/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* 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/. */ #ifndef __NS_SVGMARKERFRAME_H__ #define __NS_SVGMARKERFRAME_H__ #include "mozilla/Attributes.h" #include "gfxMatrix.h" #include "gfxRect.h" #include "nsFrame.h" #include "nsLiteralString.h" #include "nsQueryFrame.h" #include "nsSVGContainerFrame.h" #include "nsSVGUtils.h" class gfxContext; class nsSVGPathGeometryFrame; namespace mozilla { namespace dom { class SVGSVGElement; } // namespace dom } // namespace mozilla struct nsSVGMark; class nsSVGMarkerFrame : public nsSVGContainerFrame { friend class nsSVGMarkerAnonChildFrame; friend nsContainerFrame* NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); protected: explicit nsSVGMarkerFrame(nsStyleContext* aContext) : nsSVGContainerFrame(aContext) , mMarkedFrame(nullptr) , mInUse(false) , mInUse2(false) { AddStateBits(NS_FRAME_IS_NONDISPLAY); } public: NS_DECL_FRAMEARENA_HELPERS // nsIFrame interface: #ifdef DEBUG virtual void Init(nsIContent* aContent, nsContainerFrame* aParent, nsIFrame* aPrevInFlow) override; #endif virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) override {} virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsIAtom* aAttribute, int32_t aModType) override; /** * Get the "type" of the frame * * @see nsGkAtoms::svgMarkerFrame */ virtual nsIAtom* GetType() const override; #ifdef DEBUG_FRAME_DUMP virtual nsresult GetFrameName(nsAString& aResult) const override { return MakeFrameName(NS_LITERAL_STRING("SVGMarker"), aResult); } #endif virtual nsContainerFrame* GetContentInsertionFrame() override { // Any children must be added to our single anonymous inner frame kid. MOZ_ASSERT(PrincipalChildList().FirstChild() && PrincipalChildList().FirstChild()->GetType() == nsGkAtoms::svgMarkerAnonChildFrame, "Where is our anonymous child?"); return PrincipalChildList().FirstChild()->GetContentInsertionFrame(); } // nsSVGMarkerFrame methods: nsresult PaintMark(gfxContext& aContext, const gfxMatrix& aToMarkedFrameUserSpace, nsSVGPathGeometryFrame *aMarkedFrame, nsSVGMark *aMark, float aStrokeWidth); SVGBBox GetMarkBBoxContribution(const Matrix &aToBBoxUserspace, uint32_t aFlags, nsSVGPathGeometryFrame *aMarkedFrame, const nsSVGMark *aMark, float aStrokeWidth); private: // stuff needed for callback nsSVGPathGeometryFrame *mMarkedFrame; float mStrokeWidth, mX, mY, mAutoAngle; bool mIsStart; // whether the callback is for a marker-start marker // nsSVGContainerFrame methods: virtual gfxMatrix GetCanvasTM() override; // A helper class to allow us to paint markers safely. The helper // automatically sets and clears the mInUse flag on the marker frame (to // prevent nasty reference loops) as well as the reference to the marked // frame and its coordinate context. It's easy to mess this up // and break things, so this helper makes the code far more robust. class MOZ_RAII AutoMarkerReferencer { public: AutoMarkerReferencer(nsSVGMarkerFrame *aFrame, nsSVGPathGeometryFrame *aMarkedFrame MOZ_GUARD_OBJECT_NOTIFIER_PARAM); ~AutoMarkerReferencer(); private: nsSVGMarkerFrame *mFrame; MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER }; // nsSVGMarkerFrame methods: void SetParentCoordCtxProvider(mozilla::dom::SVGSVGElement *aContext); // recursion prevention flag bool mInUse; // second recursion prevention flag, for GetCanvasTM() bool mInUse2; }; //////////////////////////////////////////////////////////////////////// // nsMarkerAnonChildFrame class class nsSVGMarkerAnonChildFrame : public nsSVGDisplayContainerFrame { friend nsContainerFrame* NS_NewSVGMarkerAnonChildFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); explicit nsSVGMarkerAnonChildFrame(nsStyleContext* aContext) : nsSVGDisplayContainerFrame(aContext) {} public: NS_DECL_FRAMEARENA_HELPERS #ifdef DEBUG virtual void Init(nsIContent* aContent, nsContainerFrame* aParent, nsIFrame* aPrevInFlow) override; #endif #ifdef DEBUG_FRAME_DUMP virtual nsresult GetFrameName(nsAString& aResult) const override { return MakeFrameName(NS_LITERAL_STRING("SVGMarkerAnonChild"), aResult); } #endif /** * Get the "type" of the frame * * @see nsGkAtoms::svgMarkerAnonChildFrame */ virtual nsIAtom* GetType() const override; // nsSVGContainerFrame methods: virtual gfxMatrix GetCanvasTM() override { return static_cast<nsSVGMarkerFrame*>(GetParent())->GetCanvasTM(); } }; #endif