Remove unused TOCGenerator (#23986)
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8770473dbb
commit
dfa1be4ab4
1 changed files with 0 additions and 69 deletions
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# frozen_string_literal: true |
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class TOCGenerator |
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TARGET_ELEMENTS = %w(h1 h2 h3 h4 h5 h6).freeze |
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LISTED_ELEMENTS = %w(h2 h3).freeze |
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class Section |
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attr_accessor :depth, :title, :children, :anchor |
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def initialize(depth, title, anchor) |
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@depth = depth |
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@title = title |
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@children = [] |
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@anchor = anchor |
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end |
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delegate :<<, to: :children |
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end |
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def initialize(source_html) |
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@source_html = source_html |
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@processed = false |
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@target_html = '' |
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@headers = [] |
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@slugs = Hash.new { |h, k| h[k] = 0 } |
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end |
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def html |
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parse_and_transform unless @processed |
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@target_html |
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end |
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def toc |
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parse_and_transform unless @processed |
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@headers |
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end |
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private |
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def parse_and_transform |
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return if @source_html.blank? |
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parsed_html = Nokogiri::HTML.fragment(@source_html) |
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parsed_html.traverse do |node| |
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next unless TARGET_ELEMENTS.include?(node.name) |
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anchor = node['id'] || node.text.parameterize.presence || 'sec' |
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@slugs[anchor] += 1 |
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anchor = "#{anchor}-#{@slugs[anchor]}" if @slugs[anchor] > 1 |
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node['id'] = anchor |
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next unless LISTED_ELEMENTS.include?(node.name) |
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depth = node.name[1..-1] |
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latest_section = @headers.last |
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if latest_section.nil? || latest_section.depth >= depth |
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@headers << Section.new(depth, node.text, anchor) |
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else |
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latest_section << Section.new(depth, node.text, anchor) |
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end |
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end |
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@target_html = parsed_html.to_s |
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@processed = true |
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end |
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end |
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