1/*
2 * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.
3 * Copyright (C) 2009 Dominik Röttsches <dominik.roettsches@access-company.com>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "TextBoundaries.h"
29
30#include "StringImpl.h"
31#include "TextBreakIterator.h"
32#include <wtf/unicode/Unicode.h>
33
34using namespace WTF;
35using namespace Unicode;
36
37namespace WebCore {
38
39int findNextWordFromIndex(const UChar* chars, int len, int position, bool forward)
40{
41    TextBreakIterator* it = wordBreakIterator(chars, len);
42
43    if (forward) {
44        position = textBreakFollowing(it, position);
45        while (position != TextBreakDone) {
46            // We stop searching when the character preceeding the break
47            // is alphanumeric.
48            if (position < len && isAlphanumeric(chars[position - 1]))
49                return position;
50
51            position = textBreakFollowing(it, position);
52        }
53
54        return len;
55    } else {
56        position = textBreakPreceding(it, position);
57        while (position != TextBreakDone) {
58            // We stop searching when the character following the break
59            // is alphanumeric.
60            if (position > 0 && isAlphanumeric(chars[position]))
61                return position;
62
63            position = textBreakPreceding(it, position);
64        }
65
66        return 0;
67    }
68}
69
70void findWordBoundary(const UChar* chars, int len, int position, int* start, int* end)
71{
72    TextBreakIterator* it = wordBreakIterator(chars, len);
73    *end = textBreakFollowing(it, position);
74    if (*end < 0)
75        *end = textBreakLast(it);
76    *start = textBreakPrevious(it);
77}
78
79} // namespace WebCore
80