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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
//
// 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 <private/qitem_p.h>
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)
{
Q_ASSERT(test);
Q_UNUSED(test);
Q_UNUSED(axis);
}
virtual Action actionForElement(const QXmlName name,
ProjectedExpression::Ptr &next) const
{
Q_UNUSED(name);
Q_UNUSED(next);
// TODO
return Skip;
}
private:
};
class ProjectedPath : public ProjectedExpression
{
public:
ProjectedPath(const ProjectedExpression::Ptr left,
const ProjectedExpression::Ptr right) : m_left(left)
{
Q_ASSERT(m_left);
Q_ASSERT(right);
Q_UNUSED(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;
};
}
QT_END_NAMESPACE
#endif
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