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::create_key ()
29 item_p_ = new Key_item;
30 item_p_->set_elt_property (break_priority_scm_sym, gh_int2scm(-1)); // ugh
31 item_p_->multi_octave_b_ = key_.multi_octave_b_;
32 announce_element (Score_element_info (item_p_,keyreq_l_));
35 for (int i = 0; i < accidental_idx_arr_.size(); i++)
37 Musical_pitch m_l =accidental_idx_arr_[i];
38 int a =m_l.accidental_i_;
39 if (key_.multi_octave_b_)
40 item_p_->add (m_l.steps (), a);
42 item_p_->add (m_l.notename_i_, a);
45 for (int i = 0 ; i< old_accidental_idx_arr_.size(); i++)
47 Musical_pitch m_l =old_accidental_idx_arr_[i];
48 int a =m_l.accidental_i_;
49 if (key_.multi_octave_b_)
50 item_p_->add_old (m_l.steps (), a);
52 item_p_->add_old (m_l.notename_i_, a);
59 Key_engraver::do_try_music (Music * req_l)
61 if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
64 warning ("Fixme: key change merge.");
73 Key_engraver::acknowledge_element (Score_element_info info)
75 if (dynamic_cast <Clef_change_req *> (info.req_l_))
77 int i= get_property ("createKeyOnClefChange", 0).length_i ();
81 else if (dynamic_cast<Bar *> (info.elem_l_)
82 && accidental_idx_arr_.size ())
84 bool def = (!item_p_);
88 item_p_->set_elt_property (visibility_lambda_scm_sym,
89 gh_eval_str ("postbreak_only_visibility"));
96 Key_engraver::do_process_requests ()
105 Key_engraver::do_pre_move_processing ()
109 typeset_element (item_p_);
119 Key_engraver::read_req (Key_change_req const * r)
121 old_accidental_idx_arr_ = accidental_idx_arr_;
123 Scalar prop = get_property ("keyoctaviation", 0);
124 if (prop.length_i () > 0)
126 key_.multi_octave_b_ = ! prop.to_bool ();
129 accidental_idx_arr_.clear ();
131 if (r->ordinary_key_b_)
134 if (r->pitch_arr_.size () < 1)
136 r->warning (_ ("No key name: assuming `C'"));
141 p = r->pitch_arr_[0].semitone_pitch ();
144 /* Solve the equation 7*no_of_acc mod 12 = p, -6 <= no_of_acc <= 5 */
145 int no_of_acc = (7*p) % 12;
146 no_of_acc = (no_of_acc + 18) % 12 -6;
148 /* Correct from flats to sharps or vice versa */
149 if (no_of_acc * r->pitch_arr_[0].accidental_i_ < 0)
150 no_of_acc += 12 * sign (r->pitch_arr_[0].accidental_i_);
154 int accidental = 6 ; // First accidental: bes
155 for ( ; no_of_acc < 0 ; no_of_acc++ )
158 m.accidental_i_ = -1;
159 m.notename_i_ = accidental;
160 if (key_.multi_octave_b_)
163 key_.set (m.notename_i_, m.accidental_i_);
164 accidental_idx_arr_.push (m);
166 accidental = (accidental + 3) % 7 ;
171 int accidental = 3 ; // First accidental: fis
172 for ( ; no_of_acc > 0 ; no_of_acc-- )
176 m.notename_i_ = accidental;
177 if (key_.multi_octave_b_)
180 key_.set (m.notename_i_, m.accidental_i_);
181 accidental_idx_arr_.push (m);
183 accidental = (accidental + 4) % 7 ;
189 for (int i = 0; i < r->pitch_arr_.size (); i ++)
191 Musical_pitch m_l =r->pitch_arr_[i];
192 if (key_.multi_octave_b_)
195 key_.set (m_l.notename_i_, m_l.accidental_i_);
197 accidental_idx_arr_.push (m_l);
203 Key_engraver::do_post_move_processing ()
206 old_accidental_idx_arr_.clear ();
211 ADD_THIS_TRANSLATOR (Key_engraver);