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      1 // Copyright (c) 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 UI_BASE_IME_INPUT_METHOD_OBSERVER_H_
      6 #define UI_BASE_IME_INPUT_METHOD_OBSERVER_H_
      7 
      8 #include "ui/base/ui_export.h"
      9 
     10 namespace ui {
     11 
     12 class InputMethod;
     13 class TextInputClient;
     14 
     15 class UI_EXPORT InputMethodObserver {
     16  public:
     17   virtual ~InputMethodObserver() {}
     18 
     19   // Called when either:
     20   //  - the TextInputClient is changed (e.g. by a change of focus)
     21   //  - the TextInputType of the TextInputClient changes
     22   virtual void OnTextInputStateChanged(const TextInputClient* client) = 0;
     23 
     24   // Called when the observed InputMethod is being destroyed.
     25   virtual void OnInputMethodDestroyed(const InputMethod* input_method) = 0;
     26 };
     27 
     28 }  // namespace ui
     29 
     30 #endif  // UI_BASE_IME_INPUT_METHOD_OBSERVER_H_
     31