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/>.
25 #include "event-iterator.hh"
27 #include "international.hh"
28 #include "music-wrapper.hh"
29 #include "music-wrapper-iterator.hh"
30 #include "simple-music-iterator.hh"
33 Music_iterator::Music_iterator ()
39 Music_iterator::~Music_iterator ()
44 Music_iterator::get_outlet () const
46 return handle_.get_context ();
50 Music_iterator::set_context (Context *trans)
52 handle_.set_context (trans);
56 Music_iterator::construct_children ()
61 Music_iterator::pending_moment () const
67 Music_iterator::process (Moment)
72 Music_iterator::ok () const
78 Music_iterator::get_static_get_iterator (Music *m)
80 Music_iterator *p = 0;
82 SCM ctor = m->get_property ("iterator-ctor");
84 if (ly_is_procedure (ctor))
86 iter = scm_call_0 (ctor);
87 p = unsmob<Music_iterator> (iter);
91 if (dynamic_cast<Music_wrapper *> (m))
92 p = new Music_wrapper_iterator;
93 else if (m->is_mus_type ("event"))
94 p = new Event_iterator;
96 p = new Simple_music_iterator;
98 iter = p->self_scm ();
104 p->music_length_ = m->get_length ();
105 p->start_mom_ = m->start_mom ();
111 Music_iterator::music_get_length () const
113 return music_length_;
117 Music_iterator::music_start_mom ()const
123 Music_iterator::init_context (Music *m, Context *report)
128 set_context (report);
132 Music_iterator::substitute_outlet (Context *f, Context *t)
136 if (get_outlet () == f)
138 derived_substitute (f, t);
143 Music_iterator::derived_substitute (Context *, Context *)
148 Music_iterator::get_iterator (Music *m) const
150 SCM ip = get_static_get_iterator (m);
151 Music_iterator *p = unsmob<Music_iterator> (ip);
153 p->init_context (m, get_outlet ());
155 p->construct_children ();
159 /* Descend to a bottom context; implicitly create a new one if necessary */
161 Music_iterator::descend_to_bottom_context ()
163 assert (get_outlet ());
164 if (!get_outlet ()->is_bottom_context ())
165 set_context (get_outlet ()->get_default_interpreter ());
169 Music_iterator::report_event (Music *m)
171 descend_to_bottom_context ();
174 FIXME: then don't do it.
176 if (!m->is_mus_type ("event"))
177 m->origin ()->programming_error ("Sending non-event to context");
179 m->send_to_context (get_outlet ());
182 IMPLEMENT_CTOR_CALLBACK (Music_iterator);
185 Music_iterator::get_music () const
190 /****************************************************************/
192 const char Music_iterator::type_p_name_[] = "ly:iterator?";
195 Music_iterator::mark_smob () const
199 Careful with GC, although we intend the following as pointers
200 only, we _must_ mark them.
202 /* Use handle_ directly as get_outlet is a virtual function and we
203 need to protect the context until Music_iterator::quit is being
205 if (handle_.get_context ())
206 scm_gc_mark (handle_.get_context ()->self_scm ());
208 scm_gc_mark (music_->self_scm ());
214 Music_iterator::print_smob (SCM port, scm_print_state *) const
218 sprintf (s, "#<%s>", class_name ());
224 Music_iterator::derived_mark ()const
229 Music_iterator::quit ()
232 handle_.set_context (0);
236 Music_iterator::do_quit ()
241 Music_iterator::run_always ()const
247 is_child_context (Context *me, Context *child)
249 while (child && child != me)
250 child = child->get_parent_context ();
256 move to context of child iterator if it is deeper down in the
260 Music_iterator::descend_to_child (Context *child_report)
262 Context *me_report = get_outlet ();
263 if (is_child_context (me_report, child_report))
264 set_context (child_report);