# File ruby/lib/rdoc/markdown.rb, line 668
def initialize extensions = DEFAULT_EXTENSIONS, debug = false
  @debug      = debug
  @formatter  = RDoc::Markup::ToJoinedParagraph.new
  @extensions = extensions

  @references          = nil
  @unlinked_references = nil

  @footnotes       = nil
  @note_order      = nil
end

# File ruby/lib/rdoc/markdown.rb, line 656
def self.parse markdown
  parser = new

  parser.parse markdown
end

# File ruby/lib/rdoc/markdown.rb, line 683
def emphasis text
  if text =~ /\A[a-z\d.\/]+\z/i then
    "_#{text}_"
  else
    "<em>#{text}</em>"
  end
end

# File ruby/lib/rdoc/markdown.rb, line 737
def link_to content, label = content, text = nil
  raise ParseError, 'enable notes extension' if
    content.start_with? '^' and label.equal? content

  if ref = @references[label] then
    "{#{content}}[#{ref}]"
  elsif label.equal? content then
    "[#{content}]#{text}"
  else
    "[#{content}]#{text}[#{label}]"
  end
end

# File ruby/lib/rdoc/markdown.rb, line 754
def list_item_from unparsed
  parsed = inner_parse unparsed.join
  RDoc::Markup::ListItem.new nil, *parsed
end

# File ruby/lib/rdoc/markdown.rb, line 762
def note label
  #foottext = "rdoc-label:foottext-#{label}:footmark-#{label}"

  #ref.replace foottext if ref = @unlinked_notes.delete(label)

  @notes[label] = foottext

  #"{^1}[rdoc-label:footmark-#{label}:foottext-#{label}] "
end

# File ruby/lib/rdoc/markdown.rb, line 776
def note_for ref
  @note_order << ref

  label = @note_order.length

  "{*#{label}}[rdoc-label:foottext-#{label}:footmark-#{label}]"
end

# File ruby/lib/rdoc/markdown.rb, line 793
def paragraph parts
  parts = parts.map do |part|
    if "\n" == part then
      RDoc::Markup::HardBreak.new
    else
      part
    end
  end if break_on_newline?

  RDoc::Markup::Paragraph.new(*parts)
end

# File ruby/lib/rdoc/markdown.rb, line 808
def parse markdown
  @references          = {}
  @unlinked_references = {}

  markdown += "\n\n"

  setup_parser markdown, @debug
  peg_parse 'References'

  if notes? then
    @footnotes       = {}

    setup_parser markdown, @debug
    peg_parse 'Notes'

    # using note_order on the first pass would be a bug
    @note_order      = []
  end

  setup_parser markdown, @debug
  peg_parse

  doc = result

  if notes? and not @footnotes.empty? then
    doc << RDoc::Markup::Rule.new(1)

    @note_order.each_with_index do |ref, index|
      label = index + 1
      note = @footnotes[ref] or raise ParseError, "footnote [^#{ref}] not found"

      link = "{^#{label}}[rdoc-label:footmark-#{label}:foottext-#{label}] "
      note.parts.unshift link

      doc << note
    end
  end

  doc.accept @formatter

  doc
end

# File ruby/lib/rdoc/markdown.rb, line 855
def reference label, link
  if ref = @unlinked_references.delete(label) then
    ref.replace link
  end

  @references[label] = link
end

# File ruby/lib/rdoc/markdown.rb, line 866
def strong text
  if text =~ /\A[a-z\d.\/-]+\z/i then
    "*#{text}*"
  else
    "<b>#{text}</b>"
  end
end

# File ruby/lib/rdoc/markdown.rb, line 603
def self.extension name
  EXTENSIONS << name

  define_method "#{name}?" do
    extension? name
  end

  define_method "#{name}=" do |enable|
    extension name, enable
  end
end

# File ruby/lib/rdoc/markdown.rb, line 618
extension :break_on_newline

# File ruby/lib/rdoc/markdown.rb, line 623
extension :css

# File ruby/lib/rdoc/markdown.rb, line 628
extension :definition_lists

# File ruby/lib/rdoc/markdown.rb, line 705
def extension name, enable
  if enable then
    @extensions |= [name]
  else
    @extensions -= [name]
  end
end

# File ruby/lib/rdoc/markdown.rb, line 696
def extension? name
  @extensions.include? name
end

# File ruby/lib/rdoc/markdown.rb, line 633
extension :github

# File ruby/lib/rdoc/markdown.rb, line 638
extension :html

# File ruby/lib/rdoc/markdown.rb, line 643
extension :notes

# File ruby/lib/rdoc/markdown.rb, line 648
extension :strike