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pub mod event;
mod sys;
pub mod util;
use crossterm::tty::IsTty;
use crate::util::{Point, Size};
use std::io::{self, Write};
pub struct Terminal<'a> {
pub stdout: io::BufWriter<io::StdoutLock<'a>>,
pub size: Size,
#[cfg(debug_assertions)]
pub flush_count: usize,
#[cfg(debug_assertions)]
initialized: bool,
}
#[derive(Debug)]
#[non_exhaustive]
pub struct NotTTY;
impl<'a> Terminal<'a> {
pub fn new(stdout: io::StdoutLock<'a>) -> Result<Self, NotTTY> {
if !stdout.is_tty() {
return Err(NotTTY);
}
let writer = io::BufWriter::new(stdout);
Ok(Self {
stdout: writer,
size: Self::size(),
#[cfg(debug_assertions)]
flush_count: 0,
#[cfg(debug_assertions)]
initialized: false,
})
}
pub fn write(&mut self, string: &str) {
self.stdout
.write_all(string.as_bytes())
.expect("write to stdout failed");
}
pub fn write_bytes(&mut self, bytes: &[u8]) {
self.stdout
.write_all(bytes)
.expect("write to stdout failed");
}
pub fn flush(&mut self) {
self.stdout.flush().expect("flushing failed");
#[cfg(debug_assertions)]
{
if self.initialized {
self.flush_count += 1;
self.save_cursor_point();
self.set_cursor(Point { x: 0, y: 0 });
let flush_count = self.flush_count;
self.write(&format!("Flush count: {}", flush_count));
self.restore_cursor_point();
}
}
}
pub fn get_centered_border_point(&self, size: &Size) -> Point {
Point {
x: self.size.width / 2 - size.width / 2,
y: self.size.height / 2 - size.height / 2,
}
}
pub fn get_center(&self) -> Point {
Point {
x: self.size.width / 2,
y: self.size.height,
}
}
fn set_panic_hook() {
use std::panic;
let default_panic_hook = panic::take_hook();
panic::set_hook(Box::new(move |panic_info| {
let stdout = io::stdout();
if let Ok(mut terminal) = Terminal::new(stdout.lock()) {
terminal.deinitialize();
}
default_panic_hook(panic_info);
}));
}
pub fn initialize(&mut self) {
self.enter_alternate_dimension();
self.enable_raw_mode();
self.enable_mouse_capture();
self.hide_cursor();
self.flush();
Self::set_panic_hook();
#[cfg(debug_assertions)]
{
self.initialized = true;
}
}
pub fn deinitialize(&mut self) {
self.show_cursor();
self.disable_mouse_capture();
self.disable_raw_mode();
self.exit_alternate_dimension();
self.flush();
#[cfg(debug_assertions)]
{
self.initialized = false;
}
}
}
#[cfg(test)]
mod tests {
#[test]
fn it_works() {
assert_eq!(2 + 2, 4);
}
}