1 files changed, 45 insertions, 0 deletions
diff --git a/components/script/task_source/rendering.rs b/components/script/task_source/rendering.rs
new file mode 100644
index 00000000000..732eb2aef2b
--- /dev/null
+++ b/components/script/task_source/rendering.rs
@@ -0,0 +1,45 @@
+/* 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 std::fmt;
+use std::result::Result;
+
+use msg::constellation_msg::PipelineId;
+
+use crate::script_runtime::{CommonScriptMsg, ScriptChan, ScriptThreadEventCategory};
+use crate::task::{TaskCanceller, TaskOnce};
+use crate::task_source::{TaskSource, TaskSourceName};
+
+#[derive(JSTraceable)]
+pub struct RenderingTaskSource(pub Box<dyn ScriptChan + Send>, #[no_trace] pub PipelineId);
+
+impl Clone for RenderingTaskSource {
+    fn clone(&self) -> RenderingTaskSource {
+        RenderingTaskSource(self.0.clone(), self.1)
+    }
+}
+
+impl fmt::Debug for RenderingTaskSource {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "RenderingTaskSource(...)")
+    }
+}
+
+impl TaskSource for RenderingTaskSource {
+    const NAME: TaskSourceName = TaskSourceName::Rendering;
+
+    fn queue_with_canceller<T>(&self, task: T, canceller: &TaskCanceller) -> Result<(), ()>
+    where
+        T: TaskOnce + 'static,
+    {
+        let msg_task = CommonScriptMsg::Task(
+            ScriptThreadEventCategory::ScriptEvent,
+            Box::new(canceller.wrap_task(task)),
+            Some(self.1),
+            RenderingTaskSource::NAME,
+        );
+
+        self.0.send(msg_task).map_err(|_| ())
+    }
+}