.themes/classic/plugins/pullquote.rb
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 #
 # Author: Brandon Mathis
 # Based on the sematic pullquote technique by Maykel Loomans at http://miekd.com/articles/pull-quotes-with-html5-and-css/
 #
 # Outputs a span with a data-pullquote attribute set from the marked pullquote. Example:
 #
 #   {% pullquote %}
 #     When writing longform posts, I find it helpful to include pullquotes, which help those scanning a post discern whether or not a post is helpful.
 #     It is important to note, {" pullquotes are merely visual in presentation and should not appear twice in the text. "} That is why it is prefered
 #     to use a CSS only technique for styling pullquotes.
 #   {% endpullquote %}
 #   ...will output...
 #   <p>
 #     <span data-pullquote="pullquotes are merely visual in presentation and should not appear twice in the text.">
 #       When writing longform posts, I find it helpful to include pullquotes, which help those scanning a post discern whether or not a post is helpful.
 #       It is important to note, pullquotes are merely visual in presentation and should not appear twice in the text. This is why a CSS only approach #       for styling pullquotes is prefered.
 #     </span>
 #   </p>
 #
 
 module Jekyll
 
   class PullquoteTag < Liquid::Block
     PullQuoteMarkup = /\{(.+)\}/i
 
     def initialize(tag_name, markup, tokens)
       super
     end
 
     def render(context)
       output = super
       if output.join =~ /\{"\s*(.+)\s*"\}/
         @quote = $1
         "<span class='has-pullquote' data-pullquote='#{@quote}'>#{output.join.gsub(/\{"\s*|\s*"\}/, '')}</span>"
       else
         return "Surround your pullquote like this {! text to be quoted !}"
       end
     end
   end
 end
 
 Liquid::Template.register_tag('pullquote', Jekyll::PullquoteTag)