/*
Created By: Chris Campbell
Website: http://particletree.com
Date: 2/1/2006

Inspired by the lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
*/

/*-------------------------------GLOBAL VARIABLES------------------------------------*/

var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

/*-----------------------------------------------------------------------------------------------*/

//Browser detect script origionally created by Peter Paul Koch at http://www.quirksmode.org/

function getBrowserInfo() {
	if (checkIt('konqueror')) {
		browser = "Konqueror";
		OS = "Linux";
	}
	else if (checkIt('safari')) browser 	= "Safari"
	else if (checkIt('omniweb')) browser 	= "OmniWeb"
	else if (checkIt('opera')) browser 		= "Opera"
	else if (checkIt('webtv')) browser 		= "WebTV";
	else if (checkIt('icab')) browser 		= "iCab"
	else if (checkIt('msie')) browser 		= "Internet Explorer"
	else if (!checkIt('compatible')) {
		browser = "Netscape Navigator"
		version = detect.charAt(8);
	}
	else browser = "An unknown browser";

	if (!version) version = detect.charAt(place + thestring.length);

	if (!OS) {
		if (checkIt('linux')) OS 		= "Linux";
		else if (checkIt('x11')) OS 	= "Unix";
		else if (checkIt('mac')) OS 	= "Mac"
		else if (checkIt('win')) OS 	= "Windows"
		else OS 								= "an unknown operating system";
	}
}

function checkIt(string) {
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}


//
// 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;
}

/* recentrage site si besoin */
function recentre(){
	var popup = document.getElementById('lightbox');
	if (popup) {
	
		var psize = getPageSize();
		var pscroll = getPageScroll();
		
		var h = popup.clientHeight;
		var w = popup.clientWidth;
				
		var margeH = 100;
		var margeW = (psize[2] / 2) - (w / 2);
		
		popup.style.marginTop = Math.round(margeH)+"px";
		popup.style.marginLeft = Math.round(margeW)+"px";
	}
}

function recentre2(){

	var popup = document.getElementById('lightbox');
	if (popup) {
	
		var psize = getPageSize();
		var pscroll = getPageScroll();
		
		var h = popup.clientHeight;
		var w = popup.clientWidth;
		
		var margeH = 0;
		var margeW = 0;
		
		//alert(h+","+w+" | pWidth="+psize[0]+" pHeight="+psize[1]+" wWidth="+psize[2]+" wHeight="+psize[3]+" xScroll="+pscroll[0]+" yScroll="+pscroll[1]);
		
		var hAffiche = psize[3];
		
		//alert (h+" dans "+hAffiche);
		if (h >= hAffiche){
			// le popup est plus grand que la zone a affichable
			margeH = pscroll[1]; // valeur de l'ascenseur
		
		}else{
			var PopupH = h+100;
			if (pscroll[1] > 100){
				margeH = (hAffiche / 2) - (h / 2) + pscroll[1];
			}else
			if (PopupH > psize[3]){
				margeH = (hAffiche / 2) - (h / 2) + pscroll[1];
			}else{
				margeH = 100;
			}
		}
		
		
		
		margeW = (psize[2] / 2) - (w / 2);
		
		popup.style.marginTop = Math.round(margeH)+"px";
		popup.style.marginLeft = Math.round(margeW)+"px";
	}
}

/*-----------------------------------------------------------------------------------------------*/

Event.observe(window, 'load', initialize, false);
Event.observe(window, 'load', getBrowserInfo, false);
/* Event.observe(window, 'unload', Event.unloadCache, false); */

var lightbox = Class.create();

lightbox.prototype = {

	yPos : 0,
	xPos : 0,

	initialize: function(ctrl) {
		this.content = ctrl.href;
		Event.observe(ctrl, 'click', this.activate.bindAsEventListener(this), false);
		ctrl.onclick = function(){return false;};
	},
	
	// Turn everything on - mainly the IE fixes
	activate: function(){
		if (browser == 'Internet Explorer'){
			//this.getScroll();
			this.prepareIE('100%', 'hidden');
			//this.setScroll(0,0);
			//this.hideSelects('hidden');
		}
		
		this.displayLightbox("block");
	},

	// Ie requires height to 100% and overflow hidden or else you can scroll down past the lightbox
	prepareIE: function(height, overflow){
		
		bod = document.getElementsByTagName('body')[0];
		bod.style.height = ( document.body.parentNode.scrollHeight )+"px";//height;
		bod.style.overflow = overflow;
  
		htm = document.getElementsByTagName('html')[0];
		//htm.style.height = height;
		htm.style.overflow = 'auto';//overflow; // modif pour assenceur si popup plus grand que l'ecran
	},
	
	// In IE, select elements hover on top of the lightbox
	hideSelects: function(visibility){
		selects = document.getElementsByTagName('select');
		for(i = 0; i < selects.length; i++) {
			selects[i].style.visibility = visibility;
		}
	},
	
	// Taken from lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
	getScroll: function(){
		if (self.pageYOffset) {
			this.yPos = self.pageYOffset;
		} else if (document.documentElement && document.documentElement.scrollTop){
			this.yPos = document.documentElement.scrollTop; 
		} else if (document.body) {
			this.yPos = document.body.scrollTop;
		}
	},
	
	setScroll: function(x, y){
		window.scrollTo(x, y); 
	},
	
	displayLightbox: function(display){
		$('overlay').style.display = display;
		$('lightbox').style.display = display;
		//recentre();
		setTimeout(function(){recentre();}, 150);
		setTimeout(function(){recentre();}, 500);
		if(display != 'none') this.loadInfo();
	},
	
	// Begin Ajax request based off of the href of the clicked linked
	loadInfo: function() {
		var myAjax = new Ajax.Request(
        this.content,
        {method: 'post', parameters: "", onComplete: this.processInfo.bindAsEventListener(this)}
		);
		
	},
	
	// Display Ajax response
	processInfo: function(response){
		info = "<div id='lbContent'>" + response.responseText + "</div>";
		/* new Insertion.Before($('lbLoadMessage'), info)*/
		Element.insert($('lbLoadMessage'), {before: info})
		$('lightbox').className = "done";	
		this.actions();			
	},
	
	// Search through new links within the lightbox, and attach click event
	actions: function(){
		lbActions = document.getElementsByClassName('lbAction');

		for(i = 0; i < lbActions.length; i++) {
			Event.observe(lbActions[i], 'click', this[lbActions[i].rel].bindAsEventListener(this), false);
			lbActions[i].onclick = function(){return false;};
		}

		// HACK 2M : fermeture du popup si click en dehors
		Event.observe($('overlay'), 'click', this.deactivate.bindAsEventListener(this), false);
		
		
		//setTimeout(function(){recentre2();}, 100);
	},
	
	// Example of creating your own functionality once lightbox is initiated
	insert: function(e){
	   link = Event.element(e).parentNode;
	   Element.remove($('lbContent'));
	 
	   var myAjax = new Ajax.Request(
			  link.href,
			  {method: 'post', parameters: "", onComplete: this.processInfo.bindAsEventListener(this)}
	   );
	 
	},
	
	// Example of creating your own functionality once lightbox is initiated
	deactivate: function(){
		if ($('lbContent')){
			Element.remove($('lbContent'));
		}
		
		if (browser == "Internet Explorer"){
			this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}
		
		this.displayLightbox("none");
	}
}

/*-----------------------------------------------------------------------------------------------*/

// Onload, make all links that need to trigger a lightbox active
function initialize(){
	addLightboxMarkup();
	lbox = document.getElementsByClassName('lbOn');
	for(i = 0; i < lbox.length; i++) {
		valid = new lightbox(lbox[i]);
	}
}

// Add in markup necessary to make this work. Basically two divs:
// Overlay holds the shadow
// Lightbox is the centered square that the content is put into.
function addLightboxMarkup() {
	bod 				= document.getElementsByTagName('body')[0];
	overlay 			= document.createElement('div');
	overlay.id			= 'overlay';
	lb					= document.createElement('div');
	lb.id				= 'lightbox';
	lb.className 		= 'loading';
	lb.innerHTML		= '<div id="lbLoadMessage">' +
						  '<p>Loading...</p>' +
						  '</div>';
	bod.appendChild(overlay);
	bod.appendChild(lb);
}