chrome/browser/search/hotword_service_factory.h

   1 // Copyright 2013 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 #ifndef CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_FACTORY_H_
   6 #define CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_FACTORY_H_
   7
   8 #include "base/memory/singleton.h"
   9 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
  10
  11 class HotwordService;
  12 class Profile;
  13
  14 // Singleton that owns all HotwordServices and associates them with Profiles.
  15 class HotwordServiceFactory : public BrowserContextKeyedServiceFactory {
  16  public:
  17   // Returns the HotwordService for |context|.
  18   static HotwordService* GetForProfile(content::BrowserContext* context);
  19
  20   static HotwordServiceFactory* GetInstance();
  21
  22   // Returns true if the hotwording service is available for |context|.
  23   static bool IsServiceAvailable(content::BrowserContext* context);
  24
  25   // Returns true if hotwording is allowed for |context|.
  26   static bool IsHotwordAllowed(content::BrowserContext* context);
  27
  28   // Returns whether always-on hotwording is available.
  29   static bool IsAlwaysOnAvailable();
  30
  31   // Returns the current error message for the service for |context|.
  32   // A value of 0 indicates no error.
  33   static int GetCurrentError(content::BrowserContext* context);
  34
  35   // This will kick off the monitor that calls OnUpdateAudioDevices when the
  36   // number of audio devices changes (or is initialized). It needs to be a
  37   // separate function so it can be called after the service is initialized
  38   // (i.e., after startup). The monitor can't be initialized during startup
  39   // because it would slow down startup too much so it is delayed and not
  40   // called until it's needed by the webui in browser_options_handler.
  41   void UpdateMicrophoneState();
  42
  43  private:
  44   friend struct DefaultSingletonTraits<HotwordServiceFactory>;
  45
  46   HotwordServiceFactory();
  47   ~HotwordServiceFactory() override;
  48
  49   // Overrides from BrowserContextKeyedServiceFactory:
  50   void RegisterProfilePrefs(
  51       user_prefs::PrefRegistrySyncable* registry) override;
  52   KeyedService* BuildServiceInstanceFor(
  53       content::BrowserContext* context) const override;
  54
  55   DISALLOW_COPY_AND_ASSIGN(HotwordServiceFactory);
  56 };
  57
  58 #endif  // CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_FACTORY_H_