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

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);
}

NS_IMETHODIMP
nsCanvasFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                const nsRect&           aDirtyRect,
                                const nsDisplayListSet& aLists)
{
  nsresult rv;

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

  // Force a background to be shown. We may have a background propagated to us,
  // in which case GetStyleBackground wouldn't have the right background
  // 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;
    if (!IsThemed() &&
        nsCSSRendering::FindBackground(PresContext(), this, &bgSC)) {
      bg = bgSC->GetStyleBackground();
    }
    // Create separate items for each background layer.
    NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, bg) {
      rv = aLists.BorderBackground()->AppendNewToTop(
          new (aBuilder) nsDisplayCanvasBackground(aBuilder, this, i));
      NS_ENSURE_SUCCESS(rv, rv);
    }
  }

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());
}

nsresult
nsMathMLmtdFrame::ProcessBorders(nsTableFrame* aFrame,
                                 nsDisplayListBuilder* aBuilder,
                                 const nsDisplayListSet& aLists)
{
  aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
                                            nsDisplaymtdBorder(aBuilder, this));
  return NS_OK;
}

void
nsHTMLButtonControlFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                           const nsRect&           aDirtyRect,
                                           const nsDisplayListSet& aLists)
{
  // Clip to our border area for event hit testing.
  Maybe<DisplayListClipState::AutoSaveRestore> eventClipState;
  const bool isForEventDelivery = aBuilder->IsForEventDelivery();
  if (isForEventDelivery) {
    eventClipState.emplace(aBuilder);
    nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
    nscoord radii[8];
    bool hasRadii = GetBorderRadii(radii);
    eventClipState->ClipContainingBlockDescendants(rect, hasRadii ? radii : nullptr);
  }

  nsDisplayList onTop;
  if (IsVisibleForPainting(aBuilder)) {
    mRenderer.DisplayButton(aBuilder, aLists.BorderBackground(), &onTop);
  }

  nsDisplayListCollection set;

  // Do not allow the child subtree to receive events.
  if (!isForEventDelivery) {
    DisplayListClipState::AutoSaveRestore clipState(aBuilder);

    if (IsInput() || StyleDisplay()->mOverflowX != NS_STYLE_OVERFLOW_VISIBLE) {
      nsMargin border = StyleBorder()->GetComputedBorder();
      nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
      rect.Deflate(border);
      nscoord radii[8];
      bool hasRadii = GetPaddingBoxBorderRadii(radii);
      clipState.ClipContainingBlockDescendants(rect, hasRadii ? radii : nullptr);
    }

    BuildDisplayListForChild(aBuilder, mFrames.FirstChild(), aDirtyRect, set,
                             DISPLAY_CHILD_FORCE_PSEUDO_STACKING_CONTEXT);
    // That should put the display items in set.Content()
  }
  
  // Put the foreground outline and focus rects on top of the children
  set.Content()->AppendToTop(&onTop);
  set.MoveTo(aLists);
  
  DisplayOutline(aBuilder, aLists);

  // to draw border when selected in editor
  DisplaySelectionOverlay(aBuilder, aLists.Content());
}

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

  aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
      nsDisplayGenericOverflow(aBuilder, this, ::PaintColumnRule, "ColumnRule",
                               nsDisplayItem::TYPE_COLUMN_RULE));
  
  // Our children won't have backgrounds so it doesn't matter where we put them.
  for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
    BuildDisplayListForChild(aBuilder, e.get(), aDirtyRect, aLists);
  }
}

void
nsGroupBoxFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                  const nsRect&           aDirtyRect,
                                  const nsDisplayListSet& aLists)
{
  // Paint our background and border
  if (IsVisibleForPainting(aBuilder)) {
    aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
      nsDisplayXULGroupBackground(aBuilder, this));
    
    DisplayOutline(aBuilder, aLists);
  }

  BuildDisplayListForChildren(aBuilder, aDirtyRect, aLists);
}

nsresult
nsTableCellFrame::ProcessBorders(nsTableFrame* aFrame,
                                 nsDisplayListBuilder* aBuilder,
                                 const nsDisplayListSet& aLists)
{
  const nsStyleBorder* borderStyle = StyleBorder();
  if (aFrame->IsBorderCollapse() || !borderStyle->HasBorder())
    return NS_OK;

  if (!GetContentEmpty() ||
      StyleTableBorder()->mEmptyCells == NS_STYLE_TABLE_EMPTY_CELLS_SHOW) {
    aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
                                              nsDisplayBorder(aBuilder, this));
  }

  return NS_OK;
}

NS_IMETHODIMP
nsHTMLButtonControlFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                           const nsRect&           aDirtyRect,
                                           const nsDisplayListSet& aLists)
{
  nsDisplayList onTop;
  if (IsVisibleForPainting(aBuilder)) {
    nsresult rv = mRenderer.DisplayButton(aBuilder, aLists.BorderBackground(), &onTop);
    NS_ENSURE_SUCCESS(rv, rv);
  }
  
  nsDisplayListCollection set;
  // Do not allow the child subtree to receive events.
  if (!aBuilder->IsForEventDelivery()) {
    nsresult rv =
      BuildDisplayListForChild(aBuilder, mFrames.FirstChild(), aDirtyRect, set,
                               DISPLAY_CHILD_FORCE_PSEUDO_STACKING_CONTEXT);
    NS_ENSURE_SUCCESS(rv, rv);
    // That should put the display items in set.Content()
  }
  
  // Put the foreground outline and focus rects on top of the children
  set.Content()->AppendToTop(&onTop);

  // clips to our padding box for <input>s but not <button>s, unless
  // they have non-visible overflow..
  if (IsInput() || GetStyleDisplay()->mOverflowX != NS_STYLE_OVERFLOW_VISIBLE) {
    nsMargin border = GetStyleBorder()->GetComputedBorder();
    nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
    rect.Deflate(border);
    nscoord radii[8];
    GetPaddingBoxBorderRadii(radii);

    nsresult rv = OverflowClip(aBuilder, set, aLists, rect, radii);
    NS_ENSURE_SUCCESS(rv, rv);
  } else {
    set.MoveTo(aLists);
  }
  
  nsresult rv = DisplayOutline(aBuilder, aLists);
  NS_ENSURE_SUCCESS(rv, rv);

  // to draw border when selected in editor
  return DisplaySelectionOverlay(aBuilder, aLists.Content());
}

NS_IMETHODIMP
nsGroupBoxFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                  const nsRect&           aDirtyRect,
                                  const nsDisplayListSet& aLists)
{
  // Paint our background and border
  if (IsVisibleForPainting(aBuilder)) {
    nsresult rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
        nsDisplayXULGroupBackground(this));
    NS_ENSURE_SUCCESS(rv, rv);
    
    rv = DisplayOutline(aBuilder, aLists);
    NS_ENSURE_SUCCESS(rv, rv);
  }

  return BuildDisplayListForChildren(aBuilder, aDirtyRect, aLists);
  // REVIEW: Debug borders now painted by nsFrame::BuildDisplayListForChild
}

NS_IMETHODIMP
nsColumnSetFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                   const nsRect&           aDirtyRect,
                                   const nsDisplayListSet& aLists) {
  nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
  NS_ENSURE_SUCCESS(rv, rv);

  aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
      nsDisplayGeneric(aBuilder, this, ::PaintColumnRule, "ColumnRule",
                       nsDisplayItem::TYPE_COLUMN_RULE));
  
  // Our children won't have backgrounds so it doesn't matter where we put them.
  for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
    nsresult rv = BuildDisplayListForChild(aBuilder, e.get(),
                                           aDirtyRect, aLists);
    NS_ENSURE_SUCCESS(rv, rv);
  }
  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>";
  }
}

NS_IMETHODIMP
nsFileControlFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                     const nsRect&           aDirtyRect,
                                     const nsDisplayListSet& aLists)
{
  // box-shadow
  if (GetStyleBorder()->mBoxShadow) {
    nsresult rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
        nsDisplayBoxShadowOuter(aBuilder, this));
    NS_ENSURE_SUCCESS(rv, rv);
  }

  // Our background is inherited to the text input, and we don't really want to
  // paint it or out padding and borders (which we never have anyway, per
  // styles in forms.css) -- doing it just makes us look ugly in some cases and
  // has no effect in others.
  nsDisplayListCollection tempList;
  nsresult rv = nsBlockFrame::BuildDisplayList(aBuilder, aDirtyRect, tempList);
  if (NS_FAILED(rv))
    return rv;

  tempList.BorderBackground()->DeleteAll();

  // Clip height only
  nsRect clipRect(aBuilder->ToReferenceFrame(this), GetSize());
  clipRect.width = GetVisualOverflowRect().XMost();
  nscoord radii[8] = {0, 0, 0, 0, 0, 0, 0, 0};
  rv = OverflowClip(aBuilder, tempList, aLists, clipRect, radii);
  NS_ENSURE_SUCCESS(rv, rv);

  // Disabled file controls don't pass mouse events to their children, so we
  // put an invisible item in the display list above the children
  // just to catch events
  nsEventStates eventStates = mContent->AsElement()->State();
  if (eventStates.HasState(NS_EVENT_STATE_DISABLED) && IsVisibleForPainting(aBuilder)) {
    rv = aLists.Content()->AppendNewToTop(
        new (aBuilder) nsDisplayEventReceiver(aBuilder, this));
    if (NS_FAILED(rv))
      return rv;
  }

  return DisplaySelectionOverlay(aBuilder, aLists.Content());
}

NS_IMETHODIMP
nsColumnSetFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                   const nsRect&           aDirtyRect,
                                   const nsDisplayListSet& aLists) {
  nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
  NS_ENSURE_SUCCESS(rv, rv);

  aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
      nsDisplayGeneric(aBuilder, this, ::PaintColumnRule, "ColumnRule",
                       nsDisplayItem::TYPE_COLUMN_RULE));
  
  nsIFrame* kid = mFrames.FirstChild();
  // Our children won't have backgrounds so it doesn't matter where we put them.
  while (kid) {
    nsresult rv = BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists);
    NS_ENSURE_SUCCESS(rv, rv);
    kid = kid->GetNextSibling();
  }
  return NS_OK;
}