=begin
 * Name: SiSU information Structuring Universe - Structured information, Serialized Units
 * Author: Ralph Amissah
   * http://www.jus.uio.no/sisu
   * http://www.jus.uio.no/sisu/SiSU/download.html

 * Description: xml output (sax style) processing

 * Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Ralph Amissah

 * License: GPL 2 or later

  Summary of GPL 2

  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 2 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, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA

  If you have Internet connection, the latest version of the GPL should be
  available at these locations:
    http://www.fsf.org/licenses/gpl.html
    http://www.gnu.org/copyleft/gpl.html
    http://www.jus.uio.no/sisu/gpl2.fsf

  SiSU was first released to the public on January 4th 2005

  SiSU uses:

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

  © Ralph Amissah 1997, current 2007.
  All Rights Reserved.

 * Ralph Amissah: ralph@amissah.com
                  ralph.amissah@gmail.com

 * Notes: tidy -xml sax.xml >> index.tidy
=end
module SiSU_document_structure
  require "#{SiSU_lib}/dal_doc_str_tables"
  require "#{SiSU_lib}/dal_doc_str_code"
  class Structure
    def initialize(md,para)
      @md,@para=md,para
    end
    def structure
      structure_markup_normalize
      structure_markup
      @para
    end
    def structure_markup
      @para=unless @para =~/[0-6]~/
        @para=case @para
        when /^\s*#{@md.lv1}/; @para.sub!(/(?:<[:!]1!?>\s*)?(.+)/,'1~ \1') if @para !~/^1~/
        when /^\s*#{@md.lv2}/; @para.sub!(/(?:<[:!]2!?>\s*)?(.+)/,'2~ \1') if @para !~/^2~/
        when /^\s*#{@md.lv3}/; @para.sub!(/(?:<[:!]3!?>\s*)?(.+)/,'3~ \1') if @para !~/^3~/
        when /^\s*#{@md.lv4}/; @para.sub!(/(?:<[:!]4!?>\s*)?(.+)/,'4~ \1') if @para !~/^4~/
        when /^\s*#{@md.lv5}/; @para.sub!(/(?:<[:!]5!?>\s*)?(.+)/,'5~ \1') if @para !~/^5~/
        when /^\s*#{@md.lv6}/; @para.sub!(/(?:<[:!]6!?>\s*)?(.+)/,'6~ \1') if @para !~/^6~/
        else @para
        end
      else @para
      end
    end
    def structure_markup_normalize
      para=if @md.markup_version.to_f >= 0.38                       #%convert internal representation, consider making 0.38 structure default ([A-C1-6] instead of [1-9]), requires downstream changes
        #keep and implement, requires downstream changes:
          #@para.gsub!(/^6~/,'9~')
          #@para.gsub!(/^5~/,'8~')
          #@para.gsub!(/^4~/,'7~')
        @para.gsub!(/^[456]~/,'!_')
        @para.gsub!(/^3~/,'6~')
        @para.gsub!(/^2~/,'5~')
        @para.gsub!(/^1~/,'4~')
        @para.gsub!(/^:?C~/,'3~')
        @para.gsub!(/^:?B~/,'2~')
        @para.gsub!(/^:?A~/,'1~')
        @para=if @para =~/^@(?:level|markup):\s/
          @para.gsub!(/3/,'6')
          @para.gsub!(/2/,'5')
          @para.gsub!(/1/,'4')
          @para.gsub!(/:?C/,'3')
          @para.gsub!(/:?B/,'2')
          @para.gsub!(/:?A/,'1')
          @para
        else @para
        end
      else @para
      end
    end
  end
  class Struct
    def initialize(o)
      @o=o
    end
    def structure
      def txt
        @o[:txt]
      end
      def node
        @o[:node]
      end
      def ocn
        @o[:ocn]
      end
      def lv
        @o[:lv]
      end
      def type
        @o[:type]
      end
      self
    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=ocnm=ocnu=ocnk=0 # h heading, o other, t table, g group, i image
      number_small,letter_small=0,0
      letter=%w( a b c d e f g h i j k l m n o p q r s t u v w x y z )
      node_count_flag=false
      headings='' #where headings omitted an alternative form of ocn heading numbering is required for html and other linking...
      #headings=if @md.ocn.inspect =~/skip=headings/; '^(?:[A-C]|[1-9])~\S* |'
      #else ''
      #end
      regex_exclude_ocn_and_node = /#{headings}^%{1,4}\s|^@\S+?:\s|^0~|^4~endnotes|^<\/center>|<:ee>|<:e[:_]>|^\^~ |<:e[:_]\d+?>|^<:p[bn]>|^<:\#|<:- |<[:!]!4|<table|<\/table>|<td|<\/td>|<th|<\/th>|<tr>|<\/tr>|<hr width|<:4-endnotes>|\[endnotes\]|<:zz>|<:isbn-|<:journal-|<:conference-|<ENDNOTES?>/i #ocn here #&nbsp; added with Tune.code #¡
      regex_exclude_ocn = /^(?:alt|code|group|poem|table)\{|^\}(?:alt|code|group|poem|table)|^\}table$/ #ocn here #&nbsp; added with Tune.code #¡
      data.each do |para|
        o={}
        if para =~/\w|\S|<|\(/
          if para !~ regex_exclude_ocn_and_node
            if node_count_flag or para=~/^1~/
              node_count_flag=true
            end
            node+=1 if node_count_flag
            if para !~ regex_exclude_ocn # regex_exclude_large previously excluded
              unless para=~/<:#>|~#|-#/ # |^\s*\*\s*\*\s*\*\s*$ <-consider leaving un-numbered
                ocn+=1
                if para=~/^[1-8]~(?:\s+|\S)/ or para =~@md.lv1 or para =~@md.lv2 or para =~@md.lv3 or para =~@md.lv4 or para =~@md.lv5 or para =~@md.lv6
                  ocnh+=1
                  if    para=~/^1~(?:\s+|\S)/ or para =~@md.lv1; ocnh1+=1
                    ocn_dv,ocn_sp="1:#{ocnh1}","h#{ocnh}"
                  elsif para=~/^2~(?:\s+|\S)/ or para =~@md.lv2; ocnh2+=1
                    ocn_dv,ocn_sp="2:#{ocnh2}","h#{ocnh}"
                  elsif para=~/^3~(?:\s+|\S)/ or para =~@md.lv3; ocnh3+=1
                    ocn_dv,ocn_sp="3:#{ocnh3}","h#{ocnh}"
                  elsif para=~/^4~(?:\s+|\S)/ or para =~@md.lv4; ocnh4+=1
                    ocn_dv,ocn_sp="4:#{ocnh4}","h#{ocnh}"
                  elsif para=~/^5~(?:\s+|\S)/ or para =~@md.lv5; ocnh5+=1
                    ocn_dv,ocn_sp="5:#{ocnh5}","h#{ocnh}"
                  elsif para=~/^6~(?:\s+|\S)/ or para =~@md.lv6; ocnh6+=1
                    ocn_dv,ocn_sp="6:#{ocnh6}","h#{ocnh}"
                  end
                else
                  ocno+=1
                  if para=~/<!TZ!>/;                             ocnt+=1 #tables
                    ocn_dv,ocn_sp="o#{ocno}","t#{ocnt}"
                  elsif para=~/^<:code>/;                        ocnc+=1
                    ocn_dv,ocn_sp="o#{ocno}","c#{ocnc}"
                  elsif para=~/^<:(?:group|alt|verse)>/;         ocng+=1
                    ocn_dv,ocn_sp="o#{ocno}","g#{ocng}"
                  elsif para=~/\{\S+?\.(?:png|jpg|gif)\s+/m;         ocni+=1
                    ocn_dv,ocn_sp="o#{ocno}","i#{ocni}"
                  else                                           ocnp+=1
                    ocn_dv,ocn_sp="o#{ocno}","p#{ocnp}"
                  end
                end
                o[:txt],o[:node],o[:ocn],o[:lv],o[:type]=para,node,ocn,ocn_dv,ocn_sp
              else                                               ocnu+=1
                #if para=~/-#/                   #if implemented would remove need to keep <-#>
                #                                                 ocnk+=1
                #  ocn_dv,ocn_sp="k#{ocnk}","u#{ocnu}"
                #else
                #  ocn_dv,ocn_sp="u#{ocnu}","u#{ocnu}"
                #end
                #para.gsub!(/<~#>|<-#>/,'') if para              #get rid of need
                para.gsub!(/<~#>/,'') if para
                ocn_dv,ocn_sp="u#{ocnu}","u#{ocnu}"
                o[:txt],o[:node],o[:ocn],o[:lv],o[:type]=para,node,0,ocn_dv,ocn_sp
              end
            else o[:txt],o[:node],o[:ocn],o[:lv],o[:type]=para,node,nil,nil,nil
            end
          else
            para=if para !~/^%{1,4}\s/
              o[:txt],o[:node],o[:ocn],o[:lv],o[:type]=para,node,nil,nil,nil
            else ''
            end
          end
        end
        para.gsub!(/\n\n/,"\n") if para =~/<:(?:code|verse|alt|group)>/ #newlines taken out
        para.gsub!(/(<:(?:code-end)>)/,"\n\\1") if para =~/<:(?:code-end)>/ #newlines added check
        if para =~/<!Th?¡/; para.gsub!(/(<!Th?¡.+?!)>/,"\\1~#{o[:ocn]};#{o[:lv]};#{o[:type]}>")
        end
        @o_array << Struct.new(o).structure if o
      end
      @o_array
    end
  end
  class Code < SiSU_document_structure_code::Code
  end
  class Tables < SiSU_document_structure_tables::Tables
  end
end
__END__