/*
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;
var gt;
var lb;
var currentHeight;
//var finalHeight = 400;
var initHeight = '40px';
var valid = new Array();
var currentIdx = 0;
var hiddenVidId = 0;
/*-----------------------------------------------------------------------------------------------*/


//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,
	linkIdx : 0,

	initialize: function(ctrl, newIdx) {
		this.linkIdx = newIdx;
		this.params = ctrl.name.split(',', 6);
		this.content = this.params[0];
		this.boxWidth = this.params[1];
		this.boxHeight = this.params[2];
		this.boxColor = this.params[3];
		this.topPercent = this.params[4];
		this.sceneNumber = this.params[5];
		if (browser == "Internet Explorer"){
			//this.boxWidth = parseInt(this.boxWidth) + 70;
			this.boxHeight = parseInt(this.boxHeight) + 40;
			//this.topPercent = parseInt(parseInt(this.topPercent) * 0.75) ;
		}
		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;
		}
	},
	
	// 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.width = this.boxWidth;
			$('lightbox').style.backgroundColor = this.boxColor;
			$('lightbox').style.top = this.topPercent + '%';
			sdDiv = document.getElementById('container' + this.sceneNumber);
			sdDiv.style.visibility = 'hidden';
			hiddenVidId = this.sceneNumber;
			finalHeight = this.boxHeight;
			finalWidth = this.boxWidth;
			currentIdx = this.linkIdx;
			gt = setTimeout('erect()', 100);
		}
	},


	
	// 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)}
	   )
	
	},

	newPage: function(url) {
	   Element.remove($('lbContent'));
	   var myAjax = new Ajax.Request(
			  url,
			  {method: 'get', parameters: "", onComplete: this.processInfo.bindAsEventListener(this)}
	   )

	},
	
	// Example of creating your own functionality once lightbox is initiated
	deactivate: function(){
		Element.remove($('lbContent'));
		sdDiv = document.getElementById('container' + hiddenVidId);
		sdDiv.style.visibility = 'visible';
		
		if (browser == "Internet Explorer"){
			this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");

		}
		lb.style.height = initHeight;
		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[i] = new lightbox(lbox[i], i);
	}
}


function erect() {
		currentHeight = Number(lb.style.height.substr(0,lb.style.height.indexOf('px')));
		currentWidth = Number(lb.style.width.substr(0,lb.style.width.indexOf('px')));
		moreErect = false;
		if (currentHeight < finalHeight) {
			lb.style.height = ((currentHeight + 70 > finalHeight) ? finalHeight : currentHeight + 70) + "px";
			moreErect = true;
		}
		if (currentHeight >= finalHeight) {
			lb.style.height = finalHeight + "px";
		}
		if (currentWidth < finalWidth) {
			lb.style.width = ((currentWidth + 70 > finalWidth) ? finalWidth : currentWidth + 70) + "px";
			moreErect = true;
		}
		if (currentWidth >= finalWidth) {
			lb.style.width = finalWidth + "px";
		}
		if (moreErect) {
			gt = setTimeout('erect()', 100);
		}
		else {
			valid[currentIdx].loadInfo();
		}
	}
// 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.

var clickCloseFunction;
function overlayClick() {
	lightbox.prototype.deactivate();
}


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">' +
						  '<center><p>&nbsp;</p><p>&nbsp;</p><p></p></center>' +
						  '</div>';
	bod.appendChild(overlay);
	bod.appendChild(lb);
	lb.style.height = initHeight;
	//setup click on overlay
Event.observe('overlay', 'click', overlayClick.bindAsEventListener(lightbox.prototype), false);
}