forked from qt-creator/qt-creator
89 lines
2.5 KiB
C++
89 lines
2.5 KiB
C++
/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#ifndef BACKWARDSSCANNER_H
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#define BACKWARDSSCANNER_H
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#include "SimpleLexer.h"
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#include <QtGui/QTextCursor>
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#include <QtGui/QTextBlock>
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namespace CPlusPlus {
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class CPLUSPLUS_EXPORT BackwardsScanner
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{
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enum { MAX_BLOCK_COUNT = 10 };
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public:
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BackwardsScanner(const QTextCursor &cursor,
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const QString &suffix = QString(),
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int maxBlockCount = MAX_BLOCK_COUNT);
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int state() const;
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int startToken() const;
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int startPosition() const;
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QString text() const;
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QString mid(int index) const;
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QString text(int index) const;
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QStringRef textRef(int index) const;
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// 1-based
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SimpleToken LA(int index) const;
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// n-la token is [startToken - n]
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SimpleToken operator[](int index) const; // ### deprecate
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int indentation(int index) const;
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int startOfLine(int index) const;
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int startOfMatchingBrace(int index) const;
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int startOfBlock(int index) const;
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int previousBlockState(const QTextBlock &block) const;
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private:
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const SimpleToken &fetchToken(int i);
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private:
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QList<SimpleToken> _tokens;
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int _offset;
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int _blocksTokenized;
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QTextBlock _block;
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QString _text;
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SimpleLexer _tokenize;
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int _maxBlockCount;
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int _startToken;
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};
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} // end of namespace CPlusPlus
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#endif // BACKWARDSSCANNER_H
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