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wayland: Save session state in the background in a delayed manner

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Track toplevels being saved, and save state some time after. This
will make session state somewhat remembered on shell crashes, as
long as there was time to snapshot the data in disk.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3825>
This commit is contained in:
Carlos Garnacho 2024-07-29 11:54:27 +02:00 committed by Marge Bot
parent 8b9bf6b051
commit 69b6e7ead6
1 changed files with 36 additions and 0 deletions
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36
src/wayland/meta-wayland-xdg-session-manager.c
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@ -30,6 +30,8 @@
#include "session-management-v1-server-protocol.h"
#define TIMEOUT_DELAY_SECONDS 3
typedef struct _MetaWaylandXdgSessionManager
{
MetaWaylandCompositor *compositor;
@ -37,6 +39,7 @@ typedef struct _MetaWaylandXdgSessionManager
GHashTable *sessions;
GHashTable *session_states;
guint save_timeout_id;
} MetaWaylandXdgSessionManager;
static void xdg_session_manager_remove_session (MetaWaylandXdgSessionManager *session_manager,
@ -85,6 +88,31 @@ on_restore_toplevel (MetaWaylandXdgSession *session,
return TRUE;
}
static void
save_async_cb (GObject *source,
GAsyncResult *res,
gpointer user_data)
{
MetaSessionManager *manager = META_SESSION_MANAGER (source);
g_autoptr (GError) error = NULL;
if (!meta_session_manager_save_finish (manager, res, &error))
g_message ("Could not save session data: %s", error->message);
}
static void
on_save_idle_cb (gpointer user_data)
{
MetaWaylandXdgSessionManager *xdg_session_manager = user_data;
MetaContext *context =
meta_wayland_compositor_get_context (xdg_session_manager->compositor);
MetaSessionManager *session_manager =
meta_context_get_session_manager (context);
meta_session_manager_save (session_manager, save_async_cb, xdg_session_manager);
xdg_session_manager->save_timeout_id = 0;
}
static void
on_save_toplevel (MetaWaylandXdgSession *session,
MetaWaylandXdgToplevel *xdg_toplevel,
@ -104,6 +132,13 @@ on_save_toplevel (MetaWaylandXdgSession *session,
meta_wayland_xdg_session_get_id (session));
meta_session_state_save_window (session_state, name, window);
if (xdg_session_manager->save_timeout_id == 0)
{
xdg_session_manager->save_timeout_id =
g_timeout_add_seconds_once (TIMEOUT_DELAY_SECONDS, on_save_idle_cb,
xdg_session_manager);
}
}
static void
@ -354,6 +389,7 @@ meta_wayland_session_manager_free (MetaWaylandXdgSessionManager *session_manager
{
g_clear_pointer (&session_manager->sessions, g_hash_table_unref);
g_clear_pointer (&session_manager->session_states, g_hash_table_unref);
g_clear_handle_id (&session_manager->save_timeout_id, g_source_remove);
g_free (session_manager);
}