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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
commit6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
treea68f146d7fa01f0134297619fbe7e33db084e0aa /browser/actors/AboutReaderChild.sys.mjs
parentInitial commit. (diff)
downloadthunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz
thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'browser/actors/AboutReaderChild.sys.mjs')
-rw-r--r--browser/actors/AboutReaderChild.sys.mjs252
1 files changed, 252 insertions, 0 deletions
diff --git a/browser/actors/AboutReaderChild.sys.mjs b/browser/actors/AboutReaderChild.sys.mjs
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+/* vim: set ts=2 sw=2 sts=2 et tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+ AboutReader: "resource://gre/modules/AboutReader.sys.mjs",
+ ReaderMode: "resource://gre/modules/ReaderMode.sys.mjs",
+ Readerable: "resource://gre/modules/Readerable.sys.mjs",
+});
+
+var gUrlsToDocContentType = new Map();
+var gUrlsToDocTitle = new Map();
+
+export class AboutReaderChild extends JSWindowActorChild {
+ constructor() {
+ super();
+
+ this._reader = null;
+ this._articlePromise = null;
+ this._isLeavingReaderableReaderMode = false;
+ }
+
+ didDestroy() {
+ this.cancelPotentialPendingReadabilityCheck();
+ this.readerModeHidden();
+ }
+
+ readerModeHidden() {
+ if (this._reader) {
+ this._reader.clearActor();
+ }
+ this._reader = null;
+ }
+
+ async receiveMessage(message) {
+ switch (message.name) {
+ case "Reader:ToggleReaderMode":
+ if (!this.isAboutReader) {
+ gUrlsToDocContentType.set(
+ this.document.URL,
+ this.document.contentType
+ );
+ gUrlsToDocTitle.set(this.document.URL, this.document.title);
+ this._articlePromise = lazy.ReaderMode.parseDocument(
+ this.document
+ ).catch(console.error);
+
+ // Get the article data and cache it in the parent process. The reader mode
+ // page will retrieve it when it has loaded.
+ let article = await this._articlePromise;
+ this.sendAsyncMessage("Reader:EnterReaderMode", article);
+ } else {
+ this.closeReaderMode();
+ }
+ break;
+
+ case "Reader:PushState":
+ this.updateReaderButton(!!(message.data && message.data.isArticle));
+ break;
+ case "Reader:EnterReaderMode": {
+ lazy.ReaderMode.enterReaderMode(this.docShell, this.contentWindow);
+ break;
+ }
+ case "Reader:LeaveReaderMode": {
+ lazy.ReaderMode.leaveReaderMode(this.docShell, this.contentWindow);
+ break;
+ }
+ }
+
+ // Forward the message to the reader if it has been created.
+ if (this._reader) {
+ this._reader.receiveMessage(message);
+ }
+ }
+
+ get isAboutReader() {
+ if (!this.document) {
+ return false;
+ }
+ return this.document.documentURI.startsWith("about:reader");
+ }
+
+ get isReaderableAboutReader() {
+ return this.isAboutReader && !this.document.documentElement.dataset.isError;
+ }
+
+ handleEvent(aEvent) {
+ if (aEvent.originalTarget.defaultView != this.contentWindow) {
+ return;
+ }
+
+ switch (aEvent.type) {
+ case "DOMContentLoaded":
+ if (!this.isAboutReader) {
+ this.updateReaderButton();
+ return;
+ }
+
+ if (this.document.body) {
+ let url = this.document.documentURI;
+ if (!this._articlePromise) {
+ url = decodeURIComponent(url.substr("about:reader?url=".length));
+ this._articlePromise = this.sendQuery("Reader:GetCachedArticle", {
+ url,
+ });
+ }
+ // Update the toolbar icon to show the "reader active" icon.
+ this.sendAsyncMessage("Reader:UpdateReaderButton");
+ let docContentType =
+ gUrlsToDocContentType.get(url) === "text/plain"
+ ? "text/plain"
+ : "document";
+
+ let docTitle = gUrlsToDocTitle.get(url);
+ this._reader = new lazy.AboutReader(
+ this,
+ this._articlePromise,
+ docContentType,
+ docTitle
+ );
+ this._articlePromise = null;
+ }
+ break;
+
+ case "pagehide":
+ this.cancelPotentialPendingReadabilityCheck();
+ // this._isLeavingReaderableReaderMode is used here to keep the Reader Mode icon
+ // visible in the location bar when transitioning from reader-mode page
+ // back to the readable source page.
+ this.sendAsyncMessage("Reader:UpdateReaderButton", {
+ isArticle: this._isLeavingReaderableReaderMode,
+ });
+ this._isLeavingReaderableReaderMode = false;
+ break;
+
+ case "pageshow":
+ // If a page is loaded from the bfcache, we won't get a "DOMContentLoaded"
+ // event, so we need to rely on "pageshow" in this case.
+ if (aEvent.persisted && this.canDoReadabilityCheck()) {
+ this.performReadabilityCheckNow();
+ }
+ break;
+ }
+ }
+
+ /**
+ * NB: this function will update the state of the reader button asynchronously
+ * after the next mozAfterPaint call (assuming reader mode is enabled and
+ * this is a suitable document). Calling it on things which won't be
+ * painted is not going to work.
+ */
+ updateReaderButton(forceNonArticle) {
+ if (!this.canDoReadabilityCheck()) {
+ return;
+ }
+
+ this.scheduleReadabilityCheckPostPaint(forceNonArticle);
+ }
+
+ canDoReadabilityCheck() {
+ return (
+ lazy.Readerable.isEnabledForParseOnLoad &&
+ !this.isAboutReader &&
+ this.contentWindow &&
+ this.contentWindow.windowRoot &&
+ this.contentWindow.HTMLDocument.isInstance(this.document) &&
+ !this.document.mozSyntheticDocument
+ );
+ }
+
+ cancelPotentialPendingReadabilityCheck() {
+ if (this._pendingReadabilityCheck) {
+ if (this._listenerWindow) {
+ this._listenerWindow.removeEventListener(
+ "MozAfterPaint",
+ this._pendingReadabilityCheck
+ );
+ }
+ delete this._pendingReadabilityCheck;
+ delete this._listenerWindow;
+ }
+ }
+
+ scheduleReadabilityCheckPostPaint(forceNonArticle) {
+ if (this._pendingReadabilityCheck) {
+ // We need to stop this check before we re-add one because we don't know
+ // if forceNonArticle was true or false last time.
+ this.cancelPotentialPendingReadabilityCheck();
+ }
+ this._pendingReadabilityCheck = this.onPaintWhenWaitedFor.bind(
+ this,
+ forceNonArticle
+ );
+
+ this._listenerWindow = this.contentWindow.windowRoot;
+ this.contentWindow.windowRoot.addEventListener(
+ "MozAfterPaint",
+ this._pendingReadabilityCheck
+ );
+ }
+
+ onPaintWhenWaitedFor(forceNonArticle, event) {
+ // In non-e10s, we'll get called for paints other than ours, and so it's
+ // possible that this page hasn't been laid out yet, in which case we
+ // should wait until we get an event that does relate to our layout. We
+ // determine whether any of our this.contentWindow got painted by checking
+ // if there are any painted rects.
+ if (!event.clientRects.length) {
+ return;
+ }
+
+ this.performReadabilityCheckNow(forceNonArticle);
+ }
+
+ performReadabilityCheckNow(forceNonArticle) {
+ this.cancelPotentialPendingReadabilityCheck();
+
+ // Ignore errors from actors that have been unloaded before the
+ // paint event timer fires.
+ let document;
+ try {
+ document = this.document;
+ } catch (ex) {
+ return;
+ }
+
+ // Only send updates when there are articles; there's no point updating with
+ // |false| all the time.
+ if (
+ lazy.Readerable.shouldCheckUri(document.baseURIObject, true) &&
+ lazy.Readerable.isProbablyReaderable(document)
+ ) {
+ this.sendAsyncMessage("Reader:UpdateReaderButton", {
+ isArticle: true,
+ });
+ } else if (forceNonArticle) {
+ this.sendAsyncMessage("Reader:UpdateReaderButton", {
+ isArticle: false,
+ });
+ }
+ }
+
+ closeReaderMode() {
+ if (this.isAboutReader) {
+ this._isLeavingReaderableReaderMode = this.isReaderableAboutReader;
+ this.sendAsyncMessage("Reader:LeaveReaderMode", {});
+ }
+ }
+}