Annotation of loncom/interface/spreadsheet/Spreadsheet.pm, revision 1.85
1.1 matthew 1: #
1.85 ! raeburn 2: # $Id: Spreadsheet.pm,v 1.84 2014/02/28 19:20:11 bisitz Exp $
1.1 matthew 3: #
4: # Copyright Michigan State University Board of Trustees
5: #
6: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
7: #
8: # LON-CAPA is free software; you can redistribute it and/or modify
9: # it under the terms of the GNU General Public License as published by
10: # the Free Software Foundation; either version 2 of the License, or
11: # (at your option) any later version.
12: #
13: # LON-CAPA is distributed in the hope that it will be useful,
14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: # GNU General Public License for more details.
17: #
18: # You should have received a copy of the GNU General Public License
19: # along with LON-CAPA; if not, write to the Free Software
20: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21: #
22: # /home/httpd/html/adm/gpl.txt
23: #
24: # http://www.lon-capa.org/
25: #
26: # The LearningOnline Network with CAPA
27: # Spreadsheet/Grades Display Handler
28: #
29: # POD required stuff:
30:
31: =head1 NAME
32:
33: Spreadsheet
34:
35: =head1 SYNOPSIS
36:
37: =head1 DESCRIPTION
38:
39: =over 4
40:
41: =cut
42:
43: ###################################################
44: ###################################################
45: ### Spreadsheet ###
46: ###################################################
47: ###################################################
48: package Apache::Spreadsheet;
49:
50: use strict;
1.24 matthew 51: #use warnings FATAL=>'all';
52: #no warnings 'uninitialized';
1.1 matthew 53: use Apache::Constants qw(:common :http);
54: use Apache::lonnet;
55: use Safe;
56: use Safe::Hole;
57: use Opcode;
58: use HTML::Entities();
59: use HTML::TokeParser;
60: use Spreadsheet::WriteExcel;
61: use Time::HiRes;
1.28 www 62: use Apache::lonlocal;
1.69 www 63: use lib '/home/httpd/lib/perl/';
64: use LONCAPA;
65:
1.1 matthew 66:
67: ##
68: ## Package Variables
69: ##
70: my %expiredates;
71:
72: my @UC_Columns = split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZ');
73: my @LC_Columns = split(//,'abcdefghijklmnopqrstuvwxyz');
74:
75: ######################################################
76:
77: =pod
78:
79: =item &new
80:
81: Returns a new spreadsheet object.
82:
83: =cut
84:
85: ######################################################
86: sub new {
87: my $this = shift;
88: my $class = ref($this) || $this;
89: my ($stype) = ($class =~ /Apache::(.*)$/);
90: #
1.68 raeburn 91: my ($name,$domain,$filename,$usymb,$section,$groups)=@_;
1.39 matthew 92: if (defined($usymb) && ref($usymb)) {
93: $usymb = $usymb->symb;
94: }
1.36 matthew 95: if (! defined($name) || $name eq '') {
1.41 albertel 96: $name = $env{'user.name'};
1.36 matthew 97: }
98: if (! defined($domain) || $domain eq '') {
1.41 albertel 99: $domain = $env{'user.domain'};
1.36 matthew 100: }
1.66 albertel 101: if (! defined($section) || $section eq '') {
102: $section = &Apache::lonnet::getsection($domain,$name,
103: $env{'request.course.id'});
104: }
1.68 raeburn 105: if (! defined($groups)) {
106:
107: my @usersgroups = &Apache::lonnet::get_users_groups($domain,$name,
1.67 raeburn 108: $env{'request.course.id'});
1.68 raeburn 109: $groups = \@usersgroups;
1.67 raeburn 110: }
1.1 matthew 111: #
112: my $self = {
113: name => $name,
114: domain => $domain,
1.66 albertel 115: section => $section,
1.68 raeburn 116: groups => $groups,
1.1 matthew 117: type => $stype,
118: symb => $usymb,
119: errorlog => '',
1.22 matthew 120: maxrow => 0,
1.41 albertel 121: cid => $env{'request.course.id'},
122: cnum => $env{'course.'.$env{'request.course.id'}.'.num'},
123: cdom => $env{'course.'.$env{'request.course.id'}.'.domain'},
124: coursedesc => $env{'course.'.$env{'request.course.id'}.'.description'},
125: coursefilename => $env{'request.course.fn'},
1.12 matthew 126: #
127: # Flags
128: temporary => 0, # true if this sheet has been modified but not saved
1.49 albertel 129: new_rows => 0, # true if this sheet has new rows
130: loaded => 0, # true if the formulas have been loaded
1.1 matthew 131: #
1.3 matthew 132: # blackout is used to determine if any data needs to be hidden from the
133: # student.
134: blackout => 0,
135: #
1.1 matthew 136: # Data storage
137: formulas => {},
138: constants => {},
139: rows => [],
140: row_source => {},
141: othersheets => [],
142: };
143: #
144: bless($self,$class);
1.50 albertel 145: $self->filename($filename);
1.1 matthew 146: #
147: return $self;
148: }
149:
150: ######################################################
151:
152: =pod
153:
154: =item &filename
155:
156: get or set the filename for a spreadsheet.
157:
158: =cut
159:
160: ######################################################
161: sub filename {
162: my $self = shift();
163: if (@_) {
164: my ($newfilename) = @_;
165: if (! defined($newfilename) || $newfilename eq 'Default' ||
1.13 matthew 166: $newfilename !~ /\w/ || $newfilename eq '') {
167: my $key = 'course.'.$self->{'cid'}.'.spreadsheet_default_'.
168: $self->{'type'};
1.41 albertel 169: if (exists($env{$key}) && $env{$key} ne '') {
170: $newfilename = $env{$key};
1.13 matthew 171: } else {
172: $newfilename = 'default_'.$self->{'type'};
1.1 matthew 173: }
1.13 matthew 174: }
1.71 albertel 175: if ($newfilename eq &mt('LON-CAPA Standard')) {
176: undef($newfilename);
177: } else {
178: if ($newfilename !~ /\w/ || $newfilename =~ /^\W*$/) {
179: $newfilename = 'default_'.$self->{'type'};
180: }
181: if ($newfilename !~ /^default\.$self->{'type'}$/ &&
182: $newfilename !~ /^\/res\/(.*)spreadsheet$/) {
183: if ($newfilename !~ /_$self->{'type'}$/) {
184: $newfilename =~ s/[\s_]*$//;
185: $newfilename .= '_'.$self->{'type'};
186: }
187: }
188: }
1.1 matthew 189: $self->{'filename'} = $newfilename;
190: return;
191: }
192: return $self->{'filename'};
193: }
194:
195: ######################################################
196:
197: =pod
198:
199: =item &make_default()
200:
201: Make the current spreadsheet file the default for the course. Expires all the
202: default spreadsheets.......!
203:
204: =cut
205:
206: ######################################################
207: sub make_default {
208: my $self = shift();
209: my $result = &Apache::lonnet::put('environment',
1.13 matthew 210: {'spreadsheet_default_'.$self->{'type'} => $self->filename()},
1.1 matthew 211: $self->{'cdom'},$self->{'cnum'});
212: return $result if ($result ne 'ok');
1.78 raeburn 213: &Apache::lonnet::appenv({'course.'.$self->{'cid'}.'.spreadsheet_default_'.
214: $self->{'type'} => $self->filename()});
1.1 matthew 215: my $symb = $self->{'symb'};
216: $symb = '' if (! defined($symb));
217: &Apache::lonnet::expirespread('','',$self->{'type'},$symb);
218: }
219:
220: ######################################################
221:
222: =pod
223:
224: =item &is_default()
225:
226: Returns 1 if the current spreadsheet is the default as specified in the
227: course environment. Returns 0 otherwise.
228:
229: =cut
230:
231: ######################################################
232: sub is_default {
233: my $self = shift;
234: # Check to find out if we are the default spreadsheet (filenames match)
1.56 albertel 235: my $default_filename = $env{'course.'.$self->{'cid'}.
236: '.spreadsheet_default_'.$self->{'type'}};
1.13 matthew 237: if ($default_filename =~ /^\s*$/) {
238: $default_filename = 'default_'.$self->{'type'};
239: }
1.1 matthew 240: return 1 if ($self->filename() eq $default_filename);
241: return 0;
1.11 matthew 242: }
243:
244: sub initialize {
245: # This method is here to remind you that it will be overridden by
246: # the descendents of the spreadsheet class.
1.1 matthew 247: }
248:
1.23 matthew 249: sub clear_package {
250: # This method is here to remind you that it will be overridden by
251: # the descendents of the spreadsheet class.
252: }
253:
254: sub cleanup {
255: my $self = shift();
256: $self->clear_package();
257: }
258:
1.1 matthew 259: sub initialize_spreadsheet_package {
260: &load_spreadsheet_expirationdates();
261: &clear_spreadsheet_definition_cache();
262: }
263:
264: sub load_spreadsheet_expirationdates {
265: undef %expiredates;
1.41 albertel 266: my $cid=$env{'request.course.id'};
1.1 matthew 267: my @tmp = &Apache::lonnet::dump('nohist_expirationdates',
1.41 albertel 268: $env{'course.'.$cid.'.domain'},
269: $env{'course.'.$cid.'.num'});
1.1 matthew 270: if (lc($tmp[0]) !~ /^error/){
271: %expiredates = @tmp;
272: }
273: }
274:
275: sub check_expiration_time {
276: my $self = shift;
277: my ($time)=@_;
1.22 matthew 278: return 0 if (! defined($time));
1.19 matthew 279: my ($key1,$key2,$key3,$key4,$key5);
280: # Description of keys
281: #
282: # key1: all sheets of this type have expired
283: # key2: all sheets of this type for this student
284: # key3: all sheets of this type in this map for this student
285: # key4: this assessment sheet for this student
286: # key5: this assessment sheet for all students
1.1 matthew 287: $key1 = '::'.$self->{'type'}.':';
288: $key2 = $self->{'name'}.':'.$self->{'domain'}.':'.$self->{'type'}.':';
289: $key3 = $key2.$self->{'container'} if (defined($self->{'container'}));
1.19 matthew 290: $key4 = $key2.$self->{'symb'} if (defined($self->{'symb'}));
291: $key5 = $key1.$self->{'symb'} if (defined($self->{'symb'}));
292: my $returnvalue = 1; # default to okay
293: foreach my $key ($key1,$key2,$key3,$key4,$key5) {
1.1 matthew 294: next if (! defined($key));
1.19 matthew 295: if (exists($expiredates{$key}) && $expiredates{$key} > $time) {
296: $returnvalue = 0; # need to recompute
1.1 matthew 297: }
298: }
1.19 matthew 299: return $returnvalue;
1.1 matthew 300: }
301:
302: ######################################################
303:
304: =pod
305:
306: =item &initialize_safe_space
307:
308: Returns the safe space required by a Spreadsheet object.
309:
310: =head 2 Safe Space Functions
311:
312: =over 4
313:
314: =cut
315:
316: ######################################################
1.25 matthew 317: {
318:
319: my $safeeval;
320:
1.1 matthew 321: sub initialize_safe_space {
1.25 matthew 322: my $self = shift;
1.38 matthew 323: my $usection = &Apache::lonnet::getsection($self->{'domain'},
324: $self->{'name'},
1.41 albertel 325: $env{'request.course.id'});
1.25 matthew 326: if (! defined($safeeval)) {
327: $safeeval = new Safe(shift);
328: my $safehole = new Safe::Hole;
329: $safeeval->permit("entereval");
330: $safeeval->permit(":base_math");
331: $safeeval->permit("sort");
332: $safeeval->deny(":base_io");
1.38 matthew 333: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&Apache::lonnet::EXT');
1.25 matthew 334: $safehole->wrap(\&mask,$safeeval,'&mask');
1.44 albertel 335: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&logthis');
1.25 matthew 336: $safeeval->share('$@');
1.46 albertel 337: # Holds the (computed, final) values for the sheet
338: # This is only written to by &calc, the spreadsheet computation routine.
339: # It is read by many functions
340: $safeeval->share('%sheet_values');
1.25 matthew 341: my $code=<<'ENDDEFS';
1.1 matthew 342: # ---------------------------------------------------- Inside of the safe space
343: #
344: # f: formulas
345: # t: intermediate format (variable references expanded)
346: # v: output values
347: # c: preloaded constants (A-column)
348: # rl: row label
349: # os: other spreadsheets (for student spreadsheet only)
1.46 albertel 350: undef %t; # Holds the forumlas of the spreadsheet to be computed. Set in
351: # &sett, which does the translation of strings like C5 into the value
352: # in C5. Used in &calc - %t holds the values that are actually eval'd.
1.1 matthew 353: undef %f; # Holds the formulas for each cell. This is the users
354: # (spreadsheet authors) data for each cell.
355: undef %c; # Holds the constants for a sheet. In the assessment
356: # sheets, this is the A column. Used in &MINPARM, &MAXPARM, &expandnamed,
357: # &sett, and &constants. There is no &getconstants.
358: # &constants is called by &loadstudent, &loadcourse, &load assessment,
359: undef @os; # Holds the names of other spreadsheets - this is used to specify
360: # the spreadsheets that are available for the assessment sheet.
361: # Set by &setothersheets. &setothersheets is called by &handler. A
362: # related subroutine is &othersheets.
363: $errorlog = '';
364: #
365: $maxrow = 0;
366: $type = '';
367: #
368: # filename/reference of the sheet
369: $filename = '';
370: #
371: # user data
372: $name = '';
373: $domain = '';
374: #
375: # course data
376: $csec = '';
377: $cnum = '';
378: $cdom = '';
379: $cid = '';
380: $coursefilename = '';
381: #
382: # symb
383: $usymb = '';
384: #
385: # error messages
386: $errormsg = '';
387: #
388: #-------------------------------------------------------
389:
390: =pod
391:
1.38 matthew 392: =item EXT(parameter)
393:
394: Calls the system EXT function to determine the value of the given parameter.
395:
396: =cut
397:
398: #-------------------------------------------------------
399: sub EXT {
1.61 albertel 400: my ($parameter,$specific_symb) = @_;
1.38 matthew 401: return '' if (! defined($parameter) || $parameter eq '');
402: $parameter =~ s/^parameter\./resource\./;
1.61 albertel 403: if ($specific_symb eq '') { $specific_symb = $symb; }
404: my $value = &Apache::lonnet::EXT($parameter,$specific_symb,$domain,$name,
405: $usection);
1.38 matthew 406: return $value;
407: }
408:
409: #-------------------------------------------------------
410:
411: =pod
412:
1.1 matthew 413: =item NUM(range)
414:
415: returns the number of items in the range.
416:
417: =cut
418:
419: #-------------------------------------------------------
420: sub NUM {
1.44 albertel 421: my $values=&get_values(@_);
422: my $num= scalar(@$values);
1.1 matthew 423: return $num;
424: }
425:
426: #-------------------------------------------------------
427:
428: =pod
429:
430: =item BIN(low,high,lower,upper)
431:
432: =cut
433:
434: #-------------------------------------------------------
435: sub BIN {
436: my ($low,$high,$lower,$upper)=@_;
1.44 albertel 437: my $values=&get_values($lower,$upper);
1.1 matthew 438: my $num=0;
1.44 albertel 439: foreach (@$values) {
440: if (($_>=$low) && ($_<=$high)) {
1.1 matthew 441: $num++;
442: }
443: }
444: return $num;
445: }
446:
447: #-------------------------------------------------------
448:
449: =pod
450:
451: =item SUM(range)
452:
453: returns the sum of items in the range.
454:
455: =cut
456:
457: #-------------------------------------------------------
458: sub SUM {
1.44 albertel 459: my $values=&get_values(@_);
1.1 matthew 460: my $sum=0;
1.44 albertel 461: foreach (@$values) {
462: $sum+=$_;
1.1 matthew 463: }
464: return $sum;
465: }
466:
467: #-------------------------------------------------------
468:
469: =pod
470:
471: =item MEAN(range)
472:
473: compute the average of the items in the range.
474:
475: =cut
476:
477: #-------------------------------------------------------
478: sub MEAN {
1.44 albertel 479: my $values=&get_values(@_);
1.1 matthew 480: my $sum=0;
481: my $num=0;
1.44 albertel 482: foreach (@$values) {
483: $sum+=$_;
1.1 matthew 484: $num++;
485: }
486: if ($num) {
487: return $sum/$num;
488: } else {
489: return undef;
490: }
491: }
492:
493: #-------------------------------------------------------
494:
495: =pod
496:
497: =item STDDEV(range)
498:
499: compute the standard deviation of the items in the range.
500:
501: =cut
502:
503: #-------------------------------------------------------
504: sub STDDEV {
1.44 albertel 505: my $values=&get_values(@_);
1.1 matthew 506: my $sum=0; my $num=0;
1.44 albertel 507: foreach (@$values) {
508: $sum+=$_;
1.1 matthew 509: $num++;
510: }
511: unless ($num>1) { return undef; }
512: my $mean=$sum/$num;
513: $sum=0;
1.44 albertel 514: foreach (@$values) {
515: $sum+=($_-$mean)**2;
1.1 matthew 516: }
517: return sqrt($sum/($num-1));
518: }
519:
520: #-------------------------------------------------------
521:
522: =pod
523:
524: =item PROD(range)
525:
526: compute the product of the items in the range.
527:
528: =cut
529:
530: #-------------------------------------------------------
531: sub PROD {
1.44 albertel 532: my $values=&get_values(@_);
1.1 matthew 533: my $prod=1;
1.44 albertel 534: foreach (@$values) {
535: $prod*=$_;
1.1 matthew 536: }
537: return $prod;
538: }
539:
540: #-------------------------------------------------------
541:
542: =pod
543:
544: =item MAX(range)
545:
546: compute the maximum of the items in the range.
547:
548: =cut
549:
550: #-------------------------------------------------------
551: sub MAX {
1.44 albertel 552: my $values=&get_values(@_);
1.1 matthew 553: my $max='-';
1.44 albertel 554: foreach (@$values) {
555: if (($_>$max) || ($max eq '-')) {
556: $max=$_;
1.1 matthew 557: }
558: }
559: return $max;
560: }
561:
562: #-------------------------------------------------------
563:
564: =pod
565:
566: =item MIN(range)
567:
568: compute the minimum of the items in the range.
569:
570: =cut
571:
572: #-------------------------------------------------------
573: sub MIN {
1.44 albertel 574: my $values=&get_values(@_);
1.1 matthew 575: my $min='-';
1.44 albertel 576: foreach (@$values) {
577: if (($_<$min) || ($min eq '-')) {
578: $min=$_;
1.1 matthew 579: }
580: }
581: return $min;
582: }
583:
584: #-------------------------------------------------------
585:
586: =pod
587:
588: =item SUMMAX(num,lower,upper)
589:
590: compute the sum of the largest 'num' items in the range from
591: 'lower' to 'upper'
592:
593: =cut
594:
595: #-------------------------------------------------------
596: sub SUMMAX {
597: my ($num,$lower,$upper)=@_;
1.44 albertel 598: my $values=&get_values($lower,$upper);
599: my @inside=sort {$a <=> $b} (@$values);
1.1 matthew 600: my $sum=0; my $i;
601: for ($i=$#inside;(($i>$#inside-$num) && ($i>=0));$i--) {
602: $sum+=$inside[$i];
603: }
604: return $sum;
605: }
606:
607: #-------------------------------------------------------
608:
609: =pod
610:
611: =item SUMMIN(num,lower,upper)
612:
613: compute the sum of the smallest 'num' items in the range from
614: 'lower' to 'upper'
615:
616: =cut
617:
618: #-------------------------------------------------------
619: sub SUMMIN {
620: my ($num,$lower,$upper)=@_;
1.44 albertel 621: my $values=&get_values($lower,$upper);
622: my @inside=sort {$a <=> $b} (@$values);
1.1 matthew 623: my $sum=0; my $i;
624: for ($i=0;(($i<$num) && ($i<=$#inside));$i++) {
625: $sum+=$inside[$i];
626: }
627: return $sum;
628: }
629:
630: #-------------------------------------------------------
631:
632: =pod
633:
634: =item MINPARM(parametername)
635:
636: Returns the minimum value of the parameters matching the parametername.
637: parametername should be a string such as 'duedate'.
638:
639: =cut
640:
641: #-------------------------------------------------------
642: sub MINPARM {
643: my ($expression) = @_;
644: my $min = undef;
645: foreach $parameter (keys(%c)) {
646: next if ($parameter !~ /$expression/);
647: if ((! defined($min)) || ($min > $c{$parameter})) {
648: $min = $c{$parameter}
649: }
650: }
651: return $min;
652: }
653:
654: #-------------------------------------------------------
655:
656: =pod
657:
658: =item MAXPARM(parametername)
659:
660: Returns the maximum value of the parameters matching the input parameter name.
661: parametername should be a string such as 'duedate'.
662:
663: =cut
664:
665: #-------------------------------------------------------
666: sub MAXPARM {
667: my ($expression) = @_;
668: my $max = undef;
669: foreach $parameter (keys(%c)) {
670: next if ($parameter !~ /$expression/);
671: if ((! defined($min)) || ($max < $c{$parameter})) {
672: $max = $c{$parameter}
673: }
674: }
675: return $max;
676: }
677:
1.75 albertel 678:
679: =pod
680:
681: =item PARM(parametername)
682:
683: Returns the value of the parameter matching the input parameter name.
684: parametername should be a string such as 'parameter_1_opendate'.
685:
686: =cut
687:
688: #-------------------------------------------------------
689: sub PARM {
690: return $c{$_[0]};
691: }
692:
1.45 albertel 693: #-------------------------------------------------------
694:
695: =pod
696:
697: =item &get_values($lower,$upper)
698:
699: Inputs: $lower and $upper, cell names ("X12" or "a150") or globs ("X*").
700:
701: Returns: an array ref of the values of the cells that exist in the
702: speced range
703:
704: =cut
705:
706: #-------------------------------------------------------
1.44 albertel 707: sub get_values {
708: my ($lower,$upper)=@_;
1.45 albertel 709: $upper = $lower if (! defined($upper));
1.44 albertel 710: my @values;
1.45 albertel 711: my ($la,$ld) = ($lower=~/([A-z]|\*)(\d+|\*)/);
712: my ($ua,$ud) = ($upper=~/([A-z]|\*)(\d+|\*)/);
713: my ($alpha,$num);
714: if ($ld ne '*' && $ud ne '*') {
1.44 albertel 715: my @alpha;
716: if (($la eq '*') || ($ua eq '*')) {
717: @alpha=('A'..'z');
718: } else {
1.45 albertel 719: if ($la gt $ua) { ($la,$ua)=($ua,$la); }
720: if ((lc($la) ne $la) && (lc($ua) eq $ua)) {
721: @alpha=($la..'Z','a'..$ua);
722: } else {
723: @alpha=($la..$ua);
724: }
725: }
726: my @num=($ld..$ud);
727: foreach my $a (@alpha) {
728: foreach my $n (@num) {
1.82 raeburn 729: if ((exists($sheet_values{$a.$n})) && ($sheet_values{$a.$n} ne '')) {
1.45 albertel 730: push(@values,$sheet_values{$a.$n});
731: }
1.44 albertel 732: }
733: }
1.45 albertel 734: return \@values;
735: } else {
1.60 albertel 736: $num = '([1-9]\d*)';
1.45 albertel 737: }
738: if (($la eq '*') || ($ua eq '*')) {
739: $alpha='[A-z]';
740: } else {
741: if ($la gt $ua) { ($la,$ua)=($ua,$la); }
742: $alpha=qq/[$la-$ua]/;
743: }
744: my $expression = '^'.$alpha.$num.'$';
1.82 raeburn 745: foreach my $item (grep(/$expression/,keys(%sheet_values))) {
746: unless ($sheet_values{$item} eq '') {
747: push(@values,$sheet_values{$item});
748: }
1.44 albertel 749: }
1.45 albertel 750: return \@values;
1.44 albertel 751: }
1.1 matthew 752:
753: sub calc {
754: my $notfinished = 1;
755: my $lastcalc = '';
756: my $depth = 0;
757: while ($notfinished) {
758: $notfinished=0;
759: while (my ($cell,$value) = each(%t)) {
760: my $old=$sheet_values{$cell};
1.65 bowersj2 761: $sheet_values{$cell}=eval $value;
1.1 matthew 762: # $errorlog .= $cell.' = '.$old.'->'.$sheet_values{$cell}."\n";
763: if ($@) {
764: undef %sheet_values;
765: return $cell.': '.$@;
766: }
767: if ($sheet_values{$cell} ne $old) {
768: $notfinished=1;
769: $lastcalc=$cell;
770: }
771: }
772: # $errorlog.="------------------------------------------------";
773:
774: $depth++;
775: if ($depth>100) {
776: undef %sheet_values;
1.83 bisitz 777: return $lastcalc.': '.&mt('Maximum calculation depth exceeded');
1.1 matthew 778: }
779: }
1.30 matthew 780: return 'okay';
1.1 matthew 781: }
782:
783: # ------------------------------------------- End of "Inside of the safe space"
784: ENDDEFS
1.25 matthew 785: $safeeval->reval($code);
786: }
1.1 matthew 787: $self->{'safe'} = $safeeval;
788: $self->{'root'} = $self->{'safe'}->root();
789: #
790: # Place some of the %$self items into the safe space except the safe space
791: # itself
792: my $initstring = '';
1.38 matthew 793: foreach (qw/name domain type symb cid csec coursefilename
1.48 albertel 794: cnum cdom/) {
1.1 matthew 795: $initstring.= qq{\$$_="$self->{$_}";};
796: }
1.38 matthew 797: $initstring.=qq{\$usection="$usection";};
1.1 matthew 798: $self->{'safe'}->reval($initstring);
799: return $self;
800: }
1.25 matthew 801:
802: }
803:
1.1 matthew 804: ######################################################
805:
806: =pod
807:
808: =back
809:
810: =cut
811:
812: ######################################################
813:
814: ##
815: ## sub add_hash_to_safe {} # spreadsheet, would like to destroy
816: ##
817:
818: #
819: # expandnamed used to reside in the safe space
820: #
821: sub expandnamed {
822: my $self = shift;
823: my $expression=shift;
824: if ($expression=~/^\&/) {
1.74 albertel 825: my ($func,$var,$formula)=($expression=~/^\&(\w+)\(([^\;]+)\;(.*)\)/s);
1.1 matthew 826: my @vars=split(/\W+/,$formula);
1.73 albertel 827: # make the list uniq
828: @vars = keys(%{{ map { $_ => 1 } @vars }});
1.1 matthew 829: my %values=();
830: foreach my $varname ( @vars ) {
1.20 matthew 831: if ($varname=~/^(parameter|stores|timestamp)/) {
832: $formula=~s/$varname/'$c{\''.$varname.'\'}'/ge;
1.76 albertel 833: $varname=~s/$var/\([\\w:\\- ]\+\)/g;
834: foreach (keys(%{$self->{'constants'}})) {
835: if ($_=~/$varname/) {
836: $values{$1}=1;
837: }
838: }
1.1 matthew 839: }
840: }
841: if ($func eq 'EXPANDSUM') {
842: my $result='';
843: foreach (keys(%values)) {
844: my $thissum=$formula;
845: $thissum=~s/$var/$_/g;
846: $result.=$thissum.'+';
847: }
848: $result=~s/\+$//;
1.64 bowersj2 849: return '('.$result.')';
1.1 matthew 850: } else {
851: return 0;
852: }
853: } else {
854: # it is not a function, so it is a parameter name
855: # We should do the following:
856: # 1. Take the list of parameter names
857: # 2. look through the list for ones that match the parameter we want
858: # 3. If there are no collisions, return the one that matches
859: # 4. If there is a collision, return 'bad parameter name error'
860: my $returnvalue = '';
861: my @matches = ();
1.14 matthew 862: my @values = ();
1.1 matthew 863: $#matches = -1;
1.14 matthew 864: while (my($parameter,$value) = each(%{$self->{'constants'}})) {
865: next if ($parameter !~ /$expression/);
866: push(@matches,$parameter);
867: push(@values,$value);
1.1 matthew 868: }
869: if (scalar(@matches) == 0) {
1.10 matthew 870: $returnvalue = '""';#'"unmatched parameter: '.$parameter.'"';
1.1 matthew 871: } elsif (scalar(@matches) == 1) {
872: # why do we not do this lookup here, instead of delaying it?
1.14 matthew 873: $returnvalue = $values[0];
1.1 matthew 874: } elsif (scalar(@matches) > 0) {
875: # more than one match. Look for a concise one
1.83 bisitz 876: $returnvalue = "'".&mt('non-unique parameter name: [_1]',$expression).'"';
1.14 matthew 877: for (my $i=0; $i<=$#matches;$i++) {
878: if ($matches[$i] =~ /^$expression$/) {
1.1 matthew 879: # why do we not do this lookup here?
1.14 matthew 880: $returnvalue = $values[$i];
1.1 matthew 881: }
882: }
883: } else {
884: # There was a negative number of matches, which indicates
885: # something is wrong with reality. Better warn the user.
1.85 ! raeburn 886: $returnvalue = "'".&mt('bizarre parameter: [_1]',$expression)."'";
1.1 matthew 887: }
888: return $returnvalue;
889: }
890: }
891:
892: sub sett {
893: my $self = shift;
894: my %t=();
1.46 albertel 895: undef(%Apache::Spreadsheet::sheet_values);
1.1 matthew 896: #
897: # Deal with the template row
898: foreach my $col ($self->template_cells()) {
899: next if ($col=~/^[A-Z]/);
900: foreach my $row ($self->rows()) {
901: # Get the name of this cell
902: my $cell=$col.$row;
903: # Grab the template declaration
904: $t{$cell}=$self->formula('template_'.$col);
905: # Replace '#' with the row number
906: $t{$cell}=~s/\#/$row/g;
907: # Replace '....' with ','
908: $t{$cell}=~s/\.\.+/\,/g;
909: # Replace 'A0' with the value from 'A0'
910: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
911: # Replace parameters
1.74 albertel 912: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/sge;
1.1 matthew 913: }
914: }
915: #
916: # Deal with the normal cells
917: while (my($cell,$formula) = each(%{$self->{'formulas'}})) {
918: next if ($_=~/^template\_/);
919: my ($col,$row) = ($cell =~ /^([A-z])(\d+)$/);
920: if ($row eq '0') {
921: $t{$cell}=$formula;
922: $t{$cell}=~s/\.\.+/\,/g;
923: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
1.74 albertel 924: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/sge;
1.1 matthew 925: } elsif ( $col =~ /^[A-Z]$/ ) {
1.42 albertel 926: if ($formula !~ /^\!/ && exists($self->{'constants'}->{$cell})
927: && $self->{'constants'}->{$cell} ne '') {
1.46 albertel 928: $Apache::Spreadsheet::sheet_values{$cell}=
929: eval($self->{'constants'}->{$cell});
1.1 matthew 930: }
931: } else { # $row > 1 and $col =~ /[a-z]
932: $t{$cell}=$formula;
933: $t{$cell}=~s/\.\.+/\,/g;
934: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
1.74 albertel 935: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/sge;
1.1 matthew 936: }
937: }
938: %{$self->{'safe'}->varglob('t')}=%t;
939: }
940:
941: ##
942: ## sync_safe_space: Called by calcsheet to make sure all the data we
943: # need to calculate is placed into the safe space
944: ##
945: sub sync_safe_space {
946: my $self = shift;
947: # Inside the safe space 'formulas' has a diabolical alter-ego named 'f'.
1.47 albertel 948: #%{$self->{'safe'}->varglob('f')}=%{$self->{'formulas'}};
1.1 matthew 949: # 'constants' leads a peaceful hidden life of 'c'.
950: %{$self->{'safe'}->varglob('c')}=%{$self->{'constants'}};
951: # 'othersheets' hides as 'os', a disguise few can penetrate.
1.47 albertel 952: #@{$self->{'safe'}->varglob('os')}=@{$self->{'othersheets'}};
1.1 matthew 953: }
954:
955: ##
956: ## Retrieve the error log from the safe space (used for debugging)
957: ##
958: sub get_errorlog {
959: my $self = shift;
960: $self->{'errorlog'} = $ { $self->{'safe'}->varglob('errorlog') };
961: return $self->{'errorlog'};
962: }
963:
964: ##
965: ## Clear the error log inside the safe space
966: ##
967: sub clear_errorlog {
968: my $self = shift;
969: $ {$self->{'safe'}->varglob('errorlog')} = '';
970: $self->{'errorlog'} = '';
971: }
972:
973: ##
974: ## constants: either set or get the constants
975: ##
976: sub constants {
977: my $self=shift;
978: my ($constants) = @_;
979: if (defined($constants)) {
980: if (! ref($constants)) {
981: my %tmp = @_;
982: $constants = \%tmp;
983: }
984: $self->{'constants'} = $constants;
985: return;
986: } else {
987: return %{$self->{'constants'}};
988: }
989: }
990:
991: ##
992: ## formulas: either set or get the formulas
993: ##
994: sub formulas {
995: my $self=shift;
996: my ($formulas) = @_;
997: if (defined($formulas)) {
998: if (! ref($formulas)) {
999: my %tmp = @_;
1000: $formulas = \%tmp;
1001: }
1002: $self->{'formulas'} = $formulas;
1003: $self->{'rows'} = [];
1004: $self->{'template_cells'} = [];
1.54 albertel 1005: $self->{'loaded'} = 1;
1.1 matthew 1006: return;
1007: } else {
1.54 albertel 1008: $self->check_formulas_loaded();
1009: return %{$self->{'formulas'}};
1010: }
1011: }
1012:
1013: sub check_formulas_loaded {
1014: my $self=shift;
1015: if (!$self->{'loaded'}) {
1016: $self->{'loaded'}=1;
1017: # Load in the spreadsheet definition
1018: if (exists($env{'form.workcopy'}) &&
1019: $self->{'type'} eq $env{'form.workcopy'}) {
1020: $self->load_tmp();
1021: } else {
1022: $self->load();
1.49 albertel 1023: }
1.1 matthew 1024: }
1025: }
1026:
1027: sub set_formula {
1028: my $self = shift;
1029: my ($cell,$formula) = @_;
1.54 albertel 1030: $self->check_formulas_loaded();
1.1 matthew 1031: $self->{'formulas'}->{$cell}=$formula;
1032: return;
1033: }
1034:
1035: ##
1036: ## formulas_keys: Return the keys to the formulas hash.
1037: ##
1038: sub formulas_keys {
1039: my $self = shift;
1.54 albertel 1040: $self->check_formulas_loaded();
1.1 matthew 1041: return keys(%{$self->{'formulas'}});
1042: }
1043:
1044: ##
1045: ## formula: Return the formula for a given cell in the spreadsheet
1046: ## returns '' if the cell does not have a formula or does not exist
1047: ##
1048: sub formula {
1049: my $self = shift;
1050: my $cell = shift;
1.54 albertel 1051: $self->check_formulas_loaded();
1.1 matthew 1052: if (defined($cell) && exists($self->{'formulas'}->{$cell})) {
1053: return $self->{'formulas'}->{$cell};
1054: }
1055: return '';
1056: }
1057:
1058: ##
1059: ## logthis: write the input to lonnet.log
1060: ##
1061: sub logthis {
1062: my $self = shift;
1063: my $message = shift;
1064: &Apache::lonnet::logthis($self->{'type'}.':'.
1065: $self->{'name'}.':'.$self->{'domain'}.':'.
1066: $message);
1067: return;
1068: }
1069:
1070: ##
1071: ## dump_formulas_to_log: makes lonnet.log huge...
1072: ##
1073: sub dump_formulas_to_log {
1074: my $self =shift;
1075: $self->logthis("Spreadsheet formulas");
1076: $self->logthis("--------------------------------------------------------");
1077: while (my ($cell, $formula) = each(%{$self->{'formulas'}})) {
1078: $self->logthis(' '.$cell.' = '.$formula);
1079: }
1080: $self->logthis("--------------------------------------------------------");}
1081:
1082: ##
1083: ## value: returns the computed value of a particular cell
1084: ##
1085: sub value {
1086: my $self = shift;
1087: my $cell = shift;
1088: if (defined($cell) && exists($self->{'values'}->{$cell})) {
1089: return $self->{'values'}->{$cell};
1090: }
1091: return '';
1092: }
1093:
1094: ##
1095: ## dump_values_to_log: makes lonnet.log huge...
1096: ##
1097: sub dump_values_to_log {
1098: my $self =shift;
1099: $self->logthis("Spreadsheet Values");
1100: $self->logthis("------------------------------------------------------");
1101: while (my ($cell, $value) = each(%{$self->{'values'}})) {
1102: $self->logthis(' '.$cell.' = '.$value);
1103: }
1104: $self->logthis("------------------------------------------------------");
1105: }
1106:
1107: ##
1108: ## Yet another debugging function
1109: ##
1110: sub dump_hash_to_log {
1111: my $self= shift();
1112: my %tmp = @_;
1113: if (@_<2) {
1114: %tmp = %{$_[0]};
1115: }
1116: $self->logthis('---------------------------- (begin hash dump)');
1117: while (my ($key,$val) = each (%tmp)) {
1118: $self->logthis(' '.$key.' = '.$val.':');
1119: }
1120: $self->logthis('---------------------------- (finished hash dump)');
1121: }
1122:
1123: ##
1124: ## rebuild_stats: rebuilds the rows and template_cells arrays
1125: ##
1126: sub rebuild_stats {
1127: my $self = shift;
1128: $self->{'rows'}=[];
1129: $self->{'template_cells'}=[];
1.54 albertel 1130: $self->check_formulas_loaded();
1.1 matthew 1131: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1132: push(@{$self->{'rows'}},$1) if ($cell =~ /^A(\d+)/ && $1 != 0);
1133: push(@{$self->{'template_cells'}},$1) if ($cell =~ /^template_(\w+)/);
1134: }
1135: return;
1136: }
1137:
1138: ##
1139: ## template_cells returns a list of the cells defined in the template row
1140: ##
1141: sub template_cells {
1142: my $self = shift;
1143: $self->rebuild_stats() if (! defined($self->{'template_cells'}) ||
1144: ! @{$self->{'template_cells'}});
1145: return @{$self->{'template_cells'}};
1146: }
1147:
1148: ##
1149: ## Sigh....
1150: ##
1151: sub setothersheets {
1152: my $self = shift;
1153: my @othersheets = @_;
1154: $self->{'othersheets'} = \@othersheets;
1155: }
1156:
1157: ##
1158: ## rows returns a list of the names of cells defined in the A column
1159: ##
1160: sub rows {
1161: my $self = shift;
1162: $self->rebuild_stats() if (!@{$self->{'rows'}});
1163: return @{$self->{'rows'}};
1164: }
1165:
1166: #
1167: # calcsheet: makes all the calls to compute the spreadsheet.
1168: #
1169: sub calcsheet {
1170: my $self = shift;
1171: $self->sync_safe_space();
1172: $self->clear_errorlog();
1173: $self->sett();
1174: my $result = $self->{'safe'}->reval('&calc();');
1175: # $self->logthis($self->get_errorlog());
1176: %{$self->{'values'}} = %{$self->{'safe'}->varglob('sheet_values')};
1177: # $self->logthis($self->get_errorlog());
1.30 matthew 1178: if ($result ne 'okay') {
1179: $self->set_calcerror($result);
1180: }
1.1 matthew 1181: return $result;
1182: }
1183:
1.30 matthew 1184: sub set_badcalc {
1185: my $self = shift();
1186: $self->{'badcalc'} =1;
1187: return;
1188: }
1189:
1190: sub badcalc {
1191: my $self = shift;
1192: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1193: return 1;
1194: } else {
1195: return 0;
1196: }
1197: }
1198:
1199: sub set_calcerror {
1200: my $self = shift;
1201: if (@_) {
1202: $self->set_badcalc();
1203: if (exists($self->{'calcerror'})) {
1204: $self->{'calcerror'}.="\n".$_[0];
1205: } else {
1206: $self->{'calcerror'}.=$_[0];
1207: }
1208: }
1209: }
1210:
1211: sub calcerror {
1212: my $self = shift;
1213: if ($self->badcalc()) {
1214: if (exists($self->{'calcerror'})) {
1215: return $self->{'calcerror'};
1216: }
1217: }
1218: return;
1219: }
1220:
1.1 matthew 1221: ###########################################################
1222: ##
1223: ## Output Helpers
1224: ##
1225: ###########################################################
1.5 matthew 1226: sub display {
1227: my $self = shift;
1228: my ($r) = @_;
1229: my $outputmode = 'html';
1.31 matthew 1230: foreach ($self->output_options()) {
1.41 albertel 1231: if ($env{'form.output_format'} eq $_->{'value'}) {
1.31 matthew 1232: $outputmode = $_->{'value'};
1233: last;
1234: }
1.5 matthew 1235: }
1.62 bowersj2 1236: $self->{outputmode} = $outputmode;
1.5 matthew 1237: if ($outputmode eq 'html') {
1.31 matthew 1238: $self->compute($r);
1.5 matthew 1239: $self->outsheet_html($r);
1.31 matthew 1240: } elsif ($outputmode eq 'htmlclasslist') {
1241: # No computation neccessary... This is kludgy
1242: $self->outsheet_htmlclasslist($r);
1.62 bowersj2 1243: } elsif ($outputmode eq 'source') {
1244: # No computation necessary. Rumor has it that this is some
1245: # sort of kludge w.r.t. not "computing". It's also
1246: # a bit of of a kludge that we call "outsheet_html" and
1247: # let the 'outputmode' cause the outputting of source.
1248: $self->outsheet_html($r);
1.5 matthew 1249: } elsif ($outputmode eq 'excel') {
1.31 matthew 1250: $self->compute($r);
1.5 matthew 1251: $self->outsheet_excel($r);
1252: } elsif ($outputmode eq 'csv') {
1.31 matthew 1253: $self->compute($r);
1.5 matthew 1254: $self->outsheet_csv($r);
1.33 matthew 1255: } elsif ($outputmode eq 'xml') {
1256: # $self->compute($r);
1257: $self->outsheet_xml($r);
1.5 matthew 1258: }
1.22 matthew 1259: $self->cleanup();
1.5 matthew 1260: return;
1261: }
1262:
1.1 matthew 1263: ############################################
1264: ## HTML output routines ##
1265: ############################################
1.30 matthew 1266: sub html_report_error {
1267: my $self = shift();
1268: my $Str = '';
1269: if ($self->badcalc()) {
1.83 bisitz 1270: $Str = '<p class="LC_error">'.
1.30 matthew 1271: &mt('An error occurred while calculating this spreadsheet').
1.83 bisitz 1272: "</p>\n".
1.30 matthew 1273: '<pre>'.$self->calcerror()."</pre>\n";
1274: }
1275: return $Str;
1276: }
1277:
1.1 matthew 1278: sub html_export_row {
1279: my $self = shift();
1.17 matthew 1280: my ($color) = @_;
1281: $color = '#CCCCFF' if (! defined($color));
1.41 albertel 1282: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1.1 matthew 1283: my $row_html;
1284: my @rowdata = $self->get_row(0);
1285: foreach my $cell (@rowdata) {
1286: if ($cell->{'name'} =~ /^[A-Z]/) {
1.17 matthew 1287: $row_html .= '<td bgcolor="'.$color.'">'.
1.62 bowersj2 1288: &html_editable_cell($cell,$color,$allowed,
1289: $self->{outputmode} eq 'source').'</td>';
1.1 matthew 1290: } else {
1291: $row_html .= '<td bgcolor="#DDCCFF">'.
1.62 bowersj2 1292: &html_editable_cell($cell,'#DDCCFF',$allowed,
1293: $self->{outputmode} eq 'source').'</td>';
1.1 matthew 1294: }
1295: }
1296: return $row_html;
1297: }
1298:
1299: sub html_template_row {
1300: my $self = shift();
1.41 albertel 1301: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1.17 matthew 1302: my ($num_uneditable,$importcolor) = @_;
1.1 matthew 1303: my $row_html;
1304: my @rowdata = $self->get_template_row();
1305: my $count = 0;
1306: for (my $i = 0; $i<=$#rowdata; $i++) {
1307: my $cell = $rowdata[$i];
1308: if ($i < $num_uneditable) {
1.17 matthew 1309: $row_html .= '<td bgcolor="'.$importcolor.'">'.
1.7 matthew 1310: &html_uneditable_cell($cell,'#FFDDDD',$allowed).'</td>';
1.1 matthew 1311: } else {
1.70 albertel 1312: $row_html .= '<td bgcolor="#E0FFDD">'.
1313: &html_editable_cell($cell,'#E0FFDD',$allowed,
1.62 bowersj2 1314: $self->{outputmode} eq 'source').'</td>';
1.1 matthew 1315: }
1316: }
1317: return $row_html;
1318: }
1319:
1320: sub html_editable_cell {
1.62 bowersj2 1321: my ($cell,$bgcolor,$allowed,$showsource) = @_;
1.1 matthew 1322: my $result;
1323: my ($name,$formula,$value);
1324: if (defined($cell)) {
1325: $name = $cell->{'name'};
1326: $formula = $cell->{'formula'};
1327: $value = $cell->{'value'};
1328: }
1329: $name = '' if (! defined($name));
1330: $formula = '' if (! defined($formula));
1.65 bowersj2 1331: if ($showsource) {
1.62 bowersj2 1332: if (!defined($formula) || $formula =~ /^\s*$/) {
1333: $value = '<font color="'.$bgcolor.'">#</font>';
1334: } else {
1335: $value = &HTML::Entities::encode($formula, '<>&"');
1336: }
1.65 bowersj2 1337: } elsif (! defined($value)) {
1.1 matthew 1338: $value = '<font color="'.$bgcolor.'">#</font>';
1339: if ($formula ne '') {
1340: $value = '<i>undefined value</i>';
1341: }
1342: } elsif ($value =~ /^\s*$/ ) {
1343: $value = '<font color="'.$bgcolor.'">#</font>';
1344: } else {
1.37 albertel 1345: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1.1 matthew 1346: }
1347: return $value if (! $allowed);
1.18 matthew 1348: #
1.1 matthew 1349: # The formula will be parsed by the browser twice before being
1.18 matthew 1350: # displayed to the user for editing.
1351: #
1352: # The encoding string "^A-blah" is placed in []'s inside a regexp, so
1353: # we specify the characters we want left alone by putting a '^' in front.
1.21 matthew 1354: $formula = &HTML::Entities::encode($formula,'^A-z0-9 !#$%-;=?~');
1355: # HTML::Entities::encode does not catch everything - we need '\' encoded
1356: $formula =~ s/\\/&\#092/g;
1.18 matthew 1357: # Escape it again - this time the only encodable character is '&'
1358: $formula =~ s/\&/\&/g;
1.1 matthew 1359: # Glue everything together
1360: $result .= "<a href=\"javascript:celledit(\'".
1361: $name."','".$formula."');\">".$value."</a>";
1362: return $result;
1363: }
1364:
1365: sub html_uneditable_cell {
1366: my ($cell,$bgcolor) = @_;
1367: my $value = (defined($cell) ? $cell->{'value'} : '');
1.37 albertel 1368: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1.1 matthew 1369: return ' '.$value.' ';
1370: }
1371:
1372: sub html_row {
1373: my $self = shift();
1.17 matthew 1374: my ($num_uneditable,$row,$exportcolor,$importcolor) = @_;
1.41 albertel 1375: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1.1 matthew 1376: my @rowdata = $self->get_row($row);
1377: my $num_cols_output = 0;
1378: my $row_html;
1.17 matthew 1379: my $color = $importcolor;
1380: if ($row == 0) {
1381: $color = $exportcolor;
1382: }
1383: $color = '#FFDDDD' if (! defined($color));
1.1 matthew 1384: foreach my $cell (@rowdata) {
1385: if ($num_cols_output++ < $num_uneditable) {
1.17 matthew 1386: $row_html .= '<td bgcolor="'.$color.'">';
1.1 matthew 1387: $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
1388: } else {
1.70 albertel 1389: $row_html .= '<td bgcolor="#E0FFDD">';
1.62 bowersj2 1390: $row_html .= &html_editable_cell($cell,'#E0FFDD',$allowed,
1391: $self->{outputmode} eq 'source');
1.1 matthew 1392: }
1393: $row_html .= '</td>';
1394: }
1395: return $row_html;
1396: }
1397:
1.5 matthew 1398: sub html_header {
1399: my $self = shift;
1.41 albertel 1400: return '' if (! $env{'request.role.adv'});
1.5 matthew 1401: return "<table>\n".
1.29 matthew 1402: '<tr><th align="center">'.&mt('Output Format').'</th></tr>'."\n".
1.31 matthew 1403: '<tr><td>'.$self->output_selector()."</td></tr>\n".
1.5 matthew 1404: "</table>\n";
1405: }
1406:
1.31 matthew 1407: ##
1408: ## Default output types are HTML, Excel, and CSV
1409: sub output_options {
1410: my $self = shift();
1411: return ({value => 'html',
1412: description => 'HTML'},
1413: {value => 'excel',
1414: description => 'Excel'},
1.62 bowersj2 1415: {value => 'source',
1416: description => 'Show Source'},
1.33 matthew 1417: # {value => 'xml',
1418: # description => 'XML'},
1.31 matthew 1419: {value => 'csv',
1420: description => 'Comma Separated Values'},);
1421: }
1422:
1.5 matthew 1423: sub output_selector {
1.31 matthew 1424: my $self = shift();
1.5 matthew 1425: my $output_selector = '<select name="output_format" size="3">'."\n";
1426: my $default = 'html';
1.41 albertel 1427: if (exists($env{'form.output_format'})) {
1428: $default = $env{'form.output_format'}
1.5 matthew 1429: } else {
1.41 albertel 1430: $env{'form.output_format'} = $default;
1.5 matthew 1431: }
1.31 matthew 1432: foreach ($self->output_options()) {
1433: $output_selector.='<option value="'.$_->{'value'}.'"';
1434: if ($_->{'value'} eq $default) {
1.83 bisitz 1435: $output_selector .= ' selected="selected"';
1.5 matthew 1436: }
1.31 matthew 1437: $output_selector .= ">".&mt($_->{'description'})."</option>\n";
1.5 matthew 1438: }
1439: $output_selector .= "</select>\n";
1440: return $output_selector;
1441: }
1442:
1443: ################################################
1444: ## Excel output routines ##
1445: ################################################
1446: sub excel_output_row {
1447: my $self = shift;
1448: my ($worksheet,$rownum,$rows_output,@prepend) = @_;
1449: my $cols_output = 0;
1450: #
1451: my @rowdata = $self->get_row($rownum);
1452: foreach my $cell (@prepend,@rowdata) {
1453: my $value = $cell;
1454: $value = $cell->{'value'} if (ref($value));
1455: $value =~ s/\ / /gi;
1456: $worksheet->write($rows_output,$cols_output++,$value);
1457: }
1458: return;
1459: }
1460:
1.31 matthew 1461: #
1462: # This routine is just a stub
1463: sub outsheet_htmlclasslist {
1464: my $self = shift;
1465: my ($r) = @_;
1466: $r->print('<h2>'.&mt("This output is not supported").'</h2>');
1467: $r->rflush();
1468: return;
1.5 matthew 1469: }
1470:
1471: sub outsheet_excel {
1472: my $self = shift;
1473: my ($r) = @_;
1.23 matthew 1474: my $connection = $r->connection();
1.32 matthew 1475: #
1476: $r->print($self->html_report_error());
1477: $r->rflush();
1478: #
1.28 www 1479: $r->print("<h2>".&mt('Preparing Excel Spreadsheet')."</h2>");
1.5 matthew 1480: #
1.40 matthew 1481: # Create excel workbook
1482: my ($workbook,$filename,$format)=&Apache::loncommon::create_workbook($r);
1.5 matthew 1483: return if (! defined($workbook));
1484: #
1485: # Create main worksheet
1486: my $worksheet = $workbook->addworksheet('main');
1487: my $rows_output = 0;
1488: my $cols_output = 0;
1489: #
1490: # Write excel header
1491: foreach my $value ($self->get_title()) {
1492: $cols_output = 0;
1.40 matthew 1493: $worksheet->write($rows_output++,$cols_output,$value,$format->{'h1'});
1.5 matthew 1494: }
1495: $rows_output++; # skip a line
1496: #
1497: # Write summary/export row
1498: $cols_output = 0;
1.40 matthew 1499: $self->excel_output_row($worksheet,0,$rows_output++,'Summary',
1500: $format->{'b'});
1.5 matthew 1501: $rows_output++; # skip a line
1502: #
1.40 matthew 1503: $self->excel_rows($connection,$worksheet,$cols_output,$rows_output,
1504: $format);
1.5 matthew 1505: #
1506: #
1507: # Close the excel file
1508: $workbook->close();
1509: #
1510: # Write a link to allow them to download it
1511: $r->print('<br />'.
1.83 bisitz 1512: '<a href="'.$filename.'">'.&mt('Your Excel spreadsheet').'</a>'."\n");
1.6 matthew 1513: return;
1514: }
1515:
1516: #################################
1517: ## CSV output routines ##
1518: #################################
1519: sub outsheet_csv {
1520: my $self = shift;
1521: my ($r) = @_;
1.23 matthew 1522: my $connection = $r->connection();
1.32 matthew 1523: #
1524: $r->print($self->html_report_error());
1525: $r->rflush();
1526: #
1.6 matthew 1527: my $csvdata = '';
1528: my @Values;
1529: #
1.80 bisitz 1530: # Open the CSV file
1.6 matthew 1531: my $filename = '/prtspool/'.
1.41 albertel 1532: $env{'user.name'}.'_'.$env{'user.domain'}.'_'.
1.6 matthew 1533: time.'_'.rand(1000000000).'.csv';
1534: my $file;
1535: unless ($file = Apache::File->new('>'.'/home/httpd'.$filename)) {
1536: $r->log_error("Couldn't open $filename for output $!");
1.81 bisitz 1537: $r->print(
1538: '<p class="LC_error">'
1539: .&mt('Problems occurred in writing the CSV file.')
1540: .' '.&mt('This error has been logged.')
1541: .' '.&mt('Please alert your LON-CAPA administrator.')
1542: .'</p>'
1543: );
1.6 matthew 1544: $r->print("<pre>\n".$csvdata."</pre>\n");
1545: return 0;
1546: }
1547: #
1548: # Output the title information
1549: foreach my $value ($self->get_title()) {
1550: print $file "'".&Apache::loncommon::csv_translate($value)."'\n";
1551: }
1552: #
1553: # Output the body of the spreadsheet
1.23 matthew 1554: $self->csv_rows($connection,$file);
1.6 matthew 1555: #
1.80 bisitz 1556: # Close the CSV file
1.6 matthew 1557: close($file);
1558: $r->print('<br /><br />'.
1.28 www 1559: '<a href="'.$filename.'">'.&mt('Your CSV spreadsheet.').'</a>'."\n");
1.6 matthew 1560: #
1561: return 1;
1562: }
1563:
1564: sub csv_output_row {
1565: my $self = shift;
1566: my ($filehandle,$rownum,@prepend) = @_;
1567: #
1568: my @rowdata = ();
1569: if (defined($rownum)) {
1570: @rowdata = $self->get_row($rownum);
1571: }
1572: my @output = ();
1573: foreach my $cell (@prepend,@rowdata) {
1574: my $value = $cell;
1575: $value = $cell->{'value'} if (ref($value));
1576: $value =~ s/\ / /gi;
1577: $value = "'".$value."'";
1578: push (@output,$value);
1579: }
1580: print $filehandle join(',',@output )."\n";
1.5 matthew 1581: return;
1.1 matthew 1582: }
1583:
1584: ############################################
1585: ## XML output routines ##
1586: ############################################
1587: sub outsheet_xml {
1588: my $self = shift;
1589: my ($r) = @_;
1590: ## Someday XML
1591: ## Will be rendered for the user
1592: ## But not on this day
1593: my $Str = '<spreadsheet type="'.$self->{'type'}.'">'."\n";
1.54 albertel 1594: $self->check_formulas_loaded();
1.1 matthew 1595: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1.34 matthew 1596: if ($cell =~ /^template_(\w+)/) {
1.1 matthew 1597: my $col = $1;
1598: $Str .= '<template col="'.$col.'">'.$formula.'</template>'."\n";
1599: } else {
1.33 matthew 1600: my ($col,$row) = ($cell =~ /^([A-z])(\d+)/);
1.1 matthew 1601: next if (! defined($row) || ! defined($col));
1.33 matthew 1602: next if ($row != 0);
1603: $Str .=
1604: '<field row="'.$row.'" col="'.$col.'" >'.$formula.'</field>'
1.1 matthew 1605: ."\n";
1606: }
1607: }
1608: $Str.="</spreadsheet>";
1.34 matthew 1609: $r->print("<pre>\n\n\n".$Str."\n\n\n</pre>");
1.1 matthew 1610: return $Str;
1611: }
1612:
1613: ############################################
1614: ### Filesystem routines ###
1615: ############################################
1616: sub parse_sheet {
1617: # $sheetxml is a scalar reference or a scalar
1618: my ($sheetxml) = @_;
1619: if (! ref($sheetxml)) {
1620: my $tmp = $sheetxml;
1621: $sheetxml = \$tmp;
1622: }
1623: my %formulas;
1624: my %sources;
1625: my $parser=HTML::TokeParser->new($sheetxml);
1626: my $token;
1627: while ($token=$parser->get_token) {
1628: if ($token->[0] eq 'S') {
1629: if ($token->[1] eq 'field') {
1630: my $cell = $token->[2]->{'col'}.$token->[2]->{'row'};
1631: my $source = $token->[2]->{'source'};
1632: my $formula = $parser->get_text('/field');
1633: $formulas{$cell} = $formula;
1634: $sources{$cell} = $source if (defined($source));
1635: $parser->get_text('/field');
1.34 matthew 1636: } elsif ($token->[1] eq 'template') {
1.1 matthew 1637: $formulas{'template_'.$token->[2]->{'col'}}=
1638: $parser->get_text('/template');
1639: }
1640: }
1641: }
1642: return (\%formulas,\%sources);
1643: }
1644:
1645: {
1646:
1647: my %spreadsheets;
1648:
1649: sub clear_spreadsheet_definition_cache {
1650: undef(%spreadsheets);
1651: }
1652:
1.13 matthew 1653: sub load_system_default_sheet {
1654: my $self = shift;
1655: my $includedir = $Apache::lonnet::perlvar{'lonIncludes'};
1656: # load in the default defined spreadsheet
1657: my $sheetxml='';
1658: my $fh;
1659: if ($fh=Apache::File->new($includedir.'/default_'.$self->{'type'})) {
1660: $sheetxml=join('',<$fh>);
1661: $fh->close();
1662: } else {
1663: # $sheetxml='<field row="0" col="A">"Error"</field>';
1664: $sheetxml='<field row="0" col="A"></field>';
1665: }
1666: $self->filename('default_');
1667: my ($formulas,undef) = &parse_sheet(\$sheetxml);
1668: return $formulas;
1669: }
1670:
1.1 matthew 1671: sub load {
1672: my $self = shift;
1673: #
1674: my $stype = $self->{'type'};
1675: my $cnum = $self->{'cnum'};
1676: my $cdom = $self->{'cdom'};
1677: #
1.13 matthew 1678: my $filename = $self->filename();
1.1 matthew 1679: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1680: #
1681: # see if sheet is cached
1682: my ($formulas);
1683: if (exists($spreadsheets{$cachekey})) {
1684: $formulas = $spreadsheets{$cachekey}->{'formulas'};
1.51 albertel 1685: $self->formulas($formulas);
1686: $self->{'row_source'}=$spreadsheets{$cachekey}->{'row_source'};
1687: $self->{'row_numbers'}=$spreadsheets{$cachekey}->{'row_numbers'};
1688: $self->{'maxrow'}=$spreadsheets{$cachekey}->{'maxrow'};
1.57 albertel 1689: } else {
1.1 matthew 1690: # Not cached, need to read
1.13 matthew 1691: if (! defined($filename)) {
1692: $formulas = $self->load_system_default_sheet();
1.33 matthew 1693: } elsif($filename =~ /^\/res\/.*\.spreadsheet$/) {
1.1 matthew 1694: # Load a spreadsheet definition file
1695: my $sheetxml=&Apache::lonnet::getfile
1696: (&Apache::lonnet::filelocation('',$filename));
1697: if ($sheetxml == -1) {
1.83 bisitz 1698: $sheetxml='<field row="0" col="A">'.
1699: &mt('Error loading spreadsheet [_1]',
1700: '"'.$self->filename().'"').
1701: '</field>';
1.1 matthew 1702: }
1703: ($formulas,undef) = &parse_sheet(\$sheetxml);
1.13 matthew 1704: # Get just the filename and set the sheets filename
1705: my ($newfilename) = ($filename =~ /\/([^\/]*)\.spreadsheet$/);
1706: if ($self->is_default()) {
1707: $self->filename($newfilename);
1708: $self->make_default();
1709: } else {
1710: $self->filename($newfilename);
1711: }
1.1 matthew 1712: } else {
1713: # Load the spreadsheet definition file from the save file
1.13 matthew 1714: my %tmphash = &Apache::lonnet::dump($filename,$cdom,$cnum);
1.1 matthew 1715: my ($tmp) = keys(%tmphash);
1.71 albertel 1716: if (%tmphash
1717: && $tmp !~ /^(con_lost|error|no_such_host)/i) {
1.1 matthew 1718: while (my ($cell,$formula) = each(%tmphash)) {
1719: $formulas->{$cell}=$formula;
1720: }
1721: } else {
1.13 matthew 1722: $formulas = $self->load_system_default_sheet();
1.1 matthew 1723: }
1724: }
1.51 albertel 1725: $self->formulas($formulas);
1726: $self->set_row_sources();
1727: $self->set_row_numbers();
1.57 albertel 1728: $self->cache_sheet($formulas);
1729: }
1730: }
1731:
1732: sub cache_sheet {
1733: my $self = shift;
1.59 albertel 1734: my ($formulas) = @_;
1.57 albertel 1735: my $stype = $self->{'type'};
1736: my $cnum = $self->{'cnum'};
1737: my $cdom = $self->{'cdom'};
1738: #
1739: my $filename = $self->filename();
1740: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1741:
1.58 albertel 1742: if (ref($formulas) eq 'HASH') {
1.57 albertel 1743: %{$spreadsheets{$cachekey}->{'formulas'}} = %{$formulas};
1744: }
1745: if (ref($self->{'row_source'})) {
1746: %{$spreadsheets{$cachekey}->{'row_source'}} =%{$self->{'row_source'}};
1747: }
1748: if (ref($self->{'row_numbers'})) {
1749: %{$spreadsheets{$cachekey}->{'row_numbers'}}=%{$self->{'row_numbers'}};
1.1 matthew 1750: }
1.57 albertel 1751: $spreadsheets{$cachekey}->{'maxrow'} = $self->{'maxrow'};
1.1 matthew 1752: }
1753:
1754: sub set_row_sources {
1755: my $self = shift;
1.54 albertel 1756: $self->check_formulas_loaded();
1.1 matthew 1757: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1.22 matthew 1758: next if ($cell !~ /^A(\d+)/ || $1 < 1);
1.1 matthew 1759: my $row = $1;
1760: $self->{'row_source'}->{$row} = $value;
1761: }
1762: return;
1763: }
1764:
1.12 matthew 1765: sub set_row_numbers {
1766: my $self = shift;
1.54 albertel 1767: $self->check_formulas_loaded();
1.12 matthew 1768: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1769: next if ($cell !~ /^A(\d+)$/);
1770: next if (! defined($value));
1771: $self->{'row_numbers'}->{$value} = $1;
1772: $self->{'maxrow'} = $1 if ($1 > $self->{'maxrow'});
1773: }
1774: }
1775:
1.1 matthew 1776: ##
1777: ## exportrow is *not* used to get the export row from a computed sub-sheet.
1778: ##
1779: sub exportrow {
1780: my $self = shift;
1.30 matthew 1781: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1782: return ();
1783: }
1.1 matthew 1784: my @exportarray;
1785: foreach my $column (@UC_Columns) {
1786: push(@exportarray,$self->value($column.'0'));
1787: }
1788: return @exportarray;
1789: }
1790:
1791: sub save {
1792: my $self = shift;
1793: my ($makedef)=@_;
1794: my $cid=$self->{'cid'};
1.4 matthew 1795: # If we are saving it, it must not be temporary
1796: $self->temporary(0);
1.1 matthew 1797: if (&Apache::lonnet::allowed('opa',$cid)) {
1798: my %f=$self->formulas();
1799: my $stype = $self->{'type'};
1800: my $cnum = $self->{'cnum'};
1801: my $cdom = $self->{'cdom'};
1.12 matthew 1802: my $filename = $self->{'filename'};
1.1 matthew 1803: # Cache new sheet
1.57 albertel 1804: $self->cache_sheet(\%f);
1.1 matthew 1805: # Write sheet
1806: foreach (keys(%f)) {
1807: delete($f{$_}) if ($f{$_} eq 'import');
1808: }
1.12 matthew 1809: my $reply = &Apache::lonnet::put($filename,\%f,$cdom,$cnum);
1.1 matthew 1810: return $reply if ($reply ne 'ok');
1811: $reply = &Apache::lonnet::put($stype.'_spreadsheets',
1.41 albertel 1812: {$filename => $env{'user.name'}.'@'.$env{'user.domain'}},
1.1 matthew 1813: $cdom,$cnum);
1814: return $reply if ($reply ne 'ok');
1815: if ($makedef) {
1816: $reply = &Apache::lonnet::put('environment',
1.12 matthew 1817: {'spreadsheet_default_'.$stype => $filename },
1.1 matthew 1818: $cdom,$cnum);
1819: return $reply if ($reply ne 'ok');
1.78 raeburn 1820: &Apache::lonnet::appenv({'course.'.$self->{'cid'}.'.spreadsheet_default_'.
1821: $self->{'type'} => $self->filename()});
1.1 matthew 1822: }
1.77 albertel 1823: if ($self->{'type'} eq 'studentcalc') {
1824: &Apache::lonnet::expirespread('','','studentcalc','');
1825: } elsif ($self->{'type'} eq 'assesscalc') {
1826: &Apache::lonnet::expirespread('','','assesscalc','');
1827: &Apache::lonnet::expirespread('','','studentcalc','');
1.1 matthew 1828: }
1829: return $reply;
1830: }
1831: return 'unauthorized';
1832: }
1833:
1834: } # end of scope for %spreadsheets
1835:
1836: sub save_tmp {
1837: my $self = shift;
1.41 albertel 1838: my $filename=$env{'user.name'}.'_'.
1839: $env{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1.1 matthew 1840: $self->{'filename'};
1.9 matthew 1841: $filename=~s/\W/\_/g;
1842: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1.4 matthew 1843: $self->temporary(1);
1.1 matthew 1844: my $fh;
1.9 matthew 1845: if ($fh=Apache::File->new('>'.$filename)) {
1.1 matthew 1846: my %f = $self->formulas();
1847: while( my ($cell,$formula) = each(%f)) {
1848: next if ($formula eq 'import');
1.69 www 1849: print $fh &escape($cell)."=".
1850: &escape($formula)."\n";
1.1 matthew 1851: }
1852: $fh->close();
1853: }
1854: }
1855:
1856: sub load_tmp {
1857: my $self = shift;
1.41 albertel 1858: my $filename=$env{'user.name'}.'_'.
1859: $env{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1.1 matthew 1860: $self->{'filename'};
1861: $filename=~s/\W/\_/g;
1862: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1863: my %formulas = ();
1864: if (my $spreadsheet_file = Apache::File->new($filename)) {
1865: while (<$spreadsheet_file>) {
1866: chomp;
1867: my ($cell,$formula) = split(/=/);
1.69 www 1868: $cell = &unescape($cell);
1869: $formula = &unescape($formula);
1.1 matthew 1870: $formulas{$cell} = $formula;
1871: }
1872: $spreadsheet_file->close();
1873: }
1.4 matthew 1874: # flag the sheet as temporary
1875: $self->temporary(1);
1.1 matthew 1876: $self->formulas(\%formulas);
1877: $self->set_row_sources();
1878: $self->set_row_numbers();
1879: return;
1.4 matthew 1880: }
1881:
1882: sub temporary {
1883: my $self=shift;
1884: if (@_) {
1885: ($self->{'temporary'})= @_;
1886: }
1887: return $self->{'temporary'};
1.1 matthew 1888: }
1889:
1890: sub modify_cell {
1891: # studentcalc overrides this
1892: my $self = shift;
1893: my ($cell,$formula) = @_;
1894: if ($cell =~ /([A-z])\-/) {
1895: $cell = 'template_'.$1;
1896: } elsif ($cell !~ /^([A-z](\d+)|template_[A-z])$/) {
1897: return;
1898: }
1899: $self->set_formula($cell,$formula);
1900: $self->rebuild_stats();
1901: return;
1902: }
1903:
1904: ###########################################
1905: # othersheets: Returns the list of other spreadsheets available
1906: ###########################################
1907: sub othersheets {
1908: my $self = shift();
1909: my ($stype) = @_;
1910: $stype = $self->{'type'} if (! defined($stype) || $stype !~ /calc$/);
1911: #
1.71 albertel 1912: my @alternatives=(&mt('Default'), &mt('LON-CAPA Standard'));
1.1 matthew 1913: my %results=&Apache::lonnet::dump($stype.'_spreadsheets',
1914: $self->{'cdom'}, $self->{'cnum'});
1915: my ($tmp) = keys(%results);
1.71 albertel 1916: if (%results
1.72 albertel 1917: && $tmp !~ /^(con_lost|error|no_such_host)/i ) {
1.71 albertel 1918: push(@alternatives, sort(keys(%results)));
1.1 matthew 1919: }
1920: return @alternatives;
1.3 matthew 1921: }
1922:
1923: sub blackout {
1924: my $self = shift;
1925: $self->{'blackout'} = $_[0] if (@_);
1926: return $self->{'blackout'};
1.1 matthew 1927: }
1928:
1929: sub get_row {
1930: my $self = shift;
1931: my ($n)=@_;
1932: my @cols=();
1933: foreach my $col (@UC_Columns,@LC_Columns) {
1934: my $cell = $col.$n;
1935: push(@cols,{ name => $cell,
1936: formula => $self->formula($cell),
1937: value => $self->value($cell)});
1938: }
1939: return @cols;
1940: }
1941:
1942: sub get_template_row {
1943: my $self = shift;
1944: my @cols=();
1945: foreach my $col (@UC_Columns,@LC_Columns) {
1946: my $cell = 'template_'.$col;
1947: push(@cols,{ name => $cell,
1948: formula => $self->formula($cell),
1949: value => $self->formula($cell) });
1950: }
1951: return @cols;
1952: }
1953:
1.12 matthew 1954: sub need_to_save {
1.1 matthew 1955: my $self = shift;
1.12 matthew 1956: if ($self->{'new_rows'} && ! $self->temporary()) {
1957: return 1;
1.1 matthew 1958: }
1.12 matthew 1959: return 0;
1.1 matthew 1960: }
1961:
1962: sub get_row_number_from_key {
1963: my $self = shift;
1964: my ($key) = @_;
1965: if (! exists($self->{'row_numbers'}->{$key}) ||
1966: ! defined($self->{'row_numbers'}->{$key})) {
1967: # I used to set $f here to the new value, but the key passed for lookup
1968: # may not be the key we need to save
1969: $self->{'maxrow'}++;
1970: $self->{'row_numbers'}->{$key} = $self->{'maxrow'};
1.13 matthew 1971: # $self->logthis('added row '.$self->{'row_numbers'}->{$key}.
1972: # ' for '.$key);
1.12 matthew 1973: $self->{'new_rows'} = 1;
1.1 matthew 1974: }
1975: return $self->{'row_numbers'}->{$key};
1976: }
1977:
1978: 1;
1979:
1980: __END__
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