/**
 * editor_plugin_src.js
 *
 * Copyright 2009, Moxiecode Systems AB
 * Released under LGPL License.
 *
 * License: http://tinymce.moxiecode.com/license
 * Contributing: http://tinymce.moxiecode.com/contributing
 */

(function () {
    /**
     * Auto Resize
     *
     * This plugin automatically resizes the content area to fit its content height.
     * It will retain a minimum height, which is the height of the content area when
     * it's initialized.
     */
    tinymce.create('tinymce.plugins.AutoResizePlugin', {
        /**
         * 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, oldSize = 0;

            if (ed.getParam('fullscreen_is_enabled'))
                return;

            /**
             * This method gets executed each time the editor needs to resize.
             */
            function resize() {
                var d = ed.getDoc(), b = d.body, de = d.documentElement, DOM = tinymce.DOM, resizeHeight = t.autoresize_min_height, myHeight;

                // Get height differently depending on the browser used
                myHeight = tinymce.isIE ? b.scrollHeight : d.body.offsetHeight;

                // Don't make it smaller than the minimum height
                if (myHeight > t.autoresize_min_height)
                    resizeHeight = myHeight;

                // If a maximum height has been defined don't exceed this height
                if (t.autoresize_max_height && myHeight > t.autoresize_max_height) {
                    resizeHeight = t.autoresize_max_height;
                    ed.getBody().style.overflowY = "auto";
                } else
                    ed.getBody().style.overflowY = "hidden";

                // Resize content element
                if (resizeHeight !== oldSize) {
                    DOM.setStyle(DOM.get(ed.id + '_ifr'), 'height', resizeHeight + 'px');
                    oldSize = resizeHeight;
                }

                // if we're throbbing, we'll re-throb to match the new size
                if (t.throbbing) {
                    ed.setProgressState(false);
                    ed.setProgressState(true);
                }
            };

            t.editor = ed;

            // Define minimum height
            t.autoresize_min_height = parseInt(ed.getParam('autoresize_min_height', ed.getElement().offsetHeight));

            // Define maximum height	
            t.autoresize_max_height = parseInt(ed.getParam('autoresize_max_height', 0));

            // Add padding at the bottom for better UX
            ed.onInit.add(function (ed) {
                ed.dom.setStyle(ed.getBody(), 'paddingBottom', ed.getParam('autoresize_bottom_margin', 50) + 'px');
            });

            // Add appropriate listeners for resizing content area
            ed.onChange.add(resize);
            ed.onSetContent.add(resize);
            ed.onPaste.add(resize);
            ed.onKeyUp.add(resize);
            ed.onPostRender.add(resize);

            if (ed.getParam('autoresize_on_init', true)) {
                // Things to do when the editor is ready
                ed.onInit.add(function (ed, l) {
                    // Show throbber until content area is resized properly
                    ed.setProgressState(true);
                    t.throbbing = true;

                    // Hide scrollbars
                    ed.getBody().style.overflowY = "hidden";
                });

                ed.onLoadContent.add(function (ed, l) {
                    resize();

                    // Because the content area resizes when its content CSS loads,
                    // and we can't easily add a listener to its onload event,
                    // we'll just trigger a resize after a short loading period
                    setTimeout(function () {
                        resize();

                        // Disable throbber
                        ed.setProgressState(false);
                        t.throbbing = false;
                    }, 1250);
                });
            }

            // Register the command so that it can be invoked by using tinyMCE.activeEditor.execCommand('mceExample');
            ed.addCommand('mceAutoResize', resize);
        },

        /**
         * 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: 'Auto Resize',
                author: 'Moxiecode Systems AB',
                authorurl: 'http://tinymce.moxiecode.com',
                infourl: 'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/autoresize',
                version: tinymce.majorVersion + "." + tinymce.minorVersion
            };
        }
    });

    // Register plugin
    tinymce.PluginManager.add('autoresize', tinymce.plugins.AutoResizePlugin);
})();
