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wayland/subsurface: Avoid placement ops for detached subsurfaces

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If a subsurface first gets reordered and afterwards detached from
the parent before the parent surface got commited, we currently
would end up reattaching the subsurface to its previous parent.

While clients should avoid this behaviour, it's legit according
to the spec.

We already prevent similar cases where the subsurface is destroyed -
extend that check to detaching, which includes the destroy case.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1831>
This commit is contained in:
Robert Mader 2021-04-16 19:38:40 +02:00 committed by Marge Bot
parent f7768874e5
commit 6e00e5e6e7
2 changed files with 9 additions and 9 deletions
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16
src/wayland/meta-wayland-subsurface.c
View file

@ -355,11 +355,11 @@ is_valid_sibling (MetaWaylandSurface *surface,
}
static void
subsurface_handle_pending_surface_destroyed (struct wl_listener *listener,
void *data)
subsurface_handle_pending_subsurface_destroyed (struct wl_listener *listener,
void *data)
{
MetaWaylandSubsurfacePlacementOp *op =
wl_container_of (listener, op, surface_destroy_listener);
wl_container_of (listener, op, subsurface_destroy_listener);
op->surface = NULL;
}
@ -378,7 +378,7 @@ void
meta_wayland_subsurface_placement_op_free (MetaWaylandSubsurfacePlacementOp *op)
{
if (op->surface)
wl_list_remove (&op->surface_destroy_listener.link);
wl_list_remove (&op->subsurface_destroy_listener.link);
if (op->sibling)
wl_list_remove (&op->sibling_destroy_listener.link);
g_free (op);
@ -396,12 +396,12 @@ queue_subsurface_placement (MetaWaylandSurface *surface,
op->placement = placement;
op->surface = surface;
op->sibling = sibling;
op->surface_destroy_listener.notify =
subsurface_handle_pending_surface_destroyed;
op->subsurface_destroy_listener.notify =
subsurface_handle_pending_subsurface_destroyed;
op->sibling_destroy_listener.notify =
subsurface_handle_pending_sibling_destroyed;
wl_resource_add_destroy_listener (surface->resource,
&op->surface_destroy_listener);
wl_resource_add_destroy_listener (surface->wl_subsurface,
&op->subsurface_destroy_listener);
wl_resource_add_destroy_listener (sibling->resource,
&op->sibling_destroy_listener);

2
src/wayland/meta-wayland-subsurface.h
View file

@ -40,7 +40,7 @@ typedef struct
MetaWaylandSubsurfacePlacement placement;
MetaWaylandSurface *surface;
MetaWaylandSurface *sibling;
struct wl_listener surface_destroy_listener;
struct wl_listener subsurface_destroy_listener;
struct wl_listener sibling_destroy_listener;
} MetaWaylandSubsurfacePlacementOp;