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--2003 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
  30
  31 Pitch
  32 Repeated_music::to_relative_octave (Pitch p)
  33 {
  34   if (body ())
  35     p = body ()->to_relative_octave (p);
  36
  37   Pitch last = p ;
  38   if (alternatives ())
  39     for (SCM s = alternatives (); gh_pair_p (s);  s = ly_cdr (s))
  40       unsmob_music (ly_car (s))->to_relative_octave (p);
  41
  42
  43   return last;
  44 }
  45
  46 void
  47 Repeated_music::transpose (Pitch p)
  48 {
  49   if (body ())
  50     body ()->transpose (p);
  51
  52   Music_sequence::transpose_list (get_mus_property ("elements"), p);
  53 }
  54
  55 void
  56 Repeated_music::compress (Moment p)
  57 {
  58   if (body ())
  59     body ()->compress (p);
  60
  61   Music_sequence::compress_list (alternatives (), p);
  62 }
  63
  64 Moment
  65 Repeated_music::alternatives_get_length (bool fold) const
  66 {
  67   if (!alternatives ())
  68     return 0;
  69
  70   if (fold)
  71     return Music_sequence::maximum_length (alternatives ());
  72
  73   Moment m =0;
  74   int done =0;
  75
  76   SCM p = alternatives ();
  77   while (gh_pair_p (p) && done < repeat_count ())
  78     {
  79       m = m + unsmob_music (ly_car (p))->get_length ();
  80       done ++;
  81       if (repeat_count () - done < scm_ilength (alternatives ()))
  82         p = ly_cdr (p);
  83     }
  84   return m;
  85 }
  86
  87 /*
  88   Sum all duration of all available alternatives. This is for the case
  89   of volta repeats, where the alternatives are iterated just as they
  90   were entered.  */
  91 Moment
  92 Repeated_music::alternatives_volta_get_length () const
  93 {
  94   if (!alternatives ())
  95     return 0;
  96
  97   Moment m;
  98   SCM p = alternatives ();
  99   while (gh_pair_p (p))
 100     {
 101       m = m + unsmob_music (ly_car (p))->get_length ();
 102       p = ly_cdr (p);
 103     }
 104   return m;
 105 }
 106
 107
 108 /*
 109   Length of the body in THIS. Disregards REPEAT-COUNT.
 110  */
 111 Moment
 112 Repeated_music::body_get_length () const
 113 {
 114   Moment m = 0;
 115   if (body ())
 116     {
 117       m = body ()->get_length ();
 118     }
 119   return m;
 120 }
 121
 122 int
 123 Repeated_music::repeat_count () const
 124 {
 125   return gh_scm2int (get_mus_property ("repeat-count"));
 126 }
 127
 128
 129 MAKE_SCHEME_CALLBACK (Repeated_music,unfolded_music_length, 1);
 130 MAKE_SCHEME_CALLBACK (Repeated_music,folded_music_length, 1);
 131 MAKE_SCHEME_CALLBACK (Repeated_music,volta_music_length, 1);
 132
 133 SCM
 134 Repeated_music::unfolded_music_length (SCM m)
 135 {
 136   Repeated_music* r = dynamic_cast<Repeated_music*> (unsmob_music (m));
 137
 138   Moment l = Moment (r->repeat_count ()) * r->body_get_length () + r->alternatives_get_length (false);
 139   return l.smobbed_copy ();
 140 }
 141
 142 SCM
 143 Repeated_music::folded_music_length (SCM m)
 144 {
 145   Repeated_music* r = dynamic_cast<Repeated_music*> (unsmob_music (m));
 146
 147   Moment l =  r->body_get_length () + r->alternatives_get_length (true);
 148   return l.smobbed_copy ();
 149 }
 150
 151 SCM
 152 Repeated_music::volta_music_length (SCM m)
 153 {
 154   Repeated_music* r = dynamic_cast<Repeated_music*> (unsmob_music (m));
 155   Moment l =  r->body_get_length () + r->alternatives_volta_get_length ();
 156   return l.smobbed_copy ();
 157 }
 158
 159 ADD_MUSIC (Repeated_music);
 160
 161 Repeated_music::Repeated_music ()
 162   : Music ()
 163 {
 164 }
 165
 166
 167 MAKE_SCHEME_CALLBACK (Repeated_music,minimum_start, 1);
 168 MAKE_SCHEME_CALLBACK (Repeated_music,first_start, 1);
 169
 170 SCM
 171 Repeated_music::minimum_start (SCM m)
 172 {
 173   Music * me = unsmob_music (m);
 174   Music * body = unsmob_music (me->get_mus_property ("element"));
 175
 176   if (body)
 177     return body->start_mom ().smobbed_copy();
 178   else
 179     {
 180       return Music_sequence::minimum_start (me->get_mus_property ("elements")).smobbed_copy();
 181     }
 182 }
 183
 184 SCM
 185 Repeated_music::first_start (SCM m)
 186 {
 187   Music * me = unsmob_music (m);
 188   Music * body = unsmob_music (me->get_mus_property ("element"));
 189
 190   Moment rv =  (body) ? body->start_mom () :
 191     Music_sequence::first_start (me->get_mus_property ("elements"));
 192
 193   return rv.smobbed_copy ();
 194 }