2 plet-engraver.cc -- implement Tuplet_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
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<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 *c)
45 if (c->is_mus_type ("time-scaled-music"))
47 Music *el = unsmob_music (c->get_property ("element"));
48 if (el && !el->is_mus_type ("event-chord"))
50 time_scaled_musics_.push (c);
51 Rational m = now_mom ().main_part_ + c->get_length ().main_part_;
52 stop_moments_.push (m);
54 SCM s = get_property ("tupletSpannerDuration");
55 if (unsmob_moment (s))
56 m = m <? (now_mom () + *unsmob_moment (s)).main_part_;
58 span_stop_moments_.push (m);
66 Tuplet_engraver::process_acknowledged_grobs ()
68 for (int i= 0; i < time_scaled_musics_.size (); i++)
70 if (i < started_spanners_.size () && started_spanners_[i])
73 Spanner* glep = make_spanner ("TupletBracket", time_scaled_musics_ [i]->self_scm ());
75 if (i >= started_spanners_.size ())
76 started_spanners_.push (glep);
78 started_spanners_[i] = glep;
81 SCM proc = get_property ("tupletNumberFormatFunction");
82 if (ly_c_procedure_p (proc))
84 SCM t = scm_apply_0 (proc, scm_list_n (time_scaled_musics_[i]->self_scm (), SCM_UNDEFINED));
85 glep->set_property ("text", t);
92 Tuplet_engraver::acknowledge_grob (Grob_info i)
94 if (Note_column::has_interface (i.grob_))
96 for (int j =0; j <started_spanners_.size (); j++)
97 if (started_spanners_[j])
98 Tuplet_bracket::add_column (started_spanners_[j], dynamic_cast<Item*> (i.grob_));
103 Tuplet_engraver::start_translation_timestep ()
105 Moment now = now_mom ();
108 SCM s = get_property ("tupletSpannerDuration");
109 if (unsmob_moment (s))
110 tsd = unsmob_moment (s)->main_part_;
112 for (int i= started_spanners_.size (); i--;)
114 if (now.main_part_ >= span_stop_moments_[i])
116 if (Spanner *sp = started_spanners_[i])
118 if (!sp->get_bound (RIGHT))
119 sp->set_bound (RIGHT, sp->get_bound (LEFT));
123 started_spanners_[i] =0;
127 span_stop_moments_[i] += tsd.main_part_;
130 if (now.main_part_ >= stop_moments_[i])
132 started_spanners_.del (i);
133 stop_moments_.del (i);
134 span_stop_moments_.del (i);
135 time_scaled_musics_.del (i);
141 Tuplet_engraver::finalize ()
143 for (int i=0; i < started_spanners_.size (); i++)
145 if (started_spanners_[i])
146 typeset_grob (started_spanners_[i]);
152 Tuplet_engraver::Tuplet_engraver (){}
154 ENTER_DESCRIPTION (Tuplet_engraver,
155 /* descr */ "Catch Time_scaled_music and generate appropriate bracket ",
156 /* creats*/ "TupletBracket",
157 /* accepts */ "time-scaled-music",
158 /* acks */ "note-column-interface",
159 /* reads */ "tupletNumberFormatFunction tupletSpannerDuration",