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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /layout/svg/SVGStopFrame.cpp | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/svg/SVGStopFrame.cpp')
-rw-r--r-- | layout/svg/SVGStopFrame.cpp | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/layout/svg/SVGStopFrame.cpp b/layout/svg/SVGStopFrame.cpp new file mode 100644 index 0000000000..b6a3ab69a6 --- /dev/null +++ b/layout/svg/SVGStopFrame.cpp @@ -0,0 +1,105 @@ +/* -*- 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 "nsContainerFrame.h" +#include "nsIFrame.h" +#include "nsGkAtoms.h" +#include "mozilla/ComputedStyle.h" +#include "mozilla/PresShell.h" +#include "mozilla/SVGGradientFrame.h" +#include "mozilla/SVGObserverUtils.h" + +// This is a very simple frame whose only purpose is to capture style change +// events and propagate them to the parent. Most of the heavy lifting is done +// within the SVGGradientFrame, which is the parent for this frame + +nsIFrame* NS_NewSVGStopFrame(mozilla::PresShell* aPresShell, + mozilla::ComputedStyle* aStyle); + +namespace mozilla { + +class SVGStopFrame : public nsIFrame { + friend nsIFrame* ::NS_NewSVGStopFrame(mozilla::PresShell* aPresShell, + ComputedStyle* aStyle); + + protected: + explicit SVGStopFrame(ComputedStyle* aStyle, nsPresContext* aPresContext) + : nsIFrame(aStyle, aPresContext, kClassID) { + AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY); + } + + public: + NS_DECL_FRAMEARENA_HELPERS(SVGStopFrame) + + // nsIFrame interface: +#ifdef DEBUG + virtual void Init(nsIContent* aContent, nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) override; +#endif + + void BuildDisplayList(nsDisplayListBuilder* aBuilder, + const nsDisplayListSet& aLists) override {} + + virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute, + int32_t aModType) override; + + bool IsFrameOfType(uint32_t aFlags) const override { + if (aFlags & eSupportsContainLayoutAndPaint) { + return false; + } + + return nsIFrame::IsFrameOfType(aFlags & ~(nsIFrame::eSVG)); + } + +#ifdef DEBUG_FRAME_DUMP + nsresult GetFrameName(nsAString& aResult) const override { + return MakeFrameName(u"SVGStop"_ns, aResult); + } +#endif +}; + +//---------------------------------------------------------------------- +// Implementation + +NS_IMPL_FRAMEARENA_HELPERS(SVGStopFrame) + +//---------------------------------------------------------------------- +// nsIFrame methods: + +#ifdef DEBUG +void SVGStopFrame::Init(nsIContent* aContent, nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) { + NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::stop), + "Content is not a stop element"); + + nsIFrame::Init(aContent, aParent, aPrevInFlow); +} +#endif /* DEBUG */ + +nsresult SVGStopFrame::AttributeChanged(int32_t aNameSpaceID, + nsAtom* aAttribute, int32_t aModType) { + if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::offset) { + MOZ_ASSERT( + static_cast<SVGGradientFrame*>(do_QueryFrame(GetParent())), + "Observers observe the gradient, so that's what we must invalidate"); + SVGObserverUtils::InvalidateDirectRenderingObservers(GetParent()); + } + + return nsIFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType); +} + +} // namespace mozilla + +// ------------------------------------------------------------------------- +// Public functions +// ------------------------------------------------------------------------- + +nsIFrame* NS_NewSVGStopFrame(mozilla::PresShell* aPresShell, + mozilla::ComputedStyle* aStyle) { + return new (aPresShell) + mozilla::SVGStopFrame(aStyle, aPresShell->GetPresContext()); +} |