Module: Troy::Markdown::Rouge

Includes:
Rouge::Plugins::Redcarpet
Included in:
Renderer
Defined in:
lib/troy/markdown.rb

Overview

Create a new Redcarpet renderer, that prepares the code block to use rouge syntax.

Constant Summary collapse

ALERT_MARK =

Be more flexible than github and support any arbitrary name.

/^\[!(?<type>[A-Z]+)\](?<title>.*?)?$/

Instance Method Summary collapse

Instance Method Details

#block_quote(quote) ⇒ Object

Support alert boxes just like github. github.com/orgs/community/discussions/16925



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# File 'lib/troy/markdown.rb', line 29

def block_quote(quote)
  html = Nokogiri::HTML.fragment(quote)
  element = html.children.first
  matches = element.text.to_s.match(ALERT_MARK) if element
  return "<blockquote>#{quote}</blockquote>" unless matches

  element.remove

  type = matches[:type].downcase
  title = matches[:title].to_s.strip
  title = I18n.t(type, scope: :alerts, default: title)

  html = Nokogiri::HTML.fragment <<~HTML
    <div class="alert-message #{type}">
      <p class="alert-message--title"></p>
      #{html}
    </div>
  HTML

  if title.empty?
    html.css(".alert-message--title").first.remove
  else
    html.css(".alert-message--title").first.content = title
  end

  html.to_s
end

#header(text, level) ⇒ Object 



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# File 'lib/troy/markdown.rb', line 57

def header(text, level)
  matches = text.strip.match(HEADING_ID)
  title = matches[:text].strip
  html = Nokogiri::HTML.fragment("<h#{level}>#{title}</h#{level}>")
  heading = html.first_element_child
  title = heading.text

  id = matches[:id]
  id ||= permalink(title)

  heading_counter[id] += 1
  id = "#{id}-#{heading_counter[id]}" if heading_counter[id] > 1

  heading.add_child %[<a class="anchor" href="##{id}" aria-hidden="true" tabindex="-1"></a>] # rubocop:disable Style/LineLength
  heading.set_attribute :tabindex, "-1"
  heading.set_attribute(:id, id)

  heading.to_s
end

#heading_counter ⇒ Object 



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# File 'lib/troy/markdown.rb', line 87

def heading_counter
  @heading_counter ||= Hash.new {|h, k| h[k] = 0 }
end

#permalink(text) ⇒ Object 



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# File 'lib/troy/markdown.rb', line 77

def permalink(text)
  str = text.dup.unicode_normalize(:nfkd)
  str = str.gsub(/[^\x00-\x7F]/, "").to_s
  str.gsub!(/[^-\w]+/xim, "-")
  str.gsub!(/-+/xm, "-")
  str.gsub!(/^-?(.*?)-?$/, '\1')
  str.downcase!
  str
end