cells/src/main.rs

use eframe::egui;

fn main() -> eframe::Result {
    let options = eframe::NativeOptions {
        viewport: egui::ViewportBuilder::default().with_inner_size([1024.0, 768.0]),
        ..Default::default()
    };

    let mut code = String::new();

    eframe::run_simple_native("Cells", options, move |ctx, _frame| {
        egui::CentralPanel::default().show(ctx, |ui| {
            let theme = egui_extras::syntax_highlighting::CodeTheme::from_memory(ui.ctx());
            let mut layouter = |ui: &egui::Ui, string: &str, wrap_width: f32| {
                let mut layout_job =
                    egui_extras::syntax_highlighting::highlight(ui.ctx(), &theme, string, "Python");
                layout_job.wrap.max_width = wrap_width;
                layout_job.sections = layout_job
                    .sections
                    .iter()
                    .map(|layout_section| {
                        let mut section = layout_section.clone();
                        section.format.font_id = egui::FontId::monospace(16.0);
                        section
                    })
                    .collect();
                ui.fonts(|f| f.layout_job(layout_job))
            };
            ui.add(
                egui::TextEdit::multiline(&mut code)
                    .code_editor()
                    .desired_rows(4)
                    .lock_focus(true)
                    .desired_width(f32::INFINITY)
                    .layouter(&mut layouter)
                    .font(egui::FontId::monospace(16.0)),
            );
        });
    })
}