Annotation of loncom/xml/lonxml.pm, revision 1.312

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.312   ! albertel    4: # $Id: lonxml.pm,v 1.311 2004/03/19 22:01:13 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: 
1.295     albertel  170: #a header message to emit in the case of any generated warning or errors
                    171: $Apache::lonxml::warnings_error_header='';
                    172: 
1.68      www       173: sub xmlbegin {
                    174:   my $output='';
                    175:   if ($ENV{'browser.mathml'}) {
                    176:       $output='<?xml version="1.0"?>'
                    177:             .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
                    178:             .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
                    179:             .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
                    180:             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
                    181: 		.'xmlns="http://www.w3.org/TR/REC-html40">';
                    182:   } else {
                    183:       $output='<html>';
                    184:   }
                    185:   return $output;
                    186: }
                    187: 
                    188: sub xmlend {
1.278     www       189:     my $mode='xml';
                    190:     my $status='OPEN';
                    191:     if ($Apache::lonhomework::parsing_a_problem) {
                    192: 	$mode='problem';
                    193: 	$status=$Apache::inputtags::status[-1]; 
                    194:     }
1.298     albertel  195:     return &Apache::lonfeedback::list_discussion($mode,$status).'</html>';
1.119     www       196: }
                    197: 
                    198: sub tokeninputfield {
1.120     www       199:     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
                    200:     $defhost=~tr/a-z/A-Z/;
1.119     www       201:     return (<<ENDINPUTFIELD)
1.226     albertel  202: <script type="text/javascript">
1.120     www       203:     function updatetoken() {
                    204: 	var comp=new Array;
                    205:         var barcode=unescape(document.tokeninput.barcode.value);
                    206:         comp=barcode.split('*');
                    207:         if (typeof(comp[0])!="undefined") {
                    208: 	    document.tokeninput.codeone.value=comp[0];
                    209: 	}
                    210:         if (typeof(comp[1])!="undefined") {
                    211: 	    document.tokeninput.codetwo.value=comp[1];
                    212: 	}
                    213:         if (typeof(comp[2])!="undefined") {
                    214:             comp[2]=comp[2].toUpperCase();
                    215: 	    document.tokeninput.codethree.value=comp[2];
                    216: 	}
                    217:         document.tokeninput.barcode.value='';
                    218:     }  
                    219: </script>
                    220: <form method="post" name="tokeninput">
1.119     www       221: <table border="2" bgcolor="#FFFFBB">
                    222: <tr><th>DocID Checkin</th></tr>
                    223: <tr><td>
                    224: <table>
                    225: <tr>
                    226: <td>Scan in Barcode</td>
1.120     www       227: <td><input type="text" size="22" name="barcode" 
                    228: onChange="updatetoken()"/></td>
1.119     www       229: </tr>
                    230: <tr><td><i>or</i> Type in DocID</td>
                    231: <td>
                    232: <input type="text" size="5" name="codeone" />
1.120     www       233: <b><font size="+2">*</font></b>
1.119     www       234: <input type="text" size="5" name="codetwo" />
1.120     www       235: <b><font size="+2">*</font></b>
                    236: <input type="text" size="10" name="codethree" value="$defhost" 
                    237: onChange="this.value=this.value.toUpperCase()" />
1.119     www       238: </td></tr>
                    239: </table>
                    240: </td></tr>
                    241: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
                    242: </table>
                    243: </form>
                    244: ENDINPUTFIELD
1.112     www       245: }
                    246: 
1.116     www       247: sub maketoken {
1.118     www       248:     my ($symb,$tuname,$tudom,$tcrsid)=@_;
1.112     www       249:     unless ($symb) {
                    250: 	$symb=&Apache::lonnet::symbread();
                    251:     }
                    252:     unless ($tuname) {
                    253: 	$tuname=$ENV{'user.name'};
                    254:         $tudom=$ENV{'user.domain'};
                    255:         $tcrsid=$ENV{'request.course.id'};
                    256:     }
1.116     www       257: 
1.118     www       258:     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
                    259: }
                    260: 
                    261: sub printtokenheader {
1.133     albertel  262:     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
1.116     www       263:     unless ($token) { return ''; }
1.118     www       264: 
1.133     albertel  265:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    266:     unless ($tsymb) {
                    267: 	$tsymb=$symb;
1.118     www       268:     }
                    269:     unless ($tuname) {
1.133     albertel  270: 	$tuname=$name;
                    271:         $tudom=$domain;
                    272:         $tcrsid=$courseid;
1.118     www       273:     }
1.114     www       274: 
                    275:     my %reply=&Apache::lonnet::get('environment',
                    276:               ['firstname','middlename','lastname','generation'],
                    277:               $tudom,$tuname);
                    278:     my $plainname=$reply{'firstname'}.' '. 
                    279:                   $reply{'middlename'}.' '.
                    280:                   $reply{'lastname'}.' '.
                    281: 		  $reply{'generation'};
                    282: 
1.112     www       283:     if ($target eq 'web') {
1.145     www       284:         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
1.115     www       285: 	return 
1.221     albertel  286:  '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
1.284     www       287:                &mt('Checked out for').' '.$plainname.
                    288:                '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
                    289: 	       '<br />'.&mt('ID').': '.$idhash{$tuname}.
                    290: 	       '<br />'.&mt('CourseID').': '.$tcrsid.
                    291: 	       '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
                    292:                '<br />'.&mt('DocID').': '.$token.
                    293:                '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
1.112     www       294:     } else {
1.121     albertel  295:         return $token;
1.112     www       296:     }
1.68      www       297: }
                    298: 
1.70      www       299: sub fontsettings() {
                    300:     my $headerstring='';
                    301:     if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 
1.248     albertel  302: 	$headerstring.=
                    303: 	    '<meta Content-Type="text/html; charset=x-mac-roman">';
1.263     albertel  304:     } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
1.248     albertel  305: 	$headerstring.=
                    306: 	    '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
1.70      www       307:     }
                    308:     return $headerstring;
1.68      www       309: }
                    310: 
1.48      albertel  311: sub printalltags {
                    312:   my $temp;
                    313:   foreach $temp (sort keys %Apache::lonxml::alltags) {
1.141     albertel  314:     &Apache::lonxml::debug("$temp -- ".
                    315: 		  join(',',@{ $Apache::lonxml::alltags{$temp} }));
1.48      albertel  316:   }
                    317: }
1.31      sakharuk  318: 
1.3       sakharuk  319: sub xmlparse {
1.172     albertel  320:  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96      albertel  321: 
1.172     albertel  322:  &setup_globals($request,$target);
1.232     albertel  323:  &Apache::inputtags::initialize_inputtags();
                    324:  &Apache::outputtags::initialize_outputtags();
                    325:  &Apache::edit::initialize_edit();
1.287     albertel  326:  &Apache::londefdef::initialize_londefdef();
1.244     albertel  327: 
1.178     www       328: #
                    329: # do we have a course style file?
                    330: #
                    331: 
1.208     albertel  332:  if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
1.178     www       333:      my $bodytext=
                    334: 	 $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
                    335:      if ($bodytext) {
                    336:        my $location=&Apache::lonnet::filelocation('',$bodytext);
                    337:        my $styletext=&Apache::lonnet::getfile($location);
                    338:        if ($styletext ne '-1') {
                    339:           %style_for_target = (%style_for_target,
                    340:                           &Apache::style::styleparser($target,$styletext));
                    341:        }
                    342:     }
1.292     sakharuk  343:  } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
                    344:      my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
1.291     sakharuk  345:      my $styletext=&Apache::lonnet::getfile($location);
                    346:        if ($styletext ne '-1') {
                    347:           %style_for_target = (%style_for_target,
                    348:                           &Apache::style::styleparser($target,$styletext));
                    349:       }
1.178     www       350:  }
1.255     sakharuk  351: #&printalltags();
1.16      albertel  352:  my @pars = ();
1.23      albertel  353:  my $pwd=$ENV{'request.filename'};
                    354:  $pwd =~ s:/[^/]*$::;
                    355:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  356: 
1.3       sakharuk  357:  my $safeeval = new Safe;
1.40      albertel  358:  my $safehole = new Safe::Hole;
1.82      ng        359:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  360: #-------------------- Redefinition of the target in the case of compound target
                    361: 
                    362:  ($target, my @tenta) = split('&&',$target);
                    363: 
1.150     albertel  364:  my @stack = ();
1.3       sakharuk  365:  my @parstack = ();
1.17      albertel  366:  &initdepth;
1.67      www       367: 
1.101     albertel  368:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
                    369: 				   $safeeval,\%style_for_target);
1.255     sakharuk  370: 
1.125     www       371:  if ($ENV{'request.uri'}) {
                    372:     &writeallows($ENV{'request.uri'});
                    373:  }
1.281     albertel  374:  &do_registered_ssi();
1.204     albertel  375:  if ($Apache::lonxml::counter_changed) { &store_counter() }
1.3       sakharuk  376:  return $finaloutput;
1.106     www       377: }
                    378: 
                    379: sub htmlclean {
1.107     www       380:     my ($raw,$full)=@_;
1.106     www       381: 
                    382:     my $tree = HTML::TreeBuilder->new;
                    383:     $tree->ignore_unknown(0);
1.140     albertel  384: 
1.106     www       385:     $tree->parse($raw);
                    386: 
1.107     www       387:     my $output= $tree->as_HTML(undef,' ');
1.140     albertel  388: 
1.161     albertel  389:     $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
1.111     www       390:     $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
1.107     www       391:     unless ($full) {
                    392:        $output=~s/\<[\/]*(body|head|html)\>//gis;
                    393:     }
1.106     www       394: 
                    395:     $tree = $tree->delete;
                    396: 
                    397:     return $output;
1.15      albertel  398: }
                    399: 
1.191     albertel  400: sub latex_special_symbols {
1.272     albertel  401:     my ($string,$where)=@_;
1.235     sakharuk  402:     if ($where eq 'header') {
1.272     albertel  403: 	$string =~ s/(\\|_|\^)/ /g;
1.311     albertel  404: 	$string =~ s/(\$|%|\{|\})/\\$1/g;
1.273     sakharuk  405: 	$string =~ s/_/ /g;
1.311     albertel  406: 	$string=&Apache::lonprintout::character_chart($string);
                    407: 	# any & or # leftover should be safe to just escape
                    408:         $string=~s/([^\\])\&/$1\\\&/g;
                    409:         $string=~s/([^\\])\#/$1\\\#/g;
1.229     sakharuk  410:     } else {
1.312   ! albertel  411: 	$string=~s/\\/\\ensuremath{\\backslash}/g;
1.310     sakharuk  412: 	$string=~s/([^\\])\%/$1\\\%/g;
                    413: 	$string=~s/([^\\])(\$|_)/$1\\$2/g;
                    414: 	$string=~s/\$\$/\$\\\$/g;
                    415: 	$string=~s/\#\#/\#\\\#/g;
                    416:         $string=~s/([^\\])(\~|\^)/$1\\$2\\strut /g;
                    417: 	$string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
1.311     albertel  418: 	$string=&Apache::lonprintout::character_chart($string);
                    419: 	# any & or # leftover should be safe to just escape
                    420:         $string=~s/([^\\])\&/$1\\\&/g;
                    421:         $string=~s/([^\\])\#/$1\\\#/g;
1.310     sakharuk  422: #single { or } How to escape?
1.229     sakharuk  423:     }
1.272     albertel  424:     return $string;
1.188     sakharuk  425: }
                    426: 
1.101     albertel  427: sub inner_xmlparse {
                    428:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
                    429:   my $finaloutput = '';
                    430:   my $result;
                    431:   my $token;
1.258     albertel  432:   my $dontpop=0;
1.101     albertel  433:   while ( $#$pars > -1 ) {
                    434:     while ($token = $$pars['-1']->get_token) {
1.261     albertel  435:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
1.101     albertel  436: 	if ($metamode<1) {
1.190     albertel  437: 	    my $text=$token->[1];
1.193     albertel  438: 	    if ($token->[0] eq 'C' && $target eq 'tex') {
1.239     sakharuk  439: 		$text = '';
                    440: #		$text = '%'.$text."\n";
1.182     sakharuk  441: 	    }
1.190     albertel  442: 	    $result.=$text;
1.101     albertel  443: 	}
1.261     albertel  444:       } elsif (($token->[0] eq 'D')) {
                    445: 	if ($metamode<1 && $target eq 'web') {
                    446: 	    my $text=$token->[1];
                    447: 	    $result.=$text;
                    448: 	}
1.101     albertel  449:       } elsif ($token->[0] eq 'PI') {
1.261     albertel  450: 	if ($metamode<1 && $target eq 'web') {
1.101     albertel  451: 	  $result=$token->[2];
                    452: 	}
                    453:       } elsif ($token->[0] eq 'S') {
1.140     albertel  454: 	# add tag to stack
1.101     albertel  455: 	push (@$stack,$token->[1]);
                    456: 	# add parameters list to another stack
                    457: 	push (@$parstack,&parstring($token));
1.140     albertel  458: 	&increasedepth($token);
1.212     albertel  459: 	if ($Apache::lonxml::usestyle &&
                    460: 	    exists($$style_for_target{$token->[1]})) {
                    461: 	    $Apache::lonxml::usestyle=0;
                    462: 	    my $string=$$style_for_target{$token->[1]}.
                    463: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    464: 	    &Apache::lonxml::newparser($pars,\$string);
1.257     albertel  465: 	    $Apache::lonxml::style_values=$$parstack[-1];
1.259     albertel  466: 	    $Apache::lonxml::style_end_values=$$parstack[-1];
1.101     albertel  467: 	} else {
                    468: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    469: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  470: 	}
1.101     albertel  471:       } elsif ($token->[0] eq 'E') {
1.212     albertel  472: 	if ($Apache::lonxml::usestyle &&
                    473: 	    exists($$style_for_target{'/'."$token->[1]"})) {
                    474: 	    $Apache::lonxml::usestyle=0;
                    475: 	    my $string=$$style_for_target{'/'.$token->[1]}.
1.258     albertel  476: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
1.212     albertel  477: 	    &Apache::lonxml::newparser($pars,\$string);
1.259     albertel  478: 	    $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
                    479: 	    $Apache::lonxml::style_end_values='';
1.258     albertel  480: 	    $dontpop=1;
1.101     albertel  481: 	} else {
1.258     albertel  482: 	    #clear out any tags that didn't end
                    483: 	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
                    484: 		my $lasttag=$$stack[-1];
                    485: 		if ($token->[1] =~ /^$lasttag$/i) {
                    486: 		    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' as end tag to &lt;'.$$stack[-1].'&gt;');
                    487: 		    last;
                    488: 		} else {
                    489: 		    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' when looking for &lt;/'.$$stack[-1].'&gt; in file');
                    490: 		    &end_tag($stack,$parstack,$token);
                    491: 		}
                    492: 	    }
                    493: 	    $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    494: 			       $parstack, $pars,$safeeval, $style_for_target);
1.101     albertel  495: 	}
                    496:       } else {
                    497: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    498:       }
                    499:       #evaluate variable refs in result
1.282     albertel  500:       if ($Apache::lonxml::post_evaluate &&$result ne "") {
1.257     albertel  501: 	  my $extras;
                    502: 	  if (!$Apache::lonxml::usestyle) {
                    503: 	      $extras=$Apache::lonxml::style_values;
                    504: 	  }
1.101     albertel  505: 	if ( $#$parstack > -1 ) {
1.257     albertel  506: 	  $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
1.101     albertel  507: 	} else {
1.257     albertel  508: 	  $result= &Apache::run::evaluate($result,$safeeval,$extras);
1.101     albertel  509: 	}
1.163     albertel  510:       }
1.282     albertel  511:       $Apache::lonxml::post_evaluate=1;
                    512: 
1.190     albertel  513:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.249     albertel  514: 	  #Style file definitions should be correct
1.250     albertel  515: 	  if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
1.311     albertel  516: 	      $result=&latex_special_symbols($result);
1.249     albertel  517: 	  }
1.190     albertel  518:       }
                    519: 
1.169     albertel  520:       # Encode any high ASCII characters
1.279     albertel  521: #      if (!$Apache::lonxml::prevent_entity_encode) {
                    522: #	$result=&HTML::Entities::encode($result,"\200-\377");
                    523: #      }
1.169     albertel  524:       if ($Apache::lonxml::redirection) {
                    525: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    526:       } else {
                    527: 	$finaloutput.=$result;
                    528:       }
                    529:       $result = '';
                    530: 
1.258     albertel  531:       if ($token->[0] eq 'E' && !$dontpop) {
1.101     albertel  532: 	&end_tag($stack,$parstack,$token);
                    533:       }
1.258     albertel  534:       $dontpop=0;
1.224     albertel  535:     }	
1.212     albertel  536:     if ($#$pars > -1) {
                    537: 	pop @$pars;
                    538: 	pop @Apache::lonxml::pwd;
                    539:     }
1.101     albertel  540:   }
                    541: 
                    542:   # if ($target eq 'meta') {
                    543:   #   $finaloutput.=&endredirection;
                    544:   # }
                    545: 
1.169     albertel  546: 
1.101     albertel  547:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    548:     $finaloutput=&afterburn($finaloutput);
1.216     sakharuk  549:   }	    
1.101     albertel  550:   return $finaloutput;
                    551: }
1.67      www       552: 
1.7       albertel  553: sub callsub {
1.84      albertel  554:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  555:   my $currentstring='';
1.72      albertel  556:   my $nodefault;
1.7       albertel  557:   {
1.59      albertel  558:     my $sub1;
1.7       albertel  559:     no strict 'refs';
1.68      www       560:     my $tag=$token->[1];
1.236     www       561: # get utterly rid of extended html tags
                    562:     if ($tag=~/^x\-/i) { return ''; }
1.141     albertel  563:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       564:     if (!$space) {
1.141     albertel  565:      	$tag=~tr/A-Z/a-z/;
1.68      www       566: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  567: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       568:     }
1.97      albertel  569: 
                    570:     my $deleted=0;
                    571:     $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
                    572:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    573:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    574: 					     $parstack,$parser,$safeeval,
                    575: 					     $style);
                    576:     }
                    577:     if (!$deleted) {
                    578:       if ($space) {
1.220     albertel  579: 	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  580: 	$sub1="$space\:\:$sub";
                    581: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    582: 					     $parstack,$parser,$safeeval,
                    583: 					     $style);
                    584:       } else {
1.220     albertel  585: 	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
1.97      albertel  586: 	if ($metamode <1) {
                    587: 	  if (defined($token->[4]) && ($metamode < 1)) {
                    588: 	    $currentstring = $token->[4];
                    589: 	  } else {
                    590: 	    $currentstring = $token->[2];
                    591: 	  }
1.62      sakharuk  592: 	}
1.7       albertel  593:       }
1.97      albertel  594:       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
                    595:       if ($currentstring eq '' && $nodefault eq '') {
                    596: 	if ($target eq 'edit') {
1.220     albertel  597: 	  #&Apache::lonxml::debug("doing default edit for $token->[1]");
1.97      albertel  598: 	  if ($token->[0] eq 'S') {
                    599: 	    $currentstring = &Apache::edit::tag_start($target,$token);
                    600: 	  } elsif ($token->[0] eq 'E') {
                    601: 	    $currentstring = &Apache::edit::tag_end($target,$token);
                    602: 	  }
                    603: 	} elsif ($target eq 'modified') {
                    604: 	  if ($token->[0] eq 'S') {
                    605: 	    $currentstring = $token->[4];
                    606: 	    $currentstring.=&Apache::edit::handle_insert();
1.210     www       607: 	  } elsif ($token->[0] eq 'E') {
                    608: 	    $currentstring = $token->[2];
                    609:             $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
1.97      albertel  610: 	  } else {
                    611: 	    $currentstring = $token->[2];
                    612: 	  }
1.72      albertel  613: 	}
                    614:       }
1.7       albertel  615:     }
                    616:     use strict 'refs';
                    617:   }
                    618:   return $currentstring;
1.82      ng        619: }
                    620: 
1.96      albertel  621: sub setup_globals {
1.172     albertel  622:   my ($request,$target)=@_;
                    623:   $Apache::lonxml::request=$request;
1.99      albertel  624:   $Apache::lonxml::registered = 0;
1.205     www       625:   $errorcount=0;
                    626:   $warningcount=0;
1.207     albertel  627:   $Apache::lonxml::default_homework_loaded=0;
1.212     albertel  628:   $Apache::lonxml::usestyle=1;
1.204     albertel  629:   &init_counter();
1.101     albertel  630:   @Apache::lonxml::pwd=();
1.124     albertel  631:   @Apache::lonxml::extlinks=();
1.281     albertel  632:   @Apache::lonxml::ssi_info=();
1.282     albertel  633:   $Apache::lonxml::post_evaluate=1;
1.295     albertel  634:   $Apache::lonxml::warnings_error_header='';
1.96      albertel  635:   if ($target eq 'meta') {
                    636:     $Apache::lonxml::redirection = 0;
                    637:     $Apache::lonxml::metamode = 1;
                    638:     $Apache::lonxml::evaluate = 1;
                    639:     $Apache::lonxml::import = 0;
1.129     albertel  640:   } elsif ($target eq 'answer') {
                    641:     $Apache::lonxml::redirection = 0;
                    642:     $Apache::lonxml::metamode = 1;
                    643:     $Apache::lonxml::evaluate = 1;
                    644:     $Apache::lonxml::import = 1;
1.96      albertel  645:   } elsif ($target eq 'grade') {
                    646:     &startredirection;
                    647:     $Apache::lonxml::metamode = 0;
                    648:     $Apache::lonxml::evaluate = 1;
                    649:     $Apache::lonxml::import = 1;
                    650:   } elsif ($target eq 'modified') {
                    651:     $Apache::lonxml::redirection = 0;
                    652:     $Apache::lonxml::metamode = 0;
                    653:     $Apache::lonxml::evaluate = 0;
                    654:     $Apache::lonxml::import = 0;
                    655:   } elsif ($target eq 'edit') {
                    656:     $Apache::lonxml::redirection = 0;
                    657:     $Apache::lonxml::metamode = 0;
                    658:     $Apache::lonxml::evaluate = 0;
                    659:     $Apache::lonxml::import = 0;
1.163     albertel  660:   } elsif ($target eq 'analyze') {
                    661:     $Apache::lonxml::redirection = 0;
                    662:     $Apache::lonxml::metamode = 0;
                    663:     $Apache::lonxml::evaluate = 1;
                    664:     $Apache::lonxml::import = 1;
1.96      albertel  665:   } else {
                    666:     $Apache::lonxml::redirection = 0;
                    667:     $Apache::lonxml::metamode = 0;
                    668:     $Apache::lonxml::evaluate = 1;
                    669:     $Apache::lonxml::import = 1;
                    670:   }
                    671: }
                    672: 
1.82      ng        673: sub init_safespace {
                    674:   my ($target,$safeeval,$safehole,$safeinit) = @_;
                    675:   $safeeval->permit("entereval");
                    676:   $safeeval->permit(":base_math");
                    677:   $safeeval->permit("sort");
1.286     albertel  678:   $safeeval->permit("time");
1.82      ng        679:   $safeeval->deny(":base_io");
1.102     albertel  680:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.251     albertel  681:   $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
1.82      ng        682:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
                    683:   
                    684:   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
                    685:   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
                    686:   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
                    687:   $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
                    688:   $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
                    689:   $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
                    690:   $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
                    691:   $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
                    692:   $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
                    693:   $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
                    694:   $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
                    695:   $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
                    696:   $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
                    697:   $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
                    698:   $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
                    699:   $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
                    700:   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
                    701:   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
                    702:   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.215     albertel  703:   
                    704:   $safehole->wrap(\&Math::Cephes::bdtr  ,$safeeval,'&bdtr'  );
                    705:   $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
                    706:   $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
                    707:   $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
                    708:   $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
                    709:   $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
                    710:   $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
                    711:   $safehole->wrap(\&Math::Cephes::fdtr  ,$safeeval,'&fdtr'  );
                    712:   $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
                    713:   $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
                    714:   $safehole->wrap(\&Math::Cephes::gdtr  ,$safeeval,'&gdtr'  );
                    715:   $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
                    716:   $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
                    717:   $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
                    718:   $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
                    719:   $safehole->wrap(\&Math::Cephes::ndtr  ,$safeeval,'&ndtr'  );
                    720:   $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
                    721:   $safehole->wrap(\&Math::Cephes::pdtr  ,$safeeval,'&pdtr'  );
                    722:   $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
                    723:   $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
                    724:   $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
                    725:   $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
                    726: 
                    727: #  $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
                    728: #  $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
                    729: #  $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
                    730: #  $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
                    731: #  $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
                    732: #  $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
                    733: 
1.91      ng        734:   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
                    735:   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
                    736:   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
                    737:   $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
                    738:   $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
                    739:   $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
                    740:   $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
                    741:   $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
                    742:   $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
                    743:   $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
                    744:   $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93      ng        745:   $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91      ng        746:   $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
                    747:   $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
                    748:   $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
                    749:   $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
                    750:   $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
                    751:   $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
                    752:   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
                    753:   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
                    754:   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
1.305     albertel  755:   $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
1.311     albertel  756:   $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
1.91      ng        757: 
1.82      ng        758: #need to inspect this class of ops
                    759: # $safeeval->deny(":base_orig");
1.91      ng        760:   $safeinit .= ';$external::target="'.$target.'";';
1.121     albertel  761:   my $rndseed;
1.123     albertel  762:   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    763:   $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
1.121     albertel  764:   $safeinit .= ';$external::randomseed='.$rndseed.';';
1.249     albertel  765:   &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.82      ng        766:   &Apache::run::run($safeinit,$safeeval);
1.303     albertel  767: 
                    768:   my $subroutine=<<'EVALUATESUB';
                    769: sub __LC_INTERNAL_EVALUATE__ {
                    770:     my ($__LC__a,$__LC__b,$__LC__c)=@_;
                    771:     my $__LC__prefix;
                    772:     while(1){
                    773: 	{ 
1.306     albertel  774: 	    use strict;
                    775: 	    no strict "vars";
1.303     albertel  776: 	    if (eval(defined(eval($__LC__a.$__LC__b)))) {
1.306     albertel  777: 		return $__LC__prefix.eval($__LC__a.$__LC__b.$__LC__c);
1.303     albertel  778: 	    }
                    779: 	}
                    780: 	$__LC__prefix.=substr($__LC__a,0,1,"");
                    781: 	if ($__LC__a!~/^(\$|&|\#)/) { last; }
                    782:     }
1.306     albertel  783:     return $__LC__prefix.$__LC__a.$__LC__b.$__LC__c;
1.303     albertel  784: }
                    785: EVALUATESUB
                    786:     $safeeval->permit("require");
                    787:     $safeeval->reval($subroutine);
                    788:     $safeeval->deny("require");
1.207     albertel  789: }
                    790: 
                    791: sub default_homework_load {
                    792:     my ($safeeval)=@_;
                    793:     &Apache::lonxml::debug('Loading default_homework');
                    794:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1.241     albertel  795:     if ($default eq -1) {
1.207     albertel  796: 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
                    797:     } else {
                    798: 	&Apache::run::run($default,$safeeval);
                    799: 	$Apache::lonxml::default_homework_loaded=1;
                    800:     }
1.17      albertel  801: }
                    802: 
1.55      albertel  803: sub startredirection {
                    804:   $Apache::lonxml::redirection++;
                    805:   push (@Apache::lonxml::outputstack, '');
                    806: }
                    807: 
                    808: sub endredirection {
                    809:   if (!$Apache::lonxml::redirection) {
1.72      albertel  810:     &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1.55      albertel  811:     return '';
                    812:   }
                    813:   $Apache::lonxml::redirection--;
                    814:   pop @Apache::lonxml::outputstack;
1.97      albertel  815: }
                    816: 
                    817: sub end_tag {
                    818:   my ($tagstack,$parstack,$token)=@_;
                    819:   pop(@$tagstack);
                    820:   pop(@$parstack);
                    821:   &decreasedepth($token);
1.55      albertel  822: }
                    823: 
1.17      albertel  824: sub initdepth {
                    825:   @Apache::lonxml::depthcounter=();
                    826:   $Apache::lonxml::depth=-1;
                    827:   $Apache::lonxml::olddepth=-1;
                    828: }
                    829: 
                    830: sub increasedepth {
1.19      albertel  831:   my ($token) = @_;
1.17      albertel  832:   $Apache::lonxml::depth++;
                    833:   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
                    834:   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
                    835:     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
                    836:   }
1.42      albertel  837:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  838:   &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54      albertel  839: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  840: }
                    841: 
                    842: sub decreasedepth {
1.19      albertel  843:   my ($token) = @_;
1.17      albertel  844:   $Apache::lonxml::depth--;
1.36      albertel  845:   if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
                    846:     $#Apache::lonxml::depthcounter--;
                    847:     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
                    848:   }
1.43      albertel  849:   if (  $Apache::lonxml::depth < -1) {
1.280     www       850:     &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1.43      albertel  851:     $Apache::lonxml::depth='-1';
                    852:   }
1.42      albertel  853:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  854:   &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54      albertel  855: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  856: }
1.19      albertel  857: 
1.180     albertel  858: sub get_all_text_unbalanced {
1.190     albertel  859: #there is a copy of this in lonpublisher.pm
1.180     albertel  860:  my($tag,$pars)= @_;
                    861:  my $token;
                    862:  my $result='';
                    863:  $tag='<'.$tag.'>';
                    864:  while ($token = $$pars[-1]->get_token) {
                    865:    if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    866:      $result.=$token->[1];
                    867:    } elsif ($token->[0] eq 'PI') {
                    868:      $result.=$token->[2];
                    869:    } elsif ($token->[0] eq 'S') {
                    870:      $result.=$token->[4];
                    871:    } elsif ($token->[0] eq 'E')  {
                    872:      $result.=$token->[2];
                    873:    }
1.211     albertel  874:    if ($result =~ /(.*)\Q$tag\E(.*)/s) {
1.180     albertel  875:      &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    876:      &Apache::lonxml::debug('Result is :'.$1);
                    877:      $result=$1;
                    878:      my $redo=$tag.$2;
                    879:      &Apache::lonxml::newparser($pars,\$redo);
                    880:      last;
                    881:    }
                    882:  }
                    883:  return $result
1.204     albertel  884: }
                    885: 
                    886: sub increment_counter {
1.247     albertel  887:     my ($increment) = @_;
1.289     sakharuk  888:     if (defined($increment) && $increment gt 0) {
                    889: 	$Apache::lonxml::counter+=$increment;
                    890:     } else {
                    891: 	$Apache::lonxml::counter++;
1.247     albertel  892:     }
1.289     sakharuk  893:     $Apache::lonxml::counter_changed=1;
1.204     albertel  894: }
                    895: 
                    896: sub init_counter {
                    897:     if (defined($ENV{'form.counter'})) {
                    898: 	$Apache::lonxml::counter=$ENV{'form.counter'};
1.247     albertel  899: 	$Apache::lonxml::counter_changed=0;
1.237     sakharuk  900:     } else {
1.204     albertel  901: 	$Apache::lonxml::counter=1;
1.247     albertel  902: 	$Apache::lonxml::counter_changed=1;
1.204     albertel  903:     }
                    904: }
                    905: 
                    906: sub store_counter {
                    907:     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
                    908:     return '';
1.180     albertel  909: }
                    910: 
1.19      albertel  911: sub get_all_text {
1.270     albertel  912:     my($tag,$pars,$style)= @_;
                    913:     my $gotfullstack=1;
                    914:     if (ref($pars) ne 'ARRAY') {
                    915: 	$gotfullstack=0;
                    916: 	$pars=[$pars];
                    917:     }
                    918:     if (ref($style) ne 'HASH') {
                    919: 	$style={};
                    920:     }
                    921:     my $depth=0;
                    922:     my $token;
                    923:     my $result='';
                    924:     if ( $tag =~ m:^/: ) { 
                    925: 	my $tag=substr($tag,1); 
                    926: 	#&Apache::lonxml::debug("have:$tag:");
                    927: 	my $top_empty=0;
                    928: 	while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
                    929: 	    while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
                    930: 		#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
                    931: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    932: 		    $result.=$token->[1];
                    933: 		} elsif ($token->[0] eq 'PI') {
                    934: 		    $result.=$token->[2];
                    935: 		} elsif ($token->[0] eq 'S') {
                    936: 		    if ($token->[1] =~ /^$tag$/i) { $depth++; }
                    937: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
                    938: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
                    939: 		    $result.=$token->[4];
                    940: 		} elsif ($token->[0] eq 'E')  {
                    941: 		    if ( $token->[1] =~ /^$tag$/i) { $depth--; }
                    942: 		    #skip sending back the last end tag
1.283     albertel  943: 		    if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1.270     albertel  944: 			my $string=
                    945: 			    '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
                    946: 				$$style{'/'.$token->[1]}.
                    947: 				    $token->[2].
                    948: 					'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    949: 			&Apache::lonxml::newparser($pars,\$string);
                    950: 			#&Apache::lonxml::debug("reParsing $string");
                    951: 			next;
                    952: 		    }
                    953: 		    if ($depth > -1) {
                    954: 			$result.=$token->[2];
                    955: 		    } else {
                    956: 			$$pars[-1]->unget_token($token);
                    957: 		    }
                    958: 		}
                    959: 	    }
                    960: 	    if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
                    961: 	    if (($depth >=0) && ($#$pars > 0) ) {
                    962: 		pop(@$pars);
                    963: 		pop(@Apache::lonxml::pwd);
                    964: 	    }
                    965: 	}
                    966: 	if ($top_empty && $depth >= 0) {
                    967: 	    #never found the end tag ran out of text, throw error send back blank
                    968: 	    &error('Never found end tag for &lt;'.$tag.
                    969: 		   '&gt; current string <pre>'.
                    970: 		   &HTML::Entities::encode($result).
                    971: 		   '</pre>');
                    972: 	    if ($gotfullstack) {
                    973: 		my $newstring='</'.$tag.'>'.$result;
                    974: 		&Apache::lonxml::newparser($pars,\$newstring);
                    975: 	    }
                    976: 	    $result='';
                    977: 	}
                    978:     } else {
                    979: 	while ($#$pars > -1) {
                    980: 	    while ($token = $$pars[-1]->get_token) {
                    981: 		#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                    982: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||
                    983: 		    ($token->[0] eq 'D')) {
                    984: 		    $result.=$token->[1];
                    985: 		} elsif ($token->[0] eq 'PI') {
                    986: 		    $result.=$token->[2];
                    987: 		} elsif ($token->[0] eq 'S') {
                    988: 		    if ( $token->[1] =~ /^$tag$/i) {
                    989: 			$$pars[-1]->unget_token($token); last;
                    990: 		    } else {
                    991: 			$result.=$token->[4];
                    992: 		    }
                    993: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
                    994: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
                    995: 		} elsif ($token->[0] eq 'E')  {
                    996: 		    $result.=$token->[2];
                    997: 		}
                    998: 	    }
                    999: 	    if (($#$pars > 0) ) {
                   1000: 		pop(@$pars);
                   1001: 		pop(@Apache::lonxml::pwd);
                   1002: 	    } else { last; }
                   1003: 	}
                   1004:     }
                   1005:     #&Apache::lonxml::debug("Exit:$result:");
                   1006:     return $result
1.19      albertel 1007: }
                   1008: 
1.23      albertel 1009: sub newparser {
                   1010:   my ($parser,$contentref,$dir) = @_;
1.167     albertel 1011:   push (@$parser,HTML::LCParser->new($contentref));
1.56      albertel 1012:   $$parser['-1']->xml_mode('1');
1.23      albertel 1013:   if ( $dir eq '' ) {
                   1014:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                   1015:   } else {
                   1016:     push (@Apache::lonxml::pwd, $dir);
                   1017:   } 
                   1018: }
1.1       sakharuk 1019: 
1.8       albertel 1020: sub parstring {
                   1021:   my ($token) = @_;
                   1022:   my $temp='';
1.142     albertel 1023:   foreach (@{$token->[3]}) {
1.35      www      1024:     unless ($_=~/\W/) {
1.42      albertel 1025:       my $val=$token->[2]->{$_};
1.231     albertel 1026:       $val =~ s/([\%\@\\\"\'])/\\$1/g;
1.51      albertel 1027:       #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.267     sakharuk 1028:       $temp .= "my \$$_=\"$val\";";
1.20      albertel 1029:     }
1.142     albertel 1030:   }
1.8       albertel 1031:   return $temp;
                   1032: }
1.22      albertel 1033: 
1.34      www      1034: sub writeallows {
1.126     www      1035:     unless ($#extlinks>=0) { return; }
1.34      www      1036:     my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1.111     www      1037:     if ($ENV{'httpref.'.$thisurl}) {
                   1038: 	$thisurl=$ENV{'httpref.'.$thisurl};
                   1039:     }
1.34      www      1040:     my $thisdir=$thisurl;
                   1041:     $thisdir=~s/\/[^\/]+$//;
                   1042:     my %httpref=();
1.142     albertel 1043:     foreach (@extlinks) {
1.34      www      1044:        $httpref{'httpref.'.
1.125     www      1045:  	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1.142     albertel 1046:     }
1.126     www      1047:     @extlinks=();
1.34      www      1048:     &Apache::lonnet::appenv(%httpref);
                   1049: }
                   1050: 
1.281     albertel 1051: sub register_ssi {
                   1052:     my ($url,%form)=@_;
                   1053:     push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
                   1054:     return '';
                   1055: }
                   1056: 
                   1057: sub do_registered_ssi {
                   1058:     foreach my $info (@Apache::lonxml::ssi_info) {
                   1059: 	my %form=%{ $info->{'form'}};
                   1060: 	my $url=$info->{'url'};
                   1061: 	&Apache::lonnet::ssi($url,%form);
                   1062:     }
                   1063: }
1.66      www      1064: #
                   1065: # Afterburner handles anchors, highlights and links
                   1066: #
                   1067: sub afterburn {
                   1068:     my $result=shift;
1.154     albertel 1069:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1070: 					    ['highlight','anchor','link']);
1.66      www      1071:     if ($ENV{'form.highlight'}) {
1.142     albertel 1072:        foreach (split(/\,/,$ENV{'form.highlight'})) {
1.66      www      1073:            my $anchorname=$_;
                   1074: 	   my $matchthis=$anchorname;
                   1075:            $matchthis=~s/\_+/\\s\+/g;
                   1076:            $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1077:        }
1.66      www      1078:     }
                   1079:     if ($ENV{'form.link'}) {
1.142     albertel 1080:        foreach (split(/\,/,$ENV{'form.link'})) {
1.66      www      1081:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1082: 	   my $matchthis=$anchorname;
                   1083:            $matchthis=~s/\_+/\\s\+/g;
                   1084:            $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1085:        }
1.66      www      1086:     }
                   1087:     if ($ENV{'form.anchor'}) {
                   1088:         my $anchorname=$ENV{'form.anchor'};
                   1089: 	my $matchthis=$anchorname;
                   1090:         $matchthis=~s/\_+/\\s\+/g;
                   1091:         $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
                   1092:         $result.=(<<"ENDSCRIPT");
1.226     albertel 1093: <script type="text/javascript">
1.66      www      1094:     document.location.hash='$anchorname';
                   1095: </script>
                   1096: ENDSCRIPT
                   1097:     }
                   1098:     return $result;
                   1099: }
                   1100: 
1.79      www      1101: sub storefile {
                   1102:     my ($file,$contents)=@_;
1.290     albertel 1103:     &Apache::lonnet::correct_line_ends(\$contents);
1.79      www      1104:     if (my $fh=Apache::File->new('>'.$file)) {
                   1105: 	print $fh $contents;
                   1106:         $fh->close();
1.271     www      1107:         return 1;
1.147     albertel 1108:     } else {
1.271     www      1109: 	&warning("Unable to save file $file");
                   1110: 	return 0;
1.79      www      1111:     }
                   1112: }
                   1113: 
1.151     albertel 1114: sub createnewhtml {
                   1115:   my $filecontents=(<<SIMPLECONTENT);
1.78      www      1116: <html>
                   1117: <head>
                   1118: <title>
                   1119:                            Title of Document Goes Here
                   1120: </title>
                   1121: </head>
                   1122: <body bgcolor="#FFFFFF">
                   1123: 
                   1124:                            Body of Document Goes Here
                   1125: 
                   1126: </body>
                   1127: </html>
                   1128: SIMPLECONTENT
1.151     albertel 1129:   return $filecontents;
                   1130: }
                   1131: 
1.274     albertel 1132: sub createnewsty {
                   1133:   my $filecontents=(<<SIMPLECONTENT);
                   1134: <definetag name="">
                   1135:     <render>
                   1136:        <web></web>
                   1137:        <tex></tex>
                   1138:     </render>
                   1139: </definetag>
                   1140: SIMPLECONTENT
                   1141:   return $filecontents;
                   1142: }
                   1143: 
1.147     albertel 1144: 
1.151     albertel 1145: sub inserteditinfo {
1.274     albertel 1146:       my ($result,$filecontents,$filetype)=@_;
1.157     albertel 1147:       $filecontents = &HTML::Entities::encode($filecontents);
1.147     albertel 1148: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.274     albertel 1149:       my $xml_help = '';
                   1150:       if ($filetype eq 'html') {
                   1151: 	  $xml_help=Apache::loncommon::helpLatexCheatsheet();
                   1152:       }
                   1153:       my $cleanbut = '';
                   1154:       if ($filetype eq 'html') {
1.280     www      1155: 	  $cleanbut='<input type="submit" name="attemptclean" value="'.
                   1156: 	      &mt('Save and then attempt to clean HTML').'" />';
1.274     albertel 1157:       }
1.254     albertel 1158:       my $titledisplay=&display_title();
1.280     www      1159:       my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
                   1160: 					 'vi' => 'View',
                   1161: 					 'ed' => 'Edit');
1.161     albertel 1162:       my $buttons=(<<BUTTONS);
1.274     albertel 1163: $cleanbut
1.304     matthew  1164: <input type="submit" name="savethisfile" accesskey="s"  value="$lt{'st'}" />
                   1165: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1.161     albertel 1166: BUTTONS
1.78      www      1167:       my $editfooter=(<<ENDFOOTER);
                   1168: <hr />
                   1169: <a name="editsection" />
                   1170: <form method="post">
1.240     albertel 1171: $xml_help
1.280     www      1172: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1.170     www      1173: $buttons<br />
1.78      www      1174: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1.170     www      1175: <br />$buttons
1.78      www      1176: <br />
                   1177: </form>
1.254     albertel 1178: $titledisplay
1.78      www      1179: ENDFOOTER
1.147     albertel 1180: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1181:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1182:       return $result;
                   1183: }
                   1184: 
1.152     albertel 1185: sub get_target {
                   1186:   my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                   1187:   if ( $ENV{'request.state'} eq 'published') {
                   1188:     if ( defined($ENV{'form.grade_target'})
                   1189: 	 && ($viewgrades == 'F' )) {
                   1190:       return ($ENV{'form.grade_target'});
1.153     albertel 1191:     } elsif (defined($ENV{'form.grade_target'})) {
                   1192:       if (($ENV{'form.grade_target'} eq 'web') ||
                   1193: 	  ($ENV{'form.grade_target'} eq 'tex') ) {
                   1194: 	return $ENV{'form.grade_target'}
                   1195:       } else {
                   1196: 	return 'web';
                   1197:       }
1.152     albertel 1198:     } else {
                   1199:       return 'web';
                   1200:     }
                   1201:   } elsif ($ENV{'request.state'} eq 'construct') {
                   1202:     if ( defined($ENV{'form.grade_target'})) {
                   1203:       return ($ENV{'form.grade_target'});
                   1204:     } else {
                   1205:       return 'web';
                   1206:     }
                   1207:   } else {
                   1208:     return 'web';
                   1209:   }
                   1210: }
                   1211: 
1.24      sakharuk 1212: sub handler {
1.255     sakharuk 1213:     my $request=shift;
                   1214:     
                   1215:     my $target=&get_target();
                   1216:     
1.258     albertel 1217:     $Apache::lonxml::debug=$ENV{'user.debug'};
1.255     sakharuk 1218:     
                   1219:     if ($ENV{'browser.mathml'}) {
1.280     www      1220: 	&Apache::loncommon::content_type($request,'text/xml');
1.255     sakharuk 1221:     } else {
1.280     www      1222: 	&Apache::loncommon::content_type($request,'text/html');
1.255     sakharuk 1223:     }
                   1224:     &Apache::loncommon::no_cache($request);
                   1225:     $request->send_http_header;
                   1226:     
                   1227:     return OK if $request->header_only;
1.68      www      1228: 
                   1229: 
1.255     sakharuk 1230:     my $file=&Apache::lonnet::filelocation("",$request->uri);
1.274     albertel 1231:     my $filetype;
                   1232:     if ($file =~ /\.sty$/) {
                   1233: 	$filetype='sty';
                   1234:     } else {
                   1235: 	$filetype='html';
                   1236:     }
1.78      www      1237: #
                   1238: # Edit action? Save file.
                   1239: #
1.255     sakharuk 1240:     unless ($ENV{'request.state'} eq 'published') {
                   1241: 	if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1.271     www      1242: 	    if (&storefile($file,$ENV{'form.filecont'})) {
1.309     albertel 1243: 		&Apache::lonxml::info("<font COLOR=\"#0000FF\">".
                   1244: 				      &mt('Updated').": ".
                   1245: 				      &Apache::lonlocal::locallocaltime(time).
                   1246: 				      " </font>");
1.271     www      1247: 	    } 
1.255     sakharuk 1248: 	}
                   1249:     }
                   1250:     my %mystyle;
                   1251:     my $result = '';
                   1252:     my $filecontents=&Apache::lonnet::getfile($file);
                   1253:     if ($filecontents eq -1) {
1.284     www      1254: 	my $bodytag=&Apache::loncommon::bodytag('File Error');
                   1255: 	my $fnf=&mt('File not found');
1.255     sakharuk 1256: 	$result=(<<ENDNOTFOUND);
1.78      www      1257: <html>
                   1258: <head>
1.284     www      1259: <title>$fnf</title>
1.78      www      1260: </head>
1.284     www      1261: $bodytag
                   1262: <b>$fnf: $file</b>
1.78      www      1263: </body>
                   1264: </html>
                   1265: ENDNOTFOUND
1.50      albertel 1266:     $filecontents='';
1.255     sakharuk 1267: 	if ($ENV{'request.state'} ne 'published') {
1.274     albertel 1268: 	    if ($filetype eq 'sty') {
                   1269: 		$filecontents=&createnewsty();
                   1270: 	    } else {
                   1271: 		$filecontents=&createnewhtml();
                   1272: 	    }
1.255     sakharuk 1273: 	    $ENV{'form.editmode'}='Edit'; #force edit mode
                   1274: 	}
                   1275:     } else {
                   1276: 	unless ($ENV{'request.state'} eq 'published') {
                   1277: 	    if ($ENV{'form.attemptclean'}) {
                   1278: 		$filecontents=&htmlclean($filecontents,1);
                   1279: 	    }
1.264     www      1280: #
                   1281: # we are in construction space, see if edit mode forced
                   1282:             &Apache::loncommon::get_unprocessed_cgi
                   1283:                           ($ENV{'QUERY_STRING'},['editmode']);
1.255     sakharuk 1284: 	}
                   1285: 	if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
                   1286: 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1287: 						'',%mystyle);
                   1288: 	}
1.147     albertel 1289:     }
1.255     sakharuk 1290:     
1.78      www      1291: #
                   1292: # Edit action? Insert editing commands
                   1293: #
1.255     sakharuk 1294:     unless ($ENV{'request.state'} eq 'published') {
                   1295: 	if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
                   1296: 	    my $displayfile=$request->uri;
                   1297: 	    $displayfile=~s/^\/[^\/]*//;
1.309     albertel 1298: 	    $result='<html><body bgcolor="#FFFFFF">'.
                   1299: 		&Apache::lonxml::message_location().'<h3>'.
                   1300: 		$displayfile.
1.255     sakharuk 1301: 		'</h3></body></html>';
1.274     albertel 1302: 	    $result=&inserteditinfo($result,$filecontents,$filetype);
1.255     sakharuk 1303: 	}
1.147     albertel 1304:     }
1.274     albertel 1305:     if ($filetype eq 'html') { writeallows($request->uri); }
                   1306: 	
1.255     sakharuk 1307:     
1.309     albertel 1308:     &Apache::lonxml::add_messages(\$result);
1.255     sakharuk 1309:     $request->print($result);
                   1310:     
                   1311:     return OK;
1.253     albertel 1312: }
                   1313: 
                   1314: sub display_title {
                   1315:     my $result;
                   1316:     if ($ENV{'request.state'} eq 'construct') {
                   1317: 	my $title=&Apache::lonnet::gettitle();
                   1318: 	if (!defined($title) || $title eq '') {
                   1319: 	    $title = $ENV{'request.filename'};
                   1320: 	    $title = substr($title, rindex($title, '/') + 1);
                   1321: 	}
                   1322: 	$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
                   1323:     }
                   1324:     return $result;
1.24      sakharuk 1325: }
1.147     albertel 1326: 
1.22      albertel 1327: sub debug {
1.298     albertel 1328:     if ($Apache::lonxml::debug eq "1") {
                   1329: 	$|=1;
1.300     albertel 1330: 	my $request=$Apache::lonxml::request;
                   1331: 	if (!$request) { $request=Apache->request; }
                   1332: 	$request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1.298     albertel 1333:     }
1.22      albertel 1334: }
1.49      albertel 1335: 
1.22      albertel 1336: sub error {
1.205     www      1337:   $errorcount++;
1.300     albertel 1338:   my $request=$Apache::lonxml::request;
                   1339:   if (!$request) { $request=Apache->request; }
1.74      albertel 1340:   if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1.166     matthew  1341:     # If printing in construction space, put the error inside <pre></pre>
1.309     albertel 1342:       push(@Apache::lonxml::error_messages,
                   1343: 	   $Apache::lonxml::warnings_error_header.
                   1344: 	   "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1.295     albertel 1345:       $Apache::lonxml::warnings_error_header='';
1.52      albertel 1346:   } else {
1.309     albertel 1347:       push(@Apache::lonxml::error_messages,
                   1348: 	   "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />");
1.52      albertel 1349:     #notify author
1.146     albertel 1350:     &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1.52      albertel 1351:     #notify course
                   1352:     if ( $ENV{'request.course.id'} ) {
1.209     www      1353:       my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1.143     www      1354:       my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1.209     www      1355:       foreach (keys %users) {
                   1356: 	my ($user,$domain) = split(/:/, $_);
1.143     www      1357: 	&Apache::lonmsg::user_normal_msg($user,$domain,
1.146     albertel 1358:         "Error [$declutter]",join('<br />',@_));
1.52      albertel 1359:       }
                   1360:     }
                   1361:   }
1.22      albertel 1362: }
1.49      albertel 1363: 
1.22      albertel 1364: sub warning {
1.295     albertel 1365:     $warningcount++;
1.261     albertel 1366:   
1.295     albertel 1367:     if ($ENV{'form.grade_target'} ne 'tex') {
                   1368: 	if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1.300     albertel 1369: 	    my $request=$Apache::lonxml::request;
                   1370: 	    if (!$request) { $request=Apache->request; }
1.309     albertel 1371: 	    push(@Apache::lonxml::warning_messages,
                   1372: 		 $Apache::lonxml::warnings_error_header.
                   1373: 		 "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1.295     albertel 1374: 	    $Apache::lonxml::warnings_error_header='';
                   1375: 	}
                   1376:     }
1.309     albertel 1377: }
                   1378: 
                   1379: sub info {
                   1380:     if ($ENV{'form.grade_target'} ne 'tex' 
                   1381: 	&& $ENV{'request.state'} eq 'construct') {
                   1382: 	push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
                   1383:     }
                   1384: }
                   1385: 
                   1386: sub message_location {
                   1387:     return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
                   1388: }
                   1389: 
                   1390: sub add_messages {
                   1391:     my ($msg)=@_;
                   1392:     my $result=join(' ',
                   1393: 		    @Apache::lonxml::info_messages,
                   1394: 		    @Apache::lonxml::error_messages,
                   1395: 		    @Apache::lonxml::warning_messages);
                   1396:     undef(@Apache::lonxml::info_messages);
                   1397:     undef(@Apache::lonxml::error_messages);
                   1398:     undef(@Apache::lonxml::warning_messages);
                   1399:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
                   1400:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1.83      albertel 1401: }
                   1402: 
                   1403: sub get_param {
1.213     albertel 1404:     my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
                   1405:     if ( ! $context ) { $context = -1; }
                   1406:     my $args ='';
                   1407:     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1408:     if ( ! $Apache::lonxml::usestyle ) {
                   1409: 	$args=$Apache::lonxml::style_values.$args;
                   1410:     }
1.213     albertel 1411:     if ( ! $args ) { return undef; }
                   1412:     if ( $case_insensitive ) {
                   1413: 	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
                   1414: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1415:                                      $safeeval); #'
                   1416: 	} else {
                   1417: 	    return undef;
                   1418: 	}
                   1419:     } else {
                   1420: 	if ( $args =~ /my \$\Q$param\E=\"/ ) {
                   1421: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1422:                                      $safeeval); #'
                   1423: 	} else {
                   1424: 	    return undef;
                   1425: 	}
                   1426:     }
1.22      albertel 1427: }
                   1428: 
1.132     albertel 1429: sub get_param_var {
1.213     albertel 1430:   my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1.132     albertel 1431:   if ( ! $context ) { $context = -1; }
                   1432:   my $args ='';
                   1433:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1434:   if ( ! $Apache::lonxml::usestyle ) {
                   1435:       $args=$Apache::lonxml::style_values.$args;
                   1436:   }
1.230     albertel 1437:   &Apache::lonxml::debug("Args are $args param is $param");
1.213     albertel 1438:   if ($case_insensitive) {
                   1439:       if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
                   1440: 	  return undef;
                   1441:       }
                   1442:   } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1.132     albertel 1443:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.230     albertel 1444:   &Apache::lonxml::debug("first run is $value");
                   1445:   if ($value =~ /^[\$\@\%]\w+$/) {
                   1446:       &Apache::lonxml::debug("doing second");
                   1447:       my @result=&Apache::run::run("return $value",$safeeval,1);
                   1448:       if (!defined($result[0])) {
                   1449: 	  return $value
                   1450:       } else {
                   1451: 	  if (wantarray) { return @result; } else { return $result[0]; }
                   1452:       }
1.132     albertel 1453:   } else {
                   1454:     return $value;
                   1455:   }
                   1456: }
                   1457: 
1.74      albertel 1458: sub register_insert {
1.75      albertel 1459:   my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74      albertel 1460:   my $i;
1.76      albertel 1461:   my $tagnum=0;
1.74      albertel 1462:   my @order;
                   1463:   for ($i=0;$i < $#data; $i++) {
                   1464:     my $line = $data[$i];
                   1465:     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
                   1466:     if ( $line =~ /TABLE/ ) { last; }
1.268     bowersj2 1467:     my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1.135     albertel 1468:     if ($tag) {
                   1469:       $insertlist{"$tagnum.tag"} = $tag;
                   1470:       $insertlist{"$tagnum.description"} = $descrip;
                   1471:       $insertlist{"$tagnum.color"} = $color;
                   1472:       $insertlist{"$tagnum.function"} = $function;
                   1473:       if (!defined($show)) { $show='yes'; }
                   1474:       $insertlist{"$tagnum.show"}= $show;
1.268     bowersj2 1475:       $insertlist{"$tagnum.helpfile"} = $helpfile;
                   1476:       $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1.135     albertel 1477:       $insertlist{"$tag.num"}=$tagnum;
                   1478:       $tagnum++;
                   1479:     }
1.74      albertel 1480:   }
1.76      albertel 1481:   $i++; #skipping TABLE line
                   1482:   $tagnum = 0;
1.74      albertel 1483:   for (;$i < $#data;$i++) {
                   1484:     my $line = $data[$i];
1.76      albertel 1485:     my ($mnemonic,@which) = split(/ +/,$line);
                   1486:     my $tag = $insertlist{"$tagnum.tag"};
1.144     matthew  1487:     for (my $j=0;$j <=$#which;$j++) {
1.74      albertel 1488:       if ( $which[$j] eq 'Y' ) {
1.76      albertel 1489: 	if ($insertlist{"$j.show"} ne 'no') {
                   1490: 	  push(@{ $insertlist{"$tag.which"} },$j);
                   1491: 	}
1.74      albertel 1492:       }
                   1493:     }
1.76      albertel 1494:     $tagnum++;
1.74      albertel 1495:   }
                   1496: }
1.98      albertel 1497: 
                   1498: sub description {
                   1499:   my ($token)=@_;
1.138     albertel 1500:   my $tagnum;
                   1501:   my $tag=$token->[1];
                   1502:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1503:     my $testtag=$namespace.'::'.$tag;
                   1504:     $tagnum=$insertlist{"$testtag.num"};
                   1505:     if (defined($tagnum)) { last; }
                   1506:   }
                   1507:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1508:   return $insertlist{$tagnum.'.description'};
1.268     bowersj2 1509: }
                   1510: 
                   1511: # Returns a list containing the help file, and the description
                   1512: sub helpinfo {
                   1513:   my ($token)=@_;
                   1514:   my $tagnum;
                   1515:   my $tag=$token->[1];
                   1516:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1517:     my $testtag=$namespace.'::'.$tag;
                   1518:     $tagnum=$insertlist{"$testtag.num"};
                   1519:     if (defined($tagnum)) { last; }
                   1520:   }
                   1521:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1522:   return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1.98      albertel 1523: }
1.123     albertel 1524: 
                   1525: # ----------------------------------------------------------------- whichuser
                   1526: # returns a list of $symb, $courseid, $domain, $name that is correct for
                   1527: # calls to lonnet functions for this setup.
                   1528: # - looks for form.grade_ parameters
                   1529: sub whichuser {
1.262     matthew  1530:   my ($passedsymb)=@_;
1.245     albertel 1531:   my ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1532:   if (defined($ENV{'form.grade_symb'})) {
                   1533:     my $tmp_courseid=$ENV{'form.grade_courseid'};
1.269     albertel 1534:     my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1.123     albertel 1535:     if ($allowed) {
                   1536:       $symb=$ENV{'form.grade_symb'};
                   1537:       $courseid=$ENV{'form.grade_courseid'};
                   1538:       $domain=$ENV{'form.grade_domain'};
                   1539:       $name=$ENV{'form.grade_username'};
                   1540:     }
1.134     albertel 1541:   } else {
1.262     matthew  1542:       if (!$passedsymb) {
                   1543:           $symb=&Apache::lonnet::symbread();
                   1544:       } else {
                   1545:           $symb=$passedsymb;
                   1546:       }
1.244     albertel 1547:       $courseid=$ENV{'request.course.id'};
                   1548:       $domain=$ENV{'user.domain'};
                   1549:       $name=$ENV{'user.name'};
                   1550:       if ($name eq 'public' && $domain eq 'public') {
                   1551: 	  if (!defined($ENV{'form.username'})) {
                   1552: 	      $ENV{'form.username'}.=time.rand(10000000);
                   1553: 	  }
                   1554: 	  $name.=$ENV{'form.username'};
                   1555:       }
1.123     albertel 1556:   }
1.245     albertel 1557:   return ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1558: }
                   1559: 
1.1       sakharuk 1560: 1;
                   1561: __END__
1.68      www      1562: 
                   1563: 

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>