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 () ;
54 if (r_l && r_l->access_Clef_change_req ())
58 else if (info.elem_l_->is_type_b (Bar::static_name ())
59 && accidental_idx_arr_.size ())
62 default_key_b_ = true;
69 Key_engraver::do_process_requests ()
78 Key_engraver::do_pre_move_processing ()
82 kit_p_->default_b_ = default_key_b_;
83 typeset_element (kit_p_);
93 Key_engraver::read_req (Key_change_req const * r)
95 old_accidental_idx_arr_ = accidental_idx_arr_;
97 Scalar prop = get_property ("specialaccidentals");
98 if (prop.length_i () > 0)
100 key_.multi_octave_b_ = prop.to_bool ();
103 accidental_idx_arr_.clear ();
105 if (r->ordinary_key_b_)
108 if (r->pitch_arr_.size () < 1)
110 r->warning (_ ("No key name: assuming `C'"));
115 p = r->pitch_arr_[0].semitone_pitch ();
119 /* Solve the equation 7*no_of_acc mod 12 = p, -6 <= no_of_acc <= 5 */
120 int no_of_acc = (7*p) % 12;
121 no_of_acc = (no_of_acc + 18) % 12 -6;
123 /* Correct from flats to sharps or vice versa */
124 if (no_of_acc * r->pitch_arr_[0].accidental_i_ < 0)
125 no_of_acc += 12 * sign (r->pitch_arr_[0].accidental_i_);
129 int accidental = 6 ; // First accidental: bes
130 for ( ; no_of_acc < 0 ; no_of_acc++ )
133 m.accidental_i_ = -1;
134 m.notename_i_ = accidental;
135 if (key_.multi_octave_b_)
138 key_.set (m.notename_i_, m.accidental_i_);
139 accidental_idx_arr_.push (m);
141 accidental = (accidental + 3) % 7 ;
146 int accidental = 3 ; // First accidental: fis
147 for ( ; no_of_acc > 0 ; no_of_acc-- )
151 m.notename_i_ = accidental;
152 if (key_.multi_octave_b_)
155 key_.set (m.notename_i_, m.accidental_i_);
156 accidental_idx_arr_.push (m);
158 accidental = (accidental + 4) % 7 ;
164 for (int i = 0; i < r->pitch_arr_.size (); i ++)
166 Musical_pitch m_l =r->pitch_arr_[i];
167 if (key_.multi_octave_b_)
170 key_.set (m_l.notename_i_, m_l.accidental_i_);
172 accidental_idx_arr_.push (m_l);
178 Key_engraver::do_post_move_processing ()
181 default_key_b_ = false;
185 IMPLEMENT_IS_TYPE_B1 (Key_engraver,Engraver);
186 ADD_THIS_TRANSLATOR (Key_engraver);