LightboxOptions = Object.extend({
fileLoadingImage:'public/js/lightbox/images/loading.gif',
fileBottomNavCloseImage:'public/js/lightbox/images/closelabel.gif',
overlayOpacity:0.8,
animate:true,
resizeSpeed:7,
borderSize:10,
labelImage:"Image",
labelOf:"of"
}, 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 = $$('body')[0];
$('overlay').hide().observe('click', (function() { this.end(); }).bind(this));
$('lightbox').hide().observe('click', (function(event) { if (event.element().id == 'lightbox') this.end(); }).bind(this));
$('outerImageContainer').setStyle({ width:size, height:size });
$('prevLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage - 1); }).bindAsEventListener(this));
$('nextLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage + 1); }).bindAsEventListener(this));
$('loadingLink').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
$('bottomNavClose').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
var th = this;
(function(){
var ids =
'overlay lightbox outerImageContainer imageContainer lightboxImage hoverNav prevLink nextLink loading loadingLink ' +
'imageDataContainer imageData imageDetails caption numberDisplay bottomNav bottomNavClose';
$w(ids).each(function(id){ th[id] = $(id); });
}).defer();
},
updateImageList:function() {
this.updateImageList = Prototype.emptyFunction;
document.observe('click', (function(event){
var target = event.findElement('a[rel^=lightbox]') || event.findElement('area[rel^=lightbox]');
if (target) {
event.stop();
this.start(target);
}
}).bind(this));
},
start:function(imageLink) {
$$('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];
}
}