1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.205 2002/10/20 18:42:53 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 $errorcount $warningcount);
64: use strict;
65: use HTML::LCParser();
66: use HTML::TreeBuilder();
67: use HTML::Entities();
68: use Safe();
69: use Safe::Hole();
70: use Math::Cephes();
71: use Math::Random();
72: use Opcode();
73:
74: sub register {
75: my ($space,@taglist) = @_;
76: foreach my $temptag (@taglist) {
77: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
78: }
79: }
80:
81: sub deregister {
82: my ($space,@taglist) = @_;
83: foreach my $temptag (@taglist) {
84: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
85: if ($tempspace eq $space) {
86: pop(@{ $Apache::lonxml::alltags{$temptag} });
87: }
88: }
89: #&printalltags();
90: }
91:
92: use Apache::Constants qw(:common);
93: use Apache::lontexconvert();
94: use Apache::style();
95: use Apache::run();
96: use Apache::londefdef();
97: use Apache::scripttag();
98: use Apache::edit();
99: use Apache::lonnet();
100: use Apache::File();
101: use Apache::loncommon();
102: use Apache::lonfeedback();
103: use Apache::lonmsg();
104:
105: #================================================== Main subroutine: xmlparse
106: #debugging control, to turn on debugging modify the correct handler
107: $Apache::lonxml::debug=0;
108:
109: #path to the directory containing the file currently being processed
110: @pwd=();
111:
112: #these two are used for capturing a subset of the output for later processing,
113: #don't touch them directly use &startredirection and &endredirection
114: @outputstack = ();
115: $redirection = 0;
116:
117: #controls wheter the <import> tag actually does
118: $import = 1;
119: @extlinks=();
120:
121: # meta mode is a bit weird only some output is to be turned off
122: #<output> tag turns metamode off (defined in londefdef.pm)
123: $metamode = 0;
124:
125: # turns on and of run::evaluate actually derefencing var refs
126: $evaluate = 1;
127:
128: # data structure for eidt mode, determines what tags can go into what other tags
129: %insertlist=();
130:
131: # stores the list of active tag namespaces
132: @namespace=();
133:
134: # if 0 all high ASCII characters will be encoded into HTML Entities
135: $prevent_entity_encode=0;
136:
137: # has the dynamic menu been updated to know about this resource
138: $Apache::lonxml::registered=0;
139:
140: # a pointer the the Apache request object
141: $Apache::lonxml::request='';
142:
143: # a problem number counter, and check on hether it is used
144: $Apache::lonxml::counter=0;
145: $Apache::lonxml::counter_changed=0;
146:
147: sub xmlbegin {
148: my $output='';
149: if ($ENV{'browser.mathml'}) {
150: $output='<?xml version="1.0"?>'
151: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
152: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
153: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
154: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
155: .'xmlns="http://www.w3.org/TR/REC-html40">';
156: } else {
157: $output='<html>';
158: }
159: return $output;
160: }
161:
162: sub xmlend {
163: my ($discussiononly,$symb)=@_;
164: my $discussion='';
165: if ($ENV{'request.course.id'}) {
166: my $crs='/'.$ENV{'request.course.id'};
167: if ($ENV{'request.course.sec'}) {
168: $crs.='_'.$ENV{'request.course.sec'};
169: }
170: $crs=~s/\_/\//g;
171: my $seeid=&Apache::lonnet::allowed('rin',$crs);
172: unless ($symb) {
173: $symb=&Apache::lonnet::symbread();
174: }
175: if ($symb) {
176: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
177: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
178: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
179: if ($contrib{'version'}) {
180: unless ($discussiononly) {
181: $discussion.=
182: '<address><hr />';
183: }
184: my $idx;
185: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
186: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
187: unless (($hidden) && (!$seeid)) {
188: my $message=$contrib{$idx.':message'};
189: $message=~s/\n/\<br \/\>/g;
190: $message=&Apache::lontexconvert::msgtexconverted($message);
191: if ($message) {
192: if ($hidden) {
193: $message='<font color="#888888">'.$message.'</font>';
194: }
195: my $screenname=&Apache::loncommon::screenname(
196: $contrib{$idx.':sendername'},
197: $contrib{$idx.':senderdomain'});
198: my $plainname=&Apache::loncommon::nickname(
199: $contrib{$idx.':sendername'},
200: $contrib{$idx.':senderdomain'});
201:
202: my $sender='Anonymous';
203: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
204: $sender=&Apache::loncommon::aboutmewrapper(
205: $plainname,
206: $contrib{$idx.':sendername'},
207: $contrib{$idx.':senderdomain'}).' ('.
208: $contrib{$idx.':sendername'}.' at '.
209: $contrib{$idx.':senderdomain'}.')';
210: if ($contrib{$idx.':anonymous'}) {
211: $sender.=' [anonymous] '.
212: $screenname;
213: }
214: if ($seeid) {
215: if ($hidden) {
216: $sender.=' <a href="/adm/feedback?unhide='.
217: $symb.':::'.$idx.'">Make Visible</a>';
218: } else {
219: $sender.=' <a href="/adm/feedback?hide='.
220: $symb.':::'.$idx.'">Hide</a>';
221: }
222: }
223: } else {
224: if ($screenname) {
225: $sender='<i>'.$screenname.'</i>';
226: }
227: }
228: $discussion.='<p><b>'.$sender.'</b> ('.
229: localtime($contrib{$idx.':timestamp'}).
230: '):<blockquote>'.$message.
231: '</blockquote></p>';
232: }
233: }
234: }
235: unless ($discussiononly) {
236: $discussion.='</address>';
237: }
238: }
239: if ($discussiononly) {
240: $discussion.=(<<ENDDISCUSS);
241: <form action="/adm/feedback" method="post" name="mailform">
242: <input type="submit" name="discuss" value="Post Discussion" />
243: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
244: <input type="hidden" name="symb" value="$symb" />
245: <input type="hidden" name="sendit" value="true" />
246: <br />
247: <font size="1">Note: in anonymous discussion, your name is visible only to
248: course faculty</font><br />
249: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
250: </form>
251: ENDDISCUSS
252: $discussion.=&Apache::lonfeedback::generate_preview_button();
253: }
254: }
255: }
256: return $discussion.($discussiononly?'':'</html>');
257: }
258:
259: sub tokeninputfield {
260: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
261: $defhost=~tr/a-z/A-Z/;
262: return (<<ENDINPUTFIELD)
263: <script>
264: function updatetoken() {
265: var comp=new Array;
266: var barcode=unescape(document.tokeninput.barcode.value);
267: comp=barcode.split('*');
268: if (typeof(comp[0])!="undefined") {
269: document.tokeninput.codeone.value=comp[0];
270: }
271: if (typeof(comp[1])!="undefined") {
272: document.tokeninput.codetwo.value=comp[1];
273: }
274: if (typeof(comp[2])!="undefined") {
275: comp[2]=comp[2].toUpperCase();
276: document.tokeninput.codethree.value=comp[2];
277: }
278: document.tokeninput.barcode.value='';
279: }
280: </script>
281: <form method="post" name="tokeninput">
282: <table border="2" bgcolor="#FFFFBB">
283: <tr><th>DocID Checkin</th></tr>
284: <tr><td>
285: <table>
286: <tr>
287: <td>Scan in Barcode</td>
288: <td><input type="text" size="22" name="barcode"
289: onChange="updatetoken()"/></td>
290: </tr>
291: <tr><td><i>or</i> Type in DocID</td>
292: <td>
293: <input type="text" size="5" name="codeone" />
294: <b><font size="+2">*</font></b>
295: <input type="text" size="5" name="codetwo" />
296: <b><font size="+2">*</font></b>
297: <input type="text" size="10" name="codethree" value="$defhost"
298: onChange="this.value=this.value.toUpperCase()" />
299: </td></tr>
300: </table>
301: </td></tr>
302: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
303: </table>
304: </form>
305: ENDINPUTFIELD
306: }
307:
308: sub maketoken {
309: my ($symb,$tuname,$tudom,$tcrsid)=@_;
310: unless ($symb) {
311: $symb=&Apache::lonnet::symbread();
312: }
313: unless ($tuname) {
314: $tuname=$ENV{'user.name'};
315: $tudom=$ENV{'user.domain'};
316: $tcrsid=$ENV{'request.course.id'};
317: }
318:
319: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
320: }
321:
322: sub printtokenheader {
323: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
324: unless ($token) { return ''; }
325:
326: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
327: unless ($tsymb) {
328: $tsymb=$symb;
329: }
330: unless ($tuname) {
331: $tuname=$name;
332: $tudom=$domain;
333: $tcrsid=$courseid;
334: }
335:
336: my %reply=&Apache::lonnet::get('environment',
337: ['firstname','middlename','lastname','generation'],
338: $tudom,$tuname);
339: my $plainname=$reply{'firstname'}.' '.
340: $reply{'middlename'}.' '.
341: $reply{'lastname'}.' '.
342: $reply{'generation'};
343:
344: if ($target eq 'web') {
345: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
346: return
347: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
348: 'Checked out for '.$plainname.
349: '<br />User: '.$tuname.' at '.$tudom.
350: '<br />ID: '.$idhash{$tuname}.
351: '<br />CourseID: '.$tcrsid.
352: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
353: '<br />DocID: '.$token.
354: '<br />Time: '.localtime().'<hr />';
355: } else {
356: return $token;
357: }
358: }
359:
360: sub fontsettings() {
361: my $headerstring='';
362: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
363: $headerstring.=
364: '<meta Content-Type="text/html; charset=x-mac-roman">';
365: }
366: return $headerstring;
367: }
368:
369: sub registerurl {
370: my $forcereg=shift;
371: my $target = shift;
372: my $result = '';
373:
374: if ($target eq 'edit') {
375: $result .="<script>\n".
376: "if (typeof menu != 'undefined') {menu.currentURL=null;}\n".
377: &Apache::loncommon::browser_and_searcher_javascript().
378: "\n</script>\n";
379: }
380: if ((($ENV{'request.publicaccess'}) ||
381: (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
382: (!$forcereg)) {
383: return $result.
384: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
385: }
386: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
387: $Apache::lonxml::registered=1;
388: my $nothing='';
389: if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; }
390: my $newmail='';
391: if (&Apache::lonmsg::newmail()) {
392: $newmail='menu.setstatus("you have","messages");';
393: }
394: my $timesync='menu.syncclock(1000*'.time.');';
395: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
396: my $hwkadd='';
397: if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
398: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
399: $hwkadd.=(<<ENDSUBM);
400: menu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")');
401: ENDSUBM
402: }
403: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
404: $hwkadd.=(<<ENDGRDS);
405: menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")');
406: ENDGRDS
407: }
408: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
409: $hwkadd.=(<<ENDPARM);
410: menu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")');
411: ENDPARM
412: }
413: }
414: $result = (<<ENDREGTHIS);
415:
416: <script language="JavaScript">
417: // BEGIN LON-CAPA Internal
418:
419: function LONCAPAreg() {
420: menu=window.open("$nothing","LONCAPAmenu","",false);
421: menu.clearTimeout(menu.menucltim);
422: $timesync
423: $newmail
424: menu.currentURL=window.location.pathname;
425: menu.reloadURL=window.location.pathname;
426: menu.currentStale=0;
427: menu.clearbut(3,1);
428: menu.switchbutton
429: (6,3,'catalog.gif','catalog','info','catalog_info()');
430: menu.switchbutton
431: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
432: menu.switchbutton
433: (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)');
434: menu.switchbutton
435: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
436: menu.switchbutton
437: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
438: menu.switchbutton
439: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
440: menu.switchbutton
441: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
442: menu.switchbutton
443: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
444: menu.switchbutton
445: (9,3,'anot.gif','anno-','tations','annotate()');
446: $hwkadd
447: }
448:
449: function LONCAPAstale() {
450: menu=window.open("$nothing","LONCAPAmenu","",false);
451: menu.currentStale=1;
452: if (menu.reloadURL!='' && menu.reloadURL!= null) {
453: menu.switchbutton
454: (3,1,'reload.gif','return','location','go(reloadURL)');
455: }
456: menu.clearbut(7,1);
457: menu.clearbut(7,2);
458: menu.clearbut(7,3);
459: menu.menucltim=menu.setTimeout(
460: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
461: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
462: 2000);
463:
464: }
465:
466: // END LON-CAPA Internal
467: </script>
468: ENDREGTHIS
469:
470: } else {
471: $result = (<<ENDDONOTREGTHIS);
472:
473: <script language="JavaScript">
474: // BEGIN LON-CAPA Internal
475:
476: function LONCAPAreg() {
477: menu=window.open("$nothing","LONCAPAmenu","",false);
478: $timesync
479: menu.currentStale=1;
480: menu.clearbut(2,1);
481: menu.clearbut(2,3);
482: menu.clearbut(8,1);
483: menu.clearbut(8,2);
484: menu.clearbut(8,3);
485: if (menu.currentURL) {
486: menu.switchbutton
487: (3,1,'reload.gif','return','location','go(currentURL)');
488: } else {
489: menu.clearbut(3,1);
490: }
491: }
492:
493: function LONCAPAstale() {
494: }
495:
496: // END LON-CAPA Internal
497: </script>
498: ENDDONOTREGTHIS
499: }
500: return $result;
501: }
502:
503: sub loadevents() {
504: return 'LONCAPAreg();';
505: }
506:
507: sub unloadevents() {
508: return 'LONCAPAstale();';
509: }
510:
511: sub printalltags {
512: my $temp;
513: foreach $temp (sort keys %Apache::lonxml::alltags) {
514: &Apache::lonxml::debug("$temp -- ".
515: join(',',@{ $Apache::lonxml::alltags{$temp} }));
516: }
517: }
518:
519: sub xmlparse {
520: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
521:
522: &setup_globals($request,$target);
523: #
524: # do we have a course style file?
525: #
526:
527: if ($ENV{'request.course.id'}) {
528: my $bodytext=
529: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
530: if ($bodytext) {
531: my $location=&Apache::lonnet::filelocation('',$bodytext);
532: my $styletext=&Apache::lonnet::getfile($location);
533: if ($styletext ne '-1') {
534: %style_for_target = (%style_for_target,
535: &Apache::style::styleparser($target,$styletext));
536: }
537: }
538: }
539:
540: #&printalltags();
541: my @pars = ();
542: my $pwd=$ENV{'request.filename'};
543: $pwd =~ s:/[^/]*$::;
544: &newparser(\@pars,\$content_file_string,$pwd);
545:
546: my $safeeval = new Safe;
547: my $safehole = new Safe::Hole;
548: &init_safespace($target,$safeeval,$safehole,$safeinit);
549: #-------------------- Redefinition of the target in the case of compound target
550:
551: ($target, my @tenta) = split('&&',$target);
552:
553: my @stack = ();
554: my @parstack = ();
555: &initdepth;
556:
557: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
558: $safeeval,\%style_for_target);
559: if ($ENV{'request.uri'}) {
560: &writeallows($ENV{'request.uri'});
561: }
562: if ($Apache::lonxml::counter_changed) { &store_counter() }
563: return $finaloutput;
564: }
565:
566: sub htmlclean {
567: my ($raw,$full)=@_;
568:
569: my $tree = HTML::TreeBuilder->new;
570: $tree->ignore_unknown(0);
571:
572: $tree->parse($raw);
573:
574: my $output= $tree->as_HTML(undef,' ');
575:
576: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
577: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
578: unless ($full) {
579: $output=~s/\<[\/]*(body|head|html)\>//gis;
580: }
581:
582: $tree = $tree->delete;
583:
584: return $output;
585: }
586:
587: sub latex_special_symbols {
588: my ($current_token,$stack,$parstack)=@_;
589: $current_token=~s/\\/\\char92 /g;
590: $current_token=~s/\^/\\char94 /g;
591: $current_token=~s/\~/\\char126 /g;
592: $current_token=~s/(&[^a-z\#])/\\$1/g;
593: $current_token=~s/([^&])\#/$1\\#/g;
594: $current_token=~s/(\$|_|{|})/\\$1/g;
595: $current_token=~s/\\char92 /\\texttt{\\char92}/g;
596: $current_token=~s/>/\$>\$/g; #more
597: $current_token=~s/</\$<\$/g; #less
598: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
599: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
600: return $current_token;
601: }
602:
603: sub inner_xmlparse {
604: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
605: my $finaloutput = '';
606: my $result;
607: my $token;
608: while ( $#$pars > -1 ) {
609: while ($token = $$pars['-1']->get_token) {
610: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
611: if ($metamode<1) {
612: my $text=$token->[1];
613: if ($token->[0] eq 'C' && $target eq 'tex') {
614: $text = '%'.$text;
615: $text =~ s/[\n\r]//g;
616: }
617: $result.=$text;
618: }
619: } elsif ($token->[0] eq 'PI') {
620: if ($metamode<1) {
621: $result=$token->[2];
622: }
623: } elsif ($token->[0] eq 'S') {
624: # add tag to stack
625: push (@$stack,$token->[1]);
626: # add parameters list to another stack
627: push (@$parstack,&parstring($token));
628: &increasedepth($token);
629: if (exists $$style_for_target{$token->[1]}) {
630: if ($Apache::lonxml::redirection) {
631: $Apache::lonxml::outputstack['-1'] .=
632: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
633: $style_for_target,@$parstack);
634: } else {
635: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
636: $safeeval,$style_for_target,@$parstack);
637: }
638: } else {
639: $result = &callsub("start_$token->[1]", $target, $token, $stack,
640: $parstack, $pars, $safeeval, $style_for_target);
641: }
642: } elsif ($token->[0] eq 'E') {
643: #clear out any tags that didn't end
644: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
645: my $lasttag=$$stack[-1];
646: if ($token->[1] =~ /^$lasttag$/i) {
647: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
648: last;
649: } else {
650: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
651: &end_tag($stack,$parstack,$token);
652: }
653: }
654:
655: if (exists($$style_for_target{'/'."$token->[1]"})) {
656: if ($Apache::lonxml::redirection) {
657: $Apache::lonxml::outputstack['-1'] .=
658: &recurse($$style_for_target{'/'."$token->[1]"},
659: $target,$safeeval,$style_for_target,@$parstack);
660: } else {
661: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
662: $target,$safeeval,$style_for_target,
663: @$parstack);
664: }
665: } else {
666: $result = &callsub("end_$token->[1]", $target, $token, $stack,
667: $parstack, $pars,$safeeval, $style_for_target);
668: }
669: } else {
670: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
671: }
672: #evaluate variable refs in result
673: if ($result ne "") {
674: if ( $#$parstack > -1 ) {
675: $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
676: } else {
677: $result= &Apache::run::evaluate($result,$safeeval,'');
678: }
679: }
680: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
681: if ($target eq 'tex') {
682: $result=&latex_special_symbols($result,$stack,$parstack);
683: }
684: }
685:
686: # Encode any high ASCII characters
687: if (!$Apache::lonxml::prevent_entity_encode) {
688: $result=&HTML::Entities::encode($result,"\200-\377");
689: }
690: if ($Apache::lonxml::redirection) {
691: $Apache::lonxml::outputstack['-1'] .= $result;
692: } else {
693: $finaloutput.=$result;
694: }
695: $result = '';
696:
697: if ($token->[0] eq 'E') {
698: &end_tag($stack,$parstack,$token);
699: }
700: }
701: pop @$pars;
702: pop @Apache::lonxml::pwd;
703: }
704:
705: # if ($target eq 'meta') {
706: # $finaloutput.=&endredirection;
707: # }
708:
709:
710: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
711: $finaloutput=&afterburn($finaloutput);
712: }
713: return $finaloutput;
714: }
715:
716: sub recurse {
717: my @innerstack = ();
718: my @innerparstack = ();
719: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
720: my @pat = ();
721: &newparser(\@pat,\$newarg);
722: my $tokenpat;
723: my $partstring = '';
724: my $output='';
725: my $decls='';
726: &Apache::lonxml::debug("Recursing");
727: while ( $#pat > -1 ) {
728: while ($tokenpat = $pat[$#pat]->get_token) {
729: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
730: if ($metamode<1) { $partstring=$tokenpat->[1]; }
731: } elsif ($tokenpat->[0] eq 'PI') {
732: if ($metamode<1) { $partstring=$tokenpat->[2]; }
733: } elsif ($tokenpat->[0] eq 'S') {
734: push (@innerstack,$tokenpat->[1]);
735: push (@innerparstack,&parstring($tokenpat));
736: &increasedepth($tokenpat);
737: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
738: \@innerstack, \@innerparstack, \@pat,
739: $safeeval, $style_for_target);
740: } elsif ($tokenpat->[0] eq 'E') {
741: #clear out any tags that didn't end
742: while ($tokenpat->[1] ne $innerstack[$#innerstack]
743: && ($#innerstack > -1)) {
744: my $lasttag=$innerstack[-1];
745: if ($tokenpat->[1] =~ /^$lasttag$/i) {
746: &Apache::lonxml::warning('Using tag </'.$tokenpat->[1].'> as end tag to <'.$innerstack[-1].'>');
747: last;
748: } else {
749: &Apache::lonxml::warning('Found tag </'.$tokenpat->[1].'> when looking for </'.$innerstack[-1].'> in file');
750: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
751: }
752: }
753: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
754: \@innerstack, \@innerparstack, \@pat,
755: $safeeval, $style_for_target);
756: } else {
757: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
758: }
759: #pass both the variable to the style tag, and the tag we
760: #are processing inside the <definedtag>
761: if ( $partstring ne "" ) {
762: if ( $#parstack > -1 ) {
763: if ( $#innerparstack > -1 ) {
764: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
765: } else {
766: $decls= $parstack[$#parstack];
767: }
768: } else {
769: if ( $#innerparstack > -1 ) {
770: $decls=$innerparstack[$#innerparstack];
771: } else {
772: $decls='';
773: }
774: }
775: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
776: $partstring = '';
777: }
778: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
779: &decreasedepth($tokenpat);}
780: }
781: pop @pat;
782: pop @Apache::lonxml::pwd;
783: }
784: &Apache::lonxml::debug("Exiting Recursing");
785: return $output;
786: }
787:
788: sub callsub {
789: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
790: my $currentstring='';
791: my $nodefault;
792: {
793: my $sub1;
794: no strict 'refs';
795: my $tag=$token->[1];
796: my $space=$Apache::lonxml::alltags{$tag}[-1];
797: if (!$space) {
798: $tag=~tr/A-Z/a-z/;
799: $sub=~tr/A-Z/a-z/;
800: $space=$Apache::lonxml::alltags{$tag}[-1]
801: }
802:
803: my $deleted=0;
804: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
805: if (($token->[0] eq 'S') && ($target eq 'modified')) {
806: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
807: $parstack,$parser,$safeeval,
808: $style);
809: }
810: if (!$deleted) {
811: if ($space) {
812: &Apache::lonxml::debug("Calling sub $sub in $space $metamode");
813: $sub1="$space\:\:$sub";
814: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
815: $parstack,$parser,$safeeval,
816: $style);
817: } else {
818: &Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
819: if ($metamode <1) {
820: if (defined($token->[4]) && ($metamode < 1)) {
821: $currentstring = $token->[4];
822: } else {
823: $currentstring = $token->[2];
824: }
825: }
826: }
827: # &Apache::lonxml::debug("nodefalt:$nodefault:");
828: if ($currentstring eq '' && $nodefault eq '') {
829: if ($target eq 'edit') {
830: &Apache::lonxml::debug("doing default edit for $token->[1]");
831: if ($token->[0] eq 'S') {
832: $currentstring = &Apache::edit::tag_start($target,$token);
833: } elsif ($token->[0] eq 'E') {
834: $currentstring = &Apache::edit::tag_end($target,$token);
835: }
836: } elsif ($target eq 'modified') {
837: if ($token->[0] eq 'S') {
838: $currentstring = $token->[4];
839: $currentstring.=&Apache::edit::handle_insert();
840: } else {
841: $currentstring = $token->[2];
842: }
843: }
844: }
845: }
846: use strict 'refs';
847: }
848: return $currentstring;
849: }
850:
851: sub setup_globals {
852: my ($request,$target)=@_;
853: $Apache::lonxml::request=$request;
854: $Apache::lonxml::registered = 0;
855: $errorcount=0;
856: $warningcount=0;
857: &init_counter();
858: @Apache::lonxml::pwd=();
859: @Apache::lonxml::extlinks=();
860: if ($target eq 'meta') {
861: $Apache::lonxml::redirection = 0;
862: $Apache::lonxml::metamode = 1;
863: $Apache::lonxml::evaluate = 1;
864: $Apache::lonxml::import = 0;
865: } elsif ($target eq 'answer') {
866: $Apache::lonxml::redirection = 0;
867: $Apache::lonxml::metamode = 1;
868: $Apache::lonxml::evaluate = 1;
869: $Apache::lonxml::import = 1;
870: } elsif ($target eq 'grade') {
871: &startredirection;
872: $Apache::lonxml::metamode = 0;
873: $Apache::lonxml::evaluate = 1;
874: $Apache::lonxml::import = 1;
875: } elsif ($target eq 'modified') {
876: $Apache::lonxml::redirection = 0;
877: $Apache::lonxml::metamode = 0;
878: $Apache::lonxml::evaluate = 0;
879: $Apache::lonxml::import = 0;
880: } elsif ($target eq 'edit') {
881: $Apache::lonxml::redirection = 0;
882: $Apache::lonxml::metamode = 0;
883: $Apache::lonxml::evaluate = 0;
884: $Apache::lonxml::import = 0;
885: } elsif ($target eq 'analyze') {
886: $Apache::lonxml::redirection = 0;
887: $Apache::lonxml::metamode = 0;
888: $Apache::lonxml::evaluate = 1;
889: $Apache::lonxml::import = 1;
890: } else {
891: $Apache::lonxml::redirection = 0;
892: $Apache::lonxml::metamode = 0;
893: $Apache::lonxml::evaluate = 1;
894: $Apache::lonxml::import = 1;
895: }
896: }
897:
898: sub init_safespace {
899: my ($target,$safeeval,$safehole,$safeinit) = @_;
900: $safeeval->permit("entereval");
901: $safeeval->permit(":base_math");
902: $safeeval->permit("sort");
903: $safeeval->deny(":base_io");
904: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
905: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
906:
907: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
908: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
909: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
910: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
911: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
912: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
913: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
914: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
915: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
916: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
917: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
918: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
919: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
920: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
921: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
922: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
923: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
924: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
925: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
926: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
927: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
928: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
929: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
930: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
931: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
932: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
933: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
934: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
935: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
936: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
937: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
938: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
939: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
940: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
941: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
942: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
943: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
944: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
945: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
946: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
947:
948: #need to inspect this class of ops
949: # $safeeval->deny(":base_orig");
950: $safeinit .= ';$external::target="'.$target.'";';
951: my $rndseed;
952: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
953: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
954: $safeinit .= ';$external::randomseed='.$rndseed.';';
955: &Apache::run::run($safeinit,$safeeval);
956: }
957:
958: sub startredirection {
959: $Apache::lonxml::redirection++;
960: push (@Apache::lonxml::outputstack, '');
961: }
962:
963: sub endredirection {
964: if (!$Apache::lonxml::redirection) {
965: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
966: return '';
967: }
968: $Apache::lonxml::redirection--;
969: pop @Apache::lonxml::outputstack;
970: }
971:
972: sub end_tag {
973: my ($tagstack,$parstack,$token)=@_;
974: pop(@$tagstack);
975: pop(@$parstack);
976: &decreasedepth($token);
977: }
978:
979: sub initdepth {
980: @Apache::lonxml::depthcounter=();
981: $Apache::lonxml::depth=-1;
982: $Apache::lonxml::olddepth=-1;
983: }
984:
985: sub increasedepth {
986: my ($token) = @_;
987: $Apache::lonxml::depth++;
988: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
989: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
990: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
991: }
992: my $curdepth=join('_',@Apache::lonxml::depthcounter);
993: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
994: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
995: }
996:
997: sub decreasedepth {
998: my ($token) = @_;
999: $Apache::lonxml::depth--;
1000: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
1001: $#Apache::lonxml::depthcounter--;
1002: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
1003: }
1004: if ( $Apache::lonxml::depth < -1) {
1005: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
1006: $Apache::lonxml::depth='-1';
1007: }
1008: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1009: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1010: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1011: }
1012:
1013: sub get_all_text_unbalanced {
1014: #there is a copy of this in lonpublisher.pm
1015: my($tag,$pars)= @_;
1016: my $token;
1017: my $result='';
1018: $tag='<'.$tag.'>';
1019: while ($token = $$pars[-1]->get_token) {
1020: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1021: $result.=$token->[1];
1022: } elsif ($token->[0] eq 'PI') {
1023: $result.=$token->[2];
1024: } elsif ($token->[0] eq 'S') {
1025: $result.=$token->[4];
1026: } elsif ($token->[0] eq 'E') {
1027: $result.=$token->[2];
1028: }
1029: if ($result =~ /(.*)$tag(.*)/) {
1030: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1031: &Apache::lonxml::debug('Result is :'.$1);
1032: $result=$1;
1033: my $redo=$tag.$2;
1034: &Apache::lonxml::newparser($pars,\$redo);
1035: last;
1036: }
1037: }
1038: return $result
1039: }
1040:
1041: sub increment_counter {
1042: $Apache::lonxml::counter++;
1043: $Apache::lonxml::counter_changed=1;
1044: }
1045:
1046: sub init_counter {
1047: if (defined($ENV{'form.counter'})) {
1048: $Apache::lonxml::counter=$ENV{'form.counter'};
1049: } elsif (not defined($Apache::lonxml::counter)) {
1050: $Apache::lonxml::counter=1;
1051: &store_counter();
1052: }
1053: $Apache::lonxml::counter_changed=0;
1054: }
1055:
1056: sub store_counter {
1057: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1058: return '';
1059: }
1060:
1061: sub get_all_text {
1062: my($tag,$pars)= @_;
1063: my $depth=0;
1064: my $token;
1065: my $result='';
1066: if ( $tag =~ m:^/: ) {
1067: my $tag=substr($tag,1);
1068: # &Apache::lonxml::debug("have:$tag:");
1069: while (($depth >=0) && ($token = $pars->get_token)) {
1070: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
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: if ($token->[1] =~ /^$tag$/i) { $depth++; }
1077: $result.=$token->[4];
1078: } elsif ($token->[0] eq 'E') {
1079: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
1080: #skip sending back the last end tag
1081: if ($depth > -1) { $result.=$token->[2]; } else {
1082: $pars->unget_token($token);
1083: }
1084: }
1085: }
1086: } else {
1087: while ($token = $pars->get_token) {
1088: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1089: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1090: $result.=$token->[1];
1091: } elsif ($token->[0] eq 'PI') {
1092: $result.=$token->[2];
1093: } elsif ($token->[0] eq 'S') {
1094: if ( $token->[1] =~ /^$tag$/i) {
1095: $pars->unget_token($token); last;
1096: } else {
1097: $result.=$token->[4];
1098: }
1099: } elsif ($token->[0] eq 'E') {
1100: $result.=$token->[2];
1101: }
1102: }
1103: }
1104: # &Apache::lonxml::debug("Exit:$result:");
1105: return $result
1106: }
1107:
1108: sub newparser {
1109: my ($parser,$contentref,$dir) = @_;
1110: push (@$parser,HTML::LCParser->new($contentref));
1111: $$parser['-1']->xml_mode('1');
1112: if ( $dir eq '' ) {
1113: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1114: } else {
1115: push (@Apache::lonxml::pwd, $dir);
1116: }
1117: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
1118: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
1119: }
1120:
1121: sub parstring {
1122: my ($token) = @_;
1123: my $temp='';
1124: foreach (@{$token->[3]}) {
1125: unless ($_=~/\W/) {
1126: my $val=$token->[2]->{$_};
1127: $val =~ s/([\%\@\\\"])/\\$1/g;
1128: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1129: $temp .= "my \$$_=\"$val\";"
1130: }
1131: }
1132: return $temp;
1133: }
1134:
1135: sub writeallows {
1136: unless ($#extlinks>=0) { return; }
1137: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1138: if ($ENV{'httpref.'.$thisurl}) {
1139: $thisurl=$ENV{'httpref.'.$thisurl};
1140: }
1141: my $thisdir=$thisurl;
1142: $thisdir=~s/\/[^\/]+$//;
1143: my %httpref=();
1144: foreach (@extlinks) {
1145: $httpref{'httpref.'.
1146: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1147: }
1148: @extlinks=();
1149: &Apache::lonnet::appenv(%httpref);
1150: }
1151:
1152: #
1153: # Afterburner handles anchors, highlights and links
1154: #
1155: sub afterburn {
1156: my $result=shift;
1157: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1158: ['highlight','anchor','link']);
1159: if ($ENV{'form.highlight'}) {
1160: foreach (split(/\,/,$ENV{'form.highlight'})) {
1161: my $anchorname=$_;
1162: my $matchthis=$anchorname;
1163: $matchthis=~s/\_+/\\s\+/g;
1164: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1165: }
1166: }
1167: if ($ENV{'form.link'}) {
1168: foreach (split(/\,/,$ENV{'form.link'})) {
1169: my ($anchorname,$linkurl)=split(/\>/,$_);
1170: my $matchthis=$anchorname;
1171: $matchthis=~s/\_+/\\s\+/g;
1172: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1173: }
1174: }
1175: if ($ENV{'form.anchor'}) {
1176: my $anchorname=$ENV{'form.anchor'};
1177: my $matchthis=$anchorname;
1178: $matchthis=~s/\_+/\\s\+/g;
1179: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1180: $result.=(<<"ENDSCRIPT");
1181: <script>
1182: document.location.hash='$anchorname';
1183: </script>
1184: ENDSCRIPT
1185: }
1186: return $result;
1187: }
1188:
1189: sub storefile {
1190: my ($file,$contents)=@_;
1191: if (my $fh=Apache::File->new('>'.$file)) {
1192: print $fh $contents;
1193: $fh->close();
1194: } else {
1195: &warning("Unable to save file $file");
1196: }
1197: }
1198:
1199: sub createnewhtml {
1200: my $filecontents=(<<SIMPLECONTENT);
1201: <html>
1202: <head>
1203: <title>
1204: Title of Document Goes Here
1205: </title>
1206: </head>
1207: <body bgcolor="#FFFFFF">
1208:
1209: Body of Document Goes Here
1210:
1211: </body>
1212: </html>
1213: SIMPLECONTENT
1214: return $filecontents;
1215: }
1216:
1217:
1218: sub inserteditinfo {
1219: my ($result,$filecontents)=@_;
1220: $filecontents = &HTML::Entities::encode($filecontents);
1221: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1222: my $buttons=(<<BUTTONS);
1223: <input type="submit" name="attemptclean"
1224: value="Save and then attempt to clean HTML" />
1225: <input type="submit" name="savethisfile" value="Save this" />
1226: <input type="submit" name="viewmode" value="View" />
1227: BUTTONS
1228: my $editfooter=(<<ENDFOOTER);
1229: <hr />
1230: <a name="editsection" />
1231: <form method="post">
1232: <input type="hidden" name="editmode" value="Edit" />
1233: $buttons<br />
1234: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1235: <br />$buttons
1236: <br />
1237: </form>
1238: ENDFOOTER
1239: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1240: $result=~s/(\<\/body\>)/$editfooter/is;
1241: return $result;
1242: }
1243:
1244: sub get_target {
1245: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1246: if ( $ENV{'request.state'} eq 'published') {
1247: if ( defined($ENV{'form.grade_target'})
1248: && ($viewgrades == 'F' )) {
1249: return ($ENV{'form.grade_target'});
1250: } elsif (defined($ENV{'form.grade_target'})) {
1251: if (($ENV{'form.grade_target'} eq 'web') ||
1252: ($ENV{'form.grade_target'} eq 'tex') ) {
1253: return $ENV{'form.grade_target'}
1254: } else {
1255: return 'web';
1256: }
1257: } else {
1258: return 'web';
1259: }
1260: } elsif ($ENV{'request.state'} eq 'construct') {
1261: if ( defined($ENV{'form.grade_target'})) {
1262: return ($ENV{'form.grade_target'});
1263: } else {
1264: return 'web';
1265: }
1266: } else {
1267: return 'web';
1268: }
1269: }
1270:
1271: sub handler {
1272: my $request=shift;
1273:
1274: my $target=&get_target();
1275:
1276: $Apache::lonxml::debug=0;
1277:
1278: if ($ENV{'browser.mathml'}) {
1279: $request->content_type('text/xml');
1280: } else {
1281: $request->content_type('text/html');
1282: }
1283: &Apache::loncommon::no_cache($request);
1284: $request->send_http_header;
1285:
1286: return OK if $request->header_only;
1287:
1288:
1289: my $file=&Apache::lonnet::filelocation("",$request->uri);
1290: #
1291: # Edit action? Save file.
1292: #
1293: unless ($ENV{'request.state'} eq 'published') {
1294: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1295: &storefile($file,$ENV{'form.filecont'});
1296: }
1297: }
1298: my %mystyle;
1299: my $result = '';
1300: my $filecontents=&Apache::lonnet::getfile($file);
1301: if ($filecontents == -1) {
1302: $result=(<<ENDNOTFOUND);
1303: <html>
1304: <head>
1305: <title>File not found</title>
1306: </head>
1307: <body bgcolor="#FFFFFF">
1308: <b>File not found: $file</b>
1309: </body>
1310: </html>
1311: ENDNOTFOUND
1312: $filecontents='';
1313: if ($ENV{'request.state'} ne 'published') {
1314: $filecontents=&createnewhtml();
1315: $ENV{'form.editmode'}='Edit'; #force edit mode
1316: }
1317: } else {
1318: unless ($ENV{'request.state'} eq 'published') {
1319: if ($ENV{'form.attemptclean'}) {
1320: $filecontents=&htmlclean($filecontents,1);
1321: }
1322: }
1323: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1324: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1325: '',%mystyle);
1326: }
1327: }
1328:
1329: #
1330: # Edit action? Insert editing commands
1331: #
1332: unless ($ENV{'request.state'} eq 'published') {
1333: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1334: my $displayfile=$request->uri;
1335: $displayfile=~s/^\/[^\/]*//;
1336: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1337: '</h3></body></html>';
1338: $result=&inserteditinfo($result,$filecontents);
1339: }
1340: }
1341:
1342: writeallows($request->uri);
1343:
1344: $request->print($result);
1345:
1346: return OK;
1347: }
1348:
1349: sub debug {
1350: if ($Apache::lonxml::debug eq 1) {
1351: $|=1;
1352: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1353: }
1354: }
1355:
1356: sub error {
1357: $errorcount++;
1358: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1359: # If printing in construction space, put the error inside <pre></pre>
1360: print "<b>ERROR:</b>".join("\n",@_)."\n";
1361: } else {
1362: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1363: #notify author
1364: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1365: #notify course
1366: if ( $ENV{'request.course.id'} ) {
1367: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1368: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1369: foreach my $user (split /\,/, $users) {
1370: ($user,my $domain) = split /:/, $user;
1371: &Apache::lonmsg::user_normal_msg($user,$domain,
1372: "Error [$declutter]",join('<br />',@_));
1373: }
1374: }
1375:
1376: #FIXME probably shouldn't have me get everything forever.
1377: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1378: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1379: }
1380: }
1381:
1382: sub warning {
1383: $warningcount++;
1384: if ($ENV{'request.state'} eq 'construct') {
1385: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1386: }
1387: }
1388:
1389: sub get_param {
1390: my ($param,$parstack,$safeeval,$context) = @_;
1391: if ( ! $context ) { $context = -1; }
1392: my $args ='';
1393: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1394: if ( ! $args ) { return undef; }
1395: if ( $args =~ /my \$$param=\"/ ) {
1396: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1397: } else {
1398: return undef;
1399: }
1400: }
1401:
1402: sub get_param_var {
1403: my ($param,$parstack,$safeeval,$context) = @_;
1404: if ( ! $context ) { $context = -1; }
1405: my $args ='';
1406: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1407: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1408: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1409: if ($value =~ /^[\$\@\%]/) {
1410: return &Apache::run::run("return $value",$safeeval,1);
1411: } else {
1412: return $value;
1413: }
1414: }
1415:
1416: sub register_insert {
1417: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1418: my $i;
1419: my $tagnum=0;
1420: my @order;
1421: for ($i=0;$i < $#data; $i++) {
1422: my $line = $data[$i];
1423: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1424: if ( $line =~ /TABLE/ ) { last; }
1425: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1426: if ($tag) {
1427: $insertlist{"$tagnum.tag"} = $tag;
1428: $insertlist{"$tagnum.description"} = $descrip;
1429: $insertlist{"$tagnum.color"} = $color;
1430: $insertlist{"$tagnum.function"} = $function;
1431: if (!defined($show)) { $show='yes'; }
1432: $insertlist{"$tagnum.show"}= $show;
1433: $insertlist{"$tag.num"}=$tagnum;
1434: $tagnum++;
1435: }
1436: }
1437: $i++; #skipping TABLE line
1438: $tagnum = 0;
1439: for (;$i < $#data;$i++) {
1440: my $line = $data[$i];
1441: my ($mnemonic,@which) = split(/ +/,$line);
1442: my $tag = $insertlist{"$tagnum.tag"};
1443: for (my $j=0;$j <=$#which;$j++) {
1444: if ( $which[$j] eq 'Y' ) {
1445: if ($insertlist{"$j.show"} ne 'no') {
1446: push(@{ $insertlist{"$tag.which"} },$j);
1447: }
1448: }
1449: }
1450: $tagnum++;
1451: }
1452: }
1453:
1454: sub description {
1455: my ($token)=@_;
1456: my $tagnum;
1457: my $tag=$token->[1];
1458: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1459: my $testtag=$namespace.'::'.$tag;
1460: $tagnum=$insertlist{"$testtag.num"};
1461: if (defined($tagnum)) { last; }
1462: }
1463: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1464: return $insertlist{$tagnum.'.description'};
1465: }
1466:
1467: # ----------------------------------------------------------------- whichuser
1468: # returns a list of $symb, $courseid, $domain, $name that is correct for
1469: # calls to lonnet functions for this setup.
1470: # - looks for form.grade_ parameters
1471: sub whichuser {
1472: my ($symb,$courseid,$domain,$name);
1473: if (defined($ENV{'form.grade_symb'})) {
1474: my $tmp_courseid=$ENV{'form.grade_courseid'};
1475: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1476: if ($allowed) {
1477: $symb=$ENV{'form.grade_symb'};
1478: $courseid=$ENV{'form.grade_courseid'};
1479: $domain=$ENV{'form.grade_domain'};
1480: $name=$ENV{'form.grade_username'};
1481: }
1482: } else {
1483: $symb=&Apache::lonnet::symbread();
1484: $courseid=$ENV{'request.course.id'};
1485: $domain=$ENV{'user.domain'};
1486: $name=$ENV{'user.name'};
1487: }
1488: return ($symb,$courseid,$domain,$name);
1489: }
1490:
1491: 1;
1492: __END__
1493:
1494:
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