Simple Console Box Generator (Windows) in Rust

bg.rs

fn main() {
    generate_box(10, 4, 5, 4);
}

// ┌┐└┘─│
fn generate_box(x: i32, y: i32, width: i32, height: i32) {
    let mut nwidth = width - 2; // Corners included
    let mut nheight = height - 2;
    
    if nwidth < 2 { nwidth = 0; }
    if nheight < 2 { nheight = 0; }
    
    let mut line: String = String::new();
    for w in 0..nwidth { line.push('─'); }
    
    print_at(x, y, "┌");
    print!("{}", line);
    print!("┐");
    
    for h in 0..nheight + 1 {
        print_at(x, y + h + 1, "│");
    }
    let tx = x + width - 1;
    for h in 0..nheight + 1 {
        print_at(tx, y + h + 1, "│");
    }
    
    print_at(x, y + nheight + 1, "└");
    print!("{}", line);
    print!("┘");
}

// Windows - ESC[y;xH (Escape character - \x1B)
fn print_at(x: i32, y: i32, i: &str) {
    print!("\x1B[{};{}H{}", y, x, i);
}