/**
 * editor_plugin_src.js
 *
 * Copyright 2011, Moxiecode Systems AB
 * Released under LGPL License.
 *
 * License: http://tinymce.moxiecode.com/license
 * Contributing: http://tinymce.moxiecode.com/contributing
 */

(function () {
    tinymce.create('tinymce.plugins.AutolinkPlugin', {
        /**
         * Initializes the plugin, this will be executed after the plugin has been created.
         * This call is done before the editor instance has finished it's initialization so use the onInit event
         * of the editor instance to intercept that event.
         *
         * @param {tinymce.Editor} ed Editor instance that the plugin is initialized in.
         * @param {string} url Absolute URL to where the plugin is located.
         */

        init: function (ed, url) {
            var t = this;

            // Internet Explorer has built-in automatic linking
            if (tinyMCE.isIE)
                return;

            // Add a key down handler
            ed.onKeyDown.add(function (ed, e) {
                if (e.keyCode == 13)
                    return t.handleEnter(ed);
            });

            ed.onKeyPress.add(function (ed, e) {
                if (e.which == 41)
                    return t.handleEclipse(ed);
            });

            // Add a key up handler
            ed.onKeyUp.add(function (ed, e) {
                if (e.keyCode == 32)
                    return t.handleSpacebar(ed);
            });
        },

        handleEclipse: function (ed) {
            this.parseCurrentLine(ed, -1, '(', true);
        },

        handleSpacebar: function (ed) {
            this.parseCurrentLine(ed, 0, '', true);
        },

        handleEnter: function (ed) {
            this.parseCurrentLine(ed, -1, '', false);
        },

        parseCurrentLine: function (ed, end_offset, delimiter, goback) {
            var r, end, start, endContainer, bookmark, text, matches, prev, len;

            // We need at least five characters to form a URL,
            // hence, at minimum, five characters from the beginning of the line.
            r = ed.selection.getRng().cloneRange();
            if (r.startOffset < 5) {
                // During testing, the caret is placed inbetween two text nodes. 
                // The previous text node contains the URL.
                prev = r.endContainer.previousSibling;
                if (prev == null) {
                    if (r.endContainer.firstChild == null || r.endContainer.firstChild.nextSibling == null)
                        return;

                    prev = r.endContainer.firstChild.nextSibling;
                }
                len = prev.length;
                r.setStart(prev, len);
                r.setEnd(prev, len);

                if (r.endOffset < 5)
                    return;

                end = r.endOffset;
                endContainer = prev;
            } else {
                endContainer = r.endContainer;

                // Get a text node
                if (endContainer.nodeType != 3 && endContainer.firstChild) {
                    while (endContainer.nodeType != 3 && endContainer.firstChild)
                        endContainer = endContainer.firstChild;

                    r.setStart(endContainer, 0);
                    r.setEnd(endContainer, endContainer.nodeValue.length);
                }

                if (r.endOffset == 1)
                    end = 2;
                else
                    end = r.endOffset - 1 - end_offset;
            }

            start = end;

            do
            {
                // Move the selection one character backwards.
                r.setStart(endContainer, end - 2);
                r.setEnd(endContainer, end - 1);
                end -= 1;

                // Loop until one of the following is found: a blank space, &nbsp;, delimeter, (end-2) >= 0
            } while (r.toString() != ' ' && r.toString() != '' && r.toString().charCodeAt(0) != 160 && (end - 2) >= 0 && r.toString() != delimiter);

            if (r.toString() == delimiter || r.toString().charCodeAt(0) == 160) {
                r.setStart(endContainer, end);
                r.setEnd(endContainer, start);
                end += 1;
            } else if (r.startOffset == 0) {
                r.setStart(endContainer, 0);
                r.setEnd(endContainer, start);
            }
            else {
                r.setStart(endContainer, end);
                r.setEnd(endContainer, start);
            }

            text = r.toString();
            matches = text.match(/^(https?:\/\/|ssh:\/\/|ftp:\/\/|file:\/|www\.)(.+)$/i);

            if (matches) {
                if (matches[1] == 'www.') {
                    matches[1] = 'http://www.';
                }

                bookmark = ed.selection.getBookmark();

                ed.selection.setRng(r);
                tinyMCE.execCommand('createlink', false, matches[1] + matches[2]);
                ed.selection.moveToBookmark(bookmark);

                if (tinyMCE.isWebKit) {
                    // move the caret to its original position
                    ed.selection.collapse(false);
                    var max = Math.min(endContainer.length, start + 1);
                    r.setStart(endContainer, max);
                    r.setEnd(endContainer, max);
                    ed.selection.setRng(r);
                }
            }
        },

        /**
         * Returns information about the plugin as a name/value array.
         * The current keys are longname, author, authorurl, infourl and version.
         *
         * @return {Object} Name/value array containing information about the plugin.
         */
        getInfo: function () {
            return {
                longname: 'Autolink',
                author: 'Moxiecode Systems AB',
                authorurl: 'http://tinymce.moxiecode.com',
                infourl: 'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/autolink',
                version: tinymce.majorVersion + "." + tinymce.minorVersion
            };
        }
    });

    // Register plugin
    tinymce.PluginManager.add('autolink', tinymce.plugins.AutolinkPlugin);
})();
