2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2002--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
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.
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.
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/>.
21 #include "sequential-iterator.hh"
24 class Volta_repeat_iterator : public Sequential_iterator
27 DECLARE_SCHEME_CALLBACK (constructor, ());
28 Volta_repeat_iterator ();
30 void add_repeat_command (SCM);
32 virtual SCM get_music_list () const;
33 virtual void next_element (bool);
34 virtual void construct_children ();
35 virtual void process (Moment);
36 virtual void derived_mark () const;
45 Volta_repeat_iterator::Volta_repeat_iterator ()
47 done_count_ = alt_count_ = rep_count_ = 0;
49 alt_restores_ = SCM_EOL;
53 Volta_repeat_iterator::derived_mark () const
55 scm_gc_mark (alt_restores_);
59 Volta_repeat_iterator::get_music_list ()const
61 return scm_cons (get_music ()->get_property ("element"),
62 Sequential_iterator::get_music_list ());
66 Volta_repeat_iterator::construct_children ()
68 Sequential_iterator::construct_children ();
70 SCM alts = get_music ()->get_property ("elements");
72 alt_count_ = int (scm_ilength (alts));
73 rep_count_ = scm_to_int (get_music ()->get_property ("repeat-count"));
78 TODO: add source information for debugging
81 Volta_repeat_iterator::add_repeat_command (SCM what)
83 SCM reps = ly_symbol2scm ("repeatCommands");
84 SCM current_reps = SCM_EOL;
85 Context *where = get_outlet ()->where_defined (reps, ¤t_reps);
88 && (current_reps == SCM_EOL || scm_is_pair (current_reps)))
90 current_reps = scm_cons (what, current_reps);
91 where->set_property (reps, current_reps);
96 Volta_repeat_iterator::next_element (bool side_effect)
100 Sequential_iterator::next_element (side_effect);
106 string repstr = ::to_string (rep_count_ - alt_count_ + done_count_) + ".";
107 if (done_count_ <= 1)
109 alt_restores_ = SCM_EOL;
110 if (to_boolean (get_outlet ()->get_property ("timing")))
112 for (SCM lst = get_outlet ()->get_property ("alternativeRestores");
117 Context *t = get_outlet ()->where_defined (scm_car (lst),
121 alt_restores_ = scm_cons
122 (scm_list_3 (t->self_scm (), scm_car (lst), res),
131 add_repeat_command (scm_list_n (ly_symbol2scm ("volta"), SCM_BOOL_F, SCM_UNDEFINED));
133 if (done_count_ - 1 < alt_count_)
134 add_repeat_command (ly_symbol2scm ("end-repeat"));
136 if (to_boolean (get_outlet ()->get_property ("timing")))
138 for (SCM p = alt_restores_; scm_is_pair (p); p = scm_cdr (p))
139 scm_apply_0 (ly_lily_module_constant ("ly:context-set-property!"),
144 if (done_count_ == 1 && alt_count_ < rep_count_)
145 repstr = "1.--" + ::to_string (rep_count_ - alt_count_ + done_count_) + ".";
147 if (done_count_ <= alt_count_)
148 add_repeat_command (scm_list_n (ly_symbol2scm ("volta"),
149 ly_string2scm (repstr), SCM_UNDEFINED));
152 add_repeat_command (ly_symbol2scm ("end-repeat"));
157 Volta_repeat_iterator::process (Moment m)
161 add_repeat_command (ly_symbol2scm ("start-repeat"));
164 Sequential_iterator::process (m);
167 IMPLEMENT_CTOR_CALLBACK (Volta_repeat_iterator);