diff --git a/lib/banzai/filter/footnote_filter.rb b/lib/banzai/filter/footnote_filter.rb index 9752797643705e92ec19dd41a8329c8cf649ceab..de133774dfa7fbdbbdb263e3ea4f3b4034c4173d 100644 --- a/lib/banzai/filter/footnote_filter.rb +++ b/lib/banzai/filter/footnote_filter.rb @@ -29,21 +29,30 @@ module Banzai # Sanitization stripped off the section wrapper - add it back in first_footnote.parent.wrap('<section class="footnotes">') rand_suffix = "-#{random_number}" + modified_footnotes = {} doc.css('sup > a[id]').each do |link_node| ref_num = link_node[:id].delete_prefix(FOOTNOTE_LINK_ID_PREFIX) footnote_node = doc.at_css("li[id=#{fn_id(ref_num)}]") - backref_node = footnote_node.at_css("a[href=\"##{fnref_id(ref_num)}\"]") - if ref_num =~ INTEGER_PATTERN && footnote_node && backref_node - link_node[:href] += rand_suffix - link_node[:id] += rand_suffix - footnote_node[:id] += rand_suffix - backref_node[:href] += rand_suffix + if INTEGER_PATTERN.match?(ref_num) && (footnote_node || modified_footnotes[ref_num]) + link_node[:href] += rand_suffix + link_node[:id] += rand_suffix # Sanitization stripped off class - add it back in link_node.parent.append_class('footnote-ref') - backref_node.append_class('footnote-backref') + + unless modified_footnotes[ref_num] + footnote_node[:id] += rand_suffix + backref_node = footnote_node.at_css("a[href=\"##{fnref_id(ref_num)}\"]") + + if backref_node + backref_node[:href] += rand_suffix + backref_node.append_class('footnote-backref') + end + + modified_footnotes[ref_num] = true + end end end diff --git a/spec/lib/banzai/filter/footnote_filter_spec.rb b/spec/lib/banzai/filter/footnote_filter_spec.rb index 2e50e4e23518e08ead859f544cb38cc770192c9b..c6dcb4e46fd5df07cba88a5c54128e74b6866d60 100644 --- a/spec/lib/banzai/filter/footnote_filter_spec.rb +++ b/spec/lib/banzai/filter/footnote_filter_spec.rb @@ -11,6 +11,7 @@ describe Banzai::Filter::FootnoteFilter do let(:footnote) do <<~EOF <p>first<sup><a href="#fn1" id="fnref1">1</a></sup> and second<sup><a href="#fn2" id="fnref2">2</a></sup></p> + <p>same reference<sup><a href="#fn1" id="fnref1">1</a></sup></p> <ol> <li id="fn1"> <p>one <a href="#fnref1">鈫�</a></p> @@ -25,6 +26,7 @@ describe Banzai::Filter::FootnoteFilter do let(:filtered_footnote) do <<~EOF <p>first<sup class="footnote-ref"><a href="#fn1-#{identifier}" id="fnref1-#{identifier}">1</a></sup> and second<sup class="footnote-ref"><a href="#fn2-#{identifier}" id="fnref2-#{identifier}">2</a></sup></p> + <p>same reference<sup class="footnote-ref"><a href="#fn1-#{identifier}" id="fnref1-#{identifier}">1</a></sup></p> <section class="footnotes"><ol> <li id="fn1-#{identifier}"> <p>one <a href="#fnref1-#{identifier}" class="footnote-backref">鈫�</a></p>