| /* |
| * 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 "core/layout/LayoutTableCell.h" |
| |
| #include "core/HTMLNames.h" |
| #include "core/css/StylePropertySet.h" |
| #include "core/html/HTMLTableCellElement.h" |
| #include "core/layout/LayoutAnalyzer.h" |
| #include "core/layout/LayoutTableCol.h" |
| #include "core/layout/SubtreeLayoutScope.h" |
| #include "core/paint/ObjectPaintInvalidator.h" |
| #include "core/paint/PaintLayer.h" |
| #include "core/paint/TableCellPainter.h" |
| #include "core/style/CollapsedBorderValue.h" |
| #include "platform/geometry/FloatQuad.h" |
| #include "platform/geometry/TransformState.h" |
| #include "wtf/PtrUtil.h" |
| |
| namespace blink { |
| |
| using namespace HTMLNames; |
| |
| struct SameSizeAsLayoutTableCell : public LayoutBlockFlow { |
| unsigned bitfields; |
| int paddings[2]; |
| void* pointer1; |
| void* pointer2; |
| }; |
| |
| static_assert(sizeof(LayoutTableCell) == sizeof(SameSizeAsLayoutTableCell), |
| "LayoutTableCell should stay small"); |
| static_assert(sizeof(CollapsedBorderValue) == 8, |
| "CollapsedBorderValue should stay small"); |
| |
| LayoutTableCell::LayoutTableCell(Element* element) |
| : LayoutBlockFlow(element), |
| m_absoluteColumnIndex(unsetColumnIndex), |
| m_cellWidthChanged(false), |
| m_intrinsicPaddingBefore(0), |
| m_intrinsicPaddingAfter(0) { |
| // We only update the flags when notified of DOM changes in |
| // colSpanOrRowSpanChanged() so we need to set their initial values here in |
| // case something asks for colSpan()/rowSpan() before then. |
| updateColAndRowSpanFlags(); |
| } |
| |
| LayoutTableCell::CollapsedBorderValues::CollapsedBorderValues( |
| const LayoutTable& layoutTable, |
| const CollapsedBorderValue& startBorder, |
| const CollapsedBorderValue& endBorder, |
| const CollapsedBorderValue& beforeBorder, |
| const CollapsedBorderValue& afterBorder) |
| : m_layoutTable(layoutTable), |
| m_startBorder(startBorder), |
| m_endBorder(endBorder), |
| m_beforeBorder(beforeBorder), |
| m_afterBorder(afterBorder) {} |
| |
| void LayoutTableCell::CollapsedBorderValues::setCollapsedBorderValues( |
| const CollapsedBorderValues& other) { |
| m_startBorder = other.startBorder(); |
| m_endBorder = other.endBorder(); |
| m_beforeBorder = other.beforeBorder(); |
| m_afterBorder = other.afterBorder(); |
| } |
| |
| String LayoutTableCell::CollapsedBorderValues::debugName() const { |
| return "CollapsedBorderValues"; |
| } |
| |
| LayoutRect LayoutTableCell::CollapsedBorderValues::visualRect() const { |
| return m_layoutTable.visualRect(); |
| } |
| |
| void LayoutTableCell::willBeRemovedFromTree() { |
| LayoutBlockFlow::willBeRemovedFromTree(); |
| |
| section()->setNeedsCellRecalc(); |
| |
| // When borders collapse, removing a cell can affect the the width of |
| // neighboring cells. |
| LayoutTable* enclosingTable = table(); |
| DCHECK(enclosingTable); |
| if (!enclosingTable->collapseBorders()) |
| return; |
| if (previousCell()) { |
| // TODO(dgrogan): Should this be setChildNeedsLayout or setNeedsLayout? |
| // remove-cell-with-border-box.html only passes with setNeedsLayout but |
| // other places use setChildNeedsLayout. |
| previousCell()->setNeedsLayout(LayoutInvalidationReason::TableChanged); |
| previousCell()->setPreferredLogicalWidthsDirty(); |
| } |
| if (nextCell()) { |
| // TODO(dgrogan): Same as above re: setChildNeedsLayout vs setNeedsLayout. |
| nextCell()->setNeedsLayout(LayoutInvalidationReason::TableChanged); |
| nextCell()->setPreferredLogicalWidthsDirty(); |
| } |
| } |
| |
| unsigned LayoutTableCell::parseColSpanFromDOM() const { |
| ASSERT(node()); |
| // TODO(dgrogan): HTMLTableCellElement::colSpan() already clamps to something |
| // smaller than maxColumnIndex; can we just DCHECK here? |
| if (isHTMLTableCellElement(*node())) |
| return std::min<unsigned>(toHTMLTableCellElement(*node()).colSpan(), |
| maxColumnIndex); |
| return 1; |
| } |
| |
| unsigned LayoutTableCell::parseRowSpanFromDOM() const { |
| ASSERT(node()); |
| if (isHTMLTableCellElement(*node())) |
| return std::min<unsigned>(toHTMLTableCellElement(*node()).rowSpan(), |
| maxRowIndex); |
| return 1; |
| } |
| |
| void LayoutTableCell::updateColAndRowSpanFlags() { |
| // The vast majority of table cells do not have a colspan or rowspan, |
| // so we keep a bool to know if we need to bother reading from the DOM. |
| m_hasColSpan = node() && parseColSpanFromDOM() != 1; |
| m_hasRowSpan = node() && parseRowSpanFromDOM() != 1; |
| } |
| |
| void LayoutTableCell::colSpanOrRowSpanChanged() { |
| ASSERT(node()); |
| ASSERT(isHTMLTableCellElement(*node())); |
| |
| updateColAndRowSpanFlags(); |
| |
| setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation( |
| LayoutInvalidationReason::AttributeChanged); |
| if (parent() && section()) |
| section()->setNeedsCellRecalc(); |
| } |
| |
| Length LayoutTableCell::logicalWidthFromColumns( |
| LayoutTableCol* firstColForThisCell, |
| Length widthFromStyle) const { |
| ASSERT(firstColForThisCell && |
| firstColForThisCell == |
| table() |
| ->colElementAtAbsoluteColumn(absoluteColumnIndex()) |
| .innermostColOrColGroup()); |
| LayoutTableCol* tableCol = firstColForThisCell; |
| |
| unsigned colSpanCount = colSpan(); |
| int colWidthSum = 0; |
| 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 widthFromStyle; |
| return colWidth; |
| } |
| |
| colWidthSum += colWidth.value(); |
| tableCol = tableCol->nextColumn(); |
| // 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, see |
| // bug 8126. |
| // FIXME: Why is border/padding ignored in the negative width case? |
| if (colWidthSum > 0) |
| return Length( |
| std::max(0, colWidthSum - borderAndPaddingLogicalWidth().ceil()), |
| Fixed); |
| return Length(colWidthSum, Fixed); |
| } |
| |
| void LayoutTableCell::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(); |
| |
| LayoutBlockFlow::computePreferredLogicalWidths(); |
| if (node() && style()->autoWrap()) { |
| // See if nowrap was set. |
| Length w = styleOrColLogicalWidth(); |
| const AtomicString& nowrap = toElement(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 = |
| std::max(LayoutUnit(w.value()), m_minPreferredLogicalWidth); |
| } |
| } |
| } |
| |
| void LayoutTableCell::addLayerHitTestRects( |
| LayerHitTestRects& layerRects, |
| const PaintLayer* currentLayer, |
| const LayoutPoint& layerOffset, |
| const LayoutRect& containerRect) const { |
| LayoutPoint adjustedLayerOffset = layerOffset; |
| // LayoutTableCell's location includes the offset of it's containing |
| // LayoutTableRow, so we need to subtract that again here (as for |
| // LayoutTableCell::offsetFromContainer. |
| if (parent()) |
| adjustedLayerOffset -= parentBox()->locationOffset(); |
| LayoutBox::addLayerHitTestRects(layerRects, currentLayer, adjustedLayerOffset, |
| containerRect); |
| } |
| |
| void LayoutTableCell::computeIntrinsicPadding(int rowHeight, |
| EVerticalAlign verticalAlign, |
| SubtreeLayoutScope& layouter) { |
| int oldIntrinsicPaddingBefore = intrinsicPaddingBefore(); |
| int oldIntrinsicPaddingAfter = intrinsicPaddingAfter(); |
| int logicalHeightWithoutIntrinsicPadding = pixelSnappedLogicalHeight() - |
| oldIntrinsicPaddingBefore - |
| oldIntrinsicPaddingAfter; |
| |
| int intrinsicPaddingBefore = 0; |
| switch (verticalAlign) { |
| case EVerticalAlign::Sub: |
| case EVerticalAlign::Super: |
| case EVerticalAlign::TextTop: |
| case EVerticalAlign::TextBottom: |
| case EVerticalAlign::Length: |
| case EVerticalAlign::Baseline: { |
| int baseline = cellBaselinePosition(); |
| if (baseline > borderBefore() + paddingBefore()) |
| intrinsicPaddingBefore = section()->rowBaseline(rowIndex()) - |
| (baseline - oldIntrinsicPaddingBefore); |
| break; |
| } |
| case EVerticalAlign::Top: |
| break; |
| case EVerticalAlign::Middle: |
| intrinsicPaddingBefore = |
| (rowHeight - logicalHeightWithoutIntrinsicPadding) / 2; |
| break; |
| case EVerticalAlign::Bottom: |
| intrinsicPaddingBefore = rowHeight - logicalHeightWithoutIntrinsicPadding; |
| break; |
| case EVerticalAlign::BaselineMiddle: |
| break; |
| } |
| |
| int intrinsicPaddingAfter = |
| rowHeight - logicalHeightWithoutIntrinsicPadding - intrinsicPaddingBefore; |
| setIntrinsicPaddingBefore(intrinsicPaddingBefore); |
| setIntrinsicPaddingAfter(intrinsicPaddingAfter); |
| |
| // FIXME: Changing an intrinsic padding shouldn't trigger a relayout as it |
| // only shifts the cell inside the row but doesn't change the logical height. |
| if (intrinsicPaddingBefore != oldIntrinsicPaddingBefore || |
| intrinsicPaddingAfter != oldIntrinsicPaddingAfter) |
| layouter.setNeedsLayout(this, LayoutInvalidationReason::PaddingChanged); |
| } |
| |
| void LayoutTableCell::updateLogicalWidth() {} |
| |
| void LayoutTableCell::setCellLogicalWidth(int tableLayoutLogicalWidth, |
| SubtreeLayoutScope& layouter) { |
| if (tableLayoutLogicalWidth == logicalWidth()) |
| return; |
| |
| layouter.setNeedsLayout(this, LayoutInvalidationReason::SizeChanged); |
| |
| setLogicalWidth(LayoutUnit(tableLayoutLogicalWidth)); |
| setCellWidthChanged(true); |
| } |
| |
| void LayoutTableCell::layout() { |
| ASSERT(needsLayout()); |
| LayoutAnalyzer::Scope analyzer(*this); |
| |
| int oldCellBaseline = cellBaselinePosition(); |
| layoutBlock(cellWidthChanged()); |
| |
| // If we have replaced content, the intrinsic height of our content may have |
| // changed since the last time we laid out. If that's the case the intrinsic |
| // padding we used for layout (the padding required to push the contents of |
| // the cell down to the row's baseline) is included in our new height and |
| // baseline and makes both of them wrong. So if our content's intrinsic height |
| // has changed push the new content up into the intrinsic padding and relayout |
| // so that the rest of table and row layout can use the correct baseline and |
| // height for this cell. |
| if (isBaselineAligned() && section()->rowBaseline(rowIndex()) && |
| cellBaselinePosition() > section()->rowBaseline(rowIndex())) { |
| int newIntrinsicPaddingBefore = |
| std::max(intrinsicPaddingBefore() - |
| std::max(cellBaselinePosition() - oldCellBaseline, 0), |
| 0); |
| setIntrinsicPaddingBefore(newIntrinsicPaddingBefore); |
| SubtreeLayoutScope layouter(*this); |
| layouter.setNeedsLayout(this, LayoutInvalidationReason::TableChanged); |
| layoutBlock(cellWidthChanged()); |
| } |
| |
| // FIXME: This value isn't the intrinsic content logical height, but we need |
| // to update the value as its used by flexbox layout. crbug.com/367324 |
| setIntrinsicContentLogicalHeight(contentLogicalHeight()); |
| |
| setCellWidthChanged(false); |
| } |
| |
| LayoutUnit LayoutTableCell::paddingTop() const { |
| LayoutUnit result = computedCSSPaddingTop(); |
| if (isHorizontalWritingMode()) |
| result += (style()->getWritingMode() == TopToBottomWritingMode |
| ? intrinsicPaddingBefore() |
| : intrinsicPaddingAfter()); |
| // TODO(leviw): The floor call should be removed when Table is sub-pixel |
| // aware. crbug.com/377847 |
| return LayoutUnit(result.floor()); |
| } |
| |
| LayoutUnit LayoutTableCell::paddingBottom() const { |
| LayoutUnit result = computedCSSPaddingBottom(); |
| if (isHorizontalWritingMode()) |
| result += (style()->getWritingMode() == TopToBottomWritingMode |
| ? intrinsicPaddingAfter() |
| : intrinsicPaddingBefore()); |
| // TODO(leviw): The floor call should be removed when Table is sub-pixel |
| // aware. crbug.com/377847 |
| return LayoutUnit(result.floor()); |
| } |
| |
| LayoutUnit LayoutTableCell::paddingLeft() const { |
| LayoutUnit result = computedCSSPaddingLeft(); |
| if (!isHorizontalWritingMode()) |
| result += (style()->getWritingMode() == LeftToRightWritingMode |
| ? intrinsicPaddingBefore() |
| : intrinsicPaddingAfter()); |
| // TODO(leviw): The floor call should be removed when Table is sub-pixel |
| // aware. crbug.com/377847 |
| return LayoutUnit(result.floor()); |
| } |
| |
| LayoutUnit LayoutTableCell::paddingRight() const { |
| LayoutUnit result = computedCSSPaddingRight(); |
| if (!isHorizontalWritingMode()) |
| result += (style()->getWritingMode() == LeftToRightWritingMode |
| ? intrinsicPaddingAfter() |
| : intrinsicPaddingBefore()); |
| // TODO(leviw): The floor call should be removed when Table is sub-pixel |
| // aware. crbug.com/377847 |
| return LayoutUnit(result.floor()); |
| } |
| |
| LayoutUnit LayoutTableCell::paddingBefore() const { |
| return LayoutUnit(computedCSSPaddingBefore().floor() + |
| intrinsicPaddingBefore()); |
| } |
| |
| LayoutUnit LayoutTableCell::paddingAfter() const { |
| return LayoutUnit(computedCSSPaddingAfter().floor() + |
| intrinsicPaddingAfter()); |
| } |
| |
| void LayoutTableCell::setOverrideLogicalContentHeightFromRowHeight( |
| LayoutUnit rowHeight) { |
| clearIntrinsicPadding(); |
| setOverrideLogicalContentHeight( |
| (rowHeight - collapsedBorderAndCSSPaddingLogicalHeight()) |
| .clampNegativeToZero()); |
| } |
| |
| LayoutSize LayoutTableCell::offsetFromContainer(const LayoutObject* o) const { |
| ASSERT(o == container()); |
| |
| LayoutSize offset = LayoutBlockFlow::offsetFromContainer(o); |
| if (parent()) |
| offset -= parentBox()->locationOffset(); |
| |
| return offset; |
| } |
| |
| LayoutRect LayoutTableCell::localVisualRect() 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 issue a paint invalidation of its current rect, which includes any |
| // outside borders of this cell. |
| if (!table()->collapseBorders() || table()->needsSectionRecalc()) |
| return LayoutBlockFlow::localVisualRect(); |
| |
| bool rtl = !styleForCellFlow().isLeftToRightDirection(); |
| int outlineOutset = style()->outlineOutsetExtent(); |
| int left = std::max(borderHalfLeft(true), outlineOutset); |
| int right = std::max(borderHalfRight(true), outlineOutset); |
| int top = std::max(borderHalfTop(true), outlineOutset); |
| int bottom = std::max(borderHalfBottom(true), outlineOutset); |
| if ((left && !rtl) || (right && rtl)) { |
| if (LayoutTableCell* before = table()->cellBefore(this)) { |
| top = std::max(top, before->borderHalfTop(true)); |
| bottom = std::max(bottom, before->borderHalfBottom(true)); |
| } |
| } |
| if ((left && rtl) || (right && !rtl)) { |
| if (LayoutTableCell* after = table()->cellAfter(this)) { |
| top = std::max(top, after->borderHalfTop(true)); |
| bottom = std::max(bottom, after->borderHalfBottom(true)); |
| } |
| } |
| if (top) { |
| if (LayoutTableCell* above = table()->cellAbove(this)) { |
| left = std::max(left, above->borderHalfLeft(true)); |
| right = std::max(right, above->borderHalfRight(true)); |
| } |
| } |
| if (bottom) { |
| if (LayoutTableCell* below = table()->cellBelow(this)) { |
| left = std::max(left, below->borderHalfLeft(true)); |
| right = std::max(right, below->borderHalfRight(true)); |
| } |
| } |
| |
| LayoutRect selfVisualOverflowRect = this->selfVisualOverflowRect(); |
| LayoutPoint location(std::max(LayoutUnit(left), -selfVisualOverflowRect.x()), |
| std::max(LayoutUnit(top), -selfVisualOverflowRect.y())); |
| return LayoutRect(-location.x(), -location.y(), |
| location.x() + std::max(size().width() + right, |
| selfVisualOverflowRect.maxX()), |
| location.y() + std::max(size().height() + bottom, |
| selfVisualOverflowRect.maxY())); |
| } |
| |
| int LayoutTableCell::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. |
| int firstLineBaseline = firstLineBoxBaseline(); |
| if (firstLineBaseline != -1) |
| return firstLineBaseline; |
| return (borderBefore() + paddingBefore() + contentLogicalHeight()).toInt(); |
| } |
| |
| void LayoutTableCell::ensureIsReadyForPaintInvalidation() { |
| LayoutBlockFlow::ensureIsReadyForPaintInvalidation(); |
| if (!usesCompositedCellDisplayItemClients()) |
| return; |
| if (!m_rowBackgroundDisplayItemClient) { |
| m_rowBackgroundDisplayItemClient = WTF::wrapUnique( |
| new LayoutTableCell::RowBackgroundDisplayItemClient(*this)); |
| } |
| } |
| |
| void LayoutTableCell::styleDidChange(StyleDifference diff, |
| const ComputedStyle* oldStyle) { |
| DCHECK_EQ(style()->display(), EDisplay::TableCell); |
| |
| LayoutBlockFlow::styleDidChange(diff, oldStyle); |
| setHasBoxDecorationBackground(true); |
| |
| if (parent() && section() && oldStyle && |
| style()->height() != oldStyle->height()) |
| section()->rowLogicalHeightChanged(row()); |
| |
| // Our intrinsic padding pushes us down to align with the baseline of other |
| // cells on the row. If our vertical-align has changed then so will the |
| // padding needed to align with other cells - clear it so we can recalculate |
| // it from scratch. |
| if (oldStyle && style()->verticalAlign() != oldStyle->verticalAlign()) |
| clearIntrinsicPadding(); |
| |
| // If border was changed, notify table. |
| if (!parent()) |
| return; |
| LayoutTable* table = this->table(); |
| if (!table) |
| return; |
| if (!table->selfNeedsLayout() && !table->normalChildNeedsLayout() && |
| oldStyle && oldStyle->border() != style()->border()) |
| table->invalidateCollapsedBorders(); |
| |
| if (LayoutTableBoxComponent::doCellsHaveDirtyWidth(*this, *table, diff, |
| *oldStyle)) { |
| if (previousCell()) { |
| // TODO(dgrogan) Add a layout test showing that setChildNeedsLayout is |
| // needed instead of setNeedsLayout. |
| previousCell()->setChildNeedsLayout(); |
| previousCell()->setPreferredLogicalWidthsDirty(MarkOnlyThis); |
| } |
| if (nextCell()) { |
| // TODO(dgrogan) Add a layout test showing that setChildNeedsLayout is |
| // needed instead of setNeedsLayout. |
| nextCell()->setChildNeedsLayout(); |
| nextCell()->setPreferredLogicalWidthsDirty(MarkOnlyThis); |
| } |
| } |
| } |
| |
| LayoutTableCell::RowBackgroundDisplayItemClient::RowBackgroundDisplayItemClient( |
| const LayoutTableCell& layoutTableCell) |
| : m_layoutTableCell(layoutTableCell) {} |
| |
| String LayoutTableCell::RowBackgroundDisplayItemClient::debugName() const { |
| return "RowBackground"; |
| } |
| |
| LayoutRect LayoutTableCell::RowBackgroundDisplayItemClient::visualRect() const { |
| return m_layoutTableCell.row()->visualRect(); |
| } |
| |
| // 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 bool compareBorders(const CollapsedBorderValue& border1, |
| const CollapsedBorderValue& border2) { |
| // Sanity check the values passed in. The null border have lowest priority. |
| if (!border2.exists()) |
| return false; |
| if (!border1.exists()) |
| return true; |
| |
| // Rule #1 above. |
| if (border1.style() == BorderStyleHidden) |
| return false; |
| if (border2.style() == BorderStyleHidden) |
| return true; |
| |
| // Rule #2 above. A style of 'none' has lowest priority and always loses to |
| // any other border. |
| if (border2.style() == BorderStyleNone) |
| return false; |
| if (border1.style() == BorderStyleNone) |
| return true; |
| |
| // The first part of rule #3 above. Wider borders win. |
| if (border1.width() != border2.width()) |
| return border1.width() < border2.width(); |
| |
| // The borders have equal width. Sort by border style. |
| if (border1.style() != border2.style()) |
| return border1.style() < border2.style(); |
| |
| // The border have the same width and style. Rely on precedence (cell over |
| // row over row group, etc.) |
| return border1.precedence() < border2.precedence(); |
| } |
| |
| static CollapsedBorderValue chooseBorder(const CollapsedBorderValue& border1, |
| const CollapsedBorderValue& border2) { |
| return compareBorders(border1, border2) ? border2 : border1; |
| } |
| |
| bool LayoutTableCell::hasStartBorderAdjoiningTable() const { |
| bool isStartColumn = !absoluteColumnIndex(); |
| bool isEndColumn = table()->absoluteColumnToEffectiveColumn( |
| absoluteColumnIndex() + colSpan() - 1) == |
| table()->numEffectiveColumns() - 1; |
| bool hasSameDirectionAsTable = hasSameDirectionAs(table()); |
| |
| // The table direction determines the row direction. In mixed directionality, |
| // we cannot guarantee that we have a common border with the table (think a |
| // ltr table with rtl start cell). |
| return (isStartColumn && hasSameDirectionAsTable) || |
| (isEndColumn && !hasSameDirectionAsTable); |
| } |
| |
| bool LayoutTableCell::hasEndBorderAdjoiningTable() const { |
| bool isStartColumn = !absoluteColumnIndex(); |
| bool isEndColumn = table()->absoluteColumnToEffectiveColumn( |
| absoluteColumnIndex() + colSpan() - 1) == |
| table()->numEffectiveColumns() - 1; |
| bool hasSameDirectionAsTable = hasSameDirectionAs(table()); |
| |
| // The table direction determines the row direction. In mixed directionality, |
| // we cannot guarantee that we have a common border with the table (think a |
| // ltr table with ltr end cell). |
| return (isStartColumn && !hasSameDirectionAsTable) || |
| (isEndColumn && hasSameDirectionAsTable); |
| } |
| |
| CollapsedBorderValue LayoutTableCell::computeCollapsedStartBorder( |
| IncludeBorderColorOrNot includeColor) const { |
| LayoutTable* table = this->table(); |
| |
| // For the start border, we need to check, in order of precedence: |
| // (1) Our start border. |
| int startColorProperty = includeColor |
| ? CSSProperty::resolveDirectionAwareProperty( |
| CSSPropertyWebkitBorderStartColor, |
| styleForCellFlow().direction(), |
| styleForCellFlow().getWritingMode()) |
| : 0; |
| int endColorProperty = |
| includeColor |
| ? CSSProperty::resolveDirectionAwareProperty( |
| CSSPropertyWebkitBorderEndColor, styleForCellFlow().direction(), |
| styleForCellFlow().getWritingMode()) |
| : 0; |
| CollapsedBorderValue result( |
| style()->borderStart(), |
| includeColor ? resolveColor(startColorProperty) : Color(), |
| BorderPrecedenceCell); |
| |
| // (2) The end border of the preceding cell. |
| LayoutTableCell* cellBefore = table->cellBefore(this); |
| if (cellBefore) { |
| CollapsedBorderValue cellBeforeAdjoiningBorder = CollapsedBorderValue( |
| cellBefore->borderAdjoiningCellAfter(this), |
| includeColor ? cellBefore->resolveColor(endColorProperty) : Color(), |
| BorderPrecedenceCell); |
| // |result| should be the 2nd argument as |cellBefore| should win in case of |
| // equality per CSS 2.1 (Border conflict resolution, point 4). |
| result = chooseBorder(cellBeforeAdjoiningBorder, result); |
| if (!result.exists()) |
| return result; |
| } |
| |
| bool startBorderAdjoinsTable = hasStartBorderAdjoiningTable(); |
| if (startBorderAdjoinsTable) { |
| // (3) Our row's start border. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| row()->borderAdjoiningStartCell(this), |
| includeColor ? parent()->resolveColor(startColorProperty) : Color(), |
| BorderPrecedenceRow)); |
| if (!result.exists()) |
| return result; |
| |
| // (4) Our row group's start border. |
| result = chooseBorder( |
| result, CollapsedBorderValue( |
| section()->borderAdjoiningStartCell(this), |
| includeColor ? section()->resolveColor(startColorProperty) |
| : Color(), |
| BorderPrecedenceRowGroup)); |
| if (!result.exists()) |
| return result; |
| } |
| |
| // (5) Our column and column group's start borders. |
| LayoutTable::ColAndColGroup colAndColGroup = |
| table->colElementAtAbsoluteColumn(absoluteColumnIndex()); |
| if (colAndColGroup.colgroup && colAndColGroup.adjoinsStartBorderOfColGroup) { |
| // Only apply the colgroup's border if this cell touches the colgroup edge. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| colAndColGroup.colgroup->borderAdjoiningCellStartBorder(this), |
| includeColor |
| ? colAndColGroup.colgroup->resolveColor(startColorProperty) |
| : Color(), |
| BorderPrecedenceColumnGroup)); |
| if (!result.exists()) |
| return result; |
| } |
| if (colAndColGroup.col) { |
| // Always apply the col's border irrespective of whether this cell touches |
| // it. This is per HTML5: "For the purposes of the CSS table model, the col |
| // element is expected to be treated as if it "was present as many times as |
| // its span attribute specifies". |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| colAndColGroup.col->borderAdjoiningCellStartBorder(this), |
| includeColor ? colAndColGroup.col->resolveColor(startColorProperty) |
| : Color(), |
| BorderPrecedenceColumn)); |
| if (!result.exists()) |
| return result; |
| } |
| |
| // (6) The end border of the preceding column. |
| if (cellBefore) { |
| LayoutTable::ColAndColGroup colAndColGroup = |
| table->colElementAtAbsoluteColumn(absoluteColumnIndex() - 1); |
| // Only apply the colgroup's border if this cell touches the colgroup edge. |
| if (colAndColGroup.colgroup && colAndColGroup.adjoinsEndBorderOfColGroup) { |
| result = chooseBorder( |
| CollapsedBorderValue( |
| colAndColGroup.colgroup->borderAdjoiningCellEndBorder(this), |
| includeColor |
| ? colAndColGroup.colgroup->resolveColor(endColorProperty) |
| : Color(), |
| BorderPrecedenceColumnGroup), |
| result); |
| if (!result.exists()) |
| return result; |
| } |
| // Always apply the col's border irrespective of whether this cell touches |
| // it. This is per HTML5: "For the purposes of the CSS table model, the col |
| // element is expected to be treated as if it "was present as many times as |
| // its span attribute specifies". |
| if (colAndColGroup.col) { |
| result = chooseBorder( |
| CollapsedBorderValue( |
| colAndColGroup.col->borderAdjoiningCellAfter(this), |
| includeColor ? colAndColGroup.col->resolveColor(endColorProperty) |
| : Color(), |
| BorderPrecedenceColumn), |
| result); |
| if (!result.exists()) |
| return result; |
| } |
| } |
| |
| if (startBorderAdjoinsTable) { |
| // (7) The table's start border. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| table->tableStartBorderAdjoiningCell(this), |
| includeColor ? table->resolveColor(startColorProperty) : Color(), |
| BorderPrecedenceTable)); |
| if (!result.exists()) |
| return result; |
| } |
| |
| return result; |
| } |
| |
| CollapsedBorderValue LayoutTableCell::computeCollapsedEndBorder( |
| IncludeBorderColorOrNot includeColor) const { |
| LayoutTable* table = this->table(); |
| // Note: We have to use the effective column information instead of whether we |
| // have a cell after as a table doesn't have to be regular (any row can have |
| // less cells than the total cell count). |
| bool isEndColumn = table->absoluteColumnToEffectiveColumn( |
| absoluteColumnIndex() + colSpan() - 1) == |
| table->numEffectiveColumns() - 1; |
| |
| // For end border, we need to check, in order of precedence: |
| // (1) Our end border. |
| int startColorProperty = includeColor |
| ? CSSProperty::resolveDirectionAwareProperty( |
| CSSPropertyWebkitBorderStartColor, |
| styleForCellFlow().direction(), |
| styleForCellFlow().getWritingMode()) |
| : 0; |
| int endColorProperty = |
| includeColor |
| ? CSSProperty::resolveDirectionAwareProperty( |
| CSSPropertyWebkitBorderEndColor, styleForCellFlow().direction(), |
| styleForCellFlow().getWritingMode()) |
| : 0; |
| CollapsedBorderValue result = CollapsedBorderValue( |
| style()->borderEnd(), |
| includeColor ? resolveColor(endColorProperty) : Color(), |
| BorderPrecedenceCell); |
| |
| // (2) The start border of the following cell. |
| if (!isEndColumn) { |
| if (LayoutTableCell* cellAfter = table->cellAfter(this)) { |
| CollapsedBorderValue cellAfterAdjoiningBorder = CollapsedBorderValue( |
| cellAfter->borderAdjoiningCellBefore(this), |
| includeColor ? cellAfter->resolveColor(startColorProperty) : Color(), |
| BorderPrecedenceCell); |
| result = chooseBorder(result, cellAfterAdjoiningBorder); |
| if (!result.exists()) |
| return result; |
| } |
| } |
| |
| bool endBorderAdjoinsTable = hasEndBorderAdjoiningTable(); |
| if (endBorderAdjoinsTable) { |
| // (3) Our row's end border. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| row()->borderAdjoiningEndCell(this), |
| includeColor ? parent()->resolveColor(endColorProperty) : Color(), |
| BorderPrecedenceRow)); |
| if (!result.exists()) |
| return result; |
| |
| // (4) Our row group's end border. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| section()->borderAdjoiningEndCell(this), |
| includeColor ? section()->resolveColor(endColorProperty) : Color(), |
| BorderPrecedenceRowGroup)); |
| if (!result.exists()) |
| return result; |
| } |
| |
| // (5) Our column and column group's end borders. |
| LayoutTable::ColAndColGroup colAndColGroup = |
| table->colElementAtAbsoluteColumn(absoluteColumnIndex() + colSpan() - 1); |
| if (colAndColGroup.colgroup && colAndColGroup.adjoinsEndBorderOfColGroup) { |
| // Only apply the colgroup's border if this cell touches the colgroup edge. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| colAndColGroup.colgroup->borderAdjoiningCellEndBorder(this), |
| includeColor |
| ? colAndColGroup.colgroup->resolveColor(endColorProperty) |
| : Color(), |
| BorderPrecedenceColumnGroup)); |
| if (!result.exists()) |
| return result; |
| } |
| if (colAndColGroup.col) { |
| // Always apply the col's border irrespective of whether this cell touches |
| // it. This is per HTML5: "For the purposes of the CSS table model, the col |
| // element is expected to be treated as if it "was present as many times as |
| // its span attribute specifies". |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| colAndColGroup.col->borderAdjoiningCellEndBorder(this), |
| includeColor ? colAndColGroup.col->resolveColor(endColorProperty) |
| : Color(), |
| BorderPrecedenceColumn)); |
| if (!result.exists()) |
| return result; |
| } |
| |
| // (6) The start border of the next column. |
| if (!isEndColumn) { |
| LayoutTable::ColAndColGroup colAndColGroup = |
| table->colElementAtAbsoluteColumn(absoluteColumnIndex() + colSpan()); |
| if (colAndColGroup.colgroup && |
| colAndColGroup.adjoinsStartBorderOfColGroup) { |
| // Only apply the colgroup's border if this cell touches the colgroup |
| // edge. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| colAndColGroup.colgroup->borderAdjoiningCellStartBorder(this), |
| includeColor |
| ? colAndColGroup.colgroup->resolveColor(startColorProperty) |
| : Color(), |
| BorderPrecedenceColumnGroup)); |
| if (!result.exists()) |
| return result; |
| } |
| if (colAndColGroup.col) { |
| // Always apply the col's border irrespective of whether this cell touches |
| // it. This is per HTML5: "For the purposes of the CSS table model, the |
| // col element is expected to be treated as if it "was present as many |
| // times as its span attribute specifies". |
| result = chooseBorder( |
| result, CollapsedBorderValue( |
| colAndColGroup.col->borderAdjoiningCellBefore(this), |
| includeColor |
| ? colAndColGroup.col->resolveColor(startColorProperty) |
| : Color(), |
| BorderPrecedenceColumn)); |
| if (!result.exists()) |
| return result; |
| } |
| } |
| |
| if (endBorderAdjoinsTable) { |
| // (7) The table's end border. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| table->tableEndBorderAdjoiningCell(this), |
| includeColor ? table->resolveColor(endColorProperty) : Color(), |
| BorderPrecedenceTable)); |
| if (!result.exists()) |
| return result; |
| } |
| |
| return result; |
| } |
| |
| CollapsedBorderValue LayoutTableCell::computeCollapsedBeforeBorder( |
| IncludeBorderColorOrNot includeColor) const { |
| LayoutTable* table = this->table(); |
| |
| // For before border, we need to check, in order of precedence: |
| // (1) Our before border. |
| int beforeColorProperty = includeColor |
| ? CSSProperty::resolveDirectionAwareProperty( |
| CSSPropertyWebkitBorderBeforeColor, |
| styleForCellFlow().direction(), |
| styleForCellFlow().getWritingMode()) |
| : 0; |
| int afterColorProperty = includeColor |
| ? CSSProperty::resolveDirectionAwareProperty( |
| CSSPropertyWebkitBorderAfterColor, |
| styleForCellFlow().direction(), |
| styleForCellFlow().getWritingMode()) |
| : 0; |
| CollapsedBorderValue result = CollapsedBorderValue( |
| style()->borderBefore(), |
| includeColor ? resolveColor(beforeColorProperty) : Color(), |
| BorderPrecedenceCell); |
| |
| LayoutTableCell* prevCell = table->cellAbove(this); |
| if (prevCell) { |
| // (2) A before cell's after border. |
| result = chooseBorder( |
| CollapsedBorderValue( |
| prevCell->style()->borderAfter(), |
| includeColor ? prevCell->resolveColor(afterColorProperty) : Color(), |
| BorderPrecedenceCell), |
| result); |
| if (!result.exists()) |
| return result; |
| } |
| |
| // (3) Our row's before border. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| parent()->style()->borderBefore(), |
| includeColor ? parent()->resolveColor(beforeColorProperty) : Color(), |
| BorderPrecedenceRow)); |
| if (!result.exists()) |
| return result; |
| |
| // (4) The previous row's after border. |
| if (prevCell) { |
| LayoutObject* prevRow = nullptr; |
| if (prevCell->section() == section()) |
| prevRow = parent()->previousSibling(); |
| else |
| prevRow = prevCell->section()->lastRow(); |
| |
| if (prevRow) { |
| result = chooseBorder( |
| CollapsedBorderValue(prevRow->style()->borderAfter(), |
| includeColor |
| ? prevRow->resolveColor(afterColorProperty) |
| : Color(), |
| BorderPrecedenceRow), |
| result); |
| if (!result.exists()) |
| return result; |
| } |
| } |
| |
| // Now check row groups. |
| LayoutTableSection* currSection = section(); |
| if (!rowIndex()) { |
| // (5) Our row group's before border. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| currSection->style()->borderBefore(), |
| includeColor ? currSection->resolveColor(beforeColorProperty) |
| : Color(), |
| BorderPrecedenceRowGroup)); |
| if (!result.exists()) |
| return result; |
| |
| // (6) Previous row group's after border. |
| currSection = table->sectionAbove(currSection, SkipEmptySections); |
| if (currSection) { |
| result = chooseBorder( |
| CollapsedBorderValue( |
| currSection->style()->borderAfter(), |
| includeColor ? currSection->resolveColor(afterColorProperty) |
| : Color(), |
| BorderPrecedenceRowGroup), |
| result); |
| if (!result.exists()) |
| return result; |
| } |
| } |
| |
| if (!currSection) { |
| // (8) Our column and column group's before borders. |
| LayoutTableCol* colElt = |
| table->colElementAtAbsoluteColumn(absoluteColumnIndex()) |
| .innermostColOrColGroup(); |
| if (colElt) { |
| result = chooseBorder( |
| result, CollapsedBorderValue( |
| colElt->style()->borderBefore(), |
| includeColor ? colElt->resolveColor(beforeColorProperty) |
| : Color(), |
| BorderPrecedenceColumn)); |
| if (!result.exists()) |
| return result; |
| if (LayoutTableCol* enclosingColumnGroup = |
| colElt->enclosingColumnGroup()) { |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| enclosingColumnGroup->style()->borderBefore(), |
| includeColor |
| ? enclosingColumnGroup->resolveColor(beforeColorProperty) |
| : Color(), |
| BorderPrecedenceColumnGroup)); |
| if (!result.exists()) |
| return result; |
| } |
| } |
| |
| // (9) The table's before border. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| table->style()->borderBefore(), |
| includeColor ? table->resolveColor(beforeColorProperty) : Color(), |
| BorderPrecedenceTable)); |
| if (!result.exists()) |
| return result; |
| } |
| |
| return result; |
| } |
| |
| CollapsedBorderValue LayoutTableCell::computeCollapsedAfterBorder( |
| IncludeBorderColorOrNot includeColor) const { |
| LayoutTable* table = this->table(); |
| |
| // For after border, we need to check, in order of precedence: |
| // (1) Our after border. |
| int beforeColorProperty = includeColor |
| ? CSSProperty::resolveDirectionAwareProperty( |
| CSSPropertyWebkitBorderBeforeColor, |
| styleForCellFlow().direction(), |
| styleForCellFlow().getWritingMode()) |
| : 0; |
| int afterColorProperty = includeColor |
| ? CSSProperty::resolveDirectionAwareProperty( |
| CSSPropertyWebkitBorderAfterColor, |
| styleForCellFlow().direction(), |
| styleForCellFlow().getWritingMode()) |
| : 0; |
| CollapsedBorderValue result = CollapsedBorderValue( |
| style()->borderAfter(), |
| includeColor ? resolveColor(afterColorProperty) : Color(), |
| BorderPrecedenceCell); |
| |
| LayoutTableCell* nextCell = table->cellBelow(this); |
| if (nextCell) { |
| // (2) An after cell's before border. |
| result = chooseBorder( |
| result, CollapsedBorderValue( |
| nextCell->style()->borderBefore(), |
| includeColor ? nextCell->resolveColor(beforeColorProperty) |
| : Color(), |
| BorderPrecedenceCell)); |
| if (!result.exists()) |
| return result; |
| } |
| |
| // (3) Our row's after border. (FIXME: Deal with rowspan!) |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| parent()->style()->borderAfter(), |
| includeColor ? parent()->resolveColor(afterColorProperty) : Color(), |
| BorderPrecedenceRow)); |
| 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()->resolveColor(beforeColorProperty) |
| : Color(), |
| BorderPrecedenceRow)); |
| if (!result.exists()) |
| return result; |
| } |
| |
| // Now check row groups. |
| LayoutTableSection* currSection = section(); |
| if (rowIndex() + rowSpan() >= currSection->numRows()) { |
| // (5) Our row group's after border. |
| result = chooseBorder( |
| result, CollapsedBorderValue( |
| currSection->style()->borderAfter(), |
| includeColor ? currSection->resolveColor(afterColorProperty) |
| : Color(), |
| BorderPrecedenceRowGroup)); |
| if (!result.exists()) |
| return result; |
| |
| // (6) Following row group's before border. |
| currSection = table->sectionBelow(currSection, SkipEmptySections); |
| if (currSection) { |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| currSection->style()->borderBefore(), |
| includeColor ? currSection->resolveColor(beforeColorProperty) |
| : Color(), |
| BorderPrecedenceRowGroup)); |
| if (!result.exists()) |
| return result; |
| } |
| } |
| |
| if (!currSection) { |
| // (8) Our column and column group's after borders. |
| LayoutTableCol* colElt = |
| table->colElementAtAbsoluteColumn(absoluteColumnIndex()) |
| .innermostColOrColGroup(); |
| if (colElt) { |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| colElt->style()->borderAfter(), |
| includeColor ? colElt->resolveColor(afterColorProperty) : Color(), |
| BorderPrecedenceColumn)); |
| if (!result.exists()) |
| return result; |
| if (LayoutTableCol* enclosingColumnGroup = |
| colElt->enclosingColumnGroup()) { |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| enclosingColumnGroup->style()->borderAfter(), |
| includeColor |
| ? enclosingColumnGroup->resolveColor(afterColorProperty) |
| : Color(), |
| BorderPrecedenceColumnGroup)); |
| if (!result.exists()) |
| return result; |
| } |
| } |
| |
| // (9) The table's after border. |
| result = chooseBorder( |
| result, |
| CollapsedBorderValue( |
| table->style()->borderAfter(), |
| includeColor ? table->resolveColor(afterColorProperty) : Color(), |
| BorderPrecedenceTable)); |
| if (!result.exists()) |
| return result; |
| } |
| |
| return result; |
| } |
| |
| int LayoutTableCell::borderLeft() const { |
| return table()->collapseBorders() ? borderHalfLeft(false) |
| : LayoutBlockFlow::borderLeft(); |
| } |
| |
| int LayoutTableCell::borderRight() const { |
| return table()->collapseBorders() ? borderHalfRight(false) |
| : LayoutBlockFlow::borderRight(); |
| } |
| |
| int LayoutTableCell::borderTop() const { |
| return table()->collapseBorders() ? borderHalfTop(false) |
| : LayoutBlockFlow::borderTop(); |
| } |
| |
| int LayoutTableCell::borderBottom() const { |
| return table()->collapseBorders() ? borderHalfBottom(false) |
| : LayoutBlockFlow::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 LayoutTableCell::borderStart() const { |
| return table()->collapseBorders() ? borderHalfStart(false) |
| : LayoutBlockFlow::borderStart(); |
| } |
| |
| int LayoutTableCell::borderEnd() const { |
| return table()->collapseBorders() ? borderHalfEnd(false) |
| : LayoutBlockFlow::borderEnd(); |
| } |
| |
| int LayoutTableCell::borderBefore() const { |
| return table()->collapseBorders() ? borderHalfBefore(false) |
| : LayoutBlockFlow::borderBefore(); |
| } |
| |
| int LayoutTableCell::borderAfter() const { |
| return table()->collapseBorders() ? borderHalfAfter(false) |
| : LayoutBlockFlow::borderAfter(); |
| } |
| |
| int LayoutTableCell::borderHalfLeft(bool outer) const { |
| const ComputedStyle& styleForCellFlow = this->styleForCellFlow(); |
| if (styleForCellFlow.isHorizontalWritingMode()) |
| return styleForCellFlow.isLeftToRightDirection() ? borderHalfStart(outer) |
| : borderHalfEnd(outer); |
| return styleForCellFlow.isFlippedBlocksWritingMode() |
| ? borderHalfAfter(outer) |
| : borderHalfBefore(outer); |
| } |
| |
| int LayoutTableCell::borderHalfRight(bool outer) const { |
| const ComputedStyle& styleForCellFlow = this->styleForCellFlow(); |
| if (styleForCellFlow.isHorizontalWritingMode()) |
| return styleForCellFlow.isLeftToRightDirection() ? borderHalfEnd(outer) |
| : borderHalfStart(outer); |
| return styleForCellFlow.isFlippedBlocksWritingMode() ? borderHalfBefore(outer) |
| : borderHalfAfter(outer); |
| } |
| |
| int LayoutTableCell::borderHalfTop(bool outer) const { |
| const ComputedStyle& styleForCellFlow = this->styleForCellFlow(); |
| if (styleForCellFlow.isHorizontalWritingMode()) |
| return styleForCellFlow.isFlippedBlocksWritingMode() |
| ? borderHalfAfter(outer) |
| : borderHalfBefore(outer); |
| return styleForCellFlow.isLeftToRightDirection() ? borderHalfStart(outer) |
| : borderHalfEnd(outer); |
| } |
| |
| int LayoutTableCell::borderHalfBottom(bool outer) const { |
| const ComputedStyle& styleForCellFlow = this->styleForCellFlow(); |
| if (styleForCellFlow.isHorizontalWritingMode()) |
| return styleForCellFlow.isFlippedBlocksWritingMode() |
| ? borderHalfBefore(outer) |
| : borderHalfAfter(outer); |
| return styleForCellFlow.isLeftToRightDirection() ? borderHalfEnd(outer) |
| : borderHalfStart(outer); |
| } |
| |
| int LayoutTableCell::borderHalfStart(bool outer) const { |
| CollapsedBorderValue border = |
| computeCollapsedStartBorder(DoNotIncludeBorderColor); |
| if (border.exists()) |
| return (border.width() + |
| ((styleForCellFlow().isLeftToRightDirection() ^ outer) ? 1 : 0)) / |
| 2; // Give the extra pixel to top and left. |
| return 0; |
| } |
| |
| int LayoutTableCell::borderHalfEnd(bool outer) const { |
| CollapsedBorderValue border = |
| computeCollapsedEndBorder(DoNotIncludeBorderColor); |
| if (border.exists()) |
| return (border.width() + |
| ((styleForCellFlow().isLeftToRightDirection() ^ outer) ? 0 : 1)) / |
| 2; |
| return 0; |
| } |
| |
| int LayoutTableCell::borderHalfBefore(bool outer) const { |
| CollapsedBorderValue border = |
| computeCollapsedBeforeBorder(DoNotIncludeBorderColor); |
| if (border.exists()) |
| return (border.width() + |
| ((styleForCellFlow().isFlippedBlocksWritingMode() ^ outer) ? 0 |
| : 1)) / |
| 2; // Give the extra pixel to top and left. |
| return 0; |
| } |
| |
| int LayoutTableCell::borderHalfAfter(bool outer) const { |
| CollapsedBorderValue border = |
| computeCollapsedAfterBorder(DoNotIncludeBorderColor); |
| if (border.exists()) |
| return (border.width() + |
| ((styleForCellFlow().isFlippedBlocksWritingMode() ^ outer) ? 1 |
| : 0)) / |
| 2; |
| return 0; |
| } |
| |
| void LayoutTableCell::paint(const PaintInfo& paintInfo, |
| const LayoutPoint& paintOffset) const { |
| TableCellPainter(*this).paint(paintInfo, paintOffset); |
| } |
| |
| static void addBorderStyle(LayoutTable::CollapsedBorderValues& borderValues, |
| CollapsedBorderValue borderValue) { |
| if (!borderValue.isVisible()) |
| return; |
| size_t count = borderValues.size(); |
| for (size_t i = 0; i < count; ++i) { |
| if (borderValues[i].isSameIgnoringColor(borderValue)) |
| return; |
| } |
| borderValues.append(borderValue); |
| } |
| |
| void LayoutTableCell::collectBorderValues( |
| LayoutTable::CollapsedBorderValues& borderValues) { |
| CollapsedBorderValues newValues( |
| *table(), computeCollapsedStartBorder(), computeCollapsedEndBorder(), |
| computeCollapsedBeforeBorder(), computeCollapsedAfterBorder()); |
| |
| bool changed = false; |
| if (!newValues.startBorder().isVisible() && |
| !newValues.endBorder().isVisible() && |
| !newValues.beforeBorder().isVisible() && |
| !newValues.afterBorder().isVisible()) { |
| changed = !!m_collapsedBorderValues; |
| m_collapsedBorderValues = nullptr; |
| } else if (!m_collapsedBorderValues) { |
| changed = true; |
| m_collapsedBorderValues = WTF::wrapUnique(new CollapsedBorderValues( |
| *table(), newValues.startBorder(), newValues.endBorder(), |
| newValues.beforeBorder(), newValues.afterBorder())); |
| } else { |
| // We check visuallyEquals so that the table cell is invalidated only if a |
| // changed collapsed border is visible in the first place. |
| changed = !m_collapsedBorderValues->startBorder().visuallyEquals( |
| newValues.startBorder()) || |
| !m_collapsedBorderValues->endBorder().visuallyEquals( |
| newValues.endBorder()) || |
| !m_collapsedBorderValues->beforeBorder().visuallyEquals( |
| newValues.beforeBorder()) || |
| !m_collapsedBorderValues->afterBorder().visuallyEquals( |
| newValues.afterBorder()); |
| if (changed) |
| m_collapsedBorderValues->setCollapsedBorderValues(newValues); |
| } |
| |
| // If collapsed borders changed, invalidate the cell's display item client on |
| // the table's backing. |
| // TODO(crbug.com/451090#c5): Need a way to invalidate/repaint the borders |
| // only. |
| if (changed) |
| ObjectPaintInvalidator(*table()) |
| .slowSetPaintingLayerNeedsRepaintAndInvalidateDisplayItemClient( |
| *this, PaintInvalidationStyleChange); |
| |
| addBorderStyle(borderValues, newValues.startBorder()); |
| addBorderStyle(borderValues, newValues.endBorder()); |
| addBorderStyle(borderValues, newValues.beforeBorder()); |
| addBorderStyle(borderValues, newValues.afterBorder()); |
| } |
| |
| void LayoutTableCell::sortBorderValues( |
| LayoutTable::CollapsedBorderValues& borderValues) { |
| std::sort(borderValues.begin(), borderValues.end(), compareBorders); |
| } |
| |
| void LayoutTableCell::paintBoxDecorationBackground( |
| const PaintInfo& paintInfo, |
| const LayoutPoint& paintOffset) const { |
| TableCellPainter(*this).paintBoxDecorationBackground(paintInfo, paintOffset); |
| } |
| |
| void LayoutTableCell::paintMask(const PaintInfo& paintInfo, |
| const LayoutPoint& paintOffset) const { |
| TableCellPainter(*this).paintMask(paintInfo, paintOffset); |
| } |
| |
| void LayoutTableCell::scrollbarsChanged(bool horizontalScrollbarChanged, |
| bool verticalScrollbarChanged, |
| ScrollbarChangeContext context) { |
| LayoutBlock::scrollbarsChanged(horizontalScrollbarChanged, |
| verticalScrollbarChanged); |
| if (context != Layout) |
| return; |
| |
| int scrollbarHeight = scrollbarLogicalHeight(); |
| // Not sure if we should be doing something when a scrollbar goes away or not. |
| if (!scrollbarHeight) |
| return; |
| |
| // 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() == EVerticalAlign::Middle) { |
| LayoutUnit totalHeight = logicalHeight(); |
| LayoutUnit heightWithoutIntrinsicPadding = |
| totalHeight - intrinsicPaddingBefore() - intrinsicPaddingAfter(); |
| totalHeight -= scrollbarHeight; |
| LayoutUnit newBeforePadding = |
| (totalHeight - heightWithoutIntrinsicPadding) / 2; |
| LayoutUnit newAfterPadding = |
| totalHeight - heightWithoutIntrinsicPadding - newBeforePadding; |
| setIntrinsicPaddingBefore(newBeforePadding.toInt()); |
| setIntrinsicPaddingAfter(newAfterPadding.toInt()); |
| } else { |
| setIntrinsicPaddingAfter(intrinsicPaddingAfter() - scrollbarHeight); |
| } |
| } |
| |
| LayoutTableCell* LayoutTableCell::createAnonymous(Document* document) { |
| LayoutTableCell* layoutObject = new LayoutTableCell(nullptr); |
| layoutObject->setDocumentForAnonymous(document); |
| return layoutObject; |
| } |
| |
| LayoutTableCell* LayoutTableCell::createAnonymousWithParent( |
| const LayoutObject* parent) { |
| LayoutTableCell* newCell = |
| LayoutTableCell::createAnonymous(&parent->document()); |
| RefPtr<ComputedStyle> newStyle = |
| ComputedStyle::createAnonymousStyleWithDisplay(parent->styleRef(), |
| EDisplay::TableCell); |
| newCell->setStyle(newStyle.release()); |
| return newCell; |
| } |
| |
| bool LayoutTableCell::backgroundIsKnownToBeOpaqueInRect( |
| const LayoutRect& localRect) const { |
| // If this object has layer, the area of collapsed borders should be |
| // transparent to expose the collapsed borders painted on the underlying |
| // layer. |
| if (hasLayer() && table()->collapseBorders()) |
| return false; |
| return LayoutBlockFlow::backgroundIsKnownToBeOpaqueInRect(localRect); |
| } |
| |
| bool LayoutTableCell::usesCompositedCellDisplayItemClients() const { |
| // In certain cases such as collapsed borders for composited table cells we |
| // paint content for the cell into the table graphics layer backing and so |
| // must use the table's visual rect. |
| return (hasLayer() && layer()->compositingState() != NotComposited) || |
| RuntimeEnabledFeatures::slimmingPaintV2Enabled(); |
| } |
| |
| void LayoutTableCell::invalidateDisplayItemClients( |
| PaintInvalidationReason reason) const { |
| LayoutBlockFlow::invalidateDisplayItemClients(reason); |
| |
| if (!usesCompositedCellDisplayItemClients()) |
| return; |
| |
| ObjectPaintInvalidator invalidator(*this); |
| if (m_collapsedBorderValues) |
| invalidator.invalidateDisplayItemClient(*m_collapsedBorderValues, reason); |
| if (m_rowBackgroundDisplayItemClient) { |
| invalidator.invalidateDisplayItemClient(*m_rowBackgroundDisplayItemClient, |
| reason); |
| } |
| } |
| |
| // TODO(lunalu): Deliberately dump the "inner" box of table cells, since that |
| // is what current results reflect. We'd like to clean up the results to dump |
| // both the outer box and the intrinsic padding so that both bits of information |
| // are captured by the results. |
| LayoutRect LayoutTableCell::debugRect() const { |
| LayoutRect rect = LayoutRect( |
| location().x(), location().y() + intrinsicPaddingBefore(), size().width(), |
| size().height() - intrinsicPaddingBefore() - intrinsicPaddingAfter()); |
| |
| LayoutBlock* cb = containingBlock(); |
| if (cb) |
| cb->adjustChildDebugRect(rect); |
| |
| return rect; |
| } |
| |
| void LayoutTableCell::adjustChildDebugRect(LayoutRect& r) const { |
| r.move(0, -intrinsicPaddingBefore()); |
| } |
| |
| } // namespace blink |
