2 music-iterator.cc -- implement Music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 UGH. too many includes.
13 #include "music-iterator.hh"
14 #include "translator-group.hh"
15 #include "music-wrapper.hh"
16 #include "music-wrapper-iterator.hh"
17 #include "simple-music-iterator.hh"
18 #include "ly-smobs.icc"
20 Music_iterator::Music_iterator ()
26 Music_iterator::Music_iterator (Music_iterator const& src)
28 handle_ = *src.handle_.clone ();
30 music_length_ = src.music_length_;
31 start_mom_ = src.start_mom_;
35 Music_iterator::~Music_iterator ()
40 Music_iterator::report_to () const
42 return handle_.report_to ();
46 Music_iterator::set_translator (Translator_group *trans)
48 handle_.set_translator (trans);
52 Music_iterator::construct_children ()
57 Music_iterator::pending_moment () const
63 Music_iterator::process (Moment)
68 Music_iterator::ok () const
74 Music_iterator::skip (Moment)
79 Music_iterator::get_pending_events (Moment)const
85 Music_iterator::get_static_get_iterator (Music *m)
87 Music_iterator * p =0;
89 SCM ctor = m->get_mus_property ("iterator-ctor") ;
91 if (gh_procedure_p (ctor))
93 iter = gh_call0 (ctor);
94 p = unsmob_iterator (iter);
98 if (dynamic_cast<Music_wrapper *> (m))
99 p = new Music_wrapper_iterator;
101 p = new Simple_music_iterator;
103 iter = p->self_scm();
104 scm_gc_unprotect_object (iter);
109 p->music_length_ = m->length_mom ();
110 p->start_mom_ = m->start_mom ();
116 Music_iterator::music_length_mom () const
118 return music_length_;
122 Music_iterator::music_start_mom ()const
128 Music_iterator::init_translator (Music *m, Translator_group *report)
133 set_translator (report);
138 Music_iterator::get_iterator (Music *m) const
140 SCM ip = get_static_get_iterator (m);
141 Music_iterator*p = unsmob_iterator (ip);
143 p->init_translator (m, report_to ());
145 p->construct_children ();
150 TODO: rename to prevent confusion between Translator::try_music and
155 Music_iterator::try_music (Music *m) const
157 bool b = report_to ()->try_music ((Music*)m); // ugh
158 Music_iterator * it = b ? (Music_iterator*) this : 0; // ugh
160 it = try_music_in_children (m);
165 Music_iterator::try_music_in_children (Music *) const
170 IMPLEMENT_CTOR_CALLBACK (Music_iterator);
173 Music_iterator::get_music () const
178 /****************************************************************/
180 IMPLEMENT_TYPE_P (Music_iterator, "ly-iterator?");
181 IMPLEMENT_SMOBS(Music_iterator);
182 IMPLEMENT_DEFAULT_EQUAL_P(Music_iterator);
185 Music_iterator::mark_smob (SCM smob)
187 Music_iterator * mus = (Music_iterator *)SCM_CELL_WORD_1 (smob);
189 mus->derived_mark ();
191 Careful with GC, although we intend the following as pointers
192 only, we _must_ mark them.
194 if (mus->report_to())
195 scm_gc_mark (mus->report_to()->self_scm());
197 scm_gc_mark (mus->music_->self_scm());
204 Music_iterator::print_smob (SCM , SCM port, scm_print_state*)
206 scm_puts ("#<Music iterator>", port);
211 Music_iterator::derived_mark()const
216 Music_iterator::quit ()
223 Music_iterator::do_quit()