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_IMM32_H_
6#define UI_BASE_IME_INPUT_METHOD_IMM32_H_
7
8#include <windows.h>
9
10#include <string>
11
12#include "base/basictypes.h"
13#include "base/compiler_specific.h"
14#include "ui/base/ime/input_method_win.h"
15
16namespace ui {
17
18// An InputMethod implementation based on Windows IMM32 API.
19class UI_EXPORT InputMethodIMM32 : public InputMethodWin {
20 public:
21  InputMethodIMM32(internal::InputMethodDelegate* delegate,
22                   HWND toplevel_window_handle);
23
24  // Overridden from InputMethod:
25  virtual void OnFocus() OVERRIDE;
26  virtual void OnBlur() OVERRIDE;
27  virtual bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
28                                        NativeEventResult* result) OVERRIDE;
29  virtual void OnTextInputTypeChanged(const TextInputClient* client) OVERRIDE;
30  virtual void OnCaretBoundsChanged(const TextInputClient* client) OVERRIDE;
31  virtual void CancelComposition(const TextInputClient* client) OVERRIDE;
32  virtual bool IsCandidatePopupOpen() const OVERRIDE;
33
34 protected:
35  // Overridden from InputMethodBase:
36  virtual void OnWillChangeFocusedClient(TextInputClient* focused_before,
37                                         TextInputClient* focused) OVERRIDE;
38  virtual void OnDidChangeFocusedClient(TextInputClient* focused_before,
39                                        TextInputClient* focused) OVERRIDE;
40
41 private:
42  LRESULT OnImeSetContext(HWND window_handle,
43                          UINT message,
44                          WPARAM wparam,
45                          LPARAM lparam,
46                          BOOL* handled);
47  LRESULT OnImeStartComposition(HWND window_handle,
48                                UINT message,
49                                WPARAM wparam,
50                                LPARAM lparam,
51                                BOOL* handled);
52  LRESULT OnImeComposition(HWND window_handle,
53                           UINT message,
54                           WPARAM wparam,
55                           LPARAM lparam,
56                           BOOL* handled);
57  LRESULT OnImeEndComposition(HWND window_handle,
58                              UINT message,
59                              WPARAM wparam,
60                              LPARAM lparam,
61                              BOOL* handled);
62  LRESULT OnImeNotify(UINT message,
63                      WPARAM wparam,
64                      LPARAM lparam,
65                      BOOL* handled);
66
67  // Asks the client to confirm current composition text.
68  void ConfirmCompositionText();
69
70  // Enables or disables the IME according to the current text input type.
71  void UpdateIMEState();
72
73  bool enabled_;
74
75  // True if we know for sure that a candidate window is open.
76  bool is_candidate_popup_open_;
77
78  // Window handle where composition is on-going. NULL when there is no
79  // composition.
80  HWND composing_window_handle_;
81
82  DISALLOW_COPY_AND_ASSIGN(InputMethodIMM32);
83};
84
85}  // namespace ui
86
87#endif  // UI_BASE_IME_INPUT_METHOD_IMM32_H_
88