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* Copyright (C) 1997 Martin Jones (
* (C) 1997 Torben Weis (
* (C) 1998 Waldo Bastian (
* (C) 1999 Lars Knoll (
* (C) 1999 Antti Koivisto (
* 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
* 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 "core/rendering/RenderTable.h"
#include "wtf/Vector.h"
namespace WebCore {
enum CollapsedBorderSide {
// Helper class for paintObject.
class CellSpan {
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; }
unsigned m_start;
unsigned m_end;
class RenderTableCell;
class RenderTableRow;
class RenderTableSection FINAL : public RenderBox {
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();
void computeOverflowFromCells();
RenderTable* table() const { return toRenderTable(parent()); }
typedef Vector<RenderTableCell*, 2> SpanningRenderTableCells;
struct CellStruct {
Vector<RenderTableCell*, 1> cells;
bool inColSpan; // true for columns after the first in a colspan
: 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 {
: rowRenderer(0)
, baseline()
Row row;
RenderTableRow* rowRenderer;
LayoutUnit baseline;
Length logicalHeight;
struct SpanningRowsHeight {
: totalRowsHeight(0)
, spanningCellHeightIgnoringBorderSpacing(0)
, rowWithOnlySpanningCells(false)
Vector<int> rowHeight;
int totalRowsHeight;
int spanningCellHeightIgnoringBorderSpacing;
bool rowWithOnlySpanningCells;
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();
RenderTableRow* rowRendererAt(unsigned row) const { return m_grid[row].rowRenderer; }
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)
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;
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
virtual RenderObjectChildList* virtualChildren() { return children(); }
virtual const RenderObjectChildList* virtualChildren() const { return children(); }
virtual const char* renderName() const { return (isAnonymous() || isPseudoElement()) ? "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;
int borderSpacingForRow(unsigned row) const { return m_grid[row].rowRenderer ? table()->vBorderSpacing() : 0; }
void ensureRows(unsigned);
bool rowHasOnlySpanningCells(unsigned);
unsigned calcRowHeightHavingOnlySpanningCells(unsigned);
void updateRowsHeightHavingOnlySpanningCells(RenderTableCell*, struct SpanningRowsHeight&);
bool isHeightNeededForRowHavingOnlySpanningCells(unsigned);
void populateSpanningRowsHeightFromCell(RenderTableCell*, struct SpanningRowsHeight&);
void distributeExtraRowSpanHeightToPercentRows(RenderTableCell*, int, int&, Vector<int>&);
void distributeExtraRowSpanHeightToAutoRows(RenderTableCell*, int, int&, Vector<int>&);
void distributeExtraRowSpanHeightToRemainingRows(RenderTableCell*, int, int&, Vector<int>&);
void distributeRowSpanHeightToRows(SpanningRenderTableCells& rowSpanCells);
void distributeExtraLogicalHeightToPercentRows(int& extraLogicalHeight, int totalPercent);
void distributeExtraLogicalHeightToAutoRows(int& extraLogicalHeight, unsigned autoRowsCount);
void distributeRemainingExtraLogicalHeight(int& extraLogicalHeight);
void updateBaselineForCell(RenderTableCell*, unsigned row, LayoutUnit& baselineDescent);
bool hasOverflowingCell() const { return m_overflowingCells.size() || m_forceSlowPaintPathWithOverflowingCell; }
void computeOverflowFromCells(unsigned totalRows, unsigned nEffCols);
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;
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableSection, isTableSection());
} // namespace WebCore
#endif // RenderTableSection_h