tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

PageDataParent.sys.mjs (1523B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 const lazy = {};
      6 
      7 ChromeUtils.defineESModuleGetters(lazy, {
      8  PageDataService:
      9    "moz-src:///browser/components/pagedata/PageDataService.sys.mjs",
     10 });
     11 
     12 /**
     13 * Receives messages from PageDataChild and passes them to the PageData service.
     14 */
     15 export class PageDataParent extends JSWindowActorParent {
     16  #deferredCollection = null;
     17 
     18  /**
     19   * Starts data collection in the child process. Returns a promise that
     20   * resolves to the page data or null if the page is closed before data
     21   * collection completes.
     22   *
     23   * @returns {Promise<PageData|null>}
     24   */
     25  collectPageData() {
     26    if (!this.#deferredCollection) {
     27      this.#deferredCollection = Promise.withResolvers();
     28      this.sendQuery("PageData:Collect").then(
     29        this.#deferredCollection.resolve,
     30        this.#deferredCollection.reject
     31      );
     32    }
     33 
     34    return this.#deferredCollection.promise;
     35  }
     36 
     37  /**
     38   * Called when the page is destroyed.
     39   */
     40  didDestroy() {
     41    this.#deferredCollection?.resolve(null);
     42  }
     43 
     44  /**
     45   * Called when a message is received from the content process.
     46   *
     47   * @param {ReceiveMessageArgument} msg
     48   *   The received message.
     49   */
     50  receiveMessage(msg) {
     51    switch (msg.name) {
     52      case "PageData:DocumentReady":
     53        lazy.PageDataService.pageLoaded(this, msg.data.url);
     54        break;
     55    }
     56  }
     57 }