diff options
Diffstat (limited to 'lib/banzai/filter')
-rw-r--r-- | lib/banzai/filter/inline_math_filter.rb | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/banzai/filter/inline_math_filter.rb b/lib/banzai/filter/inline_math_filter.rb new file mode 100644 index 00000000000..a63116c12ce --- /dev/null +++ b/lib/banzai/filter/inline_math_filter.rb @@ -0,0 +1,29 @@ +require 'uri' + +module Banzai + module Filter + # HTML filter that adds class="code math" and removes the dolar sign in $`2+2`$. + # + class InlineMathFilter < HTML::Pipeline::Filter + def call + doc.xpath("descendant-or-self::text()[substring(., string-length(.)) = '$']"\ + "/following-sibling::*[name() = 'code']"\ + "/following-sibling::text()[starts-with(.,'$')]").each do |el| + closing = el + code = el.previous + code[:class] = 'code math' + opening = code.previous + + closing.content = closing.content[1..-1] + opening.content = opening.content[0..-2] + + closing + end + + puts doc + + doc + end + end + end +end |