1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.178 2002/06/15 18:59:26 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: # 5/10 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 $prevent_entity_encode);
64: use strict;
65: use HTML::LCParser();
66: use HTML::TreeBuilder();
67: use HTML::Entities();
68: use Safe();
69: use Safe::Hole();
70: use Math::Cephes();
71: use Math::Random();
72: use Opcode();
73:
74: sub register {
75: my ($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:
103: #================================================== Main subroutine: xmlparse
104: #debugging control, to turn on debugging modify the correct handler
105: $Apache::lonxml::debug=0;
106:
107: #path to the directory containing the file currently being processed
108: @pwd=();
109:
110: #these two are used for capturing a subset of the output for later processing,
111: #don't touch them directly use &startredirection and &endredirection
112: @outputstack = ();
113: $redirection = 0;
114:
115: #controls wheter the <import> tag actually does
116: $import = 1;
117: @extlinks=();
118:
119: # meta mode is a bit weird only some output is to be turned off
120: #<output> tag turns metamode off (defined in londefdef.pm)
121: $metamode = 0;
122:
123: # turns on and of run::evaluate actually derefencing var refs
124: $evaluate = 1;
125:
126: # data structure for eidt mode, determines what tags can go into what other tags
127: %insertlist=();
128:
129: # stores the list of active tag namespaces
130: @namespace=();
131:
132: # if 0 all high ASCII characters will be encoded into HTML Entities
133: $prevent_entity_encode=0;
134:
135: # has the dynamic menu been updated to know about this resource
136: $Apache::lonxml::registered=0;
137:
138: # a pointer the the Apache request object
139: $Apache::lonxml::request='';
140:
141: sub xmlbegin {
142: my $output='';
143: if ($ENV{'browser.mathml'}) {
144: $output='<?xml version="1.0"?>'
145: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
146: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
147: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
148: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
149: .'xmlns="http://www.w3.org/TR/REC-html40">';
150: } else {
151: $output='<html>';
152: }
153: return $output;
154: }
155:
156: sub xmlend {
157: my $discussion='';
158: if ($ENV{'request.course.id'}) {
159: my $crs='/'.$ENV{'request.course.id'};
160: if ($ENV{'request.course.sec'}) {
161: $crs.='_'.$ENV{'request.course.sec'};
162: }
163: $crs=~s/\_/\//g;
164: my $seeid=&Apache::lonnet::allowed('rin',$crs);
165: my $symb=&Apache::lonnet::symbread();
166: if ($symb) {
167: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
168: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
169: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
170: if ($contrib{'version'}) {
171: $discussion.=
172: '<address><hr /><h2>Course Discussion of Resource</h2>';
173: my $idx;
174: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
175: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
176: unless (($hidden) && (!$seeid)) {
177: my $message=$contrib{$idx.':message'};
178: $message=~s/\n/\<br \/\>/g;
179: if ($message) {
180: if ($hidden) {
181: $message='<font color="#888888">'.$message.'</font>';
182: }
183: my $sender='Anonymous';
184: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
185: $sender=$contrib{$idx.':plainname'}.' ('.
186: $contrib{$idx.':sendername'}.' at '.
187: $contrib{$idx.':senderdomain'}.')';
188: if ($contrib{$idx.':anonymous'}) {
189: $sender.=' [anonymous] '.
190: $contrib{$idx.':screenname'};
191: }
192: if ($seeid) {
193: if ($hidden) {
194: $sender.=' <a href="/adm/feedback?unhide='.
195: $symb.':::'.$idx.'">Make Visible</a>';
196: } else {
197: $sender.=' <a href="/adm/feedback?hide='.
198: $symb.':::'.$idx.'">Hide</a>';
199: }
200: }
201: } else {
202: if ($contrib{$idx.':screenname'}) {
203: $sender='<i>'.$contrib{$idx.':screenname'}.'</i>';
204: }
205: }
206: $discussion.='<p><b>'.$sender.'</b> ('.
207: localtime($contrib{$idx.':timestamp'}).
208: '):<blockquote>'.$message.
209: '</blockquote></p>';
210: }
211: }
212: }
213: $discussion.='</address>';
214: }
215: }
216: }
217: return $discussion.'</html>';
218: }
219:
220: sub tokeninputfield {
221: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
222: $defhost=~tr/a-z/A-Z/;
223: return (<<ENDINPUTFIELD)
224: <script>
225: function updatetoken() {
226: var comp=new Array;
227: var barcode=unescape(document.tokeninput.barcode.value);
228: comp=barcode.split('*');
229: if (typeof(comp[0])!="undefined") {
230: document.tokeninput.codeone.value=comp[0];
231: }
232: if (typeof(comp[1])!="undefined") {
233: document.tokeninput.codetwo.value=comp[1];
234: }
235: if (typeof(comp[2])!="undefined") {
236: comp[2]=comp[2].toUpperCase();
237: document.tokeninput.codethree.value=comp[2];
238: }
239: document.tokeninput.barcode.value='';
240: }
241: </script>
242: <form method="post" name="tokeninput">
243: <table border="2" bgcolor="#FFFFBB">
244: <tr><th>DocID Checkin</th></tr>
245: <tr><td>
246: <table>
247: <tr>
248: <td>Scan in Barcode</td>
249: <td><input type="text" size="22" name="barcode"
250: onChange="updatetoken()"/></td>
251: </tr>
252: <tr><td><i>or</i> Type in DocID</td>
253: <td>
254: <input type="text" size="5" name="codeone" />
255: <b><font size="+2">*</font></b>
256: <input type="text" size="5" name="codetwo" />
257: <b><font size="+2">*</font></b>
258: <input type="text" size="10" name="codethree" value="$defhost"
259: onChange="this.value=this.value.toUpperCase()" />
260: </td></tr>
261: </table>
262: </td></tr>
263: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
264: </table>
265: </form>
266: ENDINPUTFIELD
267: }
268:
269: sub maketoken {
270: my ($symb,$tuname,$tudom,$tcrsid)=@_;
271: unless ($symb) {
272: $symb=&Apache::lonnet::symbread();
273: }
274: unless ($tuname) {
275: $tuname=$ENV{'user.name'};
276: $tudom=$ENV{'user.domain'};
277: $tcrsid=$ENV{'request.course.id'};
278: }
279:
280: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
281: }
282:
283: sub printtokenheader {
284: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
285: unless ($token) { return ''; }
286:
287: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
288: unless ($tsymb) {
289: $tsymb=$symb;
290: }
291: unless ($tuname) {
292: $tuname=$name;
293: $tudom=$domain;
294: $tcrsid=$courseid;
295: }
296:
297: my %reply=&Apache::lonnet::get('environment',
298: ['firstname','middlename','lastname','generation'],
299: $tudom,$tuname);
300: my $plainname=$reply{'firstname'}.' '.
301: $reply{'middlename'}.' '.
302: $reply{'lastname'}.' '.
303: $reply{'generation'};
304:
305: if ($target eq 'web') {
306: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
307: return
308: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
309: 'Checked out for '.$plainname.
310: '<br />User: '.$tuname.' at '.$tudom.
311: '<br />ID: '.$idhash{$tuname}.
312: '<br />CourseID: '.$tcrsid.
313: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
314: '<br />DocID: '.$token.
315: '<br />Time: '.localtime().'<hr />';
316: } else {
317: return $token;
318: }
319: }
320:
321: sub fontsettings() {
322: my $headerstring='';
323: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
324: $headerstring.=
325: '<meta Content-Type="text/html; charset=x-mac-roman">';
326: }
327: return $headerstring;
328: }
329:
330: sub registerurl {
331: my $forcereg=shift;
332: my $target = shift;
333: my $result = '';
334: if ((($ENV{'request.publicaccess'}) ||
335: (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
336: (!$forcereg)) {
337: return
338: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
339: }
340: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
341: $Apache::lonxml::registered=1;
342: my $nothing='';
343: if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; }
344: my $timesync='menu.clock.setTime(1000*'.time.');';
345: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
346: my $hwkadd='';
347: if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
348: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
349: $hwkadd.=(<<ENDSUBM);
350: menu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")');
351: ENDSUBM
352: }
353: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
354: $hwkadd.=(<<ENDGRDS);
355: menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")');
356: ENDGRDS
357: }
358: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
359: $hwkadd.=(<<ENDPARM);
360: menu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")');
361: ENDPARM
362: }
363: }
364: $result = (<<ENDREGTHIS);
365:
366: <script language="JavaScript">
367: // BEGIN LON-CAPA Internal
368:
369: function LONCAPAreg() {
370: menu=window.open("$nothing","LONCAPAmenu","",false);
371: menu.clearTimeout(menu.menucltim);
372: $timesync
373: menu.currentURL=window.location.pathname;
374: menu.reloadURL=window.location.pathname;
375: menu.currentStale=0;
376: menu.clearbut(3,1);
377: menu.switchbutton
378: (6,3,'catalog.gif','catalog','info','catalog_info()');
379: menu.switchbutton
380: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
381: menu.switchbutton
382: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
383: menu.switchbutton
384: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
385: menu.switchbutton
386: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
387: menu.switchbutton
388: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
389: menu.switchbutton
390: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
391: menu.switchbutton
392: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
393: menu.switchbutton
394: (9,3,'anot.gif','anno-','tations','annotate()');
395: $hwkadd
396: }
397:
398: function LONCAPAstale() {
399: menu=window.open("$nothing","LONCAPAmenu","",false);
400: menu.currentStale=1;
401: if (menu.reloadURL!='' && menu.reloadURL!= null) {
402: menu.switchbutton
403: (3,1,'reload.gif','return','location','go(reloadURL)');
404: }
405: menu.clearbut(7,1);
406: menu.clearbut(7,2);
407: menu.clearbut(7,3);
408: menu.menucltim=menu.setTimeout(
409: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
410: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
411: 2000);
412:
413: }
414:
415: // END LON-CAPA Internal
416: </script>
417: ENDREGTHIS
418:
419: } else {
420: $result = (<<ENDDONOTREGTHIS);
421:
422: <script language="JavaScript">
423: // BEGIN LON-CAPA Internal
424:
425: function LONCAPAreg() {
426: menu=window.open("$nothing","LONCAPAmenu","",false);
427: $timesync
428: menu.currentStale=1;
429: menu.clearbut(2,1);
430: menu.clearbut(2,3);
431: menu.clearbut(8,1);
432: menu.clearbut(8,2);
433: menu.clearbut(8,3);
434: if (menu.currentURL) {
435: menu.switchbutton
436: (3,1,'reload.gif','return','location','go(currentURL)');
437: } else {
438: menu.clearbut(3,1);
439: }
440: }
441:
442: function LONCAPAstale() {
443: }
444:
445: // END LON-CAPA Internal
446: </script>
447: ENDDONOTREGTHIS
448: }
449: if ($target eq 'edit') {
450: # Javascript routines for construction space:
451: # openbrowser and opensearcher will start the file browser
452: # (lonindexer) and searcher (lonsearchcat) respectively.
453: # Inputs are the name of the html form being used
454: # and the name of the element the selected URL should
455: # be placed in.
456: # openbrowser also takes arguments only and omit, which are
457: # comma deliminated lists of file extensions to (only) show
458: # or omit.
459: # Here we also set currentURL=null.
460: $result .=<<"ENDBROWSERSCRIPT";
461: <script>
462: menu.currentURL=null;
463: var editbrowser;
464: function openbrowser(formname,elementname,only,omit) {
465: var url = '/res/?';
466: if (editbrowser == null) {
467: url += 'launch=1&';
468: }
469: url += 'catalogmode=interactive&';
470: url += 'mode=edit&';
471: url += 'form=' + formname + '&';
472: if (only != null) {
473: url += 'only=' + only + '&';
474: }
475: if (omit != null) {
476: url += 'omit=' + omit + '&';
477: }
478: url += 'element=' + elementname + '';
479: var title = 'Browser';
480: var options = 'scrollbars=1,resizable=1,menubar=0';
481: options += ',width=700,height=600';
482: editbrowser = open(url,title,options,'1');
483: editbrowser.focus();
484: }
485: var editsearcher;
486: function opensearcher(formname,elementname) {
487: var url = '/adm/searchcat?';
488: if (editsearcher == null) {
489: url += 'launch=1&';
490: }
491: url += 'catalogmode=interactive&';
492: url += 'mode=edit&';
493: url += 'form=' + formname + '&';
494: url += 'element=' + elementname + '';
495: var title = 'Search';
496: var options = 'scrollbars=1,resizable=1,menubar=0';
497: options += ',width=700,height=600';
498: editsearcher = open(url,title,options,'1');
499: editsearcher.focus();
500: }
501: </script>
502: ENDBROWSERSCRIPT
503: }
504: return $result;
505: }
506:
507: sub loadevents() {
508: return 'LONCAPAreg();';
509: }
510:
511: sub unloadevents() {
512: return 'LONCAPAstale();';
513: }
514:
515: sub printalltags {
516: my $temp;
517: foreach $temp (sort keys %Apache::lonxml::alltags) {
518: &Apache::lonxml::debug("$temp -- ".
519: join(',',@{ $Apache::lonxml::alltags{$temp} }));
520: }
521: }
522:
523: sub xmlparse {
524: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
525:
526: &setup_globals($request,$target);
527: #
528: # do we have a course style file?
529: #
530:
531: if ($ENV{'request.course.id'}) {
532: my $bodytext=
533: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
534: if ($bodytext) {
535: my $location=&Apache::lonnet::filelocation('',$bodytext);
536: my $styletext=&Apache::lonnet::getfile($location);
537: if ($styletext ne '-1') {
538: %style_for_target = (%style_for_target,
539: &Apache::style::styleparser($target,$styletext));
540: }
541: }
542: }
543:
544: #&printalltags();
545: my @pars = ();
546: my $pwd=$ENV{'request.filename'};
547: $pwd =~ s:/[^/]*$::;
548: &newparser(\@pars,\$content_file_string,$pwd);
549:
550: my $safeeval = new Safe;
551: my $safehole = new Safe::Hole;
552: &init_safespace($target,$safeeval,$safehole,$safeinit);
553: #-------------------- Redefinition of the target in the case of compound target
554:
555: ($target, my @tenta) = split('&&',$target);
556:
557: my @stack = ();
558: my @parstack = ();
559: &initdepth;
560:
561: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
562: $safeeval,\%style_for_target);
563: if ($ENV{'request.uri'}) {
564: &writeallows($ENV{'request.uri'});
565: }
566: return $finaloutput;
567: }
568:
569: sub htmlclean {
570: my ($raw,$full)=@_;
571:
572: my $tree = HTML::TreeBuilder->new;
573: $tree->ignore_unknown(0);
574:
575: $tree->parse($raw);
576:
577: my $output= $tree->as_HTML(undef,' ');
578:
579: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
580: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
581: unless ($full) {
582: $output=~s/\<[\/]*(body|head|html)\>//gis;
583: }
584:
585: $tree = $tree->delete;
586:
587: return $output;
588: }
589:
590: sub inner_xmlparse {
591: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
592: my $finaloutput = '';
593: my $result;
594: my $token;
595: while ( $#$pars > -1 ) {
596: while ($token = $$pars['-1']->get_token) {
597: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
598: if ($metamode<1) {
599: $result=$token->[1];
600: }
601: } elsif ($token->[0] eq 'PI') {
602: if ($metamode<1) {
603: $result=$token->[2];
604: }
605: } elsif ($token->[0] eq 'S') {
606: # add tag to stack
607: push (@$stack,$token->[1]);
608: # add parameters list to another stack
609: push (@$parstack,&parstring($token));
610: &increasedepth($token);
611: if (exists $$style_for_target{$token->[1]}) {
612: if ($Apache::lonxml::redirection) {
613: $Apache::lonxml::outputstack['-1'] .=
614: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
615: $style_for_target,@$parstack);
616: } else {
617: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
618: $safeeval,$style_for_target,@$parstack);
619: }
620: } else {
621: $result = &callsub("start_$token->[1]", $target, $token, $stack,
622: $parstack, $pars, $safeeval, $style_for_target);
623: }
624: } elsif ($token->[0] eq 'E') {
625: #clear out any tags that didn't end
626: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
627: my $lasttag=$$stack[-1];
628: if ($token->[1] =~ /^$lasttag$/i) {
629: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
630: last;
631: } else {
632: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
633: &end_tag($stack,$parstack,$token);
634: }
635: }
636:
637: if (exists($$style_for_target{'/'."$token->[1]"})) {
638: if ($Apache::lonxml::redirection) {
639: $Apache::lonxml::outputstack['-1'] .=
640: &recurse($$style_for_target{'/'."$token->[1]"},
641: $target,$safeeval,$style_for_target,@$parstack);
642: } else {
643: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
644: $target,$safeeval,$style_for_target,
645: @$parstack);
646: }
647: } else {
648: $result = &callsub("end_$token->[1]", $target, $token, $stack,
649: $parstack, $pars,$safeeval, $style_for_target);
650: }
651: } else {
652: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
653: }
654: #evaluate variable refs in result
655: if ($result ne "") {
656: if ( $#$parstack > -1 ) {
657: $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
658: } else {
659: $result= &Apache::run::evaluate($result,$safeeval,'');
660: }
661: }
662: # Encode any high ASCII characters
663: if (!$Apache::lonxml::prevent_entity_encode) {
664: $result=&HTML::Entities::encode($result,"\200-\377");
665: }
666: if ($Apache::lonxml::redirection) {
667: $Apache::lonxml::outputstack['-1'] .= $result;
668: } else {
669: $finaloutput.=$result;
670: }
671: $result = '';
672:
673: if ($token->[0] eq 'E') {
674: &end_tag($stack,$parstack,$token);
675: }
676: }
677: pop @$pars;
678: pop @Apache::lonxml::pwd;
679: }
680:
681: # if ($target eq 'meta') {
682: # $finaloutput.=&endredirection;
683: # }
684:
685:
686: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
687: $finaloutput=&afterburn($finaloutput);
688: }
689: return $finaloutput;
690: }
691:
692: sub recurse {
693: my @innerstack = ();
694: my @innerparstack = ();
695: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
696: my @pat = ();
697: &newparser(\@pat,\$newarg);
698: my $tokenpat;
699: my $partstring = '';
700: my $output='';
701: my $decls='';
702: &Apache::lonxml::debug("Recursing");
703: while ( $#pat > -1 ) {
704: while ($tokenpat = $pat[$#pat]->get_token) {
705: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
706: if ($metamode<1) { $partstring=$tokenpat->[1]; }
707: } elsif ($tokenpat->[0] eq 'PI') {
708: if ($metamode<1) { $partstring=$tokenpat->[2]; }
709: } elsif ($tokenpat->[0] eq 'S') {
710: push (@innerstack,$tokenpat->[1]);
711: push (@innerparstack,&parstring($tokenpat));
712: &increasedepth($tokenpat);
713: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
714: \@innerstack, \@innerparstack, \@pat,
715: $safeeval, $style_for_target);
716: } elsif ($tokenpat->[0] eq 'E') {
717: #clear out any tags that didn't end
718: while ($tokenpat->[1] ne $innerstack[$#innerstack]
719: && ($#innerstack > -1)) {
720: my $lasttag=$innerstack[-1];
721: if ($tokenpat->[1] =~ /^$lasttag$/i) {
722: &Apache::lonxml::warning('Using tag </'.$tokenpat->[1].'> as end tag to <'.$innerstack[-1].'>');
723: last;
724: } else {
725: &Apache::lonxml::warning('Found tag </'.$tokenpat->[1].'> when looking for </'.$innerstack[-1].'> in file');
726: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
727: }
728: }
729: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
730: \@innerstack, \@innerparstack, \@pat,
731: $safeeval, $style_for_target);
732: } else {
733: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
734: }
735: #pass both the variable to the style tag, and the tag we
736: #are processing inside the <definedtag>
737: if ( $partstring ne "" ) {
738: if ( $#parstack > -1 ) {
739: if ( $#innerparstack > -1 ) {
740: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
741: } else {
742: $decls= $parstack[$#parstack];
743: }
744: } else {
745: if ( $#innerparstack > -1 ) {
746: $decls=$innerparstack[$#innerparstack];
747: } else {
748: $decls='';
749: }
750: }
751: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
752: $partstring = '';
753: }
754: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
755: &decreasedepth($tokenpat);}
756: }
757: pop @pat;
758: pop @Apache::lonxml::pwd;
759: }
760: &Apache::lonxml::debug("Exiting Recursing");
761: return $output;
762: }
763:
764: sub callsub {
765: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
766: my $currentstring='';
767: my $nodefault;
768: {
769: my $sub1;
770: no strict 'refs';
771: my $tag=$token->[1];
772: my $space=$Apache::lonxml::alltags{$tag}[-1];
773: if (!$space) {
774: $tag=~tr/A-Z/a-z/;
775: $sub=~tr/A-Z/a-z/;
776: $space=$Apache::lonxml::alltags{$tag}[-1]
777: }
778:
779: my $deleted=0;
780: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
781: if (($token->[0] eq 'S') && ($target eq 'modified')) {
782: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
783: $parstack,$parser,$safeeval,
784: $style);
785: }
786: if (!$deleted) {
787: if ($space) {
788: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
789: $sub1="$space\:\:$sub";
790: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
791: $parstack,$parser,$safeeval,
792: $style);
793: } else {
794: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
795: if ($metamode <1) {
796: if (defined($token->[4]) && ($metamode < 1)) {
797: $currentstring = $token->[4];
798: } else {
799: $currentstring = $token->[2];
800: }
801: }
802: }
803: # &Apache::lonxml::debug("nodefalt:$nodefault:");
804: if ($currentstring eq '' && $nodefault eq '') {
805: if ($target eq 'edit') {
806: &Apache::lonxml::debug("doing default edit for $token->[1]");
807: if ($token->[0] eq 'S') {
808: $currentstring = &Apache::edit::tag_start($target,$token);
809: } elsif ($token->[0] eq 'E') {
810: $currentstring = &Apache::edit::tag_end($target,$token);
811: }
812: } elsif ($target eq 'modified') {
813: if ($token->[0] eq 'S') {
814: $currentstring = $token->[4];
815: $currentstring.=&Apache::edit::handle_insert();
816: } else {
817: $currentstring = $token->[2];
818: }
819: }
820: }
821: }
822: use strict 'refs';
823: }
824: return $currentstring;
825: }
826:
827: sub setup_globals {
828: my ($request,$target)=@_;
829: $Apache::lonxml::request=$request;
830: $Apache::lonxml::registered = 0;
831: @Apache::lonxml::pwd=();
832: @Apache::lonxml::extlinks=();
833: if ($target eq 'meta') {
834: $Apache::lonxml::redirection = 0;
835: $Apache::lonxml::metamode = 1;
836: $Apache::lonxml::evaluate = 1;
837: $Apache::lonxml::import = 0;
838: } elsif ($target eq 'answer') {
839: $Apache::lonxml::redirection = 0;
840: $Apache::lonxml::metamode = 1;
841: $Apache::lonxml::evaluate = 1;
842: $Apache::lonxml::import = 1;
843: } elsif ($target eq 'grade') {
844: &startredirection;
845: $Apache::lonxml::metamode = 0;
846: $Apache::lonxml::evaluate = 1;
847: $Apache::lonxml::import = 1;
848: } elsif ($target eq 'modified') {
849: $Apache::lonxml::redirection = 0;
850: $Apache::lonxml::metamode = 0;
851: $Apache::lonxml::evaluate = 0;
852: $Apache::lonxml::import = 0;
853: } elsif ($target eq 'edit') {
854: $Apache::lonxml::redirection = 0;
855: $Apache::lonxml::metamode = 0;
856: $Apache::lonxml::evaluate = 0;
857: $Apache::lonxml::import = 0;
858: } elsif ($target eq 'analyze') {
859: $Apache::lonxml::redirection = 0;
860: $Apache::lonxml::metamode = 0;
861: $Apache::lonxml::evaluate = 1;
862: $Apache::lonxml::import = 1;
863: } else {
864: $Apache::lonxml::redirection = 0;
865: $Apache::lonxml::metamode = 0;
866: $Apache::lonxml::evaluate = 1;
867: $Apache::lonxml::import = 1;
868: }
869: }
870:
871: sub init_safespace {
872: my ($target,$safeeval,$safehole,$safeinit) = @_;
873: $safeeval->permit("entereval");
874: $safeeval->permit(":base_math");
875: $safeeval->permit("sort");
876: $safeeval->deny(":base_io");
877: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
878: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
879:
880: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
881: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
882: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
883: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
884: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
885: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
886: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
887: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
888: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
889: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
890: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
891: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
892: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
893: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
894: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
895: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
896: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
897: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
898: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
899: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
900: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
901: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
902: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
903: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
904: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
905: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
906: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
907: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
908: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
909: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
910: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
911: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
912: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
913: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
914: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
915: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
916: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
917: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
918: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
919: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
920:
921: #need to inspect this class of ops
922: # $safeeval->deny(":base_orig");
923: $safeinit .= ';$external::target="'.$target.'";';
924: my $rndseed;
925: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
926: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
927: $safeinit .= ';$external::randomseed='.$rndseed.';';
928: &Apache::run::run($safeinit,$safeeval);
929: }
930:
931: sub startredirection {
932: $Apache::lonxml::redirection++;
933: push (@Apache::lonxml::outputstack, '');
934: }
935:
936: sub endredirection {
937: if (!$Apache::lonxml::redirection) {
938: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
939: return '';
940: }
941: $Apache::lonxml::redirection--;
942: pop @Apache::lonxml::outputstack;
943: }
944:
945: sub end_tag {
946: my ($tagstack,$parstack,$token)=@_;
947: pop(@$tagstack);
948: pop(@$parstack);
949: &decreasedepth($token);
950: }
951:
952: sub initdepth {
953: @Apache::lonxml::depthcounter=();
954: $Apache::lonxml::depth=-1;
955: $Apache::lonxml::olddepth=-1;
956: }
957:
958: sub increasedepth {
959: my ($token) = @_;
960: $Apache::lonxml::depth++;
961: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
962: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
963: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
964: }
965: my $curdepth=join('_',@Apache::lonxml::depthcounter);
966: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
967: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
968: }
969:
970: sub decreasedepth {
971: my ($token) = @_;
972: $Apache::lonxml::depth--;
973: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
974: $#Apache::lonxml::depthcounter--;
975: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
976: }
977: if ( $Apache::lonxml::depth < -1) {
978: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
979: $Apache::lonxml::depth='-1';
980: }
981: my $curdepth=join('_',@Apache::lonxml::depthcounter);
982: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
983: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
984: }
985:
986: sub get_all_text {
987:
988: my($tag,$pars)= @_;
989: my $depth=0;
990: my $token;
991: my $result='';
992: if ( $tag =~ m:^/: ) {
993: my $tag=substr($tag,1);
994: # &Apache::lonxml::debug("have:$tag:");
995: while (($depth >=0) && ($token = $pars->get_token)) {
996: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
997: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
998: $result.=$token->[1];
999: } elsif ($token->[0] eq 'PI') {
1000: $result.=$token->[2];
1001: } elsif ($token->[0] eq 'S') {
1002: if ($token->[1] =~ /^$tag$/i) { $depth++; }
1003: $result.=$token->[4];
1004: } elsif ($token->[0] eq 'E') {
1005: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
1006: #skip sending back the last end tag
1007: if ($depth > -1) { $result.=$token->[2]; } else {
1008: $pars->unget_token($token);
1009: }
1010: }
1011: }
1012: } else {
1013: while ($token = $pars->get_token) {
1014: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1015: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1016: $result.=$token->[1];
1017: } elsif ($token->[0] eq 'PI') {
1018: $result.=$token->[2];
1019: } elsif ($token->[0] eq 'S') {
1020: if ( $token->[1] =~ /^$tag$/i) {
1021: $pars->unget_token($token); last;
1022: } else {
1023: $result.=$token->[4];
1024: }
1025: } elsif ($token->[0] eq 'E') {
1026: $result.=$token->[2];
1027: }
1028: }
1029: }
1030: # &Apache::lonxml::debug("Exit:$result:");
1031: return $result
1032: }
1033:
1034: sub newparser {
1035: my ($parser,$contentref,$dir) = @_;
1036: push (@$parser,HTML::LCParser->new($contentref));
1037: $$parser['-1']->xml_mode('1');
1038: if ( $dir eq '' ) {
1039: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1040: } else {
1041: push (@Apache::lonxml::pwd, $dir);
1042: }
1043: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
1044: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
1045: }
1046:
1047: sub parstring {
1048: my ($token) = @_;
1049: my $temp='';
1050: foreach (@{$token->[3]}) {
1051: unless ($_=~/\W/) {
1052: my $val=$token->[2]->{$_};
1053: $val =~ s/([\%\@\\\"])/\\$1/g;
1054: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1055: $temp .= "my \$$_=\"$val\";"
1056: }
1057: }
1058: return $temp;
1059: }
1060:
1061: sub writeallows {
1062: unless ($#extlinks>=0) { return; }
1063: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1064: if ($ENV{'httpref.'.$thisurl}) {
1065: $thisurl=$ENV{'httpref.'.$thisurl};
1066: }
1067: my $thisdir=$thisurl;
1068: $thisdir=~s/\/[^\/]+$//;
1069: my %httpref=();
1070: foreach (@extlinks) {
1071: $httpref{'httpref.'.
1072: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1073: }
1074: @extlinks=();
1075: &Apache::lonnet::appenv(%httpref);
1076: }
1077:
1078: #
1079: # Afterburner handles anchors, highlights and links
1080: #
1081: sub afterburn {
1082: my $result=shift;
1083: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1084: ['highlight','anchor','link']);
1085: if ($ENV{'form.highlight'}) {
1086: foreach (split(/\,/,$ENV{'form.highlight'})) {
1087: my $anchorname=$_;
1088: my $matchthis=$anchorname;
1089: $matchthis=~s/\_+/\\s\+/g;
1090: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1091: }
1092: }
1093: if ($ENV{'form.link'}) {
1094: foreach (split(/\,/,$ENV{'form.link'})) {
1095: my ($anchorname,$linkurl)=split(/\>/,$_);
1096: my $matchthis=$anchorname;
1097: $matchthis=~s/\_+/\\s\+/g;
1098: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1099: }
1100: }
1101: if ($ENV{'form.anchor'}) {
1102: my $anchorname=$ENV{'form.anchor'};
1103: my $matchthis=$anchorname;
1104: $matchthis=~s/\_+/\\s\+/g;
1105: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1106: $result.=(<<"ENDSCRIPT");
1107: <script>
1108: document.location.hash='$anchorname';
1109: </script>
1110: ENDSCRIPT
1111: }
1112: return $result;
1113: }
1114:
1115: sub storefile {
1116: my ($file,$contents)=@_;
1117: if (my $fh=Apache::File->new('>'.$file)) {
1118: print $fh $contents;
1119: $fh->close();
1120: } else {
1121: &warning("Unable to save file $file");
1122: }
1123: }
1124:
1125: sub createnewhtml {
1126: my $filecontents=(<<SIMPLECONTENT);
1127: <html>
1128: <head>
1129: <title>
1130: Title of Document Goes Here
1131: </title>
1132: </head>
1133: <body bgcolor="#FFFFFF">
1134:
1135: Body of Document Goes Here
1136:
1137: </body>
1138: </html>
1139: SIMPLECONTENT
1140: return $filecontents;
1141: }
1142:
1143:
1144: sub inserteditinfo {
1145: my ($result,$filecontents)=@_;
1146: $filecontents = &HTML::Entities::encode($filecontents);
1147: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1148: my $buttons=(<<BUTTONS);
1149: <input type="submit" name="attemptclean"
1150: value="Save and then attempt to clean HTML" />
1151: <input type="submit" name="savethisfile" value="Save this" />
1152: <input type="submit" name="viewmode" value="View" />
1153: BUTTONS
1154: my $editfooter=(<<ENDFOOTER);
1155: <hr />
1156: <a name="editsection" />
1157: <form method="post">
1158: <input type="hidden" name="editmode" value="Edit" />
1159: $buttons<br />
1160: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1161: <br />$buttons
1162: <br />
1163: </form>
1164: ENDFOOTER
1165: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1166: $result=~s/(\<\/body\>)/$editfooter/is;
1167: return $result;
1168: }
1169:
1170: sub get_target {
1171: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1172: if ( $ENV{'request.state'} eq 'published') {
1173: if ( defined($ENV{'form.grade_target'})
1174: && ($viewgrades == 'F' )) {
1175: return ($ENV{'form.grade_target'});
1176: } elsif (defined($ENV{'form.grade_target'})) {
1177: if (($ENV{'form.grade_target'} eq 'web') ||
1178: ($ENV{'form.grade_target'} eq 'tex') ) {
1179: return $ENV{'form.grade_target'}
1180: } else {
1181: return 'web';
1182: }
1183: } else {
1184: return 'web';
1185: }
1186: } elsif ($ENV{'request.state'} eq 'construct') {
1187: if ( defined($ENV{'form.grade_target'})) {
1188: return ($ENV{'form.grade_target'});
1189: } else {
1190: return 'web';
1191: }
1192: } else {
1193: return 'web';
1194: }
1195: }
1196:
1197: sub handler {
1198: my $request=shift;
1199:
1200: my $target=&get_target();
1201:
1202: $Apache::lonxml::debug=0;
1203:
1204: if ($ENV{'browser.mathml'}) {
1205: $request->content_type('text/xml');
1206: } else {
1207: $request->content_type('text/html');
1208: }
1209: &Apache::loncommon::no_cache($request);
1210: $request->send_http_header;
1211:
1212: return OK if $request->header_only;
1213:
1214:
1215: my $file=&Apache::lonnet::filelocation("",$request->uri);
1216: #
1217: # Edit action? Save file.
1218: #
1219: unless ($ENV{'request.state'} eq 'published') {
1220: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1221: &storefile($file,$ENV{'form.filecont'});
1222: }
1223: }
1224: my %mystyle;
1225: my $result = '';
1226: my $filecontents=&Apache::lonnet::getfile($file);
1227: if ($filecontents == -1) {
1228: $result=(<<ENDNOTFOUND);
1229: <html>
1230: <head>
1231: <title>File not found</title>
1232: </head>
1233: <body bgcolor="#FFFFFF">
1234: <b>File not found: $file</b>
1235: </body>
1236: </html>
1237: ENDNOTFOUND
1238: $filecontents='';
1239: if ($ENV{'request.state'} ne 'published') {
1240: $filecontents=&createnewhtml();
1241: $ENV{'form.editmode'}='Edit'; #force edit mode
1242: }
1243: } else {
1244: unless ($ENV{'request.state'} eq 'published') {
1245: if ($ENV{'form.attemptclean'}) {
1246: $filecontents=&htmlclean($filecontents,1);
1247: }
1248: }
1249: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1250: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1251: '',%mystyle);
1252: }
1253: }
1254:
1255: #
1256: # Edit action? Insert editing commands
1257: #
1258: unless ($ENV{'request.state'} eq 'published') {
1259: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1260: my $displayfile=$request->uri;
1261: $displayfile=~s/^\/[^\/]*//;
1262: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1263: '</h3></body></html>';
1264: $result=&inserteditinfo($result,$filecontents);
1265: }
1266: }
1267:
1268: writeallows($request->uri);
1269:
1270: $request->print($result);
1271:
1272: return OK;
1273: }
1274:
1275: sub debug {
1276: if ($Apache::lonxml::debug eq 1) {
1277: $|=1;
1278: print("DEBUG:".join('<br />',@_)."<br />\n");
1279: }
1280: }
1281:
1282: sub error {
1283: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1284: # If printing in construction space, put the error inside <pre></pre>
1285: print "<b>ERROR:</b>".join("\n",@_)."\n";
1286: } else {
1287: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1288: #notify author
1289: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1290: #notify course
1291: if ( $ENV{'request.course.id'} ) {
1292: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1293: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1294: foreach my $user (split /\,/, $users) {
1295: ($user,my $domain) = split /:/, $user;
1296: &Apache::lonmsg::user_normal_msg($user,$domain,
1297: "Error [$declutter]",join('<br />',@_));
1298: }
1299: }
1300:
1301: #FIXME probably shouldn't have me get everything forever.
1302: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1303: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1304: }
1305: }
1306:
1307: sub warning {
1308: if ($ENV{'request.state'} eq 'construct') {
1309: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1310: }
1311: }
1312:
1313: sub get_param {
1314: my ($param,$parstack,$safeeval,$context) = @_;
1315: if ( ! $context ) { $context = -1; }
1316: my $args ='';
1317: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1318: if ( ! $args ) { return undef; }
1319: if ( $args =~ /my \$$param=\"/ ) {
1320: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1321: } else {
1322: return undef;
1323: }
1324: }
1325:
1326: sub get_param_var {
1327: my ($param,$parstack,$safeeval,$context) = @_;
1328: if ( ! $context ) { $context = -1; }
1329: my $args ='';
1330: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1331: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1332: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1333: if ($value =~ /^[\$\@\%]/) {
1334: return &Apache::run::run("return $value",$safeeval,1);
1335: } else {
1336: return $value;
1337: }
1338: }
1339:
1340: sub register_insert {
1341: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1342: my $i;
1343: my $tagnum=0;
1344: my @order;
1345: for ($i=0;$i < $#data; $i++) {
1346: my $line = $data[$i];
1347: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1348: if ( $line =~ /TABLE/ ) { last; }
1349: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1350: if ($tag) {
1351: $insertlist{"$tagnum.tag"} = $tag;
1352: $insertlist{"$tagnum.description"} = $descrip;
1353: $insertlist{"$tagnum.color"} = $color;
1354: $insertlist{"$tagnum.function"} = $function;
1355: if (!defined($show)) { $show='yes'; }
1356: $insertlist{"$tagnum.show"}= $show;
1357: $insertlist{"$tag.num"}=$tagnum;
1358: $tagnum++;
1359: }
1360: }
1361: $i++; #skipping TABLE line
1362: $tagnum = 0;
1363: for (;$i < $#data;$i++) {
1364: my $line = $data[$i];
1365: my ($mnemonic,@which) = split(/ +/,$line);
1366: my $tag = $insertlist{"$tagnum.tag"};
1367: for (my $j=0;$j <=$#which;$j++) {
1368: if ( $which[$j] eq 'Y' ) {
1369: if ($insertlist{"$j.show"} ne 'no') {
1370: push(@{ $insertlist{"$tag.which"} },$j);
1371: }
1372: }
1373: }
1374: $tagnum++;
1375: }
1376: }
1377:
1378: sub description {
1379: my ($token)=@_;
1380: my $tagnum;
1381: my $tag=$token->[1];
1382: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1383: my $testtag=$namespace.'::'.$tag;
1384: $tagnum=$insertlist{"$testtag.num"};
1385: if (defined($tagnum)) { last; }
1386: }
1387: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1388: return $insertlist{$tagnum.'.description'};
1389: }
1390:
1391: # ----------------------------------------------------------------- whichuser
1392: # returns a list of $symb, $courseid, $domain, $name that is correct for
1393: # calls to lonnet functions for this setup.
1394: # - looks for form.grade_ parameters
1395: sub whichuser {
1396: my ($symb,$courseid,$domain,$name);
1397: if (defined($ENV{'form.grade_symb'})) {
1398: my $tmp_courseid=$ENV{'form.grade_courseid'};
1399: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1400: if ($allowed) {
1401: $symb=$ENV{'form.grade_symb'};
1402: $courseid=$ENV{'form.grade_courseid'};
1403: $domain=$ENV{'form.grade_domain'};
1404: $name=$ENV{'form.grade_username'};
1405: }
1406: } else {
1407: $symb=&Apache::lonnet::symbread();
1408: $courseid=$ENV{'request.course.id'};
1409: $domain=$ENV{'user.domain'};
1410: $name=$ENV{'user.name'};
1411: }
1412: return ($symb,$courseid,$domain,$name);
1413: }
1414:
1415: 1;
1416: __END__
1417:
1418:
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