mirror of
https://github.com/rm-dr/daisy
synced 2025-07-11 23:19:32 -07:00
103 lines
2.3 KiB
Rust
103 lines
2.3 KiB
Rust
use std::io::{Write, stdout, stdin};
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use termion::event::Key;
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use termion::input::TermRead;
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use termion::raw::IntoRawMode;
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use termion::raw::RawTerminal;
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use termion::{color, style};
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mod parser;
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//use crate::parser::Token;
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//use crate::parser::ParserError;
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use crate::parser::LineLocation;
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fn draw_line(stdout: &mut RawTerminal<std::io::Stdout>, s: &String) -> Result<(), std::io::Error> {
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write!(
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stdout,
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"\r{}{}==>{}{} {s} {}",
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style::Bold,
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color::Fg(color::Blue),
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color::Fg(color::Reset),
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style::Reset,
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// Our string can change by at most one character each iteration.
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// Clearing is done by inserting an extra space, then moving the cursor left.
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termion::cursor::Left(1)
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)?;
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stdout.flush()?;
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return Ok(());
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}
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fn main() -> Result<(), std::io::Error> {
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let mut stdout = stdout().into_raw_mode().unwrap();
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//let size = termion::terminal_size().unwrap();
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//write!(stdout, "{:?}", size).unwrap();
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let mut s: String = String::with_capacity(64);
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'outer: loop {
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s.clear();
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draw_line(&mut stdout, &s)?;
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let stdin = stdin();
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for c in stdin.keys() {
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if let Key::Char(q) = c.as_ref().unwrap() {
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match q {
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'\n' => {
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let s = s.trim().to_string();
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if s == "" { write!(stdout, "\r\n")?; break; }
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RawTerminal::suspend_raw_mode(&stdout)?;
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write!(stdout, "\n")?;
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let g = parser::parse(&s);
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RawTerminal::activate_raw_mode(&stdout)?;
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match g {
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Ok(g) => {
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RawTerminal::suspend_raw_mode(&stdout)?;
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writeln!(stdout, "Tokenized: {g:#?}")?;
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RawTerminal::activate_raw_mode(&stdout)?;
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},
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Err((l, e)) => {
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let LineLocation{pos, len} = l;
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write!(
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stdout,
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"{}{}{} {e:?}{}\r\n",
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color::Fg(color::Red),
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" ".repeat(pos + 4),
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"^".repeat(len),
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color::Fg(color::Reset),
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)?;
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}
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};
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break;
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},
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'/' => { s.push('÷'); },
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'*' => { s.push('×'); },
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_ => { s.push(*q); }
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};
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} else {
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match c.unwrap() {
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Key::Backspace => { s.pop(); },
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Key::Delete => { s.pop(); },
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Key::Left => {},
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Key::Right => {},
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Key::Up => {},
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Key::Down => {},
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Key::Ctrl('d') |
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Key::Ctrl('c') => { break 'outer; },
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_ => {}
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};
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};
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draw_line(&mut stdout, &s)?;
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}
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}
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write!(stdout, "\r\n")?;
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return Ok(());
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} |