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=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_tables
  class Instantiate < SiSU_Param::Parameters::Instructions
    @@flag={}
    def initialize
      @@flag['table_to']=false
      @@counter=@@column=@@columns=0
      @@line_mode=''
    end
  end
  class Tables
    @@flag={}
    def initialize(md,data)
      @md,@data=md,data
      Instantiate.new
    end
    def table_visual(para)
      count=0
      @row=[]
      table=[]
      @rows=para.split(/;;/)
      @rows.compact! #(c\d+?;.+?)
      @rows.each do |row|
        count +=1
        @row[count]=row.split(/\|/)
      end
      @row.compact!
      widths=if @row[0].to_s =~/^\{(?:t|table)(?:~h)?\s+\d+;/
        col_width=@row[0].to_s.scan(/\d+/)
        rem=(100 - col_width[0].to_i)
        col_w=rem/(@row[1].length - 1)
        "#{col_width[0].to_s};" + ("#{col_w};" * (@row[1].length-1))
      else 
        col_w=100/@row[1].length
        "#{col_w};" * @row[1].length
      end
      @row.delete_if {|r| r[0] =~/\{(?:table|t)(?:~h)?(?:\s+c\d+;)?[\d; ]*\}/}
      w=widths.split(/;/)
      tuned_file=[]
      tuned_file << if para =~/\{(?:t|table)~h(?:\sc\d+;)?[\d; ]*\}/
        "<!Th¡ c#{@row[2].length}; #{widths}!>"
      elsif para =~/\{(?:t|table)(?:\sc\d+;)?[\d; ]*\}/
        "<!T¡ c#{@row[2].length}; #{widths}!>"
      end
      @row.each do |l|
        l << '' if l.length == (@row[1].length - 1)
        table=[]
        if l.length == @row[1].length
          table << '<!'                                                                  #'<tr>'
          n= -1
          l.each do |c|
            n +=1                                                                      #'<td>' + c + '</td>'
            table << if c =~/\A(?:\n)?\s*\Z/
              "¡¡#{w[n]}¡" + ' '
            else
              "¡¡#{w[n]}¡" + c.strip 
            end
          end
          table << '!>'                                                                  #'</tr>'
          tuned_file << table.join
        end
      end
      tuned_file << '<!TZ!>'                                                            #'</table>'
      tuned_file=tuned_file.compact.join("\n")
    end
    def tables
      data=@data
      count=0
      @row,@tuned_file,@tuned_table=[],[],[]
      data.each do |para|
        para.gsub!(/\n\s+\n/,"\n")
        para.gsub!(/\s+\n/,"\n")
        para.gsub!(/<:hi>/,'<span style="background-color: rgb(255,240,196)">') # bright yellow rgb(255,255,0) pale yellow rgb(255,255,200)
        para.gsub!(/<:\/hi>/,%{</span>})
        table=[]
        if para =~/^\{(?:t|table)(?:~h)?(?:\sc\d+;)?[\d; ]*\}/
          @tuned_file << table_visual(para)
          @tuned_file=@tuned_file.flatten
        elsif @@flag['table_to'] or para[/table\{(?:~h)?/]
          if para[/table\{(?:~h)?\s+c(\d+;.+)/]
            instructions=$1
            @@column=instructions.split(/;\s*/)
            @@columns=@@column[0]
            para.gsub!(/table\{~h\s+(c\d+?;.+?)$/,'<!Th¡ \1!>')
            para.gsub!(/table\{\s+(c\d+?;.+?)$/,'<!T¡ \1!>')
            @@flag['table_to']=true
          end
          if @@flag['table_to'] and para =~/\}table/
            para.gsub!(/^\}table\s*$/,"<!TZ!>\n")
            para.gsub!(/\n/,' ') #newlines taken out
            para.strip!
            @tuned_table << para
            @tuned_table.delete('')
            @tuned_file << @tuned_table.compact.join("\n") #@tuned_table.compact.join =~/\S+/  #would be preferable 
            para=''
            @tuned_table=[]
            @@flag['table_to']=false
          end
          if @@flag['table_to'] and para =~/\S/
            @@counter=1
            sub_array=para.dup
            @@line_mode=sub_array.scan(/.+/)
            Tables.new(@md,@@line_mode).tr_td
            para=@@line_mode.join
            para.gsub!(/(.*\S+.*)\Z/m,'<!\1!>') unless para =~/<!Th?¡/
          end
          para.gsub!(/\n/,' ')
          para.strip!
          @tuned_table << para
        else
          para.gsub!(/\n/,' ') unless para =~/<:(?:code|verse|alt|group)>/
          para.strip!
          @tuned_file << para
        end
        @tuned_file
      end
      @tuned_file
    end
    def tr_td
      data=@data
      data.each do |line|
        if @@counter <= @@columns.to_i and line !~/(\}T\s*$|<:table[-_](close|end)>|<!TZ!>)/
          line.gsub!(/(.+)/,"¡¡#{@@column[@@counter]}¡\\1") unless line =~/<!Th?¡/
          @@counter+=1
        end
      end
      data
    end
  end
end
__END__