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;
19 children_list_ = SCM_EOL;
22 Simultaneous_music_iterator::Simultaneous_music_iterator (Simultaneous_music_iterator const& src)
23 : Music_iterator (src)
26 = src.separate_contexts_b_;
28 SCM children_list = SCM_EOL;
29 SCM *tail = &children_list;
30 for (SCM s = src.children_list_; gh_pair_p (s); s = gh_cdr(s))
32 Music_iterator *i = unsmob_iterator (gh_car (s));
33 SCM cl = i->clone ()->self_scm();
34 *tail = scm_cons (cl, *tail);
35 tail = SCM_CDRLOC (*tail);
36 scm_gc_unprotect_object (cl);
39 children_list_ = children_list;
40 scm_remember_upto_here_1 (children_list);
44 Simultaneous_music_iterator::derived_mark()const
46 scm_gc_mark (children_list_);
50 Simultaneous_music_iterator::get_pending_events (Moment m)const
53 for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
55 l = gh_append2 (unsmob_iterator (gh_car (s))->get_pending_events (m), l);
61 Simultaneous_music_iterator::construct_children ()
65 SCM i = get_music ()->get_mus_property ("elements");
67 children_list_ = SCM_EOL;
68 SCM * tail = &children_list_;
69 for (; gh_pair_p (i); i = ly_cdr (i), j++)
71 Music *mus = unsmob_music (ly_car (i));
73 SCM scm_iter = get_static_get_iterator (mus);
74 Music_iterator * mi = unsmob_iterator (scm_iter);
76 /* if separate_contexts_b_ is set, create a new context with the
77 number number as name */
79 Translator_group * t = (j && separate_contexts_b_)
80 ? report_to ()->find_create_translator (report_to ()->type_string_,
87 mi->init_translator (mus, t);
88 mi->construct_children ();
92 *tail = scm_cons (scm_iter, *tail);
93 tail = SCM_CDRLOC (*tail);
96 mi->set_translator (0);
101 Simultaneous_music_iterator::process (Moment until)
103 SCM *proc = &children_list_;
104 while(gh_pair_p (*proc))
106 Music_iterator * i = unsmob_iterator (gh_car (*proc));
107 if (i->pending_moment () == until)
114 *proc = gh_cdr (*proc);
118 proc = SCM_CDRLOC(*proc);
124 Simultaneous_music_iterator::skip (Moment until)
126 SCM *proc = &children_list_;
127 while(gh_pair_p (*proc))
129 Music_iterator * i = unsmob_iterator (gh_car (*proc));
130 if (i->pending_moment () <= until)
137 *proc = gh_cdr (*proc);
141 proc = SCM_CDRLOC(*proc);
147 Simultaneous_music_iterator::pending_moment () const
150 next.set_infinite (1);
152 for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
153 next = next <? unsmob_iterator (gh_car (s))->pending_moment () ;
160 Simultaneous_music_iterator::ok () const
162 return gh_pair_p (children_list_);
166 Simultaneous_music_iterator::try_music_in_children (Music *m) const
168 Music_iterator * b=0;
169 for (SCM s = children_list_; !b && gh_pair_p (s); s = gh_cdr(s))
170 b =unsmob_iterator (gh_car (s))->try_music (m);
175 Simultaneous_music_iterator::do_quit ()
177 for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
178 unsmob_iterator (gh_car (s))->quit();
182 IMPLEMENT_CTOR_CALLBACK (Simultaneous_music_iterator);