void TextAutosizer::inflateAutoTable(LayoutTable* table)
{
ASSERT(table);
ASSERT(!table->style()->isFixedTableLayout());
ASSERT(table->containingBlock());
Cluster* cluster = currentCluster();
if (cluster->m_root != table)
return;
// Pre-inflate cells that have enough text so that their inflated preferred widths will be used
// for column sizing.
for (LayoutObject* section = table->firstChild(); section; section = section->nextSibling()) {
if (!section->isTableSection())
continue;
for (LayoutTableRow* row = toLayoutTableSection(section)->firstRow(); row; row = row->nextRow()) {
for (LayoutTableCell* cell = row->firstCell(); cell; cell = cell->nextCell()) {
if (!cell->needsLayout())
continue;
beginLayout(cell);
inflate(cell, DescendToInnerBlocks);
endLayout(cell);
}
}
}
}
void LayoutTableCol::styleDidChange(StyleDifference diff, const ComputedStyle* oldStyle)
{
LayoutBox::styleDidChange(diff, oldStyle);
// If border was changed, notify table.
if (parent()) {
LayoutTable* table = this->table();
if (table && !table->selfNeedsLayout() && !table->normalChildNeedsLayout() && oldStyle && oldStyle->border() != style()->border()) {
table->invalidateCollapsedBorders();
} else if (oldStyle && oldStyle->logicalWidth() != style()->logicalWidth()) {
// FIXME : setPreferredLogicalWidthsDirty is done for all cells as of now.
// Need to find a better way so that only the cells which are changed by
// the col width should have preferred logical widths recomputed.
for (LayoutObject* child = table->children()->firstChild(); child; child = child->nextSibling()) {
if (!child->isTableSection())
continue;
LayoutTableSection* section = toLayoutTableSection(child);
for (LayoutTableRow* row = section->firstRow(); row; row = row->nextRow()) {
for (LayoutTableCell* cell = row->firstCell(); cell; cell = cell->nextCell())
cell->setPreferredLogicalWidthsDirty();
}
}
}
}
}
void AXTableCell::rowIndexRange(std::pair<unsigned, unsigned>& rowRange)
{
if (!m_layoutObject || !m_layoutObject->isTableCell())
return;
LayoutTableCell* layoutCell = toLayoutTableCell(m_layoutObject);
rowRange.first = layoutCell->rowIndex();
rowRange.second = layoutCell->rowSpan();
// since our table might have multiple sections, we have to offset our row appropriately
LayoutTableSection* section = layoutCell->section();
LayoutTable* table = layoutCell->table();
if (!table || !section)
return;
LayoutTableSection* tableSection = table->topSection();
unsigned rowOffset = 0;
while (tableSection) {
if (tableSection == section)
break;
rowOffset += tableSection->numRows();
tableSection = table->sectionBelow(tableSection, SkipEmptySections);
}
rowRange.first += rowOffset;
}
AccessibilityRole AXTableCell::scanToDecideHeaderRole()
{
if (!isTableHeaderCell())
return CellRole;
// Check scope attribute first.
if (isRowHeaderCell())
return RowHeaderRole;
if (isColumnHeaderCell())
return ColumnHeaderRole;
// Check the previous cell and the next cell on the same row.
LayoutTableCell* layoutCell = toLayoutTableCell(m_layoutObject);
AccessibilityRole headerRole = CellRole;
// if header is preceded by header cells on the same row, then it is a
// column header. If it is preceded by other cells then it's a row header.
if ((headerRole = decideRoleFromSibling(layoutCell->previousCell())) != CellRole)
return headerRole;
// if header is followed by header cells on the same row, then it is a
// column header. If it is followed by other cells then it's a row header.
if ((headerRole = decideRoleFromSibling(layoutCell->nextCell())) != CellRole)
return headerRole;
// If there are no other cells on that row, then it is a column header.
return ColumnHeaderRole;
}
void LayoutTableRow::layout()
{
ASSERT(needsLayout());
LayoutAnalyzer::Scope analyzer(*this);
// Table rows do not add translation.
LayoutState state(*this, LayoutSize());
for (LayoutTableCell* cell = firstCell(); cell; cell = cell->nextCell()) {
SubtreeLayoutScope layouter(*cell);
if (!cell->needsLayout())
cell->markForPaginationRelayoutIfNeeded(layouter);
if (cell->needsLayout())
cell->layout();
}
m_overflow.clear();
addVisualEffectOverflow();
// We do not call addOverflowFromCell here. The cell are laid out to be
// measured above and will be sized correctly in a follow-up phase.
// We only ever need to issue paint invalidations if our cells didn't, which means that they didn't need
// layout, so we know that our bounds didn't change. This code is just making up for
// the fact that we did not invalidate paints in setStyle() because we had a layout hint.
if (selfNeedsLayout()) {
for (LayoutTableCell* cell = firstCell(); cell; cell = cell->nextCell()) {
// FIXME: Is this needed when issuing paint invalidations after layout?
cell->setShouldDoFullPaintInvalidation();
}
}
// LayoutTableSection::layoutRows will set our logical height and width later, so it calls updateLayerTransform().
clearNeedsLayout();
}
void LayoutTableRow::addChild(LayoutObject* child, LayoutObject* beforeChild)
{
if (!child->isTableCell()) {
LayoutObject* last = beforeChild;
if (!last)
last = lastCell();
if (last && last->isAnonymous() && last->isTableCell() && !last->isBeforeOrAfterContent()) {
LayoutTableCell* lastCell = toLayoutTableCell(last);
if (beforeChild == lastCell)
beforeChild = lastCell->firstChild();
lastCell->addChild(child, beforeChild);
return;
}
if (beforeChild && !beforeChild->isAnonymous() && beforeChild->parent() == this) {
LayoutObject* cell = beforeChild->previousSibling();
if (cell && cell->isTableCell() && cell->isAnonymous()) {
cell->addChild(child);
return;
}
}
// If beforeChild is inside an anonymous cell, insert into the cell.
if (last && !last->isTableCell() && last->parent() && last->parent()->isAnonymous() && !last->parent()->isBeforeOrAfterContent()) {
last->parent()->addChild(child, beforeChild);
return;
}
LayoutTableCell* cell = LayoutTableCell::createAnonymousWithParent(this);
addChild(cell, beforeChild);
cell->addChild(child);
return;
}
if (beforeChild && beforeChild->parent() != this)
beforeChild = splitAnonymousBoxesAroundChild(beforeChild);
LayoutTableCell* cell = toLayoutTableCell(child);
ASSERT(!beforeChild || beforeChild->isTableCell());
LayoutBox::addChild(cell, beforeChild);
// Generated content can result in us having a null section so make sure to null check our parent.
if (parent())
section()->addCell(cell, this);
if (beforeChild || nextRow())
section()->setNeedsCellRecalc();
}
HTMLTableCellElement* HTMLTableCellElement::cellAbove() const
{
LayoutObject* cellLayoutObject = layoutObject();
if (!cellLayoutObject)
return nullptr;
if (!cellLayoutObject->isTableCell())
return nullptr;
LayoutTableCell* tableCellLayoutObject = toLayoutTableCell(cellLayoutObject);
LayoutTableCell* cellAboveLayoutObject = tableCellLayoutObject->table()->cellAbove(tableCellLayoutObject);
if (!cellAboveLayoutObject)
return nullptr;
return toHTMLTableCellElement(cellAboveLayoutObject->node());
}
void TableLayoutAlgorithmFixed::willChangeTableLayout()
{
// When switching table layout algorithm, we need to dirty the preferred
// logical widths as we cleared the bits without computing them.
// (see calcWidthArray above.) This optimization is preferred to always
// computing the logical widths we never intended to use.
m_table->recalcSectionsIfNeeded();
for (LayoutTableSection* section = m_table->topNonEmptySection(); section; section = m_table->sectionBelow(section)) {
for (unsigned i = 0; i < section->numRows(); i++) {
LayoutTableRow* row = section->rowLayoutObjectAt(i);
if (!row)
continue;
for (LayoutTableCell* cell = row->firstCell(); cell; cell = cell->nextCell())
cell->setPreferredLogicalWidthsDirty();
}
}
}
void AXTableColumn::headerObjectsForColumn(AXObjectVector& headers) {
if (!m_parent)
return;
LayoutObject* layoutObject = m_parent->getLayoutObject();
if (!layoutObject)
return;
if (!m_parent->isAXTable())
return;
if (toAXTable(m_parent)->isAriaTable()) {
for (const auto& cell : children()) {
if (cell->roleValue() == ColumnHeaderRole)
headers.append(cell);
}
return;
}
if (!layoutObject->isTable())
return;
LayoutTable* table = toLayoutTable(layoutObject);
LayoutTableSection* tableSection = table->topSection();
for (; tableSection;
tableSection = table->sectionBelow(tableSection, SkipEmptySections)) {
unsigned numCols = tableSection->numEffectiveColumns();
if (m_columnIndex >= numCols)
continue;
unsigned numRows = tableSection->numRows();
for (unsigned r = 0; r < numRows; r++) {
LayoutTableCell* layoutCell =
tableSection->primaryCellAt(r, m_columnIndex);
if (!layoutCell)
continue;
AXObject* cell = axObjectCache().getOrCreate(layoutCell->node());
if (!cell || !cell->isTableCell() || headers.contains(cell))
continue;
if (toAXTableCell(cell)->scanToDecideHeaderRole() == ColumnHeaderRole)
headers.append(cell);
}
}
}
// Hit Testing
bool LayoutTableRow::nodeAtPoint(HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction action)
{
// Table rows cannot ever be hit tested. Effectively they do not exist.
// Just forward to our children always.
for (LayoutTableCell* cell = lastCell(); cell; cell = cell->previousCell()) {
// FIXME: We have to skip over inline flows, since they can show up inside table rows
// at the moment (a demoted inline <form> for example). If we ever implement a
// table-specific hit-test method (which we should do for performance reasons anyway),
// then we can remove this check.
if (!cell->hasSelfPaintingLayer()) {
LayoutPoint cellPoint = flipForWritingModeForChild(cell, accumulatedOffset);
if (cell->nodeAtPoint(result, locationInContainer, cellPoint, action)) {
updateHitTestResult(result, locationInContainer.point() - toLayoutSize(cellPoint));
return true;
}
}
}
return false;
}
void TableRowPainter::paint(const PaintInfo& paintInfo,
const LayoutPoint& paintOffset) {
DCHECK(m_layoutTableRow.hasSelfPaintingLayer());
// TODO(crbug.com/577282): This painting order is inconsistent with other
// outlines.
if (shouldPaintSelfOutline(paintInfo.phase))
paintOutline(paintInfo, paintOffset);
if (paintInfo.phase == PaintPhaseSelfOutlineOnly)
return;
PaintInfo paintInfoForCells = paintInfo.forDescendants();
if (shouldPaintSelfBlockBackground(paintInfo.phase)) {
paintBoxShadow(paintInfo, paintOffset, Normal);
if (m_layoutTableRow.styleRef().hasBackground()) {
// Paint row background of behind the cells.
for (LayoutTableCell* cell = m_layoutTableRow.firstCell(); cell;
cell = cell->nextCell())
TableCellPainter(*cell).paintContainerBackgroundBehindCell(
paintInfoForCells, paintOffset, m_layoutTableRow,
DisplayItem::kTableCellBackgroundFromRow);
}
paintBoxShadow(paintInfo, paintOffset, Inset);
}
if (paintInfo.phase == PaintPhaseSelfBlockBackgroundOnly)
return;
for (LayoutTableCell* cell = m_layoutTableRow.firstCell(); cell;
cell = cell->nextCell()) {
if (!cell->hasSelfPaintingLayer())
cell->paint(paintInfoForCells, paintOffset);
}
}
void TableSectionPainter::paintCell(const LayoutTableCell& cell, const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
LayoutPoint cellPoint = m_layoutTableSection.flipForWritingModeForChild(&cell, paintOffset);
PaintPhase paintPhase = paintInfo.phase;
const LayoutTableRow* row = toLayoutTableRow(cell.parent());
if ((paintPhase == PaintPhaseSelfBlockBackground || paintPhase == PaintPhaseBlockBackground)
&& BlockPainter(cell).intersectsPaintRect(paintInfo, paintOffset)) {
// We need to handle painting a stack of backgrounds. This stack (from bottom to top) consists of
// the column group, column, row group, row, and then the cell.
LayoutTable::ColAndColGroup colAndColGroup = m_layoutTableSection.table()->colElement(cell.col());
LayoutTableCol* column = colAndColGroup.col;
LayoutTableCol* columnGroup = colAndColGroup.colgroup;
TableCellPainter tableCellPainter(cell);
// Column groups and columns first.
// FIXME: Columns and column groups do not currently support opacity, and they are being painted "too late" in
// the stack, since we have already opened a transparency layer (potentially) for the table row group.
// Note that we deliberately ignore whether or not the cell has a layer, since these backgrounds paint "behind" the
// cell.
if (columnGroup && columnGroup->hasBackground())
tableCellPainter.paintBackgroundsBehindCell(paintInfo, cellPoint, columnGroup, DisplayItem::TableCellBackgroundFromColumnGroup);
if (column && column->hasBackground())
tableCellPainter.paintBackgroundsBehindCell(paintInfo, cellPoint, column, DisplayItem::TableCellBackgroundFromColumn);
// Paint the row group next.
if (m_layoutTableSection.hasBackground())
tableCellPainter.paintBackgroundsBehindCell(paintInfo, cellPoint, &m_layoutTableSection, DisplayItem::TableCellBackgroundFromSection);
// Paint the row next, but only if it doesn't have a layer. If a row has a layer, it will be responsible for
// painting the row background for the cell.
if (row->hasBackground() && !row->hasSelfPaintingLayer())
tableCellPainter.paintBackgroundsBehindCell(paintInfo, cellPoint, row, DisplayItem::TableCellBackgroundFromRow);
}
if ((!cell.hasSelfPaintingLayer() && !row->hasSelfPaintingLayer()))
cell.paint(paintInfo, cellPoint);
}
void AXTableCell::columnIndexRange(std::pair<unsigned, unsigned>& columnRange)
{
if (!m_layoutObject || !m_layoutObject->isTableCell())
return;
LayoutTableCell* cell = toLayoutTableCell(m_layoutObject);
columnRange.first = cell->table()->colToEffCol(cell->col());
columnRange.second = cell->table()->colToEffCol(cell->col() + cell->colSpan()) - columnRange.first;
}
bool AXTable::isDataTable() const
{
if (!m_layoutObject || !node())
return false;
// Do not consider it a data table if it has an ARIA role.
if (hasARIARole())
return false;
// When a section of the document is contentEditable, all tables should be
// treated as data tables, otherwise users may not be able to work with rich
// text editors that allow creating and editing tables.
if (node() && node()->hasEditableStyle())
return true;
// This employs a heuristic to determine if this table should appear.
// Only "data" tables should be exposed as tables.
// Unfortunately, there is no good way to determine the difference
// between a "layout" table and a "data" table.
LayoutTable* table = toLayoutTable(m_layoutObject);
Node* tableNode = table->node();
if (!isHTMLTableElement(tableNode))
return false;
// Do not consider it a data table if any of its descendants have an ARIA role.
HTMLTableElement* tableElement = toHTMLTableElement(tableNode);
if (elementHasAriaRole(tableElement->tHead()))
return false;
if (elementHasAriaRole(tableElement->tFoot()))
return false;
RefPtrWillBeRawPtr<HTMLCollection> bodies = tableElement->tBodies();
for (unsigned bodyIndex = 0; bodyIndex < bodies->length(); ++bodyIndex) {
Element* bodyElement = bodies->item(bodyIndex);
if (elementHasAriaRole(bodyElement))
return false;
}
RefPtrWillBeRawPtr<HTMLTableRowsCollection> rows = tableElement->rows();
unsigned rowCount = rows->length();
for (unsigned rowIndex = 0; rowIndex < rowCount; ++rowIndex) {
HTMLTableRowElement* rowElement = rows->item(rowIndex);
if (elementHasAriaRole(rowElement))
return false;
RefPtrWillBeRawPtr<HTMLCollection> cells = rowElement->cells();
for (unsigned cellIndex = 0; cellIndex < cells->length(); ++cellIndex) {
if (elementHasAriaRole(cells->item(cellIndex)))
return false;
}
}
// If there is a caption element, summary, THEAD, or TFOOT section, it's most certainly a data table
if (!tableElement->summary().isEmpty() || tableElement->tHead() || tableElement->tFoot() || tableElement->caption())
return true;
// if someone used "rules" attribute than the table should appear
if (!tableElement->rules().isEmpty())
return true;
// if there's a colgroup or col element, it's probably a data table.
if (Traversal<HTMLTableColElement>::firstChild(*tableElement))
return true;
// go through the cell's and check for tell-tale signs of "data" table status
// cells have borders, or use attributes like headers, abbr, scope or axis
table->recalcSectionsIfNeeded();
LayoutTableSection* firstBody = table->firstBody();
if (!firstBody)
return false;
int numCols = firstBody->numEffectiveColumns();
int numRows = firstBody->numRows();
// If there's only one cell, it's not a good AXTable candidate.
if (numRows == 1 && numCols == 1)
return false;
// If there are at least 20 rows, we'll call it a data table.
if (numRows >= 20)
return true;
// Store the background color of the table to check against cell's background colors.
const ComputedStyle* tableStyle = table->style();
if (!tableStyle)
return false;
Color tableBGColor = tableStyle->visitedDependentColor(CSSPropertyBackgroundColor);
// check enough of the cells to find if the table matches our criteria
// Criteria:
// 1) must have at least one valid cell (and)
// 2) at least half of cells have borders (or)
// 3) at least half of cells have different bg colors than the table, and there is cell spacing
unsigned validCellCount = 0;
unsigned borderedCellCount = 0;
unsigned backgroundDifferenceCellCount = 0;
unsigned cellsWithTopBorder = 0;
unsigned cellsWithBottomBorder = 0;
unsigned cellsWithLeftBorder = 0;
unsigned cellsWithRightBorder = 0;
Color alternatingRowColors[5];
int alternatingRowColorCount = 0;
int headersInFirstColumnCount = 0;
for (int row = 0; row < numRows; ++row) {
int headersInFirstRowCount = 0;
for (int col = 0; col < numCols; ++col) {
LayoutTableCell* cell = firstBody->primaryCellAt(row, col);
if (!cell)
continue;
Node* cellNode = cell->node();
if (!cellNode)
continue;
if (cell->size().width() < 1 || cell->size().height() < 1)
continue;
validCellCount++;
bool isTHCell = cellNode->hasTagName(thTag);
// If the first row is comprised of all <th> tags, assume it is a data table.
if (!row && isTHCell)
headersInFirstRowCount++;
// If the first column is comprised of all <th> tags, assume it is a data table.
if (!col && isTHCell)
headersInFirstColumnCount++;
// in this case, the developer explicitly assigned a "data" table attribute
if (isHTMLTableCellElement(*cellNode)) {
HTMLTableCellElement& cellElement = toHTMLTableCellElement(*cellNode);
if (!cellElement.headers().isEmpty() || !cellElement.abbr().isEmpty()
|| !cellElement.axis().isEmpty() || !cellElement.scope().isEmpty())
return true;
}
const ComputedStyle* computedStyle = cell->style();
if (!computedStyle)
continue;
// If the empty-cells style is set, we'll call it a data table.
if (computedStyle->emptyCells() == HIDE)
return true;
// If a cell has matching bordered sides, call it a (fully) bordered cell.
if ((cell->borderTop() > 0 && cell->borderBottom() > 0)
|| (cell->borderLeft() > 0 && cell->borderRight() > 0))
borderedCellCount++;
// Also keep track of each individual border, so we can catch tables where most
// cells have a bottom border, for example.
if (cell->borderTop() > 0)
cellsWithTopBorder++;
if (cell->borderBottom() > 0)
cellsWithBottomBorder++;
if (cell->borderLeft() > 0)
cellsWithLeftBorder++;
if (cell->borderRight() > 0)
cellsWithRightBorder++;
// If the cell has a different color from the table and there is cell spacing,
// then it is probably a data table cell (spacing and colors take the place of borders).
Color cellColor = computedStyle->visitedDependentColor(CSSPropertyBackgroundColor);
if (table->hBorderSpacing() > 0 && table->vBorderSpacing() > 0
&& tableBGColor != cellColor && cellColor.alpha() != 1)
backgroundDifferenceCellCount++;
// If we've found 10 "good" cells, we don't need to keep searching.
if (borderedCellCount >= 10 || backgroundDifferenceCellCount >= 10)
return true;
// For the first 5 rows, cache the background color so we can check if this table has zebra-striped rows.
if (row < 5 && row == alternatingRowColorCount) {
LayoutObject* layoutRow = cell->parent();
if (!layoutRow || !layoutRow->isBoxModelObject() || !toLayoutBoxModelObject(layoutRow)->isTableRow())
continue;
const ComputedStyle* rowComputedStyle = layoutRow->style();
if (!rowComputedStyle)
continue;
Color rowColor = rowComputedStyle->visitedDependentColor(CSSPropertyBackgroundColor);
alternatingRowColors[alternatingRowColorCount] = rowColor;
alternatingRowColorCount++;
}
}
if (!row && headersInFirstRowCount == numCols && numCols > 1)
return true;
}
if (headersInFirstColumnCount == numRows && numRows > 1)
return true;
// if there is less than two valid cells, it's not a data table
if (validCellCount <= 1)
return false;
// half of the cells had borders, it's a data table
unsigned neededCellCount = validCellCount / 2;
if (borderedCellCount >= neededCellCount
|| cellsWithTopBorder >= neededCellCount
|| cellsWithBottomBorder >= neededCellCount
|| cellsWithLeftBorder >= neededCellCount
|| cellsWithRightBorder >= neededCellCount)
return true;
// half had different background colors, it's a data table
if (backgroundDifferenceCellCount >= neededCellCount)
return true;
// Check if there is an alternating row background color indicating a zebra striped style pattern.
if (alternatingRowColorCount > 2) {
Color firstColor = alternatingRowColors[0];
for (int k = 1; k < alternatingRowColorCount; k++) {
// If an odd row was the same color as the first row, its not alternating.
if (k % 2 == 1 && alternatingRowColors[k] == firstColor)
return false;
// If an even row is not the same as the first row, its not alternating.
if (!(k % 2) && alternatingRowColors[k] != firstColor)
return false;
}
return true;
}
return false;
}
void LayoutTableRow::computeOverflow() {
clearAllOverflows();
addVisualEffectOverflow();
for (LayoutTableCell* cell = firstCell(); cell; cell = cell->nextCell())
addOverflowFromCell(cell);
}
void LayoutTableRow::addChild(LayoutObject* child, LayoutObject* beforeChild) {
if (!child->isTableCell()) {
LayoutObject* last = beforeChild;
if (!last)
last = lastCell();
if (last && last->isAnonymous() && last->isTableCell() &&
!last->isBeforeOrAfterContent()) {
LayoutTableCell* lastCell = toLayoutTableCell(last);
if (beforeChild == lastCell)
beforeChild = lastCell->firstChild();
lastCell->addChild(child, beforeChild);
return;
}
if (beforeChild && !beforeChild->isAnonymous() &&
beforeChild->parent() == this) {
LayoutObject* cell = beforeChild->previousSibling();
if (cell && cell->isTableCell() && cell->isAnonymous()) {
cell->addChild(child);
return;
}
}
// If beforeChild is inside an anonymous cell, insert into the cell.
if (last && !last->isTableCell() && last->parent() &&
last->parent()->isAnonymous() &&
!last->parent()->isBeforeOrAfterContent()) {
last->parent()->addChild(child, beforeChild);
return;
}
LayoutTableCell* cell = LayoutTableCell::createAnonymousWithParent(this);
addChild(cell, beforeChild);
cell->addChild(child);
return;
}
if (beforeChild && beforeChild->parent() != this)
beforeChild = splitAnonymousBoxesAroundChild(beforeChild);
LayoutTableCell* cell = toLayoutTableCell(child);
ASSERT(!beforeChild || beforeChild->isTableCell());
LayoutTableBoxComponent::addChild(cell, beforeChild);
// Generated content can result in us having a null section so make sure to
// null check our parent.
if (parent()) {
section()->addCell(cell, this);
// When borders collapse, adding a cell can affect the the width of
// neighboring cells.
LayoutTable* enclosingTable = table();
if (enclosingTable && enclosingTable->collapseBorders()) {
if (LayoutTableCell* previousCell = cell->previousCell())
previousCell->setNeedsLayoutAndPrefWidthsRecalc(
LayoutInvalidationReason::TableChanged);
if (LayoutTableCell* nextCell = cell->nextCell())
nextCell->setNeedsLayoutAndPrefWidthsRecalc(
LayoutInvalidationReason::TableChanged);
}
}
if (beforeChild || nextRow())
section()->setNeedsCellRecalc();
}
int TableLayoutAlgorithmFixed::calcWidthArray()
{
// FIXME: We might want to wait until we have all of the first row before computing for the first time.
int usedWidth = 0;
// iterate over all <col> elements
unsigned nEffCols = m_table->numEffectiveColumns();
m_width.resize(nEffCols);
m_width.fill(Length(Auto));
unsigned currentEffectiveColumn = 0;
for (LayoutTableCol* col = m_table->firstColumn(); col; col = col->nextColumn()) {
// LayoutTableCols don't have the concept of preferred logical width, but we need to clear their dirty bits
// so that if we call setPreferredWidthsDirty(true) on a col or one of its descendants, we'll mark it's
// ancestors as dirty.
col->clearPreferredLogicalWidthsDirtyBits();
// Width specified by column-groups that have column child does not affect column width in fixed layout tables
if (col->isTableColumnGroupWithColumnChildren())
continue;
Length colStyleLogicalWidth = col->style()->logicalWidth();
int effectiveColWidth = 0;
if (colStyleLogicalWidth.isFixed() && colStyleLogicalWidth.value() > 0)
effectiveColWidth = colStyleLogicalWidth.value();
unsigned span = col->span();
while (span) {
unsigned spanInCurrentEffectiveColumn;
if (currentEffectiveColumn >= nEffCols) {
m_table->appendEffectiveColumn(span);
nEffCols++;
m_width.append(Length());
spanInCurrentEffectiveColumn = span;
} else {
if (span < m_table->spanOfEffectiveColumn(currentEffectiveColumn)) {
m_table->splitEffectiveColumn(currentEffectiveColumn, span);
nEffCols++;
m_width.append(Length());
}
spanInCurrentEffectiveColumn = m_table->spanOfEffectiveColumn(currentEffectiveColumn);
}
// TODO(alancutter): Make this work correctly for calc lengths.
if ((colStyleLogicalWidth.isFixed() || colStyleLogicalWidth.hasPercent()) && colStyleLogicalWidth.isPositive()) {
m_width[currentEffectiveColumn] = colStyleLogicalWidth;
m_width[currentEffectiveColumn] *= spanInCurrentEffectiveColumn;
usedWidth += effectiveColWidth * spanInCurrentEffectiveColumn;
}
span -= spanInCurrentEffectiveColumn;
currentEffectiveColumn++;
}
}
// Iterate over the first row in case some are unspecified.
LayoutTableSection* section = m_table->topNonEmptySection();
if (!section)
return usedWidth;
unsigned currentColumn = 0;
LayoutTableRow* firstRow = section->firstRow();
for (LayoutTableCell* cell = firstRow->firstCell(); cell; cell = cell->nextCell()) {
Length logicalWidth = cell->styleOrColLogicalWidth();
// FIXME: calc() on tables should be handled consistently with other lengths. See bug: https://crbug.com/382725
if (logicalWidth.isCalculated())
logicalWidth = Length(); // Make it Auto
unsigned span = cell->colSpan();
int fixedBorderBoxLogicalWidth = 0;
// FIXME: Support other length types. If the width is non-auto, it should probably just use
// LayoutBox::computeLogicalWidthUsing to compute the width.
if (logicalWidth.isFixed() && logicalWidth.isPositive()) {
fixedBorderBoxLogicalWidth = cell->adjustBorderBoxLogicalWidthForBoxSizing(logicalWidth.value());
logicalWidth.setValue(fixedBorderBoxLogicalWidth);
}
unsigned usedSpan = 0;
while (usedSpan < span && currentColumn < nEffCols) {
float eSpan = m_table->spanOfEffectiveColumn(currentColumn);
// Only set if no col element has already set it.
if (m_width[currentColumn].isAuto() && logicalWidth.type() != Auto) {
m_width[currentColumn] = logicalWidth;
m_width[currentColumn] *= eSpan / span;
usedWidth += fixedBorderBoxLogicalWidth * eSpan / span;
}
usedSpan += eSpan;
++currentColumn;
}
// TableLayoutAlgorithmFixed doesn't use min/maxPreferredLogicalWidths, but we need to clear the
// dirty bit on the cell so that we'll correctly mark its ancestors dirty
// in case we later call setPreferredLogicalWidthsDirty() on it later.
if (cell->preferredLogicalWidthsDirty())
cell->clearPreferredLogicalWidthsDirty();
}
return usedWidth;
}