2 recording-group-engraver.cc -- implement Recording_group_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2003--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "engraver-group-engraver.hh"
11 #include "protected-scm.hh"
13 class Recording_group_engraver : public Engraver_group_engraver
16 TRANSLATOR_DECLARATIONS (Recording_group_engraver);
17 virtual bool try_music (Music *m);
18 void add_music (SCM, SCM);
19 virtual void stop_translation_timestep ();
20 virtual void finalize ();
21 virtual void initialize ();
22 virtual void derived_mark () const;
28 Recording_group_engraver::derived_mark () const
30 Engraver_group_engraver::derived_mark ();
31 scm_gc_mark (now_events_);
32 scm_gc_mark (accumulator_);
36 Recording_group_engraver::initialize ()
38 Engraver_group_engraver::initialize ();
41 Recording_group_engraver::Recording_group_engraver ()
43 accumulator_ = SCM_EOL;
44 now_events_ = SCM_EOL;
48 Recording_group_engraver::add_music (SCM music, SCM success)
50 now_events_ = scm_cons (scm_cons (music, success), now_events_);
54 Recording_group_engraver::stop_translation_timestep ()
56 Engraver_group_engraver::stop_translation_timestep ();
58 accumulator_ = scm_acons (scm_cons (now_mom ().smobbed_copy (),
59 get_property ("instrumentTransposition")),
62 now_events_ = SCM_EOL;
66 Recording_group_engraver::finalize ()
68 Engraver_group_engraver::finalize ();
69 SCM proc = get_property ("recordEventSequence");
71 if (ly_is_procedure (proc))
72 scm_call_2 (proc, context ()->self_scm (), scm_cdr (accumulator_));
76 Recording_group_engraver::try_music (Music *m)
78 bool retval = Translator_group::try_music (m);
80 add_music (m->self_scm (), ly_bool2scm (retval));
84 ADD_TRANSLATOR (Recording_group_engraver,
85 "Engraver_group_engraver that records all music events "
86 "for this context. Calls the procedure "
87 "in @code{recordEventSequence} when finished.",
91 "recordEventSequence",