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/*
* Copyright (C) 2012 Apple Inc. All rights reserved.
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
*
* 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.
*
*/
#ifndef Latin1TextIterator_h
#define Latin1TextIterator_h
#include "wtf/text/WTFString.h"
namespace WebCore {
class Latin1TextIterator {
public:
// The passed in LChar pointer starts at 'currentCharacter'. The iterator operates on the range [currentCharacter, lastCharacter].
// 'endCharacter' denotes the maximum length of the UChar array, which might exceed 'lastCharacter'.
Latin1TextIterator(const LChar* characters, int currentCharacter, int lastCharacter, int /*endCharacter*/)
: m_characters(characters)
, m_currentCharacter(currentCharacter)
, m_lastCharacter(lastCharacter)
{
}
bool consume(UChar32& character, unsigned& clusterLength)
{
if (m_currentCharacter >= m_lastCharacter)
return false;
character = *m_characters;
clusterLength = 1;
return true;
}
void advance(unsigned advanceLength)
{
m_characters += advanceLength;
m_currentCharacter += advanceLength;
}
int currentCharacter() const { return m_currentCharacter; }
const LChar* characters() const { return m_characters; }
private:
const LChar* m_characters;
int m_currentCharacter;
int m_lastCharacter;
};
}
#endif
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