rewrite balloon-text support. This is now a separate grob, with its

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

diff --git a/lily/key-engraver.cc b/lily/key-engraver.cc
index 3a4e848907bb550fb1bbd44736f2e507d2e28038..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:
@@ -38,13 +39,12 @@ 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);
-  
 };
 
 void
@@ -64,45 +64,61 @@ Key_engraver::create_key (bool is_default)
 {
   if (!item_)
     {
-      item_ = make_item ("KeySignature", key_event_ ? key_event_->self_scm () : SCM_EOL);
+      item_ = make_item ("KeySignature",
+                        key_event_ ? key_event_->self_scm () : SCM_EOL);
 
       item_->set_property ("c0-position",
                           get_property ("middleCPosition"));
 
       SCM last = get_property ("lastKeySignature");
       SCM key = get_property ("keySignature");
-      if (to_boolean (get_property ("printKeyCancellation"))
+
+      if ((to_boolean (get_property ("printKeyCancellation"))
+          || key == SCM_EOL)
          && !scm_is_eq (last, key))
        {
-         cancellation_ = make_item ("KeyCancellation", key_event_ ? key_event_->self_scm () : SCM_EOL);
-         cancellation_->set_property ("accidentals", last);
-         cancellation_->set_property ("c0-position",
-                                      get_property ("middleCPosition"));
+         SCM restore = SCM_EOL;
+         SCM *tail = &restore;
+         for (SCM s = last; scm_is_pair (s); s = scm_cdr (s))
+           {
+             if (scm_assoc (scm_caar (s), key) == SCM_BOOL_F)
+               {
+                 *tail = scm_acons (scm_caar (s),
+                                    scm_from_int (0), *tail);
+                 tail = SCM_CDRLOC (*tail);
+               }
+           }
+
+         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 ("accidentals", key);
+      item_->set_property ("alteration-alist", key);
     }
 
   if (!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
@@ -111,9 +127,7 @@ Key_engraver::acknowledge_clef (Grob_info info)
   (void)info;
   SCM c = get_property ("createKeyOnClefChange");
   if (to_boolean (c))
-    {
-      create_key (false);
-    }
+    create_key (false);
 }
 
 void
@@ -121,9 +135,7 @@ Key_engraver::acknowledge_bar_line (Grob_info info)
 {
   (void)info;
   if (scm_is_pair (get_property ("keySignature")))
-    {
-      create_key (true);
-    }
+    create_key (true);
 }
 
 void
@@ -144,7 +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))
@@ -152,7 +164,7 @@ Key_engraver::read_event (Music const *r)
 
   SCM n = scm_list_copy (p);
   SCM accs = SCM_EOL;
-  for (SCM s = get_property ("keyAccidentalOrder");
+  for (SCM s = get_property ("keyAlterationOrder");
        scm_is_pair (s); s = scm_cdr (s))
     {
       if (scm_is_pair (scm_member (scm_car (s), n)))
@@ -181,13 +193,24 @@ Key_engraver::initialize ()
   context ()->set_property ("tonic", p.smobbed_copy ());
 }
 
-
-ADD_ACKNOWLEDGER (Key_engraver,clef);
-ADD_ACKNOWLEDGER (Key_engraver,bar_line);
+ADD_ACKNOWLEDGER (Key_engraver, clef);
+ADD_ACKNOWLEDGER (Key_engraver, bar_line);
 
 ADD_TRANSLATOR (Key_engraver,
-               /* descr */ "",
-               /* creats*/ "KeySignature",
-               /* accepts */ "key-change-event",
-               /* reads */ "keySignature printKeyCancellation lastKeySignature explicitKeySignatureVisibility createKeyOnClefChange keyAccidentalOrder keySignature",
-               /* write */ "lastKeySignature tonic keySignature");
+               /* doc */ "",
+               /* create */ "KeySignature",
+               
+               /* read */
+               "createKeyOnClefChange "
+               "explicitKeySignatureVisibility "
+               "keyAlterationOrder "
+               "keySignature "
+               "keySignature "
+               "lastKeySignature "
+               "printKeyCancellation "
+               ,
+               
+               /* write */
+               "keySignature "
+               "lastKeySignature "
+               "tonic ")