Annotation of loncom/xml/lonxml.pm, revision 1.288

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.288   ! sakharuk    4: # $Id: lonxml.pm,v 1.287 2003/10/24 21:31:05 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: #
1.3       sakharuk   39: # last modified 06/26/00 by Alexander Sakharuk
1.33      www        40: # 11/6 Gerd Kortemeyer
1.45      www        41: # 6/1/1 Gerd Kortemeyer
1.56      albertel   42: # 2/21,3/13 Guy
1.68      www        43: # 3/29,5/4 Gerd Kortemeyer
1.78      www        44: # 5/26 Gerd Kortemeyer
1.80      harris41   45: # 5/27 H. K. Ng
1.89      www        46: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
1.93      ng         47: # 6/12,6/13 H. K. Ng
1.95      www        48: # 6/16 Gerd Kortemeyer
1.104     ng         49: # 7/27 H. K. Ng
1.127     www        50: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
1.130     www        51: # Guy Albertelli
                     52: # 9/26 Gerd Kortemeyer
1.143     www        53: # Dec Guy Albertelli
                     54: # YEAR=2002
                     55: # 1/1 Gerd Kortemeyer
1.145     www        56: # 1/2 Matthew Hall
                     57: # 1/3 Gerd Kortemeyer
1.143     www        58: #
1.2       sakharuk   59: 
1.4       albertel   60: package Apache::lonxml; 
1.33      www        61: use vars 
1.205     www        62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
1.1       sakharuk   63: use strict;
1.167     albertel   64: use HTML::LCParser();
1.161     albertel   65: use HTML::TreeBuilder();
                     66: use HTML::Entities();
                     67: use Safe();
                     68: use Safe::Hole();
                     69: use Math::Cephes();
                     70: use Math::Random();
                     71: use Opcode();
1.271     www        72: use POSIX qw(strftime);
1.72      albertel   73: 
1.266     bowersj2   74: 
1.72      albertel   75: sub register {
1.141     albertel   76:   my ($space,@taglist) = @_;
                     77:   foreach my $temptag (@taglist) {
                     78:     push(@{ $Apache::lonxml::alltags{$temptag} },$space);
1.72      albertel   79:   }
                     80: }
                     81: 
1.141     albertel   82: sub deregister {
                     83:   my ($space,@taglist) = @_;
                     84:   foreach my $temptag (@taglist) {
                     85:     my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
                     86:     if ($tempspace eq $space) {
                     87:       pop(@{ $Apache::lonxml::alltags{$temptag} });
                     88:     }
                     89:   }
1.142     albertel   90:   #&printalltags();
1.141     albertel   91: }
                     92: 
1.46      www        93: use Apache::Constants qw(:common);
1.161     albertel   94: use Apache::lontexconvert();
                     95: use Apache::style();
                     96: use Apache::run();
                     97: use Apache::londefdef();
                     98: use Apache::scripttag();
1.285     www        99: use Apache::languagetags();
1.161     albertel  100: use Apache::edit();
1.266     bowersj2  101: use Apache::inputtags();
                    102: use Apache::outputtags();
1.161     albertel  103: use Apache::lonnet();
                    104: use Apache::File();
                    105: use Apache::loncommon();
1.198     www       106: use Apache::lonfeedback();
1.200     www       107: use Apache::lonmsg();
1.217     matthew   108: use Apache::loncacc();
1.280     www       109: use Apache::lonlocal;
1.79      www       110: 
1.72      albertel  111: #==================================================   Main subroutine: xmlparse  
                    112: #debugging control, to turn on debugging modify the correct handler
                    113: $Apache::lonxml::debug=0;
1.206     albertel  114: 
                    115: # keeps count of the number of warnings and errors generated in a parse
                    116: $warningcount=0;
                    117: $errorcount=0;
1.72      albertel  118: 
                    119: #path to the directory containing the file currently being processed
                    120: @pwd=();
                    121: 
                    122: #these two are used for capturing a subset of the output for later processing,
                    123: #don't touch them directly use &startredirection and &endredirection
                    124: @outputstack = ();
                    125: $redirection = 0;
                    126: 
                    127: #controls wheter the <import> tag actually does
                    128: $import = 1;
                    129: @extlinks=();
                    130: 
                    131: # meta mode is a bit weird only some output is to be turned off
                    132: #<output> tag turns metamode off (defined in londefdef.pm)
                    133: $metamode = 0;
                    134: 
                    135: # turns on and of run::evaluate actually derefencing var refs
                    136: $evaluate = 1;
1.7       albertel  137: 
1.74      albertel  138: # data structure for eidt mode, determines what tags can go into what other tags
                    139: %insertlist=();
1.68      www       140: 
1.99      albertel  141: # stores the list of active tag namespaces
1.76      albertel  142: @namespace=();
                    143: 
1.169     albertel  144: # if 0 all high ASCII characters will be encoded into HTML Entities
                    145: $prevent_entity_encode=0;
                    146: 
1.99      albertel  147: # has the dynamic menu been updated to know about this resource
                    148: $Apache::lonxml::registered=0;
                    149: 
1.172     albertel  150: # a pointer the the Apache request object
                    151: $Apache::lonxml::request='';
                    152: 
1.216     sakharuk  153: # a problem number counter, and check on ether it is used
1.237     sakharuk  154: $Apache::lonxml::counter=1;
1.204     albertel  155: $Apache::lonxml::counter_changed=0;
                    156: 
1.212     albertel  157: #internal check on whether to look at style defs
                    158: $Apache::lonxml::usestyle=1;
1.260     albertel  159: 
                    160: #locations used to store the parameter string for style substitutions
                    161: $Apache::lonxml::style_values='';
                    162: $Apache::lonxml::style_end_values='';
1.212     albertel  163: 
1.281     albertel  164: #array of ssi calls that need to occur after we are done parsing
                    165: @Apache::lonxml::ssi_info=();
                    166: 
1.282     albertel  167: #should we do the postag variable interpolation
                    168: $Apache::lonxml::post_evaluate=1;
                    169: 
1.68      www       170: sub xmlbegin {
                    171:   my $output='';
                    172:   if ($ENV{'browser.mathml'}) {
                    173:       $output='<?xml version="1.0"?>'
                    174:             .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
                    175:             .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
                    176:             .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
                    177:             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
                    178: 		.'xmlns="http://www.w3.org/TR/REC-html40">';
                    179:   } else {
                    180:       $output='<html>';
                    181:   }
                    182:   return $output;
                    183: }
                    184: 
                    185: sub xmlend {
1.278     www       186:     my $mode='xml';
                    187:     my $status='OPEN';
                    188:     if ($Apache::lonhomework::parsing_a_problem) {
                    189: 	$mode='problem';
                    190: 	$status=$Apache::inputtags::status[-1]; 
                    191:     }
1.277     www       192:     return &Apache::lonfeedback::list_discussion().'</html>';
1.119     www       193: }
                    194: 
                    195: sub tokeninputfield {
1.120     www       196:     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
                    197:     $defhost=~tr/a-z/A-Z/;
1.119     www       198:     return (<<ENDINPUTFIELD)
1.226     albertel  199: <script type="text/javascript">
1.120     www       200:     function updatetoken() {
                    201: 	var comp=new Array;
                    202:         var barcode=unescape(document.tokeninput.barcode.value);
                    203:         comp=barcode.split('*');
                    204:         if (typeof(comp[0])!="undefined") {
                    205: 	    document.tokeninput.codeone.value=comp[0];
                    206: 	}
                    207:         if (typeof(comp[1])!="undefined") {
                    208: 	    document.tokeninput.codetwo.value=comp[1];
                    209: 	}
                    210:         if (typeof(comp[2])!="undefined") {
                    211:             comp[2]=comp[2].toUpperCase();
                    212: 	    document.tokeninput.codethree.value=comp[2];
                    213: 	}
                    214:         document.tokeninput.barcode.value='';
                    215:     }  
                    216: </script>
                    217: <form method="post" name="tokeninput">
1.119     www       218: <table border="2" bgcolor="#FFFFBB">
                    219: <tr><th>DocID Checkin</th></tr>
                    220: <tr><td>
                    221: <table>
                    222: <tr>
                    223: <td>Scan in Barcode</td>
1.120     www       224: <td><input type="text" size="22" name="barcode" 
                    225: onChange="updatetoken()"/></td>
1.119     www       226: </tr>
                    227: <tr><td><i>or</i> Type in DocID</td>
                    228: <td>
                    229: <input type="text" size="5" name="codeone" />
1.120     www       230: <b><font size="+2">*</font></b>
1.119     www       231: <input type="text" size="5" name="codetwo" />
1.120     www       232: <b><font size="+2">*</font></b>
                    233: <input type="text" size="10" name="codethree" value="$defhost" 
                    234: onChange="this.value=this.value.toUpperCase()" />
1.119     www       235: </td></tr>
                    236: </table>
                    237: </td></tr>
                    238: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
                    239: </table>
                    240: </form>
                    241: ENDINPUTFIELD
1.112     www       242: }
                    243: 
1.116     www       244: sub maketoken {
1.118     www       245:     my ($symb,$tuname,$tudom,$tcrsid)=@_;
1.112     www       246:     unless ($symb) {
                    247: 	$symb=&Apache::lonnet::symbread();
                    248:     }
                    249:     unless ($tuname) {
                    250: 	$tuname=$ENV{'user.name'};
                    251:         $tudom=$ENV{'user.domain'};
                    252:         $tcrsid=$ENV{'request.course.id'};
                    253:     }
1.116     www       254: 
1.118     www       255:     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
                    256: }
                    257: 
                    258: sub printtokenheader {
1.133     albertel  259:     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
1.116     www       260:     unless ($token) { return ''; }
1.118     www       261: 
1.133     albertel  262:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    263:     unless ($tsymb) {
                    264: 	$tsymb=$symb;
1.118     www       265:     }
                    266:     unless ($tuname) {
1.133     albertel  267: 	$tuname=$name;
                    268:         $tudom=$domain;
                    269:         $tcrsid=$courseid;
1.118     www       270:     }
1.114     www       271: 
                    272:     my %reply=&Apache::lonnet::get('environment',
                    273:               ['firstname','middlename','lastname','generation'],
                    274:               $tudom,$tuname);
                    275:     my $plainname=$reply{'firstname'}.' '. 
                    276:                   $reply{'middlename'}.' '.
                    277:                   $reply{'lastname'}.' '.
                    278: 		  $reply{'generation'};
                    279: 
1.112     www       280:     if ($target eq 'web') {
1.145     www       281:         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
1.115     www       282: 	return 
1.221     albertel  283:  '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
1.284     www       284:                &mt('Checked out for').' '.$plainname.
                    285:                '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
                    286: 	       '<br />'.&mt('ID').': '.$idhash{$tuname}.
                    287: 	       '<br />'.&mt('CourseID').': '.$tcrsid.
                    288: 	       '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
                    289:                '<br />'.&mt('DocID').': '.$token.
                    290:                '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
1.112     www       291:     } else {
1.121     albertel  292:         return $token;
1.112     www       293:     }
1.68      www       294: }
                    295: 
1.70      www       296: sub fontsettings() {
                    297:     my $headerstring='';
                    298:     if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 
1.248     albertel  299: 	$headerstring.=
                    300: 	    '<meta Content-Type="text/html; charset=x-mac-roman">';
1.263     albertel  301:     } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
1.248     albertel  302: 	$headerstring.=
                    303: 	    '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
1.70      www       304:     }
                    305:     return $headerstring;
1.68      www       306: }
                    307: 
1.48      albertel  308: sub printalltags {
                    309:   my $temp;
                    310:   foreach $temp (sort keys %Apache::lonxml::alltags) {
1.141     albertel  311:     &Apache::lonxml::debug("$temp -- ".
                    312: 		  join(',',@{ $Apache::lonxml::alltags{$temp} }));
1.48      albertel  313:   }
                    314: }
1.31      sakharuk  315: 
1.3       sakharuk  316: sub xmlparse {
1.172     albertel  317:  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96      albertel  318: 
1.172     albertel  319:  &setup_globals($request,$target);
1.232     albertel  320:  &Apache::inputtags::initialize_inputtags();
                    321:  &Apache::outputtags::initialize_outputtags();
                    322:  &Apache::edit::initialize_edit();
1.287     albertel  323:  &Apache::londefdef::initialize_londefdef();
1.244     albertel  324: 
1.178     www       325: #
                    326: # do we have a course style file?
                    327: #
                    328: 
1.208     albertel  329:  if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
1.178     www       330:      my $bodytext=
                    331: 	 $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
                    332:      if ($bodytext) {
                    333:        my $location=&Apache::lonnet::filelocation('',$bodytext);
                    334:        my $styletext=&Apache::lonnet::getfile($location);
                    335:        if ($styletext ne '-1') {
                    336:           %style_for_target = (%style_for_target,
                    337:                           &Apache::style::styleparser($target,$styletext));
                    338:        }
                    339:     }
                    340:  }
1.255     sakharuk  341: #&printalltags();
1.16      albertel  342:  my @pars = ();
1.23      albertel  343:  my $pwd=$ENV{'request.filename'};
                    344:  $pwd =~ s:/[^/]*$::;
                    345:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  346: 
1.3       sakharuk  347:  my $safeeval = new Safe;
1.40      albertel  348:  my $safehole = new Safe::Hole;
1.82      ng        349:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  350: #-------------------- Redefinition of the target in the case of compound target
                    351: 
                    352:  ($target, my @tenta) = split('&&',$target);
                    353: 
1.150     albertel  354:  my @stack = ();
1.3       sakharuk  355:  my @parstack = ();
1.17      albertel  356:  &initdepth;
1.67      www       357: 
1.101     albertel  358:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
                    359: 				   $safeeval,\%style_for_target);
1.255     sakharuk  360: 
1.125     www       361:  if ($ENV{'request.uri'}) {
                    362:     &writeallows($ENV{'request.uri'});
                    363:  }
1.281     albertel  364:  &do_registered_ssi();
1.204     albertel  365:  if ($Apache::lonxml::counter_changed) { &store_counter() }
1.3       sakharuk  366:  return $finaloutput;
1.106     www       367: }
                    368: 
                    369: sub htmlclean {
1.107     www       370:     my ($raw,$full)=@_;
1.106     www       371: 
                    372:     my $tree = HTML::TreeBuilder->new;
                    373:     $tree->ignore_unknown(0);
1.140     albertel  374: 
1.106     www       375:     $tree->parse($raw);
                    376: 
1.107     www       377:     my $output= $tree->as_HTML(undef,' ');
1.140     albertel  378: 
1.161     albertel  379:     $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
1.111     www       380:     $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
1.107     www       381:     unless ($full) {
                    382:        $output=~s/\<[\/]*(body|head|html)\>//gis;
                    383:     }
1.106     www       384: 
                    385:     $tree = $tree->delete;
                    386: 
                    387:     return $output;
1.15      albertel  388: }
                    389: 
1.191     albertel  390: sub latex_special_symbols {
1.272     albertel  391:     my ($string,$where)=@_;
1.235     sakharuk  392:     if ($where eq 'header') {
1.272     albertel  393: 	$string =~ s/(\\|_|\^)/ /g;
                    394: 	$string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
1.273     sakharuk  395: 	$string =~ s/_/ /g;
1.229     sakharuk  396:     } else {
1.272     albertel  397: 	$string=~s/\\ /\\char92 /g;
1.288   ! sakharuk  398: 	$string=~s/\^/\\\^ /g;
1.272     albertel  399: 	$string=~s/\~/\\char126 /g;
                    400: 	$string=~s/(&[^A-Za-z\#])/\\$1/g;
                    401: 	$string=~s/([^&])\#/$1\\#/g;
                    402: 	$string=~s/(\$|_|{|})/\\$1/g;
                    403: 	$string=~s/\\char92 /\\texttt{\\char92}/g;
                    404: 	$string=~s/(>|<)/\$$1\$/g; #more or less
                    405: 	if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
                    406: 	if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
                    407: 	if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
1.229     sakharuk  408:     }
1.272     albertel  409:     return $string;
1.188     sakharuk  410: }
                    411: 
1.101     albertel  412: sub inner_xmlparse {
                    413:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
                    414:   my $finaloutput = '';
                    415:   my $result;
                    416:   my $token;
1.258     albertel  417:   my $dontpop=0;
1.101     albertel  418:   while ( $#$pars > -1 ) {
                    419:     while ($token = $$pars['-1']->get_token) {
1.261     albertel  420:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
1.101     albertel  421: 	if ($metamode<1) {
1.190     albertel  422: 	    my $text=$token->[1];
1.193     albertel  423: 	    if ($token->[0] eq 'C' && $target eq 'tex') {
1.239     sakharuk  424: 		$text = '';
                    425: #		$text = '%'.$text."\n";
1.182     sakharuk  426: 	    }
1.190     albertel  427: 	    $result.=$text;
1.101     albertel  428: 	}
1.261     albertel  429:       } elsif (($token->[0] eq 'D')) {
                    430: 	if ($metamode<1 && $target eq 'web') {
                    431: 	    my $text=$token->[1];
                    432: 	    $result.=$text;
                    433: 	}
1.101     albertel  434:       } elsif ($token->[0] eq 'PI') {
1.261     albertel  435: 	if ($metamode<1 && $target eq 'web') {
1.101     albertel  436: 	  $result=$token->[2];
                    437: 	}
                    438:       } elsif ($token->[0] eq 'S') {
1.140     albertel  439: 	# add tag to stack
1.101     albertel  440: 	push (@$stack,$token->[1]);
                    441: 	# add parameters list to another stack
                    442: 	push (@$parstack,&parstring($token));
1.140     albertel  443: 	&increasedepth($token);
1.212     albertel  444: 	if ($Apache::lonxml::usestyle &&
                    445: 	    exists($$style_for_target{$token->[1]})) {
                    446: 	    $Apache::lonxml::usestyle=0;
                    447: 	    my $string=$$style_for_target{$token->[1]}.
                    448: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    449: 	    &Apache::lonxml::newparser($pars,\$string);
1.257     albertel  450: 	    $Apache::lonxml::style_values=$$parstack[-1];
1.259     albertel  451: 	    $Apache::lonxml::style_end_values=$$parstack[-1];
1.101     albertel  452: 	} else {
                    453: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    454: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  455: 	}
1.101     albertel  456:       } elsif ($token->[0] eq 'E') {
1.212     albertel  457: 	if ($Apache::lonxml::usestyle &&
                    458: 	    exists($$style_for_target{'/'."$token->[1]"})) {
                    459: 	    $Apache::lonxml::usestyle=0;
                    460: 	    my $string=$$style_for_target{'/'.$token->[1]}.
1.258     albertel  461: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
1.212     albertel  462: 	    &Apache::lonxml::newparser($pars,\$string);
1.259     albertel  463: 	    $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
                    464: 	    $Apache::lonxml::style_end_values='';
1.258     albertel  465: 	    $dontpop=1;
1.101     albertel  466: 	} else {
1.258     albertel  467: 	    #clear out any tags that didn't end
                    468: 	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
                    469: 		my $lasttag=$$stack[-1];
                    470: 		if ($token->[1] =~ /^$lasttag$/i) {
                    471: 		    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' as end tag to &lt;'.$$stack[-1].'&gt;');
                    472: 		    last;
                    473: 		} else {
                    474: 		    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' when looking for &lt;/'.$$stack[-1].'&gt; in file');
                    475: 		    &end_tag($stack,$parstack,$token);
                    476: 		}
                    477: 	    }
                    478: 	    $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    479: 			       $parstack, $pars,$safeeval, $style_for_target);
1.101     albertel  480: 	}
                    481:       } else {
                    482: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    483:       }
                    484:       #evaluate variable refs in result
1.282     albertel  485:       if ($Apache::lonxml::post_evaluate &&$result ne "") {
1.257     albertel  486: 	  my $extras;
                    487: 	  if (!$Apache::lonxml::usestyle) {
                    488: 	      $extras=$Apache::lonxml::style_values;
                    489: 	  }
1.101     albertel  490: 	if ( $#$parstack > -1 ) {
1.257     albertel  491: 	  $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
1.101     albertel  492: 	} else {
1.257     albertel  493: 	  $result= &Apache::run::evaluate($result,$safeeval,$extras);
1.101     albertel  494: 	}
1.163     albertel  495:       }
1.282     albertel  496:       $Apache::lonxml::post_evaluate=1;
                    497: 
1.190     albertel  498:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.249     albertel  499: 	  #Style file definitions should be correct
1.250     albertel  500: 	  if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
1.272     albertel  501: 	      $result=&latex_special_symbols($result);
1.249     albertel  502: 	  }
1.190     albertel  503:       }
                    504: 
1.169     albertel  505:       # Encode any high ASCII characters
1.279     albertel  506: #      if (!$Apache::lonxml::prevent_entity_encode) {
                    507: #	$result=&HTML::Entities::encode($result,"\200-\377");
                    508: #      }
1.169     albertel  509:       if ($Apache::lonxml::redirection) {
                    510: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    511:       } else {
                    512: 	$finaloutput.=$result;
                    513:       }
                    514:       $result = '';
                    515: 
1.258     albertel  516:       if ($token->[0] eq 'E' && !$dontpop) {
1.101     albertel  517: 	&end_tag($stack,$parstack,$token);
                    518:       }
1.258     albertel  519:       $dontpop=0;
1.224     albertel  520:     }	
1.212     albertel  521:     if ($#$pars > -1) {
                    522: 	pop @$pars;
                    523: 	pop @Apache::lonxml::pwd;
                    524:     }
1.101     albertel  525:   }
                    526: 
                    527:   # if ($target eq 'meta') {
                    528:   #   $finaloutput.=&endredirection;
                    529:   # }
                    530: 
1.169     albertel  531: 
1.101     albertel  532:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    533:     $finaloutput=&afterburn($finaloutput);
1.216     sakharuk  534:   }	    
1.101     albertel  535:   return $finaloutput;
                    536: }
1.67      www       537: 
1.7       albertel  538: sub callsub {
1.84      albertel  539:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  540:   my $currentstring='';
1.72      albertel  541:   my $nodefault;
1.7       albertel  542:   {
1.59      albertel  543:     my $sub1;
1.7       albertel  544:     no strict 'refs';
1.68      www       545:     my $tag=$token->[1];
1.236     www       546: # get utterly rid of extended html tags
                    547:     if ($tag=~/^x\-/i) { return ''; }
1.141     albertel  548:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       549:     if (!$space) {
1.141     albertel  550:      	$tag=~tr/A-Z/a-z/;
1.68      www       551: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  552: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       553:     }
1.97      albertel  554: 
                    555:     my $deleted=0;
                    556:     $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
                    557:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    558:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    559: 					     $parstack,$parser,$safeeval,
                    560: 					     $style);
                    561:     }
                    562:     if (!$deleted) {
                    563:       if ($space) {
1.220     albertel  564: 	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  565: 	$sub1="$space\:\:$sub";
                    566: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    567: 					     $parstack,$parser,$safeeval,
                    568: 					     $style);
                    569:       } else {
1.220     albertel  570: 	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
1.97      albertel  571: 	if ($metamode <1) {
                    572: 	  if (defined($token->[4]) && ($metamode < 1)) {
                    573: 	    $currentstring = $token->[4];
                    574: 	  } else {
                    575: 	    $currentstring = $token->[2];
                    576: 	  }
1.62      sakharuk  577: 	}
1.7       albertel  578:       }
1.97      albertel  579:       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
                    580:       if ($currentstring eq '' && $nodefault eq '') {
                    581: 	if ($target eq 'edit') {
1.220     albertel  582: 	  #&Apache::lonxml::debug("doing default edit for $token->[1]");
1.97      albertel  583: 	  if ($token->[0] eq 'S') {
                    584: 	    $currentstring = &Apache::edit::tag_start($target,$token);
                    585: 	  } elsif ($token->[0] eq 'E') {
                    586: 	    $currentstring = &Apache::edit::tag_end($target,$token);
                    587: 	  }
                    588: 	} elsif ($target eq 'modified') {
                    589: 	  if ($token->[0] eq 'S') {
                    590: 	    $currentstring = $token->[4];
                    591: 	    $currentstring.=&Apache::edit::handle_insert();
1.210     www       592: 	  } elsif ($token->[0] eq 'E') {
                    593: 	    $currentstring = $token->[2];
                    594:             $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
1.97      albertel  595: 	  } else {
                    596: 	    $currentstring = $token->[2];
                    597: 	  }
1.72      albertel  598: 	}
                    599:       }
1.7       albertel  600:     }
                    601:     use strict 'refs';
                    602:   }
                    603:   return $currentstring;
1.82      ng        604: }
                    605: 
1.96      albertel  606: sub setup_globals {
1.172     albertel  607:   my ($request,$target)=@_;
                    608:   $Apache::lonxml::request=$request;
1.99      albertel  609:   $Apache::lonxml::registered = 0;
1.205     www       610:   $errorcount=0;
                    611:   $warningcount=0;
1.207     albertel  612:   $Apache::lonxml::default_homework_loaded=0;
1.212     albertel  613:   $Apache::lonxml::usestyle=1;
1.204     albertel  614:   &init_counter();
1.101     albertel  615:   @Apache::lonxml::pwd=();
1.124     albertel  616:   @Apache::lonxml::extlinks=();
1.281     albertel  617:   @Apache::lonxml::ssi_info=();
1.282     albertel  618:   $Apache::lonxml::post_evaluate=1;
1.96      albertel  619:   if ($target eq 'meta') {
                    620:     $Apache::lonxml::redirection = 0;
                    621:     $Apache::lonxml::metamode = 1;
                    622:     $Apache::lonxml::evaluate = 1;
                    623:     $Apache::lonxml::import = 0;
1.129     albertel  624:   } elsif ($target eq 'answer') {
                    625:     $Apache::lonxml::redirection = 0;
                    626:     $Apache::lonxml::metamode = 1;
                    627:     $Apache::lonxml::evaluate = 1;
                    628:     $Apache::lonxml::import = 1;
1.96      albertel  629:   } elsif ($target eq 'grade') {
                    630:     &startredirection;
                    631:     $Apache::lonxml::metamode = 0;
                    632:     $Apache::lonxml::evaluate = 1;
                    633:     $Apache::lonxml::import = 1;
                    634:   } elsif ($target eq 'modified') {
                    635:     $Apache::lonxml::redirection = 0;
                    636:     $Apache::lonxml::metamode = 0;
                    637:     $Apache::lonxml::evaluate = 0;
                    638:     $Apache::lonxml::import = 0;
                    639:   } elsif ($target eq 'edit') {
                    640:     $Apache::lonxml::redirection = 0;
                    641:     $Apache::lonxml::metamode = 0;
                    642:     $Apache::lonxml::evaluate = 0;
                    643:     $Apache::lonxml::import = 0;
1.163     albertel  644:   } elsif ($target eq 'analyze') {
                    645:     $Apache::lonxml::redirection = 0;
                    646:     $Apache::lonxml::metamode = 0;
                    647:     $Apache::lonxml::evaluate = 1;
                    648:     $Apache::lonxml::import = 1;
1.96      albertel  649:   } else {
                    650:     $Apache::lonxml::redirection = 0;
                    651:     $Apache::lonxml::metamode = 0;
                    652:     $Apache::lonxml::evaluate = 1;
                    653:     $Apache::lonxml::import = 1;
                    654:   }
                    655: }
                    656: 
1.82      ng        657: sub init_safespace {
                    658:   my ($target,$safeeval,$safehole,$safeinit) = @_;
                    659:   $safeeval->permit("entereval");
                    660:   $safeeval->permit(":base_math");
                    661:   $safeeval->permit("sort");
1.286     albertel  662:   $safeeval->permit("time");
1.82      ng        663:   $safeeval->deny(":base_io");
1.102     albertel  664:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.251     albertel  665:   $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
1.82      ng        666:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
                    667:   
                    668:   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
                    669:   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
                    670:   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
                    671:   $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
                    672:   $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
                    673:   $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
                    674:   $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
                    675:   $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
                    676:   $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
                    677:   $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
                    678:   $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
                    679:   $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
                    680:   $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
                    681:   $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
                    682:   $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
                    683:   $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
                    684:   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
                    685:   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
                    686:   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.215     albertel  687:   
                    688:   $safehole->wrap(\&Math::Cephes::bdtr  ,$safeeval,'&bdtr'  );
                    689:   $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
                    690:   $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
                    691:   $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
                    692:   $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
                    693:   $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
                    694:   $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
                    695:   $safehole->wrap(\&Math::Cephes::fdtr  ,$safeeval,'&fdtr'  );
                    696:   $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
                    697:   $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
                    698:   $safehole->wrap(\&Math::Cephes::gdtr  ,$safeeval,'&gdtr'  );
                    699:   $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
                    700:   $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
                    701:   $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
                    702:   $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
                    703:   $safehole->wrap(\&Math::Cephes::ndtr  ,$safeeval,'&ndtr'  );
                    704:   $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
                    705:   $safehole->wrap(\&Math::Cephes::pdtr  ,$safeeval,'&pdtr'  );
                    706:   $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
                    707:   $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
                    708:   $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
                    709:   $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
                    710: 
                    711: #  $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
                    712: #  $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
                    713: #  $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
                    714: #  $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
                    715: #  $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
                    716: #  $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
                    717: 
1.91      ng        718:   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
                    719:   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
                    720:   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
                    721:   $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
                    722:   $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
                    723:   $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
                    724:   $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
                    725:   $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
                    726:   $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
                    727:   $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
                    728:   $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93      ng        729:   $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91      ng        730:   $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
                    731:   $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
                    732:   $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
                    733:   $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
                    734:   $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
                    735:   $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
                    736:   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
                    737:   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
                    738:   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
                    739: 
1.82      ng        740: #need to inspect this class of ops
                    741: # $safeeval->deny(":base_orig");
1.91      ng        742:   $safeinit .= ';$external::target="'.$target.'";';
1.121     albertel  743:   my $rndseed;
1.123     albertel  744:   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    745:   $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
1.121     albertel  746:   $safeinit .= ';$external::randomseed='.$rndseed.';';
1.249     albertel  747:   &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.82      ng        748:   &Apache::run::run($safeinit,$safeeval);
1.207     albertel  749: }
                    750: 
                    751: sub default_homework_load {
                    752:     my ($safeeval)=@_;
                    753:     &Apache::lonxml::debug('Loading default_homework');
                    754:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1.241     albertel  755:     if ($default eq -1) {
1.207     albertel  756: 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
                    757:     } else {
                    758: 	&Apache::run::run($default,$safeeval);
                    759: 	$Apache::lonxml::default_homework_loaded=1;
                    760:     }
1.17      albertel  761: }
                    762: 
1.55      albertel  763: sub startredirection {
                    764:   $Apache::lonxml::redirection++;
                    765:   push (@Apache::lonxml::outputstack, '');
                    766: }
                    767: 
                    768: sub endredirection {
                    769:   if (!$Apache::lonxml::redirection) {
1.72      albertel  770:     &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1.55      albertel  771:     return '';
                    772:   }
                    773:   $Apache::lonxml::redirection--;
                    774:   pop @Apache::lonxml::outputstack;
1.97      albertel  775: }
                    776: 
                    777: sub end_tag {
                    778:   my ($tagstack,$parstack,$token)=@_;
                    779:   pop(@$tagstack);
                    780:   pop(@$parstack);
                    781:   &decreasedepth($token);
1.55      albertel  782: }
                    783: 
1.17      albertel  784: sub initdepth {
                    785:   @Apache::lonxml::depthcounter=();
                    786:   $Apache::lonxml::depth=-1;
                    787:   $Apache::lonxml::olddepth=-1;
                    788: }
                    789: 
                    790: sub increasedepth {
1.19      albertel  791:   my ($token) = @_;
1.17      albertel  792:   $Apache::lonxml::depth++;
                    793:   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
                    794:   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
                    795:     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
                    796:   }
1.42      albertel  797:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  798:   &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54      albertel  799: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  800: }
                    801: 
                    802: sub decreasedepth {
1.19      albertel  803:   my ($token) = @_;
1.17      albertel  804:   $Apache::lonxml::depth--;
1.36      albertel  805:   if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
                    806:     $#Apache::lonxml::depthcounter--;
                    807:     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
                    808:   }
1.43      albertel  809:   if (  $Apache::lonxml::depth < -1) {
1.280     www       810:     &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1.43      albertel  811:     $Apache::lonxml::depth='-1';
                    812:   }
1.42      albertel  813:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  814:   &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54      albertel  815: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  816: }
1.19      albertel  817: 
1.180     albertel  818: sub get_all_text_unbalanced {
1.190     albertel  819: #there is a copy of this in lonpublisher.pm
1.180     albertel  820:  my($tag,$pars)= @_;
                    821:  my $token;
                    822:  my $result='';
                    823:  $tag='<'.$tag.'>';
                    824:  while ($token = $$pars[-1]->get_token) {
                    825:    if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    826:      $result.=$token->[1];
                    827:    } elsif ($token->[0] eq 'PI') {
                    828:      $result.=$token->[2];
                    829:    } elsif ($token->[0] eq 'S') {
                    830:      $result.=$token->[4];
                    831:    } elsif ($token->[0] eq 'E')  {
                    832:      $result.=$token->[2];
                    833:    }
1.211     albertel  834:    if ($result =~ /(.*)\Q$tag\E(.*)/s) {
1.180     albertel  835:      &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    836:      &Apache::lonxml::debug('Result is :'.$1);
                    837:      $result=$1;
                    838:      my $redo=$tag.$2;
                    839:      &Apache::lonxml::newparser($pars,\$redo);
                    840:      last;
                    841:    }
                    842:  }
                    843:  return $result
1.204     albertel  844: }
                    845: 
                    846: sub increment_counter {
1.247     albertel  847:     my ($increment) = @_;
1.288   ! sakharuk  848:     if ($ENV{'form.freeze_counter'} ne 'yes') {
        !           849: 	if (defined($increment) && $increment gt 0) {
        !           850: 	    $Apache::lonxml::counter+=$increment;
        !           851: 	} else {
        !           852: 	    $Apache::lonxml::counter++;
        !           853: 	}
        !           854: 	$Apache::lonxml::counter_changed=1;
1.247     albertel  855:     }
1.204     albertel  856: }
                    857: 
                    858: sub init_counter {
                    859:     if (defined($ENV{'form.counter'})) {
                    860: 	$Apache::lonxml::counter=$ENV{'form.counter'};
1.247     albertel  861: 	$Apache::lonxml::counter_changed=0;
1.237     sakharuk  862:     } else {
1.204     albertel  863: 	$Apache::lonxml::counter=1;
1.247     albertel  864: 	$Apache::lonxml::counter_changed=1;
1.204     albertel  865:     }
                    866: }
                    867: 
                    868: sub store_counter {
                    869:     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
                    870:     return '';
1.180     albertel  871: }
                    872: 
1.19      albertel  873: sub get_all_text {
1.270     albertel  874:     my($tag,$pars,$style)= @_;
                    875:     my $gotfullstack=1;
                    876:     if (ref($pars) ne 'ARRAY') {
                    877: 	$gotfullstack=0;
                    878: 	$pars=[$pars];
                    879:     }
                    880:     if (ref($style) ne 'HASH') {
                    881: 	$style={};
                    882:     }
                    883:     my $depth=0;
                    884:     my $token;
                    885:     my $result='';
                    886:     if ( $tag =~ m:^/: ) { 
                    887: 	my $tag=substr($tag,1); 
                    888: 	#&Apache::lonxml::debug("have:$tag:");
                    889: 	my $top_empty=0;
                    890: 	while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
                    891: 	    while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
                    892: 		#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
                    893: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    894: 		    $result.=$token->[1];
                    895: 		} elsif ($token->[0] eq 'PI') {
                    896: 		    $result.=$token->[2];
                    897: 		} elsif ($token->[0] eq 'S') {
                    898: 		    if ($token->[1] =~ /^$tag$/i) { $depth++; }
                    899: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
                    900: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
                    901: 		    $result.=$token->[4];
                    902: 		} elsif ($token->[0] eq 'E')  {
                    903: 		    if ( $token->[1] =~ /^$tag$/i) { $depth--; }
                    904: 		    #skip sending back the last end tag
1.283     albertel  905: 		    if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1.270     albertel  906: 			my $string=
                    907: 			    '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
                    908: 				$$style{'/'.$token->[1]}.
                    909: 				    $token->[2].
                    910: 					'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    911: 			&Apache::lonxml::newparser($pars,\$string);
                    912: 			#&Apache::lonxml::debug("reParsing $string");
                    913: 			next;
                    914: 		    }
                    915: 		    if ($depth > -1) {
                    916: 			$result.=$token->[2];
                    917: 		    } else {
                    918: 			$$pars[-1]->unget_token($token);
                    919: 		    }
                    920: 		}
                    921: 	    }
                    922: 	    if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
                    923: 	    if (($depth >=0) && ($#$pars > 0) ) {
                    924: 		pop(@$pars);
                    925: 		pop(@Apache::lonxml::pwd);
                    926: 	    }
                    927: 	}
                    928: 	if ($top_empty && $depth >= 0) {
                    929: 	    #never found the end tag ran out of text, throw error send back blank
                    930: 	    &error('Never found end tag for &lt;'.$tag.
                    931: 		   '&gt; current string <pre>'.
                    932: 		   &HTML::Entities::encode($result).
                    933: 		   '</pre>');
                    934: 	    if ($gotfullstack) {
                    935: 		my $newstring='</'.$tag.'>'.$result;
                    936: 		&Apache::lonxml::newparser($pars,\$newstring);
                    937: 	    }
                    938: 	    $result='';
                    939: 	}
                    940:     } else {
                    941: 	while ($#$pars > -1) {
                    942: 	    while ($token = $$pars[-1]->get_token) {
                    943: 		#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                    944: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||
                    945: 		    ($token->[0] eq 'D')) {
                    946: 		    $result.=$token->[1];
                    947: 		} elsif ($token->[0] eq 'PI') {
                    948: 		    $result.=$token->[2];
                    949: 		} elsif ($token->[0] eq 'S') {
                    950: 		    if ( $token->[1] =~ /^$tag$/i) {
                    951: 			$$pars[-1]->unget_token($token); last;
                    952: 		    } else {
                    953: 			$result.=$token->[4];
                    954: 		    }
                    955: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
                    956: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
                    957: 		} elsif ($token->[0] eq 'E')  {
                    958: 		    $result.=$token->[2];
                    959: 		}
                    960: 	    }
                    961: 	    if (($#$pars > 0) ) {
                    962: 		pop(@$pars);
                    963: 		pop(@Apache::lonxml::pwd);
                    964: 	    } else { last; }
                    965: 	}
                    966:     }
                    967:     #&Apache::lonxml::debug("Exit:$result:");
                    968:     return $result
1.19      albertel  969: }
                    970: 
1.23      albertel  971: sub newparser {
                    972:   my ($parser,$contentref,$dir) = @_;
1.167     albertel  973:   push (@$parser,HTML::LCParser->new($contentref));
1.56      albertel  974:   $$parser['-1']->xml_mode('1');
1.23      albertel  975:   if ( $dir eq '' ) {
                    976:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                    977:   } else {
                    978:     push (@Apache::lonxml::pwd, $dir);
                    979:   } 
                    980: }
1.1       sakharuk  981: 
1.8       albertel  982: sub parstring {
                    983:   my ($token) = @_;
                    984:   my $temp='';
1.142     albertel  985:   foreach (@{$token->[3]}) {
1.35      www       986:     unless ($_=~/\W/) {
1.42      albertel  987:       my $val=$token->[2]->{$_};
1.231     albertel  988:       $val =~ s/([\%\@\\\"\'])/\\$1/g;
1.51      albertel  989:       #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.267     sakharuk  990:       $temp .= "my \$$_=\"$val\";";
1.20      albertel  991:     }
1.142     albertel  992:   }
1.8       albertel  993:   return $temp;
                    994: }
1.22      albertel  995: 
1.34      www       996: sub writeallows {
1.126     www       997:     unless ($#extlinks>=0) { return; }
1.34      www       998:     my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1.111     www       999:     if ($ENV{'httpref.'.$thisurl}) {
                   1000: 	$thisurl=$ENV{'httpref.'.$thisurl};
                   1001:     }
1.34      www      1002:     my $thisdir=$thisurl;
                   1003:     $thisdir=~s/\/[^\/]+$//;
                   1004:     my %httpref=();
1.142     albertel 1005:     foreach (@extlinks) {
1.34      www      1006:        $httpref{'httpref.'.
1.125     www      1007:  	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1.142     albertel 1008:     }
1.126     www      1009:     @extlinks=();
1.34      www      1010:     &Apache::lonnet::appenv(%httpref);
                   1011: }
                   1012: 
1.281     albertel 1013: sub register_ssi {
                   1014:     my ($url,%form)=@_;
                   1015:     push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
                   1016:     return '';
                   1017: }
                   1018: 
                   1019: sub do_registered_ssi {
                   1020:     foreach my $info (@Apache::lonxml::ssi_info) {
                   1021: 	my %form=%{ $info->{'form'}};
                   1022: 	my $url=$info->{'url'};
                   1023: 	&Apache::lonnet::ssi($url,%form);
                   1024:     }
                   1025: }
1.66      www      1026: #
                   1027: # Afterburner handles anchors, highlights and links
                   1028: #
                   1029: sub afterburn {
                   1030:     my $result=shift;
1.154     albertel 1031:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1032: 					    ['highlight','anchor','link']);
1.66      www      1033:     if ($ENV{'form.highlight'}) {
1.142     albertel 1034:        foreach (split(/\,/,$ENV{'form.highlight'})) {
1.66      www      1035:            my $anchorname=$_;
                   1036: 	   my $matchthis=$anchorname;
                   1037:            $matchthis=~s/\_+/\\s\+/g;
                   1038:            $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1039:        }
1.66      www      1040:     }
                   1041:     if ($ENV{'form.link'}) {
1.142     albertel 1042:        foreach (split(/\,/,$ENV{'form.link'})) {
1.66      www      1043:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1044: 	   my $matchthis=$anchorname;
                   1045:            $matchthis=~s/\_+/\\s\+/g;
                   1046:            $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1047:        }
1.66      www      1048:     }
                   1049:     if ($ENV{'form.anchor'}) {
                   1050:         my $anchorname=$ENV{'form.anchor'};
                   1051: 	my $matchthis=$anchorname;
                   1052:         $matchthis=~s/\_+/\\s\+/g;
                   1053:         $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
                   1054:         $result.=(<<"ENDSCRIPT");
1.226     albertel 1055: <script type="text/javascript">
1.66      www      1056:     document.location.hash='$anchorname';
                   1057: </script>
                   1058: ENDSCRIPT
                   1059:     }
                   1060:     return $result;
                   1061: }
                   1062: 
1.79      www      1063: sub storefile {
                   1064:     my ($file,$contents)=@_;
                   1065:     if (my $fh=Apache::File->new('>'.$file)) {
                   1066: 	print $fh $contents;
                   1067:         $fh->close();
1.271     www      1068:         return 1;
1.147     albertel 1069:     } else {
1.271     www      1070: 	&warning("Unable to save file $file");
                   1071: 	return 0;
1.79      www      1072:     }
                   1073: }
                   1074: 
1.151     albertel 1075: sub createnewhtml {
                   1076:   my $filecontents=(<<SIMPLECONTENT);
1.78      www      1077: <html>
                   1078: <head>
                   1079: <title>
                   1080:                            Title of Document Goes Here
                   1081: </title>
                   1082: </head>
                   1083: <body bgcolor="#FFFFFF">
                   1084: 
                   1085:                            Body of Document Goes Here
                   1086: 
                   1087: </body>
                   1088: </html>
                   1089: SIMPLECONTENT
1.151     albertel 1090:   return $filecontents;
                   1091: }
                   1092: 
1.274     albertel 1093: sub createnewsty {
                   1094:   my $filecontents=(<<SIMPLECONTENT);
                   1095: <definetag name="">
                   1096:     <render>
                   1097:        <web></web>
                   1098:        <tex></tex>
                   1099:     </render>
                   1100: </definetag>
                   1101: SIMPLECONTENT
                   1102:   return $filecontents;
                   1103: }
                   1104: 
1.147     albertel 1105: 
1.151     albertel 1106: sub inserteditinfo {
1.274     albertel 1107:       my ($result,$filecontents,$filetype)=@_;
1.157     albertel 1108:       $filecontents = &HTML::Entities::encode($filecontents);
1.147     albertel 1109: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.274     albertel 1110:       my $xml_help = '';
                   1111:       if ($filetype eq 'html') {
                   1112: 	  $xml_help=Apache::loncommon::helpLatexCheatsheet();
                   1113:       }
                   1114:       my $cleanbut = '';
                   1115:       if ($filetype eq 'html') {
1.280     www      1116: 	  $cleanbut='<input type="submit" name="attemptclean" value="'.
                   1117: 	      &mt('Save and then attempt to clean HTML').'" />';
1.274     albertel 1118:       }
1.254     albertel 1119:       my $titledisplay=&display_title();
1.280     www      1120:       my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
                   1121: 					 'vi' => 'View',
                   1122: 					 'ed' => 'Edit');
1.161     albertel 1123:       my $buttons=(<<BUTTONS);
1.274     albertel 1124: $cleanbut
1.280     www      1125: <input type="submit" name="savethisfile" value="$lt{'st'}" />
                   1126: <input type="submit" name="viewmode" value="$lt{'vi'}" />
1.161     albertel 1127: BUTTONS
1.78      www      1128:       my $editfooter=(<<ENDFOOTER);
                   1129: <hr />
                   1130: <a name="editsection" />
                   1131: <form method="post">
1.240     albertel 1132: $xml_help
1.280     www      1133: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1.170     www      1134: $buttons<br />
1.78      www      1135: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1.170     www      1136: <br />$buttons
1.78      www      1137: <br />
                   1138: </form>
1.254     albertel 1139: $titledisplay
1.78      www      1140: ENDFOOTER
1.147     albertel 1141: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1142:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1143:       return $result;
                   1144: }
                   1145: 
1.152     albertel 1146: sub get_target {
                   1147:   my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                   1148:   if ( $ENV{'request.state'} eq 'published') {
                   1149:     if ( defined($ENV{'form.grade_target'})
                   1150: 	 && ($viewgrades == 'F' )) {
                   1151:       return ($ENV{'form.grade_target'});
1.153     albertel 1152:     } elsif (defined($ENV{'form.grade_target'})) {
                   1153:       if (($ENV{'form.grade_target'} eq 'web') ||
                   1154: 	  ($ENV{'form.grade_target'} eq 'tex') ) {
                   1155: 	return $ENV{'form.grade_target'}
                   1156:       } else {
                   1157: 	return 'web';
                   1158:       }
1.152     albertel 1159:     } else {
                   1160:       return 'web';
                   1161:     }
                   1162:   } elsif ($ENV{'request.state'} eq 'construct') {
                   1163:     if ( defined($ENV{'form.grade_target'})) {
                   1164:       return ($ENV{'form.grade_target'});
                   1165:     } else {
                   1166:       return 'web';
                   1167:     }
                   1168:   } else {
                   1169:     return 'web';
                   1170:   }
                   1171: }
                   1172: 
1.24      sakharuk 1173: sub handler {
1.255     sakharuk 1174:     my $request=shift;
                   1175:     
                   1176:     my $target=&get_target();
                   1177:     
1.258     albertel 1178:     $Apache::lonxml::debug=$ENV{'user.debug'};
1.255     sakharuk 1179:     
                   1180:     if ($ENV{'browser.mathml'}) {
1.280     www      1181: 	&Apache::loncommon::content_type($request,'text/xml');
1.255     sakharuk 1182:     } else {
1.280     www      1183: 	&Apache::loncommon::content_type($request,'text/html');
1.255     sakharuk 1184:     }
                   1185:     &Apache::loncommon::no_cache($request);
                   1186:     $request->send_http_header;
                   1187:     
                   1188:     return OK if $request->header_only;
1.68      www      1189: 
                   1190: 
1.255     sakharuk 1191:     my $file=&Apache::lonnet::filelocation("",$request->uri);
1.274     albertel 1192:     my $filetype;
                   1193:     if ($file =~ /\.sty$/) {
                   1194: 	$filetype='sty';
                   1195:     } else {
                   1196: 	$filetype='html';
                   1197:     }
1.78      www      1198: #
                   1199: # Edit action? Save file.
                   1200: #
1.255     sakharuk 1201:     unless ($ENV{'request.state'} eq 'published') {
                   1202: 	if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1.271     www      1203: 	    if (&storefile($file,$ENV{'form.filecont'})) {
1.284     www      1204: 		$request->print("<font COLOR=\"#0000FF\">".&mt('Updated').": ".
                   1205: &Apache::lonlocal::locallocaltime(time)." </font>");
1.271     www      1206: 	    } 
1.255     sakharuk 1207: 	}
                   1208:     }
                   1209:     my %mystyle;
                   1210:     my $result = '';
                   1211:     my $filecontents=&Apache::lonnet::getfile($file);
                   1212:     if ($filecontents eq -1) {
1.284     www      1213: 	my $bodytag=&Apache::loncommon::bodytag('File Error');
                   1214: 	my $fnf=&mt('File not found');
1.255     sakharuk 1215: 	$result=(<<ENDNOTFOUND);
1.78      www      1216: <html>
                   1217: <head>
1.284     www      1218: <title>$fnf</title>
1.78      www      1219: </head>
1.284     www      1220: $bodytag
                   1221: <b>$fnf: $file</b>
1.78      www      1222: </body>
                   1223: </html>
                   1224: ENDNOTFOUND
1.50      albertel 1225:     $filecontents='';
1.255     sakharuk 1226: 	if ($ENV{'request.state'} ne 'published') {
1.274     albertel 1227: 	    if ($filetype eq 'sty') {
                   1228: 		$filecontents=&createnewsty();
                   1229: 	    } else {
                   1230: 		$filecontents=&createnewhtml();
                   1231: 	    }
1.255     sakharuk 1232: 	    $ENV{'form.editmode'}='Edit'; #force edit mode
                   1233: 	}
                   1234:     } else {
                   1235: 	unless ($ENV{'request.state'} eq 'published') {
                   1236: 	    if ($ENV{'form.attemptclean'}) {
                   1237: 		$filecontents=&htmlclean($filecontents,1);
                   1238: 	    }
1.264     www      1239: #
                   1240: # we are in construction space, see if edit mode forced
                   1241:             &Apache::loncommon::get_unprocessed_cgi
                   1242:                           ($ENV{'QUERY_STRING'},['editmode']);
1.255     sakharuk 1243: 	}
                   1244: 	if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
                   1245: 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1246: 						'',%mystyle);
                   1247: 	}
1.147     albertel 1248:     }
1.255     sakharuk 1249:     
1.78      www      1250: #
                   1251: # Edit action? Insert editing commands
                   1252: #
1.255     sakharuk 1253:     unless ($ENV{'request.state'} eq 'published') {
                   1254: 	if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
                   1255: 	    my $displayfile=$request->uri;
                   1256: 	    $displayfile=~s/^\/[^\/]*//;
                   1257: 	    $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
                   1258: 		'</h3></body></html>';
1.274     albertel 1259: 	    $result=&inserteditinfo($result,$filecontents,$filetype);
1.255     sakharuk 1260: 	}
1.147     albertel 1261:     }
1.274     albertel 1262:     if ($filetype eq 'html') { writeallows($request->uri); }
                   1263: 	
1.255     sakharuk 1264:     
                   1265: 
                   1266:     $request->print($result);
                   1267:     
                   1268:     return OK;
1.253     albertel 1269: }
                   1270: 
                   1271: sub display_title {
                   1272:     my $result;
                   1273:     if ($ENV{'request.state'} eq 'construct') {
                   1274: 	my $title=&Apache::lonnet::gettitle();
                   1275: 	if (!defined($title) || $title eq '') {
                   1276: 	    $title = $ENV{'request.filename'};
                   1277: 	    $title = substr($title, rindex($title, '/') + 1);
                   1278: 	}
                   1279: 	$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
                   1280:     }
                   1281:     return $result;
1.24      sakharuk 1282: }
1.147     albertel 1283: 
1.22      albertel 1284: sub debug {
                   1285:   if ($Apache::lonxml::debug eq 1) {
1.146     albertel 1286:     $|=1;
1.202     albertel 1287:     print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1.22      albertel 1288:   }
                   1289: }
1.49      albertel 1290: 
1.22      albertel 1291: sub error {
1.205     www      1292:   $errorcount++;
1.74      albertel 1293:   if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1.166     matthew  1294:     # If printing in construction space, put the error inside <pre></pre>
1.167     albertel 1295:     print "<b>ERROR:</b>".join("\n",@_)."\n";
1.52      albertel 1296:   } else {
                   1297:     print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
                   1298:     #notify author
1.146     albertel 1299:     &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1.52      albertel 1300:     #notify course
                   1301:     if ( $ENV{'request.course.id'} ) {
1.209     www      1302:       my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1.143     www      1303:       my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1.209     www      1304:       foreach (keys %users) {
                   1305: 	my ($user,$domain) = split(/:/, $_);
1.143     www      1306: 	&Apache::lonmsg::user_normal_msg($user,$domain,
1.146     albertel 1307:         "Error [$declutter]",join('<br />',@_));
1.52      albertel 1308:       }
                   1309:     }
1.74      albertel 1310: 
1.52      albertel 1311:     #FIXME probably shouldn't have me get everything forever.
1.146     albertel 1312:     &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1.74      albertel 1313:     #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1.52      albertel 1314:   }
1.22      albertel 1315: }
1.49      albertel 1316: 
1.22      albertel 1317: sub warning {
1.205     www      1318:   $warningcount++;
1.261     albertel 1319:   
                   1320:   if ($ENV{'form.grade_target'} ne 'tex') {
                   1321:       if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
                   1322:         print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
                   1323:       }
1.73      harris41 1324:   }
1.83      albertel 1325: }
                   1326: 
                   1327: sub get_param {
1.213     albertel 1328:     my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
                   1329:     if ( ! $context ) { $context = -1; }
                   1330:     my $args ='';
                   1331:     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
                   1332:     if ( ! $args ) { return undef; }
                   1333:     if ( $case_insensitive ) {
                   1334: 	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
                   1335: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1336:                                      $safeeval); #'
                   1337: 	} else {
                   1338: 	    return undef;
                   1339: 	}
                   1340:     } else {
                   1341: 	if ( $args =~ /my \$\Q$param\E=\"/ ) {
                   1342: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1343:                                      $safeeval); #'
                   1344: 	} else {
                   1345: 	    return undef;
                   1346: 	}
                   1347:     }
1.22      albertel 1348: }
                   1349: 
1.132     albertel 1350: sub get_param_var {
1.213     albertel 1351:   my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1.132     albertel 1352:   if ( ! $context ) { $context = -1; }
                   1353:   my $args ='';
                   1354:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.230     albertel 1355:   &Apache::lonxml::debug("Args are $args param is $param");
1.213     albertel 1356:   if ($case_insensitive) {
                   1357:       if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
                   1358: 	  return undef;
                   1359:       }
                   1360:   } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1.132     albertel 1361:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.230     albertel 1362:   &Apache::lonxml::debug("first run is $value");
                   1363:   if ($value =~ /^[\$\@\%]\w+$/) {
                   1364:       &Apache::lonxml::debug("doing second");
                   1365:       my @result=&Apache::run::run("return $value",$safeeval,1);
                   1366:       if (!defined($result[0])) {
                   1367: 	  return $value
                   1368:       } else {
                   1369: 	  if (wantarray) { return @result; } else { return $result[0]; }
                   1370:       }
1.132     albertel 1371:   } else {
                   1372:     return $value;
                   1373:   }
                   1374: }
                   1375: 
1.74      albertel 1376: sub register_insert {
1.75      albertel 1377:   my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74      albertel 1378:   my $i;
1.76      albertel 1379:   my $tagnum=0;
1.74      albertel 1380:   my @order;
                   1381:   for ($i=0;$i < $#data; $i++) {
                   1382:     my $line = $data[$i];
                   1383:     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
                   1384:     if ( $line =~ /TABLE/ ) { last; }
1.268     bowersj2 1385:     my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1.135     albertel 1386:     if ($tag) {
                   1387:       $insertlist{"$tagnum.tag"} = $tag;
                   1388:       $insertlist{"$tagnum.description"} = $descrip;
                   1389:       $insertlist{"$tagnum.color"} = $color;
                   1390:       $insertlist{"$tagnum.function"} = $function;
                   1391:       if (!defined($show)) { $show='yes'; }
                   1392:       $insertlist{"$tagnum.show"}= $show;
1.268     bowersj2 1393:       $insertlist{"$tagnum.helpfile"} = $helpfile;
                   1394:       $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1.135     albertel 1395:       $insertlist{"$tag.num"}=$tagnum;
                   1396:       $tagnum++;
                   1397:     }
1.74      albertel 1398:   }
1.76      albertel 1399:   $i++; #skipping TABLE line
                   1400:   $tagnum = 0;
1.74      albertel 1401:   for (;$i < $#data;$i++) {
                   1402:     my $line = $data[$i];
1.76      albertel 1403:     my ($mnemonic,@which) = split(/ +/,$line);
                   1404:     my $tag = $insertlist{"$tagnum.tag"};
1.144     matthew  1405:     for (my $j=0;$j <=$#which;$j++) {
1.74      albertel 1406:       if ( $which[$j] eq 'Y' ) {
1.76      albertel 1407: 	if ($insertlist{"$j.show"} ne 'no') {
                   1408: 	  push(@{ $insertlist{"$tag.which"} },$j);
                   1409: 	}
1.74      albertel 1410:       }
                   1411:     }
1.76      albertel 1412:     $tagnum++;
1.74      albertel 1413:   }
                   1414: }
1.98      albertel 1415: 
                   1416: sub description {
                   1417:   my ($token)=@_;
1.138     albertel 1418:   my $tagnum;
                   1419:   my $tag=$token->[1];
                   1420:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1421:     my $testtag=$namespace.'::'.$tag;
                   1422:     $tagnum=$insertlist{"$testtag.num"};
                   1423:     if (defined($tagnum)) { last; }
                   1424:   }
                   1425:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1426:   return $insertlist{$tagnum.'.description'};
1.268     bowersj2 1427: }
                   1428: 
                   1429: # Returns a list containing the help file, and the description
                   1430: sub helpinfo {
                   1431:   my ($token)=@_;
                   1432:   my $tagnum;
                   1433:   my $tag=$token->[1];
                   1434:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1435:     my $testtag=$namespace.'::'.$tag;
                   1436:     $tagnum=$insertlist{"$testtag.num"};
                   1437:     if (defined($tagnum)) { last; }
                   1438:   }
                   1439:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1440:   return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1.98      albertel 1441: }
1.123     albertel 1442: 
                   1443: # ----------------------------------------------------------------- whichuser
                   1444: # returns a list of $symb, $courseid, $domain, $name that is correct for
                   1445: # calls to lonnet functions for this setup.
                   1446: # - looks for form.grade_ parameters
                   1447: sub whichuser {
1.262     matthew  1448:   my ($passedsymb)=@_;
1.245     albertel 1449:   my ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1450:   if (defined($ENV{'form.grade_symb'})) {
                   1451:     my $tmp_courseid=$ENV{'form.grade_courseid'};
1.269     albertel 1452:     my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1.123     albertel 1453:     if ($allowed) {
                   1454:       $symb=$ENV{'form.grade_symb'};
                   1455:       $courseid=$ENV{'form.grade_courseid'};
                   1456:       $domain=$ENV{'form.grade_domain'};
                   1457:       $name=$ENV{'form.grade_username'};
                   1458:     }
1.134     albertel 1459:   } else {
1.262     matthew  1460:       if (!$passedsymb) {
                   1461:           $symb=&Apache::lonnet::symbread();
                   1462:       } else {
                   1463:           $symb=$passedsymb;
                   1464:       }
1.244     albertel 1465:       $courseid=$ENV{'request.course.id'};
                   1466:       $domain=$ENV{'user.domain'};
                   1467:       $name=$ENV{'user.name'};
                   1468:       if ($name eq 'public' && $domain eq 'public') {
                   1469: 	  if (!defined($ENV{'form.username'})) {
                   1470: 	      $ENV{'form.username'}.=time.rand(10000000);
                   1471: 	  }
                   1472: 	  $name.=$ENV{'form.username'};
                   1473:       }
1.123     albertel 1474:   }
1.245     albertel 1475:   return ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1476: }
                   1477: 
1.1       sakharuk 1478: 1;
                   1479: __END__
1.68      www      1480: 
                   1481: 

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