Renamed ScriptChan in constellation to EventLoop.

components/constellation/event_loop.rs

@@ -0,0 +1,46 @@
+/* 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/. */
+
+//! This module contains the `EventLoop` type, which is the constellation's
+//! view of a script thread. When an `EventLoop` is dropped, an `ExitScriptThread`
+//! message is sent to the script thread, asking it to shut down.
+
+use ipc_channel::ipc::IpcSender;
+use script_traits::ConstellationControlMsg;
+use std::io::Error as IOError;
+use std::marker::PhantomData;
+use std::rc::Rc;
+
+/// https://html.spec.whatwg.org/multipage/#event-loop
+pub struct EventLoop {
+    script_chan: IpcSender<ConstellationControlMsg>,
+    dont_send_or_sync: PhantomData<Rc<()>>,
+}
+
+impl Drop for EventLoop {
+    fn drop(&mut self) {
+        let _ = self.script_chan.send(ConstellationControlMsg::ExitScriptThread);
+    }
+}
+
+impl EventLoop {
+    /// Create a new event loop from the channel to its script thread.
+    pub fn new(script_chan: IpcSender<ConstellationControlMsg>) -> Rc<EventLoop> {
+        Rc::new(EventLoop {
+            script_chan: script_chan,
+            dont_send_or_sync: PhantomData,
+        })
+    }
+
+    /// Send a message to the event loop.
+    pub fn send(&self, msg: ConstellationControlMsg) -> Result<(), IOError> {
+        self.script_chan.send(msg)
+    }
+
+    /// The underlying channel to the script thread.
+    pub fn sender(&self) -> IpcSender<ConstellationControlMsg> {
+        self.script_chan.clone()
+    }
+}
+