// Lightbox 1.5 - Extended version of Slimbox
// Copyright (c) 2007 Samuel Birch <http://phatfusion.net>
// MIT-style license

var Lightbox={init:function(options){this.options=Object.extend({resizeDuration:400,resizeTransition:Fx.Transitions.sineInOut,initialWidth:250,initialHeight:250,animateCaption:{In:true,Out:true},container:document.body,showControls:false,showNumbers:true,descriptions:false,opacity:0.8},options||{});this.anchors=[];$each(document.links,function(el){if(el.rel&&el.rel.test(/^lightbox/i)){el.onclick=this.click.pass(el,this);this.anchors.push(el);}},this);this.eventKeyDown=this.keyboardListener.bindAsEventListener(this);this.eventPosition=this.position.bind(this);this.overlay=new Element('div').setProperty('id','lbOverlay').injectInside(this.options.container);this.center=new Element('div').setProperty('id','lbCenter').setStyles({width:this.options.initialWidth+'px',height:this.options.initialHeight+'px',marginLeft:'-'+(this.options.initialWidth/2)+'px',display:'none'}).injectInside(this.options.container);this.image=new Element('div').setProperty('id','lbImage').injectInside(this.center);this.bottomContainer=new Element('div').setProperty('id','lbBottomContainer').setStyle('display','none').injectInside(this.options.container);this.bottom=new Element('div').setProperty('id','lbBottom').injectInside(this.bottomContainer);if(this.options.showControls){this.controlDiv=new Element('div').setProperty('id','lbControls').injectInside(this.bottom);}else{this.controlDiv=this.image;}
this.prevLink=new Element('a').setProperties({id:'lbPrevLink',href:'#'}).setStyle('display','none').injectInside(this.controlDiv);this.nextLink=this.prevLink.clone().setProperty('id','lbNextLink').injectInside(this.controlDiv);this.prevLink.onclick=this.previous.bind(this);this.nextLink.onclick=this.next.bind(this);this.closeButton=new Element('a').setProperties({id:'lbCloseLink',href:'#'}).injectInside(this.bottom)
this.closeButton.onclick=this.overlay.onclick=this.close.bind(this);this.caption=new Element('div').setProperty('id','lbCaption').injectInside(this.bottom);if(this.options.showNumbers){this.number=new Element('div').setProperty('id','lbNumber').injectInside(this.bottom);}
new Element('div').setStyle('clear','both').injectInside(this.bottom);var nextEffect=this.nextEffect.bind(this);this.fx={overlay:this.overlay.effect('opacity',{duration:500}).hide(),resize:this.center.effects({duration:this.options.resizeDuration,transition:this.options.resizeTransition,onComplete:nextEffect}),image:this.image.effect('opacity',{duration:500,onComplete:nextEffect}),bottom:this.bottom.effect('margin-top',{duration:400,onComplete:nextEffect})};this.preloadPrev=new Image();this.preloadNext=new Image();},click:function(link){if(link.rel.length==8)return this.show(link.href,link.title);var j,imageNum,images=[];this.anchors.each(function(el){if(el.rel==link.rel){for(j=0;j<images.length;j++)if(images[j][0]==el.href)break;if(j==images.length){images.push([el.href,el.title]);if(el.href==link.href)imageNum=j;}}},this);return this.open(images,imageNum);},show:function(url,title){return this.open([[url,title]],0);},open:function(images,imageNum){this.image.style.backgroundImage='';this.images=images;this.position();this.setup(true);this.top=window.getScrollTop()+(window.getHeight()/15);this.window={};this.window.height=window.getScrollHeight();this.window.width=window.getScrollWidth();this.window.top=window.getScrollTop();this.window.left=window.getScrollLeft();this.center.setStyles({top:this.top+'px',display:''});this.fx.overlay.start(this.options.opacity);return this.changeImage(imageNum);},position:function(){if(this.options.container==document.body){var h=window.getScrollHeight()+'px';var w=window.getScrollWidth()+'px';this.overlay.setStyles({top:'0px',height:h,width:w});}else{var myCoords=this.options.container.getCoordinates();this.overlay.setStyles({top:myCoords.top+'px',height:myCoords.height+'px',left:myCoords.left+'px',width:myCoords.width+'px'});}},setup:function(open){var elements=$A(document.getElementsByTagName('object'));if(window.ie)elements.extend(document.getElementsByTagName('select'));elements.each(function(el){el.style.visibility=open?'hidden':'';});var fn=open?'addEvent':'removeEvent';window[fn]('scroll',this.eventPosition)[fn]('resize',this.eventPosition);document[fn]('keydown',this.eventKeyDown);this.step=0;},keyboardListener:function(event){switch(event.keyCode){case 27:case 88:case 67:this.close();break;case 37:case 80:this.previous();break;case 39:case 78:this.next();}},previous:function(){this.linkLoc--;return this.changeImage(this.activeImage-1);},next:function(){this.linkLoc++;return this.changeImage(this.activeImage+1);},changeImage:function(imageNum){if(this.step||(imageNum<0)||(imageNum>=this.images.length))return false;this.step=1;this.activeImage=imageNum;if(this.options.animateCaption.In&&this.bottom.offsetHeight){this.prevLink.style.display=this.nextLink.style.display='none';this.bottom.effect('margin-top',{duration:300,onComplete:this.loadImage.bind(this)}).start(-this.bottom.offsetHeight);}else{this.bottomContainer.style.display=this.prevLink.style.display=this.nextLink.style.display='none';this.loadImage();}
this.fx.image.hide();this.center.className='lbLoading';return false;},loadImage:function(){this.preload=new Image();this.preload.onload=this.nextEffect.bind(this);this.preload.src=this.images[this.activeImage][0];},nextEffect:function(){switch(this.step++){case 1:this.center.className='';this.image.style.backgroundImage='url('+this.images[this.activeImage][0]+')';this.image.style.width=this.bottom.style.width=this.preload.width+'px';if(this.options.showControls){this.image.style.height=this.preload.height+'px';}else{this.image.style.height=this.prevLink.style.height=this.nextLink.style.height=this.preload.height+'px';}
this.caption.setHTML(this.images[this.activeImage][1]||'');if(this.options.descriptions!=false){if(this.description.getFirst()){this.description.getFirst().remove()};var cl=this.options.descriptions[this.linkLoc].clone();cl.setStyle('display','block').injectInside(this.description);}
if(this.options.showNumbers){this.number.setHTML((this.images.length==1)?'':'Image '+(this.activeImage+1)+' of '+this.images.length);}
if(this.activeImage)this.preloadPrev.src=this.images[this.activeImage-1][0];if(this.activeImage!=(this.images.length-1))this.preloadNext.src=this.images[this.activeImage+1][0];if(this.center.clientHeight!=this.image.offsetHeight){this.fx.resize.start({height:this.image.offsetHeight});break;}
this.step++;case 2:if(this.center.clientWidth!=this.image.offsetWidth){this.fx.resize.start({width:this.image.offsetWidth,marginLeft:-this.image.offsetWidth/2});break;}
this.step++;case 3:this.bottomContainer.setStyles({top:(this.top+this.center.clientHeight)+'px',height:'0px',marginLeft:this.center.style.marginLeft,display:''});this.fx.image.start(1);var extra=this.caption.getStyle('height').toInt();if(this.options.descriptions!=false){extra+=this.description.getStyle('height').toInt()}
if(this.options.showControls){extra+=this.controlDiv.getStyle('height').toInt()}
if(this.options.showNumbers){extra+=this.number.getStyle('height').toInt()}
var num=(extra-(this.closeButton.getStyle('height').toInt()*2));if(num<0){num=0}
this.closeButton.setStyle('marginTop',num+'px');if(this.activeImage!=0)this.prevLink.style.display='';if(this.activeImage!=(this.images.length-1))this.nextLink.style.display='';break;case 4:if(this.options.animateCaption.Out){this.fx.bottom.set(-this.bottom.offsetHeight);this.bottomContainer.style.height='';this.fx.bottom.start(0);break;}
this.bottomContainer.style.height='';case 5:this.step=0;}},close:function(){if(this.step<0)return;this.step=-1;if(this.preload){this.preload.onload=Class.empty;this.preload=null;}
for(var f in this.fx)this.fx[f].stop();this.center.style.display=this.bottomContainer.style.display='none';this.fx.overlay.chain(this.setup.pass(false,this)).start(0);this.overlay.setStyles({height:this.window.height+'px',width:this.window.width+'px'});return false;}};