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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_BASE_IME_INPUT_METHOD_WIN_H_
#define UI_BASE_IME_INPUT_METHOD_WIN_H_
#include <windows.h>
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "ui/base/ime/input_method_base.h"
#include "ui/base/win/ime_input.h"
namespace ui {
// An InputMethod implementation based on Windows IMM32 API.
class UI_EXPORT InputMethodWin : public InputMethodBase {
public:
explicit InputMethodWin(internal::InputMethodDelegate* delegate, HWND hwnd);
virtual ~InputMethodWin();
// Overridden from InputMethod:
virtual void Init(bool focused) OVERRIDE;
virtual void OnFocus() OVERRIDE;
virtual void OnBlur() OVERRIDE;
virtual void DispatchKeyEvent(
const base::NativeEvent& native_key_event) OVERRIDE;
virtual void DispatchFabricatedKeyEvent(const ui::KeyEvent& event) OVERRIDE;
virtual void OnTextInputTypeChanged(const TextInputClient* client) OVERRIDE;
virtual void OnCaretBoundsChanged(const TextInputClient* client) OVERRIDE;
virtual void CancelComposition(const TextInputClient* client) OVERRIDE;
virtual std::string GetInputLocale() OVERRIDE;
virtual base::i18n::TextDirection GetInputTextDirection() OVERRIDE;
virtual bool IsActive() OVERRIDE;
// Handles IME messages.
LRESULT OnImeMessages(UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
// Message handlers. The native widget is responsible for forwarding following
// messages to the input method.
void OnInputLangChange(DWORD character_set, HKL input_language_id);
protected:
// Overridden from InputMethodBase:
virtual void OnWillChangeFocusedClient(TextInputClient* focused_before,
TextInputClient* focused) OVERRIDE;
virtual void OnDidChangeFocusedClient(TextInputClient* focused_before,
TextInputClient* focused) OVERRIDE;
private:
LRESULT OnImeSetContext(UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
LRESULT OnImeStartComposition(UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
LRESULT OnImeComposition(UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
LRESULT OnImeEndComposition(UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
LRESULT OnImeRequest(UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
// For both WM_CHAR and WM_SYSCHAR
LRESULT OnChar(UINT message, WPARAM wparam, LPARAM lparam, BOOL* handled);
// For both WM_DEADCHAR and WM_SYSDEADCHAR
LRESULT OnDeadChar(UINT message, WPARAM wparam, LPARAM lparam, BOOL* handled);
LRESULT OnDocumentFeed(RECONVERTSTRING *reconv);
LRESULT OnReconvertString(RECONVERTSTRING *reconv);
// Asks the client to confirm current composition text.
void ConfirmCompositionText();
// Enables or disables the IME according to the current text input type.
void UpdateIMEState();
// The HWND this InputMethod is bound to.
HWND hwnd_;
// Indicates if the current input locale has an IME.
bool active_;
// Name of the current input locale.
std::string locale_;
// The current input text direction.
base::i18n::TextDirection direction_;
// The new text direction and layout alignment requested by the user by
// pressing ctrl-shift. It'll be sent to the text input client when the key
// is released.
base::i18n::TextDirection pending_requested_direction_;
// Windows IMM32 wrapper.
// (See "ui/base/win/ime_input.h" for its details.)
ui::ImeInput ime_input_;
bool enabled_;
DISALLOW_COPY_AND_ASSIGN(InputMethodWin);
};
} // namespace ui
#endif // UI_BASE_IME_INPUT_METHOD_WIN_H_
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