2 key-engraver.cc -- implement Key_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "command-request.hh"
11 #include "musical-request.hh"
14 #include "timing-translator.hh"
15 #include "staff-symbol-referencer.hh"
16 #include "translator-group.hh"
17 #include "engraver.hh"
19 #include "protected-scm.hh"
23 Make the key signature.
25 class Key_engraver : public Engraver
27 void create_key (bool);
28 void read_req (Key_change_req const * r);
29 Key_change_req * keyreq_l_;
33 TRANSLATOR_DECLARATIONS(Key_engraver);
36 virtual void initialize ();
37 virtual void finalize ();
38 virtual bool try_music (Music *req_l);
39 virtual void stop_translation_timestep ();
40 virtual void start_translation_timestep ();
41 virtual void create_grobs ();
42 virtual void acknowledge_grob (Grob_info);
47 Key_engraver::finalize ()
52 Key_engraver::Key_engraver ()
60 Key_engraver::create_key (bool def)
64 item_p_ = new Item (get_property ("KeySignature"));
66 item_p_->set_grob_property ("c0-position",
67 get_property ("centralCPosition"));
69 // todo: put this in basic props.
70 item_p_->set_grob_property ("old-accidentals", get_property ("lastKeySignature"));
71 item_p_->set_grob_property ("new-accidentals", get_property ("keySignature"));
73 Staff_symbol_referencer::set_interface (item_p_);
74 Key_item::set_interface (item_p_);
75 announce_grob (item_p_,keyreq_l_);
80 SCM vis = get_property ("explicitKeySignatureVisibility");
81 if (gh_procedure_p (vis))
82 item_p_->set_grob_property ("visibility-lambda",vis);
88 Key_engraver::try_music (Music * req_l)
90 if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
92 if (keyreq_l_ && !keyreq_l_->equal_b (kc))
94 kc->origin ()->warning (_ ("Conflicting key signatures found."));
95 keyreq_l_->origin ()->warning (_ ("This was the other key definition."));
108 Key_engraver::acknowledge_grob (Grob_info info)
110 if (Clef::has_interface (info.grob_l_))
112 SCM c = get_property ("createKeyOnClefChange");
118 else if (Bar::has_interface (info.grob_l_)
119 && gh_pair_p (get_property ("keySignature")))
127 Key_engraver::create_grobs ()
130 get_property ("lastKeySignature") != get_property ("keySignature"))
136 Key_engraver::stop_translation_timestep ()
140 typeset_grob (item_p_);
147 Key_engraver::read_req (Key_change_req const * r)
149 SCM p = r->get_mus_property ("pitch-alist");
153 SCM n = scm_list_copy (p);
155 for (SCM s = get_property ("keyAccidentalOrder");
156 gh_pair_p (s); s = ly_cdr (s))
158 if (gh_pair_p (scm_member (ly_car (s), n)))
160 accs = gh_cons (ly_car (s), accs);
161 n = scm_delete_x (ly_car (s), n);
165 for (SCM s = n ; gh_pair_p (s); s = ly_cdr (s))
166 if (gh_scm2int (ly_cdar (s)))
167 accs = gh_cons (ly_car (s), accs);
169 daddy_trans_l_->set_property ("lastKeySignature",
170 get_property ("keySignature"));
171 daddy_trans_l_->set_property ("keySignature", accs);
176 Key_engraver::start_translation_timestep ()
179 daddy_trans_l_->set_property ("lastKeySignature", get_property ("keySignature"));
184 Key_engraver::initialize ()
186 daddy_trans_l_->set_property ("keySignature", SCM_EOL);
187 daddy_trans_l_->set_property ("lastKeySignature", SCM_EOL);
191 ENTER_DESCRIPTION(Key_engraver,
193 /* creats*/ "KeySignature",
194 /* acks */ "bar-line-interface clef-interface",
195 /* reads */ "keySignature lastKeySignature explicitKeySignatureVisibility createKeyOnClefChange keyAccidentalOrder keySignature",
196 /* write */ "lastKeySignature");