Contents

# frozen_string_literal: true

require "parslet"
require "parslet/convenience"
require_relative "parse"
require_relative "transform"
require_relative "constants"
module Plurimath
  class UnicodeMath
    class Parser
      attr_accessor :text

      LABELED_TR_REGEX = /"([^"]*(#|#|\\\\eqno)[^"]*[^"]*|[^"]*(#|#|\\\\eqno)[^"]*[^"]*)"/

      def initialize(text)
        text = pre_processing(text)
        @text = HTMLEntities.new.encode(text, :hexadecimal)
        @text.gsub!("&", "&")
        @text.gsub!(""", "\"")
        @text.gsub!(/⫷.*⫸/, "")
        @text.gsub!(/\\\\/, "\\")
        @text.gsub!(/\\u([\da-fA-F]{1,5})\w{0,5}/) { "&#x#{$1};" } # Converting \u#{xxxx} encoding to &#x#{xxxx};
        @text.strip!
      end

      def parse
        tree = Parse.new.parse(text)
        tree = post_processing(tree) if @splitted
        Math::Formula.new(
          Array(
            Transform.new.apply(tree),
          ),
        )
      end

      private

      def post_processing(tree)
        {
          labeled_tr_value: tree,
          labeled_tr_id: @splitted
        }
      end

      def pre_processing(text)
        text unless text.include?("#") && !text.match?(LABELED_TR_REGEX)

        text.gsub!(/✎\(.*(\#).*\)/) do |str|
          str.gsub!("#", "\"replacement\"")
        end
        splitted = text.split("#")
        splitted.first.gsub!("\"replacement\"", "#")
        @splitted = splitted.last if splitted.count > 1
        splitted.first
      end
    end
  end
end

Version data entries

14 entries across 14 versions & 1 rubygems

Version	Path
plurimath-0.8.14	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.13	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.12	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.11	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.10	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.9	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.8	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.7	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.6	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.5	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.4	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.2	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.1	lib/plurimath/unicode_math/parser.rb
plurimath-0.8.0	lib/plurimath/unicode_math/parser.rb