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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 https://mozilla.org/MPL/2.0/. */
use std::fmt;
use std::result::Result;
use base::id::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(|_| ())
}
}
impl RenderingTaskSource {
/// This queues a task that will not be cancelled when its associated
/// global scope gets destroyed.
pub fn queue_unconditionally<T>(&self, task: T) -> Result<(), ()>
where
T: TaskOnce + 'static,
{
self.0.send(CommonScriptMsg::Task(
ScriptThreadEventCategory::NetworkEvent,
Box::new(task),
Some(self.1),
RenderingTaskSource::NAME,
))
}
}
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