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, 2013 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 "core/rendering/RenderTable.h" 29 #include "wtf/Vector.h" 30 31 namespace WebCore { 32 33 enum CollapsedBorderSide { 34 CBSBefore, 35 CBSAfter, 36 CBSStart, 37 CBSEnd 38 }; 39 40 // Helper class for paintObject. 41 class CellSpan { 42 public: CellSpan(unsigned start,unsigned end)43 CellSpan(unsigned start, unsigned end) 44 : m_start(start) 45 , m_end(end) 46 { 47 } 48 start()49 unsigned start() const { return m_start; } end()50 unsigned end() const { return m_end; } 51 start()52 unsigned& start() { return m_start; } end()53 unsigned& end() { return m_end; } 54 55 private: 56 unsigned m_start; 57 unsigned m_end; 58 }; 59 60 class RenderTableCell; 61 class RenderTableRow; 62 63 class RenderTableSection FINAL : public RenderBox { 64 public: 65 RenderTableSection(Element*); 66 virtual ~RenderTableSection(); 67 68 RenderTableRow* firstRow() const; 69 RenderTableRow* lastRow() const; 70 children()71 const RenderObjectChildList* children() const { return &m_children; } children()72 RenderObjectChildList* children() { return &m_children; } 73 74 virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) OVERRIDE; 75 76 virtual int firstLineBoxBaseline() const OVERRIDE; 77 78 void addCell(RenderTableCell*, RenderTableRow* row); 79 80 int calcRowLogicalHeight(); 81 void layoutRows(); 82 void computeOverflowFromCells(); 83 table()84 RenderTable* table() const { return toRenderTable(parent()); } 85 86 typedef Vector<RenderTableCell*, 2> SpanningRenderTableCells; 87 88 struct CellStruct { 89 Vector<RenderTableCell*, 1> cells; 90 bool inColSpan; // true for columns after the first in a colspan 91 CellStructCellStruct92 CellStruct() 93 : inColSpan(false) 94 { 95 } 96 primaryCellCellStruct97 RenderTableCell* primaryCell() 98 { 99 return hasCells() ? cells[cells.size() - 1] : 0; 100 } 101 primaryCellCellStruct102 const RenderTableCell* primaryCell() const 103 { 104 return hasCells() ? cells[cells.size() - 1] : 0; 105 } 106 hasCellsCellStruct107 bool hasCells() const { return cells.size() > 0; } 108 }; 109 110 typedef Vector<CellStruct> Row; 111 112 struct RowStruct { RowStructRowStruct113 RowStruct() 114 : rowRenderer(0) 115 , baseline() 116 { 117 } 118 119 Row row; 120 RenderTableRow* rowRenderer; 121 LayoutUnit baseline; 122 Length logicalHeight; 123 }; 124 125 struct SpanningRowsHeight { 126 WTF_MAKE_NONCOPYABLE(SpanningRowsHeight); 127 128 public: SpanningRowsHeightSpanningRowsHeight129 SpanningRowsHeight() 130 : totalRowsHeight(0) 131 , spanningCellHeightIgnoringBorderSpacing(0) 132 , isAnyRowWithOnlySpanningCells(false) 133 { 134 } 135 136 Vector<int> rowHeight; 137 int totalRowsHeight; 138 int spanningCellHeightIgnoringBorderSpacing; 139 bool isAnyRowWithOnlySpanningCells; 140 }; 141 borderAdjoiningTableStart()142 const BorderValue& borderAdjoiningTableStart() const 143 { 144 if (hasSameDirectionAs(table())) 145 return style()->borderStart(); 146 147 return style()->borderEnd(); 148 } 149 borderAdjoiningTableEnd()150 const BorderValue& borderAdjoiningTableEnd() const 151 { 152 if (hasSameDirectionAs(table())) 153 return style()->borderEnd(); 154 155 return style()->borderStart(); 156 } 157 158 const BorderValue& borderAdjoiningStartCell(const RenderTableCell*) const; 159 const BorderValue& borderAdjoiningEndCell(const RenderTableCell*) const; 160 161 const RenderTableCell* firstRowCellAdjoiningTableStart() const; 162 const RenderTableCell* firstRowCellAdjoiningTableEnd() const; 163 cellAt(unsigned row,unsigned col)164 CellStruct& cellAt(unsigned row, unsigned col) { return m_grid[row].row[col]; } cellAt(unsigned row,unsigned col)165 const CellStruct& cellAt(unsigned row, unsigned col) const { return m_grid[row].row[col]; } primaryCellAt(unsigned row,unsigned col)166 RenderTableCell* primaryCellAt(unsigned row, unsigned col) 167 { 168 CellStruct& c = m_grid[row].row[col]; 169 return c.primaryCell(); 170 } 171 rowRendererAt(unsigned row)172 RenderTableRow* rowRendererAt(unsigned row) const { return m_grid[row].rowRenderer; } 173 174 void appendColumn(unsigned pos); 175 void splitColumn(unsigned pos, unsigned first); 176 177 enum BlockBorderSide { BorderBefore, BorderAfter }; 178 int calcBlockDirectionOuterBorder(BlockBorderSide) const; 179 enum InlineBorderSide { BorderStart, BorderEnd }; 180 int calcInlineDirectionOuterBorder(InlineBorderSide) const; 181 void recalcOuterBorder(); 182 outerBorderBefore()183 int outerBorderBefore() const { return m_outerBorderBefore; } outerBorderAfter()184 int outerBorderAfter() const { return m_outerBorderAfter; } outerBorderStart()185 int outerBorderStart() const { return m_outerBorderStart; } outerBorderEnd()186 int outerBorderEnd() const { return m_outerBorderEnd; } 187 numRows()188 unsigned numRows() const { return m_grid.size(); } 189 unsigned numColumns() const; 190 void recalcCells(); recalcCellsIfNeeded()191 void recalcCellsIfNeeded() 192 { 193 if (m_needsCellRecalc) 194 recalcCells(); 195 } 196 needsCellRecalc()197 bool needsCellRecalc() const { return m_needsCellRecalc; } 198 void setNeedsCellRecalc(); 199 rowBaseline(unsigned row)200 LayoutUnit rowBaseline(unsigned row) { return m_grid[row].baseline; } 201 202 void rowLogicalHeightChanged(unsigned rowIndex); 203 204 void removeCachedCollapsedBorders(const RenderTableCell*); 205 void setCachedCollapsedBorder(const RenderTableCell*, CollapsedBorderSide, CollapsedBorderValue); 206 CollapsedBorderValue& cachedCollapsedBorder(const RenderTableCell*, CollapsedBorderSide); 207 208 // distributeExtraLogicalHeightToRows methods return the *consumed* extra logical height. 209 // FIXME: We may want to introduce a structure holding the in-flux layout information. 210 int distributeExtraLogicalHeightToRows(int extraLogicalHeight); 211 212 static RenderTableSection* createAnonymousWithParentRenderer(const RenderObject*); createAnonymousBoxWithSameTypeAs(const RenderObject * parent)213 virtual RenderBox* createAnonymousBoxWithSameTypeAs(const RenderObject* parent) const OVERRIDE 214 { 215 return createAnonymousWithParentRenderer(parent); 216 } 217 218 virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE; 219 220 protected: 221 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE; 222 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE; 223 224 private: virtualChildren()225 virtual RenderObjectChildList* virtualChildren() OVERRIDE { return children(); } virtualChildren()226 virtual const RenderObjectChildList* virtualChildren() const OVERRIDE { return children(); } 227 renderName()228 virtual const char* renderName() const OVERRIDE { return (isAnonymous() || isPseudoElement()) ? "RenderTableSection (anonymous)" : "RenderTableSection"; } 229 isTableSection()230 virtual bool isTableSection() const OVERRIDE { return true; } 231 232 virtual void willBeRemovedFromTree() OVERRIDE; 233 234 virtual void layout() OVERRIDE; 235 236 void paintCell(RenderTableCell*, PaintInfo&, const LayoutPoint&); 237 virtual void paintObject(PaintInfo&, const LayoutPoint&) OVERRIDE; 238 239 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) OVERRIDE; 240 borderSpacingForRow(unsigned row)241 int borderSpacingForRow(unsigned row) const { return m_grid[row].rowRenderer ? table()->vBorderSpacing() : 0; } 242 243 void ensureRows(unsigned); 244 245 bool rowHasOnlySpanningCells(unsigned); 246 unsigned calcRowHeightHavingOnlySpanningCells(unsigned); 247 void updateRowsHeightHavingOnlySpanningCells(RenderTableCell*, struct SpanningRowsHeight&); 248 bool isHeightNeededForRowHavingOnlySpanningCells(unsigned); 249 250 void populateSpanningRowsHeightFromCell(RenderTableCell*, struct SpanningRowsHeight&); 251 void distributeExtraRowSpanHeightToPercentRows(RenderTableCell*, int, int&, Vector<int>&); 252 void distributeExtraRowSpanHeightToAutoRows(RenderTableCell*, int, int&, Vector<int>&); 253 void distributeExtraRowSpanHeightToRemainingRows(RenderTableCell*, int, int&, Vector<int>&); 254 void distributeRowSpanHeightToRows(SpanningRenderTableCells& rowSpanCells); 255 256 void distributeExtraLogicalHeightToPercentRows(int& extraLogicalHeight, int totalPercent); 257 void distributeExtraLogicalHeightToAutoRows(int& extraLogicalHeight, unsigned autoRowsCount); 258 void distributeRemainingExtraLogicalHeight(int& extraLogicalHeight); 259 260 void updateBaselineForCell(RenderTableCell*, unsigned row, LayoutUnit& baselineDescent); 261 hasOverflowingCell()262 bool hasOverflowingCell() const { return m_overflowingCells.size() || m_forceSlowPaintPathWithOverflowingCell; } 263 void computeOverflowFromCells(unsigned totalRows, unsigned nEffCols); 264 fullTableRowSpan()265 CellSpan fullTableRowSpan() const { return CellSpan(0, m_grid.size()); } fullTableColumnSpan()266 CellSpan fullTableColumnSpan() const { return CellSpan(0, table()->columns().size()); } 267 268 // Flip the rect so it aligns with the coordinates used by the rowPos and columnPos vectors. 269 LayoutRect logicalRectForWritingModeAndDirection(const LayoutRect&) const; 270 271 CellSpan dirtiedRows(const LayoutRect& repaintRect) const; 272 CellSpan dirtiedColumns(const LayoutRect& repaintRect) const; 273 274 // These two functions take a rectangle as input that has been flipped by logicalRectForWritingModeAndDirection. 275 // The returned span of rows or columns is end-exclusive, and empty if start==end. 276 CellSpan spannedRows(const LayoutRect& flippedRect) const; 277 CellSpan spannedColumns(const LayoutRect& flippedRect) const; 278 279 void setLogicalPositionForCell(RenderTableCell*, unsigned effectiveColumn) const; 280 281 RenderObjectChildList m_children; 282 283 Vector<RowStruct> m_grid; 284 Vector<int> m_rowPos; 285 286 // the current insertion position 287 unsigned m_cCol; 288 unsigned m_cRow; 289 290 int m_outerBorderStart; 291 int m_outerBorderEnd; 292 int m_outerBorderBefore; 293 int m_outerBorderAfter; 294 295 bool m_needsCellRecalc; 296 297 // This HashSet holds the overflowing cells for faster painting. 298 // If we have more than gMaxAllowedOverflowingCellRatio * total cells, it will be empty 299 // and m_forceSlowPaintPathWithOverflowingCell will be set to save memory. 300 HashSet<RenderTableCell*> m_overflowingCells; 301 bool m_forceSlowPaintPathWithOverflowingCell; 302 303 bool m_hasMultipleCellLevels; 304 305 // This map holds the collapsed border values for cells with collapsed borders. 306 // It is held at RenderTableSection level to spare memory consumption by table cells. 307 HashMap<pair<const RenderTableCell*, int>, CollapsedBorderValue > m_cellsCollapsedBorders; 308 }; 309 310 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableSection, isTableSection()); 311 312 } // namespace WebCore 313 314 #endif // RenderTableSection_h 315