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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 "gfxMatrix.h"
#include "mozilla/PresShell.h"
#include "mozilla/SVGContainerFrame.h"
#include "mozilla/dom/SVGAElement.h"
#include "mozilla/dom/MutationEventBinding.h"
#include "SVGLengthList.h"
nsIFrame* NS_NewSVGAFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
namespace mozilla {
class SVGAFrame final : public SVGDisplayContainerFrame {
friend nsIFrame* ::NS_NewSVGAFrame(mozilla::PresShell* aPresShell,
ComputedStyle* aStyle);
explicit SVGAFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: SVGDisplayContainerFrame(aStyle, aPresContext, kClassID) {}
#ifdef DEBUG
virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
// nsIFrame:
virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) override;
virtual nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"SVGA"_ns, aResult);
} // namespace mozilla
// Implementation
nsIFrame* NS_NewSVGAFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGAFrame(aStyle, aPresShell->GetPresContext());
namespace mozilla {
// nsIFrame methods
#ifdef DEBUG
void SVGAFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
"Trying to construct an SVGAFrame for a "
"content element that doesn't support the right interfaces");
SVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow);
#endif /* DEBUG */
nsresult SVGAFrame::AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) {
if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::transform) {
// We don't invalidate for transform changes (the layers code does that).
// Also note that SVGTransformableElement::GetAttributeChangeHint will
// return nsChangeHint_UpdateOverflow for "transform" attribute changes
// and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.
// Currently our SMIL implementation does not modify the DOM attributes. Once
// we implement the SVG 2 SMIL behaviour this can be removed
// SVGAElement::SetAttr/UnsetAttr's ResetLinkState() call will be sufficient.
if (aModType == dom::MutationEvent_Binding::SMIL &&
aAttribute == nsGkAtoms::href &&
(aNameSpaceID == kNameSpaceID_None ||
aNameSpaceID == kNameSpaceID_XLink)) {
auto* content = static_cast<dom::SVGAElement*>(GetContent());
// SMIL may change whether an <a> element is a link, in which case we will
// need to update the link state.
content->ResetLinkState(true, content->ElementHasHref());
return NS_OK;
} // namespace mozilla