2 ambitus-engraver.cc -- implement Ambitus_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2004 Juergen Reuter <reuter@ipd.uka.de>
8 Han-Wen Nienhuys <hanwen@xs4all.nl
12 #include "engraver.hh"
13 #include "note-head.hh"
14 #include "pitch-interval.hh"
15 #include "protected-scm.hh"
16 #include "staff-symbol-referencer.hh"
17 #include "axis-group-interface.hh"
18 #include "side-position-interface.hh"
20 class Ambitus_engraver : public Engraver
23 TRANSLATOR_DECLARATIONS (Ambitus_engraver);
24 virtual void process_music ();
25 virtual void acknowledge_grob (Grob_info);
26 virtual void stop_translation_timestep ();
27 virtual void finalize ();
28 virtual void derived_mark () const;
31 void create_ambitus ();
34 Drul_array<Item *> heads_;
35 Drul_array<Item *> accidentals_;
36 Pitch_interval pitch_interval_;
43 Ambitus_engraver::derived_mark () const
45 scm_gc_mark (start_key_sig_);
49 Ambitus_engraver::create_ambitus ()
51 ambitus_ = make_item ("AmbitusLine",SCM_EOL);
52 group_ = make_item ("Ambitus",SCM_EOL);
56 heads_[d] = make_item ("AmbitusNoteHead", SCM_EOL);
57 accidentals_[d] = make_item ("AmbitusAccidental", SCM_EOL);
58 accidentals_[d]->set_parent (heads_[d], Y_AXIS);
59 heads_[d]->set_property ("accidental-grob", accidentals_[d]->self_scm ());
60 Axis_group_interface::add_element (group_, heads_[d]);
61 Axis_group_interface::add_element (group_, accidentals_[d]);
62 Side_position_interface::add_support (accidentals_[d], heads_[d]);
64 while (flip (&d) != DOWN);
65 ambitus_->set_parent (heads_[DOWN], X_AXIS);
66 Axis_group_interface::add_element (group_, ambitus_);
72 Ambitus_engraver::Ambitus_engraver ()
75 heads_[LEFT] = heads_[RIGHT] = 0;
76 accidentals_[LEFT] = accidentals_[RIGHT] = 0;
79 start_key_sig_ = SCM_EOL;
83 Ambitus_engraver::process_music ()
86 * Ensure that ambitus is created in the very first timestep (on
87 * which lily does not call start_translation_timestep ()).
88 * Otherwise, if a voice begins with a rest, the ambitus grob will
89 * be placed after the rest.
98 Ambitus_engraver::stop_translation_timestep ()
100 if (ambitus_ && !is_typeset_)
103 * Evaluate middleCPosition not until now, since otherwise we
104 * may then oversee a clef that is defined in a staff context if
105 * we are in a voice context; middleCPosition would then be
108 start_c0_ = robust_scm2int (get_property ("middleCPosition"), 0);
109 start_key_sig_ = get_property ("keySignature");
117 Ambitus_engraver::acknowledge_grob (Grob_info info)
119 Item *item = dynamic_cast <Item *>(info.grob_);
122 if (Note_head::has_interface (info.grob_))
124 Music *nr = info.music_cause ();
125 if (nr && nr->is_mus_type ("note-event"))
127 Pitch pitch = *unsmob_pitch (nr->get_property ("pitch"));
128 pitch_interval_.add_point (pitch);
135 Ambitus_engraver::finalize ()
137 if (ambitus_ && !pitch_interval_.is_empty ())
142 Pitch p = pitch_interval_[d];
143 heads_[d]->set_property ("staff-position",
144 scm_from_int (start_c0_ +
147 SCM handle = scm_assoc (scm_cons (scm_from_int (p.get_octave ()),
148 scm_from_int (p.get_notename ())),
151 if (handle == SCM_BOOL_F)
152 handle = scm_assoc (scm_from_int (p.get_notename ()),
155 int sig_alter = (handle != SCM_BOOL_F) ? scm_to_int (scm_cdr (handle)) : 0;
156 if (sig_alter == p.get_alteration ())
158 accidentals_[d]->suicide();
159 heads_[d]->set_property ("accidental-grob", SCM_EOL);
163 accidentals_[d]->set_property ("accidentals",
164 scm_list_1 (scm_from_int (p.get_alteration ())));
167 while (flip (&d) != DOWN);
169 ambitus_->set_property ("note-heads", scm_list_2 (heads_[DOWN]->self_scm (),
170 heads_[UP]->self_scm ()));
177 accidentals_[d]->suicide();
178 heads_[d]->suicide();
180 while (flip (&d) != DOWN);
185 ADD_TRANSLATOR (Ambitus_engraver,
187 /* creats*/ "Ambitus AmbitusLine AmbitusNoteHead AmbitusAccidental",
189 /* acks */ "note-head-interface",