WebCore/RenderContainer.h

   1 /*
   2  * Copyright (C) 2001 Antti Koivisto (koivisto@kde.org)
   3  * Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public License
  16  * along with this library; see the file COPYING.LIB.  If not, write to
  17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA 02110-1301, USA.
  19  */
  20
  21 #ifndef RenderContainer_h
  22 #define RenderContainer_h
  23
  24 #include "RenderBox.h"
  25
  26 #include "SelectionRect.h"
  27
  28 namespace WebCore {
  29
  30 // Base class for rendering objects that can have children.
  31 class RenderContainer : public RenderBox {
  32 public:
  33     RenderContainer(Node*);
  34     virtual ~RenderContainer();
  35
  36     virtual RenderObject* firstChild() const { return m_firstChild; }
  37     virtual RenderObject* lastChild() const { return m_lastChild; }
  38
  39     // Use this with caution! No type checking is done!
  40     RenderBox* firstChildBox() const { ASSERT(!firstChild() || firstChild()->isBox()); return toRenderBox(m_firstChild); }
  41     RenderBox* lastChildBox() const { ASSERT(!lastChild() || lastChild()->isBox()); return toRenderBox(m_lastChild); }
  42
  43     virtual bool canHaveChildren() const;
  44     virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0);
  45     virtual void removeChild(RenderObject*);
  46
  47     virtual void destroy();
  48     void destroyLeftoverChildren();
  49
  50     virtual RenderObject* removeChildNode(RenderObject*, bool fullRemove = true);
  51     virtual void appendChildNode(RenderObject*, bool fullAppend = true);
  52     virtual void insertChildNode(RenderObject* child, RenderObject* before, bool fullInsert = true);
  53
  54     // Designed for speed.  Don't waste time doing a bunch of work like layer updating and repainting when we know that our
  55     // change in parentage is not going to affect anything.
  56     virtual void moveChildNode(RenderObject* child) { appendChildNode(child->parent()->removeChildNode(child, false), false); }
  57
  58     virtual void layout();
  59     virtual void calcPrefWidths() { setPrefWidthsDirty(false); }
  60
  61     virtual void removeLeftoverAnonymousBlock(RenderBlock* child);
  62
  63     RenderObject* beforeAfterContainer(RenderStyle::PseudoId);
  64     virtual void updateBeforeAfterContent(RenderStyle::PseudoId);
  65     void updateBeforeAfterContentForContainer(RenderStyle::PseudoId, RenderContainer*);
  66     bool isAfterContent(RenderObject* child) const;
  67     virtual void invalidateCounters();
  68
  69     virtual VisiblePosition positionForCoordinates(int x, int y);
  70
  71     virtual void addLineBoxRects(Vector<IntRect>&, unsigned startOffset = 0, unsigned endOffset = UINT_MAX, bool useSelectionHeight = false);
  72     virtual void collectAbsoluteLineBoxQuads(Vector<FloatQuad>&, unsigned startOffset = 0, unsigned endOffset = UINT_MAX, bool useSelectionHeight = false);
  73     virtual void collectSelectionRects(Vector<SelectionRect>&, unsigned startOffset = 0, unsigned endOffset = UINT_MAX);
  74
  75 protected:
  76     RenderObject* m_firstChild;
  77     RenderObject* m_lastChild;
  78 };
  79
  80 } // namespace WebCore
  81
  82 #endif // RenderContainer_h