1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.211 2002/11/06 22:36:08 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39: # last modified 06/26/00 by Alexander Sakharuk
40: # 11/6 Gerd Kortemeyer
41: # 6/1/1 Gerd Kortemeyer
42: # 2/21,3/13 Guy
43: # 3/29,5/4 Gerd Kortemeyer
44: # 5/10 Scott Harrison
45: # 5/26 Gerd Kortemeyer
46: # 5/27 H. K. Ng
47: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
48: # 6/12,6/13 H. K. Ng
49: # 6/16 Gerd Kortemeyer
50: # 7/27 H. K. Ng
51: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
52: # Guy Albertelli
53: # 9/26 Gerd Kortemeyer
54: # Dec Guy Albertelli
55: # YEAR=2002
56: # 1/1 Gerd Kortemeyer
57: # 1/2 Matthew Hall
58: # 1/3 Gerd Kortemeyer
59: #
60:
61: package Apache::lonxml;
62: use vars
63: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
64: use strict;
65: use HTML::LCParser();
66: use HTML::TreeBuilder();
67: use HTML::Entities();
68: use Safe();
69: use Safe::Hole();
70: use Math::Cephes();
71: use Math::Random();
72: use Opcode();
73:
74: sub register {
75: my ($space,@taglist) = @_;
76: foreach my $temptag (@taglist) {
77: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
78: }
79: }
80:
81: sub deregister {
82: my ($space,@taglist) = @_;
83: foreach my $temptag (@taglist) {
84: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
85: if ($tempspace eq $space) {
86: pop(@{ $Apache::lonxml::alltags{$temptag} });
87: }
88: }
89: #&printalltags();
90: }
91:
92: use Apache::Constants qw(:common);
93: use Apache::lontexconvert();
94: use Apache::style();
95: use Apache::run();
96: use Apache::londefdef();
97: use Apache::scripttag();
98: use Apache::edit();
99: use Apache::lonnet();
100: use Apache::File();
101: use Apache::loncommon();
102: use Apache::lonfeedback();
103: use Apache::lonmsg();
104:
105: #================================================== Main subroutine: xmlparse
106: #debugging control, to turn on debugging modify the correct handler
107: $Apache::lonxml::debug=0;
108:
109: # keeps count of the number of warnings and errors generated in a parse
110: $warningcount=0;
111: $errorcount=0;
112:
113: #path to the directory containing the file currently being processed
114: @pwd=();
115:
116: #these two are used for capturing a subset of the output for later processing,
117: #don't touch them directly use &startredirection and &endredirection
118: @outputstack = ();
119: $redirection = 0;
120:
121: #controls wheter the <import> tag actually does
122: $import = 1;
123: @extlinks=();
124:
125: # meta mode is a bit weird only some output is to be turned off
126: #<output> tag turns metamode off (defined in londefdef.pm)
127: $metamode = 0;
128:
129: # turns on and of run::evaluate actually derefencing var refs
130: $evaluate = 1;
131:
132: # data structure for eidt mode, determines what tags can go into what other tags
133: %insertlist=();
134:
135: # stores the list of active tag namespaces
136: @namespace=();
137:
138: # if 0 all high ASCII characters will be encoded into HTML Entities
139: $prevent_entity_encode=0;
140:
141: # has the dynamic menu been updated to know about this resource
142: $Apache::lonxml::registered=0;
143:
144: # a pointer the the Apache request object
145: $Apache::lonxml::request='';
146:
147: # a problem number counter, and check on hether it is used
148: $Apache::lonxml::counter=0;
149: $Apache::lonxml::counter_changed=0;
150:
151: sub xmlbegin {
152: my $output='';
153: if ($ENV{'browser.mathml'}) {
154: $output='<?xml version="1.0"?>'
155: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
156: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
157: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
158: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
159: .'xmlns="http://www.w3.org/TR/REC-html40">';
160: } else {
161: $output='<html>';
162: }
163: return $output;
164: }
165:
166: sub xmlend {
167: my ($discussiononly,$symb)=@_;
168: my $discussion='';
169: if ($ENV{'request.course.id'}) {
170: my $crs='/'.$ENV{'request.course.id'};
171: if ($ENV{'request.course.sec'}) {
172: $crs.='_'.$ENV{'request.course.sec'};
173: }
174: $crs=~s/\_/\//g;
175: my $seeid=&Apache::lonnet::allowed('rin',$crs);
176: unless ($symb) {
177: $symb=&Apache::lonnet::symbread();
178: }
179: if ($symb) {
180: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
181: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
182: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
183: if ($contrib{'version'}) {
184: unless ($discussiononly) {
185: $discussion.=
186: '<address><hr />';
187: }
188: my $idx;
189: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
190: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
191: unless (($hidden) && (!$seeid)) {
192: my $message=$contrib{$idx.':message'};
193: $message=~s/\n/\<br \/\>/g;
194: $message=&Apache::lontexconvert::msgtexconverted($message);
195: if ($message) {
196: if ($hidden) {
197: $message='<font color="#888888">'.$message.'</font>';
198: }
199: my $screenname=&Apache::loncommon::screenname(
200: $contrib{$idx.':sendername'},
201: $contrib{$idx.':senderdomain'});
202: my $plainname=&Apache::loncommon::nickname(
203: $contrib{$idx.':sendername'},
204: $contrib{$idx.':senderdomain'});
205:
206: my $sender='Anonymous';
207: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
208: $sender=&Apache::loncommon::aboutmewrapper(
209: $plainname,
210: $contrib{$idx.':sendername'},
211: $contrib{$idx.':senderdomain'}).' ('.
212: $contrib{$idx.':sendername'}.' at '.
213: $contrib{$idx.':senderdomain'}.')';
214: if ($contrib{$idx.':anonymous'}) {
215: $sender.=' [anonymous] '.
216: $screenname;
217: }
218: if ($seeid) {
219: if ($hidden) {
220: $sender.=' <a href="/adm/feedback?unhide='.
221: $symb.':::'.$idx.'">Make Visible</a>';
222: } else {
223: $sender.=' <a href="/adm/feedback?hide='.
224: $symb.':::'.$idx.'">Hide</a>';
225: }
226: }
227: } else {
228: if ($screenname) {
229: $sender='<i>'.$screenname.'</i>';
230: }
231: }
232: $discussion.='<p><b>'.$sender.'</b> ('.
233: localtime($contrib{$idx.':timestamp'}).
234: '):<blockquote>'.$message.
235: '</blockquote></p>';
236: }
237: }
238: }
239: unless ($discussiononly) {
240: $discussion.='</address>';
241: }
242: }
243: if ($discussiononly) {
244: $discussion.=(<<ENDDISCUSS);
245: <form action="/adm/feedback" method="post" name="mailform">
246: <input type="submit" name="discuss" value="Post Discussion" />
247: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
248: <input type="hidden" name="symb" value="$symb" />
249: <input type="hidden" name="sendit" value="true" />
250: <br />
251: <font size="1">Note: in anonymous discussion, your name is visible only to
252: course faculty</font><br />
253: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
254: </form>
255: ENDDISCUSS
256: $discussion.=&Apache::lonfeedback::generate_preview_button();
257: }
258: }
259: }
260: return $discussion.($discussiononly?'':'</html>');
261: }
262:
263: sub tokeninputfield {
264: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
265: $defhost=~tr/a-z/A-Z/;
266: return (<<ENDINPUTFIELD)
267: <script>
268: function updatetoken() {
269: var comp=new Array;
270: var barcode=unescape(document.tokeninput.barcode.value);
271: comp=barcode.split('*');
272: if (typeof(comp[0])!="undefined") {
273: document.tokeninput.codeone.value=comp[0];
274: }
275: if (typeof(comp[1])!="undefined") {
276: document.tokeninput.codetwo.value=comp[1];
277: }
278: if (typeof(comp[2])!="undefined") {
279: comp[2]=comp[2].toUpperCase();
280: document.tokeninput.codethree.value=comp[2];
281: }
282: document.tokeninput.barcode.value='';
283: }
284: </script>
285: <form method="post" name="tokeninput">
286: <table border="2" bgcolor="#FFFFBB">
287: <tr><th>DocID Checkin</th></tr>
288: <tr><td>
289: <table>
290: <tr>
291: <td>Scan in Barcode</td>
292: <td><input type="text" size="22" name="barcode"
293: onChange="updatetoken()"/></td>
294: </tr>
295: <tr><td><i>or</i> Type in DocID</td>
296: <td>
297: <input type="text" size="5" name="codeone" />
298: <b><font size="+2">*</font></b>
299: <input type="text" size="5" name="codetwo" />
300: <b><font size="+2">*</font></b>
301: <input type="text" size="10" name="codethree" value="$defhost"
302: onChange="this.value=this.value.toUpperCase()" />
303: </td></tr>
304: </table>
305: </td></tr>
306: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
307: </table>
308: </form>
309: ENDINPUTFIELD
310: }
311:
312: sub maketoken {
313: my ($symb,$tuname,$tudom,$tcrsid)=@_;
314: unless ($symb) {
315: $symb=&Apache::lonnet::symbread();
316: }
317: unless ($tuname) {
318: $tuname=$ENV{'user.name'};
319: $tudom=$ENV{'user.domain'};
320: $tcrsid=$ENV{'request.course.id'};
321: }
322:
323: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
324: }
325:
326: sub printtokenheader {
327: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
328: unless ($token) { return ''; }
329:
330: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
331: unless ($tsymb) {
332: $tsymb=$symb;
333: }
334: unless ($tuname) {
335: $tuname=$name;
336: $tudom=$domain;
337: $tcrsid=$courseid;
338: }
339:
340: my %reply=&Apache::lonnet::get('environment',
341: ['firstname','middlename','lastname','generation'],
342: $tudom,$tuname);
343: my $plainname=$reply{'firstname'}.' '.
344: $reply{'middlename'}.' '.
345: $reply{'lastname'}.' '.
346: $reply{'generation'};
347:
348: if ($target eq 'web') {
349: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
350: return
351: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
352: 'Checked out for '.$plainname.
353: '<br />User: '.$tuname.' at '.$tudom.
354: '<br />ID: '.$idhash{$tuname}.
355: '<br />CourseID: '.$tcrsid.
356: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
357: '<br />DocID: '.$token.
358: '<br />Time: '.localtime().'<hr />';
359: } else {
360: return $token;
361: }
362: }
363:
364: sub fontsettings() {
365: my $headerstring='';
366: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
367: $headerstring.=
368: '<meta Content-Type="text/html; charset=x-mac-roman">';
369: }
370: return $headerstring;
371: }
372:
373: sub registerurl {
374: my $forcereg=shift;
375: my $target = shift;
376: my $result = '';
377:
378: if ($target eq 'edit') {
379: $result .="<script>\n".
380: "if (typeof menu != 'undefined') {menu.currentURL=null;}\n".
381: &Apache::loncommon::browser_and_searcher_javascript().
382: "\n</script>\n";
383: }
384: if ((($ENV{'request.publicaccess'}) ||
385: (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
386: (!$forcereg)) {
387: return $result.
388: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
389: }
390: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
391: $Apache::lonxml::registered=1;
392: my $nothing='';
393: if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; }
394: my $newmail='';
395: if (&Apache::lonmsg::newmail()) {
396: $newmail='menu.setstatus("you have","messages");';
397: }
398: my $timesync='menu.syncclock(1000*'.time.');';
399: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
400: my $hwkadd='';
401: if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
402: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
403: $hwkadd.=(<<ENDSUBM);
404: menu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")');
405: ENDSUBM
406: }
407: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
408: $hwkadd.=(<<ENDGRDS);
409: menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")');
410: ENDGRDS
411: }
412: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
413: $hwkadd.=(<<ENDPARM);
414: menu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")');
415: ENDPARM
416: }
417: }
418: $result = (<<ENDREGTHIS);
419:
420: <script language="JavaScript">
421: // BEGIN LON-CAPA Internal
422:
423: function LONCAPAreg() {
424: menu=window.open("$nothing","LONCAPAmenu","",false);
425: menu.clearTimeout(menu.menucltim);
426: $timesync
427: $newmail
428: menu.currentURL=window.location.pathname;
429: menu.reloadURL=window.location.pathname;
430: menu.currentStale=0;
431: menu.clearbut(3,1);
432: menu.switchbutton
433: (6,3,'catalog.gif','catalog','info','catalog_info()');
434: menu.switchbutton
435: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
436: menu.switchbutton
437: (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)');
438: menu.switchbutton
439: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
440: menu.switchbutton
441: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
442: menu.switchbutton
443: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
444: menu.switchbutton
445: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
446: menu.switchbutton
447: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
448: menu.switchbutton
449: (9,3,'anot.gif','anno-','tations','annotate()');
450: $hwkadd
451: }
452:
453: function LONCAPAstale() {
454: menu=window.open("$nothing","LONCAPAmenu","",false);
455: menu.currentStale=1;
456: if (menu.reloadURL!='' && menu.reloadURL!= null) {
457: menu.switchbutton
458: (3,1,'reload.gif','return','location','go(reloadURL)');
459: }
460: menu.clearbut(7,1);
461: menu.clearbut(7,2);
462: menu.clearbut(7,3);
463: menu.menucltim=menu.setTimeout(
464: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
465: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
466: 2000);
467:
468: }
469:
470: // END LON-CAPA Internal
471: </script>
472: ENDREGTHIS
473:
474: } else {
475: $result = (<<ENDDONOTREGTHIS);
476:
477: <script language="JavaScript">
478: // BEGIN LON-CAPA Internal
479:
480: function LONCAPAreg() {
481: menu=window.open("$nothing","LONCAPAmenu","",false);
482: $timesync
483: menu.currentStale=1;
484: menu.clearbut(2,1);
485: menu.clearbut(2,3);
486: menu.clearbut(8,1);
487: menu.clearbut(8,2);
488: menu.clearbut(8,3);
489: if (menu.currentURL) {
490: menu.switchbutton
491: (3,1,'reload.gif','return','location','go(currentURL)');
492: } else {
493: menu.clearbut(3,1);
494: }
495: }
496:
497: function LONCAPAstale() {
498: }
499:
500: // END LON-CAPA Internal
501: </script>
502: ENDDONOTREGTHIS
503: }
504: return $result;
505: }
506:
507: sub loadevents() {
508: return 'LONCAPAreg();';
509: }
510:
511: sub unloadevents() {
512: return 'LONCAPAstale();';
513: }
514:
515: sub printalltags {
516: my $temp;
517: foreach $temp (sort keys %Apache::lonxml::alltags) {
518: &Apache::lonxml::debug("$temp -- ".
519: join(',',@{ $Apache::lonxml::alltags{$temp} }));
520: }
521: }
522:
523: sub xmlparse {
524: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
525:
526: &setup_globals($request,$target);
527: #
528: # do we have a course style file?
529: #
530:
531: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
532: my $bodytext=
533: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
534: if ($bodytext) {
535: my $location=&Apache::lonnet::filelocation('',$bodytext);
536: my $styletext=&Apache::lonnet::getfile($location);
537: if ($styletext ne '-1') {
538: %style_for_target = (%style_for_target,
539: &Apache::style::styleparser($target,$styletext));
540: }
541: }
542: }
543:
544: #&printalltags();
545: my @pars = ();
546: my $pwd=$ENV{'request.filename'};
547: $pwd =~ s:/[^/]*$::;
548: &newparser(\@pars,\$content_file_string,$pwd);
549:
550: my $safeeval = new Safe;
551: my $safehole = new Safe::Hole;
552: &init_safespace($target,$safeeval,$safehole,$safeinit);
553: #-------------------- Redefinition of the target in the case of compound target
554:
555: ($target, my @tenta) = split('&&',$target);
556:
557: my @stack = ();
558: my @parstack = ();
559: &initdepth;
560:
561: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
562: $safeeval,\%style_for_target);
563: if ($ENV{'request.uri'}) {
564: &writeallows($ENV{'request.uri'});
565: }
566: if ($Apache::lonxml::counter_changed) { &store_counter() }
567: return $finaloutput;
568: }
569:
570: sub htmlclean {
571: my ($raw,$full)=@_;
572:
573: my $tree = HTML::TreeBuilder->new;
574: $tree->ignore_unknown(0);
575:
576: $tree->parse($raw);
577:
578: my $output= $tree->as_HTML(undef,' ');
579:
580: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
581: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
582: unless ($full) {
583: $output=~s/\<[\/]*(body|head|html)\>//gis;
584: }
585:
586: $tree = $tree->delete;
587:
588: return $output;
589: }
590:
591: sub latex_special_symbols {
592: my ($current_token,$stack,$parstack)=@_;
593: $current_token=~s/\\/\\char92 /g;
594: $current_token=~s/\^/\\char94 /g;
595: $current_token=~s/\~/\\char126 /g;
596: $current_token=~s/(&[^a-z\#])/\\$1/g;
597: $current_token=~s/([^&])\#/$1\\#/g;
598: $current_token=~s/(\$|_|{|})/\\$1/g;
599: $current_token=~s/\\char92 /\\texttt{\\char92}/g;
600: $current_token=~s/>/\$>\$/g; #more
601: $current_token=~s/</\$<\$/g; #less
602: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
603: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
604: return $current_token;
605: }
606:
607: sub inner_xmlparse {
608: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
609: my $finaloutput = '';
610: my $result;
611: my $token;
612: while ( $#$pars > -1 ) {
613: while ($token = $$pars['-1']->get_token) {
614: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
615: if ($metamode<1) {
616: my $text=$token->[1];
617: if ($token->[0] eq 'C' && $target eq 'tex') {
618: $text = '%'.$text;
619: $text =~ s/[\n\r]//g;
620: }
621: $result.=$text;
622: }
623: } elsif ($token->[0] eq 'PI') {
624: if ($metamode<1) {
625: $result=$token->[2];
626: }
627: } elsif ($token->[0] eq 'S') {
628: # add tag to stack
629: push (@$stack,$token->[1]);
630: # add parameters list to another stack
631: push (@$parstack,&parstring($token));
632: &increasedepth($token);
633: if (exists $$style_for_target{$token->[1]}) {
634: if ($Apache::lonxml::redirection) {
635: $Apache::lonxml::outputstack['-1'] .=
636: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
637: $style_for_target,@$parstack);
638: } else {
639: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
640: $safeeval,$style_for_target,@$parstack);
641: }
642: } else {
643: $result = &callsub("start_$token->[1]", $target, $token, $stack,
644: $parstack, $pars, $safeeval, $style_for_target);
645: }
646: } elsif ($token->[0] eq 'E') {
647: #clear out any tags that didn't end
648: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
649: my $lasttag=$$stack[-1];
650: if ($token->[1] =~ /^$lasttag$/i) {
651: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
652: last;
653: } else {
654: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
655: &end_tag($stack,$parstack,$token);
656: }
657: }
658:
659: if (exists($$style_for_target{'/'."$token->[1]"})) {
660: if ($Apache::lonxml::redirection) {
661: $Apache::lonxml::outputstack['-1'] .=
662: &recurse($$style_for_target{'/'."$token->[1]"},
663: $target,$safeeval,$style_for_target,@$parstack);
664: } else {
665: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
666: $target,$safeeval,$style_for_target,
667: @$parstack);
668: }
669: } else {
670: $result = &callsub("end_$token->[1]", $target, $token, $stack,
671: $parstack, $pars,$safeeval, $style_for_target);
672: }
673: } else {
674: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
675: }
676: #evaluate variable refs in result
677: if ($result ne "") {
678: if ( $#$parstack > -1 ) {
679: $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
680: } else {
681: $result= &Apache::run::evaluate($result,$safeeval,'');
682: }
683: }
684: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
685: if ($target eq 'tex') {
686: $result=&latex_special_symbols($result,$stack,$parstack);
687: }
688: }
689:
690: # Encode any high ASCII characters
691: if (!$Apache::lonxml::prevent_entity_encode) {
692: $result=&HTML::Entities::encode($result,"\200-\377");
693: }
694: if ($Apache::lonxml::redirection) {
695: $Apache::lonxml::outputstack['-1'] .= $result;
696: } else {
697: $finaloutput.=$result;
698: }
699: $result = '';
700:
701: if ($token->[0] eq 'E') {
702: &end_tag($stack,$parstack,$token);
703: }
704: }
705: pop @$pars;
706: pop @Apache::lonxml::pwd;
707: }
708:
709: # if ($target eq 'meta') {
710: # $finaloutput.=&endredirection;
711: # }
712:
713:
714: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
715: $finaloutput=&afterburn($finaloutput);
716: }
717: return $finaloutput;
718: }
719:
720: sub recurse {
721: my @innerstack = ();
722: my @innerparstack = ();
723: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
724: my @pat = ();
725: &newparser(\@pat,\$newarg);
726: my $tokenpat;
727: my $partstring = '';
728: my $output='';
729: my $decls='';
730: &Apache::lonxml::debug("Recursing");
731: while ( $#pat > -1 ) {
732: while ($tokenpat = $pat[$#pat]->get_token) {
733: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
734: if ($metamode<1) { $partstring=$tokenpat->[1]; }
735: } elsif ($tokenpat->[0] eq 'PI') {
736: if ($metamode<1) { $partstring=$tokenpat->[2]; }
737: } elsif ($tokenpat->[0] eq 'S') {
738: push (@innerstack,$tokenpat->[1]);
739: push (@innerparstack,&parstring($tokenpat));
740: &increasedepth($tokenpat);
741: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
742: \@innerstack, \@innerparstack, \@pat,
743: $safeeval, $style_for_target);
744: } elsif ($tokenpat->[0] eq 'E') {
745: #clear out any tags that didn't end
746: while ($tokenpat->[1] ne $innerstack[$#innerstack]
747: && ($#innerstack > -1)) {
748: my $lasttag=$innerstack[-1];
749: if ($tokenpat->[1] =~ /^$lasttag$/i) {
750: &Apache::lonxml::warning('Using tag </'.$tokenpat->[1].'> as end tag to <'.$innerstack[-1].'>');
751: last;
752: } else {
753: &Apache::lonxml::warning('Found tag </'.$tokenpat->[1].'> when looking for </'.$innerstack[-1].'> in file');
754: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
755: }
756: }
757: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
758: \@innerstack, \@innerparstack, \@pat,
759: $safeeval, $style_for_target);
760: } else {
761: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
762: }
763: #pass both the variable to the style tag, and the tag we
764: #are processing inside the <definedtag>
765: if ( $partstring ne "" ) {
766: if ( $#parstack > -1 ) {
767: if ( $#innerparstack > -1 ) {
768: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
769: } else {
770: $decls= $parstack[$#parstack];
771: }
772: } else {
773: if ( $#innerparstack > -1 ) {
774: $decls=$innerparstack[$#innerparstack];
775: } else {
776: $decls='';
777: }
778: }
779: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
780: $partstring = '';
781: }
782: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
783: &decreasedepth($tokenpat);}
784: }
785: pop @pat;
786: pop @Apache::lonxml::pwd;
787: }
788: &Apache::lonxml::debug("Exiting Recursing");
789: return $output;
790: }
791:
792: sub callsub {
793: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
794: my $currentstring='';
795: my $nodefault;
796: {
797: my $sub1;
798: no strict 'refs';
799: my $tag=$token->[1];
800: my $space=$Apache::lonxml::alltags{$tag}[-1];
801: if (!$space) {
802: $tag=~tr/A-Z/a-z/;
803: $sub=~tr/A-Z/a-z/;
804: $space=$Apache::lonxml::alltags{$tag}[-1]
805: }
806:
807: my $deleted=0;
808: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
809: if (($token->[0] eq 'S') && ($target eq 'modified')) {
810: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
811: $parstack,$parser,$safeeval,
812: $style);
813: }
814: if (!$deleted) {
815: if ($space) {
816: &Apache::lonxml::debug("Calling sub $sub in $space $metamode");
817: $sub1="$space\:\:$sub";
818: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
819: $parstack,$parser,$safeeval,
820: $style);
821: } else {
822: &Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
823: if ($metamode <1) {
824: if (defined($token->[4]) && ($metamode < 1)) {
825: $currentstring = $token->[4];
826: } else {
827: $currentstring = $token->[2];
828: }
829: }
830: }
831: # &Apache::lonxml::debug("nodefalt:$nodefault:");
832: if ($currentstring eq '' && $nodefault eq '') {
833: if ($target eq 'edit') {
834: &Apache::lonxml::debug("doing default edit for $token->[1]");
835: if ($token->[0] eq 'S') {
836: $currentstring = &Apache::edit::tag_start($target,$token);
837: } elsif ($token->[0] eq 'E') {
838: $currentstring = &Apache::edit::tag_end($target,$token);
839: }
840: } elsif ($target eq 'modified') {
841: if ($token->[0] eq 'S') {
842: $currentstring = $token->[4];
843: $currentstring.=&Apache::edit::handle_insert();
844: } elsif ($token->[0] eq 'E') {
845: $currentstring = $token->[2];
846: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
847: } else {
848: $currentstring = $token->[2];
849: }
850: }
851: }
852: }
853: use strict 'refs';
854: }
855: return $currentstring;
856: }
857:
858: sub setup_globals {
859: my ($request,$target)=@_;
860: $Apache::lonxml::request=$request;
861: $Apache::lonxml::registered = 0;
862: $errorcount=0;
863: $warningcount=0;
864: $Apache::lonxml::default_homework_loaded=0;
865: &init_counter();
866: @Apache::lonxml::pwd=();
867: @Apache::lonxml::extlinks=();
868: if ($target eq 'meta') {
869: $Apache::lonxml::redirection = 0;
870: $Apache::lonxml::metamode = 1;
871: $Apache::lonxml::evaluate = 1;
872: $Apache::lonxml::import = 0;
873: } elsif ($target eq 'answer') {
874: $Apache::lonxml::redirection = 0;
875: $Apache::lonxml::metamode = 1;
876: $Apache::lonxml::evaluate = 1;
877: $Apache::lonxml::import = 1;
878: } elsif ($target eq 'grade') {
879: &startredirection;
880: $Apache::lonxml::metamode = 0;
881: $Apache::lonxml::evaluate = 1;
882: $Apache::lonxml::import = 1;
883: } elsif ($target eq 'modified') {
884: $Apache::lonxml::redirection = 0;
885: $Apache::lonxml::metamode = 0;
886: $Apache::lonxml::evaluate = 0;
887: $Apache::lonxml::import = 0;
888: } elsif ($target eq 'edit') {
889: $Apache::lonxml::redirection = 0;
890: $Apache::lonxml::metamode = 0;
891: $Apache::lonxml::evaluate = 0;
892: $Apache::lonxml::import = 0;
893: } elsif ($target eq 'analyze') {
894: $Apache::lonxml::redirection = 0;
895: $Apache::lonxml::metamode = 0;
896: $Apache::lonxml::evaluate = 1;
897: $Apache::lonxml::import = 1;
898: } else {
899: $Apache::lonxml::redirection = 0;
900: $Apache::lonxml::metamode = 0;
901: $Apache::lonxml::evaluate = 1;
902: $Apache::lonxml::import = 1;
903: }
904: }
905:
906: sub init_safespace {
907: my ($target,$safeeval,$safehole,$safeinit) = @_;
908: $safeeval->permit("entereval");
909: $safeeval->permit(":base_math");
910: $safeeval->permit("sort");
911: $safeeval->deny(":base_io");
912: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
913: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
914:
915: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
916: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
917: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
918: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
919: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
920: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
921: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
922: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
923: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
924: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
925: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
926: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
927: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
928: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
929: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
930: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
931: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
932: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
933: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
934: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
935: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
936: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
937: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
938: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
939: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
940: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
941: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
942: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
943: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
944: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
945: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
946: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
947: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
948: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
949: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
950: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
951: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
952: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
953: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
954: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
955:
956: #need to inspect this class of ops
957: # $safeeval->deny(":base_orig");
958: $safeinit .= ';$external::target="'.$target.'";';
959: my $rndseed;
960: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
961: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
962: $safeinit .= ';$external::randomseed='.$rndseed.';';
963: &Apache::run::run($safeinit,$safeeval);
964: }
965:
966: sub default_homework_load {
967: my ($safeeval)=@_;
968: &Apache::lonxml::debug('Loading default_homework');
969: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
970: if ($default == -1) {
971: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
972: } else {
973: &Apache::run::run($default,$safeeval);
974: $Apache::lonxml::default_homework_loaded=1;
975: }
976: }
977:
978: sub startredirection {
979: $Apache::lonxml::redirection++;
980: push (@Apache::lonxml::outputstack, '');
981: }
982:
983: sub endredirection {
984: if (!$Apache::lonxml::redirection) {
985: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
986: return '';
987: }
988: $Apache::lonxml::redirection--;
989: pop @Apache::lonxml::outputstack;
990: }
991:
992: sub end_tag {
993: my ($tagstack,$parstack,$token)=@_;
994: pop(@$tagstack);
995: pop(@$parstack);
996: &decreasedepth($token);
997: }
998:
999: sub initdepth {
1000: @Apache::lonxml::depthcounter=();
1001: $Apache::lonxml::depth=-1;
1002: $Apache::lonxml::olddepth=-1;
1003: }
1004:
1005: sub increasedepth {
1006: my ($token) = @_;
1007: $Apache::lonxml::depth++;
1008: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
1009: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
1010: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
1011: }
1012: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1013: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1014: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1015: }
1016:
1017: sub decreasedepth {
1018: my ($token) = @_;
1019: $Apache::lonxml::depth--;
1020: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
1021: $#Apache::lonxml::depthcounter--;
1022: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
1023: }
1024: if ( $Apache::lonxml::depth < -1) {
1025: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
1026: $Apache::lonxml::depth='-1';
1027: }
1028: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1029: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1030: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1031: }
1032:
1033: sub get_all_text_unbalanced {
1034: #there is a copy of this in lonpublisher.pm
1035: my($tag,$pars)= @_;
1036: my $token;
1037: my $result='';
1038: $tag='<'.$tag.'>';
1039: while ($token = $$pars[-1]->get_token) {
1040: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1041: $result.=$token->[1];
1042: } elsif ($token->[0] eq 'PI') {
1043: $result.=$token->[2];
1044: } elsif ($token->[0] eq 'S') {
1045: $result.=$token->[4];
1046: } elsif ($token->[0] eq 'E') {
1047: $result.=$token->[2];
1048: }
1049: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
1050: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1051: &Apache::lonxml::debug('Result is :'.$1);
1052: $result=$1;
1053: my $redo=$tag.$2;
1054: &Apache::lonxml::newparser($pars,\$redo);
1055: last;
1056: }
1057: }
1058: return $result
1059: }
1060:
1061: sub increment_counter {
1062: $Apache::lonxml::counter++;
1063: $Apache::lonxml::counter_changed=1;
1064: }
1065:
1066: sub init_counter {
1067: if (defined($ENV{'form.counter'})) {
1068: $Apache::lonxml::counter=$ENV{'form.counter'};
1069: } elsif (not defined($Apache::lonxml::counter)) {
1070: $Apache::lonxml::counter=1;
1071: &store_counter();
1072: }
1073: $Apache::lonxml::counter_changed=0;
1074: }
1075:
1076: sub store_counter {
1077: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1078: return '';
1079: }
1080:
1081: sub get_all_text {
1082: my($tag,$pars)= @_;
1083: my $depth=0;
1084: my $token;
1085: my $result='';
1086: if ( $tag =~ m:^/: ) {
1087: my $tag=substr($tag,1);
1088: # &Apache::lonxml::debug("have:$tag:");
1089: while (($depth >=0) && ($token = $pars->get_token)) {
1090: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
1091: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1092: $result.=$token->[1];
1093: } elsif ($token->[0] eq 'PI') {
1094: $result.=$token->[2];
1095: } elsif ($token->[0] eq 'S') {
1096: if ($token->[1] =~ /^$tag$/i) { $depth++; }
1097: $result.=$token->[4];
1098: } elsif ($token->[0] eq 'E') {
1099: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
1100: #skip sending back the last end tag
1101: if ($depth > -1) { $result.=$token->[2]; } else {
1102: $pars->unget_token($token);
1103: }
1104: }
1105: }
1106: } else {
1107: while ($token = $pars->get_token) {
1108: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1109: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1110: $result.=$token->[1];
1111: } elsif ($token->[0] eq 'PI') {
1112: $result.=$token->[2];
1113: } elsif ($token->[0] eq 'S') {
1114: if ( $token->[1] =~ /^$tag$/i) {
1115: $pars->unget_token($token); last;
1116: } else {
1117: $result.=$token->[4];
1118: }
1119: } elsif ($token->[0] eq 'E') {
1120: $result.=$token->[2];
1121: }
1122: }
1123: }
1124: # &Apache::lonxml::debug("Exit:$result:");
1125: return $result
1126: }
1127:
1128: sub newparser {
1129: my ($parser,$contentref,$dir) = @_;
1130: push (@$parser,HTML::LCParser->new($contentref));
1131: $$parser['-1']->xml_mode('1');
1132: if ( $dir eq '' ) {
1133: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1134: } else {
1135: push (@Apache::lonxml::pwd, $dir);
1136: }
1137: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
1138: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
1139: }
1140:
1141: sub parstring {
1142: my ($token) = @_;
1143: my $temp='';
1144: foreach (@{$token->[3]}) {
1145: unless ($_=~/\W/) {
1146: my $val=$token->[2]->{$_};
1147: $val =~ s/([\%\@\\\"])/\\$1/g;
1148: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1149: $temp .= "my \$$_=\"$val\";"
1150: }
1151: }
1152: return $temp;
1153: }
1154:
1155: sub writeallows {
1156: unless ($#extlinks>=0) { return; }
1157: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1158: if ($ENV{'httpref.'.$thisurl}) {
1159: $thisurl=$ENV{'httpref.'.$thisurl};
1160: }
1161: my $thisdir=$thisurl;
1162: $thisdir=~s/\/[^\/]+$//;
1163: my %httpref=();
1164: foreach (@extlinks) {
1165: $httpref{'httpref.'.
1166: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1167: }
1168: @extlinks=();
1169: &Apache::lonnet::appenv(%httpref);
1170: }
1171:
1172: #
1173: # Afterburner handles anchors, highlights and links
1174: #
1175: sub afterburn {
1176: my $result=shift;
1177: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1178: ['highlight','anchor','link']);
1179: if ($ENV{'form.highlight'}) {
1180: foreach (split(/\,/,$ENV{'form.highlight'})) {
1181: my $anchorname=$_;
1182: my $matchthis=$anchorname;
1183: $matchthis=~s/\_+/\\s\+/g;
1184: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1185: }
1186: }
1187: if ($ENV{'form.link'}) {
1188: foreach (split(/\,/,$ENV{'form.link'})) {
1189: my ($anchorname,$linkurl)=split(/\>/,$_);
1190: my $matchthis=$anchorname;
1191: $matchthis=~s/\_+/\\s\+/g;
1192: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1193: }
1194: }
1195: if ($ENV{'form.anchor'}) {
1196: my $anchorname=$ENV{'form.anchor'};
1197: my $matchthis=$anchorname;
1198: $matchthis=~s/\_+/\\s\+/g;
1199: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1200: $result.=(<<"ENDSCRIPT");
1201: <script>
1202: document.location.hash='$anchorname';
1203: </script>
1204: ENDSCRIPT
1205: }
1206: return $result;
1207: }
1208:
1209: sub storefile {
1210: my ($file,$contents)=@_;
1211: if (my $fh=Apache::File->new('>'.$file)) {
1212: print $fh $contents;
1213: $fh->close();
1214: } else {
1215: &warning("Unable to save file $file");
1216: }
1217: }
1218:
1219: sub createnewhtml {
1220: my $filecontents=(<<SIMPLECONTENT);
1221: <html>
1222: <head>
1223: <title>
1224: Title of Document Goes Here
1225: </title>
1226: </head>
1227: <body bgcolor="#FFFFFF">
1228:
1229: Body of Document Goes Here
1230:
1231: </body>
1232: </html>
1233: SIMPLECONTENT
1234: return $filecontents;
1235: }
1236:
1237:
1238: sub inserteditinfo {
1239: my ($result,$filecontents)=@_;
1240: $filecontents = &HTML::Entities::encode($filecontents);
1241: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1242: my $buttons=(<<BUTTONS);
1243: <input type="submit" name="attemptclean"
1244: value="Save and then attempt to clean HTML" />
1245: <input type="submit" name="savethisfile" value="Save this" />
1246: <input type="submit" name="viewmode" value="View" />
1247: BUTTONS
1248: my $editfooter=(<<ENDFOOTER);
1249: <hr />
1250: <a name="editsection" />
1251: <form method="post">
1252: <input type="hidden" name="editmode" value="Edit" />
1253: $buttons<br />
1254: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1255: <br />$buttons
1256: <br />
1257: </form>
1258: ENDFOOTER
1259: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1260: $result=~s/(\<\/body\>)/$editfooter/is;
1261: return $result;
1262: }
1263:
1264: sub get_target {
1265: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1266: if ( $ENV{'request.state'} eq 'published') {
1267: if ( defined($ENV{'form.grade_target'})
1268: && ($viewgrades == 'F' )) {
1269: return ($ENV{'form.grade_target'});
1270: } elsif (defined($ENV{'form.grade_target'})) {
1271: if (($ENV{'form.grade_target'} eq 'web') ||
1272: ($ENV{'form.grade_target'} eq 'tex') ) {
1273: return $ENV{'form.grade_target'}
1274: } else {
1275: return 'web';
1276: }
1277: } else {
1278: return 'web';
1279: }
1280: } elsif ($ENV{'request.state'} eq 'construct') {
1281: if ( defined($ENV{'form.grade_target'})) {
1282: return ($ENV{'form.grade_target'});
1283: } else {
1284: return 'web';
1285: }
1286: } else {
1287: return 'web';
1288: }
1289: }
1290:
1291: sub handler {
1292: my $request=shift;
1293:
1294: my $target=&get_target();
1295:
1296: $Apache::lonxml::debug=0;
1297:
1298: if ($ENV{'browser.mathml'}) {
1299: $request->content_type('text/xml');
1300: } else {
1301: $request->content_type('text/html');
1302: }
1303: &Apache::loncommon::no_cache($request);
1304: $request->send_http_header;
1305:
1306: return OK if $request->header_only;
1307:
1308:
1309: my $file=&Apache::lonnet::filelocation("",$request->uri);
1310: #
1311: # Edit action? Save file.
1312: #
1313: unless ($ENV{'request.state'} eq 'published') {
1314: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1315: &storefile($file,$ENV{'form.filecont'});
1316: }
1317: }
1318: my %mystyle;
1319: my $result = '';
1320: my $filecontents=&Apache::lonnet::getfile($file);
1321: if ($filecontents == -1) {
1322: $result=(<<ENDNOTFOUND);
1323: <html>
1324: <head>
1325: <title>File not found</title>
1326: </head>
1327: <body bgcolor="#FFFFFF">
1328: <b>File not found: $file</b>
1329: </body>
1330: </html>
1331: ENDNOTFOUND
1332: $filecontents='';
1333: if ($ENV{'request.state'} ne 'published') {
1334: $filecontents=&createnewhtml();
1335: $ENV{'form.editmode'}='Edit'; #force edit mode
1336: }
1337: } else {
1338: unless ($ENV{'request.state'} eq 'published') {
1339: if ($ENV{'form.attemptclean'}) {
1340: $filecontents=&htmlclean($filecontents,1);
1341: }
1342: }
1343: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1344: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1345: '',%mystyle);
1346: }
1347: }
1348:
1349: #
1350: # Edit action? Insert editing commands
1351: #
1352: unless ($ENV{'request.state'} eq 'published') {
1353: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1354: my $displayfile=$request->uri;
1355: $displayfile=~s/^\/[^\/]*//;
1356: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1357: '</h3></body></html>';
1358: $result=&inserteditinfo($result,$filecontents);
1359: }
1360: }
1361:
1362: writeallows($request->uri);
1363:
1364: $request->print($result);
1365:
1366: return OK;
1367: }
1368:
1369: sub debug {
1370: if ($Apache::lonxml::debug eq 1) {
1371: $|=1;
1372: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1373: }
1374: }
1375:
1376: sub error {
1377: $errorcount++;
1378: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1379: # If printing in construction space, put the error inside <pre></pre>
1380: print "<b>ERROR:</b>".join("\n",@_)."\n";
1381: } else {
1382: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1383: #notify author
1384: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1385: #notify course
1386: if ( $ENV{'request.course.id'} ) {
1387: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1388: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1389: foreach (keys %users) {
1390: my ($user,$domain) = split(/:/, $_);
1391: &Apache::lonmsg::user_normal_msg($user,$domain,
1392: "Error [$declutter]",join('<br />',@_));
1393: }
1394: }
1395:
1396: #FIXME probably shouldn't have me get everything forever.
1397: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1398: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1399: }
1400: }
1401:
1402: sub warning {
1403: $warningcount++;
1404: if ($ENV{'request.state'} eq 'construct') {
1405: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1406: }
1407: }
1408:
1409: sub get_param {
1410: my ($param,$parstack,$safeeval,$context) = @_;
1411: if ( ! $context ) { $context = -1; }
1412: my $args ='';
1413: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1414: if ( ! $args ) { return undef; }
1415: if ( $args =~ /my \$$param=\"/ ) {
1416: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1417: } else {
1418: return undef;
1419: }
1420: }
1421:
1422: sub get_param_var {
1423: my ($param,$parstack,$safeeval,$context) = @_;
1424: if ( ! $context ) { $context = -1; }
1425: my $args ='';
1426: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1427: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1428: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1429: if ($value =~ /^[\$\@\%]/) {
1430: return &Apache::run::run("return $value",$safeeval,1);
1431: } else {
1432: return $value;
1433: }
1434: }
1435:
1436: sub register_insert {
1437: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1438: my $i;
1439: my $tagnum=0;
1440: my @order;
1441: for ($i=0;$i < $#data; $i++) {
1442: my $line = $data[$i];
1443: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1444: if ( $line =~ /TABLE/ ) { last; }
1445: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1446: if ($tag) {
1447: $insertlist{"$tagnum.tag"} = $tag;
1448: $insertlist{"$tagnum.description"} = $descrip;
1449: $insertlist{"$tagnum.color"} = $color;
1450: $insertlist{"$tagnum.function"} = $function;
1451: if (!defined($show)) { $show='yes'; }
1452: $insertlist{"$tagnum.show"}= $show;
1453: $insertlist{"$tag.num"}=$tagnum;
1454: $tagnum++;
1455: }
1456: }
1457: $i++; #skipping TABLE line
1458: $tagnum = 0;
1459: for (;$i < $#data;$i++) {
1460: my $line = $data[$i];
1461: my ($mnemonic,@which) = split(/ +/,$line);
1462: my $tag = $insertlist{"$tagnum.tag"};
1463: for (my $j=0;$j <=$#which;$j++) {
1464: if ( $which[$j] eq 'Y' ) {
1465: if ($insertlist{"$j.show"} ne 'no') {
1466: push(@{ $insertlist{"$tag.which"} },$j);
1467: }
1468: }
1469: }
1470: $tagnum++;
1471: }
1472: }
1473:
1474: sub description {
1475: my ($token)=@_;
1476: my $tagnum;
1477: my $tag=$token->[1];
1478: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1479: my $testtag=$namespace.'::'.$tag;
1480: $tagnum=$insertlist{"$testtag.num"};
1481: if (defined($tagnum)) { last; }
1482: }
1483: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1484: return $insertlist{$tagnum.'.description'};
1485: }
1486:
1487: # ----------------------------------------------------------------- whichuser
1488: # returns a list of $symb, $courseid, $domain, $name that is correct for
1489: # calls to lonnet functions for this setup.
1490: # - looks for form.grade_ parameters
1491: sub whichuser {
1492: my ($symb,$courseid,$domain,$name);
1493: if (defined($ENV{'form.grade_symb'})) {
1494: my $tmp_courseid=$ENV{'form.grade_courseid'};
1495: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1496: if ($allowed) {
1497: $symb=$ENV{'form.grade_symb'};
1498: $courseid=$ENV{'form.grade_courseid'};
1499: $domain=$ENV{'form.grade_domain'};
1500: $name=$ENV{'form.grade_username'};
1501: }
1502: } else {
1503: $symb=&Apache::lonnet::symbread();
1504: $courseid=$ENV{'request.course.id'};
1505: $domain=$ENV{'user.domain'};
1506: $name=$ENV{'user.name'};
1507: }
1508: return ($symb,$courseid,$domain,$name);
1509: }
1510:
1511: 1;
1512: __END__
1513:
1514:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonxml.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / xml