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"
21 #include "translator.icc"
23 class Ambitus_engraver : public Engraver
26 TRANSLATOR_DECLARATIONS (Ambitus_engraver);
27 void process_music ();
28 void acknowledge_note_head (Grob_info);
29 void stop_translation_timestep ();
30 virtual void finalize ();
31 virtual void derived_mark () const;
34 void create_ambitus ();
37 Drul_array<Item *> heads_;
38 Drul_array<Item *> accidentals_;
39 Pitch_interval pitch_interval_;
46 Ambitus_engraver::derived_mark () const
48 scm_gc_mark (start_key_sig_);
52 Ambitus_engraver::create_ambitus ()
54 ambitus_ = make_item ("AmbitusLine", SCM_EOL);
55 group_ = make_item ("Ambitus", SCM_EOL);
59 heads_[d] = make_item ("AmbitusNoteHead", SCM_EOL);
60 accidentals_[d] = make_item ("AmbitusAccidental", SCM_EOL);
61 accidentals_[d]->set_parent (heads_[d], Y_AXIS);
62 heads_[d]->set_object ("accidental-grob",
63 accidentals_[d]->self_scm ());
64 Axis_group_interface::add_element (group_, heads_[d]);
65 Axis_group_interface::add_element (group_, accidentals_[d]);
66 Side_position_interface::add_support (accidentals_[d], heads_[d]);
68 while (flip (&d) != DOWN);
70 ambitus_->set_parent (heads_[DOWN], X_AXIS);
71 Axis_group_interface::add_element (group_, ambitus_);
76 Ambitus_engraver::Ambitus_engraver ()
79 heads_[LEFT] = heads_[RIGHT] = 0;
80 accidentals_[LEFT] = accidentals_[RIGHT] = 0;
83 start_key_sig_ = SCM_EOL;
87 Ambitus_engraver::process_music ()
90 * Ensure that ambitus is created in the very first timestep (on
91 * which lily does not call start_translation_timestep ()).
92 * Otherwise, if a voice begins with a rest, the ambitus grob will
93 * be placed after the rest.
100 Ambitus_engraver::stop_translation_timestep ()
102 if (ambitus_ && !is_typeset_)
105 * Evaluate middleCPosition not until now, since otherwise we
106 * may then oversee a clef that is defined in a staff context if
107 * we are in a voice context; middleCPosition would then be
110 start_c0_ = robust_scm2int (get_property ("middleCPosition"), 0);
111 start_key_sig_ = get_property ("keySignature");
118 Ambitus_engraver::acknowledge_note_head (Grob_info info)
120 Music *nr = info.music_cause ();
121 if (nr && nr->is_mus_type ("note-event"))
123 Pitch pitch = *unsmob_pitch (nr->get_property ("pitch"));
124 pitch_interval_.add_point (pitch);
129 Ambitus_engraver::finalize ()
131 if (ambitus_ && !pitch_interval_.is_empty ())
136 Pitch p = pitch_interval_[d];
137 heads_[d]->set_property ("staff-position",
138 scm_from_int (start_c0_
141 SCM handle = scm_assoc (scm_cons (scm_from_int (p.get_octave ()),
142 scm_from_int (p.get_notename ())),
145 if (handle == SCM_BOOL_F)
146 handle = scm_assoc (scm_from_int (p.get_notename ()),
149 int sig_alter = (handle != SCM_BOOL_F)
150 ? scm_to_int (scm_cdr (handle)) : 0;
152 if (sig_alter == p.get_alteration ())
154 accidentals_[d]->suicide ();
155 heads_[d]->set_object ("accidental-grob", SCM_EOL);
159 SCM l = scm_list_1 (scm_from_int (p.get_alteration ()));
160 accidentals_[d]->set_property ("accidentals", l);
163 while (flip (&d) != DOWN);
166 Pointer_group_interface::add_grob (ambitus_, ly_symbol2scm ("note-heads"), heads_[DOWN]);
167 Pointer_group_interface::add_grob (ambitus_, ly_symbol2scm ("note-heads"), heads_[UP]);
174 accidentals_[d]->suicide ();
175 heads_[d]->suicide ();
177 while (flip (&d) != DOWN);
179 ambitus_->suicide ();
183 ADD_ACKNOWLEDGER (Ambitus_engraver, note_head);
184 ADD_TRANSLATOR (Ambitus_engraver,
186 /* create */ "Ambitus AmbitusLine AmbitusNoteHead AmbitusAccidental",