1 files changed, 69 insertions, 0 deletions
diff --git a/components/script/dom/messagechannel.rs b/components/script/dom/messagechannel.rs
new file mode 100644
index 00000000000..3075dac3088
--- /dev/null
+++ b/components/script/dom/messagechannel.rs
@@ -0,0 +1,69 @@
+/* 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 crate::dom::bindings::codegen::Bindings::MessageChannelBinding::MessageChannelMethods;
+use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::messageport::MessagePort;
+use dom_struct::dom_struct;
+
+#[dom_struct]
+pub struct MessageChannel {
+    reflector_: Reflector,
+    port1: Dom<MessagePort>,
+    port2: Dom<MessagePort>,
+}
+
+impl MessageChannel {
+    /// <https://html.spec.whatwg.org/multipage/#dom-messagechannel>
+    #[allow(non_snake_case)]
+    pub fn Constructor(global: &GlobalScope) -> DomRoot<MessageChannel> {
+        MessageChannel::new(global)
+    }
+
+    /// <https://html.spec.whatwg.org/multipage/#dom-messagechannel>
+    pub fn new(incumbent: &GlobalScope) -> DomRoot<MessageChannel> {
+        // Step 1
+        let port1 = MessagePort::new(&incumbent);
+
+        // Step 2
+        let port2 = MessagePort::new(&incumbent);
+
+        incumbent.track_message_port(&*port1, None);
+        incumbent.track_message_port(&*port2, None);
+
+        // Step 3
+        incumbent.entangle_ports(
+            port1.message_port_id().clone(),
+            port2.message_port_id().clone(),
+        );
+
+        // Steps 4-6
+        reflect_dom_object(
+            Box::new(MessageChannel::new_inherited(&*port1, &*port2)),
+            incumbent,
+        )
+    }
+
+    pub fn new_inherited(port1: &MessagePort, port2: &MessagePort) -> MessageChannel {
+        MessageChannel {
+            reflector_: Reflector::new(),
+            port1: Dom::from_ref(port1),
+            port2: Dom::from_ref(port2),
+        }
+    }
+}
+
+impl MessageChannelMethods for MessageChannel {
+    /// <https://html.spec.whatwg.org/multipage/#dom-messagechannel-port1>
+    fn Port1(&self) -> DomRoot<MessagePort> {
+        DomRoot::from_ref(&*self.port1)
+    }
+
+    /// <https://html.spec.whatwg.org/multipage/#dom-messagechannel-port2>
+    fn Port2(&self) -> DomRoot<MessagePort> {
+        DomRoot::from_ref(&*self.port2)
+    }
+}