/*
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 lightboxON = false;

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

// 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();

var els = new Array();

function waitforlightbox(ev)
{
	if(lightboxON == false)
	{
		Event.stop(ev);
	}
}

lightbox.prototype = {

	yPos : 0,
	xPos : 0,
	content2: "",

	initialize : function(ctrl) {
		if(typeof(ctrl) != "undefined")
		{
			this.content = ctrl.href;
			//alert(this.content);
			Event.observe(ctrl, 'click', this.activate.bindAsEventListener(this),
				false);
			ctrl.onclick = function() {				
			return false;
			};
			//ctrl.disabled = "";
		}
	},

	// Turn everything on - mainly the IE fixes
	activate : function() {
		if(typeof(the_target) != "undefined")
		{
			this.content = the_target;
		}
		if (browser == 'Internet Explorer') {
			this.getScroll();
			this.prepareIE('100%', 'hidden');
			this.setScroll(0, 0);
			this.hideSelects('hidden');
		}
		// Added by Yosi, BPH - hide objects (visibility = hidden)
		this.hideObjects('hidden');
		this.displayLightbox("block");
	},

	activate2 : function() {
		if (browser == 'Internet Explorer') {
			this.getScroll();
			this.prepareIE('100%', 'hidden');
			this.setScroll(0, 0);
			this.hideSelects('hidden');
		}
		this.content = this.content2;
		// Added by Yosi, BPH - hide objects (visibility = hidden)
		this.hideObjects('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;
		}
	},

	// Object elements hover on top of the lightbox
	hideObjects : function(visibility) {
		objects = document.getElementsByTagName('object');
		for (i = 0; i < objects.length; i++) {
			objects[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')
			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) {
		aaa = "<div id='lbContent'>" + response.responseText + "</div>";
		new Insertion.Before($('lbLoadMessage'), aaa);
		$('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") {
			this.setScroll(0, this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}
		// Added by Yosi, BPH - show objects (visibility = 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++) {
		valid = new lightbox(lbox[i]);
	}
	lightboxON = true;
}

function initialize2(anch) {
	valid = new lightbox(anch);
	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 = 'overlay';
	lb = document.createElement('div');
	lb.id = 'lightbox';
	lb.className = 'loading';
	lb.innerHTML = '<div id="lbLoadMessage">' + '<center><div style="padding-top: 30%;"><img src="images/ajax_loading_big.gif" /></div></center>' + '</div>';
	bod.appendChild(overlay);
	bod.appendChild(lb);
}