/*
	Lightbox JS: Fullsize Image Overlays 
	by Lokesh Dhakar - http://www.huddletogether.com

	For more information on this script, visit:
	http://huddletogether.com/projects/lightbox/

	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
	(basically, do anything you want, just leave my name and link)
	
	Table of Contents
	-----------------
	Configuration
	
	Functions
	- getPageScroll()
	- getPageSize()
	- pause()
	- getKey()
	- listenKey()
	- showLightbox()
	- hideLightbox()
	- initLightbox()
	- addLoadEvent()
	
	Function Calls
	- addLoadEvent(initLightbox)

*/



//
// Configuration
//

// If you would like to use a custom loading image or close button reference them in the next two lines.
var loadingImage = 'montgenevre_thibaud/img/loading.gif';		
var closeButton = 'montgenevre_thibaud/img/close.gif';
var leftButton = 'montgenevre_thibaud/img/fleche-gauche.gif';
var rightButton = 'montgenevre_thibaud/img/fleche-droite.gif';

var my_timer = 0;
var position = 0;
var moove_left = false;
var moove_right = false; 
var largeur_pano;


//
// 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;
}

//
// 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;
	}
}

//
// 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'){ hideLightbox(); }
}


//
// listenKey()
//
function listenKey () {	document.onkeypress = getKey; }
	

//
// showLightbox()
// Preloads images. Pleaces new image in lightbox then centers and displays.
//
function showLightbox(objLink)
{
	// prep objects
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	var objCaptionTitle = document.getElementById('lightboxCaptionTitle');
	var objCaptionAlt= document.getElementById('lightboxCaptionAlt');
	var objImage = document.getElementById('lightboxImage');
	var objLoadingImage = document.getElementById('loadingImage');
	var objLightboxDetails = document.getElementById('lightboxDetails');
	var objCloseButton = document.getElementById('closeButton');
	var objLinkImage =  document.getElementById('link');
	var objDivImage = document.getElementById('container_image');
	//var objLinkRight = document.getElementById('linkRight');
	//var objLinkLeft = document.getElementById('linkLeft');
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	
	// center loadingImage if it exists
	if (objLoadingImage) {
		objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
		objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
		objLoadingImage.style.display = 'block';
	}

	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';

	// preload image
	imgPreload = new Image();

	imgPreload.onload=function(){
		//On rend la lightbox visible
		objLightbox.style.display = 'block';
		
		//On récupère le lien pour notre image
		objImage.src = objLink.href;
		
		/////////////  Titre   &&   Description
		var var_name = objLink.getAttribute('id');
		var titre = "";
		var	desc = "";
		
		if (var_name != null) {
			if (var_name.substr(0, 4) == "Zoom") {
				var_name = objLink.getAttribute('id').replace("Zoom", "");
				titre = window['titre'+var_name];
				desc = window['desc'+var_name];
			}
		}
		
		if(titre != ''){
			objCaptionTitle.style.display = 'block';
			objCaptionTitle.innerHTML = titre;
		} else {
			objCaptionTitle.style.display = 'none';
		}
		
		if(desc != ''){
			objCaptionAlt.style.display = 'block';
			objCaptionAlt.innerHTML = desc;	
		} else {
			objCaptionAlt.style.display = 'none';
		}
		/////////////
		
		
		//////////// Taille image, lightbox ect..
		var width_image = imgPreload.width;
		var height_image =  imgPreload.height;
		var est_un_panoramique = false;
		var coeff = 1;
		
		objLightbox.style.height = '';
		objLightbox.style.width = '';
		objLinkImage.style.position = '';
		objLinkImage.style.width = '';
		objLinkImage.style.height = '';
		objDivImage.style.position = '';
		objDivImage.style.width = '';
		objDivImage.style.height = '';
		objDivImage.style.overflow = '';
		objDivImage.style.overflowX = '';
		objDivImage.style.overflowY = '';
		objImage.style.width = '';
		objImage.style.height = '';
		objCloseButton.style.top = '';
		objCloseButton.style.right = '';

		if (width_image > 1500 && height_image < 550) { //Pour les panoramiques, on va permettre de déplacer l'image sur la largeur
			//On passe le coontainer de l'image en position absolute
			//objLinkImage.style.position = 'absolute';
			//objDivImage.style.position = 'absolute';
			//On modifie l'overflow du containerImage
			if(navigator.appName == "Microsoft Internet Explorer"){
				objDivImage.style.overflow = 'hidden';
				objDivImage.style.overflowX = 'auto';
				objDivImage.style.overflowY = 'hidden';
			}
			else if (navigator.appName == "Netscape"){
				objDivImage.style.overflow = ' -moz-scrollbars-horizontal';
			}
			else {
				objDivImage.style.overflow = 'auto';
			}
			//On décale la position du bouton close
			objCloseButton.style.top = 5 + 'px';
			objCloseButton.style.right = 5 + 'px';
			
			//On fait apparaitre nos liens left and right
			//objLinkRight.style.display = 'block';
			//objLinkLeft.style.display = 'block';
			//On fait apparaitre CaptaionTitle qui contient les fleches
			//objCaptionTitle.style.display = 'block';
			//objCaptionTitle.style.height = 20 + 'px';
			
			//On va calculer un coeff
			coeff = width_image / arrayPageSize[0];
			coeff = coeff + 0.3;
			
			//On save la largeur du panoramique
			//largeur_pano = width_image;
			//On spécifie que l'image est un panoramique
			est_un_panoramique = true;
		}
		else if (width_image > arrayPageSize[0] || (height_image + objCaptionTitle.offsetHeight + objCaptionAlt.offsetHeight) > arrayPageSize[1]) { //Image plus grande que la fenetre
			//On va calculer un coeff pour nous permettre de redimensionner notre image en fonction de la taille de la page
			if (arrayPageSize[0] < arrayPageSize[1]) {
				coeff = width_image / arrayPageSize[0];
				coeff = coeff + 0.2;
			}
			else {
				coeff = (height_image + objCaptionTitle.offsetHeight + objCaptionAlt.offsetHeight) / arrayPageSize[1];
				coeff = coeff + 0.3;
			}
		}
		 
		width_image = width_image / coeff;
		height_image = height_image / coeff;
		
		if (est_un_panoramique == true) {
			//On redimensionne le conteneur de l'image
			height_image = imgPreload.height;
			
			objLightbox.style.height = height_image + 'px';
			
			objLinkImage.style.width = width_image + 'px';
			objLinkImage.style.height = 0;
			
			objDivImage.style.width = width_image + 'px';
			objDivImage.style.height = height_image + 'px';
		}
		else {
			//On redimensionne l'image
			objImage.style.width = width_image + 'px';
			objImage.style.height = height_image + 'px';
		}
		///////////////////
		
		// center lightbox and make sure that the top and left values are not negative
		// and the image placed outside the viewport
		var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - (35/coeff) - (height_image + objCaptionTitle.offsetHeight + objCaptionAlt.offsetHeight)) / 2);
		var lightboxLeft = ((arrayPageSize[0] - (20/coeff) - width_image) / 2);
		
		objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
		objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
 
		objLightbox.style.width = width_image + 'px';
		

		
		// A small pause between the image loading and displaying is required with IE,
		// this prevents the previous image displaying for a short burst causing flicker.
		if (navigator.appVersion.indexOf("MSIE")!=-1){
			pause(250);
		} 

		if (objLoadingImage) {	objLoadingImage.style.display = 'none'; }

		// Hide select boxes as they will 'peek' through the image in IE
		selects = document.getElementsByTagName("select");
        for (i = 0; i != selects.length; i++) {
                selects[i].style.visibility = "hidden";
        }

		
		// After image is loaded, update the overlay height as the new image might have
		// increased the overall page height.
		arrayPageSize = getPageSize();
		objOverlay.style.height = (arrayPageSize[1] + 'px');
		
		// Check for 'x' keypress
		listenKey();

		return false;
	}
	
	imgPreload.src = objLink.href;
	
}





//
// hideLightbox()
//
function hideLightbox()
{
	// get objects
	objOverlay = document.getElementById('overlay');
	objLightbox = document.getElementById('lightbox');

	// hide lightbox and overlay
	objOverlay.style.display = 'none';
	objLightbox.style.display = 'none';
	
	// make select boxes visible
	selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}

	// disable keypress listener
	document.onkeypress = '';
}

function moove()
{
	if (moove_right == true) {
		mooveRight();
	}
	else if (moove_left == true) {
		mooveLeft();
	}
}

function startRight()
{
	if (moove_right == false){
		my_timer = setInterval("moove()",1);
	}
	moove_right = true;
}

function stopRight()
{
	clearInterval(my_timer);
	moove_right = false;
}

function startLeft()
{
	if (moove_left == false){
		my_timer = setInterval("moove()",1);
	}
	moove_left = true;
}

function stopLeft()
{
	clearInterval(my_timer);
	moove_left = false;
}

function mooveRight()
{
	var objLinkImage = document.getElementById("link");
	var objDivImage = document.getElementById("container_image");
	var style = objLinkImage.style.width;
	var width_container = style.substr(0, style.length - 2);
	
	if ( position > -(largeur_pano - width_container) ) {
		position --;
		objDivImage.style.left = position + 'px';
	}
}

function mooveLeft()
{
	var objDivImage = document.getElementById("container_image");
	if (position < 0){
		position ++;
		objDivImage.style.left = position + 'px';
	}
}




//
// initLightbox()
// Function runs on window load, going through link tags looking for rel="lightbox".
// These links receive onclick events that enable the lightbox display for their targets.
// The function also inserts html markup at the top of the page which will be used as a
// container for the overlay pattern and the inline image.
//
function initLightbox()
{
	
	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];

		if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")){
			anchor.onclick = function () {showLightbox(this); return false;}
		}
	}

	// the rest of this code inserts html at the top of the page that looks like this:
	//
	// <div id="overlay">
	//		<a href="#" onclick="hideLightbox(); return false;"><img id="loadingImage" /></a>
	//	</div>
	// <div id="lightbox">
	//		<a href="#" onclick="hideLightbox(); return false;" title="Click anywhere to close image">
	//			<img id="closeButton" />		
	//			<img id="lightboxImage" />
	//		</a>
	//		<div id="lightboxDetails">
	//			<div id="lightboxCaption"></div>
	//			<div id="keyboardMsg"></div>
	//		</div>
	// </div>
	
	var ie = false;
	if(navigator.appName == "Microsoft Internet Explorer"){
		ie = true;
	}
	
	
	var objBody = document.getElementsByTagName("body").item(0);
	
	// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
	var objOverlay = document.createElement("div");
	objOverlay.setAttribute('id','overlay');
	objOverlay.onclick = function () {hideLightbox(); return false;}
	objOverlay.style.display = 'none';
	objOverlay.style.position = 'absolute';
	objOverlay.style.top = '0';
	objOverlay.style.left = '0';
	objOverlay.style.zIndex = '600';
 	objOverlay.style.width = '100%';
 	objOverlay.style.backgroundColor = 'black';
 	objOverlay.style.opacity = '0.5';
 	objOverlay.style.filter = 'alpha(opacity=50)';
	
	objBody.insertBefore(objOverlay, objBody.firstChild);
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	// preload and create loader image
	var imgPreloader = new Image();
	
	// if loader image found, create link to hide lightbox and create loadingimage
	imgPreloader.onload=function(){

		var objLoadingImageLink = document.createElement("a");
		objLoadingImageLink.setAttribute('href','#');
		objLoadingImageLink.onclick = function () {hideLightbox(); return false;}
		objOverlay.appendChild(objLoadingImageLink);
		
		var objLoadingImage = document.createElement("img");
		objLoadingImage.src = loadingImage;
		objLoadingImage.setAttribute('id','loadingImage');
		objLoadingImage.style.position = 'absolute';
		objLoadingImage.style.zIndex = '620';
		objLoadingImageLink.appendChild(objLoadingImage);

		imgPreloader.onload=function(){};	//	clear onLoad, as IE will flip out w/animated gifs

		return false;
	}

	imgPreloader.src = loadingImage;

	// create lightbox div, same note about styles as above
	var objLightbox = document.createElement("div");
	objLightbox.setAttribute('id','lightbox');
	objLightbox.setAttribute('class','lightbox-fond');
	objLightbox.style.display = 'none';
	objLightbox.style.position = 'absolute';
	objLightbox.style.zIndex = '610';	
	objBody.insertBefore(objLightbox, objOverlay.nextSibling);
	
	//Create Caption title
	var objCaptionTitle = document.createElement("div");
	objCaptionTitle.setAttribute('id','lightboxCaptionTitle');
	objCaptionTitle.style.display = 'none';
	objCaptionTitle.style.marginBottom = 5 + "px";
	objCaptionTitle.style.textAlign = "center";
	objCaptionTitle.setAttribute('class','lightbox-titre');
	objLightbox.appendChild(objCaptionTitle);
	
	// create link
	var objLink = document.createElement("a");
	objLink.setAttribute('id','link');
	objLink.setAttribute('href','#');
	objLink.setAttribute('title','Cliquez pour fermer');
	objLink.style.display = 'block';
	objLink.onclick = function () {hideLightbox(); return false;}
	objLightbox.appendChild(objLink);
	
	//Create container image
	var objDivImage = document.createElement("div");
	objDivImage.setAttribute('id','container_image');
	//objLink.appendChild(objDivImage);
	objLightbox.appendChild(objDivImage);
	
	// preload and create close button image
	var imgPreloadCloseButton = new Image();

	// if close button image found, 
	imgPreloadCloseButton.onload=function(){

		var objCloseButton = document.createElement("img");
		objCloseButton.src = closeButton;
		objCloseButton.setAttribute('id','closeButton');
		objCloseButton.style.position = 'absolute';
		objCloseButton.style.zIndex = '650';
		objLink.appendChild(objCloseButton);

		return false;
	}

	imgPreloadCloseButton.src = closeButton;
	
	
	//////////////////////////////////
	/////////////////////////////////
	
	
	//create link right
	/*
	var objLinkRight = document.createElement("a");
	objLinkRight.setAttribute('id','linkRight');
	objLinkRight.setAttribute('href','#');
	if (ie == true){
		objLinkRight.style.styleFloat = 'right';
	}
	else {
		objLinkRight.style.cssFloat = 'right';
	}
	objLinkRight.style.width = 15 + 'px';
	objLinkRight.onmouseover    = function () {startRight(); return false;}
	objLinkRight.onmouseout    = function () {stopRight(); return false;}
	objCaptionTitle.appendChild(objLinkRight);
	
	//create link left
	var objLinkLeft = document.createElement("a");
	objLinkLeft.setAttribute('id','linkLeft');
	objLinkLeft.setAttribute('href','#');
	if (ie == true){
		objLinkLeft.style.styleFloat = 'left';
	}
	else {
		objLinkLeft.style.cssFloat  = 'left';
	}
	objLinkLeft.style.width = 15 + 'px';
	objLinkLeft.onmouseover  = function () {startLeft(); return false;}
	objLinkLeft.onmouseout   = function () {stopLeft(); return false;}
	objCaptionTitle.appendChild(objLinkLeft);

	
	var imgPreloadRightButton = new Image();

	imgPreloadRightButton.onload = function(){

		var objRightButton = document.createElement("img");
		objRightButton.src = rightButton;
		objRightButton.setAttribute('id','rightButton');
		objRightButton.style.zIndex = '650';
		objLinkRight.appendChild(objRightButton);

		return false;
	}

	imgPreloadRightButton.src = rightButton;
	
	
	var imgPreloadLeftButton = new Image();

	imgPreloadLeftButton.onload=function(){

		var objLeftButton = document.createElement("img");
		objLeftButton.src = leftButton;
		objLeftButton.setAttribute('id','leftButton');
		objLeftButton.style.zIndex = '650';
		objLinkLeft.appendChild(objLeftButton);

		return false;
	}

	imgPreloadLeftButton.src = leftButton;
	*/
	
	//////////////////////////////////
	/////////////////////////////////

	// create image
	var objImage = document.createElement("img");
	objImage.setAttribute('id','lightboxImage');
	objDivImage.appendChild(objImage);
	
	// create details div, a container for the caption and keyboard message
	var objLightboxDetails = document.createElement("div");
	objLightboxDetails.setAttribute('id','lightboxDetails');
	objLightbox.appendChild(objLightboxDetails);
	
	// create caption alt
	var objCaptionAlt = document.createElement("div");
	objCaptionAlt.setAttribute('id','lightboxCaptionAlt');
	objCaptionAlt.setAttribute('class','lightbox-desc');
	objCaptionAlt.style.display = 'none';
	objLightboxDetails.appendChild(objCaptionAlt);

}




//
// addLoadEvent()
// Adds event to window.onload without overwriting currently assigned onload functions.
// Function found at Simon Willison's weblog - http://simon.incutio.com/
//
function addLoadEvent(func)
{	
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
    	window.onload = func;
	} else {
		window.onload = function(){
		oldonload();
		func();
		}
	}

}



addLoadEvent(initLightbox);	// run initLightbox onLoad