lily/percent-repeat-iterator.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2001--2011  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 "context.hh"
  22 #include "input.hh"
  23 #include "repeated-music.hh"
  24 #include "sequential-iterator.hh"
  25
  26 class Percent_repeat_iterator : public Sequential_iterator
  27 {
  28 public:
  29   DECLARE_CLASSNAME (Percent_repeat_iterator);
  30   DECLARE_SCHEME_CALLBACK (constructor, ());
  31   Percent_repeat_iterator ();
  32 protected:
  33   virtual SCM get_music_list () const;
  34 };
  35
  36 IMPLEMENT_CTOR_CALLBACK (Percent_repeat_iterator);
  37
  38 Percent_repeat_iterator::Percent_repeat_iterator ()
  39 {
  40 }
  41
  42 SCM
  43 Percent_repeat_iterator::get_music_list () const
  44 {
  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   Moment measure_len = measure_length (get_outlet ());
  50   Moment music_len = robust_scm2moment (length, Moment (0));
  51
  52   string event_type;
  53   SCM slash_count = SCM_EOL;
  54
  55   if (measure_len == music_len)
  56     event_type = "PercentEvent";
  57   else if (measure_len * Moment (2) == music_len)
  58     event_type = "DoublePercentEvent";
  59   else
  60     {
  61       slash_count
  62         = scm_call_1 (ly_lily_module_constant ("calc-repeat-slash-count"),
  63                       child->self_scm ());
  64       event_type = "RepeatSlashEvent";
  65     }
  66
  67   int repeats = scm_to_int (mus->get_property ("repeat-count"));
  68   for (int i = repeats; i > 1; i--)
  69   {
  70     Music *percent = make_music_by_name (ly_symbol2scm (event_type.c_str ()));
  71     percent->set_spot (*mus->origin ());
  72     percent->set_property ("length", length);
  73     if (repeats > 1)
  74       {
  75         percent->set_property ("repeat-count", scm_from_int (i));
  76         if (event_type == "RepeatSlashEvent")
  77           percent->set_property ("slash-count", slash_count);
  78       }
  79
  80     child_list = scm_cons (percent->unprotect (), child_list);
  81   }
  82
  83   child_list = scm_cons (child->self_scm (), child_list);
  84
  85   return child_list;
  86 }