-*- mode: org -*-
#+TITLE:       sisu texinfo
#+DESCRIPTION: documents - structuring, various output representations & search
#+FILETAGS:    :sisu:texinfo:
:wqa
#+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

* texinfo.rb

#+BEGIN_SRC ruby  :tangle "../lib/sisu/texinfo.rb"
<<sisu_document_header>>
module SiSU_TexInfo
  require_relative 'html'                               # html.rb
  require_relative 'dp'                                 # dp.rb
    include SiSU_Param
  #include Stamp ... needed removed arbitrarily 2005w05/1 (warnings about undefined flags)
  require_relative 'texinfo_format'                     # texinfo_format.rb
  include SiSU_TexInfoFormat
  @tex_file=[]
  @@tabular="{tabular}"
  @@table_pagebreak_counter,@@tex_endnote_call_counter,@@tex_table_flag,@@tex_counter,@@tex_column,@@tex_columns,@@counting=0,0,0,0,0,0,0
  @@column_instruct,@@tex_line_mode,@@tex_word_mode,@@start_table,@@line_mode='','','','',''
  @@n,@@copyright,@@tableheader=nil,nil,nil
  @@tex_col_w=[]
  @@tex_pattern_margin_number="\\\\marginpar.+?\s+"
  class Source
    include SiSU_Param
    include SiSU_TexInfo
    def initialize(opt)
      @opt=opt
      @md=SiSU_Param::Parameters.new(@opt).get
      @env=SiSU_Env::InfoEnv.new(@opt.fns)
    end
    def directories
      begin
        case @opt.fns
        when /\.(?:-|ssm\.)?sst$/
          Dir.mkdir(@env.path.output) unless FileTest.directory?("#{@env.path.output}")
          Dir.mkdir(@env.processing_path.texi) unless FileTest.directory?(@env.processing_path.texi)
        end
      rescue
        SiSU_Screen::Ansi.new(opt,$!,$@).rescue do
          __LINE__.to_s + ':' + __FILE__
        end
      ensure
      end
    end
    def read
      begin
        song
      ensure
        Dir.chdir(@opt.f_pth[:pth])
      end
    end
    def song
      begin
        tool=(@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        ? "cd #{@md.file.output_path.texinfo.dir} && #{@env.program.texinfo} #{@md.file.base_filename.info}; cd -"
        : "[#{@opt.f_pth[:lng_is]}] #{@opt.fno}"
        (@opt.act[:verbose][:set]==:on \
        || @opt.act[:verbose_plus][:set]==:on \
        || @opt.act[:maintenance][:set]==:on) \
        && ! @opt.act[:quiet][:set]==:on \
        ? SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'TexInfo',
            tool
          ).green_hi_blue
        : SiSU_Screen::Ansi.new(
            @opt.act[:color_state][:set],
            'TexInfo',
            tool
          ).green_title_hi
        @md=SiSU_Param::Parameters.new(@opt).get
        directories
        @marshalfile=SiSU_Env::InfoFile.new(@opt.fns).marshal.ao_content
        if FileTest.file?(@marshalfile)==true
          File.open(@marshalfile) { |f| @@tuned_file=Marshal.load(f)}
          #tell.meta_verse_skipped if @opt.selections.str =~/[vVM]/
        else
          tex_array=IO.readlines(@opt.fns,'')
          SiSU_Metaverse.songsheet(tex_array)
        end
        tex_array=@@tuned_file
        TeXinfoMake.new(@md,tex_array).songsheet
        tex_array=''
      rescue; STDERR.puts SiSU_Screen::Ansi.new(@opt.act[:color_state][:set],$!,$@).rescue
      ensure
      end
    end
  end
  class TeXinfoMake
    include SiSU_Param
    include SiSU_TexInfoFormat
    @@tex_1='(?:.+?)+~' #?? debug
    @@tabular="{tabular}"
    @@tex_pattern_margin_number="\\\\marginpar.+?\s+"
    def initialize(md,data)
      @md,@data=md,data
      @env=SiSU_Env::InfoEnv.new(@md.fns)
      @f=SiSU_Env::FileOp.new(@md)
    end
    def songsheet
      begin
        data=@data
        data=pre(data)
        data=endnote(data)
        data,head=markup(data)
        objs_txt=tail(data)
        doc_txt=[head,objs_txt]
        output(doc_txt)
        makeinfo #KEEP reinstate when fixed #%
        place_info
      rescue; STDERR.puts SiSU_Screen::Ansi.new(@md.opt.act[:color_state][:set],$!,$@).rescue
      ensure
      end
    end
    def pre(data)
      data_new=[]
      data.each do |dob|
        # DEBUG 2003w16 this is a kludge, because i could not get parameters
        # from param, Sort out ... revert to more elegant solution
        if dob.is =='table'
          @@flag['tables']='y' # KLUDGE get from param
        end
        dob.obj=dob.obj.gsub(/<:p[bn]>/,'').
          gsub(/#{Mx[:lnk_o]}(.+?)#{Mx[:lnk_c]}#{Mx[:url_o]}(\S+?)#{Mx[:url_c]}/,'\1(\2 [linked to:] \3)').
          gsub(/(^|#{Mx[:gl_c]}|\s)\{(.+?)\}((?:https?|file):\/\/\S+)/,'\1(\2 [linked to:] \3)')
        do_mono=SiSU_TexInfoFormat::Texinfo.new(@md,dob)
        dob.obj=do_mono.spec_char(dob.obj)
        data_new << dob
      end
      data_new
    end
    def endnote(data)
      data_new=[]
      data.each do |dob|
        if dob.of==:para \
        || dob.of==:block
          dob.obj=dob.obj.gsub(/\s*#{Mx[:en_a_o]}(?:\d+)\s+(.+?)#{Mx[:en_a_c]}/m,' @footnote{ \1} ').
            gsub(/\s*#{Mx[:en_a_o]}(\*+)\s+(.+?)#{Mx[:en_a_c]}/m,' @footnote{ \1} ')
        end
        data_new << dob
      end
      data_new
    end
    def poem
      data,data_new=@data,[]
      @tex_file=[]
      @@counting=0
      data.each do |dob|
        if dob.is ==:code
          @@flag['code']=true
          @@counting=1
        end
        if dob.is ==:verse
          @@flag['poem']=1
        end
        if @@flag['code']
          if @@flag['code'] \
          && (dob.obj =~ /#{Mx[:gr_o]}code[-_](?:end|close)#{Mx[:gr_c]}/) #watch change not tested 200501 #fix
            @@flag['code']=false
          end
          if @@flag['code'] \
          && (dob.obj =~ /\S/)
            sub_array=dob.obj.dup
            @@line_mode=sub_array.scan(/.+/)
            Tune.code_lines(@@line_mode)
            dob.obj=@@line_mode.join
          end
        elsif @@flag['poem']==1
          if @@flag['poem']==1 \
          && (dob.obj =~ /#{Mx[:gr_o]}verse[-_](?:end|close)#{Mx[:gr_c]}/) #watch change not tested 200501 #fix
            @@flag['poem']=0
          end
          if @@flag['poem']==1 \
          && (dob.obj =~ /\S/)
            sub_array=dob.obj.dup
            @@line_mode=sub_array.scan(/.+/)
            Tune.code_lines(@@line_mode)
            dob.obj=@@line_mode.join
          end
        end
        @tex_file << dob.obj
        data_new << dob
      end
      data_new
    end
    def code_lines
      data,data_new=@data,[]
      data.each do |line|
        if (line =~ /\S/) \
        && (line !~ /#{Mx[:gr_o]}(code|verse).+/) #fix
          line=if @@flag['code']
            line.gsub(/^\s*(.+)/m,"\\noindent \\marginpar\[left-text\]{\\begin{tiny}#{@@counting}\\end{tiny}}\\1\\")
            @@counting+=1 if @@flag['code']
          else line.gsub(/(.+)/m,'\noindent\1')
          end
        end
        data_new << line
      end
    end
    def tables
      data,data_new=@data,[]
      @tex_file=[]
      @@tableheader=0
      data.each do |dob|
        if dob.obj =~ /#{Mx[:tc_p]}|#{Mx[:gr_o]}T/ui #fix
          do_mono=SiSU_TexInfoFormat::Texinfo.new(@md,dob)
          dob.obj=do_mono.longtable # using longtable latex package
        end
        @tex_file << dob.obj
        data_new << dob
      end
      data_new
    end
    def markup(data)
      data_new=[]
      @tex_file=[]
      @row_break='\\\\\\'
      @break_page="#{@row_break}\n#{@row_break} \n"
      @tex_file << SiSU_TexInfoFormat::Texinfo.new(@md).head
      mono=SiSU_TexInfoFormat::Texinfo.new(@md)
      @tex_file << mono.topnode(@md.title.full)
      texinfo_menu=[]
      n_menu,n_submenu=0,0
      @submenu,@subsubmenu={},{}
      data.each do |dob|
        if dob.is ==:heading \
        && (dob.ln.to_s =~ /^[0-3]$/)
          toc=SiSU_TexInfoFormat::Texinfo.new(@md,dob)
          texinfo_menu << toc.menu
        elsif dob.is ==:heading \
        && (dob.ln.to_s =~ /^[4-6]$/)
          toc=SiSU_TexInfoFormat::Texinfo.new(@md,dob)
          texinfo_menu << toc.menu
          case dob.ln
          when 4
            n_menu+=1
            @submenu[n_menu]=[]
          when 5
            n_submenu+=1
            @subsubmenu[n_menu]=[]
            @submenu[n_menu] << toc.menu
          when 6
            n_submenu+=1
            @subsubmenu[n_submenu]=[]
            @subsubmenu[n_submenu] << toc.menu
          end
        else
          dob.obj=dob.obj.gsub(/\s*(?:<:?br>|<br \/>)\s*/,"\n\n")
        end
        data_new << dob
      end
      data=data_new
      texinfo_menu=texinfo_menu.compact
      texinfo_menu << "* Dublin Core::"
      @tex_file << texinfo_menu
      @tex_file << "* Index::\n" +
        "@end menu\n\n" +
        "@c %% 5\n\n"
      n_menu,n_submenu=0,0
      @@do_submenu,@@do_subsubmenu=1,1
      data_new=[]
      data.each do |dob|
        unless defined? dob.ln and dob.ln == (5..6)
          mono=SiSU_TexInfoFormat::Texinfo.new(@md,dob)
        end
        if dob.is==:heading
          case dob.ln
          when 0 then dob=mono.level0
          when 1 then dob=mono.level1
          when 2 then dob=mono.level2
          when 3 then dob=mono.level3
          when 4;
            @@n4_txt=dob.obj
            dob=mono.level4
            n_menu+=1
            @@do_submenu,@@do_subsubmenu=1,1
          when 5;
            n_submenu+=1
            @@do_subsubmenu=1
            @@n5_txt=dob.obj
            if @@do_submenu==1
              menu=SiSU_TexInfoFormat::TeXinfoTxt.new(@md,dob,@submenu[n_menu])
              dob.obj="#{menu.submenu}#{SiSU_TexInfoFormat::Texinfo.new(@md,dob,@@n4_txt).level5.obj}"
              @@do_submenu=0
            else dob.obj="#{SiSU_TexInfoFormat::Texinfo.new(@md,dob,@@n4_txt).level5.obj}"
            end
          when 6;
            if @@do_submenu==1
              menu=SiSU_TexInfoFormat::TeXinfoTxt.new(@md,dob,@submenu[n_menu])
              dob.obj="#{menu.submenu}#{SiSU_TexInfoFormat::Texinfo.new(@md,dob,@@n5_txt).level6.obj}"
              dob.obj="#{menu.subsubmenu}#{mono.level6.obj}"
              @@do_subsubmenu=0
            else dob.obj="#{SiSU_TexInfoFormat::Texinfo.new(@md,dob,@@n5_txt).level6.obj}"
            end
          end
        else
          if dob.obj !~/\S/
            dob.obj=nil
          else
            if dob.is==:para \
            && (dob.obj !~/#{Dx[:ocn_o]}#{dob.ocn}#{Dx[:ocn_c]}/)
              dob.obj=dob.ocn.is_a?(Fixnum) \
              ? "#{dob.obj} #{Dx[:ocn_o]}#{dob.ocn}#{Dx[:ocn_c]}\n\n" : "#{dob.obj}\n\n"
            end
          end
        end
        #%case with endnotes
        dob.obj=dob.obj.gsub(/\s*[0-8]\\+(\S+)?\s+/,' ') if dob.obj
        data_new << dob
      end
      [data_new, @tex_file]
    end
    def number_titles
      data,data_new=@data,[]
      @tex_file=[]
      data.each do |dob|
        if (@md.markup =~ /num_top/i) \
        && (dob.obj !~ /#{Rx[:meta]}/)
          if (dob.obj =~ /^[1-6]\\+(?:~\S+)?\s*<!h-.+?-!>/) \
          && (dob.obj !~ /<:\d-endnotes>/)
            header=dob.obj[/<!h-(.+?)-!>/m, 1].gsub(/-/m,'.')
            dob.obj=dob.obj.gsub(/^(?:[1-6]\\+(?:~\S+)|<:([12356]|4-.+?-)>)\s*<!h-.+?-!>/,
              "\\1 #{header} ")
          end
        elsif dob.obj=~ /<!h!>|<!h\d!>|<!h.+?!>|<!!h.+?!>/
          if dob.obj=~ /<!h-.+?-!>/
            dob.obj=dob.obj.gsub(/<!h-(.+?)-!>/,'\1 ')
          end
        end
        @tex_file << dob.obj
      end
      data_new << dob
    end
    def tail(data)
      tex=SiSU_TexInfoFormat::Texinfo.new(@md)
      objs_txt=[]
      data.each do |dob|
        if dob.obj \
        && (dob.is !=:structure \
        && dob.is !=:comment)
           objs_txt << dob.obj if dob.obj
        end
      end
      objs_txt << tex.dublincore << tex.tail
      objs_txt
    end
    def output(data)
      filename_texinfo=%{#{@env.processing_path.texi}/#{@md.fnb}.texinfo}
      file_texinfo=File.new(filename_texinfo,'w+')
      puts filename_texinfo if @md.opt.act[:maintenance][:set]==:on
      data.each {|s| (file_texinfo.puts s,"\n") if s}
      file_texinfo.close
    end
    def makeinfo
      if @md.fns =~/\.(?:-|ssm\.)?sst$/
        m=/(.+?)\.((?:-|ssm\.)?sst)$/.match(@md.fns)
        fnb,sfx=m[1],m[2]
        pwd=Dir.pwd
        case sfx
        when /(?:-|ssm\.)?sst$/
          @env=SiSU_Env::InfoEnv.new(@md.fns,@md.opt.selections.str)
          Dir.chdir(@env.processing_path.texi)
          texinfo=SiSU_Env::SystemCall.new("#{fnb}.texinfo")
          texinfo.makeinfo
        end
        Dir.chdir(pwd)
      end
      def place_info
        unless FileTest.directory?(@f.output_path.texinfo.dir)
          FileUtils::mkdir_p(@f.output_path.texinfo.dir)
        end
        info_src=%{#{@env.processing_path.texi}/#{@md.fnb}.info}
        Dir.glob("#{info_src}*").sort.each do |f|
          FileUtils::cp(f, File.dirname(@f.place_file.info.dir)) # bug should provide dir without need to extract it!
        end
      end
    end
  end
end
__END__
#+END_SRC

* texinfo_format.rb

#+BEGIN_SRC ruby  :tangle "../lib/sisu/texinfo_format.rb"
<<sisu_document_header>>
module SiSU_TexInfoFormat
  @@table_pg_break_counter=1
  require_relative 'dp'                                 # dp.rb
    include SiSU_Param
  class Texinfo
    @@tex_1='\\\\~' #?? debug
    @@tabular="{tabular}"
    @@tex_pattern_margin_number="\\\\marginpar.+?\s+"
    def initialize(md,dob=nil,up='')
      @md,@dob,@up=md,dob,up
      if dob.is_a?(Hash)
        p dob.class
        p caller
      elsif dob.is_a?(String)
        p dob.class
        p caller
      end
    end
    def head
      t=Time.now
      year=t.year
      title=spec_char(@md.title.full)
      title=title.gsub(/<(br|p|i)>|<\/\s*(br|p|i)>|<(br|p)\s*\/>/," #{Tex[:backslash]*2} ").
        gsub(/\$/,"\\$").
        gsub(/[,]\s*/,' - ')
      if @md.title.sub
        subtitle=spec_char(@md.title.sub)
        subtitle=subtitle.gsub(/<(br|p|i)>|<\/\s*(br|p|i)>|<(br|p)\s*\/>/," #{Tex[:backslash]*2} ").
          gsub(/\$/,"\\$").
          gsub(/[,]\s*/,' - ')
        subtitle="\n@subtitle #{subtitle}\n"
      end
      subtitle ||=''
      author=@md.author if @md.author
      author ||=''
      author=author.gsub(/[\*]/,'') #if author
      #SiSU_Env::InfoVersion.instance.get_version
      head =<<WOK
\\input texinfo   @c -*-texinfo-*-
@comment %**start of header
@setfilename #{@md.fnb}.info
@settitle #{title}
@syncodeindex pg cp
@comment %**end of header
@c %% 2
@copying
SiSU texinfo of #{title}

Copyright @copyright{} #{year} #{author}.

@quotation
Copyright #{author}, generated by ``SiSU''
@end quotation
@end copying

@dircategory SiSU Texinfo
@direntry
,* sisu: SiSU texinfo file.
@end direntry
WOK
      if @md.title.sub
        titlepage=<<WOK
@c %% 3
@titlepage
@title #{title} #{subtitle}
@author #{author}
@page
@vskip 0pt plus 1filll
@insertcopying
@end titlepage
@contents
WOK
      else
        titlepage=<<WOK
@c %% 3
@titlepage
@title #{title}
@author #{author}
@page
@vskip 0pt plus 1filll
@insertcopying
@end titlepage

@contents
WOK
      end
      "#{head}#{titlepage}"
    end
    def topnode(txt)
      txt=spec_char(txt)
      txt=txt.gsub(/<(br|p|i)>|<\/\s*(br|p|i)>|<(br|p)\s*\/>/," #{Tex[:backslash]*2} ").
        gsub(/\$/,"\\$").
        gsub(/[,]\s*/,' - ')
      "@c %% 4\n" +
        "@ifnottex\n" +
        "@node Top\n" +
        "@top #{txt}\n\n" +
        "@insertcopying\n" +
        "@end ifnottex\n\n" +
        "@menu\n"
    end
    def dublincore
      if defined? @md.title.full \
      and @md.title.full=~/\S+/
        full_title=spec_char(@md.title.full)
      end
      if defined? @md.creator.author \
      and @md.creator.author=~/\S+/
        author=spec_char(@md.creator.author)
      end
      if defined? @md.publisher \
      and @md.publisher=~/\S+/
        publisher=spec_char(@md.publisher)
      end
      if defined? @md.creator.contributor \
      and @md.creator.contributor=~/\S+/
        contributor=spec_char(@md.contributor)
      end
      if defined? @md.date.published \
      and @md.date.published=~/\S+/
        date=spec_char(@md.date.published)
      end
      if defined? @md.date.created \
      and @md.date.created=~/\S+/
        date_created=spec_char(@md.date.created)
      end
      if defined? @md.date.issued \
      and @md.date.issued=~/\S+/
        date_issued=spec_char(@md.date.issued)
      end
      if defined? @md.date.available \
      and @md.date.available=~/\S+/
        date_available=spec_char(@md.date.available)
      end
      if defined? @md.date.valid \
      and @md.date.valid=~/\S+/
        date_valid=spec_char(@md.date.valid)
      end
      if defined? @md.date.modified \
      and @md.date.modified=~/\S+/
        date_modified=spec_char(@md.date.modified)
      end
      if defined? @md.classify.subject \
      and @md.classify.subject=~/\S+/
        subject=spec_char(@md.classify.subject)
      end
      if defined? @md.notes.description \
      and @md.notes.description=~/\S+/
        description=spec_char(@md.description)
      end
      if defined? @md.notes.coverage \
      and @md.notes.coverage=~/\S+/
        coverage=spec_char(@md.notes.coverage)
      end
      if defined? @md.notes.relation \
      and @md.notes.relation=~/\S+/
        relation=spec_char(@md.notes.relation)
      end
      #type=spec_char(@md.type) if @md.type                                   #dc
      if defined? @md.notes.format \
      and @md.notes.format=~/\S+/
        format=spec_char(@md.notes.format)
      end
      #if defined? @md.identifier.sisupod \
      #and @md.identifier.sisupod=~/\S+/
      #  identifier=spec_char(@md.identifier.sisupod)
      #end
      if defined? @md.original.source \
      and @md.original.source=~/\S+/
        source=spec_char(@md.original.source)
      end
      if defined? @md.title.language \
      and @md.title.language=~/\S+/
        language=spec_char(@md.title.language)
      end
      if defined? @md.rights.all \
      and @md.rights.all=~/\S+/
        rights=spec_char(@md.rights.all)
      end
      rights=spec_char(@md.rights.all)
      full_title="Title: #{full_title}\n\n" if full_title                           #dc
      author="Author: #{author}\n\n" if author                                      #dc
      subject="Subject: #{subject}\n\n" if subject                                  #dc
      description="Description: #{description}\n\n" if description                  #dc
      publisher="Publisher: #{publisher}\n\n" if publisher                          #dc
      contributor="Contributor: #{contributor}\n\n" if contributor                  #dc
      date="Date: #{date}\n\n" if date                                              #dc
      date_created="Date Created: #{date_created}\n\n" if date_created              #dc
      date_issued="Date Issued: #{date_issued}\n\n" if date_issued                  #dc
      date_available="Date Available: #{date_available}\n\n" if date_available      #dc
      date_valid="Date Valid: #{date_valid}\n\n" if date_valid                      #dc
      date_modified="Date Modified: #{date_modified}\n\n" if date_modified          #dc
      format="Format: #{format}\n\n" if format                                      #dc
      identifier="Identifier: #{identifier}\n\n" if identifier #watch               #dc
      source="Source: #{source}\n\n" if source                                      #dc
      language="Language: #{language}\n\n" if language                              #dc
      relation="Relation: #{relation}\n\n" if relation                              #dc
      coverage="Coverage: #{coverage}\n\n" if coverage                              #dc
      rights="Rights: #{rights}\n\n" if rights                                      #dc
      <<WOK
@node Dublin Core
@unnumbered Dublin Core
@cindex chapter, Dublin Core

#{full_title}#{author}#{subject}#{description}#{publisher}#{contributor}#{date}#{date_created}#{date_issued}#{date_available}#{date_valid}#{date_modified}#{format}#{identifier}#{source}#{language}#{relation}#{coverage}#{rights}

WOK
    end
    def tail
      <<WOK
@c %% 6
@node Index
@unnumbered Index
@printindex cp

@bye
WOK
    end
    def clean(dob)
      if dob.is==:heading \
      and dob.obj !~/#{Dx[:ocn_o]}#{dob.ocn}#{Dx[:ocn_c]}/
        dob.obj=dob.ocn.is_a?(Fixnum) \
        ? "#{dob.obj} #{Dx[:ocn_o]}#{dob.ocn}#{Dx[:ocn_c]}" : dob.obj
      end
      dob.obj=dob.obj.gsub(/\n/m,' ').
        gsub(/,\s+/,' - ').
        strip
      dob
    end
    def menu
      dob=clean(@dob)
      m=dob.obj.gsub(/[:,]\s*/,' - ').
        gsub(/@footnote\{.+?\}\s+/,'')
      m="* #{m}::"
    end
    def level_common
      dob=clean(@dob)
      nd=dob.obj.gsub(/@footnote\{.+?\}\s+/,'').
        gsub(/: \s*/,' - ')
      dob.obj="@node #{nd}\n@unnumbered #{nd}\n@cindex chapter, #{nd}\n\n"
      dob
    end
    def level_sub(up)
      dob=clean(@dob)
      nd=dob.obj.gsub(/@footnote\{.+?\}\s+/,'').
        gsub(/: \s*/,' - ')
      dob.obj="@node #{nd}, #{up}\n@comment node-name, up\n@unnumbered #{nd}\n@cindex chapter, #{nd}\n\n"
      dob
    end
    def level0
      level_common
    end
    def level1
      level_common
    end
    def level2
      level_common
    end
    def level3
      level_common
    end
    def level4
      level_common
    end
    def level5
      level_sub(@up)
    end
    def level6
      level_sub(@up)
    end
    def spec_char(txt) # special characters
      txt=txt.gsub(/#{Mx[:br_eof]}/i,'').
        gsub(/#{Mx[:gl_o]}#169#{Mx[:gl_c]}/,'(c)').
        gsub(/#{Mx[:gl_o]}#(?:lt|060)#{Mx[:gl_c]}/,'<').gsub(/#{Mx[:gl_o]}(gt|#062)#{Mx[:gl_c]}/,'>').
        gsub(/#{Mx[:gl_o]}#123#{Mx[:gl_c]}/,'{').gsub(/#{Mx[:gl_o]}#125#{Mx[:gl_c]}/,'}').
        gsub(/#{Mx[:gl_o]}#(?:126|152)#{Mx[:gl_c]}/i,'~').
        gsub(/#{Mx[:gl_o]}#033#{Mx[:gl_c]}/,'!').
        gsub(/#{Mx[:gl_o]}#035#{Mx[:gl_c]}/,'#').
        gsub(/#{Mx[:gl_o]}#042#{Mx[:gl_c]}/,'*').
        gsub(/#{Mx[:gl_o]}#047#{Mx[:gl_c]}/,'/').
        gsub(/#{Mx[:gl_o]}#095#{Mx[:gl_c]}/,'_').
        gsub(/#{Mx[:gl_o]}#092#{Mx[:gl_c]}/,'\\').
        gsub(/(?:#{Mx[:br_line]}|#{Mx[:br_nl]})\s*/,"\n\n").                                   # watch
        gsub(/<sup><font face=symbol>&atild;<\/font><\/sup>/,' ').
        #gsub(/\\/,'\\backslash ').
        gsub(/<:pb>/,'\\newpage').
        gsub(/\\backslash copyright/,'\\copyright ').
        gsub(/\^/,'\\wedge ').
        gsub(/(\$)/,"\\$").
        gsub(/\~/,'\\~').
        gsub(/#{Mx[:url_o]}(https?:\S+?)#{Mx[:url_c]}/,'<\1>').
        gsub(/#{Mx[:url_o]}_(https?:\S+?)#{Mx[:url_c]}/,'\1').
        gsub(/§/i,'\S').
        gsub(/£/i,'\pounds').
        gsub(/å/,'\aa').gsub(/Å/,'\AA').
        gsub(/æ/,'\ae').gsub(/Æ/,'\AE').
        gsub(/ø/,'\o').gsub(/Ø/,'\O').
        gsub(/<a href=".+?">/i,' ').
        gsub(/<\/a>/i,' ').
        gsub(/<!>/i,' ').
        gsub(/#{Mx[:br_paragrph]}/i,''). #watch
        gsub(/#{Mx[:fa_bold_o]}(.+?)#{Mx[:fa_bold_c]}/,'*\1*').
        gsub(/#{Mx[:fa_italics_o]}(.+?)#{Mx[:fa_italics_c]}/,'/\1/').
        gsub(/#{Mx[:fa_underscore_o]}(.+?)#{Mx[:fa_underscore_c]}/,'_\1_').
        gsub(/#{Mx[:fa_subscript_o]}(.+?)#{Mx[:fa_subscript_c]}/,'[\1]').
        gsub(/#{Mx[:fa_superscript_o]}(.+?)#{Mx[:fa_superscript_c]}/,'^\1^').
        gsub(/#{Mx[:fa_insert_o]}(.+?)#{Mx[:fa_insert_c]}/,'+\1+').
        gsub(/#{Mx[:fa_cite_o]}(.+?)#{Mx[:fa_cite_c]}/,'"\1"').
        gsub(/#{Mx[:fa_strike_o]}(.+?)#{Mx[:fa_strike_c]}/,'-\1-').
        gsub(/@/i,'@@').
        gsub(/\{/,'@{').gsub(/\}/,'@}').
        gsub(/(?:&nbsp;|#{Mx[:nbsp]})+/,' ').        # ~ character for hardspace
        gsub(/&(\S+?);/,' ').
        gsub(/&/,'<=and>').
        gsub(/(\s+&\s+)/,' and ').
        gsub(/(\&)/,"\\&").
        gsub(/"(.+?)"/,"`\\1'").                                        # open & close "
        gsub(/\s+"/," `").                                              # open "
        gsub(/^([1-6-]\\+(?:~\S+)?|<.+?>)?\s*"/,'\1`').       # open "
        gsub(/"(\s|\.|,|:|;)/,"'\\1").                                  # close "
        gsub(/"([1-6-]\\+(?:~\S+)?|<.+?>)?\s*$/,"'\\1").       # close "
        gsub(/"(\.|,)/,"'").                                            # close "
        gsub(/\s+'/," `").                                              # open '
        gsub(/^([1-6-]\\+(?:~\S+)?|<.+?>)?\s*'/,'\1`').       # open '
        gsub(/(<font.*?>|<\/font>)/,'')
    end
    def longtable
      @end_table="\\end{longtable}"
      @row_break='\\\\\\'
      if @dob[/#{Mx[:gr_o]}Th?#{Mx[:tc_p]}\s+c(\d+);(.+?)#{Mx[:gr_c]}/ui] #CHECK !> closure #fix
        no_of_cols,cols_width=$1,$2
        @@tableheader=1 if @dob =~ /#{Mx[:gr_o]}Th/i #fix
        @w=cols_width.split(/;\s+/)
        @@number_of_cols=no_of_cols
        @colW=[]
        @colW << '{'
        @w.each  do |x|
          col_w=x.gsub(/.+/,'l\|') #unless x.nil?
          @colW << "#{col_w}" if col_w
        end
        @colW << '}'
        @colW=@colW.join
        @@start_table="\\setlength{\\LTleft}{0pt}\n\\setlength{\\LTright}{\\fill}\n" +
          "\\begin{longtable}[hb]#{@colW}\n"
        @dob.obj=@dob.obj.gsub(/#{Mx[:gr_o]}Th?#{Mx[:tc_p]}\s+c\d+?;.+#{Mx[:gr_c]}/u,"#{@@start_table}") #fix
      end
      if @dob =~/#{Mx[:gr_o]}TZ#{Mx[:gr_c]}/ #fix
        @dob.obj=@dob.obj.gsub(/#{Mx[:gr_o]}TZ#{Mx[:gr_c]}/," #{@end_table}") #fix
      end
      @dob.obj=@dob.obj.gsub(/#{Mx[:tc_o]}#{Mx[:tc_p]}/u,'')
      if @@tableheader==1
        if @dob =~/#{Mx[:tc_p]}\d+?#{Mx[:tc_p]}(.+?)(?:#{Mx[:tc_p]}|!)/u
          tablefoot=para[/\<!f(.+?)!\>/,1]
          @dob.obj=@dob.obj.gsub(/\<!f(.+?)!\>/,'').
            gsub(/#{Mx[:tc_p]}\d+?#{Mx[:tc_p]}(.+?)(?:#{Mx[:tc_p]}|!)/u,
              "{\\begin{tiny} {\\bfseries \\1}\\end{tiny}}&").
            gsub(/&>\s*$/,
              " #{@row_break} \\hline\\endhead #{@row_break}")
          @dob="#{@dob} \\multicolumn{#{@@number_of_cols}}{l}{\\tiny #{tablefoot}} \\\\ \\hline\n\\endfoot\n\\hline\n" if tablefoot
          @@tableheader=0
          @@number_of_cols=0
        end
      else
        if @dob =~/#{Mx[:tc_p]}\d+?#{Mx[:tc_p]}(.+?)(?:#{Mx[:tc_p]}|!)/u
          @dob.obj=@dob.obj.gsub(/#{Mx[:tc_p]}\d+?#{Mx[:tc_p]}(.+?)(?:#{Mx[:tc_p]}|!)/u,"\\begin{tiny}\\1\\end{tiny}&").
            gsub(/&>\s*$/," #{@row_break}")
        end
      end
      @dob
    end
    def scopedtable
      # some features related to headers have been incorporated in longtable
      # that are not included yet here, so until synced is broken on some
      # input files, work needs to be done if is to work as before
      @end_table="\\end{tabular}"
      @row_break='\\\\\\\\'
      @break_page="#{@row_break}\n#{@row_break} \n"
      if @dob[/#{Mx[:gr_o]}Th?#{Mx[:tc_p]}\s+c(\d+);(.+?)#{Mx[:gr_c]}/ui] #fix
        cols_width=$2
        @w=cols_width.split(/;\s+/)
        @colW=[]
        @w.each  do |x|
          col_w=((x.to_i*12)/100.00).to_s #unless x.nil?
          @colW << "p{#{col_w}cm}" if col_w
        end
        @@start_table="\\begin{tabular}{#{@colW}}\n"
        @dob.obj=@dob.obj.gsub(/#{Mx[:gr_o]}Th?#{Mx[:tc_p]}\s+c\d+?;.+#{Mx[:gr_c]}/u,"#{@@start_table}") #fix
      end
      if @dob =~/#{Mx[:gr_o]}TZ#{Mx[:gr_c]}/ #fix
        @dob.obj=@dob.obj.gsub(/#{Mx[:gr_o]}TZ#{Mx[:gr_c]}/,"#{@end_table}") #fix
        @@table_pg_break_counter=1
      end
      if @dob =~/#{Mx[:tc_o]}#{Mx[:tc_p]}/u
        if @@table_pg_break_counter==28 # taken from 34 ideal for portrait to 28 which suits landscape
          @dob =
            "\n\n#{@end_table} \n" +
            "#{@break_page}" +
            "#{@@start_table}\n"
          @@table_pg_break_counter=1
        else
          @dob.obj=@dob.obj.gsub(/#{Mx[:tc_o]}#{Mx[:tc_p]}/u,'')
          @@table_pg_break_counter+=1
          @dob.obj=@dob.obj.gsub(/\<!f(.+?)!\>/,'')
        end
      end
      if @dob =~/#{Mx[:tc_p]}\d+?#{Mx[:tc_p]}(.+?)(?:#{Mx[:tc_p]}|!)/u
        @dob.obj=@dob.obj.gsub(/#{Mx[:tc_p]}\d+?#{Mx[:tc_p]}(.+?)(?:#{Mx[:tc_p]}|!)/u,"\\begin{tiny}\\1\\end{tiny}&").
          gsub(/&>\s*$/,"#{@row_break}")
      end
      @dob
    end
    def graphics
      dir=SiSU_Env::InfoEnv.new(@md.fns)
      @dob.obj=@dob.obj.gsub(/<::\s+(\S+?)\s+>/i, #watch
        "\\includegraphics*[width=11pt]{#{dir.path.image_source_include}/c_\\1.png}")
    end
    def image
      dir=SiSU_Env::InfoEnv.new(@md.fns)
      width="100"
      width=@dob[/<:image.+?width=``(\d+)''.+?>/im,1]
      width=width.to_i*0.4
      @dob.obj=@dob.obj.gsub(/<:image\s+((?:https?|file|ftp)\S+)\s+(\S+)\s+.+\s+?>/i,
          "\\href{\\1}{\\includegraphics*[width=#{width}pt]{#{dir.path.image_source_include}/\\2}}").
        gsub(/<:image\s+(\S+)\s+.+\s+?>/i,
          "\\includegraphics*[width=#{width}pt]{#{dir.path.image_source_include}/\\1}")
    end
    def png
      # very messy clean up ! - work area, testing
      z=@dob[/\\\{(.+?)\}(?:image|png)/,1] # match operator for z \\ fragile !
      image=z.scan(/\S+/)[0] #image,w,x,y=z.scan(/\S+/)
      image=image.gsub(/\\/,'')
      @dob.obj=@dob.obj.gsub(/\\\{\S+\.(png|jpg|gif).+?\}(image|png)/,"<image #{image} not available>")  # fragile match operator\\ fragile !
    end
    def http
      # very messy clean up ! - work area, testing
      z=@dob[/#{Mx[:lnk_o]}(.+?)#{Mx[:lnk_c]}#{Mx[:url_o]}\S+?#{Mx[:url_c]}/,1] # match operator for z \\ fragile !
      url=@dob[/((?:https?|file|ftp):\S+)/im,1]
      if @dob =~/\.(png|jpg|gif)/
        image=z.scan(/\S+/)[0] #image,w,x,y=z.scan(/\S+/)
        image=image.gsub(/\\/,'')
        width=200
        width=z[/w=(\d+)/im,1] if z =~/w=(\d+)/
        width=width.to_i*0.8
        width=400 if width > 400
        c=z[/``(.+?)''/im,1]
        caption="{\\\\\\\ \n\\begin{scriptsize}#{c}\\end{scriptsize}&}" if c
      end
      if image
        dir=SiSU_Env::InfoEnv.new(@md.fns)
        @dob.obj=@dob.obj.gsub(/#{Mx[:lnk_o]}\S+\.(png|jpg|gif).+?#{Mx[:lnk_c]}#{Mx[:url_o]}\S+?#{Mx[:url_c]}/, # fragile match operator\\ fragile !
          "\n\\href{#{url}}{\\includegraphics*[width=#{width}pt]{#{dir.path.image_source_include}/#{image}}}#{caption}")
      else
        link=z[/(.+?)\\/im,1]
        @dob.obj=@dob.obj.gsub(/#{Mx[:lnk_o]}.+?#{Mx[:lnk_c]}#{Mx[:url_o]}\S+#{Mx[:url_c]}/,"\n\\noindent\\href{#{url}}{#{link}}")  # fragile match operator\\ fragile !
      end
    end
  end
  class TeXinfoTxt
    def initialize(md,dob,txt)
      @md,@dob,@txt=md,dob,txt
    end
    def clean(dob,txt)
      if dob.is==:heading \
      and txt !~/#{Dx[:ocn_o]}#{dob.ocn}#{Dx[:ocn_c]}/
        txt=dob.ocn.is_a?(Fixnum) \
        ? "#{dob.obj} #{Dx[:ocn_o]}#{dob.ocn}#{Dx[:ocn_c]}" : dob.obj
      end
      txt.strip
    end
    def submenu
      txt=@txt.join("\n")
      txt=clean(@dob,txt)
      txt="@menu\n#{txt}\n@end menu\n\n"
      txt=txt.gsub(/.+/m,"#{txt}")
    end
    def subsubmenu
      txt=@txt.join("\n")
      txt=clean(@dob,txt)
      txt="@menu\n#{txt}\n@end menu\n\n"
      txt=txt.gsub(/.+/m,"#{txt}")
    end
  end
end
__END__
watch title, might need full_title
#+END_SRC

* document header

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

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

  - 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
#+END_SRC