LightboxOptions=Object.extend({fileBottomNavCloseImage:'images/closelabel.gif',overlayOpacity:0.8,fixedWidth:920,fixedHeight:500,animate:false,resizeSpeed:7,borderSize:10,labelImage:"Bild",labelOf:"von"},window.LightboxOptions||{});var Lightbox=Class.create();Lightbox.prototype={imageArray:[],activeImage:undefined,initialize:function(){this.updateImageList();this.keyboardAction=this.keyboardAction.bindAsEventListener(this);if(LightboxOptions.resizeSpeed>10)LightboxOptions.resizeSpeed=10;if(LightboxOptions.resizeSpeed<1)LightboxOptions.resizeSpeed=1;this.resizeDuration=0;this.overlayDuration=0.2;var hSize=LightboxOptions.fixedWidth+"px";var vSize=LightboxOptions.fixedHeight+"px";var objBody=$$('body')[0];objBody.appendChild(Builder.node('div',{id:'overlay'}));objBody.appendChild(Builder.node('div',{id:'lightbox'},[Builder.node('div',{id:'outerImageContainer'},[Builder.node('div',{id:'imageContainer'},Builder.node('img',{id:'lightboxImage'})),Builder.node('div',{id:'hoverNav'},[Builder.node('a',{id:'prevLink',href:'#',title:'zum vorherigen Bild'}),Builder.node('a',{id:'nextLink',href:'#',title:'zum nächsten Bild'})])]),Builder.node('div',{id:'imageDataContainer'},Builder.node('div',{id:'imageData'},[Builder.node('div',{id:'imageDetails'},[Builder.node('span',{id:'caption'}),Builder.node('span',{id:'numberDisplay'})]),Builder.node('div',{id:'bottomNav'},Builder.node('a',{id:'bottomNavClose',href:'#',title:'Bildbetrachter schließen'},Builder.node('img',{src:LightboxOptions.fileBottomNavCloseImage})))]))]));$('overlay').hide().observe('click',(function(){this.end();}).bind(this));$('lightbox').hide().observe('click',(function(event){if(event.element().id=='lightbox')this.end();}).bind(this));$('outerImageContainer').hide().setStyle({backgroundColor:'#FFF'});$('prevLink').hide().observe('click',(function(event){event.stop();this.changeImage(this.activeImage-1);}).bindAsEventListener(this));$('nextLink').hide().observe('click',(function(event){event.stop();this.changeImage(this.activeImage+1);}).bindAsEventListener(this));$('bottomNavClose').observe('click',(function(event){event.stop();this.end();}).bind(this));$('imageDataContainer').hide().setStyle({width:hSize});var th=this;(function(){var ids='overlay lightbox outerImageContainer imageContainer lightboxImage hoverNav prevLink nextLink '+'imageDataContainer imageData imageDetails caption numberDisplay bottomNav bottomNavClose';$w(ids).each(function(id){th[id]=$(id);});}).defer();},updateImageList:function(){this.updateImageList=Prototype.emptyFunction;document.observe('click',(function(event){var target=event.findElement('a[rel^=lightbox]')||event.findElement('area[rel^=lightbox]');if(target){event.stop();this.start(target);}}).bind(this));},start:function(imageLink){$$('select','object','embed').each(function(node){node.style.visibility='hidden'});var arrayPageSize=this.getPageSize();$('overlay').setStyle({width:arrayPageSize[0]+'px',height:arrayPageSize[1]+'px'});$('outerImageContainer').setStyle({width:LightboxOptions.fixedWidth+'px',height:LightboxOptions.fixedHeight+'px'});new Effect.Appear(this.overlay,{duration:0.2,from:0.0,to:LightboxOptions.overlayOpacity});new Effect.Appear(this.outerImageContainer,{duration:.7,from:0.0,to:1});var arrayPageScroll=document.viewport.getScrollOffsets();var lightboxTop=arrayPageScroll[1]+20;var lightboxLeft=arrayPageScroll[0];this.lightbox.setStyle({top:lightboxTop+'px',left:lightboxLeft+'px'}).show();this.imageArray=[];var imageNum=0;if((imageLink.rel=='lightbox')){this.imageArray.push([imageLink.href,imageLink.title]);}else{this.imageArray=$$(imageLink.tagName+'[href][rel="'+imageLink.rel+'"]').collect(function(anchor){return[anchor.href,anchor.title];}).uniq();while(this.imageArray[imageNum][0]!=imageLink.href){imageNum++;}}
this.changeImage(imageNum);},changeImage:function(imageNum){this.activeImage=imageNum;this.lightboxImage.hide();var imgPreloader=new Image();imgPreloader.onload=(function(){this.lightboxImage.src=this.imageArray[this.activeImage][0];this.resizeImageContainer(imgPreloader.width,imgPreloader.height);}).bind(this);imgPreloader.src=this.imageArray[this.activeImage][0];},resizeImageContainer:function(imgWidth,imgHeight){var widthCurrent=LightboxOptions.fixedWidth;var heightCurrent=LightboxOptions.fixedHeight;var widthNew=LightboxOptions.fixedWidth;var heightNew=LightboxOptions.fixedHeight;var timeout=100;if(Prototype.Browser.IE)timeout=250;var newTop=(heightCurrent-imgHeight)/2+"px";var newLeft=(widthCurrent-imgWidth)/2+"px";this.imageContainer.setStyle({top:newTop,left:newLeft});(function(){this.showImage();}).bind(this).delay(timeout/1000);},showImage:function(){new Effect.Appear(this.lightboxImage,{duration:this.resizeDuration,queue:'end',afterFinish:(function(){this.updateDetails();}).bind(this)});this.preloadNeighborImages();},updateDetails:function(){if(this.imageArray[this.activeImage][1]!=""){this.caption.update(this.imageArray[this.activeImage][1]).show();}
new Effect.Parallel([new Effect.SlideDown(this.imageDataContainer,{sync:true,duration:this.resizeDuration,from:0.0,to:1.0}),new Effect.Appear(this.imageDataContainer,{sync:true,duration:this.resizeDuration})],{duration:this.resizeDuration,afterFinish:(function(){var arrayPageSize=this.getPageSize();this.overlay.setStyle({height:arrayPageSize[1]+'px'});this.updateNav();}).bind(this)});},updateNav:function(){this.hoverNav.show();if(this.activeImage>0)this.prevLink.show();else this.prevLink.hide();if(this.activeImage<(this.imageArray.length-1))this.nextLink.show();else this.nextLink.hide();this.enableKeyboardNav();},enableKeyboardNav:function(){document.observe('keydown',this.keyboardAction);},disableKeyboardNav:function(){document.stopObserving('keydown',this.keyboardAction);},keyboardAction:function(event){var keycode=event.keyCode;var escapeKey;if(event.DOM_VK_ESCAPE){escapeKey=event.DOM_VK_ESCAPE;}else{escapeKey=27;}
var key=String.fromCharCode(keycode).toLowerCase();if(key.match(/x|o|c/)||(keycode==escapeKey)){this.end();}else if((key=='p')||(keycode==37)){if(this.activeImage!=0){this.disableKeyboardNav();this.changeImage(this.activeImage-1);}}else if((key=='n')||(keycode==39)){if(this.activeImage!=(this.imageArray.length-1)){this.disableKeyboardNav();this.changeImage(this.activeImage+1);}}},preloadNeighborImages:function(){var preloadNextImage,preloadPrevImage;if(this.imageArray.length>this.activeImage+1){preloadNextImage=new Image();preloadNextImage.src=this.imageArray[this.activeImage+1][0];}
if(this.activeImage>0){preloadPrevImage=new Image();preloadPrevImage.src=this.imageArray[this.activeImage-1][0];}},end:function(){this.disableKeyboardNav();this.outerImageContainer.hide();this.imageDataContainer.hide();this.lightbox.hide();new Effect.Fade(this.overlay,{duration:0.3});$$('select','object','embed').each(function(node){node.style.visibility='visible'});},getPageSize:function(){var xScroll,yScroll;if(window.innerHeight&&window.scrollMaxY){xScroll=window.innerWidth+window.scrollMaxX;yScroll=window.innerHeight+window.scrollMaxY;}else if(document.body.scrollHeight>document.body.offsetHeight){xScroll=document.body.scrollWidth;yScroll=document.body.scrollHeight;}else{xScroll=document.body.offsetWidth;yScroll=document.body.offsetHeight;}
var windowWidth,windowHeight;if(self.innerHeight){if(document.documentElement.clientWidth){windowWidth=document.documentElement.clientWidth;}else{windowWidth=self.innerWidth;}
windowHeight=self.innerHeight;}else if(document.documentElement&&document.documentElement.clientHeight){windowWidth=document.documentElement.clientWidth;windowHeight=document.documentElement.clientHeight;}else if(document.body){windowWidth=document.body.clientWidth;windowHeight=document.body.clientHeight;}
if(yScroll<windowHeight){pageHeight=windowHeight;}else{pageHeight=yScroll;}
if(xScroll<windowWidth){pageWidth=xScroll;}else{pageWidth=windowWidth;}
return[pageWidth,pageHeight];}}
document.observe('dom:loaded',function(){new Lightbox();});