//
// iWeb - iWebImage.js
// Copyright 2007-2008 Apple Inc.
// All rights reserved.
//

var IWAllImages={};var IWAllImageObjects={};function IWCreateImage(url)
{return IWAllImages[url]||new IWImage(url);}
var IWNamedImages={};function IWImageNamed(name)
{var url=IWNamedImages[name];return url?IWCreateImage(url):null}
function IWRegisterNamedImage(name,url)
{IWNamedImages[name]=url;}
var IWImageEnableUnload=isiPhone;var IWImage=Class.create({initialize:function(url)
{if(IWAllImages.hasOwnProperty(url))
{iWLog("warning -- use IWCreateImage rather than new IWImage and you'll get better performance");}
this.mPreventUnloading=0;this.mLoading=false;this.mLoaded=false;this.mURL=url;this.mCallbacks=[];IWAllImages[url]=this;},sourceURL:function()
{return this.mURL;},loaded:function()
{return this.mLoaded;},load:function(callback,delayCallbackIfLoaded)
{if(this.mLoaded&&(callback!=null))
{delayCallbackIfLoaded?setTimeout(callback,0):callback();}
else
{if(callback!=null)
{this.mCallbacks.push(callback);}
if(this.mLoading==false)
{this.mLoading=true;var img=new Image();IWAllImageObjects[this.sourceURL()]=img;img.onload=this.p_onload.bind(this);img.src=this.mURL;}}},unload:function(evenIfNotEnabled)
{if((evenIfNotEnabled||IWImageEnableUnload)&&this.mLoaded)
{if(this.mPreventUnloading<=0)
{this.mLoaded=false;this.mLoading=false;IWAllImageObjects[this.sourceURL()]=null;}
else
{this.mPreventedUnload=true;}}},preventUnloading:function()
{if(this.mPreventUnloading==0)
{this.mPreventedUnload=false;}
++this.mPreventUnloading;},allowUnloading:function()
{--this.mPreventUnloading;if(this.mPreventUnloading<=0&&this.mPreventedUnload)
{this.unload();}},naturalSize:function()
{(function(){return this.mNaturalSize!==undefined}).bind(this).assert();return this.mNaturalSize;},imgObject:function()
{return IWAllImageObjects[this.sourceURL()];},p_onload:function()
{this.preventUnloading();this.mLoaded=true;if(this.mNaturalSize===undefined)
{var imgObject=this.imgObject();(function(){return imgObject!==undefined}).assert();this.mNaturalSize=new IWSize(imgObject.width,imgObject.height);}
for(var i=0;i<this.mCallbacks.length;++i)
{this.mCallbacks[i]();}
this.mCallbacks=[];this.allowUnloading();},toString:function()
{return"IWImage("+this.mNaturalSize+", "+this.mURL+")";}});function IWCreateLoadingArea()
{if(IWSharedLoadingAreaManager==null)
{IWSharedLoadingAreaManager=new IWLoadingAreaManager();}
return IWSharedLoadingAreaManager.createLoadingArea();}
var IWLoadingAreaManager=Class.create({initialize:function()
{var div=$(document.createElement("div"));div.setStyle({visibility:"hidden",position:"absolute",width:0,height:0,overflow:"hidden"});document.body.appendChild(div);this.mCurrentLoadingArea=div;},createLoadingArea:function()
{var loadingArea=document.createElement('div');this.mCurrentLoadingArea.appendChild(loadingArea);return loadingArea;}});var IWSharedLoadingAreaManager=null;var IWSharedEffectRegistry=null;var allStyleSheetsLoaded=false;var timeStyleSheetsAppearedInDOM=null;function IWCreateEffectRegistry()
{if(IWSharedEffectRegistry==null)
{IWSharedEffectRegistry=new IWEffectRegistry();}
return IWSharedEffectRegistry;}
var IWEffectRegistry=Class.create({initialize:function()
{this.mEffects=null;},registerEffects:function(effects)
{this.mEffects=effects;},applyEffects:function()
{var effectQueue=[];effectQueue=effectQueue.concat(this.p_queueForEffectType("crop"));effectQueue=effectQueue.concat(this.p_queueForEffectType("stroke"));effectQueue=effectQueue.concat(this.p_queueForEffectType("reflection"));effectQueue=effectQueue.concat(this.p_queueForEffectType("shadow"));this.p_applyEffectsFromQueue(effectQueue);},p_queueForEffectType:function(effectType)
{var effectQueue=[];var i=0;var effectClass=effectType+"_"+i++;while(effect=this.mEffects[effectClass])
{effectQueue=effectQueue.concat(this.p_queueForEffectClass(effect,effectClass));effectClass=effectType+"_"+i++;}
return effectQueue;},p_queueForEffectClass:function(effect,effectClass,elementList)
{var effectQueue=[];var elements=elementList||$$("."+effectClass);while(elements&&elements.length>0)
{var element=elements.shift();var children=element.select("."+effectClass);if(children.length>0)
{elements=elements.minusArray(children);effectQueue=effectQueue.concat(this.p_queueForEffectClass(effect,effectClass,children));}
effectQueue.push({element:element,effect:effect});}
return effectQueue;},p_allStyleSheetsLoaded:function()
{if(isCamino||isFirefox)
{if(timeStyleSheetsAppearedInDOM!=null)
{duration=(new Date().getTime())-timeStyleSheetsAppearedInDOM;if(duration>100)
{allStyleSheetsLoaded=true;timeStyleSheetsAppearedInDOM=null;}}
else if(!allStyleSheetsLoaded)
{for(var i=0,sheetCount=document.styleSheets.length;i<sheetCount;i++)
{var styleSheet=document.styleSheets[i];if(styleSheet.href&&styleSheet.href.indexOf("Moz.css")!=-1)
{timeStyleSheetsAppearedInDOM=new Date().getTime();}}}}
else
{allStyleSheetsLoaded=true;}
return allStyleSheetsLoaded;},p_applyEffectsFromQueue:function(queue)
{var startTime=new Date().getTime();var duration=0;var readyToApplyEffects=this.p_allStyleSheetsLoaded();while(queue.length>0&&duration<100&&readyToApplyEffects)
{var queueEntry=queue.shift();if(queueEntry&&queueEntry.effect&&queueEntry.element)
{queueEntry.effect.applyToElement(queueEntry.element);}
duration=(new Date().getTime())-startTime;}
if(queue.length>0)
{setTimeout(this.p_applyEffectsFromQueue.bind(this,queue),0);}
else
{performPostEffectsFixups();}}});function IWChildOffset(child,parent,positionedOnly)
{var l=0;var t=0;if(parent)
{var current=child;while(current&&current!=parent)
{if(!positionedOnly||(current.style.position=="absolute")||(current.style.position=="relative"))
{l+=current.offsetLeft;t+=current.offsetTop;}
current=current.parentNode;}}
return new IWPoint(l,t)