Implement WebIDL namespaces

components/script/dom/bindings/namespace.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/. */
+
+//! Machinery to initialise namespace objects.
+
+use dom::bindings::guard::Guard;
+use dom::bindings::interface::{create_object, define_on_global_object};
+use js::jsapi::{HandleObject, JSClass, JSContext, JSFunctionSpec, MutableHandleObject};
+use libc;
+use std::ptr;
+
+/// The class of a namespace object.
+#[derive(Copy, Clone)]
+pub struct NamespaceObjectClass(JSClass);
+
+unsafe impl Sync for NamespaceObjectClass {}
+
+impl NamespaceObjectClass {
+    /// Create a new `NamespaceObjectClass` structure.
+    pub const unsafe fn new(name: &'static [u8]) -> Self {
+        NamespaceObjectClass(JSClass {
+            name: name as *const _ as *const libc::c_char,
+            flags: 0,
+            cOps: ptr::null_mut(),
+            reserved: [ptr::null_mut(); 3],
+        })
+    }
+}
+
+/// Create a new namespace object.
+pub unsafe fn create_namespace_object(
+        cx: *mut JSContext,
+        global: HandleObject,
+        proto: HandleObject,
+        class: &'static NamespaceObjectClass,
+        methods: &[Guard<&'static [JSFunctionSpec]>],
+        name: &[u8],
+        rval: MutableHandleObject) {
+    create_object(cx, proto, &class.0, methods, &[], &[], rval);
+    define_on_global_object(cx, global, name, rval.handle());
+}