Add task source for media element

components/script/task_source/media_element.rs

@@ -0,0 +1,51 @@
+/* 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 dom::bindings::inheritance::Castable;
+use dom::bindings::refcounted::Trusted;
+use dom::event::SimpleEventTask;
+use dom::eventtarget::EventTarget;
+use dom::window::Window;
+use msg::constellation_msg::PipelineId;
+use script_runtime::{CommonScriptMsg, ScriptThreadEventCategory};
+use script_thread::MainThreadScriptMsg;
+use servo_atoms::Atom;
+use servo_channel::Sender;
+use std::fmt;
+use std::result::Result;
+use task::{TaskCanceller, TaskOnce};
+use task_source::{TaskSource, TaskSourceName};
+
+#[derive(Clone, JSTraceable)]
+pub struct MediaElementTaskSource(pub Sender<MainThreadScriptMsg>, pub PipelineId);
+
+impl fmt::Debug for MediaElementTaskSource {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "MediaElementTaskSource(...)")
+    }
+}
+
+impl TaskSource for MediaElementTaskSource {
+    const NAME: TaskSourceName = TaskSourceName::MediaElement;
+
+    fn queue_with_canceller<T>(&self, task: T, canceller: &TaskCanceller) -> Result<(), ()>
+    where
+        T: TaskOnce + 'static,
+    {
+        let msg = MainThreadScriptMsg::Common(CommonScriptMsg::Task(
+            ScriptThreadEventCategory::ScriptEvent,
+            Box::new(canceller.wrap_task(task)),
+            Some(self.1),
+            MediaElementTaskSource::NAME,
+        ));
+        self.0.send(msg).map_err(|_| ())
+    }
+}
+
+impl MediaElementTaskSource {
+    pub fn queue_simple_event(&self, target: &EventTarget, name: Atom, window: &Window) {
+        let target = Trusted::new(target);
+        let _ = self.queue(SimpleEventTask { target, name }, window.upcast());
+    }
+}

components/script/task_source/mod.rs

@@ -5,6 +5,7 @@
 pub mod dom_manipulation;
 pub mod file_reading;
 pub mod history_traversal;
+pub mod media_element;
 pub mod networking;
 pub mod performance_timeline;
 pub mod remote_event;
@@ -29,6 +30,7 @@ pub enum TaskSourceName {
     PerformanceTimeline,
     UserInteraction,
     RemoteEvent,
+    MediaElement,
     Websocket,
 }