1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.233 2003/02/14 15:14:37 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39: # last modified 06/26/00 by Alexander Sakharuk
40: # 11/6 Gerd Kortemeyer
41: # 6/1/1 Gerd Kortemeyer
42: # 2/21,3/13 Guy
43: # 3/29,5/4 Gerd Kortemeyer
44: # 5/26 Gerd Kortemeyer
45: # 5/27 H. K. Ng
46: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
47: # 6/12,6/13 H. K. Ng
48: # 6/16 Gerd Kortemeyer
49: # 7/27 H. K. Ng
50: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
51: # Guy Albertelli
52: # 9/26 Gerd Kortemeyer
53: # Dec Guy Albertelli
54: # YEAR=2002
55: # 1/1 Gerd Kortemeyer
56: # 1/2 Matthew Hall
57: # 1/3 Gerd Kortemeyer
58: #
59:
60: package Apache::lonxml;
61: use vars
62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
63: use strict;
64: use HTML::LCParser();
65: use HTML::TreeBuilder();
66: use HTML::Entities();
67: use Safe();
68: use Safe::Hole();
69: use Math::Cephes();
70: use Math::Random();
71: use Opcode();
72:
73: sub register {
74: my ($space,@taglist) = @_;
75: foreach my $temptag (@taglist) {
76: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
77: }
78: }
79:
80: sub deregister {
81: my ($space,@taglist) = @_;
82: foreach my $temptag (@taglist) {
83: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
84: if ($tempspace eq $space) {
85: pop(@{ $Apache::lonxml::alltags{$temptag} });
86: }
87: }
88: #&printalltags();
89: }
90:
91: use Apache::Constants qw(:common);
92: use Apache::lontexconvert();
93: use Apache::style();
94: use Apache::run();
95: use Apache::londefdef();
96: use Apache::scripttag();
97: use Apache::edit();
98: use Apache::lonnet();
99: use Apache::File();
100: use Apache::loncommon();
101: use Apache::lonfeedback();
102: use Apache::lonmsg();
103: use Apache::loncacc();
104:
105: #================================================== Main subroutine: xmlparse
106: #debugging control, to turn on debugging modify the correct handler
107: $Apache::lonxml::debug=0;
108:
109: # keeps count of the number of warnings and errors generated in a parse
110: $warningcount=0;
111: $errorcount=0;
112:
113: #path to the directory containing the file currently being processed
114: @pwd=();
115:
116: #these two are used for capturing a subset of the output for later processing,
117: #don't touch them directly use &startredirection and &endredirection
118: @outputstack = ();
119: $redirection = 0;
120:
121: #controls wheter the <import> tag actually does
122: $import = 1;
123: @extlinks=();
124:
125: # meta mode is a bit weird only some output is to be turned off
126: #<output> tag turns metamode off (defined in londefdef.pm)
127: $metamode = 0;
128:
129: # turns on and of run::evaluate actually derefencing var refs
130: $evaluate = 1;
131:
132: # data structure for eidt mode, determines what tags can go into what other tags
133: %insertlist=();
134:
135: # stores the list of active tag namespaces
136: @namespace=();
137:
138: # if 0 all high ASCII characters will be encoded into HTML Entities
139: $prevent_entity_encode=0;
140:
141: # has the dynamic menu been updated to know about this resource
142: $Apache::lonxml::registered=0;
143:
144: # a pointer the the Apache request object
145: $Apache::lonxml::request='';
146:
147: # a problem number counter, and check on ether it is used
148: $Apache::lonxml::counter=4;
149: $Apache::lonxml::counter_changed=0;
150:
151: #internal check on whether to look at style defs
152: $Apache::lonxml::usestyle=1;
153:
154: sub xmlbegin {
155: my $output='';
156: if ($ENV{'browser.mathml'}) {
157: $output='<?xml version="1.0"?>'
158: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
159: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
160: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
161: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
162: .'xmlns="http://www.w3.org/TR/REC-html40">';
163: } else {
164: $output='<html>';
165: }
166: return $output;
167: }
168:
169: sub xmlend {
170: my ($discussiononly,$symb)=@_;
171: my $discussion='';
172: if ($ENV{'request.course.id'}) {
173: my $crs='/'.$ENV{'request.course.id'};
174: if ($ENV{'request.course.sec'}) {
175: $crs.='_'.$ENV{'request.course.sec'};
176: }
177: $crs=~s/\_/\//g;
178: my $seeid=&Apache::lonnet::allowed('rin',$crs);
179: unless ($symb) {
180: $symb=&Apache::lonnet::symbread();
181: }
182: if ($symb) {
183: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
184: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
185: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
186: if ($contrib{'version'}) {
187: unless ($discussiononly) {
188: $discussion.=
189: '<address><hr />';
190: }
191: my $idx;
192: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
193: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
194: my $deleted=($contrib{'deleted'}=~/\.$idx\./);
195: unless ((($hidden) && (!$seeid)) || ($deleted)) {
196: my $message=$contrib{$idx.':message'};
197: $message=~s/\n/\<br \/\>/g;
198: $message=&Apache::lontexconvert::msgtexconverted($message);
199: if ($message) {
200: if ($hidden) {
201: $message='<font color="#888888">'.$message.'</font>';
202: }
203: my $screenname=&Apache::loncommon::screenname(
204: $contrib{$idx.':sendername'},
205: $contrib{$idx.':senderdomain'});
206: my $plainname=&Apache::loncommon::nickname(
207: $contrib{$idx.':sendername'},
208: $contrib{$idx.':senderdomain'});
209:
210: my $sender='Anonymous';
211: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
212: $sender=&Apache::loncommon::aboutmewrapper(
213: $plainname,
214: $contrib{$idx.':sendername'},
215: $contrib{$idx.':senderdomain'}).' ('.
216: $contrib{$idx.':sendername'}.' at '.
217: $contrib{$idx.':senderdomain'}.')';
218: if ($contrib{$idx.':anonymous'}) {
219: $sender.=' [anonymous] '.
220: $screenname;
221: }
222: if ($seeid) {
223: if ($hidden) {
224: $sender.=' <a href="/adm/feedback?unhide='.
225: $symb.':::'.$idx.'">Make Visible</a>';
226: } else {
227: $sender.=' <a href="/adm/feedback?hide='.
228: $symb.':::'.$idx.'">Hide</a>';
229: }
230: $sender.=' <a href="/adm/feedback?deldisc='.
231: $symb.':::'.$idx.'">Delete</a>';
232: }
233: } else {
234: if ($screenname) {
235: $sender='<i>'.$screenname.'</i>';
236: }
237: }
238: $discussion.='<p><b>'.$sender.'</b> ('.
239: localtime($contrib{$idx.':timestamp'}).
240: '):<blockquote>'.$message.
241: '</blockquote></p>';
242: }
243: }
244: }
245: unless ($discussiononly) {
246: $discussion.='</address>';
247: }
248: }
249: if ($discussiononly) {
250: $discussion.=(<<ENDDISCUSS);
251: <form action="/adm/feedback" method="post" name="mailform">
252: <input type="submit" name="discuss" value="Post Discussion" />
253: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
254: <input type="hidden" name="symb" value="$symb" />
255: <input type="hidden" name="sendit" value="true" />
256: <br />
257: <font size="1">Note: in anonymous discussion, your name is visible only to
258: course faculty</font><br />
259: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
260: </form>
261: ENDDISCUSS
262: $discussion.=&Apache::lonfeedback::generate_preview_button();
263: }
264: }
265: }
266: return $discussion.($discussiononly?'':'</html>');
267: }
268:
269: sub tokeninputfield {
270: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
271: $defhost=~tr/a-z/A-Z/;
272: return (<<ENDINPUTFIELD)
273: <script type="text/javascript">
274: function updatetoken() {
275: var comp=new Array;
276: var barcode=unescape(document.tokeninput.barcode.value);
277: comp=barcode.split('*');
278: if (typeof(comp[0])!="undefined") {
279: document.tokeninput.codeone.value=comp[0];
280: }
281: if (typeof(comp[1])!="undefined") {
282: document.tokeninput.codetwo.value=comp[1];
283: }
284: if (typeof(comp[2])!="undefined") {
285: comp[2]=comp[2].toUpperCase();
286: document.tokeninput.codethree.value=comp[2];
287: }
288: document.tokeninput.barcode.value='';
289: }
290: </script>
291: <form method="post" name="tokeninput">
292: <table border="2" bgcolor="#FFFFBB">
293: <tr><th>DocID Checkin</th></tr>
294: <tr><td>
295: <table>
296: <tr>
297: <td>Scan in Barcode</td>
298: <td><input type="text" size="22" name="barcode"
299: onChange="updatetoken()"/></td>
300: </tr>
301: <tr><td><i>or</i> Type in DocID</td>
302: <td>
303: <input type="text" size="5" name="codeone" />
304: <b><font size="+2">*</font></b>
305: <input type="text" size="5" name="codetwo" />
306: <b><font size="+2">*</font></b>
307: <input type="text" size="10" name="codethree" value="$defhost"
308: onChange="this.value=this.value.toUpperCase()" />
309: </td></tr>
310: </table>
311: </td></tr>
312: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
313: </table>
314: </form>
315: ENDINPUTFIELD
316: }
317:
318: sub maketoken {
319: my ($symb,$tuname,$tudom,$tcrsid)=@_;
320: unless ($symb) {
321: $symb=&Apache::lonnet::symbread();
322: }
323: unless ($tuname) {
324: $tuname=$ENV{'user.name'};
325: $tudom=$ENV{'user.domain'};
326: $tcrsid=$ENV{'request.course.id'};
327: }
328:
329: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
330: }
331:
332: sub printtokenheader {
333: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
334: unless ($token) { return ''; }
335:
336: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
337: unless ($tsymb) {
338: $tsymb=$symb;
339: }
340: unless ($tuname) {
341: $tuname=$name;
342: $tudom=$domain;
343: $tcrsid=$courseid;
344: }
345:
346: my %reply=&Apache::lonnet::get('environment',
347: ['firstname','middlename','lastname','generation'],
348: $tudom,$tuname);
349: my $plainname=$reply{'firstname'}.' '.
350: $reply{'middlename'}.' '.
351: $reply{'lastname'}.' '.
352: $reply{'generation'};
353:
354: if ($target eq 'web') {
355: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
356: return
357: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
358: 'Checked out for '.$plainname.
359: '<br />User: '.$tuname.' at '.$tudom.
360: '<br />ID: '.$idhash{$tuname}.
361: '<br />CourseID: '.$tcrsid.
362: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
363: '<br />DocID: '.$token.
364: '<br />Time: '.localtime().'<hr />';
365: } else {
366: return $token;
367: }
368: }
369:
370: sub fontsettings() {
371: my $headerstring='';
372: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
373: $headerstring.=
374: '<meta Content-Type="text/html; charset=x-mac-roman">';
375: }
376: return $headerstring;
377: }
378:
379: sub registerurl {
380: my $forcereg=shift;
381: my $target = shift;
382: my $result = '';
383:
384: if ($target eq 'edit') {
385: $result .="<script type=\"text/javascrtipt\">\n".
386: "if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
387: &Apache::loncommon::browser_and_searcher_javascript().
388: "\n</script>\n";
389: }
390: if (($ENV{'browser.interface'} eq 'textual') ||
391: ((($ENV{'request.publicaccess'}) ||
392: (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
393: (!$forcereg))) {
394: return $result.
395: '<script type="text/javascript">function LONCAPAreg(){;} function LONCAPAstale(){}</script>';
396: }
397: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
398: $Apache::lonxml::registered=1;
399: my $reopen=&Apache::lonmenu::reopenmenu();
400: my $newmail='';
401: if (&Apache::lonmsg::newmail()) {
402: $newmail='swmenu.setstatus("you have","messages");';
403: }
404: my $timesync='swmenu.syncclock(1000*'.time.');';
405: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
406: my $hwkadd='';
407: if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
408: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
409: $hwkadd.=(<<ENDSUBM);
410: swmenu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")',
411: 'View user submissions for this assessment resource');
412: ENDSUBM
413: }
414: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
415: $hwkadd.=(<<ENDGRDS);
416: swmenu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")',
417: 'Modify user grades for this assessment resource');
418: ENDGRDS
419: }
420: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
421: $hwkadd.=(<<ENDPARM);
422: swmenu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")',
423: 'Modify deadlines, etc, for this assessment resource');
424: ENDPARM
425: }
426: }
427: ###
428: ### Determine whether or not to display the 'cstr' button for this
429: ### resource
430: ###
431: my $editbutton = '';
432: if ($ENV{'user.author'}) {
433: if ($ENV{'request.role'}=~/^(ca|au)/) {
434: # Set defaults for authors
435: my ($top,$bottom) = ('con-','struct');
436: my $action = "go('/priv/".$ENV{'user.name'}."');";
437: my $cadom = $ENV{'request.role.domain'};
438: my $caname = $ENV{'user.name'};
439: my $desc = "Enter my resource construction space";
440: # Set defaults for co-authors
441: if ($ENV{'request.role'} =~ /^ca/) {
442: ($cadom,$caname)=($ENV{'request.role'}=~/(\w+)\/(\w+)$/);
443: ($top,$bottom) = ('co con-','struct');
444: $action = "go('/priv/".$caname."');";
445: $desc = "Enter construction space as co-author";
446: }
447: # Check that we are on the correct machine
448: my $home = &Apache::lonnet::homeserver($caname,$cadom);
449: if ($home eq $Apache::lonnet::perlvar{'lonHostID'}) {
450: $editbutton=&Apache::lonmenu::switch
451: ('','',6,1,$top,,$bottom,$action,$desc);
452: }
453: }
454: ##
455: ## Determine if user can edit url.
456: ##
457: my $cfile='';
458: my $cfuname='';
459: my $cfudom='';
460: if ($ENV{'request.filename'}) {
461: my $file=&Apache::lonnet::declutter($ENV{'request.filename'});
462: $file=~s/^(\w+)\/(\w+)/\/priv\/$2/;
463: # Chech that the user has permission to edit this resource
464: ($cfuname,$cfudom)=&Apache::loncacc::constructaccess($file,$1);
465: if (defined($cfudom)) {
466: if (&Apache::lonnet::homeserver($cfuname,$cfudom)
467: eq $Apache::lonnet::perlvar{'lonHostID'}) {
468: $cfile=$file;
469: }
470: }
471: }
472: # Finally, turn the button on or off
473: if ($cfile) {
474: $editbutton=&Apache::lonmenu::switch
475: ('','',6,1,'cstr.gif','edit','resource',
476: "go('".$cfile."');","Edit this resource");
477: } elsif ($editbutton eq '') {
478: $editbutton = ' swmenu.clearbut(6,1);';
479: }
480: }
481: ###
482: ###
483: $result = (<<ENDREGTHIS);
484:
485: <script language="JavaScript">
486: // BEGIN LON-CAPA Internal
487:
488: function LONCAPAreg() {
489: swmenu=$reopen;
490: swmenu.clearTimeout(swmenu.menucltim);
491: $timesync
492: $newmail
493: swmenu.currentURL=window.location.pathname;
494: swmenu.reloadURL=window.location.pathname;
495: swmenu.currentSymb="$ENV{'request.symb'}";
496: swmenu.reloadSymb="$ENV{'request.symb'}";
497: swmenu.currentStale=0;
498: swmenu.clearbut(3,1);
499: swmenu.switchbutton
500: (6,3,'catalog.gif','catalog','info','catalog_info()','Show catalog information');
501: swmenu.switchbutton
502: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)','Provide my evaluation of this resource');
503: swmenu.switchbutton
504: (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)','Provide feedback messages or contribute to the course discussion about this resource');
505: swmenu.switchbutton
506: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)','Prepare a printable document');
507: swmenu.switchbutton
508: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)','Go to the previous resource in the course sequence');
509: swmenu.switchbutton
510: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)','Go to the next resource in the course sequence');
511: swmenu.switchbutton
512: (9,1,'sbkm.gif','set','bookmark','set_bookmark()','Set a bookmark for this resource');
513: swmenu.switchbutton
514: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()','Use or edit my bookmark collection');
515: swmenu.switchbutton
516: (9,3,'anot.gif','anno-','tations','annotate()','Make notes and annotations about this resource');
517: $hwkadd
518: $editbutton
519: }
520:
521: function LONCAPAstale() {
522: swmenu=$reopen
523: swmenu.currentStale=1;
524: if (swmenu.reloadURL!='' && swmenu.reloadURL!= null) {
525: swmenu.switchbutton
526: (3,1,'reload.gif','return','location','go(reloadURL)','Return to the last known location in the course sequence');
527: }
528: swmenu.clearbut(7,1);
529: swmenu.clearbut(7,2);
530: swmenu.clearbut(7,3);
531: swmenu.menucltim=swmenu.setTimeout(
532: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
533: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3);clearbut(6,1)',
534: 2000);
535:
536: }
537:
538: // END LON-CAPA Internal
539: </script>
540: ENDREGTHIS
541:
542: } else {
543: $result = (<<ENDDONOTREGTHIS);
544:
545: <script language="JavaScript">
546: // BEGIN LON-CAPA Internal
547:
548: function LONCAPAreg() {
549: swmenu=$reopen
550: $timesync
551: swmenu.currentStale=1;
552: swmenu.clearbut(2,1);
553: swmenu.clearbut(2,3);
554: swmenu.clearbut(8,1);
555: swmenu.clearbut(8,2);
556: swmenu.clearbut(8,3);
557: if (swmenu.currentURL) {
558: swmenu.switchbutton
559: (3,1,'reload.gif','return','location','go(currentURL)');
560: } else {
561: swmenu.clearbut(3,1);
562: }
563: }
564:
565: function LONCAPAstale() {
566: }
567:
568: // END LON-CAPA Internal
569: </script>
570: ENDDONOTREGTHIS
571: }
572: return $result;
573: }
574:
575: sub loadevents() {
576: return 'LONCAPAreg();';
577: }
578:
579: sub unloadevents() {
580: return 'LONCAPAstale();';
581: }
582:
583: sub printalltags {
584: my $temp;
585: foreach $temp (sort keys %Apache::lonxml::alltags) {
586: &Apache::lonxml::debug("$temp -- ".
587: join(',',@{ $Apache::lonxml::alltags{$temp} }));
588: }
589: }
590:
591: sub xmlparse {
592: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
593:
594: &setup_globals($request,$target);
595: &Apache::inputtags::initialize_inputtags();
596: &Apache::outputtags::initialize_outputtags();
597: &Apache::edit::initialize_edit();
598: #
599: # do we have a course style file?
600: #
601:
602: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
603: my $bodytext=
604: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
605: if ($bodytext) {
606: my $location=&Apache::lonnet::filelocation('',$bodytext);
607: my $styletext=&Apache::lonnet::getfile($location);
608: if ($styletext ne '-1') {
609: %style_for_target = (%style_for_target,
610: &Apache::style::styleparser($target,$styletext));
611: }
612: }
613: }
614:
615: #&printalltags();
616: my @pars = ();
617: my $pwd=$ENV{'request.filename'};
618: $pwd =~ s:/[^/]*$::;
619: &newparser(\@pars,\$content_file_string,$pwd);
620:
621: my $safeeval = new Safe;
622: my $safehole = new Safe::Hole;
623: &init_safespace($target,$safeeval,$safehole,$safeinit);
624: #-------------------- Redefinition of the target in the case of compound target
625:
626: ($target, my @tenta) = split('&&',$target);
627:
628: my @stack = ();
629: my @parstack = ();
630: &initdepth;
631:
632: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
633: $safeeval,\%style_for_target);
634: if ($ENV{'request.uri'}) {
635: &writeallows($ENV{'request.uri'});
636: }
637: if ($Apache::lonxml::counter_changed) { &store_counter() }
638: return $finaloutput;
639: }
640:
641: sub htmlclean {
642: my ($raw,$full)=@_;
643:
644: my $tree = HTML::TreeBuilder->new;
645: $tree->ignore_unknown(0);
646:
647: $tree->parse($raw);
648:
649: my $output= $tree->as_HTML(undef,' ');
650:
651: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
652: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
653: unless ($full) {
654: $output=~s/\<[\/]*(body|head|html)\>//gis;
655: }
656:
657: $tree = $tree->delete;
658:
659: return $output;
660: }
661:
662: sub latex_special_symbols {
663: my ($current_token,$stack,$parstack,$where)=@_;
664: if ($where=='header') {
665: $current_token =~ s/_/ /g;
666: $current_token =~ s/\^/ /g;
667: $current_token =~ s/&/\\&/g;
668: } else {
669: $current_token=~s/\\ /\\char92 /g;
670: $current_token=~s/\^/\\char94 /g;
671: $current_token=~s/\~/\\char126 /g;
672: $current_token=~s/(&[^a-z\#])/\\$1/g;
673: $current_token=~s/([^&])\#/$1\\#/g;
674: $current_token=~s/(\$|_|{|})/\\$1/g;
675: $current_token=~s/\\char92 /\\texttt{\\char92}/g;
676: $current_token=~s/>/\$>\$/g; #more
677: $current_token=~s/</\$<\$/g; #less
678: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
679: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
680: }
681: return $current_token;
682: }
683:
684: sub inner_xmlparse {
685: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
686: my $finaloutput = '';
687: my $result;
688: my $token;
689: while ( $#$pars > -1 ) {
690: while ($token = $$pars['-1']->get_token) {
691: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
692: if ($metamode<1) {
693: my $text=$token->[1];
694: if ($token->[0] eq 'C' && $target eq 'tex') {
695: $text = '%'.$text."\n";
696: }
697: $result.=$text;
698: }
699: } elsif ($token->[0] eq 'PI') {
700: if ($metamode<1) {
701: $result=$token->[2];
702: }
703: } elsif ($token->[0] eq 'S') {
704: # add tag to stack
705: push (@$stack,$token->[1]);
706: # add parameters list to another stack
707: push (@$parstack,&parstring($token));
708: &increasedepth($token);
709: if ($Apache::lonxml::usestyle &&
710: exists($$style_for_target{$token->[1]})) {
711: $Apache::lonxml::usestyle=0;
712: my $string=$$style_for_target{$token->[1]}.
713: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
714: &Apache::lonxml::newparser($pars,\$string);
715: } else {
716: $result = &callsub("start_$token->[1]", $target, $token, $stack,
717: $parstack, $pars, $safeeval, $style_for_target);
718: }
719: } elsif ($token->[0] eq 'E') {
720: #clear out any tags that didn't end
721: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
722: my $lasttag=$$stack[-1];
723: if ($token->[1] =~ /^$lasttag$/i) {
724: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
725: last;
726: } else {
727: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
728: &end_tag($stack,$parstack,$token);
729: }
730: }
731:
732: if ($Apache::lonxml::usestyle &&
733: exists($$style_for_target{'/'."$token->[1]"})) {
734: $Apache::lonxml::usestyle=0;
735: my $string=$$style_for_target{'/'.$token->[1]}.
736: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
737: &Apache::lonxml::newparser($pars,\$string);
738: } else {
739: $result = &callsub("end_$token->[1]", $target, $token, $stack,
740: $parstack, $pars,$safeeval, $style_for_target);
741: }
742: } else {
743: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
744: }
745: #evaluate variable refs in result
746: if ($result ne "") {
747: if ( $#$parstack > -1 ) {
748: $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
749: } else {
750: $result= &Apache::run::evaluate($result,$safeeval,'');
751: }
752: }
753: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
754: if ($target eq 'tex') {
755: $result=&latex_special_symbols($result,$stack,$parstack);
756: }
757: }
758:
759: # Encode any high ASCII characters
760: if (!$Apache::lonxml::prevent_entity_encode) {
761: $result=&HTML::Entities::encode($result,"\200-\377");
762: }
763: if ($Apache::lonxml::redirection) {
764: $Apache::lonxml::outputstack['-1'] .= $result;
765: } else {
766: $finaloutput.=$result;
767: }
768: $result = '';
769:
770: if ($token->[0] eq 'E') {
771: &end_tag($stack,$parstack,$token);
772: }
773: }
774: if ($#$pars > -1) {
775: pop @$pars;
776: pop @Apache::lonxml::pwd;
777: }
778: }
779:
780: # if ($target eq 'meta') {
781: # $finaloutput.=&endredirection;
782: # }
783:
784:
785: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
786: $finaloutput=&afterburn($finaloutput);
787: }
788: return $finaloutput;
789: }
790:
791: sub callsub {
792: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
793: my $currentstring='';
794: my $nodefault;
795: {
796: my $sub1;
797: no strict 'refs';
798: my $tag=$token->[1];
799: my $space=$Apache::lonxml::alltags{$tag}[-1];
800: if (!$space) {
801: $tag=~tr/A-Z/a-z/;
802: $sub=~tr/A-Z/a-z/;
803: $space=$Apache::lonxml::alltags{$tag}[-1]
804: }
805:
806: my $deleted=0;
807: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
808: if (($token->[0] eq 'S') && ($target eq 'modified')) {
809: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
810: $parstack,$parser,$safeeval,
811: $style);
812: }
813: if (!$deleted) {
814: if ($space) {
815: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
816: $sub1="$space\:\:$sub";
817: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
818: $parstack,$parser,$safeeval,
819: $style);
820: } else {
821: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
822: if ($metamode <1) {
823: if (defined($token->[4]) && ($metamode < 1)) {
824: $currentstring = $token->[4];
825: } else {
826: $currentstring = $token->[2];
827: }
828: }
829: }
830: # &Apache::lonxml::debug("nodefalt:$nodefault:");
831: if ($currentstring eq '' && $nodefault eq '') {
832: if ($target eq 'edit') {
833: #&Apache::lonxml::debug("doing default edit for $token->[1]");
834: if ($token->[0] eq 'S') {
835: $currentstring = &Apache::edit::tag_start($target,$token);
836: } elsif ($token->[0] eq 'E') {
837: $currentstring = &Apache::edit::tag_end($target,$token);
838: }
839: } elsif ($target eq 'modified') {
840: if ($token->[0] eq 'S') {
841: $currentstring = $token->[4];
842: $currentstring.=&Apache::edit::handle_insert();
843: } elsif ($token->[0] eq 'E') {
844: $currentstring = $token->[2];
845: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
846: } else {
847: $currentstring = $token->[2];
848: }
849: }
850: }
851: }
852: use strict 'refs';
853: }
854: return $currentstring;
855: }
856:
857: sub setup_globals {
858: my ($request,$target)=@_;
859: $Apache::lonxml::request=$request;
860: $Apache::lonxml::registered = 0;
861: $errorcount=0;
862: $warningcount=0;
863: $Apache::lonxml::default_homework_loaded=0;
864: $Apache::lonxml::usestyle=1;
865: &init_counter();
866: @Apache::lonxml::pwd=();
867: @Apache::lonxml::extlinks=();
868: if ($target eq 'meta') {
869: $Apache::lonxml::redirection = 0;
870: $Apache::lonxml::metamode = 1;
871: $Apache::lonxml::evaluate = 1;
872: $Apache::lonxml::import = 0;
873: } elsif ($target eq 'answer') {
874: $Apache::lonxml::redirection = 0;
875: $Apache::lonxml::metamode = 1;
876: $Apache::lonxml::evaluate = 1;
877: $Apache::lonxml::import = 1;
878: } elsif ($target eq 'grade') {
879: &startredirection;
880: $Apache::lonxml::metamode = 0;
881: $Apache::lonxml::evaluate = 1;
882: $Apache::lonxml::import = 1;
883: } elsif ($target eq 'modified') {
884: $Apache::lonxml::redirection = 0;
885: $Apache::lonxml::metamode = 0;
886: $Apache::lonxml::evaluate = 0;
887: $Apache::lonxml::import = 0;
888: } elsif ($target eq 'edit') {
889: $Apache::lonxml::redirection = 0;
890: $Apache::lonxml::metamode = 0;
891: $Apache::lonxml::evaluate = 0;
892: $Apache::lonxml::import = 0;
893: } elsif ($target eq 'analyze') {
894: $Apache::lonxml::redirection = 0;
895: $Apache::lonxml::metamode = 0;
896: $Apache::lonxml::evaluate = 1;
897: $Apache::lonxml::import = 1;
898: } else {
899: $Apache::lonxml::redirection = 0;
900: $Apache::lonxml::metamode = 0;
901: $Apache::lonxml::evaluate = 1;
902: $Apache::lonxml::import = 1;
903: }
904: }
905:
906: sub init_safespace {
907: my ($target,$safeeval,$safehole,$safeinit) = @_;
908: $safeeval->permit("entereval");
909: $safeeval->permit(":base_math");
910: $safeeval->permit("sort");
911: $safeeval->deny(":base_io");
912: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
913: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
914:
915: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
916: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
917: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
918: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
919: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
920: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
921: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
922: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
923: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
924: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
925: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
926: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
927: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
928: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
929: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
930: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
931: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
932: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
933: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
934:
935: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
936: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
937: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
938: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
939: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
940: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
941: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
942: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
943: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
944: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
945: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
946: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
947: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
948: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
949: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
950: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
951: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
952: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
953: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
954: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
955: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
956: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
957:
958: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
959: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
960: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
961: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
962: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
963: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
964:
965: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
966: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
967: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
968: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
969: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
970: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
971: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
972: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
973: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
974: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
975: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
976: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
977: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
978: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
979: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
980: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
981: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
982: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
983: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
984: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
985: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
986:
987: #need to inspect this class of ops
988: # $safeeval->deny(":base_orig");
989: $safeinit .= ';$external::target="'.$target.'";';
990: my $rndseed;
991: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
992: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
993: $safeinit .= ';$external::randomseed='.$rndseed.';';
994: &Apache::run::run($safeinit,$safeeval);
995: }
996:
997: sub default_homework_load {
998: my ($safeeval)=@_;
999: &Apache::lonxml::debug('Loading default_homework');
1000: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1001: if ($default == -1) {
1002: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
1003: } else {
1004: &Apache::run::run($default,$safeeval);
1005: $Apache::lonxml::default_homework_loaded=1;
1006: }
1007: }
1008:
1009: sub startredirection {
1010: $Apache::lonxml::redirection++;
1011: push (@Apache::lonxml::outputstack, '');
1012: }
1013:
1014: sub endredirection {
1015: if (!$Apache::lonxml::redirection) {
1016: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1017: return '';
1018: }
1019: $Apache::lonxml::redirection--;
1020: pop @Apache::lonxml::outputstack;
1021: }
1022:
1023: sub end_tag {
1024: my ($tagstack,$parstack,$token)=@_;
1025: pop(@$tagstack);
1026: pop(@$parstack);
1027: &decreasedepth($token);
1028: }
1029:
1030: sub initdepth {
1031: @Apache::lonxml::depthcounter=();
1032: $Apache::lonxml::depth=-1;
1033: $Apache::lonxml::olddepth=-1;
1034: }
1035:
1036: sub increasedepth {
1037: my ($token) = @_;
1038: $Apache::lonxml::depth++;
1039: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
1040: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
1041: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
1042: }
1043: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1044: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1045: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1046: }
1047:
1048: sub decreasedepth {
1049: my ($token) = @_;
1050: $Apache::lonxml::depth--;
1051: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
1052: $#Apache::lonxml::depthcounter--;
1053: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
1054: }
1055: if ( $Apache::lonxml::depth < -1) {
1056: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
1057: $Apache::lonxml::depth='-1';
1058: }
1059: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1060: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1061: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1062: }
1063:
1064: sub get_all_text_unbalanced {
1065: #there is a copy of this in lonpublisher.pm
1066: my($tag,$pars)= @_;
1067: my $token;
1068: my $result='';
1069: $tag='<'.$tag.'>';
1070: while ($token = $$pars[-1]->get_token) {
1071: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1072: $result.=$token->[1];
1073: } elsif ($token->[0] eq 'PI') {
1074: $result.=$token->[2];
1075: } elsif ($token->[0] eq 'S') {
1076: $result.=$token->[4];
1077: } elsif ($token->[0] eq 'E') {
1078: $result.=$token->[2];
1079: }
1080: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
1081: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1082: &Apache::lonxml::debug('Result is :'.$1);
1083: $result=$1;
1084: my $redo=$tag.$2;
1085: &Apache::lonxml::newparser($pars,\$redo);
1086: last;
1087: }
1088: }
1089: return $result
1090: }
1091:
1092: sub increment_counter {
1093: $Apache::lonxml::counter++;
1094: $Apache::lonxml::counter_changed=1;
1095: }
1096:
1097: sub init_counter {
1098: if (defined($ENV{'form.counter'})) {
1099: $Apache::lonxml::counter=$ENV{'form.counter'};
1100: } elsif (not defined($Apache::lonxml::counter)) {
1101: $Apache::lonxml::counter=1;
1102: &store_counter();
1103: }
1104: $Apache::lonxml::counter_changed=0;
1105: }
1106:
1107: sub store_counter {
1108: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1109: return '';
1110: }
1111:
1112: sub get_all_text {
1113: my($tag,$pars)= @_;
1114: &Apache::lonxml::debug("Got a ".ref($pars));
1115: my $gotfullstack=1;
1116: if (ref($pars) ne 'ARRAY') {
1117: $gotfullstack=0;
1118: $pars=[$pars];
1119: }
1120: my $depth=0;
1121: my $token;
1122: my $result='';
1123: if ( $tag =~ m:^/: ) {
1124: my $tag=substr($tag,1);
1125: #&Apache::lonxml::debug("have:$tag:");
1126: my $top_empty=0;
1127: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1128: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1129: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1130: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1131: $result.=$token->[1];
1132: } elsif ($token->[0] eq 'PI') {
1133: $result.=$token->[2];
1134: } elsif ($token->[0] eq 'S') {
1135: if ($token->[1] =~ /^$tag$/i) { $depth++; }
1136: $result.=$token->[4];
1137: } elsif ($token->[0] eq 'E') {
1138: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
1139: #skip sending back the last end tag
1140: if ($depth > -1) { $result.=$token->[2]; } else {
1141: $$pars[-1]->unget_token($token);
1142: }
1143: }
1144: }
1145: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1146: if (($depth >=0) && ($#$pars > 0) ) {
1147: pop(@$pars);
1148: pop(@Apache::lonxml::pwd);
1149: }
1150: }
1151: if ($top_empty && $depth >= 0) {
1152: #never found the end tag ran out of text, throw error send back blank
1153: &error('Never found end tag for <'.$tag.'>');
1154: if ($gotfullstack) {
1155: my $newstring='</'.$tag.'>'.$result;
1156: &Apache::lonxml::newparser($pars,\$newstring);
1157: }
1158: $result='';
1159: }
1160: } else {
1161: while ($#$pars > -1) {
1162: while ($token = $$pars[-1]->get_token) {
1163: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1164: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1165: ($token->[0] eq 'D')) {
1166: $result.=$token->[1];
1167: } elsif ($token->[0] eq 'PI') {
1168: $result.=$token->[2];
1169: } elsif ($token->[0] eq 'S') {
1170: if ( $token->[1] =~ /^$tag$/i) {
1171: $$pars[-1]->unget_token($token); last;
1172: } else {
1173: $result.=$token->[4];
1174: }
1175: } elsif ($token->[0] eq 'E') {
1176: $result.=$token->[2];
1177: }
1178: }
1179: if (($#$pars > 0) ) {
1180: pop(@$pars);
1181: pop(@Apache::lonxml::pwd);
1182: } else { last; }
1183: }
1184: }
1185: if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) {
1186: $Apache::lonxml::usestyle=1;
1187: }
1188: #&Apache::lonxml::debug("Exit:$result:");
1189: return $result
1190: }
1191:
1192: sub newparser {
1193: my ($parser,$contentref,$dir) = @_;
1194: push (@$parser,HTML::LCParser->new($contentref));
1195: $$parser['-1']->xml_mode('1');
1196: if ( $dir eq '' ) {
1197: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1198: } else {
1199: push (@Apache::lonxml::pwd, $dir);
1200: }
1201: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
1202: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
1203: }
1204:
1205: sub parstring {
1206: my ($token) = @_;
1207: my $temp='';
1208: foreach (@{$token->[3]}) {
1209: unless ($_=~/\W/) {
1210: my $val=$token->[2]->{$_};
1211: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1212: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1213: $temp .= "my \$$_=\"$val\";"
1214: }
1215: }
1216: return $temp;
1217: }
1218:
1219: sub writeallows {
1220: unless ($#extlinks>=0) { return; }
1221: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1222: if ($ENV{'httpref.'.$thisurl}) {
1223: $thisurl=$ENV{'httpref.'.$thisurl};
1224: }
1225: my $thisdir=$thisurl;
1226: $thisdir=~s/\/[^\/]+$//;
1227: my %httpref=();
1228: foreach (@extlinks) {
1229: $httpref{'httpref.'.
1230: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1231: }
1232: @extlinks=();
1233: &Apache::lonnet::appenv(%httpref);
1234: }
1235:
1236: #
1237: # Afterburner handles anchors, highlights and links
1238: #
1239: sub afterburn {
1240: my $result=shift;
1241: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1242: ['highlight','anchor','link']);
1243: if ($ENV{'form.highlight'}) {
1244: foreach (split(/\,/,$ENV{'form.highlight'})) {
1245: my $anchorname=$_;
1246: my $matchthis=$anchorname;
1247: $matchthis=~s/\_+/\\s\+/g;
1248: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1249: }
1250: }
1251: if ($ENV{'form.link'}) {
1252: foreach (split(/\,/,$ENV{'form.link'})) {
1253: my ($anchorname,$linkurl)=split(/\>/,$_);
1254: my $matchthis=$anchorname;
1255: $matchthis=~s/\_+/\\s\+/g;
1256: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1257: }
1258: }
1259: if ($ENV{'form.anchor'}) {
1260: my $anchorname=$ENV{'form.anchor'};
1261: my $matchthis=$anchorname;
1262: $matchthis=~s/\_+/\\s\+/g;
1263: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1264: $result.=(<<"ENDSCRIPT");
1265: <script type="text/javascript">
1266: document.location.hash='$anchorname';
1267: </script>
1268: ENDSCRIPT
1269: }
1270: return $result;
1271: }
1272:
1273: sub storefile {
1274: my ($file,$contents)=@_;
1275: if (my $fh=Apache::File->new('>'.$file)) {
1276: print $fh $contents;
1277: $fh->close();
1278: } else {
1279: &warning("Unable to save file $file");
1280: }
1281: }
1282:
1283: sub createnewhtml {
1284: my $filecontents=(<<SIMPLECONTENT);
1285: <html>
1286: <head>
1287: <title>
1288: Title of Document Goes Here
1289: </title>
1290: </head>
1291: <body bgcolor="#FFFFFF">
1292:
1293: Body of Document Goes Here
1294:
1295: </body>
1296: </html>
1297: SIMPLECONTENT
1298: return $filecontents;
1299: }
1300:
1301:
1302: sub inserteditinfo {
1303: my ($result,$filecontents)=@_;
1304: $filecontents = &HTML::Entities::encode($filecontents);
1305: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1306: my $buttons=(<<BUTTONS);
1307: <input type="submit" name="attemptclean"
1308: value="Save and then attempt to clean HTML" />
1309: <input type="submit" name="savethisfile" value="Save this" />
1310: <input type="submit" name="viewmode" value="View" />
1311: BUTTONS
1312: my $editfooter=(<<ENDFOOTER);
1313: <hr />
1314: <a name="editsection" />
1315: <form method="post">
1316: <input type="hidden" name="editmode" value="Edit" />
1317: $buttons<br />
1318: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1319: <br />$buttons
1320: <br />
1321: </form>
1322: ENDFOOTER
1323: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1324: $result=~s/(\<\/body\>)/$editfooter/is;
1325: return $result;
1326: }
1327:
1328: sub get_target {
1329: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1330: if ( $ENV{'request.state'} eq 'published') {
1331: if ( defined($ENV{'form.grade_target'})
1332: && ($viewgrades == 'F' )) {
1333: return ($ENV{'form.grade_target'});
1334: } elsif (defined($ENV{'form.grade_target'})) {
1335: if (($ENV{'form.grade_target'} eq 'web') ||
1336: ($ENV{'form.grade_target'} eq 'tex') ) {
1337: return $ENV{'form.grade_target'}
1338: } else {
1339: return 'web';
1340: }
1341: } else {
1342: return 'web';
1343: }
1344: } elsif ($ENV{'request.state'} eq 'construct') {
1345: if ( defined($ENV{'form.grade_target'})) {
1346: return ($ENV{'form.grade_target'});
1347: } else {
1348: return 'web';
1349: }
1350: } else {
1351: return 'web';
1352: }
1353: }
1354:
1355: sub handler {
1356: my $request=shift;
1357:
1358: my $target=&get_target();
1359:
1360: $Apache::lonxml::debug=0;
1361:
1362: if ($ENV{'browser.mathml'}) {
1363: $request->content_type('text/xml');
1364: } else {
1365: $request->content_type('text/html');
1366: }
1367: &Apache::loncommon::no_cache($request);
1368: $request->send_http_header;
1369:
1370: return OK if $request->header_only;
1371:
1372:
1373: my $file=&Apache::lonnet::filelocation("",$request->uri);
1374: #
1375: # Edit action? Save file.
1376: #
1377: unless ($ENV{'request.state'} eq 'published') {
1378: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1379: &storefile($file,$ENV{'form.filecont'});
1380: }
1381: }
1382: my %mystyle;
1383: my $result = '';
1384: my $filecontents=&Apache::lonnet::getfile($file);
1385: if ($filecontents == -1) {
1386: $result=(<<ENDNOTFOUND);
1387: <html>
1388: <head>
1389: <title>File not found</title>
1390: </head>
1391: <body bgcolor="#FFFFFF">
1392: <b>File not found: $file</b>
1393: </body>
1394: </html>
1395: ENDNOTFOUND
1396: $filecontents='';
1397: if ($ENV{'request.state'} ne 'published') {
1398: $filecontents=&createnewhtml();
1399: $ENV{'form.editmode'}='Edit'; #force edit mode
1400: }
1401: } else {
1402: unless ($ENV{'request.state'} eq 'published') {
1403: if ($ENV{'form.attemptclean'}) {
1404: $filecontents=&htmlclean($filecontents,1);
1405: }
1406: }
1407: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1408: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1409: '',%mystyle);
1410: }
1411: }
1412:
1413: #
1414: # Edit action? Insert editing commands
1415: #
1416: unless ($ENV{'request.state'} eq 'published') {
1417: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1418: my $displayfile=$request->uri;
1419: $displayfile=~s/^\/[^\/]*//;
1420: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1421: '</h3></body></html>';
1422: $result=&inserteditinfo($result,$filecontents);
1423: }
1424: }
1425:
1426: writeallows($request->uri);
1427:
1428: $request->print($result);
1429:
1430: return OK;
1431: }
1432:
1433: sub debug {
1434: if ($Apache::lonxml::debug eq 1) {
1435: $|=1;
1436: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1437: }
1438: }
1439:
1440: sub error {
1441: $errorcount++;
1442: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1443: # If printing in construction space, put the error inside <pre></pre>
1444: print "<b>ERROR:</b>".join("\n",@_)."\n";
1445: } else {
1446: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1447: #notify author
1448: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1449: #notify course
1450: if ( $ENV{'request.course.id'} ) {
1451: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1452: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1453: foreach (keys %users) {
1454: my ($user,$domain) = split(/:/, $_);
1455: &Apache::lonmsg::user_normal_msg($user,$domain,
1456: "Error [$declutter]",join('<br />',@_));
1457: }
1458: }
1459:
1460: #FIXME probably shouldn't have me get everything forever.
1461: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1462: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1463: }
1464: }
1465:
1466: sub warning {
1467: $warningcount++;
1468: if ($ENV{'request.state'} eq 'construct') {
1469: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1470: }
1471: }
1472:
1473: sub get_param {
1474: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1475: if ( ! $context ) { $context = -1; }
1476: my $args ='';
1477: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1478: if ( ! $args ) { return undef; }
1479: if ( $case_insensitive ) {
1480: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1481: return &Apache::run::run("{$args;".'return $'.$param.'}',
1482: $safeeval); #'
1483: } else {
1484: return undef;
1485: }
1486: } else {
1487: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1488: return &Apache::run::run("{$args;".'return $'.$param.'}',
1489: $safeeval); #'
1490: } else {
1491: return undef;
1492: }
1493: }
1494: }
1495:
1496: sub get_param_var {
1497: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1498: if ( ! $context ) { $context = -1; }
1499: my $args ='';
1500: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1501: &Apache::lonxml::debug("Args are $args param is $param");
1502: if ($case_insensitive) {
1503: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1504: return undef;
1505: }
1506: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1507: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1508: &Apache::lonxml::debug("first run is $value");
1509: if ($value =~ /^[\$\@\%]\w+$/) {
1510: &Apache::lonxml::debug("doing second");
1511: my @result=&Apache::run::run("return $value",$safeeval,1);
1512: if (!defined($result[0])) {
1513: return $value
1514: } else {
1515: if (wantarray) { return @result; } else { return $result[0]; }
1516: }
1517: } else {
1518: return $value;
1519: }
1520: }
1521:
1522: sub register_insert {
1523: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1524: my $i;
1525: my $tagnum=0;
1526: my @order;
1527: for ($i=0;$i < $#data; $i++) {
1528: my $line = $data[$i];
1529: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1530: if ( $line =~ /TABLE/ ) { last; }
1531: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1532: if ($tag) {
1533: $insertlist{"$tagnum.tag"} = $tag;
1534: $insertlist{"$tagnum.description"} = $descrip;
1535: $insertlist{"$tagnum.color"} = $color;
1536: $insertlist{"$tagnum.function"} = $function;
1537: if (!defined($show)) { $show='yes'; }
1538: $insertlist{"$tagnum.show"}= $show;
1539: $insertlist{"$tag.num"}=$tagnum;
1540: $tagnum++;
1541: }
1542: }
1543: $i++; #skipping TABLE line
1544: $tagnum = 0;
1545: for (;$i < $#data;$i++) {
1546: my $line = $data[$i];
1547: my ($mnemonic,@which) = split(/ +/,$line);
1548: my $tag = $insertlist{"$tagnum.tag"};
1549: for (my $j=0;$j <=$#which;$j++) {
1550: if ( $which[$j] eq 'Y' ) {
1551: if ($insertlist{"$j.show"} ne 'no') {
1552: push(@{ $insertlist{"$tag.which"} },$j);
1553: }
1554: }
1555: }
1556: $tagnum++;
1557: }
1558: }
1559:
1560: sub description {
1561: my ($token)=@_;
1562: my $tagnum;
1563: my $tag=$token->[1];
1564: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1565: my $testtag=$namespace.'::'.$tag;
1566: $tagnum=$insertlist{"$testtag.num"};
1567: if (defined($tagnum)) { last; }
1568: }
1569: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1570: return $insertlist{$tagnum.'.description'};
1571: }
1572:
1573: # ----------------------------------------------------------------- whichuser
1574: # returns a list of $symb, $courseid, $domain, $name that is correct for
1575: # calls to lonnet functions for this setup.
1576: # - looks for form.grade_ parameters
1577: sub whichuser {
1578: my ($symb,$courseid,$domain,$name);
1579: if (defined($ENV{'form.grade_symb'})) {
1580: my $tmp_courseid=$ENV{'form.grade_courseid'};
1581: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1582: if ($allowed) {
1583: $symb=$ENV{'form.grade_symb'};
1584: $courseid=$ENV{'form.grade_courseid'};
1585: $domain=$ENV{'form.grade_domain'};
1586: $name=$ENV{'form.grade_username'};
1587: }
1588: } else {
1589: $symb=&Apache::lonnet::symbread();
1590: $courseid=$ENV{'request.course.id'};
1591: $domain=$ENV{'user.domain'};
1592: $name=$ENV{'user.name'};
1593: }
1594: return ($symb,$courseid,$domain,$name);
1595: }
1596:
1597: 1;
1598: __END__
1599:
1600:
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