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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 "RenderStyleConstants.h"
     30 #include <wtf/Forward.h>
     31 
     32 namespace WebCore {
     33 
     34 class RenderObject;
     35 
     36 class RenderObjectChildList {
     37 public:
     38     RenderObjectChildList()
     39         : m_firstChild(0)
     40         , m_lastChild(0)
     41     {
     42     }
     43 
     44     RenderObject* firstChild() const { return m_firstChild; }
     45     RenderObject* lastChild() const { return m_lastChild; }
     46 
     47     // FIXME: Temporary while RenderBox still exists. Eventually this will just happen during insert/append/remove methods on the child list, and nobody
     48     // will need to manipulate firstChild or lastChild directly.
     49     void setFirstChild(RenderObject* child) { m_firstChild = child; }
     50     void setLastChild(RenderObject* child) { m_lastChild = child; }
     51 
     52     void destroyLeftoverChildren();
     53 
     54     RenderObject* removeChildNode(RenderObject* owner, RenderObject*, bool fullRemove = true);
     55     void appendChildNode(RenderObject* owner, RenderObject*, bool fullAppend = true);
     56     void insertChildNode(RenderObject* owner, RenderObject* child, RenderObject* before, bool fullInsert = true);
     57 
     58     void updateBeforeAfterContent(RenderObject* owner, PseudoId type, const RenderObject* styledObject = 0);
     59     RenderObject* beforePseudoElementRenderer(const RenderObject* owner) const;
     60     RenderObject* afterPseudoElementRenderer(const RenderObject* owner) const;
     61 
     62 private:
     63     RenderObject* m_firstChild;
     64     RenderObject* m_lastChild;
     65 };
     66 
     67 } // namespace WebCore
     68 
     69 #endif // RenderObjectChildList_h
     70