/*
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 defaultLightbox;
var lightboxJsLightboxId = 'lightbox';
var lightboxJsLightboxClass = 'lightbox';
var lightboxJsOverlayClass = 'overlay';

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

//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;
}

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

//ProtoEvent.observe(window, 'load', initialize, false);
//ProtoEvent.observe(window, 'load', getBrowserInfo, false);
ProtoEvent.observe(window, 'unload', ProtoEvent.unloadCache, false);


var lightbox = Class.create();

lightbox.prototype = {

	yPos : 0,
	xPos : 0,

	initialize: function(ctrl) {
		this.content = ctrl.href;
		ProtoEvent.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");
	},
	activate_custom: function(lightboxClass, overlayClass) {
	    if (browser == 'Internet Explorer') {
	        this.getScroll();
	        this.prepareIE('100%', 'hidden');
	        this.setScroll(0, 0);
	        this.hideSelects('hidden');
	    }

	    this.displayLightbox_custom("block", lightboxClass, overlayClass);
	},
	// 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; 		
	},
	
	// Ie requires height to 100% and overflow hidden or else you can scroll down past the lightbox
	//IE6 sets the horizontal scrollbar on closing light box and to disable it.
	prepareIE6: function(height, overflow, overflowX){
		bod = document.getElementsByTagName('body')[0];
		bod.style.height = height;
		bod.style.overflow = overflowX;
  
		htm = document.getElementsByTagName('html')[0];
		htm.style.height = height;
		htm.style.overflowY = overflow;
		htm.style.overflowX = overflowX; 		
	},
	// In IE, select elements hover on top of the lightbox
	hideSelects: function(visibility){
		selects = document.getElementsByTagName('select');
		for(i = 0; i < selects.length; i++) {
			if(selects[i].className != 'hidden'){
				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;
		}			
	
	},	
	
	getScroll_Custom: 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;
		}			
		
		arrayPageScroll = new Array('',this.yPos) 
	    return arrayPageScroll;
	},	
	
	setScroll: function(x, y){
		window.scrollTo(x, y); 
	},
	
	displayLightbox: function(display){
	if ($(lightboxJsOverlayClass) != null) $(lightboxJsOverlayClass).style.display = display;
		if($(lightboxJsLightboxClass) != null) $(lightboxJsLightboxClass).style.display = display;
		if(display != 'none') this.loadInfo();
    },

    displayLightbox_custom: function(display, lightboxClass, overlayClass) {
        if ($(overlayClass) != null) $(overlayClass).style.display = display;
        if ($(lightboxClass) != null) $(lightboxClass).style.display = display;
        if (display != 'none') this.loadInfo();
    },
	
	// Begin ProtoAjax request based off of the href of the clicked linked
	loadInfo: function() {
		var myAjax = new ProtoAjax.Request(
        this.content,
        {method: 'post', parameters: "", onComplete: this.processInfo.bindAsEventListener(this)}
		);
		
	},
	
	// Display ProtoAjax 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++) {
			ProtoEvent.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 = ProtoEvent.element(e).parentNode;
	   Element.remove($('lbContent'));
	 
	   var myAjax = new ProtoAjax.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'));
	    this.setScroll(0,this.yPos);		
	    this.prepareIE6("auto", "auto", "hidden");
		if (browser == "Internet Explorer"){
			this.hideSelects("visible");
		}	
		this.displayLightbox("none");
		
	},
	deactivate_custom: function(lightboxClass, overlayClass) {
	    Element.remove($('lbContent'));
	    this.setScroll(0, this.yPos);
	    this.prepareIE("auto", "auto");
	    if (browser == "Internet Explorer") {
	        this.hideSelects("visible");
	    }
	    this.displayLightbox_custom("none", lightboxClass, overlayClass);
	}
}

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

// 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]);
//	}
//}

function initialize(){ 
      var lightboxId = "defaultLightbox";
      addLightboxMarkup(); 
      lbox = document.getElementsByClassName('lbOn'); 
      for(i = 0; i < lbox.length; i++) {
            valid = new lightbox(lbox[i]); 
            if(lbox[i].id == lightboxId) { 
                  defaultLightbox = valid; 
            } 
      }
      
      activateDefaultLightBox();
}

//intialize ('defaultLightbox', 'lightbox_full')
function initialize_custom(lightboxId, lightboxClass, overlayClass) {
    lightboxJsLightboxId = lightboxId;
    lightboxJsLightboxClass = lightboxClass;
    lightboxJsOverlayClass = overlayClass;
    addLightboxMarkup();
    lbox = document.getElementsByClassName('lbOn');
    for (i = 0; i < lbox.length; i++) {
        valid = new lightbox(lbox[i]);
        if (lbox[i].id == lightboxId) {
            defaultLightbox = valid;
        }
    }
    activateDefaultLightBox();
}

function IEFixDropdown()
{
	if (browser == 'Internet Explorer')
	{
	    if ($(lightboxJsLightboxId) != null)
		{
		    var display = $(lightboxJsLightboxId).style.display;
			if (display == 'block')	    
			{
			   defaultLightbox.hideSelects('hidden');
			}
		}
    }
}

function FixScroll()
{   
    defaultLightbox.getScroll();
    defaultLightbox.prepareIE('100%', 'hidden');
    defaultLightbox.setScroll(0,0);
}

function FixScrollForEM()
{   
    defaultLightbox.getScroll_Custom();
    defaultLightbox.prepareIE('100%', 'hidden');
    defaultLightbox.setScroll(0,0);
}

// 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 = lightboxJsOverlayClass;
    lb = document.createElement('div');
    lb.id = lightboxJsLightboxClass;
    lb.className = 'loading';
    lb.innerHTML = '<div id="lbLoadMessage">' +
	    '<p></p>' +
	    '</div>';
    bod.appendChild(overlay);
    bod.appendChild(lb);
}

function activateDefaultLightBox() { 
	if(defaultLightbox != undefined) { 
	 	defaultLightbox.activate(); 
	} 
}

var lightbox_timer;

function lightbox_StopTimer() 
{
	clearTimeout(lightbox_timer);
}

function initialize_deactivateTimer(lightboxId, lightboxClass, overlayClass, ms) {
    addLightboxMarkupCustom(lightboxClass, overlayClass);
    lbox = document.getElementsByClassName('lbOn');
    for (i = 0; i < lbox.length; i++) {
        valid = new lightbox(lbox[i]);
        if (lbox[i].id == lightboxId) {
            defaultLightbox = valid;
        }
    }
    lbId = lightboxId;
    activateDefaultLightBoxCustom(lightboxClass, overlayClass);
    deActivateDefaultLightBoxCustomTimer(lightboxClass, overlayClass, ms);
}

function addLightboxMarkupCustom(lightboxClass, overlayClass) {
    bod = document.getElementsByTagName('body')[0];
    overlay = document.createElement('div');
    overlay.id = overlayClass;
    lb = document.createElement('div');
    lb.id = lightboxClass;
    lb.className = 'loading';
    lb.innerHTML = '<div id="lbLoadMessage">' +
						  '<p></p>' +
						  '</div>';
    bod.appendChild(overlay);
    bod.appendChild(lb);
}

function activateDefaultLightBoxCustom(lightboxClass, overlayClass) {
    if (defaultLightbox != undefined) {
        defaultLightbox.activate_custom(lightboxClass, overlayClass);
    }
}

function deActivateDefaultLightBoxCustomTimer(lightboxClass, overlayClass, ms) {
    if (defaultLightbox != undefined) {
        lightbox_timer = setTimeout("defaultLightbox.deactivate_custom('" + lightboxClass + "','" + overlayClass + "')", ms);
    }
}