2 music-iterator.cc -- implement Music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 UGH. too many includes.
13 #include "music-iterator.hh"
20 #include "music-wrapper.hh"
21 #include "music-wrapper-iterator.hh"
22 #include "simple-music-iterator.hh"
24 #include "ly-smobs.icc"
26 Music_iterator::Music_iterator ()
32 Music_iterator::Music_iterator (Music_iterator const &)
37 Music_iterator::~Music_iterator ()
42 Music_iterator::get_outlet () const
44 return handle_.get_outlet ();
48 Music_iterator::set_context (Context *trans)
50 handle_.set_context (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::get_static_get_iterator (Music *m)
78 Music_iterator *p = 0;
80 SCM ctor = m->get_property ("iterator-ctor");
82 if (ly_is_procedure (ctor))
84 iter = scm_call_0 (ctor);
85 p = unsmob_iterator (iter);
89 if (dynamic_cast<Music_wrapper *> (m))
90 p = new Music_wrapper_iterator;
92 p = new Simple_music_iterator;
94 iter = p->self_scm ();
100 p->music_length_ = m->get_length ();
101 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_context (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
157 Music_iterator::try_music (Music *m) const
159 bool b = get_outlet ()->try_music ((Music *)m); // ugh
160 Music_iterator *it = b ? (Music_iterator *) this : 0; // ugh
162 it = try_music_in_children (m);
167 Music_iterator::try_music_in_children (Music *) const
172 IMPLEMENT_CTOR_CALLBACK (Music_iterator);
175 Music_iterator::get_music () const
180 /****************************************************************/
182 IMPLEMENT_TYPE_P (Music_iterator, "ly:iterator?");
183 IMPLEMENT_SMOBS (Music_iterator);
184 IMPLEMENT_DEFAULT_EQUAL_P (Music_iterator);
187 Music_iterator::mark_smob (SCM smob)
189 Music_iterator *mus = (Music_iterator *)SCM_CELL_WORD_1 (smob);
191 mus->derived_mark ();
193 Careful with GC, although we intend the following as pointers
194 only, we _must_ mark them.
196 if (mus->get_outlet ())
197 scm_gc_mark (mus->get_outlet ()->self_scm ());
199 scm_gc_mark (mus->music_->self_scm ());
205 Music_iterator::print_smob (SCM sm, SCM port, scm_print_state*)
209 Music_iterator *iter = unsmob_iterator (sm);
210 sprintf (s, "#<%s>", iter->class_name ());
216 Music_iterator::derived_mark ()const
221 Music_iterator::quit ()
224 handle_.set_context (0);
228 Music_iterator::do_quit ()
233 Music_iterator::run_always ()const
239 is_child_context (Context *me, Context *child)
241 while (child && child != me)
242 child = child->get_parent_context ();
248 move to context of child iterator if it is deeper down in the
252 Music_iterator::descend_to_child (Context *child_report)
254 Context *me_report = get_outlet ();
255 if (is_child_context (me_report, child_report))
256 set_context (child_report);