YAHOO.namespace("extension");
YAHOO.extension.Carousel=function(carouselElementID,carouselCfg){this.init(carouselElementID,carouselCfg)
};
YAHOO.extension.Carousel.prototype={UNBOUNDED_SIZE:1000000,init:function(carouselElementID,carouselCfg){var oThis=this;
this.getCarouselItem=this.getItem;
var carouselListClass="carousel-list";
var carouselClipRegionClass="carousel-clip-region";
var carouselNextClass="carousel-next";
var carouselPrevClass="carousel-prev";
this._carouselElemID=carouselElementID;
this.carouselElem=YAHOO.util.Dom.get(carouselElementID);
this._prevEnabled=true;
this._nextEnabled=true;
this.cfg=new YAHOO.util.Config(this);
this.cfg.addProperty("scrollBeforeAmount",{value:0,handler:function(type,args,carouselElem){},validator:oThis.cfg.checkNumber});
this.cfg.addProperty("scrollAfterAmount",{value:0,handler:function(type,args,carouselElem){},validator:oThis.cfg.checkNumber});
this.cfg.addProperty("loadOnStart",{value:true,handler:function(type,args,carouselElem){},validator:oThis.cfg.checkBoolean});
this.cfg.addProperty("orientation",{value:"horizontal",handler:function(type,args,carouselElem){oThis.reload()
},validator:function(orientation){if(typeof orientation=="string"){return("horizontal,vertical".indexOf(orientation.toLowerCase())!=-1)
}else{return false
}}});
this.cfg.addProperty("size",{value:this.UNBOUNDED_SIZE,handler:function(type,args,carouselElem){oThis.reload()
},validator:oThis.cfg.checkNumber});
this.cfg.addProperty("numVisible",{value:3,handler:function(type,args,carouselElem){oThis.reload()
},validator:oThis.cfg.checkNumber});
this.cfg.addProperty("firstVisible",{value:1,handler:function(type,args,carouselElem){oThis.moveTo(args[0])
},validator:oThis.cfg.checkNumber});
this.cfg.addProperty("scrollInc",{value:3,handler:function(type,args,carouselElem){},validator:oThis.cfg.checkNumber});
this.cfg.addProperty("animationSpeed",{value:0.25,handler:function(type,args,carouselElem){oThis.animationSpeed=args[0]
},validator:oThis.cfg.checkNumber});
this.cfg.addProperty("animationMethod",{value:YAHOO.util.Easing.easeOut,handler:function(type,args,carouselElem){}});
this.cfg.addProperty("animationCompleteHandler",{value:null,handler:function(type,args,carouselElem){if(oThis._animationCompleteEvt){oThis._animationCompleteEvt.unsubscribe(oThis._currAnimationCompleteHandler,oThis)
}oThis._currAnimationCompleteHandler=args[0];
if(oThis._currAnimationCompleteHandler){if(!oThis._animationCompleteEvt){oThis._animationCompleteEvt=new YAHOO.util.CustomEvent("onAnimationComplete",oThis)
}oThis._animationCompleteEvt.subscribe(oThis._currAnimationCompleteHandler,oThis)
}}});
this.cfg.addProperty("autoPlay",{value:0,handler:function(type,args,carouselElem){var autoPlay=args[0];
if(autoPlay>0){oThis.startAutoPlay()
}else{oThis.stopAutoPlay()
}}});
this.cfg.addProperty("wrap",{value:false,handler:function(type,args,carouselElem){},validator:oThis.cfg.checkBoolean});
this.cfg.addProperty("navMargin",{value:0,handler:function(type,args,carouselElem){oThis.calculateSize()
},validator:oThis.cfg.checkNumber});
this.cfg.addProperty("revealAmount",{value:0,handler:function(type,args,carouselElem){oThis.reload()
},validator:oThis.cfg.checkNumber});
this.cfg.addProperty("prevElementID",{value:null,handler:function(type,args,carouselElem){if(oThis._carouselPrev){YAHOO.util.Event.removeListener(oThis._carouselPrev,"click",oThis._scrollPrev)
}oThis._prevElementID=args[0];
if(oThis._prevElementID==null){oThis._carouselPrev=YAHOO.util.Dom.getElementsByClassName(carouselPrevClass,"div",oThis.carouselElem)[0]
}else{oThis._carouselPrev=YAHOO.util.Dom.get(oThis._prevElementID)
}YAHOO.util.Event.addListener(oThis._carouselPrev,"click",oThis._scrollPrev,oThis)
}});
this.cfg.addProperty("prevElement",{value:null,handler:function(type,args,carouselElem){if(oThis._carouselPrev){YAHOO.util.Event.removeListener(oThis._carouselPrev,"click",oThis._scrollPrev)
}oThis._prevElementID=args[0];
if(oThis._prevElementID==null){oThis._carouselPrev=YAHOO.util.Dom.getElementsByClassName(carouselPrevClass,"div",oThis.carouselElem)[0]
}else{oThis._carouselPrev=YAHOO.util.Dom.get(oThis._prevElementID)
}YAHOO.util.Event.addListener(oThis._carouselPrev,"click",oThis._scrollPrev,oThis)
}});
this.cfg.addProperty("nextElementID",{value:null,handler:function(type,args,carouselElem){if(oThis._carouselNext){YAHOO.util.Event.removeListener(oThis._carouselNext,"click",oThis._scrollNext)
}oThis._nextElementID=args[0];
if(oThis._nextElementID==null){oThis._carouselNext=YAHOO.util.Dom.getElementsByClassName(carouselNextClass,"div",oThis.carouselElem)
}else{oThis._carouselNext=YAHOO.util.Dom.get(oThis._nextElementID)
}if(oThis._carouselNext){YAHOO.util.Event.addListener(oThis._carouselNext,"click",oThis._scrollNext,oThis)
}}});
this.cfg.addProperty("nextElement",{value:null,handler:function(type,args,carouselElem){if(oThis._carouselNext){YAHOO.util.Event.removeListener(oThis._carouselNext,"click",oThis._scrollNext)
}oThis._nextElementID=args[0];
if(oThis._nextElementID==null){oThis._carouselNext=YAHOO.util.Dom.getElementsByClassName(carouselNextClass,"div",oThis.carouselElem)
}else{oThis._carouselNext=YAHOO.util.Dom.get(oThis._nextElementID)
}if(oThis._carouselNext){YAHOO.util.Event.addListener(oThis._carouselNext,"click",oThis._scrollNext,oThis)
}}});
this.cfg.addProperty("disableSelection",{value:true,handler:function(type,args,carouselElem){},validator:oThis.cfg.checkBoolean});
this.cfg.addProperty("loadInitHandler",{value:null,handler:function(type,args,carouselElem){if(oThis._loadInitHandlerEvt){oThis._loadInitHandlerEvt.unsubscribe(oThis._currLoadInitHandler,oThis)
}oThis._currLoadInitHandler=args[0];
if(oThis._currLoadInitHandler){if(!oThis._loadInitHandlerEvt){oThis._loadInitHandlerEvt=new YAHOO.util.CustomEvent("onLoadInit",oThis)
}oThis._loadInitHandlerEvt.subscribe(oThis._currLoadInitHandler,oThis)
}}});
this.cfg.addProperty("loadNextHandler",{value:null,handler:function(type,args,carouselElem){if(oThis._loadNextHandlerEvt){oThis._loadNextHandlerEvt.unsubscribe(oThis._currLoadNextHandler,oThis)
}oThis._currLoadNextHandler=args[0];
if(oThis._currLoadNextHandler){if(!oThis._loadNextHandlerEvt){oThis._loadNextHandlerEvt=new YAHOO.util.CustomEvent("onLoadNext",oThis)
}oThis._loadNextHandlerEvt.subscribe(oThis._currLoadNextHandler,oThis)
}}});
this.cfg.addProperty("loadPrevHandler",{value:null,handler:function(type,args,carouselElem){if(oThis._loadPrevHandlerEvt){oThis._loadPrevHandlerEvt.unsubscribe(oThis._currLoadPrevHandler,oThis)
}oThis._currLoadPrevHandler=args[0];
if(oThis._currLoadPrevHandler){if(!oThis._loadPrevHandlerEvt){oThis._loadPrevHandlerEvt=new YAHOO.util.CustomEvent("onLoadPrev",oThis)
}oThis._loadPrevHandlerEvt.subscribe(oThis._currLoadPrevHandler,oThis)
}}});
this.cfg.addProperty("prevButtonStateHandler",{value:null,handler:function(type,args,carouselElem){if(oThis._currPrevButtonStateHandler){oThis._prevButtonStateHandlerEvt.unsubscribe(oThis._currPrevButtonStateHandler,oThis)
}oThis._currPrevButtonStateHandler=args[0];
if(oThis._currPrevButtonStateHandler){if(!oThis._prevButtonStateHandlerEvt){oThis._prevButtonStateHandlerEvt=new YAHOO.util.CustomEvent("onPrevButtonStateChange",oThis)
}oThis._prevButtonStateHandlerEvt.subscribe(oThis._currPrevButtonStateHandler,oThis)
}}});
this.cfg.addProperty("nextButtonStateHandler",{value:null,handler:function(type,args,carouselElem){if(oThis._currNextButtonStateHandler){oThis._nextButtonStateHandlerEvt.unsubscribe(oThis._currNextButtonStateHandler,oThis)
}oThis._currNextButtonStateHandler=args[0];
if(oThis._currNextButtonStateHandler){if(!oThis._nextButtonStateHandlerEvt){oThis._nextButtonStateHandlerEvt=new YAHOO.util.CustomEvent("onNextButtonStateChange",oThis)
}oThis._nextButtonStateHandlerEvt.subscribe(oThis._currNextButtonStateHandler,oThis)
}}});
if(carouselCfg){this.cfg.applyConfig(carouselCfg)
}YAHOO.util.Event.addListener(this.carouselElem,"mousedown",this._handleMouseDownForSelection,this,true);
this._origFirstVisible=this.cfg.getProperty("firstVisible");
this._currLoadInitHandler=this.cfg.getProperty("loadInitHandler");
this._currLoadNextHandler=this.cfg.getProperty("loadNextHandler");
this._currLoadPrevHandler=this.cfg.getProperty("loadPrevHandler");
this._currPrevButtonStateHandler=this.cfg.getProperty("prevButtonStateHandler");
this._currNextButtonStateHandler=this.cfg.getProperty("nextButtonStateHandler");
this._currAnimationCompleteHandler=this.cfg.getProperty("animationCompleteHandler");
this._nextElementID=this.cfg.getProperty("nextElementID");
if(!this._nextElementID){this._nextElementID=this.cfg.getProperty("nextElement")
}this._prevElementID=this.cfg.getProperty("prevElementID");
if(!this._prevElementID){this._prevElementID=this.cfg.getProperty("prevElement")
}this._autoPlayTimer=null;
this._priorLastVisible=this._priorFirstVisible=this.cfg.getProperty("firstVisible");
this._lastPrebuiltIdx=0;
this.carouselList=YAHOO.util.Dom.getElementsByClassName(carouselListClass,"ul",this.carouselElem)[0];
if(this._nextElementID==null){this._carouselNext=YAHOO.util.Dom.getElementsByClassName(carouselNextClass,"div",this.carouselElem)[0]
}else{this._carouselNext=YAHOO.util.Dom.get(this._nextElementID)
}if(this._prevElementID==null){this._carouselPrev=YAHOO.util.Dom.getElementsByClassName(carouselPrevClass,"div",this.carouselElem)[0]
}else{this._carouselPrev=YAHOO.util.Dom.get(this._prevElementID)
}this._clipReg=YAHOO.util.Dom.getElementsByClassName(carouselClipRegionClass,"div",this.carouselElem)[0];
if(this.isVertical()){YAHOO.util.Dom.addClass(this.carouselList,"carousel-vertical")
}this._scrollNextAnim=new YAHOO.util.Motion(this.carouselList,this.scrollNextParams,this.cfg.getProperty("animationSpeed"),this.cfg.getProperty("animationMethod"));
this._scrollPrevAnim=new YAHOO.util.Motion(this.carouselList,this.scrollPrevParams,this.cfg.getProperty("animationSpeed"),this.cfg.getProperty("animationMethod"));
if(this._carouselNext){YAHOO.util.Event.addListener(this._carouselNext,"click",this._scrollNext,this)
}if(this._carouselPrev){YAHOO.util.Event.addListener(this._carouselPrev,"click",this._scrollPrev,this)
}var loadInitHandler=this.cfg.getProperty("loadInitHandler");
if(loadInitHandler){this._loadInitHandlerEvt=new YAHOO.util.CustomEvent("onLoadInit",this);
this._loadInitHandlerEvt.subscribe(loadInitHandler,this)
}var loadNextHandler=this.cfg.getProperty("loadNextHandler");
if(loadNextHandler){this._loadNextHandlerEvt=new YAHOO.util.CustomEvent("onLoadNext",this);
this._loadNextHandlerEvt.subscribe(loadNextHandler,this)
}var loadPrevHandler=this.cfg.getProperty("loadPrevHandler");
if(loadPrevHandler){this._loadPrevHandlerEvt=new YAHOO.util.CustomEvent("onLoadPrev",this);
this._loadPrevHandlerEvt.subscribe(loadPrevHandler,this)
}var animationCompleteHandler=this.cfg.getProperty("animationCompleteHandler");
if(animationCompleteHandler){this._animationCompleteEvt=new YAHOO.util.CustomEvent("onAnimationComplete",this);
this._animationCompleteEvt.subscribe(animationCompleteHandler,this)
}var prevButtonStateHandler=this.cfg.getProperty("prevButtonStateHandler");
if(prevButtonStateHandler){this._prevButtonStateHandlerEvt=new YAHOO.util.CustomEvent("onPrevButtonStateChange",this);
this._prevButtonStateHandlerEvt.subscribe(prevButtonStateHandler,this)
}var nextButtonStateHandler=this.cfg.getProperty("nextButtonStateHandler");
if(nextButtonStateHandler){this._nextButtonStateHandlerEvt=new YAHOO.util.CustomEvent("onNextButtonStateChange",this);
this._nextButtonStateHandlerEvt.subscribe(nextButtonStateHandler,this)
}var visibleExtent=this._calculateVisibleExtent();
YAHOO.util.Event.onAvailable(this._carouselElemID+"-item-"+visibleExtent.start,this._calculateSize,this);
if(this.cfg.getProperty("loadOnStart")){this._loadInitial()
}},_handleMouseDownForSelection:function(e){if(this.cfg.getProperty("disableSelection")){YAHOO.util.Event.preventDefault(e);
YAHOO.util.Event.stopPropagation(e)
}},clear:function(){var loadInitHandler=this.cfg.getProperty("loadInitHandler");
if(loadInitHandler){this._removeChildrenFromNode(this.carouselList);
this._lastPrebuiltIdx=0
}this.stopAutoPlay();
this._priorLastVisible=this._priorFirstVisible=this._origFirstVisible;
this.cfg.setProperty("firstVisible",this._origFirstVisible,true);
this.moveTo(this._origFirstVisible)
},reload:function(numVisible){if(this._isValidObj(numVisible)){this.cfg.setProperty("numVisible",numVisible)
}this.clear();
var visibleExtent=this._calculateVisibleExtent();
YAHOO.util.Event.onAvailable(this._carouselElemID+"-item-"+visibleExtent.start,this._calculateSize,this);
this._loadInitial()
},load:function(){var visibleExtent=this._calculateVisibleExtent();
YAHOO.util.Event.onAvailable(this._carouselElemID+"-item-"+visibleExtent.start,this._calculateSize,this);
this._loadInitial()
},addItem:function(idx,innerHTMLOrElem,itemClass){if(idx>this.cfg.getProperty("size")){return null
}var liElem=this.getItem(idx);
if(!this._isValidObj(liElem)){liElem=this._createItem(idx,innerHTMLOrElem);
this.carouselList.appendChild(liElem)
}else{if(this._isValidObj(liElem.placeholder)){var newLiElem=this._createItem(idx,innerHTMLOrElem);
this.carouselList.replaceChild(newLiElem,liElem);
liElem=newLiElem
}}if(this._isValidObj(itemClass)){YAHOO.util.Dom.addClass(liElem,itemClass)
}if(this.isVertical()){setTimeout(function(){liElem.style.display="block"
},1)
}return liElem
},insertBefore:function(refIdx,innerHTML){if(refIdx>=this.cfg.getProperty("size")){return null
}if(refIdx<1){refIdx=1
}var insertionIdx=refIdx-1;
if(insertionIdx>this._lastPrebuiltIdx){this._prebuildItems(this._lastPrebuiltIdx,refIdx)
}var liElem=this._insertBeforeItem(refIdx,innerHTML);
this._enableDisableControls();
return liElem
},insertAfter:function(refIdx,innerHTML){if(refIdx>this.cfg.getProperty("size")){refIdx=this.cfg.getProperty("size")
}var insertionIdx=refIdx+1;
if(insertionIdx>this._lastPrebuiltIdx){this._prebuildItems(this._lastPrebuiltIdx,insertionIdx+1)
}var liElem=this._insertAfterItem(refIdx,innerHTML);
if(insertionIdx>this.cfg.getProperty("size")){this.cfg.setProperty("size",insertionIdx,true)
}this._enableDisableControls();
return liElem
},scrollNext:function(){this._scrollNext(null,this);
this._autoPlayTimer=null;
if(this.cfg.getProperty("autoPlay")!==0){this._autoPlayTimer=this.startAutoPlay()
}},scrollPrev:function(){this._scrollPrev(null,this)
},scrollTo:function(newStart){this._position(newStart,true)
},moveTo:function(newStart){this._position(newStart,false)
},startAutoPlay:function(interval){if(this._isValidObj(interval)){this.cfg.setProperty("autoPlay",interval,true)
}if(this._autoPlayTimer!==null){return this._autoPlayTimer
}var oThis=this;
var autoScroll=function(){oThis.scrollNext()
};
this._autoPlayTimer=setTimeout(autoScroll,this.cfg.getProperty("autoPlay"));
return this._autoPlayTimer
},stopAutoPlay:function(){if(this._autoPlayTimer!==null){clearTimeout(this._autoPlayTimer);
this._autoPlayTimer=null
}},isVertical:function(){return(this.cfg.getProperty("orientation")!="horizontal")
},isItemLoaded:function(idx){var liElem=this.getItem(idx);
if(this._isValidObj(liElem)&&!this._isValidObj(liElem.placeholder)){return true
}return false
},getItem:function(idx){var elemName=this._carouselElemID+"-item-"+idx;
var liElem=YAHOO.util.Dom.get(elemName);
return liElem
},show:function(){YAHOO.util.Dom.setStyle(this.carouselElem,"display","block");
this.calculateSize()
},hide:function(){YAHOO.util.Dom.setStyle(this.carouselElem,"display","none")
},calculateSize:function(){var ulKids=this.carouselList.childNodes;
var li=null;
for(var i=0;
i<ulKids.length;
i++){li=ulKids[i];
if(li.tagName=="LI"||li.tagName=="li"){break
}}var navMargin=this.cfg.getProperty("navMargin");
var numVisible=this.cfg.getProperty("numVisible");
var firstVisible=this.cfg.getProperty("firstVisible");
var pl=this._getStyleVal(li,"paddingLeft");
var pr=this._getStyleVal(li,"paddingRight");
var ml=this._getStyleVal(li,"marginLeft");
var mr=this._getStyleVal(li,"marginRight");
var pt=this._getStyleVal(li,"paddingTop");
var pb=this._getStyleVal(li,"paddingBottom");
var mt=this._getStyleVal(li,"marginTop");
var mb=this._getStyleVal(li,"marginBottom");
YAHOO.util.Dom.removeClass(this.carouselList,"carousel-vertical");
YAHOO.util.Dom.removeClass(this.carouselList,"carousel-horizontal");
if(this.isVertical()){var liPaddingMarginWidth=pl+pr+ml+mr;
YAHOO.util.Dom.addClass(this.carouselList,"carousel-vertical");
var liPaddingMarginHeight=pt+pb+mt+mb;
var upt=this._getStyleVal(this.carouselList,"paddingTop");
var upb=this._getStyleVal(this.carouselList,"paddingBottom");
var umt=this._getStyleVal(this.carouselList,"marginTop");
var umb=this._getStyleVal(this.carouselList,"marginBottom");
var ulPaddingHeight=upt+upb+umt+umb;
var revealAmt=(this._isExtraRevealed())?(this.cfg.getProperty("revealAmount")+(liPaddingMarginHeight)/2):0;
var liHeight=this._getStyleVal(li,"height",true);
this.scrollAmountPerInc=(liHeight+liPaddingMarginHeight);
var liWidth=this._getStyleVal(li,"width");
this.carouselElem.style.width=(liWidth+liPaddingMarginWidth)+"px";
this._clipReg.style.height=(this.scrollAmountPerInc*numVisible+revealAmt*2+ulPaddingHeight)+"px";
this.carouselElem.style.height=(this.scrollAmountPerInc*numVisible+revealAmt*2+navMargin*2+ulPaddingHeight)+"px";
var revealTop=(this._isExtraRevealed())?(revealAmt-(Math.abs(mt-mb)+Math.abs(pt-pb))/2):0;
YAHOO.util.Dom.setStyle(this.carouselList,"position","relative");
YAHOO.util.Dom.setStyle(this.carouselList,"top",""+revealTop+"px");
var currY=YAHOO.util.Dom.getY(this.carouselList);
YAHOO.util.Dom.setY(this.carouselList,currY-this.scrollAmountPerInc*(firstVisible-1))
}else{YAHOO.util.Dom.addClass(this.carouselList,"carousel-horizontal");
var upl=this._getStyleVal(this.carouselList,"paddingLeft");
var upr=this._getStyleVal(this.carouselList,"paddingRight");
var uml=this._getStyleVal(this.carouselList,"marginLeft");
var umr=this._getStyleVal(this.carouselList,"marginRight");
var ulPaddingWidth=upl+upr+uml+umr;
var liMarginWidth=ml+mr;
var liPaddingMarginWidth=liMarginWidth+pr+pl;
var revealAmt=(this._isExtraRevealed())?(this.cfg.getProperty("revealAmount")+(liPaddingMarginWidth)/2):0;
var liWidth=li.offsetWidth;
this.scrollAmountPerInc=liWidth+liMarginWidth;
var revealLeft=(this._isExtraRevealed())?(revealAmt-(Math.abs(mr-ml)+Math.abs(pr-pl))/2-(uml+upl)):0;
YAHOO.util.Dom.setStyle(this.carouselList,"position","relative");
YAHOO.util.Dom.setStyle(this.carouselList,"left",""+revealLeft+"px");
var currX=YAHOO.util.Dom.getX(this.carouselList);
YAHOO.util.Dom.setX(this.carouselList,currX-this.scrollAmountPerInc*(firstVisible-1))
}},setProperty:function(property,value,silent){this.cfg.setProperty(property,value,silent)
},getProperty:function(property){return this.cfg.getProperty(property)
},getFirstItemRevealed:function(){return this._firstItemRevealed
},getLastItemRevealed:function(){return this._lastItemRevealed
},getFirstVisible:function(){return this.cfg.getProperty("firstVisible")
},getLastVisible:function(){var firstVisible=this.cfg.getProperty("firstVisible");
var numVisible=this.cfg.getProperty("numVisible");
return firstVisible+numVisible-1
},_getStyleVal:function(li,style,returnFloat){var styleValStr=YAHOO.util.Dom.getStyle(li,style);
var styleVal=returnFloat?parseFloat(styleValStr):parseInt(styleValStr,10);
if(style=="height"&&isNaN(styleVal)){styleVal=li.offsetHeight
}else{if(isNaN(styleVal)){styleVal=0
}}return styleVal
},_calculateSize:function(me){me.calculateSize();
me.show()
},_removeChildrenFromNode:function(node){if(!this._isValidObj(node)){return
}var len=node.childNodes.length;
while(node.hasChildNodes()){node.removeChild(node.firstChild)
}},_prebuildLiElem:function(idx){if(idx<1){return
}var liElem=document.createElement("li");
liElem.id=this._carouselElemID+"-item-"+idx;
liElem.placeholder=true;
this.carouselList.appendChild(liElem);
this._lastPrebuiltIdx=(idx>this._lastPrebuiltIdx)?idx:this._lastPrebuiltIdx
},_createItem:function(idx,innerHTMLOrElem){if(idx<1){return
}var liElem=document.createElement("li");
liElem.id=this._carouselElemID+"-item-"+idx;
if(typeof(innerHTMLOrElem)==="string"){liElem.innerHTML=innerHTMLOrElem
}else{liElem.appendChild(innerHTMLOrElem)
}return liElem
},_insertAfterItem:function(refIdx,innerHTMLOrElem){return this._insertBeforeItem(refIdx+1,innerHTMLOrElem)
},_insertBeforeItem:function(refIdx,innerHTMLOrElem){var refItem=this.getItem(refIdx);
var size=this.cfg.getProperty("size");
if(size!=this.UNBOUNDED_SIZE){this.cfg.setProperty("size",size+1,true)
}for(var i=this._lastPrebuiltIdx;
i>=refIdx;
i--){var anItem=this.getItem(i);
if(this._isValidObj(anItem)){anItem.id=this._carouselElemID+"-item-"+(i+1)
}}var liElem=this._createItem(refIdx,innerHTMLOrElem);
var insertedItem=this.carouselList.insertBefore(liElem,refItem);
this._lastPrebuiltIdx+=1;
return liElem
},insertAfterEnd:function(innerHTMLOrElem){return this.insertAfter(this.cfg.getProperty("size"),innerHTMLOrElem)
},_position:function(newStart,showAnimation){var currStart=this._priorFirstVisible;
if(newStart>currStart){var inc=newStart-currStart;
this._scrollNextInc(inc,showAnimation)
}else{var dec=currStart-newStart;
this._scrollPrevInc(dec,showAnimation)
}},_scrollPrev:function(e,carousel){if(e!==null){carousel.stopAutoPlay()
}carousel._scrollPrevInc(carousel.cfg.getProperty("scrollInc"),(carousel.cfg.getProperty("animationSpeed")!==0));
YAHOO.util.Event.stopEvent(e)
},_scrollNext:function(e,carousel){if(e!==null){carousel.stopAutoPlay()
}carousel._scrollNextInc(carousel.cfg.getProperty("scrollInc"),(carousel.cfg.getProperty("animationSpeed")!==0));
YAHOO.util.Event.stopEvent(e)
},_handleAnimationComplete:function(type,args,argList){var carousel=argList[0];
var direction=argList[1];
carousel._animationCompleteEvt.fire(direction)
},_areAllItemsLoaded:function(first,last){var itemsLoaded=true;
for(var i=first;
i<=last;
i++){var liElem=this.getItem(i);
if(!this._isValidObj(liElem)){this._prebuildLiElem(i);
itemsLoaded=false
}else{if(this._isValidObj(liElem.placeholder)){itemsLoaded=false
}}}return itemsLoaded
},_prebuildItems:function(first,last){for(var i=first;
i<=last;
i++){var liElem=this.getItem(i);
if(!this._isValidObj(liElem)){this._prebuildLiElem(i)
}}},_isExtraRevealed:function(){return(this.cfg.getProperty("revealAmount")>0)
},_scrollNextInc:function(inc,showAnimation){if(this._scrollNextAnim.isAnimated()||this._scrollPrevAnim.isAnimated()){return false
}var numVisible=this.cfg.getProperty("numVisible");
var currStart=this._priorFirstVisible;
var currEnd=this._priorLastVisible;
var size=this.cfg.getProperty("size");
var scrollExtent=this._calculateAllowableScrollExtent();
if(this.cfg.getProperty("wrap")&&currEnd==scrollExtent.end){this.scrollTo(scrollExtent.start);
return
}var newStart=currStart+inc;
var newEnd=newStart+numVisible-1;
if(newEnd>scrollExtent.end){newEnd=scrollExtent.end;
newStart=newEnd-numVisible+1
}inc=newStart-currStart;
this.cfg.setProperty("firstVisible",newStart,true);
if(inc>0){if(this._isValidObj(this.cfg.getProperty("loadNextHandler"))){var visibleExtent=this._calculateVisibleExtent(newStart,newEnd);
var cacheStart=(currEnd+1)<visibleExtent.start?(currEnd+1):visibleExtent.start;
var alreadyCached=this._areAllItemsLoaded(cacheStart,visibleExtent.end);
this._loadNextHandlerEvt.fire(visibleExtent.start,visibleExtent.end,alreadyCached)
}if(showAnimation){var nextParams={points:{by:[-this.scrollAmountPerInc*inc,0]}};
if(this.isVertical()){nextParams={points:{by:[0,-this.scrollAmountPerInc*inc]}}
}this._scrollNextAnim=new YAHOO.util.Motion(this.carouselList,nextParams,this.cfg.getProperty("animationSpeed"),this.cfg.getProperty("animationMethod"));
if(this.cfg.getProperty("animationCompleteHandler")){this._scrollNextAnim.onComplete.subscribe(this._handleAnimationComplete,[this,"next"])
}this._scrollNextAnim.animate()
}else{if(this.isVertical()){var currY=YAHOO.util.Dom.getY(this.carouselList);
YAHOO.util.Dom.setY(this.carouselList,currY-this.scrollAmountPerInc*inc)
}else{var currX=YAHOO.util.Dom.getX(this.carouselList);
YAHOO.util.Dom.setX(this.carouselList,currX-this.scrollAmountPerInc*inc)
}}}this._priorFirstVisible=newStart;
this._priorLastVisible=newEnd;
this._enableDisableControls();
return false
},_scrollPrevInc:function(dec,showAnimation){if(this._scrollNextAnim.isAnimated()||this._scrollPrevAnim.isAnimated()){return false
}var numVisible=this.cfg.getProperty("numVisible");
var currStart=this._priorFirstVisible;
var currEnd=this._priorLastVisible;
var size=this.cfg.getProperty("size");
var newStart=currStart-dec;
var scrollExtent=this._calculateAllowableScrollExtent();
newStart=(newStart<scrollExtent.start)?scrollExtent.start:newStart;
var newEnd=newStart+numVisible-1;
if(newEnd>scrollExtent.end){newEnd=scrollExtent.end;
newStart=newEnd-numVisible+1
}dec=currStart-newStart;
this.cfg.setProperty("firstVisible",newStart,true);
if(dec>0){if(this._isValidObj(this.cfg.getProperty("loadPrevHandler"))){var visibleExtent=this._calculateVisibleExtent(newStart,newEnd);
var cacheEnd=(currStart-1)>visibleExtent.end?(currStart-1):visibleExtent.end;
var alreadyCached=this._areAllItemsLoaded(visibleExtent.start,cacheEnd);
this._loadPrevHandlerEvt.fire(visibleExtent.start,visibleExtent.end,alreadyCached)
}if(showAnimation){var prevParams={points:{by:[this.scrollAmountPerInc*dec,0]}};
if(this.isVertical()){prevParams={points:{by:[0,this.scrollAmountPerInc*dec]}}
}this._scrollPrevAnim=new YAHOO.util.Motion(this.carouselList,prevParams,this.cfg.getProperty("animationSpeed"),this.cfg.getProperty("animationMethod"));
if(this.cfg.getProperty("animationCompleteHandler")){this._scrollPrevAnim.onComplete.subscribe(this._handleAnimationComplete,[this,"prev"])
}this._scrollPrevAnim.animate()
}else{if(this.isVertical()){var currY=YAHOO.util.Dom.getY(this.carouselList);
YAHOO.util.Dom.setY(this.carouselList,currY+this.scrollAmountPerInc*dec)
}else{var currX=YAHOO.util.Dom.getX(this.carouselList);
YAHOO.util.Dom.setX(this.carouselList,currX+this.scrollAmountPerInc*dec)
}}}this._priorFirstVisible=newStart;
this._priorLastVisible=newEnd;
this._enableDisableControls();
return false
},_enableDisableControls:function(){var firstVisible=this.cfg.getProperty("firstVisible");
var lastVisible=this.getLastVisible();
var scrollExtent=this._calculateAllowableScrollExtent();
if(this._prevEnabled){if(firstVisible===scrollExtent.start){this._disablePrev()
}}if(this._prevEnabled===false){if(firstVisible>scrollExtent.start){this._enablePrev()
}}if(this._nextEnabled){if(lastVisible===scrollExtent.end){this._disableNext()
}}if(this._nextEnabled===false){if(lastVisible<scrollExtent.end){this._enableNext()
}}},_loadInitial:function(){var firstVisible=this.cfg.getProperty("firstVisible");
this._priorLastVisible=this.getLastVisible();
if(this._loadInitHandlerEvt){var visibleExtent=this._calculateVisibleExtent(firstVisible,this._priorLastVisible);
var alreadyCached=this._areAllItemsLoaded(1,visibleExtent.end);
this._loadInitHandlerEvt.fire(visibleExtent.start,visibleExtent.end,alreadyCached)
}if(this.cfg.getProperty("autoPlay")!==0){this._autoPlayTimer=this.startAutoPlay()
}this._enableDisableControls()
},_calculateAllowableScrollExtent:function(){var scrollBeforeAmount=this.cfg.getProperty("scrollBeforeAmount");
var scrollAfterAmount=this.cfg.getProperty("scrollAfterAmount");
var size=this.cfg.getProperty("size");
var extent={start:1-scrollBeforeAmount,end:size+scrollAfterAmount};
return extent
},_calculateVisibleExtent:function(start,end){if(!start){start=this.cfg.getProperty("firstVisible");
end=this.getLastVisible()
}var size=this.cfg.getProperty("size");
start=start<1?1:start;
end=end>size?size:end;
var extent={start:start,end:end};
this._firstItemRevealed=-1;
this._lastItemRevealed=-1;
if(this._isExtraRevealed()){if(start>1){this._firstItemRevealed=start-1;
extent.start=this._firstItemRevealed
}if(end<size){this._lastItemRevealed=end+1;
extent.end=this._lastItemRevealed
}}return extent
},_disablePrev:function(){this._prevEnabled=false;
if(this._prevButtonStateHandlerEvt){this._prevButtonStateHandlerEvt.fire(false,this._carouselPrev)
}if(this._isValidObj(this._carouselPrev)){YAHOO.util.Event.removeListener(this._carouselPrev,"click",this._scrollPrev)
}},_enablePrev:function(){this._prevEnabled=true;
if(this._prevButtonStateHandlerEvt){this._prevButtonStateHandlerEvt.fire(true,this._carouselPrev)
}if(this._isValidObj(this._carouselPrev)){YAHOO.util.Event.addListener(this._carouselPrev,"click",this._scrollPrev,this)
}},_disableNext:function(){if(this.cfg.getProperty("wrap")){return
}this._nextEnabled=false;
if(this._isValidObj(this._nextButtonStateHandlerEvt)){this._nextButtonStateHandlerEvt.fire(false,this._carouselNext)
}if(this._isValidObj(this._carouselNext)){YAHOO.util.Event.removeListener(this._carouselNext,"click",this._scrollNext)
}},_enableNext:function(){this._nextEnabled=true;
if(this._isValidObj(this._nextButtonStateHandlerEvt)){this._nextButtonStateHandlerEvt.fire(true,this._carouselNext)
}if(this._isValidObj(this._carouselNext)){YAHOO.util.Event.addListener(this._carouselNext,"click",this._scrollNext,this)
}},_isValidObj:function(obj){if(null==obj){return false
}if("undefined"==typeof(obj)){return false
}return true
}};