lily/percent-repeat-iterator.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2001--2010  Han-Wen Nienhuys <hanwen@xs4all.nl>
   5                   Erik Sandberg <mandolaerik@gmail.com>
   6
   7   LilyPond is free software: you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License as published by
   9   the Free Software Foundation, either version 3 of the License, or
  10   (at your option) any later version.
  11
  12   LilyPond is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "input.hh"
  22 #include "repeated-music.hh"
  23 #include "sequential-iterator.hh"
  24
  25 class Percent_repeat_iterator : public Sequential_iterator
  26 {
  27 public:
  28   DECLARE_CLASSNAME (Percent_repeat_iterator);
  29   DECLARE_SCHEME_CALLBACK (constructor, ());
  30   Percent_repeat_iterator ();
  31 protected:
  32   virtual SCM get_music_list () const;
  33 };
  34
  35 IMPLEMENT_CTOR_CALLBACK (Percent_repeat_iterator);
  36
  37 Percent_repeat_iterator::Percent_repeat_iterator ()
  38 {
  39 }
  40
  41 SCM
  42 Percent_repeat_iterator::get_music_list () const
  43 {
  44   /* TODO: Distinction between percent, double-percent and slash */
  45   Music *mus = get_music ();
  46   Music *child = Repeated_music::body (mus);
  47   SCM length = child->get_length ().smobbed_copy ();
  48   SCM child_list = SCM_EOL;
  49
  50   int repeats = scm_to_int (mus->get_property ("repeat-count"));
  51   for (int i = repeats; i > 1; i--)
  52   {
  53     Music *percent = make_music_by_name (ly_symbol2scm ("PercentEvent"));
  54     percent->set_spot (*mus->origin ());
  55     percent->set_property ("length", length);
  56     if (repeats > 1)
  57       percent->set_property ("repeat-count", scm_int2num (i));
  58
  59     child_list = scm_cons (percent->unprotect (), child_list);
  60   }
  61
  62   child_list = scm_cons (child->self_scm (), child_list);
  63
  64   return child_list;
  65 }