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Revision 1071 - (download) (as text) (annotate)
Mon Jun 9 02:26:17 2003 UTC (16 years, 8 months ago) by gage
File size: 35505 byte(s)
Bringing these files in sync with the latest versions in the
courseScripts CVS
--Mike

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

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