// Simple ANSI color library.
//
// TODO: Windows support.
const color_black: u8 = 0u8;

const color_red: u8 = 1u8;

const color_green: u8 = 2u8;

const color_yellow: u8 = 3u8;

const color_blue: u8 = 4u8;

const color_magenta: u8 = 5u8;

const color_cyan: u8 = 6u8;

const color_light_gray: u8 = 7u8;

const color_light_grey: u8 = 7u8;

const color_dark_gray: u8 = 8u8;

const color_dark_grey: u8 = 8u8;

const color_bright_red: u8 = 9u8;

const color_bright_green: u8 = 10u8;

const color_bright_yellow: u8 = 11u8;

const color_bright_blue: u8 = 12u8;

const color_bright_magenta: u8 = 13u8;

const color_bright_cyan: u8 = 14u8;

const color_bright_white: u8 = 15u8;

fn esc(writer: io::buf_writer) { writer.write([0x1bu8, '[' as u8]); }

fn reset(writer: io::buf_writer) {
    esc(writer);
    writer.write(['0' as u8, 'm' as u8]);
}

fn color_supported() -> bool {
    let supported_terms = [~"xterm-color", ~"xterm", ~"screen-bce"];
    ret alt generic_os::getenv(~"TERM") {
          option::some(env) {
            for term: istr in supported_terms {
                if istr::eq(term, env) { ret true; }
            }
            false
          }
          option::none. { false }
        };
}

fn set_color(writer: io::buf_writer, first_char: u8, color: u8) {
    assert (color < 16u8);
    esc(writer);
    if color >= 8u8 { writer.write(['1' as u8, ';' as u8]); color -= 8u8; }
    writer.write([first_char, ('0' as u8) + color, 'm' as u8]);
}

fn fg(writer: io::buf_writer, color: u8) {
    ret set_color(writer, '3' as u8, color);
}

fn bg(writer: io::buf_writer, color: u8) {
    ret set_color(writer, '4' as u8, color);
}
// export fg;
// export bg;

// Local Variables:
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
// End: