Module: RedclothCoderay

Defined in:
lib/redclothcoderay.rb

Constant Summary collapse

SINGLE_LINE = 
'<code class="inline_code">%s</code>'
MULTI_LINE = 
'<pre><code class="multiline_code">%s</code></pre>'
SOURCE_TAG_REGEXP = 
/(([\t\n])?<source(?:\:([a-z]+))?>(.+?)<\/source>[\t\n]?)/m
CODERAY_OPTIONS = 
{:wrap => nil, :css => :class}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.always_on ⇒ Object

Adds the syntax highlighter to all RedCloth#to_htmls, so that you don’t have to do that to_html(:textile, :refs_syntax_highlighter) thin.



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# File 'lib/redclothcoderay.rb', line 24

def self.always_on
  if RedCloth::VERSION.to_s < "4"
    RedCloth::DEFAULT_RULES << :refs_syntax_highlighter
  else
    RedCloth::TextileDoc.class_eval {
      alias :_to_html :to_html
      
      def to_html(*rules)
        rules << :refs_syntax_highlighter
        _to_html(*rules)
      end
    }
  end
end

.coderay_options(options) ⇒ Object 



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# File 'lib/redclothcoderay.rb', line 39

def self.coderay_options(options)
  CODERAY_OPTIONS.replace(options)
end

Instance Method Details

#refs_syntax_highlighter(text) ⇒ Object

The RedCloth extension that performs the syntax highlighting.



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# File 'lib/redclothcoderay.rb', line 8

def refs_syntax_highlighter(text)
  text.gsub!(SOURCE_TAG_REGEXP) do |m|
    all_of_it = $~[1]
    whitespace_before = $~[2]
    lang = ($~[3] || :ruby).to_sym
    code = $~[4].strip
    
    wrap_in = all_of_it =~ /\n/ ? MULTI_LINE : SINGLE_LINE
    highlighted = wrap_in % CodeRay.scan(code, lang).div(CODERAY_OPTIONS)
    
    "#{whitespace_before}<notextile>#{highlighted}</notextile>"
  end
end