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use std::io::Write as _;
use super::private::TextmodeImpl as _;
pub struct Textmode {
cur: vt100::Parser,
next: vt100::Parser,
}
impl super::private::TextmodeImpl for Textmode {
fn cur(&self) -> &vt100::Parser {
&self.cur
}
fn cur_mut(&mut self) -> &mut vt100::Parser {
&mut self.cur
}
fn next(&self) -> &vt100::Parser {
&self.next
}
fn next_mut(&mut self) -> &mut vt100::Parser {
&mut self.next
}
}
impl super::TextmodeExt for Textmode {}
impl Textmode {
pub fn new() -> std::io::Result<Self> {
let (rows, cols) = match terminal_size::terminal_size() {
Some((terminal_size::Width(w), terminal_size::Height(h))) => {
(h, w)
}
_ => (24, 80),
};
let cur = vt100::Parser::new(rows, cols, 0);
let next = vt100::Parser::new(rows, cols, 0);
let self_ = Self { cur, next };
self_.write_stdout(super::INIT)?;
Ok(self_)
}
pub fn refresh(&mut self) -> std::io::Result<()> {
let diffs = &[
self.next().screen().contents_diff(self.cur().screen()),
self.next().screen().input_mode_diff(self.cur().screen()),
self.next().screen().title_diff(self.cur().screen()),
self.next().screen().bells_diff(self.cur().screen()),
];
for diff in diffs {
self.write_stdout(&diff)?;
self.cur_mut().process(&diff);
}
Ok(())
}
fn write_stdout(&self, buf: &[u8]) -> std::io::Result<()> {
let mut stdout = std::io::stdout();
stdout.write_all(buf)?;
stdout.flush()?;
Ok(())
}
}
impl Drop for Textmode {
fn drop(&mut self) {
let _ = self.write_stdout(super::DEINIT);
}
}
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