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Revision 1764 - (download) (as text) (annotate)
Fri Jan 30 15:28:46 2004 UTC (16 years ago) by jj
File size: 36328 byte(s)
Some sites use only one display mode.  In that case, the "choice of one"
display mode should not be displayed.

    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 $debug =1, log, etc. files created by
   10                   ## latex2html are not deleted
   11 
   12 ##############################################################
   13 #  File: DisplayMacros.pl
   14 #  This contains the subroutines for  creating problem files
   15 ##############################################################
   16 
   17 ################################################################
   18 #  Copyright @1995-1998 by Michael E. Gage, Arnold K. Pizer and
   19 #  WeBWorK at the University of Rochester. All rights reserved.
   20 ################################################################
   21 
   22 
   23 ## To add or delete displayModes edit this file
   24 
   25 sub displaySelectModeLine_string
   26                   # called from probSet.pl
   27                   # displays the option line for selecting display modes
   28 {
   29    # If the system is set up with only one display mode, there is
   30    # no need to display a choice - use the default
   31    if(scalar(@{$Global::available_mode_list})<2) {
   32      return('<input type="hidden" name="Mode" value="'.
   33           $Global::htmldisplayModeDefault .'">');
   34    }
   35    my ($displayMode) =@_ ;
   36    my $out = "Display Mode: <BR>";
   37 
   38 # A list of the available modes.
   39   my $mode_list = $Global::available_mode_list; ## ref to a list of available modes
   40                                   ## The format is [internal symbol, external name]
   41 # A list of the available modes.
   42 # Format is [internal symbol, external name, ""], where the third
   43 # argument is changed to checked below for the current displayMode
   44 #   my $mode_list = [
   45 # ['HTML', 'text', ""],
   46 # ['HTML_tth', 'formatted-text',""],
   47 # ['HTML_dpng' ,'dvipng',""],
   48 # ['Latex2HTML', 'typeset',""]
   49 # ];
   50 
   51 # Make the format [internal symbol, external name, '']
   52 # The third argument is changed to checked below for the current displayMode
   53   my $j;
   54   for $j (0..(scalar(@{$mode_list})-1)) {
   55     push @{$mode_list->[$j]},'';
   56   }
   57 
   58    if (! defined($displayMode) ) {$displayMode = $Global::htmldisplayModeDefault;}
   59 
   60 
   61    my $found = 0;
   62 # Search through all modes to match for displayMode
   63 # If we don't find one, found=0 will trigger warn message below
   64    for $j (0..(scalar(@{$mode_list})-1)) {
   65      if($mode_list->[$j]->[0] eq $displayMode) {
   66         $mode_list->[$j]->[2] = "CHECKED";
   67         $found=1;
   68         last;
   69      }
   70    }
   71 
   72    for $j (@{$mode_list}) {
   73      $out .= qq!<INPUT TYPE=RADIO NAME="Mode" VALUE="$j->[0]" $j->[2]>$j->[1]<BR>\n!;
   74    }
   75    if(! $found) {
   76      my $wstr = " Error: displayMacros.pl: sub displaySelectModeLine. Unrecognized mode |$displayMode| .  The acceptable modes are: ";
   77      for $j (@{$mode_list}) {
   78        $wstr .= " $j->[0] ";
   79      }
   80      warn $wstr;
   81    }
   82   $out;
   83 }
   84 
   85 sub displaySelectModeLine {
   86   print displaySelectModeLine_string(@_);
   87 }
   88 ##################################################################################################################
   89 # Does the initial processing of the problem.
   90 # Returns an array containing the rendered problem.         #
   91 ##################################################################################################################
   92 
   93 sub createDisplayedProblem  {
   94 
   95    my ($setNumber,$probNum,$psvn,$printlinesref,$rh_flags)= @_;
   96    my @printlines;
   97 
   98 
   99       my $coursel2hDirectory = getCoursel2hDirectory();
  100       unless(-e $coursel2hDirectory ) {
  101           &createDirectory($coursel2hDirectory, $Global::l2h_set_directory_permission,
  102             $Global::numericalGroupID);
  103       }
  104 
  105       unless(-e "${coursel2hDirectory}set$setNumber") {
  106       &createDirectory("${coursel2hDirectory}set$setNumber",$Global::l2h_set_directory_permission,
  107         $Global::numericalGroupID);
  108       }
  109 
  110 
  111     my $PROBDIR = convertPath("${coursel2hDirectory}set$setNumber/$probNum-$psvn/");
  112     my $TMPPROBDIR = convertPath("${coursel2hDirectory}$probNum-$psvn/");
  113 
  114       if (! -e $PROBDIR) {  # no gifs of equations have been created
  115           &l2hcreate($setNumber,$probNum,$psvn,$printlinesref);
  116 
  117       } else {  # determine if the gifs are older than the modifications of the source file
  118                 #&attachProbSetRecord($psvn);
  119           my $fileName = &getProblemFileName($probNum,$psvn);
  120           $fileName = "${Global::templateDirectory}$fileName";
  121                   #print "\n\n The filename is $fileName \n\n";
  122           my @probDirStat = stat $PROBDIR;
  123           my @sourceFileStat = stat $fileName;
  124                   #print "\n\n The source file age is $sourceFileStat[9] \n\n";
  125                   #print "\n\n The prob dir age is $probDirStat[9] \n\n";
  126 
  127           if (($sourceFileStat[9] > $probDirStat[9] ) or
  128                              $rh_flags->{'refreshCachedImages'}) {
  129                   ## source file is newer or solutions should be shown recreate the l2h cache
  130                 rmDirectoryAndFiles($PROBDIR);
  131                 &l2hcreate($setNumber,$probNum,$psvn,$printlinesref);
  132           }
  133 
  134 
  135       }
  136       #the problem has been rendered by Latex2HTML into this file:
  137 #      open(TEXXX, "${PROBDIR}${psvn}output.html") || die "Can't open ${PROBDIR}${psvn}output.html";
  138       open(TEXXX, "${PROBDIR}${psvn}output.html") or
  139                warn "ERROR: $0".
  140                "Can't open the HTML file: \n ${PROBDIR}${psvn}output.html\n(allegedly)".
  141                 "translated by latex2HTML\n at displayMacros.pl, line" . __LINE__ ;
  142 
  143       @printlines = <TEXXX>;
  144       push(@printlines, "The file ${PROBDIR}${psvn}output.html was empty") unless @printlines;
  145       #print "PRINTLINES",@printlines;
  146       close(TEXXX);
  147 
  148    @printlines;
  149 }
  150 
  151 
  152 
  153 ###########################################################################################
  154 # Formats and displays the responses to submitted answers to the problem.  Returns a string.          #
  155 ###########################################################################################
  156 
  157 sub display_answers {     # this will be put in displayMacros.pl soon.
  158   #my ($displayCorrectAnswersQ,$showPartialCorrectAnswers,$rh_answer_results,$rh_problem_result)  = @_;
  159     my  ($rh_answer_results,$rh_problem_result,$rh_flags)  = @_;
  160     my $displayCorrectAnswersQ = $rh_flags ->{displayCorrectAnswersQ};
  161     my $showPartialCorrectAnswers = $rh_flags -> {showPartialCorrectAnswers};
  162     my @answer_entry_order = @{$rh_flags -> {ANSWER_ENTRY_ORDER} };
  163     my $ANSWER_PREFIX = $rh_flags -> {ANSWER_PREFIX};
  164   my  $allAnswersCorrectQ = 1;
  165   my  $printedResponse='';
  166   ###### Print appropriate response to submitted answers
  167       my ($i,$answerIsCorrectQ, $normalizedSubmittedAnswer,$normalizedCorrectAnswer,$ans_name,$errors);
  168       $i=0;
  169 #     $printedResponse .= "\n<table border=0 cellpadding=0 cellspacing=0  bgcolor=\"#cccccc\">\n";
  170 # replace above line by next two lines as per Davide Cervone. AKP.
  171       $printedResponse .= "\n<table border=0 cellpadding=7 cellspacing=0 bgcolor=\"#cccccc\">\n";
  172       $printedResponse .= "<tr><td><table border=0 cellpadding=0 cellspacing=0>\n";
  173       foreach my $key ( @answer_entry_order ) {
  174 
  175       $i++;
  176       $answerIsCorrectQ = $rh_answer_results ->{$key} -> {score};
  177       $normalizedSubmittedAnswer = $rh_answer_results ->{$key} -> {student_ans};
  178       $normalizedSubmittedAnswer = '' if ($normalizedSubmittedAnswer =~ /^error:\s+empty/);
  179       $normalizedCorrectAnswer = $rh_answer_results ->{$key} -> {original_correct_ans};
  180 
  181         ##  Handle the case where the answer evaluator does not return original_correct_ans
  182       if ((!defined $normalizedCorrectAnswer) or (!$normalizedCorrectAnswer =~ /\S/)) {
  183         $normalizedCorrectAnswer = $rh_answer_results ->{$key} -> {correct_ans};
  184       }
  185 
  186       $errors = $rh_answer_results ->{$key} -> {ans_message};
  187       $errors = '' if ($errors eq 'empty');
  188       #$ans_name = $rh_answer_results ->{$key} -> {ans_name};
  189       #$ans_name =~ s/$ANSWER_PREFIX//;    # this handles implicitly defined answer names.
  190       $ans_name = $i;  # just number the answers in order
  191         $allAnswersCorrectQ = $allAnswersCorrectQ && $answerIsCorrectQ;
  192       $printedResponse .= "\n<TR><TD align=left COLSPAN =2><em>Answer $ans_name entered:</em>--&gt; $normalizedSubmittedAnswer &lt;-- ";
  193         $printedResponse .=  "<B>Correct. </B></TD></TR>"   if  ($answerIsCorrectQ && $showPartialCorrectAnswers );
  194         $printedResponse .=  "<B>Incorrect. </B></TD></TR>" if (!($answerIsCorrectQ) && $showPartialCorrectAnswers);
  195       $errors =~ s/\n/<BR>/g;  ## convert newlines to <BR> in error messages as per Davide Cervone
  196             # change 9/2/00 by MEG -- give width in pixels rather than %.
  197             # Some browsers break with %  widht which is not the standard
  198       $printedResponse .=  "\n<TR> <TD align=left WIDTH = \"50\" >&nbsp;</TD><TD align=left>$errors</TD></TR>" if ($errors =~ /\w/);
  199 
  200       $printedResponse .= "\n<TR><TD align=left WIDTH = \"50\">&nbsp;</TD>              <TD align=left><em>Correct answer:</em> $normalizedCorrectAnswer</TD></TR>" if ($displayCorrectAnswersQ);
  201 
  202       }
  203       if ($i == 1) {
  204           $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>The above answer is correct.</B><BR>" if ($allAnswersCorrectQ);
  205           $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>The above answer is NOT correct.</B><BR>" if (!($allAnswersCorrectQ));
  206       }
  207       else {
  208           $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>All of the above answers are correct.</B><BR>" if ($allAnswersCorrectQ);
  209           $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>At least one of the above answers is NOT correct.</B><BR>" if (!($allAnswersCorrectQ));
  210       }
  211         my $percentCorr = int(100*$rh_problem_result->{score} +.5);
  212 
  213     $printedResponse .="\n<TR><TD align=left COLSPAN =2><B>Your score on this attempt is ${percentCorr}\%.</B><BR>";
  214 #   $printedResponse .= "\n</table>\n";
  215 # replace above line by next line as per Davide Cervone. AKP.
  216     $printedResponse .= "</td></tr>\n</table>\n</table>\n";
  217 #      $printedResponse .="\n problem grader is ".$rh_problem_result->{type}." and the score is ".$rh_problem_result->{score}."<BR>\n";
  218     $printedResponse;
  219 }
  220 
  221 ###########################################################################################
  222 # Previews submitted answers to the problem.  Returns a string.           #
  223 ###########################################################################################
  224 
  225 sub preview_answers {
  226     my  ($rh_answer_results,$rh_problem_result,$rh_flags)  = @_;
  227     my @answer_entry_order = @{$rh_flags -> {ANSWER_ENTRY_ORDER} };
  228     my $ANSWER_PREFIX = $rh_flags -> {ANSWER_PREFIX};
  229     my $printedResponse ='';
  230   ###### Print appropriate response to submitted answers
  231       my ($i,$original_student_ans,$normalizedSubmittedAnswer,$errors,$ans_name,$preview_text_string,$preview_latex_string);
  232         my ($ans_evaluator_type, $value_word, $error_word, $show_value);
  233 
  234       $i=0;
  235       $printedResponse .= "\n<table border=0 cellpadding=0 cellspacing=0  >\n";
  236       foreach my $key ( @answer_entry_order ) {
  237     $i++;
  238     $ans_name = $rh_answer_results ->{$key} -> {ans_name};
  239     #$ans_name =~ s/$ANSWER_PREFIX//;    # this handles implicitly defined answer names.  #commented out by DME 6/6/2000
  240     $original_student_ans = $rh_answer_results ->{$key} -> {original_student_ans};
  241     $normalizedSubmittedAnswer = $rh_answer_results ->{$key} -> {student_ans};
  242     $errors = $rh_answer_results ->{$key} -> {ans_message};
  243     $errors =~ s/\n/<BR>/g;  ## convert newlines to <BR> in error messages as per Davide Cervone
  244     $preview_text_string ='';
  245     $preview_text_string = $rh_answer_results ->{$key} -> {preview_text_string}
  246       if defined $rh_answer_results ->{$key} -> {preview_text_string};
  247     $preview_latex_string ='';
  248     $preview_latex_string = $rh_answer_results ->{$key} -> {preview_latex_string}
  249       if defined $rh_answer_results ->{$key} -> {preview_latex_string};
  250     $ans_evaluator_type = $rh_answer_results ->{$key} -> {type};
  251     $value_word = 'value:';
  252     $show_value = 0;
  253     $show_value = 1 if ((($ans_evaluator_type =~ /number/) and ($normalizedSubmittedAnswer =~ /\w/)) or ($normalizedSubmittedAnswer =~ /^error/));
  254     $show_value = 0 if ($normalizedSubmittedAnswer =~ /^error:\s+empty/);
  255     $value_word = '' if ($normalizedSubmittedAnswer =~ /^error/);
  256     $error_word = 'error:';
  257     $error_word = '' if ($errors =~ /^error:/);
  258     $printedResponse .= "\n<TR><TD align=left>Ans $i </TD>";
  259     #$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
  260     $printedResponse .= "\n<TD align=left><INPUT TYPE=\"text\" NAME=\"${ans_name}\"  VALUE=\"$original_student_ans\" SIZE=70></TD></TR>";
  261     $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>parsed: $preview_text_string</TD></TR>" if ($preview_text_string =~ /\w/);
  262     $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>${value_word} $normalizedSubmittedAnswer</TD></TR>" if $show_value == 1;
  263     $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>${error_word} $errors</TD></TR>" if (($errors =~ /\w/) and ($errors ne 'empty')) ;
  264     if ($preview_latex_string =~ /\w/) {
  265       $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>";
  266       $printedResponse .= "\n <APPLET CODE=\"HotEqn.class\" HEIGHT=\"80\" WIDTH=\"500\" ARCHIVE=\"HotEqn.zip\" NAME=\"Equation\" ALIGN=\"middle\" CODEBASE=\"$Global::appletsURL\"> ";
  267       $printedResponse .= "\n <PARAM NAME=\"equation\" VALUE=\"$preview_latex_string\"></APPLET></TD></TR> ";
  268     }
  269     $printedResponse .= "\n<TR Height = 5></TR>";
  270       }
  271 
  272     $printedResponse .= "\n</table>\n";
  273     $printedResponse;
  274 }
  275 
  276 
  277 sub lc_sort {  # this sorts strings with letters and number groups, alternately lexigraphically and numerically
  278                # (lc stands for library of congress as in QA617.34R45)
  279     my($left,$right) = @_;
  280     # format  "abcd345.57def34ABC";
  281     # string assumed to begin with alpha
  282     # string is split into alternating alpha and numeric groups
  283     # numeric groups match [\d\.]+
  284     # numeric groups assumed to contain at least one digit, ( a period alone will cause and error)
  285     # alpha groups can contain any characters except digits and the period
  286     # spaces in alpha groups will cause unexpected behavior
  287     # sort is not case sensitive
  288     # _ sorts after alpha characters
  289 
  290     # not case sensitive
  291 
  292     my @a = split( /([\d\.]+)/, $left);
  293 
  294     my @b = split( /([\d\.]+)/, $right);
  295 
  296     my $out = undef;
  297     my $mode = 0;  # even is lexic and odd is numeric
  298     my($l,$r);
  299     while (@a) {
  300     $l = shift @a;
  301     $r = shift @b;
  302     $out = ($mode++ % 2 == 0) ? uc($l) cmp uc($r) : $l <=> $r;  # lexic or numeric compare
  303     last unless $out==0;   # stop unless $l and $r are different.
  304 
  305     }
  306    $out;
  307 }
  308 
  309 #####################################################################
  310 # Creates an insert which appears on the probSet page.              #
  311 #####################################################################
  312 sub createDisplayedInsert
  313 {
  314    #my ($mode,$setNumber,$fileName,$psvn,$courseName,$printlinesref)= @_;
  315    my ($setNumber,$fileName,$psvn,$courseName,$printlinesref)= @_;
  316 
  317    my @printlines=@$printlinesref;
  318    my $PROBDIR;
  319 
  320 #   if($mode eq "HTML" || $mode eq 'HTML_tth') {
  321 #       @printlines = &createProblem2($mode,$fileName,$psvn,$courseName,$sourceref);
  322 #
  323 #   } elsif ($mode eq 'Latex2HTML')  {
  324      #latex2html processing
  325       my $coursel2hDirectory = getCoursel2hDirectory();
  326       unless(-e $coursel2hDirectory ) {
  327           &createDirectory($coursel2hDirectory, $Global::l2h_set_directory_permission,
  328             $Global::numericalGroupID);
  329       }
  330 
  331       unless(-e "${coursel2hDirectory}set$setNumber") {
  332       &createDirectory("${coursel2hDirectory}set$setNumber",$Global::l2h_set_directory_permission,
  333         $Global::numericalGroupID);
  334       }
  335 
  336   my $shortFileName = $fileName;
  337   $shortFileName =~ s|^.*?([^\/]*)$|$1|;
  338   $shortFileName =~ s|\..*$||;
  339   $PROBDIR = convertPath("${coursel2hDirectory}set$setNumber/$shortFileName-$psvn/");
  340   if (! -e $PROBDIR) {
  341     &l2hcreate($setNumber,$shortFileName,$psvn,$printlinesref);
  342   } else  {
  343     #&attachProbSetRecord($psvn);
  344           my $fullFileName = "${Global::templateDirectory}$fileName";
  345           #print "\n\n The  full filename is $fullFileName \n\n";
  346           my @probDirStat = stat $PROBDIR;
  347           my @sourceFileStat = stat $fullFileName;
  348           #print "\n\n The source file age is $sourceFileStat[9] \n\n";
  349           #print "\n\n The prob dir age is $probDirStat[9] \n\n";
  350           if ($sourceFileStat[9] > $probDirStat[9] )  { ## source file is newer
  351             rmDirectoryAndFiles($PROBDIR);
  352                 &l2hcreate($setNumber,$shortFileName,$psvn,$printlinesref);
  353           }
  354            #else {&createProblem2($mode, $fileName, $psvn,$courseName,$sourceref);}   ##initialize problem
  355 
  356   }
  357 
  358 
  359       open(TEXXX, "${PROBDIR}${psvn}output.html") or
  360         wwerror("ERROR: $0", "Can't open ${PROBDIR}${psvn}output.html",'','', '');
  361       @printlines = <TEXXX>;
  362       close(TEXXX);
  363 #   } else  {
  364 #
  365 #       @printlines="createDisplayedProblem: Error:  Mode is not HTML, HTML_tthHTML_tth or Latex2HTML.";
  366 #
  367 #
  368 #   }
  369    @printlines;
  370 }
  371 
  372 ##do not need this subroutine anymore
  373 #sub l2hcreateProb {
  374 #   my ($setNumber,$probNum,$psvn,$printlinesref)= @_;
  375 #   #my ($setNumber,$probNum,$psvn,$courseName,$printlinesref)= @_;
  376 #   #my $mode = 'Latex2HTML';
  377 #
  378 #   #my @printlines = &createProblem($mode, $probNum, $psvn, $courseName,$sourceref,$refSubmittedAnswers);
  379 #   #my $printlinesref = \@printlines;
  380 #   my $tmpDirectory = "tmp/l2h/set$setNumber/$probNum-$psvn/";
  381 #   l2hcreate($setNumber,$probNum,$psvn,$printlinesref)
  382 #}
  383 
  384 #do not use this subroutine anymore
  385 #sub l2hcreateInsert {
  386 #   my ($setNumber,$shortFileName,$psvn,$printlinesref)= @_;
  387 #   #my $mode = 'Latex2HTML';
  388 #   #my @printlines = &createProblem2($mode, $fileName, $psvn,$courseName,$sourceref);
  389 #   #my $printlinesref = \@printlines;
  390 #   #my $shortFileName = $fileName;
  391 #   #$shortFileName =~ s|^.*?([^\/]*)$|$1|;
  392 #   #my $tmpDirectory = "tmp/l2h/set$setNumber/$shortFileName-$psvn/";
  393 #   l2hcreate($setNumber,$shortFileName,$psvn,$printlinesref)
  394 #}
  395 
  396 sub l2hcreate {     ## for latex2HTML 96.1 and 98.1
  397    my ($setNumber,$probNum,$psvn,$printlinesref) = @_;
  398 
  399    # warn "l2hcreate is being executed displaymacros.pl line ".__LINE__;
  400 
  401    my $PROBDIR = convertPath(&getCoursel2hDirectory."set$setNumber/$probNum-$psvn/");
  402    my $TMPPROBDIR = convertPath(&getCoursel2hDirectory."$probNum-$psvn/");
  403    my $PROBURL = &getCoursel2hURL."set$setNumber/$probNum-$psvn/";
  404 
  405    &createDirectory($TMPPROBDIR,$Global::l2h_prob_directory_permission,$Global::numericalGroupID)
  406      unless(-e "$TMPPROBDIR");
  407 
  408    open(OUTTEXFILE, ">$TMPPROBDIR${psvn}output.tex") or wwerror($0, "Can't open temporary file $TMPPROBDIR${psvn}output.tex");
  409 
  410    print OUTTEXFILE &texInput($Global::TEX_PROB_PREAMBLE);
  411    print OUTTEXFILE &texInput($Global::TEX_PROB_HEADER);
  412    print OUTTEXFILE @$printlinesref;
  413    print OUTTEXFILE &texInput($Global::TEX_PROB_FOOTER);
  414    close(OUTTEXFILE);
  415 
  416    ## Give this temporary file permission 666 in case the process dies before it it deleted 60 lines further down
  417    chmod(0666, "$TMPPROBDIR${psvn}output.tex");
  418 
  419                   ##  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");
  420    my $latex2HTML_result = &makeL2H($TMPPROBDIR, $psvn) ;
  421    warn( "LaTeX2HTML failed. Returned with status: $latex2HTML_result\n" ) if $latex2HTML_result ;
  422 
  423    ##Get rid of all unwanted stuff in html document created by latex2html
  424    unless(-e "${TMPPROBDIR}${psvn}output.html") {
  425         warn "Can't rename ${TMPPROBDIR}${psvn}output.html";
  426         return (0);  ### there was a failure in latex2html processing
  427                      ### we just give a warning so that so that l2hPrecreateSet.pl can continue
  428    }
  429 
  430    rename("${TMPPROBDIR}${psvn}output.html","${TMPPROBDIR}${psvn}output.html.org") or
  431      warn "Can't rename ${TMPPROBDIR}${psvn}output.html at ". __LINE__;
  432    open(TEXORG, "${TMPPROBDIR}${psvn}output.html.org") or
  433      warn "Can't open ${TMPPROBDIR}${psvn}output.html.org";
  434    my @l2hOutputArray;
  435 
  436 
  437 
  438 
  439    BLK: {  # This is protection to make absolutely sure that the line separater is set properly.
  440            # It's still a mystery as to where this becomes defined to be something else.
  441      local($/);
  442      $/ = "\n";
  443      @l2hOutputArray = <TEXORG>;
  444 
  445 
  446    }
  447 
  448    close(TEXORG);
  449    open(TEXNEW, ">${TMPPROBDIR}${psvn}output.html") or
  450      wwerror($0, "Can't open ${TMPPROBDIR}${psvn}output.html",'','', '');
  451 
  452 
  453     foreach (@l2hOutputArray) {
  454         if($_ =~ /^<META/) {next;}
  455         if($_ =~ /^<!DOCTYPE HTML PUBLIC/) {next;}
  456         if($_ =~ /^<HTML>/) {next;}
  457         if($_ =~ /^<HEAD>/) {next;}
  458         if($_ =~ /^<TITLE>/) {next;}
  459         if($_ =~ /^<LINK REL/) {next;}
  460         if($_ =~ /^<\/HEAD>/) {next;}
  461         if($_ =~ /^<BODY/) {next;}
  462         if($_ =~ /^<\/BODY>/) {next;}
  463         if($_ =~ /^<\/HTML>/) {next;}
  464         if($_ =~ /^<BR> <HR>/) {next;}
  465 
  466         print TEXNEW ;
  467     }
  468 
  469 
  470     close(TEXNEW);
  471 
  472          ## Now do global multiline changes on whole file
  473 
  474     open(TEXNEW, "${TMPPROBDIR}${psvn}output.html") or
  475      wwerror("$0", "Can't open ${TMPPROBDIR}${psvn}output.html",'','', '');
  476     @l2hOutputArray = <TEXNEW>;
  477     close(TEXNEW);
  478     my $l2hOutputString = join('',@l2hOutputArray);
  479 
  480                ## make gif images created by latex2html locatable by server
  481                ## NOTE: $htmlURL is defined in webworkCourse.ph . Often this will
  482                ## will be a link appearing in a public_html_docs directory.
  483                ## The $htmlURL, any links, and the next line must be coordinated.
  484 
  485     $l2hOutputString =~ s|${psvn}img|${PROBURL}${psvn}img|g;
  486 
  487                  ## remove multiline comments
  488     $l2hOutputString =~ s|<!--.*?-->\n||sg;
  489 
  490     open(TEXNEW, ">${TMPPROBDIR}${psvn}output.html") or
  491      wwerror("$0", "Can't open ${TMPPROBDIR}${psvn}output.html",'','', '');
  492     print TEXNEW $l2hOutputString;
  493     close(TEXNEW);
  494 
  495                ## remove unneeded files
  496 
  497     unless ($debug) {unlink("${TMPPROBDIR}${psvn}output.html.org");}
  498     unless ($debug) {unlink(<${TMPPROBDIR}*images.*>);}
  499     unless ($debug) {unlink(<${TMPPROBDIR}.*.db>);}
  500     unless ($debug) {unlink(<${TMPPROBDIR}*.db>);}
  501     unless ($debug) {unlink(<${TMPPROBDIR}IMG_PARAMS.*>);}
  502     unless ($debug) {unlink(<${TMPPROBDIR}*.pl>);}
  503     unless ($debug) {unlink(<${TMPPROBDIR}*.css>);}
  504     unless ($debug) {unlink("${TMPPROBDIR}index.html");}
  505     unless ($debug) {unlink("${TMPPROBDIR}${psvn}output.tex");}
  506     unless ($debug) {unlink("${TMPPROBDIR}${psvn}l2h.log");}
  507     unless ($debug) {
  508         my @allfiles = ();
  509         opendir( DIRHANDLE, "$TMPPROBDIR") || warn qq/Can't read directory $TMPPROBDIR $!/;
  510         @allfiles = map "$TMPPROBDIR$_", grep( /^l2h/, readdir DIRHANDLE);
  511         closedir(DIRHANDLE);
  512         my $l2hTempDir = $allfiles[0];
  513         if (defined $l2hTempDir)  {
  514             unlink(<$l2hTempDir/*>);
  515             rmdir ($l2hTempDir);
  516         }
  517     }
  518 
  519                ## change permission and group on remaining files
  520     chmod($Global::l2h_data_permission, glob("${TMPPROBDIR}*"));
  521     chown(-1,$Global::numericalGroupID,glob("${TMPPROBDIR}*"));
  522 
  523     ## Now that all the processing has been done, rename the $TMPPROBDIR TO $PROBDIR
  524 
  525      rename("$TMPPROBDIR","$PROBDIR") or
  526     warn "Can't rename the temporary problem directory:\n $TMPPROBDIR to $PROBDIR\n at displayMacros.pl , line: " . __LINE__ ;
  527 
  528 }
  529 
  530 
  531 #########################################################################################################
  532 ##Subroutine that makes answers sticky in l2h mode                            #
  533 #                                                   #
  534 # INPUT:    $rh_submittedAnswers  Reference to a hash containing the answers submitted      #
  535 #         $ra_printLines      Reference to an array containing the (HTML) text to be output #
  536 #         $rh_flags       Reference to a hash containing flags; specifically a      #
  537 #                       reference to an array containing the answer field labels  #
  538 #                                                     #
  539 # OUTPUT:   @printLines       An array containing the (modified) text to be output      #
  540 #                                                     #
  541 # OVERVIEW:   l2h_sticky_answers is given HTML text, a list of submitted answers, and a list of   #
  542 #         answer field labels. Its job is to retain the user's answers between submissions    #
  543 #         when in typeset mode (this is handled elsewhere in the text modes). Basically, its    #
  544 #         job is to act as a "filter" for the HTML text, replacing the answer fields that have  #
  545 #         been reset with fields containing the previously entered answers, returning the     #
  546 #         modified text. A brief high-level overview of the algorithm follows:          #
  547 #                                                     #
  548 # ALGORITHM:  The references are first dereferenced. The incoming text is first joined into     #
  549 #         one string. It is then split up again, but not by line. Rather, the text is split   #
  550 #         such that each array entry is either text which can be ignored, or a single       #
  551 #         <INPUT...> tag. Each entry is then processed. If it is an <INPUT> tag, then it      #
  552 #         must be checked for the presence of each answer field label for which a value was   #
  553 #       submitted (there are many <INPUT> fields which are not answer fields, so we can't   #
  554 #       assume that consecutive <INPUT> fields correspond to consecutive answer labels).    #
  555 #       If a label is found, the blank value space is replaced with the appropriate       #
  556 #       submitted answer (note that we can assume that there is a one-to-one correspondence   #
  557 #       between answer labels and submitted answers; this is guaranteed by the specs). Radio  #
  558 #       buttons and checkboxes are handled specially; see below. The modified text is then    #
  559 #       added to the output string, which is split on a placeholder such that the output    #
  560 #       array has the same number of entries as the input array (this is not required, but    #
  561 #       might avoid some subtle bug in the future).                       #
  562 #                                                     #
  563 # NOTE:     The specifications seem to require that the input text array consist of one       #
  564 #         field for each line of text. However, it appears that the input is actually one     #
  565 #         field, with newline characters separating lines. This function should accept      #
  566 #         either form of input, although the "correct" form of one field per line has not     #
  567 #         been tested. It is possible that, if input is received in this form AND the       #
  568 #         newline characters have been truncated, the output could be garbled.          #
  569 #                                                   #
  570 #                                     --David Etlinger 6/7/2000 #
  571 #                                                   #
  572 # ADDED:    Added a few lines of code to properly handle radio buttons. Checkboxes still need   #
  573 #       to be implemented.                                    #
  574 #                                     --David Etlinger 6/14/2000  #
  575 #                                                   #
  576 # ADDED:    Added code to handle checkboxes. This is complicated because the submitted checkboxes #
  577 #       are originally stored as a single string with "\0" as a delimiter. If the input type  #
  578 #       is determined to be checkboxes, the string is first split into an array. A hash key   #
  579 #       in a special checkbox array is then made to point to the array. This is done because  #
  580 #       there might be more than one checkbox set in a single question. Each time an input line #
  581 #       of type checkbox appears, the next value in this array is popped into a temp variable.  #
  582 #       If it is determined that the line being processed corresponds to this value, the line #
  583 #       is processed (made "sticky"); otherwise, the value is pushed back on the array. The   #
  584 #       fact that the number of checked cehckboxes is known but the total number of checkboxes  #
  585 #       is not means that a given line of input type checkbox might or might not correspond   #
  586 #       to the next value in the checkbox array. (I hope this explanation is clear enough!)   #
  587 #                                     --David Etlinger 6/28/2000  #
  588 #########################################################################################################
  589 
  590 sub l2h_sticky_answers {
  591   my ( $rh_submittedAnswers, $ra_printLines, $rh_flags ) = @_;
  592 
  593   #warn ("rh_submittedAnswers = \@rh_submittedAnswers");
  594   #warn ("ra_printLines = \@{ra_printLines}");
  595   #warn ("rh_flags = \@{rh_flags}");
  596 
  597   my %submittedAnswers = %{$rh_submittedAnswers};
  598   my @printLines = @{$ra_printLines};
  599   my @answerLabels = @{$rh_flags -> {ANSWER_ENTRY_ORDER}};
  600 
  601   my $line;         # holds the text of each line
  602   my $label;          # holds each answer label
  603   my $counter = 0;      # holds the index of the current answer
  604   my $output;         # holds the text the subroutine returns
  605 
  606   my $answer_value;
  607 
  608   my %checkboxAns;      # holder for the checkbox multi-part answers
  609   my $nextCheckboxAns;    # temp holder for the next checkbox answer to be processed
  610 
  611   my $placeholder = "\x253";  # unused hex character to join text lines with
  612 
  613   #first, convert the array of text lines to one string...
  614   my $text = join( "$placeholder", @printLines );
  615 
  616   #then, split it such that a line consists of either text
  617   #or a single <INPUT> tag (case insensitive; note also that
  618   #whitespace within the <INPUT> tag is accounted for).
  619   # NOTE -- the regular expression searches for "<", then any
  620   # amount of whitespace, then "INPUT", then any number of
  621   # characters that aren't ">", then ">". I think that instead of
  622   # searching for characters that aren't ">", I could have instead
  623   # searched to match a minimal number of characters (using ?), and
  624   # then ">". I don't know regular expressions well enough to tell
  625   # if this might lead to some subtle difference.
  626   my @textLines = split( m|(<\s*INPUT[^>]*>)|is, $text );
  627   #my @textLines = split( m|(<\s*INPUT.*?>)|is, $text );
  628 
  629   foreach $line ( @textLines ) {
  630     if( $line =~ m|<\s*INPUT|i ) {
  631       foreach $label ( @answerLabels ) {
  632           next unless exists( $submittedAnswers{$label} );  # skip if no answer was submitted.
  633         if( $line =~ m|NAME\s*=\s*"$label"|i ) {
  634           if( $line =~ m|TYPE\s*=\s*RADIO|i ) {     #handle radio buttons
  635             $line =~ s|VALUE\s*=\s*"$submittedAnswers{$label}"|VALUE = "$submittedAnswers{$label}" CHECKED|i;
  636           }
  637           elsif( $line =~ m|TYPE\s*=\s*CHECKBOX|i ) {
  638             #make the hash key point to an anonymous array
  639             $checkboxAns{$label} = [ split( "\0", $submittedAnswers{$label} ) ] if not exists( $checkboxAns{$label} );
  640             if( defined $checkboxAns{$label}[0] ) {
  641               $nextCheckboxAns = shift @{$checkboxAns{$label}};
  642               if( $line !~ s|VALUE\s*=\s*"$nextCheckboxAns"|VALUE = "$nextCheckboxAns" CHECKED|i ) {
  643                 unshift( @{$checkboxAns{$label}}, $nextCheckboxAns );   #put the unused answer back on the list
  644               }
  645             }
  646           }
  647           else {
  648              # we'll assume this is something else, like one or more fields.
  649              # if it's several fields, we need to take only one answer at a time
  650              # \0 are used to delimeter between entries.
  651              if ($submittedAnswers{$label} =~ /\0/ ) {
  652                   my @answers = split("\0", $submittedAnswers{$label});
  653                   $answer_value = shift(@answers);  # use up the first answer
  654                   $submittedAnswers{$label}=join "\0", @answers;  # store the rest
  655                   $answer_value= '' unless defined($answer_value);
  656 
  657               }
  658               else {
  659               $answer_value = $submittedAnswers{$label};
  660             }
  661 
  662             $line =~ s|VALUE\s*=\s*""|VALUE = "$answer_value"|i;
  663           }
  664         }
  665       }
  666     }                 #end if test for "<INPUT"
  667 
  668     $output .= $line;
  669   }                   #end foreach
  670 
  671   @printLines = split( m|$placeholder|, $output );
  672   return @printLines;
  673 }                     #end l2h_sticky_answers()
  674 
  675 ## This is the old system (but newer than the one below).
  676 ## It has been replaced for two reasons:
  677 ## 1) It is complicated and difficult to understand or modify
  678 ## 2) It does not work for several situations that rarely come up,
  679 ##    but must be handled properly. Specifically, it doesn't handle
  680 ##    text with more than one <INPUT> tag on a given line very well.
  681 ##    there are probably other problems, but that is the biggest.
  682 ##                                --DME 6/7/2000
  683 #     # the following doubly nested loop iterates over each line,
  684 #     # and for each line searches for each answer label. Technically,
  685 #     # it might have been faster to join each entry in @printlines
  686 #     # into one string, search on that, and split it back up, but I
  687 #     # felt that the slight theoretical speed gain was not worth the
  688 #     # added complexity.
  689 #     warn "answerLabels = @answerLabels";  #DEBUG
  690 #     foreach $line ( @printLines ) {
  691 #       warn "Line is $line";   #DEBUG
  692 #       foreach $label ( @answerLabels ) {
  693 #         if( $line =~ m|<INPUT TYPE=TEXT.*NAME="$label| ) {
  694 #           while ($line =~ /VALUE = ""/) {
  695 #             # Put trailing space in displayed answer so that while loop will
  696 #             # always end.  We are using the form of the s/// operator which
  697 #             # evaluates its right hand side
  698 #             $line =~ s|NAME="$label" VALUE = ""|
  699 #               $counter++;
  700 #               $submittedAnswers[$counter]=" " unless defined ($submittedAnswers[$counter])
  701 #                 && not $submittedAnswers[$counter] =~ /^\s*$/;
  702 #               qq{ NAME="$label" VALUE = "$submittedAnswers[$counter]" } |e;
  703 #             # This insures that in VALUE = "$submittedAnswers[$counter]"
  704 #             # the quantity $submittedAnswers[$counter]
  705 #             # is never empty. This is required in order to terminate the loop.
  706 #           }               #end while
  707 #           push( @output, $line );
  708 #         }                 #end if
  709 #         else {
  710 #           push( @output, $line );
  711 #         }
  712 #       }                   #end foreach over @answerLabels
  713 #     }                     #end foreach over @printLines
  714 #
  715 #     @printLines = @output;
  716 #   }                       #end outer if
  717 #
  718 #   return @printLines;
  719 # }                         #end l2h_sticky_answers()
  720 
  721 ##subroutine that makes answers sticky in l2h mode
  722 # this is an old version of this routine, which assumes (incorrectly)
  723 # that answer labels begin with "AnSwEr". I've left it here just in case...
  724 # DME 6/6/2000
  725 #sub l2h_sticky_answers {
  726 # my ($refSubmittedAnswers, $refprintlines)=@_;
  727 # my @printlines=@$refprintlines;
  728 # if ((@{$refSubmittedAnswers}!=0)) {
  729 #   my $line;
  730 #   my @output=();
  731 #   foreach $line (@printlines)   {
  732 #     if  ($line =~ m|<INPUT TYPE=TEXT.*NAME="AnSwEr|)  {
  733 #       #print "<P>line doesn't exists<P>\n" unless defined($line);
  734 #       while ($line =~ /VALUE = ""/) {
  735 #         ## Put trailing space in displayed answer so that while loop will
  736 #         ## always end.  We are using the form of the s/// operator which evaluates its right hand side
  737 #         $line =~ s|NAME="AnSwEr(\d*)" VALUE = ""|
  738 #           my $tttemp = $1;
  739 #           ${$refSubmittedAnswers}[$tttemp-1]=" " unless defined (${$refSubmittedAnswers}[$tttemp-1])
  740 #             &&  not ${$refSubmittedAnswers}[$tttemp-1] =~ /^\s*$/;
  741 #
  742 #           qq{ NAME="AnSwEr$tttemp" VALUE = "${$refSubmittedAnswers}[$tttemp-1]" } |e;
  743 #         # This insures that in VALUE = "${$refSubmittedAnswers}[$tttemp-1]" the quantity ${$refSubmittedAnswers}[$tttemp-1]
  744 #         # is never empty.  This is required in order to terminate the loop.
  745 #       }
  746 #       push(@output, $line);
  747 #     }
  748 #     else {
  749 #       push(@output, $line);
  750 #     }
  751 #   }
  752 #
  753 #   @printlines = @output;
  754 # }
  755 #
  756 # @printlines;
  757 #}
  758 
  759 ##subroutine that updates current keys in the l2h mode
  760 
  761 # sub l2h_update_keys {
  762 #         my ($sessionKey, $refprintlines)= @_;
  763 #         my @printlines=@$refprintlines;
  764 #         my $line;
  765 #         my @output=();
  766 #   #my $sessionKey = $main::sessionKey;
  767 #   warn "hi lines = ",join("",@printlines);
  768 #     foreach $line (@printlines)   {
  769 #     if  ($line =~ m|^\s*<A(.*?)\&key=[^&]*&user|) {  #<A.*&key=.*?&user
  770 #       #grab the session key from the CGI input or make it blank
  771 #       $line =~ s|^\s*<A(.*?)&key=[^&]*&user|<A$1&key=$sessionKey&user|;
  772 #       warn "line = $line<BR>";
  773 #       push(@output, $line);
  774 #     }else{
  775 #       push(@output, $line);
  776 #     }
  777 #
  778 #         }
  779 #         @printlines;
  780 #
  781 # }
  782 
  783 
  784 sub makeL2H {
  785   my ($TMPPROBDIR,$psvn) =@_;
  786   $ENV{PATH} .= "$Global::extendedPath";
  787   if($Global::externalLaTeX2HTMLVersion eq "98.1p1") {
  788     system("$Global::externalLaTeX2HTMLPath -no_math -init_file $Global::externalLaTeX2HTMLInit -dir $TMPPROBDIR -prefix $psvn $TMPPROBDIR${psvn}output.tex > $TMPPROBDIR${psvn}l2h.log 2>&1");
  789   } elsif($Global::externalLaTeX2HTMLVersion eq "96.1") {
  790     system("$Global::externalLaTeX2HTMLPath -init_file $Global::externalLaTeX2HTMLInit -dir $TMPPROBDIR -prefix $psvn $TMPPROBDIR${psvn}output.tex > $TMPPROBDIR${psvn}l2h.log");
  791   } else {
  792     die "Unknown LaTeX2HTML version: \$Global::externalLaTeX2HTMLVersion = $Global::externalLaTeX2HTMLVersion";
  793   }
  794 }
  795 
  796 1;

aubreyja at gmail dot com
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