Class: Plurimath::Utility::IntentEncoding

Inherits:
Plurimath::Utility show all
Defined in:
lib/plurimath/utility/intent_encoding.rb

Constant Summary collapse

SUP_TAGS = 
%w[msup mover].freeze
SUB_TAGS = 
%w[msub munder].freeze
INTENT_TEXT_NODES = 
%w[mi mo mn].freeze

Constants inherited from Plurimath::Utility

ALIGNMENT_LETTERS, FONT_STYLES, MASK_CLASSES, MGLYPH_ATTRS, MPADDED_ATTRS, MUNDER_CLASSES, PARENTHESIS, TABLE_SUPPORTED_ATTRS, TEXT_CLASSES, UNARY_CLASSES, UNICODEMATH_MENCLOSE_FUNCTIONS, UNICODE_REGEX

Class Method Summary collapse

Methods inherited from Plurimath::Utility

accent_value, all_symbols_classes, asciimath_symbol_object, attr_is_accent, attr_is_function, base_is_prime?, base_is_sub_or_sup?, base_recursion, binary_function_classes, capitalize, enclosure_attrs, fenceable_classes, filter_math_zone_values, filter_table_data, filter_values, find_pos_chr, frac_values, fractions, get_class, get_paren_class, get_symbol_class, get_table_class, hexcode_in_input, html_entity_to_unicode, identity_matrix, join_attr_value, latex_table_curly_paren, left_right_objects, math_display_text_objects, mathml_unary_classes, mrow_left_right, multiscript, nary_fonts, nil_to_none_object, notations_to_mask, organize_options, organize_table, organize_tds, ox_element, paren_able?, paren_files, parens_hash, populate_function_classes, pr_element, primes_constants, recursion_fraction, recursive_sub, recursive_sup, rpr_element, sequence_slashed_values, slashed_values, string_to_html_entity, sub_sup_method?, sup_recursion, symbol_object, symbol_prime?, symbol_to_text, symbol_value, symbols_class, symbols_files, symbols_hash, table_options, table_separator, table_td, td_value, td_values, ternary_function_classes, text_classes, transform_accents, unary_function_classes, unfenced_value, unicode_accents, unicode_fractions, update_nodes, updated_primes, valid_class, valid_paren?, validate_left_right, validate_math_zone

Class Method Details

.abs_intent(tag, intent_name, _options) ⇒ Object

Abs intent begin



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# File 'lib/plurimath/utility/intent_encoding.rb', line 100

def abs_intent(tag, intent_name, _options)
  tag["intent"] = "#{intent_name}(#{node_value(tag.nodes[1], 'a')})"
  tag
end

.binomial_fraction_intent(tag, intent_name, _) ⇒ Object

Binomial fraction intent begin



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# File 'lib/plurimath/utility/intent_encoding.rb', line 67

def binomial_fraction_intent(tag, intent_name, _)
  numerator = node_value(tag.nodes[1].nodes[0], "t")
  denominator = node_value(tag.nodes[1].nodes[1], "b")
  tag["intent"] = "#{intent_name}(#{numerator},#{denominator})"
  tag
end

.frac_intent(tag, _, options) ⇒ Object

Frac derivative intent begin



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# File 'lib/plurimath/utility/intent_encoding.rb', line 89

def frac_intent(tag, _, options)
  num = tag.nodes[0]
  den = tag.nodes[1]
  return partial_derivative(tag, options[:partial_derivative]) if partial_derivative?(num, den)
  return derivative(tag, options[:derivative]) if derivative?(num, den)

  tag
end

.function_intent(tag, intent_name = ":function", _) ⇒ Object

Function intent begin



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# File 'lib/plurimath/utility/intent_encoding.rb', line 60

def function_intent(tag, intent_name = ":function", _)
  tag.attributes["intent"] = intent_name
  tag
end

.interval_fence_intent(tag, intent_name, options) ⇒ Object

Interval fence intent begin



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# File 'lib/plurimath/utility/intent_encoding.rb', line 76

def interval_fence_intent(tag, intent_name, options)
  intent = options[intent_name]
  return function_intent(tag, intent, options) if intent_name == :fenced
  return binomial_fraction_intent(tag, intent, options) if intent_name == :binomial_coefficient

  first_value = fence_node_value(tag.nodes[1], "a")
  second_value = fence_node_value(tag.nodes[3], "b")
  tag["intent"] = "#{intent}(#{first_value},#{second_value})"
  tag
end

.nary_intent(field, intent_name, _) ⇒ Object 



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# File 'lib/plurimath/utility/intent_encoding.rb', line 31

def nary_intent(field, intent_name, _)
  sub_sup = field.nodes[0]
  base, power = power_base_intent(sub_sup)
  base, power = power_or_base_intent(sub_sup) unless base || power
  naryand = node_value(field.nodes[1], "naryand")
  field["intent"] = "#{intent_name}(#{base},#{power},#{naryand})"
  field
end

.naryand_intent(field, intent_name, options) ⇒ Object

Naryand intent begin



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# File 'lib/plurimath/utility/intent_encoding.rb', line 22

def naryand_intent(field, intent_name, options)
  return nary_intent(field, intent_name, options) if field.name == "mrow"

  base, power = power_base_intent(field)
  base, power = power_or_base_intent(field) unless base && power
  field["intent"] = "#{intent_name}(#{base},#{power})"
  field
end

.node_value(node, field_name) ⇒ Object

Intent common code begin



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

def node_value(node, field_name)
  return unless node
  return if node.name == "mo" && node.nodes[0] == "⬚"
  return html_entity_to_unicode(node.nodes.first) if valid_node_value?(node)
  return all_numeric(node) if all_numeric?(node)

  node[:arg] = field_name
  "$#{field_name}"
end

.power_base_intent(field) ⇒ Object

SubSup intent begin



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# File 'lib/plurimath/utility/intent_encoding.rb', line 42

def power_base_intent(field)
  return nil unless ["munderover", "msubsup"].include?(field.name)

  base = node_value(field.nodes[1], "l")
  power = node_value(field.nodes[2], "h")
  [base, power]
end

.power_or_base_intent(field) ⇒ Object 



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# File 'lib/plurimath/utility/intent_encoding.rb', line 50

def power_or_base_intent(field)
  value_node = field.nodes[1]
  return nil unless SUP_TAGS.include?(field.name) || SUB_TAGS.include?(field.name)
  return [nil, node_value(value_node, "h")] if SUP_TAGS.include?(field.name)

  [node_value(value_node, "l"), nil]
end