2 custos-engraver.cc -- implement Custos_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2006 Juergen Reuter <reuter@ipd.uka.de>,
7 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "engraver.hh"
11 #include "bar-line.hh"
13 #include "note-head.hh"
14 #include "staff-symbol-referencer.hh"
18 #include "translator.icc"
21 * This class implements an engraver for custos symbols.
23 * FIXME: note heads inside of ligatures (i.e. ligature heads) are
24 * sometimes not recognized by this engraver. --jr
26 class Custos_engraver : public Engraver
29 TRANSLATOR_DECLARATIONS (Custos_engraver);
30 void start_translation_timestep ();
31 DECLARE_ACKNOWLEDGER (bar);
32 DECLARE_ACKNOWLEDGER (note_head);
33 void process_acknowledged ();
34 void stop_translation_timestep ();
35 virtual void finalize ();
38 Item *create_custos ();
39 bool custos_permitted_;
40 vector<Grob*> custodes_;
41 vector<Pitch> pitches_;
44 Custos_engraver::Custos_engraver ()
46 custos_permitted_ = false;
50 Custos_engraver::stop_translation_timestep ()
53 delay typeset until we're at the next moment, so we can silence custodes at the end of the piece.
57 custos_permitted_ = false;
61 Custos_engraver::start_translation_timestep ()
67 Custos_engraver::acknowledge_bar (Grob_info info)
70 custos_permitted_ = true;
74 Custos_engraver::acknowledge_note_head (Grob_info info)
76 Music *m = info.music_cause ();
77 if (m && m->is_mus_type ("note-event"))
81 ideally, we'd do custos->set_parent (Y_AXIS, notehead),
82 but since the note head lives on the other system, we can't
84 So we copy the position from the note head pitch. We
85 don't look at the staff-position, since we can't be sure
86 whether Clef_engraver already applied a vertical shift.
88 pitches_.push_back (*unsmob_pitch (m->get_property ("pitch")));
93 Custos_engraver::process_acknowledged ()
95 if (scm_is_string (get_property ("whichBar")))
96 custos_permitted_ = true;
98 if (custos_permitted_)
100 for (vsize 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);
109 c->set_property ("staff-position",
118 Custos_engraver::create_custos ()
120 Item *custos = make_item ("Custos", SCM_EOL);
122 custodes_.push_back (custos);
128 Custos_engraver::finalize ()
130 for (vsize i = custodes_.size (); i--;)
131 custodes_[i]->suicide ();
135 ADD_ACKNOWLEDGER (Custos_engraver, bar);
136 ADD_ACKNOWLEDGER (Custos_engraver, note_head);
138 ADD_TRANSLATOR (Custos_engraver,
140 /* create */ "Custos",