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# frozen_string_literal: true
module Gitlab
class Color
PATTERN = /\A\#(?:[0-9A-Fa-f]{3}){1,2}\Z/.freeze
def initialize(value)
@value = value&.strip&.freeze
end
module Constants
DARK = Color.new('#333333')
LIGHT = Color.new('#FFFFFF')
COLOR_NAME_TO_HEX = {
black: '#000000',
silver: '#C0C0C0',
gray: '#808080',
white: '#FFFFFF',
maroon: '#800000',
red: '#FF0000',
purple: '#800080',
fuchsia: '#FF00FF',
green: '#008000',
lime: '#00FF00',
olive: '#808000',
yellow: '#FFFF00',
navy: '#000080',
blue: '#0000FF',
teal: '#008080',
aqua: '#00FFFF',
orange: '#FFA500',
aliceblue: '#F0F8FF',
antiquewhite: '#FAEBD7',
aquamarine: '#7FFFD4',
azure: '#F0FFFF',
beige: '#F5F5DC',
bisque: '#FFE4C4',
blanchedalmond: '#FFEBCD',
blueviolet: '#8A2BE2',
brown: '#A52A2A',
burlywood: '#DEB887',
cadetblue: '#5F9EA0',
chartreuse: '#7FFF00',
chocolate: '#D2691E',
coral: '#FF7F50',
cornflowerblue: '#6495ED',
cornsilk: '#FFF8DC',
crimson: '#DC143C',
darkblue: '#00008B',
darkcyan: '#008B8B',
darkgoldenrod: '#B8860B',
darkgray: '#A9A9A9',
darkgreen: '#006400',
darkgrey: '#A9A9A9',
darkkhaki: '#BDB76B',
darkmagenta: '#8B008B',
darkolivegreen: '#556B2F',
darkorange: '#FF8C00',
darkorchid: '#9932CC',
darkred: '#8B0000',
darksalmon: '#E9967A',
darkseagreen: '#8FBC8F',
darkslateblue: '#483D8B',
darkslategray: '#2F4F4F',
darkslategrey: '#2F4F4F',
darkturquoise: '#00CED1',
darkviolet: '#9400D3',
deeppink: '#FF1493',
deepskyblue: '#00BFFF',
dimgray: '#696969',
dimgrey: '#696969',
dodgerblue: '#1E90FF',
firebrick: '#B22222',
floralwhite: '#FFFAF0',
forestgreen: '#228B22',
gainsboro: '#DCDCDC',
ghostwhite: '#F8F8FF',
gold: '#FFD700',
goldenrod: '#DAA520',
greenyellow: '#ADFF2F',
grey: '#808080',
honeydew: '#F0FFF0',
hotpink: '#FF69B4',
indianred: '#CD5C5C',
indigo: '#4B0082',
ivory: '#FFFFF0',
khaki: '#F0E68C',
lavender: '#E6E6FA',
lavenderblush: '#FFF0F5',
lawngreen: '#7CFC00',
lemonchiffon: '#FFFACD',
lightblue: '#ADD8E6',
lightcoral: '#F08080',
lightcyan: '#E0FFFF',
lightgoldenrodyellow: '#FAFAD2',
lightgray: '#D3D3D3',
lightgreen: '#90EE90',
lightgrey: '#D3D3D3',
lightpink: '#FFB6C1',
lightsalmon: '#FFA07A',
lightseagreen: '#20B2AA',
lightskyblue: '#87CEFA',
lightslategray: '#778899',
lightslategrey: '#778899',
lightsteelblue: '#B0C4DE',
lightyellow: '#FFFFE0',
limegreen: '#32CD32',
linen: '#FAF0E6',
mediumaquamarine: '#66CDAA',
mediumblue: '#0000CD',
mediumorchid: '#BA55D3',
mediumpurple: '#9370DB',
mediumseagreen: '#3CB371',
mediumslateblue: '#7B68EE',
mediumspringgreen: '#00FA9A',
mediumturquoise: '#48D1CC',
mediumvioletred: '#C71585',
midnightblue: '#191970',
mintcream: '#F5FFFA',
mistyrose: '#FFE4E1',
moccasin: '#FFE4B5',
navajowhite: '#FFDEAD',
oldlace: '#FDF5E6',
olivedrab: '#6B8E23',
orangered: '#FF4500',
orchid: '#DA70D6',
palegoldenrod: '#EEE8AA',
palegreen: '#98FB98',
paleturquoise: '#AFEEEE',
palevioletred: '#DB7093',
papayawhip: '#FFEFD5',
peachpuff: '#FFDAB9',
peru: '#CD853F',
pink: '#FFC0CB',
plum: '#DDA0DD',
powderblue: '#B0E0E6',
rosybrown: '#BC8F8F',
royalblue: '#4169E1',
saddlebrown: '#8B4513',
salmon: '#FA8072',
sandybrown: '#F4A460',
seagreen: '#2E8B57',
seashell: '#FFF5EE',
sienna: '#A0522D',
skyblue: '#87CEEB',
slateblue: '#6A5ACD',
slategray: '#708090',
slategrey: '#708090',
snow: '#FFFAFA',
springgreen: '#00FF7F',
steelblue: '#4682B4',
tan: '#D2B48C',
thistle: '#D8BFD8',
tomato: '#FF6347',
turquoise: '#40E0D0',
violet: '#EE82EE',
wheat: '#F5DEB3',
whitesmoke: '#F5F5F5',
yellowgreen: '#9ACD32',
rebeccapurple: '#663399'
}.stringify_keys.transform_values { Color.new(_1) }.freeze
end
def self.of(color)
raise ArgumentError, 'No color spec' unless color
return color if color.is_a?(self)
color = color.to_s.strip
Constants::COLOR_NAME_TO_HEX[color.downcase] || new(color)
end
# Generate a hex color based on hex-encoded value
def self.color_for(value)
Color.new("##{Digest::SHA256.hexdigest(value.to_s)[0..5]}")
end
def to_s
@value.to_s
end
def as_json(_options = nil)
to_s
end
def eql(other)
return false unless other.is_a?(self.class)
to_s == other.to_s
end
alias_method :==, :eql
def valid?
PATTERN.match?(@value)
end
def light?
valid? && rgb.sum > 500
end
def luminosity
return :light if light?
:dark
end
def contrast
return Constants::DARK if light?
Constants::LIGHT
end
private
def rgb
return [] unless valid?
@rgb ||= if @value.length == 4
@value[1, 4].scan(/./).map { |v| (v * 2).hex }
else
@value[1, 7].scan(/.{2}/).map(&:hex)
end
end
end
end
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