+LY_DEFINE (ly_grob_alist_chain, "ly:grob-alist-chain",
+ 1, 1, 0, (SCM grob, SCM global),
+ "Get an alist chain for grob @var{grob}, with @var{global} as"
+ " the global default. If unspecified, @code{font-defaults}"
+ " from the layout block is taken.")
+{
+ Grob *sc = unsmob_grob (grob);
+
+ LY_ASSERT_SMOB (Grob, grob, 1);
+
+ if (global == SCM_UNDEFINED)
+ {
+ global = sc->layout ()->lookup_variable (ly_symbol2scm ("font-defaults"));
+ if (global == SCM_UNDEFINED)
+ global = SCM_EOL;
+ }
+
+ return sc->get_property_alist_chain (global);
+}
+
+LY_DEFINE (ly_grob_extent, "ly:grob-extent",
+ 3, 0, 0, (SCM grob, SCM refp, SCM axis),
+ "Get the extent in @var{axis} direction of @var{grob} relative to"
+ " the grob @var{refp}.")
+{
+ Grob *sc = unsmob_grob (grob);
+ Grob *ref = unsmob_grob (refp);
+
+
+ LY_ASSERT_SMOB (Grob, grob, 1);
+ LY_ASSERT_SMOB (Grob, refp, 2);
+ LY_ASSERT_TYPE (is_axis, axis, 3);
+
+ Axis a = Axis (scm_to_int (axis));
+
+
+ if (ref->common_refpoint (sc, a) != ref)
+ {
+ // ugh. should use other error message
+ SCM_ASSERT_TYPE (false, refp, SCM_ARG2, __FUNCTION__, "common refpoint");
+ }
+ return ly_interval2scm (sc->extent (ref, a));
+}