2 key-reg.cc -- implement Key_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1998 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 kit_p_ = new Key_item;
30 kit_p_->break_priority_i_ = -1; // ugh
31 announce_element (Score_element_info (kit_p_,keyreq_l_));
32 kit_p_->set (key_.multi_octave_b_, accidental_idx_arr_, old_accidental_idx_arr_);
37 Key_engraver::do_try_request (Request * req_l)
39 if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
42 warning ("Fixme: key change merge.");
51 Key_engraver::acknowledge_element (Score_element_info info)
53 if (dynamic_cast <Clef_change_req *> (info.req_l_))
55 int i= get_property ("createKeyOnClefChange").length_i ();
59 else if (dynamic_cast<Bar *> (info.elem_l_)
60 && accidental_idx_arr_.size ())
63 default_key_b_ = true;
70 Key_engraver::do_process_requests ()
79 Key_engraver::do_pre_move_processing ()
83 kit_p_->default_b_ = default_key_b_;
84 typeset_element (kit_p_);
94 Key_engraver::read_req (Key_change_req const * r)
96 old_accidental_idx_arr_ = accidental_idx_arr_;
98 Scalar prop = get_property ("keyoctaviation");
99 if (prop.length_i () > 0)
101 key_.multi_octave_b_ = ! prop.to_bool ();
104 accidental_idx_arr_.clear ();
106 if (r->ordinary_key_b_)
109 if (r->pitch_arr_.size () < 1)
111 r->warning (_ ("No key name: assuming `C'"));
116 p = r->pitch_arr_[0].semitone_pitch ();
120 /* Solve the equation 7*no_of_acc mod 12 = p, -6 <= no_of_acc <= 5 */
121 int no_of_acc = (7*p) % 12;
122 no_of_acc = (no_of_acc + 18) % 12 -6;
124 /* Correct from flats to sharps or vice versa */
125 if (no_of_acc * r->pitch_arr_[0].accidental_i_ < 0)
126 no_of_acc += 12 * sign (r->pitch_arr_[0].accidental_i_);
130 int accidental = 6 ; // First accidental: bes
131 for ( ; no_of_acc < 0 ; no_of_acc++ )
134 m.accidental_i_ = -1;
135 m.notename_i_ = accidental;
136 if (key_.multi_octave_b_)
139 key_.set (m.notename_i_, m.accidental_i_);
140 accidental_idx_arr_.push (m);
142 accidental = (accidental + 3) % 7 ;
147 int accidental = 3 ; // First accidental: fis
148 for ( ; no_of_acc > 0 ; no_of_acc-- )
152 m.notename_i_ = accidental;
153 if (key_.multi_octave_b_)
156 key_.set (m.notename_i_, m.accidental_i_);
157 accidental_idx_arr_.push (m);
159 accidental = (accidental + 4) % 7 ;
165 for (int i = 0; i < r->pitch_arr_.size (); i ++)
167 Musical_pitch m_l =r->pitch_arr_[i];
168 if (key_.multi_octave_b_)
171 key_.set (m_l.notename_i_, m_l.accidental_i_);
173 accidental_idx_arr_.push (m_l);
179 Key_engraver::do_post_move_processing ()
182 default_key_b_ = false;
183 old_accidental_idx_arr_.clear ();
187 IMPLEMENT_IS_TYPE_B1 (Key_engraver,Engraver);
188 ADD_THIS_TRANSLATOR (Key_engraver);