Class: Plurimath::UnicodeMath::Utility

Inherits:
Plurimath::Utility
  • Object
show all
Defined in:
lib/plurimath/unicode_math/utility.rb

Overview

UnicodeMath-specific helpers extracted from Plurimath::Utility (code-quality refactor). Subclasses Utility so that bareword Utility.<generic> calls inside UnicodeMath files keep resolving here and inherit the generic helpers.

Class Method Summary collapse

Class Method Details

.accent_value(accent, lang:) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 59

def accent_value(accent, lang:)
  if accent[:accent_symbols]
    symbols_class(
      UnicodeMath::Constants::ACCENT_SYMBOLS[accent[:accent_symbols].to_sym] || accent[:accent_symbols], lang: lang
    )
  else
    accent[:first_value] || updated_primes(accent[:prime_accent_symbols])
  end
end

.base_is_prime?(base) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/plurimath/unicode_math/utility.rb', line 181

def base_is_prime?(base)
  symbol_prime?(base.parameter_two) ||
    primes_constants.key(base.parameter_two.value)
end

.base_is_sub_or_sup?(base) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/plurimath/unicode_math/utility.rb', line 191

def base_is_sub_or_sup?(base)
  case base
  when Math::Formula
    base_is_sub_or_sup?(base.value.first)
  when Math::Function::Fenced
    base_is_sub_or_sup?(base.parameter_two.first)
  when Math::Symbols::Symbol, Math::Number
    base.mini_sub_sized || base.mini_sup_sized
  end
end

.base_recursion(sub_script, sub_recursion) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 141

def base_recursion(sub_script, sub_recursion)
  base_class = Math::Function::Base
  new_sub = sub_recursion.parameter_one
  if new_sub.is_a?(base_class)
    base_recursion(sub_script, new_sub)
  else
    sub_recursion.parameter_one = base_class.new(sub_script, new_sub)
  end
  sub_recursion
end

.enclosure_attrs(mask) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 213

def enclosure_attrs(mask)
  raise "enclosure mask is not between 0 and 255" if mask.nil? || mask.negative? || mask > 255

  ret = ""
  unless mask.nil?
    mask ^= 15
    bin_mask = mask.to_s(2).reverse
    classes = bin_mask.chars.each_with_index.filter_map do |bit, i|
      Plurimath::Utility::MASK_CLASSES[2**i] if bit == "1"
    end
    ret = classes.join(" ")
  end
  ret
end

.fractions(numerator, denominator, options = nil) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 86

def fractions(numerator, denominator, options = nil)
  frac_class = Math::Function::Frac
  if denominator.is_a?(frac_class)
    if denominator.parameter_one.is_a?(frac_class)
      recursion_fraction(denominator, numerator, options)
    else
      denominator.parameter_one = frac_class.new(
        unfenced_value(numerator, paren_specific: true),
        unfenced_value(denominator.parameter_one, paren_specific: true),
        options,
      )
    end
    denominator
  else
    frac_class.new(
      unfenced_value(numerator, paren_specific: true),
      unfenced_value(denominator, paren_specific: true),
      options,
    )
  end
end

.identity_matrix(size) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 202

def identity_matrix(size)
  matrix = Array.new(size) { Array.new(size, 0) }
  size.times { |i| matrix[i][i] = 1 }
  matrix.map do |tr|
    tr.map.with_index do |td, i|
      tr[i] = Math::Function::Td.new([Math::Number.new(td.to_s)])
    end
    Math::Function::Tr.new(tr)
  end
end

.recursion_fraction(frac, numerator, options) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 108

def recursion_fraction(frac, numerator, options)
  frac_class = Math::Function::Frac
  new_numerator = frac.parameter_one
  if new_numerator.is_a?(frac_class)
    recursion_fraction(new_numerator, numerator, options)
  else
    frac.parameter_one = frac_class.new(
      unfenced_value(numerator, paren_specific: true),
      unfenced_value(frac.parameter_one, paren_specific: true),
      options,
    )
    frac
  end
end

.recursive_sub(sub_script, sub_recursion) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 123

def recursive_sub(sub_script, sub_recursion)
  base_class = Math::Function::Base
  if sub_recursion.is_a?(base_class)
    if sub_recursion.parameter_one.is_a?(base_class)
      base_recursion(sub_script, sub_recursion)
    else
      sub_recursion.parameter_one = base_class.new(sub_script,
                                                   sub_recursion.parameter_one)
    end
    sub_recursion
  else
    base_class.new(
      sub_script,
      sub_recursion,
    )
  end
end

.recursive_sup(sup_script, sup_recursion) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 152

def recursive_sup(sup_script, sup_recursion)
  power_class = Math::Function::Power
  if sup_recursion.is_a?(power_class)
    if sup_recursion.parameter_one.is_a?(power_class)
      sup_recursion(sup_script, sup_recursion)
    else
      sup_recursion.parameter_one = power_class.new(sup_script,
                                                    sup_recursion.parameter_one)
    end
    sup_recursion
  else
    power_class.new(
      sup_script,
      sup_recursion,
    )
  end
end

.sequence_slashed_values(values, lang:) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 237

def sequence_slashed_values(values, lang:)
  values.each.with_index do |value, index|
    decoded = HTMLEntities.new.decode(value.value)
    slashed = if index.zero?
                slashed_values(value.value)
              elsif decoded.match?(/[0-9]/)
                Math::Number.new(decoded)
              else
                symbols_class(
                  decoded, lang: lang
                )
              end
    values[index] = slashed
  end
  values
end

.slashed_values(value) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 228

def slashed_values(value)
  decoded = HTMLEntities.new.decode(value)
  if decoded.to_s.match?(/^\w+/)
    Math::Function::Text.new("\\#{decoded}")
  else
    Math::Symbols::Symbol.new(decoded, true)
  end
end

.sup_recursion(sup_script, sup_recursion) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 170

def sup_recursion(sup_script, sup_recursion)
  power_class = Math::Function::Power
  new_sup = sup_recursion.parameter_one
  if new_sup.is_a?(power_class)
    sup_recursion(sup_script, new_sup)
  else
    sup_recursion.parameter_one = power_class.new(sup_script, new_sup)
  end
  sup_recursion
end

.symbol_prime?(obj) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/plurimath/unicode_math/utility.rb', line 186

def symbol_prime?(obj)
  obj&.class&.const_defined?(:INPUT) &&
    primes_constants&.key(hexcode_in_input(obj))
end

.transform_accents(accents, lang:) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 25

def transform_accents(accents, lang:)
  accents.reduce do |function, accent|
    if function.is_a?(Hash)
      if function[:prime_accent_symbols]
        Math::Function::Power.new(
          unfenced_value(
            accent_value(function, lang: lang), paren_specific: true
          ),
          accent_value(accent, lang: lang),
        )
      else
        Math::Function::Overset.new(
          accent_value(accent, lang: lang),
          unfenced_value(
            accent_value(function, lang: lang), paren_specific: true
          ),
          { accent: true },
        )
      end
    elsif accent[:prime_accent_symbols]
      Math::Function::Power.new(
        unfenced_value(function, paren_specific: true),
        accent_value(accent, lang: lang),
      )
    else
      Math::Function::Overset.new(
        accent_value(accent, lang: lang),
        unfenced_value(function, paren_specific: true),
        { accent: true },
      )
    end
  end
end

.unicode_accents(accents, lang: :unicodemath) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 10

def unicode_accents(accents, lang: :unicodemath)
  if accents.is_a?(Math::Function::BinaryFunction)
    accents
  elsif accents.any? { |acc| acc&.dig(:first_value)&.is_a?(Array) }
    accent_value = accents.first[:first_value].pop
    first_value = accents.first[:first_value]
    accents.first[:first_value] = accent_value
    Math::Formula.new(
      first_value + [transform_accents(accents, lang: lang)],
    )
  else
    transform_accents(accents, lang: lang)
  end
end

.unicode_fractions(fractions) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 69

def unicode_fractions(fractions)
  frac_arr = UnicodeMath::Constants::UNICODE_FRACTIONS[fractions.to_sym]
  Math::Function::Frac.new(
    Math::Number.new(frac_arr.first.to_s),
    Math::Number.new(frac_arr.last.to_s),
    { displaystyle: false, unicodemath_fraction: true },
  )
end

.updated_primes(prime) ⇒ Object 



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# File 'lib/plurimath/unicode_math/utility.rb', line 78

def updated_primes(prime)
  filter_values(
    prime.to_s.scan(Plurimath::Utility::UNICODE_REGEX).map do |str|
      symbols_class(str, lang: :unicodemath)
    end,
  )
end