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
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_is_procedure (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 ();
99 p->music_length_ = m->get_length ();
100 p->start_mom_ = m->start_mom ();
106 Music_iterator::music_get_length () const
108 return music_length_;
112 Music_iterator::music_start_mom ()const
118 Music_iterator::init_translator (Music *m, Context *report)
123 set_context (report);
127 Music_iterator::substitute_outlet (Context *f, Context *t)
129 if (get_outlet () == f)
131 derived_substitute (f, t);
135 Music_iterator::derived_substitute (Context *, Context *)
140 Music_iterator::get_iterator (Music *m) const
142 SCM ip = get_static_get_iterator (m);
143 Music_iterator *p = unsmob_iterator (ip);
145 p->init_translator (m, get_outlet ());
147 p->construct_children ();
152 TODO: rename to prevent confusion between Context::try_music and
156 Music_iterator::try_music (Music *m) const
158 bool b = get_outlet ()->try_music ((Music *)m); // ugh
159 Music_iterator *it = b ? (Music_iterator *) this : 0; // ugh
161 it = try_music_in_children (m);
166 Music_iterator::try_music_in_children (Music *) const
171 IMPLEMENT_CTOR_CALLBACK (Music_iterator);
174 Music_iterator::get_music () const
179 /****************************************************************/
181 IMPLEMENT_TYPE_P (Music_iterator, "ly:iterator?");
182 IMPLEMENT_SMOBS (Music_iterator);
183 IMPLEMENT_DEFAULT_EQUAL_P (Music_iterator);
186 Music_iterator::mark_smob (SCM smob)
188 Music_iterator *mus = (Music_iterator *)SCM_CELL_WORD_1 (smob);
190 mus->derived_mark ();
192 Careful with GC, although we intend the following as pointers
193 only, we _must_ mark them.
195 if (mus->get_outlet ())
196 scm_gc_mark (mus->get_outlet ()->self_scm ());
198 scm_gc_mark (mus->music_->self_scm ());
204 Music_iterator::print_smob (SCM sm, SCM port, scm_print_state*)
208 Music_iterator *iter = unsmob_iterator (sm);
209 sprintf (s, "#<%s>", classname (iter));
215 Music_iterator::derived_mark ()const
220 Music_iterator::quit ()
223 handle_.set_context (0);
227 Music_iterator::do_quit ()
232 Music_iterator::run_always ()const
238 is_child_context (Context *me, Context *child)
240 while (child && child != me)
241 child = child->get_parent_context ();
247 move to context of child iterator if it is deeper down in the
251 Music_iterator::descend_to_child (Context *child_report)
253 Context *me_report = get_outlet ();
254 if (is_child_context (me_report, child_report))
255 set_context (child_report);