=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_code
  class Instantiate < SiSU_Param::Parameters::Instructions
    @@flag={} #Beware!!
    def initialize
      @@flag['table_to']=false
      @@counter=@@column=@@columns=0
      @@line_mode=''
    end
  end
  class Code
    @@flag={} #Beware!!
    def initialize(md,data)
      @md,@data=md,data
      Instantiate.new
    end
    def code
      data=@data
      tuned_file=[]
      @tuned_group=[]
      @@counter=0
      @verse_count=0
      data.each do |para|
        para.gsub!(/(<:(?:code|verse|alt|group)>)\s/,'\1') #double check
        para.gsub!(/(?:\n\s*\n)+/m,"\n")
        if para =~/^code\{/
          @@flag['code']=true
          @@counter=1
          para.gsub!(/^code\{.*/,'<:code>')
        elsif para =~/^(?:poem)\{/
          @@flag['poem']=true
          para.gsub!(/^(poem)\{.*/,'<:verse>')
        elsif para =~/^(?:alt|group)\{/ #group not tested, stub 2005
          @@flag['group']=true
          para.gsub!(/^(alt|group)\{.*/,'<:\1>')
        end
        if @@flag['code']
          if @@flag['code'] and para =~/^\}code/
            para.gsub!(/^\}code.*/,'<:code-end>')
            @@flag['code']=false
          end
          if @@flag['code'] #or para =~/<:code-end>/ #and para =~/\S/
            sub_array=para.dup
            @line_mode=sub_array.scan(/.+/)
            SiSU_document_structure_code::Code.new(@md,@line_mode).code_lines('code')
            para=@line_mode.join
          end
        elsif @@flag['poem'] or @@flag['group']
          if @@flag['poem'] and para =~/^\}(?:poem)/
            para.gsub!(/^\}(poem).*/,"\n<:verse-end>")
            @@flag['poem']=false
          elsif @@flag['group'] and para =~/^\}(?:alt|group)/
            para.gsub!(/^\}(alt|group).*/,'<:\1-end>')
            @@flag['group']=false
          end
          if @@flag['poem'] or @@flag['group'] and para =~/\S/ \
          and para !~/<:(verse|code|alt|group)(-end)?>/
            sub_array=para.dup
            @line_mode=sub_array.scan(/.+/)
            type=if @@flag['poem']; 'poem'
            else 'group'
            end
            SiSU_document_structure_code::Code.new(@md,@line_mode).code_lines(type)
            div=if @@flag['poem'] and @verse_count > 0
              "\n" + '<:verse-end>' + "\n\n" + '<:verse>'
            else ''
            end
            @verse_count+=1 if @@flag['poem']
            para = div + @line_mode.join
          else para
          end
        end
        if @@flag['code'] or @@flag['poem'] or  @@flag['group']
          @tuned_group << para if para =~/\S+/
        elsif para =~/<:(?:code|alt|group|verse)-end>/
          @verse_count=0
          @tuned_group << para
          if para =~/<:group-end>/
            tuned_file << @tuned_group.join("\n")
          else
            tuned_file << @tuned_group.join
          end
          @tuned_group=[]
        else tuned_file << para
        end
      end
      tuned_file
    end
    def code_lines(type='')
      data=@data
      data.each do |line|
        if line =~/\S/ and line !~/^(?:alt|code|group|poem)\{|^\}(?:alt|code|group|poem)|<:(?:code|verse|alt|group).+/
          line.gsub!(/\s\s/,'&nbsp;&nbsp;')
          line.gsub!(/^/,'<:codeline>') if type=='code' # try sort for texpdf special case
          line.gsub!(/$/,'<:br>') #unless type=='code'
          if @@flag['code']; @@counter+=1
          else
          end
        end
      end
    end
  end
end
__END__