/*
Created By: Chris Campbell
Website: http://particletree.com/features/lightbox-gone-wild/
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 = {
var lightbox = Class.create({
	yPos : 0,
	xPos : 0,
	
	initialize: function(ctrl) {
		this.content = ctrl.onclick; // ctrl.href
		Event.observe(ctrl, 'click', this.activate.bindAsEventListener(this), 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){
		$('lbLoadMessage').style.display=display;
		if(display != 'none') 
		{
			$('overlay').appear({from: 0.0,	to:   0.8, afterSetup: function(effect) {
				$('lightbox').appear({ afterSetup: function(effect) {
						new Insertion.Before($('lbLoadMessage'), $("lbContent"));
						$('lbContent').appear();
					}});	
				//$('lbContent').appear();	
			  }});
			
			this.loadInfo();
		}
		else
		{
			$('overlay').fade({from: 0.8, to:   0.0, beforeSetup: function(effect) {
				$('lightbox').fade();
				//$('lbContent').fade();
			  }});
		}
	},
	
	// Begin Ajax request based off of the href of the clicked linked
	loadInfo: function() {
		$('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
	deactivate: function(){
		//	Element.remove($('lbContent'));
		$('lbContent').innerHTML="";
		
		if (browser == "Internet Explorer"){
			this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}
		
		this.displayLightbox("none");
	},
	
	/*
    Method: fire
      Fires a lightbox custom event automatically namespaced in "lightbox:" (see Prototype custom events).
      The memo object contains a "lightbox" property referring to the lightbox.


    Parameters:
      eventName - an event name
      memo      - a memo object

    Returns:
      fired event
  */
	fire: function(eventName, memo) {
	    memo = memo || { };
	    memo.lightbox = this;
	    return this.link.fire('lightbox:' + eventName, memo);
	 },
	 
	 /*
	    Method: observe
	      Observe a lightbox event with a handler function automatically bound to the lightbox

	    Parameters:
	      eventName - an event name
	      handler   - a handler function

	    Returns:
	      this
	  */  
	  observe: function(eventName, handler) {
		 Event.observe(this, 'lightbox:' + eventName, handler.bind(this));
	    return this;
	  }
});

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

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