2 music-iterator.cc -- implement Music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 UGH. too many includes.
13 #include "music-iterator.hh"
19 #include "music-wrapper.hh"
20 #include "music-wrapper-iterator.hh"
21 #include "simple-music-iterator.hh"
23 #include "ly-smobs.icc"
25 Music_iterator::Music_iterator ()
31 Music_iterator::Music_iterator (Music_iterator const& )
36 Music_iterator::~Music_iterator ()
41 Music_iterator::get_outlet () const
43 return handle_.get_outlet ();
47 Music_iterator::set_context (Context *trans)
49 handle_.set_context (trans);
53 Music_iterator::construct_children ()
58 Music_iterator::pending_moment () const
64 Music_iterator::process (Moment)
69 Music_iterator::ok () const
77 Music_iterator::get_static_get_iterator (Music *m)
79 Music_iterator * p = 0;
81 SCM ctor = m->get_property ("iterator-ctor") ;
83 if (ly_c_procedure_p (ctor))
85 iter = scm_call_0 (ctor);
86 p = unsmob_iterator (iter);
90 if (dynamic_cast<Music_wrapper *> (m))
91 p = new Music_wrapper_iterator;
93 p = new Simple_music_iterator;
95 iter = p->self_scm ();
96 scm_gc_unprotect_object (iter);
101 p->music_length_ = m->get_length ();
102 p->start_mom_ = m->start_mom ();
109 Music_iterator::music_get_length () const
111 return music_length_;
115 Music_iterator::music_start_mom ()const
121 Music_iterator::init_translator (Music *m, Context *report)
126 set_context (report);
130 Music_iterator::substitute_outlet (Context *f, Context *t)
132 if (get_outlet () == f)
134 derived_substitute (f,t);
138 Music_iterator::derived_substitute (Context *,Context *)
143 Music_iterator::get_iterator (Music *m) const
145 SCM ip = get_static_get_iterator (m);
146 Music_iterator*p = unsmob_iterator (ip);
148 p->init_translator (m, get_outlet ());
150 p->construct_children ();
155 TODO: rename to prevent confusion between Context::try_music and
160 Music_iterator::try_music (Music *m) const
162 bool b = get_outlet ()->try_music ((Music*)m); // ugh
163 Music_iterator * it = b ? (Music_iterator*) this : 0; // ugh
165 it = try_music_in_children (m);
170 Music_iterator::try_music_in_children (Music *) const
175 IMPLEMENT_CTOR_CALLBACK (Music_iterator);
178 Music_iterator::get_music () const
183 /****************************************************************/
185 IMPLEMENT_TYPE_P (Music_iterator, "ly:iterator?");
186 IMPLEMENT_SMOBS (Music_iterator);
187 IMPLEMENT_DEFAULT_EQUAL_P (Music_iterator);
190 Music_iterator::mark_smob (SCM smob)
192 Music_iterator * mus = (Music_iterator *)SCM_CELL_WORD_1 (smob);
194 mus->derived_mark ();
196 Careful with GC, although we intend the following as pointers
197 only, we _must_ mark them.
199 if (mus->get_outlet ())
200 scm_gc_mark (mus->get_outlet ()->self_scm ());
202 scm_gc_mark (mus->music_->self_scm ());
209 Music_iterator::print_smob (SCM sm , SCM port, scm_print_state*)
213 Music_iterator *iter = unsmob_iterator (sm);
214 sprintf (s, "#<%s>", classname (iter));
220 Music_iterator::derived_mark ()const
225 Music_iterator::quit ()
232 Music_iterator::do_quit ()
237 Music_iterator::run_always ()const
244 is_child_context (Context *me, Context *child)
246 while (child && child != me)
248 child = child->get_parent_context ();
255 move to context of child iterator if it is deeper down in the
259 Music_iterator::descend_to_child (Context * child_report)
261 Context * me_report = get_outlet ();
262 if (is_child_context (me_report, child_report))
263 set_context (child_report);