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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/
#ifndef CPLUSPLUS_BACKWARDSSCANNER_H
#define CPLUSPLUS_BACKWARDSSCANNER_H
#include "SimpleLexer.h"
#include <QtGui/QTextCursor>
#include <QtGui/QTextBlock>
namespace CPlusPlus {
class CPLUSPLUS_EXPORT BackwardsScanner
{
enum { MAX_BLOCK_COUNT = 10 };
public:
BackwardsScanner(const QTextCursor &cursor,
const QString &suffix = QString(),
int maxBlockCount = MAX_BLOCK_COUNT);
int state() const;
int startToken() const;
int startPosition() const;
QString text() const;
QString mid(int index) const;
QString text(int index) const;
QStringRef textRef(int index) const;
// 1-based
SimpleToken LA(int index) const;
// n-la token is [startToken - n]
SimpleToken operator[](int index) const; // ### deprecate
QString indentationString(int index) const;
int startOfLine(int index) const;
int startOfMatchingBrace(int index) const;
int startOfBlock(int index) const;
static int previousBlockState(const QTextBlock &block);
int size() const;
private:
const SimpleToken &fetchToken(int tokenIndex);
private:
QList<SimpleToken> _tokens;
int _offset;
int _blocksTokenized;
QTextBlock _block;
QString _text;
SimpleLexer _tokenize;
int _maxBlockCount;
int _startToken;
};
} // end of namespace CPlusPlus
#endif // CPLUSPLUS_BACKWARDSSCANNER_H
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