2 custos-engraver.cc -- implement Custos_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2005 Juergen Reuter <reuter@ipd.uka.de>,
7 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "engraver.hh"
11 #include "bar-line.hh"
13 #include "note-head.hh"
14 #include "staff-symbol-referencer.hh"
20 * This class implements an engraver for custos symbols.
22 * FIXME: note heads inside of ligatures (i.e. ligature heads) are
23 * sometimes not recognized by this engraver. --jr
25 class Custos_engraver : public Engraver
28 TRANSLATOR_DECLARATIONS (Custos_engraver);
29 virtual void start_translation_timestep ();
30 virtual void acknowledge_grob (Grob_info);
31 virtual void process_acknowledged_grobs ();
32 virtual void stop_translation_timestep ();
33 virtual void finalize ();
36 Item *create_custos ();
37 bool custos_permitted;
38 Link_array<Grob> custodes_;
39 Array<Pitch> pitches_;
42 Custos_engraver::Custos_engraver ()
44 custos_permitted = false;
48 Custos_engraver::stop_translation_timestep ()
51 delay typeset until we're at the next moment, so we can silence custodes at the end of the piece.
55 custos_permitted = false;
59 Custos_engraver::start_translation_timestep ()
65 Custos_engraver::acknowledge_grob (Grob_info info)
67 Item *item = dynamic_cast<Item *> (info.grob ());
70 Music *m = info.music_cause ();
71 if (Bar_line::has_interface (info.grob ()))
72 custos_permitted = true;
73 else if (Note_head::has_interface (info.grob ())
75 && m->is_mus_type ("note-event"))
79 ideally, we'd do custos->set_parent (Y_AXIS, notehead),
80 but since the note head lives on the other system, we can't
82 So we copy the position from the note head pitch. We
83 don't look at the staff-position, since we can't be sure
84 whether Clef_engraver already applied a vertical shift.
86 pitches_.push (*unsmob_pitch (m->get_property ("pitch")));
92 Custos_engraver::process_acknowledged_grobs ()
94 if (scm_is_string (get_property ("whichBar")))
95 custos_permitted = true;
99 for (int i = pitches_.size (); i--;)
101 Item *c = create_custos ();
103 int p = pitches_[i].steps ();
104 SCM c0 = get_property ("middleCPosition");
105 if (scm_is_number (c0))
106 p += scm_to_int (c0);
108 c->set_property ("staff-position",
117 Custos_engraver::create_custos ()
119 Item *custos = make_item ("Custos", SCM_EOL);
121 custodes_.push (custos);
127 Custos_engraver::finalize ()
129 for (int i = custodes_.size (); i--;)
131 custodes_[i]->suicide ();
136 ADD_TRANSLATOR (Custos_engraver,
138 /* creats*/ "Custos",
140 /* acks */ "bar-line-interface note-head-interface",