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"
35 Global_context::Global_context (Output_def *o)
39 definition_ = find_context_def (o, ly_symbol2scm ("Global"));
41 now_mom_.set_infinite (-1);
42 prev_mom_.set_infinite (-1);
44 /* We only need the most basic stuff to bootstrap the context tree */
45 event_source ()->add_listener (GET_LISTENER (Context, create_context_from_event),
46 ly_symbol2scm ("CreateContext"));
47 event_source ()->add_listener (GET_LISTENER (Global_context, prepare),
48 ly_symbol2scm ("Prepare"));
49 events_below ()->register_as_listener (event_source_);
51 Context_def *globaldef = unsmob<Context_def> (definition_);
53 programming_error ("no `Global' context found");
55 globaldef->apply_default_property_operations (this);
57 default_child_ = ly_symbol2scm ("Score");
58 accepts_list_ = scm_list_1 (default_child_);
62 Global_context::get_output_def () const
68 Global_context::add_moment_to_process (Moment m)
71 programming_error ("trying to freeze in time");
73 for (vsize i = 0; i < extra_mom_pq_.size (); i++)
74 if (extra_mom_pq_[i] == m)
76 extra_mom_pq_.insert (m);
80 Global_context::sneaky_insert_extra_moment (Moment w)
82 while (extra_mom_pq_.size () && extra_mom_pq_.front () <= w)
83 w = extra_mom_pq_.get ();
88 Global_context::get_moments_left () const
90 return extra_mom_pq_.size ();
94 Global_context::prepare (SCM sev)
96 Stream_event *ev = unsmob<Stream_event> (sev);
97 Moment *mom = unsmob<Moment> (ev->get_property ("moment"));
101 if (prev_mom_.main_part_.is_infinity () && prev_mom_ < 0)
104 prev_mom_ = now_mom_;
109 Global_context::now_mom () const
115 Global_context::get_score_context () const
117 return (scm_is_pair (context_list_))
118 ? unsmob<Context> (scm_car (context_list_))
123 Global_context::get_output ()
125 Context *c = get_score_context ();
127 return c->get_property ("output");
133 Global_context::run_iterator_on_me (Music_iterator *iter)
135 prev_mom_.set_infinite (-1);
136 now_mom_.set_infinite (-1);
137 Moment final_mom = iter->get_music ()->get_length ();
140 while (iter->ok () || get_moments_left ())
145 w = iter->pending_moment ();
147 w = sneaky_insert_extra_moment (w);
148 if (w.main_part_.is_infinity () || w > final_mom)
153 programming_error ("Moment is not increasing."
154 " Aborting interpretation.");
161 Need this to get grace notes at start of a piece correct.
164 set_property ("measurePosition", w.smobbed_copy ());
167 send_stream_event (this, "Prepare", 0,
168 ly_symbol2scm ("moment"), w.smobbed_copy ());
173 send_stream_event (this, "OneTimeStep", 0, 0);
174 apply_finalizations ();
180 Global_context::apply_finalizations ()
182 SCM lst = get_property ("finalizations");
183 set_property ("finalizations", SCM_EOL);
184 for (SCM s = lst; scm_is_pair (s); s = scm_cdr (s))
185 scm_apply_0 (scm_caar (s), scm_cdar (s));
188 /* Add a function to execute before stepping to the next time step. */
190 Global_context::add_finalization (SCM x)
192 SCM lst = get_property ("finalizations");
193 lst = scm_cons (x, lst);
194 set_property ("finalizations", lst);
198 Global_context::previous_moment () const
204 Global_context::get_default_interpreter (const string &/* context_id */)
206 if (get_score_context ())
207 return get_score_context ()->get_default_interpreter ();
209 return Context::get_default_interpreter ();