static void
cached_dir_unref (CachedDir *dir)
{
if (--dir->references == 0)
{
CachedDir *parent;
parent = dir->parent;
if (parent != NULL)
cached_dir_remove_subdir (parent, dir->name);
if (dir->notify)
dir->notify (dir, dir->notify_data);
cached_dir_free (dir);
}
}
static void
cached_dir_unref (CachedDir *dir)
{
gboolean is_zero;
is_zero = g_atomic_int_dec_and_test (&dir->references);
if (is_zero)
{
CachedDir *parent;
parent = dir->parent;
if (parent != NULL)
cached_dir_remove_subdir (parent, dir->name);
if (dir->notify)
dir->notify (dir, dir->notify_data);
cached_dir_free (dir);
}
}
static void
handle_cached_dir_changed (MenuMonitor *monitor,
MenuMonitorEvent event,
const char *path,
CachedDir *dir)
{
gboolean handled = FALSE;
char *basename;
char *dirname;
menu_verbose ("'%s' notified of '%s' %s - invalidating cache\n",
dir->name,
path,
event == MENU_MONITOR_EVENT_CREATED ? ("created") :
event == MENU_MONITOR_EVENT_DELETED ? ("deleted") : ("changed"));
dirname = g_path_get_dirname (path);
basename = g_path_get_basename (path);
dir = cached_dir_lookup (dirname);
if (g_str_has_suffix (basename, ".desktop") ||
g_str_has_suffix (basename, ".directory"))
{
switch (event)
{
case MENU_MONITOR_EVENT_CREATED:
case MENU_MONITOR_EVENT_CHANGED:
handled = cached_dir_update_entry (dir, basename, path);
break;
case MENU_MONITOR_EVENT_DELETED:
handled = cached_dir_remove_entry (dir, basename);
break;
default:
g_assert_not_reached ();
break;
}
}
else /* Try recursing */
{
switch (event)
{
case MENU_MONITOR_EVENT_CREATED:
handled = cached_dir_add_subdir (dir, basename, path) != NULL;
break;
case MENU_MONITOR_EVENT_CHANGED:
break;
case MENU_MONITOR_EVENT_DELETED:
handled = cached_dir_remove_subdir (dir, basename);
break;
default:
g_assert_not_reached ();
break;
}
}
g_free (basename);
g_free (dirname);
if (handled)
{
/* CHANGED events don't change the set of desktop entries */
if (event == MENU_MONITOR_EVENT_CREATED || event == MENU_MONITOR_EVENT_DELETED)
{
_entry_directory_list_empty_desktop_cache ();
}
cached_dir_queue_monitor_event (dir);
}
}
static void
handle_cached_dir_changed (MenuMonitor *monitor,
MenuMonitorEvent event,
const char *path,
CachedDir *dir)
{
gboolean handled = FALSE;
gboolean retry_changes = FALSE;
char *basename;
char *dirname;
dirname = g_path_get_dirname (path);
basename = g_path_get_basename (path);
dir = cached_dir_lookup (dirname);
cached_dir_add_reference (dir);
if (g_str_has_suffix (basename, ".desktop") ||
g_str_has_suffix (basename, ".directory"))
{
switch (event)
{
case MENU_MONITOR_EVENT_CREATED:
case MENU_MONITOR_EVENT_CHANGED:
handled = cached_dir_update_entry (dir, basename, path);
break;
case MENU_MONITOR_EVENT_DELETED:
handled = cached_dir_remove_entry (dir, basename);
break;
default:
g_assert_not_reached ();
break;
}
}
else if (g_strcmp0 (basename, "mimeinfo.cache") == 0)
{
/* The observed file notifies when a new desktop file is added
* (but fails to load) go something like:
*
* NOTIFY: foo.desktop
* NOTIFY: mimeinfo.cache.tempfile
* NOTIFY: mimeinfo.cache.tempfile
* NOTIFY: mimeinfo.cache
*
* Additionally, the failure is not upon trying to read the file,
* but attempting to get its GAppInfo (g_desktop_app_info_new_from_filename()
* in desktop-entries.c ln 277). If you jigger desktop_entry_load() around
* and read the file as a keyfile *first*, it succeeds. If you then try
* to run g_desktop_app_info_new_from_keyfile(), *then* it fails.
*
* The theory here is there is a race condition where app info (which includes
* mimetype stuff) is unavailable because mimeinfo.cache is updated immediately
* after the app is installed.
*
* What we do here is, when a desktop fails to load, we add it to a temporary
* list. We wait until mimeinfo.cache changes, then retry that desktop file,
* which succeeds this second time.
*
* Note: An alternative fix (presented more as a proof than a suggestion) is to
* change line 151 in menu-monitor.c to use g_timeout_add_seconds, and delay
* for one second. This also avoids the issue (but it remains a race condition).
*/
GSList *iter;
menu_verbose ("mimeinfo changed, checking for failed entries\n");
for (iter = dir->retry_later_desktop_entries; iter != NULL; iter = iter->next)
{
const gchar *retry_path = iter->data;
menu_verbose ("retrying %s\n", retry_path);
char *retry_basename = g_path_get_basename (retry_path);
if (cached_dir_update_entry (dir, retry_basename, retry_path))
retry_changes = TRUE;
g_free (retry_basename);
}
g_slist_free_full (dir->retry_later_desktop_entries, g_free);
dir->retry_later_desktop_entries = NULL;
handled = retry_changes;
}
else /* Try recursing */
{
switch (event)
{
case MENU_MONITOR_EVENT_CREATED:
handled = cached_dir_add_subdir (dir, basename, path) != NULL;
break;
case MENU_MONITOR_EVENT_CHANGED:
break;
case MENU_MONITOR_EVENT_DELETED:
handled = cached_dir_remove_subdir (dir, basename);
break;
default:
g_assert_not_reached ();
break;
}
}
g_free (basename);
g_free (dirname);
if (handled)
{
menu_verbose ("'%s' notified of '%s' %s - invalidating cache\n",
dir->name,
path,
event == MENU_MONITOR_EVENT_CREATED ? ("created") :
event == MENU_MONITOR_EVENT_DELETED ? ("deleted") : ("changed"));
/* CHANGED events don't change the set of desktop entries, unless it's the mimeinfo.cache file changing */
if (retry_changes || (event == MENU_MONITOR_EVENT_CREATED || event == MENU_MONITOR_EVENT_DELETED))
{
_entry_directory_list_empty_desktop_cache ();
}
cached_dir_queue_monitor_event (dir);
}
cached_dir_remove_reference (dir);
}