Add gtk_editable_get_delegate

We need access to the delegate in the a11y layer,
so we might as well make this function public.

docs/reference/gtk/gtk4-sections.txt

@@ -971,6 +971,7 @@ gtk_editable_get_enable_undo
 gtk_editable_set_enable_undo
 <SUBSECTION>
 gtk_editable_install_properties
+gtk_editable_get_delegate
 gtk_editable_init_delegate
 gtk_editable_finish_delegate
 gtk_editable_delegate_set_property

gtk/gtkeditable.c

@@ -941,6 +941,21 @@ delegate_notify (GObject    *object,
     g_object_notify (data, pspec->name);
 }
 
+/**
+ * gtk_editable_get_delegate:
+ * @editable: a #GtkEditable
+ *
+ * Gets the #GtkEditable that @editable is delegating its
+ * implementation to. Typically, the delegate is a #GtkText widget.
+ *
+ * Returns: (nullable) (transfer none): the delegate #GtkEditable
+ */
+GtkEditable *
+gtk_editable_get_delegate (GtkEditable *editable)
+{
+  return get_delegate (editable);
+}
+
 /**
  * gtk_editable_init_delegate:
  * @editable: a #GtkEditable

gtk/gtkeditable.h

@@ -162,6 +162,8 @@ GDK_AVAILABLE_IN_ALL
 guint        gtk_editable_install_properties    (GObjectClass *object_class,
                                                  guint         first_prop);
 GDK_AVAILABLE_IN_ALL
+GtkEditable *gtk_editable_get_delegate          (GtkEditable *editable);
+GDK_AVAILABLE_IN_ALL
 void         gtk_editable_init_delegate         (GtkEditable  *editable);
 GDK_AVAILABLE_IN_ALL
 void         gtk_editable_finish_delegate       (GtkEditable  *editable);