-/*
- group-interface.cc -- implement Pointer_group_interface
-
+/*
+ pointer-group-interface.cc -- implement Pointer_group_interface
+
source file of the GNU LilyPond music typesetter
-
- (c) 1999--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
-#include "group-interface.hh"
+
+ (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+*/
+
+#include "pointer-group-interface.hh"
+
+#include "lily-proto.hh"
+#include "item.hh"
+#include "grob-array.hh"
#include "grob.hh"
+int
+Pointer_group_interface::count (Grob *me, SCM sym)
+{
+ Grob_array *arr = unsmob_grob_array (me->internal_get_object (sym));
+ return arr ? arr->size() : 0;
+}
+
+void
+Pointer_group_interface::add_grob (Grob *me, SCM sym, SCM p)
+{
+ add_grob (me, sym, unsmob_grob (p));
+}
+
+void
+Pointer_group_interface::add_grob (Grob *me, SCM sym, Grob *p)
+{
+ SCM scm_arr = me->internal_get_object (sym);
+ Grob_array *arr = unsmob_grob_array (scm_arr);
+ if (!arr)
+ {
+ scm_arr = Grob_array::make_array ();
+ arr = unsmob_grob_array (scm_arr);
+ me->internal_set_object (sym, scm_arr);
+ }
+ arr->add (p);
+}
+
+static Link_array<Grob> empty_array;
+
+Link_array<Grob> const &
+ly_scm2link_array (SCM x)
+{
+ Grob_array *arr = unsmob_grob_array (x);
+ return arr ? arr->array () : empty_array;
+}
+
+Link_array<Grob> const &
+internal_extract_grob_array (Grob const *elt, SCM symbol)
+{
+ return ly_scm2link_array (elt->internal_get_object (symbol));
+}
+Link_array<Item>
+internal_extract_item_array (Grob const *elt, SCM symbol)
+{
+ Grob_array *arr = unsmob_grob_array (elt->internal_get_object (symbol));
+ Link_array<Item> items;
+ for (int i = 0; arr && i < arr->size (); i++)
+ {
+ items.push (arr->item (i));
+ }
+ return items;
+}