C++ nsDisplayListSet::Outlines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
nsSliderFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                const nsDisplayListSet& aLists)
{
  if (aBuilder->IsForEventDelivery() && isDraggingThumb()) {
    // This is EVIL, we shouldn't be messing with event delivery just to get
    // thumb mouse drag events to arrive at the slider!
    aLists.Outlines()->AppendToTop(new (aBuilder)
      nsDisplayEventReceiver(aBuilder, this));
    return;
  }

  nsBoxFrame::BuildDisplayList(aBuilder, aLists);
}

void
nsPlaceholderFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                     const nsRect&           aDirtyRect,
                                     const nsDisplayListSet& aLists)
{
  DO_GLOBAL_REFLOW_COUNT_DSP("nsPlaceholderFrame");
  
#ifdef DEBUG
  if (GetShowFrameBorders()) {
    aLists.Outlines()->AppendNewToTop(
      new (aBuilder) nsDisplayGeneric(aBuilder, this, PaintDebugPlaceholder,
                                      "DebugPlaceholder",
                                      nsDisplayItem::TYPE_DEBUG_PLACEHOLDER));
  }
#endif
}

void
nsSplitterFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                  const nsRect&           aDirtyRect,
                                  const nsDisplayListSet& aLists)
{
  nsBoxFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
  
  // if the mouse is captured always return us as the frame.
  if (mInner->mDragging)
  {
    // XXX It's probably better not to check visibility here, right?
    aLists.Outlines()->AppendNewToTop(new (aBuilder)
      nsDisplayEventReceiver(aBuilder, this));
    return;
  }
}

void
nsSelectsAreaFrame::BuildDisplayListInternal(nsDisplayListBuilder*   aBuilder,
                                             const nsRect&           aDirtyRect,
                                             const nsDisplayListSet& aLists)
{
  nsBlockFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);

  nsListControlFrame* listFrame = GetEnclosingListFrame(this);
  if (listFrame && listFrame->IsFocused()) {
    // we can't just associate the display item with the list frame,
    // because then the list's scrollframe won't clip it (the scrollframe
    // only clips contained descendants).
    aLists.Outlines()->AppendNewToTop(new (aBuilder)
      nsDisplayListFocus(aBuilder, this));
  }
}

NS_IMETHODIMP
nsPlaceholderFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                     const nsRect&           aDirtyRect,
                                     const nsDisplayListSet& aLists)
{
  DO_GLOBAL_REFLOW_COUNT_DSP("nsPlaceholderFrame");
  
#ifdef DEBUG
  if (!GetShowFrameBorders())
    return NS_OK;
  
  return aLists.Outlines()->AppendNewToTop(new (aBuilder)
      nsDisplayGeneric(this, PaintDebugPlaceholder, "DebugPlaceholder"));
#else // DEBUG
  return NS_OK;
#endif // DEBUG
}

NS_IMETHODIMP
nsSplitterFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                  const nsRect&           aDirtyRect,
                                  const nsDisplayListSet& aLists)
{
  nsresult rv = nsBoxFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
  NS_ENSURE_SUCCESS(rv, rv);
  
  // if the mouse is captured always return us as the frame.
  if (mInner->mDragging)
  {
    // XXX It's probably better not to check visibility here, right?
    return aLists.Outlines()->AppendNewToTop(new (aBuilder)
        nsDisplayEventReceiver(aBuilder, this));
  }

  return NS_OK;
}

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);
}

//.........这里部分代码省略.........
  // and the code in nsFrame::DisplayBorderBackgroundOutline might not give us
  // a background.
  // We don't have any border or outline, and our background draws over
  // the overflow area, so just add nsDisplayCanvasBackground instead of
  // calling DisplayBorderBackgroundOutline.
  if (IsVisibleForPainting(aBuilder)) {
    nsStyleContext* bgSC;
    const nsStyleBackground* bg = nullptr;
    bool isThemed = IsThemed();
    if (!isThemed && nsCSSRendering::FindBackground(this, &bgSC)) {
      bg = bgSC->StyleBackground();
    }
    aLists.BorderBackground()->AppendNewToTop(
        new (aBuilder) nsDisplayCanvasBackgroundColor(aBuilder, this));
  
    if (isThemed) {
      aLists.BorderBackground()->AppendNewToTop(
        new (aBuilder) nsDisplayCanvasThemedBackground(aBuilder, this));
      return;
    }

    if (!bg) {
      return;
    }

    const DisplayItemScrollClip* scrollClip =
      aBuilder->ClipState().GetCurrentInnermostScrollClip();

    bool needBlendContainer = false;

    // Create separate items for each background layer.
    const nsStyleImageLayers& layers = bg->mImage;
    NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT(i, layers) {
      if (layers.mLayers[i].mImage.IsEmpty()) {
        continue;
      }
      if (layers.mLayers[i].mBlendMode != NS_STYLE_BLEND_NORMAL) {
        needBlendContainer = true;
      }

      nsDisplayList thisItemList;
      nsDisplayCanvasBackgroundImage* bgItem =
        new (aBuilder) nsDisplayCanvasBackgroundImage(aBuilder, this, i, bg);
      if (bgItem->ShouldFixToViewport(aBuilder)) {
        thisItemList.AppendNewToTop(
          nsDisplayFixedPosition::CreateForFixedBackground(aBuilder, this, bgItem, i));
      } else {
        thisItemList.AppendNewToTop(bgItem);
      }

      if (layers.mLayers[i].mBlendMode != NS_STYLE_BLEND_NORMAL) {
        thisItemList.AppendNewToTop(
          new (aBuilder) nsDisplayBlendMode(aBuilder, this, &thisItemList,
                                            layers.mLayers[i].mBlendMode,
                                            scrollClip, i + 1));
      }
      aLists.BorderBackground()->AppendToTop(&thisItemList);
    }

    if (needBlendContainer) {
      aLists.BorderBackground()->AppendNewToTop(
        nsDisplayBlendContainer::CreateForBackgroundBlendMode(aBuilder, this,
                                                              aLists.BorderBackground(),
                                                              scrollClip));
    }
  }

  for (nsIFrame* kid : PrincipalChildList()) {
    // Put our child into its own pseudo-stack.
    BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists);
  }

#ifdef DEBUG_CANVAS_FOCUS
  nsCOMPtr<nsIContent> focusContent;
  aPresContext->EventStateManager()->
    GetFocusedContent(getter_AddRefs(focusContent));

  bool hasFocus = false;
  nsCOMPtr<nsISupports> container;
  aPresContext->GetContainer(getter_AddRefs(container));
  nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
  if (docShell) {
    docShell->GetHasFocus(&hasFocus);
    printf("%p - nsCanvasFrame::Paint R:%d,%d,%d,%d  DR: %d,%d,%d,%d\n", this, 
            mRect.x, mRect.y, mRect.width, mRect.height,
            aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height);
  }
  printf("%p - Focus: %s   c: %p  DoPaint:%s\n", docShell.get(), hasFocus?"Y":"N", 
         focusContent.get(), mDoPaintFocus?"Y":"N");
#endif

  if (!mDoPaintFocus)
    return;
  // Only paint the focus if we're visible
  if (!StyleVisibility()->IsVisible())
    return;
  
  aLists.Outlines()->AppendNewToTop(new (aBuilder)
    nsDisplayCanvasFocus(aBuilder, this));
}