1 files changed, 61 insertions, 0 deletions
diff --git a/gfx/layers/apz/src/AndroidAPZ.h b/gfx/layers/apz/src/AndroidAPZ.h
new file mode 100644
index 0000000000..404892da5e
--- /dev/null
+++ b/gfx/layers/apz/src/AndroidAPZ.h
@@ -0,0 +1,61 @@
+/* -*- 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_AndroidAPZ_h_
+#define mozilla_layers_AndroidAPZ_h_
+
+#include "AsyncPanZoomAnimation.h"
+#include "AsyncPanZoomController.h"
+#include "GeneratedJNIWrappers.h"
+
+namespace mozilla {
+namespace layers {
+
+class AndroidSpecificState : public PlatformSpecificStateBase {
+public:
+  AndroidSpecificState();
+
+  virtual AndroidSpecificState* AsAndroidSpecificState() override {
+    return this;
+  }
+
+  java::StackScroller::GlobalRef mOverScroller;
+  TimeStamp mLastFling;
+};
+
+class AndroidFlingAnimation: public AsyncPanZoomAnimation {
+public:
+  AndroidFlingAnimation(AsyncPanZoomController& aApzc,
+                        PlatformSpecificStateBase* aPlatformSpecificState,
+                        const RefPtr<const OverscrollHandoffChain>& aOverscrollHandoffChain,
+                        bool aFlingIsHandoff /* ignored */,
+                        const RefPtr<const AsyncPanZoomController>& aScrolledApzc);
+  virtual bool DoSample(FrameMetrics& aFrameMetrics,
+                        const TimeDuration& aDelta) override;
+private:
+  void DeferHandleFlingOverscroll(ParentLayerPoint& aVelocity);
+  // Returns true if value is on or outside of axis bounds.
+  bool CheckBounds(Axis& aAxis, float aValue, float aDirection, float* aClamped);
+
+  AsyncPanZoomController& mApzc;
+  java::StackScroller::GlobalRef mOverScroller;
+  RefPtr<const OverscrollHandoffChain> mOverscrollHandoffChain;
+  RefPtr<const AsyncPanZoomController> mScrolledApzc;
+  bool mSentBounceX;
+  bool mSentBounceY;
+  long mFlingDuration;
+  ParentLayerPoint mStartOffset;
+  ParentLayerPoint mPreviousOffset;
+  // Unit vector in the direction of the fling.
+  ParentLayerPoint mFlingDirection;
+  ParentLayerPoint mPreviousVelocity;
+};
+
+
+} // namespace layers
+} // namespace mozilla
+
+#endif // mozilla_layers_AndroidAPZ_h_