LightboxOptions = Object.extend({ fileLoadingImage: 'images/loading.gif', fileBottomNavCloseImage: 'images/closelabel.gif', overlayOpacity: 0.8, animate: true, resizeSpeed: 7, borderSize: 10, labelImage: "Billede", labelOf: "af"
}, window.LightboxOptions || {}); var Lightbox = Class.create(); Lightbox.prototype = { imageArray: [], activeImage: undefined, 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; var size = (LightboxOptions.animate ? 250 : 1) + 'px'; 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: 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: function(imageLink) { $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'hidden' }); 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')){ this.imageArray.push([imageLink.href, imageLink.title]);} else { 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++;}
}
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: function(imageNum) { this.activeImage = imageNum; if (LightboxOptions.animate) this.loading.show(); this.lightboxImage.hide(); this.hoverNav.hide(); this.prevLink.hide(); this.nextLink.hide(); this.imageDataContainer.setStyle({opacity: .0001}); this.numberDisplay.hide(); var imgPreloader = new Image(); 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: function(imgWidth, imgHeight) { var widthCurrent = this.outerImageContainer.getWidth(); var heightCurrent = this.outerImageContainer.getHeight(); var widthNew = (imgWidth + LightboxOptions.borderSize * 2); var heightNew = (imgHeight + LightboxOptions.borderSize * 2); var xScale = (widthNew / widthCurrent) * 100; var yScale = (heightNew / heightCurrent) * 100; 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}); 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: function(){ this.loading.hide(); new Effect.Appear(this.lightboxImage, { duration: this.resizeDuration, queue: 'end', afterFinish: (function(){ this.updateDetails();}).bind(this)
}); this.preloadNeighborImages();}, updateDetails: function() { if (this.imageArray[this.activeImage][1] != ""){ this.caption.update(this.imageArray[this.activeImage][1]).show();}
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() { var arrayPageSize = this.getPageSize(); this.overlay.setStyle({ height: arrayPageSize[1] + 'px' }); this.updateNav();}).bind(this)
} );}, updateNav: function() { this.hoverNav.show(); if (this.activeImage > 0) this.prevLink.show(); if (this.activeImage < (this.imageArray.length - 1)) this.nextLink.show(); this.enableKeyboardNav();}, enableKeyboardNav: function() { document.observe('keydown', this.keyboardAction);}, disableKeyboardNav: function() { document.stopObserving('keydown', this.keyboardAction);}, keyboardAction: function(event) { var keycode = event.keyCode; var escapeKey; if (event.DOM_VK_ESCAPE) { escapeKey = event.DOM_VK_ESCAPE;} else { escapeKey = 27;}
var key = String.fromCharCode(keycode).toLowerCase(); if (key.match(/x|o|c/) || (keycode == escapeKey)){ this.end();} else if ((key == 'p') || (keycode == 37)){ if (this.activeImage != 0){ this.disableKeyboardNav(); this.changeImage(this.activeImage - 1);}
} else if ((key == 'n') || (keycode == 39)){ if (this.activeImage != (this.imageArray.length - 1)){ this.disableKeyboardNav(); this.changeImage(this.activeImage + 1);}
}
}, 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: 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: 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){ xScroll = document.body.scrollWidth; yScroll = document.body.scrollHeight;} else { xScroll = document.body.offsetWidth; yScroll = document.body.offsetHeight;}
var windowWidth, windowHeight; if (self.innerHeight) { if(document.documentElement.clientWidth){ windowWidth = document.documentElement.clientWidth;} else { windowWidth = self.innerWidth;}
windowHeight = self.innerHeight;} else if (document.documentElement && document.documentElement.clientHeight) { windowWidth = document.documentElement.clientWidth; windowHeight = document.documentElement.clientHeight;} else if (document.body) { windowWidth = document.body.clientWidth; windowHeight = document.body.clientHeight;}
if(yScroll < windowHeight){ pageHeight = windowHeight;} else { pageHeight = yScroll;}
if(xScroll < windowWidth){ pageWidth = xScroll;} else { pageWidth = windowWidth;}
return [pageWidth,pageHeight];}
}
document.observe('dom:loaded', function () { new Lightbox();});