Annotation of loncom/xml/lonxml.pm, revision 1.444

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.444   ! albertel    4: # $Id: lonxml.pm,v 1.443 2007/04/07 01:21:59 albertel Exp $
1.139     www         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: #
1.316     albertel   39: 
1.2       sakharuk   40: 
1.4       albertel   41: package Apache::lonxml; 
1.33      www        42: use vars 
1.410     albertel   43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
1.1       sakharuk   44: use strict;
1.444   ! albertel   45: use LONCAPA;
1.167     albertel   46: use HTML::LCParser();
1.161     albertel   47: use HTML::TreeBuilder();
                     48: use HTML::Entities();
                     49: use Safe();
                     50: use Safe::Hole();
                     51: use Math::Cephes();
                     52: use Math::Random();
                     53: use Opcode();
1.271     www        54: use POSIX qw(strftime);
1.339     albertel   55: use Time::HiRes qw( gettimeofday tv_interval );
1.393     albertel   56: use Symbol();
1.266     bowersj2   57: 
1.72      albertel   58: sub register {
1.141     albertel   59:   my ($space,@taglist) = @_;
                     60:   foreach my $temptag (@taglist) {
                     61:     push(@{ $Apache::lonxml::alltags{$temptag} },$space);
1.72      albertel   62:   }
                     63: }
                     64: 
1.141     albertel   65: sub deregister {
                     66:   my ($space,@taglist) = @_;
                     67:   foreach my $temptag (@taglist) {
                     68:     my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
                     69:     if ($tempspace eq $space) {
                     70:       pop(@{ $Apache::lonxml::alltags{$temptag} });
                     71:     }
                     72:   }
1.142     albertel   73:   #&printalltags();
1.141     albertel   74: }
                     75: 
1.46      www        76: use Apache::Constants qw(:common);
1.161     albertel   77: use Apache::lontexconvert();
                     78: use Apache::style();
                     79: use Apache::run();
                     80: use Apache::londefdef();
                     81: use Apache::scripttag();
1.285     www        82: use Apache::languagetags();
1.161     albertel   83: use Apache::edit();
1.266     bowersj2   84: use Apache::inputtags();
                     85: use Apache::outputtags();
1.372     albertel   86: use Apache::lonnet;
1.161     albertel   87: use Apache::File();
                     88: use Apache::loncommon();
1.198     www        89: use Apache::lonfeedback();
1.200     www        90: use Apache::lonmsg();
1.217     matthew    91: use Apache::loncacc();
1.431     www        92: use Apache::lonmaxima();
1.280     www        93: use Apache::lonlocal;
1.79      www        94: 
1.72      albertel   95: #==================================================   Main subroutine: xmlparse  
                     96: #debugging control, to turn on debugging modify the correct handler
                     97: $Apache::lonxml::debug=0;
1.206     albertel   98: 
                     99: # keeps count of the number of warnings and errors generated in a parse
                    100: $warningcount=0;
                    101: $errorcount=0;
1.72      albertel  102: 
                    103: #path to the directory containing the file currently being processed
                    104: @pwd=();
                    105: 
                    106: #these two are used for capturing a subset of the output for later processing,
                    107: #don't touch them directly use &startredirection and &endredirection
                    108: @outputstack = ();
                    109: $redirection = 0;
                    110: 
                    111: #controls wheter the <import> tag actually does
                    112: $import = 1;
                    113: @extlinks=();
                    114: 
                    115: # meta mode is a bit weird only some output is to be turned off
                    116: #<output> tag turns metamode off (defined in londefdef.pm)
                    117: $metamode = 0;
                    118: 
                    119: # turns on and of run::evaluate actually derefencing var refs
                    120: $evaluate = 1;
1.7       albertel  121: 
1.74      albertel  122: # data structure for eidt mode, determines what tags can go into what other tags
                    123: %insertlist=();
1.68      www       124: 
1.99      albertel  125: # stores the list of active tag namespaces
1.76      albertel  126: @namespace=();
                    127: 
1.172     albertel  128: # a pointer the the Apache request object
                    129: $Apache::lonxml::request='';
                    130: 
1.216     sakharuk  131: # a problem number counter, and check on ether it is used
1.237     sakharuk  132: $Apache::lonxml::counter=1;
1.204     albertel  133: $Apache::lonxml::counter_changed=0;
                    134: 
1.212     albertel  135: #internal check on whether to look at style defs
                    136: $Apache::lonxml::usestyle=1;
1.260     albertel  137: 
                    138: #locations used to store the parameter string for style substitutions
                    139: $Apache::lonxml::style_values='';
                    140: $Apache::lonxml::style_end_values='';
1.212     albertel  141: 
1.281     albertel  142: #array of ssi calls that need to occur after we are done parsing
                    143: @Apache::lonxml::ssi_info=();
                    144: 
1.282     albertel  145: #should we do the postag variable interpolation
                    146: $Apache::lonxml::post_evaluate=1;
                    147: 
1.295     albertel  148: #a header message to emit in the case of any generated warning or errors
                    149: $Apache::lonxml::warnings_error_header='';
                    150: 
1.396     foxr      151: #  Control whether or not LaTeX symbols should be substituted for their
                    152: #  \ style equivalents...this may be turned off e.g. in an verbatim
                    153: #  environment.
                    154: 
                    155: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
                    156: 
                    157: sub enable_LaTeX_substitutions {
                    158:     $Apache::lonxml::substitute_LaTeX_symbols = 1;
                    159: }
                    160: sub disable_LaTeX_substitutions {
                    161:     $Apache::lonxml::substitute_LaTeX_symbols = 0;
                    162: }
                    163: 
1.68      www       164: sub xmlend {
1.335     sakharuk  165:     my ($target,$parser)=@_;
1.278     www       166:     my $mode='xml';
                    167:     my $status='OPEN';
1.368     albertel  168:     if ($Apache::lonhomework::parsing_a_problem ||
                    169: 	$Apache::lonhomework::parsing_a_task ) {
1.278     www       170: 	$mode='problem';
                    171: 	$status=$Apache::inputtags::status[-1]; 
                    172:     }
1.362     matthew   173:     my $discussion;
1.379     albertel  174:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                    175: 					   ['LONCAPA_INTERNAL_no_discussion']);
1.372     albertel  176:     if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
                    177:         $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
1.362     matthew   178:         $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
                    179:     }
1.334     sakharuk  180:     if ($target eq 'tex') {
1.335     sakharuk  181: 	$discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
1.334     sakharuk  182: 	&Apache::lonxml::newparser($parser,\$discussion,'');
                    183: 	return '';
                    184:     }
1.405     albertel  185: 
1.407     albertel  186:     return $discussion;
1.119     www       187: }
                    188: 
                    189: sub tokeninputfield {
1.120     www       190:     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
                    191:     $defhost=~tr/a-z/A-Z/;
1.119     www       192:     return (<<ENDINPUTFIELD)
1.226     albertel  193: <script type="text/javascript">
1.120     www       194:     function updatetoken() {
                    195: 	var comp=new Array;
                    196:         var barcode=unescape(document.tokeninput.barcode.value);
                    197:         comp=barcode.split('*');
                    198:         if (typeof(comp[0])!="undefined") {
                    199: 	    document.tokeninput.codeone.value=comp[0];
                    200: 	}
                    201:         if (typeof(comp[1])!="undefined") {
                    202: 	    document.tokeninput.codetwo.value=comp[1];
                    203: 	}
                    204:         if (typeof(comp[2])!="undefined") {
                    205:             comp[2]=comp[2].toUpperCase();
                    206: 	    document.tokeninput.codethree.value=comp[2];
                    207: 	}
                    208:         document.tokeninput.barcode.value='';
                    209:     }  
                    210: </script>
                    211: <form method="post" name="tokeninput">
1.119     www       212: <table border="2" bgcolor="#FFFFBB">
                    213: <tr><th>DocID Checkin</th></tr>
                    214: <tr><td>
                    215: <table>
                    216: <tr>
                    217: <td>Scan in Barcode</td>
1.120     www       218: <td><input type="text" size="22" name="barcode" 
                    219: onChange="updatetoken()"/></td>
1.119     www       220: </tr>
                    221: <tr><td><i>or</i> Type in DocID</td>
                    222: <td>
                    223: <input type="text" size="5" name="codeone" />
1.120     www       224: <b><font size="+2">*</font></b>
1.119     www       225: <input type="text" size="5" name="codetwo" />
1.120     www       226: <b><font size="+2">*</font></b>
                    227: <input type="text" size="10" name="codethree" value="$defhost" 
                    228: onChange="this.value=this.value.toUpperCase()" />
1.119     www       229: </td></tr>
                    230: </table>
                    231: </td></tr>
                    232: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
                    233: </table>
                    234: </form>
                    235: ENDINPUTFIELD
1.112     www       236: }
                    237: 
1.116     www       238: sub maketoken {
1.118     www       239:     my ($symb,$tuname,$tudom,$tcrsid)=@_;
1.112     www       240:     unless ($symb) {
                    241: 	$symb=&Apache::lonnet::symbread();
                    242:     }
                    243:     unless ($tuname) {
1.372     albertel  244: 	$tuname=$env{'user.name'};
                    245:         $tudom=$env{'user.domain'};
                    246:         $tcrsid=$env{'request.course.id'};
1.112     www       247:     }
1.116     www       248: 
1.118     www       249:     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
                    250: }
                    251: 
                    252: sub printtokenheader {
1.133     albertel  253:     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
1.116     www       254:     unless ($token) { return ''; }
1.118     www       255: 
1.423     albertel  256:     my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1.133     albertel  257:     unless ($tsymb) {
                    258: 	$tsymb=$symb;
1.118     www       259:     }
                    260:     unless ($tuname) {
1.133     albertel  261: 	$tuname=$name;
                    262:         $tudom=$domain;
                    263:         $tcrsid=$courseid;
1.118     www       264:     }
1.114     www       265: 
1.390     albertel  266:     my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
1.114     www       267: 
1.112     www       268:     if ($target eq 'web') {
1.145     www       269:         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
1.115     www       270: 	return 
1.221     albertel  271:  '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
1.284     www       272:                &mt('Checked out for').' '.$plainname.
                    273:                '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
                    274: 	       '<br />'.&mt('ID').': '.$idhash{$tuname}.
                    275: 	       '<br />'.&mt('CourseID').': '.$tcrsid.
1.372     albertel  276: 	       '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
1.284     www       277:                '<br />'.&mt('DocID').': '.$token.
                    278:                '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
1.112     www       279:     } else {
1.121     albertel  280:         return $token;
1.112     www       281:     }
1.68      www       282: }
                    283: 
1.48      albertel  284: sub printalltags {
                    285:   my $temp;
                    286:   foreach $temp (sort keys %Apache::lonxml::alltags) {
1.141     albertel  287:     &Apache::lonxml::debug("$temp -- ".
                    288: 		  join(',',@{ $Apache::lonxml::alltags{$temp} }));
1.48      albertel  289:   }
                    290: }
1.31      sakharuk  291: 
1.3       sakharuk  292: sub xmlparse {
1.172     albertel  293:  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96      albertel  294: 
1.172     albertel  295:  &setup_globals($request,$target);
1.232     albertel  296:  &Apache::inputtags::initialize_inputtags();
1.370     albertel  297:  &Apache::bridgetask::initialize_bridgetask();
1.232     albertel  298:  &Apache::outputtags::initialize_outputtags();
                    299:  &Apache::edit::initialize_edit();
1.287     albertel  300:  &Apache::londefdef::initialize_londefdef();
1.244     albertel  301: 
1.178     www       302: #
                    303: # do we have a course style file?
                    304: #
                    305: 
1.372     albertel  306:  if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
1.178     www       307:      my $bodytext=
1.372     albertel  308: 	 $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
1.178     www       309:      if ($bodytext) {
1.337     albertel  310: 	 foreach my $file (split(',',$bodytext)) {
                    311: 	     my $location=&Apache::lonnet::filelocation('',$file);
                    312: 	     my $styletext=&Apache::lonnet::getfile($location);
                    313: 	     if ($styletext ne '-1') {
                    314: 		 %style_for_target = (%style_for_target,
                    315: 				      &Apache::style::styleparser($target,$styletext));
                    316: 	     }
                    317: 	 }
                    318:      }
1.372     albertel  319:  } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
                    320:      my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
1.291     sakharuk  321:      my $styletext=&Apache::lonnet::getfile($location);
                    322:        if ($styletext ne '-1') {
                    323:           %style_for_target = (%style_for_target,
                    324:                           &Apache::style::styleparser($target,$styletext));
                    325:       }
1.178     www       326:  }
1.255     sakharuk  327: #&printalltags();
1.16      albertel  328:  my @pars = ();
1.372     albertel  329:  my $pwd=$env{'request.filename'};
1.23      albertel  330:  $pwd =~ s:/[^/]*$::;
                    331:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  332: 
1.3       sakharuk  333:  my $safeeval = new Safe;
1.40      albertel  334:  my $safehole = new Safe::Hole;
1.82      ng        335:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  336: #-------------------- Redefinition of the target in the case of compound target
                    337: 
                    338:  ($target, my @tenta) = split('&&',$target);
                    339: 
1.150     albertel  340:  my @stack = ();
1.3       sakharuk  341:  my @parstack = ();
1.358     albertel  342:  &initdepth();
                    343:  &init_alarm();
1.101     albertel  344:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
1.394     albertel  345: 				   $safeeval,\%style_for_target,1);
1.255     sakharuk  346: 
1.425     albertel  347:  if (@stack) {
                    348:      &warning("At end of file some tags were still left unclosed, ".
                    349: 	      '<tt>&lt;'.join('&gt;</tt>, <tt>&lt;',reverse(@stack)).
                    350: 	      '&gt;</tt>');
                    351:  }
1.372     albertel  352:  if ($env{'request.uri'}) {
                    353:     &writeallows($env{'request.uri'});
1.125     www       354:  }
1.281     albertel  355:  &do_registered_ssi();
1.204     albertel  356:  if ($Apache::lonxml::counter_changed) { &store_counter() }
1.393     albertel  357: 
                    358:  &clean_safespace($safeeval);
                    359: 
1.372     albertel  360:  if ($env{'form.return_only_error_and_warning_counts'}) {
1.361     www       361:      return "$errorcount:$warningcount";
                    362:  }
1.3       sakharuk  363:  return $finaloutput;
1.106     www       364: }
                    365: 
1.191     albertel  366: sub latex_special_symbols {
1.272     albertel  367:     my ($string,$where)=@_;
1.396     foxr      368:     #
                    369:     #  If e.g. in verbatim mode, then don't substitute.
                    370:     #  but return original string.
                    371:     #
                    372:     if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
                    373: 	return $string;
                    374:     }
1.235     sakharuk  375:     if ($where eq 'header') {
1.414     foxr      376: 	$string =~ s/\\/\$\\backslash\$/g; # \  -> $\backslash$ per LaTex line by line pg  10.
1.311     albertel  377: 	$string =~ s/(\$|%|\{|\})/\\$1/g;
                    378: 	$string=&Apache::lonprintout::character_chart($string);
                    379: 	# any & or # leftover should be safe to just escape
                    380:         $string=~s/([^\\])\&/$1\\\&/g;
                    381:         $string=~s/([^\\])\#/$1\\\#/g;
1.415     foxr      382: 	$string =~ s/_/\\_/g;              # _ -> \_
                    383: 	$string =~ s/\^/\\\^{}/g;          # ^ -> \^{} 
1.229     sakharuk  384:     } else {
1.312     albertel  385: 	$string=~s/\\/\\ensuremath{\\backslash}/g;
1.367     albertel  386: 	$string=~s/\\\%|\%/\\\%/g;
                    387: 	$string=~s/\\{|{/\\{/g;
                    388: 	$string=~s/\\}|}/\\}/g;
1.378     albertel  389: 	$string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
1.367     albertel  390: 	$string=~s/\\\$|\$/\\\$/g;
                    391: 	$string=~s/\\\_|\_/\\\_/g;
1.313     albertel  392:         $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
1.310     sakharuk  393: 	$string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
1.311     albertel  394: 	$string=&Apache::lonprintout::character_chart($string);
                    395: 	# any & or # leftover should be safe to just escape
1.367     albertel  396: 	$string=~s/\\\&|\&/\\\&/g;
                    397: 	$string=~s/\\\#|\#/\\\#/g;
1.332     sakharuk  398:         $string=~s/\|/\$\\mid\$/g;
1.310     sakharuk  399: #single { or } How to escape?
1.229     sakharuk  400:     }
1.272     albertel  401:     return $string;
1.188     sakharuk  402: }
                    403: 
1.101     albertel  404: sub inner_xmlparse {
1.394     albertel  405:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
1.101     albertel  406:   my $finaloutput = '';
                    407:   my $result;
                    408:   my $token;
1.258     albertel  409:   my $dontpop=0;
1.389     albertel  410:   my $startredirection = $Apache::lonxml::redirection;
1.101     albertel  411:   while ( $#$pars > -1 ) {
                    412:     while ($token = $$pars['-1']->get_token) {
1.261     albertel  413:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
1.101     albertel  414: 	if ($metamode<1) {
1.190     albertel  415: 	    my $text=$token->[1];
1.193     albertel  416: 	    if ($token->[0] eq 'C' && $target eq 'tex') {
1.239     sakharuk  417: 		$text = '';
                    418: #		$text = '%'.$text."\n";
1.182     sakharuk  419: 	    }
1.190     albertel  420: 	    $result.=$text;
1.101     albertel  421: 	}
1.261     albertel  422:       } elsif (($token->[0] eq 'D')) {
                    423: 	if ($metamode<1 && $target eq 'web') {
                    424: 	    my $text=$token->[1];
                    425: 	    $result.=$text;
                    426: 	}
1.101     albertel  427:       } elsif ($token->[0] eq 'PI') {
1.261     albertel  428: 	if ($metamode<1 && $target eq 'web') {
1.101     albertel  429: 	  $result=$token->[2];
                    430: 	}
                    431:       } elsif ($token->[0] eq 'S') {
1.140     albertel  432: 	# add tag to stack
1.101     albertel  433: 	push (@$stack,$token->[1]);
                    434: 	# add parameters list to another stack
                    435: 	push (@$parstack,&parstring($token));
1.140     albertel  436: 	&increasedepth($token);
1.212     albertel  437: 	if ($Apache::lonxml::usestyle &&
                    438: 	    exists($$style_for_target{$token->[1]})) {
                    439: 	    $Apache::lonxml::usestyle=0;
                    440: 	    my $string=$$style_for_target{$token->[1]}.
                    441: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    442: 	    &Apache::lonxml::newparser($pars,\$string);
1.257     albertel  443: 	    $Apache::lonxml::style_values=$$parstack[-1];
1.259     albertel  444: 	    $Apache::lonxml::style_end_values=$$parstack[-1];
1.101     albertel  445: 	} else {
                    446: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    447: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  448: 	}
1.101     albertel  449:       } elsif ($token->[0] eq 'E') {
1.212     albertel  450: 	if ($Apache::lonxml::usestyle &&
                    451: 	    exists($$style_for_target{'/'."$token->[1]"})) {
                    452: 	    $Apache::lonxml::usestyle=0;
                    453: 	    my $string=$$style_for_target{'/'.$token->[1]}.
1.258     albertel  454: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
1.212     albertel  455: 	    &Apache::lonxml::newparser($pars,\$string);
1.259     albertel  456: 	    $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
                    457: 	    $Apache::lonxml::style_end_values='';
1.258     albertel  458: 	    $dontpop=1;
1.101     albertel  459: 	} else {
1.258     albertel  460: 	    #clear out any tags that didn't end
                    461: 	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
                    462: 		my $lasttag=$$stack[-1];
1.317     albertel  463: 		if ($token->[1] =~ /^\Q$lasttag\E$/i) {
1.258     albertel  464: 		    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' as end tag to &lt;'.$$stack[-1].'&gt;');
                    465: 		    last;
                    466: 		} else {
                    467: 		    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' when looking for &lt;/'.$$stack[-1].'&gt; in file');
                    468: 		    &end_tag($stack,$parstack,$token);
                    469: 		}
                    470: 	    }
                    471: 	    $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    472: 			       $parstack, $pars,$safeeval, $style_for_target);
1.101     albertel  473: 	}
                    474:       } else {
                    475: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    476:       }
                    477:       #evaluate variable refs in result
1.282     albertel  478:       if ($Apache::lonxml::post_evaluate &&$result ne "") {
1.257     albertel  479: 	  my $extras;
                    480: 	  if (!$Apache::lonxml::usestyle) {
                    481: 	      $extras=$Apache::lonxml::style_values;
                    482: 	  }
1.101     albertel  483: 	if ( $#$parstack > -1 ) {
1.257     albertel  484: 	  $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
1.101     albertel  485: 	} else {
1.257     albertel  486: 	  $result= &Apache::run::evaluate($result,$safeeval,$extras);
1.101     albertel  487: 	}
1.163     albertel  488:       }
1.282     albertel  489:       $Apache::lonxml::post_evaluate=1;
                    490: 
1.190     albertel  491:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.249     albertel  492: 	  #Style file definitions should be correct
1.250     albertel  493: 	  if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
1.311     albertel  494: 	      $result=&latex_special_symbols($result);
1.249     albertel  495: 	  }
1.190     albertel  496:       }
                    497: 
1.169     albertel  498:       if ($Apache::lonxml::redirection) {
                    499: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    500:       } else {
                    501: 	$finaloutput.=$result;
                    502:       }
                    503:       $result = '';
                    504: 
1.258     albertel  505:       if ($token->[0] eq 'E' && !$dontpop) {
1.101     albertel  506: 	&end_tag($stack,$parstack,$token);
                    507:       }
1.258     albertel  508:       $dontpop=0;
1.224     albertel  509:     }	
1.212     albertel  510:     if ($#$pars > -1) {
                    511: 	pop @$pars;
                    512: 	pop @Apache::lonxml::pwd;
                    513:     }
1.101     albertel  514:   }
                    515: 
                    516:   # if ($target eq 'meta') {
                    517:   #   $finaloutput.=&endredirection;
                    518:   # }
                    519: 
1.394     albertel  520:   if ( $start && $target eq 'grade') { &endredirection(); }
1.389     albertel  521:   if ( $Apache::lonxml::redirection > $startredirection) {
                    522:       while ($Apache::lonxml::redirection > $startredirection) {
                    523: 	  $finaloutput .= &endredirection();
1.387     albertel  524:       }
                    525:   }
1.101     albertel  526:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    527:     $finaloutput=&afterburn($finaloutput);
1.216     sakharuk  528:   }	    
1.101     albertel  529:   return $finaloutput;
                    530: }
1.67      www       531: 
1.318     matthew   532: ## 
                    533: ## Looks to see if there is a subroutine defined for this tag.  If so, call it,
                    534: ## otherwise do not call it as we do not know what it is.
                    535: ##
1.7       albertel  536: sub callsub {
1.84      albertel  537:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  538:   my $currentstring='';
1.72      albertel  539:   my $nodefault;
1.7       albertel  540:   {
1.59      albertel  541:     my $sub1;
1.7       albertel  542:     no strict 'refs';
1.68      www       543:     my $tag=$token->[1];
1.236     www       544: # get utterly rid of extended html tags
                    545:     if ($tag=~/^x\-/i) { return ''; }
1.141     albertel  546:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       547:     if (!$space) {
1.141     albertel  548:      	$tag=~tr/A-Z/a-z/;
1.68      www       549: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  550: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       551:     }
1.97      albertel  552: 
                    553:     my $deleted=0;
                    554:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    555:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    556: 					     $parstack,$parser,$safeeval,
                    557: 					     $style);
                    558:     }
                    559:     if (!$deleted) {
                    560:       if ($space) {
1.220     albertel  561: 	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  562: 	$sub1="$space\:\:$sub";
                    563: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    564: 					     $parstack,$parser,$safeeval,
                    565: 					     $style);
                    566:       } else {
1.318     matthew   567:           if ($target eq 'tex') {
                    568:               # throw away tag name
                    569:               return '';
                    570:           }
1.220     albertel  571: 	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
1.97      albertel  572: 	if ($metamode <1) {
                    573: 	  if (defined($token->[4]) && ($metamode < 1)) {
                    574: 	    $currentstring = $token->[4];
                    575: 	  } else {
                    576: 	    $currentstring = $token->[2];
                    577: 	  }
1.62      sakharuk  578: 	}
1.7       albertel  579:       }
1.97      albertel  580:       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
                    581:       if ($currentstring eq '' && $nodefault eq '') {
                    582: 	if ($target eq 'edit') {
1.220     albertel  583: 	  #&Apache::lonxml::debug("doing default edit for $token->[1]");
1.97      albertel  584: 	  if ($token->[0] eq 'S') {
                    585: 	    $currentstring = &Apache::edit::tag_start($target,$token);
                    586: 	  } elsif ($token->[0] eq 'E') {
                    587: 	    $currentstring = &Apache::edit::tag_end($target,$token);
                    588: 	  }
1.441     albertel  589: 	}
                    590:       }
                    591:       if ($target eq 'modified' && $nodefault eq '') {
                    592: 	  if ($currentstring eq '') {
                    593: 	      if ($token->[0] eq 'S') {
                    594: 		  $currentstring = $token->[4];
                    595: 	      } elsif ($token->[0] eq 'E') {
                    596: 		  $currentstring = $token->[2];
                    597: 	      } else {
                    598: 		  $currentstring = $token->[2];
                    599: 	      }
                    600: 	  }
1.97      albertel  601: 	  if ($token->[0] eq 'S') {
                    602: 	    $currentstring.=&Apache::edit::handle_insert();
1.210     www       603: 	  } elsif ($token->[0] eq 'E') {
                    604:             $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
1.97      albertel  605: 	  }
1.72      albertel  606:       }
1.7       albertel  607:     }
                    608:     use strict 'refs';
                    609:   }
                    610:   return $currentstring;
1.82      ng        611: }
                    612: 
1.96      albertel  613: sub setup_globals {
1.172     albertel  614:   my ($request,$target)=@_;
                    615:   $Apache::lonxml::request=$request;
1.205     www       616:   $errorcount=0;
                    617:   $warningcount=0;
1.207     albertel  618:   $Apache::lonxml::default_homework_loaded=0;
1.212     albertel  619:   $Apache::lonxml::usestyle=1;
1.204     albertel  620:   &init_counter();
1.101     albertel  621:   @Apache::lonxml::pwd=();
1.124     albertel  622:   @Apache::lonxml::extlinks=();
1.281     albertel  623:   @Apache::lonxml::ssi_info=();
1.282     albertel  624:   $Apache::lonxml::post_evaluate=1;
1.295     albertel  625:   $Apache::lonxml::warnings_error_header='';
1.397     albertel  626:   $Apache::lonxml::substitute_LaTeX_symbols = 1;
1.96      albertel  627:   if ($target eq 'meta') {
                    628:     $Apache::lonxml::redirection = 0;
                    629:     $Apache::lonxml::metamode = 1;
                    630:     $Apache::lonxml::evaluate = 1;
                    631:     $Apache::lonxml::import = 0;
1.129     albertel  632:   } elsif ($target eq 'answer') {
                    633:     $Apache::lonxml::redirection = 0;
                    634:     $Apache::lonxml::metamode = 1;
                    635:     $Apache::lonxml::evaluate = 1;
                    636:     $Apache::lonxml::import = 1;
1.96      albertel  637:   } elsif ($target eq 'grade') {
1.387     albertel  638:     &startredirection(); #ended in inner_xmlparse on exit
1.96      albertel  639:     $Apache::lonxml::metamode = 0;
                    640:     $Apache::lonxml::evaluate = 1;
                    641:     $Apache::lonxml::import = 1;
                    642:   } elsif ($target eq 'modified') {
                    643:     $Apache::lonxml::redirection = 0;
                    644:     $Apache::lonxml::metamode = 0;
                    645:     $Apache::lonxml::evaluate = 0;
                    646:     $Apache::lonxml::import = 0;
                    647:   } elsif ($target eq 'edit') {
                    648:     $Apache::lonxml::redirection = 0;
                    649:     $Apache::lonxml::metamode = 0;
                    650:     $Apache::lonxml::evaluate = 0;
                    651:     $Apache::lonxml::import = 0;
1.163     albertel  652:   } elsif ($target eq 'analyze') {
                    653:     $Apache::lonxml::redirection = 0;
                    654:     $Apache::lonxml::metamode = 0;
                    655:     $Apache::lonxml::evaluate = 1;
                    656:     $Apache::lonxml::import = 1;
1.96      albertel  657:   } else {
                    658:     $Apache::lonxml::redirection = 0;
                    659:     $Apache::lonxml::metamode = 0;
                    660:     $Apache::lonxml::evaluate = 1;
                    661:     $Apache::lonxml::import = 1;
                    662:   }
                    663: }
                    664: 
1.82      ng        665: sub init_safespace {
                    666:   my ($target,$safeeval,$safehole,$safeinit) = @_;
1.393     albertel  667:   $safeeval->deny_only(':dangerous');
                    668:   $safeeval->reval('use Math::Complex;');
1.383     albertel  669:   $safeeval->permit_only(":default");
1.82      ng        670:   $safeeval->permit("entereval");
                    671:   $safeeval->permit(":base_math");
                    672:   $safeeval->permit("sort");
1.286     albertel  673:   $safeeval->permit("time");
1.371     albertel  674:   $safeeval->deny("rand");
                    675:   $safeeval->deny("srand");
1.82      ng        676:   $safeeval->deny(":base_io");
1.102     albertel  677:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.251     albertel  678:   $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
1.82      ng        679:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
1.324     albertel  680:   $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
                    681: 		  '&chem_standard_order');
1.369     albertel  682:   $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
1.324     albertel  683: 
1.431     www       684:   $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
1.432     www       685:   $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
1.433     albertel  686:   $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
                    687: 		  '&maxima_cas_formula_fix');
                    688: 
                    689:   $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
                    690: 		  '&capa_formula_fix');
1.431     www       691: 
1.82      ng        692:   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
                    693:   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
                    694:   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
                    695:   $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
                    696:   $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
                    697:   $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
                    698:   $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
                    699:   $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
                    700:   $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
                    701:   $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
                    702:   $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
                    703:   $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
                    704:   $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
                    705:   $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
                    706:   $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
                    707:   $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
                    708:   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
                    709:   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
                    710:   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.215     albertel  711:   
                    712:   $safehole->wrap(\&Math::Cephes::bdtr  ,$safeeval,'&bdtr'  );
                    713:   $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
                    714:   $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
                    715:   $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
                    716:   $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
                    717:   $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
                    718:   $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
                    719:   $safehole->wrap(\&Math::Cephes::fdtr  ,$safeeval,'&fdtr'  );
                    720:   $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
                    721:   $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
                    722:   $safehole->wrap(\&Math::Cephes::gdtr  ,$safeeval,'&gdtr'  );
                    723:   $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
                    724:   $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
                    725:   $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
                    726:   $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
                    727:   $safehole->wrap(\&Math::Cephes::ndtr  ,$safeeval,'&ndtr'  );
                    728:   $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
                    729:   $safehole->wrap(\&Math::Cephes::pdtr  ,$safeeval,'&pdtr'  );
                    730:   $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
                    731:   $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
                    732:   $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
                    733:   $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
                    734: 
1.383     albertel  735:   $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
                    736:   $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
                    737: 		  '&Math::Cephes::Matrix::new');
                    738:   $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
                    739: 		  '&Math::Cephes::Matrix::coef');
                    740:   $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
                    741: 		  '&Math::Cephes::Matrix::clr');
                    742:   $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
                    743: 		  '&Math::Cephes::Matrix::add');
                    744:   $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
                    745: 		  '&Math::Cephes::Matrix::sub');
                    746:   $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
                    747: 		  '&Math::Cephes::Matrix::mul');
                    748:   $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
                    749: 		  '&Math::Cephes::Matrix::div');
                    750:   $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
                    751: 		  '&Math::Cephes::Matrix::inv');
                    752:   $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
                    753: 		  '&Math::Cephes::Matrix::transp');
                    754:   $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
                    755: 		  '&Math::Cephes::Matrix::simq');
                    756:   $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
                    757: 		  '&Math::Cephes::Matrix::mat_to_vec');
                    758:   $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
                    759: 		  '&Math::Cephes::Matrix::vec_to_mat');
                    760:   $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
                    761: 		  '&Math::Cephes::Matrix::check');
                    762:   $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
                    763: 		  '&Math::Cephes::Matrix::check');
                    764: 
1.215     albertel  765: #  $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
                    766: #  $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
                    767: #  $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
                    768: #  $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
                    769: #  $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
                    770: #  $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
                    771: 
1.91      ng        772:   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
                    773:   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
                    774:   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
                    775:   $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
                    776:   $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
                    777:   $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
                    778:   $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
                    779:   $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
                    780:   $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
                    781:   $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
                    782:   $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93      ng        783:   $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91      ng        784:   $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
                    785:   $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
                    786:   $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
                    787:   $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
                    788:   $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
                    789:   $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
                    790:   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
                    791:   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
                    792:   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
1.305     albertel  793:   $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
1.311     albertel  794:   $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
1.420     albertel  795:   $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
                    796:   $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
1.322     albertel  797:   $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
1.430     albertel  798: #  use Data::Dumper;
                    799: #  $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
1.82      ng        800: #need to inspect this class of ops
                    801: # $safeeval->deny(":base_orig");
1.331     albertel  802:   $safeeval->permit("require");
1.91      ng        803:   $safeinit .= ';$external::target="'.$target.'";';
1.82      ng        804:   &Apache::run::run($safeinit,$safeeval);
1.373     albertel  805:   &initialize_rndseed($safeeval);
                    806: }
1.303     albertel  807: 
1.393     albertel  808: sub clean_safespace {
                    809:     my ($safeeval) = @_;
                    810:     delete_package_recurse($safeeval->{Root});
                    811: }
                    812: 
                    813: sub delete_package_recurse {
                    814:      my ($package) = @_;
                    815:      my @subp;
                    816:      {
                    817: 	 no strict 'refs';
                    818: 	 while (my ($key,$val) = each(%{*{"$package\::"}})) {
                    819: 	     if (!defined($val)) { next; }
                    820: 	     local (*ENTRY) = $val;
                    821: 	     if (defined *ENTRY{HASH} && $key =~ /::$/ &&
                    822: 		 $key ne "main::" && $key ne "<none>::")
                    823: 	     {
                    824: 		 my ($p) = $package ne "main" ? "$package\::" : "";
                    825: 		 ($p .= $key) =~ s/::$//;
                    826: 		 push(@subp,$p);
                    827: 	     }
                    828: 	 }
                    829:      }
                    830:      foreach my $p (@subp) {
                    831: 	 delete_package_recurse($p);
                    832:      }
                    833:      Symbol::delete_package($package);
                    834: }
                    835: 
1.373     albertel  836: sub initialize_rndseed {
                    837:     my ($safeeval)=@_;
                    838:     my $rndseed;
1.423     albertel  839:     my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1.373     albertel  840:     $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
                    841:     my $safeinit = '$external::randomseed="'.$rndseed.'";';
                    842:     &Apache::lonxml::debug("Setting rndseed to $rndseed");
                    843:     &Apache::run::run($safeinit,$safeeval);
1.207     albertel  844: }
                    845: 
                    846: sub default_homework_load {
                    847:     my ($safeeval)=@_;
                    848:     &Apache::lonxml::debug('Loading default_homework');
                    849:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1.241     albertel  850:     if ($default eq -1) {
1.207     albertel  851: 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
                    852:     } else {
                    853: 	&Apache::run::run($default,$safeeval);
                    854: 	$Apache::lonxml::default_homework_loaded=1;
                    855:     }
1.17      albertel  856: }
                    857: 
1.358     albertel  858: {
                    859:     my $alarm_depth;
                    860:     sub init_alarm {
                    861: 	alarm(0);
                    862: 	$alarm_depth=0;
                    863:     }
                    864: 
                    865:     sub start_alarm {
                    866: 	if ($alarm_depth<1) {
                    867: 	    my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
                    868: 	    if ($old) {
                    869: 		&Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
                    870: 	    }
                    871: 	}
                    872: 	$alarm_depth++;
                    873:     }
                    874: 
                    875:     sub end_alarm {
                    876: 	$alarm_depth--;
                    877: 	if ($alarm_depth<1) { alarm(0); }
                    878:     }
                    879: }
1.328     albertel  880: my $metamode_was;
1.55      albertel  881: sub startredirection {
1.328     albertel  882:     if (!$Apache::lonxml::redirection) {
                    883: 	$metamode_was=$Apache::lonxml::metamode;
                    884:     }
                    885:     $Apache::lonxml::metamode=0;
                    886:     $Apache::lonxml::redirection++;
                    887:     push (@Apache::lonxml::outputstack, '');
1.55      albertel  888: }
                    889: 
                    890: sub endredirection {
1.328     albertel  891:     if (!$Apache::lonxml::redirection) {
1.380     www       892: 	&Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
1.328     albertel  893: 	return '';
                    894:     }
                    895:     $Apache::lonxml::redirection--;
                    896:     if (!$Apache::lonxml::redirection) {
                    897: 	$Apache::lonxml::metamode=$metamode_was;
                    898:     }
                    899:     pop @Apache::lonxml::outputstack;
1.97      albertel  900: }
                    901: 
                    902: sub end_tag {
                    903:   my ($tagstack,$parstack,$token)=@_;
                    904:   pop(@$tagstack);
                    905:   pop(@$parstack);
                    906:   &decreasedepth($token);
1.55      albertel  907: }
                    908: 
1.17      albertel  909: sub initdepth {
                    910:   @Apache::lonxml::depthcounter=();
1.439     albertel  911:   undef($Apache::lonxml::last_depth_count);
1.17      albertel  912: }
                    913: 
1.438     albertel  914: 
1.339     albertel  915: my @timers;
                    916: my $lasttime;
1.438     albertel  917: # @Apache::lonxml::depthcounter -> count of tags that exist so
                    918: #                                  far at each level
1.439     albertel  919: # $Apache::lonxml::last_depth_count -> when ascending, need to
                    920: # remember the count for the level below the current level (for
                    921: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
1.438     albertel  922: 
1.17      albertel  923: sub increasedepth {
1.19      albertel  924:   my ($token) = @_;
1.439     albertel  925:   push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
                    926:   undef($Apache::lonxml::last_depth_count);
1.340     albertel  927:   my $time;
                    928:   if ($Apache::lonxml::debug eq "1") {
                    929:       push(@timers,[&gettimeofday()]);
                    930:       $time=&tv_interval($lasttime);
                    931:       $lasttime=[&gettimeofday()];
                    932:   }
1.439     albertel  933:   my $spacing='  'x($#Apache::lonxml::depthcounter);
1.438     albertel  934:   $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
1.439     albertel  935: #  &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
1.54      albertel  936: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  937: }
                    938: 
                    939: sub decreasedepth {
1.19      albertel  940:   my ($token) = @_;
1.439     albertel  941:   if (  $#Apache::lonxml::depthcounter == -1) {
                    942:       &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1.43      albertel  943:   }
1.439     albertel  944:   $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
                    945: 
1.340     albertel  946:   my ($timer,$time);
                    947:   if ($Apache::lonxml::debug eq "1") {
                    948:       $timer=pop(@timers);
                    949:       $time=&tv_interval($lasttime);
                    950:       $lasttime=[&gettimeofday()];
                    951:   }
1.439     albertel  952:   my $spacing='  'x($#Apache::lonxml::depthcounter);
                    953:   $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
                    954: #  &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
1.54      albertel  955: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  956: }
1.19      albertel  957: 
1.399     albertel  958: sub get_id {
                    959:     my ($parstack,$safeeval)=@_;
                    960:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                    961:     if ($env{'request.state'} eq 'construct' && $id =~ /(\.|_)/) {
                    962: 	&error(&mt("IDs are not allowed to contain &quot;<tt>_</tt>&quot; or &quot;<tt>.</tt>&quot;"));
                    963:     }
                    964:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
                    965:     return $id;
                    966: }
                    967: 
1.180     albertel  968: sub get_all_text_unbalanced {
1.190     albertel  969: #there is a copy of this in lonpublisher.pm
1.326     albertel  970:     my($tag,$pars)= @_;
                    971:     my $token;
                    972:     my $result='';
                    973:     $tag='<'.$tag.'>';
                    974:     while ($token = $$pars[-1]->get_token) {
                    975: 	if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1.386     albertel  976: 	    if ($token->[0] eq 'T' && $token->[2]) {
1.382     albertel  977: 		$result.='<![CDATA['.$token->[1].']]>';
                    978: 	    } else {
                    979: 		$result.=$token->[1];
                    980: 	    }
1.326     albertel  981: 	} elsif ($token->[0] eq 'PI') {
                    982: 	    $result.=$token->[2];
                    983: 	} elsif ($token->[0] eq 'S') {
                    984: 	    $result.=$token->[4];
                    985: 	} elsif ($token->[0] eq 'E')  {
                    986: 	    $result.=$token->[2];
                    987: 	}
                    988: 	if ($result =~ /\Q$tag\E/is) {
                    989: 	    ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
                    990: 	    #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    991: 	    #&Apache::lonxml::debug('Result is :'.$1);
                    992: 	    $redo=$tag.$redo;
                    993: 	    &Apache::lonxml::newparser($pars,\$redo);
                    994: 	    last;
                    995: 	}
                    996:     }
                    997:     return $result
1.204     albertel  998: }
                    999: 
                   1000: sub increment_counter {
1.247     albertel 1001:     my ($increment) = @_;
1.289     sakharuk 1002:     if (defined($increment) && $increment gt 0) {
                   1003: 	$Apache::lonxml::counter+=$increment;
                   1004:     } else {
                   1005: 	$Apache::lonxml::counter++;
1.247     albertel 1006:     }
1.289     sakharuk 1007:     $Apache::lonxml::counter_changed=1;
1.204     albertel 1008: }
                   1009: 
                   1010: sub init_counter {
1.391     albertel 1011:     if ($env{'request.state'} eq 'construct') {
                   1012: 	$Apache::lonxml::counter=1;
                   1013: 	$Apache::lonxml::counter_changed=1;
                   1014:     } elsif (defined($env{'form.counter'})) {
1.372     albertel 1015: 	$Apache::lonxml::counter=$env{'form.counter'};
1.247     albertel 1016: 	$Apache::lonxml::counter_changed=0;
1.237     sakharuk 1017:     } else {
1.204     albertel 1018: 	$Apache::lonxml::counter=1;
1.247     albertel 1019: 	$Apache::lonxml::counter_changed=1;
1.204     albertel 1020:     }
                   1021: }
                   1022: 
                   1023: sub store_counter {
                   1024:     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1.401     albertel 1025:     $Apache::lonxml::counter_changed=0;
1.204     albertel 1026:     return '';
1.180     albertel 1027: }
                   1028: 
1.398     albertel 1029: {
                   1030:     my $state;
                   1031:     sub clear_problem_counter {
                   1032: 	undef($state);
                   1033: 	&Apache::lonnet::delenv('form.counter');
                   1034: 	&Apache::lonxml::init_counter();
                   1035: 	&Apache::lonxml::store_counter();
                   1036:     }
                   1037: 
                   1038:     sub remember_problem_counter {
1.422     albertel 1039: 	&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1.398     albertel 1040: 	$state = $env{'form.counter'};
                   1041:     }
                   1042: 
                   1043:     sub restore_problem_counter {
                   1044: 	if (defined($state)) {
                   1045: 	    &Apache::lonnet::appenv(('form.counter' => $state));
                   1046: 	}
                   1047:     }
1.401     albertel 1048:     sub get_problem_counter {
                   1049: 	if ($Apache::lonxml::counter_changed) { &store_counter() }
1.422     albertel 1050: 	&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1.401     albertel 1051: 	return $env{'form.counter'};
                   1052:     }
1.398     albertel 1053: }
                   1054: 
1.19      albertel 1055: sub get_all_text {
1.270     albertel 1056:     my($tag,$pars,$style)= @_;
                   1057:     my $gotfullstack=1;
                   1058:     if (ref($pars) ne 'ARRAY') {
                   1059: 	$gotfullstack=0;
                   1060: 	$pars=[$pars];
                   1061:     }
                   1062:     if (ref($style) ne 'HASH') {
                   1063: 	$style={};
                   1064:     }
                   1065:     my $depth=0;
                   1066:     my $token;
                   1067:     my $result='';
                   1068:     if ( $tag =~ m:^/: ) { 
                   1069: 	my $tag=substr($tag,1); 
                   1070: 	#&Apache::lonxml::debug("have:$tag:");
                   1071: 	my $top_empty=0;
                   1072: 	while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
                   1073: 	    while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
                   1074: 		#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
                   1075: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1.382     albertel 1076: 		    if ($token->[2]) {
                   1077: 			$result.='<![CDATA['.$token->[1].']]>';
                   1078: 		    } else {
                   1079: 			$result.=$token->[1];
                   1080: 		    }
1.270     albertel 1081: 		} elsif ($token->[0] eq 'PI') {
                   1082: 		    $result.=$token->[2];
                   1083: 		} elsif ($token->[0] eq 'S') {
1.316     albertel 1084: 		    if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
                   1085: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                   1086: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel 1087: 		    $result.=$token->[4];
                   1088: 		} elsif ($token->[0] eq 'E')  {
1.316     albertel 1089: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1.270     albertel 1090: 		    #skip sending back the last end tag
1.283     albertel 1091: 		    if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1.270     albertel 1092: 			my $string=
                   1093: 			    '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
                   1094: 				$$style{'/'.$token->[1]}.
                   1095: 				    $token->[2].
                   1096: 					'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                   1097: 			&Apache::lonxml::newparser($pars,\$string);
                   1098: 			#&Apache::lonxml::debug("reParsing $string");
                   1099: 			next;
                   1100: 		    }
                   1101: 		    if ($depth > -1) {
                   1102: 			$result.=$token->[2];
                   1103: 		    } else {
                   1104: 			$$pars[-1]->unget_token($token);
                   1105: 		    }
                   1106: 		}
                   1107: 	    }
                   1108: 	    if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
                   1109: 	    if (($depth >=0) && ($#$pars > 0) ) {
                   1110: 		pop(@$pars);
                   1111: 		pop(@Apache::lonxml::pwd);
                   1112: 	    }
                   1113: 	}
                   1114: 	if ($top_empty && $depth >= 0) {
                   1115: 	    #never found the end tag ran out of text, throw error send back blank
                   1116: 	    &error('Never found end tag for &lt;'.$tag.
                   1117: 		   '&gt; current string <pre>'.
1.314     albertel 1118: 		   &HTML::Entities::encode($result,'<>&"').
1.270     albertel 1119: 		   '</pre>');
                   1120: 	    if ($gotfullstack) {
                   1121: 		my $newstring='</'.$tag.'>'.$result;
                   1122: 		&Apache::lonxml::newparser($pars,\$newstring);
                   1123: 	    }
                   1124: 	    $result='';
                   1125: 	}
                   1126:     } else {
                   1127: 	while ($#$pars > -1) {
                   1128: 	    while ($token = $$pars[-1]->get_token) {
                   1129: 		#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                   1130: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||
                   1131: 		    ($token->[0] eq 'D')) {
1.382     albertel 1132: 		    if ($token->[2]) {
                   1133: 			$result.='<![CDATA['.$token->[1].']]>';
                   1134: 		    } else {
                   1135: 			$result.=$token->[1];
                   1136: 		    }
1.270     albertel 1137: 		} elsif ($token->[0] eq 'PI') {
                   1138: 		    $result.=$token->[2];
                   1139: 		} elsif ($token->[0] eq 'S') {
1.316     albertel 1140: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) {
1.270     albertel 1141: 			$$pars[-1]->unget_token($token); last;
                   1142: 		    } else {
                   1143: 			$result.=$token->[4];
                   1144: 		    }
1.316     albertel 1145: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                   1146: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel 1147: 		} elsif ($token->[0] eq 'E')  {
                   1148: 		    $result.=$token->[2];
                   1149: 		}
                   1150: 	    }
                   1151: 	    if (($#$pars > 0) ) {
                   1152: 		pop(@$pars);
                   1153: 		pop(@Apache::lonxml::pwd);
                   1154: 	    } else { last; }
                   1155: 	}
                   1156:     }
                   1157:     #&Apache::lonxml::debug("Exit:$result:");
                   1158:     return $result
1.19      albertel 1159: }
                   1160: 
1.23      albertel 1161: sub newparser {
                   1162:   my ($parser,$contentref,$dir) = @_;
1.167     albertel 1163:   push (@$parser,HTML::LCParser->new($contentref));
1.365     albertel 1164:   $$parser[-1]->xml_mode(1);
                   1165:   $$parser[-1]->marked_sections(1);
1.23      albertel 1166:   if ( $dir eq '' ) {
                   1167:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                   1168:   } else {
                   1169:     push (@Apache::lonxml::pwd, $dir);
                   1170:   } 
                   1171: }
1.1       sakharuk 1172: 
1.8       albertel 1173: sub parstring {
1.417     albertel 1174:     my ($token) = @_;
                   1175:     my (@vars,@values);
                   1176:     foreach my $attr (@{$token->[3]}) {
                   1177: 	if ($attr!~/\W/) {
                   1178: 	    my $val=$token->[2]->{$attr};
                   1179: 	    $val =~ s/([\%\@\\\"\'])/\\$1/g;
                   1180: 	    $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
                   1181: 	    $val =~ s/(\$)$/\\$1/;
                   1182: 	    #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
                   1183: 	    push(@vars,"\$$attr");
                   1184: 	    push(@values,"\"$val\"");
                   1185: 	}
                   1186:     }
                   1187:     my $var_init = 
                   1188: 	(@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
                   1189: 	        : '';
                   1190:     return $var_init;
1.8       albertel 1191: }
1.22      albertel 1192: 
1.384     albertel 1193: sub extlink {
                   1194:     my ($res,$exact)=@_;
                   1195:     if (!$exact) {
                   1196: 	$res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
                   1197:     }
                   1198:     push(@Apache::lonxml::extlinks,$res)	 
                   1199: }
                   1200: 
1.34      www      1201: sub writeallows {
1.126     www      1202:     unless ($#extlinks>=0) { return; }
1.377     albertel 1203:     my $thisurl = &Apache::lonnet::clutter(shift);
1.372     albertel 1204:     if ($env{'httpref.'.$thisurl}) {
                   1205: 	$thisurl=$env{'httpref.'.$thisurl};
1.111     www      1206:     }
1.34      www      1207:     my $thisdir=$thisurl;
                   1208:     $thisdir=~s/\/[^\/]+$//;
                   1209:     my %httpref=();
1.142     albertel 1210:     foreach (@extlinks) {
1.34      www      1211:        $httpref{'httpref.'.
1.444   ! albertel 1212:  	        &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1.142     albertel 1213:     }
1.126     www      1214:     @extlinks=();
1.34      www      1215:     &Apache::lonnet::appenv(%httpref);
                   1216: }
                   1217: 
1.281     albertel 1218: sub register_ssi {
                   1219:     my ($url,%form)=@_;
                   1220:     push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
                   1221:     return '';
                   1222: }
                   1223: 
                   1224: sub do_registered_ssi {
                   1225:     foreach my $info (@Apache::lonxml::ssi_info) {
                   1226: 	my %form=%{ $info->{'form'}};
                   1227: 	my $url=$info->{'url'};
                   1228: 	&Apache::lonnet::ssi($url,%form);
                   1229:     }
                   1230: }
1.66      www      1231: #
                   1232: # Afterburner handles anchors, highlights and links
                   1233: #
                   1234: sub afterburn {
                   1235:     my $result=shift;
1.154     albertel 1236:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1237: 					    ['highlight','anchor','link']);
1.372     albertel 1238:     if ($env{'form.highlight'}) {
                   1239:        foreach (split(/\,/,$env{'form.highlight'})) {
1.66      www      1240:            my $anchorname=$_;
                   1241: 	   my $matchthis=$anchorname;
                   1242:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1243:            $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1244:        }
1.66      www      1245:     }
1.372     albertel 1246:     if ($env{'form.link'}) {
                   1247:        foreach (split(/\,/,$env{'form.link'})) {
1.66      www      1248:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1249: 	   my $matchthis=$anchorname;
                   1250:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1251:            $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1252:        }
1.66      www      1253:     }
1.372     albertel 1254:     if ($env{'form.anchor'}) {
                   1255:         my $anchorname=$env{'form.anchor'};
1.66      www      1256: 	my $matchthis=$anchorname;
                   1257:         $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1258:         $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1.66      www      1259:         $result.=(<<"ENDSCRIPT");
1.226     albertel 1260: <script type="text/javascript">
1.66      www      1261:     document.location.hash='$anchorname';
                   1262: </script>
                   1263: ENDSCRIPT
                   1264:     }
                   1265:     return $result;
                   1266: }
                   1267: 
1.79      www      1268: sub storefile {
                   1269:     my ($file,$contents)=@_;
1.290     albertel 1270:     &Apache::lonnet::correct_line_ends(\$contents);
1.79      www      1271:     if (my $fh=Apache::File->new('>'.$file)) {
                   1272: 	print $fh $contents;
                   1273:         $fh->close();
1.271     www      1274:         return 1;
1.147     albertel 1275:     } else {
1.271     www      1276: 	&warning("Unable to save file $file");
                   1277: 	return 0;
1.79      www      1278:     }
                   1279: }
                   1280: 
1.151     albertel 1281: sub createnewhtml {
1.321     www      1282:     my $title=&mt('Title of document goes here');
                   1283:     my $body=&mt('Body of document goes here');
                   1284:     my $filecontents=(<<SIMPLECONTENT);
1.78      www      1285: <html>
                   1286: <head>
1.321     www      1287: <title>$title</title>
1.78      www      1288: </head>
                   1289: <body bgcolor="#FFFFFF">
1.321     www      1290: $body
1.78      www      1291: </body>
                   1292: </html>
                   1293: SIMPLECONTENT
1.321     www      1294:     return $filecontents;
1.151     albertel 1295: }
                   1296: 
1.274     albertel 1297: sub createnewsty {
                   1298:   my $filecontents=(<<SIMPLECONTENT);
                   1299: <definetag name="">
                   1300:     <render>
                   1301:        <web></web>
                   1302:        <tex></tex>
                   1303:     </render>
                   1304: </definetag>
                   1305: SIMPLECONTENT
                   1306:   return $filecontents;
                   1307: }
                   1308: 
1.147     albertel 1309: 
1.151     albertel 1310: sub inserteditinfo {
1.274     albertel 1311:       my ($result,$filecontents,$filetype)=@_;
1.314     albertel 1312:       $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1.147     albertel 1313: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.274     albertel 1314:       my $xml_help = '';
1.321     www      1315:       my $initialize='';
1.274     albertel 1316:       if ($filetype eq 'html') {
1.323     www      1317: 	  my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1.410     albertel 1318: 	  $initialize=&Apache::lonhtmlcommon::spellheader();
1.347     albertel 1319: 	  if (!&Apache::lonhtmlcommon::htmlareablocked() &&
                   1320: 	      &Apache::lonhtmlcommon::htmlareabrowser()) {
                   1321: 	      $initialize.=(<<FULLPAGE);
1.321     www      1322: <script type="text/javascript">
1.323     www      1323: $addbuttons
                   1324: 
1.321     www      1325:     HTMLArea.loadPlugin("FullPage");
                   1326: 
                   1327:     function initDocument() {
1.323     www      1328: 	var editor=new HTMLArea("filecont",config);
1.321     www      1329: 	editor.registerPlugin(FullPage);
                   1330: 	editor.generate();
                   1331:     }
                   1332: </script>
                   1333: FULLPAGE
1.347     albertel 1334:           } else {
                   1335: 	      $initialize.=(<<FULLPAGE);
                   1336: <script type="text/javascript">
                   1337: $addbuttons
                   1338:     function initDocument() {
                   1339:     }
                   1340: </script>
                   1341: FULLPAGE
                   1342: 	  }
1.321     www      1343:           $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
                   1344: 	  $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1.274     albertel 1345:       }
                   1346:       my $cleanbut = '';
1.374     www      1347: 
1.254     albertel 1348:       my $titledisplay=&display_title();
1.426     banghart 1349:       my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
                   1350: 					 'vi' => 'Save and View',
1.427     banghart 1351: 					 'dv' => 'Discard Edits and View',
1.428     banghart 1352: 					 'un' => 'undo',
1.280     www      1353: 					 'ed' => 'Edit');
1.161     albertel 1354:       my $buttons=(<<BUTTONS);
1.274     albertel 1355: $cleanbut
1.428     banghart 1356: <input type="submit" name="discardview" accesskey="d"  value="$lt{'dv'}" />
                   1357: <input type="submit" name="Undo" accesskey="u"  value="$lt{'un'}" /><hr>
1.304     matthew  1358: <input type="submit" name="savethisfile" accesskey="s"  value="$lt{'st'}" />
                   1359: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1.161     albertel 1360: BUTTONS
1.333     www      1361:       $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1.78      www      1362:       my $editfooter=(<<ENDFOOTER);
1.321     www      1363: $initialize
1.78      www      1364: <hr />
                   1365: <a name="editsection" />
1.333     www      1366: <form method="post" name="xmledit">
1.240     albertel 1367: $xml_help
1.280     www      1368: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1.170     www      1369: $buttons<br />
1.366     albertel 1370: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1.170     www      1371: <br />$buttons
1.78      www      1372: <br />
                   1373: </form>
1.254     albertel 1374: $titledisplay
1.321     www      1375: </body>
1.78      www      1376: ENDFOOTER
1.147     albertel 1377: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1378:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1379:       return $result;
                   1380: }
                   1381: 
1.152     albertel 1382: sub get_target {
1.372     albertel 1383:   my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
                   1384:   if ( $env{'request.state'} eq 'published') {
                   1385:     if ( defined($env{'form.grade_target'})
1.152     albertel 1386: 	 && ($viewgrades == 'F' )) {
1.372     albertel 1387:       return ($env{'form.grade_target'});
                   1388:     } elsif (defined($env{'form.grade_target'})) {
                   1389:       if (($env{'form.grade_target'} eq 'web') ||
                   1390: 	  ($env{'form.grade_target'} eq 'tex') ) {
                   1391: 	return $env{'form.grade_target'}
1.153     albertel 1392:       } else {
                   1393: 	return 'web';
                   1394:       }
1.152     albertel 1395:     } else {
                   1396:       return 'web';
                   1397:     }
1.372     albertel 1398:   } elsif ($env{'request.state'} eq 'construct') {
                   1399:     if ( defined($env{'form.grade_target'})) {
                   1400:       return ($env{'form.grade_target'});
1.152     albertel 1401:     } else {
                   1402:       return 'web';
                   1403:     }
                   1404:   } else {
                   1405:     return 'web';
                   1406:   }
                   1407: }
                   1408: 
1.24      sakharuk 1409: sub handler {
1.255     sakharuk 1410:     my $request=shift;
                   1411:     
                   1412:     my $target=&get_target();
                   1413:     
1.372     albertel 1414:     $Apache::lonxml::debug=$env{'user.debug'};
1.255     sakharuk 1415:     
1.364     albertel 1416:     &Apache::loncommon::content_type($request,'text/html');
1.255     sakharuk 1417:     &Apache::loncommon::no_cache($request);
1.372     albertel 1418:     if ($env{'request.state'} eq 'published') {
1.363     albertel 1419: 	$request->set_last_modified(&Apache::lonnet::metadata($request->uri,
                   1420: 							      'lastrevisiondate'));
                   1421:     }
1.255     sakharuk 1422:     $request->send_http_header;
                   1423:     
                   1424:     return OK if $request->header_only;
1.68      www      1425: 
                   1426: 
1.255     sakharuk 1427:     my $file=&Apache::lonnet::filelocation("",$request->uri);
1.274     albertel 1428:     my $filetype;
                   1429:     if ($file =~ /\.sty$/) {
                   1430: 	$filetype='sty';
                   1431:     } else {
                   1432: 	$filetype='html';
                   1433:     }
1.78      www      1434: #
                   1435: # Edit action? Save file.
                   1436: #
1.428     banghart 1437:     if (!($env{'request.state'} eq 'published')) {
                   1438: 	if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1.429     albertel 1439: 	    my $html_file=&Apache::lonnet::getfile($file);
                   1440: 	    my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1.255     sakharuk 1441: 	}
                   1442:     }
                   1443:     my %mystyle;
                   1444:     my $result = '';
                   1445:     my $filecontents=&Apache::lonnet::getfile($file);
                   1446:     if ($filecontents eq -1) {
1.402     albertel 1447: 	my $start_page=&Apache::loncommon::start_page('File Error');
1.412     albertel 1448: 	my $end_page=&Apache::loncommon::end_page();
1.284     www      1449: 	my $fnf=&mt('File not found');
1.255     sakharuk 1450: 	$result=(<<ENDNOTFOUND);
1.402     albertel 1451: $start_page
1.284     www      1452: <b>$fnf: $file</b>
1.402     albertel 1453: $end_page
1.78      www      1454: ENDNOTFOUND
1.343     albertel 1455:         $filecontents='';
1.372     albertel 1456: 	if ($env{'request.state'} ne 'published') {
1.274     albertel 1457: 	    if ($filetype eq 'sty') {
                   1458: 		$filecontents=&createnewsty();
                   1459: 	    } else {
                   1460: 		$filecontents=&createnewhtml();
                   1461: 	    }
1.372     albertel 1462: 	    $env{'form.editmode'}='Edit'; #force edit mode
1.255     sakharuk 1463: 	}
                   1464:     } else {
1.372     albertel 1465: 	unless ($env{'request.state'} eq 'published') {
1.343     albertel 1466: 	    if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1.381     www      1467: 		&Apache::lonxml::error(&mt('This file appears to be a rendering of a LON-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
1.343     albertel 1468: 	    }
1.264     www      1469: #
                   1470: # we are in construction space, see if edit mode forced
1.385     albertel 1471:             &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1472: 						    ['editmode']);
1.255     sakharuk 1473: 	}
1.427     banghart 1474: 	if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1.255     sakharuk 1475: 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1476: 						'',%mystyle);
1.368     albertel 1477: 	    undef($Apache::lonhomework::parsing_a_task);
1.385     albertel 1478: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1479: 						    ['rawmode']);
1.395     albertel 1480: 	    if ($env{'form.rawmode'}) { $result = $filecontents; }
1.255     sakharuk 1481: 	}
1.147     albertel 1482:     }
1.255     sakharuk 1483:     
1.78      www      1484: #
                   1485: # Edit action? Insert editing commands
                   1486: #
1.372     albertel 1487:     unless ($env{'request.state'} eq 'published') {
1.427     banghart 1488: 	if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
                   1489: 	    {
1.255     sakharuk 1490: 	    my $displayfile=$request->uri;
                   1491: 	    $displayfile=~s/^\/[^\/]*//;
1.402     albertel 1492: 	    my %options = ();
                   1493: 	    if ($env{'environment.remote'} ne 'off') {
                   1494: 		$options{'bgcolor'}   = '#FFFFFF';
1.349     albertel 1495: 	    }
1.402     albertel 1496: 	    my $start_page = &Apache::loncommon::start_page(undef,undef,
                   1497: 							    \%options);
                   1498: 	    $result=$start_page.
1.309     albertel 1499: 		&Apache::lonxml::message_location().'<h3>'.
                   1500: 		$displayfile.
1.402     albertel 1501: 		'</h3>'.&Apache::loncommon::end_page();
1.274     albertel 1502: 	    $result=&inserteditinfo($result,$filecontents,$filetype);
1.255     sakharuk 1503: 	}
1.147     albertel 1504:     }
1.402     albertel 1505:     if ($filetype eq 'html') { &writeallows($request->uri); }
1.274     albertel 1506: 	
1.255     sakharuk 1507:     
1.309     albertel 1508:     &Apache::lonxml::add_messages(\$result);
1.255     sakharuk 1509:     $request->print($result);
                   1510:     
                   1511:     return OK;
1.253     albertel 1512: }
                   1513: 
                   1514: sub display_title {
                   1515:     my $result;
1.372     albertel 1516:     if ($env{'request.state'} eq 'construct') {
1.253     albertel 1517: 	my $title=&Apache::lonnet::gettitle();
                   1518: 	if (!defined($title) || $title eq '') {
1.372     albertel 1519: 	    $title = $env{'request.filename'};
1.253     albertel 1520: 	    $title = substr($title, rindex($title, '/') + 1);
                   1521: 	}
                   1522: 	$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
                   1523:     }
                   1524:     return $result;
1.24      sakharuk 1525: }
1.147     albertel 1526: 
1.22      albertel 1527: sub debug {
1.298     albertel 1528:     if ($Apache::lonxml::debug eq "1") {
                   1529: 	$|=1;
1.300     albertel 1530: 	my $request=$Apache::lonxml::request;
1.388     albertel 1531: 	if (!$request) {
                   1532: 	    eval { $request=Apache->request; };
                   1533: 	}
                   1534: 	if (!$request) {
                   1535: 	    eval { $request=Apache2::RequestUtil->request; };
                   1536: 	}
1.314     albertel 1537: 	$request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1.346     albertel 1538: 	#&Apache::lonnet::logthis($_[0]);
1.298     albertel 1539:     }
1.22      albertel 1540: }
1.49      albertel 1541: 
1.348     albertel 1542: sub show_error_warn_msg {
1.372     albertel 1543:     if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
                   1544: 	&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1.351     albertel 1545: 	return 1;
                   1546:     }
1.348     albertel 1547:     return (($Apache::lonxml::debug eq 1) ||
1.372     albertel 1548: 	    ($env{'request.state'} eq 'construct') ||
1.348     albertel 1549: 	    ($Apache::lonhomework::browse eq 'F'
                   1550: 	     &&
1.372     albertel 1551: 	     $env{'form.show_errors'} eq 'on'));
1.348     albertel 1552: }
                   1553: 
1.22      albertel 1554: sub error {
1.336     albertel 1555:     $errorcount++;
1.348     albertel 1556:     if ( &show_error_warn_msg() ) {
1.336     albertel 1557: 	# If printing in construction space, put the error inside <pre></pre>
                   1558: 	push(@Apache::lonxml::error_messages,
                   1559: 	     $Apache::lonxml::warnings_error_header.
                   1560: 	     "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
                   1561: 	$Apache::lonxml::warnings_error_header='';
                   1562:     } else {
                   1563: 	my $errormsg;
                   1564: 	my ($symb)=&Apache::lonnet::symbread();
                   1565: 	if ( !$symb ) {
                   1566: 	    #public or browsers
                   1567: 	    $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1.403     albertel 1568: 	}
1.413     albertel 1569: 	my $host=$Apache::lonnet::perlvar{'lonHostID'};
1.416     albertel 1570: 	my $msg = join('<br />',(@_,"The error occurred on host <tt>$host</tt>"));
1.336     albertel 1571: 	#notify author
1.403     albertel 1572: 	&Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1.336     albertel 1573: 	#notify course
1.372     albertel 1574: 	if ( $symb && $env{'request.course.id'} ) {
1.380     www      1575: 	    my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
                   1576: 	    my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1.440     albertel 1577: 	    my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1.372     albertel 1578: 	    my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1.435     raeburn  1579:             my $baseurl = &Apache::lonnet::clutter($declutter);
1.336     albertel 1580: 	    my @userlist;
                   1581: 	    foreach (keys %users) {
                   1582: 		my ($user,$domain) = split(/:/, $_);
                   1583: 		push(@userlist,"$user\@$domain");
1.380     www      1584: 		my $key=$declutter.'_'.$user.'_'.$domain;
                   1585: 		my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
                   1586: 						      [$key],
                   1587: 						      $cdom,$cnum);
                   1588: 		my $now=time;
                   1589: 		if ($now-$lastnotified{$key}>86400) {
1.434     raeburn  1590:                     my $title = &Apache::lonnet::gettitle($symb);
                   1591:                     my $sentmessage;
1.380     www      1592: 		    &Apache::lonmsg::user_normal_msg($user,$domain,
1.435     raeburn  1593: 		        "Error [$title]",$msg,'',$baseurl,'','',
1.434     raeburn  1594:                         \$sentmessage,$symb,$title,1);
1.380     www      1595: 		    &Apache::lonnet::put('nohist_xmlerrornotifications',
                   1596: 					 {$key => $now},
                   1597: 					 $cdom,$cnum);		
                   1598: 		}
1.336     albertel 1599: 	    }
1.372     albertel 1600: 	    if ($env{'request.role.adv'}) {
1.336     albertel 1601: 		$errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
                   1602: 	    } else {
                   1603: 		$errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
                   1604: 	    }
                   1605: 	}
                   1606: 	push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1.52      albertel 1607:     }
1.22      albertel 1608: }
1.49      albertel 1609: 
1.22      albertel 1610: sub warning {
1.295     albertel 1611:     $warningcount++;
1.261     albertel 1612:   
1.372     albertel 1613:     if ($env{'form.grade_target'} ne 'tex') {
1.348     albertel 1614: 	if ( &show_error_warn_msg() ) {
1.309     albertel 1615: 	    push(@Apache::lonxml::warning_messages,
                   1616: 		 $Apache::lonxml::warnings_error_header.
                   1617: 		 "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1.295     albertel 1618: 	    $Apache::lonxml::warnings_error_header='';
                   1619: 	}
                   1620:     }
1.309     albertel 1621: }
                   1622: 
                   1623: sub info {
1.372     albertel 1624:     if ($env{'form.grade_target'} ne 'tex' 
                   1625: 	&& $env{'request.state'} eq 'construct') {
1.309     albertel 1626: 	push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
                   1627:     }
                   1628: }
                   1629: 
                   1630: sub message_location {
                   1631:     return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
                   1632: }
                   1633: 
                   1634: sub add_messages {
                   1635:     my ($msg)=@_;
                   1636:     my $result=join(' ',
                   1637: 		    @Apache::lonxml::info_messages,
                   1638: 		    @Apache::lonxml::error_messages,
                   1639: 		    @Apache::lonxml::warning_messages);
                   1640:     undef(@Apache::lonxml::info_messages);
                   1641:     undef(@Apache::lonxml::error_messages);
                   1642:     undef(@Apache::lonxml::warning_messages);
                   1643:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
                   1644:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1.83      albertel 1645: }
                   1646: 
                   1647: sub get_param {
1.213     albertel 1648:     my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
                   1649:     if ( ! $context ) { $context = -1; }
                   1650:     my $args ='';
                   1651:     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1652:     if ( ! $Apache::lonxml::usestyle ) {
                   1653: 	$args=$Apache::lonxml::style_values.$args;
                   1654:     }
1.213     albertel 1655:     if ( ! $args ) { return undef; }
                   1656:     if ( $case_insensitive ) {
1.417     albertel 1657: 	if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1.213     albertel 1658: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1659:                                      $safeeval); #'
                   1660: 	} else {
                   1661: 	    return undef;
                   1662: 	}
                   1663:     } else {
1.417     albertel 1664: 	if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1.213     albertel 1665: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1666:                                      $safeeval); #'
                   1667: 	} else {
                   1668: 	    return undef;
                   1669: 	}
                   1670:     }
1.22      albertel 1671: }
                   1672: 
1.132     albertel 1673: sub get_param_var {
1.213     albertel 1674:   my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1.132     albertel 1675:   if ( ! $context ) { $context = -1; }
                   1676:   my $args ='';
                   1677:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1678:   if ( ! $Apache::lonxml::usestyle ) {
                   1679:       $args=$Apache::lonxml::style_values.$args;
                   1680:   }
1.230     albertel 1681:   &Apache::lonxml::debug("Args are $args param is $param");
1.213     albertel 1682:   if ($case_insensitive) {
1.419     albertel 1683:       if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1.213     albertel 1684: 	  return undef;
                   1685:       }
1.419     albertel 1686:   } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1.132     albertel 1687:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.230     albertel 1688:   &Apache::lonxml::debug("first run is $value");
1.341     albertel 1689:   if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1.230     albertel 1690:       &Apache::lonxml::debug("doing second");
                   1691:       my @result=&Apache::run::run("return $value",$safeeval,1);
                   1692:       if (!defined($result[0])) {
                   1693: 	  return $value
                   1694:       } else {
                   1695: 	  if (wantarray) { return @result; } else { return $result[0]; }
                   1696:       }
1.132     albertel 1697:   } else {
                   1698:     return $value;
                   1699:   }
                   1700: }
                   1701: 
1.438     albertel 1702: sub register_insert_xml {
                   1703:     my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
                   1704: 				     .'/insertlist.xml');
                   1705:     my ($tagnum,$in_help)=(0,0);
1.442     albertel 1706:     my @alltags;
1.438     albertel 1707:     my $tag;
                   1708:     while (my $token = $parser->get_token()) {
                   1709: 	if ($token->[0] eq 'S') {
                   1710: 	    my $key;
                   1711: 	    if      ($token->[1] eq 'tag') {
                   1712: 		$tag = $token->[2]{'name'};
                   1713: 		$insertlist{"$tagnum.tag"} = $tag;
                   1714: 		$insertlist{"$tag.num"}   = $tagnum;
1.442     albertel 1715: 		push(@alltags,$tag);
1.438     albertel 1716: 	    } elsif ($in_help && $token->[1] eq 'file') {
                   1717: 		$key = $tag.'.helpfile';
                   1718: 	    } elsif ($in_help && $token->[1] eq 'description') {
                   1719: 		$key = $tag.'.helpdesc';
                   1720: 	    } elsif ($token->[1] eq 'description' ||
                   1721: 		     $token->[1] eq 'color'       ||
                   1722: 		     $token->[1] eq 'show'          ) {
                   1723: 		$key = $tag.'.'.$token->[1];
                   1724: 	    } elsif ($token->[1] eq 'insert_sub') {
                   1725: 		$key = $tag.'.function';
                   1726: 	    } elsif ($token->[1] eq 'help') {
                   1727: 		$in_help=1;
                   1728: 	    } elsif ($token->[1] eq 'allow') {
1.442     albertel 1729: 		$key = $tag.'.allow';
1.438     albertel 1730: 	    }
                   1731: 	    if (defined($key)) {
                   1732: 		$insertlist{$key} = $parser->get_text();
                   1733: 		$insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
                   1734: 	    }
                   1735: 	} elsif ($token->[0] eq 'E') {
                   1736: 	    if      ($token->[1] eq 'tag') {
                   1737: 		undef($tag);
                   1738: 		$tagnum++;
                   1739: 	    } elsif ($token->[1] eq 'help') {
                   1740: 		undef($in_help);
                   1741: 	    }
                   1742: 	}
                   1743:     }
1.442     albertel 1744:     
                   1745:     # parse the allows and ignore tags set to <show>no</show>
                   1746:     foreach my $tag (@alltags) {	
                   1747: 	my $allow =  $insertlist{"$tag.allow"};
                   1748:        	foreach my $element (split(',',$allow)) {
                   1749: 	    $element =~ s/(^\s*|\s*$ )//gx;
                   1750: 	    if ($insertlist{"$element.show"} ne 'no') {
                   1751: 		push(@{ $insertlist{$tag.'.which'} },$element);
                   1752: 	    }
                   1753: 	}
                   1754:     }
1.438     albertel 1755: }
                   1756: 
                   1757: sub register_insert {
                   1758:     return &register_insert_xml(@_);
                   1759: #    &dump_insertlist('2');
                   1760: }
                   1761: 
                   1762: sub dump_insertlist {
                   1763:     my ($ext) = @_;
                   1764:     open(XML,">/tmp/insertlist.xml.$ext");
                   1765:     print XML ("<insertlist>");
                   1766:     my $i=0;
                   1767: 
                   1768:     while (exists($insertlist{"$i.tag"})) {
                   1769: 	my $tag = $insertlist{"$i.tag"};
                   1770: 	print XML ("
                   1771: \t<tag name=\"$tag\">");
                   1772: 	if (defined($insertlist{"$tag.description"})) {
                   1773: 	    print XML ("
                   1774: \t\t<description>".$insertlist{"$tag.description"}."</description>");
                   1775: 	}
                   1776: 	if (defined($insertlist{"$tag.color"})) {
                   1777: 	    print XML ("
                   1778: \t\t<color>".$insertlist{"$tag.color"}."</color>");
                   1779: 	}
                   1780: 	if (defined($insertlist{"$tag.function"})) {
                   1781: 	    print XML ("
                   1782: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
                   1783: 	}
                   1784: 	if (defined($insertlist{"$tag.show"})
                   1785: 	    && $insertlist{"$tag.show"} ne 'yes') {
                   1786: 	    print XML ("
                   1787: \t\t<show>".$insertlist{"$tag.show"}."</show>");
                   1788: 	}
                   1789: 	if (defined($insertlist{"$tag.helpfile"})) {
                   1790: 	    print XML ("
                   1791: \t\t<help>
                   1792: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
                   1793: 	    if ($insertlist{"$tag.helpdesc"} ne '') {
                   1794: 		print XML ("
                   1795: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
                   1796: 	    }
                   1797: 	    print XML ("
                   1798: \t\t</help>");
                   1799: 	}
                   1800: 	if (defined($insertlist{"$tag.which"})) {
                   1801: 	    print XML ("
                   1802: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
                   1803: 	}
                   1804: 	print XML ("
                   1805: \t</tag>");
                   1806: 	$i++;
                   1807:     }
                   1808:     print XML ("\n</insertlist>\n");
                   1809:     close(XML);
                   1810: }
                   1811: 
1.98      albertel 1812: sub description {
1.437     albertel 1813:     my ($token)=@_;
                   1814:     my $tag = &get_tag($token);
                   1815:     return $insertlist{$tag.'.description'};
1.268     bowersj2 1816: }
                   1817: 
                   1818: # Returns a list containing the help file, and the description
                   1819: sub helpinfo {
1.437     albertel 1820:     my ($token)=@_;
                   1821:     my $tag = &get_tag($token);
                   1822:     return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
                   1823: }
                   1824: 
                   1825: sub get_tag {
                   1826:     my ($token)=@_;
                   1827:     my $tagnum;
                   1828:     my $tag=$token->[1];
                   1829:     foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
                   1830: 	my $testtag = $namespace.'::'.$tag;
                   1831: 	$tagnum = $insertlist{"$testtag.num"};
                   1832: 	last if (defined($tagnum));
                   1833:     }
                   1834:     if (!defined($tagnum)) {
                   1835: 	$tagnum = $Apache::lonxml::insertlist{"$tag.num"};
                   1836:     }
                   1837:     return $insertlist{"$tagnum.tag"};
1.98      albertel 1838: }
1.123     albertel 1839: 
1.1       sakharuk 1840: 1;
                   1841: __END__
1.68      www      1842: 
                   1843: 

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