Class: ActiveSupport::NumberHelper::NumberToRoundedConverter

Inherits:
NumberConverter show all
Defined in:
activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb

Overview

:nodoc:

Constant Summary

Constants inherited from NumberConverter

ActiveSupport::NumberHelper::NumberConverter::DEFAULTS

Instance Attribute Summary

Attributes inherited from NumberConverter

#number, #opts

Instance Method Summary collapse

Methods inherited from NumberConverter

convert, #execute, #initialize

Constructor Details

This class inherits a constructor from ActiveSupport::NumberHelper::NumberConverter

Instance Method Details

#convertObject


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# File 'activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb', line 7

def convert
  precision = options.delete :precision

  if precision
    case number
    when Float, String
      @number = BigDecimal(number.to_s)
    when Rational
      @number = BigDecimal(number, digit_count(number.to_i) + precision)
    else
      @number = number.to_d
    end

    if options.delete(:significant) && precision > 0
      digits, rounded_number = digits_and_rounded_number(precision)
      precision -= digits
      precision = 0 if precision < 0 # don't let it be negative
    else
      rounded_number = number.round(precision)
      rounded_number = rounded_number.to_i if precision == 0 && rounded_number.finite?
      rounded_number = rounded_number.abs if rounded_number.zero? # prevent showing negative zeros
    end

    formatted_string =
      if BigDecimal === rounded_number && rounded_number.finite?
        s = rounded_number.to_s('F')
        s << '0'.freeze * precision
        a, b = s.split('.'.freeze, 2)
        a << '.'.freeze
        a << b[0, precision]
      else
        "%00.#{precision}f" % rounded_number
      end
  else
    formatted_string = number
  end

  delimited_number = NumberToDelimitedConverter.convert(formatted_string, options)
  format_number(delimited_number)
end