/*
Created By: Chris Campbell
Modified By: Noah Winecoff (http://www.findmotive.com)
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;
}

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

Event.observe(window, 'load', lightbox_init, false);
Event.observe(window, 'load', getBrowserInfo, false);
Event.observe(window, 'unload', Event.unloadCache, false);

var lightbox = Class.create();
var lightbox_lbid=0;

lightbox.prototype = {
	loaded:false,
	yPos : 0,
	xPos : 0,
	refresh :false,
	
	initialize: function(ctrl) {
		this.title = ctrl.name;
		this.content = ctrl.href;
		this.lbid = ctrl.id || lightbox_lbid++;
		this.myElementID = "lbContent_"+this.lbid;
		
		Event.observe(ctrl, 'click', this.activate.bindAsEventListener(this), false);
		ctrl.onclick = function(){return false;};
		ctrl.style.visibility='visible';
	},
	
	// 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");
		
		if(window.lbActivated){
			window.lbActivated();
		} else {
			this.hideEmbeds('hidden');
		}
		myLightbox = this;
	},
	
	// 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;
		if (height == "auto")
			bod.style.width  = "98%";
		else
			bod.style.width = "auto";
		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){
		if (browser == 'Internet Explorer'){
			var selects = document.getElementsByTagName('select');
			for(var i = 0; i < selects.length; i++) {
				selects[i].style.visibility = visibility;
			}
		}

	},
	hideEmbeds: function(visibility){
		var embeds = document.getElementsByTagName('embed');
		if (visibility=='hidden')
		{
			this.embedsHidden=true;
			visibility='none';
		}
		else
			visibility='block';
		for (var i = 0; i < embeds.length; i++) {
			embeds[i].style.display=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;
		var lbcontent = $('lbContent_' + this.lbid);
		if (lbcontent)
			lbcontent.style.display = display;
		if(display != 'none') this.loadInfo();
	},
	
	// Write an iFrame instead of using an AJAX call to pull the content
	loadInfo: function() {
		//alert(this.refresh);
		if (this.loaded && !this.refresh)
		{
			var frame = $('lbIframe_'+this.lbid);
			if (frame) {
				if (frame.src != this.content)
					frame.src = this.content;
				else
					frame.src = this.content+"#1";
			}
			return;
		}
		else
			this.loaded=true;

		info = "<div class='lbContent' id='"+(this.myElementID)+"'><div class='lbHeader' id='lbHeader_"+this.lbid+"'><div class='lbTitle' id='lbTitle_"+this.lbid+"'>" + this.title + "</div><a href='#' class='lbAction' rel='deactivate'><img style='width:16px;height:16px;' src='/lib/icons/cross.png' alt='close'/></a></div><iframe class='lbIframe' id='lbIframe_"+this.lbid+"' frameborder=\"0\" src=\"" + this.content + "\"</iframe></div>";
		new Insertion.Before($('lbLoadMessage'), info)
		$('lightbox').className = "done";
		this.actions();			
		this.loaded=true;
	},
	
	// 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
	insert: function(e){
	//	try {
	//		lbInsertCallback(e);
	//	} catch(err) { }
	},
	
	// Example of creating your own functionality once lightbox is initiated
	deactivate: function(refresh){
		if (refresh)
			this.refresh=true;
		if(this.refresh){
			Element.remove($(this.myElementID));
		}
		
		if (browser == "Internet Explorer"){
			this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
		}
		this.hideSelects("visible");
		
		this.displayLightbox("none");
		if (window.lbDeactivated)
		{
			window.lbDeactivated();
		}
		if (this.embedsHidden) {
			this.embedsHidden=false;
			this.hideEmbeds("visible");
		}
	},
	
	setRefresh: function(val){
		//alert("setRefresh: " + val);
		this.refresh = val;
	}
}

/*-----------------------------------------------------------------------------------------------*/
var lightboxInitDone;

// Onload, make all links that need to trigger a lightbox active
function lightbox_init(){
	if(lightboxInitDone)
		return;

	addLightboxMarkup();
	lbox = document.getElementsByClassName('lbOn');
	for(i = 0; i < lbox.length; i++) {
		myLightbox = 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">' + 'loading' + '</div>';
	bod.appendChild(overlay);
	bod.appendChild(lb);
}