2 multi_measure_rest-engraver.cc -- implement Multi_measure_rest_engraver
4 (c) 1998--2003 Jan Nieuwenhuizen <janneke@gnu.org>
5 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "multi-measure-rest.hh"
10 #include "paper-column.hh"
11 #include "engraver-group-engraver.hh"
12 #include "side-position-interface.hh"
13 #include "staff-symbol-referencer.hh"
14 #include "engraver.hh"
19 The name says it all: make multi measure rests
22 class Multi_measure_rest_engraver : public Engraver
25 TRANSLATOR_DECLARATIONS(Multi_measure_rest_engraver);
28 virtual bool try_music (Music*);
29 virtual void process_music ();
30 virtual void stop_translation_timestep ();
31 virtual void start_translation_timestep ();
32 virtual void finalize ();
36 Music * busy_span_req_;
38 Link_array<Music> text_events_;
41 Rational last_main_moment_;
46 Link_array<Spanner> numbers_;
48 Link_array<Spanner> last_numbers_;
52 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
58 new_req_ = busy_span_req_ = stop_req_ =0;
62 Multi_measure_rest_engraver::try_music (Music* req)
64 if (req->is_mus_type ("multi-measure-rest-event"))
66 Direction d = to_dir (req->get_mus_property ("span-direction"));
71 else if (d == START&& !new_req_)
77 else if (req->is_mus_type ("multi-measure-text-event"))
79 text_events_.push (req);
86 Multi_measure_rest_engraver::process_music ()
89 if (new_req_ && stop_req_)
93 start_moment_ = now_mom ();
103 busy_span_req_ = new_req_;
107 if (busy_span_req_ && !mmrest_)
109 mmrest_ = new Spanner (get_property ("MultiMeasureRest"));
111 if (text_events_.size())
113 for (int i = 0; i < text_events_.size(); i++)
116 = new Spanner (get_property ("MultiMeasureRestText"));
118 Music* e = text_events_[i];
119 SCM t = e->get_mus_property ("text");
120 SCM dir = e->get_mus_property ("direction");
121 sp->set_grob_property ("text",t);
122 if (is_direction (dir))
123 sp->set_grob_property ("direction",dir);
126 announce_grob (sp, e->self_scm());
130 Stack different scripts.
135 for (int i=0; i <numbers_.size(); i++)
137 if (gh_int2scm (d) == numbers_[i]->get_grob_property ("direction"))
140 Side_position_interface::add_support (numbers_[i], last);
144 } while (flip (&d) != DOWN);
149 = new Spanner (get_property ("MultiMeasureRestNumber"));
151 announce_grob (sp, busy_span_req_->self_scm());
154 for (int i =0 ; i < numbers_.size(); i++)
156 Side_position_interface::add_support (numbers_[i], mmrest_);
157 numbers_[i]->set_parent (mmrest_, Y_AXIS);
160 announce_grob (mmrest_, busy_span_req_->self_scm());
162 = gh_scm2int (get_property ("currentBarNumber"));
165 bar_seen_ = gh_string_p (get_property ("whichBar"));
169 Multi_measure_rest_engraver::stop_translation_timestep ()
172 We can not do this earlier, as breakableSeparationItem is not yet there.
177 Grob *cmc = unsmob_grob (get_property("breakableSeparationItem"));
179 cmc = unsmob_grob (get_property ("currentCommandColumn"));
181 Item *it = dynamic_cast<Item*> (cmc);
185 add_bound_item (mmrest_, it);
186 for (int i = 0; i < numbers_.size(); i++)
187 add_bound_item (numbers_[i], it);
192 add_bound_item (last_rest_,it);
193 for (int i = 0; i < last_numbers_.size(); i++)
194 add_bound_item (last_numbers_[i], it);
199 SCM smp = get_property ("measurePosition");
200 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
202 if (mmrest_ && (now_mom () >= start_moment_)
204 && mmrest_->get_bound (LEFT) && mmrest_->get_bound (RIGHT))
206 typeset_grob (mmrest_);
207 for (int i = 0 ; i < numbers_.size(); i++)
209 typeset_grob (numbers_[i]);
210 Side_position_interface::add_staff_support (numbers_[i]);
214 we must keep mmrest_ around to set measure-count, so
222 if (last_rest_->get_bound (LEFT) && last_rest_->get_bound (RIGHT)
223 && last_rest_->get_bound (LEFT) != last_rest_->get_bound (RIGHT))
225 typeset_grob (last_rest_);
227 for (int i = 0; i < last_numbers_.size ();i++)
229 typeset_grob (last_numbers_[i]);
230 Side_position_interface::add_staff_support (last_numbers_[i]);
234 last_numbers_.clear();
239 busy_span_req_ = new_req_;
243 text_events_.clear ();
247 Multi_measure_rest_engraver::start_translation_timestep ()
251 SCM smp = get_property ("measurePosition");
252 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
254 Moment now =now_mom ();
256 && now.main_part_ != last_main_moment_
257 && mp.main_part_ == Rational (0))
259 last_rest_ = mmrest_;
260 last_numbers_ = numbers_;
262 int cur = gh_scm2int (get_property ("currentBarNumber"));
263 int num = cur - start_measure_;
264 last_rest_->set_grob_property ("measure-count", gh_int2scm (num));
266 SCM sml = get_property ("measureLength");
267 Rational ml = (unsmob_moment (sml)) ? unsmob_moment (sml)->main_part_ : Rational (1);
268 if (ml >= Rational (2))
270 last_rest_->set_grob_property ("use-breve-rest", SCM_BOOL_T);
276 Grob * last = last_numbers_.size() ? last_numbers_[0] : 0;
277 if (last && last->get_grob_property ("text") == SCM_EOL)
279 SCM thres = get_property ("restNumberThreshold");
281 if (gh_number_p (thres))
282 t = gh_scm2int (thres);
289 = scm_number_to_string (gh_int2scm (num), SCM_MAKINUM (10));
290 last->set_grob_property ("text", text);
295 last_main_moment_ = now.main_part_;
299 Multi_measure_rest_engraver::finalize ()
303 typeset_grob (mmrest_);
307 typeset_grob (last_rest_);
310 for (int i = 0; i < last_numbers_.size ();i++)
311 typeset_grob (last_numbers_[i]);
313 for (int i = 0; i < numbers_.size ();i++)
314 typeset_grob (numbers_[i]);
318 ENTER_DESCRIPTION(Multi_measure_rest_engraver,
320 "Engraves multi-measure rests that are produced with @code{R}. Reads "
321 "measurePosition and currentBarNumber to determine what number to print "
322 "over the MultiMeasureRest. Reads measureLength to determine if it "
323 "should use a whole rest or a breve rest to represent 1 measure "
325 /* creats*/ "MultiMeasureRest MultiMeasureRestNumber MultiMeasureRestText",
326 /* accepts */ "multi-measure-rest-event multi-measure-text-event",
328 /* reads */ "currentBarNumber restNumberThreshold breakableSeparationItem currentCommandColumn measurePosition measureLength",