lsv 0.1.15

Three‑pane terminal file viewer (TUI) with preview and Lua configuration
Documentation 
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use ratatui::{
    layout::Rect,
    style::{
        Color,
        Style,
    },
    widgets::{
        Block,
        Borders,
        Clear,
        Paragraph,
    },
};

pub fn draw_command_pane(
    f: &mut ratatui::Frame,
    full: Rect,
    app: &crate::App,
)
{
    let (_is_cmd, show_suggest) = match app.overlay
    {
        crate::app::Overlay::CommandPane(ref st) =>
        {
            (st.prompt == ":", st.show_suggestions && st.prompt == ":")
        }
        _ => (false, false),
    };
    let mut want_rows: u16 = 1;
    if full.height >= 2
    {
        want_rows = 2;
    }
    if show_suggest && full.height >= 3
    {
        want_rows = 3;
    }
    let use_two = want_rows >= 2;
    let use_three = want_rows >= 3;
    let height = want_rows;
    let area = Rect {
        x: full.x,
        y: full.y + full.height.saturating_sub(height),
        width: full.width,
        height,
    };
    f.render_widget(Clear, area);
    let mut prompt = String::from(":");
    let mut input = String::new();
    let mut cursor_x = 0u16;
    let cursor_y = area.y + if use_two { 1 } else { 0 };
    if let crate::app::Overlay::CommandPane(ref st_box) = app.overlay
    {
        let st = st_box.as_ref();
        prompt = st.prompt.clone();
        input = st.input.clone();
        cursor_x = area.x + (prompt.len() as u16) + (st.cursor as u16);
    }
    let text = format!("{}{}", prompt, input);
    if use_two
    {
        let mut block = Block::default().borders(Borders::TOP);
        if let Some(th) = app.config.ui.theme.as_ref()
        {
            if let Some(bg) = th
                .pane_bg
                .as_ref()
                .and_then(|s| crate::ui::colors::parse_color(s))
            {
                block = block.style(Style::default().bg(bg));
            }
            if let Some(bfg) = th
                .border_fg
                .as_ref()
                .and_then(|s| crate::ui::colors::parse_color(s))
            {
                block = block.border_style(Style::default().fg(bfg));
            }
        }
        f.render_widget(block, area);
        let inner = Rect {
            x:      area.x,
            y:      area.y + 1,
            width:  area.width,
            height: 1,
        };
        let para = Paragraph::new(text);
        f.render_widget(para, inner);
        if use_three
        {
            let inner2 = Rect {
                x:      area.x,
                y:      area.y + 2,
                width:  area.width,
                height: 1,
            };
            // Build suggestions sorted alphabetically (case-insensitive)
            let prefix = input.trim();
            let mut matches: Vec<&str> = crate::commands::all()
                .iter()
                .copied()
                .filter(|c| prefix.is_empty() || c.starts_with(prefix))
                .collect();
            matches.sort_by_key(|a| a.to_lowercase());
            let line = if matches.is_empty()
            {
                String::from("<no matches>")
            }
            else
            {
                matches.join("  ")
            };
            let mut style = Style::default().fg(Color::DarkGray);
            if let Some(th) = app.config.ui.theme.as_ref()
                && let Some(fg) = th
                    .info_fg
                    .as_ref()
                    .and_then(|s| crate::ui::colors::parse_color(s))
            {
                style = Style::default().fg(fg);
            }
            let para2 = Paragraph::new(line).style(style);
            f.render_widget(para2, inner2);
        }
    }
    else
    {
        let para = Paragraph::new(text);
        f.render_widget(para, area);
    }
    f.set_cursor_position((
        cursor_x.min(area.x + area.width.saturating_sub(1)),
        cursor_y,
    ));
}