[CRD iOS] Inject mouse events to the host

remoting/client/desktop_viewport.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_DESKTOP_VIEWPORT_H_
 #define REMOTING_CLIENT_DESKTOP_VIEWPORT_H_
 
 #include "base/callback.h"
 #include "remoting/client/view_matrix.h"
 
@@ skipping 30 matching lines @@
   // Sets the |surface_size_| and initializes the viewport when necessary.
   void SetSurfaceSize(int surface_width, int surface_height);
 
   // Translates the desktop on the surface's reference frame by <dx, dy>.
   void MoveDesktop(float dx, float dy);
 
   // Scales the desktop on the surface's reference frame at pivot point (px, py)
   // by |scale|.
   void ScaleDesktop(float px, float py, float scale);
 
+  // Moves the viewport center by <x, y> on the desktop's coordinate.
+  void MoveViewportCenter(float dx, float dy);

[nicholss, 2017/05/08 15:34:18]

I don't think "center" matters here, this method sounds more like
"translateViewport" with dx, dy. all pixels will be translated by the same
amount.

[Yuwei, 2017/05/08 20:45:26]

Done. Also renamed MoveViewportcenterWithoutUpdate

+
   // Sets the viewport center to (x, y) on the desktop's coordinate.
   void SetViewportCenter(float x, float y);
 
   // Registers the callback to be called once the transformation has changed.
   // run_immediately: If true and the viewport is ready to be used, the callback
   //     will be called immedately with the transformation matrix.
   void RegisterOnTransformationChangedCallback(
       const TransformationCallback& callback,
       bool run_immediately);
 
+  // Returns the reference to the desktop-to-surface transformation.
+  const ViewMatrix& GetTransformation() const;
+
  private:
   struct Bounds {
     float left;
     float right;
     float top;
     float bottom;
   };
 
   // Resizes the desktop such that the image is displayed without borders in
   // minimum possible zoom-level. This will be called once both the desktop
@@ skipping 34 matching lines @@
 
   TransformationCallback on_transformation_changed_;
 
   // DesktopViewport is neither copyable nor movable.
   DesktopViewport(const DesktopViewport&) = delete;
   DesktopViewport& operator=(const DesktopViewport&) = delete;
 };
 
 }  // namespace remoting
 #endif  // REMOTING_CLIENT_DESKTOP_VIEWPORT_H_