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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 VIEWS_IME_CHARACTER_COMPOSER_H_
#define VIEWS_IME_CHARACTER_COMPOSER_H_
#pragma once
#include <vector>
#include "base/basictypes.h"
#include "base/string_util.h"
namespace views {
// A class to recognize compose and dead key sequence.
// Outputs composed character.
//
// TODO(hashimoto): support unicode character composition starting with
// Ctrl-Shift-U. http://crosbug.com/15925
class CharacterComposer {
public:
CharacterComposer();
~CharacterComposer();
void Reset();
// Filters keypress. Returns true if the keypress is handled.
bool FilterKeyPress(unsigned int keycode);
// Returns a string consisting of composed character.
// Empty is returned when there is no composition result.
const string16& GetComposedCharacter() const {
return composed_character_;
}
private:
std::vector<unsigned int> compose_buffer_;
string16 composed_character_;
DISALLOW_COPY_AND_ASSIGN(CharacterComposer);
};
} // namespace views
#endif // VIEWS_IME_CHARACTER_COMPOSER_H_
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