release: 1.3.142

[lilypond.git] / lily / thread-devnull-engraver.cc

diff --git a/lily/thread-devnull-engraver.cc b/lily/thread-devnull-engraver.cc
index 6436f0c2efd5c39203f33153ea57e79eb2b5a0b0..9e995b2f741183c2c7a23dfc16c7a0e218d7763b 100644 (file)
--- a/lily/thread-devnull-engraver.cc
+++ b/lily/thread-devnull-engraver.cc
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
   
-  (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
+  (c) 2000--2001 Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
 #include "engraver.hh"
@@ -17,17 +17,29 @@ public:
   VIRTUAL_COPY_CONS (Translator);
   
 protected:
-  virtual void acknowledge_element (Score_element_info);
+  virtual void acknowledge_grob (Grob_info);
 };
 
 ADD_THIS_TRANSLATOR (Thread_devnull_engraver);
 
 void
-Thread_devnull_engraver::acknowledge_element (Score_element_info i)
+Thread_devnull_engraver::acknowledge_grob (Grob_info i)
 {
-  if (daddy_trans_l_->id_str_ == "two"
-      && (to_boolean (get_property ("unison"))
-         || to_boolean (get_property ("unisilence")))
-      && to_boolean (get_property ("soloADue")))
-    i.elem_l_->suicide ();
+  SCM s = get_property ("devNullThread");
+#if 0
+  /* No need, next if will never be true */
+  if (s == ly_symbol2scm ("never"))
+    return;
+#endif
+
+  if (s == ly_symbol2scm ("allways")
+      || (s == SCM_EOL
+         && daddy_trans_l_->id_str_.left_str (3) == "two"
+         && (to_boolean (get_property ("unison"))
+             || to_boolean (get_property ("unisilence")))
+         && to_boolean (get_property ("soloADue"))))
+    {
+      /* Ugh, we can suicide them, but they remain living */
+      i.elem_l_->suicide ();
+    }
 }