win8/metro_driver/ime/input_source.h

   1 // Copyright 2013 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 WIN8_METRO_DRIVER_IME_INPUT_SOURCE_H_
   6 #define WIN8_METRO_DRIVER_IME_INPUT_SOURCE_H_
   7
   8 #include <Windows.h>
   9
  10 #include "base/memory/scoped_ptr.h"
  11
  12 namespace metro_driver {
  13
  14 class InputSourceObserver;
  15
  16 // An interface through which information about the input source can be
  17 // retrieved, where an input source represents an IME or a keyboard layout.
  18 class InputSource {
  19  public:
  20   virtual ~InputSource() {}
  21   // Create an instance. Returns NULL if fails.
  22   static scoped_ptr<InputSource> Create();
  23
  24   // Returns true if |langid| and |is_ime| are filled based on the current
  25   // active input source.
  26   virtual bool GetActiveSource(LANGID* langid, bool* is_ime) = 0;
  27
  28   // Adds/Removes an observer to receive notifications when the active input
  29   // source is changed.
  30   virtual void AddObserver(InputSourceObserver* observer) = 0;
  31   virtual void RemoveObserver(InputSourceObserver* observer) = 0;
  32 };
  33
  34 }  // namespace metro_driver
  35
  36 #endif  // WIN8_METRO_DRIVER_IME_INPUT_SOURCE_H_