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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 THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_NODE_SET_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_NODE_SET_H_
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
namespace xpath {
class NodeSet final : public GarbageCollected<NodeSet> {
public:
static NodeSet* Create() { return MakeGarbageCollected<NodeSet>(); }
static NodeSet* Create(const NodeSet&);
NodeSet() : is_sorted_(true), subtrees_are_disjoint_(false) {}
void Trace(Visitor* visitor) const { visitor->Trace(nodes_); }
wtf_size_t size() const { return nodes_.size(); }
bool IsEmpty() const { return !nodes_.size(); }
Node* operator[](unsigned i) const { return nodes_.at(i).Get(); }
HeapVector<Member<Node>>::iterator begin() { return nodes_.begin(); }
HeapVector<Member<Node>>::iterator end() { return nodes_.end(); }
HeapVector<Member<Node>>::const_iterator begin() const {
return nodes_.begin();
}
HeapVector<Member<Node>>::const_iterator end() const { return nodes_.end(); }
void ReserveCapacity(wtf_size_t new_capacity) {
nodes_.ReserveCapacity(new_capacity);
}
void clear() { nodes_.clear(); }
void Swap(NodeSet& other) {
std::swap(is_sorted_, other.is_sorted_);
std::swap(subtrees_are_disjoint_, other.subtrees_are_disjoint_);
nodes_.swap(other.nodes_);
}
// NodeSet itself does not verify that nodes in it are unique.
void Append(Node* node) { nodes_.push_back(node); }
void Append(const NodeSet& node_set) { nodes_.AppendVector(node_set.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 is_sorted) { is_sorted_ = is_sorted; }
bool IsSorted() const { return is_sorted_ || 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) {
subtrees_are_disjoint_ = disjoint;
}
bool SubtreesAreDisjoint() const {
return subtrees_are_disjoint_ || nodes_.size() < 2;
}
void Reverse();
private:
void TraversalSort() const;
bool is_sorted_;
bool subtrees_are_disjoint_;
HeapVector<Member<Node>> nodes_;
};
} // namespace xpath
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_NODE_SET_H_
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