improved_word_ml.rb

module Sablon
  module Redcarpet
    module Render
      class ImprovedWordML < WordML
        LIST_PATTERN = <<-XML.gsub("\n", "")
<w:p>
<w:pPr>
<w:pStyle w:val="%s" />
<w:numPr>
<w:ilvl w:val="%s"/>
<w:numId w:val="%s"/>
</w:numPr>
</w:pPr>
%s
</w:p>
XML

        def list_item(content, list_type)
          list_style = LIST_STYLE_MAPPING[list_type]
          indentation_level = 0
          # add correct indentation information reading our special pattern
          content.gsub!(/#####(\d)#####/) do |match|
            indentation_level = $1.to_i
            ''
          end

          LIST_PATTERN % [list_style, indentation_level, 1, content]
        end

        def preprocess(full_document)
          # remove blank spaces at the beginning of lists and save indentation info with a special pattern
          # redcarpet will treat all items as level 0 list items, which is required to work with WordML
          # and we will add correct indentation information later on list_item()
          full_document.gsub(/^( +)- /) do |_|
            "- ######{$1.size}#####"
          end
        end
      end
    end
  end
end