diff -r 000000000000 -r 6474c204b198 content/xul/templates/public/nsIXULSortService.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/xul/templates/public/nsIXULSortService.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+interface nsIDOMNode;
+
+/**
+ * A service used to sort the contents of a XUL widget.
+ */
+[scriptable, uuid(F29270C8-3BE5-4046-9B57-945A84DFF132)]
+interface nsIXULSortService : nsISupports
+{
+    const unsigned long SORT_COMPARECASE = 0x0001;
+    const unsigned long SORT_INTEGER = 0x0100;
+
+    /**
+     * Sort the contents of the widget containing <code>aNode</code>
+     * using <code>aSortKey</code> as the comparison key, and
+     * <code>aSortDirection</code> as the direction.
+     *
+     * @param aNode A node in the XUL widget whose children are to be sorted.
+     * @param aSortKey The value to be used as the comparison key.
+     * @param aSortHints One or more hints as to how to sort:
+     *
+     *   ascending: to sort the contents in ascending order
+     *   descending: to sort the contents in descending order
+     *   comparecase: perform case sensitive comparisons
+     *   integer: treat values as integers, non-integers are compared as strings
+     *   twostate: don't allow the natural (unordered state)
+     */
+    void sort(in nsIDOMNode aNode,
+              in AString aSortKey,
+              in AString aSortHints);
+};
+
+%{C++
+nsresult
+NS_NewXULSortService(nsIXULSortService **result);
+%}