/*
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/


--- altered by J in jan 2009 to get it to work properly with ie. 
1. add documentSize and getScrollXY so fill page
2. use docsize to set position of modal window.
*/

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

var detect = navigator.userAgent.toLowerCase();
//alert(detect);
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 7')) browser 	= "Internet Explorer 7"
	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,

	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(){
		$('lightbox').className = "loading";	
		this.hideObjects('hidden');
		if (browser == 'Internet Explorer 71'){
			this.getScroll();
			this.prepareIE('100%', 'hidden');
			this.setScroll(0,0);
			this.hideSelects('hidden');
			$('overlay').style.width=this.alertSize('width')+this.getScrollXY('width');
			
			$('overlay').style.height=this.alertSize('height')+this.getScrollXY('height');
		} else if (browser == 'Internet Explorer 7'){
			this.getScroll();
			this.prepareIE('100%', 'hidden'); 
			//this.setScroll(0,0);
			this.hideSelects('hidden');
			$('overlay').style.width=this.documentSize('width')+this.getScrollXY('width');
			$('overlay').style.height=this.documentSize('height')+this.getScrollXY('height');
			
			//$('lightbox').style.top+=this.getScrollXY('width');
			$('lightbox').style.top=parseFloat($('overlay').style.height) / 2;
		}
		else if (browser == 'Internet Explorer'){
			//this.getScroll();
			this.prepareIE('100%', 'hidden'); 
			//this.setScroll(0,0);
			this.hideSelects('hidden');
			$('overlay').style.width=this.documentSize('width')+this.getScrollXY('width');
			$('overlay').style.height=this.documentSize('height')+this.getScrollXY('height');
			
			//$('lightbox').style.top+=this.getScrollXY('width');
			$('lightbox').style.top=parseFloat($('overlay').style.height) / 2;
			
			//alert($('lightbox').style.top);
			
		}
		//alert('I\'me here'); 
		//this.displayLightbox("block");
		this.funkydisplayLightbox("block");
		//Effect.Appear('overlay', { duration: 10.0 });
		
	},
	
	// 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; 
		
		
	},
	
	getScrollXY:function (type) {
  	  var scrOfX = 0, scrOfY = 0;
	  if( typeof( window.pageYOffset ) == 'number' ) {
		//Netscape compliant
		scrOfY = window.pageYOffset;
		scrOfX = window.pageXOffset;
	  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
		//DOM compliant
		scrOfY = document.body.scrollTop;
		scrOfX = document.body.scrollLeft;
	  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
		//IE6 standards compliant mode
		scrOfY = document.documentElement.scrollTop;
		scrOfX = document.documentElement.scrollLeft;
	  }
	  
	  if(type == 'width')
	  {
		  return scrOfX;
	  }
	  else if(type == 'height')
	  {
		   return scrOfY
	  }
	},
	
	documentSize: function (type) {
	  var myWidth = 0, myHeight = 0;
	  if( typeof( window.innerWidth ) == 'number' ) {
		//Non-IE
		myWidth = window.innerWidth;
		myHeight = window.innerHeight;
	  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		//IE 6+ in 'standards compliant mode'
		myWidth = document.documentElement.clientWidth;
		myHeight = document.documentElement.clientHeight;
	  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		//IE 4 compatible
		myWidth = document.body.clientWidth;
		myHeight = document.body.clientHeight;
	  }
	  
	  if(type == 'width')
	  {
		  return myWidth;
	  }
	  else if(type == 'height')
	  {
		   return myHeight
	  }
	 // window.alert( 'Width = ' + myWidth );
	 // window.alert( 'Height = ' + myHeight );
	},
	
	// 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;
		}
		this.hideObjects(visibility);
	},
	hideObjects: function(visibility){
		objects = document.getElementsByTagName('object');
		if(visibility=='hidden')
		{
			visibility='none';
		}
		else
		{
			visibility='inline';
		}
		for(i = 0; i < objects.length; i++) {
			if(typeof showFlash!="undefined")
			{
				if(visibility=='none')
				{
					showFlash(false,'current \'window\' has been closed');
				}
				else
				{
					showFlash(true,'');
				}
			}
			else
			{
				objects[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){
		//Effect.Appear('overlay');
		//Effect.Appear('lightbox');
		$('overlay').style.display = display;
		$('lightbox').style.display = display;
		if(display != 'none') this.loadInfo();
	},
	
	funkydisplayLightbox: function(display){
		//Effect.Appear('overlay');
		//Effect.Appear('lightbox');
		$('overlay').style.display = display;
		
		$('lightbox').style.display = display;
		
		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)
		$('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;};
		}

	},
	
	// 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 7"){
			//this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}
		else if (browser == "Internet Explorer"){
			//this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}
		this.hideObjects("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++) {
		// added by J, skip those objects already registered
		if(lbox[i]._eventID==null)
		{
			valid = new lightbox(lbox[i]);
		}
	}
}

// Onload, make all links that need to trigger a lightbox active
function updateLightBox(){
	if(document.getElementsByClassName('lbOn')!=null)
	{
		//Event.unloadCache(); : not available in new prototype
		lbox = document.getElementsByClassName('lbOn');
		for(i = 0; i < lbox.length; i++) {
			
			// added by J, skip those objects already registered
			if(lbox[i]._eventID==null)
			{
				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	= '<center><div id="lbLoadMessage">' +
						  '<img src="/images/lookNfeel/ajax-loader2.gif" alt="Loading..."/>' +
						  '</div></center>';
						  //
	bod.appendChild(overlay);
	bod.appendChild(lb);
}