Annotation of loncom/interface/printout.pl, revision 1.111

1.1       sakharuk    1: #!/usr/bin/perl
1.37      albertel    2: # CGI-script to run LaTeX, dvips, ps2ps, ps2pdf etc.
                      3: #
                      4: #
                      5: # Copyright Michigan State University Board of Trustees
                      6: #
                      7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      8: #
                      9: # LON-CAPA is free software; you can redistribute it and/or modify
                     10: # it under the terms of the GNU General Public License as published by
                     11: # the Free Software Foundation; either version 2 of the License, or
                     12: # (at your option) any later version.
                     13: #
                     14: # LON-CAPA is distributed in the hope that it will be useful,
                     15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     17: # GNU General Public License for more details.
                     18: #
                     19: # You should have received a copy of the GNU General Public License
                     20: # along with LON-CAPA; if not, write to the Free Software
                     21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     22: #
                     23: # /home/httpd/html/adm/gpl.txt
                     24: #
                     25: # http://www.lon-capa.org/
                     26: #
                     27: 
1.39      sakharuk   28: use lib '/home/httpd/lib/perl';
1.76      albertel   29: use LONCAPA::loncgi;
1.38      sakharuk   30: use File::Path;
1.88      foxr       31: use File::Basename;
1.111   ! foxr       32: use File::Copy;
1.6       sakharuk   33: use IO::File;
1.7       sakharuk   34: use Image::Magick;
1.97      albertel   35: use Apache::lonhtmlcommon();
1.80      albertel   36: use Apache::lonnet;
1.97      albertel   37: use Apache::loncommon();
1.51      albertel   38: use Apache::lonlocal;
1.97      albertel   39: use Apache::lonmsg();
1.77      foxr       40: use LONCAPA::Enrollment;
1.47      sakharuk   41: 
1.59      albertel   42: use strict;
1.77      foxr       43: 
1.81      foxr       44: 
1.77      foxr       45: #   Determine if a user is operating as a student for this course/domain.
                     46: #Parameters:
1.92      albertel   47: #    none
1.77      foxr       48: #Implicit:
                     49: #    $env{request.role} contains the role under which this user operated this
                     50: #                       this request.
                     51: sub is_student {
1.92      albertel   52:     return ($env{'request.role'}=~/^st\./);
1.77      foxr       53: }
                     54: 
                     55: #
                     56: #   Debugging:  Dump the environment for debugging.
                     57: #
                     58: sub dumpenv  {
1.84      albertel   59:     print "<br />-------------------<br />";
1.77      foxr       60:     foreach my $key (sort (keys %env)) {
1.84      albertel   61: 	print "<br />$key -> $env{$key}";
1.77      foxr       62:     }
1.84      albertel   63:     print "<br />-------------------<br />";
1.77      foxr       64: }
                     65: 
                     66: #
                     67: #   This sub sends a message to the appropriate person if there was an error
                     68: #   rendering the latex  At present, there's only one case to consider:
                     69: #   a student printing inside a course results in messages to the course coordinator.
                     70: #Parmaeters:
                     71: #    identifier -  The unique identifier of this cgi request.
1.81      foxr       72: #    badresource-  Filepath to most likely failing 
1.77      foxr       73: #    logfile    -  The contents of the log file (included in the message).
                     74: #    texfile    -  reference to an array containing the LaTeX input file
                     75: #                  (included in the message).
                     76: #Implicit inputs:
                     77: #   From the environment:
                     78: #       cgi.$identifier.user     - User doing the printing.
                     79: #       cgi.$identifier.domain   - Domain the user is logged in on with printing.
                     80: #       cgi.$identifier.courseid - Id of the course (if this is a course).
                     81: #       cgi.$identifier.coursedom- Domain in which course was constituted.
                     82: #       cgi.$identifier.resources - List of resource URL's for which the print
                     83: #                                  was attempted.
                     84: # 
                     85: sub send_error_mail {
1.81      foxr       86:     my ($identifier, $badresource, $logfile, $texfile) = @_;
1.77      foxr       87:     my $user     = $env{"cgi.$identifier.user"};
                     88:     my $domain   = $env{"cgi.$identifier.domain"};
                     89:     my $courseid = $env{"cgi.$identifier.courseid"};
                     90:     my $coursedom= $env{"cgi.$identifier.coursedom"};
                     91:     my $resources= $env{"cgi.$identifier.resources"};
                     92: 
1.81      foxr       93:     #  resource file->URL
                     94:     #
                     95:     my $badurl = &Apache::lonnet::declutter($badresource);
                     96: 
                     97:     # &dumpenv();
1.77      foxr       98: 
                     99: 
                    100: 
                    101:     #  Only continue if there is a user, domain, courseid, course domain
                    102:     #  and resources:
                    103: 
                    104:     if(defined($user)       && defined($domain) && defined($courseid) &&
                    105:        defined($coursedom)  && defined($resources) ){
                    106: 	   
                    107: 	#  Only mail if the conditions are ripe for it:
                    108: 	#  The user is a student in the course:
                    109: 	#
                    110: 	
1.92      albertel  111: 	if (&is_student()) {
1.77      foxr      112: 	    # build the subject and message body:
1.84      albertel  113: 	    # print "sending message to course coordinators.<br />";
1.81      foxr      114: 
                    115: 	    # Todo: Convert badurl into a url from file path:
                    116: 
                    117: 	    my $subject  = "Error [$badurl] Print failed for $user".'@'.$domain;
1.77      foxr      118: 	    my $message .= "Print failed to render LaTeX for $user".'@'."$domain\n";
                    119: 	    $message    .= "  User was attempting to print: \n";
1.91      albertel  120: 	    foreach my $resource (split(/:/,$resources)) {
                    121: 		$message    .= "       $resource\n";
                    122: 	    }
1.77      foxr      123: 	    $message    .= "--------------------LaTeX logfile:------------ \n";
                    124: 	    $message    .= $logfile;
                    125: 	    $message    .= "-----------------LaTeX source file: ------------\n";
                    126: 	    
                    127: 	    foreach my $line (@$texfile) {
                    128: 		$message .= "$line\n";
                    129: 	    }
1.81      foxr      130: 	    my (undef, %receivers) = &Apache::lonfeedback::decide_receiver(undef, 0,
                    131: 									  1,1,1);
1.84      albertel  132: 	    # print "<br /> sending...section:  $env{'request.course.sec'}";
1.81      foxr      133: 	    foreach my $dest (keys %receivers) {
1.84      albertel  134: 		# print "<br /> dest is $dest";
1.77      foxr      135: 		my @destinfo = split(/:/,$dest);
                    136: 		my $user = $destinfo[0];
                    137: 		my $dom  = $destinfo[1];
                    138: 
                    139: 		&Apache::lonmsg::user_normal_msg($user, $dom,
                    140: 						 $subject, $message);
                    141: 		
                    142: 		# No point in looking at the return status as there's no good
                    143: 		# error action I can think of right now (log maybe?).
                    144: 	    }
                    145: 	}
                    146:     }
                    147: }
                    148: 
1.49      albertel  149: $|=1;
1.39      sakharuk  150: if (! &LONCAPA::loncgi::check_cookie_and_load_env()) {
                    151:     print <<END;
                    152: Content-type: text/html
                    153: 
                    154: <html>
                    155: <head><title>Bad Cookie</title></head>
                    156: <body>
1.40      sakharuk  157: Your cookie information is incorrect.
1.39      sakharuk  158: </body>
                    159: </html>
                    160: END
                    161:     return;
                    162: }
1.51      albertel  163:  &Apache::lonlocal::get_language_handle();
                    164:  &Apache::loncommon::content_type(undef,'text/html');
1.101     albertel  165: 
                    166:   print(&Apache::loncommon::start_page('Creating PDF'));
1.39      sakharuk  167: 
1.40      sakharuk  168:   my $identifier = $ENV{'QUERY_STRING'};
1.76      albertel  169:   my $texfile = $env{'cgi.'.$identifier.'.file'};
                    170:   my $laystyle = $env{'cgi.'.$identifier.'.layout'};
                    171:   my $numberofcolumns = $env{'cgi.'.$identifier.'.numcol'};
                    172:   my $paper = $env{'cgi.'.$identifier.'.paper'};
                    173:   my $selectionmade = $env{'cgi.'.$identifier.'.selection'};
1.79      albertel  174:   my $tableofcontents = $env{'cgi.'.$identifier.'.tableofcontents'};
                    175:   my $tableofindex = $env{'cgi.'.$identifier.'.tableofindex'};
                    176:   my $advanced_role = $env{'cgi.'.$identifier.'.role'};
                    177:   my $number_of_files = $env{'cgi.'.$identifier.'.numberoffiles'}+1;
                    178:   my $student_names = $env{'cgi.'.$identifier.'.studentnames'};
                    179:   my $backref = &Apache::lonnet::unescape($env{'cgi.'.$identifier.'.backref'});
1.43      sakharuk  180: 
1.49      albertel  181:   
1.44      sakharuk  182:   my @names_pack=();
                    183:   if ($student_names=~/_END_/) {  
                    184:       @names_pack=split(/_ENDPERSON_/,$student_names);
                    185:   }
1.39      sakharuk  186: 
1.94      albertel  187: print "<a href=\"$backref\"><b>Return</b></a> to last resource.<br /><br />";
                    188: 
1.14      sakharuk  189:   my $figfile = $texfile;
                    190:   $figfile =~ s/^([^\.]+printout)[^t]+\.tex/$1\.dat/;
                    191:   my $duefile = $texfile;
                    192:   $duefile =~ s/^([^\.]+printout)[^t]+\.tex/$1\.due/;
                    193:   #do we have figures?
1.73      foxr      194:   # print "Figure file: $figfile\n";
1.14      sakharuk  195:   if (-e $figfile) {
1.73      foxr      196:       # print "$figfile exists\n";
1.42      albertel  197:       my %done_conversion;
1.69      matthew   198:       my $temporary_file=IO::File->new($figfile) || die "Couldn't open fig file $figfile for reading: $!\n";
1.14      sakharuk  199:       my @content_of_file = <$temporary_file>;
                    200:       close $temporary_file;  
                    201:       my $noteps;
1.49      albertel  202:       my %prog_state;
1.92      albertel  203:       if ($advanced_role) { %prog_state=&Apache::lonhtmlcommon::Create_PrgWin('','Coverting Images to EPS','Picture Conversion Status',$#content_of_file,'inline','80');  }
1.94      albertel  204:       print('<br />');
1.59      albertel  205:       foreach my $not_eps (@content_of_file) {
1.49      albertel  206: 	  chomp($not_eps);
1.14      sakharuk  207: 	  if ($not_eps ne '') {
1.73      foxr      208: 	      # print "Converting $not_eps"; # Debugging.
1.44      sakharuk  209:               my $status_statement='EPS picture for '.$not_eps;
1.73      foxr      210: 	      # print "$status_statement\n";
1.41      sakharuk  211: 	      $not_eps=~s|\/\.\/|\/|g;
1.14      sakharuk  212: 	      my $eps_f = $not_eps;
1.85      foxr      213: 	      # $eps_f =~ s/\.[^.]*$/\.eps/i;
1.41      sakharuk  214: 	      if ($eps_f=~/\/home\/([^\/]+)\/public_html\//) {
                    215:                   $eps_f=~s/\/home\/([^\/]+)\/public_html/$1/;
                    216: 		  $eps_f = '/home/httpd/prtspool/'.$eps_f;
1.58      sakharuk  217: 	      } elsif ($eps_f=~/$Apache::lonnet::perlvar{'lonDocRoot'}\/res\//) {
                    218: 		  $eps_f=~m/$Apache::lonnet::perlvar{'lonDocRoot'}\/res\/(.+)/;
1.41      sakharuk  219: 		  $eps_f = '/home/httpd/prtspool/'.$1;
1.58      sakharuk  220: 	      } elsif ($eps_f=~/$Apache::lonnet::perlvar{'lonUsersDir'}\//) {
1.57      sakharuk  221: 		  $eps_f=~/$Apache::lonnet::perlvar{'lonUsersDir'}\/([^\/]+)\/\w\/\w\/\w\/(.+)/;
1.56      sakharuk  222: 		  $eps_f = '/home/httpd/prtspool/'.$1.'/'.$2;
1.41      sakharuk  223: 	      }
1.74      foxr      224: 	      $eps_f  =~ s/ /\_/g; # Spaces are problematic for system commands and LaTeX.
1.111   ! foxr      225: 	      # 
        !           226: 	      # If the file is already an .eps or .ps file,
        !           227: 	      # We really just need to copy it from where it was to prtspool
        !           228: 	      # but with the spaces substituted to _'s.
        !           229: 	      #
        !           230: 	      my ($path, $nsname, $sext) = fileparse($eps_f, qr/\.(ps|eps)/i);
        !           231: 	      if ($sext =~/ps$/i) {
        !           232: 		  File::Path::mkpath($path,0,0777);
        !           233: 		  $not_eps =~ s/^\s+//;
        !           234: 		  $not_eps =~ s/\s+$//;
        !           235: 		  $not_eps =~ s/ /\__/g;
        !           236: 		  File::Copy("$not_eps", "$eps_f"); 
        !           237: 	      } else {
        !           238: 	      
        !           239: 		  $eps_f .= '.eps';	# Just append the eps ext.
        !           240: 		  my $path=$eps_f;
        !           241: 		  $path =~ s/\/([^\/]+)\.eps$//;
        !           242: 		  # print "Final file path: $path "; # Debugging
        !           243: 		  File::Path::mkpath($path,0,0777);
        !           244: 		  $not_eps =~ s/^\s+//;
        !           245: 		  $not_eps =~ s/\s+$//;
        !           246: 		  $not_eps =~ s/ /\\ /g;
        !           247: 		  if ( exists($done_conversion{$not_eps})) { next; }
        !           248: 		  if ($advanced_role) {
        !           249: 		      my $prettyname=$not_eps;
        !           250: 		      $prettyname=~s|/home/([^/]+)/public_html|/priv/$1|;
        !           251: 		      $prettyname=~s|$Apache::lonnet::perlvar{'lonDocRoot'}/|/|;
        !           252: 		      &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state,
        !           253: 							    'Converting to EPS '.$prettyname);
        !           254: 		  }
        !           255: 		  $done_conversion{$not_eps}=1;
        !           256: 		  # print "Converting $not_eps -> $eps_f"; # Debugging
        !           257: 		  system("convert $not_eps $eps_f");
        !           258: 		  # check is eps exist in prtspool
        !           259: 		  if (not -e $eps_f) {
        !           260: 		      # converting an animated gif creates either:
        !           261: 		      # anim.gif.eps.0
        !           262: 		      # or
        !           263: 		      # anim.gif-0.eps
        !           264: 		      for (my $i=0;$i<10000;$i++) {
        !           265: 			  if (-e $eps_f.'.'.$i) {
        !           266: 			      rename($eps_f.'.'.$i, $eps_f);
        !           267: 			      last;
        !           268: 			  }
        !           269: 			  my $anim_eps = $eps_f;
        !           270: 			  $anim_eps =~ s/(\.[^.]*)\.eps$/$1-$i\.eps/i;
        !           271: 			  if (-e $anim_eps) {
        !           272: 			      rename($anim_eps, $eps_f);
        !           273: 			      last;
        !           274: 			  }
1.20      sakharuk  275: 		      }
1.111   ! foxr      276: 		  }
        !           277: 		  
        !           278: 		  # imagemagick 6.2.0-6.2.7 fails to properly handle
        !           279: 		  # convert anim.gif anim.gif.eps
        !           280: 		  # it creates anim.eps instead. 
        !           281: 		  if (not -e $eps_f) {
        !           282: 		      my $eps_f2 = $eps_f;
        !           283: 		      $eps_f2 =~ s/\.[^.]*\.eps$/\.eps/i;
        !           284: 		      if(-e $eps_f2) {
        !           285: 			  rename($eps_f2,$eps_f);
1.98      albertel  286: 		      }
                    287: 		  }
                    288: 	      }
                    289: 
1.14      sakharuk  290: 	  }
                    291:       }
1.92      albertel  292:       if ($advanced_role) { 
1.74      foxr      293: 	  &Apache::lonhtmlcommon::Close_PrgWin('',\%prog_state); 
                    294:       }
1.52      albertel  295:       unlink($figfile);
1.14      sakharuk  296:   }
1.43      sakharuk  297:   #print "$texfile\n"; #name of the tex file for debugging only   
                    298:   my @texfile=($texfile);
                    299:   if ($number_of_files>1) {
1.49      albertel  300:       @texfile=();
                    301:       for (my $i=1;$i<=$number_of_files;$i++) {
1.43      sakharuk  302: 	  my $new_texfile=$texfile;
1.86      foxr      303: 	  $new_texfile=~s/\.tex//;
                    304: 	  $new_texfile = sprintf("%s_%03d.tex", $new_texfile,$i);
1.43      sakharuk  305: 	  push @texfile,$new_texfile;
                    306:       } 
                    307:   }
1.49      albertel  308: 
1.44      sakharuk  309: my $ind=-1;
1.49      albertel  310: my %prog_state;
1.92      albertel  311: if ($advanced_role) { %prog_state=&Apache::lonhtmlcommon::Create_PrgWin('','Print Status','Class Print Status',$number_of_files,'inline','80'); }
1.61      albertel  312: print "<br />";
1.88      foxr      313: my $num_files = @texfile;
1.43      sakharuk  314: foreach $texfile (@texfile) {
1.49      albertel  315:   my $status_statement='';
                    316:   my $link_text='download PDF';
                    317:   $ind++;
                    318:   my @stud_info=split(/_END_/,$names_pack[$ind]);
                    319:   my @tempo_array=split(/:/,$stud_info[0]);
                    320:   my $name;
1.88      foxr      321:   my $name_range='';
1.49      albertel  322:   if ($tempo_array[3]) {
                    323:       $name=$tempo_array[3];
1.89      foxr      324:       ($name_range) = split(/,/,$name, 2);
1.49      albertel  325:   } else {
                    326:       $name=$tempo_array[0].'@'.$tempo_array[1];
1.88      foxr      327:       $name_range = $tempo_array[0];
                    328:   }
                    329:   if (($name ne "") && ($name ne '@') ) { # Could be printing codes...
                    330:       $link_text='<b>'.$name.'</b>';
                    331:       $status_statement.=$name;
1.49      albertel  332:   }
                    333:   if ($#stud_info>0) {
                    334:       @tempo_array=split(/:/,$stud_info[-1]);
1.48      albertel  335:       if ($tempo_array[3]) {
                    336: 	  $name=$tempo_array[3];
1.89      foxr      337: 	  my ($lastname) = split(/,/, $name,2);
                    338: 	  $name_range .= "-".$lastname;
1.48      albertel  339:       } else {
                    340: 	  $name=$tempo_array[0].'@'.$tempo_array[1];
1.88      foxr      341: 	  $name_range .= '-'.$tempo_array[0];
                    342:       }
                    343:       if (($name ne "") && ($name ne '@')) {
                    344: 	  $link_text.=' - <b>'.$name.'</b>';
                    345: 	  $status_statement.=' -  '.$name;
                    346:   
1.48      albertel  347:       }
1.88      foxr      348:   }
                    349:   if(($num_files > 1) && ($link_text eq 'download PDF')) { # Printing codes
                    350:       $link_text = '<b>'.basename($texfile,'.tex').'.pdf</b>';
                    351:       $status_statement .= basename($texfile);
                    352:   }
                    353:   $name_range =~ s/'//g;	# O'Neil -> ONeil e.g.
                    354:   print "<br/>";
1.92      albertel  355:   if ($advanced_role) { &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state,'Creating PDF for '.$status_statement); }
1.88      foxr      356:   #  This little piece of dirt puts username ranges into the original tex
                    357:   #  Tex filename from which they'll propagate into the other filenames as well.
                    358:   #
1.29      sakharuk  359:   if (-e $texfile) {
1.88      foxr      360:       if (($name_range ne '') && ($num_files > 1)) {
                    361: 	  my $newtexfile = $texfile;
                    362: 	  $newtexfile    =~ s/\.tex/$name_range\.tex/;
                    363: 	  rename($texfile, $newtexfile);
                    364: 	  $texfile       = $newtexfile;
                    365:       }
1.29      sakharuk  366:       $texfile =~ m/^(.*)\/([^\/]+)$/; 
                    367:       my $name_file = $2;
                    368:       my $path_file = $1.'/';
                    369:       chdir $path_file;
1.88      foxr      370:       my $dvi_file= $name_file; $dvi_file =~ s/\.tex/$name_range\.dvi/;
1.59      albertel  371:       &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
                    372: 			 "for $status_statement now LaTeXing file",
                    373: 			 \%prog_state,$dvi_file);
1.40      sakharuk  374:       if ($tableofcontents eq 'yes') {
1.63      sakharuk  375:       &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
1.95      foxr      376: 			 "for $status_statement First LaTeX of file for table of contents",
                    377: 			 \%prog_state,$dvi_file);
                    378:       &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
                    379: 			 "for $status_statement Second LaTeX of file for table of contents",
1.63      sakharuk  380: 			 \%prog_state,$dvi_file);
1.40      sakharuk  381:       } #to create table of contents
1.33      sakharuk  382:       my $idxname=$name_file;
                    383:       $idxname=~s/\.tex$/\.idx/;
1.40      sakharuk  384:       if ($tableofindex eq 'yes') {
1.63      sakharuk  385: 	  &busy_wait_command("makeindex $idxname",
                    386: 			     "making index file",
                    387: 			     \%prog_state,$idxname);
                    388: 	  &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
                    389: 			     "for $status_statement now LaTeXing file for index section",
                    390: 			     \%prog_state,$dvi_file);
1.33      sakharuk  391:       } #to create index
1.29      sakharuk  392:       #Do we have a latex error in the log file?
1.67      sakharuk  393:       my $logfilename = $texfile; $logfilename =~ s/\.tex$/\.log/;
1.69      matthew   394:       my $temporary_file=IO::File->new($logfilename) || die "Couldn't open log file $logfilename for reading: $!\n";
1.29      sakharuk  395:       my @content_of_file = <$temporary_file>;
                    396:       close $temporary_file; 
1.30      sakharuk  397:       my $body_log_file = join(' ',@content_of_file);
                    398:       $logfilename =~ s/\.log$/\.html/;
                    399:       $temporary_file = IO::File->new('>'.$logfilename); 
                    400:       print $temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_log_file.'</pre></body></html>'."\n";
1.29      sakharuk  401:       if ($body_log_file=~m/!\s+Emergency stop/) {
                    402: 	  my $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART';
                    403: 	  my $whereitends = rindex $body_log_file,'STAMPOFPASSEDRESOURCEEND';
1.81      foxr      404: 	  my $badresource;
1.83      foxr      405: 	  my $badtext;
1.29      sakharuk  406: 	  if ($whereitbegins!=-1 and $whereitends!=-1) {
1.83      foxr      407: 	      $badtext = substr($body_log_file,$whereitbegins+26, $whereitends-$whereitbegins-26);
1.81      foxr      408: 	      $whereitbegins  = rindex $badtext,'located in';
                    409: 	      if ($whereitbegins != -1) {
                    410: 		  
                    411: 		  $badresource = substr($badtext, $whereitbegins+27, 
                    412: 					length($badtext) - $whereitbegins - 48);
1.84      albertel  413: 		  # print "<br />failing resourcename: $badresource<br />";
1.81      foxr      414: 	      }
1.29      sakharuk  415: 	  }
1.83      foxr      416: 	  
1.75      albertel  417:           if ($advanced_role) {  
1.83      foxr      418: 	      #LaTeX failed to parse tex file 
                    419: 	      print "<h2>LaTeX could not successfully parse your tex file.</h2>";
                    420: 	      print "It probably has errors in it.<br />";
                    421: 	      print "With very high probability this error occured in ".$badtext."<br /><br />";
1.84      albertel  422: 	      print "Here are the error messages in the LaTeX log file<br /><pre>";
1.90      foxr      423: 
1.83      foxr      424: 	      my $sygnal = 0;
                    425: 	      for (my $i=0;$i<=$#content_of_file;$i++) {
                    426: 		  if ($content_of_file[$i]=~m/^Runaway argument?/ or $content_of_file[$i]=~m/^!/) {
                    427: 		      $sygnal = 1;
                    428: 		  } 
                    429: 		  if ($content_of_file[$i]=~m/Here is how much of/) {
                    430: 		      $sygnal = 0;
                    431: 		  } 
                    432: 		  if ($sygnal) {
                    433: 		      print "$content_of_file[$i]";
                    434: 		  }  
                    435: 	      }
                    436: 	      print "</pre>\n";
1.84      albertel  437: 	      # print "<br /> Advanced role <br />";
1.35      sakharuk  438:               print "<b><big>The link to ";
                    439:               $logfilename=~s/\/home\/httpd//;
                    440: 	      print "<a href=\"$logfilename\">Your log file </a></big></b>";
                    441: 	      print "\n";
                    442:               #link tooriginal LaTeX file (included according Michael Hamlin desire)
1.69      matthew   443: 	      my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open tex file $texfile for reading: $!\n";
1.35      sakharuk  444: 	      my @tex_content_of_file = <$tex_temporary_file>;
                    445: 	      close $tex_temporary_file; 
                    446: 	      my $body_tex_file = join(' ',@tex_content_of_file);
                    447: 	      $texfile =~ s/\.tex$/aaaaa\.html/;
                    448: 	      $tex_temporary_file = IO::File->new('>'.$texfile); 
                    449: 	      print $tex_temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_tex_file.'</pre></body></html>'."\n";
                    450: 	      print "<br /><br />";
                    451: 	      print "<b><big>The link to ";
                    452: 	      $texfile=~s/\/home\/httpd//;
                    453: 	      print "<a href=\"$texfile\">Your original LaTeX file </a></big></b>";
                    454: 	      print "\n";
1.90      foxr      455: 	      my $help_text = &Apache::loncommon::help_open_topic("Print_Resource", "Help on printing");
                    456: 	      print ("$help_text");
                    457: 
1.77      foxr      458: 	  } else {		# Student role...
                    459: 	      #  at this point:
                    460: 	      #    $body_log_file - contains the log file.
                    461:               #    $name_file     - is the name of the LaTeX file.
                    462:               #    $identifier    - is the unique LaTeX identifier.l
                    463: 
1.84      albertel  464: 	      print "<br />There are errors in $badtext";
                    465: 	      print "<br />These errors prevent this resource from printing correctly";
1.77      foxr      466: 	      my $tex_handle = IO::File->new($name_file);
                    467: 	      my @tex_contents = <$tex_handle>;
1.81      foxr      468: 	      &send_error_mail($identifier, $badresource, $body_log_file, \@tex_contents);
1.90      foxr      469: 	      print "<br />A message has been sent to the instructor describing this failure<br />";
                    470: 	      my $help_text = &Apache::loncommon::help_open_topic("Print_Resource", "Help on printing");
                    471: 	      print  ("$help_text");
                    472: 
1.36      sakharuk  473: 	  }
1.35      sakharuk  474: 
1.29      sakharuk  475:       } elsif ($body_log_file=~m/<inserted text>/) {
                    476: 	  my $whereitbegins = index $body_log_file,'<inserted text>';
1.59      albertel  477: 	  print "You are running LaTeX in <b>batch mode</b>.";
1.30      sakharuk  478: 	  while ($whereitbegins != -1) {
                    479: 	      my $tempobegin=$whereitbegins;
                    480: 	      $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART',$whereitbegins;
                    481: 	      my $whereitends = index $body_log_file,'STAMPOFPASSEDRESOURCEEND',$whereitbegins;
1.34      sakharuk  482: 	      print "<br />It has found an error in".substr($body_log_file,$whereitbegins+26,$whereitends-$whereitbegins-26)." <br /> and corrected it.\n";
1.30      sakharuk  483: 	      print "Usually this correction is valid but you probably need to check the indicated resource one more time and implement neccessary corrections by yourself.\n";
                    484: 	      $whereitbegins = index $body_log_file,'<inserted text>',$tempobegin+10;
                    485: 	  }
1.29      sakharuk  486: 	  $name_file =~ s/\.tex/\.dvi/;
                    487: 	  my $new_name_file = $name_file;
                    488: 	  $new_name_file =~ s/\.dvi/\.ps/;
1.67      sakharuk  489: 	  my $papera=$paper;
1.62      sakharuk  490: 	  if ($papera eq 'letter') {$papera='';}
                    491: 	  if ($papera ne '') {$papera='-t'.$papera;}
                    492: 	  my $comma = "dvips $papera -Ppdf -G0 -o $new_name_file";
1.59      albertel  493: 	  &busy_wait_command("$comma $name_file 1>/dev/null 2>/dev/null",
                    494: 			     "for $status_statement now Converting to PS",
                    495: 			     \%prog_state,$new_name_file);
1.29      sakharuk  496: 	  if (-e $new_name_file) {
1.102     foxr      497: 	      my $latex_file = $name_file;
                    498: 	      $latex_file    =~ s/\.dvi/\.tex/;
                    499: 	      &repaginate($new_name_file, $latex_file, $numberofcolumns);
                    500: 	      #
                    501: 	      #  Now have to re-latex, re dvips again to 
                    502: 	      #  get the repaginated postscript.
                    503: 	      #
                    504: 	      &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
                    505: 				 "for $status_statement first latex to repaginate",
                    506: 				 \%prog_state, $name_file);
1.105     foxr      507: 	      if ($tableofcontents eq 'yes') {
                    508: 		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
                    509: 				     "for $status_statement second latex to repaginate",
                    510: 				     \%prog_state, $name_file);
                    511: 		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
                    512: 				     "for $status_statement third latex to repaginate",
                    513: 				     \%prog_state, $name_file);
                    514: 	      }
                    515: 	      if ($tableofindex eq 'yes') {
                    516: 		  my $idxname = $latex_file;
                    517: 		  $idxname =~ s/\.tex$/\.idx/;
                    518: 		  &busy_wait_command("makindex $idxname",
                    519: 				     "Re-creating index file",
                    520: 				     \%prog_state, $idxname);
                    521: 		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
                    522: 				     "for $status_statement now Recreting index (latex)",
                    523: 				     \%prog_state, $dvi_file);
                    524: 
                    525: 	      }
1.102     foxr      526: 	      &busy_wait_command("$comma $name_file 1>dev/null 2>/dev/null",
                    527: 				 "for $status_statement dvips to repaginate",
                    528: 				 \%prog_state, $new_name_file);
                    529: 	      print "\n<h1>PDF output file (see link below)</h1>\n";
1.29      sakharuk  530: 	      $new_name_file =~ m/^(.*)\./;
1.59      albertel  531: 	      my $ps_file = my $tempo_file = $1.'temporar.ps';
                    532: 	      my $pdf_file = $1.'.pdf';
1.29      sakharuk  533: 	      if ($laystyle eq 'album' and $numberofcolumns eq '2') {
1.82      albertel  534: 		  my $papera=$paper;
                    535:                   if ($papera eq 'letter') {$papera='';}
                    536: 		  if ($papera ne '') {$papera='-p'.$papera;}
                    537: 		  $comma = "psnup $papera -2 -s1.0 $new_name_file";
1.59      albertel  538: 		  &busy_wait_command("$comma $tempo_file 1>/dev/null 2>/dev/null",
                    539: 				     "for $status_statement now Modifying PS layout",
                    540: 				     \%prog_state,$tempo_file); 
1.29      sakharuk  541: 	      } elsif ($laystyle eq 'book' and $numberofcolumns eq '2') {
1.67      sakharuk  542: 		  my $papera=$paper;
                    543:                   if ($papera eq 'letter') {$papera='';}
1.62      sakharuk  544: 		  if ($papera ne '') {$papera='-p'.$papera;}
                    545: 		  $comma = 'pstops '.$papera.' "2:0+1(0.48w,0)"';
1.63      sakharuk  546: 		  &busy_wait_command("$comma $new_name_file $tempo_file 1>/dev/null 2>/dev/null",
                    547: 				     "for $status_statement now Modifying PS layout",
                    548: 				     \%prog_state,$tempo_file); 
                    549: 
1.29      sakharuk  550: 	      } else {
1.59      albertel  551: 		  $ps_file=$new_name_file;
1.29      sakharuk  552: 	      }	    
1.59      albertel  553: 	      &busy_wait_command("ps2pdf $ps_file $pdf_file 1>/dev/null 2>/dev/null",
                    554: 				 "for $status_statement now Converting PS to PDF",
                    555: 				 \%prog_state, $pdf_file);
                    556: 
1.29      sakharuk  557: 	      my $texlog = $texfile;
                    558: 	      my $texaux = $texfile;
                    559: 	      my $texdvi = $texfile;
                    560: 	      my $texps = $texfile;
                    561: 	      $texlog =~ s/\.tex/\.log/;
                    562: 	      $texaux =~ s/\.tex/\.aux/;
                    563: 	      $texdvi =~ s/\.tex/\.dvi/;
                    564: 	      $texps =~ s/\.tex/\.ps/;
1.30      sakharuk  565: 	      my @garb = ($texaux,$texdvi,$texps);
1.29      sakharuk  566: #	  unlink @garb;
                    567: 	      unlink $duefile;
1.59      albertel  568: 	      print "<a href=\"/prtspool/$pdf_file\">Your PDF document</a>";
1.75      albertel  569: 	  }
                    570: 	  if ($advanced_role) {  
                    571: 	      print "<br /><br />";
                    572: 	      print "<b><big>The link to ";
                    573: 	      $logfilename=~s/\/home\/httpd//;
                    574: 	      print "<a href=\"$logfilename\">Your log file </a></big></b>";
                    575: 	      print "\n";
                    576: 	      #link tooriginal LaTeX file (included according Michael Hamlin desire)
                    577: 	      my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open tex file $texfile for reading: $!\n";
                    578: 	      my @tex_content_of_file = <$tex_temporary_file>;
                    579: 	      close $tex_temporary_file; 
                    580: 	      my $body_tex_file = join(' ',@tex_content_of_file);
                    581: 	      $texfile =~ s/\.tex$/aaaaa\.html/;
                    582: 	      $tex_temporary_file = IO::File->new('>'.$texfile); 
                    583: 	      print $tex_temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_tex_file.'</pre></body></html>'."\n";
                    584: 	      print "<br /><br />";
                    585: 	      print "<b><big>The link to ";
                    586: 	      $texfile=~s/\/home\/httpd//;
                    587: 	      print "<a href=\"$texfile\">Your original LaTeX file </a></big></b>";
                    588: 	      print "\n";
1.29      sakharuk  589: 	  }
                    590:       } else {
                    591: 	  #LaTeX successfully parsed tex file 
                    592: 	  $name_file =~ s/\.tex/\.dvi/;
                    593: 	  my $new_name_file = $name_file;
                    594: 	  $new_name_file =~ s/\.dvi/\.ps/;
1.67      sakharuk  595: 	  my $papera=$paper;
1.62      sakharuk  596: 	  if ($papera eq 'letter') {$papera='';}
                    597: 	  if ($papera ne '') {$papera='-t'.$papera;}
                    598: 	  my $comma = "dvips $papera -Ppdf -G0 -o $new_name_file";
1.59      albertel  599: 	  &busy_wait_command("$comma $name_file 1>/dev/null 2>/dev/null",
                    600: 			     "for $status_statement now Converting to PS",
                    601: 			     \%prog_state,$new_name_file);
1.29      sakharuk  602: 	  if (-e $new_name_file) {
1.102     foxr      603: 	      my $latex_file = $name_file;
                    604: 	      $latex_file =~ s/\.dvi/\.tex/;
                    605: 	      &repaginate($new_name_file, $latex_file,  $numberofcolumns);
                    606: 	      &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
                    607: 				 "for $status_statement first latex to repaginate",
                    608: 				 \%prog_state, $name_file);
1.105     foxr      609: 	      if ($tableofcontents eq 'yes') {
                    610: 		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
                    611: 				     "for $status_statement second latex to repaginate",
                    612: 				     \%prog_state, $name_file);
                    613: 		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
                    614: 				     "for $status_statement third latex to repaginate",
                    615: 				     \%prog_state, $name_file);
                    616: 	      }
                    617: 	      if ($tableofindex eq 'yes') {
                    618: 		  my $idxname = $latex_file;
                    619: 		  $idxname    =~ s/\.tex$/\.idx/;
                    620: 		  &busy_wait_command("makeindex $idxname",
                    621: 				     "Re-creating index file",
                    622: 				     \%prog_state, $idxname);
                    623: 		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
                    624: 				     "for $status_statement now Recreting index (latex)",
                    625: 				     \%prog_state, $dvi_file);
                    626: 	      }
1.102     foxr      627: 	      &busy_wait_command("$comma $name_file 1>/dev/null 2>/dev/null",
                    628: 				 "for $status_statement dvips to repaginate",
                    629: 				 \%prog_state, $new_name_file);
1.61      albertel  630: 	      print "<br />";
1.29      sakharuk  631: 	      $new_name_file =~ m/^(.*)\./;
1.59      albertel  632: 	      my $ps_file = my $tempo_file = $1.'temporar.ps';
                    633: 	      my $pdf_file = $1.'.pdf';
1.82      albertel  634: 	      $papera=~s/t/p/;
1.29      sakharuk  635: 	      if ($laystyle eq 'album' and $numberofcolumns eq '2') {
1.82      albertel  636: 		  $comma = "psnup $papera -2 -s1.0 $new_name_file";
1.59      albertel  637: 		  &busy_wait_command("$comma $tempo_file 1>/dev/null 2>/dev/null",
                    638: 				     "for $status_statement now Modifying PS layout",
                    639: 				     \%prog_state,$tempo_file);
1.29      sakharuk  640: 	      } elsif ($laystyle eq 'book' and $numberofcolumns eq '2') {
1.65      sakharuk  641: 		  $comma = 'pstops '.$papera.' "2:0+1(0.48w,0)"';
1.59      albertel  642: 		  &busy_wait_command("$comma $new_name_file $tempo_file 1>/dev/null 2>/dev/null",
                    643: 				     "for $status_statement now Modifying PS layout",
                    644: 				     \%prog_state,$tempo_file); 
1.29      sakharuk  645: 	      } else {
1.59      albertel  646: 		  $ps_file=$new_name_file;
                    647: 	      }
1.67      sakharuk  648: 	      my $addtoPSfile={'legal'=>'<< /PageSize [612 1008] >> setpagedevice',
                    649:                                'tabloid'=>'<< /PageSize [792 1224] >> setpagedevice',
                    650:                                'executive'=>,'<< /PageSize [540 720] >> setpagedevice',
                    651:                                'a2'=>'<< /PageSize [1195.02 1690.09] >> setpagedevice',
                    652:                                'a3'=>'<< /PageSize [842 1195.02] >> setpagedevice',
                    653:                                'a4'=>'<< /PageSize [595.2 842] >> setpagedevice',
                    654:                                'a5'=>'<< /PageSize [421.1 595.2] >> setpagedevice',
                    655:                                'a6'=>'<< /PageSize [298.75 421.1] >> setpagedevice',
                    656: 			   };
                    657: 	      if ($paper ne 'letter') {
1.69      matthew   658: 		  open(FFH,'<',$ps_file) || die "Couldn't open ps file $ps_file for reading: $!\n";
1.63      sakharuk  659: 		  my $new_ps_file='new'.$ps_file;
1.69      matthew   660: 		  open(FFHS,'>',$new_ps_file) || die "Couldn't open new ps file $new_ps_file for reading: $!\n";
1.67      sakharuk  661: 		  print FFHS $addtoPSfile->{$paper}."\n";
1.63      sakharuk  662: 		  while (<FFH>) {
                    663: 		      print FFHS $_;
                    664: 		  }
1.62      sakharuk  665: 		  close(FFH);
1.63      sakharuk  666: 		  close(FFHS);
                    667: 		  $ps_file=$new_ps_file;	  
1.62      sakharuk  668: 	      }
1.59      albertel  669: 	      &busy_wait_command("ps2pdf $ps_file $pdf_file 1>/dev/null 2>/dev/null",
                    670: 				 "for $status_statement now Converting PS to PDF",
                    671: 				 \%prog_state,$pdf_file);
                    672: 	    
1.29      sakharuk  673: 	      my $texlog = $texfile;
                    674: 	      my $texaux = $texfile;
                    675: 	      my $texdvi = $texfile;
                    676: 	      my $texps = $texfile;
                    677: 	      $texlog =~ s/\.tex/\.log/;
                    678: 	      $texaux =~ s/\.tex/\.aux/;
                    679: 	      $texdvi =~ s/\.tex/\.dvi/;
                    680: 	      $texps =~ s/\.tex/\.ps/;
                    681: 	      my @garb = ($texlog,$texaux,$texdvi,$texps);
1.22      sakharuk  682: #	  unlink @garb;
1.29      sakharuk  683: 	      unlink $duefile;
1.68      sakharuk  684: 	      print "<a href=\"/prtspool/$pdf_file\">$link_text - click here to download pdf</a>";
1.29      sakharuk  685: 	      print "\n";
                    686: 	  }
1.63      sakharuk  687:       }  
1.29      sakharuk  688:   } else {
                    689:       print "LaTeX file $texfile was not created successfully";
1.14      sakharuk  690:   }
1.43      sakharuk  691: }
1.45      sakharuk  692: print "<br />";
1.44      sakharuk  693: if ($number_of_files>1) {
1.45      sakharuk  694:     my $zipfile=$texfile[0];
                    695:     $zipfile=~s/\.tex/\.zip/;
                    696:     my $statement="zip $zipfile";
1.44      sakharuk  697:     foreach my $file (@texfile) {
1.45      sakharuk  698: 	$file=~s/\.tex/.\pdf/;
                    699: 	$statement.=' '.$file; 
1.44      sakharuk  700:     }
1.49      albertel  701:     print("<pre>Zip Output:\n");
                    702:     system($statement);
                    703:     print("</pre>");
1.45      sakharuk  704:     $zipfile=~s/\/home\/httpd//;
1.49      albertel  705:     print "<br /> A <a href=\"$zipfile\">ZIP file</a> of all the PDFs.";
1.44      sakharuk  706: }
1.92      albertel  707: if ($advanced_role) { &Apache::lonhtmlcommon::Close_PrgWin('',\%prog_state); }
1.97      albertel  708: print(&Apache::loncommon::end_page());
1.59      albertel  709: my $done;
1.102     foxr      710: 
1.59      albertel  711: sub REAPER {
                    712:     $done=1;
                    713: }
                    714: 
                    715: sub busy_wait_command {
                    716:     my ($command,$message,$progress_win,$output_file)=@_;
                    717:     
                    718:     $SIG{CHLD} = \&REAPER;
                    719:     $done=0;
                    720:     my $pid=open(CMD,"$command |");
1.92      albertel  721:     if ($advanced_role) {
1.60      albertel  722: 	&Apache::lonhtmlcommon::Update_PrgWin('',$progress_win,$message);
                    723:     }
1.59      albertel  724:     while(!$done) {
                    725: 	sleep 1;
                    726: 	my $extra_msg;
                    727: 	if ($output_file) {
                    728: 	    my $size=(stat($output_file))[7];
                    729: 	    $extra_msg=", $size bytes generated";
                    730: 	}
1.92      albertel  731: 	if ($advanced_role) {
1.60      albertel  732: 	    &Apache::lonhtmlcommon::Update_PrgWin('',$progress_win,
                    733: 						  $message.$extra_msg);
                    734: 	}
1.59      albertel  735:     }
                    736:     $SIG{CHLD}='IGNORE';
                    737:     close(CMD);
                    738: }
1.1       sakharuk  739: 
1.102     foxr      740: #  Repagninate
1.99      foxr      741: #  What we need to do:
                    742: #   - Count the number of pages in each student.
1.102     foxr      743: #   - Rewrite the latex file replacing the \specials that
                    744: #     mark the end of student with an appropriate number of newlines.
                    745: #   parameters:
                    746: #     psfile     - Postscript filename
                    747: #     latexfile  - LaTeX filename
                    748: #     columns    - number of columns.
                    749: sub repaginate {
1.100     foxr      750: 
                    751:     # We will try to do this in 2 passes through the postscript since
                    752:     # the postscript is potentially large, to do 2 passes, the first pass
                    753:     # must be able to calculate the total number of document pages so that
                    754:     # at the beginning of the second pass we already know how to replace
                    755:     #  %%Pages:
                    756: 
                    757:     #  Figure out
                    758:     #    1. Number of pages in the document
                    759:     #    2. Maximum number of pages in a student
                    760:     #    3. Number of pages in each student.
1.99      foxr      761: 
1.102     foxr      762:     my ($postscript_filename, $latex_filename, $num_columns) = @_;
1.99      foxr      763:     open(PSFILE, "<$postscript_filename");
1.100     foxr      764:     my $line;
                    765:     my $total_pages;		# Total pages in document.
                    766:     my $seen_pages        = 0;	# There are several %%Pages only the first is useful
                    767:     my @pages_in_student;	# For each student his/her initial page count.
                    768:     my $max_pages = 0;		# Pages in 'longest' student.
1.102     foxr      769:     my $page_number = 0;
1.104     foxr      770:     &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state, 
1.110     albertel  771: 					  &mt("Counting pages for student: [_1]",1));
1.104     foxr      772: 
1.100     foxr      773:     while ($line = <PSFILE>) {
                    774: 	
                    775: 	# Check for total pages (%%Pages:)
                    776: 
1.101     albertel  777: 	if (($line =~ /^%%Pages:/) && (!$seen_pages)) {
1.100     foxr      778: 	    my @pageinfo = split(/ /,$line);
                    779: 	    $total_pages = $pageinfo[1];
                    780: 	    $seen_pages  = 1;
                    781: 	}
                    782: 	#  Check for %%Page: n m  $page_number will be the
                    783: 	#  biggest of these until we see an endofstudent.
                    784: 	#  Note that minipages generate spurious %Page: 1 1's so
                    785: 	#  we only are looking for the largest n (n is page number at the
                    786: 	#  bottom of the page, m the page number within the document.
                    787: 	#
1.102     foxr      788: 
1.101     albertel  789: 	if ($line =~ /^%%Page:/) {
1.100     foxr      790: 	    my @pageinfo = split(/ /, $line);
                    791: 	    if ($page_number < $pageinfo[1]) {
                    792: 		$page_number = $pageinfo[1];
1.110     albertel  793: 	    } elsif ($pageinfo[2] ne 1) {
                    794: 		#  current page count reset, and it's not because of a 
                    795: 		#    minipage 
                    796: 		# - save the page_number, reset and, if necessary
                    797: 		#    update max_pages.
                    798: 		push(@pages_in_student, $page_number);
                    799: 		&Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state, 
                    800: 						      &mt("Counting pages for student: [_1]", scalar(@pages_in_student)));
                    801: 		if ($page_number > $max_pages) {
                    802: 		    $max_pages = $page_number;
                    803: 		}
                    804: 		$page_number = $pageinfo[1];
1.100     foxr      805: 	    }
                    806: 	}
                    807: 
                    808: 	
                    809:     }
1.110     albertel  810:     # file ended so one more student
                    811:     push(@pages_in_student, $page_number);
                    812:     &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state, 
                    813: 					  &mt("Counting pages for student: [_1]",scalar(@pages_in_student)));
                    814:     if ($page_number > $max_pages) {
                    815: 	$max_pages = $page_number;
                    816:     }
                    817:     $page_number = 0;
                    818:     
1.99      foxr      819:     close(PSFILE);
1.102     foxr      820: 
                    821:     #  If 2 columns, max_pages must go to an even number of columns:
1.103     foxr      822: 
1.102     foxr      823:    
                    824:     if ($num_columns == 2) {
                    825: 	if ($max_pages % 2) {
                    826: 	    $max_pages++;
                    827: 	}
                    828:     }
1.100     foxr      829:     
1.102     foxr      830:     #  Now rewrite the LaTex file, substituting our \special
                    831:     #  with an appropriate number of \newpage directives.
                    832: 
                    833:     my $outfilename = $latex_filename."temp";
                    834: 
                    835:     open(LATEXIN, "<$latex_filename");
                    836:     open(LATEXOUT, ">$outfilename");
                    837: 
                    838: 
1.110     albertel  839:     my $student_number    = 0;	# Index of student we're working on.
1.104     foxr      840:     &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state, 
                    841: 					  "Repaginating student ".$student_number+1);
1.102     foxr      842: 
                    843:     while (my $line = <LATEXIN>) {
                    844: 	if ($line eq "\\special{ps:ENDOFSTUDENTSTAMP}\n") {
                    845: 	    # only end of student stamp if next line is ENDOFSTUDENTSTAMP:
                    846: 
                    847: 
                    848: 	    # End of student replace with 0 or more newpages.
                    849: 	    
                    850: 	    my $addlines = $max_pages - $pages_in_student[$student_number];
                    851: 	    while($addlines)  {
1.108     albertel  852: 		print LATEXOUT '\clearpage \strut \clearpage';
1.105     foxr      853: 
1.102     foxr      854: 		$addlines--;
1.100     foxr      855: 	    }
1.102     foxr      856: 	    
1.100     foxr      857: 	    $student_number++;
1.104     foxr      858: 	    &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state, 
                    859: 						  "Repaginating student ".$student_number+1);
1.102     foxr      860: 	    
                    861: 	} else {
                    862: 	    print LATEXOUT $line;
1.100     foxr      863: 	}
                    864:     }
                    865: 
1.102     foxr      866:     close(LATEXIN);
                    867:     close(LATEXOUT);
1.108     albertel  868:     rename($outfilename, $latex_filename);
1.100     foxr      869: 
1.99      foxr      870: }
1.4       sakharuk  871: 

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