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
  19 class Tuplet_engraver : public Engraver
  20 {
  21 public:
  22   VIRTUAL_COPY_CONS(Translator);
  23
  24 protected:
  25   Link_array<Time_scaled_music> time_scaled_music_arr_;
  26   /// when does the scaled music stop? Array order is synced with time_scaled_music_arr_
  27   Array<Moment> stop_moments_;
  28   /// when does the current spanner stop? Array order is synced with time_scaled_music_arr_
  29   Array<Moment> span_stop_moments_;
  30
  31   /// The spanners. Array order is synced with time_scaled_music_arr_
  32   Link_array<Tuplet_spanner> started_span_p_arr_;
  33
  34   virtual void do_removal_processing ();
  35   virtual void acknowledge_element (Score_element_info);
  36   virtual bool do_try_music (Music*r);
  37   virtual void do_process_music ();
  38   virtual void do_post_move_processing ();
  39 };
  40
  41 bool
  42 Tuplet_engraver::do_try_music (Music *r)
  43 {
  44   if (Time_scaled_music * c = dynamic_cast<Time_scaled_music *> (r))
  45     {
  46       Music *el = c->element_l ();
  47       if (!dynamic_cast<Request_chord*> (el))
  48         {
  49           time_scaled_music_arr_.push (c);
  50           Moment m = now_mom () + c->length_mom ();
  51           stop_moments_.push (m);
  52
  53           SCM s = get_property ("tupletSpannerDuration");
  54           if (unsmob_moment(s))
  55             m = m <? (now_mom () + *unsmob_moment (s));
  56
  57           span_stop_moments_.push (m);
  58         }
  59       return true;
  60     }
  61   return false;
  62 }
  63
  64 void
  65 Tuplet_engraver::do_process_music ()
  66 {
  67   SCM v = get_property ("tupletInvisible");
  68   if (to_boolean (v))
  69     return;
  70
  71   for (int i= 0; i < time_scaled_music_arr_.size (); i++)
  72     {
  73       if (i < started_span_p_arr_.size () && started_span_p_arr_[i])
  74         continue;
  75
  76       Tuplet_spanner* glep = new Tuplet_spanner (get_property ("basicTupletSpannerProperties"));
  77       if (i >= started_span_p_arr_.size ())
  78         started_span_p_arr_.push (glep);
  79       else
  80         started_span_p_arr_[i] = glep;
  81
  82       glep->set_elt_property ("text",
  83                               ly_str02scm (to_str (time_scaled_music_arr_[i]->den_i_).ch_C()));
  84
  85       announce_element (Score_element_info (glep, time_scaled_music_arr_ [i]));
  86     }
  87 }
  88
  89 void
  90 Tuplet_engraver::acknowledge_element (Score_element_info i)
  91 {
  92   bool grace= to_boolean (i.elem_l_->get_elt_property ("grace"));
  93   SCM wg = get_property ("weAreGraceContext");
  94   bool wgb = to_boolean (wg);
  95   if (grace != wgb)
  96     return;
  97
  98   if (Note_column *nc = dynamic_cast<Note_column *> (i.elem_l_))
  99     {
 100       for (int j =0; j  <started_span_p_arr_.size (); j++)
 101         if (started_span_p_arr_[j])
 102           started_span_p_arr_[j]->add_column (nc);
 103     }
 104   else if (Beam *b = dynamic_cast<Beam *> (i.elem_l_))
 105     {
 106       for (int j = 0; j < started_span_p_arr_.size (); j++)
 107         if (started_span_p_arr_[j])
 108           started_span_p_arr_[j]->add_beam (b);
 109     }
 110 }
 111
 112 void
 113 Tuplet_engraver::do_post_move_processing ()
 114 {
 115   Moment now = now_mom ();
 116
 117   Moment tsd;
 118   SCM s = get_property ("tupletSpannerDuration");
 119   if (unsmob_moment (s))
 120     tsd = *unsmob_moment (s);
 121
 122   for (int i= started_span_p_arr_.size (); i--; )
 123     {
 124       if (now >= span_stop_moments_[i])
 125         {
 126           if (started_span_p_arr_[i])
 127             {
 128               typeset_element (started_span_p_arr_[i]);
 129               started_span_p_arr_[i] =0;
 130             }
 131
 132           if (tsd)
 133             span_stop_moments_[i] += tsd;
 134         }
 135
 136       if (now >= stop_moments_[i])
 137         {
 138           started_span_p_arr_.del (i);
 139           stop_moments_.del(i);
 140           span_stop_moments_.del (i);
 141           time_scaled_music_arr_.del(i);
 142         }
 143     }
 144 }
 145
 146 void
 147 Tuplet_engraver::do_removal_processing ()
 148 {
 149   for (int i=0; i < started_span_p_arr_.size (); i++)
 150     {
 151       if (started_span_p_arr_[i])
 152         typeset_element (started_span_p_arr_[i]);
 153     }
 154 }
 155
 156 ADD_THIS_TRANSLATOR(Tuplet_engraver);
 157
 158