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/>.
20 #include "global-context.hh"
25 #include "context-def.hh"
26 #include "dispatcher.hh"
27 #include "international.hh"
28 #include "music-iterator.hh"
30 #include "output-def.hh"
33 Preinit_Global_context::Preinit_Global_context ()
38 Global_context::Global_context (Output_def *o)
42 definition_ = find_context_def (o, ly_symbol2scm ("Global"));
44 now_mom_.set_infinite (-1);
45 prev_mom_.set_infinite (-1);
47 /* We only need the most basic stuff to bootstrap the context tree */
48 event_source ()->add_listener (GET_LISTENER (Context, create_context_from_event),
49 ly_symbol2scm ("CreateContext"));
50 event_source ()->add_listener (GET_LISTENER (Global_context, prepare),
51 ly_symbol2scm ("Prepare"));
52 events_below ()->register_as_listener (event_source_);
54 Context_def *globaldef = unsmob<Context_def> (definition_);
56 programming_error ("no `Global' context found");
58 globaldef->apply_default_property_operations (this);
60 default_child_ = ly_symbol2scm ("Score");
61 accepts_list_ = scm_list_1 (default_child_);
65 Global_context::derived_mark () const
68 scm_gc_mark (output_def_->self_scm ());
72 Global_context::get_output_def () const
78 Global_context::add_moment_to_process (Moment m)
81 programming_error ("trying to freeze in time");
83 for (vsize i = 0; i < extra_mom_pq_.size (); i++)
84 if (extra_mom_pq_[i] == m)
86 extra_mom_pq_.insert (m);
90 Global_context::sneaky_insert_extra_moment (Moment w)
92 while (extra_mom_pq_.size () && extra_mom_pq_.front () <= w)
93 w = extra_mom_pq_.get ();
98 Global_context::get_moments_left () const
100 return extra_mom_pq_.size ();
104 Global_context::prepare (SCM sev)
106 Stream_event *ev = unsmob<Stream_event> (sev);
107 Moment *mom = unsmob<Moment> (ev->get_property ("moment"));
111 if (prev_mom_.main_part_.is_infinity () && prev_mom_ < 0)
114 prev_mom_ = now_mom_;
119 Global_context::now_mom () const
125 Global_context::get_score_context () const
127 return (scm_is_pair (context_list_))
128 ? unsmob<Context> (scm_car (context_list_))
133 Global_context::get_output ()
135 Context *c = get_score_context ();
137 return c->get_property ("output");
143 Global_context::run_iterator_on_me (Music_iterator *iter)
145 prev_mom_.set_infinite (-1);
146 now_mom_.set_infinite (-1);
147 Moment final_mom = iter->get_music ()->get_length ();
150 while (iter->ok () || get_moments_left ())
155 w = iter->pending_moment ();
157 w = sneaky_insert_extra_moment (w);
158 if (w.main_part_.is_infinity () || w > final_mom)
163 programming_error ("Moment is not increasing."
164 " Aborting interpretation.");
171 Need this to get grace notes at start of a piece correct.
174 set_property ("measurePosition", w.smobbed_copy ());
177 send_stream_event (this, "Prepare", 0,
178 ly_symbol2scm ("moment"), w.smobbed_copy ());
183 send_stream_event (this, "OneTimeStep", 0);
184 apply_finalizations ();
190 Global_context::apply_finalizations ()
192 SCM lst = get_property ("finalizations");
193 set_property ("finalizations", SCM_EOL);
194 for (SCM s = lst; scm_is_pair (s); s = scm_cdr (s))
195 scm_apply_0 (scm_caar (s), scm_cdar (s));
198 /* Add a function to execute before stepping to the next time step. */
200 Global_context::add_finalization (SCM x)
202 SCM lst = get_property ("finalizations");
203 lst = scm_cons (x, lst);
204 set_property ("finalizations", lst);
208 Global_context::previous_moment () const
214 Global_context::get_default_interpreter (const string &/* context_id */)
216 if (get_score_context ())
217 return get_score_context ()->get_default_interpreter ();
219 return Context::get_default_interpreter ();