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
21 class Multi_measure_rest_engraver : public Engraver
24 TRANSLATOR_DECLARATIONS (Multi_measure_rest_engraver);
27 virtual bool try_music (Music*);
28 virtual void process_music ();
29 virtual void stop_translation_timestep ();
30 virtual void start_translation_timestep ();
31 virtual void finalize ();
35 Link_array<Music> text_events_;
37 Rational last_main_moment_;
41 Item *last_command_item_ ;
45 Link_array<Spanner> numbers_;
46 Link_array<Spanner> last_numbers_;
49 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
51 last_command_item_ = 0;
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_property ("text");
94 SCM dir = e->get_property ("direction");
95 sp->set_property ("text",t);
96 if (is_direction (dir))
97 sp->set_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 (scm_int2num (d) == numbers_[i]->get_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 = ly_scm2int (get_property ("currentBarNumber"));
139 bar_seen_ = ly_c_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"));
156 Ugh, this is a kludge - need this for multi-measure-rest-grace.ly
158 last_command_item_ = dynamic_cast<Item*> (cmc);
161 if (last_command_item_ && (mmrest_ || last_rest_))
166 add_bound_item (last_rest_, last_command_item_);
167 for (int i = 0; i < last_numbers_.size (); i++)
168 add_bound_item (last_numbers_[i], last_command_item_);
173 add_bound_item (mmrest_, last_command_item_);
174 for (int i = 0; i < numbers_.size (); i++)
175 add_bound_item (numbers_[i], last_command_item_);
177 last_command_item_ = 0;
182 SCM smp = get_property ("measurePosition");
183 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
187 && mmrest_->get_bound (LEFT) && mmrest_->get_bound (RIGHT))
189 typeset_grob (mmrest_);
190 for (int i = 0 ; i < numbers_.size (); i++)
192 typeset_grob (numbers_[i]);
196 we must keep mmrest_ around to set measure-count, so
204 if (last_rest_->get_bound (LEFT) && last_rest_->get_bound (RIGHT)
205 && last_rest_->get_bound (LEFT) != last_rest_->get_bound (RIGHT))
207 typeset_grob (last_rest_);
209 for (int i = 0; i < last_numbers_.size ();i++)
211 typeset_grob (last_numbers_[i]);
215 last_numbers_.clear ();
218 text_events_.clear ();
222 Multi_measure_rest_engraver::start_translation_timestep ()
224 if (now_mom ().main_part_ >= stop_moment_.main_part_)
231 SCM smp = get_property ("measurePosition");
232 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
234 Moment now =now_mom ();
236 && now.main_part_ != last_main_moment_
237 && mp.main_part_ == Rational (0))
239 last_rest_ = mmrest_;
240 last_numbers_ = numbers_;
242 int cur = ly_scm2int (get_property ("currentBarNumber"));
243 int num = cur - start_measure_;
246 We can't plug a markup directly into the grob, since the
247 measure-count determines the formatting of the mmrest.
249 last_rest_->set_property ("measure-count", scm_int2num (num));
251 SCM sml = get_property ("measureLength");
252 Rational ml = (unsmob_moment (sml)) ? unsmob_moment (sml)->main_part_ : Rational (1);
253 if (ml >= Rational (2))
255 last_rest_->set_property ("use-breve-rest", SCM_BOOL_T);
261 Grob * last = last_numbers_.size () ? last_numbers_[0] : 0;
262 if (last && last->get_property ("text") == SCM_EOL)
264 SCM thres = get_property ("restNumberThreshold");
266 if (ly_c_number_p (thres))
267 t = ly_scm2int (thres);
274 = scm_number_to_string (scm_int2num (num), SCM_MAKINUM (10));
275 last->set_property ("text", text);
280 last_main_moment_ = now.main_part_;
284 Multi_measure_rest_engraver::finalize ()
288 typeset_grob (mmrest_);
292 typeset_grob (last_rest_);
295 for (int i = 0; i < last_numbers_.size ();i++)
296 typeset_grob (last_numbers_[i]);
298 for (int i = 0; i < numbers_.size ();i++)
299 typeset_grob (numbers_[i]);
303 ENTER_DESCRIPTION (Multi_measure_rest_engraver,
305 "Engraves multi-measure rests that are produced with @code{R}. Reads "
306 "measurePosition and currentBarNumber to determine what number to print "
307 "over the MultiMeasureRest. Reads measureLength to determine if it "
308 "should use a whole rest or a breve rest to represent 1 measure "
310 /* creats*/ "MultiMeasureRest MultiMeasureRestNumber MultiMeasureRestText",
311 /* accepts */ "multi-measure-rest-event multi-measure-text-event",
313 /* reads */ "currentBarNumber restNumberThreshold breakableSeparationItem currentCommandColumn measurePosition measureLength",