forked from qt-creator/qt-creator
d63624afe0
Change-Id: Id97ca27fa909979573efca12dc0cd14b28eacd17 Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>
94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the 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 The Qt Company. For licensing terms and
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** conditions see http://www.qt.io/terms-conditions. For further information
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** use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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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 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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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, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company 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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****************************************************************************/
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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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BackwardsScanner(const QTextCursor &cursor,
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const LanguageFeatures &languageFeatures,
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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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Tokens _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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