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1 : sh002i 1050
2 : apizer 1080
3 : sh002i 1050 use strict;
4 :    
5 :     ## $ENV{'PATH'} .= ':/usr/math/bin';
6 :    
7 :     my $debug = 0;
8 :     $debug = 1 if $Global::imageDebugMode;
9 :     ## if $debug =1, log, etc. files created by
10 :     ## latex2html are not deleted
11 :    
12 :     ##############################################################
13 :     # File: DisplayMacros.pl
14 :     # This contains the subroutines for creating problem files
15 :     ##############################################################
16 :    
17 :     ################################################################
18 :     # Copyright @1995-1998 by Michael E. Gage, Arnold K. Pizer and
19 :     # WeBWorK at the University of Rochester. All rights reserved.
20 :     ################################################################
21 :    
22 :    
23 :     ## To add or delete displayModes edit this file
24 :    
25 :     sub displaySelectModeLine_string
26 :     # called from probSet.pl
27 :     # displays the option line for selecting display modes
28 :     {
29 : jj 1765 my ($displayMode) =@_ ;
30 :     $displayMode = $Global::htmlModeDefault unless(defined($displayMode));
31 : jj 1764 # If the system is set up with only one display mode, there is
32 :     # no need to display a choice - use the default
33 :     if(scalar(@{$Global::available_mode_list})<2) {
34 :     return('<input type="hidden" name="Mode" value="'.
35 : jj 1765 $displayMode .'">');
36 : jj 1764 }
37 : sh002i 1050 my $out = "Display Mode: <BR>";
38 :    
39 :     # A list of the available modes.
40 :     my $mode_list = $Global::available_mode_list; ## ref to a list of available modes
41 :     ## The format is [internal symbol, external name]
42 :     # A list of the available modes.
43 :     # Format is [internal symbol, external name, ""], where the third
44 :     # argument is changed to checked below for the current displayMode
45 :     # my $mode_list = [
46 :     # ['HTML', 'text', ""],
47 :     # ['HTML_tth', 'formatted-text',""],
48 :     # ['HTML_dpng' ,'dvipng',""],
49 :     # ['Latex2HTML', 'typeset',""]
50 :     # ];
51 :    
52 :     # Make the format [internal symbol, external name, '']
53 :     # The third argument is changed to checked below for the current displayMode
54 :     my $j;
55 :     for $j (0..(scalar(@{$mode_list})-1)) {
56 :     push @{$mode_list->[$j]},'';
57 :     }
58 :    
59 : jj 1765 if (! defined($displayMode) ) {$displayMode = $Global::htmlModeDefault;}
60 : sh002i 1050
61 :    
62 :     my $found = 0;
63 :     # Search through all modes to match for displayMode
64 :     # If we don't find one, found=0 will trigger warn message below
65 :     for $j (0..(scalar(@{$mode_list})-1)) {
66 :     if($mode_list->[$j]->[0] eq $displayMode) {
67 :     $mode_list->[$j]->[2] = "CHECKED";
68 :     $found=1;
69 :     last;
70 :     }
71 :     }
72 :    
73 :     for $j (@{$mode_list}) {
74 :     $out .= qq!<INPUT TYPE=RADIO NAME="Mode" VALUE="$j->[0]" $j->[2]>$j->[1]<BR>\n!;
75 :     }
76 :     if(! $found) {
77 :     my $wstr = " Error: displayMacros.pl: sub displaySelectModeLine. Unrecognized mode |$displayMode| . The acceptable modes are: ";
78 :     for $j (@{$mode_list}) {
79 :     $wstr .= " $j->[0] ";
80 :     }
81 :     warn $wstr;
82 :     }
83 :     $out;
84 :     }
85 :    
86 :     sub displaySelectModeLine {
87 :     print displaySelectModeLine_string(@_);
88 :     }
89 :     ##################################################################################################################
90 :     # Does the initial processing of the problem.
91 :     # Returns an array containing the rendered problem. #
92 :     ##################################################################################################################
93 :    
94 :     sub createDisplayedProblem {
95 :    
96 :     my ($setNumber,$probNum,$psvn,$printlinesref,$rh_flags)= @_;
97 :     my @printlines;
98 :    
99 :    
100 :     my $coursel2hDirectory = getCoursel2hDirectory();
101 :     unless(-e $coursel2hDirectory ) {
102 :     &createDirectory($coursel2hDirectory, $Global::l2h_set_directory_permission,
103 :     $Global::numericalGroupID);
104 :     }
105 :    
106 :     unless(-e "${coursel2hDirectory}set$setNumber") {
107 :     &createDirectory("${coursel2hDirectory}set$setNumber",$Global::l2h_set_directory_permission,
108 :     $Global::numericalGroupID);
109 :     }
110 :    
111 :    
112 :     my $PROBDIR = convertPath("${coursel2hDirectory}set$setNumber/$probNum-$psvn/");
113 :     my $TMPPROBDIR = convertPath("${coursel2hDirectory}$probNum-$psvn/");
114 :    
115 :     if (! -e $PROBDIR) { # no gifs of equations have been created
116 :     &l2hcreate($setNumber,$probNum,$psvn,$printlinesref);
117 :    
118 :     } else { # determine if the gifs are older than the modifications of the source file
119 :     #&attachProbSetRecord($psvn);
120 :     my $fileName = &getProblemFileName($probNum,$psvn);
121 :     $fileName = "${Global::templateDirectory}$fileName";
122 :     #print "\n\n The filename is $fileName \n\n";
123 :     my @probDirStat = stat $PROBDIR;
124 :     my @sourceFileStat = stat $fileName;
125 :     #print "\n\n The source file age is $sourceFileStat[9] \n\n";
126 :     #print "\n\n The prob dir age is $probDirStat[9] \n\n";
127 :    
128 :     if (($sourceFileStat[9] > $probDirStat[9] ) or
129 :     $rh_flags->{'refreshCachedImages'}) {
130 :     ## source file is newer or solutions should be shown recreate the l2h cache
131 :     rmDirectoryAndFiles($PROBDIR);
132 :     &l2hcreate($setNumber,$probNum,$psvn,$printlinesref);
133 :     }
134 :    
135 :    
136 :     }
137 :     #the problem has been rendered by Latex2HTML into this file:
138 :     # open(TEXXX, "${PROBDIR}${psvn}output.html") || die "Can't open ${PROBDIR}${psvn}output.html";
139 :     open(TEXXX, "${PROBDIR}${psvn}output.html") or
140 :     warn "ERROR: $0".
141 :     "Can't open the HTML file: \n ${PROBDIR}${psvn}output.html\n(allegedly)".
142 :     "translated by latex2HTML\n at displayMacros.pl, line" . __LINE__ ;
143 :    
144 :     @printlines = <TEXXX>;
145 :     push(@printlines, "The file ${PROBDIR}${psvn}output.html was empty") unless @printlines;
146 :     #print "PRINTLINES",@printlines;
147 :     close(TEXXX);
148 :    
149 :     @printlines;
150 :     }
151 :    
152 :    
153 :    
154 :     ###########################################################################################
155 :     # Formats and displays the responses to submitted answers to the problem. Returns a string. #
156 :     ###########################################################################################
157 :    
158 :     sub display_answers { # this will be put in displayMacros.pl soon.
159 :     #my ($displayCorrectAnswersQ,$showPartialCorrectAnswers,$rh_answer_results,$rh_problem_result) = @_;
160 :     my ($rh_answer_results,$rh_problem_result,$rh_flags) = @_;
161 :     my $displayCorrectAnswersQ = $rh_flags ->{displayCorrectAnswersQ};
162 :     my $showPartialCorrectAnswers = $rh_flags -> {showPartialCorrectAnswers};
163 :     my @answer_entry_order = @{$rh_flags -> {ANSWER_ENTRY_ORDER} };
164 :     my $ANSWER_PREFIX = $rh_flags -> {ANSWER_PREFIX};
165 :     my $allAnswersCorrectQ = 1;
166 :     my $printedResponse='';
167 :     ###### Print appropriate response to submitted answers
168 :     my ($i,$answerIsCorrectQ, $normalizedSubmittedAnswer,$normalizedCorrectAnswer,$ans_name,$errors);
169 :     $i=0;
170 : apizer 1351 # $printedResponse .= "\n<table border=0 cellpadding=0 cellspacing=0 bgcolor=\"#cccccc\">\n";
171 :     # replace above line by next two lines as per Davide Cervone. AKP.
172 :     $printedResponse .= "\n<table border=0 cellpadding=7 cellspacing=0 bgcolor=\"#cccccc\">\n";
173 :     $printedResponse .= "<tr><td><table border=0 cellpadding=0 cellspacing=0>\n";
174 : sh002i 1050 foreach my $key ( @answer_entry_order ) {
175 :    
176 :     $i++;
177 :     $answerIsCorrectQ = $rh_answer_results ->{$key} -> {score};
178 :     $normalizedSubmittedAnswer = $rh_answer_results ->{$key} -> {student_ans};
179 :     $normalizedSubmittedAnswer = '' if ($normalizedSubmittedAnswer =~ /^error:\s+empty/);
180 : gage 1071 $normalizedCorrectAnswer = $rh_answer_results ->{$key} -> {original_correct_ans};
181 :    
182 :     ## Handle the case where the answer evaluator does not return original_correct_ans
183 :     if ((!defined $normalizedCorrectAnswer) or (!$normalizedCorrectAnswer =~ /\S/)) {
184 :     $normalizedCorrectAnswer = $rh_answer_results ->{$key} -> {correct_ans};
185 :     }
186 :    
187 : sh002i 1050 $errors = $rh_answer_results ->{$key} -> {ans_message};
188 :     $errors = '' if ($errors eq 'empty');
189 :     #$ans_name = $rh_answer_results ->{$key} -> {ans_name};
190 :     #$ans_name =~ s/$ANSWER_PREFIX//; # this handles implicitly defined answer names.
191 :     $ans_name = $i; # just number the answers in order
192 :     $allAnswersCorrectQ = $allAnswersCorrectQ && $answerIsCorrectQ;
193 :     $printedResponse .= "\n<TR><TD align=left COLSPAN =2><em>Answer $ans_name entered:</em>--&gt; $normalizedSubmittedAnswer &lt;-- ";
194 :     $printedResponse .= "<B>Correct. </B></TD></TR>" if ($answerIsCorrectQ && $showPartialCorrectAnswers );
195 :     $printedResponse .= "<B>Incorrect. </B></TD></TR>" if (!($answerIsCorrectQ) && $showPartialCorrectAnswers);
196 : apizer 1351 $errors =~ s/\n/<BR>/g; ## convert newlines to <BR> in error messages as per Davide Cervone
197 : sh002i 1050 # change 9/2/00 by MEG -- give width in pixels rather than %.
198 :     # Some browsers break with % widht which is not the standard
199 : apizer 1351 $printedResponse .= "\n<TR> <TD align=left WIDTH = \"50\" >&nbsp;</TD><TD align=left>$errors</TD></TR>" if ($errors =~ /\w/);
200 : sh002i 1050
201 : apizer 1351 $printedResponse .= "\n<TR><TD align=left WIDTH = \"50\">&nbsp;</TD> <TD align=left><em>Correct answer:</em> $normalizedCorrectAnswer</TD></TR>" if ($displayCorrectAnswersQ);
202 : sh002i 1050
203 :     }
204 :     if ($i == 1) {
205 :     $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>The above answer is correct.</B><BR>" if ($allAnswersCorrectQ);
206 :     $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>The above answer is NOT correct.</B><BR>" if (!($allAnswersCorrectQ));
207 :     }
208 :     else {
209 :     $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>All of the above answers are correct.</B><BR>" if ($allAnswersCorrectQ);
210 :     $printedResponse .= "\n<TR><TD align=left COLSPAN =2><B>At least one of the above answers is NOT correct.</B><BR>" if (!($allAnswersCorrectQ));
211 :     }
212 :     my $percentCorr = int(100*$rh_problem_result->{score} +.5);
213 :    
214 :     $printedResponse .="\n<TR><TD align=left COLSPAN =2><B>Your score on this attempt is ${percentCorr}\%.</B><BR>";
215 : apizer 1351 # $printedResponse .= "\n</table>\n";
216 :     # replace above line by next line as per Davide Cervone. AKP.
217 :     $printedResponse .= "</td></tr>\n</table>\n</table>\n";
218 : sh002i 1050 # $printedResponse .="\n problem grader is ".$rh_problem_result->{type}." and the score is ".$rh_problem_result->{score}."<BR>\n";
219 :     $printedResponse;
220 :     }
221 :    
222 :     ###########################################################################################
223 :     # Previews submitted answers to the problem. Returns a string. #
224 :     ###########################################################################################
225 :    
226 :     sub preview_answers {
227 :     my ($rh_answer_results,$rh_problem_result,$rh_flags) = @_;
228 :     my @answer_entry_order = @{$rh_flags -> {ANSWER_ENTRY_ORDER} };
229 :     my $ANSWER_PREFIX = $rh_flags -> {ANSWER_PREFIX};
230 :     my $printedResponse ='';
231 :     ###### Print appropriate response to submitted answers
232 :     my ($i,$original_student_ans,$normalizedSubmittedAnswer,$errors,$ans_name,$preview_text_string,$preview_latex_string);
233 :     my ($ans_evaluator_type, $value_word, $error_word, $show_value);
234 :    
235 :     $i=0;
236 :     $printedResponse .= "\n<table border=0 cellpadding=0 cellspacing=0 >\n";
237 :     foreach my $key ( @answer_entry_order ) {
238 :     $i++;
239 :     $ans_name = $rh_answer_results ->{$key} -> {ans_name};
240 :     #$ans_name =~ s/$ANSWER_PREFIX//; # this handles implicitly defined answer names. #commented out by DME 6/6/2000
241 :     $original_student_ans = $rh_answer_results ->{$key} -> {original_student_ans};
242 :     $normalizedSubmittedAnswer = $rh_answer_results ->{$key} -> {student_ans};
243 :     $errors = $rh_answer_results ->{$key} -> {ans_message};
244 : apizer 1351 $errors =~ s/\n/<BR>/g; ## convert newlines to <BR> in error messages as per Davide Cervone
245 : sh002i 1050 $preview_text_string ='';
246 :     $preview_text_string = $rh_answer_results ->{$key} -> {preview_text_string}
247 :     if defined $rh_answer_results ->{$key} -> {preview_text_string};
248 :     $preview_latex_string ='';
249 :     $preview_latex_string = $rh_answer_results ->{$key} -> {preview_latex_string}
250 :     if defined $rh_answer_results ->{$key} -> {preview_latex_string};
251 :     $ans_evaluator_type = $rh_answer_results ->{$key} -> {type};
252 :     $value_word = 'value:';
253 :     $show_value = 0;
254 :     $show_value = 1 if ((($ans_evaluator_type =~ /number/) and ($normalizedSubmittedAnswer =~ /\w/)) or ($normalizedSubmittedAnswer =~ /^error/));
255 :     $show_value = 0 if ($normalizedSubmittedAnswer =~ /^error:\s+empty/);
256 :     $value_word = '' if ($normalizedSubmittedAnswer =~ /^error/);
257 :     $error_word = 'error:';
258 :     $error_word = '' if ($errors =~ /^error:/);
259 :     $printedResponse .= "\n<TR><TD align=left>Ans $i </TD>";
260 :     #$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
261 :     $printedResponse .= "\n<TD align=left><INPUT TYPE=\"text\" NAME=\"${ans_name}\" VALUE=\"$original_student_ans\" SIZE=70></TD></TR>";
262 :     $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>parsed: $preview_text_string</TD></TR>" if ($preview_text_string =~ /\w/);
263 :     $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>${value_word} $normalizedSubmittedAnswer</TD></TR>" if $show_value == 1;
264 :     $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>${error_word} $errors</TD></TR>" if (($errors =~ /\w/) and ($errors ne 'empty')) ;
265 :     if ($preview_latex_string =~ /\w/) {
266 :     $printedResponse .= "\n<TR> <TD align=left WIDTH = \"7%\" ></TD><TD align=left>";
267 :     $printedResponse .= "\n <APPLET CODE=\"HotEqn.class\" HEIGHT=\"80\" WIDTH=\"500\" ARCHIVE=\"HotEqn.zip\" NAME=\"Equation\" ALIGN=\"middle\" CODEBASE=\"$Global::appletsURL\"> ";
268 :     $printedResponse .= "\n <PARAM NAME=\"equation\" VALUE=\"$preview_latex_string\"></APPLET></TD></TR> ";
269 :     }
270 :     $printedResponse .= "\n<TR Height = 5></TR>";
271 :     }
272 :    
273 :     $printedResponse .= "\n</table>\n";
274 :     $printedResponse;
275 :     }
276 :    
277 :    
278 :     sub lc_sort { # this sorts strings with letters and number groups, alternately lexigraphically and numerically
279 :     # (lc stands for library of congress as in QA617.34R45)
280 :     my($left,$right) = @_;
281 :     # format "abcd345.57def34ABC";
282 :     # string assumed to begin with alpha
283 :     # string is split into alternating alpha and numeric groups
284 :     # numeric groups match [\d\.]+
285 :     # numeric groups assumed to contain at least one digit, ( a period alone will cause and error)
286 :     # alpha groups can contain any characters except digits and the period
287 :     # spaces in alpha groups will cause unexpected behavior
288 :     # sort is not case sensitive
289 :     # _ sorts after alpha characters
290 :    
291 :     # not case sensitive
292 :    
293 :     my @a = split( /([\d\.]+)/, $left);
294 :    
295 :     my @b = split( /([\d\.]+)/, $right);
296 :    
297 :     my $out = undef;
298 :     my $mode = 0; # even is lexic and odd is numeric
299 :     my($l,$r);
300 :     while (@a) {
301 :     $l = shift @a;
302 :     $r = shift @b;
303 :     $out = ($mode++ % 2 == 0) ? uc($l) cmp uc($r) : $l <=> $r; # lexic or numeric compare
304 :     last unless $out==0; # stop unless $l and $r are different.
305 :    
306 :     }
307 :     $out;
308 :     }
309 :    
310 :     #####################################################################
311 :     # Creates an insert which appears on the probSet page. #
312 :     #####################################################################
313 :     sub createDisplayedInsert
314 :     {
315 :     #my ($mode,$setNumber,$fileName,$psvn,$courseName,$printlinesref)= @_;
316 :     my ($setNumber,$fileName,$psvn,$courseName,$printlinesref)= @_;
317 :    
318 :     my @printlines=@$printlinesref;
319 :     my $PROBDIR;
320 :    
321 :     # if($mode eq "HTML" || $mode eq 'HTML_tth') {
322 :     # @printlines = &createProblem2($mode,$fileName,$psvn,$courseName,$sourceref);
323 :     #
324 :     # } elsif ($mode eq 'Latex2HTML') {
325 :     #latex2html processing
326 :     my $coursel2hDirectory = getCoursel2hDirectory();
327 :     unless(-e $coursel2hDirectory ) {
328 :     &createDirectory($coursel2hDirectory, $Global::l2h_set_directory_permission,
329 :     $Global::numericalGroupID);
330 :     }
331 :    
332 :     unless(-e "${coursel2hDirectory}set$setNumber") {
333 :     &createDirectory("${coursel2hDirectory}set$setNumber",$Global::l2h_set_directory_permission,
334 :     $Global::numericalGroupID);
335 :     }
336 :    
337 :     my $shortFileName = $fileName;
338 :     $shortFileName =~ s|^.*?([^\/]*)$|$1|;
339 :     $shortFileName =~ s|\..*$||;
340 :     $PROBDIR = convertPath("${coursel2hDirectory}set$setNumber/$shortFileName-$psvn/");
341 :     if (! -e $PROBDIR) {
342 :     &l2hcreate($setNumber,$shortFileName,$psvn,$printlinesref);
343 :     } else {
344 :     #&attachProbSetRecord($psvn);
345 :     my $fullFileName = "${Global::templateDirectory}$fileName";
346 :     #print "\n\n The full filename is $fullFileName \n\n";
347 :     my @probDirStat = stat $PROBDIR;
348 :     my @sourceFileStat = stat $fullFileName;
349 :     #print "\n\n The source file age is $sourceFileStat[9] \n\n";
350 :     #print "\n\n The prob dir age is $probDirStat[9] \n\n";
351 :     if ($sourceFileStat[9] > $probDirStat[9] ) { ## source file is newer
352 :     rmDirectoryAndFiles($PROBDIR);
353 :     &l2hcreate($setNumber,$shortFileName,$psvn,$printlinesref);
354 :     }
355 :     #else {&createProblem2($mode, $fileName, $psvn,$courseName,$sourceref);} ##initialize problem
356 :    
357 :     }
358 :    
359 :    
360 :     open(TEXXX, "${PROBDIR}${psvn}output.html") or
361 :     wwerror("ERROR: $0", "Can't open ${PROBDIR}${psvn}output.html",'','', '');
362 :     @printlines = <TEXXX>;
363 :     close(TEXXX);
364 :     # } else {
365 :     #
366 :     # @printlines="createDisplayedProblem: Error: Mode is not HTML, HTML_tthHTML_tth or Latex2HTML.";
367 :     #
368 :     #
369 :     # }
370 :     @printlines;
371 :     }
372 :    
373 :     ##do not need this subroutine anymore
374 :     #sub l2hcreateProb {
375 :     # my ($setNumber,$probNum,$psvn,$printlinesref)= @_;
376 :     # #my ($setNumber,$probNum,$psvn,$courseName,$printlinesref)= @_;
377 :     # #my $mode = 'Latex2HTML';
378 :     #
379 :     # #my @printlines = &createProblem($mode, $probNum, $psvn, $courseName,$sourceref,$refSubmittedAnswers);
380 :     # #my $printlinesref = \@printlines;
381 :     # my $tmpDirectory = "tmp/l2h/set$setNumber/$probNum-$psvn/";
382 :     # l2hcreate($setNumber,$probNum,$psvn,$printlinesref)
383 :     #}
384 :    
385 :     #do not use this subroutine anymore
386 :     #sub l2hcreateInsert {
387 :     # my ($setNumber,$shortFileName,$psvn,$printlinesref)= @_;
388 :     # #my $mode = 'Latex2HTML';
389 :     # #my @printlines = &createProblem2($mode, $fileName, $psvn,$courseName,$sourceref);
390 :     # #my $printlinesref = \@printlines;
391 :     # #my $shortFileName = $fileName;
392 :     # #$shortFileName =~ s|^.*?([^\/]*)$|$1|;
393 :     # #my $tmpDirectory = "tmp/l2h/set$setNumber/$shortFileName-$psvn/";
394 :     # l2hcreate($setNumber,$shortFileName,$psvn,$printlinesref)
395 :     #}
396 :    
397 :     sub l2hcreate { ## for latex2HTML 96.1 and 98.1
398 :     my ($setNumber,$probNum,$psvn,$printlinesref) = @_;
399 :    
400 :     # warn "l2hcreate is being executed displaymacros.pl line ".__LINE__;
401 :    
402 :     my $PROBDIR = convertPath(&getCoursel2hDirectory."set$setNumber/$probNum-$psvn/");
403 :     my $TMPPROBDIR = convertPath(&getCoursel2hDirectory."$probNum-$psvn/");
404 :     my $PROBURL = &getCoursel2hURL."set$setNumber/$probNum-$psvn/";
405 :    
406 :     &createDirectory($TMPPROBDIR,$Global::l2h_prob_directory_permission,$Global::numericalGroupID)
407 :     unless(-e "$TMPPROBDIR");
408 :    
409 :     open(OUTTEXFILE, ">$TMPPROBDIR${psvn}output.tex") or wwerror($0, "Can't open temporary file $TMPPROBDIR${psvn}output.tex");
410 :    
411 :     print OUTTEXFILE &texInput($Global::TEX_PROB_PREAMBLE);
412 :     print OUTTEXFILE &texInput($Global::TEX_PROB_HEADER);
413 :     print OUTTEXFILE @$printlinesref;
414 :     print OUTTEXFILE &texInput($Global::TEX_PROB_FOOTER);
415 :     close(OUTTEXFILE);
416 :    
417 :     ## Give this temporary file permission 666 in case the process dies before it it deleted 60 lines further down
418 :     chmod(0666, "$TMPPROBDIR${psvn}output.tex");
419 :    
420 :     ## 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");
421 :     my $latex2HTML_result = &makeL2H($TMPPROBDIR, $psvn) ;
422 :     warn( "LaTeX2HTML failed. Returned with status: $latex2HTML_result\n" ) if $latex2HTML_result ;
423 : gage 1071
424 : sh002i 1050 ##Get rid of all unwanted stuff in html document created by latex2html
425 :     unless(-e "${TMPPROBDIR}${psvn}output.html") {
426 :     warn "Can't rename ${TMPPROBDIR}${psvn}output.html";
427 :     return (0); ### there was a failure in latex2html processing
428 :     ### we just give a warning so that so that l2hPrecreateSet.pl can continue
429 :     }
430 :    
431 :     rename("${TMPPROBDIR}${psvn}output.html","${TMPPROBDIR}${psvn}output.html.org") or
432 :     warn "Can't rename ${TMPPROBDIR}${psvn}output.html at ". __LINE__;
433 :     open(TEXORG, "${TMPPROBDIR}${psvn}output.html.org") or
434 :     warn "Can't open ${TMPPROBDIR}${psvn}output.html.org";
435 :     my @l2hOutputArray;
436 :    
437 :    
438 :    
439 :    
440 :     BLK: { # This is protection to make absolutely sure that the line separater is set properly.
441 :     # It's still a mystery as to where this becomes defined to be something else.
442 :     local($/);
443 :     $/ = "\n";
444 :     @l2hOutputArray = <TEXORG>;
445 :    
446 :    
447 :     }
448 :    
449 :     close(TEXORG);
450 :     open(TEXNEW, ">${TMPPROBDIR}${psvn}output.html") or
451 :     wwerror($0, "Can't open ${TMPPROBDIR}${psvn}output.html",'','', '');
452 :    
453 :    
454 :     foreach (@l2hOutputArray) {
455 :     if($_ =~ /^<META/) {next;}
456 :     if($_ =~ /^<!DOCTYPE HTML PUBLIC/) {next;}
457 :     if($_ =~ /^<HTML>/) {next;}
458 :     if($_ =~ /^<HEAD>/) {next;}
459 :     if($_ =~ /^<TITLE>/) {next;}
460 :     if($_ =~ /^<LINK REL/) {next;}
461 :     if($_ =~ /^<\/HEAD>/) {next;}
462 :     if($_ =~ /^<BODY/) {next;}
463 :     if($_ =~ /^<\/BODY>/) {next;}
464 :     if($_ =~ /^<\/HTML>/) {next;}
465 :     if($_ =~ /^<BR> <HR>/) {next;}
466 :    
467 :     print TEXNEW ;
468 :     }
469 :    
470 :    
471 :     close(TEXNEW);
472 :    
473 :     ## Now do global multiline changes on whole file
474 :    
475 :     open(TEXNEW, "${TMPPROBDIR}${psvn}output.html") or
476 :     wwerror("$0", "Can't open ${TMPPROBDIR}${psvn}output.html",'','', '');
477 :     @l2hOutputArray = <TEXNEW>;
478 :     close(TEXNEW);
479 :     my $l2hOutputString = join('',@l2hOutputArray);
480 :    
481 :     ## make gif images created by latex2html locatable by server
482 :     ## NOTE: $htmlURL is defined in webworkCourse.ph . Often this will
483 :     ## will be a link appearing in a public_html_docs directory.
484 :     ## The $htmlURL, any links, and the next line must be coordinated.
485 :    
486 :     $l2hOutputString =~ s|${psvn}img|${PROBURL}${psvn}img|g;
487 :    
488 :     ## remove multiline comments
489 :     $l2hOutputString =~ s|<!--.*?-->\n||sg;
490 :    
491 :     open(TEXNEW, ">${TMPPROBDIR}${psvn}output.html") or
492 :     wwerror("$0", "Can't open ${TMPPROBDIR}${psvn}output.html",'','', '');
493 :     print TEXNEW $l2hOutputString;
494 :     close(TEXNEW);
495 :    
496 :     ## remove unneeded files
497 :    
498 :     unless ($debug) {unlink("${TMPPROBDIR}${psvn}output.html.org");}
499 :     unless ($debug) {unlink(<${TMPPROBDIR}*images.*>);}
500 :     unless ($debug) {unlink(<${TMPPROBDIR}.*.db>);}
501 :     unless ($debug) {unlink(<${TMPPROBDIR}*.db>);}
502 :     unless ($debug) {unlink(<${TMPPROBDIR}IMG_PARAMS.*>);}
503 :     unless ($debug) {unlink(<${TMPPROBDIR}*.pl>);}
504 :     unless ($debug) {unlink(<${TMPPROBDIR}*.css>);}
505 :     unless ($debug) {unlink("${TMPPROBDIR}index.html");}
506 :     unless ($debug) {unlink("${TMPPROBDIR}${psvn}output.tex");}
507 :     unless ($debug) {unlink("${TMPPROBDIR}${psvn}l2h.log");}
508 :     unless ($debug) {
509 :     my @allfiles = ();
510 :     opendir( DIRHANDLE, "$TMPPROBDIR") || warn qq/Can't read directory $TMPPROBDIR $!/;
511 :     @allfiles = map "$TMPPROBDIR$_", grep( /^l2h/, readdir DIRHANDLE);
512 :     closedir(DIRHANDLE);
513 :     my $l2hTempDir = $allfiles[0];
514 :     if (defined $l2hTempDir) {
515 :     unlink(<$l2hTempDir/*>);
516 :     rmdir ($l2hTempDir);
517 :     }
518 :     }
519 :    
520 :     ## change permission and group on remaining files
521 :     chmod($Global::l2h_data_permission, glob("${TMPPROBDIR}*"));
522 :     chown(-1,$Global::numericalGroupID,glob("${TMPPROBDIR}*"));
523 :    
524 :     ## Now that all the processing has been done, rename the $TMPPROBDIR TO $PROBDIR
525 :    
526 :     rename("$TMPPROBDIR","$PROBDIR") or
527 :     warn "Can't rename the temporary problem directory:\n $TMPPROBDIR to $PROBDIR\n at displayMacros.pl , line: " . __LINE__ ;
528 :    
529 :     }
530 :    
531 :    
532 :     #########################################################################################################
533 :     ##Subroutine that makes answers sticky in l2h mode #
534 :     # #
535 :     # INPUT: $rh_submittedAnswers Reference to a hash containing the answers submitted #
536 :     # $ra_printLines Reference to an array containing the (HTML) text to be output #
537 :     # $rh_flags Reference to a hash containing flags; specifically a #
538 :     # reference to an array containing the answer field labels #
539 :     # #
540 :     # OUTPUT: @printLines An array containing the (modified) text to be output #
541 :     # #
542 :     # OVERVIEW: l2h_sticky_answers is given HTML text, a list of submitted answers, and a list of #
543 :     # answer field labels. Its job is to retain the user's answers between submissions #
544 :     # when in typeset mode (this is handled elsewhere in the text modes). Basically, its #
545 :     # job is to act as a "filter" for the HTML text, replacing the answer fields that have #
546 :     # been reset with fields containing the previously entered answers, returning the #
547 :     # modified text. A brief high-level overview of the algorithm follows: #
548 :     # #
549 :     # ALGORITHM: The references are first dereferenced. The incoming text is first joined into #
550 :     # one string. It is then split up again, but not by line. Rather, the text is split #
551 :     # such that each array entry is either text which can be ignored, or a single #
552 :     # <INPUT...> tag. Each entry is then processed. If it is an <INPUT> tag, then it #
553 :     # must be checked for the presence of each answer field label for which a value was #
554 :     # submitted (there are many <INPUT> fields which are not answer fields, so we can't #
555 :     # assume that consecutive <INPUT> fields correspond to consecutive answer labels). #
556 :     # If a label is found, the blank value space is replaced with the appropriate #
557 :     # submitted answer (note that we can assume that there is a one-to-one correspondence #
558 :     # between answer labels and submitted answers; this is guaranteed by the specs). Radio #
559 :     # buttons and checkboxes are handled specially; see below. The modified text is then #
560 :     # added to the output string, which is split on a placeholder such that the output #
561 :     # array has the same number of entries as the input array (this is not required, but #
562 :     # might avoid some subtle bug in the future). #
563 :     # #
564 :     # NOTE: The specifications seem to require that the input text array consist of one #
565 :     # field for each line of text. However, it appears that the input is actually one #
566 :     # field, with newline characters separating lines. This function should accept #
567 :     # either form of input, although the "correct" form of one field per line has not #
568 :     # been tested. It is possible that, if input is received in this form AND the #
569 :     # newline characters have been truncated, the output could be garbled. #
570 :     # #
571 :     # --David Etlinger 6/7/2000 #
572 :     # #
573 :     # ADDED: Added a few lines of code to properly handle radio buttons. Checkboxes still need #
574 :     # to be implemented. #
575 :     # --David Etlinger 6/14/2000 #
576 :     # #
577 :     # ADDED: Added code to handle checkboxes. This is complicated because the submitted checkboxes #
578 :     # are originally stored as a single string with "\0" as a delimiter. If the input type #
579 :     # is determined to be checkboxes, the string is first split into an array. A hash key #
580 :     # in a special checkbox array is then made to point to the array. This is done because #
581 :     # there might be more than one checkbox set in a single question. Each time an input line #
582 :     # of type checkbox appears, the next value in this array is popped into a temp variable. #
583 :     # If it is determined that the line being processed corresponds to this value, the line #
584 :     # is processed (made "sticky"); otherwise, the value is pushed back on the array. The #
585 :     # fact that the number of checked cehckboxes is known but the total number of checkboxes #
586 :     # is not means that a given line of input type checkbox might or might not correspond #
587 :     # to the next value in the checkbox array. (I hope this explanation is clear enough!) #
588 :     # --David Etlinger 6/28/2000 #
589 :     #########################################################################################################
590 :    
591 :     sub l2h_sticky_answers {
592 :     my ( $rh_submittedAnswers, $ra_printLines, $rh_flags ) = @_;
593 :    
594 :     #warn ("rh_submittedAnswers = \@rh_submittedAnswers");
595 :     #warn ("ra_printLines = \@{ra_printLines}");
596 :     #warn ("rh_flags = \@{rh_flags}");
597 :    
598 :     my %submittedAnswers = %{$rh_submittedAnswers};
599 :     my @printLines = @{$ra_printLines};
600 :     my @answerLabels = @{$rh_flags -> {ANSWER_ENTRY_ORDER}};
601 :    
602 :     my $line; # holds the text of each line
603 :     my $label; # holds each answer label
604 :     my $counter = 0; # holds the index of the current answer
605 :     my $output; # holds the text the subroutine returns
606 :    
607 :     my $answer_value;
608 :    
609 :     my %checkboxAns; # holder for the checkbox multi-part answers
610 :     my $nextCheckboxAns; # temp holder for the next checkbox answer to be processed
611 :    
612 :     my $placeholder = "\x253"; # unused hex character to join text lines with
613 :    
614 :     #first, convert the array of text lines to one string...
615 :     my $text = join( "$placeholder", @printLines );
616 :    
617 :     #then, split it such that a line consists of either text
618 :     #or a single <INPUT> tag (case insensitive; note also that
619 :     #whitespace within the <INPUT> tag is accounted for).
620 :     # NOTE -- the regular expression searches for "<", then any
621 :     # amount of whitespace, then "INPUT", then any number of
622 :     # characters that aren't ">", then ">". I think that instead of
623 :     # searching for characters that aren't ">", I could have instead
624 :     # searched to match a minimal number of characters (using ?), and
625 :     # then ">". I don't know regular expressions well enough to tell
626 :     # if this might lead to some subtle difference.
627 :     my @textLines = split( m|(<\s*INPUT[^>]*>)|is, $text );
628 :     #my @textLines = split( m|(<\s*INPUT.*?>)|is, $text );
629 :    
630 :     foreach $line ( @textLines ) {
631 :     if( $line =~ m|<\s*INPUT|i ) {
632 :     foreach $label ( @answerLabels ) {
633 :     next unless exists( $submittedAnswers{$label} ); # skip if no answer was submitted.
634 :     if( $line =~ m|NAME\s*=\s*"$label"|i ) {
635 :     if( $line =~ m|TYPE\s*=\s*RADIO|i ) { #handle radio buttons
636 :     $line =~ s|VALUE\s*=\s*"$submittedAnswers{$label}"|VALUE = "$submittedAnswers{$label}" CHECKED|i;
637 :     }
638 :     elsif( $line =~ m|TYPE\s*=\s*CHECKBOX|i ) {
639 :     #make the hash key point to an anonymous array
640 :     $checkboxAns{$label} = [ split( "\0", $submittedAnswers{$label} ) ] if not exists( $checkboxAns{$label} );
641 :     if( defined $checkboxAns{$label}[0] ) {
642 :     $nextCheckboxAns = shift @{$checkboxAns{$label}};
643 :     if( $line !~ s|VALUE\s*=\s*"$nextCheckboxAns"|VALUE = "$nextCheckboxAns" CHECKED|i ) {
644 :     unshift( @{$checkboxAns{$label}}, $nextCheckboxAns ); #put the unused answer back on the list
645 :     }
646 :     }
647 :     }
648 :     else {
649 :     # we'll assume this is something else, like one or more fields.
650 :     # if it's several fields, we need to take only one answer at a time
651 :     # \0 are used to delimeter between entries.
652 :     if ($submittedAnswers{$label} =~ /\0/ ) {
653 :     my @answers = split("\0", $submittedAnswers{$label});
654 :     $answer_value = shift(@answers); # use up the first answer
655 :     $submittedAnswers{$label}=join "\0", @answers; # store the rest
656 :     $answer_value= '' unless defined($answer_value);
657 :    
658 :     }
659 :     else {
660 :     $answer_value = $submittedAnswers{$label};
661 :     }
662 :    
663 :     $line =~ s|VALUE\s*=\s*""|VALUE = "$answer_value"|i;
664 :     }
665 :     }
666 :     }
667 :     } #end if test for "<INPUT"
668 :    
669 :     $output .= $line;
670 :     } #end foreach
671 :    
672 :     @printLines = split( m|$placeholder|, $output );
673 :     return @printLines;
674 :     } #end l2h_sticky_answers()
675 :    
676 :     ## This is the old system (but newer than the one below).
677 :     ## It has been replaced for two reasons:
678 :     ## 1) It is complicated and difficult to understand or modify
679 :     ## 2) It does not work for several situations that rarely come up,
680 :     ## but must be handled properly. Specifically, it doesn't handle
681 :     ## text with more than one <INPUT> tag on a given line very well.
682 :     ## there are probably other problems, but that is the biggest.
683 :     ## --DME 6/7/2000
684 :     # # the following doubly nested loop iterates over each line,
685 :     # # and for each line searches for each answer label. Technically,
686 :     # # it might have been faster to join each entry in @printlines
687 :     # # into one string, search on that, and split it back up, but I
688 :     # # felt that the slight theoretical speed gain was not worth the
689 :     # # added complexity.
690 :     # warn "answerLabels = @answerLabels"; #DEBUG
691 :     # foreach $line ( @printLines ) {
692 :     # warn "Line is $line"; #DEBUG
693 :     # foreach $label ( @answerLabels ) {
694 :     # if( $line =~ m|<INPUT TYPE=TEXT.*NAME="$label| ) {
695 :     # while ($line =~ /VALUE = ""/) {
696 :     # # Put trailing space in displayed answer so that while loop will
697 :     # # always end. We are using the form of the s/// operator which
698 :     # # evaluates its right hand side
699 :     # $line =~ s|NAME="$label" VALUE = ""|
700 :     # $counter++;
701 :     # $submittedAnswers[$counter]=" " unless defined ($submittedAnswers[$counter])
702 :     # && not $submittedAnswers[$counter] =~ /^\s*$/;
703 :     # qq{ NAME="$label" VALUE = "$submittedAnswers[$counter]" } |e;
704 :     # # This insures that in VALUE = "$submittedAnswers[$counter]"
705 :     # # the quantity $submittedAnswers[$counter]
706 :     # # is never empty. This is required in order to terminate the loop.
707 :     # } #end while
708 :     # push( @output, $line );
709 :     # } #end if
710 :     # else {
711 :     # push( @output, $line );
712 :     # }
713 :     # } #end foreach over @answerLabels
714 :     # } #end foreach over @printLines
715 :     #
716 :     # @printLines = @output;
717 :     # } #end outer if
718 :     #
719 :     # return @printLines;
720 :     # } #end l2h_sticky_answers()
721 :    
722 :     ##subroutine that makes answers sticky in l2h mode
723 :     # this is an old version of this routine, which assumes (incorrectly)
724 :     # that answer labels begin with "AnSwEr". I've left it here just in case...
725 :     # DME 6/6/2000
726 :     #sub l2h_sticky_answers {
727 :     # my ($refSubmittedAnswers, $refprintlines)=@_;
728 :     # my @printlines=@$refprintlines;
729 :     # if ((@{$refSubmittedAnswers}!=0)) {
730 :     # my $line;
731 :     # my @output=();
732 :     # foreach $line (@printlines) {
733 :     # if ($line =~ m|<INPUT TYPE=TEXT.*NAME="AnSwEr|) {
734 :     # #print "<P>line doesn't exists<P>\n" unless defined($line);
735 :     # while ($line =~ /VALUE = ""/) {
736 :     # ## Put trailing space in displayed answer so that while loop will
737 :     # ## always end. We are using the form of the s/// operator which evaluates its right hand side
738 :     # $line =~ s|NAME="AnSwEr(\d*)" VALUE = ""|
739 :     # my $tttemp = $1;
740 :     # ${$refSubmittedAnswers}[$tttemp-1]=" " unless defined (${$refSubmittedAnswers}[$tttemp-1])
741 :     # && not ${$refSubmittedAnswers}[$tttemp-1] =~ /^\s*$/;
742 :     #
743 :     # qq{ NAME="AnSwEr$tttemp" VALUE = "${$refSubmittedAnswers}[$tttemp-1]" } |e;
744 :     # # This insures that in VALUE = "${$refSubmittedAnswers}[$tttemp-1]" the quantity ${$refSubmittedAnswers}[$tttemp-1]
745 :     # # is never empty. This is required in order to terminate the loop.
746 :     # }
747 :     # push(@output, $line);
748 :     # }
749 :     # else {
750 :     # push(@output, $line);
751 :     # }
752 :     # }
753 :     #
754 :     # @printlines = @output;
755 :     # }
756 :     #
757 :     # @printlines;
758 :     #}
759 :    
760 :     ##subroutine that updates current keys in the l2h mode
761 :    
762 :     # sub l2h_update_keys {
763 :     # my ($sessionKey, $refprintlines)= @_;
764 :     # my @printlines=@$refprintlines;
765 :     # my $line;
766 :     # my @output=();
767 :     # #my $sessionKey = $main::sessionKey;
768 :     # warn "hi lines = ",join("",@printlines);
769 :     # foreach $line (@printlines) {
770 :     # if ($line =~ m|^\s*<A(.*?)\&key=[^&]*&user|) { #<A.*&key=.*?&user
771 :     # #grab the session key from the CGI input or make it blank
772 :     # $line =~ s|^\s*<A(.*?)&key=[^&]*&user|<A$1&key=$sessionKey&user|;
773 :     # warn "line = $line<BR>";
774 :     # push(@output, $line);
775 :     # }else{
776 :     # push(@output, $line);
777 :     # }
778 :     #
779 :     # }
780 :     # @printlines;
781 :     #
782 :     # }
783 :    
784 :    
785 :     sub makeL2H {
786 :     my ($TMPPROBDIR,$psvn) =@_;
787 :     $ENV{PATH} .= "$Global::extendedPath";
788 :     if($Global::externalLaTeX2HTMLVersion eq "98.1p1") {
789 :     system("$Global::externalLaTeX2HTMLPath -no_math -init_file $Global::externalLaTeX2HTMLInit -dir $TMPPROBDIR -prefix $psvn $TMPPROBDIR${psvn}output.tex > $TMPPROBDIR${psvn}l2h.log 2>&1");
790 :     } elsif($Global::externalLaTeX2HTMLVersion eq "96.1") {
791 :     system("$Global::externalLaTeX2HTMLPath -init_file $Global::externalLaTeX2HTMLInit -dir $TMPPROBDIR -prefix $psvn $TMPPROBDIR${psvn}output.tex > $TMPPROBDIR${psvn}l2h.log");
792 :     } else {
793 :     die "Unknown LaTeX2HTML version: \$Global::externalLaTeX2HTMLVersion = $Global::externalLaTeX2HTMLVersion";
794 :     }
795 :     }
796 :    
797 :     1;

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