/*

 * FCKeditor - The text editor for Internet - http://www.fckeditor.net

 * Copyright (C) 2003-2009 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 || ( FCKConfig.MsWebBrowserControlCompat && !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() ;

}