mirror of
https://github.com/classilla/tenfourfox.git
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182 lines
5.4 KiB
C++
182 lines
5.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __NS_SVGMARKERFRAME_H__
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#define __NS_SVGMARKERFRAME_H__
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#include "mozilla/Attributes.h"
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#include "gfxMatrix.h"
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#include "gfxRect.h"
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#include "nsFrame.h"
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#include "nsLiteralString.h"
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#include "nsQueryFrame.h"
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#include "nsSVGContainerFrame.h"
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#include "nsSVGUtils.h"
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class gfxContext;
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class nsSVGPathGeometryFrame;
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namespace mozilla {
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namespace dom {
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class SVGSVGElement;
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} // namespace dom
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} // namespace mozilla
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struct nsSVGMark;
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typedef nsSVGContainerFrame nsSVGMarkerFrameBase;
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class nsSVGMarkerFrame : public nsSVGMarkerFrameBase
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{
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friend class nsSVGMarkerAnonChildFrame;
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friend nsContainerFrame*
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NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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protected:
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explicit nsSVGMarkerFrame(nsStyleContext* aContext)
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: nsSVGMarkerFrameBase(aContext)
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, mMarkedFrame(nullptr)
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, mInUse(false)
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, mInUse2(false)
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{
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AddStateBits(NS_FRAME_IS_NONDISPLAY);
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}
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public:
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NS_DECL_FRAMEARENA_HELPERS
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// nsIFrame interface:
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#ifdef DEBUG
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#endif
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) override {}
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) override;
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/**
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* Get the "type" of the frame
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*
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* @see nsGkAtoms::svgMarkerFrame
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*/
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virtual nsIAtom* GetType() const override;
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override
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{
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return MakeFrameName(NS_LITERAL_STRING("SVGMarker"), aResult);
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}
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#endif
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virtual nsContainerFrame* GetContentInsertionFrame() override {
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// Any children must be added to our single anonymous inner frame kid.
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MOZ_ASSERT(GetFirstPrincipalChild() &&
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GetFirstPrincipalChild()->GetType() ==
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nsGkAtoms::svgMarkerAnonChildFrame,
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"Where is our anonymous child?");
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return GetFirstPrincipalChild()->GetContentInsertionFrame();
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}
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// nsSVGMarkerFrame methods:
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nsresult PaintMark(gfxContext& aContext,
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const gfxMatrix& aToMarkedFrameUserSpace,
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nsSVGPathGeometryFrame *aMarkedFrame,
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nsSVGMark *aMark,
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float aStrokeWidth);
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SVGBBox GetMarkBBoxContribution(const Matrix &aToBBoxUserspace,
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uint32_t aFlags,
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nsSVGPathGeometryFrame *aMarkedFrame,
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const nsSVGMark *aMark,
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float aStrokeWidth);
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private:
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// stuff needed for callback
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nsSVGPathGeometryFrame *mMarkedFrame;
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float mStrokeWidth, mX, mY, mAutoAngle;
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bool mIsStart; // whether the callback is for a marker-start marker
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// nsSVGContainerFrame methods:
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virtual gfxMatrix GetCanvasTM() override;
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// A helper class to allow us to paint markers safely. The helper
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// automatically sets and clears the mInUse flag on the marker frame (to
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// prevent nasty reference loops) as well as the reference to the marked
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// frame and its coordinate context. It's easy to mess this up
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// and break things, so this helper makes the code far more robust.
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class MOZ_RAII AutoMarkerReferencer
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{
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public:
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AutoMarkerReferencer(nsSVGMarkerFrame *aFrame,
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nsSVGPathGeometryFrame *aMarkedFrame
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM);
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~AutoMarkerReferencer();
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private:
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nsSVGMarkerFrame *mFrame;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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// nsSVGMarkerFrame methods:
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void SetParentCoordCtxProvider(mozilla::dom::SVGSVGElement *aContext);
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// recursion prevention flag
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bool mInUse;
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// second recursion prevention flag, for GetCanvasTM()
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bool mInUse2;
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};
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////////////////////////////////////////////////////////////////////////
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// nsMarkerAnonChildFrame class
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typedef nsSVGDisplayContainerFrame nsSVGMarkerAnonChildFrameBase;
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/**
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*/
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class nsSVGMarkerAnonChildFrame
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: public nsSVGMarkerAnonChildFrameBase
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{
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friend nsContainerFrame*
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NS_NewSVGMarkerAnonChildFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext);
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explicit nsSVGMarkerAnonChildFrame(nsStyleContext* aContext)
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: nsSVGMarkerAnonChildFrameBase(aContext)
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{}
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public:
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NS_DECL_FRAMEARENA_HELPERS
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#ifdef DEBUG
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#endif
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override {
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return MakeFrameName(NS_LITERAL_STRING("SVGMarkerAnonChild"), aResult);
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}
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#endif
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/**
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* Get the "type" of the frame
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*
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* @see nsGkAtoms::svgMarkerAnonChildFrame
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*/
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virtual nsIAtom* GetType() const override;
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// nsSVGContainerFrame methods:
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virtual gfxMatrix GetCanvasTM() override
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{
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return static_cast<nsSVGMarkerFrame*>(GetParent())->GetCanvasTM();
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}
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};
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#endif
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