wayland: Update keyboard state unconditionally

In particular we need to know about all key events to keep the xkb
state reliable even if the event is then consumed by a global shortcut
or grab and never reaches any wayland client.

We also need to keep track of all pressed keys at all times so that we
can send an updated set or pressed keys to the focused client when a
grab ends.

https://bugzilla.gnome.org/show_bug.cgi?id=722847

src/wayland/meta-wayland.c

@@ -508,6 +508,15 @@ stage_destroy_cb (void)
   meta_quit (META_EXIT_SUCCESS);
 }
 
+/**
+ * meta_wayland_compositor_update:
+ * @compositor: the #MetaWaylandCompositor instance
+ * @event: the #ClutterEvent used to update @seat's state
+ *
+ * This is used to update display server state like updating cursor
+ * position and keeping track of buttons and keys pressed. It must be
+ * called for all input events coming from the underlying devices.
+ */
 void
 meta_wayland_compositor_update (MetaWaylandCompositor *compositor,
                                 const ClutterEvent    *event)
@@ -536,18 +545,18 @@ meta_wayland_compositor_update (MetaWaylandCompositor *compositor,
       meta_idle_monitor_reset_idletime (device_monitor);
     }
 
-  switch (event->type)
-    {
-    case CLUTTER_MOTION:
-    case CLUTTER_BUTTON_PRESS:
-    case CLUTTER_BUTTON_RELEASE:
-    case CLUTTER_SCROLL:
-      meta_wayland_seat_update_pointer (compositor->seat, event);
-    default:
-      break;
-    }
+  meta_wayland_seat_update (compositor->seat, event);
 }
 
+/**
+ * meta_wayland_compositor_handle_event:
+ * @compositor: the #MetaWaylandCompositor instance
+ * @event: the #ClutterEvent to be sent
+ *
+ * This method sends events to the focused wayland client, if any.
+ *
+ * Return value: whether @event was sent to a wayland client.
+ */
 gboolean
 meta_wayland_compositor_handle_event (MetaWaylandCompositor *compositor,
                                       const ClutterEvent    *event)