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use crossterm::event::{self, Event, KeyCode, KeyEventKind};
use std::sync::{
atomic::{AtomicBool, Ordering::Relaxed},
mpsc::Sender,
};
use super::WatchEvent;
static INPUT_PAUSED: AtomicBool = AtomicBool::new(false);
// Private unit type to force using the constructor function.
#[must_use = "When the guard is dropped, the input is unpaused"]
pub struct InputPauseGuard(());
impl InputPauseGuard {
#[inline]
pub fn scoped_pause() -> Self {
INPUT_PAUSED.store(true, Relaxed);
Self(())
}
}
impl Drop for InputPauseGuard {
#[inline]
fn drop(&mut self) {
INPUT_PAUSED.store(false, Relaxed);
}
}
pub enum InputEvent {
Run,
Next,
Hint,
List,
Quit,
}
pub fn terminal_event_handler(sender: Sender<WatchEvent>, manual_run: bool) {
let last_watch_event = loop {
match event::read() {
Ok(Event::Key(key)) => {
match key.kind {
KeyEventKind::Release | KeyEventKind::Repeat => continue,
KeyEventKind::Press => (),
}
if INPUT_PAUSED.load(Relaxed) {
continue;
}
let input_event = match key.code {
KeyCode::Char('n') => InputEvent::Next,
KeyCode::Char('h') => InputEvent::Hint,
KeyCode::Char('l') => break WatchEvent::Input(InputEvent::List),
KeyCode::Char('q') => break WatchEvent::Input(InputEvent::Quit),
KeyCode::Char('r') if manual_run => InputEvent::Run,
_ => continue,
};
if sender.send(WatchEvent::Input(input_event)).is_err() {
return;
}
}
Ok(Event::Resize(width, _)) => {
if sender.send(WatchEvent::TerminalResize { width }).is_err() {
return;
}
}
Ok(Event::FocusGained | Event::FocusLost | Event::Mouse(_)) => continue,
Err(e) => break WatchEvent::TerminalEventErr(e),
}
};
let _ = sender.send(last_watch_event);
}
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