2 ambitus-engraver.cc -- implement Ambitus_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2006 Juergen Reuter <reuter@ipd.uka.de>
8 Han-Wen Nienhuys <hanwen@xs4all.nl
11 #include "engraver.hh"
13 #include "axis-group-interface.hh"
14 #include "note-head.hh"
15 #include "pitch-interval.hh"
16 #include "pointer-group-interface.hh"
17 #include "protected-scm.hh"
18 #include "side-position-interface.hh"
19 #include "staff-symbol-referencer.hh"
20 #include "stream-event.hh"
22 #include "translator.icc"
24 class Ambitus_engraver : public Engraver
27 TRANSLATOR_DECLARATIONS (Ambitus_engraver);
28 void process_music ();
29 void acknowledge_note_head (Grob_info);
30 void stop_translation_timestep ();
31 virtual void finalize ();
32 virtual void derived_mark () const;
35 void create_ambitus ();
38 Drul_array<Item *> heads_;
39 Drul_array<Item *> accidentals_;
40 Pitch_interval pitch_interval_;
47 Ambitus_engraver::derived_mark () const
49 scm_gc_mark (start_key_sig_);
53 Ambitus_engraver::create_ambitus ()
55 ambitus_ = make_item ("AmbitusLine", SCM_EOL);
56 group_ = make_item ("Ambitus", SCM_EOL);
60 heads_[d] = make_item ("AmbitusNoteHead", SCM_EOL);
61 accidentals_[d] = make_item ("AmbitusAccidental", SCM_EOL);
62 accidentals_[d]->set_parent (heads_[d], Y_AXIS);
63 heads_[d]->set_object ("accidental-grob",
64 accidentals_[d]->self_scm ());
65 Axis_group_interface::add_element (group_, heads_[d]);
66 Axis_group_interface::add_element (group_, accidentals_[d]);
67 Side_position_interface::add_support (accidentals_[d], heads_[d]);
69 while (flip (&d) != DOWN);
71 ambitus_->set_parent (heads_[DOWN], X_AXIS);
72 Axis_group_interface::add_element (group_, ambitus_);
77 Ambitus_engraver::Ambitus_engraver ()
80 heads_[LEFT] = heads_[RIGHT] = 0;
81 accidentals_[LEFT] = accidentals_[RIGHT] = 0;
84 start_key_sig_ = SCM_EOL;
88 Ambitus_engraver::process_music ()
91 * Ensure that ambitus is created in the very first timestep (on
92 * which lily does not call start_translation_timestep ()).
93 * Otherwise, if a voice begins with a rest, the ambitus grob will
94 * be placed after the rest.
101 Ambitus_engraver::stop_translation_timestep ()
103 if (ambitus_ && !is_typeset_)
106 * Evaluate middleCPosition not until now, since otherwise we
107 * may then oversee a clef that is defined in a staff context if
108 * we are in a voice context; middleCPosition would then be
111 start_c0_ = robust_scm2int (get_property ("middleCPosition"), 0);
112 start_key_sig_ = get_property ("keySignature");
119 Ambitus_engraver::acknowledge_note_head (Grob_info info)
121 Stream_event *nr = info.event_cause ();
122 if (nr && nr->in_event_class ("note-event"))
124 Pitch pitch = *unsmob_pitch (nr->get_property ("pitch"));
125 pitch_interval_.add_point (pitch);
130 Ambitus_engraver::finalize ()
132 if (ambitus_ && !pitch_interval_.is_empty ())
137 Pitch p = pitch_interval_[d];
138 heads_[d]->set_property ("staff-position",
139 scm_from_int (start_c0_
142 SCM handle = scm_assoc (scm_cons (scm_from_int (p.get_octave ()),
143 scm_from_int (p.get_notename ())),
146 if (handle == SCM_BOOL_F)
147 handle = scm_assoc (scm_from_int (p.get_notename ()),
150 int sig_alter = (handle != SCM_BOOL_F)
151 ? scm_to_int (scm_cdr (handle)) : 0;
153 if (sig_alter == p.get_alteration ())
155 accidentals_[d]->suicide ();
156 heads_[d]->set_object ("accidental-grob", SCM_EOL);
160 SCM l = scm_list_1 (scm_from_int (p.get_alteration ()));
161 accidentals_[d]->set_property ("accidentals", l);
164 while (flip (&d) != DOWN);
167 Pointer_group_interface::add_grob (ambitus_, ly_symbol2scm ("note-heads"), heads_[DOWN]);
168 Pointer_group_interface::add_grob (ambitus_, ly_symbol2scm ("note-heads"), heads_[UP]);
175 accidentals_[d]->suicide ();
176 heads_[d]->suicide ();
178 while (flip (&d) != DOWN);
180 ambitus_->suicide ();
184 ADD_ACKNOWLEDGER (Ambitus_engraver, note_head);
185 ADD_TRANSLATOR (Ambitus_engraver,