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      1 /*
      2  * Copyright (C) 1997 Martin Jones (mjones (at) kde.org)
      3  *           (C) 1997 Torben Weis (weis (at) kde.org)
      4  *           (C) 1998 Waldo Bastian (bastian (at) kde.org)
      5  *           (C) 1999 Lars Knoll (knoll (at) kde.org)
      6  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      7  * Copyright (C) 2003, 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
      8  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
      9  *
     10  * This library is free software; you can redistribute it and/or
     11  * modify it under the terms of the GNU Library General Public
     12  * License as published by the Free Software Foundation; either
     13  * version 2 of the License, or (at your option) any later version.
     14  *
     15  * This library is distributed in the hope that it will be useful,
     16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     18  * Library General Public License for more details.
     19  *
     20  * You should have received a copy of the GNU Library General Public License
     21  * along with this library; see the file COPYING.LIB.  If not, write to
     22  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     23  * Boston, MA 02110-1301, USA.
     24  */
     25 
     26 #ifndef RenderTableCol_h
     27 #define RenderTableCol_h
     28 
     29 #include "core/rendering/RenderBox.h"
     30 
     31 namespace WebCore {
     32 
     33 class RenderTable;
     34 class RenderTableCell;
     35 
     36 class RenderTableCol FINAL : public RenderBox {
     37 public:
     38     explicit RenderTableCol(Element*);
     39 
     40     RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     41     RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
     42 
     43     // If you have a RenderTableCol, use firstChild or lastChild instead.
     44     void slowFirstChild() const WTF_DELETED_FUNCTION;
     45     void slowLastChild() const WTF_DELETED_FUNCTION;
     46 
     47     const RenderObjectChildList* children() const { return &m_children; }
     48     RenderObjectChildList* children() { return &m_children; }
     49 
     50     void clearPreferredLogicalWidthsDirtyBits();
     51 
     52     unsigned span() const { return m_span; }
     53     void setSpan(unsigned span) { m_span = span; }
     54 
     55     bool isTableColumnGroupWithColumnChildren() { return firstChild(); }
     56     bool isTableColumn() const { return style()->display() == TABLE_COLUMN; }
     57     bool isTableColumnGroup() const { return style()->display() == TABLE_COLUMN_GROUP; }
     58 
     59     RenderTableCol* enclosingColumnGroup() const;
     60     RenderTableCol* enclosingColumnGroupIfAdjacentBefore() const
     61     {
     62         if (previousSibling())
     63             return 0;
     64         return enclosingColumnGroup();
     65     }
     66 
     67     RenderTableCol* enclosingColumnGroupIfAdjacentAfter() const
     68     {
     69         if (nextSibling())
     70             return 0;
     71         return enclosingColumnGroup();
     72     }
     73 
     74 
     75     // Returns the next column or column-group.
     76     RenderTableCol* nextColumn() const;
     77 
     78     const BorderValue& borderAdjoiningCellStartBorder(const RenderTableCell*) const;
     79     const BorderValue& borderAdjoiningCellEndBorder(const RenderTableCell*) const;
     80     const BorderValue& borderAdjoiningCellBefore(const RenderTableCell*) const;
     81     const BorderValue& borderAdjoiningCellAfter(const RenderTableCell*) const;
     82 
     83 private:
     84     virtual RenderObjectChildList* virtualChildren() OVERRIDE { return children(); }
     85     virtual const RenderObjectChildList* virtualChildren() const OVERRIDE { return children(); }
     86 
     87     virtual const char* renderName() const OVERRIDE { return "RenderTableCol"; }
     88     virtual bool isRenderTableCol() const OVERRIDE { return true; }
     89     virtual void updateFromElement() OVERRIDE;
     90     virtual void computePreferredLogicalWidths() OVERRIDE { ASSERT_NOT_REACHED(); }
     91 
     92     virtual void insertedIntoTree() OVERRIDE;
     93     virtual void willBeRemovedFromTree() OVERRIDE;
     94 
     95     virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE;
     96     virtual bool canHaveChildren() const OVERRIDE;
     97     virtual LayerType layerTypeRequired() const OVERRIDE { return NoLayer; }
     98 
     99     virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer) const OVERRIDE;
    100     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) OVERRIDE;
    101 
    102     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
    103 
    104     RenderTable* table() const;
    105 
    106     RenderObjectChildList m_children;
    107     unsigned m_span;
    108 };
    109 
    110 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableCol, isRenderTableCol());
    111 
    112 }
    113 
    114 #endif
    115