Class: Rainbow::Color

Inherits:
Object
  • Object
show all
Defined in:
lib/rainbow/color.rb

Direct Known Subclasses

Indexed

Defined Under Namespace

Classes: Indexed, Named, RGB, X11Named

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Attribute Details

#ground ⇒ Object (readonly)

Returns the value of attribute ground.



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# File 'lib/rainbow/color.rb', line 4

def ground
  @ground
end

Class Method Details

.build(ground, values) ⇒ Object 



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# File 'lib/rainbow/color.rb', line 6

def self.build(ground, values)
  unless [1, 3].include?(values.size)
    fail ArgumentError,
      "Wrong number of arguments for color definition, should be 1 or 3"
  end

  color = values.size == 1 ? values.first : values

  case color
  when Integer
    Indexed.new(ground, color)
  when Symbol
    if Named.color_names.include?(color)
      Named.new(ground, color)
    elsif X11Named.color_names.include?(color)
      X11Named.new(ground, color)
    else
      fail ArgumentError,
        "Unknown color name, valid names: " +
        (Named.color_names + X11Named.color_names).join(', ')
    end
  when Array
    RGB.new(ground, *color)
  when String
    RGB.new(ground, *parse_hex_color(color))
  end
end

.parse_hex_color(hex) ⇒ Object 



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# File 'lib/rainbow/color.rb', line 34

def self.parse_hex_color(hex)
  hex = hex.sub(/^#/, '')
  r   = hex[0..1].to_i(16)
  g   = hex[2..3].to_i(16)
  b   = hex[4..5].to_i(16)

  [r, g, b]
end