From 3a5a56807abc19e84ea241d346f80d3a5cba31a7 Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Fri, 24 Jun 2016 16:39:44 +0530
Subject: [PATCH] Add iterators for nsStyleAutoArray

---
 ports/geckolib/gecko_bindings/sugar/mod.rs    |  1 +
 .../sugar/ns_style_auto_array.rs              | 21 +++++++++++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 ports/geckolib/gecko_bindings/sugar/ns_style_auto_array.rs

diff --git a/ports/geckolib/gecko_bindings/sugar/mod.rs b/ports/geckolib/gecko_bindings/sugar/mod.rs
index 17d1e9209c2..9c1e4637249 100644
--- a/ports/geckolib/gecko_bindings/sugar/mod.rs
+++ b/ports/geckolib/gecko_bindings/sugar/mod.rs
@@ -2,4 +2,5 @@
  * 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/. */
 
+mod ns_style_auto_array;
 mod ns_t_array;
diff --git a/ports/geckolib/gecko_bindings/sugar/ns_style_auto_array.rs b/ports/geckolib/gecko_bindings/sugar/ns_style_auto_array.rs
new file mode 100644
index 00000000000..bfcd7dc3cef
--- /dev/null
+++ b/ports/geckolib/gecko_bindings/sugar/ns_style_auto_array.rs
@@ -0,0 +1,21 @@
+use std::iter::{once, Chain, Once, IntoIterator};
+use std::slice::{IterMut};
+use structs::nsStyleAutoArray;
+
+impl<T> nsStyleAutoArray<T> {
+    pub fn iter_mut(&mut self) -> Chain<Once<&mut T>, IterMut<T>> {
+        once(&mut self.mFirstElement).chain(self.mOtherElements.iter_mut())
+    }
+
+    pub fn len(&self) -> usize {
+        1 + self.mOtherElements.len()
+    }
+}
+
+impl<'a, T> IntoIterator for &'a mut nsStyleAutoArray<T> {
+    type Item = &'a mut T;
+    type IntoIter = Chain<Once<&'a mut T>, IterMut<'a, T>>;
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter_mut()
+    } 
+}
\ No newline at end of file