X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fcontext.cc;h=4d949e8379c0a02f34003794b7f5e62bf3ec0b80;hb=3f0f59297670174562e7d66ae7dd8d73a04be6f8;hp=34b75523ea38d3e1e2f76c68bf606c55c7e02ee7;hpb=2f0c6eb19208485a86d3416db3f3640a1d54752a;p=lilypond.git

diff --git a/lily/context.cc b/lily/context.cc
index 34b75523ea..4d949e8379 100644
--- a/lily/context.cc
+++ b/lily/context.cc
@@ -91,6 +91,7 @@ Context::Context ()
   definition_mods_ = SCM_EOL;
   event_source_ = 0;
   events_below_ = 0;
+  ancestor_lookup_ = SCM_UNDEFINED;
 
   smobify_self ();
 
@@ -452,7 +453,7 @@ be called from any other place than the send_stream_event macro.
 void
 Context::internal_send_stream_event (SCM type, Input *origin, SCM props[])
 {
-  Stream_event *e = new Stream_event (type, origin);
+  Stream_event *e = new Stream_event (make_event_class (type), origin);
   for (int i = 0; props[i]; i += 2)
     {
       e->set_property (props[i], props[i + 1]);
@@ -593,6 +594,14 @@ Context::get_score_context () const
     return 0;
 }
 
+SCM
+Context::make_event_class (SCM event_type)
+{
+  if (SCM_UNBNDP (ancestor_lookup_))
+    ancestor_lookup_ = get_global_context ()->ancestor_lookup_;
+  return scm_hashq_ref (ancestor_lookup_, event_type, SCM_EOL);
+}
+
 Output_def *
 Context::get_output_def () const
 {
@@ -661,6 +670,8 @@ Context::mark_smob (SCM sm)
   if (me->events_below_)
     scm_gc_mark (me->events_below_->self_scm ());
 
+  scm_gc_mark (me->ancestor_lookup_);
+
   return me->properties_scm_;
 }