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--2004 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_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   for (int i= 0; i < time_scaled_musics_.size (); i++)
  69     {
  70       if (i < started_spanners_.size () && started_spanners_[i])
  71         continue;
  72
  73       Spanner* glep = make_spanner ("TupletBracket");
  74
  75       if (i >= started_spanners_.size ())
  76         started_spanners_.push (glep);
  77       else
  78         started_spanners_[i] = glep;
  79
  80
  81       SCM proc = get_property ("tupletNumberFormatFunction");
  82       if (gh_procedure_p (proc))
  83         {
  84           SCM t = gh_apply (proc, scm_list_n (time_scaled_musics_[i]->self_scm (), SCM_UNDEFINED));
  85           glep->set_property ("text", t);
  86         }
  87
  88       announce_grob (glep, time_scaled_musics_ [i]->self_scm ());
  89     }
  90 }
  91
  92 void
  93 Tuplet_engraver::acknowledge_grob (Grob_info i)
  94 {
  95   if (Note_column::has_interface (i.grob_))
  96     {
  97       for (int j =0; j  <started_spanners_.size (); j++)
  98         if (started_spanners_[j])
  99           Tuplet_bracket::add_column (started_spanners_[j], dynamic_cast<Item*> (i.grob_));
 100     }
 101 }
 102
 103 void
 104 Tuplet_engraver::start_translation_timestep ()
 105 {
 106   Moment now = now_mom ();
 107
 108   Moment tsd;
 109   SCM s = get_property ("tupletSpannerDuration");
 110   if (unsmob_moment (s))
 111     tsd = unsmob_moment (s)->main_part_;
 112
 113   for (int i= started_spanners_.size (); i--;)
 114     {
 115       if (now.main_part_ >= span_stop_moments_[i])
 116         {
 117           if (Spanner *sp = started_spanners_[i])
 118             {
 119               if (!sp->get_bound (RIGHT))
 120                 sp->set_bound (RIGHT, sp->get_bound (LEFT));
 121
 122               typeset_grob (sp);
 123
 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",
 161 /* write */       "");