1 /* 2 * Copyright (C) 2009 Apple 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 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 RenderObjectChildList_h 27 #define RenderObjectChildList_h 28 29 #include "platform/heap/Handle.h" 30 #include "wtf/Forward.h" 31 32 namespace blink { 33 34 class RenderObject; 35 36 class RenderObjectChildList { 37 DISALLOW_ALLOCATION(); 38 public: 39 RenderObjectChildList() 40 : m_firstChild(nullptr) 41 , m_lastChild(nullptr) 42 { 43 } 44 void trace(Visitor*); 45 46 RenderObject* firstChild() const { return m_firstChild.get(); } 47 RenderObject* lastChild() const { return m_lastChild.get(); } 48 49 // FIXME: Temporary while RenderBox still exists. Eventually this will just happen during insert/append/remove methods on the child list, and nobody 50 // will need to manipulate firstChild or lastChild directly. 51 void setFirstChild(RenderObject* child) { m_firstChild = child; } 52 void setLastChild(RenderObject* child) { m_lastChild = child; } 53 54 void destroyLeftoverChildren(); 55 56 RenderObject* removeChildNode(RenderObject* owner, RenderObject*, bool notifyRenderer = true); 57 void insertChildNode(RenderObject* owner, RenderObject* newChild, RenderObject* beforeChild, bool notifyRenderer = true); 58 void appendChildNode(RenderObject* owner, RenderObject* newChild, bool notifyRenderer = true) 59 { 60 insertChildNode(owner, newChild, 0, notifyRenderer); 61 } 62 63 private: 64 void invalidatePaintOnRemoval(const RenderObject& oldChild); 65 66 RawPtrWillBeMember<RenderObject> m_firstChild; 67 RawPtrWillBeMember<RenderObject> m_lastChild; 68 }; 69 70 } // namespace blink 71 72 #endif // RenderObjectChildList_h 73
