Annotation of loncom/xml/lonxml.pm, revision 1.330

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.330   ! albertel    4: # $Id: lonxml.pm,v 1.329 2004/07/13 18:13:46 sakharuk Exp $
1.139     www         5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
                     28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
                     29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
                     30: # binary executable programs or libraries distributed by the 
                     31: # Michigan State University (the "Licensee"), but any binaries so 
                     32: # distributed are hereby licensed only for use in the context
                     33: # of a program or computational system for which the Licensee is the 
                     34: # primary author or distributor, and which performs substantial 
                     35: # additional tasks beyond the translation of (La)TeX into HTML.
                     36: # The C source of the Code may not be distributed by the Licensee
                     37: # to any other parties under any circumstances.
                     38: #
1.316     albertel   39: 
1.2       sakharuk   40: 
1.4       albertel   41: package Apache::lonxml; 
1.33      www        42: use vars 
1.320     www        43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount @htmlareafields);
1.1       sakharuk   44: use strict;
1.167     albertel   45: use HTML::LCParser();
1.161     albertel   46: use HTML::TreeBuilder();
                     47: use HTML::Entities();
                     48: use Safe();
                     49: use Safe::Hole();
                     50: use Math::Cephes();
                     51: use Math::Random();
                     52: use Opcode();
1.271     www        53: use POSIX qw(strftime);
1.72      albertel   54: 
1.266     bowersj2   55: 
1.72      albertel   56: sub register {
1.141     albertel   57:   my ($space,@taglist) = @_;
                     58:   foreach my $temptag (@taglist) {
                     59:     push(@{ $Apache::lonxml::alltags{$temptag} },$space);
1.72      albertel   60:   }
                     61: }
                     62: 
1.141     albertel   63: sub deregister {
                     64:   my ($space,@taglist) = @_;
                     65:   foreach my $temptag (@taglist) {
                     66:     my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
                     67:     if ($tempspace eq $space) {
                     68:       pop(@{ $Apache::lonxml::alltags{$temptag} });
                     69:     }
                     70:   }
1.142     albertel   71:   #&printalltags();
1.141     albertel   72: }
                     73: 
1.46      www        74: use Apache::Constants qw(:common);
1.161     albertel   75: use Apache::lontexconvert();
                     76: use Apache::style();
                     77: use Apache::run();
                     78: use Apache::londefdef();
                     79: use Apache::scripttag();
1.285     www        80: use Apache::languagetags();
1.161     albertel   81: use Apache::edit();
1.266     bowersj2   82: use Apache::inputtags();
                     83: use Apache::outputtags();
1.161     albertel   84: use Apache::lonnet();
                     85: use Apache::File();
                     86: use Apache::loncommon();
1.198     www        87: use Apache::lonfeedback();
1.200     www        88: use Apache::lonmsg();
1.217     matthew    89: use Apache::loncacc();
1.280     www        90: use Apache::lonlocal;
1.79      www        91: 
1.72      albertel   92: #==================================================   Main subroutine: xmlparse  
                     93: #debugging control, to turn on debugging modify the correct handler
                     94: $Apache::lonxml::debug=0;
1.206     albertel   95: 
                     96: # keeps count of the number of warnings and errors generated in a parse
                     97: $warningcount=0;
                     98: $errorcount=0;
1.72      albertel   99: 
                    100: #path to the directory containing the file currently being processed
                    101: @pwd=();
                    102: 
                    103: #these two are used for capturing a subset of the output for later processing,
                    104: #don't touch them directly use &startredirection and &endredirection
                    105: @outputstack = ();
                    106: $redirection = 0;
                    107: 
                    108: #controls wheter the <import> tag actually does
                    109: $import = 1;
                    110: @extlinks=();
                    111: 
                    112: # meta mode is a bit weird only some output is to be turned off
                    113: #<output> tag turns metamode off (defined in londefdef.pm)
                    114: $metamode = 0;
                    115: 
                    116: # turns on and of run::evaluate actually derefencing var refs
                    117: $evaluate = 1;
1.7       albertel  118: 
1.74      albertel  119: # data structure for eidt mode, determines what tags can go into what other tags
                    120: %insertlist=();
1.68      www       121: 
1.99      albertel  122: # stores the list of active tag namespaces
1.76      albertel  123: @namespace=();
                    124: 
1.99      albertel  125: # has the dynamic menu been updated to know about this resource
                    126: $Apache::lonxml::registered=0;
                    127: 
1.172     albertel  128: # a pointer the the Apache request object
                    129: $Apache::lonxml::request='';
                    130: 
1.216     sakharuk  131: # a problem number counter, and check on ether it is used
1.237     sakharuk  132: $Apache::lonxml::counter=1;
1.204     albertel  133: $Apache::lonxml::counter_changed=0;
                    134: 
1.212     albertel  135: #internal check on whether to look at style defs
                    136: $Apache::lonxml::usestyle=1;
1.260     albertel  137: 
                    138: #locations used to store the parameter string for style substitutions
                    139: $Apache::lonxml::style_values='';
                    140: $Apache::lonxml::style_end_values='';
1.212     albertel  141: 
1.281     albertel  142: #array of ssi calls that need to occur after we are done parsing
                    143: @Apache::lonxml::ssi_info=();
                    144: 
1.282     albertel  145: #should we do the postag variable interpolation
                    146: $Apache::lonxml::post_evaluate=1;
                    147: 
1.295     albertel  148: #a header message to emit in the case of any generated warning or errors
                    149: $Apache::lonxml::warnings_error_header='';
                    150: 
1.68      www       151: sub xmlbegin {
                    152:   my $output='';
1.325     www       153:   @htmlareafields=();
1.68      www       154:   if ($ENV{'browser.mathml'}) {
                    155:       $output='<?xml version="1.0"?>'
                    156:             .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
                    157:             .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
                    158:             .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
                    159:             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
                    160: 		.'xmlns="http://www.w3.org/TR/REC-html40">';
                    161:   } else {
                    162:       $output='<html>';
                    163:   }
                    164:   return $output;
                    165: }
                    166: 
                    167: sub xmlend {
1.278     www       168:     my $mode='xml';
                    169:     my $status='OPEN';
                    170:     if ($Apache::lonhomework::parsing_a_problem) {
                    171: 	$mode='problem';
                    172: 	$status=$Apache::inputtags::status[-1]; 
                    173:     }
1.298     albertel  174:     return &Apache::lonfeedback::list_discussion($mode,$status).'</html>';
1.119     www       175: }
                    176: 
                    177: sub tokeninputfield {
1.120     www       178:     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
                    179:     $defhost=~tr/a-z/A-Z/;
1.119     www       180:     return (<<ENDINPUTFIELD)
1.226     albertel  181: <script type="text/javascript">
1.120     www       182:     function updatetoken() {
                    183: 	var comp=new Array;
                    184:         var barcode=unescape(document.tokeninput.barcode.value);
                    185:         comp=barcode.split('*');
                    186:         if (typeof(comp[0])!="undefined") {
                    187: 	    document.tokeninput.codeone.value=comp[0];
                    188: 	}
                    189:         if (typeof(comp[1])!="undefined") {
                    190: 	    document.tokeninput.codetwo.value=comp[1];
                    191: 	}
                    192:         if (typeof(comp[2])!="undefined") {
                    193:             comp[2]=comp[2].toUpperCase();
                    194: 	    document.tokeninput.codethree.value=comp[2];
                    195: 	}
                    196:         document.tokeninput.barcode.value='';
                    197:     }  
                    198: </script>
                    199: <form method="post" name="tokeninput">
1.119     www       200: <table border="2" bgcolor="#FFFFBB">
                    201: <tr><th>DocID Checkin</th></tr>
                    202: <tr><td>
                    203: <table>
                    204: <tr>
                    205: <td>Scan in Barcode</td>
1.120     www       206: <td><input type="text" size="22" name="barcode" 
                    207: onChange="updatetoken()"/></td>
1.119     www       208: </tr>
                    209: <tr><td><i>or</i> Type in DocID</td>
                    210: <td>
                    211: <input type="text" size="5" name="codeone" />
1.120     www       212: <b><font size="+2">*</font></b>
1.119     www       213: <input type="text" size="5" name="codetwo" />
1.120     www       214: <b><font size="+2">*</font></b>
                    215: <input type="text" size="10" name="codethree" value="$defhost" 
                    216: onChange="this.value=this.value.toUpperCase()" />
1.119     www       217: </td></tr>
                    218: </table>
                    219: </td></tr>
                    220: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
                    221: </table>
                    222: </form>
                    223: ENDINPUTFIELD
1.112     www       224: }
                    225: 
1.116     www       226: sub maketoken {
1.118     www       227:     my ($symb,$tuname,$tudom,$tcrsid)=@_;
1.112     www       228:     unless ($symb) {
                    229: 	$symb=&Apache::lonnet::symbread();
                    230:     }
                    231:     unless ($tuname) {
                    232: 	$tuname=$ENV{'user.name'};
                    233:         $tudom=$ENV{'user.domain'};
                    234:         $tcrsid=$ENV{'request.course.id'};
                    235:     }
1.116     www       236: 
1.118     www       237:     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
                    238: }
                    239: 
                    240: sub printtokenheader {
1.133     albertel  241:     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
1.116     www       242:     unless ($token) { return ''; }
1.118     www       243: 
1.133     albertel  244:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    245:     unless ($tsymb) {
                    246: 	$tsymb=$symb;
1.118     www       247:     }
                    248:     unless ($tuname) {
1.133     albertel  249: 	$tuname=$name;
                    250:         $tudom=$domain;
                    251:         $tcrsid=$courseid;
1.118     www       252:     }
1.114     www       253: 
                    254:     my %reply=&Apache::lonnet::get('environment',
                    255:               ['firstname','middlename','lastname','generation'],
                    256:               $tudom,$tuname);
                    257:     my $plainname=$reply{'firstname'}.' '. 
                    258:                   $reply{'middlename'}.' '.
                    259:                   $reply{'lastname'}.' '.
                    260: 		  $reply{'generation'};
                    261: 
1.112     www       262:     if ($target eq 'web') {
1.145     www       263:         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
1.115     www       264: 	return 
1.221     albertel  265:  '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
1.284     www       266:                &mt('Checked out for').' '.$plainname.
                    267:                '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
                    268: 	       '<br />'.&mt('ID').': '.$idhash{$tuname}.
                    269: 	       '<br />'.&mt('CourseID').': '.$tcrsid.
                    270: 	       '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
                    271:                '<br />'.&mt('DocID').': '.$token.
                    272:                '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
1.112     www       273:     } else {
1.121     albertel  274:         return $token;
1.112     www       275:     }
1.68      www       276: }
                    277: 
1.70      www       278: sub fontsettings() {
                    279:     my $headerstring='';
                    280:     if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 
1.248     albertel  281: 	$headerstring.=
                    282: 	    '<meta Content-Type="text/html; charset=x-mac-roman">';
1.263     albertel  283:     } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
1.248     albertel  284: 	$headerstring.=
                    285: 	    '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
1.70      www       286:     }
                    287:     return $headerstring;
1.68      www       288: }
                    289: 
1.48      albertel  290: sub printalltags {
                    291:   my $temp;
                    292:   foreach $temp (sort keys %Apache::lonxml::alltags) {
1.141     albertel  293:     &Apache::lonxml::debug("$temp -- ".
                    294: 		  join(',',@{ $Apache::lonxml::alltags{$temp} }));
1.48      albertel  295:   }
                    296: }
1.31      sakharuk  297: 
1.3       sakharuk  298: sub xmlparse {
1.172     albertel  299:  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96      albertel  300: 
1.172     albertel  301:  &setup_globals($request,$target);
1.232     albertel  302:  &Apache::inputtags::initialize_inputtags();
                    303:  &Apache::outputtags::initialize_outputtags();
                    304:  &Apache::edit::initialize_edit();
1.287     albertel  305:  &Apache::londefdef::initialize_londefdef();
1.244     albertel  306: 
1.178     www       307: #
                    308: # do we have a course style file?
                    309: #
                    310: 
1.208     albertel  311:  if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
1.178     www       312:      my $bodytext=
                    313: 	 $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
                    314:      if ($bodytext) {
                    315:        my $location=&Apache::lonnet::filelocation('',$bodytext);
                    316:        my $styletext=&Apache::lonnet::getfile($location);
                    317:        if ($styletext ne '-1') {
                    318:           %style_for_target = (%style_for_target,
                    319:                           &Apache::style::styleparser($target,$styletext));
                    320:        }
                    321:     }
1.292     sakharuk  322:  } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
                    323:      my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
1.291     sakharuk  324:      my $styletext=&Apache::lonnet::getfile($location);
                    325:        if ($styletext ne '-1') {
                    326:           %style_for_target = (%style_for_target,
                    327:                           &Apache::style::styleparser($target,$styletext));
                    328:       }
1.178     www       329:  }
1.255     sakharuk  330: #&printalltags();
1.16      albertel  331:  my @pars = ();
1.23      albertel  332:  my $pwd=$ENV{'request.filename'};
                    333:  $pwd =~ s:/[^/]*$::;
                    334:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  335: 
1.3       sakharuk  336:  my $safeeval = new Safe;
1.40      albertel  337:  my $safehole = new Safe::Hole;
1.82      ng        338:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  339: #-------------------- Redefinition of the target in the case of compound target
                    340: 
                    341:  ($target, my @tenta) = split('&&',$target);
                    342: 
1.150     albertel  343:  my @stack = ();
1.3       sakharuk  344:  my @parstack = ();
1.17      albertel  345:  &initdepth;
1.67      www       346: 
1.101     albertel  347:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
                    348: 				   $safeeval,\%style_for_target);
1.255     sakharuk  349: 
1.125     www       350:  if ($ENV{'request.uri'}) {
                    351:     &writeallows($ENV{'request.uri'});
                    352:  }
1.281     albertel  353:  &do_registered_ssi();
1.204     albertel  354:  if ($Apache::lonxml::counter_changed) { &store_counter() }
1.3       sakharuk  355:  return $finaloutput;
1.106     www       356: }
                    357: 
                    358: sub htmlclean {
1.107     www       359:     my ($raw,$full)=@_;
1.106     www       360: 
                    361:     my $tree = HTML::TreeBuilder->new;
                    362:     $tree->ignore_unknown(0);
1.140     albertel  363: 
1.106     www       364:     $tree->parse($raw);
                    365: 
1.107     www       366:     my $output= $tree->as_HTML(undef,' ');
1.140     albertel  367: 
1.161     albertel  368:     $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
1.111     www       369:     $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
1.107     www       370:     unless ($full) {
                    371:        $output=~s/\<[\/]*(body|head|html)\>//gis;
                    372:     }
1.106     www       373: 
                    374:     $tree = $tree->delete;
                    375: 
                    376:     return $output;
1.15      albertel  377: }
                    378: 
1.191     albertel  379: sub latex_special_symbols {
1.272     albertel  380:     my ($string,$where)=@_;
1.235     sakharuk  381:     if ($where eq 'header') {
1.272     albertel  382: 	$string =~ s/(\\|_|\^)/ /g;
1.311     albertel  383: 	$string =~ s/(\$|%|\{|\})/\\$1/g;
1.273     sakharuk  384: 	$string =~ s/_/ /g;
1.311     albertel  385: 	$string=&Apache::lonprintout::character_chart($string);
                    386: 	# any & or # leftover should be safe to just escape
                    387:         $string=~s/([^\\])\&/$1\\\&/g;
                    388:         $string=~s/([^\\])\#/$1\\\#/g;
1.229     sakharuk  389:     } else {
1.312     albertel  390: 	$string=~s/\\/\\ensuremath{\\backslash}/g;
1.313     albertel  391: 	$string=~s/([^\\]|^)\%/$1\\\%/g;
1.329     sakharuk  392: 	$string=~s/([^\\]|^)\$/$1\\\$/g;
                    393: 	$string=~s/([^\\])\_/$1\\_/g;
1.310     sakharuk  394: 	$string=~s/\$\$/\$\\\$/g;
1.329     sakharuk  395: 	$string=~s/\_\_/\_\\\_/g;
1.310     sakharuk  396: 	$string=~s/\#\#/\#\\\#/g;
1.313     albertel  397:         $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
1.310     sakharuk  398: 	$string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
1.311     albertel  399: 	$string=&Apache::lonprintout::character_chart($string);
                    400: 	# any & or # leftover should be safe to just escape
1.313     albertel  401:         $string=~s/([^\\]|^)\&/$1\\\&/g;
                    402:         $string=~s/([^\\]|^)\#/$1\\\#/g;
1.310     sakharuk  403: #single { or } How to escape?
1.229     sakharuk  404:     }
1.272     albertel  405:     return $string;
1.188     sakharuk  406: }
                    407: 
1.101     albertel  408: sub inner_xmlparse {
                    409:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
                    410:   my $finaloutput = '';
                    411:   my $result;
                    412:   my $token;
1.258     albertel  413:   my $dontpop=0;
1.101     albertel  414:   while ( $#$pars > -1 ) {
                    415:     while ($token = $$pars['-1']->get_token) {
1.261     albertel  416:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
1.101     albertel  417: 	if ($metamode<1) {
1.190     albertel  418: 	    my $text=$token->[1];
1.193     albertel  419: 	    if ($token->[0] eq 'C' && $target eq 'tex') {
1.239     sakharuk  420: 		$text = '';
                    421: #		$text = '%'.$text."\n";
1.182     sakharuk  422: 	    }
1.190     albertel  423: 	    $result.=$text;
1.101     albertel  424: 	}
1.261     albertel  425:       } elsif (($token->[0] eq 'D')) {
                    426: 	if ($metamode<1 && $target eq 'web') {
                    427: 	    my $text=$token->[1];
                    428: 	    $result.=$text;
                    429: 	}
1.101     albertel  430:       } elsif ($token->[0] eq 'PI') {
1.261     albertel  431: 	if ($metamode<1 && $target eq 'web') {
1.101     albertel  432: 	  $result=$token->[2];
                    433: 	}
                    434:       } elsif ($token->[0] eq 'S') {
1.140     albertel  435: 	# add tag to stack
1.101     albertel  436: 	push (@$stack,$token->[1]);
                    437: 	# add parameters list to another stack
                    438: 	push (@$parstack,&parstring($token));
1.140     albertel  439: 	&increasedepth($token);
1.212     albertel  440: 	if ($Apache::lonxml::usestyle &&
                    441: 	    exists($$style_for_target{$token->[1]})) {
                    442: 	    $Apache::lonxml::usestyle=0;
                    443: 	    my $string=$$style_for_target{$token->[1]}.
                    444: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    445: 	    &Apache::lonxml::newparser($pars,\$string);
1.257     albertel  446: 	    $Apache::lonxml::style_values=$$parstack[-1];
1.259     albertel  447: 	    $Apache::lonxml::style_end_values=$$parstack[-1];
1.101     albertel  448: 	} else {
                    449: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    450: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  451: 	}
1.101     albertel  452:       } elsif ($token->[0] eq 'E') {
1.212     albertel  453: 	if ($Apache::lonxml::usestyle &&
                    454: 	    exists($$style_for_target{'/'."$token->[1]"})) {
                    455: 	    $Apache::lonxml::usestyle=0;
                    456: 	    my $string=$$style_for_target{'/'.$token->[1]}.
1.258     albertel  457: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
1.212     albertel  458: 	    &Apache::lonxml::newparser($pars,\$string);
1.259     albertel  459: 	    $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
                    460: 	    $Apache::lonxml::style_end_values='';
1.258     albertel  461: 	    $dontpop=1;
1.101     albertel  462: 	} else {
1.258     albertel  463: 	    #clear out any tags that didn't end
                    464: 	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
                    465: 		my $lasttag=$$stack[-1];
1.317     albertel  466: 		if ($token->[1] =~ /^\Q$lasttag\E$/i) {
1.258     albertel  467: 		    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' as end tag to &lt;'.$$stack[-1].'&gt;');
                    468: 		    last;
                    469: 		} else {
                    470: 		    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' when looking for &lt;/'.$$stack[-1].'&gt; in file');
                    471: 		    &end_tag($stack,$parstack,$token);
                    472: 		}
                    473: 	    }
                    474: 	    $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    475: 			       $parstack, $pars,$safeeval, $style_for_target);
1.101     albertel  476: 	}
                    477:       } else {
                    478: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    479:       }
                    480:       #evaluate variable refs in result
1.282     albertel  481:       if ($Apache::lonxml::post_evaluate &&$result ne "") {
1.257     albertel  482: 	  my $extras;
                    483: 	  if (!$Apache::lonxml::usestyle) {
                    484: 	      $extras=$Apache::lonxml::style_values;
                    485: 	  }
1.101     albertel  486: 	if ( $#$parstack > -1 ) {
1.257     albertel  487: 	  $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
1.101     albertel  488: 	} else {
1.257     albertel  489: 	  $result= &Apache::run::evaluate($result,$safeeval,$extras);
1.101     albertel  490: 	}
1.163     albertel  491:       }
1.282     albertel  492:       $Apache::lonxml::post_evaluate=1;
                    493: 
1.190     albertel  494:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.249     albertel  495: 	  #Style file definitions should be correct
1.250     albertel  496: 	  if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
1.311     albertel  497: 	      $result=&latex_special_symbols($result);
1.249     albertel  498: 	  }
1.190     albertel  499:       }
                    500: 
1.169     albertel  501:       if ($Apache::lonxml::redirection) {
                    502: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    503:       } else {
                    504: 	$finaloutput.=$result;
                    505:       }
                    506:       $result = '';
                    507: 
1.258     albertel  508:       if ($token->[0] eq 'E' && !$dontpop) {
1.101     albertel  509: 	&end_tag($stack,$parstack,$token);
                    510:       }
1.258     albertel  511:       $dontpop=0;
1.224     albertel  512:     }	
1.212     albertel  513:     if ($#$pars > -1) {
                    514: 	pop @$pars;
                    515: 	pop @Apache::lonxml::pwd;
                    516:     }
1.101     albertel  517:   }
                    518: 
                    519:   # if ($target eq 'meta') {
                    520:   #   $finaloutput.=&endredirection;
                    521:   # }
                    522: 
1.169     albertel  523: 
1.101     albertel  524:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    525:     $finaloutput=&afterburn($finaloutput);
1.216     sakharuk  526:   }	    
1.101     albertel  527:   return $finaloutput;
                    528: }
1.67      www       529: 
1.318     matthew   530: ## 
                    531: ## Looks to see if there is a subroutine defined for this tag.  If so, call it,
                    532: ## otherwise do not call it as we do not know what it is.
                    533: ##
1.7       albertel  534: sub callsub {
1.84      albertel  535:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  536:   my $currentstring='';
1.72      albertel  537:   my $nodefault;
1.7       albertel  538:   {
1.59      albertel  539:     my $sub1;
1.7       albertel  540:     no strict 'refs';
1.68      www       541:     my $tag=$token->[1];
1.236     www       542: # get utterly rid of extended html tags
                    543:     if ($tag=~/^x\-/i) { return ''; }
1.141     albertel  544:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       545:     if (!$space) {
1.141     albertel  546:      	$tag=~tr/A-Z/a-z/;
1.68      www       547: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  548: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       549:     }
1.97      albertel  550: 
                    551:     my $deleted=0;
                    552:     $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
                    553:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    554:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    555: 					     $parstack,$parser,$safeeval,
                    556: 					     $style);
                    557:     }
                    558:     if (!$deleted) {
                    559:       if ($space) {
1.220     albertel  560: 	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  561: 	$sub1="$space\:\:$sub";
                    562: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    563: 					     $parstack,$parser,$safeeval,
                    564: 					     $style);
                    565:       } else {
1.318     matthew   566:           if ($target eq 'tex') {
                    567:               # throw away tag name
                    568:               return '';
                    569:           }
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;
1.325     www       610:   @Apache::lonxml::htmlareafields=();
1.205     www       611:   $errorcount=0;
                    612:   $warningcount=0;
1.207     albertel  613:   $Apache::lonxml::default_homework_loaded=0;
1.212     albertel  614:   $Apache::lonxml::usestyle=1;
1.204     albertel  615:   &init_counter();
1.101     albertel  616:   @Apache::lonxml::pwd=();
1.124     albertel  617:   @Apache::lonxml::extlinks=();
1.281     albertel  618:   @Apache::lonxml::ssi_info=();
1.282     albertel  619:   $Apache::lonxml::post_evaluate=1;
1.295     albertel  620:   $Apache::lonxml::warnings_error_header='';
1.96      albertel  621:   if ($target eq 'meta') {
                    622:     $Apache::lonxml::redirection = 0;
                    623:     $Apache::lonxml::metamode = 1;
                    624:     $Apache::lonxml::evaluate = 1;
                    625:     $Apache::lonxml::import = 0;
1.129     albertel  626:   } elsif ($target eq 'answer') {
                    627:     $Apache::lonxml::redirection = 0;
                    628:     $Apache::lonxml::metamode = 1;
                    629:     $Apache::lonxml::evaluate = 1;
                    630:     $Apache::lonxml::import = 1;
1.96      albertel  631:   } elsif ($target eq 'grade') {
                    632:     &startredirection;
                    633:     $Apache::lonxml::metamode = 0;
                    634:     $Apache::lonxml::evaluate = 1;
                    635:     $Apache::lonxml::import = 1;
                    636:   } elsif ($target eq 'modified') {
                    637:     $Apache::lonxml::redirection = 0;
                    638:     $Apache::lonxml::metamode = 0;
                    639:     $Apache::lonxml::evaluate = 0;
                    640:     $Apache::lonxml::import = 0;
                    641:   } elsif ($target eq 'edit') {
                    642:     $Apache::lonxml::redirection = 0;
                    643:     $Apache::lonxml::metamode = 0;
                    644:     $Apache::lonxml::evaluate = 0;
                    645:     $Apache::lonxml::import = 0;
1.163     albertel  646:   } elsif ($target eq 'analyze') {
                    647:     $Apache::lonxml::redirection = 0;
                    648:     $Apache::lonxml::metamode = 0;
                    649:     $Apache::lonxml::evaluate = 1;
                    650:     $Apache::lonxml::import = 1;
1.96      albertel  651:   } else {
                    652:     $Apache::lonxml::redirection = 0;
                    653:     $Apache::lonxml::metamode = 0;
                    654:     $Apache::lonxml::evaluate = 1;
                    655:     $Apache::lonxml::import = 1;
                    656:   }
                    657: }
                    658: 
1.82      ng        659: sub init_safespace {
                    660:   my ($target,$safeeval,$safehole,$safeinit) = @_;
                    661:   $safeeval->permit("entereval");
                    662:   $safeeval->permit(":base_math");
                    663:   $safeeval->permit("sort");
1.286     albertel  664:   $safeeval->permit("time");
1.82      ng        665:   $safeeval->deny(":base_io");
1.102     albertel  666:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.251     albertel  667:   $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
1.82      ng        668:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
1.324     albertel  669:   $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
                    670: 		  '&chem_standard_order');
                    671: 
1.82      ng        672:   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
                    673:   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
                    674:   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
                    675:   $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
                    676:   $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
                    677:   $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
                    678:   $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
                    679:   $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
                    680:   $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
                    681:   $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
                    682:   $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
                    683:   $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
                    684:   $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
                    685:   $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
                    686:   $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
                    687:   $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
                    688:   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
                    689:   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
                    690:   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.215     albertel  691:   
                    692:   $safehole->wrap(\&Math::Cephes::bdtr  ,$safeeval,'&bdtr'  );
                    693:   $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
                    694:   $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
                    695:   $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
                    696:   $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
                    697:   $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
                    698:   $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
                    699:   $safehole->wrap(\&Math::Cephes::fdtr  ,$safeeval,'&fdtr'  );
                    700:   $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
                    701:   $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
                    702:   $safehole->wrap(\&Math::Cephes::gdtr  ,$safeeval,'&gdtr'  );
                    703:   $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
                    704:   $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
                    705:   $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
                    706:   $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
                    707:   $safehole->wrap(\&Math::Cephes::ndtr  ,$safeeval,'&ndtr'  );
                    708:   $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
                    709:   $safehole->wrap(\&Math::Cephes::pdtr  ,$safeeval,'&pdtr'  );
                    710:   $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
                    711:   $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
                    712:   $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
                    713:   $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
                    714: 
                    715: #  $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
                    716: #  $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
                    717: #  $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
                    718: #  $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
                    719: #  $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
                    720: #  $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
                    721: 
1.91      ng        722:   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
                    723:   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
                    724:   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
                    725:   $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
                    726:   $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
                    727:   $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
                    728:   $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
                    729:   $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
                    730:   $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
                    731:   $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
                    732:   $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93      ng        733:   $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91      ng        734:   $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
                    735:   $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
                    736:   $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
                    737:   $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
                    738:   $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
                    739:   $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
                    740:   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
                    741:   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
                    742:   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
1.305     albertel  743:   $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
1.311     albertel  744:   $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
1.322     albertel  745:   $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
1.91      ng        746: 
1.82      ng        747: #need to inspect this class of ops
                    748: # $safeeval->deny(":base_orig");
1.91      ng        749:   $safeinit .= ';$external::target="'.$target.'";';
1.121     albertel  750:   my $rndseed;
1.123     albertel  751:   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    752:   $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
1.319     albertel  753:   $safeinit .= ';$external::randomseed="'.$rndseed.'";';
1.249     albertel  754:   &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.82      ng        755:   &Apache::run::run($safeinit,$safeeval);
1.303     albertel  756: 
1.207     albertel  757: }
                    758: 
                    759: sub default_homework_load {
                    760:     my ($safeeval)=@_;
                    761:     &Apache::lonxml::debug('Loading default_homework');
                    762:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1.241     albertel  763:     if ($default eq -1) {
1.207     albertel  764: 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
                    765:     } else {
                    766: 	&Apache::run::run($default,$safeeval);
                    767: 	$Apache::lonxml::default_homework_loaded=1;
                    768:     }
1.17      albertel  769: }
                    770: 
1.328     albertel  771: my $metamode_was;
1.55      albertel  772: sub startredirection {
1.328     albertel  773:     if (!$Apache::lonxml::redirection) {
                    774: 	$metamode_was=$Apache::lonxml::metamode;
                    775:     }
                    776:     $Apache::lonxml::metamode=0;
                    777:     $Apache::lonxml::redirection++;
                    778:     push (@Apache::lonxml::outputstack, '');
1.55      albertel  779: }
                    780: 
                    781: sub endredirection {
1.328     albertel  782:     if (!$Apache::lonxml::redirection) {
                    783: 	&Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
                    784: 	return '';
                    785:     }
                    786:     $Apache::lonxml::redirection--;
                    787:     if (!$Apache::lonxml::redirection) {
                    788: 	$Apache::lonxml::metamode=$metamode_was;
                    789:     }
                    790:     pop @Apache::lonxml::outputstack;
1.97      albertel  791: }
                    792: 
                    793: sub end_tag {
                    794:   my ($tagstack,$parstack,$token)=@_;
                    795:   pop(@$tagstack);
                    796:   pop(@$parstack);
                    797:   &decreasedepth($token);
1.55      albertel  798: }
                    799: 
1.17      albertel  800: sub initdepth {
                    801:   @Apache::lonxml::depthcounter=();
                    802:   $Apache::lonxml::depth=-1;
                    803:   $Apache::lonxml::olddepth=-1;
                    804: }
                    805: 
                    806: sub increasedepth {
1.19      albertel  807:   my ($token) = @_;
1.17      albertel  808:   $Apache::lonxml::depth++;
                    809:   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
                    810:   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
                    811:     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
                    812:   }
1.42      albertel  813:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  814:   &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54      albertel  815: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  816: }
                    817: 
                    818: sub decreasedepth {
1.19      albertel  819:   my ($token) = @_;
1.17      albertel  820:   $Apache::lonxml::depth--;
1.36      albertel  821:   if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
                    822:     $#Apache::lonxml::depthcounter--;
                    823:     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
                    824:   }
1.43      albertel  825:   if (  $Apache::lonxml::depth < -1) {
1.280     www       826:     &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1.43      albertel  827:     $Apache::lonxml::depth='-1';
                    828:   }
1.42      albertel  829:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  830:   &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54      albertel  831: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  832: }
1.19      albertel  833: 
1.180     albertel  834: sub get_all_text_unbalanced {
1.190     albertel  835: #there is a copy of this in lonpublisher.pm
1.326     albertel  836:     my($tag,$pars)= @_;
                    837:     my $token;
                    838:     my $result='';
                    839:     $tag='<'.$tag.'>';
                    840:     while ($token = $$pars[-1]->get_token) {
                    841: 	if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    842: 	    $result.=$token->[1];
                    843: 	} elsif ($token->[0] eq 'PI') {
                    844: 	    $result.=$token->[2];
                    845: 	} elsif ($token->[0] eq 'S') {
                    846: 	    $result.=$token->[4];
                    847: 	} elsif ($token->[0] eq 'E')  {
                    848: 	    $result.=$token->[2];
                    849: 	}
                    850: 	if ($result =~ /\Q$tag\E/is) {
                    851: 	    ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
                    852: 	    #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    853: 	    #&Apache::lonxml::debug('Result is :'.$1);
                    854: 	    $redo=$tag.$redo;
                    855: 	    &Apache::lonxml::newparser($pars,\$redo);
                    856: 	    last;
                    857: 	}
                    858:     }
                    859:     return $result
1.204     albertel  860: }
                    861: 
                    862: sub increment_counter {
1.247     albertel  863:     my ($increment) = @_;
1.289     sakharuk  864:     if (defined($increment) && $increment gt 0) {
                    865: 	$Apache::lonxml::counter+=$increment;
                    866:     } else {
                    867: 	$Apache::lonxml::counter++;
1.247     albertel  868:     }
1.289     sakharuk  869:     $Apache::lonxml::counter_changed=1;
1.204     albertel  870: }
                    871: 
                    872: sub init_counter {
                    873:     if (defined($ENV{'form.counter'})) {
                    874: 	$Apache::lonxml::counter=$ENV{'form.counter'};
1.247     albertel  875: 	$Apache::lonxml::counter_changed=0;
1.237     sakharuk  876:     } else {
1.204     albertel  877: 	$Apache::lonxml::counter=1;
1.247     albertel  878: 	$Apache::lonxml::counter_changed=1;
1.204     albertel  879:     }
                    880: }
                    881: 
                    882: sub store_counter {
                    883:     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
                    884:     return '';
1.180     albertel  885: }
                    886: 
1.19      albertel  887: sub get_all_text {
1.270     albertel  888:     my($tag,$pars,$style)= @_;
                    889:     my $gotfullstack=1;
                    890:     if (ref($pars) ne 'ARRAY') {
                    891: 	$gotfullstack=0;
                    892: 	$pars=[$pars];
                    893:     }
                    894:     if (ref($style) ne 'HASH') {
                    895: 	$style={};
                    896:     }
                    897:     my $depth=0;
                    898:     my $token;
                    899:     my $result='';
                    900:     if ( $tag =~ m:^/: ) { 
                    901: 	my $tag=substr($tag,1); 
                    902: 	#&Apache::lonxml::debug("have:$tag:");
                    903: 	my $top_empty=0;
                    904: 	while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
                    905: 	    while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
                    906: 		#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
                    907: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    908: 		    $result.=$token->[1];
                    909: 		} elsif ($token->[0] eq 'PI') {
                    910: 		    $result.=$token->[2];
                    911: 		} elsif ($token->[0] eq 'S') {
1.316     albertel  912: 		    if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
                    913: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                    914: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel  915: 		    $result.=$token->[4];
                    916: 		} elsif ($token->[0] eq 'E')  {
1.316     albertel  917: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1.270     albertel  918: 		    #skip sending back the last end tag
1.283     albertel  919: 		    if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1.270     albertel  920: 			my $string=
                    921: 			    '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
                    922: 				$$style{'/'.$token->[1]}.
                    923: 				    $token->[2].
                    924: 					'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    925: 			&Apache::lonxml::newparser($pars,\$string);
                    926: 			#&Apache::lonxml::debug("reParsing $string");
                    927: 			next;
                    928: 		    }
                    929: 		    if ($depth > -1) {
                    930: 			$result.=$token->[2];
                    931: 		    } else {
                    932: 			$$pars[-1]->unget_token($token);
                    933: 		    }
                    934: 		}
                    935: 	    }
                    936: 	    if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
                    937: 	    if (($depth >=0) && ($#$pars > 0) ) {
                    938: 		pop(@$pars);
                    939: 		pop(@Apache::lonxml::pwd);
                    940: 	    }
                    941: 	}
                    942: 	if ($top_empty && $depth >= 0) {
                    943: 	    #never found the end tag ran out of text, throw error send back blank
                    944: 	    &error('Never found end tag for &lt;'.$tag.
                    945: 		   '&gt; current string <pre>'.
1.314     albertel  946: 		   &HTML::Entities::encode($result,'<>&"').
1.270     albertel  947: 		   '</pre>');
                    948: 	    if ($gotfullstack) {
                    949: 		my $newstring='</'.$tag.'>'.$result;
                    950: 		&Apache::lonxml::newparser($pars,\$newstring);
                    951: 	    }
                    952: 	    $result='';
                    953: 	}
                    954:     } else {
                    955: 	while ($#$pars > -1) {
                    956: 	    while ($token = $$pars[-1]->get_token) {
                    957: 		#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                    958: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||
                    959: 		    ($token->[0] eq 'D')) {
                    960: 		    $result.=$token->[1];
                    961: 		} elsif ($token->[0] eq 'PI') {
                    962: 		    $result.=$token->[2];
                    963: 		} elsif ($token->[0] eq 'S') {
1.316     albertel  964: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) {
1.270     albertel  965: 			$$pars[-1]->unget_token($token); last;
                    966: 		    } else {
                    967: 			$result.=$token->[4];
                    968: 		    }
1.316     albertel  969: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                    970: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel  971: 		} elsif ($token->[0] eq 'E')  {
                    972: 		    $result.=$token->[2];
                    973: 		}
                    974: 	    }
                    975: 	    if (($#$pars > 0) ) {
                    976: 		pop(@$pars);
                    977: 		pop(@Apache::lonxml::pwd);
                    978: 	    } else { last; }
                    979: 	}
                    980:     }
                    981:     #&Apache::lonxml::debug("Exit:$result:");
                    982:     return $result
1.19      albertel  983: }
                    984: 
1.23      albertel  985: sub newparser {
                    986:   my ($parser,$contentref,$dir) = @_;
1.167     albertel  987:   push (@$parser,HTML::LCParser->new($contentref));
1.56      albertel  988:   $$parser['-1']->xml_mode('1');
1.23      albertel  989:   if ( $dir eq '' ) {
                    990:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                    991:   } else {
                    992:     push (@Apache::lonxml::pwd, $dir);
                    993:   } 
                    994: }
1.1       sakharuk  995: 
1.8       albertel  996: sub parstring {
                    997:   my ($token) = @_;
                    998:   my $temp='';
1.142     albertel  999:   foreach (@{$token->[3]}) {
1.35      www      1000:     unless ($_=~/\W/) {
1.42      albertel 1001:       my $val=$token->[2]->{$_};
1.231     albertel 1002:       $val =~ s/([\%\@\\\"\'])/\\$1/g;
1.51      albertel 1003:       #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.267     sakharuk 1004:       $temp .= "my \$$_=\"$val\";";
1.20      albertel 1005:     }
1.142     albertel 1006:   }
1.8       albertel 1007:   return $temp;
                   1008: }
1.22      albertel 1009: 
1.34      www      1010: sub writeallows {
1.126     www      1011:     unless ($#extlinks>=0) { return; }
1.34      www      1012:     my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1.111     www      1013:     if ($ENV{'httpref.'.$thisurl}) {
                   1014: 	$thisurl=$ENV{'httpref.'.$thisurl};
                   1015:     }
1.34      www      1016:     my $thisdir=$thisurl;
                   1017:     $thisdir=~s/\/[^\/]+$//;
                   1018:     my %httpref=();
1.142     albertel 1019:     foreach (@extlinks) {
1.34      www      1020:        $httpref{'httpref.'.
1.125     www      1021:  	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1.142     albertel 1022:     }
1.126     www      1023:     @extlinks=();
1.34      www      1024:     &Apache::lonnet::appenv(%httpref);
                   1025: }
                   1026: 
1.281     albertel 1027: sub register_ssi {
                   1028:     my ($url,%form)=@_;
                   1029:     push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
                   1030:     return '';
                   1031: }
                   1032: 
                   1033: sub do_registered_ssi {
                   1034:     foreach my $info (@Apache::lonxml::ssi_info) {
                   1035: 	my %form=%{ $info->{'form'}};
                   1036: 	my $url=$info->{'url'};
                   1037: 	&Apache::lonnet::ssi($url,%form);
                   1038:     }
                   1039: }
1.66      www      1040: #
                   1041: # Afterburner handles anchors, highlights and links
                   1042: #
                   1043: sub afterburn {
                   1044:     my $result=shift;
1.154     albertel 1045:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1046: 					    ['highlight','anchor','link']);
1.66      www      1047:     if ($ENV{'form.highlight'}) {
1.142     albertel 1048:        foreach (split(/\,/,$ENV{'form.highlight'})) {
1.66      www      1049:            my $anchorname=$_;
                   1050: 	   my $matchthis=$anchorname;
                   1051:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1052:            $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1053:        }
1.66      www      1054:     }
                   1055:     if ($ENV{'form.link'}) {
1.142     albertel 1056:        foreach (split(/\,/,$ENV{'form.link'})) {
1.66      www      1057:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1058: 	   my $matchthis=$anchorname;
                   1059:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1060:            $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1061:        }
1.66      www      1062:     }
                   1063:     if ($ENV{'form.anchor'}) {
                   1064:         my $anchorname=$ENV{'form.anchor'};
                   1065: 	my $matchthis=$anchorname;
                   1066:         $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1067:         $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1.66      www      1068:         $result.=(<<"ENDSCRIPT");
1.226     albertel 1069: <script type="text/javascript">
1.66      www      1070:     document.location.hash='$anchorname';
                   1071: </script>
                   1072: ENDSCRIPT
                   1073:     }
                   1074:     return $result;
                   1075: }
                   1076: 
1.79      www      1077: sub storefile {
                   1078:     my ($file,$contents)=@_;
1.290     albertel 1079:     &Apache::lonnet::correct_line_ends(\$contents);
1.79      www      1080:     if (my $fh=Apache::File->new('>'.$file)) {
                   1081: 	print $fh $contents;
                   1082:         $fh->close();
1.271     www      1083:         return 1;
1.147     albertel 1084:     } else {
1.271     www      1085: 	&warning("Unable to save file $file");
                   1086: 	return 0;
1.79      www      1087:     }
                   1088: }
                   1089: 
1.151     albertel 1090: sub createnewhtml {
1.321     www      1091:     my $title=&mt('Title of document goes here');
                   1092:     my $body=&mt('Body of document goes here');
                   1093:     my $filecontents=(<<SIMPLECONTENT);
                   1094: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1.78      www      1095: <html>
                   1096: <head>
1.321     www      1097: <title>$title</title>
1.78      www      1098: </head>
                   1099: <body bgcolor="#FFFFFF">
1.321     www      1100: $body
1.78      www      1101: </body>
                   1102: </html>
                   1103: SIMPLECONTENT
1.321     www      1104:     return $filecontents;
1.151     albertel 1105: }
                   1106: 
1.274     albertel 1107: sub createnewsty {
                   1108:   my $filecontents=(<<SIMPLECONTENT);
                   1109: <definetag name="">
                   1110:     <render>
                   1111:        <web></web>
                   1112:        <tex></tex>
                   1113:     </render>
                   1114: </definetag>
                   1115: SIMPLECONTENT
                   1116:   return $filecontents;
                   1117: }
                   1118: 
1.147     albertel 1119: 
1.151     albertel 1120: sub inserteditinfo {
1.274     albertel 1121:       my ($result,$filecontents,$filetype)=@_;
1.314     albertel 1122:       $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1.147     albertel 1123: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.274     albertel 1124:       my $xml_help = '';
1.321     www      1125:       my $initialize='';
1.274     albertel 1126:       if ($filetype eq 'html') {
1.323     www      1127: 	  my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1.321     www      1128: 	  $initialize=&Apache::lonhtmlcommon::htmlareaheaders().(<<FULLPAGE);
                   1129: <script type="text/javascript">
1.323     www      1130: $addbuttons
                   1131: 
1.321     www      1132:     HTMLArea.loadPlugin("FullPage");
                   1133: 
                   1134:     function initDocument() {
1.323     www      1135: 	var editor=new HTMLArea("filecont",config);
1.321     www      1136: 	editor.registerPlugin(FullPage);
                   1137: 	editor.generate();
                   1138:     }
                   1139: </script>
                   1140: FULLPAGE
                   1141:           $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
                   1142: 	  $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1.274     albertel 1143:       }
                   1144:       my $cleanbut = '';
                   1145:       if ($filetype eq 'html') {
1.280     www      1146: 	  $cleanbut='<input type="submit" name="attemptclean" value="'.
                   1147: 	      &mt('Save and then attempt to clean HTML').'" />';
1.274     albertel 1148:       }
1.254     albertel 1149:       my $titledisplay=&display_title();
1.280     www      1150:       my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
                   1151: 					 'vi' => 'View',
                   1152: 					 'ed' => 'Edit');
1.161     albertel 1153:       my $buttons=(<<BUTTONS);
1.274     albertel 1154: $cleanbut
1.304     matthew  1155: <input type="submit" name="savethisfile" accesskey="s"  value="$lt{'st'}" />
                   1156: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1.161     albertel 1157: BUTTONS
1.78      www      1158:       my $editfooter=(<<ENDFOOTER);
1.321     www      1159: $initialize
1.78      www      1160: <hr />
                   1161: <a name="editsection" />
                   1162: <form method="post">
1.240     albertel 1163: $xml_help
1.280     www      1164: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1.170     www      1165: $buttons<br />
1.321     www      1166: <textarea cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1.170     www      1167: <br />$buttons
1.78      www      1168: <br />
                   1169: </form>
1.254     albertel 1170: $titledisplay
1.321     www      1171: </body>
1.78      www      1172: ENDFOOTER
1.147     albertel 1173: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1174:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1175:       return $result;
                   1176: }
                   1177: 
1.152     albertel 1178: sub get_target {
                   1179:   my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                   1180:   if ( $ENV{'request.state'} eq 'published') {
                   1181:     if ( defined($ENV{'form.grade_target'})
                   1182: 	 && ($viewgrades == 'F' )) {
                   1183:       return ($ENV{'form.grade_target'});
1.153     albertel 1184:     } elsif (defined($ENV{'form.grade_target'})) {
                   1185:       if (($ENV{'form.grade_target'} eq 'web') ||
                   1186: 	  ($ENV{'form.grade_target'} eq 'tex') ) {
                   1187: 	return $ENV{'form.grade_target'}
                   1188:       } else {
                   1189: 	return 'web';
                   1190:       }
1.152     albertel 1191:     } else {
                   1192:       return 'web';
                   1193:     }
                   1194:   } elsif ($ENV{'request.state'} eq 'construct') {
                   1195:     if ( defined($ENV{'form.grade_target'})) {
                   1196:       return ($ENV{'form.grade_target'});
                   1197:     } else {
                   1198:       return 'web';
                   1199:     }
                   1200:   } else {
                   1201:     return 'web';
                   1202:   }
                   1203: }
                   1204: 
1.24      sakharuk 1205: sub handler {
1.255     sakharuk 1206:     my $request=shift;
                   1207:     
                   1208:     my $target=&get_target();
                   1209:     
1.258     albertel 1210:     $Apache::lonxml::debug=$ENV{'user.debug'};
1.255     sakharuk 1211:     
                   1212:     if ($ENV{'browser.mathml'}) {
1.280     www      1213: 	&Apache::loncommon::content_type($request,'text/xml');
1.255     sakharuk 1214:     } else {
1.280     www      1215: 	&Apache::loncommon::content_type($request,'text/html');
1.255     sakharuk 1216:     }
                   1217:     &Apache::loncommon::no_cache($request);
                   1218:     $request->send_http_header;
                   1219:     
                   1220:     return OK if $request->header_only;
1.68      www      1221: 
                   1222: 
1.255     sakharuk 1223:     my $file=&Apache::lonnet::filelocation("",$request->uri);
1.274     albertel 1224:     my $filetype;
                   1225:     if ($file =~ /\.sty$/) {
                   1226: 	$filetype='sty';
                   1227:     } else {
                   1228: 	$filetype='html';
                   1229:     }
1.78      www      1230: #
                   1231: # Edit action? Save file.
                   1232: #
1.255     sakharuk 1233:     unless ($ENV{'request.state'} eq 'published') {
                   1234: 	if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1.271     www      1235: 	    if (&storefile($file,$ENV{'form.filecont'})) {
1.309     albertel 1236: 		&Apache::lonxml::info("<font COLOR=\"#0000FF\">".
                   1237: 				      &mt('Updated').": ".
                   1238: 				      &Apache::lonlocal::locallocaltime(time).
                   1239: 				      " </font>");
1.271     www      1240: 	    } 
1.255     sakharuk 1241: 	}
                   1242:     }
                   1243:     my %mystyle;
                   1244:     my $result = '';
                   1245:     my $filecontents=&Apache::lonnet::getfile($file);
                   1246:     if ($filecontents eq -1) {
1.284     www      1247: 	my $bodytag=&Apache::loncommon::bodytag('File Error');
                   1248: 	my $fnf=&mt('File not found');
1.255     sakharuk 1249: 	$result=(<<ENDNOTFOUND);
1.78      www      1250: <html>
                   1251: <head>
1.284     www      1252: <title>$fnf</title>
1.78      www      1253: </head>
1.284     www      1254: $bodytag
                   1255: <b>$fnf: $file</b>
1.78      www      1256: </body>
                   1257: </html>
                   1258: ENDNOTFOUND
1.50      albertel 1259:     $filecontents='';
1.255     sakharuk 1260: 	if ($ENV{'request.state'} ne 'published') {
1.274     albertel 1261: 	    if ($filetype eq 'sty') {
                   1262: 		$filecontents=&createnewsty();
                   1263: 	    } else {
                   1264: 		$filecontents=&createnewhtml();
                   1265: 	    }
1.255     sakharuk 1266: 	    $ENV{'form.editmode'}='Edit'; #force edit mode
                   1267: 	}
                   1268:     } else {
                   1269: 	unless ($ENV{'request.state'} eq 'published') {
                   1270: 	    if ($ENV{'form.attemptclean'}) {
                   1271: 		$filecontents=&htmlclean($filecontents,1);
                   1272: 	    }
1.264     www      1273: #
                   1274: # we are in construction space, see if edit mode forced
                   1275:             &Apache::loncommon::get_unprocessed_cgi
                   1276:                           ($ENV{'QUERY_STRING'},['editmode']);
1.255     sakharuk 1277: 	}
                   1278: 	if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
                   1279: 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1280: 						'',%mystyle);
                   1281: 	}
1.147     albertel 1282:     }
1.255     sakharuk 1283:     
1.78      www      1284: #
                   1285: # Edit action? Insert editing commands
                   1286: #
1.255     sakharuk 1287:     unless ($ENV{'request.state'} eq 'published') {
                   1288: 	if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
                   1289: 	    my $displayfile=$request->uri;
                   1290: 	    $displayfile=~s/^\/[^\/]*//;
1.309     albertel 1291: 	    $result='<html><body bgcolor="#FFFFFF">'.
                   1292: 		&Apache::lonxml::message_location().'<h3>'.
                   1293: 		$displayfile.
1.255     sakharuk 1294: 		'</h3></body></html>';
1.274     albertel 1295: 	    $result=&inserteditinfo($result,$filecontents,$filetype);
1.255     sakharuk 1296: 	}
1.147     albertel 1297:     }
1.274     albertel 1298:     if ($filetype eq 'html') { writeallows($request->uri); }
                   1299: 	
1.255     sakharuk 1300:     
1.309     albertel 1301:     &Apache::lonxml::add_messages(\$result);
1.255     sakharuk 1302:     $request->print($result);
                   1303:     
                   1304:     return OK;
1.253     albertel 1305: }
                   1306: 
                   1307: sub display_title {
                   1308:     my $result;
                   1309:     if ($ENV{'request.state'} eq 'construct') {
                   1310: 	my $title=&Apache::lonnet::gettitle();
                   1311: 	if (!defined($title) || $title eq '') {
                   1312: 	    $title = $ENV{'request.filename'};
                   1313: 	    $title = substr($title, rindex($title, '/') + 1);
                   1314: 	}
                   1315: 	$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
                   1316:     }
                   1317:     return $result;
1.24      sakharuk 1318: }
1.147     albertel 1319: 
1.22      albertel 1320: sub debug {
1.298     albertel 1321:     if ($Apache::lonxml::debug eq "1") {
                   1322: 	$|=1;
1.300     albertel 1323: 	my $request=$Apache::lonxml::request;
                   1324: 	if (!$request) { $request=Apache->request; }
1.314     albertel 1325: 	$request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1.327     sakharuk 1326: #	&Apache::lonnet::logthis($_[0]);
1.298     albertel 1327:     }
1.22      albertel 1328: }
1.49      albertel 1329: 
1.22      albertel 1330: sub error {
1.205     www      1331:   $errorcount++;
1.300     albertel 1332:   my $request=$Apache::lonxml::request;
                   1333:   if (!$request) { $request=Apache->request; }
1.74      albertel 1334:   if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1.166     matthew  1335:     # If printing in construction space, put the error inside <pre></pre>
1.309     albertel 1336:       push(@Apache::lonxml::error_messages,
                   1337: 	   $Apache::lonxml::warnings_error_header.
                   1338: 	   "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1.295     albertel 1339:       $Apache::lonxml::warnings_error_header='';
1.52      albertel 1340:   } else {
1.309     albertel 1341:       push(@Apache::lonxml::error_messages,
                   1342: 	   "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />");
1.52      albertel 1343:     #notify author
1.146     albertel 1344:     &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1.52      albertel 1345:     #notify course
                   1346:     if ( $ENV{'request.course.id'} ) {
1.209     www      1347:       my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1.143     www      1348:       my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1.209     www      1349:       foreach (keys %users) {
                   1350: 	my ($user,$domain) = split(/:/, $_);
1.143     www      1351: 	&Apache::lonmsg::user_normal_msg($user,$domain,
1.146     albertel 1352:         "Error [$declutter]",join('<br />',@_));
1.52      albertel 1353:       }
                   1354:     }
                   1355:   }
1.22      albertel 1356: }
1.49      albertel 1357: 
1.22      albertel 1358: sub warning {
1.295     albertel 1359:     $warningcount++;
1.261     albertel 1360:   
1.295     albertel 1361:     if ($ENV{'form.grade_target'} ne 'tex') {
                   1362: 	if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1.300     albertel 1363: 	    my $request=$Apache::lonxml::request;
                   1364: 	    if (!$request) { $request=Apache->request; }
1.309     albertel 1365: 	    push(@Apache::lonxml::warning_messages,
                   1366: 		 $Apache::lonxml::warnings_error_header.
                   1367: 		 "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1.295     albertel 1368: 	    $Apache::lonxml::warnings_error_header='';
                   1369: 	}
                   1370:     }
1.309     albertel 1371: }
                   1372: 
                   1373: sub info {
                   1374:     if ($ENV{'form.grade_target'} ne 'tex' 
                   1375: 	&& $ENV{'request.state'} eq 'construct') {
                   1376: 	push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
                   1377:     }
                   1378: }
                   1379: 
                   1380: sub message_location {
                   1381:     return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
                   1382: }
                   1383: 
                   1384: sub add_messages {
                   1385:     my ($msg)=@_;
                   1386:     my $result=join(' ',
                   1387: 		    @Apache::lonxml::info_messages,
                   1388: 		    @Apache::lonxml::error_messages,
                   1389: 		    @Apache::lonxml::warning_messages);
                   1390:     undef(@Apache::lonxml::info_messages);
                   1391:     undef(@Apache::lonxml::error_messages);
                   1392:     undef(@Apache::lonxml::warning_messages);
                   1393:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
                   1394:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1.83      albertel 1395: }
                   1396: 
                   1397: sub get_param {
1.213     albertel 1398:     my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
                   1399:     if ( ! $context ) { $context = -1; }
                   1400:     my $args ='';
                   1401:     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1402:     if ( ! $Apache::lonxml::usestyle ) {
                   1403: 	$args=$Apache::lonxml::style_values.$args;
                   1404:     }
1.213     albertel 1405:     if ( ! $args ) { return undef; }
                   1406:     if ( $case_insensitive ) {
                   1407: 	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
                   1408: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1409:                                      $safeeval); #'
                   1410: 	} else {
                   1411: 	    return undef;
                   1412: 	}
                   1413:     } else {
                   1414: 	if ( $args =~ /my \$\Q$param\E=\"/ ) {
                   1415: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1416:                                      $safeeval); #'
                   1417: 	} else {
                   1418: 	    return undef;
                   1419: 	}
                   1420:     }
1.22      albertel 1421: }
                   1422: 
1.132     albertel 1423: sub get_param_var {
1.213     albertel 1424:   my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1.132     albertel 1425:   if ( ! $context ) { $context = -1; }
                   1426:   my $args ='';
                   1427:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1428:   if ( ! $Apache::lonxml::usestyle ) {
                   1429:       $args=$Apache::lonxml::style_values.$args;
                   1430:   }
1.230     albertel 1431:   &Apache::lonxml::debug("Args are $args param is $param");
1.213     albertel 1432:   if ($case_insensitive) {
                   1433:       if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
                   1434: 	  return undef;
                   1435:       }
                   1436:   } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1.132     albertel 1437:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.230     albertel 1438:   &Apache::lonxml::debug("first run is $value");
                   1439:   if ($value =~ /^[\$\@\%]\w+$/) {
                   1440:       &Apache::lonxml::debug("doing second");
                   1441:       my @result=&Apache::run::run("return $value",$safeeval,1);
                   1442:       if (!defined($result[0])) {
                   1443: 	  return $value
                   1444:       } else {
                   1445: 	  if (wantarray) { return @result; } else { return $result[0]; }
                   1446:       }
1.132     albertel 1447:   } else {
                   1448:     return $value;
                   1449:   }
                   1450: }
                   1451: 
1.74      albertel 1452: sub register_insert {
1.75      albertel 1453:   my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74      albertel 1454:   my $i;
1.76      albertel 1455:   my $tagnum=0;
1.74      albertel 1456:   my @order;
                   1457:   for ($i=0;$i < $#data; $i++) {
                   1458:     my $line = $data[$i];
                   1459:     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
                   1460:     if ( $line =~ /TABLE/ ) { last; }
1.268     bowersj2 1461:     my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1.135     albertel 1462:     if ($tag) {
                   1463:       $insertlist{"$tagnum.tag"} = $tag;
                   1464:       $insertlist{"$tagnum.description"} = $descrip;
                   1465:       $insertlist{"$tagnum.color"} = $color;
                   1466:       $insertlist{"$tagnum.function"} = $function;
                   1467:       if (!defined($show)) { $show='yes'; }
                   1468:       $insertlist{"$tagnum.show"}= $show;
1.268     bowersj2 1469:       $insertlist{"$tagnum.helpfile"} = $helpfile;
                   1470:       $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1.135     albertel 1471:       $insertlist{"$tag.num"}=$tagnum;
                   1472:       $tagnum++;
                   1473:     }
1.74      albertel 1474:   }
1.76      albertel 1475:   $i++; #skipping TABLE line
                   1476:   $tagnum = 0;
1.74      albertel 1477:   for (;$i < $#data;$i++) {
                   1478:     my $line = $data[$i];
1.76      albertel 1479:     my ($mnemonic,@which) = split(/ +/,$line);
                   1480:     my $tag = $insertlist{"$tagnum.tag"};
1.144     matthew  1481:     for (my $j=0;$j <=$#which;$j++) {
1.74      albertel 1482:       if ( $which[$j] eq 'Y' ) {
1.76      albertel 1483: 	if ($insertlist{"$j.show"} ne 'no') {
                   1484: 	  push(@{ $insertlist{"$tag.which"} },$j);
                   1485: 	}
1.74      albertel 1486:       }
                   1487:     }
1.76      albertel 1488:     $tagnum++;
1.74      albertel 1489:   }
                   1490: }
1.98      albertel 1491: 
                   1492: sub description {
                   1493:   my ($token)=@_;
1.138     albertel 1494:   my $tagnum;
                   1495:   my $tag=$token->[1];
                   1496:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1497:     my $testtag=$namespace.'::'.$tag;
                   1498:     $tagnum=$insertlist{"$testtag.num"};
                   1499:     if (defined($tagnum)) { last; }
                   1500:   }
                   1501:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1502:   return $insertlist{$tagnum.'.description'};
1.268     bowersj2 1503: }
                   1504: 
                   1505: # Returns a list containing the help file, and the description
                   1506: sub helpinfo {
                   1507:   my ($token)=@_;
                   1508:   my $tagnum;
                   1509:   my $tag=$token->[1];
                   1510:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1511:     my $testtag=$namespace.'::'.$tag;
                   1512:     $tagnum=$insertlist{"$testtag.num"};
                   1513:     if (defined($tagnum)) { last; }
                   1514:   }
                   1515:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1516:   return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1.98      albertel 1517: }
1.123     albertel 1518: 
                   1519: # ----------------------------------------------------------------- whichuser
                   1520: # returns a list of $symb, $courseid, $domain, $name that is correct for
                   1521: # calls to lonnet functions for this setup.
                   1522: # - looks for form.grade_ parameters
                   1523: sub whichuser {
1.262     matthew  1524:   my ($passedsymb)=@_;
1.245     albertel 1525:   my ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1526:   if (defined($ENV{'form.grade_symb'})) {
                   1527:     my $tmp_courseid=$ENV{'form.grade_courseid'};
1.269     albertel 1528:     my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1.123     albertel 1529:     if ($allowed) {
                   1530:       $symb=$ENV{'form.grade_symb'};
                   1531:       $courseid=$ENV{'form.grade_courseid'};
                   1532:       $domain=$ENV{'form.grade_domain'};
                   1533:       $name=$ENV{'form.grade_username'};
                   1534:     }
1.134     albertel 1535:   } else {
1.262     matthew  1536:       if (!$passedsymb) {
                   1537:           $symb=&Apache::lonnet::symbread();
                   1538:       } else {
                   1539:           $symb=$passedsymb;
                   1540:       }
1.244     albertel 1541:       $courseid=$ENV{'request.course.id'};
                   1542:       $domain=$ENV{'user.domain'};
                   1543:       $name=$ENV{'user.name'};
                   1544:       if ($name eq 'public' && $domain eq 'public') {
                   1545: 	  if (!defined($ENV{'form.username'})) {
                   1546: 	      $ENV{'form.username'}.=time.rand(10000000);
                   1547: 	  }
                   1548: 	  $name.=$ENV{'form.username'};
                   1549:       }
1.123     albertel 1550:   }
1.245     albertel 1551:   return ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1552: }
                   1553: 
1.1       sakharuk 1554: 1;
                   1555: __END__
1.68      www      1556: 
                   1557: 

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