/*
 * yui-ext 0.40
 * Copyright(c) 2006, Jack Slocum.
 */


YAHOO.ext.KeyMap=function(el,config,eventName){this.el=getEl(el);this.eventName=eventName||'keydown';this.bindings=[];if(config instanceof Array){for(var i=0,len=config.length;i<len;i++){this.addBinding(config[i]);}}else{this.addBinding(config);}
this.keyDownDelegate=YAHOO.ext.EventManager.wrap(this.handleKeyDown,this,true);this.enable();}
YAHOO.ext.KeyMap.prototype={addBinding:function(config){var keyCode=config.key,shift=config.shift,ctrl=config.ctrl,alt=config.alt,fn=config.fn,scope=config.scope;if(typeof keyCode=='string'){var ks=[];var keyString=keyCode.toUpperCase();for(var j=0,len=keyString.length;j<len;j++){ks.push(keyString.charCodeAt(j));}
keyCode=ks;}
var keyArray=keyCode instanceof Array;var handler=function(e){if((!shift||e.shiftKey)&&(!ctrl||e.ctrlKey)&&(!alt||e.altKey)){var k=e.getKey();if(keyArray){for(var i=0,len=keyCode.length;i<len;i++){if(keyCode[i]==k){fn.call(scope||window,k,e);return;}}}else{if(k==keyCode){fn.call(scope||window,k,e);}}}};this.bindings.push(handler);},handleKeyDown:function(e){if(this.enabled){var b=this.bindings;for(var i=0,len=b.length;i<len;i++){b[i](e);}}},isEnabled:function(){return this.enabled;},enable:function(){if(!this.enabled){this.el.on(this.eventName,this.keyDownDelegate);this.enabled=true;}},disable:function(){if(this.enabled){this.el.removeListener(this.eventName,this.keyDownDelegate);this.enabled=false;}}};