1 files changed, 119 insertions, 0 deletions
diff --git a/dom/svg/SVGAnimationElement.h b/dom/svg/SVGAnimationElement.h
new file mode 100644
index 0000000000..7f41d623fd
--- /dev/null
+++ b/dom/svg/SVGAnimationElement.h
@@ -0,0 +1,119 @@
+/* -*- 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_SVGANIMATIONELEMENT_H_
+#define DOM_SVG_SVGANIMATIONELEMENT_H_
+
+#include "mozilla/Attributes.h"
+#include "mozilla/SMILTimedElement.h"
+#include "mozilla/dom/IDTracker.h"
+#include "mozilla/dom/SVGElement.h"
+#include "mozilla/dom/SVGTests.h"
+
+namespace mozilla::dom {
+
+using SVGAnimationElementBase = SVGElement;
+
+class SVGAnimationElement : public SVGAnimationElementBase, public SVGTests {
+ protected:
+  explicit SVGAnimationElement(
+      already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
+  nsresult Init();
+  virtual ~SVGAnimationElement() = default;
+
+ public:
+  // interfaces:
+  NS_DECL_ISUPPORTS_INHERITED
+
+  NS_IMPL_FROMNODE_HELPER(SVGAnimationElement, IsSVGAnimationElement())
+
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SVGAnimationElement,
+                                           SVGAnimationElementBase)
+
+  bool IsSVGAnimationElement() const final { return true; }
+  nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override = 0;
+
+  // nsIContent specializations
+  nsresult BindToTree(BindContext&, nsINode& aParent) override;
+  void UnbindFromTree(bool aNullParent) override;
+
+  // Element specializations
+  bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
+                      const nsAString& aValue,
+                      nsIPrincipal* aMaybeScriptedPrincipal,
+                      nsAttrValue& aResult) override;
+  void AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
+                    const nsAttrValue* aValue, const nsAttrValue* aOldValue,
+                    nsIPrincipal* aSubjectPrincipal, bool aNotify) override;
+
+  Element* GetTargetElementContent();
+  virtual bool GetTargetAttributeName(int32_t* aNamespaceID,
+                                      nsAtom** aLocalName) const;
+  mozilla::SMILTimedElement& TimedElement();
+  mozilla::SMILTimeContainer* GetTimeContainer();
+  virtual SMILAnimationFunction& AnimationFunction() = 0;
+
+  bool IsEventAttributeNameInternal(nsAtom* aName) override;
+
+  // Utility methods for within SVG
+  void ActivateByHyperlink();
+
+  // WebIDL
+  SVGElement* GetTargetElement();
+  float GetStartTime(ErrorResult& rv);
+  float GetCurrentTimeAsFloat();
+  float GetSimpleDuration(ErrorResult& rv);
+  void BeginElement(ErrorResult& rv) { BeginElementAt(0.f, rv); }
+  void BeginElementAt(float offset, ErrorResult& rv);
+  void EndElement(ErrorResult& rv) { EndElementAt(0.f, rv); }
+  void EndElementAt(float offset, ErrorResult& rv);
+
+  // SVGTests
+  SVGElement* AsSVGElement() final { return this; }
+
+ protected:
+  // SVGElement overrides
+
+  void UpdateHrefTarget(const nsAString& aHrefStr);
+  void AnimationTargetChanged();
+
+  /**
+   * Helper that provides a reference to the element with the ID that is
+   * referenced by the animation element's 'href' attribute, if any, and that
+   * will notify the animation element if the element that that ID identifies
+   * changes to a different element (or none).  (If the 'href' attribute is not
+   * specified, then the animation target is the parent element and this helper
+   * is not used.)
+   */
+  class HrefTargetTracker final : public IDTracker {
+   public:
+    explicit HrefTargetTracker(SVGAnimationElement* aAnimationElement)
+        : mAnimationElement(aAnimationElement) {}
+
+   protected:
+    // We need to be notified when target changes, in order to request a
+    // sample (which will clear animation effects from old target and apply
+    // them to the new target) and update any event registrations.
+    void ElementChanged(Element* aFrom, Element* aTo) override {
+      IDTracker::ElementChanged(aFrom, aTo);
+      mAnimationElement->AnimationTargetChanged();
+    }
+
+    // We need to override IsPersistent to get persistent tracking (beyond the
+    // first time the target changes)
+    bool IsPersistent() override { return true; }
+
+   private:
+    SVGAnimationElement* const mAnimationElement;
+  };
+
+  HrefTargetTracker mHrefTarget;
+  mozilla::SMILTimedElement mTimedElement;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // DOM_SVG_SVGANIMATIONELEMENT_H_