From 951d35902c8d160441478126a32a0723c11278f1 Mon Sep 17 00:00:00 2001
From: Ms2ger <ms2ger@gmail.com>
Date: Fri, 14 Feb 2014 13:20:48 +0100
Subject: [PATCH] Add str.rs.

---
 src/components/util/str.rs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 src/components/util/str.rs

diff --git a/src/components/util/str.rs b/src/components/util/str.rs
new file mode 100644
index 00000000000..13272d8ec42
--- /dev/null
+++ b/src/components/util/str.rs
@@ -0,0 +1,21 @@
+/* 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/. */
+
+pub type DOMString = ~str;
+
+pub fn null_str_as_empty(s: &Option<DOMString>) -> DOMString {
+    // We don't use map_default because it would allocate ~"" even for Some.
+    match *s {
+        Some(ref s) => s.clone(),
+        None => ~""
+    }
+}
+
+pub fn null_str_as_empty_ref<'a>(s: &'a Option<DOMString>) -> &'a str {
+    match *s {
+        Some(ref s) => s.as_slice(),
+        None => &'a ""
+    }
+}
+