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use std::io::{self, Write};
#[derive(Debug, Clone, Copy)]
pub enum Direction {
Up,
Down,
Left,
Right,
}
pub fn fmove_cursor(direction: Direction, n: usize, stdout: &mut dyn Write) -> std::io::Result<()> {
if n == 0 {
return Ok(());
}
let code = match direction {
Direction::Up => 'A',
Direction::Down => 'B',
Direction::Right => 'C',
Direction::Left => 'D',
};
write!(stdout, "\x1b[{n}{code}")
}
pub fn move_cursor(direction: Direction, n: usize) {
fmove_cursor(direction, n, &mut std::io::stdout()).unwrap()
}
pub fn f_save(stdout: &mut dyn Write) -> std::io::Result<()> {
stdout.write_all(b"\x1b[s")
}
pub fn f_restore(stdout: &mut dyn Write) -> std::io::Result<()> {
stdout.write_all(b"\x1b[u")
}
pub fn save() {
f_save(&mut std::io::stdout().lock()).unwrap();
}
pub fn restore() {
f_restore(&mut std::io::stdout().lock()).unwrap();
}
/// Represents a cursor position
#[derive(Debug, Clone, Copy)]
pub struct CursorPos {
pub row: usize,
pub col: usize,
}
impl Default for CursorPos {
fn default() -> Self {
Self { row: 1, col: 1 }
}
}
impl CursorPos {
pub fn f_go_to(&self, stdout: &mut dyn Write) -> std::io::Result<()> {
write!(stdout, "\x1b[{};{}H", self.row, self.col)
}
pub fn go_to(&self) {
let mut stdout = io::stdout().lock();
self.f_go_to(&mut stdout).unwrap();
stdout.flush().unwrap();
}
}
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