1 files changed, 51 insertions, 0 deletions
diff --git a/gfx/layers/apz/src/WheelScrollAnimation.h b/gfx/layers/apz/src/WheelScrollAnimation.h
new file mode 100644
index 0000000000..79466c4456
--- /dev/null
+++ b/gfx/layers/apz/src/WheelScrollAnimation.h
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et 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_layers_WheelScrollAnimation_h_
+#define mozilla_layers_WheelScrollAnimation_h_
+
+#include "AsyncPanZoomAnimation.h"
+#include "AsyncScrollBase.h"
+#include "InputData.h"
+
+namespace mozilla {
+namespace layers {
+
+class AsyncPanZoomController;
+
+class WheelScrollAnimation
+  : public AsyncPanZoomAnimation,
+    public AsyncScrollBase
+{
+public:
+  WheelScrollAnimation(AsyncPanZoomController& aApzc,
+                       const nsPoint& aInitialPosition,
+                       ScrollWheelInput::ScrollDeltaType aDeltaType);
+
+  bool DoSample(FrameMetrics& aFrameMetrics, const TimeDuration& aDelta) override;
+  void Update(TimeStamp aTime, nsPoint aDelta, const nsSize& aCurrentVelocity);
+
+  WheelScrollAnimation* AsWheelScrollAnimation() override {
+    return this;
+  }
+
+  CSSPoint GetDestination() const {
+    return CSSPoint::FromAppUnits(mFinalDestination);
+  }
+
+private:
+  void InitPreferences(TimeStamp aTime);
+
+private:
+  AsyncPanZoomController& mApzc;
+  nsPoint mFinalDestination;
+  ScrollWheelInput::ScrollDeltaType mDeltaType;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif // mozilla_layers_WheelScrollAnimation_h_