195 lines
7.0 KiB
JavaScript
195 lines
7.0 KiB
JavaScript
/*
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Slimbox v1.4 - The ultimate lightweight Lightbox clone
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by Christophe Beyls (http://www.digitalia.be) - MIT-style license.
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Inspired by the original Lightbox v2 by Lokesh Dhakar.
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*/
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var Lightbox = {
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init: function(options){
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this.options = $extend({
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resizeDuration: 400,
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resizeTransition: false, // default transition
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initialWidth: 250,
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initialHeight: 250,
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animateCaption: true,
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showCounter: true
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}, options || {});
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this.anchors = [];
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$each(document.links, function(el){
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if (el.rel && el.rel.test(/^lightbox/i)){
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el.onclick = this.click.pass(el, this);
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this.anchors.push(el);
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}
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}, this);
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this.eventKeyDown = this.keyboardListener.bindAsEventListener(this);
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this.eventPosition = this.position.bind(this);
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this.overlay = new Element('div', {'id': 'lbOverlay'}).injectInside(document.body);
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this.center = new Element('div', {'id': 'lbCenter', 'styles': {'width': this.options.initialWidth, 'height': this.options.initialHeight, 'marginLeft': -(this.options.initialWidth/2), 'display': 'none'}}).injectInside(document.body);
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this.image = new Element('div', {'id': 'lbImage'}).injectInside(this.center);
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this.prevLink = new Element('a', {'id': 'lbPrevLink', 'href': '#', 'styles': {'display': 'none'}}).injectInside(this.image);
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this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(this.image);
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this.prevLink.onclick = this.previous.bind(this);
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this.nextLink.onclick = this.next.bind(this);
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this.bottomContainer = new Element('div', {'id': 'lbBottomContainer', 'styles': {'display': 'none'}}).injectInside(document.body);
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this.bottom = new Element('div', {'id': 'lbBottom'}).injectInside(this.bottomContainer);
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new Element('a', {'id': 'lbCloseLink', 'href': '#'}).injectInside(this.bottom).onclick = this.overlay.onclick = this.close.bind(this);
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this.caption = new Element('div', {'id': 'lbCaption'}).injectInside(this.bottom);
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this.number = new Element('div', {'id': 'lbNumber'}).injectInside(this.bottom);
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new Element('div', {'styles': {'clear': 'both'}}).injectInside(this.bottom);
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var nextEffect = this.nextEffect.bind(this);
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this.fx = {
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overlay: this.overlay.effect('opacity', {duration: 500}).hide(),
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resize: this.center.effects($extend({duration: this.options.resizeDuration, onComplete: nextEffect}, this.options.resizeTransition ? {transition: this.options.resizeTransition} : {})),
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image: this.image.effect('opacity', {duration: 500, onComplete: nextEffect}),
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bottom: this.bottom.effect('margin-top', {duration: 400, onComplete: nextEffect})
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};
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this.preloadPrev = new Image();
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this.preloadNext = new Image();
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},
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click: function(link){
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if (link.rel.length == 8) return this.show(link.href, link.title);
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var j, imageNum, images = [];
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this.anchors.each(function(el){
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if (el.rel == link.rel){
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for (j = 0; j < images.length; j++) if(images[j][0] == el.href) break;
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if (j == images.length){
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images.push([el.href, el.title]);
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if (el.href == link.href) imageNum = j;
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}
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}
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}, this);
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return this.open(images, imageNum);
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},
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show: function(url, title){
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return this.open([[url, title]], 0);
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},
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open: function(images, imageNum){
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this.images = images;
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this.position();
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this.setup(true);
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this.top = window.getScrollTop() + (window.getHeight() / 15);
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this.center.setStyles({top: this.top, display: ''});
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this.fx.overlay.start(0.8);
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return this.changeImage(imageNum);
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},
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position: function(){
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this.overlay.setStyles({'top': window.getScrollTop(), 'height': window.getHeight()});
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},
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setup: function(open){
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var elements = $A(document.getElementsByTagName('object'));
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elements.extend(document.getElementsByTagName(window.ie ? 'select' : 'embed'));
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elements.each(function(el){
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if (open) el.lbBackupStyle = el.style.visibility;
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el.style.visibility = open ? 'hidden' : el.lbBackupStyle;
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});
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var fn = open ? 'addEvent' : 'removeEvent';
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window[fn]('scroll', this.eventPosition)[fn]('resize', this.eventPosition);
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document[fn]('keydown', this.eventKeyDown);
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this.step = 0;
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},
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keyboardListener: function(event){
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switch (event.keyCode){
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case 27: case 88: case 67: this.close(); break;
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case 37: case 80: this.previous(); break;
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case 39: case 78: this.next();
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}
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},
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previous: function(){
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return this.changeImage(this.activeImage-1);
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},
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next: function(){
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return this.changeImage(this.activeImage+1);
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},
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changeImage: function(imageNum){
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if (this.step || (imageNum < 0) || (imageNum >= this.images.length)) return false;
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this.step = 1;
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this.activeImage = imageNum;
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this.center.style.backgroundColor = '';
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this.bottomContainer.style.display = this.prevLink.style.display = this.nextLink.style.display = 'none';
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this.fx.image.hide();
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this.center.className = 'lbLoading';
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this.preload = new Image();
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this.preload.onload = this.nextEffect.bind(this);
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this.preload.src = this.images[imageNum][0];
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return false;
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},
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nextEffect: function(){
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switch (this.step++){
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case 1:
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this.center.className = '';
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this.image.style.backgroundImage = 'url('+this.images[this.activeImage][0]+')';
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this.image.style.width = this.bottom.style.width = this.preload.width+'px';
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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] || '');
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this.number.setHTML((!this.options.showCounter || (this.images.length == 1)) ? '' : 'Image '+(this.activeImage+1)+' of '+this.images.length);
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if (this.activeImage) this.preloadPrev.src = this.images[this.activeImage-1][0];
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if (this.activeImage != (this.images.length - 1)) this.preloadNext.src = this.images[this.activeImage+1][0];
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if (this.center.clientHeight != this.image.offsetHeight){
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this.fx.resize.start({height: this.image.offsetHeight});
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break;
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}
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this.step++;
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case 2:
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if (this.center.clientWidth != this.image.offsetWidth){
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this.fx.resize.start({width: this.image.offsetWidth, marginLeft: -this.image.offsetWidth/2});
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break;
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}
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this.step++;
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case 3:
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this.bottomContainer.setStyles({top: this.top + this.center.clientHeight, height: 0, marginLeft: this.center.style.marginLeft, display: ''});
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this.fx.image.start(1);
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break;
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case 4:
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this.center.style.backgroundColor = '#000';
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if (this.options.animateCaption){
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this.fx.bottom.set(-this.bottom.offsetHeight);
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this.bottomContainer.style.height = '';
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this.fx.bottom.start(0);
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break;
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}
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this.bottomContainer.style.height = '';
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case 5:
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if (this.activeImage) this.prevLink.style.display = '';
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if (this.activeImage != (this.images.length - 1)) this.nextLink.style.display = '';
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this.step = 0;
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}
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},
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close: function(){
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if (this.step < 0) return false;
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this.step = -1;
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if (this.preload){
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this.preload.onload = Class.empty;
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this.preload = null;
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}
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for (var f in this.fx) this.fx[f].stop();
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this.center.style.display = this.bottomContainer.style.display = 'none';
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this.fx.overlay.chain(this.setup.pass(false, this)).start(0);
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return false;
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}
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};
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window.addEvent('domready', Lightbox.init.bind(Lightbox));
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