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mod readtty;
mod colorhash;
use std::io;
use bstr::ByteSlice;
use mortal::{ Event, Key };
use colorhash::{ ColorStar, hash_chars_as_color, random_color };
use readtty::Term;
pub struct AskPass<B> {
star: char,
buf: B
}
impl<B: AsMut<[u8]>> AskPass<B> {
pub fn new(buf: B) -> AskPass<B> {
AskPass { star: '*', buf }
}
pub fn with_star(mut self, star: char) -> AskPass<B> {
self.star = star;
self
}
pub fn as_buffer(&self) -> &B {
&self.buf
}
pub fn into_buffer(self) -> B {
self.buf
}
}
impl<B: AsMut<[u8]>> AskPass<B> {
pub fn askpass<'a>(&'a mut self, prompt: &str) -> io::Result<&'a [u8]> {
let terminal = Term::new()?;
let mut pos = 0;
terminal.read_event(|event| {
let buf = self.buf.as_mut();
let star = self.star;
match event {
Event::Key(Key::Enter) => return Ok(true),
Event::Key(Key::Char(c)) => if buf.len() - pos > c.len_utf8() {
c.encode_utf8(&mut buf[pos..]);
pos += c.len_utf8();
},
Event::Key(Key::Backspace) => pos = buf[..pos].char_indices()
.last()
.map(|(start, ..)| start)
.unwrap_or(0)
,
Event::Key(Key::Escape) => pos = 0,
Event::Key(Key::Ctrl('c')) =>
return Err(io::Error::new(io::ErrorKind::Interrupted, "Ctrl-c")),
Event::NoEvent => (),
_ => return Ok(false)
}
let colors = match pos {
0 => ColorStar::from(star),
1..=7 => random_color(star),
p => hash_chars_as_color(star, &buf[..p])
};
write!(terminal.inner, "\r{} ", prompt)?;
colors.write(&terminal.inner)?;
Ok(false)
})?;
write!(terminal.inner, "\r")?;
terminal.inner.clear_to_line_end()?;
let buf = self.buf.as_mut();
Ok(&buf[..pos])
}
}