path: root/lib/sisu/v4/dal_doc_str.rb

# encoding: utf-8
=begin

 * Name: SiSU

 * Description: a framework for document structuring, publishing and search

 * Author: Ralph Amissah

 * Copyright: (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   2007, 2008, 2009, 2010, 2011, 2012, 2013 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

 * Hompages:
   <http://www.jus.uio.no/sisu>
   <http://www.sisudoc.org>

 * Download:
   <http://www.sisudoc.org/sisu/en/SiSU/download.html>

 * Git
   <http://sources.sisudoc.org/gitweb/?p=code/sisu.git;a=summary>
   <http://sources.sisudoc.org/?p=code/sisu.git;a=blob;f=lib/sisu/v4/dal_doc_str.rb;hb=HEAD>

 * Ralph Amissah
   <ralph@amissah.com>
   <ralph.amissah@gmail.com>

 ** Description: document abstraction

=end
module SiSU_DAL_DocumentStructureExtract
  class Instantiate < SiSU_Param::Parameters::Instructions
    @@flag={
      ocn:      :on,
      code:     :off,
      poem:     :off,
      block:    :off,
      group:    :off,
      alt:      :off,
      table:    :off,
      table_to: :off,
    }
    def initialize
      @@counter=@@column=@@columns=0
      @@line_mode=''
    end
  end
  class Build
    @@flag={
      ocn:      :on,
      code:     :off,
      poem:     :off,
      block:    :off,
      group:    :off,
      alt:      :off,
      table:    :off,
      table_to: :off,
    }
    def initialize(md,data)
      @md,@data=md,data
      SiSU_DAL_DocumentStructureExtract::Instantiate.new
      @pb=SiSU_DAL_DocumentStructure::ObjectLayout.new.break(Hx[:br_page])
      @pbn=SiSU_DAL_DocumentStructure::ObjectLayout.new.break(Hx[:br_page_new])
      @pbl=SiSU_DAL_DocumentStructure::ObjectLayout.new.break(Hx[:br_page_line])
    end
    def ln_get(lv)
      case lv
      when /A/; 1
      when /B/; 2
      when /C/; 3
      when /1/; 4
      when /2/; 5
      when /3/; 6
      when /4/; 7
      when /5/; 8
      when /6/; 9
      end
    end
    def image_test(str)
      str=~/\{\s*\S+?\.png.+?\}https?:\/\/\S+/ \
      ? true
      : false
    end
    def bullet_test(str)
      (str=~/\*/) \
      ? true
      : false
    end
    def hang_and_indent_test(str)
      hang_indent=if str=~/^_([1-9])[^_]/
        [$1,$1]
      elsif str=~/^__([1-9])/
        [0,$1]
      elsif str=~/^_([0-9])_([0-9])/
        [$1,$2]
      else
        [0,0]
      end
      hang,indent=hang_indent[0],hang_indent[1]
      [hang,indent]
    end
    def hang_and_indent_def_test(str1,str2)
      hang_indent=if str1=~/^_([1-9])[^_]/
        [$1,$1]
      elsif str1=~/^__([1-9])/
        [0,$1]
      elsif str1=~/^_([0-9])_([0-9])/
        [$1,$2]
      else
        [0,0]
      end
      obj=if str2 =~/^(.+?)\s+\\\\(?:\s+|\n)/
        str2.gsub(/^(.+?)(\s+\\\\(?:\s+|\n))/,"#{Mx[:fa_bold_o]}\\1#{Mx[:fa_bold_c]}\\2")
      else
        str2.gsub(/^(.+?)\n/,"#{Mx[:fa_bold_o]}\\1#{Mx[:fa_bold_c]}\n")
      end
      hang,indent=hang_indent[0],hang_indent[1]
      [hang,indent,obj]
    end
    def endnote_test?(str)
      (str=~/~\{.+?\}~|~\[.+?\]~/) \
      ? true
      : false
    end
    def extract_tags(str,nametag=nil)
      tags=[]
      if str.nil?
      else
        if str =~/(?:^|[ ])\*~([a-z0-9._-]+)(?=[ #{Mx[:br_nl]}]|$)/
          str=str.gsub(/(^|[ ])\*~([a-z0-9._-]+)(?=[ #{Mx[:br_nl]}]|$)/i,
              "\\1#{Mx[:tag_o]}\\2#{Mx[:tag_c]}").
            gsub(/ [ ]+/i,' ')
          tags=str.scan(/#{Mx[:tag_o]}(\S+?)#{Mx[:tag_c]}/).flatten
          str=str.gsub(/[ ]?#{Mx[:tag_o]}\S+?#{Mx[:tag_c]}[ ]?/,' ') #may be issues with spaces would leave one, but "code" blocks?
        end
        tags=nametag ? (tags << nametag) : tags
      end
      [str,tags]
    end
    def identify_parts
      tuned_file=[]
      @tuned_block,@tuned_code=[],[]
      @@counter,@verse_count=0,0
      @metadata={}
      @data.each do |t_o|
        if t_o =~/^--([+~-])[#]$/
          h=case $1
          when /[+]/
            @@flag[:ocn]=:on
            {flag: :ocn_on}
          when /[~]/
            @@flag[:ocn]=:off_headings_substantive
            {flag: :ocn_off, mod: :headings_substantive}
          when /[-]/
            @@flag[:ocn]=:off_headings_exclude
            {flag: :ocn_off, mod: :headings_exclude}
          else
            @@flag[:ocn]=:on
            {flag: :ocn_on}
          end
          t_o=SiSU_DAL_DocumentStructure::ObjectFlag.new.flag_ocn(h)
          next
        end
        t_o=t_o.gsub(/(?:\n\s*\n)+/m,"\n") if @@flag[:code]==:off
        if t_o !~/^(?:code|poem|alt|group|block)\{|^\}(?:code|poem|alt|group|block)|^(?:table\{|\{table)[ ~]/ \
        and t_o !~/^[`]{3}\s+(?:code|poem|alt|group|block|table)|^[`]{3}(?:\s+[~-][#]|\s+\~\{.+?\}\~)?\s*$/ \
        and @@flag[:code]==:off \
        and @@flag[:poem]==:off \
        and @@flag[:group]==:off \
        and @@flag[:block]==:off \
        and @@flag[:alt]==:off \
        and @@flag[:table]==:off
          unless t_o =~/^(?:@\S+?:|%+)\s/                  # extract book index for paragraph if any
            idx=if t_o=~/^=\{(.+)\}\s*$\Z/m; m=$1
              t_o=t_o.gsub(/\n=\{.+\}\s*$\Z/m,'')
              m
            else nil
            end
          end
          t_o=case t_o
          when /^#{Mx[:meta_o]}\S+?#{Mx[:meta_c]}/                                 #metadata, header
            if t_o=~/^#{Mx[:meta_o]}(\S+?)#{Mx[:meta_c]}\s*(.+)/m
              tag,obj=$1,$2
              @metadata[tag]=obj
            end
            t_o=nil
          when /^%+\s/                                     #comment
            t_o=if t_o=~/^%+\s+(.+)/
              h={obj: $1}
              SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
            else nil
            end
          when /^:?([A-C1-6])\~/                           #heading / lv
            lv=$1
            ln=ln_get(lv)
            t_o=if t_o=~/^:?[A-C1-6]\~\s+(.+)/m
              obj=$1
              note=endnote_test?(obj)
              obj,tags=extract_tags(obj)
              if @@flag[:ocn]==:off_headings_exclude \
              or @@flag[:ocn]==:off_headings_substantive
                unless obj =~ /[~-][#]\s*$/
                  if @@flag[:ocn]==:off_headings_exclude
                    obj << ' -#'
                  elsif @@flag[:ocn]==:off_headings_substantive
                    obj << ' ~#'
                  end
                end
              end
              h={ lv: lv, ln: ln, obj: obj, idx: idx, tags: tags }
              SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h)
            elsif t_o=~/^:?[A-C1-6]\~(\S+?)-\s+(.+)/m
              name,obj=$1,$2
              note=endnote_test?(obj)
              obj,tags=extract_tags(obj)
              if @@flag[:ocn]==:off_headings_exclude \
              or @@flag[:ocn]==:off_headings_substantive
                unless obj =~ /[~-][#]\s*$/
                  if @@flag[:ocn]==:off_headings_exclude
                    obj << ' -#'
                  elsif @@flag[:ocn]==:off_headings_substantive
                    obj << ' ~#'
                  end
                end
              end
              h={ lv: lv, name: name, obj: obj, idx: idx, autonum_: false, tags: tags}
              SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h)
            elsif t_o=~/^:?[A-C1-6]\~(\S+)\s+(.+)/m
              name,obj=$1,$2
              note=endnote_test?(obj)
              obj,tags=extract_tags(obj,name)
              if @@flag[:ocn]==:off_headings_exclude \
              or @@flag[:ocn]==:off_headings_substantive
                unless obj =~ /[~-][#]\s*$/
                  if @@flag[:ocn]==:off_headings_exclude
                    obj << ' -#'
                  elsif @@flag[:ocn]==:off_headings_substantive
                    obj << ' ~#'
                  end
                end
              end
              h={ lv: lv, name: name, obj: obj, idx: idx, tags: tags }
              SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h)
            else nil
            end
          when /^_(?:[1-9]!?|[1-9]?\*)\s+/                  #indented and/or bullet paragraph
            t_o=if t_o=~/^(_(?:[1-9]?\*|[1-9]!?)\s+)(.+)/m
              tst,obj=$1,$2
              if t_o=~/^_[1-9]!\s+.+/m
                hang,indent,obj=hang_and_indent_def_test(tst,obj)
              else
                hang,indent=hang_and_indent_test(tst)
              end
              bullet=bullet_test(tst)
              image=image_test(obj)
              note=endnote_test?(obj)
              obj,tags=extract_tags(obj)
              unless obj=~/\A\s*\Z/m
                if @@flag[:ocn]==:off_headings_exclude \
                or @@flag[:ocn]==:off_headings_substantive
                  unless obj =~ /[~-][#]\s*$/
                    obj << ' ~#'
                  end
                end
                h={ bullet_: bullet, hang: hang, indent: indent, obj: obj, idx: idx, note_: note, image_: image, tags: tags }
                SiSU_DAL_DocumentStructure::ObjectPara.new.paragraph(h)
              end
            else nil
            end
          when /^_[0-9]?_[0-9]!?\s+/                  #hanging indent paragraph
            t_o=if t_o=~/^(_[0-9]?_[0-9]!?\s+)(.+)/m
              tst,obj=$1,$2
              if t_o=~/^_[0-9]?_[0-9]!\s+.+/m
                hang,indent,obj=hang_and_indent_def_test(tst,obj)
              else
                hang,indent=hang_and_indent_test(tst)
              end
              image=image_test(obj)
              note=endnote_test?(obj)
              obj,tags=extract_tags(obj)
              unless obj=~/\A\s*\Z/m
                if @@flag[:ocn]==:off_headings_exclude \
                or @@flag[:ocn]==:off_headings_substantive
                  unless obj =~ /[~-][#]\s*$/
                    obj << ' ~#'
                  end
                end
                h={ hang: hang, indent: indent, obj: obj, idx: idx, note_: note, image_: image, tags: tags }
                SiSU_DAL_DocumentStructure::ObjectPara.new.paragraph(h)
              end
            else nil
            end
          when /^<(?:br)?:(?:pa?r|o(?:bj|---)?)>\s*$/      #[br:par] #[br:obj]
            SiSU_DAL_DocumentStructure::ObjectLayout.new.break(Hx[:br_obj])
          when /^(?:-\\\\-|<:pb>)\s*$/                                #[br:pg]
            SiSU_DAL_DocumentStructure::ObjectLayout.new.break(Hx[:br_page],:markup)
          when /^(?:=\\\\=|<:pn>)\s*$/                                #[br:pgn]
            SiSU_DAL_DocumentStructure::ObjectLayout.new.break(Hx[:br_page_new],:markup)
          when /^-\.\.-\s*$/                                          #[br:pgl]
            SiSU_DAL_DocumentStructure::ObjectLayout.new.break(Hx[:br_page_line],:markup)
          else                                             #paragraph
            image=image_test(t_o)
            note=endnote_test?(t_o)
            obj,tags=extract_tags(t_o)
            if @@flag[:ocn]==:off_headings_exclude \
            or @@flag[:ocn]==:off_headings_substantive
              unless obj =~ /[~-][#]\s*$/
                obj << ' ~#'
              end
            end
            unless obj=~/\A\s*\Z/m
              h={ bullet_: false, indent: 0, hang: 0, obj: obj, idx: idx, note_: note, image_: image, tags: tags }
              SiSU_DAL_DocumentStructure::ObjectPara.new.paragraph(h)
            end
          end
        elsif @@flag[:code]==:off
          if t_o =~/^(?:code\{|[`]{3}\s+code)/
            @@flag[:code]=case t_o
            when /^code\{/;        :curls
            when /^[`]{3}\s+code/; :tics
            else                   @@flag[:code] #error
            end
            @@counter=1
            @codeblock_numbered=(t_o =~/^(?:code\{#|[`]{3}\s+code\s[#])/) ? true : false
            h={ obj: 'code block start' }                   #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
          elsif t_o =~/^(?:poem\{|[`]{3}\s+poem)/
            @@flag[:poem]=case t_o
            when /^poem\{/;        :curls
            when /^[`]{3}\s+poem/; :tics
            else                   @@flag[:poem] #error
            end
            h={ obj: 'poem start' }                         #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
            tuned_file << t_o
          elsif t_o =~/^(?:group\{|[`]{3}\s+group)/
            @@flag[:group]=case t_o
            when /^group\{/;        :curls
            when /^[`]{3}\s+group/; :tics
            else                    @@flag[:group] #error
            end
            h={ obj: 'group text start' }                   #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
            tuned_file << t_o
          elsif t_o =~/^(?:block\{|[`]{3}\s+block)/
            @@flag[:block]=case t_o
            when /^block\{/;        :curls
            when /^[`]{3}\s+block/; :tics
            else                    @@flag[:block] #error
            end
            h={ obj: 'block text start' }                   #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
            tuned_file << t_o
          elsif t_o =~/^(?:alt\{|[`]{3}\s+alt)/
            @@flag[:alt]=case t_o
            when /^alt\{/;        :curls
            when /^[`]{3}\s+alt/; :tics
            else                  @@flag[:alt] #error
            end
            h={ obj: 'alt text start' }                     #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
            tuned_file << t_o
          elsif t_o =~/^(?:table\{|[`]{3}\s+table|\{table)[ ~]/
            h={ obj: 'table start' }                        #introduce a counter
            ins=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
            tuned_file << ins
            if t_o=~/^table\{(?:~h)?\s+/
              @@flag[:table]=:curls
              @rows=''
              case t_o
              when /table\{~h\s+c(\d+);\s+(.+)/
                cols=$1
                col=$2.scan(/\d+/)
                heading=true
              when /table\{\s+c(\d+);\s+(.+)/
                cols=$1
                col=$2.scan(/\d+/)
                heading=false
              end
              @h={ head_: heading, cols: cols, widths: col, idx: idx }
            elsif t_o=~/^[`]{3}\s+table(?:~h)?\s+c\d+/
              @@flag[:table]=:tics
              @rows=''
              case t_o
              when /^[`]{3}\s+table~h\s+c(\d+);\s+(.+)/
                cols=$1
                col=$2.scan(/\d+/)
                heading=true
              when /^[`]{3}\s+table\s+c(\d+);\s+(.+)/
                cols=$1
                col=$2.scan(/\d+/)
                heading=false
              end
              @h={ head_: heading, cols: cols, widths: col, idx: idx }
            elsif t_o=~/^\{table(?:~h)?(?:\s+\d+;?)?\}\n.+\Z/m
              m1,m2,hd=nil,nil,nil
              tbl=/^\{table(?:~h)?(?:\s+\d+;?)?\}\n(.+)\Z/m.match(t_o)[1]
              hd=((t_o =~/^\{table~h/) ? true : false)
              tbl,tags=extract_tags(tbl)
              rws=tbl.split(/\n/)
              rows=''
              cols=nil
              rws.each do |r|
                cols=(cols ? cols : (r.scan('|').length) +1)
                r=r.gsub(/\s*\|\s*/m,"#{Mx[:tc_p]}")        #r.gsub!(/\|/m,"#{Mx[:tc_p]}")
                rows += r + Mx[:tc_c]
              end
              col=[]
              if t_o =~/^\{table(?:~h)?\s+(\d+);?\}/       #width of col 1 given as %, usually when wider than rest that are even
                c1=$1.to_i
                width=(100 - c1)/(cols - 1)
                col=[ c1 ]
                (cols - 1).times { col << width }
              else                                         #all columns of equal width
                width=100.00/cols
                cols.times { col << width }
              end
              h={ head_: hd, cols: cols, widths: col, obj: rows, idx: idx, tags: tags }
              t_o=SiSU_DAL_DocumentStructure::ObjectTable.new.table(h) unless h.nil?
              tuned_file << t_o
              h={ obj: 'table end' }                        #introduce a counter
              t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
              t_o
            elsif t_o=~/^[`]{3}\s+table(?:~h)?\s+/
              m1,m2,hd=nil,nil,nil
              h=case t_o
              when /^[`]{3}\s+table~h\s+(.+?)\n(.+)\Z/m          #two table representations should be consolidated as one
                m1,tbl,hd=$1,$2,true
              when /^[`]{3}\s+table\s+(.+?)\n(.+)\Z/m            #two table representations should be consolidated as one
                m1,tbl,hd=$1,$2,false
              else nil
              end
              tbl,tags=extract_tags(tbl)
              col=m1.scan(/\d+/)
              rws=tbl.split(/\n/)
              rows=''
              rws.each do |r|
                r=r.gsub(/\s*\|\s*/m,"#{Mx[:tc_p]}")        #r.gsub!(/\|/m,"#{Mx[:tc_p]}")
                rows += r + Mx[:tc_c]
              end
              h={ head_: hd, cols: col.length, widths: col, obj: rows, idx: idx, tags: tags }
              t_o=SiSU_DAL_DocumentStructure::ObjectTable.new.table(h) unless h.nil?
              tuned_file << t_o
              h={ obj: 'table end' }                        #introduce a counter
              t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
              t_o
            elsif t_o=~/^\{table(?:~h)?\s+/
              m1,m2,hd=nil,nil,nil
              h=case t_o
              when /\{table~h\s+(.+?)\}\n(.+)\Z/m          #two table representations should be consolidated as one
                m1,tbl,hd=$1,$2,true
              when /\{table\s+(.+?)\}\n(.+)\Z/m            #two table representations should be consolidated as one
                m1,tbl,hd=$1,$2,false
              else nil
              end
              tbl,tags=extract_tags(tbl)
              col=m1.scan(/\d+/)
              rws=tbl.split(/\n/)
              rows=''
              rws.each do |r|
                r=r.gsub(/\s*\|\s*/m,"#{Mx[:tc_p]}")        #r.gsub!(/\|/m,"#{Mx[:tc_p]}")
                rows += r + Mx[:tc_c]
              end
              h={ head_: hd, cols: col.length, widths: col, obj: rows, idx: idx, tags: tags }
              t_o=SiSU_DAL_DocumentStructure::ObjectTable.new.table(h) unless h.nil?
              tuned_file << t_o
              h={ obj: 'table end' }                        #introduce a counter
              t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
              t_o
            end
          end
          t_o
        end
        if @@flag[:table]==:curls or @@flag[:table]==:tics
          if (@@flag[:table]==:curls \
          and t_o =~/^\}table/) \
          or (@@flag[:table]==:tics \
          and t_o =~/^[`]{3}(?:\s+[~-][#]|\s+\~\{.+?\}\~)?\s*$/)
            @@flag[:table]=:off
            headings,columns,widths,idx=@h[:head_],@h[:cols],@h[:widths],@h[:idx]
            @h={ head_: headings, cols: columns, widths: widths, idx: idx, obj: @rows }
            t_o=SiSU_DAL_DocumentStructure::ObjectTable.new.table(@h)
            tuned_file << t_o
            @h,@rows=nil,''
            h={ obj: 'table end' }                          #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
            t_o
          else
            if t_o.is_a?(String) \
            and t_o !~/^(?:table\{|[`]{3}\s+table)/
              t_o=t_o.gsub(/^\n+/m,''). #check added for ruby 1.9.2 not needed in 1.8 series (tested in v2)
                gsub(/\n+/m,"#{Mx[:tc_p]}")
              @rows += t_o + Mx[:tc_c]
            end
            t_o=nil
          end
        end
        if @@flag[:code]==:curls or @@flag[:code]==:tics
          if (@@flag[:code]==:curls and t_o =~/^\}code/) \
          or (@@flag[:code]==:tics and t_o =~/^[`]{3}(?:\s+[~-][#]|\s+\~\{.+?\}\~)?\s*$/)
            @@flag[:code]=:off
            obj=@tuned_code.join("\n")
            tags=[]
            h={ obj: obj, tags: tags, number_: @codeblock_numbered }
            t_o=SiSU_DAL_DocumentStructure::ObjectBlockTxt.new.code(h)
            @tuned_code=[]
            tuned_file << t_o
            h={ obj: 'code block end' }                     #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
          end
          if (@@flag[:code]==:curls or @@flag[:code]==:tics) \
          and t_o.is_a?(String)
            sub_array=t_o.dup + "#{Mx[:br_nl]}"
            @line_mode=[]
            sub_array.scan(/.+/) {|w| @line_mode << w if w =~/[\S]+/}
            t_o=SiSU_DAL_DocumentStructureExtract::Build.new(@md,@line_mode).build_lines(:code).join
            @tuned_code << t_o
            t_o=nil
          end
        elsif (@@flag[:poem]==:curls or @@flag[:poem]==:tics) \
        or (@@flag[:group]==:curls or @@flag[:group]==:tics) \
        or (@@flag[:block]==:curls or @@flag[:block]==:tics) \
        or (@@flag[:alt]==:curls or @@flag[:alt]==:tics)
          if (@@flag[:poem]==:curls and t_o =~/^\}poem/) \
          or (@@flag[:poem]==:tics and t_o =~/^[`]{3}(?:\s+[~-][#]|\s+\~\{.+?\}\~)?\s*$/)
            @@flag[:poem]=:off
            h={ obj: 'poem end' }                           #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
          elsif (@@flag[:group]==:curls and t_o =~/^\}group/) \
          or (@@flag[:group]==:tics and t_o =~/^[`]{3}(?:\s+[~-][#]|\s+\~\{.+?\}\~)?\s*$/)
            @@flag[:group]=:off
            obj,tags=extract_tags(@tuned_block.join("\n"))
            h={ obj: obj, tags: tags }
            @tuned_block=[]
            t_o=SiSU_DAL_DocumentStructure::ObjectBlockTxt.new.group(h)
            tuned_file << t_o
            h={ obj: 'group text end' }                     #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
          elsif (@@flag[:block]==:curls and t_o =~/^\}block/) \
          or (@@flag[:block]==:tics and t_o =~/^[`]{3}(?:\s+[~-][#]|\s+\~\{.+?\}\~)?\s*$/)
            @@flag[:block]=:off
            obj,tags=extract_tags(@tuned_block.join("\n"))
            h={ obj: obj, tags: tags }
            @tuned_block=[]
            t_o=SiSU_DAL_DocumentStructure::ObjectBlockTxt.new.block(h)
            tuned_file << t_o
            h={ obj: 'block text end' }                     #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
          elsif (@@flag[:alt]==:curls and t_o =~/^\}alt/) \
          or (@@flag[:alt]==:tics and t_o =~/^[`]{3}(?:\s+[~-][#]|\s+\~\{.+?\}\~)?\s*$/)
            @@flag[:alt]=:off
            obj,tags=extract_tags(@tuned_block.join("\n"))
            h={ obj: obj, tags: tags }
            t_o=SiSU_DAL_DocumentStructure::ObjectBlockTxt.new.alt(h)
            @tuned_block=[]
            tuned_file << t_o
            h={ obj: 'alt text end' }                       #introduce a counter
            t_o=SiSU_DAL_DocumentStructure::ObjectComment.new.comment(h)
          end
          if (@@flag[:poem]==:curls or @@flag[:poem]==:tics \
          or @@flag[:group]==:curls or @@flag[:group]==:tics \
          or @@flag[:alt]==:curls or @@flag[:alt]==:tics) \
          and t_o =~/\S/ \
          and t_o !~/^(?:\}(?:verse|code|alt|group|block)|(?:verse|code|alt|group|block)\{)/ \
          and t_o !~/^[`]{3}\s+(?:code|poem|alt|group|block)|^[`]{3}(?:\s+[~-][#]|\s+\~\{.+?\}\~)?\s*$/ # fix logic
            sub_array=t_o.dup
            @line_mode=sub_array.scan(/.+/)
            type=if @@flag[:poem]==:curls or @@flag[:poem]==:tics
              t_o=SiSU_DAL_DocumentStructureExtract::Build.new(@md,@line_mode).build_lines(type).join
              poem=t_o.split(/\n\n/)
              poem.each do |v|
                v=v.gsub(/\n/m,"#{Mx[:br_nl]}\n")
                obj,tags=extract_tags(v)
                h={ obj: obj, tags: tags }
                t_o=SiSU_DAL_DocumentStructure::ObjectBlockTxt.new.verse(h)
                tuned_file << t_o
              end
              :poem
            else :group
            end
          end
          @verse_count+=1 if @@flag[:poem]==:curls or @@flag[:poem]==:tics
        end
        if @@flag[:code]==:off
          if @@flag[:poem]==:curls or @@flag[:poem]==:tics \
          or @@flag[:group]==:curls or @@flag[:group]==:tics \
          or @@flag[:alt]==:curls or @@flag[:alt]==:tics
            if t_o.is_a?(String)
              t_o=t_o.gsub(/\n/m,"#{Mx[:br_nl]}").
                gsub(/[ ][ ]/m,"#{Mx[:nbsp]*2}").
                gsub(/#{Mx[:nbsp]}\s/,"#{Mx[:nbsp]*2}")
              t_o=t_o + Mx[:br_nl] if t_o =~/\S+/
            elsif t_o.is==:group \
            || t_o.is==:block \
            || t_o.is==:alt \
            || t_o.is==:verse
              t_o.obj=t_o.obj.gsub(/\n/m,"#{Mx[:br_nl]}").
                gsub(/[ ][ ]/m,"#{Mx[:nbsp]*2}").
                gsub(/#{Mx[:nbsp]}\s/,"#{Mx[:nbsp]*2}")
            end
            @tuned_block << t_o if t_o =~/\S+/
          else tuned_file << t_o
          end
        else tuned_file << t_o
        end
      end
      if @md.flag_endnotes
        tuned_file << @pb
        h={ ln: 2, obj: 'Endnotes', autonum_: false }
        tuned_file << SiSU_DAL_DocumentStructure::ObjectHeading.new.heading_insert(h)
        h={ ln: 4, obj: 'Endnotes', name: 'endnotes', autonum_: false }
        tuned_file << SiSU_DAL_DocumentStructure::ObjectHeading.new.heading_insert(h)
        h={ obj: 'Endnotes' }
      end
      if @md.book_idx
        tuned_file << @pb
        h={ ln: 2, obj: 'Index', autonum_: false }
        tuned_file << SiSU_DAL_DocumentStructure::ObjectHeading.new.heading_insert(h)
        h={ ln: 4, obj: 'Index', name: 'book_index', autonum_: false }
        tuned_file << SiSU_DAL_DocumentStructure::ObjectHeading.new.heading_insert(h)
        h={ obj: 'Index' }
      end
      tuned_file << @pb
      h={ ln: 2, obj: 'Metadata', autonum_: false, ocn_: false }
      tuned_file << SiSU_DAL_DocumentStructure::ObjectHeading.new.heading_insert(h)
      h={ ln: 4, obj: 'SiSU Metadata, document information', name: 'metadata', autonum_: false, ocn_: false }
      tuned_file << SiSU_DAL_DocumentStructure::ObjectHeading.new.heading_insert(h)
      h={ obj: 'eof' }
      meta=SiSU_DAL_DocumentStructure::ObjectMetadata.new.metadata(@metadata)
      [tuned_file,meta]
    end
    def table_rows_and_columns_array(table_str)
      table=[]
      table_str.split(/#{Mx[:tc_c]}/).each do |table_row|
        table_row_with_columns=table_row.split(/#{Mx[:tc_p]}/)
        table << table_row_with_columns
      end
      table
    end
    def meta_heading(h)
      h={ lv: h[:lv], ln: h[:ln], name: h[:name], obj: h[:obj], ocn: '0' }
      SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h)
    end
    def meta_para(str)
      h={ obj: str, ocn_: false }
      SiSU_DAL_DocumentStructure::ObjectPara.new.paragraph(h)
    end
    def build_lines(type=:none)
      lines,lines_new=@data,[]
      lines.each do |line|
        line=if line =~/\S/ \
        and line !~/^(?:code\{|\}code)/ \
        and line !~/^(?:[`]{3}\s+code|[`]{3}(?:\s+[~-][#]|\s+\~\{.+?\}\~)?\s*$)/ \
        and not line.is_a?(Hash) #watch
          @@counter+=1 if @@flag[:code]==:curls or @@flag[:code]==:tics
          line=line.gsub(/\s\s/,"#{Mx[:nbsp]*2}").
            gsub(/#{Mx[:nbsp]}\s/,"#{Mx[:nbsp]*2}")
          line=line.gsub(/^/,"#{Mx[:gr_o]}codeline#{Mx[:gr_c]}") if type==:code # REMOVE try sort for texpdf special case
          line=if line =~/(?:https?|file|ftp):\/\/\S+$/
            line.gsub(/\s*$/," #{Mx[:br_nl]}")
          else line.gsub(/\s*$/,"#{Mx[:br_nl]}") #unless type=='code'
          end
        elsif line =~/^\s*$/
          line.gsub(/\s*$/,"#{Mx[:br_nl]}")
        else line
        end
        lines_new << line
      end
      lines_new
    end
  end
  class Structure                                          # this must happen early
    def initialize(md,dob)
      @md,@dob=md,dob
    end
    def structure
      structure_markup
      @dob
    end
    def structure_markup                                   #build structure where structure provided only in meta header
      @dob=if @dob.is==:para \
      && (((@dob.hang !~/[1-9]/) && (@dob.indent !~/[1-9]/)) \
      || (@dob.hang != @dob.indent)) \
      and not @dob.bullet_
        @dob=case @dob.obj
        when /^#{@md.lv1}/
          h={ lv: 'A', ln: 1 }
          SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h,@dob)
        when /^#{@md.lv2}/
          h={ lv: 'B', ln: 2 }
          SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h,@dob)
        when /^#{@md.lv3}/
          h={ lv: 'C', ln: 3 }
          SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h,@dob)
        when /^#{@md.lv4}/
          h={ lv: '1', ln: 4 }
          SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h,@dob)
        when /^#{@md.lv5}/
          h={ lv: '2', ln: 5 }
          SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h,@dob)
        when /^#{@md.lv6}/
          h={ lv: '3', ln: 6 }
          SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h,@dob)
        else @dob
        end
      else @dob
      end
      @dob
    end
  end
  class OCN
    def initialize(md,data)
      @md,@data=md,data
    end
    def ocn                                                                      #and auto segment numbering increment
      data=@data
      @o_array=[]
      node=ocn=ocn_dv=ocn_sp=ocnh=ocnh1=ocnh2=ocnh3=ocnh4=ocnh5=ocnh6=ocno=ocnp=ocnt=ocnc=ocng=ocni=ocnu=0 # h heading, o other, t table, g group, i image
      regex_exclude_ocn_and_node = /#{Rx[:meta]}|^@\S+?:\s|^4~endnotes|^#{Mx[:lv_o]}4:endnotes#{Mx[:lv_c]}|^\^~ |<:e[:_]\d+?>|^<:\#|<:- |<[:!]!4|<hr width|#{Mx[:br_endnotes]}|\A\s*\Z/mi #ocn here #&nbsp; added with Tune.code #¡
      parent=node1=node2=node3=node4=node5=node6=nil
      data.each do |dob|
        h={}
        if (dob.obj !~ regex_exclude_ocn_and_node || dob.is==:code) \
        && (dob.of !=:comment \
        && dob.of !=:layout \
        && dob.of !=:meta) \
        && dob.obj !~/#{Mx[:pa_non_object_no_heading]}|#{Mx[:pa_non_object_dummy_heading]}/ \
        && dob.ocn_
          #dob.ln now is determined, and set earlier, check how best to remove this -->
          if dob.is==:heading
             ln=case dob.lv
             when 'A'; 1
             when 'B'; 2
             when 'C'; 3
             when '1'; 4
             when '2'; 5
             when '3'; 6
             when '4'; 7
             when '5'; 8
             when '6'; 9
             end
          end
          if not dob.obj =~/<:#>|~#|-#/ \
          or not dob.toc_                                  # fix this no longer in dob.obj
            ocn+=1
            if dob.is==:heading \
            and (ln.to_s =~/^[1-9]/ \
            or ln.to_s =~@md.lv1 \
            or ln.to_s =~@md.lv2 \
            or ln.to_s =~@md.lv3 \
            or ln.to_s =~@md.lv4 \
            or ln.to_s =~@md.lv5 \
            or ln.to_s =~@md.lv6)
              ocnh+=1
              if ln==1 \
              or ln=~@md.lv1; ocnh1+=1                     #heading
                node1="1:#{ocnh1};#{ocn}"
                node,ocn_sp,parent=node1,"h#{ocnh}",0 #FIX
              elsif ln==2 \
              or ln=~@md.lv2; ocnh2+=1
                node2="2:#{ocnh2};#{ocn}"
                node,ocn_sp,parent=node2,"h#{ocnh}",node1
              elsif ln==3 \
              or ln=~@md.lv3; ocnh3+=1
                node3="3:#{ocnh3};#{ocn}"
                node,ocn_sp,parent=node3,"h#{ocnh}",node2
              elsif ln==4 \
              or ln=~@md.lv4; ocnh4+=1
                node4="4:#{ocnh4};#{ocn}"
                node,ocn_sp,parent=node4,"h#{ocnh}",node3
              elsif ln==5 \
              or ln=~@md.lv5; ocnh5+=1
                node5="5:#{ocnh5};#{ocn}"
                node,ocn_sp,parent=node5,"h#{ocnh}",node4
              elsif ln==6 \
              or ln=~@md.lv6; ocnh6+=1
                node6="6:#{ocnh6};#{ocn}"
                node,ocn_sp,parent=node6,"h#{ocnh}",node5
              end
            else
              ocno+=1
              if dob.is==:table
                ocnt+=1
                ocn_sp,parent="t#{ocnt}",node
              elsif dob.is==:code
                ocnc+=1
                ocn_sp,parent="c#{ocnc}",node
              elsif dob.is==:group \
              || dob.is==:block \
              || dob.is==:alt \
              || dob.is==:verse
                ocng+=1 #group, poem
                ocn_sp,parent="g#{ocng}",node
              elsif dob.is==:image #check
                ocni+=1
                ocn_sp,parent="i#{ocni}",node
              else ocnp+=1                                 #paragraph
                ocn_sp,parent="p#{ocnp}",node
              end
            end
            if dob.is==:heading
              dob.ln,dob.node,dob.ocn,dob.odv,dob.osp,dob.parent=ln,node,ocn,ocn_dv,ocn_sp,parent
            else
              if dob.of !=:meta \
              && dob.of !=:comment \
              && dob.of !=:layout
                dob.ocn,dob.odv,dob.osp,dob.parent=ocn,ocn_dv,ocn_sp,parent
              end
            end
          else ocnu+=1
            dob.obj=dob.obj.gsub(/#{Mx[:fa_o]}~##{Mx[:fa_c]}/,'') if dob.obj
            ocn_dv,ocn_sp="u#{ocnu}","u#{ocnu}"
            dob.ocn,dob.odv,dob.osp=ocn,ocn_dv,ocn_sp
          end
          h
        elsif dob.obj=~/#{Mx[:pa_non_object_no_heading]}/
          dob.obj=dob.obj.gsub(/#{Mx[:pa_non_object_no_heading]}/,'')
          if dob.is==:para
            h={ obj: dob.obj, ocn_: false, ocn: nil, hang: dob.hang, indent: dob.indent, bullet_: dob.bullet_, tags: dob.tags, parent: dob.parent }
            dob=SiSU_DAL_DocumentStructure::ObjectPara.new.paragraph(h,dob)
          elsif dob.is==:heading
            h={ obj: dob.obj, ocn_: false, ocn: nil, toc_: true, parent: dob.parent }
            dob=SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h,dob)
          end
        elsif dob.obj=~/#{Mx[:pa_non_object_dummy_heading]}/
          dob.obj=dob.obj.gsub(/#{Mx[:pa_non_object_dummy_heading]}/,'')
          if dob.is==:para
            h={ obj: dob.obj, ocn_: false, ocn: nil, hang: dob.hang, indent: dob.indent, bullet_: dob.bullet_, tags: dob.tags, parent: dob.parent }
            dob=SiSU_DAL_DocumentStructure::ObjectPara.new.paragraph(h,dob)
          elsif dob.is==:heading
            h={ obj: dob.obj, ocn_: false, ocn: nil, toc_: false, parent: dob.parent }
            dob=SiSU_DAL_DocumentStructure::ObjectHeading.new.heading(h,dob)
          end
        else dob
        end
        if dob.is==:code \
        || dob.is==:verse \
        || dob.is==:alt \
        || dob.is==:group \
        || dob.is==:block
          dob.obj=dob.obj.gsub(/\n\n/,"\n") #newlines taken out
        end
        @o_array << dob
      end
      @o_array
    end
  end
  class XML
    def initialize(md,data)
      @data,@md=data,md
    end
    def dom
      @s=['0',
        'A',
        'B',
        'C',
        '1',
        '2',
        '3'
      ]
      @sp='  '
      tuned_file=structure_build
      tuned_file
    end
    def structure_build
      data=@data
      tuned_file=[]
      hs=[0,false,false,false]
      t={ lv: @s[0], status: 'open' }
      tuned_file << tags(t)
      if @md.opt.cmd =~/V/
        puts "\nXML sisu structure outline --->\n"
        puts "<#{@s[0]}>"
      end
      data.each_with_index do |o,i|
        if o.is==:heading \
        || o.is==:heading_insert
          case o.ln
          when 1
            tuned_file << tag_close(o.ln,hs)
            tuned_file << tag_open(o,@s)
            if @md.opt.cmd =~/V/
              puts_tag_close(o.ln,hs)
              puts_tag_open(o,@s)
            end
            hs=[1,true,false,false]
          when 2
            tuned_file << tag_close(o.ln,hs)
            tuned_file << tag_open(o,@s)
            if @md.opt.cmd =~/V/
              puts_tag_close(o.ln,hs)
              puts_tag_open(o,@s)
            end
            hs=[2,true,true,false]
          when 3
            tuned_file << tag_close(o.ln,hs)
            tuned_file << tag_open(o,@s)
            if @md.opt.cmd =~/V/
              puts_tag_close(o.ln,hs)
              puts_tag_open(o,@s)
            end
            hs=[3,true,true,true]
          when 4
            tuned_file << tag_close(o.ln,hs)
            tuned_file << tag_open(o,@s)
            if @md.opt.cmd =~/V/
              puts_tag_close(o.ln,hs)
              puts_tag_open(o,@s)
            end
            hs[0]=4
          when 5
            tuned_file << tag_close(o.ln,hs)
            tuned_file << tag_open(o,@s)
            if @md.opt.cmd =~/V/
              puts_tag_close(o.ln,hs)
              puts_tag_open(o,@s)
            end
            hs[0]=5
          when 6
            tuned_file << tag_close(o.ln,hs)
            tuned_file << tag_open(o,@s)
            if @md.opt.cmd =~/V/
              puts_tag_close(o.ln,hs)
              puts_tag_open(o,@s)
            end
            hs[0]=6
          end
        end
        tuned_file << o
      end
      puts_tag_close(0,hs) if @md.opt.cmd =~/V/
      tuned_file << tag_close(0,hs)
      tuned_file=tuned_file.flatten
    end
    def tags(o)
      tag=(o[:status]=='open') \
      ? %{<#{o[:lv]} id="#{o[:node]}">}
      : "</#{o[:lv]}>"
      ln=case o[:lv]
      when 'A'; 1
      when 'B'; 2
      when 'C'; 3
      when '1'; 4
      when '2'; 5
      when '3'; 6
      when '4'; 7
      when '5'; 8
      when '6'; 9
      end
      h={ tag: tag, node: o[:node], lv: o[:lv], ln: ln, status: o[:status] }
      SiSU_DAL_DocumentStructure::ObjectStructure.new.xml_dom(h) #downstream code utilise else ignore like comments
    end
    def tag_open(o,tag)
      t={ lv: tag[o.ln], node: o.node, status: 'open' }
      t_o=tags(t)
      t_o
    end
    def tag_close(lev,hs)
      ary=[]
      case hs[0]
      when 1
        if (lev <= 1) and hs[1]
          t={ lv: @s[1], status: 'close' }
          ary << tags(t)
        end
        if (lev==0)
          t={ lv: @s[0], status: 'close' }
          ary << tags(t)
        end
      when 2
        if (lev <= 2) and hs[2]
          t={ lv: @s[2], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 1) and hs[1]
          t={ lv: @s[1], status: 'close' }
          ary << tags(t)
        end
        if (lev==0)
          t={ lv: @s[0], status: 'close' }
          ary << tags(t)
        end
      when 3
        if (lev <= 3) and hs[3]
          t={ lv: @s[3], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 2) and hs[2]
          t={ lv: @s[2], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 1) and hs[1]
          t={ lv: @s[1], status: 'close' }
          ary << tags(t)
        end
        if (lev==0)
          t={ lv: @s[0], status: 'close' }
          ary << tags(t)
        end
      when 4
        if (lev <= 4)
          t={ lv: @s[4], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 3) and hs[3]
          t={ lv: @s[3], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 2) and hs[2]
          t={ lv: @s[2], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 1) and hs[1]
          t={ lv: @s[1], status: 'close' }
          ary << tags(t)
        end
        if (lev==0)
          t={ lv: @s[0], status: 'close' }
          ary << tags(t)
        end
      when 5
        if (lev <= 5)
          t={ lv: @s[5], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 4)
          t={ lv: @s[4], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 3) and hs[3]
          t={ lv: @s[3], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 2) and hs[2]
          t={ lv: @s[2], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 1) and hs[1]
          t={ lv: @s[1], status: 'close' }
          ary << tags(t)
        end
        if (lev==0)
          t={ lv: @s[0], status: 'close' }
          ary << tags(t)
        end
      when 6
        if (lev <= 6)
          t={ lv: @s[6], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 5)
          t={ lv: @s[5], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 4)
          t={ lv: @s[4], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 3) and hs[3]
          t={ lv: @s[3], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 2) and hs[2]
          t={ lv: @s[2], status: 'close' }
          ary << tags(t)
        end
        if (lev <= 1) and hs[1]
          t={ lv: @s[1], status: 'close' }
          ary << tags(t)
        end
        if (lev==0)
          t={ lv: @s[0], status: 'close' }
          ary << tags(t)
        end
      end
      ary
    end
    def puts_tag_open(o,tag)
      puts %{#{@sp*o.ln}<#{tag[o.ln]} id="#{o.node}">}
    end
    def puts_tag_close(lev,hs)
      case hs[0]
      when 1
        puts "#{@sp*1}</#{@s[1]}>" if (lev <= 1) and hs[1]
        puts "</#{@s[0]}>"         if (lev==0)
      when 2
        puts "#{@sp*2}</#{@s[2]}>" if (lev <= 2) and hs[2]
        puts "#{@sp*1}</#{@s[1]}>" if (lev <= 1) and hs[1]
        puts "</#{@s[0]}>"         if (lev==0)
      when 3
        puts "#{@sp*3}</#{@s[3]}>" if (lev <= 3) and hs[3]
        puts "#{@sp*2}</#{@s[2]}>" if (lev <= 2) and hs[2]
        puts "#{@sp*1}</#{@s[1]}>" if (lev <= 1) and hs[1]
        puts "</#{@s[0]}>"         if (lev==0)
      when 4
        puts "#{@sp*4}</#{@s[4]}>" if (lev <= 4)
        puts "#{@sp*3}</#{@s[3]}>" if (lev <= 3) and hs[3]
        puts "#{@sp*2}</#{@s[2]}>" if (lev <= 2) and hs[2]
        puts "#{@sp*1}</#{@s[1]}>" if (lev <= 1) and hs[1]
        puts "</#{@s[0]}>"         if (lev==0)
      when 5
        puts "#{@sp*5}</#{@s[5]}>" if (lev <= 5)
        puts "#{@sp*4}</#{@s[4]}>" if (lev <= 4)
        puts "#{@sp*3}</#{@s[3]}>" if (lev <= 3) and hs[3]
        puts "#{@sp*2}</#{@s[2]}>" if (lev <= 2) and hs[2]
        puts "#{@sp*1}</#{@s[1]}>" if (lev <= 1) and hs[1]
        puts "</#{@s[0]}>"         if (lev==0)
      when 6
        puts "#{@sp*6}</#{@s[6]}>" if (lev <= 6)
        puts "#{@sp*5}</#{@s[5]}>" if (lev <= 5)
        puts "#{@sp*4}</#{@s[4]}>" if (lev <= 4)
        puts "#{@sp*3}</#{@s[3]}>" if (lev <= 3) and hs[3]
        puts "#{@sp*2}</#{@s[2]}>" if (lev <= 2) and hs[2]
        puts "#{@sp*1}</#{@s[1]}>" if (lev <= 1) and hs[1]
        puts "</#{@s[0]}>"         if (lev==0)
      end
    end
  end
end
__END__