X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fdispatcher.cc;h=0d899f94ba7ea27cfcc0b610ee4bd14d0eecb52f;hb=d4047469357aa91fc32ef9915995cc3a9bc31d2d;hp=ad1a624b121917b67fe03bc0944cce96a0325de4;hpb=9d1520b21710bd22872010ae9aa4c4899014e9d4;p=lilypond.git

diff --git a/lily/dispatcher.cc b/lily/dispatcher.cc
index ad1a624b12..0d899f94ba 100644
--- a/lily/dispatcher.cc
+++ b/lily/dispatcher.cc
@@ -59,7 +59,7 @@ Dispatcher::print_smob (SCM s, SCM p, scm_print_state *)
   Dispatcher *me = (Dispatcher *) SCM_CELL_WORD_1 (s);
   scm_puts ("#<Dispatcher ", p);
   scm_write (scm_call_1 (ly_lily_module_constant ("hash-table->alist"),
-			 me->listeners_), p);
+                         me->listeners_), p);
   scm_puts (">", p);
   return 1;
 }
@@ -77,19 +77,13 @@ void
 Dispatcher::dispatch (SCM sev)
 {
   Stream_event *ev = unsmob_stream_event (sev);
-  SCM class_symbol = ev->get_property ("class");
-  if (!scm_is_symbol (class_symbol))
-    {
-      warning (_ ("Event class should be a symbol"));
-      return;
-    }
-
-  SCM class_list = scm_call_1 (ly_lily_module_constant ("ly:make-event-class"), class_symbol);
+  SCM class_list = ev->get_property ("class");
   if (!scm_is_pair (class_list))
     {
-      ev->origin ()->warning (_f ("Unknown event class %s", ly_symbol2string (class_symbol).c_str ()));
+      ev->origin ()->warning (_ ("Event class should be a list"));
       return;
     }
+
 #if 0
   bool sent = false;
 #endif
@@ -173,6 +167,36 @@ Dispatcher::dispatch (SCM sev)
 #endif
 }
 
+bool
+Dispatcher::is_listened_class (SCM cl)
+{
+  for (; scm_is_pair (cl); cl = scm_cdr (cl))
+    {
+      SCM list = scm_hashq_ref (listeners_, scm_car (cl), SCM_EOL);
+      if (scm_is_pair (list))
+        return true;
+    }
+  return false;
+}
+
+static SCM
+accumulate_types (void * /* closure */,
+                  SCM key,
+                  SCM val,
+                  SCM result)
+{
+  if (scm_is_pair (val))
+    return scm_cons (key, result);
+  return result;
+}
+
+SCM
+Dispatcher::listened_types ()
+{
+  return scm_internal_hash_fold ((scm_t_hash_fold_fn) &accumulate_types,
+                                 NULL, SCM_EOL, listeners_);
+}
+
 void
 Dispatcher::broadcast (Stream_event *ev)
 {
@@ -235,7 +259,7 @@ Dispatcher::remove_listener (Listener l, SCM ev_class)
   scm_hashq_set_x (listeners_, ev_class, list);
 
   if (first)
-    warning ("Attempting to remove nonexisting listener.");
+    warning (_ ("Attempting to remove nonexisting listener."));
   else if (!scm_is_pair (list))
     {
       /* Unregister with all dispatchers. */
@@ -257,7 +281,7 @@ Dispatcher::register_as_listener (Dispatcher *disp)
   // Don't register twice to the same dispatcher.
   if (scm_assq (disp->self_scm (), dispatchers_) != SCM_BOOL_F)
     {
-      warning ("Already listening to dispatcher, ignoring request");
+      warning (_ ("Already listening to dispatcher, ignoring request"));
       return;
     }