Commonmarker characteristics

gistfile1.rb

# Commonmarker's default html renderer: https://github.com/gjtorikian/commonmarker/blob/master/lib/commonmarker/renderer/html_renderer.rb
# It has a sepparate method for each type of html tag it supports

# paragraph method:

def paragraph(node)
  if @in_tight && node.parent.type != :blockquote
    out(:children)
  else
    block do
      container('<p>', '</p>') do
        out(:children)
      end
    end
  end
end

gistfile2.rb

# We can override the header output by creating a custom renderer inheriting their default htmlrender
# https://github.com/gjtorikian/commonmarker#creating-a-custom-renderer

class MyHtmlRenderer < CommonMarker::HtmlRenderer
  def initialize
    super
    @headerid = 1
  end

  def header(node)
    block do
      out("<h", node.header_level, " id=\"", @headerid, "\">",
               :children, "</h", node.header_level, ">")
      @headerid += 1
    end
  end
end

gistfile3.rb

#For parsing something like #3232 and replacing it with a link we can go node by node to replace it
# https://github.com/gjtorikian/commonmarker#example-walking-the-ast

doc = CommonMarker.render_doc("# The site\n\n [GitHub](https://www.github.com) #3232 <ul><li>#3232</li></ul>")
doc.walk do |node|
  if node.type == :text
    if node.string_content.match(/ #[0-9]{1,4} /)
      link_node = Node.new(:link)
      link_node.url = "http://www.someurl.com"
      link_node.first_child.string_content = "Whatever we want to call it"
      node.insert_before(link_node)
      node.delete
    end
  end
end