calcifer/web/semantic/dist/components/sticky.min.js

/*!
 * # Semantic UI 2.1.7 - Sticky
 * http://github.com/semantic-org/semantic-ui/
 *
 *
 * Copyright 2015 Contributors
 * Released under the MIT license
 * http://opensource.org/licenses/MIT
 *
 */
!function(e,t,o,n){"use strict";e.fn.sticky=function(o){var i,s=e(this),r=s.selector||"",l=(new Date).getTime(),c=[],a=arguments[0],f="string"==typeof a,m=[].slice.call(arguments,1);return s.each(function(){var s,u,d,h,g=e.isPlainObject(o)?e.extend(!0,{},e.fn.sticky.settings,o):e.extend({},e.fn.sticky.settings),p=g.className,b=g.namespace,v=g.error,x="."+b,C="module-"+b,S=e(this),y=e(t),k=e(g.scrollContext),T=(S.selector||"",S.data(C)),z=t.requestAnimationFrame||t.mozRequestAnimationFrame||t.webkitRequestAnimationFrame||t.msRequestAnimationFrame||function(e){setTimeout(e,0)},w=this;h={initialize:function(){h.determineContainer(),h.determineContext(),h.verbose("Initializing sticky",g,s),h.save.positions(),h.checkErrors(),h.bind.events(),g.observeChanges&&h.observeChanges(),h.instantiate()},instantiate:function(){h.verbose("Storing instance of module",h),T=h,S.data(C,h)},destroy:function(){h.verbose("Destroying previous instance"),h.reset(),d&&d.disconnect(),y.off("load"+x,h.event.load).off("resize"+x,h.event.resize),k.off("scrollchange"+x,h.event.scrollchange),S.removeData(C)},observeChanges:function(){var e=u[0];"MutationObserver"in t&&(d=new MutationObserver(function(e){clearTimeout(h.timer),h.timer=setTimeout(function(){h.verbose("DOM tree modified, updating sticky menu",e),h.refresh()},100)}),d.observe(w,{childList:!0,subtree:!0}),d.observe(e,{childList:!0,subtree:!0}),h.debug("Setting up mutation observer",d))},determineContainer:function(){s=S.offsetParent()},determineContext:function(){return u=g.context?e(g.context):s,0===u.length?void h.error(v.invalidContext,g.context,S):void 0},checkErrors:function(){return h.is.hidden()&&h.error(v.visible,S),h.cache.element.height>h.cache.context.height?(h.reset(),void h.error(v.elementSize,S)):void 0},bind:{events:function(){y.on("load"+x,h.event.load).on("resize"+x,h.event.resize),k.off("scroll"+x).on("scroll"+x,h.event.scroll).on("scrollchange"+x,h.event.scrollchange)}},event:{load:function(){h.verbose("Page contents finished loading"),z(h.refresh)},resize:function(){h.verbose("Window resized"),z(h.refresh)},scroll:function(){z(function(){k.triggerHandler("scrollchange"+x,k.scrollTop())})},scrollchange:function(e,t){h.stick(t),g.onScroll.call(w)}},refresh:function(e){h.reset(),g.context||h.determineContext(),e&&h.determineContainer(),h.save.positions(),h.stick(),g.onReposition.call(w)},supports:{sticky:function(){{var t=e("<div/>");t[0]}return t.addClass(p.supported),t.css("position").match("sticky")}},save:{lastScroll:function(e){h.lastScroll=e},elementScroll:function(e){h.elementScroll=e},positions:function(){{var e={height:k.height()},t={margin:{top:parseInt(S.css("margin-top"),10),bottom:parseInt(S.css("margin-bottom"),10)},offset:S.offset(),width:S.outerWidth(),height:S.outerHeight()},o={offset:u.offset(),height:u.outerHeight()};({height:s.outerHeight()})}h.is.standardScroll()||(h.debug("Non-standard scroll. Removing scroll offset from element offset"),e.top=k.scrollTop(),e.left=k.scrollLeft(),t.offset.top+=e.top,o.offset.top+=e.top,t.offset.left+=e.left,o.offset.left+=e.left),h.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}},h.set.containerSize(),h.set.size(),h.stick(),h.debug("Caching element positions",h.cache)}},get:{direction:function(e){var t="down";return e=e||k.scrollTop(),h.lastScroll!==n&&(h.lastScroll<e?t="down":h.lastScroll>e&&(t="up")),t},scrollChange:function(e){return e=e||k.scrollTop(),h.lastScroll?e-h.lastScroll:0},currentElementScroll:function(){return h.elementScroll?h.elementScroll:h.is.top()?Math.abs(parseInt(S.css("top"),10))||0:Math.abs(parseInt(S.css("bottom"),10))||0},elementScroll:function(e){e=e||k.scrollTop();var t=h.cache.element,o=h.cache.scrollContext,n=h.get.scrollChange(e),i=t.height-o.height+g.offset,s=h.get.currentElementScroll(),r=s+n;return s=h.cache.fits||0>r?0:r>i?i:r}},remove:{lastScroll:function(){delete h.last