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module Banzai
module Filter
class InlineDiffFilter < HTML::Pipeline::Filter
IGNORED_ANCESTOR_TAGS = %w(pre code tt).to_set
def call
search_text_nodes(doc).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 = text.gsub(/(?:\[\-(.*?)\-\]|\{\-(.*?)\-\})/, '<span class="idiff left right deletion">\1\2</span>')
html_content.gsub(/(?:\[\+(.*?)\+\]|\{\+(.*?)\+\})/, '<span class="idiff left right addition">\1\2</span>')
end
end
end
end
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