[timeline] Expose the msec advancement

The method of ClutterTimeline that advances the timeline by a
delta (in millisecond) is going to be useful for testing the
timeline's behaviour -- and unbreak the timeline test suite that
was broken by the MasterClock merge.

clutter/clutter-master-clock.c

@@ -356,7 +356,7 @@ _clutter_master_clock_advance (ClutterMasterClock *master_clock)
       ClutterTimeline *timeline = l->data;
 
       if (clutter_timeline_is_playing (timeline))
-        _clutter_timeline_set_delta (timeline, msecs);
+        clutter_timeline_advance_delta (timeline, msecs);
     }
 
   master_clock->msecs_delta = msecs;

clutter/clutter-private.h

@@ -207,9 +207,6 @@ guint         _clutter_pixel_to_id (guchar pixel[4]);
 
 void          _clutter_id_to_color (guint id, ClutterColor *col);
 
-void          _clutter_timeline_set_delta (ClutterTimeline *timeline,
-                                           guint            msecs);
-
 /* use this function as the accumulator if you have a signal with
  * a G_TYPE_BOOLEAN return value; this will stop the emission as
  * soon as one handler returns TRUE

clutter/clutter-timeline.c

@@ -1022,21 +1022,19 @@ clutter_timeline_set_speed (ClutterTimeline *timeline,
 
   if (priv->fps != fps)
     {
-      g_object_ref (timeline);
+      g_object_freeze_notify (G_OBJECT (timeline));
 
       priv->fps = fps;
       priv->frame_interval = 1000 / priv->fps;
 
-      /* FIXME if the timeline is playing restart */
-
-      g_object_freeze_notify (G_OBJECT (timeline));
+      /* if the timeline is playing restart */
+      if (priv->is_playing)
+        clutter_timeline_rewind (timeline);
 
       g_object_notify (G_OBJECT (timeline), "duration");
       g_object_notify (G_OBJECT (timeline), "fps");
 
       g_object_thaw_notify (G_OBJECT (timeline));
-
-      g_object_unref (timeline);
     }
 }
 
@@ -1372,7 +1370,7 @@ clutter_timeline_get_delta (ClutterTimeline *timeline,
 }
 
 /*
- * clutter_timeline_set_delta:
+ * clutter_timeline_advance_delta:
  * @timeline: a #ClutterTimeline
  * @msecs: advance in milliseconds
  *
@@ -1383,8 +1381,8 @@ clutter_timeline_get_delta (ClutterTimeline *timeline,
  * skip frames.
  */
 void
-_clutter_timeline_set_delta (ClutterTimeline *timeline,
-                             guint            msecs)
+clutter_timeline_advance_delta (ClutterTimeline *timeline,
+                                guint            msecs)
 {
   ClutterTimelinePrivate *priv;
 

clutter/clutter-timeline.h

@@ -166,6 +166,10 @@ gboolean         clutter_timeline_has_marker            (ClutterTimeline *timeli
 void             clutter_timeline_advance_to_marker     (ClutterTimeline *timeline,
                                                          const gchar     *marker_name);
 
+/*< private >*/
+void             clutter_timeline_advance_delta         (ClutterTimeline *timeline,
+                                                         guint            msecs);
+
 G_END_DECLS
 
 #endif /* _CLUTTER_TIMELINE_H__ */