1 files changed, 48 insertions, 0 deletions
diff --git a/gfx/layers/apz/src/SmoothScrollAnimation.h b/gfx/layers/apz/src/SmoothScrollAnimation.h
new file mode 100644
index 0000000000..8096875a51
--- /dev/null
+++ b/gfx/layers/apz/src/SmoothScrollAnimation.h
@@ -0,0 +1,48 @@
+/* -*- 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_layers_SmoothScrollAnimation_h_
+#define mozilla_layers_SmoothScrollAnimation_h_
+
+#include "GenericScrollAnimation.h"
+#include "ScrollPositionUpdate.h"
+#include "mozilla/ScrollOrigin.h"
+#include "mozilla/layers/KeyboardScrollAction.h"
+
+namespace mozilla {
+namespace layers {
+
+class AsyncPanZoomController;
+
+class SmoothScrollAnimation : public GenericScrollAnimation {
+ public:
+  SmoothScrollAnimation(AsyncPanZoomController& aApzc,
+                        const nsPoint& aInitialPosition, ScrollOrigin aOrigin);
+
+  void UpdateDestinationAndSnapTargets(
+      TimeStamp aTime, const nsPoint& aDestination,
+      const nsSize& aCurrentVelocity, ScrollSnapTargetIds&& aSnapTargetIds,
+      ScrollTriggeredByScript aTriggeredByScript);
+
+  SmoothScrollAnimation* AsSmoothScrollAnimation() override;
+  bool WasTriggeredByScript() const override {
+    return mTriggeredByScript == ScrollTriggeredByScript::Yes;
+  }
+  ScrollSnapTargetIds TakeSnapTargetIds() { return std::move(mSnapTargetIds); }
+  ScrollOrigin GetScrollOrigin() const;
+  static ScrollOrigin GetScrollOriginForAction(
+      KeyboardScrollAction::KeyboardScrollActionType aAction);
+
+ private:
+  ScrollOrigin mOrigin;
+  ScrollSnapTargetIds mSnapTargetIds;
+  ScrollTriggeredByScript mTriggeredByScript;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif  // mozilla_layers_SmoothScrollAnimation_h_