backends/x11: Drop platform-specific event data

This is largely unused, for long probably. We want to avoid adding
platform data to events, so that's convenient.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1623>

src/backends/x11/meta-event-x11.c

@@ -30,28 +30,6 @@
 #include "clutter/clutter-mutter.h"
 #include "clutter/x11/clutter-x11.h"
 
-MetaEventX11 *
-meta_event_x11_new (void)
-{
-  return g_slice_new0 (MetaEventX11);
-}
-
-MetaEventX11 *
-meta_event_x11_copy (MetaEventX11 *event_x11)
-{
-  if (event_x11 != NULL)
-    return g_slice_dup (MetaEventX11, event_x11);
-
-  return NULL;
-}
-
-void
-meta_event_x11_free (MetaEventX11 *event_x11)
-{
-  if (event_x11 != NULL)
-    g_slice_free (MetaEventX11, event_x11);
-}
-
 /**
  * meta_x11_handle_event:
  * @xevent: pointer to XEvent structure
@@ -136,30 +114,6 @@ out:
   return result;
 }
 
-Time
-meta_x11_get_current_event_time (void)
-{
-  ClutterBackend *backend = clutter_get_default_backend ();
-
-  return CLUTTER_BACKEND_X11 (backend)->last_event_time;
-}
-
-gint
-meta_x11_event_get_key_group (const ClutterEvent *event)
-{
-  MetaEventX11 *event_x11;
-
-  g_return_val_if_fail (event != NULL, 0);
-  g_return_val_if_fail (event->type == CLUTTER_KEY_PRESS ||
-                        event->type == CLUTTER_KEY_RELEASE, 0);
-
-  event_x11 = _clutter_event_get_platform_data (event);
-  if (event_x11 == NULL)
-    return 0;
-
-  return event_x11->key_group;
-}
-
 guint
 meta_x11_event_sequence_get_touch_detail (const ClutterEventSequence *sequence)
 {

src/backends/x11/meta-event-x11.h

@@ -28,26 +28,6 @@
 
 #include "clutter/x11/clutter-x11.h"
 
-typedef struct _MetaEventX11         MetaEventX11;
-
-struct _MetaEventX11
-{
-  /* additional fields for Key events */
-  gint key_group;
-
-  guint key_is_modifier : 1;
-  guint num_lock_set    : 1;
-  guint caps_lock_set   : 1;
-};
-
-MetaEventX11 *       meta_event_x11_new          (void);
-MetaEventX11 *       meta_event_x11_copy         (MetaEventX11 *event_x11);
-void                 meta_event_x11_free         (MetaEventX11 *event_x11);
-
-Time  meta_x11_get_current_event_time (void);
-
-gint  meta_x11_event_get_key_group (const ClutterEvent *event);
-
 guint meta_x11_event_sequence_get_touch_detail (const ClutterEventSequence *sequence);
 
 ClutterX11FilterReturn meta_x11_handle_event (XEvent *xevent);

src/backends/x11/meta-seat-x11.c

@@ -1443,22 +1443,12 @@ meta_seat_x11_copy_event_data (ClutterSeat        *seat,
                                const ClutterEvent *src,
                                ClutterEvent       *dest)
 {
-  gpointer event_x11;
-
-  event_x11 = _clutter_event_get_platform_data (src);
-  if (event_x11 != NULL)
-    _clutter_event_set_platform_data (dest, meta_event_x11_copy (event_x11));
 }
 
 static void
 meta_seat_x11_free_event_data (ClutterSeat  *seat,
                                ClutterEvent *event)
 {
-  gpointer event_x11;
-
-  event_x11 = _clutter_event_get_platform_data (event);
-  if (event_x11 != NULL)
-    meta_event_x11_free (event_x11);
 }
 
 static ClutterVirtualInputDevice *
@@ -1803,7 +1793,6 @@ meta_seat_x11_translate_event (MetaSeatX11  *seat,
       {
         XIDeviceEvent *xev = (XIDeviceEvent *) xi_event;
         MetaKeymapX11 *keymap_x11 = seat->keymap;
-        MetaEventX11 *event_x11;
         char buffer[7] = { 0, };
         gunichar n;
 
@@ -1830,21 +1819,6 @@ meta_seat_x11_translate_event (MetaSeatX11  *seat,
                                                &event->key.modifier_state,
                                                NULL);
 
-        /* KeyEvents have platform specific data associated to them */
-        event_x11 = meta_event_x11_new ();
-        _clutter_event_set_platform_data (event, event_x11);
-
-        event_x11->key_group =
-          meta_keymap_x11_get_key_group (keymap_x11,
-                                         event->key.modifier_state);
-        event_x11->key_is_modifier =
-          meta_keymap_x11_get_is_modifier (keymap_x11,
-                                           event->key.hardware_keycode);
-        event_x11->num_lock_set =
-          clutter_keymap_get_num_lock_state (CLUTTER_KEYMAP (keymap_x11));
-        event_x11->caps_lock_set =
-          clutter_keymap_get_caps_lock_state (CLUTTER_KEYMAP (keymap_x11));
-
         clutter_event_set_source_device (event, source_device);
 
         device = g_hash_table_lookup (seat->devices_by_id,