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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
// Keep in (case-insensitive) order:
#include "mozilla/PresShell.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/dom/SVGFilters.h"
#include "ComputedStyle.h"
#include "nsContainerFrame.h"
#include "nsIFrame.h"
#include "nsGkAtoms.h"
using namespace mozilla::dom;
nsIFrame* NS_NewSVGFELeafFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
namespace mozilla {
* This frame is used by filter primitive elements that don't
* have special child elements that provide parameters.
class SVGFELeafFrame final : public nsIFrame {
friend nsIFrame* ::NS_NewSVGFELeafFrame(mozilla::PresShell* aPresShell,
ComputedStyle* aStyle);
explicit SVGFELeafFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: nsIFrame(aStyle, aPresContext, kClassID) {
#ifdef DEBUG
virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
virtual bool IsFrameOfType(uint32_t aFlags) const override {
if (aFlags & eSupportsContainLayoutAndPaint) {
return false;
return nsIFrame::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
virtual nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"SVGFELeaf"_ns, aResult);
virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) override;
virtual bool ComputeCustomOverflow(OverflowAreas& aOverflowAreas) override {
// We don't maintain a ink overflow rect
return false;
} // namespace mozilla
nsIFrame* NS_NewSVGFELeafFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGFELeafFrame(aStyle, aPresShell->GetPresContext());
namespace mozilla {
#ifdef DEBUG
void SVGFELeafFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
nsCOMPtr<SVGFE> filterPrimitive = do_QueryInterface(aContent);
"Trying to construct an SVGFELeafFrame for a "
"content element that doesn't support the right interfaces");
nsIFrame::Init(aContent, aParent, aPrevInFlow);
#endif /* DEBUG */
nsresult SVGFELeafFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
auto* element = static_cast<mozilla::dom::SVGFE*>(GetContent());
if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
"Observers observe the filter, so that's what we must invalidate");
return nsIFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
} // namespace mozilla