1 // Copyright (c) 2012 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 CHROMEOS_IME_IBUS_DAEMON_CONTROLLER_H_ 6 #define CHROMEOS_IME_IBUS_DAEMON_CONTROLLER_H_ 7 8 #include "base/memory/ref_counted.h" 9 #include "base/sequenced_task_runner.h" 10 #include "chromeos/chromeos_export.h" 11 12 namespace chromeos { 13 14 // IBusDaemonController is used to start/stop ibus-daemon process. This class is 15 // also watching ibus-daemon process and if it is crashed, re-launch it 16 // automatically. This class is managed as Singleton. 17 class CHROMEOS_EXPORT IBusDaemonController { 18 public: 19 class Observer { 20 public: 21 // Called when the connection with ibus-daemon is established. 22 virtual void OnConnected() = 0; 23 24 // Called when the connection with ibus-daemon is lost. 25 virtual void OnDisconnected() = 0; 26 }; 27 28 // Initializes IBusDaemonController. ibus-daemon related file handling is 29 // posted to |file_task_runner|. This function must be called before any 30 // GetInstance() function call. 31 static void Initialize( 32 const scoped_refptr<base::SequencedTaskRunner>& ui_task_runner, 33 const scoped_refptr<base::SequencedTaskRunner>& file_task_runner); 34 35 // Similar to Initialize(), but can inject alternative IBusDaemonController 36 // such as MockIBusDaemonController for testing. The injected object object 37 // will be owned by the internal pointer and deleted by Shutdown(). 38 static void InitializeForTesting(IBusDaemonController* controller); 39 40 // Destroys the global instance. 41 static void Shutdown(); 42 43 // Returns actual implementation of IBusDaemonController. If the browser is 44 // not running on the Chrome OS device, this function returns stub 45 // implementation. 46 static CHROMEOS_EXPORT IBusDaemonController* GetInstance(); 47 48 virtual ~IBusDaemonController(); 49 50 virtual void AddObserver(Observer* observer) = 0; 51 virtual void RemoveObserver(Observer* observer) = 0; 52 53 // Starts ibus-daemon. 54 virtual bool Start() = 0; 55 56 // Stops ibus-daemon. 57 virtual bool Stop() = 0; 58 59 protected: 60 // IBusDaemonController is managed as singleton. Use GetInstance instead. 61 IBusDaemonController(); 62 63 DISALLOW_COPY_AND_ASSIGN(IBusDaemonController); 64 }; 65 66 } // namespace chromeos 67 68 #endif // CHROMEOS_IME_IBUS_DAEMON_CONTROLLER_H_ 69
