Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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
#ifndef LAYOUT_SVG_SVGMARKERFRAME_H_
#define LAYOUT_SVG_SVGMARKERFRAME_H_
#include "mozilla/Attributes.h"
#include "mozilla/SVGContainerFrame.h"
#include "gfxMatrix.h"
#include "gfxRect.h"
#include "nsIFrame.h"
#include "nsLiteralString.h"
#include "nsQueryFrame.h"
class gfxContext;
namespace mozilla {
class PresShell;
class SVGGeometryFrame;
struct SVGMark;
namespace dom {
class SVGViewportElement;
} // namespace dom
} // namespace mozilla
nsContainerFrame* NS_NewSVGMarkerFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
nsContainerFrame* NS_NewSVGMarkerAnonChildFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
namespace mozilla {
class SVGMarkerFrame final : public SVGContainerFrame {
using imgDrawingParams = image::imgDrawingParams;
friend class SVGMarkerAnonChildFrame;
friend nsContainerFrame* ::NS_NewSVGMarkerFrame(
mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
protected:
explicit SVGMarkerFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: SVGContainerFrame(aStyle, aPresContext, kClassID),
mMarkedFrame(nullptr),
mInUse(false),
mInUse2(false) {
AddStateBits(NS_FRAME_IS_NONDISPLAY |
NS_STATE_SVG_RENDERING_OBSERVER_CONTAINER);
}
public:
NS_DECL_FRAMEARENA_HELPERS(SVGMarkerFrame)
// nsIFrame interface:
#ifdef DEBUG
void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
#endif
void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override {}
nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) override;
#ifdef DEBUG_FRAME_DUMP
nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"SVGMarker"_ns, aResult);
}
#endif
nsContainerFrame* GetContentInsertionFrame() override {
// Any children must be added to our single anonymous inner frame kid.
MOZ_ASSERT(
PrincipalChildList().FirstChild() &&
PrincipalChildList().FirstChild()->IsSVGMarkerAnonChildFrame(),
"Where is our anonymous child?");
return PrincipalChildList().FirstChild()->GetContentInsertionFrame();
}
// SVGMarkerFrame methods:
void PaintMark(gfxContext& aContext, const gfxMatrix& aToMarkedFrameUserSpace,
SVGGeometryFrame* aMarkedFrame, const SVGMark& aMark,
float aStrokeWidth, imgDrawingParams& aImgParams);
SVGBBox GetMarkBBoxContribution(const Matrix& aToBBoxUserspace,
uint32_t aFlags,
SVGGeometryFrame* aMarkedFrame,
const SVGMark& aMark, float aStrokeWidth);
// Return our anonymous box child.
void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) override;
private:
// stuff needed for callback
SVGGeometryFrame* mMarkedFrame;
Matrix mMarkerTM;
// SVGContainerFrame methods:
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(SVGMarkerFrame* aFrame,
SVGGeometryFrame* aMarkedFrame);
~AutoMarkerReferencer();
private:
SVGMarkerFrame* mFrame;
};
// SVGMarkerFrame methods:
void SetParentCoordCtxProvider(dom::SVGViewportElement* aContext);
// recursion prevention flag
bool mInUse;
// second recursion prevention flag, for GetCanvasTM()
bool mInUse2;
};
////////////////////////////////////////////////////////////////////////
// nsMarkerAnonChildFrame class
class SVGMarkerAnonChildFrame final : public SVGDisplayContainerFrame {
friend nsContainerFrame* ::NS_NewSVGMarkerAnonChildFrame(
mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
explicit SVGMarkerAnonChildFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: SVGDisplayContainerFrame(aStyle, aPresContext, kClassID) {}
public:
NS_DECL_FRAMEARENA_HELPERS(SVGMarkerAnonChildFrame)
#ifdef DEBUG
void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
#endif
#ifdef DEBUG_FRAME_DUMP
nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"SVGMarkerAnonChild"_ns, aResult);
}
#endif
// SVGContainerFrame methods:
gfxMatrix GetCanvasTM() override {
return static_cast<SVGMarkerFrame*>(GetParent())->GetCanvasTM();
}
};
} // namespace mozilla
#endif // LAYOUT_SVG_SVGMARKERFRAME_H_