1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.240 2003/02/26 17:52:14 albertel 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: # last modified 06/26/00 by Alexander Sakharuk
40: # 11/6 Gerd Kortemeyer
41: # 6/1/1 Gerd Kortemeyer
42: # 2/21,3/13 Guy
43: # 3/29,5/4 Gerd Kortemeyer
44: # 5/26 Gerd Kortemeyer
45: # 5/27 H. K. Ng
46: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
47: # 6/12,6/13 H. K. Ng
48: # 6/16 Gerd Kortemeyer
49: # 7/27 H. K. Ng
50: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
51: # Guy Albertelli
52: # 9/26 Gerd Kortemeyer
53: # Dec Guy Albertelli
54: # YEAR=2002
55: # 1/1 Gerd Kortemeyer
56: # 1/2 Matthew Hall
57: # 1/3 Gerd Kortemeyer
58: #
59:
60: package Apache::lonxml;
61: use vars
62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
63: use strict;
64: use HTML::LCParser();
65: use HTML::TreeBuilder();
66: use HTML::Entities();
67: use Safe();
68: use Safe::Hole();
69: use Math::Cephes();
70: use Math::Random();
71: use Opcode();
72:
73: sub register {
74: my ($space,@taglist) = @_;
75: foreach my $temptag (@taglist) {
76: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
77: }
78: }
79:
80: sub deregister {
81: my ($space,@taglist) = @_;
82: foreach my $temptag (@taglist) {
83: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
84: if ($tempspace eq $space) {
85: pop(@{ $Apache::lonxml::alltags{$temptag} });
86: }
87: }
88: #&printalltags();
89: }
90:
91: use Apache::Constants qw(:common);
92: use Apache::lontexconvert();
93: use Apache::style();
94: use Apache::run();
95: use Apache::londefdef();
96: use Apache::scripttag();
97: use Apache::edit();
98: use Apache::lonnet();
99: use Apache::File();
100: use Apache::loncommon();
101: use Apache::lonfeedback();
102: use Apache::lonmsg();
103: use Apache::loncacc();
104:
105: #================================================== Main subroutine: xmlparse
106: #debugging control, to turn on debugging modify the correct handler
107: $Apache::lonxml::debug=0;
108:
109: # keeps count of the number of warnings and errors generated in a parse
110: $warningcount=0;
111: $errorcount=0;
112:
113: #path to the directory containing the file currently being processed
114: @pwd=();
115:
116: #these two are used for capturing a subset of the output for later processing,
117: #don't touch them directly use &startredirection and &endredirection
118: @outputstack = ();
119: $redirection = 0;
120:
121: #controls wheter the <import> tag actually does
122: $import = 1;
123: @extlinks=();
124:
125: # meta mode is a bit weird only some output is to be turned off
126: #<output> tag turns metamode off (defined in londefdef.pm)
127: $metamode = 0;
128:
129: # turns on and of run::evaluate actually derefencing var refs
130: $evaluate = 1;
131:
132: # data structure for eidt mode, determines what tags can go into what other tags
133: %insertlist=();
134:
135: # stores the list of active tag namespaces
136: @namespace=();
137:
138: # if 0 all high ASCII characters will be encoded into HTML Entities
139: $prevent_entity_encode=0;
140:
141: # has the dynamic menu been updated to know about this resource
142: $Apache::lonxml::registered=0;
143:
144: # a pointer the the Apache request object
145: $Apache::lonxml::request='';
146:
147: # a problem number counter, and check on ether it is used
148: $Apache::lonxml::counter=1;
149: $Apache::lonxml::counter_changed=0;
150:
151: #internal check on whether to look at style defs
152: $Apache::lonxml::usestyle=1;
153:
154: sub xmlbegin {
155: my $output='';
156: if ($ENV{'browser.mathml'}) {
157: $output='<?xml version="1.0"?>'
158: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
159: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
160: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
161: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
162: .'xmlns="http://www.w3.org/TR/REC-html40">';
163: } else {
164: $output='<html>';
165: }
166: return $output;
167: }
168:
169: sub xmlend {
170: my ($discussiononly,$symb)=@_;
171: my $discussion='';
172: if ($ENV{'request.course.id'}) {
173: my $crs='/'.$ENV{'request.course.id'};
174: if ($ENV{'request.course.sec'}) {
175: $crs.='_'.$ENV{'request.course.sec'};
176: }
177: $crs=~s/\_/\//g;
178: my $seeid=&Apache::lonnet::allowed('rin',$crs);
179: unless ($symb) {
180: $symb=&Apache::lonnet::symbread();
181: }
182: if ($symb) {
183: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
184: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
185: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
186: if ($contrib{'version'}) {
187: unless ($discussiononly) {
188: $discussion.=
189: '<address><hr />';
190: }
191: my $idx;
192: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
193: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
194: my $deleted=($contrib{'deleted'}=~/\.$idx\./);
195: unless ((($hidden) && (!$seeid)) || ($deleted)) {
196: my $message=$contrib{$idx.':message'};
197: $message=~s/\n/\<br \/\>/g;
198: $message=&Apache::lontexconvert::msgtexconverted($message);
199: if ($message) {
200: if ($hidden) {
201: $message='<font color="#888888">'.$message.'</font>';
202: }
203: my $screenname=&Apache::loncommon::screenname(
204: $contrib{$idx.':sendername'},
205: $contrib{$idx.':senderdomain'});
206: my $plainname=&Apache::loncommon::nickname(
207: $contrib{$idx.':sendername'},
208: $contrib{$idx.':senderdomain'});
209:
210: my $sender='Anonymous';
211: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
212: $sender=&Apache::loncommon::aboutmewrapper(
213: $plainname,
214: $contrib{$idx.':sendername'},
215: $contrib{$idx.':senderdomain'}).' ('.
216: $contrib{$idx.':sendername'}.' at '.
217: $contrib{$idx.':senderdomain'}.')';
218: if ($contrib{$idx.':anonymous'}) {
219: $sender.=' [anonymous] '.
220: $screenname;
221: }
222: if ($seeid) {
223: if ($hidden) {
224: $sender.=' <a href="/adm/feedback?unhide='.
225: $symb.':::'.$idx.'">Make Visible</a>';
226: } else {
227: $sender.=' <a href="/adm/feedback?hide='.
228: $symb.':::'.$idx.'">Hide</a>';
229: }
230: $sender.=' <a href="/adm/feedback?deldisc='.
231: $symb.':::'.$idx.'">Delete</a>';
232: }
233: } else {
234: if ($screenname) {
235: $sender='<i>'.$screenname.'</i>';
236: }
237: }
238: $discussion.='<p><b>'.$sender.'</b> ('.
239: localtime($contrib{$idx.':timestamp'}).
240: '):<blockquote>'.$message.
241: '</blockquote></p>';
242: }
243: }
244: }
245: unless ($discussiononly) {
246: $discussion.='</address>';
247: }
248: }
249: if ($discussiononly) {
250: $discussion.=(<<ENDDISCUSS);
251: <form action="/adm/feedback" method="post" name="mailform">
252: <input type="submit" name="discuss" value="Post Discussion" />
253: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
254: <input type="hidden" name="symb" value="$symb" />
255: <input type="hidden" name="sendit" value="true" />
256: <br />
257: <font size="1">Note: in anonymous discussion, your name is visible only to
258: course faculty</font><br />
259: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
260: </form>
261: ENDDISCUSS
262: $discussion.=&Apache::lonfeedback::generate_preview_button();
263: }
264: }
265: }
266: return $discussion.($discussiononly?'':'</html>');
267: }
268:
269: sub tokeninputfield {
270: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
271: $defhost=~tr/a-z/A-Z/;
272: return (<<ENDINPUTFIELD)
273: <script type="text/javascript">
274: function updatetoken() {
275: var comp=new Array;
276: var barcode=unescape(document.tokeninput.barcode.value);
277: comp=barcode.split('*');
278: if (typeof(comp[0])!="undefined") {
279: document.tokeninput.codeone.value=comp[0];
280: }
281: if (typeof(comp[1])!="undefined") {
282: document.tokeninput.codetwo.value=comp[1];
283: }
284: if (typeof(comp[2])!="undefined") {
285: comp[2]=comp[2].toUpperCase();
286: document.tokeninput.codethree.value=comp[2];
287: }
288: document.tokeninput.barcode.value='';
289: }
290: </script>
291: <form method="post" name="tokeninput">
292: <table border="2" bgcolor="#FFFFBB">
293: <tr><th>DocID Checkin</th></tr>
294: <tr><td>
295: <table>
296: <tr>
297: <td>Scan in Barcode</td>
298: <td><input type="text" size="22" name="barcode"
299: onChange="updatetoken()"/></td>
300: </tr>
301: <tr><td><i>or</i> Type in DocID</td>
302: <td>
303: <input type="text" size="5" name="codeone" />
304: <b><font size="+2">*</font></b>
305: <input type="text" size="5" name="codetwo" />
306: <b><font size="+2">*</font></b>
307: <input type="text" size="10" name="codethree" value="$defhost"
308: onChange="this.value=this.value.toUpperCase()" />
309: </td></tr>
310: </table>
311: </td></tr>
312: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
313: </table>
314: </form>
315: ENDINPUTFIELD
316: }
317:
318: sub maketoken {
319: my ($symb,$tuname,$tudom,$tcrsid)=@_;
320: unless ($symb) {
321: $symb=&Apache::lonnet::symbread();
322: }
323: unless ($tuname) {
324: $tuname=$ENV{'user.name'};
325: $tudom=$ENV{'user.domain'};
326: $tcrsid=$ENV{'request.course.id'};
327: }
328:
329: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
330: }
331:
332: sub printtokenheader {
333: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
334: unless ($token) { return ''; }
335:
336: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
337: unless ($tsymb) {
338: $tsymb=$symb;
339: }
340: unless ($tuname) {
341: $tuname=$name;
342: $tudom=$domain;
343: $tcrsid=$courseid;
344: }
345:
346: my %reply=&Apache::lonnet::get('environment',
347: ['firstname','middlename','lastname','generation'],
348: $tudom,$tuname);
349: my $plainname=$reply{'firstname'}.' '.
350: $reply{'middlename'}.' '.
351: $reply{'lastname'}.' '.
352: $reply{'generation'};
353:
354: if ($target eq 'web') {
355: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
356: return
357: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
358: 'Checked out for '.$plainname.
359: '<br />User: '.$tuname.' at '.$tudom.
360: '<br />ID: '.$idhash{$tuname}.
361: '<br />CourseID: '.$tcrsid.
362: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
363: '<br />DocID: '.$token.
364: '<br />Time: '.localtime().'<hr />';
365: } else {
366: return $token;
367: }
368: }
369:
370: sub fontsettings() {
371: my $headerstring='';
372: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
373: $headerstring.=
374: '<meta Content-Type="text/html; charset=x-mac-roman">';
375: }
376: return $headerstring;
377: }
378:
379: sub printalltags {
380: my $temp;
381: foreach $temp (sort keys %Apache::lonxml::alltags) {
382: &Apache::lonxml::debug("$temp -- ".
383: join(',',@{ $Apache::lonxml::alltags{$temp} }));
384: }
385: }
386:
387: sub xmlparse {
388: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
389:
390: &setup_globals($request,$target);
391: &Apache::inputtags::initialize_inputtags();
392: &Apache::outputtags::initialize_outputtags();
393: &Apache::edit::initialize_edit();
394: #
395: # do we have a course style file?
396: #
397:
398: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
399: my $bodytext=
400: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
401: if ($bodytext) {
402: my $location=&Apache::lonnet::filelocation('',$bodytext);
403: my $styletext=&Apache::lonnet::getfile($location);
404: if ($styletext ne '-1') {
405: %style_for_target = (%style_for_target,
406: &Apache::style::styleparser($target,$styletext));
407: }
408: }
409: }
410:
411: #&printalltags();
412: my @pars = ();
413: my $pwd=$ENV{'request.filename'};
414: $pwd =~ s:/[^/]*$::;
415: &newparser(\@pars,\$content_file_string,$pwd);
416:
417: my $safeeval = new Safe;
418: my $safehole = new Safe::Hole;
419: &init_safespace($target,$safeeval,$safehole,$safeinit);
420: #-------------------- Redefinition of the target in the case of compound target
421:
422: ($target, my @tenta) = split('&&',$target);
423:
424: my @stack = ();
425: my @parstack = ();
426: &initdepth;
427:
428: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
429: $safeeval,\%style_for_target);
430: if ($ENV{'request.uri'}) {
431: &writeallows($ENV{'request.uri'});
432: }
433: if ($Apache::lonxml::counter_changed) { &store_counter() }
434: return $finaloutput;
435: }
436:
437: sub htmlclean {
438: my ($raw,$full)=@_;
439:
440: my $tree = HTML::TreeBuilder->new;
441: $tree->ignore_unknown(0);
442:
443: $tree->parse($raw);
444:
445: my $output= $tree->as_HTML(undef,' ');
446:
447: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
448: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
449: unless ($full) {
450: $output=~s/\<[\/]*(body|head|html)\>//gis;
451: }
452:
453: $tree = $tree->delete;
454:
455: return $output;
456: }
457:
458: sub latex_special_symbols {
459: my ($current_token,$stack,$parstack,$where)=@_;
460: if ($where eq 'header') {
461: $current_token =~ s/(\\|_|\^)/ /g;
462: $current_token =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
463: } else {
464: $current_token=~s/\\ /\\char92 /g;
465: $current_token=~s/\^/\\char94 /g;
466: $current_token=~s/\~/\\char126 /g;
467: $current_token=~s/(&[^a-z\#])/\\$1/g;
468: $current_token=~s/([^&])\#/$1\\#/g;
469: $current_token=~s/(\$|_|{|})/\\$1/g;
470: $current_token=~s/\\char92 /\\texttt{\\char92}/g;
471: $current_token=~s/(>|<)/\$$1\$/g; #more or less
472: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
473: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
474: }
475: return $current_token;
476: }
477:
478: sub inner_xmlparse {
479: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
480: my $finaloutput = '';
481: my $result;
482: my $token;
483: while ( $#$pars > -1 ) {
484: while ($token = $$pars['-1']->get_token) {
485: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
486: if ($metamode<1) {
487: my $text=$token->[1];
488: if ($token->[0] eq 'C' && $target eq 'tex') {
489: $text = '';
490: # $text = '%'.$text."\n";
491: }
492: $result.=$text;
493: }
494: } elsif ($token->[0] eq 'PI') {
495: if ($metamode<1) {
496: $result=$token->[2];
497: }
498: } elsif ($token->[0] eq 'S') {
499: # add tag to stack
500: push (@$stack,$token->[1]);
501: # add parameters list to another stack
502: push (@$parstack,&parstring($token));
503: &increasedepth($token);
504: if ($Apache::lonxml::usestyle &&
505: exists($$style_for_target{$token->[1]})) {
506: $Apache::lonxml::usestyle=0;
507: my $string=$$style_for_target{$token->[1]}.
508: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
509: &Apache::lonxml::newparser($pars,\$string);
510: } else {
511: $result = &callsub("start_$token->[1]", $target, $token, $stack,
512: $parstack, $pars, $safeeval, $style_for_target);
513: }
514: } elsif ($token->[0] eq 'E') {
515: #clear out any tags that didn't end
516: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
517: my $lasttag=$$stack[-1];
518: if ($token->[1] =~ /^$lasttag$/i) {
519: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
520: last;
521: } else {
522: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
523: &end_tag($stack,$parstack,$token);
524: }
525: }
526:
527: if ($Apache::lonxml::usestyle &&
528: exists($$style_for_target{'/'."$token->[1]"})) {
529: $Apache::lonxml::usestyle=0;
530: my $string=$$style_for_target{'/'.$token->[1]}.
531: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
532: &Apache::lonxml::newparser($pars,\$string);
533: } else {
534: $result = &callsub("end_$token->[1]", $target, $token, $stack,
535: $parstack, $pars,$safeeval, $style_for_target);
536: }
537: } else {
538: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
539: }
540: #evaluate variable refs in result
541: if ($result ne "") {
542: if ( $#$parstack > -1 ) {
543: $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
544: } else {
545: $result= &Apache::run::evaluate($result,$safeeval,'');
546: }
547: }
548: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
549: if ($target eq 'tex') {
550: $result=&latex_special_symbols($result,$stack,$parstack);
551: }
552: }
553:
554: # Encode any high ASCII characters
555: if (!$Apache::lonxml::prevent_entity_encode) {
556: $result=&HTML::Entities::encode($result,"\200-\377");
557: }
558: if ($Apache::lonxml::redirection) {
559: $Apache::lonxml::outputstack['-1'] .= $result;
560: } else {
561: $finaloutput.=$result;
562: }
563: $result = '';
564:
565: if ($token->[0] eq 'E') {
566: &end_tag($stack,$parstack,$token);
567: }
568: }
569: if ($#$pars > -1) {
570: pop @$pars;
571: pop @Apache::lonxml::pwd;
572: }
573: }
574:
575: # if ($target eq 'meta') {
576: # $finaloutput.=&endredirection;
577: # }
578:
579:
580: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
581: $finaloutput=&afterburn($finaloutput);
582: }
583: return $finaloutput;
584: }
585:
586: sub callsub {
587: my ($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: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
605: if (($token->[0] eq 'S') && ($target eq 'modified')) {
606: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
607: $parstack,$parser,$safeeval,
608: $style);
609: }
610: if (!$deleted) {
611: if ($space) {
612: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
613: $sub1="$space\:\:$sub";
614: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
615: $parstack,$parser,$safeeval,
616: $style);
617: } else {
618: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
619: if ($metamode <1) {
620: if (defined($token->[4]) && ($metamode < 1)) {
621: $currentstring = $token->[4];
622: } else {
623: $currentstring = $token->[2];
624: }
625: }
626: }
627: # &Apache::lonxml::debug("nodefalt:$nodefault:");
628: if ($currentstring eq '' && $nodefault eq '') {
629: if ($target eq 'edit') {
630: #&Apache::lonxml::debug("doing default edit for $token->[1]");
631: if ($token->[0] eq 'S') {
632: $currentstring = &Apache::edit::tag_start($target,$token);
633: } elsif ($token->[0] eq 'E') {
634: $currentstring = &Apache::edit::tag_end($target,$token);
635: }
636: } elsif ($target eq 'modified') {
637: if ($token->[0] eq 'S') {
638: $currentstring = $token->[4];
639: $currentstring.=&Apache::edit::handle_insert();
640: } elsif ($token->[0] eq 'E') {
641: $currentstring = $token->[2];
642: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
643: } else {
644: $currentstring = $token->[2];
645: }
646: }
647: }
648: }
649: use strict 'refs';
650: }
651: return $currentstring;
652: }
653:
654: sub setup_globals {
655: my ($request,$target)=@_;
656: $Apache::lonxml::request=$request;
657: $Apache::lonxml::registered = 0;
658: $errorcount=0;
659: $warningcount=0;
660: $Apache::lonxml::default_homework_loaded=0;
661: $Apache::lonxml::usestyle=1;
662: &init_counter();
663: @Apache::lonxml::pwd=();
664: @Apache::lonxml::extlinks=();
665: if ($target eq 'meta') {
666: $Apache::lonxml::redirection = 0;
667: $Apache::lonxml::metamode = 1;
668: $Apache::lonxml::evaluate = 1;
669: $Apache::lonxml::import = 0;
670: } elsif ($target eq 'answer') {
671: $Apache::lonxml::redirection = 0;
672: $Apache::lonxml::metamode = 1;
673: $Apache::lonxml::evaluate = 1;
674: $Apache::lonxml::import = 1;
675: } elsif ($target eq 'grade') {
676: &startredirection;
677: $Apache::lonxml::metamode = 0;
678: $Apache::lonxml::evaluate = 1;
679: $Apache::lonxml::import = 1;
680: } elsif ($target eq 'modified') {
681: $Apache::lonxml::redirection = 0;
682: $Apache::lonxml::metamode = 0;
683: $Apache::lonxml::evaluate = 0;
684: $Apache::lonxml::import = 0;
685: } elsif ($target eq 'edit') {
686: $Apache::lonxml::redirection = 0;
687: $Apache::lonxml::metamode = 0;
688: $Apache::lonxml::evaluate = 0;
689: $Apache::lonxml::import = 0;
690: } elsif ($target eq 'analyze') {
691: $Apache::lonxml::redirection = 0;
692: $Apache::lonxml::metamode = 0;
693: $Apache::lonxml::evaluate = 1;
694: $Apache::lonxml::import = 1;
695: } else {
696: $Apache::lonxml::redirection = 0;
697: $Apache::lonxml::metamode = 0;
698: $Apache::lonxml::evaluate = 1;
699: $Apache::lonxml::import = 1;
700: }
701: }
702:
703: sub init_safespace {
704: my ($target,$safeeval,$safehole,$safeinit) = @_;
705: $safeeval->permit("entereval");
706: $safeeval->permit(":base_math");
707: $safeeval->permit("sort");
708: $safeeval->deny(":base_io");
709: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
710: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
711:
712: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
713: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
714: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
715: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
716: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
717: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
718: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
719: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
720: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
721: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
722: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
723: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
724: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
725: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
726: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
727: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
728: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
729: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
730: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
731:
732: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
733: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
734: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
735: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
736: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
737: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
738: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
739: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
740: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
741: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
742: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
743: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
744: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
745: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
746: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
747: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
748: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
749: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
750: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
751: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
752: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
753: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
754:
755: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
756: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
757: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
758: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
759: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
760: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
761:
762: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
763: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
764: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
765: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
766: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
767: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
768: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
769: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
770: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
771: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
772: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
773: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
774: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
775: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
776: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
777: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
778: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
779: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
780: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
781: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
782: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
783:
784: #need to inspect this class of ops
785: # $safeeval->deny(":base_orig");
786: $safeinit .= ';$external::target="'.$target.'";';
787: my $rndseed;
788: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
789: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
790: $safeinit .= ';$external::randomseed='.$rndseed.';';
791: &Apache::run::run($safeinit,$safeeval);
792: }
793:
794: sub default_homework_load {
795: my ($safeeval)=@_;
796: &Apache::lonxml::debug('Loading default_homework');
797: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
798: if ($default == -1) {
799: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
800: } else {
801: &Apache::run::run($default,$safeeval);
802: $Apache::lonxml::default_homework_loaded=1;
803: }
804: }
805:
806: sub startredirection {
807: $Apache::lonxml::redirection++;
808: push (@Apache::lonxml::outputstack, '');
809: }
810:
811: sub endredirection {
812: if (!$Apache::lonxml::redirection) {
813: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
814: return '';
815: }
816: $Apache::lonxml::redirection--;
817: pop @Apache::lonxml::outputstack;
818: }
819:
820: sub end_tag {
821: my ($tagstack,$parstack,$token)=@_;
822: pop(@$tagstack);
823: pop(@$parstack);
824: &decreasedepth($token);
825: }
826:
827: sub initdepth {
828: @Apache::lonxml::depthcounter=();
829: $Apache::lonxml::depth=-1;
830: $Apache::lonxml::olddepth=-1;
831: }
832:
833: sub increasedepth {
834: my ($token) = @_;
835: $Apache::lonxml::depth++;
836: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
837: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
838: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
839: }
840: my $curdepth=join('_',@Apache::lonxml::depthcounter);
841: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
842: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
843: }
844:
845: sub decreasedepth {
846: my ($token) = @_;
847: $Apache::lonxml::depth--;
848: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
849: $#Apache::lonxml::depthcounter--;
850: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
851: }
852: if ( $Apache::lonxml::depth < -1) {
853: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
854: $Apache::lonxml::depth='-1';
855: }
856: my $curdepth=join('_',@Apache::lonxml::depthcounter);
857: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
858: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
859: }
860:
861: sub get_all_text_unbalanced {
862: #there is a copy of this in lonpublisher.pm
863: my($tag,$pars)= @_;
864: my $token;
865: my $result='';
866: $tag='<'.$tag.'>';
867: while ($token = $$pars[-1]->get_token) {
868: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
869: $result.=$token->[1];
870: } elsif ($token->[0] eq 'PI') {
871: $result.=$token->[2];
872: } elsif ($token->[0] eq 'S') {
873: $result.=$token->[4];
874: } elsif ($token->[0] eq 'E') {
875: $result.=$token->[2];
876: }
877: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
878: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
879: &Apache::lonxml::debug('Result is :'.$1);
880: $result=$1;
881: my $redo=$tag.$2;
882: &Apache::lonxml::newparser($pars,\$redo);
883: last;
884: }
885: }
886: return $result
887: }
888:
889: sub increment_counter {
890: $Apache::lonxml::counter++;
891: $Apache::lonxml::counter_changed=1;
892: }
893:
894: sub init_counter {
895: if (defined($ENV{'form.counter'})) {
896: $Apache::lonxml::counter=$ENV{'form.counter'};
897: } else {
898: $Apache::lonxml::counter=1;
899: &store_counter();
900: }
901: $Apache::lonxml::counter_changed=0;
902: }
903:
904: sub store_counter {
905: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
906: return '';
907: }
908:
909: sub get_all_text {
910: my($tag,$pars)= @_;
911: &Apache::lonxml::debug("Got a ".ref($pars));
912: my $gotfullstack=1;
913: if (ref($pars) ne 'ARRAY') {
914: $gotfullstack=0;
915: $pars=[$pars];
916: }
917: my $depth=0;
918: my $token;
919: my $result='';
920: if ( $tag =~ m:^/: ) {
921: my $tag=substr($tag,1);
922: #&Apache::lonxml::debug("have:$tag:");
923: my $top_empty=0;
924: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
925: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
926: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
927: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
928: $result.=$token->[1];
929: } elsif ($token->[0] eq 'PI') {
930: $result.=$token->[2];
931: } elsif ($token->[0] eq 'S') {
932: if ($token->[1] =~ /^$tag$/i) { $depth++; }
933: $result.=$token->[4];
934: } elsif ($token->[0] eq 'E') {
935: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
936: #skip sending back the last end tag
937: if ($depth > -1) { $result.=$token->[2]; } else {
938: $$pars[-1]->unget_token($token);
939: }
940: }
941: }
942: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
943: if (($depth >=0) && ($#$pars > 0) ) {
944: pop(@$pars);
945: pop(@Apache::lonxml::pwd);
946: }
947: }
948: if ($top_empty && $depth >= 0) {
949: #never found the end tag ran out of text, throw error send back blank
950: &error('Never found end tag for <'.$tag.'>');
951: if ($gotfullstack) {
952: my $newstring='</'.$tag.'>'.$result;
953: &Apache::lonxml::newparser($pars,\$newstring);
954: }
955: $result='';
956: }
957: } else {
958: while ($#$pars > -1) {
959: while ($token = $$pars[-1]->get_token) {
960: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
961: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
962: ($token->[0] eq 'D')) {
963: $result.=$token->[1];
964: } elsif ($token->[0] eq 'PI') {
965: $result.=$token->[2];
966: } elsif ($token->[0] eq 'S') {
967: if ( $token->[1] =~ /^$tag$/i) {
968: $$pars[-1]->unget_token($token); last;
969: } else {
970: $result.=$token->[4];
971: }
972: } elsif ($token->[0] eq 'E') {
973: $result.=$token->[2];
974: }
975: }
976: if (($#$pars > 0) ) {
977: pop(@$pars);
978: pop(@Apache::lonxml::pwd);
979: } else { last; }
980: }
981: }
982: if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) {
983: $Apache::lonxml::usestyle=1;
984: }
985: #&Apache::lonxml::debug("Exit:$result:");
986: return $result
987: }
988:
989: sub newparser {
990: my ($parser,$contentref,$dir) = @_;
991: push (@$parser,HTML::LCParser->new($contentref));
992: $$parser['-1']->xml_mode('1');
993: if ( $dir eq '' ) {
994: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
995: } else {
996: push (@Apache::lonxml::pwd, $dir);
997: }
998: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
999: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
1000: }
1001:
1002: sub parstring {
1003: my ($token) = @_;
1004: my $temp='';
1005: foreach (@{$token->[3]}) {
1006: unless ($_=~/\W/) {
1007: my $val=$token->[2]->{$_};
1008: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1009: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1010: $temp .= "my \$$_=\"$val\";"
1011: }
1012: }
1013: return $temp;
1014: }
1015:
1016: sub writeallows {
1017: unless ($#extlinks>=0) { return; }
1018: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1019: if ($ENV{'httpref.'.$thisurl}) {
1020: $thisurl=$ENV{'httpref.'.$thisurl};
1021: }
1022: my $thisdir=$thisurl;
1023: $thisdir=~s/\/[^\/]+$//;
1024: my %httpref=();
1025: foreach (@extlinks) {
1026: $httpref{'httpref.'.
1027: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1028: }
1029: @extlinks=();
1030: &Apache::lonnet::appenv(%httpref);
1031: }
1032:
1033: #
1034: # Afterburner handles anchors, highlights and links
1035: #
1036: sub afterburn {
1037: my $result=shift;
1038: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1039: ['highlight','anchor','link']);
1040: if ($ENV{'form.highlight'}) {
1041: foreach (split(/\,/,$ENV{'form.highlight'})) {
1042: my $anchorname=$_;
1043: my $matchthis=$anchorname;
1044: $matchthis=~s/\_+/\\s\+/g;
1045: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1046: }
1047: }
1048: if ($ENV{'form.link'}) {
1049: foreach (split(/\,/,$ENV{'form.link'})) {
1050: my ($anchorname,$linkurl)=split(/\>/,$_);
1051: my $matchthis=$anchorname;
1052: $matchthis=~s/\_+/\\s\+/g;
1053: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1054: }
1055: }
1056: if ($ENV{'form.anchor'}) {
1057: my $anchorname=$ENV{'form.anchor'};
1058: my $matchthis=$anchorname;
1059: $matchthis=~s/\_+/\\s\+/g;
1060: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1061: $result.=(<<"ENDSCRIPT");
1062: <script type="text/javascript">
1063: document.location.hash='$anchorname';
1064: </script>
1065: ENDSCRIPT
1066: }
1067: return $result;
1068: }
1069:
1070: sub storefile {
1071: my ($file,$contents)=@_;
1072: if (my $fh=Apache::File->new('>'.$file)) {
1073: print $fh $contents;
1074: $fh->close();
1075: } else {
1076: &warning("Unable to save file $file");
1077: }
1078: }
1079:
1080: sub createnewhtml {
1081: my $filecontents=(<<SIMPLECONTENT);
1082: <html>
1083: <head>
1084: <title>
1085: Title of Document Goes Here
1086: </title>
1087: </head>
1088: <body bgcolor="#FFFFFF">
1089:
1090: Body of Document Goes Here
1091:
1092: </body>
1093: </html>
1094: SIMPLECONTENT
1095: return $filecontents;
1096: }
1097:
1098:
1099: sub inserteditinfo {
1100: my ($result,$filecontents)=@_;
1101: $filecontents = &HTML::Entities::encode($filecontents);
1102: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1103: my $xml_help = '<table><tr><td>'.
1104: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
1105: undef,undef,600)
1106: .'</td><td>'.
1107: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
1108: undef,undef,600)
1109: .'</td></tr></table>';
1110: my $buttons=(<<BUTTONS);
1111: <input type="submit" name="attemptclean"
1112: value="Save and then attempt to clean HTML" />
1113: <input type="submit" name="savethisfile" value="Save this" />
1114: <input type="submit" name="viewmode" value="View" />
1115: BUTTONS
1116: my $editfooter=(<<ENDFOOTER);
1117: <hr />
1118: <a name="editsection" />
1119: <form method="post">
1120: $xml_help
1121: <input type="hidden" name="editmode" value="Edit" />
1122: $buttons<br />
1123: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1124: <br />$buttons
1125: <br />
1126: </form>
1127: ENDFOOTER
1128: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1129: $result=~s/(\<\/body\>)/$editfooter/is;
1130: return $result;
1131: }
1132:
1133: sub get_target {
1134: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1135: if ( $ENV{'request.state'} eq 'published') {
1136: if ( defined($ENV{'form.grade_target'})
1137: && ($viewgrades == 'F' )) {
1138: return ($ENV{'form.grade_target'});
1139: } elsif (defined($ENV{'form.grade_target'})) {
1140: if (($ENV{'form.grade_target'} eq 'web') ||
1141: ($ENV{'form.grade_target'} eq 'tex') ) {
1142: return $ENV{'form.grade_target'}
1143: } else {
1144: return 'web';
1145: }
1146: } else {
1147: return 'web';
1148: }
1149: } elsif ($ENV{'request.state'} eq 'construct') {
1150: if ( defined($ENV{'form.grade_target'})) {
1151: return ($ENV{'form.grade_target'});
1152: } else {
1153: return 'web';
1154: }
1155: } else {
1156: return 'web';
1157: }
1158: }
1159:
1160: sub handler {
1161: my $request=shift;
1162:
1163: my $target=&get_target();
1164:
1165: $Apache::lonxml::debug=0;
1166:
1167: if ($ENV{'browser.mathml'}) {
1168: $request->content_type('text/xml');
1169: } else {
1170: $request->content_type('text/html');
1171: }
1172: &Apache::loncommon::no_cache($request);
1173: $request->send_http_header;
1174:
1175: return OK if $request->header_only;
1176:
1177:
1178: my $file=&Apache::lonnet::filelocation("",$request->uri);
1179: #
1180: # Edit action? Save file.
1181: #
1182: unless ($ENV{'request.state'} eq 'published') {
1183: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1184: &storefile($file,$ENV{'form.filecont'});
1185: }
1186: }
1187: my %mystyle;
1188: my $result = '';
1189: my $filecontents=&Apache::lonnet::getfile($file);
1190: if ($filecontents == -1) {
1191: $result=(<<ENDNOTFOUND);
1192: <html>
1193: <head>
1194: <title>File not found</title>
1195: </head>
1196: <body bgcolor="#FFFFFF">
1197: <b>File not found: $file</b>
1198: </body>
1199: </html>
1200: ENDNOTFOUND
1201: $filecontents='';
1202: if ($ENV{'request.state'} ne 'published') {
1203: $filecontents=&createnewhtml();
1204: $ENV{'form.editmode'}='Edit'; #force edit mode
1205: }
1206: } else {
1207: unless ($ENV{'request.state'} eq 'published') {
1208: if ($ENV{'form.attemptclean'}) {
1209: $filecontents=&htmlclean($filecontents,1);
1210: }
1211: }
1212: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1213: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1214: '',%mystyle);
1215: }
1216: }
1217:
1218: #
1219: # Edit action? Insert editing commands
1220: #
1221: unless ($ENV{'request.state'} eq 'published') {
1222: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1223: my $displayfile=$request->uri;
1224: $displayfile=~s/^\/[^\/]*//;
1225: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1226: '</h3></body></html>';
1227: $result=&inserteditinfo($result,$filecontents);
1228: }
1229: }
1230:
1231: writeallows($request->uri);
1232:
1233: $request->print($result);
1234:
1235: return OK;
1236: }
1237:
1238: sub debug {
1239: if ($Apache::lonxml::debug eq 1) {
1240: $|=1;
1241: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1242: }
1243: }
1244:
1245: sub error {
1246: $errorcount++;
1247: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1248: # If printing in construction space, put the error inside <pre></pre>
1249: print "<b>ERROR:</b>".join("\n",@_)."\n";
1250: } else {
1251: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1252: #notify author
1253: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1254: #notify course
1255: if ( $ENV{'request.course.id'} ) {
1256: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1257: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1258: foreach (keys %users) {
1259: my ($user,$domain) = split(/:/, $_);
1260: &Apache::lonmsg::user_normal_msg($user,$domain,
1261: "Error [$declutter]",join('<br />',@_));
1262: }
1263: }
1264:
1265: #FIXME probably shouldn't have me get everything forever.
1266: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1267: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1268: }
1269: }
1270:
1271: sub warning {
1272: $warningcount++;
1273: if ($ENV{'request.state'} eq 'construct') {
1274: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1275: }
1276: }
1277:
1278: sub get_param {
1279: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1280: if ( ! $context ) { $context = -1; }
1281: my $args ='';
1282: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1283: if ( ! $args ) { return undef; }
1284: if ( $case_insensitive ) {
1285: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1286: return &Apache::run::run("{$args;".'return $'.$param.'}',
1287: $safeeval); #'
1288: } else {
1289: return undef;
1290: }
1291: } else {
1292: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1293: return &Apache::run::run("{$args;".'return $'.$param.'}',
1294: $safeeval); #'
1295: } else {
1296: return undef;
1297: }
1298: }
1299: }
1300:
1301: sub get_param_var {
1302: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1303: if ( ! $context ) { $context = -1; }
1304: my $args ='';
1305: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1306: &Apache::lonxml::debug("Args are $args param is $param");
1307: if ($case_insensitive) {
1308: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1309: return undef;
1310: }
1311: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1312: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1313: &Apache::lonxml::debug("first run is $value");
1314: if ($value =~ /^[\$\@\%]\w+$/) {
1315: &Apache::lonxml::debug("doing second");
1316: my @result=&Apache::run::run("return $value",$safeeval,1);
1317: if (!defined($result[0])) {
1318: return $value
1319: } else {
1320: if (wantarray) { return @result; } else { return $result[0]; }
1321: }
1322: } else {
1323: return $value;
1324: }
1325: }
1326:
1327: sub register_insert {
1328: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1329: my $i;
1330: my $tagnum=0;
1331: my @order;
1332: for ($i=0;$i < $#data; $i++) {
1333: my $line = $data[$i];
1334: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1335: if ( $line =~ /TABLE/ ) { last; }
1336: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1337: if ($tag) {
1338: $insertlist{"$tagnum.tag"} = $tag;
1339: $insertlist{"$tagnum.description"} = $descrip;
1340: $insertlist{"$tagnum.color"} = $color;
1341: $insertlist{"$tagnum.function"} = $function;
1342: if (!defined($show)) { $show='yes'; }
1343: $insertlist{"$tagnum.show"}= $show;
1344: $insertlist{"$tag.num"}=$tagnum;
1345: $tagnum++;
1346: }
1347: }
1348: $i++; #skipping TABLE line
1349: $tagnum = 0;
1350: for (;$i < $#data;$i++) {
1351: my $line = $data[$i];
1352: my ($mnemonic,@which) = split(/ +/,$line);
1353: my $tag = $insertlist{"$tagnum.tag"};
1354: for (my $j=0;$j <=$#which;$j++) {
1355: if ( $which[$j] eq 'Y' ) {
1356: if ($insertlist{"$j.show"} ne 'no') {
1357: push(@{ $insertlist{"$tag.which"} },$j);
1358: }
1359: }
1360: }
1361: $tagnum++;
1362: }
1363: }
1364:
1365: sub description {
1366: my ($token)=@_;
1367: my $tagnum;
1368: my $tag=$token->[1];
1369: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1370: my $testtag=$namespace.'::'.$tag;
1371: $tagnum=$insertlist{"$testtag.num"};
1372: if (defined($tagnum)) { last; }
1373: }
1374: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1375: return $insertlist{$tagnum.'.description'};
1376: }
1377:
1378: # ----------------------------------------------------------------- whichuser
1379: # returns a list of $symb, $courseid, $domain, $name that is correct for
1380: # calls to lonnet functions for this setup.
1381: # - looks for form.grade_ parameters
1382: sub whichuser {
1383: my ($symb,$courseid,$domain,$name);
1384: if (defined($ENV{'form.grade_symb'})) {
1385: my $tmp_courseid=$ENV{'form.grade_courseid'};
1386: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1387: if ($allowed) {
1388: $symb=$ENV{'form.grade_symb'};
1389: $courseid=$ENV{'form.grade_courseid'};
1390: $domain=$ENV{'form.grade_domain'};
1391: $name=$ENV{'form.grade_username'};
1392: }
1393: } else {
1394: $symb=&Apache::lonnet::symbread();
1395: $courseid=$ENV{'request.course.id'};
1396: $domain=$ENV{'user.domain'};
1397: $name=$ENV{'user.name'};
1398: }
1399: return ($symb,$courseid,$domain,$name);
1400: }
1401:
1402: 1;
1403: __END__
1404:
1405:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonxml.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / xml