Class: Banzai::Filter::ImageLinkFilter

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

Overview

HTML filter that wraps links around inline images.

Instance Method Summary collapse

Instance Method Details

#call ⇒ Object

Find every image that isn't already wrapped in an `a` tag, create a new node (a link to the image source), copy the image as a child of the anchor, and then replace the img with the link-wrapped version.


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

def call
  doc.xpath('descendant-or-self::img[not(ancestor::a)]').each do |img|
    link = doc.document.create_element(
      'a',
      class: 'no-attachment-icon',
      href: img['data-src'] || img['src'],
      target: '_blank',
      rel: 'noopener noreferrer'
    )

    # make sure the original non-proxied src carries over to the link
    link['data-canonical-src'] = img['data-canonical-src'] if img['data-canonical-src']

    link.children = img.clone

    img.replace(link)
  end

  doc
end