1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.184 2002/07/24 20:25:23 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 $result = '';
334: if ($target eq 'edit') {
335: $result .="<script>\n menu.currentURL=null;\n".
336: &Apache::loncommon::browser_and_searcher_javascript().
337: "\n</script>\n";
338: }
339: if ((($ENV{'request.publicaccess'}) ||
340: (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
341: (!$forcereg)) {
342: return $result.
343: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
344: }
345: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
346: $Apache::lonxml::registered=1;
347: my $nothing='';
348: if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; }
349: my $timesync='menu.syncclock(1000*'.time.');';
350: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
351: my $hwkadd='';
352: if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
353: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
354: $hwkadd.=(<<ENDSUBM);
355: menu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")');
356: ENDSUBM
357: }
358: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
359: $hwkadd.=(<<ENDGRDS);
360: menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")');
361: ENDGRDS
362: }
363: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
364: $hwkadd.=(<<ENDPARM);
365: menu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")');
366: ENDPARM
367: }
368: }
369: $result = (<<ENDREGTHIS);
370:
371: <script language="JavaScript">
372: // BEGIN LON-CAPA Internal
373:
374: function LONCAPAreg() {
375: menu=window.open("$nothing","LONCAPAmenu","",false);
376: menu.clearTimeout(menu.menucltim);
377: $timesync
378: menu.currentURL=window.location.pathname;
379: menu.reloadURL=window.location.pathname;
380: menu.currentStale=0;
381: menu.clearbut(3,1);
382: menu.switchbutton
383: (6,3,'catalog.gif','catalog','info','catalog_info()');
384: menu.switchbutton
385: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
386: menu.switchbutton
387: (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)');
388: menu.switchbutton
389: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
390: menu.switchbutton
391: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
392: menu.switchbutton
393: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
394: menu.switchbutton
395: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
396: menu.switchbutton
397: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
398: menu.switchbutton
399: (9,3,'anot.gif','anno-','tations','annotate()');
400: $hwkadd
401: }
402:
403: function LONCAPAstale() {
404: menu=window.open("$nothing","LONCAPAmenu","",false);
405: menu.currentStale=1;
406: if (menu.reloadURL!='' && menu.reloadURL!= null) {
407: menu.switchbutton
408: (3,1,'reload.gif','return','location','go(reloadURL)');
409: }
410: menu.clearbut(7,1);
411: menu.clearbut(7,2);
412: menu.clearbut(7,3);
413: menu.menucltim=menu.setTimeout(
414: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
415: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
416: 2000);
417:
418: }
419:
420: // END LON-CAPA Internal
421: </script>
422: ENDREGTHIS
423:
424: } else {
425: $result = (<<ENDDONOTREGTHIS);
426:
427: <script language="JavaScript">
428: // BEGIN LON-CAPA Internal
429:
430: function LONCAPAreg() {
431: menu=window.open("$nothing","LONCAPAmenu","",false);
432: $timesync
433: menu.currentStale=1;
434: menu.clearbut(2,1);
435: menu.clearbut(2,3);
436: menu.clearbut(8,1);
437: menu.clearbut(8,2);
438: menu.clearbut(8,3);
439: if (menu.currentURL) {
440: menu.switchbutton
441: (3,1,'reload.gif','return','location','go(currentURL)');
442: } else {
443: menu.clearbut(3,1);
444: }
445: }
446:
447: function LONCAPAstale() {
448: }
449:
450: // END LON-CAPA Internal
451: </script>
452: ENDDONOTREGTHIS
453: }
454: return $result;
455: }
456:
457: sub loadevents() {
458: return 'LONCAPAreg();';
459: }
460:
461: sub unloadevents() {
462: return 'LONCAPAstale();';
463: }
464:
465: sub printalltags {
466: my $temp;
467: foreach $temp (sort keys %Apache::lonxml::alltags) {
468: &Apache::lonxml::debug("$temp -- ".
469: join(',',@{ $Apache::lonxml::alltags{$temp} }));
470: }
471: }
472:
473: sub xmlparse {
474: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
475:
476: &setup_globals($request,$target);
477: #
478: # do we have a course style file?
479: #
480:
481: if ($ENV{'request.course.id'}) {
482: my $bodytext=
483: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
484: if ($bodytext) {
485: my $location=&Apache::lonnet::filelocation('',$bodytext);
486: my $styletext=&Apache::lonnet::getfile($location);
487: if ($styletext ne '-1') {
488: %style_for_target = (%style_for_target,
489: &Apache::style::styleparser($target,$styletext));
490: }
491: }
492: }
493:
494: #&printalltags();
495: my @pars = ();
496: my $pwd=$ENV{'request.filename'};
497: $pwd =~ s:/[^/]*$::;
498: &newparser(\@pars,\$content_file_string,$pwd);
499:
500: my $safeeval = new Safe;
501: my $safehole = new Safe::Hole;
502: &init_safespace($target,$safeeval,$safehole,$safeinit);
503: #-------------------- Redefinition of the target in the case of compound target
504:
505: ($target, my @tenta) = split('&&',$target);
506:
507: my @stack = ();
508: my @parstack = ();
509: &initdepth;
510:
511: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
512: $safeeval,\%style_for_target);
513: if ($ENV{'request.uri'}) {
514: &writeallows($ENV{'request.uri'});
515: }
516: return $finaloutput;
517: }
518:
519: sub htmlclean {
520: my ($raw,$full)=@_;
521:
522: my $tree = HTML::TreeBuilder->new;
523: $tree->ignore_unknown(0);
524:
525: $tree->parse($raw);
526:
527: my $output= $tree->as_HTML(undef,' ');
528:
529: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
530: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
531: unless ($full) {
532: $output=~s/\<[\/]*(body|head|html)\>//gis;
533: }
534:
535: $tree = $tree->delete;
536:
537: return $output;
538: }
539:
540: sub inner_xmlparse {
541: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
542: my $finaloutput = '';
543: my $result;
544: my $token;
545: while ( $#$pars > -1 ) {
546: while ($token = $$pars['-1']->get_token) {
547: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
548: if ($metamode<1) {
549: if ($target eq 'tex') {
550: my @temp_array = @$stack;
551: if ($temp_array[-1] ne 'm') {
552: if ($temp_array[-1] ne 'tt') {
553: if ($token->[1]=~m/\^/) {$token->[1]=~s/\^/\\verb|\^|/g;}
554: } else {
555: if ($token->[1]=~m/\^/) {$token->[1]=~s/\^/}\\verb|\^|{/g;}
556: }
557: if ($token->[1]=~m/>/) {$token->[1]=~s/>/\$>\$/g;}
558: if ($token->[1]=~m/</) {$token->[1]=~s/</\$<\$/g;}
559: }
560: }
561: $result.=$token->[1];
562: }
563: } elsif ($token->[0] eq 'PI') {
564: if ($metamode<1) {
565: $result=$token->[2];
566: }
567: } elsif ($token->[0] eq 'S') {
568: # add tag to stack
569: push (@$stack,$token->[1]);
570: # add parameters list to another stack
571: push (@$parstack,&parstring($token));
572: &increasedepth($token);
573: if (exists $$style_for_target{$token->[1]}) {
574: if ($Apache::lonxml::redirection) {
575: $Apache::lonxml::outputstack['-1'] .=
576: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
577: $style_for_target,@$parstack);
578: } else {
579: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
580: $safeeval,$style_for_target,@$parstack);
581: }
582: } else {
583: $result = &callsub("start_$token->[1]", $target, $token, $stack,
584: $parstack, $pars, $safeeval, $style_for_target);
585: }
586: } elsif ($token->[0] eq 'E') {
587: #clear out any tags that didn't end
588: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
589: my $lasttag=$$stack[-1];
590: if ($token->[1] =~ /^$lasttag$/i) {
591: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
592: last;
593: } else {
594: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
595: &end_tag($stack,$parstack,$token);
596: }
597: }
598:
599: if (exists($$style_for_target{'/'."$token->[1]"})) {
600: if ($Apache::lonxml::redirection) {
601: $Apache::lonxml::outputstack['-1'] .=
602: &recurse($$style_for_target{'/'."$token->[1]"},
603: $target,$safeeval,$style_for_target,@$parstack);
604: } else {
605: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
606: $target,$safeeval,$style_for_target,
607: @$parstack);
608: }
609: } else {
610: $result = &callsub("end_$token->[1]", $target, $token, $stack,
611: $parstack, $pars,$safeeval, $style_for_target);
612: }
613: } else {
614: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
615: }
616: #evaluate variable refs in result
617: if ($result ne "") {
618: if ( $#$parstack > -1 ) {
619: $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
620: } else {
621: $result= &Apache::run::evaluate($result,$safeeval,'');
622: }
623: }
624: # Encode any high ASCII characters
625: if (!$Apache::lonxml::prevent_entity_encode) {
626: $result=&HTML::Entities::encode($result,"\200-\377");
627: }
628: if ($Apache::lonxml::redirection) {
629: $Apache::lonxml::outputstack['-1'] .= $result;
630: } else {
631: $finaloutput.=$result;
632: }
633: $result = '';
634:
635: if ($token->[0] eq 'E') {
636: &end_tag($stack,$parstack,$token);
637: }
638: }
639: pop @$pars;
640: pop @Apache::lonxml::pwd;
641: }
642:
643: # if ($target eq 'meta') {
644: # $finaloutput.=&endredirection;
645: # }
646:
647:
648: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
649: $finaloutput=&afterburn($finaloutput);
650: }
651: return $finaloutput;
652: }
653:
654: sub recurse {
655: my @innerstack = ();
656: my @innerparstack = ();
657: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
658: my @pat = ();
659: &newparser(\@pat,\$newarg);
660: my $tokenpat;
661: my $partstring = '';
662: my $output='';
663: my $decls='';
664: &Apache::lonxml::debug("Recursing");
665: while ( $#pat > -1 ) {
666: while ($tokenpat = $pat[$#pat]->get_token) {
667: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
668: if ($metamode<1) { $partstring=$tokenpat->[1]; }
669: } elsif ($tokenpat->[0] eq 'PI') {
670: if ($metamode<1) { $partstring=$tokenpat->[2]; }
671: } elsif ($tokenpat->[0] eq 'S') {
672: push (@innerstack,$tokenpat->[1]);
673: push (@innerparstack,&parstring($tokenpat));
674: &increasedepth($tokenpat);
675: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
676: \@innerstack, \@innerparstack, \@pat,
677: $safeeval, $style_for_target);
678: } elsif ($tokenpat->[0] eq 'E') {
679: #clear out any tags that didn't end
680: while ($tokenpat->[1] ne $innerstack[$#innerstack]
681: && ($#innerstack > -1)) {
682: my $lasttag=$innerstack[-1];
683: if ($tokenpat->[1] =~ /^$lasttag$/i) {
684: &Apache::lonxml::warning('Using tag </'.$tokenpat->[1].'> as end tag to <'.$innerstack[-1].'>');
685: last;
686: } else {
687: &Apache::lonxml::warning('Found tag </'.$tokenpat->[1].'> when looking for </'.$innerstack[-1].'> in file');
688: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
689: }
690: }
691: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
692: \@innerstack, \@innerparstack, \@pat,
693: $safeeval, $style_for_target);
694: } else {
695: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
696: }
697: #pass both the variable to the style tag, and the tag we
698: #are processing inside the <definedtag>
699: if ( $partstring ne "" ) {
700: if ( $#parstack > -1 ) {
701: if ( $#innerparstack > -1 ) {
702: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
703: } else {
704: $decls= $parstack[$#parstack];
705: }
706: } else {
707: if ( $#innerparstack > -1 ) {
708: $decls=$innerparstack[$#innerparstack];
709: } else {
710: $decls='';
711: }
712: }
713: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
714: $partstring = '';
715: }
716: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
717: &decreasedepth($tokenpat);}
718: }
719: pop @pat;
720: pop @Apache::lonxml::pwd;
721: }
722: &Apache::lonxml::debug("Exiting Recursing");
723: return $output;
724: }
725:
726: sub callsub {
727: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
728: my $currentstring='';
729: my $nodefault;
730: {
731: my $sub1;
732: no strict 'refs';
733: my $tag=$token->[1];
734: my $space=$Apache::lonxml::alltags{$tag}[-1];
735: if (!$space) {
736: $tag=~tr/A-Z/a-z/;
737: $sub=~tr/A-Z/a-z/;
738: $space=$Apache::lonxml::alltags{$tag}[-1]
739: }
740:
741: my $deleted=0;
742: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
743: if (($token->[0] eq 'S') && ($target eq 'modified')) {
744: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
745: $parstack,$parser,$safeeval,
746: $style);
747: }
748: if (!$deleted) {
749: if ($space) {
750: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
751: $sub1="$space\:\:$sub";
752: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
753: $parstack,$parser,$safeeval,
754: $style);
755: } else {
756: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
757: if ($metamode <1) {
758: if (defined($token->[4]) && ($metamode < 1)) {
759: $currentstring = $token->[4];
760: } else {
761: $currentstring = $token->[2];
762: }
763: }
764: }
765: # &Apache::lonxml::debug("nodefalt:$nodefault:");
766: if ($currentstring eq '' && $nodefault eq '') {
767: if ($target eq 'edit') {
768: &Apache::lonxml::debug("doing default edit for $token->[1]");
769: if ($token->[0] eq 'S') {
770: $currentstring = &Apache::edit::tag_start($target,$token);
771: } elsif ($token->[0] eq 'E') {
772: $currentstring = &Apache::edit::tag_end($target,$token);
773: }
774: } elsif ($target eq 'modified') {
775: if ($token->[0] eq 'S') {
776: $currentstring = $token->[4];
777: $currentstring.=&Apache::edit::handle_insert();
778: } else {
779: $currentstring = $token->[2];
780: }
781: }
782: }
783: }
784: use strict 'refs';
785: }
786: return $currentstring;
787: }
788:
789: sub setup_globals {
790: my ($request,$target)=@_;
791: $Apache::lonxml::request=$request;
792: $Apache::lonxml::registered = 0;
793: @Apache::lonxml::pwd=();
794: @Apache::lonxml::extlinks=();
795: if ($target eq 'meta') {
796: $Apache::lonxml::redirection = 0;
797: $Apache::lonxml::metamode = 1;
798: $Apache::lonxml::evaluate = 1;
799: $Apache::lonxml::import = 0;
800: } elsif ($target eq 'answer') {
801: $Apache::lonxml::redirection = 0;
802: $Apache::lonxml::metamode = 1;
803: $Apache::lonxml::evaluate = 1;
804: $Apache::lonxml::import = 1;
805: } elsif ($target eq 'grade') {
806: &startredirection;
807: $Apache::lonxml::metamode = 0;
808: $Apache::lonxml::evaluate = 1;
809: $Apache::lonxml::import = 1;
810: } elsif ($target eq 'modified') {
811: $Apache::lonxml::redirection = 0;
812: $Apache::lonxml::metamode = 0;
813: $Apache::lonxml::evaluate = 0;
814: $Apache::lonxml::import = 0;
815: } elsif ($target eq 'edit') {
816: $Apache::lonxml::redirection = 0;
817: $Apache::lonxml::metamode = 0;
818: $Apache::lonxml::evaluate = 0;
819: $Apache::lonxml::import = 0;
820: } elsif ($target eq 'analyze') {
821: $Apache::lonxml::redirection = 0;
822: $Apache::lonxml::metamode = 0;
823: $Apache::lonxml::evaluate = 1;
824: $Apache::lonxml::import = 1;
825: } else {
826: $Apache::lonxml::redirection = 0;
827: $Apache::lonxml::metamode = 0;
828: $Apache::lonxml::evaluate = 1;
829: $Apache::lonxml::import = 1;
830: }
831: }
832:
833: sub init_safespace {
834: my ($target,$safeeval,$safehole,$safeinit) = @_;
835: $safeeval->permit("entereval");
836: $safeeval->permit(":base_math");
837: $safeeval->permit("sort");
838: $safeeval->deny(":base_io");
839: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
840: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
841:
842: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
843: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
844: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
845: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
846: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
847: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
848: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
849: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
850: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
851: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
852: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
853: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
854: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
855: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
856: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
857: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
858: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
859: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
860: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
861: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
862: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
863: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
864: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
865: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
866: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
867: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
868: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
869: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
870: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
871: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
872: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
873: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
874: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
875: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
876: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
877: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
878: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
879: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
880: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
881: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
882:
883: #need to inspect this class of ops
884: # $safeeval->deny(":base_orig");
885: $safeinit .= ';$external::target="'.$target.'";';
886: my $rndseed;
887: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
888: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
889: $safeinit .= ';$external::randomseed='.$rndseed.';';
890: &Apache::run::run($safeinit,$safeeval);
891: }
892:
893: sub startredirection {
894: $Apache::lonxml::redirection++;
895: push (@Apache::lonxml::outputstack, '');
896: }
897:
898: sub endredirection {
899: if (!$Apache::lonxml::redirection) {
900: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
901: return '';
902: }
903: $Apache::lonxml::redirection--;
904: pop @Apache::lonxml::outputstack;
905: }
906:
907: sub end_tag {
908: my ($tagstack,$parstack,$token)=@_;
909: pop(@$tagstack);
910: pop(@$parstack);
911: &decreasedepth($token);
912: }
913:
914: sub initdepth {
915: @Apache::lonxml::depthcounter=();
916: $Apache::lonxml::depth=-1;
917: $Apache::lonxml::olddepth=-1;
918: }
919:
920: sub increasedepth {
921: my ($token) = @_;
922: $Apache::lonxml::depth++;
923: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
924: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
925: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
926: }
927: my $curdepth=join('_',@Apache::lonxml::depthcounter);
928: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
929: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
930: }
931:
932: sub decreasedepth {
933: my ($token) = @_;
934: $Apache::lonxml::depth--;
935: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
936: $#Apache::lonxml::depthcounter--;
937: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
938: }
939: if ( $Apache::lonxml::depth < -1) {
940: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
941: $Apache::lonxml::depth='-1';
942: }
943: my $curdepth=join('_',@Apache::lonxml::depthcounter);
944: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
945: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
946: }
947:
948: sub get_all_text_unbalanced {
949: my($tag,$pars)= @_;
950: my $token;
951: my $result='';
952: $tag='<'.$tag.'>';
953: while ($token = $$pars[-1]->get_token) {
954: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
955: $result.=$token->[1];
956: } elsif ($token->[0] eq 'PI') {
957: $result.=$token->[2];
958: } elsif ($token->[0] eq 'S') {
959: $result.=$token->[4];
960: } elsif ($token->[0] eq 'E') {
961: $result.=$token->[2];
962: }
963: if ($result =~ /(.*)$tag(.*)/) {
964: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
965: &Apache::lonxml::debug('Result is :'.$1);
966: $result=$1;
967: my $redo=$tag.$2;
968: &Apache::lonxml::newparser($pars,\$redo);
969: last;
970: }
971: }
972: return $result
973: }
974:
975: sub get_all_text {
976: my($tag,$pars)= @_;
977: my $depth=0;
978: my $token;
979: my $result='';
980: if ( $tag =~ m:^/: ) {
981: my $tag=substr($tag,1);
982: # &Apache::lonxml::debug("have:$tag:");
983: while (($depth >=0) && ($token = $pars->get_token)) {
984: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
985: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
986: $result.=$token->[1];
987: } elsif ($token->[0] eq 'PI') {
988: $result.=$token->[2];
989: } elsif ($token->[0] eq 'S') {
990: if ($token->[1] =~ /^$tag$/i) { $depth++; }
991: $result.=$token->[4];
992: } elsif ($token->[0] eq 'E') {
993: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
994: #skip sending back the last end tag
995: if ($depth > -1) { $result.=$token->[2]; } else {
996: $pars->unget_token($token);
997: }
998: }
999: }
1000: } else {
1001: while ($token = $pars->get_token) {
1002: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1003: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1004: $result.=$token->[1];
1005: } elsif ($token->[0] eq 'PI') {
1006: $result.=$token->[2];
1007: } elsif ($token->[0] eq 'S') {
1008: if ( $token->[1] =~ /^$tag$/i) {
1009: $pars->unget_token($token); last;
1010: } else {
1011: $result.=$token->[4];
1012: }
1013: } elsif ($token->[0] eq 'E') {
1014: $result.=$token->[2];
1015: }
1016: }
1017: }
1018: # &Apache::lonxml::debug("Exit:$result:");
1019: return $result
1020: }
1021:
1022: sub newparser {
1023: my ($parser,$contentref,$dir) = @_;
1024: push (@$parser,HTML::LCParser->new($contentref));
1025: $$parser['-1']->xml_mode('1');
1026: if ( $dir eq '' ) {
1027: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1028: } else {
1029: push (@Apache::lonxml::pwd, $dir);
1030: }
1031: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
1032: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
1033: }
1034:
1035: sub parstring {
1036: my ($token) = @_;
1037: my $temp='';
1038: foreach (@{$token->[3]}) {
1039: unless ($_=~/\W/) {
1040: my $val=$token->[2]->{$_};
1041: $val =~ s/([\%\@\\\"])/\\$1/g;
1042: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1043: $temp .= "my \$$_=\"$val\";"
1044: }
1045: }
1046: return $temp;
1047: }
1048:
1049: sub writeallows {
1050: unless ($#extlinks>=0) { return; }
1051: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1052: if ($ENV{'httpref.'.$thisurl}) {
1053: $thisurl=$ENV{'httpref.'.$thisurl};
1054: }
1055: my $thisdir=$thisurl;
1056: $thisdir=~s/\/[^\/]+$//;
1057: my %httpref=();
1058: foreach (@extlinks) {
1059: $httpref{'httpref.'.
1060: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1061: }
1062: @extlinks=();
1063: &Apache::lonnet::appenv(%httpref);
1064: }
1065:
1066: #
1067: # Afterburner handles anchors, highlights and links
1068: #
1069: sub afterburn {
1070: my $result=shift;
1071: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1072: ['highlight','anchor','link']);
1073: if ($ENV{'form.highlight'}) {
1074: foreach (split(/\,/,$ENV{'form.highlight'})) {
1075: my $anchorname=$_;
1076: my $matchthis=$anchorname;
1077: $matchthis=~s/\_+/\\s\+/g;
1078: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1079: }
1080: }
1081: if ($ENV{'form.link'}) {
1082: foreach (split(/\,/,$ENV{'form.link'})) {
1083: my ($anchorname,$linkurl)=split(/\>/,$_);
1084: my $matchthis=$anchorname;
1085: $matchthis=~s/\_+/\\s\+/g;
1086: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1087: }
1088: }
1089: if ($ENV{'form.anchor'}) {
1090: my $anchorname=$ENV{'form.anchor'};
1091: my $matchthis=$anchorname;
1092: $matchthis=~s/\_+/\\s\+/g;
1093: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1094: $result.=(<<"ENDSCRIPT");
1095: <script>
1096: document.location.hash='$anchorname';
1097: </script>
1098: ENDSCRIPT
1099: }
1100: return $result;
1101: }
1102:
1103: sub storefile {
1104: my ($file,$contents)=@_;
1105: if (my $fh=Apache::File->new('>'.$file)) {
1106: print $fh $contents;
1107: $fh->close();
1108: } else {
1109: &warning("Unable to save file $file");
1110: }
1111: }
1112:
1113: sub createnewhtml {
1114: my $filecontents=(<<SIMPLECONTENT);
1115: <html>
1116: <head>
1117: <title>
1118: Title of Document Goes Here
1119: </title>
1120: </head>
1121: <body bgcolor="#FFFFFF">
1122:
1123: Body of Document Goes Here
1124:
1125: </body>
1126: </html>
1127: SIMPLECONTENT
1128: return $filecontents;
1129: }
1130:
1131:
1132: sub inserteditinfo {
1133: my ($result,$filecontents)=@_;
1134: $filecontents = &HTML::Entities::encode($filecontents);
1135: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1136: my $buttons=(<<BUTTONS);
1137: <input type="submit" name="attemptclean"
1138: value="Save and then attempt to clean HTML" />
1139: <input type="submit" name="savethisfile" value="Save this" />
1140: <input type="submit" name="viewmode" value="View" />
1141: BUTTONS
1142: my $editfooter=(<<ENDFOOTER);
1143: <hr />
1144: <a name="editsection" />
1145: <form method="post">
1146: <input type="hidden" name="editmode" value="Edit" />
1147: $buttons<br />
1148: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1149: <br />$buttons
1150: <br />
1151: </form>
1152: ENDFOOTER
1153: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1154: $result=~s/(\<\/body\>)/$editfooter/is;
1155: return $result;
1156: }
1157:
1158: sub get_target {
1159: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1160: if ( $ENV{'request.state'} eq 'published') {
1161: if ( defined($ENV{'form.grade_target'})
1162: && ($viewgrades == 'F' )) {
1163: return ($ENV{'form.grade_target'});
1164: } elsif (defined($ENV{'form.grade_target'})) {
1165: if (($ENV{'form.grade_target'} eq 'web') ||
1166: ($ENV{'form.grade_target'} eq 'tex') ) {
1167: return $ENV{'form.grade_target'}
1168: } else {
1169: return 'web';
1170: }
1171: } else {
1172: return 'web';
1173: }
1174: } elsif ($ENV{'request.state'} eq 'construct') {
1175: if ( defined($ENV{'form.grade_target'})) {
1176: return ($ENV{'form.grade_target'});
1177: } else {
1178: return 'web';
1179: }
1180: } else {
1181: return 'web';
1182: }
1183: }
1184:
1185: sub handler {
1186: my $request=shift;
1187:
1188: my $target=&get_target();
1189:
1190: $Apache::lonxml::debug=0;
1191:
1192: if ($ENV{'browser.mathml'}) {
1193: $request->content_type('text/xml');
1194: } else {
1195: $request->content_type('text/html');
1196: }
1197: &Apache::loncommon::no_cache($request);
1198: $request->send_http_header;
1199:
1200: return OK if $request->header_only;
1201:
1202:
1203: my $file=&Apache::lonnet::filelocation("",$request->uri);
1204: #
1205: # Edit action? Save file.
1206: #
1207: unless ($ENV{'request.state'} eq 'published') {
1208: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1209: &storefile($file,$ENV{'form.filecont'});
1210: }
1211: }
1212: my %mystyle;
1213: my $result = '';
1214: my $filecontents=&Apache::lonnet::getfile($file);
1215: if ($filecontents == -1) {
1216: $result=(<<ENDNOTFOUND);
1217: <html>
1218: <head>
1219: <title>File not found</title>
1220: </head>
1221: <body bgcolor="#FFFFFF">
1222: <b>File not found: $file</b>
1223: </body>
1224: </html>
1225: ENDNOTFOUND
1226: $filecontents='';
1227: if ($ENV{'request.state'} ne 'published') {
1228: $filecontents=&createnewhtml();
1229: $ENV{'form.editmode'}='Edit'; #force edit mode
1230: }
1231: } else {
1232: unless ($ENV{'request.state'} eq 'published') {
1233: if ($ENV{'form.attemptclean'}) {
1234: $filecontents=&htmlclean($filecontents,1);
1235: }
1236: }
1237: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1238: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1239: '',%mystyle);
1240: }
1241: }
1242:
1243: #
1244: # Edit action? Insert editing commands
1245: #
1246: unless ($ENV{'request.state'} eq 'published') {
1247: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1248: my $displayfile=$request->uri;
1249: $displayfile=~s/^\/[^\/]*//;
1250: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1251: '</h3></body></html>';
1252: $result=&inserteditinfo($result,$filecontents);
1253: }
1254: }
1255:
1256: writeallows($request->uri);
1257:
1258: $request->print($result);
1259:
1260: return OK;
1261: }
1262:
1263: sub debug {
1264: if ($Apache::lonxml::debug eq 1) {
1265: $|=1;
1266: print("DEBUG:".&HTML::Entities::encode($_[0])."<br />\n");
1267: }
1268: }
1269:
1270: sub error {
1271: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1272: # If printing in construction space, put the error inside <pre></pre>
1273: print "<b>ERROR:</b>".join("\n",@_)."\n";
1274: } else {
1275: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1276: #notify author
1277: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1278: #notify course
1279: if ( $ENV{'request.course.id'} ) {
1280: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1281: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1282: foreach my $user (split /\,/, $users) {
1283: ($user,my $domain) = split /:/, $user;
1284: &Apache::lonmsg::user_normal_msg($user,$domain,
1285: "Error [$declutter]",join('<br />',@_));
1286: }
1287: }
1288:
1289: #FIXME probably shouldn't have me get everything forever.
1290: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1291: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1292: }
1293: }
1294:
1295: sub warning {
1296: if ($ENV{'request.state'} eq 'construct') {
1297: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1298: }
1299: }
1300:
1301: sub get_param {
1302: my ($param,$parstack,$safeeval,$context) = @_;
1303: if ( ! $context ) { $context = -1; }
1304: my $args ='';
1305: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1306: if ( ! $args ) { return undef; }
1307: if ( $args =~ /my \$$param=\"/ ) {
1308: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1309: } else {
1310: return undef;
1311: }
1312: }
1313:
1314: sub get_param_var {
1315: my ($param,$parstack,$safeeval,$context) = @_;
1316: if ( ! $context ) { $context = -1; }
1317: my $args ='';
1318: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1319: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1320: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1321: if ($value =~ /^[\$\@\%]/) {
1322: return &Apache::run::run("return $value",$safeeval,1);
1323: } else {
1324: return $value;
1325: }
1326: }
1327:
1328: sub register_insert {
1329: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1330: my $i;
1331: my $tagnum=0;
1332: my @order;
1333: for ($i=0;$i < $#data; $i++) {
1334: my $line = $data[$i];
1335: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1336: if ( $line =~ /TABLE/ ) { last; }
1337: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1338: if ($tag) {
1339: $insertlist{"$tagnum.tag"} = $tag;
1340: $insertlist{"$tagnum.description"} = $descrip;
1341: $insertlist{"$tagnum.color"} = $color;
1342: $insertlist{"$tagnum.function"} = $function;
1343: if (!defined($show)) { $show='yes'; }
1344: $insertlist{"$tagnum.show"}= $show;
1345: $insertlist{"$tag.num"}=$tagnum;
1346: $tagnum++;
1347: }
1348: }
1349: $i++; #skipping TABLE line
1350: $tagnum = 0;
1351: for (;$i < $#data;$i++) {
1352: my $line = $data[$i];
1353: my ($mnemonic,@which) = split(/ +/,$line);
1354: my $tag = $insertlist{"$tagnum.tag"};
1355: for (my $j=0;$j <=$#which;$j++) {
1356: if ( $which[$j] eq 'Y' ) {
1357: if ($insertlist{"$j.show"} ne 'no') {
1358: push(@{ $insertlist{"$tag.which"} },$j);
1359: }
1360: }
1361: }
1362: $tagnum++;
1363: }
1364: }
1365:
1366: sub description {
1367: my ($token)=@_;
1368: my $tagnum;
1369: my $tag=$token->[1];
1370: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1371: my $testtag=$namespace.'::'.$tag;
1372: $tagnum=$insertlist{"$testtag.num"};
1373: if (defined($tagnum)) { last; }
1374: }
1375: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1376: return $insertlist{$tagnum.'.description'};
1377: }
1378:
1379: # ----------------------------------------------------------------- whichuser
1380: # returns a list of $symb, $courseid, $domain, $name that is correct for
1381: # calls to lonnet functions for this setup.
1382: # - looks for form.grade_ parameters
1383: sub whichuser {
1384: my ($symb,$courseid,$domain,$name);
1385: if (defined($ENV{'form.grade_symb'})) {
1386: my $tmp_courseid=$ENV{'form.grade_courseid'};
1387: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1388: if ($allowed) {
1389: $symb=$ENV{'form.grade_symb'};
1390: $courseid=$ENV{'form.grade_courseid'};
1391: $domain=$ENV{'form.grade_domain'};
1392: $name=$ENV{'form.grade_username'};
1393: }
1394: } else {
1395: $symb=&Apache::lonnet::symbread();
1396: $courseid=$ENV{'request.course.id'};
1397: $domain=$ENV{'user.domain'};
1398: $name=$ENV{'user.name'};
1399: }
1400: return ($symb,$courseid,$domain,$name);
1401: }
1402:
1403: 1;
1404: __END__
1405:
1406:
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