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Diffstat (limited to 'Source/WebCore/rendering/RenderTableCell.cpp')
| -rw-r--r-- | Source/WebCore/rendering/RenderTableCell.cpp | 1068 |
1 files changed, 1068 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/RenderTableCell.cpp b/Source/WebCore/rendering/RenderTableCell.cpp new file mode 100644 index 0000000..0c2cf2f --- /dev/null +++ b/Source/WebCore/rendering/RenderTableCell.cpp @@ -0,0 +1,1068 @@ +/* + * 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, 2007, 2008, 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. + */ + +#include "config.h" +#include "RenderTableCell.h" + +#include "FloatQuad.h" +#include "GraphicsContext.h" +#include "HTMLNames.h" +#include "HTMLTableCellElement.h" +#include "RenderTableCol.h" +#include "RenderView.h" +#include "TransformState.h" + +#ifdef ANDROID_LAYOUT +#include "Document.h" +#include "Settings.h" +#endif + +using namespace std; + +namespace WebCore { + +using namespace HTMLNames; + +RenderTableCell::RenderTableCell(Node* node) + : RenderBlock(node) + , m_row(-1) + , m_column(-1) + , m_rowSpan(1) + , m_columnSpan(1) + , m_intrinsicPaddingBefore(0) + , m_intrinsicPaddingAfter(0) +{ + updateFromElement(); +} + +void RenderTableCell::destroy() +{ + RenderTableSection* recalcSection = parent() ? section() : 0; + + RenderBlock::destroy(); + + if (recalcSection) + recalcSection->setNeedsCellRecalc(); +} + +void RenderTableCell::updateFromElement() +{ + Node* n = node(); + if (n && (n->hasTagName(tdTag) || n->hasTagName(thTag))) { + HTMLTableCellElement* tc = static_cast<HTMLTableCellElement*>(n); + int oldRSpan = m_rowSpan; + int oldCSpan = m_columnSpan; + + m_columnSpan = tc->colSpan(); + m_rowSpan = tc->rowSpan(); + if ((oldRSpan != m_rowSpan || oldCSpan != m_columnSpan) && style() && parent()) { + setNeedsLayoutAndPrefWidthsRecalc(); + if (section()) + section()->setNeedsCellRecalc(); + } + } +} + +Length RenderTableCell::styleOrColLogicalWidth() const +{ + Length w = style()->logicalWidth(); + if (!w.isAuto()) + return w; + + if (RenderTableCol* tableCol = table()->colElement(col())) { + int colSpanCount = colSpan(); + + Length colWidthSum = Length(0, Fixed); + for (int i = 1; i <= colSpanCount; i++) { + Length colWidth = tableCol->style()->logicalWidth(); + + // Percentage value should be returned only for colSpan == 1. + // Otherwise we return original width for the cell. + if (!colWidth.isFixed()) { + if (colSpanCount > 1) + return w; + return colWidth; + } + + colWidthSum = Length(colWidthSum.value() + colWidth.value(), Fixed); + + tableCol = table()->nextColElement(tableCol); + // If no next <col> tag found for the span we just return what we have for now. + if (!tableCol) + break; + } + + // Column widths specified on <col> apply to the border box of the cell. + // Percentages don't need to be handled since they're always treated this way (even when specified on the cells). + // See Bugzilla bug 8126 for details. + if (colWidthSum.isFixed() && colWidthSum.value() > 0) + colWidthSum = Length(max(0, colWidthSum.value() - borderAndPaddingLogicalWidth()), Fixed); + return colWidthSum; + } + + return w; +} + +void RenderTableCell::computePreferredLogicalWidths() +{ + // The child cells rely on the grids up in the sections to do their computePreferredLogicalWidths work. Normally the sections are set up early, as table + // cells are added, but relayout can cause the cells to be freed, leaving stale pointers in the sections' + // grids. We must refresh those grids before the child cells try to use them. + table()->recalcSectionsIfNeeded(); + + RenderBlock::computePreferredLogicalWidths(); + if (node() && style()->autoWrap()) { + // See if nowrap was set. + Length w = styleOrColLogicalWidth(); + String nowrap = static_cast<Element*>(node())->getAttribute(nowrapAttr); + if (!nowrap.isNull() && w.isFixed()) + // Nowrap is set, but we didn't actually use it because of the + // fixed width set on the cell. Even so, it is a WinIE/Moz trait + // to make the minwidth of the cell into the fixed width. They do this + // even in strict mode, so do not make this a quirk. Affected the top + // of hiptop.com. + m_minPreferredLogicalWidth = max(w.value(), m_minPreferredLogicalWidth); + } +} + +void RenderTableCell::computeLogicalWidth() +{ +#ifdef ANDROID_LAYOUT + if (view()->frameView()) + setVisibleWidth(view()->frameView()->textWrapWidth()); +#endif +} + +void RenderTableCell::updateLogicalWidth(int w) +{ + if (w == logicalWidth()) + return; + + setLogicalWidth(w); + setCellWidthChanged(true); +} + +void RenderTableCell::layout() +{ + layoutBlock(cellWidthChanged()); + setCellWidthChanged(false); +} + +int RenderTableCell::paddingTop(bool includeIntrinsicPadding) const +{ + int result = RenderBlock::paddingTop(); + if (!includeIntrinsicPadding || !style()->isHorizontalWritingMode()) + return result; + return result + (style()->writingMode() == TopToBottomWritingMode ? intrinsicPaddingBefore() : intrinsicPaddingAfter()); +} + +int RenderTableCell::paddingBottom(bool includeIntrinsicPadding) const +{ + int result = RenderBlock::paddingBottom(); + if (!includeIntrinsicPadding || !style()->isHorizontalWritingMode()) + return result; + return result + (style()->writingMode() == TopToBottomWritingMode ? intrinsicPaddingAfter() : intrinsicPaddingBefore()); +} + +int RenderTableCell::paddingLeft(bool includeIntrinsicPadding) const +{ + int result = RenderBlock::paddingLeft(); + if (!includeIntrinsicPadding || style()->isHorizontalWritingMode()) + return result; + return result + (style()->writingMode() == LeftToRightWritingMode ? intrinsicPaddingBefore() : intrinsicPaddingAfter()); + +} + +int RenderTableCell::paddingRight(bool includeIntrinsicPadding) const +{ + int result = RenderBlock::paddingRight(); + if (!includeIntrinsicPadding || style()->isHorizontalWritingMode()) + return result; + return result + (style()->writingMode() == LeftToRightWritingMode ? intrinsicPaddingAfter() : intrinsicPaddingBefore()); +} + +int RenderTableCell::paddingBefore(bool includeIntrinsicPadding) const +{ + int result = RenderBlock::paddingBefore(); + if (!includeIntrinsicPadding) + return result; + return result + intrinsicPaddingBefore(); +} + +int RenderTableCell::paddingAfter(bool includeIntrinsicPadding) const +{ + int result = RenderBlock::paddingAfter(); + if (!includeIntrinsicPadding) + return result; + return result + intrinsicPaddingAfter(); +} + +void RenderTableCell::setOverrideSize(int size) +{ + clearIntrinsicPadding(); + RenderBlock::setOverrideSize(size); +} + +IntSize RenderTableCell::offsetFromContainer(RenderObject* o, const IntPoint& point) const +{ + ASSERT(o == container()); + + IntSize offset = RenderBlock::offsetFromContainer(o, point); + if (parent()) + offset.expand(-parentBox()->x(), -parentBox()->y()); + + return offset; +} + +IntRect RenderTableCell::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer) +{ + // If the table grid is dirty, we cannot get reliable information about adjoining cells, + // so we ignore outside borders. This should not be a problem because it means that + // the table is going to recalculate the grid, relayout and repaint its current rect, which + // includes any outside borders of this cell. + if (!table()->collapseBorders() || table()->needsSectionRecalc()) + return RenderBlock::clippedOverflowRectForRepaint(repaintContainer); + + bool rtl = !table()->style()->isLeftToRightDirection(); + int outlineSize = style()->outlineSize(); + int left = max(borderHalfLeft(true), outlineSize); + int right = max(borderHalfRight(true), outlineSize); + int top = max(borderHalfTop(true), outlineSize); + int bottom = max(borderHalfBottom(true), outlineSize); + if ((left && !rtl) || (right && rtl)) { + if (RenderTableCell* before = table()->cellBefore(this)) { + top = max(top, before->borderHalfTop(true)); + bottom = max(bottom, before->borderHalfBottom(true)); + } + } + if ((left && rtl) || (right && !rtl)) { + if (RenderTableCell* after = table()->cellAfter(this)) { + top = max(top, after->borderHalfTop(true)); + bottom = max(bottom, after->borderHalfBottom(true)); + } + } + if (top) { + if (RenderTableCell* above = table()->cellAbove(this)) { + left = max(left, above->borderHalfLeft(true)); + right = max(right, above->borderHalfRight(true)); + } + } + if (bottom) { + if (RenderTableCell* below = table()->cellBelow(this)) { + left = max(left, below->borderHalfLeft(true)); + right = max(right, below->borderHalfRight(true)); + } + } + left = max(left, -leftVisualOverflow()); + top = max(top, -topVisualOverflow()); + IntRect r(-left, - top, left + max(width() + right, rightVisualOverflow()), top + max(height() + bottom, bottomVisualOverflow())); + + if (RenderView* v = view()) { + // FIXME: layoutDelta needs to be applied in parts before/after transforms and + // repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308 + r.move(v->layoutDelta()); + } + computeRectForRepaint(repaintContainer, r); + return r; +} + +void RenderTableCell::computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect& r, bool fixed) +{ + if (repaintContainer == this) + return; + r.setY(r.y()); + RenderView* v = view(); + if ((!v || !v->layoutStateEnabled() || repaintContainer) && parent()) + r.move(-parentBox()->x(), -parentBox()->y()); // Rows are in the same coordinate space, so don't add their offset in. + RenderBlock::computeRectForRepaint(repaintContainer, r, fixed); +} + +int RenderTableCell::baselinePosition() const +{ + // <http://www.w3.org/TR/2007/CR-CSS21-20070719/tables.html#height-layout>: The baseline of a cell is the baseline of + // the first in-flow line box in the cell, or the first in-flow table-row in the cell, whichever comes first. If there + // is no such line box or table-row, the baseline is the bottom of content edge of the cell box. + int firstLineBaseline = firstLineBoxBaseline(); + if (firstLineBaseline != -1) + return firstLineBaseline; + return paddingBefore() + borderBefore() + contentLogicalHeight(); +} + +void RenderTableCell::styleWillChange(StyleDifference diff, const RenderStyle* newStyle) +{ + if (parent() && section() && style() && style()->height() != newStyle->height()) + section()->setNeedsCellRecalc(); + + ASSERT(newStyle->display() == TABLE_CELL); + + RenderBlock::styleWillChange(diff, newStyle); +} + +void RenderTableCell::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) +{ + RenderBlock::styleDidChange(diff, oldStyle); + setHasBoxDecorations(true); +} + +// The following rules apply for resolving conflicts and figuring out which border +// to use. +// (1) Borders with the 'border-style' of 'hidden' take precedence over all other conflicting +// borders. Any border with this value suppresses all borders at this location. +// (2) Borders with a style of 'none' have the lowest priority. Only if the border properties of all +// the elements meeting at this edge are 'none' will the border be omitted (but note that 'none' is +// the default value for the border style.) +// (3) If none of the styles are 'hidden' and at least one of them is not 'none', then narrow borders +// are discarded in favor of wider ones. If several have the same 'border-width' then styles are preferred +// in this order: 'double', 'solid', 'dashed', 'dotted', 'ridge', 'outset', 'groove', and the lowest: 'inset'. +// (4) If border styles differ only in color, then a style set on a cell wins over one on a row, +// which wins over a row group, column, column group and, lastly, table. It is undefined which color +// is used when two elements of the same type disagree. +static int compareBorders(const CollapsedBorderValue& border1, const CollapsedBorderValue& border2) +{ + // Sanity check the values passed in. The null border have lowest priority. + if (!border2.exists()) { + if (!border1.exists()) + return 0; + return 1; + } + if (!border1.exists()) + return -1; + + // Rule #1 above. + if (border2.style() == BHIDDEN) { + if (border1.style() == BHIDDEN) + return 0; + return -1; + } + if (border1.style() == BHIDDEN) + return 1; + + // Rule #2 above. A style of 'none' has lowest priority and always loses to any other border. + if (border2.style() == BNONE) { + if (border1.style() == BNONE) + return 0; + return 1; + } + if (border1.style() == BNONE) + return -1; + + // The first part of rule #3 above. Wider borders win. + if (border1.width() != border2.width()) + return border1.width() < border2.width() ? -1 : 1; + + // The borders have equal width. Sort by border style. + if (border1.style() != border2.style()) + return border1.style() < border2.style() ? -1 : 1; + + // The border have the same width and style. Rely on precedence (cell over row over row group, etc.) + if (border1.precedence() == border2.precedence()) + return 0; + return border1.precedence() < border2.precedence() ? -1 : 1; +} + +static CollapsedBorderValue chooseBorder(const CollapsedBorderValue& border1, const CollapsedBorderValue& border2) +{ + const CollapsedBorderValue& border = compareBorders(border1, border2) < 0 ? border2 : border1; + return border.style() == BHIDDEN ? CollapsedBorderValue() : border; +} + +CollapsedBorderValue RenderTableCell::collapsedStartBorder() const +{ + RenderTable* table = this->table(); + bool isStartColumn = col() == 0; + + // For the start border, we need to check, in order of precedence: + // (1) Our start border. + int start = CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderStartColor, table->style()->direction(), table->style()->writingMode()); + int end = CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderEndColor, table->style()->direction(), table->style()->writingMode()); + CollapsedBorderValue result(&style()->borderStart(), style()->visitedDependentColor(start), BCELL); + + // (2) The end border of the preceding cell. + if (RenderTableCell* prevCell = table->cellBefore(this)) { + CollapsedBorderValue prevCellBorder = CollapsedBorderValue(&prevCell->style()->borderEnd(), prevCell->style()->visitedDependentColor(end), BCELL); + result = chooseBorder(prevCellBorder, result); + if (!result.exists()) + return result; + } else if (isStartColumn) { + // (3) Our row's start border. + result = chooseBorder(result, CollapsedBorderValue(&parent()->style()->borderStart(), parent()->style()->visitedDependentColor(start), BROW)); + if (!result.exists()) + return result; + + // (4) Our row group's start border. + result = chooseBorder(result, CollapsedBorderValue(§ion()->style()->borderStart(), section()->style()->visitedDependentColor(start), BROWGROUP)); + if (!result.exists()) + return result; + } + + // (5) Our column and column group's start borders. + bool startColEdge; + bool endColEdge; + RenderTableCol* colElt = table->colElement(col(), &startColEdge, &endColEdge); + if (colElt && startColEdge) { + result = chooseBorder(result, CollapsedBorderValue(&colElt->style()->borderStart(), colElt->style()->visitedDependentColor(start), BCOL)); + if (!result.exists()) + return result; + if (colElt->parent()->isTableCol() && !colElt->previousSibling()) { + result = chooseBorder(result, CollapsedBorderValue(&colElt->parent()->style()->borderStart(), colElt->parent()->style()->visitedDependentColor(start), BCOLGROUP)); + if (!result.exists()) + return result; + } + } + + // (6) The end border of the preceding column. + if (!isStartColumn) { + colElt = table->colElement(col() -1, &startColEdge, &endColEdge); + if (colElt && endColEdge) { + CollapsedBorderValue endBorder = CollapsedBorderValue(&colElt->style()->borderEnd(), colElt->style()->visitedDependentColor(end), BCOL); + result = chooseBorder(endBorder, result); + if (!result.exists()) + return result; + } + } else { + // (7) The table's start border. + result = chooseBorder(result, CollapsedBorderValue(&table->style()->borderStart(), table->style()->visitedDependentColor(start), BTABLE)); + if (!result.exists()) + return result; + } + + return result; +} + +CollapsedBorderValue RenderTableCell::collapsedEndBorder() const +{ + RenderTable* table = this->table(); + bool isEndColumn = table->colToEffCol(col() + colSpan() - 1) == table->numEffCols() - 1; + + // For end border, we need to check, in order of precedence: + // (1) Our end border. + int start = CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderStartColor, table->style()->direction(), table->style()->writingMode()); + int end = CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderEndColor, table->style()->direction(), table->style()->writingMode()); + CollapsedBorderValue result = CollapsedBorderValue(&style()->borderEnd(), style()->visitedDependentColor(end), BCELL); + + // (2) The start border of the following cell. + if (!isEndColumn) { + RenderTableCell* nextCell = table->cellAfter(this); + if (nextCell && nextCell->style()) { + CollapsedBorderValue startBorder = CollapsedBorderValue(&nextCell->style()->borderStart(), nextCell->style()->visitedDependentColor(start), BCELL); + result = chooseBorder(result, startBorder); + if (!result.exists()) + return result; + } + } else { + // (3) Our row's end border. + result = chooseBorder(result, CollapsedBorderValue(&parent()->style()->borderEnd(), parent()->style()->visitedDependentColor(end), BROW)); + if (!result.exists()) + return result; + + // (4) Our row group's end border. + result = chooseBorder(result, CollapsedBorderValue(§ion()->style()->borderEnd(), section()->style()->visitedDependentColor(end), BROWGROUP)); + if (!result.exists()) + return result; + } + + // (5) Our column and column group's end borders. + bool startColEdge; + bool endColEdge; + RenderTableCol* colElt = table->colElement(col() + colSpan() - 1, &startColEdge, &endColEdge); + if (colElt && endColEdge) { + result = chooseBorder(result, CollapsedBorderValue(&colElt->style()->borderEnd(), colElt->style()->visitedDependentColor(end), BCOL)); + if (!result.exists()) + return result; + if (colElt->parent()->isTableCol() && !colElt->nextSibling()) { + result = chooseBorder(result, CollapsedBorderValue(&colElt->parent()->style()->borderEnd(), colElt->parent()->style()->visitedDependentColor(end), BCOLGROUP)); + if (!result.exists()) + return result; + } + } + + // (6) The start border of the next column. + if (!isEndColumn) { + colElt = table->colElement(col() + colSpan(), &startColEdge, &endColEdge); + if (colElt && startColEdge) { + CollapsedBorderValue startBorder = CollapsedBorderValue(&colElt->style()->borderStart(), colElt->style()->visitedDependentColor(start), BCOL); + result = chooseBorder(result, startBorder); + if (!result.exists()) + return result; + } + } else { + // (7) The table's end border. + result = chooseBorder(result, CollapsedBorderValue(&table->style()->borderEnd(), table->style()->visitedDependentColor(end), BTABLE)); + if (!result.exists()) + return result; + } + + return result; +} + +CollapsedBorderValue RenderTableCell::collapsedBeforeBorder() const +{ + RenderTable* table = this->table(); + + // For before border, we need to check, in order of precedence: + // (1) Our before border. + int before = CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderBeforeColor, table->style()->direction(), table->style()->writingMode()); + int after = CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderAfterColor, table->style()->direction(), table->style()->writingMode()); + CollapsedBorderValue result = CollapsedBorderValue(&style()->borderBefore(), style()->visitedDependentColor(before), BCELL); + + RenderTableCell* prevCell = table->cellAbove(this); + if (prevCell) { + // (2) A before cell's after border. + result = chooseBorder(CollapsedBorderValue(&prevCell->style()->borderAfter(), prevCell->style()->visitedDependentColor(after), BCELL), result); + if (!result.exists()) + return result; + } + + // (3) Our row's before border. + result = chooseBorder(result, CollapsedBorderValue(&parent()->style()->borderBefore(), parent()->style()->visitedDependentColor(before), BROW)); + if (!result.exists()) + return result; + + // (4) The previous row's after border. + if (prevCell) { + RenderObject* prevRow = 0; + if (prevCell->section() == section()) + prevRow = parent()->previousSibling(); + else + prevRow = prevCell->section()->lastChild(); + + if (prevRow) { + result = chooseBorder(CollapsedBorderValue(&prevRow->style()->borderAfter(), prevRow->style()->visitedDependentColor(after), BROW), result); + if (!result.exists()) + return result; + } + } + + // Now check row groups. + RenderTableSection* currSection = section(); + if (!row()) { + // (5) Our row group's before border. + result = chooseBorder(result, CollapsedBorderValue(&currSection->style()->borderBefore(), currSection->style()->visitedDependentColor(before), BROWGROUP)); + if (!result.exists()) + return result; + + // (6) Previous row group's after border. + currSection = table->sectionAbove(currSection); + if (currSection) { + result = chooseBorder(CollapsedBorderValue(&currSection->style()->borderAfter(), currSection->style()->visitedDependentColor(after), BROWGROUP), result); + if (!result.exists()) + return result; + } + } + + if (!currSection) { + // (8) Our column and column group's before borders. + RenderTableCol* colElt = table->colElement(col()); + if (colElt) { + result = chooseBorder(result, CollapsedBorderValue(&colElt->style()->borderBefore(), colElt->style()->visitedDependentColor(before), BCOL)); + if (!result.exists()) + return result; + if (colElt->parent()->isTableCol()) { + result = chooseBorder(result, CollapsedBorderValue(&colElt->parent()->style()->borderBefore(), colElt->parent()->style()->visitedDependentColor(before), BCOLGROUP)); + if (!result.exists()) + return result; + } + } + + // (9) The table's before border. + result = chooseBorder(result, CollapsedBorderValue(&table->style()->borderBefore(), table->style()->visitedDependentColor(before), BTABLE)); + if (!result.exists()) + return result; + } + + return result; +} + +CollapsedBorderValue RenderTableCell::collapsedAfterBorder() const +{ + RenderTable* table = this->table(); + + // For after border, we need to check, in order of precedence: + // (1) Our after border. + int before = CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderBeforeColor, table->style()->direction(), table->style()->writingMode()); + int after = CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderAfterColor, table->style()->direction(), table->style()->writingMode()); + CollapsedBorderValue result = CollapsedBorderValue(&style()->borderAfter(), style()->visitedDependentColor(after), BCELL); + + RenderTableCell* nextCell = table->cellBelow(this); + if (nextCell) { + // (2) An after cell's before border. + result = chooseBorder(result, CollapsedBorderValue(&nextCell->style()->borderBefore(), nextCell->style()->visitedDependentColor(before), BCELL)); + if (!result.exists()) + return result; + } + + // (3) Our row's after border. (FIXME: Deal with rowspan!) + result = chooseBorder(result, CollapsedBorderValue(&parent()->style()->borderAfter(), parent()->style()->visitedDependentColor(after), BROW)); + if (!result.exists()) + return result; + + // (4) The next row's before border. + if (nextCell) { + result = chooseBorder(result, CollapsedBorderValue(&nextCell->parent()->style()->borderBefore(), nextCell->parent()->style()->visitedDependentColor(before), BROW)); + if (!result.exists()) + return result; + } + + // Now check row groups. + RenderTableSection* currSection = section(); + if (row() + rowSpan() >= currSection->numRows()) { + // (5) Our row group's after border. + result = chooseBorder(result, CollapsedBorderValue(&currSection->style()->borderAfter(), currSection->style()->visitedDependentColor(after), BROWGROUP)); + if (!result.exists()) + return result; + + // (6) Following row group's before border. + currSection = table->sectionBelow(currSection); + if (currSection) { + result = chooseBorder(result, CollapsedBorderValue(&currSection->style()->borderBefore(), currSection->style()->visitedDependentColor(before), BROWGROUP)); + if (!result.exists()) + return result; + } + } + + if (!currSection) { + // (8) Our column and column group's after borders. + RenderTableCol* colElt = table->colElement(col()); + if (colElt) { + result = chooseBorder(result, CollapsedBorderValue(&colElt->style()->borderAfter(), colElt->style()->visitedDependentColor(after), BCOL)); + if (!result.exists()) return result; + if (colElt->parent()->isTableCol()) { + result = chooseBorder(result, CollapsedBorderValue(&colElt->parent()->style()->borderAfter(), colElt->parent()->style()->visitedDependentColor(after), BCOLGROUP)); + if (!result.exists()) + return result; + } + } + + // (9) The table's after border. + result = chooseBorder(result, CollapsedBorderValue(&table->style()->borderAfter(), table->style()->visitedDependentColor(after), BTABLE)); + if (!result.exists()) + return result; + } + + return result; +} + +CollapsedBorderValue RenderTableCell::collapsedLeftBorder() const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isLeftToRightDirection() ? collapsedStartBorder() : collapsedEndBorder(); + return tableStyle->isFlippedBlocksWritingMode() ? collapsedAfterBorder() : collapsedBeforeBorder(); +} + +CollapsedBorderValue RenderTableCell::collapsedRightBorder() const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isLeftToRightDirection() ? collapsedEndBorder() : collapsedStartBorder(); + return tableStyle->isFlippedBlocksWritingMode() ? collapsedBeforeBorder() : collapsedAfterBorder(); +} + +CollapsedBorderValue RenderTableCell::collapsedTopBorder() const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isFlippedBlocksWritingMode() ? collapsedAfterBorder() : collapsedBeforeBorder(); + return tableStyle->isLeftToRightDirection() ? collapsedStartBorder() : collapsedEndBorder(); +} + +CollapsedBorderValue RenderTableCell::collapsedBottomBorder() const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isFlippedBlocksWritingMode() ? collapsedBeforeBorder() : collapsedAfterBorder(); + return tableStyle->isLeftToRightDirection() ? collapsedEndBorder() : collapsedStartBorder(); +} + +int RenderTableCell::borderLeft() const +{ + return table()->collapseBorders() ? borderHalfLeft(false) : RenderBlock::borderLeft(); +} + +int RenderTableCell::borderRight() const +{ + return table()->collapseBorders() ? borderHalfRight(false) : RenderBlock::borderRight(); +} + +int RenderTableCell::borderTop() const +{ + return table()->collapseBorders() ? borderHalfTop(false) : RenderBlock::borderTop(); +} + +int RenderTableCell::borderBottom() const +{ + return table()->collapseBorders() ? borderHalfBottom(false) : RenderBlock::borderBottom(); +} + +// FIXME: https://bugs.webkit.org/show_bug.cgi?id=46191, make the collapsed border drawing +// work with different block flow values instead of being hard-coded to top-to-bottom. +int RenderTableCell::borderStart() const +{ + return table()->collapseBorders() ? borderHalfStart(false) : RenderBlock::borderStart(); +} + +int RenderTableCell::borderEnd() const +{ + return table()->collapseBorders() ? borderHalfEnd(false) : RenderBlock::borderEnd(); +} + +int RenderTableCell::borderBefore() const +{ + return table()->collapseBorders() ? borderHalfBefore(false) : RenderBlock::borderBefore(); +} + +int RenderTableCell::borderAfter() const +{ + return table()->collapseBorders() ? borderHalfAfter(false) : RenderBlock::borderAfter(); +} + +int RenderTableCell::borderHalfLeft(bool outer) const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isLeftToRightDirection() ? borderHalfStart(outer) : borderHalfEnd(outer); + return tableStyle->isFlippedBlocksWritingMode() ? borderHalfAfter(outer) : borderHalfBefore(outer); +} + +int RenderTableCell::borderHalfRight(bool outer) const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isLeftToRightDirection() ? borderHalfEnd(outer) : borderHalfStart(outer); + return tableStyle->isFlippedBlocksWritingMode() ? borderHalfBefore(outer) : borderHalfAfter(outer); +} + +int RenderTableCell::borderHalfTop(bool outer) const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isFlippedBlocksWritingMode() ? borderHalfAfter(outer) : borderHalfBefore(outer); + return tableStyle->isLeftToRightDirection() ? borderHalfStart(outer) : borderHalfEnd(outer); +} + +int RenderTableCell::borderHalfBottom(bool outer) const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isFlippedBlocksWritingMode() ? borderHalfBefore(outer) : borderHalfAfter(outer); + return tableStyle->isLeftToRightDirection() ? borderHalfEnd(outer) : borderHalfStart(outer); +} + +int RenderTableCell::borderHalfStart(bool outer) const +{ + CollapsedBorderValue border = collapsedStartBorder(); + if (border.exists()) + return (border.width() + ((table()->style()->isLeftToRightDirection() ^ outer) ? 1 : 0)) / 2; // Give the extra pixel to top and left. + return 0; +} + +int RenderTableCell::borderHalfEnd(bool outer) const +{ + CollapsedBorderValue border = collapsedEndBorder(); + if (border.exists()) + return (border.width() + ((table()->style()->isLeftToRightDirection() ^ outer) ? 0 : 1)) / 2; + return 0; +} + +int RenderTableCell::borderHalfBefore(bool outer) const +{ + CollapsedBorderValue border = collapsedBeforeBorder(); + if (border.exists()) + return (border.width() + ((table()->style()->isFlippedBlocksWritingMode() ^ outer) ? 0 : 1)) / 2; // Give the extra pixel to top and left. + return 0; +} + +int RenderTableCell::borderHalfAfter(bool outer) const +{ + CollapsedBorderValue border = collapsedAfterBorder(); + if (border.exists()) + return (border.width() + ((table()->style()->isFlippedBlocksWritingMode() ^ outer) ? 1 : 0)) / 2; + return 0; +} + +void RenderTableCell::paint(PaintInfo& paintInfo, int tx, int ty) +{ + if (paintInfo.phase == PaintPhaseCollapsedTableBorders && style()->visibility() == VISIBLE) { + if (!paintInfo.shouldPaintWithinRoot(this)) + return; + + tx += x(); + ty += y(); + int os = 2 * maximalOutlineSize(paintInfo.phase); + if (ty - table()->outerBorderTop() < paintInfo.rect.bottom() + os && + ty + height() + table()->outerBorderBottom() > paintInfo.rect.y() - os) + paintCollapsedBorder(paintInfo.context, tx, ty, width(), height()); + return; + } + + RenderBlock::paint(paintInfo, tx, ty); +} + +static EBorderStyle collapsedBorderStyle(EBorderStyle style) +{ + if (style == OUTSET) + return GROOVE; + if (style == INSET) + return RIDGE; + return style; +} + +struct CollapsedBorder { + CollapsedBorderValue borderValue; + BoxSide side; + bool shouldPaint; + int x1; + int y1; + int x2; + int y2; + EBorderStyle style; +}; + +class CollapsedBorders { +public: + CollapsedBorders() + : m_count(0) + { + } + + void addBorder(const CollapsedBorderValue& borderValue, BoxSide borderSide, bool shouldPaint, + int x1, int y1, int x2, int y2, EBorderStyle borderStyle) + { + if (borderValue.exists() && shouldPaint) { + m_borders[m_count].borderValue = borderValue; + m_borders[m_count].side = borderSide; + m_borders[m_count].shouldPaint = shouldPaint; + m_borders[m_count].x1 = x1; + m_borders[m_count].x2 = x2; + m_borders[m_count].y1 = y1; + m_borders[m_count].y2 = y2; + m_borders[m_count].style = borderStyle; + m_count++; + } + } + + CollapsedBorder* nextBorder() + { + for (int i = 0; i < m_count; i++) { + if (m_borders[i].borderValue.exists() && m_borders[i].shouldPaint) { + m_borders[i].shouldPaint = false; + return &m_borders[i]; + } + } + + return 0; + } + + CollapsedBorder m_borders[4]; + int m_count; +}; + +static void addBorderStyle(RenderTableCell::CollapsedBorderStyles& borderStyles, CollapsedBorderValue borderValue) +{ + if (!borderValue.exists()) + return; + size_t count = borderStyles.size(); + for (size_t i = 0; i < count; ++i) + if (borderStyles[i] == borderValue) + return; + borderStyles.append(borderValue); +} + +void RenderTableCell::collectBorderStyles(CollapsedBorderStyles& borderStyles) const +{ + addBorderStyle(borderStyles, collapsedStartBorder()); + addBorderStyle(borderStyles, collapsedEndBorder()); + addBorderStyle(borderStyles, collapsedBeforeBorder()); + addBorderStyle(borderStyles, collapsedAfterBorder()); +} + +static int compareBorderStylesForQSort(const void* pa, const void* pb) +{ + const CollapsedBorderValue* a = static_cast<const CollapsedBorderValue*>(pa); + const CollapsedBorderValue* b = static_cast<const CollapsedBorderValue*>(pb); + if (*a == *b) + return 0; + return compareBorders(*a, *b); +} + +void RenderTableCell::sortBorderStyles(CollapsedBorderStyles& borderStyles) +{ + qsort(borderStyles.data(), borderStyles.size(), sizeof(CollapsedBorderValue), + compareBorderStylesForQSort); +} + +void RenderTableCell::paintCollapsedBorder(GraphicsContext* graphicsContext, int tx, int ty, int w, int h) +{ + if (!table()->currentBorderStyle()) + return; + + CollapsedBorderValue leftVal = collapsedLeftBorder(); + CollapsedBorderValue rightVal = collapsedRightBorder(); + CollapsedBorderValue topVal = collapsedTopBorder(); + CollapsedBorderValue bottomVal = collapsedBottomBorder(); + + // Adjust our x/y/width/height so that we paint the collapsed borders at the correct location. + int topWidth = topVal.width(); + int bottomWidth = bottomVal.width(); + int leftWidth = leftVal.width(); + int rightWidth = rightVal.width(); + + tx -= leftWidth / 2; + ty -= topWidth / 2; + w += leftWidth / 2 + (rightWidth + 1) / 2; + h += topWidth / 2 + (bottomWidth + 1) / 2; + + EBorderStyle topStyle = collapsedBorderStyle(topVal.style()); + EBorderStyle bottomStyle = collapsedBorderStyle(bottomVal.style()); + EBorderStyle leftStyle = collapsedBorderStyle(leftVal.style()); + EBorderStyle rightStyle = collapsedBorderStyle(rightVal.style()); + + bool renderTop = topStyle > BHIDDEN && !topVal.isTransparent(); + bool renderBottom = bottomStyle > BHIDDEN && !bottomVal.isTransparent(); + bool renderLeft = leftStyle > BHIDDEN && !leftVal.isTransparent(); + bool renderRight = rightStyle > BHIDDEN && !rightVal.isTransparent(); + + // We never paint diagonals at the joins. We simply let the border with the highest + // precedence paint on top of borders with lower precedence. + CollapsedBorders borders; + borders.addBorder(topVal, BSTop, renderTop, tx, ty, tx + w, ty + topWidth, topStyle); + borders.addBorder(bottomVal, BSBottom, renderBottom, tx, ty + h - bottomWidth, tx + w, ty + h, bottomStyle); + borders.addBorder(leftVal, BSLeft, renderLeft, tx, ty, tx + leftWidth, ty + h, leftStyle); + borders.addBorder(rightVal, BSRight, renderRight, tx + w - rightWidth, ty, tx + w, ty + h, rightStyle); + + for (CollapsedBorder* border = borders.nextBorder(); border; border = borders.nextBorder()) { + if (border->borderValue == *table()->currentBorderStyle()) + drawLineForBoxSide(graphicsContext, border->x1, border->y1, border->x2, border->y2, border->side, + border->borderValue.color(), border->style, 0, 0); + } +} + +void RenderTableCell::paintBackgroundsBehindCell(PaintInfo& paintInfo, int tx, int ty, RenderObject* backgroundObject) +{ + if (!paintInfo.shouldPaintWithinRoot(this)) + return; + + if (!backgroundObject) + return; + + if (style()->visibility() != VISIBLE) + return; + + RenderTable* tableElt = table(); + if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild()) + return; + + if (backgroundObject != this) { + tx += x(); + ty += y(); + } + + int w = width(); + int h = height(); + + Color c = backgroundObject->style()->visitedDependentColor(CSSPropertyBackgroundColor); + const FillLayer* bgLayer = backgroundObject->style()->backgroundLayers(); + + if (bgLayer->hasImage() || c.isValid()) { + // We have to clip here because the background would paint + // on top of the borders otherwise. This only matters for cells and rows. + bool shouldClip = backgroundObject->hasLayer() && (backgroundObject == this || backgroundObject == parent()) && tableElt->collapseBorders(); + if (shouldClip) { + IntRect clipRect(tx + borderLeft(), ty + borderTop(), + w - borderLeft() - borderRight(), h - borderTop() - borderBottom()); + paintInfo.context->save(); + paintInfo.context->clip(clipRect); + } + paintFillLayers(paintInfo, c, bgLayer, tx, ty, w, h, CompositeSourceOver, backgroundObject); + if (shouldClip) + paintInfo.context->restore(); + } +} + +void RenderTableCell::paintBoxDecorations(PaintInfo& paintInfo, int tx, int ty) +{ + if (!paintInfo.shouldPaintWithinRoot(this)) + return; + + RenderTable* tableElt = table(); + if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild()) + return; + + int w = width(); + int h = height(); + + if (style()->boxShadow()) + paintBoxShadow(paintInfo.context, tx, ty, w, h, style(), Normal); + + // Paint our cell background. + paintBackgroundsBehindCell(paintInfo, tx, ty, this); + if (style()->boxShadow()) + paintBoxShadow(paintInfo.context, tx, ty, w, h, style(), Inset); + + if (!style()->hasBorder() || tableElt->collapseBorders()) + return; + + paintBorder(paintInfo.context, tx, ty, w, h, style()); +} + +void RenderTableCell::paintMask(PaintInfo& paintInfo, int tx, int ty) +{ + if (style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask) + return; + + RenderTable* tableElt = table(); + if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild()) + return; + + int w = width(); + int h = height(); + + paintMaskImages(paintInfo, tx, ty, w, h); +} + +void RenderTableCell::scrollbarsChanged(bool horizontalScrollbarChanged, bool verticalScrollbarChanged) +{ + int scrollbarHeight = scrollbarLogicalHeight(); + if (!scrollbarHeight) + return; // Not sure if we should be doing something when a scrollbar goes away or not. + + // We only care if the scrollbar that affects our intrinsic padding has been added. + if ((style()->isHorizontalWritingMode() && !horizontalScrollbarChanged) || + (!style()->isHorizontalWritingMode() && !verticalScrollbarChanged)) + return; + + // Shrink our intrinsic padding as much as possible to accommodate the scrollbar. + if (style()->verticalAlign() == MIDDLE) { + int totalHeight = logicalHeight(); + int heightWithoutIntrinsicPadding = totalHeight - intrinsicPaddingBefore() - intrinsicPaddingAfter(); + totalHeight -= scrollbarHeight; + int newBeforePadding = (totalHeight - heightWithoutIntrinsicPadding) / 2; + int newAfterPadding = totalHeight - heightWithoutIntrinsicPadding - newBeforePadding; + setIntrinsicPaddingBefore(newBeforePadding); + setIntrinsicPaddingAfter(newAfterPadding); + } else + setIntrinsicPaddingAfter(intrinsicPaddingAfter() - scrollbarHeight); +} + +} // namespace WebCore |