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/*
* Copyright 2005 Frerich Raabe <raabe@kde.org>
* Copyright (C) 2006 Apple Computer, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef XPathStep_h
#define XPathStep_h
#if ENABLE(XPATH)
#include "Node.h"
#include "XPathExpressionNode.h"
#include "XPathNodeSet.h"
namespace WebCore {
namespace XPath {
class Predicate;
class Step : public ParseNode, Noncopyable {
public:
enum Axis {
AncestorAxis, AncestorOrSelfAxis, AttributeAxis,
ChildAxis, DescendantAxis, DescendantOrSelfAxis,
FollowingAxis, FollowingSiblingAxis, NamespaceAxis,
ParentAxis, PrecedingAxis, PrecedingSiblingAxis,
SelfAxis
};
class NodeTest {
public:
enum Kind {
TextNodeTest, CommentNodeTest, ProcessingInstructionNodeTest, AnyNodeTest, NameTest,
ElementNodeTest // XPath 2.0
};
NodeTest(Kind kind) : m_kind(kind) {}
NodeTest(Kind kind, const String& data) : m_kind(kind), m_data(data) {}
NodeTest(Kind kind, const String& data, const String& namespaceURI) : m_kind(kind), m_data(data), m_namespaceURI(namespaceURI) {}
Kind kind() const { return m_kind; }
const String data() const { return m_data; }
const String namespaceURI() const { return m_namespaceURI; }
private:
Kind m_kind;
String m_data;
String m_namespaceURI;
};
Step(Axis, const NodeTest& nodeTest, const Vector<Predicate*>& predicates = Vector<Predicate*>());
~Step();
void evaluate(Node* context, NodeSet&) const;
Axis axis() const { return m_axis; }
NodeTest nodeTest() const { return m_nodeTest; }
const Vector<Predicate*>& predicates() const { return m_predicates; }
void setAxis(Axis axis) { m_axis = axis; }
void setNodeTest(NodeTest nodeTest) { m_nodeTest = nodeTest; }
void setPredicates(const Vector<Predicate*>& predicates) { m_predicates = predicates; }
private:
void parseNodeTest(const String&);
void nodesInAxis(Node* context, NodeSet&) const;
bool nodeMatches(Node*) const;
String namespaceFromNodetest(const String& nodeTest) const;
Node::NodeType primaryNodeType(Axis) const;
Axis m_axis;
NodeTest m_nodeTest;
Vector<Predicate*> m_predicates;
};
}
}
#endif // ENABLE(XPATH)
#endif // XPath_Step_H
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