/**
* jQuery Lightbox
* Version 0.5 - 11/29/2007
* @author Warren Krewenki
*
* This package is distributed under the BSD license.
* For full license information, see LICENSE.TXT
*
* Based on Lightbox 2 by Lokesh Dhakar (http://www.huddletogether.com/projects/lightbox2/)
* Originally written to make use of the Prototype framework, and Script.acalo.us, now altered to use jQuery.
*
*
**/
 
(function($){
 
$.fn.lightbox = function(options){
// build main options
var opts = $.extend({}, $.fn.lightbox.defaults, options);
        
return this.each(function(){
$(this).click(function(){
     // initalize the lightbox
     initialize();
start(this);
return false;
});
});
 
/**
* initalize()
*
* @return void
* @author Warren Krewenki
*/
 
function initialize() {
$('#overlay').remove();
$('#lightbox').remove();
opts.inprogress = false;
 
// if jsonData, build the imageArray from data provided in JSON format
            if(opts.jsonData && opts.jsonData.length > 0) {
                var parser = opts.jsonDataParser ? opts.jsonDataParser : $.fn.lightbox.parseJsonData;
                opts.imageArray = [];
                opts.imageArray = parser(opts.jsonData);
}
 
var outerImage = '<div id="outerImageContainer"><div id="imageContainer"><iframe id="lightboxIframe" /><img id="lightboxImage"><div id="hoverNav"><a href="javascript://" title="' + opts.strings.prevLinkTitle + '" id="prevLink"></a><a href="javascript://" id="nextLink" title="' + opts.strings.nextLinkTitle + '"></a></div><div id="loading"><a href="javascript://" id="loadingLink"><img src="'+opts.fileLoadingImage+'"></a></div></div></div>';
var imageData = '<div id="imageDataContainer" class="clearfix"><div id="imageData"><div id="imageDetails"><span id="caption"></span><span id="numberDisplay"></span></div><div id="bottomNav">';
 
if (opts.displayHelp)
imageData += '<span id="helpDisplay">' + opts.strings.help + '</span>';
 
imageData += '<a href="javascript://" id="bottomNavClose" title="' + opts.strings.closeTitle + '"><img src="'+opts.fileBottomNavCloseImage+'"></a></div></div></div>';
 
var string;
 
if (opts.navbarOnTop) {
string = '<div id="overlay"></div><div id="lightbox">' + imageData + outerImage + '</div>';
$("body").append(string);
$("#imageDataContainer").addClass('ontop');
} else {
string = '<div id="overlay"></div><div id="lightbox">' + outerImage + imageData + '</div>';
$("body").append(string);
}
 
$("#overlay").click(function(){ end(); }).hide();
$("#lightbox").click(function(){ end();}).hide();
$("#loadingLink").click(function(){ end(); return false;});
$("#bottomNavClose").click(function(){ end(); return false; });
$('#outerImageContainer').width(opts.widthCurrent).height(opts.heightCurrent);
$('#imageDataContainer').width(opts.widthCurrent);
 
if (!opts.imageClickClose) {
         $("#lightboxImage").click(function(){ return false; });
         $("#hoverNav").click(function(){ return false; });
}
};
 
function getPageSize() {
var jqueryPageSize = new Array($(document).width(),$(document).height(), $(window).width(), $(window).height());
return jqueryPageSize;
};
 
function getPageScroll() {
var xScroll, yScroll;
 
if (self.pageYOffset) {
yScroll = self.pageYOffset;
xScroll = self.pageXOffset;
} else if (document.documentElement && document.documentElement.scrollTop){ // Explorer 6 Strict
yScroll = document.documentElement.scrollTop;
xScroll = document.documentElement.scrollLeft;
} else if (document.body) {// all other Explorers
yScroll = document.body.scrollTop;
xScroll = document.body.scrollLeft;
}
 
var arrayPageScroll = new Array(xScroll,yScroll);
return arrayPageScroll;
};
 
function pause(ms) {
var date = new Date();
var curDate = null;
do{curDate = new Date();}
while(curDate - date < ms);
};
 
function start(imageLink) {
$("select, embed, object").hide();
var arrayPageSize = getPageSize();
$("#overlay").hide().css({width: '100%', height: arrayPageSize[1]+'px', opacity : opts.overlayOpacity}).fadeIn();
imageNum = 0;
 
// if data is not provided by jsonData parameter
            if(!opts.jsonData) {
                opts.imageArray = [];
// if image is NOT part of a set..
if(!imageLink.rel || (imageLink.rel == '')){
// add single image to Lightbox.imageArray
opts.imageArray.push(new Array(imageLink.href, opts.displayTitle ? imageLink.title : ''));
} else {
// if image is part of a set..
$("a").each(function(){
if(this.href && (this.rel == imageLink.rel)){
opts.imageArray.push(new Array(this.href, opts.displayTitle ? this.title : ''));
}
});
}
}
 
if(opts.imageArray.length > 1) {
for(i = 0; i < opts.imageArray.length; i++){
for(j = opts.imageArray.length-1; j>i; j--){
if(opts.imageArray[i][0] == opts.imageArray[j][0]){
opts.imageArray.splice(j,1);
}
}
}
while(opts.imageArray[imageNum][0] != imageLink.href) { imageNum++;}
}
 
// calculate top and left offset for the lightbox
var arrayPageScroll = getPageScroll();
var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
var lightboxLeft = arrayPageScroll[0];
$('#lightbox').css({top: lightboxTop+'px', left: lightboxLeft+'px'}).show();
 
 
if (!opts.slideNavBar)
$('#imageData').hide();
 
changeImage(imageNum);
};
 
function changeImage(imageNum) {
if(opts.inprogress == false){
opts.inprogress = true;
opts.activeImage = imageNum; // update global var
 
// hide elements during transition
$('#loading').show();
$('#lightboxImage').hide();
$('#hoverNav').hide();
$('#prevLink').hide();
$('#nextLink').hide();
 
if (opts.slideNavBar) { // delay preloading image until navbar will slide up
// $('#imageDataContainer').slideUp(opts.navBarSlideSpeed, $.fn.doChangeImage);
$('#imageDataContainer').hide();
$('#imageData').hide();
doChangeImage();
} else {
doChangeImage();
}
}
};
 
function doChangeImage() {
 
imgPreloader = new Image();
 
// once image is preloaded, resize image container
imgPreloader.onload=function(){
var newWidth = imgPreloader.width;
var newHeight = imgPreloader.height;
 
 
if (opts.fitToScreen) {
var arrayPageSize = getPageSize();
var ratio;
var initialPageWidth = arrayPageSize[2] - 2 * opts.borderSize;
var initialPageHeight = arrayPageSize[3] - 200;
 
var dI = initialPageWidth/initialPageHeight;
var dP = imgPreloader.width/imgPreloader.height;
 
if((imgPreloader.height > initialPageHeight) || (imgPreloader.width > initialPageWidth)){
if(dI > dP){
newWidth = parseInt((initialPageHeight/imgPreloader.height) * imgPreloader.width);
newHeight = initialPageHeight;
} else {
newHeight = parseInt((initialPageWidth/imgPreloader.width) * imgPreloader.height);
newWidth = initialPageWidth;
}
}
}
 
$('#lightboxImage').attr('src', opts.imageArray[opts.activeImage][0])
.width(newWidth).height(newHeight);
resizeImageContainer(newWidth, newHeight);
};
 
imgPreloader.src = opts.imageArray[opts.activeImage][0];
};
 
function end() {
disableKeyboardNav();
$('#lightbox').hide();
$('#overlay').fadeOut();
$('select, object, embed').show();
};
 
function preloadNeighborImages(){
if(opts.loopImages && opts.imageArray.length > 1) {
preloadNextImage = new Image();
preloadNextImage.src = opts.imageArray[(opts.activeImage == (opts.imageArray.length - 1)) ? 0 : opts.activeImage + 1][0]
 
preloadPrevImage = new Image();
preloadPrevImage.src = opts.imageArray[(opts.activeImage == 0) ? (opts.imageArray.length - 1) : opts.activeImage - 1][0]
} else {
if((opts.imageArray.length - 1) > opts.activeImage){
preloadNextImage = new Image();
preloadNextImage.src = opts.imageArray[opts.activeImage + 1][0];
}
if(opts.activeImage > 0){
preloadPrevImage = new Image();
preloadPrevImage.src = opts.imageArray[opts.activeImage - 1][0];
}
}
};
 
function resizeImageContainer(imgWidth, imgHeight) {
// get current width and height
opts.widthCurrent = $("#outerImageContainer").outerWidth();
opts.heightCurrent = $("#outerImageContainer").outerHeight();
            
// get new width and height
var widthNew = Math.max(350, imgWidth + (opts.borderSize * 2));
var heightNew = (imgHeight + (opts.borderSize * 2));
 
// scalars based on change from old to new
opts.xScale = ( widthNew / opts.widthCurrent) * 100;
opts.yScale = ( heightNew / opts.heightCurrent) * 100;
 
// calculate size difference between new and old image, and resize if necessary
wDiff = opts.widthCurrent - widthNew;
hDiff = opts.heightCurrent - heightNew;
 
$('#imageDataContainer').animate({width: widthNew},opts.resizeSpeed,'linear');
$('#outerImageContainer').animate({width: widthNew},opts.resizeSpeed,'linear',function(){
$('#outerImageContainer').animate({height: heightNew},opts.resizeSpeed,'linear',function(){
showImage();
});
});
 
// if new and old image are same size and no scaling transition is necessary,
// do a quick pause to prevent image flicker.
if((hDiff == 0) && (wDiff == 0)){
if (jQuery.browser.msie){ pause(250); } else { pause(100);}
}
 
$('#prevLink').height(imgHeight);
$('#nextLink').height(imgHeight);
};
 
function showImage() {
$('#loading').hide();
$('#lightboxImage').fadeIn("fast");
updateDetails();
preloadNeighborImages();
 
opts.inprogress = false;
};
 
function updateDetails() {
 
$('#numberDisplay').html('');
 
if(opts.imageArray[opts.activeImage][1]){
$('#caption').html(opts.imageArray[opts.activeImage][1]).show();
}
 
// if image is part of set display 'Image x of x'
if(opts.imageArray.length > 1){
var nav_html;
 
nav_html = opts.strings.image + (opts.activeImage + 1) + opts.strings.of + opts.imageArray.length;
 
if (!opts.disableNavbarLinks) {
                    // display previous / next text links
                    if ((opts.activeImage) > 0 || opts.loopImages) {
                      nav_html = '<a title="' + opts.strings.prevLinkTitle + '" href="#" id="prevLinkText">' + opts.strings.prevLinkText + "</a>" + nav_html;
                    }
 
                    if (((opts.activeImage + 1) < opts.imageArray.length) || opts.loopImages) {
                      nav_html += '<a title="' + opts.strings.nextLinkTitle + '" href="#" id="nextLinkText">' + opts.strings.nextLinkText + "</a>";
                    }
                }
 
$('#numberDisplay').html(nav_html).show();
}
 
if (opts.slideNavBar) {
$("#imageData").slideDown(opts.navBarSlideSpeed);
} else {
$("#imageData").show();
}
 
var arrayPageSize = getPageSize();
$('#overlay').height(arrayPageSize[1]);
updateNav();
};
 
function updateNav() {
if(opts.imageArray.length > 1){
$('#hoverNav').show();
                
                // if loopImages is true, always show next and prev image buttons
                if(opts.loopImages) {
$('#prevLink,#prevLinkText').show().click(function(){
changeImage((opts.activeImage == 0) ? (opts.imageArray.length - 1) : opts.activeImage - 1); return false;
});
 
$('#nextLink,#nextLinkText').show().click(function(){
changeImage((opts.activeImage == (opts.imageArray.length - 1)) ? 0 : opts.activeImage + 1); return false;
});
 
} else {
// if not first image in set, display prev image button
if(opts.activeImage != 0){
$('#prevLink,#prevLinkText').show().click(function(){
changeImage(opts.activeImage - 1); return false;
});
}
 
// if not last image in set, display next image button
if(opts.activeImage != (opts.imageArray.length - 1)){
$('#nextLink,#nextLinkText').show().click(function(){
 
changeImage(opts.activeImage +1); return false;
});
}
                }
                
enableKeyboardNav();
}
};
 
function keyboardAction(e) {
            var o = e.data.opts
var keycode = e.keyCode;
var escapeKey = 27;
            
var key = String.fromCharCode(keycode).toLowerCase();
            
if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){ // close lightbox
end();
} else if((key == 'p') || (keycode == 37)){ // display previous image
if(o.loopImages) {
disableKeyboardNav();
changeImage((o.activeImage == 0) ? (o.imageArray.length - 1) : o.activeImage - 1);
}
else if(o.activeImage != 0){
disableKeyboardNav();
changeImage(o.activeImage - 1);
}
} else if((key == 'n') || (keycode == 39)){ // display next image
if (opts.loopImages) {
disableKeyboardNav();
changeImage((o.activeImage == (o.imageArray.length - 1)) ? 0 : o.activeImage + 1);
}
else if(o.activeImage != (o.imageArray.length - 1)){
disableKeyboardNav();
changeImage(o.activeImage + 1);
}
}
};
 
function enableKeyboardNav() {
$(document).bind('keydown', {opts: opts}, keyboardAction);
};
 
function disableKeyboardNav() {
$(document).unbind('keydown');
};
 
};
    
    $.fn.lightbox.parseJsonData = function(data) {
        var imageArray = [];
        
        $.each(data, function(){
            imageArray.push(new Array(this.url, this.title));
        });
        
        return imageArray;
    };
 
$.fn.lightbox.defaults = {
fileLoadingImage : 'images/loading.gif',
fileBottomNavCloseImage : 'images/closelabel.gif',
overlayOpacity : 0.8,
borderSize : 10,
imageArray : new Array,
activeImage : null,
inprogress : false,
resizeSpeed : 350,
widthCurrent: 250,
heightCurrent: 250,
xScale : 1,
yScale : 1,
displayTitle: true,
navbarOnTop: false,
slideNavBar: false, // slide nav bar up/down between image resizing transitions
navBarSlideSpeed: 350,
displayHelp: false,
strings : {
help: ' \u2190 / P - previous image\u00a0\u00a0\u00a0\u00a0\u2192 / N - next image\u00a0\u00a0\u00a0\u00a0ESC / X - close image gallery',
prevLinkTitle: 'previous image',
nextLinkTitle: 'next image',
prevLinkText: '&laquo; Previous',
nextLinkText: 'Next &raquo;',
closeTitle: 'close image gallery',
image: 'Image ',
of: ' of '
},
fitToScreen: false, // resize images if they are bigger than window
        disableNavbarLinks: false,
        loopImages: false,
        imageClickClose: true,
        jsonData: null,
        jsonDataParser: null
};
 
})(jQuery);