Class: Jekyll::HighlightBlock

Inherits:
Liquid::Block
  • Object
show all
Includes:
Liquid::StandardFilters
Defined in:
lib/jekyll/tags/highlight.rb

Constant Summary collapse

SYNTAX =

The regular expression syntax checker. Start with the language specifier. Follow that by zero or more space separated options that take one of two forms:

  1. name

  2. name=value

/^([a-zA-Z0-9.+#-]+)((\s+\w+(=\w+)?)*)$/

Instance Method Summary collapse

Constructor Details

#initialize(tag_name, markup, tokens) ⇒ HighlightBlock

Returns a new instance of HighlightBlock.



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# File 'lib/jekyll/tags/highlight.rb', line 14

def initialize(tag_name, markup, tokens)
  super
  if markup.strip =~ SYNTAX
    @lang = $1
    if defined?($2) && $2 != ''
      tmp_options = {}
      $2.split.each do |opt|
        key, value = opt.split('=')
        if value.nil?
          if key == 'linenos'
            value = 'inline'
          else
            value = true
          end
        end
        tmp_options[key] = value
      end
      tmp_options = tmp_options.to_a.sort.collect { |opt| opt.join('=') }
      # additional options to pass to Albino
      @options = { 'O' => tmp_options.join(',') }
    else
      @options = {}
    end
  else
    raise SyntaxError.new("Syntax Error in 'highlight' - Valid syntax: highlight <lang> [linenos]")
  end
end

Instance Method Details

#add_code_tags(code, lang) ⇒ Object 



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# File 'lib/jekyll/tags/highlight.rb', line 66

def add_code_tags(code, lang)
  # Add nested <code> tags to code blocks
  code = code.sub(/<pre>/,'<pre><code class="' + lang + '">')
  code = code.sub(/<\/pre>/,"</code></pre>")
end

#render(context) ⇒ Object 



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# File 'lib/jekyll/tags/highlight.rb', line 42

def render(context)
  if context.registers[:site].pygments
    render_pygments(context, super)
  else
    render_codehighlighter(context, super)
  end
end

#render_codehighlighter(context, code) ⇒ Object 



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# File 'lib/jekyll/tags/highlight.rb', line 57

def render_codehighlighter(context, code)
  #The div is required because RDiscount blows ass
  <<-HTML
<div>
  <pre><code class='#{@lang}'>#{h(code).strip}</code></pre>
</div>
  HTML
end

#render_pygments(context, code) ⇒ Object 



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# File 'lib/jekyll/tags/highlight.rb', line 50

def render_pygments(context, code)
  output = add_code_tags(Albino.new(code, @lang).to_s(@options), @lang)
  output = context["pygments_prefix"] + output if context["pygments_prefix"]
  output = output + context["pygments_suffix"] if context["pygments_suffix"]
  output
end