From 2aa4a82499d4becd2284cdb482213d541b8804dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 16:29:10 +0200 Subject: Adding upstream version 86.0.1. Signed-off-by: Daniel Baumann --- layout/svg/SVGFEImageFrame.cpp | 172 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 172 insertions(+) create mode 100644 layout/svg/SVGFEImageFrame.cpp (limited to 'layout/svg/SVGFEImageFrame.cpp') diff --git a/layout/svg/SVGFEImageFrame.cpp b/layout/svg/SVGFEImageFrame.cpp new file mode 100644 index 0000000000..b391deb86c --- /dev/null +++ b/layout/svg/SVGFEImageFrame.cpp @@ -0,0 +1,172 @@ +/* -*- 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 http://mozilla.org/MPL/2.0/. */ + +// Keep in (case-insensitive) order: +#include "mozilla/PresShell.h" +#include "mozilla/SVGObserverUtils.h" +#include "mozilla/dom/SVGFEImageElement.h" +#include "mozilla/dom/MutationEventBinding.h" +#include "nsContainerFrame.h" +#include "nsIFrame.h" +#include "nsGkAtoms.h" +#include "nsLiteralString.h" + +using namespace mozilla::dom; + +nsIFrame* NS_NewSVGFEImageFrame(mozilla::PresShell* aPresShell, + mozilla::ComputedStyle* aStyle); + +namespace mozilla { + +class SVGFEImageFrame final : public nsIFrame { + friend nsIFrame* ::NS_NewSVGFEImageFrame(mozilla::PresShell* aPresShell, + ComputedStyle* aStyle); + + protected: + explicit SVGFEImageFrame(ComputedStyle* aStyle, nsPresContext* aPresContext) + : nsIFrame(aStyle, aPresContext, kClassID) { + AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY); + + // This frame isn't actually displayed, but it contains an image and we want + // to use the nsImageLoadingContent machinery for managing images, which + // requires visibility tracking, so we enable visibility tracking and + // forcibly mark it visible below. + EnableVisibilityTracking(); + } + + public: + NS_DECL_FRAMEARENA_HELPERS(SVGFEImageFrame) + + virtual void Init(nsIContent* aContent, nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) override; + virtual void DestroyFrom(nsIFrame* aDestructRoot, + PostDestroyData& aPostDestroyData) override; + + virtual bool IsFrameOfType(uint32_t aFlags) const override { + if (aFlags & eSupportsContainLayoutAndPaint) { + return false; + } + + return nsIFrame::IsFrameOfType(aFlags & ~(nsIFrame::eSVG)); + } + +#ifdef DEBUG_FRAME_DUMP + virtual nsresult GetFrameName(nsAString& aResult) const override { + return MakeFrameName(u"SVGFEImage"_ns, aResult); + } +#endif + + virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute, + int32_t aModType) override; + + void OnVisibilityChange( + Visibility aNewVisibility, + const Maybe& aNonvisibleAction = Nothing()) override; + + virtual bool ComputeCustomOverflow(OverflowAreas& aOverflowAreas) override { + // We don't maintain a ink overflow rect + return false; + } +}; + +} // namespace mozilla + +nsIFrame* NS_NewSVGFEImageFrame(mozilla::PresShell* aPresShell, + mozilla::ComputedStyle* aStyle) { + return new (aPresShell) + mozilla::SVGFEImageFrame(aStyle, aPresShell->GetPresContext()); +} + +namespace mozilla { + +NS_IMPL_FRAMEARENA_HELPERS(SVGFEImageFrame) + +/* virtual */ +void SVGFEImageFrame::DestroyFrom(nsIFrame* aDestructRoot, + PostDestroyData& aPostDestroyData) { + DecApproximateVisibleCount(); + + nsCOMPtr imageLoader = + do_QueryInterface(nsIFrame::mContent); + if (imageLoader) { + imageLoader->FrameDestroyed(this); + } + + nsIFrame::DestroyFrom(aDestructRoot, aPostDestroyData); +} + +void SVGFEImageFrame::Init(nsIContent* aContent, nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) { + NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::feImage), + "Trying to construct an SVGFEImageFrame for a " + "content element that doesn't support the right interfaces"); + + nsIFrame::Init(aContent, aParent, aPrevInFlow); + + // We assume that feImage's are always visible. + // This call must happen before the FrameCreated. This is because the + // primary frame pointer on our content node isn't set until after this + // function ends, so there is no way for the resulting OnVisibilityChange + // notification to get a frame. FrameCreated has a workaround for this in + // that it passes our frame around so it can be accessed. OnVisibilityChange + // doesn't have that workaround. + IncApproximateVisibleCount(); + + nsCOMPtr imageLoader = + do_QueryInterface(nsIFrame::mContent); + if (imageLoader) { + imageLoader->FrameCreated(this); + } +} + +nsresult SVGFEImageFrame::AttributeChanged(int32_t aNameSpaceID, + nsAtom* aAttribute, + int32_t aModType) { + SVGFEImageElement* element = static_cast(GetContent()); + if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) { + MOZ_ASSERT( + GetParent()->IsSVGFilterFrame(), + "Observers observe the filter, so that's what we must invalidate"); + SVGObserverUtils::InvalidateDirectRenderingObservers(GetParent()); + } + + // Currently our SMIL implementation does not modify the DOM attributes. Once + // we implement the SVG 2 SMIL behaviour this can be removed + // SVGFEImageElement::AfterSetAttr's implementation will be sufficient. + if (aModType == MutationEvent_Binding::SMIL && + aAttribute == nsGkAtoms::href && + (aNameSpaceID == kNameSpaceID_XLink || + aNameSpaceID == kNameSpaceID_None)) { + bool hrefIsSet = + element->mStringAttributes[SVGFEImageElement::HREF].IsExplicitlySet() || + element->mStringAttributes[SVGFEImageElement::XLINK_HREF] + .IsExplicitlySet(); + if (hrefIsSet) { + element->LoadSVGImage(true, true); + } else { + element->CancelImageRequests(true); + } + } + + return nsIFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType); +} + +void SVGFEImageFrame::OnVisibilityChange( + Visibility aNewVisibility, const Maybe& aNonvisibleAction) { + nsCOMPtr imageLoader = + do_QueryInterface(nsIFrame::mContent); + if (!imageLoader) { + MOZ_ASSERT_UNREACHABLE("Should have an nsIImageLoadingContent"); + nsIFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction); + return; + } + + imageLoader->OnVisibilityChange(aNewVisibility, aNonvisibleAction); + + nsIFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction); +} + +} // namespace mozilla -- cgit v1.2.3