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 "context-specced-music.hh"
20 #include "ly-smobs.icc"
22 Music_iterator::Music_iterator ()
28 Music_iterator::Music_iterator (Music_iterator const& src)
30 handle_ = *src.handle_.clone ();
32 music_length_ = src.music_length_;
33 start_mom_ = src.start_mom_;
37 Music_iterator::~Music_iterator ()
42 Music_iterator::report_to () const
44 return handle_.report_to ();
48 Music_iterator::set_translator (Translator_group *trans)
50 handle_.set_translator (trans);
54 Music_iterator::construct_children ()
59 Music_iterator::pending_moment () const
65 Music_iterator::process (Moment)
70 Music_iterator::ok () const
76 Music_iterator::skip (Moment)
81 Music_iterator::get_pending_events (Moment)const
87 Music_iterator::get_static_get_iterator (Music *m)
89 Music_iterator * p =0;
91 SCM ctor = m->get_mus_property ("iterator-ctor") ;
93 if (gh_procedure_p (ctor))
95 iter = gh_call0 (ctor);
96 p = unsmob_iterator (iter);
100 if (dynamic_cast<Music_wrapper *> (m))
101 p = new Music_wrapper_iterator;
103 p = new Simple_music_iterator;
105 iter = p->self_scm();
106 scm_gc_unprotect_object (iter);
111 p->music_length_ = m->length_mom ();
112 p->start_mom_ = m->start_mom ();
118 Music_iterator::music_length_mom () const
120 return music_length_;
124 Music_iterator::music_start_mom ()const
130 Music_iterator::init_translator (Music *m, Translator_group *report)
134 if (Context_specced_music * csm =dynamic_cast<Context_specced_music *> (m))
136 SCM ct = csm->get_mus_property ("context-type");
138 if (gh_string_p (ct))
139 c_type = ly_scm2string (ct);
142 SCM ci = csm->get_mus_property ("context-id");
143 if (gh_string_p (ci))
144 c_id = ly_scm2string (ci);
147 =report->find_create_translator (c_type, c_id);
154 set_translator (report);
159 Music_iterator::get_iterator (Music *m) const
161 SCM ip = get_static_get_iterator (m);
162 Music_iterator*p = unsmob_iterator (ip);
164 p->init_translator (m, report_to ());
166 p->construct_children ();
171 TODO: rename to prevent confusion between Translator::try_music and
176 Music_iterator::try_music (Music *m) const
178 bool b = report_to ()->try_music ((Music*)m); // ugh
179 Music_iterator * it = b ? (Music_iterator*) this : 0; // ugh
181 it = try_music_in_children (m);
186 Music_iterator::try_music_in_children (Music *) const
191 IMPLEMENT_CTOR_CALLBACK (Music_iterator);
194 Music_iterator::get_music () const
199 /****************************************************************/
201 IMPLEMENT_TYPE_P (Music_iterator, "ly-iterator?");
202 IMPLEMENT_SMOBS(Music_iterator);
203 IMPLEMENT_DEFAULT_EQUAL_P(Music_iterator);
206 Music_iterator::mark_smob (SCM smob)
208 Music_iterator * mus = (Music_iterator *)SCM_CELL_WORD_1 (smob);
210 mus->derived_mark ();
212 Careful with GC, although we intend the following as pointers
213 only, we _must_ mark them.
215 if (mus->report_to())
216 scm_gc_mark (mus->report_to()->self_scm());
218 scm_gc_mark (mus->music_->self_scm());
225 Music_iterator::print_smob (SCM , SCM port, scm_print_state*)
227 scm_puts ("#<Music iterator>", port);
232 Music_iterator::derived_mark()const
237 Music_iterator::quit ()
244 Music_iterator::do_quit()