lily/unfolded-repeat-iterator.cc

   1 /*
   2   unfolded-repeat-iterator.cc -- implement Unfolded_repeat_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2002--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "music.hh"
  10 #include "sequential-iterator.hh"
  11 #include "context.hh"
  12
  13 class Unfolded_repeat_iterator : public Sequential_iterator
  14 {
  15 public:
  16   DECLARE_SCHEME_CALLBACK (constructor, ());
  17 protected:
  18   virtual SCM get_music_list () const;
  19 };
  20
  21 SCM
  22 Unfolded_repeat_iterator::get_music_list () const
  23 {
  24   SCM l = SCM_EOL;
  25   SCM *tail = &l;
  26
  27   SCM body = get_music ()->get_property ("element");
  28   SCM alts = get_music ()->get_property ("elements");
  29   int alt_count = scm_ilength (alts);
  30   int rep_count = scm_to_int (get_music ()->get_property ("repeat-count"));
  31
  32   for (int i = 0; i < rep_count; i++)
  33     {
  34       if (unsmob_music (body))
  35         *tail = scm_cons (body, SCM_EOL);
  36
  37       tail = SCM_CDRLOC (*tail);
  38
  39       if (alt_count)
  40         {
  41           *tail = scm_cons (scm_car (alts), SCM_EOL);
  42           tail = SCM_CDRLOC (*tail);
  43           if (i >= rep_count - alt_count)
  44
  45             alts = scm_cdr (alts);
  46         }
  47     }
  48
  49   return l;
  50 }
  51
  52 IMPLEMENT_CTOR_CALLBACK (Unfolded_repeat_iterator);