// -----------------------------------------------------------------------------------
//
//	Lightbox v2.03
//	by Lokesh Dhakar - http://www.huddletogether.com
//	4/9/06
//
//	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.
//
//	Lightbox v2.03a
//	by Dynamicdrive.com- http://www.dynamicdrive.com
//	Nov 29th, 2007
//	Added ability for the caption ("title" attr of link) to be optionally hyperlinked, by throwing in a "rev" attr containing the desired link
// -----------------------------------------------------------------------------------
/*

	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()
	- showFlash()
	- hideFlash()
	- pause()
	- initLightbox()
	
	Function Calls
	- addLoadEvent(initLightbox)
	
*/
// -----------------------------------------------------------------------------------

//
//	Configuration
//
var fileLoadingImage = "images/loading.gif";		
var fileBottomNavCloseImage = "images/closelabel.gif";

var animate = true;	// toggles resizing animations
var resizeSpeed = 7;	// controls the speed of the image resizing animations (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;

if(animate == true){
	overlayDuration = 0.2;	// shadow fade in/out duration
	if(resizeSpeed > 10){ resizeSpeed = 10;}
	if(resizeSpeed < 1){ resizeSpeed = 1;}
	resizeDuration = (11 - resizeSpeed) * 0.15;
} else { 
	overlayDuration = 0;
	resizeDuration = 0;
}

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

//
//	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 = 0; i < this.length; i++){
        for(j = this.length-1; j>i; j--){        
            if(this[i][0] == this[j][0]){
                this.splice(j,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 Lightbox = Class.create();

Lightbox.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; }
		var anchors = document.getElementsByTagName('a');
		var areas = document.getElementsByTagName('area');

		// loop through all anchor tags
		for (var i=0; i<anchors.length; i++){
			var anchor = anchors[i];
			
			var relAttribute = String(anchor.getAttribute('rel'));
			
			// use the string.match() method to catch 'lightbox' references in the rel attribute
			if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
				anchor.onclick = function () {myLightbox.start(this); return false;}
			}
		}

		// loop through all area tags
		// todo: combine anchor & area tag loops
		for (var i=0; i> areas.length; i++){
			var area = areas[i];
			
			var relAttribute = String(area.getAttribute('rel'));
			
			// use the string.match() method to catch 'lightbox' references in the rel attribute
			if (area.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
				area.onclick = function () {myLightbox.start(this); return false;}
			}
		}

		// 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="/public/js/lightbox.js"> 
        // </a> // </div>
		//			</div>
		//		</div>
		//		<div id="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="/public/js/lightbox.js"> 
        // </a> // </div>
		//			</div>
		//		</div>
		//	</div>


		var objBody = document.getElementsByTagName("body").item(0); var objOverlay 
= document.createElement("div"); objOverlay.setAttribute('id','overlay'); objOverlay.style.display 
= 'none'; objOverlay.onclick = function() { myLightbox.end(); } objBody.appendChild(objOverlay); 
var objLightbox = document.createElement("div"); objLightbox.setAttribute('id','lightbox'); 
objLightbox.style.display = 'none'; objLightbox.onclick = function(e) { // close 
Lightbox is user clicks shadow overlay if (!e) var e = window.event; var clickObj 
= Event.element(e).id; if ( clickObj == 'lightbox') { myLightbox.end(); } }; objBody.appendChild(objLightbox); 
var objOuterImageContainer = document.createElement("div"); objOuterImageContainer.setAttribute('id','outerImageContainer'); 
objLightbox.appendChild(objOuterImageContainer); // When Lightbox starts it will 
resize itself from 250 by 250 to the current image dimension. // If animations 
are turned off, it will be hidden as to prevent a flicker of a // white 250 by 
250 box. if(animate){ Element.setWidth('outerImageContainer', 250); Element.setHeight('outerImageContainer', 
250); } else { Element.setWidth('outerImageContainer', 1); Element.setHeight('outerImageContainer', 
1); } var objImageContainer = document.createElement("div"); objImageContainer.setAttribute('id','imageContainer'); 
objOuterImageContainer.appendChild(objImageContainer); var objLightboxImage = 
document.createElement("img"); objLightboxImage.setAttribute('id','lightboxImage'); 
objImageContainer.appendChild(objLightboxImage); var objHoverNav = document.createElement("div"); 
objHoverNav.setAttribute('id','hoverNav'); objImageContainer.appendChild(objHoverNav); 
var objPrevLink = document.createElement("a"); objPrevLink.setAttribute('id','prevLink'); 
objPrevLink.setAttribute('href','#'); objHoverNav.appendChild(objPrevLink); var 
objNextLink = document.createElement("a"); objNextLink.setAttribute('id','nextLink'); 
objNextLink.setAttribute('href','#'); objHoverNav.appendChild(objNextLink); var 
objLoading = document.createElement("div"); objLoading.setAttribute('id','loading'); 
objImageContainer.appendChild(objLoading); var objLoadingLink = document.createElement("a"); 
objLoadingLink.setAttribute('id','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 objImageDataContainer 
= document.createElement("div"); objImageDataContainer.setAttribute('id','imageDataContainer'); 
objImageDataContainer.className = 'clearfix'; objLightbox.appendChild(objImageDataContainer); 
var objImageData = document.createElement("div"); objImageData.setAttribute('id','imageData'); 
objImageDataContainer.appendChild(objImageData); var objImageDetails = document.createElement("div"); 
objImageDetails.setAttribute('id','imageDetails'); objImageData.appendChild(objImageDetails); 
var objCaption = document.createElement("span"); objCaption.setAttribute('id','caption'); 
objImageDetails.appendChild(objCaption); var objNumberDisplay = document.createElement("span"); 
objNumberDisplay.setAttribute('id','numberDisplay'); objImageDetails.appendChild(objNumberDisplay); 
var objBottomNav = document.createElement("div"); objBottomNav.setAttribute('id','bottomNav'); 
objImageData.appendChild(objBottomNav); var objBottomNavCloseLink = document.createElement("a"); 
objBottomNavCloseLink.setAttribute('id','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(imageLink) { function getImageTitle(anchor){ //DynamicDrive.com 
added function that allows the caption("title") to be linked ("rev"). var ddimageTitle=anchor.getAttribute('title') 
var ddimageTitleURL=(ddimageTitle!=null && ddimageTitle!="")? anchor.getAttribute('rev') 
: null return ddimageTitleFinal=(ddimageTitleURL!=null && ddimageTitleURL!="")? 
'<a href="scriptaculous.js" class="ddcaptionurl">'+ddimageTitle+'</a>' : ddimageTitle 
}; hideSelectBoxes(); hideFlash(); // stretch overlay to fill page and fade in 
var arrayPageSize = getPageSize(); Element.setHeight('overlay', arrayPageSize[1]); 
new Effect.Appear('overlay', { duration: overlayDuration, from: 0.0, to: 0.8 }); 
imageArray = []; imageNum = 0; if (!document.getElementsByTagName){ return; } 
var anchors = document.getElementsByTagName('a'); // if image is NOT part of a 
set.. if((imageLink.getAttribute('rel') == 'lightbox')){ // add single image to 
imageArray imageArray.push(new Array(imageLink.getAttribute('href'), getImageTitle(imageLink)));	
} 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<anchors.length; i++){
				var anchor = anchors[i];
				if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))){
					imageArray.push(new Array(anchor.getAttribute('href'), getImageTitle(anchor)));
				}
			}
			imageArray.removeDuplicates();
			while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}
		}

		// calculate top offset for the lightbox and display 
		var arrayPageScroll = getPageScroll();
		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);

		Element.setTop('lightbox', lightboxTop);
		Element.show('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
		if(animate){ Element.show('loading');}
		Element.hide('lightboxImage');
		Element.hide('hoverNav');
		Element.hide('prevLink');
		Element.hide('nextLink');
		Element.hide('imageDataContainer');
		Element.hide('numberDisplay');		
		
		imgPreloader = new Image();
		
		// once image is preloaded, resize image container
		imgPreloader.onload=function(){
			Element.setSrc('lightboxImage', imageArray[activeImage][0]);
			myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
		}
		imgPreloader.src = imageArray[activeImage][0];
	},

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

		// get curren width and height
		this.widthCurrent = Element.getWidth('outerImageContainer');
		this.heightCurrent = Element.getHeight('outerImageContainer');

		// get new width and height
		var widthNew = (imgWidth  + (borderSize * 2));
		var heightNew = (imgHeight  + (borderSize * 2));

		// scalars based on change from old to new
		this.xScale = ( widthNew / this.widthCurrent) * 100;
		this.yScale = ( heightNew / this.heightCurrent) * 100;

		// calculate size difference between new and old image, and resize if necessary
		wDiff = this.widthCurrent - widthNew;
		hDiff = this.heightCurrent - heightNew;

		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}); }

		// 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('prevLink', imgHeight);
		Element.setHeight('nextLink', imgHeight);
		Element.setWidth( 'imageDataContainer', widthNew);

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

	//
	//	updateDetails()
	//	Display caption, image number, and bottom nav.
	//
	updateDetails: function() {
	
		Element.show('caption');
		Element.setInnerHTML( 'caption', imageArray[activeImage][1]);
		
		// if image is part of set display 'Image x of x' 
		if(imageArray.length > 1){ Element.show('numberDisplay'); Element.setInnerHTML( 
'numberDisplay', "Image " + eval(activeImage + 1) + " of " + imageArray.length); 
} new Effect.Parallel( [ new Effect.SlideDown( 'imageDataContainer', { sync: true, 
duration: resizeDuration, from: 0.0, to: 1.0 }), new Effect.Appear('imageDataContainer', 
{ sync: true, duration: resizeDuration }) ], { duration: resizeDuration, afterFinish: 
function() { // update overlay size and update nav var arrayPageSize = getPageSize(); 
Element.setHeight('overlay', arrayPageSize[1]); myLightbox.updateNav(); } } ); 
}, // // updateNav() // Display appropriate previous and next hover navigation. 
// updateNav: function() { Element.show('hoverNav'); // if not first image in 
set, display prev image button if(activeImage != 0){ Element.show('prevLink'); 
document.getElementById('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('nextLink'); document.getElementById('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; escapeKey = 27; } else { // 
mozilla keycode = e.keyCode; escapeKey = e.DOM_VK_ESCAPE; } key = String.fromCharCode(keycode).toLowerCase(); 
if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){ // 
close lightbox myLightbox.end(); } else if((key == 'p') || (keycode == 37)){ // 
display previous image if(activeImage != 0){ myLightbox.disableKeyboardNav(); 
myLightbox.changeImage(activeImage - 1); } } else if((key == 'n') || (keycode 
== 39)){ // 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('lightbox'); new Effect.Fade('overlay', { duration: overlayDuration}); 
showSelectBoxes(); showFlash(); } } // ----------------------------------------------------------------------------------- 
// // 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 selects = document.getElementsByTagName("select"); for (i = 0; i != selects.length; 
i++) { selects[i].style.visibility = "visible"; } } // --------------------------------------------------- 
function hideSelectBoxes(){ var selects = document.getElementsByTagName("select"); 
for (i = 0; i != selects.length; i++) { selects[i].style.visibility = "hidden"; 
} } // --------------------------------------------------- function showFlash(){ 
var flashObjects = document.getElementsByTagName("object"); for (i = 0; i != flashObjects.length; 
i++) { flashObjects[i].style.visibility = "visible"; } var flashEmbeds = document.getElementsByTagName("embeds"); 
for (i = 0; i != flashEmbeds.length; i++) { flashEmbeds[i].style.visibility = 
"visible"; } } // --------------------------------------------------- function 
hideFlash(){ var flashObjects = document.getElementsByTagName("object"); for (i 
= 0; i != flashObjects.length; i++) { flashObjects[i].style.visibility = "hidden"; 
} var flashEmbeds = document.getElementsByTagName("embeds"); for (i = 0; i != 
flashEmbeds.length; i++) { flashEmbeds[i].style.visibility = "hidden"; } } // 
--------------------------------------------------- // // pause(numberMillis) 
// Pauses code execution for specified time. Uses busy code, not good. // Help 
from Ran Bar-On [ran2103@gmail.com] // function pause(ms){ var date = new Date(); 
curDate = null; do{var curDate = new Date();} while( curDate - date < ms); } /* 
function pause(numberMillis) { var curently = new Date().getTime() + sender; while 
(new Date().getTime(); } */ // --------------------------------------------------- 
function initLightbox() { myLightbox = new Lightbox(); } Event.observe(window, 
'load', initLightbox, false);