1/*
2 * Copyright (C) 1997 Martin Jones (mjones@kde.org)
3 *           (C) 1997 Torben Weis (weis@kde.org)
4 *           (C) 1998 Waldo Bastian (bastian@kde.org)
5 *           (C) 1999 Lars Knoll (knoll@kde.org)
6 *           (C) 1999 Antti Koivisto (koivisto@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
31namespace blink {
32
33class RenderTable;
34class RenderTableCell;
35
36class RenderTableCol FINAL : public RenderBox {
37public:
38    explicit RenderTableCol(Element*);
39    virtual void trace(Visitor*) OVERRIDE;
40
41    RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
42    RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
43
44    // If you have a RenderTableCol, use firstChild or lastChild instead.
45    void slowFirstChild() const WTF_DELETED_FUNCTION;
46    void slowLastChild() const WTF_DELETED_FUNCTION;
47
48    const RenderObjectChildList* children() const { return &m_children; }
49    RenderObjectChildList* children() { return &m_children; }
50
51    void clearPreferredLogicalWidthsDirtyBits();
52
53    unsigned span() const { return m_span; }
54    void setSpan(unsigned span) { m_span = span; }
55
56    bool isTableColumnGroupWithColumnChildren() { return firstChild(); }
57    bool isTableColumn() const { return style()->display() == TABLE_COLUMN; }
58    bool isTableColumnGroup() const { return style()->display() == TABLE_COLUMN_GROUP; }
59
60    RenderTableCol* enclosingColumnGroup() const;
61    RenderTableCol* enclosingColumnGroupIfAdjacentBefore() const
62    {
63        if (previousSibling())
64            return 0;
65        return enclosingColumnGroup();
66    }
67
68    RenderTableCol* enclosingColumnGroupIfAdjacentAfter() const
69    {
70        if (nextSibling())
71            return 0;
72        return enclosingColumnGroup();
73    }
74
75
76    // Returns the next column or column-group.
77    RenderTableCol* nextColumn() const;
78
79    const BorderValue& borderAdjoiningCellStartBorder(const RenderTableCell*) const;
80    const BorderValue& borderAdjoiningCellEndBorder(const RenderTableCell*) const;
81    const BorderValue& borderAdjoiningCellBefore(const RenderTableCell*) const;
82    const BorderValue& borderAdjoiningCellAfter(const RenderTableCell*) const;
83
84private:
85    virtual RenderObjectChildList* virtualChildren() OVERRIDE { return children(); }
86    virtual const RenderObjectChildList* virtualChildren() const OVERRIDE { return children(); }
87
88    virtual const char* renderName() const OVERRIDE { return "RenderTableCol"; }
89    virtual bool isRenderTableCol() const OVERRIDE { return true; }
90    virtual void updateFromElement() OVERRIDE;
91    virtual void computePreferredLogicalWidths() OVERRIDE { ASSERT_NOT_REACHED(); }
92
93    virtual void insertedIntoTree() OVERRIDE;
94    virtual void willBeRemovedFromTree() OVERRIDE;
95
96    virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE;
97    virtual bool canHaveChildren() const OVERRIDE;
98    virtual LayerType layerTypeRequired() const OVERRIDE { return NoLayer; }
99
100    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0) const OVERRIDE;
101    virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) OVERRIDE;
102
103    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
104
105    RenderTable* table() const;
106
107    RenderObjectChildList m_children;
108    unsigned m_span;
109};
110
111DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableCol, isRenderTableCol());
112
113}
114
115#endif
116