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use crate::common::{Prompt, Result};
use crate::config::Config;
use crate::events::Event;
use async_std::channel::Sender;
use async_std::io;
use async_std::prelude::*;
use termion::event::Key;
use termion::input::TermRead;
pub async fn task<R>(
config: Config,
mut input: R,
engine_sender: Sender<Event>,
screen_sender: Sender<Event>,
) -> Result<()>
where
R: io::Read + Unpin + Send + 'static,
{
log::trace!("starting to read person's input");
let mut buffer;
let mut query_updated: bool;
let mut prompt: Prompt;
if let Some(q) = &config.initial_query {
prompt = q.into();
engine_sender.send(Event::Search(prompt.clone())).await?;
screen_sender.send(Event::Search(prompt.clone())).await?;
} else {
prompt = Default::default();
}
'event: loop {
buffer = vec![0; 10];
query_updated = false;
let num = input.read(&mut buffer).await?;
let keys = keys(&mut buffer, num);
for key in keys {
match key {
Key::Ctrl('p') | Key::Up => {
screen_sender.send(Event::Up).await?;
}
Key::Ctrl('n') | Key::Down => {
screen_sender.send(Event::Down).await?;
}
Key::Esc | Key::Alt('\u{0}') => {
screen_sender.send(Event::Exit).await?;
engine_sender.send(Event::Exit).await?;
break 'event;
}
Key::Char('\n') => {
screen_sender.send(Event::Done).await?;
engine_sender.send(Event::Done).await?;
break 'event;
}
Key::Ctrl('u') => {
prompt.clear();
query_updated = true;
}
Key::Backspace => {
query_updated = prompt.backspace();
}
Key::Char(ch) => {
prompt.add(ch);
query_updated = true;
}
Key::Left => {
prompt.left();
screen_sender.send(Event::Search(prompt.clone())).await?;
}
Key::Right => {
prompt.right();
screen_sender.send(Event::Search(prompt.clone())).await?;
}
Key::Ctrl('a') => {
prompt.cursor_at_start();
screen_sender.send(Event::Search(prompt.clone())).await?;
}
Key::Ctrl('e') => {
prompt.cursor_at_end();
screen_sender.send(Event::Search(prompt.clone())).await?;
}
_ => (),
}
}
if query_updated {
screen_sender.send(Event::Search(prompt.clone())).await?;
engine_sender.send(Event::Search(prompt.clone())).await?;
}
}
log::trace!("person's input done");
Ok(())
}
fn keys(buffer: &mut Vec<u8>, num: usize) -> Vec<Key> {
let tmp: Vec<u8> = buffer.iter().take(num).copied().collect();
tmp.keys()
.filter(|k| k.is_ok())
.map(|k| k.unwrap())
.collect()
}