# Title: Simple Code Blocks for Jekyll
 # Author: Brandon Mathis http://brandonmathis.com
 # Description: Write codeblocks with semantic HTML5 <figure> and <figcaption> elements and optional syntax highlighting — all with a simple, intuitive interface.
 #
 # Syntax: {% codeblock [title] [url] [link text] %}
 #
 # For syntax highlighting, put a file extension somewhere in the title. examples:
 # {% codeblock file.sh %}
 # {% codeblock Time to be Awesome! (awesome.rb) %}
 #
 # Example:
 #
 # {% codeblock Got pain? painreleif.sh http://site.com/painreleief.sh Download it! %}
 # $ rm -rf ~/PAIN
 # {% endcodeblock %}
 #
 # Output:
 #
 # <figure role=code>
 # <figcaption><span>Got pain? painrelief.sh</span> <a href="http://site.com/painrelief.sh">Download it!</a>
 # <div class="highlight"><pre><code class="sh">
 # -- nicely escaped highlighted code --
 # </code></pre></div>
 # </figure>
 #
 # Example 2 (no syntax highlighting):
 #
 # {% codeblock %}
 # <sarcasm>Ooooh, sarcasm... How original!</sarcasm>
 # {% endcodeblock %}
 #
 # <figure role=code>

 # <pre><code>&lt;sarcasm> Ooooh, sarcasm... How original!&lt;/sarcasm></code></pre>

 # </figure>
 #
 module Jekyll
 
   class CodeBlock < Liquid::Block
     CaptionUrlTitle = /(\S[\S\s]*)\s+(https?:\/\/)(\S+)\s+(.+)/i
     CaptionUrl = /(\S[\S\s]*)\s+(https?:\/\/)(\S+)/i
     Caption = /(\S[\S\s]*)/
     def initialize(tag_name, markup, tokens)
       @title = nil
       @caption = nil
       @highlight = true
       if markup =~ CaptionUrlTitle
         @file = $1

         @caption = "<figcaption><span>#{$1}</span><a href='#{$2 + $3}'>#{$4}</a></figcaption>"

       elsif markup =~ CaptionUrl
         @file = $1

         @caption = "<figcaption><span>#{$1}</span><a href='#{$2 + $3}'>link</a></figcaption>"

       elsif markup =~ Caption
         @file = $1
         @caption = "<figcaption><span>#{$1}</span></figcaption>\n"
       end
       if @file =~ /\S[\S\s]*\.(\w+)/
         @filetype = $1
       end
       super
     end
 
     def render(context)
       output = super
       code = super.join

       source = "<div><figure role=code>"

       source += @caption if @caption
       if @filetype

         source += "{% highlight #{@filetype} %}\n" + code + "\n{% endhighlight %}</figure></div>"

       else

         source += "<pre><code>" + code.lstrip.rstrip.gsub(/</,'&lt;') + "</code></pre></figure></div>"

       end
       partial = Liquid::Template.parse(source)
       context.stack do
         partial.render(context)
       end
     end
   end
 end
 
 Liquid::Template.register_tag('codeblock', Jekyll::CodeBlock)