def initialize(attrs, representation = nil, allow_both_rgb_and_hsl = false)
super(nil)
if attrs.is_a?(Array)
unless (3..4).include?(attrs.size)
raise ArgumentError.new("Color.new(array) expects a three- or four-element array")
end
red, green, blue = attrs[0...3].map {|c| Sass::Util.round(c)}
@attrs = {:red => red, :green => green, :blue => blue}
@attrs[:alpha] = attrs[3] ? attrs[3].to_f : 1
@representation = representation
else
attrs = attrs.reject {|_k, v| v.nil?}
hsl = [:hue, :saturation, :lightness] & attrs.keys
rgb = [:red, :green, :blue] & attrs.keys
if !allow_both_rgb_and_hsl && !hsl.empty? && !rgb.empty?
raise ArgumentError.new("Color.new(hash) may not have both HSL and RGB keys specified")
elsif hsl.empty? && rgb.empty?
raise ArgumentError.new("Color.new(hash) must have either HSL or RGB keys specified")
elsif !hsl.empty? && hsl.size != 3
raise ArgumentError.new("Color.new(hash) must have all three HSL values specified")
elsif !rgb.empty? && rgb.size != 3
raise ArgumentError.new("Color.new(hash) must have all three RGB values specified")
end
@attrs = attrs
@attrs[:hue] %= 360 if @attrs[:hue]
@attrs[:alpha] ||= 1
@representation = @attrs.delete(:representation)
end
[:red, :green, :blue].each do |k|
next if @attrs[k].nil?
@attrs[k] = Sass::Util.restrict(Sass::Util.round(@attrs[k]), 0..255)
end
[:saturation, :lightness].each do |k|
next if @attrs[k].nil?
@attrs[k] = Sass::Util.restrict(@attrs[k], 0..100)
end
@attrs[:alpha] = Sass::Util.restrict(@attrs[:alpha], 0..1)
end