#include "translator.hh"
+#include "warn.hh"
+#include "translator-group.hh"
#include "context-def.hh"
-#include "dispatcher.hh"
#include "global-context.hh"
-#include "international.hh"
-#include "translator-group.hh"
-#include "warn.hh"
#include "translator.icc"
#include "ly-smobs.icc"
must_be_last_ = src.must_be_last_;
}
+bool
+Translator::try_music (Music *)
+{
+ return false;
+}
+
Moment
Translator::now_mom () const
{
return daddy_context_->implementation ();
}
-void
-Translator::protect_event (SCM ev)
-{
- get_daddy_translator ()->protect_event (ev);
-}
-
SCM
Translator::internal_get_property (SCM sym) const
{
}
/*
- this function is called once each moment, before any user
- information enters the translators. (i.e. no \property or event has
- been processed yet.)
+ 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.)
*/
void
Translator::start_translation_timestep ()
{
}
-void
-Translator::connect_to_context (Context *c)
-{
- for (translator_listener_record *r = get_listener_list (); r; r=r->next_)
- c->events_below ()->add_listener (r->get_listener_ (this), r->event_class_);
-}
-
-void
-Translator::disconnect_from_context (Context *c)
-{
- for (translator_listener_record *r = get_listener_list (); r; r=r->next_)
- c->events_below ()->remove_listener (r->get_listener_ (this), r->event_class_);
-}
-
-static SCM listened_event_class_table;
-void
-ensure_listened_hash ()
-{
- if (!listened_event_class_table)
- listened_event_class_table = scm_permanent_object (scm_c_make_hash_table (61));
-}
-
-
-LY_DEFINE (ly_get_listened_event_classes, "ly:get-listened-event-classes",
- 0, 0, 0, (),
- "Returns a list of all event classes that some translator listens to.")
-{
- ensure_listened_hash ();
- return ly_hash_table_keys (listened_event_class_table);
-}
-
-LY_DEFINE (ly_is_listened_event_class, "ly:is-listened-event-class",
- 1, 0, 0, (SCM sym),
- "Is @var{sym} a listened event class?")
-{
- ensure_listened_hash ();
- return scm_hashq_ref (listened_event_class_table, sym, SCM_BOOL_F);
-}
-
-void
-add_listened_event_class (SCM sym)
-{
- ensure_listened_hash ();
- scm_hashq_set_x (listened_event_class_table, sym, SCM_BOOL_T);
-}
-
-
-/*
- internally called once, statically, for each translator
- listener. Connects the name of an event class with a procedure that
- fetches the corresponding listener.
-
- The method should only be called from the macro
- IMPLEMENT_TRANSLATOR_LISTENER.
- */
-void
-Translator::add_translator_listener (translator_listener_record **listener_list,
- translator_listener_record *r,
- Listener (*get_listener) (void *),
- 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";
-
- SCM class_sym = scm_str2symbol (name.c_str ());
-
- add_listened_event_class (class_sym);
-
- r->event_class_ = class_sym;
- r->get_listener_ = get_listener;
- r->next_ = *listener_list;
- *listener_list = r;
-}
-
-/*
- Used by ADD_THIS_TRANSLATOR to extract a list of event-class names
- for each translator. This list is used by the internals
- documentation.
-*/
-SCM
-Translator::get_listened_class_list (const translator_listener_record *listeners) const
-{
- SCM list = SCM_EOL;
- for (; listeners; listeners = listeners->next_)
- list = scm_cons (listeners->event_class_, list);
- return list;
-}
-
/*
SMOBS
*/
return daddy_context_->get_global_context ();
}
-Context *
+Score_context *
Translator::get_score_context () const
{
return daddy_context_->get_score_context ();
interface_name = replace_all (interface_name, '_', '-');
interface_name += "-interface";
- /*
- this is only called during program init, so safe to use scm_gc_protect_object()
- */
inf.symbol_ = scm_gc_protect_object (ly_symbol2scm (interface_name.c_str ()));
ack_array->push_back (inf);
}
return 0;
}
-Moment
-get_event_length (Stream_event *e)
-{
- Moment *m = unsmob_moment (e->get_property ("length"));
- if (m)
- return *m;
- else
- return Moment (0);
-}
-
-/*
- 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)
- {
- /* extract event class from function name */
- const char *prefix = "listen_";
- string ev_class = function;
- /* This assertion fails if EVENT_ASSIGNMENT was called outside a
- translator listener. Don't do that. */
- 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;
- }
-}
-
ADD_TRANSLATOR (Translator,
"Base class. Unused",
"",
projects / lilypond.git / blobdiff