74 lines
2.2 KiB
JavaScript
74 lines
2.2 KiB
JavaScript
/* Any copyright is dedicated to the Public Domain.
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http://creativecommons.org/publicdomain/zero/1.0/ */
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export class DocShellHelpersParent extends JSWindowActorParent {
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static eventListener;
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// These static variables should be set when registering the actor
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// (currently doPageNavigation in docshell_helpers.js).
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static eventsToListenFor;
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static observers;
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constructor() {
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super();
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}
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receiveMessage({ name, data }) {
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if (name == "docshell_helpers:event") {
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let { event, originalTargetIsHTMLDocument } = data;
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if (this.constructor.eventsToListenFor.includes(event.type)) {
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this.constructor.eventListener(event, originalTargetIsHTMLDocument);
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}
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} else if (name == "docshell_helpers:observe") {
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let { topic } = data;
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this.constructor.observers.get(topic).call();
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}
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}
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}
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export class DocShellHelpersChild extends JSWindowActorChild {
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constructor() {
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super();
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}
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receiveMessage({ name }) {
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if (name == "docshell_helpers:preventBFCache") {
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// Add an RTCPeerConnection to prevent the page from being bfcached.
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let win = this.contentWindow;
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win.blockBFCache = new win.RTCPeerConnection();
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}
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}
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handleEvent(event) {
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if (
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Document.isInstance(event.originalTarget) &&
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event.originalTarget.isInitialDocument
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) {
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dump(`TEST: ignoring a ${event.type} event for an initial about:blank\n`);
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return;
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}
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this.sendAsyncMessage("docshell_helpers:event", {
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event: {
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type: event.type,
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persisted: event.persisted,
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originalTarget: {
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title: event.originalTarget.title,
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location: event.originalTarget.location.href,
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visibilityState: event.originalTarget.visibilityState,
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hidden: event.originalTarget.hidden,
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},
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},
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originalTargetIsHTMLDocument: HTMLDocument.isInstance(
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event.originalTarget
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),
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});
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}
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observe(subject, topic) {
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if (Window.isInstance(subject) && subject.document.isInitialDocument) {
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dump(`TEST: ignoring a topic notification for an initial about:blank\n`);
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return;
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}
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this.sendAsyncMessage("docshell_helpers:observe", { topic });
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}
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}
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