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68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
/*
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* Copyright (C) 2012 Apple Inc. All rights reserved.
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* Copyright (C) Research In Motion Limited 2011. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef SKY_ENGINE_PLATFORM_FONTS_LATIN1TEXTITERATOR_H_
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#define SKY_ENGINE_PLATFORM_FONTS_LATIN1TEXTITERATOR_H_
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#include "sky/engine/wtf/text/WTFString.h"
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namespace blink {
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class Latin1TextIterator {
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public:
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// The passed in LChar pointer starts at 'currentCharacter'. The iterator operates on the range [currentCharacter, lastCharacter].
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// 'endCharacter' denotes the maximum length of the UChar array, which might exceed 'lastCharacter'.
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Latin1TextIterator(const LChar* characters, int currentCharacter, int lastCharacter, int /*endCharacter*/)
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: m_characters(characters)
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, m_currentCharacter(currentCharacter)
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, m_lastCharacter(lastCharacter)
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{
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}
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bool consume(UChar32& character, unsigned& clusterLength)
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{
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if (m_currentCharacter >= m_lastCharacter)
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return false;
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character = *m_characters;
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clusterLength = 1;
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return true;
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}
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void advance(unsigned advanceLength)
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{
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m_characters += advanceLength;
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m_currentCharacter += advanceLength;
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}
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int currentCharacter() const { return m_currentCharacter; }
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const LChar* characters() const { return m_characters; }
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private:
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const LChar* m_characters;
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int m_currentCharacter;
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int m_lastCharacter;
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};
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} // namespace blink
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#endif // SKY_ENGINE_PLATFORM_FONTS_LATIN1TEXTITERATOR_H_
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