ui/base/ime/input_method_observer.h

   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_base_export.h"
   9
  10 namespace ui {
  11
  12 class InputMethod;
  13 class TextInputClient;
  14
  15 class UI_BASE_EXPORT InputMethodObserver {
  16  public:
  17   virtual ~InputMethodObserver() {}
  18
  19   // Called whenever the text input type is changed for the focused client.
  20   // Currently only used by the mock input method for testing.
  21   virtual void OnTextInputTypeChanged(const TextInputClient* client) = 0;
  22
  23   // Called when the top-level system window gets keyboard focus. Currently
  24   // only used by the mock input method for testing.
  25   virtual void OnFocus() = 0;
  26
  27   // Called when the top-level system window loses keyboard focus. Currently
  28   // only used by the mock input method for testing.
  29   virtual void OnBlur() = 0;
  30
  31   // Called whenever the caret bounds is changed for the input client.
  32   // Currently only used by the mock input method for testing.
  33   virtual void OnCaretBoundsChanged(const TextInputClient* client) = 0;
  34
  35   // Called when either:
  36   //  - the TextInputClient is changed (e.g. by a change of focus)
  37   //  - the TextInputType of the TextInputClient changes
  38   virtual void OnTextInputStateChanged(const TextInputClient* client) = 0;
  39
  40   // Called when the observed InputMethod is being destroyed.
  41   virtual void OnInputMethodDestroyed(const InputMethod* input_method) = 0;
  42
  43   // Called when a user gesture should trigger showing the virtual keyboard
  44   // or alternate input view (e.g. handwriting palette). Used in ChromeOS.
  45   virtual void OnShowImeIfNeeded() = 0;
  46 };
  47
  48 }  // namespace ui
  49
  50 #endif  // UI_BASE_IME_INPUT_METHOD_OBSERVER_H_