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_));
37 Key_engraver::do_try_request (Request * req_l)
39 Command_req* creq_l= req_l->access_Command_req ();
40 if (!creq_l|| !creq_l->access_Key_change_req ())
45 keyreq_l_ = creq_l->access_Key_change_req ();
51 Key_engraver::acknowledge_element (Score_element_info info)
53 Command_req * r_l = info.req_l_->access_Command_req () ;
55 if (r_l && r_l->access_Clef_change_req ())
57 int i= get_property ("createKeyOnClefChange").length_i ();
61 else if (info.elem_l_->is_type_b (Bar::static_name ())
62 && accidental_idx_arr_.size ())
65 default_key_b_ = true;
72 Key_engraver::do_process_requests ()
81 Key_engraver::do_pre_move_processing ()
85 kit_p_->default_b_ = default_key_b_;
86 typeset_element (kit_p_);
96 Key_engraver::read_req (Key_change_req const * r)
99 old_accidental_idx_arr_ = accidental_idx_arr_;
101 Scalar prop = get_property ("keyoctaviation");
102 if (prop.length_i () > 0)
104 key_.multi_octave_b_ = ! prop.to_bool ();
106 prop = get_property ("keymodality");
112 accidental_idx_arr_.clear ();
114 if (r->ordinary_key_b_)
117 if (r->pitch_arr_.size () < 1)
119 r->warning (_ ("No key name: assuming `C'"));
124 p = r->pitch_arr_[0].semitone_pitch ();
127 /* Solve the equation 7*no_of_acc mod 12 = p, -6 <= no_of_acc <= 5 */
128 int no_of_acc = (7*p) % 12;
129 no_of_acc = (no_of_acc + 18) % 12 -6;
131 /* Correct from flats to sharps or vice versa */
132 if (no_of_acc * r->pitch_arr_[0].accidental_i_ < 0)
133 no_of_acc += 12 * sign (r->pitch_arr_[0].accidental_i_);
137 int accidental = 6 ; // First accidental: bes
138 for ( ; no_of_acc < 0 ; no_of_acc++ )
141 m.accidental_i_ = -1;
142 m.notename_i_ = accidental;
143 if (key_.multi_octave_b_)
146 key_.set (m.notename_i_, m.accidental_i_);
147 accidental_idx_arr_.push (m);
149 accidental = (accidental + 3) % 7 ;
154 int accidental = 3 ; // First accidental: fis
155 for ( ; no_of_acc > 0 ; no_of_acc-- )
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 + 4) % 7 ;
172 for (int i = 0; i < r->pitch_arr_.size (); i ++)
174 Musical_pitch m_l =r->pitch_arr_[i];
175 if (key_.multi_octave_b_)
178 key_.set (m_l.notename_i_, m_l.accidental_i_);
180 accidental_idx_arr_.push (m_l);
186 Key_engraver::do_post_move_processing ()
189 default_key_b_ = false;
190 old_accidental_idx_arr_.clear ();
194 IMPLEMENT_IS_TYPE_B1 (Key_engraver,Engraver);
195 ADD_THIS_TRANSLATOR (Key_engraver);