/*
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, aLB;

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

//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', 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,
	indexPage : 0,
	intervalDuration : 9,
	interval : 0,
	play : 1,

	initialize: function(ctrl) {
		this.content = ctrl.href;
		if(!ctrl.flash){
			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.hideFlash('hidden');
		this.displayLightbox("block");
	},
	
	hideFlash: function(visibility){
		embeds = document.getElementsByTagName('embed');
		for(i = 0; i < embeds.length; i++) {
			
			embeds[i].style.visibility = visibility;
		}
		objects = document.getElementsByTagName('object');
		for(i = 0; i < objects.length; i++) {
			
			objects[i].style.visibility = visibility;
		}
	
	},
	
	// 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;
		}
		

	},
	
	// 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;
		
		if(display != 'none'){
			
			$('lightbox').style.visibility = "visible";
			$('overlay').style.visibility = "visible";
			Effect.SlideDown($('lightbox'));
			Effect.Appear($('overlay'), {to:0.6});
			this.loadInfo();
		}else{
			var e = this;
			Effect.SlideUp($('lightbox'), {afterFinish: function(){e.clearBox(e);}});
			Effect.Fade($('overlay'));

		}
		

	},
	
	clearBox: function(e){
		
		$('lightbox').style.visibility = "hidden";
		$('overlay').style.visibility = "hidden";
		$('lightbox').innerHTML = '<div id="lbLoadMessage">' +
						  '<p>Loading</p>' +
						  '</div>';
						  
		if (parseInt(navigator.appVersion)>3) {
		 if (navigator.appName=="Netscape") {
		  winW = window.innerWidth;
		  winH = window.innerHeight;
		 }
		 if (navigator.appName.indexOf("Microsoft")!=-1) {
		  winW = document.body.offsetWidth;
		  winH = document.body.offsetHeight;
		 }
		}
		$('lightbox').style.display = 'block';
		$('lightbox').style.left = (winW/2 - $('lightbox').offsetWidth/2) + 'px';
		$('lightbox').style.top = (winH/2 - $('lightbox').offsetHeight/2) + 'px';
		e.hideFlash('visible');

	},
	
	// Begin Ajax request based off of the href of the clicked linked
	loadInfo: function() {
		if (parseInt(navigator.appVersion)>3) {
		 if (navigator.appName=="Netscape") {
		  winW = window.innerWidth;
		  winH = window.innerHeight;
		 }
		 if (navigator.appName.indexOf("Microsoft")!=-1) {
		  winW = document.body.offsetWidth;
		  winH = document.body.offsetHeight;
		 }
		}
		$('lightbox').style.left = (winW/2 - $('lightbox').offsetWidth/2) + 'px';
		$('lightbox').style.top = (winH/2 - $('lightbox').offsetHeight/2) + 'px';
		var myAjax = new Ajax.Request(
        this.content + "?index=" + this.indexPage + '&timer=' + this.intervalDuration,
        {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);
		
  		$('lightbox').className = "done";
		
		if($('reset')){
			this.indexPage = 1;
		}
		
		clearInterval(this.interval);
		var e = this;
		this.interval = window.setInterval(function() { e.getNextPage(e); }, this.intervalDuration * 1000 );
		this.actions();	

	},
	
	getNextPage: function(eventThis){
		eventThis.indexPage++;

		$('lightbox').innerHTML = '<div id="lbLoadMessage">' +
						  '<p>Loading</p>' +
						  '</div>';
		eventThis.loadInfo();
	},
	
	changeTimer: function(newDuration){
		this.intervalDuration = newDuration;
		if(this.play){
			clearInterval(this.interval);
			this.interval = setInterval(this.getNextPage, this.intervalDuration * 1000, this );

		}
	},
	
	
	
	// 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;};
		}

	},
	
	togglePlay: function() {
		if(this.play == 1){
			clearInterval(this.interval);
			$('linkToggle').innerHTML = $('linkToggle').innerHTML.replace('stop', 'start');
		}else{
			this.interval = setInterval(this.getNextPage, this.intervalDuration * 1000, this );
			$('linkToggle').innerHTML = $('linkToggle').innerHTML.replace('start', 'stop');
		}
		this.play = !this.play;
	},	
	
	// 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(){
		//Element.remove($('lbContent'));
		
		if (browser == "Internet Explorer"){
			this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}
		this.displayLightbox("none");
		clearInterval(this.interval);

		


	}
}

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

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

function adjustTimer(targ, selObj){
	for(i = 0; i < aLB.length; i++) {
		if(aLB[i]){
			valid = (aLB[i]);
			valid.changeTimer(selObj.options[selObj.selectedIndex].value);
		}
		
	}
}

// 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);
}