2 head-grav.cc -- part of GNU LilyPond
4 (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "rhythmic-head.hh"
10 #include "paper-def.hh"
11 #include "musical-request.hh"
13 #include "dot-column.hh"
14 #include "staff-symbol-referencer.hh"
16 #include "score-engraver.hh"
23 When we catch the note, we predict the end of the note. We keep the
24 requests living until we reach the predicted end-time.
26 Every time process_music() is called and there are note requests, we
27 figure out how long the note to typeset should be. It should be no
28 longer than what's specified, than what is left to do and it should
31 We copy the reqs into scratch note reqs, to make sure that we get
32 all durations exactly right.
35 class Completion_heads_engraver : public Engraver
37 Link_array<Item> note_p_arr_;
39 Link_array<Item> dot_p_arr_;
40 Link_array<Music> note_req_l_arr_;
41 Link_array<Music> scratch_note_reqs_;
47 Moment next_barline_moment ();
48 Duration find_nearest_duration (Rational length);
51 TRANSLATOR_DECLARATIONS(Completion_heads_engraver);
54 virtual void initialize ();
55 virtual void start_translation_timestep ();
56 virtual bool try_music (Music *req_l) ;
57 virtual void process_music ();
58 virtual void stop_translation_timestep ();
62 Completion_heads_engraver::initialize ()
68 Completion_heads_engraver::try_music (Music *m)
70 if (Note_req * n =dynamic_cast <Note_req *> (m))
72 note_req_l_arr_.push (n);
75 Moment musiclen = m->length_mom ();
76 Moment now = now_mom();
78 if (now_mom ().grace_part_)
80 musiclen.grace_part_ = musiclen.main_part_ ;
81 musiclen.main_part_ = Rational (0,1);
83 note_end_mom_ = note_end_mom_ >? (now + musiclen);
86 else if (dynamic_cast<Busy_playing_req*> (m))
88 return note_req_l_arr_.size ();
96 Completion_heads_engraver::next_barline_moment ( )
98 Moment *e = unsmob_moment (get_property ("measurePosition"));
99 Moment *l = unsmob_moment (get_property ("measureLength"));
102 programming_error ("No timing props set?");
110 Completion_heads_engraver::find_nearest_duration (Rational length)
117 this could surely be done more efficient. Left to the reader as an
119 while (d.length_mom () > length && d.duration_log () < log_limit)
123 d = Duration (d.duration_log (), d.dot_count ()- 1);
128 d = Duration (d.duration_log () + 1, 2);
132 if (d.duration_log () >= log_limit)
135 d = Duration (d.duration_log (), 0);
138 d = d.compressed (length / d.length_mom ());
145 Completion_heads_engraver::process_music ()
147 if (!first_b_ && !left_to_do_)
156 note_dur = find_nearest_duration (left_to_do_);
160 orig = unsmob_duration (note_req_l_arr_[0]->get_mus_property ("duration"));
164 Moment nb = next_barline_moment ();
165 if (nb < note_dur.length_mom ())
167 note_dur = find_nearest_duration (nb.main_part_);
169 Moment next = now_mom();
170 next.main_part_ += note_dur.length_mom ();
171 top_engraver ()->add_moment_to_process (next);
176 left_to_do_ = orig->length_mom ();
179 if (orig && note_dur.length_mom() != orig->length_mom())
181 if (!scratch_note_reqs_.size ())
182 for (int i = 0; i < note_req_l_arr_.size (); i++)
184 Music * m = note_req_l_arr_[i]->clone ();
185 scratch_note_reqs_.push (m);
188 for (int i =0; i < scratch_note_reqs_.size (); i++)
189 scratch_note_reqs_[i]->set_mus_property ("duration", note_dur.smobbed_copy ());
194 left_to_do_ && i < note_req_l_arr_.size (); i++)
196 Item *note_p = new Item (get_property ("NoteHead"));
198 Staff_symbol_referencer::set_interface (note_p);
200 Music * req = note_req_l_arr_[i];
201 if (scratch_note_reqs_.size())
203 req = scratch_note_reqs_[i];
204 SCM pits = note_req_l_arr_[i]->get_mus_property ("pitch");
205 req->set_mus_property ("pitch",pits);
208 note_p->set_grob_property ("duration-log",
209 gh_int2scm (note_dur.duration_log ()));
211 int dots= note_dur.dot_count ();
214 Item * d = new Item (get_property ("Dots"));
215 Rhythmic_head::set_dots (note_p, d);
218 measly attempt to save an eeny-weenie bit of memory.
220 if (dots != gh_scm2int (d->get_grob_property ("dot-count")))
221 d->set_grob_property ("dot-count", gh_int2scm (dots));
223 d->set_parent (note_p, Y_AXIS);
224 announce_grob (d, SCM_EOL);
228 Pitch *pit =unsmob_pitch (req->get_mus_property ("pitch"));
230 int pos = pit->steps ();
231 SCM c0 = get_property ("centralCPosition");
232 if (gh_number_p (c0))
233 pos += gh_scm2int (c0);
235 note_p->set_grob_property ("staff-position", gh_int2scm (pos));
236 if (to_boolean (get_property ("easyPlay")))
239 s[0] = (pit->notename_i_ + 2)%7 + 'a';
241 s[0] = toupper (s[0]);
242 note_p->set_grob_property ("note-character", ly_str02scm (s));
245 announce_grob (note_p,req->self_scm ());
246 note_p_arr_.push (note_p);
249 left_to_do_ -= note_dur.length_mom ();
253 don't do complicated arithmetic with grace notes.
256 && now_mom().grace_part_ )
258 left_to_do_ = Rational (0,0);
264 Completion_heads_engraver::stop_translation_timestep ()
266 for (int i=0; i < note_p_arr_.size (); i++)
268 typeset_grob (note_p_arr_[i]);
270 note_p_arr_.clear ();
272 for (int i=0; i < dot_p_arr_.size (); i++)
274 typeset_grob (dot_p_arr_[i]);
278 for (int i = scratch_note_reqs_.size(); i--;)
280 scm_gc_unprotect_object (scratch_note_reqs_[i]->self_scm () );
283 scratch_note_reqs_.clear();
286 Tie_req * tie_req = 0;
289 Completion_heads_engraver::start_translation_timestep ()
291 Moment now = now_mom ();
292 if (note_end_mom_.main_part_ <= now.main_part_)
294 note_req_l_arr_.clear ();
300 tie_req = new Tie_req;
302 bool succ = daddy_trans_l_->try_music (tie_req);
305 programming_error ("Completion_heads_engraver: no-one to make tie.");
310 Completion_heads_engraver::Completion_heads_engraver()
314 ENTER_DESCRIPTION(Completion_heads_engraver,
315 /* descr */ "This engraver replaces
316 @code{Note_heads_engraver}. It plays some trickery to
317 break long notes and automatically tie them into the next measure.",
318 /* creats*/ "NoteHead Dots",
320 /* reads */ "easyPlay centralCPosition measurePosition measureLength",