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"
34 Global_context::pre_init ()
39 Global_context::Global_context (Output_def *o)
43 definition_ = find_context_def (o, ly_symbol2scm ("Global"));
45 now_mom_.set_infinite (-1);
46 prev_mom_.set_infinite (-1);
48 /* We only need the most basic stuff to bootstrap the context tree */
49 event_source ()->add_listener (GET_LISTENER (Context, create_context_from_event),
50 ly_symbol2scm ("CreateContext"));
51 event_source ()->add_listener (GET_LISTENER (Global_context, prepare),
52 ly_symbol2scm ("Prepare"));
53 events_below ()->register_as_listener (event_source_);
55 Context_def *globaldef = unsmob<Context_def> (definition_);
57 programming_error ("no `Global' context found");
59 globaldef->apply_default_property_operations (this);
61 default_child_ = ly_symbol2scm ("Score");
62 accepts_list_ = scm_list_1 (default_child_);
66 Global_context::derived_mark () const
69 scm_gc_mark (output_def_->self_scm ());
73 Global_context::get_output_def () const
79 Global_context::add_moment_to_process (Moment m)
82 programming_error ("trying to freeze in time");
84 for (vsize i = 0; i < extra_mom_pq_.size (); i++)
85 if (extra_mom_pq_[i] == m)
87 extra_mom_pq_.insert (m);
91 Global_context::sneaky_insert_extra_moment (Moment w)
93 while (extra_mom_pq_.size () && extra_mom_pq_.front () <= w)
94 w = extra_mom_pq_.get ();
99 Global_context::get_moments_left () const
101 return extra_mom_pq_.size ();
105 Global_context::prepare (SCM sev)
107 Stream_event *ev = unsmob<Stream_event> (sev);
108 Moment *mom = unsmob<Moment> (ev->get_property ("moment"));
112 if (prev_mom_.main_part_.is_infinity () && prev_mom_ < 0)
115 prev_mom_ = now_mom_;
120 Global_context::now_mom () const
126 Global_context::get_score_context () const
128 return (scm_is_pair (context_list_))
129 ? unsmob<Context> (scm_car (context_list_))
134 Global_context::get_output ()
136 Context *c = get_score_context ();
138 return c->get_property ("output");
144 Global_context::run_iterator_on_me (Music_iterator *iter)
146 prev_mom_.set_infinite (-1);
147 now_mom_.set_infinite (-1);
148 Moment final_mom = iter->get_music ()->get_length ();
151 while (iter->ok () || get_moments_left ())
156 w = iter->pending_moment ();
158 w = sneaky_insert_extra_moment (w);
159 if (w.main_part_.is_infinity () || w > final_mom)
164 programming_error ("Moment is not increasing."
165 " Aborting interpretation.");
172 Need this to get grace notes at start of a piece correct.
175 set_property ("measurePosition", w.smobbed_copy ());
178 send_stream_event (this, "Prepare", 0,
179 ly_symbol2scm ("moment"), w.smobbed_copy ());
184 send_stream_event (this, "OneTimeStep", 0, 0);
185 apply_finalizations ();
191 Global_context::apply_finalizations ()
193 SCM lst = get_property ("finalizations");
194 set_property ("finalizations", SCM_EOL);
195 for (SCM s = lst; scm_is_pair (s); s = scm_cdr (s))
196 scm_apply_0 (scm_caar (s), scm_cdar (s));
199 /* Add a function to execute before stepping to the next time step. */
201 Global_context::add_finalization (SCM x)
203 SCM lst = get_property ("finalizations");
204 lst = scm_cons (x, lst);
205 set_property ("finalizations", lst);
209 Global_context::previous_moment () const
215 Global_context::get_default_interpreter (const string &/* context_id */)
217 if (get_score_context ())
218 return get_score_context ()->get_default_interpreter ();
220 return Context::get_default_interpreter ();