2 ambitus-engraver.cc -- implement Ambitus_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2007 Juergen Reuter <reuter@ipd.uka.de>
8 Han-Wen Nienhuys <hanwen@xs4all.nl
11 #include "engraver.hh"
13 #include "accidental-placement.hh"
14 #include "axis-group-interface.hh"
16 #include "note-head.hh"
17 #include "pitch-interval.hh"
18 #include "pointer-group-interface.hh"
19 #include "protected-scm.hh"
20 #include "side-position-interface.hh"
21 #include "separation-item.hh"
22 #include "staff-symbol-referencer.hh"
23 #include "stream-event.hh"
25 #include "translator.icc"
27 class Ambitus_engraver : public Engraver
30 TRANSLATOR_DECLARATIONS (Ambitus_engraver);
31 void process_music ();
32 void acknowledge_note_head (Grob_info);
33 void stop_translation_timestep ();
34 virtual void finalize ();
35 virtual void derived_mark () const;
38 void create_ambitus ();
41 Drul_array<Item *> heads_;
42 Drul_array<Item *> accidentals_;
43 Drul_array<Stream_event *> causes_;
44 Pitch_interval pitch_interval_;
51 Ambitus_engraver::derived_mark () const
53 scm_gc_mark (start_key_sig_);
57 Ambitus_engraver::create_ambitus ()
59 ambitus_ = make_item ("AmbitusLine", SCM_EOL);
60 group_ = make_item ("Ambitus", SCM_EOL);
64 heads_[d] = make_item ("AmbitusNoteHead", SCM_EOL);
65 accidentals_[d] = make_item ("AmbitusAccidental", SCM_EOL);
66 accidentals_[d]->set_parent (heads_[d], Y_AXIS);
67 heads_[d]->set_object ("accidental-grob",
68 accidentals_[d]->self_scm ());
69 Axis_group_interface::add_element (group_, heads_[d]);
70 Axis_group_interface::add_element (group_, accidentals_[d]);
72 while (flip (&d) != DOWN);
74 ambitus_->set_parent (heads_[DOWN], X_AXIS);
75 Axis_group_interface::add_element (group_, ambitus_);
80 Ambitus_engraver::Ambitus_engraver ()
83 heads_[LEFT] = heads_[RIGHT] = 0;
84 accidentals_[LEFT] = accidentals_[RIGHT] = 0;
87 start_key_sig_ = SCM_EOL;
91 Ambitus_engraver::process_music ()
94 * Ensure that ambitus is created in the very first timestep
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 Direction expand_dir = pitch_interval_.add_point (pitch);
127 causes_[expand_dir] = nr;
132 Ambitus_engraver::finalize ()
134 if (ambitus_ && !pitch_interval_.is_empty ())
136 Grob * accidental_placement =
137 make_item ("AccidentalPlacement",
138 accidentals_[DOWN]->self_scm ());
143 Pitch p = pitch_interval_[d];
144 heads_[d]->set_property ("cause", causes_[d]->self_scm());
145 heads_[d]->set_property ("staff-position",
146 scm_from_int (start_c0_
149 SCM handle = scm_assoc (scm_cons (scm_from_int (p.get_octave ()),
150 scm_from_int (p.get_notename ())),
153 if (handle == SCM_BOOL_F)
154 handle = scm_assoc (scm_from_int (p.get_notename ()),
157 Rational sig_alter = (handle != SCM_BOOL_F)
158 ? robust_scm2rational (scm_cdr (handle), Rational (0)) : Rational (0);
160 if (sig_alter == p.get_alteration ())
162 accidentals_[d]->suicide ();
163 heads_[d]->set_object ("accidental-grob", SCM_EOL);
167 accidentals_[d]->set_property ("alteration", ly_rational2scm (p.get_alteration ()));
169 Separation_item::add_conditional_item (heads_[d], accidental_placement);
170 Accidental_placement::add_accidental (accidental_placement, accidentals_[d]);
172 while (flip (&d) != DOWN);
175 Pointer_group_interface::add_grob (ambitus_, ly_symbol2scm ("note-heads"), heads_[DOWN]);
176 Pointer_group_interface::add_grob (ambitus_, ly_symbol2scm ("note-heads"), heads_[UP]);
177 Axis_group_interface::add_element (group_, accidental_placement);
184 accidentals_[d]->suicide ();
185 heads_[d]->suicide ();
187 while (flip (&d) != DOWN);
189 ambitus_->suicide ();
193 ADD_ACKNOWLEDGER (Ambitus_engraver, note_head);
194 ADD_TRANSLATOR (Ambitus_engraver,