1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.505.2.5 2011/05/27 19:29:21 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: =pod
41:
42: =head1 NAME
43:
44: Apache::lonxml
45:
46: =head1 SYNOPSIS
47:
48: XML Parsing Module
49:
50: This is part of the LearningOnline Network with CAPA project
51: described at http://www.lon-capa.org.
52:
53:
54: =head1 SUBROUTINES
55:
56: =cut
57:
58:
59:
60: package Apache::lonxml;
61: use vars
62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
63: use strict;
64: use LONCAPA;
65: use HTML::LCParser();
66: use HTML::TreeBuilder();
67: use HTML::Entities();
68: use Safe();
69: use Safe::Hole();
70: use Math::Cephes();
71: use Math::Random();
72: use Opcode();
73: use POSIX qw(strftime);
74: use Time::HiRes qw( gettimeofday tv_interval );
75: use Symbol();
76:
77: sub register {
78: my ($space,@taglist) = @_;
79: foreach my $temptag (@taglist) {
80: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
81: }
82: }
83:
84: sub deregister {
85: my ($space,@taglist) = @_;
86: foreach my $temptag (@taglist) {
87: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
88: if ($tempspace eq $space) {
89: pop(@{ $Apache::lonxml::alltags{$temptag} });
90: }
91: }
92: #&printalltags();
93: }
94:
95: use Apache::Constants qw(:common);
96: use Apache::lontexconvert();
97: use Apache::style();
98: use Apache::run();
99: use Apache::londefdef();
100: use Apache::scripttag();
101: use Apache::languagetags();
102: use Apache::edit();
103: use Apache::inputtags();
104: use Apache::outputtags();
105: use Apache::lonnet;
106: use Apache::File();
107: use Apache::loncommon();
108: use Apache::lonfeedback();
109: use Apache::lonmsg();
110: use Apache::loncacc();
111: use Apache::lonmaxima();
112: use Apache::lonr();
113: use Apache::lonlocal;
114: use Apache::lonhtmlcommon();
115:
116: #==================================== Main subroutine: xmlparse
117:
118: #debugging control, to turn on debugging modify the correct handler
119:
120: $Apache::lonxml::debug=0;
121:
122: # keeps count of the number of warnings and errors generated in a parse
123: $warningcount=0;
124: $errorcount=0;
125:
126: #path to the directory containing the file currently being processed
127: @pwd=();
128:
129: #these two are used for capturing a subset of the output for later processing,
130: #don't touch them directly use &startredirection and &endredirection
131: @outputstack = ();
132: $redirection = 0;
133:
134: #controls wheter the <import> tag actually does
135: $import = 1;
136: @extlinks=();
137:
138: # meta mode is a bit weird only some output is to be turned off
139: #<output> tag turns metamode off (defined in londefdef.pm)
140: $metamode = 0;
141:
142: # turns on and of run::evaluate actually derefencing var refs
143: $evaluate = 1;
144:
145: # data structure for eidt mode, determines what tags can go into what other tags
146: %insertlist=();
147:
148: # stores the list of active tag namespaces
149: @namespace=();
150:
151: # stores all Scrit Vars displays for later showing
152: my @script_var_displays=();
153:
154: # a pointer the the Apache request object
155: $Apache::lonxml::request='';
156:
157: # a problem number counter, and check on ether it is used
158: $Apache::lonxml::counter=1;
159: $Apache::lonxml::counter_changed=0;
160:
161: # Part counter hash. In analysis mode, the
162: # problems can use this to record which parts increment the counter
163: # by how much. The counter subs will maintain this hash via
164: # their optional part parameters. Note that the assumption is that
165: # analysis is done in one request and therefore it is not necessary to
166: # save this information request-to-request.
167:
168:
169: %Apache::lonxml::counters_per_part = ();
170:
171: #internal check on whether to look at style defs
172: $Apache::lonxml::usestyle=1;
173:
174: #locations used to store the parameter string for style substitutions
175: $Apache::lonxml::style_values='';
176: $Apache::lonxml::style_end_values='';
177:
178: #array of ssi calls that need to occur after we are done parsing
179: @Apache::lonxml::ssi_info=();
180:
181: #should we do the postag variable interpolation
182: $Apache::lonxml::post_evaluate=1;
183:
184: #a header message to emit in the case of any generated warning or errors
185: $Apache::lonxml::warnings_error_header='';
186:
187: # Control whether or not LaTeX symbols should be substituted for their
188: # \ style equivalents...this may be turned off e.g. in an verbatim
189: # environment.
190:
191: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
192:
193: sub enable_LaTeX_substitutions {
194: $Apache::lonxml::substitute_LaTeX_symbols = 1;
195: }
196: sub disable_LaTeX_substitutions {
197: $Apache::lonxml::substitute_LaTeX_symbols = 0;
198: }
199:
200: sub xmlend {
201: my ($target,$parser)=@_;
202: my $mode='xml';
203: my $status='OPEN';
204: if ($Apache::lonhomework::parsing_a_problem ||
205: $Apache::lonhomework::parsing_a_task ) {
206: $mode='problem';
207: $status=$Apache::inputtags::status[-1];
208: }
209: my $discussion;
210: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
211: ['LONCAPA_INTERNAL_no_discussion']);
212: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
213: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
214: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
215: }
216: if ($target eq 'tex') {
217: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
218: &Apache::lonxml::newparser($parser,\$discussion,'');
219: return '';
220: }
221:
222: return $discussion;
223: }
224:
225: sub tokeninputfield {
226: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
227: $defhost=~tr/a-z/A-Z/;
228: return (<<ENDINPUTFIELD)
229: <script type="text/javascript">
230: function updatetoken() {
231: var comp=new Array;
232: var barcode=unescape(document.tokeninput.barcode.value);
233: comp=barcode.split('*');
234: if (typeof(comp[0])!="undefined") {
235: document.tokeninput.codeone.value=comp[0];
236: }
237: if (typeof(comp[1])!="undefined") {
238: document.tokeninput.codetwo.value=comp[1];
239: }
240: if (typeof(comp[2])!="undefined") {
241: comp[2]=comp[2].toUpperCase();
242: document.tokeninput.codethree.value=comp[2];
243: }
244: document.tokeninput.barcode.value='';
245: }
246: </script>
247: <form method="post" name="tokeninput" action="">
248: <table border="2" bgcolor="#FFFFBB">
249: <tr><th>DocID Checkin</th></tr>
250: <tr><td>
251: <table>
252: <tr>
253: <td>Scan in Barcode</td>
254: <td><input type="text" size="22" name="barcode"
255: onchange="updatetoken()"/></td>
256: </tr>
257: <tr><td><i>or</i> Type in DocID</td>
258: <td>
259: <input type="text" size="5" name="codeone" />
260: <b><font size="+2">*</font></b>
261: <input type="text" size="5" name="codetwo" />
262: <b><font size="+2">*</font></b>
263: <input type="text" size="10" name="codethree" value="$defhost"
264: onchange="this.value=this.value.toUpperCase()" />
265: </td></tr>
266: </table>
267: </td></tr>
268: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
269: </table>
270: </form>
271: ENDINPUTFIELD
272: }
273:
274: sub maketoken {
275: my ($symb,$tuname,$tudom,$tcrsid)=@_;
276: unless ($symb) {
277: $symb=&Apache::lonnet::symbread();
278: }
279: unless ($tuname) {
280: $tuname=$env{'user.name'};
281: $tudom=$env{'user.domain'};
282: $tcrsid=$env{'request.course.id'};
283: }
284:
285: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
286: }
287:
288: sub printtokenheader {
289: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
290: unless ($token) { return ''; }
291:
292: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
293: unless ($tsymb) {
294: $tsymb=$symb;
295: }
296: unless ($tuname) {
297: $tuname=$name;
298: $tudom=$domain;
299: $tcrsid=$courseid;
300: }
301:
302: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
303:
304: if ($target eq 'web') {
305: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
306: return
307: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
308: &mt('Checked out for').' '.$plainname.
309: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
310: '<br />'.&mt('ID').': '.$idhash{$tuname}.
311: '<br />'.&mt('CourseID').': '.$tcrsid.
312: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
313: '<br />'.&mt('DocID').': '.$token.
314: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
315: } else {
316: return $token;
317: }
318: }
319:
320: sub printalltags {
321: my $temp;
322: foreach $temp (sort keys %Apache::lonxml::alltags) {
323: &Apache::lonxml::debug("$temp -- ".
324: join(',',@{ $Apache::lonxml::alltags{$temp} }));
325: }
326: }
327:
328: sub xmlparse {
329: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
330:
331: &setup_globals($request,$target);
332: &Apache::inputtags::initialize_inputtags();
333: &Apache::bridgetask::initialize_bridgetask();
334: &Apache::outputtags::initialize_outputtags();
335: &Apache::edit::initialize_edit();
336: &Apache::londefdef::initialize_londefdef();
337:
338: #
339: # do we have a course style file?
340: #
341:
342: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
343: my $bodytext=
344: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
345: if ($bodytext) {
346: foreach my $file (split(',',$bodytext)) {
347: my $location=&Apache::lonnet::filelocation('',$file);
348: my $styletext=&Apache::lonnet::getfile($location);
349: if ($styletext ne '-1') {
350: %style_for_target = (%style_for_target,
351: &Apache::style::styleparser($target,$styletext));
352: }
353: }
354: }
355: } elsif ($env{'construct.style'}
356: && ($env{'request.state'} eq 'construct')) {
357: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
358: my $styletext=&Apache::lonnet::getfile($location);
359: if ($styletext ne '-1') {
360: %style_for_target = (%style_for_target,
361: &Apache::style::styleparser($target,$styletext));
362: }
363: }
364: #&printalltags();
365: my @pars = ();
366: my $pwd=$env{'request.filename'};
367: $pwd =~ s:/[^/]*$::;
368: &newparser(\@pars,\$content_file_string,$pwd);
369:
370: my $safeeval = new Safe;
371: my $safehole = new Safe::Hole;
372: &init_safespace($target,$safeeval,$safehole,$safeinit);
373: #-------------------- Redefinition of the target in the case of compound target
374:
375: ($target, my @tenta) = split('&&',$target);
376:
377: my @stack = ();
378: my @parstack = ();
379: &initdepth();
380: &init_alarm();
381: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
382: $safeeval,\%style_for_target,1);
383:
384: if (@stack) {
385: &warning(&mt('At end of file some tags were still left unclosed:').
386: ' <tt><'.join('></tt>, <tt><',reverse(@stack)).
387: '></tt>');
388: }
389: if ($env{'request.uri'}) {
390: &writeallows($env{'request.uri'});
391: }
392: &do_registered_ssi();
393: if ($Apache::lonxml::counter_changed) { &store_counter() }
394:
395: &clean_safespace($safeeval);
396:
397: if (@script_var_displays) {
398: $finaloutput .= join('',@script_var_displays);
399: undef(@script_var_displays);
400: }
401: &init_state();
402: if ($env{'form.return_only_error_and_warning_counts'}) {
403: if ($env{'request.filename'}=~/\.(html|htm|xml)$/i) {
404: my $error=&verify_html($content_file_string);
405: if ($error) { $errorcount++; }
406: }
407: return "$errorcount:$warningcount";
408: }
409: return $finaloutput;
410: }
411:
412: sub latex_special_symbols {
413: my ($string,$where)=@_;
414: #
415: # If e.g. in verbatim mode, then don't substitute.
416: # but return original string.
417: #
418: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
419: return $string;
420: }
421: if ($where eq 'header') {
422: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
423: $string =~ s/(\$|%|\{|\})/\\$1/g;
424: $string=&Apache::lonprintout::character_chart($string);
425: # any & or # leftover should be safe to just escape
426: $string=~s/([^\\])\&/$1\\\&/g;
427: $string=~s/([^\\])\#/$1\\\#/g;
428: $string =~ s/_/\\_/g; # _ -> \_
429: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
430: } else {
431: $string=~s/\\/\\ensuremath{\\backslash}/g;
432: $string=~s/\\\%|\%/\\\%/g;
433: $string=~s/\\{|{/\\{/g;
434: $string=~s/\\}|}/\\}/g;
435: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
436: $string=~s/\\\$|\$/\\\$/g;
437: $string=~s/\\\_|\_/\\\_/g;
438: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
439: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
440: $string=&Apache::lonprintout::character_chart($string);
441: # any & or # leftover should be safe to just escape
442: $string=~s/\\\&|\&/\\\&/g;
443: $string=~s/\\\#|\#/\\\#/g;
444: $string=~s/\|/\$\\mid\$/g;
445: #single { or } How to escape?
446: }
447: return $string;
448: }
449:
450: sub inner_xmlparse {
451: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
452: my $finaloutput = '';
453: my $result;
454: my $token;
455: my $dontpop=0;
456: my $startredirection = $Apache::lonxml::redirection;
457: while ( $#$pars > -1 ) {
458: while ($token = $$pars['-1']->get_token) {
459: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
460: if ($metamode<1) {
461: my $text=$token->[1];
462: if ($token->[0] eq 'C' && $target eq 'tex') {
463: $text = '';
464: # $text = '%'.$text."\n";
465: }
466: $result.=$text;
467: }
468: } elsif (($token->[0] eq 'D')) {
469: if ($metamode<1 && $target eq 'web') {
470: my $text=$token->[1];
471: $result.=$text;
472: }
473: } elsif ($token->[0] eq 'PI') {
474: if ($metamode<1 && $target eq 'web') {
475: $result=$token->[2];
476: }
477: } elsif ($token->[0] eq 'S') {
478: # add tag to stack
479: push (@$stack,$token->[1]);
480: # add parameters list to another stack
481: push (@$parstack,&parstring($token));
482: &increasedepth($token);
483: if ($Apache::lonxml::usestyle &&
484: exists($$style_for_target{$token->[1]})) {
485: $Apache::lonxml::usestyle=0;
486: my $string=$$style_for_target{$token->[1]}.
487: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
488: &Apache::lonxml::newparser($pars,\$string);
489: $Apache::lonxml::style_values=$$parstack[-1];
490: $Apache::lonxml::style_end_values=$$parstack[-1];
491: } else {
492: $result = &callsub("start_$token->[1]", $target, $token, $stack,
493: $parstack, $pars, $safeeval, $style_for_target);
494: }
495: } elsif ($token->[0] eq 'E') {
496: if ($Apache::lonxml::usestyle &&
497: exists($$style_for_target{'/'."$token->[1]"})) {
498: $Apache::lonxml::usestyle=0;
499: my $string=$$style_for_target{'/'.$token->[1]}.
500: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
501: &Apache::lonxml::newparser($pars,\$string);
502: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
503: $Apache::lonxml::style_end_values='';
504: $dontpop=1;
505: } else {
506: #clear out any tags that didn't end
507: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
508: my $lasttag=$$stack[-1];
509: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
510: &Apache::lonxml::warning(&mt('Using tag [_1] on line [_2] as end tag to [_3]','</'.$token->[1].'>','.$token->[3].','<'.$$stack[-1].'>'));
511: last;
512: } else {
513: &Apache::lonxml::warning(&mt('Found tag [_1] on line [_2] when looking for [_3] in file.','</'.$token->[1].'>',$token->[3],'</'.$$stack[-1].'>'));
514: &end_tag($stack,$parstack,$token);
515: }
516: }
517: $result = &callsub("end_$token->[1]", $target, $token, $stack,
518: $parstack, $pars,$safeeval, $style_for_target);
519: }
520: } else {
521: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
522: }
523: #evaluate variable refs in result
524: if ($Apache::lonxml::post_evaluate &&$result ne "") {
525: my $extras;
526: if (!$Apache::lonxml::usestyle) {
527: $extras=$Apache::lonxml::style_values;
528: }
529: if ( $#$parstack > -1 ) {
530: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
531: } else {
532: $result= &Apache::run::evaluate($result,$safeeval,$extras);
533: }
534: }
535: $Apache::lonxml::post_evaluate=1;
536:
537: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
538: #Style file definitions should be correct
539: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
540: $result=&latex_special_symbols($result);
541: }
542: }
543:
544: if ($Apache::lonxml::redirection) {
545: $Apache::lonxml::outputstack['-1'] .= $result;
546: } else {
547: $finaloutput.=$result;
548: }
549: $result = '';
550:
551: if ($token->[0] eq 'E' && !$dontpop) {
552: &end_tag($stack,$parstack,$token);
553: }
554: $dontpop=0;
555: }
556: if ($#$pars > -1) {
557: pop @$pars;
558: pop @Apache::lonxml::pwd;
559: }
560: }
561:
562: # if ($target eq 'meta') {
563: # $finaloutput.=&endredirection;
564: # }
565:
566: if ( $start && $target eq 'grade') { &endredirection(); }
567: if ( $Apache::lonxml::redirection > $startredirection) {
568: while ($Apache::lonxml::redirection > $startredirection) {
569: $finaloutput .= &endredirection();
570: }
571: }
572: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
573: $finaloutput=&afterburn($finaloutput);
574: }
575: if ($target eq 'modified') {
576: # if modfied, handle startpart and endpart
577: $finaloutput=~s/\<startpartmarker[^\>]*\>(.*)\<endpartmarker[^\>]*\>/<part>$1<\/part>/gs;
578: }
579: return $finaloutput;
580: }
581:
582: ##
583: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
584: ## otherwise do not call it as we do not know what it is.
585: ##
586: sub callsub {
587: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
588: my $currentstring='';
589: my $nodefault;
590: {
591: my $sub1;
592: no strict 'refs';
593: my $tag=$token->[1];
594: # get utterly rid of extended html tags
595: if ($tag=~/^x\-/i) { return ''; }
596: my $space=$Apache::lonxml::alltags{$tag}[-1];
597: if (!$space) {
598: $tag=~tr/A-Z/a-z/;
599: $sub=~tr/A-Z/a-z/;
600: $space=$Apache::lonxml::alltags{$tag}[-1]
601: }
602:
603: my $deleted=0;
604: if (($token->[0] eq 'S') && ($target eq 'modified')) {
605: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
606: $parstack,$parser,$safeeval,
607: $style);
608: }
609: if (!$deleted) {
610: if ($space) {
611: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
612: $sub1="$space\:\:$sub";
613: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
614: $parstack,$parser,$safeeval,
615: $style);
616: } else {
617: if ($target eq 'tex') {
618: # throw away tag name
619: return '';
620: }
621: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
622: if ($metamode <1) {
623: if (defined($token->[4]) && ($metamode < 1)) {
624: $currentstring = $token->[4];
625: } else {
626: $currentstring = $token->[2];
627: }
628: }
629: }
630: # &Apache::lonxml::debug("nodefalt:$nodefault:");
631: if ($currentstring eq '' && $nodefault eq '') {
632: if ($target eq 'edit') {
633: #&Apache::lonxml::debug("doing default edit for $token->[1]");
634: if ($token->[0] eq 'S') {
635: $currentstring = &Apache::edit::tag_start($target,$token);
636: } elsif ($token->[0] eq 'E') {
637: $currentstring = &Apache::edit::tag_end($target,$token);
638: }
639: }
640: }
641: if ($target eq 'modified' && $nodefault eq '') {
642: if ($currentstring eq '') {
643: if ($token->[0] eq 'S') {
644: $currentstring = $token->[4];
645: } elsif ($token->[0] eq 'E') {
646: $currentstring = $token->[2];
647: } else {
648: $currentstring = $token->[2];
649: }
650: }
651: if ($token->[0] eq 'S') {
652: $currentstring.=&Apache::edit::handle_insert();
653: } elsif ($token->[0] eq 'E') {
654: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
655: }
656: }
657: }
658: use strict 'refs';
659: }
660: return $currentstring;
661: }
662:
663: {
664: my %state;
665:
666: sub init_state {
667: undef(%state);
668: }
669:
670: sub set_state {
671: my ($key,$value) = @_;
672: $state{$key} = $value;
673: return $value;
674: }
675: sub get_state {
676: my ($key) = @_;
677: return $state{$key};
678: }
679: }
680:
681: sub setup_globals {
682: my ($request,$target)=@_;
683: $Apache::lonxml::request=$request;
684: $errorcount=0;
685: $warningcount=0;
686: $Apache::lonxml::internal_error=0;
687: $Apache::lonxml::default_homework_loaded=0;
688: $Apache::lonxml::usestyle=1;
689: &init_counter();
690: &clear_bubble_lines_for_part();
691: &init_state();
692: &set_state('target',$target);
693: @Apache::lonxml::pwd=();
694: @Apache::lonxml::extlinks=();
695: @script_var_displays=();
696: @Apache::lonxml::ssi_info=();
697: $Apache::lonxml::post_evaluate=1;
698: $Apache::lonxml::warnings_error_header='';
699: $Apache::lonxml::substitute_LaTeX_symbols = 1;
700: if ($target eq 'meta') {
701: $Apache::lonxml::redirection = 0;
702: $Apache::lonxml::metamode = 1;
703: $Apache::lonxml::evaluate = 1;
704: $Apache::lonxml::import = 0;
705: } elsif ($target eq 'answer') {
706: $Apache::lonxml::redirection = 0;
707: $Apache::lonxml::metamode = 1;
708: $Apache::lonxml::evaluate = 1;
709: $Apache::lonxml::import = 1;
710: } elsif ($target eq 'grade') {
711: &startredirection(); #ended in inner_xmlparse on exit
712: $Apache::lonxml::metamode = 0;
713: $Apache::lonxml::evaluate = 1;
714: $Apache::lonxml::import = 1;
715: } elsif ($target eq 'modified') {
716: $Apache::lonxml::redirection = 0;
717: $Apache::lonxml::metamode = 0;
718: $Apache::lonxml::evaluate = 0;
719: $Apache::lonxml::import = 0;
720: } elsif ($target eq 'edit') {
721: $Apache::lonxml::redirection = 0;
722: $Apache::lonxml::metamode = 0;
723: $Apache::lonxml::evaluate = 0;
724: $Apache::lonxml::import = 0;
725: } elsif ($target eq 'analyze') {
726: $Apache::lonxml::redirection = 0;
727: $Apache::lonxml::metamode = 0;
728: $Apache::lonxml::evaluate = 1;
729: $Apache::lonxml::import = 1;
730: } else {
731: $Apache::lonxml::redirection = 0;
732: $Apache::lonxml::metamode = 0;
733: $Apache::lonxml::evaluate = 1;
734: $Apache::lonxml::import = 1;
735: }
736: }
737:
738: sub init_safespace {
739: my ($target,$safeeval,$safehole,$safeinit) = @_;
740: $safeeval->deny_only(':dangerous');
741: $safeeval->reval('use Math::Complex;');
742: $safeeval->permit_only(":default");
743: $safeeval->permit("entereval");
744: $safeeval->permit(":base_math");
745: $safeeval->permit("sort");
746: $safeeval->permit("time");
747: $safeeval->permit("caller");
748: $safeeval->deny("rand");
749: $safeeval->deny("srand");
750: $safeeval->deny(":base_io");
751: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
752: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
753: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
754: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
755: '&chem_standard_order');
756: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
757: $safehole->wrap(\&Apache::response::implicit_multiplication,$safeeval,'&implicit_multiplication');
758:
759: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
760: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
761: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
762: '&maxima_cas_formula_fix');
763:
764: $safehole->wrap(\&Apache::lonr::r_eval,$safeeval,'&r_eval');
765: $safehole->wrap(\&Apache::lonr::Rentry,$safeeval,'&Rentry');
766: $safehole->wrap(\&Apache::lonr::Rarray,$safeeval,'&Rarray');
767: $safehole->wrap(\&Apache::lonr::r_check,$safeeval,'&r_check');
768: $safehole->wrap(\&Apache::lonr::r_cas_formula_fix,$safeeval,
769: '&r_cas_formula_fix');
770:
771: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
772: '&capa_formula_fix');
773:
774: $safehole->wrap(\&Apache::lonlocal::locallocaltime,$safeeval,
775: '&locallocaltime');
776:
777: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
778: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
779: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
780: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
781: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
782: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
783: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
784: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
785: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
786: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
787: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
788: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
789: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
790: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
791: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
792: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
793: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
794: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
795: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
796:
797: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
798: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
799: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
800: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
801: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
802: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
803: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
804: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
805: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
806: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
807: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
808: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
809: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
810: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
811: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
812: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
813: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
814: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
815: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
816: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
817: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
818: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
819:
820: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
821: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
822: '&Math::Cephes::Matrix::new');
823: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
824: '&Math::Cephes::Matrix::coef');
825: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
826: '&Math::Cephes::Matrix::clr');
827: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
828: '&Math::Cephes::Matrix::add');
829: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
830: '&Math::Cephes::Matrix::sub');
831: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
832: '&Math::Cephes::Matrix::mul');
833: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
834: '&Math::Cephes::Matrix::div');
835: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
836: '&Math::Cephes::Matrix::inv');
837: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
838: '&Math::Cephes::Matrix::transp');
839: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
840: '&Math::Cephes::Matrix::simq');
841: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
842: '&Math::Cephes::Matrix::mat_to_vec');
843: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
844: '&Math::Cephes::Matrix::vec_to_mat');
845: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
846: '&Math::Cephes::Matrix::check');
847: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
848: '&Math::Cephes::Matrix::check');
849:
850: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
851: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
852: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
853: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
854: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
855: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
856:
857: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
858: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
859: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
860: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
861: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
862: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
863: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
864: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
865: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
866: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
867: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
868: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
869: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
870: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
871: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
872: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
873: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
874: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
875: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
876: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
877: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
878: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
879: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
880: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
881: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
882: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
883: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
884: # use Data::Dumper;
885: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
886: #need to inspect this class of ops
887: # $safeeval->deny(":base_orig");
888: $safeeval->permit("require");
889: $safeinit .= ';$external::target="'.$target.'";';
890: &Apache::run::run($safeinit,$safeeval);
891: &initialize_rndseed($safeeval);
892: }
893:
894: sub clean_safespace {
895: my ($safeeval) = @_;
896: delete_package_recurse($safeeval->{Root});
897: }
898:
899: sub delete_package_recurse {
900: my ($package) = @_;
901: my @subp;
902: {
903: no strict 'refs';
904: while (my ($key,$val) = each(%{*{"$package\::"}})) {
905: if (!defined($val)) { next; }
906: local (*ENTRY) = $val;
907: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
908: $key ne "main::" && $key ne "<none>::")
909: {
910: my ($p) = $package ne "main" ? "$package\::" : "";
911: ($p .= $key) =~ s/::$//;
912: push(@subp,$p);
913: }
914: }
915: }
916: foreach my $p (@subp) {
917: delete_package_recurse($p);
918: }
919: Symbol::delete_package($package);
920: }
921:
922: sub initialize_rndseed {
923: my ($safeeval)=@_;
924: my $rndseed;
925: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
926: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
927: my $safeinit = '$external::randomseed="'.$rndseed.'";';
928: &Apache::lonxml::debug("Setting rndseed to $rndseed");
929: &Apache::run::run($safeinit,$safeeval);
930: }
931:
932: sub default_homework_load {
933: my ($safeeval)=@_;
934: &Apache::lonxml::debug('Loading default_homework');
935: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
936: if ($default eq -1) {
937: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
938: } else {
939: &Apache::run::run($default,$safeeval);
940: $Apache::lonxml::default_homework_loaded=1;
941: }
942: }
943:
944: {
945: my $alarm_depth;
946: sub init_alarm {
947: alarm(0);
948: $alarm_depth=0;
949: }
950:
951: sub start_alarm {
952: if ($alarm_depth<1) {
953: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
954: if ($old) {
955: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
956: }
957: }
958: $alarm_depth++;
959: }
960:
961: sub end_alarm {
962: $alarm_depth--;
963: if ($alarm_depth<1) { alarm(0); }
964: }
965: }
966: my $metamode_was;
967: sub startredirection {
968: if (!$Apache::lonxml::redirection) {
969: $metamode_was=$Apache::lonxml::metamode;
970: }
971: $Apache::lonxml::metamode=0;
972: $Apache::lonxml::redirection++;
973: push (@Apache::lonxml::outputstack, '');
974: }
975:
976: sub endredirection {
977: if (!$Apache::lonxml::redirection) {
978: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
979: return '';
980: }
981: $Apache::lonxml::redirection--;
982: if (!$Apache::lonxml::redirection) {
983: $Apache::lonxml::metamode=$metamode_was;
984: }
985: pop @Apache::lonxml::outputstack;
986: }
987: sub in_redirection {
988: return ($Apache::lonxml::redirection > 0)
989: }
990:
991: sub end_tag {
992: my ($tagstack,$parstack,$token)=@_;
993: pop(@$tagstack);
994: pop(@$parstack);
995: &decreasedepth($token);
996: }
997:
998: sub initdepth {
999: @Apache::lonxml::depthcounter=();
1000: undef($Apache::lonxml::last_depth_count);
1001: }
1002:
1003:
1004: my @timers;
1005: my $lasttime;
1006: # @Apache::lonxml::depthcounter -> count of tags that exist so
1007: # far at each level
1008: # $Apache::lonxml::last_depth_count -> when ascending, need to
1009: # remember the count for the level below the current level (for
1010: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
1011:
1012: sub increasedepth {
1013: my ($token) = @_;
1014: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
1015: undef($Apache::lonxml::last_depth_count);
1016: my $time;
1017: if ($Apache::lonxml::debug eq "1") {
1018: push(@timers,[&gettimeofday()]);
1019: $time=&tv_interval($lasttime);
1020: $lasttime=[&gettimeofday()];
1021: }
1022: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1023: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
1024: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
1025: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1026: }
1027:
1028: sub decreasedepth {
1029: my ($token) = @_;
1030: if ( $#Apache::lonxml::depthcounter == -1) {
1031: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1032: }
1033: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
1034:
1035: my ($timer,$time);
1036: if ($Apache::lonxml::debug eq "1") {
1037: $timer=pop(@timers);
1038: $time=&tv_interval($lasttime);
1039: $lasttime=[&gettimeofday()];
1040: }
1041: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1042: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
1043: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
1044: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1045: }
1046:
1047: sub get_id {
1048: my ($parstack,$safeeval)=@_;
1049: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1050: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
1051: &error(&mt('ID [_1] contains invalid characters. IDs are only allowed to contain letters, numbers, spaces and -','"<tt>'.$id.'</tt>"'));
1052: }
1053: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1054: return $id;
1055: }
1056:
1057: sub get_all_text_unbalanced {
1058: #there is a copy of this in lonpublisher.pm
1059: my($tag,$pars)= @_;
1060: my $token;
1061: my $result='';
1062: $tag='<'.$tag.'>';
1063: while ($token = $$pars[-1]->get_token) {
1064: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1065: if ($token->[0] eq 'T' && $token->[2]) {
1066: $result.='<![CDATA['.$token->[1].']]>';
1067: } else {
1068: $result.=$token->[1];
1069: }
1070: } elsif ($token->[0] eq 'PI') {
1071: $result.=$token->[2];
1072: } elsif ($token->[0] eq 'S') {
1073: $result.=$token->[4];
1074: } elsif ($token->[0] eq 'E') {
1075: $result.=$token->[2];
1076: }
1077: if ($result =~ /\Q$tag\E/is) {
1078: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1079: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1080: #&Apache::lonxml::debug('Result is :'.$1);
1081: $redo=$tag.$redo;
1082: &Apache::lonxml::newparser($pars,\$redo);
1083: last;
1084: }
1085: }
1086: return $result
1087:
1088: }
1089:
1090: #########################################################################
1091: # #
1092: # bubble line counter management #
1093: # #
1094: #########################################################################
1095:
1096: =pod
1097:
1098: For bubble grading mode and exam bubble printing mode, the tracking of
1099: the current 'bubble line number' is stored in the %env element
1100: 'form.counter', and is modifed and handled by the following routines.
1101:
1102: The value of it is stored in $Apache:lonxml::counter when live and
1103: stored back to env after done.
1104:
1105: =item &increment_counter($increment);
1106:
1107: Increments the internal counter environment variable a specified amount
1108:
1109: Optional Arguments:
1110: $increment - amount to increment by (defaults to 1)
1111: Also 1 if the value is negative or zero.
1112: $part_response - A concatenation of the part and response id
1113: identifying exactly what is being 'answered'.
1114:
1115:
1116: =cut
1117:
1118: sub increment_counter {
1119: my ($increment, $part_response) = @_;
1120: if ($env{'form.grade_noincrement'}) { return; }
1121: if (!defined($increment) || $increment le 0) {
1122: $increment = 1;
1123: }
1124: $Apache::lonxml::counter += $increment;
1125:
1126: # If the caller supplied the response_id parameter,
1127: # Maintain its counter.. creating if necessary.
1128:
1129: if (defined($part_response)) {
1130: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1131: $Apache::lonxml::counters_per_part{$part_response} = 0;
1132: }
1133: $Apache::lonxml::counters_per_part{$part_response} += $increment;
1134: my $new_value = $Apache::lonxml::counters_per_part{$part_response};
1135: }
1136:
1137: $Apache::lonxml::counter_changed=1;
1138: }
1139:
1140: =pod
1141:
1142: =item &init_counter($increment);
1143:
1144: Initialize the internal counter environment variable
1145:
1146: =cut
1147:
1148: sub init_counter {
1149: if ($env{'request.state'} eq 'construct') {
1150: $Apache::lonxml::counter=1;
1151: $Apache::lonxml::counter_changed=1;
1152: } elsif (defined($env{'form.counter'})) {
1153: $Apache::lonxml::counter=$env{'form.counter'};
1154: $Apache::lonxml::counter_changed=0;
1155: } else {
1156: $Apache::lonxml::counter=1;
1157: $Apache::lonxml::counter_changed=1;
1158: }
1159: }
1160:
1161: sub store_counter {
1162: &Apache::lonnet::appenv({'form.counter' => $Apache::lonxml::counter});
1163: $Apache::lonxml::counter_changed=0;
1164: return '';
1165: }
1166:
1167: {
1168: my $state;
1169: sub clear_problem_counter {
1170: undef($state);
1171: &Apache::lonnet::delenv('form.counter');
1172: &Apache::lonxml::init_counter();
1173: &Apache::lonxml::store_counter();
1174: }
1175:
1176: sub remember_problem_counter {
1177: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1178: $state = $env{'form.counter'};
1179: }
1180:
1181: sub restore_problem_counter {
1182: if (defined($state)) {
1183: &Apache::lonnet::appenv({'form.counter' => $state});
1184: }
1185: }
1186: sub get_problem_counter {
1187: if ($Apache::lonxml::counter_changed) { &store_counter() }
1188: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1189: return $env{'form.counter'};
1190: }
1191: }
1192:
1193: =pod
1194:
1195: =item bubble_lines_for_part(part_response)
1196:
1197: Returns the number of lines required to get a response for
1198: $part_response (this is just $Apache::lonxml::counters_per_part{$part_response}
1199:
1200: =cut
1201:
1202: sub bubble_lines_for_part {
1203: my ($part_response) = @_;
1204:
1205: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1206: return 0;
1207: } else {
1208: return $Apache::lonxml::counters_per_part{$part_response};
1209: }
1210: }
1211:
1212: =pod
1213:
1214: =item clear_bubble_lines_for_part
1215:
1216: Clears the hash of bubble lines per part. If a caller
1217: needs to analyze several resources this should be called between
1218: resources to reset the hash for each problem being analyzed.
1219:
1220: =cut
1221:
1222: sub clear_bubble_lines_for_part {
1223: undef(%Apache::lonxml::counters_per_part);
1224: }
1225:
1226: =pod
1227:
1228: =item set_bubble_lines(part_response, value)
1229:
1230: If there is a problem part, that for whatever reason
1231: requires bubble lines that are not
1232: the same as the counter increment, it can call this sub during
1233: analysis to set its hash value explicitly.
1234:
1235: =cut
1236:
1237: sub set_bubble_lines {
1238: my ($part_response, $value) = @_;
1239:
1240: $Apache::lonxml::counters_per_part{$part_response} = $value;
1241: }
1242:
1243: =pod
1244:
1245: =item get_bubble_line_hash
1246:
1247: Returns the current bubble line hash. This is assumed to
1248: be small so we return a copy
1249:
1250:
1251: =cut
1252:
1253: sub get_bubble_line_hash {
1254: return %Apache::lonxml::counters_per_part;
1255: }
1256:
1257:
1258: #--------------------------------------------------
1259:
1260: sub get_all_text {
1261: my($tag,$pars,$style)= @_;
1262: my $gotfullstack=1;
1263: if (ref($pars) ne 'ARRAY') {
1264: $gotfullstack=0;
1265: $pars=[$pars];
1266: }
1267: if (ref($style) ne 'HASH') {
1268: $style={};
1269: }
1270: my $depth=0;
1271: my $token;
1272: my $result='';
1273: if ( $tag =~ m:^/: ) {
1274: my $tag=substr($tag,1);
1275: #&Apache::lonxml::debug("have:$tag:");
1276: my $top_empty=0;
1277: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1278: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1279: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1280: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1281: if ($token->[2]) {
1282: $result.='<![CDATA['.$token->[1].']]>';
1283: } else {
1284: $result.=$token->[1];
1285: }
1286: } elsif ($token->[0] eq 'PI') {
1287: $result.=$token->[2];
1288: } elsif ($token->[0] eq 'S') {
1289: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1290: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1291: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1292: $result.=$token->[4];
1293: } elsif ($token->[0] eq 'E') {
1294: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1295: #skip sending back the last end tag
1296: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1297: my $string=
1298: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1299: $$style{'/'.$token->[1]}.
1300: $token->[2].
1301: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1302: &Apache::lonxml::newparser($pars,\$string);
1303: #&Apache::lonxml::debug("reParsing $string");
1304: next;
1305: }
1306: if ($depth > -1) {
1307: $result.=$token->[2];
1308: } else {
1309: $$pars[-1]->unget_token($token);
1310: }
1311: }
1312: }
1313: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1314: if (($depth >=0) && ($#$pars > 0) ) {
1315: pop(@$pars);
1316: pop(@Apache::lonxml::pwd);
1317: }
1318: }
1319: if ($top_empty && $depth >= 0) {
1320: #never found the end tag ran out of text, throw error send back blank
1321: &error('Never found end tag for <'.$tag.
1322: '> current string <pre>'.
1323: &HTML::Entities::encode($result,'<>&"').
1324: '</pre>');
1325: if ($gotfullstack) {
1326: my $newstring='</'.$tag.'>'.$result;
1327: &Apache::lonxml::newparser($pars,\$newstring);
1328: }
1329: $result='';
1330: }
1331: } else {
1332: while ($#$pars > -1) {
1333: while ($token = $$pars[-1]->get_token) {
1334: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1335: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1336: ($token->[0] eq 'D')) {
1337: if ($token->[2]) {
1338: $result.='<![CDATA['.$token->[1].']]>';
1339: } else {
1340: $result.=$token->[1];
1341: }
1342: } elsif ($token->[0] eq 'PI') {
1343: $result.=$token->[2];
1344: } elsif ($token->[0] eq 'S') {
1345: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1346: $$pars[-1]->unget_token($token); last;
1347: } else {
1348: $result.=$token->[4];
1349: }
1350: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1351: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1352: } elsif ($token->[0] eq 'E') {
1353: $result.=$token->[2];
1354: }
1355: }
1356: if (($#$pars > 0) ) {
1357: pop(@$pars);
1358: pop(@Apache::lonxml::pwd);
1359: } else { last; }
1360: }
1361: }
1362: #&Apache::lonxml::debug("Exit:$result:");
1363: return $result
1364: }
1365:
1366: sub newparser {
1367: my ($parser,$contentref,$dir) = @_;
1368: push (@$parser,HTML::LCParser->new($contentref));
1369: $$parser[-1]->xml_mode(1);
1370: $$parser[-1]->marked_sections(1);
1371: if ( $dir eq '' ) {
1372: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1373: } else {
1374: push (@Apache::lonxml::pwd, $dir);
1375: }
1376: }
1377:
1378: sub parstring {
1379: my ($token) = @_;
1380: my (@vars,@values);
1381: foreach my $attr (@{$token->[3]}) {
1382: if ($attr!~/\W/) {
1383: my $val=$token->[2]->{$attr};
1384: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1385: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1386: $val =~ s/(\$)$/\\$1/;
1387: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1388: push(@vars,"\$$attr");
1389: push(@values,"\"$val\"");
1390: }
1391: }
1392: my $var_init =
1393: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1394: : '';
1395: return $var_init;
1396: }
1397:
1398: sub extlink {
1399: my ($res,$exact)=@_;
1400: if (!$exact) {
1401: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1402: }
1403: push(@Apache::lonxml::extlinks,$res)
1404: }
1405:
1406: sub writeallows {
1407: unless ($#extlinks>=0) { return; }
1408: my $thisurl = &Apache::lonnet::clutter(shift);
1409: if ($env{'httpref.'.$thisurl}) {
1410: $thisurl=$env{'httpref.'.$thisurl};
1411: }
1412: my $thisdir=$thisurl;
1413: $thisdir=~s/\/[^\/]+$//;
1414: my %httpref=();
1415: foreach (@extlinks) {
1416: $httpref{'httpref.'.
1417: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1418: }
1419: @extlinks=();
1420: &Apache::lonnet::appenv(\%httpref);
1421: }
1422:
1423: sub register_ssi {
1424: my ($url,%form)=@_;
1425: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1426: return '';
1427: }
1428:
1429: sub do_registered_ssi {
1430: foreach my $info (@Apache::lonxml::ssi_info) {
1431: my %form=%{ $info->{'form'}};
1432: my $url=$info->{'url'};
1433: &Apache::lonnet::ssi($url,%form);
1434: }
1435: }
1436:
1437: sub add_script_result {
1438: my ($display) = @_;
1439: push(@script_var_displays, $display);
1440: }
1441:
1442: #
1443: # Afterburner handles anchors, highlights and links
1444: #
1445: sub afterburn {
1446: my $result=shift;
1447: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1448: ['highlight','anchor','link']);
1449: if ($env{'form.highlight'}) {
1450: foreach (split(/\,/,$env{'form.highlight'})) {
1451: my $anchorname=$_;
1452: my $matchthis=$anchorname;
1453: $matchthis=~s/\_+/\\s\+/g;
1454: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1455: }
1456: }
1457: if ($env{'form.link'}) {
1458: foreach (split(/\,/,$env{'form.link'})) {
1459: my ($anchorname,$linkurl)=split(/\>/,$_);
1460: my $matchthis=$anchorname;
1461: $matchthis=~s/\_+/\\s\+/g;
1462: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1463: }
1464: }
1465: if ($env{'form.anchor'}) {
1466: my $anchorname=$env{'form.anchor'};
1467: my $matchthis=$anchorname;
1468: $matchthis=~s/\_+/\\s\+/g;
1469: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1470: $result.=(<<"ENDSCRIPT");
1471: <script type="text/javascript">
1472: document.location.hash='$anchorname';
1473: </script>
1474: ENDSCRIPT
1475: }
1476: return $result;
1477: }
1478:
1479: sub storefile {
1480: my ($file,$contents)=@_;
1481: &Apache::lonnet::correct_line_ends(\$contents);
1482: if (my $fh=Apache::File->new('>'.$file)) {
1483: print $fh $contents;
1484: $fh->close();
1485: return 1;
1486: } else {
1487: &warning(&mt('Unable to save file [_1]','<tt>'.$file.'</tt>'));
1488: return 0;
1489: }
1490: }
1491:
1492: sub createnewhtml {
1493: my $title=&mt('Title of document goes here');
1494: my $body=&mt('Body of document goes here');
1495: my $filecontents=(<<SIMPLECONTENT);
1496: <html>
1497: <head>
1498: <title>$title</title>
1499: </head>
1500: <body bgcolor="#FFFFFF">
1501: $body
1502: </body>
1503: </html>
1504: SIMPLECONTENT
1505: return $filecontents;
1506: }
1507:
1508: sub createnewsty {
1509: my $filecontents=(<<SIMPLECONTENT);
1510: <definetag name="">
1511: <render>
1512: <web></web>
1513: <tex></tex>
1514: </render>
1515: </definetag>
1516: SIMPLECONTENT
1517: return $filecontents;
1518: }
1519:
1520: sub createnewjs {
1521: my $filecontents=(<<SIMPLECONTENT);
1522: <script type="text/javascript" language="Javascript">
1523:
1524: </script>
1525: SIMPLECONTENT
1526: return $filecontents;
1527: }
1528:
1529: sub verify_html {
1530: my ($filecontents)=@_;
1531: my ($is_html,$is_xml);
1532: if ($filecontents =~/(?:\<|\<\;)\?xml[^\<]*\?(?:\>|\>\;)/is) {
1533: $is_xml = 1;
1534: } elsif ($filecontents =~/(?:\<|\<\;)html(?:\s+[^\<]+|\s*)(?:\>|\>\;)/is) {
1535: $is_html = 1;
1536: }
1537: unless ($is_xml || $is_html) {
1538: return &mt('File does not have [_1] or [_2] starting tag','<html>','<?xml ?>');
1539: }
1540: if ($is_html) {
1541: if ($filecontents!~/(?:\<|\<\;)\/html(?:\>|\>\;)/is) {
1542: return &mt('File does not have [_1] ending tag','<html>');
1543: }
1544: if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1545: return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>');
1546: }
1547: if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1548: return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>');
1549: }
1550: }
1551: return '';
1552: }
1553:
1554: sub renderingoptions {
1555: my %langchoices=('' => '');
1556: foreach (&Apache::loncommon::languageids()) {
1557: if (&Apache::loncommon::supportedlanguagecode($_)) {
1558: $langchoices{&Apache::loncommon::supportedlanguagecode($_)}
1559: = &Apache::loncommon::plainlanguagedescription($_);
1560: }
1561: }
1562: my $output;
1563: unless ($env{'form.forceedit'}) {
1564: $output .=
1565: '<span class="LC_nobreak">'.
1566: &mt('Language:').' '.
1567: &Apache::loncommon::select_form(
1568: $env{'form.languages'},
1569: 'languages',
1570: {&Apache::lonlocal::texthash(%langchoices)}).
1571: '</span>';
1572: }
1573: $output .=
1574: ' <span class="LC_nobreak">'.
1575: &mt('Math Rendering:').' '.
1576: &Apache::loncommon::select_form(
1577: $env{'form.texengine'},
1578: 'texengine',
1579: {&Apache::lonlocal::texthash
1580: ('' => '',
1581: 'tth' => 'tth (TeX to HTML)',
1582: 'jsMath' => 'jsMath',
1583: 'mimetex' => 'mimetex (Convert to Images)')}).
1584: '</span>';
1585: return $output;
1586: }
1587:
1588: sub inserteditinfo {
1589: my ($filecontents, $filetype, $filename)=@_;
1590: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1591: my $xml_help = '';
1592: my $initialize='';
1593: my $textarea_id = 'filecont';
1594: my $dragmath_button;
1595: my ($add_to_onload, $add_to_onresize);
1596: $initialize=&Apache::lonhtmlcommon::spellheader();
1597: if (($filetype eq 'html') && (&Apache::lonhtmlcommon::htmlareabrowser())) {
1598: my $lang = &Apache::lonhtmlcommon::htmlarea_lang();
1599: my %textarea_args = (
1600: fullpage => 'true',
1601: dragmath => 'math',
1602: );
1603: $initialize .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
1604: }
1605: $initialize .= (<<FULLPAGE);
1606: <script type="text/javascript">
1607: // <![CDATA[
1608: function initDocument() {
1609: resize_textarea('$textarea_id','LC_aftertextarea');
1610: }
1611: // ]]>
1612: </script>
1613: FULLPAGE
1614: if ($filetype eq 'html') {
1615: $dragmath_button = '<span id="math_filecont">'.&Apache::lonhtmlcommon::dragmath_button('filecont',1).'</span>';
1616: $initialize .= "\n".&Apache::lonhtmlcommon::dragmath_js('EditMathPopup');
1617: }
1618: $add_to_onload = 'initDocument();';
1619: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1620:
1621: if ($filetype eq 'html') {
1622: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1623: }
1624:
1625: my $titledisplay=&display_title();
1626: my $textareaclass;
1627: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1628: 'vi' => 'Save and View',
1629: 'dv' => 'Discard Edits and View',
1630: 'un' => 'undo',
1631: 'ed' => 'Edit');
1632: my $spelllink = &Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1633: my $textarea_events = &Apache::edit::element_change_detection();
1634: my $form_events = &Apache::edit::form_change_detection();
1635: my $htmlerror;
1636: if ($filetype eq 'html') {
1637: $htmlerror=&verify_html($filecontents);
1638: if ($htmlerror) {
1639: $htmlerror='<span class="LC_error">'.$htmlerror.'</span>';
1640: }
1641: if (&Apache::lonhtmlcommon::htmlareabrowser()) {
1642: $textareaclass = 'class="LC_richDefaultOff"';
1643: }
1644: }
1645: my $editfooter=(<<ENDFOOTER);
1646: $initialize
1647: <a name="editsection" />
1648: <form $form_events method="post" name="xmledit">
1649: <div class="LC_edit_problem_editxml_header">
1650: <table class="LC_edit_problem_header_title"><tr><td>
1651: $filename
1652: </td><td align="right">
1653: $xml_help
1654: </td></tr>
1655: </table>
1656: <div class="LC_edit_problem_discards">
1657: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1658: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" />
1659: $htmlerror $dragmath_button
1660: </div>
1661: <div class="LC_edit_problem_saves">
1662: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1663: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1664: </div>
1665: </div>
1666: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont" $textareaclass>$filecontents</textarea><br />$spelllink
1667: <div id="LC_aftertextarea">
1668: <br />
1669: $titledisplay
1670: </div>
1671: </form>
1672: </body>
1673: ENDFOOTER
1674: return ($editfooter,$add_to_onload,$add_to_onresize);;
1675: }
1676:
1677: sub get_target {
1678: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1679: if ( $env{'request.state'} eq 'published') {
1680: if ( defined($env{'form.grade_target'})
1681: && ($viewgrades == 'F' )) {
1682: return ($env{'form.grade_target'});
1683: } elsif (defined($env{'form.grade_target'})) {
1684: if (($env{'form.grade_target'} eq 'web') ||
1685: ($env{'form.grade_target'} eq 'tex') ) {
1686: return $env{'form.grade_target'}
1687: } else {
1688: return 'web';
1689: }
1690: } else {
1691: return 'web';
1692: }
1693: } elsif ($env{'request.state'} eq 'construct') {
1694: if ( defined($env{'form.grade_target'})) {
1695: return ($env{'form.grade_target'});
1696: } else {
1697: return 'web';
1698: }
1699: } else {
1700: return 'web';
1701: }
1702: }
1703:
1704: sub handler {
1705: my $request=shift;
1706:
1707: my $target=&get_target();
1708: $Apache::lonxml::debug=$env{'user.debug'};
1709:
1710: &Apache::loncommon::content_type($request,'text/html');
1711: &Apache::loncommon::no_cache($request);
1712: if ($env{'request.state'} eq 'published') {
1713: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1714: 'lastrevisiondate'));
1715: }
1716: # Embedded Flash movies from Camtasia served from https will not display in IE
1717: # if XML config file has expired from cache.
1718: if ($ENV{'SERVER_PORT'} == 443) {
1719: if ($request->uri =~ /\.xml$/) {
1720: my ($httpbrowser,$clientbrowser) =
1721: &Apache::loncommon::decode_user_agent($request);
1722: if ($clientbrowser =~ /^explorer$/i) {
1723: delete $request->headers_out->{'Cache-control'};
1724: delete $request->headers_out->{'Pragma'};
1725: my $expiration = time + 60;
1726: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime($expiration));
1727: $request->headers_out->set("Expires" => $date);
1728: }
1729: }
1730: }
1731: $request->send_http_header;
1732:
1733: return OK if $request->header_only;
1734:
1735:
1736: my $file=&Apache::lonnet::filelocation("",$request->uri);
1737: my ($filetype,$breadcrumbtext);
1738: if ($file =~ /\.(sty|css|js|txt|tex)$/) {
1739: $filetype=$1;
1740: } else {
1741: $filetype='html';
1742: }
1743: if ($filetype eq 'sty') {
1744: $breadcrumbtext = 'Style File Editor';
1745: } elsif ($filetype eq 'js') {
1746: $breadcrumbtext = 'Javascript Editor';
1747: } elsif ($filetype eq 'css') {
1748: $breadcrumbtext = 'CSS Editor';
1749: } elsif ($filetype eq 'txt') {
1750: $breadcrumbtext = 'Text Editor';
1751: } elsif ($filetype eq 'tex') {
1752: $breadcrumbtext = 'TeX Editor';
1753: } else {
1754: $breadcrumbtext = 'HTML Editor';
1755: }
1756:
1757: #
1758: # Edit action? Save file.
1759: #
1760: if (!($env{'request.state'} eq 'published')) {
1761: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1762: my $html_file=&Apache::lonnet::getfile($file);
1763: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1764: if ($env{'form.savethisfile'}) {
1765: $env{'form.editmode'}='Edit'; #force edit mode
1766: }
1767: }
1768: }
1769: my %mystyle;
1770: my $result = '';
1771: my $filecontents=&Apache::lonnet::getfile($file);
1772: if ($filecontents eq -1) {
1773: my $start_page=&Apache::loncommon::start_page('File Error');
1774: my $end_page=&Apache::loncommon::end_page();
1775: my $errormsg='<p class="LC_error">'
1776: .&mt('File not found: [_1]'
1777: ,'<span class="LC_filename">'.$file.'</span>')
1778: .'</p>';
1779: $result=(<<ENDNOTFOUND);
1780: $start_page
1781: $errormsg
1782: $end_page
1783: ENDNOTFOUND
1784: $filecontents='';
1785: if ($env{'request.state'} ne 'published') {
1786: if ($filetype eq 'sty') {
1787: $filecontents=&createnewsty();
1788: } elsif ($filetype eq 'js') {
1789: $filecontents=&createnewjs();
1790: } elsif ($filetype ne 'css' && $filetype ne 'txt' && $filetype ne 'tex') {
1791: $filecontents=&createnewhtml();
1792: }
1793: $env{'form.editmode'}='Edit'; #force edit mode
1794: }
1795: } else {
1796: unless ($env{'request.state'} eq 'published') {
1797: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1798: &Apache::lonxml::error(&mt('This file appears to be a rendering of a LON-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
1799: }
1800: #
1801: # we are in construction space, see if edit mode forced
1802: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1803: ['editmode']);
1804: }
1805: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1806: if ($filetype eq 'html' || $filetype eq 'sty') {
1807: &Apache::structuretags::reset_problem_globals();
1808: $result = &Apache::lonxml::xmlparse($request,$target,
1809: $filecontents,'',%mystyle);
1810: # .html files may contain <problem> or <Task> need to clean
1811: # up if it did
1812: &Apache::structuretags::reset_problem_globals();
1813: &Apache::lonhomework::finished_parsing();
1814: } elsif ($filetype eq 'tex') {
1815: $result = &Apache::lontexconvert::converted(\$filecontents,
1816: $env{'form.texengine'});
1817: if ($env{'form.return_only_error_and_warning_counts'}) {
1818: $result = "$errorcount:$warningcount";
1819: }
1820: } else {
1821: $result = $filecontents;
1822: }
1823: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1824: ['rawmode']);
1825: if ($env{'form.rawmode'}) { $result = $filecontents; }
1826: if (($filetype ne 'html') &&
1827: (!$env{'form.return_only_error_and_warning_counts'})) {
1828: my $nochgview = 1;
1829: my $controls = '';
1830: if ($env{'request.state'} eq 'construct') {
1831: $controls = &Apache::loncommon::head_subbox(
1832: &Apache::loncommon::CSTR_pageheader()
1833: .&Apache::londefdef::edit_controls($nochgview));
1834: }
1835: if ($filetype ne 'sty' && $filetype ne 'tex') {
1836: $result =~ s/</</g;
1837: $result =~ s/>/>/g;
1838: $result = '<table class="LC_sty_begin">'.
1839: '<tr><td><b><pre>'.$result.
1840: '</pre></b></td></tr></table>';
1841: }
1842: if ($env{'environment.remote'} eq 'off') {
1843: my $brcrum;
1844: if ($env{'request.state'} eq 'construct') {
1845: $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1846: 'text' => 'Construction Space'},
1847: {'href' => '',
1848: 'text' => $breadcrumbtext}];
1849: } else {
1850: $brcrum = ''; # FIXME: Where are we?
1851: }
1852: my %options = ('bread_crumbs' => $brcrum,
1853: 'bgcolor' => '#FFFFFF');
1854: $result =
1855: &Apache::loncommon::start_page(undef,undef,\%options)
1856: .$controls
1857: .$result
1858: .&Apache::loncommon::end_page();
1859: } else {
1860: $result = $controls.$result;
1861: }
1862: }
1863: }
1864: }
1865:
1866: #
1867: # Edit action? Insert editing commands
1868: #
1869: unless ($env{'request.state'} eq 'published') {
1870: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1871: {
1872: my $displayfile=$request->uri;
1873: $displayfile=~s/^\/[^\/]*//;
1874:
1875: my ($edit_info, $add_to_onload, $add_to_onresize)=
1876: &inserteditinfo($filecontents,$filetype,$displayfile);
1877:
1878: my %options =
1879: ('add_entries' =>
1880: {'onresize' => $add_to_onresize,
1881: 'onload' => $add_to_onload, });
1882: my $header;
1883: if ($env{'request.state'} eq 'construct') {
1884: $options{'bread_crumbs'} = [{
1885: 'href' => &Apache::loncommon::authorspace(),
1886: 'text' => 'Construction Space'},
1887: {'href' => '',
1888: 'text' => $breadcrumbtext}];
1889: $header = &Apache::loncommon::head_subbox(
1890: &Apache::loncommon::CSTR_pageheader());
1891: }
1892: if ($env{'environment.remote'} ne 'off') {
1893: $options{'bgcolor'} = '#FFFFFF';
1894: $options{'only_body'} = 1;
1895: }
1896: my $js =
1897: &Apache::edit::js_change_detection().
1898: &Apache::loncommon::resize_textarea_js();
1899: my $start_page = &Apache::loncommon::start_page(undef,$js,
1900: \%options);
1901: $result = $start_page
1902: .$header
1903: .&Apache::lonxml::message_location()
1904: .$edit_info
1905: .&Apache::loncommon::end_page();
1906: }
1907: }
1908: if ($filetype eq 'html') { &writeallows($request->uri); }
1909:
1910: &Apache::lonxml::add_messages(\$result);
1911: $request->print($result);
1912:
1913: return OK;
1914: }
1915:
1916: sub display_title {
1917: my $result;
1918: if ($env{'request.state'} eq 'construct') {
1919: my $title=&Apache::lonnet::gettitle();
1920: if (!defined($title) || $title eq '') {
1921: $title = $env{'request.filename'};
1922: $title = substr($title, rindex($title, '/') + 1);
1923: }
1924: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA "
1925: .&mt('Construction Space')."';</script>";
1926: }
1927: return $result;
1928: }
1929:
1930: sub debug {
1931: if ($Apache::lonxml::debug eq "1") {
1932: $|=1;
1933: my $request=$Apache::lonxml::request;
1934: if (!$request) {
1935: eval { $request=Apache->request; };
1936: }
1937: if (!$request) {
1938: eval { $request=Apache2::RequestUtil->request; };
1939: }
1940: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1941: #&Apache::lonnet::logthis($_[0]);
1942: }
1943: }
1944:
1945: sub show_error_warn_msg {
1946: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1947: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1948: return 1;
1949: }
1950: return (($Apache::lonxml::debug eq 1) ||
1951: ($env{'request.state'} eq 'construct') ||
1952: ($Apache::lonhomework::browse eq 'F'
1953: &&
1954: $env{'form.show_errors'} eq 'on'));
1955: }
1956:
1957: sub error {
1958: my @errors = @_;
1959:
1960: $errorcount++;
1961:
1962: $Apache::lonxml::internal_error=1;
1963:
1964: if (defined($Apache::inputtags::part)) {
1965: if ( @Apache::inputtags::response ) {
1966: push(@errors,
1967: &mt("This error occurred while processing response [_1] in part [_2]",
1968: $Apache::inputtags::response[-1],
1969: $Apache::inputtags::part));
1970: } else {
1971: push(@errors,
1972: &mt("This error occurred while processing part [_1]",
1973: $Apache::inputtags::part));
1974: }
1975: }
1976:
1977: if ( &show_error_warn_msg() ) {
1978: # If printing in construction space, put the error inside <pre></pre>
1979: push(@Apache::lonxml::error_messages,
1980: $Apache::lonxml::warnings_error_header
1981: .'<div class="LC_error">'
1982: .'<b>'.&mt('ERROR:').' </b>'.join("<br />\n",@errors)
1983: ."</div>\n");
1984: $Apache::lonxml::warnings_error_header='';
1985: } else {
1986: my $errormsg;
1987: my ($symb)=&Apache::lonnet::symbread();
1988: if ( !$symb ) {
1989: #public or browsers
1990: $errormsg=&mt("An error occurred while processing this resource. The author has been notified.");
1991: }
1992: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1993: push(@errors,
1994: &mt("The error occurred on host [_1]",
1995: "<tt>$host</tt>"));
1996:
1997: my $msg = join('<br />', @errors);
1998:
1999: #notify author
2000: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
2001: #notify course
2002: if ( $symb && $env{'request.course.id'} ) {
2003: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
2004: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
2005: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
2006: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
2007: my $baseurl = &Apache::lonnet::clutter($declutter);
2008: my @userlist;
2009: foreach (keys %users) {
2010: my ($user,$domain) = split(/:/, $_);
2011: push(@userlist,"$user\@$domain");
2012: my $key=$declutter.'_'.$user.'_'.$domain;
2013: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
2014: [$key],
2015: $cdom,$cnum);
2016: my $now=time;
2017: if ($now-$lastnotified{$key}>86400) {
2018: my $title = &Apache::lonnet::gettitle($symb);
2019: my $sentmessage;
2020: &Apache::lonmsg::user_normal_msg($user,$domain,
2021: "Error [$title]",$msg,'',$baseurl,'','',
2022: \$sentmessage,$symb,$title,1);
2023: &Apache::lonnet::put('nohist_xmlerrornotifications',
2024: {$key => $now},
2025: $cdom,$cnum);
2026: }
2027: }
2028: if ($env{'request.role.adv'}) {
2029: $errormsg=&mt("An error occurred while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
2030: } else {
2031: $errormsg=&mt("An error occurred while processing this resource. The instructor has been notified.");
2032: }
2033: }
2034: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
2035: }
2036: }
2037:
2038: sub warning {
2039: $warningcount++;
2040:
2041: if ($env{'form.grade_target'} ne 'tex') {
2042: if ( &show_error_warn_msg() ) {
2043: push(@Apache::lonxml::warning_messages,
2044: $Apache::lonxml::warnings_error_header
2045: .'<div class="LC_warning">'
2046: .&mt('[_1]W[_2]ARNING','<b>','</b>')."<b>:</b> ".join('<br />',@_)
2047: ."</div>\n"
2048: );
2049: $Apache::lonxml::warnings_error_header='';
2050: }
2051: }
2052: }
2053:
2054: sub info {
2055: if ($env{'form.grade_target'} ne 'tex'
2056: && $env{'request.state'} eq 'construct') {
2057: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
2058: }
2059: }
2060:
2061: sub message_location {
2062: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
2063: }
2064:
2065: sub add_messages {
2066: my ($msg)=@_;
2067: my $result=join(' ',
2068: @Apache::lonxml::info_messages,
2069: @Apache::lonxml::error_messages,
2070: @Apache::lonxml::warning_messages);
2071: undef(@Apache::lonxml::info_messages);
2072: undef(@Apache::lonxml::error_messages);
2073: undef(@Apache::lonxml::warning_messages);
2074: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
2075: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
2076: }
2077:
2078: sub get_param {
2079: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
2080: if ( ! $context ) { $context = -1; }
2081: my $args ='';
2082: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
2083: if ( ! $Apache::lonxml::usestyle ) {
2084: $args=$Apache::lonxml::style_values.$args;
2085: }
2086: if ( ! $args ) { return undef; }
2087: if ( $case_insensitive ) {
2088: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
2089: return &Apache::run::run("{$args;".'return $'.$param.'}',
2090: $safeeval); #'
2091: } else {
2092: return undef;
2093: }
2094: } else {
2095: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
2096: return &Apache::run::run("{$args;".'return $'.$param.'}',
2097: $safeeval); #'
2098: } else {
2099: return undef;
2100: }
2101: }
2102: }
2103:
2104: sub get_param_var {
2105: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
2106: if ( ! $context ) { $context = -1; }
2107: my $args ='';
2108: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
2109: if ( ! $Apache::lonxml::usestyle ) {
2110: $args=$Apache::lonxml::style_values.$args;
2111: }
2112: &Apache::lonxml::debug("Args are $args param is $param");
2113: if ($case_insensitive) {
2114: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
2115: return undef;
2116: }
2117: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
2118: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
2119: &Apache::lonxml::debug("first run is $value");
2120: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
2121: &Apache::lonxml::debug("doing second");
2122: my @result=&Apache::run::run("return $value",$safeeval,1);
2123: if (!defined($result[0])) {
2124: return $value
2125: } else {
2126: if (wantarray) { return @result; } else { return $result[0]; }
2127: }
2128: } else {
2129: return $value;
2130: }
2131: }
2132:
2133: sub register_insert_xml {
2134: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
2135: .'/insertlist.xml');
2136: my ($tagnum,$in_help)=(0,0);
2137: my @alltags;
2138: my $tag;
2139: while (my $token = $parser->get_token()) {
2140: if ($token->[0] eq 'S') {
2141: my $key;
2142: if ($token->[1] eq 'tag') {
2143: $tag = $token->[2]{'name'};
2144: $insertlist{$tagnum.'.tag'} = $tag;
2145: $insertlist{$tag.'.num'} = $tagnum;
2146: push(@alltags,$tag);
2147: } elsif ($in_help && $token->[1] eq 'file') {
2148: $key = $tag.'.helpfile';
2149: } elsif ($in_help && $token->[1] eq 'description') {
2150: $key = $tag.'.helpdesc';
2151: } elsif ($token->[1] eq 'description' ||
2152: $token->[1] eq 'color' ||
2153: $token->[1] eq 'show' ) {
2154: $key = $tag.'.'.$token->[1];
2155: } elsif ($token->[1] eq 'insert_sub') {
2156: $key = $tag.'.function';
2157: } elsif ($token->[1] eq 'help') {
2158: $in_help=1;
2159: } elsif ($token->[1] eq 'allow') {
2160: $key = $tag.'.allow';
2161: }
2162: if (defined($key)) {
2163: $insertlist{$key} = $parser->get_text();
2164: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
2165: }
2166: } elsif ($token->[0] eq 'E') {
2167: if ($token->[1] eq 'tag') {
2168: undef($tag);
2169: $tagnum++;
2170: } elsif ($token->[1] eq 'help') {
2171: undef($in_help);
2172: }
2173: }
2174: }
2175:
2176: # parse the allows and ignore tags set to <show>no</show>
2177: foreach my $tag (@alltags) {
2178: next if (!exists($insertlist{$tag.'.allow'}));
2179: my $allow = $insertlist{$tag.'.allow'};
2180: foreach my $element (split(',',$allow)) {
2181: $element =~ s/(^\s*|\s*$ )//gx;
2182: if (!exists($insertlist{$element.'.show'})
2183: || $insertlist{$element.'.show'} ne 'no') {
2184: push(@{ $insertlist{$tag.'.which'} },$element);
2185: }
2186: }
2187: }
2188: }
2189:
2190: sub register_insert {
2191: return ®ister_insert_xml(@_);
2192: # &dump_insertlist('2');
2193: }
2194:
2195: sub dump_insertlist {
2196: my ($ext) = @_;
2197: open(XML,">/tmp/insertlist.xml.$ext");
2198: print XML ("<insertlist>");
2199: my $i=0;
2200:
2201: while (exists($insertlist{"$i.tag"})) {
2202: my $tag = $insertlist{"$i.tag"};
2203: print XML ("
2204: \t<tag name=\"$tag\">");
2205: if (defined($insertlist{"$tag.description"})) {
2206: print XML ("
2207: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2208: }
2209: if (defined($insertlist{"$tag.color"})) {
2210: print XML ("
2211: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2212: }
2213: if (defined($insertlist{"$tag.function"})) {
2214: print XML ("
2215: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2216: }
2217: if (defined($insertlist{"$tag.show"})
2218: && $insertlist{"$tag.show"} ne 'yes') {
2219: print XML ("
2220: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2221: }
2222: if (defined($insertlist{"$tag.helpfile"})) {
2223: print XML ("
2224: \t\t<help>
2225: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2226: if ($insertlist{"$tag.helpdesc"} ne '') {
2227: print XML ("
2228: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2229: }
2230: print XML ("
2231: \t\t</help>");
2232: }
2233: if (defined($insertlist{"$tag.which"})) {
2234: print XML ("
2235: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2236: }
2237: print XML ("
2238: \t</tag>");
2239: $i++;
2240: }
2241: print XML ("\n</insertlist>\n");
2242: close(XML);
2243: }
2244:
2245: sub description {
2246: my ($token)=@_;
2247: my $tag = &get_tag($token);
2248: return $insertlist{$tag.'.description'};
2249: }
2250:
2251: # Returns a list containing the help file, and the description
2252: sub helpinfo {
2253: my ($token)=@_;
2254: my $tag = &get_tag($token);
2255: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2256: }
2257:
2258: sub get_tag {
2259: my ($token)=@_;
2260: my $tagnum;
2261: my $tag=$token->[1];
2262: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2263: my $testtag = $namespace.'::'.$tag;
2264: $tagnum = $insertlist{"$testtag.num"};
2265: last if (defined($tagnum));
2266: }
2267: if (!defined($tagnum)) {
2268: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2269: }
2270: return $insertlist{"$tagnum.tag"};
2271: }
2272:
2273: ############################################################
2274: # PDF-FORM-METHODS
2275:
2276: =pod
2277:
2278: =item &print_pdf_radiobutton(fieldname, value)
2279:
2280: Returns a latexline to generate a PDF-Form-Radiobutton.
2281: Note: Radiobuttons with equal names are automaticly grouped
2282: in a selection-group.
2283:
2284: $fieldname: PDF internalname of the radiobutton(group)
2285: $value: Value of radiobutton
2286:
2287: =cut
2288: sub print_pdf_radiobutton {
2289: my ($fieldname, $value) = @_;
2290: return '\radioButton[\symbolchoice{circle}]{'
2291: .$fieldname.'}{10bp}{10bp}{'.$value.'}';
2292: }
2293:
2294:
2295: =pod
2296:
2297: =item &print_pdf_start_combobox(fieldname)
2298:
2299: Starts a latexline to generate a PDF-Form-Combobox with text.
2300:
2301: $fieldname: PDF internal name of the Combobox
2302:
2303: =cut
2304: sub print_pdf_start_combobox {
2305: my $result;
2306: my ($fieldName) = @_;
2307: $result .= '\begin{tabularx}{\textwidth}{p{2.5cm}X}'."\n";
2308: $result .= '\comboBox[]{'.$fieldName.'}{2.3cm}{14bp}{'; #
2309:
2310: return $result;
2311: }
2312:
2313:
2314: =pod
2315:
2316: =item &print_pdf_add_combobox_option(options)
2317:
2318: Generates a latexline to add Options to a PDF-Form-ComboBox.
2319:
2320: $option: PDF internal name of the Combobox-Option
2321:
2322: =cut
2323: sub print_pdf_add_combobox_option {
2324:
2325: my $result;
2326: my ($option) = @_;
2327:
2328: $result .= '('.$option.')';
2329:
2330: return $result;
2331: }
2332:
2333:
2334: =pod
2335:
2336: =item &print_pdf_end_combobox(text) {
2337:
2338: Returns latexcode to end a PDF-Form-Combobox with text.
2339:
2340: =cut
2341: sub print_pdf_end_combobox {
2342: my $result;
2343: my ($text) = @_;
2344:
2345: $result .= '}&'.$text."\\\\\n";
2346: $result .= '\end{tabularx}' . "\n";
2347: $result .= '\hspace{2mm}' . "\n";
2348: return $result;
2349: }
2350:
2351:
2352: =pod
2353:
2354: =item &print_pdf_hiddenField(fieldname, user, domain)
2355:
2356: Returns a latexline to generate a PDF-Form-hiddenField with userdata.
2357:
2358: $fieldname label for hiddentextfield
2359: $user: name of user
2360: $domain: domain of user
2361:
2362: =cut
2363: sub print_pdf_hiddenfield {
2364: my $result;
2365: my ($fieldname, $user, $domain) = @_;
2366:
2367: $result .= '\textField [\F{\FHidden}\F{-\FPrint}\V{'.$domain.'&'.$user.'}]{'.$fieldname.'}{0in}{0in}'."\n";
2368:
2369: return $result;
2370: }
2371:
2372: 1;
2373: __END__
2374:
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