docs/_plugins/callout.rb


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# Source: http://stackoverflow.com/questions/19169849/how-to-get-markdown-processed-content-in-jekyll-tag-plugin

module Jekyll
  module Tags
    class CalloutTag < Liquid::Block

      def initialize(tag_name, type, tokens)
        super
        @type = type
        if type == "danger"
          @type = "danger"
        elsif type == "warning"
          @type = "warning"
        elsif type == "info"
          @type = "info"
        end
      end

      def render(context)
        site = context.registers[:site]
        converter = site.getConverterImpl(::Jekyll::Converters::Markdown)
        output = converter.convert(super(context))
        "<div class=\"bd-callout bd-callout-#{@type}\">#{output}</div>"
      end
    end
  end
end

Liquid::Template.register_tag('callout', Jekyll::Tags::CalloutTag)