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/* -*- 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 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
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