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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::sync::{Arc, Mutex};
use net_traits::{
Action, BoxedFetchCallback, FetchResponseListener, FetchResponseMsg, ResourceFetchTiming,
ResourceTimingType,
};
use servo_url::ServoUrl;
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::root::DomRoot;
use crate::dom::globalscope::GlobalScope;
use crate::dom::performanceentry::PerformanceEntry;
use crate::dom::performanceresourcetiming::{InitiatorType, PerformanceResourceTiming};
use crate::script_runtime::CanGc;
use crate::task::TaskOnce;
use crate::task_source::SendableTaskSource;
/// An off-thread sink for async network event tasks. All such events are forwarded to
/// a target thread, where they are invoked on the provided context object.
pub(crate) struct NetworkListener<Listener: PreInvoke + Send + 'static> {
pub(crate) context: Arc<Mutex<Listener>>,
pub(crate) task_source: SendableTaskSource,
}
pub(crate) trait ResourceTimingListener {
fn resource_timing_information(&self) -> (InitiatorType, ServoUrl);
fn resource_timing_global(&self) -> DomRoot<GlobalScope>;
}
pub(crate) fn submit_timing<T: ResourceTimingListener + FetchResponseListener>(
listener: &T,
can_gc: CanGc,
) {
if listener.resource_timing().timing_type != ResourceTimingType::Resource {
warn!(
"Submitting non-resource ({:?}) timing as resource",
listener.resource_timing().timing_type
);
return;
}
let (initiator_type, url) = listener.resource_timing_information();
if initiator_type == InitiatorType::Other {
warn!("Ignoring InitiatorType::Other resource {:?}", url);
return;
}
submit_timing_data(
&listener.resource_timing_global(),
url,
initiator_type,
listener.resource_timing(),
can_gc,
);
}
pub(crate) fn submit_timing_data(
global: &GlobalScope,
url: ServoUrl,
initiator_type: InitiatorType,
resource_timing: &ResourceFetchTiming,
can_gc: CanGc,
) {
let performance_entry =
PerformanceResourceTiming::new(global, url, initiator_type, None, resource_timing, can_gc);
global
.performance()
.queue_entry(performance_entry.upcast::<PerformanceEntry>(), can_gc);
}
impl<Listener: PreInvoke + Send + 'static> NetworkListener<Listener> {
pub(crate) fn notify<A: Action<Listener> + Send + 'static>(&mut self, action: A) {
self.task_source.queue(ListenerTask {
context: self.context.clone(),
action,
});
}
}
// helps type inference
impl<Listener: FetchResponseListener + PreInvoke + Send + 'static> NetworkListener<Listener> {
pub(crate) fn notify_fetch(&mut self, action: FetchResponseMsg) {
self.notify(action);
}
pub(crate) fn into_callback(mut self) -> BoxedFetchCallback {
Box::new(move |response_msg| self.notify_fetch(response_msg))
}
}
/// A gating mechanism that runs before invoking the task on the target thread.
/// If the `should_invoke` method returns false, the task is discarded without
/// being invoked.
pub(crate) trait PreInvoke {
fn should_invoke(&self) -> bool {
true
}
}
/// A task for moving the async network events between threads.
struct ListenerTask<A: Action<Listener> + Send + 'static, Listener: PreInvoke + Send> {
context: Arc<Mutex<Listener>>,
action: A,
}
impl<A, Listener> TaskOnce for ListenerTask<A, Listener>
where
A: Action<Listener> + Send + 'static,
Listener: PreInvoke + Send,
{
fn run_once(self) {
let mut context = self.context.lock().unwrap();
if context.should_invoke() {
self.action.process(&mut *context);
}
}
}
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