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|
use textmode::Textmode as _;
pub struct Nbsh {
repl: crate::repl::Repl,
history: crate::history::History,
action: async_std::channel::Receiver<Action>,
}
impl Nbsh {
pub fn new() -> Self {
let (action_w, action_r) = async_std::channel::unbounded();
Self {
repl: crate::repl::Repl::new(action_w.clone()),
history: crate::history::History::new(action_w),
action: action_r,
}
}
pub async fn run(self) -> anyhow::Result<()> {
let mut input = textmode::Input::new().await?;
let mut output = textmode::Output::new().await?;
// avoid the guards getting stuck in a task that doesn't run to
// completion
let _input_guard = input.take_raw_guard();
let _output_guard = output.take_screen_guard();
let Self {
repl,
history,
action,
} = self;
let repl =
async_std::sync::Arc::new(async_std::sync::Mutex::new(repl));
let history =
async_std::sync::Arc::new(async_std::sync::Mutex::new(history));
let input_source = async_std::sync::Arc::new(
async_std::sync::Mutex::new(InputSource::Repl),
);
render(
&mut output,
&*repl.lock_arc().await,
&*history.lock_arc().await,
)
.await
.unwrap();
let action_history = async_std::sync::Arc::clone(&history);
let action_repl = async_std::sync::Arc::clone(&repl);
let action_input_source = async_std::sync::Arc::clone(&input_source);
async_std::task::spawn(async move {
while let Ok(action) = action.recv().await {
match action {
Action::Render => {
render(
&mut output,
&*action_repl.lock_arc().await,
&*action_history.lock_arc().await,
)
.await
.unwrap();
}
Action::Run(cmd) => {
action_history
.lock_arc()
.await
.run(&cmd)
.await
.unwrap();
}
Action::UpdateFocus(new_input_source) => {
*action_input_source.lock_arc().await =
new_input_source;
}
}
}
});
loop {
let input_source = *input_source.lock_arc().await;
match input_source {
InputSource::Repl => {
input.parse_utf8(true);
input.parse_ctrl(true);
input.parse_meta(true);
input.parse_special_keys(true);
input.parse_single(false);
}
InputSource::History(_) => {
input.parse_utf8(false);
input.parse_ctrl(false);
input.parse_meta(false);
input.parse_special_keys(false);
input.parse_single(false);
}
}
let key = input.read_key().await.unwrap();
if let Some(key) = key {
let quit = match input_source {
InputSource::Repl => {
repl.lock_arc().await.handle_key(key).await
}
InputSource::History(idx) => {
history.lock_arc().await.handle_key(key, idx).await
}
};
if quit {
break;
}
} else {
break;
}
}
Ok(())
}
}
async fn render(
out: &mut textmode::Output,
repl: &crate::repl::Repl,
history: &crate::history::History,
) -> anyhow::Result<()> {
out.clear();
history.render(out, repl.lines()).await?;
repl.render(out).await?;
out.refresh().await?;
Ok(())
}
#[derive(Copy, Clone, Debug)]
pub enum InputSource {
Repl,
History(usize),
}
pub enum Action {
Render,
Run(String),
UpdateFocus(InputSource),
}
|
