chrome/browser/resources/hotword/manager.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 (function() {
   6   'use strict';
   7
   8   /**
   9    * @fileoverview This extension provides hotword triggering capabilites to
  10    * Chrome.
  11    *
  12    * This extension contains all the JavaScript for loading and managing the
  13    * hotword detector. The hotword detector and language model data will be
  14    * provided by a shared module loaded from the web store.
  15    *
  16    * IMPORTANT! Whenever adding new events, the extension version number MUST be
  17    * incremented.
  18    */
  19
  20   // Hotwording state.
  21   var stateManager = new hotword.StateManager();
  22
  23   // Detect Chrome startup and make sure we get a chance to run.
  24   chrome.runtime.onStartup.addListener(function() {
  25     stateManager.updateStatus();
  26   });
  27
  28   // Detect when hotword settings have changed.
  29   chrome.hotwordPrivate.onEnabledChanged.addListener(function() {
  30     stateManager.updateStatus();
  31   });
  32
  33   // Detect when the shared module containing the NaCL module and language model
  34   // is installed.
  35   chrome.management.onInstalled.addListener(function(info) {
  36     if (info.id == hotword.constants.SHARED_MODULE_ID)
  37       chrome.runtime.reload();
  38   });
  39
  40   // Detect when a session has requested to be started and stopped.
  41   chrome.hotwordPrivate.onHotwordSessionRequested.addListener(function() {
  42     // TODO(amistry): This event should change state depending on whether the
  43     // user has enabled always-on hotwording. But for now, always signal the
  44     // start of a hotwording session. This allows this extension to work with
  45     // the app launcher in the current state.
  46     stateManager.startSession(
  47         hotword.constants.SessionSource.LAUNCHER,
  48         function() {
  49           chrome.hotwordPrivate.setHotwordSessionState(true, function() {});
  50         });
  51   });
  52
  53   chrome.hotwordPrivate.onHotwordSessionStopped.addListener(function() {
  54     stateManager.stopSession(hotword.constants.SessionSource.LAUNCHER);
  55     chrome.hotwordPrivate.setHotwordSessionState(false, function() {});
  56   });
  57 }());