Class: JekyllCommonMarkCustomRenderer

Inherits:
CommonMarker::HtmlRenderer
  • Object
show all
Defined in:
lib/jekyll-commonmark-ghpages.rb

Overview

A customized version of CommonMarker::HtmlRenderer which:

  • outputs Kramdown-style header IDs.

  • performs syntax highlighting in code blocks.

Instance Method Summary collapse

Instance Method Details

#code_block(node) ⇒ Object 



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# File 'lib/jekyll-commonmark-ghpages.rb', line 27

def code_block(node)
  lang = if node.fence_info && !node.fence_info.empty?
           node.fence_info.split(/[\s,]/)[0]
         end

  content = node.string_content

  if lang && lexer = ::Rouge::Lexer.find_fancy(lang, content)
    block do
      out("<div class=\"language-#{lang} highlighter-rouge\">")
      out(::Rouge::Formatters::HTMLLegacy.new(css_class: 'highlight').format(lexer.lex(content)))
      out("</div>")
    end
    return
  end

  if option_enabled?(:GITHUB_PRE_LANG)
    out("<pre#{sourcepos(node)}")
    out(' lang="', lang, '"') if lang
    out('><code>')
  else
    out("<pre#{sourcepos(node)}><code")
    if lang
      out(' class="language-', lang, '">')
    else
      out('>')
    end
  end
  out(escape_html(content))
  out('</code></pre>')
end

#header(node) ⇒ Object 



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# File 'lib/jekyll-commonmark-ghpages.rb', line 13

def header(node)
  block do
    old_stream = @stream
    @stream = StringIO.new(String.new.force_encoding("utf-8"))
    out(:children)
    content = @stream.string
    @stream = old_stream

    id = generate_id(content)
    out("<h", node.header_level, "#{sourcepos(node)} id=\"#{id}\">",
        content, "</h", node.header_level, ">")
  end
end