Doc-es: various updates.

[lilypond.git] / lily / output-property-engraver.cc

diff --git a/lily/output-property-engraver.cc b/lily/output-property-engraver.cc
index d7f075d32196eb2a502fd4fc4410040b81465223..ccef5051f111403bc87cd5f9bf77ca23f403ff60 100644 (file)
--- a/lily/output-property-engraver.cc
+++ b/lily/output-property-engraver.cc
@@ -1,11 +1,21 @@
-/*   
-  output-property-engraver.cc -- implement Output_property_engraver
-  
-  source file of the GNU LilyPond music typesetter
-  
-  (c) 2000--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
-  
- */
+/*
+  This file is part of LilyPond, the GNU music typesetter.
+
+  Copyright (C) 2000--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+  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 "context.hh"
@@ -21,22 +31,18 @@ class Output_property_engraver : public Engraver
 protected:
   vector<Stream_event*> props_;
   
-  DECLARE_ACKNOWLEDGER (grob);
-  DECLARE_TRANSLATOR_LISTENER (apply_output);
+  void acknowledge_grob (Grob_info);
+  void listen_apply_output (Stream_event *);
 
   void stop_translation_timestep ();
 };
 
-IMPLEMENT_TRANSLATOR_LISTENER (Output_property_engraver, apply_output);
+// We only run this in the Score context, so all events are likely to
+// find a target
 void
 Output_property_engraver::listen_apply_output (Stream_event *ev)
 {
-  /*
-    UGH. Only swallow the output property event in the context
-    it was intended for. This is inelegant but not inefficient.
-  */
-  if (context ()->is_alias (ev->get_property ("context-type")))
-    props_.push_back (ev);
+  props_.push_back (ev);
 }
 
 void
@@ -46,11 +52,20 @@ Output_property_engraver::acknowledge_grob (Grob_info inf)
     {
       Stream_event *o = props_[i];
       Context *d = inf.context ();
+      SCM grob = o->get_property ("symbol");
+      if (scm_is_symbol (grob)
+          && ly_symbol2string (grob) != inf.grob ()->name ())
+        continue;
+      SCM typ = o->get_property ("context-type");
       SCM proc = o->get_property ("procedure");
-      scm_call_3 (proc,
-                 inf.grob ()->self_scm (),
-                 d->self_scm (), 
-                 context ()->self_scm ());
+      for (Context *c = d; c; c = c->get_parent_context ())
+        {
+          if (c->is_alias (typ))
+            scm_call_3 (proc,
+                        inf.grob ()->self_scm (),
+                        d->self_scm (),
+                        c->self_scm ());
+        }
     }
 }
 
@@ -60,11 +75,18 @@ Output_property_engraver::stop_translation_timestep ()
   props_.clear ();
 }
 
-Output_property_engraver::Output_property_engraver ()
+Output_property_engraver::Output_property_engraver (Context *c)
+  : Engraver (c)
+{
+}
+
+void
+Output_property_engraver::boot ()
 {
+  ADD_LISTENER (Output_property_engraver, apply_output);
+  ADD_ACKNOWLEDGER (Output_property_engraver, grob);
 }
 
-ADD_ACKNOWLEDGER (Output_property_engraver, grob);
 ADD_TRANSLATOR (Output_property_engraver,
                /* doc */
                "Apply a procedure to any grob acknowledged.",