129 lines
4.2 KiB
Rust
129 lines
4.2 KiB
Rust
use std::io::Write;
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fn main() -> Result<(), lexopt::Error> {
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let args = Args::parse()?;
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let stdout = anstream::stdout();
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let mut stdout = stdout.lock();
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for fixed in 0..16 {
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let style = style(fixed, args.layer, args.effects);
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let _ = print_number(&mut stdout, fixed, style);
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if fixed == 7 || fixed == 15 {
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let _ = writeln!(&mut stdout);
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}
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}
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for r in 0..6 {
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let _ = writeln!(stdout);
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for g in 0..6 {
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for b in 0..6 {
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let fixed = r * 36 + g * 6 + b + 16;
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let style = style(fixed, args.layer, args.effects);
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let _ = print_number(&mut stdout, fixed, style);
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}
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let _ = writeln!(stdout);
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}
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}
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for c in 0..24 {
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if 0 == c % 8 {
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let _ = writeln!(stdout);
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}
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let fixed = 232 + c;
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let style = style(fixed, args.layer, args.effects);
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let _ = print_number(&mut stdout, fixed, style);
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}
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Ok(())
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}
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fn style(fixed: u8, layer: Layer, effects: anstyle::Effects) -> anstyle::Style {
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let color = anstyle::Ansi256Color(fixed).into();
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(match layer {
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Layer::Fg => anstyle::Style::new().fg_color(Some(color)),
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Layer::Bg => anstyle::Style::new().bg_color(Some(color)),
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Layer::Underline => anstyle::Style::new().underline_color(Some(color)),
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}) | effects
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}
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fn print_number(stdout: &mut impl Write, fixed: u8, style: anstyle::Style) -> std::io::Result<()> {
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write!(
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stdout,
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"{}{:>4}{}",
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style.render(),
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fixed,
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anstyle::Reset.render()
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)
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}
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#[derive(Default)]
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struct Args {
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effects: anstyle::Effects,
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layer: Layer,
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}
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#[derive(Copy, Clone, Default)]
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enum Layer {
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#[default]
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Fg,
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Bg,
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Underline,
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}
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impl Args {
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fn parse() -> Result<Self, lexopt::Error> {
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use lexopt::prelude::*;
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let mut res = Args::default();
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let mut args = lexopt::Parser::from_env();
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while let Some(arg) = args.next()? {
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match arg {
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Long("layer") => {
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res.layer = args.value()?.parse_with(|s| match s {
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"fg" => Ok(Layer::Fg),
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"bg" => Ok(Layer::Bg),
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"underline" => Ok(Layer::Underline),
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_ => Err("expected values fg, bg, underline"),
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})?;
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}
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Long("effect") => {
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const EFFECTS: [(&str, anstyle::Effects); 12] = [
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("bold", anstyle::Effects::BOLD),
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("dimmed", anstyle::Effects::DIMMED),
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("italic", anstyle::Effects::ITALIC),
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("underline", anstyle::Effects::UNDERLINE),
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("double_underline", anstyle::Effects::DOUBLE_UNDERLINE),
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("curly_underline", anstyle::Effects::CURLY_UNDERLINE),
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("dotted_underline", anstyle::Effects::DOTTED_UNDERLINE),
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("dashed_underline", anstyle::Effects::DASHED_UNDERLINE),
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("blink", anstyle::Effects::BLINK),
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("invert", anstyle::Effects::INVERT),
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("hidden", anstyle::Effects::HIDDEN),
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("strikethrough", anstyle::Effects::STRIKETHROUGH),
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];
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let effect = args.value()?.parse_with(|s| {
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EFFECTS
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.into_iter()
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.find(|(name, _)| *name == s)
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.map(|(_, effect)| effect)
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.ok_or_else(|| {
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format!(
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"expected one of {}",
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EFFECTS
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.into_iter()
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.map(|(n, _)| n)
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.collect::<Vec<_>>()
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.join(", ")
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)
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})
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})?;
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res.effects = res.effects.insert(effect);
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}
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_ => return Err(arg.unexpected()),
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}
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}
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Ok(res)
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}
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}
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