sky/engine/platform/text/TextBoundaries.h

/*
 * Copyright (C) 2004, 2006 Apple Computer, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef SKY_ENGINE_PLATFORM_TEXT_TEXTBOUNDARIES_H_
#define SKY_ENGINE_PLATFORM_TEXT_TEXTBOUNDARIES_H_

#include "sky/engine/platform/PlatformExport.h"
#include "sky/engine/wtf/unicode/Unicode.h"

namespace blink {

inline bool requiresContextForWordBoundary(UChar32 ch)
{
    return WTF::Unicode::hasLineBreakingPropertyComplexContext(ch);
}

PLATFORM_EXPORT int endOfFirstWordBoundaryContext(const UChar* characters, int length);
PLATFORM_EXPORT int startOfLastWordBoundaryContext(const UChar* characters, int length);

PLATFORM_EXPORT void findWordBoundary(const UChar*, int len, int position, int* start, int* end);
PLATFORM_EXPORT int findWordEndBoundary(const UChar*, int len, int position);
PLATFORM_EXPORT int findNextWordFromIndex(const UChar*, int len, int position, bool forward);

}

#endif  // SKY_ENGINE_PLATFORM_TEXT_TEXTBOUNDARIES_H_