/* EventCache Version 1.0
   Copyright 2005 Mark Wubben

   Provides a way for automagically removing events from nodes and thus preventing memory leakage.
   See <http://novemberborn.net/javascript/event-cache> for more information.

   This software is licensed under the CC-GNU LGPL <http://creativecommons.org/licenses/LGPL/2.1/>
*/

/* Implement array.push for browsers which don't support it natively.
   Please remove this if it's already in other code */
if(Array.prototype.push == null){
   Array.prototype.push = function(){
           for(var i = 0; i < arguments.length; i++){
                   this[this.length] = arguments[i];
           };
           return this.length;
   };
};

/* Event Cache uses an anonymous function to create a hidden scope chain.
   This is to prevent scoping issues. */
var EventCache = function(){
   var listEvents = [];

   return {
           listEvents : listEvents,

           add : function(node, sEventName, fHandler, bCapture){
                   listEvents.push(arguments);
           },

           flush : function(){
                   var i, item;
                   for(i = listEvents.length - 1; i >= 0; i = i - 1){
                           item = listEvents[i];

                           if(item[0].removeEventListener){
                                   item[0].removeEventListener(item[1], item[2], item[3]);
                           };

                           /* From this point on we need the event names to be prefixed with 'on" */
                           if(item[1].substring(0, 2) != "on"){
                                   item[1] = "on" + item[1];
                           };

                           if(item[0].detachEvent){
                                   item[0].detachEvent(item[1], item[2]);
                           };

                           item[0][item[1]] = null;
                   };
           }
   };
}();