src/chrome/browser/sync/sessions/session_data_type_controller.h

   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 #ifndef CHROME_BROWSER_SYNC_SESSIONS_SESSION_DATA_TYPE_CONTROLLER_H_
   6 #define CHROME_BROWSER_SYNC_SESSIONS_SESSION_DATA_TYPE_CONTROLLER_H_
   7
   8 #include "base/prefs/pref_change_registrar.h"
   9 #include "components/sync_driver/local_device_info_provider.h"
  10 #include "components/sync_driver/ui_data_type_controller.h"
  11 #include "content/public/browser/notification_observer.h"
  12 #include "content/public/browser/notification_registrar.h"
  13
  14 class Profile;
  15
  16 namespace browser_sync {
  17
  18 class SyncedWindowDelegatesGetter;
  19
  20 // Overrides StartModels to avoid sync contention with sessions during
  21 // a session restore operation at startup and to wait for the local
  22 // device info to become available.
  23 class SessionDataTypeController : public sync_driver::UIDataTypeController,
  24                                   public content::NotificationObserver {
  25  public:
  26   SessionDataTypeController(sync_driver::SyncApiComponentFactory* factory,
  27                             Profile* profile,
  28                             SyncedWindowDelegatesGetter* synced_window_getter,
  29                             sync_driver::LocalDeviceInfoProvider* local_device);
  30
  31   // NotificationObserver interface.
  32   virtual void Observe(int type,
  33                        const content::NotificationSource& source,
  34                        const content::NotificationDetails& details) OVERRIDE;
  35
  36   // UIDataTypeController interface.
  37   virtual bool StartModels() OVERRIDE;
  38   virtual void StopModels() OVERRIDE;
  39   virtual bool ReadyForStart() const OVERRIDE;
  40
  41  protected:
  42   virtual ~SessionDataTypeController();
  43
  44  private:
  45   bool IsWaiting();
  46   void MaybeCompleteLoading();
  47   void OnLocalDeviceInfoInitialized();
  48   void OnSavingBrowserHistoryPrefChanged();
  49
  50   Profile* const profile_;
  51
  52   SyncedWindowDelegatesGetter* synced_window_getter_;
  53   content::NotificationRegistrar notification_registrar_;
  54
  55   sync_driver::LocalDeviceInfoProvider* const local_device_;
  56   scoped_ptr<sync_driver::LocalDeviceInfoProvider::Subscription> subscription_;
  57
  58   // Flags that indicate the reason for pending loading models.
  59   bool waiting_on_session_restore_;
  60   bool waiting_on_local_device_info_;
  61
  62   PrefChangeRegistrar pref_registrar_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(SessionDataTypeController);
  65 };
  66
  67 }  // namespace browser_sync
  68
  69 #endif  // CHROME_BROWSER_SYNC_SESSIONS_SESSION_DATA_TYPE_CONTROLLER_H_