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1 /* | |
2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved. | |
3 * | |
4 * Redistribution and use in source and binary forms, with or without | |
5 * modification, are permitted provided that the following conditions | |
6 * are met: | |
7 * 1. Redistributions of source code must retain the above copyright | |
8 * notice, this list of conditions and the following disclaimer. | |
9 * 2. Redistributions in binary form must reproduce the above copyright | |
10 * notice, this list of conditions and the following disclaimer in the | |
11 * documentation and/or other materials provided with the distribution. | |
12 * | |
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 */ | |
25 | |
26 #include "config.h" | |
27 #include "TextBoundaries.h" | |
28 | |
29 #include <unicode/ubrk.h> | |
30 | |
31 #include "StringImpl.h" | |
32 #include "TextBreakIterator.h" | |
33 | |
34 namespace WebCore { | |
35 | |
36 int findNextWordFromIndex(const UChar* chars, int len, int position, bool forwar
d) | |
37 { | |
38 UBreakIterator* it = wordBreakIterator(chars, len); | |
39 | |
40 int newPosition = position; | |
41 | |
42 if (forward) { | |
43 position = ubrk_following(it, position); | |
44 while (position != UBRK_DONE) { | |
45 // We stop searching when the character preceeding the break | |
46 // is alphanumeric. | |
47 if (position < len && u_isalnum(chars[position - 1])) | |
48 return position; | |
49 | |
50 position = ubrk_following(it, position); | |
51 } | |
52 | |
53 return len; | |
54 } else { | |
55 position = ubrk_preceding(it, position); | |
56 while (position != UBRK_DONE) { | |
57 // We stop searching when the character following the break | |
58 // is alphanumeric. | |
59 if (position > 0 && u_isalnum(chars[position])) | |
60 return position; | |
61 | |
62 position = ubrk_preceding(it, position); | |
63 } | |
64 | |
65 return 0; | |
66 } | |
67 } | |
68 | |
69 void findWordBoundary(const UChar* chars, int len, int position, int* start, int
* end) | |
70 { | |
71 UBreakIterator* it = wordBreakIterator(chars, len); | |
72 *end = ubrk_following(it, position); | |
73 if (*end < 0) | |
74 *end = ubrk_last(it); | |
75 *start = ubrk_previous(it); | |
76 } | |
77 | |
78 } // namespace WebCore | |
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