move from abe.ly

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

diff --git a/lily/thread-devnull-engraver.cc b/lily/thread-devnull-engraver.cc
index 9e995b2f741183c2c7a23dfc16c7a0e218d7763b..8480139e6a6867e5a2a1909036cd7bbd85b4ff9d 100644 (file)
--- a/lily/thread-devnull-engraver.cc
+++ b/lily/thread-devnull-engraver.cc
@@ -3,43 +3,62 @@
 
   source file of the GNU LilyPond music typesetter
   
-  (c) 2000--2001 Jan Nieuwenhuizen <janneke@gnu.org>
+  (c) 2000--2003 Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
 #include "engraver.hh"
 #include "item.hh"
-#include "musical-request.hh"
+#include "event.hh"
 #include "translator-group.hh"
 
 class Thread_devnull_engraver : public Engraver
 {
 public:
-  VIRTUAL_COPY_CONS (Translator);
+  TRANSLATOR_DECLARATIONS(Thread_devnull_engraver);
   
 protected:
   virtual void acknowledge_grob (Grob_info);
 };
 
-ADD_THIS_TRANSLATOR (Thread_devnull_engraver);
+
 
 void
 Thread_devnull_engraver::acknowledge_grob (Grob_info i)
 {
   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")
+  if (s == ly_symbol2scm ("always")
       || (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"))))
+         && to_boolean (get_property ("soloADue"))
+         && ((daddy_trans_->id_string_.left_string (3) == "two"
+              && (to_boolean (get_property ("unison"))
+                  || to_boolean (get_property ("unisilence"))))
+
+             /* Maybe this should be optional? */
+             || to_boolean (get_property ("othersolo")))))
     {
-      /* Ugh, we can suicide them, but they remain living */
-      i.elem_l_->suicide ();
+      i.grob_->suicide ();
     }
 }
+Thread_devnull_engraver::Thread_devnull_engraver(){}
+
+ENTER_DESCRIPTION(Thread_devnull_engraver,
+/* descr */       "Kill elements whenever we are Voice called `two' and either "
+"unison, unisilence or soloADue is set.@footnote{On unix systems, the "
+"file @file{/dev/null} is special device: anything written to it is "
+"discarded.}. This engraver works closely together with the part "
+"combiner.  When the part combiner notices that two threads are "
+"identical, it tells the @code{Thread_devnull_engraver} to discard " 
+"everything in the second thread. "
+,
+/* creats*/       "",
+/* accepts */     "",
+/* acks  */      "grob-interface",
+/* reads */       "",
+/* write */       "");