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1 : sh002i 1050
2 : apizer 1080
3 : sh002i 1050 ####################################################################
4 :     # Copyright @ 1995-1998 University of Rochester
5 :     # All Rights Reserved
6 :     ####################################################################
7 :    
8 :     =head1 NAME
9 :    
10 :     PGbasicmacros.pl --- located in the courseScripts directory
11 :    
12 :     =head1 SYNPOSIS
13 :    
14 :    
15 :    
16 :     =head1 DESCRIPTION
17 :    
18 :    
19 :    
20 :     =cut
21 :    
22 :     # this is equivalent to use strict, but can be used within the Safe compartment.
23 :     BEGIN{
24 : gage 1267 be_strict;
25 : sh002i 1050 }
26 :    
27 :    
28 : gage 1251 my $displayMode;
29 : sh002i 1050
30 :     my ($PAR,
31 :     $BR,
32 :     $LQ,
33 :     $RQ,
34 :     $BM,
35 :     $EM,
36 :     $BDM,
37 :     $EDM,
38 :     $LTS,
39 :     $GTS,
40 :     $LTE,
41 :     $GTE,
42 :     $BEGIN_ONE_COLUMN,
43 :     $END_ONE_COLUMN,
44 :     $SOL,
45 :     $SOLUTION,
46 :     $HINT,
47 : jj 3520 $COMMENT,
48 : sh002i 1050 $US,
49 :     $SPACE,
50 :     $BBOLD,
51 : apizer 1080 $EBOLD,
52 : sh002i 1050 $BITALIC,
53 :     $EITALIC,
54 :     $BCENTER,
55 :     $ECENTER,
56 :     $HR,
57 :     $LBRACE,
58 :     $RBRACE,
59 :     $LB,
60 :     $RB,
61 :     $DOLLAR,
62 :     $PERCENT,
63 :     $CARET,
64 :     $PI,
65 :     $E,
66 :     @ALPHABET,
67 : gage 1251 $envir,
68 : gage 1253 $PG_random_generator,
69 : gage 1267 $inputs_ref,
70 : gage 1462 $rh_sticky_answers,
71 :     $r_ans_rule_count,
72 : sh002i 1050 );
73 :    
74 :     sub _PGbasicmacros_init {
75 : gage 1251 # The big problem is that at compile time in the cached Safe compartment
76 :     # main:: has one definition, probably Safe::Root1::
77 :     # At runtime main has another definition Safe::Rootx:: where x is > 1
78 : apizer 1314
79 :     # It is important to
80 : gage 1251 # initialize the my variable version of $displayMode from the "runtime" version
81 :     # of main::displayMode
82 : apizer 1314
83 : gage 1251 $displayMode = main::PG_restricted_eval(q!$main::displayMode!);
84 :    
85 :     # This is initializes the remaining variables in the runtime main:: compartment.
86 : apizer 1314
87 : gage 1251 main::PG_restricted_eval( <<'EndOfFile');
88 : gage 1267 $displayMode = $displayMode;
89 : gage 1251
90 : gage 1286 $main::PAR = PAR();
91 :     $main::BR = BR();
92 : sh002i 1050 $main::LQ = LQ();
93 :     $main::RQ = RQ();
94 : gage 1286 $main::BM = BM();
95 :     $main::EM = EM();
96 : sh002i 1050 $main::BDM = BDM();
97 :     $main::EDM = EDM();
98 :     $main::LTS = LTS();
99 :     $main::GTS = GTS();
100 :     $main::LTE = LTE();
101 :     $main::GTE = GTE();
102 :     $main::BEGIN_ONE_COLUMN = BEGIN_ONE_COLUMN();
103 :     $main::END_ONE_COLUMN = END_ONE_COLUMN();
104 :     $main::SOL = SOLUTION_HEADING();
105 :     $main::SOLUTION = SOLUTION_HEADING();
106 :     $main::HINT = HINT_HEADING();
107 :     $main::US = US();
108 :     $main::SPACE = SPACE();
109 : gage 1286 $main::BBOLD = BBOLD();
110 :     $main::EBOLD = EBOLD();
111 : sh002i 1050 $main::BITALIC = BITALIC();
112 :     $main::EITALIC = EITALIC();
113 :     $main::BCENTER = BCENTER();
114 :     $main::ECENTER = ECENTER();
115 :     $main::HR = HR();
116 :     $main::LBRACE = LBRACE();
117 :     $main::RBRACE = RBRACE();
118 :     $main::LB = LB();
119 :     $main::RB = RB();
120 :     $main::DOLLAR = DOLLAR();
121 :     $main::PERCENT = PERCENT();
122 :     $main::CARET = CARET();
123 :     $main::PI = PI();
124 :     $main::E = E();
125 :     @main::ALPHABET = ('A'..'ZZ');
126 : gage 1462 %main::STICKY_ANSWERS = ();
127 : apizer 1080
128 : gage 1251
129 :     EndOfFile
130 :    
131 :     # Next we transfer the correct definitions in the main:: compartment to the local my variables
132 :     # This can't be done inside the eval above because my variables seem to be invisible inside the eval
133 :    
134 :    
135 : gage 1286 $PAR = PAR();
136 :     $BR = BR();
137 :     $LQ = LQ();
138 :     $RQ = RQ();
139 :     $BM = BM();
140 :     $EM = EM();
141 :     $BDM = BDM();
142 :     $EDM = EDM();
143 :     $LTS = LTS();
144 :     $GTS = GTS();
145 :     $LTE = LTE();
146 :     $GTE = GTE();
147 :     $BEGIN_ONE_COLUMN = BEGIN_ONE_COLUMN();
148 :     $END_ONE_COLUMN = END_ONE_COLUMN();
149 :     $SOL = SOLUTION_HEADING();
150 :     $SOLUTION = SOLUTION_HEADING();
151 :     $HINT = HINT_HEADING();
152 :     $US = US();
153 :     $SPACE = SPACE();
154 :     $BBOLD = BBOLD();
155 :     $EBOLD = EBOLD();
156 :     $BITALIC = BITALIC();
157 :     $EITALIC = EITALIC();
158 :     $BCENTER = BCENTER();
159 :     $ECENTER = ECENTER();
160 :     $HR = HR();
161 :     $LBRACE = LBRACE();
162 :     $RBRACE = RBRACE();
163 :     $LB = LB();
164 :     $RB = RB();
165 :     $DOLLAR = DOLLAR();
166 :     $PERCENT = PERCENT();
167 :     $CARET = CARET();
168 :     $PI = PI();
169 :     $E = E();
170 :     @ALPHABET = ('A'..'ZZ');
171 : sh002i 1050
172 : gage 1253 $envir = PG_restricted_eval(q!\%main::envir!);
173 :     $PG_random_generator = PG_restricted_eval(q!$main::PG_random_generator!);
174 : gage 1267 $inputs_ref = $envir{inputs_ref};
175 : gage 1462 $rh_sticky_answers = PG_restricted_eval(q!\%main::STICKY_ANSWERS!);
176 :     $r_ans_rule_count = PG_restricted_eval(q!\$ans_rule_count!);
177 : sh002i 1050 }
178 :    
179 :     =head2 Answer blank macros:
180 :    
181 :     These produce answer blanks of various sizes or pop up lists or radio answer buttons.
182 :     The names for the answer blanks are
183 :     generated implicitly.
184 :    
185 :     ans_rule( width )
186 :     tex_ans_rule( width )
187 :     ans_radio_buttons(value1=>label1, value2,label2 => value3,label3=>...)
188 :     pop_up_list(@list) # list consists of (value => label, PR => "Product rule",...)
189 :    
190 :     To indicate the checked position of radio buttons put a '%' in front of the value: C<ans_radio_buttons(1, 'Yes','%2','No')>
191 :     will have 'No' checked. C<tex_ans_rule> works inside math equations in C<HTML_tth> mode. It does not work in C<Latex2HTML> mode
192 :     since this mode produces gif pictures.
193 :    
194 :    
195 :     The following method is defined in F<PG.pl> for entering the answer evaluators corresponding
196 :     to answer rules with automatically generated names. The answer evaluators are matched with the
197 :     answer rules in the order in which they appear on the page.
198 :    
199 :     ANS(ans_evaluator1, ans_evaluator2,...);
200 :    
201 :     These are more primitive macros which produce answer blanks for specialized cases when complete
202 :     control over the matching of answers blanks and answer evaluators is desired.
203 :     The names of the answer blanks must be generated manually, and it is best if they do NOT begin
204 :     with the default answer prefix (currently AnSwEr).
205 :    
206 :     labeled_ans_rule(name, width) # an alias for NAMED_ANS_RULE where width defaults to 20 if omitted.
207 :    
208 :     NAMED_ANS_RULE(name, width)
209 :     NAMED_ANS_BOX(name, rows, cols)
210 :     NAMED_ANS_RADIO(name, value,label,)
211 :     NAMED_ANS_RADIO_EXTENSION(name, value,label)
212 :     NAMED_ANS_RADIO_BUTTONS(name,value1,label1,value2,label2,...)
213 :     check_box('-name' =>answer5,'-value' =>'statement3','-label' =>'I loved this course!' )
214 :     NAMED_POP_UP_LIST($name, @list) # list consists of (value => tag, PR => "Product rule",...)
215 :    
216 :     (Name is the name of the variable, value is the value given to the variable when this option is selected,
217 :     and label is the text printed next to the button or check box. Check box variables can have multiple values.)
218 :    
219 :     NAMED_ANS_RADIO_BUTTONS creates a sequence of NAMED_ANS_RADIO and NAMED_ANS_RADIO_EXTENSION items which
220 :     are output either as an array or, in scalar context, as the array glued together with spaces. It is
221 :     usually easier to use this than to manually construct the radio buttons by hand. However, sometimes
222 :     extra flexibility is desiredin which case:
223 :    
224 :     When entering radio buttons using the "NAMED" format, you should use NAMED_ANS_RADIO button for the first button
225 :     and then use NAMED_ANS_RADIO_EXTENSION for the remaining buttons. NAMED_ANS_RADIO requires a matching answer evalutor,
226 :     while NAMED_ANS_RADIO_EXTENSION does not. The name used for NAMED_ANS_RADIO_EXTENSION should match the name
227 :     used for NAMED_ANS_RADIO (and the associated answer evaluator).
228 :    
229 :    
230 :     The following method is defined in F<PG.pl> for entering the answer evaluators corresponding
231 :     to answer rules with automatically generated names. The answer evaluators are matched with the
232 :     answer rules in the order in which they appear on the page.
233 :    
234 :     NAMED_ANS(name1 => ans_evaluator1, name2 => ans_evaluator2,...);
235 :    
236 :     These auxiliary macros are defined in PG.pl
237 :    
238 :    
239 :     NEW_ANS_NAME( number ); # produces a new answer blank name from a number by adding a prefix (AnSwEr)
240 :     # and registers this name as an implicitly labeled answer
241 :     # Its use is paired with each answer evaluator being entered using ANS()
242 :    
243 :     ANS_NUM_TO_NAME(number); # adds the prefix (AnSwEr) to the number, but does nothing else.
244 :    
245 :     RECORD_ANS_NAME( name ); # records the order in which the answer blank is rendered
246 :     # This is called by all of the constructs above, but must
247 :     # be called explicitly if an input blank is constructed explictly
248 :     # using HTML code.
249 :    
250 :     These are legacy macros:
251 :    
252 :     ANS_RULE( number, width ); # equivalent to NAMED_ANS_RULE( NEW_ANS_NAME(number), width)
253 :     ANS_BOX( question_number,height, width ); # equivalent to NAMED_ANS_BOX( NEW_ANS_NAME(number), height, width)
254 :     ANS_RADIO( question_number, value,tag ); # equivalent to NAMED_ANS_RADIO( NEW_ANS_NAME(number), value,tag)
255 :     ANS_RADIO_OPTION( question_number, value,tag ); # equivalent to NAMED_ANS_RADIO_EXTENSION( ANS_NUM_TO_NAME(number), value,tag)
256 :    
257 :    
258 :     =cut
259 :    
260 : gage 1267
261 :    
262 : sh002i 1050 sub labeled_ans_rule { # syntactic sugar for NAMED_ANS_RULE
263 :     my($name,$col) = @_;
264 :     $col = 20 unless defined($col);
265 :     NAMED_ANS_RULE($name,$col);
266 :     }
267 :    
268 :     sub NAMED_ANS_RULE {
269 :     my($name,$col) = @_;
270 :     my $answer_value = '';
271 : gage 1267 $answer_value = ${$inputs_ref}{$name} if defined(${$inputs_ref}{$name});
272 : sh002i 1050 if ($answer_value =~ /\0/ ) {
273 :     my @answers = split("\0", $answer_value);
274 :     $answer_value = shift(@answers); # use up the first answer
275 : gage 1462 $rh_sticky_answers->{$name}=\@answers;
276 : apizer 1314 # store the rest -- beacuse this stores to a main:; variable
277 :     # it must be evaluated at run time
278 : sh002i 1050 $answer_value= '' unless defined($answer_value);
279 :     } elsif (ref($answer_value) eq 'ARRAY') {
280 :     my @answers = @{ $answer_value};
281 :     $answer_value = shift(@answers); # use up the first answer
282 : gage 1462 $rh_sticky_answers->{$name}=\@answers;
283 : apizer 1314 # store the rest -- beacuse this stores to a main:; variable
284 :     # it must be evaluated at run time
285 : sh002i 1050 $answer_value= '' unless defined($answer_value);
286 : apizer 1080 }
287 :    
288 : apizer 1314 $answer_value =~ tr/\\$@`//d; ## make sure student answers can not be interpolated by e.g. EV3
289 : sh002i 1050 $name = RECORD_ANS_NAME($name);
290 : apizer 1379
291 : apizer 1385 my $tcol = $col/2 > 3 ? $col/2 : 3; ## get max
292 :     $tcol = $tcol < 40 ? $tcol : 40; ## get min
293 : apizer 1379
294 : sh002i 1050 MODES(
295 : apizer 1379 TeX => "\\mbox{\\parbox[t]{${tcol}ex}{\\hrulefill}}",
296 :     Latex2HTML => qq!\\begin{rawhtml}<INPUT TYPE=TEXT SIZE=$col NAME=\"$name\" VALUE = \"\">\\end{rawhtml}!,
297 : dpvc 2292 HTML => qq!<INPUT TYPE=TEXT SIZE=$col NAME="$name" VALUE="$answer_value">!.
298 :     qq!<INPUT TYPE=HIDDEN NAME="previous_$name" VALUE="$answer_value">!
299 : sh002i 1050 );
300 :     }
301 :    
302 :     sub NAMED_ANS_RULE_OPTION { # deprecated
303 :     &NAMED_ANS_RULE_EXTENSION;
304 :     }
305 :    
306 :     sub NAMED_ANS_RULE_EXTENSION {
307 :     my($name,$col) = @_;
308 :     my $answer_value = '';
309 : gage 1267 $answer_value = ${$inputs_ref}{$name} if defined(${$inputs_ref}{$name});
310 : gage 1462 if ( defined( $rh_sticky_answers->{$name} ) ) {
311 :     $answer_value = shift( @{ $rh_sticky_answers->{$name} });
312 : sh002i 1050 $answer_value = '' unless defined($answer_value);
313 :     }
314 : apizer 1314 $answer_value =~ tr/\\$@`//d; ## make sure student answers can not be interpolated by e.g. EV3
315 : dpvc 3268 my $tcol = $col/2 > 3 ? $col/2 : 3; ## get max
316 :     $tcol = $tcol < 40 ? $tcol : 40; ## get min
317 : sh002i 1050 MODES(
318 : dpvc 3268 TeX => "\\mbox{\\parbox[t]{${tcol}ex}{\\hrulefill}}",
319 : sh002i 1050 Latex2HTML => qq!\\begin{rawhtml}\n<INPUT TYPE=TEXT SIZE=$col NAME=\"$name\" VALUE = \"\">\n\\end{rawhtml}\n!,
320 : dpvc 3268 HTML => qq!<INPUT TYPE=TEXT SIZE=$col NAME = "$name" VALUE = "$answer_value">!.
321 :     qq!<INPUT TYPE=HIDDEN NAME="previous_$name" VALUE = "$answer_value">!
322 : sh002i 1050 );
323 :     }
324 :    
325 :     sub ANS_RULE { #deprecated
326 :     my($number,$col) = @_;
327 :     my $name = NEW_ANS_NAME($number);
328 :     NAMED_ANS_RULE($name,$col);
329 :     }
330 :    
331 :    
332 :     sub NAMED_ANS_BOX {
333 :     my($name,$row,$col) = @_;
334 :     $row = 10 unless defined($row);
335 :     $col = 80 unless defined($col);
336 :     $name = RECORD_ANS_NAME($name);
337 :     my $height = .07*$row;
338 :     my $answer_value = '';
339 : gage 1267 $answer_value = $inputs_ref->{$name} if defined( $inputs_ref->{$name} );
340 : apizer 1314 $answer_value =~ tr/\\$@`//d; ## make sure student answers can not be interpolated by e.g. EV3
341 : sh002i 1050 my $out = M3(
342 :     qq!\\vskip $height in \\hrulefill\\quad !,
343 :     qq!\\begin{rawhtml}<TEXTAREA NAME="$name" ROWS="$row" COLS="$col"
344 :     WRAP="VIRTUAL">$answer_value</TEXTAREA>\\end{rawhtml}!,
345 :     qq!<TEXTAREA NAME="$name" ROWS="$row" COLS="$col"
346 : gage 2061 WRAP="VIRTUAL">$answer_value</TEXTAREA>
347 :     <INPUT TYPE=HIDDEN NAME="previous_$name" VALUE = "$answer_value">
348 :     !
349 : sh002i 1050 );
350 :     $out;
351 :     }
352 :    
353 :     sub ANS_BOX { #deprecated
354 :     my($number,$row,$col) = @_;
355 :     my $name = NEW_ANS_NAME($number);
356 :     NAMED_ANS_BOX($name,$row,$col);
357 :     }
358 :    
359 :     sub NAMED_ANS_RADIO {
360 :     my $name = shift;
361 :     my $value = shift;
362 :     my $tag =shift;
363 :     $name = RECORD_ANS_NAME($name);
364 :     my $checked = '';
365 :     if ($value =~/^\%/) {
366 :     $value =~ s/^\%//;
367 :     $checked = 'CHECKED'
368 :     }
369 : gage 1267 if (defined($inputs_ref->{$name}) ) {
370 :     if ($inputs_ref->{$name} eq $value) {
371 : sh002i 1050 $checked = 'CHECKED'
372 :     } else {
373 :     $checked = '';
374 :     }
375 :    
376 :     }
377 :    
378 :     MODES(
379 :     TeX => qq!\\item{$tag}\n!,
380 :     Latex2HTML => qq!\\begin{rawhtml}\n<INPUT TYPE=RADIO NAME="$name" VALUE="$value" $checked>\\end{rawhtml}$tag!,
381 :     HTML => qq!<INPUT TYPE=RADIO NAME="$name" VALUE="$value" $checked>$tag!
382 :     );
383 :    
384 :     }
385 :    
386 :     sub NAMED_ANS_RADIO_OPTION { #deprecated
387 :     &NAMED_ANS_RADIO_EXTENSION;
388 :     }
389 :    
390 :     sub NAMED_ANS_RADIO_EXTENSION {
391 :     my $name = shift;
392 :     my $value = shift;
393 :     my $tag =shift;
394 :    
395 :    
396 :     my $checked = '';
397 :     if ($value =~/^\%/) {
398 :     $value =~ s/^\%//;
399 :     $checked = 'CHECKED'
400 :     }
401 : gage 1267 if (defined($inputs_ref->{$name}) ) {
402 :     if ($inputs_ref->{$name} eq $value) {
403 : sh002i 1050 $checked = 'CHECKED'
404 :     } else {
405 :     $checked = '';
406 :     }
407 :    
408 :     }
409 :    
410 :     MODES(
411 :     TeX => qq!\\item{$tag}\n!,
412 :     Latex2HTML => qq!\\begin{rawhtml}\n<INPUT TYPE=RADIO NAME="$name" VALUE="$value" $checked>\\end{rawhtml}$tag!,
413 :     HTML => qq!<INPUT TYPE=RADIO NAME="$name" VALUE="$value" $checked>$tag!
414 :     );
415 :    
416 :     }
417 :    
418 :     sub NAMED_ANS_RADIO_BUTTONS {
419 :     my $name =shift;
420 :     my $value = shift;
421 :     my $tag = shift;
422 :    
423 :    
424 :     my @out = ();
425 :     push(@out, NAMED_ANS_RADIO($name, $value,$tag));
426 :     my @buttons = @_;
427 :     while (@buttons) {
428 :     $value = shift @buttons; $tag = shift @buttons;
429 :     push(@out, NAMED_ANS_RADIO_OPTION($name, $value,$tag));
430 :     }
431 :     (wantarray) ? @out : join(" ",@out);
432 :     }
433 :     sub ANS_RADIO {
434 :     my $number = shift;
435 :     my $value = shift;
436 :     my $tag =shift;
437 :     my $name = NEW_ANS_NAME($number);
438 :     NAMED_ANS_RADIO($name,$value,$tag);
439 :     }
440 :    
441 :     sub ANS_RADIO_OPTION {
442 :     my $number = shift;
443 :     my $value = shift;
444 :     my $tag =shift;
445 :    
446 :    
447 :     my $name = ANS_NUM_TO_NAME($number);
448 :     NAMED_ANS_RADIO_OPTION($name,$value,$tag);
449 :     }
450 :     sub ANS_RADIO_BUTTONS {
451 :     my $number =shift;
452 :     my $value = shift;
453 :     my $tag = shift;
454 :    
455 :    
456 :     my @out = ();
457 :     push(@out, ANS_RADIO($number, $value,$tag));
458 :     my @buttons = @_;
459 :     while (@buttons) {
460 :     $value = shift @buttons; $tag = shift @buttons;
461 :     push(@out, ANS_RADIO_OPTION($number, $value,$tag));
462 :     }
463 :     (wantarray) ? @out : join(" ",@out);
464 :     }
465 : gage 1784 ##############################################
466 :     # contained_in( $elem, $array_reference or null separated string);
467 :     # determine whether element is equal
468 :     # ( in the sense of eq, not ==, ) to an element in the array.
469 :     ##############################################
470 :     sub contained_in {
471 :     my $element = shift;
472 :     my @input_list = @_;
473 :     my @output_list = ();
474 :     # Expand the list -- convert references to arrays to arrays
475 :     # Convert null separated strings to arrays
476 :     foreach my $item (@input_list ) {
477 :     if ($item =~ /\0/) {
478 :     push @output_list, split('\0', $item);
479 :     } elsif (ref($item) =~/ARRAY/) {
480 :     push @output_list, @{$item};
481 :     } else {
482 :     push @output_list, $item;
483 :     }
484 :     }
485 :    
486 :     my @match_list = grep {$element eq $_ } @output_list;
487 :     if ( @match_list ) {
488 :     return 1;
489 :     } else {
490 :     return 0;
491 :     }
492 :     }
493 : sh002i 1050
494 : gage 1784 ##########################
495 :     # If multiple boxes are checked then the $inputs_ref->{name }will be a null separated string
496 :     # or a reference to an array.
497 :     ##########################
498 :    
499 : sh002i 1050 sub NAMED_ANS_CHECKBOX {
500 :     my $name = shift;
501 :     my $value = shift;
502 :     my $tag =shift;
503 :     $name = RECORD_ANS_NAME($name);
504 :    
505 :     my $checked = '';
506 :     if ($value =~/^\%/) {
507 :     $value =~ s/^\%//;
508 :     $checked = 'CHECKED'
509 :     }
510 :    
511 : gage 1267 if (defined($inputs_ref->{$name}) ) {
512 : gage 1784 if ( contained_in($value, $inputs_ref->{$name} ) ) {
513 : sh002i 1050 $checked = 'CHECKED'
514 :     }
515 :     else {
516 :     $checked = '';
517 :     }
518 :    
519 :     }
520 :    
521 :     MODES(
522 :     TeX => qq!\\item{$tag}\n!,
523 :     Latex2HTML => qq!\\begin{rawhtml}\n<INPUT TYPE=CHECKBOX NAME="$name" VALUE="$value" $checked>\\end{rawhtml}$tag!,
524 :     HTML => qq!<INPUT TYPE=CHECKBOX NAME="$name" VALUE="$value" $checked>$tag!
525 :     );
526 :    
527 :     }
528 :    
529 :     sub NAMED_ANS_CHECKBOX_OPTION {
530 :     my $name = shift;
531 :     my $value = shift;
532 :     my $tag =shift;
533 :    
534 :     my $checked = '';
535 :     if ($value =~/^\%/) {
536 :     $value =~ s/^\%//;
537 :     $checked = 'CHECKED'
538 :     }
539 :    
540 : gage 1267 if (defined($inputs_ref->{$name}) ) {
541 : gage 1784 if ( contained_in($value, $inputs_ref->{$name}) ) {
542 : sh002i 1050 $checked = 'CHECKED'
543 :     }
544 :     else {
545 :     $checked = '';
546 :     }
547 :    
548 :     }
549 :    
550 :     MODES(
551 :     TeX => qq!\\item{$tag}\n!,
552 :     Latex2HTML => qq!\\begin{rawhtml}\n<INPUT TYPE=CHECKBOX NAME="$name" VALUE="$value" $checked>\\end{rawhtml}$tag!,
553 :     HTML => qq!<INPUT TYPE=CHECKBOX NAME="$name" VALUE="$value" $checked>$tag!
554 :     );
555 :    
556 :     }
557 :    
558 :     sub NAMED_ANS_CHECKBOX_BUTTONS {
559 :     my $name =shift;
560 :     my $value = shift;
561 :     my $tag = shift;
562 :    
563 :     my @out = ();
564 :     push(@out, NAMED_ANS_CHECKBOX($name, $value,$tag));
565 :    
566 :     my @buttons = @_;
567 :     while (@buttons) {
568 :     $value = shift @buttons; $tag = shift @buttons;
569 :     push(@out, NAMED_ANS_CHECKBOX_OPTION($name, $value,$tag));
570 :     }
571 :    
572 :     (wantarray) ? @out : join(" ",@out);
573 :     }
574 :    
575 :     sub ANS_CHECKBOX {
576 :     my $number = shift;
577 :     my $value = shift;
578 :     my $tag =shift;
579 :     my $name = NEW_ANS_NAME($number);
580 :    
581 :     NAMED_ANS_CHECKBOX($name,$value,$tag);
582 :     }
583 :    
584 :     sub ANS_CHECKBOX_OPTION {
585 :     my $number = shift;
586 :     my $value = shift;
587 :     my $tag =shift;
588 :     my $name = ANS_NUM_TO_NAME($number);
589 :    
590 :     NAMED_ANS_CHECKBOX_OPTION($name,$value,$tag);
591 :     }
592 :    
593 : gage 1784
594 :    
595 : sh002i 1050 sub ANS_CHECKBOX_BUTTONS {
596 :     my $number =shift;
597 :     my $value = shift;
598 :     my $tag = shift;
599 :    
600 :     my @out = ();
601 :     push(@out, ANS_CHECKBOX($number, $value, $tag));
602 :    
603 :     my @buttons = @_;
604 :     while (@buttons) {
605 :     $value = shift @buttons; $tag = shift @buttons;
606 :     push(@out, ANS_CHECKBOX_OPTION($number, $value,$tag));
607 :     }
608 :    
609 :     (wantarray) ? @out : join(" ",@out);
610 :     }
611 :    
612 :     sub ans_rule {
613 :     my $len = shift; # gives the optional length of the answer blank
614 :     $len = 20 unless $len ;
615 : gage 1267 my $name = NEW_ANS_NAME(inc_ans_rule_count());
616 : sh002i 1050 NAMED_ANS_RULE($name ,$len);
617 :     }
618 :     sub ans_rule_extension {
619 :     my $len = shift;
620 :     $len = 20 unless $len ;
621 : gage 1462 my $name = NEW_ANS_NAME($$r_ans_rule_count); # don't update the answer name
622 : sh002i 1050 NAMED_ANS_RULE($name ,$len);
623 :     }
624 :     sub ans_radio_buttons {
625 : gage 1267 my $name = NEW_ANS_NAME(inc_ans_rule_count());
626 : sh002i 1050 my @radio_buttons = NAMED_ANS_RADIO_BUTTONS($name, @_);
627 :    
628 :     if ($displayMode eq 'TeX') {
629 :     $radio_buttons[0] = "\n\\begin{itemize}\n" . $radio_buttons[0];
630 :     $radio_buttons[$#radio_buttons] .= "\n\\end{itemize}\n";
631 :     }
632 :    
633 :     (wantarray) ? @radio_buttons: join(" ", @radio_buttons);
634 :     }
635 :    
636 :     #added 6/14/2000 by David Etlinger
637 :     sub ans_checkbox {
638 : gage 1267 my $name = NEW_ANS_NAME( inc_ans_rule_count() );
639 : sh002i 1050 my @checkboxes = NAMED_ANS_CHECKBOX_BUTTONS( $name, @_ );
640 :    
641 :     if ($displayMode eq 'TeX') {
642 :     $checkboxes[0] = "\n\\begin{itemize}\n" . $checkboxes[0];
643 :     $checkboxes[$#checkboxes] .= "\n\\end{itemize}\n";
644 :     }
645 :    
646 :     (wantarray) ? @checkboxes: join(" ", @checkboxes);
647 :     }
648 :    
649 :    
650 :     ## define a version of ans_rule which will work inside TeX math mode or display math mode -- at least for tth mode.
651 :     ## This is great for displayed fractions.
652 :     ## This will not work with latex2HTML mode since it creates gif equations.
653 :    
654 :     sub tex_ans_rule {
655 :     my $len = shift;
656 :     $len = 20 unless $len ;
657 : gage 1267 my $name = NEW_ANS_NAME(inc_ans_rule_count());
658 : sh002i 1050 my $answer_rule = NAMED_ANS_RULE($name ,$len); # we don't want to create three answer rules in different modes.
659 :     my $out = MODES(
660 :     'TeX' => $answer_rule,
661 :     'Latex2HTML' => '\\fbox{Answer boxes cannot be placed inside typeset equations}',
662 :     'HTML_tth' => '\\begin{rawhtml} '. $answer_rule.'\\end{rawhtml}',
663 :     'HTML_dpng' => '\\fbox{Answer boxes cannot be placed inside typeset equations}',
664 :     'HTML' => $answer_rule
665 :     );
666 : apizer 1080
667 : sh002i 1050 $out;
668 :     }
669 :     sub tex_ans_rule_extension {
670 :     my $len = shift;
671 :     $len = 20 unless $len ;
672 : gage 1462 my $name = NEW_ANS_NAME($$r_ans_rule_count);
673 : sh002i 1050 my $answer_rule = NAMED_ANS_RULE($name ,$len); # we don't want to create three answer rules in different modes.
674 :     my $out = MODES(
675 :     'TeX' => $answer_rule,
676 :     'Latex2HTML' => '\fbox{Answer boxes cannot be placed inside typeset equations}',
677 :     'HTML_tth' => '\\begin{rawhtml} '. $answer_rule.'\\end{rawhtml}',
678 :     'HTML_dpng' => '\fbox{Answer boxes cannot be placed inside typeset equations}',
679 :     'HTML' => $answer_rule
680 :     );
681 : apizer 1080
682 : sh002i 1050 $out;
683 :     }
684 :     # still needs some cleanup.
685 :     sub NAMED_TEX_ANS_RULE {
686 :     my $name = shift;
687 :     my $len = shift;
688 :     $len = 20 unless $len ;
689 :     my $answer_rule = NAMED_ANS_RULE($name ,$len); # we don't want to create three answer rules in different modes.
690 :     my $out = MODES(
691 :     'TeX' => $answer_rule,
692 :     'Latex2HTML' => '\\fbox{Answer boxes cannot be placed inside typeset equations}',
693 :     'HTML_tth' => '\\begin{rawhtml} '. $answer_rule.'\\end{rawhtml}',
694 :     'HTML_dpng' => '\\fbox{Answer boxes cannot be placed inside typeset equations}',
695 :     'HTML' => $answer_rule
696 :     );
697 : apizer 1080
698 : sh002i 1050 $out;
699 :     }
700 :     sub NAMED_TEX_ANS_RULE_EXTENSION {
701 :     my $name = shift;
702 :     my $len = shift;
703 :     $len = 20 unless $len ;
704 :     my $answer_rule = NAMED_ANS_RULE_EXTENSION($name ,$len); # we don't want to create three answer rules in different modes.
705 :     my $out = MODES(
706 :     'TeX' => $answer_rule,
707 :     'Latex2HTML' => '\fbox{Answer boxes cannot be placed inside typeset equations}',
708 :     'HTML_tth' => '\\begin{rawhtml} '. $answer_rule.'\\end{rawhtml}',
709 :     'HTML_dpng' => '\fbox{Answer boxes cannot be placed inside typeset equations}',
710 :     'HTML' => $answer_rule
711 :     );
712 : apizer 1080
713 : sh002i 1050 $out;
714 :     }
715 :     sub ans_box {
716 :     my $row = shift;
717 :     my $col =shift;
718 :     $row = 5 unless $row;
719 :     $col = 80 unless $col;
720 : gage 1267 my $name = NEW_ANS_NAME(inc_ans_rule_count());
721 : sh002i 1050 NAMED_ANS_BOX($name ,$row,$col);
722 :     }
723 :    
724 :     #this is legacy code; use ans_checkbox instead
725 :     sub checkbox {
726 :     my %options = @_;
727 :     qq!<INPUT TYPE="checkbox" NAME="$options{'-name'}" VALUE="$options{'-value'}">$options{'-label'}!
728 :     }
729 :    
730 :    
731 :     sub NAMED_POP_UP_LIST {
732 :     my $name = shift;
733 :     my @list = @_;
734 :     $name = RECORD_ANS_NAME($name); # record answer name
735 :     my $answer_value = '';
736 : gage 1267 $answer_value = ${$inputs_ref}{$name} if defined(${$inputs_ref}{$name});
737 : sh002i 1050 my $out = "";
738 :     if ($displayMode eq 'HTML' or $displayMode eq 'HTML_tth' or
739 : dpvc 2199 $displayMode eq 'HTML_dpng' or $displayMode eq 'HTML_img' or $displayMode eq 'HTML_jsMath' or $displayMode eq 'HTML_asciimath') {
740 : sh002i 1050 $out = qq!<SELECT NAME = "$name" SIZE=1> \n!;
741 :     my $i;
742 :     foreach ($i=0; $i< @list; $i=$i+2) {
743 :     my $select_flag = ($list[$i] eq $answer_value) ? "SELECTED" : "";
744 :     $out .= qq!<OPTION $select_flag VALUE ="$list[$i]" > $list[$i+1] </OPTION>\n!;
745 :     };
746 :     $out .= " </SELECT>\n";
747 :     } elsif ( $displayMode eq "Latex2HTML") {
748 :     $out = qq! \\begin{rawhtml}<SELECT NAME = "$name" SIZE=1> \\end{rawhtml} \n !;
749 :     my $i;
750 :     foreach ($i=0; $i< @list; $i=$i+2) {
751 :     my $select_flag = ($list[$i] eq $answer_value) ? "SELECTED" : "";
752 :     $out .= qq!\\begin{rawhtml}<OPTION $select_flag VALUE ="$list[$i]" > $list[$i+1] </OPTION>\\end{rawhtml}\n!;
753 :     };
754 :     $out .= " \\begin{rawhtml}</SELECT>\\end{rawhtml}\n";
755 :     } elsif ( $displayMode eq "TeX") {
756 :     $out .= "\\fbox{?}";
757 :     }
758 :    
759 :     }
760 :    
761 :     sub pop_up_list {
762 :     my @list = @_;
763 : gage 1267 my $name = NEW_ANS_NAME(inc_ans_rule_count()); # get new answer name
764 : sh002i 1050 NAMED_POP_UP_LIST($name, @list);
765 :     }
766 :    
767 : lr003k 1120
768 :    
769 :     =head5 answer_matrix
770 :    
771 :     Usage \[ \{ answer_matrix(rows,columns,width_of_ans_rule, @options) \} \]
772 : apizer 1314
773 : lr003k 1120 Creates an array of answer blanks and passes it to display_matrix which returns
774 :     text which represents the matrix in TeX format used in math display mode. Answers
775 :     are then passed back to whatever answer evaluators you write at the end of the problem.
776 :     (note, if you have an m x n matrix, you will need mn answer evaluators, and they will be
777 : apizer 1314 returned to the evaluaters starting in the top left hand corner and proceed to the left
778 : lr003k 1120 and then at the end moving down one row, just as you would read them.)
779 : apizer 1314
780 : lr003k 1120 The options are passed on to display_matrix.
781 :    
782 :    
783 :     =cut
784 :    
785 :    
786 :     sub answer_matrix{
787 :     my $m = shift;
788 :     my $n = shift;
789 :     my $width = shift;
790 :     my @options = @_;
791 :     my @array=();
792 :     for( my $i = 0; $i < $m; $i+=1)
793 :     {
794 :     my @row_array = ();
795 : apizer 1314
796 : lr003k 1120 for( my $i = 0; $i < $n; $i+=1)
797 :     {
798 :     push @row_array, ans_rule($width);
799 : apizer 1314 }
800 : lr003k 1120 my $r_row_array = \@row_array;
801 :     push @array, $r_row_array;
802 :     }
803 : gage 1251 # display_matrix hasn't been loaded into the cache safe compartment
804 :     # so we need to refer to the subroutine in this way to make
805 :     # sure that main is defined correctly.
806 :     my $ra_local_display_matrix=PG_restricted_eval(q!\&main::display_matrix!);
807 :     &$ra_local_display_matrix( \@array, @options );
808 : apizer 1314
809 : lr003k 1120 }
810 :    
811 :     sub NAMED_ANS_ARRAY_EXTENSION{
812 : apizer 1314
813 : lr003k 1120 my $name = shift;
814 :     my $col = shift;
815 :     $col = 20 unless $col;
816 :     my $answer_value = '';
817 : apizer 1314
818 : gage 1267 $answer_value = ${$inputs_ref}{$name} if defined(${$inputs_ref}{$name});
819 : lr003k 1120 if ($answer_value =~ /\0/ ) {
820 :     my @answers = split("\0", $answer_value);
821 : apizer 1314 $answer_value = shift(@answers);
822 : lr003k 1120 $answer_value= '' unless defined($answer_value);
823 :     } elsif (ref($answer_value) eq 'ARRAY') {
824 :     my @answers = @{ $answer_value};
825 : apizer 1314 $answer_value = shift(@answers);
826 : lr003k 1120 $answer_value= '' unless defined($answer_value);
827 :     }
828 : apizer 1314
829 :     $answer_value =~ tr/\\$@`//d; ## make sure student answers can not be interpolated by e.g. EV3
830 : lr003k 1120 MODES(
831 :     TeX => "\\mbox{\\parbox[t]{10pt}{\\hrulefill}}\\hrulefill\\quad ",
832 :     Latex2HTML => qq!\\begin{rawhtml}\n<INPUT TYPE=TEXT SIZE=$col NAME=\"$name\" VALUE = \"\">\n\\end{rawhtml}\n!,
833 :     HTML => "<INPUT TYPE=TEXT SIZE=$col NAME=\"$name\" VALUE = \"$answer_value\">\n"
834 :     );
835 :     }
836 :    
837 :     sub ans_array{
838 :     my $m = shift;
839 :     my $n = shift;
840 :     my $col = shift;
841 :     $col = 20 unless $col;
842 : gage 1267 my $num = inc_ans_rule_count() ;
843 : lr003k 1120 my $name = NEW_ANS_ARRAY_NAME($num,0,0);
844 :     my @options = @_;
845 :     my @array=();
846 :     my $string;
847 :     my $answer_value = "";
848 : apizer 1314
849 : lr003k 1120 $array[0][0] = NAMED_ANS_RULE($name,$col);
850 : apizer 1314
851 : lr003k 1120 for( my $i = 1; $i < $n; $i+=1)
852 :     {
853 :     $name = NEW_ANS_ARRAY_NAME_EXTENSION($num,0,$i);
854 :     $array[0][$i] = NAMED_ANS_ARRAY_EXTENSION($name,$col);
855 : apizer 1314
856 : lr003k 1120 }
857 : apizer 1314
858 : lr003k 1120 for( my $j = 1; $j < $m; $j+=1 ){
859 : apizer 1314
860 : lr003k 1120 for( my $i = 0; $i < $n; $i+=1)
861 :     {
862 :     $name = NEW_ANS_ARRAY_NAME_EXTENSION($num,$j,$i);
863 :     $array[$j][$i] = NAMED_ANS_ARRAY_EXTENSION($name,$col);
864 : apizer 1314
865 : lr003k 1120 }
866 : apizer 1314
867 : lr003k 1120 }
868 : gage 1251 my $ra_local_display_matrix=PG_restricted_eval(q!\&main::display_matrix!);
869 :     &$ra_local_display_matrix( \@array, @options );
870 : apizer 1314
871 : lr003k 1120 }
872 :    
873 :     sub ans_array_extension{
874 :     my $m = shift;
875 :     my $n = shift;
876 :     my $col = shift;
877 :     $col = 20 unless $col;
878 : gage 1267 my $num = PG_restricted_eval(q!$main::ans_rule_count!);
879 : lr003k 1120 my @options = @_;
880 :     my $name;
881 :     my @array=();
882 :     my $string;
883 :     my $answer_value = "";
884 : apizer 1314
885 : lr003k 1120 for( my $j = 0; $j < $m; $j+=1 ){
886 : apizer 1314
887 : lr003k 1120 for( my $i = 0; $i < $n; $i+=1)
888 :     {
889 :     $name = NEW_ANS_ARRAY_NAME_EXTENSION($num,$j,$i);
890 :     $array[$j][$i] = NAMED_ANS_ARRAY_EXTENSION($name,$col);
891 : apizer 1314
892 : lr003k 1120 }
893 : apizer 1314
894 : lr003k 1120 }
895 : gage 1251 my $ra_local_display_matrix=PG_restricted_eval(q!\&main::display_matrix!);
896 :     &$ra_local_display_matrix( \@array, @options );
897 : apizer 1314
898 : lr003k 1120 }
899 :    
900 :    
901 : sh002i 1050 # end answer blank macros
902 :    
903 :     =head2 Hints and solutions macros
904 :    
905 :     solution('text','text2',...);
906 :     SOLUTION('text','text2',...); # equivalent to TEXT(solution(...));
907 :    
908 :     hint('text', 'text2', ...);
909 :     HINT('text', 'text2',...); # equivalent to TEXT("$BR$HINT" . hint(@_) . "$BR") if hint(@_);
910 :    
911 :     Solution prints its concatenated input when the check box named 'ShowSol' is set and
912 :     the time is after the answer date. The check box 'ShowSol' is visible only after the
913 :     answer date or when the problem is viewed by a professor.
914 :    
915 : gage 1251 $main::envir{'displaySolutionsQ'} is set to 1 when a solution is to be displayed.
916 : sh002i 1050
917 :     Hints are shown only after the number of attempts is greater than $:showHint
918 :     ($main::showHint defaults to 1) and the check box named 'ShowHint' is set. The check box
919 :     'ShowHint' is visible only after the number of attempts is greater than $main::showHint.
920 :    
921 : gage 1251 $main::envir{'displayHintsQ'} is set to 1 when a hint is to be displayed.
922 : sh002i 1050
923 :    
924 :     =cut
925 :    
926 :    
927 :    
928 :     # solution prints its input when $displaySolutionsQ is set.
929 :     # use as TEXT(solution("blah, blah");
930 :     # \$solutionExists
931 :     # is passed to processProblem which displays a "show Solution" button
932 :     # when a solution is available for viewing
933 :    
934 :    
935 :     sub solution {
936 :     my @in = @_;
937 :     my $out = '';
938 : gage 1267 PG_restricted_eval(q!$main::solutionExists =1!);
939 :     if (PG_restricted_eval(q!$main::envir{'displaySolutionsQ'}!)) {$out = join(' ',@in);}
940 : sh002i 1050 $out;
941 :     }
942 :    
943 :    
944 :     sub SOLUTION {
945 :     TEXT( solution(@_)) ;
946 :     }
947 :    
948 :    
949 :    
950 :     sub hint {
951 :     my @in = @_;
952 :     my $out = '';
953 : apizer 1080
954 : gage 1267 PG_restricted_eval(q!$main::hintExists =1;
955 :     $main::numOfAttempts = 0 unless defined($main::numOfAttempts);
956 :     !);
957 : sh002i 1050
958 : gage 1267 if ($displayMode eq 'TeX') {
959 : sh002i 1050 $out = ''; # do nothing since hints are not available for download
960 : apizer 1314 } elsif (($envir->{'displayHintsQ'}) and
961 : gage 1267 PG_restricted_eval(q!($main::numOfAttempts >= $main::showHint)!))
962 : apizer 1080
963 : sh002i 1050 ## the second test above prevents a hint being shown if a doctored form is submitted
964 : apizer 1080
965 : sh002i 1050 {$out = join(' ',@in);} # show hint
966 : apizer 1080
967 : sh002i 1050 $out ;
968 :     }
969 :    
970 :    
971 :     sub HINT {
972 : gage 1267 TEXT("$BR" . hint(@_) . "$BR") if hint(@_);
973 : sh002i 1050 }
974 :    
975 :    
976 :    
977 :     # End hints and solutions macros
978 :     #################################
979 :    
980 : jj 3520 =head2 Comments to instructors
981 :    
982 :     COMMENT('text','text2',...);
983 :    
984 :     Takes the text to be lines of a comment to be shown only
985 :     in the Library Browser below the rendered problem.
986 :    
987 :     The function COMMENT stores the needed html in the variable
988 :     pgComment, which gets transfered to the flag 'comment' in PG_FLAGS.
989 :    
990 :     =cut
991 :    
992 :     # Add a comment which will display in the Library browser
993 :     # Currently, the only output is html
994 :    
995 :     sub COMMENT {
996 :     my @in = @_;
997 :     my $out = join("$BR", @in);
998 :     my $out = '<div class=\"AuthorComment\">'.$out.'</div>';
999 :    
1000 :     PG_restricted_eval(q!$main::pgComment = "!.$out.q!"!);
1001 :     return('');
1002 :     }
1003 :    
1004 :     #################################
1005 : sh002i 1050 # Produces a random number between $begin and $end with increment 1.
1006 :     # You do not have to worry about integer or floating point types.
1007 :    
1008 :     =head2 Pseudo-random number generator
1009 :    
1010 :     Usage:
1011 :     random(0,5,.1) # produces a random number between 0 and 5 in increments of .1
1012 :     non_zero_random(0,5,.1) # gives a non-zero random number
1013 :    
1014 :     list_random(2,3,5,6,7,8,10) # produces random value from the list
1015 :     list_random(2,3, (5..8),10) # does the same thing
1016 :    
1017 :     SRAND(seed) # resets the main random generator -- use very cautiously
1018 :    
1019 :    
1020 :     SRAND(time) will create a different problem everytime it is called. This makes it difficult
1021 :     to check the answers :-).
1022 :    
1023 : gage 1251 SRAND($envir->{'inputs_ref'}->{'key'} ) will create a different problem for each login session.
1024 : sh002i 1050 This is probably what is desired.
1025 :    
1026 :     =cut
1027 :    
1028 :    
1029 :     sub random {
1030 :     my ($begin, $end, $incr) = @_;
1031 : gage 1267 $PG_random_generator->random($begin,$end,$incr);
1032 : sh002i 1050 }
1033 :    
1034 :    
1035 :     sub non_zero_random { ##gives a non-zero random number
1036 :     my (@arguments)=@_;
1037 :     my $a=0;
1038 :     my $i=100; #safety counter
1039 :     while ($a==0 && ( 0 < $i-- ) ) {
1040 :     $a=random(@arguments);
1041 :     }
1042 :     $a;
1043 :     }
1044 :    
1045 :     sub list_random {
1046 :     my(@li) = @_;
1047 :     return $li[random(1,scalar(@li))-1];
1048 :     }
1049 :    
1050 :     sub SRAND { # resets the main random generator -- use cautiously
1051 :     my $seed = shift;
1052 : gage 1328 $PG_random_generator -> srand($seed);
1053 : sh002i 1050 }
1054 :    
1055 :     # display macros
1056 :    
1057 :     =head2 Display Macros
1058 :    
1059 :     These macros produce different output depending on the display mode being used to show
1060 :     the problem on the screen, or whether the problem is being converted to TeX to produce
1061 :     a hard copy output.
1062 :    
1063 :     MODES ( TeX => "Output this in TeX mode",
1064 :     HTML => "output this in HTML mode",
1065 :     HTML_tth => "output this in HTML_tth mode",
1066 :     HTML_dpng => "output this in HTML_dpng mode",
1067 :     Latex2HTML => "output this in Latex2HTML mode",
1068 :     )
1069 :    
1070 :     TEX (tex_version, html_version) #obsolete
1071 :    
1072 :     M3 (tex_version, latex2html_version, html_version) #obsolete
1073 :    
1074 :    
1075 :    
1076 :     =cut
1077 :    
1078 :    
1079 :     sub TEX {
1080 :     my ($tex, $html ) = @_;
1081 :     MODES(TeX => $tex, HTML => $html, HTML_tth => $html, HTML_dpng => $html);
1082 :     }
1083 :    
1084 :    
1085 :     sub M3 {
1086 :     my($tex,$l2h,$html) = @_;
1087 :     MODES(TeX => $tex, Latex2HTML => $l2h, HTML => $html, HTML_tth => $html, HTML_dpng => $html);
1088 :     }
1089 :    
1090 : sh002i 2370 # MODES() is now table driven
1091 :     our %DISPLAY_MODE_FAILOVER = (
1092 :     TeX => [],
1093 :     HTML => [],
1094 :     HTML_tth => [ "HTML", ],
1095 :     HTML_dpng => [ "HTML_tth", "HTML", ],
1096 :     HTML_jsMath => [ "HTML_dpng", "HTML_tth", "HTML", ],
1097 :     HTML_asciimath => [ "HTML_dpng", "HTML_tth", "HTML", ],
1098 :     # legacy modes -- these are not supported, but some problems might try to
1099 :     # set the display mode to one of these values manually and some macros may
1100 :     # provide rendered versions for these modes but not the one we want.
1101 :     Latex2HTML => [ "TeX", "HTML", ],
1102 :     HTML_img => [ "HTML_dpng", "HTML_tth", "HTML", ],
1103 :     );
1104 : sh002i 1050
1105 : sh002i 2370 # This replaces M3. You can add new modes at will to this one.
1106 : sh002i 1050 sub MODES {
1107 :     my %options = @_;
1108 : sh002i 2370
1109 :     # is a string supplied for the current display mode? if so, return it
1110 : sh002i 2193 return $options{$displayMode} if defined $options{$displayMode};
1111 :    
1112 : sh002i 2370 # otherwise, fail over to backup modes
1113 :     my @backup_modes;
1114 :     if (exists $DISPLAY_MODE_FAILOVER{$displayMode}) {
1115 :     @backup_modes = @{$DISPLAY_MODE_FAILOVER{$displayMode}};
1116 : sh002i 2193 foreach my $mode (@backup_modes) {
1117 :     return $options{$mode} if defined $options{$mode};
1118 :     }
1119 :     }
1120 : sh002i 2370 die "ERROR in defining MODES: neither display mode $displayMode nor",
1121 :     " any fallback modes (", join(", ", @backup_modes), ") supplied.\n";
1122 : sh002i 1050 }
1123 :    
1124 :     # end display macros
1125 :    
1126 :    
1127 :     =head2 Display constants
1128 :    
1129 :     @ALPHABET ALPHABET() capital letter alphabet -- ALPHABET[0] = 'A'
1130 :     $PAR PAR() paragraph character (\par or <p>)
1131 :     $BR BR() line break character
1132 :     $LQ LQ() left double quote
1133 :     $RQ RQ() right double quote
1134 :     $BM BM() begin math
1135 :     $EM EM() end math
1136 :     $BDM BDM() begin display math
1137 :     $EDM EDM() end display math
1138 :     $LTS LTS() strictly less than
1139 :     $GTS GTS() strictly greater than
1140 :     $LTE LTE() less than or equal
1141 :     $GTE GTE() greater than or equal
1142 :     $BEGIN_ONE_COLUMN BEGIN_ONE_COLUMN() begin one-column mode
1143 :     $END_ONE_COLUMN END_ONE_COLUMN() end one-column mode
1144 :     $SOL SOLUTION_HEADING() solution headline
1145 :     $SOLUTION SOLUTION_HEADING() solution headline
1146 :     $HINT HINT_HEADING() hint headline
1147 :     $US US() underscore character
1148 :     $SPACE SPACE() space character (tex and latex only)
1149 :     $BBOLD BBOLD() begin bold typeface
1150 :     $EBOLD EBOLD() end bold typeface
1151 :     $BITALIC BITALIC() begin italic typeface
1152 :     $EITALIC EITALIC() end italic typeface
1153 :     $BCENTER BCENTER() begin centered environment
1154 : apizer 1080 $ECENTER ECENTER() end centered environment
1155 : sh002i 1050 $HR HR() horizontal rule
1156 :     $LBRACE LBRACE() left brace
1157 :     $LB LB () left brace
1158 :     $RBRACE RBRACE() right brace
1159 :     $RB RB () right brace
1160 :     $DOLLAR DOLLAR() a dollar sign
1161 :     $PERCENT PERCENT() a percent sign
1162 :     $CARET CARET() a caret sign
1163 :     $PI PI() the number pi
1164 :     $E E() the number e
1165 :    
1166 :     =cut
1167 :    
1168 :    
1169 :    
1170 :    
1171 :    
1172 :     # A utility variable. Notice that "B"=$ALPHABET[1] and
1173 :     # "ABCD"=@ALPHABET[0..3].
1174 :    
1175 :     sub ALPHABET {
1176 :     ('A'..'ZZ')[@_];
1177 :     }
1178 :    
1179 :     ###############################################################
1180 :     # Some constants which are different in tex and in HTML
1181 :     # The order of arguments is TeX, Latex2HTML, HTML
1182 : apizer 1390 # Adopted Davide Cervone's improvements to PAR, LTS, GTS, LTE, GTE, LBRACE, RBRACE, LB, RB. 7-14-03 AKP
1183 : apizer 1379 sub PAR { MODES( TeX => '\\par ', Latex2HTML => '\\begin{rawhtml}<P>\\end{rawhtml}', HTML => '<P>'); };
1184 : apizer 1390 sub BR { MODES( TeX => '\\par\\noindent ', Latex2HTML => '\\begin{rawhtml}<BR>\\end{rawhtml}', HTML => '<BR>'); };
1185 :     # Alternate definition of BR which is slightly more flexible and gives more white space in printed output
1186 :     # which looks better but kills more trees.
1187 : dpvc 3268 #sub BR { MODES( TeX => '\\leavevmode\\\\', Latex2HTML => '\\begin{rawhtml}<BR>\\end{rawhtml}', HTML => '<BR>'); };
1188 : sh002i 1050 sub LQ { MODES( TeX => "``", Latex2HTML => '"', HTML => '&quot;' ); };
1189 :     sub RQ { MODES( TeX => "''", Latex2HTML => '"', HTML => '&quot;' ); };
1190 :     sub BM { MODES(TeX => '\\(', Latex2HTML => '\\(', HTML => ''); }; # begin math mode
1191 :     sub EM { MODES(TeX => '\\)', Latex2HTML => '\\)', HTML => ''); }; # end math mode
1192 :     sub BDM { MODES(TeX => '\\[', Latex2HTML => '\\[', HTML => '<P ALIGN=CENTER>'); }; #begin displayMath mode
1193 :     sub EDM { MODES(TeX => '\\]', Latex2HTML => '\\]', HTML => '</P>'); }; #end displayMath mode
1194 : apizer 1379 sub LTS { MODES(TeX => '<', Latex2HTML => '\\lt ', HTML => '&lt;', HTML_tth => '<' ); };
1195 :     sub GTS { MODES(TeX => '>', Latex2HTML => '\\gt ', HTML => '&gt;', HTML_tth => '>' ); };
1196 :     sub LTE { MODES(TeX => '\\le ', Latex2HTML => '\\le ', HTML => '<U>&lt;</U>', HTML_tth => '\\le ' ); };
1197 :     sub GTE { MODES(TeX => '\\ge ', Latex2HTML => '\\ge ', HTML => '<U>&gt;</U>', HTML_tth => '\\ge ' ); };
1198 : sh002i 1050 sub BEGIN_ONE_COLUMN { MODES(TeX => " \\end{multicols}\n", Latex2HTML => " ", HTML => " "); };
1199 :     sub END_ONE_COLUMN { MODES(TeX =>
1200 :     " \\begin{multicols}{2}\n\\columnwidth=\\linewidth\n",
1201 :     Latex2HTML => ' ', HTML => ' ');
1202 :    
1203 :     };
1204 :     sub SOLUTION_HEADING { MODES( TeX => '\\par {\\bf Solution:}',
1205 :     Latex2HTML => '\\par {\\bf Solution:}',
1206 :     HTML => '<P><B>Solution:</B>');
1207 :     };
1208 :     sub HINT_HEADING { MODES( TeX => "\\par {\\bf Hint:}", Latex2HTML => "\\par {\\bf Hint:}", HTML => "<P><B>Hint:</B>"); };
1209 :     sub US { MODES(TeX => '\\_', Latex2HTML => '\\_', HTML => '_');}; # underscore, e.g. file${US}name
1210 :     sub SPACE { MODES(TeX => '\\ ', Latex2HTML => '\\ ', HTML => '&nbsp;');}; # force a space in latex, doesn't force extra space in html
1211 :     sub BBOLD { MODES(TeX => '{\\bf ', Latex2HTML => '{\\bf ', HTML => '<B>'); };
1212 :     sub EBOLD { MODES( TeX => '}', Latex2HTML => '}',HTML => '</B>'); };
1213 :     sub BITALIC { MODES(TeX => '{\\it ', Latex2HTML => '{\\it ', HTML => '<I>'); };
1214 :     sub EITALIC { MODES(TeX => '} ', Latex2HTML => '} ', HTML => '</I>'); };
1215 :     sub BCENTER { MODES(TeX => '\\begin{center} ', Latex2HTML => ' \\begin{rawhtml} <div align="center"> \\end{rawhtml} ', HTML => '<div align="center">'); };
1216 :     sub ECENTER { MODES(TeX => '\\end{center} ', Latex2HTML => ' \\begin{rawhtml} </div> \\end{rawhtml} ', HTML => '</div>'); };
1217 :     sub HR { MODES(TeX => '\\par\\hrulefill\\par ', Latex2HTML => '\\begin{rawhtml} <HR> \\end{rawhtml}', HTML => '<HR>'); };
1218 : apizer 1379 sub LBRACE { MODES( TeX => '\{', Latex2HTML => '\\lbrace', HTML => '{' , HTML_tth=> '\\lbrace' ); };
1219 :     sub RBRACE { MODES( TeX => '\}', Latex2HTML => '\\rbrace', HTML => '}' , HTML_tth=> '\\rbrace',); };
1220 :     sub LB { MODES( TeX => '\{', Latex2HTML => '\\lbrace', HTML => '{' , HTML_tth=> '\\lbrace' ); };
1221 :     sub RB { MODES( TeX => '\}', Latex2HTML => '\\rbrace', HTML => '}' , HTML_tth=> '\\rbrace',); };
1222 : sh002i 1050 sub DOLLAR { MODES( TeX => '\\$', Latex2HTML => '\\$', HTML => '$' ); };
1223 :     sub PERCENT { MODES( TeX => '\\%', Latex2HTML => '\\%', HTML => '%' ); };
1224 :     sub CARET { MODES( TeX => '\\verb+^+', Latex2HTML => '\\verb+^+', HTML => '^' ); };
1225 :     sub PI {4*atan2(1,1);};
1226 :     sub E {exp(1);};
1227 :    
1228 :     ###############################################################
1229 :     ## Evaluation macros
1230 :    
1231 :    
1232 :     =head2 TEXT macros
1233 :    
1234 :     Usage:
1235 :     TEXT(@text);
1236 :    
1237 :     This is the simplest way to print text from a problem. The strings in the array C<@text> are concatenated
1238 :     with spaces between them and printed out in the text of the problem. The text is not processed in any other way.
1239 :     C<TEXT> is defined in PG.pl.
1240 :    
1241 :     Usage:
1242 :     BEGIN_TEXT
1243 :     text.....
1244 :     END_TEXT
1245 :    
1246 :     This is the most common way to enter text into the problem. All of the text between BEGIN_TEXT and END_TEXT
1247 :     is processed by the C<EV3> macro described below and then printed using the C<TEXT> command. The two key words
1248 :     must appear on lines by themselves. The preprocessing that makes this construction work is done in F<PGtranslator.pm>.
1249 :     See C<EV3> below for details on the processing.
1250 :    
1251 :    
1252 :     =cut
1253 :    
1254 :     =head2 Evaluation macros
1255 :    
1256 :     =head3 EV3
1257 :    
1258 :     TEXT(EV3("This is a formulat \( \int_0^5 x^2 \, dx \) ");
1259 :     TEXT(EV3(@text));
1260 :    
1261 :     TEXT(EV3(<<'END_TEXT'));
1262 :     text stuff...
1263 :     END_TEXT
1264 :    
1265 :    
1266 :     The BEGIN_TEXT/END_TEXT construction is translated into the construction above by PGtranslator.pm. END_TEXT must appear
1267 :     on a line by itself and be left justified. (The << construction is known as a "here document" in UNIX and in PERL.)
1268 :    
1269 :     The single quotes around END_TEXT mean that no automatic interpolation of variables takes place in the text.
1270 :     Using EV3 with strings which have been evaluated by double quotes may lead to unexpected results.
1271 :    
1272 :    
1273 :     The evaluation macro E3 first evaluates perl code inside the braces: C<\{ code \}>.
1274 :     Any perl statment can be put inside the braces. The
1275 :     result of the evaluation (i.e. the last statement evaluated) replaces the C<\{ code \}> construction.
1276 :    
1277 :     Next interpolation of all variables (e.g. C<$var or @array> ) is performed.
1278 :    
1279 :     Then mathematical formulas in TeX are evaluated within the
1280 :     C<\( tex math mode \)> and
1281 :     C<\[ tex display math mode \] >
1282 :     constructions, in that order:
1283 :    
1284 :     =head3 FEQ
1285 :    
1286 :     FEQ($string); # processes and outputs the string
1287 :    
1288 :    
1289 :     The mathematical formulas are run through the macro C<FEQ> (Format EQuations) which performs
1290 :     several substitutions (see below).
1291 :     In C<HTML_tth> mode the resulting code is processed by tth to obtain an HTML version
1292 :     of the formula. (In the future processing by WebEQ may be added here as another option.)
1293 :     The Latex2HTML mode does nothing
1294 :     at this stage; it creates the entire problem before running it through
1295 :     TeX and creating the GIF images of the equations.
1296 :    
1297 :     The resulting string is output (and usually fed into TEXT to be printed in the problem).
1298 :    
1299 :     Usage:
1300 :    
1301 :     $string2 = FEQ($string1);
1302 :    
1303 :     This is a filter which is used to format equations by C<EV2> and C<EV3>, but can also be used on its own. It is best
1304 :     understood with an example.
1305 :    
1306 :     $string1 = "${a}x^2 + ${b}x + {$c:%.1f}"; $a = 3;, $b = -2; $c = -7.345;
1307 :    
1308 :     when interpolated becomes:
1309 :    
1310 :     $string1 = '3x^2 + -2x + {-7.345:%0.1f}
1311 :    
1312 :     FEQ first changes the number of decimal places displayed, so that the last term becomes -7.3 Then it removes the
1313 :     extraneous plus and minus signs, so that the final result is what you want:
1314 :    
1315 :     $string2 = '3x^2 - 2x -7.3';
1316 :    
1317 :     (The %0.1f construction
1318 :     is the same formatting convention used by Perl and nearly identical to the one used by the C printf statement. Some common
1319 :     usage: %0.3f 3 decimal places, fixed notation; %0.3e 3 significant figures exponential notation; %0.3g uses either fixed
1320 :     or exponential notation depending on the size of the number.)
1321 :    
1322 :     Two additional legacy formatting constructions are also supported:
1323 :    
1324 :     C<?{$c:%0.3f} > will give a number with 3 decimal places and a negative
1325 :     sign if the number is negative, no sign if the number is positive.
1326 :    
1327 :     C<!{$c:%0.3f}> determines the sign and prints it
1328 :     whether the number is positive or negative.
1329 :    
1330 :     =head3 EV2
1331 :    
1332 :     TEXT(EV2(@text));
1333 :    
1334 :     TEXT(EV2(<<END_OF_TEXT));
1335 :     text stuff...
1336 :     END_OF_TEXT
1337 :    
1338 :     This is a precursor to EV3. In this case the constants are interpolated first, before the evaluation of the \{ ...code...\}
1339 :     construct. This can lead to unexpected results. For example C<\{ join(" ", @text) \}> with C<@text = ("Hello","World");> becomes,
1340 :     after interpolation, C<\{ join(" ",Hello World) \}> which then causes an error when evaluated because Hello is a bare word.
1341 :     C<EV2> can still be useful if you allow for this, and in particular it works on double quoted strings, which lead to
1342 :     unexpected results with C<EV3>. Using single quoted strings with C<EV2> may lead to unexpected results.
1343 :    
1344 :     The unexpected results have to do with the number of times backslashed constructions have to be escaped. It is quite messy. For
1345 :     more details get a good Perl book and then read the code. :-)
1346 :    
1347 :    
1348 :    
1349 :    
1350 :     =cut
1351 :    
1352 :    
1353 :     sub ev_substring {
1354 :     my $string = shift;
1355 :     my $start_delim = shift;
1356 :     my $end_delim = shift;
1357 :     my $actionRef = shift;
1358 :     my ($eval_out,$PG_eval_errors,$PG_full_error_report)=();
1359 :     my $out = "";
1360 : apizer 1379 #
1361 :     # DPVC -- 2001/12/07
1362 :     # original "while ($string)" fails to process the string "0" correctly
1363 :     #
1364 :     while ($string ne "") {
1365 :     #
1366 :     # end DPVC
1367 :     #
1368 : sh002i 1050 if ($string =~ /\Q$start_delim\E/s) {
1369 :     #print "$start_delim $end_delim evaluating_substring=$string<BR>";
1370 :     $string =~ s/^(.*?)\Q$start_delim\E//s; # get string up to next \{ ---treats string as a single line, ignoring returns
1371 :     $out .= $1;
1372 :     #print "$start_delim $end_delim substring_out=$out<BR>";
1373 :     $string =~ s/^(.*?)\Q$end_delim\E//s; # get perl code up to \} ---treats string as a single line, ignoring returns
1374 :     #print "$start_delim $end_delim evaluate_string=$1<BR>";
1375 :     ($eval_out,$PG_eval_errors,$PG_full_error_report) = &$actionRef($1);
1376 :     $eval_out = "$start_delim $eval_out $end_delim" if $PG_full_error_report;
1377 :     $out = $out . $eval_out;
1378 :     #print "$start_delim $end_delim new substring_out=$out<BR><p><BR>";
1379 : gage 1267 $out .="$PAR ERROR $0 in ev_substring, PGbasicmacros.pl:$PAR <PRE> $@ </PRE>$PAR" if $@;
1380 : sh002i 1050 }
1381 :     else {
1382 :     $out .= $string; # flush the last part of the string
1383 :     last;
1384 :     }
1385 :    
1386 :     }
1387 :     $out;
1388 :     }
1389 :     sub safe_ev {
1390 :     my ($out,$PG_eval_errors,$PG_full_error_report) = &old_safe_ev; # process input by old_safe_ev first
1391 :     $out =~s/\\/\\\\/g; # protect any new backslashes introduced.
1392 :     ($out,$PG_eval_errors,$PG_full_error_report)
1393 :     }
1394 :    
1395 :     sub old_safe_ev {
1396 :     my $in = shift;
1397 :     my ($out,$PG_eval_errors,$PG_full_error_report) = PG_restricted_eval("$in;");
1398 :     # the addition of the ; seems to provide better error reporting
1399 :     if ($PG_eval_errors) {
1400 :     my @errorLines = split("\n",$PG_eval_errors);
1401 : gage 1267 #$out = "<PRE>$PAR % ERROR in $0:old_safe_ev, PGbasicmacros.pl: $PAR % There is an error occuring inside evaluation brackets \\{ ...code... \\} $BR % somewhere in an EV2 or EV3 or BEGIN_TEXT block. $BR % Code evaluated:$BR $in $BR % $BR % $errorLines[0]\n % $errorLines[1]$BR % $BR % $BR </PRE> ";
1402 : sh002i 1050 warn " ERROR in old_safe_ev, PGbasicmacros.pl: <PRE>
1403 :     ## There is an error occuring inside evaluation brackets \\{ ...code... \\}
1404 :     ## somewhere in an EV2 or EV3 or BEGIN_TEXT block.
1405 :     ## Code evaluated:
1406 :     ## $in
1407 :     ##" .join("\n ", @errorLines). "
1408 : gage 1267 ##</PRE>$BR
1409 : sh002i 1050 ";
1410 : gage 1267 $out ="$PAR $BBOLD $in $EBOLD $PAR";
1411 : sh002i 1050
1412 :    
1413 :     }
1414 :    
1415 :     ($out,$PG_eval_errors,$PG_full_error_report);
1416 :     }
1417 :    
1418 :     sub FEQ { # Format EQuations
1419 :     my $in = shift;
1420 :     # formatting numbers -- the ?{} and !{} constructions
1421 :     $in =~s/\?\s*\{([.\-\$\w\d]+):?([%.\da-z]*)\}/${ \( &sspf($1,$2) )}/g;
1422 :     $in =~s/\!\s*\{([.\-\$\w\d]+):?([%.\da-z]*)\}/${ \( &spf($1,$2) )}/g;
1423 :    
1424 :     # more formatting numbers -- {number:format} constructions
1425 :     $in =~ s/\{(\s*[\+\-\d\.]+[eE]*[\+\-]*\d*):(\%\d*.\d*\w)}/${ \( &spf($1,$2) )}/g;
1426 :     $in =~ s/\+\s*\-/ - /g;
1427 :     $in =~ s/\-\s*\+/ - /g;
1428 :     $in =~ s/\+\s*\+/ + /g;
1429 :     $in =~ s/\-\s*\-/ + /g;
1430 :     $in;
1431 :     }
1432 :    
1433 :     #sub math_ev3 {
1434 :     # my $in = shift; #print "in=$in<BR>";
1435 :     # my ($out,$PG_eval_errors,$PG_full_error_report);
1436 :     # $in = FEQ($in);
1437 :     # $in =~ s/%/\\%/g; # % causes trouble in TeX and HTML_tth it usually (always?) indicates an error, not comment
1438 : gage 1267 # return("$BM $in $EM") unless ($displayMode eq 'HTML_tth');
1439 : sh002i 1050 # $in = "\\(" . $in . "\\)";
1440 :     # $out = tth($in);
1441 :     # ($out,$PG_eval_errors,$PG_full_error_report);
1442 :     #
1443 :     #}
1444 :     #
1445 :     #sub display_math_ev3 {
1446 :     # my $in = shift; #print "in=$in<BR>";
1447 :     # my ($out,$PG_eval_errors,$PG_full_error_report);
1448 :     # $in = FEQ($in);
1449 :     # $in =~ s/%/\\%/g;
1450 :     # return("$main::BDM $in $main::EDM") unless $displayMode eq 'HTML_tth' ;
1451 :     # $in = "\\[" . $in . "\\]";
1452 :     # $out =tth($in);
1453 :     # ($out,$PG_eval_errors,$PG_full_error_report);
1454 :     #}
1455 :    
1456 :     sub math_ev3 {
1457 :     my $in = shift;
1458 :     return general_math_ev3($in, "inline");
1459 :     }
1460 :    
1461 :     sub display_math_ev3 {
1462 :     my $in = shift;
1463 :     return general_math_ev3($in, "display");
1464 :     }
1465 :    
1466 :     sub general_math_ev3 {
1467 :     my $in = shift;
1468 :     my $mode = shift || "inline";
1469 : apizer 1080
1470 : sh002i 1155 $in = FEQ($in); # Format EQuations
1471 :     $in =~ s/%/\\%/g; # avoid % becoming TeX comments
1472 : apizer 1314
1473 : apizer 1379 ## remove leading and trailing spaces so that HTML mode will
1474 :     ## not include unwanted spaces as per Davide Cervone.
1475 :     $in =~ s/^\s+//;
1476 :     $in =~ s/\s+$//;
1477 : jj 1758 ## If it ends with a backslash, there should be another space
1478 :     ## at the end
1479 :     if($in =~ /\\$/) { $in .= ' ';}
1480 : apizer 1379
1481 : sh002i 1155 # some modes want the delimiters, some don't
1482 :     my $in_delim = $mode eq "inline"
1483 :     ? "\\($in\\)"
1484 :     : "\\[$in\\]";
1485 : apizer 1314
1486 : sh002i 1050 my $out;
1487 : gage 1071 if($displayMode eq "HTML_tth") {
1488 :     $out = tth($in_delim);
1489 : apizer 1379 ## remove leading and trailing spaces as per Davide Cervone.
1490 : dpvc 2392 $out =~ s/^\s+//;
1491 :     $out =~ s/\s+$//;
1492 : gage 1071 } elsif ($displayMode eq "HTML_dpng") {
1493 : sh002i 1158 # for jj's version of ImageGenerator
1494 : gage 1251 $out = $envir->{'imagegen'}->add($in_delim);
1495 : sh002i 1158 # for my version of ImageGenerator
1496 : gage 1251 #$out = $envir->{'imagegen'}->add($in, $mode);
1497 : sh002i 1050 } elsif ($displayMode eq "HTML_img") {
1498 :     $out = math2img($in, $mode);
1499 : dpvc 2166 } elsif ($displayMode eq "HTML_jsMath") {
1500 : dpvc 2292 $in =~ s/</&lt;/g; $in =~ s/>/&gt;/g;
1501 : dpvc 2166 $out = '<SPAN CLASS="math">'.$in.'</SPAN>' if $mode eq "inline";
1502 :     $out = '<DIV CLASS="math">'.$in.'</DIV>' if $mode eq "display";
1503 : dpvc 2199 } elsif ($displayMode eq "HTML_asciimath") {
1504 :     $out = "`$in`" if $mode eq "inline";
1505 :     $out = '<DIV ALIGN="CENTER">`'.$in.'`</DIV>' if $mode eq "display";
1506 : sh002i 1050 } else {
1507 :     $out = "\\($in\\)" if $mode eq "inline";
1508 :     $out = "\\[$in\\]" if $mode eq "display";
1509 :     }
1510 :     return $out;
1511 :     }
1512 :    
1513 :     sub EV2 {
1514 :     my $string = join(" ",@_);
1515 :     # evaluate code inside of \{ \} (no nesting allowed)
1516 :     $string = ev_substring($string,"\\{","\\}",\&old_safe_ev);
1517 :     $string = ev_substring($string,"\\<","\\>",\&old_safe_ev);
1518 :     $string = ev_substring($string,"\\(","\\)",\&math_ev3);
1519 :     $string = ev_substring($string,"\\[","\\]",\&display_math_ev3);
1520 :     # macros for displaying math
1521 : gage 1267 $string =~ s/\\\(/$BM/g;
1522 :     $string =~ s/\\\)/$EM/g;
1523 :     $string =~ s/\\\[/$BDM/g;
1524 :     $string =~ s/\\\]/$EDM/g;
1525 : sh002i 1050 $string;
1526 :     }
1527 :    
1528 :     sub EV3{
1529 :     my $string = join(" ",@_);
1530 :     # evaluate code inside of \{ \} (no nesting allowed)
1531 :     $string = ev_substring($string,"\\\\{","\\\\}",\&safe_ev); # handles \{ \} in single quoted strings of PG files
1532 :     # interpolate variables
1533 :     my ($evaluated_string,$PG_eval_errors,$PG_full_errors) = PG_restricted_eval("<<END_OF_EVALUATION_STRING\n$string\nEND_OF_EVALUATION_STRING\n");
1534 :     if ($PG_eval_errors) {
1535 :     my @errorLines = split("\n",$PG_eval_errors);
1536 :     $string =~ s/</&lt;/g; $string =~ s/>/&gt;/g;
1537 : gage 1267 $evaluated_string = "<PRE>$PAR % ERROR in $0:EV3, PGbasicmacros.pl: $PAR % There is an error occuring in the following code:$BR $string $BR % $BR % $errorLines[0]\n % $errorLines[1]$BR % $BR % $BR </PRE> ";
1538 : sh002i 1050 $@="";
1539 :     }
1540 :     $string = $evaluated_string;
1541 :     $string = ev_substring($string,"\\(","\\)",\&math_ev3);
1542 :     $string = ev_substring($string,"\\[","\\]",\&display_math_ev3);
1543 :     $string;
1544 :     }
1545 :    
1546 : gage 1483 sub EV4{
1547 :     if ($displayMode eq "HTML_dpng") {
1548 :     my $string = join(" ",@_);
1549 :     my ($evaluated_string,$PG_eval_errors,$PG_full_errors) = PG_restricted_eval("<<END_OF_EVALUATION_STRING\n$string\nEND_OF_EVALUATION_STRING\n");
1550 :     if ($PG_eval_errors) {
1551 :     my @errorLines = split("\n",$PG_eval_errors);
1552 :     $string =~ s/</&lt;/g; $string =~ s/>/&gt;/g;
1553 :     $evaluated_string = "<PRE>$PAR % ERROR in $0:EV3, PGbasicmacros.pl:".
1554 :     "$PAR % There is an error occuring in the following code:$BR ".
1555 : gage 1490 "$string $BR % $BR % $errorLines[0]\n % $errorLines[1]$BR ".
1556 : gage 1483 "% $BR % $BR </PRE> ";
1557 :     }
1558 :     $string = $evaluated_string;
1559 :     $string = $envir{'imagegen'}->add($string);
1560 :     $string;
1561 :     } else {
1562 :     EV3(@_);
1563 :     }
1564 :     }
1565 :    
1566 :    
1567 : sh002i 1050 =head2 Formatting macros
1568 :    
1569 :     beginproblem() # generates text listing number and the point value of
1570 :     # the problem. It will also print the file name containing
1571 :     # the problem for users listed in the PRINT_FILE_NAMES_FOR PG_environment
1572 :     # variable.
1573 :     OL(@array) # formats the array as an Ordered List ( <OL> </OL> ) enumerated by letters.
1574 :    
1575 :     htmlLink($url, $text)
1576 :     # Places a reference to the URL with the specified text in the problem.
1577 :     # A common usage is \{ htmlLink(alias('prob1_help.html') \}, 'for help')
1578 :     # where alias finds the full address of the prob1_help.html file in the same directory
1579 :     # as the problem file
1580 :     appletLink($url, $parameters)
1581 :     # For example
1582 :     # appletLink(q! archive="http: //webwork.math.rochester.edu/gage/xFunctions/xFunctions.zip"
1583 :     code="xFunctionsLauncher.class" width=100 height=14!,
1584 :     " parameter text goes here")
1585 :     # will link to xFunctions.
1586 :    
1587 :     low level:
1588 :    
1589 :     spf($number, $format) # prints the number with the given format
1590 :     sspf($number, $format) # prints the number with the given format, always including a sign.
1591 : jj 2155 nicestring($coefficients, $terms) # print a linear combinations of terms using coefficients
1592 :     nicestring($coefficients) # uses the coefficients to make a polynomial
1593 :     # For example
1594 :     # nicestring([1,-2, 0]) produces 'x^2-2x'
1595 :     # nicestring([2,0,-1],['', 't', 't^2']) produces '2-t^2'
1596 : sh002i 1050 protect_underbar($string) # protects the underbar (class_name) in strings which may have to pass through TeX.
1597 :    
1598 :     =cut
1599 :    
1600 :     sub beginproblem {
1601 :     my $out = "";
1602 : gage 1267 my $problemValue = $envir->{problemValue};
1603 : gage 1298 my $fileName = $envir->{fileName};
1604 : gage 1267 my $probNum = $envir->{probNum};
1605 :     my $TeXFileName = protect_underbar($envir->{fileName});
1606 :     my $l2hFileName = protect_underbar($envir->{fileName});
1607 : sh002i 1050 my %inlist;
1608 :     my $points ='pts';
1609 : apizer 1314
1610 : gage 1267 $points = 'pt' if $problemValue == 1;
1611 : sh002i 1050 ## Prepare header for the problem
1612 : gage 1251 grep($inlist{$_}++,@{ $envir->{'PRINT_FILE_NAMES_FOR'} });
1613 : gage 1267 if ( defined($inlist{$envir->{studentLogin}}) and ($inlist{$envir->{studentLogin}} > 0) ) {
1614 : dpvc 2392 $out = &M3("{\\bf ${probNum}. {\\footnotesize ($problemValue $points) $TeXFileName}}\\newline ",
1615 : gage 1267 " \\begin{rawhtml} ($problemValue $points) <B>$l2hFileName</B><BR>\\end{rawhtml}",
1616 :     "($problemValue $points) <B>$fileName</B><BR>"
1617 : jj 1964 ) if ($problemValue ne "");
1618 : dpvc 2392 } else {
1619 :     $out = &M3("{\\bf ${probNum}.} ($problemValue $points) ",
1620 : gage 1267 "($problemValue $points) ",
1621 :     "($problemValue $points) "
1622 : jj 1964 ) if ($problemValue ne "");
1623 : sh002i 1050 }
1624 :     $out;
1625 :    
1626 :     }
1627 :    
1628 : jj 2155 sub nicestring {
1629 :     my($thingy) = shift;
1630 :     my(@coefs) = @{$thingy};
1631 :     my $n = scalar(@coefs);
1632 :     $thingy = shift;
1633 :     my(@others);
1634 :     if(defined($thingy)) {
1635 :     @others = @{$thingy};
1636 :     } else {
1637 :     my($j);
1638 :     for $j (1..($n-2)) {
1639 :     $others[$j-1] = "x^".($n-$j);
1640 :     }
1641 :     if($n>=2) { $others[$n-2] = "x";}
1642 :     $others[$n-1] = "";
1643 :     }
1644 :     my($j, $k)=(0,0);
1645 :     while(($k<$n) && ($coefs[$k]==0)) {$k++;}
1646 :     if($k==$n) {return("0");}
1647 :     my $ans;
1648 :     if($coefs[$k]==1) {$ans = ($others[$k]) ? "$others[$k]" : "1";}
1649 :     elsif($coefs[$k]== -1) {$ans = ($others[$k]) ? "- $others[$k]" : "-1"}
1650 :     else { $ans = "$coefs[$k] $others[$k]";}
1651 :     $k++;
1652 :     for $j ($k..($n-1)) {
1653 :     if($coefs[$j] != 0) {
1654 :     if($coefs[$j] == 1) {
1655 :     $ans .= ($others[$j]) ? "+ $others[$j]" : "+ 1";
1656 :     } elsif($coefs[$j] == -1) {
1657 :     $ans .= ($others[$j]) ? "- $others[$j]" : "-1";
1658 :     } else {
1659 :     $ans .= "+ $coefs[$j] $others[$j]";
1660 :     }
1661 :     }
1662 :     }
1663 :     return($ans);
1664 :     }
1665 :    
1666 : sh002i 1050 # kludge to clean up path names
1667 :     ## allow underscore character in set and section names and also allows line breaks at /
1668 :     sub protect_underbar {
1669 :     my $in = shift;
1670 :     if ($displayMode eq 'TeX') {
1671 :    
1672 :     $in =~ s|_|\\\_|g;
1673 :     $in =~ s|/|\\\-/|g; # allows an optional hyphenation of the path (in tex)
1674 :     }
1675 :     $in;
1676 :     }
1677 :    
1678 :    
1679 :     # An example of a macro which prints out a list (with letters)
1680 :     sub OL {
1681 :     my(@array) = @_;
1682 :     my $i = 0;
1683 : apizer 3158 my @alpha = ('A'..'Z', 'AA'..'ZZ');
1684 : jj 3136 my $letter;
1685 : sh002i 1050 my $out= &M3(
1686 :     "\\begin{enumerate}\n",
1687 :     " \\begin{rawhtml} <OL TYPE=\"A\" VALUE=\"1\"> \\end{rawhtml} ",
1688 : jj 3136 # kludge to fix IE/CSS problem
1689 :     #"<OL TYPE=\"A\" VALUE=\"1\">\n"
1690 :     "<BLOCKQUOTE>\n"
1691 : sh002i 1050 ) ;
1692 :     my $elem;
1693 :     foreach $elem (@array) {
1694 : jj 3136 $letter = shift @alpha;
1695 : sh002i 1050 $out .= MODES(
1696 : gage 1267 TeX=> "\\item[$ALPHABET[$i].] $elem\n",
1697 : sh002i 1050 Latex2HTML=> " \\begin{rawhtml} <LI> \\end{rawhtml} $elem ",
1698 : jj 3136 #HTML=> "<LI> $elem\n",
1699 :     HTML=> "<br /> <b>$letter.</b> $elem\n",
1700 :     #HTML_dpng=> "<LI> $elem <br /> <br /> \n"
1701 :     HTML_dpng=> "<br /> <b>$letter.</b> $elem \n"
1702 : sh002i 1050 );
1703 :     $i++;
1704 :     }
1705 :     $out .= &M3(
1706 :     "\\end{enumerate}\n",
1707 :     " \\begin{rawhtml} </OL>\n \\end{rawhtml} ",
1708 : jj 3136 #"</OL>\n"
1709 :     "</BLOCKQUOTE>\n"
1710 : sh002i 1050 ) ;
1711 :     }
1712 :    
1713 :     sub htmlLink {
1714 :     my $url = shift;
1715 :     my $text = shift;
1716 :     my $options = shift;
1717 :     $options = "" unless defined($options);
1718 : gage 1267 return "$BBOLD\[ broken link: $text \] $EBOLD" unless defined($url);
1719 : dpvc 2392 M3( "{\\bf \\underline{$text}}",
1720 :     "\\begin{rawhtml}<A HREF=\"$url\" $options>$text</A>\\end{rawhtml}",
1721 :     "<A HREF=\"$url\" $options>$text</A>"
1722 : sh002i 1050 );
1723 :     }
1724 : gage 1267
1725 : jj 2173
1726 :     sub helpLink {
1727 :     my $type1 = shift;
1728 :     return "" if(not defined($envir{'localHelpURL'}));
1729 :     my $type = lc($type1);
1730 :     my %typeHash = (
1731 :     'interval notation' => 'IntervalNotation.html',
1732 :     'units' => 'Units.html',
1733 :     );
1734 :    
1735 :     my $infoRef = $typeHash{$type};
1736 :     return htmlLink( $envir{'localHelpURL'}.$infoRef, $type1,
1737 :     'target="ww_help" onclick="window.open(this.href,this.target,\'width=550,height=350,scrollbars=yes,resizable=on\'); return false;"');
1738 :     }
1739 :    
1740 : sh002i 1050 sub appletLink {
1741 :     my $url = shift;
1742 :     my $options = shift;
1743 :     $options = "" unless defined($options);
1744 :     M3( "{\\bf \\underline{APPLET} }",
1745 :     "\\begin{rawhtml} <APPLET $url> $options </APPLET>\\end{rawhtml}",
1746 :     "<APPLET $url> $options </APPLET>"
1747 :     );
1748 :     }
1749 :     sub spf {
1750 :     my($number,$format) = @_; # attention, the order of format and number are reversed
1751 :     $format = "%4.3g" unless $format; # default value for format
1752 :     sprintf($format, $number);
1753 :     }
1754 :     sub sspf {
1755 :     my($number,$format) = @_; # attention, the order of format and number are reversed
1756 :     $format = "%4.3g" unless $format; # default value for format
1757 :     my $sign = $number>=0 ? " + " : " - ";
1758 :     $number = $number>=0 ? $number : -$number;
1759 :     $sign .sprintf($format, $number);
1760 :     }
1761 :    
1762 :     =head2 Sorting and other list macros
1763 :    
1764 :    
1765 :    
1766 :     Usage:
1767 :     lex_sort(@list); # outputs list in lexigraphic (alphabetical) order
1768 :     num_sort(@list); # outputs list in numerical order
1769 :     uniq( @list); # outputs a list with no duplicates. Order is unspecified.
1770 :    
1771 :     PGsort( \&sort_subroutine, @list);
1772 : apizer 2143 # &sort_subroutine defines order. It's output must be 1 or 0 (true or false)
1773 : sh002i 1050
1774 :     =cut
1775 :    
1776 :     # uniq gives unique elements of a list:
1777 :     sub uniq {
1778 :     my (@in) =@_;
1779 :     my %temp = ();
1780 :     while (@in) {
1781 :     $temp{shift(@in)}++;
1782 :     }
1783 :     my @out = keys %temp; # sort is causing trouble with Safe.??
1784 :     @out;
1785 :     }
1786 :    
1787 :     sub lex_sort {
1788 : apizer 2143 PGsort sub {$_[0] lt $_[1]}, @_;
1789 : sh002i 1050 }
1790 :     sub num_sort {
1791 : apizer 2143 PGsort sub {$_[0] < $_[1]}, @_;
1792 : sh002i 1050 }
1793 :    
1794 :    
1795 :     =head2 Macros for handling tables
1796 :    
1797 :     Usage:
1798 :     begintable( number_of_columns_in_table)
1799 :     row(@dataelements)
1800 :     endtable()
1801 :    
1802 :     Example of useage:
1803 :    
1804 :     BEGIN_TEXT
1805 :     This problem tests calculating new functions from old ones:$BR
1806 :     From the table below calculate the quantities asked for:$BR
1807 :     \{begintable(scalar(@firstrow)+1)\}
1808 :     \{row(" \(x\) ",@firstrow)\}
1809 :     \{row(" \(f(x)\) ", @secondrow)\}
1810 :     \{row(" \(g(x)\) ", @thirdrow)\}
1811 :     \{row(" \(f'(x)\) ", @fourthrow)\}
1812 :     \{row(" \(g'(x)\) ", @fifthrow)\}
1813 :     \{endtable()\}
1814 :    
1815 :     (The arrays contain numbers which are placed in the table.)
1816 :    
1817 :     END_TEXT
1818 :    
1819 :     =cut
1820 :    
1821 :     sub begintable {
1822 :     my ($number)=shift; #number of columns in table
1823 :     my %options = @_;
1824 :     warn "begintable(cols) requires a number indicating the number of columns" unless defined($number);
1825 :     my $out = "";
1826 :     if ($displayMode eq 'TeX') {
1827 :     $out .= "\n\\par\\smallskip\\begin{center}\\begin{tabular}{" . "|c" x $number . "|} \\hline\n";
1828 :     }
1829 :     elsif ($displayMode eq 'Latex2HTML') {
1830 :     $out .= "\n\\begin{rawhtml} <TABLE , BORDER=1>\n\\end{rawhtml}";
1831 :     }
1832 : dpvc 2199 elsif ($displayMode eq 'HTML' || $displayMode eq 'HTML_tth' || $displayMode eq 'HTML_dpng' || $displayMode eq 'HTML_img' || $displayMode eq 'HTML_jsMath' || $displayMode eq 'HTML_asciimath') {
1833 : sh002i 1050 $out .= "<TABLE BORDER=1>\n"
1834 :     }
1835 : apizer 1080 else {
1836 : apizer 1379 $out = "Error: PGbasicmacros: begintable: Unknown displayMode: $displayMode.\n";
1837 : sh002i 1050 }
1838 :     $out;
1839 :     }
1840 :    
1841 :     sub endtable {
1842 :     my $out = "";
1843 :     if ($displayMode eq 'TeX') {
1844 :     $out .= "\n\\end {tabular}\\end{center}\\par\\smallskip\n";
1845 :     }
1846 :     elsif ($displayMode eq 'Latex2HTML') {
1847 :     $out .= "\n\\begin{rawhtml} </TABLE >\n\\end{rawhtml}";
1848 :     }
1849 : dpvc 2199 elsif ($displayMode eq 'HTML' || $displayMode eq 'HTML_tth' || $displayMode eq 'HTML_dpng' ||$displayMode eq 'HTML_img' || $displayMode eq 'HTML_jsMath' || $displayMode eq 'HTML_asciimath') {
1850 : sh002i 1050 $out .= "</TABLE>\n";
1851 :     }
1852 :     else {
1853 : apizer 1379 $out = "Error: PGbasicmacros: endtable: Unknown displayMode: $displayMode.\n";
1854 : sh002i 1050 }
1855 :     $out;
1856 :     }
1857 :    
1858 :    
1859 :     sub row {
1860 :     my @elements = @_;
1861 :     my $out = "";
1862 :     if ($displayMode eq 'TeX') {
1863 :     while (@elements) {
1864 :     $out .= shift(@elements) . " &";
1865 :     }
1866 :     chop($out); # remove last &
1867 :     $out .= "\\\\ \\hline \n";
1868 :     # carriage returns must be added manually for tex
1869 :     }
1870 :     elsif ($displayMode eq 'Latex2HTML') {
1871 :     $out .= "\n\\begin{rawhtml}\n<TR>\n\\end{rawhtml}\n";
1872 :     while (@elements) {
1873 :     $out .= " \n\\begin{rawhtml}\n<TD> \n\\end{rawhtml}\n" . shift(@elements) . " \n\\begin{rawhtml}\n</TD> \n\\end{rawhtml}\n";
1874 :     }
1875 :     $out .= " \n\\begin{rawhtml}\n</TR> \n\\end{rawhtml}\n";
1876 :     }
1877 : dpvc 2199 elsif ($displayMode eq 'HTML' || $displayMode eq 'HTML_tth' || $displayMode eq 'HTML_dpng'||$displayMode eq 'HTML_img' || $displayMode eq 'HTML_jsMath' || $displayMode eq 'HTML_asciimath') {
1878 : sh002i 1050 $out .= "<TR>\n";
1879 :     while (@elements) {
1880 :     $out .= "<TD>" . shift(@elements) . "</TD>";
1881 :     }
1882 :     $out .= "\n</TR>\n";
1883 :     }
1884 :     else {
1885 : apizer 1379 $out = "Error: PGbasicmacros: row: Unknown displayMode: $displayMode.\n";
1886 : sh002i 1050 }
1887 :     $out;
1888 :     }
1889 :    
1890 :     =head2 Macros for displaying static images
1891 :    
1892 :     Usage:
1893 :     $string = image($image, width => 100, height => 100, tex_size => 800)
1894 : jj 2443 $string = image($image, width => 100, height => 100, extra_html_tags => 'align="middle"', tex_size => 800)
1895 : sh002i 1050 $string = image([$image1, $image2], width => 100, height => 100, tex_size => 800)
1896 :     $string = caption($string);
1897 :     $string = imageRow([$image1, $image2 ], [$caption1, $caption2]);
1898 :     # produces a complete table with rows of pictures.
1899 :    
1900 :    
1901 :     =cut
1902 :    
1903 :     # More advanced macros
1904 :     sub image {
1905 :     my $image_ref = shift;
1906 :     my @opt = @_;
1907 :     unless (scalar(@opt) % 2 == 0 ) {
1908 :     warn "ERROR in image macro. A list of macros must be inclosed in square brackets.";
1909 :     }
1910 :     my %in_options = @opt;
1911 :     my %known_options = (
1912 :     width => 100,
1913 :     height => 100,
1914 :     tex_size => 800,
1915 : jj 2443 extra_html_tags => '',
1916 : sh002i 1050 );
1917 :     # handle options
1918 :     my %out_options = %known_options;
1919 :     foreach my $opt_name (keys %in_options) {
1920 :     if ( exists( $known_options{$opt_name} ) ) {
1921 :     $out_options{$opt_name} = $in_options{$opt_name} if exists( $in_options{$opt_name} ) ;
1922 :     } else {
1923 :     die "Option $opt_name not defined for image. " .
1924 :     "Default options are:<BR> ", display_options2(%known_options);
1925 :     }
1926 :     }
1927 :     my $width = $out_options{width};
1928 :     my $height = $out_options{height};
1929 :     my $tex_size = $out_options{tex_size};
1930 :     my $width_ratio = $tex_size*(.001);
1931 :     my @image_list = ();
1932 :    
1933 :     if (ref($image_ref) =~ /ARRAY/ ) {
1934 :     @image_list = @{$image_ref};
1935 :     } else {
1936 :     push(@image_list,$image_ref);
1937 :     }
1938 : apizer 1080
1939 : gage 1071 my @output_list = ();
1940 : sh002i 1050 while(@image_list) {
1941 :     my $imageURL = alias(shift @image_list);
1942 :     my $out="";
1943 : apizer 1080
1944 : gage 1267 if ($displayMode eq 'TeX') {
1945 : sh002i 1050 my $imagePath = $imageURL; # in TeX mode, alias gives us a path, not a URL
1946 : sh002i 1550 if (defined $envir->{texDisposition} and $envir->{texDisposition} eq "pdf") {
1947 : sh002i 1050 # We're going to create PDF files with our TeX (using pdflatex), so
1948 :     # alias should have given us the path to a PNG image. What we need
1949 :     # to do is find out the dimmensions of this image, since pdflatex
1950 :     # is too dumb to live.
1951 : apizer 1080
1952 : sh002i 1050 #my ($height, $width) = getImageDimmensions($imagePath);
1953 :     ##warn "&image: $imagePath $height $width\n";
1954 :     #unless ($height and $width) {
1955 :     # warn "Couldn't get the dimmensions of image $imagePath.\n"
1956 :     #}
1957 :     #$out = "\\includegraphics[bb=0 0 $height $width,width=$width_ratio\\linewidth]{$imagePath}\n";
1958 :     $out = "\\includegraphics[width=$width_ratio\\linewidth]{$imagePath}\n";
1959 :     } else {
1960 :     # Since we're not creating PDF files, alias should have given us the
1961 :     # path to an EPS file. latex can get its dimmensions no problem!
1962 : apizer 1080
1963 : sh002i 1050 $out = "\\includegraphics[width=$width_ratio\\linewidth]{$imagePath}\n";
1964 :     }
1965 : gage 1267 } elsif ($displayMode eq 'Latex2HTML') {
1966 : jj 2215 my $wid = ($envir->{onTheFlyImageSize} || 0)+ 30;
1967 :     $out = qq!\\begin{rawhtml}\n<A HREF= "$imageURL" TARGET="_blank" onclick="window.open(this.href,this.target, 'width=$wid,height=$wid,scrollbars=yes,resizable=on'); return false;"><IMG SRC="$imageURL" WIDTH="$width" HEIGHT="$height"></A>\n
1968 : sh002i 1050 \\end{rawhtml}\n !
1969 : dpvc 2199 } elsif ($displayMode eq 'HTML' || $displayMode eq 'HTML_tth' || $displayMode eq 'HTML_dpng' || $displayMode eq 'HTML_img' || $displayMode eq 'HTML_jsMath' || $displayMode eq 'HTML_asciimath') {
1970 : jj 2215 my $wid = ($envir->{onTheFlyImageSize} || 0) +30;
1971 : jj 2443 $out = qq!<A HREF= "$imageURL" TARGET="_blank" onclick="window.open(this.href,this.target, 'width=$wid,height=$wid,scrollbars=yes,resizable=on'); return false;"><IMG SRC="$imageURL" WIDTH="$width" HEIGHT="$height" $out_options{extra_html_tags} ></A>
1972 : sh002i 1050 !
1973 :     } else {
1974 : apizer 1379 $out = "Error: PGbasicmacros: image: Unknown displayMode: $displayMode.\n";
1975 : sh002i 1050 }
1976 :     push(@output_list, $out);
1977 :     }
1978 :     return wantarray ? @output_list : $output_list[0];
1979 :     }
1980 :    
1981 :     # This is legacy code.
1982 :     sub images {
1983 :     my @in = @_;
1984 :     my @outlist = ();
1985 :     while (@in) {
1986 :     push(@outlist,&image( shift(@in) ) );
1987 :     }
1988 :     @outlist;
1989 :     }
1990 :    
1991 :    
1992 :     sub caption {
1993 :     my ($out) = @_;
1994 : gage 1267 $out = " $out \n" if $displayMode eq 'TeX';
1995 :     $out = " $out " if $displayMode eq 'HTML';
1996 :     $out = " $out " if $displayMode eq 'HTML_tth';
1997 :     $out = " $out " if $displayMode eq 'HTML_dpng';
1998 :     $out = " $out " if $displayMode eq 'HTML_img';
1999 : dpvc 2166 $out = " $out " if $displayMode eq 'HTML_jsMath';
2000 : dpvc 2199 $out = " $out " if $displayMode eq 'HTML_asciimath';
2001 : gage 1267 $out = " $out " if $displayMode eq 'Latex2HTML';
2002 : sh002i 1050 $out;
2003 :     }
2004 :    
2005 :     sub captions {
2006 :     my @in = @_;
2007 :     my @outlist = ();
2008 :     while (@in) {
2009 :     push(@outlist,&caption( shift(@in) ) );
2010 :     }
2011 :     @outlist;
2012 :     }
2013 :    
2014 :     sub imageRow {
2015 :    
2016 :     my $pImages = shift;
2017 :     my $pCaptions=shift;
2018 :     my $out = "";
2019 :     my @images = @$pImages;
2020 :     my @captions = @$pCaptions;
2021 :     my $number = @images;
2022 :     # standard options
2023 :     my %options = ( 'tex_size' => 200, # width for fitting 4 across
2024 :     'height' => 100,
2025 :     'width' => 100,
2026 :     @_ # overwrite any default options
2027 :     );
2028 :    
2029 : gage 1267 if ($displayMode eq 'TeX') {
2030 : sh002i 1050 $out .= "\n\\par\\smallskip\\begin{center}\\begin{tabular}{" . "|c" x $number . "|} \\hline\n";
2031 :     while (@images) {
2032 :     $out .= &image( shift(@images),%options ) . '&';
2033 :     }
2034 :     chop($out);
2035 :     $out .= "\\\\ \\hline \n";
2036 :     while (@captions) {
2037 :     $out .= &caption( shift(@captions) ) . '&';
2038 :     }
2039 :     chop($out);
2040 :     $out .= "\\\\ \\hline \n\\end {tabular}\\end{center}\\par\\smallskip\n";
2041 : gage 1267 } elsif ($displayMode eq 'Latex2HTML'){
2042 : sh002i 1050
2043 :     $out .= "\n\\begin{rawhtml} <TABLE BORDER=1><TR>\n\\end{rawhtml}\n";
2044 :     while (@images) {
2045 :     $out .= "\n\\begin{rawhtml} <TD>\n\\end{rawhtml}\n" . &image( shift(@images),%options )
2046 :     . "\n\\begin{rawhtml} </TD>\n\\end{rawhtml}\n" ;
2047 :     }
2048 :    
2049 :     $out .= "\n\\begin{rawhtml}</TR><TR>\\end{rawhtml}\n";
2050 :     while (@captions) {
2051 :     $out .= "\n\\begin{rawhtml} <TH>\n\\end{rawhtml}\n".&caption( shift(@captions) )
2052 :     . "\n\\begin{rawhtml} </TH>\n\\end{rawhtml}\n" ;
2053 :     }
2054 :    
2055 :     $out .= "\n\\begin{rawhtml} </TR> </TABLE >\n\\end{rawhtml}";
2056 : dpvc 2199 } elsif ($displayMode eq 'HTML' || $displayMode eq 'HTML_tth' || $displayMode eq 'HTML_dpng'|| $displayMode eq 'HTML_img' || $displayMode eq 'HTML_jsMath' || $displayMode eq 'HTML_asciimath'){
2057 : sh002i 1050 $out .= "<P>\n <TABLE BORDER=2 CELLPADDING=3 CELLSPACING=2 ><TR ALIGN=CENTER VALIGN=MIDDLE>\n";
2058 :     while (@images) {
2059 :     $out .= " \n<TD>". &image( shift(@images),%options ) ."</TD>";
2060 :     }
2061 :     $out .= "</TR>\n<TR>";
2062 :     while (@captions) {
2063 :     $out .= " <TH>". &caption( shift(@captions) ) ."</TH>";
2064 :     }
2065 :     $out .= "\n</TR></TABLE></P>\n"
2066 :     }
2067 :     else {
2068 : apizer 1379 $out = "Error: PGbasicmacros: imageRow: Unknown languageMode: $displayMode.\n";
2069 : sh002i 1050 warn $out;
2070 :     }
2071 :     $out;
2072 :     }
2073 :    
2074 :    
2075 :     ###########
2076 :     # Auxiliary macros
2077 :    
2078 :     sub display_options2{
2079 :     my %options = @_;
2080 :     my $out_string = "";
2081 :     foreach my $key (keys %options) {
2082 :     $out_string .= " $key => $options{$key},<BR>";
2083 :     }
2084 :     $out_string;
2085 :     }
2086 :    
2087 :    
2088 :     1;

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