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 36 #include <set> 37 38 namespace blink { 39 40 class RenderBox; 41 42 class OrderIterator { 43 WTF_MAKE_NONCOPYABLE(OrderIterator); 44 public: 45 friend class OrderIteratorPopulator; 46 47 OrderIterator(const RenderBox*); 48 49 RenderBox* currentChild() const { return m_currentChild; } 50 RenderBox* first(); 51 RenderBox* next(); 52 void reset(); 53 54 private: 55 const RenderBox* m_containerBox; 56 57 RenderBox* m_currentChild; 58 59 typedef std::set<int> OrderValues; 60 OrderValues m_orderValues; 61 OrderValues::const_iterator m_orderValuesIterator; 62 bool m_isReset; 63 }; 64 65 class OrderIteratorPopulator { 66 public: 67 explicit OrderIteratorPopulator(OrderIterator& iterator) 68 : m_iterator(iterator) 69 { 70 m_iterator.m_orderValues.clear(); 71 } 72 73 ~OrderIteratorPopulator(); 74 75 void collectChild(const RenderBox*); 76 77 private: 78 OrderIterator& m_iterator; 79 }; 80 81 } // namespace blink 82 83 #endif // OrderIterator_h 84
