1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.226 2003/01/30 22:19:09 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: # 5/10 Scott Harrison
45: # 5/26 Gerd Kortemeyer
46: # 5/27 H. K. Ng
47: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
48: # 6/12,6/13 H. K. Ng
49: # 6/16 Gerd Kortemeyer
50: # 7/27 H. K. Ng
51: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
52: # Guy Albertelli
53: # 9/26 Gerd Kortemeyer
54: # Dec Guy Albertelli
55: # YEAR=2002
56: # 1/1 Gerd Kortemeyer
57: # 1/2 Matthew Hall
58: # 1/3 Gerd Kortemeyer
59: #
60:
61: package Apache::lonxml;
62: use vars
63: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
64: use strict;
65: use HTML::LCParser();
66: use HTML::TreeBuilder();
67: use HTML::Entities();
68: use Safe();
69: use Safe::Hole();
70: use Math::Cephes();
71: use Math::Random();
72: use Opcode();
73:
74: sub register {
75: my ($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::lonnet();
100: use Apache::File();
101: use Apache::loncommon();
102: use Apache::lonfeedback();
103: use Apache::lonmsg();
104: use Apache::loncacc();
105:
106: #================================================== Main subroutine: xmlparse
107: #debugging control, to turn on debugging modify the correct handler
108: $Apache::lonxml::debug=0;
109:
110: # keeps count of the number of warnings and errors generated in a parse
111: $warningcount=0;
112: $errorcount=0;
113:
114: #path to the directory containing the file currently being processed
115: @pwd=();
116:
117: #these two are used for capturing a subset of the output for later processing,
118: #don't touch them directly use &startredirection and &endredirection
119: @outputstack = ();
120: $redirection = 0;
121:
122: #controls wheter the <import> tag actually does
123: $import = 1;
124: @extlinks=();
125:
126: # meta mode is a bit weird only some output is to be turned off
127: #<output> tag turns metamode off (defined in londefdef.pm)
128: $metamode = 0;
129:
130: # turns on and of run::evaluate actually derefencing var refs
131: $evaluate = 1;
132:
133: # data structure for eidt mode, determines what tags can go into what other tags
134: %insertlist=();
135:
136: # stores the list of active tag namespaces
137: @namespace=();
138:
139: # if 0 all high ASCII characters will be encoded into HTML Entities
140: $prevent_entity_encode=0;
141:
142: # has the dynamic menu been updated to know about this resource
143: $Apache::lonxml::registered=0;
144:
145: # a pointer the the Apache request object
146: $Apache::lonxml::request='';
147:
148: # a problem number counter, and check on ether it is used
149: $Apache::lonxml::counter=1;
150: $Apache::lonxml::counter_changed=0;
151:
152: #internal check on whether to look at style defs
153: $Apache::lonxml::usestyle=1;
154:
155: sub xmlbegin {
156: my $output='';
157: if ($ENV{'browser.mathml'}) {
158: $output='<?xml version="1.0"?>'
159: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
160: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
161: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
162: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
163: .'xmlns="http://www.w3.org/TR/REC-html40">';
164: } else {
165: $output='<html>';
166: }
167: return $output;
168: }
169:
170: sub xmlend {
171: my ($discussiononly,$symb)=@_;
172: my $discussion='';
173: if ($ENV{'request.course.id'}) {
174: my $crs='/'.$ENV{'request.course.id'};
175: if ($ENV{'request.course.sec'}) {
176: $crs.='_'.$ENV{'request.course.sec'};
177: }
178: $crs=~s/\_/\//g;
179: my $seeid=&Apache::lonnet::allowed('rin',$crs);
180: unless ($symb) {
181: $symb=&Apache::lonnet::symbread();
182: }
183: if ($symb) {
184: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
185: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
186: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
187: if ($contrib{'version'}) {
188: unless ($discussiononly) {
189: $discussion.=
190: '<address><hr />';
191: }
192: my $idx;
193: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
194: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
195: my $deleted=($contrib{'deleted'}=~/\.$idx\./);
196: unless ((($hidden) && (!$seeid)) || ($deleted)) {
197: my $message=$contrib{$idx.':message'};
198: $message=~s/\n/\<br \/\>/g;
199: $message=&Apache::lontexconvert::msgtexconverted($message);
200: if ($message) {
201: if ($hidden) {
202: $message='<font color="#888888">'.$message.'</font>';
203: }
204: my $screenname=&Apache::loncommon::screenname(
205: $contrib{$idx.':sendername'},
206: $contrib{$idx.':senderdomain'});
207: my $plainname=&Apache::loncommon::nickname(
208: $contrib{$idx.':sendername'},
209: $contrib{$idx.':senderdomain'});
210:
211: my $sender='Anonymous';
212: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
213: $sender=&Apache::loncommon::aboutmewrapper(
214: $plainname,
215: $contrib{$idx.':sendername'},
216: $contrib{$idx.':senderdomain'}).' ('.
217: $contrib{$idx.':sendername'}.' at '.
218: $contrib{$idx.':senderdomain'}.')';
219: if ($contrib{$idx.':anonymous'}) {
220: $sender.=' [anonymous] '.
221: $screenname;
222: }
223: if ($seeid) {
224: if ($hidden) {
225: $sender.=' <a href="/adm/feedback?unhide='.
226: $symb.':::'.$idx.'">Make Visible</a>';
227: } else {
228: $sender.=' <a href="/adm/feedback?hide='.
229: $symb.':::'.$idx.'">Hide</a>';
230: }
231: $sender.=' <a href="/adm/feedback?deldisc='.
232: $symb.':::'.$idx.'">Delete</a>';
233: }
234: } else {
235: if ($screenname) {
236: $sender='<i>'.$screenname.'</i>';
237: }
238: }
239: $discussion.='<p><b>'.$sender.'</b> ('.
240: localtime($contrib{$idx.':timestamp'}).
241: '):<blockquote>'.$message.
242: '</blockquote></p>';
243: }
244: }
245: }
246: unless ($discussiononly) {
247: $discussion.='</address>';
248: }
249: }
250: if ($discussiononly) {
251: $discussion.=(<<ENDDISCUSS);
252: <form action="/adm/feedback" method="post" name="mailform">
253: <input type="submit" name="discuss" value="Post Discussion" />
254: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
255: <input type="hidden" name="symb" value="$symb" />
256: <input type="hidden" name="sendit" value="true" />
257: <br />
258: <font size="1">Note: in anonymous discussion, your name is visible only to
259: course faculty</font><br />
260: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
261: </form>
262: ENDDISCUSS
263: $discussion.=&Apache::lonfeedback::generate_preview_button();
264: }
265: }
266: }
267: return $discussion.($discussiononly?'':'</html>');
268: }
269:
270: sub tokeninputfield {
271: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
272: $defhost=~tr/a-z/A-Z/;
273: return (<<ENDINPUTFIELD)
274: <script type="text/javascript">
275: function updatetoken() {
276: var comp=new Array;
277: var barcode=unescape(document.tokeninput.barcode.value);
278: comp=barcode.split('*');
279: if (typeof(comp[0])!="undefined") {
280: document.tokeninput.codeone.value=comp[0];
281: }
282: if (typeof(comp[1])!="undefined") {
283: document.tokeninput.codetwo.value=comp[1];
284: }
285: if (typeof(comp[2])!="undefined") {
286: comp[2]=comp[2].toUpperCase();
287: document.tokeninput.codethree.value=comp[2];
288: }
289: document.tokeninput.barcode.value='';
290: }
291: </script>
292: <form method="post" name="tokeninput">
293: <table border="2" bgcolor="#FFFFBB">
294: <tr><th>DocID Checkin</th></tr>
295: <tr><td>
296: <table>
297: <tr>
298: <td>Scan in Barcode</td>
299: <td><input type="text" size="22" name="barcode"
300: onChange="updatetoken()"/></td>
301: </tr>
302: <tr><td><i>or</i> Type in DocID</td>
303: <td>
304: <input type="text" size="5" name="codeone" />
305: <b><font size="+2">*</font></b>
306: <input type="text" size="5" name="codetwo" />
307: <b><font size="+2">*</font></b>
308: <input type="text" size="10" name="codethree" value="$defhost"
309: onChange="this.value=this.value.toUpperCase()" />
310: </td></tr>
311: </table>
312: </td></tr>
313: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
314: </table>
315: </form>
316: ENDINPUTFIELD
317: }
318:
319: sub maketoken {
320: my ($symb,$tuname,$tudom,$tcrsid)=@_;
321: unless ($symb) {
322: $symb=&Apache::lonnet::symbread();
323: }
324: unless ($tuname) {
325: $tuname=$ENV{'user.name'};
326: $tudom=$ENV{'user.domain'};
327: $tcrsid=$ENV{'request.course.id'};
328: }
329:
330: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
331: }
332:
333: sub printtokenheader {
334: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
335: unless ($token) { return ''; }
336:
337: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
338: unless ($tsymb) {
339: $tsymb=$symb;
340: }
341: unless ($tuname) {
342: $tuname=$name;
343: $tudom=$domain;
344: $tcrsid=$courseid;
345: }
346:
347: my %reply=&Apache::lonnet::get('environment',
348: ['firstname','middlename','lastname','generation'],
349: $tudom,$tuname);
350: my $plainname=$reply{'firstname'}.' '.
351: $reply{'middlename'}.' '.
352: $reply{'lastname'}.' '.
353: $reply{'generation'};
354:
355: if ($target eq 'web') {
356: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
357: return
358: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
359: 'Checked out for '.$plainname.
360: '<br />User: '.$tuname.' at '.$tudom.
361: '<br />ID: '.$idhash{$tuname}.
362: '<br />CourseID: '.$tcrsid.
363: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
364: '<br />DocID: '.$token.
365: '<br />Time: '.localtime().'<hr />';
366: } else {
367: return $token;
368: }
369: }
370:
371: sub fontsettings() {
372: my $headerstring='';
373: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
374: $headerstring.=
375: '<meta Content-Type="text/html; charset=x-mac-roman">';
376: }
377: return $headerstring;
378: }
379:
380:
381: ##
382: ## switchmenu - modeled on lonmenu::switchmenu, but better.
383: ## Helper function for registerurl
384: ##
385: sub switchmenu {
386: my ($row,$col,$imgsrc,$texttop,$textbot,$action,$description)=@_;
387: return(<<ENDSMENU);
388: menu.switchbutton($row,$col,'$imgsrc','$texttop','$textbot','$action','$description');
389: ENDSMENU
390: }
391:
392: sub registerurl {
393: my $forcereg=shift;
394: my $target = shift;
395: my $result = '';
396:
397: if ($target eq 'edit') {
398: $result .="<script type=\"text/javascrtipt\">\n".
399: "if (typeof menu != 'undefined') {menu.currentURL=null;}\n".
400: &Apache::loncommon::browser_and_searcher_javascript().
401: "\n</script>\n";
402: }
403: if ((($ENV{'request.publicaccess'}) ||
404: (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
405: (!$forcereg)) {
406: return $result.
407: '<script type="text/javascript">function LONCAPAreg(){;} function LONCAPAstale(){}</script>';
408: }
409: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
410: $Apache::lonxml::registered=1;
411: my $reopen=&Apache::lonmenu::reopenmenu();
412: my $newmail='';
413: if (&Apache::lonmsg::newmail()) {
414: $newmail='menu.setstatus("you have","messages");';
415: }
416: my $timesync='menu.syncclock(1000*'.time.');';
417: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
418: my $hwkadd='';
419: if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
420: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
421: $hwkadd.=(<<ENDSUBM);
422: menu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")',
423: 'View user submissions for this assessment resource');
424: ENDSUBM
425: }
426: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
427: $hwkadd.=(<<ENDGRDS);
428: menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")',
429: 'Modify user grades for this assessment resource');
430: ENDGRDS
431: }
432: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
433: $hwkadd.=(<<ENDPARM);
434: menu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")',
435: 'Modify deadlines, etc, for this assessment resource');
436: ENDPARM
437: }
438: }
439: ###
440: ### Determine whether or not to display the 'cstr' button for this
441: ### resource
442: ###
443: my $editbutton = '';
444: if ($ENV{'user.author'}) {
445: if ($ENV{'request.role'}=~/^(ca|au)/) {
446: # Set defaults for authors
447: my ($top,$bottom) = ('con-','struct');
448: my $action = "go('/priv/".$ENV{'user.name'}."');";
449: my $cadom = $ENV{'request.role.domain'};
450: my $caname = $ENV{'user.name'};
451: my $desc = "Enter my resource construction space";
452: # Set defaults for co-authors
453: if ($ENV{'request.role'} =~ /^ca/) {
454: ($cadom,$caname)=($ENV{'request.role'}=~/(\w+)\/(\w+)$/);
455: ($top,$bottom) = ('co con-','struct');
456: $action = 'go("/priv/'.$caname.'");';
457: $desc = "Enter construction space as co-author";
458: }
459: # Check that we are on the correct machine
460: my $home = &Apache::lonnet::homeserver($caname,$cadom);
461: if ($home eq $Apache::lonnet::perlvar{'lonHostID'}) {
462: $editbutton=&switchmenu
463: (6,1,$top,,$bottom,$action,$desc);
464: }
465: }
466: ##
467: ## Determine if user can edit url.
468: ##
469: my $cfile='';
470: my $cfuname='';
471: my $cfudom='';
472: if ($ENV{'request.filename'}) {
473: my $file=&Apache::lonnet::declutter($ENV{'request.filename'});
474: $file=~s/^(\w+)\/(\w+)/\/priv\/$2/;
475: # Chech that the user has permission to edit this resource
476: ($cfuname,$cfudom)=&Apache::loncacc::constructaccess($file,$1);
477: if (defined($cfudom)) {
478: if (&Apache::lonnet::homeserver($cfuname,$cfudom)
479: eq $Apache::lonnet::perlvar{'lonHostID'}) {
480: $cfile=$file;
481: }
482: }
483: }
484: # Finally, turn the button on or off
485: if ($cfile) {
486: $editbutton=&switchmenu
487: (6,1,'cstr.gif','edit','resource',
488: 'go("'.$cfile.'");',"Edit this resource");
489: } elsif ($editbutton eq '') {
490: $editbutton = ' menu.clearbut(6,1);';
491: }
492: }
493: ###
494: ###
495: $result = (<<ENDREGTHIS);
496:
497: <script language="JavaScript">
498: // BEGIN LON-CAPA Internal
499:
500: function LONCAPAreg() {
501: menu=$reopen;
502: menu.clearTimeout(menu.menucltim);
503: $timesync
504: $newmail
505: menu.currentURL=window.location.pathname;
506: menu.reloadURL=window.location.pathname;
507: menu.currentSymb="$ENV{'request.symb'}";
508: menu.reloadSymb="$ENV{'request.symb'}";
509: menu.currentStale=0;
510: menu.clearbut(3,1);
511: menu.switchbutton
512: (6,3,'catalog.gif','catalog','info','catalog_info()','Show catalog information');
513: menu.switchbutton
514: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)','Provide my evaluation of this resource');
515: menu.switchbutton
516: (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)','Provide feedback messages or contribute to the course discussion about this resource');
517: menu.switchbutton
518: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)','Prepare a printable document');
519: menu.switchbutton
520: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)','Go to the previous resource in the course sequence');
521: menu.switchbutton
522: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)','Go to the next resource in the course sequence');
523: menu.switchbutton
524: (9,1,'sbkm.gif','set','bookmark','set_bookmark()','Set a bookmark for this resource');
525: menu.switchbutton
526: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()','Use or edit my bookmark collection');
527: menu.switchbutton
528: (9,3,'anot.gif','anno-','tations','annotate()','Make notes and annotations about this resource');
529: $hwkadd
530: $editbutton
531: }
532:
533: function LONCAPAstale() {
534: menu=$reopen
535: menu.currentStale=1;
536: if (menu.reloadURL!='' && menu.reloadURL!= null) {
537: menu.switchbutton
538: (3,1,'reload.gif','return','location','go(reloadURL)','Return to the last known location in the course sequence');
539: }
540: menu.clearbut(7,1);
541: menu.clearbut(7,2);
542: menu.clearbut(7,3);
543: menu.menucltim=menu.setTimeout(
544: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
545: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3);clearbut(6,1)',
546: 2000);
547:
548: }
549:
550: // END LON-CAPA Internal
551: </script>
552: ENDREGTHIS
553:
554: } else {
555: $result = (<<ENDDONOTREGTHIS);
556:
557: <script language="JavaScript">
558: // BEGIN LON-CAPA Internal
559:
560: function LONCAPAreg() {
561: menu=$reopen
562: $timesync
563: menu.currentStale=1;
564: menu.clearbut(2,1);
565: menu.clearbut(2,3);
566: menu.clearbut(8,1);
567: menu.clearbut(8,2);
568: menu.clearbut(8,3);
569: if (menu.currentURL) {
570: menu.switchbutton
571: (3,1,'reload.gif','return','location','go(currentURL)');
572: } else {
573: menu.clearbut(3,1);
574: }
575: }
576:
577: function LONCAPAstale() {
578: }
579:
580: // END LON-CAPA Internal
581: </script>
582: ENDDONOTREGTHIS
583: }
584: return $result;
585: }
586:
587: sub loadevents() {
588: return 'LONCAPAreg();';
589: }
590:
591: sub unloadevents() {
592: return 'LONCAPAstale();';
593: }
594:
595: sub printalltags {
596: my $temp;
597: foreach $temp (sort keys %Apache::lonxml::alltags) {
598: &Apache::lonxml::debug("$temp -- ".
599: join(',',@{ $Apache::lonxml::alltags{$temp} }));
600: }
601: }
602:
603: sub xmlparse {
604: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
605:
606: &setup_globals($request,$target);
607: #
608: # do we have a course style file?
609: #
610:
611: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
612: my $bodytext=
613: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
614: if ($bodytext) {
615: my $location=&Apache::lonnet::filelocation('',$bodytext);
616: my $styletext=&Apache::lonnet::getfile($location);
617: if ($styletext ne '-1') {
618: %style_for_target = (%style_for_target,
619: &Apache::style::styleparser($target,$styletext));
620: }
621: }
622: }
623:
624: #&printalltags();
625: my @pars = ();
626: my $pwd=$ENV{'request.filename'};
627: $pwd =~ s:/[^/]*$::;
628: &newparser(\@pars,\$content_file_string,$pwd);
629:
630: my $safeeval = new Safe;
631: my $safehole = new Safe::Hole;
632: &init_safespace($target,$safeeval,$safehole,$safeinit);
633: #-------------------- Redefinition of the target in the case of compound target
634:
635: ($target, my @tenta) = split('&&',$target);
636:
637: my @stack = ();
638: my @parstack = ();
639: &initdepth;
640:
641: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
642: $safeeval,\%style_for_target);
643: if ($ENV{'request.uri'}) {
644: &writeallows($ENV{'request.uri'});
645: }
646: if ($Apache::lonxml::counter_changed) { &store_counter() }
647: return $finaloutput;
648: }
649:
650: sub htmlclean {
651: my ($raw,$full)=@_;
652:
653: my $tree = HTML::TreeBuilder->new;
654: $tree->ignore_unknown(0);
655:
656: $tree->parse($raw);
657:
658: my $output= $tree->as_HTML(undef,' ');
659:
660: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
661: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
662: unless ($full) {
663: $output=~s/\<[\/]*(body|head|html)\>//gis;
664: }
665:
666: $tree = $tree->delete;
667:
668: return $output;
669: }
670:
671: sub latex_special_symbols {
672: my ($current_token,$stack,$parstack)=@_;
673: $current_token=~s/\\ /\\char92 /g;
674: $current_token=~s/\^/\\char94 /g;
675: $current_token=~s/\~/\\char126 /g;
676: $current_token=~s/(&[^a-z\#])/\\$1/g;
677: $current_token=~s/([^&])\#/$1\\#/g;
678: $current_token=~s/(\$|_|{|})/\\$1/g;
679: $current_token=~s/\\char92 /\\texttt{\\char92}/g;
680: $current_token=~s/>/\$>\$/g; #more
681: $current_token=~s/</\$<\$/g; #less
682: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
683: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
684: return $current_token;
685: }
686:
687: sub inner_xmlparse {
688: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
689: my $finaloutput = '';
690: my $result;
691: my $token;
692: while ( $#$pars > -1 ) {
693: while ($token = $$pars['-1']->get_token) {
694: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
695: if ($metamode<1) {
696: my $text=$token->[1];
697: if ($token->[0] eq 'C' && $target eq 'tex') {
698: $text = '%'.$text."\n";
699: }
700: $result.=$text;
701: }
702: } elsif ($token->[0] eq 'PI') {
703: if ($metamode<1) {
704: $result=$token->[2];
705: }
706: } elsif ($token->[0] eq 'S') {
707: # add tag to stack
708: push (@$stack,$token->[1]);
709: # add parameters list to another stack
710: push (@$parstack,&parstring($token));
711: &increasedepth($token);
712: if ($Apache::lonxml::usestyle &&
713: exists($$style_for_target{$token->[1]})) {
714: $Apache::lonxml::usestyle=0;
715: my $string=$$style_for_target{$token->[1]}.
716: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
717: &Apache::lonxml::newparser($pars,\$string);
718: } else {
719: $result = &callsub("start_$token->[1]", $target, $token, $stack,
720: $parstack, $pars, $safeeval, $style_for_target);
721: }
722: } elsif ($token->[0] eq 'E') {
723: #clear out any tags that didn't end
724: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
725: my $lasttag=$$stack[-1];
726: if ($token->[1] =~ /^$lasttag$/i) {
727: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
728: last;
729: } else {
730: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
731: &end_tag($stack,$parstack,$token);
732: }
733: }
734:
735: if ($Apache::lonxml::usestyle &&
736: exists($$style_for_target{'/'."$token->[1]"})) {
737: $Apache::lonxml::usestyle=0;
738: my $string=$$style_for_target{'/'.$token->[1]}.
739: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
740: &Apache::lonxml::newparser($pars,\$string);
741: } else {
742: $result = &callsub("end_$token->[1]", $target, $token, $stack,
743: $parstack, $pars,$safeeval, $style_for_target);
744: }
745: } else {
746: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
747: }
748: #evaluate variable refs in result
749: if ($result ne "") {
750: if ( $#$parstack > -1 ) {
751: $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
752: } else {
753: $result= &Apache::run::evaluate($result,$safeeval,'');
754: }
755: }
756: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
757: if ($target eq 'tex') {
758: $result=&latex_special_symbols($result,$stack,$parstack);
759: }
760: }
761:
762: # Encode any high ASCII characters
763: if (!$Apache::lonxml::prevent_entity_encode) {
764: $result=&HTML::Entities::encode($result,"\200-\377");
765: }
766: if ($Apache::lonxml::redirection) {
767: $Apache::lonxml::outputstack['-1'] .= $result;
768: } else {
769: $finaloutput.=$result;
770: }
771: $result = '';
772:
773: if ($token->[0] eq 'E') {
774: &end_tag($stack,$parstack,$token);
775: }
776: }
777: if ($#$pars > -1) {
778: pop @$pars;
779: pop @Apache::lonxml::pwd;
780: }
781: }
782:
783: # if ($target eq 'meta') {
784: # $finaloutput.=&endredirection;
785: # }
786:
787:
788: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
789: $finaloutput=&afterburn($finaloutput);
790: }
791: return $finaloutput;
792: }
793:
794: sub callsub {
795: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
796: my $currentstring='';
797: my $nodefault;
798: {
799: my $sub1;
800: no strict 'refs';
801: my $tag=$token->[1];
802: my $space=$Apache::lonxml::alltags{$tag}[-1];
803: if (!$space) {
804: $tag=~tr/A-Z/a-z/;
805: $sub=~tr/A-Z/a-z/;
806: $space=$Apache::lonxml::alltags{$tag}[-1]
807: }
808:
809: my $deleted=0;
810: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
811: if (($token->[0] eq 'S') && ($target eq 'modified')) {
812: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
813: $parstack,$parser,$safeeval,
814: $style);
815: }
816: if (!$deleted) {
817: if ($space) {
818: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
819: $sub1="$space\:\:$sub";
820: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
821: $parstack,$parser,$safeeval,
822: $style);
823: } else {
824: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
825: if ($metamode <1) {
826: if (defined($token->[4]) && ($metamode < 1)) {
827: $currentstring = $token->[4];
828: } else {
829: $currentstring = $token->[2];
830: }
831: }
832: }
833: # &Apache::lonxml::debug("nodefalt:$nodefault:");
834: if ($currentstring eq '' && $nodefault eq '') {
835: if ($target eq 'edit') {
836: #&Apache::lonxml::debug("doing default edit for $token->[1]");
837: if ($token->[0] eq 'S') {
838: $currentstring = &Apache::edit::tag_start($target,$token);
839: } elsif ($token->[0] eq 'E') {
840: $currentstring = &Apache::edit::tag_end($target,$token);
841: }
842: } elsif ($target eq 'modified') {
843: if ($token->[0] eq 'S') {
844: $currentstring = $token->[4];
845: $currentstring.=&Apache::edit::handle_insert();
846: } elsif ($token->[0] eq 'E') {
847: $currentstring = $token->[2];
848: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
849: } else {
850: $currentstring = $token->[2];
851: }
852: }
853: }
854: }
855: use strict 'refs';
856: }
857: return $currentstring;
858: }
859:
860: sub setup_globals {
861: my ($request,$target)=@_;
862: $Apache::lonxml::request=$request;
863: $Apache::lonxml::registered = 0;
864: $errorcount=0;
865: $warningcount=0;
866: $Apache::lonxml::default_homework_loaded=0;
867: $Apache::lonxml::usestyle=1;
868: &init_counter();
869: @Apache::lonxml::pwd=();
870: @Apache::lonxml::extlinks=();
871: if ($target eq 'meta') {
872: $Apache::lonxml::redirection = 0;
873: $Apache::lonxml::metamode = 1;
874: $Apache::lonxml::evaluate = 1;
875: $Apache::lonxml::import = 0;
876: } elsif ($target eq 'answer') {
877: $Apache::lonxml::redirection = 0;
878: $Apache::lonxml::metamode = 1;
879: $Apache::lonxml::evaluate = 1;
880: $Apache::lonxml::import = 1;
881: } elsif ($target eq 'grade') {
882: &startredirection;
883: $Apache::lonxml::metamode = 0;
884: $Apache::lonxml::evaluate = 1;
885: $Apache::lonxml::import = 1;
886: } elsif ($target eq 'modified') {
887: $Apache::lonxml::redirection = 0;
888: $Apache::lonxml::metamode = 0;
889: $Apache::lonxml::evaluate = 0;
890: $Apache::lonxml::import = 0;
891: } elsif ($target eq 'edit') {
892: $Apache::lonxml::redirection = 0;
893: $Apache::lonxml::metamode = 0;
894: $Apache::lonxml::evaluate = 0;
895: $Apache::lonxml::import = 0;
896: } elsif ($target eq 'analyze') {
897: $Apache::lonxml::redirection = 0;
898: $Apache::lonxml::metamode = 0;
899: $Apache::lonxml::evaluate = 1;
900: $Apache::lonxml::import = 1;
901: } else {
902: $Apache::lonxml::redirection = 0;
903: $Apache::lonxml::metamode = 0;
904: $Apache::lonxml::evaluate = 1;
905: $Apache::lonxml::import = 1;
906: }
907: }
908:
909: sub init_safespace {
910: my ($target,$safeeval,$safehole,$safeinit) = @_;
911: $safeeval->permit("entereval");
912: $safeeval->permit(":base_math");
913: $safeeval->permit("sort");
914: $safeeval->deny(":base_io");
915: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
916: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
917:
918: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
919: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
920: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
921: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
922: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
923: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
924: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
925: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
926: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
927: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
928: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
929: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
930: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
931: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
932: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
933: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
934: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
935: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
936: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
937:
938: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
939: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
940: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
941: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
942: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
943: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
944: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
945: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
946: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
947: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
948: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
949: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
950: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
951: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
952: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
953: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
954: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
955: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
956: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
957: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
958: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
959: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
960:
961: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
962: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
963: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
964: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
965: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
966: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
967:
968: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
969: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
970: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
971: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
972: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
973: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
974: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
975: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
976: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
977: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
978: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
979: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
980: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
981: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
982: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
983: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
984: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
985: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
986: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
987: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
988: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
989:
990: #need to inspect this class of ops
991: # $safeeval->deny(":base_orig");
992: $safeinit .= ';$external::target="'.$target.'";';
993: my $rndseed;
994: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
995: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
996: $safeinit .= ';$external::randomseed='.$rndseed.';';
997: &Apache::run::run($safeinit,$safeeval);
998: }
999:
1000: sub default_homework_load {
1001: my ($safeeval)=@_;
1002: &Apache::lonxml::debug('Loading default_homework');
1003: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1004: if ($default == -1) {
1005: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
1006: } else {
1007: &Apache::run::run($default,$safeeval);
1008: $Apache::lonxml::default_homework_loaded=1;
1009: }
1010: }
1011:
1012: sub startredirection {
1013: $Apache::lonxml::redirection++;
1014: push (@Apache::lonxml::outputstack, '');
1015: }
1016:
1017: sub endredirection {
1018: if (!$Apache::lonxml::redirection) {
1019: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1020: return '';
1021: }
1022: $Apache::lonxml::redirection--;
1023: pop @Apache::lonxml::outputstack;
1024: }
1025:
1026: sub end_tag {
1027: my ($tagstack,$parstack,$token)=@_;
1028: pop(@$tagstack);
1029: pop(@$parstack);
1030: &decreasedepth($token);
1031: }
1032:
1033: sub initdepth {
1034: @Apache::lonxml::depthcounter=();
1035: $Apache::lonxml::depth=-1;
1036: $Apache::lonxml::olddepth=-1;
1037: }
1038:
1039: sub increasedepth {
1040: my ($token) = @_;
1041: $Apache::lonxml::depth++;
1042: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
1043: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
1044: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
1045: }
1046: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1047: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1048: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1049: }
1050:
1051: sub decreasedepth {
1052: my ($token) = @_;
1053: $Apache::lonxml::depth--;
1054: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
1055: $#Apache::lonxml::depthcounter--;
1056: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
1057: }
1058: if ( $Apache::lonxml::depth < -1) {
1059: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
1060: $Apache::lonxml::depth='-1';
1061: }
1062: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1063: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1064: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1065: }
1066:
1067: sub get_all_text_unbalanced {
1068: #there is a copy of this in lonpublisher.pm
1069: my($tag,$pars)= @_;
1070: my $token;
1071: my $result='';
1072: $tag='<'.$tag.'>';
1073: while ($token = $$pars[-1]->get_token) {
1074: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1075: $result.=$token->[1];
1076: } elsif ($token->[0] eq 'PI') {
1077: $result.=$token->[2];
1078: } elsif ($token->[0] eq 'S') {
1079: $result.=$token->[4];
1080: } elsif ($token->[0] eq 'E') {
1081: $result.=$token->[2];
1082: }
1083: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
1084: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1085: &Apache::lonxml::debug('Result is :'.$1);
1086: $result=$1;
1087: my $redo=$tag.$2;
1088: &Apache::lonxml::newparser($pars,\$redo);
1089: last;
1090: }
1091: }
1092: return $result
1093: }
1094:
1095: sub increment_counter {
1096: $Apache::lonxml::counter++;
1097: $Apache::lonxml::counter_changed=1;
1098: }
1099:
1100: sub init_counter {
1101: if (defined($ENV{'form.counter'})) {
1102: $Apache::lonxml::counter=$ENV{'form.counter'};
1103: } elsif (not defined($Apache::lonxml::counter)) {
1104: $Apache::lonxml::counter=1;
1105: &store_counter();
1106: }
1107: $Apache::lonxml::counter_changed=0;
1108: }
1109:
1110: sub store_counter {
1111: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1112: return '';
1113: }
1114:
1115: sub get_all_text {
1116: my($tag,$pars)= @_;
1117: &Apache::lonxml::debug("Got a ".ref($pars));
1118: my $gotfullstack=1;
1119: if (ref($pars) ne 'ARRAY') {
1120: $gotfullstack=0;
1121: $pars=[$pars];
1122: }
1123: my $depth=0;
1124: my $token;
1125: my $result='';
1126: if ( $tag =~ m:^/: ) {
1127: my $tag=substr($tag,1);
1128: #&Apache::lonxml::debug("have:$tag:");
1129: my $top_empty=0;
1130: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1131: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1132: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1133: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1134: $result.=$token->[1];
1135: } elsif ($token->[0] eq 'PI') {
1136: $result.=$token->[2];
1137: } elsif ($token->[0] eq 'S') {
1138: if ($token->[1] =~ /^$tag$/i) { $depth++; }
1139: $result.=$token->[4];
1140: } elsif ($token->[0] eq 'E') {
1141: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
1142: #skip sending back the last end tag
1143: if ($depth > -1) { $result.=$token->[2]; } else {
1144: $$pars[-1]->unget_token($token);
1145: }
1146: }
1147: }
1148: if (($depth >=0) && ($#$pars > 0) ) {
1149: pop(@$pars);
1150: pop(@Apache::lonxml::pwd);
1151: }
1152: if (($depth >=0) && ($#$pars == 0) ) { &debug("here4");$top_empty=1; }
1153: }
1154: if ($top_empty && $depth >= 0) {
1155: #never found the end tag ran out of text, throw error send back blank
1156: &error('Never found end tag for <'.$tag.'>');
1157: if ($gotfullstack) {
1158: my $newstring='</'.$tag.'>'.$result;
1159: &Apache::lonxml::newparser($pars,\$newstring);
1160: }
1161: $result='';
1162: }
1163: } else {
1164: while ($#$pars > -1) {
1165: while ($token = $$pars[-1]->get_token) {
1166: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1167: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1168: ($token->[0] eq 'D')) {
1169: $result.=$token->[1];
1170: } elsif ($token->[0] eq 'PI') {
1171: $result.=$token->[2];
1172: } elsif ($token->[0] eq 'S') {
1173: if ( $token->[1] =~ /^$tag$/i) {
1174: $$pars[-1]->unget_token($token); last;
1175: } else {
1176: $result.=$token->[4];
1177: }
1178: } elsif ($token->[0] eq 'E') {
1179: $result.=$token->[2];
1180: }
1181: }
1182: if (($#$pars > 0) ) {
1183: pop(@$pars);
1184: pop(@Apache::lonxml::pwd);
1185: } else { last; }
1186: }
1187: }
1188: if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) {
1189: $Apache::lonxml::usestyle=1;
1190: }
1191: #&Apache::lonxml::debug("Exit:$result:");
1192: return $result
1193: }
1194:
1195: sub newparser {
1196: my ($parser,$contentref,$dir) = @_;
1197: push (@$parser,HTML::LCParser->new($contentref));
1198: $$parser['-1']->xml_mode('1');
1199: if ( $dir eq '' ) {
1200: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1201: } else {
1202: push (@Apache::lonxml::pwd, $dir);
1203: }
1204: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
1205: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
1206: }
1207:
1208: sub parstring {
1209: my ($token) = @_;
1210: my $temp='';
1211: foreach (@{$token->[3]}) {
1212: unless ($_=~/\W/) {
1213: my $val=$token->[2]->{$_};
1214: $val =~ s/([\%\@\\\"])/\\$1/g;
1215: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1216: $temp .= "my \$$_=\"$val\";"
1217: }
1218: }
1219: return $temp;
1220: }
1221:
1222: sub writeallows {
1223: unless ($#extlinks>=0) { return; }
1224: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1225: if ($ENV{'httpref.'.$thisurl}) {
1226: $thisurl=$ENV{'httpref.'.$thisurl};
1227: }
1228: my $thisdir=$thisurl;
1229: $thisdir=~s/\/[^\/]+$//;
1230: my %httpref=();
1231: foreach (@extlinks) {
1232: $httpref{'httpref.'.
1233: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1234: }
1235: @extlinks=();
1236: &Apache::lonnet::appenv(%httpref);
1237: }
1238:
1239: #
1240: # Afterburner handles anchors, highlights and links
1241: #
1242: sub afterburn {
1243: my $result=shift;
1244: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1245: ['highlight','anchor','link']);
1246: if ($ENV{'form.highlight'}) {
1247: foreach (split(/\,/,$ENV{'form.highlight'})) {
1248: my $anchorname=$_;
1249: my $matchthis=$anchorname;
1250: $matchthis=~s/\_+/\\s\+/g;
1251: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1252: }
1253: }
1254: if ($ENV{'form.link'}) {
1255: foreach (split(/\,/,$ENV{'form.link'})) {
1256: my ($anchorname,$linkurl)=split(/\>/,$_);
1257: my $matchthis=$anchorname;
1258: $matchthis=~s/\_+/\\s\+/g;
1259: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1260: }
1261: }
1262: if ($ENV{'form.anchor'}) {
1263: my $anchorname=$ENV{'form.anchor'};
1264: my $matchthis=$anchorname;
1265: $matchthis=~s/\_+/\\s\+/g;
1266: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1267: $result.=(<<"ENDSCRIPT");
1268: <script type="text/javascript">
1269: document.location.hash='$anchorname';
1270: </script>
1271: ENDSCRIPT
1272: }
1273: return $result;
1274: }
1275:
1276: sub storefile {
1277: my ($file,$contents)=@_;
1278: if (my $fh=Apache::File->new('>'.$file)) {
1279: print $fh $contents;
1280: $fh->close();
1281: } else {
1282: &warning("Unable to save file $file");
1283: }
1284: }
1285:
1286: sub createnewhtml {
1287: my $filecontents=(<<SIMPLECONTENT);
1288: <html>
1289: <head>
1290: <title>
1291: Title of Document Goes Here
1292: </title>
1293: </head>
1294: <body bgcolor="#FFFFFF">
1295:
1296: Body of Document Goes Here
1297:
1298: </body>
1299: </html>
1300: SIMPLECONTENT
1301: return $filecontents;
1302: }
1303:
1304:
1305: sub inserteditinfo {
1306: my ($result,$filecontents)=@_;
1307: $filecontents = &HTML::Entities::encode($filecontents);
1308: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1309: my $buttons=(<<BUTTONS);
1310: <input type="submit" name="attemptclean"
1311: value="Save and then attempt to clean HTML" />
1312: <input type="submit" name="savethisfile" value="Save this" />
1313: <input type="submit" name="viewmode" value="View" />
1314: BUTTONS
1315: my $editfooter=(<<ENDFOOTER);
1316: <hr />
1317: <a name="editsection" />
1318: <form method="post">
1319: <input type="hidden" name="editmode" value="Edit" />
1320: $buttons<br />
1321: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1322: <br />$buttons
1323: <br />
1324: </form>
1325: ENDFOOTER
1326: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1327: $result=~s/(\<\/body\>)/$editfooter/is;
1328: return $result;
1329: }
1330:
1331: sub get_target {
1332: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1333: if ( $ENV{'request.state'} eq 'published') {
1334: if ( defined($ENV{'form.grade_target'})
1335: && ($viewgrades == 'F' )) {
1336: return ($ENV{'form.grade_target'});
1337: } elsif (defined($ENV{'form.grade_target'})) {
1338: if (($ENV{'form.grade_target'} eq 'web') ||
1339: ($ENV{'form.grade_target'} eq 'tex') ) {
1340: return $ENV{'form.grade_target'}
1341: } else {
1342: return 'web';
1343: }
1344: } else {
1345: return 'web';
1346: }
1347: } elsif ($ENV{'request.state'} eq 'construct') {
1348: if ( defined($ENV{'form.grade_target'})) {
1349: return ($ENV{'form.grade_target'});
1350: } else {
1351: return 'web';
1352: }
1353: } else {
1354: return 'web';
1355: }
1356: }
1357:
1358: sub handler {
1359: my $request=shift;
1360:
1361: my $target=&get_target();
1362:
1363: $Apache::lonxml::debug=0;
1364:
1365: if ($ENV{'browser.mathml'}) {
1366: $request->content_type('text/xml');
1367: } else {
1368: $request->content_type('text/html');
1369: }
1370: &Apache::loncommon::no_cache($request);
1371: $request->send_http_header;
1372:
1373: return OK if $request->header_only;
1374:
1375:
1376: my $file=&Apache::lonnet::filelocation("",$request->uri);
1377: #
1378: # Edit action? Save file.
1379: #
1380: unless ($ENV{'request.state'} eq 'published') {
1381: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1382: &storefile($file,$ENV{'form.filecont'});
1383: }
1384: }
1385: my %mystyle;
1386: my $result = '';
1387: my $filecontents=&Apache::lonnet::getfile($file);
1388: if ($filecontents == -1) {
1389: $result=(<<ENDNOTFOUND);
1390: <html>
1391: <head>
1392: <title>File not found</title>
1393: </head>
1394: <body bgcolor="#FFFFFF">
1395: <b>File not found: $file</b>
1396: </body>
1397: </html>
1398: ENDNOTFOUND
1399: $filecontents='';
1400: if ($ENV{'request.state'} ne 'published') {
1401: $filecontents=&createnewhtml();
1402: $ENV{'form.editmode'}='Edit'; #force edit mode
1403: }
1404: } else {
1405: unless ($ENV{'request.state'} eq 'published') {
1406: if ($ENV{'form.attemptclean'}) {
1407: $filecontents=&htmlclean($filecontents,1);
1408: }
1409: }
1410: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1411: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1412: '',%mystyle);
1413: }
1414: }
1415:
1416: #
1417: # Edit action? Insert editing commands
1418: #
1419: unless ($ENV{'request.state'} eq 'published') {
1420: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1421: my $displayfile=$request->uri;
1422: $displayfile=~s/^\/[^\/]*//;
1423: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1424: '</h3></body></html>';
1425: $result=&inserteditinfo($result,$filecontents);
1426: }
1427: }
1428:
1429: writeallows($request->uri);
1430:
1431: $request->print($result);
1432:
1433: return OK;
1434: }
1435:
1436: sub debug {
1437: if ($Apache::lonxml::debug eq 1) {
1438: $|=1;
1439: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1440: }
1441: }
1442:
1443: sub error {
1444: $errorcount++;
1445: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1446: # If printing in construction space, put the error inside <pre></pre>
1447: print "<b>ERROR:</b>".join("\n",@_)."\n";
1448: } else {
1449: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1450: #notify author
1451: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1452: #notify course
1453: if ( $ENV{'request.course.id'} ) {
1454: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1455: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1456: foreach (keys %users) {
1457: my ($user,$domain) = split(/:/, $_);
1458: &Apache::lonmsg::user_normal_msg($user,$domain,
1459: "Error [$declutter]",join('<br />',@_));
1460: }
1461: }
1462:
1463: #FIXME probably shouldn't have me get everything forever.
1464: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1465: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1466: }
1467: }
1468:
1469: sub warning {
1470: $warningcount++;
1471: if ($ENV{'request.state'} eq 'construct') {
1472: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1473: }
1474: }
1475:
1476: sub get_param {
1477: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1478: if ( ! $context ) { $context = -1; }
1479: my $args ='';
1480: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1481: if ( ! $args ) { return undef; }
1482: if ( $case_insensitive ) {
1483: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1484: return &Apache::run::run("{$args;".'return $'.$param.'}',
1485: $safeeval); #'
1486: } else {
1487: return undef;
1488: }
1489: } else {
1490: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1491: return &Apache::run::run("{$args;".'return $'.$param.'}',
1492: $safeeval); #'
1493: } else {
1494: return undef;
1495: }
1496: }
1497: }
1498:
1499: sub get_param_var {
1500: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1501: if ( ! $context ) { $context = -1; }
1502: my $args ='';
1503: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1504: if ($case_insensitive) {
1505: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1506: return undef;
1507: }
1508: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1509: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1510: if ($value =~ /^[\$\@\%]/) {
1511: return &Apache::run::run("return $value",$safeeval,1);
1512: } else {
1513: return $value;
1514: }
1515: }
1516:
1517: sub register_insert {
1518: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1519: my $i;
1520: my $tagnum=0;
1521: my @order;
1522: for ($i=0;$i < $#data; $i++) {
1523: my $line = $data[$i];
1524: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1525: if ( $line =~ /TABLE/ ) { last; }
1526: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1527: if ($tag) {
1528: $insertlist{"$tagnum.tag"} = $tag;
1529: $insertlist{"$tagnum.description"} = $descrip;
1530: $insertlist{"$tagnum.color"} = $color;
1531: $insertlist{"$tagnum.function"} = $function;
1532: if (!defined($show)) { $show='yes'; }
1533: $insertlist{"$tagnum.show"}= $show;
1534: $insertlist{"$tag.num"}=$tagnum;
1535: $tagnum++;
1536: }
1537: }
1538: $i++; #skipping TABLE line
1539: $tagnum = 0;
1540: for (;$i < $#data;$i++) {
1541: my $line = $data[$i];
1542: my ($mnemonic,@which) = split(/ +/,$line);
1543: my $tag = $insertlist{"$tagnum.tag"};
1544: for (my $j=0;$j <=$#which;$j++) {
1545: if ( $which[$j] eq 'Y' ) {
1546: if ($insertlist{"$j.show"} ne 'no') {
1547: push(@{ $insertlist{"$tag.which"} },$j);
1548: }
1549: }
1550: }
1551: $tagnum++;
1552: }
1553: }
1554:
1555: sub description {
1556: my ($token)=@_;
1557: my $tagnum;
1558: my $tag=$token->[1];
1559: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1560: my $testtag=$namespace.'::'.$tag;
1561: $tagnum=$insertlist{"$testtag.num"};
1562: if (defined($tagnum)) { last; }
1563: }
1564: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1565: return $insertlist{$tagnum.'.description'};
1566: }
1567:
1568: # ----------------------------------------------------------------- whichuser
1569: # returns a list of $symb, $courseid, $domain, $name that is correct for
1570: # calls to lonnet functions for this setup.
1571: # - looks for form.grade_ parameters
1572: sub whichuser {
1573: my ($symb,$courseid,$domain,$name);
1574: if (defined($ENV{'form.grade_symb'})) {
1575: my $tmp_courseid=$ENV{'form.grade_courseid'};
1576: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1577: if ($allowed) {
1578: $symb=$ENV{'form.grade_symb'};
1579: $courseid=$ENV{'form.grade_courseid'};
1580: $domain=$ENV{'form.grade_domain'};
1581: $name=$ENV{'form.grade_username'};
1582: }
1583: } else {
1584: $symb=&Apache::lonnet::symbread();
1585: $courseid=$ENV{'request.course.id'};
1586: $domain=$ENV{'user.domain'};
1587: $name=$ENV{'user.name'};
1588: }
1589: return ($symb,$courseid,$domain,$name);
1590: }
1591:
1592: 1;
1593: __END__
1594:
1595:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>