[CRD iOS] Injecting scroll events w/ fling animation

remoting/client/ui/input_strategy.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_CLIENT_UI_INPUT_STRATEGY_H_
 #define REMOTING_CLIENT_UI_INPUT_STRATEGY_H_
 
 #include "remoting/client/ui/view_matrix.h"
 
 namespace remoting {
@@ skipping 29 matching lines @@
 
   // Called when a touch input (which will end up injecting a mouse event at
   // certain position in the host) is done at |touch_point|.
   // The implementation should move the cursor to proper position.
   virtual void TrackTouchInput(const ViewMatrix::Point& touch_point,
                                const DesktopViewport& viewport) = 0;
 
   // Returns the current cursor position.
   virtual ViewMatrix::Point GetCursorPosition() const = 0;
 
+  // Maps a scroll vector in the surface coordinate to the vector to be used to
+  // scroll the mouse wheel on the host.
+  virtual ViewMatrix::Vector2D MapScrollVector(

[nicholss, 2017/05/16 18:13:11]

I would expect this function to be MapXtoY style. Ie:
MapInputVectorToScrollVector  or something like this?

[Yuwei, 2017/05/17 05:42:20]

Done. Renamed to MapScreenVectorToDesktop

+      const ViewMatrix::Vector2D& delta,
+      const DesktopViewport& viewport) const = 0;
+
   // Returns the maximum radius of the feedback animation on the surface's
   // coordinate for the given input type. The feedback will then be shown on the
   // cursor positions returned by GetCursorPosition(). Return 0 if no feedback
   // should be shown.
   virtual float GetFeedbackRadius(InputFeedbackType type) const = 0;
 
   // Returns true if the input strategy maintains a visible cursor on the
   // desktop.
   virtual bool IsCursorVisible() const = 0;
 };
 
 }  // namespace remoting
 #endif  // REMOTING_CLIENT_UI_INPUT_STRATEGY_H_