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|
use super::MarkdownRender;
use crate::repl::{ReplyStreamEvent, SharedAbortSignal};
use anyhow::Result;
use crossbeam::channel::Receiver;
use crossterm::{
cursor,
event::{self, Event, KeyCode, KeyModifiers},
queue, style,
terminal::{self, disable_raw_mode, enable_raw_mode},
};
use std::{
io::{self, Stdout, Write},
time::{Duration, Instant},
};
use unicode_width::UnicodeWidthStr;
#[allow(clippy::module_name_repetitions)]
pub fn repl_render_stream(
rx: &Receiver<ReplyStreamEvent>,
light_theme: bool,
abort: &SharedAbortSignal,
) -> Result<()> {
enable_raw_mode()?;
let mut stdout = io::stdout();
let ret = repl_render_stream_inner(rx, light_theme, abort, &mut stdout);
disable_raw_mode()?;
ret
}
fn repl_render_stream_inner(
rx: &Receiver<ReplyStreamEvent>,
light_theme: bool,
abort: &SharedAbortSignal,
writer: &mut Stdout,
) -> Result<()> {
let mut last_tick = Instant::now();
let tick_rate = Duration::from_millis(50);
let mut buffer = String::new();
let mut markdown_render = MarkdownRender::new(light_theme);
let columns = terminal::size()?.0;
loop {
if abort.aborted() {
return Ok(());
}
if let Ok(evt) = rx.try_recv() {
match evt {
ReplyStreamEvent::Text(text) => {
if !buffer.is_empty() {
let buffer_width = buffer.width() as u16;
let need_rows = (buffer_width + columns - 1) / columns;
let (col, row) = cursor::position()?;
if row + 1 >= need_rows {
if col == 0 {
queue!(writer, cursor::MoveTo(0, row - need_rows))?;
} else {
queue!(writer, cursor::MoveTo(0, row + 1 - need_rows))?;
}
} else {
queue!(
writer,
terminal::ScrollUp(need_rows - 1 - row),
cursor::MoveTo(0, 0)
)?;
}
}
if text.contains('\n') {
let text = format!("{buffer}{text}");
let mut lines: Vec<&str> = text.split('\n').collect();
buffer = lines.pop().unwrap_or_default().to_string();
let output = markdown_render.render_block(&lines.join("\n"));
for line in output.split('\n') {
queue!(
writer,
style::Print(line),
style::Print("\n"),
cursor::MoveLeft(columns),
)?;
}
queue!(writer, style::Print(&buffer),)?;
} else {
buffer = format!("{buffer}{text}");
let output = markdown_render.render_line(&buffer);
queue!(writer, style::Print(&output))?;
}
writer.flush()?;
}
ReplyStreamEvent::Done => {
queue!(writer, style::Print("\n"))?;
writer.flush()?;
break;
}
}
continue;
}
let timeout = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or_else(|| Duration::from_secs(0));
if crossterm::event::poll(timeout)? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('c') if key.modifiers == KeyModifiers::CONTROL => {
abort.set_ctrlc();
return Ok(());
}
KeyCode::Char('d') if key.modifiers == KeyModifiers::CONTROL => {
abort.set_ctrld();
return Ok(());
}
_ => {}
}
}
}
if last_tick.elapsed() >= tick_rate {
last_tick = Instant::now();
}
}
Ok(())
}
|
