// Calculates the available width for the table cell based on the known
// column widths taking into account column spans and column spacing
static nscoord
CalcAvailWidth(nsTableFrame& aTableFrame,
nsTableCellFrame& aCellFrame,
nscoord aCellSpacingX)
{
nscoord cellAvailWidth = 0;
PRInt32 colIndex;
aCellFrame.GetColIndex(colIndex);
PRInt32 colspan = aTableFrame.GetEffectiveColSpan(aCellFrame);
NS_ASSERTION(colspan > 0, "effective colspan should be positive");
for (PRInt32 spanX = 0; spanX < colspan; spanX++) {
cellAvailWidth += aTableFrame.GetColumnWidth(colIndex + spanX);
if (spanX > 0 &&
aTableFrame.ColumnHasCellSpacingBefore(colIndex + spanX)) {
cellAvailWidth += aCellSpacingX;
}
}
return cellAvailWidth;
}
nsresult
nsTableRowFrame::ReflowChildren(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableFrame& aTableFrame,
nsReflowStatus& aStatus)
{
aStatus = NS_FRAME_COMPLETE;
// XXXldb Should we be checking constrained height instead?
const bool isPaginated = aPresContext->IsPaginated();
const bool borderCollapse = aTableFrame.IsBorderCollapse();
nsresult rv = NS_OK;
nscoord cellSpacingX = aTableFrame.GetCellSpacingX();
PRInt32 cellColSpan = 1; // must be defined here so it's set properly for non-cell kids
nsTableIterator iter(*this);
// remember the col index of the previous cell to handle rowspans into this row
PRInt32 firstPrevColIndex = (iter.IsLeftToRight()) ? -1 : aTableFrame.GetColCount();
PRInt32 prevColIndex = firstPrevColIndex;
nscoord x = 0; // running total of children x offset
// This computes the max of all cell heights
nscoord cellMaxHeight = 0;
// Reflow each of our existing cell frames
for (nsIFrame* kidFrame = iter.First(); kidFrame; kidFrame = iter.Next()) {
nsTableCellFrame *cellFrame = do_QueryFrame(kidFrame);
if (!cellFrame) {
// XXXldb nsCSSFrameConstructor needs to enforce this!
NS_NOTREACHED("yikes, a non-row child");
// it's an unknown frame type, give it a generic reflow and ignore the results
nsTableCellReflowState kidReflowState(aPresContext, aReflowState,
kidFrame, nsSize(0,0), false);
InitChildReflowState(*aPresContext, nsSize(0,0), false, kidReflowState);
nsHTMLReflowMetrics desiredSize;
nsReflowStatus status;
ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState, 0, 0, 0, status);
kidFrame->DidReflow(aPresContext, nullptr, NS_FRAME_REFLOW_FINISHED);
continue;
}
// See if we should only reflow the dirty child frames
bool doReflowChild = true;
if (!aReflowState.ShouldReflowAllKids() &&
!aTableFrame.IsGeometryDirty() &&
!NS_SUBTREE_DIRTY(kidFrame)) {
if (!aReflowState.mFlags.mSpecialHeightReflow)
doReflowChild = false;
}
else if ((NS_UNCONSTRAINEDSIZE != aReflowState.availableHeight)) {
// We don't reflow a rowspan >1 cell here with a constrained height.
// That happens in nsTableRowGroupFrame::SplitSpanningCells.
if (aTableFrame.GetEffectiveRowSpan(*cellFrame) > 1) {
doReflowChild = false;
}
}
if (aReflowState.mFlags.mSpecialHeightReflow) {
if (!isPaginated && !(cellFrame->GetStateBits() &
NS_FRAME_CONTAINS_RELATIVE_HEIGHT)) {
continue;
}
}
PRInt32 cellColIndex;
cellFrame->GetColIndex(cellColIndex);
cellColSpan = aTableFrame.GetEffectiveColSpan(*cellFrame);
// If the adjacent cell is in a prior row (because of a rowspan) add in the space
if ((iter.IsLeftToRight() && (prevColIndex != (cellColIndex - 1))) ||
(!iter.IsLeftToRight() && (prevColIndex != cellColIndex + cellColSpan))) {
x += GetSpaceBetween(prevColIndex, cellColIndex, cellColSpan, aTableFrame,
cellSpacingX, iter.IsLeftToRight(), false);
}
// remember the rightmost (ltr) or leftmost (rtl) column this cell spans into
prevColIndex = (iter.IsLeftToRight()) ? cellColIndex + (cellColSpan - 1) : cellColIndex;
// Reflow the child frame
nsRect kidRect = kidFrame->GetRect();
nsRect kidVisualOverflow = kidFrame->GetVisualOverflowRect();
bool firstReflow =
(kidFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW) != 0;
if (doReflowChild) {
// Calculate the available width for the table cell using the known column widths
nscoord availCellWidth =
CalcAvailWidth(aTableFrame, *cellFrame, cellSpacingX);
nsHTMLReflowMetrics desiredSize;
// If the avail width is not the same as last time we reflowed the cell or
// the cell wants to be bigger than what was available last time or
// it is a style change reflow or we are printing, then we must reflow the
// cell. Otherwise we can skip the reflow.
// XXXldb Why is this condition distinct from doReflowChild above?
nsSize cellDesiredSize = cellFrame->GetDesiredSize();
if ((availCellWidth != cellFrame->GetPriorAvailWidth()) ||
(cellDesiredSize.width > cellFrame->GetPriorAvailWidth()) ||
(GetStateBits() & NS_FRAME_IS_DIRTY) ||
isPaginated ||
NS_SUBTREE_DIRTY(cellFrame) ||
// See if it needs a special reflow, or if it had one that we need to undo.
(cellFrame->GetStateBits() & NS_FRAME_CONTAINS_RELATIVE_HEIGHT) ||
HasPctHeight()) {
// Reflow the cell to fit the available width, height
// XXX The old IR_ChildIsDirty code used availCellWidth here.
nsSize kidAvailSize(availCellWidth, aReflowState.availableHeight);
// Reflow the child
nsTableCellReflowState kidReflowState(aPresContext, aReflowState,
kidFrame, kidAvailSize, false);
InitChildReflowState(*aPresContext, kidAvailSize, borderCollapse,
kidReflowState);
nsReflowStatus status;
rv = ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState,
x, 0, NS_FRAME_INVALIDATE_ON_MOVE, status);
// allow the table to determine if/how the table needs to be rebalanced
// If any of the cells are not complete, then we're not complete
if (NS_FRAME_IS_NOT_COMPLETE(status)) {
aStatus = NS_FRAME_NOT_COMPLETE;
}
}
else {
if (x != kidRect.x) {
kidFrame->InvalidateFrameSubtree();
}
desiredSize.width = cellDesiredSize.width;
desiredSize.height = cellDesiredSize.height;
desiredSize.mOverflowAreas = cellFrame->GetOverflowAreas();
// if we are in a floated table, our position is not yet established, so we cannot reposition our views
// the containing block will do this for us after positioning the table
if (!aTableFrame.IsFloating()) {
// Because we may have moved the frame we need to make sure any views are
// positioned properly. We have to do this, because any one of our parent
// frames could have moved and we have no way of knowing...
nsTableFrame::RePositionViews(kidFrame);
}
}
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableHeight) {
if (!GetPrevInFlow()) {
// Calculate the cell's actual height given its pass2 height. This
// function takes into account the specified height (in the style)
CalculateCellActualHeight(cellFrame, desiredSize.height);
}
// height may have changed, adjust descent to absorb any excess difference
nscoord ascent;
if (!kidFrame->GetFirstPrincipalChild()->GetFirstPrincipalChild())
ascent = desiredSize.height;
else
ascent = ((nsTableCellFrame *)kidFrame)->GetCellBaseline();
nscoord descent = desiredSize.height - ascent;
UpdateHeight(desiredSize.height, ascent, descent, &aTableFrame, cellFrame);
}
else {
cellMaxHeight = NS_MAX(cellMaxHeight, desiredSize.height);
PRInt32 rowSpan = aTableFrame.GetEffectiveRowSpan((nsTableCellFrame&)*kidFrame);
if (1 == rowSpan) {
SetContentHeight(cellMaxHeight);
}
}
// Place the child
desiredSize.width = availCellWidth;
FinishReflowChild(kidFrame, aPresContext, nullptr, desiredSize, x, 0, 0);
nsTableFrame::InvalidateFrame(kidFrame, kidRect, kidVisualOverflow,
firstReflow);
x += desiredSize.width;
}
else {
if (kidRect.x != x) {
// Invalidate the old position
kidFrame->InvalidateFrameSubtree();
// move to the new position
kidFrame->SetPosition(nsPoint(x, kidRect.y));
nsTableFrame::RePositionViews(kidFrame);
// invalidate the new position
kidFrame->InvalidateFrameSubtree();
}
// we need to account for the cell's width even if it isn't reflowed
x += kidRect.width;
if (kidFrame->GetNextInFlow()) {
aStatus = NS_FRAME_NOT_COMPLETE;
}
}
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, kidFrame);
x += cellSpacingX;
}
// just set our width to what was available. The table will calculate the width and not use our value.
aDesiredSize.width = aReflowState.availableWidth;
if (aReflowState.mFlags.mSpecialHeightReflow) {
aDesiredSize.height = mRect.height;
}
else if (NS_UNCONSTRAINEDSIZE == aReflowState.availableHeight) {
aDesiredSize.height = CalcHeight(aReflowState);
if (GetPrevInFlow()) {
nscoord height = CalcHeightFromUnpaginatedHeight(aPresContext, *this);
aDesiredSize.height = NS_MAX(aDesiredSize.height, height);
}
else {
if (isPaginated && HasStyleHeight()) {
// set the unpaginated height so next in flows can try to honor it
SetHasUnpaginatedHeight(true);
SetUnpaginatedHeight(aPresContext, aDesiredSize.height);
}
if (isPaginated && HasUnpaginatedHeight()) {
aDesiredSize.height = NS_MAX(aDesiredSize.height, GetUnpaginatedHeight(aPresContext));
}
}
}
else { // constrained height, paginated
// Compute the height we should have from style (subtracting the
// height from our prev-in-flows from the style height)
nscoord styleHeight = CalcHeightFromUnpaginatedHeight(aPresContext, *this);
if (styleHeight > aReflowState.availableHeight) {
styleHeight = aReflowState.availableHeight;
NS_FRAME_SET_INCOMPLETE(aStatus);
}
aDesiredSize.height = NS_MAX(cellMaxHeight, styleHeight);
}
aDesiredSize.UnionOverflowAreasWithDesiredBounds();
FinishAndStoreOverflow(&aDesiredSize);
return rv;
}