/*
- translator.cc -- implement Translator
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-*/
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
#include "translator.hh"
-#include "warn.hh"
-#include "translator-group.hh"
-#include "translator-def.hh"
-#include "moment.hh"
-#include "ly-smobs.icc"
+#include "context-def.hh"
+#include "dispatcher.hh"
+#include "global-context.hh"
+#include "international.hh"
+#include "translator-group.hh"
+#include "warn.hh"
+#include "translator.icc"
Translator::~Translator ()
{
}
void
-Translator::init ()
+Translator::process_music ()
{
- simple_trans_list_ = SCM_BOOL_F;
- trans_group_list_ = SCM_EOL;
- properties_scm_ = SCM_EOL;
- definition_ = SCM_EOL;
- daddy_trans_ =0;
- accepts_list_ = SCM_EOL;
}
-Translator::Translator ()
+void
+Translator::process_acknowledged ()
{
- self_scm_ = SCM_EOL;
- init ();
- output_def_ = 0;
- smobify_self ();
}
-Translator::Translator (Translator const &s)
+Translator::Translator (Context *c)
+ : daddy_context_ (c)
{
- self_scm_ = SCM_EOL;
- init ();
- output_def_ = s.output_def_;
-
smobify_self ();
}
-bool
-Translator::is_alias (SCM sym) const
+Moment
+Translator::now_mom () const
{
- return unsmob_context_def (definition_)->is_alias (sym);
+ return daddy_context_->now_mom ();
}
-bool
-Translator::try_music (Music *)
+Output_def *
+Translator::get_output_def () const
{
- return false;
+ return daddy_context_->get_output_def ();
}
-
-Moment
-Translator::now_mom () const
+Translator_group *
+Translator::get_daddy_translator () const
{
- return daddy_trans_->now_mom ();
+ return daddy_context_->implementation ();
}
void
-Translator::do_announces ()
-{
-}
-
-Music_output_def *
-Translator::get_output_def () const
+Translator::protect_event (SCM ev)
{
- return output_def_;
+ get_daddy_translator ()->protect_event (ev);
}
SCM
Translator::internal_get_property (SCM sym) const
{
- return daddy_trans_->internal_get_property (sym);
+ return daddy_context_->internal_get_property (sym);
}
void
-Translator:: stop_translation_timestep ()
+Translator::stop_translation_timestep ()
{
}
/*
- this function has 2 properties
-
- - It is called before try_music()
-
- - It is called before any user information enters the translators.
- (i.e. any \property or event is not processed yet.)
-
- */
+ this function is called once each moment, before any user
+ information enters the translators. (i.e. no \property or event has
+ been processed yet.)
+*/
void
Translator::start_translation_timestep ()
{
{
}
+void
+Translator::connect_to_context (Context *c)
+{
+ for (SCM r = get_listener_list (); scm_is_pair (r); r = scm_cdr (r))
+ {
+ SCM event_class = scm_caar (r);
+ SCM callback = scm_cdar (r);
+
+ c->events_below ()->add_listener (get_listener (callback),
+ event_class);
+ }
+}
-/*
+void
+Translator::disconnect_from_context (Context *c)
+{
+ for (SCM r = get_listener_list (); scm_is_pair (r); r = scm_cdr (r))
+ {
+ SCM event_class = scm_caar (r);
+ SCM callback = scm_cdar (r);
+
+ c->events_below ()->remove_listener (get_listener (callback),
+ event_class);
+ }
+}
- SMOBS
+SCM
+Translator::event_class_symbol (const char *ev_class)
+{
+ /* ev_class is the C++ identifier name. Convert to scm symbol */
+ string name = string (ev_class);
+ name = replace_all (&name, '_', '-');
+ name += "-event";
+ return scm_from_ascii_symbol (name.c_str ());
+}
+
+/*
+ Helps the individual static_translator_description methods of translators.
*/
SCM
-Translator::mark_smob (SCM sm)
+Translator::static_translator_description (const char *grobs,
+ const char *desc,
+ SCM listener_list,
+ const char *read,
+ const char *write)
{
- Translator * me = (Translator*) SCM_CELL_WORD_1 (sm);
- scm_gc_mark (me->simple_trans_list_);
- scm_gc_mark (me->trans_group_list_);
- scm_gc_mark (me->definition_);
- scm_gc_mark (me->properties_scm_);
- scm_gc_mark (me->accepts_list_);
+ SCM static_properties = SCM_EOL;
+
+ static_properties = scm_acons (ly_symbol2scm ("grobs-created"),
+ parse_symbol_list (grobs), static_properties);
+
+ static_properties = scm_acons (ly_symbol2scm ("description"),
+ scm_from_utf8_string (desc), static_properties);
+
+ SCM list = SCM_EOL;
+ for (; scm_is_pair (listener_list); listener_list = scm_cdr (listener_list))
+ list = scm_cons (scm_caar (listener_list), list);
+ static_properties = scm_acons (ly_symbol2scm ("events-accepted"),
+ list, static_properties);
+
+ static_properties = scm_acons (ly_symbol2scm ("properties-read"),
+ parse_symbol_list (read), static_properties);
+
+ static_properties = scm_acons (ly_symbol2scm ("properties-written"),
+ parse_symbol_list (write), static_properties);
- return me->properties_scm_;
+ return static_properties;
}
+/*
+ SMOBS
+*/
SCM
-Translator::translator_description () const
+Translator::mark_smob () const
{
+ derived_mark ();
return SCM_EOL;
}
-SCM
-Translator::static_translator_description ()const
+Global_context *
+Translator::get_global_context () const
{
- return SCM_EOL;
+ return daddy_context_->get_global_context ();
+}
+
+Context *
+Translator::get_score_context () const
+{
+ return daddy_context_->get_score_context ();
+}
+
+const char * const Translator::type_p_name_ = "ly:translator?";
+
+bool
+Translator::must_be_last () const
+{
+ return false;
}
+void
+Translator::derived_mark () const
+{
+}
-IMPLEMENT_SMOBS (Translator);
-IMPLEMENT_DEFAULT_EQUAL_P (Translator);
-IMPLEMENT_TYPE_P(Translator,"ly:translator?");
+int
+Translator::print_smob (SCM port, scm_print_state *) const
+{
+ scm_puts ("#<Translator ", port);
+ scm_puts (class_name (), port);
+ scm_puts (" >", port);
+ return 1;
+}
+
+void
+add_acknowledger (SCM ptr,
+ char const *func_name,
+ SCM &ack_hash)
+{
+ if (SCM_UNBNDP (ack_hash))
+ ack_hash = Scheme_hash_table::make_smob ();
+
+ string interface_name (func_name);
+
+ interface_name = replace_all (&interface_name, '_', '-');
+ interface_name += "-interface";
+
+ unsmob<Scheme_hash_table> (ack_hash)
+ ->set (ly_symbol2scm (interface_name.c_str ()), ptr);
+}
SCM
-Translator::get_simple_trans_list()
+generic_get_acknowledger (SCM sym, SCM ack_hash)
{
- return SCM_EOL;
+ if (SCM_UNBNDP (ack_hash))
+ return SCM_UNDEFINED;
+
+ return unsmob<Scheme_hash_table> (ack_hash)->get (sym);
}
+
+Moment
+get_event_length (Stream_event *e)
+{
+ Moment *m = unsmob<Moment> (e->get_property ("length"));
+ if (m)
+ return *m;
+ else
+ return Moment (0);
+}
+
+Moment
+get_event_length (Stream_event *e, Moment now)
+{
+ Moment len = get_event_length (e);
+
+ if (now.grace_part_)
+ {
+ len.grace_part_ = len.main_part_;
+ len.main_part_ = Rational (0);
+ }
+ return len;
+}
+
+/*
+ Helper, used through ASSIGN_EVENT_ONCE to throw warnings for
+ simultaneous events. The helper is only useful in listen_* methods
+ of translators.
+*/
+bool
+internal_event_assignment (Stream_event **old_ev, Stream_event *new_ev, const char *function)
+{
+ if (*old_ev
+ && !to_boolean (scm_equal_p ((*old_ev)->self_scm (),
+ new_ev->self_scm ())))
+ {
+ /* extract event class from function name */
+ string ev_class = function;
+
+ /* This assertion fails if EVENT_ASSIGNMENT was called outside a
+ translator listener. Don't do that. */
+ const char *prefix = "listen_";
+ assert (0 == ev_class.find (prefix));
+
+ /* "listen_foo_bar" -> "foo-bar" */
+ ev_class.erase (0, strlen (prefix));
+ replace_all (&ev_class, '_', '-');
+
+ new_ev->origin ()->warning (_f ("Two simultaneous %s events, junking this one", ev_class.c_str ()));
+ (*old_ev)->origin ()->warning (_f ("Previous %s event here", ev_class.c_str ()));
+ return false;
+ }
+ else
+ {
+ *old_ev = new_ev;
+ return true;
+ }
+}
+
+// Base class. Not instantiated. No ADD_TRANSLATOR call.
projects / lilypond.git / blobdiff