forked from mirrors/gecko-dev
57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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const lazy = {};
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ChromeUtils.defineESModuleGetters(lazy, {
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PageDataService: "resource:///modules/pagedata/PageDataService.sys.mjs",
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PromiseUtils: "resource://gre/modules/PromiseUtils.sys.mjs",
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});
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/**
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* Receives messages from PageDataChild and passes them to the PageData service.
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*/
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export class PageDataParent extends JSWindowActorParent {
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#deferredCollection = null;
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/**
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* Starts data collection in the child process. Returns a promise that
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* resolves to the page data or null if the page is closed before data
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* collection completes.
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*
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* @returns {Promise<PageData|null>}
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*/
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collectPageData() {
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if (!this.#deferredCollection) {
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this.#deferredCollection = lazy.PromiseUtils.defer();
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this.sendQuery("PageData:Collect").then(
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this.#deferredCollection.resolve,
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this.#deferredCollection.reject
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);
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}
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return this.#deferredCollection.promise;
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}
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/**
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* Called when the page is destroyed.
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*/
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didDestroy() {
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this.#deferredCollection?.resolve(null);
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}
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/**
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* Called when a message is received from the content process.
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*
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* @param {ReceiveMessageArgument} msg
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* The received message.
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*/
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receiveMessage(msg) {
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switch (msg.name) {
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case "PageData:DocumentReady":
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lazy.PageDataService.pageLoaded(this, msg.data.url);
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break;
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}
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}
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}
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