1 /* 2 * Copyright (C) 2007 Alexey Proskuryakov <ap (at) webkit.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef XPathNodeSet_h 27 #define XPathNodeSet_h 28 29 #include "core/dom/Node.h" 30 #include "wtf/Forward.h" 31 #include "wtf/Vector.h" 32 33 namespace WebCore { 34 35 namespace XPath { 36 37 class NodeSet : public NoBaseWillBeGarbageCollected<NodeSet> { 38 WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED; 39 public: 40 static PassOwnPtrWillBeRawPtr<NodeSet> create() { return adoptPtrWillBeNoop(new NodeSet); } 41 static PassOwnPtrWillBeRawPtr<NodeSet> create(const NodeSet&); 42 void trace(Visitor* visitor) { visitor->trace(m_nodes); } 43 44 size_t size() const { return m_nodes.size(); } 45 bool isEmpty() const { return !m_nodes.size(); } 46 Node* operator[](unsigned i) const { return m_nodes.at(i).get(); } 47 void reserveCapacity(size_t newCapacity) { m_nodes.reserveCapacity(newCapacity); } 48 void clear() { m_nodes.clear(); } 49 void swap(NodeSet& other) { std::swap(m_isSorted, other.m_isSorted); std::swap(m_subtreesAreDisjoint, other.m_subtreesAreDisjoint); m_nodes.swap(other.m_nodes); } 50 51 // NodeSet itself does not verify that nodes in it are unique. 52 void append(PassRefPtrWillBeRawPtr<Node> node) { m_nodes.append(node); } 53 void append(const NodeSet& nodeSet) { m_nodes.appendVector(nodeSet.m_nodes); } 54 55 // Returns the set's first node in document order, or 0 if the set is empty. 56 Node* firstNode() const; 57 58 // Returns 0 if the set is empty. 59 Node* anyNode() const; 60 61 // NodeSet itself doesn't check if it contains nodes in document order - the 62 // caller should tell it if it does not. 63 void markSorted(bool isSorted) { m_isSorted = isSorted; } 64 bool isSorted() const { return m_isSorted || m_nodes.size() < 2; } 65 66 void sort() const; 67 68 // No node in the set is ancestor of another. Unlike m_isSorted, this is 69 // assumed to be false, unless the caller sets it to true. 70 void markSubtreesDisjoint(bool disjoint) { m_subtreesAreDisjoint = disjoint; } 71 bool subtreesAreDisjoint() const { return m_subtreesAreDisjoint || m_nodes.size() < 2; } 72 73 void reverse(); 74 75 private: 76 NodeSet() : m_isSorted(true), m_subtreesAreDisjoint(false) { } 77 void traversalSort() const; 78 79 bool m_isSorted; 80 bool m_subtreesAreDisjoint; 81 WillBeHeapVector<RefPtrWillBeMember<Node> > m_nodes; 82 }; 83 84 } 85 86 } 87 #endif // XPathNodeSet_h 88
