1 /* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef OrderIterator_h 32 #define OrderIterator_h 33 34 #include "wtf/Noncopyable.h" 35 #include "wtf/Vector.h" 36 37 #include <set> 38 39 namespace WebCore { 40 41 class RenderBox; 42 43 class OrderIterator { 44 WTF_MAKE_NONCOPYABLE(OrderIterator); 45 public: 46 friend class OrderIteratorPopulator; 47 48 OrderIterator(const RenderBox*); 49 50 RenderBox* currentChild() const { return m_currentChild; } 51 RenderBox* first(); 52 RenderBox* next(); 53 void reset(); 54 55 private: 56 const RenderBox* m_containerBox; 57 58 RenderBox* m_currentChild; 59 60 typedef std::set<int> OrderValues; 61 OrderValues m_orderValues; 62 OrderValues::const_iterator m_orderValuesIterator; 63 bool m_isReset; 64 }; 65 66 class OrderIteratorPopulator { 67 public: 68 explicit OrderIteratorPopulator(OrderIterator& iterator) 69 : m_iterator(iterator) 70 { 71 m_iterator.m_orderValues.clear(); 72 } 73 74 ~OrderIteratorPopulator(); 75 76 void collectChild(const RenderBox*); 77 78 private: 79 OrderIterator& m_iterator; 80 }; 81 82 } // namespace WebCore 83 84 #endif // OrderIterator_h 85
