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//! A `wasm-bindgen-futures` backend.
/// A `wasm-bindgen-futures` executor.
#[derive(Debug)]
pub struct Executor;
impl crate::Executor for Executor {
fn new() -> Result<Self, futures::io::Error> {
Ok(Self)
}
fn spawn(&self, future: impl futures::Future<Output = ()> + 'static) {
wasm_bindgen_futures::spawn_local(future);
}
}
pub mod time {
//! Listen and react to time.
use crate::subscription::{self, Hasher, Subscription};
use crate::BoxStream;
/// Returns a [`Subscription`] that produces messages at a set interval.
///
/// The first message is produced after a `duration`, and then continues to
/// produce more messages every `duration` after that.
pub fn every(
duration: std::time::Duration,
) -> Subscription<wasm_timer::Instant> {
subscription::from_recipe(Every(duration))
}
#[derive(Debug)]
struct Every(std::time::Duration);
impl subscription::Recipe for Every {
type Output = wasm_timer::Instant;
fn hash(&self, state: &mut Hasher) {
use std::hash::Hash;
std::any::TypeId::of::<Self>().hash(state);
self.0.hash(state);
}
fn stream(
self: Box<Self>,
_input: subscription::EventStream,
) -> BoxStream<Self::Output> {
use futures::stream::StreamExt;
wasm_timer::Interval::new(self.0)
.map(|_| wasm_timer::Instant::now())
.boxed_local()
}
}
}
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