stash/ui/v2/public/jwplayer/polyfills.intersection-observer.js

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Intersection Observer v0.5.0
Copyright (c) 2016 Google Inc. (http://google.com)
https://github.com/w3c/IntersectionObserver/blob/v0.5.0/LICENSE.md

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(window.webpackJsonpjwplayer=window.webpackJsonpjwplayer||[]).push([[7],{30:function(t,e){!function(t,e){"use strict";if("IntersectionObserver"in t&&"IntersectionObserverEntry"in t&&"intersectionRatio"in t.IntersectionObserverEntry.prototype)"isIntersecting"in t.IntersectionObserverEntry.prototype||Object.defineProperty(t.IntersectionObserverEntry.prototype,"isIntersecting",{get:function(){return this.intersectionRatio>0}});else{var n=[];i.prototype.THROTTLE_TIMEOUT=100,i.prototype.POLL_INTERVAL=null,i.prototype.USE_MUTATION_OBSERVER=!0,i.prototype.observe=function(t){if(!this._observationTargets.some((function(e){return e.element==t}))){if(!t||1!=t.nodeType)throw new Error("target must be an Element");this._registerInstance(),this._observationTargets.push({element:t,entry:null}),this._monitorIntersections(),this._checkForIntersections()}},i.prototype.unobserve=function(t){this._observationTargets=this._observationTargets.filter((function(e){return e.element!=t})),this._observationTargets.length||(this._unmonitorIntersections(),this._unregisterInstance())},i.prototype.disconnect=function(){this._observationTargets=[],this._unmonitorIntersections(),this._unregisterInstance()},i.prototype.takeRecords=function(){var t=this._queuedEntries.slice();return this._queuedEntries=[],t},i.prototype._initThresholds=function(t){var e=t||[0];return Array.isArray(e)||(e=[e]),e.sort().filter((function(t,e,n){if("number"!=typeof t||isNaN(t)||t<0||t>1)throw new Error("threshold must be a number between 0 and 1 inclusively");return t!==n[e-1]}))},i.prototype._parseRootMargin=function(t){var e=(t||"0px").split(/\s+/).map((function(t){var e=/^(-?\d*\.?\d+)(px|%)$/.exec(t);if(!e)throw new Error("rootMargin must be specified in pixels or percent");return{value:parseFloat(e[1]),unit:e[2]}}));return e[1]=e[1]||e[0],e[2]=e[2]||e[0],e[3]=e[3]||e[1],e},i.prototype._monitorIntersections=function(){this._monitoringIntersections||(this._monitoringIntersections=!0,this.POLL_INTERVAL?this._monitoringInterval=setInterval(this._checkForIntersections,this.POLL_INTERVAL):(r(t,"resize",this._checkForIntersections,!0),r(e,"scroll",this._checkForIntersections,!0),this.USE_MUTATION_OBSERVER&&"MutationObserver"in t&&(this._domObserver=new MutationObserver(this._checkForIntersections),this._domObserver.observe(e,{attributes:!0,childList:!0,characterData:!0,subtree:!0}))))},i.prototype._unmonitorIntersections=function(){this._monitoringIntersections&&(this._monitoringIntersections=!1,clearInterval(this._monitoringInterval),this._monitoringInterval=null,s(t,"resize",this._checkForIntersections,!0),s(e,"scroll",this._checkForIntersections,!0),this._domObserver&&(this._domObserver.disconnect(),this._domObserver=null))},i.prototype._checkForIntersections=function(){var e=this._rootIsInDom(),n=e?this._getRootRect():{top:0,bottom:0,left:0,right:0,width:0,height:0};this._observationTargets.forEach((function(i){var r=i.element,s=h(r),c=this._rootContainsTarget(r),a=i.entry,u=e&&c&&this._computeTargetAndRootIntersection(r,n),p=i.entry=new o({time:t.performance&&performance.now&&performance.now(),target:r,boundingClientRect:s,rootBounds:n,intersectionRect:u});a?e&&c?this._hasCrossedThreshold(a,p)&&this._queuedEntries.push(p):a&&a.isIntersecting&&this._queuedEntries.push(p):this._queuedEntries.push(p)}),this),this._queuedEntries.length&&this._callback(this.takeRecords(),this)},i.prototype._computeTargetAndRootIntersection=function(n,o){if("none"!=t.getComputedStyle(n).display){for(var i,r,s,c,u,p,l,d,f=h(n),g=a(n),_=!1;!_;){var v=null,m=1==g.nodeType?t.getComputedStyle(g):{};if("none"==m.display)return;if(g==this.root||g==e?(_=!0,v=o):g!=e.body&&g!=e.documentElement&&"visible"!=m.overflow&&(v=h(g)),v&&(i=v,r=f,s=void 0,c=void 0,u=void 0,p=void 0,l=void 0,d=void 0,s=Math.max(i.top,r.top),c=Math.min(i.bottom,r.bottom),u=Math.max(i.left,r.left),p=Math.min(i.right,r.right),d=c-s,!(f=(l=p-u)>=0&&d>=0&&{top:s,bottom:c,left:u,right:p,width:l,height:d})))break;g=a(g)}return f}},i.prototype._getRootRect=function(){var t;if(this.root)t=h(this.root);else{var n=e.documentElement,o=e.bod