X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Foutput-property-engraver.cc;h=ccef5051f111403bc87cd5f9bf77ca23f403ff60;hb=fbe9dcd2e44caaf188782af4d6bd89e4d1ba86d8;hp=ebbb40b6b62c5987ba1cdf60a61edda5ece3839c;hpb=0af2486a28f1c60b9de929a9101964d880927e54;p=lilypond.git

diff --git a/lily/output-property-engraver.cc b/lily/output-property-engraver.cc
index ebbb40b6b6..ccef5051f1 100644
--- a/lily/output-property-engraver.cc
+++ b/lily/output-property-engraver.cc
@@ -1,66 +1,102 @@
-/*   
-  output-property-engraver.cc --  implement Output_property_engraver
-  
-  source file of the GNU LilyPond music typesetter
-  
-  (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.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 "output-property.hh"
 #include "engraver.hh"
-#include "score-element.hh"
+#include "context.hh"
+#include "grob.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
+
 
 class Output_property_engraver : public Engraver
 {
-public:
-  VIRTUAL_COPY_CONS(Translator);
+  TRANSLATOR_DECLARATIONS (Output_property_engraver);
 protected:
+  vector<Stream_event*> props_;
   
-  Link_array<Output_property> props_;
+  void acknowledge_grob (Grob_info);
+  void listen_apply_output (Stream_event *);
 
-  virtual void do_pre_move_processing ();
-  virtual void acknowledge_element (Score_element_info);
-  virtual bool do_try_music (Music*);
+  void stop_translation_timestep ();
 };
 
-
-bool
-Output_property_engraver::do_try_music (Music* m)
+// 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)
 {
-  if (Output_property * o = dynamic_cast<Output_property*> (m))
-    {
-      props_.push (o);
-      return true;
-    }
-  return false;
+  props_.push_back (ev);
 }
 
 void
-Output_property_engraver::acknowledge_element (Score_element_info inf)
+Output_property_engraver::acknowledge_grob (Grob_info inf)
 {
-  for (int i=props_.size (); i--; )
+  for (vsize i = props_.size (); i--;)
     {
-      Output_property * o = props_[i];
-      SCM pred = gh_car (o->pred_sym_val_list_);
-      
-      /*
-	should typecheck pred. 
-       */
-      SCM result=gh_apply (pred,
-			   gh_list (inf.elem_l_->self_scm_, SCM_UNDEFINED));
-      if (to_boolean (result))
-	{
-	  inf.elem_l_->set_elt_property (gh_cadr (o->pred_sym_val_list_),
-					 gh_caddr (o->pred_sym_val_list_));
-	}
+      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");
+      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 ());
+        }
     }
 }
 
 void
-Output_property_engraver::do_pre_move_processing ()
+Output_property_engraver::stop_translation_timestep ()
 {
   props_.clear ();
 }
 
-ADD_THIS_TRANSLATOR(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_TRANSLATOR (Output_property_engraver,
+		/* doc */
+		"Apply a procedure to any grob acknowledged.",
+		
+		/* create */
+		"",
+		
+		/* read */
+		"",
+		
+		/* write */
+		""
+		);