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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtXmlPatterns module 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#ifndef Patternist_ProjectedExpression_H
#define Patternist_ProjectedExpression_H
#include "qitem_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
class ProjectedExpression
{
public:
typedef ProjectedExpression * Ptr;
typedef QVector<ProjectedExpression::Ptr> Vector;
virtual ~ProjectedExpression()
{
}
enum Action
{
Move = 0,
Skip = 1,
Keep = 2,
KeepSubtree = 4 | Keep
};
virtual Action actionForElement(const QXmlName name,
ProjectedExpression::Ptr &next) const
{
Q_UNUSED(name);
Q_UNUSED(next);
return Skip;
}
};
class ProjectedNodeTest
{
public:
typedef ProjectedNodeTest * Ptr;
virtual ~ProjectedNodeTest()
{
}
virtual bool isMatch(const QXmlNodeModelIndex::NodeKind kind) const
{
Q_UNUSED(kind);
return false;
}
};
class ProjectedStep : public ProjectedExpression
{
public:
ProjectedStep(const ProjectedNodeTest::Ptr test,
const QXmlNodeModelIndex::Axis axis) : m_test(test),
m_axis(axis)
{
Q_ASSERT(m_test);
}
virtual Action actionForElement(const QXmlName name,
ProjectedExpression::Ptr &next) const
{
Q_UNUSED(name);
Q_UNUSED(next);
// TODO
return Skip;
}
private:
const ProjectedNodeTest::Ptr m_test;
const QXmlNodeModelIndex::Axis m_axis;
};
class ProjectedPath : public ProjectedExpression
{
public:
ProjectedPath(const ProjectedExpression::Ptr left,
const ProjectedExpression::Ptr right) : m_left(left),
m_right(right)
{
Q_ASSERT(m_left);
Q_ASSERT(m_right);
}
virtual Action actionForElement(const QXmlName name,
ProjectedExpression::Ptr &next) const
{
ProjectedExpression::Ptr &candidateNext = next;
const Action a = m_left->actionForElement(name, candidateNext);
if(a != Skip)
{
/* The test accepted it, so let's replace us with the new step. */
next = candidateNext;
}
return a;
}
private:
const ProjectedExpression::Ptr m_left;
const ProjectedExpression::Ptr m_right;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
|
