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--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "repeated-music.hh"
  10 #include "music-sequence.hh"
  11 #include "pitch.hh"
  12 #include "warn.hh"
  13 #include "program-option.hh"
  14
  15 Music *
  16 Repeated_music::body (Music *me)
  17 {
  18   return unsmob_music (me->get_property ("element"));
  19 }
  20
  21 SCM
  22 Repeated_music::alternatives (Music *me)
  23 {
  24   return me->get_property ("elements");
  25 }
  26
  27 MAKE_SCHEME_CALLBACK (Repeated_music, relative_callback, 2);
  28 SCM
  29 Repeated_music::relative_callback (SCM music, SCM pitch)
  30 {
  31   Pitch p = *unsmob_pitch (pitch);
  32   Music *me = unsmob_music (music);
  33   if (lily_1_8_relative)
  34     {
  35       Music *body = unsmob_music (me->get_property ("element"));
  36       if (body)
  37         p = body->to_relative_octave (p);
  38
  39       Pitch last = p;
  40       SCM alternatives = me->get_property ("elements");
  41
  42       for (SCM s = alternatives; scm_is_pair (s); s = scm_cdr (s))
  43         {
  44           lily_1_8_compatibility_used = true;
  45           unsmob_music (scm_car (s))->to_relative_octave (p);
  46         }
  47
  48       return last.smobbed_copy ();
  49     }
  50   else
  51     return me->generic_to_relative_octave (p).smobbed_copy ();
  52 }
  53
  54 Moment
  55 Repeated_music::alternatives_get_length (Music *me, bool fold)
  56 {
  57   SCM alternative_list = alternatives (me);
  58   int len = scm_ilength (alternative_list);
  59   if (len <= 0)
  60     return 0;
  61
  62   if (fold)
  63     return Music_sequence::maximum_length (alternative_list);
  64
  65   Moment m = 0;
  66   int done = 0;
  67   int count = robust_scm2int (me->get_property ("repeat-count"), 0);
  68
  69   SCM p = alternative_list;
  70   while (scm_is_pair (p) && done < count)
  71     {
  72       m = m + unsmob_music (scm_car (p))->get_length ();
  73       done++;
  74       if (count - done < len)
  75         p = scm_cdr (p);
  76     }
  77   return m;
  78 }
  79
  80 /*
  81   Sum all duration of all available alternatives. This is for the case
  82   of volta repeats, where the alternatives are iterated just as they
  83   were entered.  */
  84 Moment
  85 Repeated_music::alternatives_volta_get_length (Music *me)
  86 {
  87   return Music_sequence::cumulative_length (alternatives (me));
  88 }
  89
  90 /*
  91   Length of the body in THIS. Disregards REPEAT-COUNT.
  92 */
  93 Moment
  94 Repeated_music::body_get_length (Music *me)
  95 {
  96   Moment m = 0;
  97   if (Music *body = unsmob_music (me->get_property ("element")))
  98     m = body->get_length ();
  99   return m;
 100 }
 101
 102 MAKE_SCHEME_CALLBACK (Repeated_music, unfolded_music_length, 1);
 103
 104 SCM
 105 Repeated_music::unfolded_music_length (SCM m)
 106 {
 107   Music *me = unsmob_music (m);
 108
 109   Moment l = Moment (repeat_count (me)) * body_get_length (me) + alternatives_get_length (me, false);
 110   return l.smobbed_copy ();
 111 }
 112
 113 MAKE_SCHEME_CALLBACK (Repeated_music, folded_music_length, 1);
 114 SCM
 115 Repeated_music::folded_music_length (SCM m)
 116 {
 117   Music *me = unsmob_music (m);
 118
 119   Moment l = body_get_length (me) + alternatives_get_length (me, true);
 120   return l.smobbed_copy ();
 121 }
 122
 123 int
 124 Repeated_music::repeat_count (Music *me)
 125 {
 126   return scm_to_int (me->get_property ("repeat-count"));
 127 }
 128
 129 MAKE_SCHEME_CALLBACK (Repeated_music, volta_music_length, 1);
 130 SCM
 131 Repeated_music::volta_music_length (SCM m)
 132 {
 133   Music *me = unsmob_music (m);
 134   Moment l = body_get_length (me) + alternatives_volta_get_length (me);
 135   return l.smobbed_copy ();
 136 }
 137
 138 MAKE_SCHEME_CALLBACK (Repeated_music, minimum_start, 1);
 139 SCM
 140 Repeated_music::minimum_start (SCM m)
 141 {
 142   Music *me = unsmob_music (m);
 143   Music *body = unsmob_music (me->get_property ("element"));
 144
 145   if (body)
 146     return body->start_mom ().smobbed_copy ();
 147   else
 148     return Music_sequence::minimum_start (me->get_property ("elements")).smobbed_copy ();
 149 }
 150
 151 MAKE_SCHEME_CALLBACK (Repeated_music, first_start, 1);
 152 SCM
 153 Repeated_music::first_start (SCM m)
 154 {
 155   Music *me = unsmob_music (m);
 156   Music *body = unsmob_music (me->get_property ("element"));
 157
 158   Moment rv = (body) ? body->start_mom ()
 159     : Music_sequence::first_start (me->get_property ("elements"));
 160
 161   return rv.smobbed_copy ();
 162 }