2 plet-engraver.cc -- implement Tuplet_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "command-request.hh"
12 #include "tuplet-bracket.hh"
13 #include "note-column.hh"
14 #include "time-scaled-music.hh"
16 #include "music-list.hh"
17 #include "engraver.hh"
20 class Tuplet_engraver : public Engraver
23 TRANSLATOR_DECLARATIONS(Tuplet_engraver);
26 Link_array<Time_scaled_music> time_scaled_musics_;
27 /// when does the scaled music stop? Array order is synced with time_scaled_musics_
28 Array<Rational> stop_moments_;
29 /// when does the current spanner stop? Array order is synced with time_scaled_musics_
30 Array<Rational> span_stop_moments_;
32 /// The spanners. Array order is synced with time_scaled_musics_
33 Link_array<Spanner> started_spanners_;
35 virtual void finalize ();
36 virtual void acknowledge_grob (Grob_info);
37 virtual bool try_music (Music*r);
38 virtual void start_translation_timestep ();
39 virtual void process_acknowledged_grobs ();
43 Tuplet_engraver::try_music (Music *r)
46 if (Time_scaled_music * c = dynamic_cast<Time_scaled_music *> (r))
48 Music *el = c->element ();
50 if (r->is_mus_type ("time-scaled-music"))
52 Music *el = unsmob_music (c->get_mus_property ("element"));
54 if (!dynamic_cast<Request_chord*> (el))
56 time_scaled_musics_.push (c);
57 Rational m = now_mom ().main_part_ + c->length_mom ().main_part_;
58 stop_moments_.push (m);
60 SCM s = get_property ("tupletSpannerDuration");
61 if (unsmob_moment (s))
62 m = m <? (now_mom () + *unsmob_moment (s)).main_part_;
64 span_stop_moments_.push (m);
72 Tuplet_engraver::process_acknowledged_grobs ()
74 SCM v = get_property ("tupletInvisible");
78 for (int i= 0; i < time_scaled_musics_.size (); i++)
80 if (i < started_spanners_.size () && started_spanners_[i])
83 Spanner* glep = new Spanner (get_property ("TupletBracket"));
85 if (i >= started_spanners_.size ())
86 started_spanners_.push (glep);
88 started_spanners_[i] = glep;
91 SCM proc = get_property ("tupletNumberFormatFunction");
92 if (gh_procedure_p (proc))
94 SCM t = gh_apply (proc, scm_list_n (time_scaled_musics_[i]->self_scm (), SCM_UNDEFINED));
95 glep->set_grob_property ("text", t);
98 announce_grob(glep, time_scaled_musics_ [i]->self_scm());
103 Tuplet_engraver::acknowledge_grob (Grob_info i)
105 if (Note_column::has_interface (i.grob_))
107 for (int j =0; j <started_spanners_.size (); j++)
108 if (started_spanners_[j])
109 Tuplet_bracket::add_column (started_spanners_[j], dynamic_cast<Item*> (i.grob_));
114 Tuplet_engraver::start_translation_timestep ()
116 Moment now = now_mom ();
119 SCM s = get_property ("tupletSpannerDuration");
120 if (unsmob_moment (s))
121 tsd = unsmob_moment (s)->main_part_;
123 for (int i= started_spanners_.size (); i--;)
125 if (now.main_part_ >= span_stop_moments_[i])
127 if (started_spanners_[i])
129 typeset_grob (started_spanners_[i]);
130 started_spanners_[i] =0;
134 span_stop_moments_[i] += tsd.main_part_;
137 if (now.main_part_ >= stop_moments_[i])
139 started_spanners_.del (i);
140 stop_moments_.del (i);
141 span_stop_moments_.del (i);
142 time_scaled_musics_.del (i);
148 Tuplet_engraver::finalize ()
150 for (int i=0; i < started_spanners_.size (); i++)
152 if (started_spanners_[i])
153 typeset_grob (started_spanners_[i]);
159 Tuplet_engraver::Tuplet_engraver(){}
161 ENTER_DESCRIPTION(Tuplet_engraver,
162 /* descr */ "Catch Time_scaled_music and generate appropriate bracket ",
163 /* creats*/ "TupletBracket",
164 /* accepts */ "time-scaled-music",
165 /* acks */ "note-column-interface",
166 /* reads */ "tupletNumberFormatFunction tupletSpannerDuration tupletInvisible",