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Remove KaTeX CSS includes if we don't need them.

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Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>
This commit is contained in:
Danila Fedorin 2025-02-23 14:35:31 -08:00
parent 36e4feb668
commit d258886a64
1 changed files with 13 additions and 2 deletions
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15
convert.rb
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@ -25,13 +25,16 @@ class KatexRenderer
end end
def substitute(content) def substitute(content)
found_any = false
rendered = content.gsub /\\\(((?:[^\\]|\\[^\)])*)\\\)/ do |match| rendered = content.gsub /\\\(((?:[^\\]|\\[^\)])*)\\\)/ do |match|
found_any = true
render(false, $~[1]) render(false, $~[1])
end end
rendered = rendered.gsub /\$\$((?:[^\$]|$[^\$])*)\$\$/ do |match| rendered = rendered.gsub /\$\$((?:[^\$]|$[^\$])*)\$\$/ do |match|
found_any = true
render(true, $~[1]) render(true, $~[1])
end end
return rendered return rendered, found_any
end end
end end
@ -58,8 +61,16 @@ renderer = KatexRenderer.new(katex)
files.each do |file| files.each do |file|
puts "Rendering file: #{file}" puts "Rendering file: #{file}"
document = Nokogiri::HTML.parse(File.open(file)) document = Nokogiri::HTML.parse(File.open(file))
found_any = false
document.search('//*[not(ancestor-or-self::code or ancestor-or-self::script)]/text()').each do |t| document.search('//*[not(ancestor-or-self::code or ancestor-or-self::script)]/text()').each do |t|
t.replace(renderer.substitute(t.content)) rendered, found_any = renderer.substitute(t.content)
t.replace(rendered)
end end
# If we didn't find any mathematical equations, no need to include KaTeX CSS.
unless found_any
document.css('link[href$="katex.css"], link[href$="katex.min.css"]').each(&:remove)
end
File.write(file, document.to_html(encoding: 'UTF-8')) File.write(file, document.to_html(encoding: 'UTF-8'))
end end