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|
use super::{poll_abort_signal, wait_abort_signal, AbortSignal, IS_STDOUT_TERMINAL};
use anyhow::{bail, Result};
use crossterm::{
cursor, queue, style,
terminal::{self, disable_raw_mode, enable_raw_mode},
};
use std::{
future::Future,
io::{stdout, Write},
time::Duration,
};
use tokio::{
sync::{mpsc, oneshot},
time::interval,
};
pub struct SpinnerInner {
index: usize,
message: String,
}
impl SpinnerInner {
const DATA: [&'static str; 10] = ["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"];
fn new(message: &str) -> Self {
SpinnerInner {
index: 0,
message: message.to_string(),
}
}
fn step(&mut self) -> Result<()> {
if !*IS_STDOUT_TERMINAL || self.message.is_empty() {
return Ok(());
}
let mut writer = stdout();
let frame = Self::DATA[self.index % Self::DATA.len()];
let dots = ".".repeat((self.index / 5) % 4);
let line = format!("{frame}{}{:<3}", self.message, dots);
queue!(writer, cursor::MoveToColumn(0), style::Print(line),)?;
if self.index == 0 {
queue!(writer, cursor::Hide)?;
}
writer.flush()?;
self.index += 1;
Ok(())
}
fn set_message(&mut self, message: String) -> Result<()> {
self.clear_message()?;
if !message.is_empty() {
self.message = format!(" {message}");
}
Ok(())
}
fn clear_message(&mut self) -> Result<()> {
if !*IS_STDOUT_TERMINAL || self.message.is_empty() {
return Ok(());
}
self.message.clear();
let mut writer = stdout();
queue!(
writer,
cursor::MoveToColumn(0),
terminal::Clear(terminal::ClearType::FromCursorDown),
cursor::Show
)?;
writer.flush()?;
Ok(())
}
}
#[derive(Clone)]
pub struct Spinner(mpsc::UnboundedSender<SpinnerEvent>);
impl Drop for Spinner {
fn drop(&mut self) {
self.stop();
}
}
impl Spinner {
pub fn set_message(&self, message: String) -> Result<()> {
self.0.send(SpinnerEvent::SetMessage(message))?;
std::thread::sleep(Duration::from_millis(10));
Ok(())
}
pub fn stop(&self) {
let _ = self.0.send(SpinnerEvent::Stop);
std::thread::sleep(Duration::from_millis(10));
}
}
enum SpinnerEvent {
SetMessage(String),
Stop,
}
pub async fn create_spinner(message: &str) -> Spinner {
let message = format!(" {message}");
let (tx, rx) = mpsc::unbounded_channel();
tokio::spawn(run_spinner(message, rx));
Spinner(tx)
}
async fn run_spinner(message: String, mut rx: mpsc::UnboundedReceiver<SpinnerEvent>) -> Result<()> {
let mut spinner = SpinnerInner::new(&message);
let mut interval = interval(Duration::from_millis(50));
loop {
tokio::select! {
_ = interval.tick() => {
let _ = spinner.step();
}
evt = rx.recv() => {
if let Some(evt) = evt {
match evt {
SpinnerEvent::SetMessage(message) => {
spinner.set_message(message)?;
}
SpinnerEvent::Stop => {
spinner.clear_message()?;
break;
}
}
}
}
}
}
Ok(())
}
pub async fn abortable_run_with_spinner<F, T>(
task: F,
message: &str,
abort_signal: AbortSignal,
) -> Result<T>
where
F: Future<Output = Result<T>>,
{
if *IS_STDOUT_TERMINAL {
let (done_tx, done_rx) = oneshot::channel();
let run_task = async {
tokio::select! {
ret = task => {
let _ = done_tx.send(());
ret
}
_ = wait_abort_signal(&abort_signal) => {
let _ = done_tx.send(());
bail!("Aborted.");
},
}
};
let (task_ret, spinner_ret) = tokio::join!(
run_task,
run_abortable_spinner(message, abort_signal.clone(), done_rx)
);
spinner_ret?;
task_ret
} else {
task.await
}
}
async fn run_abortable_spinner(
message: &str,
abort_signal: AbortSignal,
done_rx: oneshot::Receiver<()>,
) -> Result<()> {
enable_raw_mode()?;
let ret = run_abortable_spinner_inner(message, abort_signal, done_rx).await;
disable_raw_mode()?;
ret
}
async fn run_abortable_spinner_inner(
message: &str,
abort_signal: AbortSignal,
mut done_rx: oneshot::Receiver<()>,
) -> Result<()> {
let message = format!(" {message}");
let mut spinner = SpinnerInner::new(&message);
loop {
if abort_signal.aborted() {
break;
}
tokio::time::sleep(Duration::from_millis(25)).await;
match done_rx.try_recv() {
Ok(_) | Err(oneshot::error::TryRecvError::Closed) => {
break;
}
_ => {}
}
if poll_abort_signal(&abort_signal)? {
break;
}
spinner.step()?;
}
spinner.clear_message()?;
Ok(())
}
|
