# class RDoc::Markup::ToMarkdown

Outputs parsed markup as Markdown

### Public Class Methods

new(markup = nil) click to toggle source

Creates a new formatter that will output Markdown format text

Calls superclass method RDoc::Markup::ToRdoc.new

    # File lib/rdoc/markup/to_markdown.rb, line 12
    def initialize markup = nil
      super

      @headings[1] = ['# ',      '']
      @headings[2] = ['## ',     '']
      @headings[3] = ['### ',    '']
      @headings[4] = ['#### ',   '']
      @headings[5] = ['##### ',  '']
      @headings[6] = ['###### ', '']

      add_special_RDOCLINK
      add_special_TIDYLINK

      @hard_break = "  \n"
    end

### Public Instance Methods

accept_list_end(list) click to toggle source

Finishes consumption of `list`

Calls superclass method RDoc::Markup::ToRdoc#accept_list_end

    # File lib/rdoc/markup/to_markdown.rb, line 47
    def accept_list_end list
      @res << "\n"

      super
    end

accept_list_item_end(list_item) click to toggle source

Finishes consumption of `list_item`

    # File lib/rdoc/markup/to_markdown.rb, line 56
    def accept_list_item_end list_item
      width = case @list_type.last
              when :BULLET then
                4
              when :NOTE, :LABEL then
                use_prefix

                4
              else
                @list_index[-1] = @list_index.last.succ
                4
              end

      @indent -= width
    end

accept_list_item_start(list_item) click to toggle source

Prepares the visitor for consuming `list_item`

    # File lib/rdoc/markup/to_markdown.rb, line 75
    def accept_list_item_start list_item
      type = @list_type.last

      case type
      when :NOTE, :LABEL then
        bullets = Array(list_item.label).map do |label|
          attributes(label).strip
        end.join "\n"

        bullets << "\n:"

        @prefix = ' ' * @indent
        @indent += 4
        @prefix << bullets + (' ' * (@indent - 1))
      else
        bullet = type == :BULLET ? '*' : @list_index.last.to_s + '.'
        @prefix = (' ' * @indent) + bullet.ljust(4)

        @indent += 4
      end
    end

accept_list_start(list) click to toggle source

Prepares the visitor for consuming `list`

    # File lib/rdoc/markup/to_markdown.rb, line 100
    def accept_list_start list
      case list.type
      when :BULLET, :LABEL, :NOTE then
        @list_index << nil
      when :LALPHA, :NUMBER, :UALPHA then
        @list_index << 1
      else
        raise RDoc::Error, "invalid list type #{list.type}"
      end

      @list_width << 4
      @list_type << list.type
    end

accept_rule(rule) click to toggle source

Adds `rule` to the output

    # File lib/rdoc/markup/to_markdown.rb, line 117
    def accept_rule rule
      use_prefix or @res << ' ' * @indent
      @res << '-' * 3
      @res << "\n"
    end

accept_verbatim(verbatim) click to toggle source

Outputs `verbatim` indented 4 columns

    # File lib/rdoc/markup/to_markdown.rb, line 126
    def accept_verbatim verbatim
      indent = ' ' * (@indent + 4)

      verbatim.parts.each do |part|
        @res << indent unless part == "\n"
        @res << part
      end

      @res << "\n" unless @res =~ /\n\z/
    end

gen_url(url, text) click to toggle source

Creates a Markdown-style URL from `url` with `text`.

    # File lib/rdoc/markup/to_markdown.rb, line 140
    def gen_url url, text
      scheme, url, = parse_url url

      "[#{text.sub(%r{^#{scheme}:/*}i, '')}](#{url})"
    end

handle_rdoc_link(url) click to toggle source

Handles `rdoc-` type links for footnotes.

    # File lib/rdoc/markup/to_markdown.rb, line 149
    def handle_rdoc_link url
      case url
      when /^rdoc-ref:/ then
        $'
      when /^rdoc-label:footmark-(\d+)/ then
        "[^#{$1}]:"
      when /^rdoc-label:foottext-(\d+)/ then
        "[^#{$1}]"
      when /^rdoc-label:label-/ then
        gen_url url, $'
      when /^rdoc-image:/ then
        "![](#{$'})"
      when /^rdoc-[a-z]+:/ then
        $'
      end
    end

handle_special_HARD_BREAK(special) click to toggle source

Adds a newline to the output

    # File lib/rdoc/markup/to_markdown.rb, line 40
    def handle_special_HARD_BREAK special
      "  \n"
    end

handle_special_RDOCLINK(special) click to toggle source

Converts the rdoc-…: links into a Markdown.style links.

    # File lib/rdoc/markup/to_markdown.rb, line 187
    def handle_special_RDOCLINK special
      handle_rdoc_link special.text
    end

handle_special_TIDYLINK(special) click to toggle source

Converts the RDoc markup tidylink into a Markdown.style link.

    # File lib/rdoc/markup/to_markdown.rb, line 169
    def handle_special_TIDYLINK special
      text = special.text

      return text unless text =~ /\{(.*?)\}\[(.*?)\]/ or text =~ /(\S+)\[(.*?)\]/

      label = $1
      url   = $2

      if url =~ /^rdoc-label:foot/ then
        handle_rdoc_link url
      else
        gen_url url, label
      end
    end

init_tags() click to toggle source

Maps attributes to HTML sequences

    # File lib/rdoc/markup/to_markdown.rb, line 31
    def init_tags
      add_tag :BOLD, '**', '**'
      add_tag :EM,   '*',  '*'
      add_tag :TT,   '`',  '`'
    end