Contents

module Numerals

  class Format

    class LatexNotation < Notation

      def assemble(output, text_parts)
        # 1.23\overline{456}\times10^{9}
        # TODO: padding
        if text_parts.special?
          output << text_parts.special
        else
          output << text_parts.sign
          if format.symbols.base_prefix
            output << format.symbols.base_prefix
          end
          output << text_parts.integer # or decide here if empty integer part is shown as 0?
          if text_parts.show_point?(format)
            output << format.symbols.point
          end
          output << text_parts.fractional
          if text_parts.repeat?
            output << "\\overline{#{text_parts.repeat}}"
          end
          if format.symbols.base_suffix || format.base != 10
            if format.symbols.base_prefix
              output << format.symbols.base_suffix
            else
              # show base suffix as a subscript
              subscript = format.symbols.base_suffix || base.to_s
              output << "_{#{subscript}}"
            end
          end
          if text_parts.exponent_value != 0 || format.mode.mode == :scientific
            output << "\\times"
            output << text_parts.exponent_base
            output << "^"
            output << "{#{text_parts.exponent}}"
          end
        end
      end

      private

      def escape(text)
        text.gsub('\\', '\\\\')
      end

      def unescape(text)
        text.gsub('\\\\', '\\')
      end

    end

    define_notation :latex, LatexNotation

  end

end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
numerals-0.3.1	lib/numerals/format/notations/latex.rb
numerals-0.3.0	lib/numerals/format/notations/latex.rb
numerals-0.2.1	lib/numerals/format/notations/latex.rb
numerals-0.2.0	lib/numerals/format/notations/latex.rb