class RDoc::Markup::ToHtml

def accept_blank_line(blank_line)
  # @res << annotate("<p />") << "\n"
end

def accept_block_quote block_quote
  @res << "\n<blockquote>"
  block_quote.parts.each do |part|
    part.accept self
  end
  @res << "</blockquote>\n"
end

def accept_heading heading
  level = [6, heading.level].min
  label = heading.label @code_object
  @res << if @options.output_decoration
            "\n<h#{level} id=\"#{label}\">"
          else
            "\n<h#{level}>"
          end
  @res << to_html(heading.text)
  unless @options.pipe then
    @res << "<span><a href=\"##{label}\">&para;</a>"
    @res << " <a href=\"#top\">&uarr;</a></span>"
  end
  @res << "</h#{level}>\n"
end

def accept_list_end(list)
  @list.pop
  if tag = @in_list_entry.pop
    @res << tag
  end
  @res << html_list_name(list.type, false) << "\n"
end

def accept_list_item_end(list_item)
  @in_list_entry[-1] = list_end_for(@list.last)
end

def accept_list_item_start(list_item)
  if tag = @in_list_entry.last
    @res << tag
  end
  @res << list_item_start(list_item, @list.last)
end

def accept_list_start(list)
  @list << list.type
  @res << html_list_name(list.type, true)
  @in_list_entry.push false
end

def accept_paragraph paragraph
  @res << "\n<p>"
  text = paragraph.text @hard_break
  text = text.gsub(/\r?\n/, ' ')
  @res << wrap(to_html(text))
  @res << "</p>\n"
end

def accept_raw raw
  @res << raw.parts.join("\n")
end

def accept_rule rule
  @res << "<hr>\n"
end

def accept_verbatim verbatim
  text = verbatim.text.rstrip
  klass = nil
  content = if verbatim.ruby? or parseable? text then
              begin
                tokens = RDoc::RubyLex.tokenize text, @options
                klass  = ' class="ruby"'
                RDoc::TokenStream.to_html tokens
              rescue RDoc::RubyLex::Error
                CGI.escapeHTML text
              end
            else
              CGI.escapeHTML text
            end
  if @options.pipe then
    @res << "\n<pre><code>#{CGI.escapeHTML text}</code></pre>\n"
  else
    @res << "\n<pre#{klass}>#{content}</pre>\n"
  end
end

def convert_string(text)
  CGI.escapeHTML text
end

def end_accepting
  @res.join
end

def gen_url url, text
  scheme, url, id = parse_url url
  if %w[http https link].include?(scheme) and
     url =~ /\.(gif|png|jpg|jpeg|bmp)$/ then
    "<img src=\"#{url}\" />"
  else
    text = text.sub %r%^#{scheme}:/*%i, ''
    text = text.sub %r%^[*\^](\d+)$%,   '\1'
    link = "<a#{id} href=\"#{url}\">#{text}</a>"
    link = "<sup>#{link}</sup>" if /"foot/ =~ id
    link
  end
end

def handle_RDOCLINK url # :nodoc:
  case url
  when /^rdoc-ref:/
    $'
  when /^rdoc-label:/
    text = $'
    text = case text
           when /\Alabel-/    then $'
           when /\Afootmark-/ then $'
           when /\Afoottext-/ then $'
           else                    text
           end
    gen_url url, text
  when /^rdoc-image:/
    "<img src=\"#{$'}\">"
  else
    url =~ /\Ardoc-[a-z]+:/
    $'
  end
end

def handle_special_HARD_BREAK special
  '<br>'
end

def handle_special_HYPERLINK(special)
  url = special.text
  gen_url url, url
end

def handle_special_RDOCLINK special
  handle_RDOCLINK special.text
end

def handle_special_TIDYLINK(special)
  text = special.text
  return text unless
    text =~ /^\{(.*)\}\[(.*?)\]$/ or text =~ /^(\S+)\[(.*?)\]$/
  label = $1
  url   = $2
  label = handle_RDOCLINK label if /^rdoc-image:/ =~ label
  gen_url url, label
end

def html_list_name(list_type, open_tag)
  tags = LIST_TYPE_TO_HTML[list_type]
  raise RDoc::Error, "Invalid list type: #{list_type.inspect}" unless tags
  tags[open_tag ? 0 : 1]
end

def init_tags
  add_tag :BOLD, "<strong>", "</strong>"
  add_tag :TT,   "<code>",   "</code>"
  add_tag :EM,   "<em>",     "</em>"
end

def initialize options, markup = nil
  super
  @code_object = nil
  @from_path = ''
  @in_list_entry = nil
  @list = nil
  @th = nil
  @hard_break = "<br>\n"
  # external links
  @markup.add_special(/(?:link:|https?:|mailto:|ftp:|irc:|www\.)\S+\w/,
                      :HYPERLINK)
  add_special_RDOCLINK
  add_special_TIDYLINK
  init_tags
end

def list_end_for(list_type)
  case list_type
  when :BULLET, :LALPHA, :NUMBER, :UALPHA then
    "</li>"
  when :LABEL, :NOTE then
    "</dd>"
  else
    raise RDoc::Error, "Invalid list type: #{list_type.inspect}"
  end
end

def list_item_start(list_item, list_type)
  case list_type
  when :BULLET, :LALPHA, :NUMBER, :UALPHA then
    "<li>"
  when :LABEL, :NOTE then
    Array(list_item.label).map do |label|
      "<dt>#{to_html label}\n"
    end.join << "<dd>"
  else
    raise RDoc::Error, "Invalid list type: #{list_type.inspect}"
  end
end

def parseable? text
  eval("BEGIN {return true}\n#{text}")
rescue SyntaxError
  false
end

def start_accepting
  @res = []
  @in_list_entry = []
  @list = []
end

def to_html item
  super convert_flow @am.flow item
end