#![allow(clippy::unwrap_used)]// This file is copied from https://github.com/wezterm/wezterm (MIT license).// Copyright (c) 2018-Present Wez Furlong// Permission is hereby granted, free of charge, to any person obtaining a copy// of this software and associated documentation files (the "Software"), to deal// in the Software without restriction, including without limitation the rights// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell// copies of the Software, and to permit persons to whom the Software is// furnished to do so, subject to the following conditions:// The above copyright notice and this permission notice shall be included in// all copies or substantial portions of the Software.// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE// SOFTWARE.use crate::win::psuedocon::PsuedoCon;use anyhow::Error;use filedescriptor::FileDescriptor;use filedescriptor::Pipe;use portable_pty::Child;use portable_pty::MasterPty;use portable_pty::PtyPair;use portable_pty::PtySize;use portable_pty::PtySystem;use portable_pty::SlavePty;use portable_pty::cmdbuilder::CommandBuilder;use std::mem::ManuallyDrop;use std::os::windows::io::RawHandle;use std::ptr;use std::sync::Arc;use std::sync::Mutex;use winapi::um::wincon::COORD;#[derive(Default)]pub struct ConPtySystem {}fn create_conpty_handles(    size: PtySize,) -> anyhow::Result<(PsuedoCon, FileDescriptor, FileDescriptor)> {    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,    )?;    Ok((con, stdin.write, stdout.read))}pub struct RawConPty {    con: PsuedoCon,    input_write: FileDescriptor,    output_read: FileDescriptor,}impl RawConPty {    pub fn new(cols: i16, rows: i16) -> anyhow::Result<Self> {        let (con, input_write, output_read) = create_conpty_handles(PtySize {            rows: rows as u16,            cols: cols as u16,            pixel_width: 0,            pixel_height: 0,        })?;        Ok(Self {            con,            input_write,            output_read,        })    }    pub fn pseudoconsole_handle(&self) -> RawHandle {        self.con.raw_handle()    }    pub fn into_handles(self) -> (PsuedoCon, FileDescriptor, FileDescriptor) {        let me = ManuallyDrop::new(self);        unsafe {            (                ptr::read(&me.con),                ptr::read(&me.input_write),                ptr::read(&me.output_read),            )        }    }}impl PtySystem for ConPtySystem {    fn openpty(&self, size: PtySize) -> anyhow::Result<PtyPair> {        let (con, writable, readable) = create_conpty_handles(size)?;        let master = ConPtyMasterPty {            inner: Arc::new(Mutex::new(Inner {                con,                readable,                writable: Some(writable),                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)    }    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))    }}