class Kramdown::Converter::Toc
Converts a Kramdown::Document
to an element tree that represents the table of contents.
The returned tree consists of Element
objects of type :toc where the root element is just used as container object. Each :toc element contains as value the wrapped :header element and under the attribute key :id the header ID that should be used (note that this ID may not exist in the wrapped element).
Since the TOC tree consists of special :toc elements, one cannot directly feed this tree to other converters!
Public Class Methods
new(root, options)
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Calls superclass method
Kramdown::Converter::Base::new
# File lib/kramdown/converter/toc.rb, line 26 def initialize(root, options) super @toc = Element.new(:toc) @stack = [] @options[:template] = '' end
Public Instance Methods
convert(el)
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# File lib/kramdown/converter/toc.rb, line 33 def convert(el) if el.type == :header && in_toc?(el) attr = el.attr.dup attr['id'] = generate_id(el.options[:raw_text]) if @options[:auto_ids] && !attr['id'] add_to_toc(el, attr['id']) if attr['id'] else el.children.each {|child| convert(child) } end @toc end
Private Instance Methods
add_to_toc(el, id)
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# File lib/kramdown/converter/toc.rb, line 46 def add_to_toc(el, id) toc_element = Element.new(:toc, el, id: id) success = false until success if @stack.empty? @toc.children << toc_element @stack << toc_element success = true elsif @stack.last.value.options[:level] < el.options[:level] @stack.last.children << toc_element @stack << toc_element success = true else @stack.pop end end end