/**

 * 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

 *

 * Changes by:

 * @author Krzysztof Kotowicz <koto at webworkers dot pl>:

 *  - bugfix: multiple instances of Lightbox galleries allowed

 *    (using opts variable instead of $.fn.lightbox.defaults)

 *  - bugfix: use var for local variables in a few functions

 *  - added support for navbarOnTop setting

 *  - added support for displayTitle setting

 *  - added support for slideNavBar setting (with slideNavBarSpeed)

 *  - added support for displayHelp setting

 *  - added support for fitToScreen setting (ported Lightbox VinDSL hack)

 *    (see http://www.huddletogether.com/forum/comments.php?DiscussionID=307)

 *  - plugin now uses jQuery.width() and jQuery.height()

 *  - removed eval() calls

 *  - removed destroyElement - uses jQuery.remove()

 *  - use of prevLinkText, nextLinkText and help

 *  - all strings are now placed in opts.strings to allow for customization/translation

 *

 * 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($){

    var opts;



    $.fn.lightbox = function(options){

        // build main options

        opts = $.extend({}, $.fn.lightbox.defaults, options);



        // initalize the lightbox

        $.fn.lightbox.initialize();

        return this.each(function(){

            $(this).click(function(){

                $(this).lightbox.start(this);

                return false;

            });

        });

    };



    // lightbox functions

    $.fn.lightbox.initialize = function(){

       
       

        $('#overlay').remove();

        $('#lightbox').remove();

        opts.inprogress = false;

        var outerImage = '<div id="outerImageContainer"><div id="imageContainer"  ><img id="lightboxImageOver" style="position:absolute;left:10px;" ><img id="lightboxImage" class="n" ><div id="hoverNav"></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" style="font-size:16px;"></span></div><div style="float:left; padding-top:3px;"><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(){
            $.fn.lightbox.end();
        }).hide();

        $("#lightbox").click(function(){
            $.fn.lightbox.end();
        }).hide();

        $("#loadingLink").click(function(){
            $.fn.lightbox.end(); return false;
        });

        $("#bottomNavClose").click(function(){
            $.fn.lightbox.end();
            $("#lightboxImageOver").animate({
            opacity: 0
            }, "fast");
            $("#lightboxImage").animate({
            opacity: 1
            }, "fast");
            document.getElementById('lightboxImageOver').style.visiblity = "hidden";
            document.getElementById('imageContainer').onmouseover = null;
            document.getElementById('imageContainer').onmouseout = null;
            mouseove = 0;
            return false; 
        });

        $('#outerImageContainer').width(opts.widthCurrent).height(opts.heightCurrent);

        $('#imageDataContainer').width(opts.widthCurrent);

    };



    $.fn.lightbox.getPageSize = function(){

        var xScroll, yScroll;



        if (window.innerHeight && window.scrollMaxY) {

            xScroll = window.innerWidth + window.scrollMaxX;

            yScroll = window.innerHeight + window.scrollMaxY;

        } else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac

            xScroll = document.body.scrollWidth;

            yScroll = document.body.scrollHeight;

        } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari

            xScroll = document.body.offsetWidth;

            yScroll = document.body.offsetHeight;

        }



        var windowWidth, windowHeight;



        if (self.innerHeight) { // all except Explorer

            if(document.documentElement.clientWidth){

                windowWidth = document.documentElement.clientWidth;

            } else {

                windowWidth = self.innerWidth;

            }

            windowHeight = self.innerHeight;

        } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode

            windowWidth = document.documentElement.clientWidth;

            windowHeight = document.documentElement.clientHeight;

        } else if (document.body) { // other Explorers

            windowWidth = document.body.clientWidth;

            windowHeight = document.body.clientHeight;

        }



        // for small pages with total height less then height of the viewport

        if(yScroll < windowHeight){

            pageHeight = windowHeight;

        } else {

            pageHeight = yScroll;

        }





        // for small pages with total width less then width of the viewport

        if(xScroll < windowWidth){

            pageWidth = xScroll;

        } else {

            pageWidth = windowWidth;

        }



        var arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight);

        return arrayPageSize;

    };





    $.fn.lightbox.getPageScroll = function(){

        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;

    };



    $.fn.lightbox.pause = function(ms){

        var date = new Date();

        var curDate = null;

        do{
            curDate = new Date();
        }

        while( curDate - date < ms);

    };



    $.fn.lightbox.start = function(imageLink){


        
        $("select, embed, object").hide();

        var arrayPageSize = $.fn.lightbox.getPageSize();

        $("#overlay").hide().css({
            width: '100%',
            height: arrayPageSize[1]+'px',
            opacity : opts.overlayOpacity
            }).fadeIn();

        opts.imageArray = [];

        imageNum = 0;



        var anchors = document.getElementsByTagName( imageLink.tagName);



        // 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 : ''));

                }

            });





            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 = $.fn.lightbox.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();


        
        $.fn.lightbox.changeImage(imageNum);



    };


    
    $.fn.lightbox.changeImage = function(imageNum){

         if (document.getElementById('imageContainer'))
        {
            document.getElementById('imageContainer').onmouseover = null;
            document.getElementById('imageContainer').onmouseout = null;
        }

        
        
        if (document.getElementById('lightboxImageOver'))
            document.getElementById('lightboxImageOver').style.visiblity = "hidden";

        
        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();

                $.fn.doChangeImage();

            } else {

                $.fn.doChangeImage();

            }

        }

    };



    $.fn.doChangeImage = function(){



        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 = $.fn.lightbox.getPageSize();

                var ratio;

                var initialPageWidth = arrayPageSize[2] - 2 * opts.borderSize;

                var initialPageHeight = arrayPageSize[3] - 200;



                if (imgPreloader.height > initialPageHeight)

                {

                    newWidth = parseInt((initialPageHeight/imgPreloader.height) * imgPreloader.width);

                    newHeight = initialPageHeight;

                }

                else if (imgPreloader.width > initialPageWidth)

                {

                    newHeight = parseInt((initialPageWidth/imgPreloader.width) * imgPreloader.height);

                    newWidth = initialPageWidth;

                }

            }



            $('#lightboxImage').attr('src', opts.imageArray[opts.activeImage][0])

            .width(newWidth).height(newHeight);

            $.fn.lightbox.resizeImageContainer(newWidth, newHeight);

        };



        imgPreloader.src = opts.imageArray[opts.activeImage][0];
        $('#lightboxImageOver').hide();
        src1 = opts.imageArray[opts.activeImage][0];
        replaceindex = src1.substr(src1.lastIndexOf("."),src1.length);
        newsrc = src1.replace(replaceindex,"_over"+replaceindex);
        tarobjid = document.getElementById('lightboxImageOver');
        tarobjid.src = newsrc;
        
    //
        
    };



    $.fn.lightbox.end = function(){

        $.fn.lightbox.disableKeyboardNav();

        $('#lightbox').hide();

        $('#overlay').fadeOut();

        $('select, object, embed').show();

    };



    $.fn.lightbox.preloadNeighborImages = function(){

        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];

        }

    };



    $.fn.lightbox.keyboardAction = function(e){

        if (e == null) { // ie

            var keycode = event.keyCode;

            var escapeKey = 27;

        } else { // mozilla

            var keycode = e.keyCode;

            var escapeKey = e.DOM_VK_ESCAPE;

        }



        var key = String.fromCharCode(keycode).toLowerCase();



        if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){ // close lightbox

            $.fn.lightbox.end();

        } else if((key == 'p') || (keycode == 37)){ // display previous image

            if(opts.activeImage != 0){

                $.fn.lightbox.disableKeyboardNav();

                $.fn.lightbox.changeImage(opts.activeImage - 1);

            }

        } else if((key == 'n') || (keycode == 39)){ // display next image

            if(opts.activeImage != (opts.imageArray.length - 1)){

                $.fn.lightbox.disableKeyboardNav();

                $.fn.lightbox.changeImage(opts.activeImage + 1);

            }

        }

    };



    $.fn.lightbox.resizeImageContainer = function(imgWidth, imgHeight){

        // get current width and height

        opts.widthCurrent = document.getElementById('outerImageContainer').offsetWidth;

        opts.heightCurrent = document.getElementById('outerImageContainer').offsetHeight;



        // get new width and height

        var widthNew = (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(){

                $.fn.lightbox.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){
                $.fn.lightbox.pause(250);
            } else {
                $.fn.lightbox.pause(100);
            }

        }



        $('#prevLink').height(imgHeight);

        $('#nextLink').height(imgHeight);

    };



    $.fn.lightbox.showImage = function(){

        $('#loading').hide();

        $('#lightboxImage').fadeIn("fast",function(){
            document.getElementById('imageContainer').onmouseover = function(){
            if (!opts.inprogress)
                {
                    mouseove = 1;
                    chimg(true);
                }
            
            
        };
        document.getElementById('imageContainer').onmouseout = function() {
            if ((mouseove == 1) && (!opts.inprogress))
                {
                    chimg(false);
                    
                }

        }
        });

        $.fn.lightbox.updateDetails();

        //$.fn.lightbox.preloadNeighborImages();
        opts.inprogress = false;
        
        

        

    };



    $.fn.lightbox.updateDetails = function(){



        $('#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;*/

            nav_html = opts.strings.image + opts.strings.of ;



            // display previous / next text links

            if ((opts.activeImage) > 0) {

                nav_html = '<a title="' + opts.strings.prevLinkTitle + '" href="#" id="prevLinkText">' + opts.strings.prevLinkText + "</a>" + nav_html;

            }



            if ((opts.activeImage + 1) < opts.imageArray.length) {

                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 = $.fn.lightbox.getPageSize();

        $('#overlay').height(arrayPageSize[1]);

        $.fn.lightbox.updateNav();

    };



    $.fn.lightbox.updateNav = function(){

        if(opts.imageArray.length > 1){

            $('#hoverNav').show();



            // if not first image in set, display prev image button

            if(opts.activeImage != 0){

                $('#prevLink,#prevLinkText').show().click(function(){

                    $.fn.lightbox.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(){



                    $.fn.lightbox.changeImage(opts.activeImage +1); return false;

                });

            }



            $.fn.lightbox.enableKeyboardNav();

        }

    };





    $.fn.lightbox.enableKeyboardNav = function(){

        document.onkeydown = $.fn.lightbox.keyboardAction;

    };



    $.fn.lightbox.disableKeyboardNav = function(){

        document.onkeydown = '';

    };



    $.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:  '',

            nextLinkText:  '',

            closeTitle: 'close image gallery',

            image: '&copy; 2003-2009 Nick Saglimbeni / Slickforce Inc. All rights reserved.',

            of: ' '

        },

        fitToScreen: false		// resize images if they are bigger than window

    };

})(jQuery);