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 req->set_mus_property ("pitch",
205 note_req_l_arr_[i]->get_mus_property ("pitch"));
207 note_p->set_grob_property ("duration-log",
208 gh_int2scm (note_dur.duration_log ()));
210 int dots= note_dur.dot_count ();
213 Item * d = new Item (get_property ("Dots"));
214 Rhythmic_head::set_dots (note_p, d);
217 measly attempt to save an eeny-weenie bit of memory.
219 if (dots != gh_scm2int (d->get_grob_property ("dot-count")))
220 d->set_grob_property ("dot-count", gh_int2scm (dots));
222 d->set_parent (note_p, Y_AXIS);
227 Pitch *pit =unsmob_pitch (req->get_mus_property ("pitch"));
229 int pos = pit->steps ();
230 SCM c0 = get_property ("centralCPosition");
231 if (gh_number_p (c0))
232 pos += gh_scm2int (c0);
234 note_p->set_grob_property ("staff-position", gh_int2scm (pos));
235 if (to_boolean (get_property ("easyPlay")))
238 s[0] = (pit->notename_i_ + 2)%7 + 'a';
240 s[0] = toupper (s[0]);
241 note_p->set_grob_property ("note-character", ly_str02scm (s));
244 announce_grob (note_p,req);
245 note_p_arr_.push (note_p);
248 left_to_do_ -= note_dur.length_mom ();
252 don't do complicated arithmetic with grace notes.
255 && now_mom().grace_part_ )
257 left_to_do_ = Rational (0,0);
263 Completion_heads_engraver::stop_translation_timestep ()
265 for (int i=0; i < note_p_arr_.size (); i++)
267 typeset_grob (note_p_arr_[i]);
269 note_p_arr_.clear ();
271 for (int i=0; i < dot_p_arr_.size (); i++)
273 typeset_grob (dot_p_arr_[i]);
277 for (int i = scratch_note_reqs_.size(); i--;)
279 scm_gc_unprotect_object (scratch_note_reqs_[i]->self_scm () );
282 scratch_note_reqs_.clear();
285 Tie_req * tie_req = 0;
288 Completion_heads_engraver::start_translation_timestep ()
290 Moment now = now_mom ();
291 if (note_end_mom_.main_part_ <= now.main_part_)
293 note_req_l_arr_.clear ();
299 tie_req = new Tie_req;
301 bool succ = daddy_trans_l_->try_music (tie_req);
304 programming_error ("Completion_heads_engraver: no-one to make tie.");
309 Completion_heads_engraver::Completion_heads_engraver()
313 ENTER_DESCRIPTION(Completion_heads_engraver,
314 /* descr */ "This engraver replaces
315 @code{Note_heads_engraver}. It plays some trickery to
316 break long notes and automatically tie them into the next measure.",
317 /* creats*/ "NoteHead Dots",
319 /* reads */ "easyPlay centralCPosition measurePosition measureLength",