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--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10
  11 #include "command-request.hh"
  12 #include "tuplet-spanner.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   VIRTUAL_COPY_CONS(Translator);
  24
  25 protected:
  26   Link_array<Time_scaled_music> time_scaled_music_arr_;
  27   /// when does the scaled music stop? Array order is synced with time_scaled_music_arr_
  28   Array<Moment> stop_moments_;
  29   /// when does the current spanner stop? Array order is synced with time_scaled_music_arr_
  30   Array<Moment> span_stop_moments_;
  31
  32   /// The spanners. Array order is synced with time_scaled_music_arr_
  33   Link_array<Spanner> started_span_p_arr_;
  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 create_grobs ();
  40 };
  41
  42 bool
  43 Tuplet_engraver::try_music (Music *r)
  44 {
  45   if (Time_scaled_music * c = dynamic_cast<Time_scaled_music *> (r))
  46     {
  47       Music *el = c->element ();
  48       if (!dynamic_cast<Request_chord*> (el))
  49         {
  50           time_scaled_music_arr_.push (c);
  51           Moment m = now_mom () + c->length_mom ();
  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));
  57
  58           span_stop_moments_.push (m);
  59         }
  60       return true;
  61     }
  62   return false;
  63 }
  64
  65 void
  66 Tuplet_engraver::create_grobs ()
  67 {
  68   SCM v = get_property ("tupletInvisible");
  69   if (to_boolean (v))
  70     return;
  71
  72   for (int i= 0; i < time_scaled_music_arr_.size (); i++)
  73     {
  74       if (i < started_span_p_arr_.size () && started_span_p_arr_[i])
  75         continue;
  76
  77       Spanner* glep = new Spanner (get_property ("TupletBracket"));
  78       Tuplet_spanner::set_interface (glep);
  79       if (i >= started_span_p_arr_.size ())
  80         started_span_p_arr_.push (glep);
  81       else
  82         started_span_p_arr_[i] = glep;
  83
  84
  85       int d = gh_scm2int (time_scaled_music_arr_[i]->get_mus_property ("denominator"));
  86       glep->set_grob_property ("text", ly_str02scm (to_str (d).ch_C()));
  87
  88       announce_grob (glep, time_scaled_music_arr_ [i]);
  89     }
  90 }
  91
  92 void
  93 Tuplet_engraver::acknowledge_grob (Grob_info i)
  94 {
  95   bool grace= to_boolean (i.elem_l_->get_grob_property ("grace"));
  96   SCM wg = get_property ("weAreGraceContext");
  97   bool wgb = to_boolean (wg);
  98   if (grace != wgb)
  99     return;
 100
 101   if (Note_column::has_interface(i.elem_l_))
 102     {
 103       for (int j =0; j  <started_span_p_arr_.size (); j++)
 104         if (started_span_p_arr_[j])
 105           Tuplet_spanner::add_column (started_span_p_arr_[j], dynamic_cast<Item*>(i.elem_l_));
 106     }
 107   else if (Beam::has_interface (i.elem_l_))
 108     {
 109       for (int j = 0; j < started_span_p_arr_.size (); j++)
 110         if (started_span_p_arr_[j])
 111           Tuplet_spanner::add_beam (started_span_p_arr_[j],i.elem_l_);
 112     }
 113 }
 114
 115 void
 116 Tuplet_engraver::start_translation_timestep ()
 117 {
 118   Moment now = now_mom ();
 119
 120   Moment tsd;
 121   SCM s = get_property ("tupletSpannerDuration");
 122   if (unsmob_moment (s))
 123     tsd = *unsmob_moment (s);
 124
 125   for (int i= started_span_p_arr_.size (); i--; )
 126     {
 127       if (now >= span_stop_moments_[i])
 128         {
 129           if (started_span_p_arr_[i])
 130             {
 131               typeset_grob (started_span_p_arr_[i]);
 132               started_span_p_arr_[i] =0;
 133             }
 134
 135           if (tsd)
 136             span_stop_moments_[i] += tsd;
 137         }
 138
 139       if (now >= stop_moments_[i])
 140         {
 141           started_span_p_arr_.del (i);
 142           stop_moments_.del(i);
 143           span_stop_moments_.del (i);
 144           time_scaled_music_arr_.del(i);
 145         }
 146     }
 147 }
 148
 149 void
 150 Tuplet_engraver::finalize ()
 151 {
 152   for (int i=0; i < started_span_p_arr_.size (); i++)
 153     {
 154       if (started_span_p_arr_[i])
 155         typeset_grob (started_span_p_arr_[i]);
 156     }
 157 }
 158
 159 ADD_THIS_TRANSLATOR(Tuplet_engraver);
 160
 161