2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
26 #include "event-iterator.hh"
28 #include "international.hh"
29 #include "music-wrapper.hh"
30 #include "music-wrapper-iterator.hh"
31 #include "simple-music-iterator.hh"
33 ADD_SMOB_INIT (Music_iterator);
35 Music_iterator::Music_iterator ()
41 Music_iterator::~Music_iterator ()
46 Music_iterator::get_outlet () const
48 return handle_.get_context ();
52 Music_iterator::set_context (Context *trans)
54 handle_.set_context (trans);
58 Music_iterator::construct_children ()
63 Music_iterator::pending_moment () const
69 Music_iterator::process (Moment)
74 Music_iterator::ok () const
80 Music_iterator::get_static_get_iterator (Music *m)
82 Music_iterator *p = 0;
84 SCM ctor = m->get_property ("iterator-ctor");
86 if (ly_is_procedure (ctor))
88 iter = scm_call_0 (ctor);
89 p = Music_iterator::unsmob (iter);
93 if (dynamic_cast<Music_wrapper *> (m))
94 p = new Music_wrapper_iterator;
95 else if (m->is_mus_type ("event"))
96 p = new Event_iterator;
98 p = new Simple_music_iterator;
100 iter = p->self_scm ();
106 p->music_length_ = m->get_length ();
107 p->start_mom_ = m->start_mom ();
113 Music_iterator::music_get_length () const
115 return music_length_;
119 Music_iterator::music_start_mom ()const
125 Music_iterator::init_context (Music *m, Context *report)
130 set_context (report);
134 Music_iterator::substitute_outlet (Context *f, Context *t)
136 if (get_outlet () == f)
138 derived_substitute (f, t);
142 Music_iterator::derived_substitute (Context *, Context *)
147 Music_iterator::get_iterator (Music *m) const
149 SCM ip = get_static_get_iterator (m);
150 Music_iterator *p = Music_iterator::unsmob (ip);
152 p->init_context (m, get_outlet ());
154 p->construct_children ();
158 /* Descend to a bottom context; implicitly create a new one if necessary */
160 Music_iterator::descend_to_bottom_context ()
162 assert (get_outlet ());
163 if (!get_outlet ()->is_bottom_context ())
164 set_context (get_outlet ()->get_default_interpreter ());
168 Music_iterator::report_event (Music *m)
170 descend_to_bottom_context ();
173 FIXME: then don't do it.
175 if (!m->is_mus_type ("event"))
176 m->origin ()->programming_error ("Sending non-event to context");
178 m->send_to_context (get_outlet ());
181 IMPLEMENT_CTOR_CALLBACK (Music_iterator);
184 Music_iterator::get_music () const
189 /****************************************************************/
191 const char Music_iterator::type_p_name_[] = "ly:iterator?";
194 Music_iterator::mark_smob ()
198 Careful with GC, although we intend the following as pointers
199 only, we _must_ mark them.
201 /* Use handle_ directly as get_outlet is a virtual function and we
202 need to protect the context until Music_iterator::quit is being
204 if (handle_.get_context ())
205 scm_gc_mark (handle_.get_context ()->self_scm ());
207 scm_gc_mark (music_->self_scm ());
213 Music_iterator::print_smob (SCM port, scm_print_state *)
217 sprintf (s, "#<%s>", class_name ());
223 Music_iterator::derived_mark ()const
228 Music_iterator::quit ()
231 handle_.set_context (0);
235 Music_iterator::do_quit ()
240 Music_iterator::run_always ()const
246 is_child_context (Context *me, Context *child)
248 while (child && child != me)
249 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);