diff options
Diffstat (limited to 'lib/banzai/filter/markdown_post_escape_filter.rb')
-rw-r--r-- | lib/banzai/filter/markdown_post_escape_filter.rb | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/lib/banzai/filter/markdown_post_escape_filter.rb b/lib/banzai/filter/markdown_post_escape_filter.rb new file mode 100644 index 00000000000..ad32e9afbf5 --- /dev/null +++ b/lib/banzai/filter/markdown_post_escape_filter.rb @@ -0,0 +1,40 @@ +# frozen_string_literal: true + +module Banzai + module Filter + class MarkdownPostEscapeFilter < HTML::Pipeline::Filter + LITERAL_KEYWORD = MarkdownPreEscapeFilter::LITERAL_KEYWORD + LITERAL_REGEX = %r{#{LITERAL_KEYWORD}-(.*?)-#{LITERAL_KEYWORD}}.freeze + NOT_LITERAL_REGEX = %r{#{LITERAL_KEYWORD}-((%5C|\\).+?)-#{LITERAL_KEYWORD}}.freeze + SPAN_REGEX = %r{<span>(.*?)</span>}.freeze + + def call + return doc unless result[:escaped_literals] + + # For any literals that actually didn't get escape processed + # (for example in code blocks), remove the special sequence. + html.gsub!(NOT_LITERAL_REGEX, '\1') + + # Replace any left over literal sequences with `span` so that our + # reference processing is short-circuited + html.gsub!(LITERAL_REGEX, '<span>\1</span>') + + # Since literals are converted in links, we need to remove any surrounding `span`. + # Note: this could have been done in the renderer, + # Banzai::Renderer::CommonMark::HTML. However, we eventually want to use + # the built-in compiled renderer, rather than the ruby version, for speed. + # So let's do this work here. + doc.css('a').each do |node| + node.attributes['href'].value = node.attributes['href'].value.gsub(SPAN_REGEX, '\1') if node.attributes['href'] + node.attributes['title'].value = node.attributes['title'].value.gsub(SPAN_REGEX, '\1') if node.attributes['title'] + end + + doc.css('code').each do |node| + node.attributes['lang'].value = node.attributes['lang'].value.gsub(SPAN_REGEX, '\1') if node.attributes['lang'] + end + + doc + end + end + end +end |