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use crate::cmdbuilder::CommandBuilder;
use crate::win::psuedocon::PsuedoCon;
use crate::{Child, MasterPty, PtyPair, PtySize, PtySystem, SlavePty};
use anyhow::Error;
use filedescriptor::{FileDescriptor, Pipe};
use std::sync::{Arc, Mutex};
use winapi::um::wincon::COORD;
#[derive(Default)]
pub struct ConPtySystem {}
impl PtySystem for ConPtySystem {
fn openpty(&self, size: PtySize) -> anyhow::Result<PtyPair> {
let stdin = Pipe::new()?;
let stdout = Pipe::new()?;
let con = PsuedoCon::new(
COORD {
X: size.cols as i16,
Y: size.rows as i16,
},
stdin.read,
stdout.write,
)?;
let master = ConPtyMasterPty {
inner: Arc::new(Mutex::new(Inner {
con,
readable: stdout.read,
writable: Some(stdin.write),
size,
})),
};
let slave = ConPtySlavePty {
inner: master.inner.clone(),
};
Ok(PtyPair {
master: Box::new(master),
slave: Box::new(slave),
})
}
}
struct Inner {
con: PsuedoCon,
readable: FileDescriptor,
writable: Option<FileDescriptor>,
size: PtySize,
}
impl Inner {
pub fn resize(
&mut self,
num_rows: u16,
num_cols: u16,
pixel_width: u16,
pixel_height: u16,
) -> Result<(), Error> {
self.con.resize(COORD {
X: num_cols as i16,
Y: num_rows as i16,
})?;
self.size = PtySize {
rows: num_rows,
cols: num_cols,
pixel_width,
pixel_height,
};
Ok(())
}
}
#[derive(Clone)]
pub struct ConPtyMasterPty {
inner: Arc<Mutex<Inner>>,
}
pub struct ConPtySlavePty {
inner: Arc<Mutex<Inner>>,
}
impl MasterPty for ConPtyMasterPty {
fn resize(&self, size: PtySize) -> anyhow::Result<()> {
let mut inner = self.inner.lock().unwrap();
inner.resize(size.rows, size.cols, size.pixel_width, size.pixel_height)
}
fn get_size(&self) -> Result<PtySize, Error> {
let inner = self.inner.lock().unwrap();
Ok(inner.size.clone())
}
fn try_clone_reader(&self) -> anyhow::Result<Box<dyn std::io::Read + Send>> {
Ok(Box::new(self.inner.lock().unwrap().readable.try_clone()?))
}
fn take_writer(&self) -> anyhow::Result<Box<dyn std::io::Write + Send>> {
Ok(Box::new(
self.inner
.lock()
.unwrap()
.writable
.take()
.ok_or_else(|| anyhow::anyhow!("writer already taken"))?,
))
}
}
impl SlavePty for ConPtySlavePty {
fn spawn_command(&self, cmd: CommandBuilder) -> anyhow::Result<Box<dyn Child + Send + Sync>> {
let inner = self.inner.lock().unwrap();
let child = inner.con.spawn_command(cmd)?;
Ok(Box::new(child))
}
}
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