/**



 * 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; 2003-2011 Slickforce Inc. All rights reserved.',



            of: ' '



        },



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



    };



})(jQuery);