// -----------------------------------------------------------------------------------
//
//	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.
//
//
// -----------------------------------------------------------------------------------
/*

	Table of Contents
	-----------------
	Configuration
	Global Variables

	Extending Built-in Objects
	- Object.extend(Element)
	- Array.prototype.removeDuplicates()
	- Array.prototype.empty()

	Lightbox Class Declaration
	- initialize()
	- start()
	- changeImage()
	- resizeImageContainer()
	- showImage()
	- updateDetails()
	- updateNav()
	- enableKeyboardNav()
	- disableKeyboardNav()
	- keyboardAction()
	- preloadNeighborImages()
	- end()

	Miscellaneous Functions
	- getPageScroll()
	- getPageSize()
	- getKey()
	- listenKey()
	- showSelectBoxes()
	- hideSelectBoxes()
	- pause()
	- initLightbox()

	Function Calls
	- addLoadEvent(initLightbox)

*/
// -----------------------------------------------------------------------------------

//
//	Configuration
//
var fileLoadingImage = ttDeskURL+"/image/loading.gif";
var fileBottomNavCloseImage = ttDeskURL+"/image/closelabel.gif";

var resizeSpeed = 7;	// controls the speed of the image resizing (1=slowest and 10=fastest)

var borderSize = 10;	//if you adjust the padding in the CSS, you will need to update this variable

// -----------------------------------------------------------------------------------

//
//	Global Variables
//
var imageArray = new Array;
var activeImage;
var pagelightboxSize = new Array;
if(resizeSpeed > 10){ resizeSpeed = 10;}
if(resizeSpeed < 1){ resizeSpeed = 1;}
resizeDuration = (11 - resizeSpeed) * 0.15;

// -----------------------------------------------------------------------------------

//
//	Additional methods for Element added by SU, Couloir
//	- further additions by Lokesh Dhakar (huddletogether.com)
//
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;
	}
});

// -----------------------------------------------------------------------------------

//
//	Extending built-in Array object
//	- array.removeDuplicates()
//	- array.empty()
//
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();
	}
}

// -----------------------------------------------------------------------------------

//
//	Lightbox Class Declaration
//	- initialize()
//	- start()
//	- changeImage()
//	- resizeImageContainer()
//	- showImage()
//	- updateDetails()
//	- updateNav()
//	- enableKeyboardNav()
//	- disableKeyboardNav()
//	- keyboardNavAction()
//	- preloadNeighborImages()
//	- end()
//
//	Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
//
var ttDeskLightbox = Class.create();

ttDeskLightbox.prototype = {

	// initialize()
	// Constructor runs on completion of the DOM loading. Loops through anchor tags looking for
	// 'lightbox' references and applies onclick events to appropriate links. The 2nd section of
	// the function inserts html at the bottom of the page which is used to display the shadow
	// overlay and the image container.
	//
	initialize: function() {
		if (!document.getElementsByTagName){ return; }

		// The rest of this code inserts html at the bottom of the page that looks similar to this:
		//
		//	<div id="overlay"></div>
		//	<div id="lightbox">
		//		<div id="outerImageContainer">
		//			<div id="imageContainer">
		//				<img id="lightboxImage">
		//				<div style="" id="hoverNav">
		//					<a href="#" id="prevLink"></a>
		//					<a href="#" id="nextLink"></a>
		//				</div>
		//				<div id="loading">
		//					<a href="#" id="loadingLink">
		//						<img src="images/loading.gif">
		//					</a>
		//				</div>
		//			</div>
		//		</div>
		//		<divd="imageDataContainer">
		//			<div id="imageData">
		//				<div id="imageDetails">
		//					<span id="caption"></span>
		//					<span id="numberDisplay"></span>
		//				</div>
		//				<div id="bottomNav">
		//					<a href="#" id="bottomNavClose">
		//						<img src="images/close.gif">
		//					</a>
		//				</div>
		//			</div>
		//		</div>
		//	</div>


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

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

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

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

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

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

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

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

		var objPrevLink = document.createElement("a");
		objPrevLink.setAttribute('id','ttLightbox_prevLink');
		objPrevLink.setAttribute('href','');
		objHoverNav.appendChild(objPrevLink);

		var objNextLink = document.createElement("a");
		objNextLink.setAttribute('id','ttLightbox_nextLink');
		objNextLink.setAttribute('href','');
		objHoverNav.appendChild(objNextLink);

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

		var objLoadingLink = document.createElement("a");
		objLoadingLink.setAttribute('id','ttLightbox_loadingLink');
		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 objImageData = document.createElement("div");
		objImageData.setAttribute('id','ttLightbox_imageData');
		objImageDataContainer.appendChild(objImageData);

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

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

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

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

		var objBottomNavCloseLink = document.createElement("a");
		objBottomNavCloseLink.setAttribute('id','ttLightbox_bottomNavClose');
		objBottomNavCloseLink.setAttribute('href','');
		objBottomNavCloseLink.onclick = function() { myLightbox.end(); return false; }
		objBottomNav.appendChild(objBottomNavCloseLink);

		var objBottomNavCloseImage = document.createElement("img");
		objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
		objBottomNavCloseLink.appendChild(objBottomNavCloseImage);

	},

	//
	//	start()
	//	Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
	//
	start: function(thisimg) {

		hideSelectBoxes();
		// stretch overlay to fill page and fade in
		var arrayPageSize = getPageSize();
		pagelightboxSize[0] =arrayPageSize[2];
		pagelightboxSize[1] =arrayPageSize[3];

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

		imageArray = new Array;
		imageNum = 0;

		if (!document.getElementsByName){ return; }
		var srcs = document.getElementsByName('td_slidesrc');

		// if image is NOT part of a set..
/*		if((imageLink.getAttribute('rel') == 'lightbox')){
			// add single image to imageArray
			imageArray.push(new Array(imageLink.getAttribute('src'), imageLink.getAttribute('alt')));
		} else {*/
		// if image is part of a set..

			// loop through anchors, find other images in set, and add them to imageArray
			for (var i=0; i<srcs.length; i++){
				var tmp = srcs[i].value;
				var imgs = tmp.split("||");
				imgsrc = imgs[0];
				imgtitle = imgs[1];
				imglink = imgs[2];
				if (imgsrc !=""){
					imageArray.push(new Array(imgsrc, imgtitle,imglink));
					if(imgsrc == thisimg)	{
						imageNum = i;
					}
				}
			}
			imageArray.removeDuplicates();

		// calculate top offset for the lightbox and display
		//var arrayPageSize = getPageSize();
		var arrayPageScroll = getPageScroll();
		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 30);

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

	//
	//	changeImage()
	//	Hide most elements and preload image in preparation for resizing image container.
	//
	changeImage: function(imageNum) {

		activeImage = imageNum;	// update global var

		// hide elements during transition
		Element.show('ttLightbox_loading');
		Element.hide('ttLightbox_lightboxImage');
		Element.hide('ttLightbox_hoverNav');
		Element.hide('ttLightbox_prevLink');
		Element.hide('ttLightbox_nextLink');
//		Element.hide('imageDataContainer');
//		Element.hide('numberDisplay');

		imgPreloader = new Image();

		// once image is preloaded, resize image container
		imgPreloader.onload=function(){
			Element.setSrc('ttLightbox_lightboxImage', imageArray[activeImage][0]);
			origw = imgPreloader.width;
			origh = imgPreloader.height;
			targw = pagelightboxSize[0];
			targh = pagelightboxSize[1];
			var ratio = 1.0;
			if ((origw >= targw || origh >= targh) && origh && origw){
				ratio = ((targw / origw) < (targh / origh)) ? targw / origw : targh / origh;
			}

			imgwidth  = Math.floor(origw * ratio);
			imgheight = Math.floor(origh * ratio);
			Element.setWidth('ttLightbox_lightboxImage',imgwidth);
			Element.setHeight('ttLightbox_lightboxImage',imgheight);
			myLightbox.resizeImageContainer(imgwidth, imgheight);
		}
		imgPreloader.src = imageArray[activeImage][0];
	},

	//
	//	resizeImageContainer()
	//
	resizeImageContainer: function( imgWidth, imgHeight) {

		// get current height and width
		this.wCur = Element.getWidth('ttLightbox_outerImageContainer');
		this.hCur = Element.getHeight('ttLightbox_outerImageContainer');

		// scalars based on change from old to new
		this.xScale = ((imgWidth  + (borderSize * 2)) / this.wCur) * 100;
		this.yScale = ((imgHeight  + (borderSize * 2)) / this.hCur) * 100;

		// calculate size difference between new and old image, and resize if necessary
		wDiff = (this.wCur - borderSize * 2) - imgWidth;
		hDiff = (this.hCur - borderSize * 2) - imgHeight;

//		if(!( hDiff == 0)){ new Effect.Scale('outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
//		if(!( wDiff == 0)){ new Effect.Scale('outerImageContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration}); }

		Element.setHeight('ttLightbox_outerImageContainer', imgHeight + (borderSize * 2));
		Element.setWidth('ttLightbox_outerImageContainer', imgWidth + (borderSize * 2));
		Element.show('ttLightbox_outerImageContainer');
		// if new and old image are same size and no scaling transition is necessary,
		// do a quick pause to prevent image flicker.
		if((hDiff == 0) && (wDiff == 0)){
			if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);}
		}

		Element.setHeight('ttLightbox_prevLink', imgHeight);
		Element.setHeight('ttLightbox_nextLink', imgHeight);
		Element.setWidth( 'ttLightbox_imageDataContainer', imgWidth + (borderSize * 2));

		this.showImage();
	},

	//
	//	showImage()
	//	Display image and begin preloading neighbors.
	//
	showImage: function(){
		Element.hide('ttLightbox_loading');
		myLightbox.updateDetails();
		new Effect.Appear('ttLightbox_lightboxImage', { duration: 0.5, queue: 'end', afterFinish: function(){	 } });
		this.preloadNeighborImages();
	},

	//
	//	updateDetails()
	//	Display caption, image number, and bottom nav.
	//
	updateDetails: function() {

		Element.show('ttLightbox_lightboxcaption');
		caption = "<a href='"+imageArray[activeImage][2]+"'>"+imageArray[activeImage][1]+"</a>";
		Element.setInnerHTML( 'ttLightbox_lightboxcaption', caption);

		// if image is part of set display 'Image x of x'
		if(imageArray.length > 1){
			Element.show('ttLightbox_numberDisplay');
			Element.setInnerHTML( 'ttLightbox_numberDisplay', "Image " + eval(activeImage + 1) + " of " + imageArray.length);
		}
		//Element.show('imageDataContainer');
		/*new Effect.Parallel(
			[ new Effect.SlideDown( 'imageDataContainer', { sync: true, duration: resizeDuration + 0.25, from: 0.0, to: 1.0 }),
			  new Effect.Appear('imageDataContainer', { sync: true, duration: 1.0 }) ],
			{ duration: 0.65, afterFinish: function() { myLightbox.updateNav();} }
		);*/
		 myLightbox.updateNav();
	},

	//
	//	updateNav()
	//	Display appropriate previous and next hover navigation.
	//
	updateNav: function() {

		Element.show('ttLightbox_hoverNav');

		// if not first image in set, display prev image button
		if(activeImage != 0){
			Element.show('ttLightbox_prevLink');
			document.getElementById('ttLightbox_prevLink').onclick = function() {
				myLightbox.changeImage(activeImage - 1); return false;
			}
		}

		// if not last image in set, display next image button
		if(activeImage != (imageArray.length - 1)){
			Element.show('ttLightbox_nextLink');
			document.getElementById('ttLightbox_nextLink').onclick = function() {
				myLightbox.changeImage(activeImage + 1); return false;
			}
		}

		this.enableKeyboardNav();
	},

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

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

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

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

		if((key == 'x') || (key == 'o') || (key == 'c')){	// close lightbox
			myLightbox.end();
		} else if(key == 'p'){	// display previous image
			if(activeImage != 0){
				myLightbox.disableKeyboardNav();
				myLightbox.changeImage(activeImage - 1);
			}
		} else if(key == 'n'){	// display next image
			if(activeImage != (imageArray.length - 1)){
				myLightbox.disableKeyboardNav();
				myLightbox.changeImage(activeImage + 1);
			}
		}


	},

	//
	//	preloadNeighborImages()
	//	Preload previous and next images.
	//
	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()
	//
	end: function() {
		this.disableKeyboardNav();
		Element.hide('ttLightbox_lightbox');
		new Effect.Fade('ttLightbox_overlay', { duration: 0.2});
		showSelectBoxes();
	}
}

// -----------------------------------------------------------------------------------

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
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;
}

// -----------------------------------------------------------------------------------

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
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;
}

// -----------------------------------------------------------------------------------

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//
function getKey(e){
	if (e == null) { // ie
		keycode = event.keyCode;
	} else { // mozilla
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();

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

// -----------------------------------------------------------------------------------

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

// ---------------------------------------------------

function showSelectBoxes(){
	var tags = ['select','embed','object'];
	for (var i=0,n=tags.length;i<n;i++)
	{
		objs = document.getElementsByTagName(tags[i]);
			for (var j = 0; j != objs.length; j++) {
				objs[j].style.visibility = "visible";
			}
	}
}

// ---------------------------------------------------

function hideSelectBoxes(){
	var tags = ['select','embed','object'];
	for (var i=0,n=tags.length;i<n;i++)
	{
		objs = document.getElementsByTagName(tags[i]);
			for (var j = 0; j != objs.length; j++) {
				objs[j].style.visibility = "hidden";
			}
	}

}

// ---------------------------------------------------

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
//
function pause(numberMillis) {
	var now = new Date();
	var exitTime = now.getTime() + numberMillis;
	while (true) {
		now = new Date();
		if (now.getTime() > exitTime)
			return;
	}
}

// ---------------------------------------------------



function ttDesk_initLightbox(imglink) {
	myLightbox= new ttDeskLightbox();
	myLightbox.start(imglink);
}