// -----------------------------------------------------------------------------------
//
//	HTML Lightbox v1.0
//
//
// -----------------------------------------------------------------------------------
/*

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

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

	Lightbox Class Declaration
	- initialize()
	- updateImageList()
	- start()
	- changeImage()
	- resizeHtmlContainer()
	- showIFrame()
	- updateDetails()
	- updateNav()
	- enableKeyboardNav()
	- disableKeyboardNav()
	- keyboardAction()
	- preloadNeighborImages()
	- end()
	
	Miscellaneous Functions
	- getPageScroll()
	- getPageSize()
	- getKey()
	- listenKey()
	- showSelectBoxes()
	- hideSelectBoxes()
	- showFlash()
	- hideFlash()
	- pause()
	- initMyHtmlLightbox()
	
	Function Calls
	- addLoadEvent(initMyHtmlLightbox)
	
*/
// -----------------------------------------------------------------------------------

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

var overlayOpacity = 0.8;	// controls transparency of shadow myhtmloverlay

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
//

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;
	},
	getInnerHTML: function(element) {
		element = $(element);
		return element.innerHTML;
	}
});

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

//
//	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()
//	- resizeHtmlContainer()
//	- showIFrame()
//	- updateDetails()
//	- updateNav()
//	- enableKeyboardNav()
//	- disableKeyboardNav()
//	- keyboardNavAction()
//	- preloadNeighborImages()
//	- end()
//
//	Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
//

var MyHtmlLightbox = Class.create();

MyHtmlLightbox.prototype = {
	
	// initialize()
	// 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 
	// myhtmloverlay and the image container.
	//
	initialize: function() {
		
		// Code inserts html at the bottom of the page that looks similar to this:
		//
		//	<div id="myhtmloverlay"></div>
		//	<div id="myHtmlLightbox">
		//		<div id="outerContainer">
		//			<div id="htmlContainer">
		//				<iframe id="htmlLightboxIFrame" src="#" frameborder="0"></iframe>
		//				<div id="myloading">
		//					<a href="#" id="loadingLink">
		//						<img src="/images/lightbox/loading.gif">
		//					</a>
		//				</div>
		//			</div>
		//		</div>
		//		<div id="DataContainer">
		//			<div id="Data">
		//				<div id="bottomNav">
		//					<a href="#" id="bottomNavClose">
		//						<img src="/images/lightbox/close.gif">
		//					</a>
		//				</div>
		//			</div>
		//		</div>
		//	</div>


		var objBody = document.getElementsByTagName("body").item(0);
		
		var objOverlay = document.createElement("div");
		objOverlay.setAttribute('id','myhtmloverlay');
		objOverlay.style.display = 'none';
		objOverlay.onclick = function() { HtmlLightbox.end(); }
		objBody.appendChild(objOverlay);
		
		var objMyHtmlLightbox = document.createElement("div");
		objMyHtmlLightbox.setAttribute('id','myHtmlLightbox');
		objMyHtmlLightbox.style.display = 'none';
		objMyHtmlLightbox.onclick = function(e) {	// close Lightbox is user clicks shadow myhtmloverlay
			if (!e) var e = window.event;
			var clickObj = Event.element(e).id;
			if ( clickObj == 'myHtmlLightbox') {
				HtmlLightbox.end();
			}
		};
		objBody.appendChild(objMyHtmlLightbox);
			
		var objOuterContainer = document.createElement("div");
		objOuterContainer.setAttribute('id','outerContainer');
		objMyHtmlLightbox.appendChild(objOuterContainer);

		// 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('outerContainer', 250);
			Element.setHeight('outerContainer', 250);			
		} else {
			Element.setWidth('outerContainer', 1);
			Element.setHeight('outerContainer', 1);			
		}

		var objHtmlContainer = document.createElement("div");
		objHtmlContainer.setAttribute('id','htmlContainer');
		objOuterContainer.appendChild(objHtmlContainer);
		
		var frameborder = document.createAttribute("frameborder");
		frameborder.nodeValue = "0";
		
		var objIFrame = document.createElement("iframe");
		objIFrame.setAttribute('src','#');
		objIFrame.setAttributeNode(frameborder);
		objIFrame.setAttribute('frameborder','0');
		objIFrame.setAttribute('id','htmlLightboxIFrame');
		objHtmlContainer.appendChild(objIFrame);
	
		var objLoading = document.createElement("div");
		objLoading.setAttribute('id','myloading');
		objHtmlContainer.appendChild(objLoading);
	
		var objLoadingLink = document.createElement("a");
		objLoadingLink.setAttribute('id','loadingLink');
		objLoadingLink.setAttribute('href','#');
		objLoadingLink.onclick = function() { HtmlLightbox.end(); return false; }
		objLoading.appendChild(objLoadingLink);
	
		var objLoadingImage = document.createElement("img");
		objLoadingImage.setAttribute('src', fileLoadingImage);
		objLoadingLink.appendChild(objLoadingImage);

		var objDataContainer = document.createElement("div");
		objDataContainer.setAttribute('id','DataContainer');
		objMyHtmlLightbox.appendChild(objDataContainer);

		var objData = document.createElement("div");
		objData.setAttribute('id','Data');
		objDataContainer.appendChild(objData);
	
		var objBottomNav = document.createElement("div");
		objBottomNav.setAttribute('id','bottomNav');
		objData.appendChild(objBottomNav);
	
		var objBottomNavCloseLink = document.createElement("a");
		objBottomNavCloseLink.setAttribute('id','bottomNavClose');
		objBottomNavCloseLink.setAttribute('href','#');
		objBottomNavCloseLink.onclick = function() { HtmlLightbox.end(); return false; }
		objBottomNav.appendChild(objBottomNavCloseLink);
	
		var objBottomNavCloseImage = document.createElement("img");
		objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
		objBottomNavCloseLink.appendChild(objBottomNavCloseImage);
	},


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

		hideSelectBoxes();
		hideFlash();
		Element.hide('DataContainer');
		
		var effektiveHeight;
		var effektiveWidth;

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

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


		// calculate top and left offset for the lightbox 
		var arrayPageScroll = getPageScroll();
		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
		var lightboxLeft = arrayPageScroll[0];
		Element.setTop('myHtmlLightbox', lightboxTop);
		Element.setLeft('myHtmlLightbox', lightboxLeft);
		
		Element.show('myHtmlLightbox');
		
		
		Element.setSrc('htmlLightboxIFrame', sHref);
		
		// this.resizeHtmlContainer(parseInt(effektiveWidth), parseInt(effektiveHeight));
		
		HtmlLightbox.enableKeyboardNav();
	},

	//
	//	resizeHtmlContainer()
	//
	resizeHtmlContainer: function(fixWidth, fixHeight) {

		var windowX, windowY;
		
		if (window.innerHeight) {	
			windowX = window.innerWidth;
			windowY = window.innerHeight;
		} else {
			windowX = document.body.offsetWidth;
			windowY = document.body.offsetHeight;
		}
		
		if (fixWidth != '' && fixWidth != undefined) {
			effektiveWidth = fixWidth;
		} else {
			effektiveWidth = (windowX / 100) * 80;
		}
		
		if (fixHeight != '' && fixHeight != undefined) {
			effektiveHeight = fixHeight;
		} else {
			effektiveHeight = (windowY / 100) * 80;
		}
		
		
		// get curren width and height
		this.widthCurrent = Element.getWidth('outerContainer');
		this.heightCurrent = Element.getHeight('outerContainer');

		// get new width and height
		var widthNew = (effektiveWidth  + (borderSize * 2));
		var heightNew = (effektiveHeight  + (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('outerContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
		if(!( wDiff == 0)){ new Effect.Scale('outerContainer', 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('DataContainer', widthNew);
		
		Element.setWidth('htmlLightboxIFrame', widthNew - (borderSize * 2))
		Element.setHeight('htmlLightboxIFrame', heightNew - (borderSize * 2))
		
		this.showIFrame();
	},
	
	//
	//	showIFrame()
	//	Display image and begin preloading neighbors.
	//
	showIFrame: function(){
		new Effect.Appear('htmlLightboxIFrame', { duration: resizeDuration, queue: 'end', afterFinish: function(){	HtmlLightbox.updateDetails(); } });
	},

	//
	//	updateDetails()
	//	Display caption, image number, and bottom nav.
	//
	updateDetails: function() {
	
		new Effect.Parallel(
			[ new Effect.SlideDown( 'DataContainer', { sync: true, duration: resizeDuration, from: 0.0, to: 1.0 }), 
			  new Effect.Appear('DataContainer', { sync: true, duration: resizeDuration }) ], 
			{ duration: resizeDuration, afterFinish: function() {
				// update myhtmloverlay size and update nav
				var arrayPageSize = getPageSize();
				Element.setHeight('myhtmloverlay', arrayPageSize[1]);
				}
			} 
		);
		Element.hide('myloading');
	},
	
	//
	//	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
			HtmlLightbox.end();
		}

	},

	//
	//	end()
	//
	end: function() {
		this.disableKeyboardNav();
		Element.hide('myHtmlLightbox');
		new Effect.Fade('myhtmloverlay', { duration: overlayDuration});
		showSelectBoxes();
		showFlash();
		Element.setSrc('htmlLightboxIFrame', '');
		Element.setOpacity('htmlLightboxIFrame', 0);
		Element.setWidth('outerContainer', 250);
		Element.setHeight('outerContainer', 250);
		Element.show('myloading');
	}
}

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

//
// 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
// Core code from - quirksmode.com
// Edit for Firefox by pHaez
//
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;
	
//	console.log(self.innerWidth);
//	console.log(document.documentElement.clientWidth);

	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
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

//	console.log("xScroll " + xScroll)
//	console.log("windowWidth " + windowWidth)

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}
//	console.log("pageWidth " + pageWidth)

	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)
// 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();	
}
*/
// ---------------------------------------------------

var JsLightboxIsLoaded;
var HtmlLightbox;

function initMyHtmlLightbox() { 
	HtmlLightbox = new MyHtmlLightbox();
	hideHtmlLightboxOverlays();
	JsLightboxIsLoaded = true;
}

function onJsLightboxIsLoaded(sFunction) {

	if ((sFunction != '') && (sFunction != null) && (JsLightboxIsLoaded != true)) {

		window.setTimeout('onJsLightboxIsLoaded("' + sFunction + '")', 200);
	
	}
	
	if (JsLightboxIsLoaded) {
		window.setTimeout(sFunction, 20);	
	}
	
}

function hideHtmlLightboxOverlays() {

	if (!document.getElementsByTagName){ return; }

	var divs = document.getElementsByTagName('div');
	
	for (var i = 0; i < divs.length; i++){
	
		var div = divs[i];
		
		var relAttribute = String(div.getAttribute('rel'));
		
		if (relAttribute == 'ImageOverlay'){
			div.style.display = 'none';
		}
	}
}

//onJsLightboxIsLoaded('hideHtmlLightboxOverlays()');


// Event.observe(window, 'load', initMyHtmlLightbox, false);