// -----------------------------------------------------------------------------------
//
//	Lightbox v2.03.3
//	by Lokesh Dhakar - http://www.huddletogether.com
//	5/21/06
//
//	For more information on this script, visit:
//	http://huddletogether.com/projects/lightbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//	
//	Credit also due to those who have helped, inspired, and made their code available to the public.
//	Including: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), Thomas Fuchs(mir.aculo.us), and others.
//
//
// -----------------------------------------------------------------------------------
/*

	Table of Contents
	-----------------
	Configuration
	Global Variables

	Extending Built-in Objects	
	- Object.extend(Element)
	- Array.prototype.removeDuplicates()
	- Array.prototype.empty()

	Lightbox Class Declaration
	- initialize()
	- updateImageList()
	- start()
	- changeImage()
	- resizeImageContainer()
	- showImage()
	- updateDetails()
	- updateNav()
	- enableKeyboardNav()
	- disableKeyboardNav()
	- keyboardAction()
	- preloadNeighborImages()
	- end()
	
	Miscellaneous Functions
	- getPageScroll()
	- getPageSize()
	- getKey()
	- listenKey()
	- showSelectBoxes()
	- hideSelectBoxes()
	- showFlash()
	- hideFlash()
	- pause()  
	- initLightbox()
	
	Function Calls
	- addLoadEvent(initLightbox)
	
*/
// -----------------------------------------------------------------------------------

//
//	Configuration
//
var fileLoadingImage = "http://codefabr2.nine.ch/domains/wunschlosgluecklich.ch/uploads/cf_plugins/lightbox/images/loading.gif";
var fileBottomNavCloseImage = "http://codefabr2.nine.ch/domains/wunschlosgluecklich.ch/uploads/cf_plugins/lightbox/images/closelabel.gif";

var overlayOpacity = 0.8;
// controls transparency of shadow overlay

var animate = true;
// toggles resizing animations
var resizeSpeed = 7;
// controls the speed of the image resizing animations (1=slowest and 10=fastest)

var borderSize = 10;
//if you adjust the padding in the CSS, you will need to update this variable

// -----------------------------------------------------------------------------------

//
//	Global Variables
//
var imageArray = new Array;
var activeImage;

if (animate == true) {
    overlayDuration = 0.2;
    // shadow fade in/out duration
    if (resizeSpeed > 10) {
        resizeSpeed = 10;
    }
    if (resizeSpeed < 1) {
        resizeSpeed = 1;
    }
    resizeDuration = (11 - resizeSpeed) * 0.15;
} else {
    overlayDuration = 0;
    resizeDuration = 0;
}

// -----------------------------------------------------------------------------------

//
//	Additional methods for Element added by SU, Couloir
//	- further additions by Lokesh Dhakar (huddletogether.com)
//
Object.extend(Element, {
    getWidth: function(element) {
        element = $(element);
        return element.offsetWidth;
    },
    setWidth: function(element, w) {
        element = $(element);
        element.style.width = w + "px";
    },
    setHeight: function(element, h) {
        element = $(element);
        element.style.height = h + "px";
    },
    setTop: function(element, t) {
        element = $(element);
        element.style.top = t + "px";
    },
    setLeft: function(element, l) {
        element = $(element);
        element.style.left = l + "px";
    },
    setSrc: function(element, src) {
        element = $(element);
        element.src = src;
    },
    setHref: function(element, href) {
        element = $(element);
        element.href = href;
    },
    setInnerHTML: function(element, content) {
        element = $(element);
        element.innerHTML = content;
    }
});

// -----------------------------------------------------------------------------------

//
//	Extending built-in Array object
//	- array.removeDuplicates()
//	- array.empty()
//
Array.prototype.removeDuplicates = function () {
    for (i = 0; i < this.length; i++) {
        for (j = this.length - 1; j > i; j--) {
            if (this[i][0] == this[j][0]) {
                this.splice(j, 1);
            }
        }
    }
}

// -----------------------------------------------------------------------------------

Array.prototype.empty = function () {
    for (i = 0; i <= this.length; i++) {
        this.shift();
    }
}

// -----------------------------------------------------------------------------------

//
//	Lightbox Class Declaration
//	- initialize()
//	- start()
//	- changeImage()
//	- resizeImageContainer()
//	- showImage()
//	- updateDetails()
//	- updateNav()
//	- enableKeyboardNav()
//	- disableKeyboardNav()
//	- keyboardNavAction()
//	- preloadNeighborImages()
//	- end()
//
//	Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
//
var Lightbox = Class.create();

Lightbox.prototype = {

// initialize()
// Constructor runs on completion of the DOM loading. Calls updateImageList and then
// the function inserts html at the bottom of the page which is used to display the shadow
// overlay and the image container.
//
    initialize: function() {

        this.updateImageList();

        // Code inserts html at the bottom of the page that looks similar to this:
        //
        //	<div id="overlay"></div>
        //	<div id="lightbox">
        //		<div id="outerImageContainer">
        //			<div id="imageContainer">
        //				<img id="lightboxImage">
        //				<div style="" id="hoverNav">
        //					<a href="#" id="prevLink"></a>
        //					<a href="#" id="nextLink"></a>
        //				</div>
        //				<div id="loading">
        //					<a href="#" id="loadingLink">
        //						<img src="images/loading.gif">
        //					</a>
        //				</div>
        //			</div>
        //		</div>
        //		<div id="imageDataContainer">
        //			<div id="imageData">
        //				<div id="imageDetails">
        //					<span id="caption"></span>
        //					<span id="numberDisplay"></span>
        //				</div>
        //				<div id="bottomNav">
        //					<a href="#" id="bottomNavClose">
        //						<img src="images/close.gif">
        //					</a>
        //				</div>
        //			</div>
        //		</div>
        //	</div>


        var objBody = document.getElementsByTagName("body").item(0);

        var objOverlay = document.createElement("div");
        objOverlay.setAttribute('id', 'overlay');
        objOverlay.style.display = 'none';
        objOverlay.onclick = function() {
            myLightbox.end();
        }
        objBody.appendChild(objOverlay);

        var objLightbox = document.createElement("div");
        objLightbox.setAttribute('id', 'lightbox');
        objLightbox.style.display = 'none';
        objLightbox.onclick = function(e) {    // close Lightbox is user clicks shadow overlay
            if (!e) var e = window.event;
            var clickObj = Event.element(e).id;
            if (clickObj == 'lightbox') {
                myLightbox.end();
            }
        };
        objBody.appendChild(objLightbox);

        var objOuterImageContainer = document.createElement("div");
        objOuterImageContainer.setAttribute('id', 'outerImageContainer');
        objLightbox.appendChild(objOuterImageContainer);

        // When Lightbox starts it will resize itself from 250 by 250 to the current image dimension.
        // If animations are turned off, it will be hidden as to prevent a flicker of a
        // white 250 by 250 box.
        if (animate) {
            Element.setWidth('outerImageContainer', 250);
            Element.setHeight('outerImageContainer', 250);
        } else {
            Element.setWidth('outerImageContainer', 1);
            Element.setHeight('outerImageContainer', 1);
        }

        var objImageContainer = document.createElement("div");
        objImageContainer.setAttribute('id', 'imageContainer');
        objOuterImageContainer.appendChild(objImageContainer);

        var objLightboxImage = document.createElement("img");
        objLightboxImage.setAttribute('id', 'lightboxImage');
        objImageContainer.appendChild(objLightboxImage);

        var objHoverNav = document.createElement("div");
        objHoverNav.setAttribute('id', 'hoverNav');
        objImageContainer.appendChild(objHoverNav);

        var objPrevLink = document.createElement("a");
        objPrevLink.setAttribute('id', 'prevLink');
        objPrevLink.setAttribute('href', '#');
        objHoverNav.appendChild(objPrevLink);

        var objNextLink = document.createElement("a");
        objNextLink.setAttribute('id', 'nextLink');
        objNextLink.setAttribute('href', '#');
        objHoverNav.appendChild(objNextLink);

        var objLoading = document.createElement("div");
        objLoading.setAttribute('id', 'loading');
        objImageContainer.appendChild(objLoading);

        var objLoadingLink = document.createElement("a");
        objLoadingLink.setAttribute('id', 'loadingLink');
        objLoadingLink.setAttribute('href', '#');
        objLoadingLink.onclick = function() {
            myLightbox.end();
            return false;
        }
        objLoading.appendChild(objLoadingLink);

        var objLoadingImage = document.createElement("img");
        objLoadingImage.setAttribute('src', fileLoadingImage);
        objLoadingLink.appendChild(objLoadingImage);

        var objImageDataContainer = document.createElement("div");
        objImageDataContainer.setAttribute('id', 'imageDataContainer');
        objLightbox.appendChild(objImageDataContainer);

        var objImageData = document.createElement("div");
        objImageData.setAttribute('id', 'imageData');
        objImageDataContainer.appendChild(objImageData);

        var objImageDetails = document.createElement("div");
        objImageDetails.setAttribute('id', 'imageDetails');
        objImageData.appendChild(objImageDetails);

        var objCaption = document.createElement("span");
        objCaption.setAttribute('id', 'caption');
        objImageDetails.appendChild(objCaption);

        var objNumberDisplay = document.createElement("span");
        objNumberDisplay.setAttribute('id', 'numberDisplay');
        objImageDetails.appendChild(objNumberDisplay);

        var objBottomNav = document.createElement("div");
        objBottomNav.setAttribute('id', 'bottomNav');
        objImageData.appendChild(objBottomNav);

        var objBottomNavCloseLink = document.createElement("a");
        objBottomNavCloseLink.setAttribute('id', 'bottomNavClose');
        objBottomNavCloseLink.setAttribute('href', '#');
        objBottomNavCloseLink.onclick = function() {
            myLightbox.end();
            return false;
        }
        objBottomNav.appendChild(objBottomNavCloseLink);

        var objBottomNavCloseImage = document.createElement("img");
        objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
        objBottomNavCloseLink.appendChild(objBottomNavCloseImage);
    },


//
// updateImageList()
// Loops through anchor tags looking for 'lightbox' references and applies onclick
// events to appropriate links. You can rerun after dynamically adding images w/ajax.
//
    updateImageList: function() {
        if (!document.getElementsByTagName) {
            return;
        }
        var anchors = document.getElementsByTagName('a');
        var areas = document.getElementsByTagName('area');

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

            var relAttribute = String(anchor.getAttribute('rel'));

            // use the string.match() method to catch 'lightbox' references in the rel attribute
            if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))) {
                anchor.onclick = function () {
                    myLightbox.start(this);
                    return false;
                }
            }
        }

        // loop through all area tags
        // todo: combine anchor & area tag loops
        for (var i = 0; i < areas.length; i++) {
            var area = areas[i];

            var relAttribute = String(area.getAttribute('rel'));

            // use the string.match() method to catch 'lightbox' references in the rel attribute
            if (area.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))) {
                area.onclick = function () {
                    myLightbox.start(this);
                    return false;
                }
            }
        }
    },


//
//	start()
//	Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
//
    start: function(imageLink) {

        hideSelectBoxes();
        hideFlash();

        // stretch overlay to fill page and fade in
        var arrayPageSize = getPageSize();
        Element.setWidth('overlay', arrayPageSize[0]);
        Element.setHeight('overlay', arrayPageSize[1]);

        new Effect.Appear('overlay', { duration: overlayDuration, from: 0.0, to: overlayOpacity });

        imageArray = [];
        imageNum = 0;

        if (!document.getElementsByTagName) {
            return;
        }
        var anchors = document.getElementsByTagName(imageLink.tagName);

        // if image is NOT part of a set..
        if ((imageLink.getAttribute('rel') == 'lightbox')) {
            // add single image to imageArray
            imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title')));
        } else {
            // if image is part of a set..

            // loop through anchors, find other images in set, and add them to imageArray
            for (var i = 0; i < anchors.length; i++) {
                var anchor = anchors[i];
                if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))) {
                    imageArray.push(new Array(anchor.getAttribute('href'), anchor.getAttribute('title')));
                }
            }
            imageArray.removeDuplicates();
            while (imageArray[imageNum][0] != imageLink.getAttribute('href')) {
                imageNum++;
            }
        }

        // calculate top and left offset for the lightbox
        var arrayPageScroll = getPageScroll();
        var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
        var lightboxLeft = arrayPageScroll[0];
        Element.setTop('lightbox', lightboxTop);
        Element.setLeft('lightbox', lightboxLeft);

        Element.show('lightbox');

        this.changeImage(imageNum);
    },

//
//	changeImage()
//	Hide most elements and preload image in preparation for resizing image container.
//
    changeImage: function(imageNum) {

        activeImage = imageNum;
        // update global var

        // hide elements during transition
        if (animate) {
            Element.show('loading');
        }
        Element.hide('lightboxImage');
        Element.hide('hoverNav');
        Element.hide('prevLink');
        Element.hide('nextLink');
        Element.hide('imageDataContainer');
        Element.hide('numberDisplay');

        imgPreloader = new Image();

        // once image is preloaded, resize image container
        imgPreloader.onload = function() {
            Element.setSrc('lightboxImage', imageArray[activeImage][0]);
            myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);

            imgPreloader.onload = function() {
            };
            //	clear onLoad, IE behaves irratically with animated gifs otherwise
        }
        imgPreloader.src = imageArray[activeImage][0];
    },

//
//	resizeImageContainer()
//
    resizeImageContainer: function(imgWidth, imgHeight) {

        // get curren width and height
        this.widthCurrent = Element.getWidth('outerImageContainer');
        this.heightCurrent = Element.getHeight('outerImageContainer');

        // get new width and height
        var widthNew = (imgWidth + (borderSize * 2));
        var heightNew = (imgHeight + (borderSize * 2));

        // scalars based on change from old to new
        this.xScale = ( widthNew / this.widthCurrent) * 100;
        this.yScale = ( heightNew / this.heightCurrent) * 100;

        // calculate size difference between new and old image, and resize if necessary
        wDiff = this.widthCurrent - widthNew;
        hDiff = this.heightCurrent - heightNew;

        if (!( hDiff == 0)) {
            new Effect.Scale('outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'});
        }
        if (!( wDiff == 0)) {
            new Effect.Scale('outerImageContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration});
        }

        // 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 (navigator.appVersion.indexOf("MSIE") != -1) {
                pause(250);
            } else {
                pause(100);
            }
        }

        Element.setHeight('prevLink', imgHeight);
        Element.setHeight('nextLink', imgHeight);
        Element.setWidth('imageDataContainer', widthNew);

        this.showImage();
    },

//
//	showImage()
//	Display image and begin preloading neighbors.
//
    showImage: function() {
        Element.hide('loading');
        new Effect.Appear('lightboxImage', { duration: resizeDuration, queue: 'end', afterFinish: function() {
            myLightbox.updateDetails();
        } });
        this.preloadNeighborImages();
    },

//
//	updateDetails()
//	Display caption, image number, and bottom nav.
//
    updateDetails: function() {

        // if caption is not null
        if (imageArray[activeImage][1]) {
            Element.show('caption');
            Element.setInnerHTML('caption', imageArray[activeImage][1]);
        }

        // if image is part of set display 'Image x of x'
        if (imageArray.length > 1) {
            Element.show('numberDisplay');
            Element.setInnerHTML('numberDisplay', "Image " + eval(activeImage + 1) + " of " + imageArray.length);
        }

        new Effect.Parallel(
                [ new Effect.SlideDown('imageDataContainer', { sync: true, duration: resizeDuration, from: 0.0, to: 1.0 }),
                        new Effect.Appear('imageDataContainer', { sync: true, duration: resizeDuration }) ],
        { duration: resizeDuration, afterFinish: function() {
            // update overlay size and update nav
            var arrayPageSize = getPageSize();
            Element.setHeight('overlay', arrayPageSize[1]);
            myLightbox.updateNav();
        }
        }
                );
    },

//
//	updateNav()
//	Display appropriate previous and next hover navigation.
//
    updateNav: function() {

        Element.show('hoverNav');

        // if not first image in set, display prev image button
        if (activeImage != 0) {
            Element.show('prevLink');
            document.getElementById('prevLink').onclick = function() {
                myLightbox.changeImage(activeImage - 1);
                return false;
            }
        }

        // if not last image in set, display next image button
        if (activeImage != (imageArray.length - 1)) {
            Element.show('nextLink');
            document.getElementById('nextLink').onclick = function() {
                myLightbox.changeImage(activeImage + 1);
                return false;
            }
        }

        this.enableKeyboardNav();
    },

//
//	enableKeyboardNav()
//
    enableKeyboardNav: function() {
        document.onkeydown = this.keyboardAction;
    },

//
//	disableKeyboardNav()
//
    disableKeyboardNav: function() {
        document.onkeydown = '';
    },

//
//	keyboardAction()
//
    keyboardAction: function(e) {
        if (e == null) { // ie
            keycode = event.keyCode;
            escapeKey = 27;
        } else { // mozilla
            keycode = e.keyCode;
            escapeKey = e.DOM_VK_ESCAPE;
        }

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

        if ((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)) {    // close lightbox
            myLightbox.end();
        } else if ((key == 'p') || (keycode == 37)) {    // display previous image
            if (activeImage != 0) {
                myLightbox.disableKeyboardNav();
                myLightbox.changeImage(activeImage - 1);
            }
        } else if ((key == 'n') || (keycode == 39)) {    // display next image
            if (activeImage != (imageArray.length - 1)) {
                myLightbox.disableKeyboardNav();
                myLightbox.changeImage(activeImage + 1);
            }
        }

    },

//
//	preloadNeighborImages()
//	Preload previous and next images.
//
    preloadNeighborImages: function() {

        if ((imageArray.length - 1) > activeImage) {
            preloadNextImage = new Image();
            preloadNextImage.src = imageArray[activeImage + 1][0];
        }
        if (activeImage > 0) {
            preloadPrevImage = new Image();
            preloadPrevImage.src = imageArray[activeImage - 1][0];
        }

    },

//
//	end()
//
    end: function() {
        this.disableKeyboardNav();
        Element.hide('lightbox');
        new Effect.Fade('overlay', { duration: overlayDuration});
        showSelectBoxes();
        showFlash();
    }
}

// -----------------------------------------------------------------------------------

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.com
//
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;
    }

    arrayPageScroll = new Array(xScroll, yScroll)
    return arrayPageScroll;
}

// -----------------------------------------------------------------------------------

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.com
// Edit for Firefox by pHaez
//
function getPageSize() {

    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;

    //	console.log(self.innerWidth);
    //	console.log(document.documentElement.clientWidth);

    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;
    }

    //	console.log("xScroll " + xScroll)
    //	console.log("windowWidth " + windowWidth)

    // for small pages with total width less then width of the viewport
    if (xScroll < windowWidth) {
        pageWidth = xScroll;
    } else {
        pageWidth = windowWidth;
    }
    //	console.log("pageWidth " + pageWidth)

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

// -----------------------------------------------------------------------------------

//
// 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') {
    }
}

// -----------------------------------------------------------------------------------

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

// ---------------------------------------------------

function showSelectBoxes() {
    var selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
        selects[i].style.visibility = "visible";
    }
}

// ---------------------------------------------------

function hideSelectBoxes() {
    var selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
        selects[i].style.visibility = "hidden";
    }
}

// ---------------------------------------------------

function showFlash() {
    var flashObjects = document.getElementsByTagName("object");
    for (i = 0; i < flashObjects.length; i++) {
        flashObjects[i].style.visibility = "visible";
    }

    var flashEmbeds = document.getElementsByTagName("embed");
    for (i = 0; i < flashEmbeds.length; i++) {
        flashEmbeds[i].style.visibility = "visible";
    }
}

// ---------------------------------------------------

function hideFlash() {
    var flashObjects = document.getElementsByTagName("object");
    for (i = 0; i < flashObjects.length; i++) {
        flashObjects[i].style.visibility = "hidden";
    }

    var flashEmbeds = document.getElementsByTagName("embed");
    for (i = 0; i < flashEmbeds.length; i++) {
        flashEmbeds[i].style.visibility = "hidden";
    }

}


// ---------------------------------------------------

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Help from Ran Bar-On [ran2103@gmail.com]
//

function pause(ms) {
    var date = new Date();
    curDate = null;
    do{
        var curDate = new Date();
    }
    while (curDate - date < ms);
}
/*
function pause(numberMillis) {
	var curently = new Date().getTime() + sender;
	while (new Date().getTime();	
}
*/
// ---------------------------------------------------


function initLightbox() {
    myLightbox = new Lightbox();
}
Event.observe(window, 'load', initLightbox, false);