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_;
40 Chord_name_engraver::Chord_name_engraver ()
43 last_chord_ = SCM_EOL;
47 Chord_name_engraver::add_note (Music * n)
53 Chord_name_engraver::process_music ()
59 SCM inversion = SCM_EOL;
60 SCM pitches = SCM_EOL;
62 Music* inversion_event = 0;
63 for (int i =0 ; i < notes_.size (); i++)
66 SCM p = n->get_mus_property ("pitch");
67 if (!unsmob_pitch (p))
70 if (n->get_mus_property ("inversion") == SCM_BOOL_T)
75 else if (n->get_mus_property ("bass") == SCM_BOOL_T)
78 pitches = gh_cons (p, pitches);
83 SCM oct = inversion_event->get_mus_property ("octavation");
84 if (gh_number_p (oct))
86 Pitch *p = unsmob_pitch (inversion_event->get_mus_property ("pitch"));
87 int octavation = gh_scm2int (oct);
88 Pitch orig = p->transposed (Pitch (-octavation, 0,0));
90 pitches= gh_cons (orig.smobbed_copy (), pitches);
93 programming_error ("Inversion does not have original pitch.");
96 pitches = scm_sort_list (pitches, Pitch::less_p_proc);
98 SCM name_proc = get_property ("chordNameFunction");
99 SCM markup = scm_call_4 (name_proc, pitches, bass, inversion,
100 daddy_trans_->self_scm());
105 SCM chord_as_scm = gh_cons (pitches, gh_cons (bass, inversion));
107 chord_name_ = new Item (get_property ("ChordName"));
108 chord_name_->set_grob_property("text", markup);
109 announce_grob(chord_name_, notes_[0]->self_scm ());
110 SCM s = get_property ("chordChanges");
111 if (to_boolean (s) && gh_pair_p (last_chord_)
112 && gh_equal_p (chord_as_scm, last_chord_))
113 chord_name_->set_grob_property ("begin-of-line-visible", SCM_BOOL_T);
115 last_chord_ = chord_as_scm;
119 Chord_name_engraver::try_music (Music* m)
124 if (m->is_mus_type ("note-event"))
133 Chord_name_engraver::stop_translation_timestep ()
137 typeset_grob (chord_name_);
144 The READs description is not strictly accurate:
145 which properties are read depend on the chord naming function active.
147 ENTER_DESCRIPTION(Chord_name_engraver,
148 /* descr */ "Catch note-events "
149 "and generate the appropriate chordname.",
150 /* creats*/ "ChordName",
151 /* accepts */ "note-event",
153 /* reads */ "chordChanges chordNameExceptions chordNameFunction "
154 "chordNoteNamer chordRootNamer chordNameExceptions majorSevenSymbol",