File:  [LON-CAPA] / loncom / interface / lonprintout.pm
Revision 1.169: download - view: text, annotated - select for diffs
Wed May 14 17:33:59 2003 UTC (21 years, 6 months ago) by albertel
Branches: MAIN
CVS tags: HEAD
- add rndseed to passed balues

# The LearningOnline Network
# Printout
#
# $Id: lonprintout.pm,v 1.169 2003/05/14 17:33:59 albertel 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);
    $primary_sequence=&Apache::lonnet::clutter($sequence[0]);
    my @master_seq = &coming_from_hash($primary_sequence);
    my @titles_master_seq = (); 
    for (my $i=0;$i<=$#master_seq;$i++) {
	my ($path,$title,$symb) = split /&&/,$master_seq[$i];
	$master_seq[$i] = $path.'&&'.$symb;
        push @titles_master_seq,  $title;
    }
    my @master_seq_view = @master_seq;
    if ($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>
<b>
<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 = ();
    $r->print("Subdir: " . $subdirtoprint . "<br />");
    if ($subdirtoprint =~ m|/home/([^/]+)/public_html|) {
	#localmachine CSTR space
	my $user=$1;
	my $domain=$Apache::lonnet::perlvar{'lonDefDomain'};
	@content_directory = &Apache::lonnet::dirlist($subdirtoprint,
						      $domain, $user,'');
    } else {
        #local library server res space (allows to print only from the own library server)
	@content_directory = &Apache::lonnet::dirlist($subdirtoprint,$ENV{'user.domain'}, $ENV{'user.name'},'');
    }
    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'});
	   if ($section == -1) { $section = ''; }
           $r->print(
        '<br /><input type=checkbox name="whomtoprint'.$i.'" value="'.$section.':'.$_.'"> '.
		      $reply{'firstname'}.' '. 
                      $reply{'middlename'}.' '.
                      $reply{'lastname'}.' '.
                      $reply{'generation'}.
                      ' ('.$_.') '.$section);
	   $i++;
        } 
    }
    $r->print(<<ENDMENUOUT2);
<br /><br /><br />
<table><tr><td width=300>Number of blank pages added to each student assignments to print these assignments on physically different sheets (<b>requires manual addjustment</b>): <select name="addedpages"><option selected>0</option>
                                                                            <option>1</option>
                                                                            <option>2</option>
                                                                            <option>3</option>
                                                  </select></td></tr></table>
<br /> 
<input type="hidden" name="papersize" value="$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)$/) {
        my %moreenv;
        if (&Apache::lonnet::allowed('bre',$ENV{'form.url'})) {
	  $ENV{'form.url'}=~s/http:\/\/[^\/]+//;
        }
        $moreenv{'request.filename'}=$ENV{'form.url'};
	my %form;
        $form{'textwidth'}=$LaTeXwidth;
        $form{'grade_target'}='tex';
        &Apache::lonnet::appenv(%moreenv);
        my $texversion=&Apache::lonnet::ssi($ENV{'form.url'},%form);
        &Apache::lonnet::delenv('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 %form;
	   $form{'textwidth'}=$LaTeXwidth;
	   $form{'grade_target'}='tex';
	   $form{'symb'}=$symb;
	   #&Apache::lonnet::logthis("Trying to get $urlp with symb $symb");
	   my $texversion=&Apache::lonnet::ssi($urlp,%form);
	   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 $main_seq=&Apache::lonnet::clutter($ENV{'request.course.uri'});
	my @file_seq = &coming_from_hash($main_seq);
	for (my $i=0;$i<=$#file_seq;$i++) {
	    my ($path,$title,$symb) = split /&&/,$file_seq[$i];
	    $file_seq[$i] = $path.'&&'.$symb;
	}
	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 %form;
		$form{'grade_target'}='tex';
		$form{'textwidth'}=$LaTeXwidth;
		$form{'symb'}=$symb;
		my $texversion=&Apache::lonnet::ssi($urlp,%form);
		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;

	$primary_sequence=&Apache::lonnet::clutter($sequence[0]);
	my @master_seq = &coming_from_hash($primary_sequence); 
	for (my $i=0;$i<=$#master_seq;$i++) {
	    my ($path,$title,$symb) = split /&&/,$master_seq[$i];
	    $master_seq[$i] = $path.'&&'.$symb;
	}
        #loop over students
	my $flag_latex_header_remove = 'NO'; 
	my %moreenv;
	$moreenv{'form.textwidth'}=$LaTeXwidth;
	&Apache::lonnet::appenv(%moreenv);
	my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,'Print Status','Class Print Status',$#students+1);
	foreach my $person (@students) {
	    my $current_output = ''; 
	    my ($usersection,$username,$userdomain) = split /:/,$person;
	    my $fullname = &get_name($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';
		}
	    }
	    my $courseidinfo = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
	    if ($current_output=~/\\documentclass/) {
		$current_output =~ s/\\begin{document}/\\setlength{\\topmargin}{1cm}\\usepackage{fancyhdr}\\pagestyle{fancy}\\rhead{}\\chead{} \\begin{document}\\noindent\\lhead{\\textit{\\textbf{$fullname}} - $courseidinfo \\hfill \\thepage \\\\ \\textit{$assignment}}\\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 }\\newpage \\vskip 3mm'.$blanspages.'\setcounter{page}{1}\noindent\parbox{\minipagewidth}{\noindent\\lhead{\\textit{\\textbf{'.$fullname.'}} - '.$courseidinfo.' \\hfill \\thepage \\\\ \\textit{'.$assignment.'}}\hskip 1.4in } \vskip 5 mm '.$current_output;
	    }
	    $result .= $current_output;
	    &Apache::lonnet::delenv('form.counter');	    
	    &Apache::lonxml::init_counter(); 
	    &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
						    'last student '.$fullname);
	}
	&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
	$result .= '\end{document}';
	&Apache::lonnet::delenv('form.textwidth');
    } elsif ($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 %form;
		$form{'grade_target'}='tex';
		$form{'textwidth'}=$LaTeXwidth;
		if ($urlp =~ m|/home/([^/]+)/public_html|) {
		    $urlp =~ s|/home/([^/]*)/public_html|/~$1|;
		} else {
		    $urlp =~ s|^/home/httpd/html||;
		}
		my $texversion=&Apache::lonnet::ssi($urlp,%form);
                #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 {

    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($hash{'src_'.$current_resource});
	} else {
	    my $presymb=&Apache::lonnet::declutter($mainsequence);
	    my $rid = $current_resource;
	    if ($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;  
	    }
	    my $symb = $presymb.'___'.$rid.'___'.
		&Apache::lonnet::declutter($hash{'src_'.$current_resource});
	    push @resourcelist,$hash{'src_'.$current_resource}.'&&'.$hash{'title_'.$current_resource}.'&&'.$symb;
	}
	$current_resource = $hash{'goesto_'.$hash{'to_'.$current_resource}};
    } 
    #needs if final resource in the map (type="finish") contains something
	if ($hash{'src_'.$current_resource}=~/\.sequence$/) {
	    push @resourcelist,&coming_from_hash($hash{'src_'.$current_resource});
	} else {
	    my $presymb=&Apache::lonnet::declutter($mainsequence);
	    my $rid = $current_resource;
	    if ($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;  
	    }
	    my $symb = $presymb.'___'.$rid.'___'.
		&Apache::lonnet::declutter($hash{'src_'.$current_resource});
	    push @resourcelist,$hash{'src_'.$current_resource}.'&&'.$hash{'title_'.$current_resource}.'&&'.$symb;
	}
	$current_resource = $hash{'goesto_'.$hash{'to_'.$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|9);//g;
    $result =~ s/&\#0?(10|13);//g;
    $result =~ s/&\#0?32;/ /g;
    $result =~ s/&\#0?33;/!/g;
    $result =~ s/&(\#0?34|quot);/\"/g;
    $result =~ s/&\#0?35;/\\\#/g;
    $result =~ s/&\#0?36;/\\\$/g;
    $result =~ s/&\#0?37;/\\%/g; 
    $result =~ s/&(\#0?38|amp);/\\&/g; 
    $result =~ s/&\#(0?39|146);/\'/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|130);/,/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|lt|\#139);/\$<\$/g;
    $result =~ s/&\#0?61;/\$=\$/g;
    $result =~ s/&(\#0?62|gt|\#155);/\$>\$/g;
    $result =~ s/&\#0?63;/\?/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;/\$\\setminus\$/g;
    $result =~ s/&\#0?93;/]/g;
    $result =~ s/&\#(0?94|136);/\$\\wedge\$/g;
    $result =~ s/&\#(0?95|138|154);/\\underline{\\makebox[2mm]{\\strut}}/g;
    $result =~ s/&\#(0?96|145);/\`/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/&\#131;/\\textflorin /g;
    $result =~ s/&\#132;/\"/g;
    $result =~ s/&\#133;/\$\\ldots\$/g;
    $result =~ s/&\#134;/\$\\dagger\$/g;
    $result =~ s/&\#135;/\$\\ddagger\$/g;
    $result =~ s/&\#137;/\\textperthousand /g;
    $result =~ s/&\#140;/{\\OE}/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;/\$\\sim\$/g;
    $result =~ s/&\#153;/\\texttrademark /g;
    $result =~ s/&\#156;/\\oe/g;
    $result =~ s/&\#159;/\\\"Y/g;
    $result =~ s/&(\#160|nbsp);//g;
    $result =~ s/&(\#161|iexcl);/!\`/g;
    $result =~ s/&(\#162|cent);/\\textcent /g;
    $result =~ s/&(\#163|pound);/\\pounds /g; 
    $result =~ s/&(\#164|curren);/\\textcurrency /g;
    $result =~ s/&(\#165|yen);/\\textyen /g;
    $result =~ s/&(\#166|brvbar);/\\textbrokenbar /g;
    $result =~ s/&(\#167|sect);/\\textsection /g;
    $result =~ s/&(\#168|uml);/\\texthighdieresis /g;
    $result =~ s/&(\#169|copy);/\\copyright /g;
    $result =~ s/&(\#170|ordf);/\\textordfeminine /g;
    $result =~ s/&(\#172|not);/\$\\neg\$/g;
    $result =~ s/&(\#173|shy);/ - /g;
    $result =~ s/&(\#174|reg);/\\textregistered /g;
    $result =~ s/&(\#175|macr);/\$^{-}\$/g;
    $result =~ s/&(\#176|deg);/\$^{\\circ}\$/g;
    $result =~ s/&(\#177|plusmn);/\$\\pm\$/g;
    $result =~ s/&(\#178|sup2);/\$^2\$/g;
    $result =~ s/&(\#179|sup3);/\$^3\$/g;
    $result =~ s/&(\#180|acute);/\\textacute /g;
    $result =~ s/&(\#181|micro);/\$\\mu\$/g;
    $result =~ s/&(\#182|para);/\\P/g;
    $result =~ s/&(\#183|middot);/\$\\cdot\$/g;
    $result =~ s/&(\#184|cedil);/\\c{\\strut}/g;
    $result =~ s/&(\#185|sup1);/\$^1\$/g;
    $result =~ s/&(\#186|ordm);/\\textordmasculine /g;
    $result =~ s/&(\#188|frac14);/\\textonequarter /g;
    $result =~ s/&(\#189|frac12);/\\textonehalf /g;
    $result =~ s/&(\#190|frac34);/\\textthreequarters /g;
    $result =~ s/&(\#191|iquest);/?\`/g;   
    $result =~ s/&(\#192|Agrave);/\\\`{A}/g;  
    $result =~ s/&(\#193|Aacute);/\\\'{A}/g; 
    $result =~ s/&(\#194|Acirc);/\\^{A}/g;
    $result =~ s/&(\#195|Atilde);/\\~{A}/g;
    $result =~ s/&(\#196|Auml);/\\\"{A}/g; 
    $result =~ s/&(\#197|Aring);/{\\AA}/g;
    $result =~ s/&(\#198|AElig);/{\\AE}/g;
    $result =~ s/&(\#199|Ccedil);/\\c{c}/g;
    $result =~ s/&(\#200|Egrave);/\\\`{E}/g;  
    $result =~ s/&(\#201|Eacute);/\\\'{E}/g;    
    $result =~ s/&(\#202|Ecirc);/\\^{E}/g;
    $result =~ s/&(\#203|Euml);/\\\"{E}/g;
    $result =~ s/&(\#204|Igrave);/\\\`{I}/g;
    $result =~ s/&(\#205|Iacute);/\\\'{I}/g;    
    $result =~ s/&(\#206|Icirc);/\\^{I}/g;
    $result =~ s/&(\#207|Iuml);/\\\"{I}/g;    
    $result =~ s/&(\#209|Ntilde);/\\~{N}/g;
    $result =~ s/&(\#210|Ograve);/\\\`{O}/g;
    $result =~ s/&(\#211|Oacute);/\\\'{O}/g;
    $result =~ s/&(\#212|Ocirc);/\\^{O}/g;
    $result =~ s/&(\#213|Otilde);/\\~{O}/g;
    $result =~ s/&(\#214|Ouml);/\\\"{O}/g;    
    $result =~ s/&(\#215|times);/\$\\times\$/g;
    $result =~ s/&(\#216|Oslash);/{\\O}/g;
    $result =~ s/&(\#217|Ugrave);/\\\`{U}/g;    
    $result =~ s/&(\#218|Uacute);/\\\'{U}/g;
    $result =~ s/&(\#219|Ucirc);/\\^{U}/g;
    $result =~ s/&(\#220|Uuml);/\\\"{U}/g;
    $result =~ s/&(\#221|Yacute);/\\\'{Y}/g;
    $result =~ s/&(\#223|szlig);/\\ss/g;
    $result =~ s/&(\#224|agrave);/\\\`{a}/g;
    $result =~ s/&(\#225|aacute);/\\\'{a}/g;
    $result =~ s/&(\#226|acirc);/\\^{a}/g;
    $result =~ s/&(\#227|atilde);/\\~{a}/g;
    $result =~ s/&(\#228|auml);/\\\"{a}/g;
    $result =~ s/&(\#229|aring);/{\\aa}/g;
    $result =~ s/&(\#230|aelig);/{\\ae}/g;
    $result =~ s/&(\#231|ccedil);/\\c{c}/g;
    $result =~ s/&(\#232|egrave);/\\\`{e}/g;
    $result =~ s/&(\#233|eacute);/\\\'{e}/g;
    $result =~ s/&(\#234|ecirc);/\\^{e}/g;
    $result =~ s/&(\#235|euml);/\\\"{e}/g;
    $result =~ s/&(\#236|igrave);/\\\`{i}/g;
    $result =~ s/&(\#237|iacute);/\\\'{i}/g;
    $result =~ s/&(\#238|icirc);/\\^{i}/g;
    $result =~ s/&(\#239|iuml);/\\\"{i}/g;
    $result =~ s/&(\#240|eth);/\$\\partial\$/g;
    $result =~ s/&(\#241|ntilde);/\\~{n}/g;
    $result =~ s/&(\#242|ograve);/\\\`{o}/g;
    $result =~ s/&(\#243|oacute);/\\\'{o}/g;
    $result =~ s/&(\#244|ocirc);/\\^{o}/g;
    $result =~ s/&(\#245|otilde);/\\~{o}/g;
    $result =~ s/&(\#246|ouml);/\\\"{o}/g;
    $result =~ s/&(\#247|divide);/\$\\div\$/g;
    $result =~ s/&(\#248|oslash);/{\\o}/g;
    $result =~ s/&(\#249|ugrave);/\\\`{u}/g; 
    $result =~ s/&(\#250|uacute);/\\\'{u}/g;
    $result =~ s/&(\#251|ucirc);/\\^{u}/g;
    $result =~ s/&(\#252|uuml);/\\\"{u}/g;
    $result =~ s/&(\#253|yacute);/\\\'{y}/g;
    $result =~ s/&(\#255|yuml);/\\\"{y}/g;
    $result =~ s/&\#952;/\$\\theta\$/g;
#Greek Alphabet
    $result =~ s/&(alpha|\#945);/\$\\alpha \$/g;
    $result =~ s/&(beta|\#946);/\$\\beta \$/g;
    $result =~ s/&(gamma|\#947);/\$\\gamma \$/g;
    $result =~ s/&(delta|\#948);/\$\\delta \$/g;
    $result =~ s/&(epsilon|\#949);/\$\\epsilon \$/g;
    $result =~ s/&(zeta|\#950);/\$\\zeta \$/g;
    $result =~ s/&(eta|\#951);/\$\\eta \$/g;
    $result =~ s/&(theta|\#952);/\$\\theta \$/g;
    $result =~ s/&(iota|\#953);/\$\\iota \$/g;
    $result =~ s/&(kappa|\#954);/\$\\kappa \$/g;
    $result =~ s/&(lambda|\#955);/\$\\lambda \$/g;
    $result =~ s/&(mu|\#956);/\$\\mu \$/g;
    $result =~ s/&(nu|\#957);/\$\\nu \$/g;
    $result =~ s/&(xi|\#958);/\$\\xi \$/g;
    $result =~ s/&(pi|\#960);/\$\\pi \$/g;
    $result =~ s/&(rho|\#961);/\$\\rho \$/g;
    $result =~ s/&(sigma|\#963);/\$\\sigma \$/g;
    $result =~ s/&(tau|\#964);/\$\\tau \$/g;
    $result =~ s/&(upsilon|\#965);/\$\\upsilon \$/g;
    $result =~ s/&(phi|\#966);/\$\\phi \$/g;
    $result =~ s/&(chi|\#967);/\$\\chi \$/g;
    $result =~ s/&(psi|\#968);/\$\\psi \$/g;
    $result =~ s/&(omega|\#969);/\$\\omega \$/g;
    $result =~ s/&(Gamma|\#915);/\$\\Gamma \$/g;
    $result =~ s/&(Delta|\#916);/\$\\Delta \$/g;
    $result =~ s/&(Theta|\#920);/\$\\Theta \$/g;
    $result =~ s/&(Lambda|\#923);/\$\\Lambda \$/g;
    $result =~ s/&(Xi|\#926);/\$\\Xi \$/g;
    $result =~ s/&(Pi|\#928);/\$\\Pi \$/g;
    $result =~ s/&(Sigma|\#931);/\$\\Sigma \$/g;
    $result =~ s/&(Upsilon|\#933);/\$\\Upsilon \$/g;
    $result =~ s/&(Phi|\#934);/\$\\Phi \$/g;
    $result =~ s/&(Psi|\#936);/\$\\Psi \$/g;
    $result =~ s/&(Omega|\#937);/\$\\Omega \$/g;
    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_new {
#
#Correspondence between $papersize variable and real paper format:
# 0 - "Letter [8 1/2x11 in]"
# 1 - "Legal [8 1/2x14 in]"
# 2 - "Ledger/Tabloid [11x17 in]"
# 3 - "Executive [7 1/2x10 in]"
# 4 - "A2 [420x594 mm]"
# 5 - "A3 [297x420 mm]"
# 6 - "A4 [210x297 mm]"
# 7 - "A5 [148x210 mm]"
# 8 - "A6 [105x148 mm]"
# 
    my ($papersize,$layout,$numberofcolumns) = @_; 
    my ($textwidth,$textheight,$oddoffset,$evenoffset) = (0,0,0,0);
    if ($papersize eq '0') {
	if ($layout eq 'book') {
	    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 'album') {
	    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 eq '1') {
#    } elsif($papersize eq '2') {
#    } elsif($papersize eq '3'/) {
    } elsif($papersize eq '6') {
	if ($layout eq 'book') {
	    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 'album') {
	    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 eq '5') {
#    } elsif($papersize eq '4') {
#    } elsif($papersize eq '7') {
#    } elsif($papersize eq '8') {
    }
    return $textwidth,$textheight,$oddoffset,$evenoffset;
}


sub get_name {
    my ($uname,$udom)=@_;
    if (!defined($uname)) { $uname=$ENV{'user.name'}; }
    if (!defined($udom)) { $uname=$ENV{'user.domain'}; }
    my $plainname=&Apache::loncommon::plainname($uname,$udom);
    if ($plainname=~/^\s*$/) { $plainname=$uname; }
    return &Apache::lonxml::latex_special_symbols($plainname,undef,undef,
						  'header');
}

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 $name = &get_name();
    if ($name =~ /^\s*$/) {
	$name=&Apache::lonxml::latex_special_symbols($ENV{'user.name'},undef,
						     undef,'header');
    }
    my $courseidinfo = &Apache::lonxml::latex_special_symbols(&Apache::lonnet::unescape($ENV{'course.'.$ENV{'request.course.id'}.'.description'}),'','','header');
    if ($layout eq 'CBI') {
	    $text =~ s/\\begin{document}/\\setlength{\\oddsidemargin}{$oddoffset}\\setlength{\\evensidemargin}{$evenoffset}\\setlength{\\topmargin}{200pt}\\setlength{\\textwidth}{$textwidth}\\setlength{\\textheight}{$textheight}\\setlength{\\parindent}{20pt}\\setlength{\\marginparwidth}{90pt}\\setlength{\\textfloatsep}{8pt plus 2\.0pt minus 4\.0pt}\\newlength{\\minipagewidth}\\setlength{\\minipagewidth}{\\textwidth\/\$number_of_columns-0\.2cm} \\begin{document}\\setcounter{page}{1}\\noindent\\parbox{\\minipagewidth}{\\noindent\\fbox{\\textbf{$name}} \\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= $textwidth\\newlength{\\minipagewidth}\\setlength{\\minipagewidth}{\\textwidth\/\$number_of_columns-0\.2cm}\\renewcommand{\\ref}{\\keephidden\}\\usepackage{fancyhdr}\\pagestyle{fancy}\\rhead{}\\chead{}\\lhead{\\textbf{$name} - $courseidinfo \\hfill \\thepage \\\\ \\textit{$assignment}}\\begin{document}\\voffset=-0\.8 cm\\setcounter{page}{1}/;
	} else {
	    $text =~ s/\\pagestyle{fancy}\\rhead{}\\chead{}\s*\\begin{document}/\\textheight $textheight\\oddsidemargin = $evenoffset\\evensidemargin = $evenoffset\\textwidth= $textwidth\\newlength{\\minipagewidth}\\setlength{\\minipagewidth}{\\textwidth\/\$number_of_columns-0\.2cm}\\renewcommand{\\ref}{\\keephidden\}\\pagestyle{fancy}\\rhead{}\\chead{}\\begin{document}\\voffset=-0\.8cm\\setcounter{page}{1}  \\vskip 5 mm /;

	}
    }
    return $text;
}


sub page_format_transformation_new {
    my ($papersize,$layout,$numberofcolumns,$choice,$text,$assignment) = @_; 
    my ($textwidth,$textheight,$oddoffset,$evenoffset);
	$assignment=~s/_/ /g;
        if ($numberofcolumns != 1) {
          ($textwidth,$textheight,$oddoffset,$evenoffset) = &page_format_new($papersize,$layout,$numberofcolumns);
	} else {
	  ($textwidth,$textheight,$oddoffset,$evenoffset) = ($ENV{'form.width'},$ENV{'form.height'},$ENV{'form.leftmargin'},$ENV{'form.leftmargin'});
	}
    my $name = &get_name();
    if ($name =~ /^\s*$/) {
	$name=&Apache::lonxml::latex_special_symbols($ENV{'user.name'},undef,
						     undef,'header');
    }
    my $courseidinfo = &Apache::lonxml::latex_special_symbols(&Apache::lonnet::unescape($ENV{'course.'.$ENV{'request.course.id'}.'.description'}),'','','header');
    if ($layout eq 'album') {
	    $text =~ s/\\begin{document}/\\setlength{\\oddsidemargin}{$oddoffset}\\setlength{\\evensidemargin}{$evenoffset}\\setlength{\\topmargin}{200pt}\\setlength{\\textwidth}{$textwidth}\\setlength{\\textheight}{$textheight}\\setlength{\\parindent}{20pt}\\setlength{\\marginparwidth}{90pt}\\setlength{\\textfloatsep}{8pt plus 2\.0pt minus 4\.0pt}\\newlength{\\minipagewidth}\\setlength{\\minipagewidth}{\\textwidth\/\$number_of_columns-0\.2cm} \\begin{document}\\setcounter{page}{1}\\noindent\\parbox{\\minipagewidth}{\\noindent\\fbox{\\textbf{$name}} \\hfill  $courseidinfo} \\vskip 5 mm /;
    } elsif ($layout eq 'book') {
	if ($choice ne 'All class print') { 
		$text =~ s/\\begin{document}/\\textheight $textheight\\oddsidemargin = $evenoffset\\evensidemargin = $evenoffset\\textwidth= $textwidth\\newlength{\\minipagewidth}\\setlength{\\minipagewidth}{\\textwidth\/\$number_of_columns-0\.2cm}\\renewcommand{\\ref}{\\keephidden\}\\usepackage{fancyhdr}\\pagestyle{fancy}\\rhead{}\\chead{}\\lhead{\\textbf{$name} - $courseidinfo \\hfill \\thepage \\\\ \\textit{$assignment}}\\begin{document}\\voffset=-0\.8 cm\\setcounter{page}{1}/;
	} else {
	    $text =~ s/\\pagestyle{fancy}\\rhead{}\\chead{}\s*\\begin{document}/\\textheight $textheight\\oddsidemargin = $evenoffset\\evensidemargin = $evenoffset\\textwidth= $textwidth\\newlength{\\minipagewidth}\\setlength{\\minipagewidth}{\\textwidth\/\$number_of_columns-0\.2cm}\\renewcommand{\\ref}{\\keephidden\}\\pagestyle{fancy}\\rhead{}\\chead{}\\begin{document}\\voffset=-0\.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);
    $map=&Apache::lonnet::clutter($map);
    my $name_of_sequence;
    $name_of_sequence = $hash{'title_'.$hash{'ids_'.$map}};
    if ($name_of_sequence =~ /^\s*$/) {
	$map =~ m|([^/]+)$|;
	$name_of_sequence = $1;
    }
    my $name_of_map = $hash{'title_'.$hash{'ids_'.&Apache::lonnet::clutter($ENV{'request.course.uri'})}};
    if ($name_of_map =~ /^\s*$/) {
	$ENV{'request.course.uri'} =~ m|([^/]+)$|;
	$name_of_map = $1;
    }
    return ($name_of_resourse,$name_of_sequence,$name_of_map);

}


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

    my $format_from_helper = $helper->{'VARS'}->{'FORMAT'};
    my ($result,$selectionmade) = ('','');
    my $number_of_columns = 1; #used only for pages to determine the width of the cell
    my @temporary_array=split /\|/,$format_from_helper;
    my ($laystyle,$numberofcolumns,$papersize)=@temporary_array;
    if ($laystyle eq 'L') {
	$laystyle='album';
    } else {
	$laystyle='book';
    }
    my ($textwidth,$textheight,$oddoffset,$evenoffset) = &page_format_new($papersize,$laystyle,$numberofcolumns);
    my $assignment =  $ENV{'form.assignment'};
    my $LaTeXwidth; 
    if ($textwidth=~/(\d+)\s*cm/) {
	$LaTeXwidth = $1*10;
    } elsif ($textwidth=~/(\d+)\s*mm/) {
	$LaTeXwidth = $1;
    } elsif ($textwidth=~/(\d+)\s*in/) {
	$LaTeXwidth = $1*25.4;
    }
    $LaTeXwidth.=' mm';
    
    if ($helper->{'VARS'}->{'PRINT_TYPE'} eq 'current_document') {
      #-- single document - problem, page, html, xml, ...
	my $currentURL;
	if ($helper->{'VARS'}->{'construction'} ne '1') {
            #prins published resource
	    $currentURL=$helper->{'VARS'}->{'postdata'};
	} else {
            #prins resource from the construction space
	    $currentURL=$helper->{'VARS'}->{'filename'};
	    $currentURL=~s/\/home\//\/~/;
	    $currentURL=~s/public_html\///;
	}
	$selectionmade = 1;
	if ($currentURL=~/\.(problem|exam|quiz|assess|survey|form|library|page|xml|html|htm|xhtml|xhtm)$/) {
	    my %moreenv;
	    $moreenv{'request.filename'}=$currentURL;
	    my %form;
	    $form{'grade_target'}='tex';
	    $form{'textwidth'}=$LaTeXwidth;
	    my $rndseed=time;
	    $form{'rndseed'}=$rndseed;
	    &Apache::lonnet::appenv(%moreenv);
	    my $texversion=&Apache::lonnet::ssi($currentURL,%form);
	    &Apache::lonnet::delenv('form.counter');
	    &Apache::lonnet::delenv('request.filename');
	    if($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'no') {
		my %form;
		$form{'grade_target'}='answer';
		$form{'answer_output_mode'}='tex';
		$form{'rndseed'}=$rndseed;
		my $answer=&Apache::lonnet::ssi($currentURL,%form);
#		$r->print('<pre>'.$answer.'</pre>'); return OK;
		$texversion=~s/(\\end{document})/$answer$1/;
	    }
	    $result .= $texversion;
	    if ($currentURL=~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'};
#	  }
#	  $result.=' \end{document}'
	}
    } elsif (($helper->{'VARS'}->{'PRINT_TYPE'} eq 'map_problems') or
             ($helper->{'VARS'}->{'PRINT_TYPE'} eq 'map_problems_pages') or
             ($helper->{'VARS'}->{'PRINT_TYPE'} eq 'all_problems')) { 
        #-- produce an output string
	my $flag_latex_header_remove = 'NO';
	my $flag_page_in_sequence = 'NO';
	my @master_seq=split /\|\|\|/, $helper->{'VARS'}->{'RESOURCES'};
	for (my $i=0;$i<=$#master_seq;$i++) {
	    $master_seq[$i]=~/___\d+___(.*)$/;
	    my $urlp='/res/'.$1;
	    if ($helper->{'VARS'}->{'PRINT_TYPE'} eq 'map_problems') {
		$selectionmade = 2;
	    } elsif ($helper->{'VARS'}->{'PRINT_TYPE'} eq 'map_problems_pages') {
		$selectionmade = 3;
	    } elsif ($helper->{'VARS'}->{'PRINT_TYPE'} eq 'all_problems') {
		$selectionmade = 4;
	    }
	    my %form;
	    $form{'grade_target'}='tex';
	    $form{'textwidth'}=$LaTeXwidth;
	    $form{'symb'}=$master_seq[$i];
	    #&Apache::lonnet::logthis("Trying to get $urlp with symb $master_seq[$i]");
	    my $texversion=&Apache::lonnet::ssi($urlp,%form);
	    if ($urlp=~/\.page$/) {
		($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}/;}	
	$result .= '\end{document}';
     } elsif ($helper->{'VARS'}->{'PRINT_TYPE'} eq 'problems_for_students') { 
     #-- prints assignments for whole class or for selected students  
	 $selectionmade=5;
	 my @students=split /\|\|\|/, $helper->{'VARS'}->{'STUDENTS'};
	 my @master_seq=split /\|\|\|/, $helper->{'VARS'}->{'RESOURCES'};
	 #loop over students
	 my $flag_latex_header_remove = 'NO'; 
	 my %moreenv;
	 $moreenv{'form.textwidth'}=$LaTeXwidth;
	 &Apache::lonnet::appenv(%moreenv);
	 my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,'Print Status','Class Print Status',$#students+1);
	 foreach my $person (@students) {
	    my $current_output = ''; 
#	    my ($usersection,$username,$userdomain) = split /:/,$person;
	    my ($username,$userdomain) = split /:/,$person;
	    my $fullname = &get_name($username,$userdomain);
            #goes through all resources, checks if they are available for current student, and produces output   
	    foreach my $curresline (@master_seq)  {
		if ($curresline=~ m/\.(problem|exam|quiz|assess|survey|form|library)$/) {
		    my ($map,$id,$res_url) = split(/___/,$curresline);
		    if (&Apache::lonnet::allowed('bre',$res_url)) {
			my $rendered = &Apache::loncommon::get_student_view($curresline,$username,$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';
		}
	    }
	    my $courseidinfo = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
	    if ($current_output=~/\\documentclass/) {
		$current_output =~ s/\\begin{document}/\\setlength{\\topmargin}{1cm}\\usepackage{fancyhdr}\\pagestyle{fancy}\\rhead{}\\chead{} \\begin{document}\\noindent\\lhead{\\textit{\\textbf{$fullname}} - $courseidinfo \\hfill \\thepage \\\\ \\textit{$assignment}}\\vskip 3 mm /;
	    } else {
		my $blanspages = '';
		for (my $j=0;$j<$helper->{'VARS'}->{'EMPTY_PAGES'};$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 }\\newpage \\vskip 3mm'.$blanspages.'\setcounter{page}{1}\noindent\parbox{\minipagewidth}{\noindent\\lhead{\\textit{\\textbf{'.$fullname.'}} - '.$courseidinfo.' \\hfill \\thepage \\\\ \\textit{'.$assignment.'}}\hskip 1.4in } \vskip 5 mm '.$current_output;
	    }
	    $result .= $current_output;
	    &Apache::lonnet::delenv('form.counter');	    
	    &Apache::lonxml::init_counter(); 
	    &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
						    'last student '.$fullname);
	}
	&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
	$result .= '\end{document}';
	&Apache::lonnet::delenv('form.textwidth');
    } elsif ($helper->{'VARS'}->{'PRINT_TYPE'} eq 'problems_from_directory') {      
    #prints selected problems from the subdirectory 
	$selectionmade = 6;
        my @list_of_files=split /\|\|\|/, $helper->{'VARS'}->{'FILES'};
	@list_of_files=sort @list_of_files;
	my $flag_latex_header_remove = 'NO';  
	for (my $i=0;$i<=$#list_of_files;$i++) {
	    my $urlp = $list_of_files[$i];
	    if ($urlp=~/\//) {
		my %form;
		$form{'grade_target'}='tex';
		$form{'textwidth'}=$LaTeXwidth;
		if ($urlp =~ m|/home/([^/]+)/public_html|) {
		    $urlp =~ s|/home/([^/]*)/public_html|/~$1|;
		} else {
		    $urlp =~ s|^/home/httpd/html||;
		}
		my $texversion=&Apache::lonnet::ssi($urlp,%form);
                #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
    $result = &page_format_transformation_new($papersize,$laystyle,$numberofcolumns,$helper->{'VARS'}->{'PRINT_TYPE'},$result,$helper->{VARS}->{'assignment'});
#    if ($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;

#<meta http-equiv="Refresh" content="0; url=/cgi-bin/printout.pl?$filename&$laystyle&$numberofcolumns&$selectionmade">
$r->print(<<FINALEND);
<meta http-equiv="Refresh" content="0; url=/cgi-bin/printout.pl?$filename&$laystyle&$numberofcolumns&$selectionmade">
</body>
</html>
FINALEND
}



sub handler {

    my $r = shift;
    my $helper;

    # A hook for me to work without disturbing Alex.
    if (!$ENV{'form.jeremy'}) {
        my $result = printHelper($r);
        if (!ref($result)) {
            return $result;
        }
        $helper = $result;
	
	

	my $key; 
	foreach $key (keys %{$helper->{'VARS'}}) {
	    $r->print(' '.$key.'->'.$helper->{'VARS'}->{$key}.'<-<br />');
	}
#	return OK;
	
	
	&output_data_new($r,$helper);






    return OK;
    }
#    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;
   
} 

use Apache::lonhelper;

sub printHelper {
    my $r = shift;

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

    if ($r->header_only) {
        if ($ENV{'browser.mathml'}) {
            $r->content_type('text/xml');
        } else {
            $r->content_type('text/html');
        }
        $r->send_http_header;
        return OK;
    }

    # Send header, nocache
    if ($ENV{'browser.mathml'}) {
        $r->content_type('text/xml');
    } else {
        $r->content_type('text/html');
    }
    &Apache::loncommon::no_cache($r);
    $r->send_http_header;
    $r->rflush();

    # Unfortunately, this helper is so complicated we have to
    # write it by hand

    Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
    
    my $helper = Apache::lonhelper::helper->new("Printing Wizard");
    $helper->declareVar('symb');
    $helper->declareVar('postdata');    
    $helper->declareVar('filename');
    $helper->declareVar('construction');
    
    # This will persistently load in the data we want from the
    # very first screen.
    # Detect whether we're coming from construction space
    if ($ENV{'form.postdata'} =~ /http:\/\// ) {
        $ENV{'form.postdata'} =~ /http:\/\/[a-zA-Z.]+\/~([a-zA-Z0-9]+)\/(.*)/;
        $helper->{VARS}->{'filename'} = "/home/$1/public_html/$2";
        $helper->{VARS}->{'construction'} = 1;
    } else {
        if ($ENV{'form.postdata'}) {
            $helper->{VARS}->{'symb'} = &Apache::lonnet::symbread($ENV{'form.postdata'});
        }
        if ($ENV{'form.symb'}) {
            $helper->{VARS}->{'symb'} = $ENV{'form.symb'};
        }
        if ($ENV{'form.url'}) {
            $helper->{VARS}->{'symb'} = &Apache::lonnet::symbread($helper->{VARS}->{'postdata'});
        }
    }

    if ($ENV{'form.symb'}) {
        $helper->{VARS}->{'symb'} = $ENV{'form.symb'};
    }
    if ($ENV{'form.url'}) {
        $helper->{VARS}->{'symb'} = &Apache::lonnet::symbread($helper->{VARS}->{'postdata'});

    }
    
    my ($resourceTitle,$sequenceTitle,$mapTitle) = &details_for_menu;
    $helper->{VARS}->{'assignment'} = $sequenceTitle;

    
    # Extract map
    my $symb = $helper->{VARS}->{'symb'};
    my ($map, $id, $url);
    my $subdir;

    # Get the resource name from construction space
    if ($helper->{VARS}->{'construction'}) {
        $resourceTitle = substr($helper->{VARS}->{'filename'}, 
                                rindex($helper->{VARS}->{'filename'}, '/')+1);
        $subdir = substr($helper->{VARS}->{'filename'},
                         0, rindex($helper->{VARS}->{'filename'}, '/') + 1);
    } else {
        ($map, $id, $url) = split(/___/, $symb);
        $helper->{VARS}->{'postdata'} = Apache::lonnet::clutter($url);

        if (!$resourceTitle) { # if the resource doesn't have a title, use the filename
            my $url = $helper->{VARS}->{'postdata'};
            $resourceTitle = substr($url, rindex($url, '/') + 1);
        }
        $subdir = &Apache::lonnet::filelocation("", $url);
    }

    Apache::lonhelper::registerHelperTags();

    # "Delete everything after the last slash."
    $subdir =~ s|/[^/]+$||;
    if (not $helper->{VARS}->{'construction'}) {
	$subdir='/home/httpd/html/res/'.$subdir;
    }


    # What can be printed is a very dynamic decision based on
    # lots of factors. So we need to dynamically build this list.
    # To prevent security leaks, states are only added to the wizard
    # if they can be reached, which ensures manipulating the form input
    # won't allow anyone to reach states they shouldn't have permission
    # to reach.

    # printChoices is tracking the kind of printing the user can
    # do, and will be used in a choices construction later.
    # In the meantime we will be adding states and elements to
    # the helper by hand.
    my $printChoices = [];
    my $paramHash;

    if ($resourceTitle) {
        push @{$printChoices}, ["<b>$resourceTitle</b> (prints what you just saw on the screen)", 'current_document', 'PAGESIZE'];
    }

    $r->print($helper->{VARS}->{'postdata'});

    # If we're in a sequence...
    if ($helper->{'VARS'}->{'construction'} ne '1') {
        # Allow problems from sequence
        push @{$printChoices}, ["Problem(s) from <b>$sequenceTitle</b>", 'map_problems', 'CHOOSE_PROBLEMS'];
        # Allow all resources from sequence
        push @{$printChoices}, ["Everything (problem(s), page(s), html/xml file(s)) from <b>$sequenceTitle</b>", 'map_problems_pages', 'CHOOSE_PROBLEMS_HTML'];

        my $isProblem = '$res->is_problem();';
        my $isProblemOrMap = '$res->is_problem() || $res->is_map()';
        my $isNotMap = '!$res->is_map();';
        my $symb = '$res->symb();';
        my $helperFragment = <<HELPERFRAGMENT;
  <state name="CHOOSE_PROBLEMS" title="Select Problem(s) to print">
    <message>(mark them then click "next" button) <br /></message>
    <resource variable="RESOURCES" multichoice="1" toponly='1'>
      <nextstate>PAGESIZE</nextstate>
      <filterfunc>return $isProblem</filterfunc>
      <mapurl>$map</mapurl>
      <valuefunc>return $symb</valuefunc>
      </resource>
    </state>

  <state name="CHOOSE_PROBLEMS_HTML" title="Select Resource(s) to print">
    <message>(mark them then click "next" button) <br /></message>
    <resource variable="RESOURCES" multichoice="1" toponly='1'>
      <nextstate>PAGESIZE</nextstate>
      <filterfunc>return $isNotMap;</filterfunc>
      <mapurl>$map</mapurl>
      <valuefunc>return $symb</valuefunc>
      </resource>
    </state>
HELPERFRAGMENT

        &Apache::lonxml::xmlparse($r, 'helper', $helperFragment); 
    }

    # If the user is priviledged, allow them to print all 
    # problems in the course, optionally for selected students
    if (($ENV{'request.role'}=~m/^cc\./ or $ENV{'request.role'}=~m/^in\./ or $ENV{'request.role'}=~m/^ta\./) and ($helper->{VARS}->{'postdata'}=~/\/res\//)) { 
        push @{$printChoices}, ['<b>Problems</b> in this course', 'all_problems', 'ALL_PROBLEMS'];
        push @{$printChoices}, ["Problems from <b>$sequenceTitle</b> for selected students", 'problems_for_students', 'CHOOSE_STUDENTS'];

        my $isProblem = '$res->is_problem();';
        my $isProblemOrMap = '$res->is_problem() || $res->is_map()';
        my $symb = '$res->symb();';
        &Apache::lonxml::xmlparse($r, 'helper', <<CHOOSE_STUDENTS);
  <state name="ALL_PROBLEMS" title="Select Problem(s) to print">
    <message>(mark them then click "next" button) <br /></message>
    <resource variable="RESOURCES" multichoice="1">
      <nextstate>PAGESIZE</nextstate>
      <filterfunc>return $isProblemOrMap</filterfunc>
      <choicefunc>return $isProblem</choicefunc>
      <valuefunc>return $symb</valuefunc>
      </resource>
    </state>

  <state name="CHOOSE_STUDENTS" title="Choose Students whose assignments you want to print">
    <message>(do not forget to select assignment itself - make another selection below) <br /></message>
    <student multichoice='1' variable="STUDENTS" nextstate="PAGESIZE" />
    <message><br /><big><i><b>Select resources for the assignment</b></i></big><br /></message>
    <resource variable="RESOURCES" multichoice="1">
      <filterfunc>return $isProblem</filterfunc>
      <mapurl>$map</mapurl>
      <valuefunc>return $symb</valuefunc>
      </resource>
    <message><br /><big><i><b>How should the results be printed?</b></i></big><br /></message>
    <choices variable="EMPTY_PAGES">
      <choice computer='0'>Print students assignments without separations (as uniform flow)</choice>
      <choice computer='1'>Start student assignment from new page (add pagefeed after each student)</choice>
      <choice computer='2'>Add one emty page after each student assignment</choice> 
      <choice computer='3'>Add two emty page after each student assignment</choice> 
      </choices>
    </state>
CHOOSE_STUDENTS
    }

    # FIXME: That RE should come from a library somewhere.
    if (((&Apache::lonnet::allowed('bre',$subdir) eq 'F') and ($helper->{VARS}->{'postdata'}=~/\.(problem|exam|quiz|assess|survey|form|library|page|xml|html|htm|xhtml|xhtm)/)) or defined $helper->{'VARS'}->{'construction'}) {    
        push @{$printChoices}, ["Problems from current subdirectory <b>$subdir</b>", 'problems_from_directory', 'CHOOSE_FROM_SUBDIR'];
        
        my $f = '$filename';
        my $xmlfrag = <<CHOOSE_FROM_SUBDIR;
  <state name="CHOOSE_FROM_SUBDIR" title="Select File(s) from <b><small>$subdir</small></b> to print">
    <message>(mark them then click "next" button) <br /></message>
    <files variable="FILES" multichoice='1'>
      <nextstate>PAGESIZE</nextstate>
      <filechoice>return '$subdir';</filechoice>
CHOOSE_FROM_SUBDIR
        
        $xmlfrag .= <<'CHOOSE_FROM_SUBDIR';
      <filefilter>return $filename =~ 
           m/^[^\.]+\.(problem|exam|quiz|assess|survey|form|library)$/;
      </filefilter>
      </files>
    </state>
CHOOSE_FROM_SUBDIR
        &Apache::lonxml::xmlparse($r, 'helper', $xmlfrag);
    }

    # Generate the first state, to select which resources get printed.
    Apache::lonhelper::state->new("START", "What do you want to print? Make a choice.");
    $paramHash = Apache::lonhelper::getParamHash();
    $paramHash->{MESSAGE_TEXT} = "";
    Apache::lonhelper::message->new();
    $paramHash = Apache::lonhelper::getParamHash();
    $paramHash->{'variable'} = 'PRINT_TYPE';
    $helper->declareVar('PRINT_TYPE');
    $paramHash->{CHOICES} = $printChoices;
    Apache::lonhelper::choices->new();

    if ($ENV{'request.role.adv'}) {
        $paramHash = Apache::lonhelper::getParamHash();
        $paramHash->{MESSAGE_TEXT} = "<br /><big><b><i>Next option is available only for advanced users:</i></b></big><br />";
        Apache::lonhelper::message->new();
        $paramHash = Apache::lonhelper::getParamHash();
	$paramHash->{'variable'} = 'ANSWER_TYPE';   
	$helper->declareVar('ANSWER_TYPE');         
        $paramHash->{CHOICES} = [
                                   ['Print without answer', 'yes'],
                                   ['Print with answers', 'no'] ];
        Apache::lonhelper::choices->new();
    }

    Apache::lonprintout::page_format_state->new("FORMAT");

    # Generate the PAGESIZE state which will offer the user the margin
    # choices if they select one column
    Apache::lonhelper::state->new("PAGESIZE", "Set Margins");
    Apache::lonprintout::page_size_state->new('pagesize', 'FORMAT', 'FINAL');


    $helper->process();

    # MANUAL BAILOUT CONDITION:
    # If we're in the "final" state, bailout and return to handler
    if ($helper->{STATE} eq 'FINAL') {
        return $helper;
    }    

    $r->print($helper->display());

    Apache::lonhelper::unregisterHelperTags();

    untie %hash;

    return OK;
}


1;

package Apache::lonprintout::page_format_state;

=pod

=head1 Helper element: page_format_state

See lonhelper.pm documentation for discussion of the helper framework.

Apache::lonprintout::page_format_state is an element that gives the 
user an opportunity to select the page layout they wish to print 
with: Number of columns, portrait/landscape, and paper size. If you 
want to change the paper size choices, change the @paperSize array 
contents in this package.

page_format_state is always directly invoked in lonprintout.pm, so there
is no tag interface. You actually pass parameters to the constructor.

=over 4

=item * B<new>(varName): varName is where the print information will be stored in the format FIXME.

=back

=cut

use Apache::lonhelper;

no strict;
@ISA = ("Apache::lonhelper::element");
use strict;

my $maxColumns = 2;
my @paperSize = ("Letter [8 1/2x11 in]", "Legal [8 1/2x14 in]", 
                 "Ledger/Tabloid [11x17 in]", "Executive [7 1/2x10 in]",
                 "A2 [420x594 mm]", "A3 [297x420 mm]", "A4 [210x297 mm]", 
                 "A5 [148x210 mm]", "A6 [105x148 mm]" );

# Tentative format: Orientation (L = Landscape, P = portrait) | Colnum |
#                   Paper type

sub new { 
    my $self = Apache::lonhelper::element->new();

    shift;

    $self->{'variable'} = shift;
    my $helper = Apache::lonhelper::getHelper();
    $helper->declareVar($self->{'variable'});
    bless($self);
    return $self;
}

sub render {
    my $self = shift;
    my $helper = Apache::lonhelper::getHelper();
    my $result = '';
    my $var = $self->{'variable'};

    $result .= <<STATEHTML;

<p><big><i><b>What page format do you prefer?</b></i></big></p>
<table cellpadding="3">
  <tr>
    <td align="center"><b>Page layout</b></td>
    <td align="center"><b>Number of columns</b></td>
    <td align="center"><b>Paper type</b></td>
  </tr>
  <tr>
    <td>
      <input type="radio" name="${var}.layout" value="L" /> Landscape<br />
      <input type="radio" name="${var}.layout" value="P" checked='1'  /> Portrait
    </td>
    <td align="center">
      <select name="${var}.cols">
STATEHTML

    my $i;
    for ($i = 1; $i <= $maxColumns; $i++) {
        if ($i == 2) {
            $result .= "<option value='$i' selected>$i</option>\n";
        } else {
            $result .= "<option value='$i'>$i</option>\n";
        }
    }

    $result .= "</select></td><td>\n";
    $result .= "<select name='${var}.paper'>\n";

    $i = 0;
    foreach (@paperSize) {
        if ($i == 0) {
            $result .= "<option selected value='$i'>" . $paperSize[$i] . "</option>\n";
        } else {
            $result .= "<option value='$i'>" . $paperSize[$i] . "</option>\n";
        }
        $i++;
    }

    $result .= "</select></td></tr></table>";
    return $result;
}

sub postprocess {
    my $self = shift;

    my $var = $self->{'variable'};
    my $helper = Apache::lonhelper->getHelper();
    $helper->{VARS}->{$var} = 
        $ENV{"form.$var.layout"} . '|' . $ENV{"form.$var.cols"} . '|' .
        $ENV{"form.$var.paper"};
    return 1;
}

1;

package Apache::lonprintout::page_size_state;

=pod

=head1 Helper element: page_size_state

See lonhelper.pm documentation for discussion of the helper framework.

Apache::lonprintout::page_size_state is an element that gives the 
user the opportunity to further refine the page settings if they
select a single-column page.

page_size_state is always directly invoked in lonprintout.pm, so there
is no tag interface. You actually pass parameters to the constructor.

=over 4

=item * B<new>(varName): varName is where the print information will be stored in the format FIXME.

=back

=cut

use Apache::lonhelper;

no strict;
@ISA = ("Apache::lonhelper::element");
use strict;



sub new { 
    my $self = Apache::lonhelper::element->new();

    shift; # disturbs me (probably prevents subclassing) but works (drops
           # package descriptor)... - Jeremy

    $self->{'variable'} = shift;
    my $helper = Apache::lonhelper::getHelper();
    $helper->declareVar($self->{'variable'});

    # The variable name of the format element, so we can look into 
    # $helper->{VARS} to figure out whether the columns are one or two
    $self->{'formatvar'} = shift;

    # The state to transition to after selection, or after discovering
    # the cols are not set to 1
    $self->{NEXTSTATE} = shift;
    bless($self);
    return $self;
}

sub render {
    my $self = shift;
    my $helper = Apache::lonhelper::getHelper();
    my $result = '';
    my $var = $self->{'variable'};

    if (defined $self->{ERROR_MSG}) {
        $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />';
    }

    $result .= <<ELEMENTHTML;

<p>How should the column be formatted?</p>

<table cellpadding='3'>
  <tr>
    <td align='right'><b>Width</b>:</td>
    <td align='left'><input type='text' name='$var.width' value='18' size='4'></td>
    <td align='left'>
      <select name='$var.widthunit'>
        <option>cm</option><option>in</option>
      </select>
    </td>
  </tr>
  <tr>
    <td align='right'><b>Height</b>:</td>
    <td align='left'><input type='text' name="$var.height" value="25.9" size='4'></td>
    <td align='left'>
      <select name='$var.heightunit'>
        <option>cm</option><option>in</option>
      </select>
    </td>
  </tr>
  <tr>
    <td align='right'><b>Left margin</b>:</td>
    <td align='left'><input type='text' name='$var.lmargin' value='-1.5' size='4'></td>
    <td align='left'>
      <select name='$var.heightunit'>
        <option>cm</option><option>in</option>
      </select>
    </td>
  </tr>
</table>

<p>Hint: Some instructors like to leave scratch space for the student by
making the width much smaller then the width of the page.</p>

ELEMENTHTML

    return $result;
}

# If the user didn't select 1 column, skip this state.
sub preprocess {
    my $self = shift;
    my $helper = Apache::lonhelper::getHelper();

    my $format = $helper->{VARS}->{$self->{'formatvar'}};
    if (substr($format, 2, 1) ne '1') {
        $helper->changeState($self->{NEXTSTATE});
    }
   
    return 1;
}

sub postprocess {
    my $self = shift;

    my $var = $self->{'variable'};
    my $helper = Apache::lonhelper->getHelper();
    my $width = $helper->{VARS}->{$var .'.width'} = $ENV{"form.${var}.width"}; 
    my $height = $helper->{VARS}->{$var .'.height'} = $ENV{"form.${var}.height"}; 
    my $lmargin = $helper->{VARS}->{$var .'.lmargin'} = $ENV{"form.${var}.lmargin"}; 
    $helper->{VARS}->{$var .'.widthunit'} = $ENV{"form.${var}.widthunit"}; 
    $helper->{VARS}->{$var .'.heightunit'} = $ENV{"form.${var}.heightunit"}; 
    $helper->{VARS}->{$var .'.lmarginunit'} = $ENV{"form.${var}.lmarginunit"}; 

    my $error = '';

    # /^-?[0-9]+(\.[0-9]*)?$/ -> optional minus, at least on digit, followed 
    # by an optional period, followed by digits, ending the string

    if ($width !~  /^-?[0-9]+(\.[0-9]*)?$/) {
        $error .= "Invalid width; please type only a number.<br />\n";
    }
    if ($height !~  /^-?[0-9]+(\.[0-9]*)?$/) {
        $error .= "Invalid height; please type only a number.<br />\n";
    }
    if ($lmargin !~  /^-?[0-9]+(\.[0-9]*)?$/) {
        $error .= "Invalid left margin; please type only a number.<br />\n";
    }

    if (!$error) {
        Apache::lonhelper::getHelper()->changeState($self->{NEXTSTATE});
        return 1;
    } else {
        $self->{ERROR_MSG} = $error;
        return 0;
    }
}



__END__


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