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use std::io;
#[cfg(feature = "crossterm")]
mod crossterm;
#[cfg(feature = "termion")]
mod termion;
#[cfg(feature = "crossterm")]
pub use self::crossterm::CrosstermEvents;
#[cfg(feature = "termion")]
pub use self::termion::TermionEvents;
mod keys;
mod movement;
pub use keys::{KeyCode, KeyEvent, KeyModifiers};
pub use movement::Movement;
#[cfg(any(feature = "crossterm", feature = "termion"))]
#[cfg_attr(docsrs, doc(cfg(any(feature = "crossterm", feature = "termion"))))]
pub fn get_events() -> impl EventIterator {
#[cfg(feature = "crossterm")]
return CrosstermEvents::new();
#[cfg(not(feature = "crossterm"))]
return TermionEvents::new();
}
pub trait EventIterator {
fn next_event(&mut self) -> io::Result<KeyEvent>;
}
#[derive(Debug, Clone)]
pub struct TestEvents<E: Iterator<Item = KeyEvent>> {
events: E,
}
impl<E: Iterator<Item = KeyEvent>> TestEvents<E> {
pub fn new<I: IntoIterator<IntoIter = E, Item = KeyEvent>>(iter: I) -> Self {
Self {
events: iter.into_iter(),
}
}
}
impl TestEvents<std::iter::Empty<KeyEvent>> {
pub fn empty() -> Self {
Self {
events: std::iter::empty(),
}
}
}
impl<E: Iterator<Item = KeyEvent>> EventIterator for TestEvents<E> {
fn next_event(&mut self) -> io::Result<KeyEvent> {
Ok(self
.events
.next()
.expect("Events ran out, but another one was requested"))
}
}
impl<E: Iterator<Item = KeyEvent>> Drop for TestEvents<E> {
fn drop(&mut self) {
let mut count = 0;
while self.events.next().is_some() {
count += 1
}
assert_eq!(
count, 0,
"Events did not fully run out, {} events have not been consumed",
count
);
}
}