vle 1.19.2

Very Little Editor - an exercise in minimalist text editing
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// Copyright 2026 Brian Langenberger
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use crate::highlighter;
use crate::syntax::{Commenting, Highlight, Plain, color};
use logos::Logos;
use ratatui::style::Color;

#[derive(Logos, Debug)]
#[logos(skip r"[ \t\n]+")]
enum CssToken {
    #[regex(r"[[:alpha:]-]*: ")]
    Property,
    #[token("/*")]
    StartComment,
    #[token("*/")]
    EndComment,
    #[token("{")]
    #[token("}")]
    #[token(";")]
    Syntax,
    #[regex(r"\.[[:alpha:]-]+")]
    Class,
    #[regex(r"#[[:alpha:]-]+")]
    Id,
    #[regex(r"\[[[:alpha:]-]+\]")]
    #[regex(r#"\[[[:alpha:]-]+=\".*?\"\]"#)]
    #[regex(r#"\[[[:alpha:]-]+~=\".*?\"\]"#)]
    #[regex(r#"\[[[:alpha:]-]+\|=\".*?\"\]"#)]
    #[regex(r#"\[[[:alpha:]-]+\^=\".*?\"\]"#)]
    #[regex(r#"\[[[:alpha:]-]+\$=\".*?\"\]"#)]
    #[regex(r#"\[[[:alpha:]-]+\*=\".*?\"\]"#)]
    Attribute,
}

impl TryFrom<CssToken> for Highlight {
    type Error = ();

    fn try_from(t: CssToken) -> Result<Highlight, ()> {
        match t {
            CssToken::Property => Ok(Color::Blue.into()),
            CssToken::StartComment | CssToken::EndComment => Ok(color::COMMENT),
            CssToken::Syntax => Ok(Color::Green.into()),
            CssToken::Class => Ok(Color::Red.into()),
            CssToken::Id => Ok(Color::Magenta.into()),
            CssToken::Attribute => Ok(Color::Red.into()),
        }
    }
}

#[derive(Debug)]
pub struct Css;

impl std::fmt::Display for Css {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        "CSS".fmt(f)
    }
}

highlighter!(
    Css,
    CssToken,
    StartComment,
    EndComment,
    "/*",
    "*/",
    color::COMMENT
);