| //! Simple ANSI color library |
| #[forbid(deprecated_mode)]; |
| |
| use core::Option; |
| |
| // FIXME (#2807): Windows support. |
| |
| pub const color_black: u8 = 0u8; |
| pub const color_red: u8 = 1u8; |
| pub const color_green: u8 = 2u8; |
| pub const color_yellow: u8 = 3u8; |
| pub const color_blue: u8 = 4u8; |
| pub const color_magenta: u8 = 5u8; |
| pub const color_cyan: u8 = 6u8; |
| pub const color_light_gray: u8 = 7u8; |
| pub const color_light_grey: u8 = 7u8; |
| pub const color_dark_gray: u8 = 8u8; |
| pub const color_dark_grey: u8 = 8u8; |
| pub const color_bright_red: u8 = 9u8; |
| pub const color_bright_green: u8 = 10u8; |
| pub const color_bright_yellow: u8 = 11u8; |
| pub const color_bright_blue: u8 = 12u8; |
| pub const color_bright_magenta: u8 = 13u8; |
| pub const color_bright_cyan: u8 = 14u8; |
| pub const color_bright_white: u8 = 15u8; |
| |
| pub fn esc(writer: io::Writer) { writer.write(~[0x1bu8, '[' as u8]); } |
| |
| /// Reset the foreground and background colors to default |
| pub fn reset(writer: io::Writer) { |
| esc(writer); |
| writer.write(~['0' as u8, 'm' as u8]); |
| } |
| |
| /// Returns true if the terminal supports color |
| pub fn color_supported() -> bool { |
| let supported_terms = ~[~"xterm-color", ~"xterm", |
| ~"screen-bce", ~"xterm-256color"]; |
| return match os::getenv(~"TERM") { |
| option::Some(ref env) => { |
| for vec::each(supported_terms) |term| { |
| if *term == *env { return true; } |
| } |
| false |
| } |
| option::None => false |
| }; |
| } |
| |
| pub fn set_color(writer: io::Writer, first_char: u8, color: u8) { |
| assert (color < 16u8); |
| esc(writer); |
| let mut color = color; |
| if color >= 8u8 { writer.write(~['1' as u8, ';' as u8]); color -= 8u8; } |
| writer.write(~[first_char, ('0' as u8) + color, 'm' as u8]); |
| } |
| |
| /// Set the foreground color |
| pub fn fg(writer: io::Writer, color: u8) { |
| return set_color(writer, '3' as u8, color); |
| } |
| |
| /// Set the background color |
| pub fn bg(writer: io::Writer, color: u8) { |
| return set_color(writer, '4' as u8, color); |
| } |
| |
| // Local Variables: |
| // fill-column: 78; |
| // indent-tabs-mode: nil |
| // c-basic-offset: 4 |
| // buffer-file-coding-system: utf-8-unix |
| // End: |
