-*- mode: org -*-
#+TITLE:       sisu src
#+DESCRIPTION: documents - structuring, various output representations & search
#+FILETAGS:    :sisu:src:
#+AUTHOR:      Ralph Amissah
#+EMAIL:       [[mailto:ralph.amissah@gmail.com][ralph.amissah@gmail.com]]
#+COPYRIGHT:   Copyright (C) 2015 - 2021 Ralph Amissah
#+LANGUAGE:    en
#+STARTUP:     content hideblocks hidestars noindent entitiespretty
#+OPTIONS:     H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
#+PROPERTY:    header-args  :exports code
#+PROPERTY:    header-args+ :noweb yes
#+PROPERTY:    header-args+ :eval no
#+PROPERTY:    header-args+ :results no
#+PROPERTY:    header-args+ :cache no
#+PROPERTY:    header-args+ :padline no
#+PROPERTY:    header-args+ :mkdirp yes

* src_sisupod_make.rb

#+HEADER: :tangle "../lib/sisu/src_sisupod_make.rb"
#+BEGIN_SRC ruby
#<<sisu_document_header>>
module SiSU_Doc
  require_relative 'src_shared'                         # scr_shared.rb
    include SiSU_Source
  require_relative 'se'                                 # se.rb
    include SiSU_Env
  class Source < SiSU_Source::SiSUpodSource
    require_relative 'utils_response'                   # utils_response.rb
    def initialize(opt,build=nil,place=nil)
      super(opt,build,place)
      @zipfile=@opt.fno.gsub(/(?:\~\S{2,3})?(\.ss[tm])$/,'\1')
      unless @opt.act[:quiet][:set]==:on
        pthinfo="#{@file.output_path.sisupod.dir}/#{@zipfile}.txz"
        (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        ? SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'Assemble source for sisu document',
            "#{@opt.fns} -> file://#{pthinfo}"
          ).cyan_hi_blue
        : SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'Assemble source for sisu document',
            pthinfo
          ).cyan_title_hi
      end
    end
    def sisupod_tar_xz
      begin
        FileUtils::mkdir_p(@file.output_path.sisupod.dir) \
          unless FileTest.directory?(@file.output_path.sisupod.dir)
        tree=((@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        && SiSU_Env::SystemCall.new.program_found?('tree')) \
        ? 'tree sisupod'
        : ''
        if FileTest.directory?(@path_pod[:fnb])
          Dir.chdir(@path_pod[:fnb])
          system(%{
            #{tree}
            tar -cJf #{@zipfile}.txz sisupod
            #echo "#{@file.place_file.sisupod.dir}"
          })
          FileUtils::mv("#{@zipfile}.txz",@file.place_file.sisupod.dir)
          Dir.chdir(@env.path.pwd)
          if (@opt.act[:verbose][:set]==:on \
          || @opt.act[:verbose_plus][:set]==:on \
          || @opt.act[:maintenance][:set]==:on)
            SiSU_Screen::Ansi.new('',"#{@opt.fns}.txz").blue_tab
          end
        else
          if (@opt.act[:verbose][:set]==:on \
          || @opt.act[:verbose_plus][:set]==:on \
          || @opt.act[:maintenance][:set]==:on)
            SiSU_Screen::Ansi.new('',"#{@opt.fns}.txz not built").blue_tab
          end
        end
      rescue
      ensure
      end
    end
  end
end
__END__
question?:                   should you permit the packing of multiple documents in single .xz ?

  open @opt.fns, parse file
    extract from file content:
      images and copy each image from whatever image source to _sisu/sisupod/sisu/_sisu/image

   remove previously existing contents of _/sisu/sisupod &
   make directory structure:

v3 -->
   _sisu
     sisupod
       doc
         manifest.txt
         en/content.sst                [file content]
         fr/content.sst
         _sisu
           conf
           image (ln -s ../../image)
           audio (ln -s ../../audio)
           video (ln -s ../../video)
       image                           [all images for specific document gathered here]
       audio
       video

v2 -->
   _sisu
     sisupod
       content.sst                     [file content]
       filename.sst                    [link to content.sst]
       _sisu/
         image/                        [all images for specific document gathered here]

sisu
  _sisu
    sisurc.yml
    convert/
    standard_terms/
    image
    processing
      ao/
      tex/
      texinfo/
      tune/
    sisupod

special case

composite file (master), e.g.
SiSU.ssm
#+END_SRC

* src_sisupod_sstm.rb

#+HEADER: :tangle "../lib/sisu/src_sisupod_sstm.rb"
#+BEGIN_SRC ruby
#<<sisu_document_header>>
module SiSU_Markup
  require_relative 'src_shared'                         # src_shared.rb
    include SiSU_Source
  require_relative 'se'                                 # se.rb
    include SiSU_Env
  class Source_Sisupod < SiSU_Source::SiSUpodSource
    def initialize(opt,build=nil,place=nil)
      super(opt,build,place)
      @opt=opt
    end
    def read
      unless @opt.act[:quiet][:set]==:on
        (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        ? SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'Share document markup text source',
            @opt.fns
          ).cyan_hi_blue
        : SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'Share document markup text source',
            @opt.fns
          ).cyan_title_hi
      end
      if FileTest.directory?(@path_pod[:fnb])
        FileUtils::mkdir_p(@file.output_path.src.dir) \
          unless FileTest.directory?(@file.output_path.src.dir)
        v=(@opt.act[:maintenance][:set]==:on) \
        ? 'v' : ''
        system(%{
          rsync -a#{v} #{@path_pod[:fnb]} #{@file.output_path.sisupod.dir}
          chbk=`pwd`
          cd #{@file.output_path.sisupod.dir}
          for I in `find -type d` ; do chmod 755 $I ; done
          for I in `find -type f` ; do chmod 644 $I ; done
          cd ${chbk}
        })
      else
        if (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on)
          SiSU_Screen::Ansi.new(
            '',
            "#{@opt.fno} not available"
          ).blue_tab
        end
      end
    end
  end
end
__END__
#+END_SRC

* src_kdissert_share.rb

#+HEADER: :tangle "../lib/sisu/src_kdissert_share.rb"
#+BEGIN_SRC ruby
#<<sisu_document_header>>
module SiSU_KdiSource
  require_relative 'se'                                 # se.rb
    include SiSU_Env
  class Source
    begin
      require 'fileutils'
        include FileUtils
    rescue LoadError
      SiSU_Utils::CodeMarker.new(__LINE__,__FILE__,:fuchsia).
        error('fileutils NOT FOUND (LoadError)')
    end
    def initialize(opt)
      @opt=opt
      @env=SiSU_Env::InfoEnv.new(@opt.fns)
      @output_path="#{@env.path.output}/#{@opt.fnb}"
    end
    def read
      SiSU_Screen::Ansi.new(
        @opt.act[:color_state][:set],
        'Share Kdissert Source Document!',
        @opt.fnb
      ).green_hi_blue unless @opt.act[:quiet][:set]==:on
      SiSU_Screen::Ansi.new(
        @opt.act[:color_state][:set],
        "Copy kdissert file to output directory",
        "#{@opt.fnb} -> #{@output_path}"
      ).warn unless @opt.act[:quiet][:set]==:on
      FileUtils::mkdir_p(@env.path.output) unless FileTest.directory?(@env.path.output)
      FileUtils::mkdir_p(@output_path) unless FileTest.directory?(@output_path)
      if FileTest.directory?(@output_path)
        if @opt.fns =~/\.kdi\._sst$/ \
        and FileTest.file?(@opt.fnb)
          FileUtils::cp(@opt.fnb,@output_path)
        end
      else
        SiSU_Screen::Ansi.new(
          @opt.act[:color_state][:set],
          "Output directory does not exist",
          "#{@opt.fnb} -> #{@output_path}"
        ).warn unless @opt.act[:quiet][:set]==:on
        exit
      end
    end
  end
end
__END__
#+END_SRC

* src_po4a_share.rb

#+HEADER: :tangle "../lib/sisu/src_po4a_share.rb"
#+BEGIN_SRC ruby
#<<sisu_document_header>>
module SiSU_Languages_Selected
  require_relative 'utils_response'                   # utils_response.rb
  def language
    def sisu_languages_available
      Px[:lng_lst]
    end
    def source_language_selected_str
      @opt.act[:po4a_lang][:src] \
      ? @opt.act[:po4a_lang][:src]
      : 'en'
    end
    def translation_languages_selected
      @opt.act[:po4a_lang][:trn] \
      ? @opt.act[:po4a_lang][:trn]
      : []
    end
    def translation_languages_available
      sisu_languages_available - [source_language_selected_str]
    end
    def translation_languages_selected_that_are_available
      translation_languages_selected & sisu_languages_available
    end
    def translation_languages_selected_that_are_available_str
      translation_languages_selected_that_are_available.join(' ')
    end
    def translation_languages_selected_str
      @opt.act[:po4a_lang][:trn].join(' ')
    end
    self
  end
end
module SiSU_Po4a_Project
  class Po4aCfg
    include SiSU_Composite_Doc_Utils                    # composite doc, .ssm, extract all related insert files, array of filenames test
    include SiSU_Response
    include SiSU_Languages_Selected
    def initialize(opt,file)
      @opt,@file=opt,file
    end
    def song
      if @opt.lng==language.source_language_selected_str
        ans=response?('po4a config file')
        if ans
          po4a_cfg
        end
      end
    end
    def po4a_cfg_filename
      'po4a.cfg'
    end
    def dir
      def pwd
        Dir.pwd
      end
      def po4a_
        'po4a/' # ''
      end
      def pot
        #po4a_ + 'pot'
        'pot'
      end
      def po
        #po4a_ + 'po'
        'po'
      end
      self
    end
    def po4a_cfg_file
      File.open("#{Dir.pwd}/#{po4a_cfg_filename}",'w')
    end
    def po4a_cfg
      lng=language.source_language_selected_str
      doc_import_list=composite_and_imported_filenames_array(@opt.fno)
      po4a_cfg_arr=[]
      po4a_cfg_arr \
        << "[po4a_langs] #{language.translation_languages_selected_that_are_available_str}"
      po4a_cfg_arr \
        << "[po4a_paths] #{dir.pot}/$master.pot $lang:#{dir.po}/$lang/$master.po"
      doc_import_list.each do |file_src|
        file_src_fn=
          file_src.gsub(/#{language.source_language_selected_str}\//,'')
        po4a_cfg_arr \
          << "[type: text] #{lng}/#{file_src} $lang:$lang/#{file_src_fn}"
      end
      file=@file.write_file.po4a_cfg
      po4a_cfg_arr.each do |txt|
      puts txt
        file << txt << "\n"
      end
      file.close
    end
  end
  class Po4aProject
    include SiSU_Languages_Selected
    include SiSU_Response
    def initialize(opt,file)
      @opt,@file=opt,file
    end
    def song
      make_paths
      if FileTest.directory?(@file.output_path.po4a.dir)
        Dir.chdir(@file.output_path.po4a.dir)
        dirs=Dir['*/']
        dirs_language=[]
        dirs.each do |x|
          dirs_language << x.gsub(/\/$/,'')
        end
        dirs_translation = \
          (language.translation_languages_available & dirs_language)
      end
      if (language.translation_languages_available & [@opt.lng]).length == 1
        puts %{gettext for: #{dirs_translation}
in #{Dir.pwd}}
        ans=response?('gettext?')
        if ans
          gettext_if_any_build_src_trans_po
        end
      end
      ans=response?('build project?')
      if ans
        build_src_master_to_pot_and_po_and_srcs
      end
    end
    def flags
      def debug
        '-d -v'
      end
      def normal
        ''
      end
      def quiet
        '-q'
      end
      self
    end
    def build_src_master_to_pot_and_po_and_srcs
      if SiSU_Sys_Call::SystemCall.new.po4a
        pwd=Dir.pwd
        #cmd='po4a --keep 0 -M UTF-8 --no-backups ' \
        #+ '--package-name ' \
        #+ 'sisu-manual' + ' ' \
        #+ flags.normal + ' ' \
        #+ filename.po4a_cfg
        cmd='po4a --keep 0 -M UTF-8' \
        + flags.normal + ' ' \
        + @file.base_filename.po4a_cfg
        Dir.chdir(@file.output_path.po4a.dir)
        system("
          cd #{@file.output_path.po4a.dir}
          #{cmd}
          cd -
        "); puts cmd
        Dir.chdir(pwd)
      end
    end
    def gettext_if_any_build_src_trans_po
        Dir.chdir(@file.output_path.po4a.dir)
        dirs=Dir['*/']
        dirs_language=[]
        dirs.each do |x|
          dirs_language << x.gsub(/\/$/,'')
        end
        dirs_translation = \
          (language.translation_languages_available & dirs_language)
        files_src=Dir.glob("./#{source_language_selected_str}/*.ss[tmi]")
        dirs_translation.each do |lng|
          files_src.each do |file|
            fn=file.gsub(/\.\/#{source_language_selected_str}\//,'')
            system("
              po4a-gettextize -f text -M utf-8 \
              -m ./#{source_language_selected_str}/#{fn} \
              -l ./#{lng}/#{fn} \
              -p ./po/#{lng}/#{fn}.po
            ")
            puts fn
          end
        end
    end
    def dir_mk(dir)
      unless FileTest.directory?(dir)
        FileUtils::mkdir_p(dir)
      end
    end
    def make_paths
      dir_mk(@file.output_path.pot.dir)
      dir_mk(@file.output_path.po.dir)
    end
    def clean
      #rm -f po/*/*.po~
      #rm -rf ../build
      FileUtils.rm_f Dir.glob("./#{dir.po}/*/*.po~")
    end
    def distclean
      #rm -f po4a.cfg
      #rm -rf $(LANGUAGES)
      FileUtils::rm_f(filename.po4a_cfg)
      FileUtils::rm_r(language.possible_translations,:force => true)
      #FileUtils::rm_r(language.translation_languages_selected_that_are_available,:force => true)
    end
  end
  class Po4aDistClean
    include SiSU_Languages_Selected
    include SiSU_Response
    def initialize(opt,file)
      @opt,@file=opt,file
    end
    def song
      pwd=Dir.pwd
      if FileTest.directory?(@file.output_path.po4a.dir)
        Dir.chdir(@file.output_path.po4a.dir)
        dirs=Dir['*/']
        dirs_language=[]
        dirs.each do |x|
          dirs_language << x.gsub(/\/$/,'')
        end
        dirs_translation = \
          (language.translation_languages_available & dirs_language)
        if dirs_translation.length > 0
          puts %{remove language translation directorie(s): #{dirs_translation}
in #{Dir  .pwd}}
          ans=response?('disclean?')
          if ans
            FileUtils::rm_f(@file.base_filename.po4a_cfg)
            FileUtils::rm_r(dirs_translation,:force => true)
            #FileUtils::rm_r(language.translation_languages_available,:force => true)
          end
        end
        Dir.chdir(pwd)
      end
    end
  end
end
#end
__END__
REMOVE
&#033;\|&#035;\|&&#042;\|&#045;\|&#047;\|&#095;\|&#123;\|&#125;\|&#126;\|&#

tables are problematic, difficult to reconstitute instruction, check

metadata, move to top? and work on

footnotes, different types, asterisk, also do you want to have separate
paragraphs, or breaks within one block?

where no ocn appropriately use ~# or -# or indeed 1~name-

comments in document, what to do about them, not sure they are currently
retained in dal, could be quite valuable to keep

Translate Shell
http://www.soimort.org/translate-shell/
translate.google.com
#+END_SRC

* src_po4a_shelf.rb

#+HEADER: :tangle "../lib/sisu/src_po4a_shelf.rb"
#+BEGIN_SRC ruby
#<<sisu_document_header>>
module SiSU_Po4a
  require_relative 'ao'                                 # ao.rb
  require_relative 'se'                                 # se.rb
    include SiSU_Env
  require_relative 'ao_composite'                       # ao_composite.rb
  require_relative 'shared_metadata'                    # shared_metadata.rb
  require_relative 'src_po4a_shelf_set'                 # src_po4a_shelf_set.rb
  include SiSU_Param
  require_relative 'object_munge'                       # object_munge.rb
  require_relative 'utils_composite'                    # utils_composite.rb
  class Source
    include SiSU_Object_Munge
    @@opt_src,@@opt_trn,@@opt_src_,@@opt_trn_,@@md_src,@@md_trn=
          nil,      nil,       nil,       nil,     nil,     nil
    @@auto_translation_ = :go
    def initialize(opt,fn=nil)
      @opt,@fn=opt,fn
      #unless @opt.fns =~/(.+?\.(?:-|ssm\.)?sst)$/
      #  puts "#{@opt.fns} not a processed file type"
      #end
      file_arr=SiSU_Info_Env::InfoEnv.new.source_file_processing_array(@opt.fns)
      SiSU_Param::Parameters::Instructions.new(file_arr,@opt).extract
      r=Px[:lng_lst_rgx].gsub(/\|en\|/,'|')
      @lang_regx=%r{(?:#{r})}
      if opt.fns =~/\S+?~#{@lang_regx}\.ss[mti]/ \
      and opt.f_pth[:lng]!=@opt.lng_base
        @@opt_src_=false
        @@opt_trn=opt
        @@md_trn=SiSU_Param::Parameters.new(opt).get
      else
        @@opt_src_=true
        @@opt_src=opt
        @@md_src=SiSU_Param::Parameters.new(opt).get
      end
    end
    def wrap_width_set(md,env)
      if defined? md.make.plaintext_wrap \
      and md.make.plaintext_wrap
        md.make.plaintext_wrap
      elsif defined? env.plaintext_wrap \
      and env.plaintext_wrap
        env.plaintext_wrap
      else 78
      end
    end
    def process_file(md,env,file,wrap_width,fn)
      unless @opt.act[:quiet][:set]==:on
        tool=(@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        ? "#{env.program.text_editor} #{file.output_path.pot.dir}/"
        : @opt.fns
        (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        ? SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'Pot po4a',
            tool
          ).green_hi_blue
        : SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'Pot po4a',
            tool
          ).green_title_hi
        if (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on)
          SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            @opt.fns,
            file.output_path.pot.dir
          ).flow
        end
      end
      if @opt.fns =~/\S+?~#{@lang_regx}\.ss[mti]/ \
      or @opt.f_pth[:lng] !=@opt.lng_base
        opt_lang_trn_fn=fn
        @ao_arr_lang_trans=
          SiSU_AO::Source.new(@opt,opt_lang_trn_fn,:po4a).get # ao file drawn here
        opt_lang_src_fn=(fn =~/\S+?~\S{2}(?:_\S{2})?\.ss[mti]/) \
        ? (fn.gsub(/(\S+?)~\S{2}(?:_\S{2})?(\.ss[mti])/,'\1\2')) #check i
        : fn
        transdir,srcdir=Dir.pwd,Dir.pwd
        if Dir.pwd.to_s =~/\/#{@lang_regx}$/
          transdir=Dir.pwd
          srcdir=transdir.
            gsub(/\/#{@lang_regx}$/,
              "/#{@opt.lng_base}")
          if FileTest.directory?(srcdir)
            Dir.chdir(srcdir)
          end
        else nil
        end
        if FileTest.file?("#{srcdir}/#{opt_lang_src_fn}")
          @ao_arr_lang_src=
            SiSU_AO::Source.new(
              @@opt_src,
              opt_lang_src_fn,
              :po4a
            ).get # ao file drawn here
        else
          puts "no identified source document"
          exit
        end
        Dir.chdir(transdir) if transdir
      else
        @ao_arr_lang_src=
          SiSU_AO::Source.new(
            @opt,
            fn,
            :po4a
          ).get # ao file drawn here
        @ao_arr_lang_trans=nil
      end
      SiSU_Po4a::Source::Scroll.new(
        fn,
        @ao_arr_lang_src,
        @ao_arr_lang_trans,
        @@md_src,
        @@md_trn,
        wrap_width
      ).songsheet
    end
    def read
      begin
        src={}
        src[:pth]=@opt.f_pth[:pth]
        src[:files]=if @opt.fns =~ /\.(?:(?:-|ssm\.)sst|ssm)$/
          @opt.fns=@opt.fns.gsub(/\.ssm\.sst$/,'.ssm')
          SiSU_Assemble::CompositeFileList.new(@opt).read
        else
          [@opt.fns]
        end
        md=SiSU_Param::Parameters.new(@opt).get
        env=SiSU_Env::InfoEnv.new(@opt.fns)
        file=SiSU_Env::FileOp.new(md)
        Po4aCfg.new(@opt,file).po4a_cfg
        wrap_width=wrap_width_set(md,env)
        src[:files].each do |fn|
          process_file(md,env,file,wrap_width,fn)
        end
      rescue
        SiSU_Errors::Rescued.new($!,$@,@opt.selections.str,@opt.fns).location do
          __LINE__.to_s + ':' + __FILE__
        end
      ensure
      end
    end
    private
    class Scroll <Source
      include SiSU_Po4aUtils
      @@endnotes={ para: [], end: [] }
      def initialize(fn,data_src,data_trn,md_src,md_trn,wrap_width)
        @fn,@data_src,@data_trn,@md_src,@md_trn,@wrap_width=
         fn, data_src, data_trn, md_src, md_trn, wrap_width
        @md=(md_trn.nil?) \
        ? md_src
        : md_trn
        @tab="\t"
        @@endnotes_=(@md.opt.selections.str =~/--endnote/) \
        ? true
        : false    # --footnote
        @pot={
          body: [],
          open: [],
          close: [],
          head: [],
          metadata: [],
          tail: []
        }
      end
      def br
        (@md.opt.selections.str =~/--dos/) ? "\r\n" : "\n"  # --unix
      end
      def songsheet
        fn=@fn
        pot=pot_markup(@data_src,@data_trn)
        publish(fn,pot)
      end
      def pot_structure_wrap(desc,orig,trans,indent=0,hang=0)
        SiSU_Po4aUtils::Wrap.new(
          @md,
          orig,
          trans,
          desc,
          @wrap_width,
          indent,
          hang
        )
      end
      def wrap_endnotes(orig_notes='',trn_notes='')
        nt=@@endnotes_ ? 'endnote' : 'footnote'
        @fn=0
        a_l=orig_notes.length
        0.upto(a_l-1) do |i|
          @fn=if orig_notes[i].to_s =~/^\^~([\d*+]+)/ # provides endnote number within paragraph
            @fn += 1
          else @fn
          end
          d="#{nt} #{@fn}"
          mark="^~ "
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# footnotes, the preferred sisu markup for a footnote is~{this is a footnote}~ } \
            + %{however, for translation a footnote reference marker in the text~^ } \
            + %{with a set of notes following the paragraph starting on a newline with "^~ this is a footnote", } \
            + %{is easier to deal with, if possible these should be converted back to~{inline notes}~}
            s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=(orig_notes[i].to_s =~/^\^~[\d*+]+/) \
          ? (orig_notes[i].to_s.gsub(/^\^~[\d*+]+/,'^~'))
          : orig_notes[i].to_s
          trans=if trn_notes.is_a?(Array) \
          and trn_notes.length==orig_notes.length
            (trn_notes[i].to_s =~/^\^~[\d*+]+/) \
            ? (trn_notes[i].to_s.gsub(/^\^~[\d*+]+/,'^~'))
            : trn_notes[i].to_s
          else ''
          end
          util=pot_structure_wrap(desc,orig,trans)
          wrap=util.line_wrap
          wrap=if wrap =~ /^\s*\^~[\d*+]+\s+.+?\s*\Z/m
            wrap.gsub(/^\s*(\^~[\d*+]+)\s+(.+?)\s*\Z/m, <<GSUB
\\1 \\2
GSUB
                      )
          else
            wrap.gsub(/^(.+)\Z/m, <<GSUB
\\1
GSUB
                      )
          end
          @@endnotes[:para] << wrap
          @@endnotes[:end] << '' << wrap
        end
        @@endnotes[:para].each {|e| @pot[:body] << e << br}
        @@endnotes[:para]=[]
        @@endnotes
      end
      def pot_metadata_src
        @po4a_identify_type='type: SiSU doc' #'type: Plain text'
        meta_src=SiSU_Metadata::Summary.new(@md_src)
        w=[]
        w << [
          "#. #{@po4a_identify_type} - metadata: title",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.title.main,
          meta_src.metadata_tags.title.sub,
          meta_src.metadata_tags.title.edition,
          meta_src.metadata_tags.title.note,
          meta_src.metadata_tags.title.short,
          meta_src.metadata_tags.title.language,
          meta_src.metadata_tags.title.language_char,
          'msgstr ""',
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: creator",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.creator.head,
          meta_src.metadata_tags.creator.author,
          meta_src.metadata_tags.creator.contributor,
          meta_src.metadata_tags.creator.illustrator,
          meta_src.metadata_tags.creator.photographer,
          meta_src.metadata_tags.creator.translator,
          meta_src.metadata_tags.creator.audio,
          meta_src.metadata_tags.creator.digitized_by,
          meta_src.metadata_tags.creator.prepared_by,
          'msgstr ""',
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: rights",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.rights.head,
          meta_src.metadata_tags.rights.copyright.text,
          meta_src.metadata_tags.rights.copyright.translation,
          meta_src.metadata_tags.rights.copyright.illustrations,
          meta_src.metadata_tags.rights.copyright.photographs,
          meta_src.metadata_tags.rights.copyright.digitization,
          meta_src.metadata_tags.rights.copyright.audio,
          meta_src.metadata_tags.rights.license,
          'msgstr ""',
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: classify",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.classify.head,
          meta_src.metadata_tags.classify.subject,
          meta_src.metadata_tags.classify.topic_register,
          meta_src.metadata_tags.classify.loc,
          meta_src.metadata_tags.classify.dewey,
          #meta_src.metadata_tags.notes.relation,
          #meta_src.metadata_tags.notes.type,
          #meta_src.metadata_tags.identifier.oclc,
          #meta_src.metadata_tags.identifier.isbn,
          'msgstr ""',
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: date",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.date.head,
          meta_src.metadata_tags.date.added_to_site,
          meta_src.metadata_tags.date.available,
          meta_src.metadata_tags.date.created,
          meta_src.metadata_tags.date.issued,
          meta_src.metadata_tags.date.modified,
          meta_src.metadata_tags.date.published,
          meta_src.metadata_tags.date.valid,
          'msgstr ""',
        ]
        w << [
          "#. #{@po4a_identify_type} - processing, make instruction",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.processing_tags.make.language,
          meta_src.processing_tags.make.headings,
          meta_src.processing_tags.make.num_top,
          meta_src.processing_tags.make.breaks,
          meta_src.processing_tags.make.emphasis,
          meta_src.processing_tags.make.bold,
          meta_src.processing_tags.make.italics,
          meta_src.processing_tags.make.texpdf_font,
          'msgstr ""',
        ]
        w.each do |y|
          z=''
          y.each do |x|
            if x
              z += x + "\n" if x =~/^#|^msg(?:id|str)/
              z += %{"#{x}"\n} if x =~/^@\S+?:(?: |$)/
              z += %{"#{x}"\n} if x =~/^\s+:\S+?: /
            end
          end
          @pot[:metadata] << z << br
          #puts z unless z.empty?
        end
      end
      def pot_metadata_src_trn
        @po4a_identify_type='type: SiSU doc'
        #@po4a_identify_type='type: Plain text'
        meta_src=SiSU_Metadata::Summary.new(@md_src)
        meta_trn=SiSU_Metadata::Summary.new(@md_trn)
        w=[]
        w << [
          "#. #{@po4a_identify_type} - metadata: title",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.title.main,
          meta_src.metadata_tags.title.sub,
          meta_src.metadata_tags.title.edition,
          meta_src.metadata_tags.title.note,
          meta_src.metadata_tags.title.short,
          meta_src.metadata_tags.title.language,
          meta_src.metadata_tags.title.language_char,
          'msgstr ""',
          meta_trn.metadata_tags.title.main,
          meta_trn.metadata_tags.title.sub,
          meta_trn.metadata_tags.title.edition,
          meta_trn.metadata_tags.title.note,
          meta_trn.metadata_tags.title.short,
          meta_trn.metadata_tags.title.language,
          meta_trn.metadata_tags.title.language_char,
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: creator",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.creator.head,
          meta_src.metadata_tags.creator.author,
          meta_src.metadata_tags.creator.contributor,
          meta_src.metadata_tags.creator.illustrator,
          meta_src.metadata_tags.creator.photographer,
          meta_src.metadata_tags.creator.translator,
          meta_src.metadata_tags.creator.audio,
          meta_src.metadata_tags.creator.digitized_by,
          meta_src.metadata_tags.creator.prepared_by,
          'msgstr ""',
          meta_trn.metadata_tags.creator.head,
          meta_trn.metadata_tags.creator.author,
          meta_trn.metadata_tags.creator.contributor,
          meta_trn.metadata_tags.creator.illustrator,
          meta_trn.metadata_tags.creator.photographer,
          meta_trn.metadata_tags.creator.translator,
          meta_trn.metadata_tags.creator.audio,
          meta_trn.metadata_tags.creator.digitized_by,
          meta_trn.metadata_tags.creator.prepared_by,
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: rights",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.rights.head,
          meta_src.metadata_tags.rights.copyright.text,
          meta_src.metadata_tags.rights.copyright.translation,
          meta_src.metadata_tags.rights.copyright.illustrations,
          meta_src.metadata_tags.rights.copyright.photographs,
          meta_src.metadata_tags.rights.copyright.digitization,
          meta_src.metadata_tags.rights.copyright.audio,
          meta_src.metadata_tags.rights.license,
          'msgstr ""',
          meta_trn.metadata_tags.rights.head,
          meta_trn.metadata_tags.rights.copyright.text,
          meta_trn.metadata_tags.rights.copyright.translation,
          meta_trn.metadata_tags.rights.copyright.illustrations,
          meta_trn.metadata_tags.rights.copyright.photographs,
          meta_trn.metadata_tags.rights.copyright.digitization,
          meta_trn.metadata_tags.rights.copyright.audio,
          meta_trn.metadata_tags.rights.license,
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: classify",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.classify.head,
          meta_src.metadata_tags.classify.subject,
          meta_src.metadata_tags.classify.topic_register,
          meta_src.metadata_tags.classify.loc,
          meta_src.metadata_tags.classify.dewey,
          #meta_src.metadata_tags.notes.relation,
          #meta_src.metadata_tags.notes.type,
          #meta_src.metadata_tags.identifier.oclc,
          #meta_src.metadata_tags.identifier.isbn,
          'msgstr ""',
          meta_trn.metadata_tags.classify.head,
          meta_trn.metadata_tags.classify.subject,
          meta_trn.metadata_tags.classify.topic_register,
          meta_trn.metadata_tags.classify.loc,
          meta_trn.metadata_tags.classify.dewey,
          #meta_trn.metadata_tags.notes.relation,
          #meta_trn.metadata_tags.notes.type,
          #meta_trn.metadata_tags.identifier.oclc,
          #meta_trn.metadata_tags.identifier.isbn,
        ]
        w << [
          "#. #{@po4a_identify_type} - metadata: date",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.metadata_tags.date.head,
          meta_src.metadata_tags.date.added_to_site,
          meta_src.metadata_tags.date.available,
          meta_src.metadata_tags.date.created,
          meta_src.metadata_tags.date.issued,
          meta_src.metadata_tags.date.modified,
          meta_src.metadata_tags.date.published,
          meta_src.metadata_tags.date.valid,
          'msgstr ""',
          meta_trn.metadata_tags.date.head,
          meta_trn.metadata_tags.date.added_to_site,
          meta_trn.metadata_tags.date.available,
          meta_trn.metadata_tags.date.created,
          meta_trn.metadata_tags.date.issued,
          meta_trn.metadata_tags.date.modified,
          meta_trn.metadata_tags.date.published,
          meta_trn.metadata_tags.date.valid,
        ]
        w << [
          "#. #{@po4a_identify_type} - processing, make instruction",
          "#: en/#{@md.fns}:#{SiSU_Po4aUtils::PotNumber.new.num}",
          'msgid ""',
          meta_src.processing_tags.make.language,
          meta_src.processing_tags.make.headings,
          meta_src.processing_tags.make.num_top,
          meta_src.processing_tags.make.breaks,
          meta_src.processing_tags.make.emphasis,
          meta_src.processing_tags.make.bold,
          meta_src.processing_tags.make.italics,
          meta_src.processing_tags.make.texpdf_font,
          'msgstr ""',
          meta_trn.processing_tags.make.language,
          meta_trn.processing_tags.make.headings,
          meta_trn.processing_tags.make.num_top,
          meta_trn.processing_tags.make.breaks,
          meta_trn.processing_tags.make.emphasis,
          meta_trn.processing_tags.make.bold,
          meta_trn.processing_tags.make.italics,
          meta_trn.processing_tags.make.texpdf_font,
        ]
        w.each do |y|
          z=''
          y.each do |x|
            if x
              z += x + "\n" if x =~/^#|^msg(?:id|str)/
              z += %{"#{x}"\n} if x =~/^@\S+?:(?: |$)/
              z += %{"#{x}"\n} if x =~/^\s+:\S+?: /
            end
          end
          @pot[:metadata] << z << br
          #puts z unless z.empty?
        end
      end
      def auto_translate?(set_to=nil)
        @@auto_translation_=
        if @md.opt.act[:po4a_lang_trans][:set]==:on
          set_to \
          ? set_to
          : @@auto_translation_
        else :skip
        end
      end
      def auto_translation(src_txt,markup=:src) # check for an appropriate request flag
        auto_translate?(:skip)
        begin
          src_txt_clean=clean_text(src_txt,markup)
          src_txt_clean=src_txt_clean.
            gsub(/\n/,' ').
            gsub(/"/,'\"').
            gsub(/([()])/,'\\\\\1')
          trans=''
          unless auto_translate? == :skip
            require 'timeout'
            Timeout::timeout(60) {
              trans=`trans -b -no-ansi en:#{@md.opt.f_pth[:lng_is]} #{src_txt_clean}`.strip
              unless trans.empty?
                trans + ' {[G.Tr]}http://translate.google.com'
              end
            }
          end
          trans
        rescue
          auto_translate?(:skip)
          p 'timeout issues with translation, skip remaining'
        end
      end
      def pot_structure
        def heading(dob_src='',notes_s='',dob_trn='',notes_t='')   #% used to extract the structure of a document
          lv=n=n3=nil
          lv=dob_src.ln
          n=lv - 1
          n3=lv + 2
          util=nil
          fn=(dob_src.name=~/[a-z\d]/i) ? dob_src.name : ''
          mark="#{dob_src.lv}~#{fn} "
          d="#{dob_src.is.to_s} (level #{dob_src.lv})"
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# markup for headings is marker at the start of the line/object, } \
            + %{indicating the heading level, and if provided an associated name tag, } \
            + %{this heading is "#{mark}"}
            s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig="#{s_mark}#{dob_src.obj}"
          trans=((dob_trn=='') \
          || (dob_src.obj == dob_trn.obj)) \
          ? ''
          : "#{s_mark}#{dob_trn.obj}"
          if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
          and trans.empty? \
          and auto_translate?
            trans=auto_translation(dob_src.obj,:src)
          end
          util=pot_structure_wrap(desc,orig,trans)
          wrapped=util.line_wrap
          @pot[:body] << wrapped << br # main text, contents, body KEEP
          if @@endnotes[:para] \
          and notes_s.length > 0 \
          and not @@endnotes_
            @pot[:body] << br
            wrap_endnotes(notes_s,notes_t)
          elsif @@endnotes[:para] \
          and @@endnotes_
            @pot[:body] << br*2
          end
        end
        def para(dob_src='',notes_s='',dob_trn='',notes_t='')      #% used to extract the structure of a document
          util=nil
          wrapped=if dob_src.indent =~/[1-9]/ \
          and dob_src.indent == dob_src.hang
            s_mark=desc=orig=trans=''
            if dob_src.bullet_
              mark="_#{dob_src.indent}* "
              d="#{dob_src.is.to_s}: indent #{dob_src.indent}, bullet"
              instruct=s_mark=''
              if @md.opt.act[:maintenance][:set]==:on
                instruct=%{\n# markup for indented bullet text is at the start of the line/object, } \
                + %{an underscore followed by the indent level and an asterisk "#{mark}"}
                s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
              end
              desc="#{d}#{s_mark}#{instruct}"
            else
              mark="_#{dob_src.indent} "
              d="#{dob_src.is.to_s}: indent #{dob_src.indent}"
              instruct=s_mark=''
              if @md.opt.act[:maintenance][:set]==:on
                instruct=%{\n# markup for indented text is at the start of the line/object, } \
                + %{an underscore followed by the indent level "#{mark}"}
                s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
              end
              desc="#{d}#{s_mark}#{instruct}"
            end
            orig="#{s_mark}#{dob_src.obj}"
            trans=((dob_trn=='') \
            || (dob_src.obj == dob_trn.obj)) \
            ? ''
            : "#{s_mark}#{dob_trn.obj}"
            if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
            and trans.empty? \
            and auto_translate?
              trans=auto_translation(dob_src.obj,:src)
            end
            util=pot_structure_wrap(desc,orig,trans)
          elsif dob_src.hang =~/[0-9]/ \
          and dob_src.indent != dob_src.hang
            s_mark=desc=orig=trans=''
            mark="_#{dob_src.hang}_#{dob_src.indent} "
            d="#{dob_src.is.to_s}: hang #{dob_src.hang} indent #{dob_src.indent}"
            instruct=s_mark=''
            if @md.opt.act[:maintenance][:set]==:on
              instruct=%{\n# markup for indented text with a first line indented } \
              + %{to a different level from the rest of the paragraph, } \
              + %{is at the start of the line/object, } \
              + %{an underscore and the first indent level } \
              + %{a second underscore and the indent level for the rest of the paragraph, "#{mark1}"}
              s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
            end
            desc="#{d}#{s_mark}#{instruct}"
            orig="#{s_mark}#{dob_src.obj}"
            trans=((dob_trn=='') \
            || (dob_src.obj == dob_trn.obj)) \
            ? ''
            : "#{s_mark}#{dob_trn.obj}"
            if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
            and trans.empty? \
            and auto_translate?
              trans=auto_translation(dob_src.obj,:src)
            end
            util=pot_structure_wrap(desc,orig,trans)
          else
            s_mark=desc=orig=trans=''
            if dob_src.bullet_
              mark='_* '
              d="#{dob_src.is.to_s}: bullet"
              instruct=s_mark=''
              if @md.opt.act[:maintenance][:set]==:on
                instruct=%{\n# markup for indented text is at the start of the line/object, } \
                + %{an underscore followed by an asterisk "#{mark}"}
                s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
              end
              desc="#{d}#{s_mark}#{instruct}"
              orig="#{s_mark}#{dob_src.obj}"
              trans=((dob_trn=='') \
              || (dob_src.obj == dob_trn.obj)) \
              ? ''
              : "#{s_mark}#{dob_trn.obj}"
              if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
              and trans.empty? \
              and auto_translate?
                trans=auto_translation(dob_src.obj,:src)
              end
            else
              mark=''
              d=dob_src.is.to_s
              instruct=%{\n# regular paragraph, no special markup}
              if @md.opt.act[:maintenance][:set]==:on
                instruct="\n# "
                s_mark="\n# " + %{"\\n\\n#{mark}...\\n\\n"}
              end
              desc="#{d}#{s_mark}#{instruct}"
              orig=dob_src.obj
              trans=((dob_trn=='') \
              || (dob_src.obj == dob_trn.obj)) \
              ? ''
              : "#{s_mark}#{dob_trn.obj}"
              if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
              and trans.empty? \
              and auto_translate?
                trans=auto_translation(dob_src.obj,:src)
              end
            end
            util=pot_structure_wrap(desc,orig,trans)
          end
          wrapped=util.line_wrap
          @pot[:body] << wrapped << br # main text, contents, body KEEP
          if @@endnotes[:para] \
          and notes_s.length > 0 \
          and not @@endnotes_
            @pot[:body] << br
            wrap_endnotes(notes_s,notes_t)
          elsif @@endnotes[:para] \
          and @@endnotes_
            @pot[:body] << br*2
          end
        end
        def block(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark="block{\\n\\n...\\n\\n}block"
          d=dob_src.is.to_s
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# block text is a text block with an opening and closing marker, } \
            + %{the content of which may be wrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=dob_src.obj
          trans=((dob_trn=='') \
          || (dob_src.obj == dob_trn.obj)) \
          ? ''
          : "#{s_mark}#{dob_trn.obj}"
          if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
          and trans.empty? \
          and auto_translate?
            trans=auto_translation(dob_src.obj,:src)
          end
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def group(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark="group{\\n\\n...\\n\\n}group"
          d=dob_src.is.to_s
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# group text is a text block with an opening and closing marker, } \
            + %{the content of which may be wrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=dob_src.obj
          trans=((dob_trn=='') \
          || (dob_src.obj == dob_trn.obj)) \
          ? ''
          : "#{s_mark}#{dob_trn.obj}"
          if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
          and trans.empty? \
          and auto_translate?
            trans=auto_translation(dob_src.obj,:src)
          end
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def verse(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark="poem{\n\nverse\n\nverse\n\n...\n\n}poem"
          d=dob_src.is.to_s
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# verse are part of the text block described as a poem, } \
            + %{the first verse is preceeded by an opening marker, } \
            + %{and the last verse by a closing marker, } \
            + %{the content of which should remain unwrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=dob_src.obj
          trans=(dob_trn=='') ? '' : dob_trn.obj
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def code(dob_src='',notes_s='',dob_trn='',notes_t='')      #% used to extract the structure of a document
          mark="code{\\n\\n...\\n\\n}code"
          d=dob_src.is.to_s
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# codeblocks are a text block with an opening and closing marker, } \
            + %{the content of which should remain unwrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=dob_src.obj
          trans=(dob_trn=='') ? '' : dob_trn.obj
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def table(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark="table{\\n\\n...\\n\\n}table"
          d=dob_src.is.to_s
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# tables are a text block with an opening and closing marker, } \
            + %{the content of which should remain unwrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          desc="#{d}#{s_mark}#{instruct}"
          orig=dob_src.obj
          orig=orig.gsub(/#{Mx[:tc_c]}/,"\n")
          trans=(dob_trn=='') ? '' : dob_trn.obj
          trans=trans.gsub(/#{Mx[:tc_c]}/,"\n")
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def idx_markup(idx)
          struct=['={']
          idx.sort.each do |x|
            x.each_with_index do |y,i0|
              case y
              when String
                struct << ';' unless struct[-1] =~/=\{/
                struct << y
                if x[i0+1].class == Hash \
                and x[i0+1][:sub].length > 0
                  struct << ':'
                end
              when Hash
                if y[:plus].to_i > 0
                  struct << '+' + y[:plus].to_s
                end
                if y[:sub].length > 0
                  y[:sub].each_with_index do |z,i1|
                    z.each_with_index do |a,i2|
                      #p a
                      if z.length > 0
                        struct << a[0]
                        if a[1][:plus].to_i > 0
                          struct << '+' + a[1][:plus].to_s
                        end
                        if (i1 + 1) < y[:sub].length
                          struct << '|'
                        end
                      end
                    end
                  end
                end
              end
            end
          end
          struct << '}'
          #puts struct.join
          struct.join
        end
        def idx(dob_src='',dob_trn='')                             #% used for book index but broken as original markup lost, already abstracted, fix
          mark="={ ... }"
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# the book index should be attached unwrapped to the preceding text block } \
            + %{(there should be a new line, but no empty line)}
            s_mark="\n# " + %{"\\n#{mark}\\n\\n"}
          end
          d='book-idx'
          desc="#{d}#{s_mark}#{instruct}"
          orig=pot_structure.idx_markup(dob_src.idx) #'={' + dob_src.idx + '}'
          trans=if defined? dob_trn.idx \
          and not dob_trn.idx.nil? \
          and not dob_trn.idx.empty?
            pot_structure.idx_markup(dob_trn.idx) #'={' + dob_trn.idx + '}'
          else ''
          end
          util=pot_structure_wrap(desc,orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        self
      end
      def pot_markup(data_src,data_trn)
        #@endnotes,@copen,@pot_contents_close=Array.new(3){[]}
        a_l=if data_trn
        a_l=(data_src.length >= data_trn.length) \
        ? data_src.length
        : data_trn.length
        else
          data_src.length
        end
        s,t=0,0
        if @md.fns =~ /\.(?:(?:-|ssm\.)?sst|ssm)$/
          (data_trn.nil?) \
          ? pot_metadata_src
          : pot_metadata_src_trn
        end
        0.upto(a_l-1) do |i|
          if data_trn
            unless data_src[s] \
            and data_trn[t]
              break
            end
            if data_src[s].of == :comment \
            and data_trn[t].of == :comment \
            and (data_src[s].is == data_trn[t].is)
              s+=1;t+=1
              next
            end
            if ((data_src[s].is == :comment) \
            || (data_trn[t].is == :comment)) \
            and (data_src[s].is != data_trn[t].is)
              if data_src[s].is == :comment
                if @md.opt.act[:maintenance][:set]==:on
                  puts "src (comment):\n\t" \
                  + data_src[s].obj
                end
                s+=1
                #next if data_src[s].is == :comment
              elsif data_trn[t].is == :comment
                if @md.opt.act[:maintenance][:set]==:on
                  puts "trans (comment):\n\t" \
                  + data_trn[t].obj
                end
                t+=1
                #next if data_trn[t].is == :comment
              end
            end
            if ((defined? data_src[s].ocn) \
            && (data_src[s].ocn.is_a?(Fixnum))) \
            and ((defined? data_trn[t].ocn) \
            && (data_trn[t].ocn.is_a?(Fixnum))) \
            and (data_src[s].ocn == data_trn[t].ocn)
              @m_s,@m_t=s,t
            elsif ((defined? data_src[s].ocn) \
            && (data_src[s].ocn.is_a?(Fixnum))) \
            and ((defined? data_trn[t].ocn) \
            && (data_trn[t].ocn.is_a?(Fixnum))) \
            and (data_src[s].ocn != data_trn[t].ocn)
              p '--- OCN ---'
              p 'mis-match'
              p data_src[s].ocn
              p data_src[s].obj
              p data_trn[t].ocn
              p data_trn[t].obj
              p '---'
              p 'previous match'
              p data_src[@m_s].ocn
              p data_src[@m_s].obj
              p data_trn[@m_t].ocn
              p data_trn[@m_t].obj
              exit
            elsif (((defined? data_src[s].ocn) \
            && (defined? data_trn[t].ocn)) \
            and data_src[s].ocn.class != data_trn[t].ocn.class)
              p '--- OCN class ---'
              p 'mis-match'
              p data_src[s].ocn if defined? data_src[s].ocn
              p data_src[s].obj
              p data_trn[t].ocn if defined? data_trn[t].ocn
              p data_trn[t].obj
              #p '---'
              #p 'previous match'
              #p data_src[@m_s].ocn
              #p data_src[@m_s].obj
              #p data_trn[@m_t].ocn
              #p data_trn[@m_t].obj
            #elsif (defined? data_src[s].ocn != defined? data_trn[t].ocn) \
            #and (data_src[s].ocn.nil? != data_trn[t].ocn.nil?)
            #  p '--- missing OCN? ---'
            #  p 'mis-match'
            #  p data_src[s].ocn if defined? data_src[s].ocn
            #  p data_src[s].obj
            #  p data_trn[t].ocn if defined? data_trn[t].ocn
            #  p data_trn[t].obj
            else
            end
          end
          notes_s,notes_t='',''
          data_src[s],notes_s=markup(data_src[s])
          if data_trn
            data_trn[t],notes_t=markup(data_trn[t])
            #data_src[s],data_trn[t]=pot_data(data_src[s],notes_s,data_trn[t],notes_t)
            pot_data(data_src[s],notes_s,data_trn[t],notes_t)
          else
            #data_src[s],nul=pot_data(data_src[s],notes_s)
            pot_data(data_src[s],notes_s)
          end
          s+=1;t+=1
        end
        @pot #watch
      end
      def pot_data(dob_src='',notes_s='',dob_trn='',notes_t='')
        if dob_src.obj !~/(^#{Rx[:meta]}|#{Mx[:br_eof]}|#{Mx[:br_endnotes]})/
          if defined? dob_src.ocn \
          and dob_src.ocn.to_s =~/\d+/
            paranum=dob_src.ocn.to_s
            @p_num=SiSU_Po4aUtils::ParagraphNumber.new(paranum)
          end
          case dob_src.is
          when :heading
            pot_structure.heading(dob_src,notes_s,dob_trn,notes_t)
          when :para
            pot_structure.para(dob_src,notes_s,dob_trn,notes_t)
          when :group
            pot_structure.group(dob_src,notes_s,dob_trn,notes_t)
          when :block
            pot_structure.block(dob_src,notes_s,dob_trn,notes_t)
          when :verse
            pot_structure.verse(dob_src,notes_s,dob_trn,notes_t)
          when :code
            pot_structure.code(dob_src,notes_s,dob_trn,notes_t)
          when :table
            pot_structure.table(dob_src,notes_s,dob_trn,notes_t)
          end
          if defined? dob_src.idx \
          and not dob_src.idx.nil? \
          and not dob_src.idx.empty?
            pot_structure.idx(dob_src,dob_trn)
          end
          dob_src='' if (dob_src.obj =~/<a name="n\d+">/ \
          and dob_src.obj =~/^(-\{{2}~\d+|<!e[:_]\d+!>)/) # -endnote
          if dob_src ## Clean Prepared Text
            dob_src.obj=dob_src.obj.gsub(/<!.+!>/,' ').
              gsub(/<:\S+>/,' ') if dob_src ## Clean Prepared Text
          end
        end
        #[dob_src,dob_trn]
      end
      def markup(dob)
        dob,notes=objects.textface_marks_po4a(dob,:separate)
        [dob,notes]
      end
      def publish(fn,pot)
        content=[]
        content << pot[:open]
        content << pot[:head]
        content << pot[:metadata]
        content << pot[:body]
        content << @@endnotes[:end] if @@endnotes_
        Output.new(fn,content,@md,@process).po4a
        @@endnotes={ para: [], end: [] }
      end
    end
    class Po4aCfg
      include SiSU_Composite_Doc_Utils                    # composite doc, .ssm, extract all related insert files, array of filenames test
      def initialize(opt,file)
        @opt,@file=opt,file
      end
      def po4a_cfg_filename
        'po4a.cfg'
      end
      def dir
        def pwd
          Dir.pwd
        end
        def po4a_
          'po4a/' # ''
        end
        def pot
          po4a_ + 'pot'
        end
        def po
          po4a_ + 'po'
        end
        self
      end
      def po4a_cfg_file
        File.open("#{Dir.pwd}/#{po4a_cfg_filename}",'w')
      end
      def language
        def sisu_languages_available
          Px[:lng_lst]
        end
        def translation_languages_selected
          @opt.act[:po4a_lang_trans][:trn] \
          ? @opt.act[:po4a_lang_trans][:trn]
          : []
        end
        def translation_languages_selected_that_are_available
          translation_languages_selected & sisu_languages_available
        end
        def source_language_selected_str
          @opt.act[:po4a_lang_trans][:src] \
          ? @opt.act[:po4a_lang_trans][:src]
          : 'en'
        end
        def translation_languages_selected_that_are_available_str
          translation_languages_selected_that_are_available.join(' ')
        end
        def translation_languages_selected_str
          @opt.act[:po4a_lang_trans][:trn].join(' ')
        end
        self
      end
      def po4a_cfg
        doc_import_list=composite_and_imported_filenames_array(@opt.fno)
        po4a_cfg_arr=[]
        po4a_cfg_arr \
          << "[po4a_langs] #{language.translation_languages_selected_that_are_available_str}"
        po4a_cfg_arr \
          << "[po4a_paths] #{dir.pot}/$master.pot $lang:#{dir.po}/$lang/$master.po"
        doc_import_list.each do |file_src|
          file_src_fn=
            file_src.gsub(/#{language.source_language_selected_str}\//,'')
          po4a_cfg_arr \
            << "[type: text] #{file_src} $lang:$lang/#{file_src_fn}"
        end
        file=@file.write_file.po4a_cfg
        po4a_cfg_arr.each do |txt|
        puts txt
          file << txt << "\n"
        end
        file.close
      end
    end
    class Output <Source
      include SiSU_Param
      include SiSU_Env
      def initialize(fn,content,md,process=:complete)
        @fn,@content,@md,@process=fn,content,md,process
        @file=SiSU_Env::FileOp.new(md,fn)
      end
      def po4a                                                                 #%pot output
        file_pot=(@md.opt.f_pth[:lng] == @md.opt.lng_base) \
        ? @file.write_file.pot
        : @file.write_file.po
        @sisu=[]
        emptyline=0
        @content.each do |para|                                                # this is a hack
          if para.is_a?(Array) \
          and para.length > 0
            para.each do |line|
              if line
                line=line.gsub(/\s+$/m,'').
                  gsub(/^\A[ ]*\Z/m,'')
                if line=~/^\A[ ]*\Z/m
                  emptyline+=1
                else emptyline=0
                end
                file_pot.puts line if emptyline < 2                     #remove extra line spaces (fix upstream)
              end
            end
          else file_pot.puts para          #unix plaintext # /^([*=-]|\.){5}/
          end
        end
        file_pot.close
        SiSU_Po4aUtils::PotNumber.new.reset
        po4a_git
      end
      def po4a_git
        unless @md.opt.act[:maintenance][:set]==:on
          require_relative 'git'                           # git.rb
          git=SiSU_Git::Source.new(@md.opt,@process)
          unless FileTest.directory?(@file.output_path.pot_git.dir)
            git.create_file_structure_git
          end
          if @md.opt.f_pth[:lng] == @md.opt.lng_base
            FileUtils::cp(
              @file.place_file.pot.dir,
              @file.output_path.pot_git.dir
            )
          else # naive, work on -->
            FileUtils::cp(
              @file.place_file.po.dir,
              @file.output_path.po_git.dir
            ) #unless FileTest.file?(@file.place_file.po_git.dir)
          end
          git.read
        end
      end
    end
  end
end
__END__
&#033;\|&#035;\|&&#042;\|&#045;\|&#047;\|&#095;\|&#123;\|&#125;\|&#126;\|&#

tables are problematic, difficult to reconstitute instruction, check

metadata, move to top? and work on

footnotes, different types, asterisk, also do you want to have separate
paragraphs, or breaks within one block?

where no ocn appropriately use ~# or -# or indeed 1~name-

comments in document, what to do about them, not sure they are currently
retained in dal, could be quite valuable to keep

Translate Shell
http://www.soimort.org/translate-shell/
translate.google.com
#+END_SRC

* src_po4a_shelf_set.rb

#+HEADER: :tangle "../lib/sisu/src_po4a_shelf_set.rb"
#+BEGIN_SRC ruby
#<<sisu_document_header>>
module SiSU_Po4aUtils
  class Wrap
    def initialize(md,orig='',trans='',is_desc='',n_char_max=76,n_indent=0,n_hang=nil)
      @md,@orig,@trans,@is_desc,@n_char_max,@n_indent=
       md, orig, trans, is_desc, n_char_max, n_indent
      @n_char_max_extend = n_char_max
      @br="\n"
      @n_hang=n_hang ? n_hang : @n_indent
      @po4a_identify_type='type: SiSU doc'
      #@po4a_identify_type='type: Plain text'
    end
    def line_wrap
      space=' '
      spaces_indent,spaces_hang=
        "#{@br}#{space*@n_indent}",space*@n_hang
      pot,i=[],0
      pot_array=(@trans.empty?) ? [@orig] : [@orig,@trans]
      pot_array.each do |pa|
        line=0
        out=[]
        out[line]=''
        @oldword='' #REMOVE @oldword
        pa=pa.gsub(/<br>/,' <br> ').
          gsub(/#{Mx[:br_nl]}/,"\n\n")
        words=pa.scan(/\n\n|\\\\\\|<br>|\S+/m)
        while words != ''
          word=words.shift
          if not word
            out[line] unless out[line].empty? #check
            break
          elsif word =~/\n\n/
            word="\n"
            @n_char_max_extend = @n_char_max + out[line].length
            line=line
          elsif (out[line].length + word.length) > (@n_char_max_extend - @n_indent) \
          and out[line] =~/\S+/
            @n_char_max_extend = @n_char_max
            out[line].squeeze!(' ')
            line += 1
          end
          if word
            out[line]=if out[line] \
            and out[line] !~/\S+$/m
              "#{out[line]}#{word}"
            elsif out[line] \
            and out[line] =~/\S+/
              "#{out[line]} #{word}"
            else "#{word.strip}"
            end
          end
          @oldword=word if word =~/\S+/
        end
        x=out.join(spaces_indent).gsub(/\A\n+/m,'').insert(0,spaces_hang)
        z=[]
        x.split(/\n/).each do |y|
          y=y.gsub(/"/,'\"')
          y=%{"#{y}"}
          z << y
        end
        pot[i]=z.join("\n")
        i +=1
        pot
      end
      trans=(pot.length == 2) ? pot[1] : ''
      po_str=<<WOK
#. #{@po4a_identify_type} - #{@is_desc}
#: en/#{@md.fns}:#{PotNumber.new.num}
msgid ""
#{pot[0]}
msgstr ""
#{trans}
WOK
      po_str
    end
    def no_line_wrap_block
      pot,i=[],0
      pot_array=(@trans.empty?) ? [@orig] : [@orig,@trans]
      pot_array.each do |pa|
        z=[]
        pa.split(/\n\n/).each do |y|
          y=y.gsub(/"/,'\"')
          y=%{"#{y}"}
          z << y if not y.empty?
        end
        pot[i]=z.join("\n")
        i +=1
        pot
      end
      trans=(pot.length == 2) ? pot[1] : ''
      po_str=<<WOK
#. #{@po4a_identify_type} - #{@is_desc}
#: en/#{@md.fns}:#{PotNumber.new.num}
#, no-wrap
msgid ""
#{pot[0]}
msgstr ""
#{trans}
WOK
      po_str
    end
    def line_wrap_indent1
      @n_indent,@n_hang=2,2
      line_wrap
    end
    def line_wrap_endnote
      @n_indent,@n_hang=4,2
      line_wrap
    end
    def array_wrap
      if @orig.is_a?(Array)
        @arr=[]
        @orig.each do |line|
          @arr << SiSU_TextUtils::Wrap.new(line,@n_char_max,@n_indent,@n_hang).line_wrap
        end
      end
      @arr
    end
  end
  class HeaderScan
    def initialize(md,para)
      @md,@p=md,para
    end
    def extract(tag,tag_content,type,attrib)
      if dc_tag \
      and dc_content
        [dc_tag,dc_content,{dc_tag=>dc_content}]
      else nil
      end
    end
    def header(tag,tag_content,type='',attrib='') #this will break stuff and must be tested thoroughly 20060825
      @tag,@tag_content,@type,@attrib=tag,tag_content,type,attrib
      def label #element
        @tag
      end
      def type
        @type
      end
      def text
        @tag_content
      end
      def info  #element text
        @tag_content
      end
      def attribute
        @attrib
      end
      def element
        @tag
      end
      def attrib
        @attrib
      end
      def el
        @tag
      end
      self
    end
    def start_is_match
      case @p
      when /^#{Mx[:meta_o]}(title)#{Mx[:meta_c]}\s*(.+?)$/                      then header($1,@md.title.full,'meta','dc') #dc 1
      when /^#{Mx[:meta_o]}(creator|author)#{Mx[:meta_c]}\s*(.+?)$/             then header('creator',$2,'meta','dc')    #dc 2
      when /^#{Mx[:meta_o]}(subject)#{Mx[:meta_c]}\s*(.+?)$/                    then header($1,$2,'meta','dc')           #dc 3
      when /^#{Mx[:meta_o]}(description)#{Mx[:meta_c]}\s*(.+?)$/                then header($1,$2,'meta','dc')           #dc 4
      when /^#{Mx[:meta_o]}(publisher)#{Mx[:meta_c]}\s*(.+?)$/                  then header($1,$2,'meta','dc')           #dc 5
      when /^#{Mx[:meta_o]}(contributor)#{Mx[:meta_c]}\s*(.+?)$/                then header($1,$2,'meta','dc')           #dc 6
      when /^#{Mx[:meta_o]}(date)#{Mx[:meta_c]}\s*(.+?)$/                       then header($1,$2,'meta','dc')           #dc 7
      when /^#{Mx[:meta_o]}(date\.created)#{Mx[:meta_c]}\s*(.+?)$/              then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(date\.issued)#{Mx[:meta_c]}\s*(.+?)$/               then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(date\.available)#{Mx[:meta_c]}\s*(.+?)$/            then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(date\.valid)#{Mx[:meta_c]}\s*(.+?)$/                then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(date\.modified)#{Mx[:meta_c]}\s*(.+?)$/             then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(type)#{Mx[:meta_c]}\s*(.+?)$/                       then header($1,$2,'meta','dc')           #dc 8
      when /^#{Mx[:meta_o]}(format)#{Mx[:meta_c]}\s*(.+?)$/                     then header($1,$2,'meta','dc')           #dc 9
      when /^#{Mx[:meta_o]}(identifier)#{Mx[:meta_c]}\s*(.+?)$/                 then header($1,$2,'meta','dc')           #dc 10
      when /^#{Mx[:meta_o]}(source)#{Mx[:meta_c]}\s*(.+?)$/                     then header($1,$2,'meta','dc')           #dc 11
      when /^#{Mx[:meta_o]}(language)#{Mx[:meta_c]}\s*(.+?)$/                   then header($1,$2,'meta','dc')           #dc 12
      when /^#{Mx[:meta_o]}(relation)#{Mx[:meta_c]}\s*(.+?)$/                   then header($1,$2,'meta','dc')           #dc 13
      when /^#{Mx[:meta_o]}(coverage)#{Mx[:meta_c]}\s*(.+?)$/                   then header($1,$2,'meta','dc')           #dc 14
      when /^#{Mx[:meta_o]}(rights)#{Mx[:meta_c]}\s*(.+?)$/                     then header($1,$2,'meta','dc')           #dc 15
      when /^#{Mx[:meta_o]}(keywords)#{Mx[:meta_c]}\s*(.+?)$/                   then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(copyright)#{Mx[:meta_c]}\s*(.+?)$/                  then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(translator|translated_by)#{Mx[:meta_c]}\s*(.+?)$/   then header('translator',$2)
      when /^#{Mx[:meta_o]}(illustrator|illustrated_by)#{Mx[:meta_c]}\s*(.+?)$/ then header('illustrator',$2)
      when /^#{Mx[:meta_o]}(prepared_by)#{Mx[:meta_c]}\s*(.+?)$/                then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(digitized_by)#{Mx[:meta_c]}\s*(.+?)$/               then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(comments?)#{Mx[:meta_c]}\s*(.+?)$/                  then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(abstract)#{Mx[:meta_c]}\s*(.+?)$/                   then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(tags?)#{Mx[:meta_c]}\s*(.+?)$/                      then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(catalogue)#{Mx[:meta_c]}\s*(.+?)$/                  then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(class(?:ify)?_loc)#{Mx[:meta_c]}\s*(.+?)$/          then header('classify_loc',$2,'meta','extra')
      when /^#{Mx[:meta_o]}(class(?:ify)?_dewey)#{Mx[:meta_c]}\s*(.+?)$/        then header('classify_dewey',$2,'meta','extra')
      when /^#{Mx[:meta_o]}(class(?:ify)?_pg)#{Mx[:meta_c]}\s*(.+?)$/           then header('classify_pg',$2,'meta','extra')
      when /^#{Mx[:meta_o]}(class(?:ify)?_isbn)#{Mx[:meta_c]}\s*(.+?)$/         then header('classify_isbn',$2,'meta','extra')
      when /^#{Mx[:meta_o]}(toc|structure)#{Mx[:meta_c]}\s*(.+?)$/              then header('structure',$2,'process','instruct')
      when /^#{Mx[:meta_o]}(level|page|markup)#{Mx[:meta_c]}\s*(.+?)$/          then header('markup',$2,'process','instruct')
      when /^#{Mx[:meta_o]}(bold)#{Mx[:meta_c]}\s*(.+?)$/                       then header($1,$2,'process','instruct')
      when /^#{Mx[:meta_o]}(italics|itali[sz]e)#{Mx[:meta_c]}\s*(.+?)$/         then header('italicize',$2,'process','instruct')
      when /^#{Mx[:meta_o]}(vocabulary|wordlist)#{Mx[:meta_c]}\s*(.+?)$/        then header('vocabulary',$2,'process','instruct')
      when /^#{Mx[:meta_o]}(css|stylesheet)#{Mx[:meta_c]}\s*(.+?)$/             then header('css',$2,'process','instruct')
      when /^#{Mx[:meta_o]}(links)#{Mx[:meta_c]}\s*(.+?)$/                      then header($1,$2,'process','instruct')
      when /^#{Mx[:meta_o]}(prefix)#{Mx[:meta_c]}\s*(.+?)$/                     then header($1,$2,'process','instruct') #add a & b
      when /^#{Mx[:meta_o]}(suffix)#{Mx[:meta_c]}\s*(.+?)$/                     then header($1,$2,'process','instruct')
      when /^#{Mx[:meta_o]}(information)#{Mx[:meta_c]}\s*(.+?)$/                then header($1,$2,'process','instruct')
      when /^#{Mx[:meta_o]}(contact)#{Mx[:meta_c]}\s*(.+?)$/                    then header($1,$2,'process','instruct')
      when /^#{Mx[:meta_o]}(rcs|cvs)#{Mx[:meta_c]}\s*(.+?)$/                    then header('version',$2,'process','instruct')
      else nil
      end
    end
    def dublin
      (@p =~/^#{Mx[:meta_o]}\S+?#{Mx[:meta_c]}/) \
      ? start_is_match
      : nil
    end
    def meta
      (@p =~/^#{Mx[:meta_o]}\S+?#{Mx[:meta_c]}/) \
      ? start_is_match
      : nil
    end
  end
  class ParagraphNumber
    def initialize(paranum)
      @paranum=/(\d+)/m.match(paranum)[1]
    end
    def display
      @paranum.gsub(/(\d+)/,'#\1')
    end
  end
  class PotNumber
    @@n=0
    def initialize
      @@n +=2
    end
    def num
      @@n
    end
    def reset
      @@n=0
    end
  end
end
__END__
#+END_SRC

* src_po4a_sst_ao_sst.rb

#+HEADER: :tangle "../lib/sisu/src_po4a_sst_ao_sst.rb"
#+BEGIN_SRC ruby
#<<sisu_document_header>>
module SiSU_SStm_AO_SStm
  require_relative 'ao'                                 # ao.rb
  require_relative 'se'                                 # se.rb
    include SiSU_Env
  require_relative 'ao_composite'                       # ao_composite.rb
  require_relative 'shared_metadata'                    # shared_metadata.rb
  require_relative 'src_po4a_share'                     # src_po4a_share.rb
  require_relative 'src_po4a_sst_ao_sst_set'            # src_po4a_sst_ao_sst_set.rb
  include SiSU_Param
  require_relative 'object_munge'                       # object_munge.rb
  require_relative 'utils_composite'                    # utils_composite.rb
  require_relative 'utils_response'                     # utils_response.rb
  class Source
    include SiSU_Object_Munge
    include SiSU_Languages_Selected
    include SiSU_Response
    @@md_src,@@md_master=
          nil,      nil
    @@auto_translation_ = :go
    def initialize(opt,fn=nil)
      @opt,@fn=opt,fn
      #unless @opt.fns =~/(.+?\.(?:-|ssm\.)?sst)$/
      #  puts "#{@opt.fns} not a processed file type"
      #end
      file_arr=SiSU_Info_Env::InfoEnv.new.
        source_file_processing_array(@opt.fno)
      SiSU_Param::Parameters::Instructions.new(file_arr,@opt).extract
      r=Px[:lng_lst_rgx].gsub(/\|#{language.source_language_selected_str}\|/,'|')
      @lang_regx=%r{(?:#{r})}
      @@todo=if source_language_selected_str == opt.f_pth[:lng]
        :same_file
      else :compare
      end
      if opt.f_pth[:lng]==@opt.lng_base \
      and opt.f_pth[:lng]==source_language_selected_str
        @@md_master=SiSU_Param::Parameters.new(opt).get
      end
    end
    def wrap_width_set(md,env)
      if defined? md.make.plaintext_wrap \
      and md.make.plaintext_wrap
        md.make.plaintext_wrap
      elsif defined? env.plaintext_wrap \
      and env.plaintext_wrap
        #env.plaintext_wrap # 78 use 75
        75
      else 75 #78
      end
    end
    def process_file(md,env,file,wrap_width,fn)
      if source_language_selected_str == @opt.f_pth[:lng]
        @@ao_arr_lang_trans=
          SiSU_AO::Source.new(
            @opt,
            fn,
            :po4a
          ).get # ao file drawn here
      end
      @ao_arr_lang_src=
        SiSU_AO::Source.new(
          @opt,
          fn,
          :po4a
        ).get # ao file drawn here
      SiSU_SStm_AO_SStm::Source::Scroll.new(
        fn,
        @ao_arr_lang_src,
        @@ao_arr_lang_trans,
        @@md_src,
        @@md_master,
        wrap_width
      ).songsheet
    end
    def read_process_src_files
      begin
        src={}
        src[:pth]=@opt.f_pth[:pth]
        src[:files]=if @opt.fns =~ /\.(?:(?:-|ssm\.)sst|ssm)$/
          @opt.fns=@opt.fns.gsub(/\.ssm\.sst$/,'.ssm')
          SiSU_Assemble::CompositeFileList.new(@opt).read
        else
          [@opt.fns]
        end
        md=SiSU_Param::Parameters.new(@opt).get
        env=SiSU_Env::InfoEnv.new(@opt.fns)
        file=SiSU_Env::FileOp.new(md)
        lng=/\/([^\/]+)$/.match(src[:pth])[1]
        if language.source_language_selected_str == lng
          SiSU_Po4a_Project::Po4aDistClean.new(@opt,file).song
        end
        wrap_width=wrap_width_set(md,env)
        lng = /\/([^\/]+)$/.match(src[:pth])[1]
        ans=response?('process files?')
        if ans
          src[:files].each do |fn|
            puts "[#{lng}] #{fn}"
            process_file(md,env,file,wrap_width,fn)
          end
        end
      rescue
        SiSU_Errors::Rescued.new($!,$@,@opt.selections.str,@opt.fns).location do
          __LINE__.to_s + ':' + __FILE__
        end
      ensure
      end
    end
    def read_setup
      begin
        md=SiSU_Param::Parameters.new(@opt).get
        file=SiSU_Env::FileOp.new(md)
        SiSU_Po4a_Project::Po4aCfg.new(@opt,file).song
        SiSU_Po4a_Project::Po4aProject.new(@opt,file).song
      rescue
        SiSU_Errors::Rescued.new($!,$@,@opt.selections.str,@opt.fns).location do
          __LINE__.to_s + ':' + __FILE__
        end
      ensure
      end
    end
    private
    class Scroll <Source
      include SiSU_Po4aUtils
      @@endnotes={ para: [], end: [] }
      def initialize(fn,data_src,data_master,md_src,md_master,wrap_width)
        @fn,@data_src,@data_master,@md_src,@md_master,@wrap_width=
         fn, data_src, data_master, md_src, md_master, wrap_width
        @md=md_src
        @tab="\t"
        @@endnotes_=(@md.opt.selections.str =~/--endnote/) \
        ? true
        : false    # --footnote
        @pot={
          body: [],
          open: [],
          close: [],
          head: [],
          metadata: [],
          tail: []
        }
      end
      def br
        (@md.opt.selections.str =~/--dos/) ? "\r\n" : "\n"  # --unix
      end
      def songsheet
        fn=@fn
        pot=compare_structure_src_trn(@data_src,@data_master,@@todo)
        publish(fn,pot)
      end
      def pot_structure_wrap(orig,trans,indent=0,hang=0)
        SiSU_Po4aUtils::Wrap.new(
          @md,
          orig,
          trans,
          @wrap_width,
          indent,
          hang
        )
      end
      def wrap_endnotes(orig_notes='',trn_notes='')
        #nt=@@endnotes_ ? 'endnote' : 'footnote'
        @fn=0
        a_l=orig_notes.length
        0.upto(a_l-1) do |i|
          @fn=if orig_notes[i].to_s =~/^\^~([\d*+]+)/ # provides endnote number within paragraph
            @fn += 1
          else @fn
          end
          #mark="^~ "
          orig=(orig_notes[i].to_s =~/^\^~[\d*+]+/) \
          ? (orig_notes[i].to_s.gsub(/^\^~[\d*+]+/,'^~'))
          : orig_notes[i].to_s
          trans=if trn_notes.is_a?(Array) \
          and trn_notes.length==orig_notes.length
            (trn_notes[i].to_s =~/^\^~[\d*+]+/) \
            ? (trn_notes[i].to_s.gsub(/^\^~[\d*+]+/,'^~'))
            : trn_notes[i].to_s
          else ''
          end
          util=pot_structure_wrap(orig,trans)
          wrap=util.line_wrap
          wrap=if wrap =~ /^\s*\^~[\d*+]+\s+.+?\s*\Z/m
            wrap.gsub(/^\s*(\^~[\d*+]+)\s+(.+?)\s*\Z/m, <<GSUB
\\1 \\2
GSUB
                      )
          else
            wrap.gsub(/^(.+)\Z/m, <<GSUB
\\1
GSUB
                      )
          end
          @@endnotes[:para] << wrap
          @@endnotes[:end] << '' << wrap
        end
        @@endnotes[:para].each {|e| @pot[:body] << e << br}
        @@endnotes[:para]=[]
        @@endnotes
      end
      def pot_metadata_src
        @po4a_identify_type='type: SiSU doc' #'type: Plain text'
        meta_src=SiSU_Metadata::Summary.new(@md_src)
        w=[]
        w << [
          meta_src.metadata_tags.title.main,
          meta_src.metadata_tags.title.sub,
          meta_src.metadata_tags.title.edition,
          meta_src.metadata_tags.title.note,
          meta_src.metadata_tags.title.short,
          meta_src.metadata_tags.title.language,
          meta_src.metadata_tags.title.language_char,
        ]
        w << [
          meta_src.metadata_tags.creator.head,
          meta_src.metadata_tags.creator.author,
          meta_src.metadata_tags.creator.contributor,
          meta_src.metadata_tags.creator.illustrator,
          meta_src.metadata_tags.creator.photographer,
          meta_src.metadata_tags.creator.translator,
          meta_src.metadata_tags.creator.audio,
          meta_src.metadata_tags.creator.digitized_by,
          meta_src.metadata_tags.creator.prepared_by,
        ]
        w << [
          meta_src.metadata_tags.rights.head,
          meta_src.metadata_tags.rights.copyright.text,
          meta_src.metadata_tags.rights.copyright.translation,
          meta_src.metadata_tags.rights.copyright.illustrations,
          meta_src.metadata_tags.rights.copyright.photographs,
          meta_src.metadata_tags.rights.copyright.digitization,
          meta_src.metadata_tags.rights.copyright.audio,
          meta_src.metadata_tags.rights.license,
        ]
        w << [
          meta_src.metadata_tags.classify.head,
          meta_src.metadata_tags.classify.subject,
          meta_src.metadata_tags.classify.topic_register,
          meta_src.metadata_tags.classify.loc,
          meta_src.metadata_tags.classify.dewey,
        ]
        w << [
          meta_src.metadata_tags.date.head,
          meta_src.metadata_tags.date.added_to_site,
          meta_src.metadata_tags.date.available,
          meta_src.metadata_tags.date.created,
          meta_src.metadata_tags.date.issued,
          meta_src.metadata_tags.date.modified,
          meta_src.metadata_tags.date.published,
          meta_src.metadata_tags.date.valid,
        ]
        w << [
          meta_src.processing_tags.make.language,
          meta_src.processing_tags.make.headings,
          meta_src.processing_tags.make.num_top,
          meta_src.processing_tags.make.breaks,
          meta_src.processing_tags.make.emphasis,
          meta_src.processing_tags.make.bold,
          meta_src.processing_tags.make.italics,
          meta_src.processing_tags.make.texpdf_font,
        ]
        w.each do |y|
          z=''
          y.each do |x|
            if x
              z += x + "\n" if x =~/^#|^msg(?:id|str)/
              z += %{#{x}\n} if x =~/^@\S+?:(?: |$)/
              z += %{#{x}\n} if x =~/^\s+:\S+?: /
            end
          end
          @pot[:metadata] << z << br
          #puts z unless z.empty?
        end
      end
      def pot_metadata_src_trn
        #@po4a_identify_type='type: Plain text'
        meta_src=SiSU_Metadata::Summary.new(@md_src)
        w=[]
        w << [
          meta_src.metadata_tags.title.main,
          meta_src.metadata_tags.title.sub,
          meta_src.metadata_tags.title.edition,
          meta_src.metadata_tags.title.note,
          meta_src.metadata_tags.title.short,
          meta_src.metadata_tags.title.language,
          meta_src.metadata_tags.title.language_char,
        ]
        w << [
          meta_src.metadata_tags.creator.head,
          meta_src.metadata_tags.creator.author,
          meta_src.metadata_tags.creator.contributor,
          meta_src.metadata_tags.creator.illustrator,
          meta_src.metadata_tags.creator.photographer,
          meta_src.metadata_tags.creator.translator,
          meta_src.metadata_tags.creator.audio,
          meta_src.metadata_tags.creator.digitized_by,
          meta_src.metadata_tags.creator.prepared_by,
        ]
        w << [
          meta_src.metadata_tags.rights.head,
          meta_src.metadata_tags.rights.copyright.text,
          meta_src.metadata_tags.rights.copyright.translation,
          meta_src.metadata_tags.rights.copyright.illustrations,
          meta_src.metadata_tags.rights.copyright.photographs,
          meta_src.metadata_tags.rights.copyright.digitization,
          meta_src.metadata_tags.rights.copyright.audio,
          meta_src.metadata_tags.rights.license,
        ]
        w << [
          meta_src.metadata_tags.classify.head,
          meta_src.metadata_tags.classify.subject,
          meta_src.metadata_tags.classify.topic_register,
          meta_src.metadata_tags.classify.loc,
          meta_src.metadata_tags.classify.dewey,
        ]
        w << [
          meta_src.metadata_tags.date.head,
          meta_src.metadata_tags.date.added_to_site,
          meta_src.metadata_tags.date.available,
          meta_src.metadata_tags.date.created,
          meta_src.metadata_tags.date.issued,
          meta_src.metadata_tags.date.modified,
          meta_src.metadata_tags.date.published,
          meta_src.metadata_tags.date.valid,
        ]
        w << [
          meta_src.processing_tags.make.language,
          meta_src.processing_tags.make.headings,
          meta_src.processing_tags.make.num_top,
          meta_src.processing_tags.make.breaks,
          meta_src.processing_tags.make.emphasis,
          meta_src.processing_tags.make.bold,
          meta_src.processing_tags.make.italics,
          meta_src.processing_tags.make.texpdf_font,
        ]
        w.each do |y|
          z=''
          y.each do |x|
            if x
              z += x + "\n" if x =~/^#|^msg(?:id|str)/
              z += %{#{x}\n} if x =~/^@\S+?:(?: |$)/
              z += %{#{x}\n} if x =~/^\s+:\S+?: /
            end
          end
          @pot[:metadata] << z << br
          #puts z unless z.empty?
        end
      end
      def auto_translate?(set_to=nil)
        @@auto_translation_=
        if @md.opt.act[:po4a_lang_trans][:set]==:on
          set_to \
          ? set_to
          : @@auto_translation_
        else :skip
        end
      end
      def auto_translation(src_txt,markup=:src) # check for an appropriate request flag
        auto_translate?(:skip)
        begin
          src_txt_clean=clean_text(src_txt,markup)
          src_txt_clean=src_txt_clean.
            gsub(/\n/,' ').
            gsub(/"/,'\"').
            gsub(/([()])/,'\\\\\1')
          trans=''
          unless auto_translate? == :skip
            require 'timeout'
            Timeout::timeout(60) {
              trans=`trans -b -no-ansi en:#{@md.opt.f_pth[:lng_is]} #{src_txt_clean}`.strip
              unless trans.empty?
                trans + ' {[G.Tr]}http://translate.google.com'
              end
            }
          end
          trans
        rescue
          auto_translate?(:skip)
          p 'timeout issues with translation, skip remaining'
        end
      end
      def pot_structure
        def heading(dob_src='',notes_s='',dob_trn='',notes_t='')   #% used to extract the structure of a document
          lv=n=n3=nil
          lv=dob_src.ln
          n=lv - 1
          n3=lv + 2
          util=nil
          fn=(dob_src.name=~/[a-z\d]/i) ? dob_src.name : ''
          mark="#{dob_src.lv}~#{fn} "
          orig="#{mark}#{dob_src.obj}"
          trans=((dob_trn=='') \
          || (dob_src.obj == dob_trn.obj)) \
          ? ''
          : "#{mark}#{dob_trn.obj}"
          if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
          and trans.empty? \
          and auto_translate?
            trans=auto_translation(dob_src.obj,:src)
          end
          util=pot_structure_wrap(orig,trans)
          wrapped=util.line_wrap
          @pot[:body] << wrapped << br # main text, contents, body KEEP
          if @@endnotes[:para] \
          and notes_s.length > 0 \
          and not @@endnotes_
            @pot[:body] << br
            wrap_endnotes(notes_s,notes_t)
          elsif @@endnotes[:para] \
          and @@endnotes_
            @pot[:body] << br*2
          end
        end
        def para(dob_src='',notes_s='',dob_trn='',notes_t='')      #% used to extract the structure of a document
          util=nil
          wrapped=if dob_src.indent =~/[1-9]/ \
          and dob_src.indent == dob_src.hang
            s_mark=desc=orig=trans=''
            mark=if dob_src.bullet_
              "_#{dob_src.indent}* "
            else
              "_#{dob_src.indent} "
            end
            orig="#{mark}#{dob_src.obj}"
            trans=((dob_trn=='') \
            || (dob_src.obj == dob_trn.obj)) \
            ? ''
            : "#{mark}#{dob_trn.obj}"
            if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
            and trans.empty? \
            and auto_translate?
              trans=auto_translation(dob_src.obj,:src)
            end
            util=pot_structure_wrap(orig,trans)
          elsif dob_src.hang =~/[0-9]/ \
          and dob_src.indent != dob_src.hang
            s_mark=desc=orig=trans=''
            mark="_#{dob_src.hang}_#{dob_src.indent} "
            orig="#{mark}#{dob_src.obj}"
            trans=((dob_trn=='') \
            || (dob_src.obj == dob_trn.obj)) \
            ? ''
            : "#{mark}#{dob_trn.obj}"
            if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
            and trans.empty? \
            and auto_translate?
              trans=auto_translation(dob_src.obj,:src)
            end
            util=pot_structure_wrap(orig,trans)
          else
            s_mark=desc=orig=trans=''
            if dob_src.bullet_
              mark='_* '
              orig="#{mark}#{dob_src.obj}"
              trans=((dob_trn=='') \
              || (dob_src.obj == dob_trn.obj)) \
              ? ''
              : "#{mark}#{dob_trn.obj}"
              if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
              and trans.empty? \
              and auto_translate?
                trans=auto_translation(dob_src.obj,:src)
              end
            else
              mark=''
              orig=dob_src.obj
              trans=((dob_trn=='') \
              || (dob_src.obj == dob_trn.obj)) \
              ? ''
              : "#{mark}#{dob_trn.obj}"
              if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
              and trans.empty? \
              and auto_translate?
                trans=auto_translation(dob_src.obj,:src)
              end
            end
            util=pot_structure_wrap(orig,trans)
          end
          wrapped=util.line_wrap
          @pot[:body] << wrapped << br # main text, contents, body KEEP
          if @@endnotes[:para] \
          and notes_s.length > 0 \
          and not @@endnotes_
            @pot[:body] << br
            wrap_endnotes(notes_s,notes_t)
          elsif @@endnotes[:para] \
          and @@endnotes_
            @pot[:body] << br*2
          end
        end
        def block(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark_o ="block{\n\n"
          mark_c ="\n\n}block"
          orig="#{mark_o}#{dob_src.obj}#{mark_c}"
          trans=((dob_trn=='') \
          || (dob_src.obj == dob_trn.obj)) \
          ? ''
          : "#{mark_o}#{dob_trn.obj}#{mark_c}"
          if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
          and trans.empty? \
          and auto_translate?
            trans=auto_translation(dob_src.obj,:src)
          end
          util=pot_structure_wrap(orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def group(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark_o ="group{\n\n"
          mark_c ="\n\n}group"
          orig="#{mark_o}#{dob_src.obj}#{mark_c}"
          trans=((dob_trn=='') \
          || (dob_src.obj == dob_trn.obj)) \
          ? ''
          : "#{mark_o}#{dob_trn.obj}#{mark_c}"
          if @md.opt.f_pth[:lng_is] !=@md.opt.lng_base \
          and trans.empty? \
          and auto_translate?
            trans=auto_translation(dob_src.obj,:src)
          end
          util=pot_structure_wrap(orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def verse(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark="poem{\n\nverse\n\nverse\n\n...\n\n}poem"
          instruct=s_mark=''
          if @md.opt.act[:maintenance][:set]==:on
            instruct=%{\n# verse are part of the text block described as a poem, } \
            + %{the first verse is preceeded by an opening marker, } \
            + %{and the last verse by a closing marker, } \
            + %{the content of which should remain unwrapped}
            s_mark="\n# " + %{"\\n\\n#{mark}\\n\\n"}
          end
          orig=dob_src.obj
          trans=(dob_trn=='') \
          ? ''
          : dob_trn.obj
          util=pot_structure_wrap(orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def code(dob_src='',notes_s='',dob_trn='',notes_t='')      #% used to extract the structure of a document
          mark_o ="code{\n\n"
          mark_c ="\n\n}code"
          orig="#{mark_o}#{dob_src.obj}#{mark_c}"
          trans=(dob_trn=='') \
          ? ''
          : "#{mark_o}#{dob_trn.obj}#{mark_c}"
          util=pot_structure_wrap(orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def table(dob_src='',notes_s='',dob_trn='',notes_t='')     #% used to extract the structure of a document
          mark_o ="table{\n\n"
          mark_c ="\n\n}table"
          orig="#{mark_o}#{dob_src.obj}#{mark_c}"
          orig=orig.gsub(/#{Mx[:tc_c]}/m,"\n")
          trans=(dob_trn=='') \
          ? ''
          : "#{mark_o}#{dob_trn.obj}#{mark_c}"
          trans=trans.gsub(/#{Mx[:tc_c]}/m,"\n")
          util=pot_structure_wrap(orig,trans)
          unwrapped=util.no_line_wrap_block
          @pot[:body] << unwrapped << br
        end
        def idx_markup(idx)
          struct=['={' + "\n  "]
          idx.sort.each do |x|
            x.each_with_index do |y,i0|
              case y
              when String
                unless struct[-1] =~/=\{/
                  struct << ' ;' + "\n  "
                end
                struct << y
                if x[i0+1].class == Hash \
                and x[i0+1][:sub].length > 0
                  struct << ' :' + "\n    "
                end
              when Hash
                if y[:plus].to_i > 0
                  struct << '+' + y[:plus].to_s
                end
                if y[:sub].length > 0
                  y[:sub].each_with_index do |z,i1|
                    z.each_with_index do |a,i2|
                      if z.length > 0
                        struct << a[0]
                        if a[1][:plus].to_i > 0
                          struct << '+' + a[1][:plus].to_s
                        end
                        if (i1 + 1) < y[:sub].length
                          struct << '|'
                        end
                      end
                    end
                  end
                end
              end
            end
          end
          struct << "\n" + '}'
          #puts struct.join
          struct.join
        end
        def idx(dob_src='') #% used for book index but broken as original markup lost, already abstracted, fix
          orig=pot_structure.idx_markup(dob_src.idx) #'={' + dob_src.idx + '}'
          util=pot_structure_wrap(orig,'')
          unwrapped=util.no_line_wrap_block
          if @pot[:body][-1] == "\n"
            @pot[:body][-1] = unwrapped #<< br
            @pot[:body] << br
          else # expect to catch all above, problem if wraps, must =~/^=\{/
            @pot[:body] << unwrapped << br # places idx in separate object
          end
        end
        self
      end
      def compare_structure_src_trn(data_src,data_trn,todo)
        #@endnotes,@copen,@pot_contents_close=Array.new(3){[]}
        a_l= data_src.length
        s,t=0,0
        0.upto(a_l-1) do |i|
          if todo==:compare
            unless data_src[s] \
            and data_trn[t]
              break
            end
            if data_src[s].of == :comment \
            and data_trn[t].of == :comment \
            and (data_src[s].is == data_trn[t].is)
              s+=1;t+=1
              next
            end
            if ((data_src[s].is == :comment) \
            || (data_trn[t].is == :comment)) \
            and (data_src[s].is != data_trn[t].is)
              if data_src[s].is == :comment
                if @md.opt.act[:maintenance][:set]==:on
                  puts "src (comment):\n\t" \
                  + data_src[s].obj
                end
                s+=1
                #next if data_src[s].is == :comment
              elsif data_trn[t].is == :comment
                if @md.opt.act[:maintenance][:set]==:on
                  puts "trans (comment):\n\t" \
                  + data_trn[t].obj
                end
                t+=1
                #next if data_trn[t].is == :comment
              end
            end
            if ((defined? data_src[s].ocn) \
            && (data_src[s].ocn.is_a?(Fixnum))) \
            and ((defined? data_trn[t].ocn) \
            && (data_trn[t].ocn.is_a?(Fixnum))) \
            and (data_src[s].ocn == data_trn[t].ocn)
              @m_s,@m_t=s,t
            elsif ((defined? data_src[s].ocn) \
            && (data_src[s].ocn.is_a?(Fixnum))) \
            and ((defined? data_trn[t].ocn) \
            && (data_trn[t].ocn.is_a?(Fixnum))) \
            and (data_src[s].ocn != data_trn[t].ocn)
              p '--- OCN ---'
              p 'mis-match'
              p data_src[s].ocn if defined? data_src[s].ocn
              p data_src[s].obj if defined? data_src[s].obj
              p data_trn[t].ocn if defined? data_trn[t].ocn
              p data_trn[t].obj if defined? data_trn[t].obj
              p '---'
              p 'previous match'
              p data_src[@m_s].ocn if defined? data_src[@m_s].ocn
              p data_src[@m_s].obj if defined? data_src[@m_s].obj
              p data_trn[@m_t].ocn if defined? data_trn[@m_t].ocn
              p data_trn[@m_t].obj if defined? data_trn[@m_s].obj
              exit
            elsif (((defined? data_src[s].ocn) \
            && (defined? data_trn[t].ocn)) \
            and data_src[s].ocn.class != data_trn[t].ocn.class)
              p '--- OCN class ---'
              p 'mis-match'
              p data_src[s].ocn if defined? data_src[s].ocn
              p data_src[s].obj if defined? data_src[s].obj
              p data_trn[t].ocn if defined? data_trn[t].ocn
              p data_trn[t].obj if defined? data_trn[t].obj
              #p '---'
              #p 'previous match'
              #p data_src[@m_s].ocn
              #p data_src[@m_s].obj
              #p data_trn[@m_t].ocn
              #p data_trn[@m_t].obj
            #elsif (defined? data_src[s].ocn != defined? data_trn[t].ocn) \
            #and (data_src[s].ocn.nil? != data_trn[t].ocn.nil?)
            #  p '--- missing OCN? ---'
            #  p 'mis-match'
            #  p data_src[s].ocn if defined? data_src[s].ocn
            #  p data_src[s].obj
            #  p data_trn[t].ocn if defined? data_trn[t].ocn
            #  p data_trn[t].obj
            else
            end
          end
          notes_s=''
          data_src[s],notes_s=markup(data_src[s])
          data_src[s],nul=pot_data(data_src[s],notes_s)
          s+=1;t+=1
        end
        @pot #watch
      end
      def pot_data(dob_src='',notes_s)
        if dob_src.obj !~/(^#{Rx[:meta]}|#{Mx[:br_eof]}|#{Mx[:br_endnotes]})/
          if defined? dob_src.ocn \
          and dob_src.ocn.to_s =~/\d+/
            paranum=dob_src.ocn.to_s
            @p_num=SiSU_Po4aUtils::ParagraphNumber.new(paranum)
          end
          case dob_src.is
          when :heading
            pot_structure.heading(dob_src,notes_s)
          when :para
            pot_structure.para(dob_src,notes_s)
          when :group
            pot_structure.group(dob_src,notes_s)
          when :block
            pot_structure.block(dob_src,notes_s)
          when :verse
            pot_structure.verse(dob_src,notes_s)
          when :code
            pot_structure.code(dob_src,notes_s)
          when :table
            pot_structure.table(dob_src,notes_s)
          end
          if defined? dob_src.idx \
          and not dob_src.idx.nil? \
          and not dob_src.idx.empty?
            pot_structure.idx(dob_src)
          end
          #if dob_src ## Clean Prepared Text
          #  dob_src.obj=dob_src.obj.gsub(/<!.+!>/,' ').
          #    gsub(/<:\S+>/,' ') if dob_src ## Clean Prepared Text
          #end
        end
        #[dob_src,dob_trn]
      end
      def markup(dob)
        dob,notes=objects.textface_marks_po4a(dob,:separate)
        [dob,notes]
      end
      def publish(fn,pot)
        content=[]
        content << pot[:open]
        content << pot[:head]
        content << pot[:metadata]
        content << pot[:body]
        content << @@endnotes[:end] if @@endnotes_
        Output.new(fn,content,@md,@process).po4a
        @@endnotes={ para: [], end: [] }
      end
    end
    class Output <Source
      include SiSU_Param
      include SiSU_Env
      def initialize(fn,content,md,process=:complete)
        @fn,@content,@md,@process=fn,content,md,process
        @file=SiSU_Env::FileOp.new(md,fn)
      end
      def po4a                                                                 #%pot output
        file_pot=@file.write_file.po4a_sst
        #file_pot=(@md.opt.f_pth[:lng] == @md.opt.lng_base) \
        #? @file.write_file.pot
        #: @file.write_file.po
        @sisu=[]
        emptyline=0
        @content.each do |para|                                                # this is a hack
          if para.is_a?(Array) \
          and para.length > 0
            para.each do |line|
              if line
                line=line.gsub(/\s+$/m,'').
                  gsub(/^\A[ ]*\Z/m,'')
                if line=~/^\A[ ]*\Z/m
                  emptyline+=1
                else emptyline=0
                end
                file_pot.puts line if emptyline < 2                     #remove extra line spaces (fix upstream)
              end
            end
          else file_pot.puts para          #unix plaintext # /^([*=-]|\.){5}/
          end
        end
        file_pot.close
        SiSU_Po4aUtils::PotNumber.new.reset
        #po4a_git
      end
      def po4a_git
        unless @md.opt.act[:maintenance][:set]==:on
          require_relative 'git'                           # git.rb
          git=SiSU_Git::Source.new(@md.opt,@process)
          unless FileTest.directory?(@file.output_path.pot_git.dir)
            git.create_file_structure_git
          end
          if @md.opt.f_pth[:lng] == @md.opt.lng_base
            FileUtils::cp(
              @file.place_file.pot.dir,
              @file.output_path.pot_git.dir
            )
          else # naive, work on -->
            FileUtils::cp(
              @file.place_file.po.dir,
              @file.output_path.po_git.dir
            ) #unless FileTest.file?(@file.place_file.po_git.dir)
          end
          git.read
        end
      end
    end
  end
end
__END__
REMOVE
&#033;\|&#035;\|&&#042;\|&#045;\|&#047;\|&#095;\|&#123;\|&#125;\|&#126;\|&#

tables are problematic, difficult to reconstitute instruction, check

metadata, move to top? and work on

footnotes, different types, asterisk, also do you want to have separate
paragraphs, or breaks within one block?

where no ocn appropriately use ~# or -# or indeed 1~name-

comments in document, what to do about them, not sure they are currently
retained in dal, could be quite valuable to keep

Translate Shell
http://www.soimort.org/translate-shell/
translate.google.com
#+END_SRC

* src_po4a_sst_ao_sst_set.rb

#+HEADER: :tangle "../lib/sisu/src_po4a_sst_ao_sst_set.rb"
#+BEGIN_SRC ruby
#<<sisu_document_header>>
module SiSU_Po4aUtils
  class Wrap
    def initialize(md,orig='',trans='',n_char_max=76,n_indent=0,n_hang=nil)
      @md,@orig,@trans,@n_char_max,@n_indent=
       md, orig, trans, n_char_max, n_indent
      @n_char_max_extend = n_char_max
      @br="\n"
      @n_hang=n_hang ? n_hang : @n_indent
      @po4a_identify_type='type: SiSU doc'
      #@po4a_identify_type='type: Plain text'
    end
    def line_wrap
      space=' '
      spaces_indent,spaces_hang=
        "#{@br}#{space*@n_indent}",space*@n_hang
      pot,i=[],0
      pot_array=(@trans.empty?) ? [@orig] : [@orig,@trans]
      pot_array.each do |pa|
        line=0
        out=[]
        out[line]=''
        @oldword='' #REMOVE @oldword
        pa=pa.gsub(/<br>/,' <br> ').
          gsub(/#{Mx[:br_nl]}/,"\n\n")
        words=pa.scan(/\n\n|\\\\\\|<br>|\S+/m)
        while words != ''
          word=words.shift
          if not word
            out[line] unless out[line].empty? #check
            break
          elsif word =~/\n\n/
            word="\n"
            @n_char_max_extend = @n_char_max + out[line].length
            line=line
          elsif (out[line].length + word.length) > (@n_char_max_extend - @n_indent) \
          and out[line] =~/\S+/
            @n_char_max_extend = @n_char_max
            out[line].squeeze!(' ')
            line += 1
          end
          if word
            out[line]=if out[line] \
            and out[line] !~/\S+$/m
              "#{out[line]}#{word}"
            elsif out[line] \
            and out[line] =~/\S+/
              "#{out[line]} #{word}"
            else "#{word.strip}"
            end
          end
          @oldword=word if word =~/\S+/
        end
        x=out.join(spaces_indent).gsub(/\A\n+/m,'').insert(0,spaces_hang)
        z=[]
        x.split(/\n/).each do |y|
          z << y
        end
        pot[i]=z.join("\n")
        i +=1
        pot
      end
      trans=(pot.length == 2) ? pot[1] : ''
      po_str=<<WOK
#{pot[0]}
WOK
#{trans}
      po_str
    end
    def no_line_wrap_block
      pot,i=[],0
      pot_array=(@trans.empty?) ? [@orig] : [@orig,@trans]
      pot_array.each do |pa|
        z=[]
        pa.split(/\n\n/).each do |y|
          z << y if not y.empty?
        end
        pot[i]=z.join("\n")
        i +=1
        pot
      end
      trans=(pot.length == 2) ? pot[1] : ''
      po_str=<<WOK
#{pot[0]}
WOK
#{trans}
      po_str
    end
    def line_wrap_indent1
      @n_indent,@n_hang=2,2
      line_wrap
    end
    def line_wrap_endnote
      @n_indent,@n_hang=4,2
      line_wrap
    end
    def array_wrap
      if @orig.is_a?(Array)
        @arr=[]
        @orig.each do |line|
          @arr << SiSU_TextUtils::Wrap.new(line,@n_char_max,@n_indent,@n_hang).line_wrap
        end
      end
      @arr
    end
  end
  class HeaderScan
    def initialize(md,para)
      @md,@p=md,para
    end
    def extract(tag,tag_content,type,attrib)
      if dc_tag \
      and dc_content
        [dc_tag,dc_content,{dc_tag=>dc_content}]
      else nil
      end
    end
    def header(tag,tag_content,type='',attrib='') #this will break stuff and must be tested thoroughly 20060825
      @tag,@tag_content,@type,@attrib=tag,tag_content,type,attrib
      def label #element
        @tag
      end
      def type
        @type
      end
      def text
        @tag_content
      end
      def info  #element text
        @tag_content
      end
      def attribute
        @attrib
      end
      def element
        @tag
      end
      def attrib
        @attrib
      end
      def el
        @tag
      end
      self
    end
    def start_is_match
      case @p
      when /^#{Mx[:meta_o]}(title)#{Mx[:meta_c]}\s*(.+?)$/                      then header($1,@md.title.full,'meta','dc') #dc 1
      when /^#{Mx[:meta_o]}(creator|author)#{Mx[:meta_c]}\s*(.+?)$/             then header('creator',$2,'meta','dc')    #dc 2
      when /^#{Mx[:meta_o]}(subject)#{Mx[:meta_c]}\s*(.+?)$/                    then header($1,$2,'meta','dc')           #dc 3
      when /^#{Mx[:meta_o]}(description)#{Mx[:meta_c]}\s*(.+?)$/                then header($1,$2,'meta','dc')           #dc 4
      when /^#{Mx[:meta_o]}(publisher)#{Mx[:meta_c]}\s*(.+?)$/                  then header($1,$2,'meta','dc')           #dc 5
      when /^#{Mx[:meta_o]}(contributor)#{Mx[:meta_c]}\s*(.+?)$/                then header($1,$2,'meta','dc')           #dc 6
      when /^#{Mx[:meta_o]}(date)#{Mx[:meta_c]}\s*(.+?)$/                       then header($1,$2,'meta','dc')           #dc 7
      when /^#{Mx[:meta_o]}(date\.created)#{Mx[:meta_c]}\s*(.+?)$/              then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(date\.issued)#{Mx[:meta_c]}\s*(.+?)$/               then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(date\.available)#{Mx[:meta_c]}\s*(.+?)$/            then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(date\.valid)#{Mx[:meta_c]}\s*(.+?)$/                then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(date\.modified)#{Mx[:meta_c]}\s*(.+?)$/             then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(type)#{Mx[:meta_c]}\s*(.+?)$/                       then header($1,$2,'meta','dc')           #dc 8
      when /^#{Mx[:meta_o]}(format)#{Mx[:meta_c]}\s*(.+?)$/                     then header($1,$2,'meta','dc')           #dc 9
      when /^#{Mx[:meta_o]}(identifier)#{Mx[:meta_c]}\s*(.+?)$/                 then header($1,$2,'meta','dc')           #dc 10
      when /^#{Mx[:meta_o]}(source)#{Mx[:meta_c]}\s*(.+?)$/                     then header($1,$2,'meta','dc')           #dc 11
      when /^#{Mx[:meta_o]}(language)#{Mx[:meta_c]}\s*(.+?)$/                   then header($1,$2,'meta','dc')           #dc 12
      when /^#{Mx[:meta_o]}(relation)#{Mx[:meta_c]}\s*(.+?)$/                   then header($1,$2,'meta','dc')           #dc 13
      when /^#{Mx[:meta_o]}(coverage)#{Mx[:meta_c]}\s*(.+?)$/                   then header($1,$2,'meta','dc')           #dc 14
      when /^#{Mx[:meta_o]}(rights)#{Mx[:meta_c]}\s*(.+?)$/                     then header($1,$2,'meta','dc')           #dc 15
      when /^#{Mx[:meta_o]}(keywords)#{Mx[:meta_c]}\s*(.+?)$/                   then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(copyright)#{Mx[:meta_c]}\s*(.+?)$/                  then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(translator|translated_by)#{Mx[:meta_c]}\s*(.+?)$/   then header('translator',$2)
      when /^#{Mx[:meta_o]}(illustrator|illustrated_by)#{Mx[:meta_c]}\s*(.+?)$/ then header('illustrator',$2)
      when /^#{Mx[:meta_o]}(prepared_by)#{Mx[:meta_c]}\s*(.+?)$/                then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(digitized_by)#{Mx[:meta_c]}\s*(.+?)$/               then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(comments?)#{Mx[:meta_c]}\s*(.+?)$/                  then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(abstract)#{Mx[:meta_c]}\s*(.+?)$/                   then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(tags?)#{Mx[:meta_c]}\s*(.+?)$/                      then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(catalogue)#{Mx[:meta_c]}\s*(.+?)$/                  then header($1,$2,'meta','extra')
      when /^#{Mx[:meta_o]}(class(?:ify)?_loc)#{Mx[:meta_c]}\s*(.+?)$/          then header('classify_loc',$2,'meta','extra')
      when /^#{Mx[:meta_o]}(class(?:ify)?_dewey)#{Mx[:meta_c]}\s*(.+?)$/        then header('classify_dewey',$2,'meta','extra')
      when /^#{Mx[:meta_o]}(class(?:ify)?_pg)#{Mx[:meta_c]}\s*(.+?)$/           then header('classify_pg',$2,'meta','extra')
      when /^#{Mx[:meta_o]}(class(?:ify)?_isbn)#{Mx[:meta_c]}\s*(.+?)$/         then header('classify_isbn',$2,'meta','extra')
      when /^#{Mx[:meta_o]}(toc|structure)#{Mx[:meta_c]}\s*(.+?)$/              then header('structure',$2,'process','instruct')
      when /^#{Mx[:meta_o]}(level|page|markup)#{Mx[:meta_c]}\s*(.+?)$/          then header('markup',$2,'process','instruct')
      when /^#{Mx[:meta_o]}(bold)#{Mx[:meta_c]}\s*(.+?)$/                       then header($1,$2,'process','instruct')
      when /^#{Mx[:meta_o]}(italics|itali[sz]e)#{Mx[:meta_c]}\s*(.+?)$/         then header('italicize',$2,'process','instruct')
      when /^#{Mx[:meta_o]}(vocabulary|wordlist)#{Mx[:meta_c]}\s*(.+?)$/        then header('vocabulary',$2,'process','instruct')
      when /^#{Mx[:meta_o]}(css|stylesheet)#{Mx[:meta_c]}\s*(.+?)$/             then header('css',$2,'process','instruct')
      when /^#{Mx[:meta_o]}(links)#{Mx[:meta_c]}\s*(.+?)$/                      then header($1,$2,'process','instruct')
      when /^#{Mx[:meta_o]}(prefix)#{Mx[:meta_c]}\s*(.+?)$/                     then header($1,$2,'process','instruct') #add a & b
      when /^#{Mx[:meta_o]}(suffix)#{Mx[:meta_c]}\s*(.+?)$/                     then header($1,$2,'process','instruct')
      when /^#{Mx[:meta_o]}(information)#{Mx[:meta_c]}\s*(.+?)$/                then header($1,$2,'process','instruct')
      when /^#{Mx[:meta_o]}(contact)#{Mx[:meta_c]}\s*(.+?)$/                    then header($1,$2,'process','instruct')
      when /^#{Mx[:meta_o]}(rcs|cvs)#{Mx[:meta_c]}\s*(.+?)$/                    then header('version',$2,'process','instruct')
      else nil
      end
    end
    def dublin
      (@p =~/^#{Mx[:meta_o]}\S+?#{Mx[:meta_c]}/) \
      ? start_is_match
      : nil
    end
    def meta
      (@p =~/^#{Mx[:meta_o]}\S+?#{Mx[:meta_c]}/) \
      ? start_is_match
      : nil
    end
  end
  class ParagraphNumber
    def initialize(paranum)
      @paranum=/(\d+)/m.match(paranum)[1]
    end
    def display
      @paranum.gsub(/(\d+)/,'#\1')
    end
  end
  class PotNumber
    @@n=0
    def initialize
      @@n +=2
    end
    def num
      @@n
    end
    def reset
      @@n=0
    end
  end
end
__END__
#+END_SRC

* src_po4a_sstm.rb

#+HEADER: :tangle "../lib/sisu/src_po4a_sstm.rb"
#+BEGIN_SRC ruby
#<<sisu_document_header>>
module SiSU_Markup
  require_relative 'src_shared'                         # src_shared.rb
    include SiSU_Source
  require_relative 'src_po4a_share'                     # src_po4a_share.rb
  require_relative 'se'                                 # se.rb
    include SiSU_Env
  class Source_Po4a < SiSU_Source::SiSUpodSource
    def initialize(opt,build=nil,place=nil)
      super(opt,build,place)
      @opt=opt
      md=SiSU_Param::Parameters.new(opt).get
      @file=SiSU_Env::FileOp.new(md,opt.fno)
    end
    def dir_mk(dir)
      unless FileTest.directory?(dir)
        FileUtils::mkdir_p(dir)
      end
    end
    def make_paths
      dir_mk(@file.output_path.pot.dir)
      dir_mk(@file.output_path.po.dir)
    end
    def language
      def source_language_selected_str
        @opt.act[:po4a_lang][:src] \
        ? @opt.act[:po4a_lang][:src]
        : 'en'
      end
      self
    end
    def read
      unless @opt.act[:quiet][:set]==:on
        (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        ? SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'Share document markup text source',
            @opt.fns
          ).cyan_hi_blue
        : SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'Share document markup text source',
            @opt.fns
          ).cyan_title_hi
      end
      make_paths
      if FileTest.directory?(@path_pod[:fnb])
        FileUtils::mkdir_p(@file.output_path.src.dir) \
          unless FileTest.directory?(@file.output_path.src.dir)
        v=(@opt.act[:maintenance][:set]==:on) \
        ? 'v' : ''
        system(%{
          #rsync -a#{v} #{@path_pod[:fnb]}/sisupod/doc/* #{@file.output_path.po4a.dir}
          rsync -a#{v} #{@path_pod[:fnb]}/sisupod/doc/#{language.source_language_selected_str}* #{@file.output_path.po4a.dir}
          chbk=`pwd`
          cd #{@file.output_path.sisupod.dir}
          for I in `find -type d` ; do chmod 755 $I ; done
          for I in `find -type f` ; do chmod 644 $I ; done
          cd ${chbk}
        })
        md=SiSU_Param::Parameters.new(@opt).get
        file=SiSU_Env::FileOp.new(md)
        SiSU_Po4a_Project::Po4aCfg.new(@opt,file).song
        SiSU_Po4a_Project::Po4aProject.new(@opt,file).song
      else
        if (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on)
          SiSU_Screen::Ansi.new(
            '',
            "#{@opt.fno} not available"
          ).blue_tab
        end
      end
    end
  end
end
__END__
#+END_SRC

* src_shared.rb

#+HEADER: :tangle "../lib/sisu/src_shared.rb"
#+BEGIN_SRC ruby
#<<sisu_document_header>>
module SiSU_Source
  include SiSU_Env
  class SiSUpodSource
    require_relative 'se'                               # se.rb
    require_relative 'se_hub_particulars'               # se_hub_particulars.rb
    require_relative 'utils_composite'                  # utils_composite.rb
    include SiSU_Composite_Doc_Utils                    # composite doc, .ssm, extract all related insert files, array of filenames test
    def initialize(opt,build=nil,place=nil)
      @opt=opt
      @date=SiSU_Env::InfoDate.new.dt
      @env=SiSU_Env::InfoEnv.new(opt.fns)
      #@ver=SiSU_Env::InfoVersion.instance.get_version
      @v=(@opt.act[:verbose_plus][:set]==:on \
      || @opt.act[:maintenance][:set]==:on) \
      ? 'v' : ''
      @particulars=SiSU_Particulars::CombinedSingleton.instance.get_all(opt)
      @file=@particulars.file
      @local_path="#{@file.output_path.sisupod.dir}"
      processing_sisupod=@env.processing_path.processing_sisupod(opt)
      processing_sisupod.make
      path_pod=processing_sisupod.paths[:sisupod]
      path_pod_fnb=processing_sisupod.paths[:fnb]
      FileUtils::mkdir_p(path_pod) unless FileTest.directory?(path_pod)
      @path_pod={
        fnb:       path_pod_fnb,
        pod:       path_pod,
        doc:       path_pod + '/' + Gt[:doc] + '/' + opt.lng,
        po:        path_pod + '/' + Gt[:po]  + '/' + opt.lng,
        pot:       path_pod + '/' + Gt[:pot],
        conf:      path_pod + '/' + Gt[:conf],
        image:     path_pod + '/' + Gt[:image],
        audio:     path_pod + '/' + Gt[:audio],
        video:     path_pod + '/' + Gt[:video],
      }
    end
    def read
      unless @opt.act[:quiet][:set]==:on
        (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        ? SiSU_Screen::Ansi.new(
          @opt.act[:color_state][:set],
          'Assemble SiSU source',
          "[#{@opt.f_pth[:lng_is]}] #{@opt.fno}").
          green_hi_blue
        : ''
      end
      unless @opt.fns.empty?
        directories
        doc_import_list=composite_and_imported_filenames_array(@opt.fno)
        doc_import_list=[@opt.fno, doc_import_list].flatten
        image_extraction(doc_import_list)
        language_versions
      end
    end
    def images_extract(f,images)                                                # consider using param info
      rgx_image=/(?:^|[^_\\])\{(?:\s*|\~\^\s+)(\S+?\.(?:png|jpg|gif)\b)/m
      if f !~/^%+\s/ \
      and f =~rgx_image
        images << f.scan(rgx_image).uniq
      end
      images.flatten
    end
    def image_extraction(doc_import_list)
      @rgx_rb_image=/["']\S*?([a-zA-Z0-9_-]+?\.(?:png|jpg|gif))["']/
      @rgx_image=/(?:^|[^_\\])\{\s*(\S+?\.(?:png|jpg|gif))/
      doc_import_dir=@opt.sub_location
      images=[]
      if doc_import_list.length > 0
        doc_import_list=doc_import_list.uniq.flatten
        doc_import_list.each do |fn|
          file_array=IO.readlines(fn,'')
          file_array.each do |f|                                               #% work area
            f=f.gsub(/<:=(\S+?)>/,'{ c_\1.png 14x14 }image')                   # embedded symbol (image)
            if f !~/^%+\s/ \
            and f =~@rgx_image
              images=images_extract(f,images)
            end
          end
        end
      end
      gi=SiSU_Env::GetInit.new
      unless FileTest.file?("#{@path_pod[:conf]}/#{gi.makefile_name}")
        if gi.makefile \
        && FileTest.file?(gi.makefile)
          FileUtils::mkdir_p(@path_pod[:conf]) \
            unless FileTest.directory?(@path_pod[:conf])
          FileUtils::cp(gi.makefile,"#{@path_pod[:conf]}/#{gi.makefile_name}")
        end
        #get images from makefile, consider placing in param
      end
      if images \
      and images.length > 1
        images=images.flatten.uniq
        images.delete_if {|x| x =~/https?:\/\// }
        #images=images.sort
        FileUtils::mkdir_p(@path_pod[:image])
        images_pwd=@opt.image_src_path
        ##sequence copies base images, defaults used in all html outputs
          #image_source_base='/usr/share/sisu/image'
          #dir_pwd=Dir.pwd
          #Dir.chdir(image_source_base)
          #base_images=Dir.glob('*')
          #base_images.each do |i|
          #  FileUtils::cp_r(i,"#{images_path_pod}/#{i}")
          #end
          #Dir.chdir(dir_pwd)
        if FileTest.directory?(images_pwd)
          images=images.uniq
          images.each do |i|
            if FileTest.file?("#{images_pwd}/#{i}")
              FileUtils::cp(
                "#{images_pwd}/#{i}",
                "#{@path_pod[:image]}/#{i}"
              )
            else
              STDERR.puts \
                %{\t*WARN* did not find image - } \
                + %{"#{images_pwd}/#{i}" } \
                + %{[#{__FILE__}:#{__LINE__}]}
            end
          end
        else
          STDERR.puts \
            %{\t*WARN* did not find - } \
            + %{#{images_pwd} #{@path_pod[:image]} } \
            + %{[#{__FILE__}:#{__LINE__}]}
        end
      end
      if doc_import_list.length > 0 \
      and @opt.fno =~/\.ssm$/
        doc_import_list.each do |f|
          if FileTest.file?("#{@opt.base_path}#{doc_import_dir}/#{f}")
            FileUtils::cp(
              "#{@opt.base_path}#{doc_import_dir}/#{f}",
              "#{@path_pod[:doc]}/#{f}"
            )
          else
            STDERR.puts \
              %{\t*WARN* did not find image - } \
              + %{"#{@opt.base_path}#{doc_import_dir}/#{f}" } \
              + %{[#{__FILE__}:#{__LINE__}]}
          end
        end
      end
    end
    def language_versions
      x=@env.document_language_versions_found                                  #check multiple document language versions (param not used)
      doc_import_dir=@opt.sub_location
      if x[:f] \
      and x[:f].length > 0                                                     #store multiple document language versions, sisupod
        x[:f].each do |f|
          FileUtils::mkdir_p(@path_pod[:doc]) \
            unless FileTest.directory?(@path_pod[:doc])
          if f[:f] =~/\~(\S{2,3})\.ss[tm]$/
            lng_f=$1
            if @opt.lng == lng_f
              if @opt.fno =~/\.ssm$/
                if FileTest.file?("#{@opt.base_path}#{doc_import_dir}/#{f[:f]}")
                  FileUtils::cp(
                    "#{@opt.base_path}#{doc_import_dir}/#{f[:f]}",
                    "#{@path_pod[:doc]}/#{f[:n]}"
                  )
                else
                  STDERR.puts \
                    %{\t*WARN* did not find - } \
                    + %{"#{@opt.base_path}#{doc_import_dir}/#{f[:f]}" } \
                    + %{[#{__FILE__}:#{__LINE__}]}
                end
              else
                if FileTest.file?("#{@opt.base_path}/#{f[:f]}")
                  cpy= :no
                  cpy=if f[:f] =~ /^#{@opt.f_pth[:lng_is]}\// \
                  or f[:f] =~ /~#{@opt.f_pth[:lng_is]}\.sst/
                    :yes
                  elsif f[:f] !~ /^(?:#{Px[:lng_lst_rgx]})\/|~(?:#{Px[:lng_lst_rgx]})\.sst/ \
                  and @opt.f_pth[:lng_is] == 'en'
                    :yes
                  else :no
                  end
                  if cpy == :yes
                    FileUtils::cp(
                      "#{@opt.base_path}/#{f[:f]}",
                      "#{@path_pod[:doc]}/#{f[:n]}"
                    )
                  end
                else
                  STDERR.puts \
                    %{\t*WARN* did not find - } \
                    + %{"#{@opt.base_path}/#{f[:f]}" } \
                    + %{[#{__FILE__}:#{__LINE__}]}
                end
              end
            end
          else
            if @opt.fno =~/\.ssm$/
              if FileTest.file?("#{@opt.base_path}#{doc_import_dir}/#{f[:f]}")
                FileUtils::cp_r(
                  "#{@opt.base_path}#{doc_import_dir}/#{f[:f]}",
                  "#{@path_pod[:doc]}/#{f[:n]}"
                )
              else
                STDERR.puts \
                  %{\t*WARN* did not find - } \
                  + %{"#{@opt.base_path}#{doc_import_dir}/#{f[:f]}" } \
                  + %{[#{__FILE__}:#{__LINE__}]}
              end
            else
              if FileTest.file?("#{@opt.base_path}#{doc_import_dir}/#{f[:f]}")
                cpy= :no
                cpy=if f[:f] =~ /^#{@opt.f_pth[:lng_is]}\// \
                or f[:f] =~ /~#{@opt.f_pth[:lng_is]}\.sst/
                  :yes
                elsif f[:f] !~ /^(?:#{Px[:lng_lst_rgx]})\/|~(?:#{Px[:lng_lst_rgx]})\.sst/ \
                and @opt.f_pth[:lng_is] == 'en'
                  :yes
                else :no
                end
                if cpy == :yes
                  FileUtils::cp(
                    "#{@opt.base_path}#{doc_import_dir}/#{f[:f]}",
                    "#{@path_pod[:doc]}/#{f[:n]}"
                  )
                end
              else
                STDERR.puts \
                  %{\t*WARN* did not find - } \
                  + %{"#{@opt.base_path}#{doc_import_dir}/#{f[:f]}" } \
                  + %{[#{__FILE__}:#{__LINE__}]}
              end
            end
          end
        end
      end #NB not all possibilies met, revisit, also in case of composite file may wish to add README
    end
    def directories
      SiSU_Env::InfoEnv.new.sisupod_v4(@opt)
    end
  end
end
__END__
question?:                   should you permit the packing of multiple documents in single .xz ?

  open @opt.fns, parse file
    extract from file content:
      images and copy each image from whatever image source to _sisu/sisupod/sisu/_sisu/image

   remove previously existing contents of _/sisu/sisupod &
   make directory structure:

v3 -->
   _sisu
     sisupod
       doc
         manifest.txt
         en/content.sst                [file content]
         fr/content.sst
         _sisu
           conf
           image (ln -s ../../image)
           audio (ln -s ../../audio)
           video (ln -s ../../video)
       image                           [all images for specific document gathered here]
       audio
       video

v2 -->
   _sisu
     sisupod
       content.sst                     [file content]
       filename.sst                    [link to content.sst]
       _sisu/
         image/                        [all images for specific document gathered here]

sisu
  _sisu
    sisurc.yml
    convert/
    standard_terms/
    image
    processing
      ao/
      tex/
      texinfo/
      tune/
    sisupod

special case

composite file (master), e.g.
SiSU.ssm
#+END_SRC

* document header

#+NAME: sisu_document_header
#+BEGIN_SRC text
encoding: utf-8
- Name: SiSU

  - Description: documents, structuring, processing, publishing, search
    src

  - Author: Ralph Amissah
    <ralph.amissah@gmail.com>

  - Copyright: (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
    2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2019,
    2020, 2021, Ralph Amissah,
    All Rights Reserved.

  - License: GPL 3 or later:

    SiSU, a framework for document structuring, publishing and search

    Copyright (C) Ralph Amissah

    This program is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the Free
    Software Foundation, either version 3 of the License, or (at your option)
    any later version.

    This program is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
    more details.

    You should have received a copy of the GNU General Public License along with
    this program. If not, see <http://www.gnu.org/licenses/>.

    If you have Internet connection, the latest version of the GPL should be
    available at these locations:
    <http://www.fsf.org/licensing/licenses/gpl.html>
    <http://www.gnu.org/licenses/gpl.html>

    <http://www.sisudoc.org/sisu/en/manifest/gpl.fsf.html>

  - SiSU uses:
    - Standard SiSU markup syntax,
    - Standard SiSU meta-markup syntax, and the
    - Standard SiSU object citation numbering and system

  - Homepages:
    <http://www.sisudoc.org>

  - Git
    <https://git.sisudoc.org/projects/>
    <https://git.sisudoc.org/projects/?p=software/sisu.git;a=summary>
    <https://git.sisudoc.org/projects/?p=markup/sisu-markup-samples.git;a=summary>
#+END_SRC
