// -----------------------------------------------------------------------------------
//
//	Lightbox v2.02
//	by Lokesh Dhakar - http://www.huddletogether.com
//	3/31/06
//
//  modified by Andreas Albarello, 12/28/06
//
//	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.
//
//
// -----------------------------------------------------------------------------------


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

//
//	Global Variables
//
var imageArray = new Array;
var orderedArray = new Array;
var activeImage;
var myLightbox = null;



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

//
//	Additional methods for Element added by SU, Couloir
//	- further additions by Lokesh Dhakar (huddletogether.com)
//
Object.extend(Element, {
	hide: function() {
		for (var i = 0; i < arguments.length; i++) {
			var element = $(arguments[i]);
			element.style.display = 'none';
		}
	},
	show: function() {
		for (var i = 0; i < arguments.length; i++) {
			var element = $(arguments[i]);
			element.style.display = '';
		}
	},
	getWidth: function(element) {
	   	element = $(element);
	   	return element.offsetWidth; 
	},
	setWidth: function(element,w) {
	   	element = $(element);
		element.style.width = w +"px";
	},
	getHeight: function(element) {
		element = $(element);
		return element.offsetHeight;
	},
	setHeight: function(element,h) {
   		element = $(element);
		element.style.height = h +"px";
	},
	setTop: function(element,t) {
	   	element = $(element);
		element.style.top = t +"px";
	},
  getSrc: function(element) {
    element = $(element);
    return element.src;
  },
	setSrc: function(element,src) {
		element = $(element);
		element.src = src; 
	},
	setInnerHTML: function(element,content) {
		element = $(element);
		element.innerHTML = content;
	},
  setOpacity: function(element,opacity) {
    element = $(element);
    element.style.opacity = opacity;
  }
});

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

//
//	Extending built-in Array object
//
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();
	}
}

// -----------------------------------------------------------------------------------
//
//	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');

		// 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; }
			}
		}

		var objBody = document.getElementsByTagName("body").item(0);
		
		var objOverlay = document.createElement("div");
		objOverlay.setAttribute('id','overlay');
		objOverlay.onclick = function () { myLightbox.end(); return false; }
		objBody.appendChild(objOverlay);
		
		var objLightbox = document.createElement("div");
		objLightbox.setAttribute('id','lightbox');
		objLightbox.style.display = 'none';
		objBody.appendChild(objLightbox);
    
		var objSlideshowHeader = document.createElement("div");
		objSlideshowHeader.setAttribute('id','slideshowheader');
		objSlideshowHeader.style.display = 'none';
		objBody.appendChild(objSlideshowHeader);
    
		var objSlideshowHeaderLeft = document.createElement("div");
		objSlideshowHeaderLeft.setAttribute('id','slh_left');
    objSlideshowHeaderLeft.appendChild(document.createTextNode(title));
    objSlideshowHeader.appendChild(objSlideshowHeaderLeft);
    
		var objSlideshowHeaderRight = document.createElement("div");
		objSlideshowHeaderRight.setAttribute('id','slh_right');
		objSlideshowHeaderRight.setAttribute('class','slheader');    
		objSlideshowHeader.appendChild(objSlideshowHeaderRight);    
    var objSlideshowHeaderRightA = document.createElement("a");
    objSlideshowHeaderRightA.setAttribute('id', 'slh_right_a'); 
    objSlideshowHeaderRightA.setAttribute('href', '#');
    objSlideshowHeaderRightA.onclick = function () { myLightbox.end(); return false; }
    objSlideshowHeaderRight.appendChild(objSlideshowHeaderRightA);  
    var objSlideshowHeaderRightImg = document.createElement("img");
    objSlideshowHeaderRightImg.setAttribute('id', 'slh_right_img');     
    objSlideshowHeaderRightImg.src = "/images/close.gif";
		objSlideshowHeaderRightImg.setAttribute('class','slheaderimg');        
    objSlideshowHeaderRightImg.setAttribute('border', '0');       
    objSlideshowHeaderRightA.appendChild(objSlideshowHeaderRightImg);

    var objSlideshowHeaderCenter = document.createElement("div");
		objSlideshowHeaderCenter.setAttribute('id','slh_center');
		objSlideshowHeaderCenter.setAttribute('class','slheader');        
    objSlideshowHeader.appendChild(objSlideshowHeaderCenter);
    var objSlideshowHeaderCenterAPrev = document.createElement("a");
    objSlideshowHeaderCenterAPrev.setAttribute('id', 'slh_center_prev_a');
    objSlideshowHeaderCenterAPrev.setAttribute('href', '#');     
    objSlideshowHeaderCenterAPrev.onclick = function () { myLightbox.prevImage(); return false; }
    objSlideshowHeaderCenter.appendChild(objSlideshowHeaderCenterAPrev);
    var objSlideshowHeaderCenterImgPrev = document.createElement("img");
    objSlideshowHeaderCenterImgPrev.src = "/images/prev.gif";
    objSlideshowHeaderCenterImgPrev.setAttribute('id', 'slh_center_prev_img');        
		objSlideshowHeaderCenterImgPrev.setAttribute('class','slheaderimg');
    objSlideshowHeaderCenterImgPrev.setAttribute('border', '0');    
    objSlideshowHeaderCenterAPrev.appendChild(objSlideshowHeaderCenterImgPrev);
    var objSlideshowHeaderCenterANext = document.createElement("a");
    objSlideshowHeaderCenterANext.setAttribute('id', 'slh_center_next_a');        
    objSlideshowHeaderCenterANext.setAttribute('href', '#'); 
    objSlideshowHeaderCenterANext.onclick = function () { myLightbox.nextImage(); return false; }
    objSlideshowHeaderCenter.appendChild(objSlideshowHeaderCenterANext);    
    var objSlideshowHeaderCenterImgNext = document.createElement("img");
    objSlideshowHeaderCenterImgNext.src = "/images/next.gif";
    objSlideshowHeaderCenterImgNext.setAttribute('id', 'slh_center_next_img');        
		objSlideshowHeaderCenterImgNext.setAttribute('class','slheaderimg');    
    objSlideshowHeaderCenterImgNext.setAttribute('border', '0');
    objSlideshowHeaderCenterANext.appendChild(objSlideshowHeaderCenterImgNext);

   	var objSlideShow = document.createElement("div");
		objSlideShow.setAttribute('id','slideshow');
    objSlideShow.setAttribute('class', 'jdSlideshow');    
		objLightbox.appendChild(objSlideShow);
		
		overlayEffect = new fx.Opacity(objOverlay, {duration: 300});	
		overlayEffect.hide();

	},
  
  finalize: function() {
  
    if (this.slideshow != null) {
      this.slideshow.stopSlideShow();
      this.slideshow.cleanup();
      this.slideshow = null;
    }
  
		if (!document.getElementsByTagName) { return; }
		var anchors = document.getElementsByTagName('a');

		// 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 = null;
			}
		}  

    var objBody = document.getElementsByTagName("body").item(0);    
    
    var objLightbox = $('lightbox');
    
   	var objSlideShow = $('slideshow');
		objLightbox.removeChild(objSlideShow); 

    objBody.removeChild(objLightbox);    
    
    var objSlideshowHeaderCenter = $('slh_center');
    var objSlideshowHeaderCenterAPrev = $('slh_center_prev_a');
    var objSlideshowHeaderCenterANext = $('slh_center_next_a');    
    var objSlideshowHeaderCenterImgPrev = $('slh_center_prev_img');
    var objSlideshowHeaderCenterImgNext = $('slh_center_next_img');    
    objSlideshowHeaderCenterAPrev.onclick = null;
    objSlideshowHeaderCenterAPrev.removeChild(objSlideshowHeaderCenterImgPrev);
    objSlideshowHeaderCenterANext.onclick = null;
    objSlideshowHeaderCenterANext.removeChild(objSlideshowHeaderCenterImgNext);
    objSlideshowHeaderCenter.removeChild(objSlideshowHeaderCenterAPrev);
    objSlideshowHeaderCenter.removeChild(objSlideshowHeaderCenterANext);   

    var objSlideshowHeaderRight = $('slh_right');
    var objSlideshowHeaderRightA = $('slh_right_a');
    var objSlideshowHeaderRightImg = $('slh_right_img');
    objSlideshowHeaderRightA.onclick = null;
    objSlideshowHeaderRightA.removeChild(objSlideshowHeaderRightImg);
    objSlideshowHeaderRight.removeChild(objSlideshowHeaderRightA);
    
 		var objSlideshowHeaderLeft = $('slh_left');
    objSlideshowHeaderLeft.removeChild(objSlideshowHeaderLeft.firstChild);
  
    var objSlideshowHeader = $('slideshowheader');
    objSlideshowHeader.removeChild(objSlideshowHeaderLeft);
    objSlideshowHeader.removeChild(objSlideshowHeaderCenter);
    objSlideshowHeader.removeChild(objSlideshowHeaderRight);    
		objBody.removeChild(objSlideshowHeader);
    
    var objOverlay = $('overlay');
    objOverlay.onclick = null;
    objBody.removeChild(objOverlay);

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

		hideSelectBoxes();

		// stretch overlay to fill page and fade in
		var arrayPageSize = getPageSize();
		Element.setHeight('overlay', arrayPageSize[1]);
		overlayEffect.custom(0, 0.7);
		
		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'), '', '', ''));			
		} 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'), '', '', ''));
				}
			}
			imageArray.removeDuplicates();
			while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}
		}
    
    orderedArray = [];
    for (i=imageNum; i<imageArray.length; i++) 
      orderedArray.push(imageArray[i]);
    
    for (i=0; i<imageNum; i++) 
      orderedArray.push(imageArray[i]);
    
    this.slideshow = new timedSlideShow($('slideshow'), orderedArray);
    this.enableKeyboardNav();  
    
    // calculate top offset for the lightbox and display 
		var arrayPageSize = getPageSize();
		var arrayPageScroll = getPageScroll();
		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 8);

		Element.setTop('lightbox', lightboxTop - 10);
    Element.show('lightbox');
    
    Element.setTop('slideshowheader', lightboxTop - 60);
    Element.show('slideshowheader');
    
	},

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

	//
	//	disableKeyboardNav()
	//
	disableKeyboardNav: function() {
		document.onkeydown = '';
	},
  
  nextImage: function() {
    myLightbox.disableKeyboardNav();
    myLightbox.slideshow.nextSlideShow(true);
    myLightbox.enableKeyboardNav();
  },
  
  prevImage: function() {
    myLightbox.disableKeyboardNav();
    myLightbox.slideshow.prevSlideShow(true);
    myLightbox.enableKeyboardNav(); 
  },

	//
	//	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') || (key == 'v')) {	// display previous image
      myLightbox.prevImage();
		} else if ((key == 'n') || (key == 'w')) {	// display next image
      myLightbox.nextImage();
    }
	},

	//
	//	end()
	//
	end: function() {
    Element.hide('slideshowheader');
		Element.hide('lightbox');
		overlayEffect.custom(0.7, 0);
		showSelectBoxes();
    this.disableKeyboardNav();
    this.slideshow.stopSlideShow();
    this.slideshow.cleanup();
    this.slideshow = null;
	}
}

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

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

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

function hideSelectBoxes(){
	selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].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 initLightbox() { 
  if (myLightbox == null)
    myLightbox = new Lightbox(); 
}

function finalizeLightbox() {
  if (myLightbox != null) 
    myLightbox.finalize();
  myLightbox = null;    
}