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// Copyright 2010-2014, Google Inc.
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
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// * Redistributions in binary form must reproduce the above
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#ifndef MOZC_WIN32_BASE_KEYBOARD_LAYOUT_ID_H_
#define MOZC_WIN32_BASE_KEYBOARD_LAYOUT_ID_H_
#include <windows.h>
#include <string>
namespace mozc {
namespace win32 {
// This class represents a keyboard layout identifier (KLID). You can use this
// class to convert to/from both KLID text representation like "04110411" and
// KLID integer representation like 0x04110411.
// Please note that the HKY (a handle to a keyboard layout) is based on
// its entirely different principle from HKID.
// To obtain a HKY corresponding to HKID, use ::LoadKeyboardLayout. Do not
// make a handle based on the integer representation of KLID.
// See the following article for details.
// http://blogs.msdn.com/b/michkap/archive/2005/04/17/409032.aspx
// Note that this simple wrapper accepts any KLID even if the ID is not
// registered in the registry.
class KeyboardLayoutID {
public:
// Initializes an instance with leaving |id_| as 'cleared'.
KeyboardLayoutID();
// Initializes an instance with a KLID in text form.
// |id_| remains 'cleared' if |text| is an invalid text form.
explicit KeyboardLayoutID(const wstring &text);
// Initializes an instance with a KLID in integer form.
explicit KeyboardLayoutID(DWORD id);
// Returns true unless |text| does not have an invalid text form.
// When this method returns false, it behaves as if |clear_id()| was called.
bool Parse(const wstring &text);
// Returns KLID in text form.
// You cannot call this method when |has_id()| returns false.
wstring ToString() const;
// Returns KLID in integer form.
// You cannot call this method when |has_id()| returns false.
DWORD id() const;
// Updates |id_| with the given KLID. Note that this method never checks if
// the given |id| is valid in terms of the existence of the corresponding
// registry entry.
void set_id(DWORD id);
// Returns true unless |id_| is not 'cleared'.
bool has_id() const;
// Set |id_| 'cleared'.
void clear_id();
private:
DWORD id_;
bool has_id_;
};
} // namespace win32
} // namespace mozc
#endif // MOZC_WIN32_BASE_KEYBOARD_LAYOUT_ID_H_