[BACK]Return to lonprintout.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / interface
File:  [LON-CAPA] / loncom / interface / lonprintout.pm
Revision 1.108: download - view: text, annotated - select for diffs
Wed Jan 29 15:57:44 2003 UTC (21 years, 3 months ago) by sakharuk
Branches: MAIN
CVS tags: HEAD
Bugs 1166, 1184, 749, and 1101 are fixed.
1. Cleanup of the information for page header is done (last name, first name, course title, and sequence title). Some special characters are removed (_ ^), some are escaped (&). Currently it works well but I  guess we can meet some additional symbols in the future (for example in sequences titles). I'll check this possibility from time to time.
2. All info for page header is unescaped now which allows to print students names with dots, empty spaces , ...
3. Submit button is added to some menu. Additional work will be done after conversation wuth Geremy.

# The LearningOnline Network
# Printout
#
# $Id: lonprintout.pm,v 1.108 2003/01/29 15:57:44 sakharuk Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA 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.
#
# LON-CAPA 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 LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
# (Internal Server Error Handler
#
# (Login Screen
# 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14,
# 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9 Gerd Kortemeyer)
#
# 3/1/1 Gerd Kortemeyer)
#
# 3/1 Gerd Kortemeyer
#
# 9/17 Alex Sakharuk
#
package Apache::lonprintout;

use strict;
use Apache::Constants qw(:common :http);
use Apache::lonxml;
use Apache::lonnet;
use Apache::loncommon;
use Apache::inputtags;
use Apache::grades;
use Apache::edit;
use Apache::File();
use Apache::lonnavmaps;
use POSIX qw(strftime);
use GDBM_File;


my %hash;
my $LaTeXwidth = 0;

sub headerform {
    my $r = shift;
    $r->print(<<ENDHEADER);
<html>
<head>
<title>LON-CAPA output for printing</title>
</head>
<body bgcolor="FFFFFF">
<form method="post" enctype="multipart/form-data" action="/adm/printout" name="printform">
ENDHEADER

    if ($ENV{'form.postdata'}=~m|^/res/|) {
	$r->print(<<ENDHEADER1);
<b>Path to current document: </b><tt>$ENV{'form.postdata'}</tt><p>
ENDHEADER1
    }
}


sub menu_for_output {
    my $r = shift;
    my ($title_for_single_resource,$title_for_sequence,$title_for_main_map) = &details_for_menu;
    my $assignment = $title_for_sequence;
    if ($title_for_single_resource ne '') {$title_for_single_resource = '"'.$title_for_single_resource.'"';}
    if ($title_for_sequence ne '') {$title_for_sequence = '"'.$title_for_sequence.'"';}
    if ($title_for_main_map ne '') {$title_for_main_map = '"'.$title_for_main_map.'"';}
    $ENV{'form.postdata'} =~ s|http://[^/]+||;
    my $subdir_to_print = $ENV{'form.postdata'};
    $subdir_to_print =~ m/\/([^\/]+)$/;
    $subdir_to_print =~ s/\Q$1\E//;
    $r->print(<<ENDMENUOUT1);
<h1>What do you want to print? Make a choice.</h1><br />
<input type="hidden" name="phase" value="two">
<input type="hidden" name="url" value="$ENV{'form.postdata'}">
<input type="hidden" name="assignment" value="$assignment">
<input type="radio" name="choice" value="Standard LaTeX output for current document" checked>  Current document <b>$title_for_single_resource</b>
(prints what you just saw on the screen)<br />
ENDMENUOUT1
    if ($ENV{'form.postdata'}=~/\/res\//) {
	$r->print(<<ENDMENUOUT2);
<input type="radio" name="choice" value="Standard LaTeX output for the primary sequence">  Problem(s) from <b>$title_for_sequence</b><br />
<input type="radio" name="choice" value="Standard LaTeX output for whole primary sequence">  Problem(s) plus page(s) or html/xml file(s) from <b>$title_for_sequence</b><br />
ENDMENUOUT2
    }
    if (($ENV{'request.role'}=~m/^cc\./ or $ENV{'request.role'}=~m/^in\./ or $ENV{'request.role'}=~m/^ta\./) and ($ENV{'form.postdata'}=~/\/res\//)) { 
	$r->print(<<ENDMENUOUT6);
<input type="radio" name="choice" value="Standard LaTeX output for the top level sequence">  All problems in this course (<b>warning:</b> this may be time consuming) <br />
<br />
<input type="radio" name="choice" value="All class print">  All problems from <b>$title_for_sequence</b> for selected students<br /><br />
ENDMENUOUT6
    }
      my $subdirtoprint = &Apache::lonnet::filelocation("",$ENV{'form.url'});
      $subdirtoprint =~ s/\/[^\/]+$//;
      if ((&Apache::lonnet::allowed('bre',$subdirtoprint) eq 'F') and ($ENV{'form.postdata'}=~/\.(problem|exam|quiz|assess|survey|form|library|page|xml|html|htm|xhtml|xhtm)/)) {
	  $r->print(<<ENDMENUOUT4);
  <input type="radio" name="choice" value="Subdirectory print">  Problems from current subdirectory <b>$subdir_to_print</b><br />
ENDMENUOUT4
      }
    $r->print(<<ENDMENUOUT5);
<br /><hr /><br />
<h1>And what page format do you prefer?</h1>
<table>
 <tr>
   <td>
     <input type="radio" name="layout" value="CBI"> Landscape <br />
     <input type="radio" name="layout" value="CAPA" checked>  Portrait <br />
   </td>
   <td>&nbsp;</td>
   <td rawspan="2">
     Number of columns: <select name="numberofcolumns">
                         <option> 1 </option>
                         <option selected> 2 </option>
                        </select> 
   </td>
   <td rawspan="2">
     Paper size (format [width x height]): <select name="papersize">
                                            <option selected> Letter [8 1/2x11 in] </option>
                                            <option> Legal [8 1/2x14 in] </option>
                                            <option> Ledger/Tabloid [11x17 in] </option>
                                            <option> Executive [7 1/2x10 in] </option>
                                            <option> A2 [420x594 mm] </option>
                                            <option> A3 [297x420 mm] </option>
                                            <option> A4 [210x297 mm] </option>
                                            <option> A5 [148x210 mm] </option>
                                            <option> A6 [105x148 mm] </option>
                                           </select> 
   </td>
 </tr>
</table>
</br> 
<input type="submit" value="Submit your choice">
ENDMENUOUT5
}


sub sequence_content_menu {
    my ($key_to,$r) = @_;
    my $primary_sequence;
    my $symbolic = &Apache::lonnet::symbread($ENV{'form.url'});
    my @sequence = split('___',$symbolic);
    if ($sequence[0]=~/^uploaded/) {$primary_sequence = '/'.$sequence[0];} 
      else {$primary_sequence = '/res/'.$sequence[0];} 
    my @master_seq = &coming_from_hash($primary_sequence,$sequence[0]);
    my @titles_master_seq = &titles_coming_from_hash($primary_sequence,$sequence[0]);
    foreach my $entity (@titles_master_seq) {$entity=~/^(.*)&&/; $entity=$1}
    my @master_seq_view = @master_seq;
    if ($ENV{'user.adv'}) {
      for (my $i=0;$i<=$#master_seq_view;$i++) {
	 $master_seq_view[$i]=~/___\d+___(.+)$/;
	 $master_seq_view[$i]='/'.$1;
      }
    } else {
      for (my $i=0;$i<=$#master_seq_view;$i++) {
         $master_seq_view[$i]=' ';
      }
    }
    $r->print(<<ENDMENUOUT1);
<input type="hidden" name="url" value="$ENV{'form.url'}">
<input type="hidden" name="choice" value="$ENV{'form.choice'}">
<input type="hidden" name="layout" value="$ENV{'form.layout'}">
<input type="hidden" name="papersize" value="$ENV{'form.papersize'}">
<input type="hidden" name="assignment" value="$ENV{'form.assignment'}">
<input type="hidden" name="numberofcolumns" value="$ENV{'form.numberofcolumns'}">
<h1>Mark item(s) which you want to print</h1>
<script>
    function checkall() {
	for (i=0; i<document.forms.printform.elements.length; i++) {
            if 
          (document.forms.printform.elements[i].name.indexOf('whatfile')==0) {
	      document.forms.printform.elements[i].checked=true;
            }
        }
    }
    function uncheckall() {
	for (i=0; i<document.forms.printform.elements.length; i++) {
            if 
          (document.forms.printform.elements[i].name.indexOf('whatfile')==0) {
	      document.forms.printform.elements[i].checked=false;
            }
        }
    }
</script>
<input type=button onClick="checkall()" value="Check All">&nbsp;
<input type=button onClick="uncheckall()" value="Uncheck">&nbsp;
<input type="submit" value="Submit">
<p>
ENDMENUOUT1
    my $inc=0; 
    for (my $i=0;$i<=$#master_seq_view;$i++) {
      if ($key_to==1 && $master_seq[$i]=~/\.(problem|exam|quiz|assess|survey|form|library)$/) {
	$r->print('<br /><input type=checkbox name="whatfile'.$inc.'" value="'.$master_seq[$i].'"> '."\n".'<b>'.
                  $titles_master_seq[$i].'</b>&nbsp;&nbsp;&nbsp;<small>'.$master_seq_view[$i].'</small>');
        $inc++;
    } elsif ($key_to==0 && $master_seq[$i]=~/\.(problem|exam|quiz|assess|survey|form|library|xml|htm|html|page)$/) {
	$r->print('<br /><input type=checkbox name="whatfile'.$inc.'" value="'.$master_seq[$i].'"> '."\n".'<b>'.
                  $titles_master_seq[$i].'</b>&nbsp;&nbsp;&nbsp;<small>'.$master_seq_view[$i].'</small>');
        $inc++;
      }
    }
    $r->print(<<ENDMENUOUT2);
<br /><br />
<input type="hidden" name="numberoffiles" value="$inc">
<input type="hidden" name="phase" value="three">
<input type=button onClick="checkall()" value="Check All">&nbsp;
<input type=button onClick="uncheckall()" value="Uncheck">&nbsp;
<input type="submit" value="Submit">
ENDMENUOUT2

}


sub problem_choice_menu {
    my $r = shift;
    my $subdirtoprint = &Apache::lonnet::filelocation("",$ENV{'form.url'});
    $subdirtoprint =~ s/\/[^\/]+$//;
    my @list_of_files = ();
    my @content_directory = ();
    if ($subdirtoprint =~ m|/home/([^/]+)/public_html|) {
	#localmachine CSTR space
	my $user=$1;
	my $domain=$Apache::lonnet::perlvar{'lonDefDomain'};
	@content_directory = &Apache::lonnet::dirlist($subdirtoprint,
						      $domain, $user,'');
    } else {
	@content_directory = &Apache::lonnet::dirlist($subdirtoprint);
    }
    for (my $iy=0;$iy<=$#content_directory;$iy++) {
	my @tempo_array = split(/&/,$content_directory[$iy]);
	if ($tempo_array[0] =~ m/^[^\.]+\.(problem|exam|quiz|assess|survey|form|library)$/) {
	    push(@list_of_files,$tempo_array[0]);
	}
    }
    $subdirtoprint =~ s/\/$//;
    for (my $i=0;$i<=$#list_of_files;$i++) {
	$list_of_files[$i] = $subdirtoprint.'/'.$list_of_files[$i];
    }
    $r->print(<<ENDMENUOUT1);
<input type="hidden" name="url" value="$ENV{'form.url'}">
<input type="hidden" name="choice" value="$ENV{'form.choice'}">
<input type="hidden" name="layout" value="$ENV{'form.layout'}">
<input type="hidden" name="numberofcolumns" value="$ENV{'form.numberofcolumns'}">
<h1>Mark problems which you want to print</h1>
<script>
    function checkall() {
	for (i=0; i<document.forms.printform.elements.length; i++) {
            if 
          (document.forms.printform.elements[i].name.indexOf('whattoprint')==0) {
	      document.forms.printform.elements[i].checked=true;
            }
        }
    }


    function uncheckall() {
	for (i=0; i<document.forms.printform.elements.length; i++) {
            if 
          (document.forms.printform.elements[i].name.indexOf('whattoprint')==0) {
	      document.forms.printform.elements[i].checked=false;
            }
        }
    }
</script>
<input type=button onClick="checkall()" value="Check All">&nbsp;
<input type=button onClick="uncheckall()" value="Uncheck">&nbsp;
<input type="submit" value="Submit">
<p>
ENDMENUOUT1
    my $i=0;
    foreach my $file (sort @list_of_files) {
	$r->print('<br /><input type=checkbox name="whattoprint'.$i.'" value="'.$file.'"> '.
                  $file);
	$i++;
    }
    $r->print(<<ENDMENUOUT2);
<br /><br />
<input type="hidden" name="papersize" value="$ENV{'form.papersize'}">
<input type="hidden" name="numberofproblems" value="$i">
<input type="hidden" name="phase" value="three">
<input type=button onClick="checkall()" value="Check All">&nbsp;
<input type=button onClick="uncheckall()" value="Uncheck">&nbsp;
<input type="submit" value="Submit">
ENDMENUOUT2
}


sub additional_class_menu {
    my $r = shift;
    $r->print(<<ENDMENUOUT1);
<input type="hidden" name="url" value="$ENV{'form.url'}">
<input type="hidden" name="choice" value="$ENV{'form.choice'}">
<input type="hidden" name="layout" value="$ENV{'form.layout'}">
<input type="hidden" name="numberofcolumns" value="$ENV{'form.numberofcolumns'}">
<input type="hidden" name="assignment" value="$ENV{'form.assignment'}">
<h1>Select student(s) whose assignment you want to print</h1>
ENDMENUOUT1
    my %courselist=&Apache::lonnet::dump(
                   'classlist',
		   $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
		   $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
    my $now=time;
    $r->print(<<ENDDISHEADER);
<script>
    function checkall() {
	for (i=0; i<document.forms.printform.elements.length; i++) {
            if 
          (document.forms.printform.elements[i].name.indexOf('whomtoprint')==0) {
	      document.forms.printform.elements[i].checked=true;
            }
        }
    }

    function checksec() {
	for (i=0; i<document.forms.printform.elements.length; i++) {
            if 
          (document.forms.printform.elements[i].value.indexOf
           (document.forms.printform.chksec.value)==0) {
	      document.forms.printform.elements[i].checked=true;
            }
        }
    }

    function uncheckall() {
	for (i=0; i<document.forms.printform.elements.length; i++) {
            if 
          (document.forms.printform.elements[i].name.indexOf('whomtoprint')==0) {
	      document.forms.printform.elements[i].checked=false;
            }
        }
    }
</script>
<input type=button onClick="checkall()" value="Check All">&nbsp;
<input type=button onClick="checksec()" value="Type Section/Group then click">
<input type=text size=5 name=chksec>&nbsp;
<input type=button onClick="uncheckall()" value="Uncheck">
<p>
ENDDISHEADER
    my $i = 0;
    foreach (sort keys %courselist) {
        my ($end,$start)=split(/\:/,$courselist{$_});
        my $active=1;
        if (($end) && ($now>$end)) { $active=0; }
        if ($active) {
           my ($sname,$sdom)=split(/\:/,$_);
           my %reply=&Apache::lonnet::get('environment',
              ['firstname','middlename','lastname','generation'],
              $sdom,$sname);
           my $section=&Apache::lonnet::usection
	       ($sdom,$sname,$ENV{'request.course.id'});
           $r->print(
        '<br /><input type=checkbox name="whomtoprint'.$i.'" value="'.$section.':'.$_.'"> '.
		      $reply{'firstname'}.' '. 
                      $reply{'middlename'}.' '.
                      $reply{'lastname'}.' '.
                      $reply{'generation'}.
                      ' ('.$_.') '.$section);
	   $i++;
        } 
    }
    $r->print(<<ENDMENUOUT2);
<br />Number of blank pages to add: <select name="addedpages"><option selected>0</option>
                                                              <option>1</option>
                                                              <option>2</option>
                                                              <option>3</option>
                                    </select>
<br /> 
<input type="hidden" name="papersize" value="$ENV{'form.papersize'}">
<input type="hidden" name="numberofstudents" value="$i">
<input type="hidden" name="phase" value="three">
<input type="submit" value="Submit">
ENDMENUOUT2
}


sub additional_print_menu { 
    my $r = shift;
    my $what_to_print = '';
    for (my $i=0; $i<$ENV{'form.numberofstudents'};$i++) {
	$what_to_print .= '<input type="hidden" name="whomtoprint'.$i.'" value="'.$ENV{'form.whomtoprint'.$i}.'">';
    }
    for (my $i=0; $i<$ENV{'form.numberofproblems'};$i++) {
	$what_to_print .= '<input type="hidden" name="whattoprint'.$i.'" value="'.$ENV{'form.whattoprint'.$i}.'">';
    }
    for (my $i=0; $i<$ENV{'form.numberoffiles'};$i++) {
	$what_to_print .= '<input type="hidden" name="whatfile'.$i.'" value="'.$ENV{'form.whatfile'.$i}.'">';
    }
    $r->print(<<ENDMENUOUT);
    $what_to_print
<input type="hidden" name="url" value="$ENV{'form.url'}">
<input type="hidden" name="choice" value="$ENV{'form.choice'}">
<input type="hidden" name="layout" value="$ENV{'form.layout'}">
<input type="hidden" name="papersize" value="$ENV{'form.papersize'}">
<input type="hidden" name="numberofstudents" value="$ENV{'form.numberofstudents'}">
<input type="hidden" name="numberofproblems" value="$ENV{'form.numberofproblems'}">
<input type="hidden" name="numberoffiles" value="$ENV{'form.numberoffiles'}">
<input type="hidden" name="numberofcolumns" value="$ENV{'form.numberofcolumns'}">
<input type="hidden" name="assignment" value="$ENV{'form.assignment'}">
<input type="hidden" name="addedpages" value="$ENV{'form.addedpages'}">
Define one column layout parameters: <br />
<b>Width</b>: <input type="text" name="width" width="8" value="9cm"> <br />
<b>Height</b>: <input type="text" name="height" width="8" value="25.9cm"> <br />
<b>Left margin</b>: <input type="text" name="leftmargin" width="8" value="-0.57in"> <br />
<input type="hidden" name="phase" value="four">
<input type="submit" value="Submit">
</form>
</body>
</html>
ENDMENUOUT
}


sub output_data {
    my $r = shift;
    $r->print(<<ENDPART);
<html>
<head>
<title>LON-CAPA output for printing</title>
</head>
<body bgcolor="FFFFFF">
<hr>
ENDPART

    my $choice = $ENV{'form.choice'};
    my $layout = $ENV{'form.layout'};
    my $numberofcolumns = $ENV{'form.numberofcolumns'};  
    my $papersize = $ENV{'form.papersize'};          
    my $laystyle = 'book';
    my $assignment =  $ENV{'form.assignment'};
    if ($choice eq 'Subdirectory print') {
	if ($ENV{'form.layout'} eq '') {$layout = 'CAPA';}
	if ($ENV{'form.papersize'} eq '') {$papersize = 'Letter [8 1/2x11 in]';}
	if ($ENV{'form.numberofcolumns'} eq '') {$numberofcolumns = 2;}
    }
    if (($choice eq 'Standard LaTeX output for current document') &&
	($ENV{'form.url'}=~m|^/~|)) {
	if ($ENV{'form.layout'} eq '') {$layout = 'CAPA';}
	if ($ENV{'form.papersize'} eq '') {$papersize = 'Letter [8 1/2x11 in]';}
	if ($ENV{'form.numberofcolumns'} eq '') {$numberofcolumns = 2;}
    }
    my $result = '';
    my $number_of_columns = 1; #used only for pages to determine the width of the cell
    my $selectionmade = '';
    my ($textwidth,$textheight,$oddoffset,$evenoffset) = &page_format($papersize,$layout,$numberofcolumns);
    if ($numberofcolumns == 1) {
	$textwidth=$ENV{'form.width'};
	$textheight=$ENV{'form.height'};
    }
    my $LaTeXwidth; 
    if ($textwidth=~/(\d+\s*cm)/) {
	$LaTeXwidth = $1*10;
    } elsif ($textwidth=~/(\d+\s*mm)/) {
	$LaTeXwidth = $1;
    }
    if ($choice eq 'Standard LaTeX output for current document') {
      #-- single document - problem, page, html, xml  
      $selectionmade = 1;
      if ($ENV{'form.url'}=~/\.(problem|exam|quiz|assess|survey|form|library|page|xml|html|htm|xhtml|xhtm)$/) {
        my %moreenv;
        $moreenv{'form.grade_target'}='tex';
        if (&Apache::lonnet::allowed('bre',$ENV{'form.url'})) {
	  $ENV{'form.url'}=~s/http:\/\/[^\/]+//;
        }
        $moreenv{'request.filename'}=$ENV{'form.url'};
        $moreenv{'form.textwidth'}=$LaTeXwidth;
        &Apache::lonnet::appenv(%moreenv);
        my $texversion=&Apache::lonnet::ssi($ENV{'form.url'});
        &Apache::lonnet::delenv('form.grade_target','form.textwidth','form.counter');
        $result .= $texversion;
        if ($ENV{'form.url'}=~m/\.page\s*$/) {
	  ($result,$number_of_columns) = &page_cleanup($result);
        }
      } else {
	  $result='\documentclass[letterpaper]{article}\usepackage{calc}\begin{document}Printout of this type of document is currently not supported: ';
	  if ($ENV{'form.url'}=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) {
	      $result.=$1;
	  } else {
	      $result.=$ENV{'form.url'};
	  }
	  $result.=' \end{document}'
      }
    } elsif ($choice eq 'Standard LaTeX output for the primary sequence' or 
             $choice eq 'Standard LaTeX output for whole primary sequence') {
      #-- minimal sequence to which the current document belongs
        #-- where is the primary sequence containing file?
        my @master_seq = ();
	for (my $i=0; $i<$ENV{'form.numberoffiles'};$i++) {
	    if ($ENV{'form.whatfile'.$i}=~/\S/) {
		push @master_seq,$ENV{'form.whatfile'.$i};
	    }
	}
        #-- produce an output string
	my $flag_latex_header_remove = 'NO';
	my $flag_page_in_sequence = 'NO';
	for (my $i=0;$i<=$#master_seq;$i++) {
           my ($urlp,$symb) = split /&&/, $master_seq[$i];
	    if ($choice eq 'Standard LaTeX output for the primary sequence') {
              $selectionmade = 2;
	    } elsif ($choice eq 'Standard LaTeX output for whole primary sequence') {
              $selectionmade = 3;
	    }
	   my %moreenv;
	   $moreenv{'form.grade_target'}='tex';
	   $moreenv{'form.textwidth'}=$LaTeXwidth;
	   &Apache::lonnet::appenv(%moreenv);
	   #&Apache::lonnet::logthis("Trying to get $urlp with symb $symb");
	   my $texversion=&Apache::lonnet::ssi($urlp,('symb'=>$symb));
	   &Apache::lonnet::delenv('form.grade_target','form.textwidth');
	   if ($urlp =~ m/\.page/) {
	     ($texversion,my $number_of_columns_page) = &page_cleanup($texversion);
	     if ($number_of_columns_page > $number_of_columns) {$number_of_columns=$number_of_columns_page;} 
	     $texversion =~ s/\\end{document}\d*/\\end{document}/;
	     $flag_page_in_sequence = 'YES';
	   } 
	   if ($flag_latex_header_remove ne 'NO') {
	     $texversion = &latex_header_footer_remove($texversion);
	   } else {
	     $texversion =~ s/\\end{document}//;
	   }
	   $result .= $texversion;         
	   $flag_latex_header_remove = 'YES';   
	}
	&Apache::lonnet::delenv('form.counter');
	if ($flag_page_in_sequence eq 'YES') {$result =~ s/\\usepackage{calc}/\\usepackage{calc}\\usepackage{longtable}/;}	
	$result .= '\end{document}';
    }  elsif ($choice eq 'Standard LaTeX output for the top level sequence') {
        # where is the main sequence of the course?
	$selectionmade = 4;
	my $main_seq;
	if ($ENV{'request.course.uri'}=~/\/?uploaded\//) {
	    $main_seq = $ENV{'request.course.uri'};
	} else {
	    $main_seq = '/res/'.$ENV{'request.course.uri'};
	}
	my @file_seq = &coming_from_hash_whole($main_seq);
	my $flag_latex_header_remove = 'NO';
        #-- produce an output string
	for (my $i=0;$i<=$#file_seq;$i++) {
	   if (not $file_seq[$i]=~/^&&/) {
	     my ($urlp,$symb) = split /&&/, $file_seq[$i];
	     $urlp=~s/\/home\/httpd\/html//;	    
	     if ($urlp=~m/\.(problem|exam|quiz|assess|survey|form|library)/) {
		my %moreenv;
		$moreenv{'form.grade_target'}='tex';
		$moreenv{'form.textwidth'}=$LaTeXwidth;
		&Apache::lonnet::appenv(%moreenv);
		my $texversion=&Apache::lonnet::ssi($urlp,('symb'=>$symb));
		&Apache::lonnet::delenv('form.grade_target','form.textwidth');		    
		if ($flag_latex_header_remove ne 'NO') {
		    $texversion = &latex_header_footer_remove($texversion);
		} else {
		    $texversion =~ s/\\end{document}//;
		}
		$result .= $texversion;  
		$flag_latex_header_remove = 'YES';
	     }		
	   }
	}	    
	$result .= '\end{document}';
    } elsif ($choice eq 'All class print') { 
    #-- prints assignments for whole class or for selected students  
	$selectionmade = 5;
        my @students = ();
	for (my $i=0; $i<$ENV{'form.numberofstudents'};$i++) {
	    if ($ENV{'form.whomtoprint'.$i}=~/:/) {
		push @students,$ENV{'form.whomtoprint'.$i};
	    }
	}
	#where is the primary sequence containing current resource (the same for all students)?
	my $symbolic = &Apache::lonnet::symbread($ENV{'form.url'});
	my @sequence = split('___',$symbolic);
	my $primary_sequence = '/res/'.$sequence[0]; 	
	my @master_seq = &coming_from_hash($primary_sequence,$sequence[0]); 
        #loop over students
	my $flag_latex_header_remove = 'NO'; 
	my %moreenv;
	$moreenv{'form.textwidth'}=$LaTeXwidth;
	&Apache::lonnet::appenv(%moreenv);
	foreach my $person (@students) {
	    my $current_output = ''; 
	    my ($usersection,$username,$userdomain) = split /:/,$person;
	    my $fullname = &Apache::grades::get_fullname($username,$userdomain);
            #goes through all resources, checks if they are available for current student, and produces output   
	    foreach my $curresline (@master_seq)  {
		my ($curres,$symb) = split /&&/, $curresline;
                if ($curres=~ m/\.(problem|exam|quiz|assess|survey|form|library)/) {
		    my ($map,$id,$res_url) = split(/___/,$symb);
		    if (&Apache::lonnet::allowed('bre',$res_url)) {
			my $rendered = &Apache::loncommon::get_student_view($symb,$username,$userdomain,
                                                                        $ENV{'request.course.id'},'tex');
			if ($flag_latex_header_remove eq 'YES') {
			    $rendered = &latex_header_footer_remove($rendered);
			} else {
			    $rendered =~ s/\\end{document}//;
			}
			$current_output .= $rendered;
		    }
		    $flag_latex_header_remove = 'YES';
		}
	    }
	    if ($current_output=~/\\documentclass/) {
		my $courseidinfo = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
		$current_output =~ s/\\begin{document}/\\setlength{\\topmargin}{1cm}\\setlength{\\headheight}{1cm}\\setlength{\\headsep}{0.5cm}\\pagestyle{myheadings}\\markboth{}{{$courseidinfo  - $assignment}}\\begin{document}\\noindent\\textit{\\textbf{$fullname}}\\vskip 3 mm /;
	    } else {
		my $blanspages = '';
		for (my $j=0;$j<$ENV{'form.addedpages'};$j++) {$blanspages.='\clearpage\strut\clearpage';}
		$current_output = '\strut\\newline\\noindent\\makebox[\\textwidth/$number_of_columns][b]{\\hrulefill}\\newline\\noindent{\\tiny Printed from LON-CAPA\\copyright MSU{\\hfill} Licensed under GNU General Public License } \\vskip 3mm'.$blanspages.'\setcounter{page}{1}\noindent\parbox{\minipagewidth}{\noindent\textit{\textbf{'.$fullname.'}}\hskip 1.4in } \vskip 5 mm '.$current_output;
	    }
	    $result .= $current_output;
	    &Apache::lonnet::delenv('form.counter');
	}
	$result .= '\end{document}';
	&Apache::lonnet::delenv('form.textwidth');
    } elsif ($choice eq 'Subdirectory print') {      
    #prints selected problems from the subdirectory 
	$selectionmade = 6;
        my @list_of_files = ();
	for (my $i=0; $i<$ENV{'form.numberofproblems'};$i++) {
	    if ($ENV{'form.whattoprint'.$i}=~/^\//) {
		push @list_of_files,$ENV{'form.whattoprint'.$i};
	    }
	}	
	my $flag_latex_header_remove = 'NO';  
	for (my $i=0;$i<=$#list_of_files;$i++) {
	    my $urlp = $list_of_files[$i];
	    if ($urlp=~/\//) {
		my %moreenv;
		$moreenv{'form.grade_target'}='tex';
		$moreenv{'form.textwidth'}=$LaTeXwidth;
		&Apache::lonnet::appenv(%moreenv);
		if ($urlp =~ m|/home/([^/]+)/public_html|) {
		    $urlp =~ s|/home/([^/]*)/public_html|/~$1|;
		}
		my $texversion=&Apache::lonnet::ssi($urlp);
		&Apache::lonnet::delenv('form.grade_target','form.textwidth');
                #this chunck is responsible for printing the path to problem
		my $newurlp = '';
		my $HowMany = length($urlp)*2;
		if ($HowMany > $LaTeXwidth) {
		    my @temporrary = split '/',$urlp;
		    my $HowManyNew = 0;
		    for (my $ii=0;$ii<=$#temporrary;$ii++) {
			if ($temporrary[$ii] ne '') {
			    $HowManyNew += length($temporrary[$ii])*2;
			    if ($HowManyNew < $LaTeXwidth ) {
				$newurlp .=  '/'.$temporrary[$ii];
			    } else {
				$HowManyNew = 0;
				$newurlp .=  '|\vskip -1 mm \noindent \verb|';
				$ii--;
			    }
			}
		    }
		}
		$texversion =~ s/(\\begin{minipage}{\\textwidth})/$1 {\\small\\noindent\\verb|$newurlp\|\\vskip 0 mm}/;
		if ($flag_latex_header_remove ne 'NO') {
		    $texversion = &latex_header_footer_remove($texversion);
		} else {
		    $texversion =~ s/\\end{document}//;
		}
		$result .= $texversion;
	    }
	    $flag_latex_header_remove = 'YES';  
	}
	$result .= '\end{document}';      	
    }
#-------------------------------------------------------- corrections for the different page formats
    $result = &page_format_transformation($papersize,$layout,$numberofcolumns,$choice,$result,$assignment);
    if ($layout eq 'CBI') {
        $laystyle = 'album';
    }
    $result = &latex_corrections($number_of_columns,$result);
    #changes page's parameters for the one column output 
    if ($ENV{'form.numberofcolumns'} == 1) {
	$result =~ s/\\textwidth= 9cm/\\textwidth= $ENV{'form.width'}/;
	$result =~ s/\\textheight 25\.9cm/\\textheight $ENV{'form.height'}/;
	$result =~ s/\\evensidemargin = -0\.57in/\\evensidemargin= $ENV{'form.leftmargin'}/;
	$result =~ s/\\oddsidemargin = -0\.57in/\\oddsidemargin= $ENV{'form.leftmargin'}/;
    }
#-- writing .tex file in prtspool 
    my $temp_file;
    my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout_".time."_".rand(10000000).".tex";
    unless ($temp_file = Apache::File->new('>'.$filename)) {
	$r->log_error("Couldn't open $filename for output $!");
	return SERVER_ERROR; 
    } 
    print $temp_file $result;
$r->print(<<FINALEND);
<meta http-equiv="Refresh" content="0; url=/cgi-bin/printout.pl?$filename&$laystyle&$numberofcolumns&$selectionmade">
</body>
</html>
FINALEND
}


sub coming_from_hash_whole {

    my $mainsequence = shift;
    my @resourcelist = ();
    my $mapid = $hash{'map_pc_'.$mainsequence};
    my $mapstart = $hash{'map_start_'.$mainsequence};
    my $mapfinish = $hash{'map_finish_'.$mainsequence};
    my $current_resource = $mapstart;
    while ($current_resource ne $mapfinish) {
	if ($hash{'src_'.$current_resource}=~/\.sequence$/) {
	    push @resourcelist,&coming_from_hash_whole($hash{'src_'.$current_resource});
	} else {
	    my $presymb; 
	    if ($mainsequence =~ /\/res\/(.*)$/) {$presymb = $1;} 
              elsif ($mainsequence =~ /\/?(uploaded\/(.*))$/) {$presymb = $1;} 
	    my $rid = $hash{'ids_'.$hash{'src_'.$current_resource}};
	    if ($rid=~/,/) {
		my @rid = split /,/, $rid;
		foreach my $rid_element (@rid) {
		    if ($rid_element =~ m/^$mapid\.(\d*)/) {
			$rid = $1; 
			last;
		    }
		}
	    } else {
	        $rid =~ m/^$mapid\.(\d*)/;
                $rid = $1;  
	    }
	    $hash{'src_'.$current_resource} =~ m/\/res\/(.*)$/;
	    my $symb = $presymb.'___'.$rid.'___'.$1;	    
	    push @resourcelist,$hash{'src_'.$current_resource}.'&&'.$symb;
	}
	$current_resource = $hash{'goesto_'.$hash{'to_'.$current_resource}};
    }
    return @resourcelist;
}


sub coming_from_hash {

    my ($mainsequence,$symb) = @_;
    my @resourcelist = ();
    my $mapid = $hash{'map_pc_'.$mainsequence};
    my $mapstart = $hash{'map_start_'.$mainsequence};
    my $mapfinish = $hash{'map_finish_'.$mainsequence};
    my ($presymb);
    if ($symb) {
	($presymb)=split(/___/,$symb);
    } else {
	$presymb=$mainsequence;
	$presymb=~s|^/res/||;
    }
    $presymb = $presymb.'___';
    my $current_resource = $mapstart;
    while ($current_resource ne $mapfinish) {
	if (not $hash{'src_'.$current_resource}=~/\.sequence$/) {
	    my $rid = $hash{'ids_'.$hash{'src_'.$current_resource}};
            if ($rid=~/,/) {
		my @rid = split /,/, $rid;
		foreach my $rid_element (@rid) {
		    if ($rid_element =~ m/^$mapid\.(\d*)/) {
			$rid = $1; 
			last;
		    }
		}
	    } else {
		$rid =~ m/^$mapid\.(\d*)/;
                $rid = $1;  
	    }
	    $hash{'src_'.$current_resource} =~ m/\/res\/(.*)$/;
	    $symb = $presymb.$rid.'___'.$1;
	    push @resourcelist,$hash{'src_'.$current_resource}.'&&'.$symb;
	} else {
	    push @resourcelist,&coming_from_hash($hash{'src_'.$current_resource});
	}
	$current_resource = $hash{'goesto_'.$hash{'to_'.$current_resource}};
    }
    #needs if final resource in the map (type="finish") contains something
    if (not $hash{'src_'.$current_resource}=~/\.sequence$/) {
		    my $rid = $hash{'ids_'.$hash{'src_'.$current_resource}};
            if ($rid=~/,/) {
		my @rid = split /,/, $rid;
		foreach my $rid_element (@rid) {
		    if ($rid_element =~ m/^$mapid\.(\d*)/) {
			$rid = $1; 
			last;
		    }
		}
	    } else {
		$rid =~ m/^$mapid\.(\d*)/;
                $rid = $1;  
	    }
	    $hash{'src_'.$current_resource} =~ m/\/res\/(.*)$/;
	    $symb = $presymb.$rid.'___'.$1;
	push @resourcelist,$hash{'src_'.$current_resource}.'&&'.$symb;
    } else {
	push @resourcelist,&coming_from_hash($hash{'src_'.$current_resource});
    }
    return @resourcelist;
}


sub titles_coming_from_hash {

    my ($mainsequence,$symb) = @_;
    my @resourcelist = ();
    my $mapid = $hash{'map_pc_'.$mainsequence};
    my $mapstart = $hash{'map_start_'.$mainsequence};
    my $mapfinish = $hash{'map_finish_'.$mainsequence};
    my ($presymb);
    if ($symb) {
	($presymb)=split(/___/,$symb);
    } else {
	$presymb=$mainsequence;
	$presymb=~s|^/res/||;
    }
    $presymb = $presymb.'___';
    my $current_resource = $mapstart;
    while ($current_resource ne $mapfinish) {
	if (not $hash{'src_'.$current_resource}=~/\.sequence$/) {
	    my $rid = $hash{'ids_'.$hash{'src_'.$current_resource}};
            if ($rid=~/,/) {
		my @rid = split /,/, $rid;
		foreach my $rid_element (@rid) {
		    if ($rid_element =~ m/^$mapid\.(\d*)/) {
			$rid = $1; 
			last;
		    }
		}
	    } else {
		$rid =~ m/^$mapid\.(\d*)/;
                $rid = $1;  
	    }
	    $hash{'src_'.$current_resource} =~ m/\/res\/(.*)$/;
	    $symb = $presymb.$rid.'___'.$1;
	    push @resourcelist,$hash{'title_'.$current_resource}.'&&'.$symb;
	} else {
	    push @resourcelist,&titles_coming_from_hash($hash{'src_'.$current_resource});
	}
	$current_resource = $hash{'goesto_'.$hash{'to_'.$current_resource}};
    }
    #needs if final resource in the map (type="finish") contains something
    if (not $hash{'src_'.$current_resource}=~/\.sequence$/) {
		    my $rid = $hash{'ids_'.$hash{'src_'.$current_resource}};
            if ($rid=~/,/) {
		my @rid = split /,/, $rid;
		foreach my $rid_element (@rid) {
		    if ($rid_element =~ m/^$mapid\.(\d*)/) {
			$rid = $1; 
			last;
		    }
		}
	    } else {
		$rid =~ m/^$mapid\.(\d*)/;
                $rid = $1;  
	    }
	    $hash{'src_'.$current_resource} =~ m/\/res\/(.*)$/;
	    $symb = $presymb.$rid.'___'.$1;
	push @resourcelist,$hash{'title_'.$current_resource}.'&&'.$symb;
    } else {
	push @resourcelist,&titles_coming_from_hash($hash{'src_'.$current_resource});
    }
    return @resourcelist;
}

sub latex_header_footer_remove {
    my $text = shift;
    $text =~ s/\\end{document}//;
    $text =~ s/\\documentclass([^&]*)\\begin{document}//;
    return $text;
}


sub character_chart {
    my $result = shift;	
    $result =~ s/&#0?0?7;//g;
    $result =~ s/&#0?0?9;//g;
    $result =~ s/&#0?10;//g;
    $result =~ s/&#0?13;//g;
    $result =~ s/&#0?32;/ /g;
    $result =~ s/&#0?33;/!/g;
    $result =~ s/&#0?34;/"/g;
    $result =~ s/&quot;/"/g;   #"
    $result =~ s/&#0?35;/\\#/g;
#    $result =~ s/&#0?36;/\\\$/g;
    $result =~ s/&#0?37;/\\%/g; 
    $result =~ s/&#0?38;/\\&/g; 
    $result =~ s/&amp;/\\&/g;
    $result =~ s/&#0?39;/'/g;
    $result =~ s/&#0?40;/(/g;
    $result =~ s/&#0?41;/)/g;
    $result =~ s/&#0?42;/\*/g;
    $result =~ s/&#0?43;/\+/g;
    $result =~ s/&#0?44;/,/g;
    $result =~ s/&#0?45;/-/g;
    $result =~ s/&#0?46;/\./g;
    $result =~ s/&#0?47;/\//g;
    $result =~ s/&#0?48;/0/g;
    $result =~ s/&#0?49;/1/g;
    $result =~ s/&#0?50;/2/g;
    $result =~ s/&#0?51;/3/g;
    $result =~ s/&#0?52;/4/g;
    $result =~ s/&#0?53;/5/g;
    $result =~ s/&#0?54;/6/g;
    $result =~ s/&#0?55;/7/g;
    $result =~ s/&#0?56;/8/g;
    $result =~ s/&#0?57;/9/g;
    $result =~ s/&#0?58;/:/g;
    $result =~ s/&#0?59;/;/g;
    $result =~ s/&#0?60;/\$<\$/g;
    $result =~ s/&lt;/\$<\$/g;
    $result =~ s/&#0?61;/\$=\$/g;
    $result =~ s/&#0?62;/\$>\$/g;
    $result =~ s/&gt;/\$>\$/g;
    $result =~ s/&#0?63;/?/g;
#    $result =~ s/&#0?64;//g;
    $result =~ s/&#0?65;/A/g;
    $result =~ s/&#0?66;/B/g;
    $result =~ s/&#0?67;/C/g;
    $result =~ s/&#0?68;/D/g;
    $result =~ s/&#0?69;/E/g;
    $result =~ s/&#0?70;/F/g;
    $result =~ s/&#0?71;/G/g;
    $result =~ s/&#0?72;/H/g;
    $result =~ s/&#0?73;/I/g;
    $result =~ s/&#0?74;/J/g;
    $result =~ s/&#0?75;/K/g;
    $result =~ s/&#0?76;/L/g;
    $result =~ s/&#0?77;/M/g;
    $result =~ s/&#0?78;/N/g;
    $result =~ s/&#0?79;/O/g;
    $result =~ s/&#0?80;/P/g;
    $result =~ s/&#0?81;/Q/g;
    $result =~ s/&#0?82;/R/g;
    $result =~ s/&#0?83;/S/g;
    $result =~ s/&#0?84;/T/g;
    $result =~ s/&#0?85;/U/g;
    $result =~ s/&#0?86;/V/g;
    $result =~ s/&#0?87;/W/g;
    $result =~ s/&#0?88;/X/g;
    $result =~ s/&#0?89;/Y/g;
    $result =~ s/&#0?90;/Z/g;
    $result =~ s/&#0?91;/[/g;
    $result =~ s/&#0?92;/\\/g;
    $result =~ s/&#0?93;/]/g;
#    $result =~ s/&#0?94;//g;
#    $result =~ s/&#0?95;//g;
    $result =~ s/&#0?96;/`/g;
    $result =~ s/&#0?97;/a/g;
    $result =~ s/&#0?98;/b/g;
    $result =~ s/&#0?99;/c/g;
    $result =~ s/&#100;/d/g;
    $result =~ s/&#101;/e/g;
    $result =~ s/&#102;/f/g;
    $result =~ s/&#103;/g/g;
    $result =~ s/&#104;/h/g;
    $result =~ s/&#105;/i/g;
    $result =~ s/&#106;/j/g;
    $result =~ s/&#107;/k/g;
    $result =~ s/&#108;/l/g;
    $result =~ s/&#109;/m/g;
    $result =~ s/&#110;/n/g;
    $result =~ s/&#111;/o/g;
    $result =~ s/&#112;/p/g;
    $result =~ s/&#113;/q/g;
    $result =~ s/&#114;/r/g;
    $result =~ s/&#115;/s/g;
    $result =~ s/&#116;/t/g;
    $result =~ s/&#117;/u/g;
    $result =~ s/&#118;/v/g;
    $result =~ s/&#119;/w/g;
    $result =~ s/&#120;/x/g;
    $result =~ s/&#121;/y/g;
    $result =~ s/&#122;/z/g;
    $result =~ s/&#123;/\\{/g;
    $result =~ s/&#124;/\|/g;
    $result =~ s/&#125;/\\}/g;
    $result =~ s/&#126;/\~/g;
    $result =~ s/&#130;/,/g;
#    $result =~ s/&#131;//g;
    $result =~ s/&#132;/''/g;
    $result =~ s/&#133;/\$\\ldots\$/g;
    $result =~ s/&#134;/\$\\dagger\$/g;
    $result =~ s/&#135;/\$\\ddagger\$/g;
#    $result =~ s/&#136;//g;
#    $result =~ s/&#137;//g;
#    $result =~ s/&#138;//g;
    $result =~ s/&#139;/\$<\$/g;
#    $result =~ s/&#140;//g;
    $result =~ s/&#145;/`/g;
    $result =~ s/&#146;/'/g;
    $result =~ s/&#147;/``/g;
    $result =~ s/&#148;/''/g;
    $result =~ s/&#149;/\$\\bullet\$/g;
#    $result =~ s/&#150;//g;
#    $result =~ s/&#151;//g;
    $result =~ s/&#152;/~/g;
#    $result =~ s/&#153;//g;
#    $result =~ s/&#154;//g;
    $result =~ s/&#155;/\$>\$/g;
    $result =~ s/&#156;/\\{\\oe\\}/g;
    $result =~ s/&#159;/\\"\\{Y\\}/g;
    $result =~ s/&#160;//g;
    $result =~ s/&nbsp;//g;
    $result =~ s/&#161;/!`/g;
    $result =~ s/&iexcl;/!`/g; #`
#    $result =~ s/&#162;//g;
#    $result =~ s/&cent;//g;
    $result =~ s/&#163;/\\pounds/g; 
    $result =~ s/&pound;/\\pounds/g;
#    $result =~ s/&#164;//g;
#    $result =~ s/&curren;//g;
#    $result =~ s/&#165;//g;
#    $result =~ s/&yen;//g;
#    $result =~ s/&#166;//g;
#    $result =~ s/&brvbar;//g;
#    $result =~ s/&#167;//g;
#    $result =~ s/&sect;//g;
#    $result =~ s/&#168;//g;
#    $result =~ s/&uml;//g;
    $result =~ s/&#169;/\\copyright/g;
    $result =~ s/&copy;/\\copyright/g;
#    $result =~ s/&#170;//g;
#    $result =~ s/&ordf;//g;
#    $result =~ s/&#171;//g;
#    $result =~ s/&laquo;//g;
    $result =~ s/&#172;/\$\\neg\$/g;
    $result =~ s/&not;/\$\\neg\$/g;
#    $result =~ s/&#173;//g;
#    $result =~ s/&shy;//g;
#    $result =~ s/&#174;//g;
#    $result =~ s/&reg;//g;
#    $result =~ s/&#175;//g;
#    $result =~ s/&macr;//g;
    $result =~ s/&#176;/\$^{\\circ}\$/g;
    $result =~ s/&deg;/\$^{\\circ}\$/g;
    $result =~ s/&#177;/\$\\pm\$/g;
    $result =~ s/&plusmn;/\$\\pm\$/g;
    $result =~ s/&#178;/\$^2\$/g;
    $result =~ s/&sup2;/\$^2\$/g;
    $result =~ s/&#179;/\$^3\$/g;
    $result =~ s/&sup3;/\$^3\$/g;
#    $result =~ s/&#180;//g;
#    $result =~ s/&acute;//g;
    $result =~ s/&#181;/\$\\mu\$/g;
    $result =~ s/&micro;/\$\\mu\$/g;
    $result =~ s/&#182;/\\P/g;
    $result =~ s/&para;/\\P/g;
    $result =~ s/&#183;/\$\\cdot\$/g;
    $result =~ s/&middot;/\$\\cdot\$/g;
#    $result =~ s/&#184;//g;
#    $result =~ s/&cedil;//g;
    $result =~ s/&#185;/\$^1\$/g;
    $result =~ s/&sup1;/\$^1\$/g;
#    $result =~ s/&#186;//g;
#    $result =~ s/&ordm;//g;
#    $result =~ s/&#187;//g;
#    $result =~ s/&raquo;//g;
#    $result =~ s/&#188;//g;
#    $result =~ s/&frac14;//g;
#    $result =~ s/&#189;//g;
#    $result =~ s/&frac12;//g;
#    $result =~ s/&#190;//g;
#    $result =~ s/&frac34;//g;
    $result =~ s/&#191;/?`/g;   
    $result =~ s/&iquest;/?`/g;      #`
    $result =~ s/&#192;/\\`{A}/g; 
    $result =~ s/&Agrave;/\\`{A}/g;  #` 
    $result =~ s/&#193;/\\'{A}/g; 
    $result =~ s/&Aacute;/\\'{A}/g;  #'
    $result =~ s/&#194;/\\^{A}/g;
    $result =~ s/&Acirc;/\\^{A}/g;
    $result =~ s/&#195;/\\~{A}/g;
    $result =~ s/&Atilde;/\\~{A}/g;
    $result =~ s/&#196;/\\"{A}/g; 
    $result =~ s/&Auml;/\\"{A}/g;    #"
    $result =~ s/&#197;/{\\AA}/g;
    $result =~ s/&Aring;/{\\AA}/g;
    $result =~ s/&#198;/{\\AE}/g;
    $result =~ s/&AElig;/{\\AE}/g;
#    $result =~ s/&#199;//g;
#    $result =~ s/&Ccedil;//g;
    $result =~ s/&#200;/\\`{E}/g;  
    $result =~ s/&Egrave;/\\`{E}/g;  #`
    $result =~ s/&#201;/\\'{E}/g;    #'
    $result =~ s/&Eacute;/\\'{E}/g;  #'
    $result =~ s/&#202;/\\^{E}/g;
    $result =~ s/&Ecirc;/\\^{E}/g;
    $result =~ s/&#203;/\\`{E}/g;
    $result =~ s/&Euml;/\\`{E}/g;    #`
    $result =~ s/&#204;/\\`{I}/g;
    $result =~ s/&Igrave;/\\`{I}/g;  #`
    $result =~ s/&#205;/\\'{I}/g;    
    $result =~ s/&Iacute;/\\'{I}/g;  #'
    $result =~ s/&#206;/\\^{I}/g;
    $result =~ s/&Icirc;/\\^{I}/g;
    $result =~ s/&#207;/\\"{I}/g;    
    $result =~ s/&Iuml;/\\"{I}/g;    #"
#    $result =~ s/&#208;//g;
#    $result =~ s/&ETH;//g;
    $result =~ s/&#209;/\\~{N}/g;
    $result =~ s/&Ntilde;/\\~{N}/g;
    $result =~ s/&#210;/\\`{O}/g;
    $result =~ s/&Ograve;/\\`{O}/g;  #`
    $result =~ s/&#211;/\\'{O}/g;
    $result =~ s/&Oacute;/\\'{O}/g;  #'
    $result =~ s/&#212;/\\^{O}/g;
    $result =~ s/&Ocirc;/\\^{O}/g;
    $result =~ s/&#213;/\\~{O}/g;
    $result =~ s/&Otilde;/\\~{O}/g;
    $result =~ s/&#214;/\\"{O}/g;    
    $result =~ s/&Ouml;/\\"{O}/g;    #"
    $result =~ s/&#215;/\$\\times\$/g;
    $result =~ s/&times;/\$\\times\$/g;
    $result =~ s/&#216;/{\\O}/g;
    $result =~ s/&Oslash;/{\\O}/g;
    $result =~ s/&#217;/\\`{U}/g;    
    $result =~ s/&Ugrave;/\\`{U}/g;  #`
    $result =~ s/&#218;/\\'{U}/g;    #'
    $result =~ s/&Uacute;/\\'{U}/g;  #'
    $result =~ s/&#219;/\\^{U}/g;
    $result =~ s/&Ucirc;/\\^{U}/g;
    $result =~ s/&#220;/\\"{U}/g;    #"
    $result =~ s/&Uuml;/\\"{U}/g;    #"
    $result =~ s/&#221;/\\'{Y}/g;
    $result =~ s/&Yacute;/\\'{Y}/g;  #'
#    $result =~ s/&#222;//g;
#    $result =~ s/&THORN;//g;
#    $result =~ s/&#223;//g;
#    $result =~ s/&szlig;//g;
    $result =~ s/&#224;/\\`{a}/g;
    $result =~ s/&agrave;/\\`{a}/g;  #`
    $result =~ s/&#225;/\\'{a}/g;
    $result =~ s/&aacute;/\\'{a}/g;  #'
    $result =~ s/&#226;/\\^{a}/g;
    $result =~ s/&acirc;/\\^{a}/g;
    $result =~ s/&#227;/\\~{a}/g;
    $result =~ s/&atilde;/\\~{a}/g;
    $result =~ s/&#228;/\\"{a}/g;
    $result =~ s/&auml;/\\"{a}/g;    #"
    $result =~ s/&#229;/{\\aa}/g;
    $result =~ s/&aring;/{\\aa}/g;
    $result =~ s/&#230;/{\\ae}/g;
    $result =~ s/&aelig;/{\\ae}/g;
#    $result =~ s/&#231;//g;
#    $result =~ s/&ccedil;//g;
    $result =~ s/&#232;/\\`{e}/g;
    $result =~ s/&egrave;/\\`{e}/g;  #`
    $result =~ s/&#233;/\\'{e}/g;
    $result =~ s/&eacute;/\\'{e}/g;  #'
    $result =~ s/&#234;/\\^{e}/g;
    $result =~ s/&ecirc;/\\^{e}/g;
    $result =~ s/&#235;/\\"{e}/g;
    $result =~ s/&euml;/\\"{e}/g;    #"
    $result =~ s/&#236;/\\`{i}/g;
    $result =~ s/&igrave;/\\`{i}/g;  #`
    $result =~ s/&#237;/\\'{i}/g;
    $result =~ s/&iacute;/\\'{i}/g;  #'
    $result =~ s/&#238;/\\^{i}/g;
    $result =~ s/&icirc;/\\^{i}/g;
    $result =~ s/&#239;/\\"{i}/g;
    $result =~ s/&iuml;/\\"{i}/g;    #"
#    $result =~ s/&#240;//g;
#    $result =~ s/&eth;//g;
    $result =~ s/&#241;/\\~{n}/g;
    $result =~ s/&ntilde;/\\~{n}/g;
    $result =~ s/&#242;/\\`{o}/g;
    $result =~ s/&ograve;/\\`{o}/g;  #`
    $result =~ s/&#243;/\\'{o}/g;
    $result =~ s/&oacute;/\\'{o}/g;  #'
    $result =~ s/&#244;/\\^{o}/g;
    $result =~ s/&ocirc;/\\^{o}/g;
    $result =~ s/&#245;/\\~{o}/g;
    $result =~ s/&otilde;/\\~{o}/g;
    $result =~ s/&#246;/\\"{o}/g;
    $result =~ s/&ouml;/\\"{o}/g;    #"
    $result =~ s/&#247;/\$\\div\$/g;
    $result =~ s/&divide;/\$\\div\$/g;
    $result =~ s/&#248;/{\\o}/g;
    $result =~ s/&oslash;/{\\o}/g;
    $result =~ s/&#249;/\\`{u}/g; 
    $result =~ s/&ugrave;/\\`{u}/g;  #` 
    $result =~ s/&#250;/\\'{u}/g;
    $result =~ s/&uacute;/\\'{u}/g;  #'
    $result =~ s/&#251;/\\^{u}/g;
    $result =~ s/&ucirc;/\\^{u}/g;
    $result =~ s/&#252;/\\"{u}/g;
    $result =~ s/&uuml;/\\"{u}/g;    #"
    $result =~ s/&#253;/\\'{y}/g;
    $result =~ s/&yacute;/\\'{y}/g;  #'
#    $result =~ s/&#254;//g;
#    $result =~ s/&thorn;//g;
    $result =~ s/&#255;/\\"{y}/g;
    $result =~ s/&yuml;/\\"{y}/g;    #"
    $result =~ s/&#952;/\$\\theta\$/g; #converts theta from html into tex
    return $result;
}


    sub page_format {
	my ($papersize,$layout,$numberofcolumns) = @_; 
	my ($textwidth,$textheight,$oddoffset,$evenoffset) = (0,0,0,0);
	if ($papersize=~/Letter/) {
	    if ($layout eq 'CAPA') {
		if ($numberofcolumns == 1) {
		    $textwidth = '18 cm';
		    $textheight = '25.9 cm';
		    $oddoffset = '-0.57 in';
		    $evenoffset = '-0.57 in';
		} elsif ($numberofcolumns == 2) {
		    $textwidth = '93 mm';
		    $textheight = '25.9 cm';
		    $oddoffset = '-0.57 in';
		    $evenoffset = '-0.57 in';
		}
	    } elsif ($layout eq 'CBI') {
		if ($numberofcolumns eq '1') {
		    $textwidth = '8.8 in';
		    $textheight = '6.8 in';
		    $oddoffset = '-40 pt';
		    $evenoffset = '-60 pt';
		} elsif ($numberofcolumns == 2) {
		    $textwidth = '4.2 in';
		    $textheight = '6.8 in';
		    $oddoffset = '-40 pt';
		    $evenoffset = '-60 pt';
		}
	    }
#    } elsif($papersize=~/Legal/) {
#    } elsif($papersize=~/Ledger/) {
#    } elsif($papersize=~/Executive/) {
    } elsif($papersize=~/A4/) {
	    if ($layout eq 'CAPA') {
		if ($numberofcolumns == 1) {
		    $textwidth = '18 cm';
		    $textheight = '28 cm';
		    $oddoffset = '-0.57 in';
		    $evenoffset = '-0.57 in';
		} elsif ($numberofcolumns == 2) {
		    $textwidth = '96 mm';
		    $textheight = '2 cm';
		    $oddoffset = '-0.57 in';
		    $evenoffset = '-0.57 in';
		}
	    } elsif ($layout eq 'CBI') {
		if ($numberofcolumns eq '1') {
		    $textwidth = '8.5 in';
		    $textheight = '7.7 in';
		    $oddoffset = '-40 pt';
		    $evenoffset = '-60 pt';
		} elsif ($numberofcolumns == 2) {
		    $textwidth = '3.9 in';
		    $textheight = '7.7 in';
		    $oddoffset = '-40 pt';
		    $evenoffset = '-60 pt';
		}
	    }
#    } elsif($papersize=~/A3/) {
#    } elsif($papersize=~/A2/) {
#    } elsif($papersize=~/A5/) {
#    } elsif($papersize=~/A6/) {
	}
	return $textwidth,$textheight,$oddoffset,$evenoffset;
    }


sub page_format_transformation {
    my ($papersize,$layout,$numberofcolumns,$choice,$text,$assignment) = @_; 
    my ($textwidth,$textheight,$oddoffset,$evenoffset);
	$assignment=~s/_/ /g;
        if ($numberofcolumns != 1) {
          ($textwidth,$textheight,$oddoffset,$evenoffset) = &page_format($papersize,$layout,$numberofcolumns);
	} else {
	  ($textwidth,$textheight,$oddoffset,$evenoffset) = ($ENV{'form.width'},$ENV{'form.height'},$ENV{'form.leftmargin'},$ENV{'form.leftmargin'});
	}
    my $firstname = &special_character_corrections(&Apache::lonnet::unescape($ENV{'environment.firstname'}));
    my $lastname = &special_character_corrections(&Apache::lonnet::unescape($ENV{'environment.lastname'}));
    my $courseidinfo = &special_character_corrections(&Apache::lonnet::unescape($ENV{'course.'.$ENV{'request.course.id'}.'.description'}));
    if ($layout eq 'CBI') {
	    $text =~ s/\\begin{document}/\\setlength{\\oddsidemargin}{$oddoffset}\\setlength{\\evensidemargin}{$evenoffset}\\setlength{\\topmargin}{200pt}\\setlength{\\textwidth}{$textwidth}\\setlength{\\textheight}{$textheight}\\setlength{\\parindent}{20pt}\\setlength{\\marginparwidth}{90pt}\\setlength{\\textfloatsep}{8pt plus 2\.0pt minus 4\.0pt}\\newlength{\\minipagewidth}\\setlength{\\minipagewidth}{\\textwidth\/\$number_of_columns-0\.2cm} \\begin{document}\\setcounter{page}{1}\\noindent\\parbox{\\minipagewidth}{\\noindent\\fbox{\\textbf{$firstname $lastname}} \\hfill  $courseidinfo} \\vskip 5 mm /;
    } elsif ($layout eq 'CAPA') {
	if ($choice ne 'All class print') { 
		$text =~ s/\\begin{document}/\\textheight $textheight\\oddsidemargin = $evenoffset\\evensidemargin = $evenoffset\\textwidth= $textwidth\\newlength{\\minipagewidth}\\setlength{\\minipagewidth}{\\textwidth\/\$number_of_columns-0\.2cm}\\renewcommand{\\ref}{\\keephidden\}\\setlength{\\topmargin}{1cm}\\setlength{\\headheight}{1cm}\\setlength{\\headsep}{0.5cm}\\markboth{}{\\textbf{$firstname $lastname} $courseidinfo - $assignment}\\pagestyle{myheadings}\\begin{document}\\voffset=-1\.8cm\\setcounter{page}{1}/;
	} else {
		$text =~ s/\\begin{document}/\\textheight $textheight\\oddsidemargin = $evenoffset\\evensidemargin = $evenoffset\\textwidth= $textwidth\\newlength{\\minipagewidth}\\setlength{\\minipagewidth}{\\textwidth\/\$number_of_columns-0\.2cm}\\renewcommand{\\ref}{\\keephidden\}\\begin{document}\\voffset=-1\.8cm\\setcounter{page}{1}  \\vskip 5 mm /;
	}
    }
    return $text;
}


sub page_cleanup {
    my $result = shift;	
 
    $result =~ m/\\end{document}(\d*)$/;
    my $number_of_columns = $1;
    my $insert = '{';
    for (my $id=1;$id<=$number_of_columns;$id++) { $insert .='l'; }
    $insert .= '}';
    $result =~ s/(\\begin{longtable})INSERTTHEHEADOFLONGTABLE\\endfirsthead\\endhead/$1$insert/g;
    $result =~ s/&\s*REMOVETHEHEADOFLONGTABLE\\\\/\\\\/g;
    return $result,$number_of_columns;
}


sub details_for_menu {

    my $name_of_resourse = $hash{'title_'.$hash{'ids_'.$ENV{'form.postdata'}}};
    my $symbolic = &Apache::lonnet::symbread($ENV{'form.postdata'});
    my ($map,$id,$resource)=split(/___/,$symbolic);
    my $name_of_sequence;
    if ($map=~/^uploaded/) {
	$name_of_sequence = $hash{'title_'.$hash{'ids_/'.$map}};
    } else {
	$name_of_sequence = $hash{'title_'.$hash{'ids_/res/'.$map}};
    }
    if ($name_of_sequence =~ /^\s*$/) {
     $map =~ m|([^/]+)$|;
      $name_of_sequence = $1;
    }
    my $name_of_map = $hash{'title_'.$hash{'ids_/res/'.$ENV{'request.course.uri'}}};
    if ($name_of_map =~ /^\s*$/) {
      $ENV{'request.course.uri'} =~ m|([^/]+)$|;
      $name_of_map = $1;
    }  
    return ($name_of_resourse,$name_of_sequence,$name_of_map);

}


sub special_character_corrections {
    my $argument = shift;
    $argument =~ s/_/ /g;
    $argument =~ s/\^/ /g;
    $argument =~ s/&/\\&/g;
    return $argument;
}


sub latex_corrections {

    my ($number_of_columns,$result) = @_;

    $result =~ s/\\includegraphics{/\\includegraphics\[width=\\minipagewidth\]{/g;
    $result =~ s/\$number_of_columns/$number_of_columns/g;
    $result =~ s/(\\end{document})/\\strut\\newline\\noindent\\makebox\[\\textwidth\/$number_of_columns\]\[b\]{\\hrulefill}\\newline\\noindent\\tiny Printed from LON-CAPA\\copyright MSU{\\hfill} Licensed under GNU General Public License  $1/;
    $result =~ s/(\\end{longtable}\s*)(\\strut\\newline\\noindent\\makebox\[\\textwidth\/$number_of_columns\]\[b\]{\\hrulefill})/$2$1/g;
    $result =~ s/(\\end{longtable}\s*)\\strut\\newline/$1/g;
#-- LaTeX corrections     
    my $first_comment = index($result,'<!--',0);
    while ($first_comment != -1) {
	my $end_comment = index($result,'-->',$first_comment);
	substr($result,$first_comment,$end_comment-$first_comment+3) = '';
	$first_comment = index($result,'<!--',$first_comment);
    }
    $result =~ s/^\s+$//gm; #remove empty lines
    $result =~ s/(\s)(\s+)/$1/g; #removes more than one empty space
    $result =~ s/\\\\\s*\\vskip/\\vskip/gm;
    $result =~ s/\\\\\s*\\noindent\s*(\\\\)+/\\\\\\noindent /g;
    $result =~ s/{\\par }\s*\\\\/\\\\/gm;
	$result =~ s/\\\\\s+\[/ \[/g;
    $result =~ s/\b__+\b/\\makebox\[1 cm\]\[b\]{\\hrulefill}/g;
    #conversion of html characters to LaTeX equivalents
    if ($result =~ m/&(\w+|#\d+);/) {
	$result = &character_chart($result);
    }
    $result =~ s/(\\end{tabular})\s*\\vskip 0 mm/$1/g;
    $result =~ s/(\\begin{enumerate})\s*\\noindent/$1/g;

    return $result;
}


sub handler {

    my $r = shift;

    my $loaderror=&Apache::lonnet::overloaderror($r);
    if ($loaderror) { return $loaderror; }
    $loaderror=
       &Apache::lonnet::overloaderror($r,
         $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
    if ($loaderror) { return $loaderror; }

    $r->content_type('text/html');
    $r->send_http_header;
    $r->print(&Apache::loncommon::bodytag("Printing"));

    if ($ENV{'request.course.id'}) {
	my $fn=$ENV{'request.course.fn'};
	tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640);
    }

#-- start form
    &headerform($r);
#-- menu for output
    unless  ($ENV{'form.phase'}) {
	&menu_for_output($r);
    }
#-- additional menu for class printing
     if ($ENV{'form.phase'} eq 'two') {
	 if($ENV{'form.choice'} eq 'Standard LaTeX output for whole primary sequence') {
	     &sequence_content_menu(0,$r);
	 } elsif($ENV{'form.choice'} eq 'Standard LaTeX output for the primary sequence') {
	     &sequence_content_menu(1,$r);
	 } elsif($ENV{'form.choice'} eq 'All class print') {
	     &additional_class_menu($r);
	 } elsif($ENV{'form.choice'} eq 'Subdirectory print') {
	     &problem_choice_menu($r);
	 } else {
	     $ENV{'form.phase'} = 'three';
	 }
     }
#-- additional menu for page layout (one column case)
    if ($ENV{'form.phase'} eq 'three') {
	if($ENV{'form.numberofcolumns'} == 1) {
	    &additional_print_menu($r);
	} else {
	    $ENV{'form.phase'} = 'four';
	}
    }
#-- core part 
    if ($ENV{'form.phase'} eq 'four') {
	&output_data($r);
    }	
    untie %hash;
    return OK;
   
} 


1;
__END__
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