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 "staff-symbol-referencer.hh"
15 #include "translator-group.hh"
16 #include "engraver.hh"
18 #include "protected-scm.hh"
22 Make the key signature.
24 class Key_engraver : public Engraver
26 void create_key (bool);
27 void read_req (Key_change_req const * r);
28 Key_change_req * keyreq_l_;
32 TRANSLATOR_DECLARATIONS(Key_engraver);
35 virtual void initialize ();
36 virtual void finalize ();
37 virtual bool try_music (Music *req_l);
38 virtual void stop_translation_timestep ();
39 virtual void start_translation_timestep ();
40 virtual void create_grobs ();
41 virtual void acknowledge_grob (Grob_info);
46 Key_engraver::finalize ()
51 Key_engraver::Key_engraver ()
59 Key_engraver::create_key (bool def)
63 item_p_ = new Item (get_property ("KeySignature"));
65 item_p_->set_grob_property ("c0-position",
66 get_property ("centralCPosition"));
68 // todo: put this in basic props.
69 item_p_->set_grob_property ("old-accidentals", get_property ("lastKeySignature"));
70 item_p_->set_grob_property ("new-accidentals", get_property ("keySignature"));
72 Staff_symbol_referencer::set_interface (item_p_);
73 Key_item::set_interface (item_p_);
74 announce_grob (item_p_,keyreq_l_);
79 SCM vis = get_property ("explicitKeySignatureVisibility");
80 if (gh_procedure_p (vis))
81 item_p_->set_grob_property ("visibility-lambda",vis);
87 Key_engraver::try_music (Music * req_l)
89 if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
91 if (keyreq_l_ && !keyreq_l_->equal_b (kc))
93 kc->origin ()->warning (_ ("Conflicting key signatures found."));
94 keyreq_l_->origin ()->warning (_ ("This was the other key definition."));
107 Key_engraver::acknowledge_grob (Grob_info info)
109 if (Clef::has_interface (info.grob_l_))
111 SCM c = get_property ("createKeyOnClefChange");
117 else if (Bar::has_interface (info.grob_l_)
118 && gh_pair_p (get_property ("keySignature")))
126 Key_engraver::create_grobs ()
129 get_property ("lastKeySignature") != get_property ("keySignature"))
135 Key_engraver::stop_translation_timestep ()
139 typeset_grob (item_p_);
146 Key_engraver::read_req (Key_change_req const * r)
148 SCM p = r->get_mus_property ("pitch-alist");
152 SCM n = scm_list_copy (p);
154 for (SCM s = get_property ("keyAccidentalOrder");
155 gh_pair_p (s); s = ly_cdr (s))
157 if (gh_pair_p (scm_member (ly_car (s), n)))
159 accs = gh_cons (ly_car (s), accs);
160 n = scm_delete_x (ly_car (s), n);
164 for (SCM s = n ; gh_pair_p (s); s = ly_cdr (s))
165 if (gh_scm2int (ly_cdar (s)))
166 accs = gh_cons (ly_car (s), accs);
168 daddy_trans_l_->set_property ("lastKeySignature",
169 get_property ("keySignature"));
170 daddy_trans_l_->set_property ("keySignature", accs);
175 Key_engraver::start_translation_timestep ()
178 daddy_trans_l_->set_property ("lastKeySignature", get_property ("keySignature"));
183 Key_engraver::initialize ()
185 daddy_trans_l_->set_property ("keySignature", SCM_EOL);
186 daddy_trans_l_->set_property ("lastKeySignature", SCM_EOL);
190 ENTER_DESCRIPTION(Key_engraver,
192 /* creats*/ "KeySignature",
193 /* acks */ "bar-line-interface clef-interface",
194 /* reads */ "keySignature lastKeySignature explicitKeySignatureVisibility createKeyOnClefChange keyAccidentalOrder keySignature",
195 /* write */ "lastKeySignature");