1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.242 2003/03/29 22:50:22 www 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: <p>
261: Attachment (128 KB max size): <input type="file" name="attachment" />
262: </p>
263: </form>
264: ENDDISCUSS
265: $discussion.=&Apache::lonfeedback::generate_preview_button();
266: }
267: }
268: }
269: return $discussion.($discussiononly?'':'</html>');
270: }
271:
272: sub tokeninputfield {
273: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
274: $defhost=~tr/a-z/A-Z/;
275: return (<<ENDINPUTFIELD)
276: <script type="text/javascript">
277: function updatetoken() {
278: var comp=new Array;
279: var barcode=unescape(document.tokeninput.barcode.value);
280: comp=barcode.split('*');
281: if (typeof(comp[0])!="undefined") {
282: document.tokeninput.codeone.value=comp[0];
283: }
284: if (typeof(comp[1])!="undefined") {
285: document.tokeninput.codetwo.value=comp[1];
286: }
287: if (typeof(comp[2])!="undefined") {
288: comp[2]=comp[2].toUpperCase();
289: document.tokeninput.codethree.value=comp[2];
290: }
291: document.tokeninput.barcode.value='';
292: }
293: </script>
294: <form method="post" name="tokeninput">
295: <table border="2" bgcolor="#FFFFBB">
296: <tr><th>DocID Checkin</th></tr>
297: <tr><td>
298: <table>
299: <tr>
300: <td>Scan in Barcode</td>
301: <td><input type="text" size="22" name="barcode"
302: onChange="updatetoken()"/></td>
303: </tr>
304: <tr><td><i>or</i> Type in DocID</td>
305: <td>
306: <input type="text" size="5" name="codeone" />
307: <b><font size="+2">*</font></b>
308: <input type="text" size="5" name="codetwo" />
309: <b><font size="+2">*</font></b>
310: <input type="text" size="10" name="codethree" value="$defhost"
311: onChange="this.value=this.value.toUpperCase()" />
312: </td></tr>
313: </table>
314: </td></tr>
315: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
316: </table>
317: </form>
318: ENDINPUTFIELD
319: }
320:
321: sub maketoken {
322: my ($symb,$tuname,$tudom,$tcrsid)=@_;
323: unless ($symb) {
324: $symb=&Apache::lonnet::symbread();
325: }
326: unless ($tuname) {
327: $tuname=$ENV{'user.name'};
328: $tudom=$ENV{'user.domain'};
329: $tcrsid=$ENV{'request.course.id'};
330: }
331:
332: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
333: }
334:
335: sub printtokenheader {
336: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
337: unless ($token) { return ''; }
338:
339: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
340: unless ($tsymb) {
341: $tsymb=$symb;
342: }
343: unless ($tuname) {
344: $tuname=$name;
345: $tudom=$domain;
346: $tcrsid=$courseid;
347: }
348:
349: my %reply=&Apache::lonnet::get('environment',
350: ['firstname','middlename','lastname','generation'],
351: $tudom,$tuname);
352: my $plainname=$reply{'firstname'}.' '.
353: $reply{'middlename'}.' '.
354: $reply{'lastname'}.' '.
355: $reply{'generation'};
356:
357: if ($target eq 'web') {
358: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
359: return
360: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
361: 'Checked out for '.$plainname.
362: '<br />User: '.$tuname.' at '.$tudom.
363: '<br />ID: '.$idhash{$tuname}.
364: '<br />CourseID: '.$tcrsid.
365: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
366: '<br />DocID: '.$token.
367: '<br />Time: '.localtime().'<hr />';
368: } else {
369: return $token;
370: }
371: }
372:
373: sub fontsettings() {
374: my $headerstring='';
375: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
376: $headerstring.=
377: '<meta Content-Type="text/html; charset=x-mac-roman">';
378: }
379: return $headerstring;
380: }
381:
382: sub printalltags {
383: my $temp;
384: foreach $temp (sort keys %Apache::lonxml::alltags) {
385: &Apache::lonxml::debug("$temp -- ".
386: join(',',@{ $Apache::lonxml::alltags{$temp} }));
387: }
388: }
389:
390: sub xmlparse {
391: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
392:
393: &setup_globals($request,$target);
394: &Apache::inputtags::initialize_inputtags();
395: &Apache::outputtags::initialize_outputtags();
396: &Apache::edit::initialize_edit();
397: #
398: # do we have a course style file?
399: #
400:
401: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
402: my $bodytext=
403: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
404: if ($bodytext) {
405: my $location=&Apache::lonnet::filelocation('',$bodytext);
406: my $styletext=&Apache::lonnet::getfile($location);
407: if ($styletext ne '-1') {
408: %style_for_target = (%style_for_target,
409: &Apache::style::styleparser($target,$styletext));
410: }
411: }
412: }
413:
414: #&printalltags();
415: my @pars = ();
416: my $pwd=$ENV{'request.filename'};
417: $pwd =~ s:/[^/]*$::;
418: &newparser(\@pars,\$content_file_string,$pwd);
419:
420: my $safeeval = new Safe;
421: my $safehole = new Safe::Hole;
422: &init_safespace($target,$safeeval,$safehole,$safeinit);
423: #-------------------- Redefinition of the target in the case of compound target
424:
425: ($target, my @tenta) = split('&&',$target);
426:
427: my @stack = ();
428: my @parstack = ();
429: &initdepth;
430:
431: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
432: $safeeval,\%style_for_target);
433: if ($ENV{'request.uri'}) {
434: &writeallows($ENV{'request.uri'});
435: }
436: if ($Apache::lonxml::counter_changed) { &store_counter() }
437: return $finaloutput;
438: }
439:
440: sub htmlclean {
441: my ($raw,$full)=@_;
442:
443: my $tree = HTML::TreeBuilder->new;
444: $tree->ignore_unknown(0);
445:
446: $tree->parse($raw);
447:
448: my $output= $tree->as_HTML(undef,' ');
449:
450: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
451: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
452: unless ($full) {
453: $output=~s/\<[\/]*(body|head|html)\>//gis;
454: }
455:
456: $tree = $tree->delete;
457:
458: return $output;
459: }
460:
461: sub latex_special_symbols {
462: my ($current_token,$stack,$parstack,$where)=@_;
463: if ($where eq 'header') {
464: $current_token =~ s/(\\|_|\^)/ /g;
465: $current_token =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
466: } else {
467: $current_token=~s/\\ /\\char92 /g;
468: $current_token=~s/\^/\\char94 /g;
469: $current_token=~s/\~/\\char126 /g;
470: $current_token=~s/(&[^a-z\#])/\\$1/g;
471: $current_token=~s/([^&])\#/$1\\#/g;
472: $current_token=~s/(\$|_|{|})/\\$1/g;
473: $current_token=~s/\\char92 /\\texttt{\\char92}/g;
474: $current_token=~s/(>|<)/\$$1\$/g; #more or less
475: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
476: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
477: }
478: return $current_token;
479: }
480:
481: sub inner_xmlparse {
482: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
483: my $finaloutput = '';
484: my $result;
485: my $token;
486: while ( $#$pars > -1 ) {
487: while ($token = $$pars['-1']->get_token) {
488: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
489: if ($metamode<1) {
490: my $text=$token->[1];
491: if ($token->[0] eq 'C' && $target eq 'tex') {
492: $text = '';
493: # $text = '%'.$text."\n";
494: }
495: $result.=$text;
496: }
497: } elsif ($token->[0] eq 'PI') {
498: if ($metamode<1) {
499: $result=$token->[2];
500: }
501: } elsif ($token->[0] eq 'S') {
502: # add tag to stack
503: push (@$stack,$token->[1]);
504: # add parameters list to another stack
505: push (@$parstack,&parstring($token));
506: &increasedepth($token);
507: if ($Apache::lonxml::usestyle &&
508: exists($$style_for_target{$token->[1]})) {
509: $Apache::lonxml::usestyle=0;
510: my $string=$$style_for_target{$token->[1]}.
511: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
512: &Apache::lonxml::newparser($pars,\$string);
513: } else {
514: $result = &callsub("start_$token->[1]", $target, $token, $stack,
515: $parstack, $pars, $safeeval, $style_for_target);
516: }
517: } elsif ($token->[0] eq 'E') {
518: #clear out any tags that didn't end
519: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
520: my $lasttag=$$stack[-1];
521: if ($token->[1] =~ /^$lasttag$/i) {
522: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
523: last;
524: } else {
525: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
526: &end_tag($stack,$parstack,$token);
527: }
528: }
529:
530: if ($Apache::lonxml::usestyle &&
531: exists($$style_for_target{'/'."$token->[1]"})) {
532: $Apache::lonxml::usestyle=0;
533: my $string=$$style_for_target{'/'.$token->[1]}.
534: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
535: &Apache::lonxml::newparser($pars,\$string);
536: } else {
537: $result = &callsub("end_$token->[1]", $target, $token, $stack,
538: $parstack, $pars,$safeeval, $style_for_target);
539: }
540: } else {
541: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
542: }
543: #evaluate variable refs in result
544: if ($result ne "") {
545: if ( $#$parstack > -1 ) {
546: $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
547: } else {
548: $result= &Apache::run::evaluate($result,$safeeval,'');
549: }
550: }
551: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
552: if ($target eq 'tex') {
553: $result=&latex_special_symbols($result,$stack,$parstack);
554: }
555: }
556:
557: # Encode any high ASCII characters
558: if (!$Apache::lonxml::prevent_entity_encode) {
559: $result=&HTML::Entities::encode($result,"\200-\377");
560: }
561: if ($Apache::lonxml::redirection) {
562: $Apache::lonxml::outputstack['-1'] .= $result;
563: } else {
564: $finaloutput.=$result;
565: }
566: $result = '';
567:
568: if ($token->[0] eq 'E') {
569: &end_tag($stack,$parstack,$token);
570: }
571: }
572: if ($#$pars > -1) {
573: pop @$pars;
574: pop @Apache::lonxml::pwd;
575: }
576: }
577:
578: # if ($target eq 'meta') {
579: # $finaloutput.=&endredirection;
580: # }
581:
582:
583: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
584: $finaloutput=&afterburn($finaloutput);
585: }
586: return $finaloutput;
587: }
588:
589: sub callsub {
590: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
591: my $currentstring='';
592: my $nodefault;
593: {
594: my $sub1;
595: no strict 'refs';
596: my $tag=$token->[1];
597: # get utterly rid of extended html tags
598: if ($tag=~/^x\-/i) { return ''; }
599: my $space=$Apache::lonxml::alltags{$tag}[-1];
600: if (!$space) {
601: $tag=~tr/A-Z/a-z/;
602: $sub=~tr/A-Z/a-z/;
603: $space=$Apache::lonxml::alltags{$tag}[-1]
604: }
605:
606: my $deleted=0;
607: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
608: if (($token->[0] eq 'S') && ($target eq 'modified')) {
609: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
610: $parstack,$parser,$safeeval,
611: $style);
612: }
613: if (!$deleted) {
614: if ($space) {
615: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
616: $sub1="$space\:\:$sub";
617: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
618: $parstack,$parser,$safeeval,
619: $style);
620: } else {
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,$token);
638: }
639: } elsif ($target eq 'modified') {
640: if ($token->[0] eq 'S') {
641: $currentstring = $token->[4];
642: $currentstring.=&Apache::edit::handle_insert();
643: } elsif ($token->[0] eq 'E') {
644: $currentstring = $token->[2];
645: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
646: } else {
647: $currentstring = $token->[2];
648: }
649: }
650: }
651: }
652: use strict 'refs';
653: }
654: return $currentstring;
655: }
656:
657: sub setup_globals {
658: my ($request,$target)=@_;
659: $Apache::lonxml::request=$request;
660: $Apache::lonxml::registered = 0;
661: $errorcount=0;
662: $warningcount=0;
663: $Apache::lonxml::default_homework_loaded=0;
664: $Apache::lonxml::usestyle=1;
665: &init_counter();
666: @Apache::lonxml::pwd=();
667: @Apache::lonxml::extlinks=();
668: if ($target eq 'meta') {
669: $Apache::lonxml::redirection = 0;
670: $Apache::lonxml::metamode = 1;
671: $Apache::lonxml::evaluate = 1;
672: $Apache::lonxml::import = 0;
673: } elsif ($target eq 'answer') {
674: $Apache::lonxml::redirection = 0;
675: $Apache::lonxml::metamode = 1;
676: $Apache::lonxml::evaluate = 1;
677: $Apache::lonxml::import = 1;
678: } elsif ($target eq 'grade') {
679: &startredirection;
680: $Apache::lonxml::metamode = 0;
681: $Apache::lonxml::evaluate = 1;
682: $Apache::lonxml::import = 1;
683: } elsif ($target eq 'modified') {
684: $Apache::lonxml::redirection = 0;
685: $Apache::lonxml::metamode = 0;
686: $Apache::lonxml::evaluate = 0;
687: $Apache::lonxml::import = 0;
688: } elsif ($target eq 'edit') {
689: $Apache::lonxml::redirection = 0;
690: $Apache::lonxml::metamode = 0;
691: $Apache::lonxml::evaluate = 0;
692: $Apache::lonxml::import = 0;
693: } elsif ($target eq 'analyze') {
694: $Apache::lonxml::redirection = 0;
695: $Apache::lonxml::metamode = 0;
696: $Apache::lonxml::evaluate = 1;
697: $Apache::lonxml::import = 1;
698: } else {
699: $Apache::lonxml::redirection = 0;
700: $Apache::lonxml::metamode = 0;
701: $Apache::lonxml::evaluate = 1;
702: $Apache::lonxml::import = 1;
703: }
704: }
705:
706: sub init_safespace {
707: my ($target,$safeeval,$safehole,$safeinit) = @_;
708: $safeeval->permit("entereval");
709: $safeeval->permit(":base_math");
710: $safeeval->permit("sort");
711: $safeeval->deny(":base_io");
712: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
713: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
714:
715: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
716: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
717: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
718: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
719: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
720: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
721: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
722: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
723: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
724: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
725: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
726: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
727: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
728: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
729: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
730: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
731: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
732: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
733: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
734:
735: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
736: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
737: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
738: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
739: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
740: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
741: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
742: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
743: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
744: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
745: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
746: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
747: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
748: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
749: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
750: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
751: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
752: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
753: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
754: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
755: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
756: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
757:
758: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
759: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
760: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
761: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
762: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
763: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
764:
765: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
766: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
767: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
768: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
769: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
770: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
771: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
772: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
773: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
774: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
775: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
776: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
777: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
778: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
779: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
780: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
781: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
782: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
783: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
784: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
785: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
786:
787: #need to inspect this class of ops
788: # $safeeval->deny(":base_orig");
789: $safeinit .= ';$external::target="'.$target.'";';
790: my $rndseed;
791: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
792: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
793: $safeinit .= ';$external::randomseed='.$rndseed.';';
794: &Apache::run::run($safeinit,$safeeval);
795: }
796:
797: sub default_homework_load {
798: my ($safeeval)=@_;
799: &Apache::lonxml::debug('Loading default_homework');
800: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
801: if ($default eq -1) {
802: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
803: } else {
804: &Apache::run::run($default,$safeeval);
805: $Apache::lonxml::default_homework_loaded=1;
806: }
807: }
808:
809: sub startredirection {
810: $Apache::lonxml::redirection++;
811: push (@Apache::lonxml::outputstack, '');
812: }
813:
814: sub endredirection {
815: if (!$Apache::lonxml::redirection) {
816: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
817: return '';
818: }
819: $Apache::lonxml::redirection--;
820: pop @Apache::lonxml::outputstack;
821: }
822:
823: sub end_tag {
824: my ($tagstack,$parstack,$token)=@_;
825: pop(@$tagstack);
826: pop(@$parstack);
827: &decreasedepth($token);
828: }
829:
830: sub initdepth {
831: @Apache::lonxml::depthcounter=();
832: $Apache::lonxml::depth=-1;
833: $Apache::lonxml::olddepth=-1;
834: }
835:
836: sub increasedepth {
837: my ($token) = @_;
838: $Apache::lonxml::depth++;
839: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
840: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
841: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
842: }
843: my $curdepth=join('_',@Apache::lonxml::depthcounter);
844: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
845: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
846: }
847:
848: sub decreasedepth {
849: my ($token) = @_;
850: $Apache::lonxml::depth--;
851: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
852: $#Apache::lonxml::depthcounter--;
853: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
854: }
855: if ( $Apache::lonxml::depth < -1) {
856: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
857: $Apache::lonxml::depth='-1';
858: }
859: my $curdepth=join('_',@Apache::lonxml::depthcounter);
860: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
861: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
862: }
863:
864: sub get_all_text_unbalanced {
865: #there is a copy of this in lonpublisher.pm
866: my($tag,$pars)= @_;
867: my $token;
868: my $result='';
869: $tag='<'.$tag.'>';
870: while ($token = $$pars[-1]->get_token) {
871: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
872: $result.=$token->[1];
873: } elsif ($token->[0] eq 'PI') {
874: $result.=$token->[2];
875: } elsif ($token->[0] eq 'S') {
876: $result.=$token->[4];
877: } elsif ($token->[0] eq 'E') {
878: $result.=$token->[2];
879: }
880: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
881: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
882: &Apache::lonxml::debug('Result is :'.$1);
883: $result=$1;
884: my $redo=$tag.$2;
885: &Apache::lonxml::newparser($pars,\$redo);
886: last;
887: }
888: }
889: return $result
890: }
891:
892: sub increment_counter {
893: $Apache::lonxml::counter++;
894: $Apache::lonxml::counter_changed=1;
895: }
896:
897: sub init_counter {
898: if (defined($ENV{'form.counter'})) {
899: $Apache::lonxml::counter=$ENV{'form.counter'};
900: } else {
901: $Apache::lonxml::counter=1;
902: &store_counter();
903: }
904: $Apache::lonxml::counter_changed=0;
905: }
906:
907: sub store_counter {
908: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
909: return '';
910: }
911:
912: sub get_all_text {
913: my($tag,$pars)= @_;
914: &Apache::lonxml::debug("Got a ".ref($pars));
915: my $gotfullstack=1;
916: if (ref($pars) ne 'ARRAY') {
917: $gotfullstack=0;
918: $pars=[$pars];
919: }
920: my $depth=0;
921: my $token;
922: my $result='';
923: if ( $tag =~ m:^/: ) {
924: my $tag=substr($tag,1);
925: #&Apache::lonxml::debug("have:$tag:");
926: my $top_empty=0;
927: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
928: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
929: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
930: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
931: $result.=$token->[1];
932: } elsif ($token->[0] eq 'PI') {
933: $result.=$token->[2];
934: } elsif ($token->[0] eq 'S') {
935: if ($token->[1] =~ /^$tag$/i) { $depth++; }
936: $result.=$token->[4];
937: } elsif ($token->[0] eq 'E') {
938: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
939: #skip sending back the last end tag
940: if ($depth > -1) { $result.=$token->[2]; } else {
941: $$pars[-1]->unget_token($token);
942: }
943: }
944: }
945: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
946: if (($depth >=0) && ($#$pars > 0) ) {
947: pop(@$pars);
948: pop(@Apache::lonxml::pwd);
949: }
950: }
951: if ($top_empty && $depth >= 0) {
952: #never found the end tag ran out of text, throw error send back blank
953: &error('Never found end tag for <'.$tag.'>');
954: if ($gotfullstack) {
955: my $newstring='</'.$tag.'>'.$result;
956: &Apache::lonxml::newparser($pars,\$newstring);
957: }
958: $result='';
959: }
960: } else {
961: while ($#$pars > -1) {
962: while ($token = $$pars[-1]->get_token) {
963: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
964: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
965: ($token->[0] eq 'D')) {
966: $result.=$token->[1];
967: } elsif ($token->[0] eq 'PI') {
968: $result.=$token->[2];
969: } elsif ($token->[0] eq 'S') {
970: if ( $token->[1] =~ /^$tag$/i) {
971: $$pars[-1]->unget_token($token); last;
972: } else {
973: $result.=$token->[4];
974: }
975: } elsif ($token->[0] eq 'E') {
976: $result.=$token->[2];
977: }
978: }
979: if (($#$pars > 0) ) {
980: pop(@$pars);
981: pop(@Apache::lonxml::pwd);
982: } else { last; }
983: }
984: }
985: if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) {
986: $Apache::lonxml::usestyle=1;
987: }
988: #&Apache::lonxml::debug("Exit:$result:");
989: return $result
990: }
991:
992: sub newparser {
993: my ($parser,$contentref,$dir) = @_;
994: push (@$parser,HTML::LCParser->new($contentref));
995: $$parser['-1']->xml_mode('1');
996: if ( $dir eq '' ) {
997: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
998: } else {
999: push (@Apache::lonxml::pwd, $dir);
1000: }
1001: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
1002: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
1003: }
1004:
1005: sub parstring {
1006: my ($token) = @_;
1007: my $temp='';
1008: foreach (@{$token->[3]}) {
1009: unless ($_=~/\W/) {
1010: my $val=$token->[2]->{$_};
1011: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1012: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1013: $temp .= "my \$$_=\"$val\";"
1014: }
1015: }
1016: return $temp;
1017: }
1018:
1019: sub writeallows {
1020: unless ($#extlinks>=0) { return; }
1021: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1022: if ($ENV{'httpref.'.$thisurl}) {
1023: $thisurl=$ENV{'httpref.'.$thisurl};
1024: }
1025: my $thisdir=$thisurl;
1026: $thisdir=~s/\/[^\/]+$//;
1027: my %httpref=();
1028: foreach (@extlinks) {
1029: $httpref{'httpref.'.
1030: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1031: }
1032: @extlinks=();
1033: &Apache::lonnet::appenv(%httpref);
1034: }
1035:
1036: #
1037: # Afterburner handles anchors, highlights and links
1038: #
1039: sub afterburn {
1040: my $result=shift;
1041: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1042: ['highlight','anchor','link']);
1043: if ($ENV{'form.highlight'}) {
1044: foreach (split(/\,/,$ENV{'form.highlight'})) {
1045: my $anchorname=$_;
1046: my $matchthis=$anchorname;
1047: $matchthis=~s/\_+/\\s\+/g;
1048: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1049: }
1050: }
1051: if ($ENV{'form.link'}) {
1052: foreach (split(/\,/,$ENV{'form.link'})) {
1053: my ($anchorname,$linkurl)=split(/\>/,$_);
1054: my $matchthis=$anchorname;
1055: $matchthis=~s/\_+/\\s\+/g;
1056: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1057: }
1058: }
1059: if ($ENV{'form.anchor'}) {
1060: my $anchorname=$ENV{'form.anchor'};
1061: my $matchthis=$anchorname;
1062: $matchthis=~s/\_+/\\s\+/g;
1063: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1064: $result.=(<<"ENDSCRIPT");
1065: <script type="text/javascript">
1066: document.location.hash='$anchorname';
1067: </script>
1068: ENDSCRIPT
1069: }
1070: return $result;
1071: }
1072:
1073: sub storefile {
1074: my ($file,$contents)=@_;
1075: if (my $fh=Apache::File->new('>'.$file)) {
1076: print $fh $contents;
1077: $fh->close();
1078: } else {
1079: &warning("Unable to save file $file");
1080: }
1081: }
1082:
1083: sub createnewhtml {
1084: my $filecontents=(<<SIMPLECONTENT);
1085: <html>
1086: <head>
1087: <title>
1088: Title of Document Goes Here
1089: </title>
1090: </head>
1091: <body bgcolor="#FFFFFF">
1092:
1093: Body of Document Goes Here
1094:
1095: </body>
1096: </html>
1097: SIMPLECONTENT
1098: return $filecontents;
1099: }
1100:
1101:
1102: sub inserteditinfo {
1103: my ($result,$filecontents)=@_;
1104: $filecontents = &HTML::Entities::encode($filecontents);
1105: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1106: my $xml_help = '<table><tr><td>'.
1107: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
1108: undef,undef,600)
1109: .'</td><td>'.
1110: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
1111: undef,undef,600)
1112: .'</td></tr></table>';
1113: my $buttons=(<<BUTTONS);
1114: <input type="submit" name="attemptclean"
1115: value="Save and then attempt to clean HTML" />
1116: <input type="submit" name="savethisfile" value="Save this" />
1117: <input type="submit" name="viewmode" value="View" />
1118: BUTTONS
1119: my $editfooter=(<<ENDFOOTER);
1120: <hr />
1121: <a name="editsection" />
1122: <form method="post">
1123: $xml_help
1124: <input type="hidden" name="editmode" value="Edit" />
1125: $buttons<br />
1126: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1127: <br />$buttons
1128: <br />
1129: </form>
1130: ENDFOOTER
1131: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1132: $result=~s/(\<\/body\>)/$editfooter/is;
1133: return $result;
1134: }
1135:
1136: sub get_target {
1137: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1138: if ( $ENV{'request.state'} eq 'published') {
1139: if ( defined($ENV{'form.grade_target'})
1140: && ($viewgrades == 'F' )) {
1141: return ($ENV{'form.grade_target'});
1142: } elsif (defined($ENV{'form.grade_target'})) {
1143: if (($ENV{'form.grade_target'} eq 'web') ||
1144: ($ENV{'form.grade_target'} eq 'tex') ) {
1145: return $ENV{'form.grade_target'}
1146: } else {
1147: return 'web';
1148: }
1149: } else {
1150: return 'web';
1151: }
1152: } elsif ($ENV{'request.state'} eq 'construct') {
1153: if ( defined($ENV{'form.grade_target'})) {
1154: return ($ENV{'form.grade_target'});
1155: } else {
1156: return 'web';
1157: }
1158: } else {
1159: return 'web';
1160: }
1161: }
1162:
1163: sub handler {
1164: my $request=shift;
1165:
1166: my $target=&get_target();
1167:
1168: $Apache::lonxml::debug=0;
1169:
1170: if ($ENV{'browser.mathml'}) {
1171: $request->content_type('text/xml');
1172: } else {
1173: $request->content_type('text/html');
1174: }
1175: &Apache::loncommon::no_cache($request);
1176: $request->send_http_header;
1177:
1178: return OK if $request->header_only;
1179:
1180:
1181: my $file=&Apache::lonnet::filelocation("",$request->uri);
1182: #
1183: # Edit action? Save file.
1184: #
1185: unless ($ENV{'request.state'} eq 'published') {
1186: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1187: &storefile($file,$ENV{'form.filecont'});
1188: }
1189: }
1190: my %mystyle;
1191: my $result = '';
1192: my $filecontents=&Apache::lonnet::getfile($file);
1193: if ($filecontents eq -1) {
1194: $result=(<<ENDNOTFOUND);
1195: <html>
1196: <head>
1197: <title>File not found</title>
1198: </head>
1199: <body bgcolor="#FFFFFF">
1200: <b>File not found: $file</b>
1201: </body>
1202: </html>
1203: ENDNOTFOUND
1204: $filecontents='';
1205: if ($ENV{'request.state'} ne 'published') {
1206: $filecontents=&createnewhtml();
1207: $ENV{'form.editmode'}='Edit'; #force edit mode
1208: }
1209: } else {
1210: unless ($ENV{'request.state'} eq 'published') {
1211: if ($ENV{'form.attemptclean'}) {
1212: $filecontents=&htmlclean($filecontents,1);
1213: }
1214: }
1215: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1216: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1217: '',%mystyle);
1218: }
1219: }
1220:
1221: #
1222: # Edit action? Insert editing commands
1223: #
1224: unless ($ENV{'request.state'} eq 'published') {
1225: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1226: my $displayfile=$request->uri;
1227: $displayfile=~s/^\/[^\/]*//;
1228: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1229: '</h3></body></html>';
1230: $result=&inserteditinfo($result,$filecontents);
1231: }
1232: }
1233:
1234: writeallows($request->uri);
1235:
1236: $request->print($result);
1237:
1238: return OK;
1239: }
1240:
1241: sub debug {
1242: if ($Apache::lonxml::debug eq 1) {
1243: $|=1;
1244: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1245: }
1246: }
1247:
1248: sub error {
1249: $errorcount++;
1250: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1251: # If printing in construction space, put the error inside <pre></pre>
1252: print "<b>ERROR:</b>".join("\n",@_)."\n";
1253: } else {
1254: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1255: #notify author
1256: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1257: #notify course
1258: if ( $ENV{'request.course.id'} ) {
1259: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1260: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1261: foreach (keys %users) {
1262: my ($user,$domain) = split(/:/, $_);
1263: &Apache::lonmsg::user_normal_msg($user,$domain,
1264: "Error [$declutter]",join('<br />',@_));
1265: }
1266: }
1267:
1268: #FIXME probably shouldn't have me get everything forever.
1269: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1270: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1271: }
1272: }
1273:
1274: sub warning {
1275: $warningcount++;
1276: if ($ENV{'request.state'} eq 'construct') {
1277: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1278: }
1279: }
1280:
1281: sub get_param {
1282: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1283: if ( ! $context ) { $context = -1; }
1284: my $args ='';
1285: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1286: if ( ! $args ) { return undef; }
1287: if ( $case_insensitive ) {
1288: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1289: return &Apache::run::run("{$args;".'return $'.$param.'}',
1290: $safeeval); #'
1291: } else {
1292: return undef;
1293: }
1294: } else {
1295: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1296: return &Apache::run::run("{$args;".'return $'.$param.'}',
1297: $safeeval); #'
1298: } else {
1299: return undef;
1300: }
1301: }
1302: }
1303:
1304: sub get_param_var {
1305: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1306: if ( ! $context ) { $context = -1; }
1307: my $args ='';
1308: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1309: &Apache::lonxml::debug("Args are $args param is $param");
1310: if ($case_insensitive) {
1311: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1312: return undef;
1313: }
1314: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1315: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1316: &Apache::lonxml::debug("first run is $value");
1317: if ($value =~ /^[\$\@\%]\w+$/) {
1318: &Apache::lonxml::debug("doing second");
1319: my @result=&Apache::run::run("return $value",$safeeval,1);
1320: if (!defined($result[0])) {
1321: return $value
1322: } else {
1323: if (wantarray) { return @result; } else { return $result[0]; }
1324: }
1325: } else {
1326: return $value;
1327: }
1328: }
1329:
1330: sub register_insert {
1331: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1332: my $i;
1333: my $tagnum=0;
1334: my @order;
1335: for ($i=0;$i < $#data; $i++) {
1336: my $line = $data[$i];
1337: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1338: if ( $line =~ /TABLE/ ) { last; }
1339: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1340: if ($tag) {
1341: $insertlist{"$tagnum.tag"} = $tag;
1342: $insertlist{"$tagnum.description"} = $descrip;
1343: $insertlist{"$tagnum.color"} = $color;
1344: $insertlist{"$tagnum.function"} = $function;
1345: if (!defined($show)) { $show='yes'; }
1346: $insertlist{"$tagnum.show"}= $show;
1347: $insertlist{"$tag.num"}=$tagnum;
1348: $tagnum++;
1349: }
1350: }
1351: $i++; #skipping TABLE line
1352: $tagnum = 0;
1353: for (;$i < $#data;$i++) {
1354: my $line = $data[$i];
1355: my ($mnemonic,@which) = split(/ +/,$line);
1356: my $tag = $insertlist{"$tagnum.tag"};
1357: for (my $j=0;$j <=$#which;$j++) {
1358: if ( $which[$j] eq 'Y' ) {
1359: if ($insertlist{"$j.show"} ne 'no') {
1360: push(@{ $insertlist{"$tag.which"} },$j);
1361: }
1362: }
1363: }
1364: $tagnum++;
1365: }
1366: }
1367:
1368: sub description {
1369: my ($token)=@_;
1370: my $tagnum;
1371: my $tag=$token->[1];
1372: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1373: my $testtag=$namespace.'::'.$tag;
1374: $tagnum=$insertlist{"$testtag.num"};
1375: if (defined($tagnum)) { last; }
1376: }
1377: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1378: return $insertlist{$tagnum.'.description'};
1379: }
1380:
1381: # ----------------------------------------------------------------- whichuser
1382: # returns a list of $symb, $courseid, $domain, $name that is correct for
1383: # calls to lonnet functions for this setup.
1384: # - looks for form.grade_ parameters
1385: sub whichuser {
1386: my ($symb,$courseid,$domain,$name);
1387: if (defined($ENV{'form.grade_symb'})) {
1388: my $tmp_courseid=$ENV{'form.grade_courseid'};
1389: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1390: if ($allowed) {
1391: $symb=$ENV{'form.grade_symb'};
1392: $courseid=$ENV{'form.grade_courseid'};
1393: $domain=$ENV{'form.grade_domain'};
1394: $name=$ENV{'form.grade_username'};
1395: }
1396: } else {
1397: $symb=&Apache::lonnet::symbread();
1398: $courseid=$ENV{'request.course.id'};
1399: $domain=$ENV{'user.domain'};
1400: $name=$ENV{'user.name'};
1401: }
1402: return ($symb,$courseid,$domain,$name);
1403: }
1404:
1405: 1;
1406: __END__
1407:
1408:
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