/*
	Lightbox JS: Fullsize Image Overlays 
	by Lokesh Dhakar - http://www.huddletogether.com

	For more information on this script, visit:
	http://huddletogether.com/projects/lightbox/

	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
	(basically, do anything you want, just leave my name and link)
	
	Table of Contents
	-----------------
	Configuration
	
	Functions
	- getPageScroll()
	- getPageSize()
	- pause()
	- getKey()
	- listenKey()
	- showLightbox()
	- hideLightbox()
	- initLightbox()
	- addLoadEvent()
	
	Function Calls
	- addLoadEvent(initLightbox)

*/



//
// Configuration
//

// If you would like to use a custom loading image or close button reference them in the next two lines.

var loadingImage = 'images/loading.gif';		
var closeButton = 'images/close.gif';	

//JG -- this has been altered to a global to facilitate the event model
var objLink; 
var imgPreload;
var origScroll;		//the original value of the scroll bar when the image is rendered; used to see if user scrolled after generating lightbox.

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//

function getKey(e){
	if (e == null) { // ie
		keycode = event.keyCode;
	} else { // mozilla
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();
	
	if(key == 'x'){ hideLightbox(); }
}


//
// listenKey()
//
function listenKey () {	document.onkeypress = getKey; }
	

//
// showLightbox()
// Preloads images. Pleaces new image in lightbox then centers and displays.
//
function showLightbox(objThis)
{
	objLink = objThis;
	
	//JG -- if word documents or spreadsheet or pdf, just take them straight to it.
	if (objLink.href.indexOf(".doc") >= 0 || objLink.href.indexOf(".xls") >= 0 || objLink.href.indexOf(".pdf") >= 0)
		window.location = objLink.href;
	
	// prep objects
	var objOverlay = $('overlay');
	var objLightbox = $('lightbox');
	var objCaption = $('lightboxCaption');
	var objImage = $('lightboxImage');
	var objLoadingImage = $('loadingImage');
	var objLightboxDetails = $('lightboxDetails');

	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();
	
	//get the original value of the vertical scroll
	origScroll = arrayPageScroll[1]; 	

	// center loadingImage if it exists
	if (objLoadingImage) {
		objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
		objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
		objLoadingImage.style.display = 'block';
	}

	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';

	// preload image
	imgPreload = new Image();

	imgPreload.onload=function(){
		objImage.src = objLink.href;

		// center lightbox and make sure that the top and left values are not negative
		// and the image placed outside the viewport
		var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2);
		var lightboxLeft = (arrayPageSize[0] - 20 - imgPreload.width) / 2;	
		
		objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
		objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";

		objLightboxDetails.style.width = imgPreload.width + 'px';
		
		if(objLink.getAttribute('title')){
			objCaption.style.display = 'block';
			//objCaption.style.width = imgPreload.width + 'px';
			objCaption.innerHTML = objLink.getAttribute('title');
		} else {
			objCaption.style.display = 'none';
		}
		
		// A small pause between the image loading and displaying is required with IE,
		// this prevents the previous image displaying for a short burst causing flicker.
		if (navigator.appVersion.indexOf("MSIE")!=-1){
			pause(250);
		} 

		if (objLoadingImage) {	objLoadingImage.style.display = 'none'; }

		// Hide select boxes as they will 'peek' through the image in IE
		selects = document.getElementsByTagName("select");
        for (i = 0; i != selects.length; i++) {
                selects[i].style.visibility = "hidden";
        }

	
		objLightbox.style.display = 'block';
		
		
		//JG--embed a link on the lightbox
		if (objLink.href.indexOf("DevelopmentPlan") >= 0){
			objLightbox.onclick = embedLink;
		}
			
		// After image is loaded, update the overlay height as the new image might have
		// increased the overall page height.
		arrayPageSize = getPageSize();
		objOverlay.style.height = (arrayPageSize[1] + 'px');
		
		// Check for 'x' keypress
		listenKey();

		return false;
	}

	imgPreload.src = objLink.href;
	
}

//
// hideLightbox()
//
function hideLightbox()
{
	// get objects
	objOverlay = $('overlay');
	objLightbox = $('lightbox');

	// hide lightbox and overlay
	objOverlay.style.display = 'none';
	objLightbox.style.display = 'none';

	// make select boxes visible
	selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}

	// disable keypress listener
	document.onkeypress = '';

}

//
// initLightbox()
// Function runs on window load, going through link tags looking for rel="lightbox".
// These links receive onclick events that enable the lightbox display for their targets.
// The function also inserts html markup at the top of the page which will be used as a
// container for the overlay pattern and the inline image.
//
function initLightbox()
{
	
	if (!document.getElementsByTagName){ return; }

	// begin area map customization -- Written by JG Mar 2007
	var lBox = $('areaLB')
	lBox.onclick = function() {showLightbox(this); return false;}
	
	/*This set of code is the original lightbox.js; area map customization is below
		var anchors = document.getElementsByTagName("a");	

		// loop through all anchor tags
		for (var i=0; i<anchors.length; i++){
			var anchor = anchors[i];

			if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")){
				anchor.onclick = function () {showLightbox(this); return false;}
			}
	}*/
	
	// the rest of this code inserts html at the top of the page that looks like this:
	//
	// <div id="overlay">
	//		<a href="#" onclick="hideLightbox(); return false;"><img id="loadingImage" /></a>
	//	</div>
	// <div id="lightbox">
	//		<a href="#" onclick="hideLightbox(); return false;" title="Click anywhere to close image">
	//			<img id="closeButton" />		
	//			<img id="lightboxImage" />
	//		</a>
	//		<div id="lightboxDetails">
	//			<div id="lightboxCaption"></div>
	//			<div id="keyboardMsg"></div>
	//		</div>
	// </div>
	
	var objBody = document.getElementsByTagName("body").item(0);
	
	// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
	var objOverlay = document.createElement("div");
	objOverlay.setAttribute('id','overlay');
	objOverlay.onclick = function () {hideLightbox(); return false;}
	objOverlay.style.display = 'none';
	objOverlay.style.position = 'absolute';
	objOverlay.style.top = '0';
	objOverlay.style.left = '0';
	objOverlay.style.zIndex = '90';
 	objOverlay.style.width = '100%';
	objBody.insertBefore(objOverlay, objBody.firstChild);
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	// preload and create loader image
	var imgPreloader = new Image();
	
	// if loader image found, create link to hide lightbox and create loadingimage
	imgPreloader.onload=function(){

		var objLoadingImageLink = document.createElement("a");
		objLoadingImageLink.setAttribute('href','#');
		objLoadingImageLink.onclick = function () {hideLightbox(); return false;}
		objOverlay.appendChild(objLoadingImageLink);
		
		var objLoadingImage = document.createElement("img");
		objLoadingImage.src = loadingImage;
		objLoadingImage.setAttribute('id','loadingImage');
		objLoadingImage.style.position = 'absolute';
		objLoadingImage.style.zIndex = '150';
		objLoadingImageLink.appendChild(objLoadingImage);

		imgPreloader.onload=function(){};	//	clear onLoad, as IE will flip out w/animated gifs

		return false;
	}

	imgPreloader.src = loadingImage;

	// create lightbox div, same note about styles as above
	var objLightbox = document.createElement("div");
	objLightbox.setAttribute('id','lightbox');
	objLightbox.style.display = 'none';
	objLightbox.style.position = 'absolute';
	objLightbox.style.zIndex = '100';	
	objBody.insertBefore(objLightbox, objOverlay.nextSibling);
	
	// create link
	var objAnchor = document.createElement("a");
	objAnchor.setAttribute('href','#');
	objAnchor.setAttribute('title','');
	objAnchor.onclick = function () {hideLightbox(); return false;}
	objLightbox.appendChild(objAnchor);

	// preload and create close button image
	var imgPreloadCloseButton = new Image();

	// if close button image found, 
	imgPreloadCloseButton.onload=function(){

		var objCloseButton = document.createElement("img");
		objCloseButton.src = closeButton;
		objCloseButton.setAttribute('id','closeButton');
		objCloseButton.style.position = 'absolute';
		objCloseButton.style.zIndex = '200';
		objAnchor.appendChild(objCloseButton);

		return false;
	}

	imgPreloadCloseButton.src = closeButton;

	// create image
	var objImage = document.createElement("img");
	objImage.setAttribute('id','lightboxImage');
	objAnchor.appendChild(objImage);
	
	// create details div, a container for the caption and keyboard message
	var objLightboxDetails = document.createElement("div");
	objLightboxDetails.setAttribute('id','lightboxDetails');
	objLightbox.appendChild(objLightboxDetails);

	// create caption
	var objCaption = document.createElement("div");
	objCaption.setAttribute('id','lightboxCaption');
	objCaption.style.display = 'none';
	objLightboxDetails.appendChild(objCaption);

	// create keyboard message
	var objKeyboardMsg = document.createElement("div");
	objKeyboardMsg.setAttribute('id','keyboardMsg');
	objKeyboardMsg.innerHTML = 'press <a href="#" onclick="hideLightbox(); return false;"><kbd>x</kbd></a> to close';
	objLightboxDetails.appendChild(objKeyboardMsg);

}


//JG -- This embeds the link to the development plan file
function embedLink(evt){
	var e = (window.event) ? window.event : evt;
    var xClick = e.clientX;
    var yClick = e.clientY;
    
    var arrayPageSize = getPageSize();
    var offsetTop = (arrayPageSize[3] - 35 - imgPreload.height) / 2;
	var offsetLeft = (arrayPageSize[0] - 20 - imgPreload.width) / 2;
	
	//if lightbox is opened, then user scrolls, then clicks, this logic handles the top offset accordingly
	//origScroll was the original scroll amount;
	var arrayPageScroll = getPageScroll();
	if (origScroll != arrayPageScroll[1] )
		yClick = yClick + arrayPageScroll[1];

	embedLightboxAreaMap(xClick,yClick,objLink.href, offsetTop, offsetLeft);
}

//Written by JG -- Embeds an area map hyperlink into the lightbox overlay image, to access the development plan
function embedLightboxAreaMap(xClick,yClick,srcImg, offsetY, offsetX)
{

	var yCoord = yClick - offsetY;
	var xCoord = xClick - offsetX;
	var yMin = 500;	//This is the relative y coordinate of the hyperlink;as YMax, XMin, and XMax, relative to lightbox window
	var yMax =600;
	var xMin = 65;
	var xMax = 175;

	if (xCoord >= xMin && xCoord <= xMax && yCoord >= yMin && yCoord <= yMax){
		if (srcImg.indexOf("Hourly") >= 0){
			if (srcImg.indexOf("Ext") <= 0)
				window.location = "http://wownet.tandk.com/sites/wow/Lists/Associate%20Development%20Plan/NewForm.aspx";
		}
		else
			window.location = "https://applepm.trabonsolutions.com/";
	}
}