Issue 5167/6: Changes: show \markup xxx = ... \etc assignments

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

diff --git a/lily/arpeggio-engraver.cc b/lily/arpeggio-engraver.cc
index b488e1be6468fe3d94d8a43cbc9d4511a8f45a6a..e0face3d7a0d82fc4a8ee9c235d1cd1053a167be 100644 (file)
--- a/lily/arpeggio-engraver.cc
+++ b/lily/arpeggio-engraver.cc
@@ -1,19 +1,33 @@
 /*
-  arpeggio-engraver.cc -- implement Arpeggio_engraver
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2000--2015 Jan Nieuwenhuizen <janneke@gnu.org>
 
-  (c) 2000--2005 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 "engraver.hh"
 
-#include "pointer-group-interface.hh"
 #include "arpeggio.hh"
-#include "stem.hh"
+#include "item.hh"
+#include "note-column.hh"
+#include "pointer-group-interface.hh"
 #include "rhythmic-head.hh"
+#include "separation-item.hh"
 #include "side-position-interface.hh"
-#include "note-column.hh"
+#include "stem.hh"
+#include "stream-event.hh"
 
 #include "translator.icc"
 
@@ -25,27 +39,26 @@ public:
   void acknowledge_stem (Grob_info);
   void acknowledge_rhythmic_head (Grob_info);
   void acknowledge_note_column (Grob_info);
+
 protected:
   void process_music ();
   void stop_translation_timestep ();
-  virtual bool try_music (Music *);
+  void listen_arpeggio (Stream_event *);
 private:
   Item *arpeggio_;
-  Music *arpeggio_event_;
+  Stream_event *arpeggio_event_;
 };
 
-Arpeggio_engraver::Arpeggio_engraver ()
+Arpeggio_engraver::Arpeggio_engraver (Context *c)
+  : Engraver (c)
 {
   arpeggio_ = 0;
   arpeggio_event_ = 0;
 }
 
-bool
-Arpeggio_engraver::try_music (Music *m)
+void Arpeggio_engraver::listen_arpeggio (Stream_event *ev)
 {
-  if (!arpeggio_event_)
-    arpeggio_event_ = m;
-  return true;
+  ASSIGN_EVENT_ONCE (arpeggio_event_, ev);
 }
 
 void
@@ -54,11 +67,11 @@ Arpeggio_engraver::acknowledge_stem (Grob_info info)
   if (arpeggio_)
     {
       if (!arpeggio_->get_parent (Y_AXIS))
-       arpeggio_->set_parent (info.grob (), Y_AXIS);
+        arpeggio_->set_parent (info.grob (), Y_AXIS);
 
       Pointer_group_interface::add_grob (arpeggio_,
-                                        ly_symbol2scm ("stems"),
-                                        info.grob ());
+                                         ly_symbol2scm ("stems"),
+                                         info.grob ());
     }
 }
 void
@@ -77,14 +90,16 @@ void
 Arpeggio_engraver::acknowledge_note_column (Grob_info info)
 {
   if (arpeggio_)
-    info.grob ()->set_object ("arpeggio", arpeggio_->self_scm ());
+    Separation_item::add_conditional_item (info.grob (), arpeggio_);
 }
 
 void
 Arpeggio_engraver::process_music ()
 {
   if (arpeggio_event_)
-    arpeggio_ = make_item ("Arpeggio", arpeggio_event_->self_scm ());
+    {
+      arpeggio_ = make_item ("Arpeggio", arpeggio_event_->self_scm ());
+    }
 }
 
 void
@@ -94,13 +109,26 @@ Arpeggio_engraver::stop_translation_timestep ()
   arpeggio_event_ = 0;
 }
 
-ADD_ACKNOWLEDGER (Arpeggio_engraver, stem)
-  ADD_ACKNOWLEDGER (Arpeggio_engraver, rhythmic_head)
-  ADD_ACKNOWLEDGER (Arpeggio_engraver, note_column)
 
-  ADD_TRANSLATOR (Arpeggio_engraver,
-                 /* doc */ "Generate an Arpeggio symbol",
-                 /* create */ "Arpeggio",
-                 /* accept */ "arpeggio-event",
-                 /* read */ "",
-                 /* write */ "");
+void
+Arpeggio_engraver::boot ()
+{
+  ADD_LISTENER (Arpeggio_engraver, arpeggio);
+  ADD_ACKNOWLEDGER (Arpeggio_engraver, stem);
+  ADD_ACKNOWLEDGER (Arpeggio_engraver, rhythmic_head);
+  ADD_ACKNOWLEDGER (Arpeggio_engraver, note_column);
+}
+
+ADD_TRANSLATOR (Arpeggio_engraver,
+                /* doc */
+                "Generate an Arpeggio symbol.",
+
+                /* create */
+                "Arpeggio",
+
+                /* read */
+                "",
+
+                /* write */
+                ""
+               );