2;
    const t2 = triangles[i + 2] * 2;
    context.moveTo(points[t0], points[t0 + 1]);
    context.lineTo(points[t1], points[t1 + 1]);
    context.lineTo(points[t2], points[t2 + 1]);
    context.closePath();
    return buffer && buffer.value();
  }
  *trianglePolygons() {
    const {triangles} = this;
    for (let i = 0, n = triangles.length / 3; i < n; ++i) {
      yield this.trianglePolygon(i);
    }
  }
  trianglePolygon(i) {
    const polygon = new extension_Polygon;
    this.renderTriangle(i, polygon);
    return polygon.value();
  }
}

function extension_flatArray(points, fx, fy, that) {
  const n = points.length;
  const array = new Float64Array(n * 2);
  for (let i = 0; i < n; ++i) {
    const p = points[i];
    array[i * 2] = fx.call(that, p, i, points);
    array[i * 2 + 1] = fy.call(that, p, i, points);
  }
  return array;
}

function* extension_flatIterable(points, fx, fy, that) {
  let i = 0;
  for (const p of points) {
    yield fx.call(that, p, i, points);
    yield fy.call(that, p, i, points);
    ++i;
  }
}

;// ../../node_modules/vega-voronoi/build/vega-voronoi.module.js




function extension_vega_voronoi_module_Voronoi(params) {
  extension_Transform.call(this, null, params);
}
extension_vega_voronoi_module_Voronoi.Definition = {
  'type': 'Voronoi',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'x',
    'type': 'field',
    'required': true
  }, {
    'name': 'y',
    'type': 'field',
    'required': true
  }, {
    'name': 'size',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'extent',
    'type': 'array',
    'array': true,
    'length': 2,
    'default': [[-1e5, -1e5], [1e5, 1e5]],
    'content': {
      'type': 'number',
      'array': true,
      'length': 2
    }
  }, {
    'name': 'as',
    'type': 'string',
    'default': 'path'
  }]
};
const extension_defaultExtent = [-1e5, -1e5, 1e5, 1e5];
extension_inherits(extension_vega_voronoi_module_Voronoi, extension_Transform, {
  transform(_, pulse) {
    const as = _.as || 'path',
      data = pulse.source;

    // nothing to do if no data
    if (!data || !data.length) return pulse;

    // configure and construct voronoi diagram
    let s = _.size;
    s = s ? [0, 0, s[0], s[1]] : (s = _.extent) ? [s[0][0], s[0][1], s[1][0], s[1][1]] : extension_defaultExtent;
    const voronoi = this.value = extension_Delaunay.from(data, _.x, _.y).voronoi(s);

    // map polygons to paths
    for (let i = 0, n = data.length; i < n; ++i) {
      const polygon = voronoi.cellPolygon(i);
      data[i][as] = polygon && !extension_isPoint(polygon) ? extension_toPathString(polygon) : null;
    }
    return pulse.reflow(_.modified()).modifies(as);
  }
});

// suppress duplicated end point vertices
function extension_toPathString(p) {
  const x = p[0][0],
    y = p[0][1];
  let n = p.length - 1;
  for (; p[n][0] === x && p[n][1] === y; --n);
  return 'M' + p.slice(0, n + 1).join('L') + 'Z';
}
function extension_isPoint(p) {
  return p.length === 2 && p[0][0] === p[1][0] && p[0][1] === p[1][1];
}



;// ../../node_modules/vega-wordcloud/build/vega-wordcloud.module.js






/*
Copyright (c) 2013, Jason Davies.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

  * Redistributions of source code must retain the above copyright notice, this
    list of conditions and the following disclaimer.

  * Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.

  * The name Jason Davies may not be used to endorse or promote products
    derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL JASON DAVIES BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

// Word cloud layout by Jason Davies, https://www.jasondavies.com/wordcloud/
// Algorithm due to Jonathan Feinberg, http://static.mrfeinberg.com/bv_ch03.pdf

var extension_cloudRadians = Math.PI / 180,
  extension_cw = 1 << 11 >> 5,
  extension_ch = 1 << 11;
function extension_cloud () {
  var size = [256, 256],
    text,
    font,
    fontSize,
    fontStyle,
    fontWeight,
    rotate,
    padding,
    spiral = extension_archimedeanSpiral,
    words = [],
    random = Math.random,
    cloud = {};
  cloud.layout = function () {
    var contextAndRatio = getContext(extension_domCanvas()),
      board = extension_zeroArray((size[0] >> 5) * size[1]),
      bounds = null,
      n = words.length,
      i = -1,
      tags = [],
      data = words.map(d => ({
        text: text(d),
        font: font(d),
        style: fontStyle(d),
        weight: fontWeight(d),
        rotate: rotate(d),
        size: ~~(fontSize(d) + 1e-14),
        padding: padding(d),
        xoff: 0,
        yoff: 0,
        x1: 0,
        y1: 0,
        x0: 0,
        y0: 0,
        hasText: false,
        sprite: null,
        datum: d
      })).sort((a, b) => b.size - a.size);
    while (++i < n) {
      var d = data[i];
      d.x = size[0] * (random() + .5) >> 1;
      d.y = size[1] * (random() + .5) >> 1;
      extension_cloudSprite(contextAndRatio, d, data, i);
      if (d.hasText && place(board, d, bounds)) {
        tags.push(d);
        if (bounds) extension_cloudBounds(bounds, d);else bounds = [{
          x: d.x + d.x0,
          y: d.y + d.y0
        }, {
          x: d.x + d.x1,
          y: d.y + d.y1
        }];
        // Temporary hack
        d.x -= size[0] >> 1;
        d.y -= size[1] >> 1;
      }
    }
    return tags;
  };
  function getContext(canvas) {
    canvas.width = canvas.height = 1;
    var ratio = Math.sqrt(canvas.getContext('2d').getImageData(0, 0, 1, 1).data.length >> 2);
    canvas.width = (extension_cw << 5) / ratio;
    canvas.height = extension_ch / ratio;
    var context = canvas.getContext('2d');
    context.fillStyle = context.strokeStyle = 'red';
    context.textAlign = 'center';
    return {
      context: context,
      ratio: ratio
    };
  }
  function place(board, tag, bounds) {
    var startX = tag.x,
      startY = tag.y,
      maxDelta = Math.hypot(size[0], size[1]),
      s = spiral(size),
      dt = random() < .5 ? 1 : -1,
      t = -dt,
      dxdy,
      dx,
      dy;
    while (dxdy = s(t += dt)) {
      dx = ~~dxdy[0];
      dy = ~~dxdy[1];
      if (Math.min(Math.abs(dx), Math.abs(dy)) >= maxDelta) break;
      tag.x = startX + dx;
      tag.y = startY + dy;
      if (tag.x + tag.x0 < 0 || tag.y + tag.y0 < 0 || tag.x + tag.x1 > size[0] || tag.y + tag.y1 > size[1]) continue;
      // TODO only check for collisions within current bounds.
      if (!bounds || !extension_cloudCollide(tag, board, size[0])) {
        if (!bounds || extension_collideRects(tag, bounds)) {
          var sprite = tag.sprite,
            w = tag.width >> 5,
            sw = size[0] >> 5,
            lx = tag.x - (w << 4),
            sx = lx & 0x7f,
            msx = 32 - sx,
            h = tag.y1 - tag.y0,
            x = (tag.y + tag.y0) * sw + (lx >> 5),
            last;
          for (var j = 0; j < h; j++) {
            last = 0;
            for (var i = 0; i <= w; i++) {
              board[x + i] |= last << msx | (i < w ? (last = sprite[j * w + i]) >>> sx : 0);
            }
            x += sw;
          }
          tag.sprite = null;
          return true;
        }
      }
    }
    return false;
  }
  cloud.words = function (_) {
    if (arguments.length) {
      words = _;
      return cloud;
    } else {
      return words;
    }
  };
  cloud.size = function (_) {
    if (arguments.length) {
      size = [+_[0], +_[1]];
      return cloud;
    } else {
      return size;
    }
  };
  cloud.font = function (_) {
    if (arguments.length) {
      font = extension_functor(_);
      return cloud;
    } else {
      return font;
    }
  };
  cloud.fontStyle = function (_) {
    if (arguments.length) {
      fontStyle = extension_functor(_);
      return cloud;
    } else {
      return fontStyle;
    }
  };
  cloud.fontWeight = function (_) {
    if (arguments.length) {
      fontWeight = extension_functor(_);
      return cloud;
    } else {
      return fontWeight;
    }
  };
  cloud.rotate = function (_) {
    if (arguments.length) {
      rotate = extension_functor(_);
      return cloud;
    } else {
      return rotate;
    }
  };
  cloud.text = function (_) {
    if (arguments.length) {
      text = extension_functor(_);
      return cloud;
    } else {
      return text;
    }
  };
  cloud.spiral = function (_) {
    if (arguments.length) {
      spiral = extension_spirals[_] || _;
      return cloud;
    } else {
      return spiral;
    }
  };
  cloud.fontSize = function (_) {
    if (arguments.length) {
      fontSize = extension_functor(_);
      return cloud;
    } else {
      return fontSize;
    }
  };
  cloud.padding = function (_) {
    if (arguments.length) {
      padding = extension_functor(_);
      return cloud;
    } else {
      return padding;
    }
  };
  cloud.random = function (_) {
    if (arguments.length) {
      random = _;
      return cloud;
    } else {
      return random;
    }
  };
  return cloud;
}

// Fetches a monochrome sprite bitmap for the specified text.
// Load in batches for speed.
function extension_cloudSprite(contextAndRatio, d, data, di) {
  if (d.sprite) return;
  var c = contextAndRatio.context,
    ratio = contextAndRatio.ratio;
  c.clearRect(0, 0, (extension_cw << 5) / ratio, extension_ch / ratio);
  var x = 0,
    y = 0,
    maxh = 0,
    n = data.length,
    w,
    w32,
    h,
    i,
    j;
  --di;
  while (++di < n) {
    d = data[di];
    c.save();
    c.font = d.style + ' ' + d.weight + ' ' + ~~((d.size + 1) / ratio) + 'px ' + d.font;
    w = c.measureText(d.text + 'm').width * ratio;
    h = d.size << 1;
    if (d.rotate) {
      var sr = Math.sin(d.rotate * extension_cloudRadians),
        cr = Math.cos(d.rotate * extension_cloudRadians),
        wcr = w * cr,
        wsr = w * sr,
        hcr = h * cr,
        hsr = h * sr;
      w = Math.max(Math.abs(wcr + hsr), Math.abs(wcr - hsr)) + 0x1f >> 5 << 5;
      h = ~~Math.max(Math.abs(wsr + hcr), Math.abs(wsr - hcr));
    } else {
      w = w + 0x1f >> 5 << 5;
    }
    if (h > maxh) maxh = h;
    if (x + w >= extension_cw << 5) {
      x = 0;
      y += maxh;
      maxh = 0;
    }
    if (y + h >= extension_ch) break;
    c.translate((x + (w >> 1)) / ratio, (y + (h >> 1)) / ratio);
    if (d.rotate) c.rotate(d.rotate * extension_cloudRadians);
    c.fillText(d.text, 0, 0);
    if (d.padding) {
      c.lineWidth = 2 * d.padding;
      c.strokeText(d.text, 0, 0);
    }
    c.restore();
    d.width = w;
    d.height = h;
    d.xoff = x;
    d.yoff = y;
    d.x1 = w >> 1;
    d.y1 = h >> 1;
    d.x0 = -d.x1;
    d.y0 = -d.y1;
    d.hasText = true;
    x += w;
  }
  var pixels = c.getImageData(0, 0, (extension_cw << 5) / ratio, extension_ch / ratio).data,
    sprite = [];
  while (--di >= 0) {
    d = data[di];
    if (!d.hasText) continue;
    w = d.width;
    w32 = w >> 5;
    h = d.y1 - d.y0;
    // Zero the buffer
    for (i = 0; i < h * w32; i++) sprite[i] = 0;
    x = d.xoff;
    if (x == null) return;
    y = d.yoff;
    var seen = 0,
      seenRow = -1;
    for (j = 0; j < h; j++) {
      for (i = 0; i < w; i++) {
        var k = w32 * j + (i >> 5),
          m = pixels[(y + j) * (extension_cw << 5) + (x + i) << 2] ? 1 << 31 - i % 32 : 0;
        sprite[k] |= m;
        seen |= m;
      }
      if (seen) seenRow = j;else {
        d.y0++;
        h--;
        j--;
        y++;
      }
    }
    d.y1 = d.y0 + seenRow;
    d.sprite = sprite.slice(0, (d.y1 - d.y0) * w32);
  }
}

// Use mask-based collision detection.
function extension_cloudCollide(tag, board, sw) {
  sw >>= 5;
  var sprite = tag.sprite,
    w = tag.width >> 5,
    lx = tag.x - (w << 4),
    sx = lx & 0x7f,
    msx = 32 - sx,
    h = tag.y1 - tag.y0,
    x = (tag.y + tag.y0) * sw + (lx >> 5),
    last;
  for (var j = 0; j < h; j++) {
    last = 0;
    for (var i = 0; i <= w; i++) {
      if ((last << msx | (i < w ? (last = sprite[j * w + i]) >>> sx : 0)) & board[x + i]) return true;
    }
    x += sw;
  }
  return false;
}
function extension_cloudBounds(bounds, d) {
  var b0 = bounds[0],
    b1 = bounds[1];
  if (d.x + d.x0 < b0.x) b0.x = d.x + d.x0;
  if (d.y + d.y0 < b0.y) b0.y = d.y + d.y0;
  if (d.x + d.x1 > b1.x) b1.x = d.x + d.x1;
  if (d.y + d.y1 > b1.y) b1.y = d.y + d.y1;
}
function extension_collideRects(a, b) {
  return a.x + a.x1 > b[0].x && a.x + a.x0 < b[1].x && a.y + a.y1 > b[0].y && a.y + a.y0 < b[1].y;
}
function extension_archimedeanSpiral(size) {
  var e = size[0] / size[1];
  return function (t) {
    return [e * (t *= .1) * Math.cos(t), t * Math.sin(t)];
  };
}
function extension_rectangularSpiral(size) {
  var dy = 4,
    dx = dy * size[0] / size[1],
    x = 0,
    y = 0;
  return function (t) {
    var sign = t < 0 ? -1 : 1;
    // See triangular numbers: T_n = n * (n + 1) / 2.
    switch (Math.sqrt(1 + 4 * sign * t) - sign & 3) {
      case 0:
        x += dx;
        break;
      case 1:
        y += dy;
        break;
      case 2:
        x -= dx;
        break;
      default:
        y -= dy;
        break;
    }
    return [x, y];
  };
}

// TODO reuse arrays?
function extension_zeroArray(n) {
  var a = [],
    i = -1;
  while (++i < n) a[i] = 0;
  return a;
}
function extension_functor(d) {
  return typeof d === 'function' ? d : function () {
    return d;
  };
}
var extension_spirals = {
  archimedean: extension_archimedeanSpiral,
  rectangular: extension_rectangularSpiral
};

const extension_vega_wordcloud_module_Output = ['x', 'y', 'font', 'fontSize', 'fontStyle', 'fontWeight', 'angle'];
const extension_vega_wordcloud_module_Params = ['text', 'font', 'rotate', 'fontSize', 'fontStyle', 'fontWeight'];
function extension_Wordcloud(params) {
  extension_Transform.call(this, extension_cloud(), params);
}
extension_Wordcloud.Definition = {
  'type': 'Wordcloud',
  'metadata': {
    'modifies': true
  },
  'params': [{
    'name': 'size',
    'type': 'number',
    'array': true,
    'length': 2
  }, {
    'name': 'font',
    'type': 'string',
    'expr': true,
    'default': 'sans-serif'
  }, {
    'name': 'fontStyle',
    'type': 'string',
    'expr': true,
    'default': 'normal'
  }, {
    'name': 'fontWeight',
    'type': 'string',
    'expr': true,
    'default': 'normal'
  }, {
    'name': 'fontSize',
    'type': 'number',
    'expr': true,
    'default': 14
  }, {
    'name': 'fontSizeRange',
    'type': 'number',
    'array': 'nullable',
    'default': [10, 50]
  }, {
    'name': 'rotate',
    'type': 'number',
    'expr': true,
    'default': 0
  }, {
    'name': 'text',
    'type': 'field'
  }, {
    'name': 'spiral',
    'type': 'string',
    'values': ['archimedean', 'rectangular']
  }, {
    'name': 'padding',
    'type': 'number',
    'expr': true
  }, {
    'name': 'as',
    'type': 'string',
    'array': true,
    'length': 7,
    'default': extension_vega_wordcloud_module_Output
  }]
};
extension_inherits(extension_Wordcloud, extension_Transform, {
  transform(_, pulse) {
    if (_.size && !(_.size[0] && _.size[1])) {
      extension_vega_util_module_error('Wordcloud size dimensions must be non-zero.');
    }
    function modp(param) {
      const p = _[param];
      return extension_vega_util_module_isFunction(p) && pulse.modified(p.fields);
    }
    const mod = _.modified();
    if (!(mod || pulse.changed(pulse.ADD_REM) || extension_vega_wordcloud_module_Params.some(modp))) return;
    const data = pulse.materialize(pulse.SOURCE).source,
      layout = this.value,
      as = _.as || extension_vega_wordcloud_module_Output;
    let fontSize = _.fontSize || 14,
      range;
    extension_vega_util_module_isFunction(fontSize) ? range = _.fontSizeRange : fontSize = extension_vega_util_module_constant(fontSize);

    // create font size scaling function as needed
    if (range) {
      const fsize = fontSize,
        sizeScale = extension_vega_scale_module_scale('sqrt')().domain(extension_extent(data, fsize)).range(range);
      fontSize = x => sizeScale(fsize(x));
    }
    data.forEach(t => {
      t[as[0]] = NaN;
      t[as[1]] = NaN;
      t[as[3]] = 0;
    });

    // configure layout
    const words = layout.words(data).text(_.text).size(_.size || [500, 500]).padding(_.padding || 1).spiral(_.spiral || 'archimedean').rotate(_.rotate || 0).font(_.font || 'sans-serif').fontStyle(_.fontStyle || 'normal').fontWeight(_.fontWeight || 'normal').fontSize(fontSize).random(extension_vega_statistics_module_random).layout();
    const size = layout.size(),
      dx = size[0] >> 1,
      dy = size[1] >> 1,
      n = words.length;
    for (let i = 0, w, t; i < n; ++i) {
      w = words[i];
      t = w.datum;
      t[as[0]] = w.x + dx;
      t[as[1]] = w.y + dy;
      t[as[2]] = w.font;
      t[as[3]] = w.size;
      t[as[4]] = w.style;
      t[as[5]] = w.weight;
      t[as[6]] = w.rotate;
    }
    return pulse.reflow(mod).modifies(as);
  }
});



;// ../../node_modules/d3-array/src/permute.js
function extension_permute_permute(source, keys) {
  return Array.from(keys, key => source[key]);
}

;// ../../node_modules/vega-crossfilter/build/vega-crossfilter.module.js




const extension_array8 = n => new Uint8Array(n);
const extension_array16 = n => new Uint16Array(n);
const extension_array32 = n => new Uint32Array(n);

/**
 * Maintains CrossFilter state.
 */
function extension_Bitmaps() {
  let width = 8,
    data = [],
    seen = extension_array32(0),
    curr = extension_vega_crossfilter_module_array(0, width),
    prev = extension_vega_crossfilter_module_array(0, width);
  return {
    data: () => data,
    seen: () => seen = extension_lengthen(seen, data.length),
    add(array) {
      for (let i = 0, j = data.length, n = array.length, t; i < n; ++i) {
        t = array[i];
        t._index = j++;
        data.push(t);
      }
    },
    remove(num, map) {
      // map: index -> boolean (true => remove)
      const n = data.length,
        copy = Array(n - num),
        reindex = data; // reuse old data array for index map
      let t, i, j;

      // seek forward to first removal
      for (i = 0; !map[i] && i < n; ++i) {
        copy[i] = data[i];
        reindex[i] = i;
      }

      // condense arrays
      for (j = i; i < n; ++i) {
        t = data[i];
        if (!map[i]) {
          reindex[i] = j;
          curr[j] = curr[i];
          prev[j] = prev[i];
          copy[j] = t;
          t._index = j++;
        } else {
          reindex[i] = -1;
        }
        curr[i] = 0; // clear unused bits
      }
      data = copy;
      return reindex;
    },
    size: () => data.length,
    curr: () => curr,
    prev: () => prev,
    reset: k => prev[k] = curr[k],
    all: () => width < 0x101 ? 0xff : width < 0x10001 ? 0xffff : 0xffffffff,
    set(k, one) {
      curr[k] |= one;
    },
    clear(k, one) {
      curr[k] &= ~one;
    },
    resize(n, m) {
      const k = curr.length;
      if (n > k || m > width) {
        width = Math.max(m, width);
        curr = extension_vega_crossfilter_module_array(n, width, curr);
        prev = extension_vega_crossfilter_module_array(n, width);
      }
    }
  };
}
function extension_lengthen(array, length, copy) {
  if (array.length >= length) return array;
  copy = copy || new array.constructor(length);
  copy.set(array);
  return copy;
}
function extension_vega_crossfilter_module_array(n, m, array) {
  const copy = (m < 0x101 ? extension_array8 : m < 0x10001 ? extension_array16 : extension_array32)(n);
  if (array) copy.set(array);
  return copy;
}

function extension_Dimension (index, i, query) {
  const bit = 1 << i;
  return {
    one: bit,
    zero: ~bit,
    range: query.slice(),
    bisect: index.bisect,
    index: index.index,
    size: index.size,
    onAdd(added, curr) {
      const dim = this,
        range = dim.bisect(dim.range, added.value),
        idx = added.index,
        lo = range[0],
        hi = range[1],
        n1 = idx.length;
      let i;
      for (i = 0; i < lo; ++i) curr[idx[i]] |= bit;
      for (i = hi; i < n1; ++i) curr[idx[i]] |= bit;
      return dim;
    }
  };
}

/**
 * Maintains a list of values, sorted by key.
 */
function extension_SortedIndex() {
  let index = extension_array32(0),
    value = [],
    size = 0;
  function insert(key, data, base) {
    if (!data.length) return [];
    const n0 = size,
      n1 = data.length,
      addi = extension_array32(n1);
    let addv = Array(n1),
      oldv,
      oldi,
      i;
    for (i = 0; i < n1; ++i) {
      addv[i] = key(data[i]);
      addi[i] = i;
    }
    addv = extension_vega_crossfilter_module_sort(addv, addi);
    if (n0) {
      oldv = value;
      oldi = index;
      value = Array(n0 + n1);
      index = extension_array32(n0 + n1);
      extension_vega_crossfilter_module_merge(base, oldv, oldi, n0, addv, addi, n1, value, index);
    } else {
      if (base > 0) for (i = 0; i < n1; ++i) {
        addi[i] += base;
      }
      value = addv;
      index = addi;
    }
    size = n0 + n1;
    return {
      index: addi,
      value: addv
    };
  }
  function remove(num, map) {
    // map: index -> remove
    const n = size;
    let idx, i, j;

    // seek forward to first removal
    for (i = 0; !map[index[i]] && i < n; ++i);

    // condense index and value arrays
    for (j = i; i < n; ++i) {
      if (!map[idx = index[i]]) {
        index[j] = idx;
        value[j] = value[i];
        ++j;
      }
    }
    size = n - num;
  }
  function reindex(map) {
    for (let i = 0, n = size; i < n; ++i) {
      index[i] = map[index[i]];
    }
  }
  function bisect(range, array) {
    let n;
    if (array) {
      n = array.length;
    } else {
      array = value;
      n = size;
    }
    return [extension_bisectLeft(array, range[0], 0, n), extension_bisectRight(array, range[1], 0, n)];
  }
  return {
    insert: insert,
    remove: remove,
    bisect: bisect,
    reindex: reindex,
    index: () => index,
    size: () => size
  };
}
function extension_vega_crossfilter_module_sort(values, index) {
  values.sort.call(index, (a, b) => {
    const x = values[a],
      y = values[b];
    return x < y ? -1 : x > y ? 1 : 0;
  });
  return extension_permute_permute(values, index);
}
function extension_vega_crossfilter_module_merge(base, value0, index0, n0, value1, index1, n1, value, index) {
  let i0 = 0,
    i1 = 0,
    i;
  for (i = 0; i0 < n0 && i1 < n1; ++i) {
    if (value0[i0] < value1[i1]) {
      value[i] = value0[i0];
      index[i] = index0[i0++];
    } else {
      value[i] = value1[i1];
      index[i] = index1[i1++] + base;
    }
  }
  for (; i0 < n0; ++i0, ++i) {
    value[i] = value0[i0];
    index[i] = index0[i0];
  }
  for (; i1 < n1; ++i1, ++i) {
    value[i] = value1[i1];
    index[i] = index1[i1] + base;
  }
}

/**
 * An indexed multi-dimensional filter.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {Array<function(object): *>} params.fields - An array of dimension accessors to filter.
 * @param {Array} params.query - An array of per-dimension range queries.
 */
function extension_CrossFilter(params) {
  extension_Transform.call(this, extension_Bitmaps(), params);
  this._indices = null;
  this._dims = null;
}
extension_CrossFilter.Definition = {
  'type': 'CrossFilter',
  'metadata': {},
  'params': [{
    'name': 'fields',
    'type': 'field',
    'array': true,
    'required': true
  }, {
    'name': 'query',
    'type': 'array',
    'array': true,
    'required': true,
    'content': {
      'type': 'number',
      'array': true,
      'length': 2
    }
  }]
};
extension_inherits(extension_CrossFilter, extension_Transform, {
  transform(_, pulse) {
    if (!this._dims) {
      return this.init(_, pulse);
    } else {
      var init = _.modified('fields') || _.fields.some(f => pulse.modified(f.fields));
      return init ? this.reinit(_, pulse) : this.eval(_, pulse);
    }
  },
  init(_, pulse) {
    const fields = _.fields,
      query = _.query,
      indices = this._indices = {},
      dims = this._dims = [],
      m = query.length;
    let i = 0,
      key,
      index;

    // instantiate indices and dimensions
    for (; i < m; ++i) {
      key = fields[i].fname;
      index = indices[key] || (indices[key] = extension_SortedIndex());
      dims.push(extension_Dimension(index, i, query[i]));
    }
    return this.eval(_, pulse);
  },
  reinit(_, pulse) {
    const output = pulse.materialize().fork(),
      fields = _.fields,
      query = _.query,
      indices = this._indices,
      dims = this._dims,
      bits = this.value,
      curr = bits.curr(),
      prev = bits.prev(),
      all = bits.all(),
      out = output.rem = output.add,
      mod = output.mod,
      m = query.length,
      adds = {};
    let add, index, key, mods, remMap, modMap, i, n, f;

    // set prev to current state
    prev.set(curr);

    // if pulse has remove tuples, process them first
    if (pulse.rem.length) {
      remMap = this.remove(_, pulse, output);
    }

    // if pulse has added tuples, add them to state
    if (pulse.add.length) {
      bits.add(pulse.add);
    }

    // if pulse has modified tuples, create an index map
    if (pulse.mod.length) {
      modMap = {};
      for (mods = pulse.mod, i = 0, n = mods.length; i < n; ++i) {
        modMap[mods[i]._index] = 1;
      }
    }

    // re-initialize indices as needed, update curr bitmap
    for (i = 0; i < m; ++i) {
      f = fields[i];
      if (!dims[i] || _.modified('fields', i) || pulse.modified(f.fields)) {
        key = f.fname;
        if (!(add = adds[key])) {
          indices[key] = index = extension_SortedIndex();
          adds[key] = add = index.insert(f, pulse.source, 0);
        }
        dims[i] = extension_Dimension(index, i, query[i]).onAdd(add, curr);
      }
    }

    // visit each tuple
    // if filter state changed, push index to add/rem
    // else if in mod and passes a filter, push index to mod
    for (i = 0, n = bits.data().length; i < n; ++i) {
      if (remMap[i]) {
        // skip if removed tuple
        continue;
      } else if (prev[i] !== curr[i]) {
        // add if state changed
        out.push(i);
      } else if (modMap[i] && curr[i] !== all) {
        // otherwise, pass mods through
        mod.push(i);
      }
    }
    bits.mask = (1 << m) - 1;
    return output;
  },
  eval(_, pulse) {
    const output = pulse.materialize().fork(),
      m = this._dims.length;
    let mask = 0;
    if (pulse.rem.length) {
      this.remove(_, pulse, output);
      mask |= (1 << m) - 1;
    }
    if (_.modified('query') && !_.modified('fields')) {
      mask |= this.update(_, pulse, output);
    }
    if (pulse.add.length) {
      this.insert(_, pulse, output);
      mask |= (1 << m) - 1;
    }
    if (pulse.mod.length) {
      this.modify(pulse, output);
      mask |= (1 << m) - 1;
    }
    this.value.mask = mask;
    return output;
  },
  insert(_, pulse, output) {
    const tuples = pulse.add,
      bits = this.value,
      dims = this._dims,
      indices = this._indices,
      fields = _.fields,
      adds = {},
      out = output.add,
      n = bits.size() + tuples.length,
      m = dims.length;
    let k = bits.size(),
      j,
      key,
      add;

    // resize bitmaps and add tuples as needed
    bits.resize(n, m);
    bits.add(tuples);
    const curr = bits.curr(),
      prev = bits.prev(),
      all = bits.all();

    // add to dimensional indices
    for (j = 0; j < m; ++j) {
      key = fields[j].fname;
      add = adds[key] || (adds[key] = indices[key].insert(fields[j], tuples, k));
      dims[j].onAdd(add, curr);
    }

    // set previous filters, output if passes at least one filter
    for (; k < n; ++k) {
      prev[k] = all;
      if (curr[k] !== all) out.push(k);
    }
  },
  modify(pulse, output) {
    const out = output.mod,
      bits = this.value,
      curr = bits.curr(),
      all = bits.all(),
      tuples = pulse.mod;
    let i, n, k;
    for (i = 0, n = tuples.length; i < n; ++i) {
      k = tuples[i]._index;
      if (curr[k] !== all) out.push(k);
    }
  },
  remove(_, pulse, output) {
    const indices = this._indices,
      bits = this.value,
      curr = bits.curr(),
      prev = bits.prev(),
      all = bits.all(),
      map = {},
      out = output.rem,
      tuples = pulse.rem;
    let i, n, k, f;

    // process tuples, output if passes at least one filter
    for (i = 0, n = tuples.length; i < n; ++i) {
      k = tuples[i]._index;
      map[k] = 1; // build index map
      prev[k] = f = curr[k];
      curr[k] = all;
      if (f !== all) out.push(k);
    }

    // remove from dimensional indices
    for (k in indices) {
      indices[k].remove(n, map);
    }
    this.reindex(pulse, n, map);
    return map;
  },
  // reindex filters and indices after propagation completes
  reindex(pulse, num, map) {
    const indices = this._indices,
      bits = this.value;
    pulse.runAfter(() => {
      const indexMap = bits.remove(num, map);
      for (const key in indices) indices[key].reindex(indexMap);
    });
  },
  update(_, pulse, output) {
    const dims = this._dims,
      query = _.query,
      stamp = pulse.stamp,
      m = dims.length;
    let mask = 0,
      i,
      q;

    // survey how many queries have changed
    output.filters = 0;
    for (q = 0; q < m; ++q) {
      if (_.modified('query', q)) {
        i = q;
        ++mask;
      }
    }
    if (mask === 1) {
      // only one query changed, use more efficient update
      mask = dims[i].one;
      this.incrementOne(dims[i], query[i], output.add, output.rem);
    } else {
      // multiple queries changed, perform full record keeping
      for (q = 0, mask = 0; q < m; ++q) {
        if (!_.modified('query', q)) continue;
        mask |= dims[q].one;
        this.incrementAll(dims[q], query[q], stamp, output.add);
        output.rem = output.add; // duplicate add/rem for downstream resolve
      }
    }
    return mask;
  },
  incrementAll(dim, query, stamp, out) {
    const bits = this.value,
      seen = bits.seen(),
      curr = bits.curr(),
      prev = bits.prev(),
      index = dim.index(),
      old = dim.bisect(dim.range),
      range = dim.bisect(query),
      lo1 = range[0],
      hi1 = range[1],
      lo0 = old[0],
      hi0 = old[1],
      one = dim.one;
    let i, j, k;

    // Fast incremental update based on previous lo index.
    if (lo1 < lo0) {
      for (i = lo1, j = Math.min(lo0, hi1); i < j; ++i) {
        k = index[i];
        if (seen[k] !== stamp) {
          prev[k] = curr[k];
          seen[k] = stamp;
          out.push(k);
        }
        curr[k] ^= one;
      }
    } else if (lo1 > lo0) {
      for (i = lo0, j = Math.min(lo1, hi0); i < j; ++i) {
        k = index[i];
        if (seen[k] !== stamp) {
          prev[k] = curr[k];
          seen[k] = stamp;
          out.push(k);
        }
        curr[k] ^= one;
      }
    }

    // Fast incremental update based on previous hi index.
    if (hi1 > hi0) {
      for (i = Math.max(lo1, hi0), j = hi1; i < j; ++i) {
        k = index[i];
        if (seen[k] !== stamp) {
          prev[k] = curr[k];
          seen[k] = stamp;
          out.push(k);
        }
        curr[k] ^= one;
      }
    } else if (hi1 < hi0) {
      for (i = Math.max(lo0, hi1), j = hi0; i < j; ++i) {
        k = index[i];
        if (seen[k] !== stamp) {
          prev[k] = curr[k];
          seen[k] = stamp;
          out.push(k);
        }
        curr[k] ^= one;
      }
    }
    dim.range = query.slice();
  },
  incrementOne(dim, query, add, rem) {
    const bits = this.value,
      curr = bits.curr(),
      index = dim.index(),
      old = dim.bisect(dim.range),
      range = dim.bisect(query),
      lo1 = range[0],
      hi1 = range[1],
      lo0 = old[0],
      hi0 = old[1],
      one = dim.one;
    let i, j, k;

    // Fast incremental update based on previous lo index.
    if (lo1 < lo0) {
      for (i = lo1, j = Math.min(lo0, hi1); i < j; ++i) {
        k = index[i];
        curr[k] ^= one;
        add.push(k);
      }
    } else if (lo1 > lo0) {
      for (i = lo0, j = Math.min(lo1, hi0); i < j; ++i) {
        k = index[i];
        curr[k] ^= one;
        rem.push(k);
      }
    }

    // Fast incremental update based on previous hi index.
    if (hi1 > hi0) {
      for (i = Math.max(lo1, hi0), j = hi1; i < j; ++i) {
        k = index[i];
        curr[k] ^= one;
        add.push(k);
      }
    } else if (hi1 < hi0) {
      for (i = Math.max(lo0, hi1), j = hi0; i < j; ++i) {
        k = index[i];
        curr[k] ^= one;
        rem.push(k);
      }
    }
    dim.range = query.slice();
  }
});

/**
 * Selectively filters tuples by resolving against a filter bitmap.
 * Useful for processing the output of a cross-filter transform.
 * @constructor
 * @param {object} params - The parameters for this operator.
 * @param {object} params.ignore - A bit mask indicating which filters to ignore.
 * @param {object} params.filter - The per-tuple filter bitmaps. Typically this
 *   parameter value is a reference to a {@link CrossFilter} transform.
 */
function extension_ResolveFilter(params) {
  extension_Transform.call(this, null, params);
}
extension_ResolveFilter.Definition = {
  'type': 'ResolveFilter',
  'metadata': {},
  'params': [{
    'name': 'ignore',
    'type': 'number',
    'required': true,
    'description': 'A bit mask indicating which filters to ignore.'
  }, {
    'name': 'filter',
    'type': 'object',
    'required': true,
    'description': 'Per-tuple filter bitmaps from a CrossFilter transform.'
  }]
};
extension_inherits(extension_ResolveFilter, extension_Transform, {
  transform(_, pulse) {
    const ignore = ~(_.ignore || 0),
      // bit mask where zeros -> dims to ignore
      bitmap = _.filter,
      mask = bitmap.mask;

    // exit early if no relevant filter changes
    if ((mask & ignore) === 0) return pulse.StopPropagation;
    const output = pulse.fork(pulse.ALL),
      data = bitmap.data(),
      curr = bitmap.curr(),
      prev = bitmap.prev(),
      pass = k => !(curr[k] & ignore) ? data[k] : null;

    // propagate all mod tuples that pass the filter
    output.filter(output.MOD, pass);

    // determine add & rem tuples via filter functions
    // for efficiency, we do *not* populate new arrays,
    // instead we add filter functions applied downstream

    if (!(mask & mask - 1)) {
      // only one filter changed
      output.filter(output.ADD, pass);
      output.filter(output.REM, k => (curr[k] & ignore) === mask ? data[k] : null);
    } else {
      // multiple filters changed
      output.filter(output.ADD, k => {
        const c = curr[k] & ignore,
          f = !c && c ^ prev[k] & ignore;
        return f ? data[k] : null;
      });
      output.filter(output.REM, k => {
        const c = curr[k] & ignore,
          f = c && !(c ^ (c ^ prev[k] & ignore));
        return f ? data[k] : null;
      });
    }

    // add filter to source data in case of reflow...
    return output.filter(output.SOURCE, t => pass(t._index));
  }
});



;// ../../node_modules/vega-expression/build/vega-expression.module.js


const extension_RawCode = 'RawCode';
const extension_vega_expression_module_Literal = 'Literal';
const extension_vega_expression_module_Property = 'Property';
const extension_vega_expression_module_Identifier = 'Identifier';
const extension_ArrayExpression = 'ArrayExpression';
const extension_BinaryExpression = 'BinaryExpression';
const extension_CallExpression = 'CallExpression';
const extension_ConditionalExpression = 'ConditionalExpression';
const extension_LogicalExpression = 'LogicalExpression';
const extension_vega_expression_module_MemberExpression = 'MemberExpression';
const extension_vega_expression_module_ObjectExpression = 'ObjectExpression';
const extension_UnaryExpression = 'UnaryExpression';
function extension_ASTNode(type) {
  this.type = type;
}
extension_ASTNode.prototype.visit = function (visitor) {
  let c, i, n;
  if (visitor(this)) return 1;
  for (c = extension_vega_expression_module_children(this), i = 0, n = c.length; i < n; ++i) {
    if (c[i].visit(visitor)) return 1;
  }
};
function extension_vega_expression_module_children(node) {
  switch (node.type) {
    case extension_ArrayExpression:
      return node.elements;
    case extension_BinaryExpression:
    case extension_LogicalExpression:
      return [node.left, node.right];
    case extension_CallExpression:
      return [node.callee].concat(node.arguments);
    case extension_ConditionalExpression:
      return [node.test, node.consequent, node.alternate];
    case extension_vega_expression_module_MemberExpression:
      return [node.object, node.property];
    case extension_vega_expression_module_ObjectExpression:
      return node.properties;
    case extension_vega_expression_module_Property:
      return [node.key, node.value];
    case extension_UnaryExpression:
      return [node.argument];
    case extension_vega_expression_module_Identifier:
    case extension_vega_expression_module_Literal:
    case extension_RawCode:
    default:
      return [];
  }
}

/*
  The following expression parser is based on Esprima (http://esprima.org/).
  Original header comment and license for Esprima is included here:

  Copyright (C) 2013 Ariya Hidayat <ariya.hidayat@gmail.com>
  Copyright (C) 2013 Thaddee Tyl <thaddee.tyl@gmail.com>
  Copyright (C) 2013 Mathias Bynens <mathias@qiwi.be>
  Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com>
  Copyright (C) 2012 Mathias Bynens <mathias@qiwi.be>
  Copyright (C) 2012 Joost-Wim Boekesteijn <joost-wim@boekesteijn.nl>
  Copyright (C) 2012 Kris Kowal <kris.kowal@cixar.com>
  Copyright (C) 2012 Yusuke Suzuki <utatane.tea@gmail.com>
  Copyright (C) 2012 Arpad Borsos <arpad.borsos@googlemail.com>
  Copyright (C) 2011 Ariya Hidayat <ariya.hidayat@gmail.com>

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
var extension_TokenName, extension_vega_expression_module_source, extension_vega_expression_module_index, extension_vega_expression_module_length, extension_lookahead;
var extension_TokenBooleanLiteral = 1,
  extension_TokenEOF = 2,
  extension_TokenIdentifier = 3,
  extension_TokenKeyword = 4,
  extension_TokenNullLiteral = 5,
  extension_TokenNumericLiteral = 6,
  extension_TokenPunctuator = 7,
  extension_TokenStringLiteral = 8,
  extension_TokenRegularExpression = 9;
extension_TokenName = {};
extension_TokenName[extension_TokenBooleanLiteral] = 'Boolean';
extension_TokenName[extension_TokenEOF] = '<end>';
extension_TokenName[extension_TokenIdentifier] = 'Identifier';
extension_TokenName[extension_TokenKeyword] = 'Keyword';
extension_TokenName[extension_TokenNullLiteral] = 'Null';
extension_TokenName[extension_TokenNumericLiteral] = 'Numeric';
extension_TokenName[extension_TokenPunctuator] = 'Punctuator';
extension_TokenName[extension_TokenStringLiteral] = 'String';
extension_TokenName[extension_TokenRegularExpression] = 'RegularExpression';
var extension_SyntaxArrayExpression = 'ArrayExpression',
  extension_SyntaxBinaryExpression = 'BinaryExpression',
  extension_SyntaxCallExpression = 'CallExpression',
  extension_SyntaxConditionalExpression = 'ConditionalExpression',
  extension_SyntaxIdentifier = 'Identifier',
  extension_SyntaxLiteral = 'Literal',
  extension_SyntaxLogicalExpression = 'LogicalExpression',
  extension_SyntaxMemberExpression = 'MemberExpression',
  extension_SyntaxObjectExpression = 'ObjectExpression',
  extension_SyntaxProperty = 'Property',
  extension_SyntaxUnaryExpression = 'UnaryExpression';

// Error messages should be identical to V8.
var extension_MessageUnexpectedToken = 'Unexpected token %0',
  extension_MessageUnexpectedNumber = 'Unexpected number',
  extension_MessageUnexpectedString = 'Unexpected string',
  extension_MessageUnexpectedIdentifier = 'Unexpected identifier',
  extension_MessageUnexpectedReserved = 'Unexpected reserved word',
  extension_MessageUnexpectedEOS = 'Unexpected end of input',
  extension_MessageInvalidRegExp = 'Invalid regular expression',
  extension_MessageUnterminatedRegExp = 'Invalid regular expression: missing /',
  extension_MessageStrictOctalLiteral = 'Octal literals are not allowed in strict mode.',
  extension_MessageStrictDuplicateProperty = 'Duplicate data property in object literal not allowed in strict mode';
var extension_ILLEGAL = 'ILLEGAL',
  extension_DISABLED = 'Disabled.';

// See also tools/generate-unicode-regex.py.
var extension_RegexNonAsciiIdentifierStart = new RegExp('[\\xAA\\xB5\\xBA\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u02C1\\u02C6-\\u02D1\\u02E0-\\u02E4\\u02EC\\u02EE\\u0370-\\u0374\\u0376\\u0377\\u037A-\\u037D\\u037F\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03F5\\u03F7-\\u0481\\u048A-\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0587\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0620-\\u064A\\u066E\\u066F\\u0671-\\u06D3\\u06D5\\u06E5\\u06E6\\u06EE\\u06EF\\u06FA-\\u06FC\\u06FF\\u0710\\u0712-\\u072F\\u074D-\\u07A5\\u07B1\\u07CA-\\u07EA\\u07F4\\u07F5\\u07FA\\u0800-\\u0815\\u081A\\u0824\\u0828\\u0840-\\u0858\\u08A0-\\u08B2\\u0904-\\u0939\\u093D\\u0950\\u0958-\\u0961\\u0971-\\u0980\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BD\\u09CE\\u09DC\\u09DD\\u09DF-\\u09E1\\u09F0\\u09F1\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A59-\\u0A5C\\u0A5E\\u0A72-\\u0A74\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABD\\u0AD0\\u0AE0\\u0AE1\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3D\\u0B5C\\u0B5D\\u0B5F-\\u0B61\\u0B71\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BD0\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C39\\u0C3D\\u0C58\\u0C59\\u0C60\\u0C61\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBD\\u0CDE\\u0CE0\\u0CE1\\u0CF1\\u0CF2\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D\\u0D4E\\u0D60\\u0D61\\u0D7A-\\u0D7F\\u0D85-\\u0D96\\u0D9A-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0E01-\\u0E30\\u0E32\\u0E33\\u0E40-\\u0E46\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD-\\u0EB0\\u0EB2\\u0EB3\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EDC-\\u0EDF\\u0F00\\u0F40-\\u0F47\\u0F49-\\u0F6C\\u0F88-\\u0F8C\\u1000-\\u102A\\u103F\\u1050-\\u1055\\u105A-\\u105D\\u1061\\u1065\\u1066\\u106E-\\u1070\\u1075-\\u1081\\u108E\\u10A0-\\u10C5\\u10C7\\u10CD\\u10D0-\\u10FA\\u10FC-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u1380-\\u138F\\u13A0-\\u13F4\\u1401-\\u166C\\u166F-\\u167F\\u1681-\\u169A\\u16A0-\\u16EA\\u16EE-\\u16F8\\u1700-\\u170C\\u170E-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176C\\u176E-\\u1770\\u1780-\\u17B3\\u17D7\\u17DC\\u1820-\\u1877\\u1880-\\u18A8\\u18AA\\u18B0-\\u18F5\\u1900-\\u191E\\u1950-\\u196D\\u1970-\\u1974\\u1980-\\u19AB\\u19C1-\\u19C7\\u1A00-\\u1A16\\u1A20-\\u1A54\\u1AA7\\u1B05-\\u1B33\\u1B45-\\u1B4B\\u1B83-\\u1BA0\\u1BAE\\u1BAF\\u1BBA-\\u1BE5\\u1C00-\\u1C23\\u1C4D-\\u1C4F\\u1C5A-\\u1C7D\\u1CE9-\\u1CEC\\u1CEE-\\u1CF1\\u1CF5\\u1CF6\\u1D00-\\u1DBF\\u1E00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u2071\\u207F\\u2090-\\u209C\\u2102\\u2107\\u210A-\\u2113\\u2115\\u2119-\\u211D\\u2124\\u2126\\u2128\\u212A-\\u212D\\u212F-\\u2139\\u213C-\\u213F\\u2145-\\u2149\\u214E\\u2160-\\u2188\\u2C00-\\u2C2E\\u2C30-\\u2C5E\\u2C60-\\u2CE4\\u2CEB-\\u2CEE\\u2CF2\\u2CF3\\u2D00-\\u2D25\\u2D27\\u2D2D\\u2D30-\\u2D67\\u2D6F\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u2E2F\\u3005-\\u3007\\u3021-\\u3029\\u3031-\\u3035\\u3038-\\u303C\\u3041-\\u3096\\u309D-\\u309F\\u30A1-\\u30FA\\u30FC-\\u30FF\\u3105-\\u312D\\u3131-\\u318E\\u31A0-\\u31BA\\u31F0-\\u31FF\\u3400-\\u4DB5\\u4E00-\\u9FCC\\uA000-\\uA48C\\uA4D0-\\uA4FD\\uA500-\\uA60C\\uA610-\\uA61F\\uA62A\\uA62B\\uA640-\\uA66E\\uA67F-\\uA69D\\uA6A0-\\uA6EF\\uA717-\\uA71F\\uA722-\\uA788\\uA78B-\\uA78E\\uA790-\\uA7AD\\uA7B0\\uA7B1\\uA7F7-\\uA801\\uA803-\\uA805\\uA807-\\uA80A\\uA80C-\\uA822\\uA840-\\uA873\\uA882-\\uA8B3\\uA8F2-\\uA8F7\\uA8FB\\uA90A-\\uA925\\uA930-\\uA946\\uA960-\\uA97C\\uA984-\\uA9B2\\uA9CF\\uA9E0-\\uA9E4\\uA9E6-\\uA9EF\\uA9FA-\\uA9FE\\uAA00-\\uAA28\\uAA40-\\uAA42\\uAA44-\\uAA4B\\uAA60-\\uAA76\\uAA7A\\uAA7E-\\uAAAF\\uAAB1\\uAAB5\\uAAB6\\uAAB9-\\uAABD\\uAAC0\\uAAC2\\uAADB-\\uAADD\\uAAE0-\\uAAEA\\uAAF2-\\uAAF4\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAB30-\\uAB5A\\uAB5C-\\uAB5F\\uAB64\\uAB65\\uABC0-\\uABE2\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFB00-\\uFB06\\uFB13-\\uFB17\\uFB1D\\uFB1F-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40\\uFB41\\uFB43\\uFB44\\uFB46-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB\\uFE70-\\uFE74\\uFE76-\\uFEFC\\uFF21-\\uFF3A\\uFF41-\\uFF5A\\uFF66-\\uFFBE\\uFFC2-\\uFFC7\\uFFCA-\\uFFCF\\uFFD2-\\uFFD7\\uFFDA-\\uFFDC]'),
  // eslint-disable-next-line no-misleading-character-class
  extension_RegexNonAsciiIdentifierPart = new RegExp('[\\xAA\\xB5\\xBA\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u02C1\\u02C6-\\u02D1\\u02E0-\\u02E4\\u02EC\\u02EE\\u0300-\\u0374\\u0376\\u0377\\u037A-\\u037D\\u037F\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03F5\\u03F7-\\u0481\\u0483-\\u0487\\u048A-\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0587\\u0591-\\u05BD\\u05BF\\u05C1\\u05C2\\u05C4\\u05C5\\u05C7\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0610-\\u061A\\u0620-\\u0669\\u066E-\\u06D3\\u06D5-\\u06DC\\u06DF-\\u06E8\\u06EA-\\u06FC\\u06FF\\u0710-\\u074A\\u074D-\\u07B1\\u07C0-\\u07F5\\u07FA\\u0800-\\u082D\\u0840-\\u085B\\u08A0-\\u08B2\\u08E4-\\u0963\\u0966-\\u096F\\u0971-\\u0983\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BC-\\u09C4\\u09C7\\u09C8\\u09CB-\\u09CE\\u09D7\\u09DC\\u09DD\\u09DF-\\u09E3\\u09E6-\\u09F1\\u0A01-\\u0A03\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A3C\\u0A3E-\\u0A42\\u0A47\\u0A48\\u0A4B-\\u0A4D\\u0A51\\u0A59-\\u0A5C\\u0A5E\\u0A66-\\u0A75\\u0A81-\\u0A83\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABC-\\u0AC5\\u0AC7-\\u0AC9\\u0ACB-\\u0ACD\\u0AD0\\u0AE0-\\u0AE3\\u0AE6-\\u0AEF\\u0B01-\\u0B03\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3C-\\u0B44\\u0B47\\u0B48\\u0B4B-\\u0B4D\\u0B56\\u0B57\\u0B5C\\u0B5D\\u0B5F-\\u0B63\\u0B66-\\u0B6F\\u0B71\\u0B82\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BBE-\\u0BC2\\u0BC6-\\u0BC8\\u0BCA-\\u0BCD\\u0BD0\\u0BD7\\u0BE6-\\u0BEF\\u0C00-\\u0C03\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C39\\u0C3D-\\u0C44\\u0C46-\\u0C48\\u0C4A-\\u0C4D\\u0C55\\u0C56\\u0C58\\u0C59\\u0C60-\\u0C63\\u0C66-\\u0C6F\\u0C81-\\u0C83\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBC-\\u0CC4\\u0CC6-\\u0CC8\\u0CCA-\\u0CCD\\u0CD5\\u0CD6\\u0CDE\\u0CE0-\\u0CE3\\u0CE6-\\u0CEF\\u0CF1\\u0CF2\\u0D01-\\u0D03\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D-\\u0D44\\u0D46-\\u0D48\\u0D4A-\\u0D4E\\u0D57\\u0D60-\\u0D63\\u0D66-\\u0D6F\\u0D7A-\\u0D7F\\u0D82\\u0D83\\u0D85-\\u0D96\\u0D9A-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0DCA\\u0DCF-\\u0DD4\\u0DD6\\u0DD8-\\u0DDF\\u0DE6-\\u0DEF\\u0DF2\\u0DF3\\u0E01-\\u0E3A\\u0E40-\\u0E4E\\u0E50-\\u0E59\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD-\\u0EB9\\u0EBB-\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EC8-\\u0ECD\\u0ED0-\\u0ED9\\u0EDC-\\u0EDF\\u0F00\\u0F18\\u0F19\\u0F20-\\u0F29\\u0F35\\u0F37\\u0F39\\u0F3E-\\u0F47\\u0F49-\\u0F6C\\u0F71-\\u0F84\\u0F86-\\u0F97\\u0F99-\\u0FBC\\u0FC6\\u1000-\\u1049\\u1050-\\u109D\\u10A0-\\u10C5\\u10C7\\u10CD\\u10D0-\\u10FA\\u10FC-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u135D-\\u135F\\u1380-\\u138F\\u13A0-\\u13F4\\u1401-\\u166C\\u166F-\\u167F\\u1681-\\u169A\\u16A0-\\u16EA\\u16EE-\\u16F8\\u1700-\\u170C\\u170E-\\u1714\\u1720-\\u1734\\u1740-\\u1753\\u1760-\\u176C\\u176E-\\u1770\\u1772\\u1773\\u1780-\\u17D3\\u17D7\\u17DC\\u17DD\\u17E0-\\u17E9\\u180B-\\u180D\\u1810-\\u1819\\u1820-\\u1877\\u1880-\\u18AA\\u18B0-\\u18F5\\u1900-\\u191E\\u1920-\\u192B\\u1930-\\u193B\\u1946-\\u196D\\u1970-\\u1974\\u1980-\\u19AB\\u19B0-\\u19C9\\u19D0-\\u19D9\\u1A00-\\u1A1B\\u1A20-\\u1A5E\\u1A60-\\u1A7C\\u1A7F-\\u1A89\\u1A90-\\u1A99\\u1AA7\\u1AB0-\\u1ABD\\u1B00-\\u1B4B\\u1B50-\\u1B59\\u1B6B-\\u1B73\\u1B80-\\u1BF3\\u1C00-\\u1C37\\u1C40-\\u1C49\\u1C4D-\\u1C7D\\u1CD0-\\u1CD2\\u1CD4-\\u1CF6\\u1CF8\\u1CF9\\u1D00-\\u1DF5\\u1DFC-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u200C\\u200D\\u203F\\u2040\\u2054\\u2071\\u207F\\u2090-\\u209C\\u20D0-\\u20DC\\u20E1\\u20E5-\\u20F0\\u2102\\u2107\\u210A-\\u2113\\u2115\\u2119-\\u211D\\u2124\\u2126\\u2128\\u212A-\\u212D\\u212F-\\u2139\\u213C-\\u213F\\u2145-\\u2149\\u214E\\u2160-\\u2188\\u2C00-\\u2C2E\\u2C30-\\u2C5E\\u2C60-\\u2CE4\\u2CEB-\\u2CF3\\u2D00-\\u2D25\\u2D27\\u2D2D\\u2D30-\\u2D67\\u2D6F\\u2D7F-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u2DE0-\\u2DFF\\u2E2F\\u3005-\\u3007\\u3021-\\u302F\\u3031-\\u3035\\u3038-\\u303C\\u3041-\\u3096\\u3099\\u309A\\u309D-\\u309F\\u30A1-\\u30FA\\u30FC-\\u30FF\\u3105-\\u312D\\u3131-\\u318E\\u31A0-\\u31BA\\u31F0-\\u31FF\\u3400-\\u4DB5\\u4E00-\\u9FCC\\uA000-\\uA48C\\uA4D0-\\uA4FD\\uA500-\\uA60C\\uA610-\\uA62B\\uA640-\\uA66F\\uA674-\\uA67D\\uA67F-\\uA69D\\uA69F-\\uA6F1\\uA717-\\uA71F\\uA722-\\uA788\\uA78B-\\uA78E\\uA790-\\uA7AD\\uA7B0\\uA7B1\\uA7F7-\\uA827\\uA840-\\uA873\\uA880-\\uA8C4\\uA8D0-\\uA8D9\\uA8E0-\\uA8F7\\uA8FB\\uA900-\\uA92D\\uA930-\\uA953\\uA960-\\uA97C\\uA980-\\uA9C0\\uA9CF-\\uA9D9\\uA9E0-\\uA9FE\\uAA00-\\uAA36\\uAA40-\\uAA4D\\uAA50-\\uAA59\\uAA60-\\uAA76\\uAA7A-\\uAAC2\\uAADB-\\uAADD\\uAAE0-\\uAAEF\\uAAF2-\\uAAF6\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAB30-\\uAB5A\\uAB5C-\\uAB5F\\uAB64\\uAB65\\uABC0-\\uABEA\\uABEC\\uABED\\uABF0-\\uABF9\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFB00-\\uFB06\\uFB13-\\uFB17\\uFB1D-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40\\uFB41\\uFB43\\uFB44\\uFB46-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB\\uFE00-\\uFE0F\\uFE20-\\uFE2D\\uFE33\\uFE34\\uFE4D-\\uFE4F\\uFE70-\\uFE74\\uFE76-\\uFEFC\\uFF10-\\uFF19\\uFF21-\\uFF3A\\uFF3F\\uFF41-\\uFF5A\\uFF66-\\uFFBE\\uFFC2-\\uFFC7\\uFFCA-\\uFFCF\\uFFD2-\\uFFD7\\uFFDA-\\uFFDC]');

// Ensure the condition is true, otherwise throw an error.
// This is only to have a better contract semantic, i.e. another safety net
// to catch a logic error. The condition shall be fulfilled in normal case.
// Do NOT use this to enforce a certain condition on any user input.

function extension_assert(condition, message) {
  /* istanbul ignore next */
  if (!condition) {
    throw new Error('ASSERT: ' + message);
  }
}
function extension_vega_expression_module_isDecimalDigit(ch) {
  return ch >= 0x30 && ch <= 0x39; // 0..9
}
function extension_vega_expression_module_isHexDigit(ch) {
  return '0123456789abcdefABCDEF'.includes(ch);
}
function extension_vega_expression_module_isOctalDigit(ch) {
  return '01234567'.includes(ch);
}

// 7.2 White Space

function extension_isWhiteSpace(ch) {
  return ch === 0x20 || ch === 0x09 || ch === 0x0B || ch === 0x0C || ch === 0xA0 || ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].includes(ch);
}

// 7.3 Line Terminators

function extension_isLineTerminator(ch) {
  return ch === 0x0A || ch === 0x0D || ch === 0x2028 || ch === 0x2029;
}

// 7.6 Identifier Names and Identifiers

function extension_vega_expression_module_isIdentifierStart(ch) {
  return ch === 0x24 || ch === 0x5F ||
  // $ (dollar) and _ (underscore)
  ch >= 0x41 && ch <= 0x5A ||
  // A..Z
  ch >= 0x61 && ch <= 0x7A ||
  // a..z
  ch === 0x5C ||
  // \ (backslash)
  ch >= 0x80 && extension_RegexNonAsciiIdentifierStart.test(String.fromCharCode(ch));
}
function extension_isIdentifierPart(ch) {
  return ch === 0x24 || ch === 0x5F ||
  // $ (dollar) and _ (underscore)
  ch >= 0x41 && ch <= 0x5A ||
  // A..Z
  ch >= 0x61 && ch <= 0x7A ||
  // a..z
  ch >= 0x30 && ch <= 0x39 ||
  // 0..9
  ch === 0x5C ||
  // \ (backslash)
  ch >= 0x80 && extension_RegexNonAsciiIdentifierPart.test(String.fromCharCode(ch));
}

// 7.6.1.1 Keywords

const extension_vega_expression_module_keywords = {
  'if': 1,
  'in': 1,
  'do': 1,
  'var': 1,
  'for': 1,
  'new': 1,
  'try': 1,
  'let': 1,
  'this': 1,
  'else': 1,
  'case': 1,
  'void': 1,
  'with': 1,
  'enum': 1,
  'while': 1,
  'break': 1,
  'catch': 1,
  'throw': 1,
  'const': 1,
  'yield': 1,
  'class': 1,
  'super': 1,
  'return': 1,
  'typeof': 1,
  'delete': 1,
  'switch': 1,
  'export': 1,
  'import': 1,
  'public': 1,
  'static': 1,
  'default': 1,
  'finally': 1,
  'extends': 1,
  'package': 1,
  'private': 1,
  'function': 1,
  'continue': 1,
  'debugger': 1,
  'interface': 1,
  'protected': 1,
  'instanceof': 1,
  'implements': 1
};
function extension_skipComment() {
  while (extension_vega_expression_module_index < extension_vega_expression_module_length) {
    const ch = extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index);
    if (extension_isWhiteSpace(ch) || extension_isLineTerminator(ch)) {
      ++extension_vega_expression_module_index;
    } else {
      break;
    }
  }
}
function extension_scanHexEscape(prefix) {
  var i,
    len,
    ch,
    code = 0;
  len = prefix === 'u' ? 4 : 2;
  for (i = 0; i < len; ++i) {
    if (extension_vega_expression_module_index < extension_vega_expression_module_length && extension_vega_expression_module_isHexDigit(extension_vega_expression_module_source[extension_vega_expression_module_index])) {
      ch = extension_vega_expression_module_source[extension_vega_expression_module_index++];
      code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
    } else {
      extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
    }
  }
  return String.fromCharCode(code);
}
function extension_scanUnicodeCodePointEscape() {
  var ch, code, cu1, cu2;
  ch = extension_vega_expression_module_source[extension_vega_expression_module_index];
  code = 0;

  // At least, one hex digit is required.
  if (ch === '}') {
    extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
  }
  while (extension_vega_expression_module_index < extension_vega_expression_module_length) {
    ch = extension_vega_expression_module_source[extension_vega_expression_module_index++];
    if (!extension_vega_expression_module_isHexDigit(ch)) {
      break;
    }
    code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
  }
  if (code > 0x10FFFF || ch !== '}') {
    extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
  }

  // UTF-16 Encoding
  if (code <= 0xFFFF) {
    return String.fromCharCode(code);
  }
  cu1 = (code - 0x10000 >> 10) + 0xD800;
  cu2 = (code - 0x10000 & 1023) + 0xDC00;
  return String.fromCharCode(cu1, cu2);
}
function extension_getEscapedIdentifier() {
  var ch, id;
  ch = extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index++);
  id = String.fromCharCode(ch);

  // '\u' (U+005C, U+0075) denotes an escaped character.
  if (ch === 0x5C) {
    if (extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index) !== 0x75) {
      extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
    }
    ++extension_vega_expression_module_index;
    ch = extension_scanHexEscape('u');
    if (!ch || ch === '\\' || !extension_vega_expression_module_isIdentifierStart(ch.charCodeAt(0))) {
      extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
    }
    id = ch;
  }
  while (extension_vega_expression_module_index < extension_vega_expression_module_length) {
    ch = extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index);
    if (!extension_isIdentifierPart(ch)) {
      break;
    }
    ++extension_vega_expression_module_index;
    id += String.fromCharCode(ch);

    // '\u' (U+005C, U+0075) denotes an escaped character.
    if (ch === 0x5C) {
      id = id.substr(0, id.length - 1);
      if (extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index) !== 0x75) {
        extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
      }
      ++extension_vega_expression_module_index;
      ch = extension_scanHexEscape('u');
      if (!ch || ch === '\\' || !extension_isIdentifierPart(ch.charCodeAt(0))) {
        extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
      }
      id += ch;
    }
  }
  return id;
}
function extension_getIdentifier() {
  var start, ch;
  start = extension_vega_expression_module_index++;
  while (extension_vega_expression_module_index < extension_vega_expression_module_length) {
    ch = extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index);
    if (ch === 0x5C) {
      // Blackslash (U+005C) marks Unicode escape sequence.
      extension_vega_expression_module_index = start;
      return extension_getEscapedIdentifier();
    }
    if (extension_isIdentifierPart(ch)) {
      ++extension_vega_expression_module_index;
    } else {
      break;
    }
  }
  return extension_vega_expression_module_source.slice(start, extension_vega_expression_module_index);
}
function extension_scanIdentifier() {
  var start, id, type;
  start = extension_vega_expression_module_index;

  // Backslash (U+005C) starts an escaped character.
  id = extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index) === 0x5C ? extension_getEscapedIdentifier() : extension_getIdentifier();

  // There is no keyword or literal with only one character.
  // Thus, it must be an identifier.
  if (id.length === 1) {
    type = extension_TokenIdentifier;
  } else if (extension_vega_expression_module_keywords.hasOwnProperty(id)) {
    // eslint-disable-line no-prototype-builtins
    type = extension_TokenKeyword;
  } else if (id === 'null') {
    type = extension_TokenNullLiteral;
  } else if (id === 'true' || id === 'false') {
    type = extension_TokenBooleanLiteral;
  } else {
    type = extension_TokenIdentifier;
  }
  return {
    type: type,
    value: id,
    start: start,
    end: extension_vega_expression_module_index
  };
}

// 7.7 Punctuators

function extension_scanPunctuator() {
  var start = extension_vega_expression_module_index,
    code = extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index),
    code2,
    ch1 = extension_vega_expression_module_source[extension_vega_expression_module_index],
    ch2,
    ch3,
    ch4;
  switch (code) {
    // Check for most common single-character punctuators.
    case 0x2E: // . dot
    case 0x28: // ( open bracket
    case 0x29: // ) close bracket
    case 0x3B: // ; semicolon
    case 0x2C: // , comma
    case 0x7B: // { open curly brace
    case 0x7D: // } close curly brace
    case 0x5B: // [
    case 0x5D: // ]
    case 0x3A: // :
    case 0x3F: // ?
    case 0x7E:
      // ~
      ++extension_vega_expression_module_index;
      return {
        type: extension_TokenPunctuator,
        value: String.fromCharCode(code),
        start: start,
        end: extension_vega_expression_module_index
      };
    default:
      code2 = extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index + 1);

      // '=' (U+003D) marks an assignment or comparison operator.
      if (code2 === 0x3D) {
        switch (code) {
          case 0x2B: // +
          case 0x2D: // -
          case 0x2F: // /
          case 0x3C: // <
          case 0x3E: // >
          case 0x5E: // ^
          case 0x7C: // |
          case 0x25: // %
          case 0x26: // &
          case 0x2A:
            // *
            extension_vega_expression_module_index += 2;
            return {
              type: extension_TokenPunctuator,
              value: String.fromCharCode(code) + String.fromCharCode(code2),
              start: start,
              end: extension_vega_expression_module_index
            };
          case 0x21: // !
          case 0x3D:
            // =
            extension_vega_expression_module_index += 2;

            // !== and ===
            if (extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index) === 0x3D) {
              ++extension_vega_expression_module_index;
            }
            return {
              type: extension_TokenPunctuator,
              value: extension_vega_expression_module_source.slice(start, extension_vega_expression_module_index),
              start: start,
              end: extension_vega_expression_module_index
            };
        }
      }
  }

  // 4-character punctuator: >>>=

  ch4 = extension_vega_expression_module_source.substr(extension_vega_expression_module_index, 4);
  if (ch4 === '>>>=') {
    extension_vega_expression_module_index += 4;
    return {
      type: extension_TokenPunctuator,
      value: ch4,
      start: start,
      end: extension_vega_expression_module_index
    };
  }

  // 3-character punctuators: === !== >>> <<= >>=

  ch3 = ch4.substr(0, 3);
  if (ch3 === '>>>' || ch3 === '<<=' || ch3 === '>>=') {
    extension_vega_expression_module_index += 3;
    return {
      type: extension_TokenPunctuator,
      value: ch3,
      start: start,
      end: extension_vega_expression_module_index
    };
  }

  // Other 2-character punctuators: ++ -- << >> && ||
  ch2 = ch3.substr(0, 2);
  if (ch1 === ch2[1] && '+-<>&|'.includes(ch1) || ch2 === '=>') {
    extension_vega_expression_module_index += 2;
    return {
      type: extension_TokenPunctuator,
      value: ch2,
      start: start,
      end: extension_vega_expression_module_index
    };
  }
  if (ch2 === '//') {
    extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
  }

  // 1-character punctuators: < > = ! + - * % & | ^ /

  if ('<>=!+-*%&|^/'.includes(ch1)) {
    ++extension_vega_expression_module_index;
    return {
      type: extension_TokenPunctuator,
      value: ch1,
      start: start,
      end: extension_vega_expression_module_index
    };
  }
  extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
}

// 7.8.3 Numeric Literals

function extension_scanHexLiteral(start) {
  let number = '';
  while (extension_vega_expression_module_index < extension_vega_expression_module_length) {
    if (!extension_vega_expression_module_isHexDigit(extension_vega_expression_module_source[extension_vega_expression_module_index])) {
      break;
    }
    number += extension_vega_expression_module_source[extension_vega_expression_module_index++];
  }
  if (number.length === 0) {
    extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
  }
  if (extension_vega_expression_module_isIdentifierStart(extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index))) {
    extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
  }
  return {
    type: extension_TokenNumericLiteral,
    value: parseInt('0x' + number, 16),
    start: start,
    end: extension_vega_expression_module_index
  };
}
function extension_scanOctalLiteral(start) {
  let number = '0' + extension_vega_expression_module_source[extension_vega_expression_module_index++];
  while (extension_vega_expression_module_index < extension_vega_expression_module_length) {
    if (!extension_vega_expression_module_isOctalDigit(extension_vega_expression_module_source[extension_vega_expression_module_index])) {
      break;
    }
    number += extension_vega_expression_module_source[extension_vega_expression_module_index++];
  }
  if (extension_vega_expression_module_isIdentifierStart(extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index)) || extension_vega_expression_module_isDecimalDigit(extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index))) {
    extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
  }
  return {
    type: extension_TokenNumericLiteral,
    value: parseInt(number, 8),
    octal: true,
    start: start,
    end: extension_vega_expression_module_index
  };
}
function extension_scanNumericLiteral() {
  var number, start, ch;
  ch = extension_vega_expression_module_source[extension_vega_expression_module_index];
  extension_assert(extension_vega_expression_module_isDecimalDigit(ch.charCodeAt(0)) || ch === '.', 'Numeric literal must start with a decimal digit or a decimal point');
  start = extension_vega_expression_module_index;
  number = '';
  if (ch !== '.') {
    number = extension_vega_expression_module_source[extension_vega_expression_module_index++];
    ch = extension_vega_expression_module_source[extension_vega_expression_module_index];

    // Hex number starts with '0x'.
    // Octal number starts with '0'.
    if (number === '0') {
      if (ch === 'x' || ch === 'X') {
        ++extension_vega_expression_module_index;
        return extension_scanHexLiteral(start);
      }
      if (extension_vega_expression_module_isOctalDigit(ch)) {
        return extension_scanOctalLiteral(start);
      }

      // decimal number starts with '0' such as '09' is illegal.
      if (ch && extension_vega_expression_module_isDecimalDigit(ch.charCodeAt(0))) {
        extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
      }
    }
    while (extension_vega_expression_module_isDecimalDigit(extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index))) {
      number += extension_vega_expression_module_source[extension_vega_expression_module_index++];
    }
    ch = extension_vega_expression_module_source[extension_vega_expression_module_index];
  }
  if (ch === '.') {
    number += extension_vega_expression_module_source[extension_vega_expression_module_index++];
    while (extension_vega_expression_module_isDecimalDigit(extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index))) {
      number += extension_vega_expression_module_source[extension_vega_expression_module_index++];
    }
    ch = extension_vega_expression_module_source[extension_vega_expression_module_index];
  }
  if (ch === 'e' || ch === 'E') {
    number += extension_vega_expression_module_source[extension_vega_expression_module_index++];
    ch = extension_vega_expression_module_source[extension_vega_expression_module_index];
    if (ch === '+' || ch === '-') {
      number += extension_vega_expression_module_source[extension_vega_expression_module_index++];
    }
    if (extension_vega_expression_module_isDecimalDigit(extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index))) {
      while (extension_vega_expression_module_isDecimalDigit(extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index))) {
        number += extension_vega_expression_module_source[extension_vega_expression_module_index++];
      }
    } else {
      extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
    }
  }
  if (extension_vega_expression_module_isIdentifierStart(extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index))) {
    extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
  }
  return {
    type: extension_TokenNumericLiteral,
    value: parseFloat(number),
    start: start,
    end: extension_vega_expression_module_index
  };
}

// 7.8.4 String Literals

function extension_scanStringLiteral() {
  var str = '',
    quote,
    start,
    ch,
    code,
    octal = false;
  quote = extension_vega_expression_module_source[extension_vega_expression_module_index];
  extension_assert(quote === '\'' || quote === '"', 'String literal must starts with a quote');
  start = extension_vega_expression_module_index;
  ++extension_vega_expression_module_index;
  while (extension_vega_expression_module_index < extension_vega_expression_module_length) {
    ch = extension_vega_expression_module_source[extension_vega_expression_module_index++];
    if (ch === quote) {
      quote = '';
      break;
    } else if (ch === '\\') {
      ch = extension_vega_expression_module_source[extension_vega_expression_module_index++];
      if (!ch || !extension_isLineTerminator(ch.charCodeAt(0))) {
        switch (ch) {
          case 'u':
          case 'x':
            if (extension_vega_expression_module_source[extension_vega_expression_module_index] === '{') {
              ++extension_vega_expression_module_index;
              str += extension_scanUnicodeCodePointEscape();
            } else {
              str += extension_scanHexEscape(ch);
            }
            break;
          case 'n':
            str += '\n';
            break;
          case 'r':
            str += '\r';
            break;
          case 't':
            str += '\t';
            break;
          case 'b':
            str += '\b';
            break;
          case 'f':
            str += '\f';
            break;
          case 'v':
            str += '\x0B';
            break;
          default:
            if (extension_vega_expression_module_isOctalDigit(ch)) {
              code = '01234567'.indexOf(ch);

              // \0 is not octal escape sequence
              if (code !== 0) {
                octal = true;
              }
              if (extension_vega_expression_module_index < extension_vega_expression_module_length && extension_vega_expression_module_isOctalDigit(extension_vega_expression_module_source[extension_vega_expression_module_index])) {
                octal = true;
                code = code * 8 + '01234567'.indexOf(extension_vega_expression_module_source[extension_vega_expression_module_index++]);

                // 3 digits are only allowed when string starts
                // with 0, 1, 2, 3
                if ('0123'.includes(ch) && extension_vega_expression_module_index < extension_vega_expression_module_length && extension_vega_expression_module_isOctalDigit(extension_vega_expression_module_source[extension_vega_expression_module_index])) {
                  code = code * 8 + '01234567'.indexOf(extension_vega_expression_module_source[extension_vega_expression_module_index++]);
                }
              }
              str += String.fromCharCode(code);
            } else {
              str += ch;
            }
            break;
        }
      } else {
        if (ch === '\r' && extension_vega_expression_module_source[extension_vega_expression_module_index] === '\n') {
          ++extension_vega_expression_module_index;
        }
      }
    } else if (extension_isLineTerminator(ch.charCodeAt(0))) {
      break;
    } else {
      str += ch;
    }
  }
  if (quote !== '') {
    extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
  }
  return {
    type: extension_TokenStringLiteral,
    value: str,
    octal: octal,
    start: start,
    end: extension_vega_expression_module_index
  };
}
function extension_testRegExp(pattern, flags) {
  let tmp = pattern;
  if (flags.includes('u')) {
    // Replace each astral symbol and every Unicode code point
    // escape sequence with a single ASCII symbol to avoid throwing on
    // regular expressions that are only valid in combination with the
    // `/u` flag.
    // Note: replacing with the ASCII symbol `x` might cause false
    // negatives in unlikely scenarios. For example, `[\u{61}-b]` is a
    // perfectly valid pattern that is equivalent to `[a-b]`, but it
    // would be replaced by `[x-b]` which throws an error.
    tmp = tmp.replace(/\\u\{([0-9a-fA-F]+)\}/g, ($0, $1) => {
      if (parseInt($1, 16) <= 0x10FFFF) {
        return 'x';
      }
      extension_throwError({}, extension_MessageInvalidRegExp);
    }).replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, 'x');
  }

  // First, detect invalid regular expressions.
  try {
    new RegExp(tmp);
  } catch (e) {
    extension_throwError({}, extension_MessageInvalidRegExp);
  }

  // Return a regular expression object for this pattern-flag pair, or
  // `null` in case the current environment doesn't support the flags it
  // uses.
  try {
    return new RegExp(pattern, flags);
  } catch (exception) {
    return null;
  }
}
function extension_scanRegExpBody() {
  var ch, str, classMarker, terminated, body;
  ch = extension_vega_expression_module_source[extension_vega_expression_module_index];
  extension_assert(ch === '/', 'Regular expression literal must start with a slash');
  str = extension_vega_expression_module_source[extension_vega_expression_module_index++];
  classMarker = false;
  terminated = false;
  while (extension_vega_expression_module_index < extension_vega_expression_module_length) {
    ch = extension_vega_expression_module_source[extension_vega_expression_module_index++];
    str += ch;
    if (ch === '\\') {
      ch = extension_vega_expression_module_source[extension_vega_expression_module_index++];
      // ECMA-262 7.8.5
      if (extension_isLineTerminator(ch.charCodeAt(0))) {
        extension_throwError({}, extension_MessageUnterminatedRegExp);
      }
      str += ch;
    } else if (extension_isLineTerminator(ch.charCodeAt(0))) {
      extension_throwError({}, extension_MessageUnterminatedRegExp);
    } else if (classMarker) {
      if (ch === ']') {
        classMarker = false;
      }
    } else {
      if (ch === '/') {
        terminated = true;
        break;
      } else if (ch === '[') {
        classMarker = true;
      }
    }
  }
  if (!terminated) {
    extension_throwError({}, extension_MessageUnterminatedRegExp);
  }

  // Exclude leading and trailing slash.
  body = str.substr(1, str.length - 2);
  return {
    value: body,
    literal: str
  };
}
function extension_scanRegExpFlags() {
  var ch, str, flags;
  str = '';
  flags = '';
  while (extension_vega_expression_module_index < extension_vega_expression_module_length) {
    ch = extension_vega_expression_module_source[extension_vega_expression_module_index];
    if (!extension_isIdentifierPart(ch.charCodeAt(0))) {
      break;
    }
    ++extension_vega_expression_module_index;
    if (ch === '\\' && extension_vega_expression_module_index < extension_vega_expression_module_length) {
      extension_throwError({}, extension_MessageUnexpectedToken, extension_ILLEGAL);
    } else {
      flags += ch;
      str += ch;
    }
  }
  if (flags.search(/[^gimuy]/g) >= 0) {
    extension_throwError({}, extension_MessageInvalidRegExp, flags);
  }
  return {
    value: flags,
    literal: str
  };
}
function extension_scanRegExp() {
  var start, body, flags, value;
  extension_lookahead = null;
  extension_skipComment();
  start = extension_vega_expression_module_index;
  body = extension_scanRegExpBody();
  flags = extension_scanRegExpFlags();
  value = extension_testRegExp(body.value, flags.value);
  return {
    literal: body.literal + flags.literal,
    value: value,
    regex: {
      pattern: body.value,
      flags: flags.value
    },
    start: start,
    end: extension_vega_expression_module_index
  };
}
function extension_isIdentifierName(token) {
  return token.type === extension_TokenIdentifier || token.type === extension_TokenKeyword || token.type === extension_TokenBooleanLiteral || token.type === extension_TokenNullLiteral;
}
function extension_advance() {
  extension_skipComment();
  if (extension_vega_expression_module_index >= extension_vega_expression_module_length) {
    return {
      type: extension_TokenEOF,
      start: extension_vega_expression_module_index,
      end: extension_vega_expression_module_index
    };
  }
  const ch = extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index);
  if (extension_vega_expression_module_isIdentifierStart(ch)) {
    return extension_scanIdentifier();
  }

  // Very common: ( and ) and ;
  if (ch === 0x28 || ch === 0x29 || ch === 0x3B) {
    return extension_scanPunctuator();
  }

  // String literal starts with single quote (U+0027) or double quote (U+0022).
  if (ch === 0x27 || ch === 0x22) {
    return extension_scanStringLiteral();
  }

  // Dot (.) U+002E can also start a floating-point number, hence the need
  // to check the next character.
  if (ch === 0x2E) {
    if (extension_vega_expression_module_isDecimalDigit(extension_vega_expression_module_source.charCodeAt(extension_vega_expression_module_index + 1))) {
      return extension_scanNumericLiteral();
    }
    return extension_scanPunctuator();
  }
  if (extension_vega_expression_module_isDecimalDigit(ch)) {
    return extension_scanNumericLiteral();
  }
  return extension_scanPunctuator();
}
function extension_lex() {
  const token = extension_lookahead;
  extension_vega_expression_module_index = token.end;
  extension_lookahead = extension_advance();
  extension_vega_expression_module_index = token.end;
  return token;
}
function extension_vega_expression_module_peek() {
  const pos = extension_vega_expression_module_index;
  extension_lookahead = extension_advance();
  extension_vega_expression_module_index = pos;
}
function extension_finishArrayExpression(elements) {
  const node = new extension_ASTNode(extension_SyntaxArrayExpression);
  node.elements = elements;
  return node;
}
function extension_finishBinaryExpression(operator, left, right) {
  const node = new extension_ASTNode(operator === '||' || operator === '&&' ? extension_SyntaxLogicalExpression : extension_SyntaxBinaryExpression);
  node.operator = operator;
  node.left = left;
  node.right = right;
  return node;
}
function extension_finishCallExpression(callee, args) {
  const node = new extension_ASTNode(extension_SyntaxCallExpression);
  node.callee = callee;
  node.arguments = args;
  return node;
}
function extension_finishConditionalExpression(test, consequent, alternate) {
  const node = new extension_ASTNode(extension_SyntaxConditionalExpression);
  node.test = test;
  node.consequent = consequent;
  node.alternate = alternate;
  return node;
}
function extension_finishIdentifier(name) {
  const node = new extension_ASTNode(extension_SyntaxIdentifier);
  node.name = name;
  return node;
}
function extension_finishLiteral(token) {
  const node = new extension_ASTNode(extension_SyntaxLiteral);
  node.value = token.value;
  node.raw = extension_vega_expression_module_source.slice(token.start, token.end);
  if (token.regex) {
    if (node.raw === '//') {
      node.raw = '/(?:)/';
    }
    node.regex = token.regex;
  }
  return node;
}
function extension_finishMemberExpression(accessor, object, property) {
  const node = new extension_ASTNode(extension_SyntaxMemberExpression);
  node.computed = accessor === '[';
  node.object = object;
  node.property = property;
  if (!node.computed) property.member = true;
  return node;
}
function extension_finishObjectExpression(properties) {
  const node = new extension_ASTNode(extension_SyntaxObjectExpression);
  node.properties = properties;
  return node;
}
function extension_finishProperty(kind, key, value) {
  const node = new extension_ASTNode(extension_SyntaxProperty);
  node.key = key;
  node.value = value;
  node.kind = kind;
  return node;
}
function extension_finishUnaryExpression(operator, argument) {
  const node = new extension_ASTNode(extension_SyntaxUnaryExpression);
  node.operator = operator;
  node.argument = argument;
  node.prefix = true;
  return node;
}

// Throw an exception

function extension_throwError(token, messageFormat) {
  var error,
    args = Array.prototype.slice.call(arguments, 2),
    msg = messageFormat.replace(/%(\d)/g, (whole, index) => {
      extension_assert(index < args.length, 'Message reference must be in range');
      return args[index];
    });
  error = new Error(msg);
  error.index = extension_vega_expression_module_index;
  error.description = msg;
  throw error;
}

// Throw an exception because of the token.

function extension_throwUnexpected(token) {
  if (token.type === extension_TokenEOF) {
    extension_throwError(token, extension_MessageUnexpectedEOS);
  }
  if (token.type === extension_TokenNumericLiteral) {
    extension_throwError(token, extension_MessageUnexpectedNumber);
  }
  if (token.type === extension_TokenStringLiteral) {
    extension_throwError(token, extension_MessageUnexpectedString);
  }
  if (token.type === extension_TokenIdentifier) {
    extension_throwError(token, extension_MessageUnexpectedIdentifier);
  }
  if (token.type === extension_TokenKeyword) {
    extension_throwError(token, extension_MessageUnexpectedReserved);
  }

  // BooleanLiteral, NullLiteral, or Punctuator.
  extension_throwError(token, extension_MessageUnexpectedToken, token.value);
}

// Expect the next token to match the specified punctuator.
// If not, an exception will be thrown.

function extension_expect(value) {
  const token = extension_lex();
  if (token.type !== extension_TokenPunctuator || token.value !== value) {
    extension_throwUnexpected(token);
  }
}

// Return true if the next token matches the specified punctuator.

function extension_match(value) {
  return extension_lookahead.type === extension_TokenPunctuator && extension_lookahead.value === value;
}

// Return true if the next token matches the specified keyword

function extension_matchKeyword(keyword) {
  return extension_lookahead.type === extension_TokenKeyword && extension_lookahead.value === keyword;
}

// 11.1.4 Array Initialiser

function extension_parseArrayInitialiser() {
  const elements = [];
  extension_vega_expression_module_index = extension_lookahead.start;
  extension_expect('[');
  while (!extension_match(']')) {
    if (extension_match(',')) {
      extension_lex();
      elements.push(null);
    } else {
      elements.push(extension_parseConditionalExpression());
      if (!extension_match(']')) {
        extension_expect(',');
      }
    }
  }
  extension_lex();
  return extension_finishArrayExpression(elements);
}

// 11.1.5 Object Initialiser

function extension_parseObjectPropertyKey() {
  extension_vega_expression_module_index = extension_lookahead.start;
  const token = extension_lex();

  // Note: This function is called only from parseObjectProperty(), where
  // EOF and Punctuator tokens are already filtered out.

  if (token.type === extension_TokenStringLiteral || token.type === extension_TokenNumericLiteral) {
    if (token.octal) {
      extension_throwError(token, extension_MessageStrictOctalLiteral);
    }
    return extension_finishLiteral(token);
  }
  return extension_finishIdentifier(token.value);
}
function extension_parseObjectProperty() {
  var token, key, id, value;
  extension_vega_expression_module_index = extension_lookahead.start;
  token = extension_lookahead;
  if (token.type === extension_TokenIdentifier) {
    id = extension_parseObjectPropertyKey();
    extension_expect(':');
    value = extension_parseConditionalExpression();
    return extension_finishProperty('init', id, value);
  }
  if (token.type === extension_TokenEOF || token.type === extension_TokenPunctuator) {
    extension_throwUnexpected(token);
  } else {
    key = extension_parseObjectPropertyKey();
    extension_expect(':');
    value = extension_parseConditionalExpression();
    return extension_finishProperty('init', key, value);
  }
}
function extension_parseObjectInitialiser() {
  var properties = [],
    property,
    name,
    key,
    map = {},
    toString = String;
  extension_vega_expression_module_index = extension_lookahead.start;
  extension_expect('{');
  while (!extension_match('}')) {
    property = extension_parseObjectProperty();
    if (property.key.type === extension_SyntaxIdentifier) {
      name = property.key.name;
    } else {
      name = toString(property.key.value);
    }
    key = '$' + name;
    if (Object.prototype.hasOwnProperty.call(map, key)) {
      extension_throwError({}, extension_MessageStrictDuplicateProperty);
    } else {
      map[key] = true;
    }
    properties.push(property);
    if (!extension_match('}')) {
      extension_expect(',');
    }
  }
  extension_expect('}');
  return extension_finishObjectExpression(properties);
}

// 11.1.6 The Grouping Operator

function extension_parseGroupExpression() {
  extension_expect('(');
  const expr = extension_vega_expression_module_parseExpression();
  extension_expect(')');
  return expr;
}

// 11.1 Primary Expressions

const extension_legalKeywords = {
  'if': 1
};
function extension_parsePrimaryExpression() {
  var type, token, expr;
  if (extension_match('(')) {
    return extension_parseGroupExpression();
  }
  if (extension_match('[')) {
    return extension_parseArrayInitialiser();
  }
  if (extension_match('{')) {
    return extension_parseObjectInitialiser();
  }
  type = extension_lookahead.type;
  extension_vega_expression_module_index = extension_lookahead.start;
  if (type === extension_TokenIdentifier || extension_legalKeywords[extension_lookahead.value]) {
    expr = extension_finishIdentifier(extension_lex().value);
  } else if (type === extension_TokenStringLiteral || type === extension_TokenNumericLiteral) {
    if (extension_lookahead.octal) {
      extension_throwError(extension_lookahead, extension_MessageStrictOctalLiteral);
    }
    expr = extension_finishLiteral(extension_lex());
  } else if (type === extension_TokenKeyword) {
    throw new Error(extension_DISABLED);
  } else if (type === extension_TokenBooleanLiteral) {
    token = extension_lex();
    token.value = token.value === 'true';
    expr = extension_finishLiteral(token);
  } else if (type === extension_TokenNullLiteral) {
    token = extension_lex();
    token.value = null;
    expr = extension_finishLiteral(token);
  } else if (extension_match('/') || extension_match('/=')) {
    expr = extension_finishLiteral(extension_scanRegExp());
    extension_vega_expression_module_peek();
  } else {
    extension_throwUnexpected(extension_lex());
  }
  return expr;
}

// 11.2 Left-Hand-Side Expressions

function extension_parseArguments() {
  const args = [];
  extension_expect('(');
  if (!extension_match(')')) {
    while (extension_vega_expression_module_index < extension_vega_expression_module_length) {
      args.push(extension_parseConditionalExpression());
      if (extension_match(')')) {
        break;
      }
      extension_expect(',');
    }
  }
  extension_expect(')');
  return args;
}
function extension_parseNonComputedProperty() {
  extension_vega_expression_module_index = extension_lookahead.start;
  const token = extension_lex();
  if (!extension_isIdentifierName(token)) {
    extension_throwUnexpected(token);
  }
  return extension_finishIdentifier(token.value);
}
function extension_parseNonComputedMember() {
  extension_expect('.');
  return extension_parseNonComputedProperty();
}
function extension_parseComputedMember() {
  extension_expect('[');
  const expr = extension_vega_expression_module_parseExpression();
  extension_expect(']');
  return expr;
}
function extension_parseLeftHandSideExpressionAllowCall() {
  var expr, args, property;
  expr = extension_parsePrimaryExpression();
  for (;;) {
    if (extension_match('.')) {
      property = extension_parseNonComputedMember();
      expr = extension_finishMemberExpression('.', expr, property);
    } else if (extension_match('(')) {
      args = extension_parseArguments();
      expr = extension_finishCallExpression(expr, args);
    } else if (extension_match('[')) {
      property = extension_parseComputedMember();
      expr = extension_finishMemberExpression('[', expr, property);
    } else {
      break;
    }
  }
  return expr;
}

// 11.3 Postfix Expressions

function extension_parsePostfixExpression() {
  const expr = extension_parseLeftHandSideExpressionAllowCall();
  if (extension_lookahead.type === extension_TokenPunctuator) {
    if (extension_match('++') || extension_match('--')) {
      throw new Error(extension_DISABLED);
    }
  }
  return expr;
}

// 11.4 Unary Operators

function extension_parseUnaryExpression() {
  var token, expr;
  if (extension_lookahead.type !== extension_TokenPunctuator && extension_lookahead.type !== extension_TokenKeyword) {
    expr = extension_parsePostfixExpression();
  } else if (extension_match('++') || extension_match('--')) {
    throw new Error(extension_DISABLED);
  } else if (extension_match('+') || extension_match('-') || extension_match('~') || extension_match('!')) {
    token = extension_lex();
    expr = extension_parseUnaryExpression();
    expr = extension_finishUnaryExpression(token.value, expr);
  } else if (extension_matchKeyword('delete') || extension_matchKeyword('void') || extension_matchKeyword('typeof')) {
    throw new Error(extension_DISABLED);
  } else {
    expr = extension_parsePostfixExpression();
  }
  return expr;
}
function extension_binaryPrecedence(token) {
  let prec = 0;
  if (token.type !== extension_TokenPunctuator && token.type !== extension_TokenKeyword) {
    return 0;
  }
  switch (token.value) {
    case '||':
      prec = 1;
      break;
    case '&&':
      prec = 2;
      break;
    case '|':
      prec = 3;
      break;
    case '^':
      prec = 4;
      break;
    case '&':
      prec = 5;
      break;
    case '==':
    case '!=':
    case '===':
    case '!==':
      prec = 6;
      break;
    case '<':
    case '>':
    case '<=':
    case '>=':
    case 'instanceof':
    case 'in':
      prec = 7;
      break;
    case '<<':
    case '>>':
    case '>>>':
      prec = 8;
      break;
    case '+':
    case '-':
      prec = 9;
      break;
    case '*':
    case '/':
    case '%':
      prec = 11;
      break;
  }
  return prec;
}

// 11.5 Multiplicative Operators
// 11.6 Additive Operators
// 11.7 Bitwise Shift Operators
// 11.8 Relational Operators
// 11.9 Equality Operators
// 11.10 Binary Bitwise Operators
// 11.11 Binary Logical Operators

function extension_parseBinaryExpression() {
  var marker, markers, expr, token, prec, stack, right, operator, left, i;
  marker = extension_lookahead;
  left = extension_parseUnaryExpression();
  token = extension_lookahead;
  prec = extension_binaryPrecedence(token);
  if (prec === 0) {
    return left;
  }
  token.prec = prec;
  extension_lex();
  markers = [marker, extension_lookahead];
  right = extension_parseUnaryExpression();
  stack = [left, token, right];
  while ((prec = extension_binaryPrecedence(extension_lookahead)) > 0) {
    // Reduce: make a binary expression from the three topmost entries.
    while (stack.length > 2 && prec <= stack[stack.length - 2].prec) {
      right = stack.pop();
      operator = stack.pop().value;
      left = stack.pop();
      markers.pop();
      expr = extension_finishBinaryExpression(operator, left, right);
      stack.push(expr);
    }

    // Shift.
    token = extension_lex();
    token.prec = prec;
    stack.push(token);
    markers.push(extension_lookahead);
    expr = extension_parseUnaryExpression();
    stack.push(expr);
  }

  // Final reduce to clean-up the stack.
  i = stack.length - 1;
  expr = stack[i];
  markers.pop();
  while (i > 1) {
    markers.pop();
    expr = extension_finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr);
    i -= 2;
  }
  return expr;
}

// 11.12 Conditional Operator

function extension_parseConditionalExpression() {
  var expr, consequent, alternate;
  expr = extension_parseBinaryExpression();
  if (extension_match('?')) {
    extension_lex();
    consequent = extension_parseConditionalExpression();
    extension_expect(':');
    alternate = extension_parseConditionalExpression();
    expr = extension_finishConditionalExpression(expr, consequent, alternate);
  }
  return expr;
}

// 11.14 Comma Operator

function extension_vega_expression_module_parseExpression() {
  const expr = extension_parseConditionalExpression();
  if (extension_match(',')) {
    throw new Error(extension_DISABLED); // no sequence expressions
  }
  return expr;
}
function extension_parser (code) {
  extension_vega_expression_module_source = code;
  extension_vega_expression_module_index = 0;
  extension_vega_expression_module_length = extension_vega_expression_module_source.length;
  extension_lookahead = null;
  extension_vega_expression_module_peek();
  const expr = extension_vega_expression_module_parseExpression();
  if (extension_lookahead.type !== extension_TokenEOF) {
    throw new Error('Unexpect token after expression.');
  }
  return expr;
}

var extension_Constants = {
  NaN: 'NaN',
  E: 'Math.E',
  LN2: 'Math.LN2',
  LN10: 'Math.LN10',
  LOG2E: 'Math.LOG2E',
  LOG10E: 'Math.LOG10E',
  PI: 'Math.PI',
  SQRT1_2: 'Math.SQRT1_2',
  SQRT2: 'Math.SQRT2',
  MIN_VALUE: 'Number.MIN_VALUE',
  MAX_VALUE: 'Number.MAX_VALUE'
};

function extension_Functions (codegen) {
  function fncall(name, args, cast, type) {
    let obj = codegen(args[0]);
    if (cast) {
      obj = cast + '(' + obj + ')';
      if (cast.lastIndexOf('new ', 0) === 0) obj = '(' + obj + ')';
    }
    return obj + '.' + name + (type < 0 ? '' : type === 0 ? '()' : '(' + args.slice(1).map(codegen).join(',') + ')');
  }
  function fn(name, cast, type) {
    return args => fncall(name, args, cast, type);
  }
  const DATE = 'new Date',
    STRING = 'String',
    REGEXP = 'RegExp';
  return {
    // MATH functions
    isNaN: 'Number.isNaN',
    isFinite: 'Number.isFinite',
    abs: 'Math.abs',
    acos: 'Math.acos',
    asin: 'Math.asin',
    atan: 'Math.atan',
    atan2: 'Math.atan2',
    ceil: 'Math.ceil',
    cos: 'Math.cos',
    exp: 'Math.exp',
    floor: 'Math.floor',
    hypot: 'Math.hypot',
    log: 'Math.log',
    max: 'Math.max',
    min: 'Math.min',
    pow: 'Math.pow',
    random: 'Math.random',
    round: 'Math.round',
    sin: 'Math.sin',
    sqrt: 'Math.sqrt',
    tan: 'Math.tan',
    clamp: function (args) {
      if (args.length < 3) extension_vega_util_module_error('Missing arguments to clamp function.');
      if (args.length > 3) extension_vega_util_module_error('Too many arguments to clamp function.');
      const a = args.map(codegen);
      return 'Math.max(' + a[1] + ', Math.min(' + a[2] + ',' + a[0] + '))';
    },
    // DATE functions
    now: 'Date.now',
    utc: 'Date.UTC',
    datetime: DATE,
    date: fn('getDate', DATE, 0),
    day: fn('getDay', DATE, 0),
    year: fn('getFullYear', DATE, 0),
    month: fn('getMonth', DATE, 0),
    hours: fn('getHours', DATE, 0),
    minutes: fn('getMinutes', DATE, 0),
    seconds: fn('getSeconds', DATE, 0),
    milliseconds: fn('getMilliseconds', DATE, 0),
    time: fn('getTime', DATE, 0),
    timezoneoffset: fn('getTimezoneOffset', DATE, 0),
    utcdate: fn('getUTCDate', DATE, 0),
    utcday: fn('getUTCDay', DATE, 0),
    utcyear: fn('getUTCFullYear', DATE, 0),
    utcmonth: fn('getUTCMonth', DATE, 0),
    utchours: fn('getUTCHours', DATE, 0),
    utcminutes: fn('getUTCMinutes', DATE, 0),
    utcseconds: fn('getUTCSeconds', DATE, 0),
    utcmilliseconds: fn('getUTCMilliseconds', DATE, 0),
    // sequence functions
    length: fn('length', null, -1),
    // STRING functions
    parseFloat: 'parseFloat',
    parseInt: 'parseInt',
    upper: fn('toUpperCase', STRING, 0),
    lower: fn('toLowerCase', STRING, 0),
    substring: fn('substring', STRING),
    split: fn('split', STRING),
    trim: fn('trim', STRING, 0),
    // REGEXP functions
    regexp: REGEXP,
    test: fn('test', REGEXP),
    // Control Flow functions
    if: function (args) {
      if (args.length < 3) extension_vega_util_module_error('Missing arguments to if function.');
      if (args.length > 3) extension_vega_util_module_error('Too many arguments to if function.');
      const a = args.map(codegen);
      return '(' + a[0] + '?' + a[1] + ':' + a[2] + ')';
    }
  };
}

function extension_stripQuotes(s) {
  const n = s && s.length - 1;
  return n && (s[0] === '"' && s[n] === '"' || s[0] === '\'' && s[n] === '\'') ? s.slice(1, -1) : s;
}
function extension_vega_expression_module_codegen (opt) {
  opt = opt || {};
  const allowed = opt.allowed ? extension_toSet(opt.allowed) : {},
    forbidden = opt.forbidden ? extension_toSet(opt.forbidden) : {},
    constants = opt.constants || extension_Constants,
    functions = (opt.functions || extension_Functions)(visit),
    globalvar = opt.globalvar,
    fieldvar = opt.fieldvar,
    outputGlobal = extension_vega_util_module_isFunction(globalvar) ? globalvar : id => `${globalvar}["${id}"]`;
  let globals = {},
    fields = {},
    memberDepth = 0;
  function visit(ast) {
    if (extension_vega_util_module_isString(ast)) return ast;
    const generator = Generators[ast.type];
    if (generator == null) extension_vega_util_module_error('Unsupported type: ' + ast.type);
    return generator(ast);
  }
  const Generators = {
    Literal: n => n.raw,
    Identifier: n => {
      const id = n.name;
      if (memberDepth > 0) {
        return id;
      } else if (extension_vega_util_module_has(forbidden, id)) {
        return extension_vega_util_module_error('Illegal identifier: ' + id);
      } else if (extension_vega_util_module_has(constants, id)) {
        return constants[id];
      } else if (extension_vega_util_module_has(allowed, id)) {
        return id;
      } else {
        globals[id] = 1;
        return outputGlobal(id);
      }
    },
    MemberExpression: n => {
      const d = !n.computed,
        o = visit(n.object);
      if (d) memberDepth += 1;
      const p = visit(n.property);
      if (o === fieldvar) {
        // strip quotes to sanitize field name (#1653)
        fields[extension_stripQuotes(p)] = 1;
      }
      if (d) memberDepth -= 1;
      return o + (d ? '.' + p : '[' + p + ']');
    },
    CallExpression: n => {
      if (n.callee.type !== 'Identifier') {
        extension_vega_util_module_error('Illegal callee type: ' + n.callee.type);
      }
      const callee = n.callee.name,
        args = n.arguments,
        fn = extension_vega_util_module_has(functions, callee) && functions[callee];
      if (!fn) extension_vega_util_module_error('Unrecognized function: ' + callee);
      return extension_vega_util_module_isFunction(fn) ? fn(args) : fn + '(' + args.map(visit).join(',') + ')';
    },
    ArrayExpression: n => '[' + n.elements.map(visit).join(',') + ']',
    BinaryExpression: n => '(' + visit(n.left) + ' ' + n.operator + ' ' + visit(n.right) + ')',
    UnaryExpression: n => '(' + n.operator + visit(n.argument) + ')',
    ConditionalExpression: n => '(' + visit(n.test) + '?' + visit(n.consequent) + ':' + visit(n.alternate) + ')',
    LogicalExpression: n => '(' + visit(n.left) + n.operator + visit(n.right) + ')',
    ObjectExpression: n => '{' + n.properties.map(visit).join(',') + '}',
    Property: n => {
      memberDepth += 1;
      const k = visit(n.key);
      memberDepth -= 1;
      return k + ':' + visit(n.value);
    }
  };
  function codegen(ast) {
    const result = {
      code: visit(ast),
      globals: Object.keys(globals),
      fields: Object.keys(fields)
    };
    globals = {};
    fields = {};
    return result;
  }
  codegen.functions = functions;
  codegen.constants = constants;
  return codegen;
}



;// ../../node_modules/d3-geo/src/area.js





var extension_area_areaRingSum = new extension_Adder();

// hello?

var extension_area_areaSum = new extension_Adder(),
    extension_lambda00,
    extension_phi00,
    extension_lambda0,
    extension_cosPhi0,
    extension_sinPhi0;

var extension_area_areaStream = {
  point: extension_noop_noop,
  lineStart: extension_noop_noop,
  lineEnd: extension_noop_noop,
  polygonStart: function() {
    extension_area_areaRingSum = new extension_Adder();
    extension_area_areaStream.lineStart = extension_area_areaRingStart;
    extension_area_areaStream.lineEnd = extension_area_areaRingEnd;
  },
  polygonEnd: function() {
    var areaRing = +extension_area_areaRingSum;
    extension_area_areaSum.add(areaRing < 0 ? extension_math_tau + areaRing : areaRing);
    this.lineStart = this.lineEnd = this.point = extension_noop_noop;
  },
  sphere: function() {
    extension_area_areaSum.add(extension_math_tau);
  }
};

function extension_area_areaRingStart() {
  extension_area_areaStream.point = extension_area_areaPointFirst;
}

function extension_area_areaRingEnd() {
  extension_area_areaPoint(extension_lambda00, extension_phi00);
}

function extension_area_areaPointFirst(lambda, phi) {
  extension_area_areaStream.point = extension_area_areaPoint;
  extension_lambda00 = lambda, extension_phi00 = phi;
  lambda *= extension_src_math_radians, phi *= extension_src_math_radians;
  extension_lambda0 = lambda, extension_cosPhi0 = extension_math_cos(phi = phi / 2 + extension_quarterPi), extension_sinPhi0 = extension_math_sin(phi);
}

function extension_area_areaPoint(lambda, phi) {
  lambda *= extension_src_math_radians, phi *= extension_src_math_radians;
  phi = phi / 2 + extension_quarterPi; // half the angular distance from south pole

  // Spherical excess E for a spherical triangle with vertices: south pole,
  // previous point, current point.  Uses a formula derived from Cagnoli’s
  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
  var dLambda = lambda - extension_lambda0,
      sdLambda = dLambda >= 0 ? 1 : -1,
      adLambda = sdLambda * dLambda,
      cosPhi = extension_math_cos(phi),
      sinPhi = extension_math_sin(phi),
      k = extension_sinPhi0 * sinPhi,
      u = extension_cosPhi0 * cosPhi + k * extension_math_cos(adLambda),
      v = k * sdLambda * extension_math_sin(adLambda);
  extension_area_areaRingSum.add(extension_math_atan2(v, u));

  // Advance the previous points.
  extension_lambda0 = lambda, extension_cosPhi0 = cosPhi, extension_sinPhi0 = sinPhi;
}

/* harmony default export */ function extension_d3_geo_src_area(object) {
  extension_area_areaSum = new extension_Adder();
  extension_src_stream(object, extension_area_areaStream);
  return extension_area_areaSum * 2;
}

;// ../../node_modules/d3-geo/src/bounds.js






var extension_bounds_lambda0, extension_phi0, extension_lambda1, extension_phi1, // bounds
    extension_lambda2, // previous lambda-coordinate
    extension_bounds_lambda00, extension_bounds_phi00, // first point
    extension_p0, // previous 3D point
    extension_deltaSum,
    extension_ranges,
    extension_bounds_range;

var extension_bounds_boundsStream = {
  point: extension_bounds_boundsPoint,
  lineStart: extension_boundsLineStart,
  lineEnd: extension_boundsLineEnd,
  polygonStart: function() {
    extension_bounds_boundsStream.point = extension_boundsRingPoint;
    extension_bounds_boundsStream.lineStart = extension_boundsRingStart;
    extension_bounds_boundsStream.lineEnd = extension_boundsRingEnd;
    extension_deltaSum = new extension_Adder();
    extension_area_areaStream.polygonStart();
  },
  polygonEnd: function() {
    extension_area_areaStream.polygonEnd();
    extension_bounds_boundsStream.point = extension_bounds_boundsPoint;
    extension_bounds_boundsStream.lineStart = extension_boundsLineStart;
    extension_bounds_boundsStream.lineEnd = extension_boundsLineEnd;
    if (extension_area_areaRingSum < 0) extension_bounds_lambda0 = -(extension_lambda1 = 180), extension_phi0 = -(extension_phi1 = 90);
    else if (extension_deltaSum > extension_src_math_epsilon) extension_phi1 = 90;
    else if (extension_deltaSum < -extension_src_math_epsilon) extension_phi0 = -90;
    extension_bounds_range[0] = extension_bounds_lambda0, extension_bounds_range[1] = extension_lambda1;
  },
  sphere: function() {
    extension_bounds_lambda0 = -(extension_lambda1 = 180), extension_phi0 = -(extension_phi1 = 90);
  }
};

function extension_bounds_boundsPoint(lambda, phi) {
  extension_ranges.push(extension_bounds_range = [extension_bounds_lambda0 = lambda, extension_lambda1 = lambda]);
  if (phi < extension_phi0) extension_phi0 = phi;
  if (phi > extension_phi1) extension_phi1 = phi;
}

function extension_linePoint(lambda, phi) {
  var p = extension_cartesian_cartesian([lambda * extension_src_math_radians, phi * extension_src_math_radians]);
  if (extension_p0) {
    var normal = extension_cartesianCross(extension_p0, p),
        equatorial = [normal[1], -normal[0], 0],
        inflection = extension_cartesianCross(equatorial, normal);
    extension_cartesianNormalizeInPlace(inflection);
    inflection = extension_spherical(inflection);
    var delta = lambda - extension_lambda2,
        sign = delta > 0 ? 1 : -1,
        lambdai = inflection[0] * extension_src_math_degrees * sign,
        phii,
        antimeridian = extension_math_abs(delta) > 180;
    if (antimeridian ^ (sign * extension_lambda2 < lambdai && lambdai < sign * lambda)) {
      phii = inflection[1] * extension_src_math_degrees;
      if (phii > extension_phi1) extension_phi1 = phii;
    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * extension_lambda2 < lambdai && lambdai < sign * lambda)) {
      phii = -inflection[1] * extension_src_math_degrees;
      if (phii < extension_phi0) extension_phi0 = phii;
    } else {
      if (phi < extension_phi0) extension_phi0 = phi;
      if (phi > extension_phi1) extension_phi1 = phi;
    }
    if (antimeridian) {
      if (lambda < extension_lambda2) {
        if (extension_angle(extension_bounds_lambda0, lambda) > extension_angle(extension_bounds_lambda0, extension_lambda1)) extension_lambda1 = lambda;
      } else {
        if (extension_angle(lambda, extension_lambda1) > extension_angle(extension_bounds_lambda0, extension_lambda1)) extension_bounds_lambda0 = lambda;
      }
    } else {
      if (extension_lambda1 >= extension_bounds_lambda0) {
        if (lambda < extension_bounds_lambda0) extension_bounds_lambda0 = lambda;
        if (lambda > extension_lambda1) extension_lambda1 = lambda;
      } else {
        if (lambda > extension_lambda2) {
          if (extension_angle(extension_bounds_lambda0, lambda) > extension_angle(extension_bounds_lambda0, extension_lambda1)) extension_lambda1 = lambda;
        } else {
          if (extension_angle(lambda, extension_lambda1) > extension_angle(extension_bounds_lambda0, extension_lambda1)) extension_bounds_lambda0 = lambda;
        }
      }
    }
  } else {
    extension_ranges.push(extension_bounds_range = [extension_bounds_lambda0 = lambda, extension_lambda1 = lambda]);
  }
  if (phi < extension_phi0) extension_phi0 = phi;
  if (phi > extension_phi1) extension_phi1 = phi;
  extension_p0 = p, extension_lambda2 = lambda;
}

function extension_boundsLineStart() {
  extension_bounds_boundsStream.point = extension_linePoint;
}

function extension_boundsLineEnd() {
  extension_bounds_range[0] = extension_bounds_lambda0, extension_bounds_range[1] = extension_lambda1;
  extension_bounds_boundsStream.point = extension_bounds_boundsPoint;
  extension_p0 = null;
}

function extension_boundsRingPoint(lambda, phi) {
  if (extension_p0) {
    var delta = lambda - extension_lambda2;
    extension_deltaSum.add(extension_math_abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
  } else {
    extension_bounds_lambda00 = lambda, extension_bounds_phi00 = phi;
  }
  extension_area_areaStream.point(lambda, phi);
  extension_linePoint(lambda, phi);
}

function extension_boundsRingStart() {
  extension_area_areaStream.lineStart();
}

function extension_boundsRingEnd() {
  extension_boundsRingPoint(extension_bounds_lambda00, extension_bounds_phi00);
  extension_area_areaStream.lineEnd();
  if (extension_math_abs(extension_deltaSum) > extension_src_math_epsilon) extension_bounds_lambda0 = -(extension_lambda1 = 180);
  extension_bounds_range[0] = extension_bounds_lambda0, extension_bounds_range[1] = extension_lambda1;
  extension_p0 = null;
}

// Finds the left-right distance between two longitudes.
// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
// the distance between ±180° to be 360°.
function extension_angle(lambda0, lambda1) {
  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
}

function extension_rangeCompare(a, b) {
  return a[0] - b[0];
}

function extension_rangeContains(range, x) {
  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
}

/* harmony default export */ function extension_src_bounds(feature) {
  var i, n, a, b, merged, deltaMax, delta;

  extension_phi1 = extension_lambda1 = -(extension_bounds_lambda0 = extension_phi0 = Infinity);
  extension_ranges = [];
  extension_src_stream(feature, extension_bounds_boundsStream);

  // First, sort ranges by their minimum longitudes.
  if (n = extension_ranges.length) {
    extension_ranges.sort(extension_rangeCompare);

    // Then, merge any ranges that overlap.
    for (i = 1, a = extension_ranges[0], merged = [a]; i < n; ++i) {
      b = extension_ranges[i];
      if (extension_rangeContains(a, b[0]) || extension_rangeContains(a, b[1])) {
        if (extension_angle(a[0], b[1]) > extension_angle(a[0], a[1])) a[1] = b[1];
        if (extension_angle(b[0], a[1]) > extension_angle(a[0], a[1])) a[0] = b[0];
      } else {
        merged.push(a = b);
      }
    }

    // Finally, find the largest gap between the merged ranges.
    // The final bounding box will be the inverse of this gap.
    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
      b = merged[i];
      if ((delta = extension_angle(a[1], b[0])) > deltaMax) deltaMax = delta, extension_bounds_lambda0 = b[0], extension_lambda1 = a[1];
    }
  }

  extension_ranges = extension_bounds_range = null;

  return extension_bounds_lambda0 === Infinity || extension_phi0 === Infinity
      ? [[NaN, NaN], [NaN, NaN]]
      : [[extension_bounds_lambda0, extension_phi0], [extension_lambda1, extension_phi1]];
}

;// ../../node_modules/d3-geo/src/centroid.js





var extension_W0, extension_W1,
    extension_centroid_X0, extension_centroid_Y0, extension_centroid_Z0,
    extension_centroid_X1, extension_centroid_Y1, extension_centroid_Z1,
    extension_centroid_X2, extension_centroid_Y2, extension_centroid_Z2,
    extension_centroid_lambda00, extension_centroid_phi00, // first point
    extension_src_centroid_x0, extension_src_centroid_y0, extension_z0; // previous point

var extension_centroid_centroidStream = {
  sphere: extension_noop_noop,
  point: extension_centroid_centroidPoint,
  lineStart: extension_centroid_centroidLineStart,
  lineEnd: extension_centroid_centroidLineEnd,
  polygonStart: function() {
    extension_centroid_centroidStream.lineStart = extension_centroid_centroidRingStart;
    extension_centroid_centroidStream.lineEnd = extension_centroid_centroidRingEnd;
  },
  polygonEnd: function() {
    extension_centroid_centroidStream.lineStart = extension_centroid_centroidLineStart;
    extension_centroid_centroidStream.lineEnd = extension_centroid_centroidLineEnd;
  }
};

// Arithmetic mean of Cartesian vectors.
function extension_centroid_centroidPoint(lambda, phi) {
  lambda *= extension_src_math_radians, phi *= extension_src_math_radians;
  var cosPhi = extension_math_cos(phi);
  extension_centroidPointCartesian(cosPhi * extension_math_cos(lambda), cosPhi * extension_math_sin(lambda), extension_math_sin(phi));
}

function extension_centroidPointCartesian(x, y, z) {
  ++extension_W0;
  extension_centroid_X0 += (x - extension_centroid_X0) / extension_W0;
  extension_centroid_Y0 += (y - extension_centroid_Y0) / extension_W0;
  extension_centroid_Z0 += (z - extension_centroid_Z0) / extension_W0;
}

function extension_centroid_centroidLineStart() {
  extension_centroid_centroidStream.point = extension_centroidLinePointFirst;
}

function extension_centroidLinePointFirst(lambda, phi) {
  lambda *= extension_src_math_radians, phi *= extension_src_math_radians;
  var cosPhi = extension_math_cos(phi);
  extension_src_centroid_x0 = cosPhi * extension_math_cos(lambda);
  extension_src_centroid_y0 = cosPhi * extension_math_sin(lambda);
  extension_z0 = extension_math_sin(phi);
  extension_centroid_centroidStream.point = extension_centroidLinePoint;
  extension_centroidPointCartesian(extension_src_centroid_x0, extension_src_centroid_y0, extension_z0);
}

function extension_centroidLinePoint(lambda, phi) {
  lambda *= extension_src_math_radians, phi *= extension_src_math_radians;
  var cosPhi = extension_math_cos(phi),
      x = cosPhi * extension_math_cos(lambda),
      y = cosPhi * extension_math_sin(lambda),
      z = extension_math_sin(phi),
      w = extension_math_atan2(extension_math_sqrt((w = extension_src_centroid_y0 * z - extension_z0 * y) * w + (w = extension_z0 * x - extension_src_centroid_x0 * z) * w + (w = extension_src_centroid_x0 * y - extension_src_centroid_y0 * x) * w), extension_src_centroid_x0 * x + extension_src_centroid_y0 * y + extension_z0 * z);
  extension_W1 += w;
  extension_centroid_X1 += w * (extension_src_centroid_x0 + (extension_src_centroid_x0 = x));
  extension_centroid_Y1 += w * (extension_src_centroid_y0 + (extension_src_centroid_y0 = y));
  extension_centroid_Z1 += w * (extension_z0 + (extension_z0 = z));
  extension_centroidPointCartesian(extension_src_centroid_x0, extension_src_centroid_y0, extension_z0);
}

function extension_centroid_centroidLineEnd() {
  extension_centroid_centroidStream.point = extension_centroid_centroidPoint;
}

// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
// J. Applied Mechanics 42, 239 (1975).
function extension_centroid_centroidRingStart() {
  extension_centroid_centroidStream.point = extension_centroidRingPointFirst;
}

function extension_centroid_centroidRingEnd() {
  extension_centroidRingPoint(extension_centroid_lambda00, extension_centroid_phi00);
  extension_centroid_centroidStream.point = extension_centroid_centroidPoint;
}

function extension_centroidRingPointFirst(lambda, phi) {
  extension_centroid_lambda00 = lambda, extension_centroid_phi00 = phi;
  lambda *= extension_src_math_radians, phi *= extension_src_math_radians;
  extension_centroid_centroidStream.point = extension_centroidRingPoint;
  var cosPhi = extension_math_cos(phi);
  extension_src_centroid_x0 = cosPhi * extension_math_cos(lambda);
  extension_src_centroid_y0 = cosPhi * extension_math_sin(lambda);
  extension_z0 = extension_math_sin(phi);
  extension_centroidPointCartesian(extension_src_centroid_x0, extension_src_centroid_y0, extension_z0);
}

function extension_centroidRingPoint(lambda, phi) {
  lambda *= extension_src_math_radians, phi *= extension_src_math_radians;
  var cosPhi = extension_math_cos(phi),
      x = cosPhi * extension_math_cos(lambda),
      y = cosPhi * extension_math_sin(lambda),
      z = extension_math_sin(phi),
      cx = extension_src_centroid_y0 * z - extension_z0 * y,
      cy = extension_z0 * x - extension_src_centroid_x0 * z,
      cz = extension_src_centroid_x0 * y - extension_src_centroid_y0 * x,
      m = extension_hypot(cx, cy, cz),
      w = extension_math_asin(m), // line weight = angle
      v = m && -w / m; // area weight multiplier
  extension_centroid_X2.add(v * cx);
  extension_centroid_Y2.add(v * cy);
  extension_centroid_Z2.add(v * cz);
  extension_W1 += w;
  extension_centroid_X1 += w * (extension_src_centroid_x0 + (extension_src_centroid_x0 = x));
  extension_centroid_Y1 += w * (extension_src_centroid_y0 + (extension_src_centroid_y0 = y));
  extension_centroid_Z1 += w * (extension_z0 + (extension_z0 = z));
  extension_centroidPointCartesian(extension_src_centroid_x0, extension_src_centroid_y0, extension_z0);
}

/* harmony default export */ function extension_src_centroid(object) {
  extension_W0 = extension_W1 =
  extension_centroid_X0 = extension_centroid_Y0 = extension_centroid_Z0 =
  extension_centroid_X1 = extension_centroid_Y1 = extension_centroid_Z1 = 0;
  extension_centroid_X2 = new extension_Adder();
  extension_centroid_Y2 = new extension_Adder();
  extension_centroid_Z2 = new extension_Adder();
  extension_src_stream(object, extension_centroid_centroidStream);

  var x = +extension_centroid_X2,
      y = +extension_centroid_Y2,
      z = +extension_centroid_Z2,
      m = extension_hypot(x, y, z);

  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
  if (m < extension_math_epsilon2) {
    x = extension_centroid_X1, y = extension_centroid_Y1, z = extension_centroid_Z1;
    // If the feature has zero length, fall back to arithmetic mean of point vectors.
    if (extension_W1 < extension_src_math_epsilon) x = extension_centroid_X0, y = extension_centroid_Y0, z = extension_centroid_Z0;
    m = extension_hypot(x, y, z);
    // If the feature still has an undefined ccentroid, then return.
    if (m < extension_math_epsilon2) return [NaN, NaN];
  }

  return [extension_math_atan2(y, x) * extension_src_math_degrees, extension_math_asin(z / m) * extension_src_math_degrees];
}

;// ../../node_modules/d3-array/src/union.js


function extension_union_union(...others) {
  const set = new extension_InternSet();
  for (const other of others) {
    for (const o of other) {
      set.add(o);
    }
  }
  return set;
}

;// ../../node_modules/d3-array/src/intersection.js


function extension_intersection(values, ...others) {
  values = new extension_InternSet(values);
  others = others.map(extension_intersection_set);
  out: for (const value of values) {
    for (const other of others) {
      if (!other.has(value)) {
        values.delete(value);
        continue out;
      }
    }
  }
  return values;
}

function extension_intersection_set(values) {
  return values instanceof extension_InternSet ? values : new extension_InternSet(values);
}

;// ../../node_modules/vega-selections/build/vega-selection.module.js




// Registers vega-util field accessors to protect against XSS attacks
const extension_SELECTION_GETTER = Symbol('vega_selection_getter');
function extension_vega_selection_module_getter(f) {
  if (!f.getter || !f.getter[extension_SELECTION_GETTER]) {
    f.getter = extension_vega_util_module_field(f.field);
    f.getter[extension_SELECTION_GETTER] = true;
  }
  return f.getter;
}
const extension_Intersect = 'intersect';
const extension_vega_selection_module_Union = 'union';
const extension_VlMulti = 'vlMulti';
const extension_VlPoint = 'vlPoint';
const extension_vega_selection_module_Or = 'or';
const extension_vega_selection_module_And = 'and';
const extension_SelectionId = '_vgsid_';
const extension_$selectionId = extension_vega_util_module_field(extension_SelectionId);

const extension_TYPE_ENUM = 'E',
  extension_TYPE_RANGE_INC = 'R',
  extension_TYPE_RANGE_EXC = 'R-E',
  extension_TYPE_RANGE_LE = 'R-LE',
  extension_TYPE_RANGE_RE = 'R-RE',
  extension_UNIT_INDEX = 'index:unit';

// TODO: revisit date coercion?
function extension_testPoint(datum, entry) {
  var fields = entry.fields,
    values = entry.values,
    n = fields.length,
    i = 0,
    dval,
    f;
  for (; i < n; ++i) {
    f = fields[i];
    dval = extension_vega_selection_module_getter(f)(datum);
    if (extension_isDate(dval)) dval = extension_toNumber(dval);
    if (extension_isDate(values[i])) values[i] = extension_toNumber(values[i]);
    if (extension_vega_util_module_isArray(values[i]) && extension_isDate(values[i][0])) values[i] = values[i].map(extension_toNumber);
    if (f.type === extension_TYPE_ENUM) {
      // Enumerated fields can either specify individual values (single/multi selections)
      // or an array of values (interval selections).
      if (extension_vega_util_module_isArray(values[i]) ? values[i].indexOf(dval) < 0 : dval !== values[i]) {
        return false;
      }
    } else {
      if (f.type === extension_TYPE_RANGE_INC) {
        if (!extension_inrange(dval, values[i])) return false;
      } else if (f.type === extension_TYPE_RANGE_RE) {
        // Discrete selection of bins test within the range [bin_start, bin_end).
        if (!extension_inrange(dval, values[i], true, false)) return false;
      } else if (f.type === extension_TYPE_RANGE_EXC) {
        // 'R-E'/'R-LE' included for completeness.
        if (!extension_inrange(dval, values[i], false, false)) return false;
      } else if (f.type === extension_TYPE_RANGE_LE) {
        if (!extension_inrange(dval, values[i], false, true)) return false;
      }
    }
  }
  return true;
}

/**
 * Tests if a tuple is contained within an interactive selection.
 * @param {string} name - The name of the data set representing the selection.
 *  Tuples in the dataset are of the form
 *  {unit: string, fields: array<fielddef>, values: array<*>}.
 *  Fielddef is of the form
 *  {field: string, channel: string, type: 'E' | 'R'} where
 *  'type' identifies whether tuples in the dataset enumerate
 *  values for the field, or specify a continuous range.
 * @param {object} datum - The tuple to test for inclusion.
 * @param {string} op - The set operation for combining selections.
 *   One of 'intersect' or 'union' (default).
 * @return {boolean} - True if the datum is in the selection, false otherwise.
 */
function extension_selectionTest(name, datum, op) {
  var data = this.context.data[name],
    entries = data ? data.values.value : [],
    unitIdx = data ? data[extension_UNIT_INDEX] && data[extension_UNIT_INDEX].value : undefined,
    intersect = op === extension_Intersect,
    n = entries.length,
    i = 0,
    entry,
    miss,
    count,
    unit,
    b;
  for (; i < n; ++i) {
    entry = entries[i];
    if (unitIdx && intersect) {
      // multi selections union within the same unit and intersect across units.
      miss = miss || {};
      count = miss[unit = entry.unit] || 0;

      // if we've already matched this unit, skip.
      if (count === -1) continue;
      b = extension_testPoint(datum, entry);
      miss[unit] = b ? -1 : ++count;

      // if we match and there are no other units return true
      // if we've missed against all tuples in this unit return false
      if (b && unitIdx.size === 1) return true;
      if (!b && count === unitIdx.get(unit).count) return false;
    } else {
      b = extension_testPoint(datum, entry);

      // if we find a miss and we do require intersection return false
      // if we find a match and we don't require intersection return true
      if (intersect ^ b) return b;
    }
  }

  // if intersecting and we made it here, then we saw no misses
  // if not intersecting, then we saw no matches
  // if no active selections, return false
  return n && intersect;
}
const extension_vega_selection_module_bisect = extension_bisector_bisector(extension_$selectionId),
  extension_vega_selection_module_bisectLeft = extension_vega_selection_module_bisect.left,
  extension_vega_selection_module_bisectRight = extension_vega_selection_module_bisect.right;
function extension_selectionIdTest(name, datum, op) {
  const data = this.context.data[name],
    entries = data ? data.values.value : [],
    unitIdx = data ? data[extension_UNIT_INDEX] && data[extension_UNIT_INDEX].value : undefined,
    intersect = op === extension_Intersect,
    value = extension_$selectionId(datum),
    index = extension_vega_selection_module_bisectLeft(entries, value);
  if (index === entries.length) return false;
  if (extension_$selectionId(entries[index]) !== value) return false;
  if (unitIdx && intersect) {
    if (unitIdx.size === 1) return true;
    if (extension_vega_selection_module_bisectRight(entries, value) - index < unitIdx.size) return false;
  }
  return true;
}

/**
 * Maps an array of scene graph items to an array of selection tuples.
 * @param {string} name  - The name of the dataset representing the selection.
 * @param {string} base  - The base object that generated tuples extend.
 *
 * @returns {array} An array of selection entries for the given unit.
 */
function extension_selectionTuples(array, base) {
  return array.map(x => extension_extend(base.fields ? {
    values: base.fields.map(f => extension_vega_selection_module_getter(f)(x.datum))
  } : {
    [extension_SelectionId]: extension_$selectionId(x.datum)
  }, base));
}

/**
 * Resolves selection for use as a scale domain or reads via the API.
 * @param {string} name - The name of the dataset representing the selection
 * @param {string} [op='union'] - The set operation for combining selections.
 *                 One of 'intersect' or 'union' (default).
 * @param {boolean} isMulti - Identifies a "multi" selection to perform more
 *                 expensive resolution computation.
 * @param {boolean} vl5 - With Vega-Lite v5, "multi" selections are now called "point"
 *                 selections, and thus the resolved tuple should reflect this name.
 *                 This parameter allows us to reflect this change without triggering
 *                 a major version bump for Vega.
 * @returns {object} An object of selected fields and values.
 */
function extension_selectionResolve(name, op, isMulti, vl5) {
  var data = this.context.data[name],
    entries = data ? data.values.value : [],
    resolved = {},
    multiRes = {},
    types = {},
    entry,
    fields,
    values,
    unit,
    field,
    value,
    res,
    resUnit,
    type,
    union,
    n = entries.length,
    i = 0,
    j,
    m;

  // First union all entries within the same unit.
  for (; i < n; ++i) {
    entry = entries[i];
    unit = entry.unit;
    fields = entry.fields;
    values = entry.values;
    if (fields && values) {
      // Intentional selection stores
      for (j = 0, m = fields.length; j < m; ++j) {
        field = fields[j];
        res = resolved[field.field] || (resolved[field.field] = {});
        resUnit = res[unit] || (res[unit] = []);
        types[field.field] = type = field.type.charAt(0);
        union = extension_vega_selection_module_ops[`${type}_union`];
        res[unit] = union(resUnit, extension_vega_util_module_array(values[j]));
      }

      // If the same multi-selection is repeated over views and projected over
      // an encoding, it may operate over different fields making it especially
      // tricky to reliably resolve it. At best, we can de-dupe identical entries
      // but doing so may be more computationally expensive than it is worth.
      // Instead, for now, we simply transform our store representation into
      // a more human-friendly one.
      if (isMulti) {
        resUnit = multiRes[unit] || (multiRes[unit] = []);
        resUnit.push(extension_vega_util_module_array(values).reduce((obj, curr, j) => (obj[fields[j].field] = curr, obj), {}));
      }
    } else {
      // Short circuit extensional selectionId stores which hold sorted IDs unique to each unit.
      field = extension_SelectionId;
      value = extension_$selectionId(entry);
      res = resolved[field] || (resolved[field] = {});
      resUnit = res[unit] || (res[unit] = []);
      resUnit.push(value);
      if (isMulti) {
        resUnit = multiRes[unit] || (multiRes[unit] = []);
        resUnit.push({
          [extension_SelectionId]: value
        });
      }
    }
  }

  // Then resolve fields across units as per the op.
  op = op || extension_vega_selection_module_Union;
  if (resolved[extension_SelectionId]) {
    resolved[extension_SelectionId] = extension_vega_selection_module_ops[`${extension_SelectionId}_${op}`](...Object.values(resolved[extension_SelectionId]));
  } else {
    Object.keys(resolved).forEach(field => {
      resolved[field] = Object.keys(resolved[field]).map(unit => resolved[field][unit]).reduce((acc, curr) => acc === undefined ? curr : extension_vega_selection_module_ops[`${types[field]}_${op}`](acc, curr));
    });
  }
  entries = Object.keys(multiRes);
  if (isMulti && entries.length) {
    const key = vl5 ? extension_VlPoint : extension_VlMulti;
    resolved[key] = op === extension_vega_selection_module_Union ? {
      [extension_vega_selection_module_Or]: entries.reduce((acc, k) => (acc.push(...multiRes[k]), acc), [])
    } : {
      [extension_vega_selection_module_And]: entries.map(k => ({
        [extension_vega_selection_module_Or]: multiRes[k]
      }))
    };
  }
  return resolved;
}
var extension_vega_selection_module_ops = {
  [`${extension_SelectionId}_union`]: extension_union_union,
  [`${extension_SelectionId}_intersect`]: extension_intersection,
  E_union: function (base, value) {
    if (!base.length) return value;
    var i = 0,
      n = value.length;
    for (; i < n; ++i) if (base.indexOf(value[i]) < 0) base.push(value[i]);
    return base;
  },
  E_intersect: function (base, value) {
    return !base.length ? value : base.filter(v => value.indexOf(v) >= 0);
  },
  R_union: function (base, value) {
    var lo = extension_toNumber(value[0]),
      hi = extension_toNumber(value[1]);
    if (lo > hi) {
      lo = value[1];
      hi = value[0];
    }
    if (!base.length) return [lo, hi];
    if (base[0] > lo) base[0] = lo;
    if (base[1] < hi) base[1] = hi;
    return base;
  },
  R_intersect: function (base, value) {
    var lo = extension_toNumber(value[0]),
      hi = extension_toNumber(value[1]);
    if (lo > hi) {
      lo = value[1];
      hi = value[0];
    }
    if (!base.length) return [lo, hi];
    if (hi < base[0] || base[1] < lo) {
      return [];
    } else {
      if (base[0] < lo) base[0] = lo;
      if (base[1] > hi) base[1] = hi;
    }
    return base;
  }
};

const extension_DataPrefix = ':',
  extension_IndexPrefix = '@';
function extension_selectionVisitor(name, args, scope, params) {
  if (args[0].type !== extension_vega_expression_module_Literal) extension_vega_util_module_error('First argument to selection functions must be a string literal.');
  const data = args[0].value,
    op = args.length >= 2 && extension_peek(args).value,
    field = 'unit',
    indexName = extension_IndexPrefix + field,
    dataName = extension_DataPrefix + data;

  // eslint-disable-next-line no-prototype-builtins
  if (op === extension_Intersect && !extension_vega_util_module_has(params, indexName)) {
    params[indexName] = scope.getData(data).indataRef(scope, field);
  }

  // eslint-disable-next-line no-prototype-builtins
  if (!extension_vega_util_module_has(params, dataName)) {
    params[dataName] = scope.getData(data).tuplesRef();
  }
}



;// ../../node_modules/vega-functions/build/vega-functions.module.js












function extension_vega_functions_module_data(name) {
  const data = this.context.data[name];
  return data ? data.values.value : [];
}
function extension_indata(name, field, value) {
  const index = this.context.data[name]['index:' + field],
    entry = index ? index.value.get(value) : undefined;
  return entry ? entry.count : entry;
}
function extension_setdata(name, tuples) {
  const df = this.context.dataflow,
    data = this.context.data[name],
    input = data.input;
  df.pulse(input, df.changeset().remove(extension_truthy).insert(tuples));
  return 1;
}

function extension_vega_functions_module_encode (item, name, retval) {
  if (item) {
    const df = this.context.dataflow,
      target = item.mark.source;
    df.pulse(target, df.changeset().encode(item, name));
  }
  return retval !== undefined ? retval : item;
}

const extension_vega_functions_module_wrap = method => function (value, spec) {
  const locale = this.context.dataflow.locale();
  return value === null ? 'null' : locale[method](spec)(value);
};
const extension_vega_functions_module_format = extension_vega_functions_module_wrap('format');
const extension_vega_functions_module_timeFormat = extension_vega_functions_module_wrap('timeFormat');
const extension_vega_functions_module_utcFormat = extension_vega_functions_module_wrap('utcFormat');
const extension_vega_functions_module_timeParse = extension_vega_functions_module_wrap('timeParse');
const extension_vega_functions_module_utcParse = extension_vega_functions_module_wrap('utcParse');
const extension_dateObj = new Date(2000, 0, 1);
function extension_vega_functions_module_time(month, day, specifier) {
  if (!Number.isInteger(month) || !Number.isInteger(day)) return '';
  extension_dateObj.setYear(2000);
  extension_dateObj.setMonth(month);
  extension_dateObj.setDate(day);
  return extension_vega_functions_module_timeFormat.call(this, extension_dateObj, specifier);
}
function extension_monthFormat(month) {
  return extension_vega_functions_module_time.call(this, month, 1, '%B');
}
function extension_monthAbbrevFormat(month) {
  return extension_vega_functions_module_time.call(this, month, 1, '%b');
}
function extension_dayFormat(day) {
  return extension_vega_functions_module_time.call(this, 0, 2 + day, '%A');
}
function extension_dayAbbrevFormat(day) {
  return extension_vega_functions_module_time.call(this, 0, 2 + day, '%a');
}

const extension_vega_functions_module_DataPrefix = ':';
const extension_vega_functions_module_IndexPrefix = '@';
const extension_ScalePrefix = '%';
const extension_SignalPrefix = '$';

function extension_dataVisitor(name, args, scope, params) {
  if (args[0].type !== extension_vega_expression_module_Literal) {
    extension_vega_util_module_error('First argument to data functions must be a string literal.');
  }
  const data = args[0].value,
    dataName = extension_vega_functions_module_DataPrefix + data;
  if (!extension_vega_util_module_has(dataName, params)) {
    try {
      params[dataName] = scope.getData(data).tuplesRef();
    } catch (err) {
      // if data set does not exist, there's nothing to track
    }
  }
}
function extension_indataVisitor(name, args, scope, params) {
  if (args[0].type !== extension_vega_expression_module_Literal) extension_vega_util_module_error('First argument to indata must be a string literal.');
  if (args[1].type !== extension_vega_expression_module_Literal) extension_vega_util_module_error('Second argument to indata must be a string literal.');
  const data = args[0].value,
    field = args[1].value,
    indexName = extension_vega_functions_module_IndexPrefix + field;
  if (!extension_vega_util_module_has(indexName, params)) {
    params[indexName] = scope.getData(data).indataRef(scope, field);
  }
}
function extension_scaleVisitor(name, args, scope, params) {
  if (args[0].type === extension_vega_expression_module_Literal) {
    // add scale dependency
    extension_addScaleDependency(scope, params, args[0].value);
  } else {
    // indirect scale lookup; add all scales as parameters
    for (name in scope.scales) {
      extension_addScaleDependency(scope, params, name);
    }
  }
}
function extension_addScaleDependency(scope, params, name) {
  const scaleName = extension_ScalePrefix + name;
  if (!extension_vega_util_module_has(params, scaleName)) {
    try {
      params[scaleName] = scope.scaleRef(name);
    } catch (err) {
      // TODO: error handling? warning?
    }
  }
}

function extension_getScale(nameOrFunction, ctx) {
  if (extension_vega_util_module_isFunction(nameOrFunction)) {
    return nameOrFunction;
  }
  if (extension_vega_util_module_isString(nameOrFunction)) {
    const maybeScale = ctx.scales[nameOrFunction];
    return maybeScale && extension_isRegisteredScale(maybeScale.value) ? maybeScale.value : undefined;
  }
  return undefined;
}
function extension_internalScaleFunctions(codegen, fnctx, visitors) {
  // add helper method to the 'this' expression function context
  fnctx.__bandwidth = s => s && s.bandwidth ? s.bandwidth() : 0;

  // register AST visitors for internal scale functions
  visitors._bandwidth = extension_scaleVisitor;
  visitors._range = extension_scaleVisitor;
  visitors._scale = extension_scaleVisitor;

  // resolve scale reference directly to the signal hash argument
  const ref = arg => '_[' + (arg.type === extension_vega_expression_module_Literal ? extension_$(extension_ScalePrefix + arg.value) : extension_$(extension_ScalePrefix) + '+' + codegen(arg)) + ']';

  // define and return internal scale function code generators
  // these internal functions are called by mark encoders
  return {
    _bandwidth: args => `this.__bandwidth(${ref(args[0])})`,
    _range: args => `${ref(args[0])}.range()`,
    _scale: args => `${ref(args[0])}(${codegen(args[1])})`
  };
}

function extension_geoMethod(methodName, globalMethod) {
  return function (projection, geojson, group) {
    if (projection) {
      // projection defined, use it
      const p = extension_getScale(projection, (group || this).context);
      return p && p.path[methodName](geojson);
    } else {
      // projection undefined, use global method
      return globalMethod(geojson);
    }
  };
}
const extension_geoArea = extension_geoMethod('area', extension_d3_geo_src_area);
const extension_geoBounds = extension_geoMethod('bounds', extension_src_bounds);
const extension_geoCentroid = extension_geoMethod('centroid', extension_src_centroid);
function extension_geoScale(projection, group) {
  const p = extension_getScale(projection, (group || this).context);
  return p && p.scale();
}

function extension_inScope (item) {
  const group = this.context.group;
  let value = false;
  if (group) while (item) {
    if (item === group) {
      value = true;
      break;
    }
    item = item.mark.group;
  }
  return value;
}

function extension_vega_functions_module_log(df, method, args) {
  try {
    df[method].apply(df, ['EXPRESSION'].concat([].slice.call(args)));
  } catch (err) {
    df.warn(err);
  }
  return args[args.length - 1];
}
function extension_warn() {
  return extension_vega_functions_module_log(this.context.dataflow, 'warn', arguments);
}
function extension_info() {
  return extension_vega_functions_module_log(this.context.dataflow, 'info', arguments);
}
function extension_vega_functions_module_debug() {
  return extension_vega_functions_module_log(this.context.dataflow, 'debug', arguments);
}

// https://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef
function extension_channel_luminance_value(channelValue) {
  const val = channelValue / 255;
  if (val <= 0.03928) {
    return val / 12.92;
  }
  return Math.pow((val + 0.055) / 1.055, 2.4);
}
function extension_luminance(color) {
  const c = extension_color_rgb(color),
    r = extension_channel_luminance_value(c.r),
    g = extension_channel_luminance_value(c.g),
    b = extension_channel_luminance_value(c.b);
  return 0.2126 * r + 0.7152 * g + 0.0722 * b;
}

// https://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef
function extension_contrast(color1, color2) {
  const lum1 = extension_luminance(color1),
    lum2 = extension_luminance(color2),
    lumL = Math.max(lum1, lum2),
    lumD = Math.min(lum1, lum2);
  return (lumL + 0.05) / (lumD + 0.05);
}

function extension_vega_functions_module_merge () {
  const args = [].slice.call(arguments);
  args.unshift({});
  return extension_extend(...args);
}

function extension_vega_functions_module_equal(a, b) {
  return a === b || a !== a && b !== b ? true : extension_vega_util_module_isArray(a) ? extension_vega_util_module_isArray(b) && a.length === b.length ? extension_equalArray(a, b) : false : extension_vega_util_module_isObject(a) && extension_vega_util_module_isObject(b) ? extension_equalObject(a, b) : false;
}
function extension_equalArray(a, b) {
  for (let i = 0, n = a.length; i < n; ++i) {
    if (!extension_vega_functions_module_equal(a[i], b[i])) return false;
  }
  return true;
}
function extension_equalObject(a, b) {
  for (const key in a) {
    if (!extension_vega_functions_module_equal(a[key], b[key])) return false;
  }
  return true;
}
function extension_removePredicate(props) {
  return _ => extension_equalObject(props, _);
}
function extension_modify (name, insert, remove, toggle, modify, values) {
  const df = this.context.dataflow,
    data = this.context.data[name],
    input = data.input,
    stamp = df.stamp();
  let changes = data.changes,
    predicate,
    key;
  if (df._trigger === false || !(input.value.length || insert || toggle)) {
    // nothing to do!
    return 0;
  }
  if (!changes || changes.stamp < stamp) {
    data.changes = changes = df.changeset();
    changes.stamp = stamp;
    df.runAfter(() => {
      data.modified = true;
      df.pulse(input, changes).run();
    }, true, 1);
  }
  if (remove) {
    predicate = remove === true ? extension_truthy : extension_vega_util_module_isArray(remove) || extension_isTuple(remove) ? remove : extension_removePredicate(remove);
    changes.remove(predicate);
  }
  if (insert) {
    changes.insert(insert);
  }
  if (toggle) {
    predicate = extension_removePredicate(toggle);
    if (input.value.some(predicate)) {
      changes.remove(predicate);
    } else {
      changes.insert(toggle);
    }
  }
  if (modify) {
    for (key in values) {
      changes.modify(modify, key, values[key]);
    }
  }
  return 1;
}

function extension_pinchDistance(event) {
  const t = event.touches,
    dx = t[0].clientX - t[1].clientX,
    dy = t[0].clientY - t[1].clientY;
  return Math.hypot(dx, dy);
}
function extension_pinchAngle(event) {
  const t = event.touches;
  return Math.atan2(t[0].clientY - t[1].clientY, t[0].clientX - t[1].clientX);
}

// memoize accessor functions
const extension_accessors = {};
function extension_pluck (data, name) {
  const accessor = extension_accessors[name] || (extension_accessors[name] = extension_vega_util_module_field(name));
  return extension_vega_util_module_isArray(data) ? data.map(accessor) : accessor(data);
}

function extension_vega_functions_module_array(seq) {
  return extension_vega_util_module_isArray(seq) || ArrayBuffer.isView(seq) ? seq : null;
}
function extension_vega_functions_module_sequence(seq) {
  return extension_vega_functions_module_array(seq) || (extension_vega_util_module_isString(seq) ? seq : null);
}
function extension_vega_functions_module_join(seq) {
  for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
    args[_key - 1] = arguments[_key];
  }
  return extension_vega_functions_module_array(seq).join(...args);
}
function extension_indexof(seq) {
  for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
    args[_key2 - 1] = arguments[_key2];
  }
  return extension_vega_functions_module_sequence(seq).indexOf(...args);
}
function extension_lastindexof(seq) {
  for (var _len3 = arguments.length, args = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
    args[_key3 - 1] = arguments[_key3];
  }
  return extension_vega_functions_module_sequence(seq).lastIndexOf(...args);
}
function extension_vega_functions_module_slice(seq) {
  for (var _len4 = arguments.length, args = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
    args[_key4 - 1] = arguments[_key4];
  }
  return extension_vega_functions_module_sequence(seq).slice(...args);
}
function extension_vega_functions_module_replace(str, pattern, repl) {
  if (extension_vega_util_module_isFunction(repl)) extension_vega_util_module_error('Function argument passed to replace.');
  return String(str).replace(pattern, repl);
}
function extension_vega_functions_module_reverse(seq) {
  return extension_vega_functions_module_array(seq).slice().reverse();
}

function extension_bandspace(count, paddingInner, paddingOuter) {
  return extension_bandSpace(count || 0, paddingInner || 0, paddingOuter || 0);
}
function extension_bandwidth(name, group) {
  const s = extension_getScale(name, (group || this).context);
  return s && s.bandwidth ? s.bandwidth() : 0;
}
function extension_vega_functions_module_copy(name, group) {
  const s = extension_getScale(name, (group || this).context);
  return s ? s.copy() : undefined;
}
function extension_domain(name, group) {
  const s = extension_getScale(name, (group || this).context);
  return s ? s.domain() : [];
}
function extension_invert(name, range, group) {
  const s = extension_getScale(name, (group || this).context);
  return !s ? undefined : extension_vega_util_module_isArray(range) ? (s.invertRange || s.invert)(range) : (s.invert || s.invertExtent)(range);
}
function extension_vega_functions_module_range(name, group) {
  const s = extension_getScale(name, (group || this).context);
  return s && s.range ? s.range() : [];
}
function extension_vega_functions_module_scale(name, value, group) {
  const s = extension_getScale(name, (group || this).context);
  return s ? s(value) : undefined;
}

function extension_scaleGradient (scale, p0, p1, count, group) {
  scale = extension_getScale(scale, (group || this).context);
  const gradient = extension_Gradient(p0, p1);
  let stops = scale.domain(),
    min = stops[0],
    max = extension_peek(stops),
    fraction = extension_vega_util_module_identity;
  if (!(max - min)) {
    // expand scale if domain has zero span, fix #1479
    scale = (scale.interpolator ? extension_vega_scale_module_scale('sequential')().interpolator(scale.interpolator()) : extension_vega_scale_module_scale('linear')().interpolate(scale.interpolate()).range(scale.range())).domain([min = 0, max = 1]);
  } else {
    fraction = extension_scaleFraction(scale, min, max);
  }
  if (scale.ticks) {
    stops = scale.ticks(+count || 15);
    if (min !== stops[0]) stops.unshift(min);
    if (max !== extension_peek(stops)) stops.push(max);
  }
  stops.forEach(_ => gradient.stop(fraction(_), scale(_)));
  return gradient;
}

function extension_geoShape(projection, geojson, group) {
  const p = extension_getScale(projection, (group || this).context);
  return function (context) {
    return p ? p.path.context(context)(geojson) : '';
  };
}
function extension_pathShape(path) {
  let p = null;
  return function (context) {
    return context ? extension_pathRender(context, p = p || extension_vega_scenegraph_module_parse(path)) : path;
  };
}

const extension_datum = d => d.data;
function extension_treeNodes(name, context) {
  const tree = extension_vega_functions_module_data.call(context, name);
  return tree.root && tree.root.lookup || {};
}
function extension_treePath(name, source, target) {
  const nodes = extension_treeNodes(name, this),
    s = nodes[source],
    t = nodes[target];
  return s && t ? s.path(t).map(extension_datum) : undefined;
}
function extension_treeAncestors(name, node) {
  const n = extension_treeNodes(name, this)[node];
  return n ? n.ancestors().map(extension_datum) : undefined;
}

const extension_window = () => typeof window !== 'undefined' && window || null;
function extension_screen() {
  const w = extension_window();
  return w ? w.screen : {};
}
function extension_windowSize() {
  const w = extension_window();
  return w ? [w.innerWidth, w.innerHeight] : [undefined, undefined];
}
function extension_containerSize() {
  const view = this.context.dataflow,
    el = view.container && view.container();
  return el ? [el.clientWidth, el.clientHeight] : [undefined, undefined];
}

function extension_vega_functions_module_intersect (b, opt, group) {
  if (!b) return [];
  const [u, v] = b,
    box = new extension_Bounds().set(u[0], u[1], v[0], v[1]),
    scene = group || this.context.dataflow.scenegraph().root;
  return extension_vega_scenegraph_module_intersect(scene, box, extension_vega_functions_module_filter(opt));
}
function extension_vega_functions_module_filter(opt) {
  let p = null;
  if (opt) {
    const types = extension_vega_util_module_array(opt.marktype),
      names = extension_vega_util_module_array(opt.markname);
    p = _ => (!types.length || types.some(t => _.marktype === t)) && (!names.length || names.some(s => _.name === s));
  }
  return p;
}

/**
 * Appends a new point to the lasso
 *
 * @param {*} lasso the lasso in pixel space
 * @param {*} x the x coordinate in pixel space
 * @param {*} y the y coordinate in pixel space
 * @param {*} minDist the minimum distance, in pixels, that thenew point needs to be apart from the last point
 * @returns a new array containing the lasso with the new point
 */
function extension_lassoAppend(lasso, x, y) {
  let minDist = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 5;
  lasso = extension_vega_util_module_array(lasso);
  const last = lasso[lasso.length - 1];

  // Add point to lasso if its the first point or distance to last point exceed minDist
  return last === undefined || Math.hypot(last[0] - x, last[1] - y) > minDist ? [...lasso, [x, y]] : lasso;
}

/**
 * Generates a svg path command which draws a lasso
 *
 * @param {*} lasso the lasso in pixel space in the form [[x,y], [x,y], ...]
 * @returns the svg path command that draws the lasso
 */
function extension_lassoPath(lasso) {
  return extension_vega_util_module_array(lasso).reduce((svg, _ref, i) => {
    let [x, y] = _ref;
    return svg += i == 0 ? `M ${x},${y} ` : i === lasso.length - 1 ? ' Z' : `L ${x},${y} `;
  }, '');
}

/**
 * Inverts the lasso from pixel space to an array of vega scenegraph tuples
 *
 * @param {*} data the dataset
 * @param {*} pixelLasso the lasso in pixel space, [[x,y], [x,y], ...]
 * @param {*} unit the unit where the lasso is defined
 *
 * @returns an array of vega scenegraph tuples
 */
function extension_intersectLasso(markname, pixelLasso, unit) {
  const {
    x,
    y,
    mark
  } = unit;
  const bb = new extension_Bounds().set(Number.MAX_SAFE_INTEGER, Number.MAX_SAFE_INTEGER, Number.MIN_SAFE_INTEGER, Number.MIN_SAFE_INTEGER);

  // Get bounding box around lasso
  for (const [px, py] of pixelLasso) {
    if (px < bb.x1) bb.x1 = px;
    if (px > bb.x2) bb.x2 = px;
    if (py < bb.y1) bb.y1 = py;
    if (py > bb.y2) bb.y2 = py;
  }

  // Translate bb against unit coordinates
  bb.translate(x, y);
  const intersection = extension_vega_functions_module_intersect([[bb.x1, bb.y1], [bb.x2, bb.y2]], markname, mark);

  // Check every point against the lasso
  return intersection.filter(tuple => extension_pointInPolygon(tuple.x, tuple.y, pixelLasso));
}

/**
 * Performs a test if a point is inside a polygon based on the idea from
 * https://wrf.ecse.rpi.edu/Research/Short_Notes/pnpoly.html
 *
 * This method will not need the same start/end point since it wraps around the edges of the array
 *
 * @param {*} test a point to test against
 * @param {*} polygon a polygon in the form [[x,y], [x,y], ...]
 * @returns true if the point lies inside the polygon, false otherwise
 */
function extension_pointInPolygon(testx, testy, polygon) {
  let intersections = 0;
  for (let i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
    const [prevX, prevY] = polygon[j];
    const [x, y] = polygon[i];

    // count intersections
    if (y > testy != prevY > testy && testx < (prevX - x) * (testy - y) / (prevY - y) + x) {
      intersections++;
    }
  }

  // point is in polygon if intersection count is odd
  return intersections & 1;
}

// Expression function context object
const extension_functionContext = {
  random() {
    return extension_vega_statistics_module_random();
  },
  // override default
  cumulativeNormal: extension_cumulativeNormal,
  cumulativeLogNormal: extension_cumulativeLogNormal,
  cumulativeUniform: extension_cumulativeUniform,
  densityNormal: extension_densityNormal,
  densityLogNormal: extension_densityLogNormal,
  densityUniform: extension_densityUniform,
  quantileNormal: extension_quantileNormal,
  quantileLogNormal: extension_quantileLogNormal,
  quantileUniform: extension_quantileUniform,
  sampleNormal: extension_sampleNormal,
  sampleLogNormal: extension_sampleLogNormal,
  sampleUniform: extension_sampleUniform,
  isArray: extension_vega_util_module_isArray,
  isBoolean: extension_vega_util_module_isBoolean,
  isDate: extension_isDate,
  isDefined(_) {
    return _ !== undefined;
  },
  isNumber: extension_vega_util_module_isNumber,
  isObject: extension_vega_util_module_isObject,
  isRegExp: extension_isRegExp,
  isString: extension_vega_util_module_isString,
  isTuple: extension_isTuple,
  isValid(_) {
    return _ != null && _ === _;
  },
  toBoolean: extension_toBoolean,
  toDate(_) {
    return extension_toDate(_);
  },
  // suppress extra arguments
  toNumber: extension_toNumber,
  toString: extension_vega_util_module_toString,
  indexof: extension_indexof,
  join: extension_vega_functions_module_join,
  lastindexof: extension_lastindexof,
  replace: extension_vega_functions_module_replace,
  reverse: extension_vega_functions_module_reverse,
  slice: extension_vega_functions_module_slice,
  flush: extension_vega_util_module_flush,
  lerp: extension_lerp,
  merge: extension_vega_functions_module_merge,
  pad: extension_vega_util_module_pad,
  peek: extension_peek,
  pluck: extension_pluck,
  span: extension_span,
  inrange: extension_inrange,
  truncate: extension_truncate,
  rgb: extension_color_rgb,
  lab: extension_lab,
  hcl: extension_hcl,
  hsl: extension_hsl,
  luminance: extension_luminance,
  contrast: extension_contrast,
  sequence: extension_range_range,
  format: extension_vega_functions_module_format,
  utcFormat: extension_vega_functions_module_utcFormat,
  utcParse: extension_vega_functions_module_utcParse,
  utcOffset: extension_utcOffset,
  utcSequence: extension_utcSequence,
  timeFormat: extension_vega_functions_module_timeFormat,
  timeParse: extension_vega_functions_module_timeParse,
  timeOffset: extension_timeOffset,
  timeSequence: extension_timeSequence,
  timeUnitSpecifier: extension_timeUnitSpecifier,
  monthFormat: extension_monthFormat,
  monthAbbrevFormat: extension_monthAbbrevFormat,
  dayFormat: extension_dayFormat,
  dayAbbrevFormat: extension_dayAbbrevFormat,
  quarter: extension_quarter,
  utcquarter: extension_utcquarter,
  week: extension_vega_time_module_week,
  utcweek: extension_vega_time_module_utcweek,
  dayofyear: extension_vega_time_module_dayofyear,
  utcdayofyear: extension_vega_time_module_utcdayofyear,
  warn: extension_warn,
  info: extension_info,
  debug: extension_vega_functions_module_debug,
  extent(_) {
    return extension_extent(_);
  },
  // suppress extra arguments
  inScope: extension_inScope,
  intersect: extension_vega_functions_module_intersect,
  clampRange: extension_vega_util_module_clampRange,
  pinchDistance: extension_pinchDistance,
  pinchAngle: extension_pinchAngle,
  screen: extension_screen,
  containerSize: extension_containerSize,
  windowSize: extension_windowSize,
  bandspace: extension_bandspace,
  setdata: extension_setdata,
  pathShape: extension_pathShape,
  panLinear: extension_panLinear,
  panLog: extension_panLog,
  panPow: extension_panPow,
  panSymlog: extension_panSymlog,
  zoomLinear: extension_zoomLinear,
  zoomLog: extension_zoomLog,
  zoomPow: extension_zoomPow,
  zoomSymlog: extension_zoomSymlog,
  encode: extension_vega_functions_module_encode,
  modify: extension_modify,
  lassoAppend: extension_lassoAppend,
  lassoPath: extension_lassoPath,
  intersectLasso: extension_intersectLasso
};
const extension_eventFunctions = ['view', 'item', 'group', 'xy', 'x', 'y'],
  // event functions
  extension_eventPrefix = 'event.vega.',
  // event function prefix
  extension_thisPrefix = 'this.',
  // function context prefix
  extension_astVisitors = {}; // AST visitors for dependency analysis

// export code generator parameters
const extension_codegenParams = {
  forbidden: ['_'],
  allowed: ['datum', 'event', 'item'],
  fieldvar: 'datum',
  globalvar: id => `_[${extension_$(extension_SignalPrefix + id)}]`,
  functions: extension_buildFunctions,
  constants: extension_Constants,
  visitors: extension_astVisitors
};

// export code generator
const extension_codeGenerator = extension_vega_expression_module_codegen(extension_codegenParams);

// Build expression function registry
function extension_buildFunctions(codegen) {
  const fn = extension_Functions(codegen);
  extension_eventFunctions.forEach(name => fn[name] = extension_eventPrefix + name);
  for (const name in extension_functionContext) {
    fn[name] = extension_thisPrefix + name;
  }
  extension_extend(fn, extension_internalScaleFunctions(codegen, extension_functionContext, extension_astVisitors));
  return fn;
}

// Register an expression function
function extension_expressionFunction(name, fn, visitor) {
  if (arguments.length === 1) {
    return extension_functionContext[name];
  }

  // register with the functionContext
  extension_functionContext[name] = fn;

  // if there is an astVisitor register that, too
  if (visitor) extension_astVisitors[name] = visitor;

  // if the code generator has already been initialized,
  // we need to also register the function with it
  if (extension_codeGenerator) extension_codeGenerator.functions[name] = extension_thisPrefix + name;
  return this;
}

// register expression functions with ast visitors
extension_expressionFunction('bandwidth', extension_bandwidth, extension_scaleVisitor);
extension_expressionFunction('copy', extension_vega_functions_module_copy, extension_scaleVisitor);
extension_expressionFunction('domain', extension_domain, extension_scaleVisitor);
extension_expressionFunction('range', extension_vega_functions_module_range, extension_scaleVisitor);
extension_expressionFunction('invert', extension_invert, extension_scaleVisitor);
extension_expressionFunction('scale', extension_vega_functions_module_scale, extension_scaleVisitor);
extension_expressionFunction('gradient', extension_scaleGradient, extension_scaleVisitor);
extension_expressionFunction('geoArea', extension_geoArea, extension_scaleVisitor);
extension_expressionFunction('geoBounds', extension_geoBounds, extension_scaleVisitor);
extension_expressionFunction('geoCentroid', extension_geoCentroid, extension_scaleVisitor);
extension_expressionFunction('geoShape', extension_geoShape, extension_scaleVisitor);
extension_expressionFunction('geoScale', extension_geoScale, extension_scaleVisitor);
extension_expressionFunction('indata', extension_indata, extension_indataVisitor);
extension_expressionFunction('data', extension_vega_functions_module_data, extension_dataVisitor);
extension_expressionFunction('treePath', extension_treePath, extension_dataVisitor);
extension_expressionFunction('treeAncestors', extension_treeAncestors, extension_dataVisitor);

// register Vega-Lite selection functions
extension_expressionFunction('vlSelectionTest', extension_selectionTest, extension_selectionVisitor);
extension_expressionFunction('vlSelectionIdTest', extension_selectionIdTest, extension_selectionVisitor);
extension_expressionFunction('vlSelectionResolve', extension_selectionResolve, extension_selectionVisitor);
extension_expressionFunction('vlSelectionTuples', extension_selectionTuples);

function extension_vega_functions_module_parser (expr, scope) {
  const params = {};

  // parse the expression to an abstract syntax tree (ast)
  let ast;
  try {
    expr = extension_vega_util_module_isString(expr) ? expr : extension_$(expr) + '';
    ast = extension_parser(expr);
  } catch (err) {
    extension_vega_util_module_error('Expression parse error: ' + expr);
  }

  // analyze ast function calls for dependencies
  ast.visit(node => {
    if (node.type !== extension_CallExpression) return;
    const name = node.callee.name,
      visit = extension_codegenParams.visitors[name];
    if (visit) visit(name, node.arguments, scope, params);
  });

  // perform code generation
  const gen = extension_codeGenerator(ast);

  // collect signal dependencies
  gen.globals.forEach(name => {
    const signalName = extension_SignalPrefix + name;
    if (!extension_vega_util_module_has(params, signalName) && scope.getSignal(name)) {
      params[signalName] = scope.signalRef(name);
    }
  });

  // return generated expression code and dependencies
  return {
    $expr: extension_extend({
      code: gen.code
    }, scope.options.ast ? {
      ast
    } : null),
    $fields: gen.fields,
    $params: params
  };
}



;// ../../node_modules/vega-runtime/build/vega-runtime.module.js



/**
 * Parse a serialized dataflow specification.
 */
function extension_vega_runtime_module_parse (spec) {
  const ctx = this,
    operators = spec.operators || [];

  // parse background
  if (spec.background) {
    ctx.background = spec.background;
  }

  // parse event configuration
  if (spec.eventConfig) {
    ctx.eventConfig = spec.eventConfig;
  }

  // parse locale configuration
  if (spec.locale) {
    ctx.locale = spec.locale;
  }

  // parse operators
  operators.forEach(entry => ctx.parseOperator(entry));

  // parse operator parameters
  operators.forEach(entry => ctx.parseOperatorParameters(entry));

  // parse streams
  (spec.streams || []).forEach(entry => ctx.parseStream(entry));

  // parse updates
  (spec.updates || []).forEach(entry => ctx.parseUpdate(entry));
  return ctx.resolve();
}

const extension_Skip = extension_toSet(['rule']),
  extension_Swap = extension_toSet(['group', 'image', 'rect']);
function extension_adjustSpatial(encode, marktype) {
  let code = '';
  if (extension_Skip[marktype]) return code;
  if (encode.x2) {
    if (encode.x) {
      if (extension_Swap[marktype]) {
        code += 'if(o.x>o.x2)$=o.x,o.x=o.x2,o.x2=$;';
      }
      code += 'o.width=o.x2-o.x;';
    } else {
      code += 'o.x=o.x2-(o.width||0);';
    }
  }
  if (encode.xc) {
    code += 'o.x=o.xc-(o.width||0)/2;';
  }
  if (encode.y2) {
    if (encode.y) {
      if (extension_Swap[marktype]) {
        code += 'if(o.y>o.y2)$=o.y,o.y=o.y2,o.y2=$;';
      }
      code += 'o.height=o.y2-o.y;';
    } else {
      code += 'o.y=o.y2-(o.height||0);';
    }
  }
  if (encode.yc) {
    code += 'o.y=o.yc-(o.height||0)/2;';
  }
  return code;
}
function extension_canonicalType(type) {
  return (type + '').toLowerCase();
}
function extension_isOperator(type) {
  return extension_canonicalType(type) === 'operator';
}
function extension_isCollect(type) {
  return extension_canonicalType(type) === 'collect';
}

function extension_expression(ctx, args, code) {
  // wrap code in return statement if expression does not terminate
  if (!code.endsWith(';')) {
    code = 'return(' + code + ');';
  }
  const fn = Function(...args.concat(code));
  return ctx && ctx.functions ? fn.bind(ctx.functions) : fn;
}

// generate code for comparing a single field
function extension_vega_runtime_module_compare(u, v, lt, gt) {
  return `((u = ${u}) < (v = ${v}) || u == null) && v != null ? ${lt}
  : (u > v || v == null) && u != null ? ${gt}
  : ((v = v instanceof Date ? +v : v), (u = u instanceof Date ? +u : u)) !== u && v === v ? ${lt}
  : v !== v && u === u ? ${gt} : `;
}
var extension_expressionCodegen = {
  /**
   * Parse an expression used to update an operator value.
   */
  operator: (ctx, expr) => extension_expression(ctx, ['_'], expr.code),
  /**
   * Parse an expression provided as an operator parameter value.
   */
  parameter: (ctx, expr) => extension_expression(ctx, ['datum', '_'], expr.code),
  /**
   * Parse an expression applied to an event stream.
   */
  event: (ctx, expr) => extension_expression(ctx, ['event'], expr.code),
  /**
   * Parse an expression used to handle an event-driven operator update.
   */
  handler: (ctx, expr) => {
    const code = `var datum=event.item&&event.item.datum;return ${expr.code};`;
    return extension_expression(ctx, ['_', 'event'], code);
  },
  /**
   * Parse an expression that performs visual encoding.
   */
  encode: (ctx, encode) => {
    const {
      marktype,
      channels
    } = encode;
    let code = 'var o=item,datum=o.datum,m=0,$;';
    for (const name in channels) {
      const o = 'o[' + extension_$(name) + ']';
      code += `$=${channels[name].code};if(${o}!==$)${o}=$,m=1;`;
    }
    code += extension_adjustSpatial(channels, marktype);
    code += 'return m;';
    return extension_expression(ctx, ['item', '_'], code);
  },
  /**
   * Optimized code generators for access and comparison.
   */
  codegen: {
    get(path) {
      const ref = `[${path.map(extension_$).join('][')}]`;
      const get = Function('_', `return _${ref};`);
      get.path = ref;
      return get;
    },
    comparator(fields, orders) {
      let t;
      const map = (f, i) => {
        const o = orders[i];
        let u, v;
        if (f.path) {
          u = `a${f.path}`;
          v = `b${f.path}`;
        } else {
          (t = t || {})['f' + i] = f;
          u = `this.f${i}(a)`;
          v = `this.f${i}(b)`;
        }
        return extension_vega_runtime_module_compare(u, v, -o, o);
      };
      const fn = Function('a', 'b', 'var u, v; return ' + fields.map(map).join('') + '0;');
      return t ? fn.bind(t) : fn;
    }
  }
};

/**
 * Parse a dataflow operator.
 */
function extension_vega_runtime_module_parseOperator(spec) {
  const ctx = this;
  if (extension_isOperator(spec.type) || !spec.type) {
    ctx.operator(spec, spec.update ? ctx.operatorExpression(spec.update) : null);
  } else {
    ctx.transform(spec, spec.type);
  }
}

/**
 * Parse and assign operator parameters.
 */
function extension_parseOperatorParameters(spec) {
  const ctx = this;
  if (spec.params) {
    const op = ctx.get(spec.id);
    if (!op) extension_vega_util_module_error('Invalid operator id: ' + spec.id);
    ctx.dataflow.connect(op, op.parameters(ctx.parseParameters(spec.params), spec.react, spec.initonly));
  }
}

/**
 * Parse a set of operator parameters.
 */
function extension_parseParameters(spec, params) {
  params = params || {};
  const ctx = this;
  for (const key in spec) {
    const value = spec[key];
    params[key] = extension_vega_util_module_isArray(value) ? value.map(v => extension_parseParameter(v, ctx, params)) : extension_parseParameter(value, ctx, params);
  }
  return params;
}

/**
 * Parse a single parameter.
 */
function extension_parseParameter(spec, ctx, params) {
  if (!spec || !extension_vega_util_module_isObject(spec)) return spec;
  for (let i = 0, n = extension_PARSERS.length, p; i < n; ++i) {
    p = extension_PARSERS[i];
    if (extension_vega_util_module_has(spec, p.key)) {
      return p.parse(spec, ctx, params);
    }
  }
  return spec;
}

/** Reference parsers. */
var extension_PARSERS = [{
  key: '$ref',
  parse: extension_getOperator
}, {
  key: '$key',
  parse: extension_getKey
}, {
  key: '$expr',
  parse: extension_getExpression
}, {
  key: '$field',
  parse: extension_vega_runtime_module_getField
}, {
  key: '$encode',
  parse: extension_getEncode
}, {
  key: '$compare',
  parse: extension_getCompare
}, {
  key: '$context',
  parse: extension_vega_runtime_module_getContext
}, {
  key: '$subflow',
  parse: extension_getSubflow
}, {
  key: '$tupleid',
  parse: extension_getTupleId
}];

/**
 * Resolve an operator reference.
 */
function extension_getOperator(_, ctx) {
  return ctx.get(_.$ref) || extension_vega_util_module_error('Operator not defined: ' + _.$ref);
}

/**
 * Resolve an expression reference.
 */
function extension_getExpression(_, ctx, params) {
  if (_.$params) {
    // parse expression parameters
    ctx.parseParameters(_.$params, params);
  }
  const k = 'e:' + _.$expr.code;
  return ctx.fn[k] || (ctx.fn[k] = extension_accessor(ctx.parameterExpression(_.$expr), _.$fields));
}

/**
 * Resolve a key accessor reference.
 */
function extension_getKey(_, ctx) {
  const k = 'k:' + _.$key + '_' + !!_.$flat;
  return ctx.fn[k] || (ctx.fn[k] = extension_vega_util_module_key(_.$key, _.$flat, ctx.expr.codegen));
}

/**
 * Resolve a field accessor reference.
 */
function extension_vega_runtime_module_getField(_, ctx) {
  if (!_.$field) return null;
  const k = 'f:' + _.$field + '_' + _.$name;
  return ctx.fn[k] || (ctx.fn[k] = extension_vega_util_module_field(_.$field, _.$name, ctx.expr.codegen));
}

/**
 * Resolve a comparator function reference.
 */
function extension_getCompare(_, ctx) {
  // As of Vega 5.5.3, $tupleid sort is no longer used.
  // Keep here for now for backwards compatibility.
  const k = 'c:' + _.$compare + '_' + _.$order,
    c = extension_vega_util_module_array(_.$compare).map(_ => _ && _.$tupleid ? extension_tupleid : _);
  return ctx.fn[k] || (ctx.fn[k] = extension_vega_util_module_compare(c, _.$order, ctx.expr.codegen));
}

/**
 * Resolve an encode operator reference.
 */
function extension_getEncode(_, ctx) {
  const spec = _.$encode,
    encode = {};
  for (const name in spec) {
    const enc = spec[name];
    encode[name] = extension_accessor(ctx.encodeExpression(enc.$expr), enc.$fields);
    encode[name].output = enc.$output;
  }
  return encode;
}

/**
 * Resolve a context reference.
 */
function extension_vega_runtime_module_getContext(_, ctx) {
  return ctx;
}

/**
 * Resolve a recursive subflow specification.
 */
function extension_getSubflow(_, ctx) {
  const spec = _.$subflow;
  return function (dataflow, key, parent) {
    const subctx = ctx.fork().parse(spec),
      op = subctx.get(spec.operators[0].id),
      p = subctx.signals.parent;
    if (p) p.set(parent);
    op.detachSubflow = () => ctx.detach(subctx);
    return op;
  };
}

/**
 * Resolve a tuple id reference.
 */
function extension_getTupleId() {
  return extension_tupleid;
}

/**
 * Parse an event stream specification.
 */
function extension_parseStream (spec) {
  var ctx = this,
    filter = spec.filter != null ? ctx.eventExpression(spec.filter) : undefined,
    stream = spec.stream != null ? ctx.get(spec.stream) : undefined,
    args;
  if (spec.source) {
    stream = ctx.events(spec.source, spec.type, filter);
  } else if (spec.merge) {
    args = spec.merge.map(_ => ctx.get(_));
    stream = args[0].merge.apply(args[0], args.slice(1));
  }
  if (spec.between) {
    args = spec.between.map(_ => ctx.get(_));
    stream = stream.between(args[0], args[1]);
  }
  if (spec.filter) {
    stream = stream.filter(filter);
  }
  if (spec.throttle != null) {
    stream = stream.throttle(+spec.throttle);
  }
  if (spec.debounce != null) {
    stream = stream.debounce(+spec.debounce);
  }
  if (stream == null) {
    extension_vega_util_module_error('Invalid stream definition: ' + JSON.stringify(spec));
  }
  if (spec.consume) stream.consume(true);
  ctx.stream(spec, stream);
}

/**
 * Parse an event-driven operator update.
 */
function extension_parseUpdate (spec) {
  var ctx = this,
    srcid = extension_vega_util_module_isObject(srcid = spec.source) ? srcid.$ref : srcid,
    source = ctx.get(srcid),
    target = null,
    update = spec.update,
    params = undefined;
  if (!source) extension_vega_util_module_error('Source not defined: ' + spec.source);
  target = spec.target && spec.target.$expr ? ctx.eventExpression(spec.target.$expr) : ctx.get(spec.target);
  if (update && update.$expr) {
    if (update.$params) {
      params = ctx.parseParameters(update.$params);
    }
    update = ctx.handlerExpression(update.$expr);
  }
  ctx.update(spec, source, target, update, params);
}

const extension_vega_runtime_module_SKIP = {
  skip: true
};
function extension_getState(options) {
  var ctx = this,
    state = {};
  if (options.signals) {
    var signals = state.signals = {};
    Object.keys(ctx.signals).forEach(key => {
      const op = ctx.signals[key];
      if (options.signals(key, op)) {
        signals[key] = op.value;
      }
    });
  }
  if (options.data) {
    var data = state.data = {};
    Object.keys(ctx.data).forEach(key => {
      const dataset = ctx.data[key];
      if (options.data(key, dataset)) {
        data[key] = dataset.input.value;
      }
    });
  }
  if (ctx.subcontext && options.recurse !== false) {
    state.subcontext = ctx.subcontext.map(ctx => ctx.getState(options));
  }
  return state;
}
function extension_setState(state) {
  var ctx = this,
    df = ctx.dataflow,
    data = state.data,
    signals = state.signals;
  Object.keys(signals || {}).forEach(key => {
    df.update(ctx.signals[key], signals[key], extension_vega_runtime_module_SKIP);
  });
  Object.keys(data || {}).forEach(key => {
    df.pulse(ctx.data[key].input, df.changeset().remove(extension_truthy).insert(data[key]));
  });
  (state.subcontext || []).forEach((substate, i) => {
    const subctx = ctx.subcontext[i];
    if (subctx) subctx.setState(substate);
  });
}

/**
 * Context objects store the current parse state.
 * Enables lookup of parsed operators, event streams, accessors, etc.
 * Provides a 'fork' method for creating child contexts for subflows.
 */
function extension_vega_runtime_module_context (df, transforms, functions, expr) {
  return new extension_Context(df, transforms, functions, expr);
}
function extension_Context(df, transforms, functions, expr) {
  this.dataflow = df;
  this.transforms = transforms;
  this.events = df.events.bind(df);
  this.expr = expr || extension_expressionCodegen, this.signals = {};
  this.scales = {};
  this.nodes = {};
  this.data = {};
  this.fn = {};
  if (functions) {
    this.functions = Object.create(functions);
    this.functions.context = this;
  }
}
function extension_Subcontext(ctx) {
  this.dataflow = ctx.dataflow;
  this.transforms = ctx.transforms;
  this.events = ctx.events;
  this.expr = ctx.expr;
  this.signals = Object.create(ctx.signals);
  this.scales = Object.create(ctx.scales);
  this.nodes = Object.create(ctx.nodes);
  this.data = Object.create(ctx.data);
  this.fn = Object.create(ctx.fn);
  if (ctx.functions) {
    this.functions = Object.create(ctx.functions);
    this.functions.context = this;
  }
}
extension_Context.prototype = extension_Subcontext.prototype = {
  fork() {
    const ctx = new extension_Subcontext(this);
    (this.subcontext || (this.subcontext = [])).push(ctx);
    return ctx;
  },
  detach(ctx) {
    this.subcontext = this.subcontext.filter(c => c !== ctx);

    // disconnect all nodes in the subcontext
    // wipe out targets first for better efficiency
    const keys = Object.keys(ctx.nodes);
    for (const key of keys) ctx.nodes[key]._targets = null;
    for (const key of keys) ctx.nodes[key].detach();
    ctx.nodes = null;
  },
  get(id) {
    return this.nodes[id];
  },
  set(id, node) {
    return this.nodes[id] = node;
  },
  add(spec, op) {
    const ctx = this,
      df = ctx.dataflow,
      data = spec.value;
    ctx.set(spec.id, op);
    if (extension_isCollect(spec.type) && data) {
      if (data.$ingest) {
        df.ingest(op, data.$ingest, data.$format);
      } else if (data.$request) {
        df.preload(op, data.$request, data.$format);
      } else {
        df.pulse(op, df.changeset().insert(data));
      }
    }
    if (spec.root) {
      ctx.root = op;
    }
    if (spec.parent) {
      let p = ctx.get(spec.parent.$ref);
      if (p) {
        df.connect(p, [op]);
        op.targets().add(p);
      } else {
        (ctx.unresolved = ctx.unresolved || []).push(() => {
          p = ctx.get(spec.parent.$ref);
          df.connect(p, [op]);
          op.targets().add(p);
        });
      }
    }
    if (spec.signal) {
      ctx.signals[spec.signal] = op;
    }
    if (spec.scale) {
      ctx.scales[spec.scale] = op;
    }
    if (spec.data) {
      for (const name in spec.data) {
        const data = ctx.data[name] || (ctx.data[name] = {});
        spec.data[name].forEach(role => data[role] = op);
      }
    }
  },
  resolve() {
    (this.unresolved || []).forEach(fn => fn());
    delete this.unresolved;
    return this;
  },
  operator(spec, update) {
    this.add(spec, this.dataflow.add(spec.value, update));
  },
  transform(spec, type) {
    this.add(spec, this.dataflow.add(this.transforms[extension_canonicalType(type)]));
  },
  stream(spec, stream) {
    this.set(spec.id, stream);
  },
  update(spec, stream, target, update, params) {
    this.dataflow.on(stream, target, update, params, spec.options);
  },
  // expression parsing
  operatorExpression(expr) {
    return this.expr.operator(this, expr);
  },
  parameterExpression(expr) {
    return this.expr.parameter(this, expr);
  },
  eventExpression(expr) {
    return this.expr.event(this, expr);
  },
  handlerExpression(expr) {
    return this.expr.handler(this, expr);
  },
  encodeExpression(encode) {
    return this.expr.encode(this, encode);
  },
  // parse methods
  parse: extension_vega_runtime_module_parse,
  parseOperator: extension_vega_runtime_module_parseOperator,
  parseOperatorParameters: extension_parseOperatorParameters,
  parseParameters: extension_parseParameters,
  parseStream: extension_parseStream,
  parseUpdate: extension_parseUpdate,
  // state methods
  getState: extension_getState,
  setState: extension_setState
};



;// ../../node_modules/d3-timer/src/interval.js


/* harmony default export */ function extension_src_interval(callback, delay, time) {
  var t = new extension_Timer, total = delay;
  if (delay == null) return t.restart(callback, delay, time), t;
  t._restart = t.restart;
  t.restart = function(callback, delay, time) {
    delay = +delay, time = time == null ? extension_timer_now() : +time;
    t._restart(function tick(elapsed) {
      elapsed += total;
      t._restart(tick, total += delay, time);
      callback(elapsed);
    }, delay, time);
  }
  t.restart(callback, delay, time);
  return t;
}

;// ../../node_modules/vega-view/build/vega-view.module.js









// initialize aria role and label attributes
function extension_initializeAria(view) {
  const el = view.container();
  if (el) {
    el.setAttribute('role', 'graphics-document');
    el.setAttribute('aria-roleDescription', 'visualization');
    extension_ariaLabel(el, view.description());
  }
}

// update aria-label if we have a DOM container element
function extension_ariaLabel(el, desc) {
  if (el) desc == null ? el.removeAttribute('aria-label') : el.setAttribute('aria-label', desc);
}

function extension_vega_view_module_background (view) {
  // respond to background signal
  view.add(null, _ => {
    view._background = _.bg;
    view._resize = 1;
    return _.bg;
  }, {
    bg: view._signals.background
  });
}

const extension_Default = 'default';
function extension_cursor (view) {
  // get cursor signal, add to dataflow if needed
  const cursor = view._signals.cursor || (view._signals.cursor = view.add({
    user: extension_Default,
    item: null
  }));

  // evaluate cursor on each pointermove event
  view.on(view.events('view', 'pointermove'), cursor, (_, event) => {
    const value = cursor.value,
      user = value ? extension_vega_util_module_isString(value) ? value : value.user : extension_Default,
      item = event.item && event.item.cursor || null;
    return value && user === value.user && item == value.item ? value : {
      user: user,
      item: item
    };
  });

  // when cursor signal updates, set visible cursor
  view.add(null, function (_) {
    let user = _.cursor,
      item = this.value;
    if (!extension_vega_util_module_isString(user)) {
      item = user.item;
      user = user.user;
    }
    extension_setCursor(view, user && user !== extension_Default ? user : item || user);
    return item;
  }, {
    cursor: cursor
  });
}
function extension_setCursor(view, cursor) {
  const el = view.globalCursor() ? typeof document !== 'undefined' && document.body : view.container();
  if (el) {
    return cursor == null ? el.style.removeProperty('cursor') : el.style.cursor = cursor;
  }
}

function extension_dataref(view, name) {
  var data = view._runtime.data;
  if (!extension_vega_util_module_has(data, name)) {
    extension_vega_util_module_error('Unrecognized data set: ' + name);
  }
  return data[name];
}
function extension_vega_view_module_data(name, values) {
  return arguments.length < 2 ? extension_dataref(this, name).values.value : extension_change.call(this, name, extension_changeset().remove(extension_truthy).insert(values));
}
function extension_change(name, changes) {
  if (!extension_isChangeSet(changes)) {
    extension_vega_util_module_error('Second argument to changes must be a changeset.');
  }
  const dataset = extension_dataref(this, name);
  dataset.modified = true;
  return this.pulse(dataset.input, changes);
}
function extension_vega_view_module_insert(name, _) {
  return extension_change.call(this, name, extension_changeset().insert(_));
}
function extension_vega_view_module_remove(name, _) {
  return extension_change.call(this, name, extension_changeset().remove(_));
}

function extension_width(view) {
  var padding = view.padding();
  return Math.max(0, view._viewWidth + padding.left + padding.right);
}
function extension_height(view) {
  var padding = view.padding();
  return Math.max(0, view._viewHeight + padding.top + padding.bottom);
}
function extension_vega_view_module_offset(view) {
  var padding = view.padding(),
    origin = view._origin;
  return [padding.left + origin[0], padding.top + origin[1]];
}
function extension_resizeRenderer(view) {
  var origin = extension_vega_view_module_offset(view),
    w = extension_width(view),
    h = extension_height(view);
  view._renderer.background(view.background());
  view._renderer.resize(w, h, origin);
  view._handler.origin(origin);
  view._resizeListeners.forEach(handler => {
    try {
      handler(w, h);
    } catch (error) {
      view.error(error);
    }
  });
}

/**
 * Extend an event with additional view-specific methods.
 * Adds a new property ('vega') to an event that provides a number
 * of methods for querying information about the current interaction.
 * The vega object provides the following methods:
 *   view - Returns the backing View instance.
 *   item - Returns the currently active scenegraph item (if any).
 *   group - Returns the currently active scenegraph group (if any).
 *     This method accepts a single string-typed argument indicating the name
 *     of the desired parent group. The scenegraph will be traversed from
 *     the item up towards the root to search for a matching group. If no
 *     argument is provided the enclosing group for the active item is
 *     returned, unless the item it itself a group, in which case it is
 *     returned directly.
 *   xy - Returns a two-element array containing the x and y coordinates for
 *     mouse or touch events. For touch events, this is based on the first
 *     elements in the changedTouches array. This method accepts a single
 *     argument: either an item instance or mark name that should serve as
 *     the reference coordinate system. If no argument is provided the
 *     top-level view coordinate system is assumed.
 *   x - Returns the current x-coordinate, accepts the same arguments as xy.
 *   y - Returns the current y-coordinate, accepts the same arguments as xy.
 * @param {Event} event - The input event to extend.
 * @param {Item} item - The currently active scenegraph item (if any).
 * @return {Event} - The extended input event.
 */
function extension_eventExtend (view, event, item) {
  var r = view._renderer,
    el = r && r.canvas(),
    p,
    e,
    translate;
  if (el) {
    translate = extension_vega_view_module_offset(view);
    e = event.changedTouches ? event.changedTouches[0] : event;
    p = extension_vega_scenegraph_module_point(e, el);
    p[0] -= translate[0];
    p[1] -= translate[1];
  }
  event.dataflow = view;
  event.item = item;
  event.vega = extension_extension(view, item, p);
  return event;
}
function extension_extension(view, item, point) {
  const itemGroup = item ? item.mark.marktype === 'group' ? item : item.mark.group : null;
  function group(name) {
    var g = itemGroup,
      i;
    if (name) for (i = item; i; i = i.mark.group) {
      if (i.mark.name === name) {
        g = i;
        break;
      }
    }
    return g && g.mark && g.mark.interactive ? g : {};
  }
  function xy(item) {
    if (!item) return point;
    if (extension_vega_util_module_isString(item)) item = group(item);
    const p = point.slice();
    while (item) {
      p[0] -= item.x || 0;
      p[1] -= item.y || 0;
      item = item.mark && item.mark.group;
    }
    return p;
  }
  return {
    view: extension_vega_util_module_constant(view),
    item: extension_vega_util_module_constant(item || {}),
    group: group,
    xy: xy,
    x: item => xy(item)[0],
    y: item => xy(item)[1]
  };
}

const extension_VIEW = 'view',
  extension_TIMER = 'timer',
  extension_WINDOW = 'window',
  extension_NO_TRAP = {
    trap: false
  };

/**
 * Initialize event handling configuration.
 * @param {object} config - The configuration settings.
 * @return {object}
 */
function extension_initializeEventConfig(config) {
  const events = extension_extend({
    defaults: {}
  }, config);
  const unpack = (obj, keys) => {
    keys.forEach(k => {
      if (extension_vega_util_module_isArray(obj[k])) obj[k] = extension_toSet(obj[k]);
    });
  };
  unpack(events.defaults, ['prevent', 'allow']);
  unpack(events, ['view', 'window', 'selector']);
  return events;
}
function extension_trackEventListener(view, sources, type, handler) {
  view._eventListeners.push({
    type: type,
    sources: extension_vega_util_module_array(sources),
    handler: handler
  });
}
function extension_prevent(view, type) {
  var def = view._eventConfig.defaults,
    prevent = def.prevent,
    allow = def.allow;
  return prevent === false || allow === true ? false : prevent === true || allow === false ? true : prevent ? prevent[type] : allow ? !allow[type] : view.preventDefault();
}
function extension_permit(view, key, type) {
  const rule = view._eventConfig && view._eventConfig[key];
  if (rule === false || extension_vega_util_module_isObject(rule) && !rule[type]) {
    view.warn(`Blocked ${key} ${type} event listener.`);
    return false;
  }
  return true;
}

/**
 * Create a new event stream from an event source.
 * @param {object} source - The event source to monitor.
 * @param {string} type - The event type.
 * @param {function(object): boolean} [filter] - Event filter function.
 * @return {EventStream}
 */
function extension_vega_view_module_events(source, type, filter) {
  var view = this,
    s = new extension_EventStream(filter),
    send = function (e, item) {
      view.runAsync(null, () => {
        if (source === extension_VIEW && extension_prevent(view, type)) {
          e.preventDefault();
        }
        s.receive(extension_eventExtend(view, e, item));
      });
    },
    sources;
  if (source === extension_TIMER) {
    if (extension_permit(view, 'timer', type)) {
      view.timer(send, type);
    }
  } else if (source === extension_VIEW) {
    if (extension_permit(view, 'view', type)) {
      // send traps errors, so use {trap: false} option
      view.addEventListener(type, send, extension_NO_TRAP);
    }
  } else {
    if (source === extension_WINDOW) {
      if (extension_permit(view, 'window', type) && typeof window !== 'undefined') {
        sources = [window];
      }
    } else if (typeof document !== 'undefined') {
      if (extension_permit(view, 'selector', type)) {
        sources = Array.from(document.querySelectorAll(source));
      }
    }
    if (!sources) {
      view.warn('Can not resolve event source: ' + source);
    } else {
      for (var i = 0, n = sources.length; i < n; ++i) {
        sources[i].addEventListener(type, send);
      }
      extension_trackEventListener(view, sources, type, send);
    }
  }
  return s;
}

function extension_itemFilter(event) {
  return event.item;
}
function extension_markTarget(event) {
  // grab upstream collector feeding the mark operator
  return event.item.mark.source;
}
function extension_invoke(name) {
  return function (_, event) {
    return event.vega.view().changeset().encode(event.item, name);
  };
}
function extension_vega_view_module_hover (hoverSet, leaveSet) {
  hoverSet = [hoverSet || 'hover'];
  leaveSet = [leaveSet || 'update', hoverSet[0]];

  // invoke hover set upon pointerover
  this.on(this.events('view', 'pointerover', extension_itemFilter), extension_markTarget, extension_invoke(hoverSet));

  // invoke leave set upon pointerout
  this.on(this.events('view', 'pointerout', extension_itemFilter), extension_markTarget, extension_invoke(leaveSet));
  return this;
}

/**
 * Finalize a View instance that is being removed.
 * Cancel any running timers.
 * Remove all external event listeners.
 * Remove any currently displayed tooltip.
 */
function extension_finalize () {
  var tooltip = this._tooltip,
    timers = this._timers,
    handlers = this._handler.handlers(),
    listeners = this._eventListeners,
    n,
    m,
    e,
    h,
    t;
  n = timers.length;
  while (--n >= 0) {
    timers[n].stop();
  }
  n = listeners.length;
  while (--n >= 0) {
    e = listeners[n];
    m = e.sources.length;
    while (--m >= 0) {
      e.sources[m].removeEventListener(e.type, e.handler);
    }
  }
  if (tooltip) {
    tooltip.call(this, this._handler, null, null, null);
  }

  // turn off all registered handlers
  n = handlers.length;
  while (--n >= 0) {
    t = handlers[n].type;
    h = handlers[n].handler;
    this._handler.off(t, h);
  }
  return this;
}

function extension_vega_view_module_element (tag, attr, text) {
  const el = document.createElement(tag);
  for (const key in attr) el.setAttribute(key, attr[key]);
  if (text != null) el.textContent = text;
  return el;
}

const extension_BindClass = 'vega-bind',
  extension_NameClass = 'vega-bind-name',
  extension_RadioClass = 'vega-bind-radio';

/**
 * Bind a signal to an external HTML input element. The resulting two-way
 * binding will propagate input changes to signals, and propagate signal
 * changes to the input element state. If this view instance has no parent
 * element, we assume the view is headless and no bindings are created.
 * @param {Element|string} el - The parent DOM element to which the input
 *   element should be appended as a child. If string-valued, this argument
 *   will be treated as a CSS selector. If null or undefined, the parent
 *   element of this view will be used as the element.
 * @param {object} param - The binding parameters which specify the signal
 *   to bind to, the input element type, and type-specific configuration.
 * @return {View} - This view instance.
 */
function extension_vega_view_module_bind (view, el, binding) {
  if (!el) return;
  const param = binding.param;
  let bind = binding.state;
  if (!bind) {
    bind = binding.state = {
      elements: null,
      active: false,
      set: null,
      update: value => {
        if (value != view.signal(param.signal)) {
          view.runAsync(null, () => {
            bind.source = true;
            view.signal(param.signal, value);
          });
        }
      }
    };
    if (param.debounce) {
      bind.update = extension_debounce(param.debounce, bind.update);
    }
  }
  const create = param.input == null && param.element ? extension_target : extension_generate;
  create(bind, el, param, view);
  if (!bind.active) {
    view.on(view._signals[param.signal], null, () => {
      bind.source ? bind.source = false : bind.set(view.signal(param.signal));
    });
    bind.active = true;
  }
  return bind;
}

/**
 * Bind the signal to an external EventTarget.
 */
function extension_target(bind, node, param, view) {
  const type = param.event || 'input';
  const handler = () => bind.update(node.value);

  // initialize signal value to external input value
  view.signal(param.signal, node.value);

  // listen for changes on the element
  node.addEventListener(type, handler);

  // register with view, so we can remove it upon finalization
  extension_trackEventListener(view, node, type, handler);

  // propagate change to element
  bind.set = value => {
    node.value = value;
    node.dispatchEvent(extension_vega_view_module_event(type));
  };
}
function extension_vega_view_module_event(type) {
  return typeof Event !== 'undefined' ? new Event(type) : {
    type
  };
}

/**
 * Generate an HTML input form element and bind it to a signal.
 */
function extension_generate(bind, el, param, view) {
  const value = view.signal(param.signal);
  const div = extension_vega_view_module_element('div', {
    'class': extension_BindClass
  });
  const wrapper = param.input === 'radio' ? div : div.appendChild(extension_vega_view_module_element('label'));
  wrapper.appendChild(extension_vega_view_module_element('span', {
    'class': extension_NameClass
  }, param.name || param.signal));
  el.appendChild(div);
  let input = extension_vega_view_module_form;
  switch (param.input) {
    case 'checkbox':
      input = extension_vega_view_module_checkbox;
      break;
    case 'select':
      input = extension_vega_view_module_select;
      break;
    case 'radio':
      input = extension_vega_view_module_radio;
      break;
    case 'range':
      input = extension_vega_view_module_range;
      break;
  }
  input(bind, wrapper, param, value);
}

/**
 * Generates an arbitrary input form element.
 * The input type is controlled via user-provided parameters.
 */
function extension_vega_view_module_form(bind, el, param, value) {
  const node = extension_vega_view_module_element('input');
  for (const key in param) {
    if (key !== 'signal' && key !== 'element') {
      node.setAttribute(key === 'input' ? 'type' : key, param[key]);
    }
  }
  node.setAttribute('name', param.signal);
  node.value = value;
  el.appendChild(node);
  node.addEventListener('input', () => bind.update(node.value));
  bind.elements = [node];
  bind.set = value => node.value = value;
}

/**
 * Generates a checkbox input element.
 */
function extension_vega_view_module_checkbox(bind, el, param, value) {
  const attr = {
    type: 'checkbox',
    name: param.signal
  };
  if (value) attr.checked = true;
  const node = extension_vega_view_module_element('input', attr);
  el.appendChild(node);
  node.addEventListener('change', () => bind.update(node.checked));
  bind.elements = [node];
  bind.set = value => node.checked = !!value || null;
}

/**
 * Generates a selection list input element.
 */
function extension_vega_view_module_select(bind, el, param, value) {
  const node = extension_vega_view_module_element('select', {
      name: param.signal
    }),
    labels = param.labels || [];
  param.options.forEach((option, i) => {
    const attr = {
      value: option
    };
    if (extension_valuesEqual(option, value)) attr.selected = true;
    node.appendChild(extension_vega_view_module_element('option', attr, (labels[i] || option) + ''));
  });
  el.appendChild(node);
  node.addEventListener('change', () => {
    bind.update(param.options[node.selectedIndex]);
  });
  bind.elements = [node];
  bind.set = value => {
    for (let i = 0, n = param.options.length; i < n; ++i) {
      if (extension_valuesEqual(param.options[i], value)) {
        node.selectedIndex = i;
        return;
      }
    }
  };
}

/**
 * Generates a radio button group.
 */
function extension_vega_view_module_radio(bind, el, param, value) {
  const group = extension_vega_view_module_element('span', {
      'class': extension_RadioClass
    }),
    labels = param.labels || [];
  el.appendChild(group);
  bind.elements = param.options.map((option, i) => {
    const attr = {
      type: 'radio',
      name: param.signal,
      value: option
    };
    if (extension_valuesEqual(option, value)) attr.checked = true;
    const input = extension_vega_view_module_element('input', attr);
    input.addEventListener('change', () => bind.update(option));
    const label = extension_vega_view_module_element('label', {}, (labels[i] || option) + '');
    label.prepend(input);
    group.appendChild(label);
    return input;
  });
  bind.set = value => {
    const nodes = bind.elements,
      n = nodes.length;
    for (let i = 0; i < n; ++i) {
      if (extension_valuesEqual(nodes[i].value, value)) nodes[i].checked = true;
    }
  };
}

/**
 * Generates a slider input element.
 */
function extension_vega_view_module_range(bind, el, param, value) {
  value = value !== undefined ? value : (+param.max + +param.min) / 2;
  const max = param.max != null ? param.max : Math.max(100, +value) || 100,
    min = param.min || Math.min(0, max, +value) || 0,
    step = param.step || extension_tickStep(min, max, 100);
  const node = extension_vega_view_module_element('input', {
    type: 'range',
    name: param.signal,
    min: min,
    max: max,
    step: step
  });
  node.value = value;
  const span = extension_vega_view_module_element('span', {}, +value);
  el.appendChild(node);
  el.appendChild(span);
  const update = () => {
    span.textContent = node.value;
    bind.update(+node.value);
  };

  // subscribe to both input and change
  node.addEventListener('input', update);
  node.addEventListener('change', update);
  bind.elements = [node];
  bind.set = value => {
    node.value = value;
    span.textContent = value;
  };
}
function extension_valuesEqual(a, b) {
  return a === b || a + '' === b + '';
}

function extension_initializeRenderer (view, r, el, constructor, scaleFactor, opt) {
  r = r || new constructor(view.loader());
  return r.initialize(el, extension_width(view), extension_height(view), extension_vega_view_module_offset(view), scaleFactor, opt).background(view.background());
}

function extension_trap (view, fn) {
  return !fn ? null : function () {
    try {
      fn.apply(this, arguments);
    } catch (error) {
      view.error(error);
    }
  };
}

function extension_initializeHandler (view, prevHandler, el, constructor) {
  // instantiate scenegraph handler
  const handler = new constructor(view.loader(), extension_trap(view, view.tooltip())).scene(view.scenegraph().root).initialize(el, extension_vega_view_module_offset(view), view);

  // transfer event handlers
  if (prevHandler) {
    prevHandler.handlers().forEach(h => {
      handler.on(h.type, h.handler);
    });
  }
  return handler;
}

function extension_vega_view_module_initialize (el, elBind) {
  const view = this,
    type = view._renderType,
    config = view._eventConfig.bind,
    module = extension_renderModule(type);

  // containing dom element
  el = view._el = el ? extension_vega_view_module_lookup(view, el, true) : null;

  // initialize aria attributes
  extension_initializeAria(view);

  // select appropriate renderer & handler
  if (!module) view.error('Unrecognized renderer type: ' + type);
  const Handler = module.handler || extension_CanvasHandler,
    Renderer = el ? module.renderer : module.headless;

  // initialize renderer and input handler
  view._renderer = !Renderer ? null : extension_initializeRenderer(view, view._renderer, el, Renderer);
  view._handler = extension_initializeHandler(view, view._handler, el, Handler);
  view._redraw = true;

  // initialize signal bindings
  if (el && config !== 'none') {
    elBind = elBind ? view._elBind = extension_vega_view_module_lookup(view, elBind, true) : el.appendChild(extension_vega_view_module_element('form', {
      'class': 'vega-bindings'
    }));
    view._bind.forEach(_ => {
      if (_.param.element && config !== 'container') {
        _.element = extension_vega_view_module_lookup(view, _.param.element, !!_.param.input);
      }
    });
    view._bind.forEach(_ => {
      extension_vega_view_module_bind(view, _.element || elBind, _);
    });
  }
  return view;
}
function extension_vega_view_module_lookup(view, el, clear) {
  if (typeof el === 'string') {
    if (typeof document !== 'undefined') {
      el = document.querySelector(el);
      if (!el) {
        view.error('Signal bind element not found: ' + el);
        return null;
      }
    } else {
      view.error('DOM document instance not found.');
      return null;
    }
  }
  if (el && clear) {
    try {
      el.textContent = '';
    } catch (e) {
      el = null;
      view.error(e);
    }
  }
  return el;
}

const extension_vega_view_module_number = _ => +_ || 0;
const extension_paddingObject = _ => ({
  top: _,
  bottom: _,
  left: _,
  right: _
});
function extension_padding (_) {
  return extension_vega_util_module_isObject(_) ? {
    top: extension_vega_view_module_number(_.top),
    bottom: extension_vega_view_module_number(_.bottom),
    left: extension_vega_view_module_number(_.left),
    right: extension_vega_view_module_number(_.right)
  } : extension_paddingObject(extension_vega_view_module_number(_));
}

/**
 * Render the current scene in a headless fashion.
 * This method is asynchronous, returning a Promise instance.
 * @return {Promise} - A Promise that resolves to a renderer.
 */
async function extension_renderHeadless (view, type, scaleFactor, opt) {
  const module = extension_renderModule(type),
    ctr = module && module.headless;
  if (!ctr) extension_vega_util_module_error('Unrecognized renderer type: ' + type);
  await view.runAsync();
  return extension_initializeRenderer(view, null, null, ctr, scaleFactor, opt).renderAsync(view._scenegraph.root);
}

/**
 * Produce an image URL for the visualization. Depending on the type
 * parameter, the generated URL contains data for either a PNG or SVG image.
 * The URL can be used (for example) to download images of the visualization.
 * This method is asynchronous, returning a Promise instance.
 * @param {string} type - The image type. One of 'svg', 'png' or 'canvas'.
 *   The 'canvas' and 'png' types are synonyms for a PNG image.
 * @return {Promise} - A promise that resolves to an image URL.
 */
async function extension_renderToImageURL (type, scaleFactor) {
  if (type !== extension_RenderType.Canvas && type !== extension_RenderType.SVG && type !== extension_RenderType.PNG) {
    extension_vega_util_module_error('Unrecognized image type: ' + type);
  }
  const r = await extension_renderHeadless(this, type, scaleFactor);
  return type === extension_RenderType.SVG ? extension_toBlobURL(r.svg(), 'image/svg+xml') : r.canvas().toDataURL('image/png');
}
function extension_toBlobURL(data, mime) {
  const blob = new Blob([data], {
    type: mime
  });
  return window.URL.createObjectURL(blob);
}

/**
 * Produce a Canvas instance containing a rendered visualization.
 * This method is asynchronous, returning a Promise instance.
 * @return {Promise} - A promise that resolves to a Canvas instance.
 */
async function extension_renderToCanvas (scaleFactor, opt) {
  const r = await extension_renderHeadless(this, extension_RenderType.Canvas, scaleFactor, opt);
  return r.canvas();
}

/**
 * Produce a rendered SVG string of the visualization.
 * This method is asynchronous, returning a Promise instance.
 * @return {Promise} - A promise that resolves to an SVG string.
 */
async function extension_renderToSVG (scaleFactor) {
  const r = await extension_renderHeadless(this, extension_RenderType.SVG, scaleFactor);
  return r.svg();
}

function extension_runtime (view, spec, expr) {
  return extension_vega_runtime_module_context(view, extension_transforms, extension_functionContext, expr).parse(spec);
}

function extension_vega_view_module_scale(name) {
  var scales = this._runtime.scales;
  if (!extension_vega_util_module_has(scales, name)) {
    extension_vega_util_module_error('Unrecognized scale or projection: ' + name);
  }
  return scales[name].value;
}

var extension_Width = 'width',
  extension_Height = 'height',
  extension_vega_view_module_Padding = 'padding',
  extension_vega_view_module_Skip = {
    skip: true
  };
function extension_viewWidth(view, width) {
  var a = view.autosize(),
    p = view.padding();
  return width - (a && a.contains === extension_vega_view_module_Padding ? p.left + p.right : 0);
}
function extension_viewHeight(view, height) {
  var a = view.autosize(),
    p = view.padding();
  return height - (a && a.contains === extension_vega_view_module_Padding ? p.top + p.bottom : 0);
}
function extension_initializeResize(view) {
  var s = view._signals,
    w = s[extension_Width],
    h = s[extension_Height],
    p = s[extension_vega_view_module_Padding];
  function resetSize() {
    view._autosize = view._resize = 1;
  }

  // respond to width signal
  view._resizeWidth = view.add(null, _ => {
    view._width = _.size;
    view._viewWidth = extension_viewWidth(view, _.size);
    resetSize();
  }, {
    size: w
  });

  // respond to height signal
  view._resizeHeight = view.add(null, _ => {
    view._height = _.size;
    view._viewHeight = extension_viewHeight(view, _.size);
    resetSize();
  }, {
    size: h
  });

  // respond to padding signal
  const resizePadding = view.add(null, resetSize, {
    pad: p
  });

  // set rank to run immediately after source signal
  view._resizeWidth.rank = w.rank + 1;
  view._resizeHeight.rank = h.rank + 1;
  resizePadding.rank = p.rank + 1;
}
function extension_resizeView(viewWidth, viewHeight, width, height, origin, auto) {
  this.runAfter(view => {
    let rerun = 0;

    // reset autosize flag
    view._autosize = 0;

    // width value changed: update signal, skip resize op
    if (view.width() !== width) {
      rerun = 1;
      view.signal(extension_Width, width, extension_vega_view_module_Skip); // set width, skip update calc
      view._resizeWidth.skip(true); // skip width resize handler
    }

    // height value changed: update signal, skip resize op
    if (view.height() !== height) {
      rerun = 1;
      view.signal(extension_Height, height, extension_vega_view_module_Skip); // set height, skip update calc
      view._resizeHeight.skip(true); // skip height resize handler
    }

    // view width changed: update view property, set resize flag
    if (view._viewWidth !== viewWidth) {
      view._resize = 1;
      view._viewWidth = viewWidth;
    }

    // view height changed: update view property, set resize flag
    if (view._viewHeight !== viewHeight) {
      view._resize = 1;
      view._viewHeight = viewHeight;
    }

    // origin changed: update view property, set resize flag
    if (view._origin[0] !== origin[0] || view._origin[1] !== origin[1]) {
      view._resize = 1;
      view._origin = origin;
    }

    // run dataflow on width/height signal change
    if (rerun) view.run('enter');
    if (auto) view.runAfter(v => v.resize());
  }, false, 1);
}

/**
 * Get the current view state, consisting of signal values and/or data sets.
 * @param {object} [options] - Options flags indicating which state to export.
 *   If unspecified, all signals and data sets will be exported.
 * @param {function(string, Operator):boolean} [options.signals] - Optional
 *   predicate function for testing if a signal should be included in the
 *   exported state. If unspecified, all signals will be included, except for
 *   those named 'parent' or those which refer to a Transform value.
 * @param {function(string, object):boolean} [options.data] - Optional
 *   predicate function for testing if a data set's input should be included
 *   in the exported state. If unspecified, all data sets that have been
 *   explicitly modified will be included.
 * @param {boolean} [options.recurse=true] - Flag indicating if the exported
 *   state should recursively include state from group mark sub-contexts.
 * @return {object} - An object containing the exported state values.
 */
function extension_vega_view_module_getState(options) {
  return this._runtime.getState(options || {
    data: extension_dataTest,
    signals: extension_signalTest,
    recurse: true
  });
}
function extension_dataTest(name, data) {
  return data.modified && extension_vega_util_module_isArray(data.input.value) && !name.startsWith('_:vega:_');
}
function extension_signalTest(name, op) {
  return !(name === 'parent' || op instanceof extension_transforms.proxy);
}

/**
 * Sets the current view state and updates the view by invoking run.
 * @param {object} state - A state object containing signal and/or
 *   data set values, following the format used by the getState method.
 * @return {View} - This view instance.
 */
function extension_vega_view_module_setState(state) {
  this.runAsync(null, v => {
    v._trigger = false;
    v._runtime.setState(state);
  }, v => {
    v._trigger = true;
  });
  return this;
}

function extension_vega_view_module_timer (callback, delay) {
  function tick(elapsed) {
    callback({
      timestamp: Date.now(),
      elapsed: elapsed
    });
  }
  this._timers.push(extension_src_interval(tick, delay));
}

function extension_vega_view_module_defaultTooltip (handler, event, item, value) {
  const el = handler.element();
  if (el) el.setAttribute('title', extension_formatTooltip(value));
}
function extension_formatTooltip(value) {
  return value == null ? '' : extension_vega_util_module_isArray(value) ? extension_formatArray(value) : extension_vega_util_module_isObject(value) && !extension_isDate(value) ? extension_formatObject(value) : value + '';
}
function extension_formatObject(obj) {
  return Object.keys(obj).map(key => {
    const v = obj[key];
    return key + ': ' + (extension_vega_util_module_isArray(v) ? extension_formatArray(v) : extension_vega_view_module_formatValue(v));
  }).join('\n');
}
function extension_formatArray(value) {
  return '[' + value.map(extension_vega_view_module_formatValue).join(', ') + ']';
}
function extension_vega_view_module_formatValue(value) {
  return extension_vega_util_module_isArray(value) ? '[\u2026]' : extension_vega_util_module_isObject(value) && !extension_isDate(value) ? '{\u2026}' : value;
}

function extension_watchPixelRatio () {
  // based on https://developer.mozilla.org/en-US/docs/Web/API/Window/devicePixelRatio#monitoring_screen_resolution_or_zoom_level_changes
  if (this.renderer() === 'canvas' && this._renderer._canvas) {
    let remove = null;
    const updatePixelRatio = () => {
      if (remove != null) {
        remove();
      }
      const media = matchMedia(`(resolution: ${window.devicePixelRatio}dppx)`);
      media.addEventListener('change', updatePixelRatio);
      remove = () => {
        media.removeEventListener('change', updatePixelRatio);
      };
      this._renderer._canvas.getContext('2d').pixelRatio = window.devicePixelRatio || 1;
      this._redraw = true;
      this._resize = 1;
      this.resize().runAsync();
    };
    updatePixelRatio();
  }
}

/**
 * Create a new View instance from a Vega dataflow runtime specification.
 * The generated View will not immediately be ready for display. Callers
 * should also invoke the initialize method (e.g., to set the parent
 * DOM element in browser-based deployment) and then invoke the run
 * method to evaluate the dataflow graph. Rendering will automatically
 * be performed upon dataflow runs.
 * @constructor
 * @param {object} spec - The Vega dataflow runtime specification.
 */
function extension_View(spec, options) {
  const view = this;
  options = options || {};
  extension_Dataflow.call(view);
  if (options.loader) view.loader(options.loader);
  if (options.logger) view.logger(options.logger);
  if (options.logLevel != null) view.logLevel(options.logLevel);
  if (options.locale || spec.locale) {
    const loc = extension_extend({}, spec.locale, options.locale);
    view.locale(extension_vega_format_module_locale(loc.number, loc.time));
  }
  view._el = null;
  view._elBind = null;
  view._renderType = options.renderer || extension_RenderType.Canvas;
  view._scenegraph = new extension_Scenegraph();
  const root = view._scenegraph.root;

  // initialize renderer, handler and event management
  view._renderer = null;
  view._tooltip = options.tooltip || extension_vega_view_module_defaultTooltip, view._redraw = true;
  view._handler = new extension_CanvasHandler().scene(root);
  view._globalCursor = false;
  view._preventDefault = false;
  view._timers = [];
  view._eventListeners = [];
  view._resizeListeners = [];

  // initialize event configuration
  view._eventConfig = extension_initializeEventConfig(spec.eventConfig);
  view.globalCursor(view._eventConfig.globalCursor);

  // initialize dataflow graph
  const ctx = extension_runtime(view, spec, options.expr);
  view._runtime = ctx;
  view._signals = ctx.signals;
  view._bind = (spec.bindings || []).map(_ => ({
    state: null,
    param: extension_extend({}, _)
  }));

  // initialize scenegraph
  if (ctx.root) ctx.root.set(root);
  root.source = ctx.data.root.input;
  view.pulse(ctx.data.root.input, view.changeset().insert(root.items));

  // initialize view size
  view._width = view.width();
  view._height = view.height();
  view._viewWidth = extension_viewWidth(view, view._width);
  view._viewHeight = extension_viewHeight(view, view._height);
  view._origin = [0, 0];
  view._resize = 0;
  view._autosize = 1;
  extension_initializeResize(view);

  // initialize background color
  extension_vega_view_module_background(view);

  // initialize cursor
  extension_cursor(view);

  // initialize view description
  view.description(spec.description);

  // initialize hover proessing, if requested
  if (options.hover) view.hover();

  // initialize DOM container(s) and renderer
  if (options.container) view.initialize(options.container, options.bind);
  if (options.watchPixelRatio) view._watchPixelRatio();
}
function extension_lookupSignal(view, name) {
  return extension_vega_util_module_has(view._signals, name) ? view._signals[name] : extension_vega_util_module_error('Unrecognized signal name: ' + extension_$(name));
}
function extension_findOperatorHandler(op, handler) {
  const h = (op._targets || []).filter(op => op._update && op._update.handler === handler);
  return h.length ? h[0] : null;
}
function extension_addOperatorListener(view, name, op, handler) {
  let h = extension_findOperatorHandler(op, handler);
  if (!h) {
    h = extension_trap(view, () => handler(name, op.value));
    h.handler = handler;
    view.on(op, null, h);
  }
  return view;
}
function extension_removeOperatorListener(view, op, handler) {
  const h = extension_findOperatorHandler(op, handler);
  if (h) op._targets.remove(h);
  return view;
}
extension_inherits(extension_View, extension_Dataflow, {
  // -- DATAFLOW / RENDERING ----

  async evaluate(encode, prerun, postrun) {
    // evaluate dataflow and prerun
    await extension_Dataflow.prototype.evaluate.call(this, encode, prerun);

    // render as needed
    if (this._redraw || this._resize) {
      try {
        if (this._renderer) {
          if (this._resize) {
            this._resize = 0;
            extension_resizeRenderer(this);
          }
          await this._renderer.renderAsync(this._scenegraph.root);
        }
        this._redraw = false;
      } catch (e) {
        this.error(e);
      }
    }

    // evaluate postrun
    if (postrun) extension_asyncCallback(this, postrun);
    return this;
  },
  dirty(item) {
    this._redraw = true;
    this._renderer && this._renderer.dirty(item);
  },
  // -- GET / SET ----

  description(text) {
    if (arguments.length) {
      const desc = text != null ? text + '' : null;
      if (desc !== this._desc) extension_ariaLabel(this._el, this._desc = desc);
      return this;
    }
    return this._desc;
  },
  container() {
    return this._el;
  },
  scenegraph() {
    return this._scenegraph;
  },
  origin() {
    return this._origin.slice();
  },
  signal(name, value, options) {
    const op = extension_lookupSignal(this, name);
    return arguments.length === 1 ? op.value : this.update(op, value, options);
  },
  width(_) {
    return arguments.length ? this.signal('width', _) : this.signal('width');
  },
  height(_) {
    return arguments.length ? this.signal('height', _) : this.signal('height');
  },
  padding(_) {
    return arguments.length ? this.signal('padding', extension_padding(_)) : extension_padding(this.signal('padding'));
  },
  autosize(_) {
    return arguments.length ? this.signal('autosize', _) : this.signal('autosize');
  },
  background(_) {
    return arguments.length ? this.signal('background', _) : this.signal('background');
  },
  renderer(type) {
    if (!arguments.length) return this._renderType;
    if (!extension_renderModule(type)) extension_vega_util_module_error('Unrecognized renderer type: ' + type);
    if (type !== this._renderType) {
      this._renderType = type;
      this._resetRenderer();
    }
    return this;
  },
  tooltip(handler) {
    if (!arguments.length) return this._tooltip;
    if (handler !== this._tooltip) {
      this._tooltip = handler;
      this._resetRenderer();
    }
    return this;
  },
  loader(loader) {
    if (!arguments.length) return this._loader;
    if (loader !== this._loader) {
      extension_Dataflow.prototype.loader.call(this, loader);
      this._resetRenderer();
    }
    return this;
  },
  resize() {
    // set flag to perform autosize
    this._autosize = 1;
    // touch autosize signal to ensure top-level ViewLayout runs
    return this.touch(extension_lookupSignal(this, 'autosize'));
  },
  _resetRenderer() {
    if (this._renderer) {
      this._renderer = null;
      this.initialize(this._el, this._elBind);
    }
  },
  // -- SIZING ----
  _resizeView: extension_resizeView,
  // -- EVENT HANDLING ----

  addEventListener(type, handler, options) {
    let callback = handler;
    if (!(options && options.trap === false)) {
      // wrap callback in error handler
      callback = extension_trap(this, handler);
      callback.raw = handler;
    }
    this._handler.on(type, callback);
    return this;
  },
  removeEventListener(type, handler) {
    var handlers = this._handler.handlers(type),
      i = handlers.length,
      h,
      t;

    // search registered handlers, remove if match found
    while (--i >= 0) {
      t = handlers[i].type;
      h = handlers[i].handler;
      if (type === t && (handler === h || handler === h.raw)) {
        this._handler.off(t, h);
        break;
      }
    }
    return this;
  },
  addResizeListener(handler) {
    const l = this._resizeListeners;
    if (!l.includes(handler)) {
      // add handler if it isn't already registered
      // note: error trapping handled elsewhere, so
      // no need to wrap handlers here
      l.push(handler);
    }
    return this;
  },
  removeResizeListener(handler) {
    var l = this._resizeListeners,
      i = l.indexOf(handler);
    if (i >= 0) {
      l.splice(i, 1);
    }
    return this;
  },
  addSignalListener(name, handler) {
    return extension_addOperatorListener(this, name, extension_lookupSignal(this, name), handler);
  },
  removeSignalListener(name, handler) {
    return extension_removeOperatorListener(this, extension_lookupSignal(this, name), handler);
  },
  addDataListener(name, handler) {
    return extension_addOperatorListener(this, name, extension_dataref(this, name).values, handler);
  },
  removeDataListener(name, handler) {
    return extension_removeOperatorListener(this, extension_dataref(this, name).values, handler);
  },
  globalCursor(_) {
    if (arguments.length) {
      if (this._globalCursor !== !!_) {
        const prev = extension_setCursor(this, null); // clear previous cursor
        this._globalCursor = !!_;
        if (prev) extension_setCursor(this, prev); // swap cursor
      }
      return this;
    } else {
      return this._globalCursor;
    }
  },
  preventDefault(_) {
    if (arguments.length) {
      this._preventDefault = _;
      return this;
    } else {
      return this._preventDefault;
    }
  },
  timer: extension_vega_view_module_timer,
  events: extension_vega_view_module_events,
  finalize: extension_finalize,
  hover: extension_vega_view_module_hover,
  // -- DATA ----
  data: extension_vega_view_module_data,
  change: extension_change,
  insert: extension_vega_view_module_insert,
  remove: extension_vega_view_module_remove,
  // -- SCALES --
  scale: extension_vega_view_module_scale,
  // -- INITIALIZATION ----
  initialize: extension_vega_view_module_initialize,
  // -- HEADLESS RENDERING ----
  toImageURL: extension_renderToImageURL,
  toCanvas: extension_renderToCanvas,
  toSVG: extension_renderToSVG,
  // -- SAVE / RESTORE STATE ----
  getState: extension_vega_view_module_getState,
  setState: extension_vega_view_module_setState,
  // RE-RENDER ON ZOOM
  _watchPixelRatio: extension_watchPixelRatio
});



;// ../../node_modules/vega-event-selector/build/vega-event-selector.module.js
const extension_vega_event_selector_module_VIEW = 'view',
  extension_LBRACK = '[',
  extension_RBRACK = ']',
  extension_LBRACE = '{',
  extension_RBRACE = '}',
  extension_COLON = ':',
  extension_COMMA = ',',
  extension_NAME = '@',
  extension_GT = '>',
  extension_vega_event_selector_module_ILLEGAL = /[[\]{}]/,
  extension_DEFAULT_MARKS = {
    '*': 1,
    arc: 1,
    area: 1,
    group: 1,
    image: 1,
    line: 1,
    path: 1,
    rect: 1,
    rule: 1,
    shape: 1,
    symbol: 1,
    text: 1,
    trail: 1
  };
let extension_DEFAULT_SOURCE, extension_MARKS;

/**
 * Parse an event selector string.
 * Returns an array of event stream definitions.
 */
function extension_eventSelector (selector, source, marks) {
  extension_DEFAULT_SOURCE = source || extension_vega_event_selector_module_VIEW;
  extension_MARKS = marks || extension_DEFAULT_MARKS;
  return extension_parseMerge(selector.trim()).map(extension_parseSelector);
}
function extension_isMarkType(type) {
  return extension_MARKS[type];
}
function extension_vega_event_selector_module_find(s, i, endChar, pushChar, popChar) {
  const n = s.length;
  let count = 0,
    c;
  for (; i < n; ++i) {
    c = s[i];
    if (!count && c === endChar) return i;else if (popChar && popChar.indexOf(c) >= 0) --count;else if (pushChar && pushChar.indexOf(c) >= 0) ++count;
  }
  return i;
}
function extension_parseMerge(s) {
  const output = [],
    n = s.length;
  let start = 0,
    i = 0;
  while (i < n) {
    i = extension_vega_event_selector_module_find(s, i, extension_COMMA, extension_LBRACK + extension_LBRACE, extension_RBRACK + extension_RBRACE);
    output.push(s.substring(start, i).trim());
    start = ++i;
  }
  if (output.length === 0) {
    throw 'Empty event selector: ' + s;
  }
  return output;
}
function extension_parseSelector(s) {
  return s[0] === '[' ? extension_parseBetween(s) : extension_vega_event_selector_module_parseStream(s);
}
function extension_parseBetween(s) {
  const n = s.length;
  let i = 1,
    b;
  i = extension_vega_event_selector_module_find(s, i, extension_RBRACK, extension_LBRACK, extension_RBRACK);
  if (i === n) {
    throw 'Empty between selector: ' + s;
  }
  b = extension_parseMerge(s.substring(1, i));
  if (b.length !== 2) {
    throw 'Between selector must have two elements: ' + s;
  }
  s = s.slice(i + 1).trim();
  if (s[0] !== extension_GT) {
    throw 'Expected \'>\' after between selector: ' + s;
  }
  b = b.map(extension_parseSelector);
  const stream = extension_parseSelector(s.slice(1).trim());
  if (stream.between) {
    return {
      between: b,
      stream: stream
    };
  } else {
    stream.between = b;
  }
  return stream;
}
function extension_vega_event_selector_module_parseStream(s) {
  const stream = {
      source: extension_DEFAULT_SOURCE
    },
    source = [];
  let throttle = [0, 0],
    markname = 0,
    start = 0,
    n = s.length,
    i = 0,
    j,
    filter;

  // extract throttle from end
  if (s[n - 1] === extension_RBRACE) {
    i = s.lastIndexOf(extension_LBRACE);
    if (i >= 0) {
      try {
        throttle = extension_parseThrottle(s.substring(i + 1, n - 1));
      } catch (e) {
        throw 'Invalid throttle specification: ' + s;
      }
      s = s.slice(0, i).trim();
      n = s.length;
    } else throw 'Unmatched right brace: ' + s;
    i = 0;
  }
  if (!n) throw s;

  // set name flag based on first char
  if (s[0] === extension_NAME) markname = ++i;

  // extract first part of multi-part stream selector
  j = extension_vega_event_selector_module_find(s, i, extension_COLON);
  if (j < n) {
    source.push(s.substring(start, j).trim());
    start = i = ++j;
  }

  // extract remaining part of stream selector
  i = extension_vega_event_selector_module_find(s, i, extension_LBRACK);
  if (i === n) {
    source.push(s.substring(start, n).trim());
  } else {
    source.push(s.substring(start, i).trim());
    filter = [];
    start = ++i;
    if (start === n) throw 'Unmatched left bracket: ' + s;
  }

  // extract filters
  while (i < n) {
    i = extension_vega_event_selector_module_find(s, i, extension_RBRACK);
    if (i === n) throw 'Unmatched left bracket: ' + s;
    filter.push(s.substring(start, i).trim());
    if (i < n - 1 && s[++i] !== extension_LBRACK) throw 'Expected left bracket: ' + s;
    start = ++i;
  }

  // marshall event stream specification
  if (!(n = source.length) || extension_vega_event_selector_module_ILLEGAL.test(source[n - 1])) {
    throw 'Invalid event selector: ' + s;
  }
  if (n > 1) {
    stream.type = source[1];
    if (markname) {
      stream.markname = source[0].slice(1);
    } else if (extension_isMarkType(source[0])) {
      stream.marktype = source[0];
    } else {
      stream.source = source[0];
    }
  } else {
    stream.type = source[0];
  }
  if (stream.type.slice(-1) === '!') {
    stream.consume = true;
    stream.type = stream.type.slice(0, -1);
  }
  if (filter != null) stream.filter = filter;
  if (throttle[0]) stream.throttle = throttle[0];
  if (throttle[1]) stream.debounce = throttle[1];
  return stream;
}
function extension_parseThrottle(s) {
  const a = s.split(extension_COMMA);
  if (!s.length || a.length > 2) throw s;
  return a.map(_ => {
    const x = +_;
    if (x !== x) throw s;
    return x;
  });
}



;// ../../node_modules/vega-parser/build/vega-parser.module.js






function extension_parseAutosize (spec) {
  return extension_vega_util_module_isObject(spec) ? spec : {
    type: spec || 'pad'
  };
}

const extension_vega_parser_module_number = _ => +_ || 0;
const extension_vega_parser_module_paddingObject = _ => ({
  top: _,
  bottom: _,
  left: _,
  right: _
});
function extension_parsePadding (spec) {
  return !extension_vega_util_module_isObject(spec) ? extension_vega_parser_module_paddingObject(extension_vega_parser_module_number(spec)) : spec.signal ? spec : {
    top: extension_vega_parser_module_number(spec.top),
    bottom: extension_vega_parser_module_number(spec.bottom),
    left: extension_vega_parser_module_number(spec.left),
    right: extension_vega_parser_module_number(spec.right)
  };
}

const extension_vega_parser_module_encoder = _ => extension_vega_util_module_isObject(_) && !extension_vega_util_module_isArray(_) ? extension_extend({}, _) : {
  value: _
};
function extension_addEncode(object, name, value, set) {
  if (value != null) {
    const isEncoder = extension_vega_util_module_isObject(value) && !extension_vega_util_module_isArray(value) || extension_vega_util_module_isArray(value) && value.length && extension_vega_util_module_isObject(value[0]);

    // Always assign signal to update, even if the signal is from the enter block
    if (isEncoder) {
      object.update[name] = value;
    } else {
      object[set || 'enter'][name] = {
        value: value
      };
    }
    return 1;
  } else {
    return 0;
  }
}
function extension_addEncoders(object, enter, update) {
  for (const name in enter) {
    extension_addEncode(object, name, enter[name]);
  }
  for (const name in update) {
    extension_addEncode(object, name, update[name], 'update');
  }
}
function extension_extendEncode(encode, extra, skip) {
  for (const name in extra) {
    if (skip && extension_vega_util_module_has(skip, name)) continue;
    encode[name] = extension_extend(encode[name] || {}, extra[name]);
  }
  return encode;
}
function extension_vega_parser_module_has(key, encode) {
  return encode && (encode.enter && encode.enter[key] || encode.update && encode.update[key]);
}

const extension_MarkRole = 'mark';
const extension_vega_parser_module_FrameRole = 'frame';
const extension_vega_parser_module_ScopeRole = 'scope';
const extension_vega_parser_module_AxisRole = 'axis';
const extension_AxisDomainRole = 'axis-domain';
const extension_AxisGridRole = 'axis-grid';
const extension_AxisLabelRole = 'axis-label';
const extension_AxisTickRole = 'axis-tick';
const extension_AxisTitleRole = 'axis-title';
const extension_vega_parser_module_LegendRole = 'legend';
const extension_LegendBandRole = 'legend-band';
const extension_LegendEntryRole = 'legend-entry';
const extension_LegendGradientRole = 'legend-gradient';
const extension_LegendLabelRole = 'legend-label';
const extension_LegendSymbolRole = 'legend-symbol';
const extension_LegendTitleRole = 'legend-title';
const extension_vega_parser_module_TitleRole = 'title';
const extension_TitleTextRole = 'title-text';
const extension_TitleSubtitleRole = 'title-subtitle';

function extension_applyDefaults (encode, type, role, style, config) {
  const defaults = {},
    enter = {};
  let update, key, skip, props;

  // if text mark, apply global lineBreak settings (#2370)
  key = 'lineBreak';
  if (type === 'text' && config[key] != null && !extension_vega_parser_module_has(key, encode)) {
    extension_applyDefault(defaults, key, config[key]);
  }

  // ignore legend and axis roles
  if (role == 'legend' || String(role).startsWith('axis')) {
    role = null;
  }

  // resolve mark config
  props = role === extension_vega_parser_module_FrameRole ? config.group : role === extension_MarkRole ? extension_extend({}, config.mark, config[type]) : null;
  for (key in props) {
    // do not apply defaults if relevant fields are defined
    skip = extension_vega_parser_module_has(key, encode) || (key === 'fill' || key === 'stroke') && (extension_vega_parser_module_has('fill', encode) || extension_vega_parser_module_has('stroke', encode));
    if (!skip) extension_applyDefault(defaults, key, props[key]);
  }

  // resolve styles, apply with increasing precedence
  extension_vega_util_module_array(style).forEach(name => {
    const props = config.style && config.style[name];
    for (const key in props) {
      if (!extension_vega_parser_module_has(key, encode)) {
        extension_applyDefault(defaults, key, props[key]);
      }
    }
  });
  encode = extension_extend({}, encode); // defensive copy
  for (key in defaults) {
    props = defaults[key];
    if (props.signal) {
      (update = update || {})[key] = props;
    } else {
      enter[key] = props;
    }
  }
  encode.enter = extension_extend(enter, encode.enter);
  if (update) encode.update = extension_extend(update, encode.update);
  return encode;
}
function extension_applyDefault(defaults, key, value) {
  defaults[key] = value && value.signal ? {
    signal: value.signal
  } : {
    value: value
  };
}

const extension_scaleRef = scale => extension_vega_util_module_isString(scale) ? extension_$(scale) : scale.signal ? `(${scale.signal})` : extension_vega_parser_module_field(scale);
function extension_entry$1(enc) {
  if (enc.gradient != null) {
    return extension_vega_parser_module_gradient(enc);
  }
  let value = enc.signal ? `(${enc.signal})` : enc.color ? extension_vega_parser_module_color(enc.color) : enc.field != null ? extension_vega_parser_module_field(enc.field) : enc.value !== undefined ? extension_$(enc.value) : undefined;
  if (enc.scale != null) {
    value = extension_vega_parser_module_scale(enc, value);
  }
  if (value === undefined) {
    value = null;
  }
  if (enc.exponent != null) {
    value = `pow(${value},${extension_property(enc.exponent)})`;
  }
  if (enc.mult != null) {
    value += `*${extension_property(enc.mult)}`;
  }
  if (enc.offset != null) {
    value += `+${extension_property(enc.offset)}`;
  }
  if (enc.round) {
    value = `round(${value})`;
  }
  return value;
}
const src_extension_color = (type, x, y, z) => `(${type}(${[x, y, z].map(extension_entry$1).join(',')})+'')`;
function extension_vega_parser_module_color(enc) {
  return enc.c ? src_extension_color('hcl', enc.h, enc.c, enc.l) : enc.h || enc.s ? src_extension_color('hsl', enc.h, enc.s, enc.l) : enc.l || enc.a ? src_extension_color('lab', enc.l, enc.a, enc.b) : enc.r || enc.g || enc.b ? src_extension_color('rgb', enc.r, enc.g, enc.b) : null;
}
function extension_vega_parser_module_gradient(enc) {
  // map undefined to null; expression lang does not allow undefined
  const args = [enc.start, enc.stop, enc.count].map(_ => _ == null ? null : extension_$(_));

  // trim null inputs from the end
  while (args.length && extension_peek(args) == null) args.pop();
  args.unshift(extension_scaleRef(enc.gradient));
  return `gradient(${args.join(',')})`;
}
function extension_property(property) {
  return extension_vega_util_module_isObject(property) ? '(' + extension_entry$1(property) + ')' : property;
}
function extension_vega_parser_module_field(ref) {
  return extension_resolveField(extension_vega_util_module_isObject(ref) ? ref : {
    datum: ref
  });
}
function extension_resolveField(ref) {
  let object, level, field;
  if (ref.signal) {
    object = 'datum';
    field = ref.signal;
  } else if (ref.group || ref.parent) {
    level = Math.max(1, ref.level || 1);
    object = 'item';
    while (level-- > 0) {
      object += '.mark.group';
    }
    if (ref.parent) {
      field = ref.parent;
      object += '.datum';
    } else {
      field = ref.group;
    }
  } else if (ref.datum) {
    object = 'datum';
    field = ref.datum;
  } else {
    extension_vega_util_module_error('Invalid field reference: ' + extension_$(ref));
  }
  if (!ref.signal) {
    field = extension_vega_util_module_isString(field) ? extension_splitAccessPath(field).map(extension_$).join('][') : extension_resolveField(field);
  }
  return object + '[' + field + ']';
}
function extension_vega_parser_module_scale(enc, value) {
  const scale = extension_scaleRef(enc.scale);
  if (enc.range != null) {
    // pull value from scale range
    value = `lerp(_range(${scale}), ${+enc.range})`;
  } else {
    // run value through scale and/or pull scale bandwidth
    if (value !== undefined) value = `_scale(${scale}, ${value})`;
    if (enc.band) {
      value = (value ? value + '+' : '') + `_bandwidth(${scale})` + (+enc.band === 1 ? '' : '*' + extension_property(enc.band));
      if (enc.extra) {
        // include logic to handle extraneous elements
        value = `(datum.extra ? _scale(${scale}, datum.extra.value) : ${value})`;
      }
    }
    if (value == null) value = '0';
  }
  return value;
}

function extension_vega_parser_module_rule (enc) {
  let code = '';
  enc.forEach(rule => {
    const value = extension_entry$1(rule);
    code += rule.test ? `(${rule.test})?${value}:` : value;
  });

  // if no else clause, terminate with null (#1366)
  if (extension_peek(code) === ':') {
    code += 'null';
  }
  return code;
}

function extension_parseEncode (encode, type, role, style, scope, params) {
  const enc = {};
  params = params || {};
  params.encoders = {
    $encode: enc
  };
  encode = extension_applyDefaults(encode, type, role, style, scope.config);
  for (const key in encode) {
    enc[key] = extension_parseBlock(encode[key], type, params, scope);
  }
  return params;
}
function extension_parseBlock(block, marktype, params, scope) {
  const channels = {},
    fields = {};
  for (const name in block) {
    if (block[name] != null) {
      // skip any null entries
      channels[name] = extension_parse$1(extension_expr(block[name]), scope, params, fields);
    }
  }
  return {
    $expr: {
      marktype,
      channels
    },
    $fields: Object.keys(fields),
    $output: Object.keys(block)
  };
}
function extension_expr(enc) {
  return extension_vega_util_module_isArray(enc) ? extension_vega_parser_module_rule(enc) : extension_entry$1(enc);
}
function extension_parse$1(code, scope, params, fields) {
  const expr = extension_vega_functions_module_parser(code, scope);
  expr.$fields.forEach(name => fields[name] = 1);
  extension_extend(params, expr.$params);
  return expr.$expr;
}

const extension_OUTER = 'outer',
  extension_OUTER_INVALID = ['value', 'update', 'init', 'react', 'bind'];
function extension_outerError(prefix, name) {
  extension_vega_util_module_error(prefix + ' for "outer" push: ' + extension_$(name));
}
function extension_parseSignal (signal, scope) {
  const name = signal.name;
  if (signal.push === extension_OUTER) {
    // signal must already be defined, raise error if not
    if (!scope.signals[name]) extension_outerError('No prior signal definition', name);
    // signal push must not use properties reserved for standard definition
    extension_OUTER_INVALID.forEach(prop => {
      if (signal[prop] !== undefined) extension_outerError('Invalid property ', prop);
    });
  } else {
    // define a new signal in the current scope
    const op = scope.addSignal(name, signal.value);
    if (signal.react === false) op.react = false;
    if (signal.bind) scope.addBinding(name, signal.bind);
  }
}

function extension_Entry(type, value, params, parent) {
  this.id = -1;
  this.type = type;
  this.value = value;
  this.params = params;
  if (parent) this.parent = parent;
}
function extension_entry(type, value, params, parent) {
  return new extension_Entry(type, value, params, parent);
}
function extension_operator(value, params) {
  return extension_entry('operator', value, params);
}

// -----

function extension_vega_parser_module_ref(op) {
  const ref = {
    $ref: op.id
  };
  // if operator not yet registered, cache ref to resolve later
  if (op.id < 0) (op.refs = op.refs || []).push(ref);
  return ref;
}
function extension_fieldRef$1(field, name) {
  return name ? {
    $field: field,
    $name: name
  } : {
    $field: field
  };
}
const extension_keyFieldRef = extension_fieldRef$1('key');
function extension_compareRef(fields, orders) {
  return {
    $compare: fields,
    $order: orders
  };
}
function extension_keyRef(fields, flat) {
  const ref = {
    $key: fields
  };
  if (flat) ref.$flat = true;
  return ref;
}

// -----

const extension_Ascending = 'ascending';
const extension_vega_parser_module_Descending = 'descending';
function extension_sortKey(sort) {
  return !extension_vega_util_module_isObject(sort) ? '' : (sort.order === extension_vega_parser_module_Descending ? '-' : '+') + extension_aggrField(sort.op, sort.field);
}
function extension_aggrField(op, field) {
  return (op && op.signal ? '$' + op.signal : op || '') + (op && field ? '_' : '') + (field && field.signal ? '$' + field.signal : field || '');
}

// -----

const extension_Scope$1 = 'scope';
const extension_vega_parser_module_View = 'view';
function extension_isSignal(_) {
  return _ && _.signal;
}
function extension_isExpr$1(_) {
  return _ && _.expr;
}
function extension_hasSignal(_) {
  if (extension_isSignal(_)) return true;
  if (extension_vega_util_module_isObject(_)) for (const key in _) {
    if (extension_hasSignal(_[key])) return true;
  }
  return false;
}
function extension_vega_parser_module_value(specValue, defaultValue) {
  return specValue != null ? specValue : defaultValue;
}
function extension_deref(v) {
  return v && v.signal || v;
}

const extension_vega_parser_module_Timer = 'timer';
function extension_vega_parser_module_parseStream(stream, scope) {
  const method = stream.merge ? extension_mergeStream : stream.stream ? extension_nestedStream : stream.type ? extension_eventStream : extension_vega_util_module_error('Invalid stream specification: ' + extension_$(stream));
  return method(stream, scope);
}
function extension_eventSource(source) {
  return source === extension_Scope$1 ? extension_vega_parser_module_View : source || extension_vega_parser_module_View;
}
function extension_mergeStream(stream, scope) {
  const list = stream.merge.map(s => extension_vega_parser_module_parseStream(s, scope)),
    entry = extension_streamParameters({
      merge: list
    }, stream, scope);
  return scope.addStream(entry).id;
}
function extension_nestedStream(stream, scope) {
  const id = extension_vega_parser_module_parseStream(stream.stream, scope),
    entry = extension_streamParameters({
      stream: id
    }, stream, scope);
  return scope.addStream(entry).id;
}
function extension_eventStream(stream, scope) {
  let id;
  if (stream.type === extension_vega_parser_module_Timer) {
    id = scope.event(extension_vega_parser_module_Timer, stream.throttle);
    stream = {
      between: stream.between,
      filter: stream.filter
    };
  } else {
    id = scope.event(extension_eventSource(stream.source), stream.type);
  }
  const entry = extension_streamParameters({
    stream: id
  }, stream, scope);
  return Object.keys(entry).length === 1 ? id : scope.addStream(entry).id;
}
function extension_streamParameters(entry, stream, scope) {
  let param = stream.between;
  if (param) {
    if (param.length !== 2) {
      extension_vega_util_module_error('Stream "between" parameter must have 2 entries: ' + extension_$(stream));
    }
    entry.between = [extension_vega_parser_module_parseStream(param[0], scope), extension_vega_parser_module_parseStream(param[1], scope)];
  }
  param = stream.filter ? [].concat(stream.filter) : [];
  if (stream.marktype || stream.markname || stream.markrole) {
    // add filter for mark type, name and/or role
    param.push(extension_filterMark(stream.marktype, stream.markname, stream.markrole));
  }
  if (stream.source === extension_Scope$1) {
    // add filter to limit events from sub-scope only
    param.push('inScope(event.item)');
  }
  if (param.length) {
    entry.filter = extension_vega_functions_module_parser('(' + param.join(')&&(') + ')', scope).$expr;
  }
  if ((param = stream.throttle) != null) {
    entry.throttle = +param;
  }
  if ((param = stream.debounce) != null) {
    entry.debounce = +param;
  }
  if (stream.consume) {
    entry.consume = true;
  }
  return entry;
}
function extension_filterMark(type, name, role) {
  const item = 'event.item';
  return item + (type && type !== '*' ? '&&' + item + '.mark.marktype===\'' + type + '\'' : '') + (role ? '&&' + item + '.mark.role===\'' + role + '\'' : '') + (name ? '&&' + item + '.mark.name===\'' + name + '\'' : '');
}

// bypass expression parser for internal operator references
const extension_OP_VALUE_EXPR = {
  code: '_.$value',
  ast: {
    type: 'Identifier',
    value: 'value'
  }
};
function extension_vega_parser_module_parseUpdate (spec, scope, target) {
  const encode = spec.encode,
    entry = {
      target: target
    };
  let events = spec.events,
    update = spec.update,
    sources = [];
  if (!events) {
    extension_vega_util_module_error('Signal update missing events specification.');
  }

  // interpret as an event selector string
  if (extension_vega_util_module_isString(events)) {
    events = extension_eventSelector(events, scope.isSubscope() ? extension_Scope$1 : extension_vega_parser_module_View);
  }

  // separate event streams from signal updates
  events = extension_vega_util_module_array(events).filter(s => s.signal || s.scale ? (sources.push(s), 0) : 1);

  // merge internal operator listeners
  if (sources.length > 1) {
    sources = [extension_mergeSources(sources)];
  }

  // merge event streams, include as source
  if (events.length) {
    sources.push(events.length > 1 ? {
      merge: events
    } : events[0]);
  }
  if (encode != null) {
    if (update) extension_vega_util_module_error('Signal encode and update are mutually exclusive.');
    update = 'encode(item(),' + extension_$(encode) + ')';
  }

  // resolve update value
  entry.update = extension_vega_util_module_isString(update) ? extension_vega_functions_module_parser(update, scope) : update.expr != null ? extension_vega_functions_module_parser(update.expr, scope) : update.value != null ? update.value : update.signal != null ? {
    $expr: extension_OP_VALUE_EXPR,
    $params: {
      $value: scope.signalRef(update.signal)
    }
  } : extension_vega_util_module_error('Invalid signal update specification.');
  if (spec.force) {
    entry.options = {
      force: true
    };
  }
  sources.forEach(source => scope.addUpdate(extension_extend(extension_streamSource(source, scope), entry)));
}
function extension_streamSource(stream, scope) {
  return {
    source: stream.signal ? scope.signalRef(stream.signal) : stream.scale ? scope.scaleRef(stream.scale) : extension_vega_parser_module_parseStream(stream, scope)
  };
}
function extension_mergeSources(sources) {
  return {
    signal: '[' + sources.map(s => s.scale ? 'scale("' + s.scale + '")' : s.signal) + ']'
  };
}

function extension_parseSignalUpdates (signal, scope) {
  const op = scope.getSignal(signal.name);
  let expr = signal.update;
  if (signal.init) {
    if (expr) {
      extension_vega_util_module_error('Signals can not include both init and update expressions.');
    } else {
      expr = signal.init;
      op.initonly = true;
    }
  }
  if (expr) {
    expr = extension_vega_functions_module_parser(expr, scope);
    op.update = expr.$expr;
    op.params = expr.$params;
  }
  if (signal.on) {
    signal.on.forEach(_ => extension_vega_parser_module_parseUpdate(_, scope, op.id));
  }
}

const extension_vega_parser_module_transform = name => (params, value, parent) => extension_entry(name, value, params || undefined, parent);
const extension_vega_parser_module_Aggregate = extension_vega_parser_module_transform('aggregate');
const extension_vega_parser_module_AxisTicks = extension_vega_parser_module_transform('axisticks');
const extension_vega_parser_module_Bound = extension_vega_parser_module_transform('bound');
const extension_vega_parser_module_Collect = extension_vega_parser_module_transform('collect');
const extension_vega_parser_module_Compare = extension_vega_parser_module_transform('compare');
const extension_vega_parser_module_DataJoin = extension_vega_parser_module_transform('datajoin');
const extension_vega_parser_module_Encode = extension_vega_parser_module_transform('encode');
const extension_vega_parser_module_Expression = extension_vega_parser_module_transform('expression');
const extension_vega_parser_module_Facet = extension_vega_parser_module_transform('facet');
const extension_vega_parser_module_Field = extension_vega_parser_module_transform('field');
const extension_vega_parser_module_Key = extension_vega_parser_module_transform('key');
const extension_vega_parser_module_LegendEntries = extension_vega_parser_module_transform('legendentries');
const extension_vega_parser_module_Load = extension_vega_parser_module_transform('load');
const extension_vega_parser_module_Mark = extension_vega_parser_module_transform('mark');
const extension_vega_parser_module_MultiExtent = extension_vega_parser_module_transform('multiextent');
const extension_vega_parser_module_MultiValues = extension_vega_parser_module_transform('multivalues');
const extension_vega_parser_module_Overlap = extension_vega_parser_module_transform('overlap');
const extension_vega_parser_module_Params = extension_vega_parser_module_transform('params');
const extension_vega_parser_module_PreFacet = extension_vega_parser_module_transform('prefacet');
const extension_vega_parser_module_Projection = extension_vega_parser_module_transform('projection');
const extension_vega_parser_module_Proxy = extension_vega_parser_module_transform('proxy');
const extension_vega_parser_module_Relay = extension_vega_parser_module_transform('relay');
const extension_vega_parser_module_Render = extension_vega_parser_module_transform('render');
const extension_vega_parser_module_Scale = extension_vega_parser_module_transform('scale');
const extension_vega_parser_module_Sieve = extension_vega_parser_module_transform('sieve');
const extension_vega_parser_module_SortItems = extension_vega_parser_module_transform('sortitems');
const extension_vega_parser_module_ViewLayout = extension_vega_parser_module_transform('viewlayout');
const extension_vega_parser_module_Values = extension_vega_parser_module_transform('values');

let extension_FIELD_REF_ID = 0;
const extension_MULTIDOMAIN_SORT_OPS = {
  min: 'min',
  max: 'max',
  count: 'sum'
};
function extension_initScale(spec, scope) {
  const type = spec.type || 'linear';
  if (!extension_isValidScaleType(type)) {
    extension_vega_util_module_error('Unrecognized scale type: ' + extension_$(type));
  }
  scope.addScale(spec.name, {
    type,
    domain: undefined
  });
}
function extension_parseScale(spec, scope) {
  const params = scope.getScale(spec.name).params;
  let key;
  params.domain = extension_parseScaleDomain(spec.domain, spec, scope);
  if (spec.range != null) {
    params.range = extension_parseScaleRange(spec, scope, params);
  }
  if (spec.interpolate != null) {
    extension_parseScaleInterpolate(spec.interpolate, params);
  }
  if (spec.nice != null) {
    params.nice = extension_parseScaleNice(spec.nice, scope);
  }
  if (spec.bins != null) {
    params.bins = extension_parseScaleBins(spec.bins, scope);
  }
  for (key in spec) {
    if (extension_vega_util_module_has(params, key) || key === 'name') continue;
    params[key] = extension_parseLiteral(spec[key], scope);
  }
}
function extension_parseLiteral(v, scope) {
  return !extension_vega_util_module_isObject(v) ? v : v.signal ? scope.signalRef(v.signal) : extension_vega_util_module_error('Unsupported object: ' + extension_$(v));
}
function extension_parseArray(v, scope) {
  return v.signal ? scope.signalRef(v.signal) : v.map(v => extension_parseLiteral(v, scope));
}
function extension_dataLookupError(name) {
  extension_vega_util_module_error('Can not find data set: ' + extension_$(name));
}

// -- SCALE DOMAIN ----

function extension_parseScaleDomain(domain, spec, scope) {
  if (!domain) {
    if (spec.domainMin != null || spec.domainMax != null) {
      extension_vega_util_module_error('No scale domain defined for domainMin/domainMax to override.');
    }
    return; // default domain
  }
  return domain.signal ? scope.signalRef(domain.signal) : (extension_vega_util_module_isArray(domain) ? extension_explicitDomain : domain.fields ? extension_multipleDomain : extension_singularDomain)(domain, spec, scope);
}
function extension_explicitDomain(domain, spec, scope) {
  return domain.map(v => extension_parseLiteral(v, scope));
}
function extension_singularDomain(domain, spec, scope) {
  const data = scope.getData(domain.data);
  if (!data) extension_dataLookupError(domain.data);
  return extension_isDiscrete(spec.type) ? data.valuesRef(scope, domain.field, extension_parseSort(domain.sort, false)) : extension_isQuantile(spec.type) ? data.domainRef(scope, domain.field) : data.extentRef(scope, domain.field);
}
function extension_multipleDomain(domain, spec, scope) {
  const data = domain.data,
    fields = domain.fields.reduce((dom, d) => {
      d = extension_vega_util_module_isString(d) ? {
        data: data,
        field: d
      } : extension_vega_util_module_isArray(d) || d.signal ? extension_vega_parser_module_fieldRef(d, scope) : d;
      dom.push(d);
      return dom;
    }, []);
  return (extension_isDiscrete(spec.type) ? extension_ordinalMultipleDomain : extension_isQuantile(spec.type) ? extension_quantileMultipleDomain : extension_numericMultipleDomain)(domain, scope, fields);
}
function extension_vega_parser_module_fieldRef(data, scope) {
  const name = '_:vega:_' + extension_FIELD_REF_ID++,
    coll = extension_vega_parser_module_Collect({});
  if (extension_vega_util_module_isArray(data)) {
    coll.value = {
      $ingest: data
    };
  } else if (data.signal) {
    const code = 'setdata(' + extension_$(name) + ',' + data.signal + ')';
    coll.params.input = scope.signalRef(code);
  }
  scope.addDataPipeline(name, [coll, extension_vega_parser_module_Sieve({})]);
  return {
    data: name,
    field: 'data'
  };
}
function extension_ordinalMultipleDomain(domain, scope, fields) {
  const sort = extension_parseSort(domain.sort, true);
  let a, v;

  // get value counts for each domain field
  const counts = fields.map(f => {
    const data = scope.getData(f.data);
    if (!data) extension_dataLookupError(f.data);
    return data.countsRef(scope, f.field, sort);
  });

  // aggregate the results from each domain field
  const p = {
    groupby: extension_keyFieldRef,
    pulse: counts
  };
  if (sort) {
    a = sort.op || 'count';
    v = sort.field ? extension_aggrField(a, sort.field) : 'count';
    p.ops = [extension_MULTIDOMAIN_SORT_OPS[a]];
    p.fields = [scope.fieldRef(v)];
    p.as = [v];
  }
  a = scope.add(extension_vega_parser_module_Aggregate(p));

  // collect aggregate output
  const c = scope.add(extension_vega_parser_module_Collect({
    pulse: extension_vega_parser_module_ref(a)
  }));

  // extract values for combined domain
  v = scope.add(extension_vega_parser_module_Values({
    field: extension_keyFieldRef,
    sort: scope.sortRef(sort),
    pulse: extension_vega_parser_module_ref(c)
  }));
  return extension_vega_parser_module_ref(v);
}
function extension_parseSort(sort, multidomain) {
  if (sort) {
    if (!sort.field && !sort.op) {
      if (extension_vega_util_module_isObject(sort)) sort.field = 'key';else sort = {
        field: 'key'
      };
    } else if (!sort.field && sort.op !== 'count') {
      extension_vega_util_module_error('No field provided for sort aggregate op: ' + sort.op);
    } else if (multidomain && sort.field) {
      if (sort.op && !extension_MULTIDOMAIN_SORT_OPS[sort.op]) {
        extension_vega_util_module_error('Multiple domain scales can not be sorted using ' + sort.op);
      }
    }
  }
  return sort;
}
function extension_quantileMultipleDomain(domain, scope, fields) {
  // get value arrays for each domain field
  const values = fields.map(f => {
    const data = scope.getData(f.data);
    if (!data) extension_dataLookupError(f.data);
    return data.domainRef(scope, f.field);
  });

  // combine value arrays
  return extension_vega_parser_module_ref(scope.add(extension_vega_parser_module_MultiValues({
    values: values
  })));
}
function extension_numericMultipleDomain(domain, scope, fields) {
  // get extents for each domain field
  const extents = fields.map(f => {
    const data = scope.getData(f.data);
    if (!data) extension_dataLookupError(f.data);
    return data.extentRef(scope, f.field);
  });

  // combine extents
  return extension_vega_parser_module_ref(scope.add(extension_vega_parser_module_MultiExtent({
    extents: extents
  })));
}

// -- SCALE BINS -----

function extension_parseScaleBins(v, scope) {
  return v.signal || extension_vega_util_module_isArray(v) ? extension_parseArray(v, scope) : scope.objectProperty(v);
}

// -- SCALE NICE -----

function extension_parseScaleNice(nice, scope) {
  return nice.signal ? scope.signalRef(nice.signal) : extension_vega_util_module_isObject(nice) ? {
    interval: extension_parseLiteral(nice.interval),
    step: extension_parseLiteral(nice.step)
  } : extension_parseLiteral(nice);
}

// -- SCALE INTERPOLATION -----

function extension_parseScaleInterpolate(interpolate, params) {
  params.interpolate = extension_parseLiteral(interpolate.type || interpolate);
  if (interpolate.gamma != null) {
    params.interpolateGamma = extension_parseLiteral(interpolate.gamma);
  }
}

// -- SCALE RANGE -----

function extension_parseScaleRange(spec, scope, params) {
  const config = scope.config.range;
  let range = spec.range;
  if (range.signal) {
    return scope.signalRef(range.signal);
  } else if (extension_vega_util_module_isString(range)) {
    if (config && extension_vega_util_module_has(config, range)) {
      spec = extension_extend({}, spec, {
        range: config[range]
      });
      return extension_parseScaleRange(spec, scope, params);
    } else if (range === 'width') {
      range = [0, {
        signal: 'width'
      }];
    } else if (range === 'height') {
      range = extension_isDiscrete(spec.type) ? [0, {
        signal: 'height'
      }] : [{
        signal: 'height'
      }, 0];
    } else {
      extension_vega_util_module_error('Unrecognized scale range value: ' + extension_$(range));
    }
  } else if (range.scheme) {
    params.scheme = extension_vega_util_module_isArray(range.scheme) ? extension_parseArray(range.scheme, scope) : extension_parseLiteral(range.scheme, scope);
    if (range.extent) params.schemeExtent = extension_parseArray(range.extent, scope);
    if (range.count) params.schemeCount = extension_parseLiteral(range.count, scope);
    return;
  } else if (range.step) {
    params.rangeStep = extension_parseLiteral(range.step, scope);
    return;
  } else if (extension_isDiscrete(spec.type) && !extension_vega_util_module_isArray(range)) {
    return extension_parseScaleDomain(range, spec, scope);
  } else if (!extension_vega_util_module_isArray(range)) {
    extension_vega_util_module_error('Unsupported range type: ' + extension_$(range));
  }
  return range.map(v => (extension_vega_util_module_isArray(v) ? extension_parseArray : extension_parseLiteral)(v, scope));
}

function extension_parseProjection (proj, scope) {
  const config = scope.config.projection || {},
    params = {};
  for (const name in proj) {
    if (name === 'name') continue;
    params[name] = extension_parseParameter$1(proj[name], name, scope);
  }

  // apply projection defaults from config
  for (const name in config) {
    if (params[name] == null) {
      params[name] = extension_parseParameter$1(config[name], name, scope);
    }
  }
  scope.addProjection(proj.name, params);
}
function extension_parseParameter$1(_, name, scope) {
  return extension_vega_util_module_isArray(_) ? _.map(_ => extension_parseParameter$1(_, name, scope)) : !extension_vega_util_module_isObject(_) ? _ : _.signal ? scope.signalRef(_.signal) : name === 'fit' ? _ : extension_vega_util_module_error('Unsupported parameter object: ' + extension_$(_));
}

const extension_vega_parser_module_Top = 'top';
const extension_vega_parser_module_Left = 'left';
const extension_vega_parser_module_Right = 'right';
const extension_vega_parser_module_Bottom = 'bottom';
const extension_vega_parser_module_Center = 'center';
const extension_Vertical = 'vertical';
const extension_vega_parser_module_Start = 'start';
const extension_vega_parser_module_Middle = 'middle';
const extension_vega_parser_module_End = 'end';
const extension_Index = 'index';
const extension_vega_parser_module_Label = 'label';
const extension_Offset = 'offset';
const extension_Perc = 'perc';
const extension_Perc2 = 'perc2';
const extension_vega_parser_module_Value = 'value';
const extension_GuideLabelStyle = 'guide-label';
const extension_GuideTitleStyle = 'guide-title';
const extension_GroupTitleStyle = 'group-title';
const extension_GroupSubtitleStyle = 'group-subtitle';
const extension_vega_parser_module_Symbols = 'symbol';
const extension_vega_parser_module_Gradient = 'gradient';
const extension_vega_parser_module_Discrete = 'discrete';
const extension_Size = 'size';
const extension_Shape = 'shape';
const extension_Fill = 'fill';
const extension_Stroke = 'stroke';
const extension_StrokeWidth = 'strokeWidth';
const extension_StrokeDash = 'strokeDash';
const extension_Opacity = 'opacity';

// Encoding channels supported by legends
// In priority order of 'canonical' scale
const extension_LegendScales = [extension_Size, extension_Shape, extension_Fill, extension_Stroke, extension_StrokeWidth, extension_StrokeDash, extension_Opacity];
const extension_vega_parser_module_Skip = {
  name: 1,
  style: 1,
  interactive: 1
};
const extension_vega_parser_module_zero = {
  value: 0
};
const extension_vega_parser_module_one = {
  value: 1
};

const extension_GroupMark = 'group';
const extension_RectMark = 'rect';
const extension_RuleMark = 'rule';
const extension_SymbolMark = 'symbol';
const extension_TextMark = 'text';

function extension_guideGroup (mark) {
  mark.type = extension_GroupMark;
  mark.interactive = mark.interactive || false;
  return mark;
}

function extension_vega_parser_module_lookup(spec, config) {
  const _ = (name, dflt) => extension_vega_parser_module_value(spec[name], extension_vega_parser_module_value(config[name], dflt));
  _.isVertical = s => extension_Vertical === extension_vega_parser_module_value(spec.direction, config.direction || (s ? config.symbolDirection : config.gradientDirection));
  _.gradientLength = () => extension_vega_parser_module_value(spec.gradientLength, config.gradientLength || config.gradientWidth);
  _.gradientThickness = () => extension_vega_parser_module_value(spec.gradientThickness, config.gradientThickness || config.gradientHeight);
  _.entryColumns = () => extension_vega_parser_module_value(spec.columns, extension_vega_parser_module_value(config.columns, +_.isVertical(true)));
  return _;
}
function extension_getEncoding(name, encode) {
  const v = encode && (encode.update && encode.update[name] || encode.enter && encode.enter[name]);
  return v && v.signal ? v : v ? v.value : null;
}
function extension_getStyle(name, scope, style) {
  const s = scope.config.style[style];
  return s && s[name];
}
function extension_anchorExpr(s, e, m) {
  return `item.anchor === '${extension_vega_parser_module_Start}' ? ${s} : item.anchor === '${extension_vega_parser_module_End}' ? ${e} : ${m}`;
}
const extension_alignExpr$1 = extension_anchorExpr(extension_$(extension_vega_parser_module_Left), extension_$(extension_vega_parser_module_Right), extension_$(extension_vega_parser_module_Center));
function extension_tickBand(_) {
  const v = _('tickBand');
  let offset = _('tickOffset'),
    band,
    extra;
  if (!v) {
    // if no tick band entry, fall back on other properties
    band = _('bandPosition');
    extra = _('tickExtra');
  } else if (v.signal) {
    // if signal, augment code to interpret values
    band = {
      signal: `(${v.signal}) === 'extent' ? 1 : 0.5`
    };
    extra = {
      signal: `(${v.signal}) === 'extent'`
    };
    if (!extension_vega_util_module_isObject(offset)) {
      offset = {
        signal: `(${v.signal}) === 'extent' ? 0 : ${offset}`
      };
    }
  } else if (v === 'extent') {
    // if constant, simply set values
    band = 1;
    extra = true;
    offset = 0;
  } else {
    band = 0.5;
    extra = false;
  }
  return {
    extra,
    band,
    offset
  };
}
function extension_extendOffset(value, offset) {
  return !offset ? value : !value ? offset : !extension_vega_util_module_isObject(value) ? {
    value,
    offset
  } : Object.assign({}, value, {
    offset: extension_extendOffset(value.offset, offset)
  });
}

function extension_guideMark (mark, extras) {
  if (extras) {
    mark.name = extras.name;
    mark.style = extras.style || mark.style;
    mark.interactive = !!extras.interactive;
    mark.encode = extension_extendEncode(mark.encode, extras, extension_vega_parser_module_Skip);
  } else {
    mark.interactive = false;
  }
  return mark;
}

function extension_legendGradient (spec, scale, config, userEncode) {
  const _ = extension_vega_parser_module_lookup(spec, config),
    vertical = _.isVertical(),
    thickness = _.gradientThickness(),
    length = _.gradientLength();
  let enter, start, stop, width, height;
  if (vertical) {
    start = [0, 1];
    stop = [0, 0];
    width = thickness;
    height = length;
  } else {
    start = [0, 0];
    stop = [1, 0];
    width = length;
    height = thickness;
  }
  const encode = {
    enter: enter = {
      opacity: extension_vega_parser_module_zero,
      x: extension_vega_parser_module_zero,
      y: extension_vega_parser_module_zero,
      width: extension_vega_parser_module_encoder(width),
      height: extension_vega_parser_module_encoder(height)
    },
    update: extension_extend({}, enter, {
      opacity: extension_vega_parser_module_one,
      fill: {
        gradient: scale,
        start: start,
        stop: stop
      }
    }),
    exit: {
      opacity: extension_vega_parser_module_zero
    }
  };
  extension_addEncoders(encode, {
    stroke: _('gradientStrokeColor'),
    strokeWidth: _('gradientStrokeWidth')
  }, {
    // update
    opacity: _('gradientOpacity')
  });
  return extension_guideMark({
    type: extension_RectMark,
    role: extension_LegendGradientRole,
    encode
  }, userEncode);
}

function extension_legendGradientDiscrete (spec, scale, config, userEncode, dataRef) {
  const _ = extension_vega_parser_module_lookup(spec, config),
    vertical = _.isVertical(),
    thickness = _.gradientThickness(),
    length = _.gradientLength();
  let u,
    v,
    uu,
    vv,
    adjust = '';
  vertical ? (u = 'y', uu = 'y2', v = 'x', vv = 'width', adjust = '1-') : (u = 'x', uu = 'x2', v = 'y', vv = 'height');
  const enter = {
    opacity: extension_vega_parser_module_zero,
    fill: {
      scale: scale,
      field: extension_vega_parser_module_Value
    }
  };
  enter[u] = {
    signal: adjust + 'datum.' + extension_Perc,
    mult: length
  };
  enter[v] = extension_vega_parser_module_zero;
  enter[uu] = {
    signal: adjust + 'datum.' + extension_Perc2,
    mult: length
  };
  enter[vv] = extension_vega_parser_module_encoder(thickness);
  const encode = {
    enter: enter,
    update: extension_extend({}, enter, {
      opacity: extension_vega_parser_module_one
    }),
    exit: {
      opacity: extension_vega_parser_module_zero
    }
  };
  extension_addEncoders(encode, {
    stroke: _('gradientStrokeColor'),
    strokeWidth: _('gradientStrokeWidth')
  }, {
    // update
    opacity: _('gradientOpacity')
  });
  return extension_guideMark({
    type: extension_RectMark,
    role: extension_LegendBandRole,
    key: extension_vega_parser_module_Value,
    from: dataRef,
    encode
  }, userEncode);
}

const extension_alignExpr = `datum.${extension_Perc}<=0?"${extension_vega_parser_module_Left}":datum.${extension_Perc}>=1?"${extension_vega_parser_module_Right}":"${extension_vega_parser_module_Center}"`,
  extension_baselineExpr = `datum.${extension_Perc}<=0?"${extension_vega_parser_module_Bottom}":datum.${extension_Perc}>=1?"${extension_vega_parser_module_Top}":"${extension_vega_parser_module_Middle}"`;
function extension_legendGradientLabels (spec, config, userEncode, dataRef) {
  const _ = extension_vega_parser_module_lookup(spec, config),
    vertical = _.isVertical(),
    thickness = extension_vega_parser_module_encoder(_.gradientThickness()),
    length = _.gradientLength();
  let overlap = _('labelOverlap'),
    enter,
    update,
    u,
    v,
    adjust = '';
  const encode = {
    enter: enter = {
      opacity: extension_vega_parser_module_zero
    },
    update: update = {
      opacity: extension_vega_parser_module_one,
      text: {
        field: extension_vega_parser_module_Label
      }
    },
    exit: {
      opacity: extension_vega_parser_module_zero
    }
  };
  extension_addEncoders(encode, {
    fill: _('labelColor'),
    fillOpacity: _('labelOpacity'),
    font: _('labelFont'),
    fontSize: _('labelFontSize'),
    fontStyle: _('labelFontStyle'),
    fontWeight: _('labelFontWeight'),
    limit: extension_vega_parser_module_value(spec.labelLimit, config.gradientLabelLimit)
  });
  if (vertical) {
    enter.align = {
      value: 'left'
    };
    enter.baseline = update.baseline = {
      signal: extension_baselineExpr
    };
    u = 'y';
    v = 'x';
    adjust = '1-';
  } else {
    enter.align = update.align = {
      signal: extension_alignExpr
    };
    enter.baseline = {
      value: 'top'
    };
    u = 'x';
    v = 'y';
  }
  enter[u] = update[u] = {
    signal: adjust + 'datum.' + extension_Perc,
    mult: length
  };
  enter[v] = update[v] = thickness;
  thickness.offset = extension_vega_parser_module_value(spec.labelOffset, config.gradientLabelOffset) || 0;
  overlap = overlap ? {
    separation: _('labelSeparation'),
    method: overlap,
    order: 'datum.' + extension_Index
  } : undefined;

  // type, role, style, key, dataRef, encode, extras
  return extension_guideMark({
    type: extension_TextMark,
    role: extension_LegendLabelRole,
    style: extension_GuideLabelStyle,
    key: extension_vega_parser_module_Value,
    from: dataRef,
    encode,
    overlap
  }, userEncode);
}

// userEncode is top-level, includes entries, symbols, labels
function extension_legendSymbolGroups (spec, config, userEncode, dataRef, columns) {
  const _ = extension_vega_parser_module_lookup(spec, config),
    entries = userEncode.entries,
    interactive = !!(entries && entries.interactive),
    name = entries ? entries.name : undefined,
    height = _('clipHeight'),
    symbolOffset = _('symbolOffset'),
    valueRef = {
      data: 'value'
    },
    xSignal = `(${columns}) ? datum.${extension_Offset} : datum.${extension_Size}`,
    yEncode = height ? extension_vega_parser_module_encoder(height) : {
      field: extension_Size
    },
    index = `datum.${extension_Index}`,
    ncols = `max(1, ${columns})`;
  let encode, enter, update, nrows, sort;
  yEncode.mult = 0.5;

  // -- LEGEND SYMBOLS --
  encode = {
    enter: enter = {
      opacity: extension_vega_parser_module_zero,
      x: {
        signal: xSignal,
        mult: 0.5,
        offset: symbolOffset
      },
      y: yEncode
    },
    update: update = {
      opacity: extension_vega_parser_module_one,
      x: enter.x,
      y: enter.y
    },
    exit: {
      opacity: extension_vega_parser_module_zero
    }
  };
  let baseFill = null,
    baseStroke = null;
  if (!spec.fill) {
    baseFill = config.symbolBaseFillColor;
    baseStroke = config.symbolBaseStrokeColor;
  }
  extension_addEncoders(encode, {
    fill: _('symbolFillColor', baseFill),
    shape: _('symbolType'),
    size: _('symbolSize'),
    stroke: _('symbolStrokeColor', baseStroke),
    strokeDash: _('symbolDash'),
    strokeDashOffset: _('symbolDashOffset'),
    strokeWidth: _('symbolStrokeWidth')
  }, {
    // update
    opacity: _('symbolOpacity')
  });
  extension_LegendScales.forEach(scale => {
    if (spec[scale]) {
      update[scale] = enter[scale] = {
        scale: spec[scale],
        field: extension_vega_parser_module_Value
      };
    }
  });
  const symbols = extension_guideMark({
    type: extension_SymbolMark,
    role: extension_LegendSymbolRole,
    key: extension_vega_parser_module_Value,
    from: valueRef,
    clip: height ? true : undefined,
    encode
  }, userEncode.symbols);

  // -- LEGEND LABELS --
  const labelOffset = extension_vega_parser_module_encoder(symbolOffset);
  labelOffset.offset = _('labelOffset');
  encode = {
    enter: enter = {
      opacity: extension_vega_parser_module_zero,
      x: {
        signal: xSignal,
        offset: labelOffset
      },
      y: yEncode
    },
    update: update = {
      opacity: extension_vega_parser_module_one,
      text: {
        field: extension_vega_parser_module_Label
      },
      x: enter.x,
      y: enter.y
    },
    exit: {
      opacity: extension_vega_parser_module_zero
    }
  };
  extension_addEncoders(encode, {
    align: _('labelAlign'),
    baseline: _('labelBaseline'),
    fill: _('labelColor'),
    fillOpacity: _('labelOpacity'),
    font: _('labelFont'),
    fontSize: _('labelFontSize'),
    fontStyle: _('labelFontStyle'),
    fontWeight: _('labelFontWeight'),
    limit: _('labelLimit')
  });
  const labels = extension_guideMark({
    type: extension_TextMark,
    role: extension_LegendLabelRole,
    style: extension_GuideLabelStyle,
    key: extension_vega_parser_module_Value,
    from: valueRef,
    encode
  }, userEncode.labels);

  // -- LEGEND ENTRY GROUPS --
  encode = {
    enter: {
      noBound: {
        value: !height
      },
      // ignore width/height in bounds calc
      width: extension_vega_parser_module_zero,
      height: height ? extension_vega_parser_module_encoder(height) : extension_vega_parser_module_zero,
      opacity: extension_vega_parser_module_zero
    },
    exit: {
      opacity: extension_vega_parser_module_zero
    },
    update: update = {
      opacity: extension_vega_parser_module_one,
      row: {
        signal: null
      },
      column: {
        signal: null
      }
    }
  };

  // annotate and sort groups to ensure correct ordering
  if (_.isVertical(true)) {
    nrows = `ceil(item.mark.items.length / ${ncols})`;
    update.row.signal = `${index}%${nrows}`;
    update.column.signal = `floor(${index} / ${nrows})`;
    sort = {
      field: ['row', index]
    };
  } else {
    update.row.signal = `floor(${index} / ${ncols})`;
    update.column.signal = `${index} % ${ncols}`;
    sort = {
      field: index
    };
  }
  // handle zero column case (implies infinite columns)
  update.column.signal = `(${columns})?${update.column.signal}:${index}`;

  // facet legend entries into sub-groups
  dataRef = {
    facet: {
      data: dataRef,
      name: 'value',
      groupby: extension_Index
    }
  };
  return extension_guideGroup({
    role: extension_vega_parser_module_ScopeRole,
    from: dataRef,
    encode: extension_extendEncode(encode, entries, extension_vega_parser_module_Skip),
    marks: [symbols, labels],
    name,
    interactive,
    sort
  });
}
function extension_legendSymbolLayout(spec, config) {
  const _ = extension_vega_parser_module_lookup(spec, config);

  // layout parameters for legend entries
  return {
    align: _('gridAlign'),
    columns: _.entryColumns(),
    center: {
      row: true,
      column: false
    },
    padding: {
      row: _('rowPadding'),
      column: _('columnPadding')
    }
  };
}

// expression logic for align, anchor, angle, and baseline calculation
const extension_isL = 'item.orient === "left"',
  extension_isR = 'item.orient === "right"',
  extension_isLR = `(${extension_isL} || ${extension_isR})`,
  extension_isVG = `datum.vgrad && ${extension_isLR}`,
  extension_baseline = extension_anchorExpr('"top"', '"bottom"', '"middle"'),
  extension_alignFlip = extension_anchorExpr('"right"', '"left"', '"center"'),
  extension_exprAlign = `datum.vgrad && ${extension_isR} ? (${extension_alignFlip}) : (${extension_isLR} && !(datum.vgrad && ${extension_isL})) ? "left" : ${extension_alignExpr$1}`,
  extension_exprAnchor = `item._anchor || (${extension_isLR} ? "middle" : "start")`,
  extension_exprAngle = `${extension_isVG} ? (${extension_isL} ? -90 : 90) : 0`,
  extension_exprBaseline = `${extension_isLR} ? (datum.vgrad ? (${extension_isR} ? "bottom" : "top") : ${extension_baseline}) : "top"`;
function extension_legendTitle (spec, config, userEncode, dataRef) {
  const _ = extension_vega_parser_module_lookup(spec, config);
  const encode = {
    enter: {
      opacity: extension_vega_parser_module_zero
    },
    update: {
      opacity: extension_vega_parser_module_one,
      x: {
        field: {
          group: 'padding'
        }
      },
      y: {
        field: {
          group: 'padding'
        }
      }
    },
    exit: {
      opacity: extension_vega_parser_module_zero
    }
  };
  extension_addEncoders(encode, {
    orient: _('titleOrient'),
    _anchor: _('titleAnchor'),
    anchor: {
      signal: extension_exprAnchor
    },
    angle: {
      signal: extension_exprAngle
    },
    align: {
      signal: extension_exprAlign
    },
    baseline: {
      signal: extension_exprBaseline
    },
    text: spec.title,
    fill: _('titleColor'),
    fillOpacity: _('titleOpacity'),
    font: _('titleFont'),
    fontSize: _('titleFontSize'),
    fontStyle: _('titleFontStyle'),
    fontWeight: _('titleFontWeight'),
    limit: _('titleLimit'),
    lineHeight: _('titleLineHeight')
  }, {
    // require update
    align: _('titleAlign'),
    baseline: _('titleBaseline')
  });
  return extension_guideMark({
    type: extension_TextMark,
    role: extension_LegendTitleRole,
    style: extension_GuideTitleStyle,
    from: dataRef,
    encode
  }, userEncode);
}

function extension_vega_parser_module_clip (clip, scope) {
  let expr;
  if (extension_vega_util_module_isObject(clip)) {
    if (clip.signal) {
      expr = clip.signal;
    } else if (clip.path) {
      expr = 'pathShape(' + extension_param(clip.path) + ')';
    } else if (clip.sphere) {
      expr = 'geoShape(' + extension_param(clip.sphere) + ', {type: "Sphere"})';
    }
  }
  return expr ? scope.signalRef(expr) : !!clip;
}
function extension_param(value) {
  return extension_vega_util_module_isObject(value) && value.signal ? value.signal : extension_$(value);
}

function extension_getRole (spec) {
  const role = spec.role || '';
  return role.startsWith('axis') || role.startsWith('legend') || role.startsWith('title') ? role : spec.type === extension_GroupMark ? extension_vega_parser_module_ScopeRole : role || extension_MarkRole;
}

function extension_vega_parser_module_definition (spec) {
  return {
    marktype: spec.type,
    name: spec.name || undefined,
    role: spec.role || extension_getRole(spec),
    zindex: +spec.zindex || undefined,
    aria: spec.aria,
    description: spec.description
  };
}

function extension_interactive (spec, scope) {
  return spec && spec.signal ? scope.signalRef(spec.signal) : spec === false ? false : true;
}

/**
 * Parse a data transform specification.
 */
function extension_parseTransform (spec, scope) {
  const def = extension_definition(spec.type);
  if (!def) extension_vega_util_module_error('Unrecognized transform type: ' + extension_$(spec.type));
  const t = extension_entry(def.type.toLowerCase(), null, extension_vega_parser_module_parseParameters(def, spec, scope));
  if (spec.signal) scope.addSignal(spec.signal, scope.proxy(t));
  t.metadata = def.metadata || {};
  return t;
}

/**
 * Parse all parameters of a data transform.
 */
function extension_vega_parser_module_parseParameters(def, spec, scope) {
  const params = {},
    n = def.params.length;
  for (let i = 0; i < n; ++i) {
    const pdef = def.params[i];
    params[pdef.name] = extension_vega_parser_module_parseParameter(pdef, spec, scope);
  }
  return params;
}

/**
 * Parse a data transform parameter.
 */
function extension_vega_parser_module_parseParameter(def, spec, scope) {
  const type = def.type,
    value = spec[def.name];
  if (type === 'index') {
    return extension_parseIndexParameter(def, spec, scope);
  } else if (value === undefined) {
    if (def.required) {
      extension_vega_util_module_error('Missing required ' + extension_$(spec.type) + ' parameter: ' + extension_$(def.name));
    }
    return;
  } else if (type === 'param') {
    return extension_parseSubParameters(def, spec, scope);
  } else if (type === 'projection') {
    return scope.projectionRef(spec[def.name]);
  }
  return def.array && !extension_isSignal(value) ? value.map(v => extension_parameterValue(def, v, scope)) : extension_parameterValue(def, value, scope);
}

/**
 * Parse a single parameter value.
 */
function extension_parameterValue(def, value, scope) {
  const type = def.type;
  if (extension_isSignal(value)) {
    return extension_isExpr(type) ? extension_vega_util_module_error('Expression references can not be signals.') : extension_isField(type) ? scope.fieldRef(value) : extension_isCompare(type) ? scope.compareRef(value) : scope.signalRef(value.signal);
  } else {
    const expr = def.expr || extension_isField(type);
    return expr && extension_outerExpr(value) ? scope.exprRef(value.expr, value.as) : expr && extension_outerField(value) ? extension_fieldRef$1(value.field, value.as) : extension_isExpr(type) ? extension_vega_functions_module_parser(value, scope) : extension_isData(type) ? extension_vega_parser_module_ref(scope.getData(value).values) : extension_isField(type) ? extension_fieldRef$1(value) : extension_isCompare(type) ? scope.compareRef(value) : value;
  }
}

/**
 * Parse parameter for accessing an index of another data set.
 */
function extension_parseIndexParameter(def, spec, scope) {
  if (!extension_vega_util_module_isString(spec.from)) {
    extension_vega_util_module_error('Lookup "from" parameter must be a string literal.');
  }
  return scope.getData(spec.from).lookupRef(scope, spec.key);
}

/**
 * Parse a parameter that contains one or more sub-parameter objects.
 */
function extension_parseSubParameters(def, spec, scope) {
  const value = spec[def.name];
  if (def.array) {
    if (!extension_vega_util_module_isArray(value)) {
      // signals not allowed!
      extension_vega_util_module_error('Expected an array of sub-parameters. Instead: ' + extension_$(value));
    }
    return value.map(v => extension_parseSubParameter(def, v, scope));
  } else {
    return extension_parseSubParameter(def, value, scope);
  }
}

/**
 * Parse a sub-parameter object.
 */
function extension_parseSubParameter(def, value, scope) {
  const n = def.params.length;
  let pdef;

  // loop over defs to find matching key
  for (let i = 0; i < n; ++i) {
    pdef = def.params[i];
    for (const k in pdef.key) {
      if (pdef.key[k] !== value[k]) {
        pdef = null;
        break;
      }
    }
    if (pdef) break;
  }
  // raise error if matching key not found
  if (!pdef) extension_vega_util_module_error('Unsupported parameter: ' + extension_$(value));

  // parse params, create Params transform, return ref
  const params = extension_extend(extension_vega_parser_module_parseParameters(pdef, value, scope), pdef.key);
  return extension_vega_parser_module_ref(scope.add(extension_vega_parser_module_Params(params)));
}

// -- Utilities -----

const extension_outerExpr = _ => _ && _.expr;
const extension_outerField = _ => _ && _.field;
const extension_isData = _ => _ === 'data';
const extension_isExpr = _ => _ === 'expr';
const extension_isField = _ => _ === 'field';
const extension_isCompare = _ => _ === 'compare';

function extension_parseData$1 (from, group, scope) {
  let facet, key, op, dataRef, parent;

  // if no source data, generate singleton datum
  if (!from) {
    dataRef = extension_vega_parser_module_ref(scope.add(extension_vega_parser_module_Collect(null, [{}])));
  }

  // if faceted, process facet specification
  else if (facet = from.facet) {
    if (!group) extension_vega_util_module_error('Only group marks can be faceted.');

    // use pre-faceted source data, if available
    if (facet.field != null) {
      dataRef = parent = extension_getDataRef(facet, scope);
    } else {
      // generate facet aggregates if no direct data specification
      if (!from.data) {
        op = extension_parseTransform(extension_extend({
          type: 'aggregate',
          groupby: extension_vega_util_module_array(facet.groupby)
        }, facet.aggregate), scope);
        op.params.key = scope.keyRef(facet.groupby);
        op.params.pulse = extension_getDataRef(facet, scope);
        dataRef = parent = extension_vega_parser_module_ref(scope.add(op));
      } else {
        parent = extension_vega_parser_module_ref(scope.getData(from.data).aggregate);
      }
      key = scope.keyRef(facet.groupby, true);
    }
  }

  // if not yet defined, get source data reference
  if (!dataRef) {
    dataRef = extension_getDataRef(from, scope);
  }
  return {
    key: key,
    pulse: dataRef,
    parent: parent
  };
}
function extension_getDataRef(from, scope) {
  return from.$ref ? from : from.data && from.data.$ref ? from.data : extension_vega_parser_module_ref(scope.getData(from.data).output);
}

function extension_DataScope(scope, input, output, values, aggr) {
  this.scope = scope; // parent scope object
  this.input = input; // first operator in pipeline (tuple input)
  this.output = output; // last operator in pipeline (tuple output)
  this.values = values; // operator for accessing tuples (but not tuple flow)

  // last aggregate in transform pipeline
  this.aggregate = aggr;

  // lookup table of field indices
  this.index = {};
}
extension_DataScope.fromEntries = function (scope, entries) {
  const n = entries.length,
    values = entries[n - 1],
    output = entries[n - 2];
  let input = entries[0],
    aggr = null,
    i = 1;
  if (input && input.type === 'load') {
    input = entries[1];
  }

  // add operator entries to this scope, wire up pulse chain
  scope.add(entries[0]);
  for (; i < n; ++i) {
    entries[i].params.pulse = extension_vega_parser_module_ref(entries[i - 1]);
    scope.add(entries[i]);
    if (entries[i].type === 'aggregate') aggr = entries[i];
  }
  return new extension_DataScope(scope, input, output, values, aggr);
};
function extension_fieldKey(field) {
  return extension_vega_util_module_isString(field) ? field : null;
}
function extension_addSortField(scope, p, sort) {
  const as = extension_aggrField(sort.op, sort.field);
  let s;
  if (p.ops) {
    for (let i = 0, n = p.as.length; i < n; ++i) {
      if (p.as[i] === as) return;
    }
  } else {
    p.ops = ['count'];
    p.fields = [null];
    p.as = ['count'];
  }
  if (sort.op) {
    p.ops.push((s = sort.op.signal) ? scope.signalRef(s) : sort.op);
    p.fields.push(scope.fieldRef(sort.field));
    p.as.push(as);
  }
}
function extension_cache(scope, ds, name, optype, field, counts, index) {
  const cache = ds[name] || (ds[name] = {}),
    sort = extension_sortKey(counts);
  let k = extension_fieldKey(field),
    v,
    op;
  if (k != null) {
    scope = ds.scope;
    k = k + (sort ? '|' + sort : '');
    v = cache[k];
  }
  if (!v) {
    const params = counts ? {
      field: extension_keyFieldRef,
      pulse: ds.countsRef(scope, field, counts)
    } : {
      field: scope.fieldRef(field),
      pulse: extension_vega_parser_module_ref(ds.output)
    };
    if (sort) params.sort = scope.sortRef(counts);
    op = scope.add(extension_entry(optype, undefined, params));
    if (index) ds.index[field] = op;
    v = extension_vega_parser_module_ref(op);
    if (k != null) cache[k] = v;
  }
  return v;
}
extension_DataScope.prototype = {
  countsRef(scope, field, sort) {
    const ds = this,
      cache = ds.counts || (ds.counts = {}),
      k = extension_fieldKey(field);
    let v, a, p;
    if (k != null) {
      scope = ds.scope;
      v = cache[k];
    }
    if (!v) {
      p = {
        groupby: scope.fieldRef(field, 'key'),
        pulse: extension_vega_parser_module_ref(ds.output)
      };
      if (sort && sort.field) extension_addSortField(scope, p, sort);
      a = scope.add(extension_vega_parser_module_Aggregate(p));
      v = scope.add(extension_vega_parser_module_Collect({
        pulse: extension_vega_parser_module_ref(a)
      }));
      v = {
        agg: a,
        ref: extension_vega_parser_module_ref(v)
      };
      if (k != null) cache[k] = v;
    } else if (sort && sort.field) {
      extension_addSortField(scope, v.agg.params, sort);
    }
    return v.ref;
  },
  tuplesRef() {
    return extension_vega_parser_module_ref(this.values);
  },
  extentRef(scope, field) {
    return extension_cache(scope, this, 'extent', 'extent', field, false);
  },
  domainRef(scope, field) {
    return extension_cache(scope, this, 'domain', 'values', field, false);
  },
  valuesRef(scope, field, sort) {
    return extension_cache(scope, this, 'vals', 'values', field, sort || true);
  },
  lookupRef(scope, field) {
    return extension_cache(scope, this, 'lookup', 'tupleindex', field, false);
  },
  indataRef(scope, field) {
    return extension_cache(scope, this, 'indata', 'tupleindex', field, true, true);
  }
};

function extension_parseFacet (spec, scope, group) {
  const facet = spec.from.facet,
    name = facet.name,
    data = extension_getDataRef(facet, scope);
  let op;
  if (!facet.name) {
    extension_vega_util_module_error('Facet must have a name: ' + extension_$(facet));
  }
  if (!facet.data) {
    extension_vega_util_module_error('Facet must reference a data set: ' + extension_$(facet));
  }
  if (facet.field) {
    op = scope.add(extension_vega_parser_module_PreFacet({
      field: scope.fieldRef(facet.field),
      pulse: data
    }));
  } else if (facet.groupby) {
    op = scope.add(extension_vega_parser_module_Facet({
      key: scope.keyRef(facet.groupby),
      group: extension_vega_parser_module_ref(scope.proxy(group.parent)),
      pulse: data
    }));
  } else {
    extension_vega_util_module_error('Facet must specify groupby or field: ' + extension_$(facet));
  }

  // initialize facet subscope
  const subscope = scope.fork(),
    source = subscope.add(extension_vega_parser_module_Collect()),
    values = subscope.add(extension_vega_parser_module_Sieve({
      pulse: extension_vega_parser_module_ref(source)
    }));
  subscope.addData(name, new extension_DataScope(subscope, source, source, values));
  subscope.addSignal('parent', null);

  // parse faceted subflow
  op.params.subflow = {
    $subflow: subscope.parse(spec).toRuntime()
  };
}

function extension_parseSubflow (spec, scope, input) {
  const op = scope.add(extension_vega_parser_module_PreFacet({
      pulse: input.pulse
    })),
    subscope = scope.fork();
  subscope.add(extension_vega_parser_module_Sieve());
  subscope.addSignal('parent', null);

  // parse group mark subflow
  op.params.subflow = {
    $subflow: subscope.parse(spec).toRuntime()
  };
}

function extension_parseTrigger (spec, scope, name) {
  const remove = spec.remove,
    insert = spec.insert,
    toggle = spec.toggle,
    modify = spec.modify,
    values = spec.values,
    op = scope.add(extension_operator());
  const update = 'if(' + spec.trigger + ',modify("' + name + '",' + [insert, remove, toggle, modify, values].map(_ => _ == null ? 'null' : _).join(',') + '),0)';
  const expr = extension_vega_functions_module_parser(update, scope);
  op.update = expr.$expr;
  op.params = expr.$params;
}

function extension_parseMark (spec, scope) {
  const role = extension_getRole(spec),
    group = spec.type === extension_GroupMark,
    facet = spec.from && spec.from.facet,
    overlap = spec.overlap;
  let layout = spec.layout || role === extension_vega_parser_module_ScopeRole || role === extension_vega_parser_module_FrameRole,
    ops,
    op,
    store,
    enc,
    name,
    layoutRef,
    boundRef;
  const nested = role === extension_MarkRole || layout || facet;

  // resolve input data
  const input = extension_parseData$1(spec.from, group, scope);

  // data join to map tuples to visual items
  op = scope.add(extension_vega_parser_module_DataJoin({
    key: input.key || (spec.key ? extension_fieldRef$1(spec.key) : undefined),
    pulse: input.pulse,
    clean: !group
  }));
  const joinRef = extension_vega_parser_module_ref(op);

  // collect visual items
  op = store = scope.add(extension_vega_parser_module_Collect({
    pulse: joinRef
  }));

  // connect visual items to scenegraph
  op = scope.add(extension_vega_parser_module_Mark({
    markdef: extension_vega_parser_module_definition(spec),
    interactive: extension_interactive(spec.interactive, scope),
    clip: extension_vega_parser_module_clip(spec.clip, scope),
    context: {
      $context: true
    },
    groups: scope.lookup(),
    parent: scope.signals.parent ? scope.signalRef('parent') : null,
    index: scope.markpath(),
    pulse: extension_vega_parser_module_ref(op)
  }));
  const markRef = extension_vega_parser_module_ref(op);

  // add visual encoders
  op = enc = scope.add(extension_vega_parser_module_Encode(extension_parseEncode(spec.encode, spec.type, role, spec.style, scope, {
    mod: false,
    pulse: markRef
  })));

  // monitor parent marks to propagate changes
  op.params.parent = scope.encode();

  // add post-encoding transforms, if defined
  if (spec.transform) {
    spec.transform.forEach(_ => {
      const tx = extension_parseTransform(_, scope),
        md = tx.metadata;
      if (md.generates || md.changes) {
        extension_vega_util_module_error('Mark transforms should not generate new data.');
      }
      if (!md.nomod) enc.params.mod = true; // update encode mod handling
      tx.params.pulse = extension_vega_parser_module_ref(op);
      scope.add(op = tx);
    });
  }

  // if item sort specified, perform post-encoding
  if (spec.sort) {
    op = scope.add(extension_vega_parser_module_SortItems({
      sort: scope.compareRef(spec.sort),
      pulse: extension_vega_parser_module_ref(op)
    }));
  }
  const encodeRef = extension_vega_parser_module_ref(op);

  // add view layout operator if needed
  if (facet || layout) {
    layout = scope.add(extension_vega_parser_module_ViewLayout({
      layout: scope.objectProperty(spec.layout),
      legends: scope.legends,
      mark: markRef,
      pulse: encodeRef
    }));
    layoutRef = extension_vega_parser_module_ref(layout);
  }

  // compute bounding boxes
  const bound = scope.add(extension_vega_parser_module_Bound({
    mark: markRef,
    pulse: layoutRef || encodeRef
  }));
  boundRef = extension_vega_parser_module_ref(bound);

  // if group mark, recurse to parse nested content
  if (group) {
    // juggle layout & bounds to ensure they run *after* any faceting transforms
    if (nested) {
      ops = scope.operators;
      ops.pop();
      if (layout) ops.pop();
    }
    scope.pushState(encodeRef, layoutRef || boundRef, joinRef);
    facet ? extension_parseFacet(spec, scope, input) // explicit facet
    : nested ? extension_parseSubflow(spec, scope, input) // standard mark group
    : scope.parse(spec); // guide group, we can avoid nested scopes
    scope.popState();
    if (nested) {
      if (layout) ops.push(layout);
      ops.push(bound);
    }
  }

  // if requested, add overlap removal transform
  if (overlap) {
    boundRef = extension_parseOverlap(overlap, boundRef, scope);
  }

  // render / sieve items
  const render = scope.add(extension_vega_parser_module_Render({
      pulse: boundRef
    })),
    sieve = scope.add(extension_vega_parser_module_Sieve({
      pulse: extension_vega_parser_module_ref(render)
    }, undefined, scope.parent()));

  // if mark is named, make accessible as reactive geometry
  // add trigger updates if defined
  if (spec.name != null) {
    name = spec.name;
    scope.addData(name, new extension_DataScope(scope, store, render, sieve));
    if (spec.on) spec.on.forEach(on => {
      if (on.insert || on.remove || on.toggle) {
        extension_vega_util_module_error('Marks only support modify triggers.');
      }
      extension_parseTrigger(on, scope, name);
    });
  }
}
function extension_parseOverlap(overlap, source, scope) {
  const method = overlap.method,
    bound = overlap.bound,
    sep = overlap.separation;
  const params = {
    separation: extension_isSignal(sep) ? scope.signalRef(sep.signal) : sep,
    method: extension_isSignal(method) ? scope.signalRef(method.signal) : method,
    pulse: source
  };
  if (overlap.order) {
    params.sort = scope.compareRef({
      field: overlap.order
    });
  }
  if (bound) {
    const tol = bound.tolerance;
    params.boundTolerance = extension_isSignal(tol) ? scope.signalRef(tol.signal) : +tol;
    params.boundScale = scope.scaleRef(bound.scale);
    params.boundOrient = bound.orient;
  }
  return extension_vega_parser_module_ref(scope.add(extension_vega_parser_module_Overlap(params)));
}

function extension_parseLegend (spec, scope) {
  const config = scope.config.legend,
    encode = spec.encode || {},
    _ = extension_vega_parser_module_lookup(spec, config),
    legendEncode = encode.legend || {},
    name = legendEncode.name || undefined,
    interactive = legendEncode.interactive,
    style = legendEncode.style,
    scales = {};
  let scale = 0,
    entryLayout,
    params,
    children;

  // resolve scales and 'canonical' scale name
  extension_LegendScales.forEach(s => spec[s] ? (scales[s] = spec[s], scale = scale || spec[s]) : 0);
  if (!scale) extension_vega_util_module_error('Missing valid scale for legend.');

  // resolve legend type (symbol, gradient, or discrete gradient)
  const type = extension_legendType(spec, scope.scaleType(scale));

  // single-element data source for legend group
  const datum = {
    title: spec.title != null,
    scales: scales,
    type: type,
    vgrad: type !== 'symbol' && _.isVertical()
  };
  const dataRef = extension_vega_parser_module_ref(scope.add(extension_vega_parser_module_Collect(null, [datum])));

  // encoding properties for legend entry sub-group
  const entryEncode = {
    enter: {
      x: {
        value: 0
      },
      y: {
        value: 0
      }
    }
  };

  // data source for legend values
  const entryRef = extension_vega_parser_module_ref(scope.add(extension_vega_parser_module_LegendEntries(params = {
    type: type,
    scale: scope.scaleRef(scale),
    count: scope.objectProperty(_('tickCount')),
    limit: scope.property(_('symbolLimit')),
    values: scope.objectProperty(spec.values),
    minstep: scope.property(spec.tickMinStep),
    formatType: scope.property(spec.formatType),
    formatSpecifier: scope.property(spec.format)
  })));

  // continuous gradient legend
  if (type === extension_vega_parser_module_Gradient) {
    children = [extension_legendGradient(spec, scale, config, encode.gradient), extension_legendGradientLabels(spec, config, encode.labels, entryRef)];
    // adjust default tick count based on the gradient length
    params.count = params.count || scope.signalRef(`max(2,2*floor((${extension_deref(_.gradientLength())})/100))`);
  }

  // discrete gradient legend
  else if (type === extension_vega_parser_module_Discrete) {
    children = [extension_legendGradientDiscrete(spec, scale, config, encode.gradient, entryRef), extension_legendGradientLabels(spec, config, encode.labels, entryRef)];
  }

  // symbol legend
  else {
    // determine legend symbol group layout
    entryLayout = extension_legendSymbolLayout(spec, config);
    children = [extension_legendSymbolGroups(spec, config, encode, entryRef, extension_deref(entryLayout.columns))];
    // pass symbol size information to legend entry generator
    params.size = extension_sizeExpression(spec, scope, children[0].marks);
  }

  // generate legend marks
  children = [extension_guideGroup({
    role: extension_LegendEntryRole,
    from: dataRef,
    encode: entryEncode,
    marks: children,
    layout: entryLayout,
    interactive
  })];

  // include legend title if defined
  if (datum.title) {
    children.push(extension_legendTitle(spec, config, encode.title, dataRef));
  }

  // parse legend specification
  return extension_parseMark(extension_guideGroup({
    role: extension_vega_parser_module_LegendRole,
    from: dataRef,
    encode: extension_extendEncode(extension_buildLegendEncode(_, spec, config), legendEncode, extension_vega_parser_module_Skip),
    marks: children,
    aria: _('aria'),
    description: _('description'),
    zindex: _('zindex'),
    name,
    interactive,
    style
  }), scope);
}
function extension_legendType(spec, scaleType) {
  let type = spec.type || extension_vega_parser_module_Symbols;
  if (!spec.type && extension_scaleCount(spec) === 1 && (spec.fill || spec.stroke)) {
    type = extension_isContinuous(scaleType) ? extension_vega_parser_module_Gradient : extension_isDiscretizing(scaleType) ? extension_vega_parser_module_Discrete : extension_vega_parser_module_Symbols;
  }
  return type !== extension_vega_parser_module_Gradient ? type : extension_isDiscretizing(scaleType) ? extension_vega_parser_module_Discrete : extension_vega_parser_module_Gradient;
}
function extension_scaleCount(spec) {
  return extension_LegendScales.reduce((count, type) => count + (spec[type] ? 1 : 0), 0);
}
function extension_buildLegendEncode(_, spec, config) {
  const encode = {
    enter: {},
    update: {}
  };
  extension_addEncoders(encode, {
    orient: _('orient'),
    offset: _('offset'),
    padding: _('padding'),
    titlePadding: _('titlePadding'),
    cornerRadius: _('cornerRadius'),
    fill: _('fillColor'),
    stroke: _('strokeColor'),
    strokeWidth: config.strokeWidth,
    strokeDash: config.strokeDash,
    x: _('legendX'),
    y: _('legendY'),
    // accessibility support
    format: spec.format,
    formatType: spec.formatType
  });
  return encode;
}
function extension_sizeExpression(spec, scope, marks) {
  const size = extension_deref(extension_getChannel('size', spec, marks)),
    strokeWidth = extension_deref(extension_getChannel('strokeWidth', spec, marks)),
    fontSize = extension_deref(extension_getFontSize(marks[1].encode, scope, extension_GuideLabelStyle));
  return extension_vega_functions_module_parser(`max(ceil(sqrt(${size})+${strokeWidth}),${fontSize})`, scope);
}
function extension_getChannel(name, spec, marks) {
  return spec[name] ? `scale("${spec[name]}",datum)` : extension_getEncoding(name, marks[0].encode);
}
function extension_getFontSize(encode, scope, style) {
  return extension_getEncoding('fontSize', encode) || extension_getStyle('fontSize', scope, style);
}

const extension_angleExpr = `item.orient==="${extension_vega_parser_module_Left}"?-90:item.orient==="${extension_vega_parser_module_Right}"?90:0`;
function extension_parseTitle (spec, scope) {
  spec = extension_vega_util_module_isString(spec) ? {
    text: spec
  } : spec;
  const _ = extension_vega_parser_module_lookup(spec, scope.config.title),
    encode = spec.encode || {},
    userEncode = encode.group || {},
    name = userEncode.name || undefined,
    interactive = userEncode.interactive,
    style = userEncode.style,
    children = [];

  // single-element data source for group title
  const datum = {},
    dataRef = extension_vega_parser_module_ref(scope.add(extension_vega_parser_module_Collect(null, [datum])));

  // include title text
  children.push(extension_buildTitle(spec, _, extension_titleEncode(spec), dataRef));

  // include subtitle text
  if (spec.subtitle) {
    children.push(extension_buildSubTitle(spec, _, encode.subtitle, dataRef));
  }

  // parse title specification
  return extension_parseMark(extension_guideGroup({
    role: extension_vega_parser_module_TitleRole,
    from: dataRef,
    encode: extension_groupEncode(_, userEncode),
    marks: children,
    aria: _('aria'),
    description: _('description'),
    zindex: _('zindex'),
    name,
    interactive,
    style
  }), scope);
}

// provide backwards-compatibility for title custom encode;
// the top-level encode block has been *deprecated*.
function extension_titleEncode(spec) {
  const encode = spec.encode;
  return encode && encode.title || extension_extend({
    name: spec.name,
    interactive: spec.interactive,
    style: spec.style
  }, encode);
}
function extension_groupEncode(_, userEncode) {
  const encode = {
    enter: {},
    update: {}
  };
  extension_addEncoders(encode, {
    orient: _('orient'),
    anchor: _('anchor'),
    align: {
      signal: extension_alignExpr$1
    },
    angle: {
      signal: extension_angleExpr
    },
    limit: _('limit'),
    frame: _('frame'),
    offset: _('offset') || 0,
    padding: _('subtitlePadding')
  });
  return extension_extendEncode(encode, userEncode, extension_vega_parser_module_Skip);
}
function extension_buildTitle(spec, _, userEncode, dataRef) {
  const zero = {
      value: 0
    },
    text = spec.text,
    encode = {
      enter: {
        opacity: zero
      },
      update: {
        opacity: {
          value: 1
        }
      },
      exit: {
        opacity: zero
      }
    };
  extension_addEncoders(encode, {
    text: text,
    align: {
      signal: 'item.mark.group.align'
    },
    angle: {
      signal: 'item.mark.group.angle'
    },
    limit: {
      signal: 'item.mark.group.limit'
    },
    baseline: 'top',
    dx: _('dx'),
    dy: _('dy'),
    fill: _('color'),
    font: _('font'),
    fontSize: _('fontSize'),
    fontStyle: _('fontStyle'),
    fontWeight: _('fontWeight'),
    lineHeight: _('lineHeight')
  }, {
    // update
    align: _('align'),
    angle: _('angle'),
    baseline: _('baseline')
  });
  return extension_guideMark({
    type: extension_TextMark,
    role: extension_TitleTextRole,
    style: extension_GroupTitleStyle,
    from: dataRef,
    encode
  }, userEncode);
}
function extension_buildSubTitle(spec, _, userEncode, dataRef) {
  const zero = {
      value: 0
    },
    text = spec.subtitle,
    encode = {
      enter: {
        opacity: zero
      },
      update: {
        opacity: {
          value: 1
        }
      },
      exit: {
        opacity: zero
      }
    };
  extension_addEncoders(encode, {
    text: text,
    align: {
      signal: 'item.mark.group.align'
    },
    angle: {
      signal: 'item.mark.group.angle'
    },
    limit: {
      signal: 'item.mark.group.limit'
    },
    baseline: 'top',
    dx: _('dx'),
    dy: _('dy'),
    fill: _('subtitleColor'),
    font: _('subtitleFont'),
    fontSize: _('subtitleFontSize'),
    fontStyle: _('subtitleFontStyle'),
    fontWeight: _('subtitleFontWeight'),
    lineHeight: _('subtitleLineHeight')
  }, {
    // update
    align: _('align'),
    angle: _('angle'),
    baseline: _('baseline')
  });
  return extension_guideMark({
    type: extension_TextMark,
    role: extension_TitleSubtitleRole,
    style: extension_GroupSubtitleStyle,
    from: dataRef,
    encode
  }, userEncode);
}

function extension_parseData(data, scope) {
  const transforms = [];
  if (data.transform) {
    data.transform.forEach(tx => {
      transforms.push(extension_parseTransform(tx, scope));
    });
  }
  if (data.on) {
    data.on.forEach(on => {
      extension_parseTrigger(on, scope, data.name);
    });
  }
  scope.addDataPipeline(data.name, extension_analyze(data, scope, transforms));
}

/**
 * Analyze a data pipeline, add needed operators.
 */
function extension_analyze(data, scope, ops) {
  const output = [];
  let source = null,
    modify = false,
    generate = false,
    upstream,
    i,
    n,
    t,
    m;
  if (data.values) {
    // hard-wired input data set
    if (extension_isSignal(data.values) || extension_hasSignal(data.format)) {
      // if either values is signal or format has signal, use dynamic loader
      output.push(extension_vega_parser_module_load(scope, data));
      output.push(source = extension_collect());
    } else {
      // otherwise, ingest upon dataflow init
      output.push(source = extension_collect({
        $ingest: data.values,
        $format: data.format
      }));
    }
  } else if (data.url) {
    // load data from external source
    if (extension_hasSignal(data.url) || extension_hasSignal(data.format)) {
      // if either url or format has signal, use dynamic loader
      output.push(extension_vega_parser_module_load(scope, data));
      output.push(source = extension_collect());
    } else {
      // otherwise, request load upon dataflow init
      output.push(source = extension_collect({
        $request: data.url,
        $format: data.format
      }));
    }
  } else if (data.source) {
    // derives from one or more other data sets
    source = upstream = extension_vega_util_module_array(data.source).map(d => extension_vega_parser_module_ref(scope.getData(d).output));
    output.push(null); // populate later
  }

  // scan data transforms, add collectors as needed
  for (i = 0, n = ops.length; i < n; ++i) {
    t = ops[i];
    m = t.metadata;
    if (!source && !m.source) {
      output.push(source = extension_collect());
    }
    output.push(t);
    if (m.generates) generate = true;
    if (m.modifies && !generate) modify = true;
    if (m.source) source = t;else if (m.changes) source = null;
  }
  if (upstream) {
    n = upstream.length - 1;
    output[0] = extension_vega_parser_module_Relay({
      derive: modify,
      pulse: n ? upstream : upstream[0]
    });
    if (modify || n) {
      // collect derived and multi-pulse tuples
      output.splice(1, 0, extension_collect());
    }
  }
  if (!source) output.push(extension_collect());
  output.push(extension_vega_parser_module_Sieve({}));
  return output;
}
function extension_collect(values) {
  const s = extension_vega_parser_module_Collect({}, values);
  s.metadata = {
    source: true
  };
  return s;
}
function extension_vega_parser_module_load(scope, data) {
  return extension_vega_parser_module_Load({
    url: data.url ? scope.property(data.url) : undefined,
    async: data.async ? scope.property(data.async) : undefined,
    values: data.values ? scope.property(data.values) : undefined,
    format: scope.objectProperty(data.format)
  });
}

const extension_isX = orient => orient === extension_vega_parser_module_Bottom || orient === extension_vega_parser_module_Top;

// get sign coefficient based on axis orient
const extension_getSign = (orient, a, b) => extension_isSignal(orient) ? extension_ifLeftTopExpr(orient.signal, a, b) : orient === extension_vega_parser_module_Left || orient === extension_vega_parser_module_Top ? a : b;

// condition on axis x-direction
const extension_ifX = (orient, a, b) => extension_isSignal(orient) ? extension_ifXEnc(orient.signal, a, b) : extension_isX(orient) ? a : b;

// condition on axis y-direction
const extension_ifY = (orient, a, b) => extension_isSignal(orient) ? extension_ifYEnc(orient.signal, a, b) : extension_isX(orient) ? b : a;
const extension_ifTop = (orient, a, b) => extension_isSignal(orient) ? extension_ifTopExpr(orient.signal, a, b) : orient === extension_vega_parser_module_Top ? {
  value: a
} : {
  value: b
};
const extension_ifRight = (orient, a, b) => extension_isSignal(orient) ? extension_ifRightExpr(orient.signal, a, b) : orient === extension_vega_parser_module_Right ? {
  value: a
} : {
  value: b
};
const extension_ifXEnc = ($orient, a, b) => extension_ifEnc(`${$orient} === '${extension_vega_parser_module_Top}' || ${$orient} === '${extension_vega_parser_module_Bottom}'`, a, b);
const extension_ifYEnc = ($orient, a, b) => extension_ifEnc(`${$orient} !== '${extension_vega_parser_module_Top}' && ${$orient} !== '${extension_vega_parser_module_Bottom}'`, a, b);
const extension_ifLeftTopExpr = ($orient, a, b) => extension_ifExpr(`${$orient} === '${extension_vega_parser_module_Left}' || ${$orient} === '${extension_vega_parser_module_Top}'`, a, b);
const extension_ifTopExpr = ($orient, a, b) => extension_ifExpr(`${$orient} === '${extension_vega_parser_module_Top}'`, a, b);
const extension_ifRightExpr = ($orient, a, b) => extension_ifExpr(`${$orient} === '${extension_vega_parser_module_Right}'`, a, b);
const extension_ifEnc = (test, a, b) => {
  // ensure inputs are encoder objects (or null)
  a = a != null ? extension_vega_parser_module_encoder(a) : a;
  b = b != null ? extension_vega_parser_module_encoder(b) : b;
  if (extension_isSimple(a) && extension_isSimple(b)) {
    // if possible generate simple signal expression
    a = a ? a.signal || extension_$(a.value) : null;
    b = b ? b.signal || extension_$(b.value) : null;
    return {
      signal: `${test} ? (${a}) : (${b})`
    };
  } else {
    // otherwise generate rule set
    return [extension_extend({
      test
    }, a)].concat(b || []);
  }
};
const extension_isSimple = enc => enc == null || Object.keys(enc).length === 1;
const extension_ifExpr = (test, a, b) => ({
  signal: `${test} ? (${extension_toExpr(a)}) : (${extension_toExpr(b)})`
});
const extension_ifOrient = ($orient, t, b, l, r) => ({
  signal: (l != null ? `${$orient} === '${extension_vega_parser_module_Left}' ? (${extension_toExpr(l)}) : ` : '') + (b != null ? `${$orient} === '${extension_vega_parser_module_Bottom}' ? (${extension_toExpr(b)}) : ` : '') + (r != null ? `${$orient} === '${extension_vega_parser_module_Right}' ? (${extension_toExpr(r)}) : ` : '') + (t != null ? `${$orient} === '${extension_vega_parser_module_Top}' ? (${extension_toExpr(t)}) : ` : '') + '(null)'
});
const extension_toExpr = v => extension_isSignal(v) ? v.signal : v == null ? null : extension_$(v);
const extension_mult = (sign, value) => value === 0 ? 0 : extension_isSignal(sign) ? {
  signal: `(${sign.signal}) * ${value}`
} : {
  value: sign * value
};
const extension_patch = (value, base) => {
  const s = value.signal;
  return s && s.endsWith('(null)') ? {
    signal: s.slice(0, -6) + base.signal
  } : value;
};

function extension_fallback(prop, config, axisConfig, style) {
  let styleProp;
  if (config && extension_vega_util_module_has(config, prop)) {
    return config[prop];
  } else if (extension_vega_util_module_has(axisConfig, prop)) {
    return axisConfig[prop];
  } else if (prop.startsWith('title')) {
    switch (prop) {
      case 'titleColor':
        styleProp = 'fill';
        break;
      case 'titleFont':
      case 'titleFontSize':
      case 'titleFontWeight':
        styleProp = prop[5].toLowerCase() + prop.slice(6);
    }
    return style[extension_GuideTitleStyle][styleProp];
  } else if (prop.startsWith('label')) {
    switch (prop) {
      case 'labelColor':
        styleProp = 'fill';
        break;
      case 'labelFont':
      case 'labelFontSize':
        styleProp = prop[5].toLowerCase() + prop.slice(6);
    }
    return style[extension_GuideLabelStyle][styleProp];
  }
  return null;
}
function extension_vega_parser_module_keys(objects) {
  const map = {};
  for (const obj of objects) {
    if (!obj) continue;
    for (const key in obj) map[key] = 1;
  }
  return Object.keys(map);
}
function extension_axisConfig (spec, scope) {
  var config = scope.config,
    style = config.style,
    axis = config.axis,
    band = scope.scaleType(spec.scale) === 'band' && config.axisBand,
    orient = spec.orient,
    xy,
    or,
    key;
  if (extension_isSignal(orient)) {
    const xyKeys = extension_vega_parser_module_keys([config.axisX, config.axisY]),
      orientKeys = extension_vega_parser_module_keys([config.axisTop, config.axisBottom, config.axisLeft, config.axisRight]);
    xy = {};
    for (key of xyKeys) {
      xy[key] = extension_ifX(orient, extension_fallback(key, config.axisX, axis, style), extension_fallback(key, config.axisY, axis, style));
    }
    or = {};
    for (key of orientKeys) {
      or[key] = extension_ifOrient(orient.signal, extension_fallback(key, config.axisTop, axis, style), extension_fallback(key, config.axisBottom, axis, style), extension_fallback(key, config.axisLeft, axis, style), extension_fallback(key, config.axisRight, axis, style));
    }
  } else {
    xy = orient === extension_vega_parser_module_Top || orient === extension_vega_parser_module_Bottom ? config.axisX : config.axisY;
    or = config['axis' + orient[0].toUpperCase() + orient.slice(1)];
  }
  const result = xy || or || band ? extension_extend({}, axis, xy, or, band) : axis;
  return result;
}

function extension_axisDomain (spec, config, userEncode, dataRef) {
  const _ = extension_vega_parser_module_lookup(spec, config),
    orient = spec.orient;
  let enter, update;
  const encode = {
    enter: enter = {
      opacity: extension_vega_parser_module_zero
    },
    update: update = {
      opacity: extension_vega_parser_module_one
    },
    exit: {
      opacity: extension_vega_parser_module_zero
    }
  };
  extension_addEncoders(encode, {
    stroke: _('domainColor'),
    strokeCap: _('domainCap'),
    strokeDash: _('domainDash'),
    strokeDashOffset: _('domainDashOffset'),
    strokeWidth: _('domainWidth'),
    strokeOpacity: _('domainOpacity')
  });
  const pos0 = extension_position(spec, 0);
  const pos1 = extension_position(spec, 1);
  enter.x = update.x = extension_ifX(orient, pos0, extension_vega_parser_module_zero);
  enter.x2 = update.x2 = extension_ifX(orient, pos1);
  enter.y = update.y = extension_ifY(orient, pos0, extension_vega_parser_module_zero);
  enter.y2 = update.y2 = extension_ifY(orient, pos1);
  return extension_guideMark({
    type: extension_RuleMark,
    role: extension_AxisDomainRole,
    from: dataRef,
    encode
  }, userEncode);
}
function extension_position(spec, pos) {
  return {
    scale: spec.scale,
    range: pos
  };
}

function extension_axisGrid (spec, config, userEncode, dataRef, band) {
  const _ = extension_vega_parser_module_lookup(spec, config),
    orient = spec.orient,
    vscale = spec.gridScale,
    sign = extension_getSign(orient, 1, -1),
    offset = extension_vega_parser_module_offsetValue(spec.offset, sign);
  let enter, exit, update;
  const encode = {
    enter: enter = {
      opacity: extension_vega_parser_module_zero
    },
    update: update = {
      opacity: extension_vega_parser_module_one
    },
    exit: exit = {
      opacity: extension_vega_parser_module_zero
    }
  };
  extension_addEncoders(encode, {
    stroke: _('gridColor'),
    strokeCap: _('gridCap'),
    strokeDash: _('gridDash'),
    strokeDashOffset: _('gridDashOffset'),
    strokeOpacity: _('gridOpacity'),
    strokeWidth: _('gridWidth')
  });
  const tickPos = {
    scale: spec.scale,
    field: extension_vega_parser_module_Value,
    band: band.band,
    extra: band.extra,
    offset: band.offset,
    round: _('tickRound')
  };
  const sz = extension_ifX(orient, {
    signal: 'height'
  }, {
    signal: 'width'
  });
  const gridStart = vscale ? {
    scale: vscale,
    range: 0,
    mult: sign,
    offset: offset
  } : {
    value: 0,
    offset: offset
  };
  const gridEnd = vscale ? {
    scale: vscale,
    range: 1,
    mult: sign,
    offset: offset
  } : extension_extend(sz, {
    mult: sign,
    offset: offset
  });
  enter.x = update.x = extension_ifX(orient, tickPos, gridStart);
  enter.y = update.y = extension_ifY(orient, tickPos, gridStart);
  enter.x2 = update.x2 = extension_ifY(orient, gridEnd);
  enter.y2 = update.y2 = extension_ifX(orient, gridEnd);
  exit.x = extension_ifX(orient, tickPos);
  exit.y = extension_ifY(orient, tickPos);
  return extension_guideMark({
    type: extension_RuleMark,
    role: extension_AxisGridRole,
    key: extension_vega_parser_module_Value,
    from: dataRef,
    encode
  }, userEncode);
}
function extension_vega_parser_module_offsetValue(offset, sign) {
  if (sign === 1) ; else if (!extension_vega_util_module_isObject(offset)) {
    offset = extension_isSignal(sign) ? {
      signal: `(${sign.signal}) * (${offset || 0})`
    } : sign * (offset || 0);
  } else {
    let entry = offset = extension_extend({}, offset);
    while (entry.mult != null) {
      if (!extension_vega_util_module_isObject(entry.mult)) {
        entry.mult = extension_isSignal(sign) // no offset if sign === 1
        ? {
          signal: `(${entry.mult}) * (${sign.signal})`
        } : entry.mult * sign;
        return offset;
      } else {
        entry = entry.mult = extension_extend({}, entry.mult);
      }
    }
    entry.mult = sign;
  }
  return offset;
}

function extension_axisTicks (spec, config, userEncode, dataRef, size, band) {
  const _ = extension_vega_parser_module_lookup(spec, config),
    orient = spec.orient,
    sign = extension_getSign(orient, -1, 1);
  let enter, exit, update;
  const encode = {
    enter: enter = {
      opacity: extension_vega_parser_module_zero
    },
    update: update = {
      opacity: extension_vega_parser_module_one
    },
    exit: exit = {
      opacity: extension_vega_parser_module_zero
    }
  };
  extension_addEncoders(encode, {
    stroke: _('tickColor'),
    strokeCap: _('tickCap'),
    strokeDash: _('tickDash'),
    strokeDashOffset: _('tickDashOffset'),
    strokeOpacity: _('tickOpacity'),
    strokeWidth: _('tickWidth')
  });
  const tickSize = extension_vega_parser_module_encoder(size);
  tickSize.mult = sign;
  const tickPos = {
    scale: spec.scale,
    field: extension_vega_parser_module_Value,
    band: band.band,
    extra: band.extra,
    offset: band.offset,
    round: _('tickRound')
  };
  update.y = enter.y = extension_ifX(orient, extension_vega_parser_module_zero, tickPos);
  update.y2 = enter.y2 = extension_ifX(orient, tickSize);
  exit.x = extension_ifX(orient, tickPos);
  update.x = enter.x = extension_ifY(orient, extension_vega_parser_module_zero, tickPos);
  update.x2 = enter.x2 = extension_ifY(orient, tickSize);
  exit.y = extension_ifY(orient, tickPos);
  return extension_guideMark({
    type: extension_RuleMark,
    role: extension_AxisTickRole,
    key: extension_vega_parser_module_Value,
    from: dataRef,
    encode
  }, userEncode);
}

function extension_flushExpr(scale, threshold, a, b, c) {
  return {
    signal: 'flush(range("' + scale + '"), ' + 'scale("' + scale + '", datum.value), ' + threshold + ',' + a + ',' + b + ',' + c + ')'
  };
}
function extension_axisLabels (spec, config, userEncode, dataRef, size, band) {
  const _ = extension_vega_parser_module_lookup(spec, config),
    orient = spec.orient,
    scale = spec.scale,
    sign = extension_getSign(orient, -1, 1),
    flush = extension_deref(_('labelFlush')),
    flushOffset = extension_deref(_('labelFlushOffset')),
    labelAlign = _('labelAlign'),
    labelBaseline = _('labelBaseline');
  let flushOn = flush === 0 || !!flush,
    update;
  const tickSize = extension_vega_parser_module_encoder(size);
  tickSize.mult = sign;
  tickSize.offset = extension_vega_parser_module_encoder(_('labelPadding') || 0);
  tickSize.offset.mult = sign;
  const tickPos = {
    scale: scale,
    field: extension_vega_parser_module_Value,
    band: 0.5,
    offset: extension_extendOffset(band.offset, _('labelOffset'))
  };
  const align = extension_ifX(orient, flushOn ? extension_flushExpr(scale, flush, '"left"', '"right"', '"center"') : {
    value: 'center'
  }, extension_ifRight(orient, 'left', 'right'));
  const baseline = extension_ifX(orient, extension_ifTop(orient, 'bottom', 'top'), flushOn ? extension_flushExpr(scale, flush, '"top"', '"bottom"', '"middle"') : {
    value: 'middle'
  });
  const offsetExpr = extension_flushExpr(scale, flush, `-(${flushOffset})`, flushOffset, 0);
  flushOn = flushOn && flushOffset;
  const enter = {
    opacity: extension_vega_parser_module_zero,
    x: extension_ifX(orient, tickPos, tickSize),
    y: extension_ifY(orient, tickPos, tickSize)
  };
  const encode = {
    enter: enter,
    update: update = {
      opacity: extension_vega_parser_module_one,
      text: {
        field: extension_vega_parser_module_Label
      },
      x: enter.x,
      y: enter.y,
      align,
      baseline
    },
    exit: {
      opacity: extension_vega_parser_module_zero,
      x: enter.x,
      y: enter.y
    }
  };
  extension_addEncoders(encode, {
    dx: !labelAlign && flushOn ? extension_ifX(orient, offsetExpr) : null,
    dy: !labelBaseline && flushOn ? extension_ifY(orient, offsetExpr) : null
  });
  extension_addEncoders(encode, {
    angle: _('labelAngle'),
    fill: _('labelColor'),
    fillOpacity: _('labelOpacity'),
    font: _('labelFont'),
    fontSize: _('labelFontSize'),
    fontWeight: _('labelFontWeight'),
    fontStyle: _('labelFontStyle'),
    limit: _('labelLimit'),
    lineHeight: _('labelLineHeight')
  }, {
    align: labelAlign,
    baseline: labelBaseline
  });
  const bound = _('labelBound');
  let overlap = _('labelOverlap');

  // if overlap method or bound defined, request label overlap removal
  overlap = overlap || bound ? {
    separation: _('labelSeparation'),
    method: overlap,
    order: 'datum.index',
    bound: bound ? {
      scale,
      orient,
      tolerance: bound
    } : null
  } : undefined;
  if (update.align !== align) {
    update.align = extension_patch(update.align, align);
  }
  if (update.baseline !== baseline) {
    update.baseline = extension_patch(update.baseline, baseline);
  }
  return extension_guideMark({
    type: extension_TextMark,
    role: extension_AxisLabelRole,
    style: extension_GuideLabelStyle,
    key: extension_vega_parser_module_Value,
    from: dataRef,
    encode,
    overlap
  }, userEncode);
}

function extension_axisTitle (spec, config, userEncode, dataRef) {
  const _ = extension_vega_parser_module_lookup(spec, config),
    orient = spec.orient,
    sign = extension_getSign(orient, -1, 1);
  let enter, update;
  const encode = {
    enter: enter = {
      opacity: extension_vega_parser_module_zero,
      anchor: extension_vega_parser_module_encoder(_('titleAnchor', null)),
      align: {
        signal: extension_alignExpr$1
      }
    },
    update: update = extension_extend({}, enter, {
      opacity: extension_vega_parser_module_one,
      text: extension_vega_parser_module_encoder(spec.title)
    }),
    exit: {
      opacity: extension_vega_parser_module_zero
    }
  };
  const titlePos = {
    signal: `lerp(range("${spec.scale}"), ${extension_anchorExpr(0, 1, 0.5)})`
  };
  update.x = extension_ifX(orient, titlePos);
  update.y = extension_ifY(orient, titlePos);
  enter.angle = extension_ifX(orient, extension_vega_parser_module_zero, extension_mult(sign, 90));
  enter.baseline = extension_ifX(orient, extension_ifTop(orient, extension_vega_parser_module_Bottom, extension_vega_parser_module_Top), {
    value: extension_vega_parser_module_Bottom
  });
  update.angle = enter.angle;
  update.baseline = enter.baseline;
  extension_addEncoders(encode, {
    fill: _('titleColor'),
    fillOpacity: _('titleOpacity'),
    font: _('titleFont'),
    fontSize: _('titleFontSize'),
    fontStyle: _('titleFontStyle'),
    fontWeight: _('titleFontWeight'),
    limit: _('titleLimit'),
    lineHeight: _('titleLineHeight')
  }, {
    // require update
    align: _('titleAlign'),
    angle: _('titleAngle'),
    baseline: _('titleBaseline')
  });
  extension_autoLayout(_, orient, encode, userEncode);
  encode.update.align = extension_patch(encode.update.align, enter.align);
  encode.update.angle = extension_patch(encode.update.angle, enter.angle);
  encode.update.baseline = extension_patch(encode.update.baseline, enter.baseline);
  return extension_guideMark({
    type: extension_TextMark,
    role: extension_AxisTitleRole,
    style: extension_GuideTitleStyle,
    from: dataRef,
    encode
  }, userEncode);
}
function extension_autoLayout(_, orient, encode, userEncode) {
  const auto = (value, dim) => value != null ? (encode.update[dim] = extension_patch(extension_vega_parser_module_encoder(value), encode.update[dim]), false) : !extension_vega_parser_module_has(dim, userEncode) ? true : false;
  const autoY = auto(_('titleX'), 'x'),
    autoX = auto(_('titleY'), 'y');
  encode.enter.auto = autoX === autoY ? extension_vega_parser_module_encoder(autoX) : extension_ifX(orient, extension_vega_parser_module_encoder(autoX), extension_vega_parser_module_encoder(autoY));
}

function extension_parseAxis (spec, scope) {
  const config = extension_axisConfig(spec, scope),
    encode = spec.encode || {},
    axisEncode = encode.axis || {},
    name = axisEncode.name || undefined,
    interactive = axisEncode.interactive,
    style = axisEncode.style,
    _ = extension_vega_parser_module_lookup(spec, config),
    band = extension_tickBand(_);

  // single-element data source for axis group
  const datum = {
    scale: spec.scale,
    ticks: !!_('ticks'),
    labels: !!_('labels'),
    grid: !!_('grid'),
    domain: !!_('domain'),
    title: spec.title != null
  };
  const dataRef = extension_vega_parser_module_ref(scope.add(extension_vega_parser_module_Collect({}, [datum])));

  // data source for axis ticks
  const ticksRef = extension_vega_parser_module_ref(scope.add(extension_vega_parser_module_AxisTicks({
    scale: scope.scaleRef(spec.scale),
    extra: scope.property(band.extra),
    count: scope.objectProperty(spec.tickCount),
    values: scope.objectProperty(spec.values),
    minstep: scope.property(spec.tickMinStep),
    formatType: scope.property(spec.formatType),
    formatSpecifier: scope.property(spec.format)
  })));

  // generate axis marks
  const children = [];
  let size;

  // include axis gridlines if requested
  if (datum.grid) {
    children.push(extension_axisGrid(spec, config, encode.grid, ticksRef, band));
  }

  // include axis ticks if requested
  if (datum.ticks) {
    size = _('tickSize');
    children.push(extension_axisTicks(spec, config, encode.ticks, ticksRef, size, band));
  }

  // include axis labels if requested
  if (datum.labels) {
    size = datum.ticks ? size : 0;
    children.push(extension_axisLabels(spec, config, encode.labels, ticksRef, size, band));
  }

  // include axis domain path if requested
  if (datum.domain) {
    children.push(extension_axisDomain(spec, config, encode.domain, dataRef));
  }

  // include axis title if defined
  if (datum.title) {
    children.push(extension_axisTitle(spec, config, encode.title, dataRef));
  }

  // parse axis specification
  return extension_parseMark(extension_guideGroup({
    role: extension_vega_parser_module_AxisRole,
    from: dataRef,
    encode: extension_extendEncode(extension_buildAxisEncode(_, spec), axisEncode, extension_vega_parser_module_Skip),
    marks: children,
    aria: _('aria'),
    description: _('description'),
    zindex: _('zindex'),
    name,
    interactive,
    style
  }), scope);
}
function extension_buildAxisEncode(_, spec) {
  const encode = {
    enter: {},
    update: {}
  };
  extension_addEncoders(encode, {
    orient: _('orient'),
    offset: _('offset') || 0,
    position: extension_vega_parser_module_value(spec.position, 0),
    titlePadding: _('titlePadding'),
    minExtent: _('minExtent'),
    maxExtent: _('maxExtent'),
    range: {
      signal: `abs(span(range("${spec.scale}")))`
    },
    translate: _('translate'),
    // accessibility support
    format: spec.format,
    formatType: spec.formatType
  });
  return encode;
}

function extension_parseScope (spec, scope, preprocessed) {
  const signals = extension_vega_util_module_array(spec.signals),
    scales = extension_vega_util_module_array(spec.scales);

  // parse signal definitions, if not already preprocessed
  if (!preprocessed) signals.forEach(_ => extension_parseSignal(_, scope));

  // parse cartographic projection definitions
  extension_vega_util_module_array(spec.projections).forEach(_ => extension_parseProjection(_, scope));

  // initialize scale references
  scales.forEach(_ => extension_initScale(_, scope));

  // parse data sources
  extension_vega_util_module_array(spec.data).forEach(_ => extension_parseData(_, scope));

  // parse scale definitions
  scales.forEach(_ => extension_parseScale(_, scope));

  // parse signal updates
  (preprocessed || signals).forEach(_ => extension_parseSignalUpdates(_, scope));

  // parse axis definitions
  extension_vega_util_module_array(spec.axes).forEach(_ => extension_parseAxis(_, scope));

  // parse mark definitions
  extension_vega_util_module_array(spec.marks).forEach(_ => extension_parseMark(_, scope));

  // parse legend definitions
  extension_vega_util_module_array(spec.legends).forEach(_ => extension_parseLegend(_, scope));

  // parse title, if defined
  if (spec.title) extension_parseTitle(spec.title, scope);

  // parse collected lambda (anonymous) expressions
  scope.parseLambdas();
  return scope;
}

const extension_rootEncode = spec => extension_extendEncode({
  enter: {
    x: {
      value: 0
    },
    y: {
      value: 0
    }
  },
  update: {
    width: {
      signal: 'width'
    },
    height: {
      signal: 'height'
    }
  }
}, spec);
function extension_parseView(spec, scope) {
  const config = scope.config;

  // add scenegraph root
  const root = extension_vega_parser_module_ref(scope.root = scope.add(extension_operator()));

  // parse top-level signal definitions
  const signals = extension_collectSignals(spec, config);
  signals.forEach(_ => extension_parseSignal(_, scope));

  // assign description, event, legend, and locale configuration
  scope.description = spec.description || config.description;
  scope.eventConfig = config.events;
  scope.legends = scope.objectProperty(config.legend && config.legend.layout);
  scope.locale = config.locale;

  // store root group item
  const input = scope.add(extension_vega_parser_module_Collect());

  // encode root group item
  const encode = scope.add(extension_vega_parser_module_Encode(extension_parseEncode(extension_rootEncode(spec.encode), extension_GroupMark, extension_vega_parser_module_FrameRole, spec.style, scope, {
    pulse: extension_vega_parser_module_ref(input)
  })));

  // perform view layout
  const parent = scope.add(extension_vega_parser_module_ViewLayout({
    layout: scope.objectProperty(spec.layout),
    legends: scope.legends,
    autosize: scope.signalRef('autosize'),
    mark: root,
    pulse: extension_vega_parser_module_ref(encode)
  }));
  scope.operators.pop();

  // parse remainder of specification
  scope.pushState(extension_vega_parser_module_ref(encode), extension_vega_parser_module_ref(parent), null);
  extension_parseScope(spec, scope, signals);
  scope.operators.push(parent);

  // bound / render / sieve root item
  let op = scope.add(extension_vega_parser_module_Bound({
    mark: root,
    pulse: extension_vega_parser_module_ref(parent)
  }));
  op = scope.add(extension_vega_parser_module_Render({
    pulse: extension_vega_parser_module_ref(op)
  }));
  op = scope.add(extension_vega_parser_module_Sieve({
    pulse: extension_vega_parser_module_ref(op)
  }));

  // track metadata for root item
  scope.addData('root', new extension_DataScope(scope, input, input, op));
  return scope;
}
function extension_signalObject(name, value) {
  return value && value.signal ? {
    name,
    update: value.signal
  } : {
    name,
    value
  };
}

/**
 * Collect top-level signals, merging values as needed. Signals
 * defined in the config signals arrays are added only if that
 * signal is not explicitly defined in the specification.
 * Built-in signals (autosize, background, padding, width, height)
 * receive special treatment. They are initialized using the
 * top-level spec property, or, if undefined in the spec, using
 * the corresponding top-level config property. If this property
 * is a signal reference object, the signal expression maps to the
 * signal 'update' property. If the spec's top-level signal array
 * contains an entry that matches a built-in signal, that entry
 * will be merged with the built-in specification, potentially
 * overwriting existing 'value' or 'update' properties.
 */
function extension_collectSignals(spec, config) {
  const _ = name => extension_vega_parser_module_value(spec[name], config[name]),
    signals = [extension_signalObject('background', _('background')), extension_signalObject('autosize', extension_parseAutosize(_('autosize'))), extension_signalObject('padding', extension_parsePadding(_('padding'))), extension_signalObject('width', _('width') || 0), extension_signalObject('height', _('height') || 0)],
    pre = signals.reduce((p, s) => (p[s.name] = s, p), {}),
    map = {};

  // add spec signal array
  extension_vega_util_module_array(spec.signals).forEach(s => {
    if (extension_vega_util_module_has(pre, s.name)) {
      // merge if built-in signal
      s = extension_extend(pre[s.name], s);
    } else {
      // otherwise add to signal list
      signals.push(s);
    }
    map[s.name] = s;
  });

  // add config signal array
  extension_vega_util_module_array(config.signals).forEach(s => {
    if (!extension_vega_util_module_has(map, s.name) && !extension_vega_util_module_has(pre, s.name)) {
      // add to signal list if not already defined
      signals.push(s);
    }
  });
  return signals;
}

function extension_vega_parser_module_Scope(config, options) {
  this.config = config || {};
  this.options = options || {};
  this.bindings = [];
  this.field = {};
  this.signals = {};
  this.lambdas = {};
  this.scales = {};
  this.events = {};
  this.data = {};
  this.streams = [];
  this.updates = [];
  this.operators = [];
  this.eventConfig = null;
  this.locale = null;
  this._id = 0;
  this._subid = 0;
  this._nextsub = [0];
  this._parent = [];
  this._encode = [];
  this._lookup = [];
  this._markpath = [];
}
function extension_Subscope(scope) {
  this.config = scope.config;
  this.options = scope.options;
  this.legends = scope.legends;
  this.field = Object.create(scope.field);
  this.signals = Object.create(scope.signals);
  this.lambdas = Object.create(scope.lambdas);
  this.scales = Object.create(scope.scales);
  this.events = Object.create(scope.events);
  this.data = Object.create(scope.data);
  this.streams = [];
  this.updates = [];
  this.operators = [];
  this._id = 0;
  this._subid = ++scope._nextsub[0];
  this._nextsub = scope._nextsub;
  this._parent = scope._parent.slice();
  this._encode = scope._encode.slice();
  this._lookup = scope._lookup.slice();
  this._markpath = scope._markpath;
}
extension_vega_parser_module_Scope.prototype = extension_Subscope.prototype = {
  parse(spec) {
    return extension_parseScope(spec, this);
  },
  fork() {
    return new extension_Subscope(this);
  },
  isSubscope() {
    return this._subid > 0;
  },
  toRuntime() {
    this.finish();
    return {
      description: this.description,
      operators: this.operators,
      streams: this.streams,
      updates: this.updates,
      bindings: this.bindings,
      eventConfig: this.eventConfig,
      locale: this.locale
    };
  },
  id() {
    return (this._subid ? this._subid + ':' : 0) + this._id++;
  },
  add(op) {
    this.operators.push(op);
    op.id = this.id();
    // if pre-registration references exist, resolve them now
    if (op.refs) {
      op.refs.forEach(ref => {
        ref.$ref = op.id;
      });
      op.refs = null;
    }
    return op;
  },
  proxy(op) {
    const vref = op instanceof extension_Entry ? extension_vega_parser_module_ref(op) : op;
    return this.add(extension_vega_parser_module_Proxy({
      value: vref
    }));
  },
  addStream(stream) {
    this.streams.push(stream);
    stream.id = this.id();
    return stream;
  },
  addUpdate(update) {
    this.updates.push(update);
    return update;
  },
  // Apply metadata
  finish() {
    let name, ds;

    // annotate root
    if (this.root) this.root.root = true;

    // annotate signals
    for (name in this.signals) {
      this.signals[name].signal = name;
    }

    // annotate scales
    for (name in this.scales) {
      this.scales[name].scale = name;
    }

    // annotate data sets
    function annotate(op, name, type) {
      let data, list;
      if (op) {
        data = op.data || (op.data = {});
        list = data[name] || (data[name] = []);
        list.push(type);
      }
    }
    for (name in this.data) {
      ds = this.data[name];
      annotate(ds.input, name, 'input');
      annotate(ds.output, name, 'output');
      annotate(ds.values, name, 'values');
      for (const field in ds.index) {
        annotate(ds.index[field], name, 'index:' + field);
      }
    }
    return this;
  },
  // ----

  pushState(encode, parent, lookup) {
    this._encode.push(extension_vega_parser_module_ref(this.add(extension_vega_parser_module_Sieve({
      pulse: encode
    }))));
    this._parent.push(parent);
    this._lookup.push(lookup ? extension_vega_parser_module_ref(this.proxy(lookup)) : null);
    this._markpath.push(-1);
  },
  popState() {
    this._encode.pop();
    this._parent.pop();
    this._lookup.pop();
    this._markpath.pop();
  },
  parent() {
    return extension_peek(this._parent);
  },
  encode() {
    return extension_peek(this._encode);
  },
  lookup() {
    return extension_peek(this._lookup);
  },
  markpath() {
    const p = this._markpath;
    return ++p[p.length - 1];
  },
  // ----

  fieldRef(field, name) {
    if (extension_vega_util_module_isString(field)) return extension_fieldRef$1(field, name);
    if (!field.signal) {
      extension_vega_util_module_error('Unsupported field reference: ' + extension_$(field));
    }
    const s = field.signal;
    let f = this.field[s];
    if (!f) {
      const params = {
        name: this.signalRef(s)
      };
      if (name) params.as = name;
      this.field[s] = f = extension_vega_parser_module_ref(this.add(extension_vega_parser_module_Field(params)));
    }
    return f;
  },
  compareRef(cmp) {
    let signal = false;
    const check = _ => extension_isSignal(_) ? (signal = true, this.signalRef(_.signal)) : extension_isExpr$1(_) ? (signal = true, this.exprRef(_.expr)) : _;
    const fields = extension_vega_util_module_array(cmp.field).map(check),
      orders = extension_vega_util_module_array(cmp.order).map(check);
    return signal ? extension_vega_parser_module_ref(this.add(extension_vega_parser_module_Compare({
      fields: fields,
      orders: orders
    }))) : extension_compareRef(fields, orders);
  },
  keyRef(fields, flat) {
    let signal = false;
    const check = _ => extension_isSignal(_) ? (signal = true, extension_vega_parser_module_ref(sig[_.signal])) : _;
    const sig = this.signals;
    fields = extension_vega_util_module_array(fields).map(check);
    return signal ? extension_vega_parser_module_ref(this.add(extension_vega_parser_module_Key({
      fields: fields,
      flat: flat
    }))) : extension_keyRef(fields, flat);
  },
  sortRef(sort) {
    if (!sort) return sort;

    // including id ensures stable sorting
    const a = extension_aggrField(sort.op, sort.field),
      o = sort.order || extension_Ascending;
    return o.signal ? extension_vega_parser_module_ref(this.add(extension_vega_parser_module_Compare({
      fields: a,
      orders: this.signalRef(o.signal)
    }))) : extension_compareRef(a, o);
  },
  // ----

  event(source, type) {
    const key = source + ':' + type;
    if (!this.events[key]) {
      const id = this.id();
      this.streams.push({
        id: id,
        source: source,
        type: type
      });
      this.events[key] = id;
    }
    return this.events[key];
  },
  // ----

  hasOwnSignal(name) {
    return extension_vega_util_module_has(this.signals, name);
  },
  addSignal(name, value) {
    if (this.hasOwnSignal(name)) {
      extension_vega_util_module_error('Duplicate signal name: ' + extension_$(name));
    }
    const op = value instanceof extension_Entry ? value : this.add(extension_operator(value));
    return this.signals[name] = op;
  },
  getSignal(name) {
    if (!this.signals[name]) {
      extension_vega_util_module_error('Unrecognized signal name: ' + extension_$(name));
    }
    return this.signals[name];
  },
  signalRef(s) {
    if (this.signals[s]) {
      return extension_vega_parser_module_ref(this.signals[s]);
    } else if (!extension_vega_util_module_has(this.lambdas, s)) {
      this.lambdas[s] = this.add(extension_operator(null));
    }
    return extension_vega_parser_module_ref(this.lambdas[s]);
  },
  parseLambdas() {
    const code = Object.keys(this.lambdas);
    for (let i = 0, n = code.length; i < n; ++i) {
      const s = code[i],
        e = extension_vega_functions_module_parser(s, this),
        op = this.lambdas[s];
      op.params = e.$params;
      op.update = e.$expr;
    }
  },
  property(spec) {
    return spec && spec.signal ? this.signalRef(spec.signal) : spec;
  },
  objectProperty(spec) {
    return !spec || !extension_vega_util_module_isObject(spec) ? spec : this.signalRef(spec.signal || extension_propertyLambda(spec));
  },
  exprRef(code, name) {
    const params = {
      expr: extension_vega_functions_module_parser(code, this)
    };
    if (name) params.expr.$name = name;
    return extension_vega_parser_module_ref(this.add(extension_vega_parser_module_Expression(params)));
  },
  addBinding(name, bind) {
    if (!this.bindings) {
      extension_vega_util_module_error('Nested signals do not support binding: ' + extension_$(name));
    }
    this.bindings.push(extension_extend({
      signal: name
    }, bind));
  },
  // ----

  addScaleProj(name, transform) {
    if (extension_vega_util_module_has(this.scales, name)) {
      extension_vega_util_module_error('Duplicate scale or projection name: ' + extension_$(name));
    }
    this.scales[name] = this.add(transform);
  },
  addScale(name, params) {
    this.addScaleProj(name, extension_vega_parser_module_Scale(params));
  },
  addProjection(name, params) {
    this.addScaleProj(name, extension_vega_parser_module_Projection(params));
  },
  getScale(name) {
    if (!this.scales[name]) {
      extension_vega_util_module_error('Unrecognized scale name: ' + extension_$(name));
    }
    return this.scales[name];
  },
  scaleRef(name) {
    return extension_vega_parser_module_ref(this.getScale(name));
  },
  scaleType(name) {
    return this.getScale(name).params.type;
  },
  projectionRef(name) {
    return this.scaleRef(name);
  },
  projectionType(name) {
    return this.scaleType(name);
  },
  // ----

  addData(name, dataScope) {
    if (extension_vega_util_module_has(this.data, name)) {
      extension_vega_util_module_error('Duplicate data set name: ' + extension_$(name));
    }
    return this.data[name] = dataScope;
  },
  getData(name) {
    if (!this.data[name]) {
      extension_vega_util_module_error('Undefined data set name: ' + extension_$(name));
    }
    return this.data[name];
  },
  addDataPipeline(name, entries) {
    if (extension_vega_util_module_has(this.data, name)) {
      extension_vega_util_module_error('Duplicate data set name: ' + extension_$(name));
    }
    return this.addData(name, extension_DataScope.fromEntries(this, entries));
  }
};
function extension_propertyLambda(spec) {
  return (extension_vega_util_module_isArray(spec) ? extension_arrayLambda : extension_objectLambda)(spec);
}
function extension_arrayLambda(array) {
  const n = array.length;
  let code = '[';
  for (let i = 0; i < n; ++i) {
    const value = array[i];
    code += (i > 0 ? ',' : '') + (extension_vega_util_module_isObject(value) ? value.signal || extension_propertyLambda(value) : extension_$(value));
  }
  return code + ']';
}
function extension_objectLambda(obj) {
  let code = '{',
    i = 0,
    key,
    value;
  for (key in obj) {
    value = obj[key];
    code += (++i > 1 ? ',' : '') + extension_$(key) + ':' + (extension_vega_util_module_isObject(value) ? value.signal || extension_propertyLambda(value) : extension_$(value));
  }
  return code + '}';
}

/**
 * Standard configuration defaults for Vega specification parsing.
 * Users can provide their own (sub-)set of these default values
 * by passing in a config object to the top-level parse method.
 */
function extension_defaults () {
  const defaultFont = 'sans-serif',
    defaultSymbolSize = 30,
    defaultStrokeWidth = 2,
    defaultColor = '#4c78a8',
    black = '#000',
    gray = '#888',
    lightGray = '#ddd';
  return {
    // default visualization description
    description: 'Vega visualization',
    // default padding around visualization
    padding: 0,
    // default for automatic sizing; options: 'none', 'pad', 'fit'
    // or provide an object (e.g., {'type': 'pad', 'resize': true})
    autosize: 'pad',
    // default view background color
    // covers the entire view component
    background: null,
    // default event handling configuration
    // preventDefault for view-sourced event types except 'wheel'
    events: {
      defaults: {
        allow: ['wheel']
      }
    },
    // defaults for top-level group marks
    // accepts mark properties (fill, stroke, etc)
    // covers the data rectangle within group width/height
    group: null,
    // defaults for basic mark types
    // each subset accepts mark properties (fill, stroke, etc)
    mark: null,
    arc: {
      fill: defaultColor
    },
    area: {
      fill: defaultColor
    },
    image: null,
    line: {
      stroke: defaultColor,
      strokeWidth: defaultStrokeWidth
    },
    path: {
      stroke: defaultColor
    },
    rect: {
      fill: defaultColor
    },
    rule: {
      stroke: black
    },
    shape: {
      stroke: defaultColor
    },
    symbol: {
      fill: defaultColor,
      size: 64
    },
    text: {
      fill: black,
      font: defaultFont,
      fontSize: 11
    },
    trail: {
      fill: defaultColor,
      size: defaultStrokeWidth
    },
    // style definitions
    style: {
      // axis & legend labels
      'guide-label': {
        fill: black,
        font: defaultFont,
        fontSize: 10
      },
      // axis & legend titles
      'guide-title': {
        fill: black,
        font: defaultFont,
        fontSize: 11,
        fontWeight: 'bold'
      },
      // headers, including chart title
      'group-title': {
        fill: black,
        font: defaultFont,
        fontSize: 13,
        fontWeight: 'bold'
      },
      // chart subtitle
      'group-subtitle': {
        fill: black,
        font: defaultFont,
        fontSize: 12
      },
      // defaults for styled point marks in Vega-Lite
      point: {
        size: defaultSymbolSize,
        strokeWidth: defaultStrokeWidth,
        shape: 'circle'
      },
      circle: {
        size: defaultSymbolSize,
        strokeWidth: defaultStrokeWidth
      },
      square: {
        size: defaultSymbolSize,
        strokeWidth: defaultStrokeWidth,
        shape: 'square'
      },
      // defaults for styled group marks in Vega-Lite
      cell: {
        fill: 'transparent',
        stroke: lightGray
      },
      view: {
        fill: 'transparent'
      }
    },
    // defaults for title
    title: {
      orient: 'top',
      anchor: 'middle',
      offset: 4,
      subtitlePadding: 3
    },
    // defaults for axes
    axis: {
      minExtent: 0,
      maxExtent: 200,
      bandPosition: 0.5,
      domain: true,
      domainWidth: 1,
      domainColor: gray,
      grid: false,
      gridWidth: 1,
      gridColor: lightGray,
      labels: true,
      labelAngle: 0,
      labelLimit: 180,
      labelOffset: 0,
      labelPadding: 2,
      ticks: true,
      tickColor: gray,
      tickOffset: 0,
      tickRound: true,
      tickSize: 5,
      tickWidth: 1,
      titlePadding: 4
    },
    // correction for centering bias
    axisBand: {
      tickOffset: -0.5
    },
    // defaults for cartographic projection
    projection: {
      type: 'mercator'
    },
    // defaults for legends
    legend: {
      orient: 'right',
      padding: 0,
      gridAlign: 'each',
      columnPadding: 10,
      rowPadding: 2,
      symbolDirection: 'vertical',
      gradientDirection: 'vertical',
      gradientLength: 200,
      gradientThickness: 16,
      gradientStrokeColor: lightGray,
      gradientStrokeWidth: 0,
      gradientLabelOffset: 2,
      labelAlign: 'left',
      labelBaseline: 'middle',
      labelLimit: 160,
      labelOffset: 4,
      labelOverlap: true,
      symbolLimit: 30,
      symbolType: 'circle',
      symbolSize: 100,
      symbolOffset: 0,
      symbolStrokeWidth: 1.5,
      symbolBaseFillColor: 'transparent',
      symbolBaseStrokeColor: gray,
      titleLimit: 180,
      titleOrient: 'top',
      titlePadding: 5,
      layout: {
        offset: 18,
        direction: 'horizontal',
        left: {
          direction: 'vertical'
        },
        right: {
          direction: 'vertical'
        }
      }
    },
    // defaults for scale ranges
    range: {
      category: {
        scheme: 'tableau10'
      },
      ordinal: {
        scheme: 'blues'
      },
      heatmap: {
        scheme: 'yellowgreenblue'
      },
      ramp: {
        scheme: 'blues'
      },
      diverging: {
        scheme: 'blueorange',
        extent: [1, 0]
      },
      symbol: ['circle', 'square', 'triangle-up', 'cross', 'diamond', 'triangle-right', 'triangle-down', 'triangle-left']
    }
  };
}

function extension_vega_parser_module_parse (spec, config, options) {
  if (!extension_vega_util_module_isObject(spec)) {
    extension_vega_util_module_error('Input Vega specification must be an object.');
  }
  config = extension_mergeConfig(extension_defaults(), config, spec.config);
  return extension_parseView(spec, new extension_vega_parser_module_Scope(config, options)).toRuntime();
}



;// ../../node_modules/vega/build/vega.module.js





























var extension_vega_module_version = "5.30.0";

// -- Transforms -----

extension_extend(extension_transforms, extension_vega_transforms_module_namespaceObject, extension_vega_view_transforms_module_namespaceObject, extension_vega_encode_module_namespaceObject, extension_vega_geo_module_namespaceObject, extension_vega_force_module_namespaceObject, extension_vega_label_module_namespaceObject, extension_vega_hierarchy_module_namespaceObject, extension_vega_regression_module_namespaceObject, extension_vega_voronoi_module_namespaceObject, extension_vega_wordcloud_module_namespaceObject, extension_vega_crossfilter_module_namespaceObject);



;// ../../node_modules/vega-interpreter/build/vega-interpreter.module.js
function extension_vega_interpreter_module_adjustSpatial (item, encode, swap) {
  let t;
  if (encode.x2) {
    if (encode.x) {
      if (swap && item.x > item.x2) {
        t = item.x;
        item.x = item.x2;
        item.x2 = t;
      }
      item.width = item.x2 - item.x;
    } else {
      item.x = item.x2 - (item.width || 0);
    }
  }
  if (encode.xc) {
    item.x = item.xc - (item.width || 0) / 2;
  }
  if (encode.y2) {
    if (encode.y) {
      if (swap && item.y > item.y2) {
        t = item.y;
        item.y = item.y2;
        item.y2 = t;
      }
      item.height = item.y2 - item.y;
    } else {
      item.y = item.y2 - (item.height || 0);
    }
  }
  if (encode.yc) {
    item.y = item.yc - (item.height || 0) / 2;
  }
}

var extension_vega_interpreter_module_Constants = {
  NaN: NaN,
  E: Math.E,
  LN2: Math.LN2,
  LN10: Math.LN10,
  LOG2E: Math.LOG2E,
  LOG10E: Math.LOG10E,
  PI: Math.PI,
  SQRT1_2: Math.SQRT1_2,
  SQRT2: Math.SQRT2,
  MIN_VALUE: Number.MIN_VALUE,
  MAX_VALUE: Number.MAX_VALUE
};

var extension_Ops = {
  '*': (a, b) => a * b,
  '+': (a, b) => a + b,
  '-': (a, b) => a - b,
  '/': (a, b) => a / b,
  '%': (a, b) => a % b,
  '>': (a, b) => a > b,
  '<': (a, b) => a < b,
  '<=': (a, b) => a <= b,
  '>=': (a, b) => a >= b,
  '==': (a, b) => a == b,
  '!=': (a, b) => a != b,
  '===': (a, b) => a === b,
  '!==': (a, b) => a !== b,
  '&': (a, b) => a & b,
  '|': (a, b) => a | b,
  '^': (a, b) => a ^ b,
  '<<': (a, b) => a << b,
  '>>': (a, b) => a >> b,
  '>>>': (a, b) => a >>> b
};

var extension_Unary = {
  '+': a => +a,
  '-': a => -a,
  '~': a => ~a,
  '!': a => !a
};

const extension_vega_interpreter_module_slice = Array.prototype.slice;
const extension_vega_interpreter_module_apply = (m, args, cast) => {
  const obj = cast ? cast(args[0]) : args[0];
  return obj[m].apply(obj, extension_vega_interpreter_module_slice.call(args, 1));
};
const extension_vega_interpreter_module_datetime = (y, m, d, H, M, S, ms) => new Date(y, m || 0, d != null ? d : 1, H || 0, M || 0, S || 0, ms || 0);
var extension_vega_interpreter_module_Functions = {
  // math functions
  isNaN: Number.isNaN,
  isFinite: Number.isFinite,
  abs: Math.abs,
  acos: Math.acos,
  asin: Math.asin,
  atan: Math.atan,
  atan2: Math.atan2,
  ceil: Math.ceil,
  cos: Math.cos,
  exp: Math.exp,
  floor: Math.floor,
  log: Math.log,
  max: Math.max,
  min: Math.min,
  pow: Math.pow,
  random: Math.random,
  round: Math.round,
  sin: Math.sin,
  sqrt: Math.sqrt,
  tan: Math.tan,
  clamp: (a, b, c) => Math.max(b, Math.min(c, a)),
  // date functions
  now: Date.now,
  utc: Date.UTC,
  datetime: extension_vega_interpreter_module_datetime,
  date: d => new Date(d).getDate(),
  day: d => new Date(d).getDay(),
  year: d => new Date(d).getFullYear(),
  month: d => new Date(d).getMonth(),
  hours: d => new Date(d).getHours(),
  minutes: d => new Date(d).getMinutes(),
  seconds: d => new Date(d).getSeconds(),
  milliseconds: d => new Date(d).getMilliseconds(),
  time: d => new Date(d).getTime(),
  timezoneoffset: d => new Date(d).getTimezoneOffset(),
  utcdate: d => new Date(d).getUTCDate(),
  utcday: d => new Date(d).getUTCDay(),
  utcyear: d => new Date(d).getUTCFullYear(),
  utcmonth: d => new Date(d).getUTCMonth(),
  utchours: d => new Date(d).getUTCHours(),
  utcminutes: d => new Date(d).getUTCMinutes(),
  utcseconds: d => new Date(d).getUTCSeconds(),
  utcmilliseconds: d => new Date(d).getUTCMilliseconds(),
  // sequence functions
  length: x => x.length,
  join: function () {
    return extension_vega_interpreter_module_apply('join', arguments);
  },
  indexof: function () {
    return extension_vega_interpreter_module_apply('indexOf', arguments);
  },
  lastindexof: function () {
    return extension_vega_interpreter_module_apply('lastIndexOf', arguments);
  },
  slice: function () {
    return extension_vega_interpreter_module_apply('slice', arguments);
  },
  reverse: x => x.slice().reverse(),
  // string functions
  parseFloat: parseFloat,
  parseInt: parseInt,
  upper: x => String(x).toUpperCase(),
  lower: x => String(x).toLowerCase(),
  substring: function () {
    return extension_vega_interpreter_module_apply('substring', arguments, String);
  },
  split: function () {
    return extension_vega_interpreter_module_apply('split', arguments, String);
  },
  replace: function () {
    return extension_vega_interpreter_module_apply('replace', arguments, String);
  },
  trim: x => String(x).trim(),
  // regexp functions
  regexp: RegExp,
  test: (r, t) => RegExp(r).test(t)
};

const extension_EventFunctions = ['view', 'item', 'group', 'xy', 'x', 'y'];
const extension_DisallowedMethods = new Set([Function, eval, setTimeout, setInterval]);
if (typeof setImmediate === 'function') extension_DisallowedMethods.add(setImmediate);
const extension_Visitors = {
  Literal: ($, n) => n.value,
  Identifier: ($, n) => {
    const id = n.name;
    return $.memberDepth > 0 ? id : id === 'datum' ? $.datum : id === 'event' ? $.event : id === 'item' ? $.item : extension_vega_interpreter_module_Constants[id] || $.params['$' + id];
  },
  MemberExpression: ($, n) => {
    const d = !n.computed,
      o = $(n.object);
    if (d) $.memberDepth += 1;
    const p = $(n.property);
    if (d) $.memberDepth -= 1;
    if (extension_DisallowedMethods.has(o[p])) {
      // eslint-disable-next-line no-console
      console.error(`Prevented interpretation of member "${p}" which could lead to insecure code execution`);
      return;
    }
    return o[p];
  },
  CallExpression: ($, n) => {
    const args = n.arguments;
    let name = n.callee.name;

    // handle special internal functions used by encoders
    // re-route to corresponding standard function
    if (name.startsWith('_')) {
      name = name.slice(1);
    }

    // special case "if" due to conditional evaluation of branches
    return name === 'if' ? $(args[0]) ? $(args[1]) : $(args[2]) : ($.fn[name] || extension_vega_interpreter_module_Functions[name]).apply($.fn, args.map($));
  },
  ArrayExpression: ($, n) => n.elements.map($),
  BinaryExpression: ($, n) => extension_Ops[n.operator]($(n.left), $(n.right)),
  UnaryExpression: ($, n) => extension_Unary[n.operator]($(n.argument)),
  ConditionalExpression: ($, n) => $(n.test) ? $(n.consequent) : $(n.alternate),
  LogicalExpression: ($, n) => n.operator === '&&' ? $(n.left) && $(n.right) : $(n.left) || $(n.right),
  ObjectExpression: ($, n) => n.properties.reduce((o, p) => {
    $.memberDepth += 1;
    const k = $(p.key);
    $.memberDepth -= 1;
    if (extension_DisallowedMethods.has($(p.value))) {
      // eslint-disable-next-line no-console
      console.error(`Prevented interpretation of property "${k}" which could lead to insecure code execution`);
    } else {
      o[k] = $(p.value);
    }
    return o;
  }, {})
};
function extension_interpret (ast, fn, params, datum, event, item) {
  const $ = n => extension_Visitors[n.type]($, n);
  $.memberDepth = 0;
  $.fn = Object.create(fn);
  $.params = params;
  $.datum = datum;
  $.event = event;
  $.item = item;

  // route event functions to annotated vega event context
  extension_EventFunctions.forEach(f => $.fn[f] = function () {
    return event.vega[f](...arguments);
  });
  return $(ast);
}

var extension_vega_interpreter_module_expression = {
  /**
   * Parse an expression used to update an operator value.
   */
  operator(ctx, expr) {
    const ast = expr.ast,
      fn = ctx.functions;
    return _ => extension_interpret(ast, fn, _);
  },
  /**
   * Parse an expression provided as an operator parameter value.
   */
  parameter(ctx, expr) {
    const ast = expr.ast,
      fn = ctx.functions;
    return (datum, _) => extension_interpret(ast, fn, _, datum);
  },
  /**
   * Parse an expression applied to an event stream.
   */
  event(ctx, expr) {
    const ast = expr.ast,
      fn = ctx.functions;
    return event => extension_interpret(ast, fn, undefined, undefined, event);
  },
  /**
   * Parse an expression used to handle an event-driven operator update.
   */
  handler(ctx, expr) {
    const ast = expr.ast,
      fn = ctx.functions;
    return (_, event) => {
      const datum = event.item && event.item.datum;
      return extension_interpret(ast, fn, _, datum, event);
    };
  },
  /**
   * Parse an expression that performs visual encoding.
   */
  encode(ctx, encode) {
    const {
        marktype,
        channels
      } = encode,
      fn = ctx.functions,
      swap = marktype === 'group' || marktype === 'image' || marktype === 'rect';
    return (item, _) => {
      const datum = item.datum;
      let m = 0,
        v;
      for (const name in channels) {
        v = extension_interpret(channels[name].ast, fn, _, datum, undefined, item);
        if (item[name] !== v) {
          item[name] = v;
          m = 1;
        }
      }
      if (marktype !== 'rule') {
        extension_vega_interpreter_module_adjustSpatial(item, channels, swap);
      }
      return m;
    };
  }
};



;// ../../node_modules/vega-lite/build/package.json
const extension_build_package_namespaceObject = {"rE":"5.23.0"};
;// ../../node_modules/vega-lite/build/src/logical.js

function extension_isLogicalOr(op) {
    return extension_util_hasProperty(op, 'or');
}
function extension_isLogicalAnd(op) {
    return extension_util_hasProperty(op, 'and');
}
function extension_isLogicalNot(op) {
    return extension_util_hasProperty(op, 'not');
}
function extension_forEachLeaf(op, fn) {
    if (extension_isLogicalNot(op)) {
        extension_forEachLeaf(op.not, fn);
    }
    else if (extension_isLogicalAnd(op)) {
        for (const subop of op.and) {
            extension_forEachLeaf(subop, fn);
        }
    }
    else if (extension_isLogicalOr(op)) {
        for (const subop of op.or) {
            extension_forEachLeaf(subop, fn);
        }
    }
    else {
        fn(op);
    }
}
function extension_normalizeLogicalComposition(op, normalizer) {
    if (extension_isLogicalNot(op)) {
        return { not: extension_normalizeLogicalComposition(op.not, normalizer) };
    }
    else if (extension_isLogicalAnd(op)) {
        return { and: op.and.map(o => extension_normalizeLogicalComposition(o, normalizer)) };
    }
    else if (extension_isLogicalOr(op)) {
        return { or: op.or.map(o => extension_normalizeLogicalComposition(o, normalizer)) };
    }
    else {
        return normalizer(op);
    }
}
//# sourceMappingURL=logical.js.map
;// ../../node_modules/vega-lite/build/src/util.js


const extension_duplicate = structuredClone;
function extension_never(message) {
    throw new Error(message);
}
/**
 * Creates an object composed of the picked object properties.
 *
 * var object = {'a': 1, 'b': '2', 'c': 3};
 * pick(object, ['a', 'c']);
 * // → {'a': 1, 'c': 3}
 */
// eslint-disable-next-line @typescript-eslint/ban-types
function extension_util_pick(obj, props) {
    const copy = {};
    for (const prop of props) {
        if (extension_vega_util_module_has(obj, prop)) {
            copy[prop] = obj[prop];
        }
    }
    return copy;
}
/**
 * The opposite of _.pick; this method creates an object composed of the own
 * and inherited enumerable string keyed properties of object that are not omitted.
 */
// eslint-disable-next-line @typescript-eslint/ban-types
function extension_omit(obj, props) {
    const copy = { ...obj };
    for (const prop of props) {
        delete copy[prop];
    }
    return copy;
}
/**
 * Monkey patch Set so that `stringify` produces a string representation of sets.
 */
Set.prototype['toJSON'] = function () {
    return `Set(${[...this].map(x => extension_util_stringify(x)).join(',')})`;
};
/**
 * Converts any object to a string of limited size, or a number.
 */
function extension_util_hash(a) {
    if (extension_vega_util_module_isNumber(a)) {
        return a;
    }
    const str = extension_vega_util_module_isString(a) ? a : extension_util_stringify(a);
    // short strings can be used as hash directly, longer strings are hashed to reduce memory usage
    if (str.length < 250) {
        return str;
    }
    // from http://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
    let h = 0;
    for (let i = 0; i < str.length; i++) {
        const char = str.charCodeAt(i);
        h = (h << 5) - h + char;
        h = h & h; // Convert to 32bit integer
    }
    return h;
}
function extension_isNullOrFalse(x) {
    return x === false || x === null;
}
function extension_util_contains(array, item) {
    return array.includes(item);
}
/**
 * Returns true if any item returns true.
 */
function extension_some(arr, f) {
    let i = 0;
    for (const [k, a] of arr.entries()) {
        if (f(a, k, i++)) {
            return true;
        }
    }
    return false;
}
/**
 * Returns true if all items return true.
 */
function extension_every(arr, f) {
    let i = 0;
    for (const [k, a] of arr.entries()) {
        if (!f(a, k, i++)) {
            return false;
        }
    }
    return true;
}
/**
 * recursively merges src into dest
 */
function extension_mergeDeep(dest, ...src) {
    for (const s of src) {
        extension_deepMerge_(dest, s ?? {});
    }
    return dest;
}
function extension_deepMerge_(dest, src) {
    for (const property of extension_util_keys(src)) {
        extension_writeConfig(dest, property, src[property], true);
    }
}
function extension_unique(values, f) {
    const results = [];
    const u = {};
    let v;
    for (const val of values) {
        v = f(val);
        if (v in u) {
            continue;
        }
        u[v] = 1;
        results.push(val);
    }
    return results;
}
/**
 * Returns true if the two dictionaries agree. Applies only to defined values.
 */
function extension_isEqual(dict, other) {
    const dictKeys = extension_util_keys(dict);
    const otherKeys = extension_util_keys(other);
    if (dictKeys.length !== otherKeys.length) {
        return false;
    }
    for (const key of dictKeys) {
        if (dict[key] !== other[key]) {
            return false;
        }
    }
    return true;
}
function extension_setEqual(a, b) {
    if (a.size !== b.size) {
        return false;
    }
    for (const e of a) {
        if (!b.has(e)) {
            return false;
        }
    }
    return true;
}
function extension_hasIntersection(a, b) {
    for (const key of a) {
        if (b.has(key)) {
            return true;
        }
    }
    return false;
}
function extension_prefixGenerator(a) {
    const prefixes = new Set();
    for (const x of a) {
        const splitField = extension_splitAccessPath(x);
        // Wrap every element other than the first in `[]`
        const wrappedWithAccessors = splitField.map((y, i) => (i === 0 ? y : `[${y}]`));
        const computedPrefixes = wrappedWithAccessors.map((_, i) => wrappedWithAccessors.slice(0, i + 1).join(''));
        for (const y of computedPrefixes) {
            prefixes.add(y);
        }
    }
    return prefixes;
}
/**
 * Returns true if a and b have an intersection. Also return true if a or b are undefined
 * since this means we don't know what fields a node produces or depends on.
 */
function extension_fieldIntersection(a, b) {
    if (a === undefined || b === undefined) {
        return true;
    }
    return extension_hasIntersection(extension_prefixGenerator(a), extension_prefixGenerator(b));
}
// eslint-disable-next-line @typescript-eslint/ban-types
function extension_isEmpty(obj) {
    return extension_util_keys(obj).length === 0;
}
// This is a stricter version of Object.keys but with better types. See https://github.com/Microsoft/TypeScript/pull/12253#issuecomment-263132208
const extension_util_keys = Object.keys;
// Stricter version from https://github.com/microsoft/TypeScript/issues/51572#issuecomment-1319153323
const extension_vals = Object.values;
// Stricter version from https://github.com/microsoft/TypeScript/issues/51572#issuecomment-1319153323
const extension_util_entries = Object.entries;
function extension_util_isBoolean(b) {
    return b === true || b === false;
}
/**
 * Convert a string into a valid variable name
 */
function extension_varName(s) {
    // Replace non-alphanumeric characters (anything besides a-zA-Z0-9_) with _
    const alphanumericS = s.replace(/\W/g, '_');
    // Add _ if the string has leading numbers.
    return (s.match(/^\d+/) ? '_' : '') + alphanumericS;
}
function extension_logicalExpr(op, cb) {
    if (extension_isLogicalNot(op)) {
        return `!(${extension_logicalExpr(op.not, cb)})`;
    }
    else if (extension_isLogicalAnd(op)) {
        return `(${op.and.map((and) => extension_logicalExpr(and, cb)).join(') && (')})`;
    }
    else if (extension_isLogicalOr(op)) {
        return `(${op.or.map((or) => extension_logicalExpr(or, cb)).join(') || (')})`;
    }
    else {
        return cb(op);
    }
}
/**
 * Delete nested property of an object, and delete the ancestors of the property if they become empty.
 */
function extension_deleteNestedProperty(obj, orderedProps) {
    if (orderedProps.length === 0) {
        return true;
    }
    const prop = orderedProps.shift(); // eslint-disable-line @typescript-eslint/no-non-null-assertion
    if (prop in obj && extension_deleteNestedProperty(obj[prop], orderedProps)) {
        delete obj[prop];
    }
    return extension_isEmpty(obj);
}
function extension_titleCase(s) {
    return s.charAt(0).toUpperCase() + s.substr(1);
}
/**
 * Converts a path to an access path with datum.
 * @param path The field name.
 * @param datum The string to use for `datum`.
 */
function extension_accessPathWithDatum(path, datum = 'datum') {
    const pieces = extension_splitAccessPath(path);
    const prefixes = [];
    for (let i = 1; i <= pieces.length; i++) {
        const prefix = `[${pieces.slice(0, i).map(extension_$).join('][')}]`;
        prefixes.push(`${datum}${prefix}`);
    }
    return prefixes.join(' && ');
}
/**
 * Return access with datum to the flattened field.
 *
 * @param path The field name.
 * @param datum The string to use for `datum`.
 */
function extension_flatAccessWithDatum(path, datum = 'datum') {
    return `${datum}[${extension_$(extension_splitAccessPath(path).join('.'))}]`;
}
/**
 * Return access with datum to **an unescaped path**.
 *
 * ```ts
 * console.log(accessWithDatumToUnescapedPath("vega's favorite"))
 * // "datum['vega\\'s favorite']"
 * ```
 *
 * @param path The unescaped path name. E.g., `"a.b"`, `"vega's favorite"`. (Note
 * that the field defs take escaped strings like `"a\\.b"`, `"vega\\'s favorite"`,
 * but this function is for the unescaped field/path)
 */
function extension_accessWithDatumToUnescapedPath(unescapedPath) {
    const singleQuoteEscapedPath = unescapedPath.replaceAll("'", "\\'");
    return `datum['${singleQuoteEscapedPath}']`;
}
function extension_escapePathAccess(string) {
    return string.replace(/(\[|\]|\.|'|")/g, '\\$1');
}
/**
 * Replaces path accesses with access to non-nested field.
 * For example, `foo["bar"].baz` becomes `foo\\.bar\\.baz`.
 */
function extension_replacePathInField(path) {
    return `${extension_splitAccessPath(path).map(extension_escapePathAccess).join('\\.')}`;
}
/**
 * Replace all occurrences of a string with another string.
 *
 * @param string the string to replace in
 * @param find the string to replace
 * @param replacement the replacement
 */
function extension_replaceAll(string, find, replacement) {
    return string.replace(new RegExp(find.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&'), 'g'), replacement);
}
/**
 * Remove path accesses with access from field.
 * For example, `foo["bar"].baz` becomes `foo.bar.baz`.
 */
function extension_removePathFromField(path) {
    return `${extension_splitAccessPath(path).join('.')}`;
}
/**
 * Count the depth of the path. Returns 1 for fields that are not nested.
 */
function extension_accessPathDepth(path) {
    if (!path) {
        return 0;
    }
    return extension_splitAccessPath(path).length;
}
/**
 * This is a replacement for chained || for numeric properties or properties that respect null so that 0 will be included.
 */
function extension_getFirstDefined(...args) {
    return args.find(a => a !== undefined);
}
// variable used to generate id
let extension_idCounter = 42;
/**
 * Returns a new random id every time it gets called.
 *
 * Has side effect!
 */
function extension_uniqueId(prefix) {
    const id = ++extension_idCounter;
    return prefix ? String(prefix) + id : id;
}
/**
 * Resets the id counter used in uniqueId. This can be useful for testing.
 */
function extension_resetIdCounter() {
    extension_idCounter = 42;
}
function extension_internalField(name) {
    return extension_isInternalField(name) ? name : `__${name}`;
}
function extension_isInternalField(name) {
    return name.startsWith('__');
}
/**
 * Normalize angle to be within [0,360).
 */
function extension_normalizeAngle(angle) {
    if (angle === undefined) {
        return undefined;
    }
    return ((angle % 360) + 360) % 360;
}
/**
 * Returns whether the passed in value is a valid number.
 */
function extension_isNumeric(value) {
    if (extension_vega_util_module_isNumber(value)) {
        return true;
    }
    return !isNaN(value) && !isNaN(parseFloat(value));
}
const extension_clonedProto = Object.getPrototypeOf(structuredClone({}));
/**
 * Compares two values for equality, including arrays and objects.
 *
 * Adapted from https://github.com/epoberezkin/fast-deep-equal.
 */
function extension_util_deepEqual(a, b) {
    if (a === b)
        return true;
    if (a && b && typeof a == 'object' && typeof b == 'object') {
        // compare names to avoid issues with structured clone
        if (a.constructor.name !== b.constructor.name)
            return false;
        let length;
        let i;
        if (Array.isArray(a)) {
            length = a.length;
            if (length != b.length)
                return false;
            for (i = length; i-- !== 0;)
                if (!extension_util_deepEqual(a[i], b[i]))
                    return false;
            return true;
        }
        if (a instanceof Map && b instanceof Map) {
            if (a.size !== b.size)
                return false;
            for (const e of a.entries())
                if (!b.has(e[0]))
                    return false;
            for (const e of a.entries())
                if (!extension_util_deepEqual(e[1], b.get(e[0])))
                    return false;
            return true;
        }
        if (a instanceof Set && b instanceof Set) {
            if (a.size !== b.size)
                return false;
            for (const e of a.entries())
                if (!b.has(e[0]))
                    return false;
            return true;
        }
        if (ArrayBuffer.isView(a) && ArrayBuffer.isView(b)) {
            length = a.length;
            if (length != b.length)
                return false;
            for (i = length; i-- !== 0;)
                if (a[i] !== b[i])
                    return false;
            return true;
        }
        if (a.constructor === RegExp)
            return a.source === b.source && a.flags === b.flags;
        // also compare to structured clone prototype
        if (a.valueOf !== Object.prototype.valueOf && a.valueOf !== extension_clonedProto.valueOf)
            return a.valueOf() === b.valueOf();
        if (a.toString !== Object.prototype.toString && a.toString !== extension_clonedProto.toString)
            return a.toString() === b.toString();
        const ks = Object.keys(a);
        length = ks.length;
        if (length !== Object.keys(b).length)
            return false;
        for (i = length; i-- !== 0;)
            if (!Object.prototype.hasOwnProperty.call(b, ks[i]))
                return false;
        for (i = length; i-- !== 0;) {
            const key = ks[i];
            if (!extension_util_deepEqual(a[key], b[key]))
                return false;
        }
        return true;
    }
    // true if both NaN, false otherwise
    return a !== a && b !== b;
}
/**
 * Converts any object to a string representation that can be consumed by humans.
 *
 * Adapted from https://github.com/epoberezkin/fast-json-stable-stringify
 */
function extension_util_stringify(data) {
    const seen = [];
    return (function _stringify(node) {
        if (node && node.toJSON && typeof node.toJSON === 'function') {
            node = node.toJSON();
        }
        if (node === undefined)
            return undefined;
        if (typeof node == 'number')
            return isFinite(node) ? '' + node : 'null';
        if (typeof node !== 'object')
            return JSON.stringify(node);
        let i, out;
        if (Array.isArray(node)) {
            out = '[';
            for (i = 0; i < node.length; i++) {
                if (i)
                    out += ',';
                out += _stringify(node[i]) || 'null';
            }
            return out + ']';
        }
        if (node === null)
            return 'null';
        if (seen.includes(node)) {
            throw new TypeError('Converting circular structure to JSON');
        }
        const seenIndex = seen.push(node) - 1;
        const ks = Object.keys(node).sort();
        out = '';
        for (i = 0; i < ks.length; i++) {
            const key = ks[i];
            const value = _stringify(node[key]);
            if (!value)
                continue;
            if (out)
                out += ',';
            out += JSON.stringify(key) + ':' + value;
        }
        seen.splice(seenIndex, 1);
        return `{${out}}`;
    })(data);
}
/**
 * Check if the input object has the property and it's not undefined.
 *
 * @param object the object
 * @param property the property to search
 * @returns if the object has the property and it's not undefined.
 */
function extension_util_hasProperty(obj, key) {
    return extension_vega_util_module_isObject(obj) && extension_vega_util_module_has(obj, key) && obj[key] !== undefined;
}
//# sourceMappingURL=util.js.map
;// ../../node_modules/vega-lite/build/src/channel.js
/*
 * Constants and utilities for encoding channels (Visual variables)
 * such as 'x', 'y', 'color'.
 */


// Facet
const extension_ROW = 'row';
const extension_COLUMN = 'column';
const extension_FACET = 'facet';
// Position
const extension_channel_X = 'x';
const extension_channel_Y = 'y';
const extension_channel_X2 = 'x2';
const extension_channel_Y2 = 'y2';
// Position Offset
const extension_XOFFSET = 'xOffset';
const extension_YOFFSET = 'yOffset';
// Arc-Position
const extension_RADIUS = 'radius';
const extension_RADIUS2 = 'radius2';
const extension_THETA = 'theta';
const extension_THETA2 = 'theta2';
// Geo Position
const extension_LATITUDE = 'latitude';
const extension_LONGITUDE = 'longitude';
const extension_LATITUDE2 = 'latitude2';
const extension_LONGITUDE2 = 'longitude2';
// Time
const extension_TIME = 'time';
// Mark property with scale
const extension_COLOR = 'color';
const extension_FILL = 'fill';
const extension_STROKE = 'stroke';
const extension_SHAPE = 'shape';
const extension_channel_SIZE = 'size';
const extension_ANGLE = 'angle';
const extension_OPACITY = 'opacity';
const extension_FILLOPACITY = 'fillOpacity';
const extension_STROKEOPACITY = 'strokeOpacity';
const extension_STROKEWIDTH = 'strokeWidth';
const extension_STROKEDASH = 'strokeDash';
// Non-scale channel
const extension_TEXT = 'text';
const extension_ORDER = 'order';
const extension_DETAIL = 'detail';
const extension_KEY = 'key';
const extension_TOOLTIP = 'tooltip';
const extension_HREF = 'href';
const extension_channel_URL = 'url';
const extension_DESCRIPTION = 'description';
const extension_POSITION_CHANNEL_INDEX = {
    x: 1,
    y: 1,
    x2: 1,
    y2: 1
};
const extension_POLAR_POSITION_CHANNEL_INDEX = {
    theta: 1,
    theta2: 1,
    radius: 1,
    radius2: 1
};
function extension_isPolarPositionChannel(c) {
    return extension_vega_util_module_has(extension_POLAR_POSITION_CHANNEL_INDEX, c);
}
const extension_GEO_POSIITON_CHANNEL_INDEX = {
    longitude: 1,
    longitude2: 1,
    latitude: 1,
    latitude2: 1
};
function extension_getPositionChannelFromLatLong(channel) {
    switch (channel) {
        case extension_LATITUDE:
            return 'y';
        case extension_LATITUDE2:
            return 'y2';
        case extension_LONGITUDE:
            return 'x';
        case extension_LONGITUDE2:
            return 'x2';
    }
}
function extension_isGeoPositionChannel(c) {
    return extension_vega_util_module_has(extension_GEO_POSIITON_CHANNEL_INDEX, c);
}
const extension_GEOPOSITION_CHANNELS = extension_util_keys(extension_GEO_POSIITON_CHANNEL_INDEX);
const extension_UNIT_CHANNEL_INDEX = {
    ...extension_POSITION_CHANNEL_INDEX,
    ...extension_POLAR_POSITION_CHANNEL_INDEX,
    ...extension_GEO_POSIITON_CHANNEL_INDEX,
    xOffset: 1,
    yOffset: 1,
    // color
    color: 1,
    fill: 1,
    stroke: 1,
    // time
    time: 1,
    // other non-position with scale
    opacity: 1,
    fillOpacity: 1,
    strokeOpacity: 1,
    strokeWidth: 1,
    strokeDash: 1,
    size: 1,
    angle: 1,
    shape: 1,
    // channels without scales
    order: 1,
    text: 1,
    detail: 1,
    key: 1,
    tooltip: 1,
    href: 1,
    url: 1,
    description: 1
};
function extension_isColorChannel(channel) {
    return channel === extension_COLOR || channel === extension_FILL || channel === extension_STROKE;
}
const extension_FACET_CHANNEL_INDEX = {
    row: 1,
    column: 1,
    facet: 1
};
const extension_FACET_CHANNELS = extension_util_keys(extension_FACET_CHANNEL_INDEX);
const extension_CHANNEL_INDEX = {
    ...extension_UNIT_CHANNEL_INDEX,
    ...extension_FACET_CHANNEL_INDEX
};
const extension_CHANNELS = extension_util_keys(extension_CHANNEL_INDEX);
const { order: extension_o, detail: extension_d, tooltip: extension_tt1, ...extension_SINGLE_DEF_CHANNEL_INDEX } = extension_CHANNEL_INDEX;
const { row: extension_r, column: src_extension_c, facet: extension_f, ...extension_SINGLE_DEF_UNIT_CHANNEL_INDEX } = extension_SINGLE_DEF_CHANNEL_INDEX;
/**
 * Channels that cannot have an array of channelDef.
 * model.fieldDef, getFieldDef only work for these channels.
 *
 * (The only two channels that can have an array of channelDefs are "detail" and "order".
 * Since there can be multiple fieldDefs for detail and order, getFieldDef/model.fieldDef
 * are not applicable for them. Similarly, selection projection won't work with "detail" and "order".)
 */
const extension_SINGLE_DEF_CHANNELS = extension_util_keys(extension_SINGLE_DEF_CHANNEL_INDEX);
const extension_SINGLE_DEF_UNIT_CHANNELS = extension_util_keys(extension_SINGLE_DEF_UNIT_CHANNEL_INDEX);
function extension_isSingleDefUnitChannel(str) {
    return extension_vega_util_module_has(extension_SINGLE_DEF_UNIT_CHANNEL_INDEX, str);
}
function extension_isChannel(str) {
    return extension_vega_util_module_has(extension_CHANNEL_INDEX, str);
}
const extension_SECONDARY_RANGE_CHANNEL = [extension_channel_X2, extension_channel_Y2, extension_LATITUDE2, extension_LONGITUDE2, extension_THETA2, extension_RADIUS2];
function extension_isSecondaryRangeChannel(c) {
    const main = extension_getMainRangeChannel(c);
    return main !== c;
}
/**
 * Get the main channel for a range channel. E.g. `x` for `x2`.
 */
function extension_getMainRangeChannel(channel) {
    switch (channel) {
        case extension_channel_X2:
            return extension_channel_X;
        case extension_channel_Y2:
            return extension_channel_Y;
        case extension_LATITUDE2:
            return extension_LATITUDE;
        case extension_LONGITUDE2:
            return extension_LONGITUDE;
        case extension_THETA2:
            return extension_THETA;
        case extension_RADIUS2:
            return extension_RADIUS;
    }
    return channel;
}
function extension_getVgPositionChannel(channel) {
    if (extension_isPolarPositionChannel(channel)) {
        switch (channel) {
            case extension_THETA:
                return 'startAngle';
            case extension_THETA2:
                return 'endAngle';
            case extension_RADIUS:
                return 'outerRadius';
            case extension_RADIUS2:
                return 'innerRadius';
        }
    }
    return channel;
}
/**
 * Get the main channel for a range channel. E.g. `x` for `x2`.
 */
function extension_getSecondaryRangeChannel(channel) {
    switch (channel) {
        case extension_channel_X:
            return extension_channel_X2;
        case extension_channel_Y:
            return extension_channel_Y2;
        case extension_LATITUDE:
            return extension_LATITUDE2;
        case extension_LONGITUDE:
            return extension_LONGITUDE2;
        case extension_THETA:
            return extension_THETA2;
        case extension_RADIUS:
            return extension_RADIUS2;
    }
    return undefined;
}
function extension_getSizeChannel(channel) {
    switch (channel) {
        case extension_channel_X:
        case extension_channel_X2:
            return 'width';
        case extension_channel_Y:
        case extension_channel_Y2:
            return 'height';
    }
    return undefined;
}
/**
 * Get the main channel for a range channel. E.g. `x` for `x2`.
 */
function extension_getOffsetChannel(channel) {
    switch (channel) {
        case extension_channel_X:
            return 'xOffset';
        case extension_channel_Y:
            return 'yOffset';
        case extension_channel_X2:
            return 'x2Offset';
        case extension_channel_Y2:
            return 'y2Offset';
        case extension_THETA:
            return 'thetaOffset';
        case extension_RADIUS:
            return 'radiusOffset';
        case extension_THETA2:
            return 'theta2Offset';
        case extension_RADIUS2:
            return 'radius2Offset';
    }
    return undefined;
}
/**
 * Get the main channel for a range channel. E.g. `x` for `x2`.
 */
function extension_getOffsetScaleChannel(channel) {
    switch (channel) {
        case extension_channel_X:
            return 'xOffset';
        case extension_channel_Y:
            return 'yOffset';
    }
    return undefined;
}
function extension_getMainChannelFromOffsetChannel(channel) {
    switch (channel) {
        case 'xOffset':
            return 'x';
        case 'yOffset':
            return 'y';
    }
}
// CHANNELS without COLUMN, ROW
const extension_UNIT_CHANNELS = extension_util_keys(extension_UNIT_CHANNEL_INDEX);
// NONPOSITION_CHANNELS = UNIT_CHANNELS without X, Y, X2, Y2;
const { x: src_extension_x, y: src_extension_y, 
// x2 and y2 share the same scale as x and y
x2: extension_x2, y2: extension_y2, 
//
xOffset: extension_xo, yOffset: extension_yo, latitude: extension_latitude, longitude: src_extension_longitude, latitude2: extension_latitude2, longitude2: extension_longitude2, theta: extension_theta, theta2: extension_theta2, radius: src_extension_radius, radius2: extension_radius2, 
// The rest of unit channels then have scale
...extension_NONPOSITION_CHANNEL_INDEX } = extension_UNIT_CHANNEL_INDEX;
const extension_NONPOSITION_CHANNELS = extension_util_keys(extension_NONPOSITION_CHANNEL_INDEX);
const extension_POSITION_SCALE_CHANNEL_INDEX = {
    x: 1,
    y: 1
};
const extension_POSITION_SCALE_CHANNELS = extension_util_keys(extension_POSITION_SCALE_CHANNEL_INDEX);
function extension_isXorY(channel) {
    return extension_vega_util_module_has(extension_POSITION_SCALE_CHANNEL_INDEX, channel);
}
const extension_POLAR_POSITION_SCALE_CHANNEL_INDEX = {
    theta: 1,
    radius: 1
};
const extension_POLAR_POSITION_SCALE_CHANNELS = extension_util_keys(extension_POLAR_POSITION_SCALE_CHANNEL_INDEX);
function extension_getPositionScaleChannel(sizeType) {
    return sizeType === 'width' ? extension_channel_X : extension_channel_Y;
}
const extension_OFFSET_SCALE_CHANNEL_INDEX = { xOffset: 1, yOffset: 1 };
const extension_OFFSET_SCALE_CHANNELS = extension_util_keys(extension_OFFSET_SCALE_CHANNEL_INDEX);
function extension_isXorYOffset(channel) {
    return extension_vega_util_module_has(extension_OFFSET_SCALE_CHANNEL_INDEX, channel);
}
const extension_TIME_SCALE_CHANNEL_INDEX = {
    time: 1
};
const extension_TIME_SCALE_CHANNELS = extension_util_keys(extension_TIME_SCALE_CHANNEL_INDEX);
function extension_isTime(channel) {
    return channel in extension_TIME_SCALE_CHANNEL_INDEX;
}
// NON_POSITION_SCALE_CHANNEL = SCALE_CHANNELS without position / offset
const { 
// x2 and y2 share the same scale as x and y
// text and tooltip have format instead of scale,
// href has neither format, nor scale
text: src_extension_t, tooltip: extension_tt, href: extension_hr, url: src_extension_u, description: extension_al, 
// detail and order have no scale
detail: extension_dd, key: src_extension_k, order: extension_oo, ...extension_NONPOSITION_SCALE_CHANNEL_INDEX } = extension_NONPOSITION_CHANNEL_INDEX;
const extension_NONPOSITION_SCALE_CHANNELS = extension_util_keys(extension_NONPOSITION_SCALE_CHANNEL_INDEX);
function extension_isNonPositionScaleChannel(channel) {
    return extension_vega_util_module_has(extension_NONPOSITION_CHANNEL_INDEX, channel);
}
/**
 * @returns whether Vega supports legends for a particular channel
 */
function extension_supportLegend(channel) {
    switch (channel) {
        case extension_COLOR:
        case extension_FILL:
        case extension_STROKE:
        case extension_channel_SIZE:
        case extension_SHAPE:
        case extension_OPACITY:
        case extension_STROKEWIDTH:
        case extension_STROKEDASH:
            return true;
        case extension_FILLOPACITY:
        case extension_STROKEOPACITY:
        case extension_ANGLE:
        case extension_TIME:
            return false;
    }
}
// Declare SCALE_CHANNEL_INDEX
const extension_SCALE_CHANNEL_INDEX = {
    ...extension_POSITION_SCALE_CHANNEL_INDEX,
    ...extension_POLAR_POSITION_SCALE_CHANNEL_INDEX,
    ...extension_OFFSET_SCALE_CHANNEL_INDEX,
    ...extension_NONPOSITION_SCALE_CHANNEL_INDEX
};
/** List of channels with scales */
const extension_SCALE_CHANNELS = extension_util_keys(extension_SCALE_CHANNEL_INDEX);
function extension_isScaleChannel(channel) {
    return extension_vega_util_module_has(extension_SCALE_CHANNEL_INDEX, channel);
}
/**
 * Return whether a channel supports a particular mark type.
 * @param channel  channel name
 * @param mark the mark type
 * @return whether the mark supports the channel
 */
function extension_supportMark(channel, mark) {
    return extension_getSupportedMark(channel)[mark];
}
const extension_ALL_MARKS = {
    // all marks
    arc: 'always',
    area: 'always',
    bar: 'always',
    circle: 'always',
    geoshape: 'always',
    image: 'always',
    line: 'always',
    rule: 'always',
    point: 'always',
    rect: 'always',
    square: 'always',
    trail: 'always',
    text: 'always',
    tick: 'always'
};
const { geoshape: extension_g, ...extension_ALL_MARKS_EXCEPT_GEOSHAPE } = extension_ALL_MARKS;
/**
 * Return a dictionary showing whether a channel supports mark type.
 * @param channel
 * @return A dictionary mapping mark types to 'always', 'binned', or undefined
 */
function extension_getSupportedMark(channel) {
    switch (channel) {
        case extension_COLOR:
        case extension_FILL:
        case extension_STROKE:
        // falls through
        case extension_DESCRIPTION:
        case extension_DETAIL:
        case extension_KEY:
        case extension_TOOLTIP:
        case extension_HREF:
        case extension_ORDER: // TODO: revise (order might not support rect, which is not stackable?)
        case extension_OPACITY:
        case extension_FILLOPACITY:
        case extension_STROKEOPACITY:
        case extension_STROKEWIDTH:
        // falls through
        case extension_FACET:
        case extension_ROW: // falls through
        case extension_COLUMN:
            return extension_ALL_MARKS;
        case extension_channel_X:
        case extension_channel_Y:
        case extension_XOFFSET:
        case extension_YOFFSET:
        case extension_LATITUDE:
        case extension_LONGITUDE:
        case extension_TIME:
            // all marks except geoshape. geoshape does not use X, Y -- it uses a projection
            return extension_ALL_MARKS_EXCEPT_GEOSHAPE;
        case extension_channel_X2:
        case extension_channel_Y2:
        case extension_LATITUDE2:
        case extension_LONGITUDE2:
            return {
                area: 'always',
                bar: 'always',
                image: 'always',
                rect: 'always',
                rule: 'always',
                circle: 'binned',
                point: 'binned',
                square: 'binned',
                tick: 'binned',
                line: 'binned',
                trail: 'binned'
            };
        case extension_channel_SIZE:
            return {
                point: 'always',
                tick: 'always',
                rule: 'always',
                circle: 'always',
                square: 'always',
                bar: 'always',
                text: 'always',
                line: 'always',
                trail: 'always'
            };
        case extension_STROKEDASH:
            return {
                line: 'always',
                point: 'always',
                tick: 'always',
                rule: 'always',
                circle: 'always',
                square: 'always',
                bar: 'always',
                geoshape: 'always'
            };
        case extension_SHAPE:
            return { point: 'always', geoshape: 'always' };
        case extension_TEXT:
            return { text: 'always' };
        case extension_ANGLE:
            return { point: 'always', square: 'always', text: 'always' };
        case extension_channel_URL:
            return { image: 'always' };
        case extension_THETA:
            return { text: 'always', arc: 'always' };
        case extension_RADIUS:
            return { text: 'always', arc: 'always' };
        case extension_THETA2:
        case extension_RADIUS2:
            return { arc: 'always' };
    }
}
function extension_rangeType(channel) {
    switch (channel) {
        case extension_channel_X:
        case extension_channel_Y:
        case extension_THETA:
        case extension_RADIUS:
        case extension_XOFFSET:
        case extension_YOFFSET:
        case extension_channel_SIZE:
        case extension_ANGLE:
        case extension_STROKEWIDTH:
        case extension_OPACITY:
        case extension_FILLOPACITY:
        case extension_STROKEOPACITY:
        case extension_TIME:
        // X2 and Y2 use X and Y scales, so they similarly have continuous range. [falls through]
        case extension_channel_X2:
        case extension_channel_Y2:
        case extension_THETA2:
        case extension_RADIUS2:
            return undefined;
        case extension_FACET:
        case extension_ROW:
        case extension_COLUMN:
        case extension_SHAPE:
        case extension_STROKEDASH:
        // TEXT, TOOLTIP, URL, and HREF have no scale but have discrete output [falls through]
        case extension_TEXT:
        case extension_TOOLTIP:
        case extension_HREF:
        case extension_channel_URL:
        case extension_DESCRIPTION:
            return 'discrete';
        // Color can be either continuous or discrete, depending on scale type.
        case extension_COLOR:
        case extension_FILL:
        case extension_STROKE:
            return 'flexible';
        // No scale, no range type.
        case extension_LATITUDE:
        case extension_LONGITUDE:
        case extension_LATITUDE2:
        case extension_LONGITUDE2:
        case extension_DETAIL:
        case extension_KEY:
        case extension_ORDER:
            return undefined;
    }
}
//# sourceMappingURL=channel.js.map
;// ../../node_modules/vega-lite/build/src/aggregate.js


const extension_AGGREGATE_OP_INDEX = {
    argmax: 1,
    argmin: 1,
    average: 1,
    count: 1,
    distinct: 1,
    exponential: 1,
    exponentialb: 1,
    product: 1,
    max: 1,
    mean: 1,
    median: 1,
    min: 1,
    missing: 1,
    q1: 1,
    q3: 1,
    ci0: 1,
    ci1: 1,
    stderr: 1,
    stdev: 1,
    stdevp: 1,
    sum: 1,
    valid: 1,
    values: 1,
    variance: 1,
    variancep: 1
};
const extension_MULTIDOMAIN_SORT_OP_INDEX = {
    count: 1,
    min: 1,
    max: 1
};
function extension_isArgminDef(a) {
    return extension_util_hasProperty(a, 'argmin');
}
function extension_isArgmaxDef(a) {
    return extension_util_hasProperty(a, 'argmax');
}
function extension_isAggregateOp(a) {
    return extension_vega_util_module_isString(a) && extension_vega_util_module_has(extension_AGGREGATE_OP_INDEX, a);
}
const extension_COUNTING_OPS = new Set([
    'count',
    'valid',
    'missing',
    'distinct'
]);
function extension_isCountingAggregateOp(aggregate) {
    return extension_vega_util_module_isString(aggregate) && extension_COUNTING_OPS.has(aggregate);
}
function extension_isMinMaxOp(aggregate) {
    return extension_vega_util_module_isString(aggregate) && extension_util_contains(['min', 'max'], aggregate);
}
/** Additive-based aggregation operations. These can be applied to stack. */
const extension_SUM_OPS = new Set([
    'count',
    'sum',
    'distinct',
    'valid',
    'missing'
]);
/**
 * Aggregation operators that always produce values within the range [domainMin, domainMax].
 */
const extension_SHARED_DOMAIN_OPS = new Set([
    'mean',
    'average',
    'median',
    'q1',
    'q3',
    'min',
    'max'
]);
//# sourceMappingURL=aggregate.js.map
;// ../../node_modules/vega-lite/build/src/bin.js




/**
 * Create a key for the bin configuration. Not for prebinned bin.
 */
function extension_binToString(bin) {
    if (extension_vega_util_module_isBoolean(bin)) {
        bin = extension_normalizeBin(bin, undefined);
    }
    return ('bin' +
        extension_util_keys(bin)
            .map(p => (extension_isParameterExtent(bin[p]) ? extension_varName(`_${p}_${extension_util_entries(bin[p])}`) : extension_varName(`_${p}_${bin[p]}`)))
            .join(''));
}
/**
 * Vega-Lite should bin the data.
 */
function extension_isBinning(bin) {
    return bin === true || (extension_isBinParams(bin) && !bin.binned);
}
/**
 * The data is already binned and so Vega-Lite should not bin it again.
 */
function extension_isBinned(bin) {
    return bin === 'binned' || (extension_isBinParams(bin) && bin.binned === true);
}
function extension_isBinParams(bin) {
    return extension_vega_util_module_isObject(bin);
}
function extension_isParameterExtent(extent) {
    return extension_util_hasProperty(extent, 'param');
}
function extension_autoMaxBins(channel) {
    switch (channel) {
        case extension_ROW:
        case extension_COLUMN:
        case extension_channel_SIZE:
        case extension_COLOR:
        case extension_FILL:
        case extension_STROKE:
        case extension_STROKEWIDTH:
        case extension_OPACITY:
        case extension_FILLOPACITY:
        case extension_STROKEOPACITY:
        // Facets and Size shouldn't have too many bins
        // We choose 6 like shape to simplify the rule [falls through]
        case extension_SHAPE:
            return 6; // Vega's "shape" has 6 distinct values
        case extension_STROKEDASH:
            return 4; // We only provide 5 different stroke dash values (but 4 is more effective)
        default:
            return 10;
    }
}
//# sourceMappingURL=bin.js.map
;// ../../node_modules/vega-lite/build/src/expr.js


function extension_isExprRef(o) {
    return extension_util_hasProperty(o, 'expr');
}
function extension_replaceExprRef(index, { level } = { level: 0 }) {
    const props = extension_util_keys(index || {});
    const newIndex = {};
    for (const prop of props) {
        newIndex[prop] = level === 0 ? extension_signalRefOrValue(index[prop]) : extension_replaceExprRef(index[prop], { level: level - 1 });
    }
    return newIndex;
}
//# sourceMappingURL=expr.js.map
;// ../../node_modules/vega-lite/build/src/title.js


function extension_extractTitleConfig(titleConfig) {
    const { 
    // These are non-mark title config that need to be hardcoded
    anchor, frame, offset, orient, angle, limit, 
    // color needs to be redirect to fill
    color, 
    // subtitle properties
    subtitleColor, subtitleFont, subtitleFontSize, subtitleFontStyle, subtitleFontWeight, subtitleLineHeight, subtitlePadding, 
    // The rest are mark config.
    ...rest } = titleConfig;
    const titleMarkConfig = {
        ...rest,
        ...(color ? { fill: color } : {})
    };
    // These are non-mark title config that need to be hardcoded
    const nonMarkTitleProperties = {
        ...(anchor ? { anchor } : {}),
        ...(frame ? { frame } : {}),
        ...(offset ? { offset } : {}),
        ...(orient ? { orient } : {}),
        ...(angle !== undefined ? { angle } : {}),
        ...(limit !== undefined ? { limit } : {})
    };
    // subtitle part can stay in config.title since header titles do not use subtitle
    const subtitle = {
        ...(subtitleColor ? { subtitleColor } : {}),
        ...(subtitleFont ? { subtitleFont } : {}),
        ...(subtitleFontSize ? { subtitleFontSize } : {}),
        ...(subtitleFontStyle ? { subtitleFontStyle } : {}),
        ...(subtitleFontWeight ? { subtitleFontWeight } : {}),
        ...(subtitleLineHeight ? { subtitleLineHeight } : {}),
        ...(subtitlePadding ? { subtitlePadding } : {})
    };
    const subtitleMarkConfig = extension_util_pick(titleConfig, ['align', 'baseline', 'dx', 'dy', 'limit']);
    return { titleMarkConfig, subtitleMarkConfig, nonMarkTitleProperties, subtitle };
}
function extension_isText(v) {
    return extension_vega_util_module_isString(v) || (extension_vega_util_module_isArray(v) && extension_vega_util_module_isString(v[0]));
}
//# sourceMappingURL=title.js.map
;// ../../node_modules/vega-lite/build/src/vega.schema.js


function extension_isSignalRef(o) {
    return extension_util_hasProperty(o, 'signal');
}
function extension_isVgRangeStep(range) {
    return extension_util_hasProperty(range, 'step');
}
function extension_isDataRefUnionedDomain(domain) {
    if (!extension_vega_util_module_isArray(domain)) {
        return extension_util_hasProperty(domain, 'fields') && !extension_util_hasProperty(domain, 'data');
    }
    return false;
}
function extension_isFieldRefUnionDomain(domain) {
    if (!extension_vega_util_module_isArray(domain)) {
        return extension_util_hasProperty(domain, 'fields') && extension_util_hasProperty(domain, 'data');
    }
    return false;
}
function extension_isDataRefDomain(domain) {
    if (!extension_vega_util_module_isArray(domain)) {
        return extension_util_hasProperty(domain, 'field') && extension_util_hasProperty(domain, 'data');
    }
    return false;
}
const extension_VG_MARK_CONFIG_INDEX = {
    aria: 1,
    description: 1,
    ariaRole: 1,
    ariaRoleDescription: 1,
    blend: 1,
    opacity: 1,
    fill: 1,
    fillOpacity: 1,
    stroke: 1,
    strokeCap: 1,
    strokeWidth: 1,
    strokeOpacity: 1,
    strokeDash: 1,
    strokeDashOffset: 1,
    strokeJoin: 1,
    strokeOffset: 1,
    strokeMiterLimit: 1,
    startAngle: 1,
    endAngle: 1,
    padAngle: 1,
    innerRadius: 1,
    outerRadius: 1,
    size: 1,
    shape: 1,
    interpolate: 1,
    tension: 1,
    orient: 1,
    align: 1,
    baseline: 1,
    text: 1,
    dir: 1,
    dx: 1,
    dy: 1,
    ellipsis: 1,
    limit: 1,
    radius: 1,
    theta: 1,
    angle: 1,
    font: 1,
    fontSize: 1,
    fontWeight: 1,
    fontStyle: 1,
    lineBreak: 1,
    lineHeight: 1,
    cursor: 1,
    href: 1,
    tooltip: 1,
    cornerRadius: 1,
    cornerRadiusTopLeft: 1,
    cornerRadiusTopRight: 1,
    cornerRadiusBottomLeft: 1,
    cornerRadiusBottomRight: 1,
    aspect: 1,
    width: 1,
    height: 1,
    url: 1,
    smooth: 1
    // commented below are vg channel that do not have mark config.
    // x: 1,
    // y: 1,
    // x2: 1,
    // y2: 1,
    // xc'|'yc'
    // clip: 1,
    // path: 1,
    // url: 1,
};
const extension_VG_MARK_CONFIGS = extension_util_keys(extension_VG_MARK_CONFIG_INDEX);
const extension_VG_MARK_INDEX = {
    arc: 1,
    area: 1,
    group: 1,
    image: 1,
    line: 1,
    path: 1,
    rect: 1,
    rule: 1,
    shape: 1,
    symbol: 1,
    text: 1,
    trail: 1
};
// Vega's cornerRadius channels.
const extension_VG_CORNERRADIUS_CHANNELS = [
    'cornerRadius',
    'cornerRadiusTopLeft',
    'cornerRadiusTopRight',
    'cornerRadiusBottomLeft',
    'cornerRadiusBottomRight'
];
//# sourceMappingURL=vega.schema.js.map
;// ../../node_modules/vega-lite/build/src/compile/common.js






const extension_BIN_RANGE_DELIMITER = ' \u2013 ';
function extension_signalOrValueRefWithCondition(val) {
    const condition = extension_vega_util_module_isArray(val.condition)
        ? val.condition.map(extension_conditionalSignalRefOrValue)
        : extension_conditionalSignalRefOrValue(val.condition);
    return {
        ...extension_signalRefOrValue(val),
        condition
    };
}
function extension_signalRefOrValue(value) {
    if (extension_isExprRef(value)) {
        const { expr, ...rest } = value;
        return { signal: expr, ...rest };
    }
    return value;
}
function extension_conditionalSignalRefOrValue(value) {
    if (extension_isExprRef(value)) {
        const { expr, ...rest } = value;
        return { signal: expr, ...rest };
    }
    return value;
}
function extension_signalOrValueRef(value) {
    if (extension_isExprRef(value)) {
        const { expr, ...rest } = value;
        return { signal: expr, ...rest };
    }
    if (extension_isSignalRef(value)) {
        return value;
    }
    return value !== undefined ? { value } : undefined;
}
function extension_exprFromSignalRefOrValue(ref) {
    if (extension_isSignalRef(ref)) {
        return ref.signal;
    }
    return extension_$(ref);
}
function extension_exprFromValueRefOrSignalRef(ref) {
    if (extension_isSignalRef(ref)) {
        return ref.signal;
    }
    return extension_$(ref.value);
}
function extension_signalOrStringValue(v) {
    if (extension_isSignalRef(v)) {
        return v.signal;
    }
    return v == null ? null : extension_$(v);
}
function extension_applyMarkConfig(e, model, propsList) {
    for (const property of propsList) {
        const value = extension_getMarkConfig(property, model.markDef, model.config);
        if (value !== undefined) {
            e[property] = extension_signalOrValueRef(value);
        }
    }
    return e;
}
function extension_common_getStyles(mark) {
    return [].concat(mark.type, mark.style ?? []);
}
function extension_getMarkPropOrConfig(channel, mark, config, opt = {}) {
    const { vgChannel, ignoreVgConfig } = opt;
    if (vgChannel && extension_util_hasProperty(mark, vgChannel)) {
        return mark[vgChannel];
    }
    else if (mark[channel] !== undefined) {
        return mark[channel];
    }
    else if (ignoreVgConfig && (!vgChannel || vgChannel === channel)) {
        return undefined;
    }
    return extension_getMarkConfig(channel, mark, config, opt);
}
/**
 * Return property value from style or mark specific config property if exists.
 * Otherwise, return general mark specific config.
 */
function extension_getMarkConfig(channel, mark, config, { vgChannel } = {}) {
    const cfg = extension_getMarkStyleConfig(channel, mark, config.style);
    return extension_getFirstDefined(
    // style config has highest precedence
    vgChannel ? cfg : undefined, cfg, 
    // then mark-specific config
    vgChannel ? config[mark.type][vgChannel] : undefined, config[mark.type][channel], // Need to cast because MarkDef doesn't perfectly match with AnyMarkConfig, but if the type isn't available, we'll get nothing here, which is fine
    // If there is vgChannel, skip vl channel.
    // For example, vl size for text is vg fontSize, but config.mark.size is only for point size.
    vgChannel ? config.mark[vgChannel] : config.mark[channel] // Need to cast for the same reason as above
    );
}
function extension_getMarkStyleConfig(prop, mark, styleConfigIndex) {
    return extension_getStyleConfig(prop, extension_common_getStyles(mark), styleConfigIndex);
}
function extension_getStyleConfig(p, styles, styleConfigIndex) {
    styles = extension_vega_util_module_array(styles);
    let value;
    for (const style of styles) {
        const styleConfig = styleConfigIndex[style];
        if (extension_util_hasProperty(styleConfig, p)) {
            value = styleConfig[p];
        }
    }
    return value;
}
/**
 * Return Vega sort parameters (tuple of field and order).
 */
function extension_sortParams(orderDef, fieldRefOption) {
    return extension_vega_util_module_array(orderDef).reduce((s, orderChannelDef) => {
        s.field.push(extension_vgField(orderChannelDef, fieldRefOption));
        s.order.push(orderChannelDef.sort ?? 'ascending');
        return s;
    }, { field: [], order: [] });
}
function extension_mergeTitleFieldDefs(f1, f2) {
    const merged = [...f1];
    f2.forEach(fdToMerge => {
        for (const fieldDef1 of merged) {
            // If already exists, no need to append to merged array
            if (extension_util_deepEqual(fieldDef1, fdToMerge)) {
                return;
            }
        }
        merged.push(fdToMerge);
    });
    return merged;
}
function extension_mergeTitle(title1, title2) {
    if (extension_util_deepEqual(title1, title2) || !title2) {
        // if titles are the same or title2 is falsy
        return title1;
    }
    else if (!title1) {
        // if title1 is falsy
        return title2;
    }
    else {
        return [...extension_vega_util_module_array(title1), ...extension_vega_util_module_array(title2)].join(', ');
    }
}
function extension_mergeTitleComponent(v1, v2) {
    const v1Val = v1.value;
    const v2Val = v2.value;
    if (v1Val == null || v2Val === null) {
        return {
            explicit: v1.explicit,
            value: null
        };
    }
    else if ((extension_isText(v1Val) || extension_isSignalRef(v1Val)) && (extension_isText(v2Val) || extension_isSignalRef(v2Val))) {
        return {
            explicit: v1.explicit,
            value: extension_mergeTitle(v1Val, v2Val)
        };
    }
    else if (extension_isText(v1Val) || extension_isSignalRef(v1Val)) {
        return {
            explicit: v1.explicit,
            value: v1Val
        };
    }
    else if (extension_isText(v2Val) || extension_isSignalRef(v2Val)) {
        return {
            explicit: v1.explicit,
            value: v2Val
        };
    }
    else if (!extension_isText(v1Val) && !extension_isSignalRef(v1Val) && !extension_isText(v2Val) && !extension_isSignalRef(v2Val)) {
        return {
            explicit: v1.explicit,
            value: extension_mergeTitleFieldDefs(v1Val, v2Val)
        };
    }
    /* istanbul ignore next: Condition should not happen -- only for warning in development. */
    throw new Error('It should never reach here');
}
//# sourceMappingURL=common.js.map
;// ../../node_modules/vega-lite/build/src/log/message.js
/**
 * Collection of all Vega-Lite Error Messages
 */



function extension_invalidSpec(spec) {
    return `Invalid specification ${extension_util_stringify(spec)}. Make sure the specification includes at least one of the following properties: "mark", "layer", "facet", "hconcat", "vconcat", "concat", or "repeat".`;
}
// FIT
const extension_FIT_NON_SINGLE = 'Autosize "fit" only works for single views and layered views.';
function extension_containerSizeNonSingle(name) {
    const uName = name == 'width' ? 'Width' : 'Height';
    return `${uName} "container" only works for single views and layered views.`;
}
function extension_containerSizeNotCompatibleWithAutosize(name) {
    const uName = name == 'width' ? 'Width' : 'Height';
    const fitDirection = name == 'width' ? 'x' : 'y';
    return `${uName} "container" only works well with autosize "fit" or "fit-${fitDirection}".`;
}
function extension_droppingFit(channel) {
    return channel
        ? `Dropping "fit-${channel}" because spec has discrete ${extension_getSizeChannel(channel)}.`
        : `Dropping "fit" because spec has discrete size.`;
}
// VIEW SIZE
function extension_unknownField(channel) {
    return `Unknown field for ${channel}. Cannot calculate view size.`;
}
// SELECTION
function extension_cannotProjectOnChannelWithoutField(channel) {
    return `Cannot project a selection on encoding channel "${channel}", which has no field.`;
}
function extension_cannotProjectAggregate(channel, aggregate) {
    return `Cannot project a selection on encoding channel "${channel}" as it uses an aggregate function ("${aggregate}").`;
}
function extension_nearestNotSupportForContinuous(mark) {
    return `The "nearest" transform is not supported for ${mark} marks.`;
}
function extension_selectionNotSupported(mark) {
    return `Selection not supported for ${mark} yet.`;
}
function extension_selectionNotFound(name) {
    return `Cannot find a selection named "${name}".`;
}
const extension_SCALE_BINDINGS_CONTINUOUS = 'Scale bindings are currently only supported for scales with unbinned, continuous domains.';
const extension_SEQUENTIAL_SCALE_DEPRECATED = 'Sequntial scales are deprecated. The available quantitative scale type values are linear, log, pow, sqrt, symlog, time and utc';
const extension_LEGEND_BINDINGS_MUST_HAVE_PROJECTION = 'Legend bindings are only supported for selections over an individual field or encoding channel.';
function extension_cannotLookupVariableParameter(name) {
    return `Lookups can only be performed on selection parameters. "${name}" is a variable parameter.`;
}
function extension_noSameUnitLookup(name) {
    return (`Cannot define and lookup the "${name}" selection in the same view. ` +
        `Try moving the lookup into a second, layered view?`);
}
const extension_NEEDS_SAME_SELECTION = 'The same selection must be used to override scale domains in a layered view.';
const extension_INTERVAL_INITIALIZED_WITH_POS = 'Interval selections should be initialized using "x", "y", "longitude", or "latitude" keys.';
// REPEAT
function extension_noSuchRepeatedValue(field) {
    return `Unknown repeated value "${field}".`;
}
function extension_columnsNotSupportByRowCol(type) {
    return `The "columns" property cannot be used when "${type}" has nested row/column.`;
}
const extension_MULTIPLE_TIMER_ANIMATION_SELECTION = 'Multiple timer selections in one unit spec are not supported. Ignoring all but the first.';
const extension_MULTI_VIEW_ANIMATION_UNSUPPORTED = 'Animation involving facet, layer, or concat is currently unsupported.';
function extension_selectionAsScaleDomainWithoutField(field) {
    return ('A "field" or "encoding" must be specified when using a selection as a scale domain. ' +
        `Using "field": ${extension_$(field)}.`);
}
function extension_selectionAsScaleDomainWrongEncodings(encodings, encoding, extent, field) {
    return ((!encodings.length ? 'No ' : 'Multiple ') +
        `matching ${extension_$(encoding)} encoding found for selection ${extension_$(extent.param)}. ` +
        `Using "field": ${extension_$(field)}.`);
}
// CONCAT / REPEAT
const extension_CONCAT_CANNOT_SHARE_AXIS = 'Axes cannot be shared in concatenated or repeated views yet (https://github.com/vega/vega-lite/issues/2415).';
// DATA
function extension_unrecognizedParse(p) {
    return `Unrecognized parse "${p}".`;
}
function extension_differentParse(field, local, ancestor) {
    return `An ancestor parsed field "${field}" as ${ancestor} but a child wants to parse the field as ${local}.`;
}
const extension_ADD_SAME_CHILD_TWICE = 'Attempt to add the same child twice.';
// TRANSFORMS
function extension_invalidTransformIgnored(transform) {
    return `Ignoring an invalid transform: ${extension_util_stringify(transform)}.`;
}
const extension_NO_FIELDS_NEEDS_AS = 'If "from.fields" is not specified, "as" has to be a string that specifies the key to be used for the data from the secondary source.';
// ENCODING & FACET
function extension_customFormatTypeNotAllowed(channel) {
    return `Config.customFormatTypes is not true, thus custom format type and format for channel ${channel} are dropped.`;
}
function extension_projectionOverridden(opt) {
    const { parentProjection, projection } = opt;
    return `Layer's shared projection ${extension_util_stringify(parentProjection)} is overridden by a child projection ${extension_util_stringify(projection)}.`;
}
const extension_REPLACE_ANGLE_WITH_THETA = 'Arc marks uses theta channel rather than angle, replacing angle with theta.';
function extension_offsetNestedInsideContinuousPositionScaleDropped(mainChannel) {
    return `${mainChannel}Offset dropped because ${mainChannel} is continuous`;
}
function extension_primitiveChannelDef(channel, type, value) {
    return `Channel ${channel} is a ${type}. Converted to {value: ${extension_util_stringify(value)}}.`;
}
function extension_invalidFieldType(type) {
    return `Invalid field type "${type}".`;
}
function extension_invalidFieldTypeForCountAggregate(type, aggregate) {
    return `Invalid field type "${type}" for aggregate: "${aggregate}", using "quantitative" instead.`;
}
function extension_invalidAggregate(aggregate) {
    return `Invalid aggregation operator "${aggregate}".`;
}
function extension_missingFieldType(channel, newType) {
    return `Missing type for channel "${channel}", using "${newType}" instead.`;
}
function extension_droppingColor(type, opt) {
    const { fill, stroke } = opt;
    return `Dropping color ${type} as the plot also has ${fill && stroke ? 'fill and stroke' : fill ? 'fill' : 'stroke'}.`;
}
function extension_relativeBandSizeNotSupported(sizeChannel) {
    return `Position range does not support relative band size for ${sizeChannel}.`;
}
function extension_emptyFieldDef(fieldDef, channel) {
    return `Dropping ${extension_util_stringify(fieldDef)} from channel "${channel}" since it does not contain any data field, datum, value, or signal.`;
}
const extension_LINE_WITH_VARYING_SIZE = 'Line marks cannot encode size with a non-groupby field. You may want to use trail marks instead.';
function extension_incompatibleChannel(channel, markOrFacet, when) {
    return `${channel} dropped as it is incompatible with "${markOrFacet}"${when ? ` when ${when}` : ''}.`;
}
function extension_offsetEncodingScaleIgnored(channel) {
    return `${channel} encoding has no scale, so specified scale is ignored.`;
}
function extension_invalidEncodingChannel(channel) {
    return `${channel}-encoding is dropped as ${channel} is not a valid encoding channel.`;
}
function extension_channelShouldBeDiscrete(channel) {
    return `${channel} encoding should be discrete (ordinal / nominal / binned).`;
}
function extension_channelShouldBeDiscreteOrDiscretizing(channel) {
    return `${channel} encoding should be discrete (ordinal / nominal / binned) or use a discretizing scale (e.g. threshold).`;
}
function extension_facetChannelDropped(channels) {
    return `Facet encoding dropped as ${channels.join(' and ')} ${channels.length > 1 ? 'are' : 'is'} also specified.`;
}
function extension_discreteChannelCannotEncode(channel, type) {
    return `Using discrete channel "${channel}" to encode "${type}" field can be misleading as it does not encode ${type === 'ordinal' ? 'order' : 'magnitude'}.`;
}
// MARK
function extension_rangeMarkAlignmentCannotBeExpression(align) {
    return `The ${align} for range marks cannot be an expression`;
}
function extension_lineWithRange(hasX2, hasY2) {
    const channels = hasX2 && hasY2 ? 'x2 and y2' : hasX2 ? 'x2' : 'y2';
    return `Line mark is for continuous lines and thus cannot be used with ${channels}. We will use the rule mark (line segments) instead.`;
}
function extension_orientOverridden(original, actual) {
    return `Specified orient "${original}" overridden with "${actual}".`;
}
// SCALE
const extension_CANNOT_UNION_CUSTOM_DOMAIN_WITH_FIELD_DOMAIN = 'Custom domain scale cannot be unioned with default field-based domain.';
function extension_cannotUseScalePropertyWithNonColor(prop) {
    return `Cannot use the scale property "${prop}" with non-color channel.`;
}
function extension_cannotUseRelativeBandSizeWithNonBandScale(scaleType) {
    return `Cannot use the relative band size with ${scaleType} scale.`;
}
function extension_unaggregateDomainHasNoEffectForRawField(fieldDef) {
    return `Using unaggregated domain with raw field has no effect (${extension_util_stringify(fieldDef)}).`;
}
function extension_unaggregateDomainWithNonSharedDomainOp(aggregate) {
    return `Unaggregated domain not applicable for "${aggregate}" since it produces values outside the origin domain of the source data.`;
}
function extension_unaggregatedDomainWithLogScale(fieldDef) {
    return `Unaggregated domain is currently unsupported for log scale (${extension_util_stringify(fieldDef)}).`;
}
function extension_cannotApplySizeToNonOrientedMark(mark) {
    return `Cannot apply size to non-oriented mark "${mark}".`;
}
function extension_scaleTypeNotWorkWithChannel(channel, scaleType, defaultScaleType) {
    return `Channel "${channel}" does not work with "${scaleType}" scale. We are using "${defaultScaleType}" scale instead.`;
}
function extension_scaleTypeNotWorkWithFieldDef(scaleType, defaultScaleType) {
    return `FieldDef does not work with "${scaleType}" scale. We are using "${defaultScaleType}" scale instead.`;
}
function extension_scalePropertyNotWorkWithScaleType(scaleType, propName, channel) {
    return `${channel}-scale's "${propName}" is dropped as it does not work with ${scaleType} scale.`;
}
function extension_scaleTypeNotWorkWithMark(mark, scaleType) {
    return `Scale type "${scaleType}" does not work with mark "${mark}".`;
}
function extension_stepDropped(channel) {
    return `The step for "${channel}" is dropped because the ${channel === 'width' ? 'x' : 'y'} is continuous.`;
}
function extension_mergeConflictingProperty(property, propertyOf, v1, v2) {
    return `Conflicting ${propertyOf.toString()} property "${property.toString()}" (${extension_util_stringify(v1)} and ${extension_util_stringify(v2)}). Using ${extension_util_stringify(v1)}.`;
}
function extension_mergeConflictingDomainProperty(property, propertyOf, v1, v2) {
    return `Conflicting ${propertyOf.toString()} property "${property.toString()}" (${extension_util_stringify(v1)} and ${extension_util_stringify(v2)}). Using the union of the two domains.`;
}
function extension_independentScaleMeansIndependentGuide(channel) {
    return `Setting the scale to be independent for "${channel}" means we also have to set the guide (axis or legend) to be independent.`;
}
function extension_domainSortDropped(sort) {
    return `Dropping sort property ${extension_util_stringify(sort)} as unioned domains only support boolean or op "count", "min", and "max".`;
}
const extension_MORE_THAN_ONE_SORT = 'Domains that should be unioned has conflicting sort properties. Sort will be set to true.';
const extension_FACETED_INDEPENDENT_DIFFERENT_SOURCES = 'Detected faceted independent scales that union domain of multiple fields from different data sources. We will use the first field. The result view size may be incorrect.';
const extension_FACETED_INDEPENDENT_SAME_FIELDS_DIFFERENT_SOURCES = 'Detected faceted independent scales that union domain of the same fields from different source. We will assume that this is the same field from a different fork of the same data source. However, if this is not the case, the result view size may be incorrect.';
const extension_FACETED_INDEPENDENT_SAME_SOURCE = 'Detected faceted independent scales that union domain of multiple fields from the same data source. We will use the first field. The result view size may be incorrect.';
// AXIS
const extension_INVALID_CHANNEL_FOR_AXIS = 'Invalid channel for axis.';
// STACK
function extension_cannotStackRangedMark(channel) {
    return `Cannot stack "${channel}" if there is already "${channel}2".`;
}
function extension_stackNonLinearScale(scaleType) {
    return `Stack is applied to a non-linear scale (${scaleType}).`;
}
function extension_stackNonSummativeAggregate(aggregate) {
    return `Stacking is applied even though the aggregate function is non-summative ("${aggregate}").`;
}
// TIMEUNIT
function extension_invalidTimeUnit(unitName, value) {
    return `Invalid ${unitName}: ${extension_util_stringify(value)}.`;
}
function extension_droppedDay(d) {
    return `Dropping day from datetime ${extension_util_stringify(d)} as day cannot be combined with other units.`;
}
function extension_errorBarCenterAndExtentAreNotNeeded(center, extent) {
    return `${extent ? 'extent ' : ''}${extent && center ? 'and ' : ''}${center ? 'center ' : ''}${extent && center ? 'are ' : 'is '}not needed when data are aggregated.`;
}
function extension_errorBarCenterIsUsedWithWrongExtent(center, extent, mark) {
    return `${center} is not usually used with ${extent} for ${mark}.`;
}
function extension_errorBarContinuousAxisHasCustomizedAggregate(aggregate, compositeMark) {
    return `Continuous axis should not have customized aggregation function ${aggregate}; ${compositeMark} already agregates the axis.`;
}
function extension_errorBand1DNotSupport(property) {
    return `1D error band does not support ${property}.`;
}
// CHANNEL
function extension_channelRequiredForBinned(channel) {
    return `Channel ${channel} is required for "binned" bin.`;
}
function extension_channelShouldNotBeUsedForBinned(channel) {
    return `Channel ${channel} should not be used with "binned" bin.`;
}
function extension_domainRequiredForThresholdScale(channel) {
    return `Domain for ${channel} is required for threshold scale.`;
}
//# sourceMappingURL=message.js.map
;// ../../node_modules/vega-lite/build/src/log/index.js
/**
 * Vega-Lite's singleton logger utility.
 */
var extension_classPrivateFieldSet = (undefined && undefined.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
    if (kind === "m") throw new TypeError("Private method is not writable");
    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot write private member to an object whose class did not declare it");
    return (kind === "a" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;
};
var extension_classPrivateFieldGet = (undefined && undefined.__classPrivateFieldGet) || function (receiver, state, kind, f) {
    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
    return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
};
var extension_LocalLogger_level;


/**
 * Main (default) Vega Logger instance for Vega-Lite.
 */
const extension_main = extension_logger(extension_vega_util_module_Warn);
let extension_current = extension_main;
/**
 * Logger tool for checking if the code throws correct warning.
 */
class extension_LocalLogger {
    constructor() {
        this.warns = [];
        this.infos = [];
        this.debugs = [];
        extension_LocalLogger_level.set(this, Warn);
    }
    level(_) {
        if (_) {
            extension_classPrivateFieldSet(this, extension_LocalLogger_level, _, "f");
            return this;
        }
        return extension_classPrivateFieldGet(this, extension_LocalLogger_level, "f");
    }
    warn(...args) {
        if (extension_classPrivateFieldGet(this, extension_LocalLogger_level, "f") >= Warn)
            this.warns.push(...args);
        return this;
    }
    info(...args) {
        if (extension_classPrivateFieldGet(this, extension_LocalLogger_level, "f") >= Info)
            this.infos.push(...args);
        return this;
    }
    debug(...args) {
        if (extension_classPrivateFieldGet(this, extension_LocalLogger_level, "f") >= Debug)
            this.debugs.push(...args);
        return this;
    }
    error(...args) {
        if (extension_classPrivateFieldGet(this, extension_LocalLogger_level, "f") >= ErrorLevel)
            throw Error(...args);
        return this;
    }
}
extension_LocalLogger_level = new WeakMap();
function extension_log_wrap(f) {
    return () => {
        extension_current = new extension_LocalLogger();
        f(extension_current);
        extension_log_reset();
    };
}
/**
 * Set the singleton logger to be a custom logger.
 */
function extension_log_set(newLogger) {
    extension_current = newLogger;
    return extension_current;
}
/**
 * Reset the main logger to use the default Vega Logger.
 */
function extension_log_reset() {
    extension_current = extension_main;
    return extension_current;
}
function extension_log_error(...args) {
    extension_current.error(...args);
}
function extension_log_warn(...args) {
    extension_current.warn(...args);
}
function extension_log_info(...args) {
    extension_current.info(...args);
}
function extension_log_debug(...args) {
    extension_current.debug(...args);
}
//# sourceMappingURL=index.js.map
;// ../../node_modules/vega-lite/build/src/datetime.js
// DateTime definition object




function extension_isDateTime(o) {
    if (o && extension_vega_util_module_isObject(o)) {
        for (const part of extension_TIMEUNIT_PARTS) {
            if (extension_util_hasProperty(o, part)) {
                return true;
            }
        }
    }
    return false;
}
const extension_MONTHS = [
    'january',
    'february',
    'march',
    'april',
    'may',
    'june',
    'july',
    'august',
    'september',
    'october',
    'november',
    'december'
];
const extension_SHORT_MONTHS = extension_MONTHS.map(m => m.substr(0, 3));
const extension_DAYS = ['sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday'];
const extension_SHORT_DAYS = extension_DAYS.map(d => d.substr(0, 3));
function extension_normalizeQuarter(q) {
    if (extension_isNumeric(q)) {
        q = +q;
    }
    if (extension_vega_util_module_isNumber(q)) {
        if (q > 4) {
            extension_log_warn(extension_invalidTimeUnit('quarter', q));
        }
        // We accept 1-based quarter, so need to readjust to 0-based quarter
        return q - 1;
    }
    else {
        // Invalid quarter
        throw new Error(extension_invalidTimeUnit('quarter', q));
    }
}
function extension_normalizeMonth(m) {
    if (extension_isNumeric(m)) {
        m = +m;
    }
    if (extension_vega_util_module_isNumber(m)) {
        // We accept 1-based month, so need to readjust to 0-based month
        return m - 1;
    }
    else {
        const lowerM = m.toLowerCase();
        const monthIndex = extension_MONTHS.indexOf(lowerM);
        if (monthIndex !== -1) {
            return monthIndex; // 0 for january, ...
        }
        const shortM = lowerM.substr(0, 3);
        const shortMonthIndex = extension_SHORT_MONTHS.indexOf(shortM);
        if (shortMonthIndex !== -1) {
            return shortMonthIndex;
        }
        // Invalid month
        throw new Error(extension_invalidTimeUnit('month', m));
    }
}
function extension_normalizeDay(d) {
    if (extension_isNumeric(d)) {
        d = +d;
    }
    if (extension_vega_util_module_isNumber(d)) {
        // mod so that this can be both 0-based where 0 = sunday
        // and 1-based where 7=sunday
        return d % 7;
    }
    else {
        const lowerD = d.toLowerCase();
        const dayIndex = extension_DAYS.indexOf(lowerD);
        if (dayIndex !== -1) {
            return dayIndex; // 0 for january, ...
        }
        const shortD = lowerD.substr(0, 3);
        const shortDayIndex = extension_SHORT_DAYS.indexOf(shortD);
        if (shortDayIndex !== -1) {
            return shortDayIndex;
        }
        // Invalid day
        throw new Error(extension_invalidTimeUnit('day', d));
    }
}
/**
 * @param d the date.
 * @param normalize whether to normalize quarter, month, day. This should probably be true if d is a DateTime.
 * @returns array of date time parts [year, month, day, hours, minutes, seconds, milliseconds]
 */
function extension_dateTimeParts(d, normalize) {
    const parts = [];
    if (normalize && d.day !== undefined) {
        if (extension_util_keys(d).length > 1) {
            extension_log_warn(extension_droppedDay(d));
            d = extension_duplicate(d);
            delete d.day;
        }
    }
    if (d.year !== undefined) {
        parts.push(d.year);
    }
    else {
        // Just like Vega's timeunit transform, set default year to 2012, so domain conversion will be compatible with Vega
        // Note: 2012 is a leap year (and so the date February 29 is respected) that begins on a Sunday (and so days of the week will order properly at the beginning of the year).
        parts.push(2012);
    }
    if (d.month !== undefined) {
        const month = normalize ? extension_normalizeMonth(d.month) : d.month;
        parts.push(month);
    }
    else if (d.quarter !== undefined) {
        const quarter = normalize ? extension_normalizeQuarter(d.quarter) : d.quarter;
        parts.push(extension_vega_util_module_isNumber(quarter) ? quarter * 3 : `${quarter}*3`);
    }
    else {
        parts.push(0); // months start at zero in JS
    }
    if (d.date !== undefined) {
        parts.push(d.date);
    }
    else if (d.day !== undefined) {
        // HACK: Day only works as a standalone unit
        // This is only correct because we always set year to 2006 for day
        const day = normalize ? extension_normalizeDay(d.day) : d.day;
        parts.push(extension_vega_util_module_isNumber(day) ? day + 1 : `${day}+1`);
    }
    else {
        parts.push(1); // Date starts at 1 in JS
    }
    // Note: can't use TimeUnit enum here as importing it will create
    // circular dependency problem!
    for (const timeUnit of ['hours', 'minutes', 'seconds', 'milliseconds']) {
        const unit = d[timeUnit];
        parts.push(typeof unit === 'undefined' ? 0 : unit);
    }
    return parts;
}
/**
 * Return Vega expression for a date time.
 *
 * @param d the date time.
 * @returns the Vega expression.
 */
function extension_dateTimeToExpr(d) {
    const parts = extension_dateTimeParts(d, true);
    const string = parts.join(', ');
    if (d.utc) {
        return `utc(${string})`;
    }
    else {
        return `datetime(${string})`;
    }
}
/**
 * Return Vega expression for a date time expression.
 *
 * @param d the internal date time object with expression.
 * @returns the Vega expression.
 */
function extension_dateTimeExprToExpr(d) {
    const parts = extension_dateTimeParts(d, false);
    const string = parts.join(', ');
    if (d.utc) {
        return `utc(${string})`;
    }
    else {
        return `datetime(${string})`;
    }
}
/**
 * @param d the date time.
 * @returns the timestamp.
 */
function extension_dateTimeToTimestamp(d) {
    const parts = extension_dateTimeParts(d, true);
    if (d.utc) {
        return +new Date(Date.UTC(...parts));
    }
    else {
        return +new Date(...parts);
    }
}
//# sourceMappingURL=datetime.js.map
;// ../../node_modules/vega-lite/build/src/timeunit.js




/** Time Unit that only corresponds to only one part of Date objects. */
const extension_LOCAL_SINGLE_TIMEUNIT_INDEX = {
    year: 1,
    quarter: 1,
    month: 1,
    week: 1,
    day: 1,
    dayofyear: 1,
    date: 1,
    hours: 1,
    minutes: 1,
    seconds: 1,
    milliseconds: 1
};
const extension_TIMEUNIT_PARTS = extension_util_keys(extension_LOCAL_SINGLE_TIMEUNIT_INDEX);
function extension_isLocalSingleTimeUnit(timeUnit) {
    return extension_vega_util_module_has(extension_LOCAL_SINGLE_TIMEUNIT_INDEX, timeUnit);
}
const extension_UTC_SINGLE_TIMEUNIT_INDEX = {
    utcyear: 1,
    utcquarter: 1,
    utcmonth: 1,
    utcweek: 1,
    utcday: 1,
    utcdayofyear: 1,
    utcdate: 1,
    utchours: 1,
    utcminutes: 1,
    utcseconds: 1,
    utcmilliseconds: 1
};
const extension_LOCAL_MULTI_TIMEUNIT_INDEX = {
    yearquarter: 1,
    yearquartermonth: 1,
    yearmonth: 1,
    yearmonthdate: 1,
    yearmonthdatehours: 1,
    yearmonthdatehoursminutes: 1,
    yearmonthdatehoursminutesseconds: 1,
    yearweek: 1,
    yearweekday: 1,
    yearweekdayhours: 1,
    yearweekdayhoursminutes: 1,
    yearweekdayhoursminutesseconds: 1,
    yeardayofyear: 1,
    quartermonth: 1,
    monthdate: 1,
    monthdatehours: 1,
    monthdatehoursminutes: 1,
    monthdatehoursminutesseconds: 1,
    weekday: 1,
    weekdayhours: 1,
    weekdayhoursminutes: 1,
    weekdayhoursminutesseconds: 1,
    dayhours: 1,
    dayhoursminutes: 1,
    dayhoursminutesseconds: 1,
    hoursminutes: 1,
    hoursminutesseconds: 1,
    minutesseconds: 1,
    secondsmilliseconds: 1
};
const extension_BINNED_LOCAL_TIMEUNIT_INDEX = {
    binnedyear: 1,
    binnedyearquarter: 1,
    binnedyearquartermonth: 1,
    binnedyearmonth: 1,
    binnedyearmonthdate: 1,
    binnedyearmonthdatehours: 1,
    binnedyearmonthdatehoursminutes: 1,
    binnedyearmonthdatehoursminutesseconds: 1,
    binnedyearweek: 1,
    binnedyearweekday: 1,
    binnedyearweekdayhours: 1,
    binnedyearweekdayhoursminutes: 1,
    binnedyearweekdayhoursminutesseconds: 1,
    binnedyeardayofyear: 1
};
const extension_BINNED_UTC_TIMEUNIT_INDEX = {
    binnedutcyear: 1,
    binnedutcyearquarter: 1,
    binnedutcyearquartermonth: 1,
    binnedutcyearmonth: 1,
    binnedutcyearmonthdate: 1,
    binnedutcyearmonthdatehours: 1,
    binnedutcyearmonthdatehoursminutes: 1,
    binnedutcyearmonthdatehoursminutesseconds: 1,
    binnedutcyearweek: 1,
    binnedutcyearweekday: 1,
    binnedutcyearweekdayhours: 1,
    binnedutcyearweekdayhoursminutes: 1,
    binnedutcyearweekdayhoursminutesseconds: 1,
    binnedutcyeardayofyear: 1
};
const extension_BINNED_TIMEUNIT_INDEX = {
    ...extension_BINNED_LOCAL_TIMEUNIT_INDEX,
    ...extension_BINNED_UTC_TIMEUNIT_INDEX
};
function extension_isBinnedTimeUnit(timeUnit) {
    if (extension_vega_util_module_isObject(timeUnit)) {
        return timeUnit.binned;
    }
    return extension_isBinnedTimeUnitString(timeUnit);
}
function extension_isBinnedTimeUnitString(timeUnit) {
    return timeUnit && timeUnit.startsWith('binned');
}
const extension_UTC_MULTI_TIMEUNIT_INDEX = {
    utcyearquarter: 1,
    utcyearquartermonth: 1,
    utcyearmonth: 1,
    utcyearmonthdate: 1,
    utcyearmonthdatehours: 1,
    utcyearmonthdatehoursminutes: 1,
    utcyearmonthdatehoursminutesseconds: 1,
    utcyearweek: 1,
    utcyearweekday: 1,
    utcyearweekdayhours: 1,
    utcyearweekdayhoursminutes: 1,
    utcyearweekdayhoursminutesseconds: 1,
    utcyeardayofyear: 1,
    utcquartermonth: 1,
    utcmonthdate: 1,
    utcmonthdatehours: 1,
    utcmonthdatehoursminutes: 1,
    utcmonthdatehoursminutesseconds: 1,
    utcweekday: 1,
    utcweekdayhours: 1,
    utcweekdayhoursminutes: 1,
    utcweekdayhoursminutesseconds: 1,
    utcdayhours: 1,
    utcdayhoursminutes: 1,
    utcdayhoursminutesseconds: 1,
    utchoursminutes: 1,
    utchoursminutesseconds: 1,
    utcminutesseconds: 1,
    utcsecondsmilliseconds: 1
};
function extension_isUTCTimeUnit(t) {
    return t.startsWith('utc');
}
function extension_getLocalTimeUnitFromUTCTimeUnit(t) {
    return t.substring(3);
}
// In order of increasing specificity
const extension_VEGALITE_TIMEFORMAT = {
    'year-month': '%b %Y ',
    'year-month-date': '%b %d, %Y '
};
function extension_getTimeUnitParts(timeUnit) {
    return extension_TIMEUNIT_PARTS.filter(part => extension_containsTimeUnit(timeUnit, part));
}
function extension_getSmallestTimeUnitPart(timeUnit) {
    const parts = extension_getTimeUnitParts(timeUnit);
    return parts[parts.length - 1];
}
/** Returns true if fullTimeUnit contains the timeUnit, false otherwise. */
function extension_containsTimeUnit(fullTimeUnit, timeUnit) {
    const index = fullTimeUnit.indexOf(timeUnit);
    if (index < 0) {
        return false;
    }
    // exclude milliseconds
    if (index > 0 && timeUnit === 'seconds' && fullTimeUnit.charAt(index - 1) === 'i') {
        return false;
    }
    // exclude dayofyear
    if (fullTimeUnit.length > index + 3 && timeUnit === 'day' && fullTimeUnit.charAt(index + 3) === 'o') {
        return false;
    }
    if (index > 0 && timeUnit === 'year' && fullTimeUnit.charAt(index - 1) === 'f') {
        return false;
    }
    return true;
}
/**
 * Returns Vega expression for a given timeUnit and fieldRef
 */
function extension_timeunit_fieldExpr(fullTimeUnit, field, { end } = { end: false }) {
    const fieldRef = extension_accessPathWithDatum(field);
    const utc = extension_isUTCTimeUnit(fullTimeUnit) ? 'utc' : '';
    function func(timeUnit) {
        if (timeUnit === 'quarter') {
            // quarter starting at 0 (0,3,6,9).
            return `(${utc}quarter(${fieldRef})-1)`;
        }
        else {
            return `${utc}${timeUnit}(${fieldRef})`;
        }
    }
    let lastTimeUnit;
    const dateExpr = {};
    for (const part of extension_TIMEUNIT_PARTS) {
        if (extension_containsTimeUnit(fullTimeUnit, part)) {
            dateExpr[part] = func(part);
            lastTimeUnit = part;
        }
    }
    if (end) {
        dateExpr[lastTimeUnit] += '+1';
    }
    return extension_dateTimeExprToExpr(dateExpr);
}
function extension_timeUnitSpecifierExpression(timeUnit) {
    if (!timeUnit) {
        return undefined;
    }
    const timeUnitParts = extension_getTimeUnitParts(timeUnit);
    return `timeUnitSpecifier(${extension_util_stringify(timeUnitParts)}, ${extension_util_stringify(extension_VEGALITE_TIMEFORMAT)})`;
}
/**
 * Returns the signal expression used for axis labels for a time unit.
 */
function extension_formatExpression(timeUnit, field, isUTCScale) {
    if (!timeUnit) {
        return undefined;
    }
    const expr = extension_timeUnitSpecifierExpression(timeUnit);
    // We only use utcFormat for utc scale
    // For utc time units, the data is already converted as a part of timeUnit transform.
    // Thus, utc time units should use timeFormat to avoid shifting the time twice.
    const utc = isUTCScale || extension_isUTCTimeUnit(timeUnit);
    return `${utc ? 'utc' : 'time'}Format(${field}, ${expr})`;
}
function extension_normalizeTimeUnit(timeUnit) {
    if (!timeUnit) {
        return undefined;
    }
    let params;
    if (extension_vega_util_module_isString(timeUnit)) {
        if (extension_isBinnedTimeUnitString(timeUnit)) {
            params = {
                unit: timeUnit.substring(6),
                binned: true
            };
        }
        else {
            params = {
                unit: timeUnit
            };
        }
    }
    else if (extension_vega_util_module_isObject(timeUnit)) {
        params = {
            ...timeUnit,
            ...(timeUnit.unit ? { unit: timeUnit.unit } : {})
        };
    }
    if (extension_isUTCTimeUnit(params.unit)) {
        params.utc = true;
        params.unit = extension_getLocalTimeUnitFromUTCTimeUnit(params.unit);
    }
    return params;
}
function extension_timeUnitToString(tu) {
    const { utc, ...rest } = extension_normalizeTimeUnit(tu);
    if (rest.unit) {
        return ((utc ? 'utc' : '') +
            extension_util_keys(rest)
                .map(p => extension_varName(`${p === 'unit' ? '' : `_${p}_`}${rest[p]}`))
                .join(''));
    }
    else {
        // when maxbins is specified instead of units
        return ((utc ? 'utc' : '') +
            'timeunit' +
            extension_util_keys(rest)
                .map(p => extension_varName(`_${p}_${rest[p]}`))
                .join(''));
    }
}
function extension_durationExpr(timeUnit, wrap = x => x) {
    const normalizedTimeUnit = extension_normalizeTimeUnit(timeUnit);
    const smallestUnitPart = extension_getSmallestTimeUnitPart(normalizedTimeUnit.unit);
    if (smallestUnitPart && smallestUnitPart !== 'day') {
        const startDate = {
            year: 2001, // pick a non-leap year
            month: 1,
            date: 1,
            hours: 0,
            minutes: 0,
            seconds: 0,
            milliseconds: 0
        };
        const { step, part } = extension_getDateTimePartAndStep(smallestUnitPart, normalizedTimeUnit.step);
        const endDate = {
            ...startDate,
            [part]: +startDate[part] + step
        };
        // Calculate timestamp duration for the smallest unit listed
        return `${wrap(extension_dateTimeToExpr(endDate))} - ${wrap(extension_dateTimeToExpr(startDate))}`;
    }
    return undefined;
}
const extension_DATE_PARTS = {
    year: 1,
    month: 1,
    date: 1,
    hours: 1,
    minutes: 1,
    seconds: 1,
    milliseconds: 1
};
function extension_isDatePart(timeUnit) {
    return extension_vega_util_module_has(extension_DATE_PARTS, timeUnit);
}
function extension_getDateTimePartAndStep(timeUnit, step = 1) {
    if (extension_isDatePart(timeUnit)) {
        return { part: timeUnit, step };
    }
    switch (timeUnit) {
        case 'day':
        case 'dayofyear':
            return { part: 'date', step };
        case 'quarter':
            return { part: 'month', step: step * 3 };
        case 'week':
            return { part: 'date', step: step * 7 };
    }
}
//# sourceMappingURL=timeunit.js.map
;// ../../node_modules/vega-lite/build/src/predicate.js






function extension_isSelectionPredicate(predicate) {
    return extension_util_hasProperty(predicate, 'param');
}
function extension_isFieldEqualPredicate(predicate) {
    return !!predicate?.field && predicate.equal !== undefined;
}
function extension_isFieldLTPredicate(predicate) {
    return !!predicate?.field && predicate.lt !== undefined;
}
function extension_isFieldLTEPredicate(predicate) {
    return !!predicate?.field && predicate.lte !== undefined;
}
function extension_isFieldGTPredicate(predicate) {
    return !!predicate?.field && predicate.gt !== undefined;
}
function extension_isFieldGTEPredicate(predicate) {
    return !!predicate?.field && predicate.gte !== undefined;
}
function extension_isFieldRangePredicate(predicate) {
    if (predicate?.field) {
        if (extension_vega_util_module_isArray(predicate.range) && predicate.range.length === 2) {
            return true;
        }
        else if (extension_isSignalRef(predicate.range)) {
            return true;
        }
    }
    return false;
}
function extension_isFieldOneOfPredicate(predicate) {
    return (!!predicate?.field && (extension_vega_util_module_isArray(predicate.oneOf) || extension_vega_util_module_isArray(predicate.in)) // backward compatibility
    );
}
function extension_isFieldValidPredicate(predicate) {
    return !!predicate?.field && predicate.valid !== undefined;
}
function extension_isFieldPredicate(predicate) {
    return (extension_isFieldOneOfPredicate(predicate) ||
        extension_isFieldEqualPredicate(predicate) ||
        extension_isFieldRangePredicate(predicate) ||
        extension_isFieldLTPredicate(predicate) ||
        extension_isFieldGTPredicate(predicate) ||
        extension_isFieldLTEPredicate(predicate) ||
        extension_isFieldGTEPredicate(predicate));
}
function extension_predicateValueExpr(v, timeUnit) {
    return extension_valueExpr(v, { timeUnit, wrapTime: true });
}
function extension_predicateValuesExpr(vals, timeUnit) {
    return vals.map(v => extension_predicateValueExpr(v, timeUnit));
}
// This method is used by Voyager. Do not change its behavior without changing Voyager.
function extension_fieldFilterExpression(predicate, useInRange = true) {
    const { field } = predicate;
    const normalizedTimeUnit = extension_normalizeTimeUnit(predicate.timeUnit);
    const { unit, binned } = normalizedTimeUnit || {};
    const rawFieldExpr = extension_vgField(predicate, { expr: 'datum' });
    const fieldExpr = unit
        ? // For timeUnit, cast into integer with time() so we can use ===, inrange, indexOf to compare values directly.
            // TODO: We calculate timeUnit on the fly here. Consider if we would like to consolidate this with timeUnit pipeline
            // TODO: support utc
            `time(${!binned ? extension_timeunit_fieldExpr(unit, field) : rawFieldExpr})`
        : rawFieldExpr;
    if (extension_isFieldEqualPredicate(predicate)) {
        return `${fieldExpr}===${extension_predicateValueExpr(predicate.equal, unit)}`;
    }
    else if (extension_isFieldLTPredicate(predicate)) {
        const upper = predicate.lt;
        return `${fieldExpr}<${extension_predicateValueExpr(upper, unit)}`;
    }
    else if (extension_isFieldGTPredicate(predicate)) {
        const lower = predicate.gt;
        return `${fieldExpr}>${extension_predicateValueExpr(lower, unit)}`;
    }
    else if (extension_isFieldLTEPredicate(predicate)) {
        const upper = predicate.lte;
        return `${fieldExpr}<=${extension_predicateValueExpr(upper, unit)}`;
    }
    else if (extension_isFieldGTEPredicate(predicate)) {
        const lower = predicate.gte;
        return `${fieldExpr}>=${extension_predicateValueExpr(lower, unit)}`;
    }
    else if (extension_isFieldOneOfPredicate(predicate)) {
        return `indexof([${extension_predicateValuesExpr(predicate.oneOf, unit).join(',')}], ${fieldExpr}) !== -1`;
    }
    else if (extension_isFieldValidPredicate(predicate)) {
        return extension_fieldValidPredicate(fieldExpr, predicate.valid);
    }
    else if (extension_isFieldRangePredicate(predicate)) {
        const { range } = extension_replaceExprRef(predicate);
        const lower = extension_isSignalRef(range) ? { signal: `${range.signal}[0]` } : range[0];
        const upper = extension_isSignalRef(range) ? { signal: `${range.signal}[1]` } : range[1];
        if (lower !== null && upper !== null && useInRange) {
            return ('inrange(' + fieldExpr + ', [' + extension_predicateValueExpr(lower, unit) + ', ' + extension_predicateValueExpr(upper, unit) + '])');
        }
        const exprs = [];
        if (lower !== null) {
            exprs.push(`${fieldExpr} >= ${extension_predicateValueExpr(lower, unit)}`);
        }
        if (upper !== null) {
            exprs.push(`${fieldExpr} <= ${extension_predicateValueExpr(upper, unit)}`);
        }
        return exprs.length > 0 ? exprs.join(' && ') : 'true';
    }
    /* istanbul ignore next: it should never reach here */
    throw new Error(`Invalid field predicate: ${extension_util_stringify(predicate)}`);
}
function extension_fieldValidPredicate(fieldExpr, valid = true) {
    if (valid) {
        return `isValid(${fieldExpr}) && isFinite(+${fieldExpr})`;
    }
    else {
        return `!isValid(${fieldExpr}) || !isFinite(+${fieldExpr})`;
    }
}
function extension_normalizePredicate(f) {
    if (extension_isFieldPredicate(f) && f.timeUnit) {
        return {
            ...f,
            timeUnit: extension_normalizeTimeUnit(f.timeUnit)
        };
    }
    return f;
}
//# sourceMappingURL=predicate.js.map
;// ../../node_modules/vega-lite/build/src/type.js


/**
 * Data type based on level of measurement
 */
const extension_type_Type = {
    quantitative: 'quantitative',
    ordinal: 'ordinal',
    temporal: 'temporal',
    nominal: 'nominal',
    geojson: 'geojson'
};
function extension_isType(t) {
    return hasOwnProperty(extension_type_Type, t);
}
function extension_type_isContinuous(type) {
    return type === 'quantitative' || type === 'temporal';
}
function extension_type_isDiscrete(type) {
    return type === 'ordinal' || type === 'nominal';
}
const extension_QUANTITATIVE = extension_type_Type.quantitative;
const extension_ORDINAL = extension_type_Type.ordinal;
const extension_TEMPORAL = extension_type_Type.temporal;
const extension_NOMINAL = extension_type_Type.nominal;
const extension_GEOJSON = extension_type_Type.geojson;
const extension_TYPES = extension_util_keys(extension_type_Type);
/**
 * Get full, lowercase type name for a given type.
 * @param  type
 * @return Full type name.
 */
function extension_getFullName(type) {
    if (type) {
        type = type.toLowerCase();
        switch (type) {
            case 'q':
            case extension_QUANTITATIVE:
                return 'quantitative';
            case 't':
            case extension_TEMPORAL:
                return 'temporal';
            case 'o':
            case extension_ORDINAL:
                return 'ordinal';
            case 'n':
            case extension_NOMINAL:
                return 'nominal';
            case extension_GEOJSON:
                return 'geojson';
        }
    }
    // If we get invalid input, return undefined type.
    return undefined;
}
//# sourceMappingURL=type.js.map
;// ../../node_modules/vega-lite/build/src/scale.js






const extension_ScaleType = {
    // Continuous - Quantitative
    LINEAR: 'linear',
    LOG: 'log',
    POW: 'pow',
    SQRT: 'sqrt',
    SYMLOG: 'symlog',
    IDENTITY: 'identity',
    SEQUENTIAL: 'sequential',
    // Continuous - Time
    TIME: 'time',
    UTC: 'utc',
    // Discretizing scales
    QUANTILE: 'quantile',
    QUANTIZE: 'quantize',
    THRESHOLD: 'threshold',
    BIN_ORDINAL: 'bin-ordinal',
    // Discrete scales
    ORDINAL: 'ordinal',
    POINT: 'point',
    BAND: 'band'
};
/**
 * Index for scale categories -- only scale of the same categories can be merged together.
 * Current implementation is trying to be conservative and avoid merging scale type that might not work together
 */
const extension_SCALE_CATEGORY_INDEX = {
    linear: 'numeric',
    log: 'numeric',
    pow: 'numeric',
    sqrt: 'numeric',
    symlog: 'numeric',
    identity: 'numeric',
    sequential: 'numeric',
    time: 'time',
    utc: 'time',
    ordinal: 'ordinal',
    'bin-ordinal': 'bin-ordinal', // TODO: should bin-ordinal support merging with other
    point: 'ordinal-position',
    band: 'ordinal-position',
    quantile: 'discretizing',
    quantize: 'discretizing',
    threshold: 'discretizing'
};
const extension_SCALE_TYPES = extension_util_keys(extension_SCALE_CATEGORY_INDEX);
/**
 * Whether the two given scale types can be merged together.
 */
function extension_scaleCompatible(scaleType1, scaleType2) {
    const scaleCategory1 = extension_SCALE_CATEGORY_INDEX[scaleType1];
    const scaleCategory2 = extension_SCALE_CATEGORY_INDEX[scaleType2];
    return (scaleCategory1 === scaleCategory2 ||
        (scaleCategory1 === 'ordinal-position' && scaleCategory2 === 'time') ||
        (scaleCategory2 === 'ordinal-position' && scaleCategory1 === 'time'));
}
/**
 * Index for scale precedence -- high score = higher priority for merging.
 */
const extension_SCALE_PRECEDENCE_INDEX = {
    // numeric
    linear: 0,
    log: 1,
    pow: 1,
    sqrt: 1,
    symlog: 1,
    identity: 1,
    sequential: 1,
    // time
    time: 0,
    utc: 0,
    // ordinal-position -- these have higher precedence than continuous scales as they support more types of data
    point: 10,
    band: 11, // band has higher precedence as it is better for interaction
    // non grouped types
    ordinal: 0,
    'bin-ordinal': 0,
    quantile: 0,
    quantize: 0,
    threshold: 0
};
/**
 * Return scale categories -- only scale of the same categories can be merged together.
 */
function extension_scaleTypePrecedence(scaleType) {
    return extension_SCALE_PRECEDENCE_INDEX[scaleType];
}
const extension_QUANTITATIVE_SCALES = new Set([
    'linear',
    'log',
    'pow',
    'sqrt',
    'symlog'
]);
const extension_CONTINUOUS_TO_CONTINUOUS_SCALES = new Set([
    ...extension_QUANTITATIVE_SCALES,
    'time',
    'utc'
]);
function extension_isQuantitative(type) {
    return extension_QUANTITATIVE_SCALES.has(type);
}
const extension_CONTINUOUS_TO_DISCRETE_SCALES = new Set([
    'quantile',
    'quantize',
    'threshold'
]);
const extension_CONTINUOUS_DOMAIN_SCALES = new Set([
    ...extension_CONTINUOUS_TO_CONTINUOUS_SCALES,
    ...extension_CONTINUOUS_TO_DISCRETE_SCALES,
    'sequential',
    'identity'
]);
const extension_DISCRETE_DOMAIN_SCALES = new Set([
    'ordinal',
    'bin-ordinal',
    'point',
    'band'
]);
const extension_TIME_SCALE_TYPES = new Set(['time', 'utc']);
function extension_hasDiscreteDomain(type) {
    return extension_DISCRETE_DOMAIN_SCALES.has(type);
}
function extension_hasContinuousDomain(type) {
    return extension_CONTINUOUS_DOMAIN_SCALES.has(type);
}
function extension_isContinuousToContinuous(type) {
    return extension_CONTINUOUS_TO_CONTINUOUS_SCALES.has(type);
}
function extension_isContinuousToDiscrete(type) {
    return extension_CONTINUOUS_TO_DISCRETE_SCALES.has(type);
}
const extension_defaultScaleConfig = {
    pointPadding: 0.5,
    barBandPaddingInner: 0.1,
    rectBandPaddingInner: 0,
    tickBandPaddingInner: 0.25,
    bandWithNestedOffsetPaddingInner: 0.2,
    bandWithNestedOffsetPaddingOuter: 0.2,
    minBandSize: 2,
    minFontSize: 8,
    maxFontSize: 40,
    minOpacity: 0.3,
    maxOpacity: 0.8,
    // FIXME: revise if these *can* become ratios of width/height step
    minSize: 4, // Point size is area. For square point, 9 = 3 pixel ^ 2, not too small!
    minStrokeWidth: 1,
    maxStrokeWidth: 4,
    quantileCount: 4,
    quantizeCount: 4,
    zero: true,
    framesPerSecond: 2,
    animationDuration: 5
};
function extension_isExtendedScheme(scheme) {
    return !extension_vega_util_module_isString(scheme) && extension_util_hasProperty(scheme, 'name');
}
function extension_isParameterDomain(domain) {
    return extension_util_hasProperty(domain, 'param');
}
function extension_isDomainUnionWith(domain) {
    return extension_util_hasProperty(domain, 'unionWith');
}
function extension_isFieldRange(range) {
    return extension_vega_util_module_isObject(range) && 'field' in range;
}
const extension_SCALE_PROPERTY_INDEX = {
    type: 1,
    domain: 1,
    domainMax: 1,
    domainMin: 1,
    domainMid: 1,
    domainRaw: 1,
    align: 1,
    range: 1,
    rangeMax: 1,
    rangeMin: 1,
    scheme: 1,
    bins: 1,
    // Other properties
    reverse: 1,
    round: 1,
    // quantitative / time
    clamp: 1,
    nice: 1,
    // quantitative
    base: 1,
    exponent: 1,
    constant: 1,
    interpolate: 1,
    zero: 1, // zero depends on domain
    // band/point
    padding: 1,
    paddingInner: 1,
    paddingOuter: 1
};
const extension_SCALE_PROPERTIES = extension_util_keys(extension_SCALE_PROPERTY_INDEX);
const { type: extension_scale_type, domain: extension_scale_domain, range: extension_scale_range, rangeMax: extension_rangeMax, rangeMin: extension_rangeMin, scheme: extension_scale_scheme, ...extension_NON_TYPE_DOMAIN_RANGE_VEGA_SCALE_PROPERTY_INDEX } = extension_SCALE_PROPERTY_INDEX;
const extension_NON_TYPE_DOMAIN_RANGE_VEGA_SCALE_PROPERTIES = extension_util_keys(extension_NON_TYPE_DOMAIN_RANGE_VEGA_SCALE_PROPERTY_INDEX);
function extension_scaleTypeSupportProperty(scaleType, propName) {
    switch (propName) {
        case 'type':
        case 'domain':
        case 'reverse':
        case 'range':
            return true;
        case 'scheme':
        case 'interpolate':
            return !['point', 'band', 'identity'].includes(scaleType);
        case 'bins':
            return !['point', 'band', 'identity', 'ordinal'].includes(scaleType);
        case 'round':
            return extension_isContinuousToContinuous(scaleType) || scaleType === 'band' || scaleType === 'point';
        case 'padding':
        case 'rangeMin':
        case 'rangeMax':
            return extension_isContinuousToContinuous(scaleType) || ['point', 'band'].includes(scaleType);
        case 'paddingOuter':
        case 'align':
            return ['point', 'band'].includes(scaleType);
        case 'paddingInner':
            return scaleType === 'band';
        case 'domainMax':
        case 'domainMid':
        case 'domainMin':
        case 'domainRaw':
        case 'clamp':
            return extension_isContinuousToContinuous(scaleType);
        case 'nice':
            return extension_isContinuousToContinuous(scaleType) || scaleType === 'quantize' || scaleType === 'threshold';
        case 'exponent':
            return scaleType === 'pow';
        case 'base':
            return scaleType === 'log';
        case 'constant':
            return scaleType === 'symlog';
        case 'zero':
            return (extension_hasContinuousDomain(scaleType) &&
                !extension_util_contains([
                    'log', // log scale cannot have zero value
                    'time',
                    'utc', // zero is not meaningful for time
                    'threshold', // threshold requires custom domain so zero does not matter
                    'quantile' // quantile depends on distribution so zero does not matter
                ], scaleType));
    }
}
/**
 * Returns undefined if the input channel supports the input scale property name
 */
function extension_channelScalePropertyIncompatability(channel, propName) {
    switch (propName) {
        case 'interpolate':
        case 'scheme':
        case 'domainMid':
            if (!extension_isColorChannel(channel)) {
                return extension_cannotUseScalePropertyWithNonColor(propName);
            }
            return undefined;
        case 'align':
        case 'type':
        case 'bins':
        case 'domain':
        case 'domainMax':
        case 'domainMin':
        case 'domainRaw':
        case 'range':
        case 'base':
        case 'exponent':
        case 'constant':
        case 'nice':
        case 'padding':
        case 'paddingInner':
        case 'paddingOuter':
        case 'rangeMax':
        case 'rangeMin':
        case 'reverse':
        case 'round':
        case 'clamp':
        case 'zero':
            return undefined; // GOOD!
    }
}
function extension_scaleTypeSupportDataType(specifiedType, fieldDefType) {
    if (extension_util_contains([extension_ORDINAL, extension_NOMINAL], fieldDefType)) {
        return specifiedType === undefined || extension_hasDiscreteDomain(specifiedType);
    }
    else if (fieldDefType === extension_TEMPORAL) {
        return extension_util_contains([extension_ScaleType.TIME, extension_ScaleType.UTC, undefined], specifiedType);
    }
    else if (fieldDefType === extension_QUANTITATIVE) {
        return extension_isQuantitative(specifiedType) || extension_isContinuousToDiscrete(specifiedType) || specifiedType === undefined;
    }
    return true;
}
function extension_channelSupportScaleType(channel, scaleType, hasNestedOffsetScale = false) {
    if (!extension_isScaleChannel(channel)) {
        return false;
    }
    switch (channel) {
        case extension_channel_X:
        case extension_channel_Y:
        case extension_XOFFSET:
        case extension_YOFFSET:
        case extension_THETA:
        case extension_RADIUS:
            if (extension_isContinuousToContinuous(scaleType)) {
                return true;
            }
            else if (scaleType === 'band') {
                return true;
            }
            else if (scaleType === 'point') {
                /*
                  Point scale can't be use if the position has a nested offset scale
                  because if there is a nested scale, then it's band.
                */
                return !hasNestedOffsetScale;
            }
            return false;
        case extension_TIME:
            return extension_util_contains(['linear', 'band'], scaleType);
        case extension_channel_SIZE: // TODO: size and opacity can support ordinal with more modification
        case extension_STROKEWIDTH:
        case extension_OPACITY:
        case extension_FILLOPACITY:
        case extension_STROKEOPACITY:
        case extension_ANGLE:
            // Although it generally doesn't make sense to use band with size and opacity,
            // it can also work since we use band: 0.5 to get midpoint.
            return (extension_isContinuousToContinuous(scaleType) ||
                extension_isContinuousToDiscrete(scaleType) ||
                extension_util_contains(['band', 'point', 'ordinal'], scaleType));
        case extension_COLOR:
        case extension_FILL:
        case extension_STROKE:
            return scaleType !== 'band'; // band does not make sense with color
        case extension_STROKEDASH:
        case extension_SHAPE:
            return scaleType === 'ordinal' || extension_isContinuousToDiscrete(scaleType);
    }
}
//# sourceMappingURL=scale.js.map
;// ../../node_modules/vega-lite/build/src/invalid.js

function extension_isScaleInvalidDataIncludeAsValue(invalidDataMode) {
    return extension_vega_util_module_isObject(invalidDataMode) && 'value' in invalidDataMode;
}
//# sourceMappingURL=invalid.js.map
;// ../../node_modules/vega-lite/build/src/mark.js


/**
 * All types of primitive marks.
 */
const extension_mark_Mark = {
    arc: 'arc',
    area: 'area',
    bar: 'bar',
    image: 'image',
    line: 'line',
    point: 'point',
    rect: 'rect',
    rule: 'rule',
    text: 'text',
    tick: 'tick',
    trail: 'trail',
    circle: 'circle',
    square: 'square',
    geoshape: 'geoshape'
};
const extension_ARC = extension_mark_Mark.arc;
const extension_AREA = extension_mark_Mark.area;
const extension_BAR = extension_mark_Mark.bar;
const extension_IMAGE = extension_mark_Mark.image;
const extension_LINE = extension_mark_Mark.line;
const extension_POINT = extension_mark_Mark.point;
const extension_RECT = extension_mark_Mark.rect;
const extension_RULE = extension_mark_Mark.rule;
const extension_mark_TEXT = extension_mark_Mark.text;
const extension_TICK = extension_mark_Mark.tick;
const extension_TRAIL = extension_mark_Mark.trail;
const extension_CIRCLE = extension_mark_Mark.circle;
const extension_SQUARE = extension_mark_Mark.square;
const extension_GEOSHAPE = extension_mark_Mark.geoshape;
function extension_isMark(m) {
    return hasOwnProperty(extension_mark_Mark, m);
}
const extension_PATH_MARKS = (/* unused pure expression or super */ null && (['line', 'area', 'trail']));
function extension_isPathMark(m) {
    return ['line', 'area', 'trail'].includes(m);
}
function extension_isRectBasedMark(m) {
    return ['rect', 'bar', 'image', 'arc', 'tick' /* arc is rect/interval in polar coordinate */].includes(m);
}
const extension_PRIMITIVE_MARKS = new Set(extension_util_keys(extension_mark_Mark));
function extension_isMarkDef(mark) {
    return extension_util_hasProperty(mark, 'type');
}
function extension_isPrimitiveMark(mark) {
    const markType = extension_isMarkDef(mark) ? mark.type : mark;
    return extension_PRIMITIVE_MARKS.has(markType);
}
const extension_STROKE_CONFIG = [
    'stroke',
    'strokeWidth',
    'strokeDash',
    'strokeDashOffset',
    'strokeOpacity',
    'strokeJoin',
    'strokeMiterLimit'
];
const extension_FILL_CONFIG = ['fill', 'fillOpacity'];
const extension_FILL_STROKE_CONFIG = [...extension_STROKE_CONFIG, ...extension_FILL_CONFIG];
const extension_VL_ONLY_MARK_CONFIG_INDEX = {
    color: 1,
    filled: 1,
    invalid: 1,
    order: 1,
    radius2: 1,
    theta2: 1,
    timeUnitBandSize: 1,
    timeUnitBandPosition: 1
};
const extension_VL_ONLY_MARK_CONFIG_PROPERTIES = extension_util_keys(extension_VL_ONLY_MARK_CONFIG_INDEX);
const extension_VL_ONLY_RECT_CONFIG = [
    'binSpacing',
    'continuousBandSize',
    'discreteBandSize',
    'minBandSize'
];
const extension_VL_ONLY_MARK_SPECIFIC_CONFIG_PROPERTY_INDEX = {
    area: ['line', 'point'],
    bar: extension_VL_ONLY_RECT_CONFIG,
    rect: extension_VL_ONLY_RECT_CONFIG,
    line: ['point'],
    tick: ['bandSize', 'thickness', ...extension_VL_ONLY_RECT_CONFIG]
};
const extension_defaultMarkConfig = {
    color: '#4c78a8',
    invalid: 'break-paths-show-path-domains',
    timeUnitBandSize: 1
};
const extension_MARK_CONFIG_INDEX = {
    mark: 1,
    arc: 1,
    area: 1,
    bar: 1,
    circle: 1,
    image: 1,
    line: 1,
    point: 1,
    rect: 1,
    rule: 1,
    square: 1,
    text: 1,
    tick: 1,
    trail: 1,
    geoshape: 1
};
const extension_MARK_CONFIGS = extension_util_keys(extension_MARK_CONFIG_INDEX);
function extension_isRelativeBandSize(o) {
    return extension_util_hasProperty(o, 'band');
}
const extension_BAR_CORNER_RADIUS_INDEX = {
    horizontal: ['cornerRadiusTopRight', 'cornerRadiusBottomRight'],
    vertical: ['cornerRadiusTopLeft', 'cornerRadiusTopRight']
};
const extension_DEFAULT_RECT_BAND_SIZE = 5;
const extension_defaultRectConfig = {
    binSpacing: 0,
    continuousBandSize: extension_DEFAULT_RECT_BAND_SIZE,
    minBandSize: 0.25,
    timeUnitBandPosition: 0.5
};
const extension_defaultBarConfig = {
    ...extension_defaultRectConfig,
    binSpacing: 1
};
const extension_defaultTickConfig = {
    ...extension_defaultRectConfig,
    thickness: 1
};
function extension_getMarkType(m) {
    return extension_isMarkDef(m) ? m.type : m;
}
//# sourceMappingURL=mark.js.map
;// ../../node_modules/vega-lite/build/src/compile/invalid/normalizeInvalidDataMode.js
function extension_normalizeInvalidDataMode(mode, { isPath }) {
    if (mode === undefined || mode === 'break-paths-show-path-domains') {
        return isPath ? 'break-paths-show-domains' : 'filter';
    }
    else if (mode === null) {
        return 'show';
    }
    return mode;
}
//# sourceMappingURL=normalizeInvalidDataMode.js.map
;// ../../node_modules/vega-lite/build/src/compile/invalid/ScaleInvalidDataMode.js




function extension_getScaleInvalidDataMode({ markDef, config, scaleChannel, scaleType, isCountAggregate }) {
    if (!scaleType || !extension_hasContinuousDomain(scaleType) || isCountAggregate) {
        // - Discrete scales can always display null as another category
        // - Count cannot output null values
        return 'always-valid';
    }
    const invalidMode = extension_normalizeInvalidDataMode(extension_getMarkPropOrConfig('invalid', markDef, config), {
        isPath: extension_isPathMark(markDef.type)
    });
    const scaleOutputForInvalid = config.scale?.invalid?.[scaleChannel];
    if (scaleOutputForInvalid !== undefined) {
        // Regardless of the current invalid mode, if the channel has a default value, we consider the field valid.
        return 'show';
    }
    return invalidMode;
}
function extension_shouldBreakPath(mode) {
    return mode === 'break-paths-filter-domains' || mode === 'break-paths-show-domains';
}
//# sourceMappingURL=ScaleInvalidDataMode.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/scaledZeroOrMinOrMax.js
function extension_scaledZeroOrMinOrMax({ scaleName, scale, mode }) {
    const domain = `domain('${scaleName}')`;
    if (!scale || !scaleName) {
        return undefined;
    }
    const min = `${domain}[0]`;
    const max = `peek(${domain})`; // peek = the last item of the array
    // If there is a scale (and hence its name)
    const domainHasZero = scale.domainHasZero();
    // zeroOrMin or zeroOrMax mode
    if (domainHasZero === 'definitely') {
        return {
            scale: scaleName,
            value: 0
        };
    }
    else if (domainHasZero === 'maybe') {
        const nonZeroValue = mode === 'zeroOrMin' ? min : max;
        return { signal: `scale('${scaleName}', inrange(0, ${domain}) ? 0 : ${nonZeroValue})` };
    }
    else {
        // domainHasZero === 'definitely-not'
        return { signal: `scale('${scaleName}', ${mode === 'zeroOrMin' ? min : max})` };
    }
}
//# sourceMappingURL=scaledZeroOrMinOrMax.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/invalid.js







function extension_getConditionalValueRefForIncludingInvalidValue({ scaleChannel, channelDef, scale, scaleName, markDef, config }) {
    const scaleType = scale?.get('type');
    const fieldDef = extension_getFieldDef(channelDef);
    const isCountAggregate = extension_isCountingAggregateOp(fieldDef?.aggregate);
    const invalidDataMode = extension_getScaleInvalidDataMode({
        scaleChannel,
        markDef,
        config,
        scaleType,
        isCountAggregate
    });
    if (fieldDef && invalidDataMode === 'show') {
        const includeAs = config.scale.invalid?.[scaleChannel] ?? 'zero-or-min';
        return {
            test: extension_fieldValidPredicate(extension_vgField(fieldDef, { expr: 'datum' }), false),
            ...extension_refForInvalidValues(includeAs, scale, scaleName)
        };
    }
    return undefined;
}
function extension_refForInvalidValues(includeAs, scale, scaleName) {
    if (extension_isScaleInvalidDataIncludeAsValue(includeAs)) {
        const { value } = includeAs;
        return extension_isSignalRef(value) ? { signal: value.signal } : { value };
    }
    return extension_scaledZeroOrMinOrMax({
        scale,
        scaleName,
        mode: 'zeroOrMin'
    });
}
//# sourceMappingURL=invalid.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/valueref.js













function extension_midPointRefWithPositionInvalidTest(params) {
    const { channel, channelDef, markDef, scale, scaleName, config } = params;
    const scaleChannel = extension_getMainRangeChannel(channel);
    const mainRef = extension_midPoint(params);
    const valueRefForIncludingInvalid = extension_getConditionalValueRefForIncludingInvalidValue({
        scaleChannel,
        channelDef,
        scale,
        scaleName,
        markDef,
        config
    });
    return valueRefForIncludingInvalid !== undefined ? [valueRefForIncludingInvalid, mainRef] : mainRef;
}
function extension_datumDefToExpr(datumDef) {
    const { datum } = datumDef;
    if (extension_isDateTime(datum)) {
        return extension_dateTimeToExpr(datum);
    }
    return `${extension_util_stringify(datum)}`;
}
function extension_valueRefForFieldOrDatumDef(fieldDef, scaleName, opt, encode) {
    const ref = {};
    if (scaleName) {
        ref.scale = scaleName;
    }
    if (extension_isDatumDef(fieldDef)) {
        const { datum } = fieldDef;
        if (extension_isDateTime(datum)) {
            ref.signal = extension_dateTimeToExpr(datum);
        }
        else if (extension_isSignalRef(datum)) {
            ref.signal = datum.signal;
        }
        else if (extension_isExprRef(datum)) {
            ref.signal = datum.expr;
        }
        else {
            ref.value = datum;
        }
    }
    else {
        ref.field = extension_vgField(fieldDef, opt);
    }
    if (encode) {
        const { offset, band } = encode;
        if (offset) {
            ref.offset = offset;
        }
        if (band) {
            ref.band = band;
        }
    }
    return ref;
}
/**
 * Signal that returns the middle of a bin from start and end field. Should only be used with x and y.
 */
function extension_interpolatedSignalRef({ scaleName, fieldOrDatumDef, fieldOrDatumDef2, offset, startSuffix, endSuffix = 'end', bandPosition = 0.5 }) {
    const expr = !extension_isSignalRef(bandPosition) && 0 < bandPosition && bandPosition < 1 ? 'datum' : undefined;
    const start = extension_vgField(fieldOrDatumDef, { expr, suffix: startSuffix });
    const end = fieldOrDatumDef2 !== undefined
        ? extension_vgField(fieldOrDatumDef2, { expr })
        : extension_vgField(fieldOrDatumDef, { suffix: endSuffix, expr });
    const ref = {};
    if (bandPosition === 0 || bandPosition === 1) {
        ref.scale = scaleName;
        const field = bandPosition === 0 ? start : end;
        ref.field = field;
    }
    else {
        const datum = extension_isSignalRef(bandPosition)
            ? `(1-${bandPosition.signal}) * ${start} + ${bandPosition.signal} * ${end}`
            : `${1 - bandPosition} * ${start} + ${bandPosition} * ${end}`;
        ref.signal = `scale("${scaleName}", ${datum})`;
    }
    if (offset) {
        ref.offset = offset;
    }
    return ref;
}
function extension_binSizeExpr({ scaleName, fieldDef }) {
    const start = extension_vgField(fieldDef, { expr: 'datum' });
    const end = extension_vgField(fieldDef, { expr: 'datum', suffix: 'end' });
    return `abs(scale("${scaleName}", ${end}) - scale("${scaleName}", ${start}))`;
}
/**
 * @returns {VgValueRef} Value Ref for xc / yc or mid point for other channels.
 */
function extension_midPoint({ channel, channelDef, channel2Def, markDef, config, scaleName, scale, stack, offset, defaultRef, bandPosition }) {
    // TODO: datum support
    if (channelDef) {
        /* istanbul ignore else */
        if (extension_isFieldOrDatumDef(channelDef)) {
            const scaleType = scale?.get('type');
            if (extension_isTypedFieldDef(channelDef)) {
                bandPosition ?? (bandPosition = extension_getBandPosition({
                    fieldDef: channelDef,
                    fieldDef2: channel2Def,
                    markDef,
                    config
                }));
                const { bin, timeUnit, type } = channelDef;
                if (extension_isBinning(bin) || (bandPosition && timeUnit && type === extension_TEMPORAL)) {
                    // Use middle only for x an y to place marks in the center between start and end of the bin range.
                    // We do not use the mid point for other channels (e.g. size) so that properties of legends and marks match.
                    if (stack?.impute) {
                        // For stack, we computed bin_mid so we can impute.
                        return extension_valueRefForFieldOrDatumDef(channelDef, scaleName, { binSuffix: 'mid' }, { offset });
                    }
                    if (bandPosition && !extension_hasDiscreteDomain(scaleType)) {
                        // if band = 0, no need to call interpolation
                        // For non-stack, we can just calculate bin mid on the fly using signal.
                        return extension_interpolatedSignalRef({ scaleName, fieldOrDatumDef: channelDef, bandPosition, offset });
                    }
                    return extension_valueRefForFieldOrDatumDef(channelDef, scaleName, extension_binRequiresRange(channelDef, channel) ? { binSuffix: 'range' } : {}, {
                        offset
                    });
                }
                else if (extension_isBinned(bin)) {
                    if (extension_isFieldDef(channel2Def)) {
                        return extension_interpolatedSignalRef({
                            scaleName,
                            fieldOrDatumDef: channelDef,
                            fieldOrDatumDef2: channel2Def,
                            bandPosition,
                            offset
                        });
                    }
                    else {
                        const channel2 = channel === extension_channel_X ? extension_channel_X2 : extension_channel_Y2;
                        extension_log_warn(extension_channelRequiredForBinned(channel2));
                    }
                }
            }
            return extension_valueRefForFieldOrDatumDef(channelDef, scaleName, extension_hasDiscreteDomain(scaleType) ? { binSuffix: 'range' } : {}, // no need for bin suffix if there is no scale
            {
                offset,
                // For band, to get mid point, need to offset by half of the band
                band: scaleType === 'band' ? (bandPosition ?? channelDef.bandPosition ?? 0.5) : undefined
            });
        }
        else if (extension_isValueDef(channelDef)) {
            const value = channelDef.value;
            const offsetMixins = offset ? { offset } : {};
            return { ...extension_widthHeightValueOrSignalRef(channel, value), ...offsetMixins };
        }
        // If channelDef is neither field def or value def, it's a condition-only def.
        // In such case, we will use default ref.
    }
    if (extension_vega_util_module_isFunction(defaultRef)) {
        defaultRef = defaultRef();
    }
    if (defaultRef) {
        // for non-position, ref could be undefined.
        return {
            ...defaultRef,
            // only include offset when it is non-zero (zero = no offset)
            ...(offset ? { offset } : {})
        };
    }
    return defaultRef;
}
/**
 * Convert special "width" and "height" values in Vega-Lite into Vega value ref.
 */
function extension_widthHeightValueOrSignalRef(channel, value) {
    if (extension_util_contains(['x', 'x2'], channel) && value === 'width') {
        return { field: { group: 'width' } };
    }
    else if (extension_util_contains(['y', 'y2'], channel) && value === 'height') {
        return { field: { group: 'height' } };
    }
    return extension_signalOrValueRef(value);
}
//# sourceMappingURL=valueref.js.map
;// ../../node_modules/vega-lite/build/src/compile/format.js










function extension_isCustomFormatType(formatType) {
    return formatType && formatType !== 'number' && formatType !== 'time';
}
function extension_customFormatExpr(formatType, field, format) {
    return `${formatType}(${field}${format ? `, ${extension_util_stringify(format)}` : ''})`;
}
const extension_format_BIN_RANGE_DELIMITER = ' \u2013 ';
function extension_formatSignalRef({ fieldOrDatumDef, format, formatType, expr, normalizeStack, config }) {
    if (extension_isCustomFormatType(formatType)) {
        return extension_formatCustomType({
            fieldOrDatumDef,
            format,
            formatType,
            expr,
            config
        });
    }
    const field = extension_fieldToFormat(fieldOrDatumDef, expr, normalizeStack);
    const type = extension_channelDefType(fieldOrDatumDef);
    if (format === undefined && formatType === undefined && config.customFormatTypes) {
        if (type === 'quantitative') {
            if (normalizeStack && config.normalizedNumberFormatType)
                return extension_formatCustomType({
                    fieldOrDatumDef,
                    format: config.normalizedNumberFormat,
                    formatType: config.normalizedNumberFormatType,
                    expr,
                    config
                });
            if (config.numberFormatType) {
                return extension_formatCustomType({
                    fieldOrDatumDef,
                    format: config.numberFormat,
                    formatType: config.numberFormatType,
                    expr,
                    config
                });
            }
        }
        if (type === 'temporal' &&
            config.timeFormatType &&
            extension_isFieldDef(fieldOrDatumDef) &&
            fieldOrDatumDef.timeUnit === undefined) {
            return extension_formatCustomType({
                fieldOrDatumDef,
                format: config.timeFormat,
                formatType: config.timeFormatType,
                expr,
                config
            });
        }
    }
    if (extension_isFieldOrDatumDefForTimeFormat(fieldOrDatumDef)) {
        const signal = extension_timeFormatExpression({
            field,
            timeUnit: extension_isFieldDef(fieldOrDatumDef) ? extension_normalizeTimeUnit(fieldOrDatumDef.timeUnit)?.unit : undefined,
            format,
            formatType: config.timeFormatType,
            rawTimeFormat: config.timeFormat,
            isUTCScale: extension_isScaleFieldDef(fieldOrDatumDef) && fieldOrDatumDef.scale?.type === extension_ScaleType.UTC
        });
        return signal ? { signal } : undefined;
    }
    format = extension_numberFormat({ type, specifiedFormat: format, config, normalizeStack });
    if (extension_isFieldDef(fieldOrDatumDef) && extension_isBinning(fieldOrDatumDef.bin)) {
        const endField = extension_vgField(fieldOrDatumDef, { expr, binSuffix: 'end' });
        return {
            signal: extension_binFormatExpression(field, endField, format, formatType, config)
        };
    }
    else if (format || extension_channelDefType(fieldOrDatumDef) === 'quantitative') {
        return {
            signal: `${extension_formatExpr(field, format)}`
        };
    }
    else {
        return { signal: `isValid(${field}) ? ${field} : ""+${field}` };
    }
}
function extension_fieldToFormat(fieldOrDatumDef, expr, normalizeStack) {
    if (extension_isFieldDef(fieldOrDatumDef)) {
        if (normalizeStack) {
            return `${extension_vgField(fieldOrDatumDef, { expr, suffix: 'end' })}-${extension_vgField(fieldOrDatumDef, {
                expr,
                suffix: 'start'
            })}`;
        }
        else {
            return extension_vgField(fieldOrDatumDef, { expr });
        }
    }
    else {
        return extension_datumDefToExpr(fieldOrDatumDef);
    }
}
function extension_formatCustomType({ fieldOrDatumDef, format, formatType, expr, normalizeStack, config, field }) {
    field ?? (field = extension_fieldToFormat(fieldOrDatumDef, expr, normalizeStack));
    if (field !== 'datum.value' && // For axis/legend, we can't correctly know the end of the bin from `datum`
        extension_isFieldDef(fieldOrDatumDef) &&
        extension_isBinning(fieldOrDatumDef.bin)) {
        const endField = extension_vgField(fieldOrDatumDef, { expr, binSuffix: 'end' });
        return {
            signal: extension_binFormatExpression(field, endField, format, formatType, config)
        };
    }
    return { signal: extension_customFormatExpr(formatType, field, format) };
}
function extension_guideFormat(fieldOrDatumDef, type, format, formatType, config, omitTimeFormatConfig // axis doesn't use config.timeFormat
) {
    if (extension_vega_util_module_isString(formatType) && extension_isCustomFormatType(formatType)) {
        return undefined; // handled in encode block
    }
    else if (format === undefined && formatType === undefined && config.customFormatTypes) {
        if (extension_channelDefType(fieldOrDatumDef) === 'quantitative') {
            if (config.normalizedNumberFormatType &&
                extension_isPositionFieldOrDatumDef(fieldOrDatumDef) &&
                fieldOrDatumDef.stack === 'normalize') {
                return undefined; // handled in encode block
            }
            if (config.numberFormatType) {
                return undefined; // handled in encode block
            }
        }
    }
    if (extension_isPositionFieldOrDatumDef(fieldOrDatumDef) &&
        fieldOrDatumDef.stack === 'normalize' &&
        config.normalizedNumberFormat) {
        return extension_numberFormat({
            type: 'quantitative',
            config,
            normalizeStack: true
        });
    }
    if (extension_isFieldOrDatumDefForTimeFormat(fieldOrDatumDef)) {
        const timeUnit = extension_isFieldDef(fieldOrDatumDef) ? extension_normalizeTimeUnit(fieldOrDatumDef.timeUnit)?.unit : undefined;
        if (timeUnit === undefined && config.customFormatTypes && config.timeFormatType) {
            return undefined; // hanlded in encode block
        }
        return extension_format_timeFormat({ specifiedFormat: format, timeUnit, config, omitTimeFormatConfig });
    }
    return extension_numberFormat({ type, specifiedFormat: format, config });
}
function extension_guideFormatType(formatType, fieldOrDatumDef, scaleType) {
    if (formatType && (extension_isSignalRef(formatType) || formatType === 'number' || formatType === 'time')) {
        return formatType;
    }
    if (extension_isFieldOrDatumDefForTimeFormat(fieldOrDatumDef) && scaleType !== 'time' && scaleType !== 'utc') {
        return extension_isFieldDef(fieldOrDatumDef) && extension_normalizeTimeUnit(fieldOrDatumDef?.timeUnit)?.utc ? 'utc' : 'time';
    }
    return undefined;
}
/**
 * Returns number format for a fieldDef.
 */
function extension_numberFormat({ type, specifiedFormat, config, normalizeStack }) {
    // Specified format in axis/legend has higher precedence than fieldDef.format
    if (extension_vega_util_module_isString(specifiedFormat)) {
        return specifiedFormat;
    }
    if (type === extension_QUANTITATIVE) {
        // we only apply the default if the field is quantitative
        return normalizeStack ? config.normalizedNumberFormat : config.numberFormat;
    }
    return undefined;
}
/**
 * Returns time format for a fieldDef for use in guides.
 */
function extension_format_timeFormat({ specifiedFormat, timeUnit, config, omitTimeFormatConfig }) {
    if (specifiedFormat) {
        return specifiedFormat;
    }
    if (timeUnit) {
        return {
            signal: extension_timeUnitSpecifierExpression(timeUnit)
        };
    }
    return omitTimeFormatConfig ? undefined : config.timeFormat;
}
function extension_formatExpr(field, format) {
    return `format(${field}, "${format || ''}")`;
}
function extension_binNumberFormatExpr(field, format, formatType, config) {
    if (extension_isCustomFormatType(formatType)) {
        return extension_customFormatExpr(formatType, field, format);
    }
    return extension_formatExpr(field, (extension_vega_util_module_isString(format) ? format : undefined) ?? config.numberFormat);
}
function extension_binFormatExpression(startField, endField, format, formatType, config) {
    if (format === undefined && formatType === undefined && config.customFormatTypes && config.numberFormatType) {
        return extension_binFormatExpression(startField, endField, config.numberFormat, config.numberFormatType, config);
    }
    const start = extension_binNumberFormatExpr(startField, format, formatType, config);
    const end = extension_binNumberFormatExpr(endField, format, formatType, config);
    return `${extension_fieldValidPredicate(startField, false)} ? "null" : ${start} + "${extension_format_BIN_RANGE_DELIMITER}" + ${end}`;
}
/**
 * Returns the time expression used for axis/legend labels or text mark for a temporal field
 */
function extension_timeFormatExpression({ field, timeUnit, format, formatType, rawTimeFormat, isUTCScale }) {
    if (!timeUnit || format) {
        // If there is no time unit, or if user explicitly specifies format for axis/legend/text.
        if (!timeUnit && formatType) {
            return `${formatType}(${field}, '${format}')`;
        }
        format = extension_vega_util_module_isString(format) ? format : rawTimeFormat; // only use provided timeFormat if there is no timeUnit.
        return `${isUTCScale ? 'utc' : 'time'}Format(${field}, '${format}')`;
    }
    else {
        return extension_formatExpression(timeUnit, field, isUTCScale);
    }
}
//# sourceMappingURL=format.js.map
;// ../../node_modules/vega-lite/build/src/sort.js


const extension_DEFAULT_SORT_OP = 'min';
const extension_SORT_BY_CHANNEL_INDEX = {
    x: 1,
    y: 1,
    color: 1,
    fill: 1,
    stroke: 1,
    strokeWidth: 1,
    size: 1,
    shape: 1,
    fillOpacity: 1,
    strokeOpacity: 1,
    opacity: 1,
    text: 1
};
function extension_isSortByChannel(c) {
    return extension_vega_util_module_has(extension_SORT_BY_CHANNEL_INDEX, c);
}
function extension_isSortByEncoding(sort) {
    return extension_util_hasProperty(sort, 'encoding');
}
function extension_isSortField(sort) {
    return sort && (sort.op === 'count' || extension_util_hasProperty(sort, 'field'));
}
function extension_isSortArray(sort) {
    return sort && extension_vega_util_module_isArray(sort);
}
//# sourceMappingURL=sort.js.map
;// ../../node_modules/vega-lite/build/src/spec/facet.js

function extension_isFacetMapping(f) {
    return extension_util_hasProperty(f, 'row') || extension_util_hasProperty(f, 'column');
}
function extension_isFacetFieldDef(channelDef) {
    return extension_util_hasProperty(channelDef, 'header');
}
function extension_isFacetSpec(spec) {
    return extension_util_hasProperty(spec, 'facet');
}
//# sourceMappingURL=facet.js.map
;// ../../node_modules/vega-lite/build/src/channeldef.js

















function extension_isConditionalParameter(c) {
    return extension_util_hasProperty(c, 'param');
}
function extension_isRepeatRef(field) {
    return !extension_vega_util_module_isString(field) && extension_util_hasProperty(field, 'repeat');
}
function extension_toFieldDefBase(fieldDef) {
    const { field, timeUnit, bin, aggregate } = fieldDef;
    return {
        ...(timeUnit ? { timeUnit } : {}),
        ...(bin ? { bin } : {}),
        ...(aggregate ? { aggregate } : {}),
        field
    };
}
function extension_isSortableFieldDef(fieldDef) {
    return extension_util_hasProperty(fieldDef, 'sort');
}
function extension_getBandPosition({ fieldDef, fieldDef2, markDef: mark, config }) {
    if (extension_isFieldOrDatumDef(fieldDef) && fieldDef.bandPosition !== undefined) {
        return fieldDef.bandPosition;
    }
    if (extension_isFieldDef(fieldDef)) {
        const { timeUnit, bin } = fieldDef;
        if (timeUnit && !fieldDef2) {
            return extension_getMarkConfig('timeUnitBandPosition', mark, config);
        }
        else if (extension_isBinning(bin)) {
            return 0.5;
        }
    }
    return undefined;
}
function extension_getBandSize({ channel, fieldDef, fieldDef2, markDef: mark, config, scaleType, useVlSizeChannel }) {
    const sizeChannel = extension_getSizeChannel(channel);
    const size = extension_getMarkPropOrConfig(useVlSizeChannel ? 'size' : sizeChannel, mark, config, {
        vgChannel: sizeChannel
    });
    if (size !== undefined) {
        return size;
    }
    if (extension_isFieldDef(fieldDef)) {
        const { timeUnit, bin } = fieldDef;
        if (timeUnit && !fieldDef2) {
            return { band: extension_getMarkConfig('timeUnitBandSize', mark, config) };
        }
        else if (extension_isBinning(bin) && !extension_hasDiscreteDomain(scaleType)) {
            return { band: 1 };
        }
    }
    if (extension_isRectBasedMark(mark.type)) {
        if (scaleType) {
            if (extension_hasDiscreteDomain(scaleType)) {
                return config[mark.type]?.discreteBandSize || { band: 1 };
            }
            else {
                return config[mark.type]?.continuousBandSize;
            }
        }
        return config[mark.type]?.discreteBandSize;
    }
    return undefined;
}
function extension_hasBandEnd(fieldDef, fieldDef2, markDef, config) {
    if (extension_isBinning(fieldDef.bin) || (fieldDef.timeUnit && extension_isTypedFieldDef(fieldDef) && fieldDef.type === 'temporal')) {
        // Need to check bandPosition because non-rect marks (e.g., point) with timeUnit
        // doesn't have to use bandEnd if there is no bandPosition.
        return extension_getBandPosition({ fieldDef, fieldDef2, markDef, config }) !== undefined;
    }
    return false;
}
function extension_isOrderOnlyDef(orderDef) {
    return extension_util_hasProperty(orderDef, 'sort') && !extension_util_hasProperty(orderDef, 'field');
}
function extension_isConditionalDef(channelDef) {
    return extension_util_hasProperty(channelDef, 'condition');
}
/**
 * Return if a channelDef is a ConditionalValueDef with ConditionFieldDef
 */
function extension_hasConditionalFieldDef(channelDef) {
    const condition = channelDef?.['condition'];
    return !!condition && !extension_vega_util_module_isArray(condition) && extension_isFieldDef(condition);
}
function extension_hasConditionalFieldOrDatumDef(channelDef) {
    const condition = channelDef?.['condition'];
    return !!condition && !extension_vega_util_module_isArray(condition) && extension_isFieldOrDatumDef(condition);
}
function extension_hasConditionalValueDef(channelDef) {
    const condition = channelDef?.['condition'];
    return !!condition && (extension_vega_util_module_isArray(condition) || extension_isValueDef(condition));
}
function extension_isFieldDef(channelDef) {
    return extension_util_hasProperty(channelDef, 'field') || channelDef?.aggregate === 'count';
}
function extension_channelDefType(channelDef) {
    return channelDef?.['type'];
}
function extension_isDatumDef(channelDef) {
    return extension_util_hasProperty(channelDef, 'datum');
}
function extension_isContinuousFieldOrDatumDef(cd) {
    // TODO: make datum support DateTime object
    return (extension_isTypedFieldDef(cd) && !extension_channeldef_isDiscrete(cd)) || extension_isNumericDataDef(cd);
}
function extension_isUnbinnedQuantitativeFieldOrDatumDef(cd) {
    // TODO: make datum support DateTime object
    return (extension_isTypedFieldDef(cd) && cd.type === 'quantitative' && !cd.bin) || extension_isNumericDataDef(cd);
}
function extension_isNumericDataDef(cd) {
    return extension_isDatumDef(cd) && extension_vega_util_module_isNumber(cd.datum);
}
function extension_isFieldOrDatumDef(channelDef) {
    return extension_isFieldDef(channelDef) || extension_isDatumDef(channelDef);
}
function extension_isTypedFieldDef(channelDef) {
    return (channelDef &&
        (extension_util_hasProperty(channelDef, 'field') || channelDef['aggregate'] === 'count') &&
        extension_util_hasProperty(channelDef, 'type'));
}
function extension_isValueDef(channelDef) {
    return extension_util_hasProperty(channelDef, 'value');
}
function extension_isScaleFieldDef(channelDef) {
    return extension_util_hasProperty(channelDef, 'scale') || extension_util_hasProperty(channelDef, 'sort');
}
function extension_isPositionFieldOrDatumDef(channelDef) {
    return extension_util_hasProperty(channelDef, 'axis') || extension_util_hasProperty(channelDef, 'stack') || extension_util_hasProperty(channelDef, 'impute');
}
function extension_isMarkPropFieldOrDatumDef(channelDef) {
    return extension_util_hasProperty(channelDef, 'legend');
}
function extension_isStringFieldOrDatumDef(channelDef) {
    return extension_util_hasProperty(channelDef, 'format') || extension_util_hasProperty(channelDef, 'formatType');
}
function extension_toStringFieldDef(fieldDef) {
    // omit properties that don't exist in string field defs
    return extension_omit(fieldDef, ['legend', 'axis', 'header', 'scale']);
}
function extension_isOpFieldDef(fieldDef) {
    return extension_util_hasProperty(fieldDef, 'op');
}
/**
 * Get a Vega field reference from a Vega-Lite field def.
 */
function extension_vgField(fieldDef, opt = {}) {
    let field = fieldDef.field;
    const prefix = opt.prefix;
    let suffix = opt.suffix;
    let argAccessor = ''; // for accessing argmin/argmax field at the end without getting escaped
    if (extension_isCount(fieldDef)) {
        field = extension_internalField('count');
    }
    else {
        let fn;
        if (!opt.nofn) {
            if (extension_isOpFieldDef(fieldDef)) {
                fn = fieldDef.op;
            }
            else {
                const { bin, aggregate, timeUnit } = fieldDef;
                if (extension_isBinning(bin)) {
                    fn = extension_binToString(bin);
                    suffix = (opt.binSuffix ?? '') + (opt.suffix ?? '');
                }
                else if (aggregate) {
                    if (extension_isArgmaxDef(aggregate)) {
                        argAccessor = `["${field}"]`;
                        field = `argmax_${aggregate.argmax}`;
                    }
                    else if (extension_isArgminDef(aggregate)) {
                        argAccessor = `["${field}"]`;
                        field = `argmin_${aggregate.argmin}`;
                    }
                    else {
                        fn = String(aggregate);
                    }
                }
                else if (timeUnit && !extension_isBinnedTimeUnit(timeUnit)) {
                    fn = extension_timeUnitToString(timeUnit);
                    suffix = ((!['range', 'mid'].includes(opt.binSuffix) && opt.binSuffix) || '') + (opt.suffix ?? '');
                }
            }
        }
        if (fn) {
            field = field ? `${fn}_${field}` : fn;
        }
    }
    if (suffix) {
        field = `${field}_${suffix}`;
    }
    if (prefix) {
        field = `${prefix}_${field}`;
    }
    if (opt.forAs) {
        return extension_removePathFromField(field);
    }
    else if (opt.expr) {
        // Expression to access flattened field. No need to escape dots.
        return extension_flatAccessWithDatum(field, opt.expr) + argAccessor;
    }
    else {
        // We flattened all fields so paths should have become dot.
        return extension_replacePathInField(field) + argAccessor;
    }
}
function extension_channeldef_isDiscrete(def) {
    switch (def.type) {
        case 'nominal':
        case 'ordinal':
        case 'geojson':
            return true;
        case 'quantitative':
            return extension_isFieldDef(def) && !!def.bin;
        case 'temporal':
            return false;
    }
    throw new Error(extension_invalidFieldType(def.type));
}
function extension_channeldef_isDiscretizing(def) {
    return extension_isScaleFieldDef(def) && extension_isContinuousToDiscrete(def.scale?.type);
}
function extension_isCount(fieldDef) {
    return fieldDef.aggregate === 'count';
}
function extension_verbalTitleFormatter(fieldDef, config) {
    const { field, bin, timeUnit, aggregate } = fieldDef;
    if (aggregate === 'count') {
        return config.countTitle;
    }
    else if (extension_isBinning(bin)) {
        return `${field} (binned)`;
    }
    else if (timeUnit && !extension_isBinnedTimeUnit(timeUnit)) {
        const unit = extension_normalizeTimeUnit(timeUnit)?.unit;
        if (unit) {
            return `${field} (${extension_getTimeUnitParts(unit).join('-')})`;
        }
    }
    else if (aggregate) {
        if (extension_isArgmaxDef(aggregate)) {
            return `${field} for max ${aggregate.argmax}`;
        }
        else if (extension_isArgminDef(aggregate)) {
            return `${field} for min ${aggregate.argmin}`;
        }
        else {
            return `${extension_titleCase(aggregate)} of ${field}`;
        }
    }
    return field;
}
function extension_functionalTitleFormatter(fieldDef) {
    const { aggregate, bin, timeUnit, field } = fieldDef;
    if (extension_isArgmaxDef(aggregate)) {
        return `${field} for argmax(${aggregate.argmax})`;
    }
    else if (extension_isArgminDef(aggregate)) {
        return `${field} for argmin(${aggregate.argmin})`;
    }
    const timeUnitParams = timeUnit && !extension_isBinnedTimeUnit(timeUnit) ? extension_normalizeTimeUnit(timeUnit) : undefined;
    const fn = aggregate || timeUnitParams?.unit || (timeUnitParams?.maxbins && 'timeunit') || (extension_isBinning(bin) && 'bin');
    return fn ? `${fn.toUpperCase()}(${field})` : field;
}
const extension_defaultTitleFormatter = (fieldDef, config) => {
    switch (config.fieldTitle) {
        case 'plain':
            return fieldDef.field;
        case 'functional':
            return extension_functionalTitleFormatter(fieldDef);
        default:
            return extension_verbalTitleFormatter(fieldDef, config);
    }
};
let extension_titleFormatter = extension_defaultTitleFormatter;
function extension_setTitleFormatter(formatter) {
    extension_titleFormatter = formatter;
}
function extension_resetTitleFormatter() {
    extension_setTitleFormatter(extension_defaultTitleFormatter);
}
function extension_channeldef_title(fieldOrDatumDef, config, { allowDisabling, includeDefault = true }) {
    const guideTitle = extension_getGuide(fieldOrDatumDef)?.title;
    if (!extension_isFieldDef(fieldOrDatumDef)) {
        return guideTitle ?? fieldOrDatumDef.title;
    }
    const fieldDef = fieldOrDatumDef;
    const def = includeDefault ? extension_defaultTitle(fieldDef, config) : undefined;
    if (allowDisabling) {
        return extension_getFirstDefined(guideTitle, fieldDef.title, def);
    }
    else {
        return guideTitle ?? fieldDef.title ?? def;
    }
}
function extension_getGuide(fieldDef) {
    if (extension_isPositionFieldOrDatumDef(fieldDef) && fieldDef.axis) {
        return fieldDef.axis;
    }
    else if (extension_isMarkPropFieldOrDatumDef(fieldDef) && fieldDef.legend) {
        return fieldDef.legend;
    }
    else if (extension_isFacetFieldDef(fieldDef) && fieldDef.header) {
        return fieldDef.header;
    }
    return undefined;
}
function extension_defaultTitle(fieldDef, config) {
    return extension_titleFormatter(fieldDef, config);
}
function extension_getFormatMixins(fieldDef) {
    if (extension_isStringFieldOrDatumDef(fieldDef)) {
        const { format, formatType } = fieldDef;
        return { format, formatType };
    }
    else {
        const guide = extension_getGuide(fieldDef) ?? {};
        const { format, formatType } = guide;
        return { format, formatType };
    }
}
function extension_defaultType(fieldDef, channel) {
    switch (channel) {
        case 'latitude':
        case 'longitude':
            return 'quantitative';
        case 'row':
        case 'column':
        case 'facet':
        case 'shape':
        case 'strokeDash':
            return 'nominal';
        case 'order':
            return 'ordinal';
    }
    if (extension_isSortableFieldDef(fieldDef) && extension_vega_util_module_isArray(fieldDef.sort)) {
        return 'ordinal';
    }
    const { aggregate, bin, timeUnit } = fieldDef;
    if (timeUnit) {
        return 'temporal';
    }
    if (bin || (aggregate && !extension_isArgmaxDef(aggregate) && !extension_isArgminDef(aggregate))) {
        return 'quantitative';
    }
    if (extension_isScaleFieldDef(fieldDef) && fieldDef.scale?.type) {
        switch (extension_SCALE_CATEGORY_INDEX[fieldDef.scale.type]) {
            case 'numeric':
            case 'discretizing':
                return 'quantitative';
            case 'time':
                return 'temporal';
        }
    }
    return 'nominal';
}
/**
 * Returns the fieldDef -- either from the outer channelDef or from the condition of channelDef.
 * @param channelDef
 */
function extension_getFieldDef(channelDef) {
    if (extension_isFieldDef(channelDef)) {
        return channelDef;
    }
    else if (extension_hasConditionalFieldDef(channelDef)) {
        return channelDef.condition;
    }
    return undefined;
}
function extension_getFieldOrDatumDef(channelDef) {
    if (extension_isFieldOrDatumDef(channelDef)) {
        return channelDef;
    }
    else if (extension_hasConditionalFieldOrDatumDef(channelDef)) {
        return channelDef.condition;
    }
    return undefined;
}
/**
 * Convert type to full, lowercase type, or augment the fieldDef with a default type if missing.
 */
function extension_initChannelDef(channelDef, channel, config, opt = {}) {
    if (extension_vega_util_module_isString(channelDef) || extension_vega_util_module_isNumber(channelDef) || extension_vega_util_module_isBoolean(channelDef)) {
        const primitiveType = extension_vega_util_module_isString(channelDef) ? 'string' : extension_vega_util_module_isNumber(channelDef) ? 'number' : 'boolean';
        extension_log_warn(extension_primitiveChannelDef(channel, primitiveType, channelDef));
        return { value: channelDef };
    }
    // If a fieldDef contains a field, we need type.
    if (extension_isFieldOrDatumDef(channelDef)) {
        return extension_initFieldOrDatumDef(channelDef, channel, config, opt);
    }
    else if (extension_hasConditionalFieldOrDatumDef(channelDef)) {
        return {
            ...channelDef,
            // Need to cast as normalizeFieldDef normally return FieldDef, but here we know that it is definitely Condition<FieldDef>
            condition: extension_initFieldOrDatumDef(channelDef.condition, channel, config, opt)
        };
    }
    return channelDef;
}
function extension_initFieldOrDatumDef(fd, channel, config, opt) {
    if (extension_isStringFieldOrDatumDef(fd)) {
        const { format, formatType, ...rest } = fd;
        if (extension_isCustomFormatType(formatType) && !config.customFormatTypes) {
            extension_log_warn(extension_customFormatTypeNotAllowed(channel));
            return extension_initFieldOrDatumDef(rest, channel, config, opt);
        }
    }
    else {
        const guideType = extension_isPositionFieldOrDatumDef(fd)
            ? 'axis'
            : extension_isMarkPropFieldOrDatumDef(fd)
                ? 'legend'
                : extension_isFacetFieldDef(fd)
                    ? 'header'
                    : null;
        if (guideType && fd[guideType]) {
            const { format, formatType, ...newGuide } = fd[guideType];
            if (extension_isCustomFormatType(formatType) && !config.customFormatTypes) {
                extension_log_warn(extension_customFormatTypeNotAllowed(channel));
                return extension_initFieldOrDatumDef({ ...fd, [guideType]: newGuide }, channel, config, opt);
            }
        }
    }
    if (extension_isFieldDef(fd)) {
        return extension_initFieldDef(fd, channel, opt);
    }
    return extension_initDatumDef(fd);
}
function extension_initDatumDef(datumDef) {
    let type = datumDef['type'];
    if (type) {
        return datumDef;
    }
    const { datum } = datumDef;
    type = extension_vega_util_module_isNumber(datum) ? 'quantitative' : extension_vega_util_module_isString(datum) ? 'nominal' : extension_isDateTime(datum) ? 'temporal' : undefined;
    return { ...datumDef, type };
}
function extension_initFieldDef(fd, channel, { compositeMark = false } = {}) {
    const { aggregate, timeUnit, bin, field } = fd;
    const fieldDef = { ...fd };
    // Drop invalid aggregate
    if (!compositeMark && aggregate && !extension_isAggregateOp(aggregate) && !extension_isArgmaxDef(aggregate) && !extension_isArgminDef(aggregate)) {
        extension_log_warn(extension_invalidAggregate(aggregate));
        delete fieldDef.aggregate;
    }
    // Normalize Time Unit
    if (timeUnit) {
        fieldDef.timeUnit = extension_normalizeTimeUnit(timeUnit);
    }
    if (field) {
        fieldDef.field = `${field}`;
    }
    // Normalize bin
    if (extension_isBinning(bin)) {
        fieldDef.bin = extension_normalizeBin(bin, channel);
    }
    if (extension_isBinned(bin) && !extension_isXorY(channel)) {
        extension_log_warn(extension_channelShouldNotBeUsedForBinned(channel));
    }
    // Normalize Type
    if (extension_isTypedFieldDef(fieldDef)) {
        const { type } = fieldDef;
        const fullType = extension_getFullName(type);
        if (type !== fullType) {
            // convert short type to full type
            fieldDef.type = fullType;
        }
        if (type !== 'quantitative') {
            if (extension_isCountingAggregateOp(aggregate)) {
                extension_log_warn(extension_invalidFieldTypeForCountAggregate(type, aggregate));
                fieldDef.type = 'quantitative';
            }
        }
    }
    else if (!extension_isSecondaryRangeChannel(channel)) {
        // If type is empty / invalid, then augment with default type
        const newType = extension_defaultType(fieldDef, channel);
        fieldDef['type'] = newType;
    }
    if (extension_isTypedFieldDef(fieldDef)) {
        const { compatible, warning } = extension_channelCompatibility(fieldDef, channel) || {};
        if (compatible === false) {
            extension_log_warn(warning);
        }
    }
    if (extension_isSortableFieldDef(fieldDef) && extension_vega_util_module_isString(fieldDef.sort)) {
        const { sort } = fieldDef;
        if (extension_isSortByChannel(sort)) {
            return {
                ...fieldDef,
                sort: { encoding: sort }
            };
        }
        const sub = sort.substring(1);
        if (sort.charAt(0) === '-' && extension_isSortByChannel(sub)) {
            return {
                ...fieldDef,
                sort: { encoding: sub, order: 'descending' }
            };
        }
    }
    if (extension_isFacetFieldDef(fieldDef)) {
        const { header } = fieldDef;
        if (header) {
            const { orient, ...rest } = header;
            if (orient) {
                return {
                    ...fieldDef,
                    header: {
                        ...rest,
                        labelOrient: header.labelOrient || orient,
                        titleOrient: header.titleOrient || orient
                    }
                };
            }
        }
    }
    return fieldDef;
}
function extension_normalizeBin(bin, channel) {
    if (extension_vega_util_module_isBoolean(bin)) {
        return { maxbins: extension_autoMaxBins(channel) };
    }
    else if (bin === 'binned') {
        return {
            binned: true
        };
    }
    else if (!bin.maxbins && !bin.step) {
        return { ...bin, maxbins: extension_autoMaxBins(channel) };
    }
    else {
        return bin;
    }
}
const extension_COMPATIBLE = { compatible: true };
function extension_channelCompatibility(fieldDef, channel) {
    const type = fieldDef.type;
    if (type === 'geojson' && channel !== 'shape') {
        return {
            compatible: false,
            warning: `Channel ${channel} should not be used with a geojson data.`
        };
    }
    switch (channel) {
        case extension_ROW:
        case extension_COLUMN:
        case extension_FACET:
            if (!extension_channeldef_isDiscrete(fieldDef)) {
                return {
                    compatible: false,
                    warning: extension_channelShouldBeDiscrete(channel)
                };
            }
            return extension_COMPATIBLE;
        case extension_channel_X:
        case extension_channel_Y:
        case extension_XOFFSET:
        case extension_YOFFSET:
        case extension_COLOR:
        case extension_FILL:
        case extension_STROKE:
        case extension_TEXT:
        case extension_DETAIL:
        case extension_KEY:
        case extension_TOOLTIP:
        case extension_HREF:
        case extension_channel_URL:
        case extension_ANGLE:
        case extension_THETA:
        case extension_RADIUS:
        case extension_DESCRIPTION:
            return extension_COMPATIBLE;
        case extension_LONGITUDE:
        case extension_LONGITUDE2:
        case extension_LATITUDE:
        case extension_LATITUDE2:
            if (type !== extension_QUANTITATIVE) {
                return {
                    compatible: false,
                    warning: `Channel ${channel} should be used with a quantitative field only, not ${fieldDef.type} field.`
                };
            }
            return extension_COMPATIBLE;
        case extension_OPACITY:
        case extension_FILLOPACITY:
        case extension_STROKEOPACITY:
        case extension_STROKEWIDTH:
        case extension_channel_SIZE:
        case extension_THETA2:
        case extension_RADIUS2:
        case extension_channel_X2:
        case extension_channel_Y2:
        case extension_TIME:
            if (type === 'nominal' && !fieldDef['sort']) {
                return {
                    compatible: false,
                    warning: `Channel ${channel} should not be used with an unsorted discrete field.`
                };
            }
            return extension_COMPATIBLE;
        case extension_SHAPE:
        case extension_STROKEDASH:
            if (!extension_channeldef_isDiscrete(fieldDef) && !extension_channeldef_isDiscretizing(fieldDef)) {
                return {
                    compatible: false,
                    warning: extension_channelShouldBeDiscreteOrDiscretizing(channel)
                };
            }
            return extension_COMPATIBLE;
        case extension_ORDER:
            if (fieldDef.type === 'nominal' && !('sort' in fieldDef)) {
                return {
                    compatible: false,
                    warning: `Channel order is inappropriate for nominal field, which has no inherent order.`
                };
            }
            return extension_COMPATIBLE;
    }
}
/**
 * Check if the field def uses a time format or does not use any format but is temporal
 * (this does not cover field defs that are temporal but use a number format).
 */
function extension_isFieldOrDatumDefForTimeFormat(fieldOrDatumDef) {
    const { formatType } = extension_getFormatMixins(fieldOrDatumDef);
    return formatType === 'time' || (!formatType && extension_isTemporalFieldDef(fieldOrDatumDef));
}
/**
 * Check if field def has type `temporal`. If you want to also cover field defs that use a time format, use `isFieldOrDatumDefForTimeFormat`.
 */
function extension_isTemporalFieldDef(def) {
    return def && (def['type'] === 'temporal' || (extension_isFieldDef(def) && !!def.timeUnit));
}
/**
 * Getting a value associated with a fielddef.
 * Convert the value to Vega expression if applicable (for datetime object, or string if the field def is temporal or has timeUnit)
 */
function extension_valueExpr(v, { timeUnit, type, wrapTime, undefinedIfExprNotRequired }) {
    const unit = timeUnit && extension_normalizeTimeUnit(timeUnit)?.unit;
    let isTime = unit || type === 'temporal';
    let expr;
    if (extension_isExprRef(v)) {
        expr = v.expr;
    }
    else if (extension_isSignalRef(v)) {
        expr = v.signal;
    }
    else if (extension_isDateTime(v)) {
        isTime = true;
        expr = extension_dateTimeToExpr(v);
    }
    else if (extension_vega_util_module_isString(v) || extension_vega_util_module_isNumber(v)) {
        if (isTime) {
            expr = `datetime(${extension_util_stringify(v)})`;
            if (extension_isLocalSingleTimeUnit(unit)) {
                // for single timeUnit, we will use dateTimeToExpr to convert number/string to match the timeUnit
                if ((extension_vega_util_module_isNumber(v) && v < 10000) || (extension_vega_util_module_isString(v) && isNaN(Date.parse(v)))) {
                    expr = extension_dateTimeToExpr({ [unit]: v });
                }
            }
        }
    }
    if (expr) {
        return wrapTime && isTime ? `time(${expr})` : expr;
    }
    // number or boolean or normal string
    return undefinedIfExprNotRequired ? undefined : extension_util_stringify(v);
}
/**
 * Standardize value array -- convert each value to Vega expression if applicable
 */
function extension_valueArray(fieldOrDatumDef, values) {
    const { type } = fieldOrDatumDef;
    return values.map(v => {
        const timeUnit = extension_isFieldDef(fieldOrDatumDef) && !extension_isBinnedTimeUnit(fieldOrDatumDef.timeUnit) ? fieldOrDatumDef.timeUnit : undefined;
        const expr = extension_valueExpr(v, {
            timeUnit,
            type,
            undefinedIfExprNotRequired: true
        });
        // return signal for the expression if we need an expression
        if (expr !== undefined) {
            return { signal: expr };
        }
        // otherwise just return the original value
        return v;
    });
}
/**
 * Checks whether a fieldDef for a particular channel requires a computed bin range.
 */
function extension_binRequiresRange(fieldDef, channel) {
    if (!extension_isBinning(fieldDef.bin)) {
        console.warn('Only call this method for binned field defs.');
        return false;
    }
    // We need the range only when the user explicitly forces a binned field to be use discrete scale. In this case, bin range is used in axis and legend labels.
    // We could check whether the axis or legend exists (not disabled) but that seems overkill.
    return extension_isScaleChannel(channel) && ['ordinal', 'nominal'].includes(fieldDef.type);
}
//# sourceMappingURL=channeldef.js.map
;// ../../node_modules/vega-lite/build/src/axis.js


const extension_CONDITIONAL_AXIS_PROP_INDEX = {
    labelAlign: {
        part: 'labels',
        vgProp: 'align'
    },
    labelBaseline: {
        part: 'labels',
        vgProp: 'baseline'
    },
    labelColor: {
        part: 'labels',
        vgProp: 'fill'
    },
    labelFont: {
        part: 'labels',
        vgProp: 'font'
    },
    labelFontSize: {
        part: 'labels',
        vgProp: 'fontSize'
    },
    labelFontStyle: {
        part: 'labels',
        vgProp: 'fontStyle'
    },
    labelFontWeight: {
        part: 'labels',
        vgProp: 'fontWeight'
    },
    labelOpacity: {
        part: 'labels',
        vgProp: 'opacity'
    },
    labelOffset: null,
    labelPadding: null, // There is no fixed vgProp for tickSize, need to use signal.
    gridColor: {
        part: 'grid',
        vgProp: 'stroke'
    },
    gridDash: {
        part: 'grid',
        vgProp: 'strokeDash'
    },
    gridDashOffset: {
        part: 'grid',
        vgProp: 'strokeDashOffset'
    },
    gridOpacity: {
        part: 'grid',
        vgProp: 'opacity'
    },
    gridWidth: {
        part: 'grid',
        vgProp: 'strokeWidth'
    },
    tickColor: {
        part: 'ticks',
        vgProp: 'stroke'
    },
    tickDash: {
        part: 'ticks',
        vgProp: 'strokeDash'
    },
    tickDashOffset: {
        part: 'ticks',
        vgProp: 'strokeDashOffset'
    },
    tickOpacity: {
        part: 'ticks',
        vgProp: 'opacity'
    },
    tickSize: null, // There is no fixed vgProp for tickSize, need to use signal.
    tickWidth: {
        part: 'ticks',
        vgProp: 'strokeWidth'
    }
};
function extension_isConditionalAxisValue(v) {
    return v?.condition;
}
const extension_AXIS_PARTS = ['domain', 'grid', 'labels', 'ticks', 'title'];
/**
 * A dictionary listing whether a certain axis property is applicable for only main axes or only grid axes.
 */
const extension_AXIS_PROPERTY_TYPE = {
    grid: 'grid',
    gridCap: 'grid',
    gridColor: 'grid',
    gridDash: 'grid',
    gridDashOffset: 'grid',
    gridOpacity: 'grid',
    gridScale: 'grid',
    gridWidth: 'grid',
    orient: 'main',
    bandPosition: 'both', // Need to be applied to grid axis too, so the grid will align with ticks.
    aria: 'main',
    description: 'main',
    domain: 'main',
    domainCap: 'main',
    domainColor: 'main',
    domainDash: 'main',
    domainDashOffset: 'main',
    domainOpacity: 'main',
    domainWidth: 'main',
    format: 'main',
    formatType: 'main',
    labelAlign: 'main',
    labelAngle: 'main',
    labelBaseline: 'main',
    labelBound: 'main',
    labelColor: 'main',
    labelFlush: 'main',
    labelFlushOffset: 'main',
    labelFont: 'main',
    labelFontSize: 'main',
    labelFontStyle: 'main',
    labelFontWeight: 'main',
    labelLimit: 'main',
    labelLineHeight: 'main',
    labelOffset: 'main',
    labelOpacity: 'main',
    labelOverlap: 'main',
    labelPadding: 'main',
    labels: 'main',
    labelSeparation: 'main',
    maxExtent: 'main',
    minExtent: 'main',
    offset: 'both',
    position: 'main',
    tickCap: 'main',
    tickColor: 'main',
    tickDash: 'main',
    tickDashOffset: 'main',
    tickMinStep: 'both',
    tickOffset: 'both', // Need to be applied to grid axis too, so the grid will align with ticks.
    tickOpacity: 'main',
    tickRound: 'both', // Apply rounding to grid and ticks so they are aligned.
    ticks: 'main',
    tickSize: 'main',
    tickWidth: 'both',
    title: 'main',
    titleAlign: 'main',
    titleAnchor: 'main',
    titleAngle: 'main',
    titleBaseline: 'main',
    titleColor: 'main',
    titleFont: 'main',
    titleFontSize: 'main',
    titleFontStyle: 'main',
    titleFontWeight: 'main',
    titleLimit: 'main',
    titleLineHeight: 'main',
    titleOpacity: 'main',
    titlePadding: 'main',
    titleX: 'main',
    titleY: 'main',
    encode: 'both', // we hide this in Vega-Lite
    scale: 'both',
    tickBand: 'both',
    tickCount: 'both',
    tickExtra: 'both',
    translate: 'both',
    values: 'both',
    zindex: 'both' // this is actually set afterward, so it doesn't matter
};
const extension_COMMON_AXIS_PROPERTIES_INDEX = {
    orient: 1, // other things can depend on orient
    aria: 1,
    bandPosition: 1,
    description: 1,
    domain: 1,
    domainCap: 1,
    domainColor: 1,
    domainDash: 1,
    domainDashOffset: 1,
    domainOpacity: 1,
    domainWidth: 1,
    format: 1,
    formatType: 1,
    grid: 1,
    gridCap: 1,
    gridColor: 1,
    gridDash: 1,
    gridDashOffset: 1,
    gridOpacity: 1,
    gridWidth: 1,
    labelAlign: 1,
    labelAngle: 1,
    labelBaseline: 1,
    labelBound: 1,
    labelColor: 1,
    labelFlush: 1,
    labelFlushOffset: 1,
    labelFont: 1,
    labelFontSize: 1,
    labelFontStyle: 1,
    labelFontWeight: 1,
    labelLimit: 1,
    labelLineHeight: 1,
    labelOffset: 1,
    labelOpacity: 1,
    labelOverlap: 1,
    labelPadding: 1,
    labels: 1,
    labelSeparation: 1,
    maxExtent: 1,
    minExtent: 1,
    offset: 1,
    position: 1,
    tickBand: 1,
    tickCap: 1,
    tickColor: 1,
    tickCount: 1,
    tickDash: 1,
    tickDashOffset: 1,
    tickExtra: 1,
    tickMinStep: 1,
    tickOffset: 1,
    tickOpacity: 1,
    tickRound: 1,
    ticks: 1,
    tickSize: 1,
    tickWidth: 1,
    title: 1,
    titleAlign: 1,
    titleAnchor: 1,
    titleAngle: 1,
    titleBaseline: 1,
    titleColor: 1,
    titleFont: 1,
    titleFontSize: 1,
    titleFontStyle: 1,
    titleFontWeight: 1,
    titleLimit: 1,
    titleLineHeight: 1,
    titleOpacity: 1,
    titlePadding: 1,
    titleX: 1,
    titleY: 1,
    translate: 1,
    values: 1,
    zindex: 1
};
const extension_AXIS_PROPERTIES_INDEX = {
    ...extension_COMMON_AXIS_PROPERTIES_INDEX,
    style: 1,
    labelExpr: 1,
    encoding: 1
};
function extension_isAxisProperty(prop) {
    return extension_vega_util_module_has(extension_AXIS_PROPERTIES_INDEX, prop);
}
// Export for dependent projects
const extension_AXIS_PROPERTIES = extension_util_keys(extension_AXIS_PROPERTIES_INDEX);
const extension_AXIS_CONFIGS_INDEX = {
    axis: 1,
    axisBand: 1,
    axisBottom: 1,
    axisDiscrete: 1,
    axisLeft: 1,
    axisPoint: 1,
    axisQuantitative: 1,
    axisRight: 1,
    axisTemporal: 1,
    axisTop: 1,
    axisX: 1,
    axisXBand: 1,
    axisXDiscrete: 1,
    axisXPoint: 1,
    axisXQuantitative: 1,
    axisXTemporal: 1,
    axisY: 1,
    axisYBand: 1,
    axisYDiscrete: 1,
    axisYPoint: 1,
    axisYQuantitative: 1,
    axisYTemporal: 1
};
const extension_AXIS_CONFIGS = extension_util_keys(extension_AXIS_CONFIGS_INDEX);
//# sourceMappingURL=axis.js.map
;// ../../node_modules/vega-lite/build/src/spec/unit.js

function extension_isUnitSpec(spec) {
    return extension_util_hasProperty(spec, 'mark');
}
//# sourceMappingURL=unit.js.map
;// ../../node_modules/vega-lite/build/src/compositemark/base.js


class extension_CompositeMarkNormalizer {
    constructor(name, run) {
        this.name = name;
        this.run = run;
    }
    hasMatchingType(spec) {
        if (extension_isUnitSpec(spec)) {
            return extension_getMarkType(spec.mark) === this.name;
        }
        return false;
    }
}
//# sourceMappingURL=base.js.map
;// ../../node_modules/vega-lite/build/src/encoding.js










function extension_channelHasField(encoding, channel) {
    const channelDef = encoding && encoding[channel];
    if (channelDef) {
        if (extension_vega_util_module_isArray(channelDef)) {
            return extension_some(channelDef, fieldDef => !!fieldDef.field);
        }
        else {
            return extension_isFieldDef(channelDef) || extension_hasConditionalFieldDef(channelDef);
        }
    }
    return false;
}
function extension_channelHasFieldOrDatum(encoding, channel) {
    const channelDef = encoding && encoding[channel];
    if (channelDef) {
        if (extension_vega_util_module_isArray(channelDef)) {
            return extension_some(channelDef, fieldDef => !!fieldDef.field);
        }
        else {
            return extension_isFieldDef(channelDef) || extension_isDatumDef(channelDef) || extension_hasConditionalFieldOrDatumDef(channelDef);
        }
    }
    return false;
}
function extension_channelHasNestedOffsetScale(encoding, channel) {
    if (extension_isXorY(channel)) {
        const fieldDef = encoding[channel];
        if ((extension_isFieldDef(fieldDef) || extension_isDatumDef(fieldDef)) &&
            (extension_type_isDiscrete(fieldDef.type) || (extension_isFieldDef(fieldDef) && fieldDef.timeUnit))) {
            const offsetChannel = extension_getOffsetScaleChannel(channel);
            return extension_channelHasFieldOrDatum(encoding, offsetChannel);
        }
    }
    return false;
}
function extension_isAggregate(encoding) {
    return extension_some(extension_CHANNELS, channel => {
        if (extension_channelHasField(encoding, channel)) {
            const channelDef = encoding[channel];
            if (extension_vega_util_module_isArray(channelDef)) {
                return extension_some(channelDef, fieldDef => !!fieldDef.aggregate);
            }
            else {
                const fieldDef = extension_getFieldDef(channelDef);
                return fieldDef && !!fieldDef.aggregate;
            }
        }
        return false;
    });
}
function extension_extractTransformsFromEncoding(oldEncoding, config) {
    const groupby = [];
    const bins = [];
    const timeUnits = [];
    const aggregate = [];
    const encoding = {};
    extension_forEach(oldEncoding, (channelDef, channel) => {
        // Extract potential embedded transformations along with remaining properties
        if (extension_isFieldDef(channelDef)) {
            const { field, aggregate: aggOp, bin, timeUnit, ...remaining } = channelDef;
            if (aggOp || timeUnit || bin) {
                const guide = extension_getGuide(channelDef);
                const isTitleDefined = guide?.title;
                let newField = extension_vgField(channelDef, { forAs: true });
                const newFieldDef = {
                    // Only add title if it doesn't exist
                    ...(isTitleDefined ? [] : { title: extension_channeldef_title(channelDef, config, { allowDisabling: true }) }),
                    ...remaining,
                    // Always overwrite field
                    field: newField
                };
                if (aggOp) {
                    let op;
                    if (extension_isArgmaxDef(aggOp)) {
                        op = 'argmax';
                        newField = extension_vgField({ op: 'argmax', field: aggOp.argmax }, { forAs: true });
                        newFieldDef.field = `${newField}.${field}`;
                    }
                    else if (extension_isArgminDef(aggOp)) {
                        op = 'argmin';
                        newField = extension_vgField({ op: 'argmin', field: aggOp.argmin }, { forAs: true });
                        newFieldDef.field = `${newField}.${field}`;
                    }
                    else if (aggOp !== 'boxplot' && aggOp !== 'errorbar' && aggOp !== 'errorband') {
                        op = aggOp;
                    }
                    if (op) {
                        const aggregateEntry = {
                            op,
                            as: newField
                        };
                        if (field) {
                            aggregateEntry.field = field;
                        }
                        aggregate.push(aggregateEntry);
                    }
                }
                else {
                    groupby.push(newField);
                    if (extension_isTypedFieldDef(channelDef) && extension_isBinning(bin)) {
                        bins.push({ bin, field, as: newField });
                        // Add additional groupbys for range and end of bins
                        groupby.push(extension_vgField(channelDef, { binSuffix: 'end' }));
                        if (extension_binRequiresRange(channelDef, channel)) {
                            groupby.push(extension_vgField(channelDef, { binSuffix: 'range' }));
                        }
                        // Create accompanying 'x2' or 'y2' field if channel is 'x' or 'y' respectively
                        if (extension_isXorY(channel)) {
                            const secondaryChannel = {
                                field: `${newField}_end`
                            };
                            encoding[`${channel}2`] = secondaryChannel;
                        }
                        newFieldDef.bin = 'binned';
                        if (!extension_isSecondaryRangeChannel(channel)) {
                            newFieldDef['type'] = extension_QUANTITATIVE;
                        }
                    }
                    else if (timeUnit && !extension_isBinnedTimeUnit(timeUnit)) {
                        timeUnits.push({
                            timeUnit,
                            field,
                            as: newField
                        });
                        // define the format type for later compilation
                        const formatType = extension_isTypedFieldDef(channelDef) && channelDef.type !== extension_TEMPORAL && 'time';
                        if (formatType) {
                            if (channel === extension_TEXT || channel === extension_TOOLTIP) {
                                newFieldDef['formatType'] = formatType;
                            }
                            else if (extension_isNonPositionScaleChannel(channel)) {
                                newFieldDef['legend'] = {
                                    formatType,
                                    ...newFieldDef['legend']
                                };
                            }
                            else if (extension_isXorY(channel)) {
                                newFieldDef['axis'] = {
                                    formatType,
                                    ...newFieldDef['axis']
                                };
                            }
                        }
                    }
                }
                // now the field should refer to post-transformed field instead
                encoding[channel] = newFieldDef;
            }
            else {
                groupby.push(field);
                encoding[channel] = oldEncoding[channel];
            }
        }
        else {
            // For value def / signal ref / datum def, just copy
            encoding[channel] = oldEncoding[channel];
        }
    });
    return {
        bins,
        timeUnits,
        aggregate,
        groupby,
        encoding
    };
}
function extension_markChannelCompatible(encoding, channel, mark) {
    const markSupported = extension_supportMark(channel, mark);
    if (!markSupported) {
        return false;
    }
    else if (markSupported === 'binned') {
        const primaryFieldDef = encoding[channel === extension_channel_X2 ? extension_channel_X : extension_channel_Y];
        // circle, point, square and tick only support x2/y2 when their corresponding x/y fieldDef
        // has "binned" data and thus need x2/y2 to specify the bin-end field.
        if (extension_isFieldDef(primaryFieldDef) && extension_isFieldDef(encoding[channel]) && extension_isBinned(primaryFieldDef.bin)) {
            return true;
        }
        else {
            return false;
        }
    }
    return true;
}
function extension_initEncoding(encoding, mark, filled, config) {
    const normalizedEncoding = {};
    for (const key of extension_util_keys(encoding)) {
        if (!extension_isChannel(key)) {
            // Drop invalid channel
            extension_log_warn(extension_invalidEncodingChannel(key));
        }
    }
    for (let channel of extension_UNIT_CHANNELS) {
        if (!encoding[channel]) {
            continue;
        }
        const channelDef = encoding[channel];
        if (extension_isXorYOffset(channel)) {
            const mainChannel = extension_getMainChannelFromOffsetChannel(channel);
            const positionDef = normalizedEncoding[mainChannel];
            if (extension_isFieldDef(positionDef)) {
                if (extension_type_isContinuous(positionDef.type)) {
                    if (extension_isFieldDef(channelDef) && !positionDef.timeUnit) {
                        // TODO: nesting continuous field instead continuous field should
                        // behave like offsetting the data in data domain
                        extension_log_warn(extension_offsetNestedInsideContinuousPositionScaleDropped(mainChannel));
                        continue;
                    }
                }
            }
        }
        if (channel === 'angle' && mark === 'arc' && !encoding.theta) {
            extension_log_warn(extension_REPLACE_ANGLE_WITH_THETA);
            channel = extension_THETA;
        }
        if (!extension_markChannelCompatible(encoding, channel, mark)) {
            // Drop unsupported channel
            extension_log_warn(extension_incompatibleChannel(channel, mark));
            continue;
        }
        // Drop line's size if the field is aggregated.
        if (channel === extension_channel_SIZE && mark === 'line') {
            const fieldDef = extension_getFieldDef(encoding[channel]);
            if (fieldDef?.aggregate) {
                extension_log_warn(extension_LINE_WITH_VARYING_SIZE);
                continue;
            }
        }
        // Drop color if either fill or stroke is specified
        if (channel === extension_COLOR && (filled ? 'fill' in encoding : 'stroke' in encoding)) {
            extension_log_warn(extension_droppingColor('encoding', { fill: 'fill' in encoding, stroke: 'stroke' in encoding }));
            continue;
        }
        if (channel === extension_DETAIL ||
            (channel === extension_ORDER && !extension_vega_util_module_isArray(channelDef) && !extension_isValueDef(channelDef)) ||
            (channel === extension_TOOLTIP && extension_vega_util_module_isArray(channelDef))) {
            if (channelDef) {
                if (channel === extension_ORDER) {
                    const def = encoding[channel];
                    if (extension_isOrderOnlyDef(def)) {
                        normalizedEncoding[channel] = def;
                        continue;
                    }
                }
                // Array of fieldDefs for detail channel (or production rule)
                normalizedEncoding[channel] = extension_vega_util_module_array(channelDef).reduce((defs, fieldDef) => {
                    if (!extension_isFieldDef(fieldDef)) {
                        extension_log_warn(extension_emptyFieldDef(fieldDef, channel));
                    }
                    else {
                        defs.push(extension_initFieldDef(fieldDef, channel));
                    }
                    return defs;
                }, []);
            }
        }
        else {
            if (channel === extension_TOOLTIP && channelDef === null) {
                // Preserve null so we can use it to disable tooltip
                normalizedEncoding[channel] = null;
            }
            else if (!extension_isFieldDef(channelDef) &&
                !extension_isDatumDef(channelDef) &&
                !extension_isValueDef(channelDef) &&
                !extension_isConditionalDef(channelDef) &&
                !extension_isSignalRef(channelDef)) {
                extension_log_warn(extension_emptyFieldDef(channelDef, channel));
                continue;
            }
            normalizedEncoding[channel] = extension_initChannelDef(channelDef, channel, config);
        }
    }
    return normalizedEncoding;
}
/**
 * For composite marks, we have to call initChannelDef during init so we can infer types earlier.
 */
function extension_normalizeEncoding(encoding, config) {
    const normalizedEncoding = {};
    for (const channel of extension_util_keys(encoding)) {
        const newChannelDef = extension_initChannelDef(encoding[channel], channel, config, { compositeMark: true });
        normalizedEncoding[channel] = newChannelDef;
    }
    return normalizedEncoding;
}
function extension_fieldDefs(encoding) {
    const arr = [];
    for (const channel of extension_util_keys(encoding)) {
        if (extension_channelHasField(encoding, channel)) {
            const channelDef = encoding[channel];
            const channelDefArray = extension_vega_util_module_array(channelDef);
            for (const def of channelDefArray) {
                if (extension_isFieldDef(def)) {
                    arr.push(def);
                }
                else if (extension_hasConditionalFieldDef(def)) {
                    arr.push(def.condition);
                }
            }
        }
    }
    return arr;
}
function extension_forEach(mapping, f, thisArg) {
    if (!mapping) {
        return;
    }
    for (const channel of extension_util_keys(mapping)) {
        const el = mapping[channel];
        if (extension_vega_util_module_isArray(el)) {
            for (const channelDef of el) {
                f.call(thisArg, channelDef, channel);
            }
        }
        else {
            f.call(thisArg, el, channel);
        }
    }
}
function extension_encoding_reduce(mapping, f, init, thisArg) {
    if (!mapping) {
        return init;
    }
    return extension_util_keys(mapping).reduce((r, channel) => {
        const map = mapping[channel];
        if (extension_vega_util_module_isArray(map)) {
            return map.reduce((r1, channelDef) => {
                return f.call(thisArg, r1, channelDef, channel);
            }, r);
        }
        else {
            return f.call(thisArg, r, map, channel);
        }
    }, init);
}
/**
 * Returns list of path grouping fields for the given encoding
 */
function extension_pathGroupingFields(mark, encoding) {
    return extension_util_keys(encoding).reduce((details, channel) => {
        switch (channel) {
            // x, y, x2, y2, lat, long, lat1, long2, order, tooltip, href, aria label, cursor should not cause lines to group
            case extension_channel_X:
            case extension_channel_Y:
            case extension_HREF:
            case extension_DESCRIPTION:
            case extension_channel_URL:
            case extension_channel_X2:
            case extension_channel_Y2:
            case extension_XOFFSET:
            case extension_YOFFSET:
            case extension_THETA:
            case extension_THETA2:
            case extension_RADIUS:
            case extension_RADIUS2:
            case extension_TIME:
            // falls through
            case extension_LATITUDE:
            case extension_LONGITUDE:
            case extension_LATITUDE2:
            case extension_LONGITUDE2:
            // TODO: case 'cursor':
            // text, shape, shouldn't be a part of line/trail/area [falls through]
            case extension_TEXT:
            case extension_SHAPE:
            case extension_ANGLE:
            // falls through
            // tooltip fields should not be added to group by [falls through]
            case extension_TOOLTIP:
                return details;
            case extension_ORDER:
                // order should not group line / trail
                if (mark === 'line' || mark === 'trail') {
                    return details;
                }
            // but order should group area for stacking (falls through)
            case extension_DETAIL:
            case extension_KEY: {
                const channelDef = encoding[channel];
                if (extension_vega_util_module_isArray(channelDef) || extension_isFieldDef(channelDef)) {
                    for (const fieldDef of extension_vega_util_module_array(channelDef)) {
                        if (!fieldDef.aggregate) {
                            details.push(extension_vgField(fieldDef, {}));
                        }
                    }
                }
                return details;
            }
            case extension_channel_SIZE:
                if (mark === 'trail') {
                    // For trail, size should not group trail lines.
                    return details;
                }
            // For line, size should group lines.
            // falls through
            case extension_COLOR:
            case extension_FILL:
            case extension_STROKE:
            case extension_OPACITY:
            case extension_FILLOPACITY:
            case extension_STROKEOPACITY:
            case extension_STROKEDASH:
            case extension_STROKEWIDTH: {
                // TODO strokeDashOffset:
                // falls through
                const fieldDef = extension_getFieldDef(encoding[channel]);
                if (fieldDef && !fieldDef.aggregate) {
                    details.push(extension_vgField(fieldDef, {}));
                }
                return details;
            }
        }
    }, []);
}
//# sourceMappingURL=encoding.js.map
;// ../../node_modules/vega-lite/build/src/compositemark/common.js








function extension_filterTooltipWithAggregatedField(oldEncoding) {
    const { tooltip, ...filteredEncoding } = oldEncoding;
    if (!tooltip) {
        return { filteredEncoding };
    }
    let customTooltipWithAggregatedField;
    let customTooltipWithoutAggregatedField;
    if (extension_vega_util_module_isArray(tooltip)) {
        for (const t of tooltip) {
            if (t.aggregate) {
                if (!customTooltipWithAggregatedField) {
                    customTooltipWithAggregatedField = [];
                }
                customTooltipWithAggregatedField.push(t);
            }
            else {
                if (!customTooltipWithoutAggregatedField) {
                    customTooltipWithoutAggregatedField = [];
                }
                customTooltipWithoutAggregatedField.push(t);
            }
        }
        if (customTooltipWithAggregatedField) {
            filteredEncoding.tooltip = customTooltipWithAggregatedField;
        }
    }
    else {
        if (tooltip.aggregate) {
            filteredEncoding.tooltip = tooltip;
        }
        else {
            customTooltipWithoutAggregatedField = tooltip;
        }
    }
    if (extension_vega_util_module_isArray(customTooltipWithoutAggregatedField) && customTooltipWithoutAggregatedField.length === 1) {
        customTooltipWithoutAggregatedField = customTooltipWithoutAggregatedField[0];
    }
    return { customTooltipWithoutAggregatedField, filteredEncoding };
}
function extension_getCompositeMarkTooltip(tooltipSummary, continuousAxisChannelDef, encodingWithoutContinuousAxis, withFieldName = true) {
    if ('tooltip' in encodingWithoutContinuousAxis) {
        return { tooltip: encodingWithoutContinuousAxis.tooltip };
    }
    const fiveSummaryTooltip = tooltipSummary.map(({ fieldPrefix, titlePrefix }) => {
        const mainTitle = withFieldName ? ` of ${extension_getTitle(continuousAxisChannelDef)}` : '';
        return {
            field: fieldPrefix + continuousAxisChannelDef.field,
            type: continuousAxisChannelDef.type,
            title: extension_isSignalRef(titlePrefix) ? { signal: `${titlePrefix}"${escape(mainTitle)}"` } : titlePrefix + mainTitle
        };
    });
    const tooltipFieldDefs = extension_fieldDefs(encodingWithoutContinuousAxis).map(extension_toStringFieldDef);
    return {
        tooltip: [
            ...fiveSummaryTooltip,
            // need to cast because TextFieldDef supports fewer types of bin
            ...extension_unique(tooltipFieldDefs, extension_util_hash)
        ]
    };
}
function extension_getTitle(continuousAxisChannelDef) {
    const { title, field } = continuousAxisChannelDef;
    return extension_getFirstDefined(title, field);
}
function extension_makeCompositeAggregatePartFactory(compositeMarkDef, continuousAxis, continuousAxisChannelDef, sharedEncoding, compositeMarkConfig) {
    const { scale, axis } = continuousAxisChannelDef;
    return ({ partName, mark, positionPrefix, endPositionPrefix = undefined, extraEncoding = {} }) => {
        const title = extension_getTitle(continuousAxisChannelDef);
        return extension_partLayerMixins(compositeMarkDef, partName, compositeMarkConfig, {
            mark, // TODO better remove this method and just have mark as a parameter of the method
            encoding: {
                [continuousAxis]: {
                    field: `${positionPrefix}_${continuousAxisChannelDef.field}`,
                    type: continuousAxisChannelDef.type,
                    ...(title !== undefined ? { title } : {}),
                    ...(scale !== undefined ? { scale } : {}),
                    ...(axis !== undefined ? { axis } : {})
                },
                ...(extension_vega_util_module_isString(endPositionPrefix)
                    ? {
                        [`${continuousAxis}2`]: {
                            field: `${endPositionPrefix}_${continuousAxisChannelDef.field}`
                        }
                    }
                    : {}),
                ...sharedEncoding,
                ...extraEncoding
            }
        });
    };
}
function extension_partLayerMixins(markDef, part, compositeMarkConfig, partBaseSpec) {
    const { clip, color, opacity } = markDef;
    const mark = markDef.type;
    if (markDef[part] || (markDef[part] === undefined && compositeMarkConfig[part])) {
        return [
            {
                ...partBaseSpec,
                mark: {
                    ...compositeMarkConfig[part],
                    ...(clip ? { clip } : {}),
                    ...(color ? { color } : {}),
                    ...(opacity ? { opacity } : {}),
                    ...(extension_isMarkDef(partBaseSpec.mark) ? partBaseSpec.mark : { type: partBaseSpec.mark }),
                    style: `${mark}-${String(part)}`,
                    ...(extension_vega_util_module_isBoolean(markDef[part]) ? {} : markDef[part])
                }
            }
        ];
    }
    return [];
}
function extension_compositeMarkContinuousAxis(spec, orient, compositeMark) {
    const { encoding } = spec;
    const continuousAxis = orient === 'vertical' ? 'y' : 'x';
    const continuousAxisChannelDef = encoding[continuousAxis]; // Safe to cast because if x is not continuous fielddef, the orient would not be horizontal.
    const continuousAxisChannelDef2 = encoding[`${continuousAxis}2`];
    const continuousAxisChannelDefError = encoding[`${continuousAxis}Error`];
    const continuousAxisChannelDefError2 = encoding[`${continuousAxis}Error2`];
    return {
        continuousAxisChannelDef: extension_filterAggregateFromChannelDef(continuousAxisChannelDef, compositeMark),
        continuousAxisChannelDef2: extension_filterAggregateFromChannelDef(continuousAxisChannelDef2, compositeMark),
        continuousAxisChannelDefError: extension_filterAggregateFromChannelDef(continuousAxisChannelDefError, compositeMark),
        continuousAxisChannelDefError2: extension_filterAggregateFromChannelDef(continuousAxisChannelDefError2, compositeMark),
        continuousAxis
    };
}
function extension_filterAggregateFromChannelDef(continuousAxisChannelDef, compositeMark) {
    if (continuousAxisChannelDef?.aggregate) {
        const { aggregate, ...continuousAxisWithoutAggregate } = continuousAxisChannelDef;
        if (aggregate !== compositeMark) {
            extension_log_warn(extension_errorBarContinuousAxisHasCustomizedAggregate(aggregate, compositeMark));
        }
        return continuousAxisWithoutAggregate;
    }
    else {
        return continuousAxisChannelDef;
    }
}
function extension_compositeMarkOrient(spec, compositeMark) {
    const { mark, encoding } = spec;
    const { x, y } = encoding;
    if (extension_isMarkDef(mark) && mark.orient) {
        return mark.orient;
    }
    if (extension_isContinuousFieldOrDatumDef(x)) {
        // x is continuous
        if (extension_isContinuousFieldOrDatumDef(y)) {
            // both x and y are continuous
            const xAggregate = extension_isFieldDef(x) && x.aggregate;
            const yAggregate = extension_isFieldDef(y) && y.aggregate;
            if (!xAggregate && yAggregate === compositeMark) {
                return 'vertical';
            }
            else if (!yAggregate && xAggregate === compositeMark) {
                return 'horizontal';
            }
            else if (xAggregate === compositeMark && yAggregate === compositeMark) {
                throw new Error('Both x and y cannot have aggregate');
            }
            else {
                if (extension_isFieldOrDatumDefForTimeFormat(y) && !extension_isFieldOrDatumDefForTimeFormat(x)) {
                    // y is temporal but x is not
                    return 'horizontal';
                }
                // default orientation for two continuous
                return 'vertical';
            }
        }
        return 'horizontal';
    }
    else if (extension_isContinuousFieldOrDatumDef(y)) {
        // y is continuous but x is not
        return 'vertical';
    }
    else {
        // Neither x nor y is continuous.
        throw new Error(`Need a valid continuous axis for ${compositeMark}s`);
    }
}
//# sourceMappingURL=common.js.map
;// ../../node_modules/vega-lite/build/src/compositemark/boxplot.js








const extension_BOXPLOT = 'boxplot';
const extension_BOXPLOT_PARTS = ['box', 'median', 'outliers', 'rule', 'ticks'];
const extension_boxPlotNormalizer = new extension_CompositeMarkNormalizer(extension_BOXPLOT, extension_normalizeBoxPlot);
function extension_getBoxPlotType(extent) {
    if (extension_vega_util_module_isNumber(extent)) {
        return 'tukey';
    }
    // Ham: If we ever want to, we could add another extent syntax `{kIQR: number}` for the original [Q1-k*IQR, Q3+k*IQR] whisker and call this boxPlotType = `kIQR`. However, I'm not exposing this for now.
    return extent;
}
function extension_normalizeBoxPlot(spec, { config }) {
    // Need to initEncoding first so we can infer type
    spec = {
        ...spec,
        encoding: extension_normalizeEncoding(spec.encoding, config)
    };
    const { mark, encoding: _encoding, params, projection: _p, ...outerSpec } = spec;
    const markDef = extension_isMarkDef(mark) ? mark : { type: mark };
    // TODO(https://github.com/vega/vega-lite/issues/3702): add selection support
    if (params) {
        extension_log_warn(extension_selectionNotSupported('boxplot'));
    }
    const extent = markDef.extent ?? config.boxplot.extent;
    const sizeValue = extension_getMarkPropOrConfig('size', markDef, // TODO: https://github.com/vega/vega-lite/issues/6245
    config);
    const invalid = markDef.invalid;
    const boxPlotType = extension_getBoxPlotType(extent);
    const { bins, timeUnits, transform, continuousAxisChannelDef, continuousAxis, groupby, aggregate, encodingWithoutContinuousAxis, ticksOrient, boxOrient, customTooltipWithoutAggregatedField } = extension_boxParams(spec, extent, config);
    const aliasedFieldName = extension_removePathFromField(continuousAxisChannelDef.field);
    const { color, size, ...encodingWithoutSizeColorAndContinuousAxis } = encodingWithoutContinuousAxis;
    const makeBoxPlotPart = (sharedEncoding) => {
        return extension_makeCompositeAggregatePartFactory(markDef, continuousAxis, continuousAxisChannelDef, sharedEncoding, config.boxplot);
    };
    const makeBoxPlotExtent = makeBoxPlotPart(encodingWithoutSizeColorAndContinuousAxis);
    const makeBoxPlotBox = makeBoxPlotPart(encodingWithoutContinuousAxis);
    const defaultBoxColor = (extension_vega_util_module_isObject(config.boxplot.box) ? config.boxplot.box.color : config.mark.color) || '#4c78a8';
    const makeBoxPlotMidTick = makeBoxPlotPart({
        ...encodingWithoutSizeColorAndContinuousAxis,
        ...(size ? { size } : {}),
        color: {
            condition: {
                test: `${extension_accessWithDatumToUnescapedPath(`lower_box_${continuousAxisChannelDef.field}`)} >= ${extension_accessWithDatumToUnescapedPath(`upper_box_${continuousAxisChannelDef.field}`)}`,
                ...(color || { value: defaultBoxColor })
            }
        }
    });
    const fiveSummaryTooltipEncoding = extension_getCompositeMarkTooltip([
        { fieldPrefix: boxPlotType === 'min-max' ? 'upper_whisker_' : 'max_', titlePrefix: 'Max' },
        { fieldPrefix: 'upper_box_', titlePrefix: 'Q3' },
        { fieldPrefix: 'mid_box_', titlePrefix: 'Median' },
        { fieldPrefix: 'lower_box_', titlePrefix: 'Q1' },
        { fieldPrefix: boxPlotType === 'min-max' ? 'lower_whisker_' : 'min_', titlePrefix: 'Min' }
    ], continuousAxisChannelDef, encodingWithoutContinuousAxis);
    // ## Whisker Layers
    const endTick = { type: 'tick', color: 'black', opacity: 1, orient: ticksOrient, invalid, aria: false };
    const whiskerTooltipEncoding = boxPlotType === 'min-max'
        ? fiveSummaryTooltipEncoding // for min-max, show five-summary tooltip for whisker
        : // for tukey / k-IQR, just show upper/lower-whisker
            extension_getCompositeMarkTooltip([
                { fieldPrefix: 'upper_whisker_', titlePrefix: 'Upper Whisker' },
                { fieldPrefix: 'lower_whisker_', titlePrefix: 'Lower Whisker' }
            ], continuousAxisChannelDef, encodingWithoutContinuousAxis);
    const whiskerLayers = [
        ...makeBoxPlotExtent({
            partName: 'rule',
            mark: { type: 'rule', invalid, aria: false },
            positionPrefix: 'lower_whisker',
            endPositionPrefix: 'lower_box',
            extraEncoding: whiskerTooltipEncoding
        }),
        ...makeBoxPlotExtent({
            partName: 'rule',
            mark: { type: 'rule', invalid, aria: false },
            positionPrefix: 'upper_box',
            endPositionPrefix: 'upper_whisker',
            extraEncoding: whiskerTooltipEncoding
        }),
        ...makeBoxPlotExtent({
            partName: 'ticks',
            mark: endTick,
            positionPrefix: 'lower_whisker',
            extraEncoding: whiskerTooltipEncoding
        }),
        ...makeBoxPlotExtent({
            partName: 'ticks',
            mark: endTick,
            positionPrefix: 'upper_whisker',
            extraEncoding: whiskerTooltipEncoding
        })
    ];
    // ## Box Layers
    // TODO: support hiding certain mark parts
    const boxLayers = [
        ...(boxPlotType !== 'tukey' ? whiskerLayers : []),
        ...makeBoxPlotBox({
            partName: 'box',
            mark: {
                type: 'bar',
                ...(sizeValue ? { size: sizeValue } : {}),
                orient: boxOrient,
                invalid,
                ariaRoleDescription: 'box'
            },
            positionPrefix: 'lower_box',
            endPositionPrefix: 'upper_box',
            extraEncoding: fiveSummaryTooltipEncoding
        }),
        ...makeBoxPlotMidTick({
            partName: 'median',
            mark: {
                type: 'tick',
                invalid,
                ...(extension_vega_util_module_isObject(config.boxplot.median) && config.boxplot.median.color ? { color: config.boxplot.median.color } : {}),
                ...(sizeValue ? { size: sizeValue } : {}),
                orient: ticksOrient,
                aria: false
            },
            positionPrefix: 'mid_box',
            extraEncoding: fiveSummaryTooltipEncoding
        })
    ];
    if (boxPlotType === 'min-max') {
        return {
            ...outerSpec,
            transform: (outerSpec.transform ?? []).concat(transform),
            layer: boxLayers
        };
    }
    // Tukey Box Plot
    const lowerBoxExpr = extension_accessWithDatumToUnescapedPath(`lower_box_${continuousAxisChannelDef.field}`);
    const upperBoxExpr = extension_accessWithDatumToUnescapedPath(`upper_box_${continuousAxisChannelDef.field}`);
    const iqrExpr = `(${upperBoxExpr} - ${lowerBoxExpr})`;
    const lowerWhiskerExpr = `${lowerBoxExpr} - ${extent} * ${iqrExpr}`;
    const upperWhiskerExpr = `${upperBoxExpr} + ${extent} * ${iqrExpr}`;
    const fieldExpr = extension_accessWithDatumToUnescapedPath(continuousAxisChannelDef.field);
    const joinaggregateTransform = {
        joinaggregate: extension_boxParamsQuartiles(continuousAxisChannelDef.field),
        groupby
    };
    const filteredWhiskerSpec = {
        transform: [
            {
                filter: `(${lowerWhiskerExpr} <= ${fieldExpr}) && (${fieldExpr} <= ${upperWhiskerExpr})`
            },
            {
                aggregate: [
                    {
                        op: 'min',
                        field: continuousAxisChannelDef.field,
                        as: `lower_whisker_${aliasedFieldName}`
                    },
                    {
                        op: 'max',
                        field: continuousAxisChannelDef.field,
                        as: `upper_whisker_${aliasedFieldName}`
                    },
                    // preserve lower_box / upper_box
                    {
                        op: 'min',
                        field: `lower_box_${continuousAxisChannelDef.field}`,
                        as: `lower_box_${aliasedFieldName}`
                    },
                    {
                        op: 'max',
                        field: `upper_box_${continuousAxisChannelDef.field}`,
                        as: `upper_box_${aliasedFieldName}`
                    },
                    ...aggregate
                ],
                groupby
            }
        ],
        layer: whiskerLayers
    };
    const { tooltip, ...encodingWithoutSizeColorContinuousAxisAndTooltip } = encodingWithoutSizeColorAndContinuousAxis;
    const { scale, axis } = continuousAxisChannelDef;
    const title = extension_getTitle(continuousAxisChannelDef);
    const axisWithoutTitle = extension_omit(axis, ['title']);
    const outlierLayersMixins = extension_partLayerMixins(markDef, 'outliers', config.boxplot, {
        transform: [{ filter: `(${fieldExpr} < ${lowerWhiskerExpr}) || (${fieldExpr} > ${upperWhiskerExpr})` }],
        mark: 'point',
        encoding: {
            [continuousAxis]: {
                field: continuousAxisChannelDef.field,
                type: continuousAxisChannelDef.type,
                ...(title !== undefined ? { title } : {}),
                ...(scale !== undefined ? { scale } : {}),
                // add axis without title since we already added the title above
                ...(extension_isEmpty(axisWithoutTitle) ? {} : { axis: axisWithoutTitle })
            },
            ...encodingWithoutSizeColorContinuousAxisAndTooltip,
            ...(color ? { color } : {}),
            ...(customTooltipWithoutAggregatedField ? { tooltip: customTooltipWithoutAggregatedField } : {})
        }
    })[0];
    let filteredLayersMixins;
    const filteredLayersMixinsTransforms = [...bins, ...timeUnits, joinaggregateTransform];
    if (outlierLayersMixins) {
        filteredLayersMixins = {
            transform: filteredLayersMixinsTransforms,
            layer: [outlierLayersMixins, filteredWhiskerSpec]
        };
    }
    else {
        filteredLayersMixins = filteredWhiskerSpec;
        filteredLayersMixins.transform.unshift(...filteredLayersMixinsTransforms);
    }
    return {
        ...outerSpec,
        layer: [
            filteredLayersMixins,
            {
                // boxplot
                transform,
                layer: boxLayers
            }
        ]
    };
}
function extension_boxParamsQuartiles(continousAxisField) {
    const aliasedFieldName = extension_removePathFromField(continousAxisField);
    return [
        {
            op: 'q1',
            field: continousAxisField,
            as: `lower_box_${aliasedFieldName}`
        },
        {
            op: 'q3',
            field: continousAxisField,
            as: `upper_box_${aliasedFieldName}`
        }
    ];
}
function extension_boxParams(spec, extent, config) {
    const orient = extension_compositeMarkOrient(spec, extension_BOXPLOT);
    const { continuousAxisChannelDef, continuousAxis } = extension_compositeMarkContinuousAxis(spec, orient, extension_BOXPLOT);
    const continuousFieldName = continuousAxisChannelDef.field;
    const aliasedFieldName = extension_removePathFromField(continuousFieldName);
    const boxPlotType = extension_getBoxPlotType(extent);
    const boxplotSpecificAggregate = [
        ...extension_boxParamsQuartiles(continuousFieldName),
        {
            op: 'median',
            field: continuousFieldName,
            as: `mid_box_${aliasedFieldName}`
        },
        {
            op: 'min',
            field: continuousFieldName,
            as: (boxPlotType === 'min-max' ? 'lower_whisker_' : 'min_') + aliasedFieldName
        },
        {
            op: 'max',
            field: continuousFieldName,
            as: (boxPlotType === 'min-max' ? 'upper_whisker_' : 'max_') + aliasedFieldName
        }
    ];
    const postAggregateCalculates = boxPlotType === 'min-max' || boxPlotType === 'tukey'
        ? []
        : [
            // This is for the  original k-IQR, which we do not expose
            {
                calculate: `${extension_accessWithDatumToUnescapedPath(`upper_box_${aliasedFieldName}`)} - ${extension_accessWithDatumToUnescapedPath(`lower_box_${aliasedFieldName}`)}`,
                as: `iqr_${aliasedFieldName}`
            },
            {
                calculate: `min(${extension_accessWithDatumToUnescapedPath(`upper_box_${aliasedFieldName}`)} + ${extension_accessWithDatumToUnescapedPath(`iqr_${aliasedFieldName}`)} * ${extent}, ${extension_accessWithDatumToUnescapedPath(`max_${aliasedFieldName}`)})`,
                as: `upper_whisker_${aliasedFieldName}`
            },
            {
                calculate: `max(${extension_accessWithDatumToUnescapedPath(`lower_box_${aliasedFieldName}`)} - ${extension_accessWithDatumToUnescapedPath(`iqr_${aliasedFieldName}`)} * ${extent}, ${extension_accessWithDatumToUnescapedPath(`min_${aliasedFieldName}`)})`,
                as: `lower_whisker_${aliasedFieldName}`
            }
        ];
    const { [continuousAxis]: oldContinuousAxisChannelDef, ...oldEncodingWithoutContinuousAxis } = spec.encoding;
    const { customTooltipWithoutAggregatedField, filteredEncoding } = extension_filterTooltipWithAggregatedField(oldEncodingWithoutContinuousAxis);
    const { bins, timeUnits, aggregate, groupby, encoding: encodingWithoutContinuousAxis } = extension_extractTransformsFromEncoding(filteredEncoding, config);
    const ticksOrient = orient === 'vertical' ? 'horizontal' : 'vertical';
    const boxOrient = orient;
    const transform = [
        ...bins,
        ...timeUnits,
        {
            aggregate: [...aggregate, ...boxplotSpecificAggregate],
            groupby
        },
        ...postAggregateCalculates
    ];
    return {
        bins,
        timeUnits,
        transform,
        groupby,
        aggregate,
        continuousAxisChannelDef,
        continuousAxis,
        encodingWithoutContinuousAxis,
        ticksOrient,
        boxOrient,
        customTooltipWithoutAggregatedField
    };
}
//# sourceMappingURL=boxplot.js.map
;// ../../node_modules/vega-lite/build/src/compositemark/errorbar.js







const extension_ERRORBAR = 'errorbar';
const extension_ERRORBAR_PARTS = ['ticks', 'rule'];
const extension_errorBarNormalizer = new extension_CompositeMarkNormalizer(extension_ERRORBAR, extension_normalizeErrorBar);
function extension_normalizeErrorBar(spec, { config }) {
    // Need to initEncoding first so we can infer type
    spec = {
        ...spec,
        encoding: extension_normalizeEncoding(spec.encoding, config)
    };
    const { transform, continuousAxisChannelDef, continuousAxis, encodingWithoutContinuousAxis, ticksOrient, markDef, outerSpec, tooltipEncoding } = extension_errorBarParams(spec, extension_ERRORBAR, config);
    delete encodingWithoutContinuousAxis.size;
    const makeErrorBarPart = extension_makeCompositeAggregatePartFactory(markDef, continuousAxis, continuousAxisChannelDef, encodingWithoutContinuousAxis, config.errorbar);
    const thickness = markDef.thickness;
    const size = markDef.size;
    const tick = {
        type: 'tick',
        orient: ticksOrient,
        aria: false,
        ...(thickness !== undefined ? { thickness } : {}),
        ...(size !== undefined ? { size } : {})
    };
    const layer = [
        ...makeErrorBarPart({
            partName: 'ticks',
            mark: tick,
            positionPrefix: 'lower',
            extraEncoding: tooltipEncoding
        }),
        ...makeErrorBarPart({
            partName: 'ticks',
            mark: tick,
            positionPrefix: 'upper',
            extraEncoding: tooltipEncoding
        }),
        ...makeErrorBarPart({
            partName: 'rule',
            mark: {
                type: 'rule',
                ariaRoleDescription: 'errorbar',
                ...(thickness !== undefined ? { size: thickness } : {})
            },
            positionPrefix: 'lower',
            endPositionPrefix: 'upper',
            extraEncoding: tooltipEncoding
        })
    ];
    return {
        ...outerSpec,
        transform,
        ...(layer.length > 1 ? { layer } : { ...layer[0] })
    };
}
function extension_errorBarOrientAndInputType(spec, compositeMark) {
    const { encoding } = spec;
    if (extension_errorBarIsInputTypeRaw(encoding)) {
        return {
            orient: extension_compositeMarkOrient(spec, compositeMark),
            inputType: 'raw'
        };
    }
    const isTypeAggregatedUpperLower = extension_errorBarIsInputTypeAggregatedUpperLower(encoding);
    const isTypeAggregatedError = extension_errorBarIsInputTypeAggregatedError(encoding);
    const x = encoding.x;
    const y = encoding.y;
    if (isTypeAggregatedUpperLower) {
        // type is aggregated-upper-lower
        if (isTypeAggregatedError) {
            throw new Error(`${compositeMark} cannot be both type aggregated-upper-lower and aggregated-error`);
        }
        const x2 = encoding.x2;
        const y2 = encoding.y2;
        if (extension_isFieldOrDatumDef(x2) && extension_isFieldOrDatumDef(y2)) {
            // having both x, x2 and y, y2
            throw new Error(`${compositeMark} cannot have both x2 and y2`);
        }
        else if (extension_isFieldOrDatumDef(x2)) {
            if (extension_isContinuousFieldOrDatumDef(x)) {
                // having x, x2 quantitative and field y, y2 are not specified
                return { orient: 'horizontal', inputType: 'aggregated-upper-lower' };
            }
            else {
                // having x, x2 that are not both quantitative
                throw new Error(`Both x and x2 have to be quantitative in ${compositeMark}`);
            }
        }
        else if (extension_isFieldOrDatumDef(y2)) {
            // y2 is a FieldDef
            if (extension_isContinuousFieldOrDatumDef(y)) {
                // having y, y2 quantitative and field x, x2 are not specified
                return { orient: 'vertical', inputType: 'aggregated-upper-lower' };
            }
            else {
                // having y, y2 that are not both quantitative
                throw new Error(`Both y and y2 have to be quantitative in ${compositeMark}`);
            }
        }
        throw new Error('No ranged axis');
    }
    else {
        // type is aggregated-error
        const xError = encoding.xError;
        const xError2 = encoding.xError2;
        const yError = encoding.yError;
        const yError2 = encoding.yError2;
        if (extension_isFieldOrDatumDef(xError2) && !extension_isFieldOrDatumDef(xError)) {
            // having xError2 without xError
            throw new Error(`${compositeMark} cannot have xError2 without xError`);
        }
        if (extension_isFieldOrDatumDef(yError2) && !extension_isFieldOrDatumDef(yError)) {
            // having yError2 without yError
            throw new Error(`${compositeMark} cannot have yError2 without yError`);
        }
        if (extension_isFieldOrDatumDef(xError) && extension_isFieldOrDatumDef(yError)) {
            // having both xError and yError
            throw new Error(`${compositeMark} cannot have both xError and yError with both are quantiative`);
        }
        else if (extension_isFieldOrDatumDef(xError)) {
            if (extension_isContinuousFieldOrDatumDef(x)) {
                // having x and xError that are all quantitative
                return { orient: 'horizontal', inputType: 'aggregated-error' };
            }
            else {
                // having x, xError, and xError2 that are not all quantitative
                throw new Error('All x, xError, and xError2 (if exist) have to be quantitative');
            }
        }
        else if (extension_isFieldOrDatumDef(yError)) {
            if (extension_isContinuousFieldOrDatumDef(y)) {
                // having y and yError that are all quantitative
                return { orient: 'vertical', inputType: 'aggregated-error' };
            }
            else {
                // having y, yError, and yError2 that are not all quantitative
                throw new Error('All y, yError, and yError2 (if exist) have to be quantitative');
            }
        }
        throw new Error('No ranged axis');
    }
}
function extension_errorBarIsInputTypeRaw(encoding) {
    return ((extension_isFieldOrDatumDef(encoding.x) || extension_isFieldOrDatumDef(encoding.y)) &&
        !extension_isFieldOrDatumDef(encoding.x2) &&
        !extension_isFieldOrDatumDef(encoding.y2) &&
        !extension_isFieldOrDatumDef(encoding.xError) &&
        !extension_isFieldOrDatumDef(encoding.xError2) &&
        !extension_isFieldOrDatumDef(encoding.yError) &&
        !extension_isFieldOrDatumDef(encoding.yError2));
}
function extension_errorBarIsInputTypeAggregatedUpperLower(encoding) {
    return extension_isFieldOrDatumDef(encoding.x2) || extension_isFieldOrDatumDef(encoding.y2);
}
function extension_errorBarIsInputTypeAggregatedError(encoding) {
    return (extension_isFieldOrDatumDef(encoding.xError) ||
        extension_isFieldOrDatumDef(encoding.xError2) ||
        extension_isFieldOrDatumDef(encoding.yError) ||
        extension_isFieldOrDatumDef(encoding.yError2));
}
function extension_errorBarParams(spec, compositeMark, config) {
    // TODO: use selection
    const { mark, encoding, params, projection: _p, ...outerSpec } = spec;
    const markDef = extension_isMarkDef(mark) ? mark : { type: mark };
    // TODO(https://github.com/vega/vega-lite/issues/3702): add selection support
    if (params) {
        extension_log_warn(extension_selectionNotSupported(compositeMark));
    }
    const { orient, inputType } = extension_errorBarOrientAndInputType(spec, compositeMark);
    const { continuousAxisChannelDef, continuousAxisChannelDef2, continuousAxisChannelDefError, continuousAxisChannelDefError2, continuousAxis } = extension_compositeMarkContinuousAxis(spec, orient, compositeMark);
    const { errorBarSpecificAggregate, postAggregateCalculates, tooltipSummary, tooltipTitleWithFieldName } = extension_errorBarAggregationAndCalculation(markDef, continuousAxisChannelDef, continuousAxisChannelDef2, continuousAxisChannelDefError, continuousAxisChannelDefError2, inputType, compositeMark, config);
    const { [continuousAxis]: oldContinuousAxisChannelDef, [continuousAxis === 'x' ? 'x2' : 'y2']: oldContinuousAxisChannelDef2, [continuousAxis === 'x' ? 'xError' : 'yError']: oldContinuousAxisChannelDefError, [continuousAxis === 'x' ? 'xError2' : 'yError2']: oldContinuousAxisChannelDefError2, ...oldEncodingWithoutContinuousAxis } = encoding;
    const { bins, timeUnits, aggregate: oldAggregate, groupby: oldGroupBy, encoding: encodingWithoutContinuousAxis } = extension_extractTransformsFromEncoding(oldEncodingWithoutContinuousAxis, config);
    const aggregate = [...oldAggregate, ...errorBarSpecificAggregate];
    const groupby = inputType !== 'raw' ? [] : oldGroupBy;
    const tooltipEncoding = extension_getCompositeMarkTooltip(tooltipSummary, continuousAxisChannelDef, encodingWithoutContinuousAxis, tooltipTitleWithFieldName);
    return {
        transform: [
            ...(outerSpec.transform ?? []),
            ...bins,
            ...timeUnits,
            ...(aggregate.length === 0 ? [] : [{ aggregate, groupby }]),
            ...postAggregateCalculates
        ],
        groupby,
        continuousAxisChannelDef,
        continuousAxis,
        encodingWithoutContinuousAxis,
        ticksOrient: orient === 'vertical' ? 'horizontal' : 'vertical',
        markDef,
        outerSpec,
        tooltipEncoding
    };
}
function extension_errorBarAggregationAndCalculation(markDef, continuousAxisChannelDef, continuousAxisChannelDef2, continuousAxisChannelDefError, continuousAxisChannelDefError2, inputType, compositeMark, config) {
    let errorBarSpecificAggregate = [];
    let postAggregateCalculates = [];
    const continuousFieldName = continuousAxisChannelDef.field;
    let tooltipSummary;
    let tooltipTitleWithFieldName = false;
    if (inputType === 'raw') {
        const center = markDef.center
            ? markDef.center
            : markDef.extent
                ? markDef.extent === 'iqr'
                    ? 'median'
                    : 'mean'
                : config.errorbar.center;
        const extent = markDef.extent ? markDef.extent : center === 'mean' ? 'stderr' : 'iqr';
        if ((center === 'median') !== (extent === 'iqr')) {
            extension_log_warn(extension_errorBarCenterIsUsedWithWrongExtent(center, extent, compositeMark));
        }
        if (extent === 'stderr' || extent === 'stdev') {
            errorBarSpecificAggregate = [
                { op: extent, field: continuousFieldName, as: `extent_${continuousFieldName}` },
                { op: center, field: continuousFieldName, as: `center_${continuousFieldName}` }
            ];
            postAggregateCalculates = [
                {
                    calculate: `${extension_accessWithDatumToUnescapedPath(`center_${continuousFieldName}`)} + ${extension_accessWithDatumToUnescapedPath(`extent_${continuousFieldName}`)}`,
                    as: `upper_${continuousFieldName}`
                },
                {
                    calculate: `${extension_accessWithDatumToUnescapedPath(`center_${continuousFieldName}`)} - ${extension_accessWithDatumToUnescapedPath(`extent_${continuousFieldName}`)}`,
                    as: `lower_${continuousFieldName}`
                }
            ];
            tooltipSummary = [
                { fieldPrefix: 'center_', titlePrefix: extension_titleCase(center) },
                { fieldPrefix: 'upper_', titlePrefix: extension_getTitlePrefix(center, extent, '+') },
                { fieldPrefix: 'lower_', titlePrefix: extension_getTitlePrefix(center, extent, '-') }
            ];
            tooltipTitleWithFieldName = true;
        }
        else {
            let centerOp;
            let lowerExtentOp;
            let upperExtentOp;
            if (extent === 'ci') {
                centerOp = 'mean';
                lowerExtentOp = 'ci0';
                upperExtentOp = 'ci1';
            }
            else {
                centerOp = 'median';
                lowerExtentOp = 'q1';
                upperExtentOp = 'q3';
            }
            errorBarSpecificAggregate = [
                { op: lowerExtentOp, field: continuousFieldName, as: `lower_${continuousFieldName}` },
                { op: upperExtentOp, field: continuousFieldName, as: `upper_${continuousFieldName}` },
                { op: centerOp, field: continuousFieldName, as: `center_${continuousFieldName}` }
            ];
            tooltipSummary = [
                {
                    fieldPrefix: 'upper_',
                    titlePrefix: extension_channeldef_title({ field: continuousFieldName, aggregate: upperExtentOp, type: 'quantitative' }, config, {
                        allowDisabling: false
                    })
                },
                {
                    fieldPrefix: 'lower_',
                    titlePrefix: extension_channeldef_title({ field: continuousFieldName, aggregate: lowerExtentOp, type: 'quantitative' }, config, {
                        allowDisabling: false
                    })
                },
                {
                    fieldPrefix: 'center_',
                    titlePrefix: extension_channeldef_title({ field: continuousFieldName, aggregate: centerOp, type: 'quantitative' }, config, {
                        allowDisabling: false
                    })
                }
            ];
        }
    }
    else {
        if (markDef.center || markDef.extent) {
            extension_log_warn(extension_errorBarCenterAndExtentAreNotNeeded(markDef.center, markDef.extent));
        }
        if (inputType === 'aggregated-upper-lower') {
            tooltipSummary = [];
            postAggregateCalculates = [
                {
                    calculate: extension_accessWithDatumToUnescapedPath(continuousAxisChannelDef2.field),
                    as: `upper_${continuousFieldName}`
                },
                { calculate: extension_accessWithDatumToUnescapedPath(continuousFieldName), as: `lower_${continuousFieldName}` }
            ];
        }
        else if (inputType === 'aggregated-error') {
            tooltipSummary = [{ fieldPrefix: '', titlePrefix: continuousFieldName }];
            postAggregateCalculates = [
                {
                    calculate: `${extension_accessWithDatumToUnescapedPath(continuousFieldName)} + ${extension_accessWithDatumToUnescapedPath(continuousAxisChannelDefError.field)}`,
                    as: `upper_${continuousFieldName}`
                }
            ];
            if (continuousAxisChannelDefError2) {
                postAggregateCalculates.push({
                    calculate: `${extension_accessWithDatumToUnescapedPath(continuousFieldName)} + ${extension_accessWithDatumToUnescapedPath(continuousAxisChannelDefError2.field)}`,
                    as: `lower_${continuousFieldName}`
                });
            }
            else {
                postAggregateCalculates.push({
                    calculate: `${extension_accessWithDatumToUnescapedPath(continuousFieldName)} - ${extension_accessWithDatumToUnescapedPath(continuousAxisChannelDefError.field)}`,
                    as: `lower_${continuousFieldName}`
                });
            }
        }
        for (const postAggregateCalculate of postAggregateCalculates) {
            tooltipSummary.push({
                fieldPrefix: postAggregateCalculate.as.substring(0, 6),
                titlePrefix: extension_replaceAll(extension_replaceAll(postAggregateCalculate.calculate, "datum['", ''), "']", '')
            });
        }
    }
    return { postAggregateCalculates, errorBarSpecificAggregate, tooltipSummary, tooltipTitleWithFieldName };
}
function extension_getTitlePrefix(center, extent, operation) {
    return `${extension_titleCase(center)} ${operation} ${extent}`;
}
//# sourceMappingURL=errorbar.js.map
;// ../../node_modules/vega-lite/build/src/compositemark/errorband.js





const extension_ERRORBAND = 'errorband';
const extension_ERRORBAND_PARTS = ['band', 'borders'];
const extension_errorBandNormalizer = new extension_CompositeMarkNormalizer(extension_ERRORBAND, extension_normalizeErrorBand);
function extension_normalizeErrorBand(spec, { config }) {
    // Need to initEncoding first so we can infer type
    spec = {
        ...spec,
        encoding: extension_normalizeEncoding(spec.encoding, config)
    };
    const { transform, continuousAxisChannelDef, continuousAxis, encodingWithoutContinuousAxis, markDef, outerSpec, tooltipEncoding } = extension_errorBarParams(spec, extension_ERRORBAND, config);
    const errorBandDef = markDef;
    const makeErrorBandPart = extension_makeCompositeAggregatePartFactory(errorBandDef, continuousAxis, continuousAxisChannelDef, encodingWithoutContinuousAxis, config.errorband);
    const is2D = spec.encoding.x !== undefined && spec.encoding.y !== undefined;
    let bandMark = { type: is2D ? 'area' : 'rect' };
    let bordersMark = { type: is2D ? 'line' : 'rule' };
    const interpolate = {
        ...(errorBandDef.interpolate ? { interpolate: errorBandDef.interpolate } : {}),
        ...(errorBandDef.tension && errorBandDef.interpolate ? { tension: errorBandDef.tension } : {})
    };
    if (is2D) {
        bandMark = {
            ...bandMark,
            ...interpolate,
            ariaRoleDescription: 'errorband'
        };
        bordersMark = {
            ...bordersMark,
            ...interpolate,
            aria: false
        };
    }
    else if (errorBandDef.interpolate) {
        extension_log_warn(extension_errorBand1DNotSupport('interpolate'));
    }
    else if (errorBandDef.tension) {
        extension_log_warn(extension_errorBand1DNotSupport('tension'));
    }
    return {
        ...outerSpec,
        transform,
        layer: [
            ...makeErrorBandPart({
                partName: 'band',
                mark: bandMark,
                positionPrefix: 'lower',
                endPositionPrefix: 'upper',
                extraEncoding: tooltipEncoding
            }),
            ...makeErrorBandPart({
                partName: 'borders',
                mark: bordersMark,
                positionPrefix: 'lower',
                extraEncoding: tooltipEncoding
            }),
            ...makeErrorBandPart({
                partName: 'borders',
                mark: bordersMark,
                positionPrefix: 'upper',
                extraEncoding: tooltipEncoding
            })
        ]
    };
}
//# sourceMappingURL=errorband.js.map
;// ../../node_modules/vega-lite/build/src/compositemark/index.js





/**
 * Registry index for all composite mark's normalizer
 */
const extension_compositeMarkRegistry = {};
function extension_compositemark_add(mark, run, parts) {
    const normalizer = new extension_CompositeMarkNormalizer(mark, run);
    extension_compositeMarkRegistry[mark] = { normalizer, parts };
}
function extension_compositemark_remove(mark) {
    delete extension_compositeMarkRegistry[mark];
}
function extension_getAllCompositeMarks() {
    return extension_util_keys(extension_compositeMarkRegistry);
}
extension_compositemark_add(extension_BOXPLOT, extension_normalizeBoxPlot, extension_BOXPLOT_PARTS);
extension_compositemark_add(extension_ERRORBAR, extension_normalizeErrorBar, extension_ERRORBAR_PARTS);
extension_compositemark_add(extension_ERRORBAND, extension_normalizeErrorBand, extension_ERRORBAND_PARTS);
//# sourceMappingURL=index.js.map
;// ../../node_modules/vega-lite/build/src/guide.js
const extension_VL_ONLY_LEGEND_CONFIG = [
    'gradientHorizontalMaxLength',
    'gradientHorizontalMinLength',
    'gradientVerticalMaxLength',
    'gradientVerticalMinLength',
    'unselectedOpacity'
];
//# sourceMappingURL=guide.js.map
;// ../../node_modules/vega-lite/build/src/header.js

const extension_HEADER_TITLE_PROPERTIES_MAP = {
    titleAlign: 'align',
    titleAnchor: 'anchor',
    titleAngle: 'angle',
    titleBaseline: 'baseline',
    titleColor: 'color',
    titleFont: 'font',
    titleFontSize: 'fontSize',
    titleFontStyle: 'fontStyle',
    titleFontWeight: 'fontWeight',
    titleLimit: 'limit',
    titleLineHeight: 'lineHeight',
    titleOrient: 'orient',
    titlePadding: 'offset'
};
const extension_HEADER_LABEL_PROPERTIES_MAP = {
    labelAlign: 'align',
    labelAnchor: 'anchor',
    labelAngle: 'angle',
    labelBaseline: 'baseline',
    labelColor: 'color',
    labelFont: 'font',
    labelFontSize: 'fontSize',
    labelFontStyle: 'fontStyle',
    labelFontWeight: 'fontWeight',
    labelLimit: 'limit',
    labelLineHeight: 'lineHeight',
    labelOrient: 'orient',
    labelPadding: 'offset'
};
const extension_HEADER_TITLE_PROPERTIES = extension_util_keys(extension_HEADER_TITLE_PROPERTIES_MAP);
const extension_HEADER_LABEL_PROPERTIES = extension_util_keys(extension_HEADER_LABEL_PROPERTIES_MAP);
const extension_HEADER_CONFIGS_INDEX = {
    header: 1,
    headerRow: 1,
    headerColumn: 1,
    headerFacet: 1
};
const extension_HEADER_CONFIGS = extension_util_keys(extension_HEADER_CONFIGS_INDEX);
//# sourceMappingURL=header.js.map
;// ../../node_modules/vega-lite/build/src/legend.js

const extension_LEGEND_SCALE_CHANNELS = [
    'size',
    'shape',
    'fill',
    'stroke',
    'strokeDash',
    'strokeWidth',
    'opacity'
];
const extension_defaultLegendConfig = {
    gradientHorizontalMaxLength: 200,
    gradientHorizontalMinLength: 100,
    gradientVerticalMaxLength: 200,
    gradientVerticalMinLength: 64, // This is Vega's minimum.
    unselectedOpacity: 0.35
};
const extension_COMMON_LEGEND_PROPERTY_INDEX = {
    aria: 1,
    clipHeight: 1,
    columnPadding: 1,
    columns: 1,
    cornerRadius: 1,
    description: 1,
    direction: 1,
    fillColor: 1,
    format: 1,
    formatType: 1,
    gradientLength: 1,
    gradientOpacity: 1,
    gradientStrokeColor: 1,
    gradientStrokeWidth: 1,
    gradientThickness: 1,
    gridAlign: 1,
    labelAlign: 1,
    labelBaseline: 1,
    labelColor: 1,
    labelFont: 1,
    labelFontSize: 1,
    labelFontStyle: 1,
    labelFontWeight: 1,
    labelLimit: 1,
    labelOffset: 1,
    labelOpacity: 1,
    labelOverlap: 1,
    labelPadding: 1,
    labelSeparation: 1,
    legendX: 1,
    legendY: 1,
    offset: 1,
    orient: 1,
    padding: 1,
    rowPadding: 1,
    strokeColor: 1,
    symbolDash: 1,
    symbolDashOffset: 1,
    symbolFillColor: 1,
    symbolLimit: 1,
    symbolOffset: 1,
    symbolOpacity: 1,
    symbolSize: 1,
    symbolStrokeColor: 1,
    symbolStrokeWidth: 1,
    symbolType: 1,
    tickCount: 1,
    tickMinStep: 1,
    title: 1,
    titleAlign: 1,
    titleAnchor: 1,
    titleBaseline: 1,
    titleColor: 1,
    titleFont: 1,
    titleFontSize: 1,
    titleFontStyle: 1,
    titleFontWeight: 1,
    titleLimit: 1,
    titleLineHeight: 1,
    titleOpacity: 1,
    titleOrient: 1,
    titlePadding: 1,
    type: 1,
    values: 1,
    zindex: 1
};
const extension_LEGEND_PROPERTIES = extension_util_keys(extension_COMMON_LEGEND_PROPERTY_INDEX);
//# sourceMappingURL=legend.js.map
;// ../../node_modules/vega-lite/build/src/selection.js

const extension_SELECTION_ID = '_vgsid_';
const extension_defaultConfig = {
    point: {
        on: 'click',
        fields: [extension_SELECTION_ID],
        toggle: 'event.shiftKey',
        resolve: 'global',
        clear: 'dblclick'
    },
    interval: {
        on: '[pointerdown, window:pointerup] > window:pointermove!',
        encodings: ['x', 'y'],
        translate: '[pointerdown, window:pointerup] > window:pointermove!',
        zoom: 'wheel!',
        mark: { fill: '#333', fillOpacity: 0.125, stroke: 'white' },
        resolve: 'global',
        clear: 'dblclick'
    }
};
function extension_isLegendBinding(bind) {
    return bind === 'legend' || !!bind?.legend;
}
function extension_isLegendStreamBinding(bind) {
    return extension_isLegendBinding(bind) && extension_vega_util_module_isObject(bind);
}
function extension_isSelectionParameter(param) {
    return !!param?.['select'];
}
//# sourceMappingURL=selection.js.map
;// ../../node_modules/vega-lite/build/src/parameter.js

function extension_assembleParameterSignals(params) {
    const signals = [];
    for (const param of params || []) {
        // Selection parameters are handled separately via assembleSelectionTopLevelSignals
        // and assembleSignals methods registered on the Model.
        if (extension_isSelectionParameter(param))
            continue;
        const { expr, bind, ...rest } = param;
        if (bind && expr) {
            // Vega's InitSignal -- apply expr to "init"
            const signal = {
                ...rest,
                bind,
                init: expr
            };
            signals.push(signal);
        }
        else {
            const signal = {
                ...rest,
                ...(expr ? { update: expr } : {}),
                ...(bind ? { bind } : {})
            };
            signals.push(signal);
        }
    }
    return signals;
}
//# sourceMappingURL=parameter.js.map
;// ../../node_modules/vega-lite/build/src/spec/concat.js

function extension_isAnyConcatSpec(spec) {
    return extension_isVConcatSpec(spec) || extension_isHConcatSpec(spec) || extension_isConcatSpec(spec);
}
function extension_isConcatSpec(spec) {
    return extension_util_hasProperty(spec, 'concat');
}
function extension_isVConcatSpec(spec) {
    return extension_util_hasProperty(spec, 'vconcat');
}
function extension_isHConcatSpec(spec) {
    return extension_util_hasProperty(spec, 'hconcat');
}
//# sourceMappingURL=concat.js.map
;// ../../node_modules/vega-lite/build/src/spec/base.js




function extension_getStepFor({ step, offsetIsDiscrete }) {
    if (offsetIsDiscrete) {
        return step.for ?? 'offset';
    }
    else {
        return 'position';
    }
}
function extension_isStep(size) {
    return extension_util_hasProperty(size, 'step');
}
function extension_isFrameMixins(o) {
    return extension_util_hasProperty(o, 'view') || extension_util_hasProperty(o, 'width') || extension_util_hasProperty(o, 'height');
}
const extension_DEFAULT_SPACING = 20;
const extension_COMPOSITION_LAYOUT_INDEX = {
    align: 1,
    bounds: 1,
    center: 1,
    columns: 1,
    spacing: 1
};
const extension_COMPOSITION_LAYOUT_PROPERTIES = extension_util_keys(extension_COMPOSITION_LAYOUT_INDEX);
function extension_extractCompositionLayout(spec, specType, config) {
    const compositionConfig = config[specType];
    const layout = {};
    // Apply config first
    const { spacing: spacingConfig, columns } = compositionConfig;
    if (spacingConfig !== undefined) {
        layout.spacing = spacingConfig;
    }
    if (columns !== undefined) {
        if ((extension_isFacetSpec(spec) && !extension_isFacetMapping(spec.facet)) || extension_isConcatSpec(spec)) {
            layout.columns = columns;
        }
    }
    if (extension_isVConcatSpec(spec)) {
        layout.columns = 1;
    }
    // Then copy properties from the spec
    for (const prop of extension_COMPOSITION_LAYOUT_PROPERTIES) {
        if (spec[prop] !== undefined) {
            if (prop === 'spacing') {
                const spacing = spec[prop];
                layout[prop] = extension_vega_util_module_isNumber(spacing)
                    ? spacing
                    : {
                        row: spacing.row ?? spacingConfig,
                        column: spacing.column ?? spacingConfig
                    };
            }
            else {
                layout[prop] = spec[prop];
            }
        }
    }
    return layout;
}
//# sourceMappingURL=base.js.map
;// ../../node_modules/vega-lite/build/src/config.js
















function extension_getViewConfigContinuousSize(viewConfig, channel) {
    return viewConfig[channel] ?? viewConfig[channel === 'width' ? 'continuousWidth' : 'continuousHeight']; // get width/height for backwards compatibility
}
function extension_getViewConfigDiscreteStep(viewConfig, channel) {
    const size = extension_getViewConfigDiscreteSize(viewConfig, channel);
    return extension_isStep(size) ? size.step : extension_DEFAULT_STEP;
}
function extension_getViewConfigDiscreteSize(viewConfig, channel) {
    const size = viewConfig[channel] ?? viewConfig[channel === 'width' ? 'discreteWidth' : 'discreteHeight']; // get width/height for backwards compatibility
    return extension_getFirstDefined(size, { step: viewConfig.step });
}
const extension_DEFAULT_STEP = 20;
const extension_defaultViewConfig = {
    continuousWidth: 200,
    continuousHeight: 200,
    step: extension_DEFAULT_STEP
};
function extension_isVgScheme(rangeScheme) {
    return hasProperty(rangeScheme, 'scheme');
}
const extension_config_defaultConfig = {
    background: 'white',
    padding: 5,
    timeFormat: '%b %d, %Y',
    countTitle: 'Count of Records',
    view: extension_defaultViewConfig,
    mark: extension_defaultMarkConfig,
    arc: {},
    area: {},
    bar: extension_defaultBarConfig,
    circle: {},
    geoshape: {},
    image: {},
    line: {},
    point: {},
    rect: extension_defaultRectConfig,
    rule: { color: 'black' }, // Need this to override default color in mark config
    square: {},
    text: { color: 'black' }, // Need this to override default color in mark config
    tick: extension_defaultTickConfig,
    trail: {},
    boxplot: {
        size: 14,
        extent: 1.5,
        box: {},
        median: { color: 'white' },
        outliers: {},
        rule: {},
        ticks: null
    },
    errorbar: {
        center: 'mean',
        rule: true,
        ticks: false
    },
    errorband: {
        band: {
            opacity: 0.3
        },
        borders: false
    },
    scale: extension_defaultScaleConfig,
    projection: {},
    legend: extension_defaultLegendConfig,
    header: { titlePadding: 10, labelPadding: 10 },
    headerColumn: {},
    headerRow: {},
    headerFacet: {},
    selection: extension_defaultConfig,
    style: {},
    title: {},
    facet: { spacing: extension_DEFAULT_SPACING },
    concat: { spacing: extension_DEFAULT_SPACING },
    normalizedNumberFormat: '.0%'
};
// Tableau10 color palette, copied from `vegaScale.scheme('tableau10')`
const extension_tab10 = [
    '#4c78a8',
    '#f58518',
    '#e45756',
    '#72b7b2',
    '#54a24b',
    '#eeca3b',
    '#b279a2',
    '#ff9da6',
    '#9d755d',
    '#bab0ac'
];
const extension_DEFAULT_FONT_SIZE = {
    text: 11,
    guideLabel: 10,
    guideTitle: 11,
    groupTitle: 13,
    groupSubtitle: 12
};
const extension_DEFAULT_COLOR = {
    blue: extension_tab10[0],
    orange: extension_tab10[1],
    red: extension_tab10[2],
    teal: extension_tab10[3],
    green: extension_tab10[4],
    yellow: extension_tab10[5],
    purple: extension_tab10[6],
    pink: extension_tab10[7],
    brown: extension_tab10[8],
    gray0: '#000',
    gray1: '#111',
    gray2: '#222',
    gray3: '#333',
    gray4: '#444',
    gray5: '#555',
    gray6: '#666',
    gray7: '#777',
    gray8: '#888',
    gray9: '#999',
    gray10: '#aaa',
    gray11: '#bbb',
    gray12: '#ccc',
    gray13: '#ddd',
    gray14: '#eee',
    gray15: '#fff'
};
function extension_colorSignalConfig(color = {}) {
    return {
        signals: [
            {
                name: 'color',
                value: extension_vega_util_module_isObject(color) ? { ...extension_DEFAULT_COLOR, ...color } : extension_DEFAULT_COLOR
            }
        ],
        mark: { color: { signal: 'color.blue' } },
        rule: { color: { signal: 'color.gray0' } },
        text: {
            color: { signal: 'color.gray0' }
        },
        style: {
            'guide-label': {
                fill: { signal: 'color.gray0' }
            },
            'guide-title': {
                fill: { signal: 'color.gray0' }
            },
            'group-title': {
                fill: { signal: 'color.gray0' }
            },
            'group-subtitle': {
                fill: { signal: 'color.gray0' }
            },
            cell: {
                stroke: { signal: 'color.gray8' }
            }
        },
        axis: {
            domainColor: { signal: 'color.gray13' },
            gridColor: { signal: 'color.gray8' },
            tickColor: { signal: 'color.gray13' }
        },
        range: {
            category: [
                { signal: 'color.blue' },
                { signal: 'color.orange' },
                { signal: 'color.red' },
                { signal: 'color.teal' },
                { signal: 'color.green' },
                { signal: 'color.yellow' },
                { signal: 'color.purple' },
                { signal: 'color.pink' },
                { signal: 'color.brown' },
                { signal: 'color.grey8' }
            ]
        }
    };
}
function extension_fontSizeSignalConfig(fontSize) {
    return {
        signals: [
            {
                name: 'fontSize',
                value: extension_vega_util_module_isObject(fontSize) ? { ...extension_DEFAULT_FONT_SIZE, ...fontSize } : extension_DEFAULT_FONT_SIZE
            }
        ],
        text: {
            fontSize: { signal: 'fontSize.text' }
        },
        style: {
            'guide-label': {
                fontSize: { signal: 'fontSize.guideLabel' }
            },
            'guide-title': {
                fontSize: { signal: 'fontSize.guideTitle' }
            },
            'group-title': {
                fontSize: { signal: 'fontSize.groupTitle' }
            },
            'group-subtitle': {
                fontSize: { signal: 'fontSize.groupSubtitle' }
            }
        }
    };
}
function extension_fontConfig(font) {
    return {
        text: { font },
        style: {
            'guide-label': { font },
            'guide-title': { font },
            'group-title': { font },
            'group-subtitle': { font }
        }
    };
}
function extension_getAxisConfigInternal(axisConfig) {
    const props = extension_util_keys(axisConfig || {});
    const axisConfigInternal = {};
    for (const prop of props) {
        const val = axisConfig[prop];
        axisConfigInternal[prop] = extension_isConditionalAxisValue(val)
            ? extension_signalOrValueRefWithCondition(val)
            : extension_signalRefOrValue(val);
    }
    return axisConfigInternal;
}
function extension_getStyleConfigInternal(styleConfig) {
    const props = extension_util_keys(styleConfig);
    const styleConfigInternal = {};
    for (const prop of props) {
        // We need to cast to cheat a bit here since styleConfig can be either mark config or axis config
        styleConfigInternal[prop] = extension_getAxisConfigInternal(styleConfig[prop]);
    }
    return styleConfigInternal;
}
const extension_configPropsWithExpr = [
    ...extension_MARK_CONFIGS,
    ...extension_AXIS_CONFIGS,
    ...extension_HEADER_CONFIGS,
    'background',
    'padding',
    'legend',
    'lineBreak',
    'scale',
    'style',
    'title',
    'view'
];
/**
 * Merge specified config with default config and config for the `color` flag,
 * then replace all expressions with signals
 */
function extension_initConfig(specifiedConfig = {}) {
    const { color, font, fontSize, selection, ...restConfig } = specifiedConfig;
    const mergedConfig = extension_mergeConfig({}, extension_duplicate(extension_config_defaultConfig), font ? extension_fontConfig(font) : {}, color ? extension_colorSignalConfig(color) : {}, fontSize ? extension_fontSizeSignalConfig(fontSize) : {}, restConfig || {});
    // mergeConfig doesn't recurse and overrides object values.
    if (selection) {
        extension_writeConfig(mergedConfig, 'selection', selection, true);
    }
    const outputConfig = extension_omit(mergedConfig, extension_configPropsWithExpr);
    for (const prop of ['background', 'lineBreak', 'padding']) {
        if (mergedConfig[prop]) {
            outputConfig[prop] = extension_signalRefOrValue(mergedConfig[prop]);
        }
    }
    for (const markConfigType of extension_MARK_CONFIGS) {
        if (mergedConfig[markConfigType]) {
            // FIXME: outputConfig[markConfigType] expects that types are replaced recursively but replaceExprRef only replaces one level deep
            outputConfig[markConfigType] = extension_replaceExprRef(mergedConfig[markConfigType]);
        }
    }
    for (const axisConfigType of extension_AXIS_CONFIGS) {
        if (mergedConfig[axisConfigType]) {
            outputConfig[axisConfigType] = extension_getAxisConfigInternal(mergedConfig[axisConfigType]);
        }
    }
    for (const headerConfigType of extension_HEADER_CONFIGS) {
        if (mergedConfig[headerConfigType]) {
            outputConfig[headerConfigType] = extension_replaceExprRef(mergedConfig[headerConfigType]);
        }
    }
    if (mergedConfig.legend) {
        outputConfig.legend = extension_replaceExprRef(mergedConfig.legend);
    }
    if (mergedConfig.scale) {
        const { invalid, ...otherScaleConfig } = mergedConfig.scale;
        const newScaleInvalid = extension_replaceExprRef(invalid, { level: 1 });
        outputConfig.scale = {
            ...extension_replaceExprRef(otherScaleConfig),
            ...(extension_util_keys(newScaleInvalid).length > 0 ? { invalid: newScaleInvalid } : {})
        };
    }
    if (mergedConfig.style) {
        outputConfig.style = extension_getStyleConfigInternal(mergedConfig.style);
    }
    if (mergedConfig.title) {
        outputConfig.title = extension_replaceExprRef(mergedConfig.title);
    }
    if (mergedConfig.view) {
        outputConfig.view = extension_replaceExprRef(mergedConfig.view);
    }
    return outputConfig;
}
const extension_MARK_STYLES = new Set(['view', ...extension_PRIMITIVE_MARKS]);
const extension_VL_ONLY_CONFIG_PROPERTIES = [
    'color',
    'fontSize',
    'background', // We apply background to the spec directly.
    'padding',
    'facet',
    'concat',
    'numberFormat',
    'numberFormatType',
    'normalizedNumberFormat',
    'normalizedNumberFormatType',
    'timeFormat',
    'countTitle',
    'header',
    'axisQuantitative',
    'axisTemporal',
    'axisDiscrete',
    'axisPoint',
    'axisXBand',
    'axisXPoint',
    'axisXDiscrete',
    'axisXQuantitative',
    'axisXTemporal',
    'axisYBand',
    'axisYPoint',
    'axisYDiscrete',
    'axisYQuantitative',
    'axisYTemporal',
    'scale',
    'selection',
    'overlay' // FIXME: Redesign and unhide this
];
const extension_VL_ONLY_ALL_MARK_SPECIFIC_CONFIG_PROPERTY_INDEX = {
    view: ['continuousWidth', 'continuousHeight', 'discreteWidth', 'discreteHeight', 'step'],
    ...extension_VL_ONLY_MARK_SPECIFIC_CONFIG_PROPERTY_INDEX
};
function extension_stripAndRedirectConfig(config) {
    config = extension_duplicate(config);
    for (const prop of extension_VL_ONLY_CONFIG_PROPERTIES) {
        delete config[prop];
    }
    if (config.axis) {
        // delete condition axis config
        for (const prop in config.axis) {
            if (extension_isConditionalAxisValue(config.axis[prop])) {
                delete config.axis[prop];
            }
        }
    }
    if (config.legend) {
        for (const prop of extension_VL_ONLY_LEGEND_CONFIG) {
            delete config.legend[prop];
        }
    }
    // Remove Vega-Lite only generic mark config
    if (config.mark) {
        for (const prop of extension_VL_ONLY_MARK_CONFIG_PROPERTIES) {
            delete config.mark[prop];
        }
        if (config.mark.tooltip && extension_vega_util_module_isObject(config.mark.tooltip)) {
            delete config.mark.tooltip;
        }
    }
    if (config.params) {
        config.signals = (config.signals || []).concat(extension_assembleParameterSignals(config.params));
        delete config.params;
    }
    for (const markType of extension_MARK_STYLES) {
        // Remove Vega-Lite-only mark config
        for (const prop of extension_VL_ONLY_MARK_CONFIG_PROPERTIES) {
            delete config[markType][prop];
        }
        // Remove Vega-Lite only mark-specific config
        const vlOnlyMarkSpecificConfigs = extension_VL_ONLY_ALL_MARK_SPECIFIC_CONFIG_PROPERTY_INDEX[markType];
        if (vlOnlyMarkSpecificConfigs) {
            for (const prop of vlOnlyMarkSpecificConfigs) {
                delete config[markType][prop];
            }
        }
        // Redirect mark config to config.style so that mark config only affect its own mark type
        // without affecting other marks that share the same underlying Vega marks.
        // For example, config.rect should not affect bar marks.
        extension_redirectConfigToStyleConfig(config, markType);
    }
    for (const m of extension_getAllCompositeMarks()) {
        // Clean up the composite mark config as we don't need them in the output specs anymore
        delete config[m];
    }
    extension_redirectTitleConfig(config);
    // Remove empty config objects.
    for (const prop in config) {
        // @ts-ignore
        if (extension_vega_util_module_isObject(config[prop]) && extension_isEmpty(config[prop])) {
            // @ts-ignore
            delete config[prop];
        }
    }
    return extension_isEmpty(config) ? undefined : config;
}
/**
 *
 * Redirect config.title -- so that title config do not affect header labels,
 * which also uses `title` directive to implement.
 *
 * For subtitle configs in config.title, keep them in config.title as header titles never have subtitles.
 */
function extension_redirectTitleConfig(config) {
    const { titleMarkConfig, subtitleMarkConfig, subtitle } = extension_extractTitleConfig(config.title);
    // set config.style if title/subtitleMarkConfig is not an empty object
    if (!extension_isEmpty(titleMarkConfig)) {
        config.style['group-title'] = {
            ...config.style['group-title'],
            ...titleMarkConfig // config.title has higher precedence than config.style.group-title in Vega
        };
    }
    if (!extension_isEmpty(subtitleMarkConfig)) {
        config.style['group-subtitle'] = {
            ...config.style['group-subtitle'],
            ...subtitleMarkConfig
        };
    }
    // subtitle part can stay in config.title since header titles do not use subtitle
    if (!extension_isEmpty(subtitle)) {
        config.title = subtitle;
    }
    else {
        delete config.title;
    }
}
function extension_redirectConfigToStyleConfig(config, prop, // string = composite mark
toProp, compositeMarkPart) {
    const propConfig = compositeMarkPart
        ? config[prop][compositeMarkPart]
        : config[prop];
    if (prop === 'view') {
        toProp = 'cell'; // View's default style is "cell"
    }
    const style = {
        ...propConfig,
        ...config.style[toProp ?? prop]
    };
    // set config.style if it is not an empty object
    if (!extension_isEmpty(style)) {
        config.style[toProp ?? prop] = style;
    }
    if (!compositeMarkPart) {
        // For composite mark, so don't delete the whole config yet as we have to do multiple redirections.
        delete config[prop];
    }
}
//# sourceMappingURL=config.js.map
;// ../../node_modules/vega-lite/build/src/spec/layer.js

function extension_isLayerSpec(spec) {
    return extension_util_hasProperty(spec, 'layer');
}
//# sourceMappingURL=layer.js.map
;// ../../node_modules/vega-lite/build/src/spec/repeat.js


function extension_isRepeatSpec(spec) {
    return extension_util_hasProperty(spec, 'repeat');
}
function extension_isLayerRepeatSpec(spec) {
    return !extension_vega_util_module_isArray(spec.repeat) && extension_util_hasProperty(spec.repeat, 'layer');
}
//# sourceMappingURL=repeat.js.map
;// ../../node_modules/vega-lite/build/src/spec/index.js





//# sourceMappingURL=index.js.map
;// ../../node_modules/vega-lite/build/src/spec/map.js






class extension_SpecMapper {
    map(spec, params) {
        if (extension_isFacetSpec(spec)) {
            return this.mapFacet(spec, params);
        }
        else if (extension_isRepeatSpec(spec)) {
            return this.mapRepeat(spec, params);
        }
        else if (extension_isHConcatSpec(spec)) {
            return this.mapHConcat(spec, params);
        }
        else if (extension_isVConcatSpec(spec)) {
            return this.mapVConcat(spec, params);
        }
        else if (extension_isConcatSpec(spec)) {
            return this.mapConcat(spec, params);
        }
        else {
            return this.mapLayerOrUnit(spec, params);
        }
    }
    mapLayerOrUnit(spec, params) {
        if (extension_isLayerSpec(spec)) {
            return this.mapLayer(spec, params);
        }
        else if (extension_isUnitSpec(spec)) {
            return this.mapUnit(spec, params);
        }
        throw new Error(extension_invalidSpec(spec));
    }
    mapLayer(spec, params) {
        return {
            ...spec,
            layer: spec.layer.map(subspec => this.mapLayerOrUnit(subspec, params))
        };
    }
    mapHConcat(spec, params) {
        return {
            ...spec,
            hconcat: spec.hconcat.map(subspec => this.map(subspec, params))
        };
    }
    mapVConcat(spec, params) {
        return {
            ...spec,
            vconcat: spec.vconcat.map(subspec => this.map(subspec, params))
        };
    }
    mapConcat(spec, params) {
        const { concat, ...rest } = spec;
        return {
            ...rest,
            concat: concat.map(subspec => this.map(subspec, params))
        };
    }
    mapFacet(spec, params) {
        return {
            // as any is required here since TS cannot infer that FO may only be FieldName or Field, but not RepeatRef
            ...spec,
            // TODO: remove "any" once we support all facet listed in https://github.com/vega/vega-lite/issues/2760
            spec: this.map(spec.spec, params)
        };
    }
    mapRepeat(spec, params) {
        return {
            ...spec,
            // as any is required here since TS cannot infer that the output type satisfies the input type
            spec: this.map(spec.spec, params)
        };
    }
}
//# sourceMappingURL=map.js.map
;// ../../node_modules/vega-lite/build/src/stack.js








const extension_STACK_OFFSET_INDEX = {
    zero: 1,
    center: 1,
    normalize: 1
};
function extension_isStackOffset(s) {
    return extension_vega_util_module_has(extension_STACK_OFFSET_INDEX, s);
}
const extension_STACKABLE_MARKS = new Set([extension_ARC, extension_BAR, extension_AREA, extension_RULE, extension_POINT, extension_CIRCLE, extension_SQUARE, extension_LINE, extension_mark_TEXT, extension_TICK]);
const extension_STACK_BY_DEFAULT_MARKS = new Set([extension_BAR, extension_AREA, extension_ARC]);
function extension_isUnbinnedQuantitative(channelDef) {
    return extension_isFieldDef(channelDef) && extension_channelDefType(channelDef) === 'quantitative' && !channelDef.bin;
}
function extension_potentialStackedChannel(encoding, x, { orient, type: mark }) {
    const y = x === 'x' ? 'y' : 'radius';
    const isCartesianBarOrArea = x === 'x' && ['bar', 'area'].includes(mark);
    const xDef = encoding[x];
    const yDef = encoding[y];
    if (extension_isFieldDef(xDef) && extension_isFieldDef(yDef)) {
        if (extension_isUnbinnedQuantitative(xDef) && extension_isUnbinnedQuantitative(yDef)) {
            if (xDef.stack) {
                return x;
            }
            else if (yDef.stack) {
                return y;
            }
            const xAggregate = extension_isFieldDef(xDef) && !!xDef.aggregate;
            const yAggregate = extension_isFieldDef(yDef) && !!yDef.aggregate;
            // if there is no explicit stacking, only apply stack if there is only one aggregate for x or y
            if (xAggregate !== yAggregate) {
                return xAggregate ? x : y;
            }
            if (isCartesianBarOrArea) {
                if (orient === 'vertical') {
                    return y;
                }
                else if (orient === 'horizontal') {
                    return x;
                }
            }
        }
        else if (extension_isUnbinnedQuantitative(xDef)) {
            return x;
        }
        else if (extension_isUnbinnedQuantitative(yDef)) {
            return y;
        }
    }
    else if (extension_isUnbinnedQuantitative(xDef)) {
        if (isCartesianBarOrArea && orient === 'vertical') {
            return undefined;
        }
        return x;
    }
    else if (extension_isUnbinnedQuantitative(yDef)) {
        if (isCartesianBarOrArea && orient === 'horizontal') {
            return undefined;
        }
        return y;
    }
    return undefined;
}
function extension_getDimensionChannel(channel) {
    switch (channel) {
        case 'x':
            return 'y';
        case 'y':
            return 'x';
        case 'theta':
            return 'radius';
        case 'radius':
            return 'theta';
    }
}
function extension_stack(m, encoding) {
    const markDef = extension_isMarkDef(m) ? m : { type: m };
    const mark = markDef.type;
    // Should have stackable mark
    if (!extension_STACKABLE_MARKS.has(mark)) {
        return null;
    }
    // Run potential stacked twice, one for Cartesian and another for Polar,
    // so text marks can be stacked in any of the coordinates.
    // Note: The logic here is not perfectly correct.  If we want to support stacked dot plots where each dot is a pie chart with label, we have to change the stack logic here to separate Cartesian stacking for polar stacking.
    // However, since we probably never want to do that, let's just note the limitation here.
    const fieldChannel = extension_potentialStackedChannel(encoding, 'x', markDef) || extension_potentialStackedChannel(encoding, 'theta', markDef);
    if (!fieldChannel) {
        return null;
    }
    const stackedFieldDef = encoding[fieldChannel];
    const stackedField = extension_isFieldDef(stackedFieldDef) ? extension_vgField(stackedFieldDef, {}) : undefined;
    const dimensionChannel = extension_getDimensionChannel(fieldChannel);
    const groupbyChannels = [];
    const groupbyFields = new Set();
    if (encoding[dimensionChannel]) {
        const dimensionDef = encoding[dimensionChannel];
        const dimensionField = extension_isFieldDef(dimensionDef) ? extension_vgField(dimensionDef, {}) : undefined;
        if (dimensionField && dimensionField !== stackedField) {
            // avoid grouping by the stacked field
            groupbyChannels.push(dimensionChannel);
            groupbyFields.add(dimensionField);
        }
    }
    const dimensionOffsetChannel = dimensionChannel === 'x' ? 'xOffset' : 'yOffset';
    const dimensionOffsetDef = encoding[dimensionOffsetChannel];
    const dimensionOffsetField = extension_isFieldDef(dimensionOffsetDef) ? extension_vgField(dimensionOffsetDef, {}) : undefined;
    if (dimensionOffsetField && dimensionOffsetField !== stackedField) {
        // avoid grouping by the stacked field
        groupbyChannels.push(dimensionOffsetChannel);
        groupbyFields.add(dimensionOffsetField);
    }
    // If the dimension has offset, don't stack anymore
    // Should have grouping level of detail that is different from the dimension field
    const stackBy = extension_NONPOSITION_CHANNELS.reduce((sc, channel) => {
        // Ignore tooltip in stackBy (https://github.com/vega/vega-lite/issues/4001)
        if (channel !== 'tooltip' && extension_channelHasField(encoding, channel)) {
            const channelDef = encoding[channel];
            for (const cDef of extension_vega_util_module_array(channelDef)) {
                const fieldDef = extension_getFieldDef(cDef);
                if (fieldDef.aggregate) {
                    continue;
                }
                // Check whether the channel's field is identical to x/y's field or if the channel is a repeat
                const f = extension_vgField(fieldDef, {});
                if (
                // if fielddef is a repeat, just include it in the stack by
                !f ||
                    // otherwise, the field must be different from the groupBy fields.
                    !groupbyFields.has(f)) {
                    sc.push({ channel, fieldDef });
                }
            }
        }
        return sc;
    }, []);
    // Automatically determine offset
    let offset;
    if (stackedFieldDef.stack !== undefined) {
        if (extension_vega_util_module_isBoolean(stackedFieldDef.stack)) {
            offset = stackedFieldDef.stack ? 'zero' : null;
        }
        else {
            offset = stackedFieldDef.stack;
        }
    }
    else if (extension_STACK_BY_DEFAULT_MARKS.has(mark)) {
        offset = 'zero';
    }
    if (!offset || !extension_isStackOffset(offset)) {
        return null;
    }
    if (extension_isAggregate(encoding) && stackBy.length === 0) {
        return null;
    }
    // warn when stacking non-linear
    if (stackedFieldDef?.scale?.type && stackedFieldDef?.scale?.type !== extension_ScaleType.LINEAR) {
        if (stackedFieldDef?.stack) {
            extension_log_warn(extension_stackNonLinearScale(stackedFieldDef.scale.type));
        }
    }
    // Check if it is a ranged mark
    if (extension_isFieldOrDatumDef(encoding[extension_getSecondaryRangeChannel(fieldChannel)])) {
        if (stackedFieldDef.stack !== undefined) {
            extension_log_warn(extension_cannotStackRangedMark(fieldChannel));
        }
        return null;
    }
    // Warn if stacking non-summative aggregate
    if (extension_isFieldDef(stackedFieldDef) &&
        stackedFieldDef.aggregate &&
        !extension_SUM_OPS.has(stackedFieldDef.aggregate)) {
        extension_log_warn(extension_stackNonSummativeAggregate(stackedFieldDef.aggregate));
    }
    return {
        groupbyChannels,
        groupbyFields,
        fieldChannel,
        impute: stackedFieldDef.impute === null ? false : extension_isPathMark(mark),
        stackBy,
        offset
    };
}
//# sourceMappingURL=stack.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/init.js









function extension_initMarkdef(originalMarkDef, encoding, config) {
    // FIXME: markDef expects that exprRefs are replaced recursively but replaceExprRef only replaces the top level
    const markDef = extension_replaceExprRef(originalMarkDef);
    // set orient, which can be overridden by rules as sometimes the specified orient is invalid.
    const specifiedOrient = extension_getMarkPropOrConfig('orient', markDef, config);
    markDef.orient = extension_orient(markDef.type, encoding, specifiedOrient);
    if (specifiedOrient !== undefined && specifiedOrient !== markDef.orient) {
        extension_log_warn(extension_orientOverridden(markDef.orient, specifiedOrient));
    }
    if (markDef.type === 'bar' && markDef.orient) {
        const cornerRadiusEnd = extension_getMarkPropOrConfig('cornerRadiusEnd', markDef, config);
        if (cornerRadiusEnd !== undefined) {
            const newProps = (markDef.orient === 'horizontal' && encoding.x2) || (markDef.orient === 'vertical' && encoding.y2)
                ? ['cornerRadius']
                : extension_BAR_CORNER_RADIUS_INDEX[markDef.orient];
            for (const newProp of newProps) {
                markDef[newProp] = cornerRadiusEnd;
            }
            if (markDef.cornerRadiusEnd !== undefined) {
                delete markDef.cornerRadiusEnd; // no need to keep the original cap cornerRadius
            }
        }
    }
    // set opacity and filled if not specified in mark config
    const specifiedOpacity = extension_getMarkPropOrConfig('opacity', markDef, config);
    const specifiedfillOpacity = extension_getMarkPropOrConfig('fillOpacity', markDef, config);
    if (specifiedOpacity === undefined && specifiedfillOpacity === undefined) {
        markDef.opacity = extension_opacity(markDef.type, encoding);
    }
    // set cursor, which should be pointer if href channel is present unless otherwise specified
    const specifiedCursor = extension_getMarkPropOrConfig('cursor', markDef, config);
    if (specifiedCursor === undefined) {
        markDef.cursor = extension_init_cursor(markDef, encoding, config);
    }
    return markDef;
}
function extension_init_cursor(markDef, encoding, config) {
    if (encoding.href || markDef.href || extension_getMarkPropOrConfig('href', markDef, config)) {
        return 'pointer';
    }
    return markDef.cursor;
}
function extension_opacity(mark, encoding) {
    if (extension_util_contains([extension_POINT, extension_TICK, extension_CIRCLE, extension_SQUARE], mark)) {
        // point-based marks
        if (!extension_isAggregate(encoding)) {
            return 0.7;
        }
    }
    return undefined;
}
function extension_defaultFilled(markDef, config, { graticule }) {
    if (graticule) {
        return false;
    }
    const filledConfig = extension_getMarkConfig('filled', markDef, config);
    const mark = markDef.type;
    return extension_getFirstDefined(filledConfig, mark !== extension_POINT && mark !== extension_LINE && mark !== extension_RULE);
}
function extension_orient(mark, encoding, specifiedOrient) {
    switch (mark) {
        case extension_POINT:
        case extension_CIRCLE:
        case extension_SQUARE:
        case extension_mark_TEXT:
        case extension_RECT:
        case extension_IMAGE:
            // orient is meaningless for these marks.
            return undefined;
    }
    const { x, y, x2, y2 } = encoding;
    switch (mark) {
        case extension_BAR:
            if (extension_isFieldDef(x) && (extension_isBinned(x.bin) || (extension_isFieldDef(y) && y.aggregate && !x.aggregate))) {
                return 'vertical';
            }
            if (extension_isFieldDef(y) && (extension_isBinned(y.bin) || (extension_isFieldDef(x) && x.aggregate && !y.aggregate))) {
                return 'horizontal';
            }
            if (y2 || x2) {
                // Ranged bar does not always have clear orientation, so we allow overriding
                if (specifiedOrient) {
                    return specifiedOrient;
                }
                // If y is range and x is non-range, non-bin Q
                if (!x2) {
                    if ((extension_isFieldDef(x) && x.type === extension_QUANTITATIVE && !extension_isBinning(x.bin)) || extension_isNumericDataDef(x)) {
                        if (extension_isFieldDef(y) && extension_isBinned(y.bin)) {
                            return 'horizontal';
                        }
                    }
                    return 'vertical';
                }
                // If x is range and y is non-range, non-bin Q
                if (!y2) {
                    if ((extension_isFieldDef(y) && y.type === extension_QUANTITATIVE && !extension_isBinning(y.bin)) || extension_isNumericDataDef(y)) {
                        if (extension_isFieldDef(x) && extension_isBinned(x.bin)) {
                            return 'vertical';
                        }
                    }
                    return 'horizontal';
                }
            }
        // falls through
        case extension_RULE:
            // return undefined for line segment rule and bar with both axis ranged
            // we have to ignore the case that the data are already binned
            if (x2 && !(extension_isFieldDef(x) && extension_isBinned(x.bin)) && y2 && !(extension_isFieldDef(y) && extension_isBinned(y.bin))) {
                return undefined;
            }
        // falls through
        case extension_AREA:
            // If there are range for both x and y, y (vertical) has higher precedence.
            if (y2) {
                if (extension_isFieldDef(y) && extension_isBinned(y.bin)) {
                    return 'horizontal';
                }
                else {
                    return 'vertical';
                }
            }
            else if (x2) {
                if (extension_isFieldDef(x) && extension_isBinned(x.bin)) {
                    return 'vertical';
                }
                else {
                    return 'horizontal';
                }
            }
            else if (mark === extension_RULE) {
                if (x && !y) {
                    return 'vertical';
                }
                else if (y && !x) {
                    return 'horizontal';
                }
            }
        // falls through
        case extension_LINE:
        case extension_TICK: {
            const xIsMeasure = extension_isUnbinnedQuantitativeFieldOrDatumDef(x);
            const yIsMeasure = extension_isUnbinnedQuantitativeFieldOrDatumDef(y);
            if (specifiedOrient) {
                return specifiedOrient;
            }
            else if (xIsMeasure && !yIsMeasure) {
                // Tick is opposite to bar, line, area
                return mark !== 'tick' ? 'horizontal' : 'vertical';
            }
            else if (!xIsMeasure && yIsMeasure) {
                // Tick is opposite to bar, line, area
                return mark !== 'tick' ? 'vertical' : 'horizontal';
            }
            else if (xIsMeasure && yIsMeasure) {
                return 'vertical';
            }
            else {
                const xIsTemporal = extension_isTypedFieldDef(x) && x.type === extension_TEMPORAL;
                const yIsTemporal = extension_isTypedFieldDef(y) && y.type === extension_TEMPORAL;
                // x: T, y: N --> vertical tick
                if (xIsTemporal && !yIsTemporal) {
                    return 'vertical';
                }
                else if (!xIsTemporal && yIsTemporal) {
                    return 'horizontal';
                }
            }
            return undefined;
        }
    }
    return 'vertical';
}
//# sourceMappingURL=init.js.map
;// ../../node_modules/vega-lite/build/src/normalize/pathoverlay.js







function extension_dropLineAndPoint(markDef) {
    const { point: _point, line: _line, ...mark } = markDef;
    return extension_util_keys(mark).length > 1 ? mark : mark.type;
}
function extension_dropLineAndPointFromConfig(config) {
    for (const mark of ['line', 'area', 'rule', 'trail']) {
        if (config[mark]) {
            config = {
                ...config,
                // TODO: remove as any
                [mark]: extension_omit(config[mark], ['point', 'line'])
            };
        }
    }
    return config;
}
function extension_getPointOverlay(markDef, markConfig = {}, encoding) {
    if (markDef.point === 'transparent') {
        return { opacity: 0 };
    }
    else if (markDef.point) {
        // truthy : true or object
        return extension_vega_util_module_isObject(markDef.point) ? markDef.point : {};
    }
    else if (markDef.point !== undefined) {
        // false or null
        return null;
    }
    else {
        // undefined (not disabled)
        if (markConfig.point || encoding.shape) {
            // enable point overlay if config[mark].point is truthy or if encoding.shape is provided
            return extension_vega_util_module_isObject(markConfig.point) ? markConfig.point : {};
        }
        // markDef.point is defined as falsy
        return undefined;
    }
}
function extension_getLineOverlay(markDef, markConfig = {}) {
    if (markDef.line) {
        // true or object
        return markDef.line === true ? {} : markDef.line;
    }
    else if (markDef.line !== undefined) {
        // false or null
        return null;
    }
    else {
        // undefined (not disabled)
        if (markConfig.line) {
            // enable line overlay if config[mark].line is truthy
            return markConfig.line === true ? {} : markConfig.line;
        }
        // markDef.point is defined as falsy
        return undefined;
    }
}
class extension_PathOverlayNormalizer {
    constructor() {
        this.name = 'path-overlay';
    }
    hasMatchingType(spec, config) {
        if (extension_isUnitSpec(spec)) {
            const { mark, encoding } = spec;
            const markDef = extension_isMarkDef(mark) ? mark : { type: mark };
            switch (markDef.type) {
                case 'line':
                case 'rule':
                case 'trail':
                    return !!extension_getPointOverlay(markDef, config[markDef.type], encoding);
                case 'area':
                    return (
                    // false / null are also included as we want to remove the properties
                    !!extension_getPointOverlay(markDef, config[markDef.type], encoding) ||
                        !!extension_getLineOverlay(markDef, config[markDef.type]));
            }
        }
        return false;
    }
    run(spec, normParams, normalize) {
        const { config } = normParams;
        const { params, projection, mark, name, encoding: e, ...outerSpec } = spec;
        // Need to call normalizeEncoding because we need the inferred types to correctly determine stack
        const encoding = extension_normalizeEncoding(e, config);
        const markDef = extension_isMarkDef(mark) ? mark : { type: mark };
        const pointOverlay = extension_getPointOverlay(markDef, config[markDef.type], encoding);
        const lineOverlay = markDef.type === 'area' && extension_getLineOverlay(markDef, config[markDef.type]);
        const layer = [
            {
                name,
                ...(params ? { params } : {}),
                mark: extension_dropLineAndPoint({
                    // TODO: extract this 0.7 to be shared with default opacity for point/tick/...
                    ...(markDef.type === 'area' && markDef.opacity === undefined && markDef.fillOpacity === undefined
                        ? { opacity: 0.7 }
                        : {}),
                    ...markDef
                }),
                // drop shape from encoding as this might be used to trigger point overlay
                encoding: extension_omit(encoding, ['shape'])
            }
        ];
        // FIXME: determine rules for applying selections.
        // Need to copy stack config to overlayed layer
        // FIXME: normalizer shouldn't call `initMarkdef`, a method from an init phase.
        const stackProps = extension_stack(extension_initMarkdef(markDef, encoding, config), encoding);
        let overlayEncoding = encoding;
        if (stackProps) {
            const { fieldChannel: stackFieldChannel, offset } = stackProps;
            overlayEncoding = {
                ...encoding,
                [stackFieldChannel]: {
                    ...encoding[stackFieldChannel],
                    ...(offset ? { stack: offset } : {})
                }
            };
        }
        // overlay line layer should be on the edge of area but passing y2/x2 makes
        // it as "rule" mark so that it draws unwanted vertical/horizontal lines.
        // point overlay also should not have y2/x2 as it does not support.
        overlayEncoding = extension_omit(overlayEncoding, ['y2', 'x2']);
        if (lineOverlay) {
            layer.push({
                ...(projection ? { projection } : {}),
                mark: {
                    type: 'line',
                    ...extension_util_pick(markDef, ['clip', 'interpolate', 'tension', 'tooltip']),
                    ...lineOverlay
                },
                encoding: overlayEncoding
            });
        }
        if (pointOverlay) {
            layer.push({
                ...(projection ? { projection } : {}),
                mark: {
                    type: 'point',
                    opacity: 1,
                    filled: true,
                    ...extension_util_pick(markDef, ['clip', 'tooltip']),
                    ...pointOverlay
                },
                encoding: overlayEncoding
            });
        }
        return normalize({
            ...outerSpec,
            layer
        }, {
            ...normParams,
            config: extension_dropLineAndPointFromConfig(config)
        });
    }
}
//# sourceMappingURL=pathoverlay.js.map
;// ../../node_modules/vega-lite/build/src/normalize/repeater.js






function extension_replaceRepeaterInFacet(facet, repeater) {
    if (!repeater) {
        return facet;
    }
    if (extension_isFacetMapping(facet)) {
        return extension_replaceRepeaterInMapping(facet, repeater);
    }
    return extension_replaceRepeaterInFieldDef(facet, repeater);
}
function extension_replaceRepeaterInEncoding(encoding, repeater) {
    if (!repeater) {
        return encoding;
    }
    return extension_replaceRepeaterInMapping(encoding, repeater);
}
/**
 * Replaces repeated value and returns if the repeated value is valid.
 */
function extension_replaceRepeatInProp(prop, o, repeater) {
    const val = o[prop];
    if (extension_isRepeatRef(val)) {
        if (val.repeat in repeater) {
            return { ...o, [prop]: repeater[val.repeat] };
        }
        else {
            extension_log_warn(extension_noSuchRepeatedValue(val.repeat));
            return undefined;
        }
    }
    return o;
}
/**
 * Replace repeater values in a field def with the concrete field name.
 */
function extension_replaceRepeaterInFieldDef(fieldDef, repeater) {
    fieldDef = extension_replaceRepeatInProp('field', fieldDef, repeater);
    if (fieldDef === undefined) {
        // the field def should be ignored
        return undefined;
    }
    else if (fieldDef === null) {
        return null;
    }
    if (extension_isSortableFieldDef(fieldDef) && extension_isSortField(fieldDef.sort)) {
        const sort = extension_replaceRepeatInProp('field', fieldDef.sort, repeater);
        fieldDef = {
            ...fieldDef,
            ...(sort ? { sort } : {})
        };
    }
    return fieldDef;
}
function extension_replaceRepeaterInFieldOrDatumDef(def, repeater) {
    if (extension_isFieldDef(def)) {
        return extension_replaceRepeaterInFieldDef(def, repeater);
    }
    else {
        const datumDef = extension_replaceRepeatInProp('datum', def, repeater);
        if (datumDef !== def && !datumDef.type) {
            datumDef.type = 'nominal';
        }
        return datumDef;
    }
}
function extension_replaceRepeaterInChannelDef(channelDef, repeater) {
    if (extension_isFieldOrDatumDef(channelDef)) {
        const fd = extension_replaceRepeaterInFieldOrDatumDef(channelDef, repeater);
        if (fd) {
            return fd;
        }
        else if (extension_isConditionalDef(channelDef)) {
            return { condition: channelDef.condition };
        }
    }
    else {
        if (extension_hasConditionalFieldOrDatumDef(channelDef)) {
            const fd = extension_replaceRepeaterInFieldOrDatumDef(channelDef.condition, repeater);
            if (fd) {
                return {
                    ...channelDef,
                    condition: fd
                };
            }
            else {
                const { condition, ...channelDefWithoutCondition } = channelDef;
                return channelDefWithoutCondition;
            }
        }
        return channelDef;
    }
    return undefined;
}
function extension_replaceRepeaterInMapping(mapping, repeater) {
    const out = {};
    for (const channel in mapping) {
        if (extension_util_hasProperty(mapping, channel)) {
            const channelDef = mapping[channel];
            if (extension_vega_util_module_isArray(channelDef)) {
                // array cannot have condition
                out[channel] = channelDef // somehow we need to cast it here
                    .map(cd => extension_replaceRepeaterInChannelDef(cd, repeater))
                    .filter(cd => cd);
            }
            else {
                const cd = extension_replaceRepeaterInChannelDef(channelDef, repeater);
                if (cd !== undefined) {
                    out[channel] = cd;
                }
            }
        }
    }
    return out;
}
//# sourceMappingURL=repeater.js.map
;// ../../node_modules/vega-lite/build/src/normalize/ruleforrangedline.js







class extension_RuleForRangedLineNormalizer {
    constructor() {
        this.name = 'RuleForRangedLine';
    }
    hasMatchingType(spec) {
        if (extension_isUnitSpec(spec)) {
            const { encoding, mark } = spec;
            if (mark === 'line' || (extension_isMarkDef(mark) && mark.type === 'line')) {
                for (const channel of extension_SECONDARY_RANGE_CHANNEL) {
                    const mainChannel = extension_getMainRangeChannel(channel);
                    const mainChannelDef = encoding[mainChannel];
                    if (encoding[channel]) {
                        if ((extension_isFieldDef(mainChannelDef) && !extension_isBinned(mainChannelDef.bin)) || extension_isDatumDef(mainChannelDef)) {
                            return true;
                        }
                    }
                }
            }
        }
        return false;
    }
    run(spec, params, normalize) {
        const { encoding, mark } = spec;
        extension_log_warn(extension_lineWithRange(!!encoding.x2, !!encoding.y2));
        return normalize({
            ...spec,
            mark: extension_vega_util_module_isObject(mark) ? { ...mark, type: 'rule' } : 'rule'
        }, params);
    }
}
//# sourceMappingURL=ruleforrangedline.js.map
;// ../../node_modules/vega-lite/build/src/normalize/core.js

















class extension_CoreNormalizer extends extension_SpecMapper {
    constructor() {
        super(...arguments);
        this.nonFacetUnitNormalizers = [
            extension_boxPlotNormalizer,
            extension_errorBarNormalizer,
            extension_errorBandNormalizer,
            new extension_PathOverlayNormalizer(),
            new extension_RuleForRangedLineNormalizer()
        ];
    }
    map(spec, params) {
        // Special handling for a faceted unit spec as it can return a facet spec, not just a layer or unit spec like a normal unit spec.
        if (extension_isUnitSpec(spec)) {
            const hasRow = extension_channelHasField(spec.encoding, extension_ROW);
            const hasColumn = extension_channelHasField(spec.encoding, extension_COLUMN);
            const hasFacet = extension_channelHasField(spec.encoding, extension_FACET);
            if (hasRow || hasColumn || hasFacet) {
                return this.mapFacetedUnit(spec, params);
            }
        }
        return super.map(spec, params);
    }
    // This is for normalizing non-facet unit
    mapUnit(spec, params) {
        const { parentEncoding, parentProjection } = params;
        const encoding = extension_replaceRepeaterInEncoding(spec.encoding, params.repeater);
        const specWithReplacedEncoding = {
            ...spec,
            ...(spec.name ? { name: [params.repeaterPrefix, spec.name].filter(n => n).join('_') } : {}),
            ...(encoding ? { encoding } : {})
        };
        if (parentEncoding || parentProjection) {
            return this.mapUnitWithParentEncodingOrProjection(specWithReplacedEncoding, params);
        }
        const normalizeLayerOrUnit = this.mapLayerOrUnit.bind(this);
        for (const unitNormalizer of this.nonFacetUnitNormalizers) {
            if (unitNormalizer.hasMatchingType(specWithReplacedEncoding, params.config)) {
                return unitNormalizer.run(specWithReplacedEncoding, params, normalizeLayerOrUnit);
            }
        }
        return specWithReplacedEncoding;
    }
    mapRepeat(spec, params) {
        if (extension_isLayerRepeatSpec(spec)) {
            return this.mapLayerRepeat(spec, params);
        }
        else {
            return this.mapNonLayerRepeat(spec, params);
        }
    }
    mapLayerRepeat(spec, params) {
        const { repeat, spec: childSpec, ...rest } = spec;
        const { row, column, layer } = repeat;
        const { repeater = {}, repeaterPrefix = '' } = params;
        if (row || column) {
            return this.mapRepeat({
                ...spec,
                repeat: {
                    ...(row ? { row } : {}),
                    ...(column ? { column } : {})
                },
                spec: {
                    repeat: { layer },
                    spec: childSpec
                }
            }, params);
        }
        else {
            return {
                ...rest,
                layer: layer.map(layerValue => {
                    const childRepeater = {
                        ...repeater,
                        layer: layerValue
                    };
                    const childName = `${(childSpec.name ? `${childSpec.name}_` : '') + repeaterPrefix}child__layer_${extension_varName(layerValue)}`;
                    const child = this.mapLayerOrUnit(childSpec, { ...params, repeater: childRepeater, repeaterPrefix: childName });
                    child.name = childName;
                    return child;
                })
            };
        }
    }
    mapNonLayerRepeat(spec, params) {
        const { repeat, spec: childSpec, data, ...remainingProperties } = spec;
        if (!extension_vega_util_module_isArray(repeat) && spec.columns) {
            // is repeat with row/column
            spec = extension_omit(spec, ['columns']);
            extension_log_warn(extension_columnsNotSupportByRowCol('repeat'));
        }
        const concat = [];
        const { repeater = {}, repeaterPrefix = '' } = params;
        const row = (!extension_vega_util_module_isArray(repeat) && repeat.row) || [repeater ? repeater.row : null];
        const column = (!extension_vega_util_module_isArray(repeat) && repeat.column) || [repeater ? repeater.column : null];
        const repeatValues = (extension_vega_util_module_isArray(repeat) && repeat) || [repeater ? repeater.repeat : null];
        // cross product
        for (const repeatValue of repeatValues) {
            for (const rowValue of row) {
                for (const columnValue of column) {
                    const childRepeater = {
                        repeat: repeatValue,
                        row: rowValue,
                        column: columnValue,
                        layer: repeater.layer
                    };
                    const childName = (childSpec.name ? `${childSpec.name}_` : '') +
                        repeaterPrefix +
                        'child__' +
                        (extension_vega_util_module_isArray(repeat)
                            ? `${extension_varName(repeatValue)}`
                            : (repeat.row ? `row_${extension_varName(rowValue)}` : '') +
                                (repeat.column ? `column_${extension_varName(columnValue)}` : ''));
                    const child = this.map(childSpec, { ...params, repeater: childRepeater, repeaterPrefix: childName });
                    child.name = childName;
                    // we move data up
                    concat.push(extension_omit(child, ['data']));
                }
            }
        }
        const columns = extension_vega_util_module_isArray(repeat) ? spec.columns : repeat.column ? repeat.column.length : 1;
        return {
            data: childSpec.data ?? data, // data from child spec should have precedence
            align: 'all',
            ...remainingProperties,
            columns,
            concat
        };
    }
    mapFacet(spec, params) {
        const { facet } = spec;
        if (extension_isFacetMapping(facet) && spec.columns) {
            // is facet with row/column
            spec = extension_omit(spec, ['columns']);
            extension_log_warn(extension_columnsNotSupportByRowCol('facet'));
        }
        return super.mapFacet(spec, params);
    }
    mapUnitWithParentEncodingOrProjection(spec, params) {
        const { encoding, projection } = spec;
        const { parentEncoding, parentProjection, config } = params;
        const mergedProjection = extension_mergeProjection({ parentProjection, projection });
        const mergedEncoding = extension_mergeEncoding({
            parentEncoding,
            encoding: extension_replaceRepeaterInEncoding(encoding, params.repeater)
        });
        return this.mapUnit({
            ...spec,
            ...(mergedProjection ? { projection: mergedProjection } : {}),
            ...(mergedEncoding ? { encoding: mergedEncoding } : {})
        }, { config });
    }
    mapFacetedUnit(spec, normParams) {
        // New encoding in the inside spec should not contain row / column
        // as row/column should be moved to facet
        const { row, column, facet, ...encoding } = spec.encoding;
        // Mark and encoding should be moved into the inner spec
        const { mark, width, projection, height, view, params, encoding: _, ...outerSpec } = spec;
        const { facetMapping, layout } = this.getFacetMappingAndLayout({ row, column, facet }, normParams);
        const newEncoding = extension_replaceRepeaterInEncoding(encoding, normParams.repeater);
        return this.mapFacet({
            ...outerSpec,
            ...layout,
            // row / column has higher precedence than facet
            facet: facetMapping,
            spec: {
                ...(width ? { width } : {}),
                ...(height ? { height } : {}),
                ...(view ? { view } : {}),
                ...(projection ? { projection } : {}),
                mark,
                encoding: newEncoding,
                ...(params ? { params } : {})
            }
        }, normParams);
    }
    getFacetMappingAndLayout(facets, params) {
        const { row, column, facet } = facets;
        if (row || column) {
            if (facet) {
                extension_log_warn(extension_facetChannelDropped([...(row ? [extension_ROW] : []), ...(column ? [extension_COLUMN] : [])]));
            }
            const facetMapping = {};
            const layout = {};
            for (const channel of [extension_ROW, extension_COLUMN]) {
                const def = facets[channel];
                if (def) {
                    const { align, center, spacing, columns, ...defWithoutLayout } = def;
                    facetMapping[channel] = defWithoutLayout;
                    for (const prop of ['align', 'center', 'spacing']) {
                        if (def[prop] !== undefined) {
                            layout[prop] ?? (layout[prop] = {});
                            layout[prop][channel] = def[prop];
                        }
                    }
                }
            }
            return { facetMapping, layout };
        }
        else {
            const { align, center, spacing, columns, ...facetMapping } = facet;
            return {
                facetMapping: extension_replaceRepeaterInFacet(facetMapping, params.repeater),
                layout: {
                    ...(align ? { align } : {}),
                    ...(center ? { center } : {}),
                    ...(spacing ? { spacing } : {}),
                    ...(columns ? { columns } : {})
                }
            };
        }
    }
    mapLayer(spec, { parentEncoding, parentProjection, ...otherParams }) {
        // Special handling for extended layer spec
        const { encoding, projection, ...rest } = spec;
        const params = {
            ...otherParams,
            parentEncoding: extension_mergeEncoding({ parentEncoding, encoding, layer: true }),
            parentProjection: extension_mergeProjection({ parentProjection, projection })
        };
        return super.mapLayer({
            ...rest,
            ...(spec.name ? { name: [params.repeaterPrefix, spec.name].filter(n => n).join('_') } : {})
        }, params);
    }
}
function extension_mergeEncoding({ parentEncoding, encoding = {}, layer }) {
    let merged = {};
    if (parentEncoding) {
        const channels = new Set([...extension_util_keys(parentEncoding), ...extension_util_keys(encoding)]);
        for (const channel of channels) {
            const channelDef = encoding[channel];
            const parentChannelDef = parentEncoding[channel];
            if (extension_isFieldOrDatumDef(channelDef)) {
                // Field/Datum Def can inherit properties from its parent
                // Note that parentChannelDef doesn't have to be a field/datum def if the channelDef is already one.
                const mergedChannelDef = {
                    ...parentChannelDef,
                    ...channelDef
                };
                merged[channel] = mergedChannelDef;
            }
            else if (extension_hasConditionalFieldOrDatumDef(channelDef)) {
                merged[channel] = {
                    ...channelDef,
                    condition: {
                        ...parentChannelDef,
                        ...channelDef.condition
                    }
                };
            }
            else if (channelDef || channelDef === null) {
                merged[channel] = channelDef;
            }
            else if (layer ||
                extension_isValueDef(parentChannelDef) ||
                extension_isSignalRef(parentChannelDef) ||
                extension_isFieldOrDatumDef(parentChannelDef) ||
                extension_vega_util_module_isArray(parentChannelDef)) {
                merged[channel] = parentChannelDef;
            }
        }
    }
    else {
        merged = encoding;
    }
    return !merged || extension_isEmpty(merged) ? undefined : merged;
}
function extension_mergeProjection(opt) {
    const { parentProjection, projection } = opt;
    if (parentProjection && projection) {
        extension_log_warn(extension_projectionOverridden({ parentProjection, projection }));
    }
    return projection ?? parentProjection;
}
//# sourceMappingURL=core.js.map
;// ../../node_modules/vega-lite/build/src/transform.js



function extension_isFilter(t) {
    return extension_util_hasProperty(t, 'filter');
}
function extension_isImputeSequence(t) {
    return extension_util_hasProperty(t, 'stop');
}
function extension_isLookup(t) {
    return extension_util_hasProperty(t, 'lookup');
}
function extension_isLookupData(from) {
    return extension_util_hasProperty(from, 'data');
}
function extension_isLookupSelection(from) {
    return extension_util_hasProperty(from, 'param');
}
function extension_isPivot(t) {
    return extension_util_hasProperty(t, 'pivot');
}
function extension_isDensity(t) {
    return extension_util_hasProperty(t, 'density');
}
function extension_transform_isQuantile(t) {
    return extension_util_hasProperty(t, 'quantile');
}
function extension_isRegression(t) {
    return extension_util_hasProperty(t, 'regression');
}
function extension_isLoess(t) {
    return extension_util_hasProperty(t, 'loess');
}
function extension_isSample(t) {
    return extension_util_hasProperty(t, 'sample');
}
function extension_isWindow(t) {
    return extension_util_hasProperty(t, 'window');
}
function extension_isJoinAggregate(t) {
    return extension_util_hasProperty(t, 'joinaggregate');
}
function extension_isFlatten(t) {
    return extension_util_hasProperty(t, 'flatten');
}
function extension_isCalculate(t) {
    return extension_util_hasProperty(t, 'calculate');
}
function extension_isBin(t) {
    return extension_util_hasProperty(t, 'bin');
}
function extension_isImpute(t) {
    return extension_util_hasProperty(t, 'impute');
}
function extension_isTimeUnit(t) {
    return extension_util_hasProperty(t, 'timeUnit');
}
function extension_transform_isAggregate(t) {
    return extension_util_hasProperty(t, 'aggregate');
}
function extension_isStack(t) {
    return extension_util_hasProperty(t, 'stack');
}
function extension_isFold(t) {
    return extension_util_hasProperty(t, 'fold');
}
function extension_isExtent(t) {
    return extension_util_hasProperty(t, 'extent') && !extension_util_hasProperty(t, 'density') && !extension_util_hasProperty(t, 'regression');
}
function extension_normalizeTransform(transform) {
    return transform.map(t => {
        if (extension_isFilter(t)) {
            return {
                filter: extension_normalizeLogicalComposition(t.filter, extension_normalizePredicate)
            };
        }
        return t;
    });
}
//# sourceMappingURL=transform.js.map
;// ../../node_modules/vega-lite/build/src/normalize/selectioncompat.js







class extension_SelectionCompatibilityNormalizer extends extension_SpecMapper {
    map(spec, normParams) {
        normParams.emptySelections ?? (normParams.emptySelections = {});
        normParams.selectionPredicates ?? (normParams.selectionPredicates = {});
        spec = extension_normalizeTransforms(spec, normParams);
        return super.map(spec, normParams);
    }
    mapLayerOrUnit(spec, normParams) {
        spec = extension_normalizeTransforms(spec, normParams);
        if (spec.encoding) {
            const encoding = {};
            for (const [channel, enc] of extension_util_entries(spec.encoding)) {
                encoding[channel] = extension_normalizeChannelDef(enc, normParams);
            }
            spec = { ...spec, encoding };
        }
        return super.mapLayerOrUnit(spec, normParams);
    }
    mapUnit(spec, normParams) {
        const { selection, ...rest } = spec;
        if (selection) {
            return {
                ...rest,
                params: extension_util_entries(selection).map(([name, selDef]) => {
                    const { init: value, bind, empty, ...select } = selDef;
                    if (select.type === 'single') {
                        select.type = 'point';
                        select.toggle = false;
                    }
                    else if (select.type === 'multi') {
                        select.type = 'point';
                    }
                    // Propagate emptiness forwards and backwards
                    normParams.emptySelections[name] = empty !== 'none';
                    for (const pred of extension_vals(normParams.selectionPredicates[name] ?? {})) {
                        pred.empty = empty !== 'none';
                    }
                    return { name, value, select, bind };
                })
            };
        }
        return spec;
    }
}
function extension_normalizeTransforms(spec, normParams) {
    const { transform: tx, ...rest } = spec;
    if (tx) {
        const transform = tx.map((t) => {
            if (extension_isFilter(t)) {
                return { filter: extension_selectioncompat_normalizePredicate(t, normParams) };
            }
            else if (extension_isBin(t) && extension_isBinParams(t.bin)) {
                return {
                    ...t,
                    bin: extension_normalizeBinExtent(t.bin)
                };
            }
            else if (extension_isLookup(t)) {
                const { selection: param, ...from } = t.from;
                return param
                    ? {
                        ...t,
                        from: { param, ...from }
                    }
                    : t;
            }
            return t;
        });
        return { ...rest, transform };
    }
    return spec;
}
function extension_normalizeChannelDef(obj, normParams) {
    const enc = extension_duplicate(obj);
    if (extension_isFieldDef(enc) && extension_isBinParams(enc.bin)) {
        enc.bin = extension_normalizeBinExtent(enc.bin);
    }
    if (extension_isScaleFieldDef(enc) && enc.scale?.domain?.selection) {
        const { selection: param, ...domain } = enc.scale.domain;
        enc.scale.domain = { ...domain, ...(param ? { param } : {}) };
    }
    if (extension_isConditionalDef(enc)) {
        if (extension_vega_util_module_isArray(enc.condition)) {
            enc.condition = enc.condition.map((c) => {
                const { selection, param, test, ...cond } = c;
                return param ? c : { ...cond, test: extension_selectioncompat_normalizePredicate(c, normParams) };
            });
        }
        else {
            const { selection, param, test, ...cond } = extension_normalizeChannelDef(enc.condition, normParams);
            enc.condition = param
                ? enc.condition
                : {
                    ...cond,
                    test: extension_selectioncompat_normalizePredicate(enc.condition, normParams)
                };
        }
    }
    return enc;
}
function extension_normalizeBinExtent(bin) {
    const ext = bin.extent;
    if (ext?.selection) {
        const { selection: param, ...rest } = ext;
        return { ...bin, extent: { ...rest, param } };
    }
    return bin;
}
function extension_selectioncompat_normalizePredicate(op, normParams) {
    // Normalize old compositions of selection names (e.g., selection: {and: ["one", "two"]})
    const normalizeSelectionComposition = (o) => {
        return extension_normalizeLogicalComposition(o, param => {
            var _a;
            const empty = normParams.emptySelections[param] ?? true;
            const pred = { param, empty };
            (_a = normParams.selectionPredicates)[param] ?? (_a[param] = []);
            normParams.selectionPredicates[param].push(pred);
            return pred;
        });
    };
    return op.selection
        ? normalizeSelectionComposition(op.selection)
        : extension_normalizeLogicalComposition(op.test || op.filter, o => o.selection ? normalizeSelectionComposition(o.selection) : o);
}
//# sourceMappingURL=selectioncompat.js.map
;// ../../node_modules/vega-lite/build/src/normalize/toplevelselection.js




class extension_TopLevelSelectionsNormalizer extends extension_SpecMapper {
    map(spec, normParams) {
        const selections = normParams.selections ?? [];
        if (spec.params && !extension_isUnitSpec(spec)) {
            const params = [];
            for (const param of spec.params) {
                if (extension_isSelectionParameter(param)) {
                    selections.push(param);
                }
                else {
                    params.push(param);
                }
            }
            spec.params = params;
        }
        normParams.selections = selections;
        return super.map(spec, normParams);
    }
    mapUnit(spec, normParams) {
        const selections = normParams.selections;
        if (!selections || !selections.length)
            return spec;
        const path = (normParams.path ?? []).concat(spec.name);
        const params = [];
        for (const selection of selections) {
            // By default, apply selections to all unit views.
            if (!selection.views || !selection.views.length) {
                params.push(selection);
            }
            else {
                for (const view of selection.views) {
                    // view is either a specific unit name, or a partial path through the spec tree.
                    if ((extension_vega_util_module_isString(view) && (view === spec.name || path.includes(view))) ||
                        (extension_vega_util_module_isArray(view) &&
                            // logic for backwards compatibility with view paths before we had unique names
                            // @ts-ignore
                            view.map(v => path.indexOf(v)).every((v, i, arr) => v !== -1 && (i === 0 || v > arr[i - 1])))) {
                        params.push(selection);
                    }
                }
            }
        }
        if (params.length)
            spec.params = params;
        return spec;
    }
}
for (const method of ['mapFacet', 'mapRepeat', 'mapHConcat', 'mapVConcat', 'mapLayer']) {
    const proto = extension_TopLevelSelectionsNormalizer.prototype[method];
    extension_TopLevelSelectionsNormalizer.prototype[method] = function (spec, params) {
        return proto.call(this, spec, extension_addSpecNameToParams(spec, params));
    };
}
function extension_addSpecNameToParams(spec, params) {
    return spec.name
        ? {
            ...params,
            path: (params.path ?? []).concat(spec.name)
        }
        : params;
}
//# sourceMappingURL=toplevelselection.js.map
;// ../../node_modules/vega-lite/build/src/normalize/index.js








function extension_normalize_normalize(spec, config) {
    if (config === undefined) {
        config = extension_initConfig(spec.config);
    }
    const normalizedSpec = extension_normalizeGenericSpec(spec, config);
    const { width, height } = spec;
    const autosize = src_extension_normalizeAutoSize(normalizedSpec, { width, height, autosize: spec.autosize }, config);
    return {
        ...normalizedSpec,
        ...(autosize ? { autosize } : {})
    };
}
const extension_coreNormalizer = new extension_CoreNormalizer();
const extension_selectionCompatNormalizer = new extension_SelectionCompatibilityNormalizer();
const extension_topLevelSelectionNormalizer = new extension_TopLevelSelectionsNormalizer();
/**
 * Decompose extended unit specs into composition of pure unit specs.
 * And push top-level selection definitions down to unit specs.
 */
function extension_normalizeGenericSpec(spec, config = {}) {
    const normParams = { config };
    return extension_topLevelSelectionNormalizer.map(extension_coreNormalizer.map(extension_selectionCompatNormalizer.map(spec, normParams), normParams), normParams);
}
function extension_normalizeAutoSize(autosize) {
    return extension_vega_util_module_isString(autosize) ? { type: autosize } : (autosize ?? {});
}
/**
 * Normalize autosize and deal with width or height == "container".
 */
function src_extension_normalizeAutoSize(spec, sizeInfo, config) {
    let { width, height } = sizeInfo;
    const isFitCompatible = extension_isUnitSpec(spec) || extension_isLayerSpec(spec);
    const autosizeDefault = {};
    if (!isFitCompatible) {
        // If spec is not compatible with autosize == "fit", discard width/height == container
        if (width == 'container') {
            extension_log_warn(extension_containerSizeNonSingle('width'));
            width = undefined;
        }
        if (height == 'container') {
            extension_log_warn(extension_containerSizeNonSingle('height'));
            height = undefined;
        }
    }
    else {
        // Default autosize parameters to fit when width/height is "container"
        if (width == 'container' && height == 'container') {
            autosizeDefault.type = 'fit';
            autosizeDefault.contains = 'padding';
        }
        else if (width == 'container') {
            autosizeDefault.type = 'fit-x';
            autosizeDefault.contains = 'padding';
        }
        else if (height == 'container') {
            autosizeDefault.type = 'fit-y';
            autosizeDefault.contains = 'padding';
        }
    }
    const autosize = {
        type: 'pad',
        ...autosizeDefault,
        ...(config ? extension_normalizeAutoSize(config.autosize) : {}),
        ...extension_normalizeAutoSize(spec.autosize)
    };
    if (autosize.type === 'fit' && !isFitCompatible) {
        extension_log_warn(extension_FIT_NON_SINGLE);
        autosize.type = 'pad';
    }
    if (width == 'container' && !(autosize.type == 'fit' || autosize.type == 'fit-x')) {
        extension_log_warn(extension_containerSizeNotCompatibleWithAutosize('width'));
    }
    if (height == 'container' && !(autosize.type == 'fit' || autosize.type == 'fit-y')) {
        extension_log_warn(extension_containerSizeNotCompatibleWithAutosize('height'));
    }
    // Delete autosize property if it's Vega's default
    if (extension_util_deepEqual(autosize, { type: 'pad' })) {
        return undefined;
    }
    return autosize;
}
//# sourceMappingURL=index.js.map
;// ../../node_modules/vega-lite/build/src/spec/toplevel.js


function extension_isFitType(autoSizeType) {
    return ['fit', 'fit-x', 'fit-y'].includes(autoSizeType);
}
function extension_getFitType(sizeType) {
    return sizeType ? `fit-${extension_getPositionScaleChannel(sizeType)}` : 'fit';
}
const extension_TOP_LEVEL_PROPERTIES = [
    'background',
    'padding'
    // We do not include "autosize" here as it is supported by only unit and layer specs and thus need to be normalized
];
function extension_extractTopLevelProperties(t, includeParams) {
    const o = {};
    for (const p of extension_TOP_LEVEL_PROPERTIES) {
        if (t && t[p] !== undefined) {
            o[p] = extension_signalRefOrValue(t[p]);
        }
    }
    if (includeParams) {
        o.params = t.params;
    }
    return o;
}
//# sourceMappingURL=toplevel.js.map
;// ../../node_modules/vega-lite/build/src/compile/split.js


/**
 * Generic class for storing properties that are explicitly specified
 * and implicitly determined by the compiler.
 * This is important for scale/axis/legend merging as
 * we want to prioritize properties that users explicitly specified.
 */
// eslint-disable-next-line @typescript-eslint/ban-types
class extension_Split {
    constructor(explicit = {}, implicit = {}) {
        this.explicit = explicit;
        this.implicit = implicit;
    }
    clone() {
        return new extension_Split(extension_duplicate(this.explicit), extension_duplicate(this.implicit));
    }
    combine() {
        return {
            ...this.explicit, // Explicit properties comes first
            ...this.implicit
        };
    }
    get(key) {
        // Explicit has higher precedence
        return extension_getFirstDefined(this.explicit[key], this.implicit[key]);
    }
    getWithExplicit(key) {
        // Explicit has higher precedence
        if (this.explicit[key] !== undefined) {
            return { explicit: true, value: this.explicit[key] };
        }
        else if (this.implicit[key] !== undefined) {
            return { explicit: false, value: this.implicit[key] };
        }
        return { explicit: false, value: undefined };
    }
    setWithExplicit(key, { value, explicit }) {
        if (value !== undefined) {
            this.set(key, value, explicit);
        }
    }
    set(key, value, explicit) {
        delete this[explicit ? 'implicit' : 'explicit'][key];
        this[explicit ? 'explicit' : 'implicit'][key] = value;
        return this;
    }
    copyKeyFromSplit(key, { explicit, implicit }) {
        // Explicit has higher precedence
        if (explicit[key] !== undefined) {
            this.set(key, explicit[key], true);
        }
        else if (implicit[key] !== undefined) {
            this.set(key, implicit[key], false);
        }
    }
    copyKeyFromObject(key, s) {
        // Explicit has higher precedence
        if (s[key] !== undefined) {
            this.set(key, s[key], true);
        }
    }
    /**
     * Merge split object into this split object. Properties from the other split
     * overwrite properties from this split.
     */
    copyAll(other) {
        for (const key of extension_util_keys(other.combine())) {
            const val = other.getWithExplicit(key);
            this.setWithExplicit(key, val);
        }
    }
}
function extension_makeExplicit(value) {
    return {
        explicit: true,
        value
    };
}
function extension_makeImplicit(value) {
    return {
        explicit: false,
        value
    };
}
function extension_tieBreakByComparing(compare) {
    return (v1, v2, property, propertyOf) => {
        const diff = compare(v1.value, v2.value);
        if (diff > 0) {
            return v1;
        }
        else if (diff < 0) {
            return v2;
        }
        return extension_defaultTieBreaker(v1, v2, property, propertyOf);
    };
}
function extension_defaultTieBreaker(v1, v2, property, propertyOf) {
    if (v1.explicit && v2.explicit) {
        extension_log_warn(extension_mergeConflictingProperty(property, propertyOf, v1.value, v2.value));
    }
    // If equal score, prefer v1.
    return v1;
}
function extension_mergeValuesWithExplicit(v1, v2, property, propertyOf, tieBreaker = extension_defaultTieBreaker) {
    if (v1 === undefined || v1.value === undefined) {
        // For first run
        return v2;
    }
    if (v1.explicit && !v2.explicit) {
        return v1;
    }
    else if (v2.explicit && !v1.explicit) {
        return v2;
    }
    else if (extension_util_deepEqual(v1.value, v2.value)) {
        return v1;
    }
    else {
        return tieBreaker(v1, v2, property, propertyOf);
    }
}
//# sourceMappingURL=split.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/index.js

/**
 * Class to track interesting properties (see https://15721.courses.cs.cmu.edu/spring2016/papers/graefe-ieee1995.pdf)
 * about how fields have been parsed or whether they have been derived in a transform. We use this to not parse the
 * same field again (or differently).
 */
class extension_AncestorParse extends extension_Split {
    constructor(explicit = {}, implicit = {}, parseNothing = false) {
        super(explicit, implicit);
        this.explicit = explicit;
        this.implicit = implicit;
        this.parseNothing = parseNothing;
    }
    clone() {
        const clone = super.clone();
        clone.parseNothing = this.parseNothing;
        return clone;
    }
}
//# sourceMappingURL=index.js.map
;// ../../node_modules/vega-lite/build/src/data.js

function extension_isUrlData(data) {
    return extension_util_hasProperty(data, 'url');
}
function extension_isInlineData(data) {
    return extension_util_hasProperty(data, 'values');
}
function extension_isNamedData(data) {
    return extension_util_hasProperty(data, 'name') && !extension_isUrlData(data) && !extension_isInlineData(data) && !extension_isGenerator(data);
}
function extension_isGenerator(data) {
    return data && (extension_isSequenceGenerator(data) || extension_isSphereGenerator(data) || extension_isGraticuleGenerator(data));
}
function extension_isSequenceGenerator(data) {
    return extension_util_hasProperty(data, 'sequence');
}
function extension_isSphereGenerator(data) {
    return extension_util_hasProperty(data, 'sphere');
}
function extension_isGraticuleGenerator(data) {
    return extension_util_hasProperty(data, 'graticule');
}
var extension_DataSourceType;
(function (DataSourceType) {
    DataSourceType[DataSourceType["Raw"] = 0] = "Raw";
    /** Main data source for marks */
    DataSourceType[DataSourceType["Main"] = 1] = "Main";
    DataSourceType[DataSourceType["Row"] = 2] = "Row";
    DataSourceType[DataSourceType["Column"] = 3] = "Column";
    DataSourceType[DataSourceType["Lookup"] = 4] = "Lookup";
    /** Pre-filter-invalid data source for scale domains */
    DataSourceType[DataSourceType["PreFilterInvalid"] = 5] = "PreFilterInvalid";
    /** Post-filter-invalid data source for scale domains */
    DataSourceType[DataSourceType["PostFilterInvalid"] = 6] = "PostFilterInvalid";
})(extension_DataSourceType || (extension_DataSourceType = {}));
//# sourceMappingURL=data.js.map
;// ../../node_modules/vega-lite/build/src/compile/invalid/datasources.js


function extension_getDataSourcesForHandlingInvalidValues({ invalid, isPath }) {
    const normalizedInvalid = extension_normalizeInvalidDataMode(invalid, { isPath });
    switch (normalizedInvalid) {
        case 'filter':
            // Both marks and scales use post-filter data
            return {
                marks: 'exclude-invalid-values',
                scales: 'exclude-invalid-values'
            };
        case 'break-paths-show-domains':
            return {
                // Path-based marks use pre-filter data so we know to skip these invalid points in the path.
                // For non-path based marks, we skip by not showing them at all.
                marks: isPath ? 'include-invalid-values' : 'exclude-invalid-values',
                scales: 'include-invalid-values'
            };
        case 'break-paths-filter-domains':
            // For path marks, the marks will use unfiltered data (and skip points). But we need a separate data sources to feed the domain.
            // For non-path marks, we can use the filtered data for both marks and scales.
            return {
                marks: isPath ? 'include-invalid-values' : 'exclude-invalid-values',
                // Unlike 'break-paths-show-domains', 'break-paths-filter-domains' uses post-filter data to feed scale.
                scales: 'exclude-invalid-values'
            };
        case 'show':
            return {
                marks: 'include-invalid-values',
                scales: 'include-invalid-values'
            };
    }
}
function extension_getScaleDataSourceForHandlingInvalidValues(props) {
    const { marks, scales } = extension_getDataSourcesForHandlingInvalidValues(props);
    if (marks === scales) {
        // If both marks and scales use the same data, there is only the main data source.
        return extension_DataSourceType.Main;
    }
    // If marks and scales use differetnt data, return the pre/post-filter data source accordingly.
    return scales === 'include-invalid-values' ? extension_DataSourceType.PreFilterInvalid : extension_DataSourceType.PostFilterInvalid;
}
//# sourceMappingURL=datasources.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/dataflow.js


/**
 * A node in the dataflow tree.
 */
class extension_DataFlowNode {
    constructor(parent, debugName) {
        this.debugName = debugName;
        this._children = [];
        this._parent = null;
        if (parent) {
            this.parent = parent;
        }
    }
    /**
     * Clone this node with a deep copy but don't clone links to children or parents.
     */
    clone() {
        throw new Error('Cannot clone node');
    }
    get parent() {
        return this._parent;
    }
    /**
     * Set the parent of the node and also add this node to the parent's children.
     */
    set parent(parent) {
        this._parent = parent;
        if (parent) {
            parent.addChild(this);
        }
    }
    get children() {
        return this._children;
    }
    numChildren() {
        return this._children.length;
    }
    addChild(child, loc) {
        // do not add the same child twice
        if (this._children.includes(child)) {
            extension_log_warn(extension_ADD_SAME_CHILD_TWICE);
            return;
        }
        if (loc !== undefined) {
            this._children.splice(loc, 0, child);
        }
        else {
            this._children.push(child);
        }
    }
    removeChild(oldChild) {
        const loc = this._children.indexOf(oldChild);
        this._children.splice(loc, 1);
        return loc;
    }
    /**
     * Remove node from the dataflow.
     */
    remove() {
        let loc = this._parent.removeChild(this);
        for (const child of this._children) {
            // do not use the set method because we want to insert at a particular location
            child._parent = this._parent;
            this._parent.addChild(child, loc++);
        }
    }
    /**
     * Insert another node as a parent of this node.
     */
    insertAsParentOf(other) {
        const parent = other.parent;
        parent.removeChild(this);
        this.parent = parent;
        other.parent = this;
    }
    swapWithParent() {
        const parent = this._parent;
        const newParent = parent.parent;
        // reconnect the children
        for (const child of this._children) {
            child.parent = parent;
        }
        // remove old links
        this._children = []; // equivalent to removing every child link one by one
        parent.removeChild(this);
        const loc = parent.parent.removeChild(parent);
        // swap two nodes but maintain order in children
        this._parent = newParent;
        newParent.addChild(this, loc);
        parent.parent = this;
    }
}
class extension_OutputNode extends extension_DataFlowNode {
    clone() {
        const cloneObj = new this.constructor();
        cloneObj.debugName = `clone_${this.debugName}`;
        cloneObj._source = this._source;
        cloneObj._name = `clone_${this._name}`;
        cloneObj.type = this.type;
        cloneObj.refCounts = this.refCounts;
        cloneObj.refCounts[cloneObj._name] = 0;
        return cloneObj;
    }
    /**
     * @param source The name of the source. Will change in assemble.
     * @param type The type of the output node.
     * @param refCounts A global ref counter map.
     */
    constructor(parent, source, type, refCounts) {
        super(parent, source);
        this.type = type;
        this.refCounts = refCounts;
        this._source = this._name = source;
        if (this.refCounts && !(this._name in this.refCounts)) {
            this.refCounts[this._name] = 0;
        }
    }
    dependentFields() {
        return new Set();
    }
    producedFields() {
        return new Set();
    }
    hash() {
        if (this._hash === undefined) {
            this._hash = `Output ${extension_uniqueId()}`;
        }
        return this._hash;
    }
    /**
     * Request the datasource name and increase the ref counter.
     *
     * During the parsing phase, this will return the simple name such as 'main' or 'raw'.
     * It is crucial to request the name from an output node to mark it as a required node.
     * If nobody ever requests the name, this datasource will not be instantiated in the assemble phase.
     *
     * In the assemble phase, this will return the correct name.
     */
    getSource() {
        this.refCounts[this._name]++;
        return this._source;
    }
    isRequired() {
        return !!this.refCounts[this._name];
    }
    setSource(source) {
        this._source = source;
    }
}
//# sourceMappingURL=dataflow.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/timeunit.js







function extension_isTimeUnitTransformComponent(timeUnitComponent) {
    return timeUnitComponent.as !== undefined;
}
function extension_offsetAs(field) {
    return `${field}_end`;
}
class extension_TimeUnitNode extends extension_DataFlowNode {
    clone() {
        return new extension_TimeUnitNode(null, extension_duplicate(this.timeUnits));
    }
    constructor(parent, timeUnits) {
        super(parent);
        this.timeUnits = timeUnits;
    }
    static makeFromEncoding(parent, model) {
        const formula = model.reduceFieldDef((timeUnitComponent, fieldDef, channel) => {
            const { field, timeUnit } = fieldDef;
            if (timeUnit) {
                let component;
                if (extension_isBinnedTimeUnit(timeUnit)) {
                    // For binned time unit, only produce end if the mark is a rect-based mark (rect, bar, image, arc), which needs "range".
                    if (extension_isUnitModel(model)) {
                        const { mark, markDef, config } = model;
                        const bandPosition = extension_getBandPosition({ fieldDef, markDef, config });
                        if (extension_isRectBasedMark(mark) || !!bandPosition) {
                            component = {
                                timeUnit: extension_normalizeTimeUnit(timeUnit),
                                field
                            };
                        }
                    }
                }
                else {
                    component = {
                        as: extension_vgField(fieldDef, { forAs: true }),
                        field,
                        timeUnit
                    };
                }
                if (extension_isUnitModel(model)) {
                    const { mark, markDef, config } = model;
                    const bandPosition = extension_getBandPosition({ fieldDef, markDef, config });
                    if (extension_isRectBasedMark(mark) && extension_isXorY(channel) && bandPosition !== 0.5) {
                        component.rectBandPosition = bandPosition;
                    }
                }
                if (component) {
                    timeUnitComponent[extension_util_hash(component)] = component;
                }
            }
            return timeUnitComponent;
        }, {});
        if (extension_isEmpty(formula)) {
            return null;
        }
        return new extension_TimeUnitNode(parent, formula);
    }
    static makeFromTransform(parent, t) {
        const { timeUnit, ...other } = { ...t };
        const normalizedTimeUnit = extension_normalizeTimeUnit(timeUnit);
        const component = {
            ...other,
            timeUnit: normalizedTimeUnit
        };
        return new extension_TimeUnitNode(parent, {
            [extension_util_hash(component)]: component
        });
    }
    /**
     * Merge together TimeUnitNodes assigning the children of `other` to `this`
     * and removing `other`.
     */
    merge(other) {
        this.timeUnits = { ...this.timeUnits };
        // if the same hash happen twice, merge
        for (const key in other.timeUnits) {
            if (!this.timeUnits[key]) {
                // copy if it's not a duplicate
                this.timeUnits[key] = other.timeUnits[key];
            }
        }
        for (const child of other.children) {
            other.removeChild(child);
            child.parent = this;
        }
        other.remove();
    }
    /**
     * Remove time units coming from the other node.
     */
    removeFormulas(fields) {
        const newFormula = {};
        for (const [key, timeUnitComponent] of extension_util_entries(this.timeUnits)) {
            const fieldAs = extension_isTimeUnitTransformComponent(timeUnitComponent)
                ? timeUnitComponent.as
                : `${timeUnitComponent.field}_end`;
            if (!fields.has(fieldAs)) {
                newFormula[key] = timeUnitComponent;
            }
        }
        this.timeUnits = newFormula;
    }
    producedFields() {
        return new Set(extension_vals(this.timeUnits).map(f => {
            return extension_isTimeUnitTransformComponent(f) ? f.as : extension_offsetAs(f.field);
        }));
    }
    dependentFields() {
        return new Set(extension_vals(this.timeUnits).map(f => f.field));
    }
    hash() {
        return `TimeUnit ${extension_util_hash(this.timeUnits)}`;
    }
    assemble() {
        const transforms = [];
        for (const f of extension_vals(this.timeUnits)) {
            const { rectBandPosition } = f;
            const normalizedTimeUnit = extension_normalizeTimeUnit(f.timeUnit);
            if (extension_isTimeUnitTransformComponent(f)) {
                const { field, as } = f;
                const { unit, utc, ...params } = normalizedTimeUnit;
                const startEnd = [as, `${as}_end`];
                transforms.push({
                    field: extension_replacePathInField(field),
                    type: 'timeunit',
                    ...(unit ? { units: extension_getTimeUnitParts(unit) } : {}),
                    ...(utc ? { timezone: 'utc' } : {}),
                    ...params,
                    as: startEnd
                });
                transforms.push(...extension_offsetedRectFormulas(startEnd, rectBandPosition, normalizedTimeUnit));
            }
            else if (f) {
                const { field: escapedField } = f;
                // since this is a expression, we want the unescaped field name
                const field = escapedField.replaceAll('\\.', '.');
                const expr = extension_offsetExpr({ timeUnit: normalizedTimeUnit, field });
                const endAs = extension_offsetAs(field);
                transforms.push({
                    type: 'formula',
                    expr,
                    as: endAs
                });
                transforms.push(...extension_offsetedRectFormulas([field, endAs], rectBandPosition, normalizedTimeUnit));
            }
        }
        return transforms;
    }
}
const extension_OFFSETTED_RECT_START_SUFFIX = 'offsetted_rect_start';
const extension_OFFSETTED_RECT_END_SUFFIX = 'offsetted_rect_end';
function extension_offsetExpr({ timeUnit, field, reverse }) {
    const { unit, utc } = timeUnit;
    const smallestUnit = extension_getSmallestTimeUnitPart(unit);
    const { part, step } = extension_getDateTimePartAndStep(smallestUnit, timeUnit.step);
    const offsetFn = utc ? 'utcOffset' : 'timeOffset';
    const expr = `${offsetFn}('${part}', ${extension_accessWithDatumToUnescapedPath(field)}, ${reverse ? -step : step})`;
    return expr;
}
function extension_offsetedRectFormulas([startField, endField], rectBandPosition, timeUnit) {
    if (rectBandPosition !== undefined && rectBandPosition !== 0.5) {
        const startExpr = extension_accessWithDatumToUnescapedPath(startField);
        const endExpr = extension_accessWithDatumToUnescapedPath(endField);
        return [
            {
                type: 'formula',
                expr: extension_interpolateExpr([
                    extension_offsetExpr({
                        timeUnit,
                        field: startField,
                        reverse: true
                    }),
                    startExpr
                ], rectBandPosition + 0.5),
                as: `${startField}_${extension_OFFSETTED_RECT_START_SUFFIX}`
            },
            {
                type: 'formula',
                expr: extension_interpolateExpr([startExpr, endExpr], rectBandPosition + 0.5),
                as: `${startField}_${extension_OFFSETTED_RECT_END_SUFFIX}`
            }
        ];
    }
    return [];
}
function extension_interpolateExpr([start, end], fraction) {
    return `${1 - fraction} * ${start} + ${fraction} * ${end}`;
}
//# sourceMappingURL=timeunit.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/project.js









const extension_TUPLE_FIELDS = '_tuple_fields';
class extension_SelectionProjectionComponent {
    constructor(...items) {
        this.items = items;
        this.hasChannel = {};
        this.hasField = {};
        this.hasSelectionId = false;
    }
}
const extension_project_project = {
    defined: () => {
        return true; // This transform handles its own defaults, so always run parse.
    },
    parse: (model, selCmpt, selDef) => {
        const name = selCmpt.name;
        const proj = (selCmpt.project ?? (selCmpt.project = new extension_SelectionProjectionComponent()));
        const parsed = {};
        const timeUnits = {};
        const signals = new Set();
        const signalName = (p, range) => {
            const suffix = range === 'visual' ? p.channel : p.field;
            let sg = extension_varName(`${name}_${suffix}`);
            for (let counter = 1; signals.has(sg); counter++) {
                sg = extension_varName(`${name}_${suffix}_${counter}`);
            }
            signals.add(sg);
            return { [range]: sg };
        };
        const type = selCmpt.type;
        const cfg = model.config.selection[type];
        const init = selDef.value !== undefined
            ? extension_vega_util_module_array(selDef.value)
            : null;
        // If no explicit projection (either fields or encodings) is specified, set some defaults.
        // If an initial value is set, try to infer projections.
        let { fields, encodings } = (extension_vega_util_module_isObject(selDef.select) ? selDef.select : {});
        if (!fields && !encodings && init) {
            for (const initVal of init) {
                // initVal may be a scalar value to smoothen varParam -> pointSelection gradient.
                if (!extension_vega_util_module_isObject(initVal)) {
                    continue;
                }
                for (const key of extension_util_keys(initVal)) {
                    if (extension_isSingleDefUnitChannel(key)) {
                        (encodings || (encodings = [])).push(key);
                    }
                    else {
                        if (type === 'interval') {
                            extension_log_warn(extension_INTERVAL_INITIALIZED_WITH_POS);
                            encodings = cfg.encodings;
                        }
                        else {
                            (fields ?? (fields = [])).push(key);
                        }
                    }
                }
            }
        }
        // If no initial value is specified, use the default configuration.
        // We break this out as a separate if block (instead of an else condition)
        // to account for unprojected point selections that have scalar initial values
        if (!fields && !encodings) {
            encodings = cfg.encodings;
            if ('fields' in cfg) {
                fields = cfg.fields;
            }
        }
        for (const channel of encodings ?? []) {
            const fieldDef = model.fieldDef(channel);
            if (fieldDef) {
                let field = fieldDef.field;
                if (fieldDef.aggregate) {
                    extension_log_warn(extension_cannotProjectAggregate(channel, fieldDef.aggregate));
                    continue;
                }
                else if (!field) {
                    extension_log_warn(extension_cannotProjectOnChannelWithoutField(channel));
                    continue;
                }
                if (fieldDef.timeUnit && !extension_isBinnedTimeUnit(fieldDef.timeUnit)) {
                    field = model.vgField(channel);
                    // Construct TimeUnitComponents which will be combined into a
                    // TimeUnitNode. This node may need to be inserted into the
                    // dataflow if the selection is used across views that do not
                    // have these time units defined.
                    const component = {
                        timeUnit: fieldDef.timeUnit,
                        as: field,
                        field: fieldDef.field
                    };
                    timeUnits[extension_util_hash(component)] = component;
                }
                // Prevent duplicate projections on the same field.
                // TODO: what if the same field is bound to multiple channels (e.g., SPLOM diag).
                if (!parsed[field]) {
                    // Determine whether the tuple will store enumerated or ranged values.
                    // Interval selections store ranges for continuous scales, and enumerations otherwise.
                    // Single/multi selections store ranges for binned fields, and enumerations otherwise.
                    const tplType = type === 'interval' &&
                        extension_isScaleChannel(channel) &&
                        extension_hasContinuousDomain(model.getScaleComponent(channel).get('type'))
                        ? 'R'
                        : fieldDef.bin
                            ? 'R-RE'
                            : 'E';
                    const p = { field, channel, type: tplType, index: proj.items.length };
                    p.signals = { ...signalName(p, 'data'), ...signalName(p, 'visual') };
                    proj.items.push((parsed[field] = p));
                    proj.hasField[field] = parsed[field];
                    proj.hasSelectionId = proj.hasSelectionId || field === extension_SELECTION_ID;
                    if (extension_isGeoPositionChannel(channel)) {
                        p.geoChannel = channel;
                        p.channel = extension_getPositionChannelFromLatLong(channel);
                        proj.hasChannel[p.channel] = parsed[field];
                    }
                    else {
                        proj.hasChannel[channel] = parsed[field];
                    }
                }
            }
            else {
                extension_log_warn(extension_cannotProjectOnChannelWithoutField(channel));
            }
        }
        for (const field of fields ?? []) {
            if (proj.hasField[field])
                continue;
            const p = { type: 'E', field, index: proj.items.length };
            p.signals = { ...signalName(p, 'data') };
            proj.items.push(p);
            proj.hasField[field] = p;
            proj.hasSelectionId = proj.hasSelectionId || field === extension_SELECTION_ID;
        }
        if (init) {
            selCmpt.init = init.map((v) => {
                // Selections can be initialized either with a full object that maps projections to values
                // or scalar values to smoothen the abstraction gradient from variable params to point selections.
                return proj.items.map(p => extension_vega_util_module_isObject(v) ? (v[p.geoChannel || p.channel] !== undefined ? v[p.geoChannel || p.channel] : v[p.field]) : v);
            });
        }
        if (!extension_isEmpty(timeUnits)) {
            proj.timeUnit = new extension_TimeUnitNode(null, timeUnits);
        }
    },
    signals: (model, selCmpt, allSignals) => {
        const name = selCmpt.name + extension_TUPLE_FIELDS;
        const hasSignal = allSignals.filter(s => s.name === name);
        return hasSignal.length > 0 || selCmpt.project.hasSelectionId
            ? allSignals
            : allSignals.concat({
                name,
                value: selCmpt.project.items.map(extension_assembleProjection)
            });
    }
};
/* harmony default export */ const extension_selection_project = (extension_project_project);
//# sourceMappingURL=project.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/point.js







const extension_CURR = '_curr';
const extension_ANIM_VALUE = 'anim_value';
const extension_ANIM_CLOCK = 'anim_clock';
const extension_EASED_ANIM_CLOCK = 'eased_anim_clock';
const extension_MIN_EXTENT = 'min_extent';
const extension_MAX_RANGE_EXTENT = 'max_range_extent';
const extension_LAST_TICK = 'last_tick_at';
const extension_IS_PLAYING = 'is_playing';
const extension_THROTTLE = (1 / 60) * 1000; // 60 FPS
const extension_animationSignals = (selectionName, scaleName) => {
    return [
        // timer signals
        {
            name: extension_EASED_ANIM_CLOCK,
            // update: 'easeLinear(anim_clock / max_range_extent) * max_range_extent'
            update: extension_ANIM_CLOCK // TODO: replace with above once easing functions are implemented in vega-functions
        },
        // scale signals
        // TODO(jzong): uncomment commented signals below when implementing interpolation
        { name: `${selectionName}_domain`, init: `domain('${scaleName}')` },
        { name: extension_MIN_EXTENT, init: `extent(${selectionName}_domain)[0]` },
        // {name: 'max_extent', init: `extent(${selectionName}_domain)[1]`},
        { name: extension_MAX_RANGE_EXTENT, init: `extent(range('${scaleName}'))[1]` },
        // {name: 't_index', update: `indexof(${selectionName}_domain, anim_value)`},
        { name: extension_ANIM_VALUE, update: `invert('${scaleName}', ${extension_EASED_ANIM_CLOCK})` }
    ];
};
const extension_point_point = {
    defined: selCmpt => selCmpt.type === 'point',
    topLevelSignals: (model, selCmpt, signals) => {
        if (extension_isTimerSelection(selCmpt)) {
            signals = signals.concat([
                {
                    name: extension_ANIM_CLOCK,
                    init: '0',
                    on: [
                        {
                            events: { type: 'timer', throttle: extension_THROTTLE },
                            update: `${extension_IS_PLAYING} ? (${extension_ANIM_CLOCK} + (now() - ${extension_LAST_TICK}) > ${extension_MAX_RANGE_EXTENT} ? 0 : ${extension_ANIM_CLOCK} + (now() - ${extension_LAST_TICK})) : ${extension_ANIM_CLOCK}`
                        }
                    ]
                },
                {
                    name: extension_LAST_TICK,
                    init: 'now()',
                    on: [{ events: [{ signal: extension_ANIM_CLOCK }, { signal: extension_IS_PLAYING }], update: 'now()' }]
                },
                {
                    name: extension_IS_PLAYING,
                    init: 'true'
                }
            ]);
        }
        return signals;
    },
    signals: (model, selCmpt, signals) => {
        const name = selCmpt.name;
        const fieldsSg = name + extension_TUPLE_FIELDS;
        const project = selCmpt.project;
        const datum = '(item().isVoronoi ? datum.datum : datum)';
        // Only add a discrete selection to the store if a datum is present _and_
        // the interaction isn't occurring on a group mark. This guards against
        // polluting interactive state with invalid values in faceted displays
        // as the group marks are also data-driven. We force the update to account
        // for constant null states but varying toggles (e.g., shift-click in
        // whitespace followed by a click in whitespace; the store should only
        // be cleared on the second click).
        const brushes = extension_vals(model.component.selection ?? {})
            .reduce((acc, cmpt) => {
            return cmpt.type === 'interval' ? acc.concat(cmpt.name + extension_BRUSH) : acc;
        }, [])
            .map(b => `indexof(item().mark.name, '${b}') < 0`)
            .join(' && ');
        const test = `datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0${brushes ? ` && ${brushes}` : ''}`;
        let update = `unit: ${extension_unitName(model)}, `;
        if (selCmpt.project.hasSelectionId) {
            update += `${extension_SELECTION_ID}: ${datum}[${extension_$(extension_SELECTION_ID)}]`;
        }
        else if (extension_isTimerSelection(selCmpt)) {
            update += `fields: ${fieldsSg}, values: [${extension_ANIM_VALUE} ? ${extension_ANIM_VALUE} : ${extension_MIN_EXTENT}]`;
        }
        else {
            const values = project.items
                .map(p => {
                const fieldDef = model.fieldDef(p.channel);
                // Binned fields should capture extents, for a range test against the raw field.
                return fieldDef?.bin
                    ? `[${datum}[${extension_$(model.vgField(p.channel, {}))}], ` +
                        `${datum}[${extension_$(model.vgField(p.channel, { binSuffix: 'end' }))}]]`
                    : `${datum}[${extension_$(p.field)}]`;
            })
                .join(', ');
            update += `fields: ${fieldsSg}, values: [${values}]`;
        }
        if (extension_isTimerSelection(selCmpt)) {
            // timer event: selection is for animation
            return signals.concat(extension_animationSignals(selCmpt.name, model.scaleName(extension_TIME)), [
                {
                    name: name + extension_TUPLE,
                    on: [
                        {
                            events: [{ signal: extension_EASED_ANIM_CLOCK }, { signal: extension_ANIM_VALUE }],
                            update: `{${update}}`,
                            force: true
                        }
                    ]
                }
            ]);
        }
        else {
            const events = selCmpt.events;
            return signals.concat([
                {
                    name: name + extension_TUPLE,
                    on: events
                        ? [
                            {
                                events,
                                update: `${test} ? {${update}} : null`,
                                force: true
                            }
                        ]
                        : []
                }
            ]);
        }
    }
};
/* harmony default export */ const extension_selection_point = (extension_point_point);
//# sourceMappingURL=point.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/assemble.js











function extension_assembleProjection(proj) {
    const { signals, hasLegend, index, ...rest } = proj;
    rest.field = extension_replacePathInField(rest.field);
    return rest;
}
function extension_assembleInit(init, isExpr = true, wrap = extension_vega_util_module_identity) {
    if (extension_vega_util_module_isArray(init)) {
        const assembled = init.map(v => extension_assembleInit(v, isExpr, wrap));
        return isExpr ? `[${assembled.join(', ')}]` : assembled;
    }
    else if (extension_isDateTime(init)) {
        if (isExpr) {
            return wrap(extension_dateTimeToExpr(init));
        }
        else {
            return wrap(extension_dateTimeToTimestamp(init));
        }
    }
    return isExpr ? wrap(extension_util_stringify(init)) : init;
}
function extension_assembleUnitSelectionSignals(model, signals) {
    for (const selCmpt of extension_vals(model.component.selection ?? {})) {
        const name = selCmpt.name;
        let modifyExpr = `${name}${extension_TUPLE}, ${selCmpt.resolve === 'global' ? 'true' : `{unit: ${extension_unitName(model)}}`}`;
        for (const c of extension_selectionCompilers) {
            if (!c.defined(selCmpt))
                continue;
            if (c.signals)
                signals = c.signals(model, selCmpt, signals);
            if (c.modifyExpr)
                modifyExpr = c.modifyExpr(model, selCmpt, modifyExpr);
        }
        signals.push({
            name: name + extension_MODIFY,
            on: [
                {
                    events: { signal: selCmpt.name + extension_TUPLE },
                    update: `modify(${extension_$(selCmpt.name + extension_STORE)}, ${modifyExpr})`
                }
            ]
        });
    }
    return extension_cleanupEmptyOnArray(signals);
}
function extension_assembleFacetSignals(model, signals) {
    if (model.component.selection && extension_util_keys(model.component.selection).length) {
        const name = extension_$(model.getName('cell'));
        signals.unshift({
            name: 'facet',
            value: {},
            on: [
                {
                    events: extension_eventSelector('pointermove', 'scope'),
                    update: `isTuple(facet) ? facet : group(${name}).datum`
                }
            ]
        });
    }
    return extension_cleanupEmptyOnArray(signals);
}
function extension_assembleTopLevelSignals(model, signals) {
    let hasSelections = false;
    for (const selCmpt of extension_vals(model.component.selection ?? {})) {
        const name = selCmpt.name;
        const store = extension_$(name + extension_STORE);
        const hasSg = signals.filter(s => s.name === name);
        if (hasSg.length === 0) {
            const resolve = selCmpt.resolve === 'global' ? 'union' : selCmpt.resolve;
            const isPoint = selCmpt.type === 'point' ? ', true, true)' : ')';
            signals.push({
                name: selCmpt.name,
                update: `${extension_VL_SELECTION_RESOLVE}(${store}, ${extension_$(resolve)}${isPoint}`
            });
        }
        hasSelections = true;
        for (const c of extension_selectionCompilers) {
            if (c.defined(selCmpt) && c.topLevelSignals) {
                signals = c.topLevelSignals(model, selCmpt, signals);
            }
        }
    }
    if (hasSelections) {
        const hasUnit = signals.filter(s => s.name === 'unit');
        if (hasUnit.length === 0) {
            signals.unshift({
                name: 'unit',
                value: {},
                on: [{ events: 'pointermove', update: 'isTuple(group()) ? group() : unit' }]
            });
        }
    }
    return extension_cleanupEmptyOnArray(signals);
}
function extension_assembleUnitSelectionData(model, data) {
    const selectionData = [];
    const animationData = [];
    const unit = extension_unitName(model, { escape: false });
    for (const selCmpt of extension_vals(model.component.selection ?? {})) {
        const store = { name: selCmpt.name + extension_STORE };
        if (selCmpt.project.hasSelectionId) {
            store.transform = [{ type: 'collect', sort: { field: extension_SELECTION_ID } }];
        }
        if (selCmpt.init) {
            const fields = selCmpt.project.items.map(extension_assembleProjection);
            store.values = selCmpt.project.hasSelectionId
                ? selCmpt.init.map(i => ({ unit, [extension_SELECTION_ID]: extension_assembleInit(i, false)[0] }))
                : selCmpt.init.map(i => ({ unit, fields, values: extension_assembleInit(i, false) }));
        }
        const contains = [...selectionData, ...data].filter(d => d.name === selCmpt.name + extension_STORE);
        if (!contains.length) {
            selectionData.push(store);
        }
        if (extension_isTimerSelection(selCmpt) && data.length) {
            // TODO(jzong): eventually uncomment this stuff when we want to support multi-view
            // const sourceName =
            //   model.parent && model.parent.type !== 'unit' // facet, layer, or concat
            //     ? model.parent.lookupDataSource(model.parent.getDataName(DataSourceType.Main))
            //     : model.lookupDataSource(model.getDataName(DataSourceType.Main));
            const sourceName = model.lookupDataSource(model.getDataName(extension_DataSourceType.Main));
            const sourceData = data.find(d => d.name === sourceName);
            // find the filter transform for the current selection
            const sourceDataFilter = sourceData.transform.find(t => t.type === 'filter' && t.expr.includes('vlSelectionTest'));
            if (sourceDataFilter) {
                // remove it from the original dataset
                sourceData.transform = sourceData.transform.filter(t => t !== sourceDataFilter);
                // create dataset to hold current animation frame
                const currentFrame = {
                    name: sourceData.name + extension_CURR,
                    source: sourceData.name,
                    transform: [sourceDataFilter] // add the selection filter to the animation dataset
                };
                animationData.push(currentFrame);
            }
        }
    }
    return selectionData.concat(data, animationData);
}
function extension_assembleUnitSelectionMarks(model, marks) {
    for (const selCmpt of extension_vals(model.component.selection ?? {})) {
        for (const c of extension_selectionCompilers) {
            if (c.defined(selCmpt) && c.marks) {
                marks = c.marks(model, selCmpt, marks);
            }
        }
    }
    return marks;
}
function extension_assembleLayerSelectionMarks(model, marks) {
    for (const child of model.children) {
        if (extension_isUnitModel(child)) {
            marks = extension_assembleUnitSelectionMarks(child, marks);
        }
    }
    return marks;
}
function extension_assembleSelectionScaleDomain(model, extent, scaleCmpt, domain) {
    const parsedExtent = extension_parseSelectionExtent(model, extent.param, extent);
    return {
        signal: extension_hasContinuousDomain(scaleCmpt.get('type')) && extension_vega_util_module_isArray(domain) && domain[0] > domain[1]
            ? `isValid(${parsedExtent}) && reverse(${parsedExtent})`
            : parsedExtent
    };
}
function extension_cleanupEmptyOnArray(signals) {
    return signals.map(s => {
        if (s.on && !s.on.length)
            delete s.on;
        return s;
    });
}
//# sourceMappingURL=assemble.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/scales.js







const extension_scaleBindings = {
    defined: selCmpt => {
        return selCmpt.type === 'interval' && selCmpt.resolve === 'global' && selCmpt.bind && selCmpt.bind === 'scales';
    },
    parse: (model, selCmpt) => {
        const bound = (selCmpt.scales = []);
        for (const proj of selCmpt.project.items) {
            const channel = proj.channel;
            if (!extension_isScaleChannel(channel)) {
                continue;
            }
            const scale = model.getScaleComponent(channel);
            const scaleType = scale ? scale.get('type') : undefined;
            if (scaleType == 'sequential') {
                extension_log_warn(extension_SEQUENTIAL_SCALE_DEPRECATED);
            }
            if (!scale || !extension_hasContinuousDomain(scaleType)) {
                extension_log_warn(extension_SCALE_BINDINGS_CONTINUOUS);
                continue;
            }
            scale.set('selectionExtent', { param: selCmpt.name, field: proj.field }, true);
            bound.push(proj);
        }
    },
    topLevelSignals: (model, selCmpt, signals) => {
        const bound = selCmpt.scales.filter(proj => signals.filter(s => s.name === proj.signals.data).length === 0);
        // Top-level signals are only needed for multiview displays and if this
        // view's top-level signals haven't already been generated.
        if (!model.parent || extension_isTopLevelLayer(model) || bound.length === 0) {
            return signals;
        }
        // vlSelectionResolve does not account for the behavior of bound scales in
        // multiview displays. Each unit view adds a tuple to the store, but the
        // state of the selection is the unit selection most recently updated. This
        // state is captured by the top-level signals that we insert and "push
        // outer" to from within the units. We need to reassemble this state into
        // the top-level named signal, except no single selCmpt has a global view.
        const namedSg = signals.find(s => s.name === selCmpt.name);
        let update = namedSg.update;
        if (update.includes(extension_VL_SELECTION_RESOLVE)) {
            namedSg.update = `{${bound
                .map(proj => `${extension_$(extension_replacePathInField(proj.field))}: ${proj.signals.data}`)
                .join(', ')}}`;
        }
        else {
            for (const proj of bound) {
                const mapping = `${extension_$(extension_replacePathInField(proj.field))}: ${proj.signals.data}`;
                if (!update.includes(mapping)) {
                    update = `${update.substring(0, update.length - 1)}, ${mapping}}`;
                }
            }
            namedSg.update = update;
        }
        return signals.concat(bound.map(proj => ({ name: proj.signals.data })));
    },
    signals: (model, selCmpt, signals) => {
        // Nested signals need only push to top-level signals with multiview displays.
        if (model.parent && !extension_isTopLevelLayer(model)) {
            for (const proj of selCmpt.scales) {
                const signal = signals.find(s => s.name === proj.signals.data);
                signal.push = 'outer';
                delete signal.value;
                delete signal.update;
            }
        }
        return signals;
    }
};
/* harmony default export */ const extension_selection_scales = (extension_scaleBindings);
function extension_scales_domain(model, channel) {
    const scale = extension_$(model.scaleName(channel));
    return `domain(${scale})`;
}
function extension_isTopLevelLayer(model) {
    return model.parent && extension_isLayerModel(model.parent) && (!model.parent.parent || extension_isTopLevelLayer(model.parent.parent));
}
//# sourceMappingURL=scales.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/interval.js












const extension_BRUSH = '_brush';
const extension_SCALE_TRIGGER = '_scale_trigger';
const extension_GEO_INIT_TICK = 'geo_interval_init_tick'; // Workaround for https://github.com/vega/vega/issues/3481
const extension_INIT = '_init';
const extension_interval_CENTER = '_center';
const extension_interval_interval = {
    defined: selCmpt => selCmpt.type === 'interval',
    parse: (model, selCmpt, selDef) => {
        var _a;
        if (model.hasProjection) {
            const def = { ...(extension_vega_util_module_isObject(selDef.select) ? selDef.select : {}) };
            def.fields = [extension_SELECTION_ID];
            if (!def.encodings) {
                // Remap default x/y projection
                def.encodings = selDef.value ? extension_util_keys(selDef.value) : [extension_LONGITUDE, extension_LATITUDE];
            }
            selDef.select = { type: 'interval', ...def };
        }
        if (selCmpt.translate && !extension_selection_scales.defined(selCmpt)) {
            const filterExpr = `!event.item || event.item.mark.name !== ${extension_$(selCmpt.name + extension_BRUSH)}`;
            for (const evt of selCmpt.events) {
                if (!evt.between) {
                    extension_log_warn(`${evt} is not an ordered event stream for interval selections.`);
                    continue;
                }
                const filters = extension_vega_util_module_array(((_a = evt.between[0]).filter ?? (_a.filter = [])));
                if (!filters.includes(filterExpr)) {
                    filters.push(filterExpr);
                }
            }
        }
    },
    signals: (model, selCmpt, signals) => {
        const name = selCmpt.name;
        const tupleSg = name + extension_TUPLE;
        const channels = extension_vals(selCmpt.project.hasChannel).filter(p => p.channel === extension_channel_X || p.channel === extension_channel_Y);
        const init = selCmpt.init ? selCmpt.init[0] : null;
        signals.push(...channels.reduce((arr, proj) => arr.concat(extension_channelSignals(model, selCmpt, proj, init && init[proj.index])), []));
        if (!model.hasProjection) {
            // Proxy scale reactions to ensure that an infinite loop doesn't occur
            // when an interval selection filter touches the scale.
            if (!extension_selection_scales.defined(selCmpt)) {
                const triggerSg = name + extension_SCALE_TRIGGER;
                const scaleTriggers = channels.map(proj => {
                    const channel = proj.channel;
                    const { data: dname, visual: vname } = proj.signals;
                    const scaleName = extension_$(model.scaleName(channel));
                    const scaleType = model.getScaleComponent(channel).get('type');
                    const toNum = extension_hasContinuousDomain(scaleType) ? '+' : '';
                    return (`(!isArray(${dname}) || ` +
                        `(${toNum}invert(${scaleName}, ${vname})[0] === ${toNum}${dname}[0] && ` +
                        `${toNum}invert(${scaleName}, ${vname})[1] === ${toNum}${dname}[1]))`);
                });
                if (scaleTriggers.length) {
                    signals.push({
                        name: triggerSg,
                        value: {},
                        on: [
                            {
                                events: channels.map(proj => ({ scale: model.scaleName(proj.channel) })),
                                update: scaleTriggers.join(' && ') + ` ? ${triggerSg} : {}`
                            }
                        ]
                    });
                }
            }
            // Only add an interval to the store if it has valid data extents. Data extents
            // are set to null if pixel extents are equal to account for intervals over
            // ordinal/nominal domains which, when inverted, will still produce a valid datum.
            const dataSignals = channels.map(proj => proj.signals.data);
            const update = `unit: ${extension_unitName(model)}, fields: ${name + extension_TUPLE_FIELDS}, values`;
            return signals.concat({
                name: tupleSg,
                ...(init ? { init: `{${update}: ${extension_assembleInit(init)}}` } : {}),
                ...(dataSignals.length
                    ? {
                        on: [
                            {
                                events: [{ signal: dataSignals.join(' || ') }], // Prevents double invocation, see https://github.com/vega/vega/issues/1672.
                                update: `${dataSignals.join(' && ')} ? {${update}: [${dataSignals}]} : null`
                            }
                        ]
                    }
                    : {})
            });
        }
        else {
            const projection = extension_$(model.projectionName());
            const centerSg = model.projectionName() + extension_interval_CENTER;
            const { x, y } = selCmpt.project.hasChannel;
            const xvname = x && x.signals.visual;
            const yvname = y && y.signals.visual;
            const xinit = x ? init && init[x.index] : `${centerSg}[0]`;
            const yinit = y ? init && init[y.index] : `${centerSg}[1]`;
            const sizeSg = (layout) => model.getSizeSignalRef(layout).signal;
            const bbox = `[` +
                `[${xvname ? xvname + '[0]' : '0'}, ${yvname ? yvname + '[0]' : '0'}],` +
                `[${xvname ? xvname + '[1]' : sizeSg('width')}, ` +
                `${yvname ? yvname + '[1]' : sizeSg('height')}]` +
                `]`;
            if (init) {
                signals.unshift({
                    name: name + extension_INIT,
                    init: `[scale(${projection}, [${x ? xinit[0] : xinit}, ${y ? yinit[0] : yinit}]), ` +
                        `scale(${projection}, [${x ? xinit[1] : xinit}, ${y ? yinit[1] : yinit}])]`
                });
                if (!x || !y) {
                    // If initializing a uni-dimensional brush, use the center of the view to determine the other coord
                    const hasCenterSg = signals.find(s => s.name === centerSg);
                    if (!hasCenterSg) {
                        signals.unshift({
                            name: centerSg,
                            update: `invert(${projection}, [${sizeSg('width')}/2, ${sizeSg('height')}/2])`
                        });
                    }
                }
            }
            const intersect = `intersect(${bbox}, {markname: ${extension_$(model.getName('marks'))}}, unit.mark)`;
            const base = `{unit: ${extension_unitName(model)}}`;
            const update = `vlSelectionTuples(${intersect}, ${base})`;
            const visualSignals = channels.map(proj => proj.signals.visual);
            return signals.concat({
                name: tupleSg,
                on: [
                    {
                        events: [
                            ...(visualSignals.length ? [{ signal: visualSignals.join(' || ') }] : []),
                            ...(init ? [{ signal: extension_GEO_INIT_TICK }] : [])
                        ],
                        update
                    }
                ]
            });
        }
    },
    topLevelSignals: (model, selCmpt, signals) => {
        if (extension_isUnitModel(model) && model.hasProjection && selCmpt.init) {
            // Workaround for https://github.com/vega/vega/issues/3481
            // The scenegraph isn't populated on the first pulse. So we use a timer signal
            // to re-pulse the dataflow as soon as possible. We return an object to ensure
            // this only occurs once.
            const hasTick = signals.filter(s => s.name === extension_GEO_INIT_TICK);
            if (!hasTick.length) {
                signals.unshift({
                    name: extension_GEO_INIT_TICK,
                    value: null,
                    on: [
                        {
                            events: 'timer{1}',
                            update: `${extension_GEO_INIT_TICK} === null ? {} : ${extension_GEO_INIT_TICK}`
                        }
                    ]
                });
            }
        }
        return signals;
    },
    marks: (model, selCmpt, marks) => {
        const name = selCmpt.name;
        const { x, y } = selCmpt.project.hasChannel;
        const xvname = x?.signals.visual;
        const yvname = y?.signals.visual;
        const store = `data(${extension_$(selCmpt.name + extension_STORE)})`;
        // Do not add a brush if we're binding to scales
        // or we don't have a valid interval projection
        if (extension_selection_scales.defined(selCmpt) || (!x && !y)) {
            return marks;
        }
        const update = {
            x: x !== undefined ? { signal: `${xvname}[0]` } : { value: 0 },
            y: y !== undefined ? { signal: `${yvname}[0]` } : { value: 0 },
            x2: x !== undefined ? { signal: `${xvname}[1]` } : { field: { group: 'width' } },
            y2: y !== undefined ? { signal: `${yvname}[1]` } : { field: { group: 'height' } }
        };
        // If the selection is resolved to global, only a single interval is in
        // the store. Wrap brush mark's encodings with a production rule to test
        // this based on the `unit` property. Hide the brush mark if it corresponds
        // to a unit different from the one in the store.
        if (selCmpt.resolve === 'global') {
            for (const key of extension_util_keys(update)) {
                update[key] = [
                    {
                        test: `${store}.length && ${store}[0].unit === ${extension_unitName(model)}`,
                        ...update[key]
                    },
                    { value: 0 }
                ];
            }
        }
        // Two brush marks ensure that fill colors and other aesthetic choices do
        // not interefere with the core marks, but that the brushed region can still
        // be interacted with (e.g., dragging it around).
        const { fill, fillOpacity, cursor, ...stroke } = selCmpt.mark;
        const vgStroke = extension_util_keys(stroke).reduce((def, k) => {
            def[k] = [
                {
                    test: [
                        x !== undefined && `${xvname}[0] !== ${xvname}[1]`,
                        y !== undefined && `${yvname}[0] !== ${yvname}[1]`
                    ]
                        .filter(t => t)
                        .join(' && '),
                    value: stroke[k]
                },
                { value: null }
            ];
            return def;
        }, {});
        // Set cursor to move unless the brush cannot be translated
        const vgCursor = cursor ?? (selCmpt.translate ? 'move' : null);
        return [
            {
                name: `${name + extension_BRUSH}_bg`,
                type: 'rect',
                clip: true,
                encode: {
                    enter: {
                        fill: { value: fill },
                        fillOpacity: { value: fillOpacity }
                    },
                    update
                }
            },
            ...marks,
            {
                name: name + extension_BRUSH,
                type: 'rect',
                clip: true,
                encode: {
                    enter: {
                        ...(vgCursor ? { cursor: { value: vgCursor } } : {}),
                        fill: { value: 'transparent' }
                    },
                    update: { ...update, ...vgStroke }
                }
            }
        ];
    }
};
/* harmony default export */ const extension_selection_interval = (extension_interval_interval);
/**
 * Returns the visual and data signals for an interval selection.
 */
function extension_channelSignals(model, selCmpt, proj, init) {
    const scaledInterval = !model.hasProjection;
    const channel = proj.channel;
    const vname = proj.signals.visual;
    const scaleName = extension_$(scaledInterval ? model.scaleName(channel) : model.projectionName());
    const scaled = (str) => `scale(${scaleName}, ${str})`;
    const size = model.getSizeSignalRef(channel === extension_channel_X ? 'width' : 'height').signal;
    const coord = `${channel}(unit)`;
    const von = selCmpt.events.reduce((def, evt) => {
        return [
            ...def,
            { events: evt.between[0], update: `[${coord}, ${coord}]` }, // Brush Start
            { events: evt, update: `[${vname}[0], clamp(${coord}, 0, ${size})]` } // Brush End
        ];
    }, []);
    if (scaledInterval) {
        const dname = proj.signals.data;
        const hasScales = extension_selection_scales.defined(selCmpt);
        const scale = model.getScaleComponent(channel);
        const scaleType = scale ? scale.get('type') : undefined;
        const vinit = init ? { init: extension_assembleInit(init, true, scaled) } : { value: [] };
        // React to pan/zooms of continuous scales. Non-continuous scales
        // (band, point) cannot be pan/zoomed and any other changes
        // to their domains (e.g., filtering) should clear the brushes.
        von.push({
            events: { signal: selCmpt.name + extension_SCALE_TRIGGER },
            update: extension_hasContinuousDomain(scaleType) ? `[${scaled(`${dname}[0]`)}, ${scaled(`${dname}[1]`)}]` : `[0, 0]`
        });
        return hasScales
            ? [{ name: dname, on: [] }]
            : [
                { name: vname, ...vinit, on: von },
                {
                    name: dname,
                    ...(init ? { init: extension_assembleInit(init) } : {}), // Cannot be `value` as `init` may require datetime exprs.
                    on: [
                        {
                            events: { signal: vname },
                            update: `${vname}[0] === ${vname}[1] ? null : invert(${scaleName}, ${vname})`
                        }
                    ]
                }
            ];
    }
    else {
        const initIdx = channel === extension_channel_X ? 0 : 1;
        const initSg = selCmpt.name + extension_INIT;
        const vinit = init ? { init: `[${initSg}[0][${initIdx}], ${initSg}[1][${initIdx}]]` } : { value: [] };
        return [{ name: vname, ...vinit, on: von }];
    }
}
//# sourceMappingURL=interval.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/conditional.js




/**
 * Return a VgEncodeEntry that includes a Vega production rule for a scale channel's encoding or guide encoding, which includes:
 * (1) the conditional rules (if provided as part of channelDef)
 * (2) invalidValueRef for handling invalid values (if provided as a parameter of this method)
 * (3) main reference for the encoded data.
 */
function extension_wrapCondition({ model, channelDef, vgChannel, invalidValueRef, mainRefFn }) {
    const condition = extension_isConditionalDef(channelDef) && channelDef.condition;
    let valueRefs = [];
    if (condition) {
        const conditions = extension_vega_util_module_array(condition);
        valueRefs = conditions.map(c => {
            const conditionValueRef = mainRefFn(c);
            if (extension_isConditionalParameter(c)) {
                const { param, empty } = c;
                const test = extension_parseSelectionPredicate(model, { param, empty });
                return { test, ...conditionValueRef };
            }
            else {
                const test = extension_predicate_expression(model, c.test); // FIXME: remove casting once TS is no longer dumb about it
                return { test, ...conditionValueRef };
            }
        });
    }
    if (invalidValueRef !== undefined) {
        valueRefs.push(invalidValueRef);
    }
    const mainValueRef = mainRefFn(channelDef);
    if (mainValueRef !== undefined) {
        valueRefs.push(mainValueRef);
    }
    if (valueRefs.length > 1 ||
        (valueRefs.length === 1 && Boolean(valueRefs[0].test)) // We must use array form valueRefs if test exists, otherwise Vega won't execute the test.
    ) {
        return { [vgChannel]: valueRefs };
    }
    else if (valueRefs.length === 1) {
        return { [vgChannel]: valueRefs[0] };
    }
    return {};
}
//# sourceMappingURL=conditional.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/text.js




function extension_text_text(model, channel = 'text') {
    const channelDef = model.encoding[channel];
    return extension_wrapCondition({
        model,
        channelDef,
        vgChannel: channel,
        mainRefFn: cDef => extension_textRef(cDef, model.config),
        invalidValueRef: undefined // text encoding doesn't have continuous scales and thus can't have invalid values
    });
}
function extension_textRef(channelDef, config, expr = 'datum') {
    // text
    if (channelDef) {
        if (extension_isValueDef(channelDef)) {
            return extension_signalOrValueRef(channelDef.value);
        }
        if (extension_isFieldOrDatumDef(channelDef)) {
            const { format, formatType } = extension_getFormatMixins(channelDef);
            return extension_formatSignalRef({ fieldOrDatumDef: channelDef, format, formatType, expr, config });
        }
    }
    return undefined;
}
//# sourceMappingURL=text.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/tooltip.js











function extension_tooltip_tooltip(model, opt = {}) {
    const { encoding, markDef, config, stack } = model;
    const channelDef = encoding.tooltip;
    if (extension_vega_util_module_isArray(channelDef)) {
        return { tooltip: extension_tooltipRefForEncoding({ tooltip: channelDef }, stack, config, opt) };
    }
    else {
        const datum = opt.reactiveGeom ? 'datum.datum' : 'datum';
        const mainRefFn = (cDef) => {
            // use valueRef based on channelDef first
            const tooltipRefFromChannelDef = extension_textRef(cDef, config, datum);
            if (tooltipRefFromChannelDef) {
                return tooltipRefFromChannelDef;
            }
            if (cDef === null) {
                // Allow using encoding.tooltip = null to disable tooltip
                return undefined;
            }
            let markTooltip = extension_getMarkPropOrConfig('tooltip', markDef, config);
            if (markTooltip === true) {
                markTooltip = { content: 'encoding' };
            }
            if (extension_vega_util_module_isString(markTooltip)) {
                return { value: markTooltip };
            }
            else if (extension_vega_util_module_isObject(markTooltip)) {
                // `tooltip` is `{fields: 'encodings' | 'fields'}`
                if (extension_isSignalRef(markTooltip)) {
                    return markTooltip;
                }
                else if (markTooltip.content === 'encoding') {
                    return extension_tooltipRefForEncoding(encoding, stack, config, opt);
                }
                else {
                    return { signal: datum };
                }
            }
            return undefined;
        };
        return extension_wrapCondition({
            model,
            channelDef,
            vgChannel: 'tooltip',
            mainRefFn,
            invalidValueRef: undefined // tooltip encoding doesn't have continuous scales and thus can't have invalid values
        });
    }
}
function extension_tooltipData(encoding, stack, config, { reactiveGeom } = {}) {
    const formatConfig = { ...config, ...config.tooltipFormat };
    const toSkip = new Set();
    const expr = reactiveGeom ? 'datum.datum' : 'datum';
    const tuples = [];
    function add(fDef, channel) {
        const mainChannel = extension_getMainRangeChannel(channel);
        const fieldDef = extension_isTypedFieldDef(fDef)
            ? fDef
            : {
                ...fDef,
                type: encoding[mainChannel].type // for secondary field def, copy type from main channel
            };
        const title = fieldDef.title || extension_defaultTitle(fieldDef, formatConfig);
        const key = extension_vega_util_module_array(title).join(', ').replaceAll(/"/g, '\\"');
        let value;
        if (extension_isXorY(channel)) {
            const channel2 = channel === 'x' ? 'x2' : 'y2';
            const fieldDef2 = extension_getFieldDef(encoding[channel2]);
            if (extension_isBinned(fieldDef.bin) && fieldDef2) {
                const startField = extension_vgField(fieldDef, { expr });
                const endField = extension_vgField(fieldDef2, { expr });
                const { format, formatType } = extension_getFormatMixins(fieldDef);
                value = extension_binFormatExpression(startField, endField, format, formatType, formatConfig);
                toSkip.add(channel2);
            }
        }
        if ((extension_isXorY(channel) || channel === extension_THETA || channel === extension_RADIUS) &&
            stack &&
            stack.fieldChannel === channel &&
            stack.offset === 'normalize') {
            const { format, formatType } = extension_getFormatMixins(fieldDef);
            value = extension_formatSignalRef({
                fieldOrDatumDef: fieldDef,
                format,
                formatType,
                expr,
                config: formatConfig,
                normalizeStack: true
            }).signal;
        }
        value ?? (value = extension_textRef(fieldDef, formatConfig, expr).signal);
        tuples.push({ channel, key, value });
    }
    extension_forEach(encoding, (channelDef, channel) => {
        if (extension_isFieldDef(channelDef)) {
            add(channelDef, channel);
        }
        else if (extension_hasConditionalFieldDef(channelDef)) {
            add(channelDef.condition, channel);
        }
    });
    const out = {};
    for (const { channel, key, value } of tuples) {
        if (!toSkip.has(channel) && !out[key]) {
            out[key] = value;
        }
    }
    return out;
}
function extension_tooltipRefForEncoding(encoding, stack, config, { reactiveGeom } = {}) {
    const data = extension_tooltipData(encoding, stack, config, { reactiveGeom });
    const keyValues = extension_util_entries(data).map(([key, value]) => `"${key}": ${value}`);
    return keyValues.length > 0 ? { signal: `{${keyValues.join(', ')}}` } : undefined;
}
//# sourceMappingURL=tooltip.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/aria.js







function extension_aria(model) {
    const { markDef, config } = model;
    const enableAria = extension_getMarkPropOrConfig('aria', markDef, config);
    // We can ignore other aria properties if ariaHidden is true.
    if (enableAria === false) {
        // getMarkGroups sets aria to false already so we don't have to set it in the encode block
        return {};
    }
    return {
        ...(enableAria ? { aria: enableAria } : {}),
        ...extension_ariaRoleDescription(model),
        ...extension_description(model)
    };
}
function extension_ariaRoleDescription(model) {
    const { mark, markDef, config } = model;
    if (config.aria === false) {
        return {};
    }
    const ariaRoleDesc = extension_getMarkPropOrConfig('ariaRoleDescription', markDef, config);
    if (ariaRoleDesc != null) {
        return { ariaRoleDescription: { value: ariaRoleDesc } };
    }
    return extension_vega_util_module_has(extension_VG_MARK_INDEX, mark) ? {} : { ariaRoleDescription: { value: mark } };
}
function extension_description(model) {
    const { encoding, markDef, config, stack } = model;
    const channelDef = encoding.description;
    if (channelDef) {
        return extension_wrapCondition({
            model,
            channelDef,
            vgChannel: 'description',
            mainRefFn: cDef => extension_textRef(cDef, model.config),
            invalidValueRef: undefined // aria encoding doesn't have continuous scales and thus can't have invalid values
        });
    }
    // Use default from mark def or config if defined.
    // Functions in encode usually just return undefined but since we are defining a default below, we need to check the default here.
    const descriptionValue = extension_getMarkPropOrConfig('description', markDef, config);
    if (descriptionValue != null) {
        return {
            description: extension_signalOrValueRef(descriptionValue)
        };
    }
    if (config.aria === false) {
        return {};
    }
    const data = extension_tooltipData(encoding, stack, config);
    if (extension_isEmpty(data)) {
        return undefined;
    }
    return {
        description: {
            signal: extension_util_entries(data)
                .map(([key, value], index) => `"${index > 0 ? '; ' : ''}${key}: " + (${value})`)
                .join(' + ')
        }
    };
}
//# sourceMappingURL=aria.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/nonposition.js





/**
 * Return encode for non-positional channels with scales. (Text doesn't have scale.)
 */
function extension_nonPosition(channel, model, opt = {}) {
    const { markDef, encoding, config } = model;
    const { vgChannel } = opt;
    let { defaultRef, defaultValue } = opt;
    const channelDef = encoding[channel];
    if (defaultRef === undefined) {
        // prettier-ignore
        defaultValue ?? (defaultValue = extension_getMarkPropOrConfig(channel, markDef, config, {
            vgChannel,
            // If there is no conditonal def, we ignore vgConfig so the output spec is concise.
            // However, if there is a conditional def, we must include vgConfig so the default is respected.
            ignoreVgConfig: !extension_isConditionalDef(channelDef)
        }));
        if (defaultValue !== undefined) {
            defaultRef = extension_signalOrValueRef(defaultValue);
        }
    }
    const commonProps = {
        markDef,
        config,
        scaleName: model.scaleName(channel),
        scale: model.getScaleComponent(channel)
    };
    const invalidValueRef = extension_getConditionalValueRefForIncludingInvalidValue({
        ...commonProps,
        scaleChannel: channel,
        channelDef
    });
    const mainRefFn = (cDef) => {
        return extension_midPoint({
            ...commonProps,
            channel,
            channelDef: cDef,
            stack: null, // No need to provide stack for non-position as it does not affect mid point
            defaultRef
        });
    };
    return extension_wrapCondition({
        model,
        channelDef,
        vgChannel: vgChannel ?? channel,
        invalidValueRef,
        mainRefFn
    });
}
//# sourceMappingURL=nonposition.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/color.js




function extension_color_color(model, opt = { filled: undefined }) {
    const { markDef, encoding, config } = model;
    const { type: markType } = markDef;
    // Allow filled to be overridden (for trail's "filled")
    const filled = opt.filled ?? extension_getMarkPropOrConfig('filled', markDef, config);
    const transparentIfNeeded = extension_util_contains(['bar', 'point', 'circle', 'square', 'geoshape'], markType)
        ? 'transparent'
        : undefined;
    const defaultFill = extension_getMarkPropOrConfig(filled === true ? 'color' : undefined, markDef, config, { vgChannel: 'fill' }) ??
        // need to add this manually as getMarkConfig normally drops config.mark[channel] if vgChannel is specified
        config.mark[filled === true && 'color'] ??
        // If there is no fill, always fill symbols, bar, geoshape
        // with transparent fills https://github.com/vega/vega-lite/issues/1316
        transparentIfNeeded;
    const defaultStroke = extension_getMarkPropOrConfig(filled === false ? 'color' : undefined, markDef, config, { vgChannel: 'stroke' }) ??
        // need to add this manually as getMarkConfig normally drops config.mark[channel] if vgChannel is specified
        config.mark[filled === false && 'color'];
    const colorVgChannel = filled ? 'fill' : 'stroke';
    const fillStrokeMarkDefAndConfig = {
        ...(defaultFill ? { fill: extension_signalOrValueRef(defaultFill) } : {}),
        ...(defaultStroke ? { stroke: extension_signalOrValueRef(defaultStroke) } : {})
    };
    if (markDef.color && (filled ? markDef.fill : markDef.stroke)) {
        extension_log_warn(extension_droppingColor('property', { fill: 'fill' in markDef, stroke: 'stroke' in markDef }));
    }
    return {
        ...fillStrokeMarkDefAndConfig,
        ...extension_nonPosition('color', model, {
            vgChannel: colorVgChannel,
            defaultValue: filled ? defaultFill : defaultStroke
        }),
        ...extension_nonPosition('fill', model, {
            // if there is encoding.fill, include default fill just in case we have conditional-only fill encoding
            defaultValue: encoding.fill ? defaultFill : undefined
        }),
        ...extension_nonPosition('stroke', model, {
            // if there is encoding.stroke, include default fill just in case we have conditional-only stroke encoding
            defaultValue: encoding.stroke ? defaultStroke : undefined
        })
    };
}
//# sourceMappingURL=color.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/zindex.js




function extension_zindex(model) {
    const { encoding, mark } = model;
    const order = encoding.order;
    if (!extension_isPathMark(mark) && extension_isValueDef(order)) {
        return extension_wrapCondition({
            model,
            channelDef: order,
            vgChannel: 'zindex',
            mainRefFn: cd => extension_signalOrValueRef(cd.value),
            invalidValueRef: undefined // zindex encoding doesn't have continuous scales and thus can't have invalid values
        });
    }
    return {};
}
//# sourceMappingURL=zindex.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/offset.js


function extension_positionOffset({ channel: baseChannel, markDef, encoding = {}, model, bandPosition }) {
    const channel = `${baseChannel}Offset`; // Need to cast as the type can't be inferred automatically
    const defaultValue = markDef[channel];
    // FIXME: remove as any
    const channelDef = encoding[channel];
    if ((channel === 'xOffset' || channel === 'yOffset') && channelDef) {
        const ref = extension_midPoint({
            channel: channel,
            channelDef,
            markDef,
            config: model?.config,
            scaleName: model.scaleName(channel),
            scale: model.getScaleComponent(channel),
            stack: null,
            defaultRef: extension_signalOrValueRef(defaultValue),
            bandPosition
        });
        return { offsetType: 'encoding', offset: ref };
    }
    const markDefOffsetValue = markDef[channel];
    if (markDefOffsetValue) {
        return { offsetType: 'visual', offset: markDefOffsetValue };
    }
    return {};
}
//# sourceMappingURL=offset.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/position-point.js






/**
 * Return encode for point (non-band) position channels.
 */
function extension_pointPosition(channel, model, { defaultPos, vgChannel }) {
    const { encoding, markDef, config, stack } = model;
    const channelDef = encoding[channel];
    const channel2Def = encoding[extension_getSecondaryRangeChannel(channel)];
    const scaleName = model.scaleName(channel);
    const scale = model.getScaleComponent(channel);
    const { offset, offsetType } = extension_positionOffset({
        channel,
        markDef,
        encoding,
        model,
        bandPosition: 0.5
    });
    // Get default position or position from mark def
    const defaultRef = extension_pointPositionDefaultRef({
        model,
        defaultPos,
        channel,
        scaleName,
        scale
    });
    const valueRef = !channelDef && extension_isXorY(channel) && (encoding.latitude || encoding.longitude)
        ? // use geopoint output if there are lat/long and there is no point position overriding lat/long.
            { field: model.getName(channel) }
        : extension_positionRef({
            channel,
            channelDef,
            channel2Def,
            markDef,
            config,
            scaleName,
            scale,
            stack,
            offset,
            defaultRef,
            bandPosition: offsetType === 'encoding' ? 0 : undefined
        });
    return valueRef ? { [vgChannel || channel]: valueRef } : undefined;
}
// TODO: we need to find a way to refactor these so that scaleName is a part of scale
// but that's complicated. For now, this is a huge step moving forward.
/**
 * @return Vega ValueRef for normal x- or y-position without projection
 */
function extension_positionRef(params) {
    const { channel, channelDef, scaleName, stack, offset, markDef } = params;
    // This isn't a part of midPoint because we use midPoint for non-position too
    if (extension_isFieldOrDatumDef(channelDef) && stack && channel === stack.fieldChannel) {
        if (extension_isFieldDef(channelDef)) {
            let bandPosition = channelDef.bandPosition;
            if (bandPosition === undefined && markDef.type === 'text' && (channel === 'radius' || channel === 'theta')) {
                // theta and radius of text mark should use bandPosition = 0.5 by default
                // so that labels for arc marks are centered automatically
                bandPosition = 0.5;
            }
            if (bandPosition !== undefined) {
                return extension_interpolatedSignalRef({
                    scaleName,
                    fieldOrDatumDef: channelDef, // positionRef always have type
                    startSuffix: 'start',
                    bandPosition,
                    offset
                });
            }
        }
        // x or y use stack_end so that stacked line's point mark use stack_end too.
        return extension_valueRefForFieldOrDatumDef(channelDef, scaleName, { suffix: 'end' }, { offset });
    }
    return extension_midPointRefWithPositionInvalidTest(params);
}
function extension_pointPositionDefaultRef({ model, defaultPos, channel, scaleName, scale }) {
    const { markDef, config } = model;
    return () => {
        const mainChannel = extension_getMainRangeChannel(channel);
        const vgChannel = extension_getVgPositionChannel(channel);
        const definedValueOrConfig = extension_getMarkPropOrConfig(channel, markDef, config, { vgChannel });
        if (definedValueOrConfig !== undefined) {
            return extension_widthHeightValueOrSignalRef(channel, definedValueOrConfig);
        }
        switch (defaultPos) {
            case 'zeroOrMin':
                return extension_zeroOrMinOrMaxPosition({ scaleName, scale, mode: 'zeroOrMin', mainChannel, config });
            case 'zeroOrMax':
                return extension_zeroOrMinOrMaxPosition({
                    scaleName,
                    scale,
                    mode: { zeroOrMax: { widthSignal: model.width.signal, heightSignal: model.height.signal } },
                    mainChannel,
                    config
                });
            case 'mid': {
                const sizeRef = model[extension_getSizeChannel(channel)];
                return { ...sizeRef, mult: 0.5 };
            }
        }
        // defaultPos === null
        return undefined;
    };
}
function extension_zeroOrMinOrMaxPosition({ mainChannel, config, ...otherProps }) {
    const scaledValueRef = extension_scaledZeroOrMinOrMax(otherProps);
    const { mode } = otherProps;
    if (scaledValueRef) {
        return scaledValueRef;
    }
    switch (mainChannel) {
        case 'radius': {
            if (mode === 'zeroOrMin') {
                return { value: 0 }; // min value
            }
            const { widthSignal, heightSignal } = mode.zeroOrMax;
            // max of radius is min(width, height) / 2
            return {
                signal: `min(${widthSignal},${heightSignal})/2`
            };
        }
        case 'theta':
            return mode === 'zeroOrMin' ? { value: 0 } : { signal: '2*PI' };
        case 'x':
            return mode === 'zeroOrMin' ? { value: 0 } : { field: { group: 'width' } };
        case 'y':
            return mode === 'zeroOrMin' ? { field: { group: 'height' } } : { value: 0 };
    }
}
//# sourceMappingURL=position-point.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/position-align.js




const extension_ALIGNED_X_CHANNEL = {
    left: 'x',
    center: 'xc',
    right: 'x2'
};
const extension_BASELINED_Y_CHANNEL = {
    top: 'y',
    middle: 'yc',
    bottom: 'y2'
};
function extension_vgAlignedPositionChannel(channel, markDef, config, defaultAlign = 'middle') {
    if (channel === 'radius' || channel === 'theta') {
        return extension_getVgPositionChannel(channel);
    }
    const alignChannel = channel === 'x' ? 'align' : 'baseline';
    const align = extension_getMarkPropOrConfig(alignChannel, markDef, config);
    let alignExcludingSignal;
    if (extension_isSignalRef(align)) {
        extension_log_warn(extension_rangeMarkAlignmentCannotBeExpression(alignChannel));
        alignExcludingSignal = undefined;
    }
    else {
        alignExcludingSignal = align;
    }
    // FIXME: remove as any
    if (channel === 'x') {
        return extension_ALIGNED_X_CHANNEL[alignExcludingSignal || (defaultAlign === 'top' ? 'left' : 'center')];
    }
    else {
        return extension_BASELINED_Y_CHANNEL[alignExcludingSignal || defaultAlign];
    }
}
//# sourceMappingURL=position-align.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/position-range.js









/**
 * Utility for area/rule position, which can be either point or range.
 * (One of the axes should be point and the other should be range.)
 */
function extension_pointOrRangePosition(channel, model, { defaultPos, defaultPos2, range }) {
    if (range) {
        return extension_rangePosition(channel, model, { defaultPos, defaultPos2 });
    }
    return extension_pointPosition(channel, model, { defaultPos });
}
function extension_rangePosition(channel, model, { defaultPos, defaultPos2 }) {
    const { markDef, config } = model;
    const channel2 = extension_getSecondaryRangeChannel(channel);
    const sizeChannel = extension_getSizeChannel(channel);
    const pos2Mixins = extension_pointPosition2OrSize(model, defaultPos2, channel2);
    const vgChannel = pos2Mixins[sizeChannel]
        ? // If there is width/height, we need to position the marks based on the alignment.
            extension_vgAlignedPositionChannel(channel, markDef, config)
        : // Otherwise, make sure to apply to the right Vg Channel (for arc mark)
            extension_getVgPositionChannel(channel);
    return {
        ...extension_pointPosition(channel, model, { defaultPos, vgChannel }),
        ...pos2Mixins
    };
}
/**
 * Return encode for x2, y2.
 * If channel is not specified, return one channel based on orientation.
 */
function extension_pointPosition2OrSize(model, defaultPos, channel) {
    const { encoding, mark, markDef, stack, config } = model;
    const baseChannel = extension_getMainRangeChannel(channel);
    const sizeChannel = extension_getSizeChannel(channel);
    const vgChannel = extension_getVgPositionChannel(channel);
    const channelDef = encoding[baseChannel];
    const scaleName = model.scaleName(baseChannel);
    const scale = model.getScaleComponent(baseChannel);
    const { offset } = channel in encoding || channel in markDef
        ? extension_positionOffset({ channel, markDef, encoding, model })
        : extension_positionOffset({ channel: baseChannel, markDef, encoding, model });
    if (!channelDef && (channel === 'x2' || channel === 'y2') && (encoding.latitude || encoding.longitude)) {
        const vgSizeChannel = extension_getSizeChannel(channel);
        const size = model.markDef[vgSizeChannel];
        if (size != null) {
            return {
                [vgSizeChannel]: { value: size }
            };
        }
        else {
            return {
                [vgChannel]: { field: model.getName(channel) }
            };
        }
    }
    const valueRef = extension_position2Ref({
        channel,
        channelDef,
        channel2Def: encoding[channel],
        markDef,
        config,
        scaleName,
        scale,
        stack,
        offset,
        defaultRef: undefined
    });
    if (valueRef !== undefined) {
        return { [vgChannel]: valueRef };
    }
    // TODO: check width/height encoding here once we add them
    // no x2/y2 encoding, then try to read x2/y2 or width/height based on precedence:
    // markDef > config.style > mark-specific config (config[mark]) > general mark config (config.mark)
    return (extension_position2orSize(channel, markDef) ||
        extension_position2orSize(channel, {
            [channel]: extension_getMarkStyleConfig(channel, markDef, config.style),
            [sizeChannel]: extension_getMarkStyleConfig(sizeChannel, markDef, config.style)
        }) ||
        extension_position2orSize(channel, config[mark]) ||
        extension_position2orSize(channel, config.mark) || {
        [vgChannel]: extension_pointPositionDefaultRef({
            model,
            defaultPos,
            channel,
            scaleName,
            scale
        })()
    });
}
function extension_position2Ref({ channel, channelDef, channel2Def, markDef, config, scaleName, scale, stack, offset, defaultRef }) {
    if (extension_isFieldOrDatumDef(channelDef) &&
        stack &&
        // If fieldChannel is X and channel is X2 (or Y and Y2)
        channel.charAt(0) === stack.fieldChannel.charAt(0)) {
        return extension_valueRefForFieldOrDatumDef(channelDef, scaleName, { suffix: 'start' }, { offset });
    }
    return extension_midPointRefWithPositionInvalidTest({
        channel,
        channelDef: channel2Def,
        scaleName,
        scale,
        stack,
        markDef,
        config,
        offset,
        defaultRef
    });
}
function extension_position2orSize(channel, markDef) {
    const sizeChannel = extension_getSizeChannel(channel);
    const vgChannel = extension_getVgPositionChannel(channel);
    if (markDef[vgChannel] !== undefined) {
        return { [vgChannel]: extension_widthHeightValueOrSignalRef(channel, markDef[vgChannel]) };
    }
    else if (markDef[channel] !== undefined) {
        return { [vgChannel]: extension_widthHeightValueOrSignalRef(channel, markDef[channel]) };
    }
    else if (markDef[sizeChannel]) {
        const dimensionSize = markDef[sizeChannel];
        if (extension_isRelativeBandSize(dimensionSize)) {
            extension_log_warn(extension_relativeBandSizeNotSupported(sizeChannel));
        }
        else {
            return { [sizeChannel]: extension_widthHeightValueOrSignalRef(channel, dimensionSize) };
        }
    }
    return undefined;
}
//# sourceMappingURL=position-range.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/position-rect.js



















function extension_rectPosition(model, channel) {
    const { config, encoding, markDef } = model;
    const mark = markDef.type;
    const channel2 = extension_getSecondaryRangeChannel(channel);
    const sizeChannel = extension_getSizeChannel(channel);
    const channelDef = encoding[channel];
    const channelDef2 = encoding[channel2];
    const scale = model.getScaleComponent(channel);
    const scaleType = scale ? scale.get('type') : undefined;
    const orient = markDef.orient;
    const hasSizeDef = encoding[sizeChannel] ??
        encoding.size ??
        extension_getMarkPropOrConfig('size', markDef, config, { vgChannel: sizeChannel });
    const offsetScaleChannel = extension_getOffsetChannel(channel);
    const isBarOrTickBand = (mark === 'bar' && (channel === 'x' ? orient === 'vertical' : orient === 'horizontal')) ||
        (mark === 'tick' && (channel === 'y' ? orient === 'vertical' : orient === 'horizontal'));
    // x, x2, and width -- we must specify two of these in all conditions
    if (extension_isFieldDef(channelDef) &&
        (extension_isBinning(channelDef.bin) || extension_isBinned(channelDef.bin) || (channelDef.timeUnit && !channelDef2)) &&
        !(hasSizeDef && !extension_isRelativeBandSize(hasSizeDef)) &&
        !encoding[offsetScaleChannel] &&
        !extension_hasDiscreteDomain(scaleType)) {
        return extension_rectBinPosition({
            fieldDef: channelDef,
            fieldDef2: channelDef2,
            channel,
            model
        });
    }
    else if (((extension_isFieldOrDatumDef(channelDef) && extension_hasDiscreteDomain(scaleType)) || isBarOrTickBand) && !channelDef2) {
        return extension_positionAndSize(channelDef, channel, model);
    }
    else {
        return extension_rangePosition(channel, model, { defaultPos: 'zeroOrMax', defaultPos2: 'zeroOrMin' });
    }
}
function extension_defaultSizeRef(sizeChannel, scaleName, scale, config, bandSize, hasFieldDef, mark) {
    if (extension_isRelativeBandSize(bandSize)) {
        if (scale) {
            const scaleType = scale.get('type');
            if (scaleType === 'band') {
                let bandWidth = `bandwidth('${scaleName}')`;
                if (bandSize.band !== 1) {
                    bandWidth = `${bandSize.band} * ${bandWidth}`;
                }
                const minBandSize = extension_getMarkConfig('minBandSize', { type: mark }, config);
                return { signal: minBandSize ? `max(${extension_signalOrStringValue(minBandSize)}, ${bandWidth})` : bandWidth };
            }
            else if (bandSize.band !== 1) {
                extension_log_warn(extension_cannotUseRelativeBandSizeWithNonBandScale(scaleType));
                bandSize = undefined;
            }
        }
        else {
            return {
                mult: bandSize.band,
                field: { group: sizeChannel }
            };
        }
    }
    else if (extension_isSignalRef(bandSize)) {
        return bandSize;
    }
    else if (bandSize) {
        return { value: bandSize };
    }
    // no valid band size
    if (scale) {
        const scaleRange = scale.get('range');
        if (extension_isVgRangeStep(scaleRange) && extension_vega_util_module_isNumber(scaleRange.step)) {
            return { value: scaleRange.step - 2 };
        }
    }
    if (!hasFieldDef) {
        const { bandPaddingInner, barBandPaddingInner, rectBandPaddingInner, tickBandPaddingInner } = config.scale;
        const padding = extension_getFirstDefined(bandPaddingInner, mark === 'tick' ? tickBandPaddingInner : mark === 'bar' ? barBandPaddingInner : rectBandPaddingInner); // this part is like paddingInner in scale.ts
        if (extension_isSignalRef(padding)) {
            return { signal: `(1 - (${padding.signal})) * ${sizeChannel}` };
        }
        else if (extension_vega_util_module_isNumber(padding)) {
            return { signal: `${1 - padding} * ${sizeChannel}` };
        }
    }
    const defaultStep = extension_getViewConfigDiscreteStep(config.view, sizeChannel);
    return { value: defaultStep - 2 };
}
/**
 * Output position encoding and its size encoding for continuous, point, and band scales.
 */
function extension_positionAndSize(fieldDef, channel, model) {
    const { markDef, encoding, config, stack } = model;
    const orient = markDef.orient;
    const scaleName = model.scaleName(channel);
    const scale = model.getScaleComponent(channel);
    const vgSizeChannel = extension_getSizeChannel(channel);
    const channel2 = extension_getSecondaryRangeChannel(channel);
    const offsetScaleChannel = extension_getOffsetChannel(channel);
    const offsetScaleName = model.scaleName(offsetScaleChannel);
    const offsetScale = model.getScaleComponent(extension_getOffsetScaleChannel(channel));
    const useVlSizeChannel = 
    // Always uses size channel for ticks, because tick only calls rectPosition() for the size channel
    markDef.type === 'tick' ||
        // use "size" channel for bars, if there is orient and the channel matches the right orientation
        (orient === 'horizontal' && channel === 'y') ||
        (orient === 'vertical' && channel === 'x');
    // Use size encoding / mark property / config if it exists
    let sizeMixins;
    if (encoding.size || markDef.size) {
        if (useVlSizeChannel) {
            sizeMixins = extension_nonPosition('size', model, {
                vgChannel: vgSizeChannel,
                defaultRef: extension_signalOrValueRef(markDef.size)
            });
        }
        else {
            extension_log_warn(extension_cannotApplySizeToNonOrientedMark(markDef.type));
        }
    }
    const hasSizeFromMarkOrEncoding = !!sizeMixins;
    // Otherwise, apply default value
    const bandSize = extension_getBandSize({
        channel,
        fieldDef,
        markDef,
        config,
        scaleType: (scale || offsetScale)?.get('type'),
        useVlSizeChannel
    });
    sizeMixins = sizeMixins || {
        [vgSizeChannel]: extension_defaultSizeRef(vgSizeChannel, offsetScaleName || scaleName, offsetScale || scale, config, bandSize, !!fieldDef, markDef.type)
    };
    /*
      Band scales with size value and all point scales, use xc/yc + band=0.5
  
      Otherwise (band scales that has size based on a band ref), use x/y with position band = (1 - size_band) / 2.
      In this case, size_band is the band specified in the x/y-encoding.
      By default band is 1, so `(1 - band) / 2` = 0.
      If band is 0.6, the the x/y position in such case should be `(1 - band) / 2` = 0.2
     */
    const defaultBandAlign = (scale || offsetScale)?.get('type') === 'band' && extension_isRelativeBandSize(bandSize) && !hasSizeFromMarkOrEncoding
        ? 'top'
        : 'middle';
    const vgChannel = extension_vgAlignedPositionChannel(channel, markDef, config, defaultBandAlign);
    const center = vgChannel === 'xc' || vgChannel === 'yc';
    const { offset, offsetType } = extension_positionOffset({ channel, markDef, encoding, model, bandPosition: center ? 0.5 : 0 });
    const posRef = extension_midPointRefWithPositionInvalidTest({
        channel,
        channelDef: fieldDef,
        markDef,
        config,
        scaleName,
        scale,
        stack,
        offset,
        defaultRef: extension_pointPositionDefaultRef({ model, defaultPos: 'mid', channel, scaleName, scale }),
        bandPosition: center
            ? offsetType === 'encoding'
                ? 0
                : 0.5
            : extension_isSignalRef(bandSize)
                ? { signal: `(1-${bandSize})/2` }
                : extension_isRelativeBandSize(bandSize)
                    ? (1 - bandSize.band) / 2
                    : 0
    });
    if (vgSizeChannel) {
        return { [vgChannel]: posRef, ...sizeMixins };
    }
    else {
        // otherwise, we must simulate size by setting position2 = position + size
        // (for theta/radius since Vega doesn't have thetaWidth/radiusWidth)
        const vgChannel2 = extension_getVgPositionChannel(channel2);
        const sizeRef = sizeMixins[vgSizeChannel];
        const sizeOffset = offset ? { ...sizeRef, offset } : sizeRef;
        return {
            [vgChannel]: posRef,
            // posRef might be an array that wraps position invalid test
            [vgChannel2]: extension_vega_util_module_isArray(posRef)
                ? [posRef[0], { ...posRef[1], offset: sizeOffset }]
                : {
                    ...posRef,
                    offset: sizeOffset
                }
        };
    }
}
function extension_getBinSpacing(channel, spacing, reverse, axisTranslate, offset, minBandSize, bandSizeExpr) {
    if (extension_isPolarPositionChannel(channel)) {
        return 0;
    }
    const isEnd = channel === 'x' || channel === 'y2';
    const spacingOffset = isEnd ? -spacing / 2 : spacing / 2;
    if (extension_isSignalRef(reverse) || extension_isSignalRef(offset) || extension_isSignalRef(axisTranslate) || minBandSize) {
        const reverseExpr = extension_signalOrStringValue(reverse);
        const offsetExpr = extension_signalOrStringValue(offset);
        const axisTranslateExpr = extension_signalOrStringValue(axisTranslate);
        const minBandSizeExpr = extension_signalOrStringValue(minBandSize);
        const sign = isEnd ? '' : '-';
        const spacingAndSizeOffset = minBandSize
            ? `(${bandSizeExpr} < ${minBandSizeExpr} ? ${sign}0.5 * (${minBandSizeExpr} - (${bandSizeExpr})) : ${spacingOffset})`
            : spacingOffset;
        const t = axisTranslateExpr ? `${axisTranslateExpr} + ` : '';
        const r = reverseExpr ? `(${reverseExpr} ? -1 : 1) * ` : '';
        const o = offsetExpr ? `(${offsetExpr} + ${spacingAndSizeOffset})` : spacingAndSizeOffset;
        return {
            signal: t + r + o
        };
    }
    else {
        offset = offset || 0;
        return axisTranslate + (reverse ? -offset - spacingOffset : +offset + spacingOffset);
    }
}
function extension_rectBinPosition({ fieldDef, fieldDef2, channel, model }) {
    const { config, markDef, encoding } = model;
    const scale = model.getScaleComponent(channel);
    const scaleName = model.scaleName(channel);
    const scaleType = scale ? scale.get('type') : undefined;
    const reverse = scale.get('reverse');
    const bandSize = extension_getBandSize({ channel, fieldDef, markDef, config, scaleType });
    const axis = model.component.axes[channel]?.[0];
    const axisTranslate = axis?.get('translate') ?? 0.5; // vega default is 0.5
    const spacing = extension_isXorY(channel) ? (extension_getMarkPropOrConfig('binSpacing', markDef, config) ?? 0) : 0;
    const channel2 = extension_getSecondaryRangeChannel(channel);
    const vgChannel = extension_getVgPositionChannel(channel);
    const vgChannel2 = extension_getVgPositionChannel(channel2);
    const minBandSize = extension_getMarkConfig('minBandSize', markDef, config);
    const { offset } = extension_positionOffset({ channel, markDef, encoding, model, bandPosition: 0 });
    const { offset: offset2 } = extension_positionOffset({ channel: channel2, markDef, encoding, model, bandPosition: 0 });
    const bandSizeExpr = extension_binSizeExpr({ fieldDef, scaleName });
    const binSpacingOffset = extension_getBinSpacing(channel, spacing, reverse, axisTranslate, offset, minBandSize, bandSizeExpr);
    const binSpacingOffset2 = extension_getBinSpacing(channel2, spacing, reverse, axisTranslate, offset2 ?? offset, minBandSize, bandSizeExpr);
    const bandPositionForBandSize = extension_isSignalRef(bandSize)
        ? { signal: `(1-${bandSize.signal})/2` }
        : extension_isRelativeBandSize(bandSize)
            ? (1 - bandSize.band) / 2
            : 0.5;
    const bandPosition = extension_getBandPosition({ fieldDef, fieldDef2, markDef, config });
    if (extension_isBinning(fieldDef.bin) || fieldDef.timeUnit) {
        const useRectOffsetField = fieldDef.timeUnit && bandPosition !== 0.5;
        return {
            [vgChannel2]: extension_rectBinRef({
                fieldDef,
                scaleName,
                bandPosition: bandPositionForBandSize,
                offset: binSpacingOffset2,
                useRectOffsetField
            }),
            [vgChannel]: extension_rectBinRef({
                fieldDef,
                scaleName,
                bandPosition: extension_isSignalRef(bandPositionForBandSize)
                    ? { signal: `1-${bandPositionForBandSize.signal}` }
                    : 1 - bandPositionForBandSize,
                offset: binSpacingOffset,
                useRectOffsetField
            })
        };
    }
    else if (extension_isBinned(fieldDef.bin)) {
        const startRef = extension_valueRefForFieldOrDatumDef(fieldDef, scaleName, {}, { offset: binSpacingOffset2 });
        if (extension_isFieldDef(fieldDef2)) {
            return {
                [vgChannel2]: startRef,
                [vgChannel]: extension_valueRefForFieldOrDatumDef(fieldDef2, scaleName, {}, { offset: binSpacingOffset })
            };
        }
        else if (extension_isBinParams(fieldDef.bin) && fieldDef.bin.step) {
            return {
                [vgChannel2]: startRef,
                [vgChannel]: {
                    signal: `scale("${scaleName}", ${extension_vgField(fieldDef, { expr: 'datum' })} + ${fieldDef.bin.step})`,
                    offset: binSpacingOffset
                }
            };
        }
    }
    extension_log_warn(extension_channelRequiredForBinned(channel2));
    return undefined;
}
/**
 * Value Ref for binned fields
 */
function extension_rectBinRef({ fieldDef, scaleName, bandPosition, offset, useRectOffsetField }) {
    return extension_interpolatedSignalRef({
        scaleName,
        fieldOrDatumDef: fieldDef,
        bandPosition,
        offset,
        ...(useRectOffsetField
            ? {
                startSuffix: extension_OFFSETTED_RECT_START_SUFFIX,
                endSuffix: extension_OFFSETTED_RECT_END_SUFFIX
            }
            : {})
    });
}
//# sourceMappingURL=position-rect.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/base.js
















const extension_ALWAYS_IGNORE = new Set(['aria', 'width', 'height']);
function extension_baseEncodeEntry(model, ignore) {
    const { fill = undefined, stroke = undefined } = ignore.color === 'include' ? extension_color_color(model) : {};
    return {
        ...extension_markDefProperties(model.markDef, ignore),
        ...extension_colorRef('fill', fill),
        ...extension_colorRef('stroke', stroke),
        ...extension_nonPosition('opacity', model),
        ...extension_nonPosition('fillOpacity', model),
        ...extension_nonPosition('strokeOpacity', model),
        ...extension_nonPosition('strokeWidth', model),
        ...extension_nonPosition('strokeDash', model),
        ...extension_zindex(model),
        ...extension_tooltip_tooltip(model),
        ...extension_text_text(model, 'href'),
        ...extension_aria(model)
    };
}
function extension_colorRef(channel, valueRef) {
    return valueRef ? { [channel]: valueRef } : {};
}
function extension_markDefProperties(mark, ignore) {
    return extension_VG_MARK_CONFIGS.reduce((m, prop) => {
        if (!extension_ALWAYS_IGNORE.has(prop) && extension_util_hasProperty(mark, prop) && ignore[prop] !== 'ignore') {
            m[prop] = extension_signalOrValueRef(mark[prop]);
        }
        return m;
    }, {});
}
//# sourceMappingURL=base.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/defined.js





/**
 * Create Vega's "defined" encoding to break paths in a path mark for invalid values.
 */
function extension_defined(model) {
    const { config, markDef } = model;
    // For each channel (x/y), add fields to break path to a set first.
    const fieldsToBreakPath = new Set();
    model.forEachFieldDef((fieldDef, channel) => {
        let scaleType;
        if (!extension_isScaleChannel(channel) || !(scaleType = model.getScaleType(channel))) {
            // Skip if the channel is not a scale channel or does not have a scale
            return;
        }
        const isCountAggregate = extension_isCountingAggregateOp(fieldDef.aggregate);
        const invalidDataMode = extension_getScaleInvalidDataMode({
            scaleChannel: channel,
            markDef,
            config,
            scaleType,
            isCountAggregate
        });
        if (extension_shouldBreakPath(invalidDataMode)) {
            const field = model.vgField(channel, { expr: 'datum', binSuffix: model.stack?.impute ? 'mid' : undefined });
            if (field) {
                fieldsToBreakPath.add(field);
            }
        }
    });
    // If the set is not empty, return a defined signal.
    if (fieldsToBreakPath.size > 0) {
        const signal = [...fieldsToBreakPath].map(field => extension_fieldValidPredicate(field, true)).join(' && ');
        return { defined: { signal } };
    }
    return undefined;
}
function extension_valueIfDefined(prop, value) {
    if (value !== undefined) {
        return { [prop]: extension_signalOrValueRef(value) };
    }
    return undefined;
}
//# sourceMappingURL=defined.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/encode/index.js










//# sourceMappingURL=index.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/nearest.js



const extension_VORONOI = 'voronoi';
const extension_nearest = {
    defined: selCmpt => {
        return selCmpt.type === 'point' && selCmpt.nearest;
    },
    parse: (model, selCmpt) => {
        // Scope selection events to the voronoi mark to prevent capturing
        // events that occur on the group mark (https://github.com/vega/vega/issues/2112).
        if (selCmpt.events) {
            for (const s of selCmpt.events) {
                s.markname = model.getName(extension_VORONOI);
            }
        }
    },
    marks: (model, selCmpt, marks) => {
        const { x, y } = selCmpt.project.hasChannel;
        const markType = model.mark;
        if (extension_isPathMark(markType)) {
            extension_log_warn(extension_nearestNotSupportForContinuous(markType));
            return marks;
        }
        const cellDef = {
            name: model.getName(extension_VORONOI),
            type: 'path',
            interactive: true,
            from: { data: model.getName('marks') },
            encode: {
                update: {
                    fill: { value: 'transparent' },
                    strokeWidth: { value: 0.35 },
                    stroke: { value: 'transparent' },
                    isVoronoi: { value: true },
                    ...extension_tooltip_tooltip(model, { reactiveGeom: true })
                }
            },
            transform: [
                {
                    type: 'voronoi',
                    x: { expr: x || !y ? 'datum.datum.x || 0' : '0' },
                    y: { expr: y || !x ? 'datum.datum.y || 0' : '0' },
                    size: [model.getSizeSignalRef('width'), model.getSizeSignalRef('height')]
                }
            ]
        };
        let index = 0;
        let exists = false;
        marks.forEach((mark, i) => {
            const name = mark.name ?? '';
            if (name === model.component.mark[0].name) {
                index = i;
            }
            else if (name.includes(extension_VORONOI)) {
                exists = true;
            }
        });
        if (!exists) {
            marks.splice(index + 1, 0, cellDef);
        }
        return marks;
    }
};
/* harmony default export */ const extension_selection_nearest = (extension_nearest);
//# sourceMappingURL=nearest.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/inputs.js







const extension_inputBindings = {
    defined: selCmpt => {
        return (selCmpt.type === 'point' &&
            selCmpt.resolve === 'global' &&
            selCmpt.bind &&
            selCmpt.bind !== 'scales' &&
            !extension_isLegendBinding(selCmpt.bind));
    },
    parse: (model, selCmpt, selDef) => extension_disableDirectManipulation(selCmpt, selDef),
    topLevelSignals: (model, selCmpt, signals) => {
        const name = selCmpt.name;
        const proj = selCmpt.project;
        const bind = selCmpt.bind;
        const init = selCmpt.init && selCmpt.init[0]; // Can only exist on single selections (one initial value).
        const datum = extension_selection_nearest.defined(selCmpt) ? '(item().isVoronoi ? datum.datum : datum)' : 'datum';
        proj.items.forEach((p, i) => {
            const sgname = extension_varName(`${name}_${p.field}`);
            const hasSignal = signals.filter(s => s.name === sgname);
            if (!hasSignal.length) {
                signals.unshift({
                    name: sgname,
                    ...(init ? { init: extension_assembleInit(init[i]) } : { value: null }),
                    on: selCmpt.events
                        ? [
                            {
                                events: selCmpt.events,
                                update: `datum && item().mark.marktype !== 'group' ? ${datum}[${extension_$(p.field)}] : null`
                            }
                        ]
                        : [],
                    bind: bind[p.field] ?? bind[p.channel] ?? bind
                });
            }
        });
        return signals;
    },
    signals: (model, selCmpt, signals) => {
        const name = selCmpt.name;
        const proj = selCmpt.project;
        const signal = signals.find(s => s.name === name + extension_TUPLE);
        const fields = name + extension_TUPLE_FIELDS;
        const values = proj.items.map(p => extension_varName(`${name}_${p.field}`));
        const valid = values.map(v => `${v} !== null`).join(' && ');
        if (values.length) {
            signal.update = `${valid} ? {fields: ${fields}, values: [${values.join(', ')}]} : null`;
        }
        delete signal.value;
        delete signal.on;
        return signals;
    }
};
/* harmony default export */ const extension_inputs = (extension_inputBindings);
//# sourceMappingURL=inputs.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/toggle.js

const extension_TOGGLE = '_toggle';
const extension_toggle = {
    defined: selCmpt => {
        return selCmpt.type === 'point' && !extension_isTimerSelection(selCmpt) && !!selCmpt.toggle;
    },
    signals: (model, selCmpt, signals) => {
        return signals.concat({
            name: selCmpt.name + extension_TOGGLE,
            value: false,
            on: [{ events: selCmpt.events, update: selCmpt.toggle }]
        });
    },
    modifyExpr: (model, selCmpt) => {
        const tpl = selCmpt.name + extension_TUPLE;
        const signal = selCmpt.name + extension_TOGGLE;
        return (`${signal} ? null : ${tpl}, ` +
            (selCmpt.resolve === 'global' ? `${signal} ? null : true, ` : `${signal} ? null : {unit: ${extension_unitName(model)}}, `) +
            `${signal} ? ${tpl} : null`);
    }
};
/* harmony default export */ const extension_selection_toggle = (extension_toggle);
//# sourceMappingURL=toggle.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/clear.js






const extension_clear = {
    defined: selCmpt => {
        return selCmpt.clear !== undefined && selCmpt.clear !== false && !extension_isTimerSelection(selCmpt);
    },
    parse: (model, selCmpt) => {
        if (selCmpt.clear) {
            selCmpt.clear = extension_vega_util_module_isString(selCmpt.clear) ? extension_eventSelector(selCmpt.clear, 'view') : selCmpt.clear;
        }
    },
    topLevelSignals: (model, selCmpt, signals) => {
        if (extension_inputs.defined(selCmpt)) {
            for (const proj of selCmpt.project.items) {
                const idx = signals.findIndex(n => n.name === extension_varName(`${selCmpt.name}_${proj.field}`));
                if (idx !== -1) {
                    signals[idx].on.push({ events: selCmpt.clear, update: 'null' });
                }
            }
        }
        return signals;
    },
    signals: (model, selCmpt, signals) => {
        function addClear(idx, update) {
            if (idx !== -1 && signals[idx].on) {
                signals[idx].on.push({ events: selCmpt.clear, update });
            }
        }
        // Be as minimalist as possible when adding clear triggers to minimize dataflow execution.
        if (selCmpt.type === 'interval') {
            for (const proj of selCmpt.project.items) {
                const vIdx = signals.findIndex(n => n.name === proj.signals.visual);
                addClear(vIdx, '[0, 0]');
                if (vIdx === -1) {
                    const dIdx = signals.findIndex(n => n.name === proj.signals.data);
                    addClear(dIdx, 'null');
                }
            }
        }
        else {
            let tIdx = signals.findIndex(n => n.name === selCmpt.name + extension_TUPLE);
            addClear(tIdx, 'null');
            if (extension_selection_toggle.defined(selCmpt)) {
                tIdx = signals.findIndex(n => n.name === selCmpt.name + extension_TOGGLE);
                addClear(tIdx, 'false');
            }
        }
        return signals;
    }
};
/* harmony default export */ const extension_selection_clear = (extension_clear);
//# sourceMappingURL=clear.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/legends.js









const extension_legendBindings = {
    defined: selCmpt => {
        const spec = selCmpt.resolve === 'global' && selCmpt.bind && extension_isLegendBinding(selCmpt.bind);
        const projLen = selCmpt.project.items.length === 1 && selCmpt.project.items[0].field !== extension_SELECTION_ID;
        if (spec && !projLen) {
            extension_log_warn(extension_LEGEND_BINDINGS_MUST_HAVE_PROJECTION);
        }
        return spec && projLen;
    },
    parse: (model, selCmpt, selDef) => {
        // Allow legend items to be toggleable by default even though direct manipulation is disabled.
        const selDef_ = extension_duplicate(selDef);
        selDef_.select = extension_vega_util_module_isString(selDef_.select)
            ? { type: selDef_.select, toggle: selCmpt.toggle }
            : { ...selDef_.select, toggle: selCmpt.toggle };
        extension_disableDirectManipulation(selCmpt, selDef_);
        if (extension_vega_util_module_isObject(selDef.select) && (selDef.select.on || selDef.select.clear)) {
            const legendFilter = 'event.item && indexof(event.item.mark.role, "legend") < 0';
            for (const evt of selCmpt.events) {
                evt.filter = extension_vega_util_module_array(evt.filter ?? []);
                if (!evt.filter.includes(legendFilter)) {
                    evt.filter.push(legendFilter);
                }
            }
        }
        const evt = extension_isLegendStreamBinding(selCmpt.bind) ? selCmpt.bind.legend : 'click';
        const stream = extension_vega_util_module_isString(evt) ? extension_eventSelector(evt, 'view') : extension_vega_util_module_array(evt);
        selCmpt.bind = { legend: { merge: stream } };
    },
    topLevelSignals: (model, selCmpt, signals) => {
        const selName = selCmpt.name;
        const stream = extension_isLegendStreamBinding(selCmpt.bind) && selCmpt.bind.legend;
        const markName = (name) => (s) => {
            const ds = extension_duplicate(s);
            ds.markname = name;
            return ds;
        };
        for (const proj of selCmpt.project.items) {
            if (!proj.hasLegend)
                continue;
            const prefix = `${extension_varName(proj.field)}_legend`;
            const sgName = `${selName}_${prefix}`;
            const hasSignal = signals.filter(s => s.name === sgName);
            if (hasSignal.length === 0) {
                const events = stream.merge
                    .map(markName(`${prefix}_symbols`))
                    .concat(stream.merge.map(markName(`${prefix}_labels`)))
                    .concat(stream.merge.map(markName(`${prefix}_entries`)));
                signals.unshift({
                    name: sgName,
                    ...(!selCmpt.init ? { value: null } : {}),
                    on: [
                        // Legend entries do not store values, so we need to walk the scenegraph to the symbol datum.
                        {
                            events,
                            update: 'isDefined(datum.value) ? datum.value : item().items[0].items[0].datum.value',
                            force: true
                        },
                        { events: stream.merge, update: `!event.item || !datum ? null : ${sgName}`, force: true }
                    ]
                });
            }
        }
        return signals;
    },
    signals: (model, selCmpt, signals) => {
        const name = selCmpt.name;
        const proj = selCmpt.project;
        const tuple = signals.find(s => s.name === name + extension_TUPLE);
        const fields = name + extension_TUPLE_FIELDS;
        const values = proj.items.filter(p => p.hasLegend).map(p => extension_varName(`${name}_${extension_varName(p.field)}_legend`));
        const valid = values.map(v => `${v} !== null`).join(' && ');
        const update = `${valid} ? {fields: ${fields}, values: [${values.join(', ')}]} : null`;
        if (selCmpt.events && values.length > 0) {
            tuple.on.push({
                events: values.map(signal => ({ signal })),
                update
            });
        }
        else if (values.length > 0) {
            tuple.update = update;
            delete tuple.value;
            delete tuple.on;
        }
        const toggle = signals.find(s => s.name === name + extension_TOGGLE);
        const events = extension_isLegendStreamBinding(selCmpt.bind) && selCmpt.bind.legend;
        if (toggle) {
            if (!selCmpt.events)
                toggle.on[0].events = events;
            else
                toggle.on.push({ ...toggle.on[0], events });
        }
        return signals;
    }
};
/* harmony default export */ const extension_legends = (extension_legendBindings);
function extension_parseInteractiveLegend(model, channel, legendCmpt) {
    const field = model.fieldDef(channel)?.field;
    for (const selCmpt of extension_vals(model.component.selection ?? {})) {
        const proj = selCmpt.project.hasField[field] ?? selCmpt.project.hasChannel[channel];
        if (proj && extension_legendBindings.defined(selCmpt)) {
            const legendSelections = legendCmpt.get('selections') ?? [];
            legendSelections.push(selCmpt.name);
            legendCmpt.set('selections', legendSelections, false);
            proj.hasLegend = true;
        }
    }
}
//# sourceMappingURL=legends.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/translate.js




const extension_ANCHOR = '_translate_anchor';
const extension_DELTA = '_translate_delta';
const extension_translate_translate = {
    defined: selCmpt => {
        return selCmpt.type === 'interval' && selCmpt.translate;
    },
    signals: (model, selCmpt, signals) => {
        const name = selCmpt.name;
        const boundScales = extension_selection_scales.defined(selCmpt);
        const anchor = name + extension_ANCHOR;
        const { x, y } = selCmpt.project.hasChannel;
        let events = extension_eventSelector(selCmpt.translate, 'scope');
        if (!boundScales) {
            events = events.map(e => ((e.between[0].markname = name + extension_BRUSH), e));
        }
        signals.push({
            name: anchor,
            value: {},
            on: [
                {
                    events: events.map(e => e.between[0]),
                    update: '{x: x(unit), y: y(unit)' +
                        (x !== undefined ? `, extent_x: ${boundScales ? extension_scales_domain(model, extension_channel_X) : `slice(${x.signals.visual})`}` : '') +
                        (y !== undefined ? `, extent_y: ${boundScales ? extension_scales_domain(model, extension_channel_Y) : `slice(${y.signals.visual})`}` : '') +
                        '}'
                }
            ]
        }, {
            name: name + extension_DELTA,
            value: {},
            on: [
                {
                    events,
                    update: `{x: ${anchor}.x - x(unit), y: ${anchor}.y - y(unit)}`
                }
            ]
        });
        if (x !== undefined) {
            extension_onDelta(model, selCmpt, x, 'width', signals);
        }
        if (y !== undefined) {
            extension_onDelta(model, selCmpt, y, 'height', signals);
        }
        return signals;
    }
};
/* harmony default export */ const extension_selection_translate = (extension_translate_translate);
function extension_onDelta(model, selCmpt, proj, size, signals) {
    const name = selCmpt.name;
    const anchor = name + extension_ANCHOR;
    const delta = name + extension_DELTA;
    const channel = proj.channel;
    const boundScales = extension_selection_scales.defined(selCmpt);
    const signal = signals.find(s => s.name === proj.signals[boundScales ? 'data' : 'visual']);
    const sizeSg = model.getSizeSignalRef(size).signal;
    const scaleCmpt = model.getScaleComponent(channel);
    const scaleType = scaleCmpt && scaleCmpt.get('type');
    const reversed = scaleCmpt && scaleCmpt.get('reverse'); // scale parsing sets this flag for fieldDef.sort
    const sign = !boundScales ? '' : channel === extension_channel_X ? (reversed ? '' : '-') : reversed ? '-' : '';
    const extent = `${anchor}.extent_${channel}`;
    const offset = `${sign}${delta}.${channel} / ${boundScales ? `${sizeSg}` : `span(${extent})`}`;
    const panFn = !boundScales || !scaleCmpt
        ? 'panLinear'
        : scaleType === 'log'
            ? 'panLog'
            : scaleType === 'symlog'
                ? 'panSymlog'
                : scaleType === 'pow'
                    ? 'panPow'
                    : 'panLinear';
    const arg = !boundScales
        ? ''
        : scaleType === 'pow'
            ? `, ${scaleCmpt.get('exponent') ?? 1}`
            : scaleType === 'symlog'
                ? `, ${scaleCmpt.get('constant') ?? 1}`
                : '';
    const update = `${panFn}(${extent}, ${offset}${arg})`;
    signal.on.push({
        events: { signal: delta },
        update: boundScales ? update : `clampRange(${update}, 0, ${sizeSg})`
    });
}
//# sourceMappingURL=translate.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/zoom.js





const extension_zoom_ANCHOR = '_zoom_anchor';
const extension_zoom_DELTA = '_zoom_delta';
const extension_zoom_zoom = {
    defined: selCmpt => {
        return selCmpt.type === 'interval' && selCmpt.zoom;
    },
    signals: (model, selCmpt, signals) => {
        const name = selCmpt.name;
        const boundScales = extension_selection_scales.defined(selCmpt);
        const delta = name + extension_zoom_DELTA;
        const { x, y } = selCmpt.project.hasChannel;
        const sx = extension_$(model.scaleName(extension_channel_X));
        const sy = extension_$(model.scaleName(extension_channel_Y));
        let events = extension_eventSelector(selCmpt.zoom, 'scope');
        if (!boundScales) {
            events = events.map(e => ((e.markname = name + extension_BRUSH), e));
        }
        signals.push({
            name: name + extension_zoom_ANCHOR,
            on: [
                {
                    events,
                    update: !boundScales
                        ? `{x: x(unit), y: y(unit)}`
                        : '{' +
                            [sx ? `x: invert(${sx}, x(unit))` : '', sy ? `y: invert(${sy}, y(unit))` : '']
                                .filter(expr => expr)
                                .join(', ') +
                            '}'
                }
            ]
        }, {
            name: delta,
            on: [
                {
                    events,
                    force: true,
                    update: 'pow(1.001, event.deltaY * pow(16, event.deltaMode))'
                }
            ]
        });
        if (x !== undefined) {
            extension_zoom_onDelta(model, selCmpt, x, 'width', signals);
        }
        if (y !== undefined) {
            extension_zoom_onDelta(model, selCmpt, y, 'height', signals);
        }
        return signals;
    }
};
/* harmony default export */ const extension_selection_zoom = (extension_zoom_zoom);
function extension_zoom_onDelta(model, selCmpt, proj, size, signals) {
    const name = selCmpt.name;
    const channel = proj.channel;
    const boundScales = extension_selection_scales.defined(selCmpt);
    const signal = signals.find(s => s.name === proj.signals[boundScales ? 'data' : 'visual']);
    const sizeSg = model.getSizeSignalRef(size).signal;
    const scaleCmpt = model.getScaleComponent(channel);
    const scaleType = scaleCmpt && scaleCmpt.get('type');
    const base = boundScales ? extension_scales_domain(model, channel) : signal.name;
    const delta = name + extension_zoom_DELTA;
    const anchor = `${name}${extension_zoom_ANCHOR}.${channel}`;
    const zoomFn = !boundScales || !scaleCmpt
        ? 'zoomLinear'
        : scaleType === 'log'
            ? 'zoomLog'
            : scaleType === 'symlog'
                ? 'zoomSymlog'
                : scaleType === 'pow'
                    ? 'zoomPow'
                    : 'zoomLinear';
    const arg = !boundScales
        ? ''
        : scaleType === 'pow'
            ? `, ${scaleCmpt.get('exponent') ?? 1}`
            : scaleType === 'symlog'
                ? `, ${scaleCmpt.get('constant') ?? 1}`
                : '';
    const update = `${zoomFn}(${base}, ${anchor}, ${delta}${arg})`;
    signal.on.push({
        events: { signal: delta },
        update: boundScales ? update : `clampRange(${update}, 0, ${sizeSg})`
    });
}
//# sourceMappingURL=zoom.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/index.js
















const extension_STORE = '_store';
const extension_TUPLE = '_tuple';
const extension_MODIFY = '_modify';
const extension_SELECTION_DOMAIN = '_selection_domain_';
const extension_VL_SELECTION_RESOLVE = 'vlSelectionResolve';
// Order matters for parsing and assembly.
const extension_selectionCompilers = [
    extension_selection_point,
    extension_selection_interval,
    extension_selection_project,
    extension_selection_toggle,
    // Bindings may disable direct manipulation.
    extension_inputs,
    extension_selection_scales,
    extension_legends,
    extension_selection_clear,
    extension_selection_translate,
    extension_selection_zoom,
    extension_selection_nearest
];
function extension_getFacetModel(model) {
    let parent = model.parent;
    while (parent) {
        if (extension_isFacetModel(parent))
            break;
        parent = parent.parent;
    }
    return parent;
}
function extension_unitName(model, { escape } = { escape: true }) {
    let name = escape ? extension_$(model.name) : model.name;
    const facetModel = extension_getFacetModel(model);
    if (facetModel) {
        const { facet } = facetModel;
        for (const channel of extension_FACET_CHANNELS) {
            if (facet[channel]) {
                name += ` + '__facet_${channel}_' + (facet[${extension_$(facetModel.vgField(channel))}])`;
            }
        }
    }
    return name;
}
function extension_requiresSelectionId(model) {
    return extension_vals(model.component.selection ?? {}).reduce((identifier, selCmpt) => {
        return identifier || selCmpt.project.hasSelectionId;
    }, false);
}
// Binding a point selection to query widgets or legends disables default direct manipulation interaction.
// A user can choose to re-enable it by explicitly specifying triggering input events.
function extension_disableDirectManipulation(selCmpt, selDef) {
    if (extension_vega_util_module_isString(selDef.select) || !selDef.select.on)
        delete selCmpt.events;
    if (extension_vega_util_module_isString(selDef.select) || !selDef.select.clear)
        delete selCmpt.clear;
    if (extension_vega_util_module_isString(selDef.select) || !selDef.select.toggle)
        delete selCmpt.toggle;
}
function extension_isTimerSelection(selCmpt) {
    return selCmpt.events?.find(e => 'type' in e && e.type === 'timer');
}
//# sourceMappingURL=index.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/expressions.js

function extension_getName(node) {
    const name = [];
    if (node.type === 'Identifier') {
        return [node.name];
    }
    if (node.type === 'Literal') {
        return [node.value];
    }
    if (node.type === 'MemberExpression') {
        name.push(...extension_getName(node.object));
        name.push(...extension_getName(node.property));
    }
    return name;
}
function extension_startsWithDatum(node) {
    if (node.object.type === 'MemberExpression') {
        return extension_startsWithDatum(node.object);
    }
    return node.object.name === 'datum';
}
function extension_getDependentFields(expression) {
    const ast = extension_parser(expression);
    const dependents = new Set();
    // visit is missing in types https://github.com/vega/vega/issues/3298
    ast.visit((node) => {
        if (node.type === 'MemberExpression' && extension_startsWithDatum(node)) {
            dependents.add(extension_getName(node).slice(1).join('.'));
        }
    });
    return dependents;
}
//# sourceMappingURL=expressions.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/filter.js




class extension_FilterNode extends extension_DataFlowNode {
    clone() {
        return new extension_FilterNode(null, this.model, extension_duplicate(this.filter));
    }
    constructor(parent, model, filter) {
        super(parent);
        this.model = model;
        this.filter = filter;
        // TODO: refactor this to not take a node and
        // then add a static function makeFromOperand and make the constructor take only an expression
        this.expr = extension_predicate_expression(this.model, this.filter, this);
        this._dependentFields = extension_getDependentFields(this.expr);
    }
    dependentFields() {
        return this._dependentFields;
    }
    producedFields() {
        return new Set(); // filter does not produce any new fields
    }
    assemble() {
        return {
            type: 'filter',
            expr: this.expr
        };
    }
    hash() {
        return `Filter ${this.expr}`;
    }
}
//# sourceMappingURL=filter.js.map
;// ../../node_modules/vega-lite/build/src/compile/selection/parse.js









function extension_parseUnitSelection(model, selDefs) {
    const selCmpts = {};
    const selectionConfig = model.config.selection;
    if (!selDefs || !selDefs.length)
        return selCmpts;
    let nTimerSelections = 0;
    for (const def of selDefs) {
        const name = extension_varName(def.name);
        const selDef = def.select;
        const type = extension_vega_util_module_isString(selDef) ? selDef : selDef.type;
        const defaults = extension_vega_util_module_isObject(selDef) ? extension_duplicate(selDef) : { type };
        // Set default values from config if a property hasn't been specified,
        // or if it is true. E.g., "translate": true should use the default
        // event handlers for translate. However, true may be a valid value for
        // a property (e.g., "nearest": true).
        const cfg = selectionConfig[type];
        for (const key in cfg) {
            // Project transform applies its defaults.
            if (key === 'fields' || key === 'encodings') {
                continue;
            }
            if (key === 'mark') {
                defaults.mark = { ...cfg.mark, ...defaults.mark };
            }
            if (defaults[key] === undefined || defaults[key] === true) {
                defaults[key] = extension_duplicate(cfg[key] ?? defaults[key]);
            }
        }
        const selCmpt = (selCmpts[name] = {
            ...defaults,
            name,
            type,
            init: def.value,
            bind: def.bind,
            events: extension_vega_util_module_isString(defaults.on) ? extension_eventSelector(defaults.on, 'scope') : extension_vega_util_module_array(extension_duplicate(defaults.on))
        });
        if (extension_isTimerSelection(selCmpt)) {
            nTimerSelections++;
            // check for multiple timer selections and ignore all but the first one
            if (nTimerSelections > 1) {
                delete selCmpts[name];
                continue;
            }
        }
        const def_ = extension_duplicate(def); // defensive copy to prevent compilers from causing side effects
        for (const c of extension_selectionCompilers) {
            if (c.defined(selCmpt) && c.parse) {
                c.parse(model, selCmpt, def_);
            }
        }
    }
    if (nTimerSelections > 1) {
        // if multiple timer selections were found, issue a warning
        extension_log_warn(extension_MULTIPLE_TIMER_ANIMATION_SELECTION);
    }
    return selCmpts;
}
function extension_parseSelectionPredicate(model, pred, dfnode, datum = 'datum') {
    const name = extension_vega_util_module_isString(pred) ? pred : pred.param;
    const vname = extension_varName(name);
    const store = extension_$(vname + extension_STORE);
    let selCmpt;
    try {
        selCmpt = model.getSelectionComponent(vname, name);
    }
    catch (e) {
        // If a selection isn't found, treat as a variable parameter and coerce to boolean.
        return `!!${vname}`;
    }
    if (selCmpt.project.timeUnit) {
        const child = dfnode ?? model.component.data.raw;
        const tunode = selCmpt.project.timeUnit.clone();
        if (child.parent) {
            tunode.insertAsParentOf(child);
        }
        else {
            child.parent = tunode;
        }
    }
    const fn = selCmpt.project.hasSelectionId ? 'vlSelectionIdTest(' : 'vlSelectionTest(';
    const resolve = selCmpt.resolve === 'global' ? ')' : `, ${extension_$(selCmpt.resolve)})`;
    const test = `${fn}${store}, ${datum}${resolve}`;
    const length = `length(data(${store}))`;
    return pred.empty === false ? `${length} && ${test}` : `!${length} || ${test}`;
}
function extension_parseSelectionExtent(model, name, extent) {
    const vname = extension_varName(name);
    const encoding = extent.encoding;
    let field = extent.field;
    let selCmpt;
    try {
        selCmpt = model.getSelectionComponent(vname, name);
    }
    catch (e) {
        // If a selection isn't found, treat it as a variable parameter.
        return vname;
    }
    if (!encoding && !field) {
        field = selCmpt.project.items[0].field;
        if (selCmpt.project.items.length > 1) {
            extension_log_warn(extension_selectionAsScaleDomainWithoutField(field));
        }
    }
    else if (encoding && !field) {
        const encodings = selCmpt.project.items.filter(p => p.channel === encoding);
        if (!encodings.length || encodings.length > 1) {
            field = selCmpt.project.items[0].field;
            extension_log_warn(extension_selectionAsScaleDomainWrongEncodings(encodings, encoding, extent, field));
        }
        else {
            field = encodings[0].field;
        }
    }
    return `${selCmpt.name}[${extension_$(extension_replacePathInField(field))}]`;
}
function extension_materializeSelections(model, main) {
    for (const [selection, selCmpt] of extension_util_entries(model.component.selection ?? {})) {
        const lookupName = model.getName(`lookup_${selection}`);
        model.component.data.outputNodes[lookupName] = selCmpt.materialized = new extension_OutputNode(new extension_FilterNode(main, model, { param: selection }), lookupName, extension_DataSourceType.Lookup, model.component.data.outputNodeRefCounts);
    }
}
//# sourceMappingURL=parse.js.map
;// ../../node_modules/vega-lite/build/src/compile/predicate.js




/**
 * Converts a predicate into an expression.
 */
// model is only used for selection filters.
function extension_predicate_expression(model, filterOp, node) {
    return extension_logicalExpr(filterOp, (predicate) => {
        if (extension_vega_util_module_isString(predicate)) {
            return predicate;
        }
        else if (extension_isSelectionPredicate(predicate)) {
            return extension_parseSelectionPredicate(model, predicate, node);
        }
        else {
            // Filter Object
            return extension_fieldFilterExpression(predicate);
        }
    });
}
//# sourceMappingURL=predicate.js.map
;// ../../node_modules/vega-lite/build/src/compile/axis/assemble.js









function extension_assembleTitle(title, config) {
    if (!title) {
        return undefined;
    }
    if (extension_vega_util_module_isArray(title) && !extension_isText(title)) {
        return title.map(fieldDef => extension_defaultTitle(fieldDef, config)).join(', ');
    }
    return title;
}
function extension_setAxisEncode(axis, part, vgProp, vgRef) {
    var _a, _b;
    axis.encode ?? (axis.encode = {});
    (_a = axis.encode)[part] ?? (_a[part] = {});
    (_b = axis.encode[part]).update ?? (_b.update = {});
    // TODO: remove as any after https://github.com/prisma/nexus-prisma/issues/291
    axis.encode[part].update[vgProp] = vgRef;
}
function extension_assembleAxis(axisCmpt, kind, config, opt = { header: false }) {
    const { disable, orient, scale, labelExpr, title, zindex, ...axis } = axisCmpt.combine();
    if (disable) {
        return undefined;
    }
    for (const p in axis) {
        const prop = p;
        const propType = extension_AXIS_PROPERTY_TYPE[prop];
        const propValue = axis[prop];
        if (propType && propType !== kind && propType !== 'both') {
            // Remove properties that are not valid for this kind of axis
            delete axis[prop];
        }
        else if (extension_isConditionalAxisValue(propValue)) {
            // deal with conditional axis value
            const { condition, ...valueOrSignalRef } = propValue;
            const conditions = extension_vega_util_module_array(condition);
            const propIndex = extension_CONDITIONAL_AXIS_PROP_INDEX[prop];
            if (propIndex) {
                const { vgProp, part } = propIndex;
                // If there is a corresponding Vega property for the channel,
                // use Vega's custom axis encoding and delete the original axis property to avoid conflicts
                const vgRef = [
                    ...conditions.map(c => {
                        const { test, ...valueOrSignalCRef } = c;
                        return {
                            test: extension_predicate_expression(null, test),
                            ...valueOrSignalCRef
                        };
                    }),
                    valueOrSignalRef
                ];
                extension_setAxisEncode(axis, part, vgProp, vgRef);
                delete axis[prop];
            }
            else if (propIndex === null) {
                // If propIndex is null, this means we support conditional axis property by converting the condition to signal instead.
                const signalRef = {
                    signal: conditions
                        .map(c => {
                        const { test, ...valueOrSignalCRef } = c;
                        return `${extension_predicate_expression(null, test)} ? ${extension_exprFromValueRefOrSignalRef(valueOrSignalCRef)} : `;
                    })
                        .join('') + extension_exprFromValueRefOrSignalRef(valueOrSignalRef)
                };
                axis[prop] = signalRef;
            }
        }
        else if (extension_isSignalRef(propValue)) {
            const propIndex = extension_CONDITIONAL_AXIS_PROP_INDEX[prop];
            if (propIndex) {
                const { vgProp, part } = propIndex;
                // FIXME: remove as any
                extension_setAxisEncode(axis, part, vgProp, propValue);
                delete axis[prop];
            } // else do nothing since the property already supports signal
        }
        // Do not pass labelAlign/Baseline = null to Vega since it won't pass the schema
        // Note that we need to use null so the default labelAlign is preserved.
        if (extension_util_contains(['labelAlign', 'labelBaseline'], prop) && axis[prop] === null) {
            delete axis[prop];
        }
    }
    if (kind === 'grid') {
        if (!axis.grid) {
            return undefined;
        }
        // Remove unnecessary encode block
        if (axis.encode) {
            // Only need to keep encode block for grid
            const { grid } = axis.encode;
            axis.encode = {
                ...(grid ? { grid } : {})
            };
            if (extension_isEmpty(axis.encode)) {
                delete axis.encode;
            }
        }
        return {
            scale,
            orient,
            ...axis,
            domain: false,
            labels: false,
            aria: false, // always hide grid axis
            // Always set min/maxExtent to 0 to ensure that `config.axis*.minExtent` and `config.axis*.maxExtent`
            // would not affect gridAxis
            maxExtent: 0,
            minExtent: 0,
            ticks: false,
            zindex: extension_getFirstDefined(zindex, 0) // put grid behind marks by default
        };
    }
    else {
        // kind === 'main'
        if (!opt.header && axisCmpt.mainExtracted) {
            // if mainExtracted has been extracted to a separate facet
            return undefined;
        }
        if (labelExpr !== undefined) {
            let expr = labelExpr;
            if (axis.encode?.labels?.update && extension_isSignalRef(axis.encode.labels.update.text)) {
                expr = extension_replaceAll(labelExpr, 'datum.label', axis.encode.labels.update.text.signal);
            }
            extension_setAxisEncode(axis, 'labels', 'text', { signal: expr });
        }
        if (axis.labelAlign === null) {
            delete axis.labelAlign;
        }
        // Remove unnecessary encode block
        if (axis.encode) {
            for (const part of extension_AXIS_PARTS) {
                if (!axisCmpt.hasAxisPart(part)) {
                    delete axis.encode[part];
                }
            }
            if (extension_isEmpty(axis.encode)) {
                delete axis.encode;
            }
        }
        const titleString = extension_assembleTitle(title, config);
        return {
            scale,
            orient,
            grid: false,
            ...(titleString ? { title: titleString } : {}),
            ...axis,
            ...(config.aria === false ? { aria: false } : {}),
            zindex: extension_getFirstDefined(zindex, 0) // put axis line above marks by default
        };
    }
}
/**
 * Add axis signals so grid line works correctly
 * (Fix https://github.com/vega/vega-lite/issues/4226)
 */
function extension_assembleAxisSignals(model) {
    const { axes } = model.component;
    const signals = [];
    for (const channel of extension_POSITION_SCALE_CHANNELS) {
        if (axes[channel]) {
            for (const axis of axes[channel]) {
                if (!axis.get('disable') && !axis.get('gridScale')) {
                    // If there is x-axis but no y-scale for gridScale, need to set height/width so x-axis can draw the grid with the right height. Same for y-axis and width.
                    const sizeType = channel === 'x' ? 'height' : 'width';
                    const update = model.getSizeSignalRef(sizeType).signal;
                    if (sizeType !== update) {
                        signals.push({
                            name: sizeType,
                            update
                        });
                    }
                }
            }
        }
    }
    return signals;
}
function extension_assembleAxes(axisComponents, config) {
    const { x = [], y = [] } = axisComponents;
    return [
        ...x.map(a => extension_assembleAxis(a, 'grid', config)),
        ...y.map(a => extension_assembleAxis(a, 'grid', config)),
        ...x.map(a => extension_assembleAxis(a, 'main', config)),
        ...y.map(a => extension_assembleAxis(a, 'main', config))
    ].filter(a => a); // filter undefined
}
//# sourceMappingURL=assemble.js.map
;// ../../node_modules/vega-lite/build/src/compile/axis/config.js





function extension_getAxisConfigFromConfigTypes(configTypes, config, channel, orient) {
    // TODO: add special casing to add conditional value based on orient signal
    return Object.assign.apply(null, [
        {},
        ...configTypes.map(configType => {
            if (configType === 'axisOrient') {
                const orient1 = channel === 'x' ? 'bottom' : 'left';
                const orientConfig1 = config[channel === 'x' ? 'axisBottom' : 'axisLeft'] || {};
                const orientConfig2 = config[channel === 'x' ? 'axisTop' : 'axisRight'] || {};
                const props = new Set([...extension_util_keys(orientConfig1), ...extension_util_keys(orientConfig2)]);
                const conditionalOrientAxisConfig = {};
                for (const prop of props.values()) {
                    conditionalOrientAxisConfig[prop] = {
                        // orient is surely signal in this case
                        signal: `${orient['signal']} === "${orient1}" ? ${extension_signalOrStringValue(orientConfig1[prop])} : ${extension_signalOrStringValue(orientConfig2[prop])}`
                    };
                }
                return conditionalOrientAxisConfig;
            }
            return config[configType];
        })
    ]);
}
function extension_getAxisConfigs(channel, scaleType, orient, config) {
    const typeBasedConfigTypes = scaleType === 'band'
        ? ['axisDiscrete', 'axisBand']
        : scaleType === 'point'
            ? ['axisDiscrete', 'axisPoint']
            : extension_isQuantitative(scaleType)
                ? ['axisQuantitative']
                : scaleType === 'time' || scaleType === 'utc'
                    ? ['axisTemporal']
                    : [];
    const axisChannel = channel === 'x' ? 'axisX' : 'axisY';
    const axisOrient = extension_isSignalRef(orient) ? 'axisOrient' : `axis${extension_titleCase(orient)}`; // axisTop, axisBottom, ...
    const vlOnlyConfigTypes = [
        // technically Vega does have axisBand, but if we make another separation here,
        // it will further introduce complexity in the code
        ...typeBasedConfigTypes,
        ...typeBasedConfigTypes.map(c => axisChannel + c.substr(4))
    ];
    const vgConfigTypes = ['axis', axisOrient, axisChannel];
    return {
        vlOnlyAxisConfig: extension_getAxisConfigFromConfigTypes(vlOnlyConfigTypes, config, channel, orient),
        vgAxisConfig: extension_getAxisConfigFromConfigTypes(vgConfigTypes, config, channel, orient),
        axisConfigStyle: extension_getAxisConfigStyle([...vgConfigTypes, ...vlOnlyConfigTypes], config)
    };
}
function extension_getAxisConfigStyle(axisConfigTypes, config) {
    const toMerge = [{}];
    for (const configType of axisConfigTypes) {
        // TODO: add special casing to add conditional value based on orient signal
        let style = config[configType]?.style;
        if (style) {
            style = extension_vega_util_module_array(style);
            for (const s of style) {
                toMerge.push(config.style[s]);
            }
        }
    }
    return Object.assign.apply(null, toMerge);
}
function extension_getAxisConfig(property, styleConfigIndex, style, axisConfigs = {}) {
    const styleConfig = extension_getStyleConfig(property, style, styleConfigIndex);
    if (styleConfig !== undefined) {
        return {
            configFrom: 'style',
            configValue: styleConfig
        };
    }
    for (const configFrom of ['vlOnlyAxisConfig', 'vgAxisConfig', 'axisConfigStyle']) {
        if (axisConfigs[configFrom]?.[property] !== undefined) {
            return { configFrom, configValue: axisConfigs[configFrom][property] };
        }
    }
    return {};
}
//# sourceMappingURL=config.js.map
;// ../../node_modules/vega-lite/build/src/compile/axis/properties.js











const extension_axisRules = {
    scale: ({ model, channel }) => model.scaleName(channel),
    format: ({ format }) => format, // we already calculate this in parse
    formatType: ({ formatType }) => formatType, // we already calculate this in parse
    grid: ({ fieldOrDatumDef, axis, scaleType }) => axis.grid ?? extension_defaultGrid(scaleType, fieldOrDatumDef),
    gridScale: ({ model, channel }) => extension_gridScale(model, channel),
    labelAlign: ({ axis, labelAngle, orient, channel }) => axis.labelAlign || extension_defaultLabelAlign(labelAngle, orient, channel),
    labelAngle: ({ labelAngle }) => labelAngle, // we already calculate this in parse
    labelBaseline: ({ axis, labelAngle, orient, channel }) => axis.labelBaseline || extension_defaultLabelBaseline(labelAngle, orient, channel),
    labelFlush: ({ axis, fieldOrDatumDef, channel }) => axis.labelFlush ?? extension_defaultLabelFlush(fieldOrDatumDef.type, channel),
    labelOverlap: ({ axis, fieldOrDatumDef, scaleType }) => axis.labelOverlap ??
        extension_defaultLabelOverlap(fieldOrDatumDef.type, scaleType, extension_isFieldDef(fieldOrDatumDef) && !!fieldOrDatumDef.timeUnit, extension_isFieldDef(fieldOrDatumDef) ? fieldOrDatumDef.sort : undefined),
    // we already calculate orient in parse
    orient: ({ orient }) => orient, // Need to cast until Vega supports signal
    tickCount: ({ channel, model, axis, fieldOrDatumDef, scaleType }) => {
        const sizeType = channel === 'x' ? 'width' : channel === 'y' ? 'height' : undefined;
        const size = sizeType ? model.getSizeSignalRef(sizeType) : undefined;
        return axis.tickCount ?? extension_defaultTickCount({ fieldOrDatumDef, scaleType, size, values: axis.values });
    },
    tickMinStep: extension_defaultTickMinStep,
    title: ({ axis, model, channel }) => {
        if (axis.title !== undefined) {
            return axis.title;
        }
        const fieldDefTitle = extension_getFieldDefTitle(model, channel);
        if (fieldDefTitle !== undefined) {
            return fieldDefTitle;
        }
        const fieldDef = model.typedFieldDef(channel);
        const channel2 = channel === 'x' ? 'x2' : 'y2';
        const fieldDef2 = model.fieldDef(channel2);
        // If title not specified, store base parts of fieldDef (and fieldDef2 if exists)
        return extension_mergeTitleFieldDefs(fieldDef ? [extension_toFieldDefBase(fieldDef)] : [], extension_isFieldDef(fieldDef2) ? [extension_toFieldDefBase(fieldDef2)] : []);
    },
    values: ({ axis, fieldOrDatumDef }) => extension_properties_values(axis, fieldOrDatumDef),
    zindex: ({ axis, fieldOrDatumDef, mark }) => axis.zindex ?? extension_defaultZindex(mark, fieldOrDatumDef)
};
// TODO: we need to refactor this method after we take care of config refactoring
/**
 * Default rules for whether to show a grid should be shown for a channel.
 * If `grid` is unspecified, the default value is `true` for ordinal scales that are not binned
 */
function extension_defaultGrid(scaleType, fieldDef) {
    return !extension_hasDiscreteDomain(scaleType) && extension_isFieldDef(fieldDef) && !extension_isBinning(fieldDef?.bin) && !extension_isBinned(fieldDef?.bin);
}
function extension_gridScale(model, channel) {
    const gridChannel = channel === 'x' ? 'y' : 'x';
    if (model.getScaleComponent(gridChannel)) {
        return model.scaleName(gridChannel);
    }
    return undefined;
}
function extension_getLabelAngle(fieldOrDatumDef, axis, channel, styleConfig, axisConfigs) {
    const labelAngle = axis?.labelAngle;
    // try axis value
    if (labelAngle !== undefined) {
        return extension_isSignalRef(labelAngle) ? labelAngle : extension_normalizeAngle(labelAngle);
    }
    else {
        // try axis config value
        const { configValue: angle } = extension_getAxisConfig('labelAngle', styleConfig, axis?.style, axisConfigs);
        if (angle !== undefined) {
            return extension_normalizeAngle(angle);
        }
        else {
            // get default value
            if (channel === extension_channel_X &&
                extension_util_contains([extension_NOMINAL, extension_ORDINAL], fieldOrDatumDef.type) &&
                !(extension_isFieldDef(fieldOrDatumDef) && fieldOrDatumDef.timeUnit)) {
                return 270;
            }
            // no default
            return undefined;
        }
    }
}
function extension_normalizeAngleExpr(angle) {
    return `(((${angle.signal} % 360) + 360) % 360)`;
}
function extension_defaultLabelBaseline(angle, orient, channel, alwaysIncludeMiddle) {
    if (angle !== undefined) {
        if (channel === 'x') {
            if (extension_isSignalRef(angle)) {
                const a = extension_normalizeAngleExpr(angle);
                const orientIsTop = extension_isSignalRef(orient) ? `(${orient.signal} === "top")` : orient === 'top';
                return {
                    signal: `(45 < ${a} && ${a} < 135) || (225 < ${a} && ${a} < 315) ? "middle" :` +
                        `(${a} <= 45 || 315 <= ${a}) === ${orientIsTop} ? "bottom" : "top"`
                };
            }
            if ((45 < angle && angle < 135) || (225 < angle && angle < 315)) {
                return 'middle';
            }
            if (extension_isSignalRef(orient)) {
                const op = angle <= 45 || 315 <= angle ? '===' : '!==';
                return { signal: `${orient.signal} ${op} "top" ? "bottom" : "top"` };
            }
            return (angle <= 45 || 315 <= angle) === (orient === 'top') ? 'bottom' : 'top';
        }
        else {
            if (extension_isSignalRef(angle)) {
                const a = extension_normalizeAngleExpr(angle);
                const orientIsLeft = extension_isSignalRef(orient) ? `(${orient.signal} === "left")` : orient === 'left';
                const middle = alwaysIncludeMiddle ? '"middle"' : 'null';
                return {
                    signal: `${a} <= 45 || 315 <= ${a} || (135 <= ${a} && ${a} <= 225) ? ${middle} : (45 <= ${a} && ${a} <= 135) === ${orientIsLeft} ? "top" : "bottom"`
                };
            }
            if (angle <= 45 || 315 <= angle || (135 <= angle && angle <= 225)) {
                return alwaysIncludeMiddle ? 'middle' : null;
            }
            if (extension_isSignalRef(orient)) {
                const op = 45 <= angle && angle <= 135 ? '===' : '!==';
                return { signal: `${orient.signal} ${op} "left" ? "top" : "bottom"` };
            }
            return (45 <= angle && angle <= 135) === (orient === 'left') ? 'top' : 'bottom';
        }
    }
    return undefined;
}
function extension_defaultLabelAlign(angle, orient, channel) {
    if (angle === undefined) {
        return undefined;
    }
    const isX = channel === 'x';
    const startAngle = isX ? 0 : 90;
    const mainOrient = isX ? 'bottom' : 'left';
    if (extension_isSignalRef(angle)) {
        const a = extension_normalizeAngleExpr(angle);
        const orientIsMain = extension_isSignalRef(orient) ? `(${orient.signal} === "${mainOrient}")` : orient === mainOrient;
        return {
            signal: `(${startAngle ? `(${a} + 90)` : a} % 180 === 0) ? ${isX ? null : '"center"'} :` +
                `(${startAngle} < ${a} && ${a} < ${180 + startAngle}) === ${orientIsMain} ? "left" : "right"`
        };
    }
    if ((angle + startAngle) % 180 === 0) {
        // For bottom, use default label align so label flush still works
        return isX ? null : 'center';
    }
    if (extension_isSignalRef(orient)) {
        const op = startAngle < angle && angle < 180 + startAngle ? '===' : '!==';
        const orientIsMain = `${orient.signal} ${op} "${mainOrient}"`;
        return {
            signal: `${orientIsMain} ? "left" : "right"`
        };
    }
    if ((startAngle < angle && angle < 180 + startAngle) === (orient === mainOrient)) {
        return 'left';
    }
    return 'right';
}
function extension_defaultLabelFlush(type, channel) {
    if (channel === 'x' && extension_util_contains(['quantitative', 'temporal'], type)) {
        return true;
    }
    return undefined;
}
function extension_defaultLabelOverlap(type, scaleType, hasTimeUnit, sort) {
    // do not prevent overlap for nominal data because there is no way to infer what the missing labels are
    if ((hasTimeUnit && !extension_vega_util_module_isObject(sort)) || (type !== 'nominal' && type !== 'ordinal')) {
        if (scaleType === 'log' || scaleType === 'symlog') {
            return 'greedy';
        }
        return true;
    }
    return undefined;
}
function extension_defaultOrient(channel) {
    return channel === 'x' ? 'bottom' : 'left';
}
function extension_defaultTickCount({ fieldOrDatumDef, scaleType, size, values: vals }) {
    if (!vals && !extension_hasDiscreteDomain(scaleType) && scaleType !== 'log') {
        if (extension_isFieldDef(fieldOrDatumDef)) {
            if (extension_isBinning(fieldOrDatumDef.bin)) {
                // for binned data, we don't want more ticks than maxbins
                return { signal: `ceil(${size.signal}/10)` };
            }
            if (fieldOrDatumDef.timeUnit &&
                extension_util_contains(['month', 'hours', 'day', 'quarter'], extension_normalizeTimeUnit(fieldOrDatumDef.timeUnit)?.unit)) {
                return undefined;
            }
        }
        return { signal: `ceil(${size.signal}/40)` };
    }
    return undefined;
}
function extension_defaultTickMinStep({ format, fieldOrDatumDef }) {
    if (format === 'd') {
        return 1;
    }
    if (extension_isFieldDef(fieldOrDatumDef)) {
        const { timeUnit } = fieldOrDatumDef;
        if (timeUnit) {
            const signal = extension_durationExpr(timeUnit);
            if (signal) {
                return { signal };
            }
        }
    }
    return undefined;
}
function extension_getFieldDefTitle(model, channel) {
    const channel2 = channel === 'x' ? 'x2' : 'y2';
    const fieldDef = model.fieldDef(channel);
    const fieldDef2 = model.fieldDef(channel2);
    const title1 = fieldDef ? fieldDef.title : undefined;
    const title2 = fieldDef2 ? fieldDef2.title : undefined;
    if (title1 && title2) {
        return extension_mergeTitle(title1, title2);
    }
    else if (title1) {
        return title1;
    }
    else if (title2) {
        return title2;
    }
    else if (title1 !== undefined) {
        // falsy value to disable config
        return title1;
    }
    else if (title2 !== undefined) {
        // falsy value to disable config
        return title2;
    }
    return undefined;
}
function extension_properties_values(axis, fieldOrDatumDef) {
    const vals = axis.values;
    if (extension_vega_util_module_isArray(vals)) {
        return extension_valueArray(fieldOrDatumDef, vals);
    }
    else if (extension_isSignalRef(vals)) {
        return vals;
    }
    return undefined;
}
function extension_defaultZindex(mark, fieldDef) {
    if (mark === 'rect' && extension_channeldef_isDiscrete(fieldDef)) {
        return 1;
    }
    return 0;
}
//# sourceMappingURL=properties.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/calculate.js






class extension_CalculateNode extends extension_DataFlowNode {
    clone() {
        return new extension_CalculateNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
        this._dependentFields = extension_getDependentFields(this.transform.calculate);
    }
    static parseAllForSortIndex(parent, model) {
        // get all the encoding with sort fields from model
        model.forEachFieldDef((fieldDef, channel) => {
            if (!extension_isScaleFieldDef(fieldDef)) {
                return;
            }
            if (extension_isSortArray(fieldDef.sort)) {
                const { field, timeUnit } = fieldDef;
                const sort = fieldDef.sort;
                // generate `datum["a"] === val0 ? 0 : datum["a"] === val1 ? 1 : ... : n` via FieldEqualPredicate
                const calculate = sort
                    .map((sortValue, i) => {
                    return `${extension_fieldFilterExpression({ field, timeUnit, equal: sortValue })} ? ${i} : `;
                })
                    .join('') + sort.length;
                parent = new extension_CalculateNode(parent, {
                    calculate,
                    as: extension_sortArrayIndexField(fieldDef, channel, { forAs: true })
                });
            }
        });
        return parent;
    }
    producedFields() {
        return new Set([this.transform.as]);
    }
    dependentFields() {
        return this._dependentFields;
    }
    assemble() {
        return {
            type: 'formula',
            expr: this.transform.calculate,
            as: this.transform.as
        };
    }
    hash() {
        return `Calculate ${extension_util_hash(this.transform)}`;
    }
}
function extension_sortArrayIndexField(fieldDef, channel, opt) {
    return extension_vgField(fieldDef, { prefix: channel, suffix: 'sort_index', ...opt });
}
//# sourceMappingURL=calculate.js.map
;// ../../node_modules/vega-lite/build/src/compile/header/common.js

/**
 * Get header channel, which can be different from facet channel when orient is specified or when the facet channel is facet.
 */
function extension_getHeaderChannel(channel, orient) {
    if (extension_util_contains(['top', 'bottom'], orient)) {
        return 'column';
    }
    else if (extension_util_contains(['left', 'right'], orient)) {
        return 'row';
    }
    return channel === 'row' ? 'row' : 'column';
}
function extension_getHeaderProperty(prop, header, config, channel) {
    const headerSpecificConfig = channel === 'row' ? config.headerRow : channel === 'column' ? config.headerColumn : config.headerFacet;
    return extension_getFirstDefined((header || {})[prop], headerSpecificConfig[prop], config.header[prop]);
}
function extension_getHeaderProperties(properties, header, config, channel) {
    const props = {};
    for (const prop of properties) {
        const value = extension_getHeaderProperty(prop, header || {}, config, channel);
        if (value !== undefined) {
            props[prop] = value;
        }
    }
    return props;
}
//# sourceMappingURL=common.js.map
;// ../../node_modules/vega-lite/build/src/compile/header/component.js
const extension_HEADER_CHANNELS = ['row', 'column'];
const extension_HEADER_TYPES = ['header', 'footer'];
//# sourceMappingURL=component.js.map
;// ../../node_modules/vega-lite/build/src/compile/header/assemble.js
/**
 * Utility for generating row / column headers
 */













// TODO: rename to assembleHeaderTitleGroup
function extension_assembleTitleGroup(model, channel) {
    const title = model.component.layoutHeaders[channel].title;
    const config = model.config ? model.config : undefined;
    const facetFieldDef = model.component.layoutHeaders[channel].facetFieldDef
        ? model.component.layoutHeaders[channel].facetFieldDef
        : undefined;
    const { titleAnchor, titleAngle: ta, titleOrient } = extension_getHeaderProperties(['titleAnchor', 'titleAngle', 'titleOrient'], facetFieldDef.header, config, channel);
    const headerChannel = extension_getHeaderChannel(channel, titleOrient);
    const titleAngle = extension_normalizeAngle(ta);
    return {
        name: `${channel}-title`,
        type: 'group',
        role: `${headerChannel}-title`,
        title: {
            text: title,
            ...(channel === 'row' ? { orient: 'left' } : {}),
            style: 'guide-title',
            ...extension_defaultHeaderGuideBaseline(titleAngle, headerChannel),
            ...extension_defaultHeaderGuideAlign(headerChannel, titleAngle, titleAnchor),
            ...extension_assembleHeaderProperties(config, facetFieldDef, channel, extension_HEADER_TITLE_PROPERTIES, extension_HEADER_TITLE_PROPERTIES_MAP)
        }
    };
}
function extension_defaultHeaderGuideAlign(headerChannel, angle, anchor = 'middle') {
    switch (anchor) {
        case 'start':
            return { align: 'left' };
        case 'end':
            return { align: 'right' };
    }
    const align = extension_defaultLabelAlign(angle, headerChannel === 'row' ? 'left' : 'top', headerChannel === 'row' ? 'y' : 'x');
    return align ? { align } : {};
}
function extension_defaultHeaderGuideBaseline(angle, channel) {
    const baseline = extension_defaultLabelBaseline(angle, channel === 'row' ? 'left' : 'top', channel === 'row' ? 'y' : 'x', true);
    return baseline ? { baseline } : {};
}
function extension_assembleHeaderGroups(model, channel) {
    const layoutHeader = model.component.layoutHeaders[channel];
    const groups = [];
    for (const headerType of extension_HEADER_TYPES) {
        if (layoutHeader[headerType]) {
            for (const headerComponent of layoutHeader[headerType]) {
                const group = extension_assembleHeaderGroup(model, channel, headerType, layoutHeader, headerComponent);
                if (group != null) {
                    groups.push(group);
                }
            }
        }
    }
    return groups;
}
function extension_getSort(facetFieldDef, channel) {
    const { sort } = facetFieldDef;
    if (extension_isSortField(sort)) {
        return {
            field: extension_vgField(sort, { expr: 'datum' }),
            order: sort.order ?? 'ascending'
        };
    }
    else if (extension_vega_util_module_isArray(sort)) {
        return {
            field: extension_sortArrayIndexField(facetFieldDef, channel, { expr: 'datum' }),
            order: 'ascending'
        };
    }
    else {
        return {
            field: extension_vgField(facetFieldDef, { expr: 'datum' }),
            order: sort ?? 'ascending'
        };
    }
}
function extension_assembleLabelTitle(facetFieldDef, channel, config) {
    const { format, formatType, labelAngle, labelAnchor, labelOrient, labelExpr } = extension_getHeaderProperties(['format', 'formatType', 'labelAngle', 'labelAnchor', 'labelOrient', 'labelExpr'], facetFieldDef.header, config, channel);
    const titleTextExpr = extension_formatSignalRef({
        fieldOrDatumDef: facetFieldDef,
        format,
        formatType,
        expr: 'parent',
        config
    }).signal;
    const headerChannel = extension_getHeaderChannel(channel, labelOrient);
    return {
        text: {
            signal: labelExpr
                ? extension_replaceAll(extension_replaceAll(labelExpr, 'datum.label', titleTextExpr), 'datum.value', extension_vgField(facetFieldDef, { expr: 'parent' }))
                : titleTextExpr
        },
        ...(channel === 'row' ? { orient: 'left' } : {}),
        style: 'guide-label',
        frame: 'group',
        ...extension_defaultHeaderGuideBaseline(labelAngle, headerChannel),
        ...extension_defaultHeaderGuideAlign(headerChannel, labelAngle, labelAnchor),
        ...extension_assembleHeaderProperties(config, facetFieldDef, channel, extension_HEADER_LABEL_PROPERTIES, extension_HEADER_LABEL_PROPERTIES_MAP)
    };
}
function extension_assembleHeaderGroup(model, channel, headerType, layoutHeader, headerComponent) {
    if (headerComponent) {
        let title = null;
        const { facetFieldDef } = layoutHeader;
        const config = model.config ? model.config : undefined;
        if (facetFieldDef && headerComponent.labels) {
            const { labelOrient } = extension_getHeaderProperties(['labelOrient'], facetFieldDef.header, config, channel);
            // Include label title in the header if orient aligns with the channel
            if ((channel === 'row' && !extension_util_contains(['top', 'bottom'], labelOrient)) ||
                (channel === 'column' && !extension_util_contains(['left', 'right'], labelOrient))) {
                title = extension_assembleLabelTitle(facetFieldDef, channel, config);
            }
        }
        const isFacetWithoutRowCol = extension_isFacetModel(model) && !extension_isFacetMapping(model.facet);
        const axes = headerComponent.axes;
        const hasAxes = axes?.length > 0;
        if (title || hasAxes) {
            const sizeChannel = channel === 'row' ? 'height' : 'width';
            return {
                name: model.getName(`${channel}_${headerType}`),
                type: 'group',
                role: `${channel}-${headerType}`,
                ...(layoutHeader.facetFieldDef
                    ? {
                        from: { data: model.getName(`${channel}_domain`) },
                        sort: extension_getSort(facetFieldDef, channel)
                    }
                    : {}),
                ...(hasAxes && isFacetWithoutRowCol
                    ? {
                        from: { data: model.getName(`facet_domain_${channel}`) }
                    }
                    : {}),
                ...(title ? { title } : {}),
                ...(headerComponent.sizeSignal
                    ? {
                        encode: {
                            update: {
                                [sizeChannel]: headerComponent.sizeSignal
                            }
                        }
                    }
                    : {}),
                ...(hasAxes ? { axes } : {})
            };
        }
    }
    return null;
}
const extension_LAYOUT_TITLE_BAND = {
    column: {
        start: 0,
        end: 1
    },
    row: {
        start: 1,
        end: 0
    }
};
function extension_getLayoutTitleBand(titleAnchor, headerChannel) {
    return extension_LAYOUT_TITLE_BAND[headerChannel][titleAnchor];
}
function extension_assembleLayoutTitleBand(headerComponentIndex, config) {
    const titleBand = {};
    for (const channel of extension_FACET_CHANNELS) {
        const headerComponent = headerComponentIndex[channel];
        if (headerComponent?.facetFieldDef) {
            const { titleAnchor, titleOrient } = extension_getHeaderProperties(['titleAnchor', 'titleOrient'], headerComponent.facetFieldDef.header, config, channel);
            const headerChannel = extension_getHeaderChannel(channel, titleOrient);
            const band = extension_getLayoutTitleBand(titleAnchor, headerChannel);
            if (band !== undefined) {
                titleBand[headerChannel] = band;
            }
        }
    }
    return extension_isEmpty(titleBand) ? undefined : titleBand;
}
function extension_assembleHeaderProperties(config, facetFieldDef, channel, properties, propertiesMap) {
    const props = {};
    for (const prop of properties) {
        if (!propertiesMap[prop]) {
            continue;
        }
        const value = extension_getHeaderProperty(prop, facetFieldDef?.header, config, channel);
        if (value !== undefined) {
            props[propertiesMap[prop]] = value;
        }
    }
    return props;
}
//# sourceMappingURL=assemble.js.map
;// ../../node_modules/vega-lite/build/src/compile/layoutsize/assemble.js






function extension_assembleLayoutSignals(model) {
    return [
        ...extension_sizeSignals(model, 'width'),
        ...extension_sizeSignals(model, 'height'),
        ...extension_sizeSignals(model, 'childWidth'),
        ...extension_sizeSignals(model, 'childHeight')
    ];
}
function extension_sizeSignals(model, sizeType) {
    const channel = sizeType === 'width' ? 'x' : 'y';
    const size = model.component.layoutSize.get(sizeType);
    if (!size || size === 'merged') {
        return [];
    }
    // Read size signal name from name map, just in case it is the top-level size signal that got renamed.
    const name = model.getSizeSignalRef(sizeType).signal;
    if (size === 'step') {
        const scaleComponent = model.getScaleComponent(channel);
        if (scaleComponent) {
            const type = scaleComponent.get('type');
            const range = scaleComponent.get('range');
            if (extension_hasDiscreteDomain(type) && extension_isVgRangeStep(range)) {
                const scaleName = model.scaleName(channel);
                if (extension_isFacetModel(model.parent)) {
                    // If parent is facet and this is an independent scale, return only signal signal
                    // as the width/height will be calculated using the cardinality from
                    // facet's aggregate rather than reading from scale domain
                    const parentResolve = model.parent.component.resolve;
                    if (parentResolve.scale[channel] === 'independent') {
                        return [extension_stepSignal(scaleName, range)];
                    }
                }
                return [
                    extension_stepSignal(scaleName, range),
                    {
                        name,
                        update: extension_sizeExpr(scaleName, scaleComponent, `domain('${scaleName}').length`)
                    }
                ];
            }
        }
        /* istanbul ignore next: Condition should not happen -- only for warning in development. */
        throw new Error('layout size is step although width/height is not step.');
    }
    else if (size == 'container') {
        const isWidth = name.endsWith('width');
        const expr = isWidth ? 'containerSize()[0]' : 'containerSize()[1]';
        const defaultValue = extension_getViewConfigContinuousSize(model.config.view, isWidth ? 'width' : 'height');
        const safeExpr = `isFinite(${expr}) ? ${expr} : ${defaultValue}`;
        return [{ name, init: safeExpr, on: [{ update: safeExpr, events: 'window:resize' }] }];
    }
    else {
        return [
            {
                name,
                value: size
            }
        ];
    }
}
function extension_stepSignal(scaleName, range) {
    const name = `${scaleName}_step`;
    if (extension_isSignalRef(range.step)) {
        return { name, update: range.step.signal };
    }
    else {
        return { name, value: range.step };
    }
}
function extension_sizeExpr(scaleName, scaleComponent, cardinality) {
    const type = scaleComponent.get('type');
    const padding = scaleComponent.get('padding');
    const paddingOuter = extension_getFirstDefined(scaleComponent.get('paddingOuter'), padding);
    let paddingInner = scaleComponent.get('paddingInner');
    paddingInner =
        type === 'band'
            ? // only band has real paddingInner
                paddingInner !== undefined
                    ? paddingInner
                    : padding
            : // For point, as calculated in https://github.com/vega/vega-scale/blob/master/src/band.js#L128,
                // it's equivalent to have paddingInner = 1 since there is only n-1 steps between n points.
                1;
    return `bandspace(${cardinality}, ${extension_signalOrStringValue(paddingInner)}, ${extension_signalOrStringValue(paddingOuter)}) * ${scaleName}_step`;
}
//# sourceMappingURL=assemble.js.map
;// ../../node_modules/vega-lite/build/src/compile/layoutsize/component.js
function extension_getSizeTypeFromLayoutSizeType(layoutSizeType) {
    return layoutSizeType === 'childWidth' ? 'width' : layoutSizeType === 'childHeight' ? 'height' : layoutSizeType;
}
//# sourceMappingURL=component.js.map
;// ../../node_modules/vega-lite/build/src/compile/guide.js



function extension_guideEncodeEntry(encoding, model) {
    return extension_util_keys(encoding).reduce((encode, channel) => {
        return {
            ...encode,
            ...extension_wrapCondition({
                model,
                channelDef: encoding[channel],
                vgChannel: channel,
                mainRefFn: def => extension_signalOrValueRef(def.value),
                invalidValueRef: undefined // guide encoding won't show invalid values for the scale
            })
        };
    }, {});
}
//# sourceMappingURL=guide.js.map
;// ../../node_modules/vega-lite/build/src/compile/resolve.js



function extension_defaultScaleResolve(channel, model) {
    if (extension_isFacetModel(model)) {
        return channel === 'theta' ? 'independent' : 'shared';
    }
    else if (extension_isLayerModel(model)) {
        return 'shared';
    }
    else if (extension_isConcatModel(model)) {
        return extension_isXorY(channel) || channel === 'theta' || channel === 'radius' ? 'independent' : 'shared';
    }
    /* istanbul ignore next: should never reach here. */
    throw new Error('invalid model type for resolve');
}
function extension_parseGuideResolve(resolve, channel) {
    const channelScaleResolve = resolve.scale[channel];
    const guide = extension_isXorY(channel) ? 'axis' : 'legend';
    if (channelScaleResolve === 'independent') {
        if (resolve[guide][channel] === 'shared') {
            extension_log_warn(extension_independentScaleMeansIndependentGuide(channel));
        }
        return 'independent';
    }
    return resolve[guide][channel] || 'shared';
}
//# sourceMappingURL=resolve.js.map
;// ../../node_modules/vega-lite/build/src/compile/legend/component.js



const extension_LEGEND_COMPONENT_PROPERTY_INDEX = {
    ...extension_COMMON_LEGEND_PROPERTY_INDEX,
    disable: 1,
    labelExpr: 1,
    selections: 1,
    // channel scales
    opacity: 1,
    shape: 1,
    stroke: 1,
    fill: 1,
    size: 1,
    strokeWidth: 1,
    strokeDash: 1,
    // encode
    encode: 1
};
const extension_LEGEND_COMPONENT_PROPERTIES = extension_util_keys(extension_LEGEND_COMPONENT_PROPERTY_INDEX);
class extension_LegendComponent extends extension_Split {
}
//# sourceMappingURL=component.js.map
;// ../../node_modules/vega-lite/build/src/compile/legend/encode.js









const extension_legendEncodeRules = {
    symbols: extension_encode_symbols,
    gradient: extension_encode_gradient,
    labels: extension_labels,
    entries: extension_encode_entries
};
function extension_encode_symbols(symbolsSpec, { fieldOrDatumDef, model, channel, legendCmpt, legendType }) {
    if (legendType !== 'symbol') {
        return undefined;
    }
    const { markDef, encoding, config, mark } = model;
    const filled = markDef.filled && mark !== 'trail';
    let out = {
        ...extension_applyMarkConfig({}, model, extension_FILL_STROKE_CONFIG),
        ...extension_color_color(model, { filled })
    }; // FIXME: remove this when VgEncodeEntry is compatible with SymbolEncodeEntry
    const symbolOpacity = legendCmpt.get('symbolOpacity') ?? config.legend.symbolOpacity;
    const symbolFillColor = legendCmpt.get('symbolFillColor') ?? config.legend.symbolFillColor;
    const symbolStrokeColor = legendCmpt.get('symbolStrokeColor') ?? config.legend.symbolStrokeColor;
    const opacity = symbolOpacity === undefined ? (extension_getMaxValue(encoding.opacity) ?? markDef.opacity) : undefined;
    if (out.fill) {
        // for fill legend, we don't want any fill in symbol
        if (channel === 'fill' || (filled && channel === extension_COLOR)) {
            delete out.fill;
        }
        else if (extension_util_hasProperty(out.fill, 'field')) {
            // For others, set fill to some opaque value (or nothing if a color is already set)
            if (symbolFillColor) {
                delete out.fill;
            }
            else {
                out.fill = extension_signalOrValueRef(config.legend.symbolBaseFillColor ?? 'black');
                out.fillOpacity = extension_signalOrValueRef(opacity ?? 1);
            }
        }
        else if (extension_vega_util_module_isArray(out.fill)) {
            const fill = extension_getFirstConditionValue(encoding.fill ?? encoding.color) ?? markDef.fill ?? (filled && markDef.color);
            if (fill) {
                out.fill = extension_signalOrValueRef(fill);
            }
        }
    }
    if (out.stroke) {
        if (channel === 'stroke' || (!filled && channel === extension_COLOR)) {
            delete out.stroke;
        }
        else if (extension_util_hasProperty(out.stroke, 'field') || symbolStrokeColor) {
            // For others, remove stroke field
            delete out.stroke;
        }
        else if (extension_vega_util_module_isArray(out.stroke)) {
            const stroke = extension_getFirstDefined(extension_getFirstConditionValue(encoding.stroke || encoding.color), markDef.stroke, filled ? markDef.color : undefined);
            if (stroke) {
                out.stroke = { value: stroke };
            }
        }
    }
    if (channel !== extension_OPACITY) {
        const condition = extension_isFieldDef(fieldOrDatumDef) && extension_selectedCondition(model, legendCmpt, fieldOrDatumDef);
        if (condition) {
            out.opacity = [
                { test: condition, ...extension_signalOrValueRef(opacity ?? 1) },
                extension_signalOrValueRef(config.legend.unselectedOpacity)
            ];
        }
        else if (opacity) {
            out.opacity = extension_signalOrValueRef(opacity);
        }
    }
    out = { ...out, ...symbolsSpec };
    return extension_isEmpty(out) ? undefined : out;
}
function extension_encode_gradient(gradientSpec, { model, legendType, legendCmpt }) {
    if (legendType !== 'gradient') {
        return undefined;
    }
    const { config, markDef, encoding } = model;
    let out = {};
    const gradientOpacity = legendCmpt.get('gradientOpacity') ?? config.legend.gradientOpacity;
    const opacity = gradientOpacity === undefined ? extension_getMaxValue(encoding.opacity) || markDef.opacity : undefined;
    if (opacity) {
        // only apply opacity if it is neither zero or undefined
        out.opacity = extension_signalOrValueRef(opacity);
    }
    out = { ...out, ...gradientSpec };
    return extension_isEmpty(out) ? undefined : out;
}
function extension_labels(specifiedlabelsSpec, { fieldOrDatumDef, model, channel, legendCmpt }) {
    const legend = model.legend(channel) || {};
    const config = model.config;
    const condition = extension_isFieldDef(fieldOrDatumDef) ? extension_selectedCondition(model, legendCmpt, fieldOrDatumDef) : undefined;
    const opacity = condition ? [{ test: condition, value: 1 }, { value: config.legend.unselectedOpacity }] : undefined;
    const { format, formatType } = legend;
    let text = undefined;
    if (extension_isCustomFormatType(formatType)) {
        text = extension_formatCustomType({
            fieldOrDatumDef,
            field: 'datum.value',
            format,
            formatType,
            config
        });
    }
    else if (format === undefined && formatType === undefined && config.customFormatTypes) {
        if (fieldOrDatumDef.type === 'quantitative' && config.numberFormatType) {
            text = extension_formatCustomType({
                fieldOrDatumDef,
                field: 'datum.value',
                format: config.numberFormat,
                formatType: config.numberFormatType,
                config
            });
        }
        else if (fieldOrDatumDef.type === 'temporal' &&
            config.timeFormatType &&
            extension_isFieldDef(fieldOrDatumDef) &&
            fieldOrDatumDef.timeUnit === undefined) {
            text = extension_formatCustomType({
                fieldOrDatumDef,
                field: 'datum.value',
                format: config.timeFormat,
                formatType: config.timeFormatType,
                config
            });
        }
    }
    const labelsSpec = {
        ...(opacity ? { opacity } : {}),
        ...(text ? { text } : {}),
        ...specifiedlabelsSpec
    };
    return extension_isEmpty(labelsSpec) ? undefined : labelsSpec;
}
function extension_encode_entries(entriesSpec, { legendCmpt }) {
    const selections = legendCmpt.get('selections');
    return selections?.length ? { ...entriesSpec, fill: { value: 'transparent' } } : entriesSpec;
}
function extension_getMaxValue(channelDef) {
    return extension_getConditionValue(channelDef, (v, conditionalDef) => Math.max(v, conditionalDef.value));
}
function extension_getFirstConditionValue(channelDef) {
    return extension_getConditionValue(channelDef, (v, conditionalDef) => {
        return extension_getFirstDefined(v, conditionalDef.value);
    });
}
function extension_getConditionValue(channelDef, reducer) {
    if (extension_hasConditionalValueDef(channelDef)) {
        return extension_vega_util_module_array(channelDef.condition).reduce(reducer, channelDef.value);
    }
    else if (extension_isValueDef(channelDef)) {
        return channelDef.value;
    }
    return undefined;
}
function extension_selectedCondition(model, legendCmpt, fieldDef) {
    const selections = legendCmpt.get('selections');
    if (!selections?.length)
        return undefined;
    const field = extension_$(fieldDef.field);
    return selections
        .map(name => {
        const store = extension_$(extension_varName(name) + extension_STORE);
        return `(!length(data(${store})) || (${name}[${field}] && indexof(${name}[${field}], datum.value) >= 0))`;
    })
        .join(' || ');
}
//# sourceMappingURL=encode.js.map
;// ../../node_modules/vega-lite/build/src/compile/legend/properties.js








const extension_legendRules = {
    direction: ({ direction }) => direction,
    format: ({ fieldOrDatumDef, legend, config }) => {
        const { format, formatType } = legend;
        return extension_guideFormat(fieldOrDatumDef, fieldOrDatumDef.type, format, formatType, config, false);
    },
    formatType: ({ legend, fieldOrDatumDef, scaleType }) => {
        const { formatType } = legend;
        return extension_guideFormatType(formatType, fieldOrDatumDef, scaleType);
    },
    gradientLength: params => {
        const { legend, legendConfig } = params;
        return legend.gradientLength ?? legendConfig.gradientLength ?? extension_defaultGradientLength(params);
    },
    labelOverlap: ({ legend, legendConfig, scaleType }) => legend.labelOverlap ?? legendConfig.labelOverlap ?? extension_properties_defaultLabelOverlap(scaleType),
    symbolType: ({ legend, markDef, channel, encoding }) => legend.symbolType ?? extension_defaultSymbolType(markDef.type, channel, encoding.shape, markDef.shape),
    title: ({ fieldOrDatumDef, config }) => extension_channeldef_title(fieldOrDatumDef, config, { allowDisabling: true }),
    type: ({ legendType, scaleType, channel }) => {
        if (extension_isColorChannel(channel) && extension_isContinuousToContinuous(scaleType)) {
            if (legendType === 'gradient') {
                return undefined;
            }
        }
        else if (legendType === 'symbol') {
            return undefined;
        }
        return legendType;
    }, // depended by other property, let's define upfront
    values: ({ fieldOrDatumDef, legend }) => extension_legend_properties_values(legend, fieldOrDatumDef)
};
function extension_legend_properties_values(legend, fieldOrDatumDef) {
    const vals = legend.values;
    if (extension_vega_util_module_isArray(vals)) {
        return extension_valueArray(fieldOrDatumDef, vals);
    }
    else if (extension_isSignalRef(vals)) {
        return vals;
    }
    return undefined;
}
function extension_defaultSymbolType(mark, channel, shapeChannelDef, markShape) {
    if (channel !== 'shape') {
        // use the value from the shape encoding or the mark config if they exist
        const shape = extension_getFirstConditionValue(shapeChannelDef) ?? markShape;
        if (shape) {
            return shape;
        }
    }
    switch (mark) {
        case 'bar':
        case 'rect':
        case 'image':
        case 'square':
            return 'square';
        case 'line':
        case 'trail':
        case 'rule':
            return 'stroke';
        case 'arc':
        case 'point':
        case 'circle':
        case 'tick':
        case 'geoshape':
        case 'area':
        case 'text':
            return 'circle';
    }
}
function extension_clipHeight(legendType) {
    if (legendType === 'gradient') {
        return 20;
    }
    return undefined;
}
function extension_getLegendType(params) {
    const { legend } = params;
    return extension_getFirstDefined(legend.type, extension_properties_defaultType(params));
}
function extension_properties_defaultType({ channel, timeUnit, scaleType }) {
    // Following the logic in https://github.com/vega/vega-parser/blob/master/src/parsers/legend.js
    if (extension_isColorChannel(channel)) {
        if (extension_util_contains(['quarter', 'month', 'day'], timeUnit)) {
            return 'symbol';
        }
        if (extension_isContinuousToContinuous(scaleType)) {
            return 'gradient';
        }
    }
    return 'symbol';
}
function extension_getDirection({ legendConfig, legendType, orient, legend }) {
    return (legend.direction ??
        legendConfig[legendType ? 'gradientDirection' : 'symbolDirection'] ??
        extension_defaultDirection(orient, legendType));
}
function extension_defaultDirection(orient, legendType) {
    switch (orient) {
        case 'top':
        case 'bottom':
            return 'horizontal';
        case 'left':
        case 'right':
        case 'none':
        case undefined: // undefined = "right" in Vega
            return undefined; // vertical is Vega's default
        default:
            // top-left / ...
            // For inner legend, uses compact layout like Tableau
            return legendType === 'gradient' ? 'horizontal' : undefined;
    }
}
function extension_defaultGradientLength({ legendConfig, model, direction, orient, scaleType }) {
    const { gradientHorizontalMaxLength, gradientHorizontalMinLength, gradientVerticalMaxLength, gradientVerticalMinLength } = legendConfig;
    if (extension_isContinuousToContinuous(scaleType)) {
        if (direction === 'horizontal') {
            if (orient === 'top' || orient === 'bottom') {
                return extension_gradientLengthSignal(model, 'width', gradientHorizontalMinLength, gradientHorizontalMaxLength);
            }
            else {
                return gradientHorizontalMinLength;
            }
        }
        else {
            // vertical / undefined (Vega uses vertical by default)
            return extension_gradientLengthSignal(model, 'height', gradientVerticalMinLength, gradientVerticalMaxLength);
        }
    }
    return undefined;
}
function extension_gradientLengthSignal(model, sizeType, min, max) {
    const sizeSignal = model.getSizeSignalRef(sizeType).signal;
    return { signal: `clamp(${sizeSignal}, ${min}, ${max})` };
}
function extension_properties_defaultLabelOverlap(scaleType) {
    if (extension_util_contains(['quantile', 'threshold', 'log', 'symlog'], scaleType)) {
        return 'greedy';
    }
    return undefined;
}
//# sourceMappingURL=properties.js.map
;// ../../node_modules/vega-lite/build/src/compile/legend/parse.js















function extension_parse_parseLegend(model) {
    const legendComponent = extension_isUnitModel(model) ? extension_parseUnitLegend(model) : extension_parseNonUnitLegend(model);
    model.component.legends = legendComponent;
    return legendComponent;
}
function extension_parseUnitLegend(model) {
    const { encoding } = model;
    const legendComponent = {};
    for (const channel of [extension_COLOR, ...extension_LEGEND_SCALE_CHANNELS]) {
        const def = extension_getFieldOrDatumDef(encoding[channel]);
        if (!def || !model.getScaleComponent(channel)) {
            continue;
        }
        if (channel === extension_SHAPE && extension_isFieldDef(def) && def.type === extension_GEOJSON) {
            continue;
        }
        legendComponent[channel] = extension_parseLegendForChannel(model, channel);
    }
    return legendComponent;
}
function extension_getLegendDefWithScale(model, channel) {
    const scale = model.scaleName(channel);
    if (model.mark === 'trail') {
        if (channel === 'color') {
            // trail is a filled mark, but its default symbolType ("stroke") should use "stroke"
            return { stroke: scale };
        }
        else if (channel === 'size') {
            return { strokeWidth: scale };
        }
    }
    if (channel === 'color') {
        return model.markDef.filled ? { fill: scale } : { stroke: scale };
    }
    return { [channel]: scale };
}
// eslint-disable-next-line @typescript-eslint/ban-types
function extension_isExplicit(value, property, legend, fieldDef) {
    switch (property) {
        case 'disable':
            return legend !== undefined; // if axis is specified or null/false, then its enable/disable state is explicit
        case 'values':
            // specified legend.values is already respected, but may get transformed.
            return !!legend?.values;
        case 'title':
            // title can be explicit if fieldDef.title is set
            if (property === 'title' && value === fieldDef?.title) {
                return true;
            }
    }
    // Otherwise, things are explicit if the returned value matches the specified property
    return value === (legend || {})[property];
}
function extension_parseLegendForChannel(model, channel) {
    let legend = model.legend(channel);
    const { markDef, encoding, config } = model;
    const legendConfig = config.legend;
    const legendCmpt = new extension_LegendComponent({}, extension_getLegendDefWithScale(model, channel));
    extension_parseInteractiveLegend(model, channel, legendCmpt);
    const disable = legend !== undefined ? !legend : legendConfig.disable;
    legendCmpt.set('disable', disable, legend !== undefined);
    if (disable) {
        return legendCmpt;
    }
    legend = legend || {};
    const scaleType = model.getScaleComponent(channel).get('type');
    const fieldOrDatumDef = extension_getFieldOrDatumDef(encoding[channel]);
    const timeUnit = extension_isFieldDef(fieldOrDatumDef) ? extension_normalizeTimeUnit(fieldOrDatumDef.timeUnit)?.unit : undefined;
    const orient = legend.orient || config.legend.orient || 'right';
    const legendType = extension_getLegendType({ legend, channel, timeUnit, scaleType });
    const direction = extension_getDirection({ legend, legendType, orient, legendConfig });
    const ruleParams = {
        legend,
        channel,
        model,
        markDef,
        encoding,
        fieldOrDatumDef,
        legendConfig,
        config,
        scaleType,
        orient,
        legendType,
        direction
    };
    for (const property of extension_LEGEND_COMPONENT_PROPERTIES) {
        if ((legendType === 'gradient' && property.startsWith('symbol')) ||
            (legendType === 'symbol' && property.startsWith('gradient'))) {
            continue;
        }
        const value = property in extension_legendRules ? extension_legendRules[property](ruleParams) : legend[property];
        if (value !== undefined) {
            const explicit = extension_isExplicit(value, property, legend, model.fieldDef(channel));
            if (explicit || config.legend[property] === undefined) {
                legendCmpt.set(property, value, explicit);
            }
        }
    }
    const legendEncoding = legend?.encoding ?? {};
    const selections = legendCmpt.get('selections');
    const legendEncode = {};
    const legendEncodeParams = { fieldOrDatumDef, model, channel, legendCmpt, legendType };
    for (const part of ['labels', 'legend', 'title', 'symbols', 'gradient', 'entries']) {
        // FIXME: remove as any (figure out what legendEncoding.entries is)
        const legendEncodingPart = extension_guideEncodeEntry(legendEncoding[part] ?? {}, model);
        const value = part in extension_legendEncodeRules
            ? extension_legendEncodeRules[part](legendEncodingPart, legendEncodeParams) // apply rule
            : legendEncodingPart; // no rule -- just default values
        if (value !== undefined && !extension_isEmpty(value)) {
            legendEncode[part] = {
                ...(selections?.length && extension_isFieldDef(fieldOrDatumDef)
                    ? { name: `${extension_varName(fieldOrDatumDef.field)}_legend_${part}` }
                    : {}),
                ...(selections?.length ? { interactive: !!selections } : {}),
                update: value
            };
        }
    }
    if (!extension_isEmpty(legendEncode)) {
        legendCmpt.set('encode', legendEncode, !!legend?.encoding);
    }
    return legendCmpt;
}
function extension_parseNonUnitLegend(model) {
    const { legends, resolve } = model.component;
    for (const child of model.children) {
        extension_parse_parseLegend(child);
        for (const channel of extension_util_keys(child.component.legends)) {
            resolve.legend[channel] = extension_parseGuideResolve(model.component.resolve, channel);
            if (resolve.legend[channel] === 'shared') {
                // If the resolve says shared (and has not been overridden)
                // We will try to merge and see if there is a conflict
                legends[channel] = extension_mergeLegendComponent(legends[channel], child.component.legends[channel]);
                if (!legends[channel]) {
                    // If merge returns nothing, there is a conflict so we cannot make the legend shared.
                    // Thus, mark legend as independent and remove the legend component.
                    resolve.legend[channel] = 'independent';
                    delete legends[channel];
                }
            }
        }
    }
    for (const channel of extension_util_keys(legends)) {
        for (const child of model.children) {
            if (!child.component.legends[channel]) {
                // skip if the child does not have a particular legend
                continue;
            }
            if (resolve.legend[channel] === 'shared') {
                // After merging shared legend, make sure to remove legend from child
                delete child.component.legends[channel];
            }
        }
    }
    return legends;
}
function extension_mergeLegendComponent(mergedLegend, childLegend) {
    if (!mergedLegend) {
        return childLegend.clone();
    }
    const mergedOrient = mergedLegend.getWithExplicit('orient');
    const childOrient = childLegend.getWithExplicit('orient');
    if (mergedOrient.explicit && childOrient.explicit && mergedOrient.value !== childOrient.value) {
        // TODO: throw warning if resolve is explicit (We don't have info about explicit/implicit resolve yet.)
        // Cannot merge due to inconsistent orient
        return undefined;
    }
    let typeMerged = false;
    // Otherwise, let's merge
    for (const prop of extension_LEGEND_COMPONENT_PROPERTIES) {
        const mergedValueWithExplicit = extension_mergeValuesWithExplicit(mergedLegend.getWithExplicit(prop), childLegend.getWithExplicit(prop), prop, 'legend', 
        // Tie breaker function
        (v1, v2) => {
            switch (prop) {
                case 'symbolType':
                    return extension_mergeSymbolType(v1, v2);
                case 'title':
                    return extension_mergeTitleComponent(v1, v2);
                case 'type':
                    // There are only two types. If we have different types, then prefer symbol over gradient.
                    typeMerged = true;
                    return extension_makeImplicit('symbol');
            }
            return extension_defaultTieBreaker(v1, v2, prop, 'legend');
        });
        mergedLegend.setWithExplicit(prop, mergedValueWithExplicit);
    }
    if (typeMerged) {
        if (mergedLegend.implicit?.encode?.gradient) {
            extension_deleteNestedProperty(mergedLegend.implicit, ['encode', 'gradient']);
        }
        if (mergedLegend.explicit?.encode?.gradient) {
            extension_deleteNestedProperty(mergedLegend.explicit, ['encode', 'gradient']);
        }
    }
    return mergedLegend;
}
function extension_mergeSymbolType(st1, st2) {
    if (st2.value === 'circle') {
        // prefer "circle" over "stroke"
        return st2;
    }
    return st1;
}
//# sourceMappingURL=parse.js.map
;// ../../node_modules/vega-lite/build/src/compile/legend/assemble.js




function extension_setLegendEncode(legend, part, vgProp, vgRef) {
    var _a, _b;
    legend.encode ?? (legend.encode = {});
    (_a = legend.encode)[part] ?? (_a[part] = {});
    (_b = legend.encode[part]).update ?? (_b.update = {});
    // TODO: remove as any after https://github.com/prisma/nexus-prisma/issues/291
    legend.encode[part].update[vgProp] = vgRef;
}
function extension_assembleLegends(model) {
    const legendComponentIndex = model.component.legends;
    const legendByDomain = {};
    for (const channel of extension_util_keys(legendComponentIndex)) {
        const scaleComponent = model.getScaleComponent(channel);
        const domainHash = extension_util_stringify(scaleComponent.get('domains'));
        if (legendByDomain[domainHash]) {
            for (const mergedLegendComponent of legendByDomain[domainHash]) {
                const merged = extension_mergeLegendComponent(mergedLegendComponent, legendComponentIndex[channel]);
                if (!merged) {
                    // If cannot merge, need to add this legend separately
                    legendByDomain[domainHash].push(legendComponentIndex[channel]);
                }
            }
        }
        else {
            legendByDomain[domainHash] = [legendComponentIndex[channel].clone()];
        }
    }
    const legends = extension_vals(legendByDomain)
        .flat()
        .map(l => extension_assembleLegend(l, model.config))
        .filter(l => l !== undefined);
    return legends;
}
function extension_assembleLegend(legendCmpt, config) {
    const { disable, labelExpr, selections, ...legend } = legendCmpt.combine();
    if (disable) {
        return undefined;
    }
    if (config.aria === false && legend.aria == undefined) {
        legend.aria = false;
    }
    if (legend.encode?.symbols) {
        const out = legend.encode.symbols.update;
        if (out.fill && out.fill['value'] !== 'transparent' && !out.stroke && !legend.stroke) {
            // For non color channel's legend, we need to override symbol stroke config from Vega config if stroke channel is not used.
            out.stroke = { value: 'transparent' };
        }
        // Remove properties that the legend is encoding.
        for (const property of extension_LEGEND_SCALE_CHANNELS) {
            if (legend[property]) {
                delete out[property];
            }
        }
    }
    if (!legend.title) {
        // title schema doesn't include null, ''
        delete legend.title;
    }
    if (labelExpr !== undefined) {
        let expr = labelExpr;
        if (legend.encode?.labels?.update && extension_isSignalRef(legend.encode.labels.update.text)) {
            expr = extension_replaceAll(labelExpr, 'datum.label', legend.encode.labels.update.text.signal);
        }
        extension_setLegendEncode(legend, 'labels', 'text', { signal: expr });
    }
    return legend;
}
//# sourceMappingURL=assemble.js.map
;// ../../node_modules/vega-lite/build/src/compile/projection/assemble.js



function extension_assembleProjections(model) {
    if (extension_isLayerModel(model) || extension_isConcatModel(model)) {
        return extension_assembleProjectionsForModelAndChildren(model);
    }
    else {
        return extension_assembleProjectionForModel(model);
    }
}
function extension_assembleProjectionsForModelAndChildren(model) {
    return model.children.reduce((projections, child) => {
        return projections.concat(child.assembleProjections());
    }, extension_assembleProjectionForModel(model));
}
function extension_assembleProjectionForModel(model) {
    const component = model.component.projection;
    if (!component || component.merged) {
        return [];
    }
    const projection = component.combine();
    const { name } = projection; // we need to extract name so that it is always present in the output and pass TS type validation
    if (!component.data) {
        // generate custom projection, no automatic fitting
        return [
            {
                name,
                // translate to center by default
                translate: { signal: '[width / 2, height / 2]' },
                // parameters, overwrite default translate if specified
                ...projection
            }
        ];
    }
    else {
        // generate projection that uses extent fitting
        const size = {
            signal: `[${component.size.map(ref => ref.signal).join(', ')}]`
        };
        const fits = component.data.reduce((sources, data) => {
            const source = extension_isSignalRef(data) ? data.signal : `data('${model.lookupDataSource(data)}')`;
            if (!extension_util_contains(sources, source)) {
                // build a unique list of sources
                sources.push(source);
            }
            return sources;
        }, []);
        if (fits.length <= 0) {
            throw new Error("Projection's fit didn't find any data sources");
        }
        return [
            {
                name,
                size,
                fit: {
                    signal: fits.length > 1 ? `[${fits.join(', ')}]` : fits[0]
                },
                ...projection
            }
        ];
    }
}
//# sourceMappingURL=assemble.js.map
;// ../../node_modules/vega-lite/build/src/projection.js
const extension_PROJECTION_PROPERTIES = [
    'type',
    'clipAngle',
    'clipExtent',
    'center',
    'rotate',
    'precision',
    'reflectX',
    'reflectY',
    'coefficient',
    'distance',
    'fraction',
    'lobes',
    'parallel',
    'radius',
    'ratio',
    'spacing',
    'tilt'
];
//# sourceMappingURL=projection.js.map
;// ../../node_modules/vega-lite/build/src/compile/projection/component.js

class extension_ProjectionComponent extends extension_Split {
    constructor(name, specifiedProjection, size, data) {
        super({ ...specifiedProjection }, // all explicit properties of projection
        { name } // name as initial implicit property
        );
        this.specifiedProjection = specifiedProjection;
        this.size = size;
        this.data = data;
        this.merged = false;
    }
    /**
     * Whether the projection parameters should fit provided data.
     */
    get isFit() {
        return !!this.data;
    }
}
//# sourceMappingURL=component.js.map
;// ../../node_modules/vega-lite/build/src/compile/projection/parse.js










function extension_parse_parseProjection(model) {
    model.component.projection = extension_isUnitModel(model) ? extension_parseUnitProjection(model) : extension_parseNonUnitProjections(model);
}
function extension_parseUnitProjection(model) {
    if (model.hasProjection) {
        const proj = extension_replaceExprRef(model.specifiedProjection);
        const fit = !(proj && (proj.scale != null || proj.translate != null));
        const size = fit ? [model.getSizeSignalRef('width'), model.getSizeSignalRef('height')] : undefined;
        const data = fit ? extension_gatherFitData(model) : undefined;
        const projComp = new extension_ProjectionComponent(model.projectionName(true), {
            ...extension_replaceExprRef(model.config.projection),
            ...proj
        }, size, data);
        if (!projComp.get('type')) {
            projComp.set('type', 'equalEarth', false);
        }
        return projComp;
    }
    return undefined;
}
function extension_gatherFitData(model) {
    const data = [];
    const { encoding } = model;
    for (const posssiblePair of [
        [extension_LONGITUDE, extension_LATITUDE],
        [extension_LONGITUDE2, extension_LATITUDE2]
    ]) {
        if (extension_getFieldOrDatumDef(encoding[posssiblePair[0]]) || extension_getFieldOrDatumDef(encoding[posssiblePair[1]])) {
            data.push({
                signal: model.getName(`geojson_${data.length}`)
            });
        }
    }
    if (model.channelHasField(extension_SHAPE) && model.typedFieldDef(extension_SHAPE).type === extension_GEOJSON) {
        data.push({
            signal: model.getName(`geojson_${data.length}`)
        });
    }
    if (data.length === 0) {
        // main source is geojson, so we can just use that
        data.push(model.requestDataName(extension_DataSourceType.Main));
    }
    return data;
}
function extension_mergeIfNoConflict(first, second) {
    const allPropertiesShared = extension_every(extension_PROJECTION_PROPERTIES, prop => {
        // neither has the property
        if (!extension_vega_util_module_has(first.explicit, prop) && !extension_vega_util_module_has(second.explicit, prop)) {
            return true;
        }
        // both have property and an equal value for property
        if (extension_vega_util_module_has(first.explicit, prop) &&
            extension_vega_util_module_has(second.explicit, prop) &&
            // some properties might be signals or objects and require hashing for comparison
            extension_util_deepEqual(first.get(prop), second.get(prop))) {
            return true;
        }
        return false;
    });
    const size = extension_util_deepEqual(first.size, second.size);
    if (size) {
        if (allPropertiesShared) {
            return first;
        }
        else if (extension_util_deepEqual(first.explicit, {})) {
            return second;
        }
        else if (extension_util_deepEqual(second.explicit, {})) {
            return first;
        }
    }
    // if all properties don't match, let each unit spec have its own projection
    return null;
}
function extension_parseNonUnitProjections(model) {
    if (model.children.length === 0) {
        return undefined;
    }
    let nonUnitProjection;
    // parse all children first
    for (const child of model.children) {
        extension_parse_parseProjection(child);
    }
    // analyze parsed projections, attempt to merge
    const mergable = extension_every(model.children, child => {
        const projection = child.component.projection;
        if (!projection) {
            // child layer does not use a projection
            return true;
        }
        else if (!nonUnitProjection) {
            // cached 'projection' is null, cache this one
            nonUnitProjection = projection;
            return true;
        }
        else {
            const merge = extension_mergeIfNoConflict(nonUnitProjection, projection);
            if (merge) {
                nonUnitProjection = merge;
            }
            return !!merge;
        }
    });
    // if cached one and all other children share the same projection,
    if (nonUnitProjection && mergable) {
        // so we can elevate it to the layer level
        const name = model.projectionName(true);
        const modelProjection = new extension_ProjectionComponent(name, nonUnitProjection.specifiedProjection, nonUnitProjection.size, extension_duplicate(nonUnitProjection.data));
        // rename and assign all others as merged
        for (const child of model.children) {
            const projection = child.component.projection;
            if (projection) {
                if (projection.isFit) {
                    modelProjection.data.push(...child.component.projection.data);
                }
                child.renameProjection(projection.get('name'), name);
                projection.merged = true;
            }
        }
        return modelProjection;
    }
    return undefined;
}
//# sourceMappingURL=parse.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/bin.js








function extension_rangeFormula(model, fieldDef, channel, config) {
    if (extension_binRequiresRange(fieldDef, channel)) {
        // read format from axis or legend, if there is no format then use config.numberFormat
        const guide = extension_isUnitModel(model)
            ? (model.axis(channel) ?? model.legend(channel) ?? {})
            : {};
        const startField = extension_vgField(fieldDef, { expr: 'datum' });
        const endField = extension_vgField(fieldDef, { expr: 'datum', binSuffix: 'end' });
        return {
            formulaAs: extension_vgField(fieldDef, { binSuffix: 'range', forAs: true }),
            formula: extension_binFormatExpression(startField, endField, guide.format, guide.formatType, config)
        };
    }
    return {};
}
function extension_binKey(bin, field) {
    return `${extension_binToString(bin)}_${field}`;
}
function extension_getSignalsFromModel(model, key) {
    return {
        signal: model.getName(`${key}_bins`),
        extentSignal: model.getName(`${key}_extent`)
    };
}
function extension_getBinSignalName(model, field, bin) {
    const normalizedBin = extension_normalizeBin(bin, undefined) ?? {};
    const key = extension_binKey(normalizedBin, field);
    return model.getName(`${key}_bins`);
}
function extension_isBinTransform(t) {
    return 'as' in t;
}
function extension_createBinComponent(t, bin, model) {
    let as;
    let span;
    if (extension_isBinTransform(t)) {
        as = extension_vega_util_module_isString(t.as) ? [t.as, `${t.as}_end`] : [t.as[0], t.as[1]];
    }
    else {
        as = [extension_vgField(t, { forAs: true }), extension_vgField(t, { binSuffix: 'end', forAs: true })];
    }
    const normalizedBin = { ...extension_normalizeBin(bin, undefined) };
    const key = extension_binKey(normalizedBin, t.field);
    const { signal, extentSignal } = extension_getSignalsFromModel(model, key);
    if (extension_isParameterExtent(normalizedBin.extent)) {
        const ext = normalizedBin.extent;
        span = extension_parseSelectionExtent(model, ext.param, ext);
        delete normalizedBin.extent; // Vega-Lite selection extent map to Vega's span property.
    }
    const binComponent = {
        bin: normalizedBin,
        field: t.field,
        as: [as],
        ...(signal ? { signal } : {}),
        ...(extentSignal ? { extentSignal } : {}),
        ...(span ? { span } : {})
    };
    return { key, binComponent };
}
class extension_BinNode extends extension_DataFlowNode {
    clone() {
        return new extension_BinNode(null, extension_duplicate(this.bins));
    }
    constructor(parent, bins) {
        super(parent);
        this.bins = bins;
    }
    static makeFromEncoding(parent, model) {
        const bins = model.reduceFieldDef((binComponentIndex, fieldDef, channel) => {
            if (extension_isTypedFieldDef(fieldDef) && extension_isBinning(fieldDef.bin)) {
                const { key, binComponent } = extension_createBinComponent(fieldDef, fieldDef.bin, model);
                binComponentIndex[key] = {
                    ...binComponent,
                    ...binComponentIndex[key],
                    ...extension_rangeFormula(model, fieldDef, channel, model.config)
                };
            }
            return binComponentIndex;
        }, {});
        if (extension_isEmpty(bins)) {
            return null;
        }
        return new extension_BinNode(parent, bins);
    }
    /**
     * Creates a bin node from BinTransform.
     * The optional parameter should provide
     */
    static makeFromTransform(parent, t, model) {
        const { key, binComponent } = extension_createBinComponent(t, t.bin, model);
        return new extension_BinNode(parent, {
            [key]: binComponent
        });
    }
    /**
     * Merge bin nodes. This method either integrates the bin config from the other node
     * or if this node already has a bin config, renames the corresponding signal in the model.
     */
    merge(other, renameSignal) {
        for (const key of extension_util_keys(other.bins)) {
            if (key in this.bins) {
                renameSignal(other.bins[key].signal, this.bins[key].signal);
                // Ensure that we don't have duplicate names for signal pairs
                this.bins[key].as = extension_unique([...this.bins[key].as, ...other.bins[key].as], extension_util_hash);
            }
            else {
                this.bins[key] = other.bins[key];
            }
        }
        for (const child of other.children) {
            other.removeChild(child);
            child.parent = this;
        }
        other.remove();
    }
    producedFields() {
        return new Set(extension_vals(this.bins)
            .map(c => c.as)
            .flat(2));
    }
    dependentFields() {
        return new Set(extension_vals(this.bins).map(c => c.field));
    }
    hash() {
        return `Bin ${extension_util_hash(this.bins)}`;
    }
    assemble() {
        return extension_vals(this.bins).flatMap(bin => {
            const transform = [];
            const [binAs, ...remainingAs] = bin.as;
            const { extent, ...params } = bin.bin;
            const binTrans = {
                type: 'bin',
                field: extension_replacePathInField(bin.field),
                as: binAs,
                signal: bin.signal,
                ...(!extension_isParameterExtent(extent) ? { extent } : { extent: null }),
                ...(bin.span ? { span: { signal: `span(${bin.span})` } } : {}),
                ...params
            };
            if (!extent && bin.extentSignal) {
                transform.push({
                    type: 'extent',
                    field: extension_replacePathInField(bin.field),
                    signal: bin.extentSignal
                });
                binTrans.extent = { signal: bin.extentSignal };
            }
            transform.push(binTrans);
            for (const as of remainingAs) {
                for (let i = 0; i < 2; i++) {
                    transform.push({
                        type: 'formula',
                        expr: extension_vgField({ field: binAs[i] }, { expr: 'datum' }),
                        as: as[i]
                    });
                }
            }
            if (bin.formula) {
                transform.push({
                    type: 'formula',
                    expr: bin.formula,
                    as: bin.formulaAs
                });
            }
            return transform;
        });
    }
}
//# sourceMappingURL=bin.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/aggregate.js










function extension_addDimension(dims, channel, fieldDef, model) {
    const channelDef2 = extension_isUnitModel(model) ? model.encoding[extension_getSecondaryRangeChannel(channel)] : undefined;
    if (extension_isTypedFieldDef(fieldDef) &&
        extension_isUnitModel(model) &&
        extension_hasBandEnd(fieldDef, channelDef2, model.markDef, model.config)) {
        dims.add(extension_vgField(fieldDef, {}));
        dims.add(extension_vgField(fieldDef, { suffix: 'end' }));
        const { mark, markDef, config } = model;
        const bandPosition = extension_getBandPosition({ fieldDef, markDef, config });
        if (extension_isRectBasedMark(mark) && bandPosition !== 0.5 && extension_isXorY(channel)) {
            dims.add(extension_vgField(fieldDef, { suffix: extension_OFFSETTED_RECT_START_SUFFIX }));
            dims.add(extension_vgField(fieldDef, { suffix: extension_OFFSETTED_RECT_END_SUFFIX }));
        }
        if (fieldDef.bin && extension_binRequiresRange(fieldDef, channel)) {
            dims.add(extension_vgField(fieldDef, { binSuffix: 'range' }));
        }
    }
    else if (extension_isGeoPositionChannel(channel)) {
        const posChannel = extension_getPositionChannelFromLatLong(channel);
        dims.add(model.getName(posChannel));
    }
    else {
        dims.add(extension_vgField(fieldDef));
    }
    if (extension_isScaleFieldDef(fieldDef) && extension_isFieldRange(fieldDef.scale?.range)) {
        dims.add(fieldDef.scale.range.field);
    }
    return dims;
}
function extension_mergeMeasures(parentMeasures, childMeasures) {
    for (const field of extension_util_keys(childMeasures)) {
        // when we merge a measure, we either have to add an aggregation operator or even a new field
        const ops = childMeasures[field];
        for (const op of extension_util_keys(ops)) {
            if (field in parentMeasures) {
                // add operator to existing measure field
                parentMeasures[field][op] = new Set([...(parentMeasures[field][op] ?? []), ...ops[op]]);
            }
            else {
                parentMeasures[field] = { [op]: ops[op] };
            }
        }
    }
}
class extension_AggregateNode extends extension_DataFlowNode {
    clone() {
        return new extension_AggregateNode(null, new Set(this.dimensions), extension_duplicate(this.measures));
    }
    /**
     * @param dimensions string set for dimensions
     * @param measures dictionary mapping field name => dict of aggregation functions and names to use
     */
    constructor(parent, dimensions, measures) {
        super(parent);
        this.dimensions = dimensions;
        this.measures = measures;
    }
    get groupBy() {
        return this.dimensions;
    }
    static makeFromEncoding(parent, model) {
        let isAggregate = false;
        model.forEachFieldDef(fd => {
            if (fd.aggregate) {
                isAggregate = true;
            }
        });
        const meas = {};
        const dims = new Set();
        if (!isAggregate) {
            // no need to create this node if the model has no aggregation
            return null;
        }
        model.forEachFieldDef((fieldDef, channel) => {
            const { aggregate, field } = fieldDef;
            if (aggregate) {
                if (aggregate === 'count') {
                    meas['*'] ?? (meas['*'] = {});
                    meas['*']['count'] = new Set([extension_vgField(fieldDef, { forAs: true })]);
                }
                else {
                    if (extension_isArgminDef(aggregate) || extension_isArgmaxDef(aggregate)) {
                        const op = extension_isArgminDef(aggregate) ? 'argmin' : 'argmax';
                        const argField = aggregate[op];
                        meas[argField] ?? (meas[argField] = {});
                        meas[argField][op] = new Set([extension_vgField({ op, field: argField }, { forAs: true })]);
                    }
                    else {
                        meas[field] ?? (meas[field] = {});
                        meas[field][aggregate] = new Set([extension_vgField(fieldDef, { forAs: true })]);
                    }
                    // For scale channel with domain === 'unaggregated', add min/max so we can use their union as unaggregated domain
                    if (extension_isScaleChannel(channel) && model.scaleDomain(channel) === 'unaggregated') {
                        meas[field] ?? (meas[field] = {});
                        meas[field]['min'] = new Set([extension_vgField({ field, aggregate: 'min' }, { forAs: true })]);
                        meas[field]['max'] = new Set([extension_vgField({ field, aggregate: 'max' }, { forAs: true })]);
                    }
                }
            }
            else {
                extension_addDimension(dims, channel, fieldDef, model);
            }
        });
        if (dims.size + extension_util_keys(meas).length === 0) {
            return null;
        }
        return new extension_AggregateNode(parent, dims, meas);
    }
    static makeFromTransform(parent, t) {
        var _a;
        const dims = new Set();
        const meas = {};
        for (const s of t.aggregate) {
            const { op, field, as } = s;
            if (op) {
                if (op === 'count') {
                    meas['*'] ?? (meas['*'] = {});
                    meas['*']['count'] = new Set([as ? as : extension_vgField(s, { forAs: true })]);
                }
                else {
                    meas[field] ?? (meas[field] = {});
                    (_a = meas[field])[op] ?? (_a[op] = new Set());
                    meas[field][op].add(as ? as : extension_vgField(s, { forAs: true }));
                }
            }
        }
        for (const s of t.groupby ?? []) {
            dims.add(s);
        }
        if (dims.size + extension_util_keys(meas).length === 0) {
            return null;
        }
        return new extension_AggregateNode(parent, dims, meas);
    }
    merge(other) {
        if (extension_setEqual(this.dimensions, other.dimensions)) {
            extension_mergeMeasures(this.measures, other.measures);
            return true;
        }
        extension_log_debug('different dimensions, cannot merge');
        return false;
    }
    addDimensions(fields) {
        fields.forEach(this.dimensions.add, this.dimensions);
    }
    dependentFields() {
        return new Set([...this.dimensions, ...extension_util_keys(this.measures)]);
    }
    producedFields() {
        const out = new Set();
        for (const field of extension_util_keys(this.measures)) {
            for (const op of extension_util_keys(this.measures[field])) {
                const m = this.measures[field][op];
                if (m.size === 0) {
                    out.add(`${op}_${field}`);
                }
                else {
                    m.forEach(out.add, out);
                }
            }
        }
        return out;
    }
    hash() {
        return `Aggregate ${extension_util_hash({ dimensions: this.dimensions, measures: this.measures })}`;
    }
    assemble() {
        const ops = [];
        const fields = [];
        const as = [];
        for (const field of extension_util_keys(this.measures)) {
            for (const op of extension_util_keys(this.measures[field])) {
                for (const alias of this.measures[field][op]) {
                    as.push(alias);
                    ops.push(op);
                    fields.push(field === '*' ? null : extension_replacePathInField(field));
                }
            }
        }
        const result = {
            type: 'aggregate',
            groupby: [...this.dimensions].map(extension_replacePathInField),
            ops,
            fields,
            as
        };
        return result;
    }
}
//# sourceMappingURL=aggregate.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/facet.js













/**
 * A node that helps us track what fields we are faceting by.
 */
class extension_FacetNode extends extension_DataFlowNode {
    /**
     * @param model The facet model.
     * @param name The name that this facet source will have.
     * @param data The source data for this facet data.
     */
    constructor(parent, model, name, data) {
        super(parent);
        this.model = model;
        this.name = name;
        this.data = data;
        for (const channel of extension_FACET_CHANNELS) {
            const fieldDef = model.facet[channel];
            if (fieldDef) {
                const { bin, sort } = fieldDef;
                this[channel] = {
                    name: model.getName(`${channel}_domain`),
                    fields: [extension_vgField(fieldDef), ...(extension_isBinning(bin) ? [extension_vgField(fieldDef, { binSuffix: 'end' })] : [])],
                    ...(extension_isSortField(sort)
                        ? { sortField: sort }
                        : extension_vega_util_module_isArray(sort)
                            ? { sortIndexField: extension_sortArrayIndexField(fieldDef, channel) }
                            : {})
                };
            }
        }
        this.childModel = model.child;
    }
    hash() {
        let out = `Facet`;
        for (const channel of extension_FACET_CHANNELS) {
            if (this[channel]) {
                out += ` ${channel.charAt(0)}:${extension_util_hash(this[channel])}`;
            }
        }
        return out;
    }
    get fields() {
        const f = [];
        for (const channel of extension_FACET_CHANNELS) {
            if (this[channel]?.fields) {
                f.push(...this[channel].fields);
            }
        }
        return f;
    }
    dependentFields() {
        const depFields = new Set(this.fields);
        for (const channel of extension_FACET_CHANNELS) {
            if (this[channel]) {
                if (this[channel].sortField) {
                    depFields.add(this[channel].sortField.field);
                }
                if (this[channel].sortIndexField) {
                    depFields.add(this[channel].sortIndexField);
                }
            }
        }
        return depFields;
    }
    producedFields() {
        return new Set(); // facet does not produce any new fields
    }
    /**
     * The name to reference this source is its name.
     */
    getSource() {
        return this.name;
    }
    getChildIndependentFieldsWithStep() {
        const childIndependentFieldsWithStep = {};
        for (const channel of extension_POSITION_SCALE_CHANNELS) {
            const childScaleComponent = this.childModel.component.scales[channel];
            if (childScaleComponent && !childScaleComponent.merged) {
                // independent scale
                const type = childScaleComponent.get('type');
                const range = childScaleComponent.get('range');
                if (extension_hasDiscreteDomain(type) && extension_isVgRangeStep(range)) {
                    const domain = extension_assembleDomain(this.childModel, channel);
                    const field = extension_getFieldFromDomain(domain);
                    if (field) {
                        childIndependentFieldsWithStep[channel] = field;
                    }
                    else {
                        extension_log_warn(extension_unknownField(channel));
                    }
                }
            }
        }
        return childIndependentFieldsWithStep;
    }
    assembleRowColumnHeaderData(channel, crossedDataName, childIndependentFieldsWithStep) {
        const childChannel = { row: 'y', column: 'x', facet: undefined }[channel];
        const fields = [];
        const ops = [];
        const as = [];
        if (childChannel && childIndependentFieldsWithStep && childIndependentFieldsWithStep[childChannel]) {
            if (crossedDataName) {
                // If there is a crossed data, calculate max
                fields.push(`distinct_${childIndependentFieldsWithStep[childChannel]}`);
                ops.push('max');
            }
            else {
                // If there is no crossed data, just calculate distinct
                fields.push(childIndependentFieldsWithStep[childChannel]);
                ops.push('distinct');
            }
            // Although it is technically a max, just name it distinct so it's easier to refer to it
            as.push(`distinct_${childIndependentFieldsWithStep[childChannel]}`);
        }
        const { sortField, sortIndexField } = this[channel];
        if (sortField) {
            const { op = extension_DEFAULT_SORT_OP, field } = sortField;
            fields.push(field);
            ops.push(op);
            as.push(extension_vgField(sortField, { forAs: true }));
        }
        else if (sortIndexField) {
            fields.push(sortIndexField);
            ops.push('max');
            as.push(sortIndexField);
        }
        return {
            name: this[channel].name,
            // Use data from the crossed one if it exist
            source: crossedDataName ?? this.data,
            transform: [
                {
                    type: 'aggregate',
                    groupby: this[channel].fields,
                    ...(fields.length
                        ? {
                            fields,
                            ops,
                            as
                        }
                        : {})
                }
            ]
        };
    }
    assembleFacetHeaderData(childIndependentFieldsWithStep) {
        const { columns } = this.model.layout;
        const { layoutHeaders } = this.model.component;
        const data = [];
        const hasSharedAxis = {};
        for (const headerChannel of extension_HEADER_CHANNELS) {
            for (const headerType of extension_HEADER_TYPES) {
                const headers = (layoutHeaders[headerChannel] && layoutHeaders[headerChannel][headerType]) ?? [];
                for (const header of headers) {
                    if (header.axes?.length > 0) {
                        hasSharedAxis[headerChannel] = true;
                        break;
                    }
                }
            }
            if (hasSharedAxis[headerChannel]) {
                const cardinality = `length(data("${this.facet.name}"))`;
                const stop = headerChannel === 'row'
                    ? columns
                        ? { signal: `ceil(${cardinality} / ${columns})` }
                        : 1
                    : columns
                        ? { signal: `min(${cardinality}, ${columns})` }
                        : { signal: cardinality };
                data.push({
                    name: `${this.facet.name}_${headerChannel}`,
                    transform: [
                        {
                            type: 'sequence',
                            start: 0,
                            stop
                        }
                    ]
                });
            }
        }
        const { row, column } = hasSharedAxis;
        if (row || column) {
            data.unshift(this.assembleRowColumnHeaderData('facet', null, childIndependentFieldsWithStep));
        }
        return data;
    }
    assemble() {
        const data = [];
        let crossedDataName = null;
        const childIndependentFieldsWithStep = this.getChildIndependentFieldsWithStep();
        const { column, row, facet } = this;
        if (column && row && (childIndependentFieldsWithStep.x || childIndependentFieldsWithStep.y)) {
            // Need to create a cross dataset to correctly calculate cardinality
            crossedDataName = `cross_${this.column.name}_${this.row.name}`;
            const fields = [].concat(childIndependentFieldsWithStep.x ?? [], childIndependentFieldsWithStep.y ?? []);
            const ops = fields.map(() => 'distinct');
            data.push({
                name: crossedDataName,
                source: this.data,
                transform: [
                    {
                        type: 'aggregate',
                        groupby: this.fields,
                        fields,
                        ops
                    }
                ]
            });
        }
        for (const channel of [extension_COLUMN, extension_ROW]) {
            if (this[channel]) {
                data.push(this.assembleRowColumnHeaderData(channel, crossedDataName, childIndependentFieldsWithStep));
            }
        }
        if (facet) {
            const facetData = this.assembleFacetHeaderData(childIndependentFieldsWithStep);
            if (facetData) {
                data.push(...facetData);
            }
        }
        return data;
    }
}
//# sourceMappingURL=facet.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/formatparse.js
















/**
 * Remove quotes from a string.
 */
function extension_unquote(pattern) {
    if ((pattern.startsWith("'") && pattern.endsWith("'")) || (pattern.startsWith('"') && pattern.endsWith('"'))) {
        return pattern.slice(1, -1);
    }
    return pattern;
}
/**
 * @param field The field.
 * @param parse What to parse the field as.
 */
function extension_formatparse_parseExpression(field, parse) {
    const f = extension_accessPathWithDatum(field);
    if (parse === 'number') {
        return `toNumber(${f})`;
    }
    else if (parse === 'boolean') {
        return `toBoolean(${f})`;
    }
    else if (parse === 'string') {
        return `toString(${f})`;
    }
    else if (parse === 'date') {
        return `toDate(${f})`;
    }
    else if (parse === 'flatten') {
        return f;
    }
    else if (parse.startsWith('date:')) {
        const specifier = extension_unquote(parse.slice(5, parse.length));
        return `timeParse(${f},'${specifier}')`;
    }
    else if (parse.startsWith('utc:')) {
        const specifier = extension_unquote(parse.slice(4, parse.length));
        return `utcParse(${f},'${specifier}')`;
    }
    else {
        extension_log_warn(extension_unrecognizedParse(parse));
        return null;
    }
}
function extension_getImplicitFromFilterTransform(transform) {
    const implicit = {};
    extension_forEachLeaf(transform.filter, filter => {
        if (extension_isFieldPredicate(filter)) {
            // Automatically add a parse node for filters with filter objects
            let val = null;
            // For EqualFilter, just use the equal property.
            // For RangeFilter and OneOfFilter, all array members should have
            // the same type, so we only use the first one.
            if (extension_isFieldEqualPredicate(filter)) {
                val = extension_signalRefOrValue(filter.equal);
            }
            else if (extension_isFieldLTEPredicate(filter)) {
                val = extension_signalRefOrValue(filter.lte);
            }
            else if (extension_isFieldLTPredicate(filter)) {
                val = extension_signalRefOrValue(filter.lt);
            }
            else if (extension_isFieldGTPredicate(filter)) {
                val = extension_signalRefOrValue(filter.gt);
            }
            else if (extension_isFieldGTEPredicate(filter)) {
                val = extension_signalRefOrValue(filter.gte);
            }
            else if (extension_isFieldRangePredicate(filter)) {
                // FIXME: remove as any
                val = filter.range[0];
            }
            else if (extension_isFieldOneOfPredicate(filter)) {
                val = (filter.oneOf ?? filter.in)[0];
            } // else -- for filter expression, we can't infer anything
            if (val) {
                if (extension_isDateTime(val)) {
                    implicit[filter.field] = 'date';
                }
                else if (extension_vega_util_module_isNumber(val)) {
                    implicit[filter.field] = 'number';
                }
                else if (extension_vega_util_module_isString(val)) {
                    implicit[filter.field] = 'string';
                }
            }
            if (filter.timeUnit) {
                implicit[filter.field] = 'date';
            }
        }
    });
    return implicit;
}
/**
 * Creates a parse node for implicit parsing from a model and updates ancestorParse.
 */
function extension_getImplicitFromEncoding(model) {
    const implicit = {};
    function add(fieldDef) {
        if (extension_isFieldOrDatumDefForTimeFormat(fieldDef)) {
            implicit[fieldDef.field] = 'date';
        }
        else if (fieldDef.type === 'quantitative' &&
            extension_isMinMaxOp(fieldDef.aggregate) // we need to parse numbers to support correct min and max
        ) {
            implicit[fieldDef.field] = 'number';
        }
        else if (extension_accessPathDepth(fieldDef.field) > 1) {
            // For non-date/non-number (strings and booleans), derive a flattened field for a referenced nested field.
            // (Parsing numbers / dates already flattens numeric and temporal fields.)
            if (!(fieldDef.field in implicit)) {
                implicit[fieldDef.field] = 'flatten';
            }
        }
        else if (extension_isScaleFieldDef(fieldDef) && extension_isSortField(fieldDef.sort) && extension_accessPathDepth(fieldDef.sort.field) > 1) {
            // Flatten fields that we sort by but that are not otherwise flattened.
            if (!(fieldDef.sort.field in implicit)) {
                implicit[fieldDef.sort.field] = 'flatten';
            }
        }
    }
    if (extension_isUnitModel(model) || extension_isFacetModel(model)) {
        // Parse encoded fields
        model.forEachFieldDef((fieldDef, channel) => {
            if (extension_isTypedFieldDef(fieldDef)) {
                add(fieldDef);
            }
            else {
                const mainChannel = extension_getMainRangeChannel(channel);
                const mainFieldDef = model.fieldDef(mainChannel);
                add({
                    ...fieldDef,
                    type: mainFieldDef.type
                });
            }
        });
    }
    // Parse quantitative dimension fields of path marks as numbers so that we sort them correctly.
    if (extension_isUnitModel(model)) {
        const { mark, markDef, encoding } = model;
        if (extension_isPathMark(mark) &&
            // No need to sort by dimension if we have a connected scatterplot (order channel is present)
            !model.encoding.order) {
            const dimensionChannel = markDef.orient === 'horizontal' ? 'y' : 'x';
            const dimensionChannelDef = encoding[dimensionChannel];
            if (extension_isFieldDef(dimensionChannelDef) &&
                dimensionChannelDef.type === 'quantitative' &&
                !(dimensionChannelDef.field in implicit)) {
                implicit[dimensionChannelDef.field] = 'number';
            }
        }
    }
    return implicit;
}
/**
 * Creates a parse node for implicit parsing from a model and updates ancestorParse.
 */
function extension_getImplicitFromSelection(model) {
    const implicit = {};
    if (extension_isUnitModel(model) && model.component.selection) {
        for (const name of extension_util_keys(model.component.selection)) {
            const selCmpt = model.component.selection[name];
            for (const proj of selCmpt.project.items) {
                if (!proj.channel && extension_accessPathDepth(proj.field) > 1) {
                    implicit[proj.field] = 'flatten';
                }
            }
        }
    }
    return implicit;
}
class extension_ParseNode extends extension_DataFlowNode {
    clone() {
        return new extension_ParseNode(null, extension_duplicate(this._parse));
    }
    constructor(parent, parse) {
        super(parent);
        this._parse = parse;
    }
    hash() {
        return `Parse ${extension_util_hash(this._parse)}`;
    }
    /**
     * Creates a parse node from a data.format.parse and updates ancestorParse.
     */
    static makeExplicit(parent, model, ancestorParse) {
        // Custom parse
        let explicit = {};
        const data = model.data;
        if (!extension_isGenerator(data) && data?.format?.parse) {
            explicit = data.format.parse;
        }
        return this.makeWithAncestors(parent, explicit, {}, ancestorParse);
    }
    /**
     * Creates a parse node from "explicit" parse and "implicit" parse and updates ancestorParse.
     */
    static makeWithAncestors(parent, explicit, implicit, ancestorParse) {
        // We should not parse what has already been parsed in a parent (explicitly or implicitly) or what has been derived (maked as "derived"). We also don't need to flatten a field that has already been parsed.
        for (const field of extension_util_keys(implicit)) {
            const parsedAs = ancestorParse.getWithExplicit(field);
            if (parsedAs.value !== undefined) {
                // We always ignore derived fields even if they are implicitly defined because we expect users to create the right types.
                if (parsedAs.explicit ||
                    parsedAs.value === implicit[field] ||
                    parsedAs.value === 'derived' ||
                    implicit[field] === 'flatten') {
                    delete implicit[field];
                }
                else {
                    extension_log_warn(extension_differentParse(field, implicit[field], parsedAs.value));
                }
            }
        }
        for (const field of extension_util_keys(explicit)) {
            const parsedAs = ancestorParse.get(field);
            if (parsedAs !== undefined) {
                // Don't parse a field again if it has been parsed with the same type already.
                if (parsedAs === explicit[field]) {
                    delete explicit[field];
                }
                else {
                    extension_log_warn(extension_differentParse(field, explicit[field], parsedAs));
                }
            }
        }
        const parse = new extension_Split(explicit, implicit);
        // add the format parse from this model so that children don't parse the same field again
        ancestorParse.copyAll(parse);
        // copy only non-null parses
        const p = {};
        for (const key of extension_util_keys(parse.combine())) {
            const val = parse.get(key);
            if (val !== null) {
                p[key] = val;
            }
        }
        if (extension_util_keys(p).length === 0 || ancestorParse.parseNothing) {
            return null;
        }
        return new extension_ParseNode(parent, p);
    }
    get parse() {
        return this._parse;
    }
    merge(other) {
        this._parse = { ...this._parse, ...other.parse };
        other.remove();
    }
    /**
     * Assemble an object for Vega's format.parse property.
     */
    assembleFormatParse() {
        const formatParse = {};
        for (const field of extension_util_keys(this._parse)) {
            const p = this._parse[field];
            if (extension_accessPathDepth(field) === 1) {
                formatParse[field] = p;
            }
        }
        return formatParse;
    }
    // format parse depends and produces all fields in its parse
    producedFields() {
        return new Set(extension_util_keys(this._parse));
    }
    dependentFields() {
        return new Set(extension_util_keys(this._parse));
    }
    assembleTransforms(onlyNested = false) {
        return extension_util_keys(this._parse)
            .filter(field => (onlyNested ? extension_accessPathDepth(field) > 1 : true))
            .map(field => {
            const expr = extension_formatparse_parseExpression(field, this._parse[field]);
            if (!expr) {
                return null;
            }
            const formula = {
                type: 'formula',
                expr,
                as: extension_removePathFromField(field) // Vega output is always flattened
            };
            return formula;
        })
            .filter(t => t !== null);
    }
}
//# sourceMappingURL=formatparse.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/identifier.js


class extension_IdentifierNode extends extension_DataFlowNode {
    clone() {
        return new extension_IdentifierNode(null);
    }
    constructor(parent) {
        super(parent);
    }
    dependentFields() {
        return new Set();
    }
    producedFields() {
        return new Set([extension_SELECTION_ID]);
    }
    hash() {
        return 'Identifier';
    }
    assemble() {
        return { type: 'identifier', as: extension_SELECTION_ID };
    }
}
//# sourceMappingURL=identifier.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/graticule.js


class extension_GraticuleNode extends extension_DataFlowNode {
    clone() {
        return new extension_GraticuleNode(null, this.params);
    }
    constructor(parent, params) {
        super(parent);
        this.params = params;
    }
    dependentFields() {
        return new Set();
    }
    producedFields() {
        return undefined; // there should never be a node before graticule
    }
    hash() {
        return `Graticule ${extension_util_hash(this.params)}`;
    }
    assemble() {
        return {
            type: 'graticule',
            ...(this.params === true ? {} : this.params)
        };
    }
}
//# sourceMappingURL=graticule.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/sequence.js


class extension_SequenceNode extends extension_DataFlowNode {
    clone() {
        return new extension_SequenceNode(null, this.params);
    }
    constructor(parent, params) {
        super(parent);
        this.params = params;
    }
    dependentFields() {
        return new Set();
    }
    producedFields() {
        return new Set([this.params.as ?? 'data']);
    }
    hash() {
        return `Hash ${extension_util_hash(this.params)}`;
    }
    assemble() {
        return {
            type: 'sequence',
            ...this.params
        };
    }
}
//# sourceMappingURL=sequence.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/source.js



class extension_SourceNode extends extension_DataFlowNode {
    constructor(data) {
        super(null); // source cannot have parent
        data ?? (data = { name: 'source' });
        let format;
        if (!extension_isGenerator(data)) {
            format = data.format ? { ...extension_omit(data.format, ['parse']) } : {};
        }
        if (extension_isInlineData(data)) {
            this._data = { values: data.values };
        }
        else if (extension_isUrlData(data)) {
            this._data = { url: data.url };
            if (!format.type) {
                // Extract extension from URL using snippet from
                // http://stackoverflow.com/questions/680929/how-to-extract-extension-from-filename-string-in-javascript
                let defaultExtension = /(?:\.([^.]+))?$/.exec(data.url)[1];
                if (!extension_util_contains(['json', 'csv', 'tsv', 'dsv', 'topojson'], defaultExtension)) {
                    defaultExtension = 'json';
                }
                // defaultExtension has type string but we ensure that it is DataFormatType above
                format.type = defaultExtension;
            }
        }
        else if (extension_isSphereGenerator(data)) {
            // hardwire GeoJSON sphere data into output specification
            this._data = { values: [{ type: 'Sphere' }] };
        }
        else if (extension_isNamedData(data) || extension_isGenerator(data)) {
            this._data = {};
        }
        // set flag to check if generator
        this._generator = extension_isGenerator(data);
        // any dataset can be named
        if (data.name) {
            this._name = data.name;
        }
        if (format && !extension_isEmpty(format)) {
            this._data.format = format;
        }
    }
    dependentFields() {
        return new Set();
    }
    producedFields() {
        return undefined; // we don't know what this source produces
    }
    get data() {
        return this._data;
    }
    hasName() {
        return !!this._name;
    }
    get isGenerator() {
        return this._generator;
    }
    get dataName() {
        return this._name;
    }
    set dataName(name) {
        this._name = name;
    }
    set parent(parent) {
        throw new Error('Source nodes have to be roots.');
    }
    remove() {
        throw new Error('Source nodes are roots and cannot be removed.');
    }
    hash() {
        throw new Error('Cannot hash sources');
    }
    assemble() {
        return {
            name: this._name,
            ...this._data,
            transform: []
        };
    }
}
//# sourceMappingURL=source.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/optimizer.js
var extension_optimizer_classPrivateFieldSet = (undefined && undefined.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
    if (kind === "m") throw new TypeError("Private method is not writable");
    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot write private member to an object whose class did not declare it");
    return (kind === "a" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;
};
var extension_optimizer_classPrivateFieldGet = (undefined && undefined.__classPrivateFieldGet) || function (receiver, state, kind, f) {
    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
    return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
};
var extension_Optimizer_modified;



/**
 * Whether this dataflow node is the source of the dataflow that produces data i.e. a source or a generator.
 */
function extension_isDataSourceNode(node) {
    return node instanceof extension_SourceNode || node instanceof extension_GraticuleNode || node instanceof extension_SequenceNode;
}
/**
 * Abstract base class for Dataflow optimizers.
 * Contains only mutation handling logic. Subclasses need to implement iteration logic.
 */
class extension_Optimizer {
    constructor() {
        extension_Optimizer_modified.set(this, void 0);
        extension_optimizer_classPrivateFieldSet(this, extension_Optimizer_modified, false, "f");
    }
    // Once true, #modified is never set to false
    setModified() {
        extension_optimizer_classPrivateFieldSet(this, extension_Optimizer_modified, true, "f");
    }
    get modifiedFlag() {
        return extension_optimizer_classPrivateFieldGet(this, extension_Optimizer_modified, "f");
    }
}
extension_Optimizer_modified = new WeakMap();
/**
 * Starts from a node and runs the optimization function (the "run" method) upwards to the root,
 * depending on the continue and modified flag values returned by the optimization function.
 */
class extension_BottomUpOptimizer extends extension_Optimizer {
    /**
     * Compute a map of node depths that we can use to determine a topological sort order.
     */
    getNodeDepths(node, depth, depths) {
        depths.set(node, depth);
        for (const child of node.children) {
            this.getNodeDepths(child, depth + 1, depths);
        }
        return depths;
    }
    /**
     * Run the optimizer on all nodes starting from the leaves.
     */
    optimize(node) {
        const depths = this.getNodeDepths(node, 0, new Map());
        const topologicalSort = [...depths.entries()].sort((a, b) => b[1] - a[1]);
        for (const tuple of topologicalSort) {
            this.run(tuple[0]);
        }
        return this.modifiedFlag;
    }
}
/**
 * The optimizer function (the "run" method), is invoked on the given node and then continues recursively.
 */
class extension_TopDownOptimizer extends extension_Optimizer {
    /**
     * Run the optimizer depth first on all nodes starting from the roots.
     */
    optimize(node) {
        this.run(node);
        for (const child of node.children) {
            this.optimize(child);
        }
        return this.modifiedFlag;
    }
}
//# sourceMappingURL=optimizer.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/optimizers.js












/**
 * Merge identical nodes at forks by comparing hashes.
 *
 * Does not need to iterate from leaves so we implement this with recursion as it's a bit simpler.
 */
class extension_MergeIdenticalNodes extends extension_TopDownOptimizer {
    mergeNodes(parent, nodes) {
        const mergedNode = nodes.shift();
        for (const node of nodes) {
            parent.removeChild(node);
            node.parent = mergedNode;
            node.remove();
        }
    }
    run(node) {
        const hashes = node.children.map(x => x.hash());
        const buckets = {};
        for (let i = 0; i < hashes.length; i++) {
            if (buckets[hashes[i]] === undefined) {
                buckets[hashes[i]] = [node.children[i]];
            }
            else {
                buckets[hashes[i]].push(node.children[i]);
            }
        }
        for (const k of extension_util_keys(buckets)) {
            if (buckets[k].length > 1) {
                this.setModified();
                this.mergeNodes(node, buckets[k]);
            }
        }
    }
}
/**
 * Optimizer that removes identifier nodes that are not needed for selections.
 */
class extension_RemoveUnnecessaryIdentifierNodes extends extension_TopDownOptimizer {
    constructor(model) {
        super();
        this.requiresSelectionId = model && extension_requiresSelectionId(model);
    }
    run(node) {
        if (node instanceof extension_IdentifierNode) {
            // Only preserve IdentifierNodes if we have default discrete selections
            // in our model tree, and if the nodes come after tuple producing nodes.
            if (!(this.requiresSelectionId &&
                (extension_isDataSourceNode(node.parent) || node.parent instanceof extension_AggregateNode || node.parent instanceof extension_ParseNode))) {
                this.setModified();
                node.remove();
            }
        }
    }
}
/**
 * Removes duplicate time unit nodes (as determined by the name of the output field) that may be generated due to
 * selections projected over time units. Only keeps the first time unit in any branch.
 *
 * This optimizer is a custom top down optimizer that keep track of produced fields in a branch.
 */
class extension_RemoveDuplicateTimeUnits extends extension_Optimizer {
    optimize(node) {
        this.run(node, new Set());
        return this.modifiedFlag;
    }
    run(node, timeUnitFields) {
        let producedFields = new Set();
        if (node instanceof extension_TimeUnitNode) {
            producedFields = node.producedFields();
            if (extension_hasIntersection(producedFields, timeUnitFields)) {
                this.setModified();
                node.removeFormulas(timeUnitFields);
                if (node.producedFields.length === 0) {
                    node.remove();
                }
            }
        }
        for (const child of node.children) {
            this.run(child, new Set([...timeUnitFields, ...producedFields]));
        }
    }
}
/**
 * Remove output nodes that are not required.
 */
class extension_RemoveUnnecessaryOutputNodes extends extension_TopDownOptimizer {
    constructor() {
        super();
    }
    run(node) {
        if (node instanceof extension_OutputNode && !node.isRequired()) {
            this.setModified();
            node.remove();
        }
    }
}
/**
 * Move parse nodes up to forks and merges them if possible.
 */
class extension_MoveParseUp extends extension_BottomUpOptimizer {
    run(node) {
        if (extension_isDataSourceNode(node)) {
            return;
        }
        if (node.numChildren() > 1) {
            // Don't move parse further up but continue with parent.
            return;
        }
        for (const child of node.children) {
            if (child instanceof extension_ParseNode) {
                if (node instanceof extension_ParseNode) {
                    this.setModified();
                    node.merge(child);
                }
                else {
                    // Don't swap with nodes that produce something that the parse node depends on (e.g. lookup).
                    if (extension_fieldIntersection(node.producedFields(), child.dependentFields())) {
                        continue;
                    }
                    this.setModified();
                    child.swapWithParent();
                }
            }
        }
        return;
    }
}
/**
 * Inserts an intermediate ParseNode containing all non-conflicting parse fields and removes the empty ParseNodes.
 *
 * We assume that dependent paths that do not have a parse node can be just merged.
 */
class extension_MergeParse extends extension_BottomUpOptimizer {
    run(node) {
        const originalChildren = [...node.children];
        const parseChildren = node.children.filter((child) => child instanceof extension_ParseNode);
        if (node.numChildren() > 1 && parseChildren.length >= 1) {
            const commonParse = {};
            const conflictingParse = new Set();
            for (const parseNode of parseChildren) {
                const parse = parseNode.parse;
                for (const k of extension_util_keys(parse)) {
                    if (!(k in commonParse)) {
                        commonParse[k] = parse[k];
                    }
                    else if (commonParse[k] !== parse[k]) {
                        conflictingParse.add(k);
                    }
                }
            }
            for (const field of conflictingParse) {
                delete commonParse[field];
            }
            if (!extension_isEmpty(commonParse)) {
                this.setModified();
                const mergedParseNode = new extension_ParseNode(node, commonParse);
                for (const childNode of originalChildren) {
                    if (childNode instanceof extension_ParseNode) {
                        for (const key of extension_util_keys(commonParse)) {
                            delete childNode.parse[key];
                        }
                    }
                    node.removeChild(childNode);
                    childNode.parent = mergedParseNode;
                    // remove empty parse nodes
                    if (childNode instanceof extension_ParseNode && extension_util_keys(childNode.parse).length === 0) {
                        childNode.remove();
                    }
                }
            }
        }
    }
}
/**
 * Repeatedly remove leaf nodes that are not output or facet nodes.
 * The reason is that we don't need subtrees that don't have any output nodes.
 * Facet nodes are needed for the row or column domains.
 */
class extension_RemoveUnusedSubtrees extends extension_BottomUpOptimizer {
    run(node) {
        if (node instanceof extension_OutputNode || node.numChildren() > 0 || node instanceof extension_FacetNode) {
            // no need to continue with parent because it is output node or will have children (there was a fork)
        }
        else if (node instanceof extension_SourceNode) {
            // ignore empty unused sources as they will be removed in optimizationDataflowHelper
        }
        else {
            this.setModified();
            node.remove();
        }
    }
}
/**
 * Merge adjacent time unit nodes.
 */
class extension_MergeTimeUnits extends extension_BottomUpOptimizer {
    run(node) {
        const timeUnitChildren = node.children.filter((x) => x instanceof extension_TimeUnitNode);
        const combination = timeUnitChildren.pop();
        for (const timeUnit of timeUnitChildren) {
            this.setModified();
            combination.merge(timeUnit);
        }
    }
}
class extension_MergeAggregates extends extension_BottomUpOptimizer {
    run(node) {
        const aggChildren = node.children.filter((child) => child instanceof extension_AggregateNode);
        // Object which we'll use to map the fields which an aggregate is grouped by to
        // the set of aggregates with that grouping. This is useful as only aggregates
        // with the same group by can be merged
        const groupedAggregates = {};
        // Build groupedAggregates
        for (const agg of aggChildren) {
            const groupBys = extension_util_hash(agg.groupBy);
            if (!(groupBys in groupedAggregates)) {
                groupedAggregates[groupBys] = [];
            }
            groupedAggregates[groupBys].push(agg);
        }
        // Merge aggregateNodes with same key in groupedAggregates
        for (const group of extension_util_keys(groupedAggregates)) {
            const mergeableAggs = groupedAggregates[group];
            if (mergeableAggs.length > 1) {
                const mergedAggs = mergeableAggs.pop();
                for (const agg of mergeableAggs) {
                    if (mergedAggs.merge(agg)) {
                        node.removeChild(agg);
                        agg.parent = mergedAggs;
                        agg.remove();
                        this.setModified();
                    }
                }
            }
        }
    }
}
/**
 * Merge bin nodes and move them up through forks. Stop at filters, parse, identifier as we want them to stay before the bin node.
 */
class extension_MergeBins extends extension_BottomUpOptimizer {
    constructor(model) {
        super();
        this.model = model;
    }
    run(node) {
        const moveBinsUp = !(extension_isDataSourceNode(node) ||
            node instanceof extension_FilterNode ||
            node instanceof extension_ParseNode ||
            node instanceof extension_IdentifierNode);
        const promotableBins = [];
        const remainingBins = [];
        for (const child of node.children) {
            if (child instanceof extension_BinNode) {
                if (moveBinsUp && !extension_fieldIntersection(node.producedFields(), child.dependentFields())) {
                    promotableBins.push(child);
                }
                else {
                    remainingBins.push(child);
                }
            }
        }
        if (promotableBins.length > 0) {
            const promotedBin = promotableBins.pop();
            for (const bin of promotableBins) {
                promotedBin.merge(bin, this.model.renameSignal.bind(this.model));
            }
            this.setModified();
            if (node instanceof extension_BinNode) {
                node.merge(promotedBin, this.model.renameSignal.bind(this.model));
            }
            else {
                promotedBin.swapWithParent();
            }
        }
        if (remainingBins.length > 1) {
            const remainingBin = remainingBins.pop();
            for (const bin of remainingBins) {
                remainingBin.merge(bin, this.model.renameSignal.bind(this.model));
            }
            this.setModified();
        }
    }
}
/**
 * This optimizer takes output nodes that are at a fork and moves them before the fork.
 *
 * The algorithm iterates over the children and tries to find the last output node in a chain of output nodes.
 * It then moves all output nodes before that main output node. All other children (and the children of the output nodes)
 * are inserted after the main output node.
 */
class extension_MergeOutputs extends extension_BottomUpOptimizer {
    run(node) {
        const children = [...node.children];
        const hasOutputChild = extension_some(children, child => child instanceof extension_OutputNode);
        if (!hasOutputChild || node.numChildren() <= 1) {
            return;
        }
        const otherChildren = [];
        // The output node we will connect all other nodes to.
        // Output nodes will be added before the new node, other nodes after.
        let mainOutput;
        for (const child of children) {
            if (child instanceof extension_OutputNode) {
                let lastOutput = child;
                while (lastOutput.numChildren() === 1) {
                    const [theChild] = lastOutput.children;
                    if (theChild instanceof extension_OutputNode) {
                        lastOutput = theChild;
                    }
                    else {
                        break;
                    }
                }
                otherChildren.push(...lastOutput.children);
                if (mainOutput) {
                    // Move the output nodes before the mainOutput. We do this by setting
                    // the parent of the first not to the parent of the main output and
                    // the main output's parent to the last output.
                    // note: the child is the first output
                    node.removeChild(child);
                    child.parent = mainOutput.parent;
                    mainOutput.parent.removeChild(mainOutput);
                    mainOutput.parent = lastOutput;
                    this.setModified();
                }
                else {
                    mainOutput = lastOutput;
                }
            }
            else {
                otherChildren.push(child);
            }
        }
        if (otherChildren.length) {
            this.setModified();
            for (const child of otherChildren) {
                child.parent.removeChild(child);
                child.parent = mainOutput;
            }
        }
    }
}
//# sourceMappingURL=optimizers.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/joinaggregate.js




/**
 * A class for the join aggregate transform nodes.
 */
class extension_JoinAggregateTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_JoinAggregateTransformNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
    }
    addDimensions(fields) {
        this.transform.groupby = extension_unique(this.transform.groupby.concat(fields), d => d);
    }
    dependentFields() {
        const out = new Set();
        if (this.transform.groupby) {
            this.transform.groupby.forEach(out.add, out);
        }
        this.transform.joinaggregate
            .map(w => w.field)
            .filter(f => f !== undefined)
            .forEach(out.add, out);
        return out;
    }
    producedFields() {
        return new Set(this.transform.joinaggregate.map(this.getDefaultName));
    }
    getDefaultName(joinAggregateFieldDef) {
        return joinAggregateFieldDef.as ?? extension_vgField(joinAggregateFieldDef);
    }
    hash() {
        return `JoinAggregateTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const fields = [];
        const ops = [];
        const as = [];
        for (const joinaggregate of this.transform.joinaggregate) {
            ops.push(joinaggregate.op);
            as.push(this.getDefaultName(joinaggregate));
            fields.push(joinaggregate.field === undefined ? null : joinaggregate.field);
        }
        const groupby = this.transform.groupby;
        return {
            type: 'joinaggregate',
            as,
            ops,
            fields,
            ...(groupby !== undefined ? { groupby } : {})
        };
    }
}
//# sourceMappingURL=joinaggregate.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/filterinvalid.js






class extension_FilterInvalidNode extends extension_DataFlowNode {
    clone() {
        return new extension_FilterInvalidNode(null, { ...this.filter });
    }
    constructor(parent, filter) {
        super(parent);
        this.filter = filter;
    }
    static make(parent, model, dataSourcesForHandlingInvalidValues) {
        const { config, markDef } = model;
        const { marks, scales } = dataSourcesForHandlingInvalidValues;
        if (marks === 'include-invalid-values' && scales === 'include-invalid-values') {
            // If neither marks nor scale domains need data source to filter null values, then don't add the filter.
            return null;
        }
        const filter = model.reduceFieldDef((aggregator, fieldDef, channel) => {
            const scaleComponent = extension_isScaleChannel(channel) && model.getScaleComponent(channel);
            if (scaleComponent) {
                const scaleType = scaleComponent.get('type');
                const { aggregate } = fieldDef;
                const invalidDataMode = extension_getScaleInvalidDataMode({
                    scaleChannel: channel,
                    markDef,
                    config,
                    scaleType,
                    isCountAggregate: extension_isCountingAggregateOp(aggregate)
                });
                // If the invalid data mode is include or always-valid, we don't need to filter invalid values as the scale can handle invalid values.
                if (invalidDataMode !== 'show' && invalidDataMode !== 'always-valid') {
                    aggregator[fieldDef.field] = fieldDef; // we know that the fieldDef is a typed field def
                }
            }
            return aggregator;
        }, {});
        if (!extension_util_keys(filter).length) {
            return null;
        }
        return new extension_FilterInvalidNode(parent, filter);
    }
    dependentFields() {
        return new Set(extension_util_keys(this.filter));
    }
    producedFields() {
        return new Set(); // filter does not produce any new fields
    }
    hash() {
        return `FilterInvalid ${extension_util_hash(this.filter)}`;
    }
    /**
     * Create the VgTransforms for each of the filtered fields.
     */
    assemble() {
        const filters = extension_util_keys(this.filter).reduce((vegaFilters, field) => {
            const fieldDef = this.filter[field];
            const ref = extension_vgField(fieldDef, { expr: 'datum' });
            if (fieldDef !== null) {
                if (fieldDef.type === 'temporal') {
                    vegaFilters.push(`(isDate(${ref}) || (${extension_isValidFiniteNumberExpr(ref)}))`);
                }
                else if (fieldDef.type === 'quantitative') {
                    vegaFilters.push(extension_isValidFiniteNumberExpr(ref));
                }
                else {
                    // should never get here
                }
            }
            return vegaFilters;
        }, []);
        return filters.length > 0
            ? {
                type: 'filter',
                expr: filters.join(' && ')
            }
            : null;
    }
}
function extension_isValidFiniteNumberExpr(ref) {
    return `isValid(${ref}) && isFinite(+${ref})`;
}
//# sourceMappingURL=filterinvalid.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/stack.js






function extension_getStackByFields(model) {
    return model.stack.stackBy.reduce((fields, by) => {
        const fieldDef = by.fieldDef;
        const _field = extension_vgField(fieldDef);
        if (_field) {
            fields.push(_field);
        }
        return fields;
    }, []);
}
function extension_isValidAsArray(as) {
    return extension_vega_util_module_isArray(as) && as.every(s => extension_vega_util_module_isString(s)) && as.length > 1;
}
class extension_StackNode extends extension_DataFlowNode {
    clone() {
        return new extension_StackNode(null, extension_duplicate(this._stack));
    }
    constructor(parent, stack) {
        super(parent);
        this._stack = stack;
    }
    static makeFromTransform(parent, stackTransform) {
        const { stack, groupby, as, offset = 'zero' } = stackTransform;
        const sortFields = [];
        const sortOrder = [];
        if (stackTransform.sort !== undefined) {
            for (const sortField of stackTransform.sort) {
                sortFields.push(sortField.field);
                sortOrder.push(extension_getFirstDefined(sortField.order, 'ascending'));
            }
        }
        const sort = {
            field: sortFields,
            order: sortOrder
        };
        let normalizedAs;
        if (extension_isValidAsArray(as)) {
            normalizedAs = as;
        }
        else if (extension_vega_util_module_isString(as)) {
            normalizedAs = [as, `${as}_end`];
        }
        else {
            normalizedAs = [`${stackTransform.stack}_start`, `${stackTransform.stack}_end`];
        }
        return new extension_StackNode(parent, {
            dimensionFieldDefs: [],
            stackField: stack,
            groupby,
            offset,
            sort,
            facetby: [],
            as: normalizedAs
        });
    }
    static makeFromEncoding(parent, model) {
        const stackProperties = model.stack;
        const { encoding } = model;
        if (!stackProperties) {
            return null;
        }
        const { groupbyChannels, fieldChannel, offset, impute } = stackProperties;
        const dimensionFieldDefs = groupbyChannels
            .map(groupbyChannel => {
            const cDef = encoding[groupbyChannel];
            return extension_getFieldDef(cDef);
        })
            .filter(def => !!def);
        const stackby = extension_getStackByFields(model);
        const orderDef = model.encoding.order;
        let sort;
        if (extension_vega_util_module_isArray(orderDef) || extension_isFieldDef(orderDef)) {
            sort = extension_sortParams(orderDef);
        }
        else {
            const sortOrder = extension_isOrderOnlyDef(orderDef) ? orderDef.sort : fieldChannel === 'y' ? 'descending' : 'ascending';
            // default = descending by stackFields
            // FIXME is the default here correct for binned fields?
            sort = stackby.reduce((s, field) => {
                if (!s.field.includes(field)) {
                    s.field.push(field);
                    s.order.push(sortOrder);
                }
                return s;
            }, { field: [], order: [] });
        }
        return new extension_StackNode(parent, {
            dimensionFieldDefs,
            stackField: model.vgField(fieldChannel),
            facetby: [],
            stackby,
            sort,
            offset,
            impute,
            as: [
                model.vgField(fieldChannel, { suffix: 'start', forAs: true }),
                model.vgField(fieldChannel, { suffix: 'end', forAs: true })
            ]
        });
    }
    get stack() {
        return this._stack;
    }
    addDimensions(fields) {
        this._stack.facetby.push(...fields);
    }
    dependentFields() {
        const out = new Set();
        out.add(this._stack.stackField);
        this.getGroupbyFields().forEach(out.add, out);
        this._stack.facetby.forEach(out.add, out);
        this._stack.sort.field.forEach(out.add, out);
        return out;
    }
    producedFields() {
        return new Set(this._stack.as);
    }
    hash() {
        return `Stack ${extension_util_hash(this._stack)}`;
    }
    getGroupbyFields() {
        const { dimensionFieldDefs, impute, groupby } = this._stack;
        if (dimensionFieldDefs.length > 0) {
            return dimensionFieldDefs
                .map(dimensionFieldDef => {
                if (dimensionFieldDef.bin) {
                    if (impute) {
                        // For binned group by field with impute, we calculate bin_mid
                        // as we cannot impute two fields simultaneously
                        return [extension_vgField(dimensionFieldDef, { binSuffix: 'mid' })];
                    }
                    return [
                        // For binned group by field without impute, we need both bin (start) and bin_end
                        extension_vgField(dimensionFieldDef, {}),
                        extension_vgField(dimensionFieldDef, { binSuffix: 'end' })
                    ];
                }
                return [extension_vgField(dimensionFieldDef)];
            })
                .flat();
        }
        return groupby ?? [];
    }
    assemble() {
        const transform = [];
        const { facetby, dimensionFieldDefs, stackField: field, stackby, sort, offset, impute, as } = this._stack;
        // Impute
        if (impute) {
            for (const dimensionFieldDef of dimensionFieldDefs) {
                const { bandPosition = 0.5, bin } = dimensionFieldDef;
                if (bin) {
                    // As we can only impute one field at a time, we need to calculate
                    // mid point for a binned field
                    const binStart = extension_vgField(dimensionFieldDef, { expr: 'datum' });
                    const binEnd = extension_vgField(dimensionFieldDef, { expr: 'datum', binSuffix: 'end' });
                    transform.push({
                        type: 'formula',
                        expr: `${extension_isValidFiniteNumberExpr(binStart)} ? ${bandPosition}*${binStart}+${1 - bandPosition}*${binEnd} : ${binStart}`,
                        as: extension_vgField(dimensionFieldDef, { binSuffix: 'mid', forAs: true })
                    });
                }
                transform.push({
                    type: 'impute',
                    field,
                    groupby: [...stackby, ...facetby],
                    key: extension_vgField(dimensionFieldDef, { binSuffix: 'mid' }),
                    method: 'value',
                    value: 0
                });
            }
        }
        // Stack
        transform.push({
            type: 'stack',
            groupby: [...this.getGroupbyFields(), ...facetby],
            field,
            sort,
            as,
            offset
        });
        return transform;
    }
}
//# sourceMappingURL=stack.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/window.js





/**
 * A class for the window transform nodes
 */
class extension_WindowTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_WindowTransformNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
    }
    addDimensions(fields) {
        this.transform.groupby = extension_unique(this.transform.groupby.concat(fields), d => d);
    }
    dependentFields() {
        const out = new Set();
        (this.transform.groupby ?? []).forEach(out.add, out);
        (this.transform.sort ?? []).forEach(m => out.add(m.field));
        this.transform.window
            .map(w => w.field)
            .filter(f => f !== undefined)
            .forEach(out.add, out);
        return out;
    }
    producedFields() {
        return new Set(this.transform.window.map(this.getDefaultName));
    }
    getDefaultName(windowFieldDef) {
        return windowFieldDef.as ?? extension_vgField(windowFieldDef);
    }
    hash() {
        return `WindowTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const fields = [];
        const ops = [];
        const as = [];
        const params = [];
        for (const window of this.transform.window) {
            ops.push(window.op);
            as.push(this.getDefaultName(window));
            params.push(window.param === undefined ? null : window.param);
            fields.push(window.field === undefined ? null : window.field);
        }
        const frame = this.transform.frame;
        const groupby = this.transform.groupby;
        if (frame && frame[0] === null && frame[1] === null && ops.every(o => extension_isAggregateOp(o))) {
            // when the window does not rely on any particular window ops or frame, switch to a simpler and more efficient joinaggregate
            return {
                type: 'joinaggregate',
                as,
                ops: ops,
                fields,
                ...(groupby !== undefined ? { groupby } : {})
            };
        }
        const sortFields = [];
        const sortOrder = [];
        if (this.transform.sort !== undefined) {
            for (const sortField of this.transform.sort) {
                sortFields.push(sortField.field);
                sortOrder.push(sortField.order ?? 'ascending');
            }
        }
        const sort = {
            field: sortFields,
            order: sortOrder
        };
        const ignorePeers = this.transform.ignorePeers;
        return {
            type: 'window',
            params,
            as,
            ops,
            fields,
            sort,
            ...(ignorePeers !== undefined ? { ignorePeers } : {}),
            ...(groupby !== undefined ? { groupby } : {}),
            ...(frame !== undefined ? { frame } : {})
        };
    }
}
//# sourceMappingURL=window.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/subtree.js








/**
 * Clones the subtree and ignores output nodes except for the leaves, which are renamed.
 */
function extension_cloneSubtree(facet) {
    function clone(node) {
        if (!(node instanceof extension_FacetNode)) {
            const copy = node.clone();
            if (copy instanceof extension_OutputNode) {
                const newName = extension_FACET_SCALE_PREFIX + copy.getSource();
                copy.setSource(newName);
                facet.model.component.data.outputNodes[newName] = copy;
            }
            else if (copy instanceof extension_AggregateNode ||
                copy instanceof extension_StackNode ||
                copy instanceof extension_WindowTransformNode ||
                copy instanceof extension_JoinAggregateTransformNode) {
                copy.addDimensions(facet.fields);
            }
            for (const n of node.children.flatMap(clone)) {
                n.parent = copy;
            }
            return [copy];
        }
        return node.children.flatMap(clone);
    }
    return clone;
}
/**
 * Move facet nodes down to the next fork or output node. Also pull the main output with the facet node.
 * After moving down the facet node, make a copy of the subtree and make it a child of the main output.
 */
function extension_moveFacetDown(node) {
    if (node instanceof extension_FacetNode) {
        if (node.numChildren() === 1 && !(node.children[0] instanceof extension_OutputNode)) {
            // move down until we hit a fork or output node
            const child = node.children[0];
            if (child instanceof extension_AggregateNode ||
                child instanceof extension_StackNode ||
                child instanceof extension_WindowTransformNode ||
                child instanceof extension_JoinAggregateTransformNode) {
                child.addDimensions(node.fields);
            }
            child.swapWithParent();
            extension_moveFacetDown(node);
        }
        else {
            // move main to facet
            const facetMain = node.model.component.data.main;
            extension_moveMainDownToFacet(facetMain);
            // replicate the subtree and place it before the facet's main node
            const cloner = extension_cloneSubtree(node);
            const copy = node.children.map(cloner).flat();
            for (const c of copy) {
                c.parent = facetMain;
            }
        }
    }
    else {
        node.children.map(extension_moveFacetDown);
    }
}
function extension_moveMainDownToFacet(node) {
    if (node instanceof extension_OutputNode && node.type === extension_DataSourceType.Main) {
        if (node.numChildren() === 1) {
            const child = node.children[0];
            if (!(child instanceof extension_FacetNode)) {
                child.swapWithParent();
                extension_moveMainDownToFacet(node);
            }
        }
    }
}
//# sourceMappingURL=subtree.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/optimize.js



const extension_FACET_SCALE_PREFIX = 'scale_';
const extension_MAX_OPTIMIZATION_RUNS = 5;
/**
 * Iterates over a dataflow graph and checks whether all links are consistent.
 */
function extension_checkLinks(nodes) {
    for (const node of nodes) {
        for (const child of node.children) {
            if (child.parent !== node) {
                // log.error('Dataflow graph is inconsistent.', node, child);
                return false;
            }
        }
        if (!extension_checkLinks(node.children)) {
            return false;
        }
    }
    return true;
}
/**
 * Run the specified optimizer on the provided nodes.
 *
 * @param optimizer The optimizer instance to run.
 * @param nodes A set of nodes to optimize.
 */
function extension_runOptimizer(optimizer, nodes) {
    let modified = false;
    for (const node of nodes) {
        modified = optimizer.optimize(node) || modified;
    }
    return modified;
}
function extension_optimizationDataflowHelper(dataComponent, model, firstPass) {
    let roots = dataComponent.sources;
    let modified = false;
    modified = extension_runOptimizer(new extension_RemoveUnnecessaryOutputNodes(), roots) || modified;
    modified = extension_runOptimizer(new extension_RemoveUnnecessaryIdentifierNodes(model), roots) || modified;
    // remove source nodes that don't have any children because they also don't have output nodes
    roots = roots.filter(r => r.numChildren() > 0);
    modified = extension_runOptimizer(new extension_RemoveUnusedSubtrees(), roots) || modified;
    roots = roots.filter(r => r.numChildren() > 0);
    if (!firstPass) {
        // Only run these optimizations after the optimizer has moved down the facet node.
        // With this change, we can be more aggressive in the optimizations.
        modified = extension_runOptimizer(new extension_MoveParseUp(), roots) || modified;
        modified = extension_runOptimizer(new extension_MergeBins(model), roots) || modified;
        modified = extension_runOptimizer(new extension_RemoveDuplicateTimeUnits(), roots) || modified;
        modified = extension_runOptimizer(new extension_MergeParse(), roots) || modified;
        modified = extension_runOptimizer(new extension_MergeAggregates(), roots) || modified;
        modified = extension_runOptimizer(new extension_MergeTimeUnits(), roots) || modified;
        modified = extension_runOptimizer(new extension_MergeIdenticalNodes(), roots) || modified;
        modified = extension_runOptimizer(new extension_MergeOutputs(), roots) || modified;
    }
    dataComponent.sources = roots;
    return modified;
}
/**
 * Optimizes the dataflow of the passed in data component.
 */
function extension_optimizeDataflow(data, model) {
    // check before optimizations
    extension_checkLinks(data.sources);
    let firstPassCounter = 0;
    let secondPassCounter = 0;
    for (let i = 0; i < extension_MAX_OPTIMIZATION_RUNS; i++) {
        if (!extension_optimizationDataflowHelper(data, model, true)) {
            break;
        }
        firstPassCounter++;
    }
    // move facets down and make a copy of the subtree so that we can have scales at the top level
    data.sources.map(extension_moveFacetDown);
    for (let i = 0; i < extension_MAX_OPTIMIZATION_RUNS; i++) {
        if (!extension_optimizationDataflowHelper(data, model, false)) {
            break;
        }
        secondPassCounter++;
    }
    // check after optimizations
    extension_checkLinks(data.sources);
    if (Math.max(firstPassCounter, secondPassCounter) === extension_MAX_OPTIMIZATION_RUNS) {
        extension_log_warn(`Maximum optimization runs(${extension_MAX_OPTIMIZATION_RUNS}) reached.`);
    }
}
//# sourceMappingURL=optimize.js.map
;// ../../node_modules/vega-lite/build/src/compile/signal.js
/**
 * A class that behaves like a SignalRef but lazily generates the signal.
 * The provided generator function should use `Model.getSignalName` to use the correct signal name.
 */
class extension_SignalRefWrapper {
    constructor(exprGenerator) {
        Object.defineProperty(this, 'signal', {
            enumerable: true,
            get: exprGenerator
        });
    }
    static fromName(rename, signalName) {
        return new extension_SignalRefWrapper(() => rename(signalName));
    }
}
//# sourceMappingURL=signal.js.map
;// ../../node_modules/vega-lite/build/src/compile/scale/domain.js






















function extension_domain_parseScaleDomain(model) {
    if (extension_isUnitModel(model)) {
        extension_parseUnitScaleDomain(model);
    }
    else {
        extension_parseNonUnitScaleDomain(model);
    }
}
function extension_parseUnitScaleDomain(model) {
    const localScaleComponents = model.component.scales;
    for (const channel of extension_util_keys(localScaleComponents)) {
        const domains = extension_parseDomainForChannel(model, channel);
        const localScaleCmpt = localScaleComponents[channel];
        localScaleCmpt.setWithExplicit('domains', domains);
        extension_parseSelectionDomain(model, channel);
        if (model.component.data.isFaceted) {
            // get resolve from closest facet parent as this decides whether we need to refer to cloned subtree or not
            let facetParent = model;
            while (!extension_isFacetModel(facetParent) && facetParent.parent) {
                facetParent = facetParent.parent;
            }
            const resolve = facetParent.component.resolve.scale[channel];
            if (resolve === 'shared') {
                for (const domain of domains.value) {
                    // Replace the scale domain with data output from a cloned subtree after the facet.
                    if (extension_isDataRefDomain(domain)) {
                        // use data from cloned subtree (which is the same as data but with a prefix added once)
                        domain.data = extension_FACET_SCALE_PREFIX + domain.data.replace(extension_FACET_SCALE_PREFIX, '');
                    }
                }
            }
        }
    }
}
function extension_parseNonUnitScaleDomain(model) {
    for (const child of model.children) {
        extension_domain_parseScaleDomain(child);
    }
    const localScaleComponents = model.component.scales;
    for (const channel of extension_util_keys(localScaleComponents)) {
        let domains;
        let selectionExtent = null;
        for (const child of model.children) {
            const childComponent = child.component.scales[channel];
            if (childComponent) {
                if (domains === undefined) {
                    domains = childComponent.getWithExplicit('domains');
                }
                else {
                    domains = extension_mergeValuesWithExplicit(domains, childComponent.getWithExplicit('domains'), 'domains', 'scale', extension_domainsTieBreaker);
                }
                const se = childComponent.get('selectionExtent');
                if (selectionExtent && se && selectionExtent.param !== se.param) {
                    extension_log_warn(extension_NEEDS_SAME_SELECTION);
                }
                selectionExtent = se;
            }
        }
        localScaleComponents[channel].setWithExplicit('domains', domains);
        if (selectionExtent) {
            localScaleComponents[channel].set('selectionExtent', selectionExtent, true);
        }
    }
}
/**
 * Remove unaggregated domain if it is not applicable
 * Add unaggregated domain if domain is not specified and config.scale.useUnaggregatedDomain is true.
 */
function extension_normalizeUnaggregatedDomain(domain, fieldDef, scaleType, scaleConfig) {
    if (domain === 'unaggregated') {
        const { valid, reason } = extension_canUseUnaggregatedDomain(fieldDef, scaleType);
        if (!valid) {
            extension_log_warn(reason);
            return undefined;
        }
    }
    else if (domain === undefined && scaleConfig.useUnaggregatedDomain) {
        // Apply config if domain is not specified.
        const { valid } = extension_canUseUnaggregatedDomain(fieldDef, scaleType);
        if (valid) {
            return 'unaggregated';
        }
    }
    return domain;
}
function extension_parseDomainForChannel(model, channel) {
    const scaleType = model.getScaleComponent(channel).get('type');
    const { encoding } = model;
    const domain = extension_normalizeUnaggregatedDomain(model.scaleDomain(channel), model.typedFieldDef(channel), scaleType, model.config.scale);
    if (domain !== model.scaleDomain(channel)) {
        model.specifiedScales[channel] = {
            ...model.specifiedScales[channel],
            domain
        };
    }
    // If channel is either X or Y then union them with X2 & Y2 if they exist
    if (channel === 'x' && extension_getFieldOrDatumDef(encoding.x2)) {
        if (extension_getFieldOrDatumDef(encoding.x)) {
            return extension_mergeValuesWithExplicit(extension_parseSingleChannelDomain(scaleType, domain, model, 'x'), extension_parseSingleChannelDomain(scaleType, domain, model, 'x2'), 'domain', 'scale', extension_domainsTieBreaker);
        }
        else {
            return extension_parseSingleChannelDomain(scaleType, domain, model, 'x2');
        }
    }
    else if (channel === 'y' && extension_getFieldOrDatumDef(encoding.y2)) {
        if (extension_getFieldOrDatumDef(encoding.y)) {
            return extension_mergeValuesWithExplicit(extension_parseSingleChannelDomain(scaleType, domain, model, 'y'), extension_parseSingleChannelDomain(scaleType, domain, model, 'y2'), 'domain', 'scale', extension_domainsTieBreaker);
        }
        else {
            return extension_parseSingleChannelDomain(scaleType, domain, model, 'y2');
        }
    }
    return extension_parseSingleChannelDomain(scaleType, domain, model, channel);
}
function extension_mapDomainToDataSignal(domain, type, timeUnit) {
    return domain.map(v => {
        const data = extension_valueExpr(v, { timeUnit, type });
        return { signal: `{data: ${data}}` };
    });
}
function extension_convertDomainIfItIsDateTime(domain, type, timeUnit) {
    // explicit value
    const normalizedTimeUnit = extension_normalizeTimeUnit(timeUnit)?.unit;
    if (type === 'temporal' || normalizedTimeUnit) {
        return extension_mapDomainToDataSignal(domain, type, normalizedTimeUnit);
    }
    return [domain]; // Date time won't make sense
}
function extension_parseSingleChannelDomain(scaleType, domain, model, channel) {
    const { encoding, markDef, mark, config, stack } = model;
    const fieldOrDatumDef = extension_getFieldOrDatumDef(encoding[channel]);
    const { type } = fieldOrDatumDef;
    const timeUnit = fieldOrDatumDef['timeUnit'];
    const dataSourceTypeForScaleDomain = extension_getScaleDataSourceForHandlingInvalidValues({
        invalid: extension_getMarkConfig('invalid', markDef, config),
        isPath: extension_isPathMark(mark)
    });
    if (extension_isDomainUnionWith(domain)) {
        const defaultDomain = extension_parseSingleChannelDomain(scaleType, undefined, model, channel);
        const unionWith = extension_convertDomainIfItIsDateTime(domain.unionWith, type, timeUnit);
        return extension_makeExplicit([...unionWith, ...defaultDomain.value]);
    }
    else if (extension_isSignalRef(domain)) {
        return extension_makeExplicit([domain]);
    }
    else if (domain && domain !== 'unaggregated' && !extension_isParameterDomain(domain)) {
        return extension_makeExplicit(extension_convertDomainIfItIsDateTime(domain, type, timeUnit));
    }
    if (stack && channel === stack.fieldChannel) {
        if (stack.offset === 'normalize') {
            return extension_makeImplicit([[0, 1]]);
        }
        const data = model.requestDataName(dataSourceTypeForScaleDomain);
        return extension_makeImplicit([
            {
                data,
                field: model.vgField(channel, { suffix: 'start' })
            },
            {
                data,
                field: model.vgField(channel, { suffix: 'end' })
            }
        ]);
    }
    const sort = extension_isScaleChannel(channel) && extension_isFieldDef(fieldOrDatumDef) ? extension_domainSort(model, channel, scaleType) : undefined;
    if (extension_isDatumDef(fieldOrDatumDef)) {
        const d = extension_convertDomainIfItIsDateTime([fieldOrDatumDef.datum], type, timeUnit);
        return extension_makeImplicit(d);
    }
    const fieldDef = fieldOrDatumDef; // now we can be sure it's a fieldDef
    if (domain === 'unaggregated') {
        const { field } = fieldOrDatumDef;
        return extension_makeImplicit([
            {
                data: model.requestDataName(dataSourceTypeForScaleDomain),
                field: extension_vgField({ field, aggregate: 'min' })
            },
            {
                data: model.requestDataName(dataSourceTypeForScaleDomain),
                field: extension_vgField({ field, aggregate: 'max' })
            }
        ]);
    }
    else if (extension_isBinning(fieldDef.bin)) {
        if (extension_hasDiscreteDomain(scaleType)) {
            if (scaleType === 'bin-ordinal') {
                // we can omit the domain as it is inferred from the `bins` property
                return extension_makeImplicit([]);
            }
            // ordinal bin scale takes domain from bin_range, ordered by bin start
            // This is useful for both axis-based scale (x/y) and legend-based scale (other channels).
            return extension_makeImplicit([
                {
                    // If sort by aggregation of a specified sort field, we need to use RAW table,
                    // so we can aggregate values for the scale independently from the main aggregation.
                    data: extension_util_isBoolean(sort)
                        ? model.requestDataName(dataSourceTypeForScaleDomain)
                        : model.requestDataName(extension_DataSourceType.Raw),
                    // Use range if we added it and the scale does not support computing a range as a signal.
                    field: model.vgField(channel, extension_binRequiresRange(fieldDef, channel) ? { binSuffix: 'range' } : {}),
                    // we have to use a sort object if sort = true to make the sort correct by bin start
                    sort: sort === true || !extension_vega_util_module_isObject(sort)
                        ? {
                            field: model.vgField(channel, {}),
                            op: 'min' // min or max doesn't matter since we sort by the start of the bin range
                        }
                        : sort
                }
            ]);
        }
        else {
            // continuous scales
            const { bin } = fieldDef;
            if (extension_isBinning(bin)) {
                const binSignal = extension_getBinSignalName(model, fieldDef.field, bin);
                return extension_makeImplicit([
                    new extension_SignalRefWrapper(() => {
                        const signal = model.getSignalName(binSignal);
                        return `[${signal}.start, ${signal}.stop]`;
                    })
                ]);
            }
            else {
                return extension_makeImplicit([
                    {
                        data: model.requestDataName(dataSourceTypeForScaleDomain),
                        field: model.vgField(channel, {})
                    }
                ]);
            }
        }
    }
    else if (fieldDef.timeUnit && extension_util_contains(['time', 'utc'], scaleType)) {
        const fieldDef2 = encoding[extension_getSecondaryRangeChannel(channel)];
        if (extension_hasBandEnd(fieldDef, fieldDef2, markDef, config)) {
            const data = model.requestDataName(dataSourceTypeForScaleDomain);
            const bandPosition = extension_getBandPosition({ fieldDef, fieldDef2, markDef, config });
            const isRectWithOffset = extension_isRectBasedMark(mark) && bandPosition !== 0.5 && extension_isXorY(channel);
            return extension_makeImplicit([
                {
                    data,
                    field: model.vgField(channel, isRectWithOffset ? { suffix: extension_OFFSETTED_RECT_START_SUFFIX } : {})
                },
                {
                    data,
                    field: model.vgField(channel, { suffix: isRectWithOffset ? extension_OFFSETTED_RECT_END_SUFFIX : 'end' })
                }
            ]);
        }
    }
    if (sort) {
        return extension_makeImplicit([
            {
                // If sort by aggregation of a specified sort field, we need to use RAW table,
                // so we can aggregate values for the scale independently from the main aggregation.
                data: extension_util_isBoolean(sort)
                    ? model.requestDataName(dataSourceTypeForScaleDomain)
                    : model.requestDataName(extension_DataSourceType.Raw),
                field: model.vgField(channel),
                sort
            }
        ]);
    }
    else {
        return extension_makeImplicit([
            {
                data: model.requestDataName(dataSourceTypeForScaleDomain),
                field: model.vgField(channel)
            }
        ]);
    }
}
function extension_normalizeSortField(sort, isStackedMeasure) {
    const { op, field, order } = sort;
    return {
        // Apply default op
        op: op ?? (isStackedMeasure ? 'sum' : extension_DEFAULT_SORT_OP),
        // flatten nested fields
        ...(field ? { field: extension_replacePathInField(field) } : {}),
        ...(order ? { order } : {})
    };
}
function extension_parseSelectionDomain(model, channel) {
    const scale = model.component.scales[channel];
    const spec = model.specifiedScales[channel].domain;
    const bin = model.fieldDef(channel)?.bin;
    const domain = extension_isParameterDomain(spec) ? spec : undefined;
    const extent = extension_isBinParams(bin) && extension_isParameterExtent(bin.extent) ? bin.extent : undefined;
    if (domain || extent) {
        // As scale parsing occurs before selection parsing, we cannot set
        // domainRaw directly. So instead, we store the selectionExtent on
        // the scale component, and then add domainRaw during scale assembly.
        scale.set('selectionExtent', domain ?? extent, true);
    }
}
function extension_domainSort(model, channel, scaleType) {
    if (!extension_hasDiscreteDomain(scaleType)) {
        return undefined;
    }
    // save to cast as the only exception is the geojson type for shape, which would not generate a scale
    const fieldDef = model.fieldDef(channel);
    const sort = fieldDef.sort;
    // if the sort is specified with array, use the derived sort index field
    if (extension_isSortArray(sort)) {
        return {
            op: 'min',
            field: extension_sortArrayIndexField(fieldDef, channel),
            order: 'ascending'
        };
    }
    const { stack } = model;
    const stackDimensions = stack
        ? new Set([...stack.groupbyFields, ...stack.stackBy.map(s => s.fieldDef.field)])
        : undefined;
    // Sorted based on an aggregate calculation over a specified sort field (only for ordinal scale)
    if (extension_isSortField(sort)) {
        const isStackedMeasure = stack && !stackDimensions.has(sort.field);
        return extension_normalizeSortField(sort, isStackedMeasure);
    }
    else if (extension_isSortByEncoding(sort)) {
        const { encoding, order } = sort;
        const fieldDefToSortBy = model.fieldDef(encoding);
        const { aggregate, field } = fieldDefToSortBy;
        const isStackedMeasure = stack && !stackDimensions.has(field);
        if (extension_isArgminDef(aggregate) || extension_isArgmaxDef(aggregate)) {
            return extension_normalizeSortField({
                field: extension_vgField(fieldDefToSortBy),
                order
            }, isStackedMeasure);
        }
        else if (extension_isAggregateOp(aggregate) || !aggregate) {
            return extension_normalizeSortField({
                op: aggregate, // can't be argmin/argmax since we don't support them in encoding field def
                field,
                order
            }, isStackedMeasure);
        }
    }
    else if (sort === 'descending') {
        return {
            op: 'min',
            field: model.vgField(channel),
            order: 'descending'
        };
    }
    else if (extension_util_contains(['ascending', undefined /* default =ascending*/], sort)) {
        return true;
    }
    // sort == null
    return undefined;
}
/**
 * Determine if a scale can use unaggregated domain.
 * @return {Boolean} Returns true if all of the following conditions apply:
 * 1. `scale.domain` is `unaggregated`
 * 2. Aggregation function is not `count` or `sum`
 * 3. The scale is quantitative or time scale.
 */
function extension_canUseUnaggregatedDomain(fieldDef, scaleType) {
    const { aggregate, type } = fieldDef;
    if (!aggregate) {
        return {
            valid: false,
            reason: extension_unaggregateDomainHasNoEffectForRawField(fieldDef)
        };
    }
    if (extension_vega_util_module_isString(aggregate) && !extension_SHARED_DOMAIN_OPS.has(aggregate)) {
        return {
            valid: false,
            reason: extension_unaggregateDomainWithNonSharedDomainOp(aggregate)
        };
    }
    if (type === 'quantitative') {
        if (scaleType === 'log') {
            return {
                valid: false,
                reason: extension_unaggregatedDomainWithLogScale(fieldDef)
            };
        }
    }
    return { valid: true };
}
/**
 * Tie breaker for mergeValuesWithExplicit for domains. We concat the specified values.
 */
function extension_domainsTieBreaker(v1, v2, property, propertyOf) {
    if (v1.explicit && v2.explicit) {
        extension_log_warn(extension_mergeConflictingDomainProperty(property, propertyOf, v1.value, v2.value));
    }
    // If equal score, concat the domains so that we union them later.
    return { explicit: v1.explicit, value: [...v1.value, ...v2.value] };
}
/**
 * Converts an array of domains to a single Vega scale domain.
 */
function extension_mergeDomains(domains) {
    const uniqueDomains = extension_unique(domains.map(domain => {
        // ignore sort property when computing the unique domains
        if (extension_isDataRefDomain(domain)) {
            const { sort: _s, ...domainWithoutSort } = domain;
            return domainWithoutSort;
        }
        return domain;
    }), extension_util_hash);
    const sorts = extension_unique(domains
        .map(d => {
        if (extension_isDataRefDomain(d)) {
            const s = d.sort;
            if (s !== undefined && !extension_util_isBoolean(s)) {
                if ('op' in s && s.op === 'count') {
                    // let's make sure that if op is count, we don't use a field
                    delete s.field;
                }
                if (s.order === 'ascending') {
                    // drop order: ascending as it is the default
                    delete s.order;
                }
            }
            return s;
        }
        return undefined;
    })
        .filter(s => s !== undefined), extension_util_hash);
    if (uniqueDomains.length === 0) {
        return undefined;
    }
    else if (uniqueDomains.length === 1) {
        const domain = domains[0];
        if (extension_isDataRefDomain(domain) && sorts.length > 0) {
            let sort = sorts[0];
            if (sorts.length > 1) {
                extension_log_warn(extension_MORE_THAN_ONE_SORT);
                // Get sorts with non-default ops
                const filteredSorts = sorts.filter(s => extension_vega_util_module_isObject(s) && 'op' in s && s.op !== 'min');
                if (sorts.every(s => extension_vega_util_module_isObject(s) && 'op' in s) && filteredSorts.length === 1) {
                    sort = filteredSorts[0];
                }
                else {
                    sort = true;
                }
            }
            else {
                // Simplify domain sort by removing field and op when the field is the same as the domain field.
                if (extension_vega_util_module_isObject(sort) && 'field' in sort) {
                    const sortField = sort.field;
                    if (domain.field === sortField) {
                        sort = sort.order ? { order: sort.order } : true;
                    }
                }
            }
            return {
                ...domain,
                sort
            };
        }
        return domain;
    }
    // only keep sort properties that work with unioned domains
    const unionDomainSorts = extension_unique(sorts.map(s => {
        if (extension_util_isBoolean(s) || !('op' in s) || (extension_vega_util_module_isString(s.op) && extension_vega_util_module_has(extension_MULTIDOMAIN_SORT_OP_INDEX, s.op))) {
            return s;
        }
        extension_log_warn(extension_domainSortDropped(s));
        return true;
    }), extension_util_hash);
    let sort;
    if (unionDomainSorts.length === 1) {
        sort = unionDomainSorts[0];
    }
    else if (unionDomainSorts.length > 1) {
        extension_log_warn(extension_MORE_THAN_ONE_SORT);
        sort = true;
    }
    const allData = extension_unique(domains.map(d => {
        if (extension_isDataRefDomain(d)) {
            return d.data;
        }
        return null;
    }), x => x);
    if (allData.length === 1 && allData[0] !== null) {
        // create a union domain of different fields with a single data source
        const domain = {
            data: allData[0],
            fields: uniqueDomains.map(d => d.field),
            ...(sort ? { sort } : {})
        };
        return domain;
    }
    return { fields: uniqueDomains, ...(sort ? { sort } : {}) };
}
/**
 * Return a field if a scale uses a single field.
 * Return `undefined` otherwise.
 */
function extension_getFieldFromDomain(domain) {
    if (extension_isDataRefDomain(domain) && extension_vega_util_module_isString(domain.field)) {
        return domain.field;
    }
    else if (extension_isDataRefUnionedDomain(domain)) {
        let field;
        for (const nonUnionDomain of domain.fields) {
            if (extension_isDataRefDomain(nonUnionDomain) && extension_vega_util_module_isString(nonUnionDomain.field)) {
                if (!field) {
                    field = nonUnionDomain.field;
                }
                else if (field !== nonUnionDomain.field) {
                    extension_log_warn(extension_FACETED_INDEPENDENT_DIFFERENT_SOURCES);
                    return field;
                }
            }
        }
        extension_log_warn(extension_FACETED_INDEPENDENT_SAME_FIELDS_DIFFERENT_SOURCES);
        return field;
    }
    else if (extension_isFieldRefUnionDomain(domain)) {
        extension_log_warn(extension_FACETED_INDEPENDENT_SAME_SOURCE);
        const field = domain.fields[0];
        return extension_vega_util_module_isString(field) ? field : undefined;
    }
    return undefined;
}
function extension_assembleDomain(model, channel) {
    const scaleComponent = model.component.scales[channel];
    const domains = scaleComponent.get('domains').map((domain) => {
        // Correct references to data as the original domain's data was determined
        // in parseScale, which happens before parseData. Thus the original data
        // reference can be incorrect.
        if (extension_isDataRefDomain(domain)) {
            domain.data = model.lookupDataSource(domain.data);
        }
        return domain;
    });
    // domains is an array that has to be merged into a single vega domain
    return extension_mergeDomains(domains);
}
//# sourceMappingURL=domain.js.map
;// ../../node_modules/vega-lite/build/src/compile/scale/assemble.js







function extension_assembleScales(model) {
    if (extension_isLayerModel(model) || extension_isConcatModel(model)) {
        // For concat and layer, include scales of children too
        return model.children.reduce((scales, child) => {
            return scales.concat(extension_assembleScales(child));
        }, extension_assembleScalesForModel(model));
    }
    else {
        // For facet, child scales would not be included in the parent's scope.
        // For unit, there is no child.
        return extension_assembleScalesForModel(model);
    }
}
function extension_assembleScalesForModel(model) {
    return extension_util_keys(model.component.scales).reduce((scales, channel) => {
        const scaleComponent = model.component.scales[channel];
        if (scaleComponent.merged) {
            // Skipped merged scales
            return scales;
        }
        const scale = scaleComponent.combine();
        const { name, type, selectionExtent, domains: _d, range: _r, reverse, ...otherScaleProps } = scale;
        const range = extension_assembleScaleRange(scale.range, name, channel, model);
        const domain = extension_assembleDomain(model, channel);
        const domainRaw = selectionExtent
            ? extension_assembleSelectionScaleDomain(model, selectionExtent, scaleComponent, domain)
            : null;
        scales.push({
            name,
            type,
            ...(domain ? { domain } : {}),
            ...(domainRaw ? { domainRaw } : {}),
            range,
            ...(reverse !== undefined ? { reverse: reverse } : {}),
            ...otherScaleProps
        });
        return scales;
    }, []);
}
function extension_assembleScaleRange(scaleRange, scaleName, channel, model) {
    // add signals to x/y range
    if (extension_isXorY(channel)) {
        if (extension_isVgRangeStep(scaleRange)) {
            // For width/height step, use a signal created in layout assemble instead of a constant step.
            return {
                step: { signal: `${scaleName}_step` }
            };
        }
    }
    else if (extension_vega_util_module_isObject(scaleRange) && extension_isDataRefDomain(scaleRange)) {
        return {
            ...scaleRange,
            data: model.lookupDataSource(scaleRange.data)
        };
    }
    return scaleRange;
}
//# sourceMappingURL=assemble.js.map
;// ../../node_modules/vega-lite/build/src/compile/scale/component.js




class extension_ScaleComponent extends extension_Split {
    constructor(name, typeWithExplicit) {
        super({}, // no initial explicit property
        { name } // name as initial implicit property
        );
        this.merged = false;
        this.setWithExplicit('type', typeWithExplicit);
    }
    /**
     * Whether the scale definitely includes or not include zero in the domain
     */
    domainHasZero() {
        const scaleType = this.get('type');
        if (extension_util_contains([extension_ScaleType.LOG, extension_ScaleType.TIME, extension_ScaleType.UTC], scaleType)) {
            // Log scales cannot have zero.
            // Zero in time scale is arbitrary, and does not affect ratio.
            // (Time is an interval level of measurement, not ratio).
            // See https://en.wikipedia.org/wiki/Level_of_measurement for more info.
            return 'definitely-not';
        }
        const scaleZero = this.get('zero');
        if (scaleZero === true ||
            // If zero is undefined, linear/sqrt/pow scales have zero by default.
            (scaleZero === undefined && extension_util_contains([extension_ScaleType.LINEAR, extension_ScaleType.SQRT, extension_ScaleType.POW], scaleType))) {
            return 'definitely';
        }
        const domains = this.get('domains');
        if (domains.length > 0) {
            let hasExplicitDomainWithZero = false;
            let hasExplicitDomainWithoutZero = false;
            let hasDomainBasedOnField = false;
            for (const d of domains) {
                if (extension_vega_util_module_isArray(d)) {
                    const first = d[0];
                    const last = d[d.length - 1];
                    if (extension_vega_util_module_isNumber(first) && extension_vega_util_module_isNumber(last)) {
                        if (first <= 0 && last >= 0) {
                            hasExplicitDomainWithZero = true;
                            continue;
                        }
                        else {
                            hasExplicitDomainWithoutZero = true;
                            continue;
                        }
                    }
                }
                hasDomainBasedOnField = true;
            }
            if (hasExplicitDomainWithZero) {
                return 'definitely';
            }
            else if (hasExplicitDomainWithoutZero && !hasDomainBasedOnField) {
                return 'definitely-not';
            }
        }
        return 'maybe';
    }
}
//# sourceMappingURL=component.js.map
;// ../../node_modules/vega-lite/build/src/compile/scale/range.js



















const extension_RANGE_PROPERTIES = ['range', 'scheme'];
function extension_parseUnitScaleRange(model) {
    const localScaleComponents = model.component.scales;
    // use SCALE_CHANNELS instead of scales[channel] to ensure that x, y come first!
    for (const channel of extension_SCALE_CHANNELS) {
        const localScaleCmpt = localScaleComponents[channel];
        if (!localScaleCmpt) {
            continue;
        }
        const rangeWithExplicit = extension_parseRangeForChannel(channel, model);
        localScaleCmpt.setWithExplicit('range', rangeWithExplicit);
    }
}
function extension_getBinStepSignal(model, channel) {
    const fieldDef = model.fieldDef(channel);
    if (fieldDef?.bin) {
        const { bin, field } = fieldDef;
        const sizeType = extension_getSizeChannel(channel);
        const sizeSignal = model.getName(sizeType);
        if (extension_vega_util_module_isObject(bin) && bin.binned && bin.step !== undefined) {
            return new extension_SignalRefWrapper(() => {
                const scaleName = model.scaleName(channel);
                const binCount = `(domain("${scaleName}")[1] - domain("${scaleName}")[0]) / ${bin.step}`;
                return `${model.getSignalName(sizeSignal)} / (${binCount})`;
            });
        }
        else if (extension_isBinning(bin)) {
            const binSignal = extension_getBinSignalName(model, field, bin);
            // TODO: extract this to be range step signal
            return new extension_SignalRefWrapper(() => {
                const updatedName = model.getSignalName(binSignal);
                const binCount = `(${updatedName}.stop - ${updatedName}.start) / ${updatedName}.step`;
                return `${model.getSignalName(sizeSignal)} / (${binCount})`;
            });
        }
    }
    return undefined;
}
/**
 * Return mixins that includes one of the Vega range types (explicit range, range.step, range.scheme).
 */
function extension_parseRangeForChannel(channel, model) {
    const specifiedScale = model.specifiedScales[channel];
    const { size } = model;
    const mergedScaleCmpt = model.getScaleComponent(channel);
    const scaleType = mergedScaleCmpt.get('type');
    // Check if any of the range properties is specified.
    // If so, check if it is compatible and make sure that we only output one of the properties
    for (const property of extension_RANGE_PROPERTIES) {
        if (specifiedScale[property] !== undefined) {
            const supportedByScaleType = extension_scaleTypeSupportProperty(scaleType, property);
            const channelIncompatability = extension_channelScalePropertyIncompatability(channel, property);
            if (!supportedByScaleType) {
                extension_log_warn(extension_scalePropertyNotWorkWithScaleType(scaleType, property, channel));
            }
            else if (channelIncompatability) {
                // channel
                extension_log_warn(channelIncompatability);
            }
            else {
                switch (property) {
                    case 'range': {
                        const range = specifiedScale.range;
                        if (extension_vega_util_module_isArray(range)) {
                            if (extension_isXorY(channel)) {
                                return extension_makeExplicit(range.map(v => {
                                    if (v === 'width' || v === 'height') {
                                        // get signal for width/height
                                        // Just like default range logic below, we use SignalRefWrapper to account for potential merges and renames.
                                        const sizeSignal = model.getName(v);
                                        const getSignalName = model.getSignalName.bind(model);
                                        return extension_SignalRefWrapper.fromName(getSignalName, sizeSignal);
                                    }
                                    return v;
                                }));
                            }
                        }
                        else if (extension_vega_util_module_isObject(range)) {
                            return extension_makeExplicit({
                                data: model.requestDataName(extension_DataSourceType.Main),
                                field: range.field,
                                sort: { op: 'min', field: model.vgField(channel) }
                            });
                        }
                        return extension_makeExplicit(range);
                    }
                    case 'scheme':
                        return extension_makeExplicit(extension_parseScheme(specifiedScale[property]));
                }
            }
        }
    }
    const sizeChannel = channel === extension_channel_X || channel === 'xOffset' ? 'width' : 'height';
    const sizeValue = size[sizeChannel];
    if (extension_isStep(sizeValue)) {
        if (extension_isXorY(channel)) {
            if (extension_hasDiscreteDomain(scaleType)) {
                const step = extension_getPositionStep(sizeValue, model, channel);
                // Need to be explicit so layer with step wins over layer without step
                if (step) {
                    return extension_makeExplicit({ step });
                }
            }
            else {
                extension_log_warn(extension_stepDropped(sizeChannel));
            }
        }
        else if (extension_isXorYOffset(channel)) {
            const positionChannel = channel === extension_XOFFSET ? 'x' : 'y';
            const positionScaleCmpt = model.getScaleComponent(positionChannel);
            const positionScaleType = positionScaleCmpt.get('type');
            if (positionScaleType === 'band') {
                const step = extension_getOffsetStep(sizeValue, scaleType);
                if (step) {
                    return extension_makeExplicit(step);
                }
            }
        }
    }
    const { rangeMin, rangeMax } = specifiedScale;
    const d = extension_defaultRange(channel, model);
    if ((rangeMin !== undefined || rangeMax !== undefined) &&
        // it's ok to check just rangeMin's compatibility since rangeMin/rangeMax are the same
        extension_scaleTypeSupportProperty(scaleType, 'rangeMin') &&
        extension_vega_util_module_isArray(d) &&
        d.length === 2) {
        return extension_makeExplicit([rangeMin ?? d[0], rangeMax ?? d[1]]);
    }
    return extension_makeImplicit(d);
}
function extension_parseScheme(scheme) {
    if (extension_isExtendedScheme(scheme)) {
        return {
            scheme: scheme.name,
            ...extension_omit(scheme, ['name'])
        };
    }
    return { scheme };
}
function extension_fullWidthOrHeightRange(channel, model, scaleType, { center } = {}) {
    // If step is null, use zero to width or height.
    // Note that we use SignalRefWrapper to account for potential merges and renames.
    const sizeType = extension_getSizeChannel(channel);
    const sizeSignal = model.getName(sizeType);
    const getSignalName = model.getSignalName.bind(model);
    if (channel === extension_channel_Y && extension_hasContinuousDomain(scaleType)) {
        // For y continuous scale, we have to start from the height as the bottom part has the max value.
        return center
            ? [
                extension_SignalRefWrapper.fromName(name => `${getSignalName(name)}/2`, sizeSignal),
                extension_SignalRefWrapper.fromName(name => `-${getSignalName(name)}/2`, sizeSignal)
            ]
            : [extension_SignalRefWrapper.fromName(getSignalName, sizeSignal), 0];
    }
    else {
        return center
            ? [
                extension_SignalRefWrapper.fromName(name => `-${getSignalName(name)}/2`, sizeSignal),
                extension_SignalRefWrapper.fromName(name => `${getSignalName(name)}/2`, sizeSignal)
            ]
            : [0, extension_SignalRefWrapper.fromName(getSignalName, sizeSignal)];
    }
}
function extension_defaultRange(channel, model) {
    const { size, config, mark, encoding } = model;
    const { type } = extension_getFieldOrDatumDef(encoding[channel]);
    const mergedScaleCmpt = model.getScaleComponent(channel);
    const scaleType = mergedScaleCmpt.get('type');
    const { domain, domainMid } = model.specifiedScales[channel];
    switch (channel) {
        case extension_channel_X:
        case extension_channel_Y: {
            // If there is no explicit width/height for discrete x/y scales
            if (extension_util_contains(['point', 'band'], scaleType)) {
                const positionSize = extension_getDiscretePositionSize(channel, size, config.view);
                if (extension_isStep(positionSize)) {
                    const step = extension_getPositionStep(positionSize, model, channel);
                    return { step };
                }
            }
            return extension_fullWidthOrHeightRange(channel, model, scaleType);
        }
        case extension_XOFFSET:
        case extension_YOFFSET:
            return extension_getOffsetRange(channel, model, scaleType);
        case extension_channel_SIZE: {
            // TODO: support custom rangeMin, rangeMax
            const rangeMin = extension_sizeRangeMin(mark, config);
            const rangeMax = extension_sizeRangeMax(mark, size, model, config);
            if (extension_isContinuousToDiscrete(scaleType)) {
                return extension_range_interpolateRange(rangeMin, rangeMax, extension_defaultContinuousToDiscreteCount(scaleType, config, domain, channel));
            }
            else {
                return [rangeMin, rangeMax];
            }
        }
        case extension_THETA:
            return [0, Math.PI * 2];
        case extension_ANGLE:
            // TODO: add config.scale.min/maxAngleDegree (for point and text) and config.scale.min/maxAngleRadian (for arc) once we add arc marks.
            // (It's weird to add just config.scale.min/maxAngleDegree for now)
            return [0, 360];
        case extension_RADIUS: {
            // max radius = half od min(width,height)
            return [
                0,
                new extension_SignalRefWrapper(() => {
                    const w = model.getSignalName(extension_isFacetModel(model.parent) ? 'child_width' : 'width');
                    const h = model.getSignalName(extension_isFacetModel(model.parent) ? 'child_height' : 'height');
                    return `min(${w},${h})/2`;
                })
            ];
        }
        case extension_TIME: {
            // if (scaleType === 'band') {
            return { step: 1000 / config.scale.framesPerSecond };
            // }
            // return [0, config.scale.animationDuration * 1000]; // TODO(jzong): uncomment for linear scales when interpolation is implemented
        }
        case extension_STROKEWIDTH:
            // TODO: support custom rangeMin, rangeMax
            return [config.scale.minStrokeWidth, config.scale.maxStrokeWidth];
        case extension_STROKEDASH:
            return [
                // TODO: add this to Vega's config.range?
                [1, 0],
                [4, 2],
                [2, 1],
                [1, 1],
                [1, 2, 4, 2]
            ];
        case extension_SHAPE:
            return 'symbol';
        case extension_COLOR:
        case extension_FILL:
        case extension_STROKE:
            if (scaleType === 'ordinal') {
                // Only nominal data uses ordinal scale by default
                return type === 'nominal' ? 'category' : 'ordinal';
            }
            else {
                if (domainMid !== undefined) {
                    return 'diverging';
                }
                else {
                    return mark === 'rect' || mark === 'geoshape' ? 'heatmap' : 'ramp';
                }
            }
        case extension_OPACITY:
        case extension_FILLOPACITY:
        case extension_STROKEOPACITY:
            // TODO: support custom rangeMin, rangeMax
            return [config.scale.minOpacity, config.scale.maxOpacity];
    }
}
function extension_getPositionStep(step, model, channel) {
    const { encoding } = model;
    const mergedScaleCmpt = model.getScaleComponent(channel);
    const offsetChannel = extension_getOffsetScaleChannel(channel);
    const offsetDef = encoding[offsetChannel];
    const stepFor = extension_getStepFor({ step, offsetIsDiscrete: extension_isFieldOrDatumDef(offsetDef) && extension_type_isDiscrete(offsetDef.type) });
    if (stepFor === 'offset' && extension_channelHasFieldOrDatum(encoding, offsetChannel)) {
        const offsetScaleCmpt = model.getScaleComponent(offsetChannel);
        const offsetScaleName = model.scaleName(offsetChannel);
        let stepCount = `domain('${offsetScaleName}').length`;
        if (offsetScaleCmpt.get('type') === 'band') {
            const offsetPaddingInner = offsetScaleCmpt.get('paddingInner') ?? offsetScaleCmpt.get('padding') ?? 0;
            const offsetPaddingOuter = offsetScaleCmpt.get('paddingOuter') ?? offsetScaleCmpt.get('padding') ?? 0;
            stepCount = `bandspace(${stepCount}, ${offsetPaddingInner}, ${offsetPaddingOuter})`;
        }
        const paddingInner = mergedScaleCmpt.get('paddingInner') ?? mergedScaleCmpt.get('padding');
        return {
            signal: `${step.step} * ${stepCount} / (1-${extension_exprFromSignalRefOrValue(paddingInner)})`
        };
    }
    else {
        return step.step;
    }
}
function extension_getOffsetStep(step, offsetScaleType) {
    const stepFor = extension_getStepFor({ step, offsetIsDiscrete: extension_hasDiscreteDomain(offsetScaleType) });
    if (stepFor === 'offset') {
        return { step: step.step };
    }
    return undefined;
}
function extension_getOffsetRange(channel, model, offsetScaleType) {
    const positionChannel = channel === extension_XOFFSET ? 'x' : 'y';
    const positionScaleCmpt = model.getScaleComponent(positionChannel);
    if (!positionScaleCmpt) {
        return extension_fullWidthOrHeightRange(positionChannel, model, offsetScaleType, { center: true });
    }
    const positionScaleType = positionScaleCmpt.get('type');
    const positionScaleName = model.scaleName(positionChannel);
    const { markDef, config } = model;
    if (positionScaleType === 'band') {
        const size = extension_getDiscretePositionSize(positionChannel, model.size, model.config.view);
        if (extension_isStep(size)) {
            // step is for offset
            const step = extension_getOffsetStep(size, offsetScaleType);
            if (step) {
                return step;
            }
        }
        // otherwise use the position
        return [0, { signal: `bandwidth('${positionScaleName}')` }];
    }
    else {
        // continuous scale
        const positionDef = model.encoding[positionChannel];
        if (extension_isFieldDef(positionDef) && positionDef.timeUnit) {
            const duration = extension_durationExpr(positionDef.timeUnit, expr => `scale('${positionScaleName}', ${expr})`);
            const padding = model.config.scale.bandWithNestedOffsetPaddingInner;
            const bandPositionOffset = extension_getBandPosition({
                fieldDef: positionDef,
                markDef,
                config
            }) - 0.5;
            const bandPositionOffsetExpr = bandPositionOffset !== 0 ? ` + ${bandPositionOffset}` : '';
            if (padding) {
                const startRatio = extension_isSignalRef(padding)
                    ? `${padding.signal}/2` + bandPositionOffsetExpr
                    : `${padding / 2 + bandPositionOffset}`;
                const endRatio = extension_isSignalRef(padding)
                    ? `(1 - ${padding.signal}/2)` + bandPositionOffsetExpr
                    : `${1 - padding / 2 + bandPositionOffset}`;
                return [{ signal: `${startRatio} * (${duration})` }, { signal: `${endRatio} * (${duration})` }];
            }
            return [0, { signal: duration }];
        }
        return extension_never(`Cannot use ${channel} scale if ${positionChannel} scale is not discrete.`);
    }
}
function extension_getDiscretePositionSize(channel, size, viewConfig) {
    const sizeChannel = channel === extension_channel_X ? 'width' : 'height';
    const sizeValue = size[sizeChannel];
    if (sizeValue) {
        return sizeValue;
    }
    return extension_getViewConfigDiscreteSize(viewConfig, sizeChannel);
}
function extension_defaultContinuousToDiscreteCount(scaleType, config, domain, channel) {
    switch (scaleType) {
        case 'quantile':
            return config.scale.quantileCount;
        case 'quantize':
            return config.scale.quantizeCount;
        case 'threshold':
            if (domain !== undefined && extension_vega_util_module_isArray(domain)) {
                return domain.length + 1;
            }
            else {
                extension_log_warn(extension_domainRequiredForThresholdScale(channel));
                // default threshold boundaries for threshold scale since domain has cardinality of 2
                return 3;
            }
    }
}
/**
 * Returns the linear interpolation of the range according to the cardinality
 *
 * @param rangeMin start of the range
 * @param rangeMax end of the range
 * @param cardinality number of values in the output range
 */
function extension_range_interpolateRange(rangeMin, rangeMax, cardinality) {
    // always return a signal since it's better to compute the sequence in Vega later
    const f = () => {
        const rMax = extension_signalOrStringValue(rangeMax);
        const rMin = extension_signalOrStringValue(rangeMin);
        const step = `(${rMax} - ${rMin}) / (${cardinality} - 1)`;
        return `sequence(${rMin}, ${rMax} + ${step}, ${step})`;
    };
    if (extension_isSignalRef(rangeMax)) {
        return new extension_SignalRefWrapper(f);
    }
    else {
        return { signal: f() };
    }
}
function extension_sizeRangeMin(mark, config) {
    switch (mark) {
        case 'bar':
        case 'tick':
            return config.scale.minBandSize;
        case 'line':
        case 'trail':
        case 'rule':
            return config.scale.minStrokeWidth;
        case 'text':
            return config.scale.minFontSize;
        case 'point':
        case 'square':
        case 'circle':
            return config.scale.minSize;
    }
    /* istanbul ignore next: should never reach here */
    // sizeRangeMin not implemented for the mark
    throw new Error(extension_incompatibleChannel('size', mark));
}
const extension_MAX_SIZE_RANGE_STEP_RATIO = 0.95;
function extension_sizeRangeMax(mark, size, model, config) {
    const xyStepSignals = {
        x: extension_getBinStepSignal(model, 'x'),
        y: extension_getBinStepSignal(model, 'y')
    };
    switch (mark) {
        case 'bar':
        case 'tick': {
            if (config.scale.maxBandSize !== undefined) {
                return config.scale.maxBandSize;
            }
            const min = extension_minXYStep(size, xyStepSignals, config.view);
            if (extension_vega_util_module_isNumber(min)) {
                return min - 1;
            }
            else {
                return new extension_SignalRefWrapper(() => `${min.signal} - 1`);
            }
        }
        case 'line':
        case 'trail':
        case 'rule':
            return config.scale.maxStrokeWidth;
        case 'text':
            return config.scale.maxFontSize;
        case 'point':
        case 'square':
        case 'circle': {
            if (config.scale.maxSize) {
                return config.scale.maxSize;
            }
            const pointStep = extension_minXYStep(size, xyStepSignals, config.view);
            if (extension_vega_util_module_isNumber(pointStep)) {
                return Math.pow(extension_MAX_SIZE_RANGE_STEP_RATIO * pointStep, 2);
            }
            else {
                return new extension_SignalRefWrapper(() => `pow(${extension_MAX_SIZE_RANGE_STEP_RATIO} * ${pointStep.signal}, 2)`);
            }
        }
    }
    /* istanbul ignore next: should never reach here */
    // sizeRangeMax not implemented for the mark
    throw new Error(extension_incompatibleChannel('size', mark));
}
/**
 * @returns {number} Range step of x or y or minimum between the two if both are ordinal scale.
 */
function extension_minXYStep(size, xyStepSignals, viewConfig) {
    const widthStep = extension_isStep(size.width) ? size.width.step : extension_getViewConfigDiscreteStep(viewConfig, 'width');
    const heightStep = extension_isStep(size.height) ? size.height.step : extension_getViewConfigDiscreteStep(viewConfig, 'height');
    if (xyStepSignals.x || xyStepSignals.y) {
        return new extension_SignalRefWrapper(() => {
            const exprs = [
                xyStepSignals.x ? xyStepSignals.x.signal : widthStep,
                xyStepSignals.y ? xyStepSignals.y.signal : heightStep
            ];
            return `min(${exprs.join(', ')})`;
        });
    }
    return Math.min(widthStep, heightStep);
}
//# sourceMappingURL=range.js.map
;// ../../node_modules/vega-lite/build/src/compile/scale/properties.js
















function extension_parseScaleProperty(model, property) {
    if (extension_isUnitModel(model)) {
        extension_parseUnitScaleProperty(model, property);
    }
    else {
        extension_parseNonUnitScaleProperty(model, property);
    }
}
function extension_parseUnitScaleProperty(model, property) {
    const localScaleComponents = model.component.scales;
    const { config, encoding, markDef, specifiedScales } = model;
    for (const channel of extension_util_keys(localScaleComponents)) {
        const specifiedScale = specifiedScales[channel];
        const localScaleCmpt = localScaleComponents[channel];
        const mergedScaleCmpt = model.getScaleComponent(channel);
        const fieldOrDatumDef = extension_getFieldOrDatumDef(encoding[channel]);
        const specifiedValue = specifiedScale[property];
        const scaleType = mergedScaleCmpt.get('type');
        const scalePadding = mergedScaleCmpt.get('padding');
        const scalePaddingInner = mergedScaleCmpt.get('paddingInner');
        const supportedByScaleType = extension_scaleTypeSupportProperty(scaleType, property);
        const channelIncompatability = extension_channelScalePropertyIncompatability(channel, property);
        if (specifiedValue !== undefined) {
            // If there is a specified value, check if it is compatible with scale type and channel
            if (!supportedByScaleType) {
                extension_log_warn(extension_scalePropertyNotWorkWithScaleType(scaleType, property, channel));
            }
            else if (channelIncompatability) {
                // channel
                extension_log_warn(channelIncompatability);
            }
        }
        if (supportedByScaleType && channelIncompatability === undefined) {
            if (specifiedValue !== undefined) {
                const timeUnit = fieldOrDatumDef.timeUnit;
                const type = fieldOrDatumDef.type;
                switch (property) {
                    // domainMax/Min to signal if the value is a datetime object
                    case 'domainMax':
                    case 'domainMin':
                        if (extension_isDateTime(specifiedScale[property]) || type === 'temporal' || timeUnit) {
                            localScaleCmpt.set(property, { signal: extension_valueExpr(specifiedScale[property], { type, timeUnit }) }, true);
                        }
                        else {
                            localScaleCmpt.set(property, specifiedScale[property], true);
                        }
                        break;
                    default:
                        localScaleCmpt.copyKeyFromObject(property, specifiedScale);
                }
            }
            else {
                const value = extension_util_hasProperty(extension_scaleRules, property)
                    ? extension_scaleRules[property]({
                        model,
                        channel,
                        fieldOrDatumDef,
                        scaleType,
                        scalePadding,
                        scalePaddingInner,
                        domain: specifiedScale.domain,
                        domainMin: specifiedScale.domainMin,
                        domainMax: specifiedScale.domainMax,
                        markDef,
                        config,
                        hasNestedOffsetScale: extension_channelHasNestedOffsetScale(encoding, channel),
                        hasSecondaryRangeChannel: !!encoding[extension_getSecondaryRangeChannel(channel)]
                    })
                    : config.scale[property];
                if (value !== undefined) {
                    localScaleCmpt.set(property, value, false);
                }
            }
        }
    }
}
const extension_scaleRules = {
    bins: ({ model, fieldOrDatumDef }) => (extension_isFieldDef(fieldOrDatumDef) ? extension_properties_bins(model, fieldOrDatumDef) : undefined),
    interpolate: ({ channel, fieldOrDatumDef }) => extension_properties_interpolate(channel, fieldOrDatumDef.type),
    nice: ({ scaleType, channel, domain, domainMin, domainMax, fieldOrDatumDef }) => extension_properties_nice(scaleType, channel, domain, domainMin, domainMax, fieldOrDatumDef),
    padding: ({ channel, scaleType, fieldOrDatumDef, markDef, config }) => extension_properties_padding(channel, scaleType, config.scale, fieldOrDatumDef, markDef, config.bar),
    paddingInner: ({ scalePadding, channel, markDef, scaleType, config, hasNestedOffsetScale }) => extension_paddingInner(scalePadding, channel, markDef.type, scaleType, config.scale, hasNestedOffsetScale),
    paddingOuter: ({ scalePadding, channel, scaleType, scalePaddingInner, config, hasNestedOffsetScale }) => extension_paddingOuter(scalePadding, channel, scaleType, scalePaddingInner, config.scale, hasNestedOffsetScale),
    reverse: ({ fieldOrDatumDef, scaleType, channel, config }) => {
        const sort = extension_isFieldDef(fieldOrDatumDef) ? fieldOrDatumDef.sort : undefined;
        return extension_properties_reverse(scaleType, sort, channel, config.scale);
    },
    zero: ({ channel, fieldOrDatumDef, domain, markDef, scaleType, config, hasSecondaryRangeChannel }) => extension_properties_zero(channel, fieldOrDatumDef, domain, markDef, scaleType, config.scale, hasSecondaryRangeChannel)
};
// This method is here rather than in range.ts to avoid circular dependency.
function extension_properties_parseScaleRange(model) {
    if (extension_isUnitModel(model)) {
        extension_parseUnitScaleRange(model);
    }
    else {
        extension_parseNonUnitScaleProperty(model, 'range');
    }
}
function extension_parseNonUnitScaleProperty(model, property) {
    const localScaleComponents = model.component.scales;
    for (const child of model.children) {
        if (property === 'range') {
            extension_properties_parseScaleRange(child);
        }
        else {
            extension_parseScaleProperty(child, property);
        }
    }
    for (const channel of extension_util_keys(localScaleComponents)) {
        let valueWithExplicit;
        for (const child of model.children) {
            const childComponent = child.component.scales[channel];
            if (childComponent) {
                const childValueWithExplicit = childComponent.getWithExplicit(property);
                valueWithExplicit = extension_mergeValuesWithExplicit(valueWithExplicit, childValueWithExplicit, property, 'scale', extension_tieBreakByComparing((v1, v2) => {
                    switch (property) {
                        case 'range':
                            // For step, prefer larger step
                            if (v1.step && v2.step) {
                                return v1.step - v2.step;
                            }
                            return 0;
                        // TODO: precedence rule for other properties
                    }
                    return 0;
                }));
            }
        }
        localScaleComponents[channel].setWithExplicit(property, valueWithExplicit);
    }
}
function extension_properties_bins(model, fieldDef) {
    const bin = fieldDef.bin;
    if (extension_isBinning(bin)) {
        const binSignal = extension_getBinSignalName(model, fieldDef.field, bin);
        return new extension_SignalRefWrapper(() => {
            return model.getSignalName(binSignal);
        });
    }
    else if (extension_isBinned(bin) && extension_isBinParams(bin) && bin.step !== undefined) {
        // start and stop will be determined from the scale domain
        return {
            step: bin.step
        };
    }
    return undefined;
}
function extension_properties_interpolate(channel, type) {
    if (extension_util_contains([extension_COLOR, extension_FILL, extension_STROKE], channel) && type !== 'nominal') {
        return 'hcl';
    }
    return undefined;
}
function extension_properties_nice(scaleType, channel, specifiedDomain, domainMin, domainMax, fieldOrDatumDef) {
    if (extension_getFieldDef(fieldOrDatumDef)?.bin ||
        extension_vega_util_module_isArray(specifiedDomain) ||
        domainMax != null ||
        domainMin != null ||
        extension_util_contains([extension_ScaleType.TIME, extension_ScaleType.UTC], scaleType)) {
        return undefined;
    }
    return extension_isXorY(channel) ? true : undefined;
}
function extension_properties_padding(channel, scaleType, scaleConfig, fieldOrDatumDef, markDef, barConfig) {
    if (extension_isXorY(channel)) {
        if (extension_isContinuousToContinuous(scaleType)) {
            if (scaleConfig.continuousPadding !== undefined) {
                return scaleConfig.continuousPadding;
            }
            const { type, orient } = markDef;
            if (type === 'bar' && !(extension_isFieldDef(fieldOrDatumDef) && (fieldOrDatumDef.bin || fieldOrDatumDef.timeUnit))) {
                if ((orient === 'vertical' && channel === 'x') || (orient === 'horizontal' && channel === 'y')) {
                    return barConfig.continuousBandSize;
                }
            }
        }
        if (scaleType === extension_ScaleType.POINT) {
            return scaleConfig.pointPadding;
        }
    }
    return undefined;
}
function extension_paddingInner(paddingValue, channel, mark, scaleType, scaleConfig, hasNestedOffsetScale = false) {
    if (paddingValue !== undefined) {
        // If user has already manually specified "padding", no need to add default paddingInner.
        return undefined;
    }
    if (extension_isXorY(channel)) {
        // Padding is only set for X and Y by default.
        // Basically it doesn't make sense to add padding for color and size.
        // paddingOuter would only be called if it's a band scale, just return the default for bandScale.
        const { bandPaddingInner, barBandPaddingInner, rectBandPaddingInner, tickBandPaddingInner, bandWithNestedOffsetPaddingInner } = scaleConfig;
        if (hasNestedOffsetScale) {
            return bandWithNestedOffsetPaddingInner;
        }
        return extension_getFirstDefined(bandPaddingInner, mark === 'bar' ? barBandPaddingInner : mark === 'tick' ? tickBandPaddingInner : rectBandPaddingInner);
    }
    else if (extension_isXorYOffset(channel)) {
        if (scaleType === extension_ScaleType.BAND) {
            return scaleConfig.offsetBandPaddingInner;
        }
    }
    return undefined;
}
function extension_paddingOuter(paddingValue, channel, scaleType, paddingInnerValue, scaleConfig, hasNestedOffsetScale = false) {
    if (paddingValue !== undefined) {
        // If user has already manually specified "padding", no need to add default paddingOuter.
        return undefined;
    }
    if (extension_isXorY(channel)) {
        const { bandPaddingOuter, bandWithNestedOffsetPaddingOuter } = scaleConfig;
        if (hasNestedOffsetScale) {
            return bandWithNestedOffsetPaddingOuter;
        }
        // Padding is only set for X and Y by default.
        // Basically it doesn't make sense to add padding for color and size.
        if (scaleType === extension_ScaleType.BAND) {
            return extension_getFirstDefined(bandPaddingOuter, 
            /* By default, paddingOuter is paddingInner / 2. The reason is that
              size (width/height) = step * (cardinality - paddingInner + 2 * paddingOuter).
              and we want the width/height to be integer by default.
              Note that step (by default) and cardinality are integers.) */
            extension_isSignalRef(paddingInnerValue) ? { signal: `${paddingInnerValue.signal}/2` } : paddingInnerValue / 2);
        }
    }
    else if (extension_isXorYOffset(channel)) {
        if (scaleType === extension_ScaleType.POINT) {
            return 0.5; // so the point positions align with centers of band scales.
        }
        else if (scaleType === extension_ScaleType.BAND) {
            return scaleConfig.offsetBandPaddingOuter;
        }
    }
    return undefined;
}
function extension_properties_reverse(scaleType, sort, channel, scaleConfig) {
    if (channel === 'x' && scaleConfig.xReverse !== undefined) {
        if (extension_hasContinuousDomain(scaleType) && sort === 'descending') {
            if (extension_isSignalRef(scaleConfig.xReverse)) {
                return { signal: `!${scaleConfig.xReverse.signal}` };
            }
            else {
                return !scaleConfig.xReverse;
            }
        }
        return scaleConfig.xReverse;
    }
    if (extension_hasContinuousDomain(scaleType) && sort === 'descending') {
        // For continuous domain scales, Vega does not support domain sort.
        // Thus, we reverse range instead if sort is descending
        return true;
    }
    return undefined;
}
function extension_properties_zero(channel, fieldDef, specifiedDomain, markDef, scaleType, scaleConfig, hasSecondaryRangeChannel) {
    // If users explicitly provide a domain, we should not augment zero as that will be unexpected.
    const hasCustomDomain = !!specifiedDomain && specifiedDomain !== 'unaggregated';
    if (hasCustomDomain) {
        if (extension_hasContinuousDomain(scaleType)) {
            if (extension_vega_util_module_isArray(specifiedDomain)) {
                const first = specifiedDomain[0];
                const last = specifiedDomain[specifiedDomain.length - 1];
                if (extension_vega_util_module_isNumber(first) && first <= 0 && extension_vega_util_module_isNumber(last) && last >= 0) {
                    // if the domain includes zero, make zero remain true
                    return true;
                }
            }
            return false;
        }
    }
    // If there is no custom domain, return configZero value (=`true` as default) only for the following cases:
    // 1) using quantitative field with size
    // While this can be either ratio or interval fields, our assumption is that
    // ratio are more common. However, if the scaleType is discretizing scale, we want to return
    // false so that range doesn't start at zero
    if (channel === 'size' && fieldDef.type === 'quantitative' && !extension_isContinuousToDiscrete(scaleType)) {
        return true;
    }
    // 2) non-binned, quantitative x-scale or y-scale
    // (For binning, we should not include zero by default because binning are calculated without zero.)
    // (For area/bar charts with ratio scale chart, we should always include zero.)
    if (!(extension_isFieldDef(fieldDef) && fieldDef.bin) &&
        extension_util_contains([...extension_POSITION_SCALE_CHANNELS, ...extension_POLAR_POSITION_SCALE_CHANNELS], channel)) {
        const { orient, type } = markDef;
        if (extension_util_contains(['bar', 'area', 'line', 'trail'], type)) {
            if ((orient === 'horizontal' && channel === 'y') || (orient === 'vertical' && channel === 'x')) {
                return false;
            }
        }
        if (extension_util_contains(['bar', 'area'], type) && !hasSecondaryRangeChannel) {
            return true;
        }
        return scaleConfig?.zero;
    }
    return false;
}
//# sourceMappingURL=properties.js.map
;// ../../node_modules/vega-lite/build/src/compile/scale/type.js









/**
 * Determine if there is a specified scale type and if it is appropriate,
 * or determine default type if type is unspecified or inappropriate.
 */
// NOTE: CompassQL uses this method.
function extension_scaleType(specifiedScale, channel, fieldDef, mark, hasNestedOffsetScale = false) {
    const defaultScaleType = extension_type_defaultType(channel, fieldDef, mark, hasNestedOffsetScale);
    const { type } = specifiedScale;
    if (!extension_isScaleChannel(channel)) {
        // There is no scale for these channels
        return null;
    }
    if (type !== undefined) {
        // Check if explicitly specified scale type is supported by the channel
        if (!extension_channelSupportScaleType(channel, type)) {
            extension_log_warn(extension_scaleTypeNotWorkWithChannel(channel, type, defaultScaleType));
            return defaultScaleType;
        }
        // Check if explicitly specified scale type is supported by the data type
        if (extension_isFieldDef(fieldDef) && !extension_scaleTypeSupportDataType(type, fieldDef.type)) {
            extension_log_warn(extension_scaleTypeNotWorkWithFieldDef(type, defaultScaleType));
            return defaultScaleType;
        }
        return type;
    }
    return defaultScaleType;
}
/**
 * Determine appropriate default scale type.
 */
// NOTE: Voyager uses this method.
function extension_type_defaultType(channel, fieldDef, mark, hasNestedOffsetScale) {
    switch (fieldDef.type) {
        case 'nominal':
        case 'ordinal': {
            if (extension_isColorChannel(channel) || extension_rangeType(channel) === 'discrete') {
                if (channel === 'shape' && fieldDef.type === 'ordinal') {
                    extension_log_warn(extension_discreteChannelCannotEncode(channel, 'ordinal'));
                }
                return 'ordinal';
            }
            if (extension_isTime(channel)) {
                return 'band';
            }
            if (extension_isXorY(channel) || extension_isXorYOffset(channel)) {
                if (extension_util_contains(['rect', 'bar', 'image', 'rule', 'tick'], mark.type)) {
                    // The rect/bar/tick mark should fit into a band.
                    // For rule, using band scale to make rule align with axis ticks better https://github.com/vega/vega-lite/issues/3429
                    return 'band';
                }
                if (hasNestedOffsetScale) {
                    // If there is a nested offset scale, then there is a "band" for the span of the nested scale.
                    return 'band';
                }
            }
            else if (mark.type === 'arc' && channel in extension_POLAR_POSITION_SCALE_CHANNEL_INDEX) {
                return 'band';
            }
            const dimensionSize = mark[extension_getSizeChannel(channel)];
            if (extension_isRelativeBandSize(dimensionSize)) {
                return 'band';
            }
            if (extension_isPositionFieldOrDatumDef(fieldDef) && fieldDef.axis?.tickBand) {
                return 'band';
            }
            // Otherwise, use ordinal point scale so we can easily get center positions of the marks.
            return 'point';
        }
        case 'temporal':
            if (extension_isColorChannel(channel)) {
                return 'time';
            }
            else if (extension_rangeType(channel) === 'discrete') {
                extension_log_warn(extension_discreteChannelCannotEncode(channel, 'temporal'));
                // TODO: consider using quantize (equivalent to binning) once we have it
                return 'ordinal';
            }
            else if (extension_isFieldDef(fieldDef) && fieldDef.timeUnit && extension_normalizeTimeUnit(fieldDef.timeUnit).utc) {
                return 'utc';
            }
            else if (extension_isTime(channel)) {
                // return 'linear';
                return 'band'; // TODO(jzong): when interpolation is implemented, this should be 'linear'
            }
            return 'time';
        case 'quantitative':
            if (extension_isColorChannel(channel)) {
                if (extension_isFieldDef(fieldDef) && extension_isBinning(fieldDef.bin)) {
                    return 'bin-ordinal';
                }
                return 'linear';
            }
            else if (extension_rangeType(channel) === 'discrete') {
                extension_log_warn(extension_discreteChannelCannotEncode(channel, 'quantitative'));
                // TODO: consider using quantize (equivalent to binning) once we have it
                return 'ordinal';
            }
            else if (extension_isTime(channel)) {
                // return 'linear';
                return 'band'; // TODO(jzong): when interpolation is implemented, this should be 'linear'
            }
            return 'linear';
        case 'geojson':
            return undefined;
    }
    /* istanbul ignore next: should never reach this */
    throw new Error(extension_invalidFieldType(fieldDef.type));
}
//# sourceMappingURL=type.js.map
;// ../../node_modules/vega-lite/build/src/compile/scale/parse.js














function extension_parseScales(model, { ignoreRange } = {}) {
    extension_parseScaleCore(model);
    extension_domain_parseScaleDomain(model);
    for (const prop of extension_NON_TYPE_DOMAIN_RANGE_VEGA_SCALE_PROPERTIES) {
        extension_parseScaleProperty(model, prop);
    }
    if (!ignoreRange) {
        // range depends on zero
        extension_properties_parseScaleRange(model);
    }
}
function extension_parseScaleCore(model) {
    if (extension_isUnitModel(model)) {
        model.component.scales = extension_parseUnitScaleCore(model);
    }
    else {
        model.component.scales = extension_parseNonUnitScaleCore(model);
    }
}
/**
 * Parse scales for all channels of a model.
 */
function extension_parseUnitScaleCore(model) {
    const { encoding, mark, markDef } = model;
    const scaleComponents = {};
    for (const channel of extension_SCALE_CHANNELS) {
        const fieldOrDatumDef = extension_getFieldOrDatumDef(encoding[channel]); // must be typed def to have scale
        // Don't generate scale for shape of geoshape
        if (fieldOrDatumDef && mark === extension_GEOSHAPE && channel === extension_SHAPE && fieldOrDatumDef.type === extension_GEOJSON) {
            continue;
        }
        let specifiedScale = fieldOrDatumDef && fieldOrDatumDef.scale;
        if (fieldOrDatumDef && specifiedScale !== null && specifiedScale !== false) {
            specifiedScale ?? (specifiedScale = {});
            const hasNestedOffsetScale = extension_channelHasNestedOffsetScale(encoding, channel);
            const sType = extension_scaleType(specifiedScale, channel, fieldOrDatumDef, markDef, hasNestedOffsetScale);
            scaleComponents[channel] = new extension_ScaleComponent(model.scaleName(`${channel}`, true), {
                value: sType,
                explicit: specifiedScale.type === sType
            });
        }
    }
    return scaleComponents;
}
const extension_scaleTypeTieBreaker = extension_tieBreakByComparing((st1, st2) => extension_scaleTypePrecedence(st1) - extension_scaleTypePrecedence(st2));
function extension_parseNonUnitScaleCore(model) {
    var _a;
    const scaleComponents = (model.component.scales = {});
    const scaleTypeWithExplicitIndex = {};
    const resolve = model.component.resolve;
    // Parse each child scale and determine if a particular channel can be merged.
    for (const child of model.children) {
        extension_parseScaleCore(child);
        // Instead of always merging right away -- check if it is compatible to merge first!
        for (const channel of extension_util_keys(child.component.scales)) {
            // if resolve is undefined, set default first
            (_a = resolve.scale)[channel] ?? (_a[channel] = extension_defaultScaleResolve(channel, model));
            if (resolve.scale[channel] === 'shared') {
                const explicitScaleType = scaleTypeWithExplicitIndex[channel];
                const childScaleType = child.component.scales[channel].getWithExplicit('type');
                if (explicitScaleType) {
                    if (extension_scaleCompatible(explicitScaleType.value, childScaleType.value)) {
                        // merge scale component if type are compatible
                        scaleTypeWithExplicitIndex[channel] = extension_mergeValuesWithExplicit(explicitScaleType, childScaleType, 'type', 'scale', extension_scaleTypeTieBreaker);
                    }
                    else {
                        // Otherwise, update conflicting channel to be independent
                        resolve.scale[channel] = 'independent';
                        // Remove from the index so they don't get merged
                        delete scaleTypeWithExplicitIndex[channel];
                    }
                }
                else {
                    scaleTypeWithExplicitIndex[channel] = childScaleType;
                }
            }
        }
    }
    // Merge each channel listed in the index
    for (const channel of extension_util_keys(scaleTypeWithExplicitIndex)) {
        // Create new merged scale component
        const name = model.scaleName(channel, true);
        const typeWithExplicit = scaleTypeWithExplicitIndex[channel];
        scaleComponents[channel] = new extension_ScaleComponent(name, typeWithExplicit);
        // rename each child and mark them as merged
        for (const child of model.children) {
            const childScale = child.component.scales[channel];
            if (childScale) {
                child.renameScale(childScale.get('name'), name);
                childScale.merged = true;
            }
        }
    }
    return scaleComponents;
}
//# sourceMappingURL=parse.js.map
;// ../../node_modules/vega-lite/build/src/compile/model.js



























class extension_NameMap {
    constructor() {
        this.nameMap = {};
    }
    rename(oldName, newName) {
        this.nameMap[oldName] = newName;
    }
    has(name) {
        return this.nameMap[name] !== undefined;
    }
    get(name) {
        // If the name appears in the _nameMap, we need to read its new name.
        // We have to loop over the dict just in case the new name also gets renamed.
        while (this.nameMap[name] && name !== this.nameMap[name]) {
            name = this.nameMap[name];
        }
        return name;
    }
}
/*
  We use type guards instead of `instanceof` as `instanceof` makes
  different parts of the compiler depend on the actual implementation of
  the model classes, which in turn depend on different parts of the compiler.
  Thus, `instanceof` leads to circular dependency problems.

  On the other hand, type guards only make different parts of the compiler
  depend on the type of the model classes, but not the actual implementation.
*/
function extension_isUnitModel(model) {
    return model?.type === 'unit';
}
function extension_isFacetModel(model) {
    return model?.type === 'facet';
}
function extension_isConcatModel(model) {
    return model?.type === 'concat';
}
function extension_isLayerModel(model) {
    return model?.type === 'layer';
}
class extension_Model {
    constructor(spec, type, parent, parentGivenName, config, resolve, view) {
        this.type = type;
        this.parent = parent;
        this.config = config;
        this.parent = parent;
        this.config = config;
        this.view = extension_replaceExprRef(view);
        // If name is not provided, always use parent's givenName to avoid name conflicts.
        this.name = spec.name ?? parentGivenName;
        this.title = extension_isText(spec.title) ? { text: spec.title } : spec.title ? extension_replaceExprRef(spec.title) : undefined;
        // Shared name maps
        this.scaleNameMap = parent ? parent.scaleNameMap : new extension_NameMap();
        this.projectionNameMap = parent ? parent.projectionNameMap : new extension_NameMap();
        this.signalNameMap = parent ? parent.signalNameMap : new extension_NameMap();
        this.data = spec.data;
        this.description = spec.description;
        this.transforms = extension_normalizeTransform(spec.transform ?? []);
        this.layout = type === 'layer' || type === 'unit' ? {} : extension_extractCompositionLayout(spec, type, config);
        this.component = {
            data: {
                sources: parent ? parent.component.data.sources : [],
                outputNodes: parent ? parent.component.data.outputNodes : {},
                outputNodeRefCounts: parent ? parent.component.data.outputNodeRefCounts : {},
                // data is faceted if the spec is a facet spec or the parent has faceted data and data is undefined
                isFaceted: extension_isFacetSpec(spec) || (parent?.component.data.isFaceted && spec.data === undefined)
            },
            layoutSize: new extension_Split(),
            layoutHeaders: { row: {}, column: {}, facet: {} },
            mark: null,
            resolve: {
                scale: {},
                axis: {},
                legend: {},
                ...(resolve ? extension_duplicate(resolve) : {})
            },
            selection: null,
            scales: null,
            projection: null,
            axes: {},
            legends: {}
        };
    }
    get width() {
        return this.getSizeSignalRef('width');
    }
    get height() {
        return this.getSizeSignalRef('height');
    }
    parse() {
        this.parseScale();
        this.parseLayoutSize(); // depends on scale
        this.renameTopLevelLayoutSizeSignal();
        this.parseSelections();
        this.parseProjection();
        this.parseData(); // (pathorder) depends on markDef; selection filters depend on parsed selections; depends on projection because some transforms require the finalized projection name.
        this.parseAxesAndHeaders(); // depends on scale and layout size
        this.parseLegends(); // depends on scale, markDef
        this.parseMarkGroup(); // depends on data name, scale, layout size, axisGroup, and children's scale, axis, legend and mark.
    }
    parseScale() {
        extension_parseScales(this);
    }
    parseProjection() {
        extension_parse_parseProjection(this);
    }
    /**
     * Rename top-level spec's size to be just width / height, ignoring model name.
     * This essentially merges the top-level spec's width/height signals with the width/height signals
     * to help us reduce redundant signals declaration.
     */
    renameTopLevelLayoutSizeSignal() {
        if (this.getName('width') !== 'width') {
            this.renameSignal(this.getName('width'), 'width');
        }
        if (this.getName('height') !== 'height') {
            this.renameSignal(this.getName('height'), 'height');
        }
    }
    parseLegends() {
        extension_parse_parseLegend(this);
    }
    assembleEncodeFromView(view) {
        // Exclude "style"
        const { style: _, ...baseView } = view;
        const e = {};
        for (const property of extension_util_keys(baseView)) {
            const value = baseView[property];
            if (value !== undefined) {
                e[property] = extension_signalOrValueRef(value);
            }
        }
        return e;
    }
    assembleGroupEncodeEntry(isTopLevel) {
        let encodeEntry = {};
        if (this.view) {
            encodeEntry = this.assembleEncodeFromView(this.view);
        }
        if (!isTopLevel) {
            // Descriptions are already added to the top-level description so we only need to add them to the inner views.
            if (this.description) {
                encodeEntry['description'] = extension_signalOrValueRef(this.description);
            }
            // For top-level spec, we can set the global width and height signal to adjust the group size.
            // For other child specs, we have to manually set width and height in the encode entry.
            if (this.type === 'unit' || this.type === 'layer') {
                return {
                    width: this.getSizeSignalRef('width'),
                    height: this.getSizeSignalRef('height'),
                    ...encodeEntry
                };
            }
        }
        return extension_isEmpty(encodeEntry) ? undefined : encodeEntry;
    }
    assembleLayout() {
        if (!this.layout) {
            return undefined;
        }
        const { spacing, ...layout } = this.layout;
        const { component, config } = this;
        const titleBand = extension_assembleLayoutTitleBand(component.layoutHeaders, config);
        return {
            padding: spacing,
            ...this.assembleDefaultLayout(),
            ...layout,
            ...(titleBand ? { titleBand } : {})
        };
    }
    assembleDefaultLayout() {
        return {};
    }
    assembleHeaderMarks() {
        const { layoutHeaders } = this.component;
        let headerMarks = [];
        for (const channel of extension_FACET_CHANNELS) {
            if (layoutHeaders[channel].title) {
                headerMarks.push(extension_assembleTitleGroup(this, channel));
            }
        }
        for (const channel of extension_HEADER_CHANNELS) {
            headerMarks = headerMarks.concat(extension_assembleHeaderGroups(this, channel));
        }
        return headerMarks;
    }
    assembleAxes() {
        return extension_assembleAxes(this.component.axes, this.config);
    }
    assembleLegends() {
        return extension_assembleLegends(this);
    }
    assembleProjections() {
        return extension_assembleProjections(this);
    }
    assembleTitle() {
        const { encoding, ...titleNoEncoding } = this.title ?? {};
        const title = {
            ...extension_extractTitleConfig(this.config.title).nonMarkTitleProperties,
            ...titleNoEncoding,
            ...(encoding ? { encode: { update: encoding } } : {})
        };
        if (title.text) {
            if (extension_util_contains(['unit', 'layer'], this.type)) {
                // Unit/Layer
                if (extension_util_contains(['middle', undefined], title.anchor)) {
                    title.frame ?? (title.frame = 'group');
                }
            }
            else {
                // composition with Vega layout
                // Set title = "start" by default for composition as "middle" does not look nice
                // https://github.com/vega/vega/issues/960#issuecomment-471360328
                title.anchor ?? (title.anchor = 'start');
            }
            return extension_isEmpty(title) ? undefined : title;
        }
        return undefined;
    }
    /**
     * Assemble the mark group for this model. We accept optional `signals` so that we can include concat top-level signals with the top-level model's local signals.
     */
    assembleGroup(signals = []) {
        const group = {};
        signals = signals.concat(this.assembleSignals());
        if (signals.length > 0) {
            group.signals = signals;
        }
        const layout = this.assembleLayout();
        if (layout) {
            group.layout = layout;
        }
        group.marks = [].concat(this.assembleHeaderMarks(), this.assembleMarks());
        // Only include scales if this spec is top-level or if parent is facet.
        // (Otherwise, it will be merged with upper-level's scope.)
        const scales = !this.parent || extension_isFacetModel(this.parent) ? extension_assembleScales(this) : [];
        if (scales.length > 0) {
            group.scales = scales;
        }
        const axes = this.assembleAxes();
        if (axes.length > 0) {
            group.axes = axes;
        }
        const legends = this.assembleLegends();
        if (legends.length > 0) {
            group.legends = legends;
        }
        return group;
    }
    getName(text) {
        return extension_varName((this.name ? `${this.name}_` : '') + text);
    }
    getDataName(type) {
        return this.getName(extension_DataSourceType[type].toLowerCase());
    }
    /**
     * Request a data source name for the given data source type and mark that data source as required.
     * This method should be called in parse, so that all used data source can be correctly instantiated in assembleData().
     * You can lookup the correct dataset name in assemble with `lookupDataSource`.
     */
    requestDataName(name) {
        const fullName = this.getDataName(name);
        // Increase ref count. This is critical because otherwise we won't create a data source.
        // We also increase the ref counts on OutputNode.getSource() calls.
        const refCounts = this.component.data.outputNodeRefCounts;
        refCounts[fullName] = (refCounts[fullName] || 0) + 1;
        return fullName;
    }
    getSizeSignalRef(layoutSizeType) {
        if (extension_isFacetModel(this.parent)) {
            const sizeType = extension_getSizeTypeFromLayoutSizeType(layoutSizeType);
            const channel = extension_getPositionScaleChannel(sizeType);
            const scaleComponent = this.component.scales[channel];
            if (scaleComponent && !scaleComponent.merged) {
                // independent scale
                const type = scaleComponent.get('type');
                const range = scaleComponent.get('range');
                if (extension_hasDiscreteDomain(type) && extension_isVgRangeStep(range)) {
                    const scaleName = scaleComponent.get('name');
                    const domain = extension_assembleDomain(this, channel);
                    const field = extension_getFieldFromDomain(domain);
                    if (field) {
                        const fieldRef = extension_vgField({ aggregate: 'distinct', field }, { expr: 'datum' });
                        return {
                            signal: extension_sizeExpr(scaleName, scaleComponent, fieldRef)
                        };
                    }
                    else {
                        extension_log_warn(extension_unknownField(channel));
                        return null;
                    }
                }
            }
        }
        return {
            signal: this.signalNameMap.get(this.getName(layoutSizeType))
        };
    }
    /**
     * Lookup the name of the datasource for an output node. You probably want to call this in assemble.
     */
    lookupDataSource(name) {
        const node = this.component.data.outputNodes[name];
        if (!node) {
            // Name not found in map so let's just return what we got.
            // This can happen if we already have the correct name.
            return name;
        }
        return node.getSource();
    }
    getSignalName(oldSignalName) {
        return this.signalNameMap.get(oldSignalName);
    }
    renameSignal(oldName, newName) {
        this.signalNameMap.rename(oldName, newName);
    }
    renameScale(oldName, newName) {
        this.scaleNameMap.rename(oldName, newName);
    }
    renameProjection(oldName, newName) {
        this.projectionNameMap.rename(oldName, newName);
    }
    /**
     * @return scale name for a given channel after the scale has been parsed and named.
     */
    scaleName(originalScaleName, parse) {
        if (parse) {
            // During the parse phase always return a value
            // No need to refer to rename map because a scale can't be renamed
            // before it has the original name.
            return this.getName(originalScaleName);
        }
        // If there is a scale for the channel, it should either
        // be in the scale component or exist in the name map
        if (
        // If there is a scale for the channel, there should be a local scale component for it
        (extension_isChannel(originalScaleName) && extension_isScaleChannel(originalScaleName) && this.component.scales[originalScaleName]) ||
            // in the scale name map (the scale get merged by its parent)
            this.scaleNameMap.has(this.getName(originalScaleName))) {
            return this.scaleNameMap.get(this.getName(originalScaleName));
        }
        return undefined;
    }
    /**
     * @return projection name after the projection has been parsed and named.
     */
    projectionName(parse) {
        if (parse) {
            // During the parse phase always return a value
            // No need to refer to rename map because a projection can't be renamed
            // before it has the original name.
            return this.getName('projection');
        }
        if ((this.component.projection && !this.component.projection.merged) ||
            this.projectionNameMap.has(this.getName('projection'))) {
            return this.projectionNameMap.get(this.getName('projection'));
        }
        return undefined;
    }
    /**
     * Traverse a model's hierarchy to get the scale component for a particular channel.
     */
    getScaleComponent(channel) {
        /* istanbul ignore next: This is warning for debugging test */
        if (!this.component.scales) {
            throw new Error('getScaleComponent cannot be called before parseScale(). Make sure you have called parseScale or use parseUnitModelWithScale().');
        }
        const localScaleComponent = this.component.scales[channel];
        if (localScaleComponent && !localScaleComponent.merged) {
            return localScaleComponent;
        }
        return this.parent ? this.parent.getScaleComponent(channel) : undefined;
    }
    getScaleType(channel) {
        const scaleComponent = this.getScaleComponent(channel);
        return scaleComponent ? scaleComponent.get('type') : undefined;
    }
    /**
     * Traverse a model's hierarchy to get a particular selection component.
     */
    getSelectionComponent(variableName, origName) {
        let sel = this.component.selection[variableName];
        if (!sel && this.parent) {
            sel = this.parent.getSelectionComponent(variableName, origName);
        }
        if (!sel) {
            throw new Error(extension_selectionNotFound(origName));
        }
        return sel;
    }
    /**
     * Returns true if the model has a signalRef for an axis orient.
     */
    hasAxisOrientSignalRef() {
        return (this.component.axes.x?.some(a => a.hasOrientSignalRef()) ||
            this.component.axes.y?.some(a => a.hasOrientSignalRef()));
    }
}
/** Abstract class for UnitModel and FacetModel. Both of which can contain fieldDefs as a part of its own specification. */
class extension_ModelWithField extends extension_Model {
    /** Get "field" reference for Vega */
    vgField(channel, opt = {}) {
        const fieldDef = this.fieldDef(channel);
        if (!fieldDef) {
            return undefined;
        }
        return extension_vgField(fieldDef, opt);
    }
    reduceFieldDef(f, init) {
        return extension_encoding_reduce(this.getMapping(), (acc, cd, c) => {
            const fieldDef = extension_getFieldDef(cd);
            if (fieldDef) {
                return f(acc, fieldDef, c);
            }
            return acc;
        }, init);
    }
    forEachFieldDef(f, t) {
        extension_forEach(this.getMapping(), (cd, c) => {
            const fieldDef = extension_getFieldDef(cd);
            if (fieldDef) {
                f(fieldDef, c);
            }
        }, t);
    }
}
//# sourceMappingURL=model.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/density.js


/**
 * A class for density transform nodes
 */
class extension_DensityTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_DensityTransformNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
        this.transform = extension_duplicate(transform); // duplicate to prevent side effects
        const specifiedAs = this.transform.as ?? [undefined, undefined];
        this.transform.as = [specifiedAs[0] ?? 'value', specifiedAs[1] ?? 'density'];
        const resolve = this.transform.resolve ?? 'shared';
        this.transform.resolve = resolve;
    }
    dependentFields() {
        return new Set([this.transform.density, ...(this.transform.groupby ?? [])]);
    }
    producedFields() {
        return new Set(this.transform.as);
    }
    hash() {
        return `DensityTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const { density, ...rest } = this.transform;
        const result = {
            type: 'kde',
            field: density,
            ...rest
        };
        result.resolve = this.transform.resolve;
        return result;
    }
}
//# sourceMappingURL=density.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/extent.js


/**
 * A class for flatten transform nodes
 */
class extension_ExtentTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_ExtentTransformNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
        this.transform = extension_duplicate(transform);
    }
    dependentFields() {
        return new Set([this.transform.extent]);
    }
    producedFields() {
        return new Set([]);
    }
    hash() {
        return `ExtentTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const { extent, param } = this.transform;
        const result = {
            type: 'extent',
            field: extent,
            signal: param
        };
        return result;
    }
}
//# sourceMappingURL=extent.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/flatten.js


/**
 * A class for flatten transform nodes
 */
class extension_FlattenTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_FlattenTransformNode(this.parent, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
        this.transform = extension_duplicate(transform); // duplicate to prevent side effects
        const { flatten, as = [] } = this.transform;
        this.transform.as = flatten.map((f, i) => as[i] ?? f);
    }
    dependentFields() {
        return new Set(this.transform.flatten);
    }
    producedFields() {
        return new Set(this.transform.as);
    }
    hash() {
        return `FlattenTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const { flatten: fields, as } = this.transform;
        const result = {
            type: 'flatten',
            fields,
            as
        };
        return result;
    }
}
//# sourceMappingURL=flatten.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/fold.js


/**
 * A class for flatten transform nodes
 */
class extension_FoldTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_FoldTransformNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
        this.transform = extension_duplicate(transform); // duplicate to prevent side effects
        const specifiedAs = this.transform.as ?? [undefined, undefined];
        this.transform.as = [specifiedAs[0] ?? 'key', specifiedAs[1] ?? 'value'];
    }
    dependentFields() {
        return new Set(this.transform.fold);
    }
    producedFields() {
        return new Set(this.transform.as);
    }
    hash() {
        return `FoldTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const { fold, as } = this.transform;
        const result = {
            type: 'fold',
            fields: fold,
            as
        };
        return result;
    }
}
//# sourceMappingURL=fold.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/geojson.js






class extension_GeoJSONNode extends extension_DataFlowNode {
    clone() {
        return new extension_GeoJSONNode(null, extension_duplicate(this.fields), this.geojson, this.signal);
    }
    static parseAll(parent, model) {
        if (model.component.projection && !model.component.projection.isFit) {
            return parent;
        }
        let geoJsonCounter = 0;
        for (const coordinates of [
            [extension_LONGITUDE, extension_LATITUDE],
            [extension_LONGITUDE2, extension_LATITUDE2]
        ]) {
            const pair = coordinates.map(channel => {
                const def = extension_getFieldOrDatumDef(model.encoding[channel]);
                return extension_isFieldDef(def)
                    ? def.field
                    : extension_isDatumDef(def)
                        ? { expr: `${def.datum}` }
                        : extension_isValueDef(def)
                            ? { expr: `${def['value']}` }
                            : undefined;
            });
            if (pair[0] || pair[1]) {
                parent = new extension_GeoJSONNode(parent, pair, null, model.getName(`geojson_${geoJsonCounter++}`));
            }
        }
        if (model.channelHasField(extension_SHAPE)) {
            const fieldDef = model.typedFieldDef(extension_SHAPE);
            if (fieldDef.type === extension_GEOJSON) {
                parent = new extension_GeoJSONNode(parent, null, fieldDef.field, model.getName(`geojson_${geoJsonCounter++}`));
            }
        }
        return parent;
    }
    constructor(parent, fields, geojson, signal) {
        super(parent);
        this.fields = fields;
        this.geojson = geojson;
        this.signal = signal;
    }
    dependentFields() {
        const fields = (this.fields ?? []).filter(extension_vega_util_module_isString);
        return new Set([...(this.geojson ? [this.geojson] : []), ...fields]);
    }
    producedFields() {
        return new Set();
    }
    hash() {
        return `GeoJSON ${this.geojson} ${this.signal} ${extension_util_hash(this.fields)}`;
    }
    assemble() {
        return [
            ...(this.geojson
                ? [
                    {
                        type: 'filter',
                        expr: `isValid(datum["${this.geojson}"])`
                    }
                ]
                : []),
            {
                type: 'geojson',
                ...(this.fields ? { fields: this.fields } : {}),
                ...(this.geojson ? { geojson: this.geojson } : {}),
                signal: this.signal
            }
        ];
    }
}
//# sourceMappingURL=geojson.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/geopoint.js





class extension_GeoPointNode extends extension_DataFlowNode {
    clone() {
        return new extension_GeoPointNode(null, this.projection, extension_duplicate(this.fields), extension_duplicate(this.as));
    }
    constructor(parent, projection, fields, as) {
        super(parent);
        this.projection = projection;
        this.fields = fields;
        this.as = as;
    }
    static parseAll(parent, model) {
        if (!model.projectionName()) {
            return parent;
        }
        for (const coordinates of [
            [extension_LONGITUDE, extension_LATITUDE],
            [extension_LONGITUDE2, extension_LATITUDE2]
        ]) {
            const pair = coordinates.map(channel => {
                const def = extension_getFieldOrDatumDef(model.encoding[channel]);
                return extension_isFieldDef(def)
                    ? def.field
                    : extension_isDatumDef(def)
                        ? { expr: `${def.datum}` }
                        : extension_isValueDef(def)
                            ? { expr: `${def['value']}` }
                            : undefined;
            });
            const suffix = coordinates[0] === extension_LONGITUDE2 ? '2' : '';
            if (pair[0] || pair[1]) {
                parent = new extension_GeoPointNode(parent, model.projectionName(), pair, [
                    model.getName(`x${suffix}`),
                    model.getName(`y${suffix}`)
                ]);
            }
        }
        return parent;
    }
    dependentFields() {
        return new Set(this.fields.filter(extension_vega_util_module_isString));
    }
    producedFields() {
        return new Set(this.as);
    }
    hash() {
        return `Geopoint ${this.projection} ${extension_util_hash(this.fields)} ${extension_util_hash(this.as)}`;
    }
    assemble() {
        return {
            type: 'geopoint',
            projection: this.projection,
            fields: this.fields,
            as: this.as
        };
    }
}
//# sourceMappingURL=geopoint.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/impute.js





class extension_ImputeNode extends extension_DataFlowNode {
    clone() {
        return new extension_ImputeNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
    }
    dependentFields() {
        return new Set([this.transform.impute, this.transform.key, ...(this.transform.groupby ?? [])]);
    }
    producedFields() {
        return new Set([this.transform.impute]);
    }
    processSequence(keyvals) {
        const { start = 0, stop, step } = keyvals;
        const result = [start, stop, ...(step ? [step] : [])].join(',');
        return { signal: `sequence(${result})` };
    }
    static makeFromTransform(parent, imputeTransform) {
        return new extension_ImputeNode(parent, imputeTransform);
    }
    static makeFromEncoding(parent, model) {
        const encoding = model.encoding;
        const xDef = encoding.x;
        const yDef = encoding.y;
        if (extension_isFieldDef(xDef) && extension_isFieldDef(yDef)) {
            const imputedChannel = xDef.impute ? xDef : yDef.impute ? yDef : undefined;
            if (imputedChannel === undefined) {
                return undefined;
            }
            const keyChannel = xDef.impute ? yDef : yDef.impute ? xDef : undefined;
            const { method, value, frame, keyvals } = imputedChannel.impute;
            const groupbyFields = extension_pathGroupingFields(model.mark, encoding);
            return new extension_ImputeNode(parent, {
                impute: imputedChannel.field,
                key: keyChannel.field,
                ...(method ? { method } : {}),
                ...(value !== undefined ? { value } : {}),
                ...(frame ? { frame } : {}),
                ...(keyvals !== undefined ? { keyvals } : {}),
                ...(groupbyFields.length ? { groupby: groupbyFields } : {})
            });
        }
        return null;
    }
    hash() {
        return `Impute ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const { impute, key, keyvals, method, groupby, value, frame = [null, null] } = this.transform;
        const imputeTransform = {
            type: 'impute',
            field: impute,
            key,
            ...(keyvals ? { keyvals: extension_isImputeSequence(keyvals) ? this.processSequence(keyvals) : keyvals } : {}),
            method: 'value',
            ...(groupby ? { groupby } : {}),
            value: !method || method === 'value' ? value : null
        };
        if (method && method !== 'value') {
            const deriveNewField = {
                type: 'window',
                as: [`imputed_${impute}_value`],
                ops: [method],
                fields: [impute],
                frame,
                ignorePeers: false,
                ...(groupby ? { groupby } : {})
            };
            const replaceOriginal = {
                type: 'formula',
                expr: `datum.${impute} === null ? datum.imputed_${impute}_value : datum.${impute}`,
                as: impute
            };
            return [imputeTransform, deriveNewField, replaceOriginal];
        }
        else {
            return [imputeTransform];
        }
    }
}
//# sourceMappingURL=impute.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/loess.js


/**
 * A class for loess transform nodes
 */
class extension_LoessTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_LoessTransformNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
        this.transform = extension_duplicate(transform); // duplicate to prevent side effects
        const specifiedAs = this.transform.as ?? [undefined, undefined];
        this.transform.as = [specifiedAs[0] ?? transform.on, specifiedAs[1] ?? transform.loess];
    }
    dependentFields() {
        return new Set([this.transform.loess, this.transform.on, ...(this.transform.groupby ?? [])]);
    }
    producedFields() {
        return new Set(this.transform.as);
    }
    hash() {
        return `LoessTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const { loess, on, ...rest } = this.transform;
        const result = {
            type: 'loess',
            x: on,
            y: loess,
            ...rest
        };
        return result;
    }
}
//# sourceMappingURL=loess.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/lookup.js








class extension_LookupNode extends extension_DataFlowNode {
    clone() {
        return new extension_LookupNode(null, extension_duplicate(this.transform), this.secondary);
    }
    constructor(parent, transform, secondary) {
        super(parent);
        this.transform = transform;
        this.secondary = secondary;
    }
    static make(parent, model, transform, counter) {
        const sources = model.component.data.sources;
        const { from } = transform;
        let fromOutputNode = null;
        if (extension_isLookupData(from)) {
            let fromSource = extension_findSource(from.data, sources);
            if (!fromSource) {
                fromSource = new extension_SourceNode(from.data);
                sources.push(fromSource);
            }
            const fromOutputName = model.getName(`lookup_${counter}`);
            fromOutputNode = new extension_OutputNode(fromSource, fromOutputName, extension_DataSourceType.Lookup, model.component.data.outputNodeRefCounts);
            model.component.data.outputNodes[fromOutputName] = fromOutputNode;
        }
        else if (extension_isLookupSelection(from)) {
            const selName = from.param;
            transform = { as: selName, ...transform };
            let selCmpt;
            try {
                selCmpt = model.getSelectionComponent(extension_varName(selName), selName);
            }
            catch (e) {
                throw new Error(extension_cannotLookupVariableParameter(selName));
            }
            fromOutputNode = selCmpt.materialized;
            if (!fromOutputNode) {
                throw new Error(extension_noSameUnitLookup(selName));
            }
        }
        return new extension_LookupNode(parent, transform, fromOutputNode.getSource());
    }
    dependentFields() {
        return new Set([this.transform.lookup]);
    }
    producedFields() {
        return new Set(this.transform.as ? extension_vega_util_module_array(this.transform.as) : this.transform.from.fields);
    }
    hash() {
        return `Lookup ${extension_util_hash({ transform: this.transform, secondary: this.secondary })}`;
    }
    assemble() {
        let foreign;
        if (this.transform.from.fields) {
            // lookup a few fields and add create a flat output
            foreign = {
                values: this.transform.from.fields,
                ...(this.transform.as ? { as: extension_vega_util_module_array(this.transform.as) } : {})
            };
        }
        else {
            // lookup full record and nest it
            let asName = this.transform.as;
            if (!extension_vega_util_module_isString(asName)) {
                extension_log_warn(extension_NO_FIELDS_NEEDS_AS);
                asName = '_lookup';
            }
            foreign = {
                as: [asName]
            };
        }
        return {
            type: 'lookup',
            from: this.secondary,
            key: this.transform.from.key,
            fields: [this.transform.lookup],
            ...foreign,
            ...(this.transform.default ? { default: this.transform.default } : {})
        };
    }
}
//# sourceMappingURL=lookup.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/quantile.js


/**
 * A class for quantile transform nodes
 */
class extension_QuantileTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_QuantileTransformNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
        this.transform = extension_duplicate(transform); // duplicate to prevent side effects
        const specifiedAs = this.transform.as ?? [undefined, undefined];
        this.transform.as = [specifiedAs[0] ?? 'prob', specifiedAs[1] ?? 'value'];
    }
    dependentFields() {
        return new Set([this.transform.quantile, ...(this.transform.groupby ?? [])]);
    }
    producedFields() {
        return new Set(this.transform.as);
    }
    hash() {
        return `QuantileTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const { quantile, ...rest } = this.transform;
        const result = {
            type: 'quantile',
            field: quantile,
            ...rest
        };
        return result;
    }
}
//# sourceMappingURL=quantile.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/regression.js


/**
 * A class for regression transform nodes
 */
class extension_RegressionTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_RegressionTransformNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
        this.transform = extension_duplicate(transform); // duplicate to prevent side effects
        const specifiedAs = this.transform.as ?? [undefined, undefined];
        this.transform.as = [specifiedAs[0] ?? transform.on, specifiedAs[1] ?? transform.regression];
    }
    dependentFields() {
        return new Set([this.transform.regression, this.transform.on, ...(this.transform.groupby ?? [])]);
    }
    producedFields() {
        return new Set(this.transform.as);
    }
    hash() {
        return `RegressionTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const { regression, on, ...rest } = this.transform;
        const result = {
            type: 'regression',
            x: on,
            y: regression,
            ...rest
        };
        return result;
    }
}
//# sourceMappingURL=regression.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/pivot.js


/**
 * A class for pivot transform nodes.
 */
class extension_PivotTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_PivotTransformNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
    }
    addDimensions(fields) {
        this.transform.groupby = extension_unique((this.transform.groupby ?? []).concat(fields), d => d);
    }
    producedFields() {
        return undefined; // return undefined so that potentially everything can depend on the pivot
    }
    dependentFields() {
        return new Set([this.transform.pivot, this.transform.value, ...(this.transform.groupby ?? [])]);
    }
    hash() {
        return `PivotTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        const { pivot, value, groupby, limit, op } = this.transform;
        return {
            type: 'pivot',
            field: pivot,
            value,
            ...(limit !== undefined ? { limit } : {}),
            ...(op !== undefined ? { op } : {}),
            ...(groupby !== undefined ? { groupby } : {})
        };
    }
}
//# sourceMappingURL=pivot.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/sample.js


/**
 * A class for the sample transform nodes
 */
class extension_SampleTransformNode extends extension_DataFlowNode {
    clone() {
        return new extension_SampleTransformNode(null, extension_duplicate(this.transform));
    }
    constructor(parent, transform) {
        super(parent);
        this.transform = transform;
    }
    dependentFields() {
        return new Set();
    }
    producedFields() {
        return new Set();
    }
    hash() {
        return `SampleTransform ${extension_util_hash(this.transform)}`;
    }
    assemble() {
        return {
            type: 'sample',
            size: this.transform.sample
        };
    }
}
//# sourceMappingURL=sample.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/assemble.js






























function extension_makeWalkTree(data) {
    // to name datasources
    let datasetIndex = 0;
    /**
     * Recursively walk down the tree.
     */
    function walkTree(node, dataSource) {
        if (node instanceof extension_SourceNode) {
            // If the source is a named data source or a data source with values, we need
            // to put it in a different data source. Otherwise, Vega may override the data.
            if (!node.isGenerator && !extension_isUrlData(node.data)) {
                data.push(dataSource);
                const newData = {
                    name: null,
                    source: dataSource.name,
                    transform: []
                };
                dataSource = newData;
            }
        }
        if (node instanceof extension_ParseNode) {
            if (node.parent instanceof extension_SourceNode && !dataSource.source) {
                // If node's parent is a root source and the data source does not refer to another data source, use normal format parse
                dataSource.format = {
                    ...dataSource.format,
                    parse: node.assembleFormatParse()
                };
                // add calculates for all nested fields
                dataSource.transform.push(...node.assembleTransforms(true));
            }
            else {
                // Otherwise use Vega expression to parse
                dataSource.transform.push(...node.assembleTransforms());
            }
        }
        if (node instanceof extension_FacetNode) {
            if (!dataSource.name) {
                dataSource.name = `data_${datasetIndex++}`;
            }
            if (!dataSource.source || dataSource.transform.length > 0) {
                data.push(dataSource);
                node.data = dataSource.name;
            }
            else {
                node.data = dataSource.source;
            }
            data.push(...node.assemble());
            // break here because the rest of the tree has to be taken care of by the facet.
            return;
        }
        if (node instanceof extension_GraticuleNode ||
            node instanceof extension_SequenceNode ||
            node instanceof extension_FilterInvalidNode ||
            node instanceof extension_FilterNode ||
            node instanceof extension_CalculateNode ||
            node instanceof extension_GeoPointNode ||
            node instanceof extension_AggregateNode ||
            node instanceof extension_LookupNode ||
            node instanceof extension_WindowTransformNode ||
            node instanceof extension_JoinAggregateTransformNode ||
            node instanceof extension_FoldTransformNode ||
            node instanceof extension_FlattenTransformNode ||
            node instanceof extension_DensityTransformNode ||
            node instanceof extension_LoessTransformNode ||
            node instanceof extension_QuantileTransformNode ||
            node instanceof extension_RegressionTransformNode ||
            node instanceof extension_IdentifierNode ||
            node instanceof extension_SampleTransformNode ||
            node instanceof extension_PivotTransformNode ||
            node instanceof extension_ExtentTransformNode) {
            dataSource.transform.push(node.assemble());
        }
        if (node instanceof extension_BinNode ||
            node instanceof extension_TimeUnitNode ||
            node instanceof extension_ImputeNode ||
            node instanceof extension_StackNode ||
            node instanceof extension_GeoJSONNode) {
            dataSource.transform.push(...node.assemble());
        }
        if (node instanceof extension_OutputNode) {
            if (dataSource.source && dataSource.transform.length === 0) {
                node.setSource(dataSource.source);
            }
            else if (node.parent instanceof extension_OutputNode) {
                // Note that an output node may be required but we still do not assemble a
                // separate data source for it.
                node.setSource(dataSource.name);
            }
            else {
                if (!dataSource.name) {
                    dataSource.name = `data_${datasetIndex++}`;
                }
                // Here we set the name of the datasource we generated. From now on
                // other assemblers can use it.
                node.setSource(dataSource.name);
                // if this node has more than one child, we will add a datasource automatically
                if (node.numChildren() === 1) {
                    data.push(dataSource);
                    const newData = {
                        name: null,
                        source: dataSource.name,
                        transform: []
                    };
                    dataSource = newData;
                }
            }
        }
        switch (node.numChildren()) {
            case 0:
                // done
                if (node instanceof extension_OutputNode && (!dataSource.source || dataSource.transform.length > 0)) {
                    // do not push empty datasources that are simply references
                    data.push(dataSource);
                }
                break;
            case 1:
                walkTree(node.children[0], dataSource);
                break;
            default: {
                if (!dataSource.name) {
                    dataSource.name = `data_${datasetIndex++}`;
                }
                let source = dataSource.name;
                if (!dataSource.source || dataSource.transform.length > 0) {
                    data.push(dataSource);
                }
                else {
                    source = dataSource.source;
                }
                for (const child of node.children) {
                    const newData = {
                        name: null,
                        source,
                        transform: []
                    };
                    walkTree(child, newData);
                }
                break;
            }
        }
    }
    return walkTree;
}
/**
 * Assemble data sources that are derived from faceted data.
 */
function extension_assembleFacetData(root) {
    const data = [];
    const walkTree = extension_makeWalkTree(data);
    for (const child of root.children) {
        walkTree(child, {
            source: root.name,
            name: null,
            transform: []
        });
    }
    return data;
}
/**
 * Create Vega data array from a given compiled model and append all of them to the given array
 *
 * @param  model
 * @param  data array
 * @return modified data array
 */
function extension_assembleRootData(dataComponent, datasets) {
    const data = [];
    // dataComponent.sources.forEach(debug);
    // draw(dataComponent.sources);
    const walkTree = extension_makeWalkTree(data);
    let sourceIndex = 0;
    for (const root of dataComponent.sources) {
        // assign a name if the source does not have a name yet
        if (!root.hasName()) {
            root.dataName = `source_${sourceIndex++}`;
        }
        const newData = root.assemble();
        walkTree(root, newData);
    }
    // remove empty transform arrays for cleaner output
    for (const d of data) {
        if (d.transform.length === 0) {
            delete d.transform;
        }
    }
    // move sources without transforms (the ones that are potentially used in lookups) to the beginning
    let whereTo = 0;
    for (const [i, d] of data.entries()) {
        if ((d.transform ?? []).length === 0 && !d.source) {
            data.splice(whereTo++, 0, data.splice(i, 1)[0]);
        }
    }
    // now fix the from references in lookup transforms
    for (const d of data) {
        for (const t of d.transform ?? []) {
            if (t.type === 'lookup') {
                t.from = dataComponent.outputNodes[t.from].getSource();
            }
        }
    }
    // inline values for datasets that are in the datastore
    for (const d of data) {
        if (d.name in datasets) {
            d.values = datasets[d.name];
        }
    }
    return data;
}
//# sourceMappingURL=assemble.js.map
;// ../../node_modules/vega-lite/build/src/compile/header/parse.js








function extension_getHeaderType(orient) {
    if (orient === 'top' || orient === 'left' || extension_isSignalRef(orient)) {
        // we always use header for orient signal since we can't dynamically make header becomes footer
        return 'header';
    }
    return 'footer';
}
function extension_parseFacetHeaders(model) {
    for (const channel of extension_FACET_CHANNELS) {
        extension_parseFacetHeader(model, channel);
    }
    extension_mergeChildAxis(model, 'x');
    extension_mergeChildAxis(model, 'y');
}
function extension_parseFacetHeader(model, channel) {
    const { facet, config, child, component } = model;
    if (model.channelHasField(channel)) {
        const fieldDef = facet[channel];
        const titleConfig = extension_getHeaderProperty('title', null, config, channel);
        let title = extension_channeldef_title(fieldDef, config, {
            allowDisabling: true,
            includeDefault: titleConfig === undefined || !!titleConfig
        });
        if (child.component.layoutHeaders[channel].title) {
            // TODO: better handle multiline titles
            title = extension_vega_util_module_isArray(title) ? title.join(', ') : title;
            // merge title with child to produce "Title / Subtitle / Sub-subtitle"
            title += ` / ${child.component.layoutHeaders[channel].title}`;
            child.component.layoutHeaders[channel].title = null;
        }
        const labelOrient = extension_getHeaderProperty('labelOrient', fieldDef.header, config, channel);
        const labels = fieldDef.header !== null ? extension_getFirstDefined(fieldDef.header?.labels, config.header.labels, true) : false;
        const headerType = extension_util_contains(['bottom', 'right'], labelOrient) ? 'footer' : 'header';
        component.layoutHeaders[channel] = {
            title: fieldDef.header !== null ? title : null,
            facetFieldDef: fieldDef,
            [headerType]: channel === 'facet' ? [] : [extension_makeHeaderComponent(model, channel, labels)]
        };
    }
}
function extension_makeHeaderComponent(model, channel, labels) {
    const sizeType = channel === 'row' ? 'height' : 'width';
    return {
        labels,
        sizeSignal: model.child.component.layoutSize.get(sizeType) ? model.child.getSizeSignalRef(sizeType) : undefined,
        axes: []
    };
}
function extension_mergeChildAxis(model, channel) {
    const { child } = model;
    if (child.component.axes[channel]) {
        const { layoutHeaders, resolve } = model.component;
        resolve.axis[channel] = extension_parseGuideResolve(resolve, channel);
        if (resolve.axis[channel] === 'shared') {
            // For shared axis, move the axes to facet's header or footer
            const headerChannel = channel === 'x' ? 'column' : 'row';
            const layoutHeader = layoutHeaders[headerChannel];
            for (const axisComponent of child.component.axes[channel]) {
                const headerType = extension_getHeaderType(axisComponent.get('orient'));
                layoutHeader[headerType] ?? (layoutHeader[headerType] = [extension_makeHeaderComponent(model, headerChannel, false)]);
                // FIXME: assemble shouldn't be called here, but we do it this way so we only extract the main part of the axes
                const mainAxis = extension_assembleAxis(axisComponent, 'main', model.config, { header: true });
                if (mainAxis) {
                    // LayoutHeader no longer keep track of property precedence, thus let's combine.
                    layoutHeader[headerType][0].axes.push(mainAxis);
                }
                axisComponent.mainExtracted = true;
            }
        }
        else {
            // Otherwise do nothing for independent axes
        }
    }
}
//# sourceMappingURL=parse.js.map
;// ../../node_modules/vega-lite/build/src/compile/layoutsize/parse.js








function extension_parseLayerLayoutSize(model) {
    extension_parseChildrenLayoutSize(model);
    extension_parseNonUnitLayoutSizeForChannel(model, 'width');
    extension_parseNonUnitLayoutSizeForChannel(model, 'height');
}
function extension_parseConcatLayoutSize(model) {
    extension_parseChildrenLayoutSize(model);
    // for columns === 1 (vconcat), we can completely merge width. Otherwise, we can treat merged width as childWidth.
    const widthType = model.layout.columns === 1 ? 'width' : 'childWidth';
    // for columns === undefined (hconcat), we can completely merge height. Otherwise, we can treat merged height as childHeight.
    const heightType = model.layout.columns === undefined ? 'height' : 'childHeight';
    extension_parseNonUnitLayoutSizeForChannel(model, widthType);
    extension_parseNonUnitLayoutSizeForChannel(model, heightType);
}
function extension_parseChildrenLayoutSize(model) {
    for (const child of model.children) {
        child.parseLayoutSize();
    }
}
/**
 * Merge child layout size (width or height).
 */
function extension_parseNonUnitLayoutSizeForChannel(model, layoutSizeType) {
    /*
     * For concat, the parent width or height might not be the same as the children's shared height.
     * For example, hconcat's subviews may share width, but the shared width is not the hconcat view's width.
     *
     * layoutSizeType represents the output of the view (could be childWidth/childHeight/width/height)
     * while the sizeType represents the properties of the child.
     */
    const sizeType = extension_getSizeTypeFromLayoutSizeType(layoutSizeType);
    const channel = extension_getPositionScaleChannel(sizeType);
    const resolve = model.component.resolve;
    const layoutSizeCmpt = model.component.layoutSize;
    let mergedSize;
    // Try to merge layout size
    for (const child of model.children) {
        const childSize = child.component.layoutSize.getWithExplicit(sizeType);
        const scaleResolve = resolve.scale[channel] ?? extension_defaultScaleResolve(channel, model);
        if (scaleResolve === 'independent' && childSize.value === 'step') {
            // Do not merge independent scales with range-step as their size depends
            // on the scale domains, which can be different between scales.
            mergedSize = undefined;
            break;
        }
        if (mergedSize) {
            if (scaleResolve === 'independent' && mergedSize.value !== childSize.value) {
                // For independent scale, only merge if all the sizes are the same.
                // If the values are different, abandon the merge!
                mergedSize = undefined;
                break;
            }
            mergedSize = extension_mergeValuesWithExplicit(mergedSize, childSize, sizeType, '');
        }
        else {
            mergedSize = childSize;
        }
    }
    if (mergedSize) {
        // If merged, rename size and set size of all children.
        for (const child of model.children) {
            model.renameSignal(child.getName(sizeType), model.getName(layoutSizeType));
            child.component.layoutSize.set(sizeType, 'merged', false);
        }
        layoutSizeCmpt.setWithExplicit(layoutSizeType, mergedSize);
    }
    else {
        layoutSizeCmpt.setWithExplicit(layoutSizeType, {
            explicit: false,
            value: undefined
        });
    }
}
function extension_parseUnitLayoutSize(model) {
    const { size, component } = model;
    for (const channel of extension_POSITION_SCALE_CHANNELS) {
        const sizeType = extension_getSizeChannel(channel);
        if (size[sizeType]) {
            const specifiedSize = size[sizeType];
            component.layoutSize.set(sizeType, extension_isStep(specifiedSize) ? 'step' : specifiedSize, true);
        }
        else {
            const defaultSize = extension_defaultUnitSize(model, sizeType);
            component.layoutSize.set(sizeType, defaultSize, false);
        }
    }
}
function extension_defaultUnitSize(model, sizeType) {
    const channel = sizeType === 'width' ? 'x' : 'y';
    const config = model.config;
    const scaleComponent = model.getScaleComponent(channel);
    if (scaleComponent) {
        const scaleType = scaleComponent.get('type');
        const range = scaleComponent.get('range');
        if (extension_hasDiscreteDomain(scaleType)) {
            const size = extension_getViewConfigDiscreteSize(config.view, sizeType);
            if (extension_isVgRangeStep(range) || extension_isStep(size)) {
                // For discrete domain with range.step, use dynamic width/height
                return 'step';
            }
            else {
                return size;
            }
        }
        else {
            return extension_getViewConfigContinuousSize(config.view, sizeType);
        }
    }
    else if (model.hasProjection || model.mark === 'arc') {
        // arc should use continuous size by default otherwise the pie is extremely small
        return extension_getViewConfigContinuousSize(config.view, sizeType);
    }
    else {
        const size = extension_getViewConfigDiscreteSize(config.view, sizeType);
        return extension_isStep(size) ? size.step : size;
    }
}
//# sourceMappingURL=parse.js.map
;// ../../node_modules/vega-lite/build/src/compile/facet.js

























function extension_facetSortFieldName(fieldDef, sort, opt) {
    return extension_vgField(sort, { suffix: `by_${extension_vgField(fieldDef)}`, ...opt });
}
class extension_FacetModel extends extension_ModelWithField {
    constructor(spec, parent, parentGivenName, config) {
        super(spec, 'facet', parent, parentGivenName, config, spec.resolve);
        this.child = extension_buildModel(spec.spec, this, this.getName('child'), undefined, config);
        this.children = [this.child];
        this.facet = this.initFacet(spec.facet);
    }
    initFacet(facet) {
        // clone to prevent side effect to the original spec
        if (!extension_isFacetMapping(facet)) {
            return { facet: this.initFacetFieldDef(facet, 'facet') };
        }
        const channels = extension_util_keys(facet);
        const normalizedFacet = {};
        for (const channel of channels) {
            if (![extension_ROW, extension_COLUMN].includes(channel)) {
                // Drop unsupported channel
                extension_log_warn(extension_incompatibleChannel(channel, 'facet'));
                break;
            }
            const fieldDef = facet[channel];
            if (fieldDef.field === undefined) {
                extension_log_warn(extension_emptyFieldDef(fieldDef, channel));
                break;
            }
            normalizedFacet[channel] = this.initFacetFieldDef(fieldDef, channel);
        }
        return normalizedFacet;
    }
    initFacetFieldDef(fieldDef, channel) {
        // Cast because we call initFieldDef, which assumes general FieldDef.
        // However, FacetFieldDef is a bit more constrained than the general FieldDef
        const facetFieldDef = extension_initFieldDef(fieldDef, channel);
        if (facetFieldDef.header) {
            facetFieldDef.header = extension_replaceExprRef(facetFieldDef.header);
        }
        else if (facetFieldDef.header === null) {
            facetFieldDef.header = null;
        }
        return facetFieldDef;
    }
    channelHasField(channel) {
        return extension_util_hasProperty(this.facet, channel);
    }
    fieldDef(channel) {
        return this.facet[channel];
    }
    parseData() {
        this.component.data = extension_parse_parseData(this);
        this.child.parseData();
    }
    parseLayoutSize() {
        extension_parseChildrenLayoutSize(this);
    }
    parseSelections() {
        // As a facet has a single child, the selection components are the same.
        // The child maintains its selections to assemble signals, which remain
        // within its unit.
        this.child.parseSelections();
        this.component.selection = this.child.component.selection;
        if (Object.values(this.component.selection).some(selCmpt => extension_isTimerSelection(selCmpt))) {
            extension_log_error(extension_MULTI_VIEW_ANIMATION_UNSUPPORTED);
        }
    }
    parseMarkGroup() {
        this.child.parseMarkGroup();
    }
    parseAxesAndHeaders() {
        this.child.parseAxesAndHeaders();
        extension_parseFacetHeaders(this);
    }
    assembleSelectionTopLevelSignals(signals) {
        return this.child.assembleSelectionTopLevelSignals(signals);
    }
    assembleSignals() {
        this.child.assembleSignals();
        return [];
    }
    assembleSelectionData(data) {
        return this.child.assembleSelectionData(data);
    }
    getHeaderLayoutMixins() {
        const layoutMixins = {};
        for (const channel of extension_FACET_CHANNELS) {
            for (const headerType of extension_HEADER_TYPES) {
                const layoutHeaderComponent = this.component.layoutHeaders[channel];
                const headerComponent = layoutHeaderComponent[headerType];
                const { facetFieldDef } = layoutHeaderComponent;
                if (facetFieldDef) {
                    const titleOrient = extension_getHeaderProperty('titleOrient', facetFieldDef.header, this.config, channel);
                    if (['right', 'bottom'].includes(titleOrient)) {
                        const headerChannel = extension_getHeaderChannel(channel, titleOrient);
                        layoutMixins.titleAnchor ?? (layoutMixins.titleAnchor = {});
                        layoutMixins.titleAnchor[headerChannel] = 'end';
                    }
                }
                if (headerComponent?.[0]) {
                    // set header/footerBand
                    const sizeType = channel === 'row' ? 'height' : 'width';
                    const bandType = headerType === 'header' ? 'headerBand' : 'footerBand';
                    if (channel !== 'facet' && !this.child.component.layoutSize.get(sizeType)) {
                        // If facet child does not have size signal, then apply headerBand
                        layoutMixins[bandType] ?? (layoutMixins[bandType] = {});
                        layoutMixins[bandType][channel] = 0.5;
                    }
                    if (layoutHeaderComponent.title) {
                        layoutMixins.offset ?? (layoutMixins.offset = {});
                        layoutMixins.offset[channel === 'row' ? 'rowTitle' : 'columnTitle'] = 10;
                    }
                }
            }
        }
        return layoutMixins;
    }
    assembleDefaultLayout() {
        const { column, row } = this.facet;
        const columns = column ? this.columnDistinctSignal() : row ? 1 : undefined;
        let align = 'all';
        // Do not align the cells if the scale corresponding to the direction is indepent.
        // We always align when we facet into both row and column.
        if (!row && this.component.resolve.scale.x === 'independent') {
            align = 'none';
        }
        else if (!column && this.component.resolve.scale.y === 'independent') {
            align = 'none';
        }
        return {
            ...this.getHeaderLayoutMixins(),
            ...(columns ? { columns } : {}),
            bounds: 'full',
            align
        };
    }
    assembleLayoutSignals() {
        // FIXME(https://github.com/vega/vega-lite/issues/1193): this can be incorrect if we have independent scales.
        return this.child.assembleLayoutSignals();
    }
    columnDistinctSignal() {
        if (this.parent && this.parent instanceof extension_FacetModel) {
            // For nested facet, we will add columns to group mark instead
            // See discussion in https://github.com/vega/vega/issues/952
            // and https://github.com/vega/vega-view/releases/tag/v1.2.6
            return undefined;
        }
        else {
            // In facetNode.assemble(), the name is always this.getName('column') + '_layout'.
            const facetLayoutDataName = this.getName('column_domain');
            return { signal: `length(data('${facetLayoutDataName}'))` };
        }
    }
    assembleGroupStyle() {
        return undefined;
    }
    assembleGroup(signals) {
        if (this.parent && this.parent instanceof extension_FacetModel) {
            // Provide number of columns for layout.
            // See discussion in https://github.com/vega/vega/issues/952
            // and https://github.com/vega/vega-view/releases/tag/v1.2.6
            return {
                ...(this.channelHasField('column')
                    ? {
                        encode: {
                            update: {
                                // TODO(https://github.com/vega/vega-lite/issues/2759):
                                // Correct the signal for facet of concat of facet_column
                                columns: { field: extension_vgField(this.facet.column, { prefix: 'distinct' }) }
                            }
                        }
                    }
                    : {}),
                ...super.assembleGroup(signals)
            };
        }
        return super.assembleGroup(signals);
    }
    /**
     * Aggregate cardinality for calculating size
     */
    getCardinalityAggregateForChild() {
        const fields = [];
        const ops = [];
        const as = [];
        if (this.child instanceof extension_FacetModel) {
            if (this.child.channelHasField('column')) {
                const field = extension_vgField(this.child.facet.column);
                fields.push(field);
                ops.push('distinct');
                as.push(`distinct_${field}`);
            }
        }
        else {
            for (const channel of extension_POSITION_SCALE_CHANNELS) {
                const childScaleComponent = this.child.component.scales[channel];
                if (childScaleComponent && !childScaleComponent.merged) {
                    const type = childScaleComponent.get('type');
                    const range = childScaleComponent.get('range');
                    if (extension_hasDiscreteDomain(type) && extension_isVgRangeStep(range)) {
                        const domain = extension_assembleDomain(this.child, channel);
                        const field = extension_getFieldFromDomain(domain);
                        if (field) {
                            fields.push(field);
                            ops.push('distinct');
                            as.push(`distinct_${field}`);
                        }
                        else {
                            extension_log_warn(extension_unknownField(channel));
                        }
                    }
                }
            }
        }
        return { fields, ops, as };
    }
    assembleFacet() {
        const { name, data } = this.component.data.facetRoot;
        const { row, column } = this.facet;
        const { fields, ops, as } = this.getCardinalityAggregateForChild();
        const groupby = [];
        for (const channel of extension_FACET_CHANNELS) {
            const fieldDef = this.facet[channel];
            if (fieldDef) {
                groupby.push(extension_vgField(fieldDef));
                const { bin, sort } = fieldDef;
                if (extension_isBinning(bin)) {
                    groupby.push(extension_vgField(fieldDef, { binSuffix: 'end' }));
                }
                if (extension_isSortField(sort)) {
                    const { field, op = extension_DEFAULT_SORT_OP } = sort;
                    const outputName = extension_facetSortFieldName(fieldDef, sort);
                    if (row && column) {
                        // For crossed facet, use pre-calculate field as it requires a different groupby
                        // For each calculated field, apply max and assign them to the same name as
                        // all values of the same group should be the same anyway.
                        fields.push(outputName);
                        ops.push('max');
                        as.push(outputName);
                    }
                    else {
                        fields.push(field);
                        ops.push(op);
                        as.push(outputName);
                    }
                }
                else if (extension_vega_util_module_isArray(sort)) {
                    const outputName = extension_sortArrayIndexField(fieldDef, channel);
                    fields.push(outputName);
                    ops.push('max');
                    as.push(outputName);
                }
            }
        }
        const cross = !!row && !!column;
        return {
            name,
            data,
            groupby,
            ...(cross || fields.length > 0
                ? {
                    aggregate: {
                        ...(cross ? { cross } : {}),
                        ...(fields.length ? { fields, ops, as } : {})
                    }
                }
                : {})
        };
    }
    facetSortFields(channel) {
        const { facet } = this;
        const fieldDef = facet[channel];
        if (fieldDef) {
            if (extension_isSortField(fieldDef.sort)) {
                return [extension_facetSortFieldName(fieldDef, fieldDef.sort, { expr: 'datum' })];
            }
            else if (extension_vega_util_module_isArray(fieldDef.sort)) {
                return [extension_sortArrayIndexField(fieldDef, channel, { expr: 'datum' })];
            }
            return [extension_vgField(fieldDef, { expr: 'datum' })];
        }
        return [];
    }
    facetSortOrder(channel) {
        const { facet } = this;
        const fieldDef = facet[channel];
        if (fieldDef) {
            const { sort } = fieldDef;
            const order = (extension_isSortField(sort) ? sort.order : !extension_vega_util_module_isArray(sort) && sort) || 'ascending';
            return [order];
        }
        return [];
    }
    assembleLabelTitle() {
        const { facet, config } = this;
        if (facet.facet) {
            // Facet always uses title to display labels
            return extension_assembleLabelTitle(facet.facet, 'facet', config);
        }
        const ORTHOGONAL_ORIENT = {
            row: ['top', 'bottom'],
            column: ['left', 'right']
        };
        for (const channel of extension_HEADER_CHANNELS) {
            if (facet[channel]) {
                const labelOrient = extension_getHeaderProperty('labelOrient', facet[channel]?.header, config, channel);
                if (ORTHOGONAL_ORIENT[channel].includes(labelOrient)) {
                    // Row/Column with orthogonal labelOrient must use title to display labels
                    return extension_assembleLabelTitle(facet[channel], channel, config);
                }
            }
        }
        return undefined;
    }
    assembleMarks() {
        const { child } = this;
        // If we facet by two dimensions, we need to add a cross operator to the aggregation
        // so that we create all groups
        const facetRoot = this.component.data.facetRoot;
        const data = extension_assembleFacetData(facetRoot);
        const encodeEntry = child.assembleGroupEncodeEntry(false);
        const title = this.assembleLabelTitle() || child.assembleTitle();
        const style = child.assembleGroupStyle();
        const markGroup = {
            name: this.getName('cell'),
            type: 'group',
            ...(title ? { title } : {}),
            ...(style ? { style } : {}),
            from: {
                facet: this.assembleFacet()
            },
            // TODO: move this to after data
            sort: {
                field: extension_FACET_CHANNELS.map(c => this.facetSortFields(c)).flat(),
                order: extension_FACET_CHANNELS.map(c => this.facetSortOrder(c)).flat()
            },
            ...(data.length > 0 ? { data } : {}),
            ...(encodeEntry ? { encode: { update: encodeEntry } } : {}),
            ...child.assembleGroup(extension_assembleFacetSignals(this, []))
        };
        return [markGroup];
    }
    getMapping() {
        return this.facet;
    }
}
//# sourceMappingURL=facet.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/joinaggregatefacet.js




function extension_makeJoinAggregateFromFacet(parent, facet) {
    const { row, column } = facet;
    if (row && column) {
        let newParent = null;
        // only need to make one for crossed facet
        for (const fieldDef of [row, column]) {
            if (extension_isSortField(fieldDef.sort)) {
                const { field, op = extension_DEFAULT_SORT_OP } = fieldDef.sort;
                parent = newParent = new extension_JoinAggregateTransformNode(parent, {
                    joinaggregate: [
                        {
                            op,
                            field,
                            as: extension_facetSortFieldName(fieldDef, fieldDef.sort, { forAs: true })
                        }
                    ],
                    groupby: [extension_vgField(fieldDef)]
                });
            }
        }
        return newParent;
    }
    return null;
}
//# sourceMappingURL=joinaggregatefacet.js.map
;// ../../node_modules/vega-lite/build/src/compile/data/parse.js









































function extension_findSource(data, sources) {
    for (const other of sources) {
        const otherData = other.data;
        // if both datasets have a name defined, we cannot merge
        if (data.name && other.hasName() && data.name !== other.dataName) {
            continue;
        }
        const formatMesh = data.format?.mesh;
        const otherFeature = otherData.format?.feature;
        // feature and mesh are mutually exclusive
        if (formatMesh && otherFeature) {
            continue;
        }
        // we have to extract the same feature or mesh
        const formatFeature = data.format?.feature;
        if ((formatFeature || otherFeature) && formatFeature !== otherFeature) {
            continue;
        }
        const otherMesh = otherData.format?.mesh;
        if ((formatMesh || otherMesh) && formatMesh !== otherMesh) {
            continue;
        }
        if (extension_isInlineData(data) && extension_isInlineData(otherData)) {
            if (extension_util_deepEqual(data.values, otherData.values)) {
                return other;
            }
        }
        else if (extension_isUrlData(data) && extension_isUrlData(otherData)) {
            if (data.url === otherData.url) {
                return other;
            }
        }
        else if (extension_isNamedData(data)) {
            if (data.name === other.dataName) {
                return other;
            }
        }
    }
    return null;
}
function extension_parseRoot(model, sources) {
    if (model.data || !model.parent) {
        // if the model defines a data source or is the root, create a source node
        if (model.data === null) {
            // data: null means we should ignore the parent's data so we just create a new data source
            const source = new extension_SourceNode({ values: [] });
            sources.push(source);
            return source;
        }
        const existingSource = extension_findSource(model.data, sources);
        if (existingSource) {
            if (!extension_isGenerator(model.data)) {
                existingSource.data.format = extension_mergeDeep({}, model.data.format, existingSource.data.format);
            }
            // if the new source has a name but the existing one does not, we can set it
            if (!existingSource.hasName() && model.data.name) {
                existingSource.dataName = model.data.name;
            }
            return existingSource;
        }
        else {
            const source = new extension_SourceNode(model.data);
            sources.push(source);
            return source;
        }
    }
    else {
        // If we don't have a source defined (overriding parent's data), use the parent's facet root or main.
        return model.parent.component.data.facetRoot
            ? model.parent.component.data.facetRoot
            : model.parent.component.data.main;
    }
}
/**
 * Parses a transform array into a chain of connected dataflow nodes.
 */
function extension_parseTransformArray(head, model, ancestorParse) {
    let lookupCounter = 0;
    for (const t of model.transforms) {
        let derivedType = undefined;
        let transformNode;
        if (extension_isCalculate(t)) {
            transformNode = head = new extension_CalculateNode(head, t);
            derivedType = 'derived';
        }
        else if (extension_isFilter(t)) {
            const implicit = extension_getImplicitFromFilterTransform(t);
            transformNode = head = extension_ParseNode.makeWithAncestors(head, {}, implicit, ancestorParse) ?? head;
            head = new extension_FilterNode(head, model, t.filter);
        }
        else if (extension_isBin(t)) {
            transformNode = head = extension_BinNode.makeFromTransform(head, t, model);
            derivedType = 'number';
        }
        else if (extension_isTimeUnit(t)) {
            derivedType = 'date';
            const parsedAs = ancestorParse.getWithExplicit(t.field);
            // Create parse node because the input to time unit is always date.
            if (parsedAs.value === undefined) {
                head = new extension_ParseNode(head, { [t.field]: derivedType });
                ancestorParse.set(t.field, derivedType, false);
            }
            transformNode = head = extension_TimeUnitNode.makeFromTransform(head, t);
        }
        else if (extension_transform_isAggregate(t)) {
            transformNode = head = extension_AggregateNode.makeFromTransform(head, t);
            derivedType = 'number';
            if (extension_requiresSelectionId(model)) {
                head = new extension_IdentifierNode(head);
            }
        }
        else if (extension_isLookup(t)) {
            transformNode = head = extension_LookupNode.make(head, model, t, lookupCounter++);
            derivedType = 'derived';
        }
        else if (extension_isWindow(t)) {
            transformNode = head = new extension_WindowTransformNode(head, t);
            derivedType = 'number';
        }
        else if (extension_isJoinAggregate(t)) {
            transformNode = head = new extension_JoinAggregateTransformNode(head, t);
            derivedType = 'number';
        }
        else if (extension_isStack(t)) {
            transformNode = head = extension_StackNode.makeFromTransform(head, t);
            derivedType = 'derived';
        }
        else if (extension_isFold(t)) {
            transformNode = head = new extension_FoldTransformNode(head, t);
            derivedType = 'derived';
        }
        else if (extension_isExtent(t)) {
            transformNode = head = new extension_ExtentTransformNode(head, t);
            derivedType = 'derived';
        }
        else if (extension_isFlatten(t)) {
            transformNode = head = new extension_FlattenTransformNode(head, t);
            derivedType = 'derived';
        }
        else if (extension_isPivot(t)) {
            transformNode = head = new extension_PivotTransformNode(head, t);
            derivedType = 'derived';
        }
        else if (extension_isSample(t)) {
            head = new extension_SampleTransformNode(head, t);
        }
        else if (extension_isImpute(t)) {
            transformNode = head = extension_ImputeNode.makeFromTransform(head, t);
            derivedType = 'derived';
        }
        else if (extension_isDensity(t)) {
            transformNode = head = new extension_DensityTransformNode(head, t);
            derivedType = 'derived';
        }
        else if (extension_transform_isQuantile(t)) {
            transformNode = head = new extension_QuantileTransformNode(head, t);
            derivedType = 'derived';
        }
        else if (extension_isRegression(t)) {
            transformNode = head = new extension_RegressionTransformNode(head, t);
            derivedType = 'derived';
        }
        else if (extension_isLoess(t)) {
            transformNode = head = new extension_LoessTransformNode(head, t);
            derivedType = 'derived';
        }
        else {
            extension_log_warn(extension_invalidTransformIgnored(t));
            continue;
        }
        if (transformNode && derivedType !== undefined) {
            for (const field of transformNode.producedFields() ?? []) {
                ancestorParse.set(field, derivedType, false);
            }
        }
    }
    return head;
}
/*
Description of the dataflow (http://asciiflow.com/):
     +--------+
     | Source |
     +---+----+
         |
         v
     FormatParse
     (explicit)
         |
         v
     Transforms
(Filter, Calculate, Binning, TimeUnit, Aggregate, Window, ...)
         |
         v
     FormatParse
     (implicit)
         |
         v
 Binning (in `encoding`)
         |
         v
 Timeunit (in `encoding`)
         |
         v
Formula From Sort Array
         |
         v
      +--+--+
      | Raw |
      +-----+
         |
         v
  Aggregate (in `encoding`)
         |
         v
  Stack (in `encoding`)
         |
         v
+- - - - - - - - - - -+
|   PreFilterInvalid  | - - - -> scale domains
|(when scales need it)|
+- - - - - - - - - - -+
         |
         v
  Invalid Filter (if the main data source needs it)
         |
         v
   +----------+
   |   Main   | - - - -> scale domains
   +----------+
         |
         v
+- - - - - - - - - - -+
|   PostFilterInvalid | - - - -> scale domains
|(when scales need it)|
+- - - - - - - - - - -+
         |
         v
     +-------+
     | Facet |----> "column", "column-layout", and "row"
     +-------+
         |
         v
  ...Child data...
*/
function extension_parse_parseData(model) {
    let head = extension_parseRoot(model, model.component.data.sources);
    const { outputNodes, outputNodeRefCounts } = model.component.data;
    const data = model.data;
    const newData = data && (extension_isGenerator(data) || extension_isUrlData(data) || extension_isInlineData(data));
    const ancestorParse = !newData && model.parent ? model.parent.component.data.ancestorParse.clone() : new extension_AncestorParse();
    if (extension_isGenerator(data)) {
        // insert generator transform
        if (extension_isSequenceGenerator(data)) {
            head = new extension_SequenceNode(head, data.sequence);
        }
        else if (extension_isGraticuleGenerator(data)) {
            head = new extension_GraticuleNode(head, data.graticule);
        }
        // no parsing necessary for generator
        ancestorParse.parseNothing = true;
    }
    else if (data?.format?.parse === null) {
        // format.parse: null means disable parsing
        ancestorParse.parseNothing = true;
    }
    head = extension_ParseNode.makeExplicit(head, model, ancestorParse) ?? head;
    // Default discrete selections require an identifer transform to
    // uniquely identify data points. Add this transform at the head of
    // the pipeline such that the identifier field is available for all
    // subsequent datasets. During optimization, we will remove this
    // transform if it proves to be unnecessary. Additional identifier
    // transforms will be necessary when new tuples are constructed
    // (e.g., post-aggregation).
    head = new extension_IdentifierNode(head);
    // HACK: This is equivalent for merging bin extent for union scale.
    // FIXME(https://github.com/vega/vega-lite/issues/2270): Correctly merge extent / bin node for shared bin scale
    const parentIsLayer = model.parent && extension_isLayerModel(model.parent);
    if (extension_isUnitModel(model) || extension_isFacetModel(model)) {
        if (parentIsLayer) {
            head = extension_BinNode.makeFromEncoding(head, model) ?? head;
        }
    }
    if (model.transforms.length > 0) {
        head = extension_parseTransformArray(head, model, ancestorParse);
    }
    // create parse nodes for fields that need to be parsed (or flattened) implicitly
    const implicitSelection = extension_getImplicitFromSelection(model);
    const implicitEncoding = extension_getImplicitFromEncoding(model);
    head = extension_ParseNode.makeWithAncestors(head, {}, { ...implicitSelection, ...implicitEncoding }, ancestorParse) ?? head;
    if (extension_isUnitModel(model)) {
        head = extension_GeoJSONNode.parseAll(head, model);
        head = extension_GeoPointNode.parseAll(head, model);
    }
    if (extension_isUnitModel(model) || extension_isFacetModel(model)) {
        if (!parentIsLayer) {
            head = extension_BinNode.makeFromEncoding(head, model) ?? head;
        }
        head = extension_TimeUnitNode.makeFromEncoding(head, model) ?? head;
        head = extension_CalculateNode.parseAllForSortIndex(head, model);
    }
    // add an output node pre aggregation
    const raw = (head = extension_makeOutputNode(extension_DataSourceType.Raw, model, head));
    if (extension_isUnitModel(model)) {
        const agg = extension_AggregateNode.makeFromEncoding(head, model);
        if (agg) {
            head = agg;
            if (extension_requiresSelectionId(model)) {
                head = new extension_IdentifierNode(head);
            }
        }
        head = extension_ImputeNode.makeFromEncoding(head, model) ?? head;
        head = extension_StackNode.makeFromEncoding(head, model) ?? head;
    }
    let preFilterInvalid;
    let dataSourcesForHandlingInvalidValues;
    if (extension_isUnitModel(model)) {
        const { markDef, mark, config } = model;
        const invalid = extension_getMarkPropOrConfig('invalid', markDef, config);
        const { marks, scales } = (dataSourcesForHandlingInvalidValues = extension_getDataSourcesForHandlingInvalidValues({
            invalid,
            isPath: extension_isPathMark(mark)
        }));
        if (marks !== scales && scales === 'include-invalid-values') {
            // Create a seperate preFilterInvalid dataSource if scales need pre-filter data but marks needs post-filter.
            preFilterInvalid = head = extension_makeOutputNode(extension_DataSourceType.PreFilterInvalid, model, head);
        }
        if (marks === 'exclude-invalid-values') {
            head = extension_FilterInvalidNode.make(head, model, dataSourcesForHandlingInvalidValues) ?? head;
        }
    }
    // output "main" node for marks
    const main = (head = extension_makeOutputNode(extension_DataSourceType.Main, model, head));
    let postFilterInvalid;
    if (extension_isUnitModel(model) && dataSourcesForHandlingInvalidValues) {
        const { marks, scales } = dataSourcesForHandlingInvalidValues;
        if (marks === 'include-invalid-values' && scales === 'exclude-invalid-values') {
            // Create a seperate postFilterInvalid dataSource if scales need post-filter data but marks needs pre-filter.
            head = extension_FilterInvalidNode.make(head, model, dataSourcesForHandlingInvalidValues) ?? head;
            postFilterInvalid = head = extension_makeOutputNode(extension_DataSourceType.PostFilterInvalid, model, head);
        }
    }
    if (extension_isUnitModel(model)) {
        extension_materializeSelections(model, main);
    }
    // add facet marker
    let facetRoot = null;
    if (extension_isFacetModel(model)) {
        const facetName = model.getName('facet');
        // Derive new aggregate for facet's sort field
        // augment data source with new fields for crossed facet
        head = extension_makeJoinAggregateFromFacet(head, model.facet) ?? head;
        facetRoot = new extension_FacetNode(head, model, facetName, main.getSource());
        outputNodes[facetName] = facetRoot;
    }
    return {
        ...model.component.data,
        outputNodes,
        outputNodeRefCounts,
        raw,
        main,
        facetRoot,
        ancestorParse,
        preFilterInvalid,
        postFilterInvalid
    };
}
function extension_makeOutputNode(dataSourceType, model, head) {
    const { outputNodes, outputNodeRefCounts } = model.component.data;
    const name = model.getDataName(dataSourceType);
    const node = new extension_OutputNode(head, name, dataSourceType, outputNodeRefCounts);
    outputNodes[name] = node;
    return node;
}
//# sourceMappingURL=parse.js.map
;// ../../node_modules/vega-lite/build/src/compile/concat.js










class extension_ConcatModel extends extension_Model {
    constructor(spec, parent, parentGivenName, config) {
        super(spec, 'concat', parent, parentGivenName, config, spec.resolve);
        if (spec.resolve?.axis?.x === 'shared' || spec.resolve?.axis?.y === 'shared') {
            extension_log_warn(extension_CONCAT_CANNOT_SHARE_AXIS);
        }
        this.children = this.getChildren(spec).map((child, i) => {
            return extension_buildModel(child, this, this.getName(`concat_${i}`), undefined, config);
        });
    }
    parseData() {
        this.component.data = extension_parse_parseData(this);
        for (const child of this.children) {
            child.parseData();
        }
    }
    parseSelections() {
        // Merge selections up the hierarchy so that they may be referenced
        // across unit specs. Persist their definitions within each child
        // to assemble signals which remain within output Vega unit groups.
        this.component.selection = {};
        for (const child of this.children) {
            child.parseSelections();
            for (const key of extension_util_keys(child.component.selection)) {
                this.component.selection[key] = child.component.selection[key];
            }
        }
        if (Object.values(this.component.selection).some(selCmpt => extension_isTimerSelection(selCmpt))) {
            extension_log_error(extension_MULTI_VIEW_ANIMATION_UNSUPPORTED);
        }
    }
    parseMarkGroup() {
        for (const child of this.children) {
            child.parseMarkGroup();
        }
    }
    parseAxesAndHeaders() {
        for (const child of this.children) {
            child.parseAxesAndHeaders();
        }
        // TODO(#2415): support shared axes
    }
    getChildren(spec) {
        if (extension_isVConcatSpec(spec)) {
            return spec.vconcat;
        }
        else if (extension_isHConcatSpec(spec)) {
            return spec.hconcat;
        }
        return spec.concat;
    }
    parseLayoutSize() {
        extension_parseConcatLayoutSize(this);
    }
    parseAxisGroup() {
        return null;
    }
    assembleSelectionTopLevelSignals(signals) {
        return this.children.reduce((sg, child) => child.assembleSelectionTopLevelSignals(sg), signals);
    }
    assembleSignals() {
        this.children.forEach(child => child.assembleSignals());
        return [];
    }
    assembleLayoutSignals() {
        const layoutSignals = extension_assembleLayoutSignals(this);
        for (const child of this.children) {
            layoutSignals.push(...child.assembleLayoutSignals());
        }
        return layoutSignals;
    }
    assembleSelectionData(data) {
        return this.children.reduce((db, child) => child.assembleSelectionData(db), data);
    }
    assembleMarks() {
        // only children have marks
        return this.children.map(child => {
            const title = child.assembleTitle();
            const style = child.assembleGroupStyle();
            const encodeEntry = child.assembleGroupEncodeEntry(false);
            return {
                type: 'group',
                name: child.getName('group'),
                ...(title ? { title } : {}),
                ...(style ? { style } : {}),
                ...(encodeEntry ? { encode: { update: encodeEntry } } : {}),
                ...child.assembleGroup()
            };
        });
    }
    assembleGroupStyle() {
        return undefined;
    }
    assembleDefaultLayout() {
        const columns = this.layout.columns;
        return {
            ...(columns != null ? { columns } : {}),
            bounds: 'full',
            // Use align each so it can work with multiple plots with different size
            align: 'each'
        };
    }
}
//# sourceMappingURL=concat.js.map
;// ../../node_modules/vega-lite/build/src/compile/axis/component.js




function extension_isFalseOrNull(v) {
    return v === false || v === null;
}
const extension_AXIS_COMPONENT_PROPERTIES_INDEX = {
    disable: 1,
    gridScale: 1,
    scale: 1,
    ...extension_COMMON_AXIS_PROPERTIES_INDEX,
    labelExpr: 1,
    encode: 1
};
const extension_AXIS_COMPONENT_PROPERTIES = extension_util_keys(extension_AXIS_COMPONENT_PROPERTIES_INDEX);
class extension_AxisComponent extends extension_Split {
    constructor(explicit = {}, implicit = {}, mainExtracted = false) {
        super();
        this.explicit = explicit;
        this.implicit = implicit;
        this.mainExtracted = mainExtracted;
    }
    clone() {
        return new extension_AxisComponent(extension_duplicate(this.explicit), extension_duplicate(this.implicit), this.mainExtracted);
    }
    hasAxisPart(part) {
        // FIXME(https://github.com/vega/vega-lite/issues/2552) this method can be wrong if users use a Vega theme.
        if (part === 'axis') {
            // always has the axis container part
            return true;
        }
        if (part === 'grid' || part === 'title') {
            return !!this.get(part);
        }
        // Other parts are enabled by default, so they should not be false or null.
        return !extension_isFalseOrNull(this.get(part));
    }
    hasOrientSignalRef() {
        return extension_isSignalRef(this.explicit.orient);
    }
}
//# sourceMappingURL=component.js.map
;// ../../node_modules/vega-lite/build/src/compile/axis/encode.js



function extension_encode_labels(model, channel, specifiedLabelsSpec) {
    const { encoding, config } = model;
    const fieldOrDatumDef = extension_getFieldOrDatumDef(encoding[channel]) ?? extension_getFieldOrDatumDef(encoding[extension_getSecondaryRangeChannel(channel)]);
    const axis = model.axis(channel) || {};
    const { format, formatType } = axis;
    if (extension_isCustomFormatType(formatType)) {
        return {
            text: extension_formatCustomType({
                fieldOrDatumDef,
                field: 'datum.value',
                format,
                formatType,
                config
            }),
            ...specifiedLabelsSpec
        };
    }
    else if (format === undefined && formatType === undefined && config.customFormatTypes) {
        if (extension_channelDefType(fieldOrDatumDef) === 'quantitative') {
            if (extension_isPositionFieldOrDatumDef(fieldOrDatumDef) &&
                fieldOrDatumDef.stack === 'normalize' &&
                config.normalizedNumberFormatType) {
                return {
                    text: extension_formatCustomType({
                        fieldOrDatumDef,
                        field: 'datum.value',
                        format: config.normalizedNumberFormat,
                        formatType: config.normalizedNumberFormatType,
                        config
                    }),
                    ...specifiedLabelsSpec
                };
            }
            else if (config.numberFormatType) {
                return {
                    text: extension_formatCustomType({
                        fieldOrDatumDef,
                        field: 'datum.value',
                        format: config.numberFormat,
                        formatType: config.numberFormatType,
                        config
                    }),
                    ...specifiedLabelsSpec
                };
            }
        }
        if (extension_channelDefType(fieldOrDatumDef) === 'temporal' &&
            config.timeFormatType &&
            extension_isFieldDef(fieldOrDatumDef) &&
            !fieldOrDatumDef.timeUnit) {
            return {
                text: extension_formatCustomType({
                    fieldOrDatumDef,
                    field: 'datum.value',
                    format: config.timeFormat,
                    formatType: config.timeFormatType,
                    config
                }),
                ...specifiedLabelsSpec
            };
        }
    }
    return specifiedLabelsSpec;
}
//# sourceMappingURL=encode.js.map
;// ../../node_modules/vega-lite/build/src/compile/axis/parse.js














function extension_parseUnitAxes(model) {
    return extension_POSITION_SCALE_CHANNELS.reduce((axis, channel) => {
        if (model.component.scales[channel]) {
            axis[channel] = [extension_parse_parseAxis(channel, model)];
        }
        return axis;
    }, {});
}
const extension_OPPOSITE_ORIENT = {
    bottom: 'top',
    top: 'bottom',
    left: 'right',
    right: 'left'
};
function extension_parseLayerAxes(model) {
    const { axes, resolve } = model.component;
    const axisCount = { top: 0, bottom: 0, right: 0, left: 0 };
    for (const child of model.children) {
        child.parseAxesAndHeaders();
        for (const channel of extension_util_keys(child.component.axes)) {
            resolve.axis[channel] = extension_parseGuideResolve(model.component.resolve, channel);
            if (resolve.axis[channel] === 'shared') {
                // If the resolve says shared (and has not been overridden)
                // We will try to merge and see if there is a conflict
                axes[channel] = extension_mergeAxisComponents(axes[channel], child.component.axes[channel]);
                if (!axes[channel]) {
                    // If merge returns nothing, there is a conflict so we cannot make the axis shared.
                    // Thus, mark axis as independent and remove the axis component.
                    resolve.axis[channel] = 'independent';
                    delete axes[channel];
                }
            }
        }
    }
    // Move axes to layer's axis component and merge shared axes
    for (const channel of extension_POSITION_SCALE_CHANNELS) {
        for (const child of model.children) {
            if (!child.component.axes[channel]) {
                // skip if the child does not have a particular axis
                continue;
            }
            if (resolve.axis[channel] === 'independent') {
                // If axes are independent, concat the axisComponent array.
                axes[channel] = (axes[channel] ?? []).concat(child.component.axes[channel]);
                // Automatically adjust orient
                for (const axisComponent of child.component.axes[channel]) {
                    const { value: orient, explicit } = axisComponent.getWithExplicit('orient');
                    if (extension_isSignalRef(orient)) {
                        continue;
                    }
                    if (axisCount[orient] > 0 && !explicit) {
                        // Change axis orient if the number do not match
                        const oppositeOrient = extension_OPPOSITE_ORIENT[orient];
                        if (axisCount[orient] > axisCount[oppositeOrient]) {
                            axisComponent.set('orient', oppositeOrient, false);
                        }
                    }
                    axisCount[orient]++;
                    // TODO(https://github.com/vega/vega-lite/issues/2634): automatically add extra offset?
                }
            }
            // After merging, make sure to remove axes from child
            delete child.component.axes[channel];
        }
        // Show gridlines for first axis only for dual-axis chart
        if (resolve.axis[channel] === 'independent' && axes[channel] && axes[channel].length > 1) {
            for (const [index, axisCmpt] of (axes[channel] || []).entries()) {
                if (index > 0 && !!axisCmpt.get('grid') && !axisCmpt.explicit.grid) {
                    axisCmpt.implicit.grid = false;
                }
            }
        }
    }
}
function extension_mergeAxisComponents(mergedAxisCmpts, childAxisCmpts) {
    if (mergedAxisCmpts) {
        // FIXME: this is a bit wrong once we support multiple axes
        if (mergedAxisCmpts.length !== childAxisCmpts.length) {
            return undefined; // Cannot merge axis component with different number of axes.
        }
        const length = mergedAxisCmpts.length;
        for (let i = 0; i < length; i++) {
            const merged = mergedAxisCmpts[i];
            const child = childAxisCmpts[i];
            if (!!merged !== !!child) {
                return undefined;
            }
            else if (merged && child) {
                const mergedOrient = merged.getWithExplicit('orient');
                const childOrient = child.getWithExplicit('orient');
                if (mergedOrient.explicit && childOrient.explicit && mergedOrient.value !== childOrient.value) {
                    // TODO: throw warning if resolve is explicit (We don't have info about explicit/implicit resolve yet.)
                    // Cannot merge due to inconsistent orient
                    return undefined;
                }
                else {
                    mergedAxisCmpts[i] = extension_mergeAxisComponent(merged, child);
                }
            }
        }
    }
    else {
        // For first one, return a copy of the child
        return childAxisCmpts.map(axisComponent => axisComponent.clone());
    }
    return mergedAxisCmpts;
}
function extension_mergeAxisComponent(merged, child) {
    for (const prop of extension_AXIS_COMPONENT_PROPERTIES) {
        const mergedValueWithExplicit = extension_mergeValuesWithExplicit(merged.getWithExplicit(prop), child.getWithExplicit(prop), prop, 'axis', 
        // Tie breaker function
        (v1, v2) => {
            switch (prop) {
                case 'title':
                    return extension_mergeTitleComponent(v1, v2);
                case 'gridScale':
                    return {
                        explicit: v1.explicit, // keep the old explicit
                        value: extension_getFirstDefined(v1.value, v2.value)
                    };
            }
            return extension_defaultTieBreaker(v1, v2, prop, 'axis');
        });
        merged.setWithExplicit(prop, mergedValueWithExplicit);
    }
    return merged;
}
function extension_parse_isExplicit(value, property, axis, model, channel) {
    if (property === 'disable') {
        return axis !== undefined; // if axis is specified or null/false, then its enable/disable state is explicit
    }
    axis = axis || {};
    switch (property) {
        case 'titleAngle':
        case 'labelAngle':
            return value === (extension_isSignalRef(axis.labelAngle) ? axis.labelAngle : extension_normalizeAngle(axis.labelAngle));
        case 'values':
            return !!axis.values;
        // specified axis.values is already respected, but may get transformed.
        case 'encode':
            // both VL axis.encoding and axis.labelAngle affect VG axis.encode
            return !!axis.encoding || !!axis.labelAngle;
        case 'title':
            // title can be explicit if fieldDef.title is set
            if (value === extension_getFieldDefTitle(model, channel)) {
                return true;
            }
    }
    // Otherwise, things are explicit if the returned value matches the specified property
    return value === axis[property];
}
/**
 * Properties to always include values from config
 */
const extension_propsToAlwaysIncludeConfig = new Set([
    'grid', // Grid is an exception because we need to set grid = true to generate another grid axis
    'translate', // translate has dependent logic for bar's bin position and it's 0.5 by default in Vega. If a config overrides this value, we need to know.
    // the rest are not axis configs in Vega, but are in VL, so we need to set too.
    'format',
    'formatType',
    'orient',
    'labelExpr',
    'tickCount',
    'position',
    'tickMinStep'
]);
function extension_parse_parseAxis(channel, model) {
    let axis = model.axis(channel);
    const axisComponent = new extension_AxisComponent();
    const fieldOrDatumDef = extension_getFieldOrDatumDef(model.encoding[channel]);
    const { mark, config } = model;
    const orient = axis?.orient ||
        config[channel === 'x' ? 'axisX' : 'axisY']?.orient ||
        config.axis?.orient ||
        extension_defaultOrient(channel);
    const scaleType = model.getScaleComponent(channel).get('type');
    const axisConfigs = extension_getAxisConfigs(channel, scaleType, orient, model.config);
    const disable = axis !== undefined ? !axis : extension_getAxisConfig('disable', config.style, axis?.style, axisConfigs).configValue;
    axisComponent.set('disable', disable, axis !== undefined);
    if (disable) {
        return axisComponent;
    }
    axis = axis || {};
    const labelAngle = extension_getLabelAngle(fieldOrDatumDef, axis, channel, config.style, axisConfigs);
    const formatType = extension_guideFormatType(axis.formatType, fieldOrDatumDef, scaleType);
    const format = extension_guideFormat(fieldOrDatumDef, fieldOrDatumDef.type, axis.format, axis.formatType, config, true);
    const ruleParams = {
        fieldOrDatumDef,
        axis,
        channel,
        model,
        scaleType,
        orient,
        labelAngle,
        format,
        formatType,
        mark,
        config
    };
    // 1.2. Add properties
    for (const property of extension_AXIS_COMPONENT_PROPERTIES) {
        const value = property in extension_axisRules ? extension_axisRules[property](ruleParams) : extension_isAxisProperty(property) ? axis[property] : undefined;
        const hasValue = value !== undefined;
        const explicit = extension_parse_isExplicit(value, property, axis, model, channel);
        if (hasValue && explicit) {
            axisComponent.set(property, value, explicit);
        }
        else {
            const { configValue = undefined, configFrom = undefined } = extension_isAxisProperty(property) && property !== 'values'
                ? extension_getAxisConfig(property, config.style, axis.style, axisConfigs)
                : {};
            const hasConfigValue = configValue !== undefined;
            if (hasValue && !hasConfigValue) {
                // only set property if it is explicitly set or has no config value (otherwise we will accidentally override config)
                axisComponent.set(property, value, explicit);
            }
            else if (
            // Cases need implicit values
            // 1. Axis config that aren't available in Vega
            !(configFrom === 'vgAxisConfig') ||
                // 2. Certain properties are always included (see `propsToAlwaysIncludeConfig`'s declaration for more details)
                (extension_propsToAlwaysIncludeConfig.has(property) && hasConfigValue) ||
                // 3. Conditional axis values and signals
                extension_isConditionalAxisValue(configValue) ||
                extension_isSignalRef(configValue)) {
                // If a config is specified and is conditional, copy conditional value from axis config
                axisComponent.set(property, configValue, false);
            }
        }
    }
    // 2) Add guide encode definition groups
    const axisEncoding = axis.encoding ?? {};
    const axisEncode = extension_AXIS_PARTS.reduce((e, part) => {
        if (!axisComponent.hasAxisPart(part)) {
            // No need to create encode for a disabled part.
            return e;
        }
        const axisEncodingPart = extension_guideEncodeEntry(axisEncoding[part] ?? {}, model);
        const value = part === 'labels' ? extension_encode_labels(model, channel, axisEncodingPart) : axisEncodingPart;
        if (value !== undefined && !extension_isEmpty(value)) {
            e[part] = { update: value };
        }
        return e;
    }, {});
    // FIXME: By having encode as one property, we won't have fine grained encode merging.
    if (!extension_isEmpty(axisEncode)) {
        axisComponent.set('encode', axisEncode, !!axis.encoding || axis.labelAngle !== undefined);
    }
    return axisComponent;
}
//# sourceMappingURL=parse.js.map
;// ../../node_modules/vega-lite/build/src/compile/layoutsize/init.js




function extension_initLayoutSize({ encoding, size }) {
    for (const channel of extension_POSITION_SCALE_CHANNELS) {
        const sizeType = extension_getSizeChannel(channel);
        if (extension_isStep(size[sizeType])) {
            if (extension_isContinuousFieldOrDatumDef(encoding[channel])) {
                delete size[sizeType];
                extension_log_warn(extension_stepDropped(sizeType));
            }
        }
    }
    return size;
}
//# sourceMappingURL=init.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/arc.js

const extension_arc_arc = {
    vgMark: 'arc',
    encodeEntry: (model) => {
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'ignore',
                baseline: 'ignore',
                color: 'include',
                size: 'ignore',
                orient: 'ignore',
                theta: 'ignore'
            }),
            ...extension_pointPosition('x', model, { defaultPos: 'mid' }),
            ...extension_pointPosition('y', model, { defaultPos: 'mid' }),
            // arcs are rectangles in polar coordinates
            ...extension_rectPosition(model, 'radius'),
            ...extension_rectPosition(model, 'theta')
        };
    }
};
//# sourceMappingURL=arc.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/area.js

const extension_area_area = {
    vgMark: 'area',
    encodeEntry: (model) => {
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'ignore',
                baseline: 'ignore',
                color: 'include',
                orient: 'include',
                size: 'ignore',
                theta: 'ignore'
            }),
            ...extension_pointOrRangePosition('x', model, {
                defaultPos: 'zeroOrMin',
                defaultPos2: 'zeroOrMin',
                range: model.markDef.orient === 'horizontal'
            }),
            ...extension_pointOrRangePosition('y', model, {
                defaultPos: 'zeroOrMin',
                defaultPos2: 'zeroOrMin',
                range: model.markDef.orient === 'vertical'
            }),
            ...extension_defined(model)
        };
    }
};
//# sourceMappingURL=area.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/bar.js

const extension_bar = {
    vgMark: 'rect',
    encodeEntry: (model) => {
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'ignore',
                baseline: 'ignore',
                color: 'include',
                orient: 'ignore',
                size: 'ignore',
                theta: 'ignore'
            }),
            ...extension_rectPosition(model, 'x'),
            ...extension_rectPosition(model, 'y')
        };
    }
};
//# sourceMappingURL=bar.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/geoshape.js



const extension_geoshape = {
    vgMark: 'shape',
    encodeEntry: (model) => {
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'ignore',
                baseline: 'ignore',
                color: 'include',
                size: 'ignore',
                orient: 'ignore',
                theta: 'ignore'
            })
        };
    },
    postEncodingTransform: (model) => {
        const { encoding } = model;
        const shapeDef = encoding.shape;
        const transform = {
            type: 'geoshape',
            projection: model.projectionName(),
            // as: 'shape',
            ...(shapeDef && extension_isFieldDef(shapeDef) && shapeDef.type === extension_GEOJSON
                ? { field: extension_vgField(shapeDef, { expr: 'datum' }) }
                : {})
        };
        return [transform];
    }
};
//# sourceMappingURL=geoshape.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/image.js

const extension_image_image = {
    vgMark: 'image',
    encodeEntry: (model) => {
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'ignore',
                baseline: 'ignore',
                color: 'ignore',
                orient: 'ignore',
                size: 'ignore',
                theta: 'ignore'
            }),
            ...extension_rectPosition(model, 'x'),
            ...extension_rectPosition(model, 'y'),
            ...extension_text_text(model, 'url')
        };
    }
};
//# sourceMappingURL=image.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/line.js

const extension_line_line = {
    vgMark: 'line',
    encodeEntry: (model) => {
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'ignore',
                baseline: 'ignore',
                color: 'include',
                size: 'ignore',
                orient: 'ignore',
                theta: 'ignore'
            }),
            ...extension_pointPosition('x', model, { defaultPos: 'mid' }),
            ...extension_pointPosition('y', model, { defaultPos: 'mid' }),
            ...extension_nonPosition('size', model, {
                vgChannel: 'strokeWidth' // VL's line size is strokeWidth
            }),
            ...extension_defined(model)
        };
    }
};
const extension_line_trail = {
    vgMark: 'trail',
    encodeEntry: (model) => {
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'ignore',
                baseline: 'ignore',
                color: 'include',
                size: 'include',
                orient: 'ignore',
                theta: 'ignore'
            }),
            ...extension_pointPosition('x', model, { defaultPos: 'mid' }),
            ...extension_pointPosition('y', model, { defaultPos: 'mid' }),
            ...extension_nonPosition('size', model),
            ...extension_defined(model)
        };
    }
};
//# sourceMappingURL=line.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/point.js

function extension_encodeEntry(model, fixedShape) {
    const { config } = model;
    return {
        ...extension_baseEncodeEntry(model, {
            align: 'ignore',
            baseline: 'ignore',
            color: 'include',
            size: 'include',
            orient: 'ignore',
            theta: 'ignore'
        }),
        ...extension_pointPosition('x', model, { defaultPos: 'mid' }),
        ...extension_pointPosition('y', model, { defaultPos: 'mid' }),
        ...extension_nonPosition('size', model),
        ...extension_nonPosition('angle', model),
        ...extension_shapeMixins(model, config, fixedShape)
    };
}
function extension_shapeMixins(model, config, fixedShape) {
    if (fixedShape) {
        return { shape: { value: fixedShape } };
    }
    return extension_nonPosition('shape', model);
}
const extension_mark_point_point = {
    vgMark: 'symbol',
    encodeEntry: (model) => {
        return extension_encodeEntry(model);
    }
};
const extension_point_circle = {
    vgMark: 'symbol',
    encodeEntry: (model) => {
        return extension_encodeEntry(model, 'circle');
    }
};
const extension_point_square = {
    vgMark: 'symbol',
    encodeEntry: (model) => {
        return extension_encodeEntry(model, 'square');
    }
};
//# sourceMappingURL=point.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/rect.js

const extension_rect_rect = {
    vgMark: 'rect',
    encodeEntry: (model) => {
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'ignore',
                baseline: 'ignore',
                color: 'include',
                orient: 'ignore',
                size: 'ignore',
                theta: 'ignore'
            }),
            ...extension_rectPosition(model, 'x'),
            ...extension_rectPosition(model, 'y')
        };
    }
};
//# sourceMappingURL=rect.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/rule.js

const extension_rule_rule = {
    vgMark: 'rule',
    encodeEntry: (model) => {
        const { markDef } = model;
        const orient = markDef.orient;
        if (!model.encoding.x && !model.encoding.y && !model.encoding.latitude && !model.encoding.longitude) {
            // Show nothing if we have none of x, y, lat, and long.
            return {};
        }
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'ignore',
                baseline: 'ignore',
                color: 'include',
                orient: 'ignore',
                size: 'ignore',
                theta: 'ignore'
            }),
            ...extension_pointOrRangePosition('x', model, {
                defaultPos: orient === 'horizontal' ? 'zeroOrMax' : 'mid',
                defaultPos2: 'zeroOrMin',
                range: orient !== 'vertical' // include x2 for horizontal or line segment rule
            }),
            ...extension_pointOrRangePosition('y', model, {
                defaultPos: orient === 'vertical' ? 'zeroOrMax' : 'mid',
                defaultPos2: 'zeroOrMin',
                range: orient !== 'horizontal' // include y2 for vertical or line segment rule
            }),
            ...extension_nonPosition('size', model, {
                vgChannel: 'strokeWidth' // VL's rule size is strokeWidth
            })
        };
    }
};
//# sourceMappingURL=rule.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/text.js


const extension_mark_text_text = {
    vgMark: 'text',
    encodeEntry: (model) => {
        const { config, encoding } = model;
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'include',
                baseline: 'include',
                color: 'include',
                size: 'ignore',
                orient: 'ignore',
                theta: 'include'
            }),
            ...extension_pointPosition('x', model, { defaultPos: 'mid' }),
            ...extension_pointPosition('y', model, { defaultPos: 'mid' }),
            ...extension_text_text(model),
            ...extension_nonPosition('size', model, {
                vgChannel: 'fontSize' // VL's text size is fontSize
            }),
            ...extension_nonPosition('angle', model),
            ...extension_valueIfDefined('align', extension_align(model.markDef, encoding, config)),
            ...extension_valueIfDefined('baseline', extension_text_baseline(model.markDef, encoding, config)),
            ...extension_pointPosition('radius', model, { defaultPos: null }),
            ...extension_pointPosition('theta', model, { defaultPos: null })
        };
    }
};
function extension_align(markDef, encoding, config) {
    const a = extension_getMarkPropOrConfig('align', markDef, config);
    if (a === undefined) {
        return 'center';
    }
    // If there is a config, Vega-parser will process this already.
    return undefined;
}
function extension_text_baseline(markDef, encoding, config) {
    const b = extension_getMarkPropOrConfig('baseline', markDef, config);
    if (b === undefined) {
        return 'middle';
    }
    // If there is a config, Vega-parser will process this already.
    return undefined;
}
//# sourceMappingURL=text.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/tick.js


const extension_tick_tick = {
    vgMark: 'rect',
    encodeEntry: (model) => {
        const { config, markDef } = model;
        const orient = markDef.orient;
        const vgSizeAxisChannel = orient === 'horizontal' ? 'x' : 'y';
        const vgThicknessAxisChannel = orient === 'horizontal' ? 'y' : 'x';
        const vgThicknessChannel = orient === 'horizontal' ? 'height' : 'width';
        return {
            ...extension_baseEncodeEntry(model, {
                align: 'ignore',
                baseline: 'ignore',
                color: 'include',
                orient: 'ignore',
                size: 'ignore',
                theta: 'ignore'
            }),
            ...extension_rectPosition(model, vgSizeAxisChannel),
            ...extension_pointPosition(vgThicknessAxisChannel, model, {
                defaultPos: 'mid',
                vgChannel: vgThicknessAxisChannel === 'y' ? 'yc' : 'xc'
            }),
            [vgThicknessChannel]: extension_signalOrValueRef(extension_getMarkPropOrConfig('thickness', markDef, config))
        };
    }
};
//# sourceMappingURL=tick.js.map
;// ../../node_modules/vega-lite/build/src/compile/mark/mark.js



















const extension_markCompiler = {
    arc: extension_arc_arc,
    area: extension_area_area,
    bar: extension_bar,
    circle: extension_point_circle,
    geoshape: extension_geoshape,
    image: extension_image_image,
    line: extension_line_line,
    point: extension_mark_point_point,
    rect: extension_rect_rect,
    rule: extension_rule_rule,
    square: extension_point_square,
    text: extension_mark_text_text,
    tick: extension_tick_tick,
    trail: extension_line_trail
};
function extension_parseMarkGroups(model) {
    if (extension_util_contains([extension_LINE, extension_AREA, extension_TRAIL], model.mark)) {
        const details = extension_pathGroupingFields(model.mark, model.encoding);
        if (details.length > 0) {
            return extension_getPathGroups(model, details);
        }
        // otherwise use standard mark groups
    }
    else if (model.mark === extension_BAR) {
        const hasCornerRadius = extension_VG_CORNERRADIUS_CHANNELS.some(prop => extension_getMarkPropOrConfig(prop, model.markDef, model.config));
        if (model.stack && !model.fieldDef('size') && hasCornerRadius) {
            return extension_getGroupsForStackedBarWithCornerRadius(model);
        }
    }
    return extension_getMarkGroup(model);
}
const extension_FACETED_PATH_PREFIX = 'faceted_path_';
function extension_getPathGroups(model, details) {
    // TODO: for non-stacked plot, map order to zindex. (Maybe rename order for layer to zindex?)
    return [
        {
            name: model.getName('pathgroup'),
            type: 'group',
            from: {
                facet: {
                    name: extension_FACETED_PATH_PREFIX + model.requestDataName(extension_DataSourceType.Main),
                    data: model.requestDataName(extension_DataSourceType.Main),
                    groupby: details
                }
            },
            encode: {
                update: {
                    width: { field: { group: 'width' } },
                    height: { field: { group: 'height' } }
                }
            },
            // With subfacet for line/area group, need to use faceted data from above.
            marks: extension_getMarkGroup(model, { fromPrefix: extension_FACETED_PATH_PREFIX })
        }
    ];
}
const extension_STACK_GROUP_PREFIX = 'stack_group_';
/**
 * We need to put stacked bars into groups in order to enable cornerRadius for stacks.
 * If stack is used and the model doesn't have size encoding, we put the mark into groups,
 * and apply cornerRadius properties at the group.
 */
function extension_getGroupsForStackedBarWithCornerRadius(model) {
    // Generate the mark
    const [mark] = extension_getMarkGroup(model, { fromPrefix: extension_STACK_GROUP_PREFIX });
    // Get the scale for the stacked field
    const fieldScale = model.scaleName(model.stack.fieldChannel);
    const stackField = (opt = {}) => model.vgField(model.stack.fieldChannel, opt);
    // Find the min/max of the pixel value on the stacked direction
    const stackFieldGroup = (func, expr) => {
        const vgFieldMinMax = [
            stackField({ prefix: 'min', suffix: 'start', expr }),
            stackField({ prefix: 'max', suffix: 'start', expr }),
            stackField({ prefix: 'min', suffix: 'end', expr }),
            stackField({ prefix: 'max', suffix: 'end', expr })
        ];
        return `${func}(${vgFieldMinMax.map(field => `scale('${fieldScale}',${field})`).join(',')})`;
    };
    let groupUpdate;
    let innerGroupUpdate;
    // Build the encoding for group and an inner group
    if (model.stack.fieldChannel === 'x') {
        // Move cornerRadius, y/yc/y2/height properties to group
        // Group x/x2 should be the min/max of the marks within
        groupUpdate = {
            ...extension_util_pick(mark.encode.update, ['y', 'yc', 'y2', 'height', ...extension_VG_CORNERRADIUS_CHANNELS]),
            x: { signal: stackFieldGroup('min', 'datum') },
            x2: { signal: stackFieldGroup('max', 'datum') },
            clip: { value: true }
        };
        // Inner group should revert the x translation, and pass height through
        innerGroupUpdate = {
            x: { field: { group: 'x' }, mult: -1 },
            height: { field: { group: 'height' } }
        };
        // The marks should use the same height as group, without y/yc/y2 properties (because it's already done by group)
        // This is why size encoding is not supported yet
        mark.encode.update = {
            ...extension_omit(mark.encode.update, ['y', 'yc', 'y2']),
            height: { field: { group: 'height' } }
        };
    }
    else {
        groupUpdate = {
            ...extension_util_pick(mark.encode.update, ['x', 'xc', 'x2', 'width']),
            y: { signal: stackFieldGroup('min', 'datum') },
            y2: { signal: stackFieldGroup('max', 'datum') },
            clip: { value: true }
        };
        innerGroupUpdate = {
            y: { field: { group: 'y' }, mult: -1 },
            width: { field: { group: 'width' } }
        };
        mark.encode.update = {
            ...extension_omit(mark.encode.update, ['x', 'xc', 'x2']),
            width: { field: { group: 'width' } }
        };
    }
    // Deal with cornerRadius properties
    for (const key of extension_VG_CORNERRADIUS_CHANNELS) {
        const configValue = extension_getMarkConfig(key, model.markDef, model.config);
        // Move from mark to group
        if (mark.encode.update[key]) {
            groupUpdate[key] = mark.encode.update[key];
            delete mark.encode.update[key];
        }
        else if (configValue) {
            groupUpdate[key] = extension_signalOrValueRef(configValue);
        }
        // Overwrite any cornerRadius on mark set by config --- they are already moved to the group
        if (configValue) {
            mark.encode.update[key] = { value: 0 };
        }
    }
    const groupby = [];
    if (model.stack.groupbyChannels?.length > 0) {
        for (const groupbyChannel of model.stack.groupbyChannels) {
            // For bin and time unit, we have to add bin/timeunit -end channels.
            const groupByField = model.fieldDef(groupbyChannel);
            const field = extension_vgField(groupByField);
            if (field) {
                groupby.push(field);
            }
            if (groupByField?.bin || groupByField?.timeUnit) {
                groupby.push(extension_vgField(groupByField, { binSuffix: 'end' }));
            }
        }
    }
    const strokeProperties = [
        'stroke',
        'strokeWidth',
        'strokeJoin',
        'strokeCap',
        'strokeDash',
        'strokeDashOffset',
        'strokeMiterLimit',
        'strokeOpacity'
    ];
    // Generate stroke properties for the group
    groupUpdate = strokeProperties.reduce((encode, prop) => {
        if (mark.encode.update[prop]) {
            return { ...encode, [prop]: mark.encode.update[prop] };
        }
        else {
            const configValue = extension_getMarkConfig(prop, model.markDef, model.config);
            if (configValue !== undefined) {
                return { ...encode, [prop]: extension_signalOrValueRef(configValue) };
            }
            else {
                return encode;
            }
        }
    }, groupUpdate);
    // Apply strokeForeground and strokeOffset if stroke is used
    if (groupUpdate.stroke) {
        groupUpdate.strokeForeground = { value: true };
        groupUpdate.strokeOffset = { value: 0 };
    }
    return [
        {
            type: 'group',
            from: {
                facet: {
                    data: model.requestDataName(extension_DataSourceType.Main),
                    name: extension_STACK_GROUP_PREFIX + model.requestDataName(extension_DataSourceType.Main),
                    groupby,
                    aggregate: {
                        fields: [
                            stackField({ suffix: 'start' }),
                            stackField({ suffix: 'start' }),
                            stackField({ suffix: 'end' }),
                            stackField({ suffix: 'end' })
                        ],
                        ops: ['min', 'max', 'min', 'max']
                    }
                }
            },
            encode: {
                update: groupUpdate
            },
            marks: [
                {
                    type: 'group',
                    encode: { update: innerGroupUpdate },
                    marks: [mark]
                }
            ]
        }
    ];
}
function extension_mark_getSort(model) {
    const { encoding, stack, mark, markDef, config } = model;
    const order = encoding.order;
    if ((!extension_vega_util_module_isArray(order) && extension_isValueDef(order) && extension_isNullOrFalse(order.value)) ||
        (!order && extension_isNullOrFalse(extension_getMarkPropOrConfig('order', markDef, config)))) {
        return undefined;
    }
    else if ((extension_vega_util_module_isArray(order) || extension_isFieldDef(order)) && !stack) {
        // Sort by the order field if it is specified and the field is not stacked. (For stacked field, order specify stack order.)
        return extension_sortParams(order, { expr: 'datum' });
    }
    else if (extension_isPathMark(mark)) {
        // For both line and area, we sort values based on dimension by default
        const dimensionChannel = markDef.orient === 'horizontal' ? 'y' : 'x';
        const dimensionChannelDef = encoding[dimensionChannel];
        if (extension_isFieldDef(dimensionChannelDef)) {
            return { field: dimensionChannel };
        }
    }
    return undefined;
}
function extension_getMarkGroup(model, opt = { fromPrefix: '' }) {
    const { mark, markDef, encoding, config } = model;
    const clip = extension_getFirstDefined(markDef.clip, extension_scaleClip(model), extension_projectionClip(model));
    const style = extension_common_getStyles(markDef);
    const key = encoding.key;
    const sort = extension_mark_getSort(model);
    const interactive = extension_interactiveFlag(model);
    const aria = extension_getMarkPropOrConfig('aria', markDef, config);
    const postEncodingTransform = extension_markCompiler[mark].postEncodingTransform
        ? extension_markCompiler[mark].postEncodingTransform(model)
        : null;
    return [
        {
            name: model.getName('marks'),
            type: extension_markCompiler[mark].vgMark,
            ...(clip ? { clip } : {}),
            ...(style ? { style } : {}),
            ...(key ? { key: key.field } : {}),
            ...(sort ? { sort } : {}),
            ...(interactive ? interactive : {}),
            ...(aria === false ? { aria } : {}),
            from: { data: opt.fromPrefix + model.requestDataName(extension_DataSourceType.Main) },
            encode: {
                update: extension_markCompiler[mark].encodeEntry(model)
            },
            ...(postEncodingTransform
                ? {
                    transform: postEncodingTransform
                }
                : {})
        }
    ];
}
/**
 * If scales are bound to interval selections, we want to automatically clip
 * marks to account for panning/zooming interactions. We identify bound scales
 * by the selectionExtent property, which gets added during scale parsing.
 */
function extension_scaleClip(model) {
    const xScale = model.getScaleComponent('x');
    const yScale = model.getScaleComponent('y');
    return xScale?.get('selectionExtent') || yScale?.get('selectionExtent') ? true : undefined;
}
/**
 * If we use a custom projection with auto-fitting to the geodata extent,
 * we need to clip to ensure the chart size doesn't explode.
 */
function extension_projectionClip(model) {
    const projection = model.component.projection;
    return projection && !projection.isFit ? true : undefined;
}
/**
 * Only output interactive flags if we have selections defined somewhere in our model hierarchy.
 */
function extension_interactiveFlag(model) {
    if (!model.component.selection)
        return null;
    const unitCount = extension_util_keys(model.component.selection).length;
    let parentCount = unitCount;
    let parent = model.parent;
    while (parent && parentCount === 0) {
        parentCount = extension_util_keys(parent.component.selection).length;
        parent = parent.parent;
    }
    return parentCount
        ? {
            interactive: unitCount > 0 || model.mark === 'geoshape' || !!model.encoding.tooltip || !!model.markDef.tooltip
        }
        : null;
}
//# sourceMappingURL=mark.js.map
;// ../../node_modules/vega-lite/build/src/compile/unit.js


























/**
 * Internal model of Vega-Lite specification for the compiler.
 */
class extension_UnitModel extends extension_ModelWithField {
    constructor(spec, parent, parentGivenName, parentGivenSize = {}, config) {
        super(spec, 'unit', parent, parentGivenName, config, undefined, extension_isFrameMixins(spec) ? spec.view : undefined);
        this.specifiedScales = {};
        this.specifiedAxes = {};
        this.specifiedLegends = {};
        this.specifiedProjection = {};
        this.selection = [];
        this.children = [];
        /**
         * Corrects the data references in marks after assemble.
         */
        this.correctDataNames = (mark) => {
            // for normal data references
            if (mark.from?.data) {
                mark.from.data = this.lookupDataSource(mark.from.data);
                if ('time' in this.encoding) {
                    mark.from.data = mark.from.data + extension_CURR;
                }
            }
            // for access to facet data
            if (mark.from?.facet?.data) {
                mark.from.facet.data = this.lookupDataSource(mark.from.facet.data);
                // TOOD(jzong) uncomment this when it's time to implement facet animation
                // if ('time' in this.encoding) {
                //   mark.from.facet.data = mark.from.facet.data + CURR;
                // }
            }
            return mark;
        };
        const markDef = extension_isMarkDef(spec.mark) ? { ...spec.mark } : { type: spec.mark };
        const mark = markDef.type;
        // Need to init filled before other mark properties because encoding depends on filled but other mark properties depend on types inside encoding
        if (markDef.filled === undefined) {
            markDef.filled = extension_defaultFilled(markDef, config, {
                graticule: spec.data && extension_isGraticuleGenerator(spec.data)
            });
        }
        const encoding = (this.encoding = extension_initEncoding(spec.encoding || {}, mark, markDef.filled, config));
        this.markDef = extension_initMarkdef(markDef, encoding, config);
        this.size = extension_initLayoutSize({
            encoding,
            size: extension_isFrameMixins(spec)
                ? {
                    ...parentGivenSize,
                    ...(spec.width ? { width: spec.width } : {}),
                    ...(spec.height ? { height: spec.height } : {})
                }
                : parentGivenSize
        });
        // calculate stack properties
        this.stack = extension_stack(this.markDef, encoding);
        this.specifiedScales = this.initScales(mark, encoding);
        this.specifiedAxes = this.initAxes(encoding);
        this.specifiedLegends = this.initLegends(encoding);
        this.specifiedProjection = spec.projection;
        // Selections will be initialized upon parse.
        this.selection = (spec.params ?? []).filter(p => extension_isSelectionParameter(p));
    }
    get hasProjection() {
        const { encoding } = this;
        const isGeoShapeMark = this.mark === extension_GEOSHAPE;
        const hasGeoPosition = encoding && extension_GEOPOSITION_CHANNELS.some(channel => extension_isFieldOrDatumDef(encoding[channel]));
        return isGeoShapeMark || hasGeoPosition;
    }
    /**
     * Return specified Vega-Lite scale domain for a particular channel
     * @param channel
     */
    scaleDomain(channel) {
        const scale = this.specifiedScales[channel];
        return scale ? scale.domain : undefined;
    }
    axis(channel) {
        return this.specifiedAxes[channel];
    }
    legend(channel) {
        return this.specifiedLegends[channel];
    }
    initScales(mark, encoding) {
        return extension_SCALE_CHANNELS.reduce((scales, channel) => {
            const fieldOrDatumDef = extension_getFieldOrDatumDef(encoding[channel]);
            if (fieldOrDatumDef) {
                scales[channel] = this.initScale(fieldOrDatumDef.scale ?? {});
            }
            return scales;
        }, {});
    }
    initScale(scale) {
        const { domain, range } = scale;
        // TODO: we could simplify this function if we had a recursive replace function
        const scaleInternal = extension_replaceExprRef(scale);
        if (extension_vega_util_module_isArray(domain)) {
            scaleInternal.domain = domain.map(extension_signalRefOrValue);
        }
        if (extension_vega_util_module_isArray(range)) {
            scaleInternal.range = range.map(extension_signalRefOrValue);
        }
        return scaleInternal;
    }
    initAxes(encoding) {
        return extension_POSITION_SCALE_CHANNELS.reduce((_axis, channel) => {
            // Position Axis
            // TODO: handle ConditionFieldDef
            const channelDef = encoding[channel];
            if (extension_isFieldOrDatumDef(channelDef) ||
                (channel === extension_channel_X && extension_isFieldOrDatumDef(encoding.x2)) ||
                (channel === extension_channel_Y && extension_isFieldOrDatumDef(encoding.y2))) {
                const axisSpec = extension_isFieldOrDatumDef(channelDef) ? channelDef.axis : undefined;
                _axis[channel] = axisSpec
                    ? this.initAxis({ ...axisSpec }) // convert truthy value to object
                    : axisSpec;
            }
            return _axis;
        }, {});
    }
    initAxis(axis) {
        const props = extension_util_keys(axis);
        const axisInternal = {};
        for (const prop of props) {
            const val = axis[prop];
            axisInternal[prop] = extension_isConditionalAxisValue(val)
                ? extension_signalOrValueRefWithCondition(val)
                : extension_signalRefOrValue(val);
        }
        return axisInternal;
    }
    initLegends(encoding) {
        return extension_NONPOSITION_SCALE_CHANNELS.reduce((_legend, channel) => {
            const fieldOrDatumDef = extension_getFieldOrDatumDef(encoding[channel]);
            if (fieldOrDatumDef && extension_supportLegend(channel)) {
                const legend = fieldOrDatumDef.legend;
                _legend[channel] = legend
                    ? extension_replaceExprRef(legend) // convert truthy value to object
                    : legend;
            }
            return _legend;
        }, {});
    }
    parseData() {
        this.component.data = extension_parse_parseData(this);
    }
    parseLayoutSize() {
        extension_parseUnitLayoutSize(this);
    }
    parseSelections() {
        this.component.selection = extension_parseUnitSelection(this, this.selection);
    }
    parseMarkGroup() {
        this.component.mark = extension_parseMarkGroups(this);
    }
    parseAxesAndHeaders() {
        this.component.axes = extension_parseUnitAxes(this);
    }
    assembleSelectionTopLevelSignals(signals) {
        return extension_assembleTopLevelSignals(this, signals);
    }
    assembleSignals() {
        return [...extension_assembleAxisSignals(this), ...extension_assembleUnitSelectionSignals(this, [])];
    }
    assembleSelectionData(data) {
        return extension_assembleUnitSelectionData(this, data);
    }
    assembleLayout() {
        return null;
    }
    assembleLayoutSignals() {
        return extension_assembleLayoutSignals(this);
    }
    assembleMarks() {
        let marks = this.component.mark ?? [];
        // If this unit is part of a layer, selections should augment
        // all in concert rather than each unit individually. This
        // ensures correct interleaving of clipping and brushed marks.
        if (!this.parent || !extension_isLayerModel(this.parent)) {
            marks = extension_assembleUnitSelectionMarks(this, marks);
        }
        return marks.map(this.correctDataNames);
    }
    assembleGroupStyle() {
        const { style } = this.view || {};
        if (style !== undefined) {
            return style;
        }
        if (this.encoding.x || this.encoding.y) {
            return 'cell';
        }
        else {
            return 'view';
        }
    }
    getMapping() {
        return this.encoding;
    }
    get mark() {
        return this.markDef.type;
    }
    channelHasField(channel) {
        return extension_channelHasField(this.encoding, channel);
    }
    fieldDef(channel) {
        const channelDef = this.encoding[channel];
        return extension_getFieldDef(channelDef);
    }
    typedFieldDef(channel) {
        const fieldDef = this.fieldDef(channel);
        if (extension_isTypedFieldDef(fieldDef)) {
            return fieldDef;
        }
        return null;
    }
}
//# sourceMappingURL=unit.js.map
;// ../../node_modules/vega-lite/build/src/compile/layer.js















class extension_LayerModel extends extension_Model {
    constructor(spec, parent, parentGivenName, parentGivenSize, config) {
        super(spec, 'layer', parent, parentGivenName, config, spec.resolve, spec.view);
        const layoutSize = {
            ...parentGivenSize,
            ...(spec.width ? { width: spec.width } : {}),
            ...(spec.height ? { height: spec.height } : {})
        };
        this.children = spec.layer.map((layer, i) => {
            if (extension_isLayerSpec(layer)) {
                return new extension_LayerModel(layer, this, this.getName(`layer_${i}`), layoutSize, config);
            }
            else if (extension_isUnitSpec(layer)) {
                return new extension_UnitModel(layer, this, this.getName(`layer_${i}`), layoutSize, config);
            }
            throw new Error(extension_invalidSpec(layer));
        });
    }
    parseData() {
        this.component.data = extension_parse_parseData(this);
        for (const child of this.children) {
            child.parseData();
        }
    }
    parseLayoutSize() {
        extension_parseLayerLayoutSize(this);
    }
    parseSelections() {
        // Merge selections up the hierarchy so that they may be referenced
        // across unit specs. Persist their definitions within each child
        // to assemble signals which remain within output Vega unit groups.
        this.component.selection = {};
        for (const child of this.children) {
            child.parseSelections();
            for (const key of extension_util_keys(child.component.selection)) {
                this.component.selection[key] = child.component.selection[key];
            }
        }
        if (Object.values(this.component.selection).some(selCmpt => extension_isTimerSelection(selCmpt))) {
            extension_log_error(extension_MULTI_VIEW_ANIMATION_UNSUPPORTED);
        }
    }
    parseMarkGroup() {
        for (const child of this.children) {
            child.parseMarkGroup();
        }
    }
    parseAxesAndHeaders() {
        extension_parseLayerAxes(this);
    }
    assembleSelectionTopLevelSignals(signals) {
        return this.children.reduce((sg, child) => child.assembleSelectionTopLevelSignals(sg), signals);
    }
    // TODO: Support same named selections across children.
    assembleSignals() {
        return this.children.reduce((signals, child) => {
            return signals.concat(child.assembleSignals());
        }, extension_assembleAxisSignals(this));
    }
    assembleLayoutSignals() {
        return this.children.reduce((signals, child) => {
            return signals.concat(child.assembleLayoutSignals());
        }, extension_assembleLayoutSignals(this));
    }
    assembleSelectionData(data) {
        return this.children.reduce((db, child) => child.assembleSelectionData(db), data);
    }
    assembleGroupStyle() {
        const uniqueStyles = new Set();
        for (const child of this.children) {
            for (const style of extension_vega_util_module_array(child.assembleGroupStyle())) {
                uniqueStyles.add(style);
            }
        }
        const styles = Array.from(uniqueStyles);
        return styles.length > 1 ? styles : styles.length === 1 ? styles[0] : undefined;
    }
    assembleTitle() {
        let title = super.assembleTitle();
        if (title) {
            return title;
        }
        // If title does not provide layer, look into children
        for (const child of this.children) {
            title = child.assembleTitle();
            if (title) {
                return title;
            }
        }
        return undefined;
    }
    assembleLayout() {
        return null;
    }
    assembleMarks() {
        return extension_assembleLayerSelectionMarks(this, this.children.flatMap(child => {
            return child.assembleMarks();
        }));
    }
    assembleLegends() {
        return this.children.reduce((legends, child) => {
            return legends.concat(child.assembleLegends());
        }, extension_assembleLegends(this));
    }
}
//# sourceMappingURL=layer.js.map
;// ../../node_modules/vega-lite/build/src/compile/buildmodel.js






function extension_buildModel(spec, parent, parentGivenName, unitSize, config) {
    if (extension_isFacetSpec(spec)) {
        return new extension_FacetModel(spec, parent, parentGivenName, config);
    }
    else if (extension_isLayerSpec(spec)) {
        return new extension_LayerModel(spec, parent, parentGivenName, unitSize, config);
    }
    else if (extension_isUnitSpec(spec)) {
        return new extension_UnitModel(spec, parent, parentGivenName, unitSize, config);
    }
    else if (extension_isAnyConcatSpec(spec)) {
        return new extension_ConcatModel(spec, parent, parentGivenName, config);
    }
    throw new Error(extension_invalidSpec(spec));
}
//# sourceMappingURL=buildmodel.js.map
;// ../../node_modules/vega-lite/build/src/compile/compile.js












/**
 * Vega-Lite's main function, for compiling Vega-Lite spec into Vega spec.
 *
 * At a high-level, we make the following transformations in different phases:
 *
 * Input spec
 *     |
 *     |  (Normalization)
 *     v
 * Normalized Spec (Row/Column channels in single-view specs becomes faceted specs, composite marks becomes layered specs.)
 *     |
 *     |  (Build Model)
 *     v
 * A model tree of the spec
 *     |
 *     |  (Parse)
 *     v
 * A model tree with parsed components (intermediate structure of visualization primitives in a format that can be easily merged)
 *     |
 *     | (Optimize)
 *     v
 * A model tree with parsed components with the data component optimized
 *     |
 *     | (Assemble)
 *     v
 * Vega spec
 *
 * @param inputSpec The Vega-Lite specification.
 * @param opt       Optional arguments passed to the Vega-Lite compiler.
 * @returns         An object containing the compiled Vega spec and normalized Vega-Lite spec.
 */
function extension_compile_compile(inputSpec, opt = {}) {
    // 0. Augment opt with default opts
    if (opt.logger) {
        // set the singleton logger to the provided logger
        extension_log_set(opt.logger);
    }
    if (opt.fieldTitle) {
        // set the singleton field title formatter
        extension_setTitleFormatter(opt.fieldTitle);
    }
    try {
        // 1. Initialize config by deep merging default config with the config provided via option and the input spec.
        const config = extension_initConfig(extension_mergeConfig(opt.config, inputSpec.config));
        // 2. Normalize: Convert input spec -> normalized spec
        // - Decompose all extended unit specs into composition of unit spec. For example, a box plot get expanded into multiple layers of bars, ticks, and rules. The shorthand row/column channel is also expanded to a facet spec.
        // - Normalize autosize and width or height spec
        const spec = extension_normalize_normalize(inputSpec, config);
        // 3. Build Model: normalized spec -> Model (a tree structure)
        // This phases instantiates the models with default config by doing a top-down traversal. This allows us to pass properties that child models derive from their parents via their constructors.
        // See the abstract `Model` class and its children (UnitModel, LayerModel, FacetModel, ConcatModel) for different types of models.
        const model = extension_buildModel(spec, null, '', undefined, config);
        // 4 Parse: Model --> Model with components
        // Note that components = intermediate representations that are equivalent to Vega specs.
        // We need these intermediate representation because we need to merge many visualization "components" like projections, scales, axes, and legends.
        // We will later convert these components into actual Vega specs in the assemble phase.
        // In this phase, we do a bottom-up traversal over the whole tree to
        // parse for each type of components once (e.g., data, layout, mark, scale).
        // By doing bottom-up traversal, we start parsing components of unit specs and
        // then merge child components of parent composite specs.
        //
        // Please see inside model.parse() for order of different components parsed.
        model.parse();
        // drawDataflow(model.component.data.sources);
        // 5. Optimize the dataflow. This will modify the data component of the model.
        extension_optimizeDataflow(model.component.data, model);
        // drawDataflow(model.component.data.sources);
        // 6. Assemble: convert model components --> Vega Spec.
        const vgSpec = extension_assembleTopLevelModel(model, extension_getTopLevelProperties(inputSpec, spec.autosize, config, model), inputSpec.datasets, inputSpec.usermeta);
        return {
            spec: vgSpec,
            normalized: spec
        };
    }
    finally {
        // Reset the singleton logger if a logger is provided
        if (opt.logger) {
            extension_log_reset();
        }
        // Reset the singleton field title formatter if provided
        if (opt.fieldTitle) {
            extension_resetTitleFormatter();
        }
    }
}
function extension_getTopLevelProperties(inputSpec, autosize, config, model) {
    const width = model.component.layoutSize.get('width');
    const height = model.component.layoutSize.get('height');
    if (autosize === undefined) {
        autosize = { type: 'pad' };
        if (model.hasAxisOrientSignalRef()) {
            autosize.resize = true;
        }
    }
    else if (extension_vega_util_module_isString(autosize)) {
        autosize = { type: autosize };
    }
    if (width && height && extension_isFitType(autosize.type)) {
        if (width === 'step' && height === 'step') {
            extension_log_warn(extension_droppingFit());
            autosize.type = 'pad';
        }
        else if (width === 'step' || height === 'step') {
            // effectively XOR, because else if
            // get step dimension
            const sizeType = width === 'step' ? 'width' : 'height';
            // log that we're dropping fit for respective channel
            extension_log_warn(extension_droppingFit(extension_getPositionScaleChannel(sizeType)));
            // setting type to inverse fit (so if we dropped fit-x, type is now fit-y)
            const inverseSizeType = sizeType === 'width' ? 'height' : 'width';
            autosize.type = extension_getFitType(inverseSizeType);
        }
    }
    return {
        ...(extension_util_keys(autosize).length === 1 && autosize.type
            ? autosize.type === 'pad'
                ? {}
                : { autosize: autosize.type }
            : { autosize }),
        ...extension_extractTopLevelProperties(config, false),
        ...extension_extractTopLevelProperties(inputSpec, true)
    };
}
/*
 * Assemble the top-level model to a Vega spec.
 *
 * Note: this couldn't be `model.assemble()` since the top-level model
 * needs some special treatment to generate top-level properties.
 */
function extension_assembleTopLevelModel(model, topLevelProperties, datasets = {}, usermeta) {
    // Config with Vega-Lite only config removed.
    const vgConfig = model.config ? extension_stripAndRedirectConfig(model.config) : undefined;
    const rootData = extension_assembleRootData(model.component.data, datasets);
    const data = model.assembleSelectionData(rootData);
    const projections = model.assembleProjections();
    const title = model.assembleTitle();
    const style = model.assembleGroupStyle();
    const encodeEntry = model.assembleGroupEncodeEntry(true);
    let layoutSignals = model.assembleLayoutSignals();
    // move width and height signals with values to top level
    layoutSignals = layoutSignals.filter(signal => {
        if ((signal.name === 'width' || signal.name === 'height') && signal.value !== undefined) {
            topLevelProperties[signal.name] = +signal.value;
            return false;
        }
        return true;
    });
    const { params, ...otherTopLevelProps } = topLevelProperties;
    return {
        $schema: 'https://vega.github.io/schema/vega/v5.json',
        ...(model.description ? { description: model.description } : {}),
        ...otherTopLevelProps,
        ...(title ? { title } : {}),
        ...(style ? { style } : {}),
        ...(encodeEntry ? { encode: { update: encodeEntry } } : {}),
        data,
        ...(projections.length > 0 ? { projections } : {}),
        ...model.assembleGroup([
            ...layoutSignals,
            ...model.assembleSelectionTopLevelSignals([]),
            ...extension_assembleParameterSignals(params)
        ]),
        ...(vgConfig ? { config: vgConfig } : {}),
        ...(usermeta ? { usermeta } : {})
    };
}
//# sourceMappingURL=compile.js.map
;// ../../node_modules/vega-lite/build/src/index.js

const extension_build_src_version = extension_build_package_namespaceObject.rE;



//# sourceMappingURL=index.js.map
;// ../../node_modules/vega-schema-url-parser/dist/parser.module.js
function extension_e(e){const[n,r]=/schema\/([\w-]+)\/([\w\.\-]+)\.json$/g.exec(e).slice(1,3);return{library:n,version:r}}/* harmony default export */ const extension_parser_module = (extension_e);
//# sourceMappingURL=parser.module.js.map

;// ../../node_modules/vega-themes/build/vega-themes.module.js
var extension_vega_themes_module_name = "vega-themes";
var extension_version$1 = "2.15.0";
var extension_vega_themes_module_description = "Themes for stylized Vega and Vega-Lite visualizations.";
var extension_vega_themes_module_keywords = ["vega", "vega-lite", "themes", "style"];
var extension_license = "BSD-3-Clause";
var extension_author = {
  name: "UW Interactive Data Lab",
  url: "https://idl.cs.washington.edu"
};
var extension_contributors = [{
  name: "Emily Gu",
  url: "https://github.com/emilygu"
}, {
  name: "Arvind Satyanarayan",
  url: "http://arvindsatya.com"
}, {
  name: "Jeffrey Heer",
  url: "https://idl.cs.washington.edu"
}, {
  name: "Dominik Moritz",
  url: "https://www.domoritz.de"
}];
var extension_vega_themes_module_main = "build/vega-themes.js";
var extension_vega_themes_module_module = "build/vega-themes.module.js";
var extension_unpkg = "build/vega-themes.min.js";
var extension_jsdelivr = "build/vega-themes.min.js";
var extension_vega_themes_module_types = "build/vega-themes.module.d.ts";
var extension_repository = {
  type: "git",
  url: "https://github.com/vega/vega-themes.git"
};
var extension_files = ["src", "build"];
var extension_scripts = {
  prebuild: "yarn clean",
  build: "rollup -c",
  clean: "rimraf build && rimraf examples/build",
  "copy:data": "rsync -r node_modules/vega-datasets/data/* examples/data",
  "copy:build": "rsync -r build/* examples/build",
  "deploy:gh": "yarn build && mkdir -p examples/build && rsync -r build/* examples/build && gh-pages -d examples",
  preversion: "yarn lint",
  serve: "browser-sync start -s -f build examples --serveStatic examples",
  start: "yarn build && concurrently --kill-others -n Server,Rollup 'yarn serve' 'rollup -c -w'",
  format: "eslint . --fix",
  lint: "eslint .",
  release: "release-it"
};
var extension_devDependencies = {
  "@babel/core": "^7.24.6",
  "@babel/plugin-transform-runtime": "^7.24.6",
  "@babel/preset-env": "^7.24.6",
  "@babel/preset-typescript": "^7.24.6",
  "@release-it/conventional-changelog": "^8.0.1",
  "@rollup/plugin-json": "^6.1.0",
  "@rollup/plugin-node-resolve": "^15.2.3",
  "@rollup/plugin-terser": "^0.4.4",
  "@typescript-eslint/eslint-plugin": "^7.11.0",
  "@typescript-eslint/parser": "^7.11.0",
  "browser-sync": "^3.0.2",
  concurrently: "^8.2.2",
  eslint: "^8.45.0",
  "eslint-config-prettier": "^9.1.0",
  "eslint-plugin-prettier": "^5.1.3",
  "gh-pages": "^6.1.1",
  prettier: "^3.2.5",
  "release-it": "^17.3.0",
  rollup: "^4.18.0",
  "rollup-plugin-bundle-size": "^1.0.3",
  "rollup-plugin-ts": "^3.4.5",
  typescript: "^5.4.5",
  vega: "^5.25.0",
  "vega-lite": "^5.9.3"
};
var extension_peerDependencies = {
  vega: "*",
  "vega-lite": "*"
};
var extension_dependencies = {};
var extension_pkg = {
  name: extension_vega_themes_module_name,
  version: extension_version$1,
  description: extension_vega_themes_module_description,
  keywords: extension_vega_themes_module_keywords,
  license: extension_license,
  author: extension_author,
  contributors: extension_contributors,
  main: extension_vega_themes_module_main,
  module: extension_vega_themes_module_module,
  unpkg: extension_unpkg,
  jsdelivr: extension_jsdelivr,
  types: extension_vega_themes_module_types,
  repository: extension_repository,
  files: extension_files,
  scripts: extension_scripts,
  devDependencies: extension_devDependencies,
  peerDependencies: extension_peerDependencies,
  dependencies: extension_dependencies
};

const extension_lightColor = '#fff';
const extension_medColor = '#888';
const extension_darkTheme = {
  background: '#333',
  view: {
    stroke: extension_medColor
  },
  title: {
    color: extension_lightColor,
    subtitleColor: extension_lightColor
  },
  style: {
    'guide-label': {
      fill: extension_lightColor
    },
    'guide-title': {
      fill: extension_lightColor
    }
  },
  axis: {
    domainColor: extension_lightColor,
    gridColor: extension_medColor,
    tickColor: extension_lightColor
  }
};

const extension_markColor$7 = '#4572a7';
const extension_excelTheme = {
  background: '#fff',
  arc: {
    fill: extension_markColor$7
  },
  area: {
    fill: extension_markColor$7
  },
  line: {
    stroke: extension_markColor$7,
    strokeWidth: 2
  },
  path: {
    stroke: extension_markColor$7
  },
  rect: {
    fill: extension_markColor$7
  },
  shape: {
    stroke: extension_markColor$7
  },
  symbol: {
    fill: extension_markColor$7,
    strokeWidth: 1.5,
    size: 50
  },
  axis: {
    bandPosition: 0.5,
    grid: true,
    gridColor: '#000000',
    gridOpacity: 1,
    gridWidth: 0.5,
    labelPadding: 10,
    tickSize: 5,
    tickWidth: 0.5
  },
  axisBand: {
    grid: false,
    tickExtra: true
  },
  legend: {
    labelBaseline: 'middle',
    labelFontSize: 11,
    symbolSize: 50,
    symbolType: 'square'
  },
  range: {
    category: ['#4572a7', '#aa4643', '#8aa453', '#71598e', '#4598ae', '#d98445', '#94aace', '#d09393', '#b9cc98', '#a99cbc']
  }
};

const extension_markColor$6 = '#30a2da';
const extension_axisColor$2 = '#cbcbcb';
const extension_guideLabelColor = '#999';
const extension_guideTitleColor = '#333';
const extension_backgroundColor$2 = '#f0f0f0';
const extension_blackTitle = '#333';
const extension_fiveThirtyEightTheme = {
  arc: {
    fill: extension_markColor$6
  },
  area: {
    fill: extension_markColor$6
  },
  axis: {
    domainColor: extension_axisColor$2,
    grid: true,
    gridColor: extension_axisColor$2,
    gridWidth: 1,
    labelColor: extension_guideLabelColor,
    labelFontSize: 10,
    titleColor: extension_guideTitleColor,
    tickColor: extension_axisColor$2,
    tickSize: 10,
    titleFontSize: 14,
    titlePadding: 10,
    labelPadding: 4
  },
  axisBand: {
    grid: false
  },
  background: extension_backgroundColor$2,
  group: {
    fill: extension_backgroundColor$2
  },
  legend: {
    labelColor: extension_blackTitle,
    labelFontSize: 11,
    padding: 1,
    symbolSize: 30,
    symbolType: 'square',
    titleColor: extension_blackTitle,
    titleFontSize: 14,
    titlePadding: 10
  },
  line: {
    stroke: extension_markColor$6,
    strokeWidth: 2
  },
  path: {
    stroke: extension_markColor$6,
    strokeWidth: 0.5
  },
  rect: {
    fill: extension_markColor$6
  },
  range: {
    category: ['#30a2da', '#fc4f30', '#e5ae38', '#6d904f', '#8b8b8b', '#b96db8', '#ff9e27', '#56cc60', '#52d2ca', '#52689e', '#545454', '#9fe4f8'],
    diverging: ['#cc0020', '#e77866', '#f6e7e1', '#d6e8ed', '#91bfd9', '#1d78b5'],
    heatmap: ['#d6e8ed', '#cee0e5', '#91bfd9', '#549cc6', '#1d78b5']
  },
  point: {
    filled: true,
    shape: 'circle'
  },
  shape: {
    stroke: extension_markColor$6
  },
  bar: {
    binSpacing: 2,
    fill: extension_markColor$6,
    stroke: null
  },
  title: {
    anchor: 'start',
    fontSize: 24,
    fontWeight: 600,
    offset: 20
  }
};

const extension_markColor$5 = '#000';
const extension_ggplot2Theme = {
  group: {
    fill: '#e5e5e5'
  },
  arc: {
    fill: extension_markColor$5
  },
  area: {
    fill: extension_markColor$5
  },
  line: {
    stroke: extension_markColor$5
  },
  path: {
    stroke: extension_markColor$5
  },
  rect: {
    fill: extension_markColor$5
  },
  shape: {
    stroke: extension_markColor$5
  },
  symbol: {
    fill: extension_markColor$5,
    size: 40
  },
  axis: {
    domain: false,
    grid: true,
    gridColor: '#FFFFFF',
    gridOpacity: 1,
    labelColor: '#7F7F7F',
    labelPadding: 4,
    tickColor: '#7F7F7F',
    tickSize: 5.67,
    titleFontSize: 16,
    titleFontWeight: 'normal'
  },
  legend: {
    labelBaseline: 'middle',
    labelFontSize: 11,
    symbolSize: 40
  },
  range: {
    category: ['#000000', '#7F7F7F', '#1A1A1A', '#999999', '#333333', '#B0B0B0', '#4D4D4D', '#C9C9C9', '#666666', '#DCDCDC']
  }
};

const extension_headlineFontSize = 22;
const extension_headlineFontWeight = 'normal';
const extension_labelFont$1 = 'Benton Gothic, sans-serif';
const extension_labelFontSize = 11.5;
const extension_labelFontWeight = 'normal';
const extension_markColor$4 = '#82c6df';
// const markHighlight = '#006d8f';
// const markDemocrat = '#5789b8';
// const markRepublican = '#d94f54';
const extension_titleFont = 'Benton Gothic Bold, sans-serif';
const extension_titleFontWeight = 'normal';
const extension_titleFontSize$1 = 13;
const extension_colorSchemes$1 = {
  'category-6': ['#ec8431', '#829eb1', '#c89d29', '#3580b1', '#adc839', '#ab7fb4'],
  'fire-7': ['#fbf2c7', '#f9e39c', '#f8d36e', '#f4bb6a', '#e68a4f', '#d15a40', '#ab4232'],
  'fireandice-6': ['#e68a4f', '#f4bb6a', '#f9e39c', '#dadfe2', '#a6b7c6', '#849eae'],
  'ice-7': ['#edefee', '#dadfe2', '#c4ccd2', '#a6b7c6', '#849eae', '#607785', '#47525d']
};
const extension_latimesTheme = {
  background: '#ffffff',
  title: {
    anchor: 'start',
    color: '#000000',
    font: extension_titleFont,
    fontSize: extension_headlineFontSize,
    fontWeight: extension_headlineFontWeight
  },
  arc: {
    fill: extension_markColor$4
  },
  area: {
    fill: extension_markColor$4
  },
  line: {
    stroke: extension_markColor$4,
    strokeWidth: 2
  },
  path: {
    stroke: extension_markColor$4
  },
  rect: {
    fill: extension_markColor$4
  },
  shape: {
    stroke: extension_markColor$4
  },
  symbol: {
    fill: extension_markColor$4,
    size: 30
  },
  axis: {
    labelFont: extension_labelFont$1,
    labelFontSize: extension_labelFontSize,
    labelFontWeight: extension_labelFontWeight,
    titleFont: extension_titleFont,
    titleFontSize: extension_titleFontSize$1,
    titleFontWeight: extension_titleFontWeight
  },
  axisX: {
    labelAngle: 0,
    labelPadding: 4,
    tickSize: 3
  },
  axisY: {
    labelBaseline: 'middle',
    maxExtent: 45,
    minExtent: 45,
    tickSize: 2,
    titleAlign: 'left',
    titleAngle: 0,
    titleX: -45,
    titleY: -11
  },
  legend: {
    labelFont: extension_labelFont$1,
    labelFontSize: extension_labelFontSize,
    symbolType: 'square',
    titleFont: extension_titleFont,
    titleFontSize: extension_titleFontSize$1,
    titleFontWeight: extension_titleFontWeight
  },
  range: {
    category: extension_colorSchemes$1['category-6'],
    diverging: extension_colorSchemes$1['fireandice-6'],
    heatmap: extension_colorSchemes$1['fire-7'],
    ordinal: extension_colorSchemes$1['fire-7'],
    ramp: extension_colorSchemes$1['fire-7']
  }
};

const extension_markColor$3 = '#ab5787';
const extension_axisColor$1 = '#979797';
const extension_quartzTheme = {
  background: '#f9f9f9',
  arc: {
    fill: extension_markColor$3
  },
  area: {
    fill: extension_markColor$3
  },
  line: {
    stroke: extension_markColor$3
  },
  path: {
    stroke: extension_markColor$3
  },
  rect: {
    fill: extension_markColor$3
  },
  shape: {
    stroke: extension_markColor$3
  },
  symbol: {
    fill: extension_markColor$3,
    size: 30
  },
  axis: {
    domainColor: extension_axisColor$1,
    domainWidth: 0.5,
    gridWidth: 0.2,
    labelColor: extension_axisColor$1,
    tickColor: extension_axisColor$1,
    tickWidth: 0.2,
    titleColor: extension_axisColor$1
  },
  axisBand: {
    grid: false
  },
  axisX: {
    grid: true,
    tickSize: 10
  },
  axisY: {
    domain: false,
    grid: true,
    tickSize: 0
  },
  legend: {
    labelFontSize: 11,
    padding: 1,
    symbolSize: 30,
    symbolType: 'square'
  },
  range: {
    category: ['#ab5787', '#51b2e5', '#703c5c', '#168dd9', '#d190b6', '#00609f', '#d365ba', '#154866', '#666666', '#c4c4c4']
  }
};

const extension_markColor$2 = '#3e5c69';
const extension_voxTheme = {
  background: '#fff',
  arc: {
    fill: extension_markColor$2
  },
  area: {
    fill: extension_markColor$2
  },
  line: {
    stroke: extension_markColor$2
  },
  path: {
    stroke: extension_markColor$2
  },
  rect: {
    fill: extension_markColor$2
  },
  shape: {
    stroke: extension_markColor$2
  },
  symbol: {
    fill: extension_markColor$2
  },
  axis: {
    domainWidth: 0.5,
    grid: true,
    labelPadding: 2,
    tickSize: 5,
    tickWidth: 0.5,
    titleFontWeight: 'normal'
  },
  axisBand: {
    grid: false
  },
  axisX: {
    gridWidth: 0.2
  },
  axisY: {
    gridDash: [3],
    gridWidth: 0.4
  },
  legend: {
    labelFontSize: 11,
    padding: 1,
    symbolType: 'square'
  },
  range: {
    category: ['#3e5c69', '#6793a6', '#182429', '#0570b0', '#3690c0', '#74a9cf', '#a6bddb', '#e2ddf2']
  }
};

const extension_markColor$1 = '#1696d2';
const extension_axisColor = '#000000';
const extension_backgroundColor$1 = '#FFFFFF';
const extension_vega_themes_module_font = 'Lato';
const extension_labelFont = 'Lato';
const extension_sourceFont = 'Lato';
const extension_gridColor$1 = '#DEDDDD';
const extension_titleFontSize = 18;
const extension_colorSchemes = {
  'main-colors': ['#1696d2', '#d2d2d2', '#000000', '#fdbf11', '#ec008b', '#55b748', '#5c5859', '#db2b27'],
  'shades-blue': ['#CFE8F3', '#A2D4EC', '#73BFE2', '#46ABDB', '#1696D2', '#12719E', '#0A4C6A', '#062635'],
  'shades-gray': ['#F5F5F5', '#ECECEC', '#E3E3E3', '#DCDBDB', '#D2D2D2', '#9D9D9D', '#696969', '#353535'],
  'shades-yellow': ['#FFF2CF', '#FCE39E', '#FDD870', '#FCCB41', '#FDBF11', '#E88E2D', '#CA5800', '#843215'],
  'shades-magenta': ['#F5CBDF', '#EB99C2', '#E46AA7', '#E54096', '#EC008B', '#AF1F6B', '#761548', '#351123'],
  'shades-green': ['#DCEDD9', '#BCDEB4', '#98CF90', '#78C26D', '#55B748', '#408941', '#2C5C2D', '#1A2E19'],
  'shades-black': ['#D5D5D4', '#ADABAC', '#848081', '#5C5859', '#332D2F', '#262223', '#1A1717', '#0E0C0D'],
  'shades-red': ['#F8D5D4', '#F1AAA9', '#E9807D', '#E25552', '#DB2B27', '#A4201D', '#6E1614', '#370B0A'],
  'one-group': ['#1696d2', '#000000'],
  'two-groups-cat-1': ['#1696d2', '#000000'],
  'two-groups-cat-2': ['#1696d2', '#fdbf11'],
  'two-groups-cat-3': ['#1696d2', '#db2b27'],
  'two-groups-seq': ['#a2d4ec', '#1696d2'],
  'three-groups-cat': ['#1696d2', '#fdbf11', '#000000'],
  'three-groups-seq': ['#a2d4ec', '#1696d2', '#0a4c6a'],
  'four-groups-cat-1': ['#000000', '#d2d2d2', '#fdbf11', '#1696d2'],
  'four-groups-cat-2': ['#1696d2', '#ec0008b', '#fdbf11', '#5c5859'],
  'four-groups-seq': ['#cfe8f3', '#73bf42', '#1696d2', '#0a4c6a'],
  'five-groups-cat-1': ['#1696d2', '#fdbf11', '#d2d2d2', '#ec008b', '#000000'],
  'five-groups-cat-2': ['#1696d2', '#0a4c6a', '#d2d2d2', '#fdbf11', '#332d2f'],
  'five-groups-seq': ['#cfe8f3', '#73bf42', '#1696d2', '#0a4c6a', '#000000'],
  'six-groups-cat-1': ['#1696d2', '#ec008b', '#fdbf11', '#000000', '#d2d2d2', '#55b748'],
  'six-groups-cat-2': ['#1696d2', '#d2d2d2', '#ec008b', '#fdbf11', '#332d2f', '#0a4c6a'],
  'six-groups-seq': ['#cfe8f3', '#a2d4ec', '#73bfe2', '#46abdb', '#1696d2', '#12719e'],
  'diverging-colors': ['#ca5800', '#fdbf11', '#fdd870', '#fff2cf', '#cfe8f3', '#73bfe2', '#1696d2', '#0a4c6a']
};
const extension_urbanInstituteTheme = {
  background: extension_backgroundColor$1,
  title: {
    anchor: 'start',
    fontSize: extension_titleFontSize,
    font: extension_vega_themes_module_font
  },
  axisX: {
    domain: true,
    domainColor: extension_axisColor,
    domainWidth: 1,
    grid: false,
    labelFontSize: 12,
    labelFont: extension_labelFont,
    labelAngle: 0,
    tickColor: extension_axisColor,
    tickSize: 5,
    titleFontSize: 12,
    titlePadding: 10,
    titleFont: extension_vega_themes_module_font
  },
  axisY: {
    domain: false,
    domainWidth: 1,
    grid: true,
    gridColor: extension_gridColor$1,
    gridWidth: 1,
    labelFontSize: 12,
    labelFont: extension_labelFont,
    labelPadding: 8,
    ticks: false,
    titleFontSize: 12,
    titlePadding: 10,
    titleFont: extension_vega_themes_module_font,
    titleAngle: 0,
    titleY: -10,
    titleX: 18
  },
  legend: {
    labelFontSize: 12,
    labelFont: extension_labelFont,
    symbolSize: 100,
    titleFontSize: 12,
    titlePadding: 10,
    titleFont: extension_vega_themes_module_font,
    orient: 'right',
    offset: 10
  },
  view: {
    stroke: 'transparent'
  },
  range: {
    category: extension_colorSchemes['six-groups-cat-1'],
    diverging: extension_colorSchemes['diverging-colors'],
    heatmap: extension_colorSchemes['diverging-colors'],
    ordinal: extension_colorSchemes['six-groups-seq'],
    ramp: extension_colorSchemes['shades-blue']
  },
  area: {
    fill: extension_markColor$1
  },
  rect: {
    fill: extension_markColor$1
  },
  line: {
    color: extension_markColor$1,
    stroke: extension_markColor$1,
    strokeWidth: 5
  },
  trail: {
    color: extension_markColor$1,
    stroke: extension_markColor$1,
    strokeWidth: 0,
    size: 1
  },
  path: {
    stroke: extension_markColor$1,
    strokeWidth: 0.5
  },
  point: {
    filled: true
  },
  text: {
    font: extension_sourceFont,
    color: extension_markColor$1,
    fontSize: 11,
    align: 'center',
    fontWeight: 400,
    size: 11
  },
  style: {
    bar: {
      fill: extension_markColor$1,
      stroke: null
    }
  },
  arc: {
    fill: extension_markColor$1
  },
  shape: {
    stroke: extension_markColor$1
  },
  symbol: {
    fill: extension_markColor$1,
    size: 30
  }
};

/**
 * Copyright 2020 Google LLC.
 *
 * Use of this source code is governed by a BSD-style
 * license that can be found in the LICENSE file or at
 * https://developers.google.com/open-source/licenses/bsd
 */

const extension_markColor = '#3366CC';
const extension_gridColor = '#ccc';
const extension_defaultFont$1 = 'Arial, sans-serif';
const extension_googlechartsTheme = {
  arc: {
    fill: extension_markColor
  },
  area: {
    fill: extension_markColor
  },
  path: {
    stroke: extension_markColor
  },
  rect: {
    fill: extension_markColor
  },
  shape: {
    stroke: extension_markColor
  },
  symbol: {
    stroke: extension_markColor
  },
  circle: {
    fill: extension_markColor
  },
  background: '#fff',
  padding: {
    top: 10,
    right: 10,
    bottom: 10,
    left: 10
  },
  style: {
    'guide-label': {
      font: extension_defaultFont$1,
      fontSize: 12
    },
    'guide-title': {
      font: extension_defaultFont$1,
      fontSize: 12
    },
    'group-title': {
      font: extension_defaultFont$1,
      fontSize: 12
    }
  },
  title: {
    font: extension_defaultFont$1,
    fontSize: 14,
    fontWeight: 'bold',
    dy: -3,
    anchor: 'start'
  },
  axis: {
    gridColor: extension_gridColor,
    tickColor: extension_gridColor,
    domain: false,
    grid: true
  },
  range: {
    category: ['#4285F4', '#DB4437', '#F4B400', '#0F9D58', '#AB47BC', '#00ACC1', '#FF7043', '#9E9D24', '#5C6BC0', '#F06292', '#00796B', '#C2185B'],
    heatmap: ['#c6dafc', '#5e97f6', '#2a56c6']
  }
};

const extension_ptToPx = value => value * (1 / 3 + 1);
const extension_fontSmallPx = extension_ptToPx(9);
const extension_legendFontPx = extension_ptToPx(10);
const extension_fontLargePx = extension_ptToPx(12);
const extension_fontStandard = 'Segoe UI';
const extension_fontTitle = 'wf_standard-font, helvetica, arial, sans-serif';
const extension_firstLevelElementColor = '#252423';
const extension_secondLevelElementColor = '#605E5C';
const extension_backgroundColor = 'transparent';
const extension_backgroundSecondaryColor = '#C8C6C4';
const extension_paletteColor1 = '#118DFF';
const extension_paletteColor2 = '#12239E';
const extension_paletteColor3 = '#E66C37';
const extension_paletteColor4 = '#6B007B';
const extension_paletteColor5 = '#E044A7';
const extension_paletteColor6 = '#744EC2';
const extension_paletteColor7 = '#D9B300';
const extension_paletteColor8 = '#D64550';
const extension_divergentColorMax = extension_paletteColor1;
const extension_divergentColorMin = '#DEEFFF';
const extension_divergentPalette = [extension_divergentColorMin, extension_divergentColorMax];
const extension_ordinalPalette = [extension_divergentColorMin, '#c7e4ff', '#b0d9ff', '#9aceff', '#83c3ff', '#6cb9ff', '#55aeff', '#3fa3ff', '#2898ff', extension_divergentColorMax];
const extension_powerbiTheme = {
  view: {
    stroke: extension_backgroundColor
  },
  background: extension_backgroundColor,
  font: extension_fontStandard,
  header: {
    titleFont: extension_fontTitle,
    titleFontSize: extension_fontLargePx,
    titleColor: extension_firstLevelElementColor,
    labelFont: extension_fontStandard,
    labelFontSize: extension_legendFontPx,
    labelColor: extension_secondLevelElementColor
  },
  axis: {
    ticks: false,
    grid: false,
    domain: false,
    labelColor: extension_secondLevelElementColor,
    labelFontSize: extension_fontSmallPx,
    titleFont: extension_fontTitle,
    titleColor: extension_firstLevelElementColor,
    titleFontSize: extension_fontLargePx,
    titleFontWeight: 'normal'
  },
  axisQuantitative: {
    tickCount: 3,
    grid: true,
    gridColor: extension_backgroundSecondaryColor,
    gridDash: [1, 5],
    labelFlush: false
  },
  axisBand: {
    tickExtra: true
  },
  axisX: {
    labelPadding: 5
  },
  axisY: {
    labelPadding: 10
  },
  bar: {
    fill: extension_paletteColor1
  },
  line: {
    stroke: extension_paletteColor1,
    strokeWidth: 3,
    strokeCap: 'round',
    strokeJoin: 'round'
  },
  text: {
    font: extension_fontStandard,
    fontSize: extension_fontSmallPx,
    fill: extension_secondLevelElementColor
  },
  arc: {
    fill: extension_paletteColor1
  },
  area: {
    fill: extension_paletteColor1,
    line: true,
    opacity: 0.6
  },
  path: {
    stroke: extension_paletteColor1
  },
  rect: {
    fill: extension_paletteColor1
  },
  point: {
    fill: extension_paletteColor1,
    filled: true,
    size: 75
  },
  shape: {
    stroke: extension_paletteColor1
  },
  symbol: {
    fill: extension_paletteColor1,
    strokeWidth: 1.5,
    size: 50
  },
  legend: {
    titleFont: extension_fontStandard,
    titleFontWeight: 'bold',
    titleColor: extension_secondLevelElementColor,
    labelFont: extension_fontStandard,
    labelFontSize: extension_legendFontPx,
    labelColor: extension_secondLevelElementColor,
    symbolType: 'circle',
    symbolSize: 75
  },
  range: {
    category: [extension_paletteColor1, extension_paletteColor2, extension_paletteColor3, extension_paletteColor4, extension_paletteColor5, extension_paletteColor6, extension_paletteColor7, extension_paletteColor8],
    diverging: extension_divergentPalette,
    heatmap: extension_divergentPalette,
    ordinal: extension_ordinalPalette
  }
};

const extension_defaultFont = 'IBM Plex Sans,system-ui,-apple-system,BlinkMacSystemFont,".sfnstext-regular",sans-serif';
const extension_condensedFont = 'IBM Plex Sans Condensed, system-ui, -apple-system, BlinkMacSystemFont, ".SFNSText-Regular", sans-serif';
const extension_fontWeight = 400;
const extension_TOKENS = {
  textPrimary: {
    g90: '#f4f4f4',
    g100: '#f4f4f4',
    white: '#161616',
    g10: '#161616'
  },
  textSecondary: {
    g90: '#c6c6c6',
    g100: '#c6c6c6',
    white: '#525252',
    g10: '#525252'
  },
  // layer
  layerAccent01: {
    white: '#e0e0e0',
    g10: '#e0e0e0',
    g90: '#525252',
    g100: '#393939'
  },
  // grid
  gridBg: {
    white: '#ffffff',
    g10: '#ffffff',
    g90: '#161616',
    g100: '#161616'
  }
};
const extension_darkCategories = ['#8a3ffc', '#33b1ff', '#007d79', '#ff7eb6', '#fa4d56', '#fff1f1', '#6fdc8c', '#4589ff', '#d12771', '#d2a106', '#08bdba', '#bae6ff', '#ba4e00', '#d4bbff'];
const extension_lightCategories = ['#6929c4', '#1192e8', '#005d5d', '#9f1853', '#fa4d56', '#570408', '#198038', '#002d9c', '#ee538b', '#b28600', '#009d9a', '#012749', '#8a3800', '#a56eff'];
function extension_genCarbonConfig({
  theme,
  background
}) {
  const type = ['white', 'g10'].includes(theme) ? 'light' : 'dark';
  const viewbg = extension_TOKENS.gridBg[theme];
  const titleColor = extension_TOKENS.textPrimary[theme];
  const textColor = extension_TOKENS.textSecondary[theme];
  const category = type === 'dark' ? extension_darkCategories : extension_lightCategories;
  const markColor = type === 'dark' ? '#d4bbff' : '#6929c4';
  return {
    background,
    arc: {
      fill: markColor
    },
    area: {
      fill: markColor
    },
    path: {
      stroke: markColor
    },
    rect: {
      fill: markColor
    },
    shape: {
      stroke: markColor
    },
    symbol: {
      stroke: markColor
    },
    circle: {
      fill: markColor
    },
    view: {
      fill: viewbg,
      stroke: viewbg
    },
    group: {
      fill: viewbg
    },
    title: {
      color: titleColor,
      anchor: 'start',
      dy: -15,
      fontSize: 16,
      font: extension_defaultFont,
      fontWeight: 600
    },
    axis: {
      // Axis labels
      labelColor: textColor,
      labelFontSize: 12,
      labelFont: extension_condensedFont,
      labelFontWeight: extension_fontWeight,
      // Axis titles
      titleColor: titleColor,
      titleFontWeight: 600,
      titleFontSize: 12,
      // MISC
      grid: true,
      gridColor: extension_TOKENS.layerAccent01[theme],
      labelAngle: 0
    },
    axisX: {
      titlePadding: 10
    },
    axisY: {
      titlePadding: 2.5
    },
    style: {
      'guide-label': {
        font: extension_defaultFont,
        fill: textColor,
        fontWeight: extension_fontWeight
      },
      'guide-title': {
        font: extension_defaultFont,
        fill: textColor,
        fontWeight: extension_fontWeight
      }
    },
    range: {
      category,
      diverging: ['#750e13', '#a2191f', '#da1e28', '#fa4d56', '#ff8389', '#ffb3b8', '#ffd7d9', '#fff1f1', '#e5f6ff', '#bae6ff', '#82cfff', '#33b1ff', '#1192e8', '#0072c3', '#00539a', '#003a6d'],
      heatmap: ['#f6f2ff', '#e8daff', '#d4bbff', '#be95ff', '#a56eff', '#8a3ffc', '#6929c4', '#491d8b', '#31135e', '#1c0f30']
    }
  };
}

const extension_carbonwhite = extension_genCarbonConfig({
  theme: 'white',
  background: '#ffffff'
});

const extension_carbong10 = extension_genCarbonConfig({
  theme: 'g10',
  background: '#f4f4f4'
});

const extension_carbong90 = extension_genCarbonConfig({
  theme: 'g90',
  background: '#262626'
});

const extension_carbong100 = extension_genCarbonConfig({
  theme: 'g100',
  background: '#161616'
});

const extension_vega_themes_module_version = extension_pkg.version;



;// ../../node_modules/vega-tooltip/build/vega-tooltip.module.js


var extension_vega_tooltip_module_name = "vega-tooltip";
var extension_vega_tooltip_module_version$1 = "0.35.2";
var extension_vega_tooltip_module_description = "A tooltip plugin for Vega-Lite and Vega visualizations.";
var extension_vega_tooltip_module_keywords = [
	"vega-lite",
	"vega",
	"tooltip"
];
var extension_vega_tooltip_module_repository = {
	type: "git",
	url: "https://github.com/vega/vega-tooltip.git"
};
var extension_vega_tooltip_module_author = {
	name: "UW Interactive Data Lab",
	url: "https://idl.cs.washington.edu"
};
var extension_collaborators = [
	"Dominik Moritz",
	"Sira Horradarn",
	"Zening Qu",
	"Kanit Wongsuphasawat",
	"Yuri Astrakhan",
	"Jeffrey Heer"
];
var extension_vega_tooltip_module_license = "BSD-3-Clause";
var extension_bugs = {
	url: "https://github.com/vega/vega-tooltip/issues"
};
var extension_homepage = "https://github.com/vega/vega-tooltip#readme";
var extension_vega_tooltip_module_main = "build/vega-tooltip.js";
var extension_vega_tooltip_module_module = "build/vega-tooltip.module.js";
var extension_vega_tooltip_module_unpkg = "build/vega-tooltip.min.js";
var extension_vega_tooltip_module_jsdelivr = "build/vega-tooltip.min.js";
var extension_vega_tooltip_module_types = "build/src/index.d.ts";
var extension_vega_tooltip_module_files = [
	"src",
	"build",
	"types"
];
var extension_vega_tooltip_module_scripts = {
	prebuild: "npm run clean && npm run build:style",
	build: "rollup -c",
	"build:style": "./build-style.sh",
	clean: "rimraf build && rimraf src/style.ts",
	"copy:data": "cp -R node_modules/vega-datasets/data examples",
	"copy:build": "cp -R build examples",
	"deploy:gh": "npm run build && npm run copy:build && gh-pages -d examples && npm run clean",
	prepublishOnly: "npm run clean && npm run build",
	preversion: "npm run lint && npm run test",
	serve: "browser-sync start -s -f build examples --serveStatic examples",
	start: "npm run build && concurrently --kill-others -n Server,Rollup 'npm run serve' 'rollup -c -w'",
	pretest: "npm run build:style",
	test: "jest",
	"test:inspect": "node --inspect-brk ./node_modules/.bin/jest --runInBand",
	prepare: "npm run copy:data",
	prettierbase: "prettier '*.{css,scss,html}'",
	format: "eslint . --fix && npm run prettierbase -- --write",
	lint: "eslint . && npm run prettierbase -- --check",
	release: "release-it"
};
var extension_vega_tooltip_module_devDependencies = {
	"@babel/core": "^7.26.0",
	"@babel/plugin-proposal-async-generator-functions": "^7.20.7",
	"@babel/plugin-proposal-json-strings": "^7.18.6",
	"@babel/plugin-proposal-object-rest-spread": "^7.20.7",
	"@babel/plugin-proposal-optional-catch-binding": "^7.18.6",
	"@babel/plugin-syntax-dynamic-import": "^7.8.3",
	"@babel/plugin-transform-runtime": "^7.25.9",
	"@babel/preset-env": "^7.26.0",
	"@babel/preset-typescript": "^7.26.0",
	"@release-it/conventional-changelog": "^9.0.2",
	"@rollup/plugin-json": "^6.1.0",
	"@rollup/plugin-node-resolve": "^15.3.0",
	"@rollup/plugin-terser": "^0.4.4",
	"@rollup/plugin-typescript": "^12.1.1",
	"@types/jest": "^29.5.14",
	"@typescript-eslint/eslint-plugin": "^8.13.0",
	"@typescript-eslint/parser": "^8.13.0",
	"browser-sync": "^3.0.3",
	concurrently: "^9.1.0",
	eslint: "^8.46.0",
	"eslint-config-prettier": "^9.1.0",
	"eslint-plugin-jest": "^28.8.3",
	"eslint-plugin-prettier": "^5.2.1",
	"gh-pages": "^6.2.0",
	jest: "^29.7.0",
	"jest-environment-jsdom": "^29.7.0",
	path: "^0.12.7",
	prettier: "^3.3.3",
	"release-it": "^17.10.0",
	rollup: "^4.24.4",
	"rollup-plugin-bundle-size": "^1.0.3",
	sass: "^1.80.6",
	typescript: "~5.6.3",
	"vega-datasets": "^2.9.0",
	"vega-typings": "^1.3.1"
};
var extension_vega_tooltip_module_dependencies = {
	"vega-util": "^1.17.2"
};
var extension_optionalDependencies = {
	"@rollup/rollup-linux-x64-gnu": "^4.24.4"
};
var extension_vega_tooltip_module_pkg = {
	name: extension_vega_tooltip_module_name,
	version: extension_vega_tooltip_module_version$1,
	description: extension_vega_tooltip_module_description,
	keywords: extension_vega_tooltip_module_keywords,
	repository: extension_vega_tooltip_module_repository,
	author: extension_vega_tooltip_module_author,
	collaborators: extension_collaborators,
	license: extension_vega_tooltip_module_license,
	bugs: extension_bugs,
	homepage: extension_homepage,
	main: extension_vega_tooltip_module_main,
	module: extension_vega_tooltip_module_module,
	unpkg: extension_vega_tooltip_module_unpkg,
	jsdelivr: extension_vega_tooltip_module_jsdelivr,
	types: extension_vega_tooltip_module_types,
	files: extension_vega_tooltip_module_files,
	scripts: extension_vega_tooltip_module_scripts,
	devDependencies: extension_vega_tooltip_module_devDependencies,
	dependencies: extension_vega_tooltip_module_dependencies,
	optionalDependencies: extension_optionalDependencies
};

/**
 * Format the value to be shown in the tooltip.
 *
 * @param value The value to show in the tooltip.
 * @param valueToHtml Function to convert a single cell value to an HTML string
 */
function extension_vega_tooltip_module_formatValue(value, valueToHtml, maxDepth, baseURL) {
    if (extension_vega_util_module_isArray(value)) {
        return `[${value.map((v) => valueToHtml(extension_vega_util_module_isString(v) ? v : extension_vega_tooltip_module_stringify(v, maxDepth))).join(', ')}]`;
    }
    if (extension_vega_util_module_isObject(value)) {
        let content = '';
        const { title, image, ...rest } = value;
        if (title) {
            content += `<h2>${valueToHtml(title)}</h2>`;
        }
        if (image) {
            content += `<img src="${new URL(valueToHtml(image), baseURL || location.href).href}">`;
        }
        const keys = Object.keys(rest);
        if (keys.length > 0) {
            content += '<table>';
            for (const key of keys) {
                let val = rest[key];
                // ignore undefined properties
                if (val === undefined) {
                    continue;
                }
                if (extension_vega_util_module_isObject(val)) {
                    val = extension_vega_tooltip_module_stringify(val, maxDepth);
                }
                content += `<tr><td class="key">${valueToHtml(key)}</td><td class="value">${valueToHtml(val)}</td></tr>`;
            }
            content += `</table>`;
        }
        return content || '{}'; // show empty object if there are no properties
    }
    return valueToHtml(value);
}
function extension_replacer(maxDepth) {
    const stack = [];
    return function (key, value) {
        if (typeof value !== 'object' || value === null) {
            return value;
        }
        const pos = stack.indexOf(this) + 1;
        stack.length = pos;
        if (stack.length > maxDepth) {
            return '[Object]';
        }
        if (stack.indexOf(value) >= 0) {
            return '[Circular]';
        }
        stack.push(value);
        return value;
    };
}
/**
 * Stringify any JS object to valid JSON
 */
function extension_vega_tooltip_module_stringify(obj, maxDepth) {
    return JSON.stringify(obj, extension_replacer(maxDepth));
}

// generated with build-style.sh
var extension_defaultStyle = `#vg-tooltip-element {
  visibility: hidden;
  padding: 8px;
  position: fixed;
  z-index: 1000;
  font-family: sans-serif;
  font-size: 11px;
  border-radius: 3px;
  box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
  /* The default theme is the light theme. */
  background-color: rgba(255, 255, 255, 0.95);
  border: 1px solid #d9d9d9;
  color: black;
}
#vg-tooltip-element.visible {
  visibility: visible;
}
#vg-tooltip-element h2 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 13px;
}
#vg-tooltip-element table {
  border-spacing: 0;
}
#vg-tooltip-element table tr {
  border: none;
}
#vg-tooltip-element table tr td {
  overflow: hidden;
  text-overflow: ellipsis;
  padding-top: 2px;
  padding-bottom: 2px;
}
#vg-tooltip-element table tr td.key {
  color: #808080;
  max-width: 150px;
  text-align: right;
  padding-right: 4px;
}
#vg-tooltip-element table tr td.value {
  display: block;
  max-width: 300px;
  max-height: 7em;
  text-align: left;
}
#vg-tooltip-element.dark-theme {
  background-color: rgba(32, 32, 32, 0.9);
  border: 1px solid #f5f5f5;
  color: white;
}
#vg-tooltip-element.dark-theme td.key {
  color: #bfbfbf;
}
`;

const extension_EL_ID = 'vg-tooltip-element';
const extension_DEFAULT_OPTIONS = {
    offsetX: 10,
    offsetY: 10,
    id: extension_EL_ID,
    styleId: 'vega-tooltip-style',
    theme: 'light',
    disableDefaultStyle: false,
    sanitize: extension_escapeHTML,
    maxDepth: 2,
    formatTooltip: extension_vega_tooltip_module_formatValue,
    baseURL: '',
    anchor: 'cursor',
    position: ['top', 'bottom', 'left', 'right', 'top-left', 'top-right', 'bottom-left', 'bottom-right'],
};
/**
 * Escape special HTML characters.
 *
 * @param value A value to convert to string and HTML-escape.
 */
function extension_escapeHTML(value) {
    return String(value).replace(/&/g, '&amp;').replace(/</g, '&lt;');
}
function extension_createDefaultStyle(id) {
    // Just in case this id comes from a user, ensure these is no security issues
    if (!/^[A-Za-z]+[-:.\w]*$/.test(id)) {
        throw new Error('Invalid HTML ID');
    }
    return extension_defaultStyle.toString().replace(extension_EL_ID, id);
}

/**
 * Position the tooltip
 *
 * @param event The mouse event.
 * @param tooltipBox
 * @param options Tooltip handler options.
 */
function extension_calculatePositionRelativeToCursor(event, tooltipBox, { offsetX, offsetY }) {
    // the possible positions for the tooltip
    const positions = extension_getPositions({ x1: event.clientX, x2: event.clientX, y1: event.clientY, y2: event.clientY }, tooltipBox, offsetX, offsetY);
    // order of positions to try
    const postionArr = ['bottom-right', 'bottom-left', 'top-right', 'top-left'];
    // test positions till a valid one is found
    for (const p of postionArr) {
        if (extension_tooltipIsInViewport(positions[p], tooltipBox)) {
            return positions[p];
        }
    }
    // default to top-left if a valid position is not found
    // this is legacy behavior
    return positions['top-left'];
}
/**
 * Calculates the position of the tooltip relative to the mark.
 * @param handler The handler instance.
 * @param event The mouse event.
 * @param item The item that the tooltip is being shown for.
 * @param tooltipBox Client rect of the tooltip element.
 * @param options Tooltip handler options.
 * @returns
 */
function extension_calculatePositionRelativeToMark(handler, event, item, tooltipBox, options) {
    const { position, offsetX, offsetY } = options;
    const containerBox = handler._el.getBoundingClientRect();
    const origin = handler._origin;
    // bounds of the mark relative to the viewport
    const markBounds = extension_getMarkBounds(containerBox, origin, item);
    // the possible positions for the tooltip
    const positions = extension_getPositions(markBounds, tooltipBox, offsetX, offsetY);
    // positions to test
    const positionArr = Array.isArray(position) ? position : [position];
    // test positions till a valid one is found
    for (const p of positionArr) {
        // verify that the tooltip is in the view and the mouse is not where the tooltip would be
        if (extension_tooltipIsInViewport(positions[p], tooltipBox) && !extension_mouseIsOnTooltip(event, positions[p], tooltipBox)) {
            return positions[p];
        }
    }
    // default to cursor position if a valid position is not found
    return extension_calculatePositionRelativeToCursor(event, tooltipBox, options);
}
// Calculates the bounds of the mark relative to the viewport.
function extension_getMarkBounds(containerBox, origin, item) {
    // if this is a voronoi mark, we want to use the bounds of the point that voronoi cell represents
    const markBounds = item.isVoronoi ? item.datum.bounds : item.bounds;
    let left = containerBox.left + origin[0] + markBounds.x1;
    let top = containerBox.top + origin[1] + markBounds.y1;
    // traverse mark groups, summing their offsets to get the total offset
    // item bounds are relative to their group so if there are multiple nested groups we need to add them all
    let parentItem = item;
    while (parentItem.mark.group) {
        parentItem = parentItem.mark.group;
        left += parentItem.x ?? 0;
        top += parentItem.y ?? 0;
    }
    const markWidth = markBounds.x2 - markBounds.x1;
    const markHeight = markBounds.y2 - markBounds.y1;
    return {
        x1: left,
        x2: left + markWidth,
        y1: top,
        y2: top + markHeight,
    };
}
// Calculates the tooltip xy for each possible position.
function extension_getPositions(markBounds, tooltipBox, offsetX, offsetY) {
    const xc = (markBounds.x1 + markBounds.x2) / 2;
    const yc = (markBounds.y1 + markBounds.y2) / 2;
    // x positions
    const left = markBounds.x1 - tooltipBox.width - offsetX;
    const center = xc - tooltipBox.width / 2;
    const right = markBounds.x2 + offsetX;
    // y positions
    const top = markBounds.y1 - tooltipBox.height - offsetY;
    const middle = yc - tooltipBox.height / 2;
    const bottom = markBounds.y2 + offsetY;
    const positions = {
        top: { x: center, y: top },
        bottom: { x: center, y: bottom },
        left: { x: left, y: middle },
        right: { x: right, y: middle },
        'top-left': { x: left, y: top },
        'top-right': { x: right, y: top },
        'bottom-left': { x: left, y: bottom },
        'bottom-right': { x: right, y: bottom },
    };
    return positions;
}
// Checks if the tooltip would be in the viewport at the given position
function extension_tooltipIsInViewport(position, tooltipBox) {
    return (position.x >= 0 &&
        position.y >= 0 &&
        position.x + tooltipBox.width <= window.innerWidth &&
        position.y + tooltipBox.height <= window.innerHeight);
}
// Checks if the mouse is within the tooltip area
function extension_mouseIsOnTooltip(event, position, tooltipBox) {
    return (event.clientX >= position.x &&
        event.clientX <= position.x + tooltipBox.width &&
        event.clientY >= position.y &&
        event.clientY <= position.y + tooltipBox.height);
}

/**
 * The tooltip handler class.
 */
class extension_vega_tooltip_module_Handler {
    /**
     * Create the tooltip handler and initialize the element and style.
     *
     * @param options Tooltip Options
     */
    constructor(options) {
        this.options = { ...extension_DEFAULT_OPTIONS, ...options };
        const elementId = this.options.id;
        this.el = null;
        // bind this to call
        this.call = this.tooltipHandler.bind(this);
        // prepend a default stylesheet for tooltips to the head
        if (!this.options.disableDefaultStyle && !document.getElementById(this.options.styleId)) {
            const style = document.createElement('style');
            style.setAttribute('id', this.options.styleId);
            style.innerHTML = extension_createDefaultStyle(elementId);
            const head = document.head;
            if (head.childNodes.length > 0) {
                head.insertBefore(style, head.childNodes[0]);
            }
            else {
                head.appendChild(style);
            }
        }
    }
    /**
     * The tooltip handler function.
     */
    tooltipHandler(handler, event, item, value) {
        // append a div element that we use as a tooltip unless it already exists
        this.el = document.getElementById(this.options.id);
        if (!this.el) {
            this.el = document.createElement('div');
            this.el.setAttribute('id', this.options.id);
            this.el.classList.add('vg-tooltip');
            const tooltipContainer = document.fullscreenElement ?? document.body;
            tooltipContainer.appendChild(this.el);
        }
        // hide tooltip for null, undefined, or empty string values
        if (value == null || value === '') {
            this.el.classList.remove('visible', `${this.options.theme}-theme`);
            return;
        }
        // set the tooltip content
        this.el.innerHTML = this.options.formatTooltip(value, this.options.sanitize, this.options.maxDepth, this.options.baseURL);
        // make the tooltip visible
        this.el.classList.add('visible', `${this.options.theme}-theme`);
        const { x, y } = this.options.anchor === 'mark'
            ? extension_calculatePositionRelativeToMark(handler, event, item, this.el.getBoundingClientRect(), this.options)
            : extension_calculatePositionRelativeToCursor(event, this.el.getBoundingClientRect(), this.options);
        this.el.style.top = `${y}px`;
        this.el.style.left = `${x}px`;
    }
}

const extension_vega_tooltip_module_version = extension_vega_tooltip_module_pkg.version;
/**
 * Create a tooltip handler and register it with the provided view.
 *
 * @param view The Vega view.
 * @param opt Tooltip options.
 */
function extension_vega_tooltip_module_index (view, opt) {
    const handler = new extension_vega_tooltip_module_Handler(opt);
    view.tooltip(handler.call).run();
    return handler;
}


//# sourceMappingURL=vega-tooltip.module.js.map

;// ../../node_modules/vega-embed/build/vega-embed.module.js









/*!
 * https://github.com/Starcounter-Jack/JSON-Patch
 * (c) 2017-2022 Joachim Wester
 * MIT licensed
 */
var extension_extends = ( false) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
var extension_hasOwnProperty = Object.prototype.hasOwnProperty;
function extension_vega_embed_module_hasOwnProperty(obj, key) {
    return extension_hasOwnProperty.call(obj, key);
}
function extension_objectKeys(obj) {
    if (Array.isArray(obj)) {
        var keys_1 = new Array(obj.length);
        for (var k = 0; k < keys_1.length; k++) {
            keys_1[k] = "" + k;
        }
        return keys_1;
    }
    if (Object.keys) {
        return Object.keys(obj);
    }
    var keys = [];
    for (var i in obj) {
        if (extension_vega_embed_module_hasOwnProperty(obj, i)) {
            keys.push(i);
        }
    }
    return keys;
}
/**
* Deeply clone the object.
* https://jsperf.com/deep-copy-vs-json-stringify-json-parse/25 (recursiveDeepCopy)
* @param  {any} obj value to clone
* @return {any} cloned obj
*/
function extension_deepClone(obj) {
    switch (typeof obj) {
        case "object":
            return JSON.parse(JSON.stringify(obj)); //Faster than ES5 clone - http://jsperf.com/deep-cloning-of-objects/5
        case "undefined":
            return null; //this is how JSON.stringify behaves for array items
        default:
            return obj; //no need to clone primitives
    }
}
//3x faster than cached /^\d+$/.test(str)
function extension_vega_embed_module_isInteger(str) {
    var i = 0;
    var len = str.length;
    var charCode;
    while (i < len) {
        charCode = str.charCodeAt(i);
        if (charCode >= 48 && charCode <= 57) {
            i++;
            continue;
        }
        return false;
    }
    return true;
}
/**
* Escapes a json pointer path
* @param path The raw pointer
* @return the Escaped path
*/
function extension_escapePathComponent(path) {
    if (path.indexOf('/') === -1 && path.indexOf('~') === -1)
        return path;
    return path.replace(/~/g, '~0').replace(/\//g, '~1');
}
/**
 * Unescapes a json pointer path
 * @param path The escaped pointer
 * @return The unescaped path
 */
function extension_unescapePathComponent(path) {
    return path.replace(/~1/g, '/').replace(/~0/g, '~');
}
/**
* Recursively checks whether an object has any undefined values inside.
*/
function extension_hasUndefined(obj) {
    if (obj === undefined) {
        return true;
    }
    if (obj) {
        if (Array.isArray(obj)) {
            for (var i_1 = 0, len = obj.length; i_1 < len; i_1++) {
                if (extension_hasUndefined(obj[i_1])) {
                    return true;
                }
            }
        }
        else if (typeof obj === "object") {
            var objKeys = extension_objectKeys(obj);
            var objKeysLength = objKeys.length;
            for (var i = 0; i < objKeysLength; i++) {
                if (extension_hasUndefined(obj[objKeys[i]])) {
                    return true;
                }
            }
        }
    }
    return false;
}
function extension_patchErrorMessageFormatter(message, args) {
    var messageParts = [message];
    for (var key in args) {
        var value = typeof args[key] === 'object' ? JSON.stringify(args[key], null, 2) : args[key]; // pretty print
        if (typeof value !== 'undefined') {
            messageParts.push(key + ": " + value);
        }
    }
    return messageParts.join('\n');
}
var extension_PatchError = /** @class */ (function (_super) {
    extension_extends(PatchError, _super);
    function PatchError(message, name, index, operation, tree) {
        var _newTarget = this.constructor;
        var _this = _super.call(this, extension_patchErrorMessageFormatter(message, { name: name, index: index, operation: operation, tree: tree })) || this;
        _this.name = name;
        _this.index = index;
        _this.operation = operation;
        _this.tree = tree;
        Object.setPrototypeOf(_this, _newTarget.prototype); // restore prototype chain, see https://stackoverflow.com/a/48342359
        _this.message = extension_patchErrorMessageFormatter(message, { name: name, index: index, operation: operation, tree: tree });
        return _this;
    }
    return PatchError;
}(Error));

var extension_JsonPatchError = extension_PatchError;
var src_extension_deepClone = extension_deepClone;
/* We use a Javascript hash to store each
 function. Each hash entry (property) uses
 the operation identifiers specified in rfc6902.
 In this way, we can map each patch operation
 to its dedicated function in efficient way.
 */
/* The operations applicable to an object */
var extension_objOps = {
    add: function (obj, key, document) {
        obj[key] = this.value;
        return { newDocument: document };
    },
    remove: function (obj, key, document) {
        var removed = obj[key];
        delete obj[key];
        return { newDocument: document, removed: removed };
    },
    replace: function (obj, key, document) {
        var removed = obj[key];
        obj[key] = this.value;
        return { newDocument: document, removed: removed };
    },
    move: function (obj, key, document) {
        /* in case move target overwrites an existing value,
        return the removed value, this can be taxing performance-wise,
        and is potentially unneeded */
        var removed = extension_getValueByPointer(document, this.path);
        if (removed) {
            removed = extension_deepClone(removed);
        }
        var originalValue = extension_applyOperation(document, { op: "remove", path: this.from }).removed;
        extension_applyOperation(document, { op: "add", path: this.path, value: originalValue });
        return { newDocument: document, removed: removed };
    },
    copy: function (obj, key, document) {
        var valueToCopy = extension_getValueByPointer(document, this.from);
        // enforce copy by value so further operations don't affect source (see issue #177)
        extension_applyOperation(document, { op: "add", path: this.path, value: extension_deepClone(valueToCopy) });
        return { newDocument: document };
    },
    test: function (obj, key, document) {
        return { newDocument: document, test: extension_areEquals(obj[key], this.value) };
    },
    _get: function (obj, key, document) {
        this.value = obj[key];
        return { newDocument: document };
    }
};
/* The operations applicable to an array. Many are the same as for the object */
var extension_arrOps = {
    add: function (arr, i, document) {
        if (extension_vega_embed_module_isInteger(i)) {
            arr.splice(i, 0, this.value);
        }
        else { // array props
            arr[i] = this.value;
        }
        // this may be needed when using '-' in an array
        return { newDocument: document, index: i };
    },
    remove: function (arr, i, document) {
        var removedList = arr.splice(i, 1);
        return { newDocument: document, removed: removedList[0] };
    },
    replace: function (arr, i, document) {
        var removed = arr[i];
        arr[i] = this.value;
        return { newDocument: document, removed: removed };
    },
    move: extension_objOps.move,
    copy: extension_objOps.copy,
    test: extension_objOps.test,
    _get: extension_objOps._get
};
/**
 * Retrieves a value from a JSON document by a JSON pointer.
 * Returns the value.
 *
 * @param document The document to get the value from
 * @param pointer an escaped JSON pointer
 * @return The retrieved value
 */
function extension_getValueByPointer(document, pointer) {
    if (pointer == '') {
        return document;
    }
    var getOriginalDestination = { op: "_get", path: pointer };
    extension_applyOperation(document, getOriginalDestination);
    return getOriginalDestination.value;
}
/**
 * Apply a single JSON Patch Operation on a JSON document.
 * Returns the {newDocument, result} of the operation.
 * It modifies the `document` and `operation` objects - it gets the values by reference.
 * If you would like to avoid touching your values, clone them:
 * `jsonpatch.applyOperation(document, jsonpatch._deepClone(operation))`.
 *
 * @param document The document to patch
 * @param operation The operation to apply
 * @param validateOperation `false` is without validation, `true` to use default jsonpatch's validation, or you can pass a `validateOperation` callback to be used for validation.
 * @param mutateDocument Whether to mutate the original document or clone it before applying
 * @param banPrototypeModifications Whether to ban modifications to `__proto__`, defaults to `true`.
 * @return `{newDocument, result}` after the operation
 */
function extension_applyOperation(document, operation, validateOperation, mutateDocument, banPrototypeModifications, index) {
    if (validateOperation === void 0) { validateOperation = false; }
    if (mutateDocument === void 0) { mutateDocument = true; }
    if (banPrototypeModifications === void 0) { banPrototypeModifications = true; }
    if (index === void 0) { index = 0; }
    if (validateOperation) {
        if (typeof validateOperation == 'function') {
            validateOperation(operation, 0, document, operation.path);
        }
        else {
            extension_validator(operation, 0);
        }
    }
    /* ROOT OPERATIONS */
    if (operation.path === "") {
        var returnValue = { newDocument: document };
        if (operation.op === 'add') {
            returnValue.newDocument = operation.value;
            return returnValue;
        }
        else if (operation.op === 'replace') {
            returnValue.newDocument = operation.value;
            returnValue.removed = document; //document we removed
            return returnValue;
        }
        else if (operation.op === 'move' || operation.op === 'copy') { // it's a move or copy to root
            returnValue.newDocument = extension_getValueByPointer(document, operation.from); // get the value by json-pointer in `from` field
            if (operation.op === 'move') { // report removed item
                returnValue.removed = document;
            }
            return returnValue;
        }
        else if (operation.op === 'test') {
            returnValue.test = extension_areEquals(document, operation.value);
            if (returnValue.test === false) {
                throw new extension_JsonPatchError("Test operation failed", 'TEST_OPERATION_FAILED', index, operation, document);
            }
            returnValue.newDocument = document;
            return returnValue;
        }
        else if (operation.op === 'remove') { // a remove on root
            returnValue.removed = document;
            returnValue.newDocument = null;
            return returnValue;
        }
        else if (operation.op === '_get') {
            operation.value = document;
            return returnValue;
        }
        else { /* bad operation */
            if (validateOperation) {
                throw new extension_JsonPatchError('Operation `op` property is not one of operations defined in RFC-6902', 'OPERATION_OP_INVALID', index, operation, document);
            }
            else {
                return returnValue;
            }
        }
    } /* END ROOT OPERATIONS */
    else {
        if (!mutateDocument) {
            document = extension_deepClone(document);
        }
        var path = operation.path || "";
        var keys = path.split('/');
        var obj = document;
        var t = 1; //skip empty element - http://jsperf.com/to-shift-or-not-to-shift
        var len = keys.length;
        var existingPathFragment = undefined;
        var key = void 0;
        var validateFunction = void 0;
        if (typeof validateOperation == 'function') {
            validateFunction = validateOperation;
        }
        else {
            validateFunction = extension_validator;
        }
        while (true) {
            key = keys[t];
            if (key && key.indexOf('~') != -1) {
                key = extension_unescapePathComponent(key);
            }
            if (banPrototypeModifications &&
                (key == '__proto__' ||
                    (key == 'prototype' && t > 0 && keys[t - 1] == 'constructor'))) {
                throw new TypeError('JSON-Patch: modifying `__proto__` or `constructor/prototype` prop is banned for security reasons, if this was on purpose, please set `banPrototypeModifications` flag false and pass it to this function. More info in fast-json-patch README');
            }
            if (validateOperation) {
                if (existingPathFragment === undefined) {
                    if (obj[key] === undefined) {
                        existingPathFragment = keys.slice(0, t).join('/');
                    }
                    else if (t == len - 1) {
                        existingPathFragment = operation.path;
                    }
                    if (existingPathFragment !== undefined) {
                        validateFunction(operation, 0, document, existingPathFragment);
                    }
                }
            }
            t++;
            if (Array.isArray(obj)) {
                if (key === '-') {
                    key = obj.length;
                }
                else {
                    if (validateOperation && !extension_vega_embed_module_isInteger(key)) {
                        throw new extension_JsonPatchError("Expected an unsigned base-10 integer value, making the new referenced value the array element with the zero-based index", "OPERATION_PATH_ILLEGAL_ARRAY_INDEX", index, operation, document);
                    } // only parse key when it's an integer for `arr.prop` to work
                    else if (extension_vega_embed_module_isInteger(key)) {
                        key = ~~key;
                    }
                }
                if (t >= len) {
                    if (validateOperation && operation.op === "add" && key > obj.length) {
                        throw new extension_JsonPatchError("The specified index MUST NOT be greater than the number of elements in the array", "OPERATION_VALUE_OUT_OF_BOUNDS", index, operation, document);
                    }
                    var returnValue = extension_arrOps[operation.op].call(operation, obj, key, document); // Apply patch
                    if (returnValue.test === false) {
                        throw new extension_JsonPatchError("Test operation failed", 'TEST_OPERATION_FAILED', index, operation, document);
                    }
                    return returnValue;
                }
            }
            else {
                if (t >= len) {
                    var returnValue = extension_objOps[operation.op].call(operation, obj, key, document); // Apply patch
                    if (returnValue.test === false) {
                        throw new extension_JsonPatchError("Test operation failed", 'TEST_OPERATION_FAILED', index, operation, document);
                    }
                    return returnValue;
                }
            }
            obj = obj[key];
            // If we have more keys in the path, but the next value isn't a non-null object,
            // throw an OPERATION_PATH_UNRESOLVABLE error instead of iterating again.
            if (validateOperation && t < len && (!obj || typeof obj !== "object")) {
                throw new extension_JsonPatchError('Cannot perform operation at the desired path', 'OPERATION_PATH_UNRESOLVABLE', index, operation, document);
            }
        }
    }
}
/**
 * Apply a full JSON Patch array on a JSON document.
 * Returns the {newDocument, result} of the patch.
 * It modifies the `document` object and `patch` - it gets the values by reference.
 * If you would like to avoid touching your values, clone them:
 * `jsonpatch.applyPatch(document, jsonpatch._deepClone(patch))`.
 *
 * @param document The document to patch
 * @param patch The patch to apply
 * @param validateOperation `false` is without validation, `true` to use default jsonpatch's validation, or you can pass a `validateOperation` callback to be used for validation.
 * @param mutateDocument Whether to mutate the original document or clone it before applying
 * @param banPrototypeModifications Whether to ban modifications to `__proto__`, defaults to `true`.
 * @return An array of `{newDocument, result}` after the patch
 */
function extension_applyPatch(document, patch, validateOperation, mutateDocument, banPrototypeModifications) {
    if (mutateDocument === void 0) { mutateDocument = true; }
    if (banPrototypeModifications === void 0) { banPrototypeModifications = true; }
    if (validateOperation) {
        if (!Array.isArray(patch)) {
            throw new extension_JsonPatchError('Patch sequence must be an array', 'SEQUENCE_NOT_AN_ARRAY');
        }
    }
    if (!mutateDocument) {
        document = extension_deepClone(document);
    }
    var results = new Array(patch.length);
    for (var i = 0, length_1 = patch.length; i < length_1; i++) {
        // we don't need to pass mutateDocument argument because if it was true, we already deep cloned the object, we'll just pass `true`
        results[i] = extension_applyOperation(document, patch[i], validateOperation, true, banPrototypeModifications, i);
        document = results[i].newDocument; // in case root was replaced
    }
    results.newDocument = document;
    return results;
}
/**
 * Apply a single JSON Patch Operation on a JSON document.
 * Returns the updated document.
 * Suitable as a reducer.
 *
 * @param document The document to patch
 * @param operation The operation to apply
 * @return The updated document
 */
function extension_applyReducer(document, operation, index) {
    var operationResult = extension_applyOperation(document, operation);
    if (operationResult.test === false) { // failed test
        throw new extension_JsonPatchError("Test operation failed", 'TEST_OPERATION_FAILED', index, operation, document);
    }
    return operationResult.newDocument;
}
/**
 * Validates a single operation. Called from `jsonpatch.validate`. Throws `JsonPatchError` in case of an error.
 * @param {object} operation - operation object (patch)
 * @param {number} index - index of operation in the sequence
 * @param {object} [document] - object where the operation is supposed to be applied
 * @param {string} [existingPathFragment] - comes along with `document`
 */
function extension_validator(operation, index, document, existingPathFragment) {
    if (typeof operation !== 'object' || operation === null || Array.isArray(operation)) {
        throw new extension_JsonPatchError('Operation is not an object', 'OPERATION_NOT_AN_OBJECT', index, operation, document);
    }
    else if (!extension_objOps[operation.op]) {
        throw new extension_JsonPatchError('Operation `op` property is not one of operations defined in RFC-6902', 'OPERATION_OP_INVALID', index, operation, document);
    }
    else if (typeof operation.path !== 'string') {
        throw new extension_JsonPatchError('Operation `path` property is not a string', 'OPERATION_PATH_INVALID', index, operation, document);
    }
    else if (operation.path.indexOf('/') !== 0 && operation.path.length > 0) {
        // paths that aren't empty string should start with "/"
        throw new extension_JsonPatchError('Operation `path` property must start with "/"', 'OPERATION_PATH_INVALID', index, operation, document);
    }
    else if ((operation.op === 'move' || operation.op === 'copy') && typeof operation.from !== 'string') {
        throw new extension_JsonPatchError('Operation `from` property is not present (applicable in `move` and `copy` operations)', 'OPERATION_FROM_REQUIRED', index, operation, document);
    }
    else if ((operation.op === 'add' || operation.op === 'replace' || operation.op === 'test') && operation.value === undefined) {
        throw new extension_JsonPatchError('Operation `value` property is not present (applicable in `add`, `replace` and `test` operations)', 'OPERATION_VALUE_REQUIRED', index, operation, document);
    }
    else if ((operation.op === 'add' || operation.op === 'replace' || operation.op === 'test') && extension_hasUndefined(operation.value)) {
        throw new extension_JsonPatchError('Operation `value` property is not present (applicable in `add`, `replace` and `test` operations)', 'OPERATION_VALUE_CANNOT_CONTAIN_UNDEFINED', index, operation, document);
    }
    else if (document) {
        if (operation.op == "add") {
            var pathLen = operation.path.split("/").length;
            var existingPathLen = existingPathFragment.split("/").length;
            if (pathLen !== existingPathLen + 1 && pathLen !== existingPathLen) {
                throw new extension_JsonPatchError('Cannot perform an `add` operation at the desired path', 'OPERATION_PATH_CANNOT_ADD', index, operation, document);
            }
        }
        else if (operation.op === 'replace' || operation.op === 'remove' || operation.op === '_get') {
            if (operation.path !== existingPathFragment) {
                throw new extension_JsonPatchError('Cannot perform the operation at a path that does not exist', 'OPERATION_PATH_UNRESOLVABLE', index, operation, document);
            }
        }
        else if (operation.op === 'move' || operation.op === 'copy') {
            var existingValue = { op: "_get", path: operation.from, value: undefined };
            var error = extension_validate([existingValue], document);
            if (error && error.name === 'OPERATION_PATH_UNRESOLVABLE') {
                throw new extension_JsonPatchError('Cannot perform the operation from a path that does not exist', 'OPERATION_FROM_UNRESOLVABLE', index, operation, document);
            }
        }
    }
}
/**
 * Validates a sequence of operations. If `document` parameter is provided, the sequence is additionally validated against the object document.
 * If error is encountered, returns a JsonPatchError object
 * @param sequence
 * @param document
 * @returns {JsonPatchError|undefined}
 */
function extension_validate(sequence, document, externalValidator) {
    try {
        if (!Array.isArray(sequence)) {
            throw new extension_JsonPatchError('Patch sequence must be an array', 'SEQUENCE_NOT_AN_ARRAY');
        }
        if (document) {
            //clone document and sequence so that we can safely try applying operations
            extension_applyPatch(extension_deepClone(document), extension_deepClone(sequence), externalValidator || true);
        }
        else {
            externalValidator = externalValidator || extension_validator;
            for (var i = 0; i < sequence.length; i++) {
                externalValidator(sequence[i], i, document, undefined);
            }
        }
    }
    catch (e) {
        if (e instanceof extension_JsonPatchError) {
            return e;
        }
        else {
            throw e;
        }
    }
}
// based on https://github.com/epoberezkin/fast-deep-equal
// MIT License
// Copyright (c) 2017 Evgeny Poberezkin
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
function extension_areEquals(a, b) {
    if (a === b)
        return true;
    if (a && b && typeof a == 'object' && typeof b == 'object') {
        var arrA = Array.isArray(a), arrB = Array.isArray(b), i, length, key;
        if (arrA && arrB) {
            length = a.length;
            if (length != b.length)
                return false;
            for (i = length; i-- !== 0;)
                if (!extension_areEquals(a[i], b[i]))
                    return false;
            return true;
        }
        if (arrA != arrB)
            return false;
        var keys = Object.keys(a);
        length = keys.length;
        if (length !== Object.keys(b).length)
            return false;
        for (i = length; i-- !== 0;)
            if (!b.hasOwnProperty(keys[i]))
                return false;
        for (i = length; i-- !== 0;) {
            key = keys[i];
            if (!extension_areEquals(a[key], b[key]))
                return false;
        }
        return true;
    }
    return a !== a && b !== b;
}

var extension_core = /*#__PURE__*/Object.freeze({
    __proto__: null,
    JsonPatchError: extension_JsonPatchError,
    _areEquals: extension_areEquals,
    applyOperation: extension_applyOperation,
    applyPatch: extension_applyPatch,
    applyReducer: extension_applyReducer,
    deepClone: src_extension_deepClone,
    getValueByPointer: extension_getValueByPointer,
    validate: extension_validate,
    validator: extension_validator
});

/*!
 * https://github.com/Starcounter-Jack/JSON-Patch
 * (c) 2017-2021 Joachim Wester
 * MIT license
 */
var extension_beforeDict = new WeakMap();
var extension_Mirror = /** @class */ (function () {
    function Mirror(obj) {
        this.observers = new Map();
        this.obj = obj;
    }
    return Mirror;
}());
var extension_ObserverInfo = /** @class */ (function () {
    function ObserverInfo(callback, observer) {
        this.callback = callback;
        this.observer = observer;
    }
    return ObserverInfo;
}());
function extension_getMirror(obj) {
    return extension_beforeDict.get(obj);
}
function extension_getObserverFromMirror(mirror, callback) {
    return mirror.observers.get(callback);
}
function extension_removeObserverFromMirror(mirror, observer) {
    mirror.observers.delete(observer.callback);
}
/**
 * Detach an observer from an object
 */
function extension_unobserve(root, observer) {
    observer.unobserve();
}
/**
 * Observes changes made to an object, which can then be retrieved using generate
 */
function extension_observe(obj, callback) {
    var patches = [];
    var observer;
    var mirror = extension_getMirror(obj);
    if (!mirror) {
        mirror = new extension_Mirror(obj);
        extension_beforeDict.set(obj, mirror);
    }
    else {
        var observerInfo = extension_getObserverFromMirror(mirror, callback);
        observer = observerInfo && observerInfo.observer;
    }
    if (observer) {
        return observer;
    }
    observer = {};
    mirror.value = extension_deepClone(obj);
    if (callback) {
        observer.callback = callback;
        observer.next = null;
        var dirtyCheck = function () {
            extension_vega_embed_module_generate(observer);
        };
        var fastCheck = function () {
            clearTimeout(observer.next);
            observer.next = setTimeout(dirtyCheck);
        };
        if (typeof window !== 'undefined') { //not Node
            window.addEventListener('mouseup', fastCheck);
            window.addEventListener('keyup', fastCheck);
            window.addEventListener('mousedown', fastCheck);
            window.addEventListener('keydown', fastCheck);
            window.addEventListener('change', fastCheck);
        }
    }
    observer.patches = patches;
    observer.object = obj;
    observer.unobserve = function () {
        extension_vega_embed_module_generate(observer);
        clearTimeout(observer.next);
        extension_removeObserverFromMirror(mirror, observer);
        if (typeof window !== 'undefined') {
            window.removeEventListener('mouseup', fastCheck);
            window.removeEventListener('keyup', fastCheck);
            window.removeEventListener('mousedown', fastCheck);
            window.removeEventListener('keydown', fastCheck);
            window.removeEventListener('change', fastCheck);
        }
    };
    mirror.observers.set(callback, new extension_ObserverInfo(callback, observer));
    return observer;
}
/**
 * Generate an array of patches from an observer
 */
function extension_vega_embed_module_generate(observer, invertible) {
    if (invertible === void 0) { invertible = false; }
    var mirror = extension_beforeDict.get(observer.object);
    src_extension_generate(mirror.value, observer.object, observer.patches, "", invertible);
    if (observer.patches.length) {
        extension_applyPatch(mirror.value, observer.patches);
    }
    var temp = observer.patches;
    if (temp.length > 0) {
        observer.patches = [];
        if (observer.callback) {
            observer.callback(temp);
        }
    }
    return temp;
}
// Dirty check if obj is different from mirror, generate patches and update mirror
function src_extension_generate(mirror, obj, patches, path, invertible) {
    if (obj === mirror) {
        return;
    }
    if (typeof obj.toJSON === "function") {
        obj = obj.toJSON();
    }
    var newKeys = extension_objectKeys(obj);
    var oldKeys = extension_objectKeys(mirror);
    var deleted = false;
    //if ever "move" operation is implemented here, make sure this test runs OK: "should not generate the same patch twice (move)"
    for (var t = oldKeys.length - 1; t >= 0; t--) {
        var key = oldKeys[t];
        var oldVal = mirror[key];
        if (extension_vega_embed_module_hasOwnProperty(obj, key) && !(obj[key] === undefined && oldVal !== undefined && Array.isArray(obj) === false)) {
            var newVal = obj[key];
            if (typeof oldVal == "object" && oldVal != null && typeof newVal == "object" && newVal != null && Array.isArray(oldVal) === Array.isArray(newVal)) {
                src_extension_generate(oldVal, newVal, patches, path + "/" + extension_escapePathComponent(key), invertible);
            }
            else {
                if (oldVal !== newVal) {
                    if (invertible) {
                        patches.push({ op: "test", path: path + "/" + extension_escapePathComponent(key), value: extension_deepClone(oldVal) });
                    }
                    patches.push({ op: "replace", path: path + "/" + extension_escapePathComponent(key), value: extension_deepClone(newVal) });
                }
            }
        }
        else if (Array.isArray(mirror) === Array.isArray(obj)) {
            if (invertible) {
                patches.push({ op: "test", path: path + "/" + extension_escapePathComponent(key), value: extension_deepClone(oldVal) });
            }
            patches.push({ op: "remove", path: path + "/" + extension_escapePathComponent(key) });
            deleted = true; // property has been deleted
        }
        else {
            if (invertible) {
                patches.push({ op: "test", path: path, value: mirror });
            }
            patches.push({ op: "replace", path: path, value: obj });
        }
    }
    if (!deleted && newKeys.length == oldKeys.length) {
        return;
    }
    for (var t = 0; t < newKeys.length; t++) {
        var key = newKeys[t];
        if (!extension_vega_embed_module_hasOwnProperty(mirror, key) && obj[key] !== undefined) {
            patches.push({ op: "add", path: path + "/" + extension_escapePathComponent(key), value: extension_deepClone(obj[key]) });
        }
    }
}
/**
 * Create an array of patches from the differences in two objects
 */
function extension_vega_embed_module_compare(tree1, tree2, invertible) {
    if (invertible === void 0) { invertible = false; }
    var patches = [];
    src_extension_generate(tree1, tree2, patches, '', invertible);
    return patches;
}

var extension_duplex = /*#__PURE__*/Object.freeze({
    __proto__: null,
    compare: extension_vega_embed_module_compare,
    generate: extension_vega_embed_module_generate,
    observe: extension_observe,
    unobserve: extension_unobserve
});

Object.assign({}, extension_core, extension_duplex, {
    JsonPatchError: extension_PatchError,
    deepClone: extension_deepClone,
    escapePathComponent: extension_escapePathComponent,
    unescapePathComponent: extension_unescapePathComponent
});

function extension_getDefaultExportFromCjs (x) {
	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
}

var extension_lrucache;
var extension_hasRequiredLrucache;

function extension_requireLrucache () {
	if (extension_hasRequiredLrucache) return extension_lrucache;
	extension_hasRequiredLrucache = 1;
	class LRUCache {
	  constructor () {
	    this.max = 1000;
	    this.map = new Map();
	  }

	  get (key) {
	    const value = this.map.get(key);
	    if (value === undefined) {
	      return undefined
	    } else {
	      // Remove the key from the map and add it to the end
	      this.map.delete(key);
	      this.map.set(key, value);
	      return value
	    }
	  }

	  delete (key) {
	    return this.map.delete(key)
	  }

	  set (key, value) {
	    const deleted = this.delete(key);

	    if (!deleted && value !== undefined) {
	      // If cache is full, delete the least recently used item
	      if (this.map.size >= this.max) {
	        const firstKey = this.map.keys().next().value;
	        this.delete(firstKey);
	      }

	      this.map.set(key, value);
	    }

	    return this
	  }
	}

	extension_lrucache = LRUCache;
	return extension_lrucache;
}

var extension_parseOptions_1;
var extension_hasRequiredParseOptions;

function extension_requireParseOptions () {
	if (extension_hasRequiredParseOptions) return extension_parseOptions_1;
	extension_hasRequiredParseOptions = 1;
	// parse out just the options we care about
	const looseOption = Object.freeze({ loose: true });
	const emptyOpts = Object.freeze({ });
	const parseOptions = options => {
	  if (!options) {
	    return emptyOpts
	  }

	  if (typeof options !== 'object') {
	    return looseOption
	  }

	  return options
	};
	extension_parseOptions_1 = parseOptions;
	return extension_parseOptions_1;
}

var extension_vega_embed_module_re = {exports: {}};

var extension_vega_embed_module_constants;
var extension_hasRequiredConstants;

function extension_requireConstants () {
	if (extension_hasRequiredConstants) return extension_vega_embed_module_constants;
	extension_hasRequiredConstants = 1;
	// Note: this is the semver.org version of the spec that it implements
	// Not necessarily the package version of this code.
	const SEMVER_SPEC_VERSION = '2.0.0';

	const MAX_LENGTH = 256;
	const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER ||
	/* istanbul ignore next */ 9007199254740991;

	// Max safe segment length for coercion.
	const MAX_SAFE_COMPONENT_LENGTH = 16;

	// Max safe length for a build identifier. The max length minus 6 characters for
	// the shortest version with a build 0.0.0+BUILD.
	const MAX_SAFE_BUILD_LENGTH = MAX_LENGTH - 6;

	const RELEASE_TYPES = [
	  'major',
	  'premajor',
	  'minor',
	  'preminor',
	  'patch',
	  'prepatch',
	  'prerelease',
	];

	extension_vega_embed_module_constants = {
	  MAX_LENGTH,
	  MAX_SAFE_COMPONENT_LENGTH,
	  MAX_SAFE_BUILD_LENGTH,
	  MAX_SAFE_INTEGER,
	  RELEASE_TYPES,
	  SEMVER_SPEC_VERSION,
	  FLAG_INCLUDE_PRERELEASE: 0b001,
	  FLAG_LOOSE: 0b010,
	};
	return extension_vega_embed_module_constants;
}

var extension_debug_1;
var extension_hasRequiredDebug;

function extension_requireDebug () {
	if (extension_hasRequiredDebug) return extension_debug_1;
	extension_hasRequiredDebug = 1;
	const debug = (
	  typeof process === 'object' &&
	  process.env &&
	  process.env.NODE_DEBUG &&
	  /\bsemver\b/i.test(process.env.NODE_DEBUG)
	) ? (...args) => console.error('SEMVER', ...args)
	  : () => {};

	extension_debug_1 = debug;
	return extension_debug_1;
}

var extension_hasRequiredRe;

function extension_requireRe () {
	if (extension_hasRequiredRe) return extension_vega_embed_module_re.exports;
	extension_hasRequiredRe = 1;
	(function (module, exports) {
		const {
		  MAX_SAFE_COMPONENT_LENGTH,
		  MAX_SAFE_BUILD_LENGTH,
		  MAX_LENGTH,
		} = extension_requireConstants();
		const debug = extension_requireDebug();
		exports = module.exports = {};

		// The actual regexps go on exports.re
		const re = exports.re = [];
		const safeRe = exports.safeRe = [];
		const src = exports.src = [];
		const t = exports.t = {};
		let R = 0;

		const LETTERDASHNUMBER = '[a-zA-Z0-9-]';

		// Replace some greedy regex tokens to prevent regex dos issues. These regex are
		// used internally via the safeRe object since all inputs in this library get
		// normalized first to trim and collapse all extra whitespace. The original
		// regexes are exported for userland consumption and lower level usage. A
		// future breaking change could export the safer regex only with a note that
		// all input should have extra whitespace removed.
		const safeRegexReplacements = [
		  ['\\s', 1],
		  ['\\d', MAX_LENGTH],
		  [LETTERDASHNUMBER, MAX_SAFE_BUILD_LENGTH],
		];

		const makeSafeRegex = (value) => {
		  for (const [token, max] of safeRegexReplacements) {
		    value = value
		      .split(`${token}*`).join(`${token}{0,${max}}`)
		      .split(`${token}+`).join(`${token}{1,${max}}`);
		  }
		  return value
		};

		const createToken = (name, value, isGlobal) => {
		  const safe = makeSafeRegex(value);
		  const index = R++;
		  debug(name, index, value);
		  t[name] = index;
		  src[index] = value;
		  re[index] = new RegExp(value, isGlobal ? 'g' : undefined);
		  safeRe[index] = new RegExp(safe, isGlobal ? 'g' : undefined);
		};

		// The following Regular Expressions can be used for tokenizing,
		// validating, and parsing SemVer version strings.

		// ## Numeric Identifier
		// A single `0`, or a non-zero digit followed by zero or more digits.

		createToken('NUMERICIDENTIFIER', '0|[1-9]\\d*');
		createToken('NUMERICIDENTIFIERLOOSE', '\\d+');

		// ## Non-numeric Identifier
		// Zero or more digits, followed by a letter or hyphen, and then zero or
		// more letters, digits, or hyphens.

		createToken('NONNUMERICIDENTIFIER', `\\d*[a-zA-Z-]${LETTERDASHNUMBER}*`);

		// ## Main Version
		// Three dot-separated numeric identifiers.

		createToken('MAINVERSION', `(${src[t.NUMERICIDENTIFIER]})\\.` +
		                   `(${src[t.NUMERICIDENTIFIER]})\\.` +
		                   `(${src[t.NUMERICIDENTIFIER]})`);

		createToken('MAINVERSIONLOOSE', `(${src[t.NUMERICIDENTIFIERLOOSE]})\\.` +
		                        `(${src[t.NUMERICIDENTIFIERLOOSE]})\\.` +
		                        `(${src[t.NUMERICIDENTIFIERLOOSE]})`);

		// ## Pre-release Version Identifier
		// A numeric identifier, or a non-numeric identifier.

		createToken('PRERELEASEIDENTIFIER', `(?:${src[t.NUMERICIDENTIFIER]
		}|${src[t.NONNUMERICIDENTIFIER]})`);

		createToken('PRERELEASEIDENTIFIERLOOSE', `(?:${src[t.NUMERICIDENTIFIERLOOSE]
		}|${src[t.NONNUMERICIDENTIFIER]})`);

		// ## Pre-release Version
		// Hyphen, followed by one or more dot-separated pre-release version
		// identifiers.

		createToken('PRERELEASE', `(?:-(${src[t.PRERELEASEIDENTIFIER]
		}(?:\\.${src[t.PRERELEASEIDENTIFIER]})*))`);

		createToken('PRERELEASELOOSE', `(?:-?(${src[t.PRERELEASEIDENTIFIERLOOSE]
		}(?:\\.${src[t.PRERELEASEIDENTIFIERLOOSE]})*))`);

		// ## Build Metadata Identifier
		// Any combination of digits, letters, or hyphens.

		createToken('BUILDIDENTIFIER', `${LETTERDASHNUMBER}+`);

		// ## Build Metadata
		// Plus sign, followed by one or more period-separated build metadata
		// identifiers.

		createToken('BUILD', `(?:\\+(${src[t.BUILDIDENTIFIER]
		}(?:\\.${src[t.BUILDIDENTIFIER]})*))`);

		// ## Full Version String
		// A main version, followed optionally by a pre-release version and
		// build metadata.

		// Note that the only major, minor, patch, and pre-release sections of
		// the version string are capturing groups.  The build metadata is not a
		// capturing group, because it should not ever be used in version
		// comparison.

		createToken('FULLPLAIN', `v?${src[t.MAINVERSION]
		}${src[t.PRERELEASE]}?${
		  src[t.BUILD]}?`);

		createToken('FULL', `^${src[t.FULLPLAIN]}$`);

		// like full, but allows v1.2.3 and =1.2.3, which people do sometimes.
		// also, 1.0.0alpha1 (prerelease without the hyphen) which is pretty
		// common in the npm registry.
		createToken('LOOSEPLAIN', `[v=\\s]*${src[t.MAINVERSIONLOOSE]
		}${src[t.PRERELEASELOOSE]}?${
		  src[t.BUILD]}?`);

		createToken('LOOSE', `^${src[t.LOOSEPLAIN]}$`);

		createToken('GTLT', '((?:<|>)?=?)');

		// Something like "2.*" or "1.2.x".
		// Note that "x.x" is a valid xRange identifer, meaning "any version"
		// Only the first item is strictly required.
		createToken('XRANGEIDENTIFIERLOOSE', `${src[t.NUMERICIDENTIFIERLOOSE]}|x|X|\\*`);
		createToken('XRANGEIDENTIFIER', `${src[t.NUMERICIDENTIFIER]}|x|X|\\*`);

		createToken('XRANGEPLAIN', `[v=\\s]*(${src[t.XRANGEIDENTIFIER]})` +
		                   `(?:\\.(${src[t.XRANGEIDENTIFIER]})` +
		                   `(?:\\.(${src[t.XRANGEIDENTIFIER]})` +
		                   `(?:${src[t.PRERELEASE]})?${
		                     src[t.BUILD]}?` +
		                   `)?)?`);

		createToken('XRANGEPLAINLOOSE', `[v=\\s]*(${src[t.XRANGEIDENTIFIERLOOSE]})` +
		                        `(?:\\.(${src[t.XRANGEIDENTIFIERLOOSE]})` +
		                        `(?:\\.(${src[t.XRANGEIDENTIFIERLOOSE]})` +
		                        `(?:${src[t.PRERELEASELOOSE]})?${
		                          src[t.BUILD]}?` +
		                        `)?)?`);

		createToken('XRANGE', `^${src[t.GTLT]}\\s*${src[t.XRANGEPLAIN]}$`);
		createToken('XRANGELOOSE', `^${src[t.GTLT]}\\s*${src[t.XRANGEPLAINLOOSE]}$`);

		// Coercion.
		// Extract anything that could conceivably be a part of a valid semver
		createToken('COERCEPLAIN', `${'(^|[^\\d])' +
		              '(\\d{1,'}${MAX_SAFE_COMPONENT_LENGTH}})` +
		              `(?:\\.(\\d{1,${MAX_SAFE_COMPONENT_LENGTH}}))?` +
		              `(?:\\.(\\d{1,${MAX_SAFE_COMPONENT_LENGTH}}))?`);
		createToken('COERCE', `${src[t.COERCEPLAIN]}(?:$|[^\\d])`);
		createToken('COERCEFULL', src[t.COERCEPLAIN] +
		              `(?:${src[t.PRERELEASE]})?` +
		              `(?:${src[t.BUILD]})?` +
		              `(?:$|[^\\d])`);
		createToken('COERCERTL', src[t.COERCE], true);
		createToken('COERCERTLFULL', src[t.COERCEFULL], true);

		// Tilde ranges.
		// Meaning is "reasonably at or greater than"
		createToken('LONETILDE', '(?:~>?)');

		createToken('TILDETRIM', `(\\s*)${src[t.LONETILDE]}\\s+`, true);
		exports.tildeTrimReplace = '$1~';

		createToken('TILDE', `^${src[t.LONETILDE]}${src[t.XRANGEPLAIN]}$`);
		createToken('TILDELOOSE', `^${src[t.LONETILDE]}${src[t.XRANGEPLAINLOOSE]}$`);

		// Caret ranges.
		// Meaning is "at least and backwards compatible with"
		createToken('LONECARET', '(?:\\^)');

		createToken('CARETTRIM', `(\\s*)${src[t.LONECARET]}\\s+`, true);
		exports.caretTrimReplace = '$1^';

		createToken('CARET', `^${src[t.LONECARET]}${src[t.XRANGEPLAIN]}$`);
		createToken('CARETLOOSE', `^${src[t.LONECARET]}${src[t.XRANGEPLAINLOOSE]}$`);

		// A simple gt/lt/eq thing, or just "" to indicate "any version"
		createToken('COMPARATORLOOSE', `^${src[t.GTLT]}\\s*(${src[t.LOOSEPLAIN]})$|^$`);
		createToken('COMPARATOR', `^${src[t.GTLT]}\\s*(${src[t.FULLPLAIN]})$|^$`);

		// An expression to strip any whitespace between the gtlt and the thing
		// it modifies, so that `> 1.2.3` ==> `>1.2.3`
		createToken('COMPARATORTRIM', `(\\s*)${src[t.GTLT]
		}\\s*(${src[t.LOOSEPLAIN]}|${src[t.XRANGEPLAIN]})`, true);
		exports.comparatorTrimReplace = '$1$2$3';

		// Something like `1.2.3 - 1.2.4`
		// Note that these all use the loose form, because they'll be
		// checked against either the strict or loose comparator form
		// later.
		createToken('HYPHENRANGE', `^\\s*(${src[t.XRANGEPLAIN]})` +
		                   `\\s+-\\s+` +
		                   `(${src[t.XRANGEPLAIN]})` +
		                   `\\s*$`);

		createToken('HYPHENRANGELOOSE', `^\\s*(${src[t.XRANGEPLAINLOOSE]})` +
		                        `\\s+-\\s+` +
		                        `(${src[t.XRANGEPLAINLOOSE]})` +
		                        `\\s*$`);

		// Star ranges basically just allow anything at all.
		createToken('STAR', '(<|>)?=?\\s*\\*');
		// >=0.0.0 is like a star
		createToken('GTE0', '^\\s*>=\\s*0\\.0\\.0\\s*$');
		createToken('GTE0PRE', '^\\s*>=\\s*0\\.0\\.0-0\\s*$'); 
	} (extension_vega_embed_module_re, extension_vega_embed_module_re.exports));
	return extension_vega_embed_module_re.exports;
}

var extension_identifiers;
var extension_hasRequiredIdentifiers;

function extension_requireIdentifiers () {
	if (extension_hasRequiredIdentifiers) return extension_identifiers;
	extension_hasRequiredIdentifiers = 1;
	const numeric = /^[0-9]+$/;
	const compareIdentifiers = (a, b) => {
	  const anum = numeric.test(a);
	  const bnum = numeric.test(b);

	  if (anum && bnum) {
	    a = +a;
	    b = +b;
	  }

	  return a === b ? 0
	    : (anum && !bnum) ? -1
	    : (bnum && !anum) ? 1
	    : a < b ? -1
	    : 1
	};

	const rcompareIdentifiers = (a, b) => compareIdentifiers(b, a);

	extension_identifiers = {
	  compareIdentifiers,
	  rcompareIdentifiers,
	};
	return extension_identifiers;
}

var extension_semver;
var extension_hasRequiredSemver;

function extension_requireSemver () {
	if (extension_hasRequiredSemver) return extension_semver;
	extension_hasRequiredSemver = 1;
	const debug = extension_requireDebug();
	const { MAX_LENGTH, MAX_SAFE_INTEGER } = extension_requireConstants();
	const { safeRe: re, t } = extension_requireRe();

	const parseOptions = extension_requireParseOptions();
	const { compareIdentifiers } = extension_requireIdentifiers();
	class SemVer {
	  constructor (version, options) {
	    options = parseOptions(options);

	    if (version instanceof SemVer) {
	      if (version.loose === !!options.loose &&
	          version.includePrerelease === !!options.includePrerelease) {
	        return version
	      } else {
	        version = version.version;
	      }
	    } else if (typeof version !== 'string') {
	      throw new TypeError(`Invalid version. Must be a string. Got type "${typeof version}".`)
	    }

	    if (version.length > MAX_LENGTH) {
	      throw new TypeError(
	        `version is longer than ${MAX_LENGTH} characters`
	      )
	    }

	    debug('SemVer', version, options);
	    this.options = options;
	    this.loose = !!options.loose;
	    // this isn't actually relevant for versions, but keep it so that we
	    // don't run into trouble passing this.options around.
	    this.includePrerelease = !!options.includePrerelease;

	    const m = version.trim().match(options.loose ? re[t.LOOSE] : re[t.FULL]);

	    if (!m) {
	      throw new TypeError(`Invalid Version: ${version}`)
	    }

	    this.raw = version;

	    // these are actually numbers
	    this.major = +m[1];
	    this.minor = +m[2];
	    this.patch = +m[3];

	    if (this.major > MAX_SAFE_INTEGER || this.major < 0) {
	      throw new TypeError('Invalid major version')
	    }

	    if (this.minor > MAX_SAFE_INTEGER || this.minor < 0) {
	      throw new TypeError('Invalid minor version')
	    }

	    if (this.patch > MAX_SAFE_INTEGER || this.patch < 0) {
	      throw new TypeError('Invalid patch version')
	    }

	    // numberify any prerelease numeric ids
	    if (!m[4]) {
	      this.prerelease = [];
	    } else {
	      this.prerelease = m[4].split('.').map((id) => {
	        if (/^[0-9]+$/.test(id)) {
	          const num = +id;
	          if (num >= 0 && num < MAX_SAFE_INTEGER) {
	            return num
	          }
	        }
	        return id
	      });
	    }

	    this.build = m[5] ? m[5].split('.') : [];
	    this.format();
	  }

	  format () {
	    this.version = `${this.major}.${this.minor}.${this.patch}`;
	    if (this.prerelease.length) {
	      this.version += `-${this.prerelease.join('.')}`;
	    }
	    return this.version
	  }

	  toString () {
	    return this.version
	  }

	  compare (other) {
	    debug('SemVer.compare', this.version, this.options, other);
	    if (!(other instanceof SemVer)) {
	      if (typeof other === 'string' && other === this.version) {
	        return 0
	      }
	      other = new SemVer(other, this.options);
	    }

	    if (other.version === this.version) {
	      return 0
	    }

	    return this.compareMain(other) || this.comparePre(other)
	  }

	  compareMain (other) {
	    if (!(other instanceof SemVer)) {
	      other = new SemVer(other, this.options);
	    }

	    return (
	      compareIdentifiers(this.major, other.major) ||
	      compareIdentifiers(this.minor, other.minor) ||
	      compareIdentifiers(this.patch, other.patch)
	    )
	  }

	  comparePre (other) {
	    if (!(other instanceof SemVer)) {
	      other = new SemVer(other, this.options);
	    }

	    // NOT having a prerelease is > having one
	    if (this.prerelease.length && !other.prerelease.length) {
	      return -1
	    } else if (!this.prerelease.length && other.prerelease.length) {
	      return 1
	    } else if (!this.prerelease.length && !other.prerelease.length) {
	      return 0
	    }

	    let i = 0;
	    do {
	      const a = this.prerelease[i];
	      const b = other.prerelease[i];
	      debug('prerelease compare', i, a, b);
	      if (a === undefined && b === undefined) {
	        return 0
	      } else if (b === undefined) {
	        return 1
	      } else if (a === undefined) {
	        return -1
	      } else if (a === b) {
	        continue
	      } else {
	        return compareIdentifiers(a, b)
	      }
	    } while (++i)
	  }

	  compareBuild (other) {
	    if (!(other instanceof SemVer)) {
	      other = new SemVer(other, this.options);
	    }

	    let i = 0;
	    do {
	      const a = this.build[i];
	      const b = other.build[i];
	      debug('build compare', i, a, b);
	      if (a === undefined && b === undefined) {
	        return 0
	      } else if (b === undefined) {
	        return 1
	      } else if (a === undefined) {
	        return -1
	      } else if (a === b) {
	        continue
	      } else {
	        return compareIdentifiers(a, b)
	      }
	    } while (++i)
	  }

	  // preminor will bump the version up to the next minor release, and immediately
	  // down to pre-release. premajor and prepatch work the same way.
	  inc (release, identifier, identifierBase) {
	    switch (release) {
	      case 'premajor':
	        this.prerelease.length = 0;
	        this.patch = 0;
	        this.minor = 0;
	        this.major++;
	        this.inc('pre', identifier, identifierBase);
	        break
	      case 'preminor':
	        this.prerelease.length = 0;
	        this.patch = 0;
	        this.minor++;
	        this.inc('pre', identifier, identifierBase);
	        break
	      case 'prepatch':
	        // If this is already a prerelease, it will bump to the next version
	        // drop any prereleases that might already exist, since they are not
	        // relevant at this point.
	        this.prerelease.length = 0;
	        this.inc('patch', identifier, identifierBase);
	        this.inc('pre', identifier, identifierBase);
	        break
	      // If the input is a non-prerelease version, this acts the same as
	      // prepatch.
	      case 'prerelease':
	        if (this.prerelease.length === 0) {
	          this.inc('patch', identifier, identifierBase);
	        }
	        this.inc('pre', identifier, identifierBase);
	        break

	      case 'major':
	        // If this is a pre-major version, bump up to the same major version.
	        // Otherwise increment major.
	        // 1.0.0-5 bumps to 1.0.0
	        // 1.1.0 bumps to 2.0.0
	        if (
	          this.minor !== 0 ||
	          this.patch !== 0 ||
	          this.prerelease.length === 0
	        ) {
	          this.major++;
	        }
	        this.minor = 0;
	        this.patch = 0;
	        this.prerelease = [];
	        break
	      case 'minor':
	        // If this is a pre-minor version, bump up to the same minor version.
	        // Otherwise increment minor.
	        // 1.2.0-5 bumps to 1.2.0
	        // 1.2.1 bumps to 1.3.0
	        if (this.patch !== 0 || this.prerelease.length === 0) {
	          this.minor++;
	        }
	        this.patch = 0;
	        this.prerelease = [];
	        break
	      case 'patch':
	        // If this is not a pre-release version, it will increment the patch.
	        // If it is a pre-release it will bump up to the same patch version.
	        // 1.2.0-5 patches to 1.2.0
	        // 1.2.0 patches to 1.2.1
	        if (this.prerelease.length === 0) {
	          this.patch++;
	        }
	        this.prerelease = [];
	        break
	      // This probably shouldn't be used publicly.
	      // 1.0.0 'pre' would become 1.0.0-0 which is the wrong direction.
	      case 'pre': {
	        const base = Number(identifierBase) ? 1 : 0;

	        if (!identifier && identifierBase === false) {
	          throw new Error('invalid increment argument: identifier is empty')
	        }

	        if (this.prerelease.length === 0) {
	          this.prerelease = [base];
	        } else {
	          let i = this.prerelease.length;
	          while (--i >= 0) {
	            if (typeof this.prerelease[i] === 'number') {
	              this.prerelease[i]++;
	              i = -2;
	            }
	          }
	          if (i === -1) {
	            // didn't increment anything
	            if (identifier === this.prerelease.join('.') && identifierBase === false) {
	              throw new Error('invalid increment argument: identifier already exists')
	            }
	            this.prerelease.push(base);
	          }
	        }
	        if (identifier) {
	          // 1.2.0-beta.1 bumps to 1.2.0-beta.2,
	          // 1.2.0-beta.fooblz or 1.2.0-beta bumps to 1.2.0-beta.0
	          let prerelease = [identifier, base];
	          if (identifierBase === false) {
	            prerelease = [identifier];
	          }
	          if (compareIdentifiers(this.prerelease[0], identifier) === 0) {
	            if (isNaN(this.prerelease[1])) {
	              this.prerelease = prerelease;
	            }
	          } else {
	            this.prerelease = prerelease;
	          }
	        }
	        break
	      }
	      default:
	        throw new Error(`invalid increment argument: ${release}`)
	    }
	    this.raw = this.format();
	    if (this.build.length) {
	      this.raw += `+${this.build.join('.')}`;
	    }
	    return this
	  }
	}

	extension_semver = SemVer;
	return extension_semver;
}

var extension_compare_1;
var extension_hasRequiredCompare;

function extension_requireCompare () {
	if (extension_hasRequiredCompare) return extension_compare_1;
	extension_hasRequiredCompare = 1;
	const SemVer = extension_requireSemver();
	const compare = (a, b, loose) =>
	  new SemVer(a, loose).compare(new SemVer(b, loose));

	extension_compare_1 = compare;
	return extension_compare_1;
}

var extension_eq_1;
var extension_hasRequiredEq;

function extension_requireEq () {
	if (extension_hasRequiredEq) return extension_eq_1;
	extension_hasRequiredEq = 1;
	const compare = extension_requireCompare();
	const eq = (a, b, loose) => compare(a, b, loose) === 0;
	extension_eq_1 = eq;
	return extension_eq_1;
}

var extension_neq_1;
var extension_hasRequiredNeq;

function extension_requireNeq () {
	if (extension_hasRequiredNeq) return extension_neq_1;
	extension_hasRequiredNeq = 1;
	const compare = extension_requireCompare();
	const neq = (a, b, loose) => compare(a, b, loose) !== 0;
	extension_neq_1 = neq;
	return extension_neq_1;
}

var extension_gt_1;
var extension_hasRequiredGt;

function extension_requireGt () {
	if (extension_hasRequiredGt) return extension_gt_1;
	extension_hasRequiredGt = 1;
	const compare = extension_requireCompare();
	const gt = (a, b, loose) => compare(a, b, loose) > 0;
	extension_gt_1 = gt;
	return extension_gt_1;
}

var extension_gte_1;
var extension_hasRequiredGte;

function extension_requireGte () {
	if (extension_hasRequiredGte) return extension_gte_1;
	extension_hasRequiredGte = 1;
	const compare = extension_requireCompare();
	const gte = (a, b, loose) => compare(a, b, loose) >= 0;
	extension_gte_1 = gte;
	return extension_gte_1;
}

var extension_lt_1;
var extension_hasRequiredLt;

function extension_requireLt () {
	if (extension_hasRequiredLt) return extension_lt_1;
	extension_hasRequiredLt = 1;
	const compare = extension_requireCompare();
	const lt = (a, b, loose) => compare(a, b, loose) < 0;
	extension_lt_1 = lt;
	return extension_lt_1;
}

var extension_lte_1;
var extension_hasRequiredLte;

function extension_requireLte () {
	if (extension_hasRequiredLte) return extension_lte_1;
	extension_hasRequiredLte = 1;
	const compare = extension_requireCompare();
	const lte = (a, b, loose) => compare(a, b, loose) <= 0;
	extension_lte_1 = lte;
	return extension_lte_1;
}

var extension_cmp_1;
var extension_hasRequiredCmp;

function extension_requireCmp () {
	if (extension_hasRequiredCmp) return extension_cmp_1;
	extension_hasRequiredCmp = 1;
	const eq = extension_requireEq();
	const neq = extension_requireNeq();
	const gt = extension_requireGt();
	const gte = extension_requireGte();
	const lt = extension_requireLt();
	const lte = extension_requireLte();

	const cmp = (a, op, b, loose) => {
	  switch (op) {
	    case '===':
	      if (typeof a === 'object') {
	        a = a.version;
	      }
	      if (typeof b === 'object') {
	        b = b.version;
	      }
	      return a === b

	    case '!==':
	      if (typeof a === 'object') {
	        a = a.version;
	      }
	      if (typeof b === 'object') {
	        b = b.version;
	      }
	      return a !== b

	    case '':
	    case '=':
	    case '==':
	      return eq(a, b, loose)

	    case '!=':
	      return neq(a, b, loose)

	    case '>':
	      return gt(a, b, loose)

	    case '>=':
	      return gte(a, b, loose)

	    case '<':
	      return lt(a, b, loose)

	    case '<=':
	      return lte(a, b, loose)

	    default:
	      throw new TypeError(`Invalid operator: ${op}`)
	  }
	};
	extension_cmp_1 = cmp;
	return extension_cmp_1;
}

var extension_vega_embed_module_comparator;
var extension_hasRequiredComparator;

function extension_requireComparator () {
	if (extension_hasRequiredComparator) return extension_vega_embed_module_comparator;
	extension_hasRequiredComparator = 1;
	const ANY = Symbol('SemVer ANY');
	// hoisted class for cyclic dependency
	class Comparator {
	  static get ANY () {
	    return ANY
	  }

	  constructor (comp, options) {
	    options = parseOptions(options);

	    if (comp instanceof Comparator) {
	      if (comp.loose === !!options.loose) {
	        return comp
	      } else {
	        comp = comp.value;
	      }
	    }

	    comp = comp.trim().split(/\s+/).join(' ');
	    debug('comparator', comp, options);
	    this.options = options;
	    this.loose = !!options.loose;
	    this.parse(comp);

	    if (this.semver === ANY) {
	      this.value = '';
	    } else {
	      this.value = this.operator + this.semver.version;
	    }

	    debug('comp', this);
	  }

	  parse (comp) {
	    const r = this.options.loose ? re[t.COMPARATORLOOSE] : re[t.COMPARATOR];
	    const m = comp.match(r);

	    if (!m) {
	      throw new TypeError(`Invalid comparator: ${comp}`)
	    }

	    this.operator = m[1] !== undefined ? m[1] : '';
	    if (this.operator === '=') {
	      this.operator = '';
	    }

	    // if it literally is just '>' or '' then allow anything.
	    if (!m[2]) {
	      this.semver = ANY;
	    } else {
	      this.semver = new SemVer(m[2], this.options.loose);
	    }
	  }

	  toString () {
	    return this.value
	  }

	  test (version) {
	    debug('Comparator.test', version, this.options.loose);

	    if (this.semver === ANY || version === ANY) {
	      return true
	    }

	    if (typeof version === 'string') {
	      try {
	        version = new SemVer(version, this.options);
	      } catch (er) {
	        return false
	      }
	    }

	    return cmp(version, this.operator, this.semver, this.options)
	  }

	  intersects (comp, options) {
	    if (!(comp instanceof Comparator)) {
	      throw new TypeError('a Comparator is required')
	    }

	    if (this.operator === '') {
	      if (this.value === '') {
	        return true
	      }
	      return new Range(comp.value, options).test(this.value)
	    } else if (comp.operator === '') {
	      if (comp.value === '') {
	        return true
	      }
	      return new Range(this.value, options).test(comp.semver)
	    }

	    options = parseOptions(options);

	    // Special cases where nothing can possibly be lower
	    if (options.includePrerelease &&
	      (this.value === '<0.0.0-0' || comp.value === '<0.0.0-0')) {
	      return false
	    }
	    if (!options.includePrerelease &&
	      (this.value.startsWith('<0.0.0') || comp.value.startsWith('<0.0.0'))) {
	      return false
	    }

	    // Same direction increasing (> or >=)
	    if (this.operator.startsWith('>') && comp.operator.startsWith('>')) {
	      return true
	    }
	    // Same direction decreasing (< or <=)
	    if (this.operator.startsWith('<') && comp.operator.startsWith('<')) {
	      return true
	    }
	    // same SemVer and both sides are inclusive (<= or >=)
	    if (
	      (this.semver.version === comp.semver.version) &&
	      this.operator.includes('=') && comp.operator.includes('=')) {
	      return true
	    }
	    // opposite directions less than
	    if (cmp(this.semver, '<', comp.semver, options) &&
	      this.operator.startsWith('>') && comp.operator.startsWith('<')) {
	      return true
	    }
	    // opposite directions greater than
	    if (cmp(this.semver, '>', comp.semver, options) &&
	      this.operator.startsWith('<') && comp.operator.startsWith('>')) {
	      return true
	    }
	    return false
	  }
	}

	extension_vega_embed_module_comparator = Comparator;

	const parseOptions = extension_requireParseOptions();
	const { safeRe: re, t } = extension_requireRe();
	const cmp = extension_requireCmp();
	const debug = extension_requireDebug();
	const SemVer = extension_requireSemver();
	const Range = extension_requireRange();
	return extension_vega_embed_module_comparator;
}

var extension_vega_embed_module_range;
var extension_hasRequiredRange;

function extension_requireRange () {
	if (extension_hasRequiredRange) return extension_vega_embed_module_range;
	extension_hasRequiredRange = 1;
	const SPACE_CHARACTERS = /\s+/g;

	// hoisted class for cyclic dependency
	class Range {
	  constructor (range, options) {
	    options = parseOptions(options);

	    if (range instanceof Range) {
	      if (
	        range.loose === !!options.loose &&
	        range.includePrerelease === !!options.includePrerelease
	      ) {
	        return range
	      } else {
	        return new Range(range.raw, options)
	      }
	    }

	    if (range instanceof Comparator) {
	      // just put it in the set and return
	      this.raw = range.value;
	      this.set = [[range]];
	      this.formatted = undefined;
	      return this
	    }

	    this.options = options;
	    this.loose = !!options.loose;
	    this.includePrerelease = !!options.includePrerelease;

	    // First reduce all whitespace as much as possible so we do not have to rely
	    // on potentially slow regexes like \s*. This is then stored and used for
	    // future error messages as well.
	    this.raw = range.trim().replace(SPACE_CHARACTERS, ' ');

	    // First, split on ||
	    this.set = this.raw
	      .split('||')
	      // map the range to a 2d array of comparators
	      .map(r => this.parseRange(r.trim()))
	      // throw out any comparator lists that are empty
	      // this generally means that it was not a valid range, which is allowed
	      // in loose mode, but will still throw if the WHOLE range is invalid.
	      .filter(c => c.length);

	    if (!this.set.length) {
	      throw new TypeError(`Invalid SemVer Range: ${this.raw}`)
	    }

	    // if we have any that are not the null set, throw out null sets.
	    if (this.set.length > 1) {
	      // keep the first one, in case they're all null sets
	      const first = this.set[0];
	      this.set = this.set.filter(c => !isNullSet(c[0]));
	      if (this.set.length === 0) {
	        this.set = [first];
	      } else if (this.set.length > 1) {
	        // if we have any that are *, then the range is just *
	        for (const c of this.set) {
	          if (c.length === 1 && isAny(c[0])) {
	            this.set = [c];
	            break
	          }
	        }
	      }
	    }

	    this.formatted = undefined;
	  }

	  get range () {
	    if (this.formatted === undefined) {
	      this.formatted = '';
	      for (let i = 0; i < this.set.length; i++) {
	        if (i > 0) {
	          this.formatted += '||';
	        }
	        const comps = this.set[i];
	        for (let k = 0; k < comps.length; k++) {
	          if (k > 0) {
	            this.formatted += ' ';
	          }
	          this.formatted += comps[k].toString().trim();
	        }
	      }
	    }
	    return this.formatted
	  }

	  format () {
	    return this.range
	  }

	  toString () {
	    return this.range
	  }

	  parseRange (range) {
	    // memoize range parsing for performance.
	    // this is a very hot path, and fully deterministic.
	    const memoOpts =
	      (this.options.includePrerelease && FLAG_INCLUDE_PRERELEASE) |
	      (this.options.loose && FLAG_LOOSE);
	    const memoKey = memoOpts + ':' + range;
	    const cached = cache.get(memoKey);
	    if (cached) {
	      return cached
	    }

	    const loose = this.options.loose;
	    // `1.2.3 - 1.2.4` => `>=1.2.3 <=1.2.4`
	    const hr = loose ? re[t.HYPHENRANGELOOSE] : re[t.HYPHENRANGE];
	    range = range.replace(hr, hyphenReplace(this.options.includePrerelease));
	    debug('hyphen replace', range);

	    // `> 1.2.3 < 1.2.5` => `>1.2.3 <1.2.5`
	    range = range.replace(re[t.COMPARATORTRIM], comparatorTrimReplace);
	    debug('comparator trim', range);

	    // `~ 1.2.3` => `~1.2.3`
	    range = range.replace(re[t.TILDETRIM], tildeTrimReplace);
	    debug('tilde trim', range);

	    // `^ 1.2.3` => `^1.2.3`
	    range = range.replace(re[t.CARETTRIM], caretTrimReplace);
	    debug('caret trim', range);

	    // At this point, the range is completely trimmed and
	    // ready to be split into comparators.

	    let rangeList = range
	      .split(' ')
	      .map(comp => parseComparator(comp, this.options))
	      .join(' ')
	      .split(/\s+/)
	      // >=0.0.0 is equivalent to *
	      .map(comp => replaceGTE0(comp, this.options));

	    if (loose) {
	      // in loose mode, throw out any that are not valid comparators
	      rangeList = rangeList.filter(comp => {
	        debug('loose invalid filter', comp, this.options);
	        return !!comp.match(re[t.COMPARATORLOOSE])
	      });
	    }
	    debug('range list', rangeList);

	    // if any comparators are the null set, then replace with JUST null set
	    // if more than one comparator, remove any * comparators
	    // also, don't include the same comparator more than once
	    const rangeMap = new Map();
	    const comparators = rangeList.map(comp => new Comparator(comp, this.options));
	    for (const comp of comparators) {
	      if (isNullSet(comp)) {
	        return [comp]
	      }
	      rangeMap.set(comp.value, comp);
	    }
	    if (rangeMap.size > 1 && rangeMap.has('')) {
	      rangeMap.delete('');
	    }

	    const result = [...rangeMap.values()];
	    cache.set(memoKey, result);
	    return result
	  }

	  intersects (range, options) {
	    if (!(range instanceof Range)) {
	      throw new TypeError('a Range is required')
	    }

	    return this.set.some((thisComparators) => {
	      return (
	        isSatisfiable(thisComparators, options) &&
	        range.set.some((rangeComparators) => {
	          return (
	            isSatisfiable(rangeComparators, options) &&
	            thisComparators.every((thisComparator) => {
	              return rangeComparators.every((rangeComparator) => {
	                return thisComparator.intersects(rangeComparator, options)
	              })
	            })
	          )
	        })
	      )
	    })
	  }

	  // if ANY of the sets match ALL of its comparators, then pass
	  test (version) {
	    if (!version) {
	      return false
	    }

	    if (typeof version === 'string') {
	      try {
	        version = new SemVer(version, this.options);
	      } catch (er) {
	        return false
	      }
	    }

	    for (let i = 0; i < this.set.length; i++) {
	      if (testSet(this.set[i], version, this.options)) {
	        return true
	      }
	    }
	    return false
	  }
	}

	extension_vega_embed_module_range = Range;

	const LRU = extension_requireLrucache();
	const cache = new LRU();

	const parseOptions = extension_requireParseOptions();
	const Comparator = extension_requireComparator();
	const debug = extension_requireDebug();
	const SemVer = extension_requireSemver();
	const {
	  safeRe: re,
	  t,
	  comparatorTrimReplace,
	  tildeTrimReplace,
	  caretTrimReplace,
	} = extension_requireRe();
	const { FLAG_INCLUDE_PRERELEASE, FLAG_LOOSE } = extension_requireConstants();

	const isNullSet = c => c.value === '<0.0.0-0';
	const isAny = c => c.value === '';

	// take a set of comparators and determine whether there
	// exists a version which can satisfy it
	const isSatisfiable = (comparators, options) => {
	  let result = true;
	  const remainingComparators = comparators.slice();
	  let testComparator = remainingComparators.pop();

	  while (result && remainingComparators.length) {
	    result = remainingComparators.every((otherComparator) => {
	      return testComparator.intersects(otherComparator, options)
	    });

	    testComparator = remainingComparators.pop();
	  }

	  return result
	};

	// comprised of xranges, tildes, stars, and gtlt's at this point.
	// already replaced the hyphen ranges
	// turn into a set of JUST comparators.
	const parseComparator = (comp, options) => {
	  debug('comp', comp, options);
	  comp = replaceCarets(comp, options);
	  debug('caret', comp);
	  comp = replaceTildes(comp, options);
	  debug('tildes', comp);
	  comp = replaceXRanges(comp, options);
	  debug('xrange', comp);
	  comp = replaceStars(comp, options);
	  debug('stars', comp);
	  return comp
	};

	const isX = id => !id || id.toLowerCase() === 'x' || id === '*';

	// ~, ~> --> * (any, kinda silly)
	// ~2, ~2.x, ~2.x.x, ~>2, ~>2.x ~>2.x.x --> >=2.0.0 <3.0.0-0
	// ~2.0, ~2.0.x, ~>2.0, ~>2.0.x --> >=2.0.0 <2.1.0-0
	// ~1.2, ~1.2.x, ~>1.2, ~>1.2.x --> >=1.2.0 <1.3.0-0
	// ~1.2.3, ~>1.2.3 --> >=1.2.3 <1.3.0-0
	// ~1.2.0, ~>1.2.0 --> >=1.2.0 <1.3.0-0
	// ~0.0.1 --> >=0.0.1 <0.1.0-0
	const replaceTildes = (comp, options) => {
	  return comp
	    .trim()
	    .split(/\s+/)
	    .map((c) => replaceTilde(c, options))
	    .join(' ')
	};

	const replaceTilde = (comp, options) => {
	  const r = options.loose ? re[t.TILDELOOSE] : re[t.TILDE];
	  return comp.replace(r, (_, M, m, p, pr) => {
	    debug('tilde', comp, _, M, m, p, pr);
	    let ret;

	    if (isX(M)) {
	      ret = '';
	    } else if (isX(m)) {
	      ret = `>=${M}.0.0 <${+M + 1}.0.0-0`;
	    } else if (isX(p)) {
	      // ~1.2 == >=1.2.0 <1.3.0-0
	      ret = `>=${M}.${m}.0 <${M}.${+m + 1}.0-0`;
	    } else if (pr) {
	      debug('replaceTilde pr', pr);
	      ret = `>=${M}.${m}.${p}-${pr
	      } <${M}.${+m + 1}.0-0`;
	    } else {
	      // ~1.2.3 == >=1.2.3 <1.3.0-0
	      ret = `>=${M}.${m}.${p
	      } <${M}.${+m + 1}.0-0`;
	    }

	    debug('tilde return', ret);
	    return ret
	  })
	};

	// ^ --> * (any, kinda silly)
	// ^2, ^2.x, ^2.x.x --> >=2.0.0 <3.0.0-0
	// ^2.0, ^2.0.x --> >=2.0.0 <3.0.0-0
	// ^1.2, ^1.2.x --> >=1.2.0 <2.0.0-0
	// ^1.2.3 --> >=1.2.3 <2.0.0-0
	// ^1.2.0 --> >=1.2.0 <2.0.0-0
	// ^0.0.1 --> >=0.0.1 <0.0.2-0
	// ^0.1.0 --> >=0.1.0 <0.2.0-0
	const replaceCarets = (comp, options) => {
	  return comp
	    .trim()
	    .split(/\s+/)
	    .map((c) => replaceCaret(c, options))
	    .join(' ')
	};

	const replaceCaret = (comp, options) => {
	  debug('caret', comp, options);
	  const r = options.loose ? re[t.CARETLOOSE] : re[t.CARET];
	  const z = options.includePrerelease ? '-0' : '';
	  return comp.replace(r, (_, M, m, p, pr) => {
	    debug('caret', comp, _, M, m, p, pr);
	    let ret;

	    if (isX(M)) {
	      ret = '';
	    } else if (isX(m)) {
	      ret = `>=${M}.0.0${z} <${+M + 1}.0.0-0`;
	    } else if (isX(p)) {
	      if (M === '0') {
	        ret = `>=${M}.${m}.0${z} <${M}.${+m + 1}.0-0`;
	      } else {
	        ret = `>=${M}.${m}.0${z} <${+M + 1}.0.0-0`;
	      }
	    } else if (pr) {
	      debug('replaceCaret pr', pr);
	      if (M === '0') {
	        if (m === '0') {
	          ret = `>=${M}.${m}.${p}-${pr
	          } <${M}.${m}.${+p + 1}-0`;
	        } else {
	          ret = `>=${M}.${m}.${p}-${pr
	          } <${M}.${+m + 1}.0-0`;
	        }
	      } else {
	        ret = `>=${M}.${m}.${p}-${pr
	        } <${+M + 1}.0.0-0`;
	      }
	    } else {
	      debug('no pr');
	      if (M === '0') {
	        if (m === '0') {
	          ret = `>=${M}.${m}.${p
	          }${z} <${M}.${m}.${+p + 1}-0`;
	        } else {
	          ret = `>=${M}.${m}.${p
	          }${z} <${M}.${+m + 1}.0-0`;
	        }
	      } else {
	        ret = `>=${M}.${m}.${p
	        } <${+M + 1}.0.0-0`;
	      }
	    }

	    debug('caret return', ret);
	    return ret
	  })
	};

	const replaceXRanges = (comp, options) => {
	  debug('replaceXRanges', comp, options);
	  return comp
	    .split(/\s+/)
	    .map((c) => replaceXRange(c, options))
	    .join(' ')
	};

	const replaceXRange = (comp, options) => {
	  comp = comp.trim();
	  const r = options.loose ? re[t.XRANGELOOSE] : re[t.XRANGE];
	  return comp.replace(r, (ret, gtlt, M, m, p, pr) => {
	    debug('xRange', comp, ret, gtlt, M, m, p, pr);
	    const xM = isX(M);
	    const xm = xM || isX(m);
	    const xp = xm || isX(p);
	    const anyX = xp;

	    if (gtlt === '=' && anyX) {
	      gtlt = '';
	    }

	    // if we're including prereleases in the match, then we need
	    // to fix this to -0, the lowest possible prerelease value
	    pr = options.includePrerelease ? '-0' : '';

	    if (xM) {
	      if (gtlt === '>' || gtlt === '<') {
	        // nothing is allowed
	        ret = '<0.0.0-0';
	      } else {
	        // nothing is forbidden
	        ret = '*';
	      }
	    } else if (gtlt && anyX) {
	      // we know patch is an x, because we have any x at all.
	      // replace X with 0
	      if (xm) {
	        m = 0;
	      }
	      p = 0;

	      if (gtlt === '>') {
	        // >1 => >=2.0.0
	        // >1.2 => >=1.3.0
	        gtlt = '>=';
	        if (xm) {
	          M = +M + 1;
	          m = 0;
	          p = 0;
	        } else {
	          m = +m + 1;
	          p = 0;
	        }
	      } else if (gtlt === '<=') {
	        // <=0.7.x is actually <0.8.0, since any 0.7.x should
	        // pass.  Similarly, <=7.x is actually <8.0.0, etc.
	        gtlt = '<';
	        if (xm) {
	          M = +M + 1;
	        } else {
	          m = +m + 1;
	        }
	      }

	      if (gtlt === '<') {
	        pr = '-0';
	      }

	      ret = `${gtlt + M}.${m}.${p}${pr}`;
	    } else if (xm) {
	      ret = `>=${M}.0.0${pr} <${+M + 1}.0.0-0`;
	    } else if (xp) {
	      ret = `>=${M}.${m}.0${pr
	      } <${M}.${+m + 1}.0-0`;
	    }

	    debug('xRange return', ret);

	    return ret
	  })
	};

	// Because * is AND-ed with everything else in the comparator,
	// and '' means "any version", just remove the *s entirely.
	const replaceStars = (comp, options) => {
	  debug('replaceStars', comp, options);
	  // Looseness is ignored here.  star is always as loose as it gets!
	  return comp
	    .trim()
	    .replace(re[t.STAR], '')
	};

	const replaceGTE0 = (comp, options) => {
	  debug('replaceGTE0', comp, options);
	  return comp
	    .trim()
	    .replace(re[options.includePrerelease ? t.GTE0PRE : t.GTE0], '')
	};

	// This function is passed to string.replace(re[t.HYPHENRANGE])
	// M, m, patch, prerelease, build
	// 1.2 - 3.4.5 => >=1.2.0 <=3.4.5
	// 1.2.3 - 3.4 => >=1.2.0 <3.5.0-0 Any 3.4.x will do
	// 1.2 - 3.4 => >=1.2.0 <3.5.0-0
	// TODO build?
	const hyphenReplace = incPr => ($0,
	  from, fM, fm, fp, fpr, fb,
	  to, tM, tm, tp, tpr) => {
	  if (isX(fM)) {
	    from = '';
	  } else if (isX(fm)) {
	    from = `>=${fM}.0.0${incPr ? '-0' : ''}`;
	  } else if (isX(fp)) {
	    from = `>=${fM}.${fm}.0${incPr ? '-0' : ''}`;
	  } else if (fpr) {
	    from = `>=${from}`;
	  } else {
	    from = `>=${from}${incPr ? '-0' : ''}`;
	  }

	  if (isX(tM)) {
	    to = '';
	  } else if (isX(tm)) {
	    to = `<${+tM + 1}.0.0-0`;
	  } else if (isX(tp)) {
	    to = `<${tM}.${+tm + 1}.0-0`;
	  } else if (tpr) {
	    to = `<=${tM}.${tm}.${tp}-${tpr}`;
	  } else if (incPr) {
	    to = `<${tM}.${tm}.${+tp + 1}-0`;
	  } else {
	    to = `<=${to}`;
	  }

	  return `${from} ${to}`.trim()
	};

	const testSet = (set, version, options) => {
	  for (let i = 0; i < set.length; i++) {
	    if (!set[i].test(version)) {
	      return false
	    }
	  }

	  if (version.prerelease.length && !options.includePrerelease) {
	    // Find the set of versions that are allowed to have prereleases
	    // For example, ^1.2.3-pr.1 desugars to >=1.2.3-pr.1 <2.0.0
	    // That should allow `1.2.3-pr.2` to pass.
	    // However, `1.2.4-alpha.notready` should NOT be allowed,
	    // even though it's within the range set by the comparators.
	    for (let i = 0; i < set.length; i++) {
	      debug(set[i].semver);
	      if (set[i].semver === Comparator.ANY) {
	        continue
	      }

	      if (set[i].semver.prerelease.length > 0) {
	        const allowed = set[i].semver;
	        if (allowed.major === version.major &&
	            allowed.minor === version.minor &&
	            allowed.patch === version.patch) {
	          return true
	        }
	      }
	    }

	    // Version has a -pre, but it's not one of the ones we like.
	    return false
	  }

	  return true
	};
	return extension_vega_embed_module_range;
}

var extension_satisfies_1;
var extension_hasRequiredSatisfies;

function extension_requireSatisfies () {
	if (extension_hasRequiredSatisfies) return extension_satisfies_1;
	extension_hasRequiredSatisfies = 1;
	const Range = extension_requireRange();
	const satisfies = (version, range, options) => {
	  try {
	    range = new Range(range, options);
	  } catch (er) {
	    return false
	  }
	  return range.test(version)
	};
	extension_satisfies_1 = satisfies;
	return extension_satisfies_1;
}

var extension_satisfiesExports = extension_requireSatisfies();
var extension_satisfies = /*@__PURE__*/extension_getDefaultExportFromCjs(extension_satisfiesExports);

/**
 * Open editor url in a new window, and pass a message.
 */
function extension_post (window, url, data) {
    const editor = window.open(url);
    const wait = 10000;
    const step = 250;
    const { origin } = new URL(url);
    let count = ~~(wait / step);
    function listen(evt) {
        if (evt.source === editor) {
            count = 0;
            window.removeEventListener('message', listen, false);
        }
    }
    window.addEventListener('message', listen, false);
    // send message
    // periodically resend until ack received or timeout
    function send() {
        if (count <= 0) {
            return;
        }
        editor.postMessage(data, origin);
        setTimeout(send, step);
        count -= 1;
    }
    setTimeout(send, step);
}

// generated with build-style.sh
var extension_embedStyle = `.vega-embed {
  position: relative;
  display: inline-block;
  box-sizing: border-box;
}
.vega-embed.has-actions {
  padding-right: 38px;
}
.vega-embed details:not([open]) > :not(summary) {
  display: none !important;
}
.vega-embed summary {
  list-style: none;
  position: absolute;
  top: 0;
  right: 0;
  padding: 6px;
  z-index: 1000;
  background: white;
  box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
  color: #1b1e23;
  border: 1px solid #aaa;
  border-radius: 999px;
  opacity: 0.2;
  transition: opacity 0.4s ease-in;
  cursor: pointer;
  line-height: 0px;
}
.vega-embed summary::-webkit-details-marker {
  display: none;
}
.vega-embed summary:active {
  box-shadow: #aaa 0px 0px 0px 1px inset;
}
.vega-embed summary svg {
  width: 14px;
  height: 14px;
}
.vega-embed details[open] summary {
  opacity: 0.7;
}
.vega-embed:hover summary, .vega-embed:focus-within summary {
  opacity: 1 !important;
  transition: opacity 0.2s ease;
}
.vega-embed .vega-actions {
  position: absolute;
  z-index: 1001;
  top: 35px;
  right: -9px;
  display: flex;
  flex-direction: column;
  padding-bottom: 8px;
  padding-top: 8px;
  border-radius: 4px;
  box-shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.2);
  border: 1px solid #d9d9d9;
  background: white;
  animation-duration: 0.15s;
  animation-name: scale-in;
  animation-timing-function: cubic-bezier(0.2, 0, 0.13, 1.5);
  text-align: left;
}
.vega-embed .vega-actions a {
  padding: 8px 16px;
  font-family: sans-serif;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  color: #434a56;
  text-decoration: none;
}
.vega-embed .vega-actions a:hover, .vega-embed .vega-actions a:focus {
  background-color: #f7f7f9;
  color: black;
}
.vega-embed .vega-actions::before, .vega-embed .vega-actions::after {
  content: "";
  display: inline-block;
  position: absolute;
}
.vega-embed .vega-actions::before {
  left: auto;
  right: 14px;
  top: -16px;
  border: 8px solid rgba(0, 0, 0, 0);
  border-bottom-color: #d9d9d9;
}
.vega-embed .vega-actions::after {
  left: auto;
  right: 15px;
  top: -14px;
  border: 7px solid rgba(0, 0, 0, 0);
  border-bottom-color: #fff;
}
.vega-embed .chart-wrapper.fit-x {
  width: 100%;
}
.vega-embed .chart-wrapper.fit-y {
  height: 100%;
}

.vega-embed-wrapper {
  max-width: 100%;
  overflow: auto;
  padding-right: 14px;
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.6);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}
`;

function extension_vega_embed_module_mergeDeep(dest, ...src) {
    for (const s of src) {
        extension_vega_embed_module_deepMerge_(dest, s);
    }
    return dest;
}
function extension_vega_embed_module_deepMerge_(dest, src) {
    for (const property of Object.keys(src)) {
        extension_writeConfig(dest, property, src[property], true);
    }
}

var extension_vega_embed_module_name = "vega-embed";
var extension_vega_embed_module_version$1 = "6.29.0";
var extension_vega_embed_module_description = "Publish Vega visualizations as embedded web components.";
var extension_vega_embed_module_keywords = [
	"vega",
	"data",
	"visualization",
	"component",
	"embed"
];
var extension_vega_embed_module_repository = {
	type: "git",
	url: "http://github.com/vega/vega-embed.git"
};
var extension_vega_embed_module_author = {
	name: "UW Interactive Data Lab",
	url: "http://idl.cs.washington.edu"
};
var extension_vega_embed_module_contributors = [
	{
		name: "Dominik Moritz",
		url: "https://www.domoritz.de"
	}
];
var extension_vega_embed_module_bugs = {
	url: "https://github.com/vega/vega-embed/issues"
};
var extension_vega_embed_module_homepage = "https://github.com/vega/vega-embed#readme";
var extension_vega_embed_module_license = "BSD-3-Clause";
var extension_vega_embed_module_main = "build/vega-embed.js";
var extension_vega_embed_module_module = "build/vega-embed.module.js";
var extension_vega_embed_module_unpkg = "build/vega-embed.min.js";
var extension_vega_embed_module_jsdelivr = "build/vega-embed.min.js";
var extension_vega_embed_module_types = "build/src/embed.d.ts";
var extension_vega_embed_module_files = [
	"src",
	"build"
];
var extension_vega_embed_module_exports = {
	".": {
		"import": {
			types: "./build/src/embed.d.ts",
			"default": "./build/vega-embed.module.js"
		},
		require: {
			"default": "./build/vega-embed.js"
		}
	}
};
var extension_vega_embed_module_devDependencies = {
	"@babel/core": "^7.26.0",
	"@babel/eslint-parser": "^7.25.9",
	"@babel/plugin-syntax-dynamic-import": "^7.8.3",
	"@babel/plugin-transform-runtime": "^7.25.9",
	"@babel/preset-env": "^7.26.0",
	"@babel/preset-typescript": "^7.26.0",
	"@release-it/conventional-changelog": "^9.0.3",
	"@rollup/plugin-commonjs": "28.0.1",
	"@rollup/plugin-json": "^6.1.0",
	"@rollup/plugin-node-resolve": "^15.3.0",
	"@rollup/plugin-terser": "^0.4.4",
	"@rollup/plugin-typescript": "^12.1.1",
	"@types/semver": "^7.5.8",
	"@typescript-eslint/parser": "^8.15.0",
	"@vitest/coverage-istanbul": "^2.1.5",
	"browser-sync": "^3.0.3",
	concurrently: "^9.1.0",
	"del-cli": "^6.0.0",
	"eslint-config-prettier": "^9.1.0",
	"eslint-plugin-prettier": "^5.2.1",
	"eslint-plugin-vitest": "^0.5.4",
	eslint: "^9.15.0",
	jsdom: "^25.0.1",
	"postinstall-postinstall": "^2.1.0",
	prettier: "^3.3.3",
	"release-it": "^17.10.0",
	"rollup-plugin-bundle-size": "^1.0.3",
	rollup: "4.27.3",
	sass: "^1.81.0",
	"typescript-eslint": "^8.15.0",
	typescript: "^5.6.3",
	"vega-lite": "^5.21.0",
	vega: "^5.30.0",
	"vitest-canvas-mock": "^0.3.3",
	vitest: "^2.1.5"
};
var extension_vega_embed_module_peerDependencies = {
	vega: "^5.21.0",
	"vega-lite": "*"
};
var extension_vega_embed_module_dependencies = {
	"fast-json-patch": "^3.1.1",
	"json-stringify-pretty-compact": "^4.0.0",
	semver: "^7.6.3",
	tslib: "^2.8.1",
	"vega-interpreter": "^1.0.5",
	"vega-schema-url-parser": "^2.2.0",
	"vega-themes": "^2.15.0",
	"vega-tooltip": "^0.35.2"
};
var extension_vega_embed_module_scripts = {
	prebuild: "npm run clean && npm run build:style",
	build: "rollup -c",
	"build:style": "./build-style.sh",
	clean: "del-cli build src/style.ts",
	prepublishOnly: "npm run clean && npm run build",
	preversion: "npm run lint && npm run test",
	serve: "browser-sync start --directory -s -f build *.html",
	start: "npm run build && concurrently --kill-others -n Server,Rollup 'npm run serve' 'rollup -c -w'",
	pretest: "npm run build:style",
	test: "vitest run",
	prettierbase: "prettier '*.{css,scss,html}'",
	format: "eslint . --fix && npm run prettierbase -- --write",
	lint: "eslint . && npm run prettierbase -- --check",
	release: "release-it"
};
var extension_vega_embed_module_pkg = {
	name: extension_vega_embed_module_name,
	version: extension_vega_embed_module_version$1,
	description: extension_vega_embed_module_description,
	keywords: extension_vega_embed_module_keywords,
	repository: extension_vega_embed_module_repository,
	author: extension_vega_embed_module_author,
	contributors: extension_vega_embed_module_contributors,
	bugs: extension_vega_embed_module_bugs,
	homepage: extension_vega_embed_module_homepage,
	license: extension_vega_embed_module_license,
	main: extension_vega_embed_module_main,
	module: extension_vega_embed_module_module,
	unpkg: extension_vega_embed_module_unpkg,
	jsdelivr: extension_vega_embed_module_jsdelivr,
	types: extension_vega_embed_module_types,
	files: extension_vega_embed_module_files,
	exports: extension_vega_embed_module_exports,
	devDependencies: extension_vega_embed_module_devDependencies,
	peerDependencies: extension_vega_embed_module_peerDependencies,
	dependencies: extension_vega_embed_module_dependencies,
	scripts: extension_vega_embed_module_scripts
};

const extension_vega_embed_module_version = extension_vega_embed_module_pkg.version;
const extension_vega = extension_vega_module_namespaceObject;
let extension_vegaLite = extension_build_src_namespaceObject;
// For backwards compatibility with Vega-Lite before v4.
const extension_vega_embed_module_w = (typeof window !== 'undefined' ? window : undefined);
if (extension_vegaLite === undefined && extension_vega_embed_module_w?.vl?.compile) {
    extension_vegaLite = extension_vega_embed_module_w.vl;
}
const extension_DEFAULT_ACTIONS = { export: { svg: true, png: true }, source: true, compiled: true, editor: true };
const extension_I18N = {
    CLICK_TO_VIEW_ACTIONS: 'Click to view actions',
    COMPILED_ACTION: 'View Compiled Vega',
    EDITOR_ACTION: 'Open in Vega Editor',
    PNG_ACTION: 'Save as PNG',
    SOURCE_ACTION: 'View Source',
    SVG_ACTION: 'Save as SVG',
};
const extension_NAMES = {
    vega: 'Vega',
    'vega-lite': 'Vega-Lite',
};
const extension_VERSION = {
    vega: extension_vega.version,
    'vega-lite': extension_vegaLite ? extension_vegaLite.version : 'not available',
};
const extension_PREPROCESSOR = {
    vega: (vgSpec) => vgSpec,
    'vega-lite': (vlSpec, config) => extension_vegaLite.compile(vlSpec, { config: config }).spec,
};
const extension_SVG_CIRCLES = `
<svg viewBox="0 0 16 16" fill="currentColor" stroke="none" stroke-width="1" stroke-linecap="round" stroke-linejoin="round">
  <circle r="2" cy="8" cx="2"></circle>
  <circle r="2" cy="8" cx="8"></circle>
  <circle r="2" cy="8" cx="14"></circle>
</svg>`;
const extension_CHART_WRAPPER_CLASS = 'chart-wrapper';
function extension_isTooltipHandler(h) {
    return typeof h === 'function';
}
function extension_viewSource(source, sourceHeader, sourceFooter, mode) {
    const header = `<html><head>${sourceHeader}</head><body><pre><code class="json">`;
    const footer = `</code></pre>${sourceFooter}</body></html>`;
    const win = window.open('');
    win.document.write(header + source + footer);
    win.document.title = `${extension_NAMES[mode]} JSON Source`;
}
/**
 * Try to guess the type of spec.
 *
 * @param spec Vega or Vega-Lite spec.
 */
function extension_guessMode(spec, providedMode) {
    // Decide mode
    if (spec.$schema) {
        const parsed = extension_parser_module(spec.$schema);
        if (providedMode && providedMode !== parsed.library) {
            console.warn(`The given visualization spec is written in ${extension_NAMES[parsed.library]}, but mode argument sets ${extension_NAMES[providedMode] ?? providedMode}.`);
        }
        const mode = parsed.library;
        if (!extension_satisfies(extension_VERSION[mode], `^${parsed.version.slice(1)}`)) {
            console.warn(`The input spec uses ${extension_NAMES[mode]} ${parsed.version}, but the current version of ${extension_NAMES[mode]} is v${extension_VERSION[mode]}.`);
        }
        return mode;
    }
    // try to guess from the provided spec
    if ('mark' in spec ||
        'encoding' in spec ||
        'layer' in spec ||
        'hconcat' in spec ||
        'vconcat' in spec ||
        'facet' in spec ||
        'repeat' in spec) {
        return 'vega-lite';
    }
    if ('marks' in spec || 'signals' in spec || 'scales' in spec || 'axes' in spec) {
        return 'vega';
    }
    return providedMode ?? 'vega';
}
function extension_isLoader(o) {
    return !!(o && 'load' in o);
}
function extension_createLoader(opts) {
    return extension_isLoader(opts) ? opts : extension_vega.loader(opts);
}
function extension_embedOptionsFromUsermeta(parsedSpec) {
    const opts = parsedSpec.usermeta?.embedOptions ?? {};
    if (extension_vega_util_module_isString(opts.defaultStyle)) {
        // we don't allow styles set via usermeta since it would allow injection of logic (we set the style via innerHTML)
        opts.defaultStyle = false;
    }
    return opts;
}
/**
 * Embed a Vega visualization component in a web page. This function returns a promise.
 *
 * @param el        DOM element in which to place component (DOM node or CSS selector).
 * @param spec      String : A URL string from which to load the Vega specification.
 *                  Object : The Vega/Vega-Lite specification as a parsed JSON object.
 * @param opts       A JavaScript object containing options for embedding.
 */
async function extension_vega_embed_module_embed(el, spec, opts = {}) {
    let parsedSpec;
    let loader;
    if (extension_vega_util_module_isString(spec)) {
        loader = extension_createLoader(opts.loader);
        parsedSpec = JSON.parse(await loader.load(spec));
    }
    else {
        parsedSpec = spec;
    }
    const loadedEmbedOptions = extension_embedOptionsFromUsermeta(parsedSpec);
    const usermetaLoader = loadedEmbedOptions.loader;
    // either create the loader for the first time or create a new loader if the spec has new loader options
    if (!loader || usermetaLoader) {
        loader = extension_createLoader(opts.loader ?? usermetaLoader);
    }
    const usermetaOpts = await extension_loadOpts(loadedEmbedOptions, loader);
    const parsedOpts = await extension_loadOpts(opts, loader);
    const mergedOpts = {
        ...extension_vega_embed_module_mergeDeep(parsedOpts, usermetaOpts),
        config: extension_mergeConfig(parsedOpts.config ?? {}, usermetaOpts.config ?? {}),
    };
    return await extension_embed(el, parsedSpec, mergedOpts, loader);
}
async function extension_loadOpts(opt, loader) {
    const config = extension_vega_util_module_isString(opt.config) ? JSON.parse(await loader.load(opt.config)) : (opt.config ?? {});
    const patch = extension_vega_util_module_isString(opt.patch) ? JSON.parse(await loader.load(opt.patch)) : opt.patch;
    return {
        ...opt,
        ...(patch ? { patch } : {}),
        ...(config ? { config } : {}),
    };
}
function extension_getRoot(el) {
    const possibleRoot = el.getRootNode ? el.getRootNode() : document;
    return possibleRoot instanceof ShadowRoot
        ? { root: possibleRoot, rootContainer: possibleRoot }
        : { root: document, rootContainer: document.head ?? document.body };
}
async function extension_embed(el, spec, opts = {}, loader) {
    const config = opts.theme ? extension_mergeConfig(extension_vega_themes_module_namespaceObject[opts.theme], opts.config ?? {}) : opts.config;
    const actions = extension_vega_util_module_isBoolean(opts.actions) ? opts.actions : extension_vega_embed_module_mergeDeep({}, extension_DEFAULT_ACTIONS, opts.actions ?? {});
    const i18n = { ...extension_I18N, ...opts.i18n };
    const renderer = opts.renderer ?? 'canvas';
    const logLevel = opts.logLevel ?? extension_vega.Warn;
    const downloadFileName = opts.downloadFileName ?? 'visualization';
    const element = typeof el === 'string' ? document.querySelector(el) : el;
    if (!element) {
        throw new Error(`${el} does not exist`);
    }
    if (opts.defaultStyle !== false) {
        const ID = 'vega-embed-style';
        const { root, rootContainer } = extension_getRoot(element);
        if (!root.getElementById(ID)) {
            const style = document.createElement('style');
            style.id = ID;
            style.innerHTML =
                opts.defaultStyle === undefined || opts.defaultStyle === true
                    ? (extension_embedStyle).toString()
                    : opts.defaultStyle;
            rootContainer.appendChild(style);
        }
    }
    const mode = extension_guessMode(spec, opts.mode);
    let vgSpec = extension_PREPROCESSOR[mode](spec, config);
    if (mode === 'vega-lite') {
        if (vgSpec.$schema) {
            const parsed = extension_parser_module(vgSpec.$schema);
            if (!extension_satisfies(extension_VERSION.vega, `^${parsed.version.slice(1)}`)) {
                console.warn(`The compiled spec uses Vega ${parsed.version}, but current version is v${extension_VERSION.vega}.`);
            }
        }
    }
    element.classList.add('vega-embed');
    if (actions) {
        element.classList.add('has-actions');
    }
    element.innerHTML = ''; // clear container
    let container = element;
    if (actions) {
        const chartWrapper = document.createElement('div');
        chartWrapper.classList.add(extension_CHART_WRAPPER_CLASS);
        element.appendChild(chartWrapper);
        container = chartWrapper;
    }
    const patch = opts.patch;
    if (patch) {
        vgSpec = patch instanceof Function ? patch(vgSpec) : extension_applyPatch(vgSpec, patch, true, false).newDocument;
    }
    // Set locale. Note that this is a global setting.
    if (opts.formatLocale) {
        extension_vega.formatLocale(opts.formatLocale);
    }
    if (opts.timeFormatLocale) {
        extension_vega.timeFormatLocale(opts.timeFormatLocale);
    }
    // Set custom expression functions
    if (opts.expressionFunctions) {
        for (const name in opts.expressionFunctions) {
            const expressionFunction = opts.expressionFunctions[name];
            if ('fn' in expressionFunction) {
                extension_vega.expressionFunction(name, expressionFunction.fn, expressionFunction['visitor']);
            }
            else if (expressionFunction instanceof Function) {
                extension_vega.expressionFunction(name, expressionFunction);
            }
        }
    }
    const { ast } = opts;
    // Do not apply the config to Vega when we have already applied it to Vega-Lite.
    // This call may throw an Error if parsing fails.
    const runtime = extension_vega.parse(vgSpec, mode === 'vega-lite' ? {} : config, { ast });
    const view = new (opts.viewClass || extension_vega.View)(runtime, {
        loader,
        logLevel,
        renderer,
        ...(ast ? { expr: extension_vega.expressionInterpreter ?? opts.expr ?? extension_vega_interpreter_module_expression } : {}),
    });
    view.addSignalListener('autosize', (_, autosize) => {
        const { type } = autosize;
        if (type == 'fit-x') {
            container.classList.add('fit-x');
            container.classList.remove('fit-y');
        }
        else if (type == 'fit-y') {
            container.classList.remove('fit-x');
            container.classList.add('fit-y');
        }
        else if (type == 'fit') {
            container.classList.add('fit-x', 'fit-y');
        }
        else {
            container.classList.remove('fit-x', 'fit-y');
        }
    });
    if (opts.tooltip !== false) {
        const { loader: loader_, tooltip } = opts;
        const baseURL = loader_ && !extension_isLoader(loader_) ? loader_?.baseURL : undefined;
        const handler = extension_isTooltipHandler(tooltip)
            ? tooltip
            : // user provided boolean true or tooltip options
                new extension_vega_tooltip_module_Handler({ baseURL, ...(tooltip === true ? {} : tooltip) }).call;
        view.tooltip(handler);
    }
    let { hover } = opts;
    if (hover === undefined) {
        hover = mode === 'vega';
    }
    if (hover) {
        const { hoverSet, updateSet } = (typeof hover === 'boolean' ? {} : hover);
        view.hover(hoverSet, updateSet);
    }
    if (opts) {
        if (opts.width != null) {
            view.width(opts.width);
        }
        if (opts.height != null) {
            view.height(opts.height);
        }
        if (opts.padding != null) {
            view.padding(opts.padding);
        }
    }
    await view.initialize(container, opts.bind).runAsync();
    let documentClickHandler;
    if (actions !== false) {
        let wrapper = element;
        if (opts.defaultStyle !== false || opts.forceActionsMenu) {
            const details = document.createElement('details');
            details.title = i18n.CLICK_TO_VIEW_ACTIONS;
            element.append(details);
            wrapper = details;
            const summary = document.createElement('summary');
            summary.innerHTML = extension_SVG_CIRCLES;
            details.append(summary);
            documentClickHandler = (ev) => {
                if (!details.contains(ev.target)) {
                    details.removeAttribute('open');
                }
            };
            document.addEventListener('click', documentClickHandler);
        }
        const ctrl = document.createElement('div');
        wrapper.append(ctrl);
        ctrl.classList.add('vega-actions');
        // add 'Export' action
        if (actions === true || actions.export !== false) {
            for (const ext of ['svg', 'png']) {
                if (actions === true || actions.export === true || actions.export[ext]) {
                    const i18nExportAction = i18n[`${ext.toUpperCase()}_ACTION`];
                    const exportLink = document.createElement('a');
                    const scaleFactor = extension_vega_util_module_isObject(opts.scaleFactor) ? opts.scaleFactor[ext] : opts.scaleFactor;
                    exportLink.text = i18nExportAction;
                    exportLink.href = '#';
                    exportLink.target = '_blank';
                    exportLink.download = `${downloadFileName}.${ext}`;
                    // add link on mousedown so that it's correct when the click happens
                    exportLink.addEventListener('mousedown', async function (e) {
                        e.preventDefault();
                        const url = await view.toImageURL(ext, scaleFactor);
                        this.href = url;
                    });
                    ctrl.append(exportLink);
                }
            }
        }
        // add 'View Source' action
        if (actions === true || actions.source !== false) {
            const viewSourceLink = document.createElement('a');
            viewSourceLink.text = i18n.SOURCE_ACTION;
            viewSourceLink.href = '#';
            viewSourceLink.addEventListener('click', function (e) {
                extension_viewSource(extension_stringify(spec), opts.sourceHeader ?? '', opts.sourceFooter ?? '', mode);
                e.preventDefault();
            });
            ctrl.append(viewSourceLink);
        }
        // add 'View Compiled' action
        if (mode === 'vega-lite' && (actions === true || actions.compiled !== false)) {
            const compileLink = document.createElement('a');
            compileLink.text = i18n.COMPILED_ACTION;
            compileLink.href = '#';
            compileLink.addEventListener('click', function (e) {
                extension_viewSource(extension_stringify(vgSpec), opts.sourceHeader ?? '', opts.sourceFooter ?? '', 'vega');
                e.preventDefault();
            });
            ctrl.append(compileLink);
        }
        // add 'Open in Vega Editor' action
        if (actions === true || actions.editor !== false) {
            const editorUrl = opts.editorUrl ?? 'https://vega.github.io/editor/';
            const editorLink = document.createElement('a');
            editorLink.text = i18n.EDITOR_ACTION;
            editorLink.href = '#';
            editorLink.addEventListener('click', function (e) {
                extension_post(window, editorUrl, {
                    config: config,
                    mode: patch ? 'vega' : mode,
                    renderer,
                    spec: extension_stringify(patch ? vgSpec : spec),
                });
                e.preventDefault();
            });
            ctrl.append(editorLink);
        }
    }
    function finalize() {
        if (documentClickHandler) {
            document.removeEventListener('click', documentClickHandler);
        }
        view.finalize();
    }
    return { view, spec, vgSpec, finalize, embedOptions: opts };
}


//# sourceMappingURL=vega-embed.module.js.map

;// ../../node_modules/svelte-vega/dist/constants.js
const extension_WIDTH_HEIGHT = new Set(["width", "height"]);
//# sourceMappingURL=constants.js.map
// EXTERNAL MODULE: ../../node_modules/fast-deep-equal/index.js
var extension_fast_deep_equal = __webpack_require__(8792);
;// ../../node_modules/svelte-vega/dist/utils.js


function extension_updateMultipleDatasetsInView(view, data) {
    for (const [name, value] of Object.entries(data)) {
        const getType = {};
        if (value) {
            if (!!value && getType.toString.call(value) === "[object Function]") {
                const parsedValue = value;
                parsedValue(view.data(name));
            }
            else {
                view.change(name, extension_vega
                    .changeset()
                    .remove(() => true)
                    .insert(value));
            }
        }
    }
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function extension_shallowEqual(a = {}, b = {}, ignore = new Set()) {
    const aKeys = Object.keys(a);
    const bKeys = Object.keys(b);
    return (a === b ||
        (aKeys.length === bKeys.length &&
            aKeys.filter((k) => !ignore.has(k)).every((key) => a[key] === b[key])));
}
function extension_removeSignalListenersFromView(view, signalListeners) {
    const signalNames = Object.keys(signalListeners);
    for (const signalName of signalNames) {
        try {
            view.removeSignalListener(signalName, signalListeners[signalName]);
        }
        catch (error) {
            // eslint-disable-next-line no-console
            console.warn("Cannot remove invalid signal listener.", error);
        }
    }
    return signalNames.length > 0;
}
function extension_addSignalListenersToView(view, signalListeners) {
    const signalNames = Object.keys(signalListeners);
    for (const signalName of signalNames) {
        try {
            view.addSignalListener(signalName, signalListeners[signalName]);
        }
        catch (error) {
            console.warn("Cannot add invalid signal listener.", error);
        }
    }
    return signalNames.length > 0;
}
function extension_getUniqueFieldNames(specs) {
    return new Set(specs.flatMap((o) => Object.keys(o)));
}
function extension_computeSpecChanges(newSpec, oldSpec) {
    if (newSpec === oldSpec)
        return false;
    const changes = {
        width: false,
        height: false,
        isExpensive: false,
    };
    const hasWidth = "width" in newSpec || "width" in oldSpec;
    const hasHeight = "height" in newSpec || "height" in oldSpec;
    if (hasWidth &&
        (!("width" in newSpec) ||
            !("width" in oldSpec) ||
            newSpec.width !== oldSpec.width)) {
        if ("width" in newSpec && typeof newSpec.width === "number") {
            changes.width = newSpec.width;
        }
        else {
            changes.isExpensive = true;
        }
    }
    if (hasHeight &&
        (!("height" in newSpec) ||
            !("height" in oldSpec) ||
            newSpec.height !== oldSpec.height)) {
        if ("height" in newSpec && typeof newSpec.height === "number") {
            changes.height = newSpec.height;
        }
        else {
            changes.isExpensive = true;
        }
    }
    const fieldNames = [...extension_getUniqueFieldNames([newSpec, oldSpec])].filter((f) => f !== "width" && f !== "height");
    if (fieldNames.some((field) => !(field in newSpec) ||
        !(field in oldSpec) ||
        !extension_fast_deep_equal(newSpec[field], oldSpec[field]))) {
        changes.isExpensive = true;
    }
    return changes.width !== false ||
        changes.height !== false ||
        changes.isExpensive
        ? changes
        : false;
}
function extension_combineSpecWithDimension(spec, options) {
    const { width, height } = options;
    if (typeof width !== "undefined" && typeof height !== "undefined") {
        return { ...spec, width, height };
    }
    if (typeof width !== "undefined") {
        return { ...spec, width };
    }
    if (typeof height !== "undefined") {
        return { ...spec, height };
    }
    return spec;
}
//# sourceMappingURL=utils.js.map
;// ../../node_modules/svelte-vega/dist/VegaEmbed.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/node_modules/svelte-vega/dist/VegaEmbed.svelte generated by Svelte v3.59.2 */








function extension_VegaEmbed_svelte_create_fragment(ctx) {
	let div;

	return {
		c() {
			div = extension_internal_element("div");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			/*div_binding*/ ctx[11](div);
		},
		p: extension_noop,
		i: extension_noop,
		o: extension_noop,
		d(detaching) {
			if (detaching) extension_detach(div);
			/*div_binding*/ ctx[11](null);
		}
	};
}

function extension_VegaEmbed_svelte_instance($$self, $$props, $$invalidate) {
	let { options } = $$props;
	let { spec } = $$props;
	let { view } = $$props;
	let { signalListeners = {} } = $$props;
	let { data = {} } = $$props;
	const dispatch = extension_createEventDispatcher();
	let result = undefined;
	let prevOptions = {};
	let prevSignalListeners = {};
	let prevSpec = {};
	let prevData = {};
	let chartContainer;

	extension_onDestroy(() => {
		clearView();
	});

	async function createView() {
		clearView();

		try {
			$$invalidate(6, result = await extension_vega_embed_module_embed(chartContainer, spec, options));
			$$invalidate(1, view = result.view);

			if (extension_addSignalListenersToView(view, signalListeners)) {
				view.runAsync();
			}

			onNewView(view);
		} catch(e) {
			handleError(e);
		}
	}

	function clearView() {
		if (result) {
			result.finalize();
			$$invalidate(6, result = undefined);
			$$invalidate(1, view = undefined);
		}
	}

	function handleError(error) {
		dispatch("onError", { error });
		console.warn(error);
	}

	function onNewView(view) {
		update();
		dispatch("onNewView", { view });
	}

	async function update() {
		if (data && Object.keys(data).length > 0 && result !== undefined) {
			$$invalidate(1, view = result.view);
			extension_updateMultipleDatasetsInView(view, data);
			await view.resize().runAsync();
		}
	}

	function div_binding($$value) {
		extension_binding_callbacks[$$value ? 'unshift' : 'push'](() => {
			chartContainer = $$value;
			$$invalidate(0, chartContainer);
		});
	}

	$$self.$$set = $$props => {
		if ('options' in $$props) $$invalidate(2, options = $$props.options);
		if ('spec' in $$props) $$invalidate(3, spec = $$props.spec);
		if ('view' in $$props) $$invalidate(1, view = $$props.view);
		if ('signalListeners' in $$props) $$invalidate(4, signalListeners = $$props.signalListeners);
		if ('data' in $$props) $$invalidate(5, data = $$props.data);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*data, prevData*/ 1056) {
			$: {
				if (!extension_shallowEqual(data, prevData)) {
					update();
				}

				$$invalidate(10, prevData = data);
			}
		}

		if ($$self.$$.dirty & /*chartContainer, options, prevOptions, spec, prevSpec, signalListeners, prevSignalListeners, result, view*/ 991) {
			$: {
				if (chartContainer !== undefined) {
					// only create a new view if neccessary
					if (!extension_shallowEqual(options, prevOptions, extension_WIDTH_HEIGHT)) {
						createView();
					} else {
						const specChanges = extension_computeSpecChanges(extension_combineSpecWithDimension(spec, options), extension_combineSpecWithDimension(prevSpec, prevOptions));
						const newSignalListeners = signalListeners;
						const oldSignalListeners = prevSignalListeners;

						if (specChanges) {
							if (specChanges.isExpensive) {
								createView();
							} else if (result !== undefined) {
								const areSignalListenersChanged = !extension_shallowEqual(newSignalListeners, oldSignalListeners);
								$$invalidate(1, view = result.view);

								if (specChanges.width !== false) {
									view.width(specChanges.width);
								}

								if (specChanges.height !== false) {
									view.height(specChanges.height);
								}

								if (areSignalListenersChanged) {
									if (oldSignalListeners) {
										extension_removeSignalListenersFromView(view, oldSignalListeners);
									}

									if (newSignalListeners) {
										extension_addSignalListenersToView(view, newSignalListeners);
									}
								}

								view.runAsync();
							}
						} else if (!extension_shallowEqual(newSignalListeners, oldSignalListeners) && result !== undefined) {
							$$invalidate(1, view = result.view);

							if (oldSignalListeners) {
								extension_removeSignalListenersFromView(view, oldSignalListeners);
							}

							if (newSignalListeners) {
								extension_addSignalListenersToView(view, newSignalListeners);
							}

							view.runAsync();
						}
					}

					$$invalidate(7, prevOptions = options);
					$$invalidate(8, prevSignalListeners = signalListeners);
					$$invalidate(9, prevSpec = spec);
				}
			}
		}
	};

	return [
		chartContainer,
		view,
		options,
		spec,
		signalListeners,
		data,
		result,
		prevOptions,
		prevSignalListeners,
		prevSpec,
		prevData,
		div_binding
	];
}

class extension_VegaEmbed extends extension_SvelteComponent {
	constructor(options) {
		super();

		extension_init(this, options, extension_VegaEmbed_svelte_instance, extension_VegaEmbed_svelte_create_fragment, extension_safe_not_equal, {
			options: 2,
			spec: 3,
			view: 1,
			signalListeners: 4,
			data: 5
		});
	}
}

/* harmony default export */ const extension_VegaEmbed_svelte = (extension_VegaEmbed);
;// ../../node_modules/svelte-vega/dist/Vega.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/node_modules/svelte-vega/dist/Vega.svelte generated by Svelte v3.59.2 */




function extension_Vega_svelte_create_fragment(ctx) {
	let vegaembed;
	let updating_view;
	let current;

	function vegaembed_view_binding(value) {
		/*vegaembed_view_binding*/ ctx[6](value);
	}

	let vegaembed_props = {
		spec: /*spec*/ ctx[1],
		data: /*data*/ ctx[2],
		signalListeners: /*signalListeners*/ ctx[3],
		options: /*vegaOptions*/ ctx[4]
	};

	if (/*view*/ ctx[0] !== void 0) {
		vegaembed_props.view = /*view*/ ctx[0];
	}

	vegaembed = new extension_VegaEmbed_svelte({ props: vegaembed_props });
	extension_binding_callbacks.push(() => extension_bind(vegaembed, 'view', vegaembed_view_binding));
	vegaembed.$on("onNewView", /*onNewView_handler*/ ctx[7]);
	vegaembed.$on("onError", /*onError_handler*/ ctx[8]);

	return {
		c() {
			extension_create_component(vegaembed.$$.fragment);
		},
		m(target, anchor) {
			extension_mount_component(vegaembed, target, anchor);
			current = true;
		},
		p(ctx, [dirty]) {
			const vegaembed_changes = {};
			if (dirty & /*spec*/ 2) vegaembed_changes.spec = /*spec*/ ctx[1];
			if (dirty & /*data*/ 4) vegaembed_changes.data = /*data*/ ctx[2];
			if (dirty & /*signalListeners*/ 8) vegaembed_changes.signalListeners = /*signalListeners*/ ctx[3];
			if (dirty & /*vegaOptions*/ 16) vegaembed_changes.options = /*vegaOptions*/ ctx[4];

			if (!updating_view && dirty & /*view*/ 1) {
				updating_view = true;
				vegaembed_changes.view = /*view*/ ctx[0];
				extension_add_flush_callback(() => updating_view = false);
			}

			vegaembed.$set(vegaembed_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(vegaembed.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(vegaembed.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			extension_destroy_component(vegaembed, detaching);
		}
	};
}

const extension_mode = "vega";

function extension_Vega_svelte_instance($$self, $$props, $$invalidate) {
	let vegaOptions;
	let { spec } = $$props;
	let { options = {} } = $$props;
	let { data = {} } = $$props;
	let { signalListeners = {} } = $$props;
	let { view = undefined } = $$props;

	function vegaembed_view_binding(value) {
		view = value;
		$$invalidate(0, view);
	}

	function onNewView_handler(event) {
		extension_bubble.call(this, $$self, event);
	}

	function onError_handler(event) {
		extension_bubble.call(this, $$self, event);
	}

	$$self.$$set = $$props => {
		if ('spec' in $$props) $$invalidate(1, spec = $$props.spec);
		if ('options' in $$props) $$invalidate(5, options = $$props.options);
		if ('data' in $$props) $$invalidate(2, data = $$props.data);
		if ('signalListeners' in $$props) $$invalidate(3, signalListeners = $$props.signalListeners);
		if ('view' in $$props) $$invalidate(0, view = $$props.view);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*options*/ 32) {
			$: $$invalidate(4, vegaOptions = { ...options, mode: extension_mode });
		}
	};

	return [
		view,
		spec,
		data,
		signalListeners,
		vegaOptions,
		options,
		vegaembed_view_binding,
		onNewView_handler,
		onError_handler
	];
}

class extension_Vega extends extension_SvelteComponent {
	constructor(options) {
		super();

		extension_init(this, options, extension_Vega_svelte_instance, extension_Vega_svelte_create_fragment, extension_safe_not_equal, {
			spec: 1,
			options: 5,
			data: 2,
			signalListeners: 3,
			view: 0
		});
	}
}

/* harmony default export */ const extension_Vega_svelte = ((/* unused pure expression or super */ null && (extension_Vega)));
;// ../../node_modules/svelte-vega/dist/VegaLite.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/node_modules/svelte-vega/dist/VegaLite.svelte generated by Svelte v3.59.2 */




function extension_VegaLite_svelte_create_fragment(ctx) {
	let vegaembed;
	let updating_view;
	let current;

	function vegaembed_view_binding(value) {
		/*vegaembed_view_binding*/ ctx[6](value);
	}

	let vegaembed_props = {
		spec: /*spec*/ ctx[1],
		data: /*data*/ ctx[2],
		signalListeners: /*signalListeners*/ ctx[3],
		options: /*vegaLiteOptions*/ ctx[4]
	};

	if (/*view*/ ctx[0] !== void 0) {
		vegaembed_props.view = /*view*/ ctx[0];
	}

	vegaembed = new extension_VegaEmbed_svelte({ props: vegaembed_props });
	extension_binding_callbacks.push(() => extension_bind(vegaembed, 'view', vegaembed_view_binding));
	vegaembed.$on("onNewView", /*onNewView_handler*/ ctx[7]);
	vegaembed.$on("onError", /*onError_handler*/ ctx[8]);

	return {
		c() {
			extension_create_component(vegaembed.$$.fragment);
		},
		m(target, anchor) {
			extension_mount_component(vegaembed, target, anchor);
			current = true;
		},
		p(ctx, [dirty]) {
			const vegaembed_changes = {};
			if (dirty & /*spec*/ 2) vegaembed_changes.spec = /*spec*/ ctx[1];
			if (dirty & /*data*/ 4) vegaembed_changes.data = /*data*/ ctx[2];
			if (dirty & /*signalListeners*/ 8) vegaembed_changes.signalListeners = /*signalListeners*/ ctx[3];
			if (dirty & /*vegaLiteOptions*/ 16) vegaembed_changes.options = /*vegaLiteOptions*/ ctx[4];

			if (!updating_view && dirty & /*view*/ 1) {
				updating_view = true;
				vegaembed_changes.view = /*view*/ ctx[0];
				extension_add_flush_callback(() => updating_view = false);
			}

			vegaembed.$set(vegaembed_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(vegaembed.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(vegaembed.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			extension_destroy_component(vegaembed, detaching);
		}
	};
}

const extension_VegaLite_svelte_mode = "vega-lite";

function extension_VegaLite_svelte_instance($$self, $$props, $$invalidate) {
	let vegaLiteOptions;
	let { spec } = $$props;
	let { options = {} } = $$props;
	let { data = {} } = $$props;
	let { signalListeners = {} } = $$props;
	let { view = undefined } = $$props;

	function vegaembed_view_binding(value) {
		view = value;
		$$invalidate(0, view);
	}

	function onNewView_handler(event) {
		extension_bubble.call(this, $$self, event);
	}

	function onError_handler(event) {
		extension_bubble.call(this, $$self, event);
	}

	$$self.$$set = $$props => {
		if ('spec' in $$props) $$invalidate(1, spec = $$props.spec);
		if ('options' in $$props) $$invalidate(5, options = $$props.options);
		if ('data' in $$props) $$invalidate(2, data = $$props.data);
		if ('signalListeners' in $$props) $$invalidate(3, signalListeners = $$props.signalListeners);
		if ('view' in $$props) $$invalidate(0, view = $$props.view);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*options*/ 32) {
			$: $$invalidate(4, vegaLiteOptions = { ...options, mode: extension_VegaLite_svelte_mode });
		}
	};

	return [
		view,
		spec,
		data,
		signalListeners,
		vegaLiteOptions,
		options,
		vegaembed_view_binding,
		onNewView_handler,
		onError_handler
	];
}

class extension_VegaLite extends extension_SvelteComponent {
	constructor(options) {
		super();

		extension_init(this, options, extension_VegaLite_svelte_instance, extension_VegaLite_svelte_create_fragment, extension_safe_not_equal, {
			spec: 1,
			options: 5,
			data: 2,
			signalListeners: 3,
			view: 0
		});
	}
}

/* harmony default export */ const extension_VegaLite_svelte = (extension_VegaLite);
;// ../../node_modules/svelte-vega/dist/index.js



//# sourceMappingURL=index.js.map
;// ../../canvas_viz/dist/elements/CanvasVegaLite.svelte
/* media/satish/Development/workspace/projects/exploratory_data_analysis/deepview/src/deepview_canvas/canvas_viz/dist/elements/CanvasVegaLite.svelte generated by Svelte v3.59.2 */







function extension_CanvasVegaLite_svelte_create_fragment(ctx) {
	let vegalite;
	let current;

	vegalite = new extension_VegaLite_svelte({
			props: {
				spec: /*parsedSpec*/ ctx[1],
				data: /*parsedData*/ ctx[0],
				options: /*options*/ ctx[2],
				signalListeners: {
					select: /*handleSelect*/ ctx[3],
					brush: /*handleBrush*/ ctx[4]
				}
			}
		});

	return {
		c() {
			extension_create_component(vegalite.$$.fragment);
		},
		m(target, anchor) {
			extension_mount_component(vegalite, target, anchor);
			current = true;
		},
		p(ctx, [dirty]) {
			const vegalite_changes = {};
			if (dirty & /*parsedSpec*/ 2) vegalite_changes.spec = /*parsedSpec*/ ctx[1];
			if (dirty & /*parsedData*/ 1) vegalite_changes.data = /*parsedData*/ ctx[0];
			if (dirty & /*options*/ 4) vegalite_changes.options = /*options*/ ctx[2];
			vegalite.$set(vegalite_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(vegalite.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(vegalite.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			extension_destroy_component(vegalite, detaching);
		}
	};
}

function extension_binnedStringResolver(resolver, table) {
	const reduced_table = table.groupby(resolver.columnName).count();
	return { values: reduced_table };
}

function extension_CanvasVegaLite_svelte_instance($$self, $$props, $$invalidate) {
	let reducedData;
	let { data = {} } = $$props;
	let { spec } = $$props;
	let { table } = $$props;
	let { filteredTable } = $$props;
	let { showUnfilteredData } = $$props;
	let { width = undefined } = $$props;
	let { height = undefined } = $$props;
	let { resolver = undefined } = $$props;
	const dispatch = extension_createEventDispatcher();
	let parsedData = {};
	let parsedSpec = undefined;
	let parsedSpecRaw = undefined;
	let parsedSpecFiltered = undefined;
	let options = { actions: false };

	function parseSpecs(spec, data, reducedData, showUnfilteredData) {
		$$invalidate(1, parsedSpec = spec);
		parsedSpecRaw = Object.assign(Object.assign({}, spec), { params: [] });
		parsedSpecFiltered = Object.assign({}, spec);
		$$invalidate(0, parsedData = data);

		if (typeof data.values === "string") {
			const stringData = data.values;

			if (stringData && stringData === "arrow_table") {
				parsedSpecFiltered.data = reducedData.filtered;
				parsedSpecRaw.data = reducedData.raw;

				if (showUnfilteredData) {
					parsedSpecRaw.mark = Object.assign(Object.assign({}, parsedSpecRaw.mark), { color: "#dcdcdc" });

					$$invalidate(1, parsedSpec = {
						layer: [
							Object.assign({}, parsedSpecRaw),
							Object.assign({}, parsedSpecFiltered)
						]
					});
				} else {
					$$invalidate(1, parsedSpec = Object.assign({}, parsedSpecFiltered));
				}

				$$invalidate(0, parsedData = {});
			}
		}
	}

	function extractData(resolver, table, filteredTable) {
		if (resolver === undefined) {
			return {
				filtered: { values: filteredTable },
				raw: { values: table }
			};
		}

		switch (resolver.type) {
			case extension_ResolverType.NUMBER:
				return {
					filtered: numberResolver(resolver, filteredTable),
					raw: numberResolver(resolver, table)
				};
			default:
				return {
					filtered: extension_binnedStringResolver(resolver, filteredTable),
					raw: extension_binnedStringResolver(resolver, table)
				};
		}
	}

	function numberResolver(resolver, table) {
		const reducedTable = table.groupby({
			bin_0: extension_helpers_bin(resolver.columnName, { maxbins: 20 }),
			bin_1: extension_helpers_bin(resolver.columnName, { maxbins: 20, offset: 1 })
		}).count();

		return { values: reducedTable };
	}

	function handleSelect(_, value) {
		dispatch("select", { value });
	}

	function handleBrush(_, value) {
		dispatch("brush", { value });
	}

	$$self.$$set = $$props => {
		if ('data' in $$props) $$invalidate(5, data = $$props.data);
		if ('spec' in $$props) $$invalidate(6, spec = $$props.spec);
		if ('table' in $$props) $$invalidate(7, table = $$props.table);
		if ('filteredTable' in $$props) $$invalidate(8, filteredTable = $$props.filteredTable);
		if ('showUnfilteredData' in $$props) $$invalidate(9, showUnfilteredData = $$props.showUnfilteredData);
		if ('width' in $$props) $$invalidate(10, width = $$props.width);
		if ('height' in $$props) $$invalidate(11, height = $$props.height);
		if ('resolver' in $$props) $$invalidate(12, resolver = $$props.resolver);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*width*/ 1024) {
			$: if (width) $$invalidate(2, options.width = width, options);
		}

		if ($$self.$$.dirty & /*height*/ 2048) {
			$: if (height) $$invalidate(2, options.height = height, options);
		}

		if ($$self.$$.dirty & /*resolver, table, filteredTable*/ 4480) {
			$: $$invalidate(13, reducedData = extractData(resolver, table, filteredTable));
		}

		if ($$self.$$.dirty & /*spec, data, reducedData, showUnfilteredData*/ 8800) {
			$: parseSpecs(spec, data, reducedData, showUnfilteredData);
		}
	};

	return [
		parsedData,
		parsedSpec,
		options,
		handleSelect,
		handleBrush,
		data,
		spec,
		table,
		filteredTable,
		showUnfilteredData,
		width,
		height,
		resolver,
		reducedData
	];
}

class extension_CanvasVegaLite extends extension_SvelteComponent {
	constructor(options) {
		super();

		extension_init(this, options, extension_CanvasVegaLite_svelte_instance, extension_CanvasVegaLite_svelte_create_fragment, extension_safe_not_equal, {
			data: 5,
			spec: 6,
			table: 7,
			filteredTable: 8,
			showUnfilteredData: 9,
			width: 10,
			height: 11,
			resolver: 12
		});
	}
}

/* harmony default export */ const extension_CanvasVegaLite_svelte = (extension_CanvasVegaLite);
;// ./src/SummaryListElement.svelte
/* src/SummaryListElement.svelte generated by Svelte v3.59.2 */





function extension_SummaryListElement_svelte_create_if_block(ctx) {
	let div1;
	let div0;
	let textfield;
	let updating_value;
	let current;

	function textfield_value_binding(value) {
		/*textfield_value_binding*/ ctx[8](value);
	}

	let textfield_props = { placeholder: "Chart Title" };

	if (/*value*/ ctx[4] !== void 0) {
		textfield_props.value = /*value*/ ctx[4];
	}

	textfield = new extension_TextField_svelte({ props: textfield_props });
	extension_binding_callbacks.push(() => extension_bind(textfield, 'value', textfield_value_binding));

	return {
		c() {
			div1 = extension_internal_element("div");
			div0 = extension_internal_element("div");
			extension_create_component(textfield.$$.fragment);
			extension_attr(div0, "class", "flex-grow");
			extension_attr(div1, "class", "flex m-1");
		},
		m(target, anchor) {
			extension_insert(target, div1, anchor);
			extension_append(div1, div0);
			extension_mount_component(textfield, div0, null);
			current = true;
		},
		p(ctx, dirty) {
			const textfield_changes = {};

			if (!updating_value && dirty & /*value*/ 16) {
				updating_value = true;
				textfield_changes.value = /*value*/ ctx[4];
				extension_add_flush_callback(() => updating_value = false);
			}

			textfield.$set(textfield_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(textfield.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(textfield.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div1);
			extension_destroy_component(textfield);
		}
	};
}

function extension_SummaryListElement_svelte_create_fragment(ctx) {
	let div;
	let t;
	let canvasvegalite;
	let div_class_value;
	let current;
	let if_block = /*editMode*/ ctx[3] && extension_SummaryListElement_svelte_create_if_block(ctx);

	canvasvegalite = new extension_CanvasVegaLite_svelte({
			props: {
				data: /*typedData*/ ctx[5].data,
				spec: /*typedData*/ ctx[5].spec,
				resolver: /*typedData*/ ctx[5].resolver,
				table: /*table*/ ctx[1],
				filteredTable: /*filteredTable*/ ctx[2],
				showUnfilteredData: /*canvasSpec*/ ctx[0].showUnfilteredData
			}
		});

	return {
		c() {
			div = extension_internal_element("div");
			if (if_block) if_block.c();
			t = extension_space();
			extension_create_component(canvasvegalite.$$.fragment);

			extension_attr(div, "class", div_class_value = "" + ((/*editMode*/ ctx[3]
			? 'border border-button_outline'
			: '') + " rounded m-1 flex flex-col"));
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			if (if_block) if_block.m(div, null);
			extension_append(div, t);
			extension_mount_component(canvasvegalite, div, null);
			current = true;
		},
		p(ctx, [dirty]) {
			if (/*editMode*/ ctx[3]) {
				if (if_block) {
					if_block.p(ctx, dirty);

					if (dirty & /*editMode*/ 8) {
						extension_transition_in(if_block, 1);
					}
				} else {
					if_block = extension_SummaryListElement_svelte_create_if_block(ctx);
					if_block.c();
					extension_transition_in(if_block, 1);
					if_block.m(div, t);
				}
			} else if (if_block) {
				extension_group_outros();

				extension_transition_out(if_block, 1, 1, () => {
					if_block = null;
				});

				extension_check_outros();
			}

			const canvasvegalite_changes = {};
			if (dirty & /*typedData*/ 32) canvasvegalite_changes.data = /*typedData*/ ctx[5].data;
			if (dirty & /*typedData*/ 32) canvasvegalite_changes.spec = /*typedData*/ ctx[5].spec;
			if (dirty & /*typedData*/ 32) canvasvegalite_changes.resolver = /*typedData*/ ctx[5].resolver;
			if (dirty & /*table*/ 2) canvasvegalite_changes.table = /*table*/ ctx[1];
			if (dirty & /*filteredTable*/ 4) canvasvegalite_changes.filteredTable = /*filteredTable*/ ctx[2];
			if (dirty & /*canvasSpec*/ 1) canvasvegalite_changes.showUnfilteredData = /*canvasSpec*/ ctx[0].showUnfilteredData;
			canvasvegalite.$set(canvasvegalite_changes);

			if (!current || dirty & /*editMode*/ 8 && div_class_value !== (div_class_value = "" + ((/*editMode*/ ctx[3]
			? 'border border-button_outline'
			: '') + " rounded m-1 flex flex-col"))) {
				extension_attr(div, "class", div_class_value);
			}
		},
		i(local) {
			if (current) return;
			extension_transition_in(if_block);
			extension_transition_in(canvasvegalite.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(if_block);
			extension_transition_out(canvasvegalite.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			if (if_block) if_block.d();
			extension_destroy_component(canvasvegalite);
		}
	};
}

function extension_SummaryListElement_svelte_instance($$self, $$props, $$invalidate) {
	let typedData;
	let title;
	let { canvasSpec } = $$props;
	let { element } = $$props;
	let { table } = $$props;
	let { filteredTable } = $$props;
	let { editMode = false } = $$props;
	let value = '';
	const dispatch = extension_createEventDispatcher();

	function textfield_value_binding(value$1) {
		value = value$1;
		((($$invalidate(4, value), $$invalidate(7, title)), $$invalidate(5, typedData)), $$invalidate(6, element));
	}

	$$self.$$set = $$props => {
		if ('canvasSpec' in $$props) $$invalidate(0, canvasSpec = $$props.canvasSpec);
		if ('element' in $$props) $$invalidate(6, element = $$props.element);
		if ('table' in $$props) $$invalidate(1, table = $$props.table);
		if ('filteredTable' in $$props) $$invalidate(2, filteredTable = $$props.filteredTable);
		if ('editMode' in $$props) $$invalidate(3, editMode = $$props.editMode);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*element*/ 64) {
			$: $$invalidate(5, typedData = element.data);
		}

		if ($$self.$$.dirty & /*typedData*/ 32) {
			$: $$invalidate(7, title = typedData.spec.title === undefined
			? ''
			: typedData.spec.title);
		}

		if ($$self.$$.dirty & /*title*/ 128) {
			$: $$invalidate(4, value = title);
		}

		if ($$self.$$.dirty & /*value, typedData, element*/ 112) {
			$: {
				if (value !== typedData.spec.title) {
					dispatch('update', {
						element: Object.assign(Object.assign({}, element), {
							data: Object.assign(Object.assign({}, typedData), {
								spec: Object.assign(Object.assign({}, typedData.spec), { title: value })
							})
						}),
						oldElement: element
					});
				}
			}
		}
	};

	return [
		canvasSpec,
		table,
		filteredTable,
		editMode,
		value,
		typedData,
		element,
		title,
		textfield_value_binding
	];
}

class extension_SummaryListElement extends extension_SvelteComponent {
	constructor(options) {
		super();

		extension_init(this, options, extension_SummaryListElement_svelte_instance, extension_SummaryListElement_svelte_create_fragment, extension_safe_not_equal, {
			canvasSpec: 0,
			element: 6,
			table: 1,
			filteredTable: 2,
			editMode: 3
		});
	}
}

/* harmony default export */ const extension_SummaryListElement_svelte = (extension_SummaryListElement);
;// ./src/SummaryNumberElement.svelte
/* src/SummaryNumberElement.svelte generated by Svelte v3.59.2 */


function extension_SummaryNumberElement_svelte_create_fragment(ctx) {
	let div;
	let p0;
	let t0;
	let t1;
	let t2;
	let p1;
	let t3_value = /*data*/ ctx[0].toLocaleString() + "";
	let t3;
	let div_class_value;

	return {
		c() {
			div = extension_internal_element("div");
			p0 = extension_internal_element("p");
			t0 = extension_internal_text(/*name*/ ctx[1]);
			t1 = extension_internal_text(":");
			t2 = extension_space();
			p1 = extension_internal_element("p");
			t3 = extension_internal_text(t3_value);
			extension_attr(p0, "class", "font-bold mr-2");

			extension_attr(div, "class", div_class_value = "" + ((/*editMode*/ ctx[2]
			? 'border border-button_outline '
			: '') + " flex p-2 m-1 rounded"));
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			extension_append(div, p0);
			extension_append(p0, t0);
			extension_append(p0, t1);
			extension_append(div, t2);
			extension_append(div, p1);
			extension_append(p1, t3);
		},
		p(ctx, [dirty]) {
			if (dirty & /*name*/ 2) extension_set_data(t0, /*name*/ ctx[1]);
			if (dirty & /*data*/ 1 && t3_value !== (t3_value = /*data*/ ctx[0].toLocaleString() + "")) extension_set_data(t3, t3_value);

			if (dirty & /*editMode*/ 4 && div_class_value !== (div_class_value = "" + ((/*editMode*/ ctx[2]
			? 'border border-button_outline '
			: '') + " flex p-2 m-1 rounded"))) {
				extension_attr(div, "class", div_class_value);
			}
		},
		i: extension_noop,
		o: extension_noop,
		d(detaching) {
			if (detaching) extension_detach(div);
		}
	};
}

function extension_SummaryNumberElement_svelte_instance($$self, $$props, $$invalidate) {
	let { data } = $$props;
	let { name } = $$props;
	let { editMode } = $$props;

	$$self.$$set = $$props => {
		if ('data' in $$props) $$invalidate(0, data = $$props.data);
		if ('name' in $$props) $$invalidate(1, name = $$props.name);
		if ('editMode' in $$props) $$invalidate(2, editMode = $$props.editMode);
	};

	return [data, name, editMode];
}

class extension_SummaryNumberElement extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_SummaryNumberElement_svelte_instance, extension_SummaryNumberElement_svelte_create_fragment, extension_safe_not_equal, { data: 0, name: 1, editMode: 2 });
	}
}

/* harmony default export */ const extension_SummaryNumberElement_svelte = (extension_SummaryNumberElement);
;// ./src/SelectedQueries.svelte
/* src/SelectedQueries.svelte generated by Svelte v3.59.2 */






function extension_SelectedQueries_svelte_get_each_context(ctx, list, i) {
	const child_ctx = ctx.slice();
	child_ctx[4] = list[i];
	return child_ctx;
}

// (32:6) {#if query.icon !== undefined}
function extension_SelectedQueries_svelte_create_if_block(ctx) {
	let fa;
	let current;
	fa = new extension_fa_svelte({ props: { icon: /*query*/ ctx[4].icon } });

	return {
		c() {
			extension_create_component(fa.$$.fragment);
		},
		m(target, anchor) {
			extension_mount_component(fa, target, anchor);
			current = true;
		},
		p(ctx, dirty) {
			const fa_changes = {};
			if (dirty & /*selectedQueries*/ 1) fa_changes.icon = /*query*/ ctx[4].icon;
			fa.$set(fa_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(fa.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(fa.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			extension_destroy_component(fa, detaching);
		}
	};
}

// (26:2) {#each selectedQueries as query}
function extension_SelectedQueries_svelte_create_each_block(ctx) {
	let div;
	let t0;
	let span;
	let t1_value = /*query*/ ctx[4].name + "";
	let t1;
	let t2;
	let div_transition;
	let current;
	let mounted;
	let dispose;
	let if_block = /*query*/ ctx[4].icon !== undefined && extension_SelectedQueries_svelte_create_if_block(ctx);

	function click_handler() {
		return /*click_handler*/ ctx[2](/*query*/ ctx[4]);
	}

	return {
		c() {
			div = extension_internal_element("div");
			if (if_block) if_block.c();
			t0 = extension_space();
			span = extension_internal_element("span");
			t1 = extension_internal_text(t1_value);
			t2 = extension_space();
			extension_attr(span, "class", "pl-1");
			extension_attr(div, "class", "flex flex-grow justify-center items-center m-1 p-1 border rounded cursor-pointer bg-midgrey");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			if (if_block) if_block.m(div, null);
			extension_append(div, t0);
			extension_append(div, span);
			extension_append(span, t1);
			extension_append(div, t2);
			current = true;

			if (!mounted) {
				dispose = extension_listen(div, "click", click_handler);
				mounted = true;
			}
		},
		p(new_ctx, dirty) {
			ctx = new_ctx;

			if (/*query*/ ctx[4].icon !== undefined) {
				if (if_block) {
					if_block.p(ctx, dirty);

					if (dirty & /*selectedQueries*/ 1) {
						extension_transition_in(if_block, 1);
					}
				} else {
					if_block = extension_SelectedQueries_svelte_create_if_block(ctx);
					if_block.c();
					extension_transition_in(if_block, 1);
					if_block.m(div, t0);
				}
			} else if (if_block) {
				extension_group_outros();

				extension_transition_out(if_block, 1, 1, () => {
					if_block = null;
				});

				extension_check_outros();
			}

			if ((!current || dirty & /*selectedQueries*/ 1) && t1_value !== (t1_value = /*query*/ ctx[4].name + "")) extension_set_data(t1, t1_value);
		},
		i(local) {
			if (current) return;
			extension_transition_in(if_block);

			extension_add_render_callback(() => {
				if (!current) return;
				if (!div_transition) div_transition = extension_create_bidirectional_transition(div, extension_slide, {}, true);
				div_transition.run(1);
			});

			current = true;
		},
		o(local) {
			extension_transition_out(if_block);
			if (!div_transition) div_transition = extension_create_bidirectional_transition(div, extension_slide, {}, false);
			div_transition.run(0);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			if (if_block) if_block.d();
			if (detaching && div_transition) div_transition.end();
			mounted = false;
			dispose();
		}
	};
}

function extension_SelectedQueries_svelte_create_fragment(ctx) {
	let div;
	let current;
	let each_value = /*selectedQueries*/ ctx[0];
	let each_blocks = [];

	for (let i = 0; i < each_value.length; i += 1) {
		each_blocks[i] = extension_SelectedQueries_svelte_create_each_block(extension_SelectedQueries_svelte_get_each_context(ctx, each_value, i));
	}

	const out = i => extension_transition_out(each_blocks[i], 1, 1, () => {
		each_blocks[i] = null;
	});

	return {
		c() {
			div = extension_internal_element("div");

			for (let i = 0; i < each_blocks.length; i += 1) {
				each_blocks[i].c();
			}

			extension_attr(div, "class", "flex flex-col");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);

			for (let i = 0; i < each_blocks.length; i += 1) {
				if (each_blocks[i]) {
					each_blocks[i].m(div, null);
				}
			}

			current = true;
		},
		p(ctx, [dirty]) {
			if (dirty & /*previousQuery, selectedQueries, undefined*/ 3) {
				each_value = /*selectedQueries*/ ctx[0];
				let i;

				for (i = 0; i < each_value.length; i += 1) {
					const child_ctx = extension_SelectedQueries_svelte_get_each_context(ctx, each_value, i);

					if (each_blocks[i]) {
						each_blocks[i].p(child_ctx, dirty);
						extension_transition_in(each_blocks[i], 1);
					} else {
						each_blocks[i] = extension_SelectedQueries_svelte_create_each_block(child_ctx);
						each_blocks[i].c();
						extension_transition_in(each_blocks[i], 1);
						each_blocks[i].m(div, null);
					}
				}

				extension_group_outros();

				for (i = each_value.length; i < each_blocks.length; i += 1) {
					out(i);
				}

				extension_check_outros();
			}
		},
		i(local) {
			if (current) return;

			for (let i = 0; i < each_value.length; i += 1) {
				extension_transition_in(each_blocks[i]);
			}

			current = true;
		},
		o(local) {
			each_blocks = each_blocks.filter(Boolean);

			for (let i = 0; i < each_blocks.length; i += 1) {
				extension_transition_out(each_blocks[i]);
			}

			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			extension_destroy_each(each_blocks, detaching);
		}
	};
}

function extension_SelectedQueries_svelte_instance($$self, $$props, $$invalidate) {
	let { selectedQueries } = $$props;
	const dispatch = extension_createEventDispatcher();

	function previousQuery(query) {
		dispatch('previousQuery', { query });
	}

	const click_handler = query => previousQuery(query);

	$$self.$$set = $$props => {
		if ('selectedQueries' in $$props) $$invalidate(0, selectedQueries = $$props.selectedQueries);
	};

	return [selectedQueries, previousQuery, click_handler];
}

class extension_SelectedQueries extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_SelectedQueries_svelte_instance, extension_SelectedQueries_svelte_create_fragment, extension_safe_not_equal, { selectedQueries: 0 });
	}
}

/* harmony default export */ const extension_SelectedQueries_svelte = (extension_SelectedQueries);
;// ./src/NextQueries.svelte
/* src/NextQueries.svelte generated by Svelte v3.59.2 */






function extension_NextQueries_svelte_get_each_context(ctx, list, i) {
	const child_ctx = ctx.slice();
	child_ctx[5] = list[i];
	return child_ctx;
}

// (32:6) {#if query.icon !== undefined}
function extension_NextQueries_svelte_create_if_block(ctx) {
	let fa;
	let current;

	fa = new extension_fa_svelte({
			props: {
				color: "#7f7f7f",
				icon: /*query*/ ctx[5].icon
			}
		});

	return {
		c() {
			extension_create_component(fa.$$.fragment);
		},
		m(target, anchor) {
			extension_mount_component(fa, target, anchor);
			current = true;
		},
		p(ctx, dirty) {
			const fa_changes = {};
			if (dirty & /*nextQueries*/ 1) fa_changes.icon = /*query*/ ctx[5].icon;
			fa.$set(fa_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(fa.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(fa.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			extension_destroy_component(fa, detaching);
		}
	};
}

// (27:2) {#each nextQueries as query}
function extension_NextQueries_svelte_create_each_block(ctx) {
	let div;
	let t0;
	let span;
	let t1_value = /*query*/ ctx[5].name + "";
	let t1;
	let t2;
	let current;
	let mounted;
	let dispose;
	let if_block = /*query*/ ctx[5].icon !== undefined && extension_NextQueries_svelte_create_if_block(ctx);

	function click_handler() {
		return /*click_handler*/ ctx[3](/*query*/ ctx[5]);
	}

	return {
		c() {
			div = extension_internal_element("div");
			if (if_block) if_block.c();
			t0 = extension_space();
			span = extension_internal_element("span");
			t1 = extension_internal_text(t1_value);
			t2 = extension_space();
			extension_attr(span, "class", "pl-1 text-darkgrey");
			extension_attr(div, "class", "flex flex-grow justify-center items-center m-1 p-1 border border-midgrey rounded cursor-pointer");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			if (if_block) if_block.m(div, null);
			extension_append(div, t0);
			extension_append(div, span);
			extension_append(span, t1);
			extension_append(div, t2);
			current = true;

			if (!mounted) {
				dispose = extension_listen(div, "click", click_handler);
				mounted = true;
			}
		},
		p(new_ctx, dirty) {
			ctx = new_ctx;

			if (/*query*/ ctx[5].icon !== undefined) {
				if (if_block) {
					if_block.p(ctx, dirty);

					if (dirty & /*nextQueries*/ 1) {
						extension_transition_in(if_block, 1);
					}
				} else {
					if_block = extension_NextQueries_svelte_create_if_block(ctx);
					if_block.c();
					extension_transition_in(if_block, 1);
					if_block.m(div, t0);
				}
			} else if (if_block) {
				extension_group_outros();

				extension_transition_out(if_block, 1, 1, () => {
					if_block = null;
				});

				extension_check_outros();
			}

			if ((!current || dirty & /*nextQueries*/ 1) && t1_value !== (t1_value = /*query*/ ctx[5].name + "")) extension_set_data(t1, t1_value);
		},
		i(local) {
			if (current) return;
			extension_transition_in(if_block);
			current = true;
		},
		o(local) {
			extension_transition_out(if_block);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			if (if_block) if_block.d();
			mounted = false;
			dispose();
		}
	};
}

function extension_NextQueries_svelte_create_fragment(ctx) {
	let div;
	let div_transition;
	let current;
	let each_value = /*nextQueries*/ ctx[0];
	let each_blocks = [];

	for (let i = 0; i < each_value.length; i += 1) {
		each_blocks[i] = extension_NextQueries_svelte_create_each_block(extension_NextQueries_svelte_get_each_context(ctx, each_value, i));
	}

	const out = i => extension_transition_out(each_blocks[i], 1, 1, () => {
		each_blocks[i] = null;
	});

	return {
		c() {
			div = extension_internal_element("div");

			for (let i = 0; i < each_blocks.length; i += 1) {
				each_blocks[i].c();
			}

			extension_attr(div, "class", "flex flex-wrap");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);

			for (let i = 0; i < each_blocks.length; i += 1) {
				if (each_blocks[i]) {
					each_blocks[i].m(div, null);
				}
			}

			current = true;
		},
		p(ctx, [dirty]) {
			if (dirty & /*querySelected, nextQueries, undefined*/ 3) {
				each_value = /*nextQueries*/ ctx[0];
				let i;

				for (i = 0; i < each_value.length; i += 1) {
					const child_ctx = extension_NextQueries_svelte_get_each_context(ctx, each_value, i);

					if (each_blocks[i]) {
						each_blocks[i].p(child_ctx, dirty);
						extension_transition_in(each_blocks[i], 1);
					} else {
						each_blocks[i] = extension_NextQueries_svelte_create_each_block(child_ctx);
						each_blocks[i].c();
						extension_transition_in(each_blocks[i], 1);
						each_blocks[i].m(div, null);
					}
				}

				extension_group_outros();

				for (i = each_value.length; i < each_blocks.length; i += 1) {
					out(i);
				}

				extension_check_outros();
			}
		},
		i(local) {
			if (current) return;

			for (let i = 0; i < each_value.length; i += 1) {
				extension_transition_in(each_blocks[i]);
			}

			extension_add_render_callback(() => {
				if (!current) return;
				if (!div_transition) div_transition = extension_create_bidirectional_transition(div, extension_fade, {}, true);
				div_transition.run(1);
			});

			current = true;
		},
		o(local) {
			each_blocks = each_blocks.filter(Boolean);

			for (let i = 0; i < each_blocks.length; i += 1) {
				extension_transition_out(each_blocks[i]);
			}

			if (!div_transition) div_transition = extension_create_bidirectional_transition(div, extension_fade, {}, false);
			div_transition.run(0);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			extension_destroy_each(each_blocks, detaching);
			if (detaching && div_transition) div_transition.end();
		}
	};
}

function extension_NextQueries_svelte_instance($$self, $$props, $$invalidate) {
	let nextQueries;
	let { currentQuery } = $$props;
	const dispatch = extension_createEventDispatcher();

	function querySelected(query) {
		dispatch('querySelected', { query });
	}

	const click_handler = query => querySelected(query);

	$$self.$$set = $$props => {
		if ('currentQuery' in $$props) $$invalidate(2, currentQuery = $$props.currentQuery);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*currentQuery*/ 4) {
			$: $$invalidate(0, nextQueries = currentQuery.next);
		}
	};

	return [nextQueries, querySelected, currentQuery, click_handler];
}

class extension_NextQueries extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_NextQueries_svelte_instance, extension_NextQueries_svelte_create_fragment, extension_safe_not_equal, { currentQuery: 2 });
	}
}

/* harmony default export */ const extension_NextQueries_svelte = (extension_NextQueries);
;// ./src/SummaryChartSelection.svelte
/* src/SummaryChartSelection.svelte generated by Svelte v3.59.2 */








function extension_SummaryChartSelection_svelte_create_fragment(ctx) {
	let div1;
	let div0;
	let selectedqueries;
	let t;
	let nextqueries;
	let div1_transition;
	let current;

	selectedqueries = new extension_SelectedQueries_svelte({
			props: {
				selectedQueries: /*selectedQueries*/ ctx[0]
			}
		});

	selectedqueries.$on("previousQuery", /*previousQuery*/ ctx[3]);

	nextqueries = new extension_NextQueries_svelte({
			props: { currentQuery: /*currentQuery*/ ctx[1] }
		});

	nextqueries.$on("querySelected", /*querySelected*/ ctx[2]);

	return {
		c() {
			div1 = extension_internal_element("div");
			div0 = extension_internal_element("div");
			extension_create_component(selectedqueries.$$.fragment);
			t = extension_space();
			extension_create_component(nextqueries.$$.fragment);
			extension_attr(div0, "class", "flex flex-col");
			extension_attr(div1, "class", "flex flex-col p-2 bg-lightgrey border-midgrey border-2 rounded select-none");
		},
		m(target, anchor) {
			extension_insert(target, div1, anchor);
			extension_append(div1, div0);
			extension_mount_component(selectedqueries, div0, null);
			extension_append(div0, t);
			extension_mount_component(nextqueries, div0, null);
			current = true;
		},
		p(ctx, [dirty]) {
			const selectedqueries_changes = {};
			if (dirty & /*selectedQueries*/ 1) selectedqueries_changes.selectedQueries = /*selectedQueries*/ ctx[0];
			selectedqueries.$set(selectedqueries_changes);
			const nextqueries_changes = {};
			if (dirty & /*currentQuery*/ 2) nextqueries_changes.currentQuery = /*currentQuery*/ ctx[1];
			nextqueries.$set(nextqueries_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(selectedqueries.$$.fragment, local);
			extension_transition_in(nextqueries.$$.fragment, local);

			extension_add_render_callback(() => {
				if (!current) return;
				if (!div1_transition) div1_transition = extension_create_bidirectional_transition(div1, extension_fade, {}, true);
				div1_transition.run(1);
			});

			current = true;
		},
		o(local) {
			extension_transition_out(selectedqueries.$$.fragment, local);
			extension_transition_out(nextqueries.$$.fragment, local);
			if (!div1_transition) div1_transition = extension_create_bidirectional_transition(div1, extension_fade, {}, false);
			div1_transition.run(0);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div1);
			extension_destroy_component(selectedqueries);
			extension_destroy_component(nextqueries);
			if (detaching && div1_transition) div1_transition.end();
		}
	};
}

function extension_SummaryChartSelection_svelte_instance($$self, $$props, $$invalidate) {
	let { table } = $$props;
	const dispatch = extension_createEventDispatcher();
	let selectedQueries = [];
	let currentQuery = extension_getQueryTree(table);

	function querySelected(event) {
		const query = event.detail.query;

		if (typeof query.next === 'function') {
			dispatch('elementSelected', {
				element: query.next(selectedQueries.map(query => query.name), table)
			});

			$$invalidate(1, currentQuery = extension_getQueryTree(table));
			$$invalidate(0, selectedQueries = []);
		} else {
			$$invalidate(0, selectedQueries = [...selectedQueries, query]);
			$$invalidate(1, currentQuery = query);
		}
	}

	function previousQuery(event) {
		const previousQuery = event.detail.query;
		const index = selectedQueries.findIndex(query => query === previousQuery);

		if (index === 0) {
			$$invalidate(1, currentQuery = extension_getQueryTree(table));
			$$invalidate(0, selectedQueries = []);
		} else {
			$$invalidate(1, currentQuery = selectedQueries[index - 1]);
			selectedQueries.slice(index - 1);
		}
	}

	$$self.$$set = $$props => {
		if ('table' in $$props) $$invalidate(4, table = $$props.table);
	};

	return [selectedQueries, currentQuery, querySelected, previousQuery, table];
}

class extension_SummaryChartSelection extends extension_SvelteComponent {
	constructor(options) {
		super();
		extension_init(this, options, extension_SummaryChartSelection_svelte_instance, extension_SummaryChartSelection_svelte_create_fragment, extension_safe_not_equal, { table: 4 });
	}
}

/* harmony default export */ const extension_SummaryChartSelection_svelte = (extension_SummaryChartSelection);
;// ./src/CanvasSummary.svelte
/* src/CanvasSummary.svelte generated by Svelte v3.59.2 */















function extension_CanvasSummary_svelte_get_each_context(ctx, list, i) {
	const child_ctx = ctx.slice();
	child_ctx[24] = list[i];
	return child_ctx;
}

function extension_get_each_context_1(ctx, list, i) {
	const child_ctx = ctx.slice();
	child_ctx[24] = list[i];
	return child_ctx;
}

// (73:8) 
function extension_CanvasSummary_svelte_create_icon_slot(ctx) {
	let fa;
	let current;

	fa = new extension_fa_svelte({
			props: {
				icon: /*editMode*/ ctx[6] ? extension_faCheck/* faCheck */.e6 : extension_faEdit/* faEdit */.MT,
				slot: "icon"
			}
		});

	return {
		c() {
			extension_create_component(fa.$$.fragment);
		},
		m(target, anchor) {
			extension_mount_component(fa, target, anchor);
			current = true;
		},
		p(ctx, dirty) {
			const fa_changes = {};
			if (dirty & /*editMode*/ 64) fa_changes.icon = /*editMode*/ ctx[6] ? extension_faCheck/* faCheck */.e6 : extension_faEdit/* faEdit */.MT;
			fa.$set(fa_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(fa.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(fa.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			extension_destroy_component(fa, detaching);
		}
	};
}

// (74:8) 
function extension_CanvasSummary_svelte_create_text_slot(ctx) {
	let span;
	let t_value = (/*editMode*/ ctx[6] ? 'Done' : 'Edit') + "";
	let t;

	return {
		c() {
			span = extension_internal_element("span");
			t = extension_internal_text(t_value);
			extension_attr(span, "slot", "text");
		},
		m(target, anchor) {
			extension_insert(target, span, anchor);
			extension_append(span, t);
		},
		p(ctx, dirty) {
			if (dirty & /*editMode*/ 64 && t_value !== (t_value = (/*editMode*/ ctx[6] ? 'Done' : 'Edit') + "")) extension_set_data(t, t_value);
		},
		d(detaching) {
			if (detaching) extension_detach(span);
		}
	};
}

// (66:2) <ComponentHeader     title={'Summary'}     description={widgetSpec.description}     {container}   >
function extension_create_default_slot(ctx) {
	let div;
	let iconbutton;
	let current;

	iconbutton = new extension_IconButton_svelte({
			props: {
				$$slots: {
					text: [extension_CanvasSummary_svelte_create_text_slot],
					icon: [extension_CanvasSummary_svelte_create_icon_slot]
				},
				$$scope: { ctx }
			}
		});

	iconbutton.$on("click", /*click_handler*/ ctx[17]);

	return {
		c() {
			div = extension_internal_element("div");
			extension_create_component(iconbutton.$$.fragment);
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			extension_mount_component(iconbutton, div, null);
			current = true;
		},
		p(ctx, dirty) {
			const iconbutton_changes = {};

			if (dirty & /*$$scope, editMode*/ 536870976) {
				iconbutton_changes.$$scope = { dirty, ctx };
			}

			iconbutton.$set(iconbutton_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(iconbutton.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(iconbutton.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			extension_destroy_component(iconbutton);
		}
	};
}

// (78:2) {#if editMode}
function extension_create_if_block_3(ctx) {
	let summarychartselection;
	let current;
	summarychartselection = new extension_SummaryChartSelection_svelte({ props: { table: /*$table*/ ctx[5] } });
	summarychartselection.$on("elementSelected", /*addElement*/ ctx[13]);

	return {
		c() {
			extension_create_component(summarychartselection.$$.fragment);
		},
		m(target, anchor) {
			extension_mount_component(summarychartselection, target, anchor);
			current = true;
		},
		p(ctx, dirty) {
			const summarychartselection_changes = {};
			if (dirty & /*$table*/ 32) summarychartselection_changes.table = /*$table*/ ctx[5];
			summarychartselection.$set(summarychartselection_changes);
		},
		i(local) {
			if (current) return;
			extension_transition_in(summarychartselection.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(summarychartselection.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			extension_destroy_component(summarychartselection, detaching);
		}
	};
}

// (125:4) {:else}
function extension_CanvasSummary_svelte_create_else_block(ctx) {
	let p;

	return {
		c() {
			p = extension_internal_element("p");
			p.textContent = "There was no data found to display in the summary charts.";
		},
		m(target, anchor) {
			extension_insert(target, p, anchor);
		},
		p: extension_noop,
		i: extension_noop,
		o: extension_noop,
		d(detaching) {
			if (detaching) extension_detach(p);
		}
	};
}

// (82:4) {#if CharacterData.length > 0 || numberData.length > 0}
function extension_CanvasSummary_svelte_create_if_block(ctx) {
	let div0;
	let t;
	let div1;
	let current;
	let each_value_1 = /*numberData*/ ctx[9];
	let each_blocks_1 = [];

	for (let i = 0; i < each_value_1.length; i += 1) {
		each_blocks_1[i] = extension_create_each_block_1(extension_get_each_context_1(ctx, each_value_1, i));
	}

	const out = i => extension_transition_out(each_blocks_1[i], 1, 1, () => {
		each_blocks_1[i] = null;
	});

	let each_value = /*chartData*/ ctx[8];
	let each_blocks = [];

	for (let i = 0; i < each_value.length; i += 1) {
		each_blocks[i] = extension_CanvasSummary_svelte_create_each_block(extension_CanvasSummary_svelte_get_each_context(ctx, each_value, i));
	}

	const out_1 = i => extension_transition_out(each_blocks[i], 1, 1, () => {
		each_blocks[i] = null;
	});

	return {
		c() {
			div0 = extension_internal_element("div");

			for (let i = 0; i < each_blocks_1.length; i += 1) {
				each_blocks_1[i].c();
			}

			t = extension_space();
			div1 = extension_internal_element("div");

			for (let i = 0; i < each_blocks.length; i += 1) {
				each_blocks[i].c();
			}

			extension_attr(div0, "class", "flex flex-wrap");
			extension_attr(div1, "class", "flex flex-wrap");
		},
		m(target, anchor) {
			extension_insert(target, div0, anchor);

			for (let i = 0; i < each_blocks_1.length; i += 1) {
				if (each_blocks_1[i]) {
					each_blocks_1[i].m(div0, null);
				}
			}

			extension_insert(target, t, anchor);
			extension_insert(target, div1, anchor);

			for (let i = 0; i < each_blocks.length; i += 1) {
				if (each_blocks[i]) {
					each_blocks[i].m(div1, null);
				}
			}

			current = true;
		},
		p(ctx, dirty) {
			if (dirty & /*removeElement, numberData, faTimes, editMode*/ 4672) {
				each_value_1 = /*numberData*/ ctx[9];
				let i;

				for (i = 0; i < each_value_1.length; i += 1) {
					const child_ctx = extension_get_each_context_1(ctx, each_value_1, i);

					if (each_blocks_1[i]) {
						each_blocks_1[i].p(child_ctx, dirty);
						extension_transition_in(each_blocks_1[i], 1);
					} else {
						each_blocks_1[i] = extension_create_each_block_1(child_ctx);
						each_blocks_1[i].c();
						extension_transition_in(each_blocks_1[i], 1);
						each_blocks_1[i].m(div0, null);
					}
				}

				extension_group_outros();

				for (i = each_value_1.length; i < each_blocks_1.length; i += 1) {
					out(i);
				}

				extension_check_outros();
			}

			if (dirty & /*removeElement, chartData, faTimes, editMode, $table, $filteredTable, $canvasSpec, updateElement*/ 23904) {
				each_value = /*chartData*/ ctx[8];
				let i;

				for (i = 0; i < each_value.length; i += 1) {
					const child_ctx = extension_CanvasSummary_svelte_get_each_context(ctx, each_value, i);

					if (each_blocks[i]) {
						each_blocks[i].p(child_ctx, dirty);
						extension_transition_in(each_blocks[i], 1);
					} else {
						each_blocks[i] = extension_CanvasSummary_svelte_create_each_block(child_ctx);
						each_blocks[i].c();
						extension_transition_in(each_blocks[i], 1);
						each_blocks[i].m(div1, null);
					}
				}

				extension_group_outros();

				for (i = each_value.length; i < each_blocks.length; i += 1) {
					out_1(i);
				}

				extension_check_outros();
			}
		},
		i(local) {
			if (current) return;

			for (let i = 0; i < each_value_1.length; i += 1) {
				extension_transition_in(each_blocks_1[i]);
			}

			for (let i = 0; i < each_value.length; i += 1) {
				extension_transition_in(each_blocks[i]);
			}

			current = true;
		},
		o(local) {
			each_blocks_1 = each_blocks_1.filter(Boolean);

			for (let i = 0; i < each_blocks_1.length; i += 1) {
				extension_transition_out(each_blocks_1[i]);
			}

			each_blocks = each_blocks.filter(Boolean);

			for (let i = 0; i < each_blocks.length; i += 1) {
				extension_transition_out(each_blocks[i]);
			}

			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div0);
			extension_destroy_each(each_blocks_1, detaching);
			if (detaching) extension_detach(t);
			if (detaching) extension_detach(div1);
			extension_destroy_each(each_blocks, detaching);
		}
	};
}

// (91:12) {#if editMode}
function extension_CanvasSummary_svelte_create_if_block_2(ctx) {
	let button;
	let fa;
	let current;
	let mounted;
	let dispose;
	fa = new extension_fa_svelte({ props: { icon: extension_faTimes/* faTimes */.GR } });

	function click_handler_1() {
		return /*click_handler_1*/ ctx[18](/*element*/ ctx[24]);
	}

	return {
		c() {
			button = extension_internal_element("button");
			extension_create_component(fa.$$.fragment);
			extension_attr(button, "class", "absolute top-0 right-0");
		},
		m(target, anchor) {
			extension_insert(target, button, anchor);
			extension_mount_component(fa, button, null);
			current = true;

			if (!mounted) {
				dispose = extension_listen(button, "click", click_handler_1);
				mounted = true;
			}
		},
		p(new_ctx, dirty) {
			ctx = new_ctx;
		},
		i(local) {
			if (current) return;
			extension_transition_in(fa.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(fa.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(button);
			extension_destroy_component(fa);
			mounted = false;
			dispose();
		}
	};
}

// (84:8) {#each numberData as element}
function extension_create_each_block_1(ctx) {
	let div;
	let summarynumberelement;
	let t0;
	let t1;
	let current;

	summarynumberelement = new extension_SummaryNumberElement_svelte({
			props: {
				data: /*element*/ ctx[24].data,
				name: /*element*/ ctx[24].name,
				editMode: /*editMode*/ ctx[6]
			}
		});

	let if_block = /*editMode*/ ctx[6] && extension_CanvasSummary_svelte_create_if_block_2(ctx);

	return {
		c() {
			div = extension_internal_element("div");
			extension_create_component(summarynumberelement.$$.fragment);
			t0 = extension_space();
			if (if_block) if_block.c();
			t1 = extension_space();
			extension_attr(div, "class", "relative");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			extension_mount_component(summarynumberelement, div, null);
			extension_append(div, t0);
			if (if_block) if_block.m(div, null);
			extension_append(div, t1);
			current = true;
		},
		p(ctx, dirty) {
			const summarynumberelement_changes = {};
			if (dirty & /*numberData*/ 512) summarynumberelement_changes.data = /*element*/ ctx[24].data;
			if (dirty & /*numberData*/ 512) summarynumberelement_changes.name = /*element*/ ctx[24].name;
			if (dirty & /*editMode*/ 64) summarynumberelement_changes.editMode = /*editMode*/ ctx[6];
			summarynumberelement.$set(summarynumberelement_changes);

			if (/*editMode*/ ctx[6]) {
				if (if_block) {
					if_block.p(ctx, dirty);

					if (dirty & /*editMode*/ 64) {
						extension_transition_in(if_block, 1);
					}
				} else {
					if_block = extension_CanvasSummary_svelte_create_if_block_2(ctx);
					if_block.c();
					extension_transition_in(if_block, 1);
					if_block.m(div, t1);
				}
			} else if (if_block) {
				extension_group_outros();

				extension_transition_out(if_block, 1, 1, () => {
					if_block = null;
				});

				extension_check_outros();
			}
		},
		i(local) {
			if (current) return;
			extension_transition_in(summarynumberelement.$$.fragment, local);
			extension_transition_in(if_block);
			current = true;
		},
		o(local) {
			extension_transition_out(summarynumberelement.$$.fragment, local);
			extension_transition_out(if_block);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			extension_destroy_component(summarynumberelement);
			if (if_block) if_block.d();
		}
	};
}

// (114:12) {#if editMode}
function extension_CanvasSummary_svelte_create_if_block_1(ctx) {
	let button;
	let fa;
	let current;
	let mounted;
	let dispose;
	fa = new extension_fa_svelte({ props: { icon: extension_faTimes/* faTimes */.GR } });

	function click_handler_2() {
		return /*click_handler_2*/ ctx[20](/*element*/ ctx[24]);
	}

	return {
		c() {
			button = extension_internal_element("button");
			extension_create_component(fa.$$.fragment);
			extension_attr(button, "class", "absolute top-0 right-0");
		},
		m(target, anchor) {
			extension_insert(target, button, anchor);
			extension_mount_component(fa, button, null);
			current = true;

			if (!mounted) {
				dispose = extension_listen(button, "click", click_handler_2);
				mounted = true;
			}
		},
		p(new_ctx, dirty) {
			ctx = new_ctx;
		},
		i(local) {
			if (current) return;
			extension_transition_in(fa.$$.fragment, local);
			current = true;
		},
		o(local) {
			extension_transition_out(fa.$$.fragment, local);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(button);
			extension_destroy_component(fa);
			mounted = false;
			dispose();
		}
	};
}

// (103:8) {#each chartData as element}
function extension_CanvasSummary_svelte_create_each_block(ctx) {
	let div;
	let summarylistelement;
	let t0;
	let t1;
	let current;

	summarylistelement = new extension_SummaryListElement_svelte({
			props: {
				table: /*$table*/ ctx[5],
				filteredTable: /*$filteredTable*/ ctx[10],
				canvasSpec: /*$canvasSpec*/ ctx[11],
				element: /*element*/ ctx[24],
				editMode: /*editMode*/ ctx[6]
			}
		});

	summarylistelement.$on("update", /*update_handler*/ ctx[19]);
	let if_block = /*editMode*/ ctx[6] && extension_CanvasSummary_svelte_create_if_block_1(ctx);

	return {
		c() {
			div = extension_internal_element("div");
			extension_create_component(summarylistelement.$$.fragment);
			t0 = extension_space();
			if (if_block) if_block.c();
			t1 = extension_space();
			extension_attr(div, "class", "relative");
		},
		m(target, anchor) {
			extension_insert(target, div, anchor);
			extension_mount_component(summarylistelement, div, null);
			extension_append(div, t0);
			if (if_block) if_block.m(div, null);
			extension_append(div, t1);
			current = true;
		},
		p(ctx, dirty) {
			const summarylistelement_changes = {};
			if (dirty & /*$table*/ 32) summarylistelement_changes.table = /*$table*/ ctx[5];
			if (dirty & /*$filteredTable*/ 1024) summarylistelement_changes.filteredTable = /*$filteredTable*/ ctx[10];
			if (dirty & /*$canvasSpec*/ 2048) summarylistelement_changes.canvasSpec = /*$canvasSpec*/ ctx[11];
			if (dirty & /*chartData*/ 256) summarylistelement_changes.element = /*element*/ ctx[24];
			if (dirty & /*editMode*/ 64) summarylistelement_changes.editMode = /*editMode*/ ctx[6];
			summarylistelement.$set(summarylistelement_changes);

			if (/*editMode*/ ctx[6]) {
				if (if_block) {
					if_block.p(ctx, dirty);

					if (dirty & /*editMode*/ 64) {
						extension_transition_in(if_block, 1);
					}
				} else {
					if_block = extension_CanvasSummary_svelte_create_if_block_1(ctx);
					if_block.c();
					extension_transition_in(if_block, 1);
					if_block.m(div, t1);
				}
			} else if (if_block) {
				extension_group_outros();

				extension_transition_out(if_block, 1, 1, () => {
					if_block = null;
				});

				extension_check_outros();
			}
		},
		i(local) {
			if (current) return;
			extension_transition_in(summarylistelement.$$.fragment, local);
			extension_transition_in(if_block);
			current = true;
		},
		o(local) {
			extension_transition_out(summarylistelement.$$.fragment, local);
			extension_transition_out(if_block);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div);
			extension_destroy_component(summarylistelement);
			if (if_block) if_block.d();
		}
	};
}

function extension_CanvasSummary_svelte_create_fragment(ctx) {
	let div1;
	let componentheader;
	let t0;
	let t1;
	let div0;
	let current_block_type_index;
	let if_block1;
	let div1_class_value;
	let current;

	componentheader = new extension_ComponentHeader_svelte({
			props: {
				title: 'Summary',
				description: /*widgetSpec*/ ctx[3].description,
				container: /*container*/ ctx[7],
				$$slots: { default: [extension_create_default_slot] },
				$$scope: { ctx }
			}
		});

	let if_block0 = /*editMode*/ ctx[6] && extension_create_if_block_3(ctx);
	const if_block_creators = [extension_CanvasSummary_svelte_create_if_block, extension_CanvasSummary_svelte_create_else_block];
	const if_blocks = [];

	function select_block_type(ctx, dirty) {
		if (CharacterData.length > 0 || /*numberData*/ ctx[9].length > 0) return 0;
		return 1;
	}

	current_block_type_index = select_block_type(ctx, -1);
	if_block1 = if_blocks[current_block_type_index] = if_block_creators[current_block_type_index](ctx);

	return {
		c() {
			div1 = extension_internal_element("div");
			extension_create_component(componentheader.$$.fragment);
			t0 = extension_space();
			if (if_block0) if_block0.c();
			t1 = extension_space();
			div0 = extension_internal_element("div");
			if_block1.c();
			extension_attr(div0, "class", "flex flex-col overflow-auto");

			extension_attr(div1, "class", div1_class_value = "flex flex-col p-2 " + (/*fullSize*/ ctx[4]
			? 'h-full'
			: extension_mapHeight(/*widgetSpec*/ ctx[3].height)));
		},
		m(target, anchor) {
			extension_insert(target, div1, anchor);
			extension_mount_component(componentheader, div1, null);
			extension_append(div1, t0);
			if (if_block0) if_block0.m(div1, null);
			extension_append(div1, t1);
			extension_append(div1, div0);
			if_blocks[current_block_type_index].m(div0, null);
			/*div0_binding*/ ctx[21](div0);
			current = true;
		},
		p(ctx, [dirty]) {
			const componentheader_changes = {};
			if (dirty & /*widgetSpec*/ 8) componentheader_changes.description = /*widgetSpec*/ ctx[3].description;
			if (dirty & /*container*/ 128) componentheader_changes.container = /*container*/ ctx[7];

			if (dirty & /*$$scope, editMode*/ 536870976) {
				componentheader_changes.$$scope = { dirty, ctx };
			}

			componentheader.$set(componentheader_changes);

			if (/*editMode*/ ctx[6]) {
				if (if_block0) {
					if_block0.p(ctx, dirty);

					if (dirty & /*editMode*/ 64) {
						extension_transition_in(if_block0, 1);
					}
				} else {
					if_block0 = extension_create_if_block_3(ctx);
					if_block0.c();
					extension_transition_in(if_block0, 1);
					if_block0.m(div1, t1);
				}
			} else if (if_block0) {
				extension_group_outros();

				extension_transition_out(if_block0, 1, 1, () => {
					if_block0 = null;
				});

				extension_check_outros();
			}

			let previous_block_index = current_block_type_index;
			current_block_type_index = select_block_type(ctx, dirty);

			if (current_block_type_index === previous_block_index) {
				if_blocks[current_block_type_index].p(ctx, dirty);
			} else {
				extension_group_outros();

				extension_transition_out(if_blocks[previous_block_index], 1, 1, () => {
					if_blocks[previous_block_index] = null;
				});

				extension_check_outros();
				if_block1 = if_blocks[current_block_type_index];

				if (!if_block1) {
					if_block1 = if_blocks[current_block_type_index] = if_block_creators[current_block_type_index](ctx);
					if_block1.c();
				} else {
					if_block1.p(ctx, dirty);
				}

				extension_transition_in(if_block1, 1);
				if_block1.m(div0, null);
			}

			if (!current || dirty & /*fullSize, widgetSpec*/ 24 && div1_class_value !== (div1_class_value = "flex flex-col p-2 " + (/*fullSize*/ ctx[4]
			? 'h-full'
			: extension_mapHeight(/*widgetSpec*/ ctx[3].height)))) {
				extension_attr(div1, "class", div1_class_value);
			}
		},
		i(local) {
			if (current) return;
			extension_transition_in(componentheader.$$.fragment, local);
			extension_transition_in(if_block0);
			extension_transition_in(if_block1);
			current = true;
		},
		o(local) {
			extension_transition_out(componentheader.$$.fragment, local);
			extension_transition_out(if_block0);
			extension_transition_out(if_block1);
			current = false;
		},
		d(detaching) {
			if (detaching) extension_detach(div1);
			extension_destroy_component(componentheader);
			if (if_block0) if_block0.d();
			if_blocks[current_block_type_index].d();
			/*div0_binding*/ ctx[21](null);
		}
	};
}

function extension_CanvasSummary_svelte_instance($$self, $$props, $$invalidate) {
	let elements;
	let numberData;
	let chartData;

	let $table,
		$$unsubscribe_table = extension_noop,
		$$subscribe_table = () => ($$unsubscribe_table(), $$unsubscribe_table = extension_subscribe(table, $$value => $$invalidate(5, $table = $$value)), table);

	let $filteredTable,
		$$unsubscribe_filteredTable = extension_noop,
		$$subscribe_filteredTable = () => ($$unsubscribe_filteredTable(), $$unsubscribe_filteredTable = extension_subscribe(filteredTable, $$value => $$invalidate(10, $filteredTable = $$value)), filteredTable);

	let $canvasSpec,
		$$unsubscribe_canvasSpec = extension_noop,
		$$subscribe_canvasSpec = () => ($$unsubscribe_canvasSpec(), $$unsubscribe_canvasSpec = extension_subscribe(canvasSpec, $$value => $$invalidate(11, $canvasSpec = $$value)), canvasSpec);

	$$self.$$.on_destroy.push(() => $$unsubscribe_table());
	$$self.$$.on_destroy.push(() => $$unsubscribe_filteredTable());
	$$self.$$.on_destroy.push(() => $$unsubscribe_canvasSpec());
	let { canvasSpec } = $$props;
	$$subscribe_canvasSpec();
	let { table } = $$props;
	$$subscribe_table();
	let { filteredTable } = $$props;
	$$subscribe_filteredTable();
	let { widgetSpec } = $$props;
	let { fullSize = false } = $$props;
	const dispatch = extension_createEventDispatcher();
	let editMode = false;
	let userSpecUpdate = false;
	let container;

	function updateSpecElements(newElements) {
		const newSpec = Object.assign(Object.assign({}, widgetSpec), { summaryElements: newElements });
		dispatch('specChanged', { spec: newSpec });
	}

	function removeElement(element) {
		$$invalidate(15, userSpecUpdate = true);
		let newElements = elements.filter(el => el.name !== element.name || el.data !== element.data);
		updateSpecElements(newElements);
	}

	function addElement(event) {
		$$invalidate(15, userSpecUpdate = true);
		let newElements = [...elements, event.detail.element];
		updateSpecElements(newElements);
	}

	function updateElement(element, oldElement) {
		$$invalidate(15, userSpecUpdate = true);
		let elementIndex = elements.findIndex(el => el.name === oldElement.name && el.data === oldElement.data);
		const newElements = elements.slice();
		newElements[elementIndex] = element;
		updateSpecElements(newElements);
	}

	const click_handler = () => $$invalidate(6, editMode = !editMode);
	const click_handler_1 = element => removeElement(element);
	const update_handler = event => updateElement(event.detail.element, event.detail.oldElement);
	const click_handler_2 = element => removeElement(element);

	function div0_binding($$value) {
		extension_binding_callbacks[$$value ? 'unshift' : 'push'](() => {
			container = $$value;
			$$invalidate(7, container);
		});
	}

	$$self.$$set = $$props => {
		if ('canvasSpec' in $$props) $$subscribe_canvasSpec($$invalidate(0, canvasSpec = $$props.canvasSpec));
		if ('table' in $$props) $$subscribe_table($$invalidate(1, table = $$props.table));
		if ('filteredTable' in $$props) $$subscribe_filteredTable($$invalidate(2, filteredTable = $$props.filteredTable));
		if ('widgetSpec' in $$props) $$invalidate(3, widgetSpec = $$props.widgetSpec);
		if ('fullSize' in $$props) $$invalidate(4, fullSize = $$props.fullSize);
	};

	$$self.$$.update = () => {
		if ($$self.$$.dirty & /*widgetSpec, userSpecUpdate, $table*/ 32808) {
			$: $$invalidate(16, elements = widgetSpec.summaryElements.length === 0 && !userSpecUpdate
			? extension_extractColumnElements($table)
			: widgetSpec.summaryElements);
		}

		if ($$self.$$.dirty & /*elements*/ 65536) {
			$: $$invalidate(9, numberData = elements.filter(row => typeof row.data === 'number'));
		}

		if ($$self.$$.dirty & /*elements*/ 65536) {
			$: $$invalidate(8, chartData = elements.filter(row => typeof row.data !== 'number'));
		}
	};

	return [
		canvasSpec,
		table,
		filteredTable,
		widgetSpec,
		fullSize,
		$table,
		editMode,
		container,
		chartData,
		numberData,
		$filteredTable,
		$canvasSpec,
		removeElement,
		addElement,
		updateElement,
		userSpecUpdate,
		elements,
		click_handler,
		click_handler_1,
		update_handler,
		click_handler_2,
		div0_binding
	];
}

class extension_CanvasSummary extends extension_SvelteComponent {
	constructor(options) {
		super();

		extension_init(this, options, extension_CanvasSummary_svelte_instance, extension_CanvasSummary_svelte_create_fragment, extension_safe_not_equal, {
			canvasSpec: 0,
			table: 1,
			filteredTable: 2,
			widgetSpec: 3,
			fullSize: 4
		});
	}
}

/* harmony default export */ const extension_CanvasSummary_svelte = (extension_CanvasSummary);
;// ./src/widget.ts
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */




class extension_CanvasSummaryModel extends extension_base_.DOMWidgetModel {
    defaults() {
        return Object.assign(Object.assign({}, super.defaults()), { _model_name: extension_CanvasSummaryModel.model_name, _model_module: extension_CanvasSummaryModel.model_module, _model_module_version: extension_CanvasSummaryModel.model_module_version, _view_name: extension_CanvasSummaryModel.view_name, _view_module: extension_CanvasSummaryModel.view_module, _view_module_version: extension_CanvasSummaryModel.view_module_version });
    }
}
extension_CanvasSummaryModel.serializers = extension_serializers;
extension_CanvasSummaryModel.model_name = 'CanvasSummaryModel';
extension_CanvasSummaryModel.model_module = extension_MODULE_NAME;
extension_CanvasSummaryModel.model_module_version = extension_MODULE_VERSION;
extension_CanvasSummaryModel.view_name = 'CanvasSummaryView'; // Set to null if no view
extension_CanvasSummaryModel.view_module = extension_MODULE_NAME; // Set to null if no view
extension_CanvasSummaryModel.view_module_version = extension_MODULE_VERSION;
class extension_CanvasSummaryView extends extension_base_.DOMWidgetView {
    render() {
        new extension_JupyterWidget_svelte({
            target: this.el,
            props: {
                model: this.model,
                widget: extension_CanvasSummary_svelte,
            },
        });
    }
}

;// ./src/index.ts
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */



;// ./src/extension.ts
/**
 * Copyright 2024 BetterWithData
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Entry point for the notebook bundle containing custom model definitions.
//
// Setup notebook base URL
//
// Some static assets may be required by the custom widget javascript. The base
// url for the notebook is not known at build time and is therefore computed
// dynamically.
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
window.__webpack_public_path__ =
    document.querySelector('body').getAttribute('data-base-url') +
        'nbextensions/canvas_summary';


})();

/******/ 	return __webpack_exports__;
/******/ })()
;
});;