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diff --git a/dom/svg/SVGMotionSMILAnimationFunction.h b/dom/svg/SVGMotionSMILAnimationFunction.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 DOM_SVG_SVGMOTIONSMILANIMATIONFUNCTION_H_
+#define DOM_SVG_SVGMOTIONSMILANIMATIONFUNCTION_H_
+
+#include "mozilla/gfx/2D.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/SMILAnimationFunction.h"
+#include "SVGMotionSMILType.h"
+#include "nsTArray.h"
+
+class nsAttrValue;
+class nsAtom;
+class nsIContent;
+
+namespace mozilla {
+
+class SMILAttr;
+class SMILValue;
+
+namespace dom {
+class SVGMPathElement;
+} // namespace dom
+
+//----------------------------------------------------------------------
+// SVGMotionSMILAnimationFunction
+//
+// Subclass of SMILAnimationFunction to support a few extra features offered
+// by the <animateMotion> element.
+//
+class SVGMotionSMILAnimationFunction final : public SMILAnimationFunction {
+ using Path = mozilla::gfx::Path;
+
+ public:
+ SVGMotionSMILAnimationFunction();
+ bool SetAttr(nsAtom* aAttribute, const nsAString& aValue,
+ nsAttrValue& aResult, nsresult* aParseResult = nullptr) override;
+ bool UnsetAttr(nsAtom* aAttribute) override;
+
+ // Method to allow our owner-element to signal us when our <mpath>
+ // has changed or been added/removed. When that happens, we need to
+ // mark ourselves as changed so we'll get recomposed, and mark our path data
+ // as stale so it'll get regenerated (regardless of mPathSourceType, since
+ // <mpath> trumps all the other sources of path data)
+ void MpathChanged() { mIsPathStale = mHasChanged = true; }
+
+ protected:
+ enum PathSourceType {
+ // NOTE: Ordering matters here. Higher-priority path-descriptors should
+ // have higher enumerated values
+ ePathSourceType_None, // uninitialized or not applicable
+ ePathSourceType_ByAttr, // by or from-by animation
+ ePathSourceType_ToAttr, // to or from-to animation
+ ePathSourceType_ValuesAttr,
+ ePathSourceType_PathAttr,
+ ePathSourceType_Mpath
+ };
+
+ SMILCalcMode GetCalcMode() const override;
+ virtual nsresult GetValues(const SMILAttr& aSMILAttr,
+ SMILValueArray& aResult) override;
+ void CheckValueListDependentAttrs(uint32_t aNumValues) override;
+
+ bool IsToAnimation() const override;
+
+ void CheckKeyPoints();
+ nsresult SetKeyPoints(const nsAString& aKeyPoints, nsAttrValue& aResult);
+ void UnsetKeyPoints();
+ nsresult SetRotate(const nsAString& aRotate, nsAttrValue& aResult);
+ void UnsetRotate();
+
+ // Helpers for GetValues
+ void MarkStaleIfAttributeAffectsPath(nsAtom* aAttribute);
+ void RebuildPathAndVertices(const nsIContent* aTargetElement);
+ void RebuildPathAndVerticesFromMpathElem(dom::SVGMPathElement* aMpathElem);
+ void RebuildPathAndVerticesFromPathAttr();
+ void RebuildPathAndVerticesFromBasicAttrs(const nsIContent* aContextElem);
+ bool GenerateValuesForPathAndPoints(Path* aPath, bool aIsKeyPoints,
+ FallibleTArray<double>& aPointDistances,
+ SMILValueArray& aResult);
+
+ // Members
+ // -------
+ FallibleTArray<double> mKeyPoints; // parsed from "keyPoints" attribute.
+
+ RotateType mRotateType; // auto, auto-reverse, or explicit.
+ float mRotateAngle; // the angle value, if explicit.
+
+ PathSourceType mPathSourceType; // source of our Path.
+ RefPtr<Path> mPath; // representation of motion path.
+ FallibleTArray<double> mPathVertices; // distances of vertices along path.
+
+ bool mIsPathStale;
+};
+
+} // namespace mozilla
+
+#endif // DOM_SVG_SVGMOTIONSMILANIMATIONFUNCTION_H_