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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /layout/svg/SVGSwitchFrame.cpp | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/svg/SVGSwitchFrame.cpp')
-rw-r--r-- | layout/svg/SVGSwitchFrame.cpp | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/layout/svg/SVGSwitchFrame.cpp b/layout/svg/SVGSwitchFrame.cpp new file mode 100644 index 0000000000..4238e6b017 --- /dev/null +++ b/layout/svg/SVGSwitchFrame.cpp @@ -0,0 +1,262 @@ +/* -*- 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 "gfxRect.h" +#include "SVGGFrame.h" +#include "mozilla/PresShell.h" +#include "mozilla/SVGContainerFrame.h" +#include "mozilla/SVGObserverUtils.h" +#include "mozilla/SVGTextFrame.h" +#include "mozilla/SVGUtils.h" +#include "mozilla/dom/SVGSwitchElement.h" + +using namespace mozilla::dom; +using namespace mozilla::gfx; +using namespace mozilla::image; + +nsIFrame* NS_NewSVGSwitchFrame(mozilla::PresShell* aPresShell, + mozilla::ComputedStyle* aStyle); + +namespace mozilla { + +class SVGSwitchFrame final : public SVGGFrame { + friend nsIFrame* ::NS_NewSVGSwitchFrame(mozilla::PresShell* aPresShell, + ComputedStyle* aStyle); + + protected: + explicit SVGSwitchFrame(ComputedStyle* aStyle, nsPresContext* aPresContext) + : SVGGFrame(aStyle, aPresContext, kClassID) {} + + public: + NS_DECL_FRAMEARENA_HELPERS(SVGSwitchFrame) + +#ifdef DEBUG + virtual void Init(nsIContent* aContent, nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) override; +#endif + +#ifdef DEBUG_FRAME_DUMP + nsresult GetFrameName(nsAString& aResult) const override { + return MakeFrameName(u"SVGSwitch"_ns, aResult); + } +#endif + + virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder, + const nsDisplayListSet& aLists) override; + + // ISVGDisplayableFrame interface: + virtual void PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform, + imgDrawingParams& aImgParams) override; + nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override; + void ReflowSVG() override; + virtual SVGBBox GetBBoxContribution(const Matrix& aToBBoxUserspace, + uint32_t aFlags) override; + + private: + nsIFrame* GetActiveChildFrame(); + void ReflowAllSVGTextFramesInsideNonActiveChildren(nsIFrame* aActiveChild); + static void AlwaysReflowSVGTextFrameDoForOneKid(nsIFrame* aKid); +}; + +} // namespace mozilla + +//---------------------------------------------------------------------- +// Implementation + +nsIFrame* NS_NewSVGSwitchFrame(mozilla::PresShell* aPresShell, + mozilla::ComputedStyle* aStyle) { + return new (aPresShell) + mozilla::SVGSwitchFrame(aStyle, aPresShell->GetPresContext()); +} + +namespace mozilla { + +NS_IMPL_FRAMEARENA_HELPERS(SVGSwitchFrame) + +#ifdef DEBUG +void SVGSwitchFrame::Init(nsIContent* aContent, nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) { + NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::svgSwitch), + "Content is not an SVG switch"); + + SVGGFrame::Init(aContent, aParent, aPrevInFlow); +} +#endif /* DEBUG */ + +void SVGSwitchFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, + const nsDisplayListSet& aLists) { + nsIFrame* kid = GetActiveChildFrame(); + if (kid) { + BuildDisplayListForChild(aBuilder, kid, aLists); + } +} + +void SVGSwitchFrame::PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform, + imgDrawingParams& aImgParams) { + NS_ASSERTION(HasAnyStateBits(NS_FRAME_IS_NONDISPLAY), + "Only painting of non-display SVG should take this code path"); + + if (StyleEffects()->IsTransparent()) { + return; + } + + nsIFrame* kid = GetActiveChildFrame(); + if (kid) { + gfxMatrix tm = aTransform; + if (kid->GetContent()->IsSVGElement()) { + tm = SVGUtils::GetTransformMatrixInUserSpace(kid) * tm; + } + SVGUtils::PaintFrameWithEffects(kid, aContext, tm, aImgParams); + } +} + +nsIFrame* SVGSwitchFrame::GetFrameForPoint(const gfxPoint& aPoint) { + MOZ_ASSERT_UNREACHABLE("A clipPath cannot contain an SVGSwitch element"); + return nullptr; +} + +static bool shouldReflowSVGTextFrameInside(nsIFrame* aFrame) { + return aFrame->IsFrameOfType(nsIFrame::eSVG | nsIFrame::eSVGContainer) || + aFrame->IsSVGForeignObjectFrame() || + !aFrame->IsFrameOfType(nsIFrame::eSVG); +} + +void SVGSwitchFrame::AlwaysReflowSVGTextFrameDoForOneKid(nsIFrame* aKid) { + if (!aKid->IsSubtreeDirty()) { + return; + } + + if (aKid->IsSVGTextFrame()) { + MOZ_ASSERT(!aKid->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY), + "A non-display SVGTextFrame directly contained in a display " + "container?"); + static_cast<SVGTextFrame*>(aKid)->ReflowSVG(); + } else if (shouldReflowSVGTextFrameInside(aKid)) { + if (!aKid->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { + for (nsIFrame* kid : aKid->PrincipalChildList()) { + AlwaysReflowSVGTextFrameDoForOneKid(kid); + } + } else { + // This child is in a nondisplay context, something like: + // <switch> + // ... + // <g><mask><text></text></mask></g> + // </switch> + // We should not call ReflowSVG on it. + SVGContainerFrame::ReflowSVGNonDisplayText(aKid); + } + } +} + +void SVGSwitchFrame::ReflowAllSVGTextFramesInsideNonActiveChildren( + nsIFrame* aActiveChild) { + for (nsIFrame* kid = mFrames.FirstChild(); kid; kid = kid->GetNextSibling()) { + if (aActiveChild == kid) { + continue; + } + + AlwaysReflowSVGTextFrameDoForOneKid(kid); + } +} + +void SVGSwitchFrame::ReflowSVG() { + NS_ASSERTION(SVGUtils::OuterSVGIsCallingReflowSVG(this), + "This call is probably a wasteful mistake"); + + MOZ_ASSERT(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY), + "ReflowSVG mechanism not designed for this"); + + if (!SVGUtils::NeedsReflowSVG(this)) { + return; + } + + // If the NS_FRAME_FIRST_REFLOW bit has been removed from our parent frame, + // then our outer-<svg> has previously had its initial reflow. In that case + // we need to make sure that that bit has been removed from ourself _before_ + // recursing over our children to ensure that they know too. Otherwise, we + // need to remove it _after_ recursing over our children so that they know + // the initial reflow is currently underway. + + bool isFirstReflow = HasAnyStateBits(NS_FRAME_FIRST_REFLOW); + + bool outerSVGHasHadFirstReflow = + !GetParent()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW); + + if (outerSVGHasHadFirstReflow) { + RemoveStateBits(NS_FRAME_FIRST_REFLOW); // tell our children + } + + OverflowAreas overflowRects; + + nsIFrame* child = GetActiveChildFrame(); + ReflowAllSVGTextFramesInsideNonActiveChildren(child); + + ISVGDisplayableFrame* svgChild = do_QueryFrame(child); + if (svgChild) { + MOZ_ASSERT(!child->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY), + "Check for this explicitly in the |if|, then"); + svgChild->ReflowSVG(); + + // We build up our child frame overflows here instead of using + // nsLayoutUtils::UnionChildOverflow since SVG frame's all use the same + // frame list, and we're iterating over that list now anyway. + ConsiderChildOverflow(overflowRects, child); + } else if (child && shouldReflowSVGTextFrameInside(child)) { + MOZ_ASSERT(child->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY) || + !child->IsFrameOfType(nsIFrame::eSVG), + "Check for this explicitly in the |if|, then"); + ReflowSVGNonDisplayText(child); + } + + if (isFirstReflow) { + // Make sure we have our filter property (if any) before calling + // FinishAndStoreOverflow (subsequent filter changes are handled off + // nsChangeHint_UpdateEffects): + SVGObserverUtils::UpdateEffects(this); + } + + FinishAndStoreOverflow(overflowRects, mRect.Size()); + + // Remove state bits after FinishAndStoreOverflow so that it doesn't + // invalidate on first reflow: + RemoveStateBits(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY | + NS_FRAME_HAS_DIRTY_CHILDREN); +} + +SVGBBox SVGSwitchFrame::GetBBoxContribution(const Matrix& aToBBoxUserspace, + uint32_t aFlags) { + nsIFrame* kid = GetActiveChildFrame(); + ISVGDisplayableFrame* svgKid = do_QueryFrame(kid); + if (svgKid) { + nsIContent* content = kid->GetContent(); + gfxMatrix transform = ThebesMatrix(aToBBoxUserspace); + if (content->IsSVGElement()) { + transform = static_cast<SVGElement*>(content)->PrependLocalTransformsTo( + {}, eChildToUserSpace) * + SVGUtils::GetTransformMatrixInUserSpace(kid) * transform; + } + return svgKid->GetBBoxContribution(ToMatrix(transform), aFlags); + } + return SVGBBox(); +} + +nsIFrame* SVGSwitchFrame::GetActiveChildFrame() { + nsIContent* activeChild = + static_cast<dom::SVGSwitchElement*>(GetContent())->GetActiveChild(); + + if (activeChild) { + for (nsIFrame* kid = mFrames.FirstChild(); kid; + kid = kid->GetNextSibling()) { + if (activeChild == kid->GetContent()) { + return kid; + } + } + } + return nullptr; +} + +} // namespace mozilla |