Added BackwardsScanner

1 files changed, 66 insertions, 0 deletions

diff --git a/src/libs/cplusplus/BackwardsScanner.h b/src/libs/cplusplus/BackwardsScanner.h
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+++ b/src/libs/cplusplus/BackwardsScanner.h
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+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2009 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 BACKWARDSSCANNER_H
+#define 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, int maxBlockCount = MAX_BLOCK_COUNT);
+
+    QList<SimpleToken> tokens() const;
+    int startPosition() const;
+    const QString &text() const;
+
+    const SimpleToken &operator[](int i);
+    QString text(int begin, int end) const;
+    int previousBlockState(const QTextBlock &block);
+
+private:
+    QList<SimpleToken> _tokens;
+    int _offset;
+    int _blocksTokenized;
+    QTextBlock _block;
+    QString _text;
+    SimpleLexer _tokenize;
+    int _maxBlockCount;
+};
+
+} // end of namespace CPlusPlus
+
+#endif // BACKWARDSSCANNER_H