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use async_std::io::ReadExt as _;
use pty_process::Command as _;
use textmode::Textmode as _;
#[derive(Default)]
pub struct History {
entries: Vec<async_std::sync::Arc<async_std::sync::Mutex<HistoryEntry>>>,
}
impl History {
pub fn new() -> Self {
Self::default()
}
pub async fn run(
&mut self,
cmd: &str,
render: async_std::channel::Sender<()>,
) -> anyhow::Result<()> {
let (exe, args) = parse_cmd(cmd);
let mut process = async_process::Command::new(&exe);
process.args(&args);
let child = process
.spawn_pty(Some(&pty_process::Size::new(24, 80)))
.unwrap();
let entry = async_std::sync::Arc::new(async_std::sync::Mutex::new(
HistoryEntry::new(cmd),
));
let task_entry = async_std::sync::Arc::clone(&entry);
let task_render = render.clone();
async_std::task::spawn(async move {
loop {
let mut buf = [0_u8; 4096];
match child.pty().read(&mut buf).await {
Ok(bytes) => {
task_entry.lock_arc().await.vt.process(&buf[..bytes]);
}
Err(e) => {
if e.raw_os_error() != Some(libc::EIO) {
eprintln!("pty read failed: {:?}", e);
}
task_entry.lock_arc().await.running = false;
task_render.send(()).await.unwrap();
break;
}
}
task_render.send(()).await.unwrap();
}
});
self.entries.push(entry);
render.send(()).await.unwrap();
Ok(())
}
pub async fn render(
&self,
out: &mut textmode::Output,
repl_lines: usize,
) -> anyhow::Result<()> {
let mut used_lines = repl_lines;
for entry in self.entries.iter().rev() {
let entry = entry.lock_arc().await;
let screen = entry.vt.screen();
let mut last_row = 0;
for (idx, row) in screen.rows(0, 80).enumerate() {
if !row.is_empty() {
last_row = idx + 1;
}
}
used_lines += 1 + std::cmp::min(6, last_row);
if used_lines > 24 {
break;
}
out.move_to((24 - used_lines).try_into().unwrap(), 0);
out.write_str("$ ");
if entry.running {
out.set_bgcolor(vt100::Color::Rgb(16, 64, 16));
}
out.write_str(&entry.cmd);
out.reset_attributes();
out.write(b"\r\n");
if last_row > 5 {
out.set_bgcolor(textmode::color::RED);
out.write(b"...");
out.reset_attributes();
out.write(b"\r\n");
}
for row in screen
.rows_formatted(0, 80)
.take(last_row)
.skip(last_row.saturating_sub(5))
{
out.write(&row);
out.write(b"\r\n");
}
out.reset_attributes();
}
Ok(())
}
}
struct HistoryEntry {
cmd: String,
vt: vt100::Parser,
running: bool, // option end time
// start time
}
impl HistoryEntry {
fn new(cmd: &str) -> Self {
Self {
cmd: cmd.into(),
vt: vt100::Parser::new(24, 80, 0),
running: true,
}
}
}
fn parse_cmd(full_cmd: &str) -> (String, Vec<String>) {
let mut parts = full_cmd.split(' ');
let cmd = parts.next().unwrap();
(
cmd.to_string(),
parts.map(std::string::ToString::to_string).collect(),
)
}
|
