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# frozen_string_literal: true
# Generated HTML is transformed back to GFM by app/assets/javascripts/behaviors/markdown/marks/inline_diff.js
module Banzai
module Filter
class InlineDiffFilter < HTML::Pipeline::Filter
IGNORED_ANCESTOR_TAGS = %w(pre code tt).to_set
INLINE_DIFF_DELETION_UNTRUSTED = '(?:\[\-(.*?)\-\]|\{\-(.*?)\-\})'
INLINE_DIFF_DELETION_UNTRUSTED_REGEX =
Gitlab::UntrustedRegexp.new(INLINE_DIFF_DELETION_UNTRUSTED, multiline: false)
INLINE_DIFF_ADDITION_UNTRUSTED = '(?:\[\+(.*?)\+\]|\{\+(.*?)\+\})'
INLINE_DIFF_ADDITION_UNTRUSTED_REGEX =
Gitlab::UntrustedRegexp.new(INLINE_DIFF_ADDITION_UNTRUSTED, multiline: false)
def call
doc.xpath('descendant-or-self::text()').each do |node|
next if has_ancestor?(node, IGNORED_ANCESTOR_TAGS)
content = node.to_html
html_content = inline_diff_filter(content)
next if content == html_content
node.replace(html_content)
end
doc
end
def inline_diff_filter(text)
html_content = INLINE_DIFF_DELETION_UNTRUSTED_REGEX.replace_gsub(text) do |match|
%(<span class="idiff left right deletion">#{match[1]}#{match[2]}</span>)
end
INLINE_DIFF_ADDITION_UNTRUSTED_REGEX.replace_gsub(html_content) do |match|
%(<span class="idiff left right addition">#{match[1]}#{match[2]}</span>)
end
end
end
end
end
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