[mutter] clutter: Also filter relative tablet tool motions

[Carlos Garnacho <carlosg src gnome org>]

commit df45c50d0b9431f9ad7f7fe1450cf78dd3801924
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Feb 3 13:10:50 2017 +0800

    clutter: Also filter relative tablet tool motions
    
    Pass the relative motion from tablet tools through the same filter
    mechanism as used for the relative pointer motions.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=778119

 .../clutter/evdev/clutter-device-manager-evdev.c   |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/clutter/clutter/evdev/clutter-device-manager-evdev.c 
b/clutter/clutter/evdev/clutter-device-manager-evdev.c
index e3269b9..c3fdc90 100644
--- a/clutter/clutter/evdev/clutter-device-manager-evdev.c
+++ b/clutter/clutter/evdev/clutter-device-manager-evdev.c
@@ -377,11 +377,23 @@ notify_relative_tool_motion (ClutterInputDevice *input_device,
                              gfloat              dy,
                              gdouble            *axes)
 {
+  ClutterInputDeviceEvdev *device_evdev;
   ClutterEvent *event;
+  ClutterSeatEvdev *seat;
   gfloat x, y;
 
+  device_evdev = CLUTTER_INPUT_DEVICE_EVDEV (input_device);
+  seat = _clutter_input_device_evdev_get_seat (device_evdev);
   x = input_device->current_x + dx;
   y = input_device->current_y + dy;
+
+  _clutter_device_manager_evdev_filter_relative_motion (seat->manager_evdev,
+                                                        input_device,
+                                                        seat->pointer_x,
+                                                        seat->pointer_y,
+                                                        &dx,
+                                                        &dy);
+
   event = new_absolute_motion_event (input_device, time_us, x, y, axes);
   _clutter_evdev_event_set_relative_motion (event, dx, dy, 0, 0);