doc patch by Graham Percival

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

diff --git a/lily/output-property-engraver.cc b/lily/output-property-engraver.cc
index d12b6530fc1123902c720f576cb034fe6b223a11..cfdf4f32a2e8f69544de86c0c51837a942aac0d5 100644 (file)
--- a/lily/output-property-engraver.cc
+++ b/lily/output-property-engraver.cc
@@ -3,7 +3,7 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 
@@ -13,8 +13,7 @@
 
 class Output_property_engraver : public Engraver
 {
-public:
-  VIRTUAL_COPY_CONS(Translator);
+TRANSLATOR_DECLARATIONS(Output_property_engraver);
 protected:
 
   /*
@@ -40,8 +39,7 @@ protected:
 bool
 Output_property_engraver::try_music (Music* m)
 {
-  if (m->get_mus_property ("type") ==
-      Output_property_music_iterator::constructor_cxx_function)
+  if (m->is_mus_type ("layout-instruction"))
     {
       props_.push (m);
       return true;
@@ -52,7 +50,7 @@ Output_property_engraver::try_music (Music* m)
 void
 Output_property_engraver::acknowledge_grob (Grob_info inf)
 {
-  for (int i=props_.size (); i--; )
+  for (int i=props_.size (); i--;)
     {
       Music * o = props_[i];
       SCM pred = o->get_mus_property ("predicate");
@@ -61,12 +59,12 @@ Output_property_engraver::acknowledge_grob (Grob_info inf)
        should typecheck pred. 
        */
       SCM result=gh_apply (pred,
-                          gh_list (inf.elem_l_->self_scm (), SCM_UNDEFINED));
+                          scm_list_n (inf.grob_->self_scm (), SCM_UNDEFINED));
       if (to_boolean (result))
        {
-         SCM sym = o->get_mus_property ("symbol");
-         SCM val = o->get_mus_property ("value");
-         inf.elem_l_->set_grob_property (sym, val);
+         SCM sym = o->get_mus_property ("grob-property");
+         SCM val = o->get_mus_property ("grob-value");
+         inf.grob_->internal_set_grob_property (sym, val);
        }
     }
 }
@@ -77,4 +75,15 @@ 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 */       "");