chrome/browser/sync/sync_error_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_SYNC_ERROR_CONTROLLER_H_
   6 #define CHROME_BROWSER_SYNC_SYNC_ERROR_CONTROLLER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/observer_list.h"
  11 #include "chrome/browser/sync/profile_sync_service_observer.h"
  12
  13 class Profile;
  14 class ProfileSyncService;
  15
  16 // Keep track of sync errors and expose them to observers in the UI.
  17 class SyncErrorController : public ProfileSyncServiceObserver {
  18  public:
  19   // The observer class for SyncErrorController lets the controller notify
  20   // observers when an error arises or changes.
  21   class Observer {
  22    public:
  23     virtual ~Observer() {}
  24     virtual void OnErrorChanged() = 0;
  25   };
  26
  27   explicit SyncErrorController(ProfileSyncService* service);
  28   virtual ~SyncErrorController();
  29
  30   // True if there exists an error worth elevating to the user.
  31   bool HasError();
  32
  33   void AddObserver(Observer* observer);
  34   void RemoveObserver(Observer* observer);
  35
  36   // ProfileSyncServiceObserver:
  37   virtual void OnStateChanged() override;
  38
  39  private:
  40   ProfileSyncService* service_;
  41   ObserverList<Observer, true> observer_list_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(SyncErrorController);
  44 };
  45
  46 #endif  // CHROME_BROWSER_SYNC_SYNC_ERROR_CONTROLLER_H_