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/**
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 * editor_plugin_src.js
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 *
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 * Copyright 2009, Moxiecode Systems AB
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 * Released under LGPL License.
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 *
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 * License: http://tinymce.moxiecode.com/license
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 * Contributing: http://tinymce.moxiecode.com/contributing
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 */
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(function() {
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	/**
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	 * Auto Resize
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	 *
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	 * This plugin automatically resizes the content area to fit its content height.
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	 * It will retain a minimum height, which is the height of the content area when
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	 * it's initialized.
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	 */
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	tinymce.create('tinymce.plugins.AutoResizePlugin', {
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		/**
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		 * Initializes the plugin, this will be executed after the plugin has been created.
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		 * This call is done before the editor instance has finished it's initialization so use the onInit event
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		 * of the editor instance to intercept that event.
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		 *
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		 * @param {tinymce.Editor} ed Editor instance that the plugin is initialized in.
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		 * @param {string} url Absolute URL to where the plugin is located.
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		 */
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		init : function(ed, url) {
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			var t = this, oldSize = 0;
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			if (ed.getParam('fullscreen_is_enabled'))
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				return;
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			/**
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			 * This method gets executed each time the editor needs to resize.
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			 */
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			function resize() {
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				var d = ed.getDoc(), b = d.body, de = d.documentElement, DOM = tinymce.DOM, resizeHeight = t.autoresize_min_height, myHeight;
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				// Get height differently depending on the browser used
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				myHeight = tinymce.isIE ? b.scrollHeight : d.body.offsetHeight;
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				// Don't make it smaller than the minimum height
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				if (myHeight > t.autoresize_min_height)
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					resizeHeight = myHeight;
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				// If a maximum height has been defined don't exceed this height
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				if (t.autoresize_max_height && myHeight > t.autoresize_max_height) {
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					resizeHeight = t.autoresize_max_height;
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					ed.getBody().style.overflowY = "auto";
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				} else
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					ed.getBody().style.overflowY = "hidden";
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				// Resize content element
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				if (resizeHeight !== oldSize) {
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					DOM.setStyle(DOM.get(ed.id + '_ifr'), 'height', resizeHeight + 'px');
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					oldSize = resizeHeight;
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				}
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				// if we're throbbing, we'll re-throb to match the new size
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				if (t.throbbing) {
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					ed.setProgressState(false);
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					ed.setProgressState(true);
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				}
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			};
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			t.editor = ed;
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			// Define minimum height
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			t.autoresize_min_height = parseInt( ed.getParam('autoresize_min_height', ed.getElement().offsetHeight) );
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			// Define maximum height
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			t.autoresize_max_height = parseInt( ed.getParam('autoresize_max_height', 0) );
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			// Add padding at the bottom for better UX
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			ed.onInit.add(function(ed){
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				ed.dom.setStyle(ed.getBody(), 'paddingBottom', ed.getParam('autoresize_bottom_margin', 50) + 'px');
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			});
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			// Add appropriate listeners for resizing content area
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			ed.onChange.add(resize);
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			ed.onSetContent.add(resize);
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			ed.onPaste.add(resize);
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			ed.onKeyUp.add(resize);
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			ed.onPostRender.add(resize);
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			if (ed.getParam('autoresize_on_init', true)) {
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				// Things to do when the editor is ready
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				ed.onInit.add(function(ed, l) {
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					// Show throbber until content area is resized properly
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					ed.setProgressState(true);
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					t.throbbing = true;
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					// Hide scrollbars
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					ed.getBody().style.overflowY = "hidden";
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				});
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				ed.onLoadContent.add(function(ed, l) {
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					resize();
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					// Because the content area resizes when its content CSS loads,
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					// and we can't easily add a listener to its onload event,
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					// we'll just trigger a resize after a short loading period
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					setTimeout(function() {
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						resize();
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						// Disable throbber
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						ed.setProgressState(false);
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						t.throbbing = false;
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					}, 1250);
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				});
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			}
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			// Register the command so that it can be invoked by using tinyMCE.activeEditor.execCommand('mceExample');
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			ed.addCommand('mceAutoResize', resize);
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		},
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		/**
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		 * Returns information about the plugin as a name/value array.
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		 * The current keys are longname, author, authorurl, infourl and version.
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		 *
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		 * @return {Object} Name/value array containing information about the plugin.
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		 */
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		getInfo : function() {
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			return {
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				longname : 'Auto Resize',
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				author : 'Moxiecode Systems AB',
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				authorurl : 'http://tinymce.moxiecode.com',
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				infourl : 'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/autoresize',
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				version : tinymce.majorVersion + "." + tinymce.minorVersion
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			};
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		}
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	});
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	// Register plugin
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	tinymce.PluginManager.add('autoresize', tinymce.plugins.AutoResizePlugin);
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})();