tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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extensions-backgroundscript-status.js (1950B)

      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 "use strict";
      6 
      7 class ExtensionsBackgroundScriptStatusWatcher {
      8  /**
      9   * Start watching for the status updates related to a background
     10   * scripts extension context (either an event page or a background
     11   * service worker).
     12   *
     13   * This is used in about:debugging to update the background script
     14   * row updated visible in Extensions details cards (only for extensions
     15   * with a non persistent background script defined in the manifest)
     16   * when the background contex is terminated on idle or started back
     17   * to handle a persistent WebExtensions API event.
     18   *
     19   * @param RootActor rootActor
     20   *        The root actor in the parent process from which we should
     21   *        observe root resources.
     22   * @param Object options
     23   *        Dictionary object with following attributes:
     24   *        - onAvailable: mandatory function
     25   *          This will be called for each resource.
     26   */
     27  async watch(rootActor, { onAvailable }) {
     28    this.rootActor = rootActor;
     29    this.onAvailable = onAvailable;
     30 
     31    Services.obs.addObserver(this, "extension:background-script-status");
     32  }
     33 
     34  observe(subject, topic) {
     35    switch (topic) {
     36      case "extension:background-script-status": {
     37        const { addonId, isRunning } = subject.wrappedJSObject;
     38        this.onBackgroundScriptStatus(addonId, isRunning);
     39        break;
     40      }
     41    }
     42  }
     43 
     44  onBackgroundScriptStatus(addonId, isRunning) {
     45    this.onAvailable([
     46      {
     47        payload: {
     48          addonId,
     49          isRunning,
     50        },
     51      },
     52    ]);
     53  }
     54 
     55  destroy() {
     56    if (this.onAvailable) {
     57      this.onAvailable = null;
     58      Services.obs.removeObserver(this, "extension:background-script-status");
     59    }
     60  }
     61 }
     62 
     63 module.exports = ExtensionsBackgroundScriptStatusWatcher;