2 chord-name-engraver.cc -- implement Chord_name_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2002 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "chord-name.hh"
12 #include "musical-request.hh"
13 #include "paper-def.hh"
14 #include "font-interface.hh"
15 #include "paper-def.hh"
17 #include "dimensions.hh"
20 #include "protected-scm.hh"
22 class Chord_name_engraver : public Engraver
25 TRANSLATOR_DECLARATIONS( Chord_name_engraver);
28 virtual void stop_translation_timestep ();
29 virtual void acknowledge_grob (Grob_info i);
30 virtual void create_grobs ();
31 virtual bool try_music (Music *);
34 void add_note (Note_req *);
39 Protected_scm last_chord_;
44 Chord_name_engraver::Chord_name_engraver ()
47 chord_ = gh_cons (SCM_EOL, gh_cons (SCM_EOL, SCM_EOL));
52 Chord_name_engraver::add_note (Note_req* n)
54 SCM pitches = ly_car (chord_);
55 SCM modifiers = ly_cdr (chord_);
56 SCM inversion = modifiers == SCM_EOL ? SCM_EOL : ly_car (modifiers);
57 SCM bass = modifiers == SCM_EOL ? SCM_EOL : ly_cdr (modifiers);
59 if (n->get_mus_property ("inversion") == SCM_BOOL_T)
60 inversion = n->get_mus_property ("pitch");
61 else if (n->get_mus_property ("bass") == SCM_BOOL_T)
62 bass = n->get_mus_property ("pitch");
64 pitches = scm_sort_list (gh_cons (n->get_mus_property ("pitch"), pitches),
66 chord_ = gh_cons (pitches, gh_cons (inversion, bass));
70 Chord_name_engraver::try_music (Music* m)
72 if (Note_req* n = dynamic_cast<Note_req*> (m))
81 Chord_name_engraver::acknowledge_grob (Grob_info i)
83 if (Note_req* n = dynamic_cast<Note_req*> (i.music_cause ()))
88 Chord_name_engraver::create_grobs ()
90 if (!chord_name_p_ && ly_car (chord_) != SCM_EOL)
92 chord_name_p_ = new Item (get_property ("ChordName"));
93 chord_name_p_->set_grob_property ("chord", chord_);
94 announce_grob(chord_name_p_, SCM_EOL);
95 SCM s = get_property ("chordChanges");
96 if (to_boolean (s) && ly_car (last_chord_) != SCM_EOL
97 && gh_equal_p (chord_, last_chord_))
98 chord_name_p_->set_grob_property ("begin-of-line-visible", SCM_BOOL_T);
103 Chord_name_engraver::stop_translation_timestep ()
107 typeset_grob (chord_name_p_);
111 if (ly_car (chord_) != SCM_EOL)
112 last_chord_ = chord_;
113 chord_ = gh_cons (SCM_EOL, gh_cons (SCM_EOL, SCM_EOL));
116 ENTER_DESCRIPTION(Chord_name_engraver,
117 /* descr */ "Catch Note_req's, Tonic_reqs, Inversion_reqs, Bass_req
118 and generate the appropriate chordname.",
119 /* creats*/ "ChordName",
120 /* acks */ "grob-interface",
121 /* reads */ "chordChanges",