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-rw-r--r--layout/svg/SVGMarkerFrame.h164
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diff --git a/layout/svg/SVGMarkerFrame.h b/layout/svg/SVGMarkerFrame.h
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+/* -*- 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
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#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);
+ }
+
+ 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_