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+# 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 = "<figure role=code>\n"

+      source += @caption if @caption

+      if @filetype

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

+      else

+        source += "<pre><code>" + code.gsub!(/</,'&lt;') + "</code></pre>\n</figure>"

+      end

+      partial = Liquid::Template.parse(source)

+      context.stack do

+        partial.render(context)

+      end

+    end

+  end

+end

+

+Liquid::Template.register_tag('codeblock', Jekyll::CodeBlock)