2 unfolded-repeat-iterator.cc -- implement Unfolded_repeat_iterator, Volta_repeat_iterator
4 source file of the GNU LilyPond music typesetter
7 (c) 2002--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include "sequential-iterator.hh"
15 class Unfolded_repeat_iterator : public Sequential_iterator
18 DECLARE_SCHEME_CALLBACK (constructor, ());
20 virtual SCM get_music_list () const;
25 Unfolded_repeat_iterator::get_music_list () const
30 SCM body = get_music ()->get_property ("element");
31 SCM alts = get_music ()->get_property ("elements");
32 int alt_count = scm_ilength (alts);
33 int rep_count = scm_to_int (get_music ()->get_property ("repeat-count"));
35 for (int i = 0; i < rep_count; i++)
37 if (unsmob_music (body))
38 *tail = scm_cons (body, SCM_EOL) ;
40 tail = SCM_CDRLOC (*tail);
44 *tail = scm_cons (scm_car (alts), SCM_EOL);
45 tail = SCM_CDRLOC (*tail);
46 if (i >= rep_count - alt_count)
48 alts = scm_cdr (alts);
55 class Volta_repeat_iterator : public Sequential_iterator
58 DECLARE_SCHEME_CALLBACK (constructor, ());
59 Volta_repeat_iterator ();
61 void add_repeat_command (SCM);
63 virtual SCM get_music_list () const;
64 virtual void next_element (bool);
65 virtual void construct_children ();
66 virtual void process (Moment);
75 Volta_repeat_iterator::Volta_repeat_iterator ()
77 done_count_ = alt_count_ = rep_count_= 0;
82 Volta_repeat_iterator::get_music_list ()const
84 return scm_cons (get_music ()->get_property ("element"),
85 get_music ()->get_property ("elements"));
89 Volta_repeat_iterator::construct_children ()
91 Sequential_iterator::construct_children ();
93 SCM alts = get_music ()->get_property ("elements");
95 alt_count_ = scm_ilength (alts);
96 rep_count_ = scm_to_int (get_music ()->get_property ("repeat-count"));
102 TODO: add source information for debugging
105 Volta_repeat_iterator::add_repeat_command (SCM what)
107 SCM reps = ly_symbol2scm ("repeatCommands");
108 SCM current_reps = get_outlet ()->internal_get_property (reps);
110 Context * where = get_outlet ()->where_defined (reps);
112 && current_reps == SCM_EOL || scm_is_pair (current_reps))
114 current_reps = scm_cons (what, current_reps);
115 where->internal_set_property (reps, current_reps);
121 Volta_repeat_iterator::next_element (bool side_effect)
125 Sequential_iterator::next_element (side_effect);
131 String repstr = to_string (rep_count_ - alt_count_ + done_count_) + ".";
134 add_repeat_command (scm_list_n (ly_symbol2scm ("volta"), SCM_BOOL_F, SCM_UNDEFINED));
136 if (done_count_ - 1 < alt_count_)
137 add_repeat_command (ly_symbol2scm ("end-repeat"));
142 if (done_count_ == 1 && alt_count_ < rep_count_)
144 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 scm_makfrom0str (repstr.to_str0 ()), SCM_UNDEFINED));
153 add_repeat_command (ly_symbol2scm ("end-repeat"));
160 Volta_repeat_iterator::process (Moment m)
164 add_repeat_command (ly_symbol2scm ("start-repeat"));
167 Sequential_iterator::process (m);
171 IMPLEMENT_CTOR_CALLBACK (Volta_repeat_iterator);
172 IMPLEMENT_CTOR_CALLBACK (Unfolded_repeat_iterator);