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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  *
      9  * This library is free software; you can redistribute it and/or
     10  * modify it under the terms of the GNU Library General Public
     11  * License as published by the Free Software Foundation; either
     12  * version 2 of the License, or (at your option) any later version.
     13  *
     14  * This library is distributed in the hope that it will be useful,
     15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     17  * Library General Public License for more details.
     18  *
     19  * You should have received a copy of the GNU Library General Public License
     20  * along with this library; see the file COPYING.LIB.  If not, write to
     21  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     22  * Boston, MA 02110-1301, USA.
     23  */
     24 
     25 #ifndef RenderTableSection_h
     26 #define RenderTableSection_h
     27 
     28 #include "RenderTable.h"
     29 #include <wtf/Vector.h>
     30 
     31 namespace WebCore {
     32 
     33 class RenderTableCell;
     34 class RenderTableRow;
     35 
     36 class RenderTableSection : public RenderBox {
     37 public:
     38     RenderTableSection(Node*);
     39     virtual ~RenderTableSection();
     40 
     41     const RenderObjectChildList* children() const { return &m_children; }
     42     RenderObjectChildList* children() { return &m_children; }
     43 
     44     virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0);
     45 
     46     virtual int firstLineBoxBaseline() const;
     47 
     48     void addCell(RenderTableCell*, RenderTableRow* row);
     49 
     50     void setCellLogicalWidths();
     51     int calcRowLogicalHeight();
     52     int layoutRows(int logicalHeight);
     53 
     54     RenderTable* table() const { return toRenderTable(parent()); }
     55 
     56     struct CellStruct {
     57         Vector<RenderTableCell*, 1> cells;
     58         bool inColSpan; // true for columns after the first in a colspan
     59 
     60         CellStruct():
     61           inColSpan(false) {}
     62 
     63         RenderTableCell* primaryCell()
     64         {
     65             return hasCells() ? cells[cells.size() - 1] : 0;
     66         }
     67 
     68         const RenderTableCell* primaryCell() const
     69         {
     70             return hasCells() ? cells[cells.size() - 1] : 0;
     71         }
     72 
     73         bool hasCells() const { return cells.size() > 0; }
     74     };
     75 
     76     typedef Vector<CellStruct> Row;
     77 
     78     struct RowStruct {
     79         Row* row;
     80         RenderTableRow* rowRenderer;
     81         int baseline;
     82         Length logicalHeight;
     83     };
     84 
     85     CellStruct& cellAt(int row,  int col) { return (*m_grid[row].row)[col]; }
     86     const CellStruct& cellAt(int row, int col) const { return (*m_grid[row].row)[col]; }
     87     RenderTableCell* primaryCellAt(int row, int col)
     88     {
     89         CellStruct& c = (*m_grid[row].row)[col];
     90         return c.primaryCell();
     91     }
     92 
     93     void appendColumn(int pos);
     94     void splitColumn(int pos, int first);
     95 
     96     int calcOuterBorderBefore() const;
     97     int calcOuterBorderAfter() const;
     98     int calcOuterBorderStart() const;
     99     int calcOuterBorderEnd() const;
    100     void recalcOuterBorder();
    101 
    102     int outerBorderBefore() const { return m_outerBorderBefore; }
    103     int outerBorderAfter() const { return m_outerBorderAfter; }
    104     int outerBorderStart() const { return m_outerBorderStart; }
    105     int outerBorderEnd() const { return m_outerBorderEnd; }
    106 
    107     int numRows() const { return m_gridRows; }
    108     int numColumns() const;
    109     void recalcCells();
    110     void recalcCellsIfNeeded()
    111     {
    112         if (m_needsCellRecalc)
    113             recalcCells();
    114     }
    115 
    116     bool needsCellRecalc() const { return m_needsCellRecalc; }
    117     void setNeedsCellRecalc();
    118 
    119     int getBaseline(int row) { return m_grid[row].baseline; }
    120 
    121 protected:
    122     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
    123 
    124 private:
    125     virtual RenderObjectChildList* virtualChildren() { return children(); }
    126     virtual const RenderObjectChildList* virtualChildren() const { return children(); }
    127 
    128     virtual const char* renderName() const { return isAnonymous() ? "RenderTableSection (anonymous)" : "RenderTableSection"; }
    129 
    130     virtual bool isTableSection() const { return true; }
    131 
    132     virtual void destroy();
    133 
    134     virtual void layout();
    135 
    136     virtual void removeChild(RenderObject* oldChild);
    137 
    138     virtual void paint(PaintInfo&, int tx, int ty);
    139     virtual void paintCell(RenderTableCell*, PaintInfo&, int tx, int ty);
    140     virtual void paintObject(PaintInfo&, int tx, int ty);
    141 
    142     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0);
    143 
    144     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
    145 
    146     bool ensureRows(int);
    147     void clearGrid();
    148 
    149     RenderObjectChildList m_children;
    150 
    151     Vector<RowStruct> m_grid;
    152     Vector<int> m_rowPos;
    153 
    154     int m_gridRows;
    155 
    156     // the current insertion position
    157     int m_cCol;
    158     int m_cRow;
    159 
    160     int m_outerBorderStart;
    161     int m_outerBorderEnd;
    162     int m_outerBorderBefore;
    163     int m_outerBorderAfter;
    164 
    165     bool m_needsCellRecalc;
    166     bool m_hasOverflowingCell;
    167 
    168     bool m_hasMultipleCellLevels;
    169 };
    170 
    171 inline RenderTableSection* toRenderTableSection(RenderObject* object)
    172 {
    173     ASSERT(!object || object->isTableSection());
    174     return static_cast<RenderTableSection*>(object);
    175 }
    176 
    177 inline const RenderTableSection* toRenderTableSection(const RenderObject* object)
    178 {
    179     ASSERT(!object || object->isTableSection());
    180     return static_cast<const RenderTableSection*>(object);
    181 }
    182 
    183 // This will catch anyone doing an unnecessary cast.
    184 void toRenderTableSection(const RenderTableSection*);
    185 
    186 } // namespace WebCore
    187 
    188 #endif // RenderTableSection_h
    189