[mutter/wip/carlosg/there-can-be-only-one: 146/151] backends/x11: Drop handling of XI_DeviceChange

[Carlos Garnacho <carlosg src gnome org>]

commit 9569d1aa8d85b45ae4aaa78d859096c6cbb1947c
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Jan 13 14:06:30 2022 +0100

    backends/x11: Drop handling of XI_DeviceChange
    
    Even though it's great that XI2 has an event to notify about device
    changes, this is something we can let the MetaBackend code handle
    consistently for all backends, since looking for the source device
    works everywhere.

 src/backends/x11/meta-backend-x11.c | 29 +----------------------------
 1 file changed, 1 insertion(+), 28 deletions(-)
---
diff --git a/src/backends/x11/meta-backend-x11.c b/src/backends/x11/meta-backend-x11.c
index d2bbab45e7..263d7d4689 100644
--- a/src/backends/x11/meta-backend-x11.c
+++ b/src/backends/x11/meta-backend-x11.c
@@ -249,30 +249,6 @@ translate_crossing_event (MetaBackendX11 *x11,
   meta_backend_x11_translate_crossing_event (x11, enter_event);
 }
 
-static void
-handle_device_change (MetaBackendX11 *x11,
-                      XIEvent        *event)
-{
-  XIDeviceChangedEvent *device_changed;
-  ClutterInputDevice *device;
-  ClutterBackend *backend;
-  ClutterSeat *seat;
-
-  if (event->evtype != XI_DeviceChanged)
-    return;
-
-  device_changed = (XIDeviceChangedEvent *) event;
-
-  if (device_changed->reason != XISlaveSwitch)
-    return;
-
-  backend = meta_backend_get_clutter_backend (META_BACKEND (x11));
-  seat = clutter_backend_get_default_seat (backend);
-  device = meta_seat_x11_lookup_device_id (META_SEAT_X11 (seat),
-                                           device_changed->sourceid);
-  meta_backend_update_last_device (META_BACKEND (x11), device);
-}
-
 /* Clutter makes the assumption that there is only one X window
  * per stage, which is a valid assumption to make for a generic
  * application toolkit. As such, it will ignore any events sent
@@ -321,10 +297,7 @@ handle_input_event (MetaBackendX11 *x11,
     {
       XIEvent *input_event = (XIEvent *) event->xcookie.data;
 
-      if (input_event->evtype == XI_DeviceChanged)
-        handle_device_change (x11, input_event);
-      else
-        maybe_spoof_event_as_stage_event (x11, input_event);
+      maybe_spoof_event_as_stage_event (x11, input_event);
     }
 }