Class: Banzai::Filter::InlineDiffFilter

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

Constant Summary collapse

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).freeze
INLINE_DIFF_ADDITION_UNTRUSTED = 
'(?:\[\+(.*?)\+\]|\{\+(.*?)\+\})'
INLINE_DIFF_ADDITION_UNTRUSTED_REGEX = 
Gitlab::UntrustedRegexp.new(INLINE_DIFF_ADDITION_UNTRUSTED, multiline: false).freeze

Instance Method Summary collapse

Instance Method Details

#call ⇒ Object 



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# File 'lib/banzai/filter/inline_diff_filter.rb', line 17

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

#inline_diff_filter(text) ⇒ Object 



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# File 'lib/banzai/filter/inline_diff_filter.rb', line 31

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