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/* |
Slimbox v1.22 - The ultimate lightweight Lightbox clone |
by Christophe Beyls (http://www.digitalia.be) - MIT-style license. |
Inspired by the original Lightbox v2 by Lokesh Dhakar. |
*/ |
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var Lightbox = { |
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init: function(options) { |
this.options = Object.extend({ |
resizeDuration: 400, // Duration of height and width resizing (ms) |
initialWidth: 250, // Initial width of the box (px) |
initialHeight: 250, // Initial height of the box (px) |
animateCaption: true // Enable/Disable caption animation |
}, options || {}); |
|
this.anchors = []; |
$A(document.getElementsByTagName('a')).each(function(el){ |
if(el.rel && el.href && el.rel.test('^lightbox', 'i')) { |
el.onclick = this.click.pass(el, this); |
this.anchors.push(el); |
} |
}, this); |
this.eventKeyDown = this.keyboardListener.bindAsEventListener(this); |
this.eventPosition = this.position.bind(this); |
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this.overlay = new Element('div').setProperty('id', 'lbOverlay').injectInside(document.body); |
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this.center = new Element('div').setProperty('id', 'lbCenter').setStyles({width: this.options.initialWidth+'px', height: this.options.initialHeight+'px', marginLeft: '-'+(this.options.initialWidth/2)+'px', display: 'none'}).injectInside(document.body); |
this.image = new Element('div').setProperty('id', 'lbImage').injectInside(this.center); |
this.prevLink = new Element('a').setProperties({id: 'lbPrevLink', href: '#'}).setStyle('display', 'none').injectInside(this.image); |
this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(this.image); |
this.prevLink.onclick = this.previous.bind(this); |
this.nextLink.onclick = this.next.bind(this); |
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this.bottom = new Element('div').setProperty('id', 'lbBottom').setStyle('display', 'none').injectInside(document.body); |
new Element('a').setProperties({id: 'lbCloseLink', href: '#'}).injectInside(this.bottom).onclick = this.overlay.onclick = this.close.bind(this); |
this.caption = new Element('div').setProperty('id', 'lbCaption').injectInside(this.bottom); |
this.number = new Element('div').setProperty('id', 'lbNumber').injectInside(this.bottom); |
new Element('div').setStyle('clear', 'both').injectInside(this.bottom); |
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var nextEffect = this.nextEffect.bind(this); |
this.fx = { |
overlay: this.overlay.effect('opacity', { duration: 500 }).hide(), |
resize: this.center.effects({ duration: this.options.resizeDuration, onComplete: nextEffect }), |
image: this.image.effect('opacity', { duration: 500, onComplete: nextEffect }), |
bottom: this.bottom.effects({ duration: 400, onComplete: nextEffect }) |
}; |
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this.preloadPrev = new Image(); |
this.preloadNext = new Image(); |
}, |
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click: function(link) { |
if(link.rel.length == 8) |
return this.show(link.href, link.title); |
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var j, imageNum, images = []; |
this.anchors.each(function(el){ |
if(el.rel == link.rel) { |
for(j = 0; j < images.length; j++) |
if(images[j][0] == el.href) break; |
if(j == images.length) { |
images.push([el.href, el.title]); |
if(el.href == link.href) imageNum = j; |
} |
} |
}, this); |
return this.open(images, imageNum); |
}, |
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show: function(url, title) { |
return this.open([[url, title]], 0); |
}, |
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open: function(images, imageNum) { |
this.images = images; |
this.position(); |
this.setup(true); |
this.top = Window.getScrollTop() + (Window.getHeight() / 15); |
this.center.setStyles({top: this.top+'px', display: ''}); |
this.fx.overlay.goTo(0.8); |
return this.changeImage(imageNum); |
}, |
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position: function() { |
this.overlay.setStyles({top: Window.getScrollTop()+'px', height: Window.getHeight()+'px'}); |
}, |
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setup: function(open) { |
var elements = $A(document.getElementsByTagName('object')); |
elements.extend(document.getElementsByTagName(window.ActiveXObject ? 'select' : 'embed')); |
elements.each(function(el){ el.style.visibility = open ? 'hidden' : ''; }); |
var fn = open ? 'addEvent' : 'removeEvent'; |
window[fn]('scroll', this.eventPosition)[fn]('resize', this.eventPosition); |
document[fn]('keydown', this.eventKeyDown); |
this.step = 0; |
}, |
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keyboardListener: function(event) { |
switch(event.keyCode) { |
case 27: case 88: case 67: this.close(); break; |
case 37: case 80: this.previous(); break; |
case 39: case 78: this.next(); |
} |
}, |
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previous: function() { |
return this.changeImage(this.activeImage-1); |
}, |
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next: function() { |
return this.changeImage(this.activeImage+1); |
}, |
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changeImage: function(imageNum) { |
if(this.step || (imageNum < 0) || (imageNum >= this.images.length)) return false; |
this.step = 1; |
this.activeImage = imageNum; |
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this.prevLink.style.display = this.nextLink.style.display = 'none'; |
this.bottom.setStyles({opacity: '0', height: '0px', display: 'none'}); |
this.fx.image.hide(); |
this.center.className = 'lbLoading'; |
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this.preload = new Image(); |
this.preload.onload = this.nextEffect.bind(this); |
this.preload.src = this.images[imageNum][0]; |
return false; |
}, |
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nextEffect: function() { |
switch(this.step++) { |
case 1: |
this.center.className = ''; |
this.image.setStyles({backgroundImage: 'url('+this.images[this.activeImage][0]+')', width: this.preload.width+'px'}); |
this.image.style.height = this.prevLink.style.height = this.nextLink.style.height = this.preload.height+'px'; |
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this.caption.setHTML(this.images[this.activeImage][1] || ''); |
this.number.setHTML((this.images.length == 1) ? '' : 'Image '+(this.activeImage+1)+' of '+this.images.length); |
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if(this.activeImage != 0) this.preloadPrev.src = this.images[this.activeImage - 1][0]; |
if(this.activeImage != (this.images.length - 1)) this.preloadNext.src = this.images[this.activeImage + 1][0]; |
if(this.center.clientHeight != this.image.offsetHeight) { |
this.fx.resize.custom({height: [this.center.clientHeight, this.image.offsetHeight]}); |
break; |
} |
this.step++; |
case 2: |
if(this.center.clientWidth != this.image.offsetWidth) { |
this.fx.resize.custom({width: [this.center.clientWidth, this.image.offsetWidth], marginLeft: [-this.center.clientWidth/2, -this.image.offsetWidth/2]}); |
break; |
} |
this.step++; |
case 3: |
this.bottom.setStyles({top: (this.top + this.center.clientHeight)+'px', width: this.image.style.width, marginLeft: this.center.style.marginLeft, display: ''}); |
this.fx.image.custom(0, 1); |
break; |
case 4: |
if(this.options.animateCaption) { |
this.fx.bottom.custom({opacity: [0, 1], height: [0, this.bottom.scrollHeight]}); |
break; |
} |
this.bottom.setStyles({opacity: '1', height: this.bottom.scrollHeight+'px'}); |
case 5: |
if(this.activeImage != 0) this.prevLink.style.display = ''; |
if(this.activeImage != (this.images.length - 1)) this.nextLink.style.display = ''; |
this.step = 0; |
} |
}, |
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close: function() { |
if(this.step < 0) return; |
this.step = -1; |
if(this.preload) { |
this.preload.onload = Class.empty; |
this.preload = null; |
} |
for(var f in this.fx) this.fx[f].clearTimer(); |
this.center.style.display = this.bottom.style.display = 'none'; |
this.fx.overlay.chain(this.setup.pass(false, this)).goTo(0); |
return false; |
} |
}; |
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Window.onDomReady(Lightbox.init.bind(Lightbox)); |