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 COMPONENTS_INVALIDATION_TICL_SETTINGS_PROVIDER_H_ 6 #define COMPONENTS_INVALIDATION_TICL_SETTINGS_PROVIDER_H_ 7 8 #include "base/macros.h" 9 #include "base/observer_list.h" 10 11 namespace invalidation { 12 13 // Provides configuration settings to TiclInvalidationService and notifies it 14 // when the settings change. 15 class TiclSettingsProvider { 16 public: 17 class Observer { 18 public: 19 virtual void OnUseGCMChannelChanged() = 0; 20 21 protected: 22 virtual ~Observer(); 23 }; 24 25 TiclSettingsProvider(); 26 virtual ~TiclSettingsProvider(); 27 28 virtual bool UseGCMChannel() const = 0; 29 30 void AddObserver(Observer* observer); 31 void RemoveObserver(Observer* observer); 32 33 protected: 34 void FireOnUseGCMChannelChanged(); 35 36 private: 37 ObserverList<Observer, true> observers_; 38 39 DISALLOW_COPY_AND_ASSIGN(TiclSettingsProvider); 40 }; 41 42 } // namespace invalidation 43 44 #endif // COMPONENTS_INVALIDATION_TICL_SETTINGS_PROVIDER_H_ 45