Sha256: 33ff6827d03f73a2fdd67ea23df04c6b33e63b87c9a06926989de0d0b9e687be
Contents?: true
Size: 1.59 KB
Versions: 13
Compression:
Stored size: 1.59 KB
Contents
HEADING_TAG_DEPTHS = {
'h0' => 0,
'h1' => 1,
'h2' => 2,
'h3' => 3,
'h4' => 4,
'h5' => 5,
'h6' => 6,
}.freeze
module NavigationHelper
def navigation_from_content(content:, title: nil)
content = "<h0 class='injected'>#{title}</h0>\n" + content if title
document = build_document(content)
nodes = ['<ul class="Vlt-sidemenu Vlt-sidemenu--flat navigation js-navigation"><h4>On this page: </h4>']
last_node = nil
document.css('.reveal').remove
document.css('h0,h2,h3,h4,h5,h6').each do |heading|
# If it's a header within tabbed content (including Code Snippets) we don't want to treat
# the header as a navigation item in the sidebar
next unless heading.ancestors('.Vlt-tabs').empty?
# Same with callouts
next unless heading.ancestors('.Vlt-callout').empty?
if last_node.nil? || heading.name == last_node.name
# Do nothing (cleaner than adding wrapping further conditions)
elsif heading.name >= last_node.name # e.g. h2 -> h3
nodes << '<ul>'
else # e.g. h4 -> h2
(HEADING_TAG_DEPTHS[last_node.name] - HEADING_TAG_DEPTHS[heading.name]).times do
nodes << '</li></ul>'
end
end
nodes << <<~HEREDOC
<li>
<a class="Vlt-sidemenu__link" href="##{heading.attributes['id']}" data-scrollspy-id="#{heading['data-id']}">
#{heading.text}
</a>
HEREDOC
last_node = heading
end
nodes << '</li></ul>'
nodes.join("\n").html_safe
end
private
def build_document(content)
Nokogiri::HTML::DocumentFragment.parse(content)
end
end
Version data entries
13 entries across 13 versions & 1 rubygems