| // 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 recognized as a part of composition |
| // sequence. |
| bool FilterKeyPress(unsigned int keycode); |
| |
| // Returns a string consisting of composed character. |
| // Empty string is returned when there is no composition result. |
| const string16& composed_character() const { |
| return composed_character_; |
| } |
| |
| private: |
| // Remembers keypresses previously filtered. |
| std::vector<unsigned int> compose_buffer_; |
| |
| // A string representing the composed character. |
| string16 composed_character_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CharacterComposer); |
| }; |
| |
| } // namespace views |
| |
| #endif // VIEWS_IME_CHARACTER_COMPOSER_H_ |