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+-*- mode: org -*-
+#+TITLE:       sisu object munge
+#+DESCRIPTION: documents - structuring, various output representations & search
+#+FILETAGS:    :sisu:munge:objects:
+#+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
+
+* object_munge.rb
+
+#+BEGIN_SRC ruby  :tangle "../lib/sisu/object_munge.rb"
+# <<sisu_document_header>>
+module SiSU_Object_Munge
+  def i_src_o_strip_markup(txtobj)
+    txtobj=txtobj.
+      gsub(/#{Mx[:srcrgx_bold_o]}(.+?)#{Mx[:srcrgx_bold_c]}/m,'\1').
+      gsub(/#{Mx[:srcrgx_italics_o]}(.+?)#{Mx[:srcrgx_italics_c]}/m,'\1').
+      gsub(/#{Mx[:srcrgx_underscore_o]}(.+?)#{Mx[:srcrgx_underscore_c]}/m,'\1').
+      gsub(/#{Mx[:srcrgx_cite_o]}(.+?)#{Mx[:srcrgx_cite_c]}/m,'\1').
+      gsub(/#{Mx[:srcrgx_insert_o]}(.+?)#{Mx[:srcrgx_insert_c]}/m,'\1').
+      gsub(/#{Mx[:srcrgx_strike_o]}(.+?)#{Mx[:srcrgx_strike_c]}/m,'\1').
+      gsub(/#{Mx[:srcrgx_superscript_o]}(\d+)#{Mx[:srcrgx_superscript_c]}/m,'[\1]').
+      gsub(/#{Mx[:srcrgx_superscript_o]}(.+?)#{Mx[:srcrgx_superscript_c]}/m,'\1').
+      gsub(/#{Mx[:srcrgx_subscript_o]}(.+?)#{Mx[:srcrgx_subscript_c]}/m,'\1').
+      gsub(/#{Mx[:srcrgx_hilite_o]}(.+?)#{Mx[:srcrgx_hilite_c]}/m,'\1').
+      gsub(/#{Mx[:gl_o]}#(?:126|152)#{Mx[:gl_c]}/i,'~').
+      gsub(/#{Mx[:en_a_o]}([\d*+]+)\s+(?:.+?)#{Mx[:en_a_c]}/m,''). # endnote removed
+      gsub(/#{Mx[:en_b_o]}([\d*+]+)\s+(?:.+?)#{Mx[:en_b_c]}/m,''). # endnote removed
+      gsub(/(?:#{Mx[:nbsp]})+/,' ').
+      gsub(/(?:#{Mx[:br_nl]})+/,"\n").
+      gsub(/(?:#{Mx[:br_paragraph]})+/,"\n").
+      gsub(/(?:#{Mx[:br_line]})+/,"\n").
+      gsub(/#{Mx[:gl_o]}(?:#lt|#060)#{Mx[:gl_c]}/,'<').
+      gsub(/#{Mx[:gl_o]}(?:#gt|#062)#{Mx[:gl_c]}/,'>').
+      gsub(/#{Mx[:gl_o]}#(?:038|amp)#{Mx[:gl_c]}/,'&').
+      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]}#045#{Mx[:gl_c]}/,'-').
+      gsub(/#{Mx[:gl_o]}#047#{Mx[:gl_c]}/,'/').
+      gsub(/#{Mx[:gl_o]}#095#{Mx[:gl_c]}/,'_').
+      gsub(/#{Mx[:gl_o]}#123#{Mx[:gl_c]}/,'{').
+      gsub(/#{Mx[:gl_o]}#125#{Mx[:gl_c]}/,'}').
+      gsub(/#{Mx[:gl_o]}#126#{Mx[:gl_c]}/,'~').
+      gsub(/#{Mx[:gl_o]}#169#{Mx[:gl_c]}/,'©').
+      gsub(/[ ][ ]s+/,' ').
+      strip
+if txtobj =~/Reading this/
+  puts txtobj
+  if txtobj =~ /#{Mx[:srcrgx_italics_o]}(.+?)#{Mx[:srcrgx_italics_c]}/
+    puts __LINE__
+    puts Mx[:srcrgx_italics_o]
+    puts txtobj
+  end
+end
+; txtobj
+  end
+  def i_ao_o_strip_markup(txtobj)
+    txtobj=txtobj.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_cite_o]}(.+?)#{Mx[:fa_cite_c]}/,'\1').
+      gsub(/#{Mx[:fa_insert_o]}(.+?)#{Mx[:fa_insert_c]}/,'\1').
+      gsub(/#{Mx[:fa_strike_o]}(.+?)#{Mx[:fa_strike_c]}/,'\1').
+      gsub(/#{Mx[:fa_superscript_o]}(\d+)#{Mx[:fa_superscript_c]}/,'[\1]').
+      gsub(/#{Mx[:fa_superscript_o]}(.+?)#{Mx[:fa_superscript_c]}/,'\1').
+      gsub(/#{Mx[:fa_subscript_o]}(.+?)#{Mx[:fa_subscript_c]}/,'\1').
+      gsub(/#{Mx[:fa_hilite_o]}(.+?)#{Mx[:fa_hilite_c]}/,'\1').
+      gsub(/#{Mx[:gl_o]}#(?:126|152)#{Mx[:gl_c]}/i,'~').
+      gsub(/#{Mx[:en_a_o]}([\d*+]+)\s+(?:.+?)#{Mx[:en_a_c]}/,''). # endnote removed
+      gsub(/#{Mx[:en_b_o]}([\d*+]+)\s+(?:.+?)#{Mx[:en_b_c]}/,''). # endnote removed
+      gsub(/(?:#{Mx[:nbsp]})+/,' ').
+      gsub(/(?:#{Mx[:br_nl]})+/,"\n").
+      gsub(/(?:#{Mx[:br_paragraph]})+/,"\n").
+      gsub(/(?:#{Mx[:br_line]})+/,"\n").
+      gsub(/#{Mx[:gl_o]}(?:#lt|#060)#{Mx[:gl_c]}/,'<').
+      gsub(/#{Mx[:gl_o]}(?:#gt|#062)#{Mx[:gl_c]}/,'>').
+      gsub(/#{Mx[:gl_o]}#(?:038|amp)#{Mx[:gl_c]}/,'&').
+      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]}#045#{Mx[:gl_c]}/,'-').
+      gsub(/#{Mx[:gl_o]}#047#{Mx[:gl_c]}/,'/').
+      gsub(/#{Mx[:gl_o]}#095#{Mx[:gl_c]}/,'_').
+      gsub(/#{Mx[:gl_o]}#123#{Mx[:gl_c]}/,'{').
+      gsub(/#{Mx[:gl_o]}#125#{Mx[:gl_c]}/,'}').
+      gsub(/#{Mx[:gl_o]}#126#{Mx[:gl_c]}/,'~').
+      gsub(/#{Mx[:gl_o]}#169#{Mx[:gl_c]}/,'©').
+      gsub(/[ ][ ]s+/,' ').
+      strip
+  end
+  def i_ao_o_src_markup_restore(txtobj)
+    @txtobj=txtobj
+    def textface_marks
+      @txtobj.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_cite_o]}(.+?)#{Mx[:fa_cite_c]}/,'"{\1}"').
+        gsub(/#{Mx[:fa_insert_o]}(.+?)#{Mx[:fa_insert_c]}/,'+{\1}+').
+        gsub(/#{Mx[:fa_strike_o]}(.+?)#{Mx[:fa_strike_c]}/,'-{\1}-').
+        gsub(/#{Mx[:fa_superscript_o]}(\d+)#{Mx[:fa_superscript_c]}/,'^{[\1]}^').
+        gsub(/#{Mx[:fa_superscript_o]}(.+?)#{Mx[:fa_superscript_c]}/,'^{\1}^').
+        gsub(/#{Mx[:fa_subscript_o]}(.+?)#{Mx[:fa_subscript_c]}/,',{\1},').
+        gsub(/#{Mx[:fa_hilite_o]}(.+?)#{Mx[:fa_hilite_c]}/,'\1').
+        gsub(/#{Mx[:gl_o]}#(?:126|152)#{Mx[:gl_c]}/i,'~').
+        gsub(/#{Mx[:en_a_o]}([\d*+]+)\s+(?:.+?)#{Mx[:en_a_c]}/,'~{\1 \2}~').
+        gsub(/#{Mx[:en_b_o]}([\d*+]+)\s+(?:.+?)#{Mx[:en_b_c]}/,''). # endnote removed
+        gsub(/(?:#{Mx[:nbsp]})+/,' ').
+        gsub(/(?:#{Mx[:br_nl]})+/,"\n").
+        gsub(/(?:#{Mx[:br_paragraph]})+/,"\n").
+        gsub(/(?:#{Mx[:br_line]})+/,"\n").
+        gsub(/#{Mx[:gl_o]}(?:#lt|#060)#{Mx[:gl_c]}/,'<').
+        gsub(/#{Mx[:gl_o]}(?:#gt|#062)#{Mx[:gl_c]}/,'>').
+        gsub(/#{Mx[:gl_o]}#(?:038|amp)#{Mx[:gl_c]}/,'&').
+        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]}#045#{Mx[:gl_c]}/,'-').
+        gsub(/#{Mx[:gl_o]}#047#{Mx[:gl_c]}/,'/').
+        gsub(/#{Mx[:gl_o]}#095#{Mx[:gl_c]}/,'_').
+        gsub(/#{Mx[:gl_o]}#123#{Mx[:gl_c]}/,'{').
+        gsub(/#{Mx[:gl_o]}#125#{Mx[:gl_c]}/,'}').
+        gsub(/#{Mx[:gl_o]}#126#{Mx[:gl_c]}/,'~').
+        gsub(/#{Mx[:gl_o]}#169#{Mx[:gl_c]}/,'©').
+        gsub(/[ ][ ]s+/,' ').
+        strip
+    end
+    def object_marks
+      @txtobj
+    end
+    self
+  end
+  def clean_text(txtobj,markup=:ao)
+    if txtobj.class==String
+      txtobj=if markup ==:ao
+        i_ao_o_strip_markup(txtobj)
+      elsif markup ==:src
+        i_src_o_strip_markup(txtobj)
+      else p __FILE__; p __LINE__
+      end
+    elsif txtobj.class.inspect=~/^SiSU_AO_DocumentStructure::/
+      txtobj.obj=i_ao_o_strip_markup(txtobj.obj)
+    else p 'error'
+    end
+    txtobj
+  end
+  def footnotes_inline(txtobj)
+  end
+  def footnotes_ref_and_note(txtobj)
+  end
+  def src_markup(txtobj)
+    txtobj
+  end
+  def extract_endnotes(doc_obj_txt,endnotes_)               #% used for extraction of endnotes from paragraphs
+    if endnotes_ ==:separate
+      notes_a=doc_obj_txt.scan(/#{Mx[:en_a_o]}([\d]+\s+.+?)#{Mx[:en_a_c]}/)
+      ##notes_a=doc_obj_txt.scan(/#{Mx[:en_a_o]}([\d*+]+\s+.+?)#{Mx[:en_a_c]}/)
+      #notes_b=doc_obj_txt.scan(/#{Mx[:en_b_o]}([\d*+]+\s+.+?)#{Mx[:en_b_c]}/)
+      n=[]
+      notes_a.flatten.each do |note| #high cost to deal with <br> appropriately within plaintext, consider
+        note=note.dup.to_s
+        note=note.gsub(/^([\d]+)\s+/,'^~\1 ').
+          gsub(/#{Mx[:br_line]}|#{Mx[:br_nl]}/,
+            ' \\\\\\ ')
+        n << note
+      end
+      notes_a=n.flatten
+      doc_obj_txt=doc_obj_txt.
+        gsub(/#{Mx[:en_a_o]}([\d]+)\s+(?:.+?)#{Mx[:en_a_c]}/,'~^')   # endnote marker marked up
+    else
+      doc_obj_txt=doc_obj_txt.
+        gsub(/#{Mx[:en_b_o]}[\d]+\s+(.+?)#{Mx[:en_b_c]}/,
+          '~[ \1 ]~').     # inline endnote with marker marked up
+        gsub(/#{Mx[:en_a_o]}([*+]+)\s+(.+?)#{Mx[:en_a_c]}/,
+          '~{\1 \2 }~'). # inline endnote with marker marked up
+        gsub(/#{Mx[:en_b_o]}([*+]+)\s+(.+?)#{Mx[:en_b_c]}/,
+          '~[\1 \2 ]~') # inline endnote with marker marked up
+    end
+    [doc_obj_txt,notes_a]
+  end
+  def objects #def i_ao_o_src_markup_restore(txtobj)
+    def code_(dob)
+      if dob.is==:code
+        dob.obj=dob.obj.gsub(/(^|[^}])_([<>])/m,'\1\2'). # _> _<
+          gsub(/(^|[^}])_([<>])/m,'\1\2') # _<_<
+      end
+      dob
+    end
+    def block_(dob)
+      dob.obj=if dob.of==:block                                   # watch
+        dob.obj.gsub(/#{Mx[:gl_o]}●#{Mx[:gl_c]}/,"* ").
+          gsub(/#{Mx[:br_line]}|#{Mx[:br_nl]}/,"\n")
+      else dob.obj.gsub(/#{Mx[:br_line]}|#{Mx[:br_nl]}/,"\n\n")
+      end
+      dob
+    end
+    def textface_marks_po4a(dob,endnotes_=:inline)
+      notes=''
+      dob.obj=dob.obj.
+        gsub(/#{Mx[:fa_bold_o]}(.+?)#{Mx[:fa_bold_c]}/,
+          Mx[:src_bold_o] + '\1' + Mx[:src_bold_c]).
+        gsub(/#{Mx[:fa_italics_o]}(.+?)#{Mx[:fa_italics_c]}/,
+          Mx[:src_italics_o] + '\1' + Mx[:src_italics_c]).
+        gsub(/#{Mx[:fa_underscore_o]}(.+?)#{Mx[:fa_underscore_c]}/,
+          Mx[:src_underscore_o] + '\1' + Mx[:src_underscore_c]).
+        gsub(/#{Mx[:fa_subscript_o]}(.+?)#{Mx[:fa_subscript_c]}/,
+          Mx[:src_subscript_o] + '\1' + Mx[:src_subscript_c]).
+        gsub(/#{Mx[:fa_superscript_o]}(.+?)#{Mx[:fa_superscript_c]}/,
+          Mx[:src_superscript_o] + '\1' + Mx[:src_superscript_c]).
+        gsub(/#{Mx[:fa_insert_o]}(.+?)#{Mx[:fa_insert_c]}/,
+          Mx[:src_insert_o] + '\1' + Mx[:src_insert_c]).
+        gsub(/#{Mx[:fa_cite_o]}(.+?)#{Mx[:fa_cite_c]}/,
+          Mx[:src_cite_o] + '\1' + Mx[:src_cite_c]).
+        gsub(/#{Mx[:fa_strike_o]}(.+?)#{Mx[:fa_strike_c]}/,
+          Mx[:src_strike_o] + '\1' + Mx[:src_strike_c]).
+        gsub(/#{Mx[:fa_monospace_o]}(.+?)#{Mx[:fa_monospace_c]}/,
+          Mx[:src_monospace_o] + '\1' + Mx[:src_monospace_c])
+      unless dob.is==:code
+        dob.obj=dob.obj.
+          gsub(/#{Mx[:lnk_o]}(.+?)#{Mx[:lnk_c]}#{Mx[:rel_o]}\S+?#{Mx[:rel_c]}/,'\1').
+          gsub(/#{Mx[:url_o]}_(\S+?)#{Mx[:url_c]}/,'\1').
+          gsub(/#{Mx[:lnk_o]}(.+?)#{Mx[:lnk_c]}#{Mx[:url_o]}(\S+?)#{Mx[:url_c]}/,
+            '\1 [link: <\2>]').
+          gsub(/#{Mx[:lnk_o]}(.+?)#{Mx[:lnk_c]}image/,
+            '\1 [link: local image]').
+          gsub(/#{Mx[:url_o]}(\S+?)#{Mx[:url_c]}/,'\1')
+        dob.obj,notes=extract_endnotes(dob.obj,endnotes_)
+        dob.obj=dob.obj.
+          gsub(/#{Mx[:gl_o]}(?:#lt|#060)#{Mx[:gl_c]}/,'<').
+          gsub(/#{Mx[:gl_o]}(?:#gt|#062)#{Mx[:gl_c]}/,'>').
+          gsub(/#{Mx[:gl_o]}#(?:038|amp)#{Mx[:gl_c]}/,'&').
+          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]}#045#{Mx[:gl_c]}/,'-').
+          gsub(/#{Mx[:gl_o]}#047#{Mx[:gl_c]}/,'/').
+          gsub(/#{Mx[:gl_o]}#095#{Mx[:gl_c]}/,'_').
+          gsub(/#{Mx[:gl_o]}#123#{Mx[:gl_c]}/,'{').
+          gsub(/#{Mx[:gl_o]}#125#{Mx[:gl_c]}/,'}').
+          gsub(/#{Mx[:gl_o]}#126#{Mx[:gl_c]}/,'~').
+          gsub(/#{Mx[:gl_o]}#169#{Mx[:gl_c]}/,'©')
+      end
+      dob=block_(dob)
+      dob=code_(dob)
+      dob.obj=dob.obj.gsub(/#{Mx[:br_page]}\s*|#{Mx[:br_page_new]}/,''). # remove page breaks
+        gsub(/#{Mx[:url_o]}_(\S+?)#{Mx[:url_c]}/,'\1').
+        gsub(/#{Mx[:mk_o]}:name#(\S+?)#{Mx[:mk_c]}/,'').                 # remove name links
+        gsub(/&nbsp;|#{Mx[:nbsp]}/,' ').                                 # decide on
+        gsub(/(?:^|[^_\\])#{Mx[:lnk_o]}(\S+?\.(?:png|jpg|gif)) .+?#{Mx[:lnk_c]}#{Mx[:url_o]}\S+?#{Mx[:url_c]}/,
+          '    [ \1 ]'). #"[ #{dir.url.images_local}\/\\1 ]")
+        gsub(/(?:^|[^_\\])#{Mx[:lnk_o]}(\S+?\.(?:png|jpg|gif)) .+?#{Mx[:lnk_c]}image/,
+          '    [ \1 ]'). #"[ #{dir.url.images_local}\/\\1 ]")
+        gsub(/(?:^|[^_\\])\{\s*\S+?\.(?:png|jpg|gif)\s+.+?"(.*?)"\s*\}\S+/,
+          '[image: "\1"]')
+      [dob,notes]
+    end
+    def object_marks
+      @txtobj
+    end
+    self
+  end
+end
+__END__
+#+END_SRC
+
+* document header
+
+#+NAME: sisu_document_header
+#+BEGIN_SRC text
+encoding: utf-8
+- Name: SiSU
+
+  - Description: documents, structuring, processing, publishing, search
+    object_munge
+
+  - 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