/*

 * 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 ==

 *

 * FCKEvents Class: used to handle events is a advanced way.

 */



var FCKEvents = function( eventsOwner )

{

	this.Owner = eventsOwner ;

	this._RegisteredEvents = new Object() ;

}



FCKEvents.prototype.AttachEvent = function( eventName, functionPointer )

{

	var aTargets ;



	if ( !( aTargets = this._RegisteredEvents[ eventName ] ) )

		this._RegisteredEvents[ eventName ] = [ functionPointer ] ;

	else

	{

		// Check that the event handler isn't already registered with the same listener

		// It doesn't detect function pointers belonging to an object (at least in Gecko)

		if ( aTargets.IndexOf( functionPointer ) == -1 )

			aTargets.push( functionPointer ) ;

	}

}



FCKEvents.prototype.FireEvent = function( eventName, params )

{

	var bReturnValue = true ;



	var oCalls = this._RegisteredEvents[ eventName ] ;



	if ( oCalls )

	{

		for ( var i = 0 ; i < oCalls.length ; i++ )

		{

			try

			{

				bReturnValue = ( oCalls[ i ]( this.Owner, params ) && bReturnValue ) ;

			}

			catch(e)

			{

				// Ignore the following error. It may happen if pointing to a

				// script not anymore available (#934):

				// -2146823277 = Can't execute code from a freed script

				if ( e.number != -2146823277 )

					throw e ;

			}

		}

	}



	return bReturnValue ;

}