[mutter/wip/carlosg/no-event-source: 2/3] clutter: Rewrite clutter_event_[gs]et_source()

[Carlos Garnacho <carlosg src gnome org>]

commit 1f8bb109e4bd727e4a7b9468bf13ce7d0a7d521b
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 | 7 ++-----
 clutter/clutter/clutter-event.h | 4 ++--
 2 files changed, 4 insertions(+), 7 deletions(-)
---
diff --git a/clutter/clutter/clutter-event.c b/clutter/clutter/clutter-event.c
index 05cd7ba495..b1a5b6252f 100644
--- a/clutter/clutter/clutter-event.c
+++ b/clutter/clutter/clutter-event.c
@@ -541,7 +541,8 @@ clutter_event_get_source (const ClutterEvent *event)
 {
   g_return_val_if_fail (event != NULL, NULL);
 
-  return event->any.source;
+  return clutter_stage_get_event_actor (clutter_event_get_stage (event),
+                                        event);
 }
 
 /**
@@ -557,10 +558,6 @@ 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;
 }
 
 /**
diff --git a/clutter/clutter/clutter-event.h b/clutter/clutter/clutter-event.h
index 1378d91e0a..49b86247b7 100644
--- a/clutter/clutter/clutter-event.h
+++ b/clutter/clutter/clutter-event.h
@@ -716,10 +716,10 @@ void                    clutter_event_set_device_tool           (ClutterEvent
 CLUTTER_EXPORT
 ClutterInputDeviceTool *clutter_event_get_device_tool           (const ClutterEvent     *event);
 
-CLUTTER_EXPORT
+CLUTTER_DEPRECATED_FOR(clutter_stage_get_event_actor)
 void                    clutter_event_set_source                (ClutterEvent           *event,
                                                                  ClutterActor           *actor);
-CLUTTER_EXPORT
+CLUTTER_DEPRECATED
 ClutterActor *          clutter_event_get_source                (const ClutterEvent     *event);
 CLUTTER_EXPORT
 void                    clutter_event_set_stage                 (ClutterEvent           *event,