import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/svg/nsSVGMarkerFrame.h

@@ -0,0 +1,174 @@
+/* -*- 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 nsRect&           aDirtyRect,
+                                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