1 files changed, 57 insertions, 0 deletions
diff --git a/dom/svg/SVGMotionSMILAttr.h b/dom/svg/SVGMotionSMILAttr.h
new file mode 100644
index 0000000000..953aeed5b0
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+++ b/dom/svg/SVGMotionSMILAttr.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/. */
+
+/* representation of a dummy attribute targeted by <animateMotion> element */
+
+#ifndef DOM_SVG_SVGMOTIONSMILATTR_H_
+#define DOM_SVG_SVGMOTIONSMILATTR_H_
+
+#include "mozilla/Attributes.h"
+#include "mozilla/SMILAttr.h"
+
+class nsIContent;
+
+namespace mozilla {
+
+class SMILValue;
+
+namespace dom {
+class SVGAnimationElement;
+class SVGElement;
+}  // namespace dom
+
+/**
+ * SVGMotionSMILAttr: Implements the SMILAttr interface for SMIL animations
+ * from <animateMotion>.
+ *
+ * NOTE: Even though there's technically no "motion" attribute, we behave in
+ * many ways as if there were, for simplicity.
+ */
+class SVGMotionSMILAttr : public SMILAttr {
+ public:
+  explicit SVGMotionSMILAttr(dom::SVGElement* aSVGElement)
+      : mSVGElement(aSVGElement) {}
+
+  // SMILAttr methods
+  nsresult ValueFromString(const nsAString& aStr,
+                           const dom::SVGAnimationElement* aSrcElement,
+                           SMILValue& aValue,
+                           bool& aPreventCachingOfSandwich) const override;
+  SMILValue GetBaseValue() const override;
+  nsresult SetAnimValue(const SMILValue& aValue) override;
+  void ClearAnimValue() override;
+  const nsIContent* GetTargetNode() const override;
+
+ protected:
+  // Raw pointers are OK here because this SVGMotionSMILAttr is both
+  // created & destroyed during a SMIL sample-step, during which time the DOM
+  // isn't modified.
+  dom::SVGElement* mSVGElement;
+};
+
+}  // namespace mozilla
+
+#endif  // DOM_SVG_SVGMOTIONSMILATTR_H_