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ReaderSharedUI.js
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ReaderSharedUI.js
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/* Copyright (c) 2023 Apple Inc. All rights reserved. */
// Copyright (c) 2013 Apple Inc. All rights reserved.
function articleHeight() {
return document.getElementById("article").offsetHeight + 2 * parseFloat(getComputedStyle(document.getElementById("article")).marginTop)
}
function smoothScroll(e, t, n, i) {
function o(t, n) {
scrollEventIsSmoothScroll = !0, e.scrollTop = n, setTimeout((function() {
scrollEventIsSmoothScroll = !1
}), 0)
}
const r = 1e3 / 60;
let a = e.scrollTop,
l = a + t,
s = 0,
d = articleHeight() - window.innerHeight;
if (l < s && (l = s), l > d && (l = d), a == l) return;
let c = Math.abs(l - a);
if (c < Math.abs(t) && (n = n * c / Math.abs(t)), smoothScrollingAnimator) {
let e = smoothScrollingAnimator.animations[0].progress,
t = e > .5 ? 1 - e : e,
s = n / (1 - t),
d = -t * s,
c = Math.sin(Math.PI / 2 * t),
m = c * c,
u = (a - l * m) / (1 - m);
return abortSmoothScroll(), smoothScrollingAnimator = new AppleAnimator(s, r, i), smoothScrollingAnimation = new AppleAnimation(u, l, o), smoothScrollingAnimator.addAnimation(smoothScrollingAnimation), void smoothScrollingAnimator.start(d)
}
smoothScrollingAnimator = new AppleAnimator(n, r, i), smoothScrollingAnimation = new AppleAnimation(a, l, o), smoothScrollingAnimator.addAnimation(smoothScrollingAnimation), smoothScrollingAnimator.start()
}
function abortSmoothScroll() {
smoothScrollingAnimator.stop(AnimationTerminationCondition.Interrupted), smoothScrollingAnimator = null, smoothScrollingAnimation = null
}
function articleScrolled() {
!scrollEventIsSmoothScroll && smoothScrollingAnimator && abortSmoothScroll(), ReaderJSController.articleScrolled()
}
function traverseReaderContent(e, t) {
if (!e) return;
let n = e.offsetTop,
i = document.createTreeWalker(document.getElementById("article"), NodeFilter.SHOW_ELEMENT, {
acceptNode: function(e) {
let t = e.classList;
return t.contains("page-number") || t.contains("float") || t.contains("page") || t.contains("scrollable") || "HR" === e.tagName || 0 === e.offsetHeight || "inline" === getComputedStyle(e).display || n === e.offsetTop ? NodeFilter.FILTER_SKIP : NodeFilter.FILTER_ACCEPT
}
});
return i.currentNode = e, i[t]()
}
function nextReaderContentElement(e) {
return traverseReaderContent(e, "nextNode")
}
function previousReaderContentElement(e) {
return traverseReaderContent(e, "previousNode")
}
function articleTitleElement() {
return document.querySelector("#article .page .title")
}
function mediaElementIsPlaying(e) {
return !!(e.currentTime > 0 && !e.paused && !e.ended && e.readyState > 2)
}
function keyDown(e) {
let t = !(e.metaKey || e.altKey || e.ctrlKey || e.shiftKey),
n = !e.metaKey && !e.altKey && !e.ctrlKey && e.shiftKey;
switch (e.keyCode) {
case 8:
n ? ReaderJSController.goForward() : t && ReaderJSController.goBack(), e.preventDefault();
break;
case 74:
ContentAwareScrollerJS.scroll(ContentAwareNavigationDirection.Down);
break;
case 75:
ContentAwareScrollerJS.scroll(ContentAwareNavigationDirection.Up);
break;
case 82:
t && ReaderJS.reloadArticlePreservingScrollPosition()
}
}
function getArticleScrollPosition() {
scrollInfo = {}, scrollInfo.version = 1;
let e = document.getElementsByClassName("page"),
t = e.length;
if (!t) return scrollInfo.pageIndex = 0, scrollInfo;
scrollInfo.pageIndex = e.length - 1;
let n = window.scrollY;
for (let i = 0; i < t; i++) {
let t = e[i];
if (t.offsetTop + t.offsetHeight >= n) {
scrollInfo.pageIndex = i;
break
}
}
return scrollInfo
}
function restoreInitialArticleScrollPosition() {
let e = document.getElementsByClassName("page")[initialScrollPosition.pageIndex];
e && (document.scrollingElement.scrollTop = e.offsetTop)
}
function restoreInitialArticleScrollPositionIfPossible() {
if (didRestoreInitialScrollPosition) return;
if (!initialScrollPosition && (initialScrollPosition = ReaderJSController.initialArticleScrollPosition(), !initialScrollPosition || !initialScrollPosition.pageIndex)) return void(didRestoreInitialScrollPosition = !0);
let e = document.getElementsByClassName("page-number").length;
initialScrollPosition.pageIndex >= e || (setTimeout(restoreInitialArticleScrollPosition, DelayBeforeRestoringScrollPositionInMs), didRestoreInitialScrollPosition = !0)
}
function makeWideElementsScrollable() {
let e = document.querySelectorAll("table, pre");
for (let t of e) {
if (t.classList.contains("float")) continue;
if (t.parentElement.classList.contains("scrollable")) continue;
let e = document.createElement("div");
t.parentElement.insertBefore(e, t), t.remove(), e.appendChild(t), e.classList.add("scrollable")
}
}
function fontSettings(e) {
function t(e) {
return e.replace(/\W/g, "").toLowerCase()
}
const n = [15, 16, 17, 18, 19, 20, 21, 23, 26, 28, 37, 46],
i = ["25px", "26px", "27px", "28px", "29px", "30px", "31px", "33px", "37px", "39px", "51px", "62px"];
let o = {
System: {
lineHeights: ["25px", "26px", "27px", "29px", "30px", "31px", "32px", "33px", "38px", "39px", "51px", "62px"],
usesSystemFont: !0
},
Charter: {
lineHeights: ["25px", "26px", "27px", "28px", "29px", "30px", "32px", "34px", "38px", "39px", "51px", "62px"]
},
Georgia: {
lineHeights: ["25px", "26px", "27px", "28px", "29px", "30px", "32px", "34px", "38px", "41px", "51px", "62px"]
},
"Iowan Old Style": {
lineHeights: ["25px", "26px", "27px", "28px", "29px", "30px", "32px", "34px", "38px", "39px", "51px", "62px"]
},
Palatino: {
lineHeights: ["25px", "26px", "27px", "28px", "29px", "30px", "31px", "34px", "37px", "40px", "51px", "62px"]
},
Seravek: {
lineHeights: ["25px", "26px", "27px", "28px", "28px", "30px", "31px", "34px", "37px", "39px", "51px", "62px"]
},
"Hiragino Sans W3": {
lineHeights: ["1.85em", "1.78em", "1.74em", "1.71em", "1.72em", "1.73em", "1.75em", "1.76em", "1.78em", "1.9em", "1.92em", "2em"]
},
"Hiragino Kaku Gothic ProN": {
lineHeights: ["1.85em", "1.78em", "1.74em", "1.7em", "1.69em", "1.68em", "1.69em", "1.7em", "1.74em", "1.85em", "1.9em", "2em"]
},
"Hiragino Mincho ProN": {
lineHeights: ["1.75em", "1.72em", "1.69em", "1.66em", "1.64em", "1.56em", "1.53em", "1.56em", "1.6em", "1.65em", "1.69em", "1.72em"]
},
"Hiragino Maru Gothic ProN": {
lineHeights: ["1.85em", "1.78em", "1.74em", "1.7em", "1.69em", "1.68em", "1.69em", "1.7em", "1.74em", "1.85em", "1.9em", "2em"]
},
"PingFang SC": {
lineHeights: ["1.85em", "1.78em", "1.74em", "1.7em", "1.69em", "1.68em", "1.69em", "1.7em", "1.74em", "1.85em", "1.9em", "2em"],
usesSystemFont: !0
},
"Heiti SC": {
lineHeights: ["1.85em", "1.78em", "1.74em", "1.7em", "1.7em", "1.71em", "1.72em", "1.75em", "1.8em", "1.9em", "1.95em", "2em"]
},
"Songti SC": {
lineHeights: ["1.8em", "1.78em", "1.74em", "1.72em", "1.71em", "1.72em", "1.73em", "1.75em", "1.8em", "1.9em", "1.95em", "1.96em"]
},
"Kaiti SC": {
lineHeights: ["1.75em", "1.72em", "1.69em", "1.66em", "1.64em", "1.56em", "1.53em", "1.56em", "1.6em", "1.65em", "1.69em", "1.72em"]
},
"Yuanti SC": {
lineHeights: ["1.95em", "1.93em", "1.9em", "1.87em", "1.85em", "1.8em", "1.83em", "1.85em", "1.88em", "1.9em", "1.91em", "1.92em"]
},
"Libian SC": {
fontSizes: [27, 28, 29, 30, 31, 32, 33, 35, 37, 40, 42, 46],
lineHeights: ["1.65em", "1.63em", "1.62em", "1.61em", "1.6em", "1.6em", "1.61em", "1.62em", "1.63em", "1.64em", "1.64em", "1.65em"]
},
"Weibei SC": {
fontSizes: [21, 22, 23, 24, 25, 26, 27, 29, 32, 34, 39, 43],
lineHeights: ["1.65em", "1.63em", "1.62em", "1.61em", "1.6em", "1.6em", "1.61em", "1.62em", "1.63em", "1.64em", "1.64em", "1.65em"]
},
"Yuppy SC": {
lineHeights: ["1.75em", "1.73em", "1.7em", "1.67em", "1.65em", "1.6em", "1.63em", "1.65em", "1.68em", "1.7em", "1.71em", "1.72em"]
},
"PingFang TC": {
lineHeights: ["1.85em", "1.78em", "1.75em", "1.72em", "1.7em", "1.7em", "1.7em", "1.72em", "1.75em", "1.82em", "1.85em", "1.9em"],
usesSystemFont: !0
},
"Heiti TC": {
lineHeights: ["1.85em", "1.78em", "1.75em", "1.72em", "1.71em", "1.71em", "1.72em", "1.75em", "1.78em", "1.82em", "1.86em", "1.9em"]
},
"Songti TC": {
lineHeights: ["1.8em", "1.78em", "1.74em", "1.73em", "1.72em", "1.72em", "1.73em", "1.75em", "1.8em", "1.9em", "1.95em", "1.96em"]
},
"Kaiti TC": {
fontSizes: [20, 21, 22, 23, 24, 25, 26, 28, 31, 33, 38, 43],
lineHeights: ["1.63em", "1.62em", "1.62em", "1.6em", "1.56em", "1.53em", "1.5em", "1.53em", "1.56em", "1.6em", "1.62em", "1.63em"]
},
"Yuanti TC": {
lineHeights: ["1.95em", "1.93em", "1.9em", "1.87em", "1.85em", "1.8em", "1.83em", "1.85em", "1.88em", "1.9em", "1.91em", "1.92em"]
},
"Libian TC": {
fontSizes: [27, 28, 29, 30, 31, 32, 33, 35, 37, 40, 42, 46],
lineHeights: ["1.65em", "1.63em", "1.62em", "1.61em", "1.6em", "1.6em", "1.61em", "1.62em", "1.63em", "1.64em", "1.64em", "1.65em"]
},
"Weibei TC": {
fontSizes: [21, 22, 23, 24, 25, 26, 27, 29, 32, 34, 39, 43],
lineHeights: ["1.65em", "1.63em", "1.62em", "1.61em", "1.6em", "1.6em", "1.61em", "1.62em", "1.63em", "1.64em", "1.64em", "1.65em"]
},
"Yuppy TC": {
lineHeights: ["1.75em", "1.73em", "1.7em", "1.67em", "1.65em", "1.6em", "1.63em", "1.65em", "1.68em", "1.7em", "1.71em", "1.72em"]
},
"Noto Nastaliq Urdu": {
lineHeights: ["2.6em", "2.7em", "2.8em", "2.8em", "2.8em", "2.8em", "2.8em", "2.6em", "2.5em", "2.5em", "2.5em", "2.6em"]
}
} [e];
return o || (o = {}), o.cssClassName = t(e), o.usesSystemFont || (o.fontFamilyName = e), o.fontSizes || (o.fontSizes = n), o.lineHeights || (o.lineHeights = i), o
}
function prepareTweetsInPrintingMailingFrame(e) {
let t = e.querySelectorAll(".tweet-wrapper");
for (let e of t) {
let t = e.querySelector("iframe");
t && t.remove();
let n = e.querySelector(".simple-tweet");
n && n.classList.remove("hidden")
}
}
function urlFromString(e) {
try {
return new URL(e)
} catch (e) {
return null
}
}
function stopExtendingElementBeyondTextColumn(e) {
e.classList.remove("extendsBeyondTextColumn"), e.style && (e.style.removeProperty("width"), e.style.removeProperty("-webkit-margin-start"))
}
function leadingMarginAndPaddingAppliedToElementFromAncestors(e) {
let t = 0,
n = e.parentElement;
for (; n && !n.classList.contains("page");) {
let e = getComputedStyle(n);
t += parseFloat(e["-webkit-padding-start"]) + parseFloat(e["-webkit-margin-start"]), n = n.parentElement
}
return t
}
function extendElementBeyondTextColumn(e, t, n) {
e.classList.add("extendsBeyondTextColumn"), e.style && (e.style.setProperty("width", t + "px"), e.style.setProperty("-webkit-margin-start", (n - t) / 2 - leadingMarginAndPaddingAppliedToElementFromAncestors(e) + "px"))
}
function monitorMouseDownForPotentialDeactivation(e) {
lastMouseDownWasOutsideOfPaper = e && ReaderAppearanceJS.usesPaperAppearance() && !document.getElementById("article").contains(e.target)
}
function deactivateIfEventIsOutsideOfPaperContainer(e) {
lastMouseDownWasOutsideOfPaper && e && ReaderAppearanceJS.usesPaperAppearance() && !document.getElementById("article").contains(e.target) && ReaderJSController.requestDeactivationFromUserAction()
}
function updatePageNumbers() {
let e = document.getElementsByClassName("page-number"),
t = e.length,
n = ReaderJS.isLoadingNextPage();
for (let i = 0; i < t; ++i) e[i].textContent = n ? getLocalizedString("Page %@").format(i + 1) : getLocalizedString("Page %@ of %@").format(i + 1, t)
}
function incomingPagePlaceholder() {
return document.getElementById("incoming-page-placeholder")
}
function addIncomingPagePlaceholder(e) {
let t = document.createElement("div");
t.className = "page", t.id = "incoming-page-placeholder";
let n = document.createElement("div");
n.id = "incoming-page-corner";
let i = document.createElement("div");
i.id = "incoming-page-text", i.innerText = getLocalizedString(e ? "Loading Next Page\u2026" : "Connect to the internet to view remaining pages."), n.appendChild(i), t.appendChild(n), document.getElementById("article").appendChild(t)
}
function removeIncomingPagePlaceholder() {
let e = incomingPagePlaceholder();
e.parentNode.removeChild(e)
}
function nextPageContainer() {
return document.getElementById("next-page-container")
}
function getLocalizedString(e) {
let t = localizedStrings[e];
return t || e
}
function nextPageLoadComplete() {
if (nextPageContainer().removeEventListener("load", nextPageLoadComplete, !1), ReaderJS.pageNumber++, ReaderJS.readerOperationMode == ReaderOperationMode.OffscreenFetching) {
let e = ReaderJS.pageURLs[ReaderJS.pageURLs.length - 1];
ReaderJSController.nextPageLoadComplete(ReaderJS.pageNumber, e, "next-page-container")
}
ReaderJSController.prepareNextPageFrame("next-page-container");
let e = ReaderJSController.nextPageArticleFinder();
e.pageNumber = ReaderJS.pageNumber, e.suggestedRouteToArticle = ReaderJS.routeToArticle, e.previouslyDiscoveredPageURLStrings = ReaderJS.pageURLs;
let t = e.adoptableArticle();
t && (ReaderJS.createPageFromNode(t), ReaderJS.routeToArticle = e.routeToArticleNode()), nextPageContainer().removeAttribute("src"), ReaderJSController.clearNextPageArticleFinder(), ReaderJS.canLoadNextPage() ? ReaderJS.setNextPageURL(e.nextPageURL()) : ReaderJS.setCachedNextPageURL(e.nextPageURL()), updatePageNumbers(), restoreInitialArticleScrollPositionIfPossible(), ReaderJS.isLoadingNextPage() || ReaderJS.doneLoadingAllPages()
}
function firstContentElementAfterTopOfViewport() {
let e, t = Number.MAX_VALUE;
const n = window.innerWidth / 2;
for (let i = 0; i <= 10; ++i) {
const o = document.elementFromPoint(n, 4 * i).closest("[data-reader-unique-id]");
if (!o) continue;
const r = o.offsetHeight;
r < t && (e = o, t = r)
}
if (e) return e;
let i = articleTitleElement();
if (!i) return null;
do {
if (i.getBoundingClientRect().bottom >= 0) return i
} while (i = nextReaderContentElement(i));
return null
}
function setConfiguration(e) {
ReaderAppearanceJS.applyConfiguration(e)
}
function setReaderIsActive(e) {
ReaderJS.setReaderIsActive(e)
}
function setArticleLocale(e) {
document.getElementById("article").style.webkitLocale = `'${e}'`, ReaderAppearanceJS.applyConfiguration(ReaderAppearanceJS.configuration)
}
function handleVisibilityChange() {
ReaderJS.setDocumentIsVisible(!document.hidden)
}
const LoadNextPageDelay = 250,
MaxNumberOfNextPagesToLoad = 80,
ReaderOperationMode = {
Normal: 0,
OffscreenFetching: 1,
ArchiveViewing: 2
},
LoadingMode = {
Normal: 0,
Reload: 1
},
DelayBeforeRestoringScrollPositionInMs = 1e3;
String.prototype.format = function() {
let e = this.split("%@");
for (let t = 0, n = arguments.length; t < n; ++t) e.splice(2 * t + 1, 0, arguments[t].toString());
return e.join("")
};
const debounceTimeoutSymbol = Symbol("debounce-timeout"),
debounceSoonProxySymbol = Symbol("debounce-soon-proxy");
Object.defineProperty(Object.prototype, "debounce", {
value(e) {
return new Proxy(this, {
get: (t, n) => (...i) => {
let o = t[n];
o[debounceTimeoutSymbol] && clearTimeout(o[debounceTimeoutSymbol]);
let r = () => {
o[debounceTimeoutSymbol] = void 0, o.apply(t, i)
};
o[debounceTimeoutSymbol] = setTimeout(r, e)
}
})
}
}), Object.defineProperty(Function.prototype, "cancelDebounce", {
value() {
this[debounceTimeoutSymbol] && (clearTimeout(this[debounceTimeoutSymbol]), this[debounceTimeoutSymbol] = void 0)
}
});
const AnimationTerminationCondition = {
Interrupted: 0,
CompletedSuccessfully: 1
};
AppleAnimator = function(e, t, n) {
this.startTime = 0, this.duration = e, this.interval = t, this.animations = [], this.animationFinishedCallback = n, this.currentFrameRequestID = null, this._firstTime = !0;
let i = this;
this.animate = function() {
function e(e, t, n) {
return e < t ? t : e > n ? n : e
}
let t, n, o, r = (new Date).getTime(),
a = i.duration;
t = e(r - i.startTime, 0, a), r = t / a, n = .5 - .5 * Math.cos(Math.PI * r), o = t >= a;
let l = i.animations,
s = l.length,
d = i._firstTime;
for (let e = 0; e < s; ++e) l[e].doFrame(i, n, d, o, r);
o ? i.stop(AnimationTerminationCondition.CompletedSuccessfully) : (i._firstTime = !1, this.currentFrameRequestID = requestAnimationFrame(i.animate))
}
}, AppleAnimator.prototype = {
start: function(e) {
let t = (new Date).getTime(),
n = this.interval;
this.startTime = t - n, e && (this.startTime += e), this.currentFrameRequestID = requestAnimationFrame(this.animate)
},
stop: function(e) {
this.animationFinishedCallback && this.animationFinishedCallback(e), this.currentFrameRequestID && cancelAnimationFrame(this.currentFrameRequestID)
},
addAnimation: function(e) {
this.animations[this.animations.length] = e
}
}, AppleAnimation = function(e, t, n) {
this.from = e, this.to = t, this.callback = n, this.now = e, this.ease = 0, this.progress = 0
}, AppleAnimation.prototype = {
doFrame: function(e, t, n, i, o) {
let r;
r = i ? this.to : this.from + (this.to - this.from) * t, this.now = r, this.ease = t, this.progress = o, this.callback(e, r, n, i)
}
};
let smoothScrollingAnimator, smoothScrollingAnimation, scrollEventIsSmoothScroll = !1;
window.addEventListener("scroll", articleScrolled, {
capture: !1,
passive: !0
});
const ContentAwareNavigationMarker = "reader-content-aware-navigation-marker",
ContentAwareNavigationAnimationDuration = 200,
ContentAwareNavigationElementOffset = 8,
ContentAwareNavigationDirection = {
Up: 0,
Down: 1
};
ContentAwareScroller = function() {
this._numberOfContentAwareScrollAnimationsInProgress = 0
}, ContentAwareScroller.prototype = {
_contentElementAtTopOfViewport: function() {
let e = articleTitleElement();
do {
if (!(e.getBoundingClientRect().top < ContentAwareNavigationElementOffset)) return e
} while (e = nextReaderContentElement(e));
return null
},
_clearTargetOfContentAwareScrolling: function() {
let e = document.getElementById(ContentAwareNavigationMarker);
e && e.removeAttribute("id")
},
_contentAwareScrollFinished: function(e) {
e === AnimationTerminationCondition.CompletedSuccessfully && (--this._numberOfContentAwareScrollAnimationsInProgress, this._numberOfContentAwareScrollAnimationsInProgress || (smoothScrollingAnimator = null, smoothScrollingAnimation = null, this._clearTargetOfContentAwareScrolling()))
},
scroll: function(e) {
let t, n, i = document.getElementById(ContentAwareNavigationMarker),
o = i || this._contentElementAtTopOfViewport();
if (e === ContentAwareNavigationDirection.Down) {
let e = Math.abs(o.getBoundingClientRect().top - ContentAwareNavigationElementOffset) < 1;
t = i || e ? nextReaderContentElement(o) : o
} else if (e === ContentAwareNavigationDirection.Up)
if (o === articleTitleElement()) {
if (0 === document.scrollingElement.scrollTop) return;
n = -1 * document.scrollingElement.scrollTop
} else t = previousReaderContentElement(o);
t && (n = t.getBoundingClientRect().top - ContentAwareNavigationElementOffset), ++this._numberOfContentAwareScrollAnimationsInProgress, smoothScroll(document.scrollingElement, n, ContentAwareNavigationAnimationDuration, this._contentAwareScrollFinished.bind(this)), this._clearTargetOfContentAwareScrolling(), t && (t.id = ContentAwareNavigationMarker)
}
}, window.addEventListener("keydown", keyDown, !1);
let initialScrollPosition, didRestoreInitialScrollPosition = !1;
const ThemeSettings = {
White: {
cssClassName: "white"
},
Gray: {
cssClassName: "gray",
tweetTheme: "dark"
},
Sepia: {
cssClassName: "sepia"
},
Night: {
cssClassName: "night",
tweetTheme: "dark"
}
},
ShouldRestoreReadingPosition = {
No: !1,
Yes: !0
},
MinTextZoomIndex = 0,
MaxTextZoomIndex = 11,
MaximumWidthOfImageOrVideoExtendingBeyondTextContainer = 1050,
ReaderConfigurationJavaScriptEnabledKey = "javaScriptEnabled";
ReaderAppearanceController = function() {
this._shouldUsePaperAppearance = function() {
const e = 70;
return this.articleWidth() + 2 * e < this.documentElementWidth()
}, this._isOLEDDisplay = function() {
return !1
}, this._tryApplyStaticConfiguration = function() {
return !1
}, this._defaultFontFamilyName = "System", this._defaultThemeName = "White", this.configuration = {}, this._textSizeIndex = null, this._fontFamilyName = this._defaultFontFamilyName, this._themeName = this._defaultThemeName
}, ReaderAppearanceController.prototype = {
initialize: function() {
this.applyConfiguration(ReaderJSController.initialConfiguration()), this._isOLEDDisplay() && document.body.classList.add("oled")
},
applyConfiguration: function(e) {
if (this._tryApplyStaticConfiguration()) return void this.layOutContent();
let t = this._locale();
this.setLocale(t);
for (let n of [e.fontFamilyNameForLanguageTag[t], e.defaultFontFamilyNameForLanguage[t], "System"])
if (n && this.setFontFamily(n)) break;
for (let t of [e.themeName, "White"])
if (t && this.setTheme(t)) break;
this.setCurrentTextSizeIndex(e.fontSizeIndex), this.configuration = e, this.layOutContent()
},
articleWidth: function() {
return document.getElementById("article").getBoundingClientRect().width
},
_textColumnWidthInPoints: function() {
return parseFloat(getComputedStyle(document.querySelector("#article .page")).width)
},
documentElementWidth: function() {
return document.documentElement.clientWidth
},
setCurrentTextSizeIndex: function(e) {
this._textSizeIndex = e, this._rebuildDynamicStyleSheet()
},
currentFontCSSClassName: function() {
return this._currentFontSettings().cssClassName
},
currentFontCSSFontFamilyName: function() {
return this._currentFontSettings().fontFamilyName
},
currentFontUsesSystemFont: function() {
return this._currentFontSettings().usesSystemFont
},
_currentFontSettings: function() {
return fontSettings(this._fontFamilyName)
},
setLocale: function(e) {
if (e === this._lastSetLocale) return;
let t = document.body.classList;
const n = "locale-";
t.remove(n + this._lastSetLocale), t.add(n + e), this._lastSetLocale = e
},
setFontFamily: function(e) {
let t = document.body,
n = fontSettings(e);
if (!n) return !1;
if (this._fontFamilyName) {
let e = fontSettings(this._fontFamilyName);
t.classList.remove(e.cssClassName), t.style.fontFamily = null, e.usesSystemFont && t.classList.remove("system")
}
return "function" == typeof ReaderJSController.makeFontAvailableIfNecessary && ReaderJSController.makeFontAvailableIfNecessary(e), t.classList.add(n.cssClassName), n.fontFamilyName && (t.style.fontFamily = n.fontFamilyName), n.usesSystemFont && t.classList.add("system"), this._fontFamilyName = e, !0
},
_theme: function() {
return ThemeSettings[this._themeName]
},
setTheme: function(e) {
let t = document.body,
n = ThemeSettings[e];
return !!n && (t.classList.contains(n.cssClassName) || (this._theme() && t.classList.remove(this._theme().cssClassName), t.classList.add(n.cssClassName), this._themeName = e), !0)
},
usesPaperAppearance: function() {
return document.documentElement.classList.contains("paper")
},
layOutContent: function(e = ShouldRestoreReadingPosition.Yes) {
document.querySelector("#article .page") && (this._shouldUsePaperAppearance() ? document.documentElement.classList.add("paper") : document.documentElement.classList.remove("paper"), makeWideElementsScrollable(), this._layOutImagesAndVideoElementsBeyondTextColumn(), this._layOutElementsContainingTextBeyondTextColumn(), this._layOutVideos(), this._layOutMetadataBlock(), e === ShouldRestoreReadingPosition.Yes && ReadingPositionStabilizerJS.restorePosition())
},
_layOutMetadataBlock: function() {
let e = document.querySelector(".metadata");
if (!e) return;
let t = e.querySelector(".byline"),
n = e.querySelector(".date");
if (!t || !n) return void e.classList.add("singleline");
let i = 0;
for (let e of t.getClientRects()) i += e.width;
for (let e of n.getClientRects()) i += e.width;
i + 25 > this._textColumnWidthInPoints() ? e.classList.remove("singleline") : e.classList.add("singleline")
},
_layOutImagesAndVideoElementsBeyondTextColumn: function() {
let e = this.canLayOutContentMaintainingAspectRatioBeyondTextColumn(),
t = document.getElementById("article").querySelectorAll("img, video");
for (let n of t) this.setImageOrVideoShouldLayOutBeyondTextColumnIfAppropriate(n, e)
},
_layOutElementsContainingTextBeyondTextColumn: function() {
const e = {
PRE: !0,
TABLE: !1
},
t = 22;
let n = document.querySelectorAll(".scrollable pre, .scrollable table");
for (let i of n) {
let n = i.parentElement;
for (let e = n; e; e = e.parentElement) "BLOCKQUOTE" === e.tagName && e.classList.add("simple");
stopExtendingElementBeyondTextColumn(n);
let o = i.scrollWidth,
r = this._textColumnWidthInPoints();
if (o <= r) continue;
let a = getComputedStyle(document.querySelector(".page")),
l = 0;
if (e[i.tagName]) {
let e = parseFloat(a["-webkit-padding-start"]) + parseFloat(a["-webkit-margin-start"]);
l = Math.min(e, t)
}
extendElementBeyondTextColumn(n, Math.min(o, this._widthAvailableForLayout() - 2 * l), r)
}
},
_layOutVideos: function() {
function e(e) {
return e.src && /^(.+\.)?(youtube(-nocookie)?|vimeo)\.com\.?$/.test(urlFromString(e.src).hostname)
}
const t = 16 / 9;
let n, i, o = ReaderAppearanceJS.canLayOutContentMaintainingAspectRatioBeyondTextColumn();
for (let r of document.getElementById("article").querySelectorAll("iframe")) {
const a = r.parentElement.classList.contains("iframe-wrapper");
if (!a && !e(r)) continue;
let l;
if (a ? l = r.parentElement : (l = document.createElement("div"), l.className = "iframe-wrapper", r.nextSibling ? r.parentNode.insertBefore(l, r.nextSibling) : r.parentNode.appendChild(l), l.appendChild(r)), n || (n = Math.min(MaximumWidthOfImageOrVideoExtendingBeyondTextContainer, this._widthAvailableForLayout())), i || (i = this._textColumnWidthInPoints()), o && n > i) {
l.style.height = n / t + "px", extendElementBeyondTextColumn(l, n, i), r.style.height = "100%";
let e = this.usesPaperAppearance() ? 2 : 0;
r.style.width = n - e + "px"
} else stopExtendingElementBeyondTextColumn(l), l.style.width = "100%", l.style.height = i / t + "px"
}
},
canLayOutContentMaintainingAspectRatioBeyondTextColumn: function() {
const e = 700;
if (window.innerHeight >= e) return !0;
const t = 1.25;
return window.innerWidth / window.innerHeight <= t
},
setImageOrVideoShouldLayOutBeyondTextColumnIfAppropriate: function(e, t) {
if (t && !e.closest("blockquote, table, .float")) {
let t, n = this._textColumnWidthInPoints(),
i = parseFloat(e.getAttribute("width"));
t = isNaN(i) ? e.naturalWidth : i;
let o = Math.min(t, Math.min(MaximumWidthOfImageOrVideoExtendingBeyondTextContainer, this._widthAvailableForLayout()));
if (o > n) return void extendElementBeyondTextColumn(e, o, n)
}
stopExtendingElementBeyondTextColumn(e)
},
_widthAvailableForLayout: function() {
return this.usesPaperAppearance() ? this.articleWidth() : this.documentElementWidth()
},
_rebuildDynamicStyleSheet: function() {
let e = document.getElementById("dynamic-article-content").sheet;
for (; e.cssRules.length;) e.removeRule(0);
let t = this._currentFontSettings().fontSizes[this._textSizeIndex] + "px",
n = this._currentFontSettings().lineHeights[this._textSizeIndex];
e.insertRule("#article { font-size: " + t + "; line-height: " + n + "; }")
},
_locale: function() {
let e = document.getElementById("article").style.webkitLocale;
return e && e.length ? '"' != e[0] ? e : e.substr(1, e.length - 2) : ""
}
};
let lastMouseDownWasOutsideOfPaper = !1;
ReaderController = function() {
this.pageNumber = 1, this.pageURLs = [], this.articleIsLTR = !0, this.loadingNextPage = !1, this.loadingNextPageManuallyStopped = !1, this.cachedNextPageURL = null, this.lastKnownDocumentElementWidth = 0, this._readerWillBecomeVisible = function() {}, this._readerWillEnterBackground = function() {}, this._distanceFromBottomOfArticleToStartLoadingNextPage = function() {
return NaN
}, this._clickingOutsideOfPaperRectangleDismissesReader = !1, this._shouldSkipActivationWhenPageLoads = function() {
return !1
}, this._shouldConvertRelativeURLsToAbsoluteURLsWhenPrintingOrMailing = !1, this._deferSendingContentIsReadyForDisplay = !1, this._isJavaScriptEnabled = function() {
return !0
}, this._readerIsActive = !0, this._documentIsVisible = !document.hidden
}, ReaderController.prototype = {
setOriginalURL: function(e) {
this.originalURL = e, this.pageURLs.push(e), document.head.getElementsByTagName("base")[0].href = this.originalURL, ReaderJSController.setArticleBaseURLString(e)
},
setNextPageURL: function(e) {
if (!e || -1 !== this.pageURLs.indexOf(e) || this.pageNumber + 1 === MaxNumberOfNextPagesToLoad) return void this.setLoadingNextPage(!1);
this.setLoadingNextPage(!0), this.pageURLs.push(e);
let t = function() {
nextPageContainer().addEventListener("load", nextPageLoadComplete, !1), nextPageContainer().src = e
};
this.readerOperationMode == ReaderOperationMode.OffscreenFetching ? t() : this.nextPageLoadTimer = setTimeout(t, LoadNextPageDelay)
},
pauseLoadingNextPage: function() {
this.readerOperationMode == ReaderOperationMode.Normal && (nextPageContainer().removeEventListener("load", nextPageLoadComplete, !1), this.cachedNextPageURL || (this.cachedNextPageURL = this.pageURLs.pop()), nextPageContainer().src = null, this.nextPageLoadTimer && clearTimeout(this.nextPageLoadTimer), ReaderJSController.didChangeNextPageLoadingState(!1))
},
stopLoadingNextPage: function() {
nextPageContainer().removeEventListener("load", nextPageLoadComplete, !1), nextPageContainer().src = null, this.nextPageLoadTimer && clearTimeout(this.nextPageLoadTimer), this.isLoadingNextPage() && (this.setLoadingNextPage(!1), this.loadingNextPageManuallyStopped = !0)
},
isLoadingNextPage: function() {
return this.loadingNextPage
},
setLoadingNextPage: function(e) {
this.loadingNextPage != e && (e ? addIncomingPagePlaceholder(window.navigator.onLine) : removeIncomingPagePlaceholder(), this.loadingNextPage = e, ReaderJSController.didChangeNextPageLoadingState(this.loadingNextPage))
},
doneLoadingAllPages: function() {
ReaderJSController.doneLoadingReaderPage()
},
loaded: function() {
this.readerOperationMode = ReaderJSController.readerOperationMode();
const e = ReaderJSController.originalArticleFinder();
if (!e || this._shouldSkipActivationWhenPageLoads()) return void ReaderJSController.deactivateNow();
this.loadArticle();
let t = ReaderJSController.cachedTopScrollOffset();
t > 0 ? document.scrollingElement.scrollTop = t : requestAnimationFrame((function() {
ReadingPositionStabilizerJS.applyScrollPositionFromOriginalPage()
})), ReadingPositionStabilizerJS.initialize(), this._clickingOutsideOfPaperRectangleDismissesReader && (document.documentElement.addEventListener("mousedown", monitorMouseDownForPotentialDeactivation), document.documentElement.addEventListener("click", deactivateIfEventIsOutsideOfPaperContainer)), window.addEventListener("resize", this.windowDidResize.bind(this), !1);
var n = "",
i = e.articleTitle();
i && (n += i + " \n");
var o = e.articleSubhead();
o && (n += o + " \n");
let r = n + e.adoptableArticle().textContent;
r = r.toString().replace(/(<([^>]+)>)/gi, "");
let a = function() {
ReaderJSController.contentIsReadyForDisplay(r)
};
this._deferSendingContentIsReadyForDisplay ? setTimeout(a, 0) : a()
},
windowDidResize: function() {
let e = ReaderAppearanceJS.documentElementWidth();
e !== this.lastKnownDocumentElementWidth && (this.lastKnownDocumentElementWidth = e, ReaderAppearanceJS.layOutContent(), ReadingPositionStabilizerJS.windowDidResize())
},
loadArticle: function(e = LoadingMode.Normal) {
const t = ReaderJSController.originalArticleFinder();
if (t.article || t.articleNode(!0), !t.article) return this.setOriginalURL(t.contentDocument.baseURI), void this.doneLoadingAllPages();
this.routeToArticle = t.routeToArticleNode(), this.displayTitleInformation = t.articleTitleInformation(), this._snapshotOfArticleTitle = t.articleTitle(), this.displaySubhead = t.articleSubhead(), this.metadataElement = t.adoptableMetadataBlock(), this.articleIsLTR = t.articleIsLTR();
const n = t.articleNode();
this._heightOfArticleNodeOnOriginalPage = n.getBoundingClientRect().height;
let i = t.adoptableArticle();
this._snapshotOfAdoptableArticle = i.cloneNode(!0);
let o, r = i.ownerDocument;
if (document.title = r.title, this.setOriginalURL(r.baseURI), this.readerOperationMode != ReaderOperationMode.ArchiveViewing) {
if (this._isJavaScriptEnabled()) o = t.nextPageURL(), this.setNextPageURL(o);
else {
for (let e of i.querySelectorAll("iframe")) e.remove();
this.stopLoadingNextPage()
}
e !== LoadingMode.Reload && ReaderAppearanceJS.initialize(), this.createPageFromNode(i), o || (t.adoptableMultiPageContentElements().forEach(this.createPageFromNode, this), updatePageNumbers()), this.isLoadingNextPage() || this.doneLoadingAllPages(), e === LoadingMode.Reload && setTimeout((function() {
ReadingPositionStabilizerJS.contentWasReloaded()
}), 0)
} else ReaderAppearanceJS.layOutContent()
},
reloadArticlePreservingScrollPositionIfArticleNodeContentHasChanged: function() {
const e = ReaderJSController.originalArticleFinder();
if (!e) return;
const t = e.documentURLString(),
n = 30;
for (const e of document.querySelectorAll("audio, video"))
if (mediaElementIsPlaying(e)) return;
const i = e.articleNode();
if (!i) return;
if (i.getBoundingClientRect().height < this._heightOfArticleNodeOnOriginalPage - n) return;
if (this.originalURL !== t) return;
e.reset();
const o = e.articleNode();
if (i !== o && !o.contains(i)) return;
const r = e.adoptableArticle();
if (this._adoptableArticlesAreUserVisiblyEquivalent(this._snapshotOfAdoptableArticle, r)) return;
const a = e.articleTitle();
this._snapshotOfArticleTitle === a && this.reloadArticlePreservingScrollPosition()
},
_adoptableArticlesAreUserVisiblyEquivalent: function(e, t) {
function n(e, t) {
let o = e.nodeType;
if (o !== t.nodeType) return !1;
switch (o) {
case Node.ELEMENT_NODE:
if (e.tagName !== t.tagName) return !1;
let n = e.attributes;
if (n.length !== t.attributes.length) return !1;
let o = t.attributes;
for (let e of n)
if (e.name !== i && e.value !== o[e.name].value) return !1;
break;
case Node.TEXT_NODE:
case Node.COMMENT_NODE:
if (e.data !== t.data) return !1;
break;
default:
return !1
}
let r = e.firstChild,
a = t.firstChild;
for (; r;) {
if (!n(r, a)) return !1;
r = r.nextSibling, a = a.nextSibling
}
return !a
}
const i = ReaderJSController.originalArticleFinder().elementReaderUniqueIDAttributeKey();
return n(e, t)
},
reloadArticlePreservingScrollPosition: function() {
this._reloadArticleAndPreserveScrollPosition(!0)
},
loadNewArticle: function() {
this._reloadArticleAndPreserveScrollPosition(!1)
},
_reloadArticleAndPreserveScrollPosition: function(e) {
if (!ReaderJSController.originalArticleFinder()) return void ReaderJSController.deactivateNow();
ReadingPositionStabilizerJS.setTrackPosition(!1);
const [t, n] = [scrollX, scrollY], [i, o] = ReadingPositionStabilizerJS.uniqueIDAndScrollRatioOfElementPinnedToTop();
let r = document.getElementById("article");
for (r.style.minHeight = r.getBoundingClientRect().height + "px"; r.childNodes.length >= 1;) r.removeChild(r.firstChild);
if (this.reinitialize(), e || (document.scrollingElement.scrollTop = 0), this.loadArticle(LoadingMode.Reload), e) {
let e;
i && (e = ReadingPositionStabilizerJS.tryToScrollToUniqueIDAndRatio(i, o)), e || scrollTo(t, n)
}
ReadingPositionStabilizerJS.setTrackPosition(!0), setTimeout((function() {
r.style.minHeight = null
}), 0)
},
reinitialize: function() {
this.pageNumber = 1, this.pageURLs = [], this.articleIsLTR = !0, this.loadingNextPage = !1, this.loadingNextPageManuallyStopped = !1, this.routeToArticle = void 0, this.displayTitleInformation = void 0, this.displaySubhead = void 0, this.originalURL = void 0, this.nextPageLoadTimer = void 0, this.readerOperationMode = ReaderJSController.readerOperationMode(), this.cachedNextPageURL = null
},
createPageFromNode: function(e) {
const t = ReaderJSController.originalArticleFinder();
let n = document.createElement("div");
n.className = "page", this.articleIsLTR || n.classList.add("rtl");
let i = document.createElement("div");
i.className = "page-number", n.appendChild(i);
let o = this.displayTitleInformation,
r = document.createElement("h1");
if (r.className = "title", r.textContent = o.titleText, o.linkURL && o.linkIsForExternalPage) {
let e = document.createElement("a");
e.href = o.linkURL, o.linkIsTargetBlank && e.setAttribute("target", "_blank"), e.appendChild(r), r = e
}
const a = t.elementReaderUniqueIDAttributeKey();
if (r.setAttribute(a, t.titleUniqueID()), n.appendChild(r), this.displaySubhead) {
let e = document.createElement("h2");
e.className = "subhead", e.textContent = this.displaySubhead, e.setAttribute(a, t.subheadUniqueID()), n.appendChild(e)
}
if (this.metadataElement && this.metadataElement.innerText) {
let e = document.createElement("div");
for (e.className = "metadata"; this.metadataElement.firstChild;) e.appendChild(this.metadataElement.firstChild);
n.appendChild(e)
}
let l = e.tagName;
if ("PRE" === l || "CODE" === l) n.appendChild(e);
else
for (; e.firstChild;) n.appendChild(e.firstChild);
document.getElementById("article").insertBefore(n, incomingPagePlaceholder()), ReaderJS._isJavaScriptEnabled() && ReaderJSController.replaceSimpleTweetsWithRichTweets(this.optionsForTweetCreation()), ReaderAppearanceJS.layOutContent(ShouldRestoreReadingPosition.No), updatePageNumbers(), restoreInitialArticleScrollPositionIfPossible();
for (let e of n.querySelectorAll("img")) e.onload = function(e) {
let t = e.target;
ReaderAppearanceJS.setImageOrVideoShouldLayOutBeyondTextColumnIfAppropriate(t, ReaderAppearanceJS.canLayOutContentMaintainingAspectRatioBeyondTextColumn()), t.onload = null
};
this._fixImageElementsWithinPictureElements()
},
optionsForTweetCreation: function() {
let e = {
dnt: !0
},
t = ReaderAppearanceJS._theme();
return t && t.tweetTheme && (e.theme = t.tweetTheme), e
},
removeAttribute: function(e, t) {
let n = e.querySelectorAll("[" + t + "]");
for (let e of n) e.removeAttribute(t)
},
preparePrintingMailingFrame: function() {
let e = this.printingMailingFrameElementId(),
t = document.getElementById(e);
t && document.body.removeChild(t), t = this.sanitizedFullArticleFrame(), t.id = e
},
sanitizedFullArticleFrame: function() {
let e = document.createElement("iframe");
e.style.display = "none", e.style.position = "absolute", document.body.appendChild(e);
let t = e.contentDocument,
n = document.createElement("base");
n.href = this.originalURL, t.head.appendChild(n);
let i = document.createElement("div");
i.className = "original-url";
let o = document.createElement("a");
o.href = this.originalURL, o.textContent = this.originalURL, i.appendChild(document.createElement("br")), i.appendChild(o), i.appendChild(document.createElement("br")), i.appendChild(document.createElement("br")), t.body.appendChild(i), t.body.appendChild(this.sanitizedFullArticle()), t.head.appendChild(document.getElementById("print").cloneNode(!0));
let r = t.createElement("title");
return r.innerText = document.title, t.head.appendChild(r), e
},
sanitizedFullArticle: function() {
let e = document.getElementById("article").cloneNode(!0);
e.removeAttribute("tabindex");
const t = e.querySelectorAll(".title");
for (let e = 1, n = t.length; e < n; ++e) t[e].remove();
for (let t of e.querySelectorAll(".page-number, #incoming-page-placeholder")) t.remove();
if (prepareTweetsInPrintingMailingFrame(e), this._shouldConvertRelativeURLsToAbsoluteURLsWhenPrintingOrMailing) {
const t = /^http:\/\/|^https:\/\/|^data:/i;
let n = e.querySelectorAll("img, video, audio, source");
for (let e of n) {
let n = e.getAttribute("src");
t.test(n) || e.setAttribute("src", e.src)
}
}
for (let t of e.querySelectorAll(".extendsBeyondTextColumn")) stopExtendingElementBeyondTextColumn(t);
for (let t of e.querySelectorAll(".delimeter")) t.innerText = "\u2022";
e.classList.add(ReaderAppearanceJS.currentFontCSSClassName());
let n = ReaderAppearanceJS.currentFontCSSFontFamilyName();
n && (e.style.fontFamily = n), ReaderAppearanceJS.currentFontUsesSystemFont() && e.classList.add("system"), e.classList.add("exported");
const i = ReaderJSController.originalArticleFinder().elementReaderUniqueIDAttributeKey();
for (let t of e.getElementsByTagName("*")) t.removeAttribute(i);
let o = document.getElementById("article-content").sheet.cssRules,
r = o.length;
for (let t = 0; t < r; ++t) {
let n = o[t].selectorText,
i = o[t].style;
if (!i) continue;
let r = i.cssText;
e.matches(n) && e.style && (e.style.cssText += r);
for (let t of e.querySelectorAll(n)) t.style && (t.style.cssText += r)
}
return e
},
printingMailingFrameElementId: function() {
return "printing-mailing-frame"
},
canLoadNextPage: function() {
if (this.readerOperationMode != ReaderOperationMode.Normal) return !0;
let e = document.querySelectorAll(".page"),
t = e[e.length - 1].getBoundingClientRect(),
n = this._distanceFromBottomOfArticleToStartLoadingNextPage();
return !!isNaN(n) || !(t.bottom - window.scrollY > n)
},
setCachedNextPageURL: function(e) {
e ? (this.cachedNextPageURL = e, ReaderJSController.didChangeNextPageLoadingState(!1)) : this.setNextPageURL(e)
},
loadNextPage: function() {
null != this.cachedNextPageURL && (this.setNextPageURL(this.cachedNextPageURL), this.cachedNextPageURL = null, ReaderJSController.didChangeNextPageLoadingState(!0))
},
resumeCachedNextPageLoadIfNecessary: function() {
ReaderJS.cachedNextPageURL && ReaderJS.canLoadNextPage() && ReaderJS.loadNextPage()
},
setDocumentIsVisible: function(e) {
this._documentIsVisible = e, this._readerForegroundednessMayHaveChanged(), e && ReaderAppearanceJS.layOutContent()
},
setReaderIsActive: function(e) {
this._readerIsActive = e, this._readerForegroundednessMayHaveChanged()
},
readerIsForeground: function() {
return this._documentIsVisible && this._readerIsActive
},
_readerForegroundednessMayHaveChanged: function() {
let e = this.readerIsForeground();
this._readerIsForeground !== e && (e ? this.readerWillBecomeVisible() : this.readerWillEnterBackground(), ReadingPositionStabilizerJS.setTrackPosition(e), this._readerIsForeground = e)
},
readerWillBecomeVisible: function() {
document.body.classList.remove("cached"), this.resumeCachedNextPageLoadIfNecessary(), this._readerWillBecomeVisible(), this._readerIsActive && requestAnimationFrame((function() {
ReadingPositionStabilizerJS.applyScrollPositionFromOriginalPage()
}))
},
readerWillEnterBackground: function() {
(ReaderJS.isLoadingNextPage() || ReaderJS.loadingNextPageManuallyStopped) && this.pauseLoadingNextPage();
for (let e of document.querySelectorAll("audio")) e.pause();
for (let e of document.querySelectorAll("video")) e.hasAttribute("data-reader-silent-looped-animation") || e.pause();
this._readerWillEnterBackground()
},
_fixImageElementsWithinPictureElements: function() {
requestAnimationFrame((function() {
let e = !1,
t = document.querySelectorAll("#article picture img");
for (let n of t) {
let t = n.previousElementSibling;
if (t) n.remove(), t.after(n), e = !0;
else {
let t = n.parentElement;
n.remove(), t.appendChild(n), e = !0
}
}
e && ReaderAppearanceJS.layOutContent()
}))
}
}, ReadingPositionStabilizer = function() {
this.elementTouchingTopOfViewport = null, this.elementTouchingTopOfViewportOffsetFromTopOfElementRatio = 0, this._trackingScrolling = !1, this._hasEverScrolled = !1
}, ReadingPositionStabilizer.prototype = {
initialize: function() {
this.setTrackPosition(!0);
const e = 250;
this._checkForUpdatedContentSoon = this.debounce(e)._checkForUpdatedContentNow, this.windowDidResize = this.debounce(e)._windowDidResize
},
setTrackPosition: function(e) {
if (e === this._trackingScrolling) return;
this._trackingScrolling = e;
const t = 250;
this._debouncedDidScroll || (this._debouncedDidScroll = this.debounce(t)._didScroll), e ? window.addEventListener("scroll", this._debouncedDidScroll, {
capture: !1,
passive: !0
}) : window.removeEventListener("scroll", this._debouncedDidScroll, {
capture: !1,
passive: !0
})
},
_windowDidResize: function() {
this._hasEverScrolled && this._updatePosition(!1)
},
contentWasReloaded: function() {
this._updatePosition(!1)
},
_didScroll: function() {
this._trackingScrolling && (this._hasEverScrolled = !0, this._updatePosition(!1))
},
_updatePosition: function(e = !0) {
let t = firstContentElementAfterTopOfViewport();
if (!t) return void(this.elementTouchingTopOfViewport = null);
this.elementTouchingTopOfViewport = t;
let n = this.elementTouchingTopOfViewport.getBoundingClientRect();
this.elementTouchingTopOfViewportOffsetFromTopOfElementRatio = n.height > 0 ? n.top / n.height : 0, this._originalPageScrollSyncAndContentRefreshIsAllowed() && ReaderJS.readerIsForeground() && (this._pushScrollPositionToOriginalPage(), e && this._checkForUpdatedContentSoon())
},