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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/ime/win/imm32_manager.h"
namespace ui {
// A common InputMethod implementation based on IMM32.
class UI_BASE_EXPORT InputMethodWin : public InputMethodBase {
public:
InputMethodWin(internal::InputMethodDelegate* delegate,
HWND toplevel_window_handle);
// Overridden from InputMethod:
virtual void Init(bool focused) OVERRIDE;
virtual void OnFocus() OVERRIDE;
virtual void OnBlur() OVERRIDE;
virtual bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
NativeEventResult* result) OVERRIDE;
virtual bool DispatchKeyEvent(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 void OnInputLocaleChanged() OVERRIDE;
virtual std::string GetInputLocale() OVERRIDE;
virtual bool IsActive() OVERRIDE;
virtual bool IsCandidatePopupOpen() const OVERRIDE;
protected:
// Overridden from InputMethodBase:
// If a derived class overrides this method, it should call parent's
// implementation.
virtual void OnWillChangeFocusedClient(TextInputClient* focused_before,
TextInputClient* focused) OVERRIDE;
virtual void OnDidChangeFocusedClient(TextInputClient* focused_before,
TextInputClient* focused) OVERRIDE;
private:
// For both WM_CHAR and WM_SYSCHAR
LRESULT OnChar(HWND window_handle,
UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
LRESULT OnImeSetContext(HWND window_handle,
UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
LRESULT OnImeStartComposition(HWND window_handle,
UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
LRESULT OnImeComposition(HWND window_handle,
UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
LRESULT OnImeEndComposition(HWND window_handle,
UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
LRESULT OnImeNotify(UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
// Some IMEs rely on WM_IME_REQUEST message even when TSF is enabled. So
// OnImeRequest (and its actual implementations as OnDocumentFeed,
// OnReconvertString, and OnQueryCharPosition) are placed in this base class.
LRESULT OnImeRequest(UINT message,
WPARAM wparam,
LPARAM lparam,
BOOL* handled);
LRESULT OnDocumentFeed(RECONVERTSTRING* reconv);
LRESULT OnReconvertString(RECONVERTSTRING* reconv);
LRESULT OnQueryCharPosition(IMECHARPOSITION* char_positon);
// Returns the window handle to which |text_input_client| is bound.
// On Aura environment, |toplevel_window_handle_| is always returned.
HWND GetAttachedWindowHandle(const TextInputClient* text_input_client) const;
// Returns true if the Win32 native window bound to |client| is considered
// to be ready for receiving keyboard input.
bool IsWindowFocused(const TextInputClient* client) const;
bool DispatchFabricatedKeyEvent(const ui::KeyEvent& event);
// Asks the client to confirm current composition text.
void ConfirmCompositionText();
// Enables or disables the IME according to the current text input type.
void UpdateIMEState();
// Windows IMM32 wrapper.
// (See "ui/base/ime/win/ime_input.h" for its details.)
ui::IMM32Manager imm32_manager_;
// The toplevel window handle.
// On non-Aura environment, this value is not used and always NULL.
const HWND toplevel_window_handle_;
// Name of the current input locale.
std::string locale_;
// 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_;
// Represents if WM_CHAR[wparam=='\r'] should be dispatched to the focused
// text input client or ignored silently. This flag is introduced as a quick
// workaround against crbug.com/319100
// TODO(yukawa, IME): Figure out long-term solution.
bool accept_carriage_return_;
// Indicates if the current input locale has an IME.
bool active_;
// True when an IME should be allowed to process key events.
bool enabled_;
// True if we know for sure that a candidate window is open.
bool is_candidate_popup_open_;
// Window handle where composition is on-going. NULL when there is no
// composition.
HWND composing_window_handle_;
DISALLOW_COPY_AND_ASSIGN(InputMethodWin);
};
} // namespace ui
#endif // UI_BASE_IME_INPUT_METHOD_WIN_H_
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