Class: ReVIEW::EPUBMaker

Inherits:
Object show all
Includes:
EPUBMaker, REXML, MakerHelper
Defined in:
lib/review/epubmaker.rb,
lib/review/epubmaker/reviewheaderlistener.rb

Defined Under Namespace

Classes: ReVIEWHeaderListener

Instance Method Summary collapse

Methods included from MakerHelper

bindir, #cleanup_mathimg, copy_images_to_dir, #default_imgmath_preamble, #make_math_images, #make_math_images_dvipng, #make_math_images_pdfcrop

Constructor Details

#initialize ⇒ EPUBMaker

Returns a new instance of EPUBMaker.



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# File 'lib/review/epubmaker.rb', line 34

def initialize
  @producer = nil
  @htmltoc = nil
  @buildlogtxt = 'build-log.txt'
  @logger = ReVIEW.logger
end

Instance Method Details

#build_body(basetmpdir, yamlfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 260

def build_body(basetmpdir, yamlfile)
  @precount = 0
  @bodycount = 0
  @postcount = 0

  @manifeststr = ''
  @ncxstr = ''
  @tocdesc = []

  basedir = File.dirname(yamlfile)
  base_path = Pathname.new(basedir)
  book = ReVIEW::Book.load(basedir)
  book.config = @config
  @converter = ReVIEW::Converter.new(book, ReVIEW::HTMLBuilder.new)
  @compile_errors = nil

  book.parts.each do |part|
    if part.name.present?
      if part.file?
        build_chap(part, base_path, basetmpdir, true)
      else
        htmlfile = "part_#{part.number}.#{@config['htmlext']}"
        build_part(part, basetmpdir, htmlfile)
        title = ReVIEW::I18n.t('part', part.number)
        if part.name.strip.present?
          title += ReVIEW::I18n.t('chapter_postfix') + part.name.strip
        end
        @htmltoc.add_item(0, htmlfile, title, chaptype: 'part')
        write_buildlogtxt(basetmpdir, htmlfile, '')
      end
    end

    part.chapters.each do |chap|
      build_chap(chap, base_path, basetmpdir, false)
    end
  end
  check_compile_status
end

#build_chap(chap, base_path, basetmpdir, ispart) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 326

def build_chap(chap, base_path, basetmpdir, ispart)
  chaptype = 'body'
  if ispart
    chaptype = 'part'
  elsif chap.on_predef?
    chaptype = 'pre'
  elsif chap.on_appendix?
    chaptype = 'appendix'
  elsif chap.on_postdef?
    chaptype = 'post'
  end

  filename =
    if ispart.present?
      chap.path
    else
      Pathname.new(chap.path).relative_path_from(base_path).to_s
    end

  id = File.basename(filename).sub(/\.re\Z/, '')

  if @config['epubmaker']['rename_for_legacy'] && ispart.nil?
    if chap.on_predef?
      @precount += 1
      id = sprintf('pre%02d', @precount)
    elsif chap.on_appendix?
      @postcount += 1
      id = sprintf('post%02d', @postcount)
    else
      @bodycount += 1
      id = sprintf('chap%02d', @bodycount)
    end
  end

  htmlfile = "#{id}.#{@config['htmlext']}"
  write_buildlogtxt(basetmpdir, htmlfile, filename)
  log("Create #{htmlfile} from #{filename}.")

  if @config['params'].present?
    warn %Q('params:' in config.yml is obsoleted.)
    if @config['params'] =~ /stylesheet=/
      warn %Q(stylesheets should be defined in 'stylesheet:', not in 'params:')
    end
  end
  begin
    @converter.convert(filename, File.join(basetmpdir, htmlfile))
    write_info_body(basetmpdir, id, htmlfile, ispart, chaptype)
    remove_hidden_title(basetmpdir, htmlfile)
  rescue => e
    @compile_errors = true
    warn "compile error in #{filename} (#{e.class})"
    warn e.message
  end
end

#build_part(part, basetmpdir, htmlfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 299

def build_part(part, basetmpdir, htmlfile)
  log("Create #{htmlfile} from a template.")
  File.open(File.join(basetmpdir, htmlfile), 'w') do |f|
    @body = ''
    @body << %Q(<div class="part">\n)
    @body << %Q(<h1 class="part-number">#{CGI.escapeHTML(ReVIEW::I18n.t('part', part.number))}</h1>\n)
    if part.name.strip.present?
      @body << %Q(<h2 class="part-title">#{CGI.escapeHTML(part.name.strip)}</h2>\n)
    end
    @body << %Q(</div>\n)

    @language = @producer.config['language']
    @stylesheets = @producer.config['stylesheet']
    tmplfile = File.expand_path(template_name, ReVIEW::Template::TEMPLATE_DIR)
    tmpl = ReVIEW::Template.load(tmplfile)
    f.write tmpl.result(binding)
  end
end

#build_path ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 78

def build_path
  if @config['debug']
    path = File.expand_path("#{@config['bookname']}-epub", Dir.pwd)
    if File.exist?(path)
      FileUtils.rm_rf(path, secure: true)
    end
    Dir.mkdir(path)
    path
  else
    Dir.mktmpdir("#{@config['bookname']}-epub-")
  end
end

#build_titlepage(basetmpdir, htmlfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 511

def build_titlepage(basetmpdir, htmlfile)
  # TODO: should be created via epubcommon
  @title = CGI.escapeHTML(@config.name_of('booktitle'))
  File.open(File.join(basetmpdir, htmlfile), 'w') do |f|
    @body = ''
    @body << %Q(<div class="titlepage">\n)
    @body << %Q(<h1 class="tp-title">#{CGI.escapeHTML(@config.name_of('booktitle'))}</h1>\n)
    if @config['subtitle']
      @body << %Q(<h2 class="tp-subtitle">#{CGI.escapeHTML(@config.name_of('subtitle'))}</h2>\n)
    end
    if @config['aut']
      @body << %Q(<h2 class="tp-author">#{CGI.escapeHTML(@config.names_of('aut').join(ReVIEW::I18n.t('names_splitter')))}</h2>\n)
    end
    if @config['pbl']
      @body << %Q(<h3 class="tp-publisher">#{CGI.escapeHTML(@config.names_of('pbl').join(ReVIEW::I18n.t('names_splitter')))}</h3>\n)
    end
    @body << '</div>'

    @language = @producer.config['language']
    @stylesheets = @producer.config['stylesheet']
    tmplfile = File.expand_path(template_name, ReVIEW::Template::TEMPLATE_DIR)
    tmpl = ReVIEW::Template.load(tmplfile)
    f.write tmpl.result(binding)
  end
end

#call_hook(hook_name, *params) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 172

def call_hook(hook_name, *params)
  filename = @config['epubmaker'][hook_name]
  log("Call #{hook_name}. (#{filename})")
  if filename.present? && File.exist?(filename) && FileTest.executable?(filename)
    if ENV['REVIEW_SAFE_MODE'].to_i & 1 > 0
      warn 'hook is prohibited in safe mode. ignored.'
    else
      system(filename, *params)
    end
  end
end

#check_compile_status ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 253

def check_compile_status
  return unless @compile_errors

  $stderr.puts 'compile error, No EPUB file output.'
  exit 1
end

#check_image_size(basetmpdir, maxpixels, allow_exts = nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 590

def check_image_size(basetmpdir, maxpixels, allow_exts = nil)
  begin
    require 'image_size'
  rescue LoadError
    return nil
  end
  require 'find'
  allow_exts ||= @config['image_ext']

  pat = '\\.(' + allow_exts.delete_if { |t| %w[ttf woff otf].member?(t.downcase) }.join('|') + ')'
  extre = Regexp.new(pat, Regexp::IGNORECASE)
  Find.find(basetmpdir) do |fname|
    next unless fname.match(extre)
    img = ImageSize.path(fname)
    next if img.width.nil? || img.width * img.height <= maxpixels
    h = Math.sqrt(img.height * maxpixels / img.width)
    w = maxpixels / h
    fname.sub!("#{basetmpdir}/", '')
    warn "#{fname}: #{img.width}x#{img.height} exceeds a limit. suggeted value is #{w.to_i}x#{h.to_i}"
  end

  true
end

#copy_backmatter(basetmpdir) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 537

def copy_backmatter(basetmpdir)
  if @config['profile']
    FileUtils.cp(@config['profile'],
                 File.join(basetmpdir, File.basename(@config['profile'])))
    @htmltoc.add_item(1,
                      File.basename(@config['profile']),
                      @producer.res.v('profiletitle'),
                      chaptype: 'post')
  end

  if @config['advfile']
    FileUtils.cp(@config['advfile'],
                 File.join(basetmpdir, File.basename(@config['advfile'])))
    @htmltoc.add_item(1,
                      File.basename(@config['advfile']),
                      @producer.res.v('advtitle'),
                      chaptype: 'post')
  end

  if @config['colophon']
    if @config['colophon'].is_a?(String) # FIXME: should let obsolete this style?
      FileUtils.cp(@config['colophon'],
                   File.join(basetmpdir, "colophon.#{@config['htmlext']}"))
    else
      filename = File.join(basetmpdir, "colophon.#{@config['htmlext']}")
      File.open(filename, 'w') do |f|
        @producer.colophon(f)
      end
    end
    @htmltoc.add_item(1,
                      "colophon.#{@config['htmlext']}",
                      @producer.res.v('colophontitle'),
                      chaptype: 'post')
  end

  if @config['backcover']
    FileUtils.cp(@config['backcover'],
                 File.join(basetmpdir, File.basename(@config['backcover'])))
    @htmltoc.add_item(1,
                      File.basename(@config['backcover']),
                      @producer.res.v('backcovertitle'),
                      chaptype: 'post')
  end

  true
end

#copy_frontmatter(basetmpdir) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 471

def copy_frontmatter(basetmpdir)
  if @config['cover'].present? && File.exist?(@config['cover'])
    FileUtils.cp(@config['cover'],
                 File.join(basetmpdir, File.basename(@config['cover'])))
  end

  if @config['titlepage']
    if @config['titlefile'].nil?
      build_titlepage(basetmpdir, "titlepage.#{@config['htmlext']}")
    else
      FileUtils.cp(@config['titlefile'],
                   File.join(basetmpdir, "titlepage.#{@config['htmlext']}"))
    end
    @htmltoc.add_item(1,
                      "titlepage.#{@config['htmlext']}",
                      @producer.res.v('titlepagetitle'),
                      chaptype: 'pre')
  end

  if @config['originaltitlefile'].present? && File.exist?(@config['originaltitlefile'])
    FileUtils.cp(@config['originaltitlefile'],
                 File.join(basetmpdir, File.basename(@config['originaltitlefile'])))
    @htmltoc.add_item(1,
                      File.basename(@config['originaltitlefile']),
                      @producer.res.v('originaltitle'),
                      chaptype: 'pre')
  end

  if @config['creditfile'].present? && File.exist?(@config['creditfile'])
    FileUtils.cp(@config['creditfile'],
                 File.join(basetmpdir, File.basename(@config['creditfile'])))
    @htmltoc.add_item(1,
                      File.basename(@config['creditfile']),
                      @producer.res.v('credittitle'),
                      chaptype: 'pre')
  end

  true
end

#copy_images(resdir, destdir, allow_exts = nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 209

def copy_images(resdir, destdir, allow_exts = nil)
  return nil unless File.exist?(resdir)
  allow_exts ||= @config['image_ext']
  FileUtils.mkdir_p(destdir)
  if @config['epubmaker']['verify_target_images'].present?
    @config['epubmaker']['force_include_images'].each do |file|
      unless File.exist?(file)
        if file !~ /\Ahttp[s]?:/
          warn "#{file} is not found, skip."
        end
        next
      end
      basedir = File.dirname(file)
      FileUtils.mkdir_p(File.join(destdir, basedir))
      log("Copy #{file} to the temporary directory.")
      FileUtils.cp(file, File.join(destdir, basedir))
    end
  else
    recursive_copy_files(resdir, destdir, allow_exts)
  end
end

#copy_resources(resdir, destdir, allow_exts = nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 231

def copy_resources(resdir, destdir, allow_exts = nil)
  return nil unless File.exist?(resdir)
  allow_exts ||= @config['image_ext']
  FileUtils.mkdir_p(destdir)
  recursive_copy_files(resdir, destdir, allow_exts)
end

#copy_stylesheet(basetmpdir) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 463

def copy_stylesheet(basetmpdir)
  return if @config['stylesheet'].empty?
  @config['stylesheet'].each do |sfile|
    FileUtils.cp(sfile, basetmpdir)
    @producer.contents.push(Content.new('file' => sfile))
  end
end

#detect_properties(path) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 392

def detect_properties(path)
  properties = []
  File.open(path) do |f|
    doc = REXML::Document.new(f)
    if REXML::XPath.first(doc, '//m:math', 'm' => 'http://www.w3.org/1998/Math/MathML')
      properties << 'mathml'
    end
    if REXML::XPath.first(doc, '//s:svg', 's' => 'http://www.w3.org/2000/svg')
      properties << 'svg'
    end
  end
  properties
end

#error(msg) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 41

def error(msg)
  @logger.error "#{File.basename($PROGRAM_NAME, '.*')}: #{msg}"
  exit 1
end

#load_yaml(yamlfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 54

def load_yaml(yamlfile)
  loader = ReVIEW::YAMLLoader.new
  @config = ReVIEW::Configure.values
  begin
    @config.deep_merge!(loader.load_file(yamlfile))
  rescue => e
    error "yaml error #{e.message}"
  end

  @producer = Producer.new(@config)
  @producer.load(yamlfile)
  @config = @producer.config
  @config.maker = 'epubmaker'
  update_log_level
end

#log(msg) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 50

def log(msg)
  @logger.debug(msg)
end

#produce(yamlfile, bookname = nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 91

def produce(yamlfile, bookname = nil)
  load_yaml(yamlfile)
  I18n.setup(@config['language'])
  bookname ||= @config['bookname']
  booktmpname = "#{bookname}-epub"

  begin
    @config.check_version(ReVIEW::VERSION)
  rescue ReVIEW::ConfigError => e
    warn e.message
  end
  log("Loaded yaml file (#{yamlfile}). I will produce #{bookname}.epub.")

  FileUtils.rm_f("#{bookname}.epub")
  if @config['debug']
    FileUtils.rm_rf(booktmpname)
  end

  cleanup_mathimg

  basetmpdir = build_path
  begin
    log("Created first temporary directory as #{basetmpdir}.")

    call_hook('hook_beforeprocess', basetmpdir)

    @htmltoc = ReVIEW::HTMLToc.new(basetmpdir)
    ## copy all files into basetmpdir
    copy_stylesheet(basetmpdir)

    copy_frontmatter(basetmpdir)
    call_hook('hook_afterfrontmatter', basetmpdir)

    build_body(basetmpdir, yamlfile)
    call_hook('hook_afterbody', basetmpdir)

    copy_backmatter(basetmpdir)

    math_dir = "./#{@config['imagedir']}/_review_math"
    if @config['imgmath'] && File.exist?(File.join(math_dir, '__IMGMATH_BODY__.tex'))
      make_math_images(math_dir)
    end
    call_hook('hook_afterbackmatter', basetmpdir)

    ## push contents in basetmpdir into @producer
    push_contents(basetmpdir)

    if @config['epubmaker']['verify_target_images'].present?
      verify_target_images(basetmpdir)
      copy_images(@config['imagedir'], basetmpdir)
    else
      copy_images(@config['imagedir'], File.join(basetmpdir, @config['imagedir']))
    end

    copy_resources('covers', File.join(basetmpdir, @config['imagedir']))
    copy_resources('adv', File.join(basetmpdir, @config['imagedir']))
    copy_resources(@config['fontdir'], File.join(basetmpdir, 'fonts'), @config['font_ext'])

    call_hook('hook_aftercopyimage', basetmpdir)

    @producer.import_imageinfo(File.join(basetmpdir, @config['imagedir']), basetmpdir)
    @producer.import_imageinfo(File.join(basetmpdir, 'fonts'), basetmpdir, @config['font_ext'])

    check_image_size(basetmpdir, @config['image_maxpixels'], @config['image_ext'])

    epubtmpdir = nil
    if @config['debug'].present?
      epubtmpdir = File.join(basetmpdir, booktmpname)
      Dir.mkdir(epubtmpdir)
    end
    log('Call ePUB producer.')
    @producer.produce("#{bookname}.epub", basetmpdir, epubtmpdir)
    log('Finished.')
  rescue ApplicationError => e
    raise if @config['debug']
    error(e.message)
  ensure
    FileUtils.remove_entry_secure(basetmpdir) unless @config['debug']
  end
end

#push_contents(_basetmpdir) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 441

def push_contents(_basetmpdir)
  @htmltoc.each_item do |level, file, title, args|
    next if level.to_i > @config['toclevel'] && args[:force_include].nil?
    log("Push #{file} to ePUB contents.")

    hash = { 'file' => file,
             'level' => level.to_i,
             'title' => title,
             'chaptype' => args[:chaptype] }
    if args[:id].present?
      hash['id'] = args[:id]
    end
    if args[:properties].present?
      hash['properties'] = args[:properties].split(' ')
    end
    if args[:notoc].present?
      hash['notoc'] = args[:notoc]
    end
    @producer.contents.push(Content.new(hash))
  end
end

#recursive_copy_files(resdir, destdir, allow_exts) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 238

def recursive_copy_files(resdir, destdir, allow_exts)
  Dir.open(resdir) do |dir|
    dir.each do |fname|
      next if fname.start_with?('.')
      if FileTest.directory?(File.join(resdir, fname))
        recursive_copy_files(File.join(resdir, fname), File.join(destdir, fname), allow_exts)
      elsif fname =~ /\.(#{allow_exts.join('|')})\Z/i
        FileUtils.mkdir_p(destdir)
        log("Copy #{resdir}/#{fname} to the temporary directory.")
        FileUtils.cp(File.join(resdir, fname), destdir)
      end
    end
  end
end

#remove_hidden_title(basetmpdir, htmlfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 381

def remove_hidden_title(basetmpdir, htmlfile)
  File.open(File.join(basetmpdir, htmlfile), 'r+') do |f|
    body = f.read.
           gsub(%r{<h\d .*?hidden=['"]true['"].*?>.*?</h\d>\n}, '').
           gsub(%r{(<h\d .*?)\s*notoc=['"]true['"]\s*(.*?>.*?</h\d>\n)}, '\1\2')
    f.rewind
    f.print body
    f.truncate(f.tell)
  end
end

#template_name ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 318

def template_name
  if @producer.config['htmlversion'].to_i == 5
    './html/layout-html5.html.erb'
  else
    './html/layout-xhtml1.html.erb'
  end
end

#update_log_level ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 70

def update_log_level
  if @config['debug']
    @logger.level = Logger::DEBUG
  else
    @logger.level = Logger::INFO
  end
end

#verify_target_images(basetmpdir) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 184

def verify_target_images(basetmpdir)
  @producer.contents.each do |content|
    case content.media
    when 'application/xhtml+xml'
      File.open("#{basetmpdir}/#{content.file}") do |f|
        Document.new(File.new(f)).each_element('//img') do |e|
          @config['epubmaker']['force_include_images'].push(e.attributes['src'])
          if e.attributes['src'] =~ /svg\Z/i
            content.properties.push('svg')
          end
        end
      end
    when 'text/css'
      File.open(File.join(basetmpdir, content.file)) do |f|
        f.each_line do |l|
          l.scan(/url\((.+?)\)/) do |_m|
            @config['epubmaker']['force_include_images'].push($1.strip)
          end
        end
      end
    end
  end
  @config['epubmaker']['force_include_images'] = @config['epubmaker']['force_include_images'].compact.sort.uniq
end

#warn(msg) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 46

def warn(msg)
  @logger.warn "#{File.basename($PROGRAM_NAME, '.*')}: #{msg}"
end

#write_buildlogtxt(basetmpdir, htmlfile, reviewfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 584

def write_buildlogtxt(basetmpdir, htmlfile, reviewfile)
  File.open(File.join(basetmpdir, @buildlogtxt), 'a') do |f|
    f.puts "#{htmlfile},#{reviewfile}"
  end
end

#write_info_body(basetmpdir, _id, filename, ispart = nil, chaptype = nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 406

def write_info_body(basetmpdir, _id, filename, ispart = nil, chaptype = nil)
  headlines = []
  path = File.join(basetmpdir, filename)
  htmlio = File.new(path)
  Document.parse_stream(htmlio, ReVIEWHeaderListener.new(headlines))
  properties = detect_properties(path)
  if properties.present?
    prop_str = ',properties=' + properties.join(' ')
  else
    prop_str = ''
  end
  first = true
  headlines.each do |headline|
    if ispart.present? && headline['level'] == 1
      headline['level'] = 0
    end
    if first.nil?
      @htmltoc.add_item(headline['level'],
                        filename + '#' + headline['id'],
                        headline['title'],
                        { chaptype: chaptype,
                          notoc: headline['notoc'] })
    else
      @htmltoc.add_item(headline['level'],
                        filename,
                        headline['title'],
                        { force_include: true,
                          chaptype: chaptype + prop_str,
                          notoc: headline['notoc'] })
      first = nil
    end
  end
  htmlio.close
end