2 global-translator.cc -- implement global_context
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
13 #include "music-list.hh"
14 #include "music-iterator.hh"
15 #include "global-context.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,
26 scm_gc_unprotect_object (key_->self_scm());
30 definition_ = find_context_def (o, ly_symbol2scm ("Global"));
32 Context_def *globaldef = unsmob_context_def (definition_);
35 programming_error ("No `Global' context found.");
38 globaldef->apply_default_property_operations (this);
39 accepts_list_ = scm_list_1 (ly_symbol2scm ("Score"));
43 Global_context::get_output_def () const
49 Global_context::add_moment_to_process (Moment m)
55 programming_error ("Trying to freeze in time.");
57 for (int i=0; i < extra_mom_pq_.size (); i++)
58 if (extra_mom_pq_[i] == m)
60 extra_mom_pq_.insert (m);
64 Global_context::sneaky_insert_extra_moment (Moment w)
66 while (extra_mom_pq_.size () && extra_mom_pq_.front () <= w)
67 w = extra_mom_pq_.get ();
72 Global_context::get_moments_left () const
74 return extra_mom_pq_.size ();
78 Global_context::prepare (Moment m)
83 clear_key_disambiguations ();
84 if (get_score_context ())
85 get_score_context ()->prepare (m);
90 Global_context::now_mom () const
96 Global_context::get_score_context () const
98 return (scm_is_pair (context_list_))
99 ? dynamic_cast<Score_context*> (unsmob_context (scm_car (context_list_)))
104 Global_context::get_output ()
106 return get_score_context ()->get_output ();
110 Global_context::one_time_step ()
112 get_score_context ()->one_time_step ();
113 apply_finalizations ();
118 Global_context::finish ()
120 if (get_score_context ())
121 get_score_context ()->finish ();
125 Global_context::run_iterator_on_me (Music_iterator * iter)
128 prev_mom_ = now_mom_ = iter->pending_moment ();
131 while (iter->ok () || get_moments_left ())
137 w = iter->pending_moment ();
140 w = sneaky_insert_extra_moment (w);
141 if (w.main_part_.is_infinity ())
147 Need this to get grace notes at start of a piece correct.
150 set_property ("measurePosition", w.smobbed_copy ());
159 if (!get_score_context ())
161 SCM sym = ly_symbol2scm ("Score");
162 Context_def * t = unsmob_context_def (find_context_def (get_output_def (), sym));
164 error (_f ("can't find `%s' context", "Score"));
166 Object_key const *key = get_context_key ("Score", "");
167 Context *c = t->instantiate (SCM_EOL, key);
169 scm_gc_unprotect_object (key->self_scm());
171 Score_context *sc = dynamic_cast<Score_context*> (c);
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 /* TODO: make safe. */
186 scm_primitive_eval (scm_car (s));
189 /* Add a function to execute before stepping to the next time step. */
191 Global_context::add_finalization (SCM x)
193 SCM lst = get_property ("finalizations");
194 lst = scm_cons (x, lst);
195 set_property ("finalizations", lst);
199 Global_context::previous_moment () const
205 Global_context::get_default_interpreter ()
207 if (get_score_context ())
208 return get_score_context ()->get_default_interpreter ();
210 return Context::get_default_interpreter ();