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/*
* 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/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* pointer;
};
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();
}
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());
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, SubtreeLayoutScope& layouter)
{
int oldIntrinsicPaddingBefore = intrinsicPaddingBefore();
int oldIntrinsicPaddingAfter = intrinsicPaddingAfter();
int logicalHeightWithoutIntrinsicPadding = pixelSnappedLogicalHeight() - oldIntrinsicPaddingBefore - oldIntrinsicPaddingAfter;
int intrinsicPaddingBefore = 0;
switch (style()->verticalAlign()) {
case VerticalAlignSub:
case VerticalAlignSuper:
case VerticalAlignTextTop:
case VerticalAlignTextBottom:
case VerticalAlignLength:
case VerticalAlignBaseline: {
int baseline = cellBaselinePosition();
if (baseline > borderBefore() + paddingBefore())
intrinsicPaddingBefore = section()->rowBaseline(rowIndex()) - (baseline - oldIntrinsicPaddingBefore);
break;
}
case VerticalAlignTop:
break;
case VerticalAlignMiddle:
intrinsicPaddingBefore = (rowHeight - logicalHeightWithoutIntrinsicPadding) / 2;
break;
case VerticalAlignBottom:
intrinsicPaddingBefore = rowHeight - logicalHeightWithoutIntrinsicPadding;
break;
case VerticalAlignBaselineMiddle:
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 - borderAndPaddingLogicalHeight()).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::localOverflowRectForPaintInvalidation() 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::localOverflowRectForPaintInvalidation();
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::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);
}
}
}
// 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 = {
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 = wrapUnique(new CollapsedBorderValues(newValues));
} 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 = 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);
}
bool LayoutTableCell::boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance, const InlineFlowBox*) const
{
return false;
}
void LayoutTableCell::scrollbarsChanged(bool horizontalScrollbarChanged, bool verticalScrollbarChanged)
{
LayoutBlock::scrollbarsChanged(horizontalScrollbarChanged, verticalScrollbarChanged);
int scrollbarHeight = scrollbarLogicalHeight();
if (!scrollbarHeight)
return; // Not sure if we should be doing something when a scrollbar goes away or not.
// We only care if the scrollbar that affects our intrinsic padding has been added.
if ((isHorizontalWritingMode() && !horizontalScrollbarChanged)
|| (!isHorizontalWritingMode() && !verticalScrollbarChanged))
return;
// Shrink our intrinsic padding as much as possible to accommodate the scrollbar.
if (style()->verticalAlign() == VerticalAlignMiddle) {
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);
}
// 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