Implement the MozMap type.

Fixes #13144.

1 files changed, 17 insertions, 0 deletions

diff --git a/components/script/dom/bindings/conversions.rs b/components/script/dom/bindings/conversions.rs
index bb29b9904a1..55c3c41f460 100644
--- a/components/script/dom/bindings/conversions.rs
+++ b/components/script/dom/bindings/conversions.rs
@@ -44,6 +44,7 @@ pub use js::conversions::ConversionBehavior;
 use js::conversions::latin1_to_string;
 use js::error::throw_type_error;
 use js::glue::{GetProxyPrivate, IsWrapper};
+use js::glue::{RUST_JSID_IS_INT, RUST_JSID_TO_INT};
 use js::glue::{RUST_JSID_IS_STRING, RUST_JSID_TO_STRING, UnwrapObject};
 use js::jsapi::{HandleId, HandleObject, HandleValue, JSClass, JSContext};
 use js::jsapi::{JSObject, JSString, JS_GetArrayBufferViewType, JS_GetClass};
@@ -129,6 +130,22 @@ pub fn string_jsid_to_string(cx: *mut JSContext, id: HandleId) -> DOMString {
     }
 }
 
+/// Convert `id` to a `DOMString`. Returns `None` if `id` is not a string or
+/// integer.
+///
+/// Handling of invalid UTF-16 in strings depends on the relevant option.
+pub unsafe fn jsid_to_string(cx: *mut JSContext, id: HandleId) -> Option<DOMString> {
+    if RUST_JSID_IS_STRING(id) {
+        return Some(jsstring_to_str(cx, RUST_JSID_TO_STRING(id)));
+    }
+
+    if RUST_JSID_IS_INT(id) {
+        return Some(RUST_JSID_TO_INT(id).to_string().into());
+    }
+
+    None
+}
+
 // http://heycam.github.io/webidl/#es-USVString
 impl ToJSValConvertible for USVString {
     unsafe fn to_jsval(&self, cx: *mut JSContext, rval: MutableHandleValue) {