From 85bbd82ae847eed0bba943c119a356d9493f7da2 Mon Sep 17 00:00:00 2001
From: Olivier Fourdan <ofourdan@redhat.com>
Date: Wed, 4 Apr 2018 10:10:32 +0200
Subject: [PATCH] window-actor: add new signal "effects-completed"

When using plugins, the effects will affect the MetaWindowActor size
and position.

Add a new signal "effects-completed" wired to the corresponding
MetaWindowActor which is emitted when all effects are completed so that
derived objects can be notified when all effects are completed and use
the actual size and position.

Closes: https://gitlab.gnome.org/GNOME/mutter/issues/104
---
 src/compositor/meta-window-actor-private.h |  1 +
 src/compositor/meta-window-actor.c         | 24 ++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/src/compositor/meta-window-actor-private.h b/src/compositor/meta-window-actor-private.h
index 6b52ef5b5..ce5e7eadc 100644
--- a/src/compositor/meta-window-actor-private.h
+++ b/src/compositor/meta-window-actor-private.h
@@ -58,5 +58,6 @@ void meta_window_actor_effect_completed (MetaWindowActor  *actor,
 
 MetaSurfaceActor *meta_window_actor_get_surface (MetaWindowActor *self);
 void meta_window_actor_update_surface (MetaWindowActor *self);
+MetaWindowActor *meta_window_actor_from_window (MetaWindow *window);
 
 #endif /* META_WINDOW_ACTOR_PRIVATE_H */
diff --git a/src/compositor/meta-window-actor.c b/src/compositor/meta-window-actor.c
index c67b2b7b0..5078624cc 100644
--- a/src/compositor/meta-window-actor.c
+++ b/src/compositor/meta-window-actor.c
@@ -142,6 +142,8 @@ struct _FrameData
 enum
 {
   FIRST_FRAME,
+  EFFECTS_COMPLETED,
+
   LAST_SIGNAL
 };
 
@@ -238,6 +240,21 @@ meta_window_actor_class_init (MetaWindowActorClass *klass)
                   NULL, NULL, NULL,
                   G_TYPE_NONE, 0);
 
+  /**
+   * MetaWindowActor::effects-completed:
+   * @actor: the #MetaWindowActor instance
+   *
+   * The ::effects-completed signal will be emitted once all pending compositor
+   * effects are completed.
+   */
+  signals[EFFECTS_COMPLETED] =
+    g_signal_new ("effects-completed",
+                  G_TYPE_FROM_CLASS (object_class),
+                  G_SIGNAL_RUN_LAST,
+                  0,
+                  NULL, NULL, NULL,
+                  G_TYPE_NONE, 0);
+
   pspec = g_param_spec_object ("meta-window",
                                "MetaWindow",
                                "The displayed MetaWindow",
@@ -1131,6 +1148,7 @@ meta_window_actor_after_effects (MetaWindowActor *self)
       return;
     }
 
+  g_signal_emit (self, signals[EFFECTS_COMPLETED], 0);
   meta_window_actor_sync_visibility (self);
   meta_window_actor_sync_actor_geometry (self, FALSE);
 }
@@ -2157,3 +2175,9 @@ meta_window_actor_sync_updates_frozen (MetaWindowActor *self)
 
   meta_window_actor_set_updates_frozen (self, meta_window_updates_are_frozen (window));
 }
+
+MetaWindowActor *
+meta_window_actor_from_window (MetaWindow *window)
+{
+  return META_WINDOW_ACTOR (meta_window_get_compositor_private (window));
+}