mirror of https://github.com/helix-editor/helix
Add some async job infrastructure.
parent
c9be480bf8
commit
d64d75e724
@ -0,0 +1,100 @@
|
||||
use helix_view::Editor;
|
||||
|
||||
use crate::compositor::Compositor;
|
||||
|
||||
use futures_util::future::{self, BoxFuture, Future, FutureExt};
|
||||
use futures_util::stream::{self, FuturesUnordered, Select, StreamExt};
|
||||
|
||||
pub type Callback = Box<dyn FnOnce(&mut Editor, &mut Compositor) + Send>;
|
||||
pub type JobFuture = BoxFuture<'static, anyhow::Result<Option<Callback>>>;
|
||||
|
||||
pub struct Job {
|
||||
pub future: BoxFuture<'static, anyhow::Result<Option<Callback>>>,
|
||||
/// Do we need to wait for this job to finish before exiting?
|
||||
pub wait: bool,
|
||||
}
|
||||
|
||||
#[derive(Default)]
|
||||
pub struct Jobs {
|
||||
futures: FuturesUnordered<JobFuture>,
|
||||
/// These are the ones that need to complete before we exit.
|
||||
wait_futures: FuturesUnordered<JobFuture>,
|
||||
}
|
||||
|
||||
impl Job {
|
||||
pub fn new<F: Future<Output = anyhow::Result<()>> + Send + 'static>(f: F) -> Job {
|
||||
Job {
|
||||
future: f.map(|r| r.map(|()| None)).boxed(),
|
||||
wait: false,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn with_callback<F: Future<Output = anyhow::Result<Callback>> + Send + 'static>(
|
||||
f: F,
|
||||
) -> Job {
|
||||
Job {
|
||||
future: f.map(|r| r.map(|x| Some(x))).boxed(),
|
||||
wait: false,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn wait_before_exiting(mut self) -> Job {
|
||||
self.wait = true;
|
||||
self
|
||||
}
|
||||
}
|
||||
|
||||
impl Jobs {
|
||||
pub fn new() -> Jobs {
|
||||
Jobs::default()
|
||||
}
|
||||
|
||||
pub fn spawn<F: Future<Output = anyhow::Result<()>> + Send + 'static>(&mut self, f: F) {
|
||||
self.add(Job::new(f));
|
||||
}
|
||||
|
||||
pub fn callback<F: Future<Output = anyhow::Result<Callback>> + Send + 'static>(
|
||||
&mut self,
|
||||
f: F,
|
||||
) {
|
||||
self.add(Job::with_callback(f));
|
||||
}
|
||||
|
||||
pub fn handle_callback(
|
||||
&mut self,
|
||||
editor: &mut Editor,
|
||||
compositor: &mut Compositor,
|
||||
call: anyhow::Result<Option<Callback>>,
|
||||
) {
|
||||
match call {
|
||||
Ok(None) => {}
|
||||
Ok(Some(call)) => {
|
||||
call(editor, compositor);
|
||||
}
|
||||
Err(e) => {
|
||||
editor.set_error(format!("Async job failed: {}", e));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub fn next<'a>(
|
||||
&'a mut self,
|
||||
) -> impl Future<Output = Option<anyhow::Result<Option<Callback>>>> + 'a {
|
||||
future::select(self.futures.next(), self.wait_futures.next())
|
||||
.map(|either| either.factor_first().0)
|
||||
}
|
||||
|
||||
pub fn add(&mut self, j: Job) {
|
||||
if j.wait {
|
||||
self.wait_futures.push(j.future);
|
||||
} else {
|
||||
self.futures.push(j.future);
|
||||
}
|
||||
}
|
||||
|
||||
/// Blocks until all the jobs that need to be waited on are done.
|
||||
pub fn finish(&mut self) {
|
||||
let wait_futures = std::mem::take(&mut self.wait_futures);
|
||||
helix_lsp::block_on(wait_futures.for_each(|_| future::ready(())));
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue