/*
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;

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

// 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);

var lightbox = Class.create();

lightbox.prototype = {

	yPos : 0,
	xPos : 0,

	initialize : function(ctrl) {
		this.content = ctrl.href;
		if (ctrl.id == "dd") {
			this.activate();
		}
		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') {
			close();
//			$('outerImageContainer').show();
			$('imageDataContainer').show();
			$('lightbox').setStyle({ width: '100%', height: 'auto', background: '' });
		}
		else {
//		$('outerImageContainer').hide();
		$('imageDataContainer').hide();
       $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'hidden' });

        var arrayPageSize = Lightbox.prototype.getPageSize();
        $('overlay').setStyle({ width: arrayPageSize[0] + 'px', height: arrayPageSize[1] + 'px' });

        new Effect.Appear('overlay', { duration: 0.2, from: 0.0, to: LightboxOptions.overlayOpacity });
        
        $('lightbox').setStyle({ top: '5%', left: '5%', width: '90%', height: '90%', background: '#F6F6F6' }).show();
        
        if (LightboxOptions.animate) $('loading').show();
		
		this.loadInfo();
		}
	},

	// Begin Ajax request based off of the href of the clicked linked
	loadInfo : function() {
		var myAjax = new Ajax.Request(this.content, {
			method : 'get',
			parameters: '',
			encoding: '',
			evalScripts: true,
			onComplete : this.processInfo.bindAsEventListener(this),
			onException : function(req, exception) {
				alert("The request had a fatal exception thrown.\n\n" + exception);
				return true; }
		});
	},
	



	// Display Ajax response
	processInfo : function(response) {
		// console.log(response.responseText);
		if (LightboxOptions.animate) $('loading').hide();
		info = "<div id='lbContent'>" + response.responseText + "</div>";
//		$('lbLoadMessage').insert( {
		$('outerImageContainer').insert( {
			before : 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),
			evalScripts : true
		});

	},

	// 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");
	}
}

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

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

// 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 = $$('body')[0];
//	bod.insert('<div id="overlay"></div>');
//	bod
//			.insert('<div id="lightbox" class="loading"><div id="lbLoadMessage"><p>Loading</p></div></div>');
//	$('lightbox').insert('<div id="lbLoadMessage"><p>Loading</p></div></div>');
}

// Close a lightbox that has already been opened
function close() {
	Element.remove($('lbContent'));
//	$('overlay').style.display = 'none';
//	$('lightbox').style.display = 'none';
	Lightbox.prototype.disableKeyboardNav();
	$('lightbox').hide();
    new Effect.Fade($('overlay'), { duration: 0.2 });
    $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'visible' });
}

Event.observe(document, 'keypress', function(e) {
	if (e.keyCode == Event.KEY_ESC)
		close();
});
Event.observe(document, 'click', function(e) {
	if (Event.element(e).id == 'overlay')
		close();
});