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Revision 1351 - (download) (as text) (annotate)
Fri Jul 11 16:30:04 2003 UTC (16 years, 7 months ago) by apizer
File size: 36049 byte(s)
incorporate some of davide Cervone'e changes

Arnie

    1 
    2 
    3 use strict;
    4 
    5 ## $ENV{'PATH'} .= ':/usr/math/bin';
    6 
    7 my $debug = 0;
    8 $debug = 1 if $Global::imageDebugMode;
    9     ## if $debug =1, log, etc. files created by
   10                   ## latex2html are not deleted
   11 
   12 ##############################################################
   13 #  File: DisplayMacros.pl
   14 #  This contains the subroutines for  creating problem files
   15 ##############################################################
   16 
   17 ################################################################
   18 #  Copyright @1995-1998 by Michael E. Gage, Arnold K. Pizer and
   19 #  WeBWorK at the University of Rochester. All rights reserved.
   20 ################################################################
   21 
   22 
   23 ## To add or delete displayModes edit this file
   24 
   25 sub displaySelectModeLine_string
   26                   # called from probSet.pl
   27                   # displays the option line for selecting display modes
   28 {
   29    my ($displayMode) =@_ ;
   30    my $out = "Display Mode: <BR>";
   31 
   32 # A list of the available modes.
   33   my $mode_list = $Global::available_mode_list; ## ref to a list of available modes
   34                                   ## The format is [internal symbol, external name]
   35 # A list of the available modes.
   36 # Format is [internal symbol, external name, ""], where the third
   37 # argument is changed to checked below for the current displayMode
   38 #   my $mode_list = [
   39 # ['HTML', 'text', ""],
   40 # ['HTML_tth', 'formatted-text',""],
   41 # ['HTML_dpng' ,'dvipng',""],
   42 # ['Latex2HTML', 'typeset',""]
   43 # ];
   44 
   45 # Make the format [internal symbol, external name, '']
   46 # The third argument is changed to checked below for the current displayMode
   47   my $j;
   48   for $j (0..(scalar(@{$mode_list})-1)) {
   49     push @{$mode_list->[$j]},'';
   50   }
   51 
   52    if (! defined($displayMode) ) {$displayMode = $Global::htmldisplayModeDefault;}
   53 
   54 
   55    my $found = 0;
   56 # Search through all modes to match for displayMode
   57 # If we don't find one, found=0 will trigger warn message below
   58    for $j (0..(scalar(@{$mode_list})-1)) {
   59      if($mode_list->[$j]->[0] eq $displayMode) {
   60         $mode_list->[$j]->[2] = "CHECKED";
   61         $found=1;
   62         last;
   63      }
   64    }
   65 
   66    for $j (@{$mode_list}) {
   67      $out .= qq!<INPUT TYPE=RADIO NAME="Mode" VALUE="$j->[0]" $j->[2]>$j->[1]<BR>\n!;
   68    }
   69    if(! $found) {
   70      my $wstr = " Error: displayMacros.pl: sub displaySelectModeLine. Unrecognized mode |$displayMode| .  The acceptable modes are: ";
   71      for $j (@{$mode_list}) {
   72        $wstr .= " $j->[0] ";
   73      }
   74      warn $wstr;
   75    }
   76   $out;
   77 }
   78 
   79 sub displaySelectModeLine {
   80   print displaySelectModeLine_string(@_);
   81 }
   82 ##################################################################################################################
   83 # Does the initial processing of the problem.
   84 # Returns an array containing the rendered problem.         #
   85 ##################################################################################################################
   86 
   87 sub createDisplayedProblem  {
   88 
   89    my ($setNumber,$probNum,$psvn,$printlinesref,$rh_flags)= @_;
   90    my @printlines;
   91 
   92 
   93       my $coursel2hDirectory = getCoursel2hDirectory();
   94       unless(-e $coursel2hDirectory ) {
   95           &createDirectory($coursel2hDirectory, $Global::l2h_set_directory_permission,
   96             $Global::numericalGroupID);
   97       }
   98 
   99       unless(-e "${coursel2hDirectory}set$setNumber") {
  100       &createDirectory("${coursel2hDirectory}set$setNumber",$Global::l2h_set_directory_permission,
  101         $Global::numericalGroupID);
  102       }
  103 
  104 
  105     my $PROBDIR = convertPath("${coursel2hDirectory}set$setNumber/$probNum-$psvn/");
  106     my $TMPPROBDIR = convertPath("${coursel2hDirectory}$probNum-$psvn/");
  107 
  108       if (! -e $PROBDIR) {  # no gifs of equations have been created
  109           &l2hcreate($setNumber,$probNum,$psvn,$printlinesref);
  110 
  111       } else {  # determine if the gifs are older than the modifications of the source file
  112                 #&attachProbSetRecord($psvn);
  113           my $fileName = &getProblemFileName($probNum,$psvn);
  114           $fileName = "${Global::templateDirectory}$fileName";
  115                   #print "\n\n The filename is $fileName \n\n";
  116           my @probDirStat = stat $PROBDIR;
  117           my @sourceFileStat = stat $fileName;
  118                   #print "\n\n The source file age is $sourceFileStat[9] \n\n";
  119                   #print "\n\n The prob dir age is $probDirStat[9] \n\n";
  120 
  121           if (($sourceFileStat[9] > $probDirStat[9] ) or
  122                              $rh_flags->{'refreshCachedImages'}) {
  123                   ## source file is newer or solutions should be shown recreate the l2h cache
  124                 rmDirectoryAndFiles($PROBDIR);
  125                 &l2hcreate($setNumber,$probNum,$psvn,$printlinesref);
  126           }
  127 
  128 
  129       }
  130       #the problem has been rendered by Latex2HTML into this file:
  131 #      open(TEXXX, "${PROBDIR}${psvn}output.html") || die "Can't open ${PROBDIR}${psvn}output.html";
  132       open(TEXXX, "${PROBDIR}${psvn}output.html") or
  133                warn "ERROR: $0".
  134                "Can't open the HTML file: \n ${PROBDIR}${psvn}output.html\n(allegedly)".
  135                 "translated by latex2HTML\n at displayMacros.pl, line" . __LINE__ ;
  136 
  137       @printlines = <TEXXX>;
  138       push(@printlines, "The file ${PROBDIR}${psvn}output.html was empty") unless @printlines;
  139       #print "PRINTLINES",@printlines;
  140       close(TEXXX);
  141 
  142    @printlines;
  143 }
  144 
  145 
  146 
  147 ###########################################################################################
  148 # Formats and displays the responses to submitted answers to the problem.  Returns a string.          #
  149 ###########################################################################################
  150 
  151 sub display_answers {     # this will be put in displayMacros.pl soon.
  152   #my ($displayCorrectAnswersQ,$showPartialCorrectAnswers,$rh_answer_results,$rh_problem_result)  = @_;
  153     my  ($rh_answer_results,$rh_problem_result,$rh_flags)  = @_;
  154     my $displayCorrectAnswersQ = $rh_flags ->{displayCorrectAnswersQ};
  155     my $showPartialCorrectAnswers = $rh_flags -> {showPartialCorrectAnswers};
  156     my @answer_entry_order = @{$rh_flags -> {ANSWER_ENTRY_ORDER} };
  157     my $ANSWER_PREFIX = $rh_flags -> {ANSWER_PREFIX};
  158   my  $allAnswersCorrectQ = 1;
  159   my  $printedResponse='';
  160   ###### Print appropriate response to submitted answers
  161       my ($i,$answerIsCorrectQ, $normalizedSubmittedAnswer,$normalizedCorrectAnswer,$ans_name,$errors);
  162       $i=0;
  163 #     $printedResponse .= "\n<table border=0 cellpadding=0 cellspacing=0  bgcolor=\"#cccccc\">\n";
  164 # replace above line by next two lines as per Davide Cervone. AKP.
  165       $printedResponse .= "\n<table border=0 cellpadding=7 cellspacing=0 bgcolor=\"#cccccc\">\n";
  166       $printedResponse .= "<tr><td><table border=0 cellpadding=0 cellspacing=0>\n";
  167       foreach my $key ( @answer_entry_order ) {
  168 
  169       $i++;
  170       $answerIsCorrectQ = $rh_answer_results ->{$key} -> {score};
  171       $normalizedSubmittedAnswer = $rh_answer_results ->{$key} -> {student_ans};
  172       $normalizedSubmittedAnswer = '' if ($normalizedSubmittedAnswer =~ /^error:\s+empty/);
  173       $normalizedCorrectAnswer = $rh_answer_results ->{$key} -> {original_correct_ans};
  174 
  175         ##  Handle the case where the answer evaluator does not return original_correct_ans
  176       if ((!defined $normalizedCorrectAnswer) or (!$normalizedCorrectAnswer =~ /\S/)) {
  177         $normalizedCorrectAnswer = $rh_answer_results ->{$key} -> {correct_ans};
  178       }
  179 
  180       $errors = $rh_answer_results ->{$key} -> {ans_message};
  181       $errors = '' if ($errors eq 'empty');
  182       #$ans_name = $rh_answer_results ->{$key} -> {ans_name};
  183       #$ans_name =~ s/$ANSWER_PREFIX//;    # this handles implicitly defined answer names.
  184       $ans_name = $i;  # just number the answers in order
  185         $allAnswersCorrectQ = $allAnswersCorrectQ && $answerIsCorrectQ;
  186       $printedResponse .= "\n<TR><TD align=left COLSPAN =2><em>Answer $ans_name entered:</em>--&gt; $normalizedSubmittedAnswer &lt;-- ";
  187         $printedResponse .=  "<B>Correct. </B></TD></TR>"   if  ($answerIsCorrectQ && $showPartialCorrectAnswers );
  188         $printedResponse .=  "<B>Incorrect. </B></TD></TR>" if (!($answerIsCorrectQ) && $showPartialCorrectAnswers);
  189       $errors =~ s/\n/<BR>/g;  ## convert newlines to <BR> in error messages as per Davide Cervone
  190             # change 9/2/00 by MEG -- give width in pixels rather than %.
  191             # Some browsers break with %  widht which is not the standard
  192       $printedResponse .=  "\n<TR> <TD align=left WIDTH = \"50\" >&nbsp;</TD><TD align=left>$errors</TD></TR>" if ($errors =~ /\w/);
  193 
  194       $printedResponse .= "\n<TR><TD align=left WIDTH = \"50\">&nbsp;</TD>              <TD align=left><em>Correct answer:</em> $normalizedCorrectAnswer</TD></TR>" if ($displayCorrectAnswersQ);
  195 
  196       }
  197       if ($i == 1) {
  198           $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>The above answer is correct.</B><BR>" if ($allAnswersCorrectQ);
  199           $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>The above answer is NOT correct.</B><BR>" if (!($allAnswersCorrectQ));
  200       }
  201       else {
  202           $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>All of the above answers are correct.</B><BR>" if ($allAnswersCorrectQ);
  203           $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>At least one of the above answers is NOT correct.</B><BR>" if (!($allAnswersCorrectQ));
  204       }
  205         my $percentCorr = int(100*$rh_problem_result->{score} +.5);
  206 
  207     $printedResponse .="\n<TR><TD align=left COLSPAN =2><B>Your score on this attempt is ${percentCorr}\%.</B><BR>";
  208 #   $printedResponse .= "\n</table>\n";
  209 # replace above line by next line as per Davide Cervone. AKP.
  210     $printedResponse .= "</td></tr>\n</table>\n</table>\n";
  211 #      $printedResponse .="\n problem grader is ".$rh_problem_result->{type}." and the score is ".$rh_problem_result->{score}."<BR>\n";
  212     $printedResponse;
  213 }
  214 
  215 ###########################################################################################
  216 # Previews submitted answers to the problem.  Returns a string.           #
  217 ###########################################################################################
  218 
  219 sub preview_answers {
  220     my  ($rh_answer_results,$rh_problem_result,$rh_flags)  = @_;
  221     my @answer_entry_order = @{$rh_flags -> {ANSWER_ENTRY_ORDER} };
  222     my $ANSWER_PREFIX = $rh_flags -> {ANSWER_PREFIX};
  223     my $printedResponse ='';
  224   ###### Print appropriate response to submitted answers
  225       my ($i,$original_student_ans,$normalizedSubmittedAnswer,$errors,$ans_name,$preview_text_string,$preview_latex_string);
  226         my ($ans_evaluator_type, $value_word, $error_word, $show_value);
  227 
  228       $i=0;
  229       $printedResponse .= "\n<table border=0 cellpadding=0 cellspacing=0  >\n";
  230       foreach my $key ( @answer_entry_order ) {
  231     $i++;
  232     $ans_name = $rh_answer_results ->{$key} -> {ans_name};
  233     #$ans_name =~ s/$ANSWER_PREFIX//;    # this handles implicitly defined answer names.  #commented out by DME 6/6/2000
  234     $original_student_ans = $rh_answer_results ->{$key} -> {original_student_ans};
  235     $normalizedSubmittedAnswer = $rh_answer_results ->{$key} -> {student_ans};
  236     $errors = $rh_answer_results ->{$key} -> {ans_message};
  237     $errors =~ s/\n/<BR>/g;  ## convert newlines to <BR> in error messages as per Davide Cervone
  238     $preview_text_string ='';
  239     $preview_text_string = $rh_answer_results ->{$key} -> {preview_text_string}
  240       if defined $rh_answer_results ->{$key} -> {preview_text_string};
  241     $preview_latex_string ='';
  242     $preview_latex_string = $rh_answer_results ->{$key} -> {preview_latex_string}
  243       if defined $rh_answer_results ->{$key} -> {preview_latex_string};
  244     $ans_evaluator_type = $rh_answer_results ->{$key} -> {type};
  245     $value_word = 'value:';
  246     $show_value = 0;
  247     $show_value = 1 if ((($ans_evaluator_type =~ /number/) and ($normalizedSubmittedAnswer =~ /\w/)) or ($normalizedSubmittedAnswer =~ /^error/));
  248     $show_value = 0 if ($normalizedSubmittedAnswer =~ /^error:\s+empty/);
  249     $value_word = '' if ($normalizedSubmittedAnswer =~ /^error/);
  250     $error_word = 'error:';
  251     $error_word = '' if ($errors =~ /^error:/);
  252     $printedResponse .= "\n<TR><TD align=left>Ans $i </TD>";
  253     #$printedResponse .= "\n<TD align=left><INPUT TYPE=\"text\" NAME=\"${ANSWER_PREFIX}${ans_name}\"  VALUE=\"$original_student_ans\" SIZE=70></TD></TR>";  #commented out by DME 6/6/2000
  254     $printedResponse .= "\n<TD align=left><INPUT TYPE=\"text\" NAME=\"${ans_name}\"  VALUE=\"$original_student_ans\" SIZE=70></TD></TR>";
  255     $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>parsed: $preview_text_string</TD></TR>" if ($preview_text_string =~ /\w/);
  256     $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>${value_word} $normalizedSubmittedAnswer</TD></TR>" if $show_value == 1;
  257     $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>${error_word} $errors</TD></TR>" if (($errors =~ /\w/) and ($errors ne 'empty')) ;
  258     if ($preview_latex_string =~ /\w/) {
  259       $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>";
  260       $printedResponse .= "\n <APPLET CODE=\"HotEqn.class\" HEIGHT=\"80\" WIDTH=\"500\" ARCHIVE=\"HotEqn.zip\" NAME=\"Equation\" ALIGN=\"middle\" CODEBASE=\"$Global::appletsURL\"> ";
  261       $printedResponse .= "\n <PARAM NAME=\"equation\" VALUE=\"$preview_latex_string\"></APPLET></TD></TR> ";
  262     }
  263     $printedResponse .= "\n<TR Height = 5></TR>";
  264       }
  265 
  266     $printedResponse .= "\n</table>\n";
  267     $printedResponse;
  268 }
  269 
  270 
  271 sub lc_sort {  # this sorts strings with letters and number groups, alternately lexigraphically and numerically
  272                # (lc stands for library of congress as in QA617.34R45)
  273     my($left,$right) = @_;
  274     # format  "abcd345.57def34ABC";
  275     # string assumed to begin with alpha
  276     # string is split into alternating alpha and numeric groups
  277     # numeric groups match [\d\.]+
  278     # numeric groups assumed to contain at least one digit, ( a period alone will cause and error)
  279     # alpha groups can contain any characters except digits and the period
  280     # spaces in alpha groups will cause unexpected behavior
  281     # sort is not case sensitive
  282     # _ sorts after alpha characters
  283 
  284     # not case sensitive
  285 
  286     my @a = split( /([\d\.]+)/, $left);
  287 
  288     my @b = split( /([\d\.]+)/, $right);
  289 
  290     my $out = undef;
  291     my $mode = 0;  # even is lexic and odd is numeric
  292     my($l,$r);
  293     while (@a) {
  294     $l = shift @a;
  295     $r = shift @b;
  296     $out = ($mode++ % 2 == 0) ? uc($l) cmp uc($r) : $l <=> $r;  # lexic or numeric compare
  297     last unless $out==0;   # stop unless $l and $r are different.
  298 
  299     }
  300    $out;
  301 }
  302 
  303 #####################################################################
  304 # Creates an insert which appears on the probSet page.              #
  305 #####################################################################
  306 sub createDisplayedInsert
  307 {
  308    #my ($mode,$setNumber,$fileName,$psvn,$courseName,$printlinesref)= @_;
  309    my ($setNumber,$fileName,$psvn,$courseName,$printlinesref)= @_;
  310 
  311    my @printlines=@$printlinesref;
  312    my $PROBDIR;
  313 
  314 #   if($mode eq "HTML" || $mode eq 'HTML_tth') {
  315 #       @printlines = &createProblem2($mode,$fileName,$psvn,$courseName,$sourceref);
  316 #
  317 #   } elsif ($mode eq 'Latex2HTML')  {
  318      #latex2html processing
  319       my $coursel2hDirectory = getCoursel2hDirectory();
  320       unless(-e $coursel2hDirectory ) {
  321           &createDirectory($coursel2hDirectory, $Global::l2h_set_directory_permission,
  322             $Global::numericalGroupID);
  323       }
  324 
  325       unless(-e "${coursel2hDirectory}set$setNumber") {
  326       &createDirectory("${coursel2hDirectory}set$setNumber",$Global::l2h_set_directory_permission,
  327         $Global::numericalGroupID);
  328       }
  329 
  330   my $shortFileName = $fileName;
  331   $shortFileName =~ s|^.*?([^\/]*)$|$1|;
  332   $shortFileName =~ s|\..*$||;
  333   $PROBDIR = convertPath("${coursel2hDirectory}set$setNumber/$shortFileName-$psvn/");
  334   if (! -e $PROBDIR) {
  335     &l2hcreate($setNumber,$shortFileName,$psvn,$printlinesref);
  336   } else  {
  337     #&attachProbSetRecord($psvn);
  338           my $fullFileName = "${Global::templateDirectory}$fileName";
  339           #print "\n\n The  full filename is $fullFileName \n\n";
  340           my @probDirStat = stat $PROBDIR;
  341           my @sourceFileStat = stat $fullFileName;
  342           #print "\n\n The source file age is $sourceFileStat[9] \n\n";
  343           #print "\n\n The prob dir age is $probDirStat[9] \n\n";
  344           if ($sourceFileStat[9] > $probDirStat[9] )  { ## source file is newer
  345             rmDirectoryAndFiles($PROBDIR);
  346                 &l2hcreate($setNumber,$shortFileName,$psvn,$printlinesref);
  347           }
  348            #else {&createProblem2($mode, $fileName, $psvn,$courseName,$sourceref);}   ##initialize problem
  349 
  350   }
  351 
  352 
  353       open(TEXXX, "${PROBDIR}${psvn}output.html") or
  354         wwerror("ERROR: $0", "Can't open ${PROBDIR}${psvn}output.html",'','', '');
  355       @printlines = <TEXXX>;
  356       close(TEXXX);
  357 #   } else  {
  358 #
  359 #       @printlines="createDisplayedProblem: Error:  Mode is not HTML, HTML_tthHTML_tth or Latex2HTML.";
  360 #
  361 #
  362 #   }
  363    @printlines;
  364 }
  365 
  366 ##do not need this subroutine anymore
  367 #sub l2hcreateProb {
  368 #   my ($setNumber,$probNum,$psvn,$printlinesref)= @_;
  369 #   #my ($setNumber,$probNum,$psvn,$courseName,$printlinesref)= @_;
  370 #   #my $mode = 'Latex2HTML';
  371 #
  372 #   #my @printlines = &createProblem($mode, $probNum, $psvn, $courseName,$sourceref,$refSubmittedAnswers);
  373 #   #my $printlinesref = \@printlines;
  374 #   my $tmpDirectory = "tmp/l2h/set$setNumber/$probNum-$psvn/";
  375 #   l2hcreate($setNumber,$probNum,$psvn,$printlinesref)
  376 #}
  377 
  378 #do not use this subroutine anymore
  379 #sub l2hcreateInsert {
  380 #   my ($setNumber,$shortFileName,$psvn,$printlinesref)= @_;
  381 #   #my $mode = 'Latex2HTML';
  382 #   #my @printlines = &createProblem2($mode, $fileName, $psvn,$courseName,$sourceref);
  383 #   #my $printlinesref = \@printlines;
  384 #   #my $shortFileName = $fileName;
  385 #   #$shortFileName =~ s|^.*?([^\/]*)$|$1|;
  386 #   #my $tmpDirectory = "tmp/l2h/set$setNumber/$shortFileName-$psvn/";
  387 #   l2hcreate($setNumber,$shortFileName,$psvn,$printlinesref)
  388 #}
  389 
  390 sub l2hcreate {     ## for latex2HTML 96.1 and 98.1
  391    my ($setNumber,$probNum,$psvn,$printlinesref) = @_;
  392 
  393    # warn "l2hcreate is being executed displaymacros.pl line ".__LINE__;
  394 
  395    my $PROBDIR = convertPath(&getCoursel2hDirectory."set$setNumber/$probNum-$psvn/");
  396    my $TMPPROBDIR = convertPath(&getCoursel2hDirectory."$probNum-$psvn/");
  397    my $PROBURL = &getCoursel2hURL."set$setNumber/$probNum-$psvn/";
  398 
  399    &createDirectory($TMPPROBDIR,$Global::l2h_prob_directory_permission,$Global::numericalGroupID)
  400      unless(-e "$TMPPROBDIR");
  401 
  402    open(OUTTEXFILE, ">$TMPPROBDIR${psvn}output.tex") or wwerror($0, "Can't open temporary file $TMPPROBDIR${psvn}output.tex");
  403 
  404    print OUTTEXFILE &texInput($Global::TEX_PROB_PREAMBLE);
  405    print OUTTEXFILE &texInput($Global::TEX_PROB_HEADER);
  406    print OUTTEXFILE @$printlinesref;
  407    print OUTTEXFILE &texInput($Global::TEX_PROB_FOOTER);
  408    close(OUTTEXFILE);
  409 
  410    ## Give this temporary file permission 666 in case the process dies before it it deleted 60 lines further down
  411    chmod(0666, "$TMPPROBDIR${psvn}output.tex");
  412 
  413                   ##  system("/usr/math/bin/latex2html -init_file ${Global::mainDirectory}latex2html.init -dir $PROBDIR -prefix $psvn ${htmlDirectory}tmp/l2h/${psvn}output.tex > ${htmlDirectory}tmp/l2h/${psvn}l2h.log");
  414    my $latex2HTML_result = &makeL2H($TMPPROBDIR, $psvn) ;
  415    warn( "LaTeX2HTML failed. Returned with status: $latex2HTML_result\n" ) if $latex2HTML_result ;
  416 
  417    ##Get rid of all unwanted stuff in html document created by latex2html
  418    unless(-e "${TMPPROBDIR}${psvn}output.html") {
  419         warn "Can't rename ${TMPPROBDIR}${psvn}output.html";
  420         return (0);  ### there was a failure in latex2html processing
  421                      ### we just give a warning so that so that l2hPrecreateSet.pl can continue
  422    }
  423 
  424    rename("${TMPPROBDIR}${psvn}output.html","${TMPPROBDIR}${psvn}output.html.org") or
  425      warn "Can't rename ${TMPPROBDIR}${psvn}output.html at ". __LINE__;
  426    open(TEXORG, "${TMPPROBDIR}${psvn}output.html.org") or
  427      warn "Can't open ${TMPPROBDIR}${psvn}output.html.org";
  428    my @l2hOutputArray;
  429 
  430 
  431 
  432 
  433    BLK: {  # This is protection to make absolutely sure that the line separater is set properly.
  434            # It's still a mystery as to where this becomes defined to be something else.
  435      local($/);
  436      $/ = "\n";
  437      @l2hOutputArray = <TEXORG>;
  438 
  439 
  440    }
  441 
  442    close(TEXORG);
  443    open(TEXNEW, ">${TMPPROBDIR}${psvn}output.html") or
  444      wwerror($0, "Can't open ${TMPPROBDIR}${psvn}output.html",'','', '');
  445 
  446 
  447     foreach (@l2hOutputArray) {
  448         if($_ =~ /^<META/) {next;}
  449         if($_ =~ /^<!DOCTYPE HTML PUBLIC/) {next;}
  450         if($_ =~ /^<HTML>/) {next;}
  451         if($_ =~ /^<HEAD>/) {next;}
  452         if($_ =~ /^<TITLE>/) {next;}
  453         if($_ =~ /^<LINK REL/) {next;}
  454         if($_ =~ /^<\/HEAD>/) {next;}
  455         if($_ =~ /^<BODY/) {next;}
  456         if($_ =~ /^<\/BODY>/) {next;}
  457         if($_ =~ /^<\/HTML>/) {next;}
  458         if($_ =~ /^<BR> <HR>/) {next;}
  459 
  460         print TEXNEW ;
  461     }
  462 
  463 
  464     close(TEXNEW);
  465 
  466          ## Now do global multiline changes on whole file
  467 
  468     open(TEXNEW, "${TMPPROBDIR}${psvn}output.html") or
  469      wwerror("$0", "Can't open ${TMPPROBDIR}${psvn}output.html",'','', '');
  470     @l2hOutputArray = <TEXNEW>;
  471     close(TEXNEW);
  472     my $l2hOutputString = join('',@l2hOutputArray);
  473 
  474                ## make gif images created by latex2html locatable by server
  475                ## NOTE: $htmlURL is defined in webworkCourse.ph . Often this will
  476                ## will be a link appearing in a public_html_docs directory.
  477                ## The $htmlURL, any links, and the next line must be coordinated.
  478 
  479     $l2hOutputString =~ s|${psvn}img|${PROBURL}${psvn}img|g;
  480 
  481                  ## remove multiline comments
  482     $l2hOutputString =~ s|<!--.*?-->\n||sg;
  483 
  484     open(TEXNEW, ">${TMPPROBDIR}${psvn}output.html") or
  485      wwerror("$0", "Can't open ${TMPPROBDIR}${psvn}output.html",'','', '');
  486     print TEXNEW $l2hOutputString;
  487     close(TEXNEW);
  488 
  489                ## remove unneeded files
  490 
  491     unless ($debug) {unlink("${TMPPROBDIR}${psvn}output.html.org");}
  492     unless ($debug) {unlink(<${TMPPROBDIR}*images.*>);}
  493     unless ($debug) {unlink(<${TMPPROBDIR}.*.db>);}
  494     unless ($debug) {unlink(<${TMPPROBDIR}*.db>);}
  495     unless ($debug) {unlink(<${TMPPROBDIR}IMG_PARAMS.*>);}
  496     unless ($debug) {unlink(<${TMPPROBDIR}*.pl>);}
  497     unless ($debug) {unlink(<${TMPPROBDIR}*.css>);}
  498     unless ($debug) {unlink("${TMPPROBDIR}index.html");}
  499     unless ($debug) {unlink("${TMPPROBDIR}${psvn}output.tex");}
  500     unless ($debug) {unlink("${TMPPROBDIR}${psvn}l2h.log");}
  501     unless ($debug) {
  502         my @allfiles = ();
  503         opendir( DIRHANDLE, "$TMPPROBDIR") || warn qq/Can't read directory $TMPPROBDIR $!/;
  504         @allfiles = map "$TMPPROBDIR$_", grep( /^l2h/, readdir DIRHANDLE);
  505         closedir(DIRHANDLE);
  506         my $l2hTempDir = $allfiles[0];
  507         if (defined $l2hTempDir)  {
  508             unlink(<$l2hTempDir/*>);
  509             rmdir ($l2hTempDir);
  510         }
  511     }
  512 
  513                ## change permission and group on remaining files
  514     chmod($Global::l2h_data_permission, glob("${TMPPROBDIR}*"));
  515     chown(-1,$Global::numericalGroupID,glob("${TMPPROBDIR}*"));
  516 
  517     ## Now that all the processing has been done, rename the $TMPPROBDIR TO $PROBDIR
  518 
  519      rename("$TMPPROBDIR","$PROBDIR") or
  520     warn "Can't rename the temporary problem directory:\n $TMPPROBDIR to $PROBDIR\n at displayMacros.pl , line: " . __LINE__ ;
  521 
  522 }
  523 
  524 
  525 #########################################################################################################
  526 ##Subroutine that makes answers sticky in l2h mode                            #
  527 #                                                   #
  528 # INPUT:    $rh_submittedAnswers  Reference to a hash containing the answers submitted      #
  529 #         $ra_printLines      Reference to an array containing the (HTML) text to be output #
  530 #         $rh_flags       Reference to a hash containing flags; specifically a      #
  531 #                       reference to an array containing the answer field labels  #
  532 #                                                     #
  533 # OUTPUT:   @printLines       An array containing the (modified) text to be output      #
  534 #                                                     #
  535 # OVERVIEW:   l2h_sticky_answers is given HTML text, a list of submitted answers, and a list of   #
  536 #         answer field labels. Its job is to retain the user's answers between submissions    #
  537 #         when in typeset mode (this is handled elsewhere in the text modes). Basically, its    #
  538 #         job is to act as a "filter" for the HTML text, replacing the answer fields that have  #
  539 #         been reset with fields containing the previously entered answers, returning the     #
  540 #         modified text. A brief high-level overview of the algorithm follows:          #
  541 #                                                     #
  542 # ALGORITHM:  The references are first dereferenced. The incoming text is first joined into     #
  543 #         one string. It is then split up again, but not by line. Rather, the text is split   #
  544 #         such that each array entry is either text which can be ignored, or a single       #
  545 #         <INPUT...> tag. Each entry is then processed. If it is an <INPUT> tag, then it      #
  546 #         must be checked for the presence of each answer field label for which a value was   #
  547 #       submitted (there are many <INPUT> fields which are not answer fields, so we can't   #
  548 #       assume that consecutive <INPUT> fields correspond to consecutive answer labels).    #
  549 #       If a label is found, the blank value space is replaced with the appropriate       #
  550 #       submitted answer (note that we can assume that there is a one-to-one correspondence   #
  551 #       between answer labels and submitted answers; this is guaranteed by the specs). Radio  #
  552 #       buttons and checkboxes are handled specially; see below. The modified text is then    #
  553 #       added to the output string, which is split on a placeholder such that the output    #
  554 #       array has the same number of entries as the input array (this is not required, but    #
  555 #       might avoid some subtle bug in the future).                       #
  556 #                                                     #
  557 # NOTE:     The specifications seem to require that the input text array consist of one       #
  558 #         field for each line of text. However, it appears that the input is actually one     #
  559 #         field, with newline characters separating lines. This function should accept      #
  560 #         either form of input, although the "correct" form of one field per line has not     #
  561 #         been tested. It is possible that, if input is received in this form AND the       #
  562 #         newline characters have been truncated, the output could be garbled.          #
  563 #                                                   #
  564 #                                     --David Etlinger 6/7/2000 #
  565 #                                                   #
  566 # ADDED:    Added a few lines of code to properly handle radio buttons. Checkboxes still need   #
  567 #       to be implemented.                                    #
  568 #                                     --David Etlinger 6/14/2000  #
  569 #                                                   #
  570 # ADDED:    Added code to handle checkboxes. This is complicated because the submitted checkboxes #
  571 #       are originally stored as a single string with "\0" as a delimiter. If the input type  #
  572 #       is determined to be checkboxes, the string is first split into an array. A hash key   #
  573 #       in a special checkbox array is then made to point to the array. This is done because  #
  574 #       there might be more than one checkbox set in a single question. Each time an input line #
  575 #       of type checkbox appears, the next value in this array is popped into a temp variable.  #
  576 #       If it is determined that the line being processed corresponds to this value, the line #
  577 #       is processed (made "sticky"); otherwise, the value is pushed back on the array. The   #
  578 #       fact that the number of checked cehckboxes is known but the total number of checkboxes  #
  579 #       is not means that a given line of input type checkbox might or might not correspond   #
  580 #       to the next value in the checkbox array. (I hope this explanation is clear enough!)   #
  581 #                                     --David Etlinger 6/28/2000  #
  582 #########################################################################################################
  583 
  584 sub l2h_sticky_answers {
  585   my ( $rh_submittedAnswers, $ra_printLines, $rh_flags ) = @_;
  586 
  587   #warn ("rh_submittedAnswers = \@rh_submittedAnswers");
  588   #warn ("ra_printLines = \@{ra_printLines}");
  589   #warn ("rh_flags = \@{rh_flags}");
  590 
  591   my %submittedAnswers = %{$rh_submittedAnswers};
  592   my @printLines = @{$ra_printLines};
  593   my @answerLabels = @{$rh_flags -> {ANSWER_ENTRY_ORDER}};
  594 
  595   my $line;         # holds the text of each line
  596   my $label;          # holds each answer label
  597   my $counter = 0;      # holds the index of the current answer
  598   my $output;         # holds the text the subroutine returns
  599 
  600   my $answer_value;
  601 
  602   my %checkboxAns;      # holder for the checkbox multi-part answers
  603   my $nextCheckboxAns;    # temp holder for the next checkbox answer to be processed
  604 
  605   my $placeholder = "\x253";  # unused hex character to join text lines with
  606 
  607   #first, convert the array of text lines to one string...
  608   my $text = join( "$placeholder", @printLines );
  609 
  610   #then, split it such that a line consists of either text
  611   #or a single <INPUT> tag (case insensitive; note also that
  612   #whitespace within the <INPUT> tag is accounted for).
  613   # NOTE -- the regular expression searches for "<", then any
  614   # amount of whitespace, then "INPUT", then any number of
  615   # characters that aren't ">", then ">". I think that instead of
  616   # searching for characters that aren't ">", I could have instead
  617   # searched to match a minimal number of characters (using ?), and
  618   # then ">". I don't know regular expressions well enough to tell
  619   # if this might lead to some subtle difference.
  620   my @textLines = split( m|(<\s*INPUT[^>]*>)|is, $text );
  621   #my @textLines = split( m|(<\s*INPUT.*?>)|is, $text );
  622 
  623   foreach $line ( @textLines ) {
  624     if( $line =~ m|<\s*INPUT|i ) {
  625       foreach $label ( @answerLabels ) {
  626           next unless exists( $submittedAnswers{$label} );  # skip if no answer was submitted.
  627         if( $line =~ m|NAME\s*=\s*"$label"|i ) {
  628           if( $line =~ m|TYPE\s*=\s*RADIO|i ) {     #handle radio buttons
  629             $line =~ s|VALUE\s*=\s*"$submittedAnswers{$label}"|VALUE = "$submittedAnswers{$label}" CHECKED|i;
  630           }
  631           elsif( $line =~ m|TYPE\s*=\s*CHECKBOX|i ) {
  632             #make the hash key point to an anonymous array
  633             $checkboxAns{$label} = [ split( "\0", $submittedAnswers{$label} ) ] if not exists( $checkboxAns{$label} );
  634             if( defined $checkboxAns{$label}[0] ) {
  635               $nextCheckboxAns = shift @{$checkboxAns{$label}};
  636               if( $line !~ s|VALUE\s*=\s*"$nextCheckboxAns"|VALUE = "$nextCheckboxAns" CHECKED|i ) {
  637                 unshift( @{$checkboxAns{$label}}, $nextCheckboxAns );   #put the unused answer back on the list
  638               }
  639             }
  640           }
  641           else {
  642              # we'll assume this is something else, like one or more fields.
  643              # if it's several fields, we need to take only one answer at a time
  644              # \0 are used to delimeter between entries.
  645              if ($submittedAnswers{$label} =~ /\0/ ) {
  646                   my @answers = split("\0", $submittedAnswers{$label});
  647                   $answer_value = shift(@answers);  # use up the first answer
  648                   $submittedAnswers{$label}=join "\0", @answers;  # store the rest
  649                   $answer_value= '' unless defined($answer_value);
  650 
  651               }
  652               else {
  653               $answer_value = $submittedAnswers{$label};
  654             }
  655 
  656             $line =~ s|VALUE\s*=\s*""|VALUE = "$answer_value"|i;
  657           }
  658         }
  659       }
  660     }                 #end if test for "<INPUT"
  661 
  662     $output .= $line;
  663   }                   #end foreach
  664 
  665   @printLines = split( m|$placeholder|, $output );
  666   return @printLines;
  667 }                     #end l2h_sticky_answers()
  668 
  669 ## This is the old system (but newer than the one below).
  670 ## It has been replaced for two reasons:
  671 ## 1) It is complicated and difficult to understand or modify
  672 ## 2) It does not work for several situations that rarely come up,
  673 ##    but must be handled properly. Specifically, it doesn't handle
  674 ##    text with more than one <INPUT> tag on a given line very well.
  675 ##    there are probably other problems, but that is the biggest.
  676 ##                                --DME 6/7/2000
  677 #     # the following doubly nested loop iterates over each line,
  678 #     # and for each line searches for each answer label. Technically,
  679 #     # it might have been faster to join each entry in @printlines
  680 #     # into one string, search on that, and split it back up, but I
  681 #     # felt that the slight theoretical speed gain was not worth the
  682 #     # added complexity.
  683 #     warn "answerLabels = @answerLabels";  #DEBUG
  684 #     foreach $line ( @printLines ) {
  685 #       warn "Line is $line";   #DEBUG
  686 #       foreach $label ( @answerLabels ) {
  687 #         if( $line =~ m|<INPUT TYPE=TEXT.*NAME="$label| ) {
  688 #           while ($line =~ /VALUE = ""/) {
  689 #             # Put trailing space in displayed answer so that while loop will
  690 #             # always end.  We are using the form of the s/// operator which
  691 #             # evaluates its right hand side
  692 #             $line =~ s|NAME="$label" VALUE = ""|
  693 #               $counter++;
  694 #               $submittedAnswers[$counter]=" " unless defined ($submittedAnswers[$counter])
  695 #                 && not $submittedAnswers[$counter] =~ /^\s*$/;
  696 #               qq{ NAME="$label" VALUE = "$submittedAnswers[$counter]" } |e;
  697 #             # This insures that in VALUE = "$submittedAnswers[$counter]"
  698 #             # the quantity $submittedAnswers[$counter]
  699 #             # is never empty. This is required in order to terminate the loop.
  700 #           }               #end while
  701 #           push( @output, $line );
  702 #         }                 #end if
  703 #         else {
  704 #           push( @output, $line );
  705 #         }
  706 #       }                   #end foreach over @answerLabels
  707 #     }                     #end foreach over @printLines
  708 #
  709 #     @printLines = @output;
  710 #   }                       #end outer if
  711 #
  712 #   return @printLines;
  713 # }                         #end l2h_sticky_answers()
  714 
  715 ##subroutine that makes answers sticky in l2h mode
  716 # this is an old version of this routine, which assumes (incorrectly)
  717 # that answer labels begin with "AnSwEr". I've left it here just in case...
  718 # DME 6/6/2000
  719 #sub l2h_sticky_answers {
  720 # my ($refSubmittedAnswers, $refprintlines)=@_;
  721 # my @printlines=@$refprintlines;
  722 # if ((@{$refSubmittedAnswers}!=0)) {
  723 #   my $line;
  724 #   my @output=();
  725 #   foreach $line (@printlines)   {
  726 #     if  ($line =~ m|<INPUT TYPE=TEXT.*NAME="AnSwEr|)  {
  727 #       #print "<P>line doesn't exists<P>\n" unless defined($line);
  728 #       while ($line =~ /VALUE = ""/) {
  729 #         ## Put trailing space in displayed answer so that while loop will
  730 #         ## always end.  We are using the form of the s/// operator which evaluates its right hand side
  731 #         $line =~ s|NAME="AnSwEr(\d*)" VALUE = ""|
  732 #           my $tttemp = $1;
  733 #           ${$refSubmittedAnswers}[$tttemp-1]=" " unless defined (${$refSubmittedAnswers}[$tttemp-1])
  734 #             &&  not ${$refSubmittedAnswers}[$tttemp-1] =~ /^\s*$/;
  735 #
  736 #           qq{ NAME="AnSwEr$tttemp" VALUE = "${$refSubmittedAnswers}[$tttemp-1]" } |e;
  737 #         # This insures that in VALUE = "${$refSubmittedAnswers}[$tttemp-1]" the quantity ${$refSubmittedAnswers}[$tttemp-1]
  738 #         # is never empty.  This is required in order to terminate the loop.
  739 #       }
  740 #       push(@output, $line);
  741 #     }
  742 #     else {
  743 #       push(@output, $line);
  744 #     }
  745 #   }
  746 #
  747 #   @printlines = @output;
  748 # }
  749 #
  750 # @printlines;
  751 #}
  752 
  753 ##subroutine that updates current keys in the l2h mode
  754 
  755 # sub l2h_update_keys {
  756 #         my ($sessionKey, $refprintlines)= @_;
  757 #         my @printlines=@$refprintlines;
  758 #         my $line;
  759 #         my @output=();
  760 #   #my $sessionKey = $main::sessionKey;
  761 #   warn "hi lines = ",join("",@printlines);
  762 #     foreach $line (@printlines)   {
  763 #     if  ($line =~ m|^\s*<A(.*?)\&key=[^&]*&user|) {  #<A.*&key=.*?&user
  764 #       #grab the session key from the CGI input or make it blank
  765 #       $line =~ s|^\s*<A(.*?)&key=[^&]*&user|<A$1&key=$sessionKey&user|;
  766 #       warn "line = $line<BR>";
  767 #       push(@output, $line);
  768 #     }else{
  769 #       push(@output, $line);
  770 #     }
  771 #
  772 #         }
  773 #         @printlines;
  774 #
  775 # }
  776 
  777 
  778 sub makeL2H {
  779   my ($TMPPROBDIR,$psvn) =@_;
  780   $ENV{PATH} .= "$Global::extendedPath";
  781   if($Global::externalLaTeX2HTMLVersion eq "98.1p1") {
  782     system("$Global::externalLaTeX2HTMLPath -no_math -init_file $Global::externalLaTeX2HTMLInit -dir $TMPPROBDIR -prefix $psvn $TMPPROBDIR${psvn}output.tex > $TMPPROBDIR${psvn}l2h.log 2>&1");
  783   } elsif($Global::externalLaTeX2HTMLVersion eq "96.1") {
  784     system("$Global::externalLaTeX2HTMLPath -init_file $Global::externalLaTeX2HTMLInit -dir $TMPPROBDIR -prefix $psvn $TMPPROBDIR${psvn}output.tex > $TMPPROBDIR${psvn}l2h.log");
  785   } else {
  786     die "Unknown LaTeX2HTML version: \$Global::externalLaTeX2HTMLVersion = $Global::externalLaTeX2HTMLVersion";
  787   }
  788 }
  789 
  790 1;

aubreyja at gmail dot com
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