/*

 * Copyright (C) 2006, 2007 Apple 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. 

 */

#include "config.h"

#include "TextBoundaries.h"

#include <unicode/ubrk.h>

#include "StringImpl.h"

#include "TextBreakIterator.h"

namespace WebCore {

int findNextWordFromIndex(const UChar* chars, int len, int position, bool forward)

{

    UBreakIterator* it = wordBreakIterator(chars, len);

    int newPosition = position;

    if (forward) {

        position = ubrk_following(it, position);

        while (position != UBRK_DONE) {

            // We stop searching when the character preceeding the break

            // is alphanumeric.

            if (position < len && u_isalnum(chars[position - 1]))

                return position;

            position = ubrk_following(it, position);

        }

        return len;

    } else {

        position = ubrk_preceding(it, position);

        while (position != UBRK_DONE) {

            // We stop searching when the character following the break

            // is alphanumeric.

            if (position > 0 && u_isalnum(chars[position]))

                return position;

            position = ubrk_preceding(it, position);

        }

        return 0;

    }

}

void findWordBoundary(const UChar* chars, int len, int position, int* start, int* end)

{

    UBreakIterator* it = wordBreakIterator(chars, len);

    *end = ubrk_following(it, position);

    if (*end < 0)

        *end = ubrk_last(it);

    *start = ubrk_previous(it);

}

} // namespace WebCore