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

Adapted By: Simon de Haan
Website: http://blog.eight.nl
Date: 21/2/2006

Adapted By: Qc Media
Website: http://www.qcmedia.ca
Date: 1/10/2007

Inspired by the lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
And the lightbox gone wild by ParticleTree at http://particletree.com/features/lightbox-gone-wild/

*/

/*-------------------------------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;
}

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


var lightbox = Class.create();

lightbox.prototype = {

	yPos : 0,
	xPos : 0,

	initialize: function( ctrl ) { 
		if ( ctrl != null ) { 
			this.content = ctrl.rel; 
			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 = height;
		bod.style.overflow = overflow;
  
		htm = document.getElementsByTagName('html')[0];
		htm.style.height = height;
		htm.style.overflow = overflow; 
	},
	
	// 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;
		}
		// Patch: Put selects inside the box back to normal
		selects = $(this.content).getElementsByTagName('select');
		for(i = 0; i < selects.length; i++) {
			selects[i].style.visibility = 'visible';
		}
	},
	
	// 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;
		$('overlay').setAttribute('onclick', 'pushLeightbox("'+this.content+'");'); 
		$(this.content).style.display = display;
		if(display != 'none') 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;};
		}

	},
	
	// Example of creating your own functionality once lightbox is initiated
	deactivate: function(){
		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() {
	if(!$('overlay')) {
		bod 				= document.getElementsByTagName('body')[0];
		overlay 			= document.createElement('div');
		overlay.id			= 'overlay';
		bod.appendChild(overlay);
	}
}


// Fonctions leightbox
function popLeightbox(id, title, width, height)
{
	var container = $(id);
	
	container.style.width	= width != null ? width+'px' : 525+'px';
	container.style.height	= height != null ? height+'px' : '525px';
	//container.style.overflow = height != null ? 'hidden' : 'auto';
	container.style.overflow = 'auto';
	
	// Centering in viewport
	centerInViewport(id);

	// Affichage
	var p = new lightbox(null);
	p.content = id;
	p.activate();
}

function pushLeightbox(id) {
	var p = new lightbox(null);
	p.content = id;
	p.deactivate();
}

function centerInViewport(id)
{
	var objref=document.getElementById(id);
	var ie=document.all && !window.opera;
	var t;

	iebody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body;
	var scroll_top=(ie)? iebody.scrollTop : window.pageYOffset;
	var docwidth=(ie)? iebody.clientWidth : window.innerWidth;
	var docheight=(ie)? iebody.clientHeight: window.innerHeight;
	var objwidth=objref.style.width.substr(0, objref.style.width.length - 2);
	var objheight=objref.style.height.substr(0, objref.style.height.length - 2);
	objref.style.left=(docwidth/2-objwidth/2)-30+"px";
	objref.style.top=((t = scroll_top+docheight/2-objheight/2-30) < 5 || objheight == '' ? 5 : t) +"px";
	
	/*var docwidth = 0, myHeight = 0;
	if( typeof( window.innerWidth ) == 'number' ) {
	//Non-IE
	docwidth = window.innerWidth;
	docheight = window.innerHeight;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
	//IE 6+ in 'standards compliant mode'
	docwidth = document.documentElement.clientWidth;
	docheight = document.documentElement.clientHeight;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
	//IE 4 compatible
	docwidth = document.body.clientWidth;
	docheight = document.body.clientHeight;
	}*/
}