forked from mirrors/gecko-dev
69 lines
1.9 KiB
JavaScript
69 lines
1.9 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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"use strict";
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var EXPORTED_SYMBOLS = ["PageDataParent"];
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const { XPCOMUtils } = ChromeUtils.import(
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"resource://gre/modules/XPCOMUtils.jsm"
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);
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XPCOMUtils.defineLazyModuleGetters(this, {
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PageDataService: "resource:///modules/pagedata/PageDataService.jsm",
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PromiseUtils: "resource://gre/modules/PromiseUtils.jsm",
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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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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 initial set of data discovered.
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*
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* @returns {Promise<Data[]>}
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*/
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collectPageData() {
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if (!this.#deferredCollection) {
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this.#deferredCollection = 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?.reject(
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new Error("Page destroyed before collection completed.")
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);
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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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PageDataService.pageLoaded(this, msg.data.url);
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break;
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// TODO: This is for supporting listening to dynamic changes. See
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// PageDataChild.jsm for more information.
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// case "PageData:Collected":
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// PageDataService.pageDataDiscovered(msg.data.url, msg.data.data);
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// break;
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}
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}
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}
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