--- loncom/interface/printout.pl 2008/03/18 10:29:56 1.134
+++ loncom/interface/printout.pl 2008/03/26 09:50:21 1.135
@@ -1,7 +1,7 @@
#!/usr/bin/perl
# CGI-script to run LaTeX, dvips, ps2ps, ps2pdf etc.
#
-# $Id: printout.pl,v 1.134 2008/03/18 10:29:56 foxr Exp $
+# $Id: printout.pl,v 1.135 2008/03/26 09:50:21 foxr Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -45,6 +45,11 @@ use strict;
my $busy_wait_timeout = 30;
+sub debug {
+ my ($text) = @_;
+ print "$text
\n";
+}
+
# Determine if a user is operating as a student for this course/domain.
#Parameters:
# none
@@ -234,35 +239,59 @@ if (-e $figfile) {
# End of figure conversion section:
#
#--------------------------------------------------------------------------------------------
+#
+# Figure out which Tex files we need to process. If this is a large class e.g.
+# the instructor may have asked that the printout be by section, one section per file
+# in that case, the output tex fiels will be the base filename with 3 digit serial numbers
+# just prior to the .tex file type.
+# By the time this loop exits, @texfile is an array of the files to process.
+#
+my @texfile=($texfile);
+if ($number_of_files>1) {
+ @texfile=();
+ for (my $i=1;$i<=$number_of_files;$i++) {
+ my $new_texfile=$texfile;
+ $new_texfile=~s/\.tex//;
+ $new_texfile = sprintf("%s_%03d.tex", $new_texfile,$i);
+ push @texfile,$new_texfile;
+ }
+}
-
-
- #print "$texfile\n"; #name of the tex file for debugging only
- my @texfile=($texfile);
- if ($number_of_files>1) {
- @texfile=();
- for (my $i=1;$i<=$number_of_files;$i++) {
- my $new_texfile=$texfile;
- $new_texfile=~s/\.tex//;
- $new_texfile = sprintf("%s_%03d.tex", $new_texfile,$i);
- push @texfile,$new_texfile;
- }
- }
+#--------------------------------------------------------------------------------------------
my $ind=-1;
+
my %prog_state;
-if ($advanced_role) { %prog_state=&Apache::lonhtmlcommon::Create_PrgWin('','Print Status','Class Print Status',$number_of_files,'inline','80'); }
+if ($advanced_role) {
+ %prog_state=&Apache::lonhtmlcommon::Create_PrgWin('','Print Status','Class Print Status',$number_of_files,'inline','80');
+}
print "
";
-my $num_files = @texfile;
+my $num_files = @texfile; # How does this differ from $number_of_files , can that be 0?
+
+
+
+
foreach $texfile (@texfile) {
my $status_statement='';
my $link_text='download PDF';
$ind++;
+
+ #---------------------------------------------------------------------------------------
+ # This chunk of code
+ # determines the status message for the printout, and the download link text.
+ # If the print is for one or more students, both will contain the range of students
+ # covered by this file.
+ #
+
my @stud_info=split(/_END_/,$names_pack[$ind]);
- my @tempo_array=split(/:/,$stud_info[0]);
+ my @tempo_array=split(/:/,$stud_info[0]); # username:domain:section:full name:...
my $name;
my $name_range='';
+
+ # $name -> Either user's full name or username@domain
+ # $name_range -> Either user's last name or usrname.
+
if ($tempo_array[3]) {
$name=$tempo_array[3];
($name_range) = split(/,/,$name, 2);
@@ -270,10 +299,20 @@ foreach $texfile (@texfile) {
$name=$tempo_array[0].'@'.$tempo_array[1];
$name_range = $tempo_array[0];
}
+
+ # If there truly is a name add it to the status text so we know which
+ # user is getting printed.
+ #
+
if (($name ne "") && ($name ne '@') ) { # Could be printing codes...
$link_text=''.$name.'';
$status_statement.=$name;
}
+
+ # Group of students being printed...
+ # $name_range -> first student's name - last student's name
+ #
+
if ($#stud_info>0) {
@tempo_array=split(/:/,$stud_info[-1]);
if ($tempo_array[3]) {
@@ -290,286 +329,73 @@ foreach $texfile (@texfile) {
}
}
- if(($num_files > 1) && ($link_text eq 'download PDF')) { # Printing codes
+
+ # $name_range is the range of names in this file.
+ # $name is the first of the names in this file.
+ #
+ #-----------------------------------------------------------------------
+
+ # If the number of files is > 1, but we don't have multiple
+ # student names, we must be printing an exam from codes.
+ # The download link becomes the filename (basename.tex
+ # The status info has the basename appended to it.
+ #
+ if(($num_files > 1) && ($link_text eq 'download PDF')) {
$link_text = ''.basename($texfile,'.tex').'.pdf';
$status_statement .= basename($texfile);
}
+
+
+ #------------------------------------------------------------------------
+
$name_range =~ s/'//g; # O'Neil -> ONeil e.g.
+
+
print "
";
- if ($advanced_role) { &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state,'Creating PDF for '.$status_statement); }
- # This little piece of dirt puts username ranges into the original tex
- # Tex filename from which they'll propagate into the other filenames as well.
- #
- if (-e $texfile) {
+ if ($advanced_role) {
+ &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state,'Creating PDF for '.$status_statement);
+ }
+
+ if (-e $texfile) { # Ensure the tex file exists:
+
+ #---------------------------------------------------------------------
+ #
+ # Put username ranges into the original tex
+ # Tex filename from which they'll propagate into the other filenames as well.
+ #
+
if (($name_range ne '') && ($num_files > 1)) {
my $newtexfile = $texfile;
$newtexfile =~ s/\.tex/$name_range\.tex/;
rename($texfile, $newtexfile);
$texfile = $newtexfile;
}
+
+ #---------------------------------------------------------------------
+
$texfile =~ m/^(.*)\/([^\/]+)$/;
my $name_file = $2;
my $path_file = $1.'/';
chdir $path_file;
my $dvi_file= $name_file; $dvi_file =~ s/\.tex$/\.dvi/;
- &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
- "for $status_statement now LaTeXing file",
- \%prog_state,$dvi_file, $busy_wait_timeout);
- if ($tableofcontents eq 'yes') {
- &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
- "for $status_statement First LaTeX of file for table of contents",
- \%prog_state,$dvi_file, $busy_wait_timeout);
- &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
- "for $status_statement Second LaTeX of file for table of contents",
- \%prog_state,$dvi_file,$busy_wait_timeout);
- } #to create table of contents
- my $idxname=$name_file;
- $idxname=~s/\.tex$/\.idx/;
- if ($tableofindex eq 'yes') {
- &busy_wait_command("makeindex $idxname",
- "making index file",
- \%prog_state,$idxname);
- &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
- "for $status_statement now LaTeXing file for index section",
- \%prog_state,$dvi_file, $busy_wait_timeout);
- } #to create index
- #Do we have a latex error in the log file?
- my $logfilename = $texfile; $logfilename =~ s/\.tex$/\.log/;
- my $temporary_file=IO::File->new($logfilename) || die "Couldn't open log file $logfilename for reading: $!\n";
- my @content_of_file = <$temporary_file>;
- close $temporary_file;
- my $body_log_file = join(' ',@content_of_file);
- $logfilename =~ s/\.log$/\.html/;
- $temporary_file = IO::File->new('>'.$logfilename);
- print $temporary_file 'LOGFILE'.$body_log_file.'
'."\n";
- if ($body_log_file=~m/!\s+Emergency stop/) {
- my $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART';
- my $whereitends = rindex $body_log_file,'STAMPOFPASSEDRESOURCEEND';
- my $badresource;
- my $badtext;
- if ($whereitbegins!=-1 and $whereitends!=-1) {
- $badtext = substr($body_log_file,$whereitbegins+26, $whereitends-$whereitbegins-26);
- $whereitbegins = rindex $badtext,'located in';
- if ($whereitbegins != -1) {
-
- $badresource = substr($badtext, $whereitbegins+27,
- length($badtext) - $whereitbegins - 48);
- # print "
failing resourcename: $badresource
";
- }
- }
-
- if ($advanced_role) {
- #LaTeX failed to parse tex file
- print "LaTeX could not successfully parse your tex file.
";
- print "It probably has errors in it.
";
- print "With very high probability this error occured in ".$badtext."
";
- print "Here are the error messages in the LaTeX log file
";
-
- my $sygnal = 0;
- for (my $i=0;$i<=$#content_of_file;$i++) {
- if ($content_of_file[$i]=~m/^Runaway argument?/ or $content_of_file[$i]=~m/^!/) {
- $sygnal = 1;
- }
- if ($content_of_file[$i]=~m/Here is how much of/) {
- $sygnal = 0;
- }
- if ($sygnal) {
- print "$content_of_file[$i]";
- }
- }
- print "\n";
- # print "
Advanced role
";
- print "The link to ";
- $logfilename=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
- print "Your log file ";
- print "\n";
- #link to original LaTeX file
- my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open tex file $texfile for reading: $!\n";
- my @tex_content_of_file = <$tex_temporary_file>;
- close $tex_temporary_file;
- my $body_tex_file = join(' ',@tex_content_of_file);
- $texfile =~ s/\.tex$/aaaaa\.html/;
- $tex_temporary_file = IO::File->new('>'.$texfile);
- print $tex_temporary_file 'LOGFILE'.$body_tex_file.'
'."\n";
- print "
";
- print "The link to ";
- $texfile=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
- print "Your original LaTeX file ";
- print "\n";
- my $help_text = &Apache::loncommon::help_open_topic("Print_Resource", "Help on printing");
- print ("$help_text");
+ &make_dvi_file($name_file,
+ $dvi_file,
+ $tableofcontents,
+ $tableofindex,
+ $status_statement,
+ \%prog_state,
+ $busy_wait_timeout);
- } else { # Student role...
- # at this point:
- # $body_log_file - contains the log file.
- # $name_file - is the name of the LaTeX file.
- # $identifier - is the unique LaTeX identifier.l
-
- print "
There are errors in $badtext";
- print "
These errors prevent this resource from printing correctly";
- my $tex_handle = IO::File->new($name_file);
- my @tex_contents = <$tex_handle>;
- &send_error_mail($identifier, $badresource, $body_log_file, \@tex_contents);
- print "
A message has been sent to the instructor describing this failure
";
- my $help_text = &Apache::loncommon::help_open_topic("Print_Resource", "Help on printing");
- print ("$help_text");
- }
-
- } elsif ($body_log_file=~m//) {
- my $whereitbegins = index $body_log_file,'';
- print "You are running LaTeX in batch mode.";
- while ($whereitbegins != -1) {
- my $tempobegin=$whereitbegins;
- $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART',$whereitbegins;
- my $whereitends = index $body_log_file,'STAMPOFPASSEDRESOURCEEND',$whereitbegins;
- print "
It has found an error in".substr($body_log_file,$whereitbegins+26,$whereitends-$whereitbegins-26)."
and corrected it.\n";
- 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";
- $whereitbegins = index $body_log_file,'',$tempobegin+10;
- }
- $name_file =~ s/\.tex/\.dvi/;
- my $new_name_file = $name_file;
- $new_name_file =~ s/\.dvi/\.ps/;
- my $papera=$paper;
- if ($papera eq 'letter') {$papera='';}
- if ($papera ne '') {$papera='-t'.$papera;}
- my $comma = "dvips $papera -Ppdf -G0 -o $new_name_file";
- &busy_wait_command("$comma $name_file 1>/dev/null 2>/dev/null",
- "for $status_statement now Converting to PS",
- \%prog_state,$new_name_file);
- if (-e $new_name_file) {
- my $latex_file = $name_file;
- $latex_file =~ s/\.dvi/\.tex/;
- &repaginate($new_name_file, $latex_file, $numberofcolumns);
- #
- # Now have to re-latex, re dvips again to
- # get the repaginated postscript.
- #
- &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
- "for $status_statement first latex to repaginate",
- \%prog_state, $name_file,$busy_wait_timeout);
- if ($tableofcontents eq 'yes') {
- &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
- "for $status_statement second latex to repaginate",
- \%prog_state, $name_file,$busy_wait_timeout);
- &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
- "for $status_statement third latex to repaginate",
- \%prog_state, $name_file,$busy_wait_timeout);
- }
- if ($tableofindex eq 'yes') {
- my $idxname = $latex_file;
- $idxname =~ s/\.tex$/\.idx/;
- &busy_wait_command("makeindex $idxname",
- "Re-creating index file",
- \%prog_state, $idxname);
- &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
- "for $status_statement now Recreting index (latex)",
- \%prog_state, $dvi_file,$busy_wait_timeout);
+ #Do we have a latex error in the log file?
- }
- &busy_wait_command("$comma $name_file 1>/dev/null 2>/dev/null",
- "for $status_statement dvips to repaginate",
- \%prog_state, $new_name_file);
- #
- # One last little hinky kinky thing.
- # It's just possible that some fonts could not be maded
- # at the resolution of the pdf print driver.
- # In that case a file called missfont.log will have been
- # created that will contain the commands that were attempted
- # to create the missing fonts. If we basically
- # take all the 8000 strings in that file, and
- # replace them with 600 (the ljfour resolution)
- # run the commands in that file and redvips,
- # we'll be able to print the missing glyphs at 600dpi.
- #
- # Supposedly it is possible to tune TeX/Metafont to do this
- # right but I failed to get that to work when following the
- # docs at the tug site, hence this rather kludgey fix.
- #
- # We make the (I think) reasonable assumption that
- # missing glyphs won't change the pagination and I think
- # this is true because TeX/dvips will leave a space
- # instead of these glyphs based on the font metrics
- # (fancy way to say there will be a blank the size of the missing
- # glyphs).
- #
- my $print_directory = dirname($name_file);
- my $missfonts_file = $print_directory."/missfont.log";
- #print("
Missing fonts file is: $missfonts_file");
- if (-e $missfonts_file) {
- #print("
Missing fonts file exists\n");
- &create_missing_fonts($missfonts_file,\%prog_state);
- &busy_wait_command("$comma $name_file 1>/dev/null 2>/dev/null",
- "for $status_statement dvips generated missing fonts",
- \%prog_state, $new_name_file);
- }
- #
- print "\nPDF output file (see link below)
\n";
- $new_name_file =~ m/^(.*)\./;
- my $ps_file = my $tempo_file = $1.'temporar.ps';
- my $pdf_file = $1.'.pdf';
- if ($laystyle eq 'album' and $numberofcolumns eq '2') {
- my $papera=$paper;
- if ($papera eq 'letter') {$papera='';}
- if ($papera ne '') {$papera='-p'.$papera;}
- $comma = "psnup $papera -2 -s1.0 $new_name_file";
- &busy_wait_command("$comma $tempo_file 1>/dev/null 2>/dev/null",
- "for $status_statement now Modifying PS layout",
- \%prog_state,$tempo_file);
- } elsif ($laystyle eq 'book' and $numberofcolumns eq '2') {
- my $papera=$paper;
- if ($papera eq 'letter') {$papera='';}
- if ($papera ne '') {$papera='-p'.$papera;}
- $comma = 'pstops '.$papera.' "2:0+1(0.48w,0)"';
- &busy_wait_command("$comma $new_name_file $tempo_file 1>/dev/null 2>/dev/null",
- "for $status_statement now Modifying PS layout",
- \%prog_state,$tempo_file);
-
- } else {
- $ps_file=$new_name_file;
- }
- &busy_wait_command("ps2pdf $ps_file $pdf_file 1>/dev/null 2>/dev/null",
- "for $status_statement now Converting PS to PDF",
- \%prog_state, $pdf_file);
+ my $logfilename = $texfile; $logfilename =~ s/\.tex$/\.log/;
- my $texlog = $texfile;
- my $texaux = $texfile;
- my $texdvi = $texfile;
- my $texps = $texfile;
- $texlog =~ s/\.tex/\.log/;
- $texaux =~ s/\.tex/\.aux/;
- $texdvi =~ s/\.tex/\.dvi/;
- $texps =~ s/\.tex/\.ps/;
- my @garb = ($texaux,$texdvi,$texps);
-# unlink @garb;
- unlink($duefile);
- print "Your PDF document";
- unlink($missfonts_file);
- }
- if ($advanced_role) {
- print "
";
- print "The link to ";
- $logfilename=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
- print "Your log file ";
- print "\n";
- #link to original LaTeX file
- my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open tex file $texfile for reading: $!\n";
- my @tex_content_of_file = <$tex_temporary_file>;
- close $tex_temporary_file;
- my $body_tex_file = join(' ',@tex_content_of_file);
- $texfile =~ s/\.tex$/aaaaa\.html/;
- $tex_temporary_file = IO::File->new('>'.$texfile);
- print $tex_temporary_file 'LOGFILE'.$body_tex_file.'
'."\n";
- print "
";
- print "The link to ";
- $texfile=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
- print "Your original LaTeX file ";
- print "\n";
- }
+ if (&analyze_logfile($logfilename, $texfile, $advanced_role)) {
+
- } else {
#LaTeX successfully parsed tex file
$name_file =~ s/\.tex/\.dvi/;
my $new_name_file = $name_file;
@@ -597,13 +423,7 @@ foreach $texfile (@texfile) {
# right but I failed to get that to work when following the
# docs at the tug site, hence this rather kludgey fix.
#
- # We make the (I think) reasonable assumption that
- # missing glyphs won't change the pagination and I think
- # this is true because TeX/dvips will leave a space
- # instead of these glyphs based on the font metrics
- # (fancy way to say there will be a blank the size of the missing
- # glyphs).
- #
+
my $print_directory = dirname($name_file);
my $missfonts_file = $print_directory."/missfont.log";
#print("
Missing fonts file is: $missfonts_file");
@@ -618,27 +438,16 @@ foreach $texfile (@texfile) {
my $latex_file = $name_file;
$latex_file =~ s/\.dvi/\.tex/;
&repaginate($new_name_file, $latex_file, $numberofcolumns);
- &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
- "for $status_statement first latex to repaginate",
- \%prog_state, $name_file, $busy_wait_timeout);
- if ($tableofcontents eq 'yes') {
- &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
- "for $status_statement second latex to repaginate",
- \%prog_state, $name_file, $busy_wait_timeout);
- &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
- "for $status_statement third latex to repaginate",
- \%prog_state, $name_file, $busy_wait_timeout);
- }
- if ($tableofindex eq 'yes') {
- my $idxname = $latex_file;
- $idxname =~ s/\.tex$/\.idx/;
- &busy_wait_command("makeindex $idxname",
- "Re-creating index file",
- \%prog_state, $idxname);
- &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
- "for $status_statement now Recreting index (latex)",
- \%prog_state, $dvi_file, $busy_wait_timeout);
- }
+
+ &make_dvi_file($latex_file,
+ $name_file,
+ $tableofcontents,
+ $tableofindex,
+ $status_statement,
+ \%prog_state,
+ $busy_wait_timeout);
+
+
&busy_wait_command("$comma $name_file 1>/dev/null 2>/dev/null",
"for $status_statement dvips to repaginate",
\%prog_state, $new_name_file);
@@ -781,6 +590,66 @@ sub busy_wait_command {
close(CMD);
}
+# Make the dvi file (or rather try to), from the latex file and the
+# various bits and pieces that control how the latex file is processed:
+# LaTeX is run as many times a needed to make this all happen... this may
+# result in several runs of LaTeX that just are errors if the LaTeX is
+# bad, butthe printing subsystem is _supposed_ to not do that.
+#
+# Parameters:
+# name_file - Name of the LaTeX file to process.
+# dvi_file - Name of resulting dvi file.
+# tableofcontents - "yes" if we are supposed to make a table of contents.
+# tableofindex - "yes" if we are suposed to make an index.
+# status_statement - Part of the status statement for ths status window.
+# prog_state - Reference to the program state hash.
+# busy_wait_timeout- Seconds without any progress that imply a problem.
+#
+#
+sub make_dvi_file {
+ my ($name_file,
+ $dvi_file,
+ $tableofcontents,
+ $tableofindex,
+ $status_statement,
+ $prog_state,
+ $busy_wait_timeout) = @_;
+
+
+ &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
+ "for $status_statement now LaTeXing file",
+ $prog_state,$dvi_file, $busy_wait_timeout);
+
+ # If the tableof contents was requested, we need to run
+ # LaTex a couple more times to get all the references sorted out.
+
+ if ($tableofcontents eq 'yes') {
+ &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
+ "for $status_statement First LaTeX of file for table of contents",
+ $prog_state,$dvi_file, $busy_wait_timeout);
+ &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
+ "for $status_statement Second LaTeX of file for table of contents",
+ $prog_state,$dvi_file,$busy_wait_timeout);
+ }
+
+ # And makeindex and another run of LaTeX to incorporate it if the index
+ # is enabled.
+
+
+ if ($tableofindex eq 'yes') {
+ my $idxname=$name_file;
+ $idxname=~s/\.tex$/\.idx/;
+ &busy_wait_command("makeindex $idxname",
+ "making index file",
+ $prog_state,$idxname);
+ &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
+ "for $status_statement now LaTeXing file for index section",
+ $prog_state,$dvi_file, $busy_wait_timeout);
+ }
+
+}
+
+
# Repagninate
# What we need to do:
# - Count the number of pages in each student.
@@ -1053,3 +922,159 @@ sub convert_figure {
}
}
+#
+# Analyze a LaTeX logfile producing appropriate output on error and
+# returning a boolean to let the caller know if, in our opinion, it's
+# worth continuing on to produce the PDF file.
+#
+# Parameters:
+# logfilename - Name of the logfile.
+# texfile - Name of the LaTeX file that was being processed.
+# advanced_role - True if the user is privileged with respect to the printout
+# (e.g. is the course coordinator or some such thing).
+# Returns:
+# 1 - Caller is advised to continue to create the PDF.
+# 0 - Caller need not bother creating the PDF.
+# Side Effects:
+# Messages are printed to describe any errors that have been encountered.
+# NOTE:
+# The current policy is to assume that if LaTeX decided to insert some text
+# it has salvaged the resource and the resource can be printed.. in that case
+# a message is emitted from this sub.
+#
+sub analyze_logfile {
+ my ($logfilename, $texfile, $advanced_role) = @_;
+
+ my $temporary_file=IO::File->new($logfilename) || die "Couldn't open log file $logfilename for reading: $!\n";
+ my @content_of_file = <$temporary_file>;
+ close $temporary_file;
+ my $body_log_file = join(' ',@content_of_file);
+ $logfilename =~ s/\.log$/\.html/;
+ $temporary_file = IO::File->new('>'.$logfilename);
+ print $temporary_file 'LOGFILE'.$body_log_file.'
'."\n";
+ if ($body_log_file=~m/!\s+Emergency stop/) {
+ my $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART';
+ my $whereitends = rindex $body_log_file,'STAMPOFPASSEDRESOURCEEND';
+ my $badresource;
+ my $badtext;
+ if ($whereitbegins!=-1 and $whereitends!=-1) {
+ $badtext = substr($body_log_file,$whereitbegins+26, $whereitends-$whereitbegins-26);
+ $whereitbegins = rindex $badtext,'located in';
+ if ($whereitbegins != -1) {
+
+ $badresource = substr($badtext, $whereitbegins+27,
+ length($badtext) - $whereitbegins - 48);
+ # print "
failing resourcename: $badresource
";
+ }
+ }
+
+ # Guys with privileged roles get a more detailed error output:
+
+ if ($advanced_role) {
+ #LaTeX failed to parse tex file
+ print "LaTeX could not successfully parse your tex file.
";
+ print "It probably has errors in it.
";
+ print "With very high probability this error occured in ".$badtext."
";
+ print "Here are the error messages in the LaTeX log file
";
+
+ my $sygnal = 0;
+ for (my $i=0;$i<=$#content_of_file;$i++) {
+ if ($content_of_file[$i]=~m/^Runaway argument?/ or $content_of_file[$i]=~m/^!/) {
+ $sygnal = 1;
+ }
+ if ($content_of_file[$i]=~m/Here is how much of/) {
+ $sygnal = 0;
+ }
+ if ($sygnal) {
+ print "$content_of_file[$i]";
+ }
+ }
+ print "\n";
+ # print "
Advanced role
";
+ print "The link to ";
+ $logfilename=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
+ print "Your log file ";
+ print "\n";
+ #link to original LaTeX file
+ my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open tex file $texfile for reading: $!\n";
+ my @tex_content_of_file = <$tex_temporary_file>;
+ close $tex_temporary_file;
+ my $body_tex_file = join(' ',@tex_content_of_file);
+ $texfile =~ s/\.tex$/aaaaa\.html/;
+ $tex_temporary_file = IO::File->new('>'.$texfile);
+ print $tex_temporary_file 'LOGFILE'.$body_tex_file.'
'."\n";
+ print "
";
+ print "The link to ";
+ $texfile=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
+ print "Your original LaTeX file ";
+ print "\n";
+ my $help_text = &Apache::loncommon::help_open_topic("Print_Resource", "Help on printing");
+ print ("$help_text");
+
+ # Students on the other hand get a minimal error message, since they won't
+ # be able to correct the error message. A message is sent to the
+ # instructor:
+
+ } else { # Student role...
+ # at this point:
+ # $body_log_file - contains the log file.
+ # $name_file - is the name of the LaTeX file.
+ # $identifier - is the unique LaTeX identifier.l
+
+ print "
There are errors in $badtext";
+ print "
These errors prevent this resource from printing correctly";
+ my $tex_handle = IO::File->new($texfile);
+ my @tex_contents = <$tex_handle>;
+ &send_error_mail($identifier, $badresource, $body_log_file, \@tex_contents);
+ print "
A message has been sent to the instructor describing this failure
";
+ my $help_text = &Apache::loncommon::help_open_topic("Print_Resource", "Help on printing");
+ print ("$help_text");
+
+ }
+
+ # Either way, an emergency stop does not allow us to continue so:
+
+ return 0;
+
+ # The branch of code below is taken if it appears that
+ # there was no emergency stop but LaTeX had to correct the
+ # input file to run.
+ # In that case we need to provide error feedback, as the correction >may< not be
+ # sufficient, we can let the game continue as there's a dvi file to process.
+
+ } elsif ($body_log_file=~m//) {
+ my $whereitbegins = index $body_log_file,'';
+ print "You are running LaTeX in batch mode.";
+ while ($whereitbegins != -1) {
+ my $tempobegin=$whereitbegins;
+ $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART',$whereitbegins;
+ my $whereitends = index $body_log_file,'STAMPOFPASSEDRESOURCEEND',$whereitbegins;
+ print "
It has found an error in".substr($body_log_file,$whereitbegins+26,$whereitends-$whereitbegins-26)."
and corrected it.\n";
+ 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";
+ $whereitbegins = index $body_log_file,'',$tempobegin+10;
+ }
+
+ if ($advanced_role) {
+ print "
";
+ print "The link to ";
+ $logfilename=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
+ print "Your log file ";
+ print "\n";
+ #link to original LaTeX file
+ my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open tex file $texfile for reading: $!\n";
+ my @tex_content_of_file = <$tex_temporary_file>;
+ close $tex_temporary_file;
+ my $body_tex_file = join(' ',@tex_content_of_file);
+ $texfile =~ s/\.tex$/aaaaa\.html/;
+ $tex_temporary_file = IO::File->new('>'.$texfile);
+ print $tex_temporary_file 'LOGFILE'.$body_tex_file.'
'."\n";
+ print "
";
+ print "The link to ";
+ $texfile=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
+ print "Your original LaTeX file ";
+ print "\n";
+ }
+ return 1;
+ }
+ return 1; # NO log file issues at all.
+}