theme-engine

theme-engine resolves highlight capture names to concrete styles (fg/bg RGB + bold/italic/underline) with normalization and fallback.

Features

• Capture key normalization:
  • @comment and comment resolve the same key.
• Hierarchical fallback:
  • comment.documentation -> comment -> normal
• Built-in themes:
  • tokyonight-dark
  • tokyonight-light
  • solarized-dark
  • solarized-light
• Theme loading from JSON and TOML strings.

Quick Example

use theme_engine::load_theme;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let theme = load_theme("tokyo-night")?;
    let style = theme.resolve("@comment.documentation");
    println!("style found: {}", style.is_some());
    Ok(())
}

Custom Theme Example

use theme_engine::Theme;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let theme = Theme::from_json_str(r#"
    {
      "styles": {
        "normal": { "fg": { "r": 220, "g": 220, "b": 220 } },
        "number": { "fg": { "r": 255, "g": 180, "b": 120 } }
      }
    }
    "#)?;

    let style = theme.resolve("number");
    println!("style found: {}", style.is_some());
    Ok(())
}