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 start_translation_timestep ();
29 virtual void acknowledge_grob (Grob_info);
30 virtual void process_acknowledged_grobs ();
31 virtual void stop_translation_timestep ();
32 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;
49 Custos_engraver::stop_translation_timestep ()
52 delay typeset until we're at the next moment, so we can silence custodes at the end of the piece.
54 for (int i = custodes_.size (); i--;)
56 typeset_grob (custodes_[i]);
60 custos_permitted = false;
64 Custos_engraver::start_translation_timestep ()
71 Custos_engraver::acknowledge_grob (Grob_info info)
73 Item *item = dynamic_cast <Item *> (info.grob_);
76 Music * m = info.music_cause();
77 if (Bar_line::has_interface (info.grob_))
78 custos_permitted = true;
79 else if (Note_head::has_interface (info.grob_)
81 && m->is_mus_type ("note-event"))
85 ideally, we'd do custos->set_parent (Y_AXIS, notehead),
86 but since the note head lives on the other system, we can't
88 So we copy the position from the note head pitch. We
89 don't look at the staff-position, since we can't be sure
90 whether Clef_engraver already applied a vertical shift.
92 pitches_.push (*unsmob_pitch (m->get_mus_property ("pitch")));
98 Custos_engraver::process_acknowledged_grobs ()
100 if (gh_string_p (get_property ("whichBar")))
101 custos_permitted = true;
103 if (custos_permitted)
105 for (int i = pitches_.size (); i--;)
107 Item *c = create_custos ();
109 int p = pitches_[i].steps ();
110 SCM c0 = get_property ("centralCPosition");
111 if (gh_number_p (c0))
112 p += gh_scm2int (c0);
115 c->set_grob_property ("staff-position",
125 Custos_engraver::create_custos ()
127 SCM basicProperties = get_property ("Custos");
128 Item* custos = new Item (basicProperties);
130 announce_grob(custos, SCM_EOL);
131 custodes_.push (custos);
137 Custos_engraver::finalize ()
139 for (int i = custodes_.size (); i--;)
141 custodes_[i]->suicide ();
142 typeset_grob (custodes_[i]);
149 ENTER_DESCRIPTION(Custos_engraver,
151 /* creats*/ "Custos",
153 /* acks */ "bar-line-interface note-head-interface",