зеркало из https://github.com/mozilla/gecko-dev.git
126 строки
3.5 KiB
C++
126 строки
3.5 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 "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 nsIAtom;
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class nsIContent;
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class nsIFrame;
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class nsIPresShell;
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class nsRenderingContext;
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class nsStyleContext;
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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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}
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}
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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 nsIFrame*
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NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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protected:
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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_STATE_SVG_NONDISPLAY_CHILD);
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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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NS_IMETHOD Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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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) MOZ_OVERRIDE {}
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NS_IMETHOD AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType);
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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;
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const
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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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// nsSVGMarkerFrame methods:
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nsresult PaintMark(nsRenderingContext *aContext,
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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 gfxMatrix &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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// nsSVGContainerFrame methods:
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virtual gfxMatrix GetCanvasTM(uint32_t aFor);
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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 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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~AutoMarkerReferencer();
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private:
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nsSVGMarkerFrame *mFrame;
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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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#endif
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