1/*
2 * Copyright (C) 2004, 2006 Apple Computer, 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#ifndef TextBoundaries_h
27#define TextBoundaries_h
28
29#include "platform/PlatformExport.h"
30#include "wtf/unicode/Unicode.h"
31
32namespace blink {
33
34inline bool requiresContextForWordBoundary(UChar32 ch)
35{
36    return WTF::Unicode::hasLineBreakingPropertyComplexContext(ch);
37}
38
39PLATFORM_EXPORT int endOfFirstWordBoundaryContext(const UChar* characters, int length);
40PLATFORM_EXPORT int startOfLastWordBoundaryContext(const UChar* characters, int length);
41
42PLATFORM_EXPORT void findWordBoundary(const UChar*, int len, int position, int* start, int* end);
43PLATFORM_EXPORT int findWordEndBoundary(const UChar*, int len, int position);
44PLATFORM_EXPORT int findNextWordFromIndex(const UChar*, int len, int position, bool forward);
45
46}
47
48#endif
49