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

Modified by Simon Matt <simon.matt@yahoo.com>
Date: 25/09/2007

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 getBrowserInfoMyLightbox() {
	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', initializeMyLightbox, false);
Event.observe(window, 'load', getBrowserInfoMyLightbox, false);
Event.observe(window, 'unload', Event.unloadCache, false);

var mylightbox = Class.create();

mylightbox.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;};
		Event.observe($('overlayML'), 'click', this.deactivate.bindAsEventListener(this));
	},
	
	// Turn everything on - mainly the IE fixes
	activate: function(){
		this.getScroll();
		//this.prepareIE('100%', 'hidden');
		this.setScroll(0,0);
		if (browser == 'Internet Explorer'){
			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;
		}
	},
	
	// 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.parent.scrollTo(x, y); 
	},
	
	displayLightbox: function(display){
		var fixheight = function(obj)
		{
			var top = $('lightboxML').getStyle('top');
			var top = top.substr(0,top.length-2);
			var top = parseInt(top);
			if(($('lightboxML').scrollHeight + top) > $('overlayML').getHeight())
			{
				$('overlayML').style.height = ($('lightboxML').scrollHeight + top)+"px";
			}
		};
		
		var width = 640;
		if(emkbig == 1)
		{
			var width = 700;
		}
		if(display != 'none') this.loadInfo();
		if(display == 'block') {
			var height = document.body.scrollHeight;
			if(document.body.scrollHeight < window.innerHeight)
			{
				var height = window.innerHeight;
			}
			
			$('overlayML').setStyle({'opacity': '0', 'height': height + 'px'});
			$('overlayML').style.display = "block";
			//$('overlayML').morph('opacity:0.8');
			$('lightboxML').setStyle({'opacity': '0', 'left': (($('overlayML').getWidth()) / 2) + 'px'});
			$('lightboxML').setStyle({'width': '0px'});
			$('lightboxML').style.display = "block";
			//$('lightboxML').morph('opacity:1;width:640px;left:'+(($('overlayML').getWidth() - 640) / 2) + 'px;');
			new Effect.Parallel(
				[
					new Effect.Morph('overlayML', { sync: true, duration: 1, style: {'opacity':'0.8'}}), 
					new Effect.Morph('lightboxML', { sync: true, duration: 1, style: {
											'opacity':'1',
											'width':width+'px',
											'left': (($('overlayML').getWidth() - width) / 2) + 'px'
									},
									afterFinish:fixheight
						})
				], 
				{ duration: 1 }
			);
		} else {
			$('overlayML').style.display = "none";
			$('lightboxML').style.display = "none";
		}
	},
	
	// Begin Ajax request based off of the href of the clicked linked
	loadInfo: function() {
		this.showLoading();
		var myAjax = new Ajax.Request(
        this.content,
        {method: 'post', parameters: "", postBody: "_ajaxRequest=true" , evalJS: true , onComplete: this.processInfo.bindAsEventListener(this)}
		);
		
	},
	
	// Display Ajax response
	processInfo: function(response){
		this.hideLoading();
		info = "<div id='lbContent'>" + response.responseText + "</div>";
		new Insertion.Before($('lbLoadMessage'), info);
		$('lightboxML').className = "done";	
		this.actions();	
		$('overlayML').setStyle({'height': document.body.scrollHeight + 'px'});
	},
	
	// 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'));
	   this.setScroll(0,0);
	   this.showLoading();
	   var myAjax = new Ajax.Request(
			  link.href,
			  {method: 'post', parameters: "", postBody: "_ajaxRequest=true", onComplete: this.processInfo.bindAsEventListener(this)}
	   );
	},
	
	// Example of creating your own functionality once lightbox is initiated
	deactivate: function(){
		if($('lbContent')) {
			Element.remove($('lbContent'));
		}
		this.setScroll(0,this.yPos);
		this.prepareIE("auto", "auto");
		if (browser == "Internet Explorer"){
			this.hideSelects("visible");
		}
		
		this.displayLightbox("none");
	},
	
	showLoading: function() {
		if(window.innerHeight) {
			var windowHeight = window.innerHeight;
			var windowWidth  = window.innerWidth;
		} else if(document.documentElement.clientHeight) {
			var windowHeight = document.documentElement.clientHeight;
			var windowWidth  = document.documentElement.clientWidth;
		} else if(document.body.clientHeight) {
			var windowHeight = document.body.clientHeight;
			var windowWidth  = document.body.clientWidth;
		}
		$('xxlLoading').setStyle({'top':(document.documentElement.scrollTop + (windowHeight/2) - 25)+'px', 'left':(document.documentElement.scrollLeft + (windowWidth/2) - 25)+'px'});
		$('xxlLoading').style.display = 'block';
	},

	hideLoading: function() {
		$('xxlLoading').style.display = 'none';
	}
}

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

// Onload, make all links that need to trigger a lightbox active
function initializeMyLightbox(){
	addLightboxMarkup();
}

function initializeMyLightboxByClick(obj){
	valid = new mylightbox(obj);
	if (browser != 'Internet Explorer'){
		valid.activate();
	}
}

// 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			= 'overlayML';

	lb					= document.createElement('div');
	lb.id				= 'lightboxML';
	lb.className 		= 'loading';
	lb.innerHTML		= '<div id="lbLoadMessage"></div>';
	bod.appendChild(overlay);
	bod.appendChild(lb);
}