2 Simultaneous_music-iterator.cc -- implement Simultaneous_music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "translator-group.hh"
11 #include "simultaneous-music-iterator.hh"
12 #include "music-list.hh"
13 #include "killing-cons.tcc"
15 Simultaneous_music_iterator::Simultaneous_music_iterator ()
17 separate_contexts_b_ = false;
21 Simultaneous_music_iterator::Simultaneous_music_iterator (Simultaneous_music_iterator const& src)
22 : Music_iterator (src)
24 cursor_i_ = src.cursor_i_;
25 separate_contexts_b_ = src.separate_contexts_b_;
26 for (Cons<Music_iterator> *p = children_p_list_.head_; p; p = p->next_)
28 Music_iterator *i = p->car_;
29 children_p_list_.append (new Killing_cons<Music_iterator> (i->clone (), 0));
33 Simultaneous_music_iterator::~Simultaneous_music_iterator ()
35 children_p_list_.junk ();
39 Simultaneous_music_iterator::next ()
41 if (cursor_i_ < children_p_list_.size_i ())
43 return cursor_i_ < children_p_list_.size_i ();
47 Simultaneous_music_iterator::get_music ()
49 if (cursor_i_ < children_p_list_.size_i ())
51 Cons<Music_iterator> *p = children_p_list_.head_;
52 for (int i = 0; i <= cursor_i_ && p; i++)
55 return p->car_->get_music ();
61 Simultaneous_music_iterator::construct_children()
64 Music_sequence const *sim = dynamic_cast<Music_sequence const*> (music_l_);
66 SCM i = sim->music_list ();
67 for (; gh_pair_p(i); i = gh_cdr(i), j++)
69 Music *mus = unsmob_music (gh_car (i));
70 Music_iterator * mi = static_get_iterator_p (mus);
72 /* if separate_contexts_b_ is set, create a new context with the
73 number number as name */
75 Translator_group * t = (j && separate_contexts_b_)
76 ? report_to_l ()->find_create_translator_l (report_to_l()->type_str_,
83 mi->init_translator (mus, t);
84 mi->construct_children ();
88 children_p_list_.append (new Killing_cons<Music_iterator> (mi,0));
96 Simultaneous_music_iterator::do_print() const
99 for (Cons<Music_iterator> *p = children_p_list_.head_; p; p = p->next_)
105 Simultaneous_music_iterator::do_process_and_next (Moment until)
107 for (Cons<Music_iterator> **pp = &children_p_list_.head_; *pp; )
109 Music_iterator * i = (*pp)->car_;
110 if (i->next_moment() == until)
112 i->process_and_next (until);
115 delete children_p_list_.remove_cons (pp);
119 Music_iterator::do_process_and_next (until);
126 Simultaneous_music_iterator::next_moment() const
129 next.set_infinite (1);
131 for (Cons<Music_iterator> *p = children_p_list_.head_; p; p = p->next_)
132 next = next <? p->car_->next_moment() ;
139 Simultaneous_music_iterator::ok() const
141 return children_p_list_.head_;
145 Simultaneous_music_iterator::try_music_in_children (Music *m) const
147 Music_iterator * b=0;
148 for (Cons<Music_iterator> *p = children_p_list_.head_; !b && p; p = p->next_)
149 b =p->car_->try_music (m);