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Ratatui

Full example on GitHub

Ratatui already has a good bridge for ANSI-colored text: ansi-to-tui. Lumis already emits ANSI. So the clean integration path is:

  1. highlight with Lumis terminal output
  2. convert ANSI to ratatui::text::Text
  3. render that text in a widget

That gives you syntax highlighting in terminal UIs without a custom Lumis formatter just for Ratatui.

Add dependencies​

[dependencies]

lumis = "0.7"

ratatui = "0.29"

ansi-to-tui = "8"

Highlight and render​

use ansi_to_tui::IntoText;

use lumis::{formatters::Formatter, languages::Language, themes, TerminalBuilder};

use ratatui::widgets::{Block, Paragraph};



fn code_paragraph(source: &str, language: Language) -> Paragraph<'static> {

    let theme = themes::get("dracula").unwrap();

    let formatter = TerminalBuilder::new()

        .language(language)

        .theme(Some(theme))

        .build()

        .unwrap();



    let mut output = Vec::new();

    formatter.format(source, &mut output).unwrap();

    let ansi = String::from_utf8(output).unwrap();

    let text = ansi.into_text().unwrap();



    Paragraph::new(text).block(Block::bordered().title("main.rs"))

}

Use a dark theme (like dracula) for terminal UIs since they render on a dark background.