10 lines
12 KiB
JavaScript
10 lines
12 KiB
JavaScript
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/*!
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* # Semantic UI 2.2.7 - Sticky
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* http://github.com/semantic-org/semantic-ui/
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*
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*
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* Released under the MIT license
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* http://opensource.org/licenses/MIT
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*
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*/
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!function(e,t,o,n){"use strict";t="undefined"!=typeof t&&t.Math==Math?t:"undefined"!=typeof self&&self.Math==Math?self:Function("return this")(),e.fn.sticky=function(i){var s,r=e(this),c=r.selector||"",l=(new Date).getTime(),a=[],f=arguments[0],m="string"==typeof f,u=[].slice.call(arguments,1);return r.each(function(){var r,d,h,g,p,b=e.isPlainObject(i)?e.extend(!0,{},e.fn.sticky.settings,i):e.extend({},e.fn.sticky.settings),v=b.className,x=b.namespace,C=b.error,S="."+x,y="module-"+x,k=e(this),T=e(t),w=e(b.scrollContext),z=(k.selector||"",k.data(y)),B=t.requestAnimationFrame||t.mozRequestAnimationFrame||t.webkitRequestAnimationFrame||t.msRequestAnimationFrame||function(e){setTimeout(e,0)},P=this;p={initialize:function(){p.determineContainer(),p.determineContext(),p.verbose("Initializing sticky",b,r),p.save.positions(),p.checkErrors(),p.bind.events(),b.observeChanges&&p.observeChanges(),p.instantiate()},instantiate:function(){p.verbose("Storing instance of module",p),z=p,k.data(y,p)},destroy:function(){p.verbose("Destroying previous instance"),p.reset(),h&&h.disconnect(),g&&g.disconnect(),T.off("load"+S,p.event.load).off("resize"+S,p.event.resize),w.off("scrollchange"+S,p.event.scrollchange),k.removeData(y)},observeChanges:function(){"MutationObserver"in t&&(h=new MutationObserver(p.event.documentChanged),g=new MutationObserver(p.event.changed),h.observe(o,{childList:!0,subtree:!0}),g.observe(P,{childList:!0,subtree:!0}),g.observe(d[0],{childList:!0,subtree:!0}),p.debug("Setting up mutation observer",g))},determineContainer:function(){r=b.container?e(b.container):k.offsetParent()},determineContext:function(){if(d=b.context?e(b.context):r,0===d.length)return void p.error(C.invalidContext,b.context,k)},checkErrors:function(){if(p.is.hidden()&&p.error(C.visible,k),p.cache.element.height>p.cache.context.height)return p.reset(),void p.error(C.elementSize,k)},bind:{events:function(){T.on("load"+S,p.event.load).on("resize"+S,p.event.resize),w.off("scroll"+S).on("scroll"+S,p.event.scroll).on("scrollchange"+S,p.event.scrollchange)}},event:{changed:function(e){clearTimeout(p.timer),p.timer=setTimeout(function(){p.verbose("DOM tree modified, updating sticky menu",e),p.refresh()},100)},documentChanged:function(t){[].forEach.call(t,function(t){t.removedNodes&&[].forEach.call(t.removedNodes,function(t){(t==P||e(t).find(P).length>0)&&(p.debug("Element removed from DOM, tearing down events"),p.destroy())})})},load:function(){p.verbose("Page contents finished loading"),B(p.refresh)},resize:function(){p.verbose("Window resized"),B(p.refresh)},scroll:function(){B(function(){w.triggerHandler("scrollchange"+S,w.scrollTop())})},scrollchange:function(e,t){p.stick(t),b.onScroll.call(P)}},refresh:function(e){p.reset(),b.context||p.determineContext(),e&&p.determineContainer(),p.save.positions(),p.stick(),b.onReposition.call(P)},supports:{sticky:function(){var t=e("<div/>");t[0];return t.addClass(v.supported),t.css("position").match("sticky")}},save:{lastScroll:function(e){p.lastScroll=e},elementScroll:function(e){p.elementScroll=e},positions:function(){var e={height:w.height()},t={margin:{top:parseInt(k.css("margin-top"),10),bottom:parseInt(k.css("margin-bottom"),10)},offset:k.offset(),width:k.outerWidth(),height:k.outerHeight()},o={offset:d.offset(),height:d.outerHeight()};({height:r.outerHeight()});p.is.standardScroll()||(p.debug("Non-standard scroll. Removing scroll offset from element offset"),e.top=w.scrollTop(),e.left=w.scrollLeft(),t.offset.top+=e.top,o.offset.top+=e.top,t.offset.left+=e.left,o.offset.left+=e.left),p.cache={fits:t.height<e.height,scrollContext:{height:e.height},element:{margin:t.margin,top:t.offset.top-t.margin.top,left:t.offset.left,width:t.width,height:t.height,bottom:t.offset.top+t.height},context:{top:o.offset.top,height:o.height,bottom:o.offset.top+o.height}},p.set.containerSize(),p.set.size(),p.stick(),p.debug("Caching element positions",p.cache)}},get:{direction:function(e){var t="down";return e=e||w.scrollTop(),p.lastScroll!==n&&(p.lastScroll<e?t="down":p.lastScroll>e&&(t="up")),t},scrollChange:function(e){return e=
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