unepwcmc/SAPI

# Poor man's implementation. Don't event want to say more.
# Reason for this: pandoc was either extremely slow or hanging.
class HtmlToLatex

  # We're only expecting <p>, <i> and <b>
  def self.convert(input_str)
    doc = Nokogiri::HTML(input_str)
    output_str = ''
    doc.at_css("body").traverse do |n|
      if n.text?
        n_content = LatexToPdf.escape_latex(n.content)
        if n.parent.name == 'i'
          output_str << "\\textit{#{n_content}}"
        elsif n.parent.name == 'b'
          output_str << "\\textbf{#{n_content}}"
        else
          output_str << n_content
        end
      end
      if n.next_sibling && (n.next_sibling.name == 'p' || n.name == 'p')
        output_str << "\\newline "
      end
    end
    output_str
  end

end