layout/svg/SVGFEUnstyledLeafFrame.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 // Keep in (case-insensitive) order:
   8 #include "mozilla/dom/SVGFilters.h"
   9 #include "mozilla/PresShell.h"
  10 #include "mozilla/SVGObserverUtils.h"
  11 #include "nsContainerFrame.h"
  12 #include "nsIFrame.h"
  13 #include "nsGkAtoms.h"
  14
  15 nsIFrame* NS_NewSVGFEUnstyledLeafFrame(mozilla::PresShell* aPresShell,
  16                                        mozilla::ComputedStyle* aStyle);
  17
  18 namespace mozilla {
  19
  20 class SVGFEUnstyledLeafFrame final : public nsIFrame {
  21   friend nsIFrame* ::NS_NewSVGFEUnstyledLeafFrame(
  22       mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
  23
  24  protected:
  25   explicit SVGFEUnstyledLeafFrame(ComputedStyle* aStyle,
  26                                   nsPresContext* aPresContext)
  27       : nsIFrame(aStyle, aPresContext, kClassID) {
  28     AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);
  29   }
  30
  31  public:
  32   NS_DECL_FRAMEARENA_HELPERS(SVGFEUnstyledLeafFrame)
  33
  34   void BuildDisplayList(nsDisplayListBuilder* aBuilder,
  35                         const nsDisplayListSet& aLists) override {}
  36
  37 #ifdef DEBUG_FRAME_DUMP
  38   nsresult GetFrameName(nsAString& aResult) const override {
  39     return MakeFrameName(u"SVGFEUnstyledLeaf"_ns, aResult);
  40   }
  41 #endif
  42
  43   nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
  44                             int32_t aModType) override;
  45
  46   bool ComputeCustomOverflow(OverflowAreas& aOverflowAreas) override {
  47     // We don't maintain a ink overflow rect
  48     return false;
  49   }
  50 };
  51
  52 }  // namespace mozilla
  53
  54 nsIFrame* NS_NewSVGFEUnstyledLeafFrame(mozilla::PresShell* aPresShell,
  55                                        mozilla::ComputedStyle* aStyle) {
  56   return new (aPresShell)
  57       mozilla::SVGFEUnstyledLeafFrame(aStyle, aPresShell->GetPresContext());
  58 }
  59
  60 namespace mozilla {
  61
  62 NS_IMPL_FRAMEARENA_HELPERS(SVGFEUnstyledLeafFrame)
  63
  64 nsresult SVGFEUnstyledLeafFrame::AttributeChanged(int32_t aNameSpaceID,
  65                                                   nsAtom* aAttribute,
  66                                                   int32_t aModType) {
  67   auto* element =
  68       static_cast<mozilla::dom::SVGFilterPrimitiveChildElement*>(GetContent());
  69   if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
  70     MOZ_ASSERT(
  71         GetParent()->GetParent()->IsSVGFilterFrame(),
  72         "Observers observe the filter, so that's what we must invalidate");
  73     SVGObserverUtils::InvalidateRenderingObservers(GetParent()->GetParent());
  74   }
  75
  76   return nsIFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
  77 }
  78
  79 }  // namespace mozilla