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--2001 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_bracket::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       SCM proc = get_property ("tupletNumberFormatFunction");
  86       if (gh_procedure_p (proc))
  87         {
  88           SCM t = gh_apply (proc, gh_list (time_scaled_music_arr_[i]->self_scm (), SCM_UNDEFINED));
  89           glep->set_grob_property ("text", t);
  90         }
  91
  92       announce_grob (glep, time_scaled_music_arr_ [i]);
  93     }
  94 }
  95
  96 void
  97 Tuplet_engraver::acknowledge_grob (Grob_info i)
  98 {
  99   bool grace= to_boolean (i.elem_l_->get_grob_property ("grace"));
 100   SCM wg = get_property ("weAreGraceContext");
 101   bool wgb = to_boolean (wg);
 102   if (grace != wgb)
 103     return;
 104
 105   if (Note_column::has_interface (i.elem_l_))
 106     {
 107       for (int j =0; j  <started_span_p_arr_.size (); j++)
 108         if (started_span_p_arr_[j])
 109           Tuplet_bracket::add_column (started_span_p_arr_[j], dynamic_cast<Item*> (i.elem_l_));
 110     }
 111 }
 112
 113 void
 114 Tuplet_engraver::start_translation_timestep ()
 115 {
 116   Moment now = now_mom ();
 117
 118   Moment tsd;
 119   SCM s = get_property ("tupletSpannerDuration");
 120   if (unsmob_moment (s))
 121     tsd = *unsmob_moment (s);
 122
 123   for (int i= started_span_p_arr_.size (); i--;)
 124     {
 125       if (now >= span_stop_moments_[i])
 126         {
 127           if (started_span_p_arr_[i])
 128             {
 129               typeset_grob (started_span_p_arr_[i]);
 130               started_span_p_arr_[i] =0;
 131             }
 132
 133           if (tsd)
 134             span_stop_moments_[i] += tsd;
 135         }
 136
 137       if (now >= stop_moments_[i])
 138         {
 139           started_span_p_arr_.del (i);
 140           stop_moments_.del (i);
 141           span_stop_moments_.del (i);
 142           time_scaled_music_arr_.del (i);
 143         }
 144     }
 145 }
 146
 147 void
 148 Tuplet_engraver::finalize ()
 149 {
 150   for (int i=0; i < started_span_p_arr_.size (); i++)
 151     {
 152       if (started_span_p_arr_[i])
 153         typeset_grob (started_span_p_arr_[i]);
 154     }
 155 }
 156
 157 ADD_THIS_TRANSLATOR (Tuplet_engraver);
 158
 159