text: /*
   * (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 "flutter/sky/engine/platform/text/TextBreakIterator.h"
  
  namespace blink {
  
  unsigned numGraphemeClusters(const String& string) {
    unsigned stringLength = string.length();
  
    if (!stringLength)
      return 0;
  
    // The only Latin-1 Extended Grapheme Cluster is CR LF
    if (string.is8Bit() && !string.contains('\r'))
      return stringLength;
  
    NonSharedCharacterBreakIterator it(string);
    if (!it)
      return stringLength;
  
    unsigned num = 0;
    while (it.next() != TextBreakDone)
      ++num;
    return num;
  }
  
  unsigned numCharactersInGraphemeClusters(const String& string,
                                           unsigned numGraphemeClusters) {
    unsigned stringLength = string.length();
  
    if (!stringLength)
      return 0;
  
    // The only Latin-1 Extended Grapheme Cluster is CR LF
    if (string.is8Bit() && !string.contains('\r'))
      return std::min(stringLength, numGraphemeClusters);
  
    NonSharedCharacterBreakIterator it(string);
    if (!it)
      return std::min(stringLength, numGraphemeClusters);
  
    for (unsigned i = 0; i < numGraphemeClusters; ++i) {
      if (it.next() == TextBreakDone)
        return stringLength;
    }
    return it.current();
  }
  
  }  // namespace blink
  