Remote assistance on Chrome OS Part IX - Input injection on Ozone

remoting/host/client_session.h

 // Copyright (c) 2012 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_HOST_CLIENT_SESSION_H_
 #define REMOTING_HOST_CLIENT_SESSION_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 164 matching lines @@
 
   // Filter used as the final element in the input pipeline.
   protocol::InputFilter host_input_filter_;
 
   // Tracker used to release pressed keys and buttons when disconnecting.
   protocol::InputEventTracker input_tracker_;
 
   // Filter used to disable remote inputs during local input activity.
   RemoteInputFilter remote_input_filter_;
 
+  // Filter used to transform the input co-ordinates of mouse events based on
+  // the host display rotation settings.  This must be applied before the
+  // |remote_input_filter| so that the local mouse movements matches the

[Wez, 2014/11/26 02:28:34]

nit: "... the coordinate system of injected events matches those returned by the
local input monitor"?

[kelvinp, 2014/12/02 00:12:26]

Done.

+  // injected movements.
+  scoped_ptr<protocol::InputFilter> display_rotation_filter_;
+
   // Filter used to clamp mouse events to the current display dimensions.
   MouseClampingFilter mouse_clamping_filter_;
 
   // Filter to used to stop clipboard items sent from the client being echoed
   // back to it.  It is the final element in the clipboard (client -> host)
   // pipeline.
   protocol::ClipboardEchoFilter clipboard_echo_filter_;
 
   // Filters used to manage enabling & disabling of input & clipboard.
   protocol::InputFilter disable_input_filter_;
@@ skipping 61 matching lines @@
   // Used to disable callbacks to |this| once DisconnectSession() has been
   // called.
   base::WeakPtrFactory<ClientSessionControl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientSession);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_CLIENT_SESSION_H_