Module: Plurimath::Html::TransformUtility

Defined in:
lib/plurimath/html/transform_utility.rb

Constant Summary collapse

HTML_ENTITY = 
/\A&(?:#x[0-9a-f]+|#\d+|[a-z][a-z0-9]+);\z/i

Class Method Summary collapse

Class Method Details

.append_expression(value, expression) ⇒ Object 



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# File 'lib/plurimath/html/transform_utility.rb', line 14

def append_expression(value, expression)
  return [value] + expression if expression.is_a?(Array)

  [value, expression]
end

.normalize_sub_sup_value(value) ⇒ Object 



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# File 'lib/plurimath/html/transform_utility.rb', line 47

def normalize_sub_sup_value(value)
  return Utility.filter_values(value) if value.is_a?(Array)

  value
end

.normalize_symbol(symbol) ⇒ Object 



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# File 'lib/plurimath/html/transform_utility.rb', line 53

def normalize_symbol(symbol)
  symbol = symbol.to_s
  return symbol if symbol.match?(HTML_ENTITY)

  Utility.string_to_html_entity(symbol)
end

.sub_sup_value(sub_sup, sub_value: nil, sup_value: nil) ⇒ Object 



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# File 'lib/plurimath/html/transform_utility.rb', line 20

def sub_sup_value(sub_sup, sub_value: nil, sup_value: nil)
  normalized_sub_value = normalize_sub_sup_value(sub_value)
  normalized_sup_value = normalize_sub_sup_value(sup_value)

  if Utility.sub_sup_method?(sub_sup)
    sub_sup.parameter_one = normalized_sub_value if normalized_sub_value
    sub_sup.parameter_two = normalized_sup_value if normalized_sup_value
    sub_sup
  elsif normalized_sub_value && normalized_sup_value
    Math::Function::PowerBase.new(
      sub_sup,
      normalized_sub_value,
      normalized_sup_value,
    )
  elsif normalized_sup_value
    Math::Function::Power.new(
      sub_sup,
      normalized_sup_value,
    )
  else
    Math::Function::Base.new(
      sub_sup,
      normalized_sub_value,
    )
  end
end

.symbol(symbol) ⇒ Object 



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# File 'lib/plurimath/html/transform_utility.rb', line 10

def symbol(symbol)
  Utility.symbols_class(normalize_symbol(symbol), lang: :html)
end