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 kit_p_ = new Key_item;
30 kit_p_->break_priority_i_ = -1; // ugh
31 kit_p_->multi_octave_b_ = key_.multi_octave_b_;
32 announce_element (Score_element_info (kit_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 kit_p_->add (m_l.steps (), a);
42 kit_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 kit_p_->add_old (m_l.steps (), a);
52 kit_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 ())
85 default_key_b_ = true;
92 Key_engraver::do_process_requests ()
101 Key_engraver::do_pre_move_processing ()
105 kit_p_->default_b_ = default_key_b_;
106 typeset_element (kit_p_);
116 Key_engraver::read_req (Key_change_req const * r)
118 old_accidental_idx_arr_ = accidental_idx_arr_;
120 Scalar prop = get_property ("keyoctaviation", 0);
121 if (prop.length_i () > 0)
123 key_.multi_octave_b_ = ! prop.to_bool ();
126 accidental_idx_arr_.clear ();
128 if (r->ordinary_key_b_)
131 if (r->pitch_arr_.size () < 1)
133 r->warning (_ ("No key name: assuming `C'"));
138 p = r->pitch_arr_[0].semitone_pitch ();
141 /* Solve the equation 7*no_of_acc mod 12 = p, -6 <= no_of_acc <= 5 */
142 int no_of_acc = (7*p) % 12;
143 no_of_acc = (no_of_acc + 18) % 12 -6;
145 /* Correct from flats to sharps or vice versa */
146 if (no_of_acc * r->pitch_arr_[0].accidental_i_ < 0)
147 no_of_acc += 12 * sign (r->pitch_arr_[0].accidental_i_);
151 int accidental = 6 ; // First accidental: bes
152 for ( ; no_of_acc < 0 ; no_of_acc++ )
155 m.accidental_i_ = -1;
156 m.notename_i_ = accidental;
157 if (key_.multi_octave_b_)
160 key_.set (m.notename_i_, m.accidental_i_);
161 accidental_idx_arr_.push (m);
163 accidental = (accidental + 3) % 7 ;
168 int accidental = 3 ; // First accidental: fis
169 for ( ; no_of_acc > 0 ; no_of_acc-- )
173 m.notename_i_ = accidental;
174 if (key_.multi_octave_b_)
177 key_.set (m.notename_i_, m.accidental_i_);
178 accidental_idx_arr_.push (m);
180 accidental = (accidental + 4) % 7 ;
186 for (int i = 0; i < r->pitch_arr_.size (); i ++)
188 Musical_pitch m_l =r->pitch_arr_[i];
189 if (key_.multi_octave_b_)
192 key_.set (m_l.notename_i_, m_l.accidental_i_);
194 accidental_idx_arr_.push (m_l);
200 Key_engraver::do_post_move_processing ()
203 default_key_b_ = false;
204 old_accidental_idx_arr_.clear ();
209 ADD_THIS_TRANSLATOR (Key_engraver);