X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Foutput-property-engraver.cc;h=ee17d82b079010f86633d12f0cd7bd07ad108851;hb=a54fef48345564ae701839c525379939c840638d;hp=f022bf56d7a072ae7c72c7a2a0096b184ac7347e;hpb=75f8a001fe30f30fa2d32a961218d0f1cdbeeb7e;p=lilypond.git

diff --git a/lily/output-property-engraver.cc b/lily/output-property-engraver.cc
index f022bf56d7..ee17d82b07 100644
--- a/lily/output-property-engraver.cc
+++ b/lily/output-property-engraver.cc
@@ -3,32 +3,19 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 2000--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 
 #include "engraver.hh"
 #include "grob.hh"
-#include "output-property-music-iterator.hh"
+#include "context.hh"
+
 
 class Output_property_engraver : public Engraver
 {
-public:
-  VIRTUAL_COPY_CONS (Translator);
+TRANSLATOR_DECLARATIONS(Output_property_engraver);
 protected:
-
-  /*
-    should do this with \once and \push ?
-
-
-      \property Voice.outputProperties \push #pred = #modifier
-
-      where both MODIFIER and PRED are functions taking a
-      grob.
-      
-   */
-
-  
   Link_array<Music> props_;
 
   virtual void stop_translation_timestep ();
@@ -40,8 +27,7 @@ protected:
 bool
 Output_property_engraver::try_music (Music* m)
 {
-  if (m->get_mus_property ("iterator-ctor") ==
-      Output_property_music_iterator::constructor_cxx_function)
+  if (m->is_mus_type ("layout-instruction"))
     {
       props_.push (m);
       return true;
@@ -55,18 +41,36 @@ Output_property_engraver::acknowledge_grob (Grob_info inf)
   for (int i=props_.size (); i--;)
     {
       Music * o = props_[i];
-      SCM pred = o->get_mus_property ("predicate");
-      
-      /*
-	should typecheck pred. 
-       */
-      SCM result=gh_apply (pred,
-			   scm_list_n (inf.elem_l_->self_scm (), SCM_UNDEFINED));
-      if (to_boolean (result))
+      SCM pred = o->get_property ("predicate");
+
+
+
+      if (gh_procedure_p (pred))
+	{
+	  /*
+	    should typecheck pred. 
+	  */
+	  SCM result=scm_call_1 (pred, inf.grob_->self_scm ());
+	  if (to_boolean (result))
+	    {
+	      SCM sym = o->get_property ("grob-property");
+	      SCM val = o->get_property ("grob-value");
+	      inf.grob_->internal_set_property (sym, val);
+	    }
+	}
+      else
 	{
-	  SCM sym = o->get_mus_property ("grob-property");
-	  SCM val = o->get_mus_property ("grob-value");
-	  inf.elem_l_->set_grob_property (sym, val);
+	  Context * d =
+	    dynamic_cast<Context *> (inf.origin_trans_);
+
+	  if (!d)
+	    d = dynamic_cast<Context *> (inf.origin_trans_->daddy_context_);
+	  
+	  SCM proc = o->get_property ("procedure");
+	  scm_call_3 (proc,
+		      inf.grob_->self_scm(),
+		      d->self_scm(), 
+		      daddy_context_->self_scm());
 	}
     }
 }
@@ -77,4 +81,15 @@ Output_property_engraver::stop_translation_timestep ()
   props_.clear ();
 }
 
-ADD_THIS_TRANSLATOR (Output_property_engraver);
+Output_property_engraver::Output_property_engraver()
+{
+}
+
+ENTER_DESCRIPTION(Output_property_engraver,
+/* descr */       "Interpret Music of Output_property type, and apply a function "
+" to any Graphic objects that satisfies the predicate.",
+/* creats*/       "",
+/* accepts */     "layout-instruction",
+/* acks  */       "grob-interface",
+/* reads */       "",
+/* write */       "");