2 custos-engraver.cc -- implement Custos_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2004 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"
18 * This class implements an engraver for custos symbols.
20 * FIXME: note heads inside of ligatures (i.e. ligature heads) are
21 * sometimes not recognized by this engraver. --jr
23 class Custos_engraver : public Engraver
26 TRANSLATOR_DECLARATIONS (Custos_engraver);
27 virtual void start_translation_timestep ();
28 virtual void acknowledge_grob (Grob_info);
29 virtual void process_acknowledged_grobs ();
30 virtual void stop_translation_timestep ();
31 virtual void finalize ();
35 Item * create_custos ();
36 bool custos_permitted;
37 Link_array<Grob> custodes_;
38 Array<Pitch> pitches_;
41 Custos_engraver::Custos_engraver ()
43 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 ()
66 Custos_engraver::acknowledge_grob (Grob_info info)
68 Item *item = dynamic_cast <Item *> (info.grob_);
71 Music * m = info.music_cause ();
72 if (Bar_line::has_interface (info.grob_))
73 custos_permitted = true;
74 else if (Note_head::has_interface (info.grob_)
76 && m->is_mus_type ("note-event"))
80 ideally, we'd do custos->set_parent (Y_AXIS, notehead),
81 but since the note head lives on the other system, we can't
83 So we copy the position from the note head pitch. We
84 don't look at the staff-position, since we can't be sure
85 whether Clef_engraver already applied a vertical shift.
87 pitches_.push (*unsmob_pitch (m->get_property ("pitch")));
93 Custos_engraver::process_acknowledged_grobs ()
95 if (scm_is_string (get_property ("whichBar")))
96 custos_permitted = true;
100 for (int i = pitches_.size (); i--;)
102 Item *c = create_custos ();
104 int p = pitches_[i].steps ();
105 SCM c0 = get_property ("middleCPosition");
106 if (scm_is_number (c0))
107 p += scm_to_int (c0);
110 c->set_property ("staff-position",
120 Custos_engraver::create_custos ()
122 Item* custos = make_item ("Custos", SCM_EOL);
125 custodes_.push (custos);
131 Custos_engraver::finalize ()
133 for (int i = custodes_.size (); i--;)
135 custodes_[i]->suicide ();
142 ADD_TRANSLATOR (Custos_engraver,
144 /* creats*/ "Custos",
146 /* acks */ "bar-line-interface note-head-interface",