2 key-engraver.cc -- implement Key_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "key-engraver.hh"
10 #include "key-item.hh"
11 #include "command-request.hh"
12 #include "local-key-engraver.hh"
13 #include "musical-request.hh"
14 #include "local-key-item.hh"
16 #include "time-description.hh"
18 Key_engraver::Key_engraver ()
21 do_post_move_processing ();
25 Key_engraver::key_changed_b () const
31 Key_engraver::create_key ()
35 item_p_ = new Key_item;
36 item_p_->set_elt_property (break_priority_scm_sym, gh_int2scm(-1)); // ugh
37 item_p_->multi_octave_b_ = key_.multi_octave_b_;
38 announce_element (Score_element_info (item_p_,keyreq_l_));
41 for (int i = 0; i < accidental_idx_arr_.size(); i++)
43 Musical_pitch m_l =accidental_idx_arr_[i];
44 int a =m_l.accidental_i_;
45 if (key_.multi_octave_b_)
46 item_p_->add (m_l.steps (), a);
48 item_p_->add (m_l.notename_i_, a);
51 for (int i = 0 ; i< old_accidental_idx_arr_.size(); i++)
53 Musical_pitch m_l =old_accidental_idx_arr_[i];
54 int a =m_l.accidental_i_;
55 if (key_.multi_octave_b_)
56 item_p_->add_old (m_l.steps (), a);
58 item_p_->add_old (m_l.notename_i_, a);
65 Key_engraver::do_try_music (Music * req_l)
67 if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
70 warning ("Fixme: key change merge.");
79 Key_engraver::acknowledge_element (Score_element_info info)
81 if (dynamic_cast <Clef_change_req *> (info.req_l_))
83 int i= get_property ("createKeyOnClefChange", 0).length_i ();
87 else if (dynamic_cast<Bar *> (info.elem_l_)
88 && accidental_idx_arr_.size ())
90 bool def = (!item_p_);
94 item_p_->set_elt_property (visibility_lambda_scm_sym,
95 gh_eval_str ("postbreak_only_visibility"));
102 Key_engraver::do_process_requests ()
111 Key_engraver::do_pre_move_processing ()
115 typeset_element (item_p_);
125 Key_engraver::read_req (Key_change_req const * r)
127 old_accidental_idx_arr_ = accidental_idx_arr_;
129 Scalar prop = get_property ("keyoctaviation", 0);
130 if (prop.length_i () > 0)
132 key_.multi_octave_b_ = ! prop.to_bool ();
135 accidental_idx_arr_.clear ();
137 if (r->ordinary_key_b_)
140 if (r->pitch_arr_.size () < 1)
142 r->warning (_ ("No key name: assuming `C'"));
147 p = r->pitch_arr_[0].semitone_pitch ();
150 /* Solve the equation 7*no_of_acc mod 12 = p, -6 <= no_of_acc <= 5 */
151 int no_of_acc = (7*p) % 12;
152 no_of_acc = (no_of_acc + 18) % 12 -6;
154 /* Correct from flats to sharps or vice versa */
155 if (no_of_acc * r->pitch_arr_[0].accidental_i_ < 0)
156 no_of_acc += 12 * sign (r->pitch_arr_[0].accidental_i_);
160 int accidental = 6 ; // First accidental: bes
161 for ( ; no_of_acc < 0 ; no_of_acc++ )
164 m.accidental_i_ = -1;
165 m.notename_i_ = accidental;
166 if (key_.multi_octave_b_)
169 key_.set (m.notename_i_, m.accidental_i_);
170 accidental_idx_arr_.push (m);
172 accidental = (accidental + 3) % 7 ;
177 int accidental = 3 ; // First accidental: fis
178 for ( ; no_of_acc > 0 ; no_of_acc-- )
182 m.notename_i_ = accidental;
183 if (key_.multi_octave_b_)
186 key_.set (m.notename_i_, m.accidental_i_);
187 accidental_idx_arr_.push (m);
189 accidental = (accidental + 4) % 7 ;
195 for (int i = 0; i < r->pitch_arr_.size (); i ++)
197 Musical_pitch m_l =r->pitch_arr_[i];
198 if (key_.multi_octave_b_)
201 key_.set (m_l.notename_i_, m_l.accidental_i_);
203 accidental_idx_arr_.push (m_l);
209 Key_engraver::do_post_move_processing ()
212 old_accidental_idx_arr_.clear ();
217 ADD_THIS_TRANSLATOR (Key_engraver);