2 dispatcher.cc -- implement Scheme bindings for Dispatcher
4 source file of the GNU LilyPond music typesetter
6 (c) 2006 Erik Sandberg <mandolaerik@gmail.com>
9 #include "dispatcher.hh"
11 LY_DEFINE (ly_make_dispatcher, "ly:make-dispatcher",
13 "Returns a newly created dispatcher.")
15 return (new Dispatcher ())->unprotect ();
18 LY_DEFINE (ly_register_dispatcher, "ly:connect-dispatchers",
19 2, 0, 0, (SCM to, SCM from),
20 "Makes the dispatcher @var{to} listen to events from @var{from}." )
22 Dispatcher *t = unsmob_dispatcher (to);
23 Dispatcher *f = unsmob_dispatcher (from);
24 SCM_ASSERT_TYPE (t, from, SCM_ARG1, __FUNCTION__, "dispatcher");
25 SCM_ASSERT_TYPE (f, to, SCM_ARG2, __FUNCTION__, "dispatcher");
26 t->register_as_listener (f);
31 LY_DEFINE (ly_add_listener, "ly:add-listener",
32 2, 0, 1, (SCM list, SCM disp, SCM cl),
33 "Adds the listener @var{list} to the dispatcher @var{disp}.\n"
34 " Whenever @var{disp} hears an event of class @var{cl}, it will be forwarded to @var{list}.\n" )
36 Listener *l = unsmob_listener (list);
37 Dispatcher *d = unsmob_dispatcher (disp);
38 SCM_ASSERT_TYPE (l, list, SCM_ARG1, __FUNCTION__, "listener");
39 SCM_ASSERT_TYPE (d, disp, SCM_ARG2, __FUNCTION__, "dispatcher");
41 for (int arg = SCM_ARG3; scm_is_pair (cl); cl = scm_cdr (cl), arg++)
43 SCM sym = scm_car (cl);
44 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, arg, __FUNCTION__, "symbol");
45 d->add_listener (*l, sym);
51 LY_DEFINE (ly_broadcast, "ly:broadcast",
52 2, 0, 0, (SCM disp, SCM ev),
53 "Sends the stream event @var{ev} to the dispatcher\n"
56 Dispatcher *d = unsmob_dispatcher (disp);
57 Stream_event *e = unsmob_stream_event (ev);
58 SCM_ASSERT_TYPE (d, disp, SCM_ARG1, __FUNCTION__, "dispatcher");
59 SCM_ASSERT_TYPE (e, ev, SCM_ARG2, __FUNCTION__, "stream event");