lily/repeated-music.cc

   1 /*
   2   repeated-music.cc --  implement Repeated_music
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "repeated-music.hh"
  11 #include "music-list.hh"
  12 #include "pitch.hh"
  13 #include "warn.hh"
  14 #include "music-sequence.hh"
  15
  16 Music *
  17 Repeated_music::body ()const
  18 {
  19   return unsmob_music (get_mus_property ("element"));
  20 }
  21
  22 SCM
  23 Repeated_music::alternatives ()const
  24 {
  25   return get_mus_property ("elements");
  26 }
  27
  28
  29 Repeated_music::Repeated_music (SCM l)
  30   : Music (l)
  31 {
  32   set_mus_property ("type", ly_symbol2scm ("repeated-music"));
  33 }
  34
  35
  36 Pitch
  37 Repeated_music::to_relative_octave (Pitch p)
  38 {
  39   if (body ())
  40     p = body ()->to_relative_octave (p);
  41
  42   Pitch last = p ;
  43   if (alternatives ())
  44     for (SCM s = alternatives (); gh_pair_p (s);  s = ly_cdr (s))
  45       unsmob_music (ly_car (s))->to_relative_octave (p);
  46
  47
  48   return last;
  49 }
  50
  51 void
  52 Repeated_music::transpose (Pitch p)
  53 {
  54   if (body ())
  55     body ()->transpose (p);
  56
  57   Music_sequence::transpose_list (get_mus_property ("elements"), p);
  58 }
  59
  60 void
  61 Repeated_music::compress (Moment p)
  62 {
  63   if (body ())
  64     body ()->compress (p);
  65
  66   Music_sequence::compress_list (alternatives (), p);
  67 }
  68
  69 Moment
  70 Repeated_music::alternatives_length_mom (bool fold) const
  71 {
  72   if (!alternatives ())
  73     return 0;
  74
  75   if (fold)
  76     return Music_sequence::maximum_length (alternatives ());
  77
  78   Moment m =0;
  79   int done =0;
  80
  81   SCM p = alternatives ();
  82   while (gh_pair_p (p) && done < repeat_count ())
  83     {
  84       m = m + unsmob_music (ly_car (p))->length_mom ();
  85       done ++;
  86       if (repeat_count () - done < scm_ilength (alternatives ()))
  87         p = ly_cdr (p);
  88     }
  89   return m;
  90 }
  91
  92 /*
  93   Sum all duration of all available alternatives. This is for the case
  94   of volta repeats, where the alternatives are iterated just as they
  95   were entered.  */
  96 Moment
  97 Repeated_music::alternatives_volta_length_mom () const
  98 {
  99   if (!alternatives ())
 100     return 0;
 101
 102   Moment m;
 103   SCM p = alternatives ();
 104   while (gh_pair_p (p))
 105     {
 106       m = m + unsmob_music (ly_car (p))->length_mom ();
 107       p = ly_cdr (p);
 108     }
 109   return m;
 110 }
 111
 112
 113 /*
 114   Length of the body in THIS. Disregards REPEAT-COUNT.
 115  */
 116 Moment
 117 Repeated_music::body_length_mom () const
 118 {
 119   Moment m = 0;
 120   if (body ())
 121     {
 122       m = body ()->length_mom ();
 123     }
 124   return m;
 125 }
 126
 127 int
 128 Repeated_music::repeat_count () const
 129 {
 130   return gh_scm2int (get_mus_property ("repeat-count"));
 131 }
 132
 133
 134 MAKE_SCHEME_CALLBACK (Repeated_music,unfolded_music_length, 1);
 135 MAKE_SCHEME_CALLBACK (Repeated_music,folded_music_length, 1);
 136 MAKE_SCHEME_CALLBACK (Repeated_music,volta_music_length, 1);
 137
 138 SCM
 139 Repeated_music::unfolded_music_length (SCM m)
 140 {
 141   Repeated_music* r = dynamic_cast<Repeated_music*> (unsmob_music (m));
 142
 143   Moment l = Moment (r->repeat_count ()) * r->body_length_mom () + r->alternatives_length_mom (false);
 144   return l.smobbed_copy ();
 145 }
 146
 147 SCM
 148 Repeated_music::folded_music_length (SCM m)
 149 {
 150   Repeated_music* r = dynamic_cast<Repeated_music*> (unsmob_music (m));
 151
 152   Moment l =  r->body_length_mom () + r->alternatives_length_mom (true);
 153   return l.smobbed_copy ();
 154 }
 155
 156 SCM
 157 Repeated_music::volta_music_length (SCM m)
 158 {
 159   Repeated_music* r = dynamic_cast<Repeated_music*> (unsmob_music (m));
 160   Moment l =  r->body_length_mom () + r->alternatives_volta_length_mom ();
 161   return l.smobbed_copy ();
 162 }
 163
 164 ADD_MUSIC (Repeated_music);
 165
 166 Repeated_music::Repeated_music ()
 167   : Music (SCM_EOL)
 168 {
 169  set_mus_property ("type", ly_symbol2scm ("repeated-music"));
 170 }
 171
 172
 173 MAKE_SCHEME_CALLBACK (Repeated_music,minimum_start, 1);
 174 MAKE_SCHEME_CALLBACK (Repeated_music,first_start, 1);
 175
 176 SCM
 177 Repeated_music::minimum_start (SCM m)
 178 {
 179   Music * me = unsmob_music (m);
 180   Music * body = unsmob_music (me->get_mus_property ("element"));
 181
 182   if (body)
 183     return body->start_mom ().smobbed_copy();
 184   else
 185     {
 186       return Music_sequence::minimum_start (me->get_mus_property ("elements")).smobbed_copy();
 187     }
 188 }
 189
 190 SCM
 191 Repeated_music::first_start (SCM m)
 192 {
 193   Music * me = unsmob_music (m);
 194   Music * body = unsmob_music (me->get_mus_property ("element"));
 195
 196   Moment rv =  (body) ? body->start_mom () :
 197     Music_sequence::first_start (me->get_mus_property ("elements"));
 198
 199   return rv.smobbed_copy ();
 200 }