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FCKeditor/editor/_source/classes/fckiecleanup.js

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+/*
+ * FCKeditor - The text editor for Internet - http://www.fckeditor.net
+ * Copyright (C) 2003-2007 Frederico Caldeira Knabben
+ *
+ * == BEGIN LICENSE ==
+ *
+ * Licensed under the terms of any of the following licenses at your
+ * choice:
+ *
+ *  - GNU General Public License Version 2 or later (the "GPL")
+ *    http://www.gnu.org/licenses/gpl.html
+ *
+ *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
+ *    http://www.gnu.org/licenses/lgpl.html
+ *
+ *  - Mozilla Public License Version 1.1 or later (the "MPL")
+ *    http://www.mozilla.org/MPL/MPL-1.1.html
+ *
+ * == END LICENSE ==
+ *
+ * FCKIECleanup Class: a generic class used as a tool to remove IE leaks.
+ */
+
+var	FCKIECleanup = function( attachWindow )
+{
+	// If the attachWindow already have a cleanup object, just use that one.
+	if ( attachWindow._FCKCleanupObj )
+		this.Items = attachWindow._FCKCleanupObj.Items ;
+	else
+	{
+		this.Items = new Array() ;
+
+		attachWindow._FCKCleanupObj = this ;
+		FCKTools.AddEventListenerEx( attachWindow, 'unload', FCKIECleanup_Cleanup ) ;
+//		attachWindow.attachEvent( 'onunload', FCKIECleanup_Cleanup ) ;
+	}
+}
+
+FCKIECleanup.prototype.AddItem = function( dirtyItem, cleanupFunction )
+{
+	this.Items.push( [ dirtyItem, cleanupFunction ] ) ;
+}
+
+function FCKIECleanup_Cleanup()
+{
+	if ( !this._FCKCleanupObj || !window.FCKUnloadFlag )
+		return ;
+
+	var aItems = this._FCKCleanupObj.Items ;
+
+	while ( aItems.length > 0 )
+	{
+
+		// It is important to remove from the end to the beginning (pop()),
+		// because of the order things get created in the editor. In the code,
+		// elements in deeper position in the DOM are placed at the end of the
+		// cleanup function, so we must cleanup then first, otherwise IE could
+		// throw some crazy memory errors (IE bug).
+		var oItem = aItems.pop() ;
+		if ( oItem )
+			oItem[1].call( oItem[0] ) ;
+	}
+
+	this._FCKCleanupObj = null ;
+
+	if ( CollectGarbage )
+		CollectGarbage() ;
+}