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", rest_ev_->self_scm ());
86 = make_spanner ("MultiMeasureRestNumber", rest_ev_->self_scm () );
89 if (text_events_.size ())
91 for (int i = 0; i < text_events_.size (); i++)
94 Music* e = text_events_[i];
96 = make_spanner ("MultiMeasureRestText", e->self_scm () );
97 SCM t = e->get_property ("text");
98 SCM dir = e->get_property ("direction");
99 sp->set_property ("text",t);
100 if (is_direction (dir))
101 sp->set_property ("direction",dir);
107 Stack different scripts.
112 for (int i=0; i <numbers_.size (); i++)
114 if (scm_int2num (d) == numbers_[i]->get_property ("direction"))
117 Side_position_interface::add_support (numbers_[i], last);
121 } while (flip (&d) != DOWN);
124 for (int i =0 ; i < numbers_.size (); i++)
126 Side_position_interface::add_support (numbers_[i], mmrest_);
127 numbers_[i]->set_parent (mmrest_, Y_AXIS);
131 = scm_to_int (get_property ("currentBarNumber"));
134 bar_seen_ = scm_is_string (get_property ("whichBar"));
138 Multi_measure_rest_engraver::stop_translation_timestep ()
141 We can not do this earlier, as breakableSeparationItem is not yet there.
146 Grob *cmc = unsmob_grob (get_property ("breakableSeparationItem"));
148 cmc = unsmob_grob (get_property ("currentCommandColumn"));
151 Ugh, this is a kludge - need this for multi-measure-rest-grace.ly
153 last_command_item_ = dynamic_cast<Item*> (cmc);
156 if (last_command_item_ && (mmrest_ || last_rest_))
161 add_bound_item (last_rest_, last_command_item_);
162 for (int i = 0; i < last_numbers_.size (); i++)
163 add_bound_item (last_numbers_[i], last_command_item_);
168 add_bound_item (mmrest_, last_command_item_);
169 for (int i = 0; i < numbers_.size (); i++)
170 add_bound_item (numbers_[i], last_command_item_);
172 last_command_item_ = 0;
177 SCM smp = get_property ("measurePosition");
178 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
183 last_numbers_.clear ();
186 text_events_.clear ();
190 Multi_measure_rest_engraver::start_translation_timestep ()
192 if (now_mom ().main_part_ >= stop_moment_.main_part_)
199 SCM smp = get_property ("measurePosition");
200 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
202 Moment now =now_mom ();
204 && now.main_part_ != last_main_moment_
205 && mp.main_part_ == Rational (0))
207 last_rest_ = mmrest_;
208 last_numbers_ = numbers_;
210 int cur = scm_to_int (get_property ("currentBarNumber"));
211 int num = cur - start_measure_;
214 We can't plug a markup directly into the grob, since the
215 measure-count determines the formatting of the mmrest.
217 last_rest_->set_property ("measure-count", scm_int2num (num));
219 SCM sml = get_property ("measureLength");
220 Rational ml = (unsmob_moment (sml)) ? unsmob_moment (sml)->main_part_ : Rational (1);
221 if (ml >= Rational (2))
223 last_rest_->set_property ("use-breve-rest", SCM_BOOL_T);
229 Grob * last = last_numbers_.size () ? last_numbers_[0] : 0;
230 if (last && last->get_property ("text") == SCM_EOL)
232 SCM thres = get_property ("restNumberThreshold");
234 if (scm_is_number (thres))
235 t = scm_to_int (thres);
242 = scm_number_to_string (scm_int2num (num), scm_from_int (10));
243 last->set_property ("text", text);
248 last_main_moment_ = now.main_part_;
252 Multi_measure_rest_engraver::finalize ()
256 ENTER_DESCRIPTION (Multi_measure_rest_engraver,
258 "Engraves multi-measure rests that are produced with @code{R}. Reads "
259 "measurePosition and currentBarNumber to determine what number to print "
260 "over the MultiMeasureRest. Reads measureLength to determine if it "
261 "should use a whole rest or a breve rest to represent 1 measure "
263 /* creats*/ "MultiMeasureRest MultiMeasureRestNumber MultiMeasureRestText",
264 /* accepts */ "multi-measure-rest-event multi-measure-text-event",
266 /* reads */ "currentBarNumber restNumberThreshold breakableSeparationItem currentCommandColumn measurePosition measureLength",