Class: TwitterCldr::Formatters::Rbnf::Rule

Inherits:
Object
  • Object
show all
Defined in:
lib/twitter_cldr/formatters/numbers/rbnf/rule.rb

Constant Summary collapse

SUBSTITUTION_TYPES = 
[:equals, :left_arrow, :right_arrow]
MASTER = 
"x.0"
IMPROPER_FRACTION = 
"x.x"
PROPER_FRACTION = 
"0.x"
NEGATIVE = 
"-x"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(base_value, rule_text, radix) ⇒ Rule

Returns a new instance of Rule.



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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 19

def initialize(base_value, rule_text, radix)
  @base_value = base_value
  @rule_text = rule_text
  @radix = radix
end

Instance Attribute Details

#base_value ⇒ Object (readonly)

Returns the value of attribute base_value.



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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 17

def base_value
  @base_value
end

#radix ⇒ Object (readonly)

Returns the value of attribute radix.



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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 17

def radix
  @radix
end

#rule_text ⇒ Object (readonly)

Returns the value of attribute rule_text.



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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 17

def rule_text
  @rule_text
end

Instance Method Details

#divisor ⇒ Object 



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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 25

def divisor
  @divisor ||= begin
    val = base_value.to_i
    exp = val > 0 ? (Math.log(val) / Math.log(radix || 10)).ceil : 1
    div = exp >= 0 ? (radix || 10) ** exp : 1

    # if result is too big, subtract one from exponent and try again
    if div > val
      (radix || 10) ** (exp - 1)
    else
      div
    end
  end
end

#even_multiple_of?(num) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 46

def even_multiple_of?(num)
  num % divisor == 0
end

#improper_fraction? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 58

def improper_fraction?
  base_value == IMPROPER_FRACTION
end

#master? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 54

def master?
  base_value == MASTER
end

#negative? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 66

def negative?
  base_vaue == NEGATIVE
end

#normal? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 50

def normal?
  !(master? || improper_fraction? || proper_fraction? || negative?)
end

#proper_fraction? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 62

def proper_fraction?
  base_value == PROPER_FRACTION
end

#substitution_count ⇒ Object 



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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 40

def substitution_count
  @substitution_count ||= tokens.inject(0) do |ret, token|
    token.is_a?(Substitution) ? ret + 1 : ret
  end
end

#tokens ⇒ Object 



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# File 'lib/twitter_cldr/formatters/numbers/rbnf/rule.rb', line 70

def tokens
  @tokens ||= inline_substitutions(
    tokenizer.tokenize(rule_text)
  )
end