|
|
/*! * # Semantic UI 2.2.2 - Visibility * http://github.com/semantic-org/semantic-ui/
* * * Released under the MIT license * http://opensource.org/licenses/MIT
* */!function(e,n,o,t){"use strict";n="undefined"!=typeof n&&n.Math==Math?n:"undefined"!=typeof self&&self.Math==Math?self:Function("return this")(),e.fn.visibility=function(i){var s,c=e(this),r=c.selector||"",a=(new Date).getTime(),l=[],d=arguments[0],u="string"==typeof d,f=[].slice.call(arguments,1),m=c.length,g=0;return c.each(function(){var c,b,v,p,h=e.isPlainObject(i)?e.extend(!0,{},e.fn.visibility.settings,i):e.extend({},e.fn.visibility.settings),P=h.className,x=h.namespace,C=h.error,y=h.metadata,R="."+x,V="module-"+x,S=e(n),k=e(this),T=e(h.context),O=(k.selector||"",k.data(V)),A=n.requestAnimationFrame||n.mozRequestAnimationFrame||n.webkitRequestAnimationFrame||n.msRequestAnimationFrame||function(e){setTimeout(e,0)},z=this,w=!1;p={initialize:function(){p.debug("Initializing",h),p.setup.cache(),p.should.trackChanges()&&("image"==h.type&&p.setup.image(),"fixed"==h.type&&p.setup.fixed(),h.observeChanges&&p.observeChanges(),p.bind.events()),p.save.position(),p.is.visible()||p.error(C.visible,k),h.initialCheck&&p.checkVisibility(),p.instantiate()},instantiate:function(){p.debug("Storing instance",p),k.data(V,p),O=p},destroy:function(){p.verbose("Destroying previous module"),v&&v.disconnect(),b&&b.disconnect(),S.off("load"+R,p.event.load).off("resize"+R,p.event.resize),T.off("scroll"+R,p.event.scroll).off("scrollchange"+R,p.event.scrollchange),"fixed"==h.type&&(p.resetFixed(),p.remove.placeholder()),k.off(R).removeData(V)},observeChanges:function(){"MutationObserver"in n&&(b=new MutationObserver(p.event.contextChanged),v=new MutationObserver(p.event.changed),b.observe(o,{childList:!0,subtree:!0}),v.observe(z,{childList:!0,subtree:!0}),p.debug("Setting up mutation observer",v))},bind:{events:function(){p.verbose("Binding visibility events to scroll and resize"),h.refreshOnLoad&&S.on("load"+R,p.event.load),S.on("resize"+R,p.event.resize),T.off("scroll"+R).on("scroll"+R,p.event.scroll).on("scrollchange"+R,p.event.scrollchange)}},event:{changed:function(e){p.verbose("DOM tree modified, updating visibility calculations"),p.timer=setTimeout(function(){p.verbose("DOM tree modified, updating sticky menu"),p.refresh()},100)},contextChanged:function(n){[].forEach.call(n,function(n){n.removedNodes&&[].forEach.call(n.removedNodes,function(n){(n==z||e(n).find(z).length>0)&&(p.debug("Element removed from DOM, tearing down events"),p.destroy())})})},resize:function(){p.debug("Window resized"),h.refreshOnResize&&A(p.refresh)},load:function(){p.debug("Page finished loading"),A(p.refresh)},scroll:function(){h.throttle?(clearTimeout(p.timer),p.timer=setTimeout(function(){T.triggerHandler("scrollchange"+R,[T.scrollTop()])},h.throttle)):A(function(){T.triggerHandler("scrollchange"+R,[T.scrollTop()])})},scrollchange:function(e,n){p.checkVisibility(n)}},precache:function(n,t){n instanceof Array||(n=[n]);for(var i=n.length,s=0,c=[],r=o.createElement("img"),a=function(){s++,s>=n.length&&e.isFunction(t)&&t()};i--;)r=o.createElement("img"),r.onload=a,r.onerror=a,r.src=n[i],c.push(r)},enableCallbacks:function(){p.debug("Allowing callbacks to occur"),w=!1},disableCallbacks:function(){p.debug("Disabling all callbacks temporarily"),w=!0},should:{trackChanges:function(){return u?(p.debug("One time query, no need to bind events"),!1):(p.debug("Callbacks being attached"),!0)}},setup:{cache:function(){p.cache={occurred:{},screen:{},element:{}}},image:function(){var e=k.data(y.src);e&&(p.verbose("Lazy loading image",e),h.once=!0,h.observeChanges=!1,h.onOnScreen=function(){p.debug("Image on screen",z),p.precache(e,function(){p.set.image(e,function(){g++,g==m&&h.onAllLoaded.call(this),h.onLoad.call(this)})})})},fixed:function(){p.debug("Setting up fixed"),h.once=!1,h.observeChanges=!1,h.initialCheck=!0,h.refreshOnLoad=!0,i.transition||(h.transition=!1),p.create.placeholder(),p.debug("Added placeholder",c),h.onTopPassed=function(){p.debug("Element passed, adding fixed position",k),p.show.placeholder(),p.set.fixed(),h.transition&&e.fn.transition!==t&&k.transition(h.transition,h.duration)},h.onTopPassedReverse=function(){p.debug("Element returned to position, rem
|
