blob: 291e80a1d40a09283659d3aa8684a6a358a9e30c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
// 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_
|
