X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fkey-performer.cc;h=a611405244433a2872e2134050bfb64f164fb2aa;hb=refs%2Fheads%2Fdebian;hp=81fa1c5296eced08330422c4dab90e04665a09d7;hpb=af343e2537468645e4fe97be4c560716be88a354;p=lilypond.git

diff --git a/lily/key-performer.cc b/lily/key-performer.cc
index 81fa1c5296..a611405244 100644
--- a/lily/key-performer.cc
+++ b/lily/key-performer.cc
@@ -1,22 +1,50 @@
 /*
-  key-performer.cc -- implement Key_performer
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1997--2012 Jan Nieuwenhuizen <janneke@gnu.org>
 
-  (c)  1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include "key-performer.hh"
-#include "command-request.hh"
 #include "audio-item.hh"
+#include "music-sequence.hh"
+#include "performer.hh"
+#include "stream-event.hh"
+#include "warn.hh"
+
+#include "translator.icc"
+
+class Key_performer : public Performer
+{
+public:
+  TRANSLATOR_DECLARATIONS (Key_performer);
+  ~Key_performer ();
 
+protected:
+  void process_music ();
+  void stop_translation_timestep ();
 
-ADD_THIS_TRANSLATOR (Key_performer);
+  DECLARE_TRANSLATOR_LISTENER (key_change);
+private:
+  Stream_event *key_ev_;
+  Audio_key *audio_;
+};
 
 Key_performer::Key_performer ()
 {
-  key_req_l_ = 0;
-  audio_p_ = 0;
+  key_ev_ = 0;
+  audio_ = 0;
 }
 
 Key_performer::~Key_performer ()
@@ -24,39 +52,70 @@ Key_performer::~Key_performer ()
 }
 
 void
-Key_performer::do_process_music ()
+Key_performer::process_music ()
 {
-  if (key_req_l_ && key_req_l_->key_)
+  if (key_ev_)
     {
-      audio_p_ = new Audio_key (); // *key_req_l_->key_);
-      Audio_element_info info (audio_p_, key_req_l_);
+      SCM pitchlist = key_ev_->get_property ("pitch-alist");
+      SCM proc = ly_lily_module_constant ("alterations-in-key");
+
+      SCM acc = scm_call_1 (proc, pitchlist);
+
+      Pitch key_do (0,
+                    scm_to_int (scm_caar (pitchlist)),
+                    ly_scm2rational (scm_cdar (pitchlist)));
+
+      Pitch c_do (0, 0, 0);
+
+      SCM c_pitchlist
+        = ly_transpose_key_alist (pitchlist,
+                                  pitch_interval (key_do, c_do).smobbed_copy ());
+
+      /* MIDI keys are too limited for lilypond scales.
+         We check for minor scale and assume major otherwise.  */
+
+      SCM third = scm_assoc (scm_from_int (2),
+                             c_pitchlist);
+      bool minor = (scm_is_pair (third)
+                    && scm_is_number (scm_cdr (third))
+                    && ly_scm2rational (scm_cdr (third)) == FLAT_ALTERATION);
+
+      audio_ = new Audio_key (scm_to_int (acc),
+                              !minor);
+
+      Audio_element_info info (audio_, key_ev_);
       announce_element (info);
-      key_req_l_ = 0;
+      key_ev_ = 0;
     }
 }
 
 void
-Key_performer::do_pre_move_processing ()
+Key_performer::stop_translation_timestep ()
 {
-  if (audio_p_)
+  if (audio_)
     {
-      play_element (audio_p_);
-      audio_p_ = 0;
+      audio_ = 0;
     }
 }
 
-bool
-Key_performer::do_try_music (Music* req_l)
+IMPLEMENT_TRANSLATOR_LISTENER (Key_performer, key_change);
+void
+Key_performer::listen_key_change (Stream_event *ev)
 {
-  if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
-    {
-      if (key_req_l_)
-	warning (_ ("FIXME: key change merge"));
+  if (!key_ev_)
+    key_ev_ = ev;
+}
 
-      key_req_l_ = kc;
-      return true;
-    }
+ADD_TRANSLATOR (Key_performer,
+                /* doc */
+                "",
 
-  return false;
-}
+                /* create */
+                "",
+
+                /* read */
+                "",
 
+                /* write */
+                ""
+               );