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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     const RenderObjectChildList* children() const { return &m_children; }
     44     RenderObjectChildList* children() { return &m_children; }
     45 
     46     void clearPreferredLogicalWidthsDirtyBits();
     47 
     48     unsigned span() const { return m_span; }
     49     void setSpan(unsigned span) { m_span = span; }
     50 
     51     bool isTableColumnGroupWithColumnChildren() { return firstChild(); }
     52     bool isTableColumn() const { return style()->display() == TABLE_COLUMN; }
     53     bool isTableColumnGroup() const { return style()->display() == TABLE_COLUMN_GROUP; }
     54 
     55     RenderTableCol* enclosingColumnGroup() const;
     56     RenderTableCol* enclosingColumnGroupIfAdjacentBefore() const
     57     {
     58         if (previousSibling())
     59             return 0;
     60         return enclosingColumnGroup();
     61     }
     62 
     63     RenderTableCol* enclosingColumnGroupIfAdjacentAfter() const
     64     {
     65         if (nextSibling())
     66             return 0;
     67         return enclosingColumnGroup();
     68     }
     69 
     70 
     71     // Returns the next column or column-group.
     72     RenderTableCol* nextColumn() const;
     73 
     74     const BorderValue& borderAdjoiningCellStartBorder(const RenderTableCell*) const;
     75     const BorderValue& borderAdjoiningCellEndBorder(const RenderTableCell*) const;
     76     const BorderValue& borderAdjoiningCellBefore(const RenderTableCell*) const;
     77     const BorderValue& borderAdjoiningCellAfter(const RenderTableCell*) const;
     78 
     79 private:
     80     virtual RenderObjectChildList* virtualChildren() { return children(); }
     81     virtual const RenderObjectChildList* virtualChildren() const { return children(); }
     82 
     83     virtual const char* renderName() const { return "RenderTableCol"; }
     84     virtual bool isRenderTableCol() const OVERRIDE { return true; }
     85     virtual void updateFromElement();
     86     virtual void computePreferredLogicalWidths() OVERRIDE { ASSERT_NOT_REACHED(); }
     87 
     88     virtual void insertedIntoTree() OVERRIDE;
     89     virtual void willBeRemovedFromTree() OVERRIDE;
     90 
     91     virtual bool isChildAllowed(RenderObject*, RenderStyle*) const;
     92     virtual bool canHaveChildren() const;
     93     virtual bool requiresLayer() const { return false; }
     94 
     95     virtual LayoutRect clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const OVERRIDE;
     96     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0);
     97 
     98     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
     99 
    100     RenderTable* table() const;
    101 
    102     RenderObjectChildList m_children;
    103     unsigned m_span;
    104 };
    105 
    106 inline RenderTableCol* toRenderTableCol(RenderObject* object)
    107 {
    108     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderTableCol());
    109     return static_cast<RenderTableCol*>(object);
    110 }
    111 
    112 inline const RenderTableCol* toRenderTableCol(const RenderObject* object)
    113 {
    114     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderTableCol());
    115     return static_cast<const RenderTableCol*>(object);
    116 }
    117 
    118 // This will catch anyone doing an unnecessary cast.
    119 void toRenderTableCol(const RenderTableCol*);
    120 
    121 }
    122 
    123 #endif
    124