2 chord-name-engraver.cc -- implement New_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"
13 #include "paper-def.hh"
14 #include "font-interface.hh"
15 #include "paper-def.hh"
17 #include "dimensions.hh"
20 #include "protected-scm.hh"
21 #include "translator-group.hh"
23 class New_chord_name_engraver : public Engraver
25 TRANSLATOR_DECLARATIONS( New_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 New_chord_name_engraver::New_chord_name_engraver ()
45 last_chord_ = SCM_EOL;
49 New_chord_name_engraver::add_note (Music * n)
55 New_chord_name_engraver::process_music ()
61 SCM inversion = SCM_EOL;
62 SCM pitches = SCM_EOL;
64 for (int i =0 ; i < notes_.size (); i++)
67 SCM p = n->get_mus_property ("pitch");;
68 if (n->get_mus_property ("inversion") == SCM_BOOL_T)
70 else if (n->get_mus_property ("bass") == SCM_BOOL_T)
73 pitches = gh_cons (p, pitches);
76 pitches = scm_sort_list (pitches, Pitch::less_p_proc);
78 SCM name_proc = get_property ("chordNameFunction");
79 SCM markup = scm_call_4 (name_proc, pitches, bass, inversion,
80 daddy_trans_->self_scm());
85 SCM chord_as_scm = gh_cons (pitches, gh_cons (bass, inversion));
87 chord_name_ = new Item (get_property ("ChordName"));
88 chord_name_->set_grob_property("text", markup);
89 announce_grob(chord_name_, SCM_EOL);
90 SCM s = get_property ("chordChanges");
91 if (to_boolean (s) && gh_pair_p (last_chord_)
92 && gh_equal_p (chord_as_scm, last_chord_))
93 chord_name_->set_grob_property ("begin-of-line-visible", SCM_BOOL_T);
95 last_chord_ = chord_as_scm;
99 New_chord_name_engraver::try_music (Music* m)
104 if (m->is_mus_type ("note-event"))
113 New_chord_name_engraver::stop_translation_timestep ()
117 typeset_grob (chord_name_);
123 ENTER_DESCRIPTION(New_chord_name_engraver,
124 /* descr */ "Catch note-events "
125 "and generate the appropriate chordname.",
126 /* creats*/ "ChordName",
127 /* accepts */ "note-event",
129 /* reads */ "chordChanges chordNameExceptions chordNameFunction",