C++ nsTableFrame::GetColCount方法代码示例

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())       ||
//.........这里部分代码省略.........