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/*
* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
*
* 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 APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. OR
* CONTRIBUTORS 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 XPathNodeSet_h
#define XPathNodeSet_h
#include "core/dom/Node.h"
#include "wtf/Forward.h"
#include "wtf/Vector.h"
namespace blink {
namespace XPath {
class NodeSet final : public GarbageCollected<NodeSet> {
public:
static NodeSet* create() { return new NodeSet; }
static NodeSet* create(const NodeSet&);
DEFINE_INLINE_TRACE() { visitor->trace(m_nodes); }
size_t size() const { return m_nodes.size(); }
bool isEmpty() const { return !m_nodes.size(); }
Node* operator[](unsigned i) const { return m_nodes.at(i).get(); }
HeapVector<Member<Node>>::iterator begin() { return m_nodes.begin(); }
HeapVector<Member<Node>>::iterator end() { return m_nodes.end(); }
HeapVector<Member<Node>>::const_iterator begin() const {
return m_nodes.begin();
}
HeapVector<Member<Node>>::const_iterator end() const { return m_nodes.end(); }
void reserveCapacity(size_t newCapacity) {
m_nodes.reserveCapacity(newCapacity);
}
void clear() { m_nodes.clear(); }
void swap(NodeSet& other) {
std::swap(m_isSorted, other.m_isSorted);
std::swap(m_subtreesAreDisjoint, other.m_subtreesAreDisjoint);
m_nodes.swap(other.m_nodes);
}
// NodeSet itself does not verify that nodes in it are unique.
void append(Node* node) { m_nodes.push_back(node); }
void append(const NodeSet& nodeSet) { m_nodes.appendVector(nodeSet.m_nodes); }
// Returns the set's first node in document order, or 0 if the set is empty.
Node* firstNode() const;
// Returns 0 if the set is empty.
Node* anyNode() const;
// NodeSet itself doesn't check if it contains nodes in document order - the
// caller should tell it if it does not.
void markSorted(bool isSorted) { m_isSorted = isSorted; }
bool isSorted() const { return m_isSorted || m_nodes.size() < 2; }
void sort() const;
// No node in the set is ancestor of another. Unlike m_isSorted, this is
// assumed to be false, unless the caller sets it to true.
void markSubtreesDisjoint(bool disjoint) { m_subtreesAreDisjoint = disjoint; }
bool subtreesAreDisjoint() const {
return m_subtreesAreDisjoint || m_nodes.size() < 2;
}
void reverse();
private:
NodeSet() : m_isSorted(true), m_subtreesAreDisjoint(false) {}
void traversalSort() const;
bool m_isSorted;
bool m_subtreesAreDisjoint;
HeapVector<Member<Node>> m_nodes;
};
} // namespace XPath
} // namespace blink
#endif // XPathNodeSet_h
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