diff options
Diffstat (limited to 'activesupport/lib/active_support/number_helper')
3 files changed, 72 insertions, 30 deletions
diff --git a/activesupport/lib/active_support/number_helper/number_to_human_converter.rb b/activesupport/lib/active_support/number_helper/number_to_human_converter.rb index 56185ddf4b..040343b5dd 100644 --- a/activesupport/lib/active_support/number_helper/number_to_human_converter.rb +++ b/activesupport/lib/active_support/number_helper/number_to_human_converter.rb @@ -9,6 +9,7 @@ module ActiveSupport self.validate_float = true def convert # :nodoc: + @number = RoundingHelper.new(options).round(number) @number = Float(number) # for backwards compatibility with those that didn't add strip_insignificant_zeros to their locale files @@ -20,10 +21,7 @@ module ActiveSupport exponent = calculate_exponent(units) @number = number / (10**exponent) - until (rounded_number = NumberToRoundedConverter.convert(number, options)) != NumberToRoundedConverter.convert(1000, options) - @number = number / 1000.0 - exponent += 3 - end + rounded_number = NumberToRoundedConverter.convert(number, options) unit = determine_unit(units, exponent) format.gsub("%n".freeze, rounded_number).gsub("%u".freeze, unit).strip end diff --git a/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb b/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb index 1f013990ea..c32d85a45f 100644 --- a/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb +++ b/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb @@ -5,26 +5,14 @@ module ActiveSupport self.validate_float = true def convert - precision = options.delete :precision + helper = RoundingHelper.new(options) + rounded_number = helper.round(number) - 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) + if precision = options[:precision] + if options[:significant] && precision > 0 + digits = helper.digit_count(rounded_number) 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 = @@ -38,7 +26,7 @@ module ActiveSupport "%00.#{precision}f" % rounded_number end else - formatted_string = number + formatted_string = rounded_number end delimited_number = NumberToDelimitedConverter.convert(formatted_string, options) @@ -79,14 +67,6 @@ module ActiveSupport number end end - - def absolute_number(number) - number.respond_to?(:abs) ? number.abs : number.to_d.abs - end - - def zero? - number.respond_to?(:zero?) ? number.zero? : number.to_d.zero? - end end end end diff --git a/activesupport/lib/active_support/number_helper/rounding_helper.rb b/activesupport/lib/active_support/number_helper/rounding_helper.rb new file mode 100644 index 0000000000..63b48444a6 --- /dev/null +++ b/activesupport/lib/active_support/number_helper/rounding_helper.rb @@ -0,0 +1,64 @@ +module ActiveSupport + module NumberHelper + class RoundingHelper # :nodoc: + attr_reader :options + + def initialize(options) + @options = options + end + + def round(number) + return number unless precision + number = convert_to_decimal(number) + if significant && precision > 0 + round_significant(number) + else + round_without_significant(number) + end + end + + def digit_count(number) + return 1 if number.zero? + (Math.log10(absolute_number(number)) + 1).floor + end + + private + def round_without_significant(number) + number = number.round(precision) + number = number.to_i if precision == 0 && number.finite? + number = number.abs if number.zero? # prevent showing negative zeros + number + end + + def round_significant(number) + return 0 if number.zero? + digits = digit_count(number) + multiplier = 10**(digits - precision) + (number / BigDecimal.new(multiplier.to_f.to_s)).round * multiplier + end + + def convert_to_decimal(number) + case number + when Float, String + BigDecimal(number.to_s) + when Rational + BigDecimal(number, digit_count(number.to_i) + precision) + else + number.to_d + end + end + + def precision + options[:precision] + end + + def significant + options[:significant] + end + + def absolute_number(number) + number.respond_to?(:abs) ? number.abs : number.to_d.abs + end + end + end +end |