// -----------------------------------------------------------------------------------
//
//	Lightbox v2.04
//	by Lokesh Dhakar - http://www.lokeshdhakar.com
//	Last Modification: 2/9/08
//
//	For more information, visit:
//	http://lokeshdhakar.com/projects/lightbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//  	- Free for use in both personal and commercial projects
//		- Attribution requires leaving author name, author link, and the license info intact.
//	
//  Thanks: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), and Thomas Fuchs(mir.aculo.us) for ideas, libs, and snippets.
//  		Artemy Tregubenko (arty.name) for cleanup and help in updating to latest ver of proto-aculous.
//
// -----------------------------------------------------------------------------------
/*

    Table of Contents
    -----------------
    Configuration

    Lightbox Class Declaration
    - initialize()
    - updateImageList()
    - start()
    - changeImage()
    - resizeImageContainer()
    - showImage()
    - updateDetails()
    - updateNav()
    - enableKeyboardNav()
    - disableKeyboardNav()
    - keyboardAction()
    - preloadNeighborImages()
    - end()
    
    Function Calls
    - document.observe()
   
*/

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

//
//  Configurationl
//
LightboxOptions = Object.extend( {fileLoadingImage:        "http://www.casacurteasigradina.ro/images/loading.gif",     
    fileBottomNavCloseImage: "http://www.casacurteasigradina.ro/images/closelabel.gif",

    overlayOpacity: 0.8,   // controls transparency of shadow overlay

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

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

	// When grouping images this is used to write: Image # of #.
	// Change it for non-english localization
	labelImage: "Image",
	labelOf: "of"}

, window.LightboxOptions || {}

);
// -----------------------------------------------------------------------------------

var Lightbox = Class.create();
Lightbox.prototype = {imageArray: [],
    activeImage: undefined,
    
    // 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();
this.keyboardAction = this.keyboardAction.bindAsEventListener(this);
if (LightboxOptions.resizeSpeed > 10) LightboxOptions.resizeSpeed = 10;
if (LightboxOptions.resizeSpeed < 1)  LightboxOptions.resizeSpeed = 1;
this.resizeDuration = LightboxOptions.animate ? ((11 - LightboxOptions.resizeSpeed) * 0.15) : 0;
this.overlayDuration = LightboxOptions.animate ? 0.2 : 0;
// shadow fade in/out duration

        // 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.
        var size = (LightboxOptions.animate ? 250 : 1) + 'px';
// 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 = $$('body')[0];
objBody.appendChild(Builder.node('div',{id:'overlay'}

));
objBody.appendChild(Builder.node('div', {id:'lightbox'}

, [
            Builder.node('div', {id:'outerImageContainer'}

, 
                Builder.node('div', {id:'imageContainer'}

, [
                    Builder.node('img', {id:'lightboxImage'}

), 
                    Builder.node('div', {id:'hoverNav'}

, [
                        Builder.node('a', {id:'prevLink', href: '#'}

),
                        Builder.node('a', {id:'nextLink', href: '#'}

)
                    ]),
                    Builder.node('div', {id:'loading'}

, 
                        Builder.node('a', {id:'loadingLink', href: '#'}

, 
                            Builder.node('img', {src: LightboxOptions.fileLoadingImage}

)
                        )
                    )
                ])
            ),
            Builder.node('div', {id:'imageDataContainer'}

,
                Builder.node('div', {id:'imageData'}

, [
                    Builder.node('div', {id:'imageDetails'}

, [
                        Builder.node('span', {id:'caption'}

),
                        Builder.node('span', {id:'numberDisplay'}

)
                    ]),
                    Builder.node('div', {id:'bottomNav'}

,
                        Builder.node('a', {id:'bottomNavClose', href: '#'}

,
                            Builder.node('img', {src: LightboxOptions.fileBottomNavCloseImage}

)
                        )
                    )
                ])
            )
        ]));
$('overlay').hide().observe('click', (function() {this.end();}

).bind(this));
$('lightbox').hide().observe('click', (function(event) {if (event.element().id == 'lightbox') this.end();}

).bind(this));
$('outerImageContainer').setStyle( {width: size, height: size}

);
$('prevLink').observe('click', (function(event) {event.stop();
this.changeImage(this.activeImage - 1);}

).bindAsEventListener(this));
$('nextLink').observe('click', (function(event) {event.stop();
this.changeImage(this.activeImage + 1);}

).bindAsEventListener(this));
$('loadingLink').observe('click', (function(event) {event.stop();
this.end();}

).bind(this));
$('bottomNavClose').observe('click', (function(event) {event.stop();
this.end();}

).bind(this));
var th = this;
(function() {var ids = 
                'overlay lightbox outerImageContainer imageContainer lightboxImage hoverNav prevLink nextLink loading loadingLink ' + 
                'imageDataContainer imageData imageDetails caption numberDisplay bottomNav bottomNavClose';
$w(ids).each(function(id){ th[id] = $(id);}

);
        }

).defer();
    }

,

    //
    // 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() {this.updateImageList = Prototype.emptyFunction;
document.observe('click', (function(event){
            var target = event.findElement('a[rel^=lightbox]') || event.findElement('area[rel^=lightbox]');
if (target) {
                event.stop();
this.start(target);}

}

).bind(this));
    }

,
    
    //
    //  start()
    //  Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
    //
    start: function(imageLink) {$$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'hidden'}

);
// stretch overlay to fill page and fade in
        var arrayPageSize = this.getPageSize();
$('overlay').setStyle( {width: arrayPageSize[0] + 'px', height: arrayPageSize[1] + 'px'}

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

);
this.imageArray = [];
var imageNum = 0;
if ((imageLink.rel == 'lightbox')) {// if image is NOT part of a set, add single image to imageArray
            this.imageArray.push([imageLink.href, imageLink.title]);}

else {// if image is part of a set..
            this.imageArray = 
                $$(imageLink.tagName + '[href][rel="' + imageLink.rel + '"]').
                collect(function(anchor){ return [anchor.href, anchor.title];}

).
                uniq();
while (this.imageArray[imageNum][0] != imageLink.href) {imageNum++;}

}

// calculate top and left offset for the lightbox 
        var arrayPageScroll = document.viewport.getScrollOffsets();
var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);
var lightboxLeft = arrayPageScroll[0];
this.lightbox.setStyle( {top: lightboxTop + 'px', left: lightboxLeft + 'px'}

).show();
        
        this.changeImage(imageNum);
    }

,

    //
    //  changeImage()
    //  Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(imageNum) {this.activeImage = imageNum;
// update global var

        // hide elements during transition
        if (LightboxOptions.animate) this.loading.show();
this.lightboxImage.hide();
this.hoverNav.hide();
this.prevLink.hide();
this.nextLink.hide();
// HACK: Opera9 does not currently support scriptaculous opacity and appear fx
        this.imageDataContainer.setStyle({opacity: .0001}

);
this.numberDisplay.hide();
var imgPreloader = new Image();
// once image is preloaded, resize image container


        imgPreloader.onload = (function() {this.lightboxImage.src = this.imageArray[this.activeImage][0];
this.resizeImageContainer(imgPreloader.width, imgPreloader.height);}

).bind(this);
        imgPreloader.src = this.imageArray[this.activeImage][0];
    }

,

    //
    //  resizeImageContainer()
    //
    resizeImageContainer: function(imgWidth, imgHeight) {// get current width and height
        var widthCurrent  = this.outerImageContainer.getWidth();
var heightCurrent = this.outerImageContainer.getHeight();
// get new width and height
        var widthNew  = (imgWidth  + LightboxOptions.borderSize * 2);
var heightNew = (imgHeight + LightboxOptions.borderSize * 2);
// scalars based on change from old to new
        var xScale = (widthNew  / widthCurrent)  * 100;
var yScale = (heightNew / heightCurrent) * 100;
// calculate size difference between new and old image, and resize if necessary
        var wDiff = widthCurrent - widthNew;
var hDiff = heightCurrent - heightNew;
if (hDiff != 0) new Effect.Scale(this.outerImageContainer, yScale, {scaleX: false, duration: this.resizeDuration, queue: 'front'}

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

);
// if new and old image are same size and no scaling transition is necessary, 
        // do a quick pause to prevent image flicker.
        var timeout = 0;
if ((hDiff == 0) && (wDiff == 0)) {timeout = 100;
if (Prototype.Browser.IE) timeout = 250;}

(function() {this.prevLink.setStyle({ height: imgHeight + 'px'}

);
this.nextLink.setStyle( {height: imgHeight + 'px'}

);
this.imageDataContainer.setStyle( {width: widthNew + 'px'}

);

            this.showImage();
        }

).bind(this).delay(timeout / 1000);
    }

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

).bind(this) 
        }

);
        this.preloadNeighborImages();
    }

,

    //
    //  updateDetails()
    //  Display caption, image number, and bottom nav.
    //
    updateDetails: function() {// if caption is not null
        if (this.imageArray[this.activeImage][1] != ""){
            this.caption.update(this.imageArray[this.activeImage][1]).show();}

// if image is part of set display 'Image x of x' 
        if (this.imageArray.length > 1) {this.numberDisplay.update( LightboxOptions.labelImage + ' ' + (this.activeImage + 1) + ' ' + LightboxOptions.labelOf + '  ' + this.imageArray.length).show();}

new Effect.Parallel(
            [ 
                new Effect.SlideDown(this.imageDataContainer, {sync: true, duration: this.resizeDuration, from: 0.0, to: 1.0}

), 
                new Effect.Appear(this.imageDataContainer, {sync: true, duration: this.resizeDuration}

) 
            ], {duration: this.resizeDuration, 
                afterFinish: (function() {
	                // update overlay size and update nav
	                var arrayPageSize = this.getPageSize();
this.overlay.setStyle({ height: arrayPageSize[1] + 'px'}

);
	                this.updateNav();
                }

).bind(this)
            }

);
    }

,

    //
    //  updateNav()
    //  Display appropriate previous and next hover navigation.
    //
    updateNav: function() {this.hoverNav.show();
// if not first image in set, display prev image button
        if (this.activeImage > 0) this.prevLink.show();
// if not last image in set, display next image button
        if (this.activeImage < (this.imageArray.length - 1)) this.nextLink.show();
this.enableKeyboardNav();}

,

    //
    //  enableKeyboardNav()
    //
    enableKeyboardNav: function() {document.observe('keydown', this.keyboardAction);}

,

    //
    //  disableKeyboardNav()
    //
    disableKeyboardNav: function() {document.stopObserving('keydown', this.keyboardAction);}

,

    //
    //  keyboardAction()
    //
    keyboardAction: function(event) {var keycode = event.keyCode;
var escapeKey;
if (event.DOM_VK_ESCAPE) {  // mozilla
            escapeKey = event.DOM_VK_ESCAPE;}

else {// ie
            escapeKey = 27;}

var key = String.fromCharCode(keycode).toLowerCase();
if (key.match(/x|o|c/) || (keycode == escapeKey)) {// close lightbox
            this.end();}

else if ((key == 'p') || (keycode == 37)) {// display previous image
            if (this.activeImage != 0){
                this.disableKeyboardNav();
this.changeImage(this.activeImage - 1);}

}

else if ((key == 'n') || (keycode == 39)) {// display next image
            if (this.activeImage != (this.imageArray.length - 1)){
                this.disableKeyboardNav();
this.changeImage(this.activeImage + 1);}

}

}

,

    //
    //  preloadNeighborImages()
    //  Preload previous and next images.
    //
    preloadNeighborImages: function() {var preloadNextImage, preloadPrevImage;
if (this.imageArray.length > this.activeImage + 1){
            preloadNextImage = new Image();
preloadNextImage.src = this.imageArray[this.activeImage + 1][0];}

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

}

,

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

);
$$('select', 'object', 'embed').each(function(node) {node.style.visibility = 'visible'}

);
    }

,

    //
    //  getPageSize()
    //
    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;}

return [pageWidth,pageHeight];
	}

}

document.observe('dom:loaded', function () {new Lightbox();}

);