2 lines
12 KiB
JavaScript
2 lines
12 KiB
JavaScript
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/*! Stellar.js v0.6.1 | Copyright 2013, Mark Dalgleish | http://markdalgleish.com/projects/stellar.js | http://markdalgleish.mit-license.org */
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(function(e,t,n,r){function d(t,n){this.element=t,this.options=e.extend({},s,n),this._defaults=s,this._name=i,this.init()}var i="stellar",s={scrollProperty:"scroll",positionProperty:"position",horizontalScrolling:!0,verticalScrolling:!0,horizontalOffset:0,verticalOffset:0,responsive:!1,parallaxBackgrounds:!0,parallaxElements:!0,hideDistantElements:!0,hideElement:function(e){e.hide()},showElement:function(e){e.show()}},o={scroll:{getLeft:function(e){return e.scrollLeft()},setLeft:function(e,t){e.scrollLeft(t)},getTop:function(e){return e.scrollTop()},setTop:function(e,t){e.scrollTop(t)}},position:{getLeft:function(e){return parseInt(e.css("left"),10)*-1},getTop:function(e){return parseInt(e.css("top"),10)*-1}},margin:{getLeft:function(e){return parseInt(e.css("margin-left"),10)*-1},getTop:function(e){return parseInt(e.css("margin-top"),10)*-1}},transform:{getLeft:function(e){var t=getComputedStyle(e[0])[f];return t!=="none"?parseInt(t.match(/(-?[0-9]+)/g)[4],10)*-1:0},getTop:function(e){var t=getComputedStyle(e[0])[f];return t!=="none"?parseInt(t.match(/(-?[0-9]+)/g)[5],10)*-1:0}}},u={position:{setLeft:function(e,t){e.css("left",t)},setTop:function(e,t){e.css("top",t)}},transform:{setPosition:function(e,t,n,r,i){e[0].style[f]="translate3d("+(t-n)+"px, "+(r-i)+"px, 0)"}}},a=function(){var t=/^(Moz|Webkit|Khtml|O|ms|Icab)(?=[A-Z])/,n=e("script")[0].style,r="",i;for(i in n)if(t.test(i)){r=i.match(t)[0];break}return"WebkitOpacity"in n&&(r="Webkit"),"KhtmlOpacity"in n&&(r="Khtml"),function(e){return r+(r.length>0?e.charAt(0).toUpperCase()+e.slice(1):e)}}(),f=a("transform"),l=e("<div />").css("background-position-x")!==r,c=l?function(e,t,n){e.css({"background-position-x":t,"background-position-y":n})}:function(e,t,n){e.css("background-position",t+" "+n)},h=l?function(e){return[e.css("background-position-x"),e.css("background-position-y")]}:function(e){return e.css("background-position").split(" ")},p=t.requestAnimationFrame||t.webkitRequestAnimationFrame||t.mozRequestAnimationFrame||t.oRequestAnimationFrame||t.msRequestAnimationFrame||function(e){setTimeout(e,1e3/60)};d.prototype={init:function(){this.options.name=i+"_"+Math.floor(Math.random()*1e9),this._defineElements(),this._defineGetters(),this._defineSetters(),this._handleWindowLoadAndResize(),this._detectViewport(),this.refresh({firstLoad:!0}),this.options.scrollProperty==="scroll"?this._handleScrollEvent():this._startAnimationLoop()},_defineElements:function(){this.element===n.body&&(this.element=t),this.$scrollElement=e(this.element),this.$element=this.element===t?e("body"):this.$scrollElement,this.$viewportElement=this.options.viewportElement!==r?e(this.options.viewportElement):this.$scrollElement[0]===t||this.options.scrollProperty==="scroll"?this.$scrollElement:this.$scrollElement.parent()},_defineGetters:function(){var e=this,t=o[e.options.scrollProperty];this._getScrollLeft=function(){return t.getLeft(e.$scrollElement)},this._getScrollTop=function(){return t.getTop(e.$scrollElement)}},_defineSetters:function(){var t=this,n=o[t.options.scrollProperty],r=u[t.options.positionProperty],i=n.setLeft,s=n.setTop;this._setScrollLeft=typeof i=="function"?function(e){i(t.$scrollElement,e)}:e.noop,this._setScrollTop=typeof s=="function"?function(e){s(t.$scrollElement,e)}:e.noop,this._setPosition=r.setPosition||function(e,n,i,s,o){t.options.horizontalScrolling&&r.setLeft(e,n,i),t.options.verticalScrolling&&r.setTop(e,s,o)}},_handleWindowLoadAndResize:function(){var n=this,r=e(t);n.options.responsive&&r.bind("load."+this.name,function(){n.refresh()}),r.bind("resize."+this.name,function(){n._detectViewport(),n.options.responsive&&n.refresh()})},refresh:function(n){var r=this,i=r._getScrollLeft(),s=r._getScrollTop();(!n||!n.firstLoad)&&this._reset(),this._setScrollLeft(0),this._setScrollTop(0),this._setOffsets(),this._findParticles(),this._findBackgrounds(),n&&n.firstLoad&&/WebKit/.test(navigator.userAgent)&&e(t).load(function(){var e=r._getScrollLeft(),t=r._getScrollTop();r._setScrollLeft(e+1),r._setScrollTop(t+1),r._setScrollLeft(e),r._setScrollTop(t)}),this._setScrollLeft(i),t
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