Merge branch 'cvs-head' of ssh+git://hanwen@repo.or.cz/srv/git/lilypond into master...

[lilypond.git] / lily / key-engraver.cc

diff --git a/lily/key-engraver.cc b/lily/key-engraver.cc
index b0d2557da82346e0e53898d1b3414fd6f7f24502..26b3985e4e31fcb760a08701ec92f4f72cc2ac74 100644 (file)
--- a/lily/key-engraver.cc
+++ b/lily/key-engraver.cc
@@ -3,17 +3,18 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 
-#include "item.hh"
 #include "bar-line.hh"
-#include "staff-symbol-referencer.hh"
+#include "clef.hh"
 #include "context.hh"
 #include "engraver.hh"
-#include "protected-scm.hh"
-#include "clef.hh"
+#include "item.hh"
 #include "pitch.hh"
+#include "protected-scm.hh"
+#include "staff-symbol-referencer.hh"
+#include "stream-event.hh"
 
 #include "translator.icc"
 
@@ -27,9 +28,9 @@
 class Key_engraver : public Engraver
 {
   void create_key (bool);
-  void read_event (Music const *r);
+  void read_event (Stream_event const *r);
 
-  Music *key_event_;
+  Stream_event *key_event_;
   Item *item_;
   Item *cancellation_;
 public:
@@ -38,10 +39,10 @@ public:
 protected:
   virtual void initialize ();
   virtual void finalize ();
-  virtual bool try_music (Music *event);
   void stop_translation_timestep ();
   void process_music ();
 
+  DECLARE_TRANSLATOR_LISTENER (key_change);
   DECLARE_ACKNOWLEDGER (clef);
   DECLARE_ACKNOWLEDGER (bar_line);
 };
@@ -76,10 +77,6 @@ Key_engraver::create_key (bool is_default)
           || key == SCM_EOL)
          && !scm_is_eq (last, key))
        {
-         cancellation_ = make_item ("KeyCancellation",
-                                    key_event_
-                                    ? key_event_->self_scm () : SCM_EOL);
-
          SCM restore = SCM_EOL;
          SCM *tail = &restore;
          for (SCM s = last; scm_is_pair (s); s = scm_cdr (s))
@@ -92,9 +89,16 @@ Key_engraver::create_key (bool is_default)
                }
            }
 
-         cancellation_->set_property ("alteration-alist", restore);
-         cancellation_->set_property ("c0-position",
-                                      get_property ("middleCPosition"));
+         if (scm_is_pair (restore))
+           {
+             cancellation_ = make_item ("KeyCancellation",
+                                        key_event_
+                                        ? key_event_->self_scm () : SCM_EOL);
+         
+             cancellation_->set_property ("alteration-alist", restore);
+             cancellation_->set_property ("c0-position",
+                                          get_property ("middleCPosition"));
+           }
        }
       item_->set_property ("alteration-alist", key);
     }
@@ -103,23 +107,18 @@ Key_engraver::create_key (bool is_default)
     {
       SCM visibility = get_property ("explicitKeySignatureVisibility");
       item_->set_property ("break-visibility", visibility);
+      if (cancellation_)
+       cancellation_->set_property ("break-visibility", visibility);
     }
 }
 
-bool
-Key_engraver::try_music (Music *event)
+IMPLEMENT_TRANSLATOR_LISTENER (Key_engraver, key_change);
+void
+Key_engraver::listen_key_change (Stream_event *ev)
 {
-  if (event->is_mus_type ("key-change-event"))
-    {
-      /* do this only once, just to be on the safe side.  */
-      if (!key_event_)
-       {
-         key_event_ = event;
-         read_event (key_event_);
-       }
-      return true;
-    }
-  return false;
+  /* do this only once, just to be on the safe side.  */
+  if (ASSIGN_EVENT_ONCE (key_event_, ev))
+    read_event (key_event_);
 }
 
 void
@@ -157,7 +156,7 @@ Key_engraver::stop_translation_timestep ()
 }
 
 void
-Key_engraver::read_event (Music const *r)
+Key_engraver::read_event (Stream_event const *r)
 {
   SCM p = r->get_property ("pitch-alist");
   if (!scm_is_pair (p))
@@ -200,8 +199,18 @@ ADD_ACKNOWLEDGER (Key_engraver, bar_line);
 ADD_TRANSLATOR (Key_engraver,
                /* doc */ "",
                /* create */ "KeySignature",
-               /* accept */ "key-change-event",
-               /* read */ "keySignature printKeyCancellation lastKeySignature "
-               "explicitKeySignatureVisibility createKeyOnClefChange "
-               "keyAlterationOrder keySignature",
-               /* write */ "lastKeySignature tonic keySignature");
+               
+               /* read */
+               "createKeyOnClefChange "
+               "explicitKeySignatureVisibility "
+               "keyAlterationOrder "
+               "keySignature "
+               "keySignature "
+               "lastKeySignature "
+               "printKeyCancellation "
+               ,
+               
+               /* write */
+               "keySignature "
+               "lastKeySignature "
+               "tonic ")