=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: texinfo 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
=end
module SiSU_TexInfo
  require "#{SiSU_lib}/html"
  require "#{SiSU_lib}/param"
  include SiSU_Param
  include SiSU_Viz
  #include Stamp ... needed removed arbitrarily 2005w05/1 (warnings about undefined flags)
  require "#{SiSU_lib}/texinfo_format"
  include TexInfoFormat
  @tex_file=[]
  @@tex_backslash="\\\\"
  @@tabular="{tabular}"
  @@table_pagebreak_counter,@@tex_endnote_call_counter,@@tex_table_flag,@@tex_counter,@@tex_column,@@tex_columns,@@counting=0,0,0,0,0,0,0
  @@column_instruct,@@tex_line_mode,@@tex_word_mode,@@start_table,@@line_mode='','','','',''
  @@n,@@copyright,@@tableheader=nil,nil,nil
  @@tex_col_w=[]
  @@tex_pattern_margin_number="\\\\marginpar.+?\s+"
  class Source #Songsheet
    include SiSU_Param
    include SiSU_Viz
    include SiSU_TexInfo
    def initialize(opt)
      @opt=opt
      @env=SiSU_Env::Info_env.new(@opt.fns)
      @st={ 'tex'=>{} }
      @tex=TexInfoFormat::Texinfo.new
      @vz=SiSU_Env::Get_init.instance.skin
    end
    def directories
      begin
        case @opt.fns
        when /\.[_-]?sst$/
          Dir.mkdir(@env.path.output) unless FileTest.directory?("#{@env.path.output}")
          Dir.mkdir(@env.path.texi) unless FileTest.directory?(@env.path.tex)
          @@filename_texinfo=File.new(%{#{@env.path.texi}/#@opt.fnb.texinfo},'w+')
        end
      rescue; STDERR.puts SiSU_Screen::Ansi.new(@opt.cmd,$!,$@).rescue
      ensure
      end
    end
    def read
      songsheet
    end
    def songsheet
      begin
        tell=SiSU_Screen::Ansi.new(@opt.cmd,'TexInfo')
        tell.green_title_hi unless @opt.cmd =~/q/
        data=IO.readlines(@opt.fns,'')
        @md=SiSU_Param::Parameters.new(@opt).get
        puts "\t#{@@cX.grey}TexInfo#{@@cX.off}"
        #@@copyright="\n #{@@tex_backslash*2}[3]\\ \\linebreak \\copyright \\ #{@md.copyright_tex}" if @md.copyright_tex #appears to be redundant ! remove 2004w19
        if @md.markup.to_s !~ /url_png/
          my_make=SiSU_Env::Create_file.new(@opt.cmd,@opt.fns)
          directories
          @marshalfile=my_make.marshal_meta
          if FileTest.file?(@marshalfile)==true
            File.open(@marshalfile) { |f| @@tuned_file=Marshal.load(f)}
            tell.meta_verse_skipped unless @opt.cmd =~/q/
          else
            tex_array=IO.readlines(@opt.fns,'')
            SiSU_Metaverse.songsheet(tex_array)
          end
          tex_array=@@tuned_file
          Texinfo_make.new(tex_array,@md).songsheet
          tex_array=''
        end
        #@@filename_texinfo.close if @@filename_texinfo
        @@filename_texinfo=nil
      rescue; STDERR.puts SiSU_Screen::Ansi.new(@opt.cmd,$!,$@).rescue
      ensure
        @@filename_texinfo.close if @@filename_texinfo
      end
    end
  end
  class Texinfo_make
    include SiSU_Param
    include TexInfoFormat
    @@tex_1='(?:.+?)+~' #?? debug
    @@tabular="{tabular}"
    @@tex_pattern_margin_number="\\\\marginpar.+?\s+"
    @@dp=nil
    def initialize(data,md)
      @data,@md=data,md #fns
      @env=SiSU_Env::Info_env.new(@md.fns)
      @st={ 'tex'=>{} }
      #@tex=TexInfoFormat::Texinfo.new
      @vz=SiSU_Env::Get_init.instance.skin
      @dp=@@dp ||=SiSU_Env::Info_env.new.digest.pattern
    end
    def songsheet
      begin
        @data=pre
        @data=endnote
        @data=markup
        @data=tail
        output
        makeinfo
      rescue; STDERR.puts SiSU_Screen::Ansi.new(@md.cmd,$!,$@).rescue
      ensure
      end
    end
    def pre
      @tex_file=[]
      data=@data
      data.each do |para|
        para.gsub!(/&/,'<=and>')
        # DEBUG 2003w16 this is a kludge, because i could not get parameters
        # from param, Sort out ... revert to more elegant solution
        if para =~ /<!Th?¡\s+c/
          @@flag['tables']='y' # KLUDGE get from param
        end
        para.gsub!(/<:p[bn]>/,'')
        do_mono=TexInfoFormat::Texinfo.new(para,@md)
        @tex_file << do_mono.spec_char
      end
      data=@tex_file.delete_if {|x| x =~ /^0(?:\\)+~/m}
      data=@tex_file # ...
    end
    def endnote
      data=@data
      @tex_file=[]
      data.each do |para|
        # BUG bug -> have problems with endnotes in headers
        if para =~ /\\~\\\{\d+\s+/ #if para =~ /<!e\s+/ # watch
          para.gsub!(/\s*\\~\\\{(\d+)\s+(.+?)<#@dp>\\\}\\~/m,' @footnote{ \2} ')
        end
        @tex_file << para
      end
      @tex_file
    end
    def poem
      data=@data
      @tex_file=[]
      @@counting=0
      data.each do |para|
        if para =~ /<:code>/
          @@flag['code']=1
          @@counting=1
        end
        if para =~ /<:verse>/
          @@flag['poem']=1
        end
        if @@flag['code']==1
          if @@flag['code']==1 and para =~ /<:code[-_](?:end|close)>/ #watch change not tested 200501
            @@flag['code']=0
          end
          if @@flag['code']==1 and para =~ /\S/
            sub_array=para.dup
            @@line_mode=sub_array.scan(/.+/)
            Tune.code_lines(@@line_mode)
            para=@@line_mode.join
          end
        elsif @@flag['poem']==1
          if @@flag['poem']==1 and para =~ /<:verse[-_](?:end|close)>/ #watch change not tested 200501
            @@flag['poem']=0
          end
          if @@flag['poem']==1 and para =~ /\S/
            sub_array=para.dup
            @@line_mode=sub_array.scan(/.+/)
            Tune.code_lines(@@line_mode)
            para=@@line_mode.join
          end
        end
        @tex_file << para
      end
    end
    def code_lines
      data=@data
      data.each do |line|
        if line =~ /\S/ and line !~ /<:(code|verse).+/
          if @@flag['code']==1
            line.gsub!(/^\s*(.+)/m, "\\noindent \\marginpar\[left-text\]{\\begin{tiny}#{@@counting}\\end{tiny}}\\1\\")
            @@counting+=1 if @@flag['code']==1
          else line.gsub!(/(.+)/m,'\noindent\1\')
          end
        end
      end
    end
    def tables
      data=@data
      @tex_file=[]
      @@tableheader=0
      data.each do |para|
        if para =~ /¡|<!T/i
          do_mono=TexInfoFormat::Texinfo.new(para,@md)
          para=do_mono.longtable # using longtable latex package
        end
        @tex_file << para
      end
    end
    def markup
      data=@data
      @tex_file=[]
      md={}
      @tex_file << TexInfoFormat::Texinfo.new('',@md).head
      mono=TexInfoFormat::Texinfo.new(@md.title,@md)
      @tex_file << mono.topnode
      texinfo_menu=[]
      n_menu,n_submenu=0,0
      @submenu,@subsubmenu={},{}
      data.each do |para|
        if para =~ /^[1-3]\\+~\S*(.+?)\s*$/
          toc=TexInfoFormat::Texinfo.new($1,@md)
          texinfo_menu << toc.menu
        end
        if para =~ /^[4-6]\\+~\S+\s*(.+?)\s*$/
          toc=TexInfoFormat::Texinfo.new($1,@md)
          texinfo_menu << toc.menu
          case para
          when /^[4]\\+~\S+\s+(.+?)\s*$/
            n_menu+=1
            @submenu[n_menu]=[]
          when /^[5]\\+~\S+\s+(.+?)\s*$/
            n_submenu+=1
            @subsubmenu[n_menu]=[]
            @submenu[n_menu] << toc.menu
          when /^[6]\\+~\S+\s+(.+?)\s*$/
            @subsubmenu[n_submenu] << toc.menu
          end
        end
      end
      texinfo_menu.compact!
      texinfo_menu << "* Dublin Core::"
      @tex_file << texinfo_menu
      @tex_file << "* Index::\n" +
        "@end menu\n\n" +
        "@c {{{ 5\n\n"
      n_menu,n_submenu=0,0
      @@do_submenu,@@do_subsubmenu=1,1
      data.each do |para|
        mono=TexInfoFormat::Texinfo.new(para,@md)
        case para
        when /^1\\+/; mono.level1
        when /^2\\+/; mono.level2
        when /^3\\+/; mono.level3
        when /^4\\+~/
          mono.level4
          n_menu+=1
          @@do_submenu,@@do_subsubmenu=1,1
        when /^5\\+/
          n_submenu+=1
          @@do_subsubmenu=1
          if @@do_submenu==1
            menu=TexInfoFormat::Texinfo.new(@submenu[n_menu],@md)
            para="#{menu.submenu}#{mono.level5}"
            @@do_submenu=0
          else mono.level5
          end
        when /^6\\+/
          if @@do_submenu==1
            menu=TexInfoFormat::Texinfo.new(@subsubmenu[n_menu],@md)
            para="#{menu.subsubmenu}#{mono.level6}"
            @@do_subsubmenu=0
          else
            mono.level6
          end
        #  when /^<!i1!>/
        #    mono.indent1
        #  when /^<!i2!>/
        #    mono.indent2
        #  when /<!:\s+/
        #    mono.graphics
        #  when /^\s*<!image\s+/
        #    mono.image
        #  when /\}image/
        #    mono.png
        #  when /\}http/
        #    mono.http
        else
          if para !~/\S/
            para=nil
          else
            para.gsub!(/<\\~(\d+);\w\d+;\w\d+><#@dp:#@dp>/,'~[\1]')
            #para.gsub!(/[1-3]\\\\\{\\\\\{\\\\\{\s+/, '')
            #para.gsub!(/[1-3]\\\\\{\s+/, '')
            para=para
          end
          #para.gsub!(/^\s+$/mi, "")
        end
#%case with endnotes
        para.gsub!(/\s*[0-8]\\+(\S+)?\s+/,' ') if para
        @tex_file << para if para
      end
      data=@tex_file
    end
    def numbering
      data=@data
      data=Texinfo_make.new(data,@md).number_titles
      #TOGGLE to SWITCH PARAGRAPH NUMBERING (ON & OFF)
      data=Texinfo_make.new(data,@md).number_paras \
        if @md.fns !~ /\.e[pdr]00/ and @md.markup !~ /not_to/i
    end
    def number_titles
      data=@data
      @tex_file=[]
      input=%{#{@md.markup}}[/(num_top\s*=\s*(\d?))?/m,2] # else default usually 4  # this was a bit of a trick required to pass nil to input if nothing matched... #puts input
      #input=/(num_top\s*=\s*(\d?))?/m.match(@md[:markup]) [2] # else default usually 4  # this was a bit of a trick required to pass nil to input if nothing matched... #puts input
      num_top=input.to_i
      t_no1=0;  t_no2=0;  t_no3=0;  t_no4=0;
      no1=num_top; no2=(num_top + 1); no3=(num_top + 2);  no4=(num_top + 3);
      data.each do |para|
        if @md.markup =~ /num_top/i and para !~ /0\\+/
          if para =~ /^[1-6]\\+(?:~\S+)?\s*<!h-.+?-!>/ and para !~ /<:\d-endnotes>/
            header=para[/<!h-(.+?)-!>/m, 1].gsub!(/-/m,'.')
            para.gsub!(/^(?:[1-6]\\+(?:~\S+)|<:([12356]|4-.+?-)>)\s*<!h-.+?-!>/,
              "\\1 #{header} ")
          end
        elsif para =~ /<!h!>|<!h\d!>|<!h.+?!>|<!!h.+?!>/
          if para =~ /<!h-.+?-!>/
            para.gsub!(/<!h-(.+?)-!>/,'\1 ')
          end
        end
        @tex_file << para
      end
      data=@tex_file
    end
    def number_paras
      data=@data
      @tex_file=[]
      paranumber=0
      data.each do |para|
        if para =~/<\\~(\d+);\w\d+;\w\d+><#@dp:#@dp>/ and para !~ /<EOF>/
          parablock,paranum=/(.+?)<\\~(\d+);\w\d+;\w\d+><#@dp:#@dp>/im.match(para)[1,2]
          do_duo=TexInfoFormat::DuoTex.new(parablock,paranum) ###is BUG
          para=do_duo.paraNum if parablock
        end
        @tex_file << para
      end
      data=@tex_file
    end
    def tail
      data=@data
      tex=TexInfoFormat::Texinfo.new('',@md)
      data << tex.dublincore
      data << tex.tail
    end
    def output
      data=@data
      data.compact!
      data.each {|para| (@@filename_texinfo.puts para,"\n") if para}
      @@filename_texinfo.close
    end
    def makeinfo
      if @md.fns =~/\.[_-]?sst$/
        m=/(.+?)\.[_-]?sst$/.match(@md.fns)
        fnb,sfx=m[1],m[2]
    	  pwd=Dir.pwd
        case sfx
        when /[_-]?sst$/
          @env=SiSU_Env::Info_env.new(@md.fns,@md.cmd)
          Dir.chdir(@env.path.texi)
          texinfo=SiSU_Env::System_call.new("#{fnb}.texinfo")
          texinfo.makeinfo
        end
        Dir.chdir(pwd)
      end
    end
  end
end
__END__