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;
}
// 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 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();
}
