/source/Plug-in/fck/editor/_source/classes/fckevents.js

 1/*
 2 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 3 * Copyright (C) 2003-2007 Frederico Caldeira Knabben
 4 *
 5 * == BEGIN LICENSE ==
 6 *
 7 * Licensed under the terms of any of the following licenses at your
 8 * choice:
 9 *
10 *  - GNU General Public License Version 2 or later (the "GPL")
11 *    http://www.gnu.org/licenses/gpl.html
12 *
13 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
14 *    http://www.gnu.org/licenses/lgpl.html
15 *
16 *  - Mozilla Public License Version 1.1 or later (the "MPL")
17 *    http://www.mozilla.org/MPL/MPL-1.1.html
18 *
19 * == END LICENSE ==
20 *
21 * FCKEvents Class: used to handle events is a advanced way.
22 */
23
24var FCKEvents = function( eventsOwner )
25{
26	this.Owner = eventsOwner ;
27	this._RegisteredEvents = new Object() ;
28}
29
30FCKEvents.prototype.AttachEvent = function( eventName, functionPointer )
31{
32	var aTargets ;
33
34	if ( !( aTargets = this._RegisteredEvents[ eventName ] ) )
35		this._RegisteredEvents[ eventName ] = [ functionPointer ] ;
36	else
37	{
38		// Check that the event handler isn't already registered with the same listener
39		// It doesn't detect function pointers belonging to an object (at least in Gecko)
40		if ( aTargets.IndexOf( functionPointer ) == -1 )
41			aTargets.push( functionPointer ) ;
42	}
43}
44
45FCKEvents.prototype.FireEvent = function( eventName, params )
46{
47	var bReturnValue = true ;
48
49	var oCalls = this._RegisteredEvents[ eventName ] ;
50
51	if ( oCalls )
52	{
53		for ( var i = 0 ; i < oCalls.length ; i++ )
54		{
55			try
56			{
57				bReturnValue = ( oCalls[ i ]( this.Owner, params ) && bReturnValue ) ;
58			}
59			catch(e)
60			{
61				// Ignore the following error. It may happen if pointing to a
62				// script not anymore available (#934):
63				// -2146823277 = Can't execute code from a freed script
64				if ( e.number != -2146823277 )
65					throw e ;
66			}
67		}
68	}
69
70	return bReturnValue ;
71}