1/*
2 * Copyright (C) 2004, 2006 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 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 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#ifndef TextBoundaries_h
27#define TextBoundaries_h
28
29#include <unicode/uchar.h>
30#include <wtf/Forward.h>
31
32namespace WebCore {
33
34    inline bool requiresContextForWordBoundary(UChar32 character)
35    {
36        // FIXME: This function won't be needed when https://bugs.webkit.org/show_bug.cgi?id=120656 is fixed.
37
38        // We can get rid of this constant if we require a newer version of the ICU headers.
39        const int WK_U_LB_CONDITIONAL_JAPANESE_STARTER = 37;
40
41        int lineBreak = u_getIntPropertyValue(character, UCHAR_LINE_BREAK);
42        return lineBreak == U_LB_COMPLEX_CONTEXT || lineBreak == WK_U_LB_CONDITIONAL_JAPANESE_STARTER || lineBreak == U_LB_IDEOGRAPHIC;
43    }
44
45    unsigned endOfFirstWordBoundaryContext(StringView);
46    unsigned startOfLastWordBoundaryContext(StringView);
47
48    void findWordBoundary(StringView, int position, int* start, int* end);
49    void findEndWordBoundary(StringView, int position, int* end);
50    int findNextWordFromIndex(StringView, int position, bool forward);
51
52}
53
54#endif
55