1 files changed, 102 insertions, 0 deletions
diff --git a/dom/svg/SVGMotionSMILAnimationFunction.h b/dom/svg/SVGMotionSMILAnimationFunction.h
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+++ 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_