mirror of https://github.com/rm-dr/daisy
Reworked prompt
parent
a23cea274f
commit
0eec282cc2
GPG Key ID:
AD62BB059C2AAEE4
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@ -2,12 +2,18 @@
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "bitflags"
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version = "1.3.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
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[[package]]
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name = "calc"
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version = "0.1.0"
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dependencies = [
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"signal-hook",
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"termcolor",
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"termion",
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]
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[[package]]
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@ -16,6 +22,30 @@ version = "0.2.140"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
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[[package]]
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name = "numtoa"
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version = "0.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b8f8bdf33df195859076e54ab11ee78a1b208382d3a26ec40d142ffc1ecc49ef"
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[[package]]
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name = "redox_syscall"
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version = "0.2.16"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
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dependencies = [
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"bitflags",
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]
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[[package]]
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name = "redox_termios"
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version = "0.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8440d8acb4fd3d277125b4bd01a6f38aee8d814b3b5fc09b3f2b825d37d3fe8f"
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dependencies = [
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"redox_syscall",
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]
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[[package]]
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name = "signal-hook"
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version = "0.3.15"
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@ -36,41 +66,13 @@ dependencies = [
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]
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[[package]]
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name = "termcolor"
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version = "1.2.0"
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name = "termion"
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version = "2.0.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "be55cf8942feac5c765c2c993422806843c9a9a45d4d5c407ad6dd2ea95eb9b6"
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checksum = "659c1f379f3408c7e5e84c7d0da6d93404e3800b6b9d063ba24436419302ec90"
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dependencies = [
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"winapi-util",
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"libc",
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"numtoa",
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"redox_syscall",
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"redox_termios",
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]
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[[package]]
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name = "winapi"
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version = "0.3.9"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
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dependencies = [
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"winapi-i686-pc-windows-gnu",
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"winapi-x86_64-pc-windows-gnu",
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]
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[[package]]
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name = "winapi-i686-pc-windows-gnu"
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version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
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[[package]]
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name = "winapi-util"
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version = "0.1.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
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dependencies = [
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"winapi",
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]
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[[package]]
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name = "winapi-x86_64-pc-windows-gnu"
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version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
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@ -15,7 +15,5 @@ panic = "abort"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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#dialoguer = "0.10.3"
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#colored = "2.0.0"
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termcolor = "1.2.0"
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signal-hook = "0.3.15"
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termion = "2.0.1"
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165
src/main.rs
165
src/main.rs
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@ -1,110 +1,103 @@
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use std::io;
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use std::io::Write;
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//use std::io::Read;
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use std::sync::Arc;
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use std::sync::atomic::{AtomicBool, Ordering};
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use termcolor::{
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Color,
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ColorChoice,
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ColorSpec,
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StandardStream,
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WriteColor
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};
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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::Token;
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//use crate::parser::ParserError;
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use crate::parser::LineLocation;
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const PROMPT_PREFIX: &str = "==> ";
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/// Show a prompt and save trimmed input to `input`.
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///
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/// # Arguments:
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///
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/// * `stdout`: Where we should write the prompt
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/// * `input`: Where we should save user input
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///
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/// # Example usage:
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/// ```
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/// let mut input = String::new();
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/// prompt(&mut stdout, &mut input)?;
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/// ```
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fn prompt(
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stdout: &mut StandardStream,
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input: &mut String
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) -> Result<(), std::io::Error> {
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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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// Print colored prompt prefix
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stdout.set_color(ColorSpec::new().set_fg(Some(Color::Blue)))?;
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write!(*stdout, "{PROMPT_PREFIX}")?;
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stdout.reset()?; // reset colors
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stdout.flush()?; // flush, we didn't print a full line yet.
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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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// Ask for input
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io::stdin().read_line(input)?;
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// If this input doesn't end with a newline,
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// the user terminated this prompt with ctrl-d.
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// Add a newline to keep spacing consistent,
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// and clear the input.
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if match input.chars().last() {
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Some(val) => val != '\n',
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None => true
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} {
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write!(*stdout, "\n")?;
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input.clear();
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} else {
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(*input) = input.trim().to_string();
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return Ok(());
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}
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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 mut stdout = StandardStream::stdout(ColorChoice::Always);
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//let size = termion::terminal_size().unwrap();
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//write!(stdout, "{:?}", size).unwrap();
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let term = Arc::new(AtomicBool::new(false));
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signal_hook::flag::register(signal_hook::consts::SIGINT, Arc::clone(&term))?;
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while !term.load(Ordering::Relaxed) {
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let mut input = String::with_capacity(64);
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prompt(&mut stdout, &mut input).expect("Could not show prompt");
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let input = input;
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let mut s: String = String::with_capacity(64);
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// Ignore empty input
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if input == "" {
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stdout.flush()?;
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continue;
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}
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'outer: loop {
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// Parse input.
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// Fail if we encounter invalid characters.
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let g: Token = match parser::parse(&input) {
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Ok(g) => g,
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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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let s = " ";
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let m = "^";
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println!("{}{} {:?}", s.repeat(pos + 4), m.repeat(len), e);
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stdout.flush()?;
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continue;
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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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stdout.set_color(ColorSpec::new().set_fg(Some(Color::Green)))?;
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write!(stdout, "\n => ")?;
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stdout.reset()?;
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write!(stdout, "Got {input}\n\n\n")?;
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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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writeln!(stdout, "Tokenized: {g:#?}")?;
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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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writeln!(stdout, "Exiting.")?;
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Ok(())
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write!(stdout, "\r\n")?;
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return Ok(());
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}
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@ -211,15 +211,18 @@ pub fn tokenize(input: &String) -> Result<Token, (LineLocation, ParserError)> {
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// Operator
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// Always one character
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'+' | '*' | '/' | '^' | '%' => {
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'*'|'×'|
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'/'|'÷'|
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'+'|'%'|'^' => {
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push_token(g_now, i, t)?;
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t = Some(Token::PreOperator(
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LineLocation{pos: i, len: 1},
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match c {
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'^' => Operators::Power,
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'%' => Operators::Modulo,
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'*' => Operators::Multiply,
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'/' => Operators::Divide,
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'*'|'×' => Operators::Multiply,
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'/'|'÷' => Operators::Divide,
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'+' => Operators::Add,
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_ => panic!()
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}
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