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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/. */
// XXX The spec says that the performance timeline task source should be
// a low priority task and it should be processed during idle periods.
// We are currently treating this task queue as a normal priority queue.
use dom::bindings::refcounted::Trusted;
use dom::globalscope::GlobalScope;
use dom::performance::Performance;
use script_runtime::{CommonScriptMsg, ScriptChan, ScriptThreadEventCategory};
use std::fmt;
use std::result::Result;
use task::{Task, TaskCanceller};
use task_source::TaskSource;
pub struct NotifyPerformanceObserverTask {
owner: Trusted<Performance>,
}
impl NotifyPerformanceObserverTask {
pub fn new(owner: Trusted<Performance>) -> Self {
NotifyPerformanceObserverTask {
owner,
}
}
}
impl Task for NotifyPerformanceObserverTask {
fn run(self: Box<Self>) {
self.owner.root().notify_observers();
}
}
#[derive(JSTraceable)]
pub struct PerformanceTimelineTaskSource(pub Box<ScriptChan + Send + 'static>);
impl Clone for PerformanceTimelineTaskSource {
fn clone(&self) -> PerformanceTimelineTaskSource {
PerformanceTimelineTaskSource(self.0.clone())
}
}
impl fmt::Debug for PerformanceTimelineTaskSource {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "PerformanceTimelineTaskSource(...)")
}
}
impl TaskSource for PerformanceTimelineTaskSource {
fn queue_with_canceller<T>(
&self,
msg: Box<T>,
canceller: &TaskCanceller,
) -> Result<(), ()>
where
T: Send + Task + 'static,
{
let msg = CommonScriptMsg::Task(
ScriptThreadEventCategory::PerformanceTimelineTask,
canceller.wrap_task(msg)
);
self.0.send(msg).map_err(|_| ())
}
}
impl PerformanceTimelineTaskSource {
pub fn queue_notification(&self, global: &GlobalScope) {
let owner = Trusted::new(&*global.performance());
let task = box NotifyPerformanceObserverTask::new(owner);
let _ = self.queue(task, global);
}
}
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