// -----------------------------------------------------------------------------------
//
//	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.yetre.com/yetre/IMG/loading_1.gif',     
    fileBottomNavCloseImage: 'http://www.yetre.com/yetre/IMG/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 
            
            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
    setImageTableau(imageNum);
    // 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();show("galerie_"+position);document.getElementById("menu_galerie").innerHTML = document.getElementById("galerie_menu_"+position).innerHTML;document.getElementById("info_tableau").innerHTML = document.getElementById("galerie_info_"+position).innerHTML;fillup() });