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      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 "wtf/Forward.h"
     30 
     31 namespace WebCore {
     32 
     33 class RenderObject;
     34 
     35 class RenderObjectChildList {
     36 public:
     37     RenderObjectChildList()
     38         : m_firstChild(0)
     39         , m_lastChild(0)
     40     {
     41     }
     42 
     43     RenderObject* firstChild() const { return m_firstChild; }
     44     RenderObject* lastChild() const { return m_lastChild; }
     45 
     46     // FIXME: Temporary while RenderBox still exists. Eventually this will just happen during insert/append/remove methods on the child list, and nobody
     47     // will need to manipulate firstChild or lastChild directly.
     48     void setFirstChild(RenderObject* child) { m_firstChild = child; }
     49     void setLastChild(RenderObject* child) { m_lastChild = child; }
     50 
     51     void destroyLeftoverChildren();
     52 
     53     RenderObject* removeChildNode(RenderObject* owner, RenderObject*, bool notifyRenderer = true);
     54     void insertChildNode(RenderObject* owner, RenderObject* newChild, RenderObject* beforeChild, bool notifyRenderer = true);
     55     void appendChildNode(RenderObject* owner, RenderObject* newChild, bool notifyRenderer = true)
     56     {
     57         insertChildNode(owner, newChild, 0, notifyRenderer);
     58     }
     59 
     60 private:
     61     RenderObject* m_firstChild;
     62     RenderObject* m_lastChild;
     63 };
     64 
     65 } // namespace WebCore
     66 
     67 #endif // RenderObjectChildList_h
     68