2 global-context.cc -- implement Global_context
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "global-context.hh"
15 #include "music-iterator.hh"
16 #include "score-context.hh"
17 #include "context-def.hh"
18 #include "output-def.hh"
19 #include "lilypond-key.hh"
21 Global_context::Global_context (Output_def *o, Moment final, Object_key *key)
22 : Context (new Lilypond_context_key (key,
28 definition_ = find_context_def (o, ly_symbol2scm ("Global"));
30 Context_def *globaldef = unsmob_context_def (definition_);
33 programming_error ("No `Global' context found.");
36 globaldef->apply_default_property_operations (this);
37 accepts_list_ = scm_list_1 (ly_symbol2scm ("Score"));
41 Global_context::get_output_def () const
47 Global_context::add_moment_to_process (Moment m)
53 programming_error ("Trying to freeze in time.");
55 for (int i = 0; i < extra_mom_pq_.size (); i++)
56 if (extra_mom_pq_[i] == m)
58 extra_mom_pq_.insert (m);
62 Global_context::sneaky_insert_extra_moment (Moment w)
64 while (extra_mom_pq_.size () && extra_mom_pq_.front () <= w)
65 w = extra_mom_pq_.get ();
70 Global_context::get_moments_left () const
72 return extra_mom_pq_.size ();
76 Global_context::prepare (Moment m)
81 clear_key_disambiguations ();
82 if (get_score_context ())
83 get_score_context ()->prepare (m);
87 Global_context::now_mom () const
93 Global_context::get_score_context () const
95 return (scm_is_pair (context_list_))
96 ? dynamic_cast<Score_context *> (unsmob_context (scm_car (context_list_)))
101 Global_context::get_output ()
103 return get_score_context ()->get_output ();
107 Global_context::one_time_step ()
109 get_score_context ()->one_time_step ();
110 apply_finalizations ();
115 Global_context::finish ()
117 if (get_score_context ())
118 get_score_context ()->finish ();
122 Global_context::run_iterator_on_me (Music_iterator *iter)
125 prev_mom_ = now_mom_ = iter->pending_moment ();
128 while (iter->ok () || get_moments_left ())
134 w = iter->pending_moment ();
137 w = sneaky_insert_extra_moment (w);
138 if (w.main_part_.is_infinity ())
144 Need this to get grace notes at start of a piece correct.
147 set_property ("measurePosition", w.smobbed_copy ());
155 if (!get_score_context ())
157 SCM sym = ly_symbol2scm ("Score");
158 Context_def *t = unsmob_context_def (find_context_def (get_output_def (), sym));
160 error (_f ("can't find `%s' context", "Score"));
162 Object_key const *key = get_context_key ("Score", "");
163 Context *c = t->instantiate (SCM_EOL, key);
166 Score_context *sc = dynamic_cast<Score_context *> (c);
175 Global_context::apply_finalizations ()
177 SCM lst = get_property ("finalizations");
178 set_property ("finalizations", SCM_EOL);
179 for (SCM s = lst; scm_is_pair (s); s = scm_cdr (s))
180 /* TODO: make safe. */
181 scm_primitive_eval (scm_car (s));
184 /* Add a function to execute before stepping to the next time step. */
186 Global_context::add_finalization (SCM x)
188 SCM lst = get_property ("finalizations");
189 lst = scm_cons (x, lst);
190 set_property ("finalizations", lst);
194 Global_context::previous_moment () const
200 Global_context::get_default_interpreter ()
202 if (get_score_context ())
203 return get_score_context ()->get_default_interpreter ();
205 return Context::get_default_interpreter ();