2 music-iterator.cc -- implement Music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 UGH. too many includes.
15 #include "music-iterator.hh"
17 #include "music-wrapper.hh"
18 #include "music-wrapper-iterator.hh"
19 #include "simple-music-iterator.hh"
21 #include "ly-smobs.icc"
23 Music_iterator::Music_iterator ()
29 Music_iterator::Music_iterator (Music_iterator const& )
34 Music_iterator::~Music_iterator ()
39 Music_iterator::get_outlet () const
41 return handle_.get_outlet ();
45 Music_iterator::set_translator (Context *trans)
47 handle_.set_translator (trans);
51 Music_iterator::construct_children ()
56 Music_iterator::pending_moment () const
62 Music_iterator::process (Moment)
67 Music_iterator::ok () const
75 Music_iterator::get_static_get_iterator (Music *m)
77 Music_iterator * p =0;
79 SCM ctor = m->get_property ("iterator-ctor") ;
81 if (ly_c_procedure_p (ctor))
83 iter = scm_call_0 (ctor);
84 p = unsmob_iterator (iter);
88 if (dynamic_cast<Music_wrapper *> (m))
89 p = new Music_wrapper_iterator;
91 p = new Simple_music_iterator;
93 iter = p->self_scm ();
94 scm_gc_unprotect_object (iter);
99 p->music_length_ = m->get_length ();
100 p->start_mom_ = m->start_mom ();
107 Music_iterator::music_get_length () const
109 return music_length_;
113 Music_iterator::music_start_mom ()const
119 Music_iterator::init_translator (Music *m, Context *report)
124 set_translator (report);
128 Music_iterator::substitute_outlet (Context *f, Context *t)
130 if (get_outlet () == f)
132 derived_substitute (f,t);
136 Music_iterator::derived_substitute (Context *,Context *)
141 Music_iterator::get_iterator (Music *m) const
143 SCM ip = get_static_get_iterator (m);
144 Music_iterator*p = unsmob_iterator (ip);
146 p->init_translator (m, get_outlet ());
148 p->construct_children ();
153 TODO: rename to prevent confusion between Context::try_music and
158 Music_iterator::try_music (Music *m) const
160 bool b = get_outlet ()->try_music ((Music*)m); // ugh
161 Music_iterator * it = b ? (Music_iterator*) this : 0; // ugh
163 it = try_music_in_children (m);
168 Music_iterator::try_music_in_children (Music *) const
173 IMPLEMENT_CTOR_CALLBACK (Music_iterator);
176 Music_iterator::get_music () const
181 /****************************************************************/
183 IMPLEMENT_TYPE_P (Music_iterator, "ly:iterator?");
184 IMPLEMENT_SMOBS (Music_iterator);
185 IMPLEMENT_DEFAULT_EQUAL_P (Music_iterator);
188 Music_iterator::mark_smob (SCM smob)
190 Music_iterator * mus = (Music_iterator *)SCM_CELL_WORD_1 (smob);
192 mus->derived_mark ();
194 Careful with GC, although we intend the following as pointers
195 only, we _must_ mark them.
197 if (mus->get_outlet ())
198 scm_gc_mark (mus->get_outlet ()->self_scm ());
200 scm_gc_mark (mus->music_->self_scm ());
207 Music_iterator::print_smob (SCM sm , SCM port, scm_print_state*)
211 Music_iterator *iter = unsmob_iterator (sm);
212 sprintf (s, "#<%s>", classname (iter));
218 Music_iterator::derived_mark ()const
223 Music_iterator::quit ()
230 Music_iterator::do_quit ()
235 Music_iterator::run_always ()const
242 is_child_context (Context *me, Context *child)
244 while (child && child != me)
246 child = child->get_parent_context ();
253 move to context of child iterator if it is deeper down in the
257 Music_iterator::descend_to_child (Context * child_report)
259 Context * me_report = get_outlet ();
260 if (is_child_context (me_report, child_report))
261 set_translator (child_report);