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 "translator.hh"
22 #include "context-def.hh"
23 #include "dispatcher.hh"
24 #include "global-context.hh"
25 #include "international.hh"
26 #include "translator-group.hh"
29 #include "translator.icc"
31 ADD_SMOB_INIT (Translator);
33 Translator::~Translator ()
45 Translator::process_music ()
50 Translator::process_acknowledged ()
54 Translator::Translator ()
59 Translator::Translator (Translator const &)
66 Translator::now_mom () const
68 return daddy_context_->now_mom ();
72 Translator::get_output_def () const
74 return daddy_context_->get_output_def ();
78 Translator::get_daddy_translator () const
80 return daddy_context_->implementation ();
84 Translator::protect_event (SCM ev)
86 get_daddy_translator ()->protect_event (ev);
90 Translator::internal_get_property (SCM sym) const
92 return daddy_context_->internal_get_property (sym);
96 Translator::stop_translation_timestep ()
101 this function is called once each moment, before any user
102 information enters the translators. (i.e. no \property or event has
106 Translator::start_translation_timestep ()
111 Translator::initialize ()
116 Translator::finalize ()
121 Translator::connect_to_context (Context *c)
123 for (translator_listener_record *r = get_listener_list (); r; r = r->next_)
124 c->events_below ()->add_listener (r->get_listener_ (this, r->event_class_),
129 Translator::disconnect_from_context (Context *c)
131 for (translator_listener_record *r = get_listener_list (); r; r = r->next_)
132 c->events_below ()->remove_listener (r->get_listener_ (this, r->event_class_),
137 internally called once, statically, for each translator
138 listener. Connects the name of an event class with a procedure that
139 fetches the corresponding listener.
141 The method should only be called from the macro
142 IMPLEMENT_TRANSLATOR_LISTENER.
145 Translator::add_translator_listener (translator_listener_record **listener_list,
146 translator_listener_record *r,
147 Listener (*get_listener) (void *, SCM),
148 const char *ev_class)
150 /* ev_class is the C++ identifier name. Convert to scm symbol */
151 string name = string (ev_class);
152 name = replace_all (&name, '_', '-');
155 // we make the symbol permanent in order not to have to bother about
156 // the static translator_listener_record chains while garbage
159 SCM class_sym = scm_permanent_object (scm_from_ascii_symbol (name.c_str ()));
161 r->event_class_ = class_sym;
162 r->get_listener_ = get_listener;
163 r->next_ = *listener_list;
168 Helps the individual static_translator_description methods of translators.
171 Translator::static_translator_description (const char *grobs,
173 translator_listener_record *listener_list,
175 const char *write) const
177 SCM static_properties = SCM_EOL;
179 static_properties = scm_acons (ly_symbol2scm ("grobs-created"),
180 parse_symbol_list (grobs), static_properties);
182 static_properties = scm_acons (ly_symbol2scm ("description"),
183 scm_from_utf8_string (desc), static_properties);
186 for (; listener_list; listener_list = listener_list->next_)
187 list = scm_cons (listener_list->event_class_, list);
188 static_properties = scm_acons (ly_symbol2scm ("events-accepted"),
189 list, static_properties);
191 static_properties = scm_acons (ly_symbol2scm ("properties-read"),
192 parse_symbol_list (read), static_properties);
194 static_properties = scm_acons (ly_symbol2scm ("properties-written"),
195 parse_symbol_list (write), static_properties);
197 return static_properties;
204 Translator::mark_smob ()
211 Translator::get_global_context () const
213 return daddy_context_->get_global_context ();
217 Translator::get_score_context () const
219 return daddy_context_->get_score_context ();
222 const char Translator::type_p_name_[] = "ly:translator?";
225 Translator::must_be_last () const
231 Translator::derived_mark () const
236 Translator::print_smob (SCM port, scm_print_state *)
238 scm_puts ("#<Translator ", port);
239 scm_puts (class_name (), port);
240 scm_puts (" >", port);
245 add_acknowledger (Translator::Grob_info_callback ptr,
246 char const *func_name,
247 vector<Acknowledge_information> *ack_array)
249 Acknowledge_information inf;
252 string interface_name (func_name);
254 interface_name = replace_all (&interface_name, '_', '-');
255 interface_name += "-interface";
258 this is only called during program init, so safe to use scm_gc_protect_object ()
260 inf.symbol_ = scm_gc_protect_object (ly_symbol2scm (interface_name.c_str ()));
261 ack_array->push_back (inf);
264 Translator::Grob_info_callback
265 generic_get_acknowledger (SCM sym, vector<Acknowledge_information> const *ack_array)
267 for (vsize i = 0; i < ack_array->size (); i++)
269 if (ack_array->at (i).symbol_ == sym)
270 return ack_array->at (i).function_;
276 get_event_length (Stream_event *e)
278 Moment *m = Moment::unsmob (e->get_property ("length"));
286 get_event_length (Stream_event *e, Moment now)
288 Moment len = get_event_length (e);
292 len.grace_part_ = len.main_part_;
293 len.main_part_ = Rational (0);
299 Helper, used through ASSIGN_EVENT_ONCE to throw warnings for
300 simultaneous events. The helper is only useful in listen_* methods
304 internal_event_assignment (Stream_event **old_ev, Stream_event *new_ev, const char *function)
307 && !to_boolean (scm_equal_p ((*old_ev)->self_scm (),
308 new_ev->self_scm ())))
310 /* extract event class from function name */
311 string ev_class = function;
313 /* This assertion fails if EVENT_ASSIGNMENT was called outside a
314 translator listener. Don't do that. */
315 const char *prefix = "listen_";
316 assert (0 == ev_class.find (prefix));
318 /* "listen_foo_bar" -> "foo-bar" */
319 ev_class.erase (0, strlen (prefix));
320 replace_all (&ev_class, '_', '-');
322 new_ev->origin ()->warning (_f ("Two simultaneous %s events, junking this one", ev_class.c_str ()));
323 (*old_ev)->origin ()->warning (_f ("Previous %s event here", ev_class.c_str ()));
333 ADD_TRANSLATOR (Translator,
335 "Base class. Not instantiated.",