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 <wtf/Forward.h> 30 #include <wtf/Vector.h> 31 32 #include "core/dom/Node.h" 33 34 namespace WebCore { 35 36 namespace XPath { 37 38 class NodeSet { 39 WTF_MAKE_FAST_ALLOCATED; 40 public: 41 NodeSet() : m_isSorted(true), m_subtreesAreDisjoint(false) { } 42 43 size_t size() const { return m_nodes.size(); } 44 bool isEmpty() const { return !m_nodes.size(); } 45 Node* operator[](unsigned i) const { return m_nodes.at(i).get(); } 46 void reserveCapacity(size_t newCapacity) { m_nodes.reserveCapacity(newCapacity); } 47 void clear() { m_nodes.clear(); } 48 void swap(NodeSet& other) { std::swap(m_isSorted, other.m_isSorted); std::swap(m_subtreesAreDisjoint, other.m_subtreesAreDisjoint); m_nodes.swap(other.m_nodes); } 49 50 // NodeSet itself does not verify that nodes in it are unique. 51 void append(Node* node) { m_nodes.append(node); } 52 void append(PassRefPtr<Node> node) { m_nodes.append(node); } 53 void append(const NodeSet& nodeSet) { m_nodes.append(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 caller should tell it if it does not. 62 void markSorted(bool isSorted) { m_isSorted = isSorted; } 63 bool isSorted() const { return m_isSorted || m_nodes.size() < 2; } 64 65 void sort() const; 66 67 // 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. 68 void markSubtreesDisjoint(bool disjoint) { m_subtreesAreDisjoint = disjoint; } 69 bool subtreesAreDisjoint() const { return m_subtreesAreDisjoint || m_nodes.size() < 2; } 70 71 void reverse(); 72 73 private: 74 void traversalSort() const; 75 76 bool m_isSorted; 77 bool m_subtreesAreDisjoint; 78 Vector<RefPtr<Node> > m_nodes; 79 }; 80 81 } 82 } 83 84 #endif // XPathNodeSet_h 85
