lily/repeated-music.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1999--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "repeated-music.hh"
  21 #include "music-sequence.hh"
  22 #include "pitch.hh"
  23 #include "warn.hh"
  24 #include "program-option.hh"
  25
  26 Music *
  27 Repeated_music::body (Music *me)
  28 {
  29   return unsmob_music (me->get_property ("element"));
  30 }
  31
  32 SCM
  33 Repeated_music::alternatives (Music *me)
  34 {
  35   return me->get_property ("elements");
  36 }
  37
  38 MAKE_SCHEME_CALLBACK (Repeated_music, relative_callback, 2);
  39 SCM
  40 Repeated_music::relative_callback (SCM music, SCM pitch)
  41 {
  42   Pitch p = *unsmob_pitch (pitch);
  43   Music *me = unsmob_music (music);
  44   if (lily_1_8_relative)
  45     {
  46       Music *body = unsmob_music (me->get_property ("element"));
  47       if (body)
  48         p = body->to_relative_octave (p);
  49
  50       Pitch last = p;
  51       SCM alternatives = me->get_property ("elements");
  52
  53       for (SCM s = alternatives; scm_is_pair (s); s = scm_cdr (s))
  54         {
  55           lily_1_8_compatibility_used = true;
  56           unsmob_music (scm_car (s))->to_relative_octave (p);
  57         }
  58
  59       return last.smobbed_copy ();
  60     }
  61   else
  62     return me->generic_to_relative_octave (p).smobbed_copy ();
  63 }
  64
  65 Moment
  66 Repeated_music::alternatives_get_length (Music *me, bool fold)
  67 {
  68   SCM alternative_list = alternatives (me);
  69   int len = scm_ilength (alternative_list);
  70   if (len <= 0)
  71     return 0;
  72
  73   if (fold)
  74     return Music_sequence::maximum_length (alternative_list);
  75
  76   Moment m = 0;
  77   int done = 0;
  78   int count = robust_scm2int (me->get_property ("repeat-count"), 0);
  79
  80   SCM p = alternative_list;
  81   while (scm_is_pair (p) && done < count)
  82     {
  83       m = m + unsmob_music (scm_car (p))->get_length ();
  84       done++;
  85       if (count - done < len)
  86         p = scm_cdr (p);
  87     }
  88   return m;
  89 }
  90
  91 /*
  92   Sum all duration of all available alternatives. This is for the case
  93   of volta repeats, where the alternatives are iterated just as they
  94   were entered.  */
  95 Moment
  96 Repeated_music::alternatives_volta_get_length (Music *me)
  97 {
  98   return Music_sequence::cumulative_length (alternatives (me));
  99 }
 100
 101 /*
 102   Length of the body in THIS. Disregards REPEAT-COUNT.
 103 */
 104 Moment
 105 Repeated_music::body_get_length (Music *me)
 106 {
 107   Moment m = 0;
 108   if (Music *body = unsmob_music (me->get_property ("element")))
 109     m = body->get_length ();
 110   return m;
 111 }
 112
 113 MAKE_SCHEME_CALLBACK (Repeated_music, unfolded_music_length, 1);
 114
 115 SCM
 116 Repeated_music::unfolded_music_length (SCM m)
 117 {
 118   Music *me = unsmob_music (m);
 119
 120   Moment l = Moment (repeat_count (me)) * body_get_length (me) + alternatives_get_length (me, false);
 121   return l.smobbed_copy ();
 122 }
 123
 124 MAKE_SCHEME_CALLBACK (Repeated_music, folded_music_length, 1);
 125 SCM
 126 Repeated_music::folded_music_length (SCM m)
 127 {
 128   Music *me = unsmob_music (m);
 129
 130   Moment l = body_get_length (me) + alternatives_get_length (me, true);
 131   return l.smobbed_copy ();
 132 }
 133
 134 int
 135 Repeated_music::repeat_count (Music *me)
 136 {
 137   return scm_to_int (me->get_property ("repeat-count"));
 138 }
 139
 140 MAKE_SCHEME_CALLBACK (Repeated_music, volta_music_length, 1);
 141 SCM
 142 Repeated_music::volta_music_length (SCM m)
 143 {
 144   Music *me = unsmob_music (m);
 145   Moment l = body_get_length (me) + alternatives_volta_get_length (me);
 146   return l.smobbed_copy ();
 147 }
 148
 149 MAKE_SCHEME_CALLBACK (Repeated_music, minimum_start, 1);
 150 SCM
 151 Repeated_music::minimum_start (SCM m)
 152 {
 153   Music *me = unsmob_music (m);
 154   Music *body = unsmob_music (me->get_property ("element"));
 155
 156   if (body)
 157     return body->start_mom ().smobbed_copy ();
 158   else
 159     return Music_sequence::minimum_start (me->get_property ("elements")).smobbed_copy ();
 160 }
 161
 162 MAKE_SCHEME_CALLBACK (Repeated_music, first_start, 1);
 163 SCM
 164 Repeated_music::first_start (SCM m)
 165 {
 166   Music *me = unsmob_music (m);
 167   Music *body = unsmob_music (me->get_property ("element"));
 168
 169   Moment rv = (body) ? body->start_mom ()
 170     : Music_sequence::first_start (me->get_property ("elements"));
 171
 172   return rv.smobbed_copy ();
 173 }