/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 2006--2012 Erik Sandberg <mandolaerik@gmail.com>
+ Copyright (C) 2006--2015 Erik Sandberg <mandolaerik@gmail.com>
LilyPond is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
2, 0, 0, (SCM to, SCM from),
"Make the dispatcher @var{to} listen to events from @var{from}.")
{
- Dispatcher *t = unsmob_dispatcher (to);
- Dispatcher *f = unsmob_dispatcher (from);
+ Dispatcher *t = unsmob<Dispatcher> (to);
+ Dispatcher *f = unsmob<Dispatcher> (from);
LY_ASSERT_SMOB (Dispatcher, to, 1);
LY_ASSERT_SMOB (Dispatcher, from, 2);
t->register_as_listener (f);
- return SCM_UNDEFINED;
+ return SCM_UNSPECIFIED;
+}
+
+LY_DEFINE (ly_disconnect_dispatchers, "ly:disconnect-dispatchers",
+ 2, 0, 0, (SCM to, SCM from),
+ "Stop the dispatcher @var{to} listening to events from @var{from}.")
+{
+ Dispatcher *t = unsmob<Dispatcher> (to);
+ Dispatcher *f = unsmob<Dispatcher> (from);
+
+ LY_ASSERT_SMOB (Dispatcher, to, 1);
+ LY_ASSERT_SMOB (Dispatcher, from, 2);
+
+ t->unregister_as_listener (f);
+
+ return SCM_UNSPECIFIED;
}
LY_DEFINE (ly_add_listener, "ly:add-listener",
- 2, 0, 1, (SCM list, SCM disp, SCM cl),
- "Add the listener @var{list} to the dispatcher @var{disp}."
- " Whenever @var{disp} hears an event of class @var{cl},"
- " it is forwarded to @var{list}.")
+ 2, 0, 1, (SCM callback, SCM disp, SCM cl),
+ "Add the single-argument procedure @var{callback} as listener"
+ " to the dispatcher @var{disp}. Whenever @var{disp} hears"
+ " an event of class @var{cl}, it calls @var{callback} with it.")
{
- Listener *l = unsmob_listener (list);
- Dispatcher *d = unsmob_dispatcher (disp);
+ Dispatcher *d = unsmob<Dispatcher> (disp);
- LY_ASSERT_SMOB (Listener, list, 1);
+ LY_ASSERT_TYPE (ly_is_procedure, callback, 1);
LY_ASSERT_SMOB (Dispatcher, disp, 2);
for (int arg = SCM_ARG3; scm_is_pair (cl); cl = scm_cdr (cl), arg++)
{
SCM sym = scm_car (cl);
SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, arg, __FUNCTION__, "symbol");
- d->add_listener (*l, sym);
+ d->add_listener (callback, sym);
}
- return SCM_UNDEFINED;
+ return SCM_UNSPECIFIED;
+}
+
+LY_DEFINE (ly_listened_event_types, "ly:listened-event-types",
+ 1, 0, 0, (SCM disp),
+ "Return a list of all event types that @var{disp} listens"
+ " to.")
+{
+ LY_ASSERT_SMOB (Dispatcher, disp, 1);
+
+ SCM result = unsmob<Dispatcher> (disp)->listened_types ();
+
+ scm_remember_upto_here_1 (disp);
+
+ return result;
+}
+
+LY_DEFINE (ly_listened_event_class_p, "ly:listened-event-class?",
+ 2, 0, 0, (SCM disp, SCM cl),
+ "Does @var{disp} listen to any event type in the list"
+ " @var{cl}?")
+{
+ LY_ASSERT_SMOB (Dispatcher, disp, 1);
+ LY_ASSERT_TYPE (scm_is_pair, cl, 2);
+
+ bool result = unsmob<Dispatcher> (disp)->is_listened_class (cl);
+
+ scm_remember_upto_here_1 (disp);
+
+ return scm_from_bool (result);
}
LY_DEFINE (ly_broadcast, "ly:broadcast",
2, 0, 0, (SCM disp, SCM ev),
"Send the stream event @var{ev} to the dispatcher @var{disp}.")
{
- Dispatcher *d = unsmob_dispatcher (disp);
- Stream_event *e = unsmob_stream_event (ev);
+ Dispatcher *d = unsmob<Dispatcher> (disp);
+ Stream_event *e = unsmob<Stream_event> (ev);
LY_ASSERT_SMOB (Dispatcher, disp, 1);
LY_ASSERT_SMOB (Stream_event, ev, 2);
d->broadcast (e);
- return SCM_UNDEFINED;
+ return SCM_UNSPECIFIED;
}