1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.266.2.2 2003/09/27 04:15:26 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 $warningcount);
63: use strict;
64: use HTML::LCParser();
65: use HTML::TreeBuilder();
66: use HTML::Entities();
67: use Safe();
68: use Safe::Hole();
69: use Math::Cephes();
70: use Math::Random();
71: use Opcode();
72:
73:
74: sub register {
75: my ($space,@taglist) = @_;
76: foreach my $temptag (@taglist) {
77: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
78: }
79: }
80:
81: sub deregister {
82: my ($space,@taglist) = @_;
83: foreach my $temptag (@taglist) {
84: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
85: if ($tempspace eq $space) {
86: pop(@{ $Apache::lonxml::alltags{$temptag} });
87: }
88: }
89: #&printalltags();
90: }
91:
92: use Apache::Constants qw(:common);
93: use Apache::lontexconvert();
94: use Apache::style();
95: use Apache::run();
96: use Apache::londefdef();
97: use Apache::scripttag();
98: use Apache::edit();
99: use Apache::inputtags();
100: use Apache::outputtags();
101: use Apache::lonnet();
102: use Apache::File();
103: use Apache::loncommon();
104: use Apache::lonfeedback();
105: use Apache::lonmsg();
106: use Apache::loncacc();
107:
108: #================================================== Main subroutine: xmlparse
109: #debugging control, to turn on debugging modify the correct handler
110: $Apache::lonxml::debug=0;
111:
112: # keeps count of the number of warnings and errors generated in a parse
113: $warningcount=0;
114: $errorcount=0;
115:
116: #path to the directory containing the file currently being processed
117: @pwd=();
118:
119: #these two are used for capturing a subset of the output for later processing,
120: #don't touch them directly use &startredirection and &endredirection
121: @outputstack = ();
122: $redirection = 0;
123:
124: #controls wheter the <import> tag actually does
125: $import = 1;
126: @extlinks=();
127:
128: # meta mode is a bit weird only some output is to be turned off
129: #<output> tag turns metamode off (defined in londefdef.pm)
130: $metamode = 0;
131:
132: # turns on and of run::evaluate actually derefencing var refs
133: $evaluate = 1;
134:
135: # data structure for eidt mode, determines what tags can go into what other tags
136: %insertlist=();
137:
138: # stores the list of active tag namespaces
139: @namespace=();
140:
141: # if 0 all high ASCII characters will be encoded into HTML Entities
142: $prevent_entity_encode=0;
143:
144: # has the dynamic menu been updated to know about this resource
145: $Apache::lonxml::registered=0;
146:
147: # a pointer the the Apache request object
148: $Apache::lonxml::request='';
149:
150: # a problem number counter, and check on ether it is used
151: $Apache::lonxml::counter=1;
152: $Apache::lonxml::counter_changed=0;
153:
154: #internal check on whether to look at style defs
155: $Apache::lonxml::usestyle=1;
156:
157: #locations used to store the parameter string for style substitutions
158: $Apache::lonxml::style_values='';
159: $Apache::lonxml::style_end_values='';
160:
161: #array of ssi calls that need to occur after we are done parsing
162: @Apache::lonxml::ssi_info=();
163:
164: sub xmlbegin {
165: my $output='';
166: if ($ENV{'browser.mathml'}) {
167: $output='<?xml version="1.0"?>'
168: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
169: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
170: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
171: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
172: .'xmlns="http://www.w3.org/TR/REC-html40">';
173: } else {
174: $output='<html>';
175: }
176: return $output;
177: }
178:
179: sub xmlend {
180: my ($discussiononly,$symb)=@_;
181: my $discussion='';
182: if ($ENV{'request.course.id'}) {
183: my $crs='/'.$ENV{'request.course.id'};
184: if ($ENV{'request.course.sec'}) {
185: $crs.='_'.$ENV{'request.course.sec'};
186: }
187: $crs=~s/\_/\//g;
188: my $seeid=&Apache::lonnet::allowed('rin',$crs);
189: unless ($symb) {
190: $symb=&Apache::lonnet::symbread();
191: }
192: if ($symb) {
193: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
194: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
195: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
196: if ($contrib{'version'}) {
197: unless ($discussiononly) {
198: $discussion.=
199: '<address><hr />';
200: }
201: my $idx;
202: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
203: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
204: my $deleted=($contrib{'deleted'}=~/\.$idx\./);
205: unless ((($hidden) && (!$seeid)) || ($deleted)) {
206: my $message=$contrib{$idx.':message'};
207: $message=~s/\n/\<br \/\>/g;
208: $message=&Apache::lontexconvert::msgtexconverted($message);
209: if ($contrib{$idx.':attachmenturl'}) {
210: my ($fname,$ft)
211: =($contrib{$idx.':attachmenturl'}=~/\/(\w+)\.(\w+)$/);
212: $message.='<p>Attachment: <a href="'.
213: &Apache::lonnet::tokenwrapper($contrib{$idx.':attachmenturl'}).
214: '"><tt>'.$fname.'.'.$ft.'</tt></a>';
215: }
216: if ($message) {
217: if ($hidden) {
218: $message='<font color="#888888">'.$message.'</font>';
219: }
220: my $screenname=&Apache::loncommon::screenname(
221: $contrib{$idx.':sendername'},
222: $contrib{$idx.':senderdomain'});
223: my $plainname=&Apache::loncommon::nickname(
224: $contrib{$idx.':sendername'},
225: $contrib{$idx.':senderdomain'});
226:
227: my $sender='Anonymous';
228: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
229: $sender=&Apache::loncommon::aboutmewrapper(
230: $plainname,
231: $contrib{$idx.':sendername'},
232: $contrib{$idx.':senderdomain'}).' ('.
233: $contrib{$idx.':sendername'}.' at '.
234: $contrib{$idx.':senderdomain'}.')';
235: if ($contrib{$idx.':anonymous'}) {
236: $sender.=' [anonymous] '.
237: $screenname;
238: }
239: if ($seeid) {
240: if ($hidden) {
241: $sender.=' <a href="/adm/feedback?unhide='.
242: $symb.':::'.$idx.'">Make Visible</a>';
243: } else {
244: $sender.=' <a href="/adm/feedback?hide='.
245: $symb.':::'.$idx.'">Hide</a>';
246: }
247: $sender.=' <a href="/adm/feedback?deldisc='.
248: $symb.':::'.$idx.'">Delete</a>';
249: }
250: } else {
251: if ($screenname) {
252: $sender='<i>'.$screenname.'</i>';
253: }
254: }
255: $discussion.='<p><b>'.$sender.'</b> ('.
256: localtime($contrib{$idx.':timestamp'}).
257: '):<blockquote>'.$message.
258: '</blockquote></p>';
259: }
260: }
261: }
262: unless ($discussiononly) {
263: $discussion.='</address>';
264: }
265: }
266: if ($discussiononly) {
267: $discussion.=(<<ENDDISCUSS);
268: <form action="/adm/feedback" method="post" name="mailform" enctype="multipart/form-data">
269: <input type="submit" name="discuss" value="Post Discussion" />
270: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
271: <input type="hidden" name="symb" value="$symb" />
272: <input type="hidden" name="sendit" value="true" />
273: <br />
274: <font size="1">Note: in anonymous discussion, your name is visible only to
275: course faculty</font><br />
276: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
277: <p>
278: Attachment (128 KB max size): <input type="file" name="attachment" />
279: </p>
280: </form>
281: ENDDISCUSS
282: $discussion.=&Apache::lonfeedback::generate_preview_button();
283: }
284: }
285: }
286: return $discussion.($discussiononly?'':'</html>');
287: }
288:
289: sub tokeninputfield {
290: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
291: $defhost=~tr/a-z/A-Z/;
292: return (<<ENDINPUTFIELD)
293: <script type="text/javascript">
294: function updatetoken() {
295: var comp=new Array;
296: var barcode=unescape(document.tokeninput.barcode.value);
297: comp=barcode.split('*');
298: if (typeof(comp[0])!="undefined") {
299: document.tokeninput.codeone.value=comp[0];
300: }
301: if (typeof(comp[1])!="undefined") {
302: document.tokeninput.codetwo.value=comp[1];
303: }
304: if (typeof(comp[2])!="undefined") {
305: comp[2]=comp[2].toUpperCase();
306: document.tokeninput.codethree.value=comp[2];
307: }
308: document.tokeninput.barcode.value='';
309: }
310: </script>
311: <form method="post" name="tokeninput">
312: <table border="2" bgcolor="#FFFFBB">
313: <tr><th>DocID Checkin</th></tr>
314: <tr><td>
315: <table>
316: <tr>
317: <td>Scan in Barcode</td>
318: <td><input type="text" size="22" name="barcode"
319: onChange="updatetoken()"/></td>
320: </tr>
321: <tr><td><i>or</i> Type in DocID</td>
322: <td>
323: <input type="text" size="5" name="codeone" />
324: <b><font size="+2">*</font></b>
325: <input type="text" size="5" name="codetwo" />
326: <b><font size="+2">*</font></b>
327: <input type="text" size="10" name="codethree" value="$defhost"
328: onChange="this.value=this.value.toUpperCase()" />
329: </td></tr>
330: </table>
331: </td></tr>
332: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
333: </table>
334: </form>
335: ENDINPUTFIELD
336: }
337:
338: sub maketoken {
339: my ($symb,$tuname,$tudom,$tcrsid)=@_;
340: unless ($symb) {
341: $symb=&Apache::lonnet::symbread();
342: }
343: unless ($tuname) {
344: $tuname=$ENV{'user.name'};
345: $tudom=$ENV{'user.domain'};
346: $tcrsid=$ENV{'request.course.id'};
347: }
348:
349: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
350: }
351:
352: sub printtokenheader {
353: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
354: unless ($token) { return ''; }
355:
356: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
357: unless ($tsymb) {
358: $tsymb=$symb;
359: }
360: unless ($tuname) {
361: $tuname=$name;
362: $tudom=$domain;
363: $tcrsid=$courseid;
364: }
365:
366: my %reply=&Apache::lonnet::get('environment',
367: ['firstname','middlename','lastname','generation'],
368: $tudom,$tuname);
369: my $plainname=$reply{'firstname'}.' '.
370: $reply{'middlename'}.' '.
371: $reply{'lastname'}.' '.
372: $reply{'generation'};
373:
374: if ($target eq 'web') {
375: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
376: return
377: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
378: 'Checked out for '.$plainname.
379: '<br />User: '.$tuname.' at '.$tudom.
380: '<br />ID: '.$idhash{$tuname}.
381: '<br />CourseID: '.$tcrsid.
382: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
383: '<br />DocID: '.$token.
384: '<br />Time: '.localtime().'<hr />';
385: } else {
386: return $token;
387: }
388: }
389:
390: sub fontsettings() {
391: my $headerstring='';
392: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
393: $headerstring.=
394: '<meta Content-Type="text/html; charset=x-mac-roman">';
395: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
396: $headerstring.=
397: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
398: }
399: return $headerstring;
400: }
401:
402: sub printalltags {
403: my $temp;
404: foreach $temp (sort keys %Apache::lonxml::alltags) {
405: &Apache::lonxml::debug("$temp -- ".
406: join(',',@{ $Apache::lonxml::alltags{$temp} }));
407: }
408: }
409:
410: sub xmlparse {
411: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
412:
413: &setup_globals($request,$target);
414: &Apache::inputtags::initialize_inputtags();
415: &Apache::outputtags::initialize_outputtags();
416: &Apache::edit::initialize_edit();
417:
418: #
419: # do we have a course style file?
420: #
421:
422: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
423: my $bodytext=
424: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
425: if ($bodytext) {
426: my $location=&Apache::lonnet::filelocation('',$bodytext);
427: my $styletext=&Apache::lonnet::getfile($location);
428: if ($styletext ne '-1') {
429: %style_for_target = (%style_for_target,
430: &Apache::style::styleparser($target,$styletext));
431: }
432: }
433: }
434: #&printalltags();
435: my @pars = ();
436: my $pwd=$ENV{'request.filename'};
437: $pwd =~ s:/[^/]*$::;
438: &newparser(\@pars,\$content_file_string,$pwd);
439:
440: my $safeeval = new Safe;
441: my $safehole = new Safe::Hole;
442: &init_safespace($target,$safeeval,$safehole,$safeinit);
443: #-------------------- Redefinition of the target in the case of compound target
444:
445: ($target, my @tenta) = split('&&',$target);
446:
447: my @stack = ();
448: my @parstack = ();
449: &initdepth;
450:
451: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
452: $safeeval,\%style_for_target);
453:
454: if ($ENV{'request.uri'}) {
455: &writeallows($ENV{'request.uri'});
456: }
457: &do_registered_ssi();
458: if ($Apache::lonxml::counter_changed) { &store_counter() }
459: return $finaloutput;
460: }
461:
462: sub htmlclean {
463: my ($raw,$full)=@_;
464:
465: my $tree = HTML::TreeBuilder->new;
466: $tree->ignore_unknown(0);
467:
468: $tree->parse($raw);
469:
470: my $output= $tree->as_HTML(undef,' ');
471:
472: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
473: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
474: unless ($full) {
475: $output=~s/\<[\/]*(body|head|html)\>//gis;
476: }
477:
478: $tree = $tree->delete;
479:
480: return $output;
481: }
482:
483: sub latex_special_symbols {
484: my ($current_token,$stack,$parstack,$where)=@_;
485: if ($where eq 'header') {
486: $current_token =~ s/(\\|_|\^)/ /g;
487: $current_token =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
488: } else {
489: $current_token=~s/\\ /\\char92 /g;
490: $current_token=~s/\^/\\char94 /g;
491: $current_token=~s/\~/\\char126 /g;
492: $current_token=~s/(&[^A-Za-z\#])/\\$1/g;
493: $current_token=~s/([^&])\#/$1\\#/g;
494: $current_token=~s/(\$|_|{|})/\\$1/g;
495: $current_token=~s/\\char92 /\\texttt{\\char92}/g;
496: $current_token=~s/(>|<)/\$$1\$/g; #more or less
497: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
498: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
499: }
500: return $current_token;
501: }
502:
503: sub inner_xmlparse {
504: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
505: my $finaloutput = '';
506: my $result;
507: my $token;
508: my $dontpop=0;
509: while ( $#$pars > -1 ) {
510: while ($token = $$pars['-1']->get_token) {
511: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
512: if ($metamode<1) {
513: my $text=$token->[1];
514: if ($token->[0] eq 'C' && $target eq 'tex') {
515: $text = '';
516: # $text = '%'.$text."\n";
517: }
518: $result.=$text;
519: }
520: } elsif (($token->[0] eq 'D')) {
521: if ($metamode<1 && $target eq 'web') {
522: my $text=$token->[1];
523: $result.=$text;
524: }
525: } elsif ($token->[0] eq 'PI') {
526: if ($metamode<1 && $target eq 'web') {
527: $result=$token->[2];
528: }
529: } elsif ($token->[0] eq 'S') {
530: # add tag to stack
531: push (@$stack,$token->[1]);
532: # add parameters list to another stack
533: push (@$parstack,&parstring($token));
534: &increasedepth($token);
535: if ($Apache::lonxml::usestyle &&
536: exists($$style_for_target{$token->[1]})) {
537: $Apache::lonxml::usestyle=0;
538: my $string=$$style_for_target{$token->[1]}.
539: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
540: &Apache::lonxml::newparser($pars,\$string);
541: $Apache::lonxml::style_values=$$parstack[-1];
542: $Apache::lonxml::style_end_values=$$parstack[-1];
543: } else {
544: $result = &callsub("start_$token->[1]", $target, $token, $stack,
545: $parstack, $pars, $safeeval, $style_for_target);
546: }
547: } elsif ($token->[0] eq 'E') {
548: if ($Apache::lonxml::usestyle &&
549: exists($$style_for_target{'/'."$token->[1]"})) {
550: $Apache::lonxml::usestyle=0;
551: my $string=$$style_for_target{'/'.$token->[1]}.
552: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
553: &Apache::lonxml::newparser($pars,\$string);
554: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
555: $Apache::lonxml::style_end_values='';
556: $dontpop=1;
557: } else {
558: #clear out any tags that didn't end
559: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
560: my $lasttag=$$stack[-1];
561: if ($token->[1] =~ /^$lasttag$/i) {
562: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
563: last;
564: } else {
565: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
566: &end_tag($stack,$parstack,$token);
567: }
568: }
569: $result = &callsub("end_$token->[1]", $target, $token, $stack,
570: $parstack, $pars,$safeeval, $style_for_target);
571: }
572: } else {
573: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
574: }
575: #evaluate variable refs in result
576: if ($result ne "") {
577: my $extras;
578: if (!$Apache::lonxml::usestyle) {
579: $extras=$Apache::lonxml::style_values;
580: }
581: if ( $#$parstack > -1 ) {
582: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
583: } else {
584: $result= &Apache::run::evaluate($result,$safeeval,$extras);
585: }
586: }
587: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
588: #Style file definitions should be correct
589: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
590: $result=&latex_special_symbols($result,$stack,$parstack);
591: }
592: }
593:
594: # Encode any high ASCII characters
595: if (!$Apache::lonxml::prevent_entity_encode) {
596: $result=&HTML::Entities::encode($result,"\200-\377");
597: }
598: if ($Apache::lonxml::redirection) {
599: $Apache::lonxml::outputstack['-1'] .= $result;
600: } else {
601: $finaloutput.=$result;
602: }
603: $result = '';
604:
605: if ($token->[0] eq 'E' && !$dontpop) {
606: &end_tag($stack,$parstack,$token);
607: }
608: $dontpop=0;
609: }
610: if ($#$pars > -1) {
611: pop @$pars;
612: pop @Apache::lonxml::pwd;
613: }
614: }
615:
616: # if ($target eq 'meta') {
617: # $finaloutput.=&endredirection;
618: # }
619:
620:
621: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
622: $finaloutput=&afterburn($finaloutput);
623: }
624: return $finaloutput;
625: }
626:
627: sub callsub {
628: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
629: my $currentstring='';
630: my $nodefault;
631: {
632: my $sub1;
633: no strict 'refs';
634: my $tag=$token->[1];
635: # get utterly rid of extended html tags
636: if ($tag=~/^x\-/i) { return ''; }
637: my $space=$Apache::lonxml::alltags{$tag}[-1];
638: if (!$space) {
639: $tag=~tr/A-Z/a-z/;
640: $sub=~tr/A-Z/a-z/;
641: $space=$Apache::lonxml::alltags{$tag}[-1]
642: }
643:
644: my $deleted=0;
645: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
646: if (($token->[0] eq 'S') && ($target eq 'modified')) {
647: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
648: $parstack,$parser,$safeeval,
649: $style);
650: }
651: if (!$deleted) {
652: if ($space) {
653: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
654: $sub1="$space\:\:$sub";
655: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
656: $parstack,$parser,$safeeval,
657: $style);
658: } else {
659: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
660: if ($metamode <1) {
661: if (defined($token->[4]) && ($metamode < 1)) {
662: $currentstring = $token->[4];
663: } else {
664: $currentstring = $token->[2];
665: }
666: }
667: }
668: # &Apache::lonxml::debug("nodefalt:$nodefault:");
669: if ($currentstring eq '' && $nodefault eq '') {
670: if ($target eq 'edit') {
671: #&Apache::lonxml::debug("doing default edit for $token->[1]");
672: if ($token->[0] eq 'S') {
673: $currentstring = &Apache::edit::tag_start($target,$token);
674: } elsif ($token->[0] eq 'E') {
675: $currentstring = &Apache::edit::tag_end($target,$token);
676: }
677: } elsif ($target eq 'modified') {
678: if ($token->[0] eq 'S') {
679: $currentstring = $token->[4];
680: $currentstring.=&Apache::edit::handle_insert();
681: } elsif ($token->[0] eq 'E') {
682: $currentstring = $token->[2];
683: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
684: } else {
685: $currentstring = $token->[2];
686: }
687: }
688: }
689: }
690: use strict 'refs';
691: }
692: return $currentstring;
693: }
694:
695: sub setup_globals {
696: my ($request,$target)=@_;
697: $Apache::lonxml::request=$request;
698: $Apache::lonxml::registered = 0;
699: $errorcount=0;
700: $warningcount=0;
701: $Apache::lonxml::default_homework_loaded=0;
702: $Apache::lonxml::usestyle=1;
703: &init_counter();
704: @Apache::lonxml::pwd=();
705: @Apache::lonxml::extlinks=();
706: @Apache::lonxml::ssi_info=();
707: if ($target eq 'meta') {
708: $Apache::lonxml::redirection = 0;
709: $Apache::lonxml::metamode = 1;
710: $Apache::lonxml::evaluate = 1;
711: $Apache::lonxml::import = 0;
712: } elsif ($target eq 'answer') {
713: $Apache::lonxml::redirection = 0;
714: $Apache::lonxml::metamode = 1;
715: $Apache::lonxml::evaluate = 1;
716: $Apache::lonxml::import = 1;
717: } elsif ($target eq 'grade') {
718: &startredirection;
719: $Apache::lonxml::metamode = 0;
720: $Apache::lonxml::evaluate = 1;
721: $Apache::lonxml::import = 1;
722: } elsif ($target eq 'modified') {
723: $Apache::lonxml::redirection = 0;
724: $Apache::lonxml::metamode = 0;
725: $Apache::lonxml::evaluate = 0;
726: $Apache::lonxml::import = 0;
727: } elsif ($target eq 'edit') {
728: $Apache::lonxml::redirection = 0;
729: $Apache::lonxml::metamode = 0;
730: $Apache::lonxml::evaluate = 0;
731: $Apache::lonxml::import = 0;
732: } elsif ($target eq 'analyze') {
733: $Apache::lonxml::redirection = 0;
734: $Apache::lonxml::metamode = 0;
735: $Apache::lonxml::evaluate = 1;
736: $Apache::lonxml::import = 1;
737: } else {
738: $Apache::lonxml::redirection = 0;
739: $Apache::lonxml::metamode = 0;
740: $Apache::lonxml::evaluate = 1;
741: $Apache::lonxml::import = 1;
742: }
743: }
744:
745: sub init_safespace {
746: my ($target,$safeeval,$safehole,$safeinit) = @_;
747: $safeeval->permit("entereval");
748: $safeeval->permit(":base_math");
749: $safeeval->permit("sort");
750: $safeeval->deny(":base_io");
751: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
752: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
753: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
754:
755: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
756: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
757: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
758: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
759: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
760: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
761: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
762: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
763: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
764: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
765: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
766: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
767: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
768: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
769: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
770: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
771: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
772: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
773: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
774:
775: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
776: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
777: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
778: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
779: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
780: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
781: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
782: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
783: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
784: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
785: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
786: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
787: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
788: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
789: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
790: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
791: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
792: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
793: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
794: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
795: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
796: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
797:
798: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
799: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
800: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
801: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
802: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
803: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
804:
805: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
806: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
807: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
808: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
809: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
810: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
811: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
812: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
813: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
814: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
815: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
816: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
817: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
818: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
819: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
820: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
821: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
822: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
823: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
824: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
825: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
826:
827: #need to inspect this class of ops
828: # $safeeval->deny(":base_orig");
829: $safeinit .= ';$external::target="'.$target.'";';
830: my $rndseed;
831: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
832: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
833: $safeinit .= ';$external::randomseed='.$rndseed.';';
834: &Apache::lonxml::debug("Setting rndseed to $rndseed");
835: &Apache::run::run($safeinit,$safeeval);
836: }
837:
838: sub default_homework_load {
839: my ($safeeval)=@_;
840: &Apache::lonxml::debug('Loading default_homework');
841: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
842: if ($default eq -1) {
843: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
844: } else {
845: &Apache::run::run($default,$safeeval);
846: $Apache::lonxml::default_homework_loaded=1;
847: }
848: }
849:
850: sub startredirection {
851: $Apache::lonxml::redirection++;
852: push (@Apache::lonxml::outputstack, '');
853: }
854:
855: sub endredirection {
856: if (!$Apache::lonxml::redirection) {
857: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
858: return '';
859: }
860: $Apache::lonxml::redirection--;
861: pop @Apache::lonxml::outputstack;
862: }
863:
864: sub end_tag {
865: my ($tagstack,$parstack,$token)=@_;
866: pop(@$tagstack);
867: pop(@$parstack);
868: &decreasedepth($token);
869: }
870:
871: sub initdepth {
872: @Apache::lonxml::depthcounter=();
873: $Apache::lonxml::depth=-1;
874: $Apache::lonxml::olddepth=-1;
875: }
876:
877: sub increasedepth {
878: my ($token) = @_;
879: $Apache::lonxml::depth++;
880: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
881: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
882: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
883: }
884: my $curdepth=join('_',@Apache::lonxml::depthcounter);
885: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
886: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
887: }
888:
889: sub decreasedepth {
890: my ($token) = @_;
891: $Apache::lonxml::depth--;
892: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
893: $#Apache::lonxml::depthcounter--;
894: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
895: }
896: if ( $Apache::lonxml::depth < -1) {
897: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
898: $Apache::lonxml::depth='-1';
899: }
900: my $curdepth=join('_',@Apache::lonxml::depthcounter);
901: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
902: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
903: }
904:
905: sub get_all_text_unbalanced {
906: #there is a copy of this in lonpublisher.pm
907: my($tag,$pars)= @_;
908: my $token;
909: my $result='';
910: $tag='<'.$tag.'>';
911: while ($token = $$pars[-1]->get_token) {
912: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
913: $result.=$token->[1];
914: } elsif ($token->[0] eq 'PI') {
915: $result.=$token->[2];
916: } elsif ($token->[0] eq 'S') {
917: $result.=$token->[4];
918: } elsif ($token->[0] eq 'E') {
919: $result.=$token->[2];
920: }
921: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
922: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
923: &Apache::lonxml::debug('Result is :'.$1);
924: $result=$1;
925: my $redo=$tag.$2;
926: &Apache::lonxml::newparser($pars,\$redo);
927: last;
928: }
929: }
930: return $result
931: }
932:
933: sub increment_counter {
934: my ($increment) = @_;
935: if (defined($increment) && $increment gt 0) {
936: $Apache::lonxml::counter+=$increment;
937: } else {
938: $Apache::lonxml::counter++;
939: }
940: $Apache::lonxml::counter_changed=1;
941: }
942:
943: sub init_counter {
944: if (defined($ENV{'form.counter'})) {
945: $Apache::lonxml::counter=$ENV{'form.counter'};
946: $Apache::lonxml::counter_changed=0;
947: } else {
948: $Apache::lonxml::counter=1;
949: $Apache::lonxml::counter_changed=1;
950: }
951: }
952:
953: sub store_counter {
954: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
955: return '';
956: }
957:
958: sub get_all_text {
959: my($tag,$pars)= @_;
960: &Apache::lonxml::debug("Got a ".ref($pars));
961: my $gotfullstack=1;
962: if (ref($pars) ne 'ARRAY') {
963: $gotfullstack=0;
964: $pars=[$pars];
965: }
966: my $depth=0;
967: my $token;
968: my $result='';
969: if ( $tag =~ m:^/: ) {
970: my $tag=substr($tag,1);
971: #&Apache::lonxml::debug("have:$tag:");
972: my $top_empty=0;
973: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
974: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
975: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
976: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
977: $result.=$token->[1];
978: } elsif ($token->[0] eq 'PI') {
979: $result.=$token->[2];
980: } elsif ($token->[0] eq 'S') {
981: if ($token->[1] =~ /^$tag$/i) { $depth++; }
982: $result.=$token->[4];
983: } elsif ($token->[0] eq 'E') {
984: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
985: #skip sending back the last end tag
986: if ($depth > -1) { $result.=$token->[2]; } else {
987: $$pars[-1]->unget_token($token);
988: }
989: }
990: }
991: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
992: if (($depth >=0) && ($#$pars > 0) ) {
993: pop(@$pars);
994: pop(@Apache::lonxml::pwd);
995: }
996: }
997: if ($top_empty && $depth >= 0) {
998: #never found the end tag ran out of text, throw error send back blank
999: &error('Never found end tag for <'.$tag.'>');
1000: if ($gotfullstack) {
1001: my $newstring='</'.$tag.'>'.$result;
1002: &Apache::lonxml::newparser($pars,\$newstring);
1003: }
1004: $result='';
1005: }
1006: } else {
1007: while ($#$pars > -1) {
1008: while ($token = $$pars[-1]->get_token) {
1009: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1010: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1011: ($token->[0] eq 'D')) {
1012: $result.=$token->[1];
1013: } elsif ($token->[0] eq 'PI') {
1014: $result.=$token->[2];
1015: } elsif ($token->[0] eq 'S') {
1016: if ( $token->[1] =~ /^$tag$/i) {
1017: $$pars[-1]->unget_token($token); last;
1018: } else {
1019: $result.=$token->[4];
1020: }
1021: } elsif ($token->[0] eq 'E') {
1022: $result.=$token->[2];
1023: }
1024: }
1025: if (($#$pars > 0) ) {
1026: pop(@$pars);
1027: pop(@Apache::lonxml::pwd);
1028: } else { last; }
1029: }
1030: }
1031: if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) {
1032: $Apache::lonxml::usestyle=1;
1033: }
1034: #&Apache::lonxml::debug("Exit:$result:");
1035: return $result
1036: }
1037:
1038: sub newparser {
1039: my ($parser,$contentref,$dir) = @_;
1040: push (@$parser,HTML::LCParser->new($contentref));
1041: $$parser['-1']->xml_mode('1');
1042: if ( $dir eq '' ) {
1043: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1044: } else {
1045: push (@Apache::lonxml::pwd, $dir);
1046: }
1047: }
1048:
1049: sub parstring {
1050: my ($token) = @_;
1051: my $temp='';
1052: foreach (@{$token->[3]}) {
1053: unless ($_=~/\W/) {
1054: my $val=$token->[2]->{$_};
1055: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1056: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1057: $temp .= "my \$$_=\"$val\";"
1058: }
1059: }
1060: return $temp;
1061: }
1062:
1063: sub writeallows {
1064: unless ($#extlinks>=0) { return; }
1065: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1066: if ($ENV{'httpref.'.$thisurl}) {
1067: $thisurl=$ENV{'httpref.'.$thisurl};
1068: }
1069: my $thisdir=$thisurl;
1070: $thisdir=~s/\/[^\/]+$//;
1071: my %httpref=();
1072: foreach (@extlinks) {
1073: $httpref{'httpref.'.
1074: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1075: }
1076: @extlinks=();
1077: &Apache::lonnet::appenv(%httpref);
1078: }
1079:
1080: sub register_ssi {
1081: my ($url,%form)=@_;
1082: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1083: return '';
1084: }
1085:
1086: sub do_registered_ssi {
1087: foreach my $info (@Apache::lonxml::ssi_info) {
1088: my %form=%{ $info->{'form'}};
1089: my $url=$info->{'url'};
1090: &Apache::lonnet::ssi($url,%form);
1091: }
1092: }
1093: #
1094: # Afterburner handles anchors, highlights and links
1095: #
1096: sub afterburn {
1097: my $result=shift;
1098: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1099: ['highlight','anchor','link']);
1100: if ($ENV{'form.highlight'}) {
1101: foreach (split(/\,/,$ENV{'form.highlight'})) {
1102: my $anchorname=$_;
1103: my $matchthis=$anchorname;
1104: $matchthis=~s/\_+/\\s\+/g;
1105: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1106: }
1107: }
1108: if ($ENV{'form.link'}) {
1109: foreach (split(/\,/,$ENV{'form.link'})) {
1110: my ($anchorname,$linkurl)=split(/\>/,$_);
1111: my $matchthis=$anchorname;
1112: $matchthis=~s/\_+/\\s\+/g;
1113: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1114: }
1115: }
1116: if ($ENV{'form.anchor'}) {
1117: my $anchorname=$ENV{'form.anchor'};
1118: my $matchthis=$anchorname;
1119: $matchthis=~s/\_+/\\s\+/g;
1120: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1121: $result.=(<<"ENDSCRIPT");
1122: <script type="text/javascript">
1123: document.location.hash='$anchorname';
1124: </script>
1125: ENDSCRIPT
1126: }
1127: return $result;
1128: }
1129:
1130: sub storefile {
1131: my ($file,$contents)=@_;
1132: if (my $fh=Apache::File->new('>'.$file)) {
1133: print $fh $contents;
1134: $fh->close();
1135: } else {
1136: &warning("Unable to save file $file");
1137: }
1138: }
1139:
1140: sub createnewhtml {
1141: my $filecontents=(<<SIMPLECONTENT);
1142: <html>
1143: <head>
1144: <title>
1145: Title of Document Goes Here
1146: </title>
1147: </head>
1148: <body bgcolor="#FFFFFF">
1149:
1150: Body of Document Goes Here
1151:
1152: </body>
1153: </html>
1154: SIMPLECONTENT
1155: return $filecontents;
1156: }
1157:
1158:
1159: sub inserteditinfo {
1160: my ($result,$filecontents)=@_;
1161: $filecontents = &HTML::Entities::encode($filecontents);
1162: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1163: my $xml_help = Apache::loncommon::helpLatexCheatsheet();
1164: my $titledisplay=&display_title();
1165: my $buttons=(<<BUTTONS);
1166: <input type="submit" name="attemptclean"
1167: value="Save and then attempt to clean HTML" />
1168: <input type="submit" name="savethisfile" value="Save this" />
1169: <input type="submit" name="viewmode" value="View" />
1170: BUTTONS
1171: my $editfooter=(<<ENDFOOTER);
1172: <hr />
1173: <a name="editsection" />
1174: <form method="post">
1175: $xml_help
1176: <input type="hidden" name="editmode" value="Edit" />
1177: $buttons<br />
1178: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1179: <br />$buttons
1180: <br />
1181: </form>
1182: $titledisplay
1183: ENDFOOTER
1184: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1185: $result=~s/(\<\/body\>)/$editfooter/is;
1186: return $result;
1187: }
1188:
1189: sub get_target {
1190: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1191: if ( $ENV{'request.state'} eq 'published') {
1192: if ( defined($ENV{'form.grade_target'})
1193: && ($viewgrades == 'F' )) {
1194: return ($ENV{'form.grade_target'});
1195: } elsif (defined($ENV{'form.grade_target'})) {
1196: if (($ENV{'form.grade_target'} eq 'web') ||
1197: ($ENV{'form.grade_target'} eq 'tex') ) {
1198: return $ENV{'form.grade_target'}
1199: } else {
1200: return 'web';
1201: }
1202: } else {
1203: return 'web';
1204: }
1205: } elsif ($ENV{'request.state'} eq 'construct') {
1206: if ( defined($ENV{'form.grade_target'})) {
1207: return ($ENV{'form.grade_target'});
1208: } else {
1209: return 'web';
1210: }
1211: } else {
1212: return 'web';
1213: }
1214: }
1215:
1216: sub handler {
1217: my $request=shift;
1218:
1219: my $target=&get_target();
1220:
1221: $Apache::lonxml::debug=$ENV{'user.debug'};
1222:
1223: if ($ENV{'browser.mathml'}) {
1224: $request->content_type('text/xml');
1225: } else {
1226: $request->content_type('text/html');
1227: }
1228: &Apache::loncommon::no_cache($request);
1229: $request->send_http_header;
1230:
1231: return OK if $request->header_only;
1232:
1233:
1234: my $file=&Apache::lonnet::filelocation("",$request->uri);
1235: #
1236: # Edit action? Save file.
1237: #
1238: unless ($ENV{'request.state'} eq 'published') {
1239: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1240: &storefile($file,$ENV{'form.filecont'});
1241: }
1242: }
1243: my %mystyle;
1244: my $result = '';
1245: my $filecontents=&Apache::lonnet::getfile($file);
1246: if ($filecontents eq -1) {
1247: $result=(<<ENDNOTFOUND);
1248: <html>
1249: <head>
1250: <title>File not found</title>
1251: </head>
1252: <body bgcolor="#FFFFFF">
1253: <b>File not found: $file</b>
1254: </body>
1255: </html>
1256: ENDNOTFOUND
1257: $filecontents='';
1258: if ($ENV{'request.state'} ne 'published') {
1259: $filecontents=&createnewhtml();
1260: $ENV{'form.editmode'}='Edit'; #force edit mode
1261: }
1262: } else {
1263: unless ($ENV{'request.state'} eq 'published') {
1264: if ($ENV{'form.attemptclean'}) {
1265: $filecontents=&htmlclean($filecontents,1);
1266: }
1267: #
1268: # we are in construction space, see if edit mode forced
1269: &Apache::loncommon::get_unprocessed_cgi
1270: ($ENV{'QUERY_STRING'},['editmode']);
1271: }
1272: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1273: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1274: '',%mystyle);
1275: }
1276: }
1277:
1278: #
1279: # Edit action? Insert editing commands
1280: #
1281: unless ($ENV{'request.state'} eq 'published') {
1282: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1283: my $displayfile=$request->uri;
1284: $displayfile=~s/^\/[^\/]*//;
1285: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1286: '</h3></body></html>';
1287: $result=&inserteditinfo($result,$filecontents);
1288: }
1289: }
1290:
1291: writeallows($request->uri);
1292:
1293:
1294: $request->print($result);
1295:
1296: return OK;
1297: }
1298:
1299: sub display_title {
1300: my $result;
1301: if ($ENV{'request.state'} eq 'construct') {
1302: my $title=&Apache::lonnet::gettitle();
1303: if (!defined($title) || $title eq '') {
1304: $title = $ENV{'request.filename'};
1305: $title = substr($title, rindex($title, '/') + 1);
1306: }
1307: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1308: }
1309: return $result;
1310: }
1311:
1312: sub debug {
1313: if ($Apache::lonxml::debug eq 1) {
1314: $|=1;
1315: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1316: }
1317: }
1318:
1319: sub error {
1320: $errorcount++;
1321: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1322: # If printing in construction space, put the error inside <pre></pre>
1323: print "<b>ERROR:</b>".join("\n",@_)."\n";
1324: } else {
1325: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1326: #notify author
1327: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1328: #notify course
1329: if ( $ENV{'request.course.id'} ) {
1330: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1331: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1332: foreach (keys %users) {
1333: my ($user,$domain) = split(/:/, $_);
1334: &Apache::lonmsg::user_normal_msg($user,$domain,
1335: "Error [$declutter]",join('<br />',@_));
1336: }
1337: }
1338:
1339: #FIXME probably shouldn't have me get everything forever.
1340: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1341: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1342: }
1343: }
1344:
1345: sub warning {
1346: $warningcount++;
1347:
1348: if ($ENV{'form.grade_target'} ne 'tex') {
1349: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1350: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1351: }
1352: }
1353: }
1354:
1355: sub get_param {
1356: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1357: if ( ! $context ) { $context = -1; }
1358: my $args ='';
1359: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1360: if ( ! $args ) { return undef; }
1361: if ( $case_insensitive ) {
1362: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1363: return &Apache::run::run("{$args;".'return $'.$param.'}',
1364: $safeeval); #'
1365: } else {
1366: return undef;
1367: }
1368: } else {
1369: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1370: return &Apache::run::run("{$args;".'return $'.$param.'}',
1371: $safeeval); #'
1372: } else {
1373: return undef;
1374: }
1375: }
1376: }
1377:
1378: sub get_param_var {
1379: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1380: if ( ! $context ) { $context = -1; }
1381: my $args ='';
1382: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1383: &Apache::lonxml::debug("Args are $args param is $param");
1384: if ($case_insensitive) {
1385: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1386: return undef;
1387: }
1388: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1389: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1390: &Apache::lonxml::debug("first run is $value");
1391: if ($value =~ /^[\$\@\%]\w+$/) {
1392: &Apache::lonxml::debug("doing second");
1393: my @result=&Apache::run::run("return $value",$safeeval,1);
1394: if (!defined($result[0])) {
1395: return $value
1396: } else {
1397: if (wantarray) { return @result; } else { return $result[0]; }
1398: }
1399: } else {
1400: return $value;
1401: }
1402: }
1403:
1404: sub register_insert {
1405: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1406: my $i;
1407: my $tagnum=0;
1408: my @order;
1409: for ($i=0;$i < $#data; $i++) {
1410: my $line = $data[$i];
1411: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1412: if ( $line =~ /TABLE/ ) { last; }
1413: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1414: if ($tag) {
1415: $insertlist{"$tagnum.tag"} = $tag;
1416: $insertlist{"$tagnum.description"} = $descrip;
1417: $insertlist{"$tagnum.color"} = $color;
1418: $insertlist{"$tagnum.function"} = $function;
1419: if (!defined($show)) { $show='yes'; }
1420: $insertlist{"$tagnum.show"}= $show;
1421: $insertlist{"$tag.num"}=$tagnum;
1422: $tagnum++;
1423: }
1424: }
1425: $i++; #skipping TABLE line
1426: $tagnum = 0;
1427: for (;$i < $#data;$i++) {
1428: my $line = $data[$i];
1429: my ($mnemonic,@which) = split(/ +/,$line);
1430: my $tag = $insertlist{"$tagnum.tag"};
1431: for (my $j=0;$j <=$#which;$j++) {
1432: if ( $which[$j] eq 'Y' ) {
1433: if ($insertlist{"$j.show"} ne 'no') {
1434: push(@{ $insertlist{"$tag.which"} },$j);
1435: }
1436: }
1437: }
1438: $tagnum++;
1439: }
1440: }
1441:
1442: sub description {
1443: my ($token)=@_;
1444: my $tagnum;
1445: my $tag=$token->[1];
1446: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1447: my $testtag=$namespace.'::'.$tag;
1448: $tagnum=$insertlist{"$testtag.num"};
1449: if (defined($tagnum)) { last; }
1450: }
1451: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1452: return $insertlist{$tagnum.'.description'};
1453: }
1454:
1455: # ----------------------------------------------------------------- whichuser
1456: # returns a list of $symb, $courseid, $domain, $name that is correct for
1457: # calls to lonnet functions for this setup.
1458: # - looks for form.grade_ parameters
1459: sub whichuser {
1460: my ($passedsymb)=@_;
1461: my ($symb,$courseid,$domain,$name,$publicuser);
1462: if (defined($ENV{'form.grade_symb'})) {
1463: my $tmp_courseid=$ENV{'form.grade_courseid'};
1464: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1465: if ($allowed) {
1466: $symb=$ENV{'form.grade_symb'};
1467: $courseid=$ENV{'form.grade_courseid'};
1468: $domain=$ENV{'form.grade_domain'};
1469: $name=$ENV{'form.grade_username'};
1470: }
1471: } else {
1472: if (!$passedsymb) {
1473: $symb=&Apache::lonnet::symbread();
1474: } else {
1475: $symb=$passedsymb;
1476: }
1477: $courseid=$ENV{'request.course.id'};
1478: $domain=$ENV{'user.domain'};
1479: $name=$ENV{'user.name'};
1480: if ($name eq 'public' && $domain eq 'public') {
1481: if (!defined($ENV{'form.username'})) {
1482: $ENV{'form.username'}.=time.rand(10000000);
1483: }
1484: $name.=$ENV{'form.username'};
1485: }
1486: }
1487: return ($symb,$courseid,$domain,$name,$publicuser);
1488: }
1489:
1490: 1;
1491: __END__
1492:
1493:
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