2 chord-name-engraver.cc -- implement Chord_name_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2007 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "chord-name.hh"
11 #include "dimensions.hh"
12 #include "engraver.hh"
13 #include "font-interface.hh"
15 #include "output-def.hh"
17 #include "protected-scm.hh"
18 #include "stream-event.hh"
21 #include "translator.icc"
23 class Chord_name_engraver : public Engraver
25 TRANSLATOR_DECLARATIONS (Chord_name_engraver);
27 void stop_translation_timestep ();
28 void process_music ();
29 virtual void finalize ();
30 virtual void derived_mark () const;
31 DECLARE_TRANSLATOR_LISTENER (note);
34 vector<Stream_event*> notes_;
40 Chord_name_engraver::finalize ()
45 Chord_name_engraver::derived_mark () const
47 scm_gc_mark (last_chord_);
50 Chord_name_engraver::Chord_name_engraver ()
53 last_chord_ = SCM_EOL;
57 Chord_name_engraver::process_music ()
63 SCM inversion = SCM_EOL;
64 SCM pitches = SCM_EOL;
66 Stream_event *inversion_event = 0;
67 for (vsize i = 0; i < notes_.size (); i++)
69 Stream_event *n = notes_[i];
70 SCM p = n->get_property ("pitch");
71 if (!unsmob_pitch (p))
74 if (n->get_property ("inversion") == SCM_BOOL_T)
79 else if (n->get_property ("bass") == SCM_BOOL_T)
82 pitches = scm_cons (p, pitches);
87 SCM oct = inversion_event->get_property ("octavation");
88 if (scm_is_number (oct))
90 Pitch *p = unsmob_pitch (inversion_event->get_property ("pitch"));
91 int octavation = scm_to_int (oct);
92 Pitch orig = p->transposed (Pitch (-octavation, 0, 0));
94 pitches = scm_cons (orig.smobbed_copy (), pitches);
97 programming_error ("inversion does not have original pitch");
100 pitches = scm_sort_list (pitches, Pitch::less_p_proc);
102 SCM name_proc = get_property ("chordNameFunction");
103 SCM markup = scm_call_4 (name_proc, pitches, bass, inversion,
104 context ()->self_scm ());
109 SCM chord_as_scm = scm_cons (pitches, scm_cons (bass, inversion));
111 chord_name_ = make_item ("ChordName", notes_[0]->self_scm ());
112 chord_name_->set_property ("text", markup);
114 SCM s = get_property ("chordChanges");
115 if (to_boolean (s) && scm_is_pair (last_chord_)
116 && ly_is_equal (chord_as_scm, last_chord_))
117 chord_name_->set_property ("begin-of-line-visible", SCM_BOOL_T);
119 last_chord_ = chord_as_scm;
122 IMPLEMENT_TRANSLATOR_LISTENER (Chord_name_engraver, note);
124 Chord_name_engraver::listen_note (Stream_event *ev)
126 notes_.push_back (ev);
130 Chord_name_engraver::stop_translation_timestep ()
137 The READs description is not strictly accurate:
138 which properties are read depend on the chord naming function active.
140 ADD_TRANSLATOR (Chord_name_engraver,
141 /* doc */ "Catch note-events "
142 "and generate the appropriate chordname.",
144 /* create */ "ChordName",
145 /* read */ "chordChanges "
146 "chordNameExceptions "
150 "chordNameExceptions "