2 Simultaneous_music-iterator.cc -- implement Simultaneous_music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 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"
16 Simultaneous_music_iterator::Simultaneous_music_iterator ()
18 separate_contexts_b_ = false;
21 Simultaneous_music_iterator::Simultaneous_music_iterator (Simultaneous_music_iterator const& src)
22 : Music_iterator (src)
24 separate_contexts_b_ = src.separate_contexts_b_;
25 for (Cons<Music_iterator> *p = src.children_p_list_.head_; p; p = p->next_)
27 Music_iterator *i = p->car_;
28 children_p_list_.append (new Killing_cons<Music_iterator> (i->clone (), 0));
32 Simultaneous_music_iterator::~Simultaneous_music_iterator ()
34 children_p_list_.junk ();
38 Simultaneous_music_iterator::get_pending_events (Moment m)const
41 for (Cons<Music_iterator> *p = children_p_list_.head_; p; p = p->next_)
43 s = gh_append2 (p->car_->get_pending_events (m), s);
49 Simultaneous_music_iterator::construct_children ()
53 SCM i = get_music ()->get_mus_property ("elements");
54 for (; gh_pair_p (i); i = ly_cdr (i), j++)
56 Music *mus = unsmob_music (ly_car (i));
57 Music_iterator * mi = get_static_get_iterator (mus);
59 /* if separate_contexts_b_ is set, create a new context with the
60 number number as name */
62 Translator_group * t = (j && separate_contexts_b_)
63 ? report_to ()->find_create_translator (report_to ()->type_string_,
70 mi->init_translator (mus, t);
71 mi->construct_children ();
75 children_p_list_.append (new Killing_cons<Music_iterator> (mi,0));
84 Simultaneous_music_iterator::process (Moment until)
86 for (Cons<Music_iterator> **pp = &children_p_list_.head_; *pp;)
88 Music_iterator * i = (*pp)->car_;
89 if (i->pending_moment () == until)
94 delete children_p_list_.remove_cons (pp);
101 Simultaneous_music_iterator::skip (Moment until)
103 for (Cons<Music_iterator> **pp = &children_p_list_.head_; *pp;)
105 Music_iterator * i = (*pp)->car_;
106 if (i->pending_moment () <= until)
111 delete children_p_list_.remove_cons (pp);
118 Simultaneous_music_iterator::pending_moment () const
121 next.set_infinite (1);
123 for (Cons<Music_iterator> *p = children_p_list_.head_; p; p = p->next_)
124 next = next <? p->car_->pending_moment () ;
131 Simultaneous_music_iterator::ok () const
133 return children_p_list_.head_;
137 Simultaneous_music_iterator::try_music_in_children (Music *m) const
139 Music_iterator * b=0;
140 for (Cons<Music_iterator> *p = children_p_list_.head_; !b && p; p = p->next_)
141 b =p->car_->try_music (m);
147 IMPLEMENT_CTOR_CALLBACK (Simultaneous_music_iterator);