lily/tuplet-engraver.cc

   1 /*
   2   plet-engraver.cc --  implement Tuplet_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10
  11
  12 #include "tuplet-bracket.hh"
  13 #include "note-column.hh"
  14 #include "time-scaled-music.hh"
  15 #include "beam.hh"
  16 #include "music-list.hh"
  17 #include "engraver.hh"
  18 #include "spanner.hh"
  19
  20 class Tuplet_engraver : public Engraver
  21 {
  22 public:
  23   TRANSLATOR_DECLARATIONS(Tuplet_engraver);
  24
  25 protected:
  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_;
  31
  32   /// The spanners. Array order is synced with time_scaled_musics_
  33   Link_array<Spanner> started_spanners_;
  34
  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 ();
  40 };
  41
  42 bool
  43 Tuplet_engraver::try_music (Music *c)
  44 {
  45   if (c->is_mus_type ("time-scaled-music"))
  46     {
  47       Music *el = unsmob_music (c->get_mus_property ("element"));
  48       if (el && !el->is_mus_type ("event-chord"))
  49         {
  50           time_scaled_musics_.push (c);
  51           Rational m = now_mom ().main_part_ + c->get_length ().main_part_;
  52           stop_moments_.push (m);
  53
  54           SCM s = get_property ("tupletSpannerDuration");
  55           if (unsmob_moment (s))
  56             m = m <? (now_mom () + *unsmob_moment (s)).main_part_;
  57
  58           span_stop_moments_.push (m);
  59         }
  60       return true;
  61     }
  62   return false;
  63 }
  64
  65 void
  66 Tuplet_engraver::process_acknowledged_grobs ()
  67 {
  68   SCM v = get_property ("tupletInvisible");
  69   if (to_boolean (v))
  70     return;
  71
  72   for (int i= 0; i < time_scaled_musics_.size (); i++)
  73     {
  74       if (i < started_spanners_.size () && started_spanners_[i])
  75         continue;
  76
  77       Spanner* glep = new Spanner (get_property ("TupletBracket"));
  78
  79       if (i >= started_spanners_.size ())
  80         started_spanners_.push (glep);
  81       else
  82         started_spanners_[i] = glep;
  83
  84
  85       SCM proc = get_property ("tupletNumberFormatFunction");
  86       if (gh_procedure_p (proc))
  87         {
  88           SCM t = gh_apply (proc, scm_list_n (time_scaled_musics_[i]->self_scm (), SCM_UNDEFINED));
  89           glep->set_grob_property ("text", t);
  90         }
  91
  92       announce_grob(glep, time_scaled_musics_ [i]->self_scm());
  93     }
  94 }
  95
  96 void
  97 Tuplet_engraver::acknowledge_grob (Grob_info i)
  98 {
  99   if (Note_column::has_interface (i.grob_))
 100     {
 101       for (int j =0; j  <started_spanners_.size (); j++)
 102         if (started_spanners_[j])
 103           Tuplet_bracket::add_column (started_spanners_[j], dynamic_cast<Item*> (i.grob_));
 104     }
 105 }
 106
 107 void
 108 Tuplet_engraver::start_translation_timestep ()
 109 {
 110   Moment now = now_mom ();
 111
 112   Moment tsd;
 113   SCM s = get_property ("tupletSpannerDuration");
 114   if (unsmob_moment (s))
 115     tsd = unsmob_moment (s)->main_part_;
 116
 117   for (int i= started_spanners_.size (); i--;)
 118     {
 119       if (now.main_part_ >= span_stop_moments_[i])
 120         {
 121           if (started_spanners_[i])
 122             {
 123               typeset_grob (started_spanners_[i]);
 124               started_spanners_[i] =0;
 125             }
 126
 127           if (tsd.to_bool ())
 128             span_stop_moments_[i] += tsd.main_part_;
 129         }
 130
 131       if (now.main_part_ >= stop_moments_[i])
 132         {
 133           started_spanners_.del (i);
 134           stop_moments_.del (i);
 135           span_stop_moments_.del (i);
 136           time_scaled_musics_.del (i);
 137         }
 138     }
 139 }
 140
 141 void
 142 Tuplet_engraver::finalize ()
 143 {
 144   for (int i=0; i < started_spanners_.size (); i++)
 145     {
 146       if (started_spanners_[i])
 147         typeset_grob (started_spanners_[i]);
 148     }
 149 }
 150
 151
 152
 153 Tuplet_engraver::Tuplet_engraver(){}
 154
 155 ENTER_DESCRIPTION(Tuplet_engraver,
 156 /* descr */       "Catch Time_scaled_music and generate appropriate bracket  ",
 157 /* creats*/       "TupletBracket",
 158 /* accepts */     "time-scaled-music",
 159 /* acks  */      "note-column-interface",
 160 /* reads */       "tupletNumberFormatFunction tupletSpannerDuration tupletInvisible",
 161 /* write */       "");