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1 /* | |
2 * Copyright (C) 2012 Apple Inc. All rights reserved. | |
3 * Copyright (C) Research In Motion Limited 2011. All rights reserved. | |
4 * | |
5 * This library is free software; you can redistribute it and/or | |
6 * modify it under the terms of the GNU Library General Public | |
7 * License as published by the Free Software Foundation; either | |
8 * version 2 of the License, or (at your option) any later version. | |
9 * | |
10 * This library is distributed in the hope that it will be useful, | |
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 * Library General Public License for more details. | |
14 * | |
15 * You should have received a copy of the GNU Library General Public License | |
16 * along with this library; see the file COPYING.LIB. If not, write to | |
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
18 * Boston, MA 02110-1301, USA. | |
19 * | |
20 */ | |
21 | |
22 #ifndef Latin1TextIterator_h | |
23 #define Latin1TextIterator_h | |
24 | |
25 #include "wtf/text/WTFString.h" | |
26 | |
27 namespace WebCore { | |
28 | |
29 class Latin1TextIterator { | |
30 public: | |
31 // The passed in LChar pointer starts at 'currentCharacter'. The iterator op
erates on the range [currentCharacter, lastCharacter]. | |
32 // 'endCharacter' denotes the maximum length of the UChar array, which might
exceed 'lastCharacter'. | |
33 Latin1TextIterator(const LChar* characters, int currentCharacter, int lastCh
aracter, int /*endCharacter*/) | |
34 : m_characters(characters) | |
35 , m_currentCharacter(currentCharacter) | |
36 , m_lastCharacter(lastCharacter) | |
37 { | |
38 } | |
39 | |
40 bool consume(UChar32& character, unsigned& clusterLength) | |
41 { | |
42 if (m_currentCharacter >= m_lastCharacter) | |
43 return false; | |
44 | |
45 character = *m_characters; | |
46 clusterLength = 1; | |
47 return true; | |
48 } | |
49 | |
50 void advance(unsigned advanceLength) | |
51 { | |
52 m_characters += advanceLength; | |
53 m_currentCharacter += advanceLength; | |
54 } | |
55 | |
56 int currentCharacter() const { return m_currentCharacter; } | |
57 const LChar* characters() const { return m_characters; } | |
58 | |
59 private: | |
60 const LChar* m_characters; | |
61 int m_currentCharacter; | |
62 int m_lastCharacter; | |
63 }; | |
64 | |
65 } | |
66 | |
67 #endif | |
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