var Autocomplete=function(el,options){this.EVENT_SELECTED="autocomplete:selected";this.el=$(el);this.id=this.el.identify();this.el.setAttribute("autocomplete","off");this.suggestions=[];this.data=[];this.badQueries=[];this.selectedIndex=-1;this.currentValue=this.el.value;this.intervalId=0;this.cachedResponse=[];this.instanceId=null;this.onChangeInterval=null;this.ignoreValueChange=false;this.serviceUrl=options.serviceUrl;
this.lastValue=null;this.internalParents=null;this.options={autoSubmit:false,minChars:1,maxHeight:300,deferRequestBy:0,width:0,container:null,parentId:null,hint:null};if(options){Object.extend(this.options,options)}if(Autocomplete.isDomLoaded){this.initialize()}else{Event.observe(window,"load",function(){this.initialize()}.bind(this),false)}};Autocomplete.instances=[];Autocomplete.isDomLoaded=false;
Autocomplete.getInstance=function(id){var instances=Autocomplete.instances;var i=instances.length;while(i--){if(instances[i].id===id){return instances[i]}}};Autocomplete.highlight=function(value,re){return value.replace(re,function(match){return"<strong>"+match+"</strong>"})};Autocomplete.prototype={killerFn:null,initialize:function(){var me=this;this.killerFn=function(e){if(!$(Event.element(e)).up(".autocomplete")){this.adjustSelected(me);
me.killSuggestions();me.disableKillerFn()}}.bindAsEventListener(this);if(!this.options.width){this.options.width=this.el.getWidth()}var div=new Element("div",{style:"position:absolute;"});div.update('<div class="autocomplete-w1"><div class="autocomplete-w2"><div class="autocomplete" id="Autocomplete_'+this.id+'" style="display:none; width:'+this.options.width+'px;"></div></div></div>');this.options.container=$(this.options.container);
if(this.options.container){this.options.container.appendChild(div);this.fixPosition=function(){}}else{document.body.appendChild(div)}this.mainContainerId=div.identify();this.container=$("Autocomplete_"+this.id);this.fixPosition();Event.observe(this.el,window.opera?"keypress":"keydown",this.onKeyPress.bind(this));Event.observe(this.el,"keyup",this.onKeyUp.bind(this));Event.observe(this.el,"blur",this.enableKillerFn.bind(this));
Event.observe(this.el,"focus",this.fixPosition.bind(this));Event.observe(this.el,"change",this.onChange.bind(this));Event.observe(this.el,"click",this.onClickEvent.bind(this));this.container.setStyle({maxHeight:this.options.maxHeight+"px"});this.instanceId=Autocomplete.instances.push(this)-1},reset:function(){this.suggestions=[];this.data=[];this.badQueries=[];this.selectedIndex=-1;this.cachedResponse=[]
},fixPosition:function(){var offset=this.el.cumulativeOffset();$(this.mainContainerId).setStyle({top:(offset.top+this.el.getHeight())+"px",left:offset.left+"px"})},enableKillerFn:function(){Event.observe(document.body,"click",this.killerFn)},disableKillerFn:function(){Event.stopObserving(document.body,"click",this.killerFn)},killSuggestions:function(){this.stopKillSuggestions();this.intervalId=window.setInterval(function(){this.hide();
this.stopKillSuggestions()}.bind(this),300)},stopKillSuggestions:function(){window.clearInterval(this.intervalId)},onChange:function(e){if(typeof(this.currentValue)=="undefined"){return}var found=false;this.suggestions.each(function(tab,index){if(tab.toLowerCase()==this.currentValue.toLowerCase()){this.onSelect(index);found=true}}.bind(this));if(!found){this.el.value=""}},onClickEvent:function(e){this.lastValue=this.el.value;
this.el.value="";if(this.options.hint!=null&&this.options.hint!=""){this.addUnselectableSuggestion(this.options.hint)}},onKeyPress:function(e){if(!this.enabled){return}switch(e.keyCode){case Event.KEY_ESC:this.el.value=this.currentValue;this.hide();break;case Event.KEY_TAB:case Event.KEY_RETURN:if(this.selectedIndex===-1){this.hide();return}this.select(this.selectedIndex);if(e.keyCode===Event.KEY_TAB){return
}break;case Event.KEY_UP:this.moveUp();break;case Event.KEY_DOWN:this.moveDown();break;default:return}Event.stop(e)},onKeyUp:function(e){switch(e.keyCode){case Event.KEY_UP:case Event.KEY_DOWN:return}clearInterval(this.onChangeInterval);if(this.currentValue!==this.el.value){if(this.options.deferRequestBy>0){this.onChangeInterval=setInterval((function(){this.onValueChange()}).bind(this),this.options.deferRequestBy)
}else{this.onValueChange()}}},onValueChange:function(){clearInterval(this.onChangeInterval);this.currentValue=this.el.value;this.selectedIndex=-1;if(this.ignoreValueChange){this.ignoreValueChange=false}if(this.currentValue===""||this.currentValue.length<this.options.minChars){this.hide()}else{this.getSuggestions()}},getSuggestions:function(){var cr=this.cachedResponse[this.currentValue];if(cr&&Object.isArray(cr.suggestions)){this.suggestions=cr.suggestions;
this.data=cr.data;this.suggest()}else{if(!this.isBadQuery(this.currentValue)){var params={query:this.currentValue};if(this.options.parentId!=null){params={query:this.currentValue,parentValue:this.options.parentId}}this.addUnselectableSuggestion("","loader");new Ajax.Request(this.serviceUrl,{parameters:params,onComplete:this.processResponse.bind(this),method:"get"})}}},isBadQuery:function(q){var i=this.badQueries.length;
while(i--){if(q.indexOf(this.badQueries[i])===0){return true}}return false},hide:function(){this.enabled=false;this.selectedIndex=-1;this.container.hide()},suggest:function(){if(this.suggestions.length===0){this.hide();return}var content=[];var re=new RegExp("\\b"+this.currentValue.match(/\w+/g).join("|\\b"),"gi");this.suggestions.each(function(value,i){content.push((this.selectedIndex===i?'<div class="selected"':"<div"),' title="',value,'" onclick="Autocomplete.instances[',this.instanceId,"].select(",i,');" onmouseover="Autocomplete.instances[',this.instanceId,"].activate(",i,');">',Autocomplete.highlight(value,re),"</div>")
}.bind(this));this.enabled=true;this.container.update(content.join("")).show()},addUnselectableSuggestion:function(text,classname){if(typeof(classname)=="undefined"){classname=""}else{classname=' class="'+classname+'" '}var content=[];content.push("<div "+classname+'title="'+text+'">'+text+"</div>");this.container.update(content.join("")).show()},processResponse:function(xhr){var response;try{response=xhr.responseText.evalJSON();
if(!Object.isArray(response.data)){response.data=[]}}catch(err){return}this.cachedResponse[response.query]=response;if(response.suggestions.length===0){this.badQueries.push(response.query)}if(response.query===this.currentValue){this.suggestions=response.suggestions;this.data=response.data;if(response.internalParents){this.internalParents=response.internalParents}this.suggest()}},activate:function(index){var divs=this.container.childNodes;
var activeItem;if(this.selectedIndex!==-1&&divs.length>this.selectedIndex){divs[this.selectedIndex].className=""}this.selectedIndex=index;if(this.selectedIndex!==-1&&divs.length>this.selectedIndex){activeItem=divs[this.selectedIndex];activeItem.className="selected"}return activeItem},deactivate:function(div,index){div.className="";if(this.selectedIndex===index){this.selectedIndex=-1}},select:function(i){this.el.fire(this.EVENT_SELECTED,"");
var index=this.verifyParents(i);i=(index!=null)?index:i;var selectedValue=this.suggestions[i];if(selectedValue){this.el.value=selectedValue;this.currentValue=selectedValue;if(this.options.autoSubmit&&this.el.form){this.el.form.submit()}this.ignoreValueChange=true;this.hide();this.onSelect(i)}},verifyParents:function(i){if(this.internalParents==null||Object.isUndefined(this.internalParents[this.data[i]])){return null
}var parentData=this.internalParents[this.data[i]];if(this.getIndexById(parentData.parentId)!=null){return null}this.suggestions.push(parentData.name);this.data.push(parentData.parentId);var i=this.getIndexById(parentData.parentId);return i},moveUp:function(){if(this.selectedIndex===-1){return}if(this.selectedIndex===0){this.container.childNodes[0].className="";this.selectedIndex=-1;this.el.value=this.currentValue;
return}this.adjustScroll(this.selectedIndex-1)},moveDown:function(){if(this.selectedIndex===(this.suggestions.length-1)){return}this.adjustScroll(this.selectedIndex+1)},adjustScroll:function(i){var container=this.container;var activeItem=this.activate(i);var offsetTop=activeItem.offsetTop;var upperBound=container.scrollTop;var lowerBound=upperBound+this.options.maxHeight-25;if(offsetTop<upperBound){container.scrollTop=offsetTop
}else{if(offsetTop>lowerBound){container.scrollTop=offsetTop-this.options.maxHeight+25}}this.el.value=this.suggestions[i]},onSelect:function(i){(this.options.onSelect||Prototype.emptyFunction)(this.suggestions[i],this.data[i])},getIndexById:function(index){var found=null;this.data.each(function(value,i){if(value==index){found=i}}.bind(this));return found},adjustSelected:function(me){if(this.suggestions.length==2){this.el.fire(this.EVENT_SELECTED,"");
me.el.value=this.suggestions[1];return}if(me.lastValue!=null&&me.el.value==""){this.el.fire(this.EVENT_SELECTED,"");me.el.value=me.lastValue;return}}};Event.observe(document,"dom:loaded",function(){Autocomplete.isDomLoaded=true},false);