summaryrefslogtreecommitdiff
path: root/Source/WebCore/rendering/RenderTableSection.h
blob: 79cdd4a1da52de9de95b7012f2b80bad1517bcbc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
/*
 * Copyright (C) 1997 Martin Jones (mjones@kde.org)
 *           (C) 1997 Torben Weis (weis@kde.org)
 *           (C) 1998 Waldo Bastian (bastian@kde.org)
 *           (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 * Copyright (C) 2003, 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifndef RenderTableSection_h
#define RenderTableSection_h

#include "RenderTable.h"
#include <wtf/Vector.h>

namespace WebCore {

enum CollapsedBorderSide {
    CBSBefore,
    CBSAfter,
    CBSStart,
    CBSEnd
};

// Helper class for paintObject.
class CellSpan {
public:
    CellSpan(unsigned start, unsigned end)
        : m_start(start)
        , m_end(end)
    {
    }

    unsigned start() const { return m_start; }
    unsigned end() const { return m_end; }

    unsigned& start() { return m_start; }
    unsigned& end() { return m_end; }

private:
    unsigned m_start;
    unsigned m_end;
};

class RenderTableCell;
class RenderTableRow;

class RenderTableSection : public RenderBox {
public:
    RenderTableSection(Node*);
    virtual ~RenderTableSection();

    RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
    RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }

    const RenderObjectChildList* children() const { return &m_children; }
    RenderObjectChildList* children() { return &m_children; }

    virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0);

    virtual int firstLineBoxBaseline() const OVERRIDE;

    void addCell(RenderTableCell*, RenderTableRow* row);

    int calcRowLogicalHeight();
    void layoutRows();

    RenderTable* table() const { return toRenderTable(parent()); }

    struct CellStruct {
        Vector<RenderTableCell*, 1> cells; 
        bool inColSpan; // true for columns after the first in a colspan

        CellStruct()
            : inColSpan(false)
        {
        }

        RenderTableCell* primaryCell()
        {
            return hasCells() ? cells[cells.size() - 1] : 0;
        }

        const RenderTableCell* primaryCell() const
        {
            return hasCells() ? cells[cells.size() - 1] : 0;
        }

        bool hasCells() const { return cells.size() > 0; }
    };

    typedef Vector<CellStruct> Row;

    struct RowStruct {
        RowStruct()
            : rowRenderer(0)
            , baseline()
        {
        }

        Row row;
        RenderTableRow* rowRenderer;
        LayoutUnit baseline;
        Length logicalHeight;
    };

    const BorderValue& borderAdjoiningTableStart() const
    {
        if (hasSameDirectionAs(table()))
            return style()->borderStart();

        return style()->borderEnd();
    }

    const BorderValue& borderAdjoiningTableEnd() const
    {
        if (hasSameDirectionAs(table()))
            return style()->borderEnd();

        return style()->borderStart();
    }

    const BorderValue& borderAdjoiningStartCell(const RenderTableCell*) const;
    const BorderValue& borderAdjoiningEndCell(const RenderTableCell*) const;

    const RenderTableCell* firstRowCellAdjoiningTableStart() const;
    const RenderTableCell* firstRowCellAdjoiningTableEnd() const;

    CellStruct& cellAt(unsigned row,  unsigned col) { return m_grid[row].row[col]; }
    const CellStruct& cellAt(unsigned row, unsigned col) const { return m_grid[row].row[col]; }
    RenderTableCell* primaryCellAt(unsigned row, unsigned col)
    {
        CellStruct& c = m_grid[row].row[col];
        return c.primaryCell();
    }

    void appendColumn(unsigned pos);
    void splitColumn(unsigned pos, unsigned first);

    int calcOuterBorderBefore() const;
    int calcOuterBorderAfter() const;
    int calcOuterBorderStart() const;
    int calcOuterBorderEnd() const;
    void recalcOuterBorder();

    int outerBorderBefore() const { return m_outerBorderBefore; }
    int outerBorderAfter() const { return m_outerBorderAfter; }
    int outerBorderStart() const { return m_outerBorderStart; }
    int outerBorderEnd() const { return m_outerBorderEnd; }

    unsigned numRows() const { return m_grid.size(); }
    unsigned numColumns() const;
    void recalcCells();
    void recalcCellsIfNeeded()
    {
        if (m_needsCellRecalc)
            recalcCells();
    }

    bool needsCellRecalc() const { return m_needsCellRecalc; }
    void setNeedsCellRecalc();

    LayoutUnit rowBaseline(unsigned row) { return m_grid[row].baseline; }

    void rowLogicalHeightChanged(unsigned rowIndex);

    void removeCachedCollapsedBorders(const RenderTableCell*);
    void setCachedCollapsedBorder(const RenderTableCell*, CollapsedBorderSide, CollapsedBorderValue);
    CollapsedBorderValue& cachedCollapsedBorder(const RenderTableCell*, CollapsedBorderSide);

    // distributeExtraLogicalHeightToRows methods return the *consumed* extra logical height.
    // FIXME: We may want to introduce a structure holding the in-flux layout information.
    int distributeExtraLogicalHeightToRows(int extraLogicalHeight);

    static RenderTableSection* createAnonymousWithParentRenderer(const RenderObject*);
    virtual RenderBox* createAnonymousBoxWithSameTypeAs(const RenderObject* parent) const OVERRIDE
    {
        return createAnonymousWithParentRenderer(parent);
    }
    
    virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE;

protected:
    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);

private:
    virtual RenderObjectChildList* virtualChildren() { return children(); }
    virtual const RenderObjectChildList* virtualChildren() const { return children(); }

    virtual const char* renderName() const { return isAnonymous() ? "RenderTableSection (anonymous)" : "RenderTableSection"; }

    virtual bool isTableSection() const { return true; }

    virtual void willBeRemovedFromTree() OVERRIDE;

    virtual void layout();

    virtual void paintCell(RenderTableCell*, PaintInfo&, const LayoutPoint&);
    virtual void paintObject(PaintInfo&, const LayoutPoint&);

    virtual void imageChanged(WrappedImagePtr, const IntRect* = 0);

    virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE;

    void ensureRows(unsigned);

    void distributeExtraLogicalHeightToPercentRows(int& extraLogicalHeight, int totalPercent);
    void distributeExtraLogicalHeightToAutoRows(int& extraLogicalHeight, unsigned autoRowsCount);
    void distributeRemainingExtraLogicalHeight(int& extraLogicalHeight);

    bool hasOverflowingCell() const { return m_overflowingCells.size() || m_forceSlowPaintPathWithOverflowingCell; }

    CellSpan fullTableRowSpan() const { return CellSpan(0, m_grid.size()); }
    CellSpan fullTableColumnSpan() const { return CellSpan(0, table()->columns().size()); }

    // Flip the rect so it aligns with the coordinates used by the rowPos and columnPos vectors.
    LayoutRect logicalRectForWritingModeAndDirection(const LayoutRect&) const;

    CellSpan dirtiedRows(const LayoutRect& repaintRect) const;
    CellSpan dirtiedColumns(const LayoutRect& repaintRect) const;

    // These two functions take a rectangle as input that has been flipped by logicalRectForWritingModeAndDirection.
    // The returned span of rows or columns is end-exclusive, and empty if start==end.
    CellSpan spannedRows(const LayoutRect& flippedRect) const;
    CellSpan spannedColumns(const LayoutRect& flippedRect) const;

    void setLogicalPositionForCell(RenderTableCell*, unsigned effectiveColumn) const;

    RenderObjectChildList m_children;

    Vector<RowStruct> m_grid;
    Vector<int> m_rowPos;

    // the current insertion position
    unsigned m_cCol;
    unsigned m_cRow;

    int m_outerBorderStart;
    int m_outerBorderEnd;
    int m_outerBorderBefore;
    int m_outerBorderAfter;

    bool m_needsCellRecalc;

    // This HashSet holds the overflowing cells for faster painting.
    // If we have more than gMaxAllowedOverflowingCellRatio * total cells, it will be empty
    // and m_forceSlowPaintPathWithOverflowingCell will be set to save memory.
    HashSet<RenderTableCell*> m_overflowingCells;
    bool m_forceSlowPaintPathWithOverflowingCell;

    bool m_hasMultipleCellLevels;

    // This map holds the collapsed border values for cells with collapsed borders.
    // It is held at RenderTableSection level to spare memory consumption by table cells.
    HashMap<pair<const RenderTableCell*, int>, CollapsedBorderValue > m_cellsCollapsedBorders;
};

inline RenderTableSection* toRenderTableSection(RenderObject* object)
{
    ASSERT(!object || object->isTableSection());
    return static_cast<RenderTableSection*>(object);
}

inline const RenderTableSection* toRenderTableSection(const RenderObject* object)
{
    ASSERT(!object || object->isTableSection());
    return static_cast<const RenderTableSection*>(object);
}

// This will catch anyone doing an unnecessary cast.
void toRenderTableSection(const RenderTableSection*);

} // namespace WebCore

#endif // RenderTableSection_h