2 multi_measure_rest-engraver.cc -- implement Multi_measure_rest_engraver
4 (c) 1998--2005 Jan Nieuwenhuizen <janneke@gnu.org>
5 Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 #include "multi-measure-rest.hh"
9 #include "paper-column.hh"
10 #include "engraver-group-engraver.hh"
11 #include "side-position-interface.hh"
12 #include "staff-symbol-referencer.hh"
16 The name says it all: make multi measure rests
18 class Multi_measure_rest_engraver : public Engraver
21 TRANSLATOR_DECLARATIONS (Multi_measure_rest_engraver);
24 virtual bool try_music (Music *);
25 virtual void process_music ();
26 virtual void stop_translation_timestep ();
27 virtual void start_translation_timestep ();
28 virtual void finalize ();
32 Link_array<Music> text_events_;
34 Rational last_main_moment_;
38 Item *last_command_item_;
42 Link_array<Spanner> numbers_;
43 Link_array<Spanner> last_numbers_;
46 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
48 last_command_item_ = 0;
57 Multi_measure_rest_engraver::try_music (Music *req)
59 if (req->is_mus_type ("multi-measure-rest-event"))
62 stop_moment_ = now_mom () + rest_ev_->get_length ();
66 else if (req->is_mus_type ("multi-measure-text-event"))
68 text_events_.push (req);
75 Multi_measure_rest_engraver::process_music ()
77 if (rest_ev_ && !mmrest_
78 && stop_moment_ > now_mom ())
80 mmrest_ = make_spanner ("MultiMeasureRest", rest_ev_->self_scm ());
83 = make_spanner ("MultiMeasureRestNumber", rest_ev_->self_scm ());
86 if (text_events_.size ())
88 for (int i = 0; i < text_events_.size (); i++)
91 Music *e = text_events_[i];
93 = make_spanner ("MultiMeasureRestText", e->self_scm ());
94 SCM t = e->get_property ("text");
95 SCM dir = e->get_property ("direction");
96 sp->set_property ("text", t);
97 if (is_direction (dir))
98 sp->set_property ("direction", dir);
104 Stack different scripts.
110 for (int i = 0; i < numbers_.size (); i++)
112 if (scm_int2num (d) == numbers_[i]->get_property ("direction"))
115 Side_position_interface::add_support (numbers_[i], last);
120 while (flip (&d) != DOWN);
123 for (int i = 0; i < numbers_.size (); i++)
125 Side_position_interface::add_support (numbers_[i], mmrest_);
126 numbers_[i]->set_parent (mmrest_, Y_AXIS);
130 = scm_to_int (get_property ("currentBarNumber"));
133 bar_seen_ = scm_is_string (get_property ("whichBar"));
137 Multi_measure_rest_engraver::stop_translation_timestep ()
139 /* We cannot do this earlier, as breakableSeparationItem is not yet
143 Grob *cmc = unsmob_grob (get_property ("breakableSeparationItem"));
145 cmc = unsmob_grob (get_property ("currentCommandColumn"));
147 /* Ugh, this is a kludge - need this for multi-measure-rest-grace.ly */
148 last_command_item_ = dynamic_cast<Item *> (cmc);
151 if (last_command_item_ && (mmrest_ || last_rest_))
155 add_bound_item (last_rest_, last_command_item_);
156 for (int i = 0; i < last_numbers_.size (); i++)
157 add_bound_item (last_numbers_[i], last_command_item_);
162 add_bound_item (mmrest_, last_command_item_);
163 for (int i = 0; i < numbers_.size (); i++)
164 add_bound_item (numbers_[i], last_command_item_);
166 last_command_item_ = 0;
170 Moment mp (robust_scm2moment (get_property ("measurePosition"), Moment (0)));
174 last_numbers_.clear ();
177 text_events_.clear ();
181 Multi_measure_rest_engraver::start_translation_timestep ()
183 if (now_mom ().main_part_ >= stop_moment_.main_part_)
190 Moment mp (robust_scm2moment (get_property ("measurePosition"), Moment (0)));
192 Moment now = now_mom ();
194 && now.main_part_ != last_main_moment_
195 && mp.main_part_ == Rational (0))
197 last_rest_ = mmrest_;
198 last_numbers_ = numbers_;
200 int cur = scm_to_int (get_property ("currentBarNumber"));
201 int num = cur - start_measure_;
204 We can't plug a markup directly into the grob, since the
205 measure-count determines the formatting of the mmrest.
207 last_rest_->set_property ("measure-count", scm_int2num (num));
209 SCM sml = get_property ("measureLength");
210 Rational ml = (unsmob_moment (sml)) ? unsmob_moment (sml)->main_part_ : Rational (1);
211 if (ml >= Rational (2))
213 last_rest_->set_property ("use-breve-rest", SCM_BOOL_T);
219 Grob *last = last_numbers_.size () ? last_numbers_[0] : 0;
220 if (last && last->get_property ("text") == SCM_EOL)
222 SCM thres = get_property ("restNumberThreshold");
224 if (scm_is_number (thres))
225 t = scm_to_int (thres);
232 = scm_number_to_string (scm_int2num (num), scm_from_int (10));
233 last->set_property ("text", text);
238 last_main_moment_ = now.main_part_;
242 Multi_measure_rest_engraver::finalize ()
246 ADD_TRANSLATOR (Multi_measure_rest_engraver,
248 "Engraves multi-measure rests that are produced with @code{R}. Reads "
249 "measurePosition and currentBarNumber to determine what number to print "
250 "over the MultiMeasureRest. Reads measureLength to determine if it "
251 "should use a whole rest or a breve rest to represent 1 measure ",
252 /* creats*/ "MultiMeasureRest MultiMeasureRestNumber MultiMeasureRestText",
253 /* accepts */ "multi-measure-rest-event multi-measure-text-event",
255 /* reads */ "currentBarNumber restNumberThreshold breakableSeparationItem currentCommandColumn measurePosition measureLength",