2 custos-engraver.cc -- implement Custos_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2003 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"
19 * This class implements an engraver for custos symbols.
21 * FIXME: note heads inside of ligatures (i.e. ligature heads) are
22 * sometimes not recognized by this engraver. --jr
24 class Custos_engraver : public Engraver
27 TRANSLATOR_DECLARATIONS( Custos_engraver);
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 ()
50 for (int i = custodes_.size (); i--;)
52 typeset_grob (custodes_[i]);
56 delay clear until we're at the next moment, so we can silence
57 custodes at the end of the piece.
60 custos_permitted = false;
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_mus_property ("pitch")));
92 Custos_engraver::process_acknowledged_grobs ()
94 if (gh_string_p (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 ("centralCPosition");
105 if (gh_number_p (c0))
106 p += gh_scm2int (c0);
109 c->set_grob_property ("staff-position",
119 Custos_engraver::create_custos ()
121 SCM basicProperties = get_property ("Custos");
122 Item* custos = new Item (basicProperties);
124 announce_grob(custos, SCM_EOL);
125 custodes_.push (custos);
131 Custos_engraver::finalize ()
133 for (int i = custodes_.size (); i--;)
135 custodes_[i]->suicide ();
142 ENTER_DESCRIPTION(Custos_engraver,
144 /* creats*/ "Custos",
146 /* acks */ "bar-line-interface note-head-interface",