/*
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 LB_DURATION = 300;
var LB_Step = 100;

var lbLinks = new Object();
var currentLbLink = null;

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

//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.serial =  ctrl.getAttribute("serial");
		this.content = ctrl.getAttribute("href");
		this.lbSuccess = ctrl.getAttribute("lbSuccess");
		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");
		
		currentLbLink = lbLinks[ this.serial ];
	},
	
	// 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){

        var lbContainer = $('lightboxFixed');
        lbContainer.style.display = display;
        
		$('overlay').style.display = display;

        var lb = $('lightbox');
        lb.style.display = display;
        
        if(display != 'none'){
            this.loadInfo();
        } else {
    		$('lightbox').className = "loading";
        }
    },

	// Begin Ajax request based off of the href of the clicked linked
	loadInfo: function() {
	    var myAjax = new Ajax.Request(
        this.content,
        {method: 'get', parameters: "", 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++) {
			Event.observe(lbActions[i], 'click', this[lbActions[i].getAttribute('rel')].bindAsEventListener(this), false);
			lbActions[i].onclick = function(){return false;};
		}
		
		axeLists = document.getElementsByClassName('axefSelectionList');
		
		for(i = 0; i < axeLists.length; i++) {
			Event.observe(axeLists[i], 'click', AXEF.Widgets.clickHandler.bindAsEventListener(this), false);
			Event.observe(axeLists[i], 'mouseover', AXEF.Widgets.mouseoverHandler.bindAsEventListener(this), false);
			Event.observe(axeLists[i], 'mouseout', AXEF.Widgets.mouseoutHandler.bindAsEventListener(this), false);
		}

		axeValues = document.getElementsByClassName('axefSelectedItems');
		for(i = 0; i < axeLists.length; i++) {
			Event.observe(axeValues[i], 'keyup', AXEF.Widgets.syncInput.bindAsEventListener(this), false);
		}
		
		axeLists = document.getElementsByClassName('axefSingleSelection');
        for(i = 0; i < axeLists.length; i++) {
			Event.observe(axeLists[i], 'click', AXEF.Widgets.mouseoverHandler2.bindAsEventListener(this), false);
			Event.observe(axeLists[i], 'mouseover', AXEF.Widgets.mouseoverHandler.bindAsEventListener(this), false);
			Event.observe(axeLists[i], 'mouseout', AXEF.Widgets.mouseoutHandler.bindAsEventListener(this), 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)}
	   );
	 
	},
	
	// 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++) {
		lbox[i].setAttribute("serial", i);
		lbLinks[i] = 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];
    lightboxFixed = document.createElement('div');
    lightboxFixed.id = 'lightboxFixed';
    overlay = document.createElement('div');
    overlay.id = 'overlay';
    lb = document.createElement('div');
    lb.id = 'lightbox';
    lb.className = 'loading';
    lb.innerHTML = "<div id='lbLoadMessage'>載入中，請稍待 …</div>";
    bod.appendChild(lightboxFixed);
    lightboxFixed.appendChild(overlay);
    lightboxFixed.appendChild(lb);
}


_easeInOut = function(t,b,c,d)
{
	return c/2 * (1 - Math.cos(Math.PI*t/d)) + b;
}

	function fade( target )
	{
        var _step = 0;
        
		var fadeTimer = setInterval(

			function(){

				if( _step < LB_DURATION)
				{
	                var ieop = Math.round( _easeInOut( _step, 0, 1, LB_DURATION ) * 100 );
	                var op = ieop / 100;
	                target.style.opacity = op;
	                target.style.filter = "alpha(opacity="+ieop+")";
				}
				else
				{
					clearInterval(fadeTimer);
				}
	            _step += LB_Step;
			},
			LB_Step
		);
	}