2 multi_measure_rest-engraver.cc -- implement Multi_measure_rest_engraver
4 (c) 1998--2004 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 Link_array<Music> text_events_;
38 Rational last_main_moment_;
46 Link_array<Spanner> numbers_;
47 Link_array<Spanner> last_numbers_;
50 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
60 Multi_measure_rest_engraver::try_music (Music* req)
62 if (req->is_mus_type ("multi-measure-rest-event"))
65 stop_moment_ = now_mom () + rest_ev_->get_length ();
69 else if (req->is_mus_type ("multi-measure-text-event"))
71 text_events_.push (req);
78 Multi_measure_rest_engraver::process_music ()
80 if (rest_ev_ && !mmrest_
81 && stop_moment_ > now_mom ())
83 mmrest_ = make_spanner ("MultiMeasureRest");
85 if (text_events_.size())
87 for (int i = 0; i < text_events_.size(); i++)
90 = make_spanner ("MultiMeasureRestText");
92 Music* e = text_events_[i];
93 SCM t = e->get_mus_property ("text");
94 SCM dir = e->get_mus_property ("direction");
95 sp->set_grob_property ("text",t);
96 if (is_direction (dir))
97 sp->set_grob_property ("direction",dir);
100 announce_grob (sp, e->self_scm());
104 Stack different scripts.
109 for (int i=0; i <numbers_.size(); i++)
111 if (gh_int2scm (d) == numbers_[i]->get_grob_property ("direction"))
114 Side_position_interface::add_support (numbers_[i], last);
118 } while (flip (&d) != DOWN);
123 = make_spanner ("MultiMeasureRestNumber");
125 announce_grob (sp, rest_ev_->self_scm());
128 for (int i =0 ; i < numbers_.size(); i++)
130 Side_position_interface::add_support (numbers_[i], mmrest_);
131 numbers_[i]->set_parent (mmrest_, Y_AXIS);
134 announce_grob (mmrest_, rest_ev_->self_scm());
136 = gh_scm2int (get_property ("currentBarNumber"));
139 bar_seen_ = gh_string_p (get_property ("whichBar"));
143 Multi_measure_rest_engraver::stop_translation_timestep ()
146 We can not do this earlier, as breakableSeparationItem is not yet there.
151 Grob *cmc = unsmob_grob (get_property("breakableSeparationItem"));
153 cmc = unsmob_grob (get_property ("currentCommandColumn"));
155 Item *it = dynamic_cast<Item*> (cmc);
159 add_bound_item (mmrest_, it);
160 for (int i = 0; i < numbers_.size(); i++)
161 add_bound_item (numbers_[i], it);
166 add_bound_item (last_rest_,it);
167 for (int i = 0; i < last_numbers_.size(); i++)
168 add_bound_item (last_numbers_[i], it);
172 SCM smp = get_property ("measurePosition");
173 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
177 && mmrest_->get_bound (LEFT) && mmrest_->get_bound (RIGHT))
179 typeset_grob (mmrest_);
180 for (int i = 0 ; i < numbers_.size(); i++)
182 typeset_grob (numbers_[i]);
186 we must keep mmrest_ around to set measure-count, so
194 if (last_rest_->get_bound (LEFT) && last_rest_->get_bound (RIGHT)
195 && last_rest_->get_bound (LEFT) != last_rest_->get_bound (RIGHT))
197 typeset_grob (last_rest_);
199 for (int i = 0; i < last_numbers_.size ();i++)
201 typeset_grob (last_numbers_[i]);
205 last_numbers_.clear();
208 text_events_.clear ();
212 Multi_measure_rest_engraver::start_translation_timestep ()
214 if (now_mom ().main_part_ >= stop_moment_.main_part_)
221 SCM smp = get_property ("measurePosition");
222 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
224 Moment now =now_mom ();
226 && now.main_part_ != last_main_moment_
227 && mp.main_part_ == Rational (0))
229 last_rest_ = mmrest_;
230 last_numbers_ = numbers_;
232 int cur = gh_scm2int (get_property ("currentBarNumber"));
233 int num = cur - start_measure_;
234 last_rest_->set_grob_property ("measure-count", gh_int2scm (num));
236 SCM sml = get_property ("measureLength");
237 Rational ml = (unsmob_moment (sml)) ? unsmob_moment (sml)->main_part_ : Rational (1);
238 if (ml >= Rational (2))
240 last_rest_->set_grob_property ("use-breve-rest", SCM_BOOL_T);
246 Grob * last = last_numbers_.size() ? last_numbers_[0] : 0;
247 if (last && last->get_grob_property ("text") == SCM_EOL)
249 SCM thres = get_property ("restNumberThreshold");
251 if (gh_number_p (thres))
252 t = gh_scm2int (thres);
259 = scm_number_to_string (gh_int2scm (num), SCM_MAKINUM (10));
260 last->set_grob_property ("text", text);
265 last_main_moment_ = now.main_part_;
269 Multi_measure_rest_engraver::finalize ()
273 typeset_grob (mmrest_);
277 typeset_grob (last_rest_);
280 for (int i = 0; i < last_numbers_.size ();i++)
281 typeset_grob (last_numbers_[i]);
283 for (int i = 0; i < numbers_.size ();i++)
284 typeset_grob (numbers_[i]);
288 ENTER_DESCRIPTION(Multi_measure_rest_engraver,
290 "Engraves multi-measure rests that are produced with @code{R}. Reads "
291 "measurePosition and currentBarNumber to determine what number to print "
292 "over the MultiMeasureRest. Reads measureLength to determine if it "
293 "should use a whole rest or a breve rest to represent 1 measure "
295 /* creats*/ "MultiMeasureRest MultiMeasureRestNumber MultiMeasureRestText",
296 /* accepts */ "multi-measure-rest-event multi-measure-text-event",
298 /* reads */ "currentBarNumber restNumberThreshold breakableSeparationItem currentCommandColumn measurePosition measureLength",