(transform_heads): replace

[lilypond.git] / lily / recording-group-engraver.cc

diff --git a/lily/recording-group-engraver.cc b/lily/recording-group-engraver.cc
index 1852b26372bb8c600c696701af52379b7b5de896..4f3afcf6c14e640af3095d3d8ae841142bf4887f 100644 (file)
--- a/lily/recording-group-engraver.cc
+++ b/lily/recording-group-engraver.cc
@@ -13,15 +13,15 @@
 
 class Recording_group_engraver : public Engraver_group_engraver
 {
-  void start ();
 public:
   TRANSLATOR_DECLARATIONS (Recording_group_engraver);
   virtual bool try_music (Music *m);
-  virtual void start_translation_timestep ();
+  void add_music (SCM, SCM);
   virtual void stop_translation_timestep ();
   virtual void finalize ();
   virtual void initialize ();
   virtual void derived_mark () const;
+  SCM now_events_;
   SCM accumulator_;
 };
 
@@ -29,6 +29,7 @@ void
 Recording_group_engraver::derived_mark () const
 {
   Engraver_group_engraver::derived_mark();
+  scm_gc_mark (now_events_);
   scm_gc_mark (accumulator_);
 }
 
@@ -36,51 +37,31 @@ void
 Recording_group_engraver::initialize ()
 {
   Engraver_group_engraver::initialize ();
-  start ();
 }
 
 Recording_group_engraver::Recording_group_engraver ()
 {
   accumulator_ = SCM_EOL;
+  now_events_ = SCM_EOL;
 }
 
 void
-Recording_group_engraver::start_translation_timestep ()
+Recording_group_engraver::add_music (SCM music, SCM success)
 {
-  Engraver_group_engraver::start_translation_timestep ();
-
-
-  /*
-    We have to do this both in initialize () and
-    start_translation_timestep (), since start_translation_timestep ()
-    isn't called on the first time-step.
-   */
-  start () ;
+  now_events_ = scm_cons (scm_cons (music, success), now_events_);
 }
 
-void
-Recording_group_engraver::start ()
-{
-  if (!ly_c_pair_p (accumulator_))
-    accumulator_ = scm_cons (SCM_EOL, SCM_EOL);
-  if (!ly_c_pair_p (ly_car (accumulator_)))
-    {
-      /*
-       Need to store transposition for every moment; transposition changes during pieces.
-       */
-      scm_set_car_x (accumulator_, scm_cons (scm_cons (now_mom ().smobbed_copy (),
-                                                    get_property ("instrumentTransposition")),
-                                                    SCM_EOL));
-    }
-}
 
 void
 Recording_group_engraver::stop_translation_timestep ()
 {
   Engraver_group_engraver::stop_translation_timestep ();
-  scm_set_cdr_x (accumulator_, scm_cons (ly_car (accumulator_), ly_cdr (accumulator_)));
 
-  scm_set_car_x (accumulator_, SCM_EOL);
+  accumulator_ = scm_acons (scm_cons (now_mom ().smobbed_copy (),
+                                    get_property ("instrumentTransposition")),
+                           now_events_,
+                           accumulator_);
+  now_events_ = SCM_EOL;
 }
 
 void
@@ -90,9 +71,7 @@ Recording_group_engraver::finalize ()
   SCM proc = get_property ("recordEventSequence");
 
   if (ly_c_procedure_p (proc))
-    scm_call_2  (proc, context ()->self_scm (), ly_cdr (accumulator_));
-
-  accumulator_ = SCM_EOL;
+    scm_call_2  (proc, context ()->self_scm (), scm_cdr (accumulator_));
 }
 
 bool
@@ -100,17 +79,12 @@ Recording_group_engraver::try_music (Music  *m)
 {
   bool retval = Translator_group::try_music (m);
 
-  SCM seq = ly_cdar (accumulator_);
-  seq = scm_cons (scm_cons  (m->self_scm (), ly_bool2scm (retval)),
-                seq);
-  
-  scm_set_cdr_x  (ly_car (accumulator_), seq);
-
+  add_music (m->self_scm (), ly_bool2scm (retval));
   return retval;
 }
 
 
-ENTER_DESCRIPTION (Recording_group_engraver,
+ADD_TRANSLATOR (Recording_group_engraver,
                  "Engraver_group_engraver that records all music events "
                  "for this context. Calls the procedure "
                  "in @code{recordEventSequence} when finished.",