| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_SYNC_DRIVER_SYNC_ERROR_CONTROLLER_H_ |
| #define COMPONENTS_SYNC_DRIVER_SYNC_ERROR_CONTROLLER_H_ |
| |
| #include "base/compiler_specific.h" |
| #include "base/macros.h" |
| #include "base/observer_list.h" |
| #include "components/sync_driver/sync_service_observer.h" |
| |
| namespace sync_driver { |
| class SyncService; |
| } |
| |
| // Keep track of sync errors and expose them to observers in the UI. |
| class SyncErrorController : public sync_driver::SyncServiceObserver { |
| public: |
| // The observer class for SyncErrorController lets the controller notify |
| // observers when an error arises or changes. |
| class Observer { |
| public: |
| virtual ~Observer() {} |
| virtual void OnErrorChanged() = 0; |
| }; |
| |
| explicit SyncErrorController(sync_driver::SyncService* service); |
| ~SyncErrorController() override; |
| |
| // True if there exists an error worth elevating to the user. |
| bool HasError(); |
| |
| void AddObserver(Observer* observer); |
| void RemoveObserver(Observer* observer); |
| |
| // sync_driver::SyncServiceObserver: |
| void OnStateChanged() override; |
| |
| private: |
| sync_driver::SyncService* service_; |
| base::ObserverList<Observer, true> observer_list_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SyncErrorController); |
| }; |
| |
| #endif // COMPONENTS_SYNC_DRIVER_SYNC_ERROR_CONTROLLER_H_ |