78 lines
1.7 KiB
Ruby
78 lines
1.7 KiB
Ruby
require 'sass/constant/literal'
|
|
|
|
module Sass::Constant # :nodoc:
|
|
class Color < Literal # :nodoc:
|
|
|
|
REGEXP = /\##{"([0-9a-fA-F]{1,2})" * 3}/
|
|
|
|
def parse(value)
|
|
@value = value.scan(REGEXP)[0].map { |num| num.ljust(2, 'f').to_i(16) }
|
|
end
|
|
|
|
def plus(other)
|
|
if other.is_a? Sass::Constant::String
|
|
Sass::Constant::String.from_value(self.to_s + other.to_s)
|
|
else
|
|
piecewise(other, :+)
|
|
end
|
|
end
|
|
|
|
def minus(other)
|
|
if other.is_a? Sass::Constant::String
|
|
raise NoMethodError.new(nil, :minus)
|
|
else
|
|
piecewise(other, :-)
|
|
end
|
|
end
|
|
|
|
def times(other)
|
|
if other.is_a? Sass::Constant::String
|
|
raise NoMethodError.new(nil, :times)
|
|
else
|
|
piecewise(other, :*)
|
|
end
|
|
end
|
|
|
|
def div(other)
|
|
if other.is_a? Sass::Constant::String
|
|
raise NoMethodError.new(nil, :div)
|
|
else
|
|
piecewise(other, :/)
|
|
end
|
|
end
|
|
|
|
def mod(other)
|
|
if other.is_a? Sass::Constant::String
|
|
raise NoMethodError.new(nil, :mod)
|
|
else
|
|
piecewise(other, :%)
|
|
end
|
|
end
|
|
|
|
def to_s
|
|
red, green, blue = @value.map { |num| num.to_s(16).rjust(2, '0') }
|
|
"##{red}#{green}#{blue}"
|
|
end
|
|
|
|
protected
|
|
|
|
def self.filter_value(value)
|
|
value.map { |num| num.to_i }
|
|
end
|
|
|
|
private
|
|
|
|
def piecewise(other, operation)
|
|
other_num = other.is_a? Number
|
|
other_val = other.value
|
|
|
|
rgb = []
|
|
for i in (0...3)
|
|
res = @value[i].send(operation, other_num ? other_val : other_val[i])
|
|
rgb[i] = [ [res, 255].min, 0 ].max
|
|
end
|
|
Color.from_value(rgb)
|
|
end
|
|
end
|
|
end
|