2 chord-name-engraver.cc -- implement Chord_name_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2003 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "chord-name.hh"
12 #include "paper-def.hh"
13 #include "font-interface.hh"
14 #include "paper-def.hh"
16 #include "dimensions.hh"
19 #include "protected-scm.hh"
20 #include "translator-group.hh"
23 class Chord_name_engraver : public Engraver
25 TRANSLATOR_DECLARATIONS( Chord_name_engraver);
27 virtual void stop_translation_timestep ();
28 virtual void process_music ();
29 virtual bool try_music (Music *);
32 void add_note (Music *);
35 Link_array<Music> notes_;
37 Protected_scm last_chord_;
42 Chord_name_engraver::Chord_name_engraver ()
45 last_chord_ = SCM_EOL;
49 Chord_name_engraver::add_note (Music * n)
55 Chord_name_engraver::process_music ()
61 SCM inversion = SCM_EOL;
62 SCM pitches = SCM_EOL;
64 Music* inversion_event = 0;
65 for (int i =0 ; i < notes_.size (); i++)
68 SCM p = n->get_mus_property ("pitch");
69 if (!unsmob_pitch (p))
72 if (n->get_mus_property ("inversion") == SCM_BOOL_T)
77 else if (n->get_mus_property ("bass") == SCM_BOOL_T)
80 pitches = gh_cons (p, pitches);
85 SCM oct = inversion_event->get_mus_property ("octavation");
86 if (gh_number_p (oct))
88 Pitch *p = unsmob_pitch (inversion_event->get_mus_property ("pitch"));
89 int octavation = gh_scm2int (oct);
90 Pitch orig = p->transposed (Pitch (-octavation, 0,0));
92 pitches= gh_cons (orig.smobbed_copy (), pitches);
95 programming_error ("Inversion does not have original pitch.");
98 pitches = scm_sort_list (pitches, Pitch::less_p_proc);
100 SCM name_proc = get_property ("chordNameFunction");
101 SCM markup = scm_call_4 (name_proc, pitches, bass, inversion,
102 daddy_trans_->self_scm());
107 SCM chord_as_scm = gh_cons (pitches, gh_cons (bass, inversion));
109 chord_name_ = new Item (get_property ("ChordName"));
110 chord_name_->set_grob_property("text", markup);
111 announce_grob(chord_name_, SCM_EOL);
112 SCM s = get_property ("chordChanges");
113 if (to_boolean (s) && gh_pair_p (last_chord_)
114 && gh_equal_p (chord_as_scm, last_chord_))
115 chord_name_->set_grob_property ("begin-of-line-visible", SCM_BOOL_T);
117 last_chord_ = chord_as_scm;
121 Chord_name_engraver::try_music (Music* m)
126 if (m->is_mus_type ("note-event"))
135 Chord_name_engraver::stop_translation_timestep ()
139 typeset_grob (chord_name_);
146 The READs description is not strictly accurate:
147 which properties are read depend on the chord naming function active.
149 ENTER_DESCRIPTION(Chord_name_engraver,
150 /* descr */ "Catch note-events "
151 "and generate the appropriate chordname.",
152 /* creats*/ "ChordName",
153 /* accepts */ "note-event",
155 /* reads */ "chordChanges chordNameExceptions chordNameFunction "
156 "chordNoteNamer chordRootNamer chordNameExceptions majorSevenSymbol",