Class: Colour

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/nswtopo/helpers/colour.rb

Constant Summary collapse

Error = 
Class.new RuntimeError
COLOURS = 
YAML.load <<~YAML
  aliceblue: [240, 248, 255]
  antiquewhite: [250, 235, 215]
  aqua: [0, 255, 255]
  aquamarine: [127, 255, 212]
  azure: [240, 255, 255]
  beige: [245, 245, 220]
  bisque: [255, 228, 196]
  black: [0, 0, 0]
  blanchedalmond: [255, 235, 205]
  blue: [0, 0, 255]
  blueviolet: [138, 43, 226]
  brown: [165, 42, 42]
  burlywood: [222, 184, 135]
  cadetblue: [95, 158, 160]
  chartreuse: [127, 255, 0]
  chocolate: [210, 105, 30]
  coral: [255, 127, 80]
  cornflowerblue: [100, 149, 237]
  cornsilk: [255, 248, 220]
  crimson: [220, 20, 60]
  cyan: [0, 255, 255]
  darkblue: [0, 0, 139]
  darkcyan: [0, 139, 139]
  darkgoldenrod: [184, 134, 11]
  darkgray: [169, 169, 169]
  darkgreen: [0, 100, 0]
  darkgrey: [169, 169, 169]
  darkkhaki: [189, 183, 107]
  darkmagenta: [139, 0, 139]
  darkolivegreen: [85, 107, 47]
  darkorange: [255, 140, 0]
  darkorchid: [153, 50, 204]
  darkred: [139, 0, 0]
  darksalmon: [233, 150, 122]
  darkseagreen: [143, 188, 143]
  darkslateblue: [72, 61, 139]
  darkslategray: [47, 79, 79]
  darkslategrey: [47, 79, 79]
  darkturquoise: [0, 206, 209]
  darkviolet: [148, 0, 211]
  deeppink: [255, 20, 147]
  deepskyblue: [0, 191, 255]
  dimgray: [105, 105, 105]
  dimgrey: [105, 105, 105]
  dodgerblue: [30, 144, 255]
  firebrick: [178, 34, 34]
  floralwhite: [255, 250, 240]
  forestgreen: [34, 139, 34]
  fuchsia: [255, 0, 255]
  gainsboro: [220, 220, 220]
  ghostwhite: [248, 248, 255]
  gold: [255, 215, 0]
  goldenrod: [218, 165, 32]
  gray: [128, 128, 128]
  grey: [128, 128, 128]
  green: [0, 128, 0]
  greenyellow: [173, 255, 47]
  honeydew: [240, 255, 240]
  hotpink: [255, 105, 180]
  indianred: [205, 92, 92]
  indigo: [75, 0, 130]
  ivory: [255, 255, 240]
  khaki: [240, 230, 140]
  lavender: [230, 230, 250]
  lavenderblush: [255, 240, 245]
  lawngreen: [124, 252, 0]
  lemonchiffon: [255, 250, 205]
  lightblue: [173, 216, 230]
  lightcoral: [240, 128, 128]
  lightcyan: [224, 255, 255]
  lightgoldenrodyellow: [250, 250, 210]
  lightgray: [211, 211, 211]
  lightgreen: [144, 238, 144]
  lightgrey: [211, 211, 211]
  lightpink: [255, 182, 193]
  lightsalmon: [255, 160, 122]
  lightseagreen: [32, 178, 170]
  lightskyblue: [135, 206, 250]
  lightslategray: [119, 136, 153]
  lightslategrey: [119, 136, 153]
  lightsteelblue: [176, 196, 222]
  lightyellow: [255, 255, 224]
  lime: [0, 255, 0]
  limegreen: [50, 205, 50]
  linen: [250, 240, 230]
  magenta: [255, 0, 255]
  maroon: [128, 0, 0]
  mediumaquamarine: [102, 205, 170]
  mediumblue: [0, 0, 205]
  mediumorchid: [186, 85, 211]
  mediumpurple: [147, 112, 219]
  mediumseagreen: [60, 179, 113]
  mediumslateblue: [123, 104, 238]
  mediumspringgreen: [0, 250, 154]
  mediumturquoise: [72, 209, 204]
  mediumvioletred: [199, 21, 133]
  midnightblue: [25, 25, 112]
  mintcream: [245, 255, 250]
  mistyrose: [255, 228, 225]
  moccasin: [255, 228, 181]
  navajowhite: [255, 222, 173]
  navy: [0, 0, 128]
  oldlace: [253, 245, 230]
  olive: [128, 128, 0]
  olivedrab: [107, 142, 35]
  orange: [255, 165, 0]
  orangered: [255, 69, 0]
  orchid: [218, 112, 214]
  palegoldenrod: [238, 232, 170]
  palegreen: [152, 251, 152]
  paleturquoise: [175, 238, 238]
  palevioletred: [219, 112, 147]
  papayawhip: [255, 239, 213]
  peachpuff: [255, 218, 185]
  peru: [205, 133, 63]
  pink: [255, 192, 203]
  plum: [221, 160, 221]
  powderblue: [176, 224, 230]
  purple: [128, 0, 128]
  red: [255, 0, 0]
  rosybrown: [188, 143, 143]
  royalblue: [65, 105, 225]
  saddlebrown: [139, 69, 19]
  salmon: [250, 128, 114]
  sandybrown: [244, 164, 96]
  seagreen: [46, 139, 87]
  seashell: [255, 245, 238]
  sienna: [160, 82, 45]
  silver: [192, 192, 192]
  skyblue: [135, 206, 235]
  slateblue: [106, 90, 205]
  slategray: [112, 128, 144]
  slategrey: [112, 128, 144]
  snow: [255, 250, 250]
  springgreen: [0, 255, 127]
  steelblue: [70, 130, 180]
  tan: [210, 180, 140]
  teal: [0, 128, 128]
  thistle: [216, 191, 216]
  tomato: [255, 99, 71]
  turquoise: [64, 224, 208]
  violet: [238, 130, 238]
  wheat: [245, 222, 179]
  white: [255, 255, 255]
  whitesmoke: [245, 245, 245]
  yellow: [255, 255, 0]
  yellowgreen: [154, 205, 50]
YAML

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(value) ⇒ Colour

Returns a new instance of Colour.

Raises:



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# File 'lib/nswtopo/helpers/colour.rb', line 154

def initialize(value)
  @string = value
  @triplet = case value
  when Colour
    @string = value.string.dup
    value.triplet.dup
  when Array
    value.take(3).map(&:round)
  when *COLOURS.keys
    COLOURS[value]
  when /^#?([0-9A-F]{2})([0-9A-F]{2})([0-9A-F]{2})$/i
    [$1, $2, $3].map { |hex| Integer("0x#{hex}") }
  when /^rgb\((\d{1,3}), *(\d{1,3}), *(\d{1,3})\)$/
    [$1, $2, $3].map(&:to_i)
  when /^hsl\((\d{1,3}), *(\d{1,3})%, *(\d{1,3})%\)$/
    h, s, l = [$1, $2, $3].map(&:to_i)
    h %= 360;
    c = (100 - (2 * l - 100).abs) * s / 10000.0
    x = (60 - (h % 120 - 60).abs) * c / 60.0
    m = (l - 50 * c) / 100.0
    r, g, b = case
    when s == 0  then [0, 0, 0]
    when h <  60 then [c, x, 0]
    when h < 120 then [x, c, 0]
    when h < 180 then [0, c, x]
    when h < 240 then [0, x, c]
    when h < 300 then [x, 0, c]
    when h < 360 then [c, 0, x]
    end.map do |v|
      255 * (v + m)
    end.map(&:to_i)
  end
  raise Error, "invalid colour: #{value}" unless @triplet&.all?(0..255)
  @string = "rgb(%i,%i,%i)" % @triplet unless String === @string
  @string.tr! ?\s, ""
end

Instance Attribute Details

#string ⇒ Object (readonly) Also known as: to_s

Returns the value of attribute string.



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# File 'lib/nswtopo/helpers/colour.rb', line 191

def string
  @string
end

#triplet ⇒ Object (readonly)

Returns the value of attribute triplet.



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# File 'lib/nswtopo/helpers/colour.rb', line 191

def triplet
  @triplet
end