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Dir : ~/opt/alt/ruby23/lib64/ruby/2.3.0/rdoc/markup/

Edit File: to_html.rb

# frozen_string_literal: false
require 'cgi'

##
# Outputs RDoc markup as HTML.

class RDoc::Markup::ToHtml < RDoc::Markup::Formatter

include RDoc::Text

# :section: Utilities

##
  # Maps RDoc::Markup::Parser::LIST_TOKENS types to HTML tags

LIST_TYPE_TO_HTML = {
 :BULLET => ['<ul>', '</ul>'],
 :LABEL => ['<dl class="rdoc-list label-list">', '</dl>'],
 :LALPHA => ['<ol style="list-style-type: lower-alpha">', '</ol>'],
 :NOTE => ['<dl class="rdoc-list note-list">', '</dl>'],
 :NUMBER => ['<ol>', '</ol>'],
 :UALPHA => ['<ol style="list-style-type: upper-alpha">', '</ol>'],
 }

attr_reader :res # :nodoc:
  attr_reader :in_list_entry # :nodoc:
  attr_reader :list # :nodoc:

##
  # The RDoc::CodeObject HTML is being generated for.  This is used to
  # generate namespaced URI fragments

attr_accessor :code_object

##
  # Path to this document for relative links

attr_accessor :from_path

# :section:

##
  # Creates a new formatter that will output HTML

def initialize options, markup = nil
    super

@code_object = nil
 @from_path = ''
 @in_list_entry = nil
 @list = nil
 @th = nil
 @hard_break = " \n"

add_special_RDOCLINK
    add_special_TIDYLINK

init_tags
  end

# :section: Special Handling
  #
  # These methods handle special markup added by RDoc::Markup#add_special.

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

##
 # +special+ is a <code> </code>

def handle_special_HARD_BREAK special
 ' '
 end

##
 # +special+ is a potential link. The following schemes are handled:
 #
 # <tt>mailto:</tt>::
 # Inserted as-is.
 # <tt>http:</tt>::
 # Links are checked to see if they reference an image. If so, that image
 # gets inserted using an <tt><img></tt> tag. Otherwise a conventional
 # <tt><a href></tt> is used.
 # <tt>link:</tt>::
 # Reference to a local file relative to the output directory.

def handle_special_HYPERLINK(special)
    url = special.text

gen_url url, url
  end

##
  # +special+ is an rdoc-schemed link that will be converted into a hyperlink.
  #
  # For the +rdoc-ref+ scheme the named reference will be returned without
  # creating a link.
  #
  # For the +rdoc-label+ scheme the footnote and label prefixes are stripped
  # when creating a link.  All other contents will be linked verbatim.

def handle_special_RDOCLINK special
    handle_RDOCLINK special.text
  end

##
 # This +special+ is a link where the label is different from the URL
 # <tt>label[url]</tt> or <tt>{long label}[url]</tt>

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

# :section: Visitor
  #
  # These methods implement the HTML visitor.

##
  # Prepares the visitor for HTML generation

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

##
  # Returns the generated output

def end_accepting
    @res.join
  end

##
  # Adds +block_quote+ to the output

def accept_block_quote block_quote
 @res << "\n<blockquote>"

block_quote.parts.each do |part|
      part.accept self
    end

@res << "</blockquote>\n"
 end

##
  # Adds +paragraph+ to the output

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

##
  # Adds +verbatim+ to the output

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

##
  # Adds +rule+ to the output

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

##
  # Prepares the visitor for consuming +list+

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

##
  # Finishes consumption of +list+

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

##
  # Prepares the visitor for consuming +list_item+

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

##
  # Finishes consumption of +list_item+

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

##
  # Adds +blank_line+ to the output

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

##
  # Adds +heading+ to the output.  The headings greater than 6 are trimmed to
  # level 6.

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 << "<a href=\"##{label}\">¶</a>"
 @res << " <a href=\"#top\">↑</a>"
 end
 @res << "</h#{level}>\n"
 end

##
  # Adds +raw+ to the output

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

# :section: Utilities

##
  # CGI-escapes +text+

def convert_string(text)
    CGI.escapeHTML text
  end

##
  # Generate a link to +url+ with content +text+.  Handles the special cases
  # for img: and link: described under handle_special_HYPERLINK

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 = "#{link}" if /"foot/ =~ id

link
    end
  end

##
  # Determines the HTML list element for +list_type+ and +open_tag+

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

##
  # Maps attributes to HTML tags

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

##
  # Returns the HTML tag for +list_type+, possible using a label from
  # +list_item+

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

##
  # Returns the HTML end-tag for +list_type+

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

##
  # Returns true if text is valid ruby syntax

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

##
  # Converts +item+ to HTML using RDoc::Text#to_html

def to_html item
    super convert_flow @am.flow item
  end

end