class Coupdoeil::Hovercard::Option::Offset

def parse(value)
  float_value = value.to_f
  return 0 if float_value.zero?
  base = 0
  base |= 1 if float_value.negative?
  base |= 2 if value.is_a?(String) && value.end_with?("rem")
  integer, decimals = float_value.abs.to_s.split(".")
  base |= (decimals.to_i << 2)
  base |= (integer.to_i << 2 + 11)
  base
end

def validate!
  return if value in Float | Integer
  return if value.to_s.match?(/^-?\d+(\.\d{1,3})?(px|rem)?$/)
  raise_invalid_option "Value should be a signed float or integer, followed or not by 'rem' or 'px'."
end