1 files changed, 105 insertions, 0 deletions
diff --git a/dom/svg/SVGMotionSMILAnimationFunction.h b/dom/svg/SVGMotionSMILAnimationFunction.h
new file mode 100644
index 000000000..a9855b372
--- /dev/null
+++ b/dom/svg/SVGMotionSMILAnimationFunction.h
@@ -0,0 +1,105 @@
+/* -*- 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 MOZILLA_SVGMOTIONSMILANIMATIONFUNCTION_H_
+#define MOZILLA_SVGMOTIONSMILANIMATIONFUNCTION_H_
+
+#include "mozilla/gfx/2D.h"
+#include "mozilla/RefPtr.h"
+#include "nsSMILAnimationFunction.h"
+#include "nsTArray.h"
+#include "SVGMotionSMILType.h"  // for RotateType
+
+class nsAttrValue;
+class nsIAtom;
+class nsIContent;
+class nsISMILAttr;
+class nsSMILValue;
+
+namespace mozilla {
+
+namespace dom {
+class SVGMPathElement;
+} // namespace dom
+
+//----------------------------------------------------------------------
+// SVGMotionSMILAnimationFunction
+//
+// Subclass of nsSMILAnimationFunction to support a few extra features offered
+// by the <animateMotion> element.
+//
+class SVGMotionSMILAnimationFunction final : public nsSMILAnimationFunction
+{
+  typedef mozilla::gfx::Path Path;
+
+public:
+  SVGMotionSMILAnimationFunction();
+  virtual bool SetAttr(nsIAtom* aAttribute,
+                       const nsAString& aValue,
+                       nsAttrValue& aResult,
+                       nsresult* aParseResult = nullptr) override;
+  virtual bool UnsetAttr(nsIAtom* 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
+  };
+
+  virtual nsSMILCalcMode GetCalcMode() const override;
+  virtual nsresult GetValues(const nsISMILAttr& aSMILAttr,
+                             nsSMILValueArray& aResult) override;
+  virtual void CheckValueListDependentAttrs(uint32_t aNumValues) override;
+
+  virtual 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(nsIAtom* aAttribute);
+  void     RebuildPathAndVertices(const nsIContent* aContextElem);
+  void     RebuildPathAndVerticesFromMpathElem(dom::SVGMPathElement* aMpathElem);
+  void     RebuildPathAndVerticesFromPathAttr();
+  void     RebuildPathAndVerticesFromBasicAttrs(const nsIContent* aContextElem);
+  bool     GenerateValuesForPathAndPoints(Path* aPath,
+                                          bool aIsKeyPoints,
+                                          FallibleTArray<double>& aPointDistances,
+                                          nsSMILValueArray& 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 // MOZILLA_SVGMOTIONSMILANIMATIONFUNCTION_H_