1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/* 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::rc::Rc;
use ipc_channel::ipc::{self, IpcSender};
use ipc_channel::router::ROUTER;
use serde::Serialize;
use serde::de::DeserializeOwned;
use crate::dom::bindings::refcounted::{Trusted, TrustedPromise};
use crate::dom::bindings::reflector::DomObject;
use crate::dom::promise::Promise;
use crate::script_runtime::CanGc;
use crate::task_source::TaskSource;
pub(crate) trait RoutedPromiseListener<R: Serialize + DeserializeOwned + Send> {
fn handle_response(&self, response: R, promise: &Rc<Promise>, can_gc: CanGc);
}
pub(crate) struct RoutedPromiseContext<
R: Serialize + DeserializeOwned + Send,
T: RoutedPromiseListener<R> + DomObject,
> {
trusted: TrustedPromise,
receiver: Trusted<T>,
_phantom: std::marker::PhantomData<R>,
}
impl<R: Serialize + DeserializeOwned + Send, T: RoutedPromiseListener<R> + DomObject>
RoutedPromiseContext<R, T>
{
fn response(self, response: R, can_gc: CanGc) {
let promise = self.trusted.root();
self.receiver
.root()
.handle_response(response, &promise, can_gc);
}
}
pub(crate) fn route_promise<
R: Serialize + DeserializeOwned + Send + 'static,
T: RoutedPromiseListener<R> + DomObject + 'static,
>(
promise: &Rc<Promise>,
receiver: &T,
task_source: TaskSource,
) -> IpcSender<R> {
let (action_sender, action_receiver) = ipc::channel().unwrap();
let task_source = task_source.to_sendable();
let mut trusted: Option<TrustedPromise> = Some(TrustedPromise::new(promise.clone()));
let trusted_receiver = Trusted::new(receiver);
ROUTER.add_typed_route(
action_receiver,
Box::new(move |message| {
let trusted = if let Some(trusted) = trusted.take() {
trusted
} else {
error!("RoutedPromiseListener callback called twice!");
return;
};
let context = RoutedPromiseContext {
trusted,
receiver: trusted_receiver.clone(),
_phantom: Default::default(),
};
task_source.queue(task!(routed_promise_task: move|| {
context.response(message.unwrap(), CanGc::note());
}));
}),
);
action_sender
}
|
