/*
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);
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(){
		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') this.loadInfo();
	},
	
	// Begin Ajax request based off of the href of the clicked linked
	loadInfo: function() {
		$('lightbox').removeClassName('done');
		var myAjax = new Ajax.Request(
		this.content,
		{method: 'get', parameters: {isInLightbox: 'true'}, 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++) {
			// AVE! : modified to support elements other than <a/>
			// class name specified after 'lbAction' are special.
			// 1: name of lightbox action
			// 2: name of a form to submit using ajax.
			// 3. name of an event
			// Parameter 2 and 3 are used only when you specify 'invoke' as parameter 1.
			// If you need to specify general class names, 
			// write them before 'lbAction'.
			var evnt = '';
			var effective = false;
			lbActions[i].classNames().each( function (cls) {
				if (cls == 'lbAction') { effective = true; } 
				else if ( effective ) { evnt = cls; throw $break; }
			});
			if (evnt == '') { evnt = lbActions[i].rel; }
			Event.observe(lbActions[i], 'click', this[evnt].bindAsEventListener(this), false);			lbActions[i].onclick = function(){return false;};
		}
	},

	// AVE! : submit form using ajax.
	invoke: function(e){
		var formInfo = new Array();
		var idx = -1;
		Event.element(e).classNames().each( function (cls) {
			if (cls == 'lbAction') { idx = 0; } 
			else if (idx == 0) { idx = 1; } // skip lbaction name
			else if (idx > 0) { formInfo[idx++ - 1] = cls; }
		});
		var act = $(formInfo[0]).action;
		var params = $H($('sendMessageForm').serialize(true));
		// Append special parameter.
		params.merge({isInLightbox: 'true'});
		if (formInfo[1] != null) params[formInfo[1]] = '';
		Element.remove($('lbContent'));
		$('lightbox').removeClassName('done');
		new Ajax.Request(act,
			{ method: 'post', parameters: params, onComplete: this.processInfo.bindAsEventListener(this)}
		)
	},
	
	// 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: {isInLightbox: 'true'}, 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");
		}
		
		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]);
	}
}

// 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">' +
						  '<div style="text-align:center;margin:100px;"><img src="images/ajax-loader2.gif" class="icon-load2"/></div>' +
						  '</div>';
	bod.appendChild(overlay);
	bod.appendChild(lb);
}