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_;
44 Link_array<Spanner> numbers_;
46 Link_array<Spanner> last_numbers_;
50 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
55 new_req_ = busy_span_req_ = stop_req_ =0;
59 Multi_measure_rest_engraver::try_music (Music* req)
61 if (req->is_mus_type ("multi-measure-rest-event"))
63 Direction d = to_dir (req->get_mus_property ("span-direction"));
68 else if (d == START&& !new_req_)
74 else if (req->is_mus_type ("multi-measure-text-event"))
76 text_events_.push (req);
83 Multi_measure_rest_engraver::process_music ()
85 if (new_req_ && stop_req_)
89 start_moment_ = now_mom ();
99 busy_span_req_ = new_req_;
103 if (busy_span_req_ && !mmrest_)
105 mmrest_ = new Spanner (get_property ("MultiMeasureRest"));
107 if (text_events_.size())
109 for (int i = 0; i < text_events_.size(); i++)
112 = new Spanner (get_property ("MultiMeasureRestText"));
114 Music* e = text_events_[i];
115 SCM t = e->get_mus_property ("text");
116 SCM dir = e->get_mus_property ("direction");
117 sp->set_grob_property ("text",t);
119 sp->set_grob_property ("direction",dir);
122 announce_grob (sp, e->self_scm());
126 Stack different scripts.
131 for (int i=0; i <numbers_.size(); i++)
133 if (gh_int2scm (d) == numbers_[i]->get_grob_property ("direction"))
136 Side_position_interface::add_support (numbers_[i], last);
140 } while (flip (&d) != DOWN);
145 = new Spanner (get_property ("MultiMeasureRestNumber"));
147 announce_grob (sp, busy_span_req_->self_scm());
150 for (int i =0 ; i < numbers_.size(); i++)
152 Side_position_interface::add_support (numbers_[i], mmrest_);
153 numbers_[i]->set_parent (mmrest_, Y_AXIS);
156 announce_grob (mmrest_, busy_span_req_->self_scm());
158 = gh_scm2int (get_property ("currentBarNumber"));
161 if (gh_string_p (get_property ("whichBar")))
163 Grob *cmc = unsmob_grob (get_property( "currentCommandColumn"));
164 Item *it = dynamic_cast<Item*> (cmc);
167 add_bound_item (mmrest_, it);
168 for (int i = 0; i < numbers_.size(); i++)
169 add_bound_item (numbers_[i], it);
174 add_bound_item (last_rest_,it);
175 for (int i = 0; i < last_numbers_.size(); i++)
176 add_bound_item (last_numbers_[i], it);
182 Multi_measure_rest_engraver::stop_translation_timestep ()
184 SCM smp = get_property ("measurePosition");
185 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
187 if (mmrest_ && (now_mom () >= start_moment_)
189 && mmrest_->get_bound (LEFT) && mmrest_->get_bound (RIGHT))
191 typeset_grob (mmrest_);
192 for (int i = 0 ; i < numbers_.size(); i++)
194 typeset_grob (numbers_[i]);
195 Side_position_interface::add_staff_support (numbers_[i]);
199 we must keep mmrest_ around to set measure-count, so
207 if (last_rest_->get_bound (LEFT) && last_rest_->get_bound (RIGHT)
208 && last_rest_->get_bound (LEFT) != last_rest_->get_bound (RIGHT))
210 typeset_grob (last_rest_);
212 for (int i = 0; i < last_numbers_.size ();i++)
214 typeset_grob (last_numbers_[i]);
215 Side_position_interface::add_staff_support (last_numbers_[i]);
219 last_numbers_.clear();
224 busy_span_req_ = new_req_;
228 text_events_.clear ();
232 Multi_measure_rest_engraver::start_translation_timestep ()
234 SCM smp = get_property ("measurePosition");
235 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
237 Moment now =now_mom ();
239 && now.main_part_ != last_main_moment_
240 && mp.main_part_ == Rational (0))
242 last_rest_ = mmrest_;
243 last_numbers_ = numbers_;
245 int cur = gh_scm2int (get_property ("currentBarNumber"));
246 int num = cur - start_measure_;
247 last_rest_->set_grob_property ("measure-count", gh_int2scm (num));
249 SCM sml = get_property ("measureLength");
250 Rational ml = (unsmob_moment (sml)) ? unsmob_moment (sml)->main_part_ : Rational (1);
251 if (ml >= Rational (2))
253 last_rest_->set_grob_property ("use-breve-rest", SCM_BOOL_T);
259 Grob * last = last_numbers_.size() ? last_numbers_[0] : 0;
260 if (last && last->get_grob_property ("text") == SCM_EOL)
262 SCM thres = get_property ("restNumberThreshold");
264 if (gh_number_p (thres))
265 t = gh_scm2int (thres);
272 = scm_number_to_string (gh_int2scm (num), SCM_MAKINUM (10));
273 last->set_grob_property ("text", text);
278 last_main_moment_ = now.main_part_;
282 Multi_measure_rest_engraver::finalize ()
286 typeset_grob (mmrest_);
290 typeset_grob (last_rest_);
293 for (int i = 0; i < last_numbers_.size ();i++)
294 typeset_grob (last_numbers_[i]);
296 for (int i = 0; i < numbers_.size ();i++)
297 typeset_grob (numbers_[i]);
301 ENTER_DESCRIPTION(Multi_measure_rest_engraver,
303 "Engraves multi-measure rests that are produced with @code{R}. Reads "
304 "measurePosition and currentBarNumber to determine what number to print "
305 "over the MultiMeasureRest. Reads measureLength to determine if it "
306 "should use a whole rest or a breve rest to represent 1 measure "
308 /* creats*/ "MultiMeasureRest MultiMeasureRestNumber MultiMeasureRestText",
309 /* accepts */ "multi-measure-rest-event multi-measure-text-event",
311 /* reads */ "currentBarNumber restNumberThreshold currentCommandColumn measurePosition measureLength",