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use super::{to_ms, Task};
use crate::callback::Callback;
use cfg_if::cfg_if;
use cfg_match::cfg_match;
use std::fmt;
use std::time::Duration;
cfg_if! {
if #[cfg(feature = "std_web")] {
use stdweb::Value;
#[allow(unused_imports)]
use stdweb::{_js_impl, js};
} else if #[cfg(feature = "web_sys")] {
use gloo::timers::callback::Timeout;
}
}
#[must_use]
pub struct TimeoutTask(
#[cfg(feature = "std_web")] Option<Value>,
#[cfg(feature = "web_sys")] Option<Timeout>,
);
impl fmt::Debug for TimeoutTask {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str("TimeoutTask")
}
}
#[derive(Default, Debug)]
pub struct TimeoutService {}
impl TimeoutService {
pub fn new() -> Self {
Self {}
}
pub fn spawn(&mut self, duration: Duration, callback: Callback<()>) -> TimeoutTask {
let callback = move || {
callback.emit(());
};
let ms = to_ms(duration);
let handle = cfg_match! {
feature = "std_web" => js! {
var callback = @{callback};
var action = function() {
callback();
callback.drop();
};
var delay = @{ms};
return {
timeout_id: setTimeout(action, delay),
callback: callback,
};
},
feature = "web_sys" => Timeout::new(ms, callback),
};
TimeoutTask(Some(handle))
}
}
impl Task for TimeoutTask {
fn is_active(&self) -> bool {
self.0.is_some()
}
}
impl Drop for TimeoutTask {
fn drop(&mut self) {
#[cfg(feature = "std_web")]
{
if self.is_active() {
let handle = &self.0;
js! { @(no_return)
var handle = @{handle};
clearTimeout(handle.timeout_id);
handle.callback.drop();
}
}
}
}
}