[gnome-shell/wip/carlosg/no-event-source: 1/8] grabHelper: Query stage for target actor instead of event.get_source()

[Carlos Garnacho <carlosg src gnome org>]

commit a30e71ec237fb963f4f0b34da104a27af4b802d4
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Feb 25 13:07:49 2022 +0100

    grabHelper: Query stage for target actor instead of event.get_source()
    
    Events are going to stop containing the destinatary, so stop using this
    API. Querying the stage is equivalent and ensured to be up-to-date.

 js/ui/grabHelper.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/grabHelper.js b/js/ui/grabHelper.js
index a46bab0fa9..af4641014a 100644
--- a/js/ui/grabHelper.js
+++ b/js/ui/grabHelper.js
@@ -265,9 +265,11 @@ var GrabHelper = class GrabHelper {
             return Clutter.EVENT_PROPAGATE;
         }
 
+        const targetActor = global.stage.get_event_actor(event);
+
         if (type === Clutter.EventType.ENTER ||
             type === Clutter.EventType.LEAVE ||
-            this.currentGrab.actor.contains(event.get_source()))
+            this.currentGrab.actor.contains(targetActor))
             return Clutter.EVENT_PROPAGATE;
 
         if (Main.keyboard.shouldTakeEvent(event))
@@ -279,7 +281,7 @@ var GrabHelper = class GrabHelper {
             if (press || touchBegin)
                 this._ignoreUntilRelease = true;
 
-            let i = this._actorInGrabStack(event.get_source()) + 1;
+            let i = this._actorInGrabStack(targetActor) + 1;
             this.ungrab({ actor: this._grabStack[i].actor, isUser: true });
             return Clutter.EVENT_STOP;
         }