/*
 * script.aculo.us controls.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008
 *
 * Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
 *           (c) 2005-2007 Ivan Krstic (http://blogs.law.harvard.edu/ivan)
 *           (c) 2005-2007 Jon Tirsen (http://www.tirsen.com)
 * Contributors:
 *  Richard Livsey
 *  Rahul Bhargava
 *  Rob Wills
 * 
 * script.aculo.us is freely distributable under the terms of an MIT-style license.
 * For details, see the script.aculo.us web site: http://script.aculo.us/
 */
var Autocompleter={};Autocompleter.Base=Class.create({baseInitialize:function(B,C,A){B=$(B);this.element=B;this.update=$(C);this.hasFocus=false;this.changed=false;this.active=false;this.index=0;this.entryCount=0;this.oldElementValue=this.element.value;if(this.setOptions){this.setOptions(A)}else{this.options=A||{}}this.options.paramName=this.element.name;this.options.tokens=[" ","\n"];this.options.frequency=0.4;this.options.minChars=3;this.options.onShow=function(D,E){Element.show(E)};this.options.onHide=function(D,E){Element.hide(E)};this.observer=null;this.element.setAttribute("autocomplete","off");Event.observe(this.element,"blur",this.onBlur.bindAsEventListener(this));Event.observe(this.element,"keydown",this.onKeyPress.bindAsEventListener(this))},show:function(){if(Element.getStyle(this.update,"display")=="none"){this.options.onShow(this.element,this.update)}},hide:function(){if(Element.getStyle(this.update,"display")!="none"){this.options.onHide(this.element,this.update)}},onKeyPress:function(A){if(this.active){switch(A.keyCode){case Event.KEY_TAB:case Event.KEY_RETURN:this.selectEntry();Event.stop(A);case Event.KEY_ESC:this.hide();this.active=false;Event.stop(A);return ;case Event.KEY_LEFT:case Event.KEY_RIGHT:return ;case Event.KEY_UP:this.markPrevious();this.render();Event.stop(A);return ;case Event.KEY_DOWN:this.markNext();this.render();Event.stop(A);return }}else{if(A.keyCode==Event.KEY_TAB||A.keyCode==Event.KEY_RETURN||(Prototype.Browser.WebKit>0&&A.keyCode==0)){return }}this.changed=true;this.hasFocus=true;if(this.observer){clearTimeout(this.observer)}this.observer=setTimeout(this.onObserverEvent.bind(this),this.options.frequency*1000)},activate:function(){this.changed=false;this.hasFocus=true;this.getUpdatedChoices()},onHover:function(B){var A=Event.findElement(B,"LI");if(this.index!=A.autocompleteIndex){this.index=A.autocompleteIndex;this.render()}Event.stop(B)},onClick:function(B){var A=Event.findElement(B,"LI");this.index=A.autocompleteIndex;this.selectEntry();this.hide()},onBlur:function(A){setTimeout(this.hide.bind(this),250);this.hasFocus=false;this.active=false},render:function(){if(this.entryCount>0){for(var A=0;A<this.entryCount;A++){if(this.index==A){Element.addClassName(this.getEntry(A),"selected")}else{Element.removeClassName(this.getEntry(A),"selected")}}if(this.hasFocus){this.show();this.active=true}}else{this.active=false;this.hide()}},markPrevious:function(){if(this.index>0){this.index--}else{this.index=this.entryCount-1}},markNext:function(){if(this.index<this.entryCount-1){this.index++}else{this.index=0}},getEntry:function(A){return this.update.firstChild.childNodes[A]},getCurrentEntry:function(){return this.getEntry(this.index)},selectEntry:function(){this.active=false;this.updateElement(this.getCurrentEntry())},updateElement:function(F){var D="";if(this.options.select){var A=$(F).select("."+this.options.select)||[];if(A.length>0){D=Element.collectTextNodes(A[0],this.options.select)}}else{D=Element.collectTextNodesIgnoreClass(F,"informal")}var C=this.getTokenBounds();if(C[0]!=-1){var E=this.element.value.substr(0,C[0]);var B=this.element.value.substr(C[0]).match(/^\s+/);if(B){E+=B[0]}this.element.value=E+D+this.element.value.substr(C[1])+" "}else{this.element.value=D+" "}this.oldElementValue=this.element.value;this.element.focus()},updateChoices:function(D){if(!this.changed&&this.hasFocus){this.update.innerHTML=D;Element.cleanWhitespace(this.update);var C=this.update.down();if(C){Element.cleanWhitespace(C)}if(this.update.firstChild&&this.update.down().childNodes){this.entryCount=this.update.down().childNodes.length;for(var A=0;A<this.entryCount;A++){var B=this.getEntry(A);B.autocompleteIndex=A;this.addObservers(B)}}else{this.entryCount=0}this.index=0;if(this.entryCount==1&&this.options.autoSelect){this.selectEntry();this.hide()}else{this.render()}}},addObservers:function(A){Event.observe(A,"mouseover",this.onHover.bindAsEventListener(this));Event.observe(A,"click",this.onClick.bindAsEventListener(this))},onObserverEvent:function(){this.changed=false;this.tokenBounds=null;if(this.getToken().length>=this.options.minChars){this.getUpdatedChoices()}else{this.active=false;this.hide()}this.oldElementValue=this.element.value},getToken:function(){var A=this.getTokenBounds();return this.element.value.substring(A[0],A[1]).strip()},getTokenBounds:function(){if(this.tokenBounds){return this.tokenBounds}var E=this.element.value;if(E.strip().empty()){return[-1,0]}var F=arguments.callee.getFirstDifferencePos(E,this.oldElementValue);var H=(F==this.oldElementValue.length?1:0);var D=-1,C=E.length;var G;for(var B=0,A=this.options.tokens.length;B<A;++B){G=E.lastIndexOf(this.options.tokens[B],F+H-1);if(G>D){D=G}G=E.indexOf(this.options.tokens[B],F+H);if(-1!=G&&G<C){C=G}}return(this.tokenBounds=[D+1,C])}});Autocompleter.Base.prototype.getTokenBounds.getFirstDifferencePos=function(C,A){var D=Math.min(C.length,A.length);for(var B=0;B<D;++B){if(C[B]!=A[B]){return B}}return D};Ajax.Autocompleter=Class.create(Autocompleter.Base,{initialize:function(C,D,B,A){this.baseInitialize(C,D,A);this.options.asynchronous=true;this.options.onComplete=this.onComplete.bind(this);this.url=B},getUpdatedChoices:function(){this.options.parameters=encodeURIComponent(this.options.paramName)+"="+encodeURIComponent(this.getToken());(new Ajax.Request(this.url,this.options))},onComplete:function(A){this.updateChoices(A.responseText)}});Element.collectTextNodes=function(A){return $A($(A).childNodes).collect(function(B){return(B.nodeType==3?B.nodeValue:(B.hasChildNodes()?Element.collectTextNodes(B):""))}).flatten().join("")};Element.collectTextNodesIgnoreClass=function(A,B){return $A($(A).childNodes).collect(function(C){return(C.nodeType==3?C.nodeValue:((C.hasChildNodes()&&!Element.hasClassName(C,B))?Element.collectTextNodesIgnoreClass(C,B):""))}).flatten().join("")};