2 key-engraver.cc -- implement Key_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "key-item.hh"
11 #include "command-request.hh"
12 #include "musical-request.hh"
13 #include "local-key-item.hh"
15 #include "timing-translator.hh"
16 #include "staff-symbol-referencer.hh"
17 #include "translator-group.hh"
18 #include "engraver.hh"
19 #include "musical-pitch.hh"
20 #include "protected-scm.hh"
21 #include "clef-item.hh"
24 Make the key signature.
26 class Key_engraver : public Engraver {
27 void create_key(bool);
28 void read_req (Key_change_req const * r);
33 VIRTUAL_COPY_CONS(Translator);
35 Key_change_req * keyreq_l_;
37 Protected_scm old_accs_;
40 virtual void do_creation_processing();
41 virtual bool do_try_music (Music *req_l);
42 virtual void do_process_music();
43 virtual void do_pre_move_processing();
44 virtual void do_post_move_processing();
45 virtual void acknowledge_element (Score_element_info);
49 Key_engraver::Key_engraver ()
56 Key_engraver::create_key (bool def)
60 item_p_ = new Key_item ( get_property ("basicKeyProperties"));
62 item_p_->set_elt_property ("c0-position", gh_int2scm (0));
64 // todo: put this in basic props.
65 item_p_->set_elt_property ("old-accidentals", old_accs_);
66 item_p_->set_elt_property ("new-accidentals", get_property ("keySignature"));
68 Staff_symbol_referencer_interface st (item_p_);
71 SCM prop = get_property ("keyOctaviation");
72 bool multi = to_boolean (prop);
75 item_p_->set_elt_property ("multi-octave", gh_bool2scm (multi));
77 announce_element (Score_element_info (item_p_,keyreq_l_));
81 item_p_->set_elt_property ("visibility-lambda",
82 scm_eval (ly_symbol2scm ("all-visible")));
88 Key_engraver::do_try_music (Music * req_l)
90 if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
93 warning (_ ("FIXME: key change merge"));
102 Key_engraver::acknowledge_element (Score_element_info info)
104 if (dynamic_cast <Clef_item *> (info.elem_l_))
106 SCM c = get_property ("createKeyOnClefChange");
112 else if (dynamic_cast<Bar *> (info.elem_l_)
113 && gh_pair_p (get_property ("keySignature")))
121 Key_engraver::do_process_music ()
123 if (keyreq_l_ || old_accs_ != get_property ("keySignature"))
130 Key_engraver::do_pre_move_processing ()
134 typeset_element (item_p_);
140 Key_engraver::read_req (Key_change_req const * r)
145 SCM n = scm_list_copy (r->key_->pitch_alist_);
147 for (SCM s = get_property ("keyAccidentalOrder");
148 gh_pair_p (s); s = gh_cdr (s))
150 if (gh_pair_p (scm_member (gh_car (s), n)))
152 accs = gh_cons (gh_car (s), accs);
153 n = scm_delete_x (gh_car (s), n);
156 for (SCM s = n ; gh_pair_p (s); s = gh_cdr (s))
157 if (gh_scm2int (gh_cdar (s)))
158 accs = gh_cons (gh_car (s), accs);
160 old_accs_ = get_property ("keySignature");
161 daddy_trans_l_->set_property ("keySignature", accs);
165 Key_engraver::do_post_move_processing ()
168 old_accs_ = get_property ("keySignature");
172 Key_engraver::do_creation_processing ()
174 daddy_trans_l_->set_property ("keySignature", SCM_EOL);
179 ADD_THIS_TRANSLATOR (Key_engraver);