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 "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: 43 CellSpan(unsigned start, unsigned end) 44 : m_start(start) 45 , m_end(end) 46 { 47 } 48 49 unsigned start() const { return m_start; } 50 unsigned end() const { return m_end; } 51 52 unsigned& start() { return m_start; } 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 RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); } 69 RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); } 70 71 const RenderObjectChildList* children() const { return &m_children; } 72 RenderObjectChildList* children() { return &m_children; } 73 74 virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0); 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 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 92 CellStruct() 93 : inColSpan(false) 94 { 95 } 96 97 RenderTableCell* primaryCell() 98 { 99 return hasCells() ? cells[cells.size() - 1] : 0; 100 } 101 102 const RenderTableCell* primaryCell() const 103 { 104 return hasCells() ? cells[cells.size() - 1] : 0; 105 } 106 107 bool hasCells() const { return cells.size() > 0; } 108 }; 109 110 typedef Vector<CellStruct> Row; 111 112 struct RowStruct { 113 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: 129 SpanningRowsHeight() 130 : totalRowsHeight(0) 131 , spanningCellHeightIgnoringBorderSpacing(0) 132 { 133 } 134 135 Vector<int> rowHeight; 136 int totalRowsHeight; 137 int spanningCellHeightIgnoringBorderSpacing; 138 }; 139 140 const BorderValue& borderAdjoiningTableStart() const 141 { 142 if (hasSameDirectionAs(table())) 143 return style()->borderStart(); 144 145 return style()->borderEnd(); 146 } 147 148 const BorderValue& borderAdjoiningTableEnd() const 149 { 150 if (hasSameDirectionAs(table())) 151 return style()->borderEnd(); 152 153 return style()->borderStart(); 154 } 155 156 const BorderValue& borderAdjoiningStartCell(const RenderTableCell*) const; 157 const BorderValue& borderAdjoiningEndCell(const RenderTableCell*) const; 158 159 const RenderTableCell* firstRowCellAdjoiningTableStart() const; 160 const RenderTableCell* firstRowCellAdjoiningTableEnd() const; 161 162 CellStruct& cellAt(unsigned row, unsigned col) { return m_grid[row].row[col]; } 163 const CellStruct& cellAt(unsigned row, unsigned col) const { return m_grid[row].row[col]; } 164 RenderTableCell* primaryCellAt(unsigned row, unsigned col) 165 { 166 CellStruct& c = m_grid[row].row[col]; 167 return c.primaryCell(); 168 } 169 170 RenderTableRow* rowRendererAt(unsigned row) const { return m_grid[row].rowRenderer; } 171 172 void appendColumn(unsigned pos); 173 void splitColumn(unsigned pos, unsigned first); 174 175 int calcOuterBorderBefore() const; 176 int calcOuterBorderAfter() const; 177 int calcOuterBorderStart() const; 178 int calcOuterBorderEnd() const; 179 void recalcOuterBorder(); 180 181 int outerBorderBefore() const { return m_outerBorderBefore; } 182 int outerBorderAfter() const { return m_outerBorderAfter; } 183 int outerBorderStart() const { return m_outerBorderStart; } 184 int outerBorderEnd() const { return m_outerBorderEnd; } 185 186 unsigned numRows() const { return m_grid.size(); } 187 unsigned numColumns() const; 188 void recalcCells(); 189 void recalcCellsIfNeeded() 190 { 191 if (m_needsCellRecalc) 192 recalcCells(); 193 } 194 195 bool needsCellRecalc() const { return m_needsCellRecalc; } 196 void setNeedsCellRecalc(); 197 198 LayoutUnit rowBaseline(unsigned row) { return m_grid[row].baseline; } 199 200 void rowLogicalHeightChanged(unsigned rowIndex); 201 202 void removeCachedCollapsedBorders(const RenderTableCell*); 203 void setCachedCollapsedBorder(const RenderTableCell*, CollapsedBorderSide, CollapsedBorderValue); 204 CollapsedBorderValue& cachedCollapsedBorder(const RenderTableCell*, CollapsedBorderSide); 205 206 // distributeExtraLogicalHeightToRows methods return the *consumed* extra logical height. 207 // FIXME: We may want to introduce a structure holding the in-flux layout information. 208 int distributeExtraLogicalHeightToRows(int extraLogicalHeight); 209 210 static RenderTableSection* createAnonymousWithParentRenderer(const RenderObject*); 211 virtual RenderBox* createAnonymousBoxWithSameTypeAs(const RenderObject* parent) const OVERRIDE 212 { 213 return createAnonymousWithParentRenderer(parent); 214 } 215 216 virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE; 217 218 protected: 219 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); 220 221 private: 222 virtual RenderObjectChildList* virtualChildren() { return children(); } 223 virtual const RenderObjectChildList* virtualChildren() const { return children(); } 224 225 virtual const char* renderName() const { return (isAnonymous() || isPseudoElement()) ? "RenderTableSection (anonymous)" : "RenderTableSection"; } 226 227 virtual bool isTableSection() const { return true; } 228 229 virtual void willBeRemovedFromTree() OVERRIDE; 230 231 virtual void layout(); 232 233 virtual void paintCell(RenderTableCell*, PaintInfo&, const LayoutPoint&); 234 virtual void paintObject(PaintInfo&, const LayoutPoint&); 235 236 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0); 237 238 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE; 239 240 int borderSpacingForRow(unsigned row) const { return m_grid[row].rowRenderer ? table()->vBorderSpacing() : 0; } 241 242 void ensureRows(unsigned); 243 244 void populateSpanningRowsHeightFromCell(RenderTableCell*, struct SpanningRowsHeight&); 245 void distributeExtraRowSpanHeightToPercentRows(RenderTableCell*, int, int&, Vector<int>&); 246 void distributeExtraRowSpanHeightToAutoRows(RenderTableCell*, int, int&, Vector<int>&); 247 void distributeExtraRowSpanHeightToRemainingRows(RenderTableCell*, int, int&, Vector<int>&); 248 void distributeRowSpanHeightToRows(SpanningRenderTableCells& rowSpanCells); 249 250 void distributeExtraLogicalHeightToPercentRows(int& extraLogicalHeight, int totalPercent); 251 void distributeExtraLogicalHeightToAutoRows(int& extraLogicalHeight, unsigned autoRowsCount); 252 void distributeRemainingExtraLogicalHeight(int& extraLogicalHeight); 253 254 void updateBaselineForCell(RenderTableCell*, unsigned row, LayoutUnit& baselineDescent); 255 256 bool hasOverflowingCell() const { return m_overflowingCells.size() || m_forceSlowPaintPathWithOverflowingCell; } 257 void computeOverflowFromCells(unsigned totalRows, unsigned nEffCols); 258 259 CellSpan fullTableRowSpan() const { return CellSpan(0, m_grid.size()); } 260 CellSpan fullTableColumnSpan() const { return CellSpan(0, table()->columns().size()); } 261 262 // Flip the rect so it aligns with the coordinates used by the rowPos and columnPos vectors. 263 LayoutRect logicalRectForWritingModeAndDirection(const LayoutRect&) const; 264 265 CellSpan dirtiedRows(const LayoutRect& repaintRect) const; 266 CellSpan dirtiedColumns(const LayoutRect& repaintRect) const; 267 268 // These two functions take a rectangle as input that has been flipped by logicalRectForWritingModeAndDirection. 269 // The returned span of rows or columns is end-exclusive, and empty if start==end. 270 CellSpan spannedRows(const LayoutRect& flippedRect) const; 271 CellSpan spannedColumns(const LayoutRect& flippedRect) const; 272 273 void setLogicalPositionForCell(RenderTableCell*, unsigned effectiveColumn) const; 274 275 RenderObjectChildList m_children; 276 277 Vector<RowStruct> m_grid; 278 Vector<int> m_rowPos; 279 280 // the current insertion position 281 unsigned m_cCol; 282 unsigned m_cRow; 283 284 int m_outerBorderStart; 285 int m_outerBorderEnd; 286 int m_outerBorderBefore; 287 int m_outerBorderAfter; 288 289 bool m_needsCellRecalc; 290 291 // This HashSet holds the overflowing cells for faster painting. 292 // If we have more than gMaxAllowedOverflowingCellRatio * total cells, it will be empty 293 // and m_forceSlowPaintPathWithOverflowingCell will be set to save memory. 294 HashSet<RenderTableCell*> m_overflowingCells; 295 bool m_forceSlowPaintPathWithOverflowingCell; 296 297 bool m_hasMultipleCellLevels; 298 299 // This map holds the collapsed border values for cells with collapsed borders. 300 // It is held at RenderTableSection level to spare memory consumption by table cells. 301 HashMap<pair<const RenderTableCell*, int>, CollapsedBorderValue > m_cellsCollapsedBorders; 302 }; 303 304 inline RenderTableSection* toRenderTableSection(RenderObject* object) 305 { 306 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isTableSection()); 307 return static_cast<RenderTableSection*>(object); 308 } 309 310 inline const RenderTableSection* toRenderTableSection(const RenderObject* object) 311 { 312 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isTableSection()); 313 return static_cast<const RenderTableSection*>(object); 314 } 315 316 // This will catch anyone doing an unnecessary cast. 317 void toRenderTableSection(const RenderTableSection*); 318 319 } // namespace WebCore 320 321 #endif // RenderTableSection_h 322