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/* 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::script_runtime::{CommonScriptMsg, ScriptThreadEventCategory};
use crate::script_thread::MainThreadScriptMsg;
use crate::task::{TaskCanceller, TaskOnce};
use crate::task_source::{TaskSource, TaskSourceName};
use crossbeam_channel::Sender;
use msg::constellation_msg::PipelineId;
#[derive(Clone, JSTraceable)]
pub struct HistoryTraversalTaskSource(pub Sender<MainThreadScriptMsg>, pub PipelineId);
impl TaskSource for HistoryTraversalTaskSource {
const NAME: TaskSourceName = TaskSourceName::HistoryTraversal;
fn queue_with_canceller<T>(&self, task: T, canceller: &TaskCanceller) -> Result<(), ()>
where
T: TaskOnce + 'static,
{
let msg = MainThreadScriptMsg::Common(CommonScriptMsg::Task(
ScriptThreadEventCategory::HistoryEvent,
Box::new(canceller.wrap_task(task)),
Some(self.1),
HistoryTraversalTaskSource::NAME,
));
self.0.send(msg).map_err(|_| ())
}
}
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