Class: Banzai::Filter::PlantumlFilter

Inherits:
HTML::Pipeline::Filter
  • Object
show all
Defined in:
lib/banzai/filter/plantuml_filter.rb

Overview

HTML that replaces all ‘lang plantuml` tags with PlantUML img tags.

Instance Method Summary collapse

Instance Method Details

#call ⇒ Object 



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# File 'lib/banzai/filter/plantuml_filter.rb', line 11

def call
  return doc unless settings.plantuml_enabled? && doc.at_xpath(lang_tag)

  Gitlab::Plantuml.configure

  doc.xpath(lang_tag).each do |node|
    img_tag = Nokogiri::HTML::DocumentFragment.parse(
      Asciidoctor::PlantUml::Processor.plantuml_content(node.content, {})).css('img').first

    next if img_tag.nil?

    img_tag.set_attribute('data-diagram', 'plantuml')
    img_tag.set_attribute('data-diagram-src', "data:text/plain;base64,#{Base64.strict_encode64(node.content)}")

    node.parent.replace(img_tag)
  end

  doc
end