// -----------------------------------------------------------------------------------
//
//	Litebox v1.0
//	A combined effort between detrate and gannon
//	07/03/06
//
//	Source edited from Lightbox v2.02
//	by Lokesh Dhakar - http://www.huddletogether.com
//
//	For more information on this script, visit:
//	http://doknowevil.net/litebox
//
//	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.
//
// -----------------------------------------------------------------------------------

//
//	Configuration
//
var fileLoadingImage = "images/Lightbox/loading.gif";		
var fileBottomNavCloseImage = "images/Lightbox/closelabel.gif";
var resizeSpeed = 6;	// 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;

if(resizeSpeed > 10){ resizeSpeed = 10;}
if(resizeSpeed < 1){ resizeSpeed = 1;}
resizeDuration = (11 - resizeSpeed) * 100;

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

//
//	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";
	},
	setSrc: function(element, src) {
		element = $(element);
		element.src = src.substring(src.indexOf("#") + 1);
	},
	setInnerHTML: function(element, content) {
		element = $(element);
		element.innerHTML = content;
	}
});

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

//
//	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 objParentBody = parent.document.getElementsByTagName("body").item(0);

		if (objParentBody == null)
		{
      objParentBody = document.getElementsByTagName("body").item(0);
      var objDocument = document;
    }
    else
    {
      var objDocument = parent.document;
    }

		var objOverlay = objDocument.createElement("div");
		objOverlay.setAttribute('id', 'overlay');
		objOverlay.onclick = function() { myLightbox.end(); return false; }
		//objBody.appendChild(objOverlay);
		objParentBody.appendChild(objOverlay);

		var objLightbox = objDocument.createElement("div");
		objLightbox.setAttribute('id', 'lightbox');
		objLightbox.style.display = 'none';
		//objBody.appendChild(objLightbox);
		objParentBody.appendChild(objLightbox);

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

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

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

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

		var objPrevLink = objDocument.createElement("a");
		objPrevLink.setAttribute('id', 'prevLink');
		objPrevLink.setAttribute('href', '#');
		objHoverNav.appendChild(objPrevLink);

		var objNextLink = objDocument.createElement("a");
		objNextLink.setAttribute('id', 'nextLink');
		objNextLink.setAttribute('href', '#');
		objHoverNav.appendChild(objNextLink);

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

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

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

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

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

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

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

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

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

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

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

		overlayEffect = new fx.Opacity(objOverlay, { duration: 300 });
		overlayEffect.hide();

		imageEffect = new fx.Opacity(objLightboxImage, { duration: 350, onComplete: function() { imageDetailsEffect.custom(0, 1); } });
		imageEffect.hide();

		imageDetailsEffect = new fx.Opacity('imageDataContainer', { duration: 400, onComplete: function() { navEffect.custom(0, 1); } });
		imageDetailsEffect.hide();

		navEffect = new fx.Opacity('hoverNav', { duration: 100 });
		navEffect.hide();
	},

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

		hideSelectBoxes();
		hideObjects();

		// stretch overlay to fill page and fade in
		var arrayPageSize = getPageSize();
		Element.setHeight('overlay', arrayPageSize[1]);
		overlayEffect.custom(0, 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'), imageLink.getAttribute('title')));
		} 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'), anchor.getAttribute('title')));
				}
			}
			imageArray.removeDuplicates();
			while (imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++; }
		}

		// calculate top offset for the lightbox and display 
		var arrayPageSize = getPageSize();
		var arrayPageScroll = getPageScroll();
		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 15);

		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
		Element.show('loading');
		imageDetailsEffect.hide();
		imageEffect.hide();
		navEffect.hide();
		Element.hide('prevLink');
		Element.hide('nextLink');
		Element.hide('numberDisplay');

    if (parent.document.getElementsByTagName("body").item(0) == null)
      var objDocument = document;
    else
      var objDocument = parent.document;

		imgPreloader = new Image();
		// once image is preloaded, resize image container
		imgPreloader.onload = function() {
			Element.setSrc('lightboxImage', imageArray[activeImage][0]);
			if (imgPreloader.width > 700) objDocument.getElementById('lightboxImage').width = 700;
			myLightbox.resizeImageContainer(objDocument.getElementById('lightboxImage').width, objDocument.getElementById('lightboxImage').height);
		}
		//alert(imageArray[activeImage][0].substring(imageArray[activeImage][0].indexOf("#") +1));
		imgPreloader.src = imageArray[activeImage][0].substring(imageArray[activeImage][0].indexOf("#") + 1);
	},

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

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

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

		// Resize the outerImageContainer very sexy like
		reHeight = new fx.Height('outerImageContainer', { duration: resizeDuration });
		reHeight.custom(Element.getHeight('outerImageContainer'), imgHeight + (borderSize * 2));
		reWidth = new fx.Width('outerImageContainer', { duration: resizeDuration, onComplete: function() { imageEffect.custom(0, 1); } });
		reWidth.custom(Element.getWidth('outerImageContainer'), imgWidth + (borderSize * 2));

		// 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', imgWidth + (borderSize * 2));
		Element.setWidth('hoverNav', imgWidth + (borderSize * 2));

		this.showImage();
	},

	//
	//	showImage()
	//	Display image and begin preloading neighbors.
	//
	showImage: function() {
		Element.hide('loading');
		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', "Mynd " + eval(activeImage + 1) + " av " + imageArray.length);
		}

		myLightbox.updateNav();
	},
	//
	//	updateNav()
	//	Display appropriate previous and next hover navigation.
	//
	updateNav: function() {

    if (parent.document.getElementsByTagName("body").item(0) == null)
      var objDocument = document;
    else
      var objDocument = parent.document;

		// if not first image in set, display prev image button
		if (activeImage != 0) {
			Element.show('prevLink');
			objDocument.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');
			objDocument.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;
		} else { // mozilla
			keycode = e.which;
		}

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

		if ((key == 'x') || (key == 'o') || (key == 'c')) {	// close lightbox
			myLightbox.end();
		} else if (key == 'f') {	// 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].substring(imageArray[activeImage][0].indexOf("#") +1);
		}
		if (activeImage > 0) {
			preloadPrevImage = new Image();
			preloadPrevImage.src = imageArray[activeImage -1][0].substring(imageArray[activeImage][0].indexOf("#") + 1);
		}

	},

	//
	//	end()
	//
	end: function() {
		this.disableKeyboardNav();
		Element.hide('lightbox');
		imageEffect.toggle();
		overlayEffect.custom(0.8, 0);
		showSelectBoxes();
		showObjects();
	}
}

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

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

    if (parent.document.getElementsByTagName("body").item(0) == null)
      var objDocument = document;
    else
      var objDocument = parent.document;

	var yScroll;

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

  if (parent.document.getElementsByTagName("body").item(0) == null)
    var objDocument = document;
  else
    var objDocument = parent.document;
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = objDocument.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = objDocument.body.scrollWidth;
		yScroll = objDocument.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = objDocument.body.offsetWidth;
		yScroll = objDocument.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 = objDocument.documentElement.clientWidth;
		windowHeight = objDocument.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 showObjects(){
	selects = document.getElementsByTagName("object");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}
}

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

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

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() { myLightbox = new Lightbox(); }