ansi.swift

//
// ansi.swift
//

//            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
//                    Version 2, December 2004
//
// Copyright (C) 2015 Zhang Yi <zhangyi.cn@gmail.com>
//
// Everyone is permitted to copy and distribute verbatim or modified
// copies of this license document, and changing it is allowed as long
// as the name is changed.
//
//            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
//   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
//
//  0. You just DO WHAT THE FUCK YOU WANT TO.

protocol AnsiColorEscaped {
    func ansi(code: Int) -> AnsiColorEscaped
}
extension AnsiColorEscaped {
    var bold: AnsiColorEscaped { return ansi(1) }
    var underline: AnsiColorEscaped { return ansi(4) }
    var blink: AnsiColorEscaped { return ansi(5) }
    var black: AnsiColorEscaped { return ansi(30) }
    var red: AnsiColorEscaped { return ansi(31) }
    var green: AnsiColorEscaped { return ansi(32) }
    var yellow: AnsiColorEscaped { return ansi(33) }
    var blue: AnsiColorEscaped { return ansi(34) }
    var magenta: AnsiColorEscaped { return ansi(35) }
    var cyan: AnsiColorEscaped { return ansi(36) }
    var whhite: AnsiColorEscaped { return ansi(37) }
    var bgblack: AnsiColorEscaped { return ansi(40) }
    var bgred: AnsiColorEscaped { return ansi(41) }
    var bggreen: AnsiColorEscaped { return ansi(42) }
    var bgyellow: AnsiColorEscaped { return ansi(43) }
    var bgblue: AnsiColorEscaped { return ansi(44) }
    var bgmagenta: AnsiColorEscaped { return ansi(45) }
    var bgcyan: AnsiColorEscaped { return ansi(46) }
    var bgwhite: AnsiColorEscaped { return ansi(47) }
}

struct AnsiColorEscapedString: AnsiColorEscaped, CustomStringConvertible {
    private let string: String
    private let codes: Set<Int>

    func ansi(code: Int) -> AnsiColorEscaped {
        var codes = self.codes
        codes.insert(code)
        return AnsiColorEscapedString(string: string, codes: codes)
    }

    var description: String {
        return "\u{001B}[" + ";".join(codes.map { "\($0)" }) + "m" + string + "\u{001B}[0m"
    }
}

extension String: AnsiColorEscaped {
    func ansi(code: Int) -> AnsiColorEscaped {
        return AnsiColorEscapedString(string: self, codes: Set([code]))
    }
}

func +(lhs: AnsiColorEscaped, rhs: AnsiColorEscaped) -> AnsiColorEscaped {
    return "\(lhs)\(rhs)"
}

print("Hello".red.bgcyan + " " + "World".underline)

https://asciinema.org/a/dcy6zbdaletuibypz12fcdwlw