Module: Sass::Script::Functions

Defined in:
lib/rhet-butler/sass-functions.rb

Instance Method Summary collapse

Instance Method Details

#exp(modulus, exponent) ⇒ Object 



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# File 'lib/rhet-butler/sass-functions.rb', line 6

def exp(modulus, exponent)
  assert_type modulus, :Number
  assert_type exponent, :Number

  Number.new(modulus.value ** exponent.value, modulus.numerator_units, modulus.denominator_units)
end

#tween(initial, final, ratio) ⇒ Object 



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# File 'lib/rhet-butler/sass-functions.rb', line 14

def tween(initial, final, ratio)
  assert_type initial, :Number
  assert_type final, :Number
  assert_type ratio, :Number

  initial_units = [initial.numerator_units, initial.denominator_units]
  final_units = [final.numerator_units, final.denominator_units]
  unless initial_units == final_units
    raise ArgumentError, "Mismatched units: initial: #{initial_units.inspect} != final: #{final_units.inspect}"
  end

  ratio_units = ratio.numerator_units - ratio.denominator_units
  ratio_value = case ratio_units
                when %w{%}
                  ratio.value / 100.0
                when []
                  ratio.value
                else
                  raise ArgumentError, "Bad units for ratio: #{ratio_units.inspect}"
                end

  Number.new(initial.value + ((final.value - initial.value) * ratio_value), *initial_units)
end