C++ nsDisplayListSet::BlockBorderBackgrounds方法代码示例

void
nsGridContainerFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                       const nsRect&           aDirtyRect,
                                       const nsDisplayListSet& aLists)
{
  DisplayBorderBackgroundOutline(aBuilder, aLists);

  // Our children are all grid-level boxes, which behave the same as
  // inline-blocks in painting, so their borders/backgrounds all go on
  // the BlockBorderBackgrounds list.
  // Also, we capture positioned descendants so we can sort them by
  // CSS 'order'.
  nsDisplayList positionedDescendants;
  nsDisplayListSet childLists(aLists.BlockBorderBackgrounds(),
                              aLists.BlockBorderBackgrounds(),
                              aLists.Floats(),
                              aLists.Content(),
                              &positionedDescendants,
                              aLists.Outlines());
  typedef GridItemCSSOrderIterator::OrderState OrderState;
  OrderState order = mIsNormalFlowInCSSOrder ? OrderState::eKnownOrdered
                                             : OrderState::eKnownUnordered;
  GridItemCSSOrderIterator iter(this, kPrincipalList, order);
  for (; !iter.AtEnd(); iter.Next()) {
    nsIFrame* child = *iter;
    BuildDisplayListForChild(aBuilder, child, aDirtyRect, childLists,
                             ::GetDisplayFlagsForGridItem(child));
  }
  positionedDescendants.SortByCSSOrder(aBuilder);
  aLists.PositionedDescendants()->AppendToTop(&positionedDescendants);
}

nsresult nsDisplayWrapper::WrapLists(nsDisplayListBuilder* aBuilder,
    nsIFrame* aFrame, const nsDisplayListSet& aIn, const nsDisplayListSet& aOut)
{
  nsresult rv = WrapListsInPlace(aBuilder, aFrame, aIn);
  NS_ENSURE_SUCCESS(rv, rv);

  if (&aOut == &aIn)
    return NS_OK;
  aOut.BorderBackground()->AppendToTop(aIn.BorderBackground());
  aOut.BlockBorderBackgrounds()->AppendToTop(aIn.BlockBorderBackgrounds());
  aOut.Floats()->AppendToTop(aIn.Floats());
  aOut.Content()->AppendToTop(aIn.Content());
  aOut.PositionedDescendants()->AppendToTop(aIn.PositionedDescendants());
  aOut.Outlines()->AppendToTop(aIn.Outlines());
  return NS_OK;
}

void nsDisplayListSet::MoveTo(const nsDisplayListSet& aDestination) const
{
  aDestination.BorderBackground()->AppendToTop(BorderBackground());
  aDestination.BlockBorderBackgrounds()->AppendToTop(BlockBorderBackgrounds());
  aDestination.Floats()->AppendToTop(Floats());
  aDestination.Content()->AppendToTop(Content());
  aDestination.PositionedDescendants()->AppendToTop(PositionedDescendants());
  aDestination.Outlines()->AppendToTop(Outlines());
}

void
nsFieldSetFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                  const nsRect&           aDirtyRect,
                                  const nsDisplayListSet& aLists) {
  // Paint our background and border in a special way.
  // REVIEW: We don't really need to check frame emptiness here; if it's empty,
  // the background/border display item won't do anything, and if it isn't empty,
  // we need to paint the outline
  if (!(GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) &&
      IsVisibleForPainting(aBuilder)) {
    if (StyleEffects()->mBoxShadow) {
      aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
        nsDisplayBoxShadowOuter(aBuilder, this));
    }

    nsDisplayBackgroundImage::AppendBackgroundItemsToTop(
      aBuilder, this, VisualBorderRectRelativeToSelf(),
      aLists.BorderBackground(),
      /* aAllowWillPaintBorderOptimization = */ false);

    aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
      nsDisplayFieldSetBorderBackground(aBuilder, this));
  
    DisplayOutlineUnconditional(aBuilder, aLists);

    DO_GLOBAL_REFLOW_COUNT_DSP("nsFieldSetFrame");
  }

  if (GetPrevInFlow()) {
    DisplayOverflowContainers(aBuilder, aDirtyRect, aLists);
  }

  nsDisplayListCollection contentDisplayItems;
  if (nsIFrame* inner = GetInner()) {
    // Collect the inner frame's display items into their own collection.
    // We need to be calling BuildDisplayList on it before the legend in
    // case it contains out-of-flow frames whose placeholders are in the
    // legend. However, we want the inner frame's display items to be
    // after the legend's display items in z-order, so we need to save them
    // and append them later.
    BuildDisplayListForChild(aBuilder, inner, aDirtyRect, contentDisplayItems);
  }
  if (nsIFrame* legend = GetLegend()) {
    // The legend's background goes on our BlockBorderBackgrounds list because
    // it's a block child.
    nsDisplayListSet set(aLists, aLists.BlockBorderBackgrounds());
    BuildDisplayListForChild(aBuilder, legend, aDirtyRect, set);
  }
  // Put the inner frame's display items on the master list. Note that this
  // moves its border/background display items to our BorderBackground() list,
  // which isn't really correct, but it's OK because the inner frame is
  // anonymous and can't have its own border and background.
  contentDisplayItems.MoveTo(aLists);
}

void
nsDeckFrame::BuildDisplayListForChildren(nsDisplayListBuilder*   aBuilder,
                                         const nsRect&           aDirtyRect,
                                         const nsDisplayListSet& aLists)
{
  // only paint the selected box
  nsIFrame* box = GetSelectedBox();
  if (!box)
    return;

  // Putting the child in the background list. This is a little weird but
  // it matches what we were doing before.
  nsDisplayListSet set(aLists, aLists.BlockBorderBackgrounds());
  BuildDisplayListForChild(aBuilder, box, aDirtyRect, set);
}

void
nsFrame::PrintDisplayListSet(nsDisplayListBuilder* aBuilder,
                             const nsDisplayListSet& aSet,
                             std::stringstream& aStream,
                             bool aDumpHtml)
{
  if (aDumpHtml) {
    aStream << "<ul>";
  }
  PrintDisplayListSetItem(aBuilder, "[BorderBackground]", *(aSet.BorderBackground()), aStream, aDumpHtml);
  PrintDisplayListSetItem(aBuilder, "[BlockBorderBackgrounds]", *(aSet.BlockBorderBackgrounds()), aStream, aDumpHtml);
  PrintDisplayListSetItem(aBuilder, "[Floats]", *(aSet.Floats()), aStream, aDumpHtml);
  PrintDisplayListSetItem(aBuilder, "[PositionedDescendants]", *(aSet.PositionedDescendants()), aStream, aDumpHtml);
  PrintDisplayListSetItem(aBuilder, "[Outlines]", *(aSet.Outlines()), aStream, aDumpHtml);
  PrintDisplayListSetItem(aBuilder, "[Content]", *(aSet.Content()), aStream, aDumpHtml);
  if (aDumpHtml) {
    aStream << "</ul>";
  }
}

nsresult nsDisplayWrapper::WrapListsInPlace(nsDisplayListBuilder* aBuilder,
    nsIFrame* aFrame, const nsDisplayListSet& aLists)
{
  nsresult rv;
  if (WrapBorderBackground()) {
    // Our border-backgrounds are in-flow
    rv = WrapDisplayList(aBuilder, aFrame, aLists.BorderBackground(), this);
    NS_ENSURE_SUCCESS(rv, rv);
  }
  // Our block border-backgrounds are in-flow
  rv = WrapDisplayList(aBuilder, aFrame, aLists.BlockBorderBackgrounds(), this);
  NS_ENSURE_SUCCESS(rv, rv);
  // The floats are not in flow
  rv = WrapEachDisplayItem(aBuilder, aLists.Floats(), this);
  NS_ENSURE_SUCCESS(rv, rv);
  // Our child content is in flow
  rv = WrapDisplayList(aBuilder, aFrame, aLists.Content(), this);
  NS_ENSURE_SUCCESS(rv, rv);
  // The positioned descendants may not be in-flow
  rv = WrapEachDisplayItem(aBuilder, aLists.PositionedDescendants(), this);
  NS_ENSURE_SUCCESS(rv, rv);
  // The outlines may not be in-flow
  return WrapEachDisplayItem(aBuilder, aLists.Outlines(), this);
}