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FCKeditor/editor/_source/classes/fckevents.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 ==
+ *
+ * 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 ;
+}