100 lines
2.7 KiB
Rust
100 lines
2.7 KiB
Rust
use helix_view::Editor;
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use crate::compositor::Compositor;
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use futures_util::future::{self, BoxFuture, Future, FutureExt};
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use futures_util::stream::{FuturesUnordered, StreamExt};
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pub type Callback = Box<dyn FnOnce(&mut Editor, &mut Compositor) + Send>;
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pub type JobFuture = BoxFuture<'static, anyhow::Result<Option<Callback>>>;
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pub struct Job {
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pub future: BoxFuture<'static, anyhow::Result<Option<Callback>>>,
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/// Do we need to wait for this job to finish before exiting?
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pub wait: bool,
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}
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#[derive(Default)]
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pub struct Jobs {
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pub futures: FuturesUnordered<JobFuture>,
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/// These are the ones that need to complete before we exit.
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pub wait_futures: FuturesUnordered<JobFuture>,
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}
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impl Job {
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pub fn new<F: Future<Output = anyhow::Result<()>> + Send + 'static>(f: F) -> Job {
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Job {
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future: f.map(|r| r.map(|()| None)).boxed(),
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wait: false,
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}
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}
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pub fn with_callback<F: Future<Output = anyhow::Result<Callback>> + Send + 'static>(
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f: F,
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) -> Job {
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Job {
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future: f.map(|r| r.map(Some)).boxed(),
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wait: false,
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}
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}
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pub fn wait_before_exiting(mut self) -> Job {
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self.wait = true;
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self
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}
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}
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impl Jobs {
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pub fn new() -> Jobs {
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Jobs::default()
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}
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pub fn spawn<F: Future<Output = anyhow::Result<()>> + Send + 'static>(&mut self, f: F) {
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self.add(Job::new(f));
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}
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pub fn callback<F: Future<Output = anyhow::Result<Callback>> + Send + 'static>(
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&mut self,
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f: F,
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) {
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self.add(Job::with_callback(f));
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}
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pub fn handle_callback(
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&mut self,
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editor: &mut Editor,
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compositor: &mut Compositor,
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call: anyhow::Result<Option<Callback>>,
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) {
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match call {
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Ok(None) => {}
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Ok(Some(call)) => {
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call(editor, compositor);
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}
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Err(e) => {
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editor.set_error(format!("Async job failed: {}", e));
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}
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}
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}
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pub async fn next_job(&mut self) -> Option<anyhow::Result<Option<Callback>>> {
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tokio::select! {
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event = self.futures.next() => { event }
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event = self.wait_futures.next() => { event }
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}
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}
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pub fn add(&mut self, j: Job) {
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if j.wait {
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self.wait_futures.push(j.future);
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} else {
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self.futures.push(j.future);
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}
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}
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/// Blocks until all the jobs that need to be waited on are done.
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pub fn finish(&mut self) {
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let wait_futures = std::mem::take(&mut self.wait_futures);
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helix_lsp::block_on(wait_futures.for_each(|_| future::ready(())));
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}
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}
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