forked from qt-creator/qt-creator
e0e8cf3ada
Change-Id: I7134d7de30bcf9f9dcfad42520dd45ee083a852d Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
93 lines
2.5 KiB
C++
93 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) 2012 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: http://www.qt-project.org/
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**
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**
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** GNU Lesser General Public License Usage
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**
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this file.
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** Please review the following information to ensure the GNU Lesser General
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** Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** Other Usage
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**
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**************************************************************************/
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#ifndef CPLUSPLUS_BACKWARDSSCANNER_H
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#define CPLUSPLUS_BACKWARDSSCANNER_H
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#include "SimpleLexer.h"
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#include <QTextBlock>
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QT_FORWARD_DECLARE_CLASS(QTextCursor)
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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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explicit BackwardsScanner(const QTextCursor &cursor,
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int maxBlockCount = MAX_BLOCK_COUNT,
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const QString &suffix = QString(),
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bool skipComments = true);
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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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Token LA(int index) const;
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// n-la token is [startToken - n]
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Token operator[](int index) const; // ### deprecate
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QString indentationString(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 size() const;
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static int previousBlockState(const QTextBlock &block);
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private:
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const Token &fetchToken(int tokenIndex);
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private:
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QList<Token> _tokens;
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int _offset;
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int _blocksTokenized;
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QTextBlock _block;
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SimpleLexer _tokenize;
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QString _text;
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int _maxBlockCount;
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int _startToken;
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};
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} // namespace CPlusPlus
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#endif // CPLUSPLUS_BACKWARDSSCANNER_H
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