blob: 44acc7805b4a0aaac7b2f88e2085032d13255109 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
# frozen_string_literal: true
# Generated HTML is transformed back to GFM by app/assets/javascripts/behaviors/markdown/nodes/image.js
module Banzai
module Filter
# HTML filter that wraps links around inline images.
class ImageLinkFilter < HTML::Pipeline::Filter
# 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.
#
# If `link_replaces_image` context parameter is provided, the image is going
# to be replaced with a link to an image.
def call
doc.xpath('descendant-or-self::img[not(ancestor::a)]').each do |img|
link_replaces_image = !!context[:link_replaces_image]
html_class = link_replaces_image ? 'with-attachment-icon' : 'no-attachment-icon'
link = doc.document.create_element(
'a',
class: html_class,
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 = if link_replaces_image
img['alt'] || img['data-src'] || img['src']
else
img.clone
end
img.replace(link)
end
doc
end
end
end
end
|