/*
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('firefox')) browser 		= "Firefox"
	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;
}

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

document.observe('dom:loaded', initialize, false);
document.observe('dom:loaded', getBrowserInfo, false);

var lightbox = Class.create();

lightbox.prototype = {

	yPos : 0,
	xPos : 0,

	initialize: function(ctrl, dontBind) {
	    if(!dontBind){	
		    this.content = ctrl.href;		
		    Event.observe(ctrl, 'click', this.activate.bindAsEventListener(this), false);
		    //ctrl.onclick = function(){return false;};
        } else {   
            this.content = ctrl.href;
            this.activate();	    
        }
	},
	
	
	// Turn everything on - mainly the IE fixes
	activate: function(e){
	
	// only show the lightbox if there is enough space and we're not 
	// with Firefox on a Mac as that one's got a naughty bug.
	if(document.viewport.getHeight() > 550 && !(browser == 'Firefox' && version == '2' && OS == 'Mac') ) {
	
	    e ? Event.stop(e) : null;
		
		if (browser == 'Internet Explorer'){
			this.getScroll();
			this.prepareIE('100%', 'hidden');
			this.setScroll(0,0);
			this.hideSelects('hidden');
		}
		this.cachedDeactivate = this.deactivate.bindAsEventListener(this);
		$('overlay').observe('click', this.cachedDeactivate);
		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();
		    $('container', 'title').invoke('addClassName', 'printhide');
		    }
	},
	
	getDefaultParams: function(){	
	    var dims = document.viewport.getDimensions();
	    dims.ajax = 1;
	    return dims;
	},
	
	// Begin Ajax request based off of the href of the clicked linked
	loadInfo: function() {
		var myAjax = new Ajax.Request(
        this.content,
        {method: 'post', parameters: this.getDefaultParams(), onSuccess: this.processInfo.bind(this), onFailure: this.cachedDeactivate}

		);
		
	},
	
	// Display Ajax response
	processInfo: function(response, json){
		info = "<div id='lbContent'>" + response.responseText + "</div>";
		new Insertion.Before($('lbLoadMessage'), info)
		$('lightbox').className = "done";
		json ? $('lightbox').setStyle(json) : $('lightbox').setStyle({height: '700px', width: '800px', marginLeft: '-400px', marginTop: '-350px'});
		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'));
	   $('lightbox').className = "loading";
	 
	   var myAjax = new Ajax.Request(
			  link.href,
			  {method: 'post', parameters: this.getDefaultParams(), onSuccess: this.processInfo.bind(this), onFailure: this.cachedDeactivate}
	   );
	 
	},
	
	// Example of creating your own functionality once lightbox is initiated
	deactivate: function(){
	
		if(Object.isElement($('lbContent'))){
		    $('lbContent').remove();		
		}
		
		$('container', 'title').invoke('removeClassName', 'printhide');
		
		$('overlay').stopObserving('click', this.cachedDeactivate);
			
		if (browser == "Internet Explorer"){
			this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}
		
		this.displayLightbox("none");
	},
	//function to open page and print - called by <a class="lbAction" rel="printThisPage"
	printThisPage: function(){
	    var myWindow;
	    myWindow = window.open(this.content, "print", "width=700,height=500,resizable=yes,menubar=yes,location=yes,scrollbars=yes,status=yes");
	    Event.observe(myWindow, 'load', function(e){
	            myWindow.print();
            });
	        
	        myWindow.focus();
	        
	        (browser == "Safari") ? myWindow.alert("Safari cannot automatically print this window. Please choose 'Print' from the file menu to print this page.") : null;
	}	
}

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

// 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">' +
						  '<p>Loading</p><p><img src="/images/loading.gif" alt="" /></p><p><a class="lbAction" rel="deactivate" href="#">close popup</a></p>' +
						  '</div>';
	bod.appendChild(overlay);
	bod.appendChild(lb);
	window.lightboxmarkupadded = true;
}