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/PresShell.h"
   9 #include "mozilla/SVGObserverUtils.h"
  10 #include "nsContainerFrame.h"
  11 #include "nsIFrame.h"
  12 #include "nsGkAtoms.h"
  13
  14 nsIFrame* NS_NewSVGFEUnstyledLeafFrame(mozilla::PresShell* aPresShell,
  15                                        mozilla::ComputedStyle* aStyle);
  16
  17 namespace mozilla {
  18
  19 class SVGFEUnstyledLeafFrame final : public nsIFrame {
  20   friend nsIFrame* ::NS_NewSVGFEUnstyledLeafFrame(
  21       mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
  22
  23  protected:
  24   explicit SVGFEUnstyledLeafFrame(ComputedStyle* aStyle,
  25                                   nsPresContext* aPresContext)
  26       : nsIFrame(aStyle, aPresContext, kClassID) {
  27     AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);
  28   }
  29
  30  public:
  31   NS_DECL_FRAMEARENA_HELPERS(SVGFEUnstyledLeafFrame)
  32
  33   virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
  34                                 const nsDisplayListSet& aLists) override {}
  35
  36   virtual bool IsFrameOfType(uint32_t aFlags) const override {
  37     if (aFlags & eSupportsContainLayoutAndPaint) {
  38       return false;
  39     }
  40
  41     return nsIFrame::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
  42   }
  43
  44 #ifdef DEBUG_FRAME_DUMP
  45   virtual nsresult GetFrameName(nsAString& aResult) const override {
  46     return MakeFrameName(u"SVGFEUnstyledLeaf"_ns, aResult);
  47   }
  48 #endif
  49
  50   virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
  51                                     int32_t aModType) override;
  52
  53   virtual bool ComputeCustomOverflow(OverflowAreas& aOverflowAreas) override {
  54     // We don't maintain a ink overflow rect
  55     return false;
  56   }
  57 };
  58
  59 }  // namespace mozilla
  60
  61 nsIFrame* NS_NewSVGFEUnstyledLeafFrame(mozilla::PresShell* aPresShell,
  62                                        mozilla::ComputedStyle* aStyle) {
  63   return new (aPresShell)
  64       mozilla::SVGFEUnstyledLeafFrame(aStyle, aPresShell->GetPresContext());
  65 }
  66
  67 namespace mozilla {
  68
  69 NS_IMPL_FRAMEARENA_HELPERS(SVGFEUnstyledLeafFrame)
  70
  71 nsresult SVGFEUnstyledLeafFrame::AttributeChanged(int32_t aNameSpaceID,
  72                                                   nsAtom* aAttribute,
  73                                                   int32_t aModType) {
  74   auto* element =
  75       static_cast<mozilla::dom::SVGFEUnstyledElement*>(GetContent());
  76   if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
  77     MOZ_ASSERT(
  78         GetParent()->GetParent()->IsSVGFilterFrame(),
  79         "Observers observe the filter, so that's what we must invalidate");
  80     SVGObserverUtils::InvalidateDirectRenderingObservers(
  81         GetParent()->GetParent());
  82   }
  83
  84   return nsIFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
  85 }
  86
  87 }  // namespace mozilla