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|
module Colorize
module InstanceMethods
#
# Change color of string
#
# Examples:
#
# puts "This is blue".colorize(:blue)
# puts "This is light blue".colorize(:light_blue)
# puts "This is also blue".colorize(:color => :blue)
# puts "This is light blue with red background".colorize(:color => :light_blue, :background => :red)
# puts "This is light blue with red background".colorize(:light_blue ).colorize( :background => :red)
# puts "This is blue text on red".blue.on_red
# puts "This is red on blue".colorize(:red).on_blue
# puts "This is red on blue and underline".colorize(:red).on_blue.underline
# puts "This is blue text on red".blue.on_red.blink
# puts "This is uncolorized".blue.on_red.uncolorize
#
def colorize(params)
return self if self.class.disable_colorization
require_windows_libs
scan_for_colors.inject(self.class.new) do |str, match|
colors_from_params(match, params)
defaults_colors(match)
str << "\033[#{match[0]};#{match[1]};#{match[2]}m#{match[3]}\033[0m"
end
end
#
# Return uncolorized string
#
def uncolorize
scan_for_colors.inject(self.class.new) do |str, match|
str << match[3]
end
end
#
# Return true if string is colorized
#
def colorized?
scan_for_colors.inject([]) do |colors, match|
colors << match.tap(&:pop)
end.flatten.compact.any?
end
private
#
# Set default colors
#
def defaults_colors(match)
match[0] ||= mode(:default)
match[1] ||= color(:default)
match[2] ||= background_color(:default)
end
#
# Set color from params
#
def colors_from_params(match, params)
case params
when Hash then colors_from_hash(match, params)
when Symbol then color_from_symbol(match, params)
end
end
#
# Set colors from params hash
#
def colors_from_hash(match, hash)
match[0] = mode(hash[:mode]) if mode(hash[:mode])
match[1] = color(hash[:color]) if color(hash[:color])
match[2] = background_color(hash[:background]) if background_color(hash[:background])
end
#
# Set color from params symbol
#
def color_from_symbol(match, symbol)
match[1] = color(symbol) if color(symbol)
end
#
# Color for foreground (offset 30)
#
def color(color)
self.class.color_codes[color] + 30 if self.class.color_codes[color]
end
#
# Color for background (offset 40)
#
def background_color(color)
self.class.color_codes[color] + 40 if self.class.color_codes[color]
end
#
# Mode
#
def mode(mode)
self.class.mode_codes[mode]
end
#
# Scan for colorized string
#
def scan_for_colors
scan(/\033\[([0-9;]+)m(.+?)\033\[0m|([^\033]+)/m).map do |match|
split_colors(match)
end
end
def split_colors(match)
colors = (match[0] || '').split(';')
array = Array.new(3)
array[0], array[1], array[2] = colors if colors.length == 3
array[1] = colors if colors.length == 1
array[3] = match[1] || match[2]
array
end
#
# Require windows libs
#
def require_windows_libs
require 'Win32/Console/ANSI' if RUBY_VERSION < '2.0.0' && RUBY_PLATFORM =~ /win32/
rescue LoadError
raise 'You must gem install win32console to use colorize on Windows'
end
end
end
|
