Add RTCTrackEvent

3 files changed, 102 insertions, 0 deletions

diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index 576c288d6f4..00274c3b86b 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -451,6 +451,7 @@ pub mod rtcicecandidate;
 pub mod rtcpeerconnection;
 pub mod rtcpeerconnectioniceevent;
 pub mod rtcsessiondescription;
+pub mod rtctrackevent;
 pub mod screen;
 pub mod serviceworker;
 pub mod serviceworkercontainer;
diff --git a/components/script/dom/rtctrackevent.rs b/components/script/dom/rtctrackevent.rs
new file mode 100644
index 00000000000..9c5d7bec362
--- /dev/null
+++ b/components/script/dom/rtctrackevent.rs
@@ -0,0 +1,78 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::codegen::Bindings::EventBinding::EventBinding::EventMethods;
+use crate::dom::bindings::codegen::Bindings::RTCTrackEventBinding::{self, RTCTrackEventMethods};
+use crate::dom::bindings::error::Fallible;
+use crate::dom::bindings::inheritance::Castable;
+use crate::dom::bindings::reflector::{reflect_dom_object, DomObject};
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::bindings::str::DOMString;
+use crate::dom::event::Event;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::mediastreamtrack::MediaStreamTrack;
+use crate::dom::window::Window;
+use dom_struct::dom_struct;
+use servo_atoms::Atom;
+
+#[dom_struct]
+pub struct RTCTrackEvent {
+    event: Event,
+    track: Dom<MediaStreamTrack>,
+}
+
+impl RTCTrackEvent {
+    #[allow(unrooted_must_root)]
+    fn new_inherited(track: &MediaStreamTrack) -> RTCTrackEvent {
+        RTCTrackEvent {
+            event: Event::new_inherited(),
+            track: Dom::from_ref(track),
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        type_: Atom,
+        bubbles: bool,
+        cancelable: bool,
+        track: &MediaStreamTrack,
+    ) -> DomRoot<RTCTrackEvent> {
+        let trackevent = reflect_dom_object(
+            Box::new(RTCTrackEvent::new_inherited(&track)),
+            global,
+            RTCTrackEventBinding::Wrap,
+        );
+        {
+            let event = trackevent.upcast::<Event>();
+            event.init_event(type_, bubbles, cancelable);
+        }
+        trackevent
+    }
+
+    pub fn Constructor(
+        window: &Window,
+        type_: DOMString,
+        init: &RTCTrackEventBinding::RTCTrackEventInit,
+    ) -> Fallible<DomRoot<RTCTrackEvent>> {
+        Ok(RTCTrackEvent::new(
+            &window.global(),
+            Atom::from(type_),
+            init.parent.bubbles,
+            init.parent.cancelable,
+            &init.track,
+        ))
+    }
+}
+
+impl RTCTrackEventMethods for RTCTrackEvent {
+    // https://w3c.github.io/webrtc-pc/#dom-rtctrackevent-track
+    fn Track(&self) -> DomRoot<MediaStreamTrack> {
+        DomRoot::from_ref(&*self.track)
+    }
+
+    // https://dom.spec.whatwg.org/#dom-event-istrusted
+    fn IsTrusted(&self) -> bool {
+        self.event.IsTrusted()
+    }
+}
diff --git a/components/script/dom/webidls/RTCTrackEvent.webidl b/components/script/dom/webidls/RTCTrackEvent.webidl
new file mode 100644
index 00000000000..6eafd2a514e
--- /dev/null
+++ b/components/script/dom/webidls/RTCTrackEvent.webidl
@@ -0,0 +1,23 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/webrtc-pc/#dom-rtctrackevent
+
+[Constructor(DOMString type, RTCTrackEventInit eventInitDict),
+ Exposed=Window]
+interface RTCTrackEvent : Event {
+    // readonly attribute RTCRtpReceiver           receiver;
+    readonly attribute MediaStreamTrack         track;
+    // [SameObject]
+    // readonly attribute FrozenArray<MediaStream> streams;
+    // readonly attribute RTCRtpTransceiver        transceiver;
+};
+
+// https://www.w3.org/TR/webrtc/#dom-rtctrackeventinit
+dictionary RTCTrackEventInit : EventInit {
+    // required RTCRtpReceiver        receiver;
+    required MediaStreamTrack      track;
+             // sequence<MediaStream> streams = [];
+    // required RTCRtpTransceiver     transceiver;
+};