lily/percent-repeat-iterator.cc

   1 /*
   2   percent-repeat-iterator.cc -- implement Percent_repeat_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2001--2007  Han-Wen Nienhuys <hanwen@xs4all.nl>
   7                   Erik Sandberg <mandolaerik@gmail.com>
   8 */
   9
  10 #include "input.hh"
  11 #include "repeated-music.hh"
  12 #include "sequential-iterator.hh"
  13
  14 class Percent_repeat_iterator : public Sequential_iterator
  15 {
  16 public:
  17   DECLARE_CLASSNAME (Percent_repeat_iterator);
  18   DECLARE_SCHEME_CALLBACK (constructor, ());
  19   Percent_repeat_iterator ();
  20 protected:
  21   virtual SCM get_music_list () const;
  22 };
  23
  24 IMPLEMENT_CTOR_CALLBACK (Percent_repeat_iterator);
  25
  26 Percent_repeat_iterator::Percent_repeat_iterator ()
  27 {
  28 }
  29
  30 SCM
  31 Percent_repeat_iterator::get_music_list () const
  32 {
  33   /* TODO: Distinction between percent, double-percent and slash */
  34   Music *mus = get_music ();
  35   Music *child = Repeated_music::body (mus);
  36   SCM length = child->get_length ().smobbed_copy ();
  37   SCM child_list = SCM_EOL;
  38
  39   int repeats = scm_to_int (mus->get_property ("repeat-count"));
  40   for (int i = repeats; i > 1; i--)
  41   {
  42     Music *percent = make_music_by_name (ly_symbol2scm ("PercentEvent"));
  43     percent->set_spot (*mus->origin ());
  44     percent->set_property ("length", length);
  45     if (repeats > 1)
  46       percent->set_property ("repeat-count", scm_int2num (i));
  47
  48     child_list = scm_cons (percent->unprotect (), child_list);
  49   }
  50
  51   child_list = scm_cons (child->self_scm (), child_list);
  52
  53   return child_list;
  54 }