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Diffstat (limited to 'Source/WebCore/rendering/RenderTableCell.cpp')
| -rw-r--r-- | Source/WebCore/rendering/RenderTableCell.cpp | 1064 |
1 files changed, 1064 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/RenderTableCell.cpp b/Source/WebCore/rendering/RenderTableCell.cpp new file mode 100644 index 000000000..f43e5c1a0 --- /dev/null +++ b/Source/WebCore/rendering/RenderTableCell.cpp @@ -0,0 +1,1064 @@ +/* + * 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 "CollapsedBorderValue.h" +#include "FloatQuad.h" +#include "GraphicsContext.h" +#include "HTMLNames.h" +#include "HTMLTableCellElement.h" +#include "PaintInfo.h" +#include "RenderTableCol.h" +#include "RenderView.h" +#include "TransformState.h" + +using namespace std; + +namespace WebCore { + +using namespace HTMLNames; + +RenderTableCell::RenderTableCell(Node* node) + : RenderBlock(node) + , m_row(unsetRowIndex) + , m_cellWidthChanged(false) + , m_column(unsetColumnIndex) + , m_hasAssociatedTableCellElement(node && (node->hasTagName(tdTag) || node->hasTagName(thTag))) + , m_intrinsicPaddingBefore(0) + , m_intrinsicPaddingAfter(0) +{ +} + +void RenderTableCell::willBeDestroyed() +{ + RenderTableSection* recalcSection = parent() ? section() : 0; + + RenderBlock::willBeDestroyed(); + + if (recalcSection) + recalcSection->setNeedsCellRecalc(); +} + +unsigned RenderTableCell::colSpan() const +{ + if (UNLIKELY(!m_hasAssociatedTableCellElement)) + return 1; + + return toHTMLTableCellElement(node())->colSpan(); +} + +unsigned RenderTableCell::rowSpan() const +{ + if (UNLIKELY(!m_hasAssociatedTableCellElement)) + return 1; + + return toHTMLTableCellElement(node())->rowSpan(); +} + +void RenderTableCell::colSpanOrRowSpanChanged() +{ + ASSERT(m_hasAssociatedTableCellElement); + ASSERT(node()); + ASSERT(node()->hasTagName(tdTag) || node()->hasTagName(thTag)); + + setNeedsLayoutAndPrefWidthsRecalc(); + if (parent() && section()) + section()->setNeedsCellRecalc(); +} + +Length RenderTableCell::styleOrColLogicalWidth() const +{ + Length w = style()->logicalWidth(); + if (!w.isAuto()) + return w; + + if (RenderTableCol* tableCol = table()->colElement(col())) { + unsigned colSpanCount = colSpan(); + + Length colWidthSum = Length(0, Fixed); + for (unsigned 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<LayoutUnit>(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<LayoutUnit>(w.value(), m_minPreferredLogicalWidth); + } +} + +void RenderTableCell::computeLogicalWidth() +{ +} + +void RenderTableCell::updateLogicalWidth(LayoutUnit w) +{ + if (w == logicalWidth()) + return; + + setLogicalWidth(w); + setCellWidthChanged(true); +} + +void RenderTableCell::layout() +{ + layoutBlock(cellWidthChanged()); + setCellWidthChanged(false); +} + +LayoutUnit RenderTableCell::paddingTop(bool includeIntrinsicPadding) const +{ + LayoutUnit result = RenderBlock::paddingTop(); + if (!includeIntrinsicPadding || !isHorizontalWritingMode()) + return result; + return result + (style()->writingMode() == TopToBottomWritingMode ? intrinsicPaddingBefore() : intrinsicPaddingAfter()); +} + +LayoutUnit RenderTableCell::paddingBottom(bool includeIntrinsicPadding) const +{ + LayoutUnit result = RenderBlock::paddingBottom(); + if (!includeIntrinsicPadding || !isHorizontalWritingMode()) + return result; + return result + (style()->writingMode() == TopToBottomWritingMode ? intrinsicPaddingAfter() : intrinsicPaddingBefore()); +} + +LayoutUnit RenderTableCell::paddingLeft(bool includeIntrinsicPadding) const +{ + LayoutUnit result = RenderBlock::paddingLeft(); + if (!includeIntrinsicPadding || isHorizontalWritingMode()) + return result; + return result + (style()->writingMode() == LeftToRightWritingMode ? intrinsicPaddingBefore() : intrinsicPaddingAfter()); + +} + +LayoutUnit RenderTableCell::paddingRight(bool includeIntrinsicPadding) const +{ + LayoutUnit result = RenderBlock::paddingRight(); + if (!includeIntrinsicPadding || isHorizontalWritingMode()) + return result; + return result + (style()->writingMode() == LeftToRightWritingMode ? intrinsicPaddingAfter() : intrinsicPaddingBefore()); +} + +LayoutUnit RenderTableCell::paddingBefore(bool includeIntrinsicPadding) const +{ + LayoutUnit result = RenderBlock::paddingBefore(); + if (!includeIntrinsicPadding) + return result; + return result + intrinsicPaddingBefore(); +} + +LayoutUnit RenderTableCell::paddingAfter(bool includeIntrinsicPadding) const +{ + LayoutUnit result = RenderBlock::paddingAfter(); + if (!includeIntrinsicPadding) + return result; + return result + intrinsicPaddingAfter(); +} + +void RenderTableCell::setOverrideHeightFromRowHeight(LayoutUnit rowHeight) +{ + clearIntrinsicPadding(); + RenderBlock::setOverrideHeight(max<LayoutUnit>(0, rowHeight - borderBefore() - paddingBefore() - borderAfter() - paddingAfter())); +} + +LayoutSize RenderTableCell::offsetFromContainer(RenderObject* o, const LayoutPoint& point) const +{ + ASSERT(o == container()); + + LayoutSize offset = RenderBlock::offsetFromContainer(o, point); + if (parent()) + offset.expand(-parentBox()->x(), -parentBox()->y()); + + return offset; +} + +LayoutRect RenderTableCell::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer) const +{ + // 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(); + LayoutUnit outlineSize = style()->outlineSize(); + LayoutUnit left = max(borderHalfLeft(true), outlineSize); + LayoutUnit right = max(borderHalfRight(true), outlineSize); + LayoutUnit top = max(borderHalfTop(true), outlineSize); + LayoutUnit 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, -minXVisualOverflow()); + top = max(top, -minYVisualOverflow()); + LayoutRect r(-left, - top, left + max(width() + right, maxXVisualOverflow()), top + max(height() + bottom, maxYVisualOverflow())); + + 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, LayoutRect& r, bool fixed) const +{ + if (repaintContainer == this) + return; + r.setY(r.y()); + RenderView* v = view(); + if ((!v || !v->layoutStateEnabled() || repaintContainer) && parent()) + r.moveBy(-parentBox()->location()); // Rows are in the same coordinate space, so don't add their offset in. + RenderBlock::computeRectForRepaint(repaintContainer, r, fixed); +} + +LayoutUnit RenderTableCell::cellBaselinePosition() 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. + LayoutUnit firstLineBaseline = firstLineBoxBaseline(); + if (firstLineBaseline != -1) + return firstLineBaseline; + return paddingBefore() + borderBefore() + contentLogicalHeight(); +} + +void RenderTableCell::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) +{ + ASSERT(style()->display() == TABLE_CELL); + + RenderBlock::styleDidChange(diff, oldStyle); + setHasBoxDecorations(true); + + if (parent() && section() && oldStyle && style()->height() != oldStyle->height() && rowWasSet()) + section()->rowLogicalHeightChanged(row()); + + // If border was changed, notify table. + if (parent()) { + RenderTable* table = this->table(); + if (table && !table->selfNeedsLayout() && !table->normalChildNeedsLayout()&& oldStyle && oldStyle->border() != style()->border()) + table->invalidateCollapsedBorders(); + } +} + +// 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(IncludeBorderColorOrNot includeColor) 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 startColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderStartColor, table->style()->direction(), table->style()->writingMode()) : 0; + int endColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderEndColor, table->style()->direction(), table->style()->writingMode()) : 0; + CollapsedBorderValue result(style()->borderStart(), includeColor ? style()->visitedDependentColor(startColorProperty) : Color(), BCELL); + + // (2) The end border of the preceding cell. + if (RenderTableCell* prevCell = table->cellBefore(this)) { + CollapsedBorderValue prevCellBorder = CollapsedBorderValue(prevCell->style()->borderEnd(), includeColor ? prevCell->style()->visitedDependentColor(endColorProperty) : Color(), 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(), includeColor ? parent()->style()->visitedDependentColor(startColorProperty) : Color(), BROW)); + if (!result.exists()) + return result; + + // (4) Our row group's start border. + result = chooseBorder(result, CollapsedBorderValue(section()->style()->borderStart(), includeColor ? section()->style()->visitedDependentColor(startColorProperty) : Color(), 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(), includeColor ? colElt->style()->visitedDependentColor(startColorProperty) : Color(), BCOL)); + if (!result.exists()) + return result; + if (colElt->parent()->isTableCol() && !colElt->previousSibling()) { + result = chooseBorder(result, CollapsedBorderValue(colElt->parent()->style()->borderStart(), includeColor ? colElt->parent()->style()->visitedDependentColor(startColorProperty) : Color(), 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(), includeColor ? colElt->style()->visitedDependentColor(endColorProperty) : Color(), BCOL); + result = chooseBorder(endBorder, result); + if (!result.exists()) + return result; + } + } else { + // (7) The table's start border. + result = chooseBorder(result, CollapsedBorderValue(table->style()->borderStart(), includeColor ? table->style()->visitedDependentColor(startColorProperty) : Color(), BTABLE)); + if (!result.exists()) + return result; + } + + return result; +} + +CollapsedBorderValue RenderTableCell::collapsedEndBorder(IncludeBorderColorOrNot includeColor) 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 startColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderStartColor, table->style()->direction(), table->style()->writingMode()) : 0; + int endColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderEndColor, table->style()->direction(), table->style()->writingMode()) : 0; + CollapsedBorderValue result = CollapsedBorderValue(style()->borderEnd(), includeColor ? style()->visitedDependentColor(endColorProperty) : Color(), 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(), includeColor ? nextCell->style()->visitedDependentColor(startColorProperty) : Color(), BCELL); + result = chooseBorder(result, startBorder); + if (!result.exists()) + return result; + } + } else { + // (3) Our row's end border. + result = chooseBorder(result, CollapsedBorderValue(parent()->style()->borderEnd(), includeColor ? parent()->style()->visitedDependentColor(endColorProperty) : Color(), BROW)); + if (!result.exists()) + return result; + + // (4) Our row group's end border. + result = chooseBorder(result, CollapsedBorderValue(section()->style()->borderEnd(), includeColor ? section()->style()->visitedDependentColor(endColorProperty) : Color(), 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(), includeColor ? colElt->style()->visitedDependentColor(endColorProperty) : Color(), BCOL)); + if (!result.exists()) + return result; + if (colElt->parent()->isTableCol() && !colElt->nextSibling()) { + result = chooseBorder(result, CollapsedBorderValue(colElt->parent()->style()->borderEnd(), includeColor ? colElt->parent()->style()->visitedDependentColor(endColorProperty) : Color(), 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(), includeColor ? colElt->style()->visitedDependentColor(startColorProperty) : Color(), BCOL); + result = chooseBorder(result, startBorder); + if (!result.exists()) + return result; + } + } else { + // (7) The table's end border. + result = chooseBorder(result, CollapsedBorderValue(table->style()->borderEnd(), includeColor ? table->style()->visitedDependentColor(endColorProperty) : Color(), BTABLE)); + if (!result.exists()) + return result; + } + + return result; +} + +CollapsedBorderValue RenderTableCell::collapsedBeforeBorder(IncludeBorderColorOrNot includeColor) const +{ + RenderTable* table = this->table(); + + // For before border, we need to check, in order of precedence: + // (1) Our before border. + int beforeColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderBeforeColor, table->style()->direction(), table->style()->writingMode()) : 0; + int afterColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderAfterColor, table->style()->direction(), table->style()->writingMode()) : 0; + CollapsedBorderValue result = CollapsedBorderValue(style()->borderBefore(), includeColor ? style()->visitedDependentColor(beforeColorProperty) : Color(), BCELL); + + RenderTableCell* prevCell = table->cellAbove(this); + if (prevCell) { + // (2) A before cell's after border. + result = chooseBorder(CollapsedBorderValue(prevCell->style()->borderAfter(), includeColor ? prevCell->style()->visitedDependentColor(afterColorProperty) : Color(), BCELL), result); + if (!result.exists()) + return result; + } + + // (3) Our row's before border. + result = chooseBorder(result, CollapsedBorderValue(parent()->style()->borderBefore(), includeColor ? parent()->style()->visitedDependentColor(beforeColorProperty) : Color(), 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(), includeColor ? prevRow->style()->visitedDependentColor(afterColorProperty) : Color(), 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(), includeColor ? currSection->style()->visitedDependentColor(beforeColorProperty) : Color(), 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(), includeColor ? currSection->style()->visitedDependentColor(afterColorProperty) : Color(), 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(), includeColor ? colElt->style()->visitedDependentColor(beforeColorProperty) : Color(), BCOL)); + if (!result.exists()) + return result; + if (colElt->parent()->isTableCol()) { + result = chooseBorder(result, CollapsedBorderValue(colElt->parent()->style()->borderBefore(), includeColor ? colElt->parent()->style()->visitedDependentColor(beforeColorProperty) : Color(), BCOLGROUP)); + if (!result.exists()) + return result; + } + } + + // (9) The table's before border. + result = chooseBorder(result, CollapsedBorderValue(table->style()->borderBefore(), includeColor ? table->style()->visitedDependentColor(beforeColorProperty) : Color(), BTABLE)); + if (!result.exists()) + return result; + } + + return result; +} + +CollapsedBorderValue RenderTableCell::collapsedAfterBorder(IncludeBorderColorOrNot includeColor) const +{ + RenderTable* table = this->table(); + + // For after border, we need to check, in order of precedence: + // (1) Our after border. + int beforeColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderBeforeColor, table->style()->direction(), table->style()->writingMode()) : 0; + int afterColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderAfterColor, table->style()->direction(), table->style()->writingMode()) : 0; + CollapsedBorderValue result = CollapsedBorderValue(style()->borderAfter(), includeColor ? style()->visitedDependentColor(afterColorProperty) : Color(), BCELL); + + RenderTableCell* nextCell = table->cellBelow(this); + if (nextCell) { + // (2) An after cell's before border. + result = chooseBorder(result, CollapsedBorderValue(nextCell->style()->borderBefore(), includeColor ? nextCell->style()->visitedDependentColor(beforeColorProperty) : Color(), BCELL)); + if (!result.exists()) + return result; + } + + // (3) Our row's after border. (FIXME: Deal with rowspan!) + result = chooseBorder(result, CollapsedBorderValue(parent()->style()->borderAfter(), includeColor ? parent()->style()->visitedDependentColor(afterColorProperty) : Color(), BROW)); + if (!result.exists()) + return result; + + // (4) The next row's before border. + if (nextCell) { + result = chooseBorder(result, CollapsedBorderValue(nextCell->parent()->style()->borderBefore(), includeColor ? nextCell->parent()->style()->visitedDependentColor(beforeColorProperty) : Color(), 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(), includeColor ? currSection->style()->visitedDependentColor(afterColorProperty) : Color(), 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(), includeColor ? currSection->style()->visitedDependentColor(beforeColorProperty) : Color(), 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(), includeColor ? colElt->style()->visitedDependentColor(afterColorProperty) : Color(), BCOL)); + if (!result.exists()) return result; + if (colElt->parent()->isTableCol()) { + result = chooseBorder(result, CollapsedBorderValue(colElt->parent()->style()->borderAfter(), includeColor ? colElt->parent()->style()->visitedDependentColor(afterColorProperty) : Color(), BCOLGROUP)); + if (!result.exists()) + return result; + } + } + + // (9) The table's after border. + result = chooseBorder(result, CollapsedBorderValue(table->style()->borderAfter(), includeColor ? table->style()->visitedDependentColor(afterColorProperty) : Color(), BTABLE)); + if (!result.exists()) + return result; + } + + return result; +} + +CollapsedBorderValue RenderTableCell::collapsedLeftBorder(IncludeBorderColorOrNot includeColor) const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isLeftToRightDirection() ? collapsedStartBorder(includeColor) : collapsedEndBorder(includeColor); + return tableStyle->isFlippedBlocksWritingMode() ? collapsedAfterBorder(includeColor) : collapsedBeforeBorder(includeColor); +} + +CollapsedBorderValue RenderTableCell::collapsedRightBorder(IncludeBorderColorOrNot includeColor) const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isLeftToRightDirection() ? collapsedEndBorder(includeColor) : collapsedStartBorder(includeColor); + return tableStyle->isFlippedBlocksWritingMode() ? collapsedBeforeBorder(includeColor) : collapsedAfterBorder(includeColor); +} + +CollapsedBorderValue RenderTableCell::collapsedTopBorder(IncludeBorderColorOrNot includeColor) const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isFlippedBlocksWritingMode() ? collapsedAfterBorder(includeColor) : collapsedBeforeBorder(includeColor); + return tableStyle->isLeftToRightDirection() ? collapsedStartBorder(includeColor) : collapsedEndBorder(includeColor); +} + +CollapsedBorderValue RenderTableCell::collapsedBottomBorder(IncludeBorderColorOrNot includeColor) const +{ + RenderStyle* tableStyle = table()->style(); + if (tableStyle->isHorizontalWritingMode()) + return tableStyle->isFlippedBlocksWritingMode() ? collapsedBeforeBorder(includeColor) : collapsedAfterBorder(includeColor); + return tableStyle->isLeftToRightDirection() ? collapsedEndBorder(includeColor) : collapsedStartBorder(includeColor); +} + +LayoutUnit RenderTableCell::borderLeft() const +{ + return table()->collapseBorders() ? borderHalfLeft(false) : RenderBlock::borderLeft(); +} + +LayoutUnit RenderTableCell::borderRight() const +{ + return table()->collapseBorders() ? borderHalfRight(false) : RenderBlock::borderRight(); +} + +LayoutUnit RenderTableCell::borderTop() const +{ + return table()->collapseBorders() ? borderHalfTop(false) : RenderBlock::borderTop(); +} + +LayoutUnit 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. +LayoutUnit RenderTableCell::borderStart() const +{ + return table()->collapseBorders() ? borderHalfStart(false) : RenderBlock::borderStart(); +} + +LayoutUnit RenderTableCell::borderEnd() const +{ + return table()->collapseBorders() ? borderHalfEnd(false) : RenderBlock::borderEnd(); +} + +LayoutUnit RenderTableCell::borderBefore() const +{ + return table()->collapseBorders() ? borderHalfBefore(false) : RenderBlock::borderBefore(); +} + +LayoutUnit RenderTableCell::borderAfter() const +{ + return table()->collapseBorders() ? borderHalfAfter(false) : RenderBlock::borderAfter(); +} + +LayoutUnit 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); +} + +LayoutUnit 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); +} + +LayoutUnit 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); +} + +LayoutUnit 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); +} + +LayoutUnit RenderTableCell::borderHalfStart(bool outer) const +{ + CollapsedBorderValue border = collapsedStartBorder(DoNotIncludeBorderColor); + if (border.exists()) + return (border.width() + ((table()->style()->isLeftToRightDirection() ^ outer) ? 1 : 0)) / 2; // Give the extra pixel to top and left. + return 0; +} + +LayoutUnit RenderTableCell::borderHalfEnd(bool outer) const +{ + CollapsedBorderValue border = collapsedEndBorder(DoNotIncludeBorderColor); + if (border.exists()) + return (border.width() + ((table()->style()->isLeftToRightDirection() ^ outer) ? 0 : 1)) / 2; + return 0; +} + +LayoutUnit RenderTableCell::borderHalfBefore(bool outer) const +{ + CollapsedBorderValue border = collapsedBeforeBorder(DoNotIncludeBorderColor); + if (border.exists()) + return (border.width() + ((table()->style()->isFlippedBlocksWritingMode() ^ outer) ? 0 : 1)) / 2; // Give the extra pixel to top and left. + return 0; +} + +LayoutUnit RenderTableCell::borderHalfAfter(bool outer) const +{ + CollapsedBorderValue border = collapsedAfterBorder(DoNotIncludeBorderColor); + if (border.exists()) + return (border.width() + ((table()->style()->isFlippedBlocksWritingMode() ^ outer) ? 1 : 0)) / 2; + return 0; +} + +void RenderTableCell::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) +{ + ASSERT(paintInfo.phase != PaintPhaseCollapsedTableBorders); + RenderBlock::paint(paintInfo, paintOffset); +} + +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 (unsigned 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]; + unsigned m_count; +}; + +static void addBorderStyle(RenderTable::CollapsedBorderValues& borderValues, + CollapsedBorderValue borderValue) +{ + if (!borderValue.exists()) + return; + size_t count = borderValues.size(); + for (size_t i = 0; i < count; ++i) + if (borderValues[i].isSameIgnoringColor(borderValue)) + return; + borderValues.append(borderValue); +} + +void RenderTableCell::collectBorderValues(RenderTable::CollapsedBorderValues& borderValues) const +{ + addBorderStyle(borderValues, collapsedStartBorder()); + addBorderStyle(borderValues, collapsedEndBorder()); + addBorderStyle(borderValues, collapsedBeforeBorder()); + addBorderStyle(borderValues, collapsedAfterBorder()); +} + +static int compareBorderValuesForQSort(const void* pa, const void* pb) +{ + const CollapsedBorderValue* a = static_cast<const CollapsedBorderValue*>(pa); + const CollapsedBorderValue* b = static_cast<const CollapsedBorderValue*>(pb); + if (a->isSameIgnoringColor(*b)) + return 0; + return compareBorders(*a, *b); +} + +void RenderTableCell::sortBorderValues(RenderTable::CollapsedBorderValues& borderValues) +{ + qsort(borderValues.data(), borderValues.size(), sizeof(CollapsedBorderValue), + compareBorderValuesForQSort); +} + +void RenderTableCell::paintCollapsedBorders(PaintInfo& paintInfo, const LayoutPoint& paintOffset) +{ + ASSERT(paintInfo.phase == PaintPhaseCollapsedTableBorders); + + if (!paintInfo.shouldPaintWithinRoot(this) || style()->visibility() != VISIBLE) + return; + + LayoutPoint adjustedPaintOffset = paintOffset + location(); + LayoutUnit os = 2 * maximalOutlineSize(paintInfo.phase); + if (!(adjustedPaintOffset.y() - table()->outerBorderTop() < paintInfo.rect.maxY() + os + && adjustedPaintOffset.y() + height() + table()->outerBorderBottom() > paintInfo.rect.y() - os)) + return; + + GraphicsContext* graphicsContext = paintInfo.context; + if (!table()->currentBorderValue() || graphicsContext->paintingDisabled()) + return; + + LayoutRect paintRect = LayoutRect(adjustedPaintOffset, size()); + + 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. + LayoutUnit topWidth = topVal.width(); + LayoutUnit bottomWidth = bottomVal.width(); + LayoutUnit leftWidth = leftVal.width(); + LayoutUnit rightWidth = rightVal.width(); + + LayoutUnit x = paintRect.x() - leftWidth / 2; + LayoutUnit y = paintRect.y() - topWidth / 2; + LayoutUnit w = paintRect.width() + leftWidth / 2 + (rightWidth + 1) / 2; + LayoutUnit h = paintRect.height() + 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, x, y, x + w, y + topWidth, topStyle); + borders.addBorder(bottomVal, BSBottom, renderBottom, x, y + h - bottomWidth, x + w, y + h, bottomStyle); + borders.addBorder(leftVal, BSLeft, renderLeft, x, y, x + leftWidth, y + h, leftStyle); + borders.addBorder(rightVal, BSRight, renderRight, x + w - rightWidth, y, x + w, y + h, rightStyle); + + bool antialias = shouldAntialiasLines(graphicsContext); + + for (CollapsedBorder* border = borders.nextBorder(); border; border = borders.nextBorder()) { + if (border->borderValue.isSameIgnoringColor(*table()->currentBorderValue())) + drawLineForBoxSide(graphicsContext, border->x1, border->y1, border->x2, border->y2, border->side, + border->borderValue.color(), border->style, 0, 0, antialias); + } +} + +void RenderTableCell::paintBackgroundsBehindCell(PaintInfo& paintInfo, const LayoutPoint& paintOffset, 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; + + LayoutPoint adjustedPaintOffset = paintOffset; + if (backgroundObject != this) + adjustedPaintOffset.moveBy(location()); + + 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(); + GraphicsContextStateSaver stateSaver(*paintInfo.context, shouldClip); + if (shouldClip) { + LayoutRect clipRect(adjustedPaintOffset.x() + borderLeft(), adjustedPaintOffset.y() + borderTop(), + width() - borderLeft() - borderRight(), height() - borderTop() - borderBottom()); + paintInfo.context->clip(clipRect); + } + paintFillLayers(paintInfo, c, bgLayer, LayoutRect(adjustedPaintOffset, size()), BackgroundBleedNone, CompositeSourceOver, backgroundObject); + } +} + +void RenderTableCell::paintBoxDecorations(PaintInfo& paintInfo, const LayoutPoint& paintOffset) +{ + if (!paintInfo.shouldPaintWithinRoot(this)) + return; + + RenderTable* tableElt = table(); + if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild()) + return; + + LayoutRect paintRect = LayoutRect(paintOffset, size()); + paintBoxShadow(paintInfo, paintRect, style(), Normal); + + // Paint our cell background. + paintBackgroundsBehindCell(paintInfo, paintOffset, this); + + paintBoxShadow(paintInfo, paintRect, style(), Inset); + + if (!style()->hasBorder() || tableElt->collapseBorders()) + return; + + paintBorder(paintInfo, paintRect, style()); +} + +void RenderTableCell::paintMask(PaintInfo& paintInfo, const LayoutPoint& paintOffset) +{ + if (style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask) + return; + + RenderTable* tableElt = table(); + if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild()) + return; + + paintMaskImages(paintInfo, LayoutRect(paintOffset, size())); +} + +void RenderTableCell::scrollbarsChanged(bool horizontalScrollbarChanged, bool verticalScrollbarChanged) +{ + LayoutUnit 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 ((isHorizontalWritingMode() && !horizontalScrollbarChanged) || + (!isHorizontalWritingMode() && !verticalScrollbarChanged)) + return; + + // Shrink our intrinsic padding as much as possible to accommodate the scrollbar. + if (style()->verticalAlign() == MIDDLE) { + LayoutUnit totalHeight = logicalHeight(); + LayoutUnit heightWithoutIntrinsicPadding = totalHeight - intrinsicPaddingBefore() - intrinsicPaddingAfter(); + totalHeight -= scrollbarHeight; + LayoutUnit newBeforePadding = (totalHeight - heightWithoutIntrinsicPadding) / 2; + LayoutUnit newAfterPadding = totalHeight - heightWithoutIntrinsicPadding - newBeforePadding; + setIntrinsicPaddingBefore(newBeforePadding); + setIntrinsicPaddingAfter(newAfterPadding); + } else + setIntrinsicPaddingAfter(intrinsicPaddingAfter() - scrollbarHeight); +} + +} // namespace WebCore |