[mutter/wip/carlosg/no-event-source: 1/2] clutter: Rewrite clutter_event_[gs]et_source()

[Carlos Garnacho <carlosg src gnome org>]

commit f557e127578deeddbcbb929485aa1df6b7eba89f
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Feb 25 16:15:43 2022 +0100

    clutter: Rewrite clutter_event_[gs]et_source()
    
    It does not make sense that the event "source" (aka the target) is
    both content and recipient of a message. Not doing so, events become
    largely independent of the actor that is receiving/handling an
    event. This is small step toward making events opaque and immutable.
    
    Every user of these API calls in our code have ported away from
    them, but other users may remain in extensions, so make these
    functions work on top of the alternative API without accessing the
    soon to be removed event field.

 clutter/clutter/clutter-event.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)
---
diff --git a/clutter/clutter/clutter-event.c b/clutter/clutter/clutter-event.c
index 05cd7ba495..72bf04e769 100644
--- a/clutter/clutter/clutter-event.c
+++ b/clutter/clutter/clutter-event.c
@@ -539,9 +539,15 @@ clutter_event_set_coords (ClutterEvent *event,
 ClutterActor *
 clutter_event_get_source (const ClutterEvent *event)
 {
+  ClutterActor *source;
+
   g_return_val_if_fail (event != NULL, NULL);
 
-  return event->any.source;
+  source =
+    clutter_stage_get_device_actor (clutter_event_get_stage (event),
+                                    clutter_event_get_device (event),
+                                    clutter_event_get_event_sequence (event));
+  return source;
 }
 
 /**
@@ -557,10 +563,6 @@ void
 clutter_event_set_source (ClutterEvent *event,
                           ClutterActor *actor)
 {
-  g_return_if_fail (event != NULL);
-  g_return_if_fail (actor == NULL || CLUTTER_IS_ACTOR (actor));
-
-  event->any.source = actor;
 }
 
 /**