release: 1.3.109

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

diff --git a/lily/key-performer.cc b/lily/key-performer.cc
index 5affa0c1f3266415b2839b2a5aa1135958990012..27144dba57beaf01024fde67873b00342d8d84d8 100644 (file)
--- a/lily/key-performer.cc
+++ b/lily/key-performer.cc
@@ -3,56 +3,78 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
+  (c)  1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
-#include "key-performer.hh"
 #include "command-request.hh"
 #include "audio-item.hh"
+#include "performer.hh"
 
+class Key_performer : public Performer
+{
+public:
+  VIRTUAL_COPY_CONS(Translator);
+  
+  Key_performer();
+  ~Key_performer();
+
+protected:
+  virtual bool try_music (Music* req_l);
+  virtual void create_grobs ();
+  virtual void stop_translation_timestep ();
 
+private:
+  Key_change_req* key_req_l_;
+  Audio_key* audio_p_;
+};
 
-IMPLEMENT_IS_TYPE_B1(Key_performer,Performer);
-ADD_THIS_PERFORMER(Key_performer);
+ADD_THIS_TRANSLATOR (Key_performer);
 
-Key_performer::Key_performer()
+Key_performer::Key_performer ()
 {
-    key_req_l_ = 0;
+  key_req_l_ = 0;
+  audio_p_ = 0;
 }
 
-Key_performer::~Key_performer()
+Key_performer::~Key_performer ()
 {
 }
 
-void 
-Key_performer::do_print() const
+void
+Key_performer::create_grobs ()
 {
-#ifndef NPRINT
-    if ( key_req_l_ )
-       key_req_l_->print();
-#endif
+  if (key_req_l_ &&
+      gh_list_p (key_req_l_->get_mus_property ("pitch-alist")))
+    {
+      audio_p_ = new Audio_key (); // *key_req_l_->key_);
+      Audio_element_info info (audio_p_, key_req_l_);
+      announce_element (info);
+      key_req_l_ = 0;
+    }
 }
 
 void
-Key_performer::process_requests()
+Key_performer::stop_translation_timestep ()
 {
-    if ( key_req_l_ )
-       play( new Audio_key( key_req_l_ ) );
-    key_req_l_ = 0;
+  if (audio_p_)
+    {
+      play_element (audio_p_);
+      audio_p_ = 0;
+    }
 }
 
 bool
-Key_performer::do_try_request( Request* req_l )
+Key_performer::try_music (Music* req_l)
 {
-    if ( key_req_l_ )
-       return false;
-
-    if ( req_l->command() )
-       key_req_l_ = req_l->command()->keychange();
+  if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
+    {
+      if (key_req_l_)
+       warning (_ ("FIXME: key change merge"));
 
-    if ( key_req_l_ )
-       return true;
+      key_req_l_ = kc;
+      return true;
+    }
 
-    return false;
+  return false;
 }