Class: Plurimath::Utility

Inherits:
Object
  • Object
show all
Defined in:
lib/plurimath/utility.rb,
lib/plurimath/utility/intent_encoding.rb

Direct Known Subclasses

IntentEncoding

Defined Under Namespace

Classes: IntentEncoding

Constant Summary collapse

UNICODE_REGEX = 
%r{&#x[a-zA-Z0-9]+;}
FONT_STYLES = 
{
  "double-struck": Math::Function::FontStyle::DoubleStruck,
  "sans-serif-bold-italic": Math::Function::FontStyle::SansSerifBoldItalic,
  "sans-serif-italic": Math::Function::FontStyle::SansSerifItalic,
  "bold-sans-serif": Math::Function::FontStyle::BoldSansSerif,
  "sans-serif": Math::Function::FontStyle::SansSerif,
  "bold-fraktur": Math::Function::FontStyle::BoldFraktur,
  "bold-italic": Math::Function::FontStyle::BoldItalic,
  "bold-script": Math::Function::FontStyle::BoldScript,
  mbfitsans: Math::Function::FontStyle::SansSerifBoldItalic,
  monospace: Math::Function::FontStyle::Monospace,
  mathfrak: Math::Function::FontStyle::Fraktur,
  mitsans: Math::Function::FontStyle::SansSerifItalic,
  mbfsans: Math::Function::FontStyle::BoldSansSerif,
  mbffrak: Math::Function::FontStyle::BoldFraktur,
  mathcal: Math::Function::FontStyle::Script,
  fraktur: Math::Function::FontStyle::Fraktur,
  mbfscr: Math::Function::FontStyle::BoldScript,
  mathbb: Math::Function::FontStyle::DoubleStruck,
  double: Math::Function::FontStyle::DoubleStruck,
  mathtt: Math::Function::FontStyle::Monospace,
  mathsf: Math::Function::FontStyle::SansSerif,
  mathrm: Math::Function::FontStyle::Normal,
  textrm: Math::Function::FontStyle::Normal,
  italic: Math::Function::FontStyle::Italic,
  mathit: Math::Function::FontStyle::Italic,
  textit: Math::Function::FontStyle::Italic,
  mathbf: Math::Function::FontStyle::Bold,
  textbf: Math::Function::FontStyle::Bold,
  script: Math::Function::FontStyle::Script,
  normal: Math::Function::FontStyle::Normal,
  mbfit: Math::Function::FontStyle::BoldItalic,
  msans: Math::Function::FontStyle::SansSerif,
  mfrak: Math::Function::FontStyle::Fraktur,
  mscr: Math::Function::FontStyle::Script,
  bold: Math::Function::FontStyle::Bold,
  bbb: Math::Function::FontStyle::DoubleStruck,
  Bbb: Math::Function::FontStyle::DoubleStruck,
  mtt: Math::Function::FontStyle::Monospace,
  cal: Math::Function::FontStyle::Script,
  mit: Math::Function::FontStyle::Italic,
  mup: Math::Function::FontStyle::Normal,
  mbf: Math::Function::FontStyle::Bold,
  sf: Math::Function::FontStyle::SansSerif,
  tt: Math::Function::FontStyle::Monospace,
  fr: Math::Function::FontStyle::Fraktur,
  rm: Math::Function::FontStyle::Normal,
  cc: Math::Function::FontStyle::Script,
  ii: Math::Function::FontStyle::Italic,
  bb: Math::Function::FontStyle::Bold,
  bf: Math::Function::FontStyle::Bold,
}.freeze
ALIGNMENT_LETTERS = 
{
  c: "center",
  r: "right",
  l: "left",
}.freeze
UNARY_CLASSES = 
%w[
  arccos
  arcsin
  arctan
  liminf
  limsup
  right
  sech
  sinh
  tanh
  cosh
  coth
  csch
  left
  max
  min
  sec
  sin
  sup
  deg
  det
  dim
  exp
  gcd
  glb
  lub
  lcm
  ker
  tan
  cos
  cot
  csc
  ln
  lg
].freeze
MUNDER_CLASSES = 
%w[
  ubrace
  obrace
  right
  max
  min
].freeze
PARENTHESIS = 
{
  "〈": "〉",
  "⌊": "⌋",
  "⌈": "⌉",
  "‖": "‖",
  "{": "}",
  "[": "]",
  "|": "|",
  "(": ")",
  "{": "}",
  "[": "]",
}.freeze
TEXT_CLASSES = 
%w[
  symbol
  number
  text
].freeze
TABLE_SUPPORTED_ATTRS = 
%i[
  columnlines
  rowlines
  frame
].freeze
MPADDED_ATTRS = 
%i[
  height
  depth
  width
].freeze
MGLYPH_ATTRS = 
%i[
  height
  width
  index
  alt
  src
].freeze
UNICODEMATH_MENCLOSE_FUNCTIONS = 
{
  underline: "bottom",
  underbar: "bottom",
  longdiv: "longdiv",
  xcancel: "updiagonalstrike downdiagonalstrike",
  bcancel: "updiagonalstrike",
  ellipse: "circle",
  circle: "circle",
  cancel: "downdiagonalstrike",
  rrect: "roundedbox",
  rect: "box",
}.freeze
MASK_CLASSES = 
{
  1 => "top",
  2 => "bottom",
  4 => "left",
  8 => "right",
  16 => "horizontalstrike",
  32 => "verticalstrike",
  64 => "downdiagonalstrike",
  128 => "updiagonalstrike",
}.freeze
HTML_ENTITIES = 
HTMLEntities.new

Class Method Summary collapse

Class Method Details

.accent_value(accent, lang:, function: false) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 894

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

.all_symbols_classes(lang) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 307

def all_symbols_classes(lang)
  symbols_hash(lang).merge(parens_hash(lang))
end

.asciimath_symbol_object(value, lang: :asciimath) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 648

def asciimath_symbol_object(value, lang: :asciimath)
  return if value.nil?

  symbols = symbols_hash(lang)
  return symbols[value&.to_s].new if symbols.key?(value&.to_s)

  symbol_object(value&.to_s, lang: lang)
end

.attr_is_accent(attrs, value) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 551

def attr_is_accent(attrs, value)
  if value.last.is_a?(Math::Function::UnaryFunction)
    value.last.parameter_one = value.shift if value.length > 1
    value.last.attributes = attrs.transform_values do |v|
      YAML.safe_load(v)
    end
  end
  value
end

.attr_is_function(attrs, value) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 561

def attr_is_function(attrs, value)
  case attrs
  when Math::Function::Fenced
    attrs.parameter_two = value.compact
    attrs
  when Math::Function::FontStyle
    attrs.parameter_one = filter_values(value)
    attrs
  when Math::Function::Color
    color_value = filter_values(value)
    if attrs.parameter_two
      attrs.parameter_two.parameter_one = color_value
    else
      attrs.parameter_two = color_value
    end
    attrs
  end
end

.base_is_prime?(base) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/plurimath/utility.rb', line 1016

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/utility.rb', line 1039

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/utility.rb', line 976

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

.binary_function_classes(mrow, lang:, under: false) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 696

def binary_function_classes(mrow, lang:, under: false)
  binary_class = Math::Function::BinaryFunction
  mrow.each_with_index do |object, ind|
    if object.is_a?(String)
      mrow[ind] =
        mathml_unary_classes([object], lang: lang)
    end
    object = mrow[ind]
    next unless object.is_a?(binary_class)

    if object.is_a?(Math::Function::Mod)
      next unless mrow.length >= 1

      object.parameter_one = mrow.delete_at(ind - 1) unless ind.zero?
      object.parameter_two = mrow.delete_at(ind)
    elsif Mathml::Constants::UNICODE_SYMBOLS.invert[object.class_name] && mrow.length > 1
      next if object.parameter_one || mrow.length > 2
      next object.parameter_one = mrow.delete_at(ind - 1) if under && ind <= 1

      object.parameter_one = mrow.delete_at(ind + 1)
    end
  end
end

.capitalize(text) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 262

def capitalize(text)
  text.to_s.split("_").map(&:capitalize).join
end

.enclosure_attrs(mask) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 1061

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|
      MASK_CLASSES[2**i] if bit == "1"
    end
    ret = classes.join(" ")
  end
  ret
end

.fenceable_classes(mrow = []) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 761

def fenceable_classes(mrow = [])
  return false unless mrow.length > 1
  return unless paren_able?(PARENTHESIS,
                            mrow) || (mrow.first.is_a?(Math::Symbols::Paren) && mrow.last.is_a?(Math::Symbols::Paren))

  open_paren = mrow.shift
  close_paren = mrow.pop
  if mrow.length == 1 && mrow.first.is_a?(Math::Function::Table)
    table = mrow.first
    table.open_paren = open_paren
    table.close_paren = close_paren
  else
    mrow.replace(
      [
        Math::Function::Fenced.new(open_paren, mrow.dup, close_paren),
      ],
    )
  end
end

.filter_math_zone_values(value, lang:, intent: false, options: nil) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 794

def filter_math_zone_values(value, lang:, intent: false, options: nil)
  return [] if value&.empty?

  new_arr = []
  temp_array = []
  skip_index = nil
  value.each_with_index do |obj, index|
    object = obj.dup
    next if index == skip_index
    if TEXT_CLASSES.include?(object.class_name) || math_display_text_objects(object)
      next temp_array << (if object.is_a?(Math::Symbols::Symbol)
                            symbol_to_text(
                              object, lang: lang, intent: intent, options: options
                            )
                          else
                            object.value
                          end)
    end

    if temp_array.any?
      new_arr << Math::Function::Text.new(temp_array.join(" "),
                                          lang: lang)
    end
    temp_array = []
    new_arr << object
  end
  if temp_array.any?
    new_arr << Math::Function::Text.new(temp_array.join(" "),
                                        lang: lang)
  end
  new_arr
end

.filter_table_data(table_data) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 227

def filter_table_data(table_data)
  table_data.each_with_index do |object, ind|
    if object.is_a?(Math::Symbols::Minus)
      table_data[ind] = Math::Formula.new(
        [object, table_data.delete_at(ind.next)],
      )
    end
  end
  table_data
end

.filter_values(array, new_formula: true) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 348

def filter_values(array, new_formula: true)
  return array unless array.is_a?(Array) || array.is_a?(Math::Formula)

  array = array.is_a?(Math::Formula) ? array.value : array.flatten.compact
  return Math::Formula.new(array) if array.length > 1 && new_formula
  return array if array.length > 1 && !new_formula

  array.first
end

.find_pos_chr(fonts_array, key) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 393

def find_pos_chr(fonts_array, key)
  fonts_array.find { |d| d.is_a?(Hash) && d[key] }
end

.frac_values(object) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 618

def frac_values(object)
  case object
  when Math::Formula
    object.value.any? { |d| symbol_value(d, ",") }
  when Array
    object.any? { |d| symbol_value(d, ",") }
  end
end

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



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# File 'lib/plurimath/utility.rb', line 921

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

.get_class(text) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 248

def get_class(text)
  Object.const_get("Plurimath::Math::Function::#{capitalize(text)}")
end

.get_paren_class(text) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 258

def get_paren_class(text)
  Object.const_get("Plurimath::Math::Symbols::Paren::#{capitalize(text)}")
end

.get_symbol_class(text) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 252

def get_symbol_class(text)
  Object.const_get("Plurimath::Math::Symbols::#{capitalize(text)}")
rescue StandardError
  get_paren_class(text)
end

.get_table_class(text) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 238

def get_table_class(text)
  Object.const_get("Plurimath::Math::Function::Table::#{capitalize(text)}")
end

.hexcode_in_input(field) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 1033

def hexcode_in_input(field)
  field.input(:unicodemath)&.flatten&.find do |input|
    input.match?(/&#x.+;/)
  end
end

.html_entity_to_unicode(string) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 467

def html_entity_to_unicode(string)
  return string unless string&.include?("&")

  HTML_ENTITIES.decode(string)
end

.identity_matrix(size) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 1050

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

.join_attr_value(attrs, value, unicode_only: false, lang: :mathml) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 493

def join_attr_value(attrs, value, unicode_only: false, lang: :mathml)
  if attrs.is_a?(Hash) && attrs.key?(:intent)
    [
      Math::Function::Intent.new(
        filter_values(join_attr_value(nil, value,
                                      unicode_only: unicode_only, lang: lang)),
        Math::Function::Text.new(attrs[:intent], lang: lang),
      ),
    ]
  elsif value.any?(String)
    new_value = mathml_unary_classes(value, unicode_only: unicode_only,
                                            lang: lang)
    array_value = Array(new_value)
    if attrs.nil?
      array_value
    else
      join_attr_value(attrs, array_value,
                      unicode_only: unicode_only)
    end
  elsif attrs.nil?
    value
  elsif attrs.is_a?(String) && ["solid",
                                "none"].include?(attrs.split.first.downcase)
    table_separator(attrs.split, value)
  elsif attrs.is_a?(Hash)
    if attrs.key?(:accent) || attrs.key?(:accentunder)
      attr_is_accent(attrs, value)
    elsif attrs.key?(:linebreak)
      Math::Function::Linebreak.new(value.first, attrs)
    elsif attrs.key?(:bevelled) || attrs.key?(:linethickness)
      Math::Function::Frac.new(value[0], value[1], attrs)
    elsif attrs.key?(:notation)
      value << attrs
    elsif attrs.key?(:separators)
      fenced = Math::Function::Fenced.new(
        symbol_object(attrs[:open] || "(", lang: lang),
        value,
        symbol_object(attrs[:close] || ")", lang: lang),
      )
      fenced.options = { separators: attrs[:separators] }
      fenced
    elsif TABLE_SUPPORTED_ATTRS.any? { |atr| attrs.key?(atr) }
      Math::Function::Table.new(value, nil, nil, attrs)
    elsif MPADDED_ATTRS.any? { |atr| attrs.key?(atr) }
      Math::Function::Mpadded.new(
        filter_values(value),
        attrs,
      )
    elsif MGLYPH_ATTRS.any? { |atr| attrs.key?(atr) }
      Math::Function::Mglyph.new(
        attrs,
      )
    end
  elsif attrs.is_a?(Math::Core)
    attr_is_function(attrs, value)
  end
end

.latex_table_curly_paren(string) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 1114

def latex_table_curly_paren(string)
  case string
  when "{" then Math::Symbols::Paren::Lcurly.new
  when "}" then Math::Symbols::Paren::Rcurly.new
  else symbols_class(string, lang: :latex)
  end
end

.left_right_objects(paren, function) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 665

def left_right_objects(paren, function)
  paren = if paren.to_s.match?(/\\\{|\\\}/)
            paren.to_s.gsub("\\", "")
          else
            Latex::Constants::LEFT_RIGHT_PARENTHESIS[paren.to_sym]
          end
  get_class(function).new(paren)
end

.math_display_text_objects(object) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 1109

def math_display_text_objects(object)
  class_names = ["plus", "minus", "circ", "equal", "symbol"].freeze
  class_names.include?(object.class_name)
end

.mathml_unary_classes(text_array, omml: false, unicode_only: false, lang: nil) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 425

def mathml_unary_classes(text_array, omml: false, unicode_only: false,
lang: nil)
  return [] if text_array.empty?

  compacted = text_array.compact
  return filter_values(compacted) unless compacted.any?(String)

  string  = compacted.join
  classes = Mathml::Constants::CLASSES
  unicode = string_to_html_entity(string)
  return symbols_class(unicode, lang: lang) if unicode_only && unicode

  symbol = Mathml::Constants::UNICODE_SYMBOLS[unicode.strip.to_sym]
  if classes.include?(symbol&.strip)
    get_class(symbol.strip).new
  elsif classes.any?(string&.strip)
    get_class(string.strip).new
  elsif omml
    text_classes(string,
                 lang: lang)
  else
    symbols_class(unicode, lang: lang)
  end
end

.mrow_left_right(mrow = []) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 680

def mrow_left_right(mrow = [])
  object = mrow.first
  !(
    (object.is_a?(Math::Function::TernaryFunction) && object.any_value_exist? && (mrow.length <= 2)) ||
    (object.is_a?(Math::Function::UnaryFunction) && mrow.length == 1)
  )
end

.nary_fonts(nary, lang:) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 380

def nary_fonts(nary, lang:)
  narypr  = nary.first.flatten.compact
  subsup  = narypr.any?("undOvr") ? "undOvr" : "subSup"
  unicode = narypr.any?(Hash) ? narypr.first[:chr] : "∫"
  Math::Function::Nary.new(
    symbols_class(string_to_html_entity(unicode), lang: lang),
    filter_values(nary[1]),
    filter_values(nary[2]),
    filter_values(nary[3]),
    { type: subsup },
  )
end

.nil_to_none_object(value) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 580

def nil_to_none_object(value)
  return value unless value.any?(NilClass) || value.any? do |val|
    val.is_a?(Array) && val.empty?
  end

  value.each.with_index do |val, index|
    next unless val.nil? || val.is_a?(Array)

    value[index] = Math::Function::None.new
  end
end

.notations_to_mask(notations) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 1076

def notations_to_mask(notations)
  mask = notations.split.map do |notation|
    MASK_CLASSES.key(notation)
  end
  mask.inject(*:+) ^ 15
end

.organize_options(table_data, column_align) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 195

def organize_options(table_data, column_align)
  return column_align if column_align.length <= 1

  align = [column_align&.shift]
  table_data.insert(0, *column_align)
  align
end

.organize_table(array, column_align: nil, options: nil) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 164

def organize_table(array, column_align: nil, options: nil)
  table = []
  table_data = []
  table_row = []
  organize_options(array, column_align) if options
  string_columns = column_align&.map { |column| column.is_a?(Math::Symbols::Paren) ? "|" : column.value }
  array.each do |data|
    if data&.separate_table
      table_row << Math::Function::Td.new(filter_table_data(table_data).compact)
      table_data = []
      if data.linebreak?
        organize_tds(table_row.flatten, string_columns.dup, options)
        table << Math::Function::Tr.new(table_row)
        table_row = []
      end
      next
    end
    table_data << data
  end
  table_row << Math::Function::Td.new(table_data.compact) if table_data
  unless table_row.nil? || table_row.empty?
    organize_tds(table_row.flatten, string_columns.dup, options)
    table << Math::Function::Tr.new(table_row)
  end
  unless column_align.nil? || column_align.empty?
    table_separator(string_columns, table,
                    symbol: "|")
  end
  table
end

.organize_tds(tr_array, column_align, options) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 216

def organize_tds(tr_array, column_align, options)
  return tr_array if column_align.nil? || column_align.empty?

  column_align.reject! { |string| string == "|" }
  column_align = column_align * tr_array.length if options
  tr_array.map.with_index do |td, ind|
    columnalign = ALIGNMENT_LETTERS[column_align[ind]&.to_sym]
    td.parameter_two = { columnalign: columnalign } if columnalign
  end
end

.ox_element(node, attributes: [], namespace: "") ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 311

def ox_element(node, attributes: [], namespace: "")
  namespace = "#{namespace}:" unless namespace.empty?

  element = Plurimath.xml_engine.new_element("#{namespace}#{node}")
  element.set_attr(attributes)
  element
end

.paren_able?(arr = [], mrow = []) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/plurimath/utility.rb', line 754

def paren_able?(arr = [], mrow = [])
  arr.any? do |opening, closing|
    symbol_value(mrow.first,
                 opening.to_s) && symbol_value(mrow.last, closing.to_s)
  end
end

.paren_files ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 266

def paren_files
  Math::Symbols::Paren.descendants
end

.parens_hash(lang, skipables: nil) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 290

def parens_hash(lang, skipables: nil)
  @@parens ||= {}
  lang_parens = @@parens[lang]
  return lang_parens if lang_parens && !lang_parens.empty?

  lang_parens = {}
  paren_files.map do |class_object|
    class_object::INPUT[lang]&.flatten&.each do |symbol|
      next if skipables&.include?(class_object.new.class_name)
      next if lang_parens.key?(symbol)

      lang_parens[symbol] = class_object
    end
  end
  @@parens[lang] = lang_parens.sort_by { |v, _| -v.length }.to_h
end

.populate_function_classes(mrow = [], lang:) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 688

def populate_function_classes(mrow = [], lang:)
  flatten_mrow = mrow.flatten.compact
  unary_function_classes(flatten_mrow, lang: lang)
  binary_function_classes(flatten_mrow, lang: lang)
  ternary_function_classes(flatten_mrow)
  flatten_mrow
end

.pr_element(main_tag, wi_tag = false, namespace: "") ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 340

def pr_element(main_tag, wi_tag = false, namespace: "")
  tag_name = "#{main_tag}Pr"
  ox_element(
    tag_name,
    namespace: namespace,
  ) << rpr_element(wi_tag: wi_tag)
end

.primes_constants ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 1026

def primes_constants
  primes = {}
  primes
    .merge!(UnicodeMath::Constants::PREFIXED_PRIMES)
    .merge({ sprime: "&#x27;" })
end

.recursion_fraction(frac, numerator, options) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 943

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/utility.rb', line 958

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/utility.rb', line 987

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

.rpr_element(wi_tag: false) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 319

def rpr_element(wi_tag: false)
  rpr_element = ox_element("rPr", namespace: "w")
  attributes = { "w:ascii": "Cambria Math", "w:hAnsi": "Cambria Math" }
  rpr_element << ox_element(
    "rFonts",
    namespace: "w",
    attributes: attributes,
  )
  rpr_element << ox_element("i", namespace: "w") if wi_tag
  rpr_element
end

.sequence_slashed_values(values, lang:) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 1092

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/utility.rb', line 1083

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

.string_to_html_entity(string) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 458

def string_to_html_entity(string)
  HTML_ENTITIES.encode(
    string.frozen? ? string : string.force_encoding("UTF-8"),
    :hexadecimal,
  )
end

.sub_sup_method?(sub_sup) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/plurimath/utility.rb', line 242

def sub_sup_method?(sub_sup)
  if sub_sup.methods.include?(:class_name)
    Html::Constants::SUB_SUP_CLASSES.value?(sub_sup.class_name.to_sym)
  end
end

.sup_recursion(sup_script, sup_recursion) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 1005

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_object(value, lang: nil) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 637

def symbol_object(value, lang: nil)
  value = case value
          when "ℒ" then "{:"
          when "ℛ" then ":}"
          when "ᑕ" then "&#x2329;"
          when "ᑐ" then "&#x232a;"
          else value
          end
  symbols_class(value, lang: lang)
end

.symbol_prime?(obj) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/plurimath/utility.rb', line 1021

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

.symbol_to_text(symbol, lang:, options:, intent: false) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 827

def symbol_to_text(symbol, lang:, options:, intent: false)
  case lang
  when :asciimath
    symbol.to_asciimath(options: options)
  when :latex
    symbol.to_latex(options: options)
  when :mathml
    symbol.to_mathml_without_math_tag(intent,
                                      options: options).nodes.first
  when :omml
    symbol.to_omml_without_math_tag(true, options: options)
  when :unicodemath
    symbol.to_unicodemath(options: options)
  end
end

.symbol_value(object, value) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 408

def symbol_value(object, value)
  (object.is_a?(Math::Symbols::Comma) if value&.include?(",")) ||
    (object.is_a?(Math::Symbols::Minus) if value&.include?("-")) ||
    (object.is_a?(Math::Symbols::Paren::Vert) if value&.include?("|")) ||
    (object.is_a?(Math::Symbols::Symbol) && object&.value&.include?(value)) ||
    (value == "\\\\" && object.is_a?(Math::Function::Linebreak))
end

.symbols_class(string, lang:, table: false) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 450

def symbols_class(string, lang:, table: false)
  return string unless string.is_a?(String) || string.is_a?(Parslet::Slice)
  return latex_table_curly_paren(string) if table && lang == :latex

  all_symbols_classes(lang)[string.to_s.strip]&.new ||
    Math::Symbols::Symbol.new(string)
end

.symbols_files ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 270

def symbols_files
  Math::Symbols::Symbol.descendants
end

.symbols_hash(lang) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 274

def symbols_hash(lang)
  @@symbols ||= {}
  lang_symbols = @@symbols[lang]
  return lang_symbols if lang_symbols && !lang_symbols.empty?

  lang_symbols = {}
  symbols_files.map do |class_object|
    class_object::INPUT[lang]&.flatten&.each do |symbol|
      next if lang_symbols.key?(symbol)

      lang_symbols[symbol] = class_object
    end
  end
  @@symbols[lang] = lang_symbols.sort_by { |v, _| -v.length }.to_h
end

.table_options(table_data) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 203

def table_options(table_data)
  rowline = ""
  table_data.map do |tr|
    if tr&.parameter_one&.first&.parameter_one&.first.is_a?(Math::Symbols::Hline)
      rowline += "solid "
    else
      rowline += "none "
    end
  end
  options = { rowline: rowline.strip } if rowline.include?("solid")
  options || {}
end

.table_separator(separator, value, symbol: "solid") ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 473

def table_separator(separator, value, symbol: "solid")
  sep_symbol = Math::Function::Td.new([Math::Symbols::Paren::Vert.new])
  separator&.each_with_index do |sep, ind|
    next unless sep == symbol

    value.map do |val|
      val.parameter_one.insert(ind + 1, sep_symbol) if symbol == "solid"
      val.parameter_one.insert(ind, sep_symbol) if symbol == "|"
      begin
        (val.parameter_one[val.parameter_one.index(nil)] =
           Math::Function::Td.new([]))
      rescue StandardError
        nil
      end
      val
    end
  end
  value
end

.table_td(object) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 627

def table_td(object)
  new_object = case object
               when Math::Function::Td
                 object
               else
                 Math::Function::Td.new([object])
               end
  Array(new_object)
end

.td_value(td_object) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 416

def td_value(td_object)
  str_classes = [String, Parslet::Slice]
  if str_classes.include?(td_object.class) && td_object.to_s.empty?
    return Math::Function::Text.new(nil)
  end

  td_object
end

.td_values(objects, slicer) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 397

def td_values(objects, slicer)
  sliced = objects.slice_when { |object, _| symbol_value(object, slicer) }
  tds = sliced.map do |slice|
    Math::Function::Td.new(
      slice.delete_if { |d| symbol_value(d, slicer) }.compact,
    )
  end
  tds << Math::Function::Td.new([]) if symbol_value(objects.last, slicer)
  tds
end

.ternary_function_classes(mrow) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 739

def ternary_function_classes(mrow)
  ternary_class = Math::Function::TernaryFunction
  if mrow.any?(ternary_class) && mrow.length > 1
    mrow.each_with_index do |object, ind|
      if object.is_a?(ternary_class)
        next if [Math::Function::Fenced, Math::Function::Multiscript].include?(object.class)
        next unless object.parameter_one || object.parameter_two
        next if object.parameter_three

        object.parameter_three = filter_values(mrow.delete_at(ind + 1))
      end
    end
  end
end

.text_classes(text, lang:) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 358

def text_classes(text, lang:)
  return nil unless text

  text = filter_values(text) unless text.is_a?(String)
  return text if text.is_a?(Math::Core)

  if text&.scan(/[[:digit:]]/)&.length == text&.length
    Math::Number.new(text)
  elsif text&.match?(/[a-zA-Z]/)
    Math::Function::Text.new(text, lang: lang)
  else
    text = string_to_html_entity(text)
      .gsub("&#x26;", "&")
      .gsub("&#x3c;", "<")
      .gsub("&#x27;", "'")
      .gsub("&#xa0;", " ")
      .gsub("&#x3e;", ">")
      .gsub("&#xa;", "\n")
    symbols_class(text, lang: lang)
  end
end

.transform_accents(accents, lang:) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 858

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, function: true,
                                   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, function: true,
                                   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

.unary_function_classes(mrow, lang:) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 720

def unary_function_classes(mrow, lang:)
  unary_class = Math::Function::UnaryFunction
  if mrow.any?(String) || mrow.any?(unary_class)
    mrow.each_with_index do |object, ind|
      if object.is_a?(String)
        mrow[ind] =
          mathml_unary_classes([object], lang: lang)
      end
      object = mrow[ind] if object.is_a?(String)
      next unless object.is_a?(unary_class)
      next if object.is_a?(Math::Function::Text)
      next if object.parameter_one || mrow[ind + 1].nil?
      next unless ind.zero?

      object.parameter_one = mrow.delete_at(ind + 1)
    end
  end
end

.unfenced_value(object, paren_specific: false) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 592

def unfenced_value(object, paren_specific: false)
  case object
  when Math::Function::Fenced
    if !paren_specific || (paren_specific && valid_paren?(object))
      filter_values(object.parameter_two)
    else
      object
    end
  when Array
    filter_values(object)
  else
    object
  end
end

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



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# File 'lib/plurimath/utility.rb', line 843

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/utility.rb', line 904

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

.update_nodes(element, nodes) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 331

def update_nodes(element, nodes)
  nodes&.each do |node|
    next update_nodes(element, node) if node.is_a?(Array)

    element << node unless node.nil?
  end
  element
end

.updated_primes(prime) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 913

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

.valid_class(object) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 674

def valid_class(object)
  text = object.extract_class_name_from_text
  (object.extractable? && Asciimath::Constants::SUB_SUP_CLASSES.include?(text)) ||
    Latex::Constants::SYMBOLS[text.to_sym] == :power_base
end

.valid_paren?(object) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/plurimath/utility.rb', line 607

def valid_paren?(object)
  object.parameter_one.is_a?(Math::Symbols::Paren::Lround) &&
    object.parameter_three.is_a?(Math::Symbols::Paren::Rround) &&
    object.options.keys.none? do |k|
      %i[open_paren close_paren].any?(k.to_sym)
    end &&
    !object.parameter_one.mini_sup_sized &&
    !object.parameter_three.mini_sub_sized &&
    object.options.empty?
end

.validate_left_right(fields = []) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 657

def validate_left_right(fields = [])
  fields.each do |field|
    if field.is_a?(Math::Formula) && field.value.first.is_a?(Math::Function::Left)
      field.left_right_wrapper = true
    end
  end
end

.validate_math_zone(object, lang:, intent: false, options: nil) ⇒ Object 



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# File 'lib/plurimath/utility.rb', line 781

def validate_math_zone(object, lang:, intent: false, options: nil)
  return false unless object

  if object.is_a?(Math::Formula)
    filter_math_zone_values(object.value, lang: lang, intent: intent,
                                          options: options).find do |value|
      !(value.is_a?(Math::Function::Text) || value.is_a?(Math::Symbols::Symbol))
    end
  else
    !(TEXT_CLASSES.include?(object.class_name) || object.is_a?(Math::Symbols::Symbol))
  end
end