70 lines
1.8 KiB
Ruby
70 lines
1.8 KiB
Ruby
|
# -*- coding: utf-8; frozen_string_literal: true -*-
|
||
|
|
#
|
||
|
|
#--
|
||
|
|
# Copyright (C) 2009-2019 Thomas Leitner <t_leitner@gmx.at>
|
||
|
|
#
|
||
|
|
# This file is part of kramdown which is licensed under the MIT.
|
||
|
|
#++
|
||
|
|
#
|
||
|
|
|
||
|
|
require 'kramdown/converter'
|
||
|
|
|
||
|
|
module Kramdown
|
||
|
|
|
||
|
|
module Converter
|
||
|
|
|
||
|
|
# 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!
|
||
|
|
class Toc < Base
|
||
|
|
|
||
|
|
def initialize(root, options)
|
||
|
|
super
|
||
|
|
@toc = Element.new(:toc)
|
||
|
|
@stack = []
|
||
|
|
@options[:template] = ''
|
||
|
|
end
|
||
|
|
|
||
|
|
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
|
||
|
|
|
||
|
|
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
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
end
|