2 music-iterator.cc -- implement Music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #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_context (Context *trans)
47 handle_.set_context (trans);
51 Music_iterator::construct_children ()
56 Music_iterator::pending_moment () const
62 Music_iterator::process (Moment)
67 Music_iterator::ok () const
73 Music_iterator::get_static_get_iterator (Music *m)
75 Music_iterator *p = 0;
77 SCM ctor = m->get_property ("iterator-ctor");
79 if (ly_is_procedure (ctor))
81 iter = scm_call_0 (ctor);
82 p = unsmob_iterator (iter);
86 if (dynamic_cast<Music_wrapper *> (m))
87 p = new Music_wrapper_iterator;
89 p = new Simple_music_iterator;
91 iter = p->self_scm ();
97 p->music_length_ = m->get_length ();
98 p->start_mom_ = m->start_mom ();
104 Music_iterator::music_get_length () const
106 return music_length_;
110 Music_iterator::music_start_mom ()const
116 Music_iterator::init_translator (Music *m, Context *report)
121 set_context (report);
125 Music_iterator::substitute_outlet (Context *f, Context *t)
127 if (get_outlet () == f)
129 derived_substitute (f, t);
133 Music_iterator::derived_substitute (Context *, Context *)
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, get_outlet ());
145 p->construct_children ();
150 TODO: rename to prevent confusion between Context::try_music and
154 Music_iterator::try_music (Music *m) const
156 bool b = get_outlet ()->try_music ((Music *)m); // ugh
157 Music_iterator *it = b ? (Music_iterator *) this : 0; // ugh
159 it = try_music_in_children (m);
164 Music_iterator::try_music_in_children (Music *) const
169 IMPLEMENT_CTOR_CALLBACK (Music_iterator);
172 Music_iterator::get_music () const
177 /****************************************************************/
179 IMPLEMENT_TYPE_P (Music_iterator, "ly:iterator?");
180 IMPLEMENT_SMOBS (Music_iterator);
181 IMPLEMENT_DEFAULT_EQUAL_P (Music_iterator);
184 Music_iterator::mark_smob (SCM smob)
186 Music_iterator *mus = (Music_iterator *)SCM_CELL_WORD_1 (smob);
188 mus->derived_mark ();
190 Careful with GC, although we intend the following as pointers
191 only, we _must_ mark them.
193 if (mus->get_outlet ())
194 scm_gc_mark (mus->get_outlet ()->self_scm ());
196 scm_gc_mark (mus->music_->self_scm ());
202 Music_iterator::print_smob (SCM sm, SCM port, scm_print_state*)
206 Music_iterator *iter = unsmob_iterator (sm);
207 sprintf (s, "#<%s>", iter->class_name ());
213 Music_iterator::derived_mark ()const
218 Music_iterator::quit ()
221 handle_.set_context (0);
225 Music_iterator::do_quit ()
230 Music_iterator::run_always ()const
236 is_child_context (Context *me, Context *child)
238 while (child && child != me)
239 child = child->get_parent_context ();
245 move to context of child iterator if it is deeper down in the
249 Music_iterator::descend_to_child (Context *child_report)
251 Context *me_report = get_outlet ();
252 if (is_child_context (me_report, child_report))
253 set_context (child_report);