X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstaff-symbol-engraver.cc;h=fad9f0437900d5765301d6eb82376b9ce714d38e;hb=5d84bfad4626892bcffd05adcced53c8a2329047;hp=509f86184a280b53bd2e6ab96bf7e5571bc00942;hpb=d61cf3bbdb1c6670a127ba3baddf2f04d3e34fd3;p=lilypond.git

diff --git a/lily/staff-symbol-engraver.cc b/lily/staff-symbol-engraver.cc
index 509f86184a..fad9f04379 100644
--- a/lily/staff-symbol-engraver.cc
+++ b/lily/staff-symbol-engraver.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1997--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -42,12 +42,23 @@ protected:
 
   void stop_translation_timestep ();
   virtual ~Staff_symbol_engraver ();
-  DECLARE_ACKNOWLEDGER (grob);
-  DECLARE_TRANSLATOR_LISTENER (staff_span);
+  void acknowledge_grob (Grob_info);
+  void listen_staff_span (Stream_event *);
   virtual void finalize ();
   void process_music ();
+  virtual void derived_mark () const;
 };
 
+void
+Staff_symbol_engraver::derived_mark () const
+{
+  for (LEFT_and_RIGHT (d))
+    {
+      if (span_events_[d])
+        scm_gc_mark (span_events_[d]->self_scm ());
+    }
+}
+
 Staff_symbol_engraver::~Staff_symbol_engraver ()
 {
   if (span_)
@@ -57,7 +68,8 @@ Staff_symbol_engraver::~Staff_symbol_engraver ()
     }
 }
 
-Staff_symbol_engraver::Staff_symbol_engraver ()
+Staff_symbol_engraver::Staff_symbol_engraver (Context *c)
+  : Engraver (c)
 {
   finished_span_ = 0;
   first_start_ = true;
@@ -65,7 +77,6 @@ Staff_symbol_engraver::Staff_symbol_engraver ()
   span_events_.set (0, 0);
 }
 
-IMPLEMENT_TRANSLATOR_LISTENER (Staff_symbol_engraver, staff_span);
 void
 Staff_symbol_engraver::listen_staff_span (Stream_event *ev)
 {
@@ -99,7 +110,7 @@ Staff_symbol_engraver::start_spanner ()
     {
       span_ = make_spanner ("StaffSymbol", SCM_EOL);
       span_->set_bound (LEFT,
-                        unsmob_grob (get_property ("currentCommandColumn")));
+                        unsmob<Grob> (get_property ("currentCommandColumn")));
     }
 }
 
@@ -110,7 +121,7 @@ Staff_symbol_engraver::stop_spanner ()
     return;
 
   if (!finished_span_->get_bound (RIGHT))
-    finished_span_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+    finished_span_->set_bound (RIGHT, unsmob<Grob> (get_property ("currentCommandColumn")));
 
   announce_end_grob (finished_span_,
                      span_events_[STOP]
@@ -152,7 +163,13 @@ Staff_symbol_engraver::acknowledge_grob (Grob_info s)
     }
 }
 
-ADD_ACKNOWLEDGER (Staff_symbol_engraver, grob);
+
+void
+Staff_symbol_engraver::boot ()
+{
+  ADD_LISTENER (Staff_symbol_engraver, staff_span);
+  ADD_ACKNOWLEDGER (Staff_symbol_engraver, grob);
+}
 
 ADD_TRANSLATOR (Staff_symbol_engraver,
                 /* doc */