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/*
* (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2007-2009 Torch Mobile, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "TextBreakIterator.h"
namespace WebCore {
unsigned numGraphemeClusters(const String& s)
{
unsigned stringLength = s.length();
if (!stringLength)
return 0;
// The only Latin-1 Extended Grapheme Cluster is CR LF
if (s.is8Bit() && !s.contains('\r'))
return stringLength;
NonSharedCharacterBreakIterator it(s.characters(), stringLength);
if (!it)
return stringLength;
unsigned num = 0;
while (textBreakNext(it) != TextBreakDone)
++num;
return num;
}
unsigned numCharactersInGraphemeClusters(const String& s, unsigned numGraphemeClusters)
{
unsigned stringLength = s.length();
if (!stringLength)
return 0;
// The only Latin-1 Extended Grapheme Cluster is CR LF
if (s.is8Bit() && !s.contains('\r'))
return std::min(stringLength, numGraphemeClusters);
NonSharedCharacterBreakIterator it(s.characters(), stringLength);
if (!it)
return std::min(stringLength, numGraphemeClusters);
for (unsigned i = 0; i < numGraphemeClusters; ++i) {
if (textBreakNext(it) == TextBreakDone)
return stringLength;
}
return textBreakCurrent(it);
}
#if !USE(ICU_UNICODE)
TextBreakIterator* acquireLineBreakIterator(const LChar* string, int length, const AtomicString& locale, const UChar* priorContext, unsigned priorContextLength)
{
Vector<UChar> utf16string(length);
for (int i = 0; i < length; ++i)
utf16string[i] = string[i];
return acquireLineBreakIterator(utf16string.data(), length, locale, priorContext, priorContextLength);
}
#endif
} // namespace WebCore
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