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compositor: reset top_window_actor and remove it from windows when destroyed

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When the top window actor is destroyed, we need to make sure that
all its references are removed or it could be picked again in next
windows sync, causing crashes.
Since the window might or might not be destroyed when removed (depending
weather animations are in progress over it or not), it's just safer
to wait it to be destroyed before cleaning up any of its reference.

https://bugzilla.gnome.org/show_bug.cgi?id=791006
This commit is contained in:
Marco Trevisan (Treviño) 2017-11-29 18:05:27 -05:00
parent 93e450f37c
commit b1587f0716
1 changed files with 20 additions and 3 deletions
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23
src/compositor/compositor.c
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@ -674,9 +674,6 @@ meta_compositor_remove_window (MetaCompositor *compositor,
if (compositor->unredirected_window == window)
set_unredirected_window (compositor, NULL);
if (compositor->top_window_actor == window_actor)
compositor->top_window_actor = NULL;
meta_window_actor_destroy (window_actor);
}
@ -955,6 +952,16 @@ get_top_visible_window_actor (MetaCompositor *compositor)
return NULL;
}
static void
on_top_window_actor_destroyed (MetaWindowActor *window_actor,
MetaCompositor *compositor)
{
compositor->top_window_actor = NULL;
compositor->windows = g_list_remove (compositor->windows, window_actor);
meta_stack_tracker_queue_sync_stack (compositor->display->screen->stack_tracker);
}
void
meta_compositor_sync_stack (MetaCompositor *compositor,
GList *stack)
@ -1042,7 +1049,17 @@ meta_compositor_sync_stack (MetaCompositor *compositor,
sync_actor_stacking (compositor);
if (compositor->top_window_actor)
g_signal_handlers_disconnect_by_func (compositor->top_window_actor,
on_top_window_actor_destroyed,
compositor);
compositor->top_window_actor = get_top_visible_window_actor (compositor);
if (compositor->top_window_actor)
g_signal_connect (compositor->top_window_actor, "destroy",
G_CALLBACK (on_top_window_actor_destroyed),
compositor);
}
void