* flower

[lilypond.git] / lily / group-interface.cc

diff --git a/lily/group-interface.cc b/lily/group-interface.cc
index 90dfdebd91158831807dab95ec3fedd4941bc582..9fbd329e7cf15aacabab9acdca993c4f0a81a57b 100644 (file)
--- a/lily/group-interface.cc
+++ b/lily/group-interface.cc
@@ -1,30 +1,57 @@
-/*   
-  group-interface.cc --  implement Group_interface
-  
+/*
+  group-interface.cc -- implement Group_interface
+
   source file of the GNU LilyPond music typesetter
-  
-  (c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-  
- */
+
+  (c) 1999--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
 
 #include "group-interface.hh"
+#include "item.hh"
 
 void
-Group_interface::add_thing (Grob*me, SCM sym, SCM thing)
+Group_interface::add_thing (Grob *me, SCM sym, SCM thing)
 {
   me->add_to_list_property (sym, thing);
 }
 
-
 int
 Group_interface::count (Grob *me, SCM sym)
 {
   return scm_ilength (me->internal_get_property (sym));
 }
 
-
 void
-Pointer_group_interface::add_grob (Grob*me, SCM name, Grob*p) 
+Pointer_group_interface::add_grob (Grob *me, SCM name, Grob *p)
 {
   Group_interface::add_thing (me, name, p->self_scm ());
 }
+
+Link_array<Grob>
+extract_grob_array (Grob const *elt, SCM symbol)
+{
+  Link_array<Grob> arr;
+
+  for (SCM s = elt->internal_get_property (symbol); scm_is_pair (s); s = scm_cdr (s))
+    {
+      SCM e = scm_car (s);
+      arr.push (unsmob_grob (e));
+    }
+
+  arr.reverse ();
+  return arr;
+}
+
+Link_array<Item>
+extract_item_array (Grob const *elt, SCM symbol)
+{
+  Link_array<Item> arr;
+  for (SCM s = elt->internal_get_property (symbol); scm_is_pair (s); s = scm_cdr (s))
+    {
+      SCM e = scm_car (s);
+      arr.push (dynamic_cast<Item *> (unsmob_grob (e)));
+    }
+
+  arr.reverse ();
+  return arr;
+}