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/****************************************************************************
**
** Copyright (C) 2001-2004 Roberto Raggi
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the qt3to4 porting application of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef TOKENSTREAMADAPTER_H
#define TOKENSTREAMADAPTER_H
#include "tokenengine.h"
#include "tokens.h"
#include <QVector>
QT_BEGIN_NAMESPACE
namespace TokenStreamAdapter {
struct TokenStream
{
TokenStream(TokenEngine::TokenSectionSequence translationUnit, QVector<Type> tokenKindList)
:m_translationUnit(translationUnit),
m_tokenKindList(tokenKindList),
m_cursor(0),
m_numTokens(tokenKindList.count())
{
Q_ASSERT(translationUnit.count() == m_numTokens);
// Copy out the container and containerIndex for each token so we can have
// constant time random access to it.
TokenEngine::TokenSectionSequenceIterator it(translationUnit);
while(it.nextToken()) {
m_tokenContainers.append(it.tokenContainer());
m_containerIndices.append(it.containerIndex());
}
}
bool isHidden(int index) const
{
if(index >= m_numTokens)
return false;
QT_PREPEND_NAMESPACE(Type) type = m_tokenKindList.at(index);
return (type == Token_whitespaces || type == 10 /*newline*/ ||
type == Token_comment || type == Token_preproc );
}
inline int lookAhead(int n = 0) const
{
if(m_cursor + n >= m_numTokens)
return 0;
return m_tokenKindList.at(m_cursor + n);
}
inline int currentToken() const
{ return lookAhead(); }
inline QByteArray currentTokenText() const
{
return tokenText(m_cursor);
}
inline TokenEngine::TokenContainer tokenContainer(int index = 0) const
{
if (index < m_numTokens)
return m_tokenContainers.at(index);
else
return TokenEngine::TokenContainer();
}
inline int containerIndex(int index = 0) const
{
if (index < m_numTokens)
return m_containerIndices.at(index);
else
return -1;
}
inline QByteArray tokenText(int index = 0) const
{
if (index < m_numTokens) {
const TokenEngine::TokenContainer container = tokenContainer(index);
const int cIndex = containerIndex(index);
return container.text(cIndex);
} else {
return QByteArray();
}
}
inline void rewind(int index)
{ m_cursor = index; }
inline int cursor() const
{ return m_cursor; }
inline void nextToken()
{ ++m_cursor; }
inline bool tokenAtEnd()
{ return m_cursor >= m_numTokens; }
TokenEngine::TokenSectionSequence tokenSections() const
{ return m_translationUnit; }
private:
TokenEngine::TokenSectionSequence m_translationUnit;
QVector<Type> m_tokenKindList;
QList<TokenEngine::TokenContainer> m_tokenContainers;
QList<int> m_containerIndices;
int m_cursor;
int m_numTokens;
};
} //namespace TokenStreamAdapter
QT_END_NAMESPACE
#endif
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