feedback-manager: Handle important hint

This allows blessed apps to override the per-app as well as the global
feedback level. This can e.g. be useful for alarm clocks.

src/fbd-feedback-manager.c

@@ -26,6 +26,7 @@
 #define FEEDBACKD_SCHEMA_ID "org.sigxcpu.feedbackd"
 #define FEEDBACKD_KEY_PROFILE "profile"
 #define FEEDBACKD_KEY_THEME "theme"
+#define FEEDBACKD_KEY_ALLOW_IMPORTANT "allow-important"
 
 #define APP_SCHEMA FEEDBACKD_SCHEMA_ID ".application"
 #define APP_PREFIX "/org/sigxcpu/feedbackd/application/"
@@ -48,6 +49,7 @@ typedef struct _FbdFeedbackManager {
   FbdFeedbackProfileLevel  level;
   FbdFeedbackTheme        *theme;
   guint                    next_id;
+  GStrv                    allow_important;
 
   /* Key: event id, value: event */
   GHashTable              *events;
@@ -225,6 +227,33 @@ on_feedbackd_setting_changed (FbdFeedbackManager *self,
   }
 }
 
+
+static gboolean
+app_is_important (FbdFeedbackManager *self, const char *app_id)
+{
+  if (!self->allow_important)
+    return FALSE;
+
+  if (g_strv_contains ((const char *const *)self->allow_important, app_id))
+    return TRUE;
+
+  return FALSE;
+}
+
+
+static void
+on_feedbackd_allow_important_changed (FbdFeedbackManager *self,
+                                      const gchar        *key,
+                                      GSettings          *settings)
+{
+  g_return_if_fail (FBD_IS_FEEDBACK_MANAGER (self));
+  g_return_if_fail (G_IS_SETTINGS (settings));
+
+  g_strfreev (self->allow_important);
+  self->allow_important = g_settings_get_strv(self->settings, FEEDBACKD_KEY_ALLOW_IMPORTANT);
+}
+
+
 static void
 on_client_vanished (GDBusConnection *connection,
 		    const gchar     *name,
@@ -341,7 +370,7 @@ fbd_feedback_manager_handle_trigger_feedback (LfbGdbusFeedback      *object,
   const gchar *sender;
   FbdFeedbackProfileLevel app_level, level, hint_level = FBD_FEEDBACK_PROFILE_LEVEL_FULL;
   gboolean found_fb = FALSE;
-  gboolean hint_important = FALSE;
+  gboolean hint_important = FALSE, can_important;
 
   sender = g_dbus_method_invocation_get_sender (invocation);
   g_debug ("Event '%s' for '%s' from %s", arg_event, arg_app_id, sender);
@@ -381,7 +410,12 @@ fbd_feedback_manager_handle_trigger_feedback (LfbGdbusFeedback      *object,
   g_hash_table_insert (self->events, GUINT_TO_POINTER (event_id), event);
 
   app_level = app_get_feedback_level (arg_app_id);
-  level = get_max_level (self->level, app_level, hint_level);
+  can_important = app_is_important (self, arg_app_id);
+
+  if (hint_important && can_important)
+    level = hint_level;
+  else
+    level = get_max_level (self->level, app_level, hint_level);
 
   feedbacks = fbd_feedback_theme_lookup_feedback (self->theme, level, event);
   if (feedbacks) {
@@ -461,8 +495,13 @@ fbd_feedback_manager_constructed (GObject *object)
   g_signal_connect_swapped (self->settings, "changed::" FEEDBACKD_KEY_PROFILE,
                             G_CALLBACK (on_feedbackd_setting_changed), self);
   on_feedbackd_setting_changed (self, FEEDBACKD_KEY_PROFILE, self->settings);
+
+  g_signal_connect_swapped (self->settings, "changed::" FEEDBACKD_KEY_ALLOW_IMPORTANT,
+                            G_CALLBACK (on_feedbackd_allow_important_changed), self);
+  on_feedbackd_allow_important_changed (self, FEEDBACKD_KEY_ALLOW_IMPORTANT, self->settings);
 }
 
+
 static void
 fbd_feedback_manager_dispose (GObject *object)
 {
@@ -474,6 +513,8 @@ fbd_feedback_manager_dispose (GObject *object)
   g_clear_object (&self->vibra);
   g_clear_object (&self->leds);
   g_clear_object (&self->client);
+
+  g_clear_pointer (&self->allow_important, g_strfreev);
   g_clear_pointer (&self->events, g_hash_table_destroy);
   g_clear_pointer (&self->clients, g_hash_table_destroy);