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use std::io;
use std::path;
use std::process;
use std::sync::mpsc;
use std::thread;
use signal_hook::consts::signal;
use signal_hook::iterator::exfiltrator::SignalOnly;
use signal_hook::iterator::SignalsInfo;
use termion::event::Event;
use termion::input::TermRead;
use crate::io::IoWorkerProgress;
#[derive(Debug)]
pub enum AppEvent {
Termion(Event),
IoWorkerProgress(IoWorkerProgress),
IoWorkerResult(io::Result<IoWorkerProgress>),
PreviewDir(io::Result<path::PathBuf>),
PreviewFile(process::Output),
Signal(i32),
// Filesystem(notify::Result),
}
#[derive(Debug, Clone, Copy)]
pub struct Config {}
impl Default for Config {
fn default() -> Config {
Config {}
}
}
/// A small event handler that wrap termion input and tick events. Each event
/// type is handled in its own thread and returned to a common `Receiver`
pub struct Events {
pub event_tx: mpsc::Sender<AppEvent>,
event_rx: mpsc::Receiver<AppEvent>,
pub input_tx: mpsc::SyncSender<()>,
}
impl Events {
pub fn new() -> Self {
Events::with_config()
}
pub fn with_config() -> Self {
let (input_tx, input_rx) = mpsc::sync_channel(1);
let (event_tx, event_rx) = mpsc::channel();
// signal thread
let event_tx2 = event_tx.clone();
let _ = thread::spawn(move || {
let sigs = vec![signal::SIGWINCH];
let mut signals = SignalsInfo::<SignalOnly>::new(&sigs).unwrap();
for signal in &mut signals {
if let Err(e) = event_tx2.send(AppEvent::Signal(signal)) {
eprintln!("Signal thread send err: {:#?}", e);
return;
}
}
});
// input thread
let event_tx2 = event_tx.clone();
let _ = thread::spawn(move || {
let stdin = io::stdin();
let mut events = stdin.events();
match events.next() {
Some(event) => match event {
Ok(event) => {
if let Err(e) = event_tx2.send(AppEvent::Termion(event)) {
eprintln!("Input thread send err: {:#?}", e);
return;
}
}
Err(_) => return,
},
None => return,
}
while input_rx.recv().is_ok() {
if let Some(Ok(event)) = events.next() {
if let Err(e) = event_tx2.send(AppEvent::Termion(event)) {
eprintln!("Input thread send err: {:#?}", e);
return;
}
}
}
});
Events {
event_tx,
event_rx,
input_tx,
}
}
pub fn next(&self) -> Result<AppEvent, mpsc::RecvError> {
let event = self.event_rx.recv()?;
Ok(event)
}
pub fn flush(&self) {
let _ = self.input_tx.send(());
}
}
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