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1 /* | 1 /* |
2 * Copyright (C) 2006 Lars Knoll <lars@trolltech.com> | 2 * Copyright (C) 2006 Lars Knoll <lars@trolltech.com> |
3 * Copyright (C) 2007, 2011, 2012 Apple Inc. All rights reserved. | 3 * Copyright (C) 2007, 2011, 2012 Apple Inc. All rights reserved. |
4 * | 4 * |
5 * This library is free software; you can redistribute it and/or | 5 * This library is free software; you can redistribute it and/or |
6 * modify it under the terms of the GNU Library General Public | 6 * modify it under the terms of the GNU Library General Public |
7 * License as published by the Free Software Foundation; either | 7 * License as published by the Free Software Foundation; either |
8 * version 2 of the License, or (at your option) any later version. | 8 * version 2 of the License, or (at your option) any later version. |
9 * | 9 * |
10 * This library is distributed in the hope that it will be useful, | 10 * This library is distributed in the hope that it will be useful, |
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23 #define TextBreakIterator_h | 23 #define TextBreakIterator_h |
24 | 24 |
25 #include "platform/PlatformExport.h" | 25 #include "platform/PlatformExport.h" |
26 #include "wtf/text/AtomicString.h" | 26 #include "wtf/text/AtomicString.h" |
27 #include "wtf/text/Unicode.h" | 27 #include "wtf/text/Unicode.h" |
28 | 28 |
29 #include <unicode/brkiter.h> | 29 #include <unicode/brkiter.h> |
30 | 30 |
31 namespace blink { | 31 namespace blink { |
32 | 32 |
33 struct ClusterData { | |
34 ClusterData(unsigned numGraphemes, unsigned numCharacters) | |
35 : graphemes(numGraphemes) | |
36 , characters(numCharacters) | |
37 { } | |
38 unsigned graphemes; | |
39 unsigned characters; | |
40 }; | |
41 | |
42 typedef icu::BreakIterator TextBreakIterator; | 33 typedef icu::BreakIterator TextBreakIterator; |
43 | 34 |
44 // Note: The returned iterator is good only until you get another iterator, with
the exception of acquireLineBreakIterator. | 35 // Note: The returned iterator is good only until you get another iterator, with
the exception of acquireLineBreakIterator. |
45 | 36 |
46 // This is similar to character break iterator in most cases, but is subject to | 37 // This is similar to character break iterator in most cases, but is subject to |
47 // platform UI conventions. One notable example where this can be different | 38 // platform UI conventions. One notable example where this can be different |
48 // from character break iterator is Thai prepend characters, see bug 24342. | 39 // from character break iterator is Thai prepend characters, see bug 24342. |
49 // Use this for insertion point and selection manipulations. | 40 // Use this for insertion point and selection manipulations. |
50 PLATFORM_EXPORT TextBreakIterator* cursorMovementIterator(const UChar*, int leng
th); | 41 PLATFORM_EXPORT TextBreakIterator* cursorMovementIterator(const UChar*, int leng
th); |
51 | 42 |
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257 unsigned m_length; | 248 unsigned m_length; |
258 | 249 |
259 // For 16 bit strings, we use a TextBreakIterator. | 250 // For 16 bit strings, we use a TextBreakIterator. |
260 TextBreakIterator* m_iterator; | 251 TextBreakIterator* m_iterator; |
261 }; | 252 }; |
262 | 253 |
263 // Counts the number of grapheme clusters. A surrogate pair or a sequence | 254 // Counts the number of grapheme clusters. A surrogate pair or a sequence |
264 // of a non-combining character and following combining characters is | 255 // of a non-combining character and following combining characters is |
265 // counted as 1 grapheme cluster. | 256 // counted as 1 grapheme cluster. |
266 PLATFORM_EXPORT unsigned numGraphemeClusters(const String&); | 257 PLATFORM_EXPORT unsigned numGraphemeClusters(const String&); |
267 // Counts the number of graphemes and characters. | |
268 PLATFORM_EXPORT ClusterData countCharactersAndGraphemesInCluster(const UChar* no
rmalizedBuffer, unsigned normalizedBufferLength, uint16_t startIndex, uint16_t e
ndIndex); | |
269 | 258 |
270 } | 259 } |
271 | 260 |
272 #endif | 261 #endif |
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