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Contents
require 'cli/ui'
module CLI
module UI
class Color
attr_reader :sgr, :name, :code
# Creates a new color mapping
# Signatures can be found here:
# https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
#
# ==== Attributes
#
# * +sgr+ - The color signature
# * +name+ - The name of the color
#
def initialize(sgr, name)
@sgr = sgr
@code = CLI::UI::ANSI.sgr(sgr)
@name = name
end
RED = new('31', :red)
GREEN = new('32', :green)
YELLOW = new('33', :yellow)
# default blue is low-contrast against black in some default terminal color scheme
BLUE = new('94', :blue) # 9x = high-intensity fg color x
MAGENTA = new('35', :magenta)
CYAN = new('36', :cyan)
RESET = new('0', :reset)
BOLD = new('1', :bold)
WHITE = new('97', :white)
MAP = {
red: RED,
green: GREEN,
yellow: YELLOW,
blue: BLUE,
magenta: MAGENTA,
cyan: CYAN,
reset: RESET,
bold: BOLD,
}.freeze
class InvalidColorName < ArgumentError
def initialize(name)
@name = name
end
def message
keys = Color.available.map(&:inspect).join(',')
"invalid color: #{@name.inspect} " \
"-- must be one of CLI::UI::Color.available (#{keys})"
end
end
# Looks up a color code by name
#
# ==== Raises
# Raises a InvalidColorName if the color is not available
# You likely need to add it to the +MAP+ or you made a typo
#
# ==== Returns
# Returns a color code
#
def self.lookup(name)
MAP.fetch(name)
rescue KeyError
raise InvalidColorName, name
end
# All available colors by name
#
def self.available
MAP.keys
end
end
end
end
Version data entries
14 entries across 14 versions & 2 rubygems