// -----------------------------------------------------------------------------------
//
//	Lightbox v2.02
//	by Lokesh Dhakar - http://www.huddletogether.com
//	3/31/06
//
//	For more information on this script, visit:
//	http://huddletogether.com/projects/lightbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//
//	Credit also due to those who have helped, inspired, and made their code available to the public.
//	Including: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.org), Thomas Fuchs(mir.aculo.us), and others.
//
//
// -----------------------------------------------------------------------------------


var fileLoadingImage = "/img/lightbox/loading.gif";
var fileCloseImage = "/img/lightbox/closelabel.gif";

var resizeSpeed = 7;

var borderSize = 10;

var imageArray = new Array;
var activeImage;
var shownInstructions = false;

if(resizeSpeed > 10){ resizeSpeed = 10;}
if(resizeSpeed < 1){ resizeSpeed = 6;}
resizeDuration = (11 - resizeSpeed) * 0.15;

Object.extend(Element, {
	getWidth: function(element) {
		element = $(element);
		return element.offsetWidth;
	},
	setWidth: function(element,w) {
		element = $(element);
		element.style.width = w +"px";
	},
	setHeight: function(element,h) {
		element = $(element);
		element.style.height = h +"px";
	},
	setTop: function(element,t) {
		element = $(element);
		element.style.top = t +"px";
	},
	setSrc: function(element,src) {
		element = $(element);
		element.src = src;
	},
	setHref: function(element,href) {
		element = $(element);
		element.href = href;
	},
	setInnerHTML: function(element,content) {
		element = $(element);
		element.innerHTML = content;
	}
});

Array.prototype.removeDuplicates = function () {
	for(i = 1; i < this.length; i++){
		if(this[i][0] == this[i-1][0]){
			this.splice(i,1);
		}
	}
}

Array.prototype.empty = function () {
	for(i = 0; i <= this.length; i++){
		this.shift();
	}
}

var Lightbox = Class.create();

Lightbox.prototype = {
	lang: {
		back: 'back',
		next: 'next',
		image: 'image',
		close: 'close'
	},

	initialize: function() {
		if (!document.getElementsByTagName){ return; }
		var anchors = document.getElementsByTagName('a');

		for (var i=0; i<anchors.length; i++){
			var anchor = anchors[i];

			var relAttribute = String(anchor.getAttribute('rel'));

			if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
				anchor.onclick = function () {myLightbox.start(this); return false;}
			}
		}

		var objBody = document.getElementsByTagName("body").item(0);

		var objOverlay = document.createElement("div");
		objOverlay.setAttribute('id','lightbox2Overlay');
		objOverlay.style.display = 'none';
		objOverlay.onclick = function() { myLightbox.end(); return false; }
		objBody.appendChild(objOverlay);

		var objLightbox = document.createElement("div");
		objLightbox.setAttribute('id','lightbox2');
		objLightbox.style.display = 'none';

		var objTopNav = document.createElement("div");
		objTopNav.setAttribute('id','lightbox2TopNav');
		objLightbox.appendChild(objTopNav);

		var objCloseLink = document.createElement("a");
		objCloseLink.setAttribute('id', 'lightbox2Close');
		objCloseLink.setAttribute('title', this.lang.close);
		objCloseLink.setAttribute('href','#');
		objCloseLink.onclick = function() { myLightbox.end(); return false; }
		objTopNav.appendChild(objCloseLink);

		var objOuterImageContainer = document.createElement("div");
		objOuterImageContainer.setAttribute('id','lightbox2OuterImageContainer');
		objLightbox.appendChild(objOuterImageContainer);

		var objCloseImage = document.createElement("img");
		objCloseImage.setAttribute('src', fileCloseImage);
		objCloseLink.appendChild(objCloseImage);

		var objImageContainer = document.createElement("div");
		objImageContainer.setAttribute('id','lightbox2ImageContainer');
		objOuterImageContainer.appendChild(objImageContainer);

		var objInlineContainer = document.createElement("div");
		objInlineContainer.setAttribute('id','lightbox2InlineContainer');
		objImageContainer.appendChild(objInlineContainer);

		var objLightboxImage = document.createElement("img");
		objLightboxImage.setAttribute('id','lightbox2Image');
		objImageContainer.appendChild(objLightboxImage);

		var objLoading = document.createElement("div");
		objLoading.setAttribute('id','lightbox2Loading');
		objImageContainer.appendChild(objLoading);

		var objLoadingLink = document.createElement("a");
		objLoadingLink.setAttribute('id','lightbox2LoadingLink');
		objLoadingLink.setAttribute('href','#');
		objLoadingLink.onclick = function() { myLightbox.end(); return false; }
		objLoading.appendChild(objLoadingLink);

		var objLoadingImage = document.createElement("img");
		objLoadingImage.setAttribute('src', fileLoadingImage);
		objLoadingLink.appendChild(objLoadingImage);

		var objImageDataContainer = document.createElement("div");
		objImageDataContainer.setAttribute('id','lightbox2ImageDataContainer');
		objImageDataContainer.className = 'clearfix';
		objLightbox.appendChild(objImageDataContainer);

		var objImageData = document.createElement("div");
		objImageData.setAttribute('id','lightbox2ImageData');
		objImageDataContainer.appendChild(objImageData);

		var objImageDetails = document.createElement("div");
		objImageDetails.setAttribute('id','lightbox2ImageDetails');
		objImageData.appendChild(objImageDetails);

		var objCaption = document.createElement("span");
		objCaption.setAttribute('id','lightbox2Caption');
		objImageDetails.appendChild(objCaption);

		var objNav = document.createElement("div");
		objNav.setAttribute('id','lightbox2Nav');
		objImageDetails.appendChild(objNav);

		var objPrevLink = document.createElement("a");
		objPrevLink.setAttribute('id','lightbox2PrevLink');
		objPrevLink.setAttribute('href','#');
		objPrevLink.appendChild(document.createTextNode(this.lang.back));
		objNav.appendChild(objPrevLink);

		var objNextLink = document.createElement("a");
		objNextLink.setAttribute('id','lightbox2NextLink');
		objNextLink.setAttribute('href','#');
		objNextLink.appendChild(document.createTextNode(this.lang.next));
		objNav.appendChild(objNextLink);

		var objNumberDisplay = document.createElement("span");
		objNumberDisplay.setAttribute('id','lightbox2NumberDisplay');
		objNav.appendChild(objNumberDisplay);

		var objHoverNav = document.createElement("div");
		objHoverNav.setAttribute('id','lightbox2HoverNav');
//		objImageContainer.appendChild(objHoverNav);
		objImageDetails.appendChild(objHoverNav);
//
//		var objPrevLink = document.createElement("a");
//		objPrevLink.setAttribute('id','lightbox2PrevLink');
//		objPrevLink.setAttribute('href','#');
//		objPrevLink.appendChild(document.createTextNode(this.lang.back));
//		objHoverNav.appendChild(objPrevLink);
//
//		var objNextLink = document.createElement("a");
//		objNextLink.setAttribute('id','lightbox2NextLink');
//		objNextLink.setAttribute('href','#');
//		objNextLink.appendChild(document.createTextNode(this.lang.next));
//		objHoverNav.appendChild(objNextLink);

		// Ganz am Ende, damit die Seite nur einmal neu gererndert werden muss!
		objBody.appendChild(objLightbox);
	},

	start: function(imageLink) {

		hideSelectBoxes();

		var arrayPageSize = getPageSize();
		Element.setHeight('lightbox2Overlay', arrayPageSize[1]);
		new Effect.Appear('lightbox2Overlay', { duration: 0.2, from: 0.0, to: 0.8 });

		imageArray = [];
		tempArray = [];
		imageNum = 0;

		if (!document.getElementsByTagName){ return; }
		var anchors = document.getElementsByTagName('a');


		var arrayPageSize = getPageSize();
		var heightOffset = 56; // Für die Bedienelemente oben und unten
		var getLink = function(href) {
			aTempImageLink = href.split('?');
			if (aTempImageLink.length == 3) {
				if (arrayPageSize[2] > 1400 && arrayPageSize[3] - heightOffset > 900) {
					href = aTempImageLink[0];
				}
				else if (arrayPageSize[2] > 1024 && arrayPageSize[3] - heightOffset > 768) {
					href = aTempImageLink[1];
				}
				else {
					href = aTempImageLink[2];
				}
			}
			return href;
		};

		var modifyTitle = function(title) {
			var captions = title.split(' :: ');
			if (captions.length > 1) {
				var id = captions[1];
				var container = $(id);
				title = captions[0] + container.innerHTML;
			}
			return title;
		};

		if((imageLink.getAttribute('rel') == 'lightbox')){
			tempArray.push(new Array(getLink(imageLink.getAttribute('href')), modifyTitle(imageLink.getAttribute('title'))));
			Element.hide('lightbox2Nav');
		} else {
			for (var i=0; i<anchors.length; i++){
				var anchor = anchors[i];
				var href = anchor.getAttribute('href',2);
				if (href && href != '#' && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))){
					tempArray.push(new Array(getLink(href), modifyTitle(anchor.getAttribute('title'))));
					if (anchor == imageLink) {
						imageNum = tempArray.length - 1;
					}
				}
			}
			tempArray.removeDuplicates();
			Element.show('lightbox2Nav');
		}

		var arrayPageScroll = getPageScroll();
		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 100);

		imageArray = tempArray;

		Element.setTop('lightbox2', lightboxTop);
		Element.show('lightbox2');
		this.changeImage(imageNum);
	},

	getPrefix: function(filename) {
		var pos = filename.lastIndexOf('.');
		if (pos == -1 || pos >= filename.length) return '';
		return filename.substr(pos+1);
	},

	// Save the state of the checkbox
	backupCaption: function() {
		var caption = $('lightbox2Caption');
		if (activeImage != undefined) {
			var caption = $('lightbox2Caption');
			if (caption.innerHTML) {
				imageArray[activeImage][1] = caption.innerHTML;
			}
		}
	},

	changeImage: function(imageNum) {
		this.backupCaption();

		activeImage = imageNum;
		Element.show('lightbox2Loading');
		Element.hide('lightbox2Image');
		Element.hide('lightbox2InlineContainer');
		Element.hide('lightbox2HoverNav');
		Element.hide('lightbox2PrevLink');
		Element.hide('lightbox2NextLink');
		Element.hide('lightbox2ImageDataContainer');
		Element.hide('lightbox2TopNav');
//		Element.hide('lightbox2NumberDisplay');

		this.isImage = false;
		var src = imageArray[activeImage][0];

		var isInline = (src.charAt(0) == '#');
		var parts = src.split('?');
		var prefix = this.getPrefix(parts[0]);
		var isFlash = (prefix == 'swf');
		var params = {};
		if (parts.length > 1) {
			var params = parts[1].toQueryParams()
			var width  = Math.ceil(params.width);
			var height = Math.ceil(params.height);
		}

		var inlineContainer = $('lightbox2InlineContainer');
		var lightboxImage = $('lightbox2Image');

		if (isInline) {
			var id = parts[0].substr(1); // '#' entfernen

			var container = $(id);

			Insertion.Top("lightbox2InlineContainer", container.innerHTML);
			if (width && height) {
				myLightbox.resizeImageContainer(width, height);
			}

		} else if (isFlash) {
			var so = new SWFObject(src, "lightbox2Flash", params.width, params.height, "8", "#FFFFFF", false);
			//so.addParam('wmode', 'opaque');
			so.write("lightbox2InlineContainer");

			if (width && height) {
				myLightbox.resizeImageContainer(width, height);
			}

		} else {
			this.isImage = true;
			inlineContainer.innerHTML = '';
			var imgPreloader = new Image();

			imgPreloader.onload=function(){
				Element.setSrc('lightbox2Image', src);
				myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
			}
			imgPreloader.src = src;
		}
	},

	resizeImageContainer: function( imgWidth, imgHeight) {

		this.wCur = Element.getWidth('lightbox2OuterImageContainer');
		this.hCur = Element.getHeight('lightbox2OuterImageContainer');

		this.xScale = ((imgWidth  + (borderSize * 2)) / this.wCur) * 100;
		this.yScale = ((imgHeight  + (borderSize * 2)) / this.hCur) * 100;

		wDiff = (this.wCur - borderSize * 2) - imgWidth;
		hDiff = (this.hCur - borderSize * 2) - imgHeight;
		Element.hide('lightbox2TopNav');

		if(!( hDiff == 0)){ new Effect.Scale('lightbox2OuterImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
		if(!( wDiff == 0)){
			var topNavWidth = Element.getWidth('lightbox2TopNav');
			var xNavScale = imgWidth / topNavWidth * 100;
			new Effect.Parallel([
//				new Effect.Scale('lightbox2TopNav', xNavScale, {sync: true, scaleY: false}),
				new Effect.Scale('lightbox2OuterImageContainer', this.xScale, {sync: true, scaleY: false})
			], {delay: resizeDuration, duration: resizeDuration});
		}

		if((hDiff == 0) && (wDiff == 0)){
			if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);}
		}

//		Element.setHeight('lightbox2PrevLink', imgHeight);
//		Element.setHeight('lightbox2NextLink', imgHeight);
		Element.setWidth( 'lightbox2ImageDataContainer', imgWidth + (borderSize * 2));
		Element.setWidth( 'lightbox2TopNav', imgWidth);

		this.showImage();
	},

	showImage: function(){

		Element.hide('lightbox2Loading');
		if (this.isImage) {
			new Effect.Appear('lightbox2Image', { duration: 0.5, queue: 'end', afterFinish: function(){	myLightbox.updateDetails(); } });
		} else {
			myLightbox.updateDetails();
		}
		this.preloadNeighborImages();
	},

	updateDetails: function() {

		Element.setInnerHTML('lightbox2Caption', imageArray[activeImage][1]);
		Element.setInnerHTML('lightbox2NumberDisplay', this.lang.image.replace('{$cPage}', eval(activeImage + 1)).replace('{$imgCount}', imageArray.length));
		Element.show('lightbox2Caption');

		new Effect.Parallel(
			[
			new Effect.SlideDown( 'lightbox2ImageDataContainer', { sync: true, duration: resizeDuration + 0.25, from: 0.0, to: 1.0 }),
			new Effect.SlideDown('lightbox2TopNav', {sync:true }),
			new Effect.Appear('lightbox2ImageDataContainer', { sync: true, duration: 1.0 }) ],
			{ duration: 0.65, queue: 'end', afterFinish: function() {
				myLightbox.updateNav();
				if (!this.isImage) {
					new Effect.Appear('lightbox2InlineContainer', { duration: 0.5, queue: 'end'});
				}
			} }
		);

	},

	updateNav: function() {
		Element.show('lightbox2HoverNav');

		if(activeImage != 0){
			Element.show('lightbox2PrevLink');
			document.getElementById('lightbox2PrevLink').onclick = function() {
				myLightbox.changeImage(activeImage - 1); return false;
			}
		}

		if(activeImage != (imageArray.length - 1)){
			Element.show('lightbox2NextLink');
			document.getElementById('lightbox2NextLink').onclick = function() {
				myLightbox.changeImage(activeImage + 1); return false;
			}
		}

		this.enableKeyboardNav();
	},

	enableKeyboardNav: function() {
		document.onkeydown = this.keyboardAction;
	},

	disableKeyboardNav: function() {
		document.onkeydown = '';
	},

	keyboardAction: function(e) {
		if (e == null) { // ie
			keycode = event.keyCode;
		} else { // mozilla
			keycode = e.which;
		}

		key = String.fromCharCode(keycode).toLowerCase();

		if((key == 'x') || (key == 'a')){
			myLightbox.end();
		} else if((key == 'z') || (key == 'b') || (key == 'p')){
			if(activeImage != 0){
				myLightbox.disableKeyboardNav();
				myLightbox.changeImage(activeImage - 1);
			}
		} else if((key == 'v') || (key == 'n')){
			if(activeImage != (imageArray.length - 1)){
				myLightbox.disableKeyboardNav();
				myLightbox.changeImage(activeImage + 1);
			}
		}
	},


	preloadNeighborImages: function(){

		if((imageArray.length - 1) > activeImage){
			preloadNextImage = new Image();
			preloadNextImage.src = imageArray[activeImage + 1][0];
		}
		if(activeImage > 0){
			preloadPrevImage = new Image();
			preloadPrevImage.src = imageArray[activeImage - 1][0];
		}

	},

	end: function() {
		this.disableKeyboardNav();
		$('lightbox2InlineContainer').innerHTML = '';
		Element.hide('lightbox2');
		Element.hide('lightbox2InlineContainer');
		new Effect.Fade('lightbox2Overlay', { duration: 0.2});
		showSelectBoxes();
	}
}

function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll)
	return arrayPageScroll;
}

function getPageSize(){

	var xScroll, yScroll;

	if (window.innerHeight && window.scrollMaxY) {
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}

	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}

	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else {
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
	return arrayPageSize;
}

function getKey(e){
	if (e == null) { // ie
		keycode = event.keyCode;
	} else { // mozilla
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();

	if(key == 'x'){
	}
}

function listenKey () {	document.onkeypress = getKey; }

function showSelectBoxes(){
	selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}
	flashs = document.getElementsByTagName("object");
	for (i = 0; i != flashs.length; i++) {
		flashs[i].style.visibility = "visible";
	}
}

function hideSelectBoxes(){
	selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "hidden";
	}
	flashs = document.getElementsByTagName("object");
	for (i = 0; i != flashs.length; i++) {
		flashs[i].style.visibility = "hidden";
	}
}

function pause(numberMillis) {
	var now = new Date();
	var exitTime = now.getTime() + numberMillis;
	while (true) {
		now = new Date();
		if (now.getTime() > exitTime)
			return;
	}
}

function initLightbox() { myLightbox = new Lightbox(); }
Event.observe(window, 'load', initLightbox, false);