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| author | lonkaars <loek@pipeframe.xyz> | 2024-04-28 12:28:40 +0200 |
|---|---|---|
| committer | lonkaars <loek@pipeframe.xyz> | 2024-04-28 12:28:40 +0200 |
| commit | a2a2e04fcd623e515d3f106038d8d46f827d4c79 (patch) | |
| tree | 0611cb8b64bd8dd3d3b679b204f096c9ea2f2252 /_plugins/toc.rb | |
| parent | c171f4e5b83abdb3dd8b3ece6063a5b482ad3b6d (diff) | |
fix table of contents
Diffstat (limited to '_plugins/toc.rb')
| -rw-r--r-- | _plugins/toc.rb | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/_plugins/toc.rb b/_plugins/toc.rb new file mode 100644 index 0000000..216341d --- /dev/null +++ b/_plugins/toc.rb @@ -0,0 +1,62 @@ +require 'nokogiri' + +module Jekyll + class TOC < Liquid::Tag + def render context + # load HTML into nokogiri + html = context.registers[:page]['content'] + doc = Nokogiri::HTML(html) + + # enumerate over all h1-4 headings + @els = doc.css("h1, h2, h3, h4") + return '<div class="chapterChildren">%s</div>' % [ output_toc ] + end + + def output_toc + # empty toc (this check prevents crash) + return "" if @els.length == 0 + + output = '<ul>' + + current_level = el_level(@els[0]) + + while @els.length > 0 + el = @els[0] + el_next = @els[1] + level = el_level(el) + level_next = el_level(el_next || el) # || el to prevent crash on end of list + + if level >= level_next + output += '<li>' + else + output += '<li class="stub"><details open>' + output += '<summary>' + end + + output += '<a href="#%s">%s</a>' % [ el['id'], el.inner_html ] + @els.shift() + + if level >= level_next + output += '</li>' + else + output += '</summary>' + output += output_toc + output += '</details></li>' + end + + break if level_next < level + end + + output += '</ul>' + + return output + end + + def el_level el + return Integer(el.name[1..]) + end + end +end + +Liquid::Template.register_tag('toc', Jekyll::TOC) + |