1 files changed, 42 insertions, 0 deletions
diff --git a/src/components/script/dom/bindings/conversions.rs b/src/components/script/dom/bindings/conversions.rs
new file mode 100644
index 00000000000..7350427a95e
--- /dev/null
+++ b/src/components/script/dom/bindings/conversions.rs
@@ -0,0 +1,42 @@
+/* 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/. */
+
+use js::jsapi::JSVal;
+use js::{JSVAL_FALSE, JSVAL_TRUE};
+use js::glue::bindgen::{RUST_UINT_TO_JSVAL, RUST_JSVAL_TO_INT};
+
+pub trait JSValConvertible {
+    fn to_jsval(&self) -> JSVal;
+    fn from_jsval(val: JSVal) -> Option<Self>;
+}
+
+impl JSValConvertible for u32 {
+    fn to_jsval(&self) -> JSVal {
+        RUST_UINT_TO_JSVAL(*self)
+    }
+
+    fn from_jsval(val: JSVal) -> Option<u32> {
+        Some(RUST_JSVAL_TO_INT(val) as u32)
+    }
+}
+
+impl JSValConvertible for bool {
+    fn to_jsval(&self) -> JSVal {
+        if *self {
+            JSVAL_TRUE
+        } else {
+            JSVAL_FALSE
+        }
+    }
+
+    fn from_jsval(val: JSVal) -> Option<bool> {
+        if val == JSVAL_TRUE {
+            Some(true)
+        } else if val == JSVAL_FALSE {
+            Some(false)
+        } else {
+            None
+        }
+    }
+}
+\ No newline at end of file