/*
Lightbox v2.03.3
5/21/06 by Lokesh Dhakar - http://www.huddletogether.com
Adapted for Savision by  Ylab, www.ylab.nl
*/
//Configuration
var fileLoadingImage = "graphics/loading.gif";
var overlayOpacity = 0.25;	//controls transparency of shadow overlay
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
var imgExtensions = /png|gif|jpg|jpeg/i //script works on these extensions
var flvExtensions = /flv/i              //these extensions require video player
var swfExtensions = /swf/i             //these extensions require flash player

//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";
	},
	setLeft: function(element,l) {
	   	element = $(element);
    	element.style.left = l +"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;
	}
});

//Lightbox Class Declaration
var Lightbox = Class.create();

Lightbox.prototype = {
	//Constructor runs on completion of the DOM loading. Calls updateImageList and then
	//the function inserts html at the bottom of the page which is used to display the shadow
	//overlay and the image container.
	initialize: function() {

		this.updateImageList();

		//Code inserts html at the bottom of the page
		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' || clickObj == 'lightboxImage' || clickObj == 'hoverNav') {
				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 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');
		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);

	},

	//Loops through anchor tags looking for 'lightbox' references and applies onclick
	//events to appropriate links. You can rerun after dynamically adding images w/ajax.
	updateImageList: 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'));
			//var testRel = relAttribute.toLowerCase().match('lightbox');
			var refAttribute = String(anchor.href);

			//use the string.match() method to catch 'lightbox' references in the rel attribute
			if (anchor.getAttribute('href') && refAttribute.match(imgExtensions)){
				anchor.className = !anchor.className ? 'thumb' : anchor.className + ' thumb';
				anchor.onclick = function () {myLightbox.start(this); return false;}
			}
			else if (anchor.getAttribute('href') && refAttribute.match(flvExtensions)){
				anchor.className = !anchor.className ? 'thumb' : anchor.className + ' thumb';
				anchor.onclick = function () {playFlv(this.href, this.title); return false;}
			}
			else if (anchor.getAttribute('href') && refAttribute.match(swfExtensions)){
				anchor.className = !anchor.className ? 'thumb' : anchor.className + ' thumb';
				anchor.onclick = function () {playSwf(this.href, this.title); return false;}
			}
		}
	},

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

		hideSelectBoxes();
		hideFlash();

		//stretch overlay to fill page and fade in
		var arrayPageSize = getPageSize();
		Element.setWidth('overlay', arrayPageSize[0]);
		Element.setHeight('overlay', arrayPageSize[1]);

		new Effect.Appear('overlay', { duration: overlayDuration, from: 0.0, to: overlayOpacity });

		imageArray = [];
		imageNum = 0;

		if (!document.getElementsByTagName){ return; }
		var anchors = document.getElementsByTagName( imageLink.tagName);

		imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title')));

		//calculate top and left offset for the lightbox
		var arrayPageScroll = getPageScroll();
		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
		var lightboxLeft = arrayPageScroll[0];
		Element.setTop('lightbox', lightboxTop);
		Element.setLeft('lightbox', lightboxLeft);

		Element.show('lightbox');
		this.changeImage(imageNum);
	},

	//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('imageDataContainer');
		Element.hide('numberDisplay');

		var mediaSrc = imageArray[activeImage][0];
		if(mediaSrc.match(flvExtensions)){
			myLightbox.resizeImageContainer(400, 300);
		}
		else{
			imgPreloader = new Image();

			//once image is preloaded, resize image container
			imgPreloader.onload=function(){
				Element.setSrc('lightboxImage', mediaSrc);
				myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
				//clear onLoad, IE behaves irratically with animated gifs otherwise
				imgPreloader.onload=null;
			};
			imgPreloader.src = mediaSrc;
		}
	},

	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.setWidth( 'imageDataContainer', widthNew);

		this.showImage();
	},

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

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

		//if caption is not null
		if(imageArray[activeImage][1]){
			Element.show('caption');
			Element.setInnerHTML( 'caption', imageArray[activeImage][1]);
		}

		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();
				}
			}
		);
	},

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

		Element.show('hoverNav');

		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();
		}

	},

	//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.com
function getPageScroll(){

	var xScroll, yScroll;

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

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

//getPageSize()
//Returns array with page width, height and window width, height
function getPageSize(){

	var xScroll, yScroll;

	if (window.innerHeight && window.scrollMaxY) {
		xScroll = window.innerWidth + window.scrollMaxX;
		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
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth;
		} else {
			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
	pageHeight = Math.max(windowHeight,yScroll);

	//for small pages with total width less then width of the viewport
	pageWidth = Math.max(windowWidth,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("embed");
	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("embed");
	for (i = 0; i < flashEmbeds.length; i++) {
		flashEmbeds[i].style.visibility = "hidden";
	}

}


//pause(numberMillis)
function pause(ms){
	var date = new Date();
	curDate = null;
	do{var curDate = new Date();}
	while( curDate - date < ms);
}

function getFlashObj(movie){
   if (window.document[movie]) {
      return window.document[movie];
   }
   if (navigator.appName.indexOf("Microsoft Internet")==-1) {
      if (document.embeds && document.embeds[movie]) {
         return document.embeds[movie];
      }
   } else {
      return document.getElementById(movie);
   }
}

function getDimensions(movie) {
   var movieObj = getFlashObj(movie);
   var width  = movieObj.TGetProperty("/", 8);
   var height = movieObj.TGetProperty("/", 9);
   return {width:width, height:height};
}

var divPlayer;
function playFlv(sSrc, sCaption){
	var obj = new SWFObject('/js/flvplayer.swf', 'objFlashPlayer', '800', '600', '7');
	obj.addParam('allowfullscreen','true');
	obj.addVariable('file', sSrc);
	obj.addVariable('autostart', 1);
	leftpos = '10px';
	createPlayer(obj, sCaption, leftpos, 800, 600);
}

function playSwf(sSrc, sCaption){
	//var obj = new SWFObject(sSrc, 'objFlashPlayer', '800', '600', '7');
	var obj = new SWFObject(sSrc, 'objFlashPlayer', '1024', '798', '7');
	createPlayer(obj, sCaption, 1024, 798);
}

function test(){
	var objId = 'objFlashPlayer';
	if(!getFlashObj(objId)){
		window.setTimeout(test, 100);
	}
	var dim=getDimensions(objId);
	alert(dim.height);
}

function createPlayer(obj, sCaption, w, h){
  if(!divPlayer){
  	createPlayerBox();
  }
  divPlayer.style.left = (10 - ((w-800)/2)) + 'px';
  divPlayer.style.width = (w+20) + 'px';
  divPlayer.style.height = (h+37) + 'px';
  divCaption.innerHTML = sCaption || '&nbsp;';
	obj.write('divSWFObject');
	divPlayer.style.display='block';
}

function createPlayerBox(){
	var objBody = $('canvas');
  divPlayer = document.createElement('div');
  divPlayer.id = 'divPlayer';
  objBody.appendChild(divPlayer);

  divCaption = document.createElement('div');
  divCaption.id = 'divCaption';
  divCaption.onclick = function(){removePlayer();};
  divPlayer.appendChild(divCaption);

  divSWFObject = document.createElement('div');
  divSWFObject.id = 'divSWFObject';
  divSWFObject.onclick = function(){removePlayer();};
  divPlayer.appendChild(divSWFObject);
}

function removePlayer(){
	var obj = $('divSWFObject');
	var objFlashPlayer = $('objFlashPlayer');
	if(obj && objFlashPlayer){
		obj.removeChild(objFlashPlayer);
	}
	divPlayer.style.display='none';
}

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