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, 2007, 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 RenderTableCell_h
26 #define RenderTableCell_h
27
28 #include "core/rendering/RenderBlockFlow.h"
29 #include "core/rendering/RenderTableRow.h"
30 #include "core/rendering/RenderTableSection.h"
31 #include "platform/LengthFunctions.h"
32
33 namespace WebCore {
34
35 static const unsigned unsetColumnIndex = 0x1FFFFFFF;
36 static const unsigned maxColumnIndex = 0x1FFFFFFE; // 536,870,910
37
38 enum IncludeBorderColorOrNot { DoNotIncludeBorderColor, IncludeBorderColor };
39
40 class SubtreeLayoutScope;
41
42 class RenderTableCell FINAL : public RenderBlockFlow {
43 public:
44 explicit RenderTableCell(Element*);
45
colSpan()46 unsigned colSpan() const
47 {
48 if (!m_hasColSpan)
49 return 1;
50 return parseColSpanFromDOM();
51 }
rowSpan()52 unsigned rowSpan() const
53 {
54 if (!m_hasRowSpan)
55 return 1;
56 return parseRowSpanFromDOM();
57 }
58
59 // Called from HTMLTableCellElement.
60 void colSpanOrRowSpanChanged();
61
setCol(unsigned column)62 void setCol(unsigned column)
63 {
64 if (UNLIKELY(column > maxColumnIndex))
65 CRASH();
66
67 m_column = column;
68 }
69
col()70 unsigned col() const
71 {
72 ASSERT(m_column != unsetColumnIndex);
73 return m_column;
74 }
75
row()76 RenderTableRow* row() const { return toRenderTableRow(parent()); }
section()77 RenderTableSection* section() const { return toRenderTableSection(parent()->parent()); }
table()78 RenderTable* table() const { return toRenderTable(parent()->parent()->parent()); }
79
80 RenderTableCell* previousCell() const;
81 RenderTableCell* nextCell() const;
82
rowIndex()83 unsigned rowIndex() const
84 {
85 // This function shouldn't be called on a detached cell.
86 ASSERT(row());
87 return row()->rowIndex();
88 }
89
styleOrColLogicalWidth()90 Length styleOrColLogicalWidth() const
91 {
92 Length styleWidth = style()->logicalWidth();
93 if (!styleWidth.isAuto())
94 return styleWidth;
95 if (RenderTableCol* firstColumn = table()->colElement(col()))
96 return logicalWidthFromColumns(firstColumn, styleWidth);
97 return styleWidth;
98 }
99
logicalHeightForRowSizing()100 int logicalHeightForRowSizing() const
101 {
102 // FIXME: This function does too much work, and is very hot during table layout!
103 int adjustedLogicalHeight = pixelSnappedLogicalHeight() - (intrinsicPaddingBefore() + intrinsicPaddingAfter());
104 int styleLogicalHeight = valueForLength(style()->logicalHeight(), 0);
105 // In strict mode, box-sizing: content-box do the right thing and actually add in the border and padding.
106 // Call computedCSSPadding* directly to avoid including implicitPadding.
107 if (!document().inQuirksMode() && style()->boxSizing() != BORDER_BOX)
108 styleLogicalHeight += (computedCSSPaddingBefore() + computedCSSPaddingAfter()).floor() + borderBefore() + borderAfter();
109 return max(styleLogicalHeight, adjustedLogicalHeight);
110 }
111
112
113 void setCellLogicalWidth(int constrainedLogicalWidth, SubtreeLayoutScope&);
114
115 virtual int borderLeft() const OVERRIDE;
116 virtual int borderRight() const OVERRIDE;
117 virtual int borderTop() const OVERRIDE;
118 virtual int borderBottom() const OVERRIDE;
119 virtual int borderStart() const OVERRIDE;
120 virtual int borderEnd() const OVERRIDE;
121 virtual int borderBefore() const OVERRIDE;
122 virtual int borderAfter() const OVERRIDE;
123
124 void collectBorderValues(RenderTable::CollapsedBorderValues&) const;
125 static void sortBorderValues(RenderTable::CollapsedBorderValues&);
126
127 virtual void layout() OVERRIDE;
128
129 virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE;
130
131 void paintCollapsedBorders(PaintInfo&, const LayoutPoint&);
132 void paintBackgroundsBehindCell(PaintInfo&, const LayoutPoint&, RenderObject* backgroundObject);
133
134 LayoutUnit cellBaselinePosition() const;
isBaselineAligned()135 bool isBaselineAligned() const
136 {
137 EVerticalAlign va = style()->verticalAlign();
138 return va == BASELINE || va == TEXT_BOTTOM || va == TEXT_TOP || va == SUPER || va == SUB || va == LENGTH;
139 }
140
141 void computeIntrinsicPadding(int rowHeight, SubtreeLayoutScope&);
clearIntrinsicPadding()142 void clearIntrinsicPadding() { setIntrinsicPadding(0, 0); }
143
intrinsicPaddingBefore()144 int intrinsicPaddingBefore() const { return m_intrinsicPaddingBefore; }
intrinsicPaddingAfter()145 int intrinsicPaddingAfter() const { return m_intrinsicPaddingAfter; }
146
147 virtual LayoutUnit paddingTop() const OVERRIDE;
148 virtual LayoutUnit paddingBottom() const OVERRIDE;
149 virtual LayoutUnit paddingLeft() const OVERRIDE;
150 virtual LayoutUnit paddingRight() const OVERRIDE;
151
152 // FIXME: For now we just assume the cell has the same block flow direction as the table. It's likely we'll
153 // create an extra anonymous RenderBlock to handle mixing directionality anyway, in which case we can lock
154 // the block flow directionality of the cells to the table's directionality.
155 virtual LayoutUnit paddingBefore() const OVERRIDE;
156 virtual LayoutUnit paddingAfter() const OVERRIDE;
157
158 void setOverrideLogicalContentHeightFromRowHeight(LayoutUnit);
159
160 virtual void scrollbarsChanged(bool horizontalScrollbarChanged, bool verticalScrollbarChanged) OVERRIDE;
161
cellWidthChanged()162 bool cellWidthChanged() const { return m_cellWidthChanged; }
163 void setCellWidthChanged(bool b = true) { m_cellWidthChanged = b; }
164
165 static RenderTableCell* createAnonymous(Document*);
166 static RenderTableCell* createAnonymousWithParentRenderer(const RenderObject*);
createAnonymousBoxWithSameTypeAs(const RenderObject * parent)167 virtual RenderBox* createAnonymousBoxWithSameTypeAs(const RenderObject* parent) const OVERRIDE
168 {
169 return createAnonymousWithParentRenderer(parent);
170 }
171
172 // This function is used to unify which table part's style we use for computing direction and
173 // writing mode. Writing modes are not allowed on row group and row but direction is.
174 // This means we can safely use the same style in all cases to simplify our code.
175 // FIXME: Eventually this function should replaced by style() once we support direction
176 // on all table parts and writing-mode on cells.
styleForCellFlow()177 const RenderStyle* styleForCellFlow() const
178 {
179 return row()->style();
180 }
181
borderAdjoiningTableStart()182 const BorderValue& borderAdjoiningTableStart() const
183 {
184 ASSERT(isFirstOrLastCellInRow());
185 if (section()->hasSameDirectionAs(table()))
186 return style()->borderStart();
187
188 return style()->borderEnd();
189 }
190
borderAdjoiningTableEnd()191 const BorderValue& borderAdjoiningTableEnd() const
192 {
193 ASSERT(isFirstOrLastCellInRow());
194 if (section()->hasSameDirectionAs(table()))
195 return style()->borderEnd();
196
197 return style()->borderStart();
198 }
199
borderAdjoiningCellBefore(const RenderTableCell * cell)200 const BorderValue& borderAdjoiningCellBefore(const RenderTableCell* cell)
201 {
202 ASSERT_UNUSED(cell, table()->cellAfter(cell) == this);
203 // FIXME: https://webkit.org/b/79272 - Add support for mixed directionality at the cell level.
204 return style()->borderStart();
205 }
206
borderAdjoiningCellAfter(const RenderTableCell * cell)207 const BorderValue& borderAdjoiningCellAfter(const RenderTableCell* cell)
208 {
209 ASSERT_UNUSED(cell, table()->cellBefore(cell) == this);
210 // FIXME: https://webkit.org/b/79272 - Add support for mixed directionality at the cell level.
211 return style()->borderEnd();
212 }
213
214 #ifndef NDEBUG
isFirstOrLastCellInRow()215 bool isFirstOrLastCellInRow() const
216 {
217 return !table()->cellAfter(this) || !table()->cellBefore(this);
218 }
219 #endif
220 protected:
221 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
222 virtual void computePreferredLogicalWidths() OVERRIDE;
223
224 virtual void addLayerHitTestRects(LayerHitTestRects&, const RenderLayer* currentCompositedLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const OVERRIDE;
225
226 private:
renderName()227 virtual const char* renderName() const OVERRIDE { return (isAnonymous() || isPseudoElement()) ? "RenderTableCell (anonymous)" : "RenderTableCell"; }
228
isTableCell()229 virtual bool isTableCell() const OVERRIDE { return true; }
230
231 virtual void willBeRemovedFromTree() OVERRIDE;
232
233 virtual void updateLogicalWidth() OVERRIDE;
234
235 virtual void paintBoxDecorations(PaintInfo&, const LayoutPoint&) OVERRIDE;
236 virtual void paintMask(PaintInfo&, const LayoutPoint&) OVERRIDE;
237
238 virtual bool boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance, InlineFlowBox*) const OVERRIDE;
239
240 virtual LayoutSize offsetFromContainer(const RenderObject*, const LayoutPoint&, bool* offsetDependsOnPoint = 0) const OVERRIDE;
241 virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer) const OVERRIDE;
242 virtual void mapRectToPaintInvalidationBacking(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect&, bool fixed = false) const OVERRIDE;
243
244 int borderHalfLeft(bool outer) const;
245 int borderHalfRight(bool outer) const;
246 int borderHalfTop(bool outer) const;
247 int borderHalfBottom(bool outer) const;
248
249 int borderHalfStart(bool outer) const;
250 int borderHalfEnd(bool outer) const;
251 int borderHalfBefore(bool outer) const;
252 int borderHalfAfter(bool outer) const;
253
setIntrinsicPaddingBefore(int p)254 void setIntrinsicPaddingBefore(int p) { m_intrinsicPaddingBefore = p; }
setIntrinsicPaddingAfter(int p)255 void setIntrinsicPaddingAfter(int p) { m_intrinsicPaddingAfter = p; }
setIntrinsicPadding(int before,int after)256 void setIntrinsicPadding(int before, int after) { setIntrinsicPaddingBefore(before); setIntrinsicPaddingAfter(after); }
257
258 bool hasStartBorderAdjoiningTable() const;
259 bool hasEndBorderAdjoiningTable() const;
260
261 CollapsedBorderValue collapsedStartBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
262 CollapsedBorderValue collapsedEndBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
263 CollapsedBorderValue collapsedBeforeBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
264 CollapsedBorderValue collapsedAfterBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
265
266 CollapsedBorderValue cachedCollapsedLeftBorder(const RenderStyle*) const;
267 CollapsedBorderValue cachedCollapsedRightBorder(const RenderStyle*) const;
268 CollapsedBorderValue cachedCollapsedTopBorder(const RenderStyle*) const;
269 CollapsedBorderValue cachedCollapsedBottomBorder(const RenderStyle*) const;
270
271 CollapsedBorderValue computeCollapsedStartBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
272 CollapsedBorderValue computeCollapsedEndBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
273 CollapsedBorderValue computeCollapsedBeforeBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
274 CollapsedBorderValue computeCollapsedAfterBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
275
276 Length logicalWidthFromColumns(RenderTableCol* firstColForThisCell, Length widthFromStyle) const;
277
278 void updateColAndRowSpanFlags();
279
280 unsigned parseRowSpanFromDOM() const;
281 unsigned parseColSpanFromDOM() const;
282
283 void nextSibling() const WTF_DELETED_FUNCTION;
284 void previousSibling() const WTF_DELETED_FUNCTION;
285
286 // Note MSVC will only pack members if they have identical types, hence we use unsigned instead of bool here.
287 unsigned m_column : 29;
288 unsigned m_cellWidthChanged : 1;
289 unsigned m_hasColSpan: 1;
290 unsigned m_hasRowSpan: 1;
291 int m_intrinsicPaddingBefore;
292 int m_intrinsicPaddingAfter;
293 };
294
295 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableCell, isTableCell());
296
previousCell()297 inline RenderTableCell* RenderTableCell::previousCell() const
298 {
299 return toRenderTableCell(RenderObject::previousSibling());
300 }
301
nextCell()302 inline RenderTableCell* RenderTableCell::nextCell() const
303 {
304 return toRenderTableCell(RenderObject::nextSibling());
305 }
306
firstCell()307 inline RenderTableCell* RenderTableRow::firstCell() const
308 {
309 ASSERT(children() == virtualChildren());
310 return toRenderTableCell(children()->firstChild());
311 }
312
lastCell()313 inline RenderTableCell* RenderTableRow::lastCell() const
314 {
315 ASSERT(children() == virtualChildren());
316 return toRenderTableCell(children()->lastChild());
317 }
318
319 } // namespace WebCore
320
321 #endif // RenderTableCell_h
322