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#! /usr/bin/env ruby
# -*- coding: UTF-8 -*-
class String
CLS="\033[0;0f\033\[2J".freeze
@color_codes = {
:black => 0, :light_black => 60,
:red => 1, :light_red => 61,
:green => 2, :light_green => 62,
:yellow => 3, :light_yellow => 63,
:blue => 4, :light_blue => 64,
:magenta => 5, :light_magenta => 65,
:cyan => 6, :light_cyan => 66,
:white => 7, :light_white => 67,
:default => 9
}
@color_codes.default=9
@color_modes = {
:default => 0, # Turn off all attributes
:bold => 1, # Set bold mode
:italic => 3, # Set italic mode
:underline => 4, # Set underline mode
:blink => 5, # Set blink mode
:swap => 7, # Exchange foreground and background colors
:hide => 8 # Hide text (foreground color would be the same as background)
}
@color_modes.default=0
@syms = [:fg, :bg, :mode]
class << self
attr_reader :color_codes, :color_modes, :syms
def create_methods
color_codes.keys.each do |cc|
next if cc == :default
define_method cc do colorize(:fg=>cc) end
define_method "on_#{cc}" do colorize(:bg=>cc) end
end
color_modes.keys.each do |cc|
next if cc == :default
define_method cc do colorize(:mode=>cc) end
end
end
end
create_methods
START="\033[".freeze
RESET="\033[0m".freeze
START_RE=/^\033\[([0-9;]+)m/
RESET_RE=/(?<!^)\033\[0m(?!$)/
def colorize h
code = h.inject([]) { |a,(k,v)| a<<resolve(k,v) if self.class.syms.include? k; a }.join(';')
return code if code.empty?
s = (
if self =~ START_RE # merge with existing escape sequence
prev = /(?<!^)\033\[#{$1}m(?!$)/
code = START + $1 + ';' + code + 'm'
self.sub(START_RE, code)
else
prev = RESET_RE
code = START + code + 'm'
code + self
end
)
s.gsub!(prev, code)
s+= RESET unless s[-4..] == RESET
s
end
private
def resolve k, v
return self.class.color_codes[v] + 30 if k == :fg
return self.class.color_codes[v] + 40 if k == :bg
return self.class.color_modes[v] if k == :mode
end
end
if $PROGRAM_NAME == __FILE__
puts "RED >> #{"blue".colorize(:fg=>:blue,:bg=>nil)} #{"green".colorize(:fg=>nil).on_green} << DER".white.on_red.underline
end
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