author Emilio Cobos Álvarez <>
Sun, 30 Apr 2017 17:30:08 +0200
changeset 355830 662df8ef329fd7a38fb2ceb24e305cd31e7bcaa7
parent 350304 19119865d8988d95dbddb7be5b66ad6d97c40279
child 356045 fbc54f707dc421f8132340e45fa2719dbdc9621b
permissions -rw-r--r--
Bug 1360241: Devirtualize nsIFrame::GetType. r=heycam MozReview-Commit-ID: 5Nzhyta5Hle

/* -*- 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 */


#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;

namespace mozilla {
class SVGGeometryFrame;
namespace dom {
class SVGSVGElement;
} // namespace dom
} // namespace mozilla

struct nsSVGMark;

class nsSVGMarkerFrame final : public nsSVGContainerFrame
  friend class nsSVGMarkerAnonChildFrame;
  friend nsContainerFrame*
  NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  explicit nsSVGMarkerFrame(nsStyleContext* aContext)
    : nsSVGContainerFrame(aContext, mozilla::FrameType::SVGMarker)
    , mMarkedFrame(nullptr)
    , mInUse(false)
    , mInUse2(false)


  // nsIFrame interface:
#ifdef DEBUG
  virtual void Init(nsIContent*       aContent,
                    nsContainerFrame* aParent,
                    nsIFrame*         aPrevInFlow) override;

  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                const nsRect&           aDirtyRect,
                                const nsDisplayListSet& aLists) override {}

  virtual nsresult AttributeChanged(int32_t         aNameSpaceID,
                                    nsIAtom*        aAttribute,
                                    int32_t         aModType) override;

  virtual nsresult GetFrameName(nsAString& aResult) const override
    return MakeFrameName(NS_LITERAL_STRING("SVGMarker"), aResult);

  virtual nsContainerFrame* GetContentInsertionFrame() override {
    // Any children must be added to our single anonymous inner frame kid.
    MOZ_ASSERT(PrincipalChildList().FirstChild() &&
               "Where is our anonymous child?");
    return PrincipalChildList().FirstChild()->GetContentInsertionFrame();

  // nsSVGMarkerFrame methods:
  DrawResult PaintMark(gfxContext& aContext,
                      const gfxMatrix& aToMarkedFrameUserSpace,
                      mozilla::SVGGeometryFrame *aMarkedFrame,
                      nsSVGMark *aMark,
                      float aStrokeWidth,
                      uint32_t aFlags);

  SVGBBox GetMarkBBoxContribution(const Matrix &aToBBoxUserspace,
                                  uint32_t aFlags,
                                  mozilla::SVGGeometryFrame *aMarkedFrame,
                                  const nsSVGMark *aMark,
                                  float aStrokeWidth);

  // Update the style on our anonymous box child.
  void DoUpdateStyleOfOwnedAnonBoxes(mozilla::ServoStyleSet& aStyleSet,
                                     nsStyleChangeList& aChangeList,
                                     nsChangeHint aHintForThisFrame) override;

  // stuff needed for callback
  mozilla::SVGGeometryFrame *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
    AutoMarkerReferencer(nsSVGMarkerFrame *aFrame,
                         mozilla::SVGGeometryFrame *aMarkedFrame
    nsSVGMarkerFrame *mFrame;

  // 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 final : public nsSVGDisplayContainerFrame
  friend nsContainerFrame*
  NS_NewSVGMarkerAnonChildFrame(nsIPresShell* aPresShell,
                                nsStyleContext* aContext);

  explicit nsSVGMarkerAnonChildFrame(nsStyleContext* aContext)
    : nsSVGDisplayContainerFrame(aContext,


#ifdef DEBUG
  virtual void Init(nsIContent*       aContent,
                    nsContainerFrame* aParent,
                    nsIFrame*         aPrevInFlow) override;

  virtual nsresult GetFrameName(nsAString& aResult) const override {
    return MakeFrameName(NS_LITERAL_STRING("SVGMarkerAnonChild"), aResult);

  // nsSVGContainerFrame methods:
  virtual gfxMatrix GetCanvasTM() override
    return static_cast<nsSVGMarkerFrame*>(GetParent())->GetCanvasTM();